Merge commit mesa-public/master into vulkan

This pulls in the patches that move all of the compiler stuff around

90 files changed, 33615 insertions, 0 deletions

diff --git a/src/compiler/nir/.gitignore b/src/compiler/nir/.gitignore
new file mode 100644
index 00000000000..64828eba6d3
--- /dev/null
+++ b/src/compiler/nir/.gitignore
@@ -0,0 +1,5 @@
+nir_builder_opcodes.h
+nir_opt_algebraic.c
+nir_opcodes.c
+nir_opcodes.h
+nir_constant_expressions.c
diff --git a/src/compiler/nir/Makefile.sources b/src/compiler/nir/Makefile.sources
new file mode 100644
index 00000000000..04e8ab88a35
--- /dev/null
+++ b/src/compiler/nir/Makefile.sources
@@ -0,0 +1,87 @@
+NIR_GENERATED_FILES = \
+	nir_builder_opcodes.h \
+	nir_constant_expressions.c \
+	nir_opcodes.c \
+	nir_opcodes.h \
+	nir_opt_algebraic.c
+
+NIR_FILES = \
+	glsl_to_nir.cpp \
+	glsl_to_nir.h \
+	nir.c \
+	nir.h \
+	nir_array.h \
+	nir_builder.h \
+	nir_clone.c \
+	nir_constant_expressions.h \
+	nir_control_flow.c \
+	nir_control_flow.h \
+	nir_control_flow_private.h \
+	nir_dominance.c \
+	nir_from_ssa.c \
+	nir_gather_info.c \
+	nir_gs_count_vertices.c \
+	nir_inline_functions.c \
+	nir_intrinsics.c \
+	nir_intrinsics.h \
+	nir_instr_set.c \
+	nir_instr_set.h \
+	nir_liveness.c \
+	nir_lower_alu_to_scalar.c \
+	nir_lower_atomics.c \
+	nir_lower_clip.c \
+	nir_lower_global_vars_to_local.c \
+	nir_lower_gs_intrinsics.c \
+        nir_lower_indirect_derefs.c \
+	nir_lower_load_const_to_scalar.c \
+	nir_lower_locals_to_regs.c \
+	nir_lower_idiv.c \
+	nir_lower_io.c \
+	nir_lower_outputs_to_temporaries.c \
+	nir_lower_phis_to_scalar.c \
+	nir_lower_returns.c \
+	nir_lower_samplers.c \
+	nir_lower_system_values.c \
+	nir_lower_tex.c \
+	nir_lower_to_source_mods.c \
+	nir_lower_two_sided_color.c \
+	nir_lower_vars_to_ssa.c \
+	nir_lower_var_copies.c \
+	nir_lower_vec_to_movs.c \
+	nir_metadata.c \
+	nir_move_vec_src_uses_to_dest.c \
+	nir_normalize_cubemap_coords.c \
+	nir_opt_constant_folding.c \
+	nir_opt_copy_propagate.c \
+	nir_opt_cse.c \
+	nir_opt_dce.c \
+	nir_opt_dead_cf.c \
+	nir_opt_gcm.c \
+	nir_opt_global_to_local.c \
+	nir_opt_peephole_select.c \
+	nir_opt_remove_phis.c \
+	nir_opt_undef.c \
+	nir_phi_builder.c \
+	nir_phi_builder.h \
+	nir_print.c \
+	nir_remove_dead_variables.c \
+	nir_repair_ssa.c \
+	nir_search.c \
+	nir_search.h \
+	nir_split_var_copies.c \
+	nir_sweep.c \
+	nir_to_ssa.c \
+	nir_validate.c \
+	nir_vla.h \
+	nir_worklist.c \
+	nir_worklist.h
+
+SPIRV_FILES = \
+	spirv/nir_spirv.h \
+	spirv/spirv_to_nir.c \
+	spirv/vtn_alu.c \
+	spirv/vtn_cfg.c \
+	spirv/vtn_glsl450.c \
+	spirv/vtn_private.h \
+	spirv/vtn_variables.c
+
diff --git a/src/compiler/nir/README b/src/compiler/nir/README
new file mode 100644
index 00000000000..2c81db9db61
--- /dev/null
+++ b/src/compiler/nir/README
@@ -0,0 +1,118 @@
+New IR, or NIR, is an IR for Mesa intended to sit below GLSL IR and Mesa IR.
+Its design inherits from the various IR's that Mesa has used in the past, as
+well as Direct3D assembly, and it includes a few new ideas as well. It is a
+flat (in terms of using instructions instead of expressions), typeless IR,
+similar to TGSI and Mesa IR.  It also supports SSA (although it doesn't require
+it).
+
+Variables
+=========
+
+NIR includes support for source-level GLSL variables through a structure mostly
+copied from GLSL IR. These will be used for linking and conversion from GLSL IR
+(and later, from an AST), but for the most part, they will be lowered to
+registers (see below) and loads/stores.
+
+Registers
+=========
+
+Registers are light-weight; they consist of a structure that only contains its
+size, its index for liveness analysis, and an optional name for debugging. In
+addition, registers can be local to a function or global to the entire shader;
+the latter will be used in ARB_shader_subroutine for passing parameters and
+getting return values from subroutines. Registers can also be an array, in which
+case they can be accessed indirectly. Each ALU instruction (add, subtract, etc.)
+works directly with registers or SSA values (see below).
+
+SSA
+========
+
+Everywhere a register can be loaded/stored, an SSA value can be used instead.
+The only exception is that arrays/indirect addressing are not supported with
+SSA; although research has been done on extensions of SSA to arrays before, it's
+usually for the purpose of parallelization (which we're not interested in), and
+adds some overhead in the form of adding copies or extra arrays (which is much
+more expensive than introducing copies between non-array registers). SSA uses
+point directly to their corresponding definition, which in turn points to the
+instruction it is part of. This creates an implicit use-def chain and avoids the
+need for an external structure for each SSA register.
+
+Functions
+=========
+
+Support for function calls is mostly similar to GLSL IR. Each shader contains a
+list of functions, and each function has a list of overloads. Each overload
+contains a list of parameters, and may contain an implementation which specifies
+the variables that correspond to the parameters and return value. Inlining a
+function, assuming it has a single return point, is as simple as copying its
+instructions, registers, and local variables into the target function and then
+inserting copies to and from the new parameters as appropriate. After functions
+are inlined and any non-subroutine functions are deleted, parameters and return
+variables will be converted to global variables and then global registers. We
+don't do this lowering earlier (i.e. the fortranizer idea) for a few reasons:
+
+- If we want to do optimizations before link time, we need to have the function
+signature available during link-time.
+
+- If we do any inlining before link time, then we might wind up with the
+inlined function and the non-inlined function using the same global
+variables/registers which would preclude optimization.
+
+Intrinsics
+=========
+
+Any operation (other than function calls and textures) which touches a variable
+or is not referentially transparent is represented by an intrinsic. Intrinsics
+are similar to the idea of a "builtin function," i.e. a function declaration
+whose implementation is provided by the backend, except they are more powerful
+in the following ways:
+
+- They can also load and store registers when appropriate, which limits the
+number of variables needed in later stages of the IR while obviating the need
+for a separate load/store variable instruction.
+
+- Intrinsics can be marked as side-effect free, which permits them to be
+treated like any other instruction when it comes to optimizations. This allows
+load intrinsics to be represented as intrinsics while still being optimized
+away by dead code elimination, common subexpression elimination, etc.
+
+Intrinsics are used for:
+
+- Atomic operations
+- Memory barriers
+- Subroutine calls
+- Geometry shader emitVertex and endPrimitive
+- Loading and storing variables (before lowering)
+- Loading and storing uniforms, shader inputs and outputs, etc (after lowering)
+- Copying variables (cases where in GLSL the destination is a structure or
+array)
+- The kitchen sink
+- ...
+
+Textures
+=========
+
+Unfortunately, there are far too many texture operations to represent each one
+of them with an intrinsic, so there's a special texture instruction similar to
+the GLSL IR one. The biggest difference is that, while the texture instruction
+has a sampler dereference field used just like in GLSL IR, this gets lowered to
+a texture unit index (with a possible indirect offset) while the type
+information of the original sampler is kept around for backends. Also, all the
+non-constant sources are stored in a single array to make it easier for
+optimization passes to iterate over all the sources.
+
+Control Flow
+=========
+
+Like in GLSL IR, control flow consists of a tree of "control flow nodes", which
+include if statements and loops, and jump instructions (break, continue, and
+return). Unlike GLSL IR, though, the leaves of the tree aren't statements but
+basic blocks. Each basic block also keeps track of its successors and
+predecessors, and function implementations keep track of the beginning basic
+block (the first basic block of the function) and the ending basic block (a fake
+basic block that every return statement points to). Together, these elements
+make up the control flow graph, in this case a redundant piece of information on
+top of the control flow tree that will be used by almost all the optimizations.
+There are helper functions to add and remove control flow nodes that also update
+the control flow graph, and so usually it doesn't need to be touched by passes
+that modify control flow nodes.
diff --git a/src/compiler/nir/glsl_to_nir.cpp b/src/compiler/nir/glsl_to_nir.cpp
new file mode 100644
index 00000000000..2a3047dd33c
--- /dev/null
+++ b/src/compiler/nir/glsl_to_nir.cpp
@@ -0,0 +1,2035 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "glsl_to_nir.h"
+#include "nir_control_flow.h"
+#include "nir_builder.h"
+#include "compiler/glsl/ir_visitor.h"
+#include "compiler/glsl/ir_hierarchical_visitor.h"
+#include "compiler/glsl/ir.h"
+#include "main/imports.h"
+
+/*
+ * pass to lower GLSL IR to NIR
+ *
+ * This will lower variable dereferences to loads/stores of corresponding
+ * variables in NIR - the variables will be converted to registers in a later
+ * pass.
+ */
+
+namespace {
+
+class nir_visitor : public ir_visitor
+{
+public:
+   nir_visitor(nir_shader *shader, gl_shader *sh);
+   ~nir_visitor();
+
+   virtual void visit(ir_variable *);
+   virtual void visit(ir_function *);
+   virtual void visit(ir_function_signature *);
+   virtual void visit(ir_loop *);
+   virtual void visit(ir_if *);
+   virtual void visit(ir_discard *);
+   virtual void visit(ir_loop_jump *);
+   virtual void visit(ir_return *);
+   virtual void visit(ir_call *);
+   virtual void visit(ir_assignment *);
+   virtual void visit(ir_emit_vertex *);
+   virtual void visit(ir_end_primitive *);
+   virtual void visit(ir_expression *);
+   virtual void visit(ir_swizzle *);
+   virtual void visit(ir_texture *);
+   virtual void visit(ir_constant *);
+   virtual void visit(ir_dereference_variable *);
+   virtual void visit(ir_dereference_record *);
+   virtual void visit(ir_dereference_array *);
+   virtual void visit(ir_barrier *);
+
+   void create_function(ir_function_signature *ir);
+
+private:
+   void add_instr(nir_instr *instr, unsigned num_components);
+   nir_ssa_def *evaluate_rvalue(ir_rvalue *ir);
+
+   nir_alu_instr *emit(nir_op op, unsigned dest_size, nir_ssa_def **srcs);
+   nir_alu_instr *emit(nir_op op, unsigned dest_size, nir_ssa_def *src1);
+   nir_alu_instr *emit(nir_op op, unsigned dest_size, nir_ssa_def *src1,
+                       nir_ssa_def *src2);
+   nir_alu_instr *emit(nir_op op, unsigned dest_size, nir_ssa_def *src1,
+                       nir_ssa_def *src2, nir_ssa_def *src3);
+
+   bool supports_ints;
+
+   struct gl_shader *sh;
+
+   nir_shader *shader;
+   nir_function_impl *impl;
+   nir_builder b;
+   nir_ssa_def *result; /* result of the expression tree last visited */
+
+   nir_deref_var *evaluate_deref(nir_instr *mem_ctx, ir_instruction *ir);
+
+   /* the head of the dereference chain we're creating */
+   nir_deref_var *deref_head;
+   /* the tail of the dereference chain we're creating */
+   nir_deref *deref_tail;
+
+   nir_variable *var; /* variable created by ir_variable visitor */
+
+   /* whether the IR we're operating on is per-function or global */
+   bool is_global;
+
+   /* map of ir_variable -> nir_variable */
+   struct hash_table *var_table;
+
+   /* map of ir_function_signature -> nir_function_overload */
+   struct hash_table *overload_table;
+};
+
+/*
+ * This visitor runs before the main visitor, calling create_function() for
+ * each function so that the main visitor can resolve forward references in
+ * calls.
+ */
+
+class nir_function_visitor : public ir_hierarchical_visitor
+{
+public:
+   nir_function_visitor(nir_visitor *v) : visitor(v)
+   {
+   }
+   virtual ir_visitor_status visit_enter(ir_function *);
+
+private:
+   nir_visitor *visitor;
+};
+
+}; /* end of anonymous namespace */
+
+nir_shader *
+glsl_to_nir(const struct gl_shader_program *shader_prog,
+            gl_shader_stage stage,
+            const nir_shader_compiler_options *options)
+{
+   struct gl_shader *sh = shader_prog->_LinkedShaders[stage];
+
+   nir_shader *shader = nir_shader_create(NULL, stage, options);
+
+   nir_visitor v1(shader, sh);
+   nir_function_visitor v2(&v1);
+   v2.run(sh->ir);
+   visit_exec_list(sh->ir, &v1);
+
+   nir_function *main = NULL;
+   nir_foreach_function(shader, func) {
+      if (strcmp(func->name, "main") == 0) {
+         main = func;
+         break;
+      }
+   }
+   assert(main);
+
+   nir_lower_outputs_to_temporaries(shader, main);
+
+   shader->info.name = ralloc_asprintf(shader, "GLSL%d", shader_prog->Name);
+   if (shader_prog->Label)
+      shader->info.label = ralloc_strdup(shader, shader_prog->Label);
+   shader->info.num_textures = _mesa_fls(sh->Program->SamplersUsed);
+   shader->info.num_ubos = sh->NumUniformBlocks;
+   shader->info.num_abos = shader_prog->NumAtomicBuffers;
+   shader->info.num_ssbos = sh->NumShaderStorageBlocks;
+   shader->info.num_images = sh->NumImages;
+   shader->info.inputs_read = sh->Program->InputsRead;
+   shader->info.outputs_written = sh->Program->OutputsWritten;
+   shader->info.patch_inputs_read = sh->Program->PatchInputsRead;
+   shader->info.patch_outputs_written = sh->Program->PatchOutputsWritten;
+   shader->info.system_values_read = sh->Program->SystemValuesRead;
+   shader->info.uses_texture_gather = sh->Program->UsesGather;
+   shader->info.uses_clip_distance_out =
+      sh->Program->ClipDistanceArraySize != 0;
+   shader->info.separate_shader = shader_prog->SeparateShader;
+   shader->info.has_transform_feedback_varyings =
+      shader_prog->TransformFeedback.NumVarying > 0;
+
+   switch (stage) {
+   case MESA_SHADER_TESS_CTRL:
+      shader->info.tcs.vertices_out = shader_prog->TessCtrl.VerticesOut;
+      break;
+
+   case MESA_SHADER_GEOMETRY:
+      shader->info.gs.vertices_in = shader_prog->Geom.VerticesIn;
+      shader->info.gs.output_primitive = sh->Geom.OutputType;
+      shader->info.gs.vertices_out = sh->Geom.VerticesOut;
+      shader->info.gs.invocations = sh->Geom.Invocations;
+      shader->info.gs.uses_end_primitive = shader_prog->Geom.UsesEndPrimitive;
+      shader->info.gs.uses_streams = shader_prog->Geom.UsesStreams;
+      break;
+
+   case MESA_SHADER_FRAGMENT: {
+      struct gl_fragment_program *fp =
+         (struct gl_fragment_program *)sh->Program;
+
+      shader->info.fs.uses_discard = fp->UsesKill;
+      shader->info.fs.early_fragment_tests = sh->EarlyFragmentTests;
+      shader->info.fs.depth_layout = fp->FragDepthLayout;
+      break;
+   }
+
+   case MESA_SHADER_COMPUTE: {
+      struct gl_compute_program *cp = (struct gl_compute_program *)sh->Program;
+      shader->info.cs.local_size[0] = cp->LocalSize[0];
+      shader->info.cs.local_size[1] = cp->LocalSize[1];
+      shader->info.cs.local_size[2] = cp->LocalSize[2];
+      break;
+   }
+
+   default:
+      break; /* No stage-specific info */
+   }
+
+   return shader;
+}
+
+nir_visitor::nir_visitor(nir_shader *shader, gl_shader *sh)
+{
+   this->supports_ints = shader->options->native_integers;
+   this->shader = shader;
+   this->sh = sh;
+   this->is_global = true;
+   this->var_table = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
+                                             _mesa_key_pointer_equal);
+   this->overload_table = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
+                                                  _mesa_key_pointer_equal);
+}
+
+nir_visitor::~nir_visitor()
+{
+   _mesa_hash_table_destroy(this->var_table, NULL);
+   _mesa_hash_table_destroy(this->overload_table, NULL);
+}
+
+nir_deref_var *
+nir_visitor::evaluate_deref(nir_instr *mem_ctx, ir_instruction *ir)
+{
+   ir->accept(this);
+   ralloc_steal(mem_ctx, this->deref_head);
+   return this->deref_head;
+}
+
+static nir_constant *
+constant_copy(ir_constant *ir, void *mem_ctx)
+{
+   if (ir == NULL)
+      return NULL;
+
+   nir_constant *ret = ralloc(mem_ctx, nir_constant);
+
+   unsigned total_elems = ir->type->components();
+   unsigned i;
+
+   ret->num_elements = 0;
+   switch (ir->type->base_type) {
+   case GLSL_TYPE_UINT:
+      for (i = 0; i < total_elems; i++)
+         ret->value.u[i] = ir->value.u[i];
+      break;
+
+   case GLSL_TYPE_INT:
+      for (i = 0; i < total_elems; i++)
+         ret->value.i[i] = ir->value.i[i];
+      break;
+
+   case GLSL_TYPE_FLOAT:
+      for (i = 0; i < total_elems; i++)
+         ret->value.f[i] = ir->value.f[i];
+      break;
+
+   case GLSL_TYPE_BOOL:
+      for (i = 0; i < total_elems; i++)
+         ret->value.b[i] = ir->value.b[i];
+      break;
+
+   case GLSL_TYPE_STRUCT:
+      ret->elements = ralloc_array(mem_ctx, nir_constant *,
+                                   ir->type->length);
+      ret->num_elements = ir->type->length;
+
+      i = 0;
+      foreach_in_list(ir_constant, field, &ir->components) {
+         ret->elements[i] = constant_copy(field, mem_ctx);
+         i++;
+      }
+      break;
+
+   case GLSL_TYPE_ARRAY:
+      ret->elements = ralloc_array(mem_ctx, nir_constant *,
+                                   ir->type->length);
+      ret->num_elements = ir->type->length;
+
+      for (i = 0; i < ir->type->length; i++)
+         ret->elements[i] = constant_copy(ir->array_elements[i], mem_ctx);
+      break;
+
+   default:
+      unreachable("not reached");
+   }
+
+   return ret;
+}
+
+void
+nir_visitor::visit(ir_variable *ir)
+{
+   nir_variable *var = ralloc(shader, nir_variable);
+   var->type = ir->type;
+   var->name = ralloc_strdup(var, ir->name);
+
+   var->data.read_only = ir->data.read_only;
+   var->data.centroid = ir->data.centroid;
+   var->data.sample = ir->data.sample;
+   var->data.patch = ir->data.patch;
+   var->data.invariant = ir->data.invariant;
+   var->data.location = ir->data.location;
+
+   switch(ir->data.mode) {
+   case ir_var_auto:
+   case ir_var_temporary:
+      if (is_global)
+         var->data.mode = nir_var_global;
+      else
+         var->data.mode = nir_var_local;
+      break;
+
+   case ir_var_function_in:
+   case ir_var_function_out:
+   case ir_var_function_inout:
+   case ir_var_const_in:
+      var->data.mode = nir_var_local;
+      break;
+
+   case ir_var_shader_in:
+      if (shader->stage == MESA_SHADER_FRAGMENT &&
+          ir->data.location == VARYING_SLOT_FACE) {
+         /* For whatever reason, GLSL IR makes gl_FrontFacing an input */
+         var->data.location = SYSTEM_VALUE_FRONT_FACE;
+         var->data.mode = nir_var_system_value;
+      } else if (shader->stage == MESA_SHADER_GEOMETRY &&
+                 ir->data.location == VARYING_SLOT_PRIMITIVE_ID) {
+         /* For whatever reason, GLSL IR makes gl_PrimitiveIDIn an input */
+         var->data.location = SYSTEM_VALUE_PRIMITIVE_ID;
+         var->data.mode = nir_var_system_value;
+      } else {
+         var->data.mode = nir_var_shader_in;
+      }
+      break;
+
+   case ir_var_shader_out:
+      var->data.mode = nir_var_shader_out;
+      break;
+
+   case ir_var_uniform:
+      var->data.mode = nir_var_uniform;
+      break;
+
+   case ir_var_shader_storage:
+      var->data.mode = nir_var_shader_storage;
+      break;
+
+   case ir_var_system_value:
+      var->data.mode = nir_var_system_value;
+      break;
+
+   default:
+      unreachable("not reached");
+   }
+
+   var->data.interpolation = ir->data.interpolation;
+   var->data.origin_upper_left = ir->data.origin_upper_left;
+   var->data.pixel_center_integer = ir->data.pixel_center_integer;
+   var->data.explicit_location = ir->data.explicit_location;
+   var->data.explicit_index = ir->data.explicit_index;
+   var->data.explicit_binding = ir->data.explicit_binding;
+   var->data.has_initializer = ir->data.has_initializer;
+   var->data.location_frac = ir->data.location_frac;
+   var->data.from_named_ifc_block_array = ir->data.from_named_ifc_block_array;
+   var->data.from_named_ifc_block_nonarray = ir->data.from_named_ifc_block_nonarray;
+
+   switch (ir->data.depth_layout) {
+   case ir_depth_layout_none:
+      var->data.depth_layout = nir_depth_layout_none;
+      break;
+   case ir_depth_layout_any:
+      var->data.depth_layout = nir_depth_layout_any;
+      break;
+   case ir_depth_layout_greater:
+      var->data.depth_layout = nir_depth_layout_greater;
+      break;
+   case ir_depth_layout_less:
+      var->data.depth_layout = nir_depth_layout_less;
+      break;
+   case ir_depth_layout_unchanged:
+      var->data.depth_layout = nir_depth_layout_unchanged;
+      break;
+   default:
+      unreachable("not reached");
+   }
+
+   var->data.index = ir->data.index;
+   var->data.descriptor_set = 0;
+   var->data.binding = ir->data.binding;
+   var->data.offset = ir->data.offset;
+   var->data.image.read_only = ir->data.image_read_only;
+   var->data.image.write_only = ir->data.image_write_only;
+   var->data.image.coherent = ir->data.image_coherent;
+   var->data.image._volatile = ir->data.image_volatile;
+   var->data.image.restrict_flag = ir->data.image_restrict;
+   var->data.image.format = ir->data.image_format;
+   var->data.max_array_access = ir->data.max_array_access;
+
+   var->num_state_slots = ir->get_num_state_slots();
+   if (var->num_state_slots > 0) {
+      var->state_slots = ralloc_array(var, nir_state_slot,
+                                      var->num_state_slots);
+
+      ir_state_slot *state_slots = ir->get_state_slots();
+      for (unsigned i = 0; i < var->num_state_slots; i++) {
+         for (unsigned j = 0; j < 5; j++)
+            var->state_slots[i].tokens[j] = state_slots[i].tokens[j];
+         var->state_slots[i].swizzle = state_slots[i].swizzle;
+      }
+   } else {
+      var->state_slots = NULL;
+   }
+
+   var->constant_initializer = constant_copy(ir->constant_initializer, var);
+
+   var->interface_type = ir->get_interface_type();
+
+   if (var->data.mode == nir_var_local)
+      nir_function_impl_add_variable(impl, var);
+   else
+      nir_shader_add_variable(shader, var);
+
+   _mesa_hash_table_insert(var_table, ir, var);
+   this->var = var;
+}
+
+ir_visitor_status
+nir_function_visitor::visit_enter(ir_function *ir)
+{
+   foreach_in_list(ir_function_signature, sig, &ir->signatures) {
+      visitor->create_function(sig);
+   }
+   return visit_continue_with_parent;
+}
+
+void
+nir_visitor::create_function(ir_function_signature *ir)
+{
+   if (ir->is_intrinsic)
+      return;
+
+   nir_function *func = nir_function_create(shader, ir->function_name());
+
+   unsigned num_params = ir->parameters.length();
+   func->num_params = num_params;
+   func->params = ralloc_array(shader, nir_parameter, num_params);
+
+   unsigned i = 0;
+   foreach_in_list(ir_variable, param, &ir->parameters) {
+      switch (param->data.mode) {
+      case ir_var_function_in:
+         func->params[i].param_type = nir_parameter_in;
+         break;
+
+      case ir_var_function_out:
+         func->params[i].param_type = nir_parameter_out;
+         break;
+
+      case ir_var_function_inout:
+         func->params[i].param_type = nir_parameter_inout;
+         break;
+
+      default:
+         unreachable("not reached");
+      }
+
+      func->params[i].type = param->type;
+      i++;
+   }
+
+   func->return_type = ir->return_type;
+
+   _mesa_hash_table_insert(this->overload_table, ir, func);
+}
+
+void
+nir_visitor::visit(ir_function *ir)
+{
+   foreach_in_list(ir_function_signature, sig, &ir->signatures)
+      sig->accept(this);
+}
+
+void
+nir_visitor::visit(ir_function_signature *ir)
+{
+   if (ir->is_intrinsic)
+      return;
+
+   struct hash_entry *entry =
+      _mesa_hash_table_search(this->overload_table, ir);
+
+   assert(entry);
+   nir_function *func = (nir_function *) entry->data;
+
+   if (ir->is_defined) {
+      nir_function_impl *impl = nir_function_impl_create(func);
+      this->impl = impl;
+
+      unsigned num_params = func->num_params;
+      impl->num_params = num_params;
+      impl->params = ralloc_array(this->shader, nir_variable *, num_params);
+      unsigned i = 0;
+      foreach_in_list(ir_variable, param, &ir->parameters) {
+         param->accept(this);
+         impl->params[i] = this->var;
+         i++;
+      }
+
+      if (func->return_type == glsl_type::void_type) {
+         impl->return_var = NULL;
+      } else {
+         impl->return_var = ralloc(this->shader, nir_variable);
+         impl->return_var->name = ralloc_strdup(impl->return_var,
+                                                "return_var");
+         impl->return_var->type = func->return_type;
+      }
+
+      this->is_global = false;
+
+      nir_builder_init(&b, impl);
+      b.cursor = nir_after_cf_list(&impl->body);
+      visit_exec_list(&ir->body, this);
+
+      this->is_global = true;
+   } else {
+      func->impl = NULL;
+   }
+}
+
+void
+nir_visitor::visit(ir_loop *ir)
+{
+   nir_loop *loop = nir_loop_create(this->shader);
+   nir_builder_cf_insert(&b, &loop->cf_node);
+
+   b.cursor = nir_after_cf_list(&loop->body);
+   visit_exec_list(&ir->body_instructions, this);
+   b.cursor = nir_after_cf_node(&loop->cf_node);
+}
+
+void
+nir_visitor::visit(ir_if *ir)
+{
+   nir_src condition =
+      nir_src_for_ssa(evaluate_rvalue(ir->condition));
+
+   nir_if *if_stmt = nir_if_create(this->shader);
+   if_stmt->condition = condition;
+   nir_builder_cf_insert(&b, &if_stmt->cf_node);
+
+   b.cursor = nir_after_cf_list(&if_stmt->then_list);
+   visit_exec_list(&ir->then_instructions, this);
+
+   b.cursor = nir_after_cf_list(&if_stmt->else_list);
+   visit_exec_list(&ir->else_instructions, this);
+
+   b.cursor = nir_after_cf_node(&if_stmt->cf_node);
+}
+
+void
+nir_visitor::visit(ir_discard *ir)
+{
+   /*
+    * discards aren't treated as control flow, because before we lower them
+    * they can appear anywhere in the shader and the stuff after them may still
+    * be executed (yay, crazy GLSL rules!). However, after lowering, all the
+    * discards will be immediately followed by a return.
+    */
+
+   nir_intrinsic_instr *discard;
+   if (ir->condition) {
+      discard = nir_intrinsic_instr_create(this->shader,
+                                           nir_intrinsic_discard_if);
+      discard->src[0] =
+         nir_src_for_ssa(evaluate_rvalue(ir->condition));
+   } else {
+      discard = nir_intrinsic_instr_create(this->shader, nir_intrinsic_discard);
+   }
+
+   nir_builder_instr_insert(&b, &discard->instr);
+}
+
+void
+nir_visitor::visit(ir_emit_vertex *ir)
+{
+   nir_intrinsic_instr *instr =
+      nir_intrinsic_instr_create(this->shader, nir_intrinsic_emit_vertex);
+   instr->const_index[0] = ir->stream_id();
+   nir_builder_instr_insert(&b, &instr->instr);
+}
+
+void
+nir_visitor::visit(ir_end_primitive *ir)
+{
+   nir_intrinsic_instr *instr =
+      nir_intrinsic_instr_create(this->shader, nir_intrinsic_end_primitive);
+   instr->const_index[0] = ir->stream_id();
+   nir_builder_instr_insert(&b, &instr->instr);
+}
+
+void
+nir_visitor::visit(ir_loop_jump *ir)
+{
+   nir_jump_type type;
+   switch (ir->mode) {
+   case ir_loop_jump::jump_break:
+      type = nir_jump_break;
+      break;
+   case ir_loop_jump::jump_continue:
+      type = nir_jump_continue;
+      break;
+   default:
+      unreachable("not reached");
+   }
+
+   nir_jump_instr *instr = nir_jump_instr_create(this->shader, type);
+   nir_builder_instr_insert(&b, &instr->instr);
+}
+
+void
+nir_visitor::visit(ir_return *ir)
+{
+   if (ir->value != NULL) {
+      nir_intrinsic_instr *copy =
+         nir_intrinsic_instr_create(this->shader, nir_intrinsic_copy_var);
+
+      copy->variables[0] = nir_deref_var_create(copy, this->impl->return_var);
+      copy->variables[1] = evaluate_deref(&copy->instr, ir->value);
+   }
+
+   nir_jump_instr *instr = nir_jump_instr_create(this->shader, nir_jump_return);
+   nir_builder_instr_insert(&b, &instr->instr);
+}
+
+void
+nir_visitor::visit(ir_call *ir)
+{
+   if (ir->callee->is_intrinsic) {
+      nir_intrinsic_op op;
+      if (strcmp(ir->callee_name(), "__intrinsic_atomic_read") == 0) {
+         op = nir_intrinsic_atomic_counter_read_var;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_increment") == 0) {
+         op = nir_intrinsic_atomic_counter_inc_var;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_predecrement") == 0) {
+         op = nir_intrinsic_atomic_counter_dec_var;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_image_load") == 0) {
+         op = nir_intrinsic_image_load;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_image_store") == 0) {
+         op = nir_intrinsic_image_store;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_add") == 0) {
+         op = nir_intrinsic_image_atomic_add;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_min") == 0) {
+         op = nir_intrinsic_image_atomic_min;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_max") == 0) {
+         op = nir_intrinsic_image_atomic_max;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_and") == 0) {
+         op = nir_intrinsic_image_atomic_and;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_or") == 0) {
+         op = nir_intrinsic_image_atomic_or;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_xor") == 0) {
+         op = nir_intrinsic_image_atomic_xor;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_exchange") == 0) {
+         op = nir_intrinsic_image_atomic_exchange;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_image_atomic_comp_swap") == 0) {
+         op = nir_intrinsic_image_atomic_comp_swap;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_memory_barrier") == 0) {
+         op = nir_intrinsic_memory_barrier;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_image_size") == 0) {
+         op = nir_intrinsic_image_size;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_image_samples") == 0) {
+         op = nir_intrinsic_image_samples;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_store_ssbo") == 0) {
+         op = nir_intrinsic_store_ssbo;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_load_ssbo") == 0) {
+         op = nir_intrinsic_load_ssbo;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_add_ssbo") == 0) {
+         op = nir_intrinsic_ssbo_atomic_add;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_and_ssbo") == 0) {
+         op = nir_intrinsic_ssbo_atomic_and;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_or_ssbo") == 0) {
+         op = nir_intrinsic_ssbo_atomic_or;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_xor_ssbo") == 0) {
+         op = nir_intrinsic_ssbo_atomic_xor;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_min_ssbo") == 0) {
+         assert(ir->return_deref);
+         if (ir->return_deref->type == glsl_type::int_type)
+            op = nir_intrinsic_ssbo_atomic_imin;
+         else if (ir->return_deref->type == glsl_type::uint_type)
+            op = nir_intrinsic_ssbo_atomic_umin;
+         else
+            unreachable("Invalid type");
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_max_ssbo") == 0) {
+         assert(ir->return_deref);
+         if (ir->return_deref->type == glsl_type::int_type)
+            op = nir_intrinsic_ssbo_atomic_imax;
+         else if (ir->return_deref->type == glsl_type::uint_type)
+            op = nir_intrinsic_ssbo_atomic_umax;
+         else
+            unreachable("Invalid type");
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_exchange_ssbo") == 0) {
+         op = nir_intrinsic_ssbo_atomic_exchange;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_comp_swap_ssbo") == 0) {
+         op = nir_intrinsic_ssbo_atomic_comp_swap;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_shader_clock") == 0) {
+         op = nir_intrinsic_shader_clock;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_group_memory_barrier") == 0) {
+         op = nir_intrinsic_group_memory_barrier;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_memory_barrier_atomic_counter") == 0) {
+         op = nir_intrinsic_memory_barrier_atomic_counter;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_memory_barrier_buffer") == 0) {
+         op = nir_intrinsic_memory_barrier_buffer;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_memory_barrier_image") == 0) {
+         op = nir_intrinsic_memory_barrier_image;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_memory_barrier_shared") == 0) {
+         op = nir_intrinsic_memory_barrier_shared;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_load_shared") == 0) {
+         op = nir_intrinsic_load_shared;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_store_shared") == 0) {
+         op = nir_intrinsic_store_shared;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_add_shared") == 0) {
+         op = nir_intrinsic_shared_atomic_add;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_and_shared") == 0) {
+         op = nir_intrinsic_shared_atomic_and;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_or_shared") == 0) {
+         op = nir_intrinsic_shared_atomic_or;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_xor_shared") == 0) {
+         op = nir_intrinsic_shared_atomic_xor;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_min_shared") == 0) {
+         assert(ir->return_deref);
+         if (ir->return_deref->type == glsl_type::int_type)
+            op = nir_intrinsic_shared_atomic_imin;
+         else if (ir->return_deref->type == glsl_type::uint_type)
+            op = nir_intrinsic_shared_atomic_umin;
+         else
+            unreachable("Invalid type");
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_max_shared") == 0) {
+         assert(ir->return_deref);
+         if (ir->return_deref->type == glsl_type::int_type)
+            op = nir_intrinsic_shared_atomic_imax;
+         else if (ir->return_deref->type == glsl_type::uint_type)
+            op = nir_intrinsic_shared_atomic_umax;
+         else
+            unreachable("Invalid type");
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_exchange_shared") == 0) {
+         op = nir_intrinsic_shared_atomic_exchange;
+      } else if (strcmp(ir->callee_name(), "__intrinsic_atomic_comp_swap_shared") == 0) {
+         op = nir_intrinsic_shared_atomic_comp_swap;
+      } else {
+         unreachable("not reached");
+      }
+
+      nir_intrinsic_instr *instr = nir_intrinsic_instr_create(shader, op);
+      nir_dest *dest = &instr->dest;
+
+      switch (op) {
+      case nir_intrinsic_atomic_counter_read_var:
+      case nir_intrinsic_atomic_counter_inc_var:
+      case nir_intrinsic_atomic_counter_dec_var: {
+         ir_dereference *param =
+            (ir_dereference *) ir->actual_parameters.get_head();
+         instr->variables[0] = evaluate_deref(&instr->instr, param);
+         nir_ssa_dest_init(&instr->instr, &instr->dest, 1, NULL);
+         nir_builder_instr_insert(&b, &instr->instr);
+         break;
+      }
+      case nir_intrinsic_image_load:
+      case nir_intrinsic_image_store:
+      case nir_intrinsic_image_atomic_add:
+      case nir_intrinsic_image_atomic_min:
+      case nir_intrinsic_image_atomic_max:
+      case nir_intrinsic_image_atomic_and:
+      case nir_intrinsic_image_atomic_or:
+      case nir_intrinsic_image_atomic_xor:
+      case nir_intrinsic_image_atomic_exchange:
+      case nir_intrinsic_image_atomic_comp_swap:
+      case nir_intrinsic_image_samples:
+      case nir_intrinsic_image_size: {
+         nir_ssa_undef_instr *instr_undef =
+            nir_ssa_undef_instr_create(shader, 1);
+         nir_builder_instr_insert(&b, &instr_undef->instr);
+
+         /* Set the image variable dereference. */
+         exec_node *param = ir->actual_parameters.get_head();
+         ir_dereference *image = (ir_dereference *)param;
+         const glsl_type *type =
+            image->variable_referenced()->type->without_array();
+
+         instr->variables[0] = evaluate_deref(&instr->instr, image);
+         param = param->get_next();
+
+         /* Set the intrinsic destination. */
+         if (ir->return_deref) {
+            const nir_intrinsic_info *info =
+                    &nir_intrinsic_infos[instr->intrinsic];
+            nir_ssa_dest_init(&instr->instr, &instr->dest,
+                              info->dest_components, NULL);
+         }
+
+         if (op == nir_intrinsic_image_size ||
+             op == nir_intrinsic_image_samples) {
+            nir_builder_instr_insert(&b, &instr->instr);
+            break;
+         }
+
+         /* Set the address argument, extending the coordinate vector to four
+          * components.
+          */
+         nir_ssa_def *src_addr =
+            evaluate_rvalue((ir_dereference *)param);
+         nir_ssa_def *srcs[4];
+
+         for (int i = 0; i < 4; i++) {
+            if (i < type->coordinate_components())
+               srcs[i] = nir_channel(&b, src_addr, i);
+            else
+               srcs[i] = &instr_undef->def;
+         }
+
+         instr->src[0] = nir_src_for_ssa(nir_vec(&b, srcs, 4));
+         param = param->get_next();
+
+         /* Set the sample argument, which is undefined for single-sample
+          * images.
+          */
+         if (type->sampler_dimensionality == GLSL_SAMPLER_DIM_MS) {
+            instr->src[1] =
+               nir_src_for_ssa(evaluate_rvalue((ir_dereference *)param));
+            param = param->get_next();
+         } else {
+            instr->src[1] = nir_src_for_ssa(&instr_undef->def);
+         }
+
+         /* Set the intrinsic parameters. */
+         if (!param->is_tail_sentinel()) {
+            instr->src[2] =
+               nir_src_for_ssa(evaluate_rvalue((ir_dereference *)param));
+            param = param->get_next();
+         }
+
+         if (!param->is_tail_sentinel()) {
+            instr->src[3] =
+               nir_src_for_ssa(evaluate_rvalue((ir_dereference *)param));
+            param = param->get_next();
+         }
+         nir_builder_instr_insert(&b, &instr->instr);
+         break;
+      }
+      case nir_intrinsic_memory_barrier:
+      case nir_intrinsic_group_memory_barrier:
+      case nir_intrinsic_memory_barrier_atomic_counter:
+      case nir_intrinsic_memory_barrier_buffer:
+      case nir_intrinsic_memory_barrier_image:
+      case nir_intrinsic_memory_barrier_shared:
+         nir_builder_instr_insert(&b, &instr->instr);
+         break;
+      case nir_intrinsic_shader_clock:
+         nir_ssa_dest_init(&instr->instr, &instr->dest, 1, NULL);
+         nir_builder_instr_insert(&b, &instr->instr);
+         break;
+      case nir_intrinsic_store_ssbo: {
+         exec_node *param = ir->actual_parameters.get_head();
+         ir_rvalue *block = ((ir_instruction *)param)->as_rvalue();
+
+         param = param->get_next();
+         ir_rvalue *offset = ((ir_instruction *)param)->as_rvalue();
+
+         param = param->get_next();
+         ir_rvalue *val = ((ir_instruction *)param)->as_rvalue();
+
+         param = param->get_next();
+         ir_constant *write_mask = ((ir_instruction *)param)->as_constant();
+         assert(write_mask);
+
+         instr->src[0] = nir_src_for_ssa(evaluate_rvalue(val));
+         instr->src[1] = nir_src_for_ssa(evaluate_rvalue(block));
+         instr->src[2] = nir_src_for_ssa(evaluate_rvalue(offset));
+         instr->const_index[0] = write_mask->value.u[0];
+         instr->num_components = val->type->vector_elements;
+
+         nir_builder_instr_insert(&b, &instr->instr);
+         break;
+      }
+      case nir_intrinsic_load_ssbo: {
+         exec_node *param = ir->actual_parameters.get_head();
+         ir_rvalue *block = ((ir_instruction *)param)->as_rvalue();
+
+         param = param->get_next();
+         ir_rvalue *offset = ((ir_instruction *)param)->as_rvalue();
+
+         instr->src[0] = nir_src_for_ssa(evaluate_rvalue(block));
+         instr->src[1] = nir_src_for_ssa(evaluate_rvalue(offset));
+
+         const glsl_type *type = ir->return_deref->var->type;
+         instr->num_components = type->vector_elements;
+
+         /* Setup destination register */
+         nir_ssa_dest_init(&instr->instr, &instr->dest,
+                           type->vector_elements, NULL);
+
+         /* Insert the created nir instruction now since in the case of boolean
+          * result we will need to emit another instruction after it
+          */
+         nir_builder_instr_insert(&b, &instr->instr);
+
+         /*
+          * In SSBO/UBO's, a true boolean value is any non-zero value, but we
+          * consider a true boolean to be ~0. Fix this up with a != 0
+          * comparison.
+          */
+         if (type->base_type == GLSL_TYPE_BOOL) {
+            nir_alu_instr *load_ssbo_compare =
+               nir_alu_instr_create(shader, nir_op_ine);
+            load_ssbo_compare->src[0].src.is_ssa = true;
+            load_ssbo_compare->src[0].src.ssa = &instr->dest.ssa;
+            load_ssbo_compare->src[1].src =
+               nir_src_for_ssa(nir_imm_int(&b, 0));
+            for (unsigned i = 0; i < type->vector_elements; i++)
+               load_ssbo_compare->src[1].swizzle[i] = 0;
+            nir_ssa_dest_init(&load_ssbo_compare->instr,
+                              &load_ssbo_compare->dest.dest,
+                              type->vector_elements, NULL);
+            load_ssbo_compare->dest.write_mask = (1 << type->vector_elements) - 1;
+            nir_builder_instr_insert(&b, &load_ssbo_compare->instr);
+            dest = &load_ssbo_compare->dest.dest;
+         }
+         break;
+      }
+      case nir_intrinsic_ssbo_atomic_add:
+      case nir_intrinsic_ssbo_atomic_imin:
+      case nir_intrinsic_ssbo_atomic_umin:
+      case nir_intrinsic_ssbo_atomic_imax:
+      case nir_intrinsic_ssbo_atomic_umax:
+      case nir_intrinsic_ssbo_atomic_and:
+      case nir_intrinsic_ssbo_atomic_or:
+      case nir_intrinsic_ssbo_atomic_xor:
+      case nir_intrinsic_ssbo_atomic_exchange:
+      case nir_intrinsic_ssbo_atomic_comp_swap: {
+         int param_count = ir->actual_parameters.length();
+         assert(param_count == 3 || param_count == 4);
+
+         /* Block index */
+         exec_node *param = ir->actual_parameters.get_head();
+         ir_instruction *inst = (ir_instruction *) param;
+         instr->src[0] = nir_src_for_ssa(evaluate_rvalue(inst->as_rvalue()));
+
+         /* Offset */
+         param = param->get_next();
+         inst = (ir_instruction *) param;
+         instr->src[1] = nir_src_for_ssa(evaluate_rvalue(inst->as_rvalue()));
+
+         /* data1 parameter (this is always present) */
+         param = param->get_next();
+         inst = (ir_instruction *) param;
+         instr->src[2] = nir_src_for_ssa(evaluate_rvalue(inst->as_rvalue()));
+
+         /* data2 parameter (only with atomic_comp_swap) */
+         if (param_count == 4) {
+            assert(op == nir_intrinsic_ssbo_atomic_comp_swap);
+            param = param->get_next();
+            inst = (ir_instruction *) param;
+            instr->src[3] = nir_src_for_ssa(evaluate_rvalue(inst->as_rvalue()));
+         }
+
+         /* Atomic result */
+         assert(ir->return_deref);
+         nir_ssa_dest_init(&instr->instr, &instr->dest,
+                           ir->return_deref->type->vector_elements, NULL);
+         nir_builder_instr_insert(&b, &instr->instr);
+         break;
+      }
+      case nir_intrinsic_load_shared: {
+         exec_node *param = ir->actual_parameters.get_head();
+         ir_rvalue *offset = ((ir_instruction *)param)->as_rvalue();
+
+         instr->const_index[0] = 0;
+         instr->src[0] = nir_src_for_ssa(evaluate_rvalue(offset));
+
+         const glsl_type *type = ir->return_deref->var->type;
+         instr->num_components = type->vector_elements;
+
+         /* Setup destination register */
+         nir_ssa_dest_init(&instr->instr, &instr->dest,
+                           type->vector_elements, NULL);
+
+         nir_builder_instr_insert(&b, &instr->instr);
+         break;
+      }
+      case nir_intrinsic_store_shared: {
+         exec_node *param = ir->actual_parameters.get_head();
+         ir_rvalue *offset = ((ir_instruction *)param)->as_rvalue();
+
+         param = param->get_next();
+         ir_rvalue *val = ((ir_instruction *)param)->as_rvalue();
+
+         param = param->get_next();
+         ir_constant *write_mask = ((ir_instruction *)param)->as_constant();
+         assert(write_mask);
+
+         instr->const_index[0] = 0;
+         instr->src[1] = nir_src_for_ssa(evaluate_rvalue(offset));
+
+         instr->const_index[1] = write_mask->value.u[0];
+
+         instr->src[0] = nir_src_for_ssa(evaluate_rvalue(val));
+         instr->num_components = val->type->vector_elements;
+
+         nir_builder_instr_insert(&b, &instr->instr);
+         break;
+      }
+      case nir_intrinsic_shared_atomic_add:
+      case nir_intrinsic_shared_atomic_imin:
+      case nir_intrinsic_shared_atomic_umin:
+      case nir_intrinsic_shared_atomic_imax:
+      case nir_intrinsic_shared_atomic_umax:
+      case nir_intrinsic_shared_atomic_and:
+      case nir_intrinsic_shared_atomic_or:
+      case nir_intrinsic_shared_atomic_xor:
+      case nir_intrinsic_shared_atomic_exchange:
+      case nir_intrinsic_shared_atomic_comp_swap: {
+         int param_count = ir->actual_parameters.length();
+         assert(param_count == 2 || param_count == 3);
+
+         /* Offset */
+         exec_node *param = ir->actual_parameters.get_head();
+         ir_instruction *inst = (ir_instruction *) param;
+         instr->src[0] = nir_src_for_ssa(evaluate_rvalue(inst->as_rvalue()));
+
+         /* data1 parameter (this is always present) */
+         param = param->get_next();
+         inst = (ir_instruction *) param;
+         instr->src[1] = nir_src_for_ssa(evaluate_rvalue(inst->as_rvalue()));
+
+         /* data2 parameter (only with atomic_comp_swap) */
+         if (param_count == 3) {
+            assert(op == nir_intrinsic_shared_atomic_comp_swap);
+            param = param->get_next();
+            inst = (ir_instruction *) param;
+            instr->src[2] =
+               nir_src_for_ssa(evaluate_rvalue(inst->as_rvalue()));
+         }
+
+         /* Atomic result */
+         assert(ir->return_deref);
+         nir_ssa_dest_init(&instr->instr, &instr->dest,
+                           ir->return_deref->type->vector_elements, NULL);
+         nir_builder_instr_insert(&b, &instr->instr);
+         break;
+      }
+      default:
+         unreachable("not reached");
+      }
+
+      if (ir->return_deref) {
+         nir_intrinsic_instr *store_instr =
+            nir_intrinsic_instr_create(shader, nir_intrinsic_store_var);
+         store_instr->num_components = ir->return_deref->type->vector_elements;
+         store_instr->const_index[0] = (1 << store_instr->num_components) - 1;
+
+         store_instr->variables[0] =
+            evaluate_deref(&store_instr->instr, ir->return_deref);
+         store_instr->src[0] = nir_src_for_ssa(&dest->ssa);
+
+         nir_builder_instr_insert(&b, &store_instr->instr);
+      }
+
+      return;
+   }
+
+   struct hash_entry *entry =
+      _mesa_hash_table_search(this->overload_table, ir->callee);
+   assert(entry);
+   nir_function *callee = (nir_function *) entry->data;
+
+   nir_call_instr *instr = nir_call_instr_create(this->shader, callee);
+
+   unsigned i = 0;
+   foreach_in_list(ir_dereference, param, &ir->actual_parameters) {
+      instr->params[i] = evaluate_deref(&instr->instr, param);
+      i++;
+   }
+
+   instr->return_deref = evaluate_deref(&instr->instr, ir->return_deref);
+   nir_builder_instr_insert(&b, &instr->instr);
+}
+
+void
+nir_visitor::visit(ir_assignment *ir)
+{
+   unsigned num_components = ir->lhs->type->vector_elements;
+
+   if ((ir->rhs->as_dereference() || ir->rhs->as_constant()) &&
+       (ir->write_mask == (1 << num_components) - 1 || ir->write_mask == 0)) {
+      /* We're doing a plain-as-can-be copy, so emit a copy_var */
+      nir_intrinsic_instr *copy =
+         nir_intrinsic_instr_create(this->shader, nir_intrinsic_copy_var);
+
+      copy->variables[0] = evaluate_deref(&copy->instr, ir->lhs);
+      copy->variables[1] = evaluate_deref(&copy->instr, ir->rhs);
+
+      if (ir->condition) {
+         nir_if *if_stmt = nir_if_create(this->shader);
+         if_stmt->condition = nir_src_for_ssa(evaluate_rvalue(ir->condition));
+         nir_builder_cf_insert(&b, &if_stmt->cf_node);
+         nir_instr_insert_after_cf_list(&if_stmt->then_list, &copy->instr);
+         b.cursor = nir_after_cf_node(&if_stmt->cf_node);
+      } else {
+         nir_builder_instr_insert(&b, &copy->instr);
+      }
+      return;
+   }
+
+   assert(ir->rhs->type->is_scalar() || ir->rhs->type->is_vector());
+
+   ir->lhs->accept(this);
+   nir_deref_var *lhs_deref = this->deref_head;
+   nir_ssa_def *src = evaluate_rvalue(ir->rhs);
+
+   if (ir->write_mask != (1 << num_components) - 1 && ir->write_mask != 0) {
+      /* GLSL IR will give us the input to the write-masked assignment in a
+       * single packed vector.  So, for example, if the writemask is xzw, then
+       * we have to swizzle x -> x, y -> z, and z -> w and get the y component
+       * from the load.
+       */
+      unsigned swiz[4];
+      unsigned component = 0;
+      for (unsigned i = 0; i < 4; i++) {
+         swiz[i] = ir->write_mask & (1 << i) ? component++ : 0;
+      }
+      src = nir_swizzle(&b, src, swiz, num_components, !supports_ints);
+   }
+
+   nir_intrinsic_instr *store =
+      nir_intrinsic_instr_create(this->shader, nir_intrinsic_store_var);
+   store->num_components = ir->lhs->type->vector_elements;
+   store->const_index[0] = ir->write_mask;
+   nir_deref *store_deref = nir_copy_deref(store, &lhs_deref->deref);
+   store->variables[0] = nir_deref_as_var(store_deref);
+   store->src[0] = nir_src_for_ssa(src);
+
+   if (ir->condition) {
+      nir_if *if_stmt = nir_if_create(this->shader);
+      if_stmt->condition = nir_src_for_ssa(evaluate_rvalue(ir->condition));
+      nir_builder_cf_insert(&b, &if_stmt->cf_node);
+      nir_instr_insert_after_cf_list(&if_stmt->then_list, &store->instr);
+      b.cursor = nir_after_cf_node(&if_stmt->cf_node);
+   } else {
+      nir_builder_instr_insert(&b, &store->instr);
+   }
+}
+
+/*
+ * Given an instruction, returns a pointer to its destination or NULL if there
+ * is no destination.
+ *
+ * Note that this only handles instructions we generate at this level.
+ */
+static nir_dest *
+get_instr_dest(nir_instr *instr)
+{
+   nir_alu_instr *alu_instr;
+   nir_intrinsic_instr *intrinsic_instr;
+   nir_tex_instr *tex_instr;
+
+   switch (instr->type) {
+      case nir_instr_type_alu:
+         alu_instr = nir_instr_as_alu(instr);
+         return &alu_instr->dest.dest;
+
+      case nir_instr_type_intrinsic:
+         intrinsic_instr = nir_instr_as_intrinsic(instr);
+         if (nir_intrinsic_infos[intrinsic_instr->intrinsic].has_dest)
+            return &intrinsic_instr->dest;
+         else
+            return NULL;
+
+      case nir_instr_type_tex:
+         tex_instr = nir_instr_as_tex(instr);
+         return &tex_instr->dest;
+
+      default:
+         unreachable("not reached");
+   }
+
+   return NULL;
+}
+
+void
+nir_visitor::add_instr(nir_instr *instr, unsigned num_components)
+{
+   nir_dest *dest = get_instr_dest(instr);
+
+   if (dest)
+      nir_ssa_dest_init(instr, dest, num_components, NULL);
+
+   nir_builder_instr_insert(&b, instr);
+
+   if (dest) {
+      assert(dest->is_ssa);
+      this->result = &dest->ssa;
+   }
+}
+
+nir_ssa_def *
+nir_visitor::evaluate_rvalue(ir_rvalue* ir)
+{
+   ir->accept(this);
+   if (ir->as_dereference() || ir->as_constant()) {
+      /*
+       * A dereference is being used on the right hand side, which means we
+       * must emit a variable load.
+       */
+
+      nir_intrinsic_instr *load_instr =
+         nir_intrinsic_instr_create(this->shader, nir_intrinsic_load_var);
+      load_instr->num_components = ir->type->vector_elements;
+      load_instr->variables[0] = this->deref_head;
+      ralloc_steal(load_instr, load_instr->variables[0]);
+      add_instr(&load_instr->instr, ir->type->vector_elements);
+   }
+
+   return this->result;
+}
+
+void
+nir_visitor::visit(ir_expression *ir)
+{
+   /* Some special cases */
+   switch (ir->operation) {
+   case ir_binop_ubo_load: {
+      nir_intrinsic_instr *load =
+         nir_intrinsic_instr_create(this->shader, nir_intrinsic_load_ubo);
+      load->num_components = ir->type->vector_elements;
+      load->src[0] = nir_src_for_ssa(evaluate_rvalue(ir->operands[0]));
+      load->src[1] = nir_src_for_ssa(evaluate_rvalue(ir->operands[1]));
+      add_instr(&load->instr, ir->type->vector_elements);
+
+      /*
+       * In UBO's, a true boolean value is any non-zero value, but we consider
+       * a true boolean to be ~0. Fix this up with a != 0 comparison.
+       */
+
+      if (ir->type->base_type == GLSL_TYPE_BOOL)
+         this->result = nir_ine(&b, &load->dest.ssa, nir_imm_int(&b, 0));
+
+      return;
+   }
+
+   case ir_unop_interpolate_at_centroid:
+   case ir_binop_interpolate_at_offset:
+   case ir_binop_interpolate_at_sample: {
+      ir_dereference *deref = ir->operands[0]->as_dereference();
+      ir_swizzle *swizzle = NULL;
+      if (!deref) {
+         /* the api does not allow a swizzle here, but the varying packing code
+          * may have pushed one into here.
+          */
+         swizzle = ir->operands[0]->as_swizzle();
+         assert(swizzle);
+         deref = swizzle->val->as_dereference();
+         assert(deref);
+      }
+
+      deref->accept(this);
+
+      nir_intrinsic_op op;
+      if (this->deref_head->var->data.mode == nir_var_shader_in) {
+         switch (ir->operation) {
+         case ir_unop_interpolate_at_centroid:
+            op = nir_intrinsic_interp_var_at_centroid;
+            break;
+         case ir_binop_interpolate_at_offset:
+            op = nir_intrinsic_interp_var_at_offset;
+            break;
+         case ir_binop_interpolate_at_sample:
+            op = nir_intrinsic_interp_var_at_sample;
+            break;
+         default:
+            unreachable("Invalid interpolation intrinsic");
+         }
+      } else {
+         /* This case can happen if the vertex shader does not write the
+          * given varying.  In this case, the linker will lower it to a
+          * global variable.  Since interpolating a variable makes no
+          * sense, we'll just turn it into a load which will probably
+          * eventually end up as an SSA definition.
+          */
+         assert(this->deref_head->var->data.mode == nir_var_global);
+         op = nir_intrinsic_load_var;
+      }
+
+      nir_intrinsic_instr *intrin = nir_intrinsic_instr_create(shader, op);
+      intrin->num_components = deref->type->vector_elements;
+      intrin->variables[0] = this->deref_head;
+      ralloc_steal(intrin, intrin->variables[0]);
+
+      if (intrin->intrinsic == nir_intrinsic_interp_var_at_offset ||
+          intrin->intrinsic == nir_intrinsic_interp_var_at_sample)
+         intrin->src[0] = nir_src_for_ssa(evaluate_rvalue(ir->operands[1]));
+
+      add_instr(&intrin->instr, deref->type->vector_elements);
+
+      if (swizzle) {
+         unsigned swiz[4] = {
+            swizzle->mask.x, swizzle->mask.y, swizzle->mask.z, swizzle->mask.w
+         };
+
+         result = nir_swizzle(&b, result, swiz,
+                              swizzle->type->vector_elements, false);
+      }
+
+      return;
+   }
+
+   default:
+      break;
+   }
+
+   nir_ssa_def *srcs[4];
+   for (unsigned i = 0; i < ir->get_num_operands(); i++)
+      srcs[i] = evaluate_rvalue(ir->operands[i]);
+
+   glsl_base_type types[4];
+   for (unsigned i = 0; i < ir->get_num_operands(); i++)
+      if (supports_ints)
+         types[i] = ir->operands[i]->type->base_type;
+      else
+         types[i] = GLSL_TYPE_FLOAT;
+
+   glsl_base_type out_type;
+   if (supports_ints)
+      out_type = ir->type->base_type;
+   else
+      out_type = GLSL_TYPE_FLOAT;
+
+   switch (ir->operation) {
+   case ir_unop_bit_not: result = nir_inot(&b, srcs[0]); break;
+   case ir_unop_logic_not:
+      result = supports_ints ? nir_inot(&b, srcs[0]) : nir_fnot(&b, srcs[0]);
+      break;
+   case ir_unop_neg:
+      result = (types[0] == GLSL_TYPE_FLOAT) ? nir_fneg(&b, srcs[0])
+                                             : nir_ineg(&b, srcs[0]);
+      break;
+   case ir_unop_abs:
+      result = (types[0] == GLSL_TYPE_FLOAT) ? nir_fabs(&b, srcs[0])
+                                             : nir_iabs(&b, srcs[0]);
+      break;
+   case ir_unop_saturate:
+      assert(types[0] == GLSL_TYPE_FLOAT);
+      result = nir_fsat(&b, srcs[0]);
+      break;
+   case ir_unop_sign:
+      result = (types[0] == GLSL_TYPE_FLOAT) ? nir_fsign(&b, srcs[0])
+                                             : nir_isign(&b, srcs[0]);
+      break;
+   case ir_unop_rcp:  result = nir_frcp(&b, srcs[0]);  break;
+   case ir_unop_rsq:  result = nir_frsq(&b, srcs[0]);  break;
+   case ir_unop_sqrt: result = nir_fsqrt(&b, srcs[0]); break;
+   case ir_unop_exp:  unreachable("ir_unop_exp should have been lowered");
+   case ir_unop_log:  unreachable("ir_unop_log should have been lowered");
+   case ir_unop_exp2: result = nir_fexp2(&b, srcs[0]); break;
+   case ir_unop_log2: result = nir_flog2(&b, srcs[0]); break;
+   case ir_unop_i2f:
+      result = supports_ints ? nir_i2f(&b, srcs[0]) : nir_fmov(&b, srcs[0]);
+      break;
+   case ir_unop_u2f:
+      result = supports_ints ? nir_u2f(&b, srcs[0]) : nir_fmov(&b, srcs[0]);
+      break;
+   case ir_unop_b2f:
+      result = supports_ints ? nir_b2f(&b, srcs[0]) : nir_fmov(&b, srcs[0]);
+      break;
+   case ir_unop_f2i:  result = nir_f2i(&b, srcs[0]);   break;
+   case ir_unop_f2u:  result = nir_f2u(&b, srcs[0]);   break;
+   case ir_unop_f2b:  result = nir_f2b(&b, srcs[0]);   break;
+   case ir_unop_i2b:  result = nir_i2b(&b, srcs[0]);   break;
+   case ir_unop_b2i:  result = nir_b2i(&b, srcs[0]);   break;
+   case ir_unop_i2u:
+   case ir_unop_u2i:
+   case ir_unop_bitcast_i2f:
+   case ir_unop_bitcast_f2i:
+   case ir_unop_bitcast_u2f:
+   case ir_unop_bitcast_f2u:
+   case ir_unop_subroutine_to_int:
+      /* no-op */
+      result = nir_imov(&b, srcs[0]);
+      break;
+   case ir_unop_trunc: result = nir_ftrunc(&b, srcs[0]); break;
+   case ir_unop_ceil:  result = nir_fceil(&b, srcs[0]); break;
+   case ir_unop_floor: result = nir_ffloor(&b, srcs[0]); break;
+   case ir_unop_fract: result = nir_ffract(&b, srcs[0]); break;
+   case ir_unop_round_even: result = nir_fround_even(&b, srcs[0]); break;
+   case ir_unop_sin:   result = nir_fsin(&b, srcs[0]); break;
+   case ir_unop_cos:   result = nir_fcos(&b, srcs[0]); break;
+   case ir_unop_dFdx:        result = nir_fddx(&b, srcs[0]); break;
+   case ir_unop_dFdy:        result = nir_fddy(&b, srcs[0]); break;
+   case ir_unop_dFdx_fine:   result = nir_fddx_fine(&b, srcs[0]); break;
+   case ir_unop_dFdy_fine:   result = nir_fddy_fine(&b, srcs[0]); break;
+   case ir_unop_dFdx_coarse: result = nir_fddx_coarse(&b, srcs[0]); break;
+   case ir_unop_dFdy_coarse: result = nir_fddy_coarse(&b, srcs[0]); break;
+   case ir_unop_pack_snorm_2x16:
+      result = nir_pack_snorm_2x16(&b, srcs[0]);
+      break;
+   case ir_unop_pack_snorm_4x8:
+      result = nir_pack_snorm_4x8(&b, srcs[0]);
+      break;
+   case ir_unop_pack_unorm_2x16:
+      result = nir_pack_unorm_2x16(&b, srcs[0]);
+      break;
+   case ir_unop_pack_unorm_4x8:
+      result = nir_pack_unorm_4x8(&b, srcs[0]);
+      break;
+   case ir_unop_pack_half_2x16:
+      result = nir_pack_half_2x16(&b, srcs[0]);
+      break;
+   case ir_unop_unpack_snorm_2x16:
+      result = nir_unpack_snorm_2x16(&b, srcs[0]);
+      break;
+   case ir_unop_unpack_snorm_4x8:
+      result = nir_unpack_snorm_4x8(&b, srcs[0]);
+      break;
+   case ir_unop_unpack_unorm_2x16:
+      result = nir_unpack_unorm_2x16(&b, srcs[0]);
+      break;
+   case ir_unop_unpack_unorm_4x8:
+      result = nir_unpack_unorm_4x8(&b, srcs[0]);
+      break;
+   case ir_unop_unpack_half_2x16:
+      result = nir_unpack_half_2x16(&b, srcs[0]);
+      break;
+   case ir_unop_bitfield_reverse:
+      result = nir_bitfield_reverse(&b, srcs[0]);
+      break;
+   case ir_unop_bit_count:
+      result = nir_bit_count(&b, srcs[0]);
+      break;
+   case ir_unop_find_msb:
+      switch (types[0]) {
+      case GLSL_TYPE_UINT:
+         result = nir_ufind_msb(&b, srcs[0]);
+         break;
+      case GLSL_TYPE_INT:
+         result = nir_ifind_msb(&b, srcs[0]);
+         break;
+      default:
+         unreachable("Invalid type for findMSB()");
+      }
+      break;
+   case ir_unop_find_lsb:
+      result = nir_find_lsb(&b, srcs[0]);
+      break;
+
+   case ir_unop_noise:
+      switch (ir->type->vector_elements) {
+      case 1:
+         switch (ir->operands[0]->type->vector_elements) {
+            case 1: result = nir_fnoise1_1(&b, srcs[0]); break;
+            case 2: result = nir_fnoise1_2(&b, srcs[0]); break;
+            case 3: result = nir_fnoise1_3(&b, srcs[0]); break;
+            case 4: result = nir_fnoise1_4(&b, srcs[0]); break;
+            default: unreachable("not reached");
+         }
+         break;
+      case 2:
+         switch (ir->operands[0]->type->vector_elements) {
+            case 1: result = nir_fnoise2_1(&b, srcs[0]); break;
+            case 2: result = nir_fnoise2_2(&b, srcs[0]); break;
+            case 3: result = nir_fnoise2_3(&b, srcs[0]); break;
+            case 4: result = nir_fnoise2_4(&b, srcs[0]); break;
+            default: unreachable("not reached");
+         }
+         break;
+      case 3:
+         switch (ir->operands[0]->type->vector_elements) {
+            case 1: result = nir_fnoise3_1(&b, srcs[0]); break;
+            case 2: result = nir_fnoise3_2(&b, srcs[0]); break;
+            case 3: result = nir_fnoise3_3(&b, srcs[0]); break;
+            case 4: result = nir_fnoise3_4(&b, srcs[0]); break;
+            default: unreachable("not reached");
+         }
+         break;
+      case 4:
+         switch (ir->operands[0]->type->vector_elements) {
+            case 1: result = nir_fnoise4_1(&b, srcs[0]); break;
+            case 2: result = nir_fnoise4_2(&b, srcs[0]); break;
+            case 3: result = nir_fnoise4_3(&b, srcs[0]); break;
+            case 4: result = nir_fnoise4_4(&b, srcs[0]); break;
+            default: unreachable("not reached");
+         }
+         break;
+      default:
+         unreachable("not reached");
+      }
+      break;
+   case ir_unop_get_buffer_size: {
+      nir_intrinsic_instr *load = nir_intrinsic_instr_create(
+         this->shader,
+         nir_intrinsic_get_buffer_size);
+      load->num_components = ir->type->vector_elements;
+      load->src[0] = nir_src_for_ssa(evaluate_rvalue(ir->operands[0]));
+      add_instr(&load->instr, ir->type->vector_elements);
+      return;
+   }
+
+   case ir_binop_add:
+      result = (out_type == GLSL_TYPE_FLOAT) ? nir_fadd(&b, srcs[0], srcs[1])
+                                             : nir_iadd(&b, srcs[0], srcs[1]);
+      break;
+   case ir_binop_sub:
+      result = (out_type == GLSL_TYPE_FLOAT) ? nir_fsub(&b, srcs[0], srcs[1])
+                                             : nir_isub(&b, srcs[0], srcs[1]);
+      break;
+   case ir_binop_mul:
+      result = (out_type == GLSL_TYPE_FLOAT) ? nir_fmul(&b, srcs[0], srcs[1])
+                                             : nir_imul(&b, srcs[0], srcs[1]);
+      break;
+   case ir_binop_div:
+      if (out_type == GLSL_TYPE_FLOAT)
+         result = nir_fdiv(&b, srcs[0], srcs[1]);
+      else if (out_type == GLSL_TYPE_INT)
+         result = nir_idiv(&b, srcs[0], srcs[1]);
+      else
+         result = nir_udiv(&b, srcs[0], srcs[1]);
+      break;
+   case ir_binop_mod:
+      result = (out_type == GLSL_TYPE_FLOAT) ? nir_fmod(&b, srcs[0], srcs[1])
+                                             : nir_umod(&b, srcs[0], srcs[1]);
+      break;
+   case ir_binop_min:
+      if (out_type == GLSL_TYPE_FLOAT)
+         result = nir_fmin(&b, srcs[0], srcs[1]);
+      else if (out_type == GLSL_TYPE_INT)
+         result = nir_imin(&b, srcs[0], srcs[1]);
+      else
+         result = nir_umin(&b, srcs[0], srcs[1]);
+      break;
+   case ir_binop_max:
+      if (out_type == GLSL_TYPE_FLOAT)
+         result = nir_fmax(&b, srcs[0], srcs[1]);
+      else if (out_type == GLSL_TYPE_INT)
+         result = nir_imax(&b, srcs[0], srcs[1]);
+      else
+         result = nir_umax(&b, srcs[0], srcs[1]);
+      break;
+   case ir_binop_pow: result = nir_fpow(&b, srcs[0], srcs[1]); break;
+   case ir_binop_bit_and: result = nir_iand(&b, srcs[0], srcs[1]); break;
+   case ir_binop_bit_or: result = nir_ior(&b, srcs[0], srcs[1]); break;
+   case ir_binop_bit_xor: result = nir_ixor(&b, srcs[0], srcs[1]); break;
+   case ir_binop_logic_and:
+      result = supports_ints ? nir_iand(&b, srcs[0], srcs[1])
+                             : nir_fand(&b, srcs[0], srcs[1]);
+      break;
+   case ir_binop_logic_or:
+      result = supports_ints ? nir_ior(&b, srcs[0], srcs[1])
+                             : nir_for(&b, srcs[0], srcs[1]);
+      break;
+   case ir_binop_logic_xor:
+      result = supports_ints ? nir_ixor(&b, srcs[0], srcs[1])
+                             : nir_fxor(&b, srcs[0], srcs[1]);
+      break;
+   case ir_binop_lshift: result = nir_ishl(&b, srcs[0], srcs[1]); break;
+   case ir_binop_rshift:
+      result = (out_type == GLSL_TYPE_INT) ? nir_ishr(&b, srcs[0], srcs[1])
+                                           : nir_ushr(&b, srcs[0], srcs[1]);
+      break;
+   case ir_binop_imul_high:
+      result = (out_type == GLSL_TYPE_INT) ? nir_imul_high(&b, srcs[0], srcs[1])
+                                           : nir_umul_high(&b, srcs[0], srcs[1]);
+      break;
+   case ir_binop_carry:  result = nir_uadd_carry(&b, srcs[0], srcs[1]);  break;
+   case ir_binop_borrow: result = nir_usub_borrow(&b, srcs[0], srcs[1]); break;
+   case ir_binop_less:
+      if (supports_ints) {
+         if (types[0] == GLSL_TYPE_FLOAT)
+            result = nir_flt(&b, srcs[0], srcs[1]);
+         else if (types[0] == GLSL_TYPE_INT)
+            result = nir_ilt(&b, srcs[0], srcs[1]);
+         else
+            result = nir_ult(&b, srcs[0], srcs[1]);
+      } else {
+         result = nir_slt(&b, srcs[0], srcs[1]);
+      }
+      break;
+   case ir_binop_greater:
+      if (supports_ints) {
+         if (types[0] == GLSL_TYPE_FLOAT)
+            result = nir_flt(&b, srcs[1], srcs[0]);
+         else if (types[0] == GLSL_TYPE_INT)
+            result = nir_ilt(&b, srcs[1], srcs[0]);
+         else
+            result = nir_ult(&b, srcs[1], srcs[0]);
+      } else {
+         result = nir_slt(&b, srcs[1], srcs[0]);
+      }
+      break;
+   case ir_binop_lequal:
+      if (supports_ints) {
+         if (types[0] == GLSL_TYPE_FLOAT)
+            result = nir_fge(&b, srcs[1], srcs[0]);
+         else if (types[0] == GLSL_TYPE_INT)
+            result = nir_ige(&b, srcs[1], srcs[0]);
+         else
+            result = nir_uge(&b, srcs[1], srcs[0]);
+      } else {
+         result = nir_slt(&b, srcs[1], srcs[0]);
+      }
+      break;
+   case ir_binop_gequal:
+      if (supports_ints) {
+         if (types[0] == GLSL_TYPE_FLOAT)
+            result = nir_fge(&b, srcs[0], srcs[1]);
+         else if (types[0] == GLSL_TYPE_INT)
+            result = nir_ige(&b, srcs[0], srcs[1]);
+         else
+            result = nir_uge(&b, srcs[0], srcs[1]);
+      } else {
+         result = nir_slt(&b, srcs[0], srcs[1]);
+      }
+      break;
+   case ir_binop_equal:
+      if (supports_ints) {
+         if (types[0] == GLSL_TYPE_FLOAT)
+            result = nir_feq(&b, srcs[0], srcs[1]);
+         else
+            result = nir_ieq(&b, srcs[0], srcs[1]);
+      } else {
+         result = nir_seq(&b, srcs[0], srcs[1]);
+      }
+      break;
+   case ir_binop_nequal:
+      if (supports_ints) {
+         if (types[0] == GLSL_TYPE_FLOAT)
+            result = nir_fne(&b, srcs[0], srcs[1]);
+         else
+            result = nir_ine(&b, srcs[0], srcs[1]);
+      } else {
+         result = nir_sne(&b, srcs[0], srcs[1]);
+      }
+      break;
+   case ir_binop_all_equal:
+      if (supports_ints) {
+         if (types[0] == GLSL_TYPE_FLOAT) {
+            switch (ir->operands[0]->type->vector_elements) {
+               case 1: result = nir_feq(&b, srcs[0], srcs[1]); break;
+               case 2: result = nir_ball_fequal2(&b, srcs[0], srcs[1]); break;
+               case 3: result = nir_ball_fequal3(&b, srcs[0], srcs[1]); break;
+               case 4: result = nir_ball_fequal4(&b, srcs[0], srcs[1]); break;
+               default:
+                  unreachable("not reached");
+            }
+         } else {
+            switch (ir->operands[0]->type->vector_elements) {
+               case 1: result = nir_ieq(&b, srcs[0], srcs[1]); break;
+               case 2: result = nir_ball_iequal2(&b, srcs[0], srcs[1]); break;
+               case 3: result = nir_ball_iequal3(&b, srcs[0], srcs[1]); break;
+               case 4: result = nir_ball_iequal4(&b, srcs[0], srcs[1]); break;
+               default:
+                  unreachable("not reached");
+            }
+         }
+      } else {
+         switch (ir->operands[0]->type->vector_elements) {
+            case 1: result = nir_seq(&b, srcs[0], srcs[1]); break;
+            case 2: result = nir_fall_equal2(&b, srcs[0], srcs[1]); break;
+            case 3: result = nir_fall_equal3(&b, srcs[0], srcs[1]); break;
+            case 4: result = nir_fall_equal4(&b, srcs[0], srcs[1]); break;
+            default:
+               unreachable("not reached");
+         }
+      }
+      break;
+   case ir_binop_any_nequal:
+      if (supports_ints) {
+         if (types[0] == GLSL_TYPE_FLOAT) {
+            switch (ir->operands[0]->type->vector_elements) {
+               case 1: result = nir_fne(&b, srcs[0], srcs[1]); break;
+               case 2: result = nir_bany_fnequal2(&b, srcs[0], srcs[1]); break;
+               case 3: result = nir_bany_fnequal3(&b, srcs[0], srcs[1]); break;
+               case 4: result = nir_bany_fnequal4(&b, srcs[0], srcs[1]); break;
+               default:
+                  unreachable("not reached");
+            }
+         } else {
+            switch (ir->operands[0]->type->vector_elements) {
+               case 1: result = nir_ine(&b, srcs[0], srcs[1]); break;
+               case 2: result = nir_bany_inequal2(&b, srcs[0], srcs[1]); break;
+               case 3: result = nir_bany_inequal3(&b, srcs[0], srcs[1]); break;
+               case 4: result = nir_bany_inequal4(&b, srcs[0], srcs[1]); break;
+               default:
+                  unreachable("not reached");
+            }
+         }
+      } else {
+         switch (ir->operands[0]->type->vector_elements) {
+            case 1: result = nir_sne(&b, srcs[0], srcs[1]); break;
+            case 2: result = nir_fany_nequal2(&b, srcs[0], srcs[1]); break;
+            case 3: result = nir_fany_nequal3(&b, srcs[0], srcs[1]); break;
+            case 4: result = nir_fany_nequal4(&b, srcs[0], srcs[1]); break;
+            default:
+               unreachable("not reached");
+         }
+      }
+      break;
+   case ir_binop_dot:
+      switch (ir->operands[0]->type->vector_elements) {
+         case 2: result = nir_fdot2(&b, srcs[0], srcs[1]); break;
+         case 3: result = nir_fdot3(&b, srcs[0], srcs[1]); break;
+         case 4: result = nir_fdot4(&b, srcs[0], srcs[1]); break;
+         default:
+            unreachable("not reached");
+      }
+      break;
+
+   case ir_binop_ldexp: result = nir_ldexp(&b, srcs[0], srcs[1]); break;
+   case ir_triop_fma:
+      result = nir_ffma(&b, srcs[0], srcs[1], srcs[2]);
+      break;
+   case ir_triop_lrp:
+      result = nir_flrp(&b, srcs[0], srcs[1], srcs[2]);
+      break;
+   case ir_triop_csel:
+      if (supports_ints)
+         result = nir_bcsel(&b, srcs[0], srcs[1], srcs[2]);
+      else
+         result = nir_fcsel(&b, srcs[0], srcs[1], srcs[2]);
+      break;
+   case ir_triop_bitfield_extract:
+      result = (out_type == GLSL_TYPE_INT) ?
+         nir_ibitfield_extract(&b, srcs[0], srcs[1], srcs[2]) :
+         nir_ubitfield_extract(&b, srcs[0], srcs[1], srcs[2]);
+      break;
+   case ir_quadop_bitfield_insert:
+      result = nir_bitfield_insert(&b, srcs[0], srcs[1], srcs[2], srcs[3]);
+      break;
+   case ir_quadop_vector:
+      result = nir_vec(&b, srcs, ir->type->vector_elements);
+      break;
+
+   default:
+      unreachable("not reached");
+   }
+}
+
+void
+nir_visitor::visit(ir_swizzle *ir)
+{
+   unsigned swizzle[4] = { ir->mask.x, ir->mask.y, ir->mask.z, ir->mask.w };
+   result = nir_swizzle(&b, evaluate_rvalue(ir->val), swizzle,
+                        ir->type->vector_elements, !supports_ints);
+}
+
+void
+nir_visitor::visit(ir_texture *ir)
+{
+   unsigned num_srcs;
+   nir_texop op;
+   switch (ir->op) {
+   case ir_tex:
+      op = nir_texop_tex;
+      num_srcs = 1; /* coordinate */
+      break;
+
+   case ir_txb:
+   case ir_txl:
+      op = (ir->op == ir_txb) ? nir_texop_txb : nir_texop_txl;
+      num_srcs = 2; /* coordinate, bias/lod */
+      break;
+
+   case ir_txd:
+      op = nir_texop_txd; /* coordinate, dPdx, dPdy */
+      num_srcs = 3;
+      break;
+
+   case ir_txf:
+      op = nir_texop_txf;
+      if (ir->lod_info.lod != NULL)
+         num_srcs = 2; /* coordinate, lod */
+      else
+         num_srcs = 1; /* coordinate */
+      break;
+
+   case ir_txf_ms:
+      op = nir_texop_txf_ms;
+      num_srcs = 2; /* coordinate, sample_index */
+      break;
+
+   case ir_txs:
+      op = nir_texop_txs;
+      if (ir->lod_info.lod != NULL)
+         num_srcs = 1; /* lod */
+      else
+         num_srcs = 0;
+      break;
+
+   case ir_lod:
+      op = nir_texop_lod;
+      num_srcs = 1; /* coordinate */
+      break;
+
+   case ir_tg4:
+      op = nir_texop_tg4;
+      num_srcs = 1; /* coordinate */
+      break;
+
+   case ir_query_levels:
+      op = nir_texop_query_levels;
+      num_srcs = 0;
+      break;
+
+   case ir_texture_samples:
+      op = nir_texop_texture_samples;
+      num_srcs = 0;
+      break;
+
+   case ir_samples_identical:
+      op = nir_texop_samples_identical;
+      num_srcs = 1; /* coordinate */
+      break;
+
+   default:
+      unreachable("not reached");
+   }
+
+   if (ir->projector != NULL)
+      num_srcs++;
+   if (ir->shadow_comparitor != NULL)
+      num_srcs++;
+   if (ir->offset != NULL && ir->offset->as_constant() == NULL)
+      num_srcs++;
+
+   nir_tex_instr *instr = nir_tex_instr_create(this->shader, num_srcs);
+
+   instr->op = op;
+   instr->sampler_dim =
+      (glsl_sampler_dim) ir->sampler->type->sampler_dimensionality;
+   instr->is_array = ir->sampler->type->sampler_array;
+   instr->is_shadow = ir->sampler->type->sampler_shadow;
+   if (instr->is_shadow)
+      instr->is_new_style_shadow = (ir->type->vector_elements == 1);
+   switch (ir->type->base_type) {
+   case GLSL_TYPE_FLOAT:
+      instr->dest_type = nir_type_float;
+      break;
+   case GLSL_TYPE_INT:
+      instr->dest_type = nir_type_int;
+      break;
+   case GLSL_TYPE_BOOL:
+   case GLSL_TYPE_UINT:
+      instr->dest_type = nir_type_uint;
+      break;
+   default:
+      unreachable("not reached");
+   }
+
+   instr->sampler = evaluate_deref(&instr->instr, ir->sampler);
+
+   unsigned src_number = 0;
+
+   if (ir->coordinate != NULL) {
+      instr->coord_components = ir->coordinate->type->vector_elements;
+      instr->src[src_number].src =
+         nir_src_for_ssa(evaluate_rvalue(ir->coordinate));
+      instr->src[src_number].src_type = nir_tex_src_coord;
+      src_number++;
+   }
+
+   if (ir->projector != NULL) {
+      instr->src[src_number].src =
+         nir_src_for_ssa(evaluate_rvalue(ir->projector));
+      instr->src[src_number].src_type = nir_tex_src_projector;
+      src_number++;
+   }
+
+   if (ir->shadow_comparitor != NULL) {
+      instr->src[src_number].src =
+         nir_src_for_ssa(evaluate_rvalue(ir->shadow_comparitor));
+      instr->src[src_number].src_type = nir_tex_src_comparitor;
+      src_number++;
+   }
+
+   if (ir->offset != NULL) {
+      /* we don't support multiple offsets yet */
+      assert(ir->offset->type->is_vector() || ir->offset->type->is_scalar());
+
+      ir_constant *const_offset = ir->offset->as_constant();
+      if (const_offset != NULL) {
+         for (unsigned i = 0; i < const_offset->type->vector_elements; i++)
+            instr->const_offset[i] = const_offset->value.i[i];
+      } else {
+         instr->src[src_number].src =
+            nir_src_for_ssa(evaluate_rvalue(ir->offset));
+         instr->src[src_number].src_type = nir_tex_src_offset;
+         src_number++;
+      }
+   }
+
+   switch (ir->op) {
+   case ir_txb:
+      instr->src[src_number].src =
+         nir_src_for_ssa(evaluate_rvalue(ir->lod_info.bias));
+      instr->src[src_number].src_type = nir_tex_src_bias;
+      src_number++;
+      break;
+
+   case ir_txl:
+   case ir_txf:
+   case ir_txs:
+      if (ir->lod_info.lod != NULL) {
+         instr->src[src_number].src =
+            nir_src_for_ssa(evaluate_rvalue(ir->lod_info.lod));
+         instr->src[src_number].src_type = nir_tex_src_lod;
+         src_number++;
+      }
+      break;
+
+   case ir_txd:
+      instr->src[src_number].src =
+         nir_src_for_ssa(evaluate_rvalue(ir->lod_info.grad.dPdx));
+      instr->src[src_number].src_type = nir_tex_src_ddx;
+      src_number++;
+      instr->src[src_number].src =
+         nir_src_for_ssa(evaluate_rvalue(ir->lod_info.grad.dPdy));
+      instr->src[src_number].src_type = nir_tex_src_ddy;
+      src_number++;
+      break;
+
+   case ir_txf_ms:
+      instr->src[src_number].src =
+         nir_src_for_ssa(evaluate_rvalue(ir->lod_info.sample_index));
+      instr->src[src_number].src_type = nir_tex_src_ms_index;
+      src_number++;
+      break;
+
+   case ir_tg4:
+      instr->component = ir->lod_info.component->as_constant()->value.u[0];
+      break;
+
+   default:
+      break;
+   }
+
+   assert(src_number == num_srcs);
+
+   add_instr(&instr->instr, nir_tex_instr_dest_size(instr));
+}
+
+void
+nir_visitor::visit(ir_constant *ir)
+{
+   /*
+    * We don't know if this variable is an an array or struct that gets
+    * dereferenced, so do the safe thing an make it a variable with a
+    * constant initializer and return a dereference.
+    */
+
+   nir_variable *var =
+      nir_local_variable_create(this->impl, ir->type, "const_temp");
+   var->data.read_only = true;
+   var->constant_initializer = constant_copy(ir, var);
+
+   this->deref_head = nir_deref_var_create(this->shader, var);
+   this->deref_tail = &this->deref_head->deref;
+}
+
+void
+nir_visitor::visit(ir_dereference_variable *ir)
+{
+   struct hash_entry *entry =
+      _mesa_hash_table_search(this->var_table, ir->var);
+   assert(entry);
+   nir_variable *var = (nir_variable *) entry->data;
+
+   nir_deref_var *deref = nir_deref_var_create(this->shader, var);
+   this->deref_head = deref;
+   this->deref_tail = &deref->deref;
+}
+
+void
+nir_visitor::visit(ir_dereference_record *ir)
+{
+   ir->record->accept(this);
+
+   int field_index = this->deref_tail->type->field_index(ir->field);
+   assert(field_index >= 0);
+
+   nir_deref_struct *deref = nir_deref_struct_create(this->deref_tail, field_index);
+   deref->deref.type = ir->type;
+   this->deref_tail->child = &deref->deref;
+   this->deref_tail = &deref->deref;
+}
+
+void
+nir_visitor::visit(ir_dereference_array *ir)
+{
+   nir_deref_array *deref = nir_deref_array_create(this->shader);
+   deref->deref.type = ir->type;
+
+   ir_constant *const_index = ir->array_index->as_constant();
+   if (const_index != NULL) {
+      deref->deref_array_type = nir_deref_array_type_direct;
+      deref->base_offset = const_index->value.u[0];
+   } else {
+      deref->deref_array_type = nir_deref_array_type_indirect;
+      deref->indirect =
+         nir_src_for_ssa(evaluate_rvalue(ir->array_index));
+   }
+
+   ir->array->accept(this);
+
+   this->deref_tail->child = &deref->deref;
+   ralloc_steal(this->deref_tail, deref);
+   this->deref_tail = &deref->deref;
+}
+
+void
+nir_visitor::visit(ir_barrier *ir)
+{
+   nir_intrinsic_instr *instr =
+      nir_intrinsic_instr_create(this->shader, nir_intrinsic_barrier);
+   nir_builder_instr_insert(&b, &instr->instr);
+}
diff --git a/src/compiler/nir/glsl_to_nir.h b/src/compiler/nir/glsl_to_nir.h
new file mode 100644
index 00000000000..e3fe9b0246a
--- /dev/null
+++ b/src/compiler/nir/glsl_to_nir.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+#include "compiler/glsl/glsl_parser_extras.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+nir_shader *glsl_to_nir(const struct gl_shader_program *shader_prog,
+                        gl_shader_stage stage,
+                        const nir_shader_compiler_options *options);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/compiler/nir/nir.c b/src/compiler/nir/nir.c
new file mode 100644
index 00000000000..42a53f6f3db
--- /dev/null
+++ b/src/compiler/nir/nir.c
@@ -0,0 +1,1753 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+#include "nir_control_flow_private.h"
+#include <assert.h>
+
+nir_shader *
+nir_shader_create(void *mem_ctx,
+                  gl_shader_stage stage,
+                  const nir_shader_compiler_options *options)
+{
+   nir_shader *shader = ralloc(mem_ctx, nir_shader);
+
+   exec_list_make_empty(&shader->uniforms);
+   exec_list_make_empty(&shader->inputs);
+   exec_list_make_empty(&shader->outputs);
+   exec_list_make_empty(&shader->shared);
+
+   shader->options = options;
+   memset(&shader->info, 0, sizeof(shader->info));
+
+   exec_list_make_empty(&shader->functions);
+   exec_list_make_empty(&shader->registers);
+   exec_list_make_empty(&shader->globals);
+   exec_list_make_empty(&shader->system_values);
+   shader->reg_alloc = 0;
+
+   shader->num_inputs = 0;
+   shader->num_outputs = 0;
+   shader->num_uniforms = 0;
+   shader->num_shared = 0;
+
+   shader->stage = stage;
+
+   return shader;
+}
+
+static nir_register *
+reg_create(void *mem_ctx, struct exec_list *list)
+{
+   nir_register *reg = ralloc(mem_ctx, nir_register);
+
+   list_inithead(&reg->uses);
+   list_inithead(&reg->defs);
+   list_inithead(&reg->if_uses);
+
+   reg->num_components = 0;
+   reg->num_array_elems = 0;
+   reg->is_packed = false;
+   reg->name = NULL;
+
+   exec_list_push_tail(list, &reg->node);
+
+   return reg;
+}
+
+nir_register *
+nir_global_reg_create(nir_shader *shader)
+{
+   nir_register *reg = reg_create(shader, &shader->registers);
+   reg->index = shader->reg_alloc++;
+   reg->is_global = true;
+
+   return reg;
+}
+
+nir_register *
+nir_local_reg_create(nir_function_impl *impl)
+{
+   nir_register *reg = reg_create(ralloc_parent(impl), &impl->registers);
+   reg->index = impl->reg_alloc++;
+   reg->is_global = false;
+
+   return reg;
+}
+
+void
+nir_reg_remove(nir_register *reg)
+{
+   exec_node_remove(&reg->node);
+}
+
+void
+nir_shader_add_variable(nir_shader *shader, nir_variable *var)
+{
+   switch (var->data.mode) {
+   case nir_var_all:
+      assert(!"invalid mode");
+      break;
+
+   case nir_var_local:
+      assert(!"nir_shader_add_variable cannot be used for local variables");
+      break;
+
+   case nir_var_global:
+      exec_list_push_tail(&shader->globals, &var->node);
+      break;
+
+   case nir_var_shader_in:
+      exec_list_push_tail(&shader->inputs, &var->node);
+      break;
+
+   case nir_var_shader_out:
+      exec_list_push_tail(&shader->outputs, &var->node);
+      break;
+
+   case nir_var_uniform:
+   case nir_var_shader_storage:
+      exec_list_push_tail(&shader->uniforms, &var->node);
+      break;
+
+   case nir_var_shared:
+      assert(shader->stage == MESA_SHADER_COMPUTE);
+      exec_list_push_tail(&shader->shared, &var->node);
+      break;
+
+   case nir_var_system_value:
+      exec_list_push_tail(&shader->system_values, &var->node);
+      break;
+   }
+}
+
+nir_variable *
+nir_variable_create(nir_shader *shader, nir_variable_mode mode,
+                    const struct glsl_type *type, const char *name)
+{
+   nir_variable *var = rzalloc(shader, nir_variable);
+   var->name = ralloc_strdup(var, name);
+   var->type = type;
+   var->data.mode = mode;
+
+   if ((mode == nir_var_shader_in && shader->stage != MESA_SHADER_VERTEX) ||
+       (mode == nir_var_shader_out && shader->stage != MESA_SHADER_FRAGMENT))
+      var->data.interpolation = INTERP_QUALIFIER_SMOOTH;
+
+   if (mode == nir_var_shader_in || mode == nir_var_uniform)
+      var->data.read_only = true;
+
+   nir_shader_add_variable(shader, var);
+
+   return var;
+}
+
+nir_variable *
+nir_local_variable_create(nir_function_impl *impl,
+                          const struct glsl_type *type, const char *name)
+{
+   nir_variable *var = rzalloc(impl->function->shader, nir_variable);
+   var->name = ralloc_strdup(var, name);
+   var->type = type;
+   var->data.mode = nir_var_local;
+
+   nir_function_impl_add_variable(impl, var);
+
+   return var;
+}
+
+nir_function *
+nir_function_create(nir_shader *shader, const char *name)
+{
+   nir_function *func = ralloc(shader, nir_function);
+
+   exec_list_push_tail(&shader->functions, &func->node);
+
+   func->name = ralloc_strdup(func, name);
+   func->shader = shader;
+   func->num_params = 0;
+   func->params = NULL;
+   func->return_type = glsl_void_type();
+   func->impl = NULL;
+
+   return func;
+}
+
+void nir_src_copy(nir_src *dest, const nir_src *src, void *mem_ctx)
+{
+   dest->is_ssa = src->is_ssa;
+   if (src->is_ssa) {
+      dest->ssa = src->ssa;
+   } else {
+      dest->reg.base_offset = src->reg.base_offset;
+      dest->reg.reg = src->reg.reg;
+      if (src->reg.indirect) {
+         dest->reg.indirect = ralloc(mem_ctx, nir_src);
+         nir_src_copy(dest->reg.indirect, src->reg.indirect, mem_ctx);
+      } else {
+         dest->reg.indirect = NULL;
+      }
+   }
+}
+
+void nir_dest_copy(nir_dest *dest, const nir_dest *src, nir_instr *instr)
+{
+   /* Copying an SSA definition makes no sense whatsoever. */
+   assert(!src->is_ssa);
+
+   dest->is_ssa = false;
+
+   dest->reg.base_offset = src->reg.base_offset;
+   dest->reg.reg = src->reg.reg;
+   if (src->reg.indirect) {
+      dest->reg.indirect = ralloc(instr, nir_src);
+      nir_src_copy(dest->reg.indirect, src->reg.indirect, instr);
+   } else {
+      dest->reg.indirect = NULL;
+   }
+}
+
+void
+nir_alu_src_copy(nir_alu_src *dest, const nir_alu_src *src,
+                 nir_alu_instr *instr)
+{
+   nir_src_copy(&dest->src, &src->src, &instr->instr);
+   dest->abs = src->abs;
+   dest->negate = src->negate;
+   for (unsigned i = 0; i < 4; i++)
+      dest->swizzle[i] = src->swizzle[i];
+}
+
+void
+nir_alu_dest_copy(nir_alu_dest *dest, const nir_alu_dest *src,
+                  nir_alu_instr *instr)
+{
+   nir_dest_copy(&dest->dest, &src->dest, &instr->instr);
+   dest->write_mask = src->write_mask;
+   dest->saturate = src->saturate;
+}
+
+
+static void
+cf_init(nir_cf_node *node, nir_cf_node_type type)
+{
+   exec_node_init(&node->node);
+   node->parent = NULL;
+   node->type = type;
+}
+
+nir_function_impl *
+nir_function_impl_create_bare(nir_shader *shader)
+{
+   nir_function_impl *impl = ralloc(shader, nir_function_impl);
+
+   impl->function = NULL;
+
+   cf_init(&impl->cf_node, nir_cf_node_function);
+
+   exec_list_make_empty(&impl->body);
+   exec_list_make_empty(&impl->registers);
+   exec_list_make_empty(&impl->locals);
+   impl->num_params = 0;
+   impl->params = NULL;
+   impl->return_var = NULL;
+   impl->reg_alloc = 0;
+   impl->ssa_alloc = 0;
+   impl->valid_metadata = nir_metadata_none;
+
+   /* create start & end blocks */
+   nir_block *start_block = nir_block_create(shader);
+   nir_block *end_block = nir_block_create(shader);
+   start_block->cf_node.parent = &impl->cf_node;
+   end_block->cf_node.parent = &impl->cf_node;
+   impl->end_block = end_block;
+
+   exec_list_push_tail(&impl->body, &start_block->cf_node.node);
+
+   start_block->successors[0] = end_block;
+   _mesa_set_add(end_block->predecessors, start_block);
+   return impl;
+}
+
+nir_function_impl *
+nir_function_impl_create(nir_function *function)
+{
+   assert(function->impl == NULL);
+
+   nir_function_impl *impl = nir_function_impl_create_bare(function->shader);
+
+   function->impl = impl;
+   impl->function = function;
+
+   impl->num_params = function->num_params;
+   impl->params = ralloc_array(function->shader,
+                               nir_variable *, impl->num_params);
+
+   return impl;
+}
+
+nir_block *
+nir_block_create(nir_shader *shader)
+{
+   nir_block *block = ralloc(shader, nir_block);
+
+   cf_init(&block->cf_node, nir_cf_node_block);
+
+   block->successors[0] = block->successors[1] = NULL;
+   block->predecessors = _mesa_set_create(block, _mesa_hash_pointer,
+                                          _mesa_key_pointer_equal);
+   block->imm_dom = NULL;
+   /* XXX maybe it would be worth it to defer allocation?  This
+    * way it doesn't get allocated for shader ref's that never run
+    * nir_calc_dominance?  For example, state-tracker creates an
+    * initial IR, clones that, runs appropriate lowering pass, passes
+    * to driver which does common lowering/opt, and then stores ref
+    * which is later used to do state specific lowering and futher
+    * opt.  Do any of the references not need dominance metadata?
+    */
+   block->dom_frontier = _mesa_set_create(block, _mesa_hash_pointer,
+                                          _mesa_key_pointer_equal);
+
+   exec_list_make_empty(&block->instr_list);
+
+   return block;
+}
+
+static inline void
+src_init(nir_src *src)
+{
+   src->is_ssa = false;
+   src->reg.reg = NULL;
+   src->reg.indirect = NULL;
+   src->reg.base_offset = 0;
+}
+
+nir_if *
+nir_if_create(nir_shader *shader)
+{
+   nir_if *if_stmt = ralloc(shader, nir_if);
+
+   cf_init(&if_stmt->cf_node, nir_cf_node_if);
+   src_init(&if_stmt->condition);
+
+   nir_block *then = nir_block_create(shader);
+   exec_list_make_empty(&if_stmt->then_list);
+   exec_list_push_tail(&if_stmt->then_list, &then->cf_node.node);
+   then->cf_node.parent = &if_stmt->cf_node;
+
+   nir_block *else_stmt = nir_block_create(shader);
+   exec_list_make_empty(&if_stmt->else_list);
+   exec_list_push_tail(&if_stmt->else_list, &else_stmt->cf_node.node);
+   else_stmt->cf_node.parent = &if_stmt->cf_node;
+
+   return if_stmt;
+}
+
+nir_loop *
+nir_loop_create(nir_shader *shader)
+{
+   nir_loop *loop = ralloc(shader, nir_loop);
+
+   cf_init(&loop->cf_node, nir_cf_node_loop);
+
+   nir_block *body = nir_block_create(shader);
+   exec_list_make_empty(&loop->body);
+   exec_list_push_tail(&loop->body, &body->cf_node.node);
+   body->cf_node.parent = &loop->cf_node;
+
+   body->successors[0] = body;
+   _mesa_set_add(body->predecessors, body);
+
+   return loop;
+}
+
+static void
+instr_init(nir_instr *instr, nir_instr_type type)
+{
+   instr->type = type;
+   instr->block = NULL;
+   exec_node_init(&instr->node);
+}
+
+static void
+dest_init(nir_dest *dest)
+{
+   dest->is_ssa = false;
+   dest->reg.reg = NULL;
+   dest->reg.indirect = NULL;
+   dest->reg.base_offset = 0;
+}
+
+static void
+alu_dest_init(nir_alu_dest *dest)
+{
+   dest_init(&dest->dest);
+   dest->saturate = false;
+   dest->write_mask = 0xf;
+}
+
+static void
+alu_src_init(nir_alu_src *src)
+{
+   src_init(&src->src);
+   src->abs = src->negate = false;
+   src->swizzle[0] = 0;
+   src->swizzle[1] = 1;
+   src->swizzle[2] = 2;
+   src->swizzle[3] = 3;
+}
+
+nir_alu_instr *
+nir_alu_instr_create(nir_shader *shader, nir_op op)
+{
+   unsigned num_srcs = nir_op_infos[op].num_inputs;
+   nir_alu_instr *instr =
+      ralloc_size(shader,
+                  sizeof(nir_alu_instr) + num_srcs * sizeof(nir_alu_src));
+
+   instr_init(&instr->instr, nir_instr_type_alu);
+   instr->op = op;
+   alu_dest_init(&instr->dest);
+   for (unsigned i = 0; i < num_srcs; i++)
+      alu_src_init(&instr->src[i]);
+
+   return instr;
+}
+
+nir_jump_instr *
+nir_jump_instr_create(nir_shader *shader, nir_jump_type type)
+{
+   nir_jump_instr *instr = ralloc(shader, nir_jump_instr);
+   instr_init(&instr->instr, nir_instr_type_jump);
+   instr->type = type;
+   return instr;
+}
+
+nir_load_const_instr *
+nir_load_const_instr_create(nir_shader *shader, unsigned num_components)
+{
+   nir_load_const_instr *instr = ralloc(shader, nir_load_const_instr);
+   instr_init(&instr->instr, nir_instr_type_load_const);
+
+   nir_ssa_def_init(&instr->instr, &instr->def, num_components, NULL);
+
+   return instr;
+}
+
+nir_intrinsic_instr *
+nir_intrinsic_instr_create(nir_shader *shader, nir_intrinsic_op op)
+{
+   unsigned num_srcs = nir_intrinsic_infos[op].num_srcs;
+   nir_intrinsic_instr *instr =
+      ralloc_size(shader,
+                  sizeof(nir_intrinsic_instr) + num_srcs * sizeof(nir_src));
+
+   instr_init(&instr->instr, nir_instr_type_intrinsic);
+   instr->intrinsic = op;
+
+   if (nir_intrinsic_infos[op].has_dest)
+      dest_init(&instr->dest);
+
+   for (unsigned i = 0; i < num_srcs; i++)
+      src_init(&instr->src[i]);
+
+   return instr;
+}
+
+nir_call_instr *
+nir_call_instr_create(nir_shader *shader, nir_function *callee)
+{
+   nir_call_instr *instr = ralloc(shader, nir_call_instr);
+   instr_init(&instr->instr, nir_instr_type_call);
+
+   instr->callee = callee;
+   instr->num_params = callee->num_params;
+   instr->params = ralloc_array(instr, nir_deref_var *, instr->num_params);
+   instr->return_deref = NULL;
+
+   return instr;
+}
+
+nir_tex_instr *
+nir_tex_instr_create(nir_shader *shader, unsigned num_srcs)
+{
+   nir_tex_instr *instr = rzalloc(shader, nir_tex_instr);
+   instr_init(&instr->instr, nir_instr_type_tex);
+
+   dest_init(&instr->dest);
+
+   instr->num_srcs = num_srcs;
+   instr->src = ralloc_array(instr, nir_tex_src, num_srcs);
+   for (unsigned i = 0; i < num_srcs; i++)
+      src_init(&instr->src[i].src);
+
+   instr->texture_index = 0;
+   instr->texture_array_size = 0;
+   instr->texture = NULL;
+   instr->sampler_index = 0;
+   instr->sampler = NULL;
+
+   return instr;
+}
+
+nir_phi_instr *
+nir_phi_instr_create(nir_shader *shader)
+{
+   nir_phi_instr *instr = ralloc(shader, nir_phi_instr);
+   instr_init(&instr->instr, nir_instr_type_phi);
+
+   dest_init(&instr->dest);
+   exec_list_make_empty(&instr->srcs);
+   return instr;
+}
+
+nir_parallel_copy_instr *
+nir_parallel_copy_instr_create(nir_shader *shader)
+{
+   nir_parallel_copy_instr *instr = ralloc(shader, nir_parallel_copy_instr);
+   instr_init(&instr->instr, nir_instr_type_parallel_copy);
+
+   exec_list_make_empty(&instr->entries);
+
+   return instr;
+}
+
+nir_ssa_undef_instr *
+nir_ssa_undef_instr_create(nir_shader *shader, unsigned num_components)
+{
+   nir_ssa_undef_instr *instr = ralloc(shader, nir_ssa_undef_instr);
+   instr_init(&instr->instr, nir_instr_type_ssa_undef);
+
+   nir_ssa_def_init(&instr->instr, &instr->def, num_components, NULL);
+
+   return instr;
+}
+
+nir_deref_var *
+nir_deref_var_create(void *mem_ctx, nir_variable *var)
+{
+   nir_deref_var *deref = ralloc(mem_ctx, nir_deref_var);
+   deref->deref.deref_type = nir_deref_type_var;
+   deref->deref.child = NULL;
+   deref->deref.type = var->type;
+   deref->var = var;
+   return deref;
+}
+
+nir_deref_array *
+nir_deref_array_create(void *mem_ctx)
+{
+   nir_deref_array *deref = ralloc(mem_ctx, nir_deref_array);
+   deref->deref.deref_type = nir_deref_type_array;
+   deref->deref.child = NULL;
+   deref->deref_array_type = nir_deref_array_type_direct;
+   src_init(&deref->indirect);
+   deref->base_offset = 0;
+   return deref;
+}
+
+nir_deref_struct *
+nir_deref_struct_create(void *mem_ctx, unsigned field_index)
+{
+   nir_deref_struct *deref = ralloc(mem_ctx, nir_deref_struct);
+   deref->deref.deref_type = nir_deref_type_struct;
+   deref->deref.child = NULL;
+   deref->index = field_index;
+   return deref;
+}
+
+static nir_deref_var *
+copy_deref_var(void *mem_ctx, nir_deref_var *deref)
+{
+   nir_deref_var *ret = nir_deref_var_create(mem_ctx, deref->var);
+   ret->deref.type = deref->deref.type;
+   if (deref->deref.child)
+      ret->deref.child = nir_copy_deref(ret, deref->deref.child);
+   return ret;
+}
+
+static nir_deref_array *
+copy_deref_array(void *mem_ctx, nir_deref_array *deref)
+{
+   nir_deref_array *ret = nir_deref_array_create(mem_ctx);
+   ret->base_offset = deref->base_offset;
+   ret->deref_array_type = deref->deref_array_type;
+   if (deref->deref_array_type == nir_deref_array_type_indirect) {
+      nir_src_copy(&ret->indirect, &deref->indirect, mem_ctx);
+   }
+   ret->deref.type = deref->deref.type;
+   if (deref->deref.child)
+      ret->deref.child = nir_copy_deref(ret, deref->deref.child);
+   return ret;
+}
+
+static nir_deref_struct *
+copy_deref_struct(void *mem_ctx, nir_deref_struct *deref)
+{
+   nir_deref_struct *ret = nir_deref_struct_create(mem_ctx, deref->index);
+   ret->deref.type = deref->deref.type;
+   if (deref->deref.child)
+      ret->deref.child = nir_copy_deref(ret, deref->deref.child);
+   return ret;
+}
+
+nir_deref *
+nir_copy_deref(void *mem_ctx, nir_deref *deref)
+{
+   switch (deref->deref_type) {
+   case nir_deref_type_var:
+      return &copy_deref_var(mem_ctx, nir_deref_as_var(deref))->deref;
+   case nir_deref_type_array:
+      return &copy_deref_array(mem_ctx, nir_deref_as_array(deref))->deref;
+   case nir_deref_type_struct:
+      return &copy_deref_struct(mem_ctx, nir_deref_as_struct(deref))->deref;
+   default:
+      unreachable("Invalid dereference type");
+   }
+
+   return NULL;
+}
+
+/* Returns a load_const instruction that represents the constant
+ * initializer for the given deref chain.  The caller is responsible for
+ * ensuring that there actually is a constant initializer.
+ */
+nir_load_const_instr *
+nir_deref_get_const_initializer_load(nir_shader *shader, nir_deref_var *deref)
+{
+   nir_constant *constant = deref->var->constant_initializer;
+   assert(constant);
+
+   const nir_deref *tail = &deref->deref;
+   unsigned matrix_offset = 0;
+   while (tail->child) {
+      switch (tail->child->deref_type) {
+      case nir_deref_type_array: {
+         nir_deref_array *arr = nir_deref_as_array(tail->child);
+         assert(arr->deref_array_type == nir_deref_array_type_direct);
+         if (glsl_type_is_matrix(tail->type)) {
+            assert(arr->deref.child == NULL);
+            matrix_offset = arr->base_offset;
+         } else {
+            constant = constant->elements[arr->base_offset];
+         }
+         break;
+      }
+
+      case nir_deref_type_struct: {
+         constant = constant->elements[nir_deref_as_struct(tail->child)->index];
+         break;
+      }
+
+      default:
+         unreachable("Invalid deref child type");
+      }
+
+      tail = tail->child;
+   }
+
+   nir_load_const_instr *load =
+      nir_load_const_instr_create(shader, glsl_get_vector_elements(tail->type));
+
+   matrix_offset *= load->def.num_components;
+   for (unsigned i = 0; i < load->def.num_components; i++) {
+      switch (glsl_get_base_type(tail->type)) {
+      case GLSL_TYPE_FLOAT:
+      case GLSL_TYPE_INT:
+      case GLSL_TYPE_UINT:
+         load->value.u[i] = constant->value.u[matrix_offset + i];
+         break;
+      case GLSL_TYPE_BOOL:
+         load->value.u[i] = constant->value.b[matrix_offset + i] ?
+                             NIR_TRUE : NIR_FALSE;
+         break;
+      default:
+         unreachable("Invalid immediate type");
+      }
+   }
+
+   return load;
+}
+
+nir_function_impl *
+nir_cf_node_get_function(nir_cf_node *node)
+{
+   while (node->type != nir_cf_node_function) {
+      node = node->parent;
+   }
+
+   return nir_cf_node_as_function(node);
+}
+
+/* Reduces a cursor by trying to convert everything to after and trying to
+ * go up to block granularity when possible.
+ */
+static nir_cursor
+reduce_cursor(nir_cursor cursor)
+{
+   switch (cursor.option) {
+   case nir_cursor_before_block:
+      if (exec_list_is_empty(&cursor.block->instr_list)) {
+         /* Empty block.  After is as good as before. */
+         cursor.option = nir_cursor_after_block;
+      } else {
+         /* Try to switch to after the previous block if there is one.
+          * (This isn't likely, but it can happen.)
+          */
+         nir_cf_node *prev_node = nir_cf_node_prev(&cursor.block->cf_node);
+         if (prev_node && prev_node->type == nir_cf_node_block) {
+            cursor.block = nir_cf_node_as_block(prev_node);
+            cursor.option = nir_cursor_after_block;
+         }
+      }
+      return cursor;
+
+   case nir_cursor_after_block:
+      return cursor;
+
+   case nir_cursor_before_instr: {
+      nir_instr *prev_instr = nir_instr_prev(cursor.instr);
+      if (prev_instr) {
+         /* Before this instruction is after the previous */
+         cursor.instr = prev_instr;
+         cursor.option = nir_cursor_after_instr;
+      } else {
+         /* No previous instruction.  Switch to before block */
+         cursor.block = cursor.instr->block;
+         cursor.option = nir_cursor_before_block;
+      }
+      return reduce_cursor(cursor);
+   }
+
+   case nir_cursor_after_instr:
+      if (nir_instr_next(cursor.instr) == NULL) {
+         /* This is the last instruction, switch to after block */
+         cursor.option = nir_cursor_after_block;
+         cursor.block = cursor.instr->block;
+      }
+      return cursor;
+
+   default:
+      unreachable("Inavlid cursor option");
+   }
+}
+
+bool
+nir_cursors_equal(nir_cursor a, nir_cursor b)
+{
+   /* Reduced cursors should be unique */
+   a = reduce_cursor(a);
+   b = reduce_cursor(b);
+
+   return a.block == b.block && a.option == b.option;
+}
+
+static bool
+add_use_cb(nir_src *src, void *state)
+{
+   nir_instr *instr = state;
+
+   src->parent_instr = instr;
+   list_addtail(&src->use_link,
+                src->is_ssa ? &src->ssa->uses : &src->reg.reg->uses);
+
+   return true;
+}
+
+static bool
+add_ssa_def_cb(nir_ssa_def *def, void *state)
+{
+   nir_instr *instr = state;
+
+   if (instr->block && def->index == UINT_MAX) {
+      nir_function_impl *impl =
+         nir_cf_node_get_function(&instr->block->cf_node);
+
+      def->index = impl->ssa_alloc++;
+   }
+
+   return true;
+}
+
+static bool
+add_reg_def_cb(nir_dest *dest, void *state)
+{
+   nir_instr *instr = state;
+
+   if (!dest->is_ssa) {
+      dest->reg.parent_instr = instr;
+      list_addtail(&dest->reg.def_link, &dest->reg.reg->defs);
+   }
+
+   return true;
+}
+
+static void
+add_defs_uses(nir_instr *instr)
+{
+   nir_foreach_src(instr, add_use_cb, instr);
+   nir_foreach_dest(instr, add_reg_def_cb, instr);
+   nir_foreach_ssa_def(instr, add_ssa_def_cb, instr);
+}
+
+void
+nir_instr_insert(nir_cursor cursor, nir_instr *instr)
+{
+   switch (cursor.option) {
+   case nir_cursor_before_block:
+      /* Only allow inserting jumps into empty blocks. */
+      if (instr->type == nir_instr_type_jump)
+         assert(exec_list_is_empty(&cursor.block->instr_list));
+
+      instr->block = cursor.block;
+      add_defs_uses(instr);
+      exec_list_push_head(&cursor.block->instr_list, &instr->node);
+      break;
+   case nir_cursor_after_block: {
+      /* Inserting instructions after a jump is illegal. */
+      nir_instr *last = nir_block_last_instr(cursor.block);
+      assert(last == NULL || last->type != nir_instr_type_jump);
+      (void) last;
+
+      instr->block = cursor.block;
+      add_defs_uses(instr);
+      exec_list_push_tail(&cursor.block->instr_list, &instr->node);
+      break;
+   }
+   case nir_cursor_before_instr:
+      assert(instr->type != nir_instr_type_jump);
+      instr->block = cursor.instr->block;
+      add_defs_uses(instr);
+      exec_node_insert_node_before(&cursor.instr->node, &instr->node);
+      break;
+   case nir_cursor_after_instr:
+      /* Inserting instructions after a jump is illegal. */
+      assert(cursor.instr->type != nir_instr_type_jump);
+
+      /* Only allow inserting jumps at the end of the block. */
+      if (instr->type == nir_instr_type_jump)
+         assert(cursor.instr == nir_block_last_instr(cursor.instr->block));
+
+      instr->block = cursor.instr->block;
+      add_defs_uses(instr);
+      exec_node_insert_after(&cursor.instr->node, &instr->node);
+      break;
+   }
+
+   if (instr->type == nir_instr_type_jump)
+      nir_handle_add_jump(instr->block);
+}
+
+static bool
+src_is_valid(const nir_src *src)
+{
+   return src->is_ssa ? (src->ssa != NULL) : (src->reg.reg != NULL);
+}
+
+static bool
+remove_use_cb(nir_src *src, void *state)
+{
+   if (src_is_valid(src))
+      list_del(&src->use_link);
+
+   return true;
+}
+
+static bool
+remove_def_cb(nir_dest *dest, void *state)
+{
+   if (!dest->is_ssa)
+      list_del(&dest->reg.def_link);
+
+   return true;
+}
+
+static void
+remove_defs_uses(nir_instr *instr)
+{
+   nir_foreach_dest(instr, remove_def_cb, instr);
+   nir_foreach_src(instr, remove_use_cb, instr);
+}
+
+void nir_instr_remove(nir_instr *instr)
+{
+   remove_defs_uses(instr);
+   exec_node_remove(&instr->node);
+
+   if (instr->type == nir_instr_type_jump) {
+      nir_jump_instr *jump_instr = nir_instr_as_jump(instr);
+      nir_handle_remove_jump(instr->block, jump_instr->type);
+   }
+}
+
+/*@}*/
+
+void
+nir_index_local_regs(nir_function_impl *impl)
+{
+   unsigned index = 0;
+   foreach_list_typed(nir_register, reg, node, &impl->registers) {
+      reg->index = index++;
+   }
+   impl->reg_alloc = index;
+}
+
+void
+nir_index_global_regs(nir_shader *shader)
+{
+   unsigned index = 0;
+   foreach_list_typed(nir_register, reg, node, &shader->registers) {
+      reg->index = index++;
+   }
+   shader->reg_alloc = index;
+}
+
+static bool
+visit_alu_dest(nir_alu_instr *instr, nir_foreach_dest_cb cb, void *state)
+{
+   return cb(&instr->dest.dest, state);
+}
+
+static bool
+visit_intrinsic_dest(nir_intrinsic_instr *instr, nir_foreach_dest_cb cb,
+                     void *state)
+{
+   if (nir_intrinsic_infos[instr->intrinsic].has_dest)
+      return cb(&instr->dest, state);
+
+   return true;
+}
+
+static bool
+visit_texture_dest(nir_tex_instr *instr, nir_foreach_dest_cb cb,
+                   void *state)
+{
+   return cb(&instr->dest, state);
+}
+
+static bool
+visit_phi_dest(nir_phi_instr *instr, nir_foreach_dest_cb cb, void *state)
+{
+   return cb(&instr->dest, state);
+}
+
+static bool
+visit_parallel_copy_dest(nir_parallel_copy_instr *instr,
+                         nir_foreach_dest_cb cb, void *state)
+{
+   nir_foreach_parallel_copy_entry(instr, entry) {
+      if (!cb(&entry->dest, state))
+         return false;
+   }
+
+   return true;
+}
+
+bool
+nir_foreach_dest(nir_instr *instr, nir_foreach_dest_cb cb, void *state)
+{
+   switch (instr->type) {
+   case nir_instr_type_alu:
+      return visit_alu_dest(nir_instr_as_alu(instr), cb, state);
+   case nir_instr_type_intrinsic:
+      return visit_intrinsic_dest(nir_instr_as_intrinsic(instr), cb, state);
+   case nir_instr_type_tex:
+      return visit_texture_dest(nir_instr_as_tex(instr), cb, state);
+   case nir_instr_type_phi:
+      return visit_phi_dest(nir_instr_as_phi(instr), cb, state);
+   case nir_instr_type_parallel_copy:
+      return visit_parallel_copy_dest(nir_instr_as_parallel_copy(instr),
+                                      cb, state);
+
+   case nir_instr_type_load_const:
+   case nir_instr_type_ssa_undef:
+   case nir_instr_type_call:
+   case nir_instr_type_jump:
+      break;
+
+   default:
+      unreachable("Invalid instruction type");
+      break;
+   }
+
+   return true;
+}
+
+struct foreach_ssa_def_state {
+   nir_foreach_ssa_def_cb cb;
+   void *client_state;
+};
+
+static inline bool
+nir_ssa_def_visitor(nir_dest *dest, void *void_state)
+{
+   struct foreach_ssa_def_state *state = void_state;
+
+   if (dest->is_ssa)
+      return state->cb(&dest->ssa, state->client_state);
+   else
+      return true;
+}
+
+bool
+nir_foreach_ssa_def(nir_instr *instr, nir_foreach_ssa_def_cb cb, void *state)
+{
+   switch (instr->type) {
+   case nir_instr_type_alu:
+   case nir_instr_type_tex:
+   case nir_instr_type_intrinsic:
+   case nir_instr_type_phi:
+   case nir_instr_type_parallel_copy: {
+      struct foreach_ssa_def_state foreach_state = {cb, state};
+      return nir_foreach_dest(instr, nir_ssa_def_visitor, &foreach_state);
+   }
+
+   case nir_instr_type_load_const:
+      return cb(&nir_instr_as_load_const(instr)->def, state);
+   case nir_instr_type_ssa_undef:
+      return cb(&nir_instr_as_ssa_undef(instr)->def, state);
+   case nir_instr_type_call:
+   case nir_instr_type_jump:
+      return true;
+   default:
+      unreachable("Invalid instruction type");
+   }
+}
+
+static bool
+visit_src(nir_src *src, nir_foreach_src_cb cb, void *state)
+{
+   if (!cb(src, state))
+      return false;
+   if (!src->is_ssa && src->reg.indirect)
+      return cb(src->reg.indirect, state);
+   return true;
+}
+
+static bool
+visit_deref_array_src(nir_deref_array *deref, nir_foreach_src_cb cb,
+                      void *state)
+{
+   if (deref->deref_array_type == nir_deref_array_type_indirect)
+      return visit_src(&deref->indirect, cb, state);
+   return true;
+}
+
+static bool
+visit_deref_src(nir_deref_var *deref, nir_foreach_src_cb cb, void *state)
+{
+   nir_deref *cur = &deref->deref;
+   while (cur != NULL) {
+      if (cur->deref_type == nir_deref_type_array)
+         if (!visit_deref_array_src(nir_deref_as_array(cur), cb, state))
+            return false;
+
+      cur = cur->child;
+   }
+
+   return true;
+}
+
+static bool
+visit_alu_src(nir_alu_instr *instr, nir_foreach_src_cb cb, void *state)
+{
+   for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++)
+      if (!visit_src(&instr->src[i].src, cb, state))
+         return false;
+
+   return true;
+}
+
+static bool
+visit_tex_src(nir_tex_instr *instr, nir_foreach_src_cb cb, void *state)
+{
+   for (unsigned i = 0; i < instr->num_srcs; i++)
+      if (!visit_src(&instr->src[i].src, cb, state))
+         return false;
+
+   if (instr->texture != NULL)
+      if (!visit_deref_src(instr->texture, cb, state))
+         return false;
+
+   if (instr->sampler != NULL)
+      if (!visit_deref_src(instr->sampler, cb, state))
+         return false;
+
+   return true;
+}
+
+static bool
+visit_intrinsic_src(nir_intrinsic_instr *instr, nir_foreach_src_cb cb,
+                    void *state)
+{
+   unsigned num_srcs = nir_intrinsic_infos[instr->intrinsic].num_srcs;
+   for (unsigned i = 0; i < num_srcs; i++)
+      if (!visit_src(&instr->src[i], cb, state))
+         return false;
+
+   unsigned num_vars =
+      nir_intrinsic_infos[instr->intrinsic].num_variables;
+   for (unsigned i = 0; i < num_vars; i++)
+      if (!visit_deref_src(instr->variables[i], cb, state))
+         return false;
+
+   return true;
+}
+
+static bool
+visit_call_src(nir_call_instr *instr, nir_foreach_src_cb cb, void *state)
+{
+   return true;
+}
+
+static bool
+visit_load_const_src(nir_load_const_instr *instr, nir_foreach_src_cb cb,
+                     void *state)
+{
+   return true;
+}
+
+static bool
+visit_phi_src(nir_phi_instr *instr, nir_foreach_src_cb cb, void *state)
+{
+   nir_foreach_phi_src(instr, src) {
+      if (!visit_src(&src->src, cb, state))
+         return false;
+   }
+
+   return true;
+}
+
+static bool
+visit_parallel_copy_src(nir_parallel_copy_instr *instr,
+                        nir_foreach_src_cb cb, void *state)
+{
+   nir_foreach_parallel_copy_entry(instr, entry) {
+      if (!visit_src(&entry->src, cb, state))
+         return false;
+   }
+
+   return true;
+}
+
+typedef struct {
+   void *state;
+   nir_foreach_src_cb cb;
+} visit_dest_indirect_state;
+
+static bool
+visit_dest_indirect(nir_dest *dest, void *_state)
+{
+   visit_dest_indirect_state *state = (visit_dest_indirect_state *) _state;
+
+   if (!dest->is_ssa && dest->reg.indirect)
+      return state->cb(dest->reg.indirect, state->state);
+
+   return true;
+}
+
+bool
+nir_foreach_src(nir_instr *instr, nir_foreach_src_cb cb, void *state)
+{
+   switch (instr->type) {
+   case nir_instr_type_alu:
+      if (!visit_alu_src(nir_instr_as_alu(instr), cb, state))
+         return false;
+      break;
+   case nir_instr_type_intrinsic:
+      if (!visit_intrinsic_src(nir_instr_as_intrinsic(instr), cb, state))
+         return false;
+      break;
+   case nir_instr_type_tex:
+      if (!visit_tex_src(nir_instr_as_tex(instr), cb, state))
+         return false;
+      break;
+   case nir_instr_type_call:
+      if (!visit_call_src(nir_instr_as_call(instr), cb, state))
+         return false;
+      break;
+   case nir_instr_type_load_const:
+      if (!visit_load_const_src(nir_instr_as_load_const(instr), cb, state))
+         return false;
+      break;
+   case nir_instr_type_phi:
+      if (!visit_phi_src(nir_instr_as_phi(instr), cb, state))
+         return false;
+      break;
+   case nir_instr_type_parallel_copy:
+      if (!visit_parallel_copy_src(nir_instr_as_parallel_copy(instr),
+                                   cb, state))
+         return false;
+      break;
+   case nir_instr_type_jump:
+   case nir_instr_type_ssa_undef:
+      return true;
+
+   default:
+      unreachable("Invalid instruction type");
+      break;
+   }
+
+   visit_dest_indirect_state dest_state;
+   dest_state.state = state;
+   dest_state.cb = cb;
+   return nir_foreach_dest(instr, visit_dest_indirect, &dest_state);
+}
+
+nir_const_value *
+nir_src_as_const_value(nir_src src)
+{
+   if (!src.is_ssa)
+      return NULL;
+
+   if (src.ssa->parent_instr->type != nir_instr_type_load_const)
+      return NULL;
+
+   nir_load_const_instr *load = nir_instr_as_load_const(src.ssa->parent_instr);
+
+   return &load->value;
+}
+
+/**
+ * Returns true if the source is known to be dynamically uniform. Otherwise it
+ * returns false which means it may or may not be dynamically uniform but it
+ * can't be determined.
+ */
+bool
+nir_src_is_dynamically_uniform(nir_src src)
+{
+   if (!src.is_ssa)
+      return false;
+
+   /* Constants are trivially dynamically uniform */
+   if (src.ssa->parent_instr->type == nir_instr_type_load_const)
+      return true;
+
+   /* As are uniform variables */
+   if (src.ssa->parent_instr->type == nir_instr_type_intrinsic) {
+      nir_intrinsic_instr *intr = nir_instr_as_intrinsic(src.ssa->parent_instr);
+
+      if (intr->intrinsic == nir_intrinsic_load_uniform)
+         return true;
+   }
+
+   /* XXX: this could have many more tests, such as when a sampler function is
+    * called with dynamically uniform arguments.
+    */
+   return false;
+}
+
+static void
+src_remove_all_uses(nir_src *src)
+{
+   for (; src; src = src->is_ssa ? NULL : src->reg.indirect) {
+      if (!src_is_valid(src))
+         continue;
+
+      list_del(&src->use_link);
+   }
+}
+
+static void
+src_add_all_uses(nir_src *src, nir_instr *parent_instr, nir_if *parent_if)
+{
+   for (; src; src = src->is_ssa ? NULL : src->reg.indirect) {
+      if (!src_is_valid(src))
+         continue;
+
+      if (parent_instr) {
+         src->parent_instr = parent_instr;
+         if (src->is_ssa)
+            list_addtail(&src->use_link, &src->ssa->uses);
+         else
+            list_addtail(&src->use_link, &src->reg.reg->uses);
+      } else {
+         assert(parent_if);
+         src->parent_if = parent_if;
+         if (src->is_ssa)
+            list_addtail(&src->use_link, &src->ssa->if_uses);
+         else
+            list_addtail(&src->use_link, &src->reg.reg->if_uses);
+      }
+   }
+}
+
+void
+nir_instr_rewrite_src(nir_instr *instr, nir_src *src, nir_src new_src)
+{
+   assert(!src_is_valid(src) || src->parent_instr == instr);
+
+   src_remove_all_uses(src);
+   *src = new_src;
+   src_add_all_uses(src, instr, NULL);
+}
+
+void
+nir_instr_move_src(nir_instr *dest_instr, nir_src *dest, nir_src *src)
+{
+   assert(!src_is_valid(dest) || dest->parent_instr == dest_instr);
+
+   src_remove_all_uses(dest);
+   src_remove_all_uses(src);
+   *dest = *src;
+   *src = NIR_SRC_INIT;
+   src_add_all_uses(dest, dest_instr, NULL);
+}
+
+void
+nir_if_rewrite_condition(nir_if *if_stmt, nir_src new_src)
+{
+   nir_src *src = &if_stmt->condition;
+   assert(!src_is_valid(src) || src->parent_if == if_stmt);
+
+   src_remove_all_uses(src);
+   *src = new_src;
+   src_add_all_uses(src, NULL, if_stmt);
+}
+
+void
+nir_instr_rewrite_dest(nir_instr *instr, nir_dest *dest, nir_dest new_dest)
+{
+   if (dest->is_ssa) {
+      /* We can only overwrite an SSA destination if it has no uses. */
+      assert(list_empty(&dest->ssa.uses) && list_empty(&dest->ssa.if_uses));
+   } else {
+      list_del(&dest->reg.def_link);
+      if (dest->reg.indirect)
+         src_remove_all_uses(dest->reg.indirect);
+   }
+
+   /* We can't re-write with an SSA def */
+   assert(!new_dest.is_ssa);
+
+   nir_dest_copy(dest, &new_dest, instr);
+
+   dest->reg.parent_instr = instr;
+   list_addtail(&dest->reg.def_link, &new_dest.reg.reg->defs);
+
+   if (dest->reg.indirect)
+      src_add_all_uses(dest->reg.indirect, instr, NULL);
+}
+
+void
+nir_ssa_def_init(nir_instr *instr, nir_ssa_def *def,
+                 unsigned num_components, const char *name)
+{
+   def->name = name;
+   def->parent_instr = instr;
+   list_inithead(&def->uses);
+   list_inithead(&def->if_uses);
+   def->num_components = num_components;
+
+   if (instr->block) {
+      nir_function_impl *impl =
+         nir_cf_node_get_function(&instr->block->cf_node);
+
+      def->index = impl->ssa_alloc++;
+   } else {
+      def->index = UINT_MAX;
+   }
+}
+
+void
+nir_ssa_dest_init(nir_instr *instr, nir_dest *dest,
+                 unsigned num_components, const char *name)
+{
+   dest->is_ssa = true;
+   nir_ssa_def_init(instr, &dest->ssa, num_components, name);
+}
+
+void
+nir_ssa_def_rewrite_uses(nir_ssa_def *def, nir_src new_src)
+{
+   assert(!new_src.is_ssa || def != new_src.ssa);
+
+   nir_foreach_use_safe(def, use_src)
+      nir_instr_rewrite_src(use_src->parent_instr, use_src, new_src);
+
+   nir_foreach_if_use_safe(def, use_src)
+      nir_if_rewrite_condition(use_src->parent_if, new_src);
+}
+
+static bool
+is_instr_between(nir_instr *start, nir_instr *end, nir_instr *between)
+{
+   assert(start->block == end->block);
+
+   if (between->block != start->block)
+      return false;
+
+   /* Search backwards looking for "between" */
+   while (start != end) {
+      if (between == end)
+         return true;
+
+      end = nir_instr_prev(end);
+      assert(end);
+   }
+
+   return false;
+}
+
+/* Replaces all uses of the given SSA def with the given source but only if
+ * the use comes after the after_me instruction.  This can be useful if you
+ * are emitting code to fix up the result of some instruction: you can freely
+ * use the result in that code and then call rewrite_uses_after and pass the
+ * last fixup instruction as after_me and it will replace all of the uses you
+ * want without touching the fixup code.
+ *
+ * This function assumes that after_me is in the same block as
+ * def->parent_instr and that after_me comes after def->parent_instr.
+ */
+void
+nir_ssa_def_rewrite_uses_after(nir_ssa_def *def, nir_src new_src,
+                               nir_instr *after_me)
+{
+   assert(!new_src.is_ssa || def != new_src.ssa);
+
+   nir_foreach_use_safe(def, use_src) {
+      assert(use_src->parent_instr != def->parent_instr);
+      /* Since def already dominates all of its uses, the only way a use can
+       * not be dominated by after_me is if it is between def and after_me in
+       * the instruction list.
+       */
+      if (!is_instr_between(def->parent_instr, after_me, use_src->parent_instr))
+         nir_instr_rewrite_src(use_src->parent_instr, use_src, new_src);
+   }
+
+   nir_foreach_if_use_safe(def, use_src)
+      nir_if_rewrite_condition(use_src->parent_if, new_src);
+}
+
+static bool foreach_cf_node(nir_cf_node *node, nir_foreach_block_cb cb,
+                            bool reverse, void *state);
+
+static inline bool
+foreach_if(nir_if *if_stmt, nir_foreach_block_cb cb, bool reverse, void *state)
+{
+   if (reverse) {
+      foreach_list_typed_reverse_safe(nir_cf_node, node, node,
+                                      &if_stmt->else_list) {
+         if (!foreach_cf_node(node, cb, reverse, state))
+            return false;
+      }
+
+      foreach_list_typed_reverse_safe(nir_cf_node, node, node,
+                                      &if_stmt->then_list) {
+         if (!foreach_cf_node(node, cb, reverse, state))
+            return false;
+      }
+   } else {
+      foreach_list_typed_safe(nir_cf_node, node, node, &if_stmt->then_list) {
+         if (!foreach_cf_node(node, cb, reverse, state))
+            return false;
+      }
+
+      foreach_list_typed_safe(nir_cf_node, node, node, &if_stmt->else_list) {
+         if (!foreach_cf_node(node, cb, reverse, state))
+            return false;
+      }
+   }
+
+   return true;
+}
+
+static inline bool
+foreach_loop(nir_loop *loop, nir_foreach_block_cb cb, bool reverse, void *state)
+{
+   if (reverse) {
+      foreach_list_typed_reverse_safe(nir_cf_node, node, node, &loop->body) {
+         if (!foreach_cf_node(node, cb, reverse, state))
+            return false;
+      }
+   } else {
+      foreach_list_typed_safe(nir_cf_node, node, node, &loop->body) {
+         if (!foreach_cf_node(node, cb, reverse, state))
+            return false;
+      }
+   }
+
+   return true;
+}
+
+static bool
+foreach_cf_node(nir_cf_node *node, nir_foreach_block_cb cb,
+                bool reverse, void *state)
+{
+   switch (node->type) {
+   case nir_cf_node_block:
+      return cb(nir_cf_node_as_block(node), state);
+   case nir_cf_node_if:
+      return foreach_if(nir_cf_node_as_if(node), cb, reverse, state);
+   case nir_cf_node_loop:
+      return foreach_loop(nir_cf_node_as_loop(node), cb, reverse, state);
+      break;
+
+   default:
+      unreachable("Invalid CFG node type");
+      break;
+   }
+
+   return false;
+}
+
+bool
+nir_foreach_block_in_cf_node(nir_cf_node *node, nir_foreach_block_cb cb,
+                             void *state)
+{
+   return foreach_cf_node(node, cb, false, state);
+}
+
+bool
+nir_foreach_block(nir_function_impl *impl, nir_foreach_block_cb cb, void *state)
+{
+   foreach_list_typed_safe(nir_cf_node, node, node, &impl->body) {
+      if (!foreach_cf_node(node, cb, false, state))
+         return false;
+   }
+
+   return cb(impl->end_block, state);
+}
+
+bool
+nir_foreach_block_reverse(nir_function_impl *impl, nir_foreach_block_cb cb,
+                          void *state)
+{
+   if (!cb(impl->end_block, state))
+      return false;
+
+   foreach_list_typed_reverse_safe(nir_cf_node, node, node, &impl->body) {
+      if (!foreach_cf_node(node, cb, true, state))
+         return false;
+   }
+
+   return true;
+}
+
+nir_if *
+nir_block_get_following_if(nir_block *block)
+{
+   if (exec_node_is_tail_sentinel(&block->cf_node.node))
+      return NULL;
+
+   if (nir_cf_node_is_last(&block->cf_node))
+      return NULL;
+
+   nir_cf_node *next_node = nir_cf_node_next(&block->cf_node);
+
+   if (next_node->type != nir_cf_node_if)
+      return NULL;
+
+   return nir_cf_node_as_if(next_node);
+}
+
+nir_loop *
+nir_block_get_following_loop(nir_block *block)
+{
+   if (exec_node_is_tail_sentinel(&block->cf_node.node))
+      return NULL;
+
+   if (nir_cf_node_is_last(&block->cf_node))
+      return NULL;
+
+   nir_cf_node *next_node = nir_cf_node_next(&block->cf_node);
+
+   if (next_node->type != nir_cf_node_loop)
+      return NULL;
+
+   return nir_cf_node_as_loop(next_node);
+}
+static bool
+index_block(nir_block *block, void *state)
+{
+   unsigned *index = state;
+   block->index = (*index)++;
+   return true;
+}
+
+void
+nir_index_blocks(nir_function_impl *impl)
+{
+   unsigned index = 0;
+
+   if (impl->valid_metadata & nir_metadata_block_index)
+      return;
+
+   nir_foreach_block(impl, index_block, &index);
+
+   impl->num_blocks = index;
+}
+
+static bool
+index_ssa_def_cb(nir_ssa_def *def, void *state)
+{
+   unsigned *index = (unsigned *) state;
+   def->index = (*index)++;
+
+   return true;
+}
+
+static bool
+index_ssa_block(nir_block *block, void *state)
+{
+   nir_foreach_instr(block, instr)
+      nir_foreach_ssa_def(instr, index_ssa_def_cb, state);
+
+   return true;
+}
+
+/**
+ * The indices are applied top-to-bottom which has the very nice property
+ * that, if A dominates B, then A->index <= B->index.
+ */
+void
+nir_index_ssa_defs(nir_function_impl *impl)
+{
+   unsigned index = 0;
+   nir_foreach_block(impl, index_ssa_block, &index);
+   impl->ssa_alloc = index;
+}
+
+static bool
+index_instrs_block(nir_block *block, void *state)
+{
+   unsigned *index = state;
+   nir_foreach_instr(block, instr)
+      instr->index = (*index)++;
+
+   return true;
+}
+
+/**
+ * The indices are applied top-to-bottom which has the very nice property
+ * that, if A dominates B, then A->index <= B->index.
+ */
+unsigned
+nir_index_instrs(nir_function_impl *impl)
+{
+   unsigned index = 0;
+   nir_foreach_block(impl, index_instrs_block, &index);
+   return index;
+}
+
+nir_intrinsic_op
+nir_intrinsic_from_system_value(gl_system_value val)
+{
+   switch (val) {
+   case SYSTEM_VALUE_VERTEX_ID:
+      return nir_intrinsic_load_vertex_id;
+   case SYSTEM_VALUE_INSTANCE_ID:
+      return nir_intrinsic_load_instance_id;
+   case SYSTEM_VALUE_DRAW_ID:
+      return nir_intrinsic_load_draw_id;
+   case SYSTEM_VALUE_BASE_INSTANCE:
+      return nir_intrinsic_load_base_instance;
+   case SYSTEM_VALUE_VERTEX_ID_ZERO_BASE:
+      return nir_intrinsic_load_vertex_id_zero_base;
+   case SYSTEM_VALUE_BASE_VERTEX:
+      return nir_intrinsic_load_base_vertex;
+   case SYSTEM_VALUE_INVOCATION_ID:
+      return nir_intrinsic_load_invocation_id;
+   case SYSTEM_VALUE_FRONT_FACE:
+      return nir_intrinsic_load_front_face;
+   case SYSTEM_VALUE_SAMPLE_ID:
+      return nir_intrinsic_load_sample_id;
+   case SYSTEM_VALUE_SAMPLE_POS:
+      return nir_intrinsic_load_sample_pos;
+   case SYSTEM_VALUE_SAMPLE_MASK_IN:
+      return nir_intrinsic_load_sample_mask_in;
+   case SYSTEM_VALUE_LOCAL_INVOCATION_ID:
+      return nir_intrinsic_load_local_invocation_id;
+   case SYSTEM_VALUE_WORK_GROUP_ID:
+      return nir_intrinsic_load_work_group_id;
+   case SYSTEM_VALUE_NUM_WORK_GROUPS:
+      return nir_intrinsic_load_num_work_groups;
+   case SYSTEM_VALUE_PRIMITIVE_ID:
+      return nir_intrinsic_load_primitive_id;
+   case SYSTEM_VALUE_TESS_COORD:
+      return nir_intrinsic_load_tess_coord;
+   case SYSTEM_VALUE_TESS_LEVEL_OUTER:
+      return nir_intrinsic_load_tess_level_outer;
+   case SYSTEM_VALUE_TESS_LEVEL_INNER:
+      return nir_intrinsic_load_tess_level_inner;
+   case SYSTEM_VALUE_VERTICES_IN:
+      return nir_intrinsic_load_patch_vertices_in;
+   case SYSTEM_VALUE_HELPER_INVOCATION:
+      return nir_intrinsic_load_helper_invocation;
+   default:
+      unreachable("system value does not directly correspond to intrinsic");
+   }
+}
+
+gl_system_value
+nir_system_value_from_intrinsic(nir_intrinsic_op intrin)
+{
+   switch (intrin) {
+   case nir_intrinsic_load_vertex_id:
+      return SYSTEM_VALUE_VERTEX_ID;
+   case nir_intrinsic_load_instance_id:
+      return SYSTEM_VALUE_INSTANCE_ID;
+   case nir_intrinsic_load_draw_id:
+      return SYSTEM_VALUE_DRAW_ID;
+   case nir_intrinsic_load_base_instance:
+      return SYSTEM_VALUE_BASE_INSTANCE;
+   case nir_intrinsic_load_vertex_id_zero_base:
+      return SYSTEM_VALUE_VERTEX_ID_ZERO_BASE;
+   case nir_intrinsic_load_base_vertex:
+      return SYSTEM_VALUE_BASE_VERTEX;
+   case nir_intrinsic_load_invocation_id:
+      return SYSTEM_VALUE_INVOCATION_ID;
+   case nir_intrinsic_load_front_face:
+      return SYSTEM_VALUE_FRONT_FACE;
+   case nir_intrinsic_load_sample_id:
+      return SYSTEM_VALUE_SAMPLE_ID;
+   case nir_intrinsic_load_sample_pos:
+      return SYSTEM_VALUE_SAMPLE_POS;
+   case nir_intrinsic_load_sample_mask_in:
+      return SYSTEM_VALUE_SAMPLE_MASK_IN;
+   case nir_intrinsic_load_local_invocation_id:
+      return SYSTEM_VALUE_LOCAL_INVOCATION_ID;
+   case nir_intrinsic_load_num_work_groups:
+      return SYSTEM_VALUE_NUM_WORK_GROUPS;
+   case nir_intrinsic_load_work_group_id:
+      return SYSTEM_VALUE_WORK_GROUP_ID;
+   case nir_intrinsic_load_primitive_id:
+      return SYSTEM_VALUE_PRIMITIVE_ID;
+   case nir_intrinsic_load_tess_coord:
+      return SYSTEM_VALUE_TESS_COORD;
+   case nir_intrinsic_load_tess_level_outer:
+      return SYSTEM_VALUE_TESS_LEVEL_OUTER;
+   case nir_intrinsic_load_tess_level_inner:
+      return SYSTEM_VALUE_TESS_LEVEL_INNER;
+   case nir_intrinsic_load_patch_vertices_in:
+      return SYSTEM_VALUE_VERTICES_IN;
+   case nir_intrinsic_load_helper_invocation:
+      return SYSTEM_VALUE_HELPER_INVOCATION;
+   default:
+      unreachable("intrinsic doesn't produce a system value");
+   }
+}
diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
new file mode 100644
index 00000000000..f130e5e0eb1
--- /dev/null
+++ b/src/compiler/nir/nir.h
@@ -0,0 +1,2239 @@
+/*
+ * Copyright © 2014 Connor Abbott
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#pragma once
+
+#include "util/hash_table.h"
+#include "compiler/glsl/list.h"
+#include "GL/gl.h" /* GLenum */
+#include "util/list.h"
+#include "util/ralloc.h"
+#include "util/set.h"
+#include "util/bitset.h"
+#include "compiler/nir_types.h"
+#include "compiler/shader_enums.h"
+#include <stdio.h>
+
+#include "nir_opcodes.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct gl_program;
+struct gl_shader_program;
+
+#define NIR_FALSE 0u
+#define NIR_TRUE (~0u)
+
+/** Defines a cast function
+ *
+ * This macro defines a cast function from in_type to out_type where
+ * out_type is some structure type that contains a field of type out_type.
+ *
+ * Note that you have to be a bit careful as the generated cast function
+ * destroys constness.
+ */
+#define NIR_DEFINE_CAST(name, in_type, out_type, field)  \
+static inline out_type *                                 \
+name(const in_type *parent)                              \
+{                                                        \
+   return exec_node_data(out_type, parent, field);       \
+}
+
+struct nir_function;
+struct nir_shader;
+struct nir_instr;
+
+
+/**
+ * Description of built-in state associated with a uniform
+ *
+ * \sa nir_variable::state_slots
+ */
+typedef struct {
+   int tokens[5];
+   int swizzle;
+} nir_state_slot;
+
+typedef enum {
+   nir_var_all = -1,
+   nir_var_shader_in,
+   nir_var_shader_out,
+   nir_var_global,
+   nir_var_local,
+   nir_var_uniform,
+   nir_var_shader_storage,
+   nir_var_shared,
+   nir_var_system_value
+} nir_variable_mode;
+
+/**
+ * Data stored in an nir_constant
+ */
+union nir_constant_data {
+   unsigned u[16];
+   int i[16];
+   float f[16];
+   bool b[16];
+};
+
+typedef struct nir_constant {
+   /**
+    * Value of the constant.
+    *
+    * The field used to back the values supplied by the constant is determined
+    * by the type associated with the \c nir_variable.  Constants may be
+    * scalars, vectors, or matrices.
+    */
+   union nir_constant_data value;
+
+   /* we could get this from the var->type but makes clone *much* easier to
+    * not have to care about the type.
+    */
+   unsigned num_elements;
+
+   /* Array elements / Structure Fields */
+   struct nir_constant **elements;
+} nir_constant;
+
+/**
+ * \brief Layout qualifiers for gl_FragDepth.
+ *
+ * The AMD/ARB_conservative_depth extensions allow gl_FragDepth to be redeclared
+ * with a layout qualifier.
+ */
+typedef enum {
+    nir_depth_layout_none, /**< No depth layout is specified. */
+    nir_depth_layout_any,
+    nir_depth_layout_greater,
+    nir_depth_layout_less,
+    nir_depth_layout_unchanged
+} nir_depth_layout;
+
+/**
+ * Either a uniform, global variable, shader input, or shader output. Based on
+ * ir_variable - it should be easy to translate between the two.
+ */
+
+typedef struct nir_variable {
+   struct exec_node node;
+
+   /**
+    * Declared type of the variable
+    */
+   const struct glsl_type *type;
+
+   /**
+    * Declared name of the variable
+    */
+   char *name;
+
+   struct nir_variable_data {
+
+      /**
+       * Is the variable read-only?
+       *
+       * This is set for variables declared as \c const, shader inputs,
+       * and uniforms.
+       */
+      unsigned read_only:1;
+      unsigned centroid:1;
+      unsigned sample:1;
+      unsigned patch:1;
+      unsigned invariant:1;
+
+      /**
+       * Storage class of the variable.
+       *
+       * \sa nir_variable_mode
+       */
+      nir_variable_mode mode:4;
+
+      /**
+       * Interpolation mode for shader inputs / outputs
+       *
+       * \sa glsl_interp_qualifier
+       */
+      unsigned interpolation:2;
+
+      /**
+       * \name ARB_fragment_coord_conventions
+       * @{
+       */
+      unsigned origin_upper_left:1;
+      unsigned pixel_center_integer:1;
+      /*@}*/
+
+      /**
+       * Was the location explicitly set in the shader?
+       *
+       * If the location is explicitly set in the shader, it \b cannot be changed
+       * by the linker or by the API (e.g., calls to \c glBindAttribLocation have
+       * no effect).
+       */
+      unsigned explicit_location:1;
+      unsigned explicit_index:1;
+
+      /**
+       * Was an initial binding explicitly set in the shader?
+       *
+       * If so, constant_initializer contains an integer nir_constant
+       * representing the initial binding point.
+       */
+      unsigned explicit_binding:1;
+
+      /**
+       * Does this variable have an initializer?
+       *
+       * This is used by the linker to cross-validiate initializers of global
+       * variables.
+       */
+      unsigned has_initializer:1;
+
+      /**
+       * If non-zero, then this variable may be packed along with other variables
+       * into a single varying slot, so this offset should be applied when
+       * accessing components.  For example, an offset of 1 means that the x
+       * component of this variable is actually stored in component y of the
+       * location specified by \c location.
+       */
+      unsigned location_frac:2;
+
+      /**
+       * Non-zero if this variable was created by lowering a named interface
+       * block which was not an array.
+       *
+       * Note that this variable and \c from_named_ifc_block_array will never
+       * both be non-zero.
+       */
+      unsigned from_named_ifc_block_nonarray:1;
+
+      /**
+       * Non-zero if this variable was created by lowering a named interface
+       * block which was an array.
+       *
+       * Note that this variable and \c from_named_ifc_block_nonarray will never
+       * both be non-zero.
+       */
+      unsigned from_named_ifc_block_array:1;
+
+      /**
+       * \brief Layout qualifier for gl_FragDepth.
+       *
+       * This is not equal to \c ir_depth_layout_none if and only if this
+       * variable is \c gl_FragDepth and a layout qualifier is specified.
+       */
+      nir_depth_layout depth_layout;
+
+      /**
+       * Storage location of the base of this variable
+       *
+       * The precise meaning of this field depends on the nature of the variable.
+       *
+       *   - Vertex shader input: one of the values from \c gl_vert_attrib.
+       *   - Vertex shader output: one of the values from \c gl_varying_slot.
+       *   - Geometry shader input: one of the values from \c gl_varying_slot.
+       *   - Geometry shader output: one of the values from \c gl_varying_slot.
+       *   - Fragment shader input: one of the values from \c gl_varying_slot.
+       *   - Fragment shader output: one of the values from \c gl_frag_result.
+       *   - Uniforms: Per-stage uniform slot number for default uniform block.
+       *   - Uniforms: Index within the uniform block definition for UBO members.
+       *   - Non-UBO Uniforms: uniform slot number.
+       *   - Other: This field is not currently used.
+       *
+       * If the variable is a uniform, shader input, or shader output, and the
+       * slot has not been assigned, the value will be -1.
+       */
+      int location;
+
+      /**
+       * The actual location of the variable in the IR. Only valid for inputs
+       * and outputs.
+       */
+      unsigned int driver_location;
+
+      /**
+       * output index for dual source blending.
+       */
+      int index;
+
+      /**
+       * Descriptor set binding for sampler or UBO.
+       */
+      int descriptor_set;
+
+      /**
+       * Initial binding point for a sampler or UBO.
+       *
+       * For array types, this represents the binding point for the first element.
+       */
+      int binding;
+
+      /**
+       * Location an atomic counter is stored at.
+       */
+      unsigned offset;
+
+      /**
+       * ARB_shader_image_load_store qualifiers.
+       */
+      struct {
+         bool read_only; /**< "readonly" qualifier. */
+         bool write_only; /**< "writeonly" qualifier. */
+         bool coherent;
+         bool _volatile;
+         bool restrict_flag;
+
+         /** Image internal format if specified explicitly, otherwise GL_NONE. */
+         GLenum format;
+      } image;
+
+      /**
+       * Highest element accessed with a constant expression array index
+       *
+       * Not used for non-array variables.
+       */
+      unsigned max_array_access;
+
+   } data;
+
+   /**
+    * Built-in state that backs this uniform
+    *
+    * Once set at variable creation, \c state_slots must remain invariant.
+    * This is because, ideally, this array would be shared by all clones of
+    * this variable in the IR tree.  In other words, we'd really like for it
+    * to be a fly-weight.
+    *
+    * If the variable is not a uniform, \c num_state_slots will be zero and
+    * \c state_slots will be \c NULL.
+    */
+   /*@{*/
+   unsigned num_state_slots;    /**< Number of state slots used */
+   nir_state_slot *state_slots;  /**< State descriptors. */
+   /*@}*/
+
+   /**
+    * Constant expression assigned in the initializer of the variable
+    */
+   nir_constant *constant_initializer;
+
+   /**
+    * For variables that are in an interface block or are an instance of an
+    * interface block, this is the \c GLSL_TYPE_INTERFACE type for that block.
+    *
+    * \sa ir_variable::location
+    */
+   const struct glsl_type *interface_type;
+} nir_variable;
+
+#define nir_foreach_variable(var, var_list) \
+   foreach_list_typed(nir_variable, var, node, var_list)
+
+/**
+ * Returns the bits in the inputs_read, outputs_written, or
+ * system_values_read bitfield corresponding to this variable.
+ */
+static inline uint64_t
+nir_variable_get_io_mask(nir_variable *var, gl_shader_stage stage)
+{
+   assert(var->data.mode == nir_var_shader_in ||
+          var->data.mode == nir_var_shader_out ||
+          var->data.mode == nir_var_system_value);
+   assert(var->data.location >= 0);
+
+   const struct glsl_type *var_type = var->type;
+   if (stage == MESA_SHADER_GEOMETRY && var->data.mode == nir_var_shader_in) {
+      /* Most geometry shader inputs are per-vertex arrays */
+      if (var->data.location >= VARYING_SLOT_VAR0)
+         assert(glsl_type_is_array(var_type));
+
+      if (glsl_type_is_array(var_type))
+         var_type = glsl_get_array_element(var_type);
+   }
+
+   bool is_vertex_input = (var->data.mode == nir_var_shader_in &&
+                           stage == MESA_SHADER_VERTEX);
+   unsigned slots = glsl_count_attribute_slots(var_type, is_vertex_input);
+   return ((1ull << slots) - 1) << var->data.location;
+}
+
+typedef struct nir_register {
+   struct exec_node node;
+
+   unsigned num_components; /** < number of vector components */
+   unsigned num_array_elems; /** < size of array (0 for no array) */
+
+   /** generic register index. */
+   unsigned index;
+
+   /** only for debug purposes, can be NULL */
+   const char *name;
+
+   /** whether this register is local (per-function) or global (per-shader) */
+   bool is_global;
+
+   /**
+    * If this flag is set to true, then accessing channels >= num_components
+    * is well-defined, and simply spills over to the next array element. This
+    * is useful for backends that can do per-component accessing, in
+    * particular scalar backends. By setting this flag and making
+    * num_components equal to 1, structures can be packed tightly into
+    * registers and then registers can be accessed per-component to get to
+    * each structure member, even if it crosses vec4 boundaries.
+    */
+   bool is_packed;
+
+   /** set of nir_src's where this register is used (read from) */
+   struct list_head uses;
+
+   /** set of nir_dest's where this register is defined (written to) */
+   struct list_head defs;
+
+   /** set of nir_if's where this register is used as a condition */
+   struct list_head if_uses;
+} nir_register;
+
+typedef enum {
+   nir_instr_type_alu,
+   nir_instr_type_call,
+   nir_instr_type_tex,
+   nir_instr_type_intrinsic,
+   nir_instr_type_load_const,
+   nir_instr_type_jump,
+   nir_instr_type_ssa_undef,
+   nir_instr_type_phi,
+   nir_instr_type_parallel_copy,
+} nir_instr_type;
+
+typedef struct nir_instr {
+   struct exec_node node;
+   nir_instr_type type;
+   struct nir_block *block;
+
+   /** generic instruction index. */
+   unsigned index;
+
+   /* A temporary for optimization and analysis passes to use for storing
+    * flags.  For instance, DCE uses this to store the "dead/live" info.
+    */
+   uint8_t pass_flags;
+} nir_instr;
+
+static inline nir_instr *
+nir_instr_next(nir_instr *instr)
+{
+   struct exec_node *next = exec_node_get_next(&instr->node);
+   if (exec_node_is_tail_sentinel(next))
+      return NULL;
+   else
+      return exec_node_data(nir_instr, next, node);
+}
+
+static inline nir_instr *
+nir_instr_prev(nir_instr *instr)
+{
+   struct exec_node *prev = exec_node_get_prev(&instr->node);
+   if (exec_node_is_head_sentinel(prev))
+      return NULL;
+   else
+      return exec_node_data(nir_instr, prev, node);
+}
+
+static inline bool
+nir_instr_is_first(nir_instr *instr)
+{
+   return exec_node_is_head_sentinel(exec_node_get_prev(&instr->node));
+}
+
+static inline bool
+nir_instr_is_last(nir_instr *instr)
+{
+   return exec_node_is_tail_sentinel(exec_node_get_next(&instr->node));
+}
+
+typedef struct nir_ssa_def {
+   /** for debugging only, can be NULL */
+   const char* name;
+
+   /** generic SSA definition index. */
+   unsigned index;
+
+   /** Index into the live_in and live_out bitfields */
+   unsigned live_index;
+
+   nir_instr *parent_instr;
+
+   /** set of nir_instr's where this register is used (read from) */
+   struct list_head uses;
+
+   /** set of nir_if's where this register is used as a condition */
+   struct list_head if_uses;
+
+   uint8_t num_components;
+} nir_ssa_def;
+
+struct nir_src;
+
+typedef struct {
+   nir_register *reg;
+   struct nir_src *indirect; /** < NULL for no indirect offset */
+   unsigned base_offset;
+
+   /* TODO use-def chain goes here */
+} nir_reg_src;
+
+typedef struct {
+   nir_instr *parent_instr;
+   struct list_head def_link;
+
+   nir_register *reg;
+   struct nir_src *indirect; /** < NULL for no indirect offset */
+   unsigned base_offset;
+
+   /* TODO def-use chain goes here */
+} nir_reg_dest;
+
+struct nir_if;
+
+typedef struct nir_src {
+   union {
+      nir_instr *parent_instr;
+      struct nir_if *parent_if;
+   };
+
+   struct list_head use_link;
+
+   union {
+      nir_reg_src reg;
+      nir_ssa_def *ssa;
+   };
+
+   bool is_ssa;
+} nir_src;
+
+#ifdef __cplusplus
+#  define NIR_SRC_INIT nir_src()
+#else
+#  define NIR_SRC_INIT (nir_src) { { NULL } }
+#endif
+
+#define nir_foreach_use(reg_or_ssa_def, src) \
+   list_for_each_entry(nir_src, src, &(reg_or_ssa_def)->uses, use_link)
+
+#define nir_foreach_use_safe(reg_or_ssa_def, src) \
+   list_for_each_entry_safe(nir_src, src, &(reg_or_ssa_def)->uses, use_link)
+
+#define nir_foreach_if_use(reg_or_ssa_def, src) \
+   list_for_each_entry(nir_src, src, &(reg_or_ssa_def)->if_uses, use_link)
+
+#define nir_foreach_if_use_safe(reg_or_ssa_def, src) \
+   list_for_each_entry_safe(nir_src, src, &(reg_or_ssa_def)->if_uses, use_link)
+
+typedef struct {
+   union {
+      nir_reg_dest reg;
+      nir_ssa_def ssa;
+   };
+
+   bool is_ssa;
+} nir_dest;
+
+#ifdef __cplusplus
+#  define NIR_DEST_INIT nir_dest()
+#else
+#  define NIR_DEST_INIT (nir_dest) { { { NULL } } }
+#endif
+
+#define nir_foreach_def(reg, dest) \
+   list_for_each_entry(nir_dest, dest, &(reg)->defs, reg.def_link)
+
+#define nir_foreach_def_safe(reg, dest) \
+   list_for_each_entry_safe(nir_dest, dest, &(reg)->defs, reg.def_link)
+
+static inline nir_src
+nir_src_for_ssa(nir_ssa_def *def)
+{
+   nir_src src = NIR_SRC_INIT;
+
+   src.is_ssa = true;
+   src.ssa = def;
+
+   return src;
+}
+
+static inline nir_src
+nir_src_for_reg(nir_register *reg)
+{
+   nir_src src = NIR_SRC_INIT;
+
+   src.is_ssa = false;
+   src.reg.reg = reg;
+   src.reg.indirect = NULL;
+   src.reg.base_offset = 0;
+
+   return src;
+}
+
+static inline nir_dest
+nir_dest_for_reg(nir_register *reg)
+{
+   nir_dest dest = NIR_DEST_INIT;
+
+   dest.reg.reg = reg;
+
+   return dest;
+}
+
+void nir_src_copy(nir_src *dest, const nir_src *src, void *instr_or_if);
+void nir_dest_copy(nir_dest *dest, const nir_dest *src, nir_instr *instr);
+
+typedef struct {
+   nir_src src;
+
+   /**
+    * \name input modifiers
+    */
+   /*@{*/
+   /**
+    * For inputs interpreted as floating point, flips the sign bit. For
+    * inputs interpreted as integers, performs the two's complement negation.
+    */
+   bool negate;
+
+   /**
+    * Clears the sign bit for floating point values, and computes the integer
+    * absolute value for integers. Note that the negate modifier acts after
+    * the absolute value modifier, therefore if both are set then all inputs
+    * will become negative.
+    */
+   bool abs;
+   /*@}*/
+
+   /**
+    * For each input component, says which component of the register it is
+    * chosen from. Note that which elements of the swizzle are used and which
+    * are ignored are based on the write mask for most opcodes - for example,
+    * a statement like "foo.xzw = bar.zyx" would have a writemask of 1101b and
+    * a swizzle of {2, x, 1, 0} where x means "don't care."
+    */
+   uint8_t swizzle[4];
+} nir_alu_src;
+
+typedef struct {
+   nir_dest dest;
+
+   /**
+    * \name saturate output modifier
+    *
+    * Only valid for opcodes that output floating-point numbers. Clamps the
+    * output to between 0.0 and 1.0 inclusive.
+    */
+
+   bool saturate;
+
+   unsigned write_mask : 4; /* ignored if dest.is_ssa is true */
+} nir_alu_dest;
+
+typedef enum {
+   nir_type_invalid = 0, /* Not a valid type */
+   nir_type_float,
+   nir_type_int,
+   nir_type_uint,
+   nir_type_bool
+} nir_alu_type;
+
+typedef enum {
+   NIR_OP_IS_COMMUTATIVE = (1 << 0),
+   NIR_OP_IS_ASSOCIATIVE = (1 << 1),
+} nir_op_algebraic_property;
+
+typedef struct {
+   const char *name;
+
+   unsigned num_inputs;
+
+   /**
+    * The number of components in the output
+    *
+    * If non-zero, this is the size of the output and input sizes are
+    * explicitly given; swizzle and writemask are still in effect, but if
+    * the output component is masked out, then the input component may
+    * still be in use.
+    *
+    * If zero, the opcode acts in the standard, per-component manner; the
+    * operation is performed on each component (except the ones that are
+    * masked out) with the input being taken from the input swizzle for
+    * that component.
+    *
+    * The size of some of the inputs may be given (i.e. non-zero) even
+    * though output_size is zero; in that case, the inputs with a zero
+    * size act per-component, while the inputs with non-zero size don't.
+    */
+   unsigned output_size;
+
+   /**
+    * The type of vector that the instruction outputs. Note that the
+    * staurate modifier is only allowed on outputs with the float type.
+    */
+
+   nir_alu_type output_type;
+
+   /**
+    * The number of components in each input
+    */
+   unsigned input_sizes[4];
+
+   /**
+    * The type of vector that each input takes. Note that negate and
+    * absolute value are only allowed on inputs with int or float type and
+    * behave differently on the two.
+    */
+   nir_alu_type input_types[4];
+
+   nir_op_algebraic_property algebraic_properties;
+} nir_op_info;
+
+extern const nir_op_info nir_op_infos[nir_num_opcodes];
+
+typedef struct nir_alu_instr {
+   nir_instr instr;
+   nir_op op;
+   nir_alu_dest dest;
+   nir_alu_src src[];
+} nir_alu_instr;
+
+void nir_alu_src_copy(nir_alu_src *dest, const nir_alu_src *src,
+                      nir_alu_instr *instr);
+void nir_alu_dest_copy(nir_alu_dest *dest, const nir_alu_dest *src,
+                       nir_alu_instr *instr);
+
+/* is this source channel used? */
+static inline bool
+nir_alu_instr_channel_used(nir_alu_instr *instr, unsigned src, unsigned channel)
+{
+   if (nir_op_infos[instr->op].input_sizes[src] > 0)
+      return channel < nir_op_infos[instr->op].input_sizes[src];
+
+   return (instr->dest.write_mask >> channel) & 1;
+}
+
+/*
+ * For instructions whose destinations are SSA, get the number of channels
+ * used for a source
+ */
+static inline unsigned
+nir_ssa_alu_instr_src_components(const nir_alu_instr *instr, unsigned src)
+{
+   assert(instr->dest.dest.is_ssa);
+
+   if (nir_op_infos[instr->op].input_sizes[src] > 0)
+      return nir_op_infos[instr->op].input_sizes[src];
+
+   return instr->dest.dest.ssa.num_components;
+}
+
+typedef enum {
+   nir_deref_type_var,
+   nir_deref_type_array,
+   nir_deref_type_struct
+} nir_deref_type;
+
+typedef struct nir_deref {
+   nir_deref_type deref_type;
+   struct nir_deref *child;
+   const struct glsl_type *type;
+} nir_deref;
+
+typedef struct {
+   nir_deref deref;
+
+   nir_variable *var;
+} nir_deref_var;
+
+/* This enum describes how the array is referenced.  If the deref is
+ * direct then the base_offset is used.  If the deref is indirect then then
+ * offset is given by base_offset + indirect.  If the deref is a wildcard
+ * then the deref refers to all of the elements of the array at the same
+ * time.  Wildcard dereferences are only ever allowed in copy_var
+ * intrinsics and the source and destination derefs must have matching
+ * wildcards.
+ */
+typedef enum {
+   nir_deref_array_type_direct,
+   nir_deref_array_type_indirect,
+   nir_deref_array_type_wildcard,
+} nir_deref_array_type;
+
+typedef struct {
+   nir_deref deref;
+
+   nir_deref_array_type deref_array_type;
+   unsigned base_offset;
+   nir_src indirect;
+} nir_deref_array;
+
+typedef struct {
+   nir_deref deref;
+
+   unsigned index;
+} nir_deref_struct;
+
+NIR_DEFINE_CAST(nir_deref_as_var, nir_deref, nir_deref_var, deref)
+NIR_DEFINE_CAST(nir_deref_as_array, nir_deref, nir_deref_array, deref)
+NIR_DEFINE_CAST(nir_deref_as_struct, nir_deref, nir_deref_struct, deref)
+
+/* Returns the last deref in the chain. */
+static inline nir_deref *
+nir_deref_tail(nir_deref *deref)
+{
+   while (deref->child)
+      deref = deref->child;
+   return deref;
+}
+
+typedef struct {
+   nir_instr instr;
+
+   unsigned num_params;
+   nir_deref_var **params;
+   nir_deref_var *return_deref;
+
+   struct nir_function *callee;
+} nir_call_instr;
+
+#define INTRINSIC(name, num_srcs, src_components, has_dest, dest_components, \
+                  num_variables, num_indices, flags) \
+   nir_intrinsic_##name,
+
+#define LAST_INTRINSIC(name) nir_last_intrinsic = nir_intrinsic_##name,
+
+typedef enum {
+#include "nir_intrinsics.h"
+   nir_num_intrinsics = nir_last_intrinsic + 1
+} nir_intrinsic_op;
+
+#undef INTRINSIC
+#undef LAST_INTRINSIC
+
+/** Represents an intrinsic
+ *
+ * An intrinsic is an instruction type for handling things that are
+ * more-or-less regular operations but don't just consume and produce SSA
+ * values like ALU operations do.  Intrinsics are not for things that have
+ * special semantic meaning such as phi nodes and parallel copies.
+ * Examples of intrinsics include variable load/store operations, system
+ * value loads, and the like.  Even though texturing more-or-less falls
+ * under this category, texturing is its own instruction type because
+ * trying to represent texturing with intrinsics would lead to a
+ * combinatorial explosion of intrinsic opcodes.
+ *
+ * By having a single instruction type for handling a lot of different
+ * cases, optimization passes can look for intrinsics and, for the most
+ * part, completely ignore them.  Each intrinsic type also has a few
+ * possible flags that govern whether or not they can be reordered or
+ * eliminated.  That way passes like dead code elimination can still work
+ * on intrisics without understanding the meaning of each.
+ *
+ * Each intrinsic has some number of constant indices, some number of
+ * variables, and some number of sources.  What these sources, variables,
+ * and indices mean depends on the intrinsic and is documented with the
+ * intrinsic declaration in nir_intrinsics.h.  Intrinsics and texture
+ * instructions are the only types of instruction that can operate on
+ * variables.
+ */
+typedef struct {
+   nir_instr instr;
+
+   nir_intrinsic_op intrinsic;
+
+   nir_dest dest;
+
+   /** number of components if this is a vectorized intrinsic
+    *
+    * Similarly to ALU operations, some intrinsics are vectorized.
+    * An intrinsic is vectorized if nir_intrinsic_infos.dest_components == 0.
+    * For vectorized intrinsics, the num_components field specifies the
+    * number of destination components and the number of source components
+    * for all sources with nir_intrinsic_infos.src_components[i] == 0.
+    */
+   uint8_t num_components;
+
+   int const_index[3];
+
+   nir_deref_var *variables[2];
+
+   nir_src src[];
+} nir_intrinsic_instr;
+
+/**
+ * \name NIR intrinsics semantic flags
+ *
+ * information about what the compiler can do with the intrinsics.
+ *
+ * \sa nir_intrinsic_info::flags
+ */
+typedef enum {
+   /**
+    * whether the intrinsic can be safely eliminated if none of its output
+    * value is not being used.
+    */
+   NIR_INTRINSIC_CAN_ELIMINATE = (1 << 0),
+
+   /**
+    * Whether the intrinsic can be reordered with respect to any other
+    * intrinsic, i.e. whether the only reordering dependencies of the
+    * intrinsic are due to the register reads/writes.
+    */
+   NIR_INTRINSIC_CAN_REORDER = (1 << 1),
+} nir_intrinsic_semantic_flag;
+
+#define NIR_INTRINSIC_MAX_INPUTS 4
+
+typedef struct {
+   const char *name;
+
+   unsigned num_srcs; /** < number of register/SSA inputs */
+
+   /** number of components of each input register
+    *
+    * If this value is 0, the number of components is given by the
+    * num_components field of nir_intrinsic_instr.
+    */
+   unsigned src_components[NIR_INTRINSIC_MAX_INPUTS];
+
+   bool has_dest;
+
+   /** number of components of the output register
+    *
+    * If this value is 0, the number of components is given by the
+    * num_components field of nir_intrinsic_instr.
+    */
+   unsigned dest_components;
+
+   /** the number of inputs/outputs that are variables */
+   unsigned num_variables;
+
+   /** the number of constant indices used by the intrinsic */
+   unsigned num_indices;
+
+   /** semantic flags for calls to this intrinsic */
+   nir_intrinsic_semantic_flag flags;
+} nir_intrinsic_info;
+
+extern const nir_intrinsic_info nir_intrinsic_infos[nir_num_intrinsics];
+
+/**
+ * \group texture information
+ *
+ * This gives semantic information about textures which is useful to the
+ * frontend, the backend, and lowering passes, but not the optimizer.
+ */
+
+typedef enum {
+   nir_tex_src_coord,
+   nir_tex_src_projector,
+   nir_tex_src_comparitor, /* shadow comparitor */
+   nir_tex_src_offset,
+   nir_tex_src_bias,
+   nir_tex_src_lod,
+   nir_tex_src_ms_index, /* MSAA sample index */
+   nir_tex_src_ddx,
+   nir_tex_src_ddy,
+   nir_tex_src_texture_offset, /* < dynamically uniform indirect offset */
+   nir_tex_src_sampler_offset, /* < dynamically uniform indirect offset */
+   nir_num_tex_src_types
+} nir_tex_src_type;
+
+typedef struct {
+   nir_src src;
+   nir_tex_src_type src_type;
+} nir_tex_src;
+
+typedef enum {
+   nir_texop_tex,                /**< Regular texture look-up */
+   nir_texop_txb,                /**< Texture look-up with LOD bias */
+   nir_texop_txl,                /**< Texture look-up with explicit LOD */
+   nir_texop_txd,                /**< Texture look-up with partial derivatvies */
+   nir_texop_txf,                /**< Texel fetch with explicit LOD */
+   nir_texop_txf_ms,                /**< Multisample texture fetch */
+   nir_texop_txs,                /**< Texture size */
+   nir_texop_lod,                /**< Texture lod query */
+   nir_texop_tg4,                /**< Texture gather */
+   nir_texop_query_levels,       /**< Texture levels query */
+   nir_texop_texture_samples,    /**< Texture samples query */
+   nir_texop_samples_identical,  /**< Query whether all samples are definitely
+                                  * identical.
+                                  */
+} nir_texop;
+
+typedef struct {
+   nir_instr instr;
+
+   enum glsl_sampler_dim sampler_dim;
+   nir_alu_type dest_type;
+
+   nir_texop op;
+   nir_dest dest;
+   nir_tex_src *src;
+   unsigned num_srcs, coord_components;
+   bool is_array, is_shadow;
+
+   /**
+    * If is_shadow is true, whether this is the old-style shadow that outputs 4
+    * components or the new-style shadow that outputs 1 component.
+    */
+   bool is_new_style_shadow;
+
+   /* constant offset - must be 0 if the offset source is used */
+   int const_offset[4];
+
+   /* gather component selector */
+   unsigned component : 2;
+
+   /** The texture index
+    *
+    * If this texture instruction has a nir_tex_src_texture_offset source,
+    * then the texture index is given by texture_index + texture_offset.
+    */
+   unsigned texture_index;
+
+   /** The size of the texture array or 0 if it's not an array */
+   unsigned texture_array_size;
+
+   /** The texture deref
+    *
+    * If both this and `sampler` are both NULL, use texture_index instead.
+    * If `texture` is NULL, but `sampler` is non-NULL, then the texture is
+    * implied from the sampler.
+    */
+   nir_deref_var *texture;
+
+   /** The sampler index
+    *
+    * If this texture instruction has a nir_tex_src_sampler_offset source,
+    * then the sampler index is given by sampler_index + sampler_offset.
+    */
+   unsigned sampler_index;
+
+   /** The sampler deref
+    *
+    * If this is null, use sampler_index instead.
+    */
+   nir_deref_var *sampler;
+} nir_tex_instr;
+
+static inline unsigned
+nir_tex_instr_dest_size(nir_tex_instr *instr)
+{
+   switch (instr->op) {
+   case nir_texop_txs: {
+      unsigned ret;
+      switch (instr->sampler_dim) {
+         case GLSL_SAMPLER_DIM_1D:
+         case GLSL_SAMPLER_DIM_BUF:
+            ret = 1;
+            break;
+         case GLSL_SAMPLER_DIM_2D:
+         case GLSL_SAMPLER_DIM_CUBE:
+         case GLSL_SAMPLER_DIM_MS:
+         case GLSL_SAMPLER_DIM_RECT:
+         case GLSL_SAMPLER_DIM_EXTERNAL:
+            ret = 2;
+            break;
+         case GLSL_SAMPLER_DIM_3D:
+            ret = 3;
+            break;
+         default:
+            unreachable("not reached");
+      }
+      if (instr->is_array)
+         ret++;
+      return ret;
+   }
+
+   case nir_texop_lod:
+      return 2;
+
+   case nir_texop_texture_samples:
+   case nir_texop_query_levels:
+   case nir_texop_samples_identical:
+      return 1;
+
+   default:
+      if (instr->is_shadow && instr->is_new_style_shadow)
+         return 1;
+
+      return 4;
+   }
+}
+
+/* Returns true if this texture operation queries something about the texture
+ * rather than actually sampling it.
+ */
+static inline bool
+nir_tex_instr_is_query(nir_tex_instr *instr)
+{
+   switch (instr->op) {
+   case nir_texop_txs:
+   case nir_texop_lod:
+   case nir_texop_texture_samples:
+   case nir_texop_query_levels:
+      return true;
+   case nir_texop_tex:
+   case nir_texop_txb:
+   case nir_texop_txl:
+   case nir_texop_txd:
+   case nir_texop_txf:
+   case nir_texop_txf_ms:
+   case nir_texop_tg4:
+      return false;
+   default:
+      unreachable("Invalid texture opcode");
+   }
+}
+
+static inline unsigned
+nir_tex_instr_src_size(nir_tex_instr *instr, unsigned src)
+{
+   if (instr->src[src].src_type == nir_tex_src_coord)
+      return instr->coord_components;
+
+
+   if (instr->src[src].src_type == nir_tex_src_offset ||
+       instr->src[src].src_type == nir_tex_src_ddx ||
+       instr->src[src].src_type == nir_tex_src_ddy) {
+      if (instr->is_array)
+         return instr->coord_components - 1;
+      else
+         return instr->coord_components;
+   }
+
+   return 1;
+}
+
+static inline int
+nir_tex_instr_src_index(nir_tex_instr *instr, nir_tex_src_type type)
+{
+   for (unsigned i = 0; i < instr->num_srcs; i++)
+      if (instr->src[i].src_type == type)
+         return (int) i;
+
+   return -1;
+}
+
+typedef struct {
+   union {
+      float f[4];
+      int32_t i[4];
+      uint32_t u[4];
+   };
+} nir_const_value;
+
+typedef struct {
+   nir_instr instr;
+
+   nir_const_value value;
+
+   nir_ssa_def def;
+} nir_load_const_instr;
+
+typedef enum {
+   nir_jump_return,
+   nir_jump_break,
+   nir_jump_continue,
+} nir_jump_type;
+
+typedef struct {
+   nir_instr instr;
+   nir_jump_type type;
+} nir_jump_instr;
+
+/* creates a new SSA variable in an undefined state */
+
+typedef struct {
+   nir_instr instr;
+   nir_ssa_def def;
+} nir_ssa_undef_instr;
+
+typedef struct {
+   struct exec_node node;
+
+   /* The predecessor block corresponding to this source */
+   struct nir_block *pred;
+
+   nir_src src;
+} nir_phi_src;
+
+#define nir_foreach_phi_src(phi, entry) \
+   foreach_list_typed(nir_phi_src, entry, node, &(phi)->srcs)
+#define nir_foreach_phi_src_safe(phi, entry) \
+   foreach_list_typed_safe(nir_phi_src, entry, node, &(phi)->srcs)
+
+typedef struct {
+   nir_instr instr;
+
+   struct exec_list srcs; /** < list of nir_phi_src */
+
+   nir_dest dest;
+} nir_phi_instr;
+
+typedef struct {
+   struct exec_node node;
+   nir_src src;
+   nir_dest dest;
+} nir_parallel_copy_entry;
+
+#define nir_foreach_parallel_copy_entry(pcopy, entry) \
+   foreach_list_typed(nir_parallel_copy_entry, entry, node, &(pcopy)->entries)
+
+typedef struct {
+   nir_instr instr;
+
+   /* A list of nir_parallel_copy_entry's.  The sources of all of the
+    * entries are copied to the corresponding destinations "in parallel".
+    * In other words, if we have two entries: a -> b and b -> a, the values
+    * get swapped.
+    */
+   struct exec_list entries;
+} nir_parallel_copy_instr;
+
+NIR_DEFINE_CAST(nir_instr_as_alu, nir_instr, nir_alu_instr, instr)
+NIR_DEFINE_CAST(nir_instr_as_call, nir_instr, nir_call_instr, instr)
+NIR_DEFINE_CAST(nir_instr_as_jump, nir_instr, nir_jump_instr, instr)
+NIR_DEFINE_CAST(nir_instr_as_tex, nir_instr, nir_tex_instr, instr)
+NIR_DEFINE_CAST(nir_instr_as_intrinsic, nir_instr, nir_intrinsic_instr, instr)
+NIR_DEFINE_CAST(nir_instr_as_load_const, nir_instr, nir_load_const_instr, instr)
+NIR_DEFINE_CAST(nir_instr_as_ssa_undef, nir_instr, nir_ssa_undef_instr, instr)
+NIR_DEFINE_CAST(nir_instr_as_phi, nir_instr, nir_phi_instr, instr)
+NIR_DEFINE_CAST(nir_instr_as_parallel_copy, nir_instr,
+                nir_parallel_copy_instr, instr)
+
+/*
+ * Control flow
+ *
+ * Control flow consists of a tree of control flow nodes, which include
+ * if-statements and loops. The leaves of the tree are basic blocks, lists of
+ * instructions that always run start-to-finish. Each basic block also keeps
+ * track of its successors (blocks which may run immediately after the current
+ * block) and predecessors (blocks which could have run immediately before the
+ * current block). Each function also has a start block and an end block which
+ * all return statements point to (which is always empty). Together, all the
+ * blocks with their predecessors and successors make up the control flow
+ * graph (CFG) of the function. There are helpers that modify the tree of
+ * control flow nodes while modifying the CFG appropriately; these should be
+ * used instead of modifying the tree directly.
+ */
+
+typedef enum {
+   nir_cf_node_block,
+   nir_cf_node_if,
+   nir_cf_node_loop,
+   nir_cf_node_function
+} nir_cf_node_type;
+
+typedef struct nir_cf_node {
+   struct exec_node node;
+   nir_cf_node_type type;
+   struct nir_cf_node *parent;
+} nir_cf_node;
+
+typedef struct nir_block {
+   nir_cf_node cf_node;
+
+   struct exec_list instr_list; /** < list of nir_instr */
+
+   /** generic block index; generated by nir_index_blocks */
+   unsigned index;
+
+   /*
+    * Each block can only have up to 2 successors, so we put them in a simple
+    * array - no need for anything more complicated.
+    */
+   struct nir_block *successors[2];
+
+   /* Set of nir_block predecessors in the CFG */
+   struct set *predecessors;
+
+   /*
+    * this node's immediate dominator in the dominance tree - set to NULL for
+    * the start block.
+    */
+   struct nir_block *imm_dom;
+
+   /* This node's children in the dominance tree */
+   unsigned num_dom_children;
+   struct nir_block **dom_children;
+
+   /* Set of nir_block's on the dominance frontier of this block */
+   struct set *dom_frontier;
+
+   /*
+    * These two indices have the property that dom_{pre,post}_index for each
+    * child of this block in the dominance tree will always be between
+    * dom_pre_index and dom_post_index for this block, which makes testing if
+    * a given block is dominated by another block an O(1) operation.
+    */
+   unsigned dom_pre_index, dom_post_index;
+
+   /* live in and out for this block; used for liveness analysis */
+   BITSET_WORD *live_in;
+   BITSET_WORD *live_out;
+} nir_block;
+
+static inline nir_instr *
+nir_block_first_instr(nir_block *block)
+{
+   struct exec_node *head = exec_list_get_head(&block->instr_list);
+   return exec_node_data(nir_instr, head, node);
+}
+
+static inline nir_instr *
+nir_block_last_instr(nir_block *block)
+{
+   struct exec_node *tail = exec_list_get_tail(&block->instr_list);
+   return exec_node_data(nir_instr, tail, node);
+}
+
+#define nir_foreach_instr(block, instr) \
+   foreach_list_typed(nir_instr, instr, node, &(block)->instr_list)
+#define nir_foreach_instr_reverse(block, instr) \
+   foreach_list_typed_reverse(nir_instr, instr, node, &(block)->instr_list)
+#define nir_foreach_instr_safe(block, instr) \
+   foreach_list_typed_safe(nir_instr, instr, node, &(block)->instr_list)
+#define nir_foreach_instr_reverse_safe(block, instr) \
+   foreach_list_typed_reverse_safe(nir_instr, instr, node, &(block)->instr_list)
+
+typedef struct nir_if {
+   nir_cf_node cf_node;
+   nir_src condition;
+
+   struct exec_list then_list; /** < list of nir_cf_node */
+   struct exec_list else_list; /** < list of nir_cf_node */
+} nir_if;
+
+static inline nir_cf_node *
+nir_if_first_then_node(nir_if *if_stmt)
+{
+   struct exec_node *head = exec_list_get_head(&if_stmt->then_list);
+   return exec_node_data(nir_cf_node, head, node);
+}
+
+static inline nir_cf_node *
+nir_if_last_then_node(nir_if *if_stmt)
+{
+   struct exec_node *tail = exec_list_get_tail(&if_stmt->then_list);
+   return exec_node_data(nir_cf_node, tail, node);
+}
+
+static inline nir_cf_node *
+nir_if_first_else_node(nir_if *if_stmt)
+{
+   struct exec_node *head = exec_list_get_head(&if_stmt->else_list);
+   return exec_node_data(nir_cf_node, head, node);
+}
+
+static inline nir_cf_node *
+nir_if_last_else_node(nir_if *if_stmt)
+{
+   struct exec_node *tail = exec_list_get_tail(&if_stmt->else_list);
+   return exec_node_data(nir_cf_node, tail, node);
+}
+
+typedef struct {
+   nir_cf_node cf_node;
+
+   struct exec_list body; /** < list of nir_cf_node */
+} nir_loop;
+
+static inline nir_cf_node *
+nir_loop_first_cf_node(nir_loop *loop)
+{
+   return exec_node_data(nir_cf_node, exec_list_get_head(&loop->body), node);
+}
+
+static inline nir_cf_node *
+nir_loop_last_cf_node(nir_loop *loop)
+{
+   return exec_node_data(nir_cf_node, exec_list_get_tail(&loop->body), node);
+}
+
+/**
+ * Various bits of metadata that can may be created or required by
+ * optimization and analysis passes
+ */
+typedef enum {
+   nir_metadata_none = 0x0,
+   nir_metadata_block_index = 0x1,
+   nir_metadata_dominance = 0x2,
+   nir_metadata_live_ssa_defs = 0x4,
+   nir_metadata_not_properly_reset = 0x8,
+} nir_metadata;
+
+typedef struct {
+   nir_cf_node cf_node;
+
+   /** pointer to the function of which this is an implementation */
+   struct nir_function *function;
+
+   struct exec_list body; /** < list of nir_cf_node */
+
+   nir_block *end_block;
+
+   /** list for all local variables in the function */
+   struct exec_list locals;
+
+   /** array of variables used as parameters */
+   unsigned num_params;
+   nir_variable **params;
+
+   /** variable used to hold the result of the function */
+   nir_variable *return_var;
+
+   /** list of local registers in the function */
+   struct exec_list registers;
+
+   /** next available local register index */
+   unsigned reg_alloc;
+
+   /** next available SSA value index */
+   unsigned ssa_alloc;
+
+   /* total number of basic blocks, only valid when block_index_dirty = false */
+   unsigned num_blocks;
+
+   nir_metadata valid_metadata;
+} nir_function_impl;
+
+static inline nir_block *
+nir_start_block(nir_function_impl *impl)
+{
+   return (nir_block *) exec_list_get_head(&impl->body);
+}
+
+static inline nir_cf_node *
+nir_cf_node_next(nir_cf_node *node)
+{
+   struct exec_node *next = exec_node_get_next(&node->node);
+   if (exec_node_is_tail_sentinel(next))
+      return NULL;
+   else
+      return exec_node_data(nir_cf_node, next, node);
+}
+
+static inline nir_cf_node *
+nir_cf_node_prev(nir_cf_node *node)
+{
+   struct exec_node *prev = exec_node_get_prev(&node->node);
+   if (exec_node_is_head_sentinel(prev))
+      return NULL;
+   else
+      return exec_node_data(nir_cf_node, prev, node);
+}
+
+static inline bool
+nir_cf_node_is_first(const nir_cf_node *node)
+{
+   return exec_node_is_head_sentinel(node->node.prev);
+}
+
+static inline bool
+nir_cf_node_is_last(const nir_cf_node *node)
+{
+   return exec_node_is_tail_sentinel(node->node.next);
+}
+
+NIR_DEFINE_CAST(nir_cf_node_as_block, nir_cf_node, nir_block, cf_node)
+NIR_DEFINE_CAST(nir_cf_node_as_if, nir_cf_node, nir_if, cf_node)
+NIR_DEFINE_CAST(nir_cf_node_as_loop, nir_cf_node, nir_loop, cf_node)
+NIR_DEFINE_CAST(nir_cf_node_as_function, nir_cf_node, nir_function_impl, cf_node)
+
+typedef enum {
+   nir_parameter_in,
+   nir_parameter_out,
+   nir_parameter_inout,
+} nir_parameter_type;
+
+typedef struct {
+   nir_parameter_type param_type;
+   const struct glsl_type *type;
+} nir_parameter;
+
+typedef struct nir_function {
+   struct exec_node node;
+
+   const char *name;
+   struct nir_shader *shader;
+
+   unsigned num_params;
+   nir_parameter *params;
+   const struct glsl_type *return_type;
+
+   /** The implementation of this function.
+    *
+    * If the function is only declared and not implemented, this is NULL.
+    */
+   nir_function_impl *impl;
+} nir_function;
+
+typedef struct nir_shader_compiler_options {
+   bool lower_fdiv;
+   bool lower_ffma;
+   bool lower_flrp;
+   bool lower_fpow;
+   bool lower_fsat;
+   bool lower_fsqrt;
+   bool lower_fmod;
+   bool lower_bitfield_extract;
+   bool lower_bitfield_insert;
+   bool lower_uadd_carry;
+   bool lower_usub_borrow;
+   /** lowers fneg and ineg to fsub and isub. */
+   bool lower_negate;
+   /** lowers fsub and isub to fadd+fneg and iadd+ineg. */
+   bool lower_sub;
+
+   /* lower {slt,sge,seq,sne} to {flt,fge,feq,fne} + b2f: */
+   bool lower_scmp;
+
+   /* Does the native fdot instruction replicate its result for four
+    * components?  If so, then opt_algebraic_late will turn all fdotN
+    * instructions into fdot_replicatedN instructions.
+    */
+   bool fdot_replicates;
+
+   /** lowers ffract to fsub+ffloor: */
+   bool lower_ffract;
+
+   bool lower_pack_half_2x16;
+   bool lower_pack_unorm_2x16;
+   bool lower_pack_snorm_2x16;
+   bool lower_pack_unorm_4x8;
+   bool lower_pack_snorm_4x8;
+   bool lower_unpack_half_2x16;
+   bool lower_unpack_unorm_2x16;
+   bool lower_unpack_snorm_2x16;
+   bool lower_unpack_unorm_4x8;
+   bool lower_unpack_snorm_4x8;
+
+   bool lower_extract_byte;
+   bool lower_extract_word;
+
+   /**
+    * Does the driver support real 32-bit integers?  (Otherwise, integers
+    * are simulated by floats.)
+    */
+   bool native_integers;
+
+   /* Indicates that the driver only has zero-based vertex id */
+   bool vertex_id_zero_based;
+} nir_shader_compiler_options;
+
+typedef struct nir_shader_info {
+   const char *name;
+
+   /* Descriptive name provided by the client; may be NULL */
+   const char *label;
+
+   /* Number of textures used by this shader */
+   unsigned num_textures;
+   /* Number of uniform buffers used by this shader */
+   unsigned num_ubos;
+   /* Number of atomic buffers used by this shader */
+   unsigned num_abos;
+   /* Number of shader storage buffers used by this shader */
+   unsigned num_ssbos;
+   /* Number of images used by this shader */
+   unsigned num_images;
+
+   /* Which inputs are actually read */
+   uint64_t inputs_read;
+   /* Which outputs are actually written */
+   uint64_t outputs_written;
+   /* Which system values are actually read */
+   uint64_t system_values_read;
+
+   /* Which patch inputs are actually read */
+   uint32_t patch_inputs_read;
+   /* Which patch outputs are actually written */
+   uint32_t patch_outputs_written;
+
+   /* Whether or not this shader ever uses textureGather() */
+   bool uses_texture_gather;
+
+   /* Whether or not this shader uses the gl_ClipDistance output */
+   bool uses_clip_distance_out;
+
+   /* Whether or not separate shader objects were used */
+   bool separate_shader;
+
+   /** Was this shader linked with any transform feedback varyings? */
+   bool has_transform_feedback_varyings;
+
+   union {
+      struct {
+         /** The number of vertices recieves per input primitive */
+         unsigned vertices_in;
+
+         /** The output primitive type (GL enum value) */
+         unsigned output_primitive;
+
+         /** The maximum number of vertices the geometry shader might write. */
+         unsigned vertices_out;
+
+         /** 1 .. MAX_GEOMETRY_SHADER_INVOCATIONS */
+         unsigned invocations;
+
+         /** Whether or not this shader uses EndPrimitive */
+         bool uses_end_primitive;
+
+         /** Whether or not this shader uses non-zero streams */
+         bool uses_streams;
+      } gs;
+
+      struct {
+         bool uses_discard;
+
+         /**
+          * Whether early fragment tests are enabled as defined by
+          * ARB_shader_image_load_store.
+          */
+         bool early_fragment_tests;
+
+         /** gl_FragDepth layout for ARB_conservative_depth. */
+         enum gl_frag_depth_layout depth_layout;
+      } fs;
+
+      struct {
+         unsigned local_size[3];
+      } cs;
+
+      struct {
+         /** The number of vertices in the TCS output patch. */
+         unsigned vertices_out;
+      } tcs;
+   };
+} nir_shader_info;
+
+typedef struct nir_shader {
+   /** list of uniforms (nir_variable) */
+   struct exec_list uniforms;
+
+   /** list of inputs (nir_variable) */
+   struct exec_list inputs;
+
+   /** list of outputs (nir_variable) */
+   struct exec_list outputs;
+
+   /** list of shared compute variables (nir_variable) */
+   struct exec_list shared;
+
+   /** Set of driver-specific options for the shader.
+    *
+    * The memory for the options is expected to be kept in a single static
+    * copy by the driver.
+    */
+   const struct nir_shader_compiler_options *options;
+
+   /** Various bits of compile-time information about a given shader */
+   struct nir_shader_info info;
+
+   /** list of global variables in the shader (nir_variable) */
+   struct exec_list globals;
+
+   /** list of system value variables in the shader (nir_variable) */
+   struct exec_list system_values;
+
+   struct exec_list functions; /** < list of nir_function */
+
+   /** list of global register in the shader */
+   struct exec_list registers;
+
+   /** next available global register index */
+   unsigned reg_alloc;
+
+   /**
+    * the highest index a load_input_*, load_uniform_*, etc. intrinsic can
+    * access plus one
+    */
+   unsigned num_inputs, num_uniforms, num_outputs, num_shared;
+
+   /** The shader stage, such as MESA_SHADER_VERTEX. */
+   gl_shader_stage stage;
+} nir_shader;
+
+#define nir_foreach_function(shader, func) \
+   foreach_list_typed(nir_function, func, node, &(shader)->functions)
+
+nir_shader *nir_shader_create(void *mem_ctx,
+                              gl_shader_stage stage,
+                              const nir_shader_compiler_options *options);
+
+/** creates a register, including assigning it an index and adding it to the list */
+nir_register *nir_global_reg_create(nir_shader *shader);
+
+nir_register *nir_local_reg_create(nir_function_impl *impl);
+
+void nir_reg_remove(nir_register *reg);
+
+/** Adds a variable to the appropreate list in nir_shader */
+void nir_shader_add_variable(nir_shader *shader, nir_variable *var);
+
+static inline void
+nir_function_impl_add_variable(nir_function_impl *impl, nir_variable *var)
+{
+   assert(var->data.mode == nir_var_local);
+   exec_list_push_tail(&impl->locals, &var->node);
+}
+
+/** creates a variable, sets a few defaults, and adds it to the list */
+nir_variable *nir_variable_create(nir_shader *shader,
+                                  nir_variable_mode mode,
+                                  const struct glsl_type *type,
+                                  const char *name);
+/** creates a local variable and adds it to the list */
+nir_variable *nir_local_variable_create(nir_function_impl *impl,
+                                        const struct glsl_type *type,
+                                        const char *name);
+
+/** creates a function and adds it to the shader's list of functions */
+nir_function *nir_function_create(nir_shader *shader, const char *name);
+
+nir_function_impl *nir_function_impl_create(nir_function *func);
+/** creates a function_impl that isn't tied to any particular function */
+nir_function_impl *nir_function_impl_create_bare(nir_shader *shader);
+
+nir_block *nir_block_create(nir_shader *shader);
+nir_if *nir_if_create(nir_shader *shader);
+nir_loop *nir_loop_create(nir_shader *shader);
+
+nir_function_impl *nir_cf_node_get_function(nir_cf_node *node);
+
+/** requests that the given pieces of metadata be generated */
+void nir_metadata_require(nir_function_impl *impl, nir_metadata required);
+/** dirties all but the preserved metadata */
+void nir_metadata_preserve(nir_function_impl *impl, nir_metadata preserved);
+
+/** creates an instruction with default swizzle/writemask/etc. with NULL registers */
+nir_alu_instr *nir_alu_instr_create(nir_shader *shader, nir_op op);
+
+nir_jump_instr *nir_jump_instr_create(nir_shader *shader, nir_jump_type type);
+
+nir_load_const_instr *nir_load_const_instr_create(nir_shader *shader,
+                                                  unsigned num_components);
+
+nir_intrinsic_instr *nir_intrinsic_instr_create(nir_shader *shader,
+                                                nir_intrinsic_op op);
+
+nir_call_instr *nir_call_instr_create(nir_shader *shader,
+                                      nir_function *callee);
+
+nir_tex_instr *nir_tex_instr_create(nir_shader *shader, unsigned num_srcs);
+
+nir_phi_instr *nir_phi_instr_create(nir_shader *shader);
+
+nir_parallel_copy_instr *nir_parallel_copy_instr_create(nir_shader *shader);
+
+nir_ssa_undef_instr *nir_ssa_undef_instr_create(nir_shader *shader,
+                                                unsigned num_components);
+
+nir_deref_var *nir_deref_var_create(void *mem_ctx, nir_variable *var);
+nir_deref_array *nir_deref_array_create(void *mem_ctx);
+nir_deref_struct *nir_deref_struct_create(void *mem_ctx, unsigned field_index);
+
+nir_deref *nir_copy_deref(void *mem_ctx, nir_deref *deref);
+
+nir_load_const_instr *
+nir_deref_get_const_initializer_load(nir_shader *shader, nir_deref_var *deref);
+
+/**
+ * NIR Cursors and Instruction Insertion API
+ * @{
+ *
+ * A tiny struct representing a point to insert/extract instructions or
+ * control flow nodes.  Helps reduce the combinatorial explosion of possible
+ * points to insert/extract.
+ *
+ * \sa nir_control_flow.h
+ */
+typedef enum {
+   nir_cursor_before_block,
+   nir_cursor_after_block,
+   nir_cursor_before_instr,
+   nir_cursor_after_instr,
+} nir_cursor_option;
+
+typedef struct {
+   nir_cursor_option option;
+   union {
+      nir_block *block;
+      nir_instr *instr;
+   };
+} nir_cursor;
+
+static inline nir_block *
+nir_cursor_current_block(nir_cursor cursor)
+{
+   if (cursor.option == nir_cursor_before_instr ||
+       cursor.option == nir_cursor_after_instr) {
+      return cursor.instr->block;
+   } else {
+      return cursor.block;
+   }
+}
+
+bool nir_cursors_equal(nir_cursor a, nir_cursor b);
+
+static inline nir_cursor
+nir_before_block(nir_block *block)
+{
+   nir_cursor cursor;
+   cursor.option = nir_cursor_before_block;
+   cursor.block = block;
+   return cursor;
+}
+
+static inline nir_cursor
+nir_after_block(nir_block *block)
+{
+   nir_cursor cursor;
+   cursor.option = nir_cursor_after_block;
+   cursor.block = block;
+   return cursor;
+}
+
+static inline nir_cursor
+nir_before_instr(nir_instr *instr)
+{
+   nir_cursor cursor;
+   cursor.option = nir_cursor_before_instr;
+   cursor.instr = instr;
+   return cursor;
+}
+
+static inline nir_cursor
+nir_after_instr(nir_instr *instr)
+{
+   nir_cursor cursor;
+   cursor.option = nir_cursor_after_instr;
+   cursor.instr = instr;
+   return cursor;
+}
+
+static inline nir_cursor
+nir_after_block_before_jump(nir_block *block)
+{
+   nir_instr *last_instr = nir_block_last_instr(block);
+   if (last_instr && last_instr->type == nir_instr_type_jump) {
+      return nir_before_instr(last_instr);
+   } else {
+      return nir_after_block(block);
+   }
+}
+
+static inline nir_cursor
+nir_before_cf_node(nir_cf_node *node)
+{
+   if (node->type == nir_cf_node_block)
+      return nir_before_block(nir_cf_node_as_block(node));
+
+   return nir_after_block(nir_cf_node_as_block(nir_cf_node_prev(node)));
+}
+
+static inline nir_cursor
+nir_after_cf_node(nir_cf_node *node)
+{
+   if (node->type == nir_cf_node_block)
+      return nir_after_block(nir_cf_node_as_block(node));
+
+   return nir_before_block(nir_cf_node_as_block(nir_cf_node_next(node)));
+}
+
+static inline nir_cursor
+nir_after_cf_node_and_phis(nir_cf_node *node)
+{
+   if (node->type == nir_cf_node_block)
+      return nir_after_block(nir_cf_node_as_block(node));
+
+   nir_block *block = nir_cf_node_as_block(nir_cf_node_next(node));
+   assert(block->cf_node.type == nir_cf_node_block);
+
+   nir_foreach_instr(block, instr) {
+      if (instr->type != nir_instr_type_phi)
+         return nir_before_instr(instr);
+   }
+   return nir_after_block(block);
+}
+
+static inline nir_cursor
+nir_before_cf_list(struct exec_list *cf_list)
+{
+   nir_cf_node *first_node = exec_node_data(nir_cf_node,
+                                            exec_list_get_head(cf_list), node);
+   return nir_before_cf_node(first_node);
+}
+
+static inline nir_cursor
+nir_after_cf_list(struct exec_list *cf_list)
+{
+   nir_cf_node *last_node = exec_node_data(nir_cf_node,
+                                           exec_list_get_tail(cf_list), node);
+   return nir_after_cf_node(last_node);
+}
+
+/**
+ * Insert a NIR instruction at the given cursor.
+ *
+ * Note: This does not update the cursor.
+ */
+void nir_instr_insert(nir_cursor cursor, nir_instr *instr);
+
+static inline void
+nir_instr_insert_before(nir_instr *instr, nir_instr *before)
+{
+   nir_instr_insert(nir_before_instr(instr), before);
+}
+
+static inline void
+nir_instr_insert_after(nir_instr *instr, nir_instr *after)
+{
+   nir_instr_insert(nir_after_instr(instr), after);
+}
+
+static inline void
+nir_instr_insert_before_block(nir_block *block, nir_instr *before)
+{
+   nir_instr_insert(nir_before_block(block), before);
+}
+
+static inline void
+nir_instr_insert_after_block(nir_block *block, nir_instr *after)
+{
+   nir_instr_insert(nir_after_block(block), after);
+}
+
+static inline void
+nir_instr_insert_before_cf(nir_cf_node *node, nir_instr *before)
+{
+   nir_instr_insert(nir_before_cf_node(node), before);
+}
+
+static inline void
+nir_instr_insert_after_cf(nir_cf_node *node, nir_instr *after)
+{
+   nir_instr_insert(nir_after_cf_node(node), after);
+}
+
+static inline void
+nir_instr_insert_before_cf_list(struct exec_list *list, nir_instr *before)
+{
+   nir_instr_insert(nir_before_cf_list(list), before);
+}
+
+static inline void
+nir_instr_insert_after_cf_list(struct exec_list *list, nir_instr *after)
+{
+   nir_instr_insert(nir_after_cf_list(list), after);
+}
+
+void nir_instr_remove(nir_instr *instr);
+
+/** @} */
+
+typedef bool (*nir_foreach_ssa_def_cb)(nir_ssa_def *def, void *state);
+typedef bool (*nir_foreach_dest_cb)(nir_dest *dest, void *state);
+typedef bool (*nir_foreach_src_cb)(nir_src *src, void *state);
+bool nir_foreach_ssa_def(nir_instr *instr, nir_foreach_ssa_def_cb cb,
+                         void *state);
+bool nir_foreach_dest(nir_instr *instr, nir_foreach_dest_cb cb, void *state);
+bool nir_foreach_src(nir_instr *instr, nir_foreach_src_cb cb, void *state);
+
+nir_const_value *nir_src_as_const_value(nir_src src);
+bool nir_src_is_dynamically_uniform(nir_src src);
+bool nir_srcs_equal(nir_src src1, nir_src src2);
+void nir_instr_rewrite_src(nir_instr *instr, nir_src *src, nir_src new_src);
+void nir_instr_move_src(nir_instr *dest_instr, nir_src *dest, nir_src *src);
+void nir_if_rewrite_condition(nir_if *if_stmt, nir_src new_src);
+void nir_instr_rewrite_dest(nir_instr *instr, nir_dest *dest,
+                            nir_dest new_dest);
+
+void nir_ssa_dest_init(nir_instr *instr, nir_dest *dest,
+                       unsigned num_components, const char *name);
+void nir_ssa_def_init(nir_instr *instr, nir_ssa_def *def,
+                      unsigned num_components, const char *name);
+void nir_ssa_def_rewrite_uses(nir_ssa_def *def, nir_src new_src);
+void nir_ssa_def_rewrite_uses_after(nir_ssa_def *def, nir_src new_src,
+                                    nir_instr *after_me);
+
+/* visits basic blocks in source-code order */
+typedef bool (*nir_foreach_block_cb)(nir_block *block, void *state);
+bool nir_foreach_block(nir_function_impl *impl, nir_foreach_block_cb cb,
+                       void *state);
+bool nir_foreach_block_reverse(nir_function_impl *impl, nir_foreach_block_cb cb,
+                               void *state);
+bool nir_foreach_block_in_cf_node(nir_cf_node *node, nir_foreach_block_cb cb,
+                                  void *state);
+
+/* If the following CF node is an if, this function returns that if.
+ * Otherwise, it returns NULL.
+ */
+nir_if *nir_block_get_following_if(nir_block *block);
+
+nir_loop *nir_block_get_following_loop(nir_block *block);
+
+void nir_index_local_regs(nir_function_impl *impl);
+void nir_index_global_regs(nir_shader *shader);
+void nir_index_ssa_defs(nir_function_impl *impl);
+unsigned nir_index_instrs(nir_function_impl *impl);
+
+void nir_index_blocks(nir_function_impl *impl);
+
+void nir_print_shader(nir_shader *shader, FILE *fp);
+void nir_print_instr(const nir_instr *instr, FILE *fp);
+
+nir_shader *nir_shader_clone(void *mem_ctx, const nir_shader *s);
+nir_function_impl *nir_function_impl_clone(const nir_function_impl *impl);
+nir_constant *nir_constant_clone(const nir_constant *c, nir_variable *var);
+
+#ifdef DEBUG
+void nir_validate_shader(nir_shader *shader);
+void nir_metadata_set_validation_flag(nir_shader *shader);
+void nir_metadata_check_validation_flag(nir_shader *shader);
+
+#include "util/debug.h"
+static inline bool
+should_clone_nir(void)
+{
+   static int should_clone = -1;
+   if (should_clone < 0)
+      should_clone = env_var_as_boolean("NIR_TEST_CLONE", false);
+
+   return should_clone;
+}
+#else
+static inline void nir_validate_shader(nir_shader *shader) { (void) shader; }
+static inline void nir_metadata_set_validation_flag(nir_shader *shader) { (void) shader; }
+static inline void nir_metadata_check_validation_flag(nir_shader *shader) { (void) shader; }
+static inline bool should_clone_nir(void) { return false; }
+#endif /* DEBUG */
+
+#define _PASS(nir, do_pass) do {                                     \
+   do_pass                                                           \
+   nir_validate_shader(nir);                                         \
+   if (should_clone_nir()) {                                         \
+      nir_shader *clone = nir_shader_clone(ralloc_parent(nir), nir); \
+      ralloc_free(nir);                                              \
+      nir = clone;                                                   \
+   }                                                                 \
+} while (0)
+
+#define NIR_PASS(progress, nir, pass, ...) _PASS(nir,                \
+   nir_metadata_set_validation_flag(nir);                            \
+   if (pass(nir, ##__VA_ARGS__)) {                                   \
+      progress = true;                                               \
+      nir_metadata_check_validation_flag(nir);                       \
+   }                                                                 \
+)
+
+#define NIR_PASS_V(nir, pass, ...) _PASS(nir,                        \
+   pass(nir, ##__VA_ARGS__);                                         \
+)
+
+void nir_calc_dominance_impl(nir_function_impl *impl);
+void nir_calc_dominance(nir_shader *shader);
+
+nir_block *nir_dominance_lca(nir_block *b1, nir_block *b2);
+bool nir_block_dominates(nir_block *parent, nir_block *child);
+
+void nir_dump_dom_tree_impl(nir_function_impl *impl, FILE *fp);
+void nir_dump_dom_tree(nir_shader *shader, FILE *fp);
+
+void nir_dump_dom_frontier_impl(nir_function_impl *impl, FILE *fp);
+void nir_dump_dom_frontier(nir_shader *shader, FILE *fp);
+
+void nir_dump_cfg_impl(nir_function_impl *impl, FILE *fp);
+void nir_dump_cfg(nir_shader *shader, FILE *fp);
+
+int nir_gs_count_vertices(const nir_shader *shader);
+
+bool nir_split_var_copies(nir_shader *shader);
+
+bool nir_lower_returns_impl(nir_function_impl *impl);
+bool nir_lower_returns(nir_shader *shader);
+
+bool nir_inline_functions(nir_shader *shader);
+
+void nir_lower_var_copy_instr(nir_intrinsic_instr *copy, void *mem_ctx);
+void nir_lower_var_copies(nir_shader *shader);
+
+bool nir_lower_global_vars_to_local(nir_shader *shader);
+
+bool nir_lower_indirect_derefs(nir_shader *shader, uint32_t mode_mask);
+
+bool nir_lower_locals_to_regs(nir_shader *shader);
+
+void nir_lower_outputs_to_temporaries(nir_shader *shader,
+                                      nir_function *entrypoint);
+
+void nir_shader_gather_info(nir_shader *shader, nir_function_impl *entrypoint);
+
+void nir_assign_var_locations(struct exec_list *var_list,
+                              unsigned *size,
+                              int (*type_size)(const struct glsl_type *));
+
+void nir_lower_io(nir_shader *shader,
+                  nir_variable_mode mode,
+                  int (*type_size)(const struct glsl_type *));
+nir_src *nir_get_io_offset_src(nir_intrinsic_instr *instr);
+nir_src *nir_get_io_vertex_index_src(nir_intrinsic_instr *instr);
+
+void nir_lower_vars_to_ssa(nir_shader *shader);
+
+bool nir_remove_dead_variables(nir_shader *shader, nir_variable_mode mode);
+
+void nir_move_vec_src_uses_to_dest(nir_shader *shader);
+bool nir_lower_vec_to_movs(nir_shader *shader);
+void nir_lower_alu_to_scalar(nir_shader *shader);
+void nir_lower_load_const_to_scalar(nir_shader *shader);
+
+void nir_lower_phis_to_scalar(nir_shader *shader);
+
+void nir_lower_samplers(nir_shader *shader,
+                        const struct gl_shader_program *shader_program);
+
+bool nir_lower_system_values(nir_shader *shader);
+
+typedef struct nir_lower_tex_options {
+   /**
+    * bitmask of (1 << GLSL_SAMPLER_DIM_x) to control for which
+    * sampler types a texture projector is lowered.
+    */
+   unsigned lower_txp;
+
+   /**
+    * If true, lower rect textures to 2D, using txs to fetch the
+    * texture dimensions and dividing the texture coords by the
+    * texture dims to normalize.
+    */
+   bool lower_rect;
+
+   /**
+    * To emulate certain texture wrap modes, this can be used
+    * to saturate the specified tex coord to [0.0, 1.0].  The
+    * bits are according to sampler #, ie. if, for example:
+    *
+    *   (conf->saturate_s & (1 << n))
+    *
+    * is true, then the s coord for sampler n is saturated.
+    *
+    * Note that clamping must happen *after* projector lowering
+    * so any projected texture sample instruction with a clamped
+    * coordinate gets automatically lowered, regardless of the
+    * 'lower_txp' setting.
+    */
+   unsigned saturate_s;
+   unsigned saturate_t;
+   unsigned saturate_r;
+
+   /* Bitmask of samplers that need swizzling.
+    *
+    * If (swizzle_result & (1 << sampler_index)), then the swizzle in
+    * swizzles[sampler_index] is applied to the result of the texturing
+    * operation.
+    */
+   unsigned swizzle_result;
+
+   /* A swizzle for each sampler.  Values 0-3 represent x, y, z, or w swizzles
+    * while 4 and 5 represent 0 and 1 respectively.
+    */
+   uint8_t swizzles[32][4];
+} nir_lower_tex_options;
+
+bool nir_lower_tex(nir_shader *shader,
+                   const nir_lower_tex_options *options);
+
+void nir_lower_idiv(nir_shader *shader);
+
+void nir_lower_clip_vs(nir_shader *shader, unsigned ucp_enables);
+void nir_lower_clip_fs(nir_shader *shader, unsigned ucp_enables);
+
+void nir_lower_two_sided_color(nir_shader *shader);
+
+void nir_lower_atomics(nir_shader *shader,
+                       const struct gl_shader_program *shader_program);
+void nir_lower_to_source_mods(nir_shader *shader);
+
+bool nir_lower_gs_intrinsics(nir_shader *shader);
+
+bool nir_normalize_cubemap_coords(nir_shader *shader);
+
+void nir_live_ssa_defs_impl(nir_function_impl *impl);
+bool nir_ssa_defs_interfere(nir_ssa_def *a, nir_ssa_def *b);
+
+void nir_convert_to_ssa_impl(nir_function_impl *impl);
+void nir_convert_to_ssa(nir_shader *shader);
+
+bool nir_repair_ssa_impl(nir_function_impl *impl);
+bool nir_repair_ssa(nir_shader *shader);
+
+/* If phi_webs_only is true, only convert SSA values involved in phi nodes to
+ * registers.  If false, convert all values (even those not involved in a phi
+ * node) to registers.
+ */
+void nir_convert_from_ssa(nir_shader *shader, bool phi_webs_only);
+
+bool nir_opt_algebraic(nir_shader *shader);
+bool nir_opt_algebraic_late(nir_shader *shader);
+bool nir_opt_constant_folding(nir_shader *shader);
+
+bool nir_opt_global_to_local(nir_shader *shader);
+
+bool nir_copy_prop(nir_shader *shader);
+
+bool nir_opt_cse(nir_shader *shader);
+
+bool nir_opt_dce(nir_shader *shader);
+
+bool nir_opt_dead_cf(nir_shader *shader);
+
+void nir_opt_gcm(nir_shader *shader);
+
+bool nir_opt_peephole_select(nir_shader *shader);
+
+bool nir_opt_remove_phis(nir_shader *shader);
+
+bool nir_opt_undef(nir_shader *shader);
+
+void nir_sweep(nir_shader *shader);
+
+nir_intrinsic_op nir_intrinsic_from_system_value(gl_system_value val);
+gl_system_value nir_system_value_from_intrinsic(nir_intrinsic_op intrin);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
diff --git a/src/compiler/nir/nir_algebraic.py b/src/compiler/nir/nir_algebraic.py
new file mode 100644
index 00000000000..14c0e822ad8
--- /dev/null
+++ b/src/compiler/nir/nir_algebraic.py
@@ -0,0 +1,305 @@
+#! /usr/bin/env python
+#
+# Copyright (C) 2014 Intel Corporation
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice (including the next
+# paragraph) shall be included in all copies or substantial portions of the
+# Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+#
+# Authors:
+#    Jason Ekstrand ([email protected])
+
+import itertools
+import struct
+import sys
+import mako.template
+import re
+
+# Represents a set of variables, each with a unique id
+class VarSet(object):
+   def __init__(self):
+      self.names = {}
+      self.ids = itertools.count()
+      self.immutable = False;
+
+   def __getitem__(self, name):
+      if name not in self.names:
+         assert not self.immutable, "Unknown replacement variable: " + name
+         self.names[name] = self.ids.next()
+
+      return self.names[name]
+
+   def lock(self):
+      self.immutable = True
+
+class Value(object):
+   @staticmethod
+   def create(val, name_base, varset):
+      if isinstance(val, tuple):
+         return Expression(val, name_base, varset)
+      elif isinstance(val, Expression):
+         return val
+      elif isinstance(val, (str, unicode)):
+         return Variable(val, name_base, varset)
+      elif isinstance(val, (bool, int, long, float)):
+         return Constant(val, name_base)
+
+   __template = mako.template.Template("""
+static const ${val.c_type} ${val.name} = {
+   { ${val.type_enum} },
+% if isinstance(val, Constant):
+   { ${hex(val)} /* ${val.value} */ },
+% elif isinstance(val, Variable):
+   ${val.index}, /* ${val.var_name} */
+   ${'true' if val.is_constant else 'false'},
+   nir_type_${ val.required_type or 'invalid' },
+% elif isinstance(val, Expression):
+   nir_op_${val.opcode},
+   { ${', '.join(src.c_ptr for src in val.sources)} },
+% endif
+};""")
+
+   def __init__(self, name, type_str):
+      self.name = name
+      self.type_str = type_str
+
+   @property
+   def type_enum(self):
+      return "nir_search_value_" + self.type_str
+
+   @property
+   def c_type(self):
+      return "nir_search_" + self.type_str
+
+   @property
+   def c_ptr(self):
+      return "&{0}.value".format(self.name)
+
+   def render(self):
+      return self.__template.render(val=self,
+                                    Constant=Constant,
+                                    Variable=Variable,
+                                    Expression=Expression)
+
+class Constant(Value):
+   def __init__(self, val, name):
+      Value.__init__(self, name, "constant")
+      self.value = val
+
+   def __hex__(self):
+      # Even if it's an integer, we still need to unpack as an unsigned
+      # int.  This is because, without C99, we can only assign to the first
+      # element of a union in an initializer.
+      if isinstance(self.value, (bool)):
+         return 'NIR_TRUE' if self.value else 'NIR_FALSE'
+      if isinstance(self.value, (int, long)):
+         return hex(struct.unpack('I', struct.pack('i' if self.value < 0 else 'I', self.value))[0])
+      elif isinstance(self.value, float):
+         return hex(struct.unpack('I', struct.pack('f', self.value))[0])
+      else:
+         assert False
+
+_var_name_re = re.compile(r"(?P<const>#)?(?P<name>\w+)(?:@(?P<type>\w+))?")
+
+class Variable(Value):
+   def __init__(self, val, name, varset):
+      Value.__init__(self, name, "variable")
+
+      m = _var_name_re.match(val)
+      assert m and m.group('name') is not None
+
+      self.var_name = m.group('name')
+      self.is_constant = m.group('const') is not None
+      self.required_type = m.group('type')
+
+      if self.required_type is not None:
+         assert self.required_type in ('float', 'bool', 'int', 'unsigned')
+
+      self.index = varset[self.var_name]
+
+class Expression(Value):
+   def __init__(self, expr, name_base, varset):
+      Value.__init__(self, name_base, "expression")
+      assert isinstance(expr, tuple)
+
+      self.opcode = expr[0]
+      self.sources = [ Value.create(src, "{0}_{1}".format(name_base, i), varset)
+                       for (i, src) in enumerate(expr[1:]) ]
+
+   def render(self):
+      srcs = "\n".join(src.render() for src in self.sources)
+      return srcs + super(Expression, self).render()
+
+_optimization_ids = itertools.count()
+
+condition_list = ['true']
+
+class SearchAndReplace(object):
+   def __init__(self, transform):
+      self.id = _optimization_ids.next()
+
+      search = transform[0]
+      replace = transform[1]
+      if len(transform) > 2:
+         self.condition = transform[2]
+      else:
+         self.condition = 'true'
+
+      if self.condition not in condition_list:
+         condition_list.append(self.condition)
+      self.condition_index = condition_list.index(self.condition)
+
+      varset = VarSet()
+      if isinstance(search, Expression):
+         self.search = search
+      else:
+         self.search = Expression(search, "search{0}".format(self.id), varset)
+
+      varset.lock()
+
+      if isinstance(replace, Value):
+         self.replace = replace
+      else:
+         self.replace = Value.create(replace, "replace{0}".format(self.id), varset)
+
+_algebraic_pass_template = mako.template.Template("""
+#include "nir.h"
+#include "nir_search.h"
+
+#ifndef NIR_OPT_ALGEBRAIC_STRUCT_DEFS
+#define NIR_OPT_ALGEBRAIC_STRUCT_DEFS
+
+struct transform {
+   const nir_search_expression *search;
+   const nir_search_value *replace;
+   unsigned condition_offset;
+};
+
+struct opt_state {
+   void *mem_ctx;
+   bool progress;
+   const bool *condition_flags;
+};
+
+#endif
+
+% for (opcode, xform_list) in xform_dict.iteritems():
+% for xform in xform_list:
+   ${xform.search.render()}
+   ${xform.replace.render()}
+% endfor
+
+static const struct transform ${pass_name}_${opcode}_xforms[] = {
+% for xform in xform_list:
+   { &${xform.search.name}, ${xform.replace.c_ptr}, ${xform.condition_index} },
+% endfor
+};
+% endfor
+
+static bool
+${pass_name}_block(nir_block *block, void *void_state)
+{
+   struct opt_state *state = void_state;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_alu)
+         continue;
+
+      nir_alu_instr *alu = nir_instr_as_alu(instr);
+      if (!alu->dest.dest.is_ssa)
+         continue;
+
+      switch (alu->op) {
+      % for opcode in xform_dict.keys():
+      case nir_op_${opcode}:
+         for (unsigned i = 0; i < ARRAY_SIZE(${pass_name}_${opcode}_xforms); i++) {
+            const struct transform *xform = &${pass_name}_${opcode}_xforms[i];
+            if (state->condition_flags[xform->condition_offset] &&
+                nir_replace_instr(alu, xform->search, xform->replace,
+                                  state->mem_ctx)) {
+               state->progress = true;
+               break;
+            }
+         }
+         break;
+      % endfor
+      default:
+         break;
+      }
+   }
+
+   return true;
+}
+
+static bool
+${pass_name}_impl(nir_function_impl *impl, const bool *condition_flags)
+{
+   struct opt_state state;
+
+   state.mem_ctx = ralloc_parent(impl);
+   state.progress = false;
+   state.condition_flags = condition_flags;
+
+   nir_foreach_block(impl, ${pass_name}_block, &state);
+
+   if (state.progress)
+      nir_metadata_preserve(impl, nir_metadata_block_index |
+                                  nir_metadata_dominance);
+
+   return state.progress;
+}
+
+
+bool
+${pass_name}(nir_shader *shader)
+{
+   bool progress = false;
+   bool condition_flags[${len(condition_list)}];
+   const nir_shader_compiler_options *options = shader->options;
+
+   % for index, condition in enumerate(condition_list):
+   condition_flags[${index}] = ${condition};
+   % endfor
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         progress |= ${pass_name}_impl(function->impl, condition_flags);
+   }
+
+   return progress;
+}
+""")
+
+class AlgebraicPass(object):
+   def __init__(self, pass_name, transforms):
+      self.xform_dict = {}
+      self.pass_name = pass_name
+
+      for xform in transforms:
+         if not isinstance(xform, SearchAndReplace):
+            xform = SearchAndReplace(xform)
+
+         if xform.search.opcode not in self.xform_dict:
+            self.xform_dict[xform.search.opcode] = []
+
+         self.xform_dict[xform.search.opcode].append(xform)
+
+   def render(self):
+      return _algebraic_pass_template.render(pass_name=self.pass_name,
+                                             xform_dict=self.xform_dict,
+                                             condition_list=condition_list)
diff --git a/src/compiler/nir/nir_array.h b/src/compiler/nir/nir_array.h
new file mode 100644
index 00000000000..1db4e8cea36
--- /dev/null
+++ b/src/compiler/nir/nir_array.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+   void *mem_ctx;
+   size_t size;
+   size_t alloc;
+   void *data;
+} nir_array;
+
+static inline void
+nir_array_init(nir_array *arr, void *mem_ctx)
+{
+   arr->mem_ctx = mem_ctx;
+   arr->size = 0;
+   arr->alloc = 0;
+   arr->data = NULL;
+}
+
+static inline void
+nir_array_fini(nir_array *arr)
+{
+   if (arr->mem_ctx)
+      ralloc_free(arr->data);
+   else
+      free(arr->data);
+}
+
+#define NIR_ARRAY_INITIAL_SIZE 64
+
+/* Increments the size of the array by the given ammount and returns a
+ * pointer to the beginning of the newly added space.
+ */
+static inline void *
+nir_array_grow(nir_array *arr, size_t additional)
+{
+   size_t new_size = arr->size + additional;
+   if (new_size > arr->alloc) {
+      if (arr->alloc == 0)
+         arr->alloc = NIR_ARRAY_INITIAL_SIZE;
+
+      while (new_size > arr->alloc)
+         arr->alloc *= 2;
+
+      if (arr->mem_ctx)
+         arr->data = reralloc_size(arr->mem_ctx, arr->data, arr->alloc);
+      else
+         arr->data = realloc(arr->data, arr->alloc);
+   }
+
+   void *ptr = (void *)((char *)arr->data + arr->size);
+   arr->size = new_size;
+
+   return ptr;
+}
+
+#define nir_array_add(arr, type, elem) \
+   *(type *)nir_array_grow(arr, sizeof(type)) = (elem)
+
+#define nir_array_foreach(arr, type, elem) \
+   for (type *elem = (type *)(arr)->data; \
+        elem < (type *)((char *)(arr)->data + (arr)->size); elem++)
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
diff --git a/src/compiler/nir/nir_builder.h b/src/compiler/nir/nir_builder.h
new file mode 100644
index 00000000000..1c7c78acae8
--- /dev/null
+++ b/src/compiler/nir/nir_builder.h
@@ -0,0 +1,441 @@
+/*
+ * Copyright © 2014-2015 Broadcom
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef NIR_BUILDER_H
+#define NIR_BUILDER_H
+
+#include "nir_control_flow.h"
+
+struct exec_list;
+
+typedef struct nir_builder {
+   nir_cursor cursor;
+
+   nir_shader *shader;
+   nir_function_impl *impl;
+} nir_builder;
+
+static inline void
+nir_builder_init(nir_builder *build, nir_function_impl *impl)
+{
+   memset(build, 0, sizeof(*build));
+   build->impl = impl;
+   build->shader = impl->function->shader;
+}
+
+static inline void
+nir_builder_init_simple_shader(nir_builder *build, void *mem_ctx,
+                               gl_shader_stage stage,
+                               const nir_shader_compiler_options *options)
+{
+   build->shader = nir_shader_create(mem_ctx, stage, options);
+   nir_function *func = nir_function_create(build->shader, "main");
+   build->impl = nir_function_impl_create(func);
+   build->cursor = nir_after_cf_list(&build->impl->body);
+}
+
+static inline void
+nir_builder_instr_insert(nir_builder *build, nir_instr *instr)
+{
+   nir_instr_insert(build->cursor, instr);
+
+   /* Move the cursor forward. */
+   build->cursor = nir_after_instr(instr);
+}
+
+static inline void
+nir_builder_cf_insert(nir_builder *build, nir_cf_node *cf)
+{
+   nir_cf_node_insert(build->cursor, cf);
+}
+
+static inline nir_ssa_def *
+nir_ssa_undef(nir_builder *build, unsigned num_components)
+{
+   nir_ssa_undef_instr *undef =
+      nir_ssa_undef_instr_create(build->shader, num_components);
+   if (!undef)
+      return NULL;
+
+   nir_instr_insert(nir_before_block(nir_start_block(build->impl)),
+                    &undef->instr);
+
+   return &undef->def;
+}
+
+static inline nir_ssa_def *
+nir_build_imm(nir_builder *build, unsigned num_components, nir_const_value value)
+{
+   nir_load_const_instr *load_const =
+      nir_load_const_instr_create(build->shader, num_components);
+   if (!load_const)
+      return NULL;
+
+   load_const->value = value;
+
+   nir_builder_instr_insert(build, &load_const->instr);
+
+   return &load_const->def;
+}
+
+static inline nir_ssa_def *
+nir_imm_float(nir_builder *build, float x)
+{
+   nir_const_value v;
+
+   memset(&v, 0, sizeof(v));
+   v.f[0] = x;
+
+   return nir_build_imm(build, 1, v);
+}
+
+static inline nir_ssa_def *
+nir_imm_vec4(nir_builder *build, float x, float y, float z, float w)
+{
+   nir_const_value v;
+
+   memset(&v, 0, sizeof(v));
+   v.f[0] = x;
+   v.f[1] = y;
+   v.f[2] = z;
+   v.f[3] = w;
+
+   return nir_build_imm(build, 4, v);
+}
+
+static inline nir_ssa_def *
+nir_imm_int(nir_builder *build, int x)
+{
+   nir_const_value v;
+
+   memset(&v, 0, sizeof(v));
+   v.i[0] = x;
+
+   return nir_build_imm(build, 1, v);
+}
+
+static inline nir_ssa_def *
+nir_imm_ivec4(nir_builder *build, int x, int y, int z, int w)
+{
+   nir_const_value v;
+
+   memset(&v, 0, sizeof(v));
+   v.i[0] = x;
+   v.i[1] = y;
+   v.i[2] = z;
+   v.i[3] = w;
+
+   return nir_build_imm(build, 4, v);
+}
+
+static inline nir_ssa_def *
+nir_build_alu(nir_builder *build, nir_op op, nir_ssa_def *src0,
+              nir_ssa_def *src1, nir_ssa_def *src2, nir_ssa_def *src3)
+{
+   const nir_op_info *op_info = &nir_op_infos[op];
+   nir_alu_instr *instr = nir_alu_instr_create(build->shader, op);
+   if (!instr)
+      return NULL;
+
+   instr->src[0].src = nir_src_for_ssa(src0);
+   if (src1)
+      instr->src[1].src = nir_src_for_ssa(src1);
+   if (src2)
+      instr->src[2].src = nir_src_for_ssa(src2);
+   if (src3)
+      instr->src[3].src = nir_src_for_ssa(src3);
+
+   /* Guess the number of components the destination temporary should have
+    * based on our input sizes, if it's not fixed for the op.
+    */
+   unsigned num_components = op_info->output_size;
+   if (num_components == 0) {
+      for (unsigned i = 0; i < op_info->num_inputs; i++) {
+         if (op_info->input_sizes[i] == 0)
+            num_components = MAX2(num_components,
+                                  instr->src[i].src.ssa->num_components);
+      }
+   }
+   assert(num_components != 0);
+
+   /* Make sure we don't swizzle from outside of our source vector (like if a
+    * scalar value was passed into a multiply with a vector).
+    */
+   for (unsigned i = 0; i < op_info->num_inputs; i++) {
+      for (unsigned j = instr->src[i].src.ssa->num_components; j < 4; j++) {
+         instr->src[i].swizzle[j] = instr->src[i].src.ssa->num_components - 1;
+      }
+   }
+
+   nir_ssa_dest_init(&instr->instr, &instr->dest.dest, num_components, NULL);
+   instr->dest.write_mask = (1 << num_components) - 1;
+
+   nir_builder_instr_insert(build, &instr->instr);
+
+   return &instr->dest.dest.ssa;
+}
+
+#define ALU1(op)                                                          \
+static inline nir_ssa_def *                                               \
+nir_##op(nir_builder *build, nir_ssa_def *src0)                           \
+{                                                                         \
+   return nir_build_alu(build, nir_op_##op, src0, NULL, NULL, NULL);      \
+}
+
+#define ALU2(op)                                                          \
+static inline nir_ssa_def *                                               \
+nir_##op(nir_builder *build, nir_ssa_def *src0, nir_ssa_def *src1)        \
+{                                                                         \
+   return nir_build_alu(build, nir_op_##op, src0, src1, NULL, NULL);      \
+}
+
+#define ALU3(op)                                                          \
+static inline nir_ssa_def *                                               \
+nir_##op(nir_builder *build, nir_ssa_def *src0,                           \
+         nir_ssa_def *src1, nir_ssa_def *src2)                            \
+{                                                                         \
+   return nir_build_alu(build, nir_op_##op, src0, src1, src2, NULL);      \
+}
+
+#define ALU4(op)                                                          \
+static inline nir_ssa_def *                                               \
+nir_##op(nir_builder *build, nir_ssa_def *src0,                           \
+         nir_ssa_def *src1, nir_ssa_def *src2, nir_ssa_def *src3)         \
+{                                                                         \
+   return nir_build_alu(build, nir_op_##op, src0, src1, src2, src3);      \
+}
+
+#include "nir_builder_opcodes.h"
+
+static inline nir_ssa_def *
+nir_vec(nir_builder *build, nir_ssa_def **comp, unsigned num_components)
+{
+   switch (num_components) {
+   case 4:
+      return nir_vec4(build, comp[0], comp[1], comp[2], comp[3]);
+   case 3:
+      return nir_vec3(build, comp[0], comp[1], comp[2]);
+   case 2:
+      return nir_vec2(build, comp[0], comp[1]);
+   case 1:
+      return comp[0];
+   default:
+      unreachable("bad component count");
+      return NULL;
+   }
+}
+
+/**
+ * Similar to nir_fmov, but takes a nir_alu_src instead of a nir_ssa_def.
+ */
+static inline nir_ssa_def *
+nir_fmov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
+{
+   nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_fmov);
+   nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components, NULL);
+   mov->dest.write_mask = (1 << num_components) - 1;
+   mov->src[0] = src;
+   nir_builder_instr_insert(build, &mov->instr);
+
+   return &mov->dest.dest.ssa;
+}
+
+static inline nir_ssa_def *
+nir_imov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
+{
+   nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_imov);
+   nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components, NULL);
+   mov->dest.write_mask = (1 << num_components) - 1;
+   mov->src[0] = src;
+   nir_builder_instr_insert(build, &mov->instr);
+
+   return &mov->dest.dest.ssa;
+}
+
+/**
+ * Construct an fmov or imov that reswizzles the source's components.
+ */
+static inline nir_ssa_def *
+nir_swizzle(nir_builder *build, nir_ssa_def *src, unsigned swiz[4],
+            unsigned num_components, bool use_fmov)
+{
+   nir_alu_src alu_src = { NIR_SRC_INIT };
+   alu_src.src = nir_src_for_ssa(src);
+   for (unsigned i = 0; i < num_components; i++)
+      alu_src.swizzle[i] = swiz[i];
+
+   return use_fmov ? nir_fmov_alu(build, alu_src, num_components) :
+                     nir_imov_alu(build, alu_src, num_components);
+}
+
+/* Selects the right fdot given the number of components in each source. */
+static inline nir_ssa_def *
+nir_fdot(nir_builder *build, nir_ssa_def *src0, nir_ssa_def *src1)
+{
+   assert(src0->num_components == src1->num_components);
+   switch (src0->num_components) {
+   case 1: return nir_fmul(build, src0, src1);
+   case 2: return nir_fdot2(build, src0, src1);
+   case 3: return nir_fdot3(build, src0, src1);
+   case 4: return nir_fdot4(build, src0, src1);
+   default:
+      unreachable("bad component size");
+   }
+
+   return NULL;
+}
+
+static inline nir_ssa_def *
+nir_channel(nir_builder *b, nir_ssa_def *def, unsigned c)
+{
+   unsigned swizzle[4] = {c, c, c, c};
+   return nir_swizzle(b, def, swizzle, 1, false);
+}
+
+/**
+ * Turns a nir_src into a nir_ssa_def * so it can be passed to
+ * nir_build_alu()-based builder calls.
+ *
+ * See nir_ssa_for_alu_src() for alu instructions.
+ */
+static inline nir_ssa_def *
+nir_ssa_for_src(nir_builder *build, nir_src src, int num_components)
+{
+   if (src.is_ssa && src.ssa->num_components == num_components)
+      return src.ssa;
+
+   nir_alu_src alu = { NIR_SRC_INIT };
+   alu.src = src;
+   for (int j = 0; j < 4; j++)
+      alu.swizzle[j] = j;
+
+   return nir_imov_alu(build, alu, num_components);
+}
+
+/**
+ * Similar to nir_ssa_for_src(), but for alu src's, respecting the
+ * nir_alu_src's swizzle.
+ */
+static inline nir_ssa_def *
+nir_ssa_for_alu_src(nir_builder *build, nir_alu_instr *instr, unsigned srcn)
+{
+   static uint8_t trivial_swizzle[4] = { 0, 1, 2, 3 };
+   nir_alu_src *src = &instr->src[srcn];
+   unsigned num_components = nir_ssa_alu_instr_src_components(instr, srcn);
+
+   if (src->src.is_ssa && (src->src.ssa->num_components == num_components) &&
+       !src->abs && !src->negate &&
+       (memcmp(src->swizzle, trivial_swizzle, num_components) == 0))
+      return src->src.ssa;
+
+   return nir_imov_alu(build, *src, num_components);
+}
+
+static inline nir_ssa_def *
+nir_load_var(nir_builder *build, nir_variable *var)
+{
+   const unsigned num_components = glsl_get_vector_elements(var->type);
+
+   nir_intrinsic_instr *load =
+      nir_intrinsic_instr_create(build->shader, nir_intrinsic_load_var);
+   load->num_components = num_components;
+   load->variables[0] = nir_deref_var_create(load, var);
+   nir_ssa_dest_init(&load->instr, &load->dest, num_components, NULL);
+   nir_builder_instr_insert(build, &load->instr);
+   return &load->dest.ssa;
+}
+
+static inline void
+nir_store_var(nir_builder *build, nir_variable *var, nir_ssa_def *value,
+              unsigned writemask)
+{
+   const unsigned num_components = glsl_get_vector_elements(var->type);
+
+   nir_intrinsic_instr *store =
+      nir_intrinsic_instr_create(build->shader, nir_intrinsic_store_var);
+   store->num_components = num_components;
+   store->const_index[0] = writemask;
+   store->variables[0] = nir_deref_var_create(store, var);
+   store->src[0] = nir_src_for_ssa(value);
+   nir_builder_instr_insert(build, &store->instr);
+}
+
+static inline void
+nir_store_deref_var(nir_builder *build, nir_deref_var *deref,
+                    nir_ssa_def *value, unsigned writemask)
+{
+   const unsigned num_components =
+      glsl_get_vector_elements(nir_deref_tail(&deref->deref)->type);
+
+   nir_intrinsic_instr *store =
+      nir_intrinsic_instr_create(build->shader, nir_intrinsic_store_var);
+   store->num_components = num_components;
+   store->const_index[0] = writemask & ((1 << num_components) - 1);
+   store->variables[0] = nir_deref_as_var(nir_copy_deref(store, &deref->deref));
+   store->src[0] = nir_src_for_ssa(value);
+   nir_builder_instr_insert(build, &store->instr);
+}
+
+static inline void
+nir_copy_deref_var(nir_builder *build, nir_deref_var *dest, nir_deref_var *src)
+{
+   assert(nir_deref_tail(&dest->deref)->type ==
+          nir_deref_tail(&src->deref)->type);
+
+   nir_intrinsic_instr *copy =
+      nir_intrinsic_instr_create(build->shader, nir_intrinsic_copy_var);
+   copy->variables[0] = nir_deref_as_var(nir_copy_deref(copy, &dest->deref));
+   copy->variables[1] = nir_deref_as_var(nir_copy_deref(copy, &src->deref));
+   nir_builder_instr_insert(build, &copy->instr);
+}
+
+static inline void
+nir_copy_var(nir_builder *build, nir_variable *dest, nir_variable *src)
+{
+   nir_intrinsic_instr *copy =
+      nir_intrinsic_instr_create(build->shader, nir_intrinsic_copy_var);
+   copy->variables[0] = nir_deref_var_create(copy, dest);
+   copy->variables[1] = nir_deref_var_create(copy, src);
+   nir_builder_instr_insert(build, &copy->instr);
+}
+
+static inline nir_ssa_def *
+nir_load_system_value(nir_builder *build, nir_intrinsic_op op, int index)
+{
+   nir_intrinsic_instr *load = nir_intrinsic_instr_create(build->shader, op);
+   load->num_components = nir_intrinsic_infos[op].dest_components;
+   load->const_index[0] = index;
+   nir_ssa_dest_init(&load->instr, &load->dest,
+                     nir_intrinsic_infos[op].dest_components, NULL);
+   nir_builder_instr_insert(build, &load->instr);
+   return &load->dest.ssa;
+}
+
+static inline void
+nir_jump(nir_builder *build, nir_jump_type jump_type)
+{
+   nir_jump_instr *jump = nir_jump_instr_create(build->shader, jump_type);
+   nir_builder_instr_insert(build, &jump->instr);
+}
+
+#endif /* NIR_BUILDER_H */
diff --git a/src/compiler/nir/nir_builder_opcodes_h.py b/src/compiler/nir/nir_builder_opcodes_h.py
new file mode 100644
index 00000000000..e27206ea8fc
--- /dev/null
+++ b/src/compiler/nir/nir_builder_opcodes_h.py
@@ -0,0 +1,38 @@
+#! /usr/bin/env python
+
+template = """\
+/* Copyright (C) 2015 Broadcom
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef _NIR_BUILDER_OPCODES_
+#define _NIR_BUILDER_OPCODES_
+
+% for name, opcode in sorted(opcodes.iteritems()):
+ALU${opcode.num_inputs}(${name});
+% endfor
+
+#endif /* _NIR_BUILDER_OPCODES_ */"""
+
+from nir_opcodes import opcodes
+from mako.template import Template
+
+print Template(template).render(opcodes=opcodes)
diff --git a/src/compiler/nir/nir_clone.c b/src/compiler/nir/nir_clone.c
new file mode 100644
index 00000000000..bc6df56b753
--- /dev/null
+++ b/src/compiler/nir/nir_clone.c
@@ -0,0 +1,711 @@
+/*
+ * Copyright © 2015 Red Hat
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "nir.h"
+#include "nir_control_flow_private.h"
+
+/* Secret Decoder Ring:
+ *   clone_foo():
+ *        Allocate and clone a foo.
+ *   __clone_foo():
+ *        Clone body of foo (ie. parent class, embedded struct, etc)
+ */
+
+typedef struct {
+   /* True if we are cloning an entire shader. */
+   bool global_clone;
+
+   /* maps orig ptr -> cloned ptr: */
+   struct hash_table *remap_table;
+
+   /* List of phi sources. */
+   struct list_head phi_srcs;
+
+   /* new shader object, used as memctx for just about everything else: */
+   nir_shader *ns;
+} clone_state;
+
+static void
+init_clone_state(clone_state *state, bool global)
+{
+   state->global_clone = global;
+   state->remap_table = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
+                                                _mesa_key_pointer_equal);
+   list_inithead(&state->phi_srcs);
+}
+
+static void
+free_clone_state(clone_state *state)
+{
+   _mesa_hash_table_destroy(state->remap_table, NULL);
+}
+
+static inline void *
+_lookup_ptr(clone_state *state, const void *ptr, bool global)
+{
+   struct hash_entry *entry;
+
+   if (!ptr)
+      return NULL;
+
+   if (!state->global_clone && global)
+      return (void *)ptr;
+
+   entry = _mesa_hash_table_search(state->remap_table, ptr);
+   assert(entry && "Failed to find pointer!");
+   if (!entry)
+      return NULL;
+
+   return entry->data;
+}
+
+static void
+add_remap(clone_state *state, void *nptr, const void *ptr)
+{
+   _mesa_hash_table_insert(state->remap_table, ptr, nptr);
+}
+
+static void *
+remap_local(clone_state *state, const void *ptr)
+{
+   return _lookup_ptr(state, ptr, false);
+}
+
+static void *
+remap_global(clone_state *state, const void *ptr)
+{
+   return _lookup_ptr(state, ptr, true);
+}
+
+static nir_register *
+remap_reg(clone_state *state, const nir_register *reg)
+{
+   return _lookup_ptr(state, reg, reg->is_global);
+}
+
+static nir_variable *
+remap_var(clone_state *state, const nir_variable *var)
+{
+   return _lookup_ptr(state, var, var->data.mode != nir_var_local);
+}
+
+nir_constant *
+nir_constant_clone(const nir_constant *c, nir_variable *nvar)
+{
+   nir_constant *nc = ralloc(nvar, nir_constant);
+
+   nc->value = c->value;
+   nc->num_elements = c->num_elements;
+   nc->elements = ralloc_array(nvar, nir_constant *, c->num_elements);
+   for (unsigned i = 0; i < c->num_elements; i++) {
+      nc->elements[i] = nir_constant_clone(c->elements[i], nvar);
+   }
+
+   return nc;
+}
+
+/* NOTE: for cloning nir_variable's, bypass nir_variable_create to avoid
+ * having to deal with locals and globals separately:
+ */
+static nir_variable *
+clone_variable(clone_state *state, const nir_variable *var)
+{
+   nir_variable *nvar = rzalloc(state->ns, nir_variable);
+   add_remap(state, nvar, var);
+
+   nvar->type = var->type;
+   nvar->name = ralloc_strdup(nvar, var->name);
+   nvar->data = var->data;
+   nvar->num_state_slots = var->num_state_slots;
+   nvar->state_slots = ralloc_array(nvar, nir_state_slot, var->num_state_slots);
+   memcpy(nvar->state_slots, var->state_slots,
+          var->num_state_slots * sizeof(nir_state_slot));
+   if (var->constant_initializer) {
+      nvar->constant_initializer =
+         nir_constant_clone(var->constant_initializer, nvar);
+   }
+   nvar->interface_type = var->interface_type;
+
+   return nvar;
+}
+
+/* clone list of nir_variable: */
+static void
+clone_var_list(clone_state *state, struct exec_list *dst,
+               const struct exec_list *list)
+{
+   exec_list_make_empty(dst);
+   foreach_list_typed(nir_variable, var, node, list) {
+      nir_variable *nvar = clone_variable(state, var);
+      exec_list_push_tail(dst, &nvar->node);
+   }
+}
+
+/* NOTE: for cloning nir_register's, bypass nir_global/local_reg_create()
+ * to avoid having to deal with locals and globals separately:
+ */
+static nir_register *
+clone_register(clone_state *state, const nir_register *reg)
+{
+   nir_register *nreg = rzalloc(state->ns, nir_register);
+   add_remap(state, nreg, reg);
+
+   nreg->num_components = reg->num_components;
+   nreg->num_array_elems = reg->num_array_elems;
+   nreg->index = reg->index;
+   nreg->name = ralloc_strdup(nreg, reg->name);
+   nreg->is_global = reg->is_global;
+   nreg->is_packed = reg->is_packed;
+
+   /* reconstructing uses/defs/if_uses handled by nir_instr_insert() */
+   list_inithead(&nreg->uses);
+   list_inithead(&nreg->defs);
+   list_inithead(&nreg->if_uses);
+
+   return nreg;
+}
+
+/* clone list of nir_register: */
+static void
+clone_reg_list(clone_state *state, struct exec_list *dst,
+               const struct exec_list *list)
+{
+   exec_list_make_empty(dst);
+   foreach_list_typed(nir_register, reg, node, list) {
+      nir_register *nreg = clone_register(state, reg);
+      exec_list_push_tail(dst, &nreg->node);
+   }
+}
+
+static void
+__clone_src(clone_state *state, void *ninstr_or_if,
+            nir_src *nsrc, const nir_src *src)
+{
+   nsrc->is_ssa = src->is_ssa;
+   if (src->is_ssa) {
+      nsrc->ssa = remap_local(state, src->ssa);
+   } else {
+      nsrc->reg.reg = remap_reg(state, src->reg.reg);
+      if (src->reg.indirect) {
+         nsrc->reg.indirect = ralloc(ninstr_or_if, nir_src);
+         __clone_src(state, ninstr_or_if, nsrc->reg.indirect, src->reg.indirect);
+      }
+      nsrc->reg.base_offset = src->reg.base_offset;
+   }
+}
+
+static void
+__clone_dst(clone_state *state, nir_instr *ninstr,
+            nir_dest *ndst, const nir_dest *dst)
+{
+   ndst->is_ssa = dst->is_ssa;
+   if (dst->is_ssa) {
+      nir_ssa_dest_init(ninstr, ndst, dst->ssa.num_components, dst->ssa.name);
+      add_remap(state, &ndst->ssa, &dst->ssa);
+   } else {
+      ndst->reg.reg = remap_reg(state, dst->reg.reg);
+      if (dst->reg.indirect) {
+         ndst->reg.indirect = ralloc(ninstr, nir_src);
+         __clone_src(state, ninstr, ndst->reg.indirect, dst->reg.indirect);
+      }
+      ndst->reg.base_offset = dst->reg.base_offset;
+   }
+}
+
+static nir_deref *clone_deref(clone_state *state, const nir_deref *deref,
+                              nir_instr *ninstr, nir_deref *parent);
+
+static nir_deref_var *
+clone_deref_var(clone_state *state, const nir_deref_var *dvar,
+                nir_instr *ninstr)
+{
+   nir_variable *nvar = remap_var(state, dvar->var);
+   nir_deref_var *ndvar = nir_deref_var_create(ninstr, nvar);
+
+   if (dvar->deref.child)
+      ndvar->deref.child = clone_deref(state, dvar->deref.child,
+                                       ninstr, &ndvar->deref);
+
+   return ndvar;
+}
+
+static nir_deref_array *
+clone_deref_array(clone_state *state, const nir_deref_array *darr,
+                  nir_instr *ninstr, nir_deref *parent)
+{
+   nir_deref_array *ndarr = nir_deref_array_create(parent);
+
+   ndarr->deref.type = darr->deref.type;
+   if (darr->deref.child)
+      ndarr->deref.child = clone_deref(state, darr->deref.child,
+                                       ninstr, &ndarr->deref);
+
+   ndarr->deref_array_type = darr->deref_array_type;
+   ndarr->base_offset = darr->base_offset;
+   if (ndarr->deref_array_type == nir_deref_array_type_indirect)
+      __clone_src(state, ninstr, &ndarr->indirect, &darr->indirect);
+
+   return ndarr;
+}
+
+static nir_deref_struct *
+clone_deref_struct(clone_state *state, const nir_deref_struct *dstr,
+                   nir_instr *ninstr, nir_deref *parent)
+{
+   nir_deref_struct *ndstr = nir_deref_struct_create(parent, dstr->index);
+
+   ndstr->deref.type = dstr->deref.type;
+   if (dstr->deref.child)
+      ndstr->deref.child = clone_deref(state, dstr->deref.child,
+                                       ninstr, &ndstr->deref);
+
+   return ndstr;
+}
+
+static nir_deref *
+clone_deref(clone_state *state, const nir_deref *dref,
+            nir_instr *ninstr, nir_deref *parent)
+{
+   switch (dref->deref_type) {
+   case nir_deref_type_array:
+      return &clone_deref_array(state, nir_deref_as_array(dref),
+                                ninstr, parent)->deref;
+   case nir_deref_type_struct:
+      return &clone_deref_struct(state, nir_deref_as_struct(dref),
+                                 ninstr, parent)->deref;
+   default:
+      unreachable("bad deref type");
+      return NULL;
+   }
+}
+
+static nir_alu_instr *
+clone_alu(clone_state *state, const nir_alu_instr *alu)
+{
+   nir_alu_instr *nalu = nir_alu_instr_create(state->ns, alu->op);
+
+   __clone_dst(state, &nalu->instr, &nalu->dest.dest, &alu->dest.dest);
+   nalu->dest.saturate = alu->dest.saturate;
+   nalu->dest.write_mask = alu->dest.write_mask;
+
+   for (unsigned i = 0; i < nir_op_infos[alu->op].num_inputs; i++) {
+      __clone_src(state, &nalu->instr, &nalu->src[i].src, &alu->src[i].src);
+      nalu->src[i].negate = alu->src[i].negate;
+      nalu->src[i].abs = alu->src[i].abs;
+      memcpy(nalu->src[i].swizzle, alu->src[i].swizzle,
+             sizeof(nalu->src[i].swizzle));
+   }
+
+   return nalu;
+}
+
+static nir_intrinsic_instr *
+clone_intrinsic(clone_state *state, const nir_intrinsic_instr *itr)
+{
+   nir_intrinsic_instr *nitr =
+      nir_intrinsic_instr_create(state->ns, itr->intrinsic);
+
+   unsigned num_variables = nir_intrinsic_infos[itr->intrinsic].num_variables;
+   unsigned num_srcs = nir_intrinsic_infos[itr->intrinsic].num_srcs;
+
+   if (nir_intrinsic_infos[itr->intrinsic].has_dest)
+      __clone_dst(state, &nitr->instr, &nitr->dest, &itr->dest);
+
+   nitr->num_components = itr->num_components;
+   memcpy(nitr->const_index, itr->const_index, sizeof(nitr->const_index));
+
+   for (unsigned i = 0; i < num_variables; i++) {
+      nitr->variables[i] = clone_deref_var(state, itr->variables[i],
+                                           &nitr->instr);
+   }
+
+   for (unsigned i = 0; i < num_srcs; i++)
+      __clone_src(state, &nitr->instr, &nitr->src[i], &itr->src[i]);
+
+   return nitr;
+}
+
+static nir_load_const_instr *
+clone_load_const(clone_state *state, const nir_load_const_instr *lc)
+{
+   nir_load_const_instr *nlc =
+      nir_load_const_instr_create(state->ns, lc->def.num_components);
+
+   memcpy(&nlc->value, &lc->value, sizeof(nlc->value));
+
+   add_remap(state, &nlc->def, &lc->def);
+
+   return nlc;
+}
+
+static nir_ssa_undef_instr *
+clone_ssa_undef(clone_state *state, const nir_ssa_undef_instr *sa)
+{
+   nir_ssa_undef_instr *nsa =
+      nir_ssa_undef_instr_create(state->ns, sa->def.num_components);
+
+   add_remap(state, &nsa->def, &sa->def);
+
+   return nsa;
+}
+
+static nir_tex_instr *
+clone_tex(clone_state *state, const nir_tex_instr *tex)
+{
+   nir_tex_instr *ntex = nir_tex_instr_create(state->ns, tex->num_srcs);
+
+   ntex->sampler_dim = tex->sampler_dim;
+   ntex->dest_type = tex->dest_type;
+   ntex->op = tex->op;
+   __clone_dst(state, &ntex->instr, &ntex->dest, &tex->dest);
+   for (unsigned i = 0; i < ntex->num_srcs; i++) {
+      ntex->src[i].src_type = tex->src[i].src_type;
+      __clone_src(state, &ntex->instr, &ntex->src[i].src, &tex->src[i].src);
+   }
+   ntex->coord_components = tex->coord_components;
+   ntex->is_array = tex->is_array;
+   ntex->is_shadow = tex->is_shadow;
+   ntex->is_new_style_shadow = tex->is_new_style_shadow;
+   memcpy(ntex->const_offset, tex->const_offset, sizeof(ntex->const_offset));
+   ntex->component = tex->component;
+   ntex->texture_index = tex->texture_index;
+   ntex->texture_array_size = tex->texture_array_size;
+   if (tex->texture)
+      ntex->texture = clone_deref_var(state, tex->texture, &ntex->instr);
+   ntex->sampler_index = tex->sampler_index;
+   if (tex->sampler)
+      ntex->sampler = clone_deref_var(state, tex->sampler, &ntex->instr);
+
+   return ntex;
+}
+
+static nir_phi_instr *
+clone_phi(clone_state *state, const nir_phi_instr *phi, nir_block *nblk)
+{
+   nir_phi_instr *nphi = nir_phi_instr_create(state->ns);
+
+   __clone_dst(state, &nphi->instr, &nphi->dest, &phi->dest);
+
+   /* Cloning a phi node is a bit different from other instructions.  The
+    * sources of phi instructions are the only time where we can use an SSA
+    * def before it is defined.  In order to handle this, we just copy over
+    * the sources from the old phi instruction directly and then fix them up
+    * in a second pass once all the instrutions in the function have been
+    * properly cloned.
+    *
+    * In order to ensure that the copied sources (which are the same as the
+    * old phi instruction's sources for now) don't get inserted into the old
+    * shader's use-def lists, we have to add the phi instruction *before* we
+    * set up its sources.
+    */
+   nir_instr_insert_after_block(nblk, &nphi->instr);
+
+   foreach_list_typed(nir_phi_src, src, node, &phi->srcs) {
+      nir_phi_src *nsrc = ralloc(nphi, nir_phi_src);
+
+      /* Just copy the old source for now. */
+      memcpy(nsrc, src, sizeof(*src));
+
+      /* Since we're not letting nir_insert_instr handle use/def stuff for us,
+       * we have to set the parent_instr manually.  It doesn't really matter
+       * when we do it, so we might as well do it here.
+       */
+      nsrc->src.parent_instr = &nphi->instr;
+
+      /* Stash it in the list of phi sources.  We'll walk this list and fix up
+       * sources at the very end of clone_function_impl.
+       */
+      list_add(&nsrc->src.use_link, &state->phi_srcs);
+
+      exec_list_push_tail(&nphi->srcs, &nsrc->node);
+   }
+
+   return nphi;
+}
+
+static nir_jump_instr *
+clone_jump(clone_state *state, const nir_jump_instr *jmp)
+{
+   nir_jump_instr *njmp = nir_jump_instr_create(state->ns, jmp->type);
+
+   return njmp;
+}
+
+static nir_call_instr *
+clone_call(clone_state *state, const nir_call_instr *call)
+{
+   nir_function *ncallee = remap_global(state, call->callee);
+   nir_call_instr *ncall = nir_call_instr_create(state->ns, ncallee);
+
+   for (unsigned i = 0; i < ncall->num_params; i++)
+      ncall->params[i] = clone_deref_var(state, call->params[i], &ncall->instr);
+
+   ncall->return_deref = clone_deref_var(state, call->return_deref,
+                                         &ncall->instr);
+
+   return ncall;
+}
+
+static nir_instr *
+clone_instr(clone_state *state, const nir_instr *instr)
+{
+   switch (instr->type) {
+   case nir_instr_type_alu:
+      return &clone_alu(state, nir_instr_as_alu(instr))->instr;
+   case nir_instr_type_intrinsic:
+      return &clone_intrinsic(state, nir_instr_as_intrinsic(instr))->instr;
+   case nir_instr_type_load_const:
+      return &clone_load_const(state, nir_instr_as_load_const(instr))->instr;
+   case nir_instr_type_ssa_undef:
+      return &clone_ssa_undef(state, nir_instr_as_ssa_undef(instr))->instr;
+   case nir_instr_type_tex:
+      return &clone_tex(state, nir_instr_as_tex(instr))->instr;
+   case nir_instr_type_phi:
+      unreachable("Cannot clone phis with clone_instr");
+   case nir_instr_type_jump:
+      return &clone_jump(state, nir_instr_as_jump(instr))->instr;
+   case nir_instr_type_call:
+      return &clone_call(state, nir_instr_as_call(instr))->instr;
+   case nir_instr_type_parallel_copy:
+      unreachable("Cannot clone parallel copies");
+   default:
+      unreachable("bad instr type");
+      return NULL;
+   }
+}
+
+static nir_block *
+clone_block(clone_state *state, struct exec_list *cf_list, const nir_block *blk)
+{
+   /* Don't actually create a new block.  Just use the one from the tail of
+    * the list.  NIR guarantees that the tail of the list is a block and that
+    * no two blocks are side-by-side in the IR;  It should be empty.
+    */
+   nir_block *nblk =
+      exec_node_data(nir_block, exec_list_get_tail(cf_list), cf_node.node);
+   assert(nblk->cf_node.type == nir_cf_node_block);
+   assert(exec_list_is_empty(&nblk->instr_list));
+
+   /* We need this for phi sources */
+   add_remap(state, nblk, blk);
+
+   nir_foreach_instr(blk, instr) {
+      if (instr->type == nir_instr_type_phi) {
+         /* Phi instructions are a bit of a special case when cloning because
+          * we don't want inserting the instruction to automatically handle
+          * use/defs for us.  Instead, we need to wait until all the
+          * blocks/instructions are in so that we can set their sources up.
+          */
+         clone_phi(state, nir_instr_as_phi(instr), nblk);
+      } else {
+         nir_instr *ninstr = clone_instr(state, instr);
+         nir_instr_insert_after_block(nblk, ninstr);
+      }
+   }
+
+   return nblk;
+}
+
+static void
+clone_cf_list(clone_state *state, struct exec_list *dst,
+              const struct exec_list *list);
+
+static nir_if *
+clone_if(clone_state *state, struct exec_list *cf_list, const nir_if *i)
+{
+   nir_if *ni = nir_if_create(state->ns);
+
+   __clone_src(state, ni, &ni->condition, &i->condition);
+
+   nir_cf_node_insert_end(cf_list, &ni->cf_node);
+
+   clone_cf_list(state, &ni->then_list, &i->then_list);
+   clone_cf_list(state, &ni->else_list, &i->else_list);
+
+   return ni;
+}
+
+static nir_loop *
+clone_loop(clone_state *state, struct exec_list *cf_list, const nir_loop *loop)
+{
+   nir_loop *nloop = nir_loop_create(state->ns);
+
+   nir_cf_node_insert_end(cf_list, &nloop->cf_node);
+
+   clone_cf_list(state, &nloop->body, &loop->body);
+
+   return nloop;
+}
+
+/* clone list of nir_cf_node: */
+static void
+clone_cf_list(clone_state *state, struct exec_list *dst,
+              const struct exec_list *list)
+{
+   foreach_list_typed(nir_cf_node, cf, node, list) {
+      switch (cf->type) {
+      case nir_cf_node_block:
+         clone_block(state, dst, nir_cf_node_as_block(cf));
+         break;
+      case nir_cf_node_if:
+         clone_if(state, dst, nir_cf_node_as_if(cf));
+         break;
+      case nir_cf_node_loop:
+         clone_loop(state, dst, nir_cf_node_as_loop(cf));
+         break;
+      default:
+         unreachable("bad cf type");
+      }
+   }
+}
+
+static nir_function_impl *
+clone_function_impl(clone_state *state, const nir_function_impl *fi)
+{
+   nir_function_impl *nfi = nir_function_impl_create_bare(state->ns);
+
+   clone_var_list(state, &nfi->locals, &fi->locals);
+   clone_reg_list(state, &nfi->registers, &fi->registers);
+   nfi->reg_alloc = fi->reg_alloc;
+
+   nfi->num_params = fi->num_params;
+   nfi->params = ralloc_array(state->ns, nir_variable *, fi->num_params);
+   for (unsigned i = 0; i < fi->num_params; i++) {
+      nfi->params[i] = remap_local(state, fi->params[i]);
+   }
+   nfi->return_var = remap_local(state, fi->return_var);
+
+   assert(list_empty(&state->phi_srcs));
+
+   clone_cf_list(state, &nfi->body, &fi->body);
+
+   /* After we've cloned almost everything, we have to walk the list of phi
+    * sources and fix them up.  Thanks to loops, the block and SSA value for a
+    * phi source may not be defined when we first encounter it.  Instead, we
+    * add it to the phi_srcs list and we fix it up here.
+    */
+   list_for_each_entry_safe(nir_phi_src, src, &state->phi_srcs, src.use_link) {
+      src->pred = remap_local(state, src->pred);
+      assert(src->src.is_ssa);
+      src->src.ssa = remap_local(state, src->src.ssa);
+
+      /* Remove from this list and place in the uses of the SSA def */
+      list_del(&src->src.use_link);
+      list_addtail(&src->src.use_link, &src->src.ssa->uses);
+   }
+   assert(list_empty(&state->phi_srcs));
+
+   /* All metadata is invalidated in the cloning process */
+   nfi->valid_metadata = 0;
+
+   return nfi;
+}
+
+nir_function_impl *
+nir_function_impl_clone(const nir_function_impl *fi)
+{
+   clone_state state;
+   init_clone_state(&state, false);
+
+   /* We use the same shader */
+   state.ns = fi->function->shader;
+
+   nir_function_impl *nfi = clone_function_impl(&state, fi);
+
+   free_clone_state(&state);
+
+   return nfi;
+}
+
+static nir_function *
+clone_function(clone_state *state, const nir_function *fxn, nir_shader *ns)
+{
+   assert(ns == state->ns);
+   nir_function *nfxn = nir_function_create(ns, fxn->name);
+
+   /* Needed for call instructions */
+   add_remap(state, nfxn, fxn);
+
+   nfxn->num_params = fxn->num_params;
+   nfxn->params = ralloc_array(state->ns, nir_parameter, fxn->num_params);
+   memcpy(nfxn->params, fxn->params, sizeof(nir_parameter) * fxn->num_params);
+
+   nfxn->return_type = fxn->return_type;
+
+   /* At first glance, it looks like we should clone the function_impl here.
+    * However, call instructions need to be able to reference at least the
+    * function and those will get processed as we clone the function_impl's.
+    * We stop here and do function_impls as a second pass.
+    */
+
+   return nfxn;
+}
+
+nir_shader *
+nir_shader_clone(void *mem_ctx, const nir_shader *s)
+{
+   clone_state state;
+   init_clone_state(&state, true);
+
+   nir_shader *ns = nir_shader_create(mem_ctx, s->stage, s->options);
+   state.ns = ns;
+
+   clone_var_list(&state, &ns->uniforms, &s->uniforms);
+   clone_var_list(&state, &ns->inputs,   &s->inputs);
+   clone_var_list(&state, &ns->outputs,  &s->outputs);
+   clone_var_list(&state, &ns->shared,   &s->shared);
+   clone_var_list(&state, &ns->globals,  &s->globals);
+   clone_var_list(&state, &ns->system_values, &s->system_values);
+
+   /* Go through and clone functions */
+   foreach_list_typed(nir_function, fxn, node, &s->functions)
+      clone_function(&state, fxn, ns);
+
+   /* Only after all functions are cloned can we clone the actual function
+    * implementations.  This is because nir_call_instr's need to reference the
+    * functions of other functions and we don't know what order the functions
+    * will have in the list.
+    */
+   nir_foreach_function(s, fxn) {
+      nir_function *nfxn = remap_global(&state, fxn);
+      nfxn->impl = clone_function_impl(&state, fxn->impl);
+      nfxn->impl->function = nfxn;
+   }
+
+   clone_reg_list(&state, &ns->registers, &s->registers);
+   ns->reg_alloc = s->reg_alloc;
+
+   ns->info = s->info;
+   ns->info.name = ralloc_strdup(ns, ns->info.name);
+   if (ns->info.label)
+      ns->info.label = ralloc_strdup(ns, ns->info.label);
+
+   ns->num_inputs = s->num_inputs;
+   ns->num_uniforms = s->num_uniforms;
+   ns->num_outputs = s->num_outputs;
+   ns->num_shared = s->num_shared;
+
+   free_clone_state(&state);
+
+   return ns;
+}
diff --git a/src/compiler/nir/nir_constant_expressions.h b/src/compiler/nir/nir_constant_expressions.h
new file mode 100644
index 00000000000..97997f2e514
--- /dev/null
+++ b/src/compiler/nir/nir_constant_expressions.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright © 2014 Connor Abbott
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+
+nir_const_value nir_eval_const_opcode(nir_op op, unsigned num_components,
+                                      nir_const_value *src);
diff --git a/src/compiler/nir/nir_constant_expressions.py b/src/compiler/nir/nir_constant_expressions.py
new file mode 100644
index 00000000000..32784f6398d
--- /dev/null
+++ b/src/compiler/nir/nir_constant_expressions.py
@@ -0,0 +1,336 @@
+#! /usr/bin/python2
+template = """\
+/*
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ */
+
+#include <math.h>
+#include "main/core.h"
+#include "util/rounding.h" /* for _mesa_roundeven */
+#include "util/half_float.h"
+#include "nir_constant_expressions.h"
+
+/**
+ * Evaluate one component of packSnorm4x8.
+ */
+static uint8_t
+pack_snorm_1x8(float x)
+{
+    /* From section 8.4 of the GLSL 4.30 spec:
+     *
+     *    packSnorm4x8
+     *    ------------
+     *    The conversion for component c of v to fixed point is done as
+     *    follows:
+     *
+     *      packSnorm4x8: round(clamp(c, -1, +1) * 127.0)
+     *
+     * We must first cast the float to an int, because casting a negative
+     * float to a uint is undefined.
+     */
+   return (uint8_t) (int)
+          _mesa_roundevenf(CLAMP(x, -1.0f, +1.0f) * 127.0f);
+}
+
+/**
+ * Evaluate one component of packSnorm2x16.
+ */
+static uint16_t
+pack_snorm_1x16(float x)
+{
+    /* From section 8.4 of the GLSL ES 3.00 spec:
+     *
+     *    packSnorm2x16
+     *    -------------
+     *    The conversion for component c of v to fixed point is done as
+     *    follows:
+     *
+     *      packSnorm2x16: round(clamp(c, -1, +1) * 32767.0)
+     *
+     * We must first cast the float to an int, because casting a negative
+     * float to a uint is undefined.
+     */
+   return (uint16_t) (int)
+          _mesa_roundevenf(CLAMP(x, -1.0f, +1.0f) * 32767.0f);
+}
+
+/**
+ * Evaluate one component of unpackSnorm4x8.
+ */
+static float
+unpack_snorm_1x8(uint8_t u)
+{
+    /* From section 8.4 of the GLSL 4.30 spec:
+     *
+     *    unpackSnorm4x8
+     *    --------------
+     *    The conversion for unpacked fixed-point value f to floating point is
+     *    done as follows:
+     *
+     *       unpackSnorm4x8: clamp(f / 127.0, -1, +1)
+     */
+   return CLAMP((int8_t) u / 127.0f, -1.0f, +1.0f);
+}
+
+/**
+ * Evaluate one component of unpackSnorm2x16.
+ */
+static float
+unpack_snorm_1x16(uint16_t u)
+{
+    /* From section 8.4 of the GLSL ES 3.00 spec:
+     *
+     *    unpackSnorm2x16
+     *    ---------------
+     *    The conversion for unpacked fixed-point value f to floating point is
+     *    done as follows:
+     *
+     *       unpackSnorm2x16: clamp(f / 32767.0, -1, +1)
+     */
+   return CLAMP((int16_t) u / 32767.0f, -1.0f, +1.0f);
+}
+
+/**
+ * Evaluate one component packUnorm4x8.
+ */
+static uint8_t
+pack_unorm_1x8(float x)
+{
+    /* From section 8.4 of the GLSL 4.30 spec:
+     *
+     *    packUnorm4x8
+     *    ------------
+     *    The conversion for component c of v to fixed point is done as
+     *    follows:
+     *
+     *       packUnorm4x8: round(clamp(c, 0, +1) * 255.0)
+     */
+   return (uint8_t) (int)
+          _mesa_roundevenf(CLAMP(x, 0.0f, 1.0f) * 255.0f);
+}
+
+/**
+ * Evaluate one component packUnorm2x16.
+ */
+static uint16_t
+pack_unorm_1x16(float x)
+{
+    /* From section 8.4 of the GLSL ES 3.00 spec:
+     *
+     *    packUnorm2x16
+     *    -------------
+     *    The conversion for component c of v to fixed point is done as
+     *    follows:
+     *
+     *       packUnorm2x16: round(clamp(c, 0, +1) * 65535.0)
+     */
+   return (uint16_t) (int)
+          _mesa_roundevenf(CLAMP(x, 0.0f, 1.0f) * 65535.0f);
+}
+
+/**
+ * Evaluate one component of unpackUnorm4x8.
+ */
+static float
+unpack_unorm_1x8(uint8_t u)
+{
+    /* From section 8.4 of the GLSL 4.30 spec:
+     *
+     *    unpackUnorm4x8
+     *    --------------
+     *    The conversion for unpacked fixed-point value f to floating point is
+     *    done as follows:
+     *
+     *       unpackUnorm4x8: f / 255.0
+     */
+   return (float) u / 255.0f;
+}
+
+/**
+ * Evaluate one component of unpackUnorm2x16.
+ */
+static float
+unpack_unorm_1x16(uint16_t u)
+{
+    /* From section 8.4 of the GLSL ES 3.00 spec:
+     *
+     *    unpackUnorm2x16
+     *    ---------------
+     *    The conversion for unpacked fixed-point value f to floating point is
+     *    done as follows:
+     *
+     *       unpackUnorm2x16: f / 65535.0
+     */
+   return (float) u / 65535.0f;
+}
+
+/**
+ * Evaluate one component of packHalf2x16.
+ */
+static uint16_t
+pack_half_1x16(float x)
+{
+   return _mesa_float_to_half(x);
+}
+
+/**
+ * Evaluate one component of unpackHalf2x16.
+ */
+static float
+unpack_half_1x16(uint16_t u)
+{
+   return _mesa_half_to_float(u);
+}
+
+/* Some typed vector structures to make things like src0.y work */
+% for type in ["float", "int", "uint", "bool"]:
+struct ${type}_vec {
+   ${type} x;
+   ${type} y;
+   ${type} z;
+   ${type} w;
+};
+% endfor
+
+% for name, op in sorted(opcodes.iteritems()):
+static nir_const_value
+evaluate_${name}(unsigned num_components, nir_const_value *_src)
+{
+   nir_const_value _dst_val = { { {0, 0, 0, 0} } };
+
+   ## For each non-per-component input, create a variable srcN that
+   ## contains x, y, z, and w elements which are filled in with the
+   ## appropriately-typed values.
+   % for j in range(op.num_inputs):
+      % if op.input_sizes[j] == 0:
+         <% continue %>
+      % elif "src" + str(j) not in op.const_expr:
+         ## Avoid unused variable warnings
+         <% continue %>
+      %endif
+
+      struct ${op.input_types[j]}_vec src${j} = {
+      % for k in range(op.input_sizes[j]):
+         % if op.input_types[j] == "bool":
+            _src[${j}].u[${k}] != 0,
+         % else:
+            _src[${j}].${op.input_types[j][:1]}[${k}],
+         % endif
+      % endfor
+      };
+   % endfor
+
+   % if op.output_size == 0:
+      ## For per-component instructions, we need to iterate over the
+      ## components and apply the constant expression one component
+      ## at a time.
+      for (unsigned _i = 0; _i < num_components; _i++) {
+         ## For each per-component input, create a variable srcN that
+         ## contains the value of the current (_i'th) component.
+         % for j in range(op.num_inputs):
+            % if op.input_sizes[j] != 0:
+               <% continue %>
+            % elif "src" + str(j) not in op.const_expr:
+               ## Avoid unused variable warnings
+               <% continue %>
+            % elif op.input_types[j] == "bool":
+               bool src${j} = _src[${j}].u[_i] != 0;
+            % else:
+               ${op.input_types[j]} src${j} = _src[${j}].${op.input_types[j][:1]}[_i];
+            % endif
+         % endfor
+
+         ## Create an appropriately-typed variable dst and assign the
+         ## result of the const_expr to it.  If const_expr already contains
+         ## writes to dst, just include const_expr directly.
+         % if "dst" in op.const_expr:
+            ${op.output_type} dst;
+            ${op.const_expr}
+         % else:
+            ${op.output_type} dst = ${op.const_expr};
+         % endif
+
+         ## Store the current component of the actual destination to the
+         ## value of dst.
+         % if op.output_type == "bool":
+            ## Sanitize the C value to a proper NIR bool
+            _dst_val.u[_i] = dst ? NIR_TRUE : NIR_FALSE;
+         % else:
+            _dst_val.${op.output_type[:1]}[_i] = dst;
+         % endif
+      }
+   % else:
+      ## In the non-per-component case, create a struct dst with
+      ## appropriately-typed elements x, y, z, and w and assign the result
+      ## of the const_expr to all components of dst, or include the
+      ## const_expr directly if it writes to dst already.
+      struct ${op.output_type}_vec dst;
+
+      % if "dst" in op.const_expr:
+         ${op.const_expr}
+      % else:
+         ## Splat the value to all components.  This way expressions which
+         ## write the same value to all components don't need to explicitly
+         ## write to dest.  One such example is fnoise which has a
+         ## const_expr of 0.0f.
+         dst.x = dst.y = dst.z = dst.w = ${op.const_expr};
+      % endif
+
+      ## For each component in the destination, copy the value of dst to
+      ## the actual destination.
+      % for k in range(op.output_size):
+         % if op.output_type == "bool":
+            ## Sanitize the C value to a proper NIR bool
+            _dst_val.u[${k}] = dst.${"xyzw"[k]} ? NIR_TRUE : NIR_FALSE;
+         % else:
+            _dst_val.${op.output_type[:1]}[${k}] = dst.${"xyzw"[k]};
+         % endif
+      % endfor
+   % endif
+
+   return _dst_val;
+}
+% endfor
+
+nir_const_value
+nir_eval_const_opcode(nir_op op, unsigned num_components,
+                      nir_const_value *src)
+{
+   switch (op) {
+% for name in sorted(opcodes.iterkeys()):
+   case nir_op_${name}: {
+      return evaluate_${name}(num_components, src);
+      break;
+   }
+% endfor
+   default:
+      unreachable("shouldn't get here");
+   }
+}"""
+
+from nir_opcodes import opcodes
+from mako.template import Template
+
+print Template(template).render(opcodes=opcodes)
diff --git a/src/compiler/nir/nir_control_flow.c b/src/compiler/nir/nir_control_flow.c
new file mode 100644
index 00000000000..33b06d0cc84
--- /dev/null
+++ b/src/compiler/nir/nir_control_flow.c
@@ -0,0 +1,820 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir_control_flow_private.h"
+
+/**
+ * \name Control flow modification
+ *
+ * These functions modify the control flow tree while keeping the control flow
+ * graph up-to-date. The invariants respected are:
+ * 1. Each then statement, else statement, or loop body must have at least one
+ *    control flow node.
+ * 2. Each if-statement and loop must have one basic block before it and one
+ *    after.
+ * 3. Two basic blocks cannot be directly next to each other.
+ * 4. If a basic block has a jump instruction, there must be only one and it
+ *    must be at the end of the block.
+ * 5. The CFG must always be connected - this means that we must insert a fake
+ *    CFG edge for loops with no break statement.
+ *
+ * The purpose of the second one is so that we have places to insert code during
+ * GCM, as well as eliminating the possibility of critical edges.
+ */
+/*@{*/
+
+static bool
+block_ends_in_jump(nir_block *block)
+{
+   return !exec_list_is_empty(&block->instr_list) &&
+          nir_block_last_instr(block)->type == nir_instr_type_jump;
+}
+
+static inline void
+block_add_pred(nir_block *block, nir_block *pred)
+{
+   _mesa_set_add(block->predecessors, pred);
+}
+
+static inline void
+block_remove_pred(nir_block *block, nir_block *pred)
+{
+   struct set_entry *entry = _mesa_set_search(block->predecessors, pred);
+
+   assert(entry);
+
+   _mesa_set_remove(block->predecessors, entry);
+}
+
+static void
+link_blocks(nir_block *pred, nir_block *succ1, nir_block *succ2)
+{
+   pred->successors[0] = succ1;
+   if (succ1 != NULL)
+      block_add_pred(succ1, pred);
+
+   pred->successors[1] = succ2;
+   if (succ2 != NULL)
+      block_add_pred(succ2, pred);
+}
+
+static void
+unlink_blocks(nir_block *pred, nir_block *succ)
+{
+   if (pred->successors[0] == succ) {
+      pred->successors[0] = pred->successors[1];
+      pred->successors[1] = NULL;
+   } else {
+      assert(pred->successors[1] == succ);
+      pred->successors[1] = NULL;
+   }
+
+   block_remove_pred(succ, pred);
+}
+
+static void
+unlink_block_successors(nir_block *block)
+{
+   if (block->successors[1] != NULL)
+      unlink_blocks(block, block->successors[1]);
+   if (block->successors[0] != NULL)
+      unlink_blocks(block, block->successors[0]);
+}
+
+static void
+link_non_block_to_block(nir_cf_node *node, nir_block *block)
+{
+   if (node->type == nir_cf_node_if) {
+      /*
+       * We're trying to link an if to a block after it; this just means linking
+       * the last block of the then and else branches.
+       */
+
+      nir_if *if_stmt = nir_cf_node_as_if(node);
+
+      nir_cf_node *last_then = nir_if_last_then_node(if_stmt);
+      assert(last_then->type == nir_cf_node_block);
+      nir_block *last_then_block = nir_cf_node_as_block(last_then);
+
+      nir_cf_node *last_else = nir_if_last_else_node(if_stmt);
+      assert(last_else->type == nir_cf_node_block);
+      nir_block *last_else_block = nir_cf_node_as_block(last_else);
+
+      if (!block_ends_in_jump(last_then_block)) {
+         unlink_block_successors(last_then_block);
+         link_blocks(last_then_block, block, NULL);
+      }
+
+      if (!block_ends_in_jump(last_else_block)) {
+         unlink_block_successors(last_else_block);
+         link_blocks(last_else_block, block, NULL);
+      }
+   } else {
+      assert(node->type == nir_cf_node_loop);
+
+      /*
+       * We can only get to this codepath if we're inserting a new loop, or
+       * at least a loop with no break statements; we can't insert break
+       * statements into a loop when we haven't inserted it into the CFG
+       * because we wouldn't know which block comes after the loop
+       * and therefore, which block should be the successor of the block with
+       * the break). Therefore, we need to insert a fake edge (see invariant
+       * #5).
+       */
+
+      nir_loop *loop = nir_cf_node_as_loop(node);
+
+      nir_cf_node *last = nir_loop_last_cf_node(loop);
+      assert(last->type == nir_cf_node_block);
+      nir_block *last_block =  nir_cf_node_as_block(last);
+
+      last_block->successors[1] = block;
+      block_add_pred(block, last_block);
+   }
+}
+
+static void
+link_block_to_non_block(nir_block *block, nir_cf_node *node)
+{
+   if (node->type == nir_cf_node_if) {
+      /*
+       * We're trying to link a block to an if after it; this just means linking
+       * the block to the first block of the then and else branches.
+       */
+
+      nir_if *if_stmt = nir_cf_node_as_if(node);
+
+      nir_cf_node *first_then = nir_if_first_then_node(if_stmt);
+      assert(first_then->type == nir_cf_node_block);
+      nir_block *first_then_block = nir_cf_node_as_block(first_then);
+
+      nir_cf_node *first_else = nir_if_first_else_node(if_stmt);
+      assert(first_else->type == nir_cf_node_block);
+      nir_block *first_else_block = nir_cf_node_as_block(first_else);
+
+      unlink_block_successors(block);
+      link_blocks(block, first_then_block, first_else_block);
+   } else {
+      /*
+       * For similar reasons as the corresponding case in
+       * link_non_block_to_block(), don't worry about if the loop header has
+       * any predecessors that need to be unlinked.
+       */
+
+      assert(node->type == nir_cf_node_loop);
+
+      nir_loop *loop = nir_cf_node_as_loop(node);
+
+      nir_cf_node *loop_header = nir_loop_first_cf_node(loop);
+      assert(loop_header->type == nir_cf_node_block);
+      nir_block *loop_header_block = nir_cf_node_as_block(loop_header);
+
+      unlink_block_successors(block);
+      link_blocks(block, loop_header_block, NULL);
+   }
+
+}
+
+/**
+ * Replace a block's successor with a different one.
+ */
+static void
+replace_successor(nir_block *block, nir_block *old_succ, nir_block *new_succ)
+{
+   if (block->successors[0] == old_succ) {
+      block->successors[0] = new_succ;
+   } else {
+      assert(block->successors[1] == old_succ);
+      block->successors[1] = new_succ;
+   }
+
+   block_remove_pred(old_succ, block);
+   block_add_pred(new_succ, block);
+}
+
+/**
+ * Takes a basic block and inserts a new empty basic block before it, making its
+ * predecessors point to the new block. This essentially splits the block into
+ * an empty header and a body so that another non-block CF node can be inserted
+ * between the two. Note that this does *not* link the two basic blocks, so
+ * some kind of cleanup *must* be performed after this call.
+ */
+
+static nir_block *
+split_block_beginning(nir_block *block)
+{
+   nir_block *new_block = nir_block_create(ralloc_parent(block));
+   new_block->cf_node.parent = block->cf_node.parent;
+   exec_node_insert_node_before(&block->cf_node.node, &new_block->cf_node.node);
+
+   struct set_entry *entry;
+   set_foreach(block->predecessors, entry) {
+      nir_block *pred = (nir_block *) entry->key;
+      replace_successor(pred, block, new_block);
+   }
+
+   /* Any phi nodes must stay part of the new block, or else their
+    * sourcse will be messed up. This will reverse the order of the phi's, but
+    * order shouldn't matter.
+    */
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_phi)
+         break;
+
+      exec_node_remove(&instr->node);
+      instr->block = new_block;
+      exec_list_push_head(&new_block->instr_list, &instr->node);
+   }
+
+   return new_block;
+}
+
+static void
+rewrite_phi_preds(nir_block *block, nir_block *old_pred, nir_block *new_pred)
+{
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_phi)
+         break;
+
+      nir_phi_instr *phi = nir_instr_as_phi(instr);
+      nir_foreach_phi_src(phi, src) {
+         if (src->pred == old_pred) {
+            src->pred = new_pred;
+            break;
+         }
+      }
+   }
+}
+
+static void
+insert_phi_undef(nir_block *block, nir_block *pred)
+{
+   nir_function_impl *impl = nir_cf_node_get_function(&block->cf_node);
+   nir_foreach_instr(block, instr) {
+      if (instr->type != nir_instr_type_phi)
+         break;
+
+      nir_phi_instr *phi = nir_instr_as_phi(instr);
+      nir_ssa_undef_instr *undef =
+         nir_ssa_undef_instr_create(ralloc_parent(phi),
+                                    phi->dest.ssa.num_components);
+      nir_instr_insert_before_cf_list(&impl->body, &undef->instr);
+      nir_phi_src *src = ralloc(phi, nir_phi_src);
+      src->pred = pred;
+      src->src.parent_instr = &phi->instr;
+      src->src.is_ssa = true;
+      src->src.ssa = &undef->def;
+
+      list_addtail(&src->src.use_link, &undef->def.uses);
+
+      exec_list_push_tail(&phi->srcs, &src->node);
+   }
+}
+
+/**
+ * Moves the successors of source to the successors of dest, leaving both
+ * successors of source NULL.
+ */
+
+static void
+move_successors(nir_block *source, nir_block *dest)
+{
+   nir_block *succ1 = source->successors[0];
+   nir_block *succ2 = source->successors[1];
+
+   if (succ1) {
+      unlink_blocks(source, succ1);
+      rewrite_phi_preds(succ1, source, dest);
+   }
+
+   if (succ2) {
+      unlink_blocks(source, succ2);
+      rewrite_phi_preds(succ2, source, dest);
+   }
+
+   unlink_block_successors(dest);
+   link_blocks(dest, succ1, succ2);
+}
+
+/* Given a basic block with no successors that has been inserted into the
+ * control flow tree, gives it the successors it would normally have assuming
+ * it doesn't end in a jump instruction. Also inserts phi sources with undefs
+ * if necessary.
+ */
+static void
+block_add_normal_succs(nir_block *block)
+{
+   if (exec_node_is_tail_sentinel(block->cf_node.node.next)) {
+      nir_cf_node *parent = block->cf_node.parent;
+      if (parent->type == nir_cf_node_if) {
+         nir_cf_node *next = nir_cf_node_next(parent);
+         assert(next->type == nir_cf_node_block);
+         nir_block *next_block = nir_cf_node_as_block(next);
+
+         link_blocks(block, next_block, NULL);
+      } else if (parent->type == nir_cf_node_loop) {
+         nir_loop *loop = nir_cf_node_as_loop(parent);
+
+         nir_cf_node *head = nir_loop_first_cf_node(loop);
+         assert(head->type == nir_cf_node_block);
+         nir_block *head_block = nir_cf_node_as_block(head);
+
+         link_blocks(block, head_block, NULL);
+         insert_phi_undef(head_block, block);
+      } else {
+         assert(parent->type == nir_cf_node_function);
+         nir_function_impl *impl = nir_cf_node_as_function(parent);
+         link_blocks(block, impl->end_block, NULL);
+      }
+   } else {
+      nir_cf_node *next = nir_cf_node_next(&block->cf_node);
+      if (next->type == nir_cf_node_if) {
+         nir_if *next_if = nir_cf_node_as_if(next);
+
+         nir_cf_node *first_then = nir_if_first_then_node(next_if);
+         assert(first_then->type == nir_cf_node_block);
+         nir_block *first_then_block = nir_cf_node_as_block(first_then);
+
+         nir_cf_node *first_else = nir_if_first_else_node(next_if);
+         assert(first_else->type == nir_cf_node_block);
+         nir_block *first_else_block = nir_cf_node_as_block(first_else);
+
+         link_blocks(block, first_then_block, first_else_block);
+      } else {
+         assert(next->type == nir_cf_node_loop);
+         nir_loop *next_loop = nir_cf_node_as_loop(next);
+
+         nir_cf_node *first = nir_loop_first_cf_node(next_loop);
+         assert(first->type == nir_cf_node_block);
+         nir_block *first_block = nir_cf_node_as_block(first);
+
+         link_blocks(block, first_block, NULL);
+         insert_phi_undef(first_block, block);
+      }
+   }
+}
+
+static nir_block *
+split_block_end(nir_block *block)
+{
+   nir_block *new_block = nir_block_create(ralloc_parent(block));
+   new_block->cf_node.parent = block->cf_node.parent;
+   exec_node_insert_after(&block->cf_node.node, &new_block->cf_node.node);
+
+   if (block_ends_in_jump(block)) {
+      /* Figure out what successor block would've had if it didn't have a jump
+       * instruction, and make new_block have that successor.
+       */
+      block_add_normal_succs(new_block);
+   } else {
+      move_successors(block, new_block);
+   }
+
+   return new_block;
+}
+
+static nir_block *
+split_block_before_instr(nir_instr *instr)
+{
+   assert(instr->type != nir_instr_type_phi);
+   nir_block *new_block = split_block_beginning(instr->block);
+
+   nir_foreach_instr_safe(instr->block, cur_instr) {
+      if (cur_instr == instr)
+         break;
+
+      exec_node_remove(&cur_instr->node);
+      cur_instr->block = new_block;
+      exec_list_push_tail(&new_block->instr_list, &cur_instr->node);
+   }
+
+   return new_block;
+}
+
+/* Splits a basic block at the point specified by the cursor. The "before" and
+ * "after" arguments are filled out with the blocks resulting from the split
+ * if non-NULL. Note that the "beginning" of the block is actually interpreted
+ * as before the first non-phi instruction, and it's illegal to split a block
+ * before a phi instruction.
+ */
+
+static void
+split_block_cursor(nir_cursor cursor,
+                   nir_block **_before, nir_block **_after)
+{
+   nir_block *before, *after;
+   switch (cursor.option) {
+   case nir_cursor_before_block:
+      after = cursor.block;
+      before = split_block_beginning(cursor.block);
+      break;
+
+   case nir_cursor_after_block:
+      before = cursor.block;
+      after = split_block_end(cursor.block);
+      break;
+
+   case nir_cursor_before_instr:
+      after = cursor.instr->block;
+      before = split_block_before_instr(cursor.instr);
+      break;
+
+   case nir_cursor_after_instr:
+      /* We lower this to split_block_before_instr() so that we can keep the
+       * after-a-jump-instr case contained to split_block_end().
+       */
+      if (nir_instr_is_last(cursor.instr)) {
+         before = cursor.instr->block;
+         after = split_block_end(cursor.instr->block);
+      } else {
+         after = cursor.instr->block;
+         before = split_block_before_instr(nir_instr_next(cursor.instr));
+      }
+      break;
+
+   default:
+      unreachable("not reached");
+   }
+
+   if (_before)
+      *_before = before;
+   if (_after)
+      *_after = after;
+}
+
+/**
+ * Inserts a non-basic block between two basic blocks and links them together.
+ */
+
+static void
+insert_non_block(nir_block *before, nir_cf_node *node, nir_block *after)
+{
+   node->parent = before->cf_node.parent;
+   exec_node_insert_after(&before->cf_node.node, &node->node);
+   link_block_to_non_block(before, node);
+   link_non_block_to_block(node, after);
+}
+
+/* walk up the control flow tree to find the innermost enclosed loop */
+static nir_loop *
+nearest_loop(nir_cf_node *node)
+{
+   while (node->type != nir_cf_node_loop) {
+      node = node->parent;
+   }
+
+   return nir_cf_node_as_loop(node);
+}
+
+/*
+ * update the CFG after a jump instruction has been added to the end of a block
+ */
+
+void
+nir_handle_add_jump(nir_block *block)
+{
+   nir_instr *instr = nir_block_last_instr(block);
+   nir_jump_instr *jump_instr = nir_instr_as_jump(instr);
+
+   unlink_block_successors(block);
+
+   nir_function_impl *impl = nir_cf_node_get_function(&block->cf_node);
+   nir_metadata_preserve(impl, nir_metadata_none);
+
+   if (jump_instr->type == nir_jump_break ||
+       jump_instr->type == nir_jump_continue) {
+      nir_loop *loop = nearest_loop(&block->cf_node);
+
+      if (jump_instr->type == nir_jump_continue) {
+         nir_cf_node *first_node = nir_loop_first_cf_node(loop);
+         assert(first_node->type == nir_cf_node_block);
+         nir_block *first_block = nir_cf_node_as_block(first_node);
+         link_blocks(block, first_block, NULL);
+      } else {
+         nir_cf_node *after = nir_cf_node_next(&loop->cf_node);
+         assert(after->type == nir_cf_node_block);
+         nir_block *after_block = nir_cf_node_as_block(after);
+         link_blocks(block, after_block, NULL);
+
+         /* If we inserted a fake link, remove it */
+         nir_cf_node *last = nir_loop_last_cf_node(loop);
+         assert(last->type == nir_cf_node_block);
+         nir_block *last_block =  nir_cf_node_as_block(last);
+         if (last_block->successors[1] != NULL)
+            unlink_blocks(last_block, after_block);
+      }
+   } else {
+      assert(jump_instr->type == nir_jump_return);
+      link_blocks(block, impl->end_block, NULL);
+   }
+}
+
+static void
+remove_phi_src(nir_block *block, nir_block *pred)
+{
+   nir_foreach_instr(block, instr) {
+      if (instr->type != nir_instr_type_phi)
+         break;
+
+      nir_phi_instr *phi = nir_instr_as_phi(instr);
+      nir_foreach_phi_src_safe(phi, src) {
+         if (src->pred == pred) {
+            list_del(&src->src.use_link);
+            exec_node_remove(&src->node);
+         }
+      }
+   }
+}
+
+/* Removes the successor of a block with a jump, and inserts a fake edge for
+ * infinite loops. Note that the jump to be eliminated may be free-floating.
+ */
+
+static void
+unlink_jump(nir_block *block, nir_jump_type type, bool add_normal_successors)
+{
+   nir_block *next = block->successors[0];
+
+   if (block->successors[0])
+      remove_phi_src(block->successors[0], block);
+   if (block->successors[1])
+      remove_phi_src(block->successors[1], block);
+
+   unlink_block_successors(block);
+   if (add_normal_successors)
+      block_add_normal_succs(block);
+
+   /* If we've just removed a break, and the block we were jumping to (after
+    * the loop) now has zero predecessors, we've created a new infinite loop.
+    *
+    * NIR doesn't allow blocks (other than the start block) to have zero
+    * predecessors.  In particular, dominance assumes all blocks are reachable.
+    * So, we insert a "fake link" by making successors[1] point after the loop.
+    *
+    * Note that we have to do this after unlinking/recreating the block's
+    * successors.  If we removed a "break" at the end of the loop, then
+    * block == last_block, so block->successors[0] would already be "next",
+    * and adding a fake link would create two identical successors.  Doing
+    * this afterward works, as we'll have changed block->successors[0] to
+    * be the top of the loop.
+    */
+   if (type == nir_jump_break && next->predecessors->entries == 0) {
+      nir_loop *loop =
+         nir_cf_node_as_loop(nir_cf_node_prev(&next->cf_node));
+
+      /* insert fake link */
+      nir_cf_node *last = nir_loop_last_cf_node(loop);
+      assert(last->type == nir_cf_node_block);
+      nir_block *last_block = nir_cf_node_as_block(last);
+
+      last_block->successors[1] = next;
+      block_add_pred(next, last_block);
+   }
+}
+
+void
+nir_handle_remove_jump(nir_block *block, nir_jump_type type)
+{
+   unlink_jump(block, type, true);
+
+   nir_function_impl *impl = nir_cf_node_get_function(&block->cf_node);
+   nir_metadata_preserve(impl, nir_metadata_none);
+}
+
+static void
+update_if_uses(nir_cf_node *node)
+{
+   if (node->type != nir_cf_node_if)
+      return;
+
+   nir_if *if_stmt = nir_cf_node_as_if(node);
+
+   if_stmt->condition.parent_if = if_stmt;
+   if (if_stmt->condition.is_ssa) {
+      list_addtail(&if_stmt->condition.use_link,
+                   &if_stmt->condition.ssa->if_uses);
+   } else {
+      list_addtail(&if_stmt->condition.use_link,
+                   &if_stmt->condition.reg.reg->if_uses);
+   }
+}
+
+/**
+ * Stitch two basic blocks together into one. The aggregate must have the same
+ * predecessors as the first and the same successors as the second.
+ */
+
+static void
+stitch_blocks(nir_block *before, nir_block *after)
+{
+   /*
+    * We move after into before, so we have to deal with up to 2 successors vs.
+    * possibly a large number of predecessors.
+    *
+    * TODO: special case when before is empty and after isn't?
+    */
+
+   if (block_ends_in_jump(before)) {
+      assert(exec_list_is_empty(&after->instr_list));
+      if (after->successors[0])
+         remove_phi_src(after->successors[0], after);
+      if (after->successors[1])
+         remove_phi_src(after->successors[1], after);
+      unlink_block_successors(after);
+      exec_node_remove(&after->cf_node.node);
+   } else {
+      move_successors(after, before);
+
+      foreach_list_typed(nir_instr, instr, node, &after->instr_list) {
+         instr->block = before;
+      }
+
+      exec_list_append(&before->instr_list, &after->instr_list);
+      exec_node_remove(&after->cf_node.node);
+   }
+}
+
+void
+nir_cf_node_insert(nir_cursor cursor, nir_cf_node *node)
+{
+   nir_block *before, *after;
+
+   split_block_cursor(cursor, &before, &after);
+
+   if (node->type == nir_cf_node_block) {
+      nir_block *block = nir_cf_node_as_block(node);
+      exec_node_insert_after(&before->cf_node.node, &block->cf_node.node);
+      block->cf_node.parent = before->cf_node.parent;
+      /* stitch_blocks() assumes that any block that ends with a jump has
+       * already been setup with the correct successors, so we need to set
+       * up jumps here as the block is being inserted.
+       */
+      if (block_ends_in_jump(block))
+         nir_handle_add_jump(block);
+
+      stitch_blocks(block, after);
+      stitch_blocks(before, block);
+   } else {
+      update_if_uses(node);
+      insert_non_block(before, node, after);
+   }
+}
+
+static bool
+replace_ssa_def_uses(nir_ssa_def *def, void *void_impl)
+{
+   nir_function_impl *impl = void_impl;
+   void *mem_ctx = ralloc_parent(impl);
+
+   nir_ssa_undef_instr *undef =
+      nir_ssa_undef_instr_create(mem_ctx, def->num_components);
+   nir_instr_insert_before_cf_list(&impl->body, &undef->instr);
+   nir_ssa_def_rewrite_uses(def, nir_src_for_ssa(&undef->def));
+   return true;
+}
+
+static void
+cleanup_cf_node(nir_cf_node *node, nir_function_impl *impl)
+{
+   switch (node->type) {
+   case nir_cf_node_block: {
+      nir_block *block = nir_cf_node_as_block(node);
+      /* We need to walk the instructions and clean up defs/uses */
+      nir_foreach_instr_safe(block, instr) {
+         if (instr->type == nir_instr_type_jump) {
+            nir_jump_type jump_type = nir_instr_as_jump(instr)->type;
+            unlink_jump(block, jump_type, false);
+         } else {
+            nir_foreach_ssa_def(instr, replace_ssa_def_uses, impl);
+            nir_instr_remove(instr);
+         }
+      }
+      break;
+   }
+
+   case nir_cf_node_if: {
+      nir_if *if_stmt = nir_cf_node_as_if(node);
+      foreach_list_typed(nir_cf_node, child, node, &if_stmt->then_list)
+         cleanup_cf_node(child, impl);
+      foreach_list_typed(nir_cf_node, child, node, &if_stmt->else_list)
+         cleanup_cf_node(child, impl);
+
+      list_del(&if_stmt->condition.use_link);
+      break;
+   }
+
+   case nir_cf_node_loop: {
+      nir_loop *loop = nir_cf_node_as_loop(node);
+      foreach_list_typed(nir_cf_node, child, node, &loop->body)
+         cleanup_cf_node(child, impl);
+      break;
+   }
+   case nir_cf_node_function: {
+      nir_function_impl *impl = nir_cf_node_as_function(node);
+      foreach_list_typed(nir_cf_node, child, node, &impl->body)
+         cleanup_cf_node(child, impl);
+      break;
+   }
+   default:
+      unreachable("Invalid CF node type");
+   }
+}
+
+void
+nir_cf_extract(nir_cf_list *extracted, nir_cursor begin, nir_cursor end)
+{
+   nir_block *block_begin, *block_end, *block_before, *block_after;
+
+   if (nir_cursors_equal(begin, end)) {
+      exec_list_make_empty(&extracted->list);
+      extracted->impl = NULL; /* we shouldn't need this */
+      return;
+   }
+
+   /* In the case where begin points to an instruction in some basic block and
+    * end points to the end of the same basic block, we rely on the fact that
+    * splitting on an instruction moves earlier instructions into a new basic
+    * block. If the later instructions were moved instead, then the end cursor
+    * would be pointing to the same place that begin used to point to, which
+    * is obviously not what we want.
+    */
+   split_block_cursor(begin, &block_before, &block_begin);
+   split_block_cursor(end, &block_end, &block_after);
+
+   extracted->impl = nir_cf_node_get_function(&block_begin->cf_node);
+   exec_list_make_empty(&extracted->list);
+
+   /* Dominance and other block-related information is toast. */
+   nir_metadata_preserve(extracted->impl, nir_metadata_none);
+
+   nir_cf_node *cf_node = &block_begin->cf_node;
+   nir_cf_node *cf_node_end = &block_end->cf_node;
+   while (true) {
+      nir_cf_node *next = nir_cf_node_next(cf_node);
+
+      exec_node_remove(&cf_node->node);
+      cf_node->parent = NULL;
+      exec_list_push_tail(&extracted->list, &cf_node->node);
+
+      if (cf_node == cf_node_end)
+         break;
+
+      cf_node = next;
+   }
+
+   stitch_blocks(block_before, block_after);
+}
+
+void
+nir_cf_reinsert(nir_cf_list *cf_list, nir_cursor cursor)
+{
+   nir_block *before, *after;
+
+   if (exec_list_is_empty(&cf_list->list))
+      return;
+
+   split_block_cursor(cursor, &before, &after);
+
+   foreach_list_typed_safe(nir_cf_node, node, node, &cf_list->list) {
+      exec_node_remove(&node->node);
+      node->parent = before->cf_node.parent;
+      exec_node_insert_node_before(&after->cf_node.node, &node->node);
+   }
+
+   stitch_blocks(before,
+                 nir_cf_node_as_block(nir_cf_node_next(&before->cf_node)));
+   stitch_blocks(nir_cf_node_as_block(nir_cf_node_prev(&after->cf_node)),
+                 after);
+}
+
+void
+nir_cf_delete(nir_cf_list *cf_list)
+{
+   foreach_list_typed(nir_cf_node, node, node, &cf_list->list) {
+      cleanup_cf_node(node, cf_list->impl);
+   }
+}
diff --git a/src/compiler/nir/nir_control_flow.h b/src/compiler/nir/nir_control_flow.h
new file mode 100644
index 00000000000..b71382fc597
--- /dev/null
+++ b/src/compiler/nir/nir_control_flow.h
@@ -0,0 +1,162 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** NIR Control Flow Modification
+ *
+ * This file contains various API's that make modifying control flow in NIR,
+ * while maintaining the invariants checked by the validator, much easier.
+ * There are two parts to this:
+ *
+ * 1. Inserting control flow (if's and loops) in various places, for creating
+ *    IR either from scratch or as part of some lowering pass.
+ * 2. Taking existing pieces of the IR and either moving them around or
+ *    deleting them.
+ */
+
+/** Control flow insertion. */
+
+/** puts a control flow node where the cursor is */
+void nir_cf_node_insert(nir_cursor cursor, nir_cf_node *node);
+
+/** puts a control flow node immediately after another control flow node */
+static inline void
+nir_cf_node_insert_after(nir_cf_node *node, nir_cf_node *after)
+{
+   nir_cf_node_insert(nir_after_cf_node(node), after);
+}
+
+/** puts a control flow node immediately before another control flow node */
+static inline void
+nir_cf_node_insert_before(nir_cf_node *node, nir_cf_node *before)
+{
+   nir_cf_node_insert(nir_before_cf_node(node), before);
+}
+
+/** puts a control flow node at the beginning of a list from an if, loop, or function */
+static inline void
+nir_cf_node_insert_begin(struct exec_list *list, nir_cf_node *node)
+{
+   nir_cf_node_insert(nir_before_cf_list(list), node);
+}
+
+/** puts a control flow node at the end of a list from an if, loop, or function */
+static inline void
+nir_cf_node_insert_end(struct exec_list *list, nir_cf_node *node)
+{
+   nir_cf_node_insert(nir_after_cf_list(list), node);
+}
+
+
+/** Control flow motion.
+ *
+ * These functions let you take a part of a control flow list (basically
+ * equivalent to a series of statement in GLSL) and "extract" it from the IR,
+ * so that it's a free-floating piece of IR that can be either re-inserted
+ * somewhere else or deleted entirely. A few notes on using it:
+ *
+ * 1. Phi nodes are considered attached to the piece of control flow that
+ *    their sources come from. There are three places where phi nodes can
+ *    occur, which are the three places where a block can have multiple
+ *    predecessors:
+ *
+ *    1) After an if statement, if neither branch ends in a jump.
+ *    2) After a loop, if there are multiple break's.
+ *    3) At the beginning of a loop.
+ *
+ *    For #1, the phi node is considered to be part of the if, and for #2 and
+ *    #3 the phi node is considered to be part of the loop. This allows us to
+ *    keep phi's intact, but it means that phi nodes cannot be separated from
+ *    the control flow they come from. For example, extracting an if without
+ *    extracting all the phi nodes after it is not allowed, and neither is
+ *    extracting only some of the phi nodes at the beginning of a block. It
+ *    also means that extracting from the beginning of a basic block actually
+ *    means extracting from the first non-phi instruction, since there's no
+ *    situation where extracting phi nodes without extracting what comes
+ *    before them makes any sense.
+ *
+ * 2. Phi node sources are guaranteed to remain valid, meaning that they still
+ *    correspond one-to-one with the predecessors of the basic block they're
+ *    part of. In addition, the original sources will be preserved unless they
+ *    correspond to a break or continue that was deleted. However, no attempt
+ *    is made to ensure that SSA form is maintained. In particular, it is
+ *    *not* guaranteed that definitions of SSA values will dominate all their
+ *    uses after all is said and done. Either the caller must ensure that this
+ *    is the case, or it must insert extra phi nodes to restore SSA.
+ *
+ * 3. It is invalid to move a piece of IR with a break/continue outside of the
+ *    loop it references. Doing this will result in invalid
+ *    successors/predecessors and phi node sources.
+ *
+ * 4. It is invalid to move a piece of IR from one function implementation to
+ *    another.
+ *
+ * 5. Extracting a control flow list will leave lots of dangling references to
+ *    and from other pieces of the IR. It also leaves things in a not 100%
+ *    consistent state. This means that some things (e.g. inserting
+ *    instructions) might not work reliably on the extracted control flow. It
+ *    also means that extracting control flow without re-inserting it or
+ *    deleting it is a Bad Thing (tm).
+ */
+
+typedef struct {
+   struct exec_list list;
+   nir_function_impl *impl; /* for cleaning up if the list is deleted */
+} nir_cf_list;
+
+void nir_cf_extract(nir_cf_list *extracted, nir_cursor begin, nir_cursor end);
+
+void nir_cf_reinsert(nir_cf_list *cf_list, nir_cursor cursor);
+
+void nir_cf_delete(nir_cf_list *cf_list);
+
+static inline void
+nir_cf_list_extract(nir_cf_list *extracted, struct exec_list *cf_list)
+{
+   nir_cf_extract(extracted, nir_before_cf_list(cf_list),
+                  nir_after_cf_list(cf_list));
+}
+
+/** removes a control flow node, doing any cleanup necessary */
+static inline void
+nir_cf_node_remove(nir_cf_node *node)
+{
+   nir_cf_list list;
+   nir_cf_extract(&list, nir_before_cf_node(node), nir_after_cf_node(node));
+   nir_cf_delete(&list);
+}
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/compiler/nir/nir_control_flow_private.h b/src/compiler/nir/nir_control_flow_private.h
new file mode 100644
index 00000000000..f32b57a8cef
--- /dev/null
+++ b/src/compiler/nir/nir_control_flow_private.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir_control_flow.h"
+
+#pragma once
+
+/* Internal control-flow modification functions used when inserting/removing
+ * instructions.
+ */
+
+void nir_handle_add_jump(nir_block *block);
+void nir_handle_remove_jump(nir_block *block, nir_jump_type type);
diff --git a/src/compiler/nir/nir_dominance.c b/src/compiler/nir/nir_dominance.c
new file mode 100644
index 00000000000..d95f3968074
--- /dev/null
+++ b/src/compiler/nir/nir_dominance.c
@@ -0,0 +1,354 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+
+/*
+ * Implements the algorithms for computing the dominance tree and the
+ * dominance frontier from "A Simple, Fast Dominance Algorithm" by Cooper,
+ * Harvey, and Kennedy.
+ */
+
+typedef struct {
+   nir_function_impl *impl;
+   bool progress;
+} dom_state;
+
+static bool
+init_block_cb(nir_block *block, void *_state)
+{
+   dom_state *state = (dom_state *) _state;
+   if (block == nir_start_block(state->impl))
+      block->imm_dom = block;
+   else
+      block->imm_dom = NULL;
+   block->num_dom_children = 0;
+
+   struct set_entry *entry;
+   set_foreach(block->dom_frontier, entry) {
+      _mesa_set_remove(block->dom_frontier, entry);
+   }
+
+   return true;
+}
+
+static nir_block *
+intersect(nir_block *b1, nir_block *b2)
+{
+   while (b1 != b2) {
+      /*
+       * Note, the comparisons here are the opposite of what the paper says
+       * because we index blocks from beginning -> end (i.e. reverse
+       * post-order) instead of post-order like they assume.
+       */
+      while (b1->index > b2->index)
+         b1 = b1->imm_dom;
+      while (b2->index > b1->index)
+         b2 = b2->imm_dom;
+   }
+
+   return b1;
+}
+
+static bool
+calc_dominance_cb(nir_block *block, void *_state)
+{
+   dom_state *state = (dom_state *) _state;
+   if (block == nir_start_block(state->impl))
+      return true;
+
+   nir_block *new_idom = NULL;
+   struct set_entry *entry;
+   set_foreach(block->predecessors, entry) {
+      nir_block *pred = (nir_block *) entry->key;
+
+      if (pred->imm_dom) {
+         if (new_idom)
+            new_idom = intersect(pred, new_idom);
+         else
+            new_idom = pred;
+      }
+   }
+
+   if (block->imm_dom != new_idom) {
+      block->imm_dom = new_idom;
+      state->progress = true;
+   }
+
+   return true;
+}
+
+static bool
+calc_dom_frontier_cb(nir_block *block, void *state)
+{
+   (void) state;
+
+   if (block->predecessors->entries > 1) {
+      struct set_entry *entry;
+      set_foreach(block->predecessors, entry) {
+         nir_block *runner = (nir_block *) entry->key;
+
+         /* Skip unreachable predecessors */
+         if (runner->imm_dom == NULL)
+            continue;
+
+         while (runner != block->imm_dom) {
+            _mesa_set_add(runner->dom_frontier, block);
+            runner = runner->imm_dom;
+         }
+      }
+   }
+
+   return true;
+}
+
+/*
+ * Compute each node's children in the dominance tree from the immediate
+ * dominator information. We do this in three stages:
+ *
+ * 1. Calculate the number of children each node has
+ * 2. Allocate arrays, setting the number of children to 0 again
+ * 3. For each node, add itself to its parent's list of children, using
+ *    num_dom_children as an index - at the end of this step, num_dom_children
+ *    for each node will be the same as it was at the end of step #1.
+ */
+
+static bool
+block_count_children(nir_block *block, void *state)
+{
+   (void) state;
+
+   if (block->imm_dom)
+      block->imm_dom->num_dom_children++;
+
+   return true;
+}
+
+static bool
+block_alloc_children(nir_block *block, void *state)
+{
+   void *mem_ctx = state;
+
+   block->dom_children = ralloc_array(mem_ctx, nir_block *,
+                                      block->num_dom_children);
+   block->num_dom_children = 0;
+
+   return true;
+}
+
+static bool
+block_add_child(nir_block *block, void *state)
+{
+   (void) state;
+
+   if (block->imm_dom)
+      block->imm_dom->dom_children[block->imm_dom->num_dom_children++] = block;
+
+   return true;
+}
+
+static void
+calc_dom_children(nir_function_impl* impl)
+{
+   void *mem_ctx = ralloc_parent(impl);
+
+   nir_foreach_block(impl, block_count_children, NULL);
+   nir_foreach_block(impl, block_alloc_children, mem_ctx);
+   nir_foreach_block(impl, block_add_child, NULL);
+}
+
+static void
+calc_dfs_indicies(nir_block *block, unsigned *index)
+{
+   block->dom_pre_index = (*index)++;
+
+   for (unsigned i = 0; i < block->num_dom_children; i++)
+      calc_dfs_indicies(block->dom_children[i], index);
+
+   block->dom_post_index = (*index)++;
+}
+
+void
+nir_calc_dominance_impl(nir_function_impl *impl)
+{
+   if (impl->valid_metadata & nir_metadata_dominance)
+      return;
+
+   nir_metadata_require(impl, nir_metadata_block_index);
+
+   dom_state state;
+   state.impl = impl;
+   state.progress = true;
+
+   nir_foreach_block(impl, init_block_cb, &state);
+
+   while (state.progress) {
+      state.progress = false;
+      nir_foreach_block(impl, calc_dominance_cb, &state);
+   }
+
+   nir_foreach_block(impl, calc_dom_frontier_cb, &state);
+
+   nir_block *start_block = nir_start_block(impl);
+   start_block->imm_dom = NULL;
+
+   calc_dom_children(impl);
+
+   unsigned dfs_index = 0;
+   calc_dfs_indicies(start_block, &dfs_index);
+}
+
+void
+nir_calc_dominance(nir_shader *shader)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         nir_calc_dominance_impl(function->impl);
+   }
+}
+
+/**
+ * Computes the least common anscestor of two blocks.  If one of the blocks
+ * is null, the other block is returned.
+ */
+nir_block *
+nir_dominance_lca(nir_block *b1, nir_block *b2)
+{
+   if (b1 == NULL)
+      return b2;
+
+   if (b2 == NULL)
+      return b1;
+
+   assert(nir_cf_node_get_function(&b1->cf_node) ==
+          nir_cf_node_get_function(&b2->cf_node));
+
+   assert(nir_cf_node_get_function(&b1->cf_node)->valid_metadata &
+          nir_metadata_dominance);
+
+   return intersect(b1, b2);
+}
+
+/**
+ * Returns true if parent dominates child
+ */
+bool
+nir_block_dominates(nir_block *parent, nir_block *child)
+{
+   assert(nir_cf_node_get_function(&parent->cf_node) ==
+          nir_cf_node_get_function(&child->cf_node));
+
+   assert(nir_cf_node_get_function(&parent->cf_node)->valid_metadata &
+          nir_metadata_dominance);
+
+   return child->dom_pre_index >= parent->dom_pre_index &&
+          child->dom_post_index <= parent->dom_post_index;
+}
+
+static bool
+dump_block_dom(nir_block *block, void *state)
+{
+   FILE *fp = state;
+   if (block->imm_dom)
+      fprintf(fp, "\t%u -> %u\n", block->imm_dom->index, block->index);
+   return true;
+}
+
+void
+nir_dump_dom_tree_impl(nir_function_impl *impl, FILE *fp)
+{
+   fprintf(fp, "digraph doms_%s {\n", impl->function->name);
+   nir_foreach_block(impl, dump_block_dom, fp);
+   fprintf(fp, "}\n\n");
+}
+
+void
+nir_dump_dom_tree(nir_shader *shader, FILE *fp)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         nir_dump_dom_tree_impl(function->impl, fp);
+   }
+}
+
+static bool
+dump_block_dom_frontier(nir_block *block, void *state)
+{
+   FILE *fp = state;
+
+   fprintf(fp, "DF(%u) = {", block->index);
+   struct set_entry *entry;
+   set_foreach(block->dom_frontier, entry) {
+      nir_block *df = (nir_block *) entry->key;
+      fprintf(fp, "%u, ", df->index);
+   }
+   fprintf(fp, "}\n");
+   return true;
+}
+
+void
+nir_dump_dom_frontier_impl(nir_function_impl *impl, FILE *fp)
+{
+   nir_foreach_block(impl, dump_block_dom_frontier, fp);
+}
+
+void
+nir_dump_dom_frontier(nir_shader *shader, FILE *fp)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         nir_dump_dom_frontier_impl(function->impl, fp);
+   }
+}
+
+static bool
+dump_block_succs(nir_block *block, void *state)
+{
+   FILE *fp = state;
+   if (block->successors[0])
+      fprintf(fp, "\t%u -> %u\n", block->index, block->successors[0]->index);
+   if (block->successors[1])
+      fprintf(fp, "\t%u -> %u\n", block->index, block->successors[1]->index);
+   return true;
+}
+
+void
+nir_dump_cfg_impl(nir_function_impl *impl, FILE *fp)
+{
+   fprintf(fp, "digraph cfg_%s {\n", impl->function->name);
+   nir_foreach_block(impl, dump_block_succs, fp);
+   fprintf(fp, "}\n\n");
+}
+
+void
+nir_dump_cfg(nir_shader *shader, FILE *fp)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         nir_dump_cfg_impl(function->impl, fp);
+   }
+}
diff --git a/src/compiler/nir/nir_from_ssa.c b/src/compiler/nir/nir_from_ssa.c
new file mode 100644
index 00000000000..8bc9f24e406
--- /dev/null
+++ b/src/compiler/nir/nir_from_ssa.c
@@ -0,0 +1,805 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir.h"
+#include "nir_vla.h"
+
+/*
+ * This file implements an out-of-SSA pass as described in "Revisiting
+ * Out-of-SSA Translation for Correctness, Code Quality, and Efficiency" by
+ * Boissinot et. al.
+ */
+
+struct from_ssa_state {
+   void *mem_ctx;
+   void *dead_ctx;
+   bool phi_webs_only;
+   struct hash_table *merge_node_table;
+   nir_instr *instr;
+   nir_function_impl *impl;
+};
+
+/* Returns true if a dominates b */
+static bool
+ssa_def_dominates(nir_ssa_def *a, nir_ssa_def *b)
+{
+   if (a->live_index == 0) {
+      /* SSA undefs always dominate */
+      return true;
+   } else if (b->live_index < a->live_index) {
+      return false;
+   } else if (a->parent_instr->block == b->parent_instr->block) {
+      return a->live_index <= b->live_index;
+   } else {
+      return nir_block_dominates(a->parent_instr->block,
+                                 b->parent_instr->block);
+   }
+}
+
+
+/* The following data structure, which I have named merge_set is a way of
+ * representing a set registers of non-interfering registers.  This is
+ * based on the concept of a "dominence forest" presented in "Fast Copy
+ * Coalescing and Live-Range Identification" by Budimlic et. al. but the
+ * implementation concept is taken from  "Revisiting Out-of-SSA Translation
+ * for Correctness, Code Quality, and Efficiency" by Boissinot et. al..
+ *
+ * Each SSA definition is associated with a merge_node and the association
+ * is represented by a combination of a hash table and the "def" parameter
+ * in the merge_node structure.  The merge_set stores a linked list of
+ * merge_node's in dominence order of the ssa definitions.  (Since the
+ * liveness analysis pass indexes the SSA values in dominence order for us,
+ * this is an easy thing to keep up.)  It is assumed that no pair of the
+ * nodes in a given set interfere.  Merging two sets or checking for
+ * interference can be done in a single linear-time merge-sort walk of the
+ * two lists of nodes.
+ */
+struct merge_set;
+
+typedef struct {
+   struct exec_node node;
+   struct merge_set *set;
+   nir_ssa_def *def;
+} merge_node;
+
+typedef struct merge_set {
+   struct exec_list nodes;
+   unsigned size;
+   nir_register *reg;
+} merge_set;
+
+#if 0
+static void
+merge_set_dump(merge_set *set, FILE *fp)
+{
+   nir_ssa_def *dom[set->size];
+   int dom_idx = -1;
+
+   foreach_list_typed(merge_node, node, node, &set->nodes) {
+      while (dom_idx >= 0 && !ssa_def_dominates(dom[dom_idx], node->def))
+         dom_idx--;
+
+      for (int i = 0; i <= dom_idx; i++)
+         fprintf(fp, "  ");
+
+      if (node->def->name)
+         fprintf(fp, "ssa_%d /* %s */\n", node->def->index, node->def->name);
+      else
+         fprintf(fp, "ssa_%d\n", node->def->index);
+
+      dom[++dom_idx] = node->def;
+   }
+}
+#endif
+
+static merge_node *
+get_merge_node(nir_ssa_def *def, struct from_ssa_state *state)
+{
+   struct hash_entry *entry =
+      _mesa_hash_table_search(state->merge_node_table, def);
+   if (entry)
+      return entry->data;
+
+   merge_set *set = ralloc(state->dead_ctx, merge_set);
+   exec_list_make_empty(&set->nodes);
+   set->size = 1;
+   set->reg = NULL;
+
+   merge_node *node = ralloc(state->dead_ctx, merge_node);
+   node->set = set;
+   node->def = def;
+   exec_list_push_head(&set->nodes, &node->node);
+
+   _mesa_hash_table_insert(state->merge_node_table, def, node);
+
+   return node;
+}
+
+static bool
+merge_nodes_interfere(merge_node *a, merge_node *b)
+{
+   return nir_ssa_defs_interfere(a->def, b->def);
+}
+
+/* Merges b into a */
+static merge_set *
+merge_merge_sets(merge_set *a, merge_set *b)
+{
+   struct exec_node *an = exec_list_get_head(&a->nodes);
+   struct exec_node *bn = exec_list_get_head(&b->nodes);
+   while (!exec_node_is_tail_sentinel(bn)) {
+      merge_node *a_node = exec_node_data(merge_node, an, node);
+      merge_node *b_node = exec_node_data(merge_node, bn, node);
+
+      if (exec_node_is_tail_sentinel(an) ||
+          a_node->def->live_index > b_node->def->live_index) {
+         struct exec_node *next = bn->next;
+         exec_node_remove(bn);
+         exec_node_insert_node_before(an, bn);
+         exec_node_data(merge_node, bn, node)->set = a;
+         bn = next;
+      } else {
+         an = an->next;
+      }
+   }
+
+   a->size += b->size;
+   b->size = 0;
+
+   return a;
+}
+
+/* Checks for any interference between two merge sets
+ *
+ * This is an implementation of Algorithm 2 in "Revisiting Out-of-SSA
+ * Translation for Correctness, Code Quality, and Efficiency" by
+ * Boissinot et. al.
+ */
+static bool
+merge_sets_interfere(merge_set *a, merge_set *b)
+{
+   NIR_VLA(merge_node *, dom, a->size + b->size);
+   int dom_idx = -1;
+
+   struct exec_node *an = exec_list_get_head(&a->nodes);
+   struct exec_node *bn = exec_list_get_head(&b->nodes);
+   while (!exec_node_is_tail_sentinel(an) ||
+          !exec_node_is_tail_sentinel(bn)) {
+
+      merge_node *current;
+      if (exec_node_is_tail_sentinel(an)) {
+         current = exec_node_data(merge_node, bn, node);
+         bn = bn->next;
+      } else if (exec_node_is_tail_sentinel(bn)) {
+         current = exec_node_data(merge_node, an, node);
+         an = an->next;
+      } else {
+         merge_node *a_node = exec_node_data(merge_node, an, node);
+         merge_node *b_node = exec_node_data(merge_node, bn, node);
+
+         if (a_node->def->live_index <= b_node->def->live_index) {
+            current = a_node;
+            an = an->next;
+         } else {
+            current = b_node;
+            bn = bn->next;
+         }
+      }
+
+      while (dom_idx >= 0 &&
+             !ssa_def_dominates(dom[dom_idx]->def, current->def))
+         dom_idx--;
+
+      if (dom_idx >= 0 && merge_nodes_interfere(current, dom[dom_idx]))
+         return true;
+
+      dom[++dom_idx] = current;
+   }
+
+   return false;
+}
+
+static bool
+add_parallel_copy_to_end_of_block(nir_block *block, void *void_state)
+{
+   struct from_ssa_state *state = void_state;
+
+   bool need_end_copy = false;
+   if (block->successors[0]) {
+      nir_instr *instr = nir_block_first_instr(block->successors[0]);
+      if (instr && instr->type == nir_instr_type_phi)
+         need_end_copy = true;
+   }
+
+   if (block->successors[1]) {
+      nir_instr *instr = nir_block_first_instr(block->successors[1]);
+      if (instr && instr->type == nir_instr_type_phi)
+         need_end_copy = true;
+   }
+
+   if (need_end_copy) {
+      /* If one of our successors has at least one phi node, we need to
+       * create a parallel copy at the end of the block but before the jump
+       * (if there is one).
+       */
+      nir_parallel_copy_instr *pcopy =
+         nir_parallel_copy_instr_create(state->dead_ctx);
+
+      nir_instr_insert(nir_after_block_before_jump(block), &pcopy->instr);
+   }
+
+   return true;
+}
+
+static nir_parallel_copy_instr *
+get_parallel_copy_at_end_of_block(nir_block *block)
+{
+   nir_instr *last_instr = nir_block_last_instr(block);
+   if (last_instr == NULL)
+      return NULL;
+
+   /* The last instruction may be a jump in which case the parallel copy is
+    * right before it.
+    */
+   if (last_instr->type == nir_instr_type_jump)
+      last_instr = nir_instr_prev(last_instr);
+
+   if (last_instr && last_instr->type == nir_instr_type_parallel_copy)
+      return nir_instr_as_parallel_copy(last_instr);
+   else
+      return NULL;
+}
+
+/** Isolate phi nodes with parallel copies
+ *
+ * In order to solve the dependency problems with the sources and
+ * destinations of phi nodes, we first isolate them by adding parallel
+ * copies to the beginnings and ends of basic blocks.  For every block with
+ * phi nodes, we add a parallel copy immediately following the last phi
+ * node that copies the destinations of all of the phi nodes to new SSA
+ * values.  We also add a parallel copy to the end of every block that has
+ * a successor with phi nodes that, for each phi node in each successor,
+ * copies the corresponding sorce of the phi node and adjust the phi to
+ * used the destination of the parallel copy.
+ *
+ * In SSA form, each value has exactly one definition.  What this does is
+ * ensure that each value used in a phi also has exactly one use.  The
+ * destinations of phis are only used by the parallel copy immediately
+ * following the phi nodes and.  Thanks to the parallel copy at the end of
+ * the predecessor block, the sources of phi nodes are are the only use of
+ * that value.  This allows us to immediately assign all the sources and
+ * destinations of any given phi node to the same register without worrying
+ * about interference at all.  We do coalescing to get rid of the parallel
+ * copies where possible.
+ *
+ * Before this pass can be run, we have to iterate over the blocks with
+ * add_parallel_copy_to_end_of_block to ensure that the parallel copies at
+ * the ends of blocks exist.  We can create the ones at the beginnings as
+ * we go, but the ones at the ends of blocks need to be created ahead of
+ * time because of potential back-edges in the CFG.
+ */
+static bool
+isolate_phi_nodes_block(nir_block *block, void *void_state)
+{
+   struct from_ssa_state *state = void_state;
+
+   nir_instr *last_phi_instr = NULL;
+   nir_foreach_instr(block, instr) {
+      /* Phi nodes only ever come at the start of a block */
+      if (instr->type != nir_instr_type_phi)
+         break;
+
+      last_phi_instr = instr;
+   }
+
+   /* If we don't have any phi's, then there's nothing for us to do. */
+   if (last_phi_instr == NULL)
+      return true;
+
+   /* If we have phi nodes, we need to create a parallel copy at the
+    * start of this block but after the phi nodes.
+    */
+   nir_parallel_copy_instr *block_pcopy =
+      nir_parallel_copy_instr_create(state->dead_ctx);
+   nir_instr_insert_after(last_phi_instr, &block_pcopy->instr);
+
+   nir_foreach_instr(block, instr) {
+      /* Phi nodes only ever come at the start of a block */
+      if (instr->type != nir_instr_type_phi)
+         break;
+
+      nir_phi_instr *phi = nir_instr_as_phi(instr);
+      assert(phi->dest.is_ssa);
+      nir_foreach_phi_src(phi, src) {
+         nir_parallel_copy_instr *pcopy =
+            get_parallel_copy_at_end_of_block(src->pred);
+         assert(pcopy);
+
+         nir_parallel_copy_entry *entry = rzalloc(state->dead_ctx,
+                                                  nir_parallel_copy_entry);
+         nir_ssa_dest_init(&pcopy->instr, &entry->dest,
+                           phi->dest.ssa.num_components, src->src.ssa->name);
+         exec_list_push_tail(&pcopy->entries, &entry->node);
+
+         assert(src->src.is_ssa);
+         nir_instr_rewrite_src(&pcopy->instr, &entry->src, src->src);
+
+         nir_instr_rewrite_src(&phi->instr, &src->src,
+                               nir_src_for_ssa(&entry->dest.ssa));
+      }
+
+      nir_parallel_copy_entry *entry = rzalloc(state->dead_ctx,
+                                               nir_parallel_copy_entry);
+      nir_ssa_dest_init(&block_pcopy->instr, &entry->dest,
+                        phi->dest.ssa.num_components, phi->dest.ssa.name);
+      exec_list_push_tail(&block_pcopy->entries, &entry->node);
+
+      nir_ssa_def_rewrite_uses(&phi->dest.ssa,
+                               nir_src_for_ssa(&entry->dest.ssa));
+
+      nir_instr_rewrite_src(&block_pcopy->instr, &entry->src,
+                            nir_src_for_ssa(&phi->dest.ssa));
+   }
+
+   return true;
+}
+
+static bool
+coalesce_phi_nodes_block(nir_block *block, void *void_state)
+{
+   struct from_ssa_state *state = void_state;
+
+   nir_foreach_instr(block, instr) {
+      /* Phi nodes only ever come at the start of a block */
+      if (instr->type != nir_instr_type_phi)
+         break;
+
+      nir_phi_instr *phi = nir_instr_as_phi(instr);
+
+      assert(phi->dest.is_ssa);
+      merge_node *dest_node = get_merge_node(&phi->dest.ssa, state);
+
+      nir_foreach_phi_src(phi, src) {
+         assert(src->src.is_ssa);
+         merge_node *src_node = get_merge_node(src->src.ssa, state);
+         if (src_node->set != dest_node->set)
+            merge_merge_sets(dest_node->set, src_node->set);
+      }
+   }
+
+   return true;
+}
+
+static void
+aggressive_coalesce_parallel_copy(nir_parallel_copy_instr *pcopy,
+                                 struct from_ssa_state *state)
+{
+   nir_foreach_parallel_copy_entry(pcopy, entry) {
+      if (!entry->src.is_ssa)
+         continue;
+
+      /* Since load_const instructions are SSA only, we can't replace their
+       * destinations with registers and, therefore, can't coalesce them.
+       */
+      if (entry->src.ssa->parent_instr->type == nir_instr_type_load_const)
+         continue;
+
+      /* Don't try and coalesce these */
+      if (entry->dest.ssa.num_components != entry->src.ssa->num_components)
+         continue;
+
+      merge_node *src_node = get_merge_node(entry->src.ssa, state);
+      merge_node *dest_node = get_merge_node(&entry->dest.ssa, state);
+
+      if (src_node->set == dest_node->set)
+         continue;
+
+      if (!merge_sets_interfere(src_node->set, dest_node->set))
+         merge_merge_sets(src_node->set, dest_node->set);
+   }
+}
+
+static bool
+aggressive_coalesce_block(nir_block *block, void *void_state)
+{
+   struct from_ssa_state *state = void_state;
+
+   nir_parallel_copy_instr *start_pcopy = NULL;
+   nir_foreach_instr(block, instr) {
+      /* Phi nodes only ever come at the start of a block */
+      if (instr->type != nir_instr_type_phi) {
+         if (instr->type != nir_instr_type_parallel_copy)
+            break; /* The parallel copy must be right after the phis */
+
+         start_pcopy = nir_instr_as_parallel_copy(instr);
+
+         aggressive_coalesce_parallel_copy(start_pcopy, state);
+
+         break;
+      }
+   }
+
+   nir_parallel_copy_instr *end_pcopy =
+      get_parallel_copy_at_end_of_block(block);
+
+   if (end_pcopy && end_pcopy != start_pcopy)
+      aggressive_coalesce_parallel_copy(end_pcopy, state);
+
+   return true;
+}
+
+static bool
+rewrite_ssa_def(nir_ssa_def *def, void *void_state)
+{
+   struct from_ssa_state *state = void_state;
+   nir_register *reg;
+
+   struct hash_entry *entry =
+      _mesa_hash_table_search(state->merge_node_table, def);
+   if (entry) {
+      /* In this case, we're part of a phi web.  Use the web's register. */
+      merge_node *node = (merge_node *)entry->data;
+
+      /* If it doesn't have a register yet, create one.  Note that all of
+       * the things in the merge set should be the same so it doesn't
+       * matter which node's definition we use.
+       */
+      if (node->set->reg == NULL) {
+         node->set->reg = nir_local_reg_create(state->impl);
+         node->set->reg->name = def->name;
+         node->set->reg->num_components = def->num_components;
+         node->set->reg->num_array_elems = 0;
+      }
+
+      reg = node->set->reg;
+   } else {
+      if (state->phi_webs_only)
+         return true;
+
+      /* We leave load_const SSA values alone.  They act as immediates to
+       * the backend.  If it got coalesced into a phi, that's ok.
+       */
+      if (def->parent_instr->type == nir_instr_type_load_const)
+         return true;
+
+      reg = nir_local_reg_create(state->impl);
+      reg->name = def->name;
+      reg->num_components = def->num_components;
+      reg->num_array_elems = 0;
+   }
+
+   nir_ssa_def_rewrite_uses(def, nir_src_for_reg(reg));
+   assert(list_empty(&def->uses) && list_empty(&def->if_uses));
+
+   if (def->parent_instr->type == nir_instr_type_ssa_undef) {
+      /* If it's an ssa_undef instruction, remove it since we know we just got
+       * rid of all its uses.
+       */
+      nir_instr *parent_instr = def->parent_instr;
+      nir_instr_remove(parent_instr);
+      ralloc_steal(state->dead_ctx, parent_instr);
+      return true;
+   }
+
+   assert(def->parent_instr->type != nir_instr_type_load_const);
+
+   /* At this point we know a priori that this SSA def is part of a
+    * nir_dest.  We can use exec_node_data to get the dest pointer.
+    */
+   nir_dest *dest = exec_node_data(nir_dest, def, ssa);
+
+   nir_instr_rewrite_dest(state->instr, dest, nir_dest_for_reg(reg));
+
+   return true;
+}
+
+/* Resolves ssa definitions to registers.  While we're at it, we also
+ * remove phi nodes.
+ */
+static bool
+resolve_registers_block(nir_block *block, void *void_state)
+{
+   struct from_ssa_state *state = void_state;
+
+   nir_foreach_instr_safe(block, instr) {
+      state->instr = instr;
+      nir_foreach_ssa_def(instr, rewrite_ssa_def, state);
+
+      if (instr->type == nir_instr_type_phi) {
+         nir_instr_remove(instr);
+         ralloc_steal(state->dead_ctx, instr);
+      }
+   }
+   state->instr = NULL;
+
+   return true;
+}
+
+static void
+emit_copy(nir_parallel_copy_instr *pcopy, nir_src src, nir_src dest_src,
+          void *mem_ctx)
+{
+   assert(!dest_src.is_ssa &&
+          dest_src.reg.indirect == NULL &&
+          dest_src.reg.base_offset == 0);
+
+   if (src.is_ssa)
+      assert(src.ssa->num_components >= dest_src.reg.reg->num_components);
+   else
+      assert(src.reg.reg->num_components >= dest_src.reg.reg->num_components);
+
+   nir_alu_instr *mov = nir_alu_instr_create(mem_ctx, nir_op_imov);
+   nir_src_copy(&mov->src[0].src, &src, mov);
+   mov->dest.dest = nir_dest_for_reg(dest_src.reg.reg);
+   mov->dest.write_mask = (1 << dest_src.reg.reg->num_components) - 1;
+
+   nir_instr_insert_before(&pcopy->instr, &mov->instr);
+}
+
+/* Resolves a single parallel copy operation into a sequence of mov's
+ *
+ * This is based on Algorithm 1 from "Revisiting Out-of-SSA Translation for
+ * Correctness, Code Quality, and Efficiency" by Boissinot et. al..
+ * However, I never got the algorithm to work as written, so this version
+ * is slightly modified.
+ *
+ * The algorithm works by playing this little shell game with the values.
+ * We start by recording where every source value is and which source value
+ * each destination value should receive.  We then grab any copy whose
+ * destination is "empty", i.e. not used as a source, and do the following:
+ *  - Find where its source value currently lives
+ *  - Emit the move instruction
+ *  - Set the location of the source value to the destination
+ *  - Mark the location containing the source value
+ *  - Mark the destination as no longer needing to be copied
+ *
+ * When we run out of "empty" destinations, we have a cycle and so we
+ * create a temporary register, copy to that register, and mark the value
+ * we copied as living in that temporary.  Now, the cycle is broken, so we
+ * can continue with the above steps.
+ */
+static void
+resolve_parallel_copy(nir_parallel_copy_instr *pcopy,
+                      struct from_ssa_state *state)
+{
+   unsigned num_copies = 0;
+   nir_foreach_parallel_copy_entry(pcopy, entry) {
+      /* Sources may be SSA */
+      if (!entry->src.is_ssa && entry->src.reg.reg == entry->dest.reg.reg)
+         continue;
+
+      num_copies++;
+   }
+
+   if (num_copies == 0) {
+      /* Hooray, we don't need any copies! */
+      nir_instr_remove(&pcopy->instr);
+      return;
+   }
+
+   /* The register/source corresponding to the given index */
+   NIR_VLA_ZERO(nir_src, values, num_copies * 2);
+
+   /* The current location of a given piece of data.  We will use -1 for "null" */
+   NIR_VLA_FILL(int, loc, num_copies * 2, -1);
+
+   /* The piece of data that the given piece of data is to be copied from.  We will use -1 for "null" */
+   NIR_VLA_FILL(int, pred, num_copies * 2, -1);
+
+   /* The destinations we have yet to properly fill */
+   NIR_VLA(int, to_do, num_copies * 2);
+   int to_do_idx = -1;
+
+   /* Now we set everything up:
+    *  - All values get assigned a temporary index
+    *  - Current locations are set from sources
+    *  - Predicessors are recorded from sources and destinations
+    */
+   int num_vals = 0;
+   nir_foreach_parallel_copy_entry(pcopy, entry) {
+      /* Sources may be SSA */
+      if (!entry->src.is_ssa && entry->src.reg.reg == entry->dest.reg.reg)
+         continue;
+
+      int src_idx = -1;
+      for (int i = 0; i < num_vals; ++i) {
+         if (nir_srcs_equal(values[i], entry->src))
+            src_idx = i;
+      }
+      if (src_idx < 0) {
+         src_idx = num_vals++;
+         values[src_idx] = entry->src;
+      }
+
+      nir_src dest_src = nir_src_for_reg(entry->dest.reg.reg);
+
+      int dest_idx = -1;
+      for (int i = 0; i < num_vals; ++i) {
+         if (nir_srcs_equal(values[i], dest_src)) {
+            /* Each destination of a parallel copy instruction should be
+             * unique.  A destination may get used as a source, so we still
+             * have to walk the list.  However, the predecessor should not,
+             * at this point, be set yet, so we should have -1 here.
+             */
+            assert(pred[i] == -1);
+            dest_idx = i;
+         }
+      }
+      if (dest_idx < 0) {
+         dest_idx = num_vals++;
+         values[dest_idx] = dest_src;
+      }
+
+      loc[src_idx] = src_idx;
+      pred[dest_idx] = src_idx;
+
+      to_do[++to_do_idx] = dest_idx;
+   }
+
+   /* Currently empty destinations we can go ahead and fill */
+   NIR_VLA(int, ready, num_copies * 2);
+   int ready_idx = -1;
+
+   /* Mark the ones that are ready for copying.  We know an index is a
+    * destination if it has a predecessor and it's ready for copying if
+    * it's not marked as containing data.
+    */
+   for (int i = 0; i < num_vals; i++) {
+      if (pred[i] != -1 && loc[i] == -1)
+         ready[++ready_idx] = i;
+   }
+
+   while (to_do_idx >= 0) {
+      while (ready_idx >= 0) {
+         int b = ready[ready_idx--];
+         int a = pred[b];
+         emit_copy(pcopy, values[loc[a]], values[b], state->mem_ctx);
+
+         /* If any other copies want a they can find it at b */
+         loc[a] = b;
+
+         /* b has been filled, mark it as not needing to be copied */
+         pred[b] = -1;
+
+         /* If a needs to be filled, it's ready for copying now */
+         if (pred[a] != -1)
+            ready[++ready_idx] = a;
+      }
+      int b = to_do[to_do_idx--];
+      if (pred[b] == -1)
+         continue;
+
+      /* If we got here, then we don't have any more trivial copies that we
+       * can do.  We have to break a cycle, so we create a new temporary
+       * register for that purpose.  Normally, if going out of SSA after
+       * register allocation, you would want to avoid creating temporary
+       * registers.  However, we are going out of SSA before register
+       * allocation, so we would rather not create extra register
+       * dependencies for the backend to deal with.  If it wants, the
+       * backend can coalesce the (possibly multiple) temporaries.
+       */
+      assert(num_vals < num_copies * 2);
+      nir_register *reg = nir_local_reg_create(state->impl);
+      reg->name = "copy_temp";
+      reg->num_array_elems = 0;
+      if (values[b].is_ssa)
+         reg->num_components = values[b].ssa->num_components;
+      else
+         reg->num_components = values[b].reg.reg->num_components;
+      values[num_vals].is_ssa = false;
+      values[num_vals].reg.reg = reg;
+
+      emit_copy(pcopy, values[b], values[num_vals], state->mem_ctx);
+      loc[b] = num_vals;
+      ready[++ready_idx] = b;
+      num_vals++;
+   }
+
+   nir_instr_remove(&pcopy->instr);
+}
+
+/* Resolves the parallel copies in a block.  Each block can have at most
+ * two:  One at the beginning, right after all the phi noces, and one at
+ * the end (or right before the final jump if it exists).
+ */
+static bool
+resolve_parallel_copies_block(nir_block *block, void *void_state)
+{
+   struct from_ssa_state *state = void_state;
+
+   /* At this point, we have removed all of the phi nodes.  If a parallel
+    * copy existed right after the phi nodes in this block, it is now the
+    * first instruction.
+    */
+   nir_instr *first_instr = nir_block_first_instr(block);
+   if (first_instr == NULL)
+      return true; /* Empty, nothing to do. */
+
+   if (first_instr->type == nir_instr_type_parallel_copy) {
+      nir_parallel_copy_instr *pcopy = nir_instr_as_parallel_copy(first_instr);
+
+      resolve_parallel_copy(pcopy, state);
+   }
+
+   /* It's possible that the above code already cleaned up the end parallel
+    * copy.  However, doing so removed it form the instructions list so we
+    * won't find it here.  Therefore, it's safe to go ahead and just look
+    * for one and clean it up if it exists.
+    */
+   nir_parallel_copy_instr *end_pcopy =
+      get_parallel_copy_at_end_of_block(block);
+   if (end_pcopy)
+      resolve_parallel_copy(end_pcopy, state);
+
+   return true;
+}
+
+static void
+nir_convert_from_ssa_impl(nir_function_impl *impl, bool phi_webs_only)
+{
+   struct from_ssa_state state;
+
+   state.mem_ctx = ralloc_parent(impl);
+   state.dead_ctx = ralloc_context(NULL);
+   state.impl = impl;
+   state.phi_webs_only = phi_webs_only;
+   state.merge_node_table = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
+                                                    _mesa_key_pointer_equal);
+
+   nir_foreach_block(impl, add_parallel_copy_to_end_of_block, &state);
+   nir_foreach_block(impl, isolate_phi_nodes_block, &state);
+
+   /* Mark metadata as dirty before we ask for liveness analysis */
+   nir_metadata_preserve(impl, nir_metadata_block_index |
+                               nir_metadata_dominance);
+
+   nir_metadata_require(impl, nir_metadata_live_ssa_defs |
+                              nir_metadata_dominance);
+
+   nir_foreach_block(impl, coalesce_phi_nodes_block, &state);
+   nir_foreach_block(impl, aggressive_coalesce_block, &state);
+
+   nir_foreach_block(impl, resolve_registers_block, &state);
+
+   nir_foreach_block(impl, resolve_parallel_copies_block, &state);
+
+   nir_metadata_preserve(impl, nir_metadata_block_index |
+                               nir_metadata_dominance);
+
+   /* Clean up dead instructions and the hash tables */
+   _mesa_hash_table_destroy(state.merge_node_table, NULL);
+   ralloc_free(state.dead_ctx);
+}
+
+void
+nir_convert_from_ssa(nir_shader *shader, bool phi_webs_only)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         nir_convert_from_ssa_impl(function->impl, phi_webs_only);
+   }
+}
diff --git a/src/compiler/nir/nir_gather_info.c b/src/compiler/nir/nir_gather_info.c
new file mode 100644
index 00000000000..b84915c2d2b
--- /dev/null
+++ b/src/compiler/nir/nir_gather_info.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "nir.h"
+
+static void
+gather_intrinsic_info(nir_intrinsic_instr *instr, nir_shader *shader)
+{
+   switch (instr->intrinsic) {
+   case nir_intrinsic_discard:
+      assert(shader->stage == MESA_SHADER_FRAGMENT);
+      shader->info.fs.uses_discard = true;
+      break;
+
+   case nir_intrinsic_load_front_face:
+   case nir_intrinsic_load_vertex_id:
+   case nir_intrinsic_load_vertex_id_zero_base:
+   case nir_intrinsic_load_base_vertex:
+   case nir_intrinsic_load_instance_id:
+   case nir_intrinsic_load_sample_id:
+   case nir_intrinsic_load_sample_pos:
+   case nir_intrinsic_load_sample_mask_in:
+   case nir_intrinsic_load_primitive_id:
+   case nir_intrinsic_load_invocation_id:
+   case nir_intrinsic_load_local_invocation_id:
+   case nir_intrinsic_load_work_group_id:
+   case nir_intrinsic_load_num_work_groups:
+      shader->info.system_values_read |=
+         (1 << nir_system_value_from_intrinsic(instr->intrinsic));
+      break;
+
+   case nir_intrinsic_end_primitive:
+   case nir_intrinsic_end_primitive_with_counter:
+      assert(shader->stage == MESA_SHADER_GEOMETRY);
+      shader->info.gs.uses_end_primitive = 1;
+      break;
+
+   default:
+      break;
+   }
+}
+
+static void
+gather_tex_info(nir_tex_instr *instr, nir_shader *shader)
+{
+   if (instr->op == nir_texop_tg4)
+      shader->info.uses_texture_gather = true;
+}
+
+static bool
+gather_info_block(nir_block *block, void *shader)
+{
+   nir_foreach_instr(block, instr) {
+      switch (instr->type) {
+      case nir_instr_type_intrinsic:
+         gather_intrinsic_info(nir_instr_as_intrinsic(instr), shader);
+         break;
+      case nir_instr_type_tex:
+         gather_tex_info(nir_instr_as_tex(instr), shader);
+         break;
+      case nir_instr_type_call:
+         assert(!"nir_shader_gather_info only works if functions are inlined");
+         break;
+      default:
+         break;
+      }
+   }
+
+   return true;
+}
+
+void
+nir_shader_gather_info(nir_shader *shader, nir_function_impl *entrypoint)
+{
+   shader->info.inputs_read = 0;
+   foreach_list_typed(nir_variable, var, node, &shader->inputs)
+      shader->info.inputs_read |= nir_variable_get_io_mask(var, shader->stage);
+
+   /* TODO: Some day we may need to add stream support to NIR */
+   shader->info.outputs_written = 0;
+   foreach_list_typed(nir_variable, var, node, &shader->outputs)
+      shader->info.outputs_written |= nir_variable_get_io_mask(var, shader->stage);
+
+   shader->info.system_values_read = 0;
+   foreach_list_typed(nir_variable, var, node, &shader->system_values)
+      shader->info.system_values_read |= nir_variable_get_io_mask(var, shader->stage);
+
+   nir_foreach_block(entrypoint, gather_info_block, shader);
+}
diff --git a/src/compiler/nir/nir_gs_count_vertices.c b/src/compiler/nir/nir_gs_count_vertices.c
new file mode 100644
index 00000000000..db15d160ee7
--- /dev/null
+++ b/src/compiler/nir/nir_gs_count_vertices.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+
+static nir_intrinsic_instr *
+as_intrinsic(nir_instr *instr, nir_intrinsic_op op)
+{
+   if (instr->type != nir_instr_type_intrinsic)
+      return NULL;
+
+   nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+   if (intrin->intrinsic != op)
+      return NULL;
+
+   return intrin;
+}
+
+static nir_intrinsic_instr *
+as_set_vertex_count(nir_instr *instr)
+{
+   return as_intrinsic(instr, nir_intrinsic_set_vertex_count);
+}
+
+/**
+ * If a geometry shader emits a constant number of vertices, return the
+ * number of vertices.  Otherwise, return -1 (unknown).
+ *
+ * This only works if you've used nir_lower_gs_intrinsics() to do vertex
+ * counting at the NIR level.
+ */
+int
+nir_gs_count_vertices(const nir_shader *shader)
+{
+   int count = -1;
+
+   nir_foreach_function(shader, function) {
+      if (!function->impl)
+         continue;
+
+      /* set_vertex_count intrinsics only appear in predecessors of the
+       * end block.  So we don't need to walk all of them.
+       */
+      struct set_entry *entry;
+      set_foreach(function->impl->end_block->predecessors, entry) {
+         nir_block *block = (nir_block *) entry->key;
+
+         nir_foreach_instr_reverse(block, instr) {
+            nir_intrinsic_instr *intrin = as_set_vertex_count(instr);
+            if (!intrin)
+               continue;
+
+            nir_const_value *val = nir_src_as_const_value(intrin->src[0]);
+            /* We've found a non-constant value.  Bail. */
+            if (!val)
+               return -1;
+
+            if (count == -1)
+               count = val->i[0];
+
+            /* We've found contradictory set_vertex_count intrinsics.
+             * This can happen if there are early-returns in main() and
+             * different paths emit different numbers of vertices.
+             */
+            if (count != val->i[0])
+               return -1;
+         }
+      }
+   }
+
+   return count;
+}
diff --git a/src/compiler/nir/nir_inline_functions.c b/src/compiler/nir/nir_inline_functions.c
new file mode 100644
index 00000000000..3cf83279053
--- /dev/null
+++ b/src/compiler/nir/nir_inline_functions.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+#include "nir_control_flow.h"
+
+struct inline_functions_state {
+   struct set *inlined;
+   nir_builder builder;
+   bool progress;
+};
+
+static bool inline_function_impl(nir_function_impl *impl, struct set *inlined);
+
+static bool
+inline_functions_block(nir_block *block, void *void_state)
+{
+   struct inline_functions_state *state = void_state;
+
+   nir_builder *b = &state->builder;
+
+   /* This is tricky.  We're iterating over instructions in a block but, as
+    * we go, the block and its instruction list are being split into
+    * pieces.  However, this *should* be safe since foreach_safe always
+    * stashes the next thing in the iteration.  That next thing will
+    * properly get moved to the next block when it gets split, and we
+    * continue iterating there.
+    */
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_call)
+         continue;
+
+      state->progress = true;
+
+      nir_call_instr *call = nir_instr_as_call(instr);
+      assert(call->callee->impl);
+
+      inline_function_impl(call->callee->impl, state->inlined);
+
+      nir_function_impl *callee_copy =
+         nir_function_impl_clone(call->callee->impl);
+
+      exec_list_append(&b->impl->locals, &callee_copy->locals);
+      exec_list_append(&b->impl->registers, &callee_copy->registers);
+
+      b->cursor = nir_before_instr(&call->instr);
+
+      /* Add copies of all in parameters */
+      assert(call->num_params == callee_copy->num_params);
+      for (unsigned i = 0; i < callee_copy->num_params; i++) {
+         /* Only in or inout parameters */
+         if (call->callee->params[i].param_type == nir_parameter_out)
+            continue;
+
+         nir_copy_deref_var(b, nir_deref_var_create(b->shader,
+                                                    callee_copy->params[i]),
+                               call->params[i]);
+      }
+
+      /* Pluck the body out of the function and place it here */
+      nir_cf_list body;
+      nir_cf_list_extract(&body, &callee_copy->body);
+      nir_cf_reinsert(&body, b->cursor);
+
+      b->cursor = nir_before_instr(&call->instr);
+
+      /* Add copies of all out parameters and the return */
+      assert(call->num_params == callee_copy->num_params);
+      for (unsigned i = 0; i < callee_copy->num_params; i++) {
+         /* Only out or inout parameters */
+         if (call->callee->params[i].param_type == nir_parameter_in)
+            continue;
+
+         nir_copy_deref_var(b, call->params[i],
+                               nir_deref_var_create(b->shader,
+                                                    callee_copy->params[i]));
+      }
+      if (!glsl_type_is_void(call->callee->return_type)) {
+         nir_copy_deref_var(b, call->return_deref,
+                               nir_deref_var_create(b->shader,
+                                                    callee_copy->return_var));
+      }
+
+      nir_instr_remove(&call->instr);
+   }
+
+   return true;
+}
+
+static bool
+inline_function_impl(nir_function_impl *impl, struct set *inlined)
+{
+   if (_mesa_set_search(inlined, impl))
+      return false; /* Already inlined */
+
+   struct inline_functions_state state;
+
+   state.inlined = inlined;
+   state.progress = false;
+   nir_builder_init(&state.builder, impl);
+
+   nir_foreach_block(impl, inline_functions_block, &state);
+
+   if (state.progress) {
+      /* SSA and register indices are completely messed up now */
+      nir_index_ssa_defs(impl);
+      nir_index_local_regs(impl);
+
+      nir_metadata_preserve(impl, nir_metadata_none);
+   }
+
+   _mesa_set_add(inlined, impl);
+
+   return state.progress;
+}
+
+bool
+nir_inline_functions(nir_shader *shader)
+{
+   struct set *inlined = _mesa_set_create(NULL, _mesa_hash_pointer,
+                                          _mesa_key_pointer_equal);
+   bool progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         progress = inline_function_impl(function->impl, inlined) || progress;
+   }
+
+   _mesa_set_destroy(inlined, NULL);
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_instr_set.c b/src/compiler/nir/nir_instr_set.c
new file mode 100644
index 00000000000..eb021326097
--- /dev/null
+++ b/src/compiler/nir/nir_instr_set.c
@@ -0,0 +1,522 @@
+/*
+ * Copyright © 2014 Connor Abbott
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "nir_instr_set.h"
+#include "nir_vla.h"
+
+#define HASH(hash, data) _mesa_fnv32_1a_accumulate((hash), (data))
+
+static uint32_t
+hash_src(uint32_t hash, const nir_src *src)
+{
+   assert(src->is_ssa);
+   hash = HASH(hash, src->ssa);
+   return hash;
+}
+
+static uint32_t
+hash_alu_src(uint32_t hash, const nir_alu_src *src, unsigned num_components)
+{
+   hash = HASH(hash, src->abs);
+   hash = HASH(hash, src->negate);
+
+   for (unsigned i = 0; i < num_components; i++)
+      hash = HASH(hash, src->swizzle[i]);
+
+   hash = hash_src(hash, &src->src);
+   return hash;
+}
+
+static uint32_t
+hash_alu(uint32_t hash, const nir_alu_instr *instr)
+{
+   hash = HASH(hash, instr->op);
+   hash = HASH(hash, instr->dest.dest.ssa.num_components);
+
+   if (nir_op_infos[instr->op].algebraic_properties & NIR_OP_IS_COMMUTATIVE) {
+      assert(nir_op_infos[instr->op].num_inputs == 2);
+      uint32_t hash0 = hash_alu_src(hash, &instr->src[0],
+                                    nir_ssa_alu_instr_src_components(instr, 0));
+      uint32_t hash1 = hash_alu_src(hash, &instr->src[1],
+                                    nir_ssa_alu_instr_src_components(instr, 1));
+      /* For commutative operations, we need some commutative way of
+       * combining the hashes.  One option would be to XOR them but that
+       * means that anything with two identical sources will hash to 0 and
+       * that's common enough we probably don't want the guaranteed
+       * collision.  Either addition or multiplication will also work.
+       */
+      hash = hash0 * hash1;
+   } else {
+      for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) {
+         hash = hash_alu_src(hash, &instr->src[i],
+                             nir_ssa_alu_instr_src_components(instr, i));
+      }
+   }
+
+   return hash;
+}
+
+static uint32_t
+hash_load_const(uint32_t hash, const nir_load_const_instr *instr)
+{
+   hash = HASH(hash, instr->def.num_components);
+
+   hash = _mesa_fnv32_1a_accumulate_block(hash, instr->value.f,
+                                          instr->def.num_components
+                                             * sizeof(instr->value.f[0]));
+
+   return hash;
+}
+
+static int
+cmp_phi_src(const void *data1, const void *data2)
+{
+   nir_phi_src *src1 = *(nir_phi_src **)data1;
+   nir_phi_src *src2 = *(nir_phi_src **)data2;
+   return src1->pred - src2->pred;
+}
+
+static uint32_t
+hash_phi(uint32_t hash, const nir_phi_instr *instr)
+{
+   hash = HASH(hash, instr->instr.block);
+
+   /* sort sources by predecessor, since the order shouldn't matter */
+   unsigned num_preds = instr->instr.block->predecessors->entries;
+   NIR_VLA(nir_phi_src *, srcs, num_preds);
+   unsigned i = 0;
+   nir_foreach_phi_src(instr, src) {
+      srcs[i++] = src;
+   }
+
+   qsort(srcs, num_preds, sizeof(nir_phi_src *), cmp_phi_src);
+
+   for (i = 0; i < num_preds; i++) {
+      hash = hash_src(hash, &srcs[i]->src);
+      hash = HASH(hash, srcs[i]->pred);
+   }
+
+   return hash;
+}
+
+static uint32_t
+hash_intrinsic(uint32_t hash, const nir_intrinsic_instr *instr)
+{
+   const nir_intrinsic_info *info = &nir_intrinsic_infos[instr->intrinsic];
+   hash = HASH(hash, instr->intrinsic);
+
+   if (info->has_dest)
+      hash = HASH(hash, instr->dest.ssa.num_components);
+
+   assert(info->num_variables == 0);
+
+   hash = _mesa_fnv32_1a_accumulate_block(hash, instr->const_index,
+                                          info->num_indices
+                                             * sizeof(instr->const_index[0]));
+   return hash;
+}
+
+static uint32_t
+hash_tex(uint32_t hash, const nir_tex_instr *instr)
+{
+   hash = HASH(hash, instr->op);
+   hash = HASH(hash, instr->num_srcs);
+
+   for (unsigned i = 0; i < instr->num_srcs; i++) {
+      hash = HASH(hash, instr->src[i].src_type);
+      hash = hash_src(hash, &instr->src[i].src);
+   }
+
+   hash = HASH(hash, instr->coord_components);
+   hash = HASH(hash, instr->sampler_dim);
+   hash = HASH(hash, instr->is_array);
+   hash = HASH(hash, instr->is_shadow);
+   hash = HASH(hash, instr->is_new_style_shadow);
+   hash = HASH(hash, instr->const_offset);
+   unsigned component = instr->component;
+   hash = HASH(hash, component);
+   hash = HASH(hash, instr->texture_index);
+   hash = HASH(hash, instr->texture_array_size);
+   hash = HASH(hash, instr->sampler_index);
+
+   assert(!instr->sampler);
+
+   return hash;
+}
+
+/* Computes a hash of an instruction for use in a hash table. Note that this
+ * will only work for instructions where instr_can_rewrite() returns true, and
+ * it should return identical hashes for two instructions that are the same
+ * according nir_instrs_equal().
+ */
+
+static uint32_t
+hash_instr(const void *data)
+{
+   const nir_instr *instr = data;
+   uint32_t hash = _mesa_fnv32_1a_offset_bias;
+
+   switch (instr->type) {
+   case nir_instr_type_alu:
+      hash = hash_alu(hash, nir_instr_as_alu(instr));
+      break;
+   case nir_instr_type_load_const:
+      hash = hash_load_const(hash, nir_instr_as_load_const(instr));
+      break;
+   case nir_instr_type_phi:
+      hash = hash_phi(hash, nir_instr_as_phi(instr));
+      break;
+   case nir_instr_type_intrinsic:
+      hash = hash_intrinsic(hash, nir_instr_as_intrinsic(instr));
+      break;
+   case nir_instr_type_tex:
+      hash = hash_tex(hash, nir_instr_as_tex(instr));
+      break;
+   default:
+      unreachable("Invalid instruction type");
+   }
+
+   return hash;
+}
+
+bool
+nir_srcs_equal(nir_src src1, nir_src src2)
+{
+   if (src1.is_ssa) {
+      if (src2.is_ssa) {
+         return src1.ssa == src2.ssa;
+      } else {
+         return false;
+      }
+   } else {
+      if (src2.is_ssa) {
+         return false;
+      } else {
+         if ((src1.reg.indirect == NULL) != (src2.reg.indirect == NULL))
+            return false;
+
+         if (src1.reg.indirect) {
+            if (!nir_srcs_equal(*src1.reg.indirect, *src2.reg.indirect))
+               return false;
+         }
+
+         return src1.reg.reg == src2.reg.reg &&
+                src1.reg.base_offset == src2.reg.base_offset;
+      }
+   }
+}
+
+static bool
+nir_alu_srcs_equal(const nir_alu_instr *alu1, const nir_alu_instr *alu2,
+                   unsigned src1, unsigned src2)
+{
+   if (alu1->src[src1].abs != alu2->src[src2].abs ||
+       alu1->src[src1].negate != alu2->src[src2].negate)
+      return false;
+
+   for (unsigned i = 0; i < nir_ssa_alu_instr_src_components(alu1, src1); i++) {
+      if (alu1->src[src1].swizzle[i] != alu2->src[src2].swizzle[i])
+         return false;
+   }
+
+   return nir_srcs_equal(alu1->src[src1].src, alu2->src[src2].src);
+}
+
+/* Returns "true" if two instructions are equal. Note that this will only
+ * work for the subset of instructions defined by instr_can_rewrite(). Also,
+ * it should only return "true" for instructions that hash_instr() will return
+ * the same hash for (ignoring collisions, of course).
+ */
+
+static bool
+nir_instrs_equal(const nir_instr *instr1, const nir_instr *instr2)
+{
+   if (instr1->type != instr2->type)
+      return false;
+
+   switch (instr1->type) {
+   case nir_instr_type_alu: {
+      nir_alu_instr *alu1 = nir_instr_as_alu(instr1);
+      nir_alu_instr *alu2 = nir_instr_as_alu(instr2);
+
+      if (alu1->op != alu2->op)
+         return false;
+
+      /* TODO: We can probably acutally do something more inteligent such
+       * as allowing different numbers and taking a maximum or something
+       * here */
+      if (alu1->dest.dest.ssa.num_components != alu2->dest.dest.ssa.num_components)
+         return false;
+
+      if (nir_op_infos[alu1->op].algebraic_properties & NIR_OP_IS_COMMUTATIVE) {
+         assert(nir_op_infos[alu1->op].num_inputs == 2);
+         return (nir_alu_srcs_equal(alu1, alu2, 0, 0) &&
+                 nir_alu_srcs_equal(alu1, alu2, 1, 1)) ||
+                (nir_alu_srcs_equal(alu1, alu2, 0, 1) &&
+                 nir_alu_srcs_equal(alu1, alu2, 1, 0));
+      } else {
+         for (unsigned i = 0; i < nir_op_infos[alu1->op].num_inputs; i++) {
+            if (!nir_alu_srcs_equal(alu1, alu2, i, i))
+               return false;
+         }
+      }
+      return true;
+   }
+   case nir_instr_type_tex: {
+      nir_tex_instr *tex1 = nir_instr_as_tex(instr1);
+      nir_tex_instr *tex2 = nir_instr_as_tex(instr2);
+
+      if (tex1->op != tex2->op)
+         return false;
+
+      if (tex1->num_srcs != tex2->num_srcs)
+         return false;
+      for (unsigned i = 0; i < tex1->num_srcs; i++) {
+         if (tex1->src[i].src_type != tex2->src[i].src_type ||
+             !nir_srcs_equal(tex1->src[i].src, tex2->src[i].src)) {
+            return false;
+         }
+      }
+
+      if (tex1->coord_components != tex2->coord_components ||
+          tex1->sampler_dim != tex2->sampler_dim ||
+          tex1->is_array != tex2->is_array ||
+          tex1->is_shadow != tex2->is_shadow ||
+          tex1->is_new_style_shadow != tex2->is_new_style_shadow ||
+          memcmp(tex1->const_offset, tex2->const_offset,
+                 sizeof(tex1->const_offset)) != 0 ||
+          tex1->component != tex2->component ||
+         tex1->texture_index != tex2->texture_index ||
+         tex1->texture_array_size != tex2->texture_array_size ||
+         tex1->sampler_index != tex2->sampler_index) {
+         return false;
+      }
+
+      /* Don't support un-lowered sampler derefs currently. */
+      assert(!tex1->texture && !tex1->sampler &&
+             !tex2->texture && !tex2->sampler);
+
+      return true;
+   }
+   case nir_instr_type_load_const: {
+      nir_load_const_instr *load1 = nir_instr_as_load_const(instr1);
+      nir_load_const_instr *load2 = nir_instr_as_load_const(instr2);
+
+      if (load1->def.num_components != load2->def.num_components)
+         return false;
+
+      return memcmp(load1->value.f, load2->value.f,
+                    load1->def.num_components * sizeof(*load2->value.f)) == 0;
+   }
+   case nir_instr_type_phi: {
+      nir_phi_instr *phi1 = nir_instr_as_phi(instr1);
+      nir_phi_instr *phi2 = nir_instr_as_phi(instr2);
+
+      if (phi1->instr.block != phi2->instr.block)
+         return false;
+
+      nir_foreach_phi_src(phi1, src1) {
+         nir_foreach_phi_src(phi2, src2) {
+            if (src1->pred == src2->pred) {
+               if (!nir_srcs_equal(src1->src, src2->src))
+                  return false;
+
+               break;
+            }
+         }
+      }
+
+      return true;
+   }
+   case nir_instr_type_intrinsic: {
+      nir_intrinsic_instr *intrinsic1 = nir_instr_as_intrinsic(instr1);
+      nir_intrinsic_instr *intrinsic2 = nir_instr_as_intrinsic(instr2);
+      const nir_intrinsic_info *info =
+         &nir_intrinsic_infos[intrinsic1->intrinsic];
+
+      if (intrinsic1->intrinsic != intrinsic2->intrinsic ||
+          intrinsic1->num_components != intrinsic2->num_components)
+         return false;
+
+      if (info->has_dest && intrinsic1->dest.ssa.num_components !=
+                            intrinsic2->dest.ssa.num_components)
+         return false;
+
+      for (unsigned i = 0; i < info->num_srcs; i++) {
+         if (!nir_srcs_equal(intrinsic1->src[i], intrinsic2->src[i]))
+            return false;
+      }
+
+      assert(info->num_variables == 0);
+
+      for (unsigned i = 0; i < info->num_indices; i++) {
+         if (intrinsic1->const_index[i] != intrinsic2->const_index[i])
+            return false;
+      }
+
+      return true;
+   }
+   case nir_instr_type_call:
+   case nir_instr_type_jump:
+   case nir_instr_type_ssa_undef:
+   case nir_instr_type_parallel_copy:
+   default:
+      unreachable("Invalid instruction type");
+   }
+
+   return false;
+}
+
+static bool
+src_is_ssa(nir_src *src, void *data)
+{
+   (void) data;
+   return src->is_ssa;
+}
+
+static bool
+dest_is_ssa(nir_dest *dest, void *data)
+{
+   (void) data;
+   return dest->is_ssa;
+}
+
+/* This function determines if uses of an instruction can safely be rewritten
+ * to use another identical instruction instead. Note that this function must
+ * be kept in sync with hash_instr() and nir_instrs_equal() -- only
+ * instructions that pass this test will be handed on to those functions, and
+ * conversely they must handle everything that this function returns true for.
+ */
+
+static bool
+instr_can_rewrite(nir_instr *instr)
+{
+   /* We only handle SSA. */
+   if (!nir_foreach_dest(instr, dest_is_ssa, NULL) ||
+       !nir_foreach_src(instr, src_is_ssa, NULL))
+      return false;
+
+   switch (instr->type) {
+   case nir_instr_type_alu:
+   case nir_instr_type_load_const:
+   case nir_instr_type_phi:
+      return true;
+   case nir_instr_type_tex: {
+      nir_tex_instr *tex = nir_instr_as_tex(instr);
+
+      /* Don't support un-lowered sampler derefs currently. */
+      if (tex->texture || tex->sampler)
+         return false;
+
+      return true;
+   }
+   case nir_instr_type_intrinsic: {
+      const nir_intrinsic_info *info =
+         &nir_intrinsic_infos[nir_instr_as_intrinsic(instr)->intrinsic];
+      return (info->flags & NIR_INTRINSIC_CAN_ELIMINATE) &&
+             (info->flags & NIR_INTRINSIC_CAN_REORDER) &&
+             info->num_variables == 0; /* not implemented yet */
+   }
+   case nir_instr_type_call:
+   case nir_instr_type_jump:
+   case nir_instr_type_ssa_undef:
+      return false;
+   case nir_instr_type_parallel_copy:
+   default:
+      unreachable("Invalid instruction type");
+   }
+
+   return false;
+}
+
+static nir_ssa_def *
+nir_instr_get_dest_ssa_def(nir_instr *instr)
+{
+   switch (instr->type) {
+   case nir_instr_type_alu:
+      assert(nir_instr_as_alu(instr)->dest.dest.is_ssa);
+      return &nir_instr_as_alu(instr)->dest.dest.ssa;
+   case nir_instr_type_load_const:
+      return &nir_instr_as_load_const(instr)->def;
+   case nir_instr_type_phi:
+      assert(nir_instr_as_phi(instr)->dest.is_ssa);
+      return &nir_instr_as_phi(instr)->dest.ssa;
+   case nir_instr_type_intrinsic:
+      assert(nir_instr_as_intrinsic(instr)->dest.is_ssa);
+      return &nir_instr_as_intrinsic(instr)->dest.ssa;
+   case nir_instr_type_tex:
+      assert(nir_instr_as_tex(instr)->dest.is_ssa);
+      return &nir_instr_as_tex(instr)->dest.ssa;
+   default:
+      unreachable("We never ask for any of these");
+   }
+}
+
+static bool
+cmp_func(const void *data1, const void *data2)
+{
+   return nir_instrs_equal(data1, data2);
+}
+
+struct set *
+nir_instr_set_create(void *mem_ctx)
+{
+   return _mesa_set_create(mem_ctx, hash_instr, cmp_func);
+}
+
+void
+nir_instr_set_destroy(struct set *instr_set)
+{
+   _mesa_set_destroy(instr_set, NULL);
+}
+
+bool
+nir_instr_set_add_or_rewrite(struct set *instr_set, nir_instr *instr)
+{
+   if (!instr_can_rewrite(instr))
+      return false;
+
+   struct set_entry *entry = _mesa_set_search(instr_set, instr);
+   if (entry) {
+      nir_ssa_def *def = nir_instr_get_dest_ssa_def(instr);
+      nir_ssa_def *new_def =
+         nir_instr_get_dest_ssa_def((nir_instr *) entry->key);
+      nir_ssa_def_rewrite_uses(def, nir_src_for_ssa(new_def));
+      return true;
+   }
+
+   _mesa_set_add(instr_set, instr);
+   return false;
+}
+
+void
+nir_instr_set_remove(struct set *instr_set, nir_instr *instr)
+{
+   if (!instr_can_rewrite(instr))
+      return;
+
+   struct set_entry *entry = _mesa_set_search(instr_set, instr);
+   if (entry)
+      _mesa_set_remove(instr_set, entry);
+}
+
diff --git a/src/compiler/nir/nir_instr_set.h b/src/compiler/nir/nir_instr_set.h
new file mode 100644
index 00000000000..939e8ddbf58
--- /dev/null
+++ b/src/compiler/nir/nir_instr_set.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright © 2014 Connor Abbott
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#pragma once
+
+#include "nir.h"
+
+/**
+ * This file defines functions for creating, destroying, and manipulating an
+ * "instruction set," which is an abstraction for finding duplicate
+ * instructions using a hash set. Note that the question of whether an
+ * instruction is actually a duplicate (e.g. whether it has any side effects)
+ * is handled transparently. The user can pass any instruction to
+ * nir_instr_set_add_or_rewrite() and nir_instr_set_remove(), and if the
+ * instruction isn't safe to rewrite or isn't supported, it's silently
+ * removed.
+ */
+
+/*@{*/
+
+/** Creates an instruction set, using a given ralloc mem_ctx */
+struct set *nir_instr_set_create(void *mem_ctx);
+
+/** Destroys an instruction set. */
+void nir_instr_set_destroy(struct set *instr_set);
+
+/**
+ * Adds an instruction to an instruction set if it doesn't exist, or if it
+ * does already exist, rewrites all uses of it to point to the other
+ * already-inserted instruction. Returns 'true' if the uses of the instruction
+ * were rewritten.
+ */
+bool nir_instr_set_add_or_rewrite(struct set *instr_set, nir_instr *instr);
+
+/**
+ * Removes an instruction from an instruction set, so that other instructions
+ * won't be merged with it.
+ */
+void nir_instr_set_remove(struct set *instr_set, nir_instr *instr);
+
+/*@}*/
+
diff --git a/src/compiler/nir/nir_intrinsics.c b/src/compiler/nir/nir_intrinsics.c
new file mode 100644
index 00000000000..a7c868c39af
--- /dev/null
+++ b/src/compiler/nir/nir_intrinsics.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+
+#define OPCODE(name) nir_intrinsic_##name
+
+#define INTRINSIC(_name, _num_srcs, _src_components, _has_dest, \
+                  _dest_components, _num_variables, _num_indices, _flags) \
+{ \
+   .name = #_name, \
+   .num_srcs = _num_srcs, \
+   .src_components = _src_components, \
+   .has_dest = _has_dest, \
+   .dest_components = _dest_components, \
+   .num_variables = _num_variables, \
+   .num_indices = _num_indices, \
+   .flags = _flags \
+},
+
+#define LAST_INTRINSIC(name)
+
+const nir_intrinsic_info nir_intrinsic_infos[nir_num_intrinsics] = {
+#include "nir_intrinsics.h"
+};
\ No newline at end of file
diff --git a/src/compiler/nir/nir_intrinsics.h b/src/compiler/nir/nir_intrinsics.h
new file mode 100644
index 00000000000..3e7cf735a1b
--- /dev/null
+++ b/src/compiler/nir/nir_intrinsics.h
@@ -0,0 +1,367 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+/**
+ * This header file defines all the available intrinsics in one place. It
+ * expands to a list of macros of the form:
+ *
+ * INTRINSIC(name, num_srcs, src_components, has_dest, dest_components,
+ *              num_variables, num_indices, flags)
+ *
+ * Which should correspond one-to-one with the nir_intrinsic_info structure. It
+ * is included in both ir.h to create the nir_intrinsic enum (with members of
+ * the form nir_intrinsic_(name)) and and in opcodes.c to create
+ * nir_intrinsic_infos, which is a const array of nir_intrinsic_info structures
+ * for each intrinsic.
+ */
+
+#define ARR(...) { __VA_ARGS__ }
+
+
+INTRINSIC(load_var, 0, ARR(), true, 0, 1, 0, NIR_INTRINSIC_CAN_ELIMINATE)
+INTRINSIC(store_var, 1, ARR(0), false, 0, 1, 1, 0)
+INTRINSIC(copy_var, 0, ARR(), false, 0, 2, 0, 0)
+
+/*
+ * Interpolation of input.  The interp_var_at* intrinsics are similar to the
+ * load_var intrinsic acting an a shader input except that they interpolate
+ * the input differently.  The at_sample and at_offset intrinsics take an
+ * aditional source that is a integer sample id or a vec2 position offset
+ * respectively.
+ */
+
+INTRINSIC(interp_var_at_centroid, 0, ARR(0), true, 0, 1, 0,
+          NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+INTRINSIC(interp_var_at_sample, 1, ARR(1), true, 0, 1, 0,
+          NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+INTRINSIC(interp_var_at_offset, 1, ARR(2), true, 0, 1, 0,
+          NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+
+/*
+ * Ask the driver for the size of a given buffer. It takes the buffer index
+ * as source.
+ */
+INTRINSIC(get_buffer_size, 1, ARR(1), true, 1, 0, 0,
+          NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+
+/*
+ * a barrier is an intrinsic with no inputs/outputs but which can't be moved
+ * around/optimized in general
+ */
+#define BARRIER(name) INTRINSIC(name, 0, ARR(), false, 0, 0, 0, 0)
+
+BARRIER(barrier)
+BARRIER(discard)
+
+/*
+ * Memory barrier with semantics analogous to the memoryBarrier() GLSL
+ * intrinsic.
+ */
+BARRIER(memory_barrier)
+
+/*
+ * Shader clock intrinsic with semantics analogous to the clock2x32ARB()
+ * GLSL intrinsic.
+ * The latter can be used as code motion barrier, which is currently not
+ * feasible with NIR.
+ */
+INTRINSIC(shader_clock, 0, ARR(), true, 1, 0, 0, NIR_INTRINSIC_CAN_ELIMINATE)
+
+/*
+ * Memory barrier with semantics analogous to the compute shader
+ * groupMemoryBarrier(), memoryBarrierAtomicCounter(), memoryBarrierBuffer(),
+ * memoryBarrierImage() and memoryBarrierShared() GLSL intrinsics.
+ */
+BARRIER(group_memory_barrier)
+BARRIER(memory_barrier_atomic_counter)
+BARRIER(memory_barrier_buffer)
+BARRIER(memory_barrier_image)
+BARRIER(memory_barrier_shared)
+
+/** A conditional discard, with a single boolean source. */
+INTRINSIC(discard_if, 1, ARR(1), false, 0, 0, 0, 0)
+
+/**
+ * Basic Geometry Shader intrinsics.
+ *
+ * emit_vertex implements GLSL's EmitStreamVertex() built-in.  It takes a single
+ * index, which is the stream ID to write to.
+ *
+ * end_primitive implements GLSL's EndPrimitive() built-in.
+ */
+INTRINSIC(emit_vertex,   0, ARR(), false, 0, 0, 1, 0)
+INTRINSIC(end_primitive, 0, ARR(), false, 0, 0, 1, 0)
+
+/**
+ * Geometry Shader intrinsics with a vertex count.
+ *
+ * Alternatively, drivers may implement these intrinsics, and use
+ * nir_lower_gs_intrinsics() to convert from the basic intrinsics.
+ *
+ * These maintain a count of the number of vertices emitted, as an additional
+ * unsigned integer source.
+ */
+INTRINSIC(emit_vertex_with_counter, 1, ARR(1), false, 0, 0, 1, 0)
+INTRINSIC(end_primitive_with_counter, 1, ARR(1), false, 0, 0, 1, 0)
+INTRINSIC(set_vertex_count, 1, ARR(1), false, 0, 0, 0, 0)
+
+/*
+ * Atomic counters
+ *
+ * The *_var variants take an atomic_uint nir_variable, while the other,
+ * lowered, variants take a constant buffer index and register offset.
+ */
+
+#define ATOMIC(name, flags) \
+   INTRINSIC(atomic_counter_##name##_var, 0, ARR(), true, 1, 1, 0, flags) \
+   INTRINSIC(atomic_counter_##name, 1, ARR(1), true, 1, 0, 1, flags)
+
+ATOMIC(inc, 0)
+ATOMIC(dec, 0)
+ATOMIC(read, NIR_INTRINSIC_CAN_ELIMINATE)
+
+/*
+ * Image load, store and atomic intrinsics.
+ *
+ * All image intrinsics take an image target passed as a nir_variable.  Image
+ * variables contain a number of memory and layout qualifiers that influence
+ * the semantics of the intrinsic.
+ *
+ * All image intrinsics take a four-coordinate vector and a sample index as
+ * first two sources, determining the location within the image that will be
+ * accessed by the intrinsic.  Components not applicable to the image target
+ * in use are undefined.  Image store takes an additional four-component
+ * argument with the value to be written, and image atomic operations take
+ * either one or two additional scalar arguments with the same meaning as in
+ * the ARB_shader_image_load_store specification.
+ */
+INTRINSIC(image_load, 2, ARR(4, 1), true, 4, 1, 0,
+          NIR_INTRINSIC_CAN_ELIMINATE)
+INTRINSIC(image_store, 3, ARR(4, 1, 4), false, 0, 1, 0, 0)
+INTRINSIC(image_atomic_add, 3, ARR(4, 1, 1), true, 1, 1, 0, 0)
+INTRINSIC(image_atomic_min, 3, ARR(4, 1, 1), true, 1, 1, 0, 0)
+INTRINSIC(image_atomic_max, 3, ARR(4, 1, 1), true, 1, 1, 0, 0)
+INTRINSIC(image_atomic_and, 3, ARR(4, 1, 1), true, 1, 1, 0, 0)
+INTRINSIC(image_atomic_or, 3, ARR(4, 1, 1), true, 1, 1, 0, 0)
+INTRINSIC(image_atomic_xor, 3, ARR(4, 1, 1), true, 1, 1, 0, 0)
+INTRINSIC(image_atomic_exchange, 3, ARR(4, 1, 1), true, 1, 1, 0, 0)
+INTRINSIC(image_atomic_comp_swap, 4, ARR(4, 1, 1, 1), true, 1, 1, 0, 0)
+INTRINSIC(image_size, 0, ARR(), true, 4, 1, 0,
+          NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+INTRINSIC(image_samples, 0, ARR(), true, 1, 1, 0,
+          NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+
+/*
+ * Vulkan descriptor set intrinsic
+ *
+ * The Vulkan API uses a different binding model from GL.  In the Vulkan
+ * API, all external resources are represented by a tripple:
+ *
+ * (descriptor set, binding, array index)
+ *
+ * where the array index is the only thing allowed to be indirect.  The
+ * vulkan_surface_index intrinsic takes the descriptor set and binding as
+ * its first two indices and the array index as its source.  The third
+ * index is a nir_variable_mode in case that's useful to the backend.
+ *
+ * The intended usage is that the shader will call vulkan_surface_index to
+ * get an index and then pass that as the buffer index ubo/ssbo calls.
+ */
+INTRINSIC(vulkan_resource_index, 1, ARR(1), true, 1, 0, 3,
+          NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+
+/*
+ * variable atomic intrinsics
+ *
+ * All of these variable atomic memory operations read a value from memory,
+ * compute a new value using one of the operations below, write the new value
+ * to memory, and return the original value read.
+ *
+ * All operations take 1 source except CompSwap that takes 2. These sources
+ * represent:
+ *
+ * 0: The data parameter to the atomic function (i.e. the value to add
+ *    in shared_atomic_add, etc).
+ * 1: For CompSwap only: the second data parameter.
+ *
+ * All operations take 1 variable deref.
+ */
+INTRINSIC(var_atomic_add, 1, ARR(1), true, 1, 1, 0, 0)
+INTRINSIC(var_atomic_imin, 1, ARR(1), true, 1, 1, 0, 0)
+INTRINSIC(var_atomic_umin, 1, ARR(1), true, 1, 1, 0, 0)
+INTRINSIC(var_atomic_imax, 1, ARR(1), true, 1, 1, 0, 0)
+INTRINSIC(var_atomic_umax, 1, ARR(1), true, 1, 1, 0, 0)
+INTRINSIC(var_atomic_and, 1, ARR(1), true, 1, 1, 0, 0)
+INTRINSIC(var_atomic_or, 1, ARR(1), true, 1, 1, 0, 0)
+INTRINSIC(var_atomic_xor, 1, ARR(1), true, 1, 1, 0, 0)
+INTRINSIC(var_atomic_exchange, 1, ARR(1), true, 1, 1, 0, 0)
+INTRINSIC(var_atomic_comp_swap, 2, ARR(1, 1), true, 1, 1, 0, 0)
+
+/*
+ * SSBO atomic intrinsics
+ *
+ * All of the SSBO atomic memory operations read a value from memory,
+ * compute a new value using one of the operations below, write the new
+ * value to memory, and return the original value read.
+ *
+ * All operations take 3 sources except CompSwap that takes 4. These
+ * sources represent:
+ *
+ * 0: The SSBO buffer index.
+ * 1: The offset into the SSBO buffer of the variable that the atomic
+ *    operation will operate on.
+ * 2: The data parameter to the atomic function (i.e. the value to add
+ *    in ssbo_atomic_add, etc).
+ * 3: For CompSwap only: the second data parameter.
+ */
+INTRINSIC(ssbo_atomic_add, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
+INTRINSIC(ssbo_atomic_imin, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
+INTRINSIC(ssbo_atomic_umin, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
+INTRINSIC(ssbo_atomic_imax, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
+INTRINSIC(ssbo_atomic_umax, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
+INTRINSIC(ssbo_atomic_and, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
+INTRINSIC(ssbo_atomic_or, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
+INTRINSIC(ssbo_atomic_xor, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
+INTRINSIC(ssbo_atomic_exchange, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
+INTRINSIC(ssbo_atomic_comp_swap, 4, ARR(1, 1, 1, 1), true, 1, 0, 0, 0)
+
+/*
+ * CS shared variable atomic intrinsics
+ *
+ * All of the shared variable atomic memory operations read a value from
+ * memory, compute a new value using one of the operations below, write the
+ * new value to memory, and return the original value read.
+ *
+ * All operations take 2 sources except CompSwap that takes 3. These
+ * sources represent:
+ *
+ * 0: The offset into the shared variable storage region that the atomic
+ *    operation will operate on.
+ * 1: The data parameter to the atomic function (i.e. the value to add
+ *    in shared_atomic_add, etc).
+ * 2: For CompSwap only: the second data parameter.
+ */
+INTRINSIC(shared_atomic_add, 2, ARR(1, 1), true, 1, 0, 0, 0)
+INTRINSIC(shared_atomic_imin, 2, ARR(1, 1), true, 1, 0, 0, 0)
+INTRINSIC(shared_atomic_umin, 2, ARR(1, 1), true, 1, 0, 0, 0)
+INTRINSIC(shared_atomic_imax, 2, ARR(1, 1), true, 1, 0, 0, 0)
+INTRINSIC(shared_atomic_umax, 2, ARR(1, 1), true, 1, 0, 0, 0)
+INTRINSIC(shared_atomic_and, 2, ARR(1, 1), true, 1, 0, 0, 0)
+INTRINSIC(shared_atomic_or, 2, ARR(1, 1), true, 1, 0, 0, 0)
+INTRINSIC(shared_atomic_xor, 2, ARR(1, 1), true, 1, 0, 0, 0)
+INTRINSIC(shared_atomic_exchange, 2, ARR(1, 1), true, 1, 0, 0, 0)
+INTRINSIC(shared_atomic_comp_swap, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
+
+#define SYSTEM_VALUE(name, components, num_indices) \
+   INTRINSIC(load_##name, 0, ARR(), true, components, 0, num_indices, \
+   NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+
+SYSTEM_VALUE(front_face, 1, 0)
+SYSTEM_VALUE(vertex_id, 1, 0)
+SYSTEM_VALUE(vertex_id_zero_base, 1, 0)
+SYSTEM_VALUE(base_vertex, 1, 0)
+SYSTEM_VALUE(instance_id, 1, 0)
+SYSTEM_VALUE(base_instance, 1, 0)
+SYSTEM_VALUE(draw_id, 1, 0)
+SYSTEM_VALUE(sample_id, 1, 0)
+SYSTEM_VALUE(sample_pos, 2, 0)
+SYSTEM_VALUE(sample_mask_in, 1, 0)
+SYSTEM_VALUE(primitive_id, 1, 0)
+SYSTEM_VALUE(invocation_id, 1, 0)
+SYSTEM_VALUE(tess_coord, 3, 0)
+SYSTEM_VALUE(tess_level_outer, 4, 0)
+SYSTEM_VALUE(tess_level_inner, 2, 0)
+SYSTEM_VALUE(patch_vertices_in, 1, 0)
+SYSTEM_VALUE(local_invocation_id, 3, 0)
+SYSTEM_VALUE(work_group_id, 3, 0)
+SYSTEM_VALUE(user_clip_plane, 4, 1) /* const_index[0] is user_clip_plane[idx] */
+SYSTEM_VALUE(num_work_groups, 3, 0)
+SYSTEM_VALUE(helper_invocation, 1, 0)
+
+/*
+ * Load operations pull data from some piece of GPU memory.  All load
+ * operations operate in terms of offsets into some piece of theoretical
+ * memory.  Loads from externally visible memory (UBO and SSBO) simply take a
+ * byte offset as a source.  Loads from opaque memory (uniforms, inputs, etc.)
+ * take a base+offset pair where the base (const_index[0]) gives the location
+ * of the start of the variable being loaded and and the offset source is a
+ * offset into that variable.
+ *
+ * Uniform load operations have a second index that specifies the size of the
+ * variable being loaded.  If const_index[1] == 0, then the size is unknown.
+ *
+ * Some load operations such as UBO/SSBO load and per_vertex loads take an
+ * additional source to specify which UBO/SSBO/vertex to load from.
+ *
+ * The exact address type depends on the lowering pass that generates the
+ * load/store intrinsics.  Typically, this is vec4 units for things such as
+ * varying slots and float units for fragment shader inputs.  UBO and SSBO
+ * offsets are always in bytes.
+ */
+
+#define LOAD(name, srcs, indices, flags) \
+   INTRINSIC(load_##name, srcs, ARR(1, 1, 1, 1), true, 0, 0, indices, flags)
+
+/* src[] = { offset }. const_index[] = { base, size } */
+LOAD(uniform, 1, 2, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+/* src[] = { buffer_index, offset }. No const_index */
+LOAD(ubo, 2, 0, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+/* src[] = { offset }. const_index[] = { base } */
+LOAD(input, 1, 1, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+/* src[] = { vertex, offset }. const_index[] = { base } */
+LOAD(per_vertex_input, 2, 1, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+/* src[] = { buffer_index, offset }. No const_index */
+LOAD(ssbo, 2, 0, NIR_INTRINSIC_CAN_ELIMINATE)
+/* src[] = { offset }. const_index[] = { base } */
+LOAD(output, 1, 1, NIR_INTRINSIC_CAN_ELIMINATE)
+/* src[] = { vertex, offset }. const_index[] = { base } */
+LOAD(per_vertex_output, 2, 1, NIR_INTRINSIC_CAN_ELIMINATE)
+/* src[] = { offset }. const_index[] = { base } */
+LOAD(shared, 1, 1, NIR_INTRINSIC_CAN_ELIMINATE)
+/* src[] = { offset }. const_index[] = { base, size } */
+LOAD(push_constant, 1, 2, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+
+/*
+ * Stores work the same way as loads, except now the first source is the value
+ * to store and the second (and possibly third) source specify where to store
+ * the value.  SSBO and shared memory stores also have a write mask as
+ * const_index[0].
+ */
+
+#define STORE(name, srcs, indices, flags) \
+   INTRINSIC(store_##name, srcs, ARR(0, 1, 1, 1), false, 0, 0, indices, flags)
+
+/* src[] = { value, offset }. const_index[] = { base, write_mask } */
+STORE(output, 2, 2, 0)
+/* src[] = { value, vertex, offset }. const_index[] = { base, write_mask } */
+STORE(per_vertex_output, 3, 2, 0)
+/* src[] = { value, block_index, offset }. const_index[] = { write_mask } */
+STORE(ssbo, 3, 1, 0)
+/* src[] = { value, offset }. const_index[] = { base, write_mask } */
+STORE(shared, 2, 2, 0)
+
+LAST_INTRINSIC(store_shared)
diff --git a/src/compiler/nir/nir_liveness.c b/src/compiler/nir/nir_liveness.c
new file mode 100644
index 00000000000..05f79d7bc61
--- /dev/null
+++ b/src/compiler/nir/nir_liveness.c
@@ -0,0 +1,297 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ */
+
+#include "nir.h"
+#include "nir_worklist.h"
+#include "nir_vla.h"
+
+/*
+ * Basic liveness analysis.  This works only in SSA form.
+ *
+ * This liveness pass treats phi nodes as being melded to the space between
+ * blocks so that the destinations of a phi are in the livein of the block
+ * in which it resides and the sources are in the liveout of the
+ * corresponding block.  By formulating the liveness information in this
+ * way, we ensure that the definition of any variable dominates its entire
+ * live range.  This is true because the only way that the definition of an
+ * SSA value may not dominate a use is if the use is in a phi node and the
+ * uses in phi no are in the live-out of the corresponding predecessor
+ * block but not in the live-in of the block containing the phi node.
+ */
+
+struct live_ssa_defs_state {
+   unsigned num_ssa_defs;
+   unsigned bitset_words;
+
+   nir_block_worklist worklist;
+};
+
+static bool
+index_ssa_def(nir_ssa_def *def, void *void_state)
+{
+   struct live_ssa_defs_state *state = void_state;
+
+   if (def->parent_instr->type == nir_instr_type_ssa_undef)
+      def->live_index = 0;
+   else
+      def->live_index = state->num_ssa_defs++;
+
+   return true;
+}
+
+static bool
+index_ssa_definitions_block(nir_block *block, void *state)
+{
+   nir_foreach_instr(block, instr)
+      nir_foreach_ssa_def(instr, index_ssa_def, state);
+
+   return true;
+}
+
+/* Initialize the liveness data to zero and add the given block to the
+ * worklist.
+ */
+static bool
+init_liveness_block(nir_block *block, void *void_state)
+{
+   struct live_ssa_defs_state *state = void_state;
+
+   block->live_in = reralloc(block, block->live_in, BITSET_WORD,
+                             state->bitset_words);
+   memset(block->live_in, 0, state->bitset_words * sizeof(BITSET_WORD));
+
+   block->live_out = reralloc(block, block->live_out, BITSET_WORD,
+                              state->bitset_words);
+   memset(block->live_out, 0, state->bitset_words * sizeof(BITSET_WORD));
+
+   nir_block_worklist_push_head(&state->worklist, block);
+
+   return true;
+}
+
+static bool
+set_src_live(nir_src *src, void *void_live)
+{
+   BITSET_WORD *live = void_live;
+
+   if (!src->is_ssa)
+      return true;
+
+   if (src->ssa->live_index == 0)
+      return true;   /* undefined variables are never live */
+
+   BITSET_SET(live, src->ssa->live_index);
+
+   return true;
+}
+
+static bool
+set_ssa_def_dead(nir_ssa_def *def, void *void_live)
+{
+   BITSET_WORD *live = void_live;
+
+   BITSET_CLEAR(live, def->live_index);
+
+   return true;
+}
+
+/** Propagates the live in of succ across the edge to the live out of pred
+ *
+ * Phi nodes exist "between" blocks and all the phi nodes at the start of a
+ * block act "in parallel".  When we propagate from the live_in of one
+ * block to the live out of the other, we have to kill any writes from phis
+ * and make live any sources.
+ *
+ * Returns true if updating live out of pred added anything
+ */
+static bool
+propagate_across_edge(nir_block *pred, nir_block *succ,
+                      struct live_ssa_defs_state *state)
+{
+   NIR_VLA(BITSET_WORD, live, state->bitset_words);
+   memcpy(live, succ->live_in, state->bitset_words * sizeof *live);
+
+   nir_foreach_instr(succ, instr) {
+      if (instr->type != nir_instr_type_phi)
+         break;
+      nir_phi_instr *phi = nir_instr_as_phi(instr);
+
+      assert(phi->dest.is_ssa);
+      set_ssa_def_dead(&phi->dest.ssa, live);
+   }
+
+   nir_foreach_instr(succ, instr) {
+      if (instr->type != nir_instr_type_phi)
+         break;
+      nir_phi_instr *phi = nir_instr_as_phi(instr);
+
+      nir_foreach_phi_src(phi, src) {
+         if (src->pred == pred) {
+            set_src_live(&src->src, live);
+            break;
+         }
+      }
+   }
+
+   BITSET_WORD progress = 0;
+   for (unsigned i = 0; i < state->bitset_words; ++i) {
+      progress |= live[i] & ~pred->live_out[i];
+      pred->live_out[i] |= live[i];
+   }
+   return progress != 0;
+}
+
+void
+nir_live_ssa_defs_impl(nir_function_impl *impl)
+{
+   struct live_ssa_defs_state state;
+
+   /* We start at 1 because we reserve the index value of 0 for ssa_undef
+    * instructions.  Those are never live, so their liveness information
+    * can be compacted into a single bit.
+    */
+   state.num_ssa_defs = 1;
+   nir_foreach_block(impl, index_ssa_definitions_block, &state);
+
+   nir_block_worklist_init(&state.worklist, impl->num_blocks, NULL);
+
+   /* We now know how many unique ssa definitions we have and we can go
+    * ahead and allocate live_in and live_out sets and add all of the
+    * blocks to the worklist.
+    */
+   state.bitset_words = BITSET_WORDS(state.num_ssa_defs);
+   nir_foreach_block(impl, init_liveness_block, &state);
+
+   /* We're now ready to work through the worklist and update the liveness
+    * sets of each of the blocks.  By the time we get to this point, every
+    * block in the function implementation has been pushed onto the
+    * worklist in reverse order.  As long as we keep the worklist
+    * up-to-date as we go, everything will get covered.
+    */
+   while (!nir_block_worklist_is_empty(&state.worklist)) {
+      /* We pop them off in the reverse order we pushed them on.  This way
+       * the first walk of the instructions is backwards so we only walk
+       * once in the case of no control flow.
+       */
+      nir_block *block = nir_block_worklist_pop_head(&state.worklist);
+
+      memcpy(block->live_in, block->live_out,
+             state.bitset_words * sizeof(BITSET_WORD));
+
+      nir_if *following_if = nir_block_get_following_if(block);
+      if (following_if)
+         set_src_live(&following_if->condition, block->live_in);
+
+      nir_foreach_instr_reverse(block, instr) {
+         /* Phi nodes are handled seperately so we want to skip them.  Since
+          * we are going backwards and they are at the beginning, we can just
+          * break as soon as we see one.
+          */
+         if (instr->type == nir_instr_type_phi)
+            break;
+
+         nir_foreach_ssa_def(instr, set_ssa_def_dead, block->live_in);
+         nir_foreach_src(instr, set_src_live, block->live_in);
+      }
+
+      /* Walk over all of the predecessors of the current block updating
+       * their live in with the live out of this one.  If anything has
+       * changed, add the predecessor to the work list so that we ensure
+       * that the new information is used.
+       */
+      struct set_entry *entry;
+      set_foreach(block->predecessors, entry) {
+         nir_block *pred = (nir_block *)entry->key;
+         if (propagate_across_edge(pred, block, &state))
+            nir_block_worklist_push_tail(&state.worklist, pred);
+      }
+   }
+
+   nir_block_worklist_fini(&state.worklist);
+}
+
+static bool
+src_does_not_use_def(nir_src *src, void *def)
+{
+   return !src->is_ssa || src->ssa != (nir_ssa_def *)def;
+}
+
+static bool
+search_for_use_after_instr(nir_instr *start, nir_ssa_def *def)
+{
+   /* Only look for a use strictly after the given instruction */
+   struct exec_node *node = start->node.next;
+   while (!exec_node_is_tail_sentinel(node)) {
+      nir_instr *instr = exec_node_data(nir_instr, node, node);
+      if (!nir_foreach_src(instr, src_does_not_use_def, def))
+         return true;
+      node = node->next;
+   }
+   return false;
+}
+
+/* Returns true if def is live at instr assuming that def comes before
+ * instr in a pre DFS search of the dominance tree.
+ */
+static bool
+nir_ssa_def_is_live_at(nir_ssa_def *def, nir_instr *instr)
+{
+   if (BITSET_TEST(instr->block->live_out, def->live_index)) {
+      /* Since def dominates instr, if def is in the liveout of the block,
+       * it's live at instr
+       */
+      return true;
+   } else {
+      if (BITSET_TEST(instr->block->live_in, def->live_index) ||
+          def->parent_instr->block == instr->block) {
+         /* In this case it is either live coming into instr's block or it
+          * is defined in the same block.  In this case, we simply need to
+          * see if it is used after instr.
+          */
+         return search_for_use_after_instr(instr, def);
+      } else {
+         return false;
+      }
+   }
+}
+
+bool
+nir_ssa_defs_interfere(nir_ssa_def *a, nir_ssa_def *b)
+{
+   if (a->parent_instr == b->parent_instr) {
+      /* Two variables defined at the same time interfere assuming at
+       * least one isn't dead.
+       */
+      return true;
+   } else if (a->live_index == 0 || b->live_index == 0) {
+      /* If either variable is an ssa_undef, then there's no interference */
+      return false;
+   } else if (a->live_index < b->live_index) {
+      return nir_ssa_def_is_live_at(a, b->parent_instr);
+   } else {
+      return nir_ssa_def_is_live_at(b, a->parent_instr);
+   }
+}
diff --git a/src/compiler/nir/nir_lower_alu_to_scalar.c b/src/compiler/nir/nir_lower_alu_to_scalar.c
new file mode 100644
index 00000000000..37cb0221e0b
--- /dev/null
+++ b/src/compiler/nir/nir_lower_alu_to_scalar.c
@@ -0,0 +1,264 @@
+/*
+ * Copyright © 2014-2015 Broadcom
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+
+/** @file nir_lower_alu_to_scalar.c
+ *
+ * Replaces nir_alu_instr operations with more than one channel used in the
+ * arguments with individual per-channel operations.
+ */
+
+static void
+nir_alu_ssa_dest_init(nir_alu_instr *instr, unsigned num_components)
+{
+   nir_ssa_dest_init(&instr->instr, &instr->dest.dest, num_components, NULL);
+   instr->dest.write_mask = (1 << num_components) - 1;
+}
+
+static void
+lower_reduction(nir_alu_instr *instr, nir_op chan_op, nir_op merge_op,
+                nir_builder *builder)
+{
+   unsigned num_components = nir_op_infos[instr->op].input_sizes[0];
+
+   nir_ssa_def *last = NULL;
+   for (unsigned i = 0; i < num_components; i++) {
+      nir_alu_instr *chan = nir_alu_instr_create(builder->shader, chan_op);
+      nir_alu_ssa_dest_init(chan, 1);
+      nir_alu_src_copy(&chan->src[0], &instr->src[0], chan);
+      chan->src[0].swizzle[0] = chan->src[0].swizzle[i];
+      if (nir_op_infos[chan_op].num_inputs > 1) {
+         assert(nir_op_infos[chan_op].num_inputs == 2);
+         nir_alu_src_copy(&chan->src[1], &instr->src[1], chan);
+         chan->src[1].swizzle[0] = chan->src[1].swizzle[i];
+      }
+
+      nir_builder_instr_insert(builder, &chan->instr);
+
+      if (i == 0) {
+         last = &chan->dest.dest.ssa;
+      } else {
+         last = nir_build_alu(builder, merge_op,
+                              last, &chan->dest.dest.ssa, NULL, NULL);
+      }
+   }
+
+   assert(instr->dest.write_mask == 1);
+   nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa, nir_src_for_ssa(last));
+   nir_instr_remove(&instr->instr);
+}
+
+static void
+lower_alu_instr_scalar(nir_alu_instr *instr, nir_builder *b)
+{
+   unsigned num_src = nir_op_infos[instr->op].num_inputs;
+   unsigned i, chan;
+
+   assert(instr->dest.dest.is_ssa);
+   assert(instr->dest.write_mask != 0);
+
+   b->cursor = nir_before_instr(&instr->instr);
+
+#define LOWER_REDUCTION(name, chan, merge) \
+   case name##2: \
+   case name##3: \
+   case name##4: \
+      lower_reduction(instr, chan, merge, b); \
+      return;
+
+   switch (instr->op) {
+   case nir_op_vec4:
+   case nir_op_vec3:
+   case nir_op_vec2:
+      /* We don't need to scalarize these ops, they're the ones generated to
+       * group up outputs into a value that can be SSAed.
+       */
+      return;
+
+   case nir_op_pack_half_2x16:
+      if (!b->shader->options->lower_pack_half_2x16)
+         return;
+
+      nir_ssa_def *val =
+         nir_pack_half_2x16_split(b, nir_channel(b, instr->src[0].src.ssa,
+                                                 instr->src[0].swizzle[0]),
+                                     nir_channel(b, instr->src[0].src.ssa,
+                                                 instr->src[0].swizzle[1]));
+
+      nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa, nir_src_for_ssa(val));
+      nir_instr_remove(&instr->instr);
+      return;
+
+   case nir_op_unpack_unorm_4x8:
+   case nir_op_unpack_snorm_4x8:
+   case nir_op_unpack_unorm_2x16:
+   case nir_op_unpack_snorm_2x16:
+      /* There is no scalar version of these ops, unless we were to break it
+       * down to bitshifts and math (which is definitely not intended).
+       */
+      return;
+
+   case nir_op_unpack_half_2x16: {
+      if (!b->shader->options->lower_unpack_half_2x16)
+         return;
+
+      nir_ssa_def *comps[2];
+      comps[0] = nir_unpack_half_2x16_split_x(b, instr->src[0].src.ssa);
+      comps[1] = nir_unpack_half_2x16_split_y(b, instr->src[0].src.ssa);
+      nir_ssa_def *vec = nir_vec(b, comps, 2);
+
+      nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa, nir_src_for_ssa(vec));
+      nir_instr_remove(&instr->instr);
+      return;
+   }
+
+   case nir_op_pack_uvec2_to_uint: {
+      assert(b->shader->options->lower_pack_snorm_2x16 ||
+             b->shader->options->lower_pack_unorm_2x16);
+
+      nir_ssa_def *word =
+         nir_extract_uword(b, instr->src[0].src.ssa, nir_imm_int(b, 0));
+      nir_ssa_def *val =
+         nir_ior(b, nir_ishl(b, nir_channel(b, word, 1), nir_imm_int(b, 16)),
+                                nir_channel(b, word, 0));
+
+      nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa, nir_src_for_ssa(val));
+      nir_instr_remove(&instr->instr);
+      break;
+   }
+
+   case nir_op_pack_uvec4_to_uint: {
+      assert(b->shader->options->lower_pack_snorm_4x8 ||
+             b->shader->options->lower_pack_unorm_4x8);
+
+      nir_ssa_def *byte =
+         nir_extract_ubyte(b, instr->src[0].src.ssa, nir_imm_int(b, 0));
+      nir_ssa_def *val =
+         nir_ior(b, nir_ior(b, nir_ishl(b, nir_channel(b, byte, 3), nir_imm_int(b, 24)),
+                               nir_ishl(b, nir_channel(b, byte, 2), nir_imm_int(b, 16))),
+                    nir_ior(b, nir_ishl(b, nir_channel(b, byte, 1), nir_imm_int(b, 8)),
+                               nir_channel(b, byte, 0)));
+
+      nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa, nir_src_for_ssa(val));
+      nir_instr_remove(&instr->instr);
+      break;
+   }
+
+   case nir_op_fdph: {
+      nir_ssa_def *sum[4];
+      for (unsigned i = 0; i < 3; i++) {
+         sum[i] = nir_fmul(b, nir_channel(b, instr->src[0].src.ssa,
+                                          instr->src[0].swizzle[i]),
+                              nir_channel(b, instr->src[1].src.ssa,
+                                          instr->src[1].swizzle[i]));
+      }
+      sum[3] = nir_channel(b, instr->src[1].src.ssa, instr->src[1].swizzle[3]);
+
+      nir_ssa_def *val = nir_fadd(b, nir_fadd(b, sum[0], sum[1]),
+                                     nir_fadd(b, sum[2], sum[3]));
+
+      nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa, nir_src_for_ssa(val));
+      nir_instr_remove(&instr->instr);
+      return;
+   }
+
+      LOWER_REDUCTION(nir_op_fdot, nir_op_fmul, nir_op_fadd);
+      LOWER_REDUCTION(nir_op_ball_fequal, nir_op_feq, nir_op_iand);
+      LOWER_REDUCTION(nir_op_ball_iequal, nir_op_ieq, nir_op_iand);
+      LOWER_REDUCTION(nir_op_bany_fnequal, nir_op_fne, nir_op_ior);
+      LOWER_REDUCTION(nir_op_bany_inequal, nir_op_ine, nir_op_ior);
+      LOWER_REDUCTION(nir_op_fall_equal, nir_op_seq, nir_op_fand);
+      LOWER_REDUCTION(nir_op_fany_nequal, nir_op_sne, nir_op_for);
+
+   default:
+      break;
+   }
+
+   if (instr->dest.dest.ssa.num_components == 1)
+      return;
+
+   unsigned num_components = instr->dest.dest.ssa.num_components;
+   nir_ssa_def *comps[] = { NULL, NULL, NULL, NULL };
+
+   for (chan = 0; chan < 4; chan++) {
+      if (!(instr->dest.write_mask & (1 << chan)))
+         continue;
+
+      nir_alu_instr *lower = nir_alu_instr_create(b->shader, instr->op);
+      for (i = 0; i < num_src; i++) {
+         /* We only handle same-size-as-dest (input_sizes[] == 0) or scalar
+          * args (input_sizes[] == 1).
+          */
+         assert(nir_op_infos[instr->op].input_sizes[i] < 2);
+         unsigned src_chan = (nir_op_infos[instr->op].input_sizes[i] == 1 ?
+                              0 : chan);
+
+         nir_alu_src_copy(&lower->src[i], &instr->src[i], lower);
+         for (int j = 0; j < 4; j++)
+            lower->src[i].swizzle[j] = instr->src[i].swizzle[src_chan];
+      }
+
+      nir_alu_ssa_dest_init(lower, 1);
+      lower->dest.saturate = instr->dest.saturate;
+      comps[chan] = &lower->dest.dest.ssa;
+
+      nir_builder_instr_insert(b, &lower->instr);
+   }
+
+   nir_ssa_def *vec = nir_vec(b, comps, num_components);
+
+   nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa, nir_src_for_ssa(vec));
+
+   nir_instr_remove(&instr->instr);
+}
+
+static bool
+lower_alu_to_scalar_block(nir_block *block, void *builder)
+{
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type == nir_instr_type_alu)
+         lower_alu_instr_scalar(nir_instr_as_alu(instr), builder);
+   }
+
+   return true;
+}
+
+static void
+nir_lower_alu_to_scalar_impl(nir_function_impl *impl)
+{
+   nir_builder builder;
+   nir_builder_init(&builder, impl);
+
+   nir_foreach_block(impl, lower_alu_to_scalar_block, &builder);
+}
+
+void
+nir_lower_alu_to_scalar(nir_shader *shader)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         nir_lower_alu_to_scalar_impl(function->impl);
+   }
+}
diff --git a/src/compiler/nir/nir_lower_atomics.c b/src/compiler/nir/nir_lower_atomics.c
new file mode 100644
index 00000000000..b07e199d71b
--- /dev/null
+++ b/src/compiler/nir/nir_lower_atomics.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "compiler/glsl/ir_uniform.h"
+#include "nir.h"
+#include "main/config.h"
+#include <assert.h>
+
+typedef struct {
+   const struct gl_shader_program *shader_program;
+   nir_shader   *shader;
+} lower_atomic_state;
+
+/*
+ * replace atomic counter intrinsics that use a variable with intrinsics
+ * that directly store the buffer index and byte offset
+ */
+
+static void
+lower_instr(nir_intrinsic_instr *instr,
+            lower_atomic_state *state)
+{
+   nir_intrinsic_op op;
+   switch (instr->intrinsic) {
+   case nir_intrinsic_atomic_counter_read_var:
+      op = nir_intrinsic_atomic_counter_read;
+      break;
+
+   case nir_intrinsic_atomic_counter_inc_var:
+      op = nir_intrinsic_atomic_counter_inc;
+      break;
+
+   case nir_intrinsic_atomic_counter_dec_var:
+      op = nir_intrinsic_atomic_counter_dec;
+      break;
+
+   default:
+      return;
+   }
+
+   if (instr->variables[0]->var->data.mode != nir_var_uniform &&
+       instr->variables[0]->var->data.mode != nir_var_shader_storage &&
+       instr->variables[0]->var->data.mode != nir_var_shared)
+      return; /* atomics passed as function arguments can't be lowered */
+
+   void *mem_ctx = ralloc_parent(instr);
+   unsigned uniform_loc = instr->variables[0]->var->data.location;
+
+   nir_intrinsic_instr *new_instr = nir_intrinsic_instr_create(mem_ctx, op);
+   new_instr->const_index[0] =
+      state->shader_program->UniformStorage[uniform_loc].opaque[state->shader->stage].index;
+
+   nir_load_const_instr *offset_const = nir_load_const_instr_create(mem_ctx, 1);
+   offset_const->value.u[0] = instr->variables[0]->var->data.offset;
+
+   nir_instr_insert_before(&instr->instr, &offset_const->instr);
+
+   nir_ssa_def *offset_def = &offset_const->def;
+
+   nir_deref *tail = &instr->variables[0]->deref;
+   while (tail->child != NULL) {
+      assert(tail->child->deref_type == nir_deref_type_array);
+      nir_deref_array *deref_array = nir_deref_as_array(tail->child);
+      tail = tail->child;
+
+      unsigned child_array_elements = tail->child != NULL ?
+         glsl_get_aoa_size(tail->type) : 1;
+
+      offset_const->value.u[0] += deref_array->base_offset *
+         child_array_elements * ATOMIC_COUNTER_SIZE;
+
+      if (deref_array->deref_array_type == nir_deref_array_type_indirect) {
+         nir_load_const_instr *atomic_counter_size =
+               nir_load_const_instr_create(mem_ctx, 1);
+         atomic_counter_size->value.u[0] = child_array_elements * ATOMIC_COUNTER_SIZE;
+         nir_instr_insert_before(&instr->instr, &atomic_counter_size->instr);
+
+         nir_alu_instr *mul = nir_alu_instr_create(mem_ctx, nir_op_imul);
+         nir_ssa_dest_init(&mul->instr, &mul->dest.dest, 1, NULL);
+         mul->dest.write_mask = 0x1;
+         nir_src_copy(&mul->src[0].src, &deref_array->indirect, mul);
+         mul->src[1].src.is_ssa = true;
+         mul->src[1].src.ssa = &atomic_counter_size->def;
+         nir_instr_insert_before(&instr->instr, &mul->instr);
+
+         nir_alu_instr *add = nir_alu_instr_create(mem_ctx, nir_op_iadd);
+         nir_ssa_dest_init(&add->instr, &add->dest.dest, 1, NULL);
+         add->dest.write_mask = 0x1;
+         add->src[0].src.is_ssa = true;
+         add->src[0].src.ssa = &mul->dest.dest.ssa;
+         add->src[1].src.is_ssa = true;
+         add->src[1].src.ssa = offset_def;
+         nir_instr_insert_before(&instr->instr, &add->instr);
+
+         offset_def = &add->dest.dest.ssa;
+      }
+   }
+
+   new_instr->src[0].is_ssa = true;
+   new_instr->src[0].ssa = offset_def;
+
+   if (instr->dest.is_ssa) {
+      nir_ssa_dest_init(&new_instr->instr, &new_instr->dest,
+                        instr->dest.ssa.num_components, NULL);
+      nir_ssa_def_rewrite_uses(&instr->dest.ssa,
+                               nir_src_for_ssa(&new_instr->dest.ssa));
+   } else {
+      nir_dest_copy(&new_instr->dest, &instr->dest, mem_ctx);
+   }
+
+   nir_instr_insert_before(&instr->instr, &new_instr->instr);
+   nir_instr_remove(&instr->instr);
+}
+
+static bool
+lower_block(nir_block *block, void *state)
+{
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type == nir_instr_type_intrinsic)
+         lower_instr(nir_instr_as_intrinsic(instr),
+                     (lower_atomic_state *) state);
+   }
+
+   return true;
+}
+
+void
+nir_lower_atomics(nir_shader *shader,
+                  const struct gl_shader_program *shader_program)
+{
+   lower_atomic_state state = {
+      .shader = shader,
+      .shader_program = shader_program,
+   };
+
+   nir_foreach_function(shader, function) {
+      if (function->impl) {
+         nir_foreach_block(function->impl, lower_block, (void *) &state);
+         nir_metadata_preserve(function->impl, nir_metadata_block_index |
+                                               nir_metadata_dominance);
+      }
+   }
+}
diff --git a/src/compiler/nir/nir_lower_clip.c b/src/compiler/nir/nir_lower_clip.c
new file mode 100644
index 00000000000..0ca6a289396
--- /dev/null
+++ b/src/compiler/nir/nir_lower_clip.c
@@ -0,0 +1,339 @@
+/*
+ * Copyright © 2015 Red Hat
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Rob Clark <[email protected]>
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+
+#define MAX_CLIP_PLANES 8
+
+/* Generates the lowering code for user-clip-planes, generating CLIPDIST
+ * from UCP[n] + CLIPVERTEX or POSITION.  Additionally, an optional pass
+ * for fragment shaders to insert conditional kill's based on the inter-
+ * polated CLIPDIST
+ *
+ * NOTE: should be run after nir_lower_outputs_to_temporaries() (or at
+ * least in scenarios where you can count on each output written once
+ * and only once).
+ */
+
+
+static nir_variable *
+create_clipdist_var(nir_shader *shader, unsigned drvloc,
+                    bool output, gl_varying_slot slot)
+{
+   nir_variable *var = rzalloc(shader, nir_variable);
+
+   var->data.driver_location = drvloc;
+   var->type = glsl_vec4_type();
+   var->data.mode = output ? nir_var_shader_out : nir_var_shader_in;
+   var->name = ralloc_asprintf(var, "clipdist_%d", drvloc);
+   var->data.index = 0;
+   var->data.location = slot;
+
+   if (output) {
+      exec_list_push_tail(&shader->outputs, &var->node);
+      shader->num_outputs++; /* TODO use type_size() */
+   }
+   else {
+      exec_list_push_tail(&shader->inputs, &var->node);
+      shader->num_inputs++;  /* TODO use type_size() */
+   }
+   return var;
+}
+
+static void
+store_clipdist_output(nir_builder *b, nir_variable *out, nir_ssa_def **val)
+{
+   nir_intrinsic_instr *store;
+
+   store = nir_intrinsic_instr_create(b->shader, nir_intrinsic_store_output);
+   store->num_components = 4;
+   store->const_index[0] = out->data.driver_location;
+   store->const_index[1] = 0xf;   /* wrmask */
+   store->src[0].ssa = nir_vec4(b, val[0], val[1], val[2], val[3]);
+   store->src[0].is_ssa = true;
+   store->src[1] = nir_src_for_ssa(nir_imm_int(b, 0));
+   nir_builder_instr_insert(b, &store->instr);
+}
+
+static void
+load_clipdist_input(nir_builder *b, nir_variable *in, nir_ssa_def **val)
+{
+   nir_intrinsic_instr *load;
+
+   load = nir_intrinsic_instr_create(b->shader, nir_intrinsic_load_input);
+   load->num_components = 4;
+   load->const_index[0] = in->data.driver_location;
+   load->src[0] = nir_src_for_ssa(nir_imm_int(b, 0));
+   nir_ssa_dest_init(&load->instr, &load->dest, 4, NULL);
+   nir_builder_instr_insert(b, &load->instr);
+
+   val[0] = nir_channel(b, &load->dest.ssa, 0);
+   val[1] = nir_channel(b, &load->dest.ssa, 1);
+   val[2] = nir_channel(b, &load->dest.ssa, 2);
+   val[3] = nir_channel(b, &load->dest.ssa, 3);
+}
+
+struct find_output_state
+{
+   unsigned drvloc;
+   nir_ssa_def *def;
+};
+
+static bool
+find_output_in_block(nir_block *block, void *void_state)
+{
+   struct find_output_state *state = void_state;
+   nir_foreach_instr(block, instr) {
+
+      if (instr->type == nir_instr_type_intrinsic) {
+         nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
+         if ((intr->intrinsic == nir_intrinsic_store_output) &&
+             intr->const_index[0] == state->drvloc) {
+            assert(state->def == NULL);
+            assert(intr->src[0].is_ssa);
+            assert(nir_src_as_const_value(intr->src[1]));
+            state->def = intr->src[0].ssa;
+
+#if !defined(DEBUG)
+            /* for debug builds, scan entire shader to assert
+             * if output is written multiple times.  For release
+             * builds just assume all is well and bail when we
+             * find first:
+             */
+            return false;
+#endif
+         }
+      }
+   }
+
+   return true;
+}
+
+/* TODO: maybe this would be a useful helper?
+ * NOTE: assumes each output is written exactly once (and unconditionally)
+ * so if needed nir_lower_outputs_to_temporaries()
+ */
+static nir_ssa_def *
+find_output(nir_shader *shader, unsigned drvloc)
+{
+   struct find_output_state state = {
+      .drvloc = drvloc,
+   };
+
+   nir_foreach_function(shader, function) {
+      if (function->impl) {
+         nir_foreach_block_reverse(function->impl,
+                                   find_output_in_block, &state);
+      }
+   }
+
+   return state.def;
+}
+
+/*
+ * VS lowering
+ */
+
+static void
+lower_clip_vs(nir_function_impl *impl, unsigned ucp_enables,
+              nir_ssa_def *cv, nir_variable **out)
+{
+   nir_ssa_def *clipdist[MAX_CLIP_PLANES];
+   nir_builder b;
+
+   nir_builder_init(&b, impl);
+
+   /* NIR should ensure that, even in case of loops/if-else, there
+    * should be only a single predecessor block to end_block, which
+    * makes the perfect place to insert the clipdist calculations.
+    *
+    * NOTE: in case of early return's, these would have to be lowered
+    * to jumps to end_block predecessor in a previous pass.  Not sure
+    * if there is a good way to sanity check this, but for now the
+    * users of this pass don't support sub-routines.
+    */
+   assert(impl->end_block->predecessors->entries == 1);
+   b.cursor = nir_after_cf_list(&impl->body);
+
+   for (int plane = 0; plane < MAX_CLIP_PLANES; plane++) {
+      if (ucp_enables & (1 << plane)) {
+         nir_ssa_def *ucp =
+            nir_load_system_value(&b, nir_intrinsic_load_user_clip_plane, plane);
+
+         /* calculate clipdist[plane] - dot(ucp, cv): */
+         clipdist[plane] = nir_fdot4(&b, ucp, cv);
+      }
+      else {
+         /* 0.0 == don't-clip == disabled: */
+         clipdist[plane] = nir_imm_float(&b, 0.0);
+      }
+   }
+
+   if (ucp_enables & 0x0f)
+      store_clipdist_output(&b, out[0], &clipdist[0]);
+   if (ucp_enables & 0xf0)
+      store_clipdist_output(&b, out[1], &clipdist[4]);
+
+   nir_metadata_preserve(impl, nir_metadata_dominance);
+}
+
+/* ucp_enables is bitmask of enabled ucp's.  Actual ucp values are
+ * passed in to shader via user_clip_plane system-values
+ */
+void
+nir_lower_clip_vs(nir_shader *shader, unsigned ucp_enables)
+{
+   int clipvertex = -1;
+   int position = -1;
+   int maxloc = -1;
+   nir_ssa_def *cv;
+   nir_variable *out[2] = { NULL };
+
+   if (!ucp_enables)
+      return;
+
+   /* find clipvertex/position outputs: */
+   nir_foreach_variable(var, &shader->outputs) {
+      int loc = var->data.driver_location;
+
+      /* keep track of last used driver-location.. we'll be
+       * appending CLIP_DIST0/CLIP_DIST1 after last existing
+       * output:
+       */
+      maxloc = MAX2(maxloc, loc);
+
+      switch (var->data.location) {
+      case VARYING_SLOT_POS:
+         position = loc;
+         break;
+      case VARYING_SLOT_CLIP_VERTEX:
+         clipvertex = loc;
+         break;
+      case VARYING_SLOT_CLIP_DIST0:
+      case VARYING_SLOT_CLIP_DIST1:
+         /* if shader is already writing CLIPDIST, then
+          * there should be no user-clip-planes to deal
+          * with.
+          */
+         return;
+      }
+   }
+
+   if (clipvertex != -1)
+      cv = find_output(shader, clipvertex);
+   else if (position != -1)
+      cv = find_output(shader, position);
+   else
+      return;
+
+   /* insert CLIPDIST outputs: */
+   if (ucp_enables & 0x0f)
+      out[0] =
+         create_clipdist_var(shader, ++maxloc, true, VARYING_SLOT_CLIP_DIST0);
+   if (ucp_enables & 0xf0)
+      out[1] =
+         create_clipdist_var(shader, ++maxloc, true, VARYING_SLOT_CLIP_DIST1);
+
+   nir_foreach_function(shader, function) {
+      if (!strcmp(function->name, "main"))
+         lower_clip_vs(function->impl, ucp_enables, cv, out);
+   }
+}
+
+/*
+ * FS lowering
+ */
+
+static void
+lower_clip_fs(nir_function_impl *impl, unsigned ucp_enables,
+              nir_variable **in)
+{
+   nir_ssa_def *clipdist[MAX_CLIP_PLANES];
+   nir_builder b;
+
+   nir_builder_init(&b, impl);
+   b.cursor = nir_before_cf_list(&impl->body);
+
+   if (ucp_enables & 0x0f)
+      load_clipdist_input(&b, in[0], &clipdist[0]);
+   if (ucp_enables & 0xf0)
+      load_clipdist_input(&b, in[1], &clipdist[4]);
+
+   for (int plane = 0; plane < MAX_CLIP_PLANES; plane++) {
+      if (ucp_enables & (1 << plane)) {
+         nir_intrinsic_instr *discard;
+         nir_ssa_def *cond;
+
+         cond = nir_flt(&b, clipdist[plane], nir_imm_float(&b, 0.0));
+
+         discard = nir_intrinsic_instr_create(b.shader,
+                                              nir_intrinsic_discard_if);
+         discard->src[0] = nir_src_for_ssa(cond);
+         nir_builder_instr_insert(&b, &discard->instr);
+      }
+   }
+}
+
+/* insert conditional kill based on interpolated CLIPDIST
+ */
+void
+nir_lower_clip_fs(nir_shader *shader, unsigned ucp_enables)
+{
+   nir_variable *in[2];
+   int maxloc = -1;
+
+   if (!ucp_enables)
+      return;
+
+   nir_foreach_variable(var, &shader->inputs) {
+      int loc = var->data.driver_location;
+
+      /* keep track of last used driver-location.. we'll be
+       * appending CLIP_DIST0/CLIP_DIST1 after last existing
+       * input:
+       */
+      maxloc = MAX2(maxloc, loc);
+   }
+
+   /* The shader won't normally have CLIPDIST inputs, so we
+    * must add our own:
+    */
+   /* insert CLIPDIST outputs: */
+   if (ucp_enables & 0x0f)
+      in[0] =
+         create_clipdist_var(shader, ++maxloc, false,
+                             VARYING_SLOT_CLIP_DIST0);
+   if (ucp_enables & 0xf0)
+      in[1] =
+         create_clipdist_var(shader, ++maxloc, false,
+                             VARYING_SLOT_CLIP_DIST1);
+
+   nir_foreach_function(shader, function) {
+      if (!strcmp(function->name, "main"))
+         lower_clip_fs(function->impl, ucp_enables, in);
+   }
+}
diff --git a/src/compiler/nir/nir_lower_global_vars_to_local.c b/src/compiler/nir/nir_lower_global_vars_to_local.c
new file mode 100644
index 00000000000..7b4cd4ee8dc
--- /dev/null
+++ b/src/compiler/nir/nir_lower_global_vars_to_local.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+/*
+ * This lowering pass detects when a global variable is only being used by
+ * one function and makes it local to that function
+ */
+
+#include "nir.h"
+
+struct global_to_local_state {
+   nir_function_impl *impl;
+   /* A hash table keyed on variable pointers that stores the unique
+    * nir_function_impl that uses the given variable.  If a variable is
+    * used in multiple functions, the data for the given key will be NULL.
+    */
+   struct hash_table *var_func_table;
+};
+
+static bool
+mark_global_var_uses_block(nir_block *block, void *void_state)
+{
+   struct global_to_local_state *state = void_state;
+
+   nir_foreach_instr(block, instr) {
+      if (instr->type != nir_instr_type_intrinsic)
+         continue;
+
+      nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+      unsigned num_vars = nir_intrinsic_infos[intrin->intrinsic].num_variables;
+
+      for (unsigned i = 0; i < num_vars; i++) {
+         nir_variable *var = intrin->variables[i]->var;
+         if (var->data.mode != nir_var_global)
+            continue;
+
+         struct hash_entry *entry =
+            _mesa_hash_table_search(state->var_func_table, var);
+
+         if (entry) {
+            if (entry->data != state->impl)
+               entry->data = NULL;
+         } else {
+            _mesa_hash_table_insert(state->var_func_table, var, state->impl);
+         }
+      }
+   }
+
+   return true;
+}
+
+bool
+nir_lower_global_vars_to_local(nir_shader *shader)
+{
+   struct global_to_local_state state;
+   bool progress = false;
+
+   state.var_func_table = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
+                                                  _mesa_key_pointer_equal);
+
+   nir_foreach_function(shader, function) {
+      if (function->impl) {
+         state.impl = function->impl;
+         nir_foreach_block(function->impl, mark_global_var_uses_block, &state);
+      }
+   }
+
+   struct hash_entry *entry;
+   hash_table_foreach(state.var_func_table, entry) {
+      nir_variable *var = (void *)entry->key;
+      nir_function_impl *impl = entry->data;
+
+      assert(var->data.mode == nir_var_global);
+
+      if (impl != NULL) {
+         exec_node_remove(&var->node);
+         var->data.mode = nir_var_local;
+         exec_list_push_tail(&impl->locals, &var->node);
+         nir_metadata_preserve(impl, nir_metadata_block_index |
+                                     nir_metadata_dominance |
+                                     nir_metadata_live_ssa_defs);
+         progress = true;
+      }
+   }
+
+   _mesa_hash_table_destroy(state.var_func_table, NULL);
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_lower_gs_intrinsics.c b/src/compiler/nir/nir_lower_gs_intrinsics.c
new file mode 100644
index 00000000000..fdff1656b4d
--- /dev/null
+++ b/src/compiler/nir/nir_lower_gs_intrinsics.c
@@ -0,0 +1,219 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+
+/**
+ * \file nir_lower_gs_intrinsics.c
+ *
+ * Geometry Shaders can call EmitVertex()/EmitStreamVertex() to output an
+ * arbitrary number of vertices.  However, the shader must declare the maximum
+ * number of vertices that it will ever output - further attempts to emit
+ * vertices result in undefined behavior according to the GLSL specification.
+ *
+ * Drivers might use this maximum number of vertices to allocate enough space
+ * to hold the geometry shader's output.  Some drivers (such as i965) need to
+ * implement "safety checks" which ensure that the shader hasn't emitted too
+ * many vertices, to avoid overflowing that space and trashing other memory.
+ *
+ * The count of emitted vertices can also be useful in buffer offset
+ * calculations, so drivers know where to write the GS output.
+ *
+ * However, for simple geometry shaders that emit a statically determinable
+ * number of vertices, this extra bookkeeping is unnecessary and inefficient.
+ * By tracking the vertex count in NIR, we allow constant folding/propagation
+ * and dead control flow optimizations to eliminate most of it where possible.
+ *
+ * This pass introduces a new global variable which stores the current vertex
+ * count (initialized to 0), and converts emit_vertex/end_primitive intrinsics
+ * to their *_with_counter variants.  emit_vertex is also wrapped in a safety
+ * check to avoid buffer overflows.  Finally, it adds a set_vertex_count
+ * intrinsic at the end of the program, informing the driver of the final
+ * vertex count.
+ */
+
+struct state {
+   nir_builder *builder;
+   nir_variable *vertex_count_var;
+   bool progress;
+};
+
+/**
+ * Replace emit_vertex intrinsics with:
+ *
+ * if (vertex_count < max_vertices) {
+ *    emit_vertex_with_counter vertex_count ...
+ *    vertex_count += 1
+ * }
+ */
+static void
+rewrite_emit_vertex(nir_intrinsic_instr *intrin, struct state *state)
+{
+   nir_builder *b = state->builder;
+
+   /* Load the vertex count */
+   b->cursor = nir_before_instr(&intrin->instr);
+   nir_ssa_def *count = nir_load_var(b, state->vertex_count_var);
+
+   nir_ssa_def *max_vertices = nir_imm_int(b, b->shader->info.gs.vertices_out);
+
+   /* Create: if (vertex_count < max_vertices) and insert it.
+    *
+    * The new if statement needs to be hooked up to the control flow graph
+    * before we start inserting instructions into it.
+    */
+   nir_if *if_stmt = nir_if_create(b->shader);
+   if_stmt->condition = nir_src_for_ssa(nir_ilt(b, count, max_vertices));
+   nir_builder_cf_insert(b, &if_stmt->cf_node);
+
+   /* Fill out the new then-block */
+   b->cursor = nir_after_cf_list(&if_stmt->then_list);
+
+   nir_intrinsic_instr *lowered =
+      nir_intrinsic_instr_create(b->shader,
+                                 nir_intrinsic_emit_vertex_with_counter);
+   lowered->const_index[0] = intrin->const_index[0];
+   lowered->src[0] = nir_src_for_ssa(count);
+   nir_builder_instr_insert(b, &lowered->instr);
+
+   /* Increment the vertex count by 1 */
+   nir_store_var(b, state->vertex_count_var,
+                 nir_iadd(b, count, nir_imm_int(b, 1)),
+                 0x1); /* .x */
+
+   nir_instr_remove(&intrin->instr);
+
+   state->progress = true;
+}
+
+/**
+ * Replace end_primitive with end_primitive_with_counter.
+ */
+static void
+rewrite_end_primitive(nir_intrinsic_instr *intrin, struct state *state)
+{
+   nir_builder *b = state->builder;
+
+   b->cursor = nir_before_instr(&intrin->instr);
+   nir_ssa_def *count = nir_load_var(b, state->vertex_count_var);
+
+   nir_intrinsic_instr *lowered =
+      nir_intrinsic_instr_create(b->shader,
+                                 nir_intrinsic_end_primitive_with_counter);
+   lowered->const_index[0] = intrin->const_index[0];
+   lowered->src[0] = nir_src_for_ssa(count);
+   nir_builder_instr_insert(b, &lowered->instr);
+
+   nir_instr_remove(&intrin->instr);
+
+   state->progress = true;
+}
+
+static bool
+rewrite_intrinsics(nir_block *block, void *closure)
+{
+   struct state *state = closure;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_intrinsic)
+         continue;
+
+      nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+      switch (intrin->intrinsic) {
+      case nir_intrinsic_emit_vertex:
+         rewrite_emit_vertex(intrin, state);
+         break;
+      case nir_intrinsic_end_primitive:
+         rewrite_end_primitive(intrin, state);
+         break;
+      default:
+         /* not interesting; skip this */
+         break;
+      }
+   }
+
+   return true;
+}
+
+/**
+ * Add a set_vertex_count intrinsic at the end of the program
+ * (representing the final vertex count).
+ */
+static void
+append_set_vertex_count(nir_block *end_block, struct state *state)
+{
+   nir_builder *b = state->builder;
+   nir_shader *shader = state->builder->shader;
+
+   /* Insert the new intrinsic in all of the predecessors of the end block,
+    * but before any jump instructions (return).
+    */
+   struct set_entry *entry;
+   set_foreach(end_block->predecessors, entry) {
+      nir_block *pred = (nir_block *) entry->key;
+      b->cursor = nir_after_block_before_jump(pred);
+
+      nir_ssa_def *count = nir_load_var(b, state->vertex_count_var);
+
+      nir_intrinsic_instr *set_vertex_count =
+         nir_intrinsic_instr_create(shader, nir_intrinsic_set_vertex_count);
+      set_vertex_count->src[0] = nir_src_for_ssa(count);
+
+      nir_builder_instr_insert(b, &set_vertex_count->instr);
+   }
+}
+
+bool
+nir_lower_gs_intrinsics(nir_shader *shader)
+{
+   struct state state;
+   state.progress = false;
+
+   /* Create the counter variable */
+   nir_variable *var = rzalloc(shader, nir_variable);
+   var->data.mode = nir_var_global;
+   var->type = glsl_uint_type();
+   var->name = "vertex_count";
+   var->constant_initializer = rzalloc(shader, nir_constant); /* initialize to 0 */
+
+   exec_list_push_tail(&shader->globals, &var->node);
+   state.vertex_count_var = var;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl) {
+         nir_builder b;
+         nir_builder_init(&b, function->impl);
+         state.builder = &b;
+
+         nir_foreach_block(function->impl, rewrite_intrinsics, &state);
+
+         /* This only works because we have a single main() function. */
+         append_set_vertex_count(function->impl->end_block, &state);
+
+         nir_metadata_preserve(function->impl, 0);
+      }
+   }
+
+   return state.progress;
+}
diff --git a/src/compiler/nir/nir_lower_idiv.c b/src/compiler/nir/nir_lower_idiv.c
new file mode 100644
index 00000000000..a084ad9c0e5
--- /dev/null
+++ b/src/compiler/nir/nir_lower_idiv.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright © 2015 Red Hat
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Rob Clark <[email protected]>
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+
+/* Lowers idiv/udiv/umod
+ * Based on NV50LegalizeSSA::handleDIV()
+ *
+ * Note that this is probably not enough precision for compute shaders.
+ * Perhaps we want a second higher precision (looping) version of this?
+ * Or perhaps we assume if you can do compute shaders you can also
+ * branch out to a pre-optimized shader library routine..
+ */
+
+static void
+convert_instr(nir_builder *bld, nir_alu_instr *alu)
+{
+   nir_ssa_def *numer, *denom, *af, *bf, *a, *b, *q, *r;
+   nir_op op = alu->op;
+   bool is_signed;
+
+   if ((op != nir_op_idiv) &&
+       (op != nir_op_udiv) &&
+       (op != nir_op_umod))
+      return;
+
+   is_signed = (op == nir_op_idiv);
+
+   bld->cursor = nir_before_instr(&alu->instr);
+
+   numer = nir_ssa_for_alu_src(bld, alu, 0);
+   denom = nir_ssa_for_alu_src(bld, alu, 1);
+
+   if (is_signed) {
+      af = nir_i2f(bld, numer);
+      bf = nir_i2f(bld, denom);
+      af = nir_fabs(bld, af);
+      bf = nir_fabs(bld, bf);
+      a  = nir_iabs(bld, numer);
+      b  = nir_iabs(bld, denom);
+   } else {
+      af = nir_u2f(bld, numer);
+      bf = nir_u2f(bld, denom);
+      a  = numer;
+      b  = denom;
+   }
+
+   /* get first result: */
+   bf = nir_frcp(bld, bf);
+   bf = nir_isub(bld, bf, nir_imm_int(bld, 2));  /* yes, really */
+   q  = nir_fmul(bld, af, bf);
+
+   if (is_signed) {
+      q = nir_f2i(bld, q);
+   } else {
+      q = nir_f2u(bld, q);
+   }
+
+   /* get error of first result: */
+   r = nir_imul(bld, q, b);
+   r = nir_isub(bld, a, r);
+   r = nir_u2f(bld, r);
+   r = nir_fmul(bld, r, bf);
+   r = nir_f2u(bld, r);
+
+   /* add quotients: */
+   q = nir_iadd(bld, q, r);
+
+   /* correction: if modulus >= divisor, add 1 */
+   r = nir_imul(bld, q, b);
+   r = nir_isub(bld, a, r);
+
+   r = nir_uge(bld, r, b);
+   r = nir_b2i(bld, r);
+
+   q = nir_iadd(bld, q, r);
+   if (is_signed)  {
+      /* fix the sign: */
+      r = nir_ixor(bld, numer, denom);
+      r = nir_ushr(bld, r, nir_imm_int(bld, 31));
+      r = nir_i2b(bld, r);
+      b = nir_ineg(bld, q);
+      q = nir_bcsel(bld, r, b, q);
+   }
+
+   if (op == nir_op_umod) {
+      /* division result in q */
+      r = nir_imul(bld, q, b);
+      q = nir_isub(bld, a, r);
+   }
+
+   assert(alu->dest.dest.is_ssa);
+   nir_ssa_def_rewrite_uses(&alu->dest.dest.ssa, nir_src_for_ssa(q));
+}
+
+static bool
+convert_block(nir_block *block, void *state)
+{
+   nir_builder *b = state;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type == nir_instr_type_alu)
+         convert_instr(b, nir_instr_as_alu(instr));
+   }
+
+   return true;
+}
+
+static void
+convert_impl(nir_function_impl *impl)
+{
+   nir_builder b;
+   nir_builder_init(&b, impl);
+
+   nir_foreach_block(impl, convert_block, &b);
+   nir_metadata_preserve(impl, nir_metadata_block_index |
+                               nir_metadata_dominance);
+}
+
+void
+nir_lower_idiv(nir_shader *shader)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         convert_impl(function->impl);
+   }
+}
diff --git a/src/compiler/nir/nir_lower_indirect_derefs.c b/src/compiler/nir/nir_lower_indirect_derefs.c
new file mode 100644
index 00000000000..69f2df4ba6d
--- /dev/null
+++ b/src/compiler/nir/nir_lower_indirect_derefs.c
@@ -0,0 +1,239 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+
+static void
+emit_load_store(nir_builder *b, nir_intrinsic_instr *orig_instr,
+                nir_deref_var *deref, nir_deref *tail,
+                nir_ssa_def **dest, nir_ssa_def *src);
+
+static void
+emit_indirect_load_store(nir_builder *b, nir_intrinsic_instr *orig_instr,
+                         nir_deref_var *deref, nir_deref *arr_parent,
+                         int start, int end,
+                         nir_ssa_def **dest, nir_ssa_def *src)
+{
+   assert(arr_parent->child &&
+          arr_parent->child->deref_type == nir_deref_type_array);
+   nir_deref_array *arr = nir_deref_as_array(arr_parent->child);
+   assert(arr->deref_array_type == nir_deref_array_type_indirect);
+   assert(arr->indirect.is_ssa);
+
+   assert(start < end);
+   if (start == end - 1) {
+      /* Base case.  Just emit the load/store op */
+      nir_deref_array direct = *arr;
+      direct.deref_array_type = nir_deref_array_type_direct;
+      direct.base_offset += start;
+      direct.indirect = NIR_SRC_INIT;
+
+      arr_parent->child = &direct.deref;
+      emit_load_store(b, orig_instr, deref, &arr->deref, dest, src);
+      arr_parent->child = &arr->deref;
+   } else {
+      int mid = start + (end - start) / 2;
+
+      nir_ssa_def *then_dest, *else_dest;
+
+      nir_if *if_stmt = nir_if_create(b->shader);
+      if_stmt->condition = nir_src_for_ssa(nir_ilt(b, arr->indirect.ssa,
+                                                      nir_imm_int(b, mid)));
+      nir_cf_node_insert(b->cursor, &if_stmt->cf_node);
+
+      b->cursor = nir_after_cf_list(&if_stmt->then_list);
+      emit_indirect_load_store(b, orig_instr, deref, arr_parent,
+                               start, mid, &then_dest, src);
+
+      b->cursor = nir_after_cf_list(&if_stmt->else_list);
+      emit_indirect_load_store(b, orig_instr, deref, arr_parent,
+                               mid, end, &else_dest, src);
+
+      b->cursor = nir_after_cf_node(&if_stmt->cf_node);
+
+      if (src == NULL) {
+         /* We're a load.  We need to insert a phi node */
+         nir_phi_instr *phi = nir_phi_instr_create(b->shader);
+         nir_ssa_dest_init(&phi->instr, &phi->dest,
+                           then_dest->num_components, NULL);
+
+         nir_phi_src *src0 = ralloc(phi, nir_phi_src);
+         src0->pred = nir_cf_node_as_block(nir_if_last_then_node(if_stmt));
+         src0->src = nir_src_for_ssa(then_dest);
+         exec_list_push_tail(&phi->srcs, &src0->node);
+
+         nir_phi_src *src1 = ralloc(phi, nir_phi_src);
+         src1->pred = nir_cf_node_as_block(nir_if_last_else_node(if_stmt));
+         src1->src = nir_src_for_ssa(else_dest);
+         exec_list_push_tail(&phi->srcs, &src1->node);
+
+         nir_builder_instr_insert(b, &phi->instr);
+         *dest = &phi->dest.ssa;
+      }
+   }
+}
+
+static void
+emit_load_store(nir_builder *b, nir_intrinsic_instr *orig_instr,
+                nir_deref_var *deref, nir_deref *tail,
+                nir_ssa_def **dest, nir_ssa_def *src)
+{
+   for (; tail->child; tail = tail->child) {
+      if (tail->child->deref_type != nir_deref_type_array)
+         continue;
+
+      nir_deref_array *arr = nir_deref_as_array(tail->child);
+      if (arr->deref_array_type != nir_deref_array_type_indirect)
+         continue;
+
+      int length = glsl_get_length(tail->type);
+
+      emit_indirect_load_store(b, orig_instr, deref, tail, -arr->base_offset,
+                               length - arr->base_offset, dest, src);
+      return;
+   }
+
+   assert(tail && tail->child == NULL);
+
+   /* We reached the end of the deref chain.  Emit the instruction */
+
+   if (src == NULL) {
+      /* This is a load instruction */
+      nir_intrinsic_instr *load =
+         nir_intrinsic_instr_create(b->shader, nir_intrinsic_load_var);
+      load->num_components = orig_instr->num_components;
+      load->variables[0] =
+         nir_deref_as_var(nir_copy_deref(load, &deref->deref));
+      nir_ssa_dest_init(&load->instr, &load->dest,
+                        load->num_components, NULL);
+      nir_builder_instr_insert(b, &load->instr);
+      *dest = &load->dest.ssa;
+   } else {
+      /* This is a store instruction */
+      nir_intrinsic_instr *store =
+         nir_intrinsic_instr_create(b->shader, nir_intrinsic_store_var);
+      store->num_components = orig_instr->num_components;
+      store->const_index[0] = orig_instr->const_index[0]; /* writemask */
+      store->variables[0] =
+         nir_deref_as_var(nir_copy_deref(store, &deref->deref));
+      store->src[0] = nir_src_for_ssa(src);
+      nir_builder_instr_insert(b, &store->instr);
+   }
+}
+
+static bool
+deref_has_indirect(nir_deref_var *deref)
+{
+   for (nir_deref *tail = deref->deref.child; tail; tail = tail->child) {
+      if (tail->deref_type != nir_deref_type_array)
+         continue;
+
+      nir_deref_array *arr = nir_deref_as_array(tail);
+      if (arr->deref_array_type == nir_deref_array_type_indirect)
+         return true;
+   }
+
+   return false;
+}
+
+struct lower_indirect_state {
+   nir_builder builder;
+   uint32_t mode_mask;
+   bool progress;
+};
+
+static bool
+lower_indirect_block(nir_block *block, void *void_state)
+{
+   struct lower_indirect_state *state = void_state;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_intrinsic)
+         continue;
+
+      nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+      if (intrin->intrinsic != nir_intrinsic_load_var &&
+          intrin->intrinsic != nir_intrinsic_store_var)
+         continue;
+
+      if (!deref_has_indirect(intrin->variables[0]))
+         continue;
+
+      /* Only lower variables whose mode is in the mask */
+      if (!(state->mode_mask & (1 << intrin->variables[0]->var->data.mode)))
+         continue;
+
+      state->builder.cursor = nir_before_instr(&intrin->instr);
+
+      if (intrin->intrinsic == nir_intrinsic_load_var) {
+         nir_ssa_def *result;
+         emit_load_store(&state->builder, intrin, intrin->variables[0],
+                         &intrin->variables[0]->deref, &result, NULL);
+         nir_ssa_def_rewrite_uses(&intrin->dest.ssa, nir_src_for_ssa(result));
+      } else {
+         assert(intrin->src[0].is_ssa);
+         emit_load_store(&state->builder, intrin, intrin->variables[0],
+                         &intrin->variables[0]->deref, NULL, intrin->src[0].ssa);
+      }
+      nir_instr_remove(&intrin->instr);
+      state->progress = true;
+   }
+
+   return true;
+}
+
+static bool
+lower_indirects_impl(nir_function_impl *impl, uint32_t mode_mask)
+{
+   struct lower_indirect_state state;
+
+   state.progress = false;
+   state.mode_mask = mode_mask;
+   nir_builder_init(&state.builder, impl);
+
+   nir_foreach_block(impl, lower_indirect_block, &state);
+
+   if (state.progress)
+      nir_metadata_preserve(impl, nir_metadata_none);
+
+   return state.progress;
+}
+
+/** Lowers indirect variable loads/stores to direct loads/stores.
+ *
+ * The pass works by replacing any indirect load or store with an if-ladder
+ * that does a binary search on the array index.
+ */
+bool
+nir_lower_indirect_derefs(nir_shader *shader, uint32_t mode_mask)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         progress = lower_indirects_impl(function->impl, mode_mask) || progress;
+   }
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_lower_io.c b/src/compiler/nir/nir_lower_io.c
new file mode 100644
index 00000000000..2c5fa16af5e
--- /dev/null
+++ b/src/compiler/nir/nir_lower_io.c
@@ -0,0 +1,461 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+/*
+ * This lowering pass converts references to input/output variables with
+ * loads/stores to actual input/output intrinsics.
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+
+struct lower_io_state {
+   nir_builder builder;
+   void *mem_ctx;
+   int (*type_size)(const struct glsl_type *type);
+   nir_variable_mode mode;
+};
+
+void
+nir_assign_var_locations(struct exec_list *var_list, unsigned *size,
+                         int (*type_size)(const struct glsl_type *))
+{
+   unsigned location = 0;
+
+   nir_foreach_variable(var, var_list) {
+      /*
+       * UBO's have their own address spaces, so don't count them towards the
+       * number of global uniforms
+       */
+      if ((var->data.mode == nir_var_uniform || var->data.mode == nir_var_shader_storage) &&
+          var->interface_type != NULL)
+         continue;
+
+      var->data.driver_location = location;
+      location += type_size(var->type);
+   }
+
+   *size = location;
+}
+
+/**
+ * Returns true if we're processing a stage whose inputs are arrays indexed
+ * by a vertex number (such as geometry shader inputs).
+ */
+static bool
+is_per_vertex_input(struct lower_io_state *state, nir_variable *var)
+{
+   gl_shader_stage stage = state->builder.shader->stage;
+
+   return var->data.mode == nir_var_shader_in && !var->data.patch &&
+          (stage == MESA_SHADER_TESS_CTRL ||
+           stage == MESA_SHADER_TESS_EVAL ||
+           stage == MESA_SHADER_GEOMETRY);
+}
+
+static bool
+is_per_vertex_output(struct lower_io_state *state, nir_variable *var)
+{
+   gl_shader_stage stage = state->builder.shader->stage;
+   return var->data.mode == nir_var_shader_out && !var->data.patch &&
+          stage == MESA_SHADER_TESS_CTRL;
+}
+
+static nir_ssa_def *
+get_io_offset(nir_builder *b, nir_deref_var *deref,
+              nir_ssa_def **vertex_index,
+              int (*type_size)(const struct glsl_type *))
+{
+   nir_deref *tail = &deref->deref;
+
+   /* For per-vertex input arrays (i.e. geometry shader inputs), keep the
+    * outermost array index separate.  Process the rest normally.
+    */
+   if (vertex_index != NULL) {
+      tail = tail->child;
+      assert(tail->deref_type == nir_deref_type_array);
+      nir_deref_array *deref_array = nir_deref_as_array(tail);
+
+      nir_ssa_def *vtx = nir_imm_int(b, deref_array->base_offset);
+      if (deref_array->deref_array_type == nir_deref_array_type_indirect) {
+         vtx = nir_iadd(b, vtx, nir_ssa_for_src(b, deref_array->indirect, 1));
+      }
+      *vertex_index = vtx;
+   }
+
+   /* Just emit code and let constant-folding go to town */
+   nir_ssa_def *offset = nir_imm_int(b, 0);
+
+   while (tail->child != NULL) {
+      const struct glsl_type *parent_type = tail->type;
+      tail = tail->child;
+
+      if (tail->deref_type == nir_deref_type_array) {
+         nir_deref_array *deref_array = nir_deref_as_array(tail);
+         unsigned size = type_size(tail->type);
+
+         offset = nir_iadd(b, offset,
+                           nir_imm_int(b, size * deref_array->base_offset));
+
+         if (deref_array->deref_array_type == nir_deref_array_type_indirect) {
+            nir_ssa_def *mul =
+               nir_imul(b, nir_imm_int(b, size),
+                        nir_ssa_for_src(b, deref_array->indirect, 1));
+
+            offset = nir_iadd(b, offset, mul);
+         }
+      } else if (tail->deref_type == nir_deref_type_struct) {
+         nir_deref_struct *deref_struct = nir_deref_as_struct(tail);
+
+         unsigned field_offset = 0;
+         for (unsigned i = 0; i < deref_struct->index; i++) {
+            field_offset += type_size(glsl_get_struct_field(parent_type, i));
+         }
+         offset = nir_iadd(b, offset, nir_imm_int(b, field_offset));
+      }
+   }
+
+   return offset;
+}
+
+static nir_intrinsic_op
+load_op(struct lower_io_state *state,
+        nir_variable_mode mode, bool per_vertex)
+{
+   nir_intrinsic_op op;
+   switch (mode) {
+   case nir_var_shader_in:
+      op = per_vertex ? nir_intrinsic_load_per_vertex_input :
+                        nir_intrinsic_load_input;
+      break;
+   case nir_var_shader_out:
+      op = per_vertex ? nir_intrinsic_load_per_vertex_output :
+                        nir_intrinsic_load_output;
+      break;
+   case nir_var_uniform:
+      op = nir_intrinsic_load_uniform;
+      break;
+   case nir_var_shared:
+      op = nir_intrinsic_load_shared;
+      break;
+   default:
+      unreachable("Unknown variable mode");
+   }
+   return op;
+}
+
+static nir_intrinsic_op
+store_op(struct lower_io_state *state,
+         nir_variable_mode mode, bool per_vertex)
+{
+   nir_intrinsic_op op;
+   switch (mode) {
+   case nir_var_shader_in:
+   case nir_var_shader_out:
+      op = per_vertex ? nir_intrinsic_store_per_vertex_output :
+                        nir_intrinsic_store_output;
+      break;
+   case nir_var_shared:
+      op = nir_intrinsic_store_shared;
+      break;
+   default:
+      unreachable("Unknown variable mode");
+   }
+   return op;
+}
+
+static nir_intrinsic_op
+atomic_op(nir_intrinsic_op opcode)
+{
+   switch (opcode) {
+#define OP(O) case nir_intrinsic_var_##O: return nir_intrinsic_shared_##O;
+   OP(atomic_exchange)
+   OP(atomic_comp_swap)
+   OP(atomic_add)
+   OP(atomic_imin)
+   OP(atomic_umin)
+   OP(atomic_imax)
+   OP(atomic_umax)
+   OP(atomic_and)
+   OP(atomic_or)
+   OP(atomic_xor)
+#undef OP
+   default:
+      unreachable("Invalid atomic");
+   }
+}
+
+static bool
+nir_lower_io_block(nir_block *block, void *void_state)
+{
+   struct lower_io_state *state = void_state;
+
+   nir_builder *b = &state->builder;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_intrinsic)
+         continue;
+
+      nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+
+      switch (intrin->intrinsic) {
+      case nir_intrinsic_load_var:
+      case nir_intrinsic_store_var:
+      case nir_intrinsic_var_atomic_add:
+      case nir_intrinsic_var_atomic_imin:
+      case nir_intrinsic_var_atomic_umin:
+      case nir_intrinsic_var_atomic_imax:
+      case nir_intrinsic_var_atomic_umax:
+      case nir_intrinsic_var_atomic_and:
+      case nir_intrinsic_var_atomic_or:
+      case nir_intrinsic_var_atomic_xor:
+      case nir_intrinsic_var_atomic_exchange:
+      case nir_intrinsic_var_atomic_comp_swap:
+         /* We can lower the io for this nir instrinsic */
+         break;
+      default:
+         /* We can't lower the io for this nir instrinsic, so skip it */
+         continue;
+      }
+
+      nir_variable_mode mode = intrin->variables[0]->var->data.mode;
+
+      if (state->mode != nir_var_all && state->mode != mode)
+         continue;
+
+      if (mode != nir_var_shader_in &&
+          mode != nir_var_shader_out &&
+          mode != nir_var_shared &&
+          mode != nir_var_uniform)
+         continue;
+
+      b->cursor = nir_before_instr(instr);
+
+      switch (intrin->intrinsic) {
+      case nir_intrinsic_load_var: {
+         bool per_vertex =
+            is_per_vertex_input(state, intrin->variables[0]->var) ||
+            is_per_vertex_output(state, intrin->variables[0]->var);
+
+         nir_ssa_def *offset;
+         nir_ssa_def *vertex_index;
+
+         offset = get_io_offset(b, intrin->variables[0],
+                                per_vertex ? &vertex_index : NULL,
+                                state->type_size);
+
+         nir_intrinsic_instr *load =
+            nir_intrinsic_instr_create(state->mem_ctx,
+                                       load_op(state, mode, per_vertex));
+         load->num_components = intrin->num_components;
+
+         load->const_index[0] =
+            intrin->variables[0]->var->data.driver_location;
+
+         if (load->intrinsic == nir_intrinsic_load_uniform) {
+            load->const_index[1] =
+               state->type_size(intrin->variables[0]->var->type);
+         }
+
+         if (per_vertex)
+            load->src[0] = nir_src_for_ssa(vertex_index);
+
+         load->src[per_vertex ? 1 : 0] = nir_src_for_ssa(offset);
+
+         if (intrin->dest.is_ssa) {
+            nir_ssa_dest_init(&load->instr, &load->dest,
+                              intrin->num_components, NULL);
+            nir_ssa_def_rewrite_uses(&intrin->dest.ssa,
+                                     nir_src_for_ssa(&load->dest.ssa));
+         } else {
+            nir_dest_copy(&load->dest, &intrin->dest, state->mem_ctx);
+         }
+
+         nir_instr_insert_before(&intrin->instr, &load->instr);
+         nir_instr_remove(&intrin->instr);
+         break;
+      }
+
+      case nir_intrinsic_store_var: {
+         assert(mode == nir_var_shader_out || mode == nir_var_shared);
+
+         nir_ssa_def *offset;
+         nir_ssa_def *vertex_index;
+
+         bool per_vertex =
+            is_per_vertex_output(state, intrin->variables[0]->var);
+
+         offset = get_io_offset(b, intrin->variables[0],
+                                per_vertex ? &vertex_index : NULL,
+                                state->type_size);
+
+         nir_intrinsic_instr *store =
+            nir_intrinsic_instr_create(state->mem_ctx,
+                                       store_op(state, mode, per_vertex));
+         store->num_components = intrin->num_components;
+
+         nir_src_copy(&store->src[0], &intrin->src[0], store);
+
+         store->const_index[0] =
+            intrin->variables[0]->var->data.driver_location;
+
+         /* Copy the writemask */
+         store->const_index[1] = intrin->const_index[0];
+
+         if (per_vertex)
+            store->src[1] = nir_src_for_ssa(vertex_index);
+
+         store->src[per_vertex ? 2 : 1] = nir_src_for_ssa(offset);
+
+         nir_instr_insert_before(&intrin->instr, &store->instr);
+         nir_instr_remove(&intrin->instr);
+         break;
+      }
+
+      case nir_intrinsic_var_atomic_add:
+      case nir_intrinsic_var_atomic_imin:
+      case nir_intrinsic_var_atomic_umin:
+      case nir_intrinsic_var_atomic_imax:
+      case nir_intrinsic_var_atomic_umax:
+      case nir_intrinsic_var_atomic_and:
+      case nir_intrinsic_var_atomic_or:
+      case nir_intrinsic_var_atomic_xor:
+      case nir_intrinsic_var_atomic_exchange:
+      case nir_intrinsic_var_atomic_comp_swap: {
+         assert(mode == nir_var_shared);
+
+         nir_ssa_def *offset;
+
+         offset = get_io_offset(b, intrin->variables[0],
+                                NULL, state->type_size);
+
+         nir_intrinsic_instr *atomic =
+            nir_intrinsic_instr_create(state->mem_ctx,
+                                       atomic_op(intrin->intrinsic));
+
+         atomic->src[0] = nir_src_for_ssa(offset);
+
+         atomic->const_index[0] =
+            intrin->variables[0]->var->data.driver_location;
+
+         nir_src_copy(&atomic->src[1], &intrin->src[0], atomic);
+
+         if (intrin->intrinsic == nir_intrinsic_var_atomic_comp_swap)
+            nir_src_copy(&atomic->src[2], &intrin->src[1], atomic);
+
+         if (intrin->dest.is_ssa) {
+            nir_ssa_dest_init(&atomic->instr, &atomic->dest,
+                              intrin->dest.ssa.num_components, NULL);
+            nir_ssa_def_rewrite_uses(&intrin->dest.ssa,
+                                     nir_src_for_ssa(&atomic->dest.ssa));
+         } else {
+            nir_dest_copy(&atomic->dest, &intrin->dest, state->mem_ctx);
+         }
+
+         nir_instr_insert_before(&intrin->instr, &atomic->instr);
+         nir_instr_remove(&intrin->instr);
+         break;
+      }
+
+      default:
+         break;
+      }
+   }
+
+   return true;
+}
+
+static void
+nir_lower_io_impl(nir_function_impl *impl,
+                  nir_variable_mode mode,
+                  int (*type_size)(const struct glsl_type *))
+{
+   struct lower_io_state state;
+
+   nir_builder_init(&state.builder, impl);
+   state.mem_ctx = ralloc_parent(impl);
+   state.mode = mode;
+   state.type_size = type_size;
+
+   nir_foreach_block(impl, nir_lower_io_block, &state);
+
+   nir_metadata_preserve(impl, nir_metadata_block_index |
+                               nir_metadata_dominance);
+}
+
+void
+nir_lower_io(nir_shader *shader, nir_variable_mode mode,
+             int (*type_size)(const struct glsl_type *))
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         nir_lower_io_impl(function->impl, mode, type_size);
+   }
+}
+
+/**
+ * Return the offset soruce for a load/store intrinsic.
+ */
+nir_src *
+nir_get_io_offset_src(nir_intrinsic_instr *instr)
+{
+   switch (instr->intrinsic) {
+   case nir_intrinsic_load_input:
+   case nir_intrinsic_load_output:
+   case nir_intrinsic_load_uniform:
+      return &instr->src[0];
+   case nir_intrinsic_load_ubo:
+   case nir_intrinsic_load_ssbo:
+   case nir_intrinsic_load_per_vertex_input:
+   case nir_intrinsic_load_per_vertex_output:
+   case nir_intrinsic_store_output:
+      return &instr->src[1];
+   case nir_intrinsic_store_ssbo:
+   case nir_intrinsic_store_per_vertex_output:
+      return &instr->src[2];
+   default:
+      return NULL;
+   }
+}
+
+/**
+ * Return the vertex index source for a load/store per_vertex intrinsic.
+ */
+nir_src *
+nir_get_io_vertex_index_src(nir_intrinsic_instr *instr)
+{
+   switch (instr->intrinsic) {
+   case nir_intrinsic_load_per_vertex_input:
+   case nir_intrinsic_load_per_vertex_output:
+      return &instr->src[0];
+   case nir_intrinsic_store_per_vertex_output:
+      return &instr->src[1];
+   default:
+      return NULL;
+   }
+}
diff --git a/src/compiler/nir/nir_lower_load_const_to_scalar.c b/src/compiler/nir/nir_lower_load_const_to_scalar.c
new file mode 100644
index 00000000000..1eeed13cbac
--- /dev/null
+++ b/src/compiler/nir/nir_lower_load_const_to_scalar.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright © 2015 Broadcom
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "util/macros.h"
+#include "nir.h"
+#include "nir_builder.h"
+
+/** @file nir_lower_load_const_to_scalar.c
+ *
+ * Replaces vector nir_load_const instructions with a series of loads and a
+ * vec[234] to reconstruct the original vector (on the assumption that
+ * nir_lower_alu_to_scalar() will then be used to split it up).
+ *
+ * This gives NIR a chance to CSE more operations on a scalar shader, when the
+ * same value was used in different vector contant loads.
+ */
+
+static void
+lower_load_const_instr_scalar(nir_load_const_instr *lower)
+{
+   if (lower->def.num_components == 1)
+      return;
+
+   nir_builder b;
+   nir_builder_init(&b, nir_cf_node_get_function(&lower->instr.block->cf_node));
+   b.cursor = nir_before_instr(&lower->instr);
+
+   /* Emit the individual loads. */
+   nir_ssa_def *loads[4];
+   for (unsigned i = 0; i < lower->def.num_components; i++) {
+      nir_load_const_instr *load_comp = nir_load_const_instr_create(b.shader, 1);
+      load_comp->value.u[0] = lower->value.u[i];
+      nir_builder_instr_insert(&b, &load_comp->instr);
+      loads[i] = &load_comp->def;
+   }
+
+   /* Batch things back together into a vector. */
+   nir_ssa_def *vec = nir_vec(&b, loads, lower->def.num_components);
+
+   /* Replace the old load with a reference to our reconstructed vector. */
+   nir_ssa_def_rewrite_uses(&lower->def, nir_src_for_ssa(vec));
+   nir_instr_remove(&lower->instr);
+}
+
+static bool
+lower_load_const_to_scalar_block(nir_block *block, void *data)
+{
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type == nir_instr_type_load_const)
+         lower_load_const_instr_scalar(nir_instr_as_load_const(instr));
+   }
+
+   return true;
+}
+
+static void
+nir_lower_load_const_to_scalar_impl(nir_function_impl *impl)
+{
+   nir_foreach_block(impl, lower_load_const_to_scalar_block, NULL);
+}
+
+void
+nir_lower_load_const_to_scalar(nir_shader *shader)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         nir_lower_load_const_to_scalar_impl(function->impl);
+   }
+}
diff --git a/src/compiler/nir/nir_lower_locals_to_regs.c b/src/compiler/nir/nir_lower_locals_to_regs.c
new file mode 100644
index 00000000000..51b0fa733f2
--- /dev/null
+++ b/src/compiler/nir/nir_lower_locals_to_regs.c
@@ -0,0 +1,396 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir.h"
+#include "nir_array.h"
+
+struct locals_to_regs_state {
+   nir_shader *shader;
+   nir_function_impl *impl;
+
+   /* A hash table mapping derefs to registers */
+   struct hash_table *regs_table;
+
+   /* A growing array of derefs that we have encountered.  There is exactly
+    * one element of this array per element in the hash table.  This is
+    * used to make adding register initialization code deterministic.
+    */
+   nir_array derefs_array;
+
+   bool progress;
+};
+
+/* The following two functions implement a hash and equality check for
+ * variable dreferences.  When the hash or equality function encounters an
+ * array, it ignores the offset and whether it is direct or indirect
+ * entirely.
+ */
+static uint32_t
+hash_deref(const void *void_deref)
+{
+   uint32_t hash = _mesa_fnv32_1a_offset_bias;
+
+   const nir_deref_var *deref_var = void_deref;
+   hash = _mesa_fnv32_1a_accumulate(hash, deref_var->var);
+
+   for (const nir_deref *deref = deref_var->deref.child;
+        deref; deref = deref->child) {
+      if (deref->deref_type == nir_deref_type_struct) {
+         const nir_deref_struct *deref_struct = nir_deref_as_struct(deref);
+         hash = _mesa_fnv32_1a_accumulate(hash, deref_struct->index);
+      }
+   }
+
+   return hash;
+}
+
+static bool
+derefs_equal(const void *void_a, const void *void_b)
+{
+   const nir_deref_var *a_var = void_a;
+   const nir_deref_var *b_var = void_b;
+
+   if (a_var->var != b_var->var)
+      return false;
+
+   for (const nir_deref *a = a_var->deref.child, *b = b_var->deref.child;
+        a != NULL; a = a->child, b = b->child) {
+      if (a->deref_type != b->deref_type)
+         return false;
+
+      if (a->deref_type == nir_deref_type_struct) {
+         if (nir_deref_as_struct(a)->index != nir_deref_as_struct(b)->index)
+            return false;
+      }
+      /* Do nothing for arrays.  They're all the same. */
+
+      assert((a->child == NULL) == (b->child == NULL));
+      if((a->child == NULL) != (b->child == NULL))
+         return false;
+   }
+
+   return true;
+}
+
+static nir_register *
+get_reg_for_deref(nir_deref_var *deref, struct locals_to_regs_state *state)
+{
+   uint32_t hash = hash_deref(deref);
+
+   struct hash_entry *entry =
+      _mesa_hash_table_search_pre_hashed(state->regs_table, hash, deref);
+   if (entry)
+      return entry->data;
+
+   unsigned array_size = 1;
+   nir_deref *tail = &deref->deref;
+   while (tail->child) {
+      if (tail->child->deref_type == nir_deref_type_array)
+         array_size *= glsl_get_length(tail->type);
+      tail = tail->child;
+   }
+
+   assert(glsl_type_is_vector(tail->type) || glsl_type_is_scalar(tail->type));
+
+   nir_register *reg = nir_local_reg_create(state->impl);
+   reg->num_components = glsl_get_vector_elements(tail->type);
+   reg->num_array_elems = array_size > 1 ? array_size : 0;
+
+   _mesa_hash_table_insert_pre_hashed(state->regs_table, hash, deref, reg);
+   nir_array_add(&state->derefs_array, nir_deref_var *, deref);
+
+   return reg;
+}
+
+static nir_src
+get_deref_reg_src(nir_deref_var *deref, nir_instr *instr,
+                  struct locals_to_regs_state *state)
+{
+   nir_src src;
+
+   src.is_ssa = false;
+   src.reg.reg = get_reg_for_deref(deref, state);
+   src.reg.base_offset = 0;
+   src.reg.indirect = NULL;
+
+   /* It is possible for a user to create a shader that has an array with a
+    * single element and then proceed to access it indirectly.  Indirectly
+    * accessing a non-array register is not allowed in NIR.  In order to
+    * handle this case we just convert it to a direct reference.
+    */
+   if (src.reg.reg->num_array_elems == 0)
+      return src;
+
+   nir_deref *tail = &deref->deref;
+   while (tail->child != NULL) {
+      const struct glsl_type *parent_type = tail->type;
+      tail = tail->child;
+
+      if (tail->deref_type != nir_deref_type_array)
+         continue;
+
+      nir_deref_array *deref_array = nir_deref_as_array(tail);
+
+      src.reg.base_offset *= glsl_get_length(parent_type);
+      src.reg.base_offset += deref_array->base_offset;
+
+      if (src.reg.indirect) {
+         nir_load_const_instr *load_const =
+            nir_load_const_instr_create(state->shader, 1);
+         load_const->value.u[0] = glsl_get_length(parent_type);
+         nir_instr_insert_before(instr, &load_const->instr);
+
+         nir_alu_instr *mul = nir_alu_instr_create(state->shader, nir_op_imul);
+         mul->src[0].src = *src.reg.indirect;
+         mul->src[1].src.is_ssa = true;
+         mul->src[1].src.ssa = &load_const->def;
+         mul->dest.write_mask = 1;
+         nir_ssa_dest_init(&mul->instr, &mul->dest.dest, 1, NULL);
+         nir_instr_insert_before(instr, &mul->instr);
+
+         src.reg.indirect->is_ssa = true;
+         src.reg.indirect->ssa = &mul->dest.dest.ssa;
+      }
+
+      if (deref_array->deref_array_type == nir_deref_array_type_indirect) {
+         if (src.reg.indirect == NULL) {
+            src.reg.indirect = ralloc(state->shader, nir_src);
+            nir_src_copy(src.reg.indirect, &deref_array->indirect,
+                         state->shader);
+         } else {
+            nir_alu_instr *add = nir_alu_instr_create(state->shader,
+                                                      nir_op_iadd);
+            add->src[0].src = *src.reg.indirect;
+            nir_src_copy(&add->src[1].src, &deref_array->indirect, add);
+            add->dest.write_mask = 1;
+            nir_ssa_dest_init(&add->instr, &add->dest.dest, 1, NULL);
+            nir_instr_insert_before(instr, &add->instr);
+
+            src.reg.indirect->is_ssa = true;
+            src.reg.indirect->ssa = &add->dest.dest.ssa;
+         }
+      }
+   }
+
+   return src;
+}
+
+static bool
+lower_locals_to_regs_block(nir_block *block, void *void_state)
+{
+   struct locals_to_regs_state *state = void_state;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_intrinsic)
+         continue;
+
+      nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+
+      switch (intrin->intrinsic) {
+      case nir_intrinsic_load_var: {
+         if (intrin->variables[0]->var->data.mode != nir_var_local)
+            continue;
+
+         nir_alu_instr *mov = nir_alu_instr_create(state->shader, nir_op_imov);
+         mov->src[0].src = get_deref_reg_src(intrin->variables[0],
+                                             &intrin->instr, state);
+         mov->dest.write_mask = (1 << intrin->num_components) - 1;
+         if (intrin->dest.is_ssa) {
+            nir_ssa_dest_init(&mov->instr, &mov->dest.dest,
+                              intrin->num_components, NULL);
+            nir_ssa_def_rewrite_uses(&intrin->dest.ssa,
+                                     nir_src_for_ssa(&mov->dest.dest.ssa));
+         } else {
+            nir_dest_copy(&mov->dest.dest, &intrin->dest, &mov->instr);
+         }
+         nir_instr_insert_before(&intrin->instr, &mov->instr);
+
+         nir_instr_remove(&intrin->instr);
+         state->progress = true;
+         break;
+      }
+
+      case nir_intrinsic_store_var: {
+         if (intrin->variables[0]->var->data.mode != nir_var_local)
+            continue;
+
+         nir_src reg_src = get_deref_reg_src(intrin->variables[0],
+                                             &intrin->instr, state);
+
+         nir_alu_instr *mov = nir_alu_instr_create(state->shader, nir_op_imov);
+         nir_src_copy(&mov->src[0].src, &intrin->src[0], mov);
+         mov->dest.write_mask = intrin->const_index[0];
+         mov->dest.dest.is_ssa = false;
+         mov->dest.dest.reg.reg = reg_src.reg.reg;
+         mov->dest.dest.reg.base_offset = reg_src.reg.base_offset;
+         mov->dest.dest.reg.indirect = reg_src.reg.indirect;
+
+         nir_instr_insert_before(&intrin->instr, &mov->instr);
+
+         nir_instr_remove(&intrin->instr);
+         state->progress = true;
+         break;
+      }
+
+      case nir_intrinsic_copy_var:
+         unreachable("There should be no copies whatsoever at this point");
+         break;
+
+      default:
+         continue;
+      }
+   }
+
+   return true;
+}
+
+static nir_block *
+compute_reg_usedef_lca(nir_register *reg)
+{
+   nir_block *lca = NULL;
+
+   list_for_each_entry(nir_dest, def_dest, &reg->defs, reg.def_link)
+      lca = nir_dominance_lca(lca, def_dest->reg.parent_instr->block);
+
+   list_for_each_entry(nir_src, use_src, &reg->uses, use_link)
+      lca = nir_dominance_lca(lca, use_src->parent_instr->block);
+
+   list_for_each_entry(nir_src, use_src, &reg->if_uses, use_link) {
+      nir_cf_node *prev_node = nir_cf_node_prev(&use_src->parent_if->cf_node);
+      assert(prev_node->type == nir_cf_node_block);
+      lca = nir_dominance_lca(lca, nir_cf_node_as_block(prev_node));
+   }
+
+   return lca;
+}
+
+static void
+insert_constant_initializer(nir_deref_var *deref_head, nir_deref *deref_tail,
+                            nir_block *block,
+                            struct locals_to_regs_state *state)
+{
+   if (deref_tail->child) {
+      switch (deref_tail->child->deref_type) {
+      case nir_deref_type_array: {
+         unsigned array_elems = glsl_get_length(deref_tail->type);
+
+         nir_deref_array arr_deref;
+         arr_deref.deref = *deref_tail->child;
+         arr_deref.deref_array_type = nir_deref_array_type_direct;
+
+         nir_deref *old_child = deref_tail->child;
+         deref_tail->child = &arr_deref.deref;
+         for (unsigned i = 0; i < array_elems; i++) {
+            arr_deref.base_offset = i;
+            insert_constant_initializer(deref_head, &arr_deref.deref,
+                                        block, state);
+         }
+         deref_tail->child = old_child;
+         return;
+      }
+
+      case nir_deref_type_struct:
+         insert_constant_initializer(deref_head, deref_tail->child,
+                                     block, state);
+         return;
+
+      default:
+         unreachable("Invalid deref child type");
+      }
+   }
+
+   assert(deref_tail->child == NULL);
+
+   nir_load_const_instr *load =
+      nir_deref_get_const_initializer_load(state->shader, deref_head);
+   nir_instr_insert_before_block(block, &load->instr);
+
+   nir_src reg_src = get_deref_reg_src(deref_head, &load->instr, state);
+
+   nir_alu_instr *mov = nir_alu_instr_create(state->shader, nir_op_imov);
+   mov->src[0].src = nir_src_for_ssa(&load->def);
+   mov->dest.write_mask = (1 << load->def.num_components) - 1;
+   mov->dest.dest.is_ssa = false;
+   mov->dest.dest.reg.reg = reg_src.reg.reg;
+   mov->dest.dest.reg.base_offset = reg_src.reg.base_offset;
+   mov->dest.dest.reg.indirect = reg_src.reg.indirect;
+
+   nir_instr_insert_after(&load->instr, &mov->instr);
+   state->progress = true;
+}
+
+static bool
+nir_lower_locals_to_regs_impl(nir_function_impl *impl)
+{
+   struct locals_to_regs_state state;
+
+   state.shader = impl->function->shader;
+   state.impl = impl;
+   state.progress = false;
+   state.regs_table = _mesa_hash_table_create(NULL, hash_deref, derefs_equal);
+   nir_array_init(&state.derefs_array, NULL);
+
+   nir_metadata_require(impl, nir_metadata_dominance);
+
+   nir_foreach_block(impl, lower_locals_to_regs_block, &state);
+
+   nir_array_foreach(&state.derefs_array, nir_deref_var *, deref_ptr) {
+      nir_deref_var *deref = *deref_ptr;
+      struct hash_entry *deref_entry =
+         _mesa_hash_table_search(state.regs_table, deref);
+      assert(deref_entry && deref_entry->key == deref);
+      nir_register *reg = (nir_register *)deref_entry->data;
+
+      if (deref->var->constant_initializer == NULL)
+         continue;
+
+      nir_block *usedef_lca = compute_reg_usedef_lca(reg);
+
+      insert_constant_initializer(deref, &deref->deref, usedef_lca, &state);
+   }
+
+   nir_metadata_preserve(impl, nir_metadata_block_index |
+                               nir_metadata_dominance);
+
+   nir_array_fini(&state.derefs_array);
+   _mesa_hash_table_destroy(state.regs_table, NULL);
+
+   return state.progress;
+}
+
+bool
+nir_lower_locals_to_regs(nir_shader *shader)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         progress = nir_lower_locals_to_regs_impl(function->impl) || progress;
+   }
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_lower_outputs_to_temporaries.c b/src/compiler/nir/nir_lower_outputs_to_temporaries.c
new file mode 100644
index 00000000000..00ac09114cf
--- /dev/null
+++ b/src/compiler/nir/nir_lower_outputs_to_temporaries.c
@@ -0,0 +1,136 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+/*
+ * Implements a pass that lowers output variables to a temporary plus an
+ * output variable with a single copy at each exit point of the shader.
+ * This way the output variable is only ever written.
+ *
+ * Because valid NIR requires that output variables are never read, this
+ * pass is more of a helper for NIR producers and must be run before the
+ * shader is ever validated.
+ */
+
+#include "nir.h"
+
+struct lower_outputs_state {
+   nir_shader *shader;
+   struct exec_list old_outputs;
+};
+
+static void
+emit_output_copies(nir_cursor cursor, struct lower_outputs_state *state)
+{
+   assert(exec_list_length(&state->shader->outputs) ==
+          exec_list_length(&state->old_outputs));
+
+   foreach_two_lists(out_node, &state->shader->outputs,
+                     temp_node, &state->old_outputs) {
+      nir_variable *output = exec_node_data(nir_variable, out_node, node);
+      nir_variable *temp = exec_node_data(nir_variable, temp_node, node);
+
+      nir_intrinsic_instr *copy =
+         nir_intrinsic_instr_create(state->shader, nir_intrinsic_copy_var);
+      copy->variables[0] = nir_deref_var_create(copy, output);
+      copy->variables[1] = nir_deref_var_create(copy, temp);
+
+      nir_instr_insert(cursor, &copy->instr);
+   }
+}
+
+static bool
+emit_output_copies_block(nir_block *block, void *state)
+{
+   nir_foreach_instr(block, instr) {
+      if (instr->type != nir_instr_type_intrinsic)
+         continue;
+
+      nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+      if (intrin->intrinsic == nir_intrinsic_emit_vertex)
+         emit_output_copies(nir_before_instr(&intrin->instr), state);
+   }
+
+   return true;
+}
+
+void
+nir_lower_outputs_to_temporaries(nir_shader *shader, nir_function *entrypoint)
+{
+   struct lower_outputs_state state;
+
+   if (shader->stage == MESA_SHADER_TESS_CTRL)
+      return;
+
+   state.shader = shader;
+   exec_list_move_nodes_to(&shader->outputs, &state.old_outputs);
+
+   /* Walk over all of the outputs turn each output into a temporary and
+    * make a new variable for the actual output.
+    */
+   nir_foreach_variable(var, &state.old_outputs) {
+      nir_variable *output = ralloc(shader, nir_variable);
+      memcpy(output, var, sizeof *output);
+
+      /* The orignal is now the temporary */
+      nir_variable *temp = var;
+
+      /* Reparent the name to the new variable */
+      ralloc_steal(output, output->name);
+
+      /* Reparent the constant initializer (if any) */
+      ralloc_steal(output, output->constant_initializer);
+
+      /* Give the output a new name with @out-temp appended */
+      temp->name = ralloc_asprintf(var, "%s@out-temp", output->name);
+      temp->data.mode = nir_var_global;
+      temp->constant_initializer = NULL;
+
+      exec_list_push_tail(&shader->outputs, &output->node);
+   }
+
+   nir_foreach_function(shader, function) {
+      if (function->impl == NULL)
+         continue;
+
+      if (shader->stage == MESA_SHADER_GEOMETRY) {
+         /* For geometry shaders, we have to emit the output copies right
+          * before each EmitVertex call.
+          */
+         nir_foreach_block(function->impl, emit_output_copies_block, &state);
+      } else if (function == entrypoint) {
+         /* For all other shader types, we need to do the copies right before
+          * the jumps to the end block.
+          */
+         struct set_entry *block_entry;
+         set_foreach(function->impl->end_block->predecessors, block_entry) {
+            struct nir_block *block = (void *)block_entry->key;
+            emit_output_copies(nir_after_block_before_jump(block), &state);
+         }
+      }
+
+      nir_metadata_preserve(function->impl, nir_metadata_block_index |
+                                            nir_metadata_dominance);
+   }
+
+   exec_list_append(&shader->globals, &state.old_outputs);
+}
diff --git a/src/compiler/nir/nir_lower_phis_to_scalar.c b/src/compiler/nir/nir_lower_phis_to_scalar.c
new file mode 100644
index 00000000000..dd2abcf72f8
--- /dev/null
+++ b/src/compiler/nir/nir_lower_phis_to_scalar.c
@@ -0,0 +1,293 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir.h"
+
+/*
+ * Implements a pass that lowers vector phi nodes to scalar phi nodes when
+ * we don't think it will hurt anything.
+ */
+
+struct lower_phis_to_scalar_state {
+   void *mem_ctx;
+   void *dead_ctx;
+
+   /* Hash table marking which phi nodes are scalarizable.  The key is
+    * pointers to phi instructions and the entry is either NULL for not
+    * scalarizable or non-null for scalarizable.
+    */
+   struct hash_table *phi_table;
+};
+
+static bool
+should_lower_phi(nir_phi_instr *phi, struct lower_phis_to_scalar_state *state);
+
+static bool
+is_phi_src_scalarizable(nir_phi_src *src,
+                        struct lower_phis_to_scalar_state *state)
+{
+   /* Don't know what to do with non-ssa sources */
+   if (!src->src.is_ssa)
+      return false;
+
+   nir_instr *src_instr = src->src.ssa->parent_instr;
+   switch (src_instr->type) {
+   case nir_instr_type_alu: {
+      nir_alu_instr *src_alu = nir_instr_as_alu(src_instr);
+
+      /* ALU operations with output_size == 0 should be scalarized.  We
+       * will also see a bunch of vecN operations from scalarizing ALU
+       * operations and, since they can easily be copy-propagated, they
+       * are ok too.
+       */
+      return nir_op_infos[src_alu->op].output_size == 0 ||
+             src_alu->op == nir_op_vec2 ||
+             src_alu->op == nir_op_vec3 ||
+             src_alu->op == nir_op_vec4;
+   }
+
+   case nir_instr_type_phi:
+      /* A phi is scalarizable if we're going to lower it */
+      return should_lower_phi(nir_instr_as_phi(src_instr), state);
+
+   case nir_instr_type_load_const:
+   case nir_instr_type_ssa_undef:
+      /* These are trivially scalarizable */
+      return true;
+
+   case nir_instr_type_intrinsic: {
+      nir_intrinsic_instr *src_intrin = nir_instr_as_intrinsic(src_instr);
+
+      switch (src_intrin->intrinsic) {
+      case nir_intrinsic_load_var:
+         return src_intrin->variables[0]->var->data.mode == nir_var_shader_in ||
+                src_intrin->variables[0]->var->data.mode == nir_var_uniform;
+
+      case nir_intrinsic_interp_var_at_centroid:
+      case nir_intrinsic_interp_var_at_sample:
+      case nir_intrinsic_interp_var_at_offset:
+      case nir_intrinsic_load_uniform:
+      case nir_intrinsic_load_ubo:
+      case nir_intrinsic_load_ssbo:
+      case nir_intrinsic_load_input:
+         return true;
+      default:
+         break;
+      }
+   }
+
+   default:
+      /* We can't scalarize this type of instruction */
+      return false;
+   }
+}
+
+/**
+ * Determines if the given phi node should be lowered.  The only phi nodes
+ * we will scalarize at the moment are those where all of the sources are
+ * scalarizable.
+ *
+ * The reason for this comes down to coalescing.  Since phi sources can't
+ * swizzle, swizzles on phis have to be resolved by inserting a mov right
+ * before the phi.  The choice then becomes between movs to pick off
+ * components for a scalar phi or potentially movs to recombine components
+ * for a vector phi.  The problem is that the movs generated to pick off
+ * the components are almost uncoalescable.  We can't coalesce them in NIR
+ * because we need them to pick off components and we can't coalesce them
+ * in the backend because the source register is a vector and the
+ * destination is a scalar that may be used at other places in the program.
+ * On the other hand, if we have a bunch of scalars going into a vector
+ * phi, the situation is much better.  In this case, if the SSA def is
+ * generated in the predecessor block to the corresponding phi source, the
+ * backend code will be an ALU op into a temporary and then a mov into the
+ * given vector component;  this move can almost certainly be coalesced
+ * away.
+ */
+static bool
+should_lower_phi(nir_phi_instr *phi, struct lower_phis_to_scalar_state *state)
+{
+   /* Already scalar */
+   if (phi->dest.ssa.num_components == 1)
+      return false;
+
+   struct hash_entry *entry = _mesa_hash_table_search(state->phi_table, phi);
+   if (entry)
+      return entry->data != NULL;
+
+   /* Insert an entry and mark it as scalarizable for now. That way
+    * we don't recurse forever and a cycle in the dependence graph
+    * won't automatically make us fail to scalarize.
+    */
+   entry = _mesa_hash_table_insert(state->phi_table, phi, (void *)(intptr_t)1);
+
+   bool scalarizable = true;
+
+   nir_foreach_phi_src(phi, src) {
+      scalarizable = is_phi_src_scalarizable(src, state);
+      if (!scalarizable)
+         break;
+   }
+
+   /* The hash table entry for 'phi' may have changed while recursing the
+    * dependence graph, so we need to reset it */
+   entry = _mesa_hash_table_search(state->phi_table, phi);
+   assert(entry);
+
+   entry->data = (void *)(intptr_t)scalarizable;
+
+   return scalarizable;
+}
+
+static bool
+lower_phis_to_scalar_block(nir_block *block, void *void_state)
+{
+   struct lower_phis_to_scalar_state *state = void_state;
+
+   /* Find the last phi node in the block */
+   nir_phi_instr *last_phi = NULL;
+   nir_foreach_instr(block, instr) {
+      if (instr->type != nir_instr_type_phi)
+         break;
+
+      last_phi = nir_instr_as_phi(instr);
+   }
+
+   /* We have to handle the phi nodes in their own pass due to the way
+    * we're modifying the linked list of instructions.
+    */
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_phi)
+         break;
+
+      nir_phi_instr *phi = nir_instr_as_phi(instr);
+
+      if (!should_lower_phi(phi, state))
+         continue;
+
+      /* Create a vecN operation to combine the results.  Most of these
+       * will be redundant, but copy propagation should clean them up for
+       * us.  No need to add the complexity here.
+       */
+      nir_op vec_op;
+      switch (phi->dest.ssa.num_components) {
+      case 2: vec_op = nir_op_vec2; break;
+      case 3: vec_op = nir_op_vec3; break;
+      case 4: vec_op = nir_op_vec4; break;
+      default: unreachable("Invalid number of components");
+      }
+
+      nir_alu_instr *vec = nir_alu_instr_create(state->mem_ctx, vec_op);
+      nir_ssa_dest_init(&vec->instr, &vec->dest.dest,
+                        phi->dest.ssa.num_components, NULL);
+      vec->dest.write_mask = (1 << phi->dest.ssa.num_components) - 1;
+
+      for (unsigned i = 0; i < phi->dest.ssa.num_components; i++) {
+         nir_phi_instr *new_phi = nir_phi_instr_create(state->mem_ctx);
+         nir_ssa_dest_init(&new_phi->instr, &new_phi->dest, 1, NULL);
+
+         vec->src[i].src = nir_src_for_ssa(&new_phi->dest.ssa);
+
+         nir_foreach_phi_src(phi, src) {
+            /* We need to insert a mov to grab the i'th component of src */
+            nir_alu_instr *mov = nir_alu_instr_create(state->mem_ctx,
+                                                      nir_op_imov);
+            nir_ssa_dest_init(&mov->instr, &mov->dest.dest, 1, NULL);
+            mov->dest.write_mask = 1;
+            nir_src_copy(&mov->src[0].src, &src->src, state->mem_ctx);
+            mov->src[0].swizzle[0] = i;
+
+            /* Insert at the end of the predecessor but before the jump */
+            nir_instr *pred_last_instr = nir_block_last_instr(src->pred);
+            if (pred_last_instr && pred_last_instr->type == nir_instr_type_jump)
+               nir_instr_insert_before(pred_last_instr, &mov->instr);
+            else
+               nir_instr_insert_after_block(src->pred, &mov->instr);
+
+            nir_phi_src *new_src = ralloc(new_phi, nir_phi_src);
+            new_src->pred = src->pred;
+            new_src->src = nir_src_for_ssa(&mov->dest.dest.ssa);
+
+            exec_list_push_tail(&new_phi->srcs, &new_src->node);
+         }
+
+         nir_instr_insert_before(&phi->instr, &new_phi->instr);
+      }
+
+      nir_instr_insert_after(&last_phi->instr, &vec->instr);
+
+      nir_ssa_def_rewrite_uses(&phi->dest.ssa,
+                               nir_src_for_ssa(&vec->dest.dest.ssa));
+
+      ralloc_steal(state->dead_ctx, phi);
+      nir_instr_remove(&phi->instr);
+
+      /* We're using the safe iterator and inserting all the newly
+       * scalarized phi nodes before their non-scalarized version so that's
+       * ok.  However, we are also inserting vec operations after all of
+       * the last phi node so once we get here, we can't trust even the
+       * safe iterator to stop properly.  We have to break manually.
+       */
+      if (instr == &last_phi->instr)
+         break;
+   }
+
+   return true;
+}
+
+static void
+lower_phis_to_scalar_impl(nir_function_impl *impl)
+{
+   struct lower_phis_to_scalar_state state;
+
+   state.mem_ctx = ralloc_parent(impl);
+   state.dead_ctx = ralloc_context(NULL);
+   state.phi_table = _mesa_hash_table_create(state.dead_ctx, _mesa_hash_pointer,
+                                             _mesa_key_pointer_equal);
+
+   nir_foreach_block(impl, lower_phis_to_scalar_block, &state);
+
+   nir_metadata_preserve(impl, nir_metadata_block_index |
+                               nir_metadata_dominance);
+
+   ralloc_free(state.dead_ctx);
+}
+
+/** A pass that lowers vector phi nodes to scalar
+ *
+ * This pass loops through the blocks and lowers looks for vector phi nodes
+ * it can lower to scalar phi nodes.  Not all phi nodes are lowered.  For
+ * instance, if one of the sources is a non-scalarizable vector, then we
+ * don't bother lowering because that would generate hard-to-coalesce movs.
+ */
+void
+nir_lower_phis_to_scalar(nir_shader *shader)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         lower_phis_to_scalar_impl(function->impl);
+   }
+}
diff --git a/src/compiler/nir/nir_lower_returns.c b/src/compiler/nir/nir_lower_returns.c
new file mode 100644
index 00000000000..91bb2f7dfeb
--- /dev/null
+++ b/src/compiler/nir/nir_lower_returns.c
@@ -0,0 +1,246 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+#include "nir_control_flow.h"
+
+struct lower_returns_state {
+   nir_builder builder;
+   struct exec_list *cf_list;
+   nir_loop *loop;
+   nir_variable *return_flag;
+};
+
+static bool lower_returns_in_cf_list(struct exec_list *cf_list,
+                                     struct lower_returns_state *state);
+
+static void
+predicate_following(nir_cf_node *node, struct lower_returns_state *state)
+{
+   nir_builder *b = &state->builder;
+   b->cursor = nir_after_cf_node_and_phis(node);
+
+   if (nir_cursors_equal(b->cursor, nir_after_cf_list(state->cf_list)))
+      return; /* Nothing to predicate */
+
+   assert(state->return_flag);
+
+   nir_if *if_stmt = nir_if_create(b->shader);
+   if_stmt->condition = nir_src_for_ssa(nir_load_var(b, state->return_flag));
+   nir_cf_node_insert(b->cursor, &if_stmt->cf_node);
+
+   if (state->loop) {
+      /* If we're inside of a loop, then all we need to do is insert a
+       * conditional break.
+       */
+      nir_jump_instr *brk =
+         nir_jump_instr_create(state->builder.shader, nir_jump_break);
+      nir_instr_insert(nir_before_cf_list(&if_stmt->then_list), &brk->instr);
+   } else {
+      /* Otherwise, we need to actually move everything into the else case
+       * of the if statement.
+       */
+      nir_cf_list list;
+      nir_cf_extract(&list, nir_after_cf_node(&if_stmt->cf_node),
+                            nir_after_cf_list(state->cf_list));
+      assert(!exec_list_is_empty(&list.list));
+      nir_cf_reinsert(&list, nir_before_cf_list(&if_stmt->else_list));
+   }
+}
+
+static bool
+lower_returns_in_loop(nir_loop *loop, struct lower_returns_state *state)
+{
+   nir_loop *parent = state->loop;
+   state->loop = loop;
+   bool progress = lower_returns_in_cf_list(&loop->body, state);
+   state->loop = parent;
+
+   /* If the recursive call made progress, then there were returns inside
+    * of the loop.  These would have been lowered to breaks with the return
+    * flag set to true.  We need to predicate everything following the loop
+    * on the return flag.
+    */
+   if (progress)
+      predicate_following(&loop->cf_node, state);
+
+   return progress;
+}
+
+static bool
+lower_returns_in_if(nir_if *if_stmt, struct lower_returns_state *state)
+{
+   bool progress;
+
+   progress = lower_returns_in_cf_list(&if_stmt->then_list, state);
+   progress = lower_returns_in_cf_list(&if_stmt->else_list, state) || progress;
+
+   /* If either of the recursive calls made progress, then there were
+    * returns inside of the body of the if.  If we're in a loop, then these
+    * were lowered to breaks which automatically skip to the end of the
+    * loop so we don't have to do anything.  If we're not in a loop, then
+    * all we know is that the return flag is set appropreately and that the
+    * recursive calls ensured that nothing gets executed *inside* the if
+    * after a return.  In order to ensure nothing outside gets executed
+    * after a return, we need to predicate everything following on the
+    * return flag.
+    */
+   if (progress && !state->loop)
+      predicate_following(&if_stmt->cf_node, state);
+
+   return progress;
+}
+
+static bool
+lower_returns_in_block(nir_block *block, struct lower_returns_state *state)
+{
+   if (block->predecessors->entries == 0 &&
+       block != nir_start_block(state->builder.impl)) {
+      /* This block is unreachable.  Delete it and everything after it. */
+      nir_cf_list list;
+      nir_cf_extract(&list, nir_before_cf_node(&block->cf_node),
+                            nir_after_cf_list(state->cf_list));
+
+      if (exec_list_is_empty(&list.list)) {
+         /* There's nothing here, which also means there's nothing in this
+          * block so we have nothing to do.
+          */
+         return false;
+      } else {
+         nir_cf_delete(&list);
+         return true;
+      }
+   }
+
+   nir_instr *last_instr = nir_block_last_instr(block);
+   if (last_instr == NULL)
+      return false;
+
+   if (last_instr->type != nir_instr_type_jump)
+      return false;
+
+   nir_jump_instr *jump = nir_instr_as_jump(last_instr);
+   if (jump->type != nir_jump_return)
+      return false;
+
+   nir_instr_remove(&jump->instr);
+
+   nir_builder *b = &state->builder;
+   b->cursor = nir_after_block(block);
+
+   /* Set the return flag */
+   if (state->return_flag == NULL) {
+      state->return_flag =
+         nir_local_variable_create(b->impl, glsl_bool_type(), "return");
+
+      /* Set a default value of false */
+      state->return_flag->constant_initializer =
+         rzalloc(state->return_flag, nir_constant);
+   }
+   nir_store_var(b, state->return_flag, nir_imm_int(b, NIR_TRUE), 1);
+
+   if (state->loop) {
+      /* We're in a loop;  we need to break out of it. */
+      nir_jump(b, nir_jump_break);
+   } else {
+      /* Not in a loop;  we'll deal with predicating later*/
+      assert(nir_cf_node_next(&block->cf_node) == NULL);
+   }
+
+   return true;
+}
+
+static bool
+lower_returns_in_cf_list(struct exec_list *cf_list,
+                         struct lower_returns_state *state)
+{
+   bool progress = false;
+
+   struct exec_list *parent_list = state->cf_list;
+   state->cf_list = cf_list;
+
+   /* We iterate over the list backwards because any given lower call may
+    * take everything following the given CF node and predicate it.  In
+    * order to avoid recursion/iteration problems, we want everything after
+    * a given node to already be lowered before this happens.
+    */
+   foreach_list_typed_reverse_safe(nir_cf_node, node, node, cf_list) {
+      switch (node->type) {
+      case nir_cf_node_block:
+         if (lower_returns_in_block(nir_cf_node_as_block(node), state))
+            progress = true;
+         break;
+
+      case nir_cf_node_if:
+         if (lower_returns_in_if(nir_cf_node_as_if(node), state))
+            progress = true;
+         break;
+
+      case nir_cf_node_loop:
+         if (lower_returns_in_loop(nir_cf_node_as_loop(node), state))
+            progress = true;
+         break;
+
+      default:
+         unreachable("Invalid inner CF node type");
+      }
+   }
+
+   state->cf_list = parent_list;
+
+   return progress;
+}
+
+bool
+nir_lower_returns_impl(nir_function_impl *impl)
+{
+   struct lower_returns_state state;
+
+   state.cf_list = &impl->body;
+   state.loop = NULL;
+   state.return_flag = NULL;
+   nir_builder_init(&state.builder, impl);
+
+   bool progress = lower_returns_in_cf_list(&impl->body, &state);
+
+   if (progress) {
+      nir_metadata_preserve(impl, nir_metadata_none);
+      nir_repair_ssa_impl(impl);
+   }
+
+   return progress;
+}
+
+bool
+nir_lower_returns(nir_shader *shader)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         progress = nir_lower_returns_impl(function->impl) || progress;
+   }
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_lower_samplers.c b/src/compiler/nir/nir_lower_samplers.c
new file mode 100644
index 00000000000..29654136aee
--- /dev/null
+++ b/src/compiler/nir/nir_lower_samplers.c
@@ -0,0 +1,198 @@
+/*
+ * Copyright (C) 2005-2007  Brian Paul   All Rights Reserved.
+ * Copyright (C) 2008  VMware, Inc.   All Rights Reserved.
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+#include "program/hash_table.h"
+#include "compiler/glsl/ir_uniform.h"
+
+#include "main/compiler.h"
+#include "main/mtypes.h"
+#include "program/prog_parameter.h"
+#include "program/program.h"
+
+/* Calculate the sampler index based on array indicies and also
+ * calculate the base uniform location for struct members.
+ */
+static void
+calc_sampler_offsets(nir_deref *tail, nir_tex_instr *instr,
+                     unsigned *array_elements, nir_ssa_def **indirect,
+                     nir_builder *b, unsigned *location)
+{
+   if (tail->child == NULL)
+      return;
+
+   switch (tail->child->deref_type) {
+   case nir_deref_type_array: {
+      nir_deref_array *deref_array = nir_deref_as_array(tail->child);
+
+      assert(deref_array->deref_array_type != nir_deref_array_type_wildcard);
+
+      calc_sampler_offsets(tail->child, instr, array_elements,
+                           indirect, b, location);
+      instr->sampler_index += deref_array->base_offset * *array_elements;
+
+      if (deref_array->deref_array_type == nir_deref_array_type_indirect) {
+         nir_ssa_def *mul =
+            nir_imul(b, nir_imm_int(b, *array_elements),
+                     nir_ssa_for_src(b, deref_array->indirect, 1));
+
+         nir_instr_rewrite_src(&instr->instr, &deref_array->indirect,
+                               NIR_SRC_INIT);
+
+         if (*indirect) {
+            *indirect = nir_iadd(b, *indirect, mul);
+         } else {
+            *indirect = mul;
+         }
+      }
+
+      *array_elements *= glsl_get_length(tail->type);
+       break;
+   }
+
+   case nir_deref_type_struct: {
+      nir_deref_struct *deref_struct = nir_deref_as_struct(tail->child);
+      *location += glsl_get_record_location_offset(tail->type, deref_struct->index);
+      calc_sampler_offsets(tail->child, instr, array_elements,
+                           indirect, b, location);
+      break;
+   }
+
+   default:
+      unreachable("Invalid deref type");
+      break;
+   }
+}
+
+static void
+lower_sampler(nir_tex_instr *instr, const struct gl_shader_program *shader_program,
+              gl_shader_stage stage, nir_builder *builder)
+{
+   if (instr->sampler == NULL)
+      return;
+
+   /* GLSL only has combined textures/samplers */
+   assert(instr->texture == NULL);
+
+   instr->sampler_index = 0;
+   unsigned location = instr->sampler->var->data.location;
+   unsigned array_elements = 1;
+   nir_ssa_def *indirect = NULL;
+
+   builder->cursor = nir_before_instr(&instr->instr);
+   calc_sampler_offsets(&instr->sampler->deref, instr, &array_elements,
+                        &indirect, builder, &location);
+
+   if (indirect) {
+      /* First, we have to resize the array of texture sources */
+      nir_tex_src *new_srcs = rzalloc_array(instr, nir_tex_src,
+                                            instr->num_srcs + 2);
+
+      for (unsigned i = 0; i < instr->num_srcs; i++) {
+         new_srcs[i].src_type = instr->src[i].src_type;
+         nir_instr_move_src(&instr->instr, &new_srcs[i].src,
+                            &instr->src[i].src);
+      }
+
+      ralloc_free(instr->src);
+      instr->src = new_srcs;
+
+      /* Now we can go ahead and move the source over to being a
+       * first-class texture source.
+       */
+      instr->src[instr->num_srcs].src_type = nir_tex_src_texture_offset;
+      instr->num_srcs++;
+      nir_instr_rewrite_src(&instr->instr,
+                            &instr->src[instr->num_srcs - 1].src,
+                            nir_src_for_ssa(indirect));
+
+      instr->src[instr->num_srcs].src_type = nir_tex_src_sampler_offset;
+      instr->num_srcs++;
+      nir_instr_rewrite_src(&instr->instr,
+                            &instr->src[instr->num_srcs - 1].src,
+                            nir_src_for_ssa(indirect));
+
+      instr->texture_array_size = array_elements;
+   }
+
+   if (location > shader_program->NumUniformStorage - 1 ||
+       !shader_program->UniformStorage[location].opaque[stage].active) {
+      assert(!"cannot return a sampler");
+      return;
+   }
+
+   instr->sampler_index +=
+      shader_program->UniformStorage[location].opaque[stage].index;
+
+   instr->sampler = NULL;
+
+   instr->texture_index = instr->sampler_index;
+}
+
+typedef struct {
+   nir_builder builder;
+   const struct gl_shader_program *shader_program;
+   gl_shader_stage stage;
+} lower_state;
+
+static bool
+lower_block_cb(nir_block *block, void *_state)
+{
+   lower_state *state = (lower_state *) _state;
+
+   nir_foreach_instr(block, instr) {
+      if (instr->type == nir_instr_type_tex) {
+         nir_tex_instr *tex_instr = nir_instr_as_tex(instr);
+         lower_sampler(tex_instr, state->shader_program, state->stage,
+                       &state->builder);
+      }
+   }
+
+   return true;
+}
+
+static void
+lower_impl(nir_function_impl *impl, const struct gl_shader_program *shader_program,
+           gl_shader_stage stage)
+{
+   lower_state state;
+
+   nir_builder_init(&state.builder, impl);
+   state.shader_program = shader_program;
+   state.stage = stage;
+
+   nir_foreach_block(impl, lower_block_cb, &state);
+}
+
+void
+nir_lower_samplers(nir_shader *shader,
+                   const struct gl_shader_program *shader_program)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         lower_impl(function->impl, shader_program, shader->stage);
+   }
+}
diff --git a/src/compiler/nir/nir_lower_system_values.c b/src/compiler/nir/nir_lower_system_values.c
new file mode 100644
index 00000000000..79f6bedc990
--- /dev/null
+++ b/src/compiler/nir/nir_lower_system_values.c
@@ -0,0 +1,166 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+
+struct lower_system_values_state {
+   nir_builder builder;
+   bool progress;
+};
+
+static bool
+convert_block(nir_block *block, void *void_state)
+{
+   struct lower_system_values_state *state = void_state;
+
+   nir_builder *b = &state->builder;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_intrinsic)
+         continue;
+
+      nir_intrinsic_instr *load_var = nir_instr_as_intrinsic(instr);
+
+      if (load_var->intrinsic != nir_intrinsic_load_var)
+         continue;
+
+      nir_variable *var = load_var->variables[0]->var;
+      if (var->data.mode != nir_var_system_value)
+         continue;
+
+      b->cursor = nir_after_instr(&load_var->instr);
+
+      nir_ssa_def *sysval;
+      switch (var->data.location) {
+      case SYSTEM_VALUE_GLOBAL_INVOCATION_ID: {
+         /* From the GLSL man page for gl_GlobalInvocationID:
+          *
+          *    "The value of gl_GlobalInvocationID is equal to
+          *    gl_WorkGroupID * gl_WorkGroupSize + gl_LocalInvocationID"
+          */
+
+         nir_const_value local_size;
+         local_size.u[0] = b->shader->info.cs.local_size[0];
+         local_size.u[1] = b->shader->info.cs.local_size[1];
+         local_size.u[2] = b->shader->info.cs.local_size[2];
+
+         nir_ssa_def *group_id =
+            nir_load_system_value(b, nir_intrinsic_load_work_group_id, 0);
+         nir_ssa_def *local_id =
+            nir_load_system_value(b, nir_intrinsic_load_local_invocation_id, 0);
+
+         sysval = nir_iadd(b, nir_imul(b, group_id,
+                                          nir_build_imm(b, 3, local_size)),
+                              local_id);
+         break;
+      }
+
+      case SYSTEM_VALUE_LOCAL_INVOCATION_INDEX: {
+         /* From the GLSL man page for gl_LocalInvocationIndex:
+          *
+          *    ?The value of gl_LocalInvocationIndex is equal to
+          *    gl_LocalInvocationID.z * gl_WorkGroupSize.x *
+          *    gl_WorkGroupSize.y + gl_LocalInvocationID.y *
+          *    gl_WorkGroupSize.x + gl_LocalInvocationID.x"
+          */
+         nir_ssa_def *local_id =
+            nir_load_system_value(b, nir_intrinsic_load_local_invocation_id, 0);
+
+         unsigned stride_y = b->shader->info.cs.local_size[0];
+         unsigned stride_z = b->shader->info.cs.local_size[0] *
+                             b->shader->info.cs.local_size[1];
+
+         sysval = nir_iadd(b, nir_imul(b, nir_channel(b, local_id, 2),
+                                          nir_imm_int(b, stride_z)),
+                              nir_iadd(b, nir_imul(b, nir_channel(b, local_id, 1),
+                                                      nir_imm_int(b, stride_y)),
+                                          nir_channel(b, local_id, 0)));
+         break;
+      }
+
+      case SYSTEM_VALUE_VERTEX_ID:
+         if (b->shader->options->vertex_id_zero_based) {
+            sysval = nir_iadd(b,
+               nir_load_system_value(b, nir_intrinsic_load_vertex_id_zero_base, 0),
+               nir_load_system_value(b, nir_intrinsic_load_base_vertex, 0));
+         } else {
+            sysval = nir_load_system_value(b, nir_intrinsic_load_vertex_id, 0);
+         }
+         break;
+
+      case SYSTEM_VALUE_INSTANCE_INDEX:
+         sysval = nir_iadd(b,
+            nir_load_system_value(b, nir_intrinsic_load_instance_id, 0),
+            nir_load_system_value(b, nir_intrinsic_load_base_instance, 0));
+         break;
+
+      default: {
+         nir_intrinsic_op sysval_op =
+            nir_intrinsic_from_system_value(var->data.location);
+         sysval = nir_load_system_value(b, sysval_op, 0);
+         break;
+      } /* default */
+      }
+
+      nir_ssa_def_rewrite_uses(&load_var->dest.ssa, nir_src_for_ssa(sysval));
+      nir_instr_remove(&load_var->instr);
+
+      state->progress = true;
+   }
+
+   return true;
+}
+
+static bool
+convert_impl(nir_function_impl *impl)
+{
+   struct lower_system_values_state state;
+
+   state.progress = false;
+   nir_builder_init(&state.builder, impl);
+
+   nir_foreach_block(impl, convert_block, &state);
+   nir_metadata_preserve(impl, nir_metadata_block_index |
+                               nir_metadata_dominance);
+   return state.progress;
+}
+
+bool
+nir_lower_system_values(nir_shader *shader)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         progress = convert_impl(function->impl) || progress;
+   }
+
+   exec_list_make_empty(&shader->system_values);
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_lower_tex.c b/src/compiler/nir/nir_lower_tex.c
new file mode 100644
index 00000000000..ae24fb2e16a
--- /dev/null
+++ b/src/compiler/nir/nir_lower_tex.c
@@ -0,0 +1,355 @@
+/*
+ * Copyright © 2015 Broadcom
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+/*
+ * This lowering pass supports (as configured via nir_lower_tex_options)
+ * various texture related conversions:
+ *   + texture projector lowering: converts the coordinate division for
+ *     texture projection to be done in ALU instructions instead of
+ *     asking the texture operation to do so.
+ *   + lowering RECT: converts the un-normalized RECT texture coordinates
+ *     to normalized coordinates with txs plus ALU instructions
+ *   + saturate s/t/r coords: to emulate certain texture clamp/wrap modes,
+ *     inserts instructions to clamp specified coordinates to [0.0, 1.0].
+ *     Note that this automatically triggers texture projector lowering if
+ *     needed, since clamping must happen after projector lowering.
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+
+typedef struct {
+   nir_builder b;
+   const nir_lower_tex_options *options;
+   bool progress;
+} lower_tex_state;
+
+static void
+project_src(nir_builder *b, nir_tex_instr *tex)
+{
+   /* Find the projector in the srcs list, if present. */
+   unsigned proj_index;
+   for (proj_index = 0; proj_index < tex->num_srcs; proj_index++) {
+      if (tex->src[proj_index].src_type == nir_tex_src_projector)
+         break;
+   }
+   if (proj_index == tex->num_srcs)
+      return;
+
+   b->cursor = nir_before_instr(&tex->instr);
+
+   nir_ssa_def *inv_proj =
+      nir_frcp(b, nir_ssa_for_src(b, tex->src[proj_index].src, 1));
+
+   /* Walk through the sources projecting the arguments. */
+   for (unsigned i = 0; i < tex->num_srcs; i++) {
+      switch (tex->src[i].src_type) {
+      case nir_tex_src_coord:
+      case nir_tex_src_comparitor:
+         break;
+      default:
+         continue;
+      }
+      nir_ssa_def *unprojected =
+         nir_ssa_for_src(b, tex->src[i].src, nir_tex_instr_src_size(tex, i));
+      nir_ssa_def *projected = nir_fmul(b, unprojected, inv_proj);
+
+      /* Array indices don't get projected, so make an new vector with the
+       * coordinate's array index untouched.
+       */
+      if (tex->is_array && tex->src[i].src_type == nir_tex_src_coord) {
+         switch (tex->coord_components) {
+         case 4:
+            projected = nir_vec4(b,
+                                 nir_channel(b, projected, 0),
+                                 nir_channel(b, projected, 1),
+                                 nir_channel(b, projected, 2),
+                                 nir_channel(b, unprojected, 3));
+            break;
+         case 3:
+            projected = nir_vec3(b,
+                                 nir_channel(b, projected, 0),
+                                 nir_channel(b, projected, 1),
+                                 nir_channel(b, unprojected, 2));
+            break;
+         case 2:
+            projected = nir_vec2(b,
+                                 nir_channel(b, projected, 0),
+                                 nir_channel(b, unprojected, 1));
+            break;
+         default:
+            unreachable("bad texture coord count for array");
+            break;
+         }
+      }
+
+      nir_instr_rewrite_src(&tex->instr,
+                            &tex->src[i].src,
+                            nir_src_for_ssa(projected));
+   }
+
+   /* Now move the later tex sources down the array so that the projector
+    * disappears.
+    */
+   nir_instr_rewrite_src(&tex->instr, &tex->src[proj_index].src,
+                         NIR_SRC_INIT);
+   for (unsigned i = proj_index + 1; i < tex->num_srcs; i++) {
+      tex->src[i-1].src_type = tex->src[i].src_type;
+      nir_instr_move_src(&tex->instr, &tex->src[i-1].src, &tex->src[i].src);
+   }
+   tex->num_srcs--;
+}
+
+static nir_ssa_def *
+get_texture_size(nir_builder *b, nir_tex_instr *tex)
+{
+   b->cursor = nir_before_instr(&tex->instr);
+
+   /* RECT textures should not be array: */
+   assert(!tex->is_array);
+
+   nir_tex_instr *txs;
+
+   txs = nir_tex_instr_create(b->shader, 1);
+   txs->op = nir_texop_txs;
+   txs->sampler_dim = GLSL_SAMPLER_DIM_RECT;
+   txs->sampler_index = tex->sampler_index;
+   txs->dest_type = nir_type_int;
+
+   /* only single src, the lod: */
+   txs->src[0].src = nir_src_for_ssa(nir_imm_int(b, 0));
+   txs->src[0].src_type = nir_tex_src_lod;
+
+   nir_ssa_dest_init(&txs->instr, &txs->dest, 2, NULL);
+   nir_builder_instr_insert(b, &txs->instr);
+
+   return nir_i2f(b, &txs->dest.ssa);
+}
+
+static void
+lower_rect(nir_builder *b, nir_tex_instr *tex)
+{
+   nir_ssa_def *txs = get_texture_size(b, tex);
+   nir_ssa_def *scale = nir_frcp(b, txs);
+
+   /* Walk through the sources normalizing the requested arguments. */
+   for (unsigned i = 0; i < tex->num_srcs; i++) {
+      if (tex->src[i].src_type != nir_tex_src_coord)
+         continue;
+
+      nir_ssa_def *coords =
+         nir_ssa_for_src(b, tex->src[i].src, tex->coord_components);
+      nir_instr_rewrite_src(&tex->instr,
+                            &tex->src[i].src,
+                            nir_src_for_ssa(nir_fmul(b, coords, scale)));
+   }
+
+   tex->sampler_dim = GLSL_SAMPLER_DIM_2D;
+}
+
+static void
+saturate_src(nir_builder *b, nir_tex_instr *tex, unsigned sat_mask)
+{
+   b->cursor = nir_before_instr(&tex->instr);
+
+   /* Walk through the sources saturating the requested arguments. */
+   for (unsigned i = 0; i < tex->num_srcs; i++) {
+      if (tex->src[i].src_type != nir_tex_src_coord)
+         continue;
+
+      nir_ssa_def *src =
+         nir_ssa_for_src(b, tex->src[i].src, tex->coord_components);
+
+      /* split src into components: */
+      nir_ssa_def *comp[4];
+
+      for (unsigned j = 0; j < tex->coord_components; j++)
+         comp[j] = nir_channel(b, src, j);
+
+      /* clamp requested components, array index does not get clamped: */
+      unsigned ncomp = tex->coord_components;
+      if (tex->is_array)
+         ncomp--;
+
+      for (unsigned j = 0; j < ncomp; j++) {
+         if ((1 << j) & sat_mask) {
+            if (tex->sampler_dim == GLSL_SAMPLER_DIM_RECT) {
+               /* non-normalized texture coords, so clamp to texture
+                * size rather than [0.0, 1.0]
+                */
+               nir_ssa_def *txs = get_texture_size(b, tex);
+               comp[j] = nir_fmax(b, comp[j], nir_imm_float(b, 0.0));
+               comp[j] = nir_fmin(b, comp[j], nir_channel(b, txs, j));
+            } else {
+               comp[j] = nir_fsat(b, comp[j]);
+            }
+         }
+      }
+
+      /* and move the result back into a single vecN: */
+      src = nir_vec(b, comp, tex->coord_components);
+
+      nir_instr_rewrite_src(&tex->instr,
+                            &tex->src[i].src,
+                            nir_src_for_ssa(src));
+   }
+}
+
+static nir_ssa_def *
+get_zero_or_one(nir_builder *b, nir_alu_type type, uint8_t swizzle_val)
+{
+   nir_const_value v;
+
+   memset(&v, 0, sizeof(v));
+
+   if (swizzle_val == 4) {
+      v.u[0] = v.u[1] = v.u[2] = v.u[3] = 0;
+   } else {
+      assert(swizzle_val == 5);
+      if (type == nir_type_float)
+         v.f[0] = v.f[1] = v.f[2] = v.f[3] = 1.0;
+      else
+         v.u[0] = v.u[1] = v.u[2] = v.u[3] = 1;
+   }
+
+   return nir_build_imm(b, 4, v);
+}
+
+static void
+swizzle_result(nir_builder *b, nir_tex_instr *tex, const uint8_t swizzle[4])
+{
+   assert(tex->dest.is_ssa);
+
+   b->cursor = nir_after_instr(&tex->instr);
+
+   nir_ssa_def *swizzled;
+   if (tex->op == nir_texop_tg4) {
+      if (swizzle[tex->component] < 4) {
+         /* This one's easy */
+         tex->component = swizzle[tex->component];
+         return;
+      } else {
+         swizzled = get_zero_or_one(b, tex->dest_type, swizzle[tex->component]);
+      }
+   } else {
+      assert(nir_tex_instr_dest_size(tex) == 4);
+      if (swizzle[0] < 4 && swizzle[1] < 4 &&
+          swizzle[2] < 4 && swizzle[3] < 4) {
+         unsigned swiz[4] = { swizzle[0], swizzle[1], swizzle[2], swizzle[3] };
+         /* We have no 0's or 1's, just emit a swizzling MOV */
+         swizzled = nir_swizzle(b, &tex->dest.ssa, swiz, 4, false);
+      } else {
+         nir_ssa_def *srcs[4];
+         for (unsigned i = 0; i < 4; i++) {
+            if (swizzle[i] < 4) {
+               srcs[i] = nir_channel(b, &tex->dest.ssa, swizzle[i]);
+            } else {
+               srcs[i] = get_zero_or_one(b, tex->dest_type, swizzle[i]);
+            }
+         }
+         swizzled = nir_vec(b, srcs, 4);
+      }
+   }
+
+   nir_ssa_def_rewrite_uses_after(&tex->dest.ssa, nir_src_for_ssa(swizzled),
+                                  swizzled->parent_instr);
+}
+
+static bool
+nir_lower_tex_block(nir_block *block, void *void_state)
+{
+   lower_tex_state *state = void_state;
+   nir_builder *b = &state->b;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_tex)
+         continue;
+
+      nir_tex_instr *tex = nir_instr_as_tex(instr);
+      bool lower_txp = !!(state->options->lower_txp & (1 << tex->sampler_dim));
+
+      /* mask of src coords to saturate (clamp): */
+      unsigned sat_mask = 0;
+
+      if ((1 << tex->sampler_index) & state->options->saturate_r)
+         sat_mask |= (1 << 2);    /* .z */
+      if ((1 << tex->sampler_index) & state->options->saturate_t)
+         sat_mask |= (1 << 1);    /* .y */
+      if ((1 << tex->sampler_index) & state->options->saturate_s)
+         sat_mask |= (1 << 0);    /* .x */
+
+      /* If we are clamping any coords, we must lower projector first
+       * as clamping happens *after* projection:
+       */
+      if (lower_txp || sat_mask) {
+         project_src(b, tex);
+         state->progress = true;
+      }
+
+      if ((tex->sampler_dim == GLSL_SAMPLER_DIM_RECT) &&
+          state->options->lower_rect) {
+         lower_rect(b, tex);
+         state->progress = true;
+      }
+
+      if (sat_mask) {
+         saturate_src(b, tex, sat_mask);
+         state->progress = true;
+      }
+
+      if (((1 << tex->sampler_index) & state->options->swizzle_result) &&
+          !nir_tex_instr_is_query(tex) &&
+          !(tex->is_shadow && tex->is_new_style_shadow)) {
+         swizzle_result(b, tex, state->options->swizzles[tex->sampler_index]);
+         state->progress = true;
+      }
+   }
+
+   return true;
+}
+
+static void
+nir_lower_tex_impl(nir_function_impl *impl, lower_tex_state *state)
+{
+   nir_builder_init(&state->b, impl);
+
+   nir_foreach_block(impl, nir_lower_tex_block, state);
+
+   nir_metadata_preserve(impl, nir_metadata_block_index |
+                               nir_metadata_dominance);
+}
+
+bool
+nir_lower_tex(nir_shader *shader, const nir_lower_tex_options *options)
+{
+   lower_tex_state state;
+   state.options = options;
+   state.progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         nir_lower_tex_impl(function->impl, &state);
+   }
+
+   return state.progress;
+}
diff --git a/src/compiler/nir/nir_lower_to_source_mods.c b/src/compiler/nir/nir_lower_to_source_mods.c
new file mode 100644
index 00000000000..6c4e1f0d3f3
--- /dev/null
+++ b/src/compiler/nir/nir_lower_to_source_mods.c
@@ -0,0 +1,196 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir.h"
+
+/*
+ * This pass lowers the neg, abs, and sat operations to source modifiers on
+ * ALU operations to make things nicer for the backend.  It's just much
+ * easier to not have them when we're doing optimizations.
+ */
+
+static bool
+nir_lower_to_source_mods_block(nir_block *block, void *state)
+{
+   nir_foreach_instr(block, instr) {
+      if (instr->type != nir_instr_type_alu)
+         continue;
+
+      nir_alu_instr *alu = nir_instr_as_alu(instr);
+
+      for (unsigned i = 0; i < nir_op_infos[alu->op].num_inputs; i++) {
+         if (!alu->src[i].src.is_ssa)
+            continue;
+
+         if (alu->src[i].src.ssa->parent_instr->type != nir_instr_type_alu)
+            continue;
+
+         nir_alu_instr *parent = nir_instr_as_alu(alu->src[i].src.ssa->parent_instr);
+
+         if (parent->dest.saturate)
+            continue;
+
+         switch (nir_op_infos[alu->op].input_types[i]) {
+         case nir_type_float:
+            if (parent->op != nir_op_fmov)
+               continue;
+            break;
+         case nir_type_int:
+            if (parent->op != nir_op_imov)
+               continue;
+            break;
+         default:
+            continue;
+         }
+
+         /* We can only do a rewrite if the source we are copying is SSA.
+          * Otherwise, moving the read might invalidly reorder reads/writes
+          * on a register.
+          */
+         if (!parent->src[0].src.is_ssa)
+            continue;
+
+         nir_instr_rewrite_src(instr, &alu->src[i].src, parent->src[0].src);
+         if (alu->src[i].abs) {
+            /* abs trumps both neg and abs, do nothing */
+         } else {
+            alu->src[i].negate = (alu->src[i].negate != parent->src[0].negate);
+            alu->src[i].abs |= parent->src[0].abs;
+         }
+
+         for (int j = 0; j < 4; ++j) {
+            if (!nir_alu_instr_channel_used(alu, i, j))
+               continue;
+            alu->src[i].swizzle[j] = parent->src[0].swizzle[alu->src[i].swizzle[j]];
+         }
+
+         if (list_empty(&parent->dest.dest.ssa.uses) &&
+             list_empty(&parent->dest.dest.ssa.if_uses))
+            nir_instr_remove(&parent->instr);
+      }
+
+      switch (alu->op) {
+      case nir_op_fsat:
+         alu->op = nir_op_fmov;
+         alu->dest.saturate = true;
+         break;
+      case nir_op_ineg:
+         alu->op = nir_op_imov;
+         alu->src[0].negate = !alu->src[0].negate;
+         break;
+      case nir_op_fneg:
+         alu->op = nir_op_fmov;
+         alu->src[0].negate = !alu->src[0].negate;
+         break;
+      case nir_op_iabs:
+         alu->op = nir_op_imov;
+         alu->src[0].abs = true;
+         alu->src[0].negate = false;
+         break;
+      case nir_op_fabs:
+         alu->op = nir_op_fmov;
+         alu->src[0].abs = true;
+         alu->src[0].negate = false;
+         break;
+      default:
+         break;
+      }
+
+      /* We've covered sources.  Now we're going to try and saturate the
+       * destination if we can.
+       */
+
+      if (!alu->dest.dest.is_ssa)
+         continue;
+
+      /* We can only saturate float destinations */
+      if (nir_op_infos[alu->op].output_type != nir_type_float)
+         continue;
+
+      if (!list_empty(&alu->dest.dest.ssa.if_uses))
+         continue;
+
+      bool all_children_are_sat = true;
+      nir_foreach_use(&alu->dest.dest.ssa, child_src) {
+         assert(child_src->is_ssa);
+         nir_instr *child = child_src->parent_instr;
+         if (child->type != nir_instr_type_alu) {
+            all_children_are_sat = false;
+            continue;
+         }
+
+         nir_alu_instr *child_alu = nir_instr_as_alu(child);
+         if (child_alu->src[0].negate || child_alu->src[0].abs) {
+            all_children_are_sat = false;
+            continue;
+         }
+
+         if (child_alu->op != nir_op_fsat &&
+             !(child_alu->op == nir_op_fmov && child_alu->dest.saturate)) {
+            all_children_are_sat = false;
+            continue;
+         }
+      }
+
+      if (!all_children_are_sat)
+         continue;
+
+      alu->dest.saturate = true;
+
+      nir_foreach_use(&alu->dest.dest.ssa, child_src) {
+         assert(child_src->is_ssa);
+         nir_instr *child = child_src->parent_instr;
+         assert(child->type == nir_instr_type_alu);
+         nir_alu_instr *child_alu = nir_instr_as_alu(child);
+
+         child_alu->op = nir_op_fmov;
+         child_alu->dest.saturate = false;
+         /* We could propagate the dest of our instruction to the
+          * destinations of the uses here.  However, one quick round of
+          * copy propagation will clean that all up and then we don't have
+          * the complexity.
+          */
+      }
+   }
+
+   return true;
+}
+
+static void
+nir_lower_to_source_mods_impl(nir_function_impl *impl)
+{
+   nir_foreach_block(impl, nir_lower_to_source_mods_block, NULL);
+}
+
+void
+nir_lower_to_source_mods(nir_shader *shader)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         nir_lower_to_source_mods_impl(function->impl);
+   }
+}
diff --git a/src/compiler/nir/nir_lower_two_sided_color.c b/src/compiler/nir/nir_lower_two_sided_color.c
new file mode 100644
index 00000000000..1294cb89004
--- /dev/null
+++ b/src/compiler/nir/nir_lower_two_sided_color.c
@@ -0,0 +1,212 @@
+/*
+ * Copyright © 2015 Red Hat
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Rob Clark <[email protected]>
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+
+#define MAX_COLORS 2  /* VARYING_SLOT_COL0/COL1 */
+
+typedef struct {
+   nir_builder   b;
+   nir_shader   *shader;
+   nir_variable *face;
+   struct {
+      nir_variable *front;        /* COLn */
+      nir_variable *back;         /* BFCn */
+   } colors[MAX_COLORS];
+   int colors_count;
+} lower_2side_state;
+
+
+/* Lowering pass for fragment shaders to emulated two-sided-color.  For
+ * each COLOR input, a corresponding BCOLOR input is created, and bcsel
+ * instruction used to select front or back color based on FACE.
+ */
+
+static nir_variable *
+create_input(nir_shader *shader, unsigned drvloc, gl_varying_slot slot)
+{
+   nir_variable *var = rzalloc(shader, nir_variable);
+
+   var->data.driver_location = drvloc;
+   var->type = glsl_vec4_type();
+   var->data.mode = nir_var_shader_in;
+   var->name = ralloc_asprintf(var, "in_%d", drvloc);
+   var->data.index = 0;
+   var->data.location = slot;
+
+   exec_list_push_tail(&shader->inputs, &var->node);
+
+   shader->num_inputs++;     /* TODO use type_size() */
+
+   return var;
+}
+
+static nir_ssa_def *
+load_input(nir_builder *b, nir_variable *in)
+{
+   nir_intrinsic_instr *load;
+
+   load = nir_intrinsic_instr_create(b->shader, nir_intrinsic_load_input);
+   load->num_components = 4;
+   load->const_index[0] = in->data.driver_location;
+   load->src[0] = nir_src_for_ssa(nir_imm_int(b, 0));
+   nir_ssa_dest_init(&load->instr, &load->dest, 4, NULL);
+   nir_builder_instr_insert(b, &load->instr);
+
+   return &load->dest.ssa;
+}
+
+static int
+setup_inputs(lower_2side_state *state)
+{
+   int maxloc = -1;
+
+   /* find color/face inputs: */
+   nir_foreach_variable(var, &state->shader->inputs) {
+      int loc = var->data.driver_location;
+
+      /* keep track of last used driver-location.. we'll be
+       * appending BCLr/FACE after last existing input:
+       */
+      maxloc = MAX2(maxloc, loc);
+
+      switch (var->data.location) {
+      case VARYING_SLOT_COL0:
+      case VARYING_SLOT_COL1:
+         assert(state->colors_count < ARRAY_SIZE(state->colors));
+         state->colors[state->colors_count].front = var;
+         state->colors_count++;
+         break;
+      case VARYING_SLOT_FACE:
+         state->face = var;
+         break;
+      }
+   }
+
+   /* if we don't have any color inputs, nothing to do: */
+   if (state->colors_count == 0)
+      return -1;
+
+   /* if we don't already have one, insert a FACE input: */
+   if (!state->face) {
+      state->face = create_input(state->shader, ++maxloc, VARYING_SLOT_FACE);
+      state->face->data.interpolation = INTERP_QUALIFIER_FLAT;
+   }
+
+   /* add required back-face color inputs: */
+   for (int i = 0; i < state->colors_count; i++) {
+      gl_varying_slot slot;
+
+      if (state->colors[i].front->data.location == VARYING_SLOT_COL0)
+         slot = VARYING_SLOT_BFC0;
+      else
+         slot = VARYING_SLOT_BFC1;
+
+      state->colors[i].back = create_input(state->shader, ++maxloc, slot);
+   }
+
+   return 0;
+}
+
+static bool
+nir_lower_two_sided_color_block(nir_block *block, void *void_state)
+{
+   lower_2side_state *state = void_state;
+   nir_builder *b = &state->b;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_intrinsic)
+         continue;
+
+      nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
+
+      if (intr->intrinsic != nir_intrinsic_load_input)
+         continue;
+
+      int idx;
+      for (idx = 0; idx < state->colors_count; idx++) {
+         unsigned drvloc =
+            state->colors[idx].front->data.driver_location;
+         if (intr->const_index[0] == drvloc) {
+            assert(nir_src_as_const_value(intr->src[0]));
+            break;
+         }
+      }
+
+      if (idx == state->colors_count)
+         continue;
+
+      /* replace load_input(COLn) with
+       * bcsel(load_input(FACE), load_input(COLn), load_input(BFCn))
+       */
+      b->cursor = nir_before_instr(&intr->instr);
+      nir_ssa_def *face  = nir_channel(b, load_input(b, state->face), 0);
+      nir_ssa_def *front = load_input(b, state->colors[idx].front);
+      nir_ssa_def *back  = load_input(b, state->colors[idx].back);
+      nir_ssa_def *cond  = nir_flt(b, face, nir_imm_float(b, 0.0));
+      nir_ssa_def *color = nir_bcsel(b, cond, back, front);
+
+      assert(intr->dest.is_ssa);
+      nir_ssa_def_rewrite_uses(&intr->dest.ssa, nir_src_for_ssa(color));
+   }
+
+   return true;
+}
+
+static void
+nir_lower_two_sided_color_impl(nir_function_impl *impl,
+                               lower_2side_state *state)
+{
+   nir_builder *b = &state->b;
+
+   nir_builder_init(b, impl);
+
+   nir_foreach_block(impl, nir_lower_two_sided_color_block, state);
+
+   nir_metadata_preserve(impl, nir_metadata_block_index |
+                               nir_metadata_dominance);
+}
+
+void
+nir_lower_two_sided_color(nir_shader *shader)
+{
+   lower_2side_state state = {
+      .shader = shader,
+   };
+
+   if (shader->stage != MESA_SHADER_FRAGMENT)
+      return;
+
+   if (setup_inputs(&state) != 0)
+      return;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         nir_lower_two_sided_color_impl(function->impl, &state);
+   }
+
+}
diff --git a/src/compiler/nir/nir_lower_var_copies.c b/src/compiler/nir/nir_lower_var_copies.c
new file mode 100644
index 00000000000..8cb3edd0a84
--- /dev/null
+++ b/src/compiler/nir/nir_lower_var_copies.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir.h"
+#include "compiler/nir_types.h"
+
+/*
+ * Lowers all copy intrinsics to sequences of load/store intrinsics.
+ */
+
+/* Walks down the deref chain and returns the next deref in the chain whose
+ * child is a wildcard.  In other words, given the chain  a[1].foo[*].bar,
+ * this function will return the deref to foo.  Calling it a second time
+ * with the [*].bar, it will return NULL.
+ */
+static nir_deref *
+deref_next_wildcard_parent(nir_deref *deref)
+{
+   for (nir_deref *tail = deref; tail->child; tail = tail->child) {
+      if (tail->child->deref_type != nir_deref_type_array)
+         continue;
+
+      nir_deref_array *arr = nir_deref_as_array(tail->child);
+
+      if (arr->deref_array_type == nir_deref_array_type_wildcard)
+         return tail;
+   }
+
+   return NULL;
+}
+
+/* This function recursively walks the given deref chain and replaces the
+ * given copy instruction with an equivalent sequence load/store
+ * operations.
+ *
+ * @copy_instr    The copy instruction to replace; new instructions will be
+ *                inserted before this one
+ *
+ * @dest_head     The head of the destination variable deref chain
+ *
+ * @src_head      The head of the source variable deref chain
+ *
+ * @dest_tail     The current tail of the destination variable deref chain;
+ *                this is used for recursion and external callers of this
+ *                function should call it with tail == head
+ *
+ * @src_tail      The current tail of the source variable deref chain;
+ *                this is used for recursion and external callers of this
+ *                function should call it with tail == head
+ *
+ * @state         The current variable lowering state
+ */
+static void
+emit_copy_load_store(nir_intrinsic_instr *copy_instr,
+                     nir_deref_var *dest_head, nir_deref_var *src_head,
+                     nir_deref *dest_tail, nir_deref *src_tail, void *mem_ctx)
+{
+   /* Find the next pair of wildcards */
+   nir_deref *src_arr_parent = deref_next_wildcard_parent(src_tail);
+   nir_deref *dest_arr_parent = deref_next_wildcard_parent(dest_tail);
+
+   if (src_arr_parent || dest_arr_parent) {
+      /* Wildcards had better come in matched pairs */
+      assert(dest_arr_parent && dest_arr_parent);
+
+      nir_deref_array *src_arr = nir_deref_as_array(src_arr_parent->child);
+      nir_deref_array *dest_arr = nir_deref_as_array(dest_arr_parent->child);
+
+      unsigned length = glsl_get_length(src_arr_parent->type);
+      /* The wildcards should represent the same number of elements */
+      assert(length == glsl_get_length(dest_arr_parent->type));
+      assert(length > 0);
+
+      /* Walk over all of the elements that this wildcard refers to and
+       * call emit_copy_load_store on each one of them */
+      src_arr->deref_array_type = nir_deref_array_type_direct;
+      dest_arr->deref_array_type = nir_deref_array_type_direct;
+      for (unsigned i = 0; i < length; i++) {
+         src_arr->base_offset = i;
+         dest_arr->base_offset = i;
+         emit_copy_load_store(copy_instr, dest_head, src_head,
+                              &dest_arr->deref, &src_arr->deref, mem_ctx);
+      }
+      src_arr->deref_array_type = nir_deref_array_type_wildcard;
+      dest_arr->deref_array_type = nir_deref_array_type_wildcard;
+   } else {
+      /* In this case, we have no wildcards anymore, so all we have to do
+       * is just emit the load and store operations. */
+      src_tail = nir_deref_tail(src_tail);
+      dest_tail = nir_deref_tail(dest_tail);
+
+      assert(src_tail->type == dest_tail->type);
+
+      unsigned num_components = glsl_get_vector_elements(src_tail->type);
+
+      nir_intrinsic_instr *load =
+         nir_intrinsic_instr_create(mem_ctx, nir_intrinsic_load_var);
+      load->num_components = num_components;
+      load->variables[0] = nir_deref_as_var(nir_copy_deref(load, &src_head->deref));
+      nir_ssa_dest_init(&load->instr, &load->dest, num_components, NULL);
+
+      nir_instr_insert_before(&copy_instr->instr, &load->instr);
+
+      nir_intrinsic_instr *store =
+         nir_intrinsic_instr_create(mem_ctx, nir_intrinsic_store_var);
+      store->num_components = num_components;
+      store->const_index[0] = (1 << num_components) - 1;
+      store->variables[0] = nir_deref_as_var(nir_copy_deref(store, &dest_head->deref));
+
+      store->src[0].is_ssa = true;
+      store->src[0].ssa = &load->dest.ssa;
+
+      nir_instr_insert_before(&copy_instr->instr, &store->instr);
+   }
+}
+
+/* Lowers a copy instruction to a sequence of load/store instructions
+ *
+ * The new instructions are placed before the copy instruction in the IR.
+ */
+void
+nir_lower_var_copy_instr(nir_intrinsic_instr *copy, void *mem_ctx)
+{
+   assert(copy->intrinsic == nir_intrinsic_copy_var);
+   emit_copy_load_store(copy, copy->variables[0], copy->variables[1],
+                        &copy->variables[0]->deref,
+                        &copy->variables[1]->deref, mem_ctx);
+}
+
+static bool
+lower_var_copies_block(nir_block *block, void *mem_ctx)
+{
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_intrinsic)
+         continue;
+
+      nir_intrinsic_instr *copy = nir_instr_as_intrinsic(instr);
+      if (copy->intrinsic != nir_intrinsic_copy_var)
+         continue;
+
+      nir_lower_var_copy_instr(copy, mem_ctx);
+
+      nir_instr_remove(&copy->instr);
+      ralloc_free(copy);
+   }
+
+   return true;
+}
+
+static void
+lower_var_copies_impl(nir_function_impl *impl)
+{
+   nir_foreach_block(impl, lower_var_copies_block, ralloc_parent(impl));
+}
+
+/* Lowers every copy_var instruction in the program to a sequence of
+ * load/store instructions.
+ */
+void
+nir_lower_var_copies(nir_shader *shader)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         lower_var_copies_impl(function->impl);
+   }
+}
diff --git a/src/compiler/nir/nir_lower_vars_to_ssa.c b/src/compiler/nir/nir_lower_vars_to_ssa.c
new file mode 100644
index 00000000000..e1f368d2f2b
--- /dev/null
+++ b/src/compiler/nir/nir_lower_vars_to_ssa.c
@@ -0,0 +1,751 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+#include "nir_phi_builder.h"
+#include "nir_vla.h"
+
+
+struct deref_node {
+   struct deref_node *parent;
+   const struct glsl_type *type;
+
+   bool lower_to_ssa;
+
+   /* Only valid for things that end up in the direct list.
+    * Note that multiple nir_deref_vars may correspond to this node, but they
+    * will all be equivalent, so any is as good as the other.
+    */
+   nir_deref_var *deref;
+   struct exec_node direct_derefs_link;
+
+   struct set *loads;
+   struct set *stores;
+   struct set *copies;
+
+   struct nir_phi_builder_value *pb_value;
+
+   struct deref_node *wildcard;
+   struct deref_node *indirect;
+   struct deref_node *children[0];
+};
+
+struct lower_variables_state {
+   nir_shader *shader;
+   void *dead_ctx;
+   nir_function_impl *impl;
+
+   /* A hash table mapping variables to deref_node data */
+   struct hash_table *deref_var_nodes;
+
+   /* A hash table mapping fully-qualified direct dereferences, i.e.
+    * dereferences with no indirect or wildcard array dereferences, to
+    * deref_node data.
+    *
+    * At the moment, we only lower loads, stores, and copies that can be
+    * trivially lowered to loads and stores, i.e. copies with no indirects
+    * and no wildcards.  If a part of a variable that is being loaded from
+    * and/or stored into is also involved in a copy operation with
+    * wildcards, then we lower that copy operation to loads and stores, but
+    * otherwise we leave copies with wildcards alone. Since the only derefs
+    * used in these loads, stores, and trivial copies are ones with no
+    * wildcards and no indirects, these are precisely the derefs that we
+    * can actually consider lowering.
+    */
+   struct exec_list direct_deref_nodes;
+
+   /* Controls whether get_deref_node will add variables to the
+    * direct_deref_nodes table.  This is turned on when we are initially
+    * scanning for load/store instructions.  It is then turned off so we
+    * don't accidentally change the direct_deref_nodes table while we're
+    * iterating throug it.
+    */
+   bool add_to_direct_deref_nodes;
+
+   struct nir_phi_builder *phi_builder;
+};
+
+static struct deref_node *
+deref_node_create(struct deref_node *parent,
+                  const struct glsl_type *type, nir_shader *shader)
+{
+   size_t size = sizeof(struct deref_node) +
+                 glsl_get_length(type) * sizeof(struct deref_node *);
+
+   struct deref_node *node = rzalloc_size(shader, size);
+   node->type = type;
+   node->parent = parent;
+   node->deref = NULL;
+   exec_node_init(&node->direct_derefs_link);
+
+   return node;
+}
+
+/* Returns the deref node associated with the given variable.  This will be
+ * the root of the tree representing all of the derefs of the given variable.
+ */
+static struct deref_node *
+get_deref_node_for_var(nir_variable *var, struct lower_variables_state *state)
+{
+   struct deref_node *node;
+
+   struct hash_entry *var_entry =
+      _mesa_hash_table_search(state->deref_var_nodes, var);
+
+   if (var_entry) {
+      return var_entry->data;
+   } else {
+      node = deref_node_create(NULL, var->type, state->dead_ctx);
+      _mesa_hash_table_insert(state->deref_var_nodes, var, node);
+      return node;
+   }
+}
+
+/* Gets the deref_node for the given deref chain and creates it if it
+ * doesn't yet exist.  If the deref is fully-qualified and direct and
+ * state->add_to_direct_deref_nodes is true, it will be added to the hash
+ * table of of fully-qualified direct derefs.
+ */
+static struct deref_node *
+get_deref_node(nir_deref_var *deref, struct lower_variables_state *state)
+{
+   bool is_direct = true;
+
+   /* Start at the base of the chain. */
+   struct deref_node *node = get_deref_node_for_var(deref->var, state);
+   assert(deref->deref.type == node->type);
+
+   for (nir_deref *tail = deref->deref.child; tail; tail = tail->child) {
+      switch (tail->deref_type) {
+      case nir_deref_type_struct: {
+         nir_deref_struct *deref_struct = nir_deref_as_struct(tail);
+
+         assert(deref_struct->index < glsl_get_length(node->type));
+
+         if (node->children[deref_struct->index] == NULL)
+            node->children[deref_struct->index] =
+               deref_node_create(node, tail->type, state->dead_ctx);
+
+         node = node->children[deref_struct->index];
+         break;
+      }
+
+      case nir_deref_type_array: {
+         nir_deref_array *arr = nir_deref_as_array(tail);
+
+         switch (arr->deref_array_type) {
+         case nir_deref_array_type_direct:
+            /* This is possible if a loop unrolls and generates an
+             * out-of-bounds offset.  We need to handle this at least
+             * somewhat gracefully.
+             */
+            if (arr->base_offset >= glsl_get_length(node->type))
+               return NULL;
+
+            if (node->children[arr->base_offset] == NULL)
+               node->children[arr->base_offset] =
+                  deref_node_create(node, tail->type, state->dead_ctx);
+
+            node = node->children[arr->base_offset];
+            break;
+
+         case nir_deref_array_type_indirect:
+            if (node->indirect == NULL)
+               node->indirect = deref_node_create(node, tail->type,
+                                                  state->dead_ctx);
+
+            node = node->indirect;
+            is_direct = false;
+            break;
+
+         case nir_deref_array_type_wildcard:
+            if (node->wildcard == NULL)
+               node->wildcard = deref_node_create(node, tail->type,
+                                                  state->dead_ctx);
+
+            node = node->wildcard;
+            is_direct = false;
+            break;
+
+         default:
+            unreachable("Invalid array deref type");
+         }
+         break;
+      }
+      default:
+         unreachable("Invalid deref type");
+      }
+   }
+
+   assert(node);
+
+   /* Only insert if it isn't already in the list. */
+   if (is_direct && state->add_to_direct_deref_nodes &&
+       node->direct_derefs_link.next == NULL) {
+      node->deref = deref;
+      assert(deref->var != NULL);
+      exec_list_push_tail(&state->direct_deref_nodes,
+                          &node->direct_derefs_link);
+   }
+
+   return node;
+}
+
+/* \sa foreach_deref_node_match */
+static bool
+foreach_deref_node_worker(struct deref_node *node, nir_deref *deref,
+                          bool (* cb)(struct deref_node *node,
+                                      struct lower_variables_state *state),
+                          struct lower_variables_state *state)
+{
+   if (deref->child == NULL) {
+      return cb(node, state);
+   } else {
+      switch (deref->child->deref_type) {
+      case nir_deref_type_array: {
+         nir_deref_array *arr = nir_deref_as_array(deref->child);
+         assert(arr->deref_array_type == nir_deref_array_type_direct);
+         if (node->children[arr->base_offset] &&
+             !foreach_deref_node_worker(node->children[arr->base_offset],
+                                        deref->child, cb, state))
+            return false;
+
+         if (node->wildcard &&
+             !foreach_deref_node_worker(node->wildcard,
+                                        deref->child, cb, state))
+            return false;
+
+         return true;
+      }
+
+      case nir_deref_type_struct: {
+         nir_deref_struct *str = nir_deref_as_struct(deref->child);
+         return foreach_deref_node_worker(node->children[str->index],
+                                          deref->child, cb, state);
+      }
+
+      default:
+         unreachable("Invalid deref child type");
+      }
+   }
+}
+
+/* Walks over every "matching" deref_node and calls the callback.  A node
+ * is considered to "match" if either refers to that deref or matches up t
+ * a wildcard.  In other words, the following would match a[6].foo[3].bar:
+ *
+ * a[6].foo[3].bar
+ * a[*].foo[3].bar
+ * a[6].foo[*].bar
+ * a[*].foo[*].bar
+ *
+ * The given deref must be a full-length and fully qualified (no wildcards
+ * or indirects) deref chain.
+ */
+static bool
+foreach_deref_node_match(nir_deref_var *deref,
+                         bool (* cb)(struct deref_node *node,
+                                     struct lower_variables_state *state),
+                         struct lower_variables_state *state)
+{
+   nir_deref_var var_deref = *deref;
+   var_deref.deref.child = NULL;
+   struct deref_node *node = get_deref_node(&var_deref, state);
+
+   if (node == NULL)
+      return false;
+
+   return foreach_deref_node_worker(node, &deref->deref, cb, state);
+}
+
+/* \sa deref_may_be_aliased */
+static bool
+deref_may_be_aliased_node(struct deref_node *node, nir_deref *deref,
+                          struct lower_variables_state *state)
+{
+   if (deref->child == NULL) {
+      return false;
+   } else {
+      switch (deref->child->deref_type) {
+      case nir_deref_type_array: {
+         nir_deref_array *arr = nir_deref_as_array(deref->child);
+         if (arr->deref_array_type == nir_deref_array_type_indirect)
+            return true;
+
+         /* If there is an indirect at this level, we're aliased. */
+         if (node->indirect)
+            return true;
+
+         assert(arr->deref_array_type == nir_deref_array_type_direct);
+
+         if (node->children[arr->base_offset] &&
+             deref_may_be_aliased_node(node->children[arr->base_offset],
+                                       deref->child, state))
+            return true;
+
+         if (node->wildcard &&
+             deref_may_be_aliased_node(node->wildcard, deref->child, state))
+            return true;
+
+         return false;
+      }
+
+      case nir_deref_type_struct: {
+         nir_deref_struct *str = nir_deref_as_struct(deref->child);
+         if (node->children[str->index]) {
+             return deref_may_be_aliased_node(node->children[str->index],
+                                              deref->child, state);
+         } else {
+            return false;
+         }
+      }
+
+      default:
+         unreachable("Invalid nir_deref child type");
+      }
+   }
+}
+
+/* Returns true if there are no indirects that can ever touch this deref.
+ *
+ * For example, if the given deref is a[6].foo, then any uses of a[i].foo
+ * would cause this to return false, but a[i].bar would not affect it
+ * because it's a different structure member.  A var_copy involving of
+ * a[*].bar also doesn't affect it because that can be lowered to entirely
+ * direct load/stores.
+ *
+ * We only support asking this question about fully-qualified derefs.
+ * Obviously, it's pointless to ask this about indirects, but we also
+ * rule-out wildcards.  Handling Wildcard dereferences would involve
+ * checking each array index to make sure that there aren't any indirect
+ * references.
+ */
+static bool
+deref_may_be_aliased(nir_deref_var *deref,
+                     struct lower_variables_state *state)
+{
+   return deref_may_be_aliased_node(get_deref_node_for_var(deref->var, state),
+                                    &deref->deref, state);
+}
+
+static void
+register_load_instr(nir_intrinsic_instr *load_instr,
+                    struct lower_variables_state *state)
+{
+   struct deref_node *node = get_deref_node(load_instr->variables[0], state);
+   if (node == NULL)
+      return;
+
+   if (node->loads == NULL)
+      node->loads = _mesa_set_create(state->dead_ctx, _mesa_hash_pointer,
+                                     _mesa_key_pointer_equal);
+
+   _mesa_set_add(node->loads, load_instr);
+}
+
+static void
+register_store_instr(nir_intrinsic_instr *store_instr,
+                     struct lower_variables_state *state)
+{
+   struct deref_node *node = get_deref_node(store_instr->variables[0], state);
+   if (node == NULL)
+      return;
+
+   if (node->stores == NULL)
+      node->stores = _mesa_set_create(state->dead_ctx, _mesa_hash_pointer,
+                                     _mesa_key_pointer_equal);
+
+   _mesa_set_add(node->stores, store_instr);
+}
+
+static void
+register_copy_instr(nir_intrinsic_instr *copy_instr,
+                    struct lower_variables_state *state)
+{
+   for (unsigned idx = 0; idx < 2; idx++) {
+      struct deref_node *node =
+         get_deref_node(copy_instr->variables[idx], state);
+
+      if (node == NULL)
+         continue;
+
+      if (node->copies == NULL)
+         node->copies = _mesa_set_create(state->dead_ctx, _mesa_hash_pointer,
+                                         _mesa_key_pointer_equal);
+
+      _mesa_set_add(node->copies, copy_instr);
+   }
+}
+
+/* Registers all variable uses in the given block. */
+static bool
+register_variable_uses_block(nir_block *block, void *void_state)
+{
+   struct lower_variables_state *state = void_state;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_intrinsic)
+         continue;
+
+      nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+
+      switch (intrin->intrinsic) {
+      case nir_intrinsic_load_var:
+         register_load_instr(intrin, state);
+         break;
+
+      case nir_intrinsic_store_var:
+         register_store_instr(intrin, state);
+         break;
+
+      case nir_intrinsic_copy_var:
+         register_copy_instr(intrin, state);
+         break;
+
+      default:
+         continue;
+      }
+   }
+
+   return true;
+}
+
+/* Walks over all of the copy instructions to or from the given deref_node
+ * and lowers them to load/store intrinsics.
+ */
+static bool
+lower_copies_to_load_store(struct deref_node *node,
+                           struct lower_variables_state *state)
+{
+   if (!node->copies)
+      return true;
+
+   struct set_entry *copy_entry;
+   set_foreach(node->copies, copy_entry) {
+      nir_intrinsic_instr *copy = (void *)copy_entry->key;
+
+      nir_lower_var_copy_instr(copy, state->shader);
+
+      for (unsigned i = 0; i < 2; ++i) {
+         struct deref_node *arg_node =
+            get_deref_node(copy->variables[i], state);
+
+         /* Only bother removing copy entries for other nodes */
+         if (arg_node == NULL || arg_node == node)
+            continue;
+
+         struct set_entry *arg_entry = _mesa_set_search(arg_node->copies, copy);
+         assert(arg_entry);
+         _mesa_set_remove(node->copies, arg_entry);
+      }
+
+      nir_instr_remove(&copy->instr);
+   }
+
+   node->copies = NULL;
+
+   return true;
+}
+
+/* Performs variable renaming by doing a DFS of the dominance tree
+ *
+ * This algorithm is very similar to the one outlined in "Efficiently
+ * Computing Static Single Assignment Form and the Control Dependence
+ * Graph" by Cytron et. al.  The primary difference is that we only put one
+ * SSA def on the stack per block.
+ */
+static bool
+rename_variables_block(nir_block *block, struct lower_variables_state *state)
+{
+   nir_builder b;
+   nir_builder_init(&b, state->impl);
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_intrinsic)
+         continue;
+
+      nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+
+      switch (intrin->intrinsic) {
+      case nir_intrinsic_load_var: {
+         struct deref_node *node =
+            get_deref_node(intrin->variables[0], state);
+
+         if (node == NULL) {
+            /* If we hit this path then we are referencing an invalid
+             * value.  Most likely, we unrolled something and are
+             * reading past the end of some array.  In any case, this
+             * should result in an undefined value.
+             */
+            nir_ssa_undef_instr *undef =
+               nir_ssa_undef_instr_create(state->shader,
+                                          intrin->num_components);
+
+            nir_instr_insert_before(&intrin->instr, &undef->instr);
+            nir_instr_remove(&intrin->instr);
+
+            nir_ssa_def_rewrite_uses(&intrin->dest.ssa,
+                                     nir_src_for_ssa(&undef->def));
+            continue;
+         }
+
+         if (!node->lower_to_ssa)
+            continue;
+
+         nir_alu_instr *mov = nir_alu_instr_create(state->shader,
+                                                   nir_op_imov);
+         mov->src[0].src = nir_src_for_ssa(
+            nir_phi_builder_value_get_block_def(node->pb_value, block));
+         for (unsigned i = intrin->num_components; i < 4; i++)
+            mov->src[0].swizzle[i] = 0;
+
+         assert(intrin->dest.is_ssa);
+
+         mov->dest.write_mask = (1 << intrin->num_components) - 1;
+         nir_ssa_dest_init(&mov->instr, &mov->dest.dest,
+                           intrin->num_components, NULL);
+
+         nir_instr_insert_before(&intrin->instr, &mov->instr);
+         nir_instr_remove(&intrin->instr);
+
+         nir_ssa_def_rewrite_uses(&intrin->dest.ssa,
+                                  nir_src_for_ssa(&mov->dest.dest.ssa));
+         break;
+      }
+
+      case nir_intrinsic_store_var: {
+         struct deref_node *node =
+            get_deref_node(intrin->variables[0], state);
+
+         if (node == NULL) {
+            /* Probably an out-of-bounds array store.  That should be a
+             * no-op. */
+            nir_instr_remove(&intrin->instr);
+            continue;
+         }
+
+         if (!node->lower_to_ssa)
+            continue;
+
+         assert(intrin->num_components ==
+                glsl_get_vector_elements(node->type));
+
+         assert(intrin->src[0].is_ssa);
+
+         nir_ssa_def *new_def;
+         b.cursor = nir_before_instr(&intrin->instr);
+
+         if (intrin->const_index[0] == (1 << intrin->num_components) - 1) {
+            /* Whole variable store - just copy the source.  Note that
+             * intrin->num_components and intrin->src[0].ssa->num_components
+             * may differ.
+             */
+            unsigned swiz[4];
+            for (unsigned i = 0; i < 4; i++)
+               swiz[i] = i < intrin->num_components ? i : 0;
+
+            new_def = nir_swizzle(&b, intrin->src[0].ssa, swiz,
+                                  intrin->num_components, false);
+         } else {
+            nir_ssa_def *old_def =
+               nir_phi_builder_value_get_block_def(node->pb_value, block);
+            /* For writemasked store_var intrinsics, we combine the newly
+             * written values with the existing contents of unwritten
+             * channels, creating a new SSA value for the whole vector.
+             */
+            nir_ssa_def *srcs[4];
+            for (unsigned i = 0; i < intrin->num_components; i++) {
+               if (intrin->const_index[0] & (1 << i)) {
+                  srcs[i] = nir_channel(&b, intrin->src[0].ssa, i);
+               } else {
+                  srcs[i] = nir_channel(&b, old_def, i);
+               }
+            }
+            new_def = nir_vec(&b, srcs, intrin->num_components);
+         }
+
+         assert(new_def->num_components == intrin->num_components);
+
+         nir_phi_builder_value_set_block_def(node->pb_value, block, new_def);
+         nir_instr_remove(&intrin->instr);
+         break;
+      }
+
+      default:
+         break;
+      }
+   }
+
+   for (unsigned i = 0; i < block->num_dom_children; ++i)
+      rename_variables_block(block->dom_children[i], state);
+
+   return true;
+}
+
+/** Implements a pass to lower variable uses to SSA values
+ *
+ * This path walks the list of instructions and tries to lower as many
+ * local variable load/store operations to SSA defs and uses as it can.
+ * The process involves four passes:
+ *
+ *  1) Iterate over all of the instructions and mark where each local
+ *     variable deref is used in a load, store, or copy.  While we're at
+ *     it, we keep track of all of the fully-qualified (no wildcards) and
+ *     fully-direct references we see and store them in the
+ *     direct_deref_nodes hash table.
+ *
+ *  2) Walk over the the list of fully-qualified direct derefs generated in
+ *     the previous pass.  For each deref, we determine if it can ever be
+ *     aliased, i.e. if there is an indirect reference anywhere that may
+ *     refer to it.  If it cannot be aliased, we mark it for lowering to an
+ *     SSA value.  At this point, we lower any var_copy instructions that
+ *     use the given deref to load/store operations and, if the deref has a
+ *     constant initializer, we go ahead and add a load_const value at the
+ *     beginning of the function with the initialized value.
+ *
+ *  3) Walk over the list of derefs we plan to lower to SSA values and
+ *     insert phi nodes as needed.
+ *
+ *  4) Perform "variable renaming" by replacing the load/store instructions
+ *     with SSA definitions and SSA uses.
+ */
+static bool
+nir_lower_vars_to_ssa_impl(nir_function_impl *impl)
+{
+   struct lower_variables_state state;
+
+   state.shader = impl->function->shader;
+   state.dead_ctx = ralloc_context(state.shader);
+   state.impl = impl;
+
+   state.deref_var_nodes = _mesa_hash_table_create(state.dead_ctx,
+                                                   _mesa_hash_pointer,
+                                                   _mesa_key_pointer_equal);
+   exec_list_make_empty(&state.direct_deref_nodes);
+
+   /* Build the initial deref structures and direct_deref_nodes table */
+   state.add_to_direct_deref_nodes = true;
+   nir_foreach_block(impl, register_variable_uses_block, &state);
+
+   bool progress = false;
+
+   nir_metadata_require(impl, nir_metadata_block_index);
+
+   /* We're about to iterate through direct_deref_nodes.  Don't modify it. */
+   state.add_to_direct_deref_nodes = false;
+
+   foreach_list_typed_safe(struct deref_node, node, direct_derefs_link,
+                           &state.direct_deref_nodes) {
+      nir_deref_var *deref = node->deref;
+
+      if (deref->var->data.mode != nir_var_local) {
+         exec_node_remove(&node->direct_derefs_link);
+         continue;
+      }
+
+      if (deref_may_be_aliased(deref, &state)) {
+         exec_node_remove(&node->direct_derefs_link);
+         continue;
+      }
+
+      node->lower_to_ssa = true;
+      progress = true;
+
+      foreach_deref_node_match(deref, lower_copies_to_load_store, &state);
+   }
+
+   if (!progress)
+      return false;
+
+   nir_metadata_require(impl, nir_metadata_dominance);
+
+   /* We may have lowered some copy instructions to load/store
+    * instructions.  The uses from the copy instructions hav already been
+    * removed but we need to rescan to ensure that the uses from the newly
+    * added load/store instructions are registered.  We need this
+    * information for phi node insertion below.
+    */
+   nir_foreach_block(impl, register_variable_uses_block, &state);
+
+   state.phi_builder = nir_phi_builder_create(state.impl);
+
+   NIR_VLA(BITSET_WORD, store_blocks, BITSET_WORDS(state.impl->num_blocks));
+   foreach_list_typed(struct deref_node, node, direct_derefs_link,
+                      &state.direct_deref_nodes) {
+      if (!node->lower_to_ssa)
+         continue;
+
+      memset(store_blocks, 0,
+             BITSET_WORDS(state.impl->num_blocks) * sizeof(*store_blocks));
+
+      if (node->stores) {
+         struct set_entry *store_entry;
+         set_foreach(node->stores, store_entry) {
+            nir_intrinsic_instr *store =
+               (nir_intrinsic_instr *)store_entry->key;
+            BITSET_SET(store_blocks, store->instr.block->index);
+         }
+      }
+
+      if (node->deref->var->constant_initializer)
+         BITSET_SET(store_blocks, 0);
+
+      node->pb_value =
+         nir_phi_builder_add_value(state.phi_builder,
+                                   glsl_get_vector_elements(node->type),
+                                   store_blocks);
+
+      if (node->deref->var->constant_initializer) {
+         nir_load_const_instr *load =
+            nir_deref_get_const_initializer_load(state.shader, node->deref);
+         nir_instr_insert_before_cf_list(&impl->body, &load->instr);
+         nir_phi_builder_value_set_block_def(node->pb_value,
+                                             nir_start_block(impl), &load->def);
+      }
+   }
+
+   rename_variables_block(nir_start_block(impl), &state);
+
+   nir_phi_builder_finish(state.phi_builder);
+
+   nir_metadata_preserve(impl, nir_metadata_block_index |
+                               nir_metadata_dominance);
+
+   ralloc_free(state.dead_ctx);
+
+   return progress;
+}
+
+void
+nir_lower_vars_to_ssa(nir_shader *shader)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         nir_lower_vars_to_ssa_impl(function->impl);
+   }
+}
diff --git a/src/compiler/nir/nir_lower_vec_to_movs.c b/src/compiler/nir/nir_lower_vec_to_movs.c
new file mode 100644
index 00000000000..06d627900c6
--- /dev/null
+++ b/src/compiler/nir/nir_lower_vec_to_movs.c
@@ -0,0 +1,310 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir.h"
+
+/*
+ * Implements a simple pass that lowers vecN instructions to a series of
+ * moves with partial writes.
+ */
+
+struct vec_to_movs_state {
+   nir_function_impl *impl;
+   bool progress;
+};
+
+static bool
+src_matches_dest_reg(nir_dest *dest, nir_src *src)
+{
+   if (dest->is_ssa || src->is_ssa)
+      return false;
+
+   return (dest->reg.reg == src->reg.reg &&
+           dest->reg.base_offset == src->reg.base_offset &&
+           !dest->reg.indirect &&
+           !src->reg.indirect);
+}
+
+/**
+ * For a given starting writemask channel and corresponding source index in
+ * the vec instruction, insert a MOV to the vec instruction's dest of all the
+ * writemask channels that get read from the same src reg.
+ *
+ * Returns the writemask of our MOV, so the parent loop calling this knows
+ * which ones have been processed.
+ */
+static unsigned
+insert_mov(nir_alu_instr *vec, unsigned start_idx, nir_shader *shader)
+{
+   assert(start_idx < nir_op_infos[vec->op].num_inputs);
+
+   nir_alu_instr *mov = nir_alu_instr_create(shader, nir_op_imov);
+   nir_alu_src_copy(&mov->src[0], &vec->src[start_idx], mov);
+   nir_alu_dest_copy(&mov->dest, &vec->dest, mov);
+
+   mov->dest.write_mask = (1u << start_idx);
+   mov->src[0].swizzle[start_idx] = vec->src[start_idx].swizzle[0];
+   mov->src[0].negate = vec->src[start_idx].negate;
+   mov->src[0].abs = vec->src[start_idx].abs;
+
+   for (unsigned i = start_idx + 1; i < 4; i++) {
+      if (!(vec->dest.write_mask & (1 << i)))
+         continue;
+
+      if (nir_srcs_equal(vec->src[i].src, vec->src[start_idx].src) &&
+          vec->src[i].negate == vec->src[start_idx].negate &&
+          vec->src[i].abs == vec->src[start_idx].abs) {
+         mov->dest.write_mask |= (1 << i);
+         mov->src[0].swizzle[i] = vec->src[i].swizzle[0];
+      }
+   }
+
+   /* In some situations (if the vecN is involved in a phi-web), we can end
+    * up with a mov from a register to itself.  Some of those channels may end
+    * up doing nothing and there's no reason to have them as part of the mov.
+    */
+   if (src_matches_dest_reg(&mov->dest.dest, &mov->src[0].src) &&
+       !mov->src[0].abs && !mov->src[0].negate) {
+      for (unsigned i = 0; i < 4; i++) {
+         if (mov->src[0].swizzle[i] == i) {
+            mov->dest.write_mask &= ~(1 << i);
+         }
+      }
+   }
+
+   /* Only emit the instruction if it actually does something */
+   if (mov->dest.write_mask) {
+      nir_instr_insert_before(&vec->instr, &mov->instr);
+   } else {
+      ralloc_free(mov);
+   }
+
+   return mov->dest.write_mask;
+}
+
+static bool
+has_replicated_dest(nir_alu_instr *alu)
+{
+   return alu->op == nir_op_fdot_replicated2 ||
+          alu->op == nir_op_fdot_replicated3 ||
+          alu->op == nir_op_fdot_replicated4 ||
+          alu->op == nir_op_fdph_replicated;
+}
+
+/* Attempts to coalesce the "move" from the given source of the vec to the
+ * destination of the instruction generating the value. If, for whatever
+ * reason, we cannot coalesce the mmove, it does nothing and returns 0.  We
+ * can then call insert_mov as normal.
+ */
+static unsigned
+try_coalesce(nir_alu_instr *vec, unsigned start_idx, nir_shader *shader)
+{
+   assert(start_idx < nir_op_infos[vec->op].num_inputs);
+
+   /* We will only even try if the source is SSA */
+   if (!vec->src[start_idx].src.is_ssa)
+      return 0;
+
+   assert(vec->src[start_idx].src.ssa);
+
+   /* If we are going to do a reswizzle, then the vecN operation must be the
+    * only use of the source value.  We also can't have any source modifiers.
+    */
+   nir_foreach_use(vec->src[start_idx].src.ssa, src) {
+      if (src->parent_instr != &vec->instr)
+         return 0;
+
+      nir_alu_src *alu_src = exec_node_data(nir_alu_src, src, src);
+      if (alu_src->abs || alu_src->negate)
+         return 0;
+   }
+
+   if (!list_empty(&vec->src[start_idx].src.ssa->if_uses))
+      return 0;
+
+   if (vec->src[start_idx].src.ssa->parent_instr->type != nir_instr_type_alu)
+      return 0;
+
+   nir_alu_instr *src_alu =
+      nir_instr_as_alu(vec->src[start_idx].src.ssa->parent_instr);
+
+   if (has_replicated_dest(src_alu)) {
+      /* The fdot instruction is special: It replicates its result to all
+       * components.  This means that we can always rewrite its destination
+       * and we don't need to swizzle anything.
+       */
+   } else {
+      /* We only care about being able to re-swizzle the instruction if it is
+       * something that we can reswizzle.  It must be per-component.  The one
+       * exception to this is the fdotN instructions which implicitly splat
+       * their result out to all channels.
+       */
+      if (nir_op_infos[src_alu->op].output_size != 0)
+         return 0;
+
+      /* If we are going to reswizzle the instruction, we can't have any
+       * non-per-component sources either.
+       */
+      for (unsigned j = 0; j < nir_op_infos[src_alu->op].num_inputs; j++)
+         if (nir_op_infos[src_alu->op].input_sizes[j] != 0)
+            return 0;
+   }
+
+   /* Stash off all of the ALU instruction's swizzles. */
+   uint8_t swizzles[4][4];
+   for (unsigned j = 0; j < nir_op_infos[src_alu->op].num_inputs; j++)
+      for (unsigned i = 0; i < 4; i++)
+         swizzles[j][i] = src_alu->src[j].swizzle[i];
+
+   unsigned write_mask = 0;
+   for (unsigned i = start_idx; i < 4; i++) {
+      if (!(vec->dest.write_mask & (1 << i)))
+         continue;
+
+      if (!vec->src[i].src.is_ssa ||
+          vec->src[i].src.ssa != &src_alu->dest.dest.ssa)
+         continue;
+
+      /* At this point, the give vec source matchese up with the ALU
+       * instruction so we can re-swizzle that component to match.
+       */
+      write_mask |= 1 << i;
+      if (has_replicated_dest(src_alu)) {
+         /* Since the destination is a single replicated value, we don't need
+          * to do any reswizzling
+          */
+      } else {
+         for (unsigned j = 0; j < nir_op_infos[src_alu->op].num_inputs; j++)
+            src_alu->src[j].swizzle[i] = swizzles[j][vec->src[i].swizzle[0]];
+      }
+
+      /* Clear the no longer needed vec source */
+      nir_instr_rewrite_src(&vec->instr, &vec->src[i].src, NIR_SRC_INIT);
+   }
+
+   nir_instr_rewrite_dest(&src_alu->instr, &src_alu->dest.dest, vec->dest.dest);
+   src_alu->dest.write_mask = write_mask;
+
+   return write_mask;
+}
+
+static bool
+lower_vec_to_movs_block(nir_block *block, void *void_state)
+{
+   struct vec_to_movs_state *state = void_state;
+   nir_function_impl *impl = state->impl;
+   nir_shader *shader = impl->function->shader;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_alu)
+         continue;
+
+      nir_alu_instr *vec = nir_instr_as_alu(instr);
+
+      switch (vec->op) {
+      case nir_op_vec2:
+      case nir_op_vec3:
+      case nir_op_vec4:
+         break;
+      default:
+         continue; /* The loop */
+      }
+
+      if (vec->dest.dest.is_ssa) {
+         /* Since we insert multiple MOVs, we have a register destination. */
+         nir_register *reg = nir_local_reg_create(impl);
+         reg->num_components = vec->dest.dest.ssa.num_components;
+
+         nir_ssa_def_rewrite_uses(&vec->dest.dest.ssa, nir_src_for_reg(reg));
+
+         nir_instr_rewrite_dest(&vec->instr, &vec->dest.dest,
+                                nir_dest_for_reg(reg));
+      }
+
+      unsigned finished_write_mask = 0;
+
+      /* First, emit a MOV for all the src channels that are in the
+       * destination reg, in case other values we're populating in the dest
+       * might overwrite them.
+       */
+      for (unsigned i = 0; i < 4; i++) {
+         if (!(vec->dest.write_mask & (1 << i)))
+            continue;
+
+         if (src_matches_dest_reg(&vec->dest.dest, &vec->src[i].src)) {
+            finished_write_mask |= insert_mov(vec, i, shader);
+            break;
+         }
+      }
+
+      /* Now, emit MOVs for all the other src channels. */
+      for (unsigned i = 0; i < 4; i++) {
+         if (!(vec->dest.write_mask & (1 << i)))
+            continue;
+
+         if (!(finished_write_mask & (1 << i)))
+            finished_write_mask |= try_coalesce(vec, i, shader);
+
+         if (!(finished_write_mask & (1 << i)))
+            finished_write_mask |= insert_mov(vec, i, shader);
+      }
+
+      nir_instr_remove(&vec->instr);
+      ralloc_free(vec);
+      state->progress = true;
+   }
+
+   return true;
+}
+
+static bool
+nir_lower_vec_to_movs_impl(nir_function_impl *impl)
+{
+   struct vec_to_movs_state state = { impl, false };
+
+   nir_foreach_block(impl, lower_vec_to_movs_block, &state);
+
+   if (state.progress) {
+      nir_metadata_preserve(impl, nir_metadata_block_index |
+                                  nir_metadata_dominance);
+   }
+
+   return state.progress;
+}
+
+bool
+nir_lower_vec_to_movs(nir_shader *shader)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         progress = nir_lower_vec_to_movs_impl(function->impl) || progress;
+   }
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_metadata.c b/src/compiler/nir/nir_metadata.c
new file mode 100644
index 00000000000..61aae73221e
--- /dev/null
+++ b/src/compiler/nir/nir_metadata.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ */
+
+#include "nir.h"
+
+/*
+ * Handles management of the metadata.
+ */
+
+void
+nir_metadata_require(nir_function_impl *impl, nir_metadata required)
+{
+#define NEEDS_UPDATE(X) ((required & ~impl->valid_metadata) & (X))
+
+   if (NEEDS_UPDATE(nir_metadata_block_index))
+      nir_index_blocks(impl);
+   if (NEEDS_UPDATE(nir_metadata_dominance))
+      nir_calc_dominance_impl(impl);
+   if (NEEDS_UPDATE(nir_metadata_live_ssa_defs))
+      nir_live_ssa_defs_impl(impl);
+
+#undef NEEDS_UPDATE
+
+   impl->valid_metadata |= required;
+}
+
+void
+nir_metadata_preserve(nir_function_impl *impl, nir_metadata preserved)
+{
+   impl->valid_metadata &= preserved;
+}
+
+#ifdef DEBUG
+/**
+ * Make sure passes properly invalidate metadata (part 1).
+ *
+ * Call this before running a pass to set a bogus metadata flag, which will
+ * only be preserved if the pass forgets to call nir_metadata_preserve().
+ */
+void
+nir_metadata_set_validation_flag(nir_shader *shader)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl) {
+         function->impl->valid_metadata |= nir_metadata_not_properly_reset;
+      }
+   }
+}
+
+/**
+ * Make sure passes properly invalidate metadata (part 2).
+ *
+ * Call this after a pass makes progress to verify that the bogus metadata set by
+ * the earlier function was properly thrown away.  Note that passes may not call
+ * nir_metadata_preserve() if they don't actually make any changes at all.
+ */
+void
+nir_metadata_check_validation_flag(nir_shader *shader)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl) {
+         assert(!(function->impl->valid_metadata &
+                  nir_metadata_not_properly_reset));
+      }
+   }
+}
+#endif
diff --git a/src/compiler/nir/nir_move_vec_src_uses_to_dest.c b/src/compiler/nir/nir_move_vec_src_uses_to_dest.c
new file mode 100644
index 00000000000..b5186e6e944
--- /dev/null
+++ b/src/compiler/nir/nir_move_vec_src_uses_to_dest.c
@@ -0,0 +1,197 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir.h"
+
+/*
+ * Implements a pass that tries to move uses vecN sources to their
+ * destinations.  This is kind of like an inverse copy-propagation pass.
+ * For instance, if you have
+ *
+ * ssa_1 = vec4(a, b, c, d)
+ * ssa_2 = fadd(a, b)
+ *
+ * This will be turned into
+ *
+ * ssa_1 = vec4(a, b, c, d)
+ * ssa_2 = fadd(ssa_1.x, ssa_1.y)
+ *
+ * While this is "worse" because it adds a bunch of unneeded dependencies, it
+ * actually makes it much easier for vec4-based backends to coalesce the MOV's
+ * that result from the vec4 operation because it doesn't have to worry about
+ * quite as many reads.
+ */
+
+/* Returns true if the given SSA def dominates the instruction.  An SSA def is
+ * considered to *not* dominate the instruction that defines it.
+ */
+static bool
+ssa_def_dominates_instr(nir_ssa_def *def, nir_instr *instr)
+{
+   if (instr->index <= def->parent_instr->index) {
+      return false;
+   } else if (def->parent_instr->block == instr->block) {
+      return def->parent_instr->index < instr->index;
+   } else {
+      return nir_block_dominates(def->parent_instr->block, instr->block);
+   }
+}
+
+static bool
+move_vec_src_uses_to_dest_block(nir_block *block, void *shader)
+{
+   nir_foreach_instr(block, instr) {
+      if (instr->type != nir_instr_type_alu)
+         continue;
+
+      nir_alu_instr *vec = nir_instr_as_alu(instr);
+
+      switch (vec->op) {
+      case nir_op_vec2:
+      case nir_op_vec3:
+      case nir_op_vec4:
+         break;
+      default:
+         continue; /* The loop */
+      }
+
+      /* Can't handle non-SSA vec operations */
+      if (!vec->dest.dest.is_ssa)
+         continue;
+
+      /* Can't handle saturation */
+      if (vec->dest.saturate)
+         continue;
+
+      /* First, mark all of the sources we are going to consider for rewriting
+       * to the destination
+       */
+      int srcs_remaining = 0;
+      for (unsigned i = 0; i < nir_op_infos[vec->op].num_inputs; i++) {
+         /* We can't rewrite a source if it's not in SSA form */
+         if (!vec->src[i].src.is_ssa)
+            continue;
+
+         /* We can't rewrite a source if it has modifiers */
+         if (vec->src[i].abs || vec->src[i].negate)
+            continue;
+
+         srcs_remaining |= 1 << i;
+      }
+
+      /* We can't actually do anything with this instruction */
+      if (srcs_remaining == 0)
+         continue;
+
+      for (unsigned i; i = ffs(srcs_remaining) - 1, srcs_remaining;) {
+         int8_t swizzle[4] = { -1, -1, -1, -1 };
+
+         for (unsigned j = i; j < nir_op_infos[vec->op].num_inputs; j++) {
+            if (vec->src[j].src.ssa != vec->src[i].src.ssa)
+               continue;
+
+            /* Mark the given chanle as having been handled */
+            srcs_remaining &= ~(1 << j);
+
+            /* Mark the appropreate channel as coming from src j */
+            swizzle[vec->src[j].swizzle[0]] = j;
+         }
+
+         nir_foreach_use_safe(vec->src[i].src.ssa, use) {
+            if (use->parent_instr == &vec->instr)
+               continue;
+
+            /* We need to dominate the use if we are going to rewrite it */
+            if (!ssa_def_dominates_instr(&vec->dest.dest.ssa, use->parent_instr))
+               continue;
+
+            /* For now, we'll just rewrite ALU instructions */
+            if (use->parent_instr->type != nir_instr_type_alu)
+               continue;
+
+            assert(use->is_ssa);
+
+            nir_alu_instr *use_alu = nir_instr_as_alu(use->parent_instr);
+
+            /* Figure out which source we're actually looking at */
+            nir_alu_src *use_alu_src = exec_node_data(nir_alu_src, use, src);
+            unsigned src_idx = use_alu_src - use_alu->src;
+            assert(src_idx < nir_op_infos[use_alu->op].num_inputs);
+
+            bool can_reswizzle = true;
+            for (unsigned j = 0; j < 4; j++) {
+               if (!nir_alu_instr_channel_used(use_alu, src_idx, j))
+                  continue;
+
+               if (swizzle[use_alu_src->swizzle[j]] == -1) {
+                  can_reswizzle = false;
+                  break;
+               }
+            }
+
+            if (!can_reswizzle)
+               continue;
+
+            /* At this point, we have determined that the given use can be
+             * reswizzled to actually use the destination of the vecN operation.
+             * Go ahead and rewrite it as needed.
+             */
+            nir_instr_rewrite_src(use->parent_instr, use,
+                                  nir_src_for_ssa(&vec->dest.dest.ssa));
+            for (unsigned j = 0; j < 4; j++) {
+               if (!nir_alu_instr_channel_used(use_alu, src_idx, j))
+                  continue;
+
+               use_alu_src->swizzle[j] = swizzle[use_alu_src->swizzle[j]];
+            }
+         }
+      }
+   }
+
+   return true;
+}
+
+static void
+nir_move_vec_src_uses_to_dest_impl(nir_shader *shader, nir_function_impl *impl)
+{
+   nir_metadata_require(impl, nir_metadata_dominance);
+
+   nir_index_instrs(impl);
+   nir_foreach_block(impl, move_vec_src_uses_to_dest_block, shader);
+
+   nir_metadata_preserve(impl, nir_metadata_block_index |
+                               nir_metadata_dominance);
+}
+
+void
+nir_move_vec_src_uses_to_dest(nir_shader *shader)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         nir_move_vec_src_uses_to_dest_impl(shader, function->impl);
+   }
+}
diff --git a/src/compiler/nir/nir_normalize_cubemap_coords.c b/src/compiler/nir/nir_normalize_cubemap_coords.c
new file mode 100644
index 00000000000..9c15eb8c15c
--- /dev/null
+++ b/src/compiler/nir/nir_normalize_cubemap_coords.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand <[email protected]>
+ */
+
+#include "nir.h"
+#include "nir_builder.h"
+
+/**
+ * This file implements a NIR lowering pass to perform the normalization of
+ * the cubemap coordinates to have the largest magnitude component be -1.0
+ * or 1.0.  This is based on the old GLSL IR based pass by Eric.
+ */
+
+struct normalize_cubemap_state {
+   nir_builder b;
+   bool progress;
+};
+
+static bool
+normalize_cubemap_coords_block(nir_block *block, void *void_state)
+{
+   struct normalize_cubemap_state *state = void_state;
+   nir_builder *b = &state->b;
+
+   nir_foreach_instr(block, instr) {
+      if (instr->type != nir_instr_type_tex)
+         continue;
+
+      nir_tex_instr *tex = nir_instr_as_tex(instr);
+      if (tex->sampler_dim != GLSL_SAMPLER_DIM_CUBE)
+         continue;
+
+      b->cursor = nir_before_instr(&tex->instr);
+
+      for (unsigned i = 0; i < tex->num_srcs; i++) {
+         if (tex->src[i].src_type != nir_tex_src_coord)
+            continue;
+
+         nir_ssa_def *orig_coord =
+            nir_ssa_for_src(b, tex->src[i].src, nir_tex_instr_src_size(tex, i));
+         assert(orig_coord->num_components >= 3);
+
+         nir_ssa_def *abs = nir_fabs(b, orig_coord);
+         nir_ssa_def *norm = nir_fmax(b, nir_channel(b, abs, 0),
+                                         nir_fmax(b, nir_channel(b, abs, 1),
+                                                     nir_channel(b, abs, 2)));
+
+         nir_ssa_def *normalized = nir_fmul(b, orig_coord, nir_frcp(b, norm));
+
+         /* Array indices don't have to be normalized, so make a new vector
+          * with the coordinate's array index untouched.
+          */
+         if (tex->coord_components == 4) {
+            normalized = nir_vec4(b,
+                                  nir_channel(b, normalized, 0),
+                                  nir_channel(b, normalized, 1),
+                                  nir_channel(b, normalized, 2),
+                                  nir_channel(b, orig_coord, 3));
+         }
+
+         nir_instr_rewrite_src(&tex->instr,
+                               &tex->src[i].src,
+                               nir_src_for_ssa(normalized));
+
+         state->progress = true;
+      }
+   }
+
+   return true;
+}
+
+static bool
+normalize_cubemap_coords_impl(nir_function_impl *impl)
+{
+   struct normalize_cubemap_state state;
+   nir_builder_init(&state.b, impl);
+   state.progress = false;
+
+   nir_foreach_block(impl, normalize_cubemap_coords_block, &state);
+
+   nir_metadata_preserve(impl, nir_metadata_block_index |
+                               nir_metadata_dominance);
+
+   return state.progress;
+}
+
+bool
+nir_normalize_cubemap_coords(nir_shader *shader)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         progress = normalize_cubemap_coords_impl(function->impl) || progress;
+   }
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_opcodes.py b/src/compiler/nir/nir_opcodes.py
new file mode 100644
index 00000000000..0eff89783dd
--- /dev/null
+++ b/src/compiler/nir/nir_opcodes.py
@@ -0,0 +1,702 @@
+#! /usr/bin/env python
+#
+# Copyright (C) 2014 Connor Abbott
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice (including the next
+# paragraph) shall be included in all copies or substantial portions of the
+# Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+#
+# Authors:
+#    Connor Abbott ([email protected])
+
+
+# Class that represents all the information we have about the opcode
+# NOTE: this must be kept in sync with nir_op_info
+
+class Opcode(object):
+   """Class that represents all the information we have about the opcode
+   NOTE: this must be kept in sync with nir_op_info
+   """
+   def __init__(self, name, output_size, output_type, input_sizes,
+                input_types, algebraic_properties, const_expr):
+      """Parameters:
+
+      - name is the name of the opcode (prepend nir_op_ for the enum name)
+      - all types are strings that get nir_type_ prepended to them
+      - input_types is a list of types
+      - algebraic_properties is a space-seperated string, where nir_op_is_ is
+        prepended before each entry
+      - const_expr is an expression or series of statements that computes the
+        constant value of the opcode given the constant values of its inputs.
+
+      Constant expressions are formed from the variables src0, src1, ...,
+      src(N-1), where N is the number of arguments.  The output of the
+      expression should be stored in the dst variable.  Per-component input
+      and output variables will be scalars and non-per-component input and
+      output variables will be a struct with fields named x, y, z, and w
+      all of the correct type.  Input and output variables can be assumed
+      to already be of the correct type and need no conversion.  In
+      particular, the conversion from the C bool type to/from  NIR_TRUE and
+      NIR_FALSE happens automatically.
+
+      For per-component instructions, the entire expression will be
+      executed once for each component.  For non-per-component
+      instructions, the expression is expected to store the correct values
+      in dst.x, dst.y, etc.  If "dst" does not exist anywhere in the
+      constant expression, an assignment to dst will happen automatically
+      and the result will be equivalent to "dst = <expression>" for
+      per-component instructions and "dst.x = dst.y = ... = <expression>"
+      for non-per-component instructions.
+      """
+      assert isinstance(name, str)
+      assert isinstance(output_size, int)
+      assert isinstance(output_type, str)
+      assert isinstance(input_sizes, list)
+      assert isinstance(input_sizes[0], int)
+      assert isinstance(input_types, list)
+      assert isinstance(input_types[0], str)
+      assert isinstance(algebraic_properties, str)
+      assert isinstance(const_expr, str)
+      assert len(input_sizes) == len(input_types)
+      assert 0 <= output_size <= 4
+      for size in input_sizes:
+         assert 0 <= size <= 4
+         if output_size != 0:
+            assert size != 0
+      self.name = name
+      self.num_inputs = len(input_sizes)
+      self.output_size = output_size
+      self.output_type = output_type
+      self.input_sizes = input_sizes
+      self.input_types = input_types
+      self.algebraic_properties = algebraic_properties
+      self.const_expr = const_expr
+
+# helper variables for strings
+tfloat = "float"
+tint = "int"
+tbool = "bool"
+tuint = "uint"
+
+commutative = "commutative "
+associative = "associative "
+
+# global dictionary of opcodes
+opcodes = {}
+
+def opcode(name, output_size, output_type, input_sizes, input_types,
+           algebraic_properties, const_expr):
+   assert name not in opcodes
+   opcodes[name] = Opcode(name, output_size, output_type, input_sizes,
+                          input_types, algebraic_properties, const_expr)
+
+def unop_convert(name, out_type, in_type, const_expr):
+   opcode(name, 0, out_type, [0], [in_type], "", const_expr)
+
+def unop(name, ty, const_expr):
+   opcode(name, 0, ty, [0], [ty], "", const_expr)
+
+def unop_horiz(name, output_size, output_type, input_size, input_type,
+               const_expr):
+   opcode(name, output_size, output_type, [input_size], [input_type], "",
+          const_expr)
+
+def unop_reduce(name, output_size, output_type, input_type, prereduce_expr,
+                reduce_expr, final_expr):
+   def prereduce(src):
+      return "(" + prereduce_expr.format(src=src) + ")"
+   def final(src):
+      return final_expr.format(src="(" + src + ")")
+   def reduce_(src0, src1):
+      return reduce_expr.format(src0=src0, src1=src1)
+   src0 = prereduce("src0.x")
+   src1 = prereduce("src0.y")
+   src2 = prereduce("src0.z")
+   src3 = prereduce("src0.w")
+   unop_horiz(name + "2", output_size, output_type, 2, input_type,
+              final(reduce_(src0, src1)))
+   unop_horiz(name + "3", output_size, output_type, 3, input_type,
+              final(reduce_(reduce_(src0, src1), src2)))
+   unop_horiz(name + "4", output_size, output_type, 4, input_type,
+              final(reduce_(reduce_(src0, src1), reduce_(src2, src3))))
+
+
+# These two move instructions differ in what modifiers they support and what
+# the negate modifier means. Otherwise, they are identical.
+unop("fmov", tfloat, "src0")
+unop("imov", tint, "src0")
+
+unop("ineg", tint, "-src0")
+unop("fneg", tfloat, "-src0")
+unop("inot", tint, "~src0") # invert every bit of the integer
+unop("fnot", tfloat, "(src0 == 0.0f) ? 1.0f : 0.0f")
+unop("fsign", tfloat, "(src0 == 0.0f) ? 0.0f : ((src0 > 0.0f) ? 1.0f : -1.0f)")
+unop("isign", tint, "(src0 == 0) ? 0 : ((src0 > 0) ? 1 : -1)")
+unop("iabs", tint, "(src0 < 0) ? -src0 : src0")
+unop("fabs", tfloat, "fabsf(src0)")
+unop("fsat", tfloat, "(src0 > 1.0f) ? 1.0f : ((src0 <= 0.0f) ? 0.0f : src0)")
+unop("frcp", tfloat, "1.0f / src0")
+unop("frsq", tfloat, "1.0f / sqrtf(src0)")
+unop("fsqrt", tfloat, "sqrtf(src0)")
+unop("fexp2", tfloat, "exp2f(src0)")
+unop("flog2", tfloat, "log2f(src0)")
+unop_convert("f2i", tint, tfloat, "src0") # Float-to-integer conversion.
+unop_convert("f2u", tuint, tfloat, "src0") # Float-to-unsigned conversion
+unop_convert("i2f", tfloat, tint, "src0") # Integer-to-float conversion.
+# Float-to-boolean conversion
+unop_convert("f2b", tbool, tfloat, "src0 != 0.0f")
+# Boolean-to-float conversion
+unop_convert("b2f", tfloat, tbool, "src0 ? 1.0f : 0.0f")
+# Int-to-boolean conversion
+unop_convert("i2b", tbool, tint, "src0 != 0")
+unop_convert("b2i", tint, tbool, "src0 ? 1 : 0") # Boolean-to-int conversion
+unop_convert("u2f", tfloat, tuint, "src0") # Unsigned-to-float conversion.
+
+# Unary floating-point rounding operations.
+
+
+unop("ftrunc", tfloat, "truncf(src0)")
+unop("fceil", tfloat, "ceilf(src0)")
+unop("ffloor", tfloat, "floorf(src0)")
+unop("ffract", tfloat, "src0 - floorf(src0)")
+unop("fround_even", tfloat, "_mesa_roundevenf(src0)")
+
+unop("fquantize2f16", tfloat, "(fabs(src0) < ldexpf(1.0, -14)) ? copysignf(0.0f, src0) : _mesa_half_to_float(_mesa_float_to_half(src0))")
+
+# Trigonometric operations.
+
+
+unop("fsin", tfloat, "sinf(src0)")
+unop("fcos", tfloat, "cosf(src0)")
+
+
+# Partial derivatives.
+
+
+unop("fddx", tfloat, "0.0f") # the derivative of a constant is 0.
+unop("fddy", tfloat, "0.0f")
+unop("fddx_fine", tfloat, "0.0f")
+unop("fddy_fine", tfloat, "0.0f")
+unop("fddx_coarse", tfloat, "0.0f")
+unop("fddy_coarse", tfloat, "0.0f")
+
+
+# Floating point pack and unpack operations.
+
+def pack_2x16(fmt):
+   unop_horiz("pack_" + fmt + "_2x16", 1, tuint, 2, tfloat, """
+dst.x = (uint32_t) pack_fmt_1x16(src0.x);
+dst.x |= ((uint32_t) pack_fmt_1x16(src0.y)) << 16;
+""".replace("fmt", fmt))
+
+def pack_4x8(fmt):
+   unop_horiz("pack_" + fmt + "_4x8", 1, tuint, 4, tfloat, """
+dst.x = (uint32_t) pack_fmt_1x8(src0.x);
+dst.x |= ((uint32_t) pack_fmt_1x8(src0.y)) << 8;
+dst.x |= ((uint32_t) pack_fmt_1x8(src0.z)) << 16;
+dst.x |= ((uint32_t) pack_fmt_1x8(src0.w)) << 24;
+""".replace("fmt", fmt))
+
+def unpack_2x16(fmt):
+   unop_horiz("unpack_" + fmt + "_2x16", 2, tfloat, 1, tuint, """
+dst.x = unpack_fmt_1x16((uint16_t)(src0.x & 0xffff));
+dst.y = unpack_fmt_1x16((uint16_t)(src0.x << 16));
+""".replace("fmt", fmt))
+
+def unpack_4x8(fmt):
+   unop_horiz("unpack_" + fmt + "_4x8", 4, tfloat, 1, tuint, """
+dst.x = unpack_fmt_1x8((uint8_t)(src0.x & 0xff));
+dst.y = unpack_fmt_1x8((uint8_t)((src0.x >> 8) & 0xff));
+dst.z = unpack_fmt_1x8((uint8_t)((src0.x >> 16) & 0xff));
+dst.w = unpack_fmt_1x8((uint8_t)(src0.x >> 24));
+""".replace("fmt", fmt))
+
+
+pack_2x16("snorm")
+pack_4x8("snorm")
+pack_2x16("unorm")
+pack_4x8("unorm")
+pack_2x16("half")
+unpack_2x16("snorm")
+unpack_4x8("snorm")
+unpack_2x16("unorm")
+unpack_4x8("unorm")
+unpack_2x16("half")
+
+unop_horiz("pack_uvec2_to_uint", 0, tuint, 2, tuint, """
+dst = (src0.x & 0xffff) | (src0.y >> 16);
+""")
+
+unop_horiz("pack_uvec4_to_uint", 0, tuint, 4, tuint, """
+dst = (src0.x <<  0) |
+      (src0.y <<  8) |
+      (src0.z << 16) |
+      (src0.w << 24);
+""")
+
+# Lowered floating point unpacking operations.
+
+
+unop_horiz("unpack_half_2x16_split_x", 1, tfloat, 1, tuint,
+           "unpack_half_1x16((uint16_t)(src0.x & 0xffff))")
+unop_horiz("unpack_half_2x16_split_y", 1, tfloat, 1, tuint,
+           "unpack_half_1x16((uint16_t)(src0.x >> 16))")
+
+
+# Bit operations, part of ARB_gpu_shader5.
+
+
+unop("bitfield_reverse", tuint, """
+/* we're not winning any awards for speed here, but that's ok */
+dst = 0;
+for (unsigned bit = 0; bit < 32; bit++)
+   dst |= ((src0 >> bit) & 1) << (31 - bit);
+""")
+unop("bit_count", tuint, """
+dst = 0;
+for (unsigned bit = 0; bit < 32; bit++) {
+   if ((src0 >> bit) & 1)
+      dst++;
+}
+""")
+
+unop_convert("ufind_msb", tint, tuint, """
+dst = -1;
+for (int bit = 31; bit > 0; bit--) {
+   if ((src0 >> bit) & 1) {
+      dst = bit;
+      break;
+   }
+}
+""")
+
+unop("ifind_msb", tint, """
+dst = -1;
+for (int bit = 31; bit >= 0; bit--) {
+   /* If src0 < 0, we're looking for the first 0 bit.
+    * if src0 >= 0, we're looking for the first 1 bit.
+    */
+   if ((((src0 >> bit) & 1) && (src0 >= 0)) ||
+      (!((src0 >> bit) & 1) && (src0 < 0))) {
+      dst = bit;
+      break;
+   }
+}
+""")
+
+unop("find_lsb", tint, """
+dst = -1;
+for (unsigned bit = 0; bit < 32; bit++) {
+   if ((src0 >> bit) & 1) {
+      dst = bit;
+      break;
+   }
+}
+""")
+
+
+for i in xrange(1, 5):
+   for j in xrange(1, 5):
+      unop_horiz("fnoise{0}_{1}".format(i, j), i, tfloat, j, tfloat, "0.0f")
+
+def binop_convert(name, out_type, in_type, alg_props, const_expr):
+   opcode(name, 0, out_type, [0, 0], [in_type, in_type], alg_props, const_expr)
+
+def binop(name, ty, alg_props, const_expr):
+   binop_convert(name, ty, ty, alg_props, const_expr)
+
+def binop_compare(name, ty, alg_props, const_expr):
+   binop_convert(name, tbool, ty, alg_props, const_expr)
+
+def binop_horiz(name, out_size, out_type, src1_size, src1_type, src2_size,
+                src2_type, const_expr):
+   opcode(name, out_size, out_type, [src1_size, src2_size], [src1_type, src2_type],
+          "", const_expr)
+
+def binop_reduce(name, output_size, output_type, src_type, prereduce_expr,
+                 reduce_expr, final_expr):
+   def final(src):
+      return final_expr.format(src= "(" + src + ")")
+   def reduce_(src0, src1):
+      return reduce_expr.format(src0=src0, src1=src1)
+   def prereduce(src0, src1):
+      return "(" + prereduce_expr.format(src0=src0, src1=src1) + ")"
+   src0 = prereduce("src0.x", "src1.x")
+   src1 = prereduce("src0.y", "src1.y")
+   src2 = prereduce("src0.z", "src1.z")
+   src3 = prereduce("src0.w", "src1.w")
+   opcode(name + "2", output_size, output_type,
+          [2, 2], [src_type, src_type], commutative,
+          final(reduce_(src0, src1)))
+   opcode(name + "3", output_size, output_type,
+          [3, 3], [src_type, src_type], commutative,
+          final(reduce_(reduce_(src0, src1), src2)))
+   opcode(name + "4", output_size, output_type,
+          [4, 4], [src_type, src_type], commutative,
+          final(reduce_(reduce_(src0, src1), reduce_(src2, src3))))
+
+binop("fadd", tfloat, commutative + associative, "src0 + src1")
+binop("iadd", tint, commutative + associative, "src0 + src1")
+binop("fsub", tfloat, "", "src0 - src1")
+binop("isub", tint, "", "src0 - src1")
+
+binop("fmul", tfloat, commutative + associative, "src0 * src1")
+# low 32-bits of signed/unsigned integer multiply
+binop("imul", tint, commutative + associative, "src0 * src1")
+# high 32-bits of signed integer multiply
+binop("imul_high", tint, commutative,
+      "(int32_t)(((int64_t) src0 * (int64_t) src1) >> 32)")
+# high 32-bits of unsigned integer multiply
+binop("umul_high", tuint, commutative,
+      "(uint32_t)(((uint64_t) src0 * (uint64_t) src1) >> 32)")
+
+binop("fdiv", tfloat, "", "src0 / src1")
+binop("idiv", tint, "", "src0 / src1")
+binop("udiv", tuint, "", "src0 / src1")
+
+# returns a boolean representing the carry resulting from the addition of
+# the two unsigned arguments.
+
+binop_convert("uadd_carry", tuint, tuint, commutative, "src0 + src1 < src0")
+
+# returns a boolean representing the borrow resulting from the subtraction
+# of the two unsigned arguments.
+
+binop_convert("usub_borrow", tuint, tuint, "", "src0 < src1")
+
+binop("umod", tuint, "", "src1 == 0 ? 0 : src0 % src1")
+
+# For signed integers, there are several different possible definitions of
+# "modulus" or "remainder".  We follow the conventions used by LLVM and
+# SPIR-V.  The irem opcode implements the standard C/C++ signed "%"
+# operation while the imod opcode implements the more mathematical
+# "modulus" operation.  For details on the difference, see
+#
+# http://mathforum.org/library/drmath/view/52343.html
+
+binop("irem", tint, "", "src1 == 0 ? 0 : src0 % src1")
+binop("imod", tint, "",
+      "src1 == 0 ? 0 : ((src0 % src1 == 0 || (src0 >= 0) == (src1 >= 0)) ?"
+      "                 src0 % src1 : src0 % src1 + src1)")
+binop("fmod", tfloat, "", "src0 - src1 * floorf(src0 / src1)")
+binop("frem", tfloat, "", "src0 - src1 * truncf(src0 / src1)")
+
+#
+# Comparisons
+#
+
+
+# these integer-aware comparisons return a boolean (0 or ~0)
+
+binop_compare("flt", tfloat, "", "src0 < src1")
+binop_compare("fge", tfloat, "", "src0 >= src1")
+binop_compare("feq", tfloat, commutative, "src0 == src1")
+binop_compare("fne", tfloat, commutative, "src0 != src1")
+binop_compare("ilt", tint, "", "src0 < src1")
+binop_compare("ige", tint, "", "src0 >= src1")
+binop_compare("ieq", tint, commutative, "src0 == src1")
+binop_compare("ine", tint, commutative, "src0 != src1")
+binop_compare("ult", tuint, "", "src0 < src1")
+binop_compare("uge", tuint, "", "src0 >= src1")
+
+# integer-aware GLSL-style comparisons that compare floats and ints
+
+binop_reduce("ball_fequal",  1, tbool, tfloat, "{src0} == {src1}",
+             "{src0} && {src1}", "{src}")
+binop_reduce("bany_fnequal", 1, tbool, tfloat, "{src0} != {src1}",
+             "{src0} || {src1}", "{src}")
+binop_reduce("ball_iequal",  1, tbool, tint, "{src0} == {src1}",
+             "{src0} && {src1}", "{src}")
+binop_reduce("bany_inequal", 1, tbool, tint, "{src0} != {src1}",
+             "{src0} || {src1}", "{src}")
+
+# non-integer-aware GLSL-style comparisons that return 0.0 or 1.0
+
+binop_reduce("fall_equal",  1, tfloat, tfloat, "{src0} == {src1}",
+             "{src0} && {src1}", "{src} ? 1.0f : 0.0f")
+binop_reduce("fany_nequal", 1, tfloat, tfloat, "{src0} != {src1}",
+             "{src0} || {src1}", "{src} ? 1.0f : 0.0f")
+
+# These comparisons for integer-less hardware return 1.0 and 0.0 for true
+# and false respectively
+
+binop("slt", tfloat, "", "(src0 < src1) ? 1.0f : 0.0f") # Set on Less Than
+binop("sge", tfloat, "", "(src0 >= src1) ? 1.0f : 0.0f") # Set on Greater or Equal
+binop("seq", tfloat, commutative, "(src0 == src1) ? 1.0f : 0.0f") # Set on Equal
+binop("sne", tfloat, commutative, "(src0 != src1) ? 1.0f : 0.0f") # Set on Not Equal
+
+
+binop("ishl", tint, "", "src0 << src1")
+binop("ishr", tint, "", "src0 >> src1")
+binop("ushr", tuint, "", "src0 >> src1")
+
+# bitwise logic operators
+#
+# These are also used as boolean and, or, xor for hardware supporting
+# integers.
+
+
+binop("iand", tuint, commutative + associative, "src0 & src1")
+binop("ior", tuint, commutative + associative, "src0 | src1")
+binop("ixor", tuint, commutative + associative, "src0 ^ src1")
+
+
+# floating point logic operators
+#
+# These use (src != 0.0) for testing the truth of the input, and output 1.0
+# for true and 0.0 for false
+
+binop("fand", tfloat, commutative,
+      "((src0 != 0.0f) && (src1 != 0.0f)) ? 1.0f : 0.0f")
+binop("for", tfloat, commutative,
+      "((src0 != 0.0f) || (src1 != 0.0f)) ? 1.0f : 0.0f")
+binop("fxor", tfloat, commutative,
+      "(src0 != 0.0f && src1 == 0.0f) || (src0 == 0.0f && src1 != 0.0f) ? 1.0f : 0.0f")
+
+binop_reduce("fdot", 1, tfloat, tfloat, "{src0} * {src1}", "{src0} + {src1}",
+             "{src}")
+
+binop_reduce("fdot_replicated", 4, tfloat, tfloat,
+             "{src0} * {src1}", "{src0} + {src1}", "{src}")
+
+opcode("fdph", 1, tfloat, [3, 4], [tfloat, tfloat], "",
+       "src0.x * src1.x + src0.y * src1.y + src0.z * src1.z + src1.w")
+opcode("fdph_replicated", 4, tfloat, [3, 4], [tfloat, tfloat], "",
+       "src0.x * src1.x + src0.y * src1.y + src0.z * src1.z + src1.w")
+
+binop("fmin", tfloat, "", "fminf(src0, src1)")
+binop("imin", tint, commutative + associative, "src1 > src0 ? src0 : src1")
+binop("umin", tuint, commutative + associative, "src1 > src0 ? src0 : src1")
+binop("fmax", tfloat, "", "fmaxf(src0, src1)")
+binop("imax", tint, commutative + associative, "src1 > src0 ? src1 : src0")
+binop("umax", tuint, commutative + associative, "src1 > src0 ? src1 : src0")
+
+# Saturated vector add for 4 8bit ints.
+binop("usadd_4x8", tint, commutative + associative, """
+dst = 0;
+for (int i = 0; i < 32; i += 8) {
+   dst |= MIN2(((src0 >> i) & 0xff) + ((src1 >> i) & 0xff), 0xff) << i;
+}
+""")
+
+# Saturated vector subtract for 4 8bit ints.
+binop("ussub_4x8", tint, "", """
+dst = 0;
+for (int i = 0; i < 32; i += 8) {
+   int src0_chan = (src0 >> i) & 0xff;
+   int src1_chan = (src1 >> i) & 0xff;
+   if (src0_chan > src1_chan)
+      dst |= (src0_chan - src1_chan) << i;
+}
+""")
+
+# vector min for 4 8bit ints.
+binop("umin_4x8", tint, commutative + associative, """
+dst = 0;
+for (int i = 0; i < 32; i += 8) {
+   dst |= MIN2((src0 >> i) & 0xff, (src1 >> i) & 0xff) << i;
+}
+""")
+
+# vector max for 4 8bit ints.
+binop("umax_4x8", tint, commutative + associative, """
+dst = 0;
+for (int i = 0; i < 32; i += 8) {
+   dst |= MAX2((src0 >> i) & 0xff, (src1 >> i) & 0xff) << i;
+}
+""")
+
+# unorm multiply: (a * b) / 255.
+binop("umul_unorm_4x8", tint, commutative + associative, """
+dst = 0;
+for (int i = 0; i < 32; i += 8) {
+   int src0_chan = (src0 >> i) & 0xff;
+   int src1_chan = (src1 >> i) & 0xff;
+   dst |= ((src0_chan * src1_chan) / 255) << i;
+}
+""")
+
+binop("fpow", tfloat, "", "powf(src0, src1)")
+
+binop_horiz("pack_half_2x16_split", 1, tuint, 1, tfloat, 1, tfloat,
+            "pack_half_1x16(src0.x) | (pack_half_1x16(src1.x) << 16)")
+
+# bfm implements the behavior of the first operation of the SM5 "bfi" assembly
+# and that of the "bfi1" i965 instruction. That is, it has undefined behavior
+# if either of its arguments are 32.
+binop_convert("bfm", tuint, tint, "", """
+int bits = src0, offset = src1;
+if (offset < 0 || bits < 0 || offset > 31 || bits > 31 || offset + bits > 32)
+   dst = 0; /* undefined */
+else
+   dst = ((1u << bits) - 1) << offset;
+""")
+
+opcode("ldexp", 0, tfloat, [0, 0], [tfloat, tint], "", """
+dst = ldexpf(src0, src1);
+/* flush denormals to zero. */
+if (!isnormal(dst))
+   dst = copysignf(0.0f, src0);
+""")
+
+# Combines the first component of each input to make a 2-component vector.
+
+binop_horiz("vec2", 2, tuint, 1, tuint, 1, tuint, """
+dst.x = src0.x;
+dst.y = src1.x;
+""")
+
+# Byte extraction
+binop("extract_ubyte", tuint, "", "(uint8_t)(src0 >> (src1 * 8))")
+binop("extract_ibyte", tint, "", "(int8_t)(src0 >> (src1 * 8))")
+
+# Word extraction
+binop("extract_uword", tuint, "", "(uint16_t)(src0 >> (src1 * 16))")
+binop("extract_iword", tint, "", "(int16_t)(src0 >> (src1 * 16))")
+
+
+def triop(name, ty, const_expr):
+   opcode(name, 0, ty, [0, 0, 0], [ty, ty, ty], "", const_expr)
+def triop_horiz(name, output_size, src1_size, src2_size, src3_size, const_expr):
+   opcode(name, output_size, tuint,
+   [src1_size, src2_size, src3_size],
+   [tuint, tuint, tuint], "", const_expr)
+
+triop("ffma", tfloat, "src0 * src1 + src2")
+
+triop("flrp", tfloat, "src0 * (1 - src2) + src1 * src2")
+
+# Conditional Select
+#
+# A vector conditional select instruction (like ?:, but operating per-
+# component on vectors). There are two versions, one for floating point
+# bools (0.0 vs 1.0) and one for integer bools (0 vs ~0).
+
+
+triop("fcsel", tfloat, "(src0 != 0.0f) ? src1 : src2")
+opcode("bcsel", 0, tuint, [0, 0, 0],
+      [tbool, tuint, tuint], "", "src0 ? src1 : src2")
+
+# SM5 bfi assembly
+triop("bfi", tuint, """
+unsigned mask = src0, insert = src1, base = src2;
+if (mask == 0) {
+   dst = base;
+} else {
+   unsigned tmp = mask;
+   while (!(tmp & 1)) {
+      tmp >>= 1;
+      insert <<= 1;
+   }
+   dst = (base & ~mask) | (insert & mask);
+}
+""")
+
+# SM5 ubfe/ibfe assembly
+opcode("ubfe", 0, tuint,
+       [0, 0, 0], [tuint, tint, tint], "", """
+unsigned base = src0;
+int offset = src1, bits = src2;
+if (bits == 0) {
+   dst = 0;
+} else if (bits < 0 || offset < 0) {
+   dst = 0; /* undefined */
+} else if (offset + bits < 32) {
+   dst = (base << (32 - bits - offset)) >> (32 - bits);
+} else {
+   dst = base >> offset;
+}
+""")
+opcode("ibfe", 0, tint,
+       [0, 0, 0], [tint, tint, tint], "", """
+int base = src0;
+int offset = src1, bits = src2;
+if (bits == 0) {
+   dst = 0;
+} else if (bits < 0 || offset < 0) {
+   dst = 0; /* undefined */
+} else if (offset + bits < 32) {
+   dst = (base << (32 - bits - offset)) >> (32 - bits);
+} else {
+   dst = base >> offset;
+}
+""")
+
+# GLSL bitfieldExtract()
+opcode("ubitfield_extract", 0, tuint,
+       [0, 0, 0], [tuint, tint, tint], "", """
+unsigned base = src0;
+int offset = src1, bits = src2;
+if (bits == 0) {
+   dst = 0;
+} else if (bits < 0 || offset < 0 || offset + bits > 32) {
+   dst = 0; /* undefined per the spec */
+} else {
+   dst = (base >> offset) & ((1ull << bits) - 1);
+}
+""")
+opcode("ibitfield_extract", 0, tint,
+       [0, 0, 0], [tint, tint, tint], "", """
+int base = src0;
+int offset = src1, bits = src2;
+if (bits == 0) {
+   dst = 0;
+} else if (offset < 0 || bits < 0 || offset + bits > 32) {
+   dst = 0;
+} else {
+   dst = (base << (32 - offset - bits)) >> offset; /* use sign-extending shift */
+}
+""")
+
+# Combines the first component of each input to make a 3-component vector.
+
+triop_horiz("vec3", 3, 1, 1, 1, """
+dst.x = src0.x;
+dst.y = src1.x;
+dst.z = src2.x;
+""")
+
+def quadop_horiz(name, output_size, src1_size, src2_size, src3_size,
+                 src4_size, const_expr):
+   opcode(name, output_size, tuint,
+          [src1_size, src2_size, src3_size, src4_size],
+          [tuint, tuint, tuint, tuint],
+          "", const_expr)
+
+opcode("bitfield_insert", 0, tuint, [0, 0, 0, 0],
+       [tuint, tuint, tint, tint], "", """
+unsigned base = src0, insert = src1;
+int offset = src2, bits = src3;
+if (bits == 0) {
+   dst = 0;
+} else if (offset < 0 || bits < 0 || bits + offset > 32) {
+   dst = 0;
+} else {
+   unsigned mask = ((1ull << bits) - 1) << offset;
+   dst = (base & ~mask) | ((insert << bits) & mask);
+}
+""")
+
+quadop_horiz("vec4", 4, 1, 1, 1, 1, """
+dst.x = src0.x;
+dst.y = src1.x;
+dst.z = src2.x;
+dst.w = src3.x;
+""")
+
+
diff --git a/src/compiler/nir/nir_opcodes_c.py b/src/compiler/nir/nir_opcodes_c.py
new file mode 100644
index 00000000000..7049c5be676
--- /dev/null
+++ b/src/compiler/nir/nir_opcodes_c.py
@@ -0,0 +1,55 @@
+#! /usr/bin/env python
+#
+# Copyright (C) 2014 Connor Abbott
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice (including the next
+# paragraph) shall be included in all copies or substantial portions of the
+# Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+#
+# Authors:
+#    Connor Abbott ([email protected])
+
+from nir_opcodes import opcodes
+from mako.template import Template
+
+template = Template("""
+#include "nir.h"
+
+const nir_op_info nir_op_infos[nir_num_opcodes] = {
+% for name, opcode in sorted(opcodes.iteritems()):
+{
+   .name = "${name}",
+   .num_inputs = ${opcode.num_inputs},
+   .output_size = ${opcode.output_size},
+   .output_type = ${"nir_type_" + opcode.output_type},
+   .input_sizes = {
+      ${ ", ".join(str(size) for size in opcode.input_sizes) }
+   },
+   .input_types = {
+      ${ ", ".join("nir_type_" + type for type in opcode.input_types) }
+   },
+   .algebraic_properties =
+      ${ "0" if opcode.algebraic_properties == "" else " | ".join(
+            "NIR_OP_IS_" + prop.upper() for prop in
+               opcode.algebraic_properties.strip().split(" ")) }
+},
+% endfor
+};
+""")
+
+print template.render(opcodes=opcodes)
diff --git a/src/compiler/nir/nir_opcodes_h.py b/src/compiler/nir/nir_opcodes_h.py
new file mode 100644
index 00000000000..be15a96d236
--- /dev/null
+++ b/src/compiler/nir/nir_opcodes_h.py
@@ -0,0 +1,47 @@
+#! /usr/bin/env python
+
+template = """\
+/* Copyright (C) 2014 Connor Abbott
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ */
+
+#ifndef _NIR_OPCODES_
+#define _NIR_OPCODES_
+
+<% opcode_names = sorted(opcodes.iterkeys()) %>
+
+typedef enum {
+% for name in opcode_names:
+   nir_op_${name},
+% endfor
+   nir_last_opcode = nir_op_${opcode_names[-1]},
+   nir_num_opcodes = nir_last_opcode + 1
+} nir_op;
+
+#endif /* _NIR_OPCODES_ */"""
+
+from nir_opcodes import opcodes
+from mako.template import Template
+
+print Template(template).render(opcodes=opcodes)
diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py
new file mode 100644
index 00000000000..f4bfd3a921a
--- /dev/null
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -0,0 +1,354 @@
+#! /usr/bin/env python
+# -*- encoding: utf-8 -*-
+#
+# Copyright (C) 2014 Intel Corporation
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice (including the next
+# paragraph) shall be included in all copies or substantial portions of the
+# Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+#
+# Authors:
+#    Jason Ekstrand ([email protected])
+
+import nir_algebraic
+
+# Convenience variables
+a = 'a'
+b = 'b'
+c = 'c'
+d = 'd'
+
+# Written in the form (<search>, <replace>) where <search> is an expression
+# and <replace> is either an expression or a value.  An expression is
+# defined as a tuple of the form (<op>, <src0>, <src1>, <src2>, <src3>)
+# where each source is either an expression or a value.  A value can be
+# either a numeric constant or a string representing a variable name.
+#
+# Variable names are specified as "[#]name[@type]" where "#" inicates that
+# the given variable will only match constants and the type indicates that
+# the given variable will only match values from ALU instructions with the
+# given output type.
+#
+# For constants, you have to be careful to make sure that it is the right
+# type because python is unaware of the source and destination types of the
+# opcodes.
+
+optimizations = [
+   (('fneg', ('fneg', a)), a),
+   (('ineg', ('ineg', a)), a),
+   (('fabs', ('fabs', a)), ('fabs', a)),
+   (('fabs', ('fneg', a)), ('fabs', a)),
+   (('iabs', ('iabs', a)), ('iabs', a)),
+   (('iabs', ('ineg', a)), ('iabs', a)),
+   (('fadd', a, 0.0), a),
+   (('iadd', a, 0), a),
+   (('usadd_4x8', a, 0), a),
+   (('usadd_4x8', a, ~0), ~0),
+   (('fadd', ('fmul', a, b), ('fmul', a, c)), ('fmul', a, ('fadd', b, c))),
+   (('iadd', ('imul', a, b), ('imul', a, c)), ('imul', a, ('iadd', b, c))),
+   (('fadd', ('fneg', a), a), 0.0),
+   (('iadd', ('ineg', a), a), 0),
+   (('iadd', ('ineg', a), ('iadd', a, b)), b),
+   (('iadd', a, ('iadd', ('ineg', a), b)), b),
+   (('fadd', ('fneg', a), ('fadd', a, b)), b),
+   (('fadd', a, ('fadd', ('fneg', a), b)), b),
+   (('fmul', a, 0.0), 0.0),
+   (('imul', a, 0), 0),
+   (('umul_unorm_4x8', a, 0), 0),
+   (('umul_unorm_4x8', a, ~0), a),
+   (('fmul', a, 1.0), a),
+   (('imul', a, 1), a),
+   (('fmul', a, -1.0), ('fneg', a)),
+   (('imul', a, -1), ('ineg', a)),
+   (('fdiv', a, b), ('fmul', a, ('frcp', b)), 'options->lower_fdiv'),
+   (('ffma', 0.0, a, b), b),
+   (('ffma', a, 0.0, b), b),
+   (('ffma', a, b, 0.0), ('fmul', a, b)),
+   (('ffma', a, 1.0, b), ('fadd', a, b)),
+   (('ffma', 1.0, a, b), ('fadd', a, b)),
+   (('flrp', a, b, 0.0), a),
+   (('flrp', a, b, 1.0), b),
+   (('flrp', a, a, b), a),
+   (('flrp', 0.0, a, b), ('fmul', a, b)),
+   (('flrp', a, b, c), ('fadd', ('fmul', c, ('fsub', b, a)), a), 'options->lower_flrp'),
+   (('ffract', a), ('fsub', a, ('ffloor', a)), 'options->lower_ffract'),
+   (('fadd', ('fmul', a, ('fadd', 1.0, ('fneg', c))), ('fmul', b, c)), ('flrp', a, b, c), '!options->lower_flrp'),
+   (('fadd', a, ('fmul', c, ('fadd', b, ('fneg', a)))), ('flrp', a, b, c), '!options->lower_flrp'),
+   (('ffma', a, b, c), ('fadd', ('fmul', a, b), c), 'options->lower_ffma'),
+   (('fadd', ('fmul', a, b), c), ('ffma', a, b, c), '!options->lower_ffma'),
+   # Comparison simplifications
+   (('inot', ('flt', a, b)), ('fge', a, b)),
+   (('inot', ('fge', a, b)), ('flt', a, b)),
+   (('inot', ('feq', a, b)), ('fne', a, b)),
+   (('inot', ('fne', a, b)), ('feq', a, b)),
+   (('inot', ('ilt', a, b)), ('ige', a, b)),
+   (('inot', ('ige', a, b)), ('ilt', a, b)),
+   (('inot', ('ieq', a, b)), ('ine', a, b)),
+   (('inot', ('ine', a, b)), ('ieq', a, b)),
+   (('fge', ('fneg', ('fabs', a)), 0.0), ('feq', a, 0.0)),
+   (('bcsel', ('flt', a, b), a, b), ('fmin', a, b)),
+   (('bcsel', ('flt', a, b), b, a), ('fmax', a, b)),
+   (('bcsel', ('inot', 'a@bool'), b, c), ('bcsel', a, c, b)),
+   (('bcsel', a, ('bcsel', a, b, c), d), ('bcsel', a, b, d)),
+   (('fmin', a, a), a),
+   (('fmax', a, a), a),
+   (('imin', a, a), a),
+   (('imax', a, a), a),
+   (('umin', a, a), a),
+   (('umax', a, a), a),
+   (('fmin', ('fmax', a, 0.0), 1.0), ('fsat', a), '!options->lower_fsat'),
+   (('fmax', ('fmin', a, 1.0), 0.0), ('fsat', a), '!options->lower_fsat'),
+   (('fsat', a), ('fmin', ('fmax', a, 0.0), 1.0), 'options->lower_fsat'),
+   (('fsat', ('fsat', a)), ('fsat', a)),
+   (('fmin', ('fmax', ('fmin', ('fmax', a, 0.0), 1.0), 0.0), 1.0), ('fmin', ('fmax', a, 0.0), 1.0)),
+   (('ior', ('flt', a, b), ('flt', a, c)), ('flt', a, ('fmax', b, c))),
+   (('ior', ('flt', a, c), ('flt', b, c)), ('flt', ('fmin', a, b), c)),
+   (('ior', ('fge', a, b), ('fge', a, c)), ('fge', a, ('fmin', b, c))),
+   (('ior', ('fge', a, c), ('fge', b, c)), ('fge', ('fmax', a, b), c)),
+   (('slt', a, b), ('b2f', ('flt', a, b)), 'options->lower_scmp'),
+   (('sge', a, b), ('b2f', ('fge', a, b)), 'options->lower_scmp'),
+   (('seq', a, b), ('b2f', ('feq', a, b)), 'options->lower_scmp'),
+   (('sne', a, b), ('b2f', ('fne', a, b)), 'options->lower_scmp'),
+   (('fne', ('fneg', a), a), ('fne', a, 0.0)),
+   (('feq', ('fneg', a), a), ('feq', a, 0.0)),
+   # Emulating booleans
+   (('imul', ('b2i', a), ('b2i', b)), ('b2i', ('iand', a, b))),
+   (('fmul', ('b2f', a), ('b2f', b)), ('b2f', ('iand', a, b))),
+   (('fsat', ('fadd', ('b2f', a), ('b2f', b))), ('b2f', ('ior', a, b))),
+   (('iand', 'a@bool', 1.0), ('b2f', a)),
+   (('flt', ('fneg', ('b2f', a)), 0), a), # Generated by TGSI KILL_IF.
+   (('flt', ('fsub', 0.0, ('b2f', a)), 0), a), # Generated by TGSI KILL_IF.
+   # Comparison with the same args.  Note that these are not done for
+   # the float versions because NaN always returns false on float
+   # inequalities.
+   (('ilt', a, a), False),
+   (('ige', a, a), True),
+   (('ieq', a, a), True),
+   (('ine', a, a), False),
+   (('ult', a, a), False),
+   (('uge', a, a), True),
+   # Logical and bit operations
+   (('fand', a, 0.0), 0.0),
+   (('iand', a, a), a),
+   (('iand', a, ~0), a),
+   (('iand', a, 0), 0),
+   (('ior', a, a), a),
+   (('ior', a, 0), a),
+   (('fxor', a, a), 0.0),
+   (('ixor', a, a), 0),
+   (('inot', ('inot', a)), a),
+   # DeMorgan's Laws
+   (('iand', ('inot', a), ('inot', b)), ('inot', ('ior',  a, b))),
+   (('ior',  ('inot', a), ('inot', b)), ('inot', ('iand', a, b))),
+   # Shift optimizations
+   (('ishl', 0, a), 0),
+   (('ishl', a, 0), a),
+   (('ishr', 0, a), 0),
+   (('ishr', a, 0), a),
+   (('ushr', 0, a), 0),
+   (('ushr', a, 0), a),
+   # Exponential/logarithmic identities
+   (('fexp2', ('flog2', a)), a), # 2^lg2(a) = a
+   (('flog2', ('fexp2', a)), a), # lg2(2^a) = a
+   (('fpow', a, b), ('fexp2', ('fmul', ('flog2', a), b)), 'options->lower_fpow'), # a^b = 2^(lg2(a)*b)
+   (('fexp2', ('fmul', ('flog2', a), b)), ('fpow', a, b), '!options->lower_fpow'), # 2^(lg2(a)*b) = a^b
+   (('fpow', a, 1.0), a),
+   (('fpow', a, 2.0), ('fmul', a, a)),
+   (('fpow', a, 4.0), ('fmul', ('fmul', a, a), ('fmul', a, a))),
+   (('fpow', 2.0, a), ('fexp2', a)),
+   (('fpow', ('fpow', a, 2.2), 0.454545), a),
+   (('fpow', ('fabs', ('fpow', a, 2.2)), 0.454545), ('fabs', a)),
+   (('fsqrt', ('fexp2', a)), ('fexp2', ('fmul', 0.5, a))),
+   (('frcp', ('fexp2', a)), ('fexp2', ('fneg', a))),
+   (('frsq', ('fexp2', a)), ('fexp2', ('fmul', -0.5, a))),
+   (('flog2', ('fsqrt', a)), ('fmul', 0.5, ('flog2', a))),
+   (('flog2', ('frcp', a)), ('fneg', ('flog2', a))),
+   (('flog2', ('frsq', a)), ('fmul', -0.5, ('flog2', a))),
+   (('flog2', ('fpow', a, b)), ('fmul', b, ('flog2', a))),
+   (('fadd', ('flog2', a), ('flog2', b)), ('flog2', ('fmul', a, b))),
+   (('fadd', ('flog2', a), ('fneg', ('flog2', b))), ('flog2', ('fdiv', a, b))),
+   (('fmul', ('fexp2', a), ('fexp2', b)), ('fexp2', ('fadd', a, b))),
+   # Division and reciprocal
+   (('fdiv', 1.0, a), ('frcp', a)),
+   (('fdiv', a, b), ('fmul', a, ('frcp', b)), 'options->lower_fdiv'),
+   (('frcp', ('frcp', a)), a),
+   (('frcp', ('fsqrt', a)), ('frsq', a)),
+   (('fsqrt', a), ('frcp', ('frsq', a)), 'options->lower_fsqrt'),
+   (('frcp', ('frsq', a)), ('fsqrt', a), '!options->lower_fsqrt'),
+   # Boolean simplifications
+   (('ieq', 'a@bool', True), a),
+   (('ine', 'a@bool', True), ('inot', a)),
+   (('ine', 'a@bool', False), a),
+   (('ieq', 'a@bool', False), ('inot', 'a')),
+   (('bcsel', a, True, False), ('ine', a, 0)),
+   (('bcsel', a, False, True), ('ieq', a, 0)),
+   (('bcsel', True, b, c), b),
+   (('bcsel', False, b, c), c),
+   # The result of this should be hit by constant propagation and, in the
+   # next round of opt_algebraic, get picked up by one of the above two.
+   (('bcsel', '#a', b, c), ('bcsel', ('ine', 'a', 0), b, c)),
+
+   (('bcsel', a, b, b), b),
+   (('fcsel', a, b, b), b),
+
+   # Conversions
+   (('i2b', ('b2i', a)), a),
+   (('f2i', ('ftrunc', a)), ('f2i', a)),
+   (('f2u', ('ftrunc', a)), ('f2u', a)),
+
+   # Subtracts
+   (('fsub', a, ('fsub', 0.0, b)), ('fadd', a, b)),
+   (('isub', a, ('isub', 0, b)), ('iadd', a, b)),
+   (('ussub_4x8', a, 0), a),
+   (('ussub_4x8', a, ~0), 0),
+   (('fsub', a, b), ('fadd', a, ('fneg', b)), 'options->lower_sub'),
+   (('isub', a, b), ('iadd', a, ('ineg', b)), 'options->lower_sub'),
+   (('fneg', a), ('fsub', 0.0, a), 'options->lower_negate'),
+   (('ineg', a), ('isub', 0, a), 'options->lower_negate'),
+   (('fadd', a, ('fsub', 0.0, b)), ('fsub', a, b)),
+   (('iadd', a, ('isub', 0, b)), ('isub', a, b)),
+   (('fabs', ('fsub', 0.0, a)), ('fabs', a)),
+   (('iabs', ('isub', 0, a)), ('iabs', a)),
+
+   # Misc. lowering
+   (('fmod', a, b), ('fsub', a, ('fmul', b, ('ffloor', ('fdiv', a, b)))), 'options->lower_fmod'),
+   (('frem', a, b), ('fsub', a, ('fmul', b, ('ftrunc', ('fdiv', a, b)))), 'options->lower_fmod'),
+   (('uadd_carry', a, b), ('b2i', ('ult', ('iadd', a, b), a)), 'options->lower_uadd_carry'),
+   (('usub_borrow', a, b), ('b2i', ('ult', a, b)), 'options->lower_usub_borrow'),
+   (('ldexp', 'x', 'exp'),
+    ('fmul', 'x', ('ishl', ('imin', ('imax', ('iadd', 'exp', 0x7f), 0), 0xff), 23))),
+
+   (('bitfield_insert', 'base', 'insert', 'offset', 'bits'),
+    ('bcsel', ('ilt', 31, 'bits'), 'insert',
+              ('bfi', ('bfm', 'bits', 'offset'), 'insert', 'base')),
+    'options->lower_bitfield_insert'),
+
+   (('ibitfield_extract', 'value', 'offset', 'bits'),
+    ('bcsel', ('ilt', 31, 'bits'), 'value',
+              ('ibfe', 'value', 'offset', 'bits')),
+    'options->lower_bitfield_extract'),
+
+   (('ubitfield_extract', 'value', 'offset', 'bits'),
+    ('bcsel', ('ult', 31, 'bits'), 'value',
+              ('ubfe', 'value', 'offset', 'bits')),
+    'options->lower_bitfield_extract'),
+
+   (('extract_ibyte', a, b),
+    ('ishr', ('ishl', a, ('imul', ('isub', 3, b), 8)), 8),
+    'options->lower_extract_byte'),
+
+   (('extract_ubyte', a, b),
+    ('iand', ('ushr', a, ('imul', b, 8)), 0xff),
+    'options->lower_extract_byte'),
+
+   (('extract_iword', a, b),
+    ('ishr', ('ishl', a, ('imul', ('isub', 1, b), 16)), 16),
+    'options->lower_extract_word'),
+
+   (('extract_uword', a, b),
+    ('iand', ('ushr', a, ('imul', b, 16)), 0xffff),
+    'options->lower_extract_word'),
+
+    (('pack_unorm_2x16', 'v'),
+     ('pack_uvec2_to_uint',
+        ('f2u', ('fround_even', ('fmul', ('fsat', 'v'), 65535.0)))),
+     'options->lower_pack_unorm_2x16'),
+
+    (('pack_unorm_4x8', 'v'),
+     ('pack_uvec4_to_uint',
+        ('f2u', ('fround_even', ('fmul', ('fsat', 'v'), 255.0)))),
+     'options->lower_pack_unorm_4x8'),
+
+    (('pack_snorm_2x16', 'v'),
+     ('pack_uvec2_to_uint',
+        ('f2i', ('fround_even', ('fmul', ('fmin', 1.0, ('fmax', -1.0, 'v')), 32767.0)))),
+     'options->lower_pack_snorm_2x16'),
+
+    (('pack_snorm_4x8', 'v'),
+     ('pack_uvec4_to_uint',
+        ('f2i', ('fround_even', ('fmul', ('fmin', 1.0, ('fmax', -1.0, 'v')), 127.0)))),
+     'options->lower_pack_snorm_4x8'),
+
+    (('unpack_unorm_2x16', 'v'),
+     ('fdiv', ('u2f', ('vec4', ('extract_uword', 'v', 0),
+                               ('extract_uword', 'v', 1), 0, 0)),
+              65535.0),
+     'options->lower_unpack_unorm_2x16'),
+
+    (('unpack_unorm_4x8', 'v'),
+     ('fdiv', ('u2f', ('vec4', ('extract_ubyte', 'v', 0),
+                               ('extract_ubyte', 'v', 1),
+                               ('extract_ubyte', 'v', 2),
+                               ('extract_ubyte', 'v', 3))),
+              255.0),
+     'options->lower_unpack_unorm_4x8'),
+
+    (('unpack_snorm_2x16', 'v'),
+     ('fmin', 1.0, ('fmax', -1.0, ('fdiv', ('i2f', ('vec4', ('extract_iword', 'v', 0),
+                                                            ('extract_iword', 'v', 1), 0, 0)),
+                                           32767.0))),
+     'options->lower_unpack_snorm_2x16'),
+
+    (('unpack_snorm_4x8', 'v'),
+     ('fmin', 1.0, ('fmax', -1.0, ('fdiv', ('i2f', ('vec4', ('extract_ibyte', 'v', 0),
+                                                            ('extract_ibyte', 'v', 1),
+                                                            ('extract_ibyte', 'v', 2),
+                                                            ('extract_ibyte', 'v', 3))),
+                                           127.0))),
+     'options->lower_unpack_snorm_4x8'),
+]
+
+# Add optimizations to handle the case where the result of a ternary is
+# compared to a constant.  This way we can take things like
+#
+# (a ? 0 : 1) > 0
+#
+# and turn it into
+#
+# a ? (0 > 0) : (1 > 0)
+#
+# which constant folding will eat for lunch.  The resulting ternary will
+# further get cleaned up by the boolean reductions above and we will be
+# left with just the original variable "a".
+for op in ['flt', 'fge', 'feq', 'fne',
+           'ilt', 'ige', 'ieq', 'ine', 'ult', 'uge']:
+   optimizations += [
+      ((op, ('bcsel', 'a', '#b', '#c'), '#d'),
+       ('bcsel', 'a', (op, 'b', 'd'), (op, 'c', 'd'))),
+      ((op, '#d', ('bcsel', a, '#b', '#c')),
+       ('bcsel', 'a', (op, 'd', 'b'), (op, 'd', 'c'))),
+   ]
+
+# This section contains "late" optimizations that should be run after the
+# regular optimizations have finished.  Optimizations should go here if
+# they help code generation but do not necessarily produce code that is
+# more easily optimizable.
+late_optimizations = [
+   (('flt', ('fadd', a, b), 0.0), ('flt', a, ('fneg', b))),
+   (('fge', ('fadd', a, b), 0.0), ('fge', a, ('fneg', b))),
+   (('feq', ('fadd', a, b), 0.0), ('feq', a, ('fneg', b))),
+   (('fne', ('fadd', a, b), 0.0), ('fne', a, ('fneg', b))),
+   (('fdot2', a, b), ('fdot_replicated2', a, b), 'options->fdot_replicates'),
+   (('fdot3', a, b), ('fdot_replicated3', a, b), 'options->fdot_replicates'),
+   (('fdot4', a, b), ('fdot_replicated4', a, b), 'options->fdot_replicates'),
+   (('fdph', a, b), ('fdph_replicated', a, b), 'options->fdot_replicates'),
+]
+
+print nir_algebraic.AlgebraicPass("nir_opt_algebraic", optimizations).render()
+print nir_algebraic.AlgebraicPass("nir_opt_algebraic_late",
+                                  late_optimizations).render()
diff --git a/src/compiler/nir/nir_opt_constant_folding.c b/src/compiler/nir/nir_opt_constant_folding.c
new file mode 100644
index 00000000000..28a73f86f95
--- /dev/null
+++ b/src/compiler/nir/nir_opt_constant_folding.c
@@ -0,0 +1,201 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir_constant_expressions.h"
+#include <math.h>
+
+/*
+ * Implements SSA-based constant folding.
+ */
+
+struct constant_fold_state {
+   void *mem_ctx;
+   nir_function_impl *impl;
+   bool progress;
+};
+
+static bool
+constant_fold_alu_instr(nir_alu_instr *instr, void *mem_ctx)
+{
+   nir_const_value src[4];
+
+   if (!instr->dest.dest.is_ssa)
+      return false;
+
+   for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) {
+      if (!instr->src[i].src.is_ssa)
+         return false;
+
+      nir_instr *src_instr = instr->src[i].src.ssa->parent_instr;
+
+      if (src_instr->type != nir_instr_type_load_const)
+         return false;
+      nir_load_const_instr* load_const = nir_instr_as_load_const(src_instr);
+
+      for (unsigned j = 0; j < nir_ssa_alu_instr_src_components(instr, i);
+           j++) {
+         src[i].u[j] = load_const->value.u[instr->src[i].swizzle[j]];
+      }
+
+      /* We shouldn't have any source modifiers in the optimization loop. */
+      assert(!instr->src[i].abs && !instr->src[i].negate);
+   }
+
+   /* We shouldn't have any saturate modifiers in the optimization loop. */
+   assert(!instr->dest.saturate);
+
+   nir_const_value dest =
+      nir_eval_const_opcode(instr->op, instr->dest.dest.ssa.num_components,
+                            src);
+
+   nir_load_const_instr *new_instr =
+      nir_load_const_instr_create(mem_ctx,
+                                  instr->dest.dest.ssa.num_components);
+
+   new_instr->value = dest;
+
+   nir_instr_insert_before(&instr->instr, &new_instr->instr);
+
+   nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa,
+                            nir_src_for_ssa(&new_instr->def));
+
+   nir_instr_remove(&instr->instr);
+   ralloc_free(instr);
+
+   return true;
+}
+
+static bool
+constant_fold_deref(nir_instr *instr, nir_deref_var *deref)
+{
+   bool progress = false;
+
+   for (nir_deref *tail = deref->deref.child; tail; tail = tail->child) {
+      if (tail->deref_type != nir_deref_type_array)
+         continue;
+
+      nir_deref_array *arr = nir_deref_as_array(tail);
+
+      if (arr->deref_array_type == nir_deref_array_type_indirect &&
+          arr->indirect.is_ssa &&
+          arr->indirect.ssa->parent_instr->type == nir_instr_type_load_const) {
+         nir_load_const_instr *indirect =
+            nir_instr_as_load_const(arr->indirect.ssa->parent_instr);
+
+         arr->base_offset += indirect->value.u[0];
+
+         /* Clear out the source */
+         nir_instr_rewrite_src(instr, &arr->indirect, nir_src_for_ssa(NULL));
+
+         arr->deref_array_type = nir_deref_array_type_direct;
+
+         progress = true;
+      }
+   }
+
+   return progress;
+}
+
+static bool
+constant_fold_intrinsic_instr(nir_intrinsic_instr *instr)
+{
+   bool progress = false;
+
+   unsigned num_vars = nir_intrinsic_infos[instr->intrinsic].num_variables;
+   for (unsigned i = 0; i < num_vars; i++) {
+      progress |= constant_fold_deref(&instr->instr, instr->variables[i]);
+   }
+
+   return progress;
+}
+
+static bool
+constant_fold_tex_instr(nir_tex_instr *instr)
+{
+   if (instr->sampler)
+      return constant_fold_deref(&instr->instr, instr->sampler);
+   else
+      return false;
+}
+
+static bool
+constant_fold_block(nir_block *block, void *void_state)
+{
+   struct constant_fold_state *state = void_state;
+
+   nir_foreach_instr_safe(block, instr) {
+      switch (instr->type) {
+      case nir_instr_type_alu:
+         state->progress |= constant_fold_alu_instr(nir_instr_as_alu(instr),
+                                                    state->mem_ctx);
+         break;
+      case nir_instr_type_intrinsic:
+         state->progress |=
+            constant_fold_intrinsic_instr(nir_instr_as_intrinsic(instr));
+         break;
+      case nir_instr_type_tex:
+         state->progress |= constant_fold_tex_instr(nir_instr_as_tex(instr));
+         break;
+      default:
+         /* Don't know how to constant fold */
+         break;
+      }
+   }
+
+   return true;
+}
+
+static bool
+nir_opt_constant_folding_impl(nir_function_impl *impl)
+{
+   struct constant_fold_state state;
+
+   state.mem_ctx = ralloc_parent(impl);
+   state.impl = impl;
+   state.progress = false;
+
+   nir_foreach_block(impl, constant_fold_block, &state);
+
+   if (state.progress)
+      nir_metadata_preserve(impl, nir_metadata_block_index |
+                                  nir_metadata_dominance);
+
+   return state.progress;
+}
+
+bool
+nir_opt_constant_folding(nir_shader *shader)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         progress |= nir_opt_constant_folding_impl(function->impl);
+   }
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_opt_copy_propagate.c b/src/compiler/nir/nir_opt_copy_propagate.c
new file mode 100644
index 00000000000..d99f78ddb36
--- /dev/null
+++ b/src/compiler/nir/nir_opt_copy_propagate.c
@@ -0,0 +1,290 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+#include <main/imports.h>
+
+/**
+ * SSA-based copy propagation
+ */
+
+static bool is_move(nir_alu_instr *instr)
+{
+   if (instr->op != nir_op_fmov &&
+       instr->op != nir_op_imov)
+      return false;
+
+   if (instr->dest.saturate)
+      return false;
+
+   /* we handle modifiers in a separate pass */
+
+   if (instr->src[0].abs || instr->src[0].negate)
+      return false;
+
+   if (!instr->src[0].src.is_ssa)
+      return false;
+
+   return true;
+
+}
+
+static bool is_vec(nir_alu_instr *instr)
+{
+   for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) {
+      if (!instr->src[i].src.is_ssa)
+         return false;
+
+      /* we handle modifiers in a separate pass */
+      if (instr->src[i].abs || instr->src[i].negate)
+         return false;
+   }
+
+   return instr->op == nir_op_vec2 ||
+          instr->op == nir_op_vec3 ||
+          instr->op == nir_op_vec4;
+}
+
+static bool
+is_swizzleless_move(nir_alu_instr *instr)
+{
+   if (is_move(instr)) {
+      for (unsigned i = 0; i < 4; i++) {
+         if (!((instr->dest.write_mask >> i) & 1))
+            break;
+         if (instr->src[0].swizzle[i] != i)
+            return false;
+      }
+      return true;
+   } else if (is_vec(instr)) {
+      nir_ssa_def *def = NULL;
+      for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) {
+         if (instr->src[i].swizzle[0] != i)
+            return false;
+
+         if (def == NULL) {
+            def = instr->src[i].src.ssa;
+         } else if (instr->src[i].src.ssa != def) {
+            return false;
+         }
+      }
+      return true;
+   } else {
+      return false;
+   }
+}
+
+static bool
+copy_prop_src(nir_src *src, nir_instr *parent_instr, nir_if *parent_if)
+{
+   if (!src->is_ssa) {
+      if (src->reg.indirect)
+         return copy_prop_src(src, parent_instr, parent_if);
+      return false;
+   }
+
+   nir_instr *src_instr = src->ssa->parent_instr;
+   if (src_instr->type != nir_instr_type_alu)
+      return false;
+
+   nir_alu_instr *alu_instr = nir_instr_as_alu(src_instr);
+   if (!is_swizzleless_move(alu_instr))
+      return false;
+
+   /* Don't let copy propagation land us with a phi that has more
+    * components in its source than it has in its destination.  That badly
+    * messes up out-of-ssa.
+    */
+   if (parent_instr && parent_instr->type == nir_instr_type_phi) {
+      nir_phi_instr *phi = nir_instr_as_phi(parent_instr);
+      assert(phi->dest.is_ssa);
+      if (phi->dest.ssa.num_components !=
+          alu_instr->src[0].src.ssa->num_components)
+         return false;
+   }
+
+   if (parent_instr) {
+      nir_instr_rewrite_src(parent_instr, src,
+                            nir_src_for_ssa(alu_instr->src[0].src.ssa));
+   } else {
+      assert(src == &parent_if->condition);
+      nir_if_rewrite_condition(parent_if,
+                               nir_src_for_ssa(alu_instr->src[0].src.ssa));
+   }
+
+   return true;
+}
+
+static bool
+copy_prop_alu_src(nir_alu_instr *parent_alu_instr, unsigned index)
+{
+   nir_alu_src *src = &parent_alu_instr->src[index];
+   if (!src->src.is_ssa) {
+      if (src->src.reg.indirect)
+         return copy_prop_src(src->src.reg.indirect, &parent_alu_instr->instr,
+                              NULL);
+      return false;
+   }
+
+   nir_instr *src_instr =  src->src.ssa->parent_instr;
+   if (src_instr->type != nir_instr_type_alu)
+      return false;
+
+   nir_alu_instr *alu_instr = nir_instr_as_alu(src_instr);
+   if (!is_move(alu_instr) && !is_vec(alu_instr))
+      return false;
+
+   nir_ssa_def *def;
+   unsigned new_swizzle[4] = {0, 0, 0, 0};
+
+   if (alu_instr->op == nir_op_fmov ||
+       alu_instr->op == nir_op_imov) {
+      for (unsigned i = 0; i < 4; i++)
+         new_swizzle[i] = alu_instr->src[0].swizzle[src->swizzle[i]];
+      def = alu_instr->src[0].src.ssa;
+   } else {
+      def = NULL;
+
+      for (unsigned i = 0; i < 4; i++) {
+         if (!nir_alu_instr_channel_used(parent_alu_instr, index, i))
+            continue;
+
+         nir_ssa_def *new_def = alu_instr->src[src->swizzle[i]].src.ssa;
+         if (def == NULL)
+            def = new_def;
+         else {
+            if (def != new_def)
+               return false;
+         }
+         new_swizzle[i] = alu_instr->src[src->swizzle[i]].swizzle[0];
+      }
+   }
+
+   for (unsigned i = 0; i < 4; i++)
+      src->swizzle[i] = new_swizzle[i];
+
+   nir_instr_rewrite_src(&parent_alu_instr->instr, &src->src,
+                         nir_src_for_ssa(def));
+
+   return true;
+}
+
+typedef struct {
+   nir_instr *parent_instr;
+   bool progress;
+} copy_prop_state;
+
+static bool
+copy_prop_src_cb(nir_src *src, void *_state)
+{
+   copy_prop_state *state = (copy_prop_state *) _state;
+   while (copy_prop_src(src, state->parent_instr, NULL))
+      state->progress = true;
+
+   return true;
+}
+
+static bool
+copy_prop_instr(nir_instr *instr)
+{
+   if (instr->type == nir_instr_type_alu) {
+      nir_alu_instr *alu_instr = nir_instr_as_alu(instr);
+      bool progress = false;
+
+      for (unsigned i = 0; i < nir_op_infos[alu_instr->op].num_inputs; i++)
+         while (copy_prop_alu_src(alu_instr, i))
+            progress = true;
+
+      if (!alu_instr->dest.dest.is_ssa && alu_instr->dest.dest.reg.indirect)
+         while (copy_prop_src(alu_instr->dest.dest.reg.indirect, instr, NULL))
+            progress = true;
+
+      return progress;
+   }
+
+   copy_prop_state state;
+   state.parent_instr = instr;
+   state.progress = false;
+   nir_foreach_src(instr, copy_prop_src_cb, &state);
+
+   return state.progress;
+}
+
+static bool
+copy_prop_if(nir_if *if_stmt)
+{
+   return copy_prop_src(&if_stmt->condition, NULL, if_stmt);
+}
+
+static bool
+copy_prop_block(nir_block *block, void *_state)
+{
+   bool *progress = (bool *) _state;
+
+   nir_foreach_instr(block, instr) {
+      if (copy_prop_instr(instr))
+         *progress = true;
+   }
+
+   if (block->cf_node.node.next != NULL && /* check that we aren't the end node */
+       !nir_cf_node_is_last(&block->cf_node) &&
+       nir_cf_node_next(&block->cf_node)->type == nir_cf_node_if) {
+      nir_if *if_stmt = nir_cf_node_as_if(nir_cf_node_next(&block->cf_node));
+      if (copy_prop_if(if_stmt))
+         *progress = true;
+   }
+
+   return true;
+}
+
+static bool
+nir_copy_prop_impl(nir_function_impl *impl)
+{
+   bool progress = false;
+
+   nir_foreach_block(impl, copy_prop_block, &progress);
+
+   if (progress) {
+      nir_metadata_preserve(impl, nir_metadata_block_index |
+                                  nir_metadata_dominance);
+   }
+
+   return progress;
+}
+
+bool
+nir_copy_prop(nir_shader *shader)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl && nir_copy_prop_impl(function->impl))
+         progress = true;
+   }
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_opt_cse.c b/src/compiler/nir/nir_opt_cse.c
new file mode 100644
index 00000000000..364fb023dce
--- /dev/null
+++ b/src/compiler/nir/nir_opt_cse.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir_instr_set.h"
+
+/*
+ * Implements common subexpression elimination
+ */
+
+/*
+ * Visits and CSE's the given block and all its descendants in the dominance
+ * tree recursively. Note that the instr_set is guaranteed to only ever
+ * contain instructions that dominate the current block.
+ */
+
+static bool
+cse_block(nir_block *block, struct set *instr_set)
+{
+   bool progress = false;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (nir_instr_set_add_or_rewrite(instr_set, instr)) {
+         progress = true;
+         nir_instr_remove(instr);
+      }
+   }
+
+   for (unsigned i = 0; i < block->num_dom_children; i++) {
+      nir_block *child = block->dom_children[i];
+      progress |= cse_block(child, instr_set);
+   }
+
+   nir_foreach_instr(block, instr)
+     nir_instr_set_remove(instr_set, instr);
+
+   return progress;
+}
+
+static bool
+nir_opt_cse_impl(nir_function_impl *impl)
+{
+   struct set *instr_set = nir_instr_set_create(NULL);
+
+   nir_metadata_require(impl, nir_metadata_dominance);
+
+   bool progress = cse_block(nir_start_block(impl), instr_set);
+
+   if (progress)
+      nir_metadata_preserve(impl, nir_metadata_block_index |
+                                  nir_metadata_dominance);
+
+   nir_instr_set_destroy(instr_set);
+   return progress;
+}
+
+bool
+nir_opt_cse(nir_shader *shader)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         progress |= nir_opt_cse_impl(function->impl);
+   }
+
+   return progress;
+}
+
diff --git a/src/compiler/nir/nir_opt_dce.c b/src/compiler/nir/nir_opt_dce.c
new file mode 100644
index 00000000000..32436c18b60
--- /dev/null
+++ b/src/compiler/nir/nir_opt_dce.c
@@ -0,0 +1,183 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+
+/* SSA-based mark-and-sweep dead code elimination */
+
+typedef struct {
+   struct exec_node node;
+   nir_instr *instr;
+} worklist_elem;
+
+static void
+worklist_push(struct exec_list *worklist, nir_instr *instr)
+{
+   worklist_elem *elem = ralloc(worklist, worklist_elem);
+   elem->instr = instr;
+   instr->pass_flags = 1;
+   exec_list_push_tail(worklist, &elem->node);
+}
+
+static nir_instr *
+worklist_pop(struct exec_list *worklist)
+{
+   struct exec_node *node = exec_list_pop_head(worklist);
+   worklist_elem *elem = exec_node_data(worklist_elem, node, node);
+   return elem->instr;
+}
+
+static bool
+mark_live_cb(nir_src *src, void *_state)
+{
+   struct exec_list *worklist = (struct exec_list *) _state;
+
+   if (src->is_ssa && !src->ssa->parent_instr->pass_flags) {
+      worklist_push(worklist, src->ssa->parent_instr);
+   }
+
+   return true;
+}
+
+static void
+init_instr(nir_instr *instr, struct exec_list *worklist)
+{
+   nir_alu_instr *alu_instr;
+   nir_intrinsic_instr *intrin_instr;
+   nir_tex_instr *tex_instr;
+
+   /* We use the pass_flags to store the live/dead information.  In DCE, we
+    * just treat it as a zero/non-zerl boolean for whether or not the
+    * instruction is live.
+    */
+   instr->pass_flags = 0;
+
+   switch (instr->type) {
+   case nir_instr_type_call:
+   case nir_instr_type_jump:
+      worklist_push(worklist, instr);
+      break;
+
+   case nir_instr_type_alu:
+      alu_instr = nir_instr_as_alu(instr);
+      if (!alu_instr->dest.dest.is_ssa)
+         worklist_push(worklist, instr);
+      break;
+
+   case nir_instr_type_intrinsic:
+      intrin_instr = nir_instr_as_intrinsic(instr);
+      if (nir_intrinsic_infos[intrin_instr->intrinsic].flags &
+          NIR_INTRINSIC_CAN_ELIMINATE) {
+         if (nir_intrinsic_infos[intrin_instr->intrinsic].has_dest &&
+             !intrin_instr->dest.is_ssa) {
+            worklist_push(worklist, instr);
+         }
+      } else {
+         worklist_push(worklist, instr);
+      }
+      break;
+
+   case nir_instr_type_tex:
+      tex_instr = nir_instr_as_tex(instr);
+      if (!tex_instr->dest.is_ssa)
+         worklist_push(worklist, instr);
+      break;
+
+   default:
+      break;
+   }
+}
+
+static bool
+init_block_cb(nir_block *block, void *_state)
+{
+   struct exec_list *worklist = (struct exec_list *) _state;
+
+   nir_foreach_instr(block, instr)
+      init_instr(instr, worklist);
+
+   nir_if *following_if = nir_block_get_following_if(block);
+   if (following_if) {
+      if (following_if->condition.is_ssa &&
+          !following_if->condition.ssa->parent_instr->pass_flags)
+         worklist_push(worklist, following_if->condition.ssa->parent_instr);
+   }
+
+   return true;
+}
+
+static bool
+delete_block_cb(nir_block *block, void *_state)
+{
+   bool *progress = (bool *) _state;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (!instr->pass_flags) {
+         nir_instr_remove(instr);
+         *progress = true;
+      }
+   }
+
+   return true;
+}
+
+static bool
+nir_opt_dce_impl(nir_function_impl *impl)
+{
+   struct exec_list *worklist = ralloc(NULL, struct exec_list);
+   exec_list_make_empty(worklist);
+
+   nir_foreach_block(impl, init_block_cb, worklist);
+
+   while (!exec_list_is_empty(worklist)) {
+      nir_instr *instr = worklist_pop(worklist);
+      nir_foreach_src(instr, mark_live_cb, worklist);
+   }
+
+   ralloc_free(worklist);
+
+   bool progress = false;
+   nir_foreach_block(impl, delete_block_cb, &progress);
+
+   if (progress)
+      nir_metadata_preserve(impl, nir_metadata_block_index |
+                                  nir_metadata_dominance);
+
+   return progress;
+}
+
+bool
+nir_opt_dce(nir_shader *shader)
+{
+   bool progress = false;
+   nir_foreach_function(shader, function) {
+      if (function->impl && nir_opt_dce_impl(function->impl))
+         progress = true;
+   }
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_opt_dead_cf.c b/src/compiler/nir/nir_opt_dead_cf.c
new file mode 100644
index 00000000000..4cc6798702b
--- /dev/null
+++ b/src/compiler/nir/nir_opt_dead_cf.c
@@ -0,0 +1,358 @@
+/*
+ * Copyright © 2014 Connor Abbott
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+#include "nir_control_flow.h"
+
+/*
+ * This file implements an optimization that deletes statically
+ * unreachable/dead code. In NIR, one way this can happen if if an if
+ * statement has a constant condition:
+ *
+ * if (true) {
+ *    ...
+ * }
+ *
+ * We delete the if statement and paste the contents of the always-executed
+ * branch into the surrounding control flow, possibly removing more code if
+ * the branch had a jump at the end.
+ *
+ * Another way is that control flow can end in a jump so that code after it
+ * never gets executed. In particular, this can happen after optimizing
+ * something like:
+ *
+ * if (true) {
+ *    ...
+ *    break;
+ * }
+ * ...
+ *
+ * We also consider the case where both branches of an if end in a jump, e.g.:
+ *
+ * if (...) {
+ *    break;
+ * } else {
+ *    continue;
+ * }
+ * ...
+ *
+ * Finally, we also handle removing useless loops, i.e. loops with no side
+ * effects and without any definitions that are used elsewhere. This case is a
+ * little different from the first two in that the code is actually run (it
+ * just never does anything), but there are similar issues with needing to
+ * be careful with restarting after deleting the cf_node (see dead_cf_list())
+ * so this is a convenient place to remove them.
+ */
+
+static void
+remove_after_cf_node(nir_cf_node *node)
+{
+   nir_cf_node *end = node;
+   while (!nir_cf_node_is_last(end))
+      end = nir_cf_node_next(end);
+
+   nir_cf_list list;
+   nir_cf_extract(&list, nir_after_cf_node(node), nir_after_cf_node(end));
+   nir_cf_delete(&list);
+}
+
+static void
+opt_constant_if(nir_if *if_stmt, bool condition)
+{
+   /* First, we need to remove any phi nodes after the if by rewriting uses to
+    * point to the correct source.
+    */
+   nir_block *after = nir_cf_node_as_block(nir_cf_node_next(&if_stmt->cf_node));
+   nir_block *last_block =
+      nir_cf_node_as_block(condition ? nir_if_last_then_node(if_stmt)
+                                     : nir_if_last_else_node(if_stmt));
+
+   nir_foreach_instr_safe(after, instr) {
+      if (instr->type != nir_instr_type_phi)
+         break;
+
+      nir_phi_instr *phi = nir_instr_as_phi(instr);
+      nir_ssa_def *def = NULL;
+      nir_foreach_phi_src(phi, phi_src) {
+         if (phi_src->pred != last_block)
+            continue;
+
+         assert(phi_src->src.is_ssa);
+         def = phi_src->src.ssa;
+      }
+
+      assert(def);
+      assert(phi->dest.is_ssa);
+      nir_ssa_def_rewrite_uses(&phi->dest.ssa, nir_src_for_ssa(def));
+      nir_instr_remove(instr);
+   }
+
+   /* The control flow list we're about to paste in may include a jump at the
+    * end, and in that case we have to delete the rest of the control flow
+    * list after the if since it's unreachable and the validator will balk if
+    * we don't.
+    */
+
+   if (!exec_list_is_empty(&last_block->instr_list)) {
+      nir_instr *last_instr = nir_block_last_instr(last_block);
+      if (last_instr->type == nir_instr_type_jump)
+         remove_after_cf_node(&if_stmt->cf_node);
+   }
+
+   /* Finally, actually paste in the then or else branch and delete the if. */
+   struct exec_list *cf_list = condition ? &if_stmt->then_list
+                                         : &if_stmt->else_list;
+
+   nir_cf_list list;
+   nir_cf_extract(&list, nir_before_cf_list(cf_list),
+                  nir_after_cf_list(cf_list));
+   nir_cf_reinsert(&list, nir_after_cf_node(&if_stmt->cf_node));
+   nir_cf_node_remove(&if_stmt->cf_node);
+}
+
+static bool
+block_has_no_side_effects(nir_block *block, void *state)
+{
+   (void) state;
+
+   nir_foreach_instr(block, instr) {
+      if (instr->type == nir_instr_type_call)
+         return false;
+
+      /* Return instructions can cause us to skip over other side-effecting
+       * instructions after the loop, so consider them to have side effects
+       * here.
+       */
+
+      if (instr->type == nir_instr_type_jump &&
+          nir_instr_as_jump(instr)->type == nir_jump_return)
+         return false;
+
+      if (instr->type != nir_instr_type_intrinsic)
+         continue;
+
+      nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+      if (!nir_intrinsic_infos[intrin->intrinsic].flags &
+          NIR_INTRINSIC_CAN_ELIMINATE)
+         return false;
+   }
+
+   return true;
+}
+
+static bool
+def_not_live_out(nir_ssa_def *def, void *state)
+{
+   nir_block *after = state;
+
+   return !BITSET_TEST(after->live_in, def->live_index);
+}
+
+/*
+ * Test if a loop is dead. A loop is dead if:
+ *
+ * 1) It has no side effects (i.e. intrinsics which could possibly affect the
+ * state of the program aside from producing an SSA value, indicated by a lack
+ * of NIR_INTRINSIC_CAN_ELIMINATE).
+ *
+ * 2) It has no phi nodes after it, since those indicate values inside the
+ * loop being used after the loop.
+ *
+ * 3) If there are no phi nodes after the loop, then the only way a value
+ * defined inside the loop can be used outside the loop is if its definition
+ * dominates the block after the loop. If none of the definitions that
+ * dominate the loop exit are used outside the loop, then the loop is dead
+ * and it can be deleted.
+ */
+
+static bool
+loop_is_dead(nir_loop *loop)
+{
+   nir_block *before = nir_cf_node_as_block(nir_cf_node_prev(&loop->cf_node));
+   nir_block *after = nir_cf_node_as_block(nir_cf_node_next(&loop->cf_node));
+
+   if (!exec_list_is_empty(&after->instr_list) &&
+       nir_block_first_instr(after)->type == nir_instr_type_phi)
+      return false;
+
+   if (!nir_foreach_block_in_cf_node(&loop->cf_node, block_has_no_side_effects,
+                                     NULL))
+      return false;
+
+   nir_function_impl *impl = nir_cf_node_get_function(&loop->cf_node);
+   nir_metadata_require(impl, nir_metadata_live_ssa_defs |
+                              nir_metadata_dominance);
+
+   for (nir_block *cur = after->imm_dom; cur != before; cur = cur->imm_dom) {
+      nir_foreach_instr(cur, instr) {
+         if (!nir_foreach_ssa_def(instr, def_not_live_out, after))
+            return false;
+      }
+   }
+
+   return true;
+}
+
+static bool
+dead_cf_block(nir_block *block)
+{
+   nir_if *following_if = nir_block_get_following_if(block);
+   if (following_if) {
+     nir_const_value *const_value =
+        nir_src_as_const_value(following_if->condition);
+
+     if (!const_value)
+        return false;
+
+      opt_constant_if(following_if, const_value->u[0] != 0);
+      return true;
+   }
+
+   nir_loop *following_loop = nir_block_get_following_loop(block);
+   if (!following_loop)
+      return false;
+
+   if (!loop_is_dead(following_loop))
+      return false;
+
+   nir_cf_node_remove(&following_loop->cf_node);
+   return true;
+}
+
+static bool
+ends_in_jump(nir_block *block)
+{
+   if (exec_list_is_empty(&block->instr_list))
+      return false;
+
+   nir_instr *instr = nir_block_last_instr(block);
+   return instr->type == nir_instr_type_jump;
+}
+
+static bool
+dead_cf_list(struct exec_list *list, bool *list_ends_in_jump)
+{
+   bool progress = false;
+   *list_ends_in_jump = false;
+
+   nir_cf_node *prev = NULL;
+
+   foreach_list_typed(nir_cf_node, cur, node, list) {
+      switch (cur->type) {
+      case nir_cf_node_block: {
+         nir_block *block = nir_cf_node_as_block(cur);
+         if (dead_cf_block(block)) {
+            /* We just deleted the if or loop after this block, so we may have
+             * deleted the block before or after it -- which one is an
+             * implementation detail. Therefore, to recover the place we were
+             * at, we have to use the previous cf_node.
+             */
+
+            if (prev) {
+               cur = nir_cf_node_next(prev);
+            } else {
+               cur = exec_node_data(nir_cf_node, exec_list_get_head(list),
+                                    node);
+            }
+
+            block = nir_cf_node_as_block(cur);
+
+            progress = true;
+         }
+
+         if (ends_in_jump(block)) {
+            *list_ends_in_jump = true;
+
+            if (!exec_node_is_tail_sentinel(cur->node.next)) {
+               remove_after_cf_node(cur);
+               return true;
+            }
+         }
+
+         break;
+      }
+
+      case nir_cf_node_if: {
+         nir_if *if_stmt = nir_cf_node_as_if(cur);
+         bool then_ends_in_jump, else_ends_in_jump;
+         progress |= dead_cf_list(&if_stmt->then_list, &then_ends_in_jump);
+         progress |= dead_cf_list(&if_stmt->else_list, &else_ends_in_jump);
+
+         if (then_ends_in_jump && else_ends_in_jump) {
+            *list_ends_in_jump = true;
+            nir_block *next = nir_cf_node_as_block(nir_cf_node_next(cur));
+            if (!exec_list_is_empty(&next->instr_list) ||
+                !exec_node_is_tail_sentinel(next->cf_node.node.next)) {
+               remove_after_cf_node(cur);
+               return true;
+            }
+         }
+
+         break;
+      }
+
+      case nir_cf_node_loop: {
+         nir_loop *loop = nir_cf_node_as_loop(cur);
+         bool dummy;
+         progress |= dead_cf_list(&loop->body, &dummy);
+
+         break;
+      }
+
+      default:
+         unreachable("unknown cf node type");
+      }
+
+      prev = cur;
+   }
+
+   return progress;
+}
+
+static bool
+opt_dead_cf_impl(nir_function_impl *impl)
+{
+   bool dummy;
+   bool progress = dead_cf_list(&impl->body, &dummy);
+
+   if (progress)
+      nir_metadata_preserve(impl, nir_metadata_none);
+
+   return progress;
+}
+
+bool
+nir_opt_dead_cf(nir_shader *shader)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function)
+      if (function->impl)
+         progress |= opt_dead_cf_impl(function->impl);
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_opt_gcm.c b/src/compiler/nir/nir_opt_gcm.c
new file mode 100644
index 00000000000..a8779ce5b84
--- /dev/null
+++ b/src/compiler/nir/nir_opt_gcm.c
@@ -0,0 +1,494 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir.h"
+
+/*
+ * Implements Global Code Motion.  A description of GCM can be found in
+ * "Global Code Motion; Global Value Numbering" by Cliff Click.
+ * Unfortunately, the algorithm presented in the paper is broken in a
+ * number of ways.  The algorithm used here differs substantially from the
+ * one in the paper but it is, in my opinion, much easier to read and
+ * verify correcness.
+ */
+
+struct gcm_block_info {
+   /* Number of loops this block is inside */
+   unsigned loop_depth;
+
+   /* The last instruction inserted into this block.  This is used as we
+    * traverse the instructions and insert them back into the program to
+    * put them in the right order.
+    */
+   nir_instr *last_instr;
+};
+
+/* Flags used in the instr->pass_flags field for various instruction states */
+enum {
+   GCM_INSTR_PINNED =            (1 << 0),
+   GCM_INSTR_SCHEDULED_EARLY =   (1 << 1),
+   GCM_INSTR_SCHEDULED_LATE =    (1 << 2),
+   GCM_INSTR_PLACED =            (1 << 3),
+};
+
+struct gcm_state {
+   nir_function_impl *impl;
+   nir_instr *instr;
+
+   /* The list of non-pinned instructions.  As we do the late scheduling,
+    * we pull non-pinned instructions out of their blocks and place them in
+    * this list.  This saves us from having linked-list problems when we go
+    * to put instructions back in their blocks.
+    */
+   struct exec_list instrs;
+
+   struct gcm_block_info *blocks;
+};
+
+/* Recursively walks the CFG and builds the block_info structure */
+static void
+gcm_build_block_info(struct exec_list *cf_list, struct gcm_state *state,
+                     unsigned loop_depth)
+{
+   foreach_list_typed(nir_cf_node, node, node, cf_list) {
+      switch (node->type) {
+      case nir_cf_node_block: {
+         nir_block *block = nir_cf_node_as_block(node);
+         state->blocks[block->index].loop_depth = loop_depth;
+         break;
+      }
+      case nir_cf_node_if: {
+         nir_if *if_stmt = nir_cf_node_as_if(node);
+         gcm_build_block_info(&if_stmt->then_list, state, loop_depth);
+         gcm_build_block_info(&if_stmt->else_list, state, loop_depth);
+         break;
+      }
+      case nir_cf_node_loop: {
+         nir_loop *loop = nir_cf_node_as_loop(node);
+         gcm_build_block_info(&loop->body, state, loop_depth + 1);
+         break;
+      }
+      default:
+         unreachable("Invalid CF node type");
+      }
+   }
+}
+
+/* Walks the instruction list and marks immovable instructions as pinned
+ *
+ * This function also serves to initialize the instr->pass_flags field.
+ * After this is completed, all instructions' pass_flags fields will be set
+ * to either GCM_INSTR_PINNED or 0.
+ */
+static bool
+gcm_pin_instructions_block(nir_block *block, void *void_state)
+{
+   struct gcm_state *state = void_state;
+
+   nir_foreach_instr_safe(block, instr) {
+      switch (instr->type) {
+      case nir_instr_type_alu:
+         switch (nir_instr_as_alu(instr)->op) {
+         case nir_op_fddx:
+         case nir_op_fddy:
+         case nir_op_fddx_fine:
+         case nir_op_fddy_fine:
+         case nir_op_fddx_coarse:
+         case nir_op_fddy_coarse:
+            /* These can only go in uniform control flow; pin them for now */
+            instr->pass_flags = GCM_INSTR_PINNED;
+            break;
+
+         default:
+            instr->pass_flags = 0;
+            break;
+         }
+         break;
+
+      case nir_instr_type_tex:
+         switch (nir_instr_as_tex(instr)->op) {
+         case nir_texop_tex:
+         case nir_texop_txb:
+         case nir_texop_lod:
+            /* These two take implicit derivatives so they need to be pinned */
+            instr->pass_flags = GCM_INSTR_PINNED;
+            break;
+
+         default:
+            instr->pass_flags = 0;
+            break;
+         }
+         break;
+
+      case nir_instr_type_load_const:
+         instr->pass_flags = 0;
+         break;
+
+      case nir_instr_type_intrinsic: {
+         const nir_intrinsic_info *info =
+            &nir_intrinsic_infos[nir_instr_as_intrinsic(instr)->intrinsic];
+
+         if ((info->flags & NIR_INTRINSIC_CAN_ELIMINATE) &&
+             (info->flags & NIR_INTRINSIC_CAN_REORDER)) {
+            instr->pass_flags = 0;
+         } else {
+            instr->pass_flags = GCM_INSTR_PINNED;
+         }
+         break;
+      }
+
+      case nir_instr_type_jump:
+      case nir_instr_type_ssa_undef:
+      case nir_instr_type_phi:
+         instr->pass_flags = GCM_INSTR_PINNED;
+         break;
+
+      default:
+         unreachable("Invalid instruction type in GCM");
+      }
+
+      if (!(instr->pass_flags & GCM_INSTR_PINNED)) {
+         /* If this is an unpinned instruction, go ahead and pull it out of
+          * the program and put it on the instrs list.  This has a couple
+          * of benifits.  First, it makes the scheduling algorithm more
+          * efficient because we can avoid walking over basic blocks and
+          * pinned instructions.  Second, it keeps us from causing linked
+          * list confusion when we're trying to put everything in its
+          * proper place at the end of the pass.
+          *
+          * Note that we don't use nir_instr_remove here because that also
+          * cleans up uses and defs and we want to keep that information.
+          */
+         exec_node_remove(&instr->node);
+         exec_list_push_tail(&state->instrs, &instr->node);
+      }
+   }
+
+   return true;
+}
+
+static void
+gcm_schedule_early_instr(nir_instr *instr, struct gcm_state *state);
+
+/** Update an instructions schedule for the given source
+ *
+ * This function is called iteratively as we walk the sources of an
+ * instruction.  It ensures that the given source instruction has been
+ * scheduled and then update this instruction's block if the source
+ * instruction is lower down the tree.
+ */
+static bool
+gcm_schedule_early_src(nir_src *src, void *void_state)
+{
+   struct gcm_state *state = void_state;
+   nir_instr *instr = state->instr;
+
+   assert(src->is_ssa);
+
+   gcm_schedule_early_instr(src->ssa->parent_instr, void_state);
+
+   /* While the index isn't a proper dominance depth, it does have the
+    * property that if A dominates B then A->index <= B->index.  Since we
+    * know that this instruction must have been dominated by all of its
+    * sources at some point (even if it's gone through value-numbering),
+    * all of the sources must lie on the same branch of the dominance tree.
+    * Therefore, we can just go ahead and just compare indices.
+    */
+   if (instr->block->index < src->ssa->parent_instr->block->index)
+      instr->block = src->ssa->parent_instr->block;
+
+   /* We need to restore the state instruction because it may have been
+    * changed through the gcm_schedule_early_instr call above.  Since we
+    * may still be iterating through sources and future calls to
+    * gcm_schedule_early_src for the same instruction will still need it.
+    */
+   state->instr = instr;
+
+   return true;
+}
+
+/** Schedules an instruction early
+ *
+ * This function performs a recursive depth-first search starting at the
+ * given instruction and proceeding through the sources to schedule
+ * instructions as early as they can possibly go in the dominance tree.
+ * The instructions are "scheduled" by updating their instr->block field.
+ */
+static void
+gcm_schedule_early_instr(nir_instr *instr, struct gcm_state *state)
+{
+   if (instr->pass_flags & GCM_INSTR_SCHEDULED_EARLY)
+      return;
+
+   instr->pass_flags |= GCM_INSTR_SCHEDULED_EARLY;
+
+   /* Pinned instructions are already scheduled so we don't need to do
+    * anything.  Also, bailing here keeps us from ever following the
+    * sources of phi nodes which can be back-edges.
+    */
+   if (instr->pass_flags & GCM_INSTR_PINNED)
+      return;
+
+   /* Start with the instruction at the top.  As we iterate over the
+    * sources, it will get moved down as needed.
+    */
+   instr->block = nir_start_block(state->impl);
+   state->instr = instr;
+
+   nir_foreach_src(instr, gcm_schedule_early_src, state);
+}
+
+static void
+gcm_schedule_late_instr(nir_instr *instr, struct gcm_state *state);
+
+/** Schedules the instruction associated with the given SSA def late
+ *
+ * This function works by first walking all of the uses of the given SSA
+ * definition, ensuring that they are scheduled, and then computing the LCA
+ * (least common ancestor) of its uses.  It then schedules this instruction
+ * as close to the LCA as possible while trying to stay out of loops.
+ */
+static bool
+gcm_schedule_late_def(nir_ssa_def *def, void *void_state)
+{
+   struct gcm_state *state = void_state;
+
+   nir_block *lca = NULL;
+
+   nir_foreach_use(def, use_src) {
+      nir_instr *use_instr = use_src->parent_instr;
+
+      gcm_schedule_late_instr(use_instr, state);
+
+      /* Phi instructions are a bit special.  SSA definitions don't have to
+       * dominate the sources of the phi nodes that use them; instead, they
+       * have to dominate the predecessor block corresponding to the phi
+       * source.  We handle this by looking through the sources, finding
+       * any that are usingg this SSA def, and using those blocks instead
+       * of the one the phi lives in.
+       */
+      if (use_instr->type == nir_instr_type_phi) {
+         nir_phi_instr *phi = nir_instr_as_phi(use_instr);
+
+         nir_foreach_phi_src(phi, phi_src) {
+            if (phi_src->src.ssa == def)
+               lca = nir_dominance_lca(lca, phi_src->pred);
+         }
+      } else {
+         lca = nir_dominance_lca(lca, use_instr->block);
+      }
+   }
+
+   nir_foreach_if_use(def, use_src) {
+      nir_if *if_stmt = use_src->parent_if;
+
+      /* For if statements, we consider the block to be the one immediately
+       * preceding the if CF node.
+       */
+      nir_block *pred_block =
+         nir_cf_node_as_block(nir_cf_node_prev(&if_stmt->cf_node));
+
+      lca = nir_dominance_lca(lca, pred_block);
+   }
+
+   /* Some instructions may never be used.  We'll just leave them scheduled
+    * early and let dead code clean them up.
+    */
+   if (lca == NULL)
+      return true;
+
+   /* We know have the LCA of all of the uses.  If our invariants hold,
+    * this is dominated by the block that we chose when scheduling early.
+    * We now walk up the dominance tree and pick the lowest block that is
+    * as far outside loops as we can get.
+    */
+   nir_block *best = lca;
+   while (lca != def->parent_instr->block) {
+      assert(lca);
+      if (state->blocks[lca->index].loop_depth <
+          state->blocks[best->index].loop_depth)
+         best = lca;
+      lca = lca->imm_dom;
+   }
+   def->parent_instr->block = best;
+
+   return true;
+}
+
+/** Schedules an instruction late
+ *
+ * This function performs a depth-first search starting at the given
+ * instruction and proceeding through its uses to schedule instructions as
+ * late as they can reasonably go in the dominance tree.  The instructions
+ * are "scheduled" by updating their instr->block field.
+ *
+ * The name of this function is actually a bit of a misnomer as it doesn't
+ * schedule them "as late as possible" as the paper implies.  Instead, it
+ * first finds the lates possible place it can schedule the instruction and
+ * then possibly schedules it earlier than that.  The actual location is as
+ * far down the tree as we can go while trying to stay out of loops.
+ */
+static void
+gcm_schedule_late_instr(nir_instr *instr, struct gcm_state *state)
+{
+   if (instr->pass_flags & GCM_INSTR_SCHEDULED_LATE)
+      return;
+
+   instr->pass_flags |= GCM_INSTR_SCHEDULED_LATE;
+
+   /* Pinned instructions are already scheduled so we don't need to do
+    * anything.  Also, bailing here keeps us from ever following phi nodes
+    * which can be back-edges.
+    */
+   if (instr->pass_flags & GCM_INSTR_PINNED)
+      return;
+
+   nir_foreach_ssa_def(instr, gcm_schedule_late_def, state);
+}
+
+static void
+gcm_place_instr(nir_instr *instr, struct gcm_state *state);
+
+static bool
+gcm_place_instr_def(nir_ssa_def *def, void *state)
+{
+   nir_foreach_use(def, use_src)
+      gcm_place_instr(use_src->parent_instr, state);
+
+   return false;
+}
+
+/** Places an instrution back into the program
+ *
+ * The earlier passes of GCM simply choose blocks for each instruction and
+ * otherwise leave them alone.  This pass actually places the instructions
+ * into their chosen blocks.
+ *
+ * To do so, we use a standard post-order depth-first search linearization
+ * algorithm.  We walk over the uses of the given instruction and ensure
+ * that they are placed and then place this instruction.  Because we are
+ * working on multiple blocks at a time, we keep track of the last inserted
+ * instruction per-block in the state structure's block_info array.  When
+ * we insert an instruction in a block we insert it before the last
+ * instruction inserted in that block rather than the last instruction
+ * inserted globally.
+ */
+static void
+gcm_place_instr(nir_instr *instr, struct gcm_state *state)
+{
+   if (instr->pass_flags & GCM_INSTR_PLACED)
+      return;
+
+   instr->pass_flags |= GCM_INSTR_PLACED;
+
+   /* Phi nodes are our once source of back-edges.  Since right now we are
+    * only doing scheduling within blocks, we don't need to worry about
+    * them since they are always at the top.  Just skip them completely.
+    */
+   if (instr->type == nir_instr_type_phi) {
+      assert(instr->pass_flags & GCM_INSTR_PINNED);
+      return;
+   }
+
+   nir_foreach_ssa_def(instr, gcm_place_instr_def, state);
+
+   if (instr->pass_flags & GCM_INSTR_PINNED) {
+      /* Pinned instructions have an implicit dependence on the pinned
+       * instructions that come after them in the block.  Since the pinned
+       * instructions will naturally "chain" together, we only need to
+       * explicitly visit one of them.
+       */
+      for (nir_instr *after = nir_instr_next(instr);
+           after;
+           after = nir_instr_next(after)) {
+         if (after->pass_flags & GCM_INSTR_PINNED) {
+            gcm_place_instr(after, state);
+            break;
+         }
+      }
+   }
+
+   struct gcm_block_info *block_info = &state->blocks[instr->block->index];
+   if (!(instr->pass_flags & GCM_INSTR_PINNED)) {
+      exec_node_remove(&instr->node);
+
+      if (block_info->last_instr) {
+         exec_node_insert_node_before(&block_info->last_instr->node,
+                                      &instr->node);
+      } else {
+         /* Schedule it at the end of the block */
+         nir_instr *jump_instr = nir_block_last_instr(instr->block);
+         if (jump_instr && jump_instr->type == nir_instr_type_jump) {
+            exec_node_insert_node_before(&jump_instr->node, &instr->node);
+         } else {
+            exec_list_push_tail(&instr->block->instr_list, &instr->node);
+         }
+      }
+   }
+
+   block_info->last_instr = instr;
+}
+
+static void
+opt_gcm_impl(nir_function_impl *impl)
+{
+   struct gcm_state state;
+
+   state.impl = impl;
+   state.instr = NULL;
+   exec_list_make_empty(&state.instrs);
+   state.blocks = rzalloc_array(NULL, struct gcm_block_info, impl->num_blocks);
+
+   nir_metadata_require(impl, nir_metadata_block_index |
+                              nir_metadata_dominance);
+
+   gcm_build_block_info(&impl->body, &state, 0);
+   nir_foreach_block(impl, gcm_pin_instructions_block, &state);
+
+   foreach_list_typed(nir_instr, instr, node, &state.instrs)
+      gcm_schedule_early_instr(instr, &state);
+
+   foreach_list_typed(nir_instr, instr, node, &state.instrs)
+      gcm_schedule_late_instr(instr, &state);
+
+   while (!exec_list_is_empty(&state.instrs)) {
+      nir_instr *instr = exec_node_data(nir_instr,
+                                        state.instrs.tail_pred, node);
+      gcm_place_instr(instr, &state);
+   }
+
+   ralloc_free(state.blocks);
+}
+
+void
+nir_opt_gcm(nir_shader *shader)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         opt_gcm_impl(function->impl);
+   }
+}
diff --git a/src/compiler/nir/nir_opt_global_to_local.c b/src/compiler/nir/nir_opt_global_to_local.c
new file mode 100644
index 00000000000..bccb45b6237
--- /dev/null
+++ b/src/compiler/nir/nir_opt_global_to_local.c
@@ -0,0 +1,102 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+
+static bool
+global_to_local(nir_register *reg)
+{
+   nir_function_impl *impl = NULL;
+
+   assert(reg->is_global);
+
+   nir_foreach_def(reg, def_dest) {
+      nir_instr *instr = def_dest->reg.parent_instr;
+      nir_function_impl *instr_impl =
+         nir_cf_node_get_function(&instr->block->cf_node);
+      if (impl != NULL) {
+         if (impl != instr_impl)
+            return false;
+      } else {
+         impl = instr_impl;
+      }
+   }
+
+   nir_foreach_use(reg, use_src) {
+      nir_instr *instr = use_src->parent_instr;
+      nir_function_impl *instr_impl =
+         nir_cf_node_get_function(&instr->block->cf_node);
+      if (impl != NULL) {
+         if (impl != instr_impl)
+            return false;
+      } else {
+         impl = instr_impl;
+      }
+   }
+
+   nir_foreach_if_use(reg, use_src) {
+      nir_if *if_stmt = use_src->parent_if;
+      nir_function_impl *if_impl = nir_cf_node_get_function(&if_stmt->cf_node);
+      if (impl != NULL) {
+         if (impl != if_impl)
+            return false;
+      } else {
+         impl = if_impl;
+      }
+   }
+
+   if (impl == NULL) {
+      /* this instruction is never used/defined, delete it */
+      nir_reg_remove(reg);
+      return true;
+   }
+
+   /*
+    * if we've gotten to this point, the register is always used/defined in
+    * the same implementation so we can move it to be local to that
+    * implementation.
+    */
+
+   exec_node_remove(&reg->node);
+   exec_list_push_tail(&impl->registers, &reg->node);
+   reg->index = impl->reg_alloc++;
+   reg->is_global = false;
+   return true;
+}
+
+bool
+nir_opt_global_to_local(nir_shader *shader)
+{
+   bool progress = false;
+
+   foreach_list_typed_safe(nir_register, reg, node, &shader->registers) {
+      if (global_to_local(reg))
+         progress = true;
+   }
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_opt_peephole_select.c b/src/compiler/nir/nir_opt_peephole_select.c
new file mode 100644
index 00000000000..0fc658df861
--- /dev/null
+++ b/src/compiler/nir/nir_opt_peephole_select.c
@@ -0,0 +1,256 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir.h"
+#include "nir_control_flow.h"
+
+/*
+ * Implements a small peephole optimization that looks for
+ *
+ * if (cond) {
+ *    <empty>
+ * } else {
+ *    <empty>
+ * }
+ * phi
+ * ...
+ * phi
+ *
+ * and replaces it with a series of selects.  It can also handle the case
+ * where, instead of being empty, the if may contain some move operations
+ * whose only use is one of the following phi nodes.  This happens all the
+ * time when the SSA form comes from a conditional assignment with a
+ * swizzle.
+ */
+
+struct peephole_select_state {
+   void *mem_ctx;
+   bool progress;
+};
+
+static bool
+block_check_for_allowed_instrs(nir_block *block)
+{
+   nir_foreach_instr(block, instr) {
+      switch (instr->type) {
+      case nir_instr_type_intrinsic: {
+         nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+
+         switch (intrin->intrinsic) {
+         case nir_intrinsic_load_var:
+            switch (intrin->variables[0]->var->data.mode) {
+            case nir_var_shader_in:
+            case nir_var_uniform:
+               break;
+
+            default:
+               return false;
+            }
+            break;
+
+         default:
+            return false;
+         }
+
+         break;
+      }
+
+      case nir_instr_type_load_const:
+         break;
+
+      case nir_instr_type_alu: {
+         nir_alu_instr *mov = nir_instr_as_alu(instr);
+         switch (mov->op) {
+         case nir_op_fmov:
+         case nir_op_imov:
+         case nir_op_fneg:
+         case nir_op_ineg:
+         case nir_op_fabs:
+         case nir_op_iabs:
+         case nir_op_vec2:
+         case nir_op_vec3:
+         case nir_op_vec4:
+            /* It must be a move-like operation. */
+            break;
+         default:
+            return false;
+         }
+
+         /* Can't handle saturate */
+         if (mov->dest.saturate)
+            return false;
+
+         /* It must be SSA */
+         if (!mov->dest.dest.is_ssa)
+            return false;
+
+         /* It cannot have any if-uses */
+         if (!list_empty(&mov->dest.dest.ssa.if_uses))
+            return false;
+
+         /* The only uses of this definition must be phi's in the successor */
+         nir_foreach_use(&mov->dest.dest.ssa, use) {
+            if (use->parent_instr->type != nir_instr_type_phi ||
+                use->parent_instr->block != block->successors[0])
+               return false;
+         }
+         break;
+      }
+
+      default:
+         return false;
+      }
+   }
+
+   return true;
+}
+
+static bool
+nir_opt_peephole_select_block(nir_block *block, void *void_state)
+{
+   struct peephole_select_state *state = void_state;
+
+   /* If the block is empty, then it certainly doesn't have any phi nodes,
+    * so we can skip it.  This also ensures that we do an early skip on the
+    * end block of the function which isn't actually attached to the CFG.
+    */
+   if (exec_list_is_empty(&block->instr_list))
+      return true;
+
+   if (nir_cf_node_is_first(&block->cf_node))
+      return true;
+
+   nir_cf_node *prev_node = nir_cf_node_prev(&block->cf_node);
+   if (prev_node->type != nir_cf_node_if)
+      return true;
+
+   nir_if *if_stmt = nir_cf_node_as_if(prev_node);
+   nir_cf_node *then_node = nir_if_first_then_node(if_stmt);
+   nir_cf_node *else_node = nir_if_first_else_node(if_stmt);
+
+   /* We can only have one block in each side ... */
+   if (nir_if_last_then_node(if_stmt) != then_node ||
+       nir_if_last_else_node(if_stmt) != else_node)
+      return true;
+
+   nir_block *then_block = nir_cf_node_as_block(then_node);
+   nir_block *else_block = nir_cf_node_as_block(else_node);
+
+   /* ... and those blocks must only contain "allowed" instructions. */
+   if (!block_check_for_allowed_instrs(then_block) ||
+       !block_check_for_allowed_instrs(else_block))
+      return true;
+
+   /* At this point, we know that the previous CFG node is an if-then
+    * statement containing only moves to phi nodes in this block.  We can
+    * just remove that entire CF node and replace all of the phi nodes with
+    * selects.
+    */
+
+   nir_block *prev_block = nir_cf_node_as_block(nir_cf_node_prev(prev_node));
+   assert(prev_block->cf_node.type == nir_cf_node_block);
+
+   /* First, we move the remaining instructions from the blocks to the
+    * block before.  We have already guaranteed that this is safe by
+    * calling block_check_for_allowed_instrs()
+    */
+   nir_foreach_instr_safe(then_block, instr) {
+      exec_node_remove(&instr->node);
+      instr->block = prev_block;
+      exec_list_push_tail(&prev_block->instr_list, &instr->node);
+   }
+
+   nir_foreach_instr_safe(else_block, instr) {
+      exec_node_remove(&instr->node);
+      instr->block = prev_block;
+      exec_list_push_tail(&prev_block->instr_list, &instr->node);
+   }
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_phi)
+         break;
+
+      nir_phi_instr *phi = nir_instr_as_phi(instr);
+      nir_alu_instr *sel = nir_alu_instr_create(state->mem_ctx, nir_op_bcsel);
+      nir_src_copy(&sel->src[0].src, &if_stmt->condition, sel);
+      /* Splat the condition to all channels */
+      memset(sel->src[0].swizzle, 0, sizeof sel->src[0].swizzle);
+
+      assert(exec_list_length(&phi->srcs) == 2);
+      nir_foreach_phi_src(phi, src) {
+         assert(src->pred == then_block || src->pred == else_block);
+         assert(src->src.is_ssa);
+
+         unsigned idx = src->pred == then_block ? 1 : 2;
+         nir_src_copy(&sel->src[idx].src, &src->src, sel);
+      }
+
+      nir_ssa_dest_init(&sel->instr, &sel->dest.dest,
+                        phi->dest.ssa.num_components, phi->dest.ssa.name);
+      sel->dest.write_mask = (1 << phi->dest.ssa.num_components) - 1;
+
+      nir_ssa_def_rewrite_uses(&phi->dest.ssa,
+                               nir_src_for_ssa(&sel->dest.dest.ssa));
+
+      nir_instr_insert_before(&phi->instr, &sel->instr);
+      nir_instr_remove(&phi->instr);
+   }
+
+   nir_cf_node_remove(&if_stmt->cf_node);
+   state->progress = true;
+
+   return true;
+}
+
+static bool
+nir_opt_peephole_select_impl(nir_function_impl *impl)
+{
+   struct peephole_select_state state;
+
+   state.mem_ctx = ralloc_parent(impl);
+   state.progress = false;
+
+   nir_foreach_block(impl, nir_opt_peephole_select_block, &state);
+
+   if (state.progress)
+      nir_metadata_preserve(impl, nir_metadata_none);
+
+   return state.progress;
+}
+
+bool
+nir_opt_peephole_select(nir_shader *shader)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         progress |= nir_opt_peephole_select_impl(function->impl);
+   }
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_opt_remove_phis.c b/src/compiler/nir/nir_opt_remove_phis.c
new file mode 100644
index 00000000000..646183707bd
--- /dev/null
+++ b/src/compiler/nir/nir_opt_remove_phis.c
@@ -0,0 +1,130 @@
+/*
+ * Copyright © 2015 Connor Abbott
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+
+/*
+ * This is a pass for removing phi nodes that look like:
+ * a = phi(b, b, b, ...)
+ *
+ * Note that we can't ignore undef sources here, or else we may create a
+ * situation where the definition of b isn't dominated by its uses. We're
+ * allowed to do this since the definition of b must dominate all of the
+ * phi node's predecessors, which means it must dominate the phi node as well
+ * as all of the phi node's uses. In essence, the phi node acts as a copy
+ * instruction. b can't be another phi node in the same block, since the only
+ * time when phi nodes can source other phi nodes defined in the same block is
+ * at the loop header, and in that case one of the sources of the phi has to
+ * be from before the loop and that source can't be b.
+ */
+
+static bool
+remove_phis_block(nir_block *block, void *state)
+{
+   bool *progress = state;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_phi)
+         break;
+
+      nir_phi_instr *phi = nir_instr_as_phi(instr);
+
+      nir_ssa_def *def = NULL;
+      bool srcs_same = true;
+
+      nir_foreach_phi_src(phi, src) {
+         assert(src->src.is_ssa);
+
+         /* For phi nodes at the beginning of loops, we may encounter some
+          * sources from backedges that point back to the destination of the
+          * same phi, i.e. something like:
+          *
+          * a = phi(a, b, ...)
+          *
+          * We can safely ignore these sources, since if all of the normal
+          * sources point to the same definition, then that definition must
+          * still dominate the phi node, and the phi will still always take
+          * the value of that definition.
+          */
+         if (src->src.ssa == &phi->dest.ssa)
+            continue;
+         
+         if (def == NULL) {
+            def  = src->src.ssa;
+         } else {
+            if (src->src.ssa != def) {
+               srcs_same = false;
+               break;
+            }
+         }
+      }
+
+      if (!srcs_same)
+         continue;
+
+      /* We must have found at least one definition, since there must be at
+       * least one forward edge.
+       */
+      assert(def != NULL);
+
+      assert(phi->dest.is_ssa);
+      nir_ssa_def_rewrite_uses(&phi->dest.ssa, nir_src_for_ssa(def));
+      nir_instr_remove(instr);
+
+      *progress = true;
+   }
+
+   return true;
+}
+
+static bool
+remove_phis_impl(nir_function_impl *impl)
+{
+   bool progress = false;
+
+   nir_foreach_block(impl, remove_phis_block, &progress);
+
+   if (progress) {
+      nir_metadata_preserve(impl, nir_metadata_block_index |
+                                  nir_metadata_dominance);
+   }
+
+   return progress;
+}
+
+bool
+nir_opt_remove_phis(nir_shader *shader)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function)
+      if (function->impl)
+         progress = remove_phis_impl(function->impl) || progress;
+
+   return progress;
+}
+
diff --git a/src/compiler/nir/nir_opt_undef.c b/src/compiler/nir/nir_opt_undef.c
new file mode 100644
index 00000000000..374564d34c5
--- /dev/null
+++ b/src/compiler/nir/nir_opt_undef.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright © 2015 Broadcom
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "nir.h"
+
+/** @file nir_opt_undef.c
+ *
+ * Handles optimization of operations involving ssa_undef.  For now, we just
+ * make sure that csels between undef and some other value just give the other
+ * value (on the assumption that the condition's going to be choosing the
+ * defined value).  This reduces work after if flattening when each side of
+ * the if is defining a variable.
+ *
+ * Some day, we may find some use for making other operations consuming an
+ * undef arg output undef, but I don't know of any cases currently.
+ */
+
+static bool
+opt_undef_alu(nir_alu_instr *instr)
+{
+   if (instr->op != nir_op_bcsel && instr->op != nir_op_fcsel)
+      return false;
+
+   assert(instr->dest.dest.is_ssa);
+
+   for (int i = 1; i <= 2; i++) {
+      if (!instr->src[i].src.is_ssa)
+         continue;
+
+      nir_instr *parent = instr->src[i].src.ssa->parent_instr;
+      if (parent->type != nir_instr_type_ssa_undef)
+         continue;
+
+      /* We can't just use nir_alu_src_copy, because we need the def/use
+       * updated.
+       */
+      nir_instr_rewrite_src(&instr->instr, &instr->src[0].src,
+                            instr->src[i == 1 ? 2 : 1].src);
+      nir_alu_src_copy(&instr->src[0], &instr->src[i == 1 ? 2 : 1],
+                       ralloc_parent(instr));
+
+      nir_src empty_src;
+      memset(&empty_src, 0, sizeof(empty_src));
+      nir_instr_rewrite_src(&instr->instr, &instr->src[1].src, empty_src);
+      nir_instr_rewrite_src(&instr->instr, &instr->src[2].src, empty_src);
+      instr->op = nir_op_imov;
+
+      return true;
+   }
+
+   return false;
+}
+
+static bool
+opt_undef_block(nir_block *block, void *data)
+{
+   bool *progress = data;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type == nir_instr_type_alu)
+         if (opt_undef_alu(nir_instr_as_alu(instr)))
+             (*progress) = true;
+   }
+
+   return true;
+}
+
+bool
+nir_opt_undef(nir_shader *shader)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl) {
+         nir_foreach_block(function->impl, opt_undef_block, &progress);
+         if (progress)
+            nir_metadata_preserve(function->impl,
+                                  nir_metadata_block_index |
+                                  nir_metadata_dominance);
+      }
+   }
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_phi_builder.c b/src/compiler/nir/nir_phi_builder.c
new file mode 100644
index 00000000000..5429083e5c8
--- /dev/null
+++ b/src/compiler/nir/nir_phi_builder.c
@@ -0,0 +1,254 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "nir_phi_builder.h"
+#include "nir/nir_vla.h"
+
+struct nir_phi_builder {
+   nir_shader *shader;
+   nir_function_impl *impl;
+
+   /* Copied from the impl for easy access */
+   unsigned num_blocks;
+
+   /* Array of all blocks indexed by block->index. */
+   nir_block **blocks;
+
+   /* Hold on to the values so we can easily iterate over them. */
+   struct exec_list values;
+
+   /* Worklist for phi adding */
+   unsigned iter_count;
+   unsigned *work;
+   nir_block **W;
+};
+
+#define NEEDS_PHI ((nir_ssa_def *)(intptr_t)-1)
+
+struct nir_phi_builder_value {
+   struct exec_node node;
+
+   struct nir_phi_builder *builder;
+
+   /* Needed so we can create phis and undefs */
+   unsigned num_components;
+
+   /* The list of phi nodes associated with this value.  Phi nodes are not
+    * added directly.  Instead, they are created, the instr->block pointer
+    * set, and then added to this list.  Later, in phi_builder_finish, we
+    * set up their sources and add them to the top of their respective
+    * blocks.
+    */
+   struct exec_list phis;
+
+   /* Array of SSA defs, indexed by block.  If a phi needs to be inserted
+    * in a given block, it will have the magic value NEEDS_PHI.
+    */
+   nir_ssa_def *defs[0];
+};
+
+static bool
+fill_block_array(nir_block *block, void *void_data)
+{
+   nir_block **blocks = void_data;
+   blocks[block->index] = block;
+   return true;
+}
+
+struct nir_phi_builder *
+nir_phi_builder_create(nir_function_impl *impl)
+{
+   struct nir_phi_builder *pb = ralloc(NULL, struct nir_phi_builder);
+
+   pb->shader = impl->function->shader;
+   pb->impl = impl;
+
+   assert(impl->valid_metadata & (nir_metadata_block_index |
+                                  nir_metadata_dominance));
+
+   pb->num_blocks = impl->num_blocks;
+   pb->blocks = ralloc_array(pb, nir_block *, pb->num_blocks);
+   nir_foreach_block(impl, fill_block_array, pb->blocks);
+
+   exec_list_make_empty(&pb->values);
+
+   pb->iter_count = 0;
+   pb->work = rzalloc_array(pb, unsigned, pb->num_blocks);
+   pb->W = ralloc_array(pb, nir_block *, pb->num_blocks);
+
+   return pb;
+}
+
+struct nir_phi_builder_value *
+nir_phi_builder_add_value(struct nir_phi_builder *pb, unsigned num_components,
+                          const BITSET_WORD *defs)
+{
+   struct nir_phi_builder_value *val;
+   unsigned i, w_start = 0, w_end = 0;
+
+   val = rzalloc_size(pb, sizeof(*val) + sizeof(val->defs[0]) * pb->num_blocks);
+   val->builder = pb;
+   val->num_components = num_components;
+   exec_list_make_empty(&val->phis);
+   exec_list_push_tail(&pb->values, &val->node);
+
+   pb->iter_count++;
+
+   BITSET_WORD tmp;
+   BITSET_FOREACH_SET(i, tmp, defs, pb->num_blocks) {
+      if (pb->work[i] < pb->iter_count)
+         pb->W[w_end++] = pb->blocks[i];
+      pb->work[i] = pb->iter_count;
+   }
+
+   while (w_start != w_end) {
+      nir_block *cur = pb->W[w_start++];
+      struct set_entry *dom_entry;
+      set_foreach(cur->dom_frontier, dom_entry) {
+         nir_block *next = (nir_block *) dom_entry->key;
+
+         /*
+          * If there's more than one return statement, then the end block
+          * can be a join point for some definitions. However, there are
+          * no instructions in the end block, so nothing would use those
+          * phi nodes. Of course, we couldn't place those phi nodes
+          * anyways due to the restriction of having no instructions in the
+          * end block...
+          */
+         if (next == pb->impl->end_block)
+            continue;
+
+         if (val->defs[next->index] == NULL) {
+            val->defs[next->index] = NEEDS_PHI;
+
+            if (pb->work[next->index] < pb->iter_count) {
+               pb->work[next->index] = pb->iter_count;
+               pb->W[w_end++] = next;
+            }
+         }
+      }
+   }
+
+   return val;
+}
+
+void
+nir_phi_builder_value_set_block_def(struct nir_phi_builder_value *val,
+                                    nir_block *block, nir_ssa_def *def)
+{
+   val->defs[block->index] = def;
+}
+
+nir_ssa_def *
+nir_phi_builder_value_get_block_def(struct nir_phi_builder_value *val,
+                                    nir_block *block)
+{
+   if (val->defs[block->index] == NULL) {
+      if (block->imm_dom) {
+         /* Grab it from our immediate dominator.  We'll stash it here for
+          * easy access later.
+          */
+         val->defs[block->index] =
+            nir_phi_builder_value_get_block_def(val, block->imm_dom);
+         return val->defs[block->index];
+      } else {
+         /* No immediate dominator means that this block is either the
+          * start block or unreachable.  In either case, the value is
+          * undefined so we need an SSA undef.
+          */
+         nir_ssa_undef_instr *undef =
+            nir_ssa_undef_instr_create(val->builder->shader,
+                                       val->num_components);
+         nir_instr_insert(nir_before_cf_list(&val->builder->impl->body),
+                          &undef->instr);
+         val->defs[block->index] = &undef->def;
+         return &undef->def;
+      }
+   } else if (val->defs[block->index] == NEEDS_PHI) {
+      /* If we need a phi instruction, go ahead and create one but don't
+       * add it to the program yet.  Later, we'll go through and set up phi
+       * sources and add the instructions will be added at that time.
+       */
+      nir_phi_instr *phi = nir_phi_instr_create(val->builder->shader);
+      nir_ssa_dest_init(&phi->instr, &phi->dest, val->num_components, NULL);
+      phi->instr.block = block;
+      exec_list_push_tail(&val->phis, &phi->instr.node);
+      val->defs[block->index] = &phi->dest.ssa;
+      return &phi->dest.ssa;
+   } else {
+      return val->defs[block->index];
+   }
+}
+
+static int
+compare_blocks(const void *_a, const void *_b)
+{
+   nir_block * const * a = _a;
+   nir_block * const * b = _b;
+
+   return (*a)->index - (*b)->index;
+}
+
+void
+nir_phi_builder_finish(struct nir_phi_builder *pb)
+{
+   const unsigned num_blocks = pb->num_blocks;
+   NIR_VLA(nir_block *, preds, num_blocks);
+
+   foreach_list_typed(struct nir_phi_builder_value, val, node, &pb->values) {
+      /* We can't iterate over the list of phis normally because we are
+       * removing them as we go and, in some cases, adding new phis as we
+       * build the source lists of others.
+       */
+      while (!exec_list_is_empty(&val->phis)) {
+         struct exec_node *head = exec_list_get_head(&val->phis);
+         nir_phi_instr *phi = exec_node_data(nir_phi_instr, head, instr.node);
+         assert(phi->instr.type == nir_instr_type_phi);
+
+         exec_node_remove(&phi->instr.node);
+
+         /* Construct an array of predecessors.  We sort it to ensure
+          * determinism in the phi insertion algorithm.
+          *
+          * XXX: Calling qsort this many times seems expensive.
+          */
+         int num_preds = 0;
+         struct set_entry *entry;
+         set_foreach(phi->instr.block->predecessors, entry)
+            preds[num_preds++] = (nir_block *)entry->key;
+         qsort(preds, num_preds, sizeof(*preds), compare_blocks);
+
+         for (unsigned i = 0; i < num_preds; i++) {
+            nir_phi_src *src = ralloc(phi, nir_phi_src);
+            src->pred = preds[i];
+            src->src = nir_src_for_ssa(
+               nir_phi_builder_value_get_block_def(val, preds[i]));
+            exec_list_push_tail(&phi->srcs, &src->node);
+         }
+
+         nir_instr_insert(nir_before_block(phi->instr.block), &phi->instr);
+      }
+   }
+
+   ralloc_free(pb);
+}
diff --git a/src/compiler/nir/nir_phi_builder.h b/src/compiler/nir/nir_phi_builder.h
new file mode 100644
index 00000000000..50251bf1ba3
--- /dev/null
+++ b/src/compiler/nir/nir_phi_builder.h
@@ -0,0 +1,84 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#pragma once
+
+#include "nir.h"
+
+struct nir_phi_builder;
+struct nir_phi_builder_value;
+
+/* Create a new phi builder.
+ *
+ * While this is fairly cheap, it does allocate some memory and walk the list
+ * of blocks so it's recommended that you only call it once and use it to
+ * build phis for several values.
+ */
+struct nir_phi_builder *nir_phi_builder_create(nir_function_impl *impl);
+
+/* Register a value with the builder.
+ *
+ * The 'defs' parameter specifies a bitset of blocks in which the given value
+ * is defined.  This is used to determine where to place the phi nodes.
+ */
+struct nir_phi_builder_value *
+nir_phi_builder_add_value(struct nir_phi_builder *pb, unsigned num_components,
+                          const BITSET_WORD *defs);
+
+/* Register a definition for the given value and block.
+ *
+ * It is safe to call this function as many times as you wish for any given
+ * block/value pair.  However, it always replaces whatever was there
+ * previously even if that definition is from a phi node.  The phi builder
+ * always uses the latest information it has, so you must be careful about the
+ * order in which you register definitions.  The final value at the end of the
+ * block must be the last value registered.
+ */
+void
+nir_phi_builder_value_set_block_def(struct nir_phi_builder_value *val,
+                                    nir_block *block, nir_ssa_def *def);
+
+/* Get the definition for the given value in the given block.
+ *
+ * This definition will always be the latest definition known for the given
+ * block.  If no definition is immediately available, it will crawl up the
+ * dominance tree and insert phi nodes as needed until it finds one.  In the
+ * case that no suitable definition is found, it will return the result of a
+ * nir_ssa_undef_instr with the correct number of components.
+ *
+ * Because this function only uses the latest available information for any
+ * given block, you must have already finished registering definitions for any
+ * blocks that dominate the current block in order to get the correct result.
+ */
+nir_ssa_def *
+nir_phi_builder_value_get_block_def(struct nir_phi_builder_value *val,
+                                    nir_block *block);
+
+/* Finish building phi nodes and free the builder.
+ *
+ * This function does far more than just free memory.  Prior to calling
+ * nir_phi_builder_finish, no phi nodes have actually been inserted in the
+ * program.  This function is what finishes setting up phi node sources and
+ * adds the phi nodes to the program.
+ */
+void nir_phi_builder_finish(struct nir_phi_builder *pb);
diff --git a/src/compiler/nir/nir_print.c b/src/compiler/nir/nir_print.c
new file mode 100644
index 00000000000..f36b91de6e0
--- /dev/null
+++ b/src/compiler/nir/nir_print.c
@@ -0,0 +1,1089 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+#include "compiler/shader_enums.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+static void
+print_tabs(unsigned num_tabs, FILE *fp)
+{
+   for (unsigned i = 0; i < num_tabs; i++)
+      fprintf(fp, "\t");
+}
+
+typedef struct {
+   FILE *fp;
+   nir_shader *shader;
+   /** map from nir_variable -> printable name */
+   struct hash_table *ht;
+
+   /** set of names used so far for nir_variables */
+   struct set *syms;
+
+   /* an index used to make new non-conflicting names */
+   unsigned index;
+} print_state;
+
+static void
+print_register(nir_register *reg, print_state *state)
+{
+   FILE *fp = state->fp;
+   if (reg->name != NULL)
+      fprintf(fp, "/* %s */ ", reg->name);
+   if (reg->is_global)
+      fprintf(fp, "gr%u", reg->index);
+   else
+      fprintf(fp, "r%u", reg->index);
+}
+
+static const char *sizes[] = { "error", "vec1", "vec2", "vec3", "vec4" };
+
+static void
+print_register_decl(nir_register *reg, print_state *state)
+{
+   FILE *fp = state->fp;
+   fprintf(fp, "decl_reg %s ", sizes[reg->num_components]);
+   if (reg->is_packed)
+      fprintf(fp, "(packed) ");
+   print_register(reg, state);
+   if (reg->num_array_elems != 0)
+      fprintf(fp, "[%u]", reg->num_array_elems);
+   fprintf(fp, "\n");
+}
+
+static void
+print_ssa_def(nir_ssa_def *def, print_state *state)
+{
+   FILE *fp = state->fp;
+   if (def->name != NULL)
+      fprintf(fp, "/* %s */ ", def->name);
+   fprintf(fp, "%s ssa_%u", sizes[def->num_components], def->index);
+}
+
+static void
+print_ssa_use(nir_ssa_def *def, print_state *state)
+{
+   FILE *fp = state->fp;
+   if (def->name != NULL)
+      fprintf(fp, "/* %s */ ", def->name);
+   fprintf(fp, "ssa_%u", def->index);
+}
+
+static void print_src(nir_src *src, print_state *state);
+
+static void
+print_reg_src(nir_reg_src *src, print_state *state)
+{
+   FILE *fp = state->fp;
+   print_register(src->reg, state);
+   if (src->reg->num_array_elems != 0) {
+      fprintf(fp, "[%u", src->base_offset);
+      if (src->indirect != NULL) {
+         fprintf(fp, " + ");
+         print_src(src->indirect, state);
+      }
+      fprintf(fp, "]");
+   }
+}
+
+static void
+print_reg_dest(nir_reg_dest *dest, print_state *state)
+{
+   FILE *fp = state->fp;
+   print_register(dest->reg, state);
+   if (dest->reg->num_array_elems != 0) {
+      fprintf(fp, "[%u", dest->base_offset);
+      if (dest->indirect != NULL) {
+         fprintf(fp, " + ");
+         print_src(dest->indirect, state);
+      }
+      fprintf(fp, "]");
+   }
+}
+
+static void
+print_src(nir_src *src, print_state *state)
+{
+   if (src->is_ssa)
+      print_ssa_use(src->ssa, state);
+   else
+      print_reg_src(&src->reg, state);
+}
+
+static void
+print_dest(nir_dest *dest, print_state *state)
+{
+   if (dest->is_ssa)
+      print_ssa_def(&dest->ssa, state);
+   else
+      print_reg_dest(&dest->reg, state);
+}
+
+static void
+print_alu_src(nir_alu_instr *instr, unsigned src, print_state *state)
+{
+   FILE *fp = state->fp;
+
+   if (instr->src[src].negate)
+      fprintf(fp, "-");
+   if (instr->src[src].abs)
+      fprintf(fp, "abs(");
+
+   print_src(&instr->src[src].src, state);
+
+   bool print_swizzle = false;
+   for (unsigned i = 0; i < 4; i++) {
+      if (!nir_alu_instr_channel_used(instr, src, i))
+         continue;
+
+      if (instr->src[src].swizzle[i] != i) {
+         print_swizzle = true;
+         break;
+      }
+   }
+
+   if (print_swizzle) {
+      fprintf(fp, ".");
+      for (unsigned i = 0; i < 4; i++) {
+         if (!nir_alu_instr_channel_used(instr, src, i))
+            continue;
+
+         fprintf(fp, "%c", "xyzw"[instr->src[src].swizzle[i]]);
+      }
+   }
+
+   if (instr->src[src].abs)
+      fprintf(fp, ")");
+}
+
+static void
+print_alu_dest(nir_alu_dest *dest, print_state *state)
+{
+   FILE *fp = state->fp;
+   /* we're going to print the saturate modifier later, after the opcode */
+
+   print_dest(&dest->dest, state);
+
+   if (!dest->dest.is_ssa &&
+       dest->write_mask != (1 << dest->dest.reg.reg->num_components) - 1) {
+      fprintf(fp, ".");
+      for (unsigned i = 0; i < 4; i++)
+         if ((dest->write_mask >> i) & 1)
+            fprintf(fp, "%c", "xyzw"[i]);
+   }
+}
+
+static void
+print_alu_instr(nir_alu_instr *instr, print_state *state)
+{
+   FILE *fp = state->fp;
+
+   print_alu_dest(&instr->dest, state);
+
+   fprintf(fp, " = %s", nir_op_infos[instr->op].name);
+   if (instr->dest.saturate)
+      fprintf(fp, ".sat");
+   fprintf(fp, " ");
+
+   for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) {
+      if (i != 0)
+         fprintf(fp, ", ");
+
+      print_alu_src(instr, i, state);
+   }
+}
+
+static const char *
+get_var_name(nir_variable *var, print_state *state)
+{
+   if (state->ht == NULL)
+      return var->name;
+
+   assert(state->syms);
+
+   struct hash_entry *entry = _mesa_hash_table_search(state->ht, var);
+   if (entry)
+      return entry->data;
+
+   char *name;
+   if (var->name == NULL) {
+      name = ralloc_asprintf(state->syms, "@%u", state->index++);
+   } else {
+      struct set_entry *set_entry = _mesa_set_search(state->syms, var->name);
+      if (set_entry != NULL) {
+         /* we have a collision with another name, append an @ + a unique
+          * index */
+         name = ralloc_asprintf(state->syms, "%s@%u", var->name,
+                                state->index++);
+      } else {
+         /* Mark this one as seen */
+         _mesa_set_add(state->syms, var->name);
+         name = var->name;
+      }
+   }
+
+   _mesa_hash_table_insert(state->ht, var, name);
+
+   return name;
+}
+
+static void
+print_constant(nir_constant *c, const struct glsl_type *type, print_state *state)
+{
+   FILE *fp = state->fp;
+   unsigned total_elems = glsl_get_components(type);
+   unsigned i;
+
+   switch (glsl_get_base_type(type)) {
+   case GLSL_TYPE_UINT:
+   case GLSL_TYPE_INT:
+   case GLSL_TYPE_BOOL:
+      for (i = 0; i < total_elems; i++) {
+         if (i > 0) fprintf(fp, ", ");
+         fprintf(fp, "0x%08x", c->value.u[i]);
+      }
+      break;
+
+   case GLSL_TYPE_FLOAT:
+      for (i = 0; i < total_elems; i++) {
+         if (i > 0) fprintf(fp, ", ");
+         fprintf(fp, "%f", c->value.f[i]);
+      }
+      break;
+
+   case GLSL_TYPE_STRUCT:
+      for (i = 0; i < c->num_elements; i++) {
+         if (i > 0) fprintf(fp, ", ");
+         fprintf(fp, "{ ");
+         print_constant(c->elements[i], glsl_get_struct_field(type, i), state);
+         fprintf(fp, " }");
+      }
+      break;
+
+   case GLSL_TYPE_ARRAY:
+      for (i = 0; i < c->num_elements; i++) {
+         if (i > 0) fprintf(fp, ", ");
+         fprintf(fp, "{ ");
+         print_constant(c->elements[i], glsl_get_array_element(type), state);
+         fprintf(fp, " }");
+      }
+      break;
+
+   default:
+      unreachable("not reached");
+   }
+}
+
+static void
+print_var_decl(nir_variable *var, print_state *state)
+{
+   FILE *fp = state->fp;
+
+   fprintf(fp, "decl_var ");
+
+   const char *const cent = (var->data.centroid) ? "centroid " : "";
+   const char *const samp = (var->data.sample) ? "sample " : "";
+   const char *const patch = (var->data.patch) ? "patch " : "";
+   const char *const inv = (var->data.invariant) ? "invariant " : "";
+   const char *const mode[] = { "shader_in ", "shader_out ", "", "",
+                                "uniform ", "shader_storage ", "shared ",
+                                "system "};
+
+   fprintf(fp, "%s%s%s%s%s%s ",
+      cent, samp, patch, inv, mode[var->data.mode],
+	  glsl_interp_qualifier_name(var->data.interpolation));
+
+   glsl_print_type(var->type, fp);
+
+   fprintf(fp, " %s", get_var_name(var, state));
+
+   if (var->data.mode == nir_var_shader_in ||
+       var->data.mode == nir_var_shader_out ||
+       var->data.mode == nir_var_uniform ||
+       var->data.mode == nir_var_shader_storage) {
+      const char *loc = NULL;
+      char buf[4];
+
+      switch (state->shader->stage) {
+      case MESA_SHADER_VERTEX:
+         if (var->data.mode == nir_var_shader_in)
+            loc = gl_vert_attrib_name(var->data.location);
+         else if (var->data.mode == nir_var_shader_out)
+            loc = gl_varying_slot_name(var->data.location);
+         break;
+      case MESA_SHADER_GEOMETRY:
+         if ((var->data.mode == nir_var_shader_in) ||
+             (var->data.mode == nir_var_shader_out))
+            loc = gl_varying_slot_name(var->data.location);
+         break;
+      case MESA_SHADER_FRAGMENT:
+         if (var->data.mode == nir_var_shader_in)
+            loc = gl_varying_slot_name(var->data.location);
+         else if (var->data.mode == nir_var_shader_out)
+            loc = gl_frag_result_name(var->data.location);
+         break;
+      case MESA_SHADER_TESS_CTRL:
+      case MESA_SHADER_TESS_EVAL:
+      case MESA_SHADER_COMPUTE:
+      default:
+         /* TODO */
+         break;
+      }
+
+      if (!loc) {
+         snprintf(buf, sizeof(buf), "%u", var->data.location);
+         loc = buf;
+      }
+
+      fprintf(fp, " (%s, %u)", loc, var->data.driver_location);
+   }
+
+   if (var->constant_initializer) {
+      fprintf(fp, " = { ");
+      print_constant(var->constant_initializer, var->type, state);
+      fprintf(fp, " }");
+   }
+
+   fprintf(fp, "\n");
+}
+
+static void
+print_var(nir_variable *var, print_state *state)
+{
+   FILE *fp = state->fp;
+   fprintf(fp, "%s", get_var_name(var, state));
+}
+
+static void
+print_deref_var(nir_deref_var *deref, print_state *state)
+{
+   print_var(deref->var, state);
+}
+
+static void
+print_deref_array(nir_deref_array *deref, print_state *state)
+{
+   FILE *fp = state->fp;
+   fprintf(fp, "[");
+   switch (deref->deref_array_type) {
+   case nir_deref_array_type_direct:
+      fprintf(fp, "%u", deref->base_offset);
+      break;
+   case nir_deref_array_type_indirect:
+      if (deref->base_offset != 0)
+         fprintf(fp, "%u + ", deref->base_offset);
+      print_src(&deref->indirect, state);
+      break;
+   case nir_deref_array_type_wildcard:
+      fprintf(fp, "*");
+      break;
+   }
+   fprintf(fp, "]");
+}
+
+static void
+print_deref_struct(nir_deref_struct *deref, const struct glsl_type *parent_type,
+                   print_state *state)
+{
+   FILE *fp = state->fp;
+   fprintf(fp, ".%s", glsl_get_struct_elem_name(parent_type, deref->index));
+}
+
+static void
+print_deref(nir_deref_var *deref, print_state *state)
+{
+   nir_deref *tail = &deref->deref;
+   nir_deref *pretail = NULL;
+   while (tail != NULL) {
+      switch (tail->deref_type) {
+      case nir_deref_type_var:
+         assert(pretail == NULL);
+         assert(tail == &deref->deref);
+         print_deref_var(deref, state);
+         break;
+
+      case nir_deref_type_array:
+         assert(pretail != NULL);
+         print_deref_array(nir_deref_as_array(tail), state);
+         break;
+
+      case nir_deref_type_struct:
+         assert(pretail != NULL);
+         print_deref_struct(nir_deref_as_struct(tail),
+                            pretail->type, state);
+         break;
+
+      default:
+         unreachable("Invalid deref type");
+      }
+
+      pretail = tail;
+      tail = pretail->child;
+   }
+}
+
+static void
+print_intrinsic_instr(nir_intrinsic_instr *instr, print_state *state)
+{
+   unsigned num_srcs = nir_intrinsic_infos[instr->intrinsic].num_srcs;
+   FILE *fp = state->fp;
+
+   if (nir_intrinsic_infos[instr->intrinsic].has_dest) {
+      print_dest(&instr->dest, state);
+      fprintf(fp, " = ");
+   }
+
+   fprintf(fp, "intrinsic %s (", nir_intrinsic_infos[instr->intrinsic].name);
+
+   for (unsigned i = 0; i < num_srcs; i++) {
+      if (i != 0)
+         fprintf(fp, ", ");
+
+      print_src(&instr->src[i], state);
+   }
+
+   fprintf(fp, ") (");
+
+   unsigned num_vars = nir_intrinsic_infos[instr->intrinsic].num_variables;
+
+   for (unsigned i = 0; i < num_vars; i++) {
+      if (i != 0)
+         fprintf(fp, ", ");
+
+      print_deref(instr->variables[i], state);
+   }
+
+   fprintf(fp, ") (");
+
+   unsigned num_indices = nir_intrinsic_infos[instr->intrinsic].num_indices;
+
+   for (unsigned i = 0; i < num_indices; i++) {
+      if (i != 0)
+         fprintf(fp, ", ");
+
+      fprintf(fp, "%d", instr->const_index[i]);
+   }
+
+   fprintf(fp, ")");
+
+   if (!state->shader)
+      return;
+
+   struct exec_list *var_list = NULL;
+
+   switch (instr->intrinsic) {
+   case nir_intrinsic_load_uniform:
+      var_list = &state->shader->uniforms;
+      break;
+   case nir_intrinsic_load_input:
+   case nir_intrinsic_load_per_vertex_input:
+      var_list = &state->shader->inputs;
+      break;
+   case nir_intrinsic_load_output:
+   case nir_intrinsic_store_output:
+   case nir_intrinsic_store_per_vertex_output:
+      var_list = &state->shader->outputs;
+      break;
+   default:
+      return;
+   }
+
+   nir_foreach_variable(var, var_list) {
+      if ((var->data.driver_location == instr->const_index[0]) &&
+          var->name) {
+         fprintf(fp, "\t/* %s */", var->name);
+         break;
+      }
+   }
+}
+
+static void
+print_tex_instr(nir_tex_instr *instr, print_state *state)
+{
+   FILE *fp = state->fp;
+
+   print_dest(&instr->dest, state);
+
+   fprintf(fp, " = ");
+
+   switch (instr->op) {
+   case nir_texop_tex:
+      fprintf(fp, "tex ");
+      break;
+   case nir_texop_txb:
+      fprintf(fp, "txb ");
+      break;
+   case nir_texop_txl:
+      fprintf(fp, "txl ");
+      break;
+   case nir_texop_txd:
+      fprintf(fp, "txd ");
+      break;
+   case nir_texop_txf:
+      fprintf(fp, "txf ");
+      break;
+   case nir_texop_txf_ms:
+      fprintf(fp, "txf_ms ");
+      break;
+   case nir_texop_txs:
+      fprintf(fp, "txs ");
+      break;
+   case nir_texop_lod:
+      fprintf(fp, "lod ");
+      break;
+   case nir_texop_tg4:
+      fprintf(fp, "tg4 ");
+      break;
+   case nir_texop_query_levels:
+      fprintf(fp, "query_levels ");
+      break;
+   case nir_texop_texture_samples:
+      fprintf(fp, "texture_samples ");
+      break;
+   case nir_texop_samples_identical:
+      fprintf(fp, "samples_identical ");
+      break;
+   default:
+      unreachable("Invalid texture operation");
+      break;
+   }
+
+   for (unsigned i = 0; i < instr->num_srcs; i++) {
+      print_src(&instr->src[i].src, state);
+
+      fprintf(fp, " ");
+
+      switch(instr->src[i].src_type) {
+      case nir_tex_src_coord:
+         fprintf(fp, "(coord)");
+         break;
+      case nir_tex_src_projector:
+         fprintf(fp, "(projector)");
+         break;
+      case nir_tex_src_comparitor:
+         fprintf(fp, "(comparitor)");
+         break;
+      case nir_tex_src_offset:
+         fprintf(fp, "(offset)");
+         break;
+      case nir_tex_src_bias:
+         fprintf(fp, "(bias)");
+         break;
+      case nir_tex_src_lod:
+         fprintf(fp, "(lod)");
+         break;
+      case nir_tex_src_ms_index:
+         fprintf(fp, "(ms_index)");
+         break;
+      case nir_tex_src_ddx:
+         fprintf(fp, "(ddx)");
+         break;
+      case nir_tex_src_ddy:
+         fprintf(fp, "(ddy)");
+         break;
+      case nir_tex_src_texture_offset:
+         fprintf(fp, "(texture_offset)");
+         break;
+      case nir_tex_src_sampler_offset:
+         fprintf(fp, "(sampler_offset)");
+         break;
+
+      default:
+         unreachable("Invalid texture source type");
+         break;
+      }
+
+      fprintf(fp, ", ");
+   }
+
+   bool has_nonzero_offset = false;
+   for (unsigned i = 0; i < 4; i++) {
+      if (instr->const_offset[i] != 0) {
+         has_nonzero_offset = true;
+         break;
+      }
+   }
+
+   if (has_nonzero_offset) {
+      fprintf(fp, "[%i %i %i %i] (offset), ",
+              instr->const_offset[0], instr->const_offset[1],
+              instr->const_offset[2], instr->const_offset[3]);
+   }
+
+   if (instr->op == nir_texop_tg4) {
+      fprintf(fp, "%u (gather_component), ", instr->component);
+   }
+
+   if (instr->texture) {
+      assert(instr->sampler);
+      fprintf(fp, " (texture)");
+   }
+   if (instr->sampler) {
+      print_deref(instr->sampler, state);
+      fprintf(fp, " (sampler)");
+   } else {
+      assert(instr->texture == NULL);
+      fprintf(fp, "%u (texture) %u (sampler)",
+              instr->texture_index, instr->sampler_index);
+   }
+}
+
+static void
+print_call_instr(nir_call_instr *instr, print_state *state)
+{
+   FILE *fp = state->fp;
+
+   fprintf(fp, "call %s ", instr->callee->name);
+
+   for (unsigned i = 0; i < instr->num_params; i++) {
+      if (i != 0)
+         fprintf(fp, ", ");
+
+      print_deref(instr->params[i], state);
+   }
+
+   if (instr->return_deref != NULL) {
+      if (instr->num_params != 0)
+         fprintf(fp, ", ");
+      fprintf(fp, "returning ");
+      print_deref(instr->return_deref, state);
+   }
+}
+
+static void
+print_load_const_instr(nir_load_const_instr *instr, print_state *state)
+{
+   FILE *fp = state->fp;
+
+   print_ssa_def(&instr->def, state);
+
+   fprintf(fp, " = load_const (");
+
+   for (unsigned i = 0; i < instr->def.num_components; i++) {
+      if (i != 0)
+         fprintf(fp, ", ");
+
+      /*
+       * we don't really know the type of the constant (if it will be used as a
+       * float or an int), so just print the raw constant in hex for fidelity
+       * and then print the float in a comment for readability.
+       */
+
+      fprintf(fp, "0x%08x /* %f */", instr->value.u[i], instr->value.f[i]);
+   }
+
+   fprintf(fp, ")");
+}
+
+static void
+print_jump_instr(nir_jump_instr *instr, print_state *state)
+{
+   FILE *fp = state->fp;
+
+   switch (instr->type) {
+   case nir_jump_break:
+      fprintf(fp, "break");
+      break;
+
+   case nir_jump_continue:
+      fprintf(fp, "continue");
+      break;
+
+   case nir_jump_return:
+      fprintf(fp, "return");
+      break;
+   }
+}
+
+static void
+print_ssa_undef_instr(nir_ssa_undef_instr* instr, print_state *state)
+{
+   FILE *fp = state->fp;
+   print_ssa_def(&instr->def, state);
+   fprintf(fp, " = undefined");
+}
+
+static void
+print_phi_instr(nir_phi_instr *instr, print_state *state)
+{
+   FILE *fp = state->fp;
+   print_dest(&instr->dest, state);
+   fprintf(fp, " = phi ");
+   nir_foreach_phi_src(instr, src) {
+      if (&src->node != exec_list_get_head(&instr->srcs))
+         fprintf(fp, ", ");
+
+      fprintf(fp, "block_%u: ", src->pred->index);
+      print_src(&src->src, state);
+   }
+}
+
+static void
+print_parallel_copy_instr(nir_parallel_copy_instr *instr, print_state *state)
+{
+   FILE *fp = state->fp;
+   nir_foreach_parallel_copy_entry(instr, entry) {
+      if (&entry->node != exec_list_get_head(&instr->entries))
+         fprintf(fp, "; ");
+
+      print_dest(&entry->dest, state);
+      fprintf(fp, " = ");
+      print_src(&entry->src, state);
+   }
+}
+
+static void
+print_instr(const nir_instr *instr, print_state *state, unsigned tabs)
+{
+   FILE *fp = state->fp;
+   print_tabs(tabs, fp);
+
+   switch (instr->type) {
+   case nir_instr_type_alu:
+      print_alu_instr(nir_instr_as_alu(instr), state);
+      break;
+
+   case nir_instr_type_call:
+      print_call_instr(nir_instr_as_call(instr), state);
+      break;
+
+   case nir_instr_type_intrinsic:
+      print_intrinsic_instr(nir_instr_as_intrinsic(instr), state);
+      break;
+
+   case nir_instr_type_tex:
+      print_tex_instr(nir_instr_as_tex(instr), state);
+      break;
+
+   case nir_instr_type_load_const:
+      print_load_const_instr(nir_instr_as_load_const(instr), state);
+      break;
+
+   case nir_instr_type_jump:
+      print_jump_instr(nir_instr_as_jump(instr), state);
+      break;
+
+   case nir_instr_type_ssa_undef:
+      print_ssa_undef_instr(nir_instr_as_ssa_undef(instr), state);
+      break;
+
+   case nir_instr_type_phi:
+      print_phi_instr(nir_instr_as_phi(instr), state);
+      break;
+
+   case nir_instr_type_parallel_copy:
+      print_parallel_copy_instr(nir_instr_as_parallel_copy(instr), state);
+      break;
+
+   default:
+      unreachable("Invalid instruction type");
+      break;
+   }
+}
+
+static int
+compare_block_index(const void *p1, const void *p2)
+{
+   const nir_block *block1 = *((const nir_block **) p1);
+   const nir_block *block2 = *((const nir_block **) p2);
+
+   return (int) block1->index - (int) block2->index;
+}
+
+static void print_cf_node(nir_cf_node *node, print_state *state,
+                          unsigned tabs);
+
+static void
+print_block(nir_block *block, print_state *state, unsigned tabs)
+{
+   FILE *fp = state->fp;
+
+   print_tabs(tabs, fp);
+   fprintf(fp, "block block_%u:\n", block->index);
+
+   /* sort the predecessors by index so we consistently print the same thing */
+
+   nir_block **preds =
+      malloc(block->predecessors->entries * sizeof(nir_block *));
+
+   struct set_entry *entry;
+   unsigned i = 0;
+   set_foreach(block->predecessors, entry) {
+      preds[i++] = (nir_block *) entry->key;
+   }
+
+   qsort(preds, block->predecessors->entries, sizeof(nir_block *),
+         compare_block_index);
+
+   print_tabs(tabs, fp);
+   fprintf(fp, "/* preds: ");
+   for (unsigned i = 0; i < block->predecessors->entries; i++) {
+      fprintf(fp, "block_%u ", preds[i]->index);
+   }
+   fprintf(fp, "*/\n");
+
+   free(preds);
+
+   nir_foreach_instr(block, instr) {
+      print_instr(instr, state, tabs);
+      fprintf(fp, "\n");
+   }
+
+   print_tabs(tabs, fp);
+   fprintf(fp, "/* succs: ");
+   for (unsigned i = 0; i < 2; i++)
+      if (block->successors[i]) {
+         fprintf(fp, "block_%u ", block->successors[i]->index);
+      }
+   fprintf(fp, "*/\n");
+}
+
+static void
+print_if(nir_if *if_stmt, print_state *state, unsigned tabs)
+{
+   FILE *fp = state->fp;
+
+   print_tabs(tabs, fp);
+   fprintf(fp, "if ");
+   print_src(&if_stmt->condition, state);
+   fprintf(fp, " {\n");
+   foreach_list_typed(nir_cf_node, node, node, &if_stmt->then_list) {
+      print_cf_node(node, state, tabs + 1);
+   }
+   print_tabs(tabs, fp);
+   fprintf(fp, "} else {\n");
+   foreach_list_typed(nir_cf_node, node, node, &if_stmt->else_list) {
+      print_cf_node(node, state, tabs + 1);
+   }
+   print_tabs(tabs, fp);
+   fprintf(fp, "}\n");
+}
+
+static void
+print_loop(nir_loop *loop, print_state *state, unsigned tabs)
+{
+   FILE *fp = state->fp;
+
+   print_tabs(tabs, fp);
+   fprintf(fp, "loop {\n");
+   foreach_list_typed(nir_cf_node, node, node, &loop->body) {
+      print_cf_node(node, state, tabs + 1);
+   }
+   print_tabs(tabs, fp);
+   fprintf(fp, "}\n");
+}
+
+static void
+print_cf_node(nir_cf_node *node, print_state *state, unsigned int tabs)
+{
+   switch (node->type) {
+   case nir_cf_node_block:
+      print_block(nir_cf_node_as_block(node), state, tabs);
+      break;
+
+   case nir_cf_node_if:
+      print_if(nir_cf_node_as_if(node), state, tabs);
+      break;
+
+   case nir_cf_node_loop:
+      print_loop(nir_cf_node_as_loop(node), state, tabs);
+      break;
+
+   default:
+      unreachable("Invalid CFG node type");
+   }
+}
+
+static void
+print_function_impl(nir_function_impl *impl, print_state *state)
+{
+   FILE *fp = state->fp;
+
+   fprintf(fp, "\nimpl %s ", impl->function->name);
+
+   for (unsigned i = 0; i < impl->num_params; i++) {
+      if (i != 0)
+         fprintf(fp, ", ");
+
+      print_var(impl->params[i], state);
+   }
+
+   if (impl->return_var != NULL) {
+      if (impl->num_params != 0)
+         fprintf(fp, ", ");
+      fprintf(fp, "returning ");
+      print_var(impl->return_var, state);
+   }
+
+   fprintf(fp, "{\n");
+
+   nir_foreach_variable(var, &impl->locals) {
+      fprintf(fp, "\t");
+      print_var_decl(var, state);
+   }
+
+   foreach_list_typed(nir_register, reg, node, &impl->registers) {
+      fprintf(fp, "\t");
+      print_register_decl(reg, state);
+   }
+
+   nir_index_blocks(impl);
+
+   foreach_list_typed(nir_cf_node, node, node, &impl->body) {
+      print_cf_node(node, state, 1);
+   }
+
+   fprintf(fp, "\tblock block_%u:\n}\n\n", impl->end_block->index);
+}
+
+static void
+print_function(nir_function *function, print_state *state)
+{
+   FILE *fp = state->fp;
+
+   fprintf(fp, "decl_function %s ", function->name);
+
+   for (unsigned i = 0; i < function->num_params; i++) {
+      if (i != 0)
+         fprintf(fp, ", ");
+
+      switch (function->params[i].param_type) {
+      case nir_parameter_in:
+         fprintf(fp, "in ");
+         break;
+      case nir_parameter_out:
+         fprintf(fp, "out ");
+         break;
+      case nir_parameter_inout:
+         fprintf(fp, "inout ");
+         break;
+      default:
+         unreachable("Invalid parameter type");
+      }
+
+      glsl_print_type(function->params[i].type, fp);
+   }
+
+   if (function->return_type != NULL) {
+      if (function->num_params != 0)
+         fprintf(fp, ", ");
+      fprintf(fp, "returning ");
+      glsl_print_type(function->return_type, fp);
+   }
+
+   fprintf(fp, "\n");
+
+   if (function->impl != NULL) {
+      print_function_impl(function->impl, state);
+      return;
+   }
+}
+
+static void
+init_print_state(print_state *state, nir_shader *shader, FILE *fp)
+{
+   state->fp = fp;
+   state->shader = shader;
+   state->ht = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
+                                       _mesa_key_pointer_equal);
+   state->syms = _mesa_set_create(NULL, _mesa_key_hash_string,
+                                  _mesa_key_string_equal);
+   state->index = 0;
+}
+
+static void
+destroy_print_state(print_state *state)
+{
+   _mesa_hash_table_destroy(state->ht, NULL);
+   _mesa_set_destroy(state->syms, NULL);
+}
+
+void
+nir_print_shader(nir_shader *shader, FILE *fp)
+{
+   print_state state;
+   init_print_state(&state, shader, fp);
+
+   fprintf(fp, "shader: %s\n", gl_shader_stage_name(shader->stage));
+
+   if (shader->info.name)
+      fprintf(fp, "name: %s\n", shader->info.name);
+
+   if (shader->info.label)
+      fprintf(fp, "label: %s\n", shader->info.label);
+
+   fprintf(fp, "inputs: %u\n", shader->num_inputs);
+   fprintf(fp, "outputs: %u\n", shader->num_outputs);
+   fprintf(fp, "uniforms: %u\n", shader->num_uniforms);
+   fprintf(fp, "shared: %u\n", shader->num_shared);
+
+   nir_foreach_variable(var, &shader->uniforms) {
+      print_var_decl(var, &state);
+   }
+
+   nir_foreach_variable(var, &shader->inputs) {
+      print_var_decl(var, &state);
+   }
+
+   nir_foreach_variable(var, &shader->outputs) {
+      print_var_decl(var, &state);
+   }
+
+   nir_foreach_variable(var, &shader->shared) {
+      print_var_decl(var, &state);
+   }
+
+   nir_foreach_variable(var, &shader->globals) {
+      print_var_decl(var, &state);
+   }
+
+   nir_foreach_variable(var, &shader->system_values) {
+      print_var_decl(var, &state);
+   }
+
+   foreach_list_typed(nir_register, reg, node, &shader->registers) {
+      print_register_decl(reg, &state);
+   }
+
+   foreach_list_typed(nir_function, func, node, &shader->functions) {
+      print_function(func, &state);
+   }
+
+   destroy_print_state(&state);
+}
+
+void
+nir_print_instr(const nir_instr *instr, FILE *fp)
+{
+   print_state state = {
+      .fp = fp,
+   };
+   print_instr(instr, &state, 0);
+
+}
diff --git a/src/compiler/nir/nir_remove_dead_variables.c b/src/compiler/nir/nir_remove_dead_variables.c
new file mode 100644
index 00000000000..792c5d4aae6
--- /dev/null
+++ b/src/compiler/nir/nir_remove_dead_variables.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+
+static void
+add_var_use_intrinsic(nir_intrinsic_instr *instr, struct set *live)
+{
+   unsigned num_vars = nir_intrinsic_infos[instr->intrinsic].num_variables;
+   for (unsigned i = 0; i < num_vars; i++) {
+      nir_variable *var = instr->variables[i]->var;
+      _mesa_set_add(live, var);
+   }
+}
+
+static void
+add_var_use_call(nir_call_instr *instr, struct set *live)
+{
+   if (instr->return_deref != NULL) {
+      nir_variable *var = instr->return_deref->var;
+      _mesa_set_add(live, var);
+   }
+
+   for (unsigned i = 0; i < instr->num_params; i++) {
+      nir_variable *var = instr->params[i]->var;
+      _mesa_set_add(live, var);
+   }
+}
+
+static void
+add_var_use_tex(nir_tex_instr *instr, struct set *live)
+{
+   if (instr->sampler != NULL) {
+      nir_variable *var = instr->sampler->var;
+      _mesa_set_add(live, var);
+   }
+}
+
+static bool
+add_var_use_block(nir_block *block, void *state)
+{
+   struct set *live = state;
+
+   nir_foreach_instr(block, instr) {
+      switch(instr->type) {
+      case nir_instr_type_intrinsic:
+         add_var_use_intrinsic(nir_instr_as_intrinsic(instr), live);
+         break;
+
+      case nir_instr_type_call:
+         add_var_use_call(nir_instr_as_call(instr), live);
+         break;
+
+      case nir_instr_type_tex:
+         add_var_use_tex(nir_instr_as_tex(instr), live);
+         break;
+
+      default:
+         break;
+      }
+   }
+
+   return true;
+}
+
+static void
+add_var_use_shader(nir_shader *shader, struct set *live)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl) {
+         nir_foreach_block(function->impl, add_var_use_block, live);
+      }
+   }
+}
+
+static bool
+remove_dead_vars(struct exec_list *var_list, struct set *live)
+{
+   bool progress = false;
+
+   foreach_list_typed_safe(nir_variable, var, node, var_list) {
+      struct set_entry *entry = _mesa_set_search(live, var);
+      if (entry == NULL) {
+         exec_node_remove(&var->node);
+         ralloc_free(var);
+         progress = true;
+      }
+   }
+
+   return progress;
+}
+
+bool
+nir_remove_dead_variables(nir_shader *shader, nir_variable_mode mode)
+{
+   bool progress = false;
+   struct set *live =
+      _mesa_set_create(NULL, _mesa_hash_pointer, _mesa_key_pointer_equal);
+
+   add_var_use_shader(shader, live);
+
+   if (mode == nir_var_uniform || mode == nir_var_all)
+      progress = remove_dead_vars(&shader->uniforms, live) || progress;
+
+   if (mode == nir_var_shader_in || mode == nir_var_all)
+      progress = remove_dead_vars(&shader->inputs, live) || progress;
+
+   if (mode == nir_var_shader_out || mode == nir_var_all)
+      progress = remove_dead_vars(&shader->outputs, live) || progress;
+
+   if (mode == nir_var_global || mode == nir_var_all)
+      progress = remove_dead_vars(&shader->globals, live) || progress;
+
+   if (mode == nir_var_system_value || mode == nir_var_all)
+      progress = remove_dead_vars(&shader->system_values, live) || progress;
+
+   if (mode == nir_var_local || mode == nir_var_all) {
+      nir_foreach_function(shader, function) {
+         if (function->impl) {
+            if (remove_dead_vars(&function->impl->locals, live)) {
+               nir_metadata_preserve(function->impl, nir_metadata_block_index |
+                                                     nir_metadata_dominance |
+                                                     nir_metadata_live_ssa_defs);
+               progress = true;
+            }
+         }
+      }
+   }
+
+   _mesa_set_destroy(live, NULL);
+   return progress;
+}
diff --git a/src/compiler/nir/nir_repair_ssa.c b/src/compiler/nir/nir_repair_ssa.c
new file mode 100644
index 00000000000..3ab4f0f6db7
--- /dev/null
+++ b/src/compiler/nir/nir_repair_ssa.c
@@ -0,0 +1,157 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "nir.h"
+#include "nir_phi_builder.h"
+
+struct repair_ssa_state {
+   nir_function_impl *impl;
+
+   BITSET_WORD *def_set;
+   struct nir_phi_builder *phi_builder;
+
+   bool progress;
+};
+
+/* Get ready to build a phi and return the builder */
+static struct nir_phi_builder *
+prep_build_phi(struct repair_ssa_state *state)
+{
+   const unsigned num_words = BITSET_WORDS(state->impl->num_blocks);
+
+   /* We create the phi builder on-demand. */
+   if (state->phi_builder == NULL) {
+      state->phi_builder = nir_phi_builder_create(state->impl);
+      state->def_set = ralloc_array(NULL, BITSET_WORD, num_words);
+   }
+
+   /* We're going to build a phi.  That's progress. */
+   state->progress = true;
+
+   /* Set the defs set to empty */
+   memset(state->def_set, 0, num_words * sizeof(*state->def_set));
+
+   return state->phi_builder;
+}
+
+static nir_block *
+get_src_block(nir_src *src)
+{
+   if (src->parent_instr->type == nir_instr_type_phi) {
+      return exec_node_data(nir_phi_src, src, src)->pred;
+   } else {
+      return src->parent_instr->block;
+   }
+}
+
+static bool
+repair_ssa_def(nir_ssa_def *def, void *void_state)
+{
+   struct repair_ssa_state *state = void_state;
+
+   bool is_valid = true;
+   nir_foreach_use(def, src) {
+      if (!nir_block_dominates(def->parent_instr->block, get_src_block(src))) {
+         is_valid = false;
+         break;
+      }
+   }
+
+   if (is_valid)
+      return true;
+
+   struct nir_phi_builder *pb = prep_build_phi(state);
+
+   BITSET_SET(state->def_set, def->parent_instr->block->index);
+
+   struct nir_phi_builder_value *val =
+      nir_phi_builder_add_value(pb, def->num_components, state->def_set);
+
+   nir_phi_builder_value_set_block_def(val, def->parent_instr->block, def);
+
+   nir_foreach_use_safe(def, src) {
+      nir_block *src_block = get_src_block(src);
+      if (!nir_block_dominates(def->parent_instr->block, src_block)) {
+         nir_instr_rewrite_src(src->parent_instr, src, nir_src_for_ssa(
+            nir_phi_builder_value_get_block_def(val, src_block)));
+      }
+   }
+
+   return true;
+}
+
+static bool
+repair_ssa_block(nir_block *block, void *state)
+{
+   nir_foreach_instr_safe(block, instr) {
+      nir_foreach_ssa_def(instr, repair_ssa_def, state);
+   }
+
+   return true;
+}
+
+bool
+nir_repair_ssa_impl(nir_function_impl *impl)
+{
+   struct repair_ssa_state state;
+
+   state.impl = impl;
+   state.phi_builder = NULL;
+   state.progress = false;
+
+   nir_metadata_require(impl, nir_metadata_block_index |
+                              nir_metadata_dominance);
+
+   nir_foreach_block(impl, repair_ssa_block, &state);
+
+   if (state.progress)
+      nir_metadata_preserve(impl, nir_metadata_block_index |
+                                  nir_metadata_dominance);
+
+   if (state.phi_builder) {
+      nir_phi_builder_finish(state.phi_builder);
+      ralloc_free(state.def_set);
+   }
+
+   return state.progress;
+}
+
+/** This pass can be used to repair SSA form in a shader.
+ *
+ * Sometimes a transformation (such as return lowering) will have to make
+ * changes to a shader which, while still correct, break some of NIR's SSA
+ * invariants.  This pass will insert ssa_undefs and phi nodes as needed to
+ * get the shader back into SSA that the validator will like.
+ */
+bool
+nir_repair_ssa(nir_shader *shader)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         progress = nir_repair_ssa_impl(function->impl) || progress;
+   }
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_search.c b/src/compiler/nir/nir_search.c
new file mode 100644
index 00000000000..56d7e8162f3
--- /dev/null
+++ b/src/compiler/nir/nir_search.c
@@ -0,0 +1,379 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir_search.h"
+
+struct match_state {
+   unsigned variables_seen;
+   nir_alu_src variables[NIR_SEARCH_MAX_VARIABLES];
+};
+
+static bool
+match_expression(const nir_search_expression *expr, nir_alu_instr *instr,
+                 unsigned num_components, const uint8_t *swizzle,
+                 struct match_state *state);
+
+static const uint8_t identity_swizzle[] = { 0, 1, 2, 3 };
+
+static bool alu_instr_is_bool(nir_alu_instr *instr);
+
+static bool
+src_is_bool(nir_src src)
+{
+   if (!src.is_ssa)
+      return false;
+   if (src.ssa->parent_instr->type != nir_instr_type_alu)
+      return false;
+   return alu_instr_is_bool(nir_instr_as_alu(src.ssa->parent_instr));
+}
+
+static bool
+alu_instr_is_bool(nir_alu_instr *instr)
+{
+   switch (instr->op) {
+   case nir_op_iand:
+   case nir_op_ior:
+   case nir_op_ixor:
+      return src_is_bool(instr->src[0].src) && src_is_bool(instr->src[1].src);
+   case nir_op_inot:
+      return src_is_bool(instr->src[0].src);
+   default:
+      return nir_op_infos[instr->op].output_type == nir_type_bool;
+   }
+}
+
+static bool
+match_value(const nir_search_value *value, nir_alu_instr *instr, unsigned src,
+            unsigned num_components, const uint8_t *swizzle,
+            struct match_state *state)
+{
+   uint8_t new_swizzle[4];
+
+   /* If the source is an explicitly sized source, then we need to reset
+    * both the number of components and the swizzle.
+    */
+   if (nir_op_infos[instr->op].input_sizes[src] != 0) {
+      num_components = nir_op_infos[instr->op].input_sizes[src];
+      swizzle = identity_swizzle;
+   }
+
+   for (unsigned i = 0; i < num_components; ++i)
+      new_swizzle[i] = instr->src[src].swizzle[swizzle[i]];
+
+   switch (value->type) {
+   case nir_search_value_expression:
+      if (!instr->src[src].src.is_ssa)
+         return false;
+
+      if (instr->src[src].src.ssa->parent_instr->type != nir_instr_type_alu)
+         return false;
+
+      return match_expression(nir_search_value_as_expression(value),
+                              nir_instr_as_alu(instr->src[src].src.ssa->parent_instr),
+                              num_components, new_swizzle, state);
+
+   case nir_search_value_variable: {
+      nir_search_variable *var = nir_search_value_as_variable(value);
+      assert(var->variable < NIR_SEARCH_MAX_VARIABLES);
+
+      if (state->variables_seen & (1 << var->variable)) {
+         if (!nir_srcs_equal(state->variables[var->variable].src,
+                             instr->src[src].src))
+            return false;
+
+         assert(!instr->src[src].abs && !instr->src[src].negate);
+
+         for (unsigned i = 0; i < num_components; ++i) {
+            if (state->variables[var->variable].swizzle[i] != new_swizzle[i])
+               return false;
+         }
+
+         return true;
+      } else {
+         if (var->is_constant &&
+             instr->src[src].src.ssa->parent_instr->type != nir_instr_type_load_const)
+            return false;
+
+         if (var->type != nir_type_invalid) {
+            if (instr->src[src].src.ssa->parent_instr->type != nir_instr_type_alu)
+               return false;
+
+            nir_alu_instr *src_alu =
+               nir_instr_as_alu(instr->src[src].src.ssa->parent_instr);
+
+            if (nir_op_infos[src_alu->op].output_type != var->type &&
+                !(var->type == nir_type_bool && alu_instr_is_bool(src_alu)))
+               return false;
+         }
+
+         state->variables_seen |= (1 << var->variable);
+         state->variables[var->variable].src = instr->src[src].src;
+         state->variables[var->variable].abs = false;
+         state->variables[var->variable].negate = false;
+
+         for (unsigned i = 0; i < 4; ++i) {
+            if (i < num_components)
+               state->variables[var->variable].swizzle[i] = new_swizzle[i];
+            else
+               state->variables[var->variable].swizzle[i] = 0;
+         }
+
+         return true;
+      }
+   }
+
+   case nir_search_value_constant: {
+      nir_search_constant *const_val = nir_search_value_as_constant(value);
+
+      if (!instr->src[src].src.is_ssa)
+         return false;
+
+      if (instr->src[src].src.ssa->parent_instr->type != nir_instr_type_load_const)
+         return false;
+
+      nir_load_const_instr *load =
+         nir_instr_as_load_const(instr->src[src].src.ssa->parent_instr);
+
+      switch (nir_op_infos[instr->op].input_types[src]) {
+      case nir_type_float:
+         for (unsigned i = 0; i < num_components; ++i) {
+            if (load->value.f[new_swizzle[i]] != const_val->data.f)
+               return false;
+         }
+         return true;
+      case nir_type_int:
+      case nir_type_uint:
+      case nir_type_bool:
+         for (unsigned i = 0; i < num_components; ++i) {
+            if (load->value.i[new_swizzle[i]] != const_val->data.i)
+               return false;
+         }
+         return true;
+      default:
+         unreachable("Invalid alu source type");
+      }
+   }
+
+   default:
+      unreachable("Invalid search value type");
+   }
+}
+
+static bool
+match_expression(const nir_search_expression *expr, nir_alu_instr *instr,
+                 unsigned num_components, const uint8_t *swizzle,
+                 struct match_state *state)
+{
+   if (instr->op != expr->opcode)
+      return false;
+
+   assert(!instr->dest.saturate);
+   assert(nir_op_infos[instr->op].num_inputs > 0);
+
+   /* If we have an explicitly sized destination, we can only handle the
+    * identity swizzle.  While dot(vec3(a, b, c).zxy) is a valid
+    * expression, we don't have the information right now to propagate that
+    * swizzle through.  We can only properly propagate swizzles if the
+    * instruction is vectorized.
+    */
+   if (nir_op_infos[instr->op].output_size != 0) {
+      for (unsigned i = 0; i < num_components; i++) {
+         if (swizzle[i] != i)
+            return false;
+      }
+   }
+
+   /* Stash off the current variables_seen bitmask.  This way we can
+    * restore it prior to matching in the commutative case below.
+    */
+   unsigned variables_seen_stash = state->variables_seen;
+
+   bool matched = true;
+   for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) {
+      if (!match_value(expr->srcs[i], instr, i, num_components,
+                       swizzle, state)) {
+         matched = false;
+         break;
+      }
+   }
+
+   if (matched)
+      return true;
+
+   if (nir_op_infos[instr->op].algebraic_properties & NIR_OP_IS_COMMUTATIVE) {
+      assert(nir_op_infos[instr->op].num_inputs == 2);
+
+      /* Restore the variables_seen bitmask.  If we don't do this, then we
+       * could end up with an erroneous failure due to variables found in the
+       * first match attempt above not matching those in the second.
+       */
+      state->variables_seen = variables_seen_stash;
+
+      if (!match_value(expr->srcs[0], instr, 1, num_components,
+                       swizzle, state))
+         return false;
+
+      return match_value(expr->srcs[1], instr, 0, num_components,
+                         swizzle, state);
+   } else {
+      return false;
+   }
+}
+
+static nir_alu_src
+construct_value(const nir_search_value *value, nir_alu_type type,
+                unsigned num_components, struct match_state *state,
+                nir_instr *instr, void *mem_ctx)
+{
+   switch (value->type) {
+   case nir_search_value_expression: {
+      const nir_search_expression *expr = nir_search_value_as_expression(value);
+
+      if (nir_op_infos[expr->opcode].output_size != 0)
+         num_components = nir_op_infos[expr->opcode].output_size;
+
+      nir_alu_instr *alu = nir_alu_instr_create(mem_ctx, expr->opcode);
+      nir_ssa_dest_init(&alu->instr, &alu->dest.dest, num_components, NULL);
+      alu->dest.write_mask = (1 << num_components) - 1;
+      alu->dest.saturate = false;
+
+      for (unsigned i = 0; i < nir_op_infos[expr->opcode].num_inputs; i++) {
+         /* If the source is an explicitly sized source, then we need to reset
+          * the number of components to match.
+          */
+         if (nir_op_infos[alu->op].input_sizes[i] != 0)
+            num_components = nir_op_infos[alu->op].input_sizes[i];
+
+         alu->src[i] = construct_value(expr->srcs[i],
+                                       nir_op_infos[alu->op].input_types[i],
+                                       num_components,
+                                       state, instr, mem_ctx);
+      }
+
+      nir_instr_insert_before(instr, &alu->instr);
+
+      nir_alu_src val;
+      val.src = nir_src_for_ssa(&alu->dest.dest.ssa);
+      val.negate = false;
+      val.abs = false,
+      memcpy(val.swizzle, identity_swizzle, sizeof val.swizzle);
+
+      return val;
+   }
+
+   case nir_search_value_variable: {
+      const nir_search_variable *var = nir_search_value_as_variable(value);
+      assert(state->variables_seen & (1 << var->variable));
+
+      nir_alu_src val = { NIR_SRC_INIT };
+      nir_alu_src_copy(&val, &state->variables[var->variable], mem_ctx);
+
+      assert(!var->is_constant);
+
+      return val;
+   }
+
+   case nir_search_value_constant: {
+      const nir_search_constant *c = nir_search_value_as_constant(value);
+      nir_load_const_instr *load = nir_load_const_instr_create(mem_ctx, 1);
+
+      switch (type) {
+      case nir_type_float:
+         load->def.name = ralloc_asprintf(mem_ctx, "%f", c->data.f);
+         load->value.f[0] = c->data.f;
+         break;
+      case nir_type_int:
+         load->def.name = ralloc_asprintf(mem_ctx, "%d", c->data.i);
+         load->value.i[0] = c->data.i;
+         break;
+      case nir_type_uint:
+      case nir_type_bool:
+         load->value.u[0] = c->data.u;
+         break;
+      default:
+         unreachable("Invalid alu source type");
+      }
+
+      nir_instr_insert_before(instr, &load->instr);
+
+      nir_alu_src val;
+      val.src = nir_src_for_ssa(&load->def);
+      val.negate = false;
+      val.abs = false,
+      memset(val.swizzle, 0, sizeof val.swizzle);
+
+      return val;
+   }
+
+   default:
+      unreachable("Invalid search value type");
+   }
+}
+
+nir_alu_instr *
+nir_replace_instr(nir_alu_instr *instr, const nir_search_expression *search,
+                  const nir_search_value *replace, void *mem_ctx)
+{
+   uint8_t swizzle[4] = { 0, 0, 0, 0 };
+
+   for (unsigned i = 0; i < instr->dest.dest.ssa.num_components; ++i)
+      swizzle[i] = i;
+
+   assert(instr->dest.dest.is_ssa);
+
+   struct match_state state;
+   state.variables_seen = 0;
+
+   if (!match_expression(search, instr, instr->dest.dest.ssa.num_components,
+                         swizzle, &state))
+      return NULL;
+
+   /* Inserting a mov may be unnecessary.  However, it's much easier to
+    * simply let copy propagation clean this up than to try to go through
+    * and rewrite swizzles ourselves.
+    */
+   nir_alu_instr *mov = nir_alu_instr_create(mem_ctx, nir_op_imov);
+   mov->dest.write_mask = instr->dest.write_mask;
+   nir_ssa_dest_init(&mov->instr, &mov->dest.dest,
+                     instr->dest.dest.ssa.num_components, NULL);
+
+   mov->src[0] = construct_value(replace, nir_op_infos[instr->op].output_type,
+                                 instr->dest.dest.ssa.num_components, &state,
+                                 &instr->instr, mem_ctx);
+   nir_instr_insert_before(&instr->instr, &mov->instr);
+
+   nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa,
+                            nir_src_for_ssa(&mov->dest.dest.ssa));
+
+   /* We know this one has no more uses because we just rewrote them all,
+    * so we can remove it.  The rest of the matched expression, however, we
+    * don't know so much about.  We'll just let dead code clean them up.
+    */
+   nir_instr_remove(&instr->instr);
+
+   return mov;
+}
diff --git a/src/compiler/nir/nir_search.h b/src/compiler/nir/nir_search.h
new file mode 100644
index 00000000000..7d47792945e
--- /dev/null
+++ b/src/compiler/nir/nir_search.h
@@ -0,0 +1,99 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#ifndef _NIR_SEARCH_
+#define _NIR_SEARCH_
+
+#include "nir.h"
+
+#define NIR_SEARCH_MAX_VARIABLES 16
+
+typedef enum {
+   nir_search_value_expression,
+   nir_search_value_variable,
+   nir_search_value_constant,
+} nir_search_value_type;
+
+typedef struct {
+   nir_search_value_type type;
+} nir_search_value;
+
+typedef struct {
+   nir_search_value value;
+
+   /** The variable index;  Must be less than NIR_SEARCH_MAX_VARIABLES */
+   unsigned variable;
+
+   /** Indicates that the given variable must be a constant
+    *
+    * This is only alloed in search expressions and indicates that the
+    * given variable is only allowed to match constant values.
+    */
+   bool is_constant;
+
+   /** Indicates that the given variable must have a certain type
+    *
+    * This is only allowed in search expressions and indicates that the
+    * given variable is only allowed to match values that come from an ALU
+    * instruction with the given output type.  A type of nir_type_void
+    * means it can match any type.
+    *
+    * Note: A variable that is both constant and has a non-void type will
+    * never match anything.
+    */
+   nir_alu_type type;
+} nir_search_variable;
+
+typedef struct {
+   nir_search_value value;
+
+   union {
+      uint32_t u;
+      int32_t i;
+      float f;
+   } data;
+} nir_search_constant;
+
+typedef struct {
+   nir_search_value value;
+
+   nir_op opcode;
+   const nir_search_value *srcs[4];
+} nir_search_expression;
+
+NIR_DEFINE_CAST(nir_search_value_as_variable, nir_search_value,
+                nir_search_variable, value)
+NIR_DEFINE_CAST(nir_search_value_as_constant, nir_search_value,
+                nir_search_constant, value)
+NIR_DEFINE_CAST(nir_search_value_as_expression, nir_search_value,
+                nir_search_expression, value)
+
+nir_alu_instr *
+nir_replace_instr(nir_alu_instr *instr, const nir_search_expression *search,
+                  const nir_search_value *replace, void *mem_ctx);
+
+#endif /* _NIR_SEARCH_ */
diff --git a/src/compiler/nir/nir_split_var_copies.c b/src/compiler/nir/nir_split_var_copies.c
new file mode 100644
index 00000000000..6fdaefa32c8
--- /dev/null
+++ b/src/compiler/nir/nir_split_var_copies.c
@@ -0,0 +1,285 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir.h"
+
+/*
+ * Implements "copy splitting" which is similar to structure splitting only
+ * it works on copy operations rather than the datatypes themselves.  The
+ * GLSL language allows you to copy one variable to another an entire
+ * structure (which may contain arrays or other structures) at a time.
+ * Normally, in a language such as C this would be handled by a "structure
+ * splitting" pass that breaks up the structures.  Unfortunately for us,
+ * structures used in inputs or outputs can't be split.  Therefore,
+ * regardlesss of what we do, we have to be able to copy to/from
+ * structures.
+ *
+ * The primary purpose of structure splitting is to allow you to better
+ * optimize variable access and lower things to registers where you can.
+ * The primary issue here is that, if you lower the copy to a bunch of
+ * loads and stores, you loose a lot of information about the copy
+ * operation that you would like to keep around.  To solve this problem, we
+ * have a "copy splitting" pass that, instead of splitting the structures
+ * or lowering the copy into loads and storres, splits the copy operation
+ * into a bunch of copy operations one for each leaf of the structure tree.
+ * If an intermediate array is encountered, it is referenced with a
+ * wildcard reference to indicate that the entire array is to be copied.
+ *
+ * As things become direct, array copies may be able to be losslessly
+ * lowered to having fewer and fewer wildcards.  However, until that
+ * happens we want to keep the information about the arrays intact.
+ *
+ * Prior to the copy splitting pass, there are no wildcard references but
+ * there may be incomplete references where the tail of the deref chain is
+ * an array or a structure and not a specific element.  After the copy
+ * splitting pass has completed, every variable deref will be a full-length
+ * dereference pointing to a single leaf in the structure type tree with
+ * possibly a few wildcard array dereferences.
+ */
+
+struct split_var_copies_state {
+   void *mem_ctx;
+   void *dead_ctx;
+   bool progress;
+};
+
+/* Recursively constructs deref chains to split a copy instruction into
+ * multiple (if needed) copy instructions with full-length deref chains.
+ * External callers of this function should pass the tail and head of the
+ * deref chains found as the source and destination of the copy instruction
+ * into this function.
+ *
+ * \param  old_copy  The copy instruction we are splitting
+ * \param  dest_head The head of the destination deref chain we are building
+ * \param  src_head  The head of the source deref chain we are building
+ * \param  dest_tail The tail of the destination deref chain we are building
+ * \param  src_tail  The tail of the source deref chain we are building
+ * \param  state     The current split_var_copies_state object
+ */
+static void
+split_var_copy_instr(nir_intrinsic_instr *old_copy,
+                     nir_deref *dest_head, nir_deref *src_head,
+                     nir_deref *dest_tail, nir_deref *src_tail,
+                     struct split_var_copies_state *state)
+{
+   assert(src_tail->type == dest_tail->type);
+
+   /* Make sure these really are the tails of the deref chains */
+   assert(dest_tail->child == NULL);
+   assert(src_tail->child == NULL);
+
+   switch (glsl_get_base_type(src_tail->type)) {
+   case GLSL_TYPE_ARRAY: {
+      /* Make a wildcard dereference */
+      nir_deref_array *deref = nir_deref_array_create(state->dead_ctx);
+      deref->deref.type = glsl_get_array_element(src_tail->type);
+      deref->deref_array_type = nir_deref_array_type_wildcard;
+
+      /* Set the tail of both as the newly created wildcard deref.  It is
+       * safe to use the same wildcard in both places because a) we will be
+       * copying it before we put it in an actual instruction and b)
+       * everything that will potentially add another link in the deref
+       * chain will also add the same thing to both chains.
+       */
+      src_tail->child = &deref->deref;
+      dest_tail->child = &deref->deref;
+
+      split_var_copy_instr(old_copy, dest_head, src_head,
+                           dest_tail->child, src_tail->child, state);
+
+      /* Set it back to the way we found it */
+      src_tail->child = NULL;
+      dest_tail->child = NULL;
+      break;
+   }
+
+   case GLSL_TYPE_STRUCT:
+      /* This is the only part that actually does any interesting
+       * splitting.  For array types, we just use wildcards and resolve
+       * them later.  For structure types, we need to emit one copy
+       * instruction for every structure element.  Because we may have
+       * structs inside structs, we just recurse and let the next level
+       * take care of any additional structures.
+       */
+      for (unsigned i = 0; i < glsl_get_length(src_tail->type); i++) {
+         nir_deref_struct *deref = nir_deref_struct_create(state->dead_ctx, i);
+         deref->deref.type = glsl_get_struct_field(src_tail->type, i);
+
+         /* Set the tail of both as the newly created structure deref.  It
+          * is safe to use the same wildcard in both places because a) we
+          * will be copying it before we put it in an actual instruction
+          * and b) everything that will potentially add another link in the
+          * deref chain will also add the same thing to both chains.
+          */
+         src_tail->child = &deref->deref;
+         dest_tail->child = &deref->deref;
+
+         split_var_copy_instr(old_copy, dest_head, src_head,
+                              dest_tail->child, src_tail->child, state);
+      }
+      /* Set it back to the way we found it */
+      src_tail->child = NULL;
+      dest_tail->child = NULL;
+      break;
+
+   case GLSL_TYPE_UINT:
+   case GLSL_TYPE_INT:
+   case GLSL_TYPE_FLOAT:
+   case GLSL_TYPE_BOOL:
+      if (glsl_type_is_matrix(src_tail->type)) {
+         nir_deref_array *deref = nir_deref_array_create(state->dead_ctx);
+         deref->deref.type = glsl_get_column_type(src_tail->type);
+         deref->deref_array_type = nir_deref_array_type_wildcard;
+
+         /* Set the tail of both as the newly created wildcard deref.  It
+          * is safe to use the same wildcard in both places because a) we
+          * will be copying it before we put it in an actual instruction
+          * and b) everything that will potentially add another link in the
+          * deref chain will also add the same thing to both chains.
+          */
+         src_tail->child = &deref->deref;
+         dest_tail->child = &deref->deref;
+
+         split_var_copy_instr(old_copy, dest_head, src_head,
+                              dest_tail->child, src_tail->child, state);
+
+         /* Set it back to the way we found it */
+         src_tail->child = NULL;
+         dest_tail->child = NULL;
+      } else {
+         /* At this point, we have fully built our deref chains and can
+          * actually add the new copy instruction.
+          */
+         nir_intrinsic_instr *new_copy =
+            nir_intrinsic_instr_create(state->mem_ctx, nir_intrinsic_copy_var);
+
+         /* We need to make copies because a) this deref chain actually
+          * belongs to the copy instruction and b) the deref chains may
+          * have some of the same links due to the way we constructed them
+          */
+         nir_deref *src = nir_copy_deref(new_copy, src_head);
+         nir_deref *dest = nir_copy_deref(new_copy, dest_head);
+
+         new_copy->variables[0] = nir_deref_as_var(dest);
+         new_copy->variables[1] = nir_deref_as_var(src);
+
+         /* Emit the copy instruction after the old instruction.  We'll
+          * remove the old one later.
+          */
+         nir_instr_insert_after(&old_copy->instr, &new_copy->instr);
+         state->progress = true;
+      }
+      break;
+
+   case GLSL_TYPE_SAMPLER:
+   case GLSL_TYPE_IMAGE:
+   case GLSL_TYPE_ATOMIC_UINT:
+   case GLSL_TYPE_INTERFACE:
+   default:
+      unreachable("Cannot copy these types");
+   }
+}
+
+static bool
+split_var_copies_block(nir_block *block, void *void_state)
+{
+   struct split_var_copies_state *state = void_state;
+
+   nir_foreach_instr_safe(block, instr) {
+      if (instr->type != nir_instr_type_intrinsic)
+         continue;
+
+      nir_intrinsic_instr *intrinsic = nir_instr_as_intrinsic(instr);
+      if (intrinsic->intrinsic != nir_intrinsic_copy_var)
+         continue;
+
+      nir_deref *dest_head = &intrinsic->variables[0]->deref;
+      nir_deref *src_head = &intrinsic->variables[1]->deref;
+      nir_deref *dest_tail = nir_deref_tail(dest_head);
+      nir_deref *src_tail = nir_deref_tail(src_head);
+
+      switch (glsl_get_base_type(src_tail->type)) {
+      case GLSL_TYPE_ARRAY:
+      case GLSL_TYPE_STRUCT:
+         split_var_copy_instr(intrinsic, dest_head, src_head,
+                              dest_tail, src_tail, state);
+         nir_instr_remove(&intrinsic->instr);
+         ralloc_steal(state->dead_ctx, instr);
+         break;
+      case GLSL_TYPE_FLOAT:
+      case GLSL_TYPE_INT:
+      case GLSL_TYPE_UINT:
+      case GLSL_TYPE_BOOL:
+         if (glsl_type_is_matrix(src_tail->type)) {
+            split_var_copy_instr(intrinsic, dest_head, src_head,
+                                 dest_tail, src_tail, state);
+            nir_instr_remove(&intrinsic->instr);
+            ralloc_steal(state->dead_ctx, instr);
+         }
+         break;
+      default:
+         unreachable("Invalid type");
+         break;
+      }
+   }
+
+   return true;
+}
+
+static bool
+split_var_copies_impl(nir_function_impl *impl)
+{
+   struct split_var_copies_state state;
+
+   state.mem_ctx = ralloc_parent(impl);
+   state.dead_ctx = ralloc_context(NULL);
+   state.progress = false;
+
+   nir_foreach_block(impl, split_var_copies_block, &state);
+
+   ralloc_free(state.dead_ctx);
+
+   if (state.progress) {
+      nir_metadata_preserve(impl, nir_metadata_block_index |
+                                  nir_metadata_dominance);
+   }
+
+   return state.progress;
+}
+
+bool
+nir_split_var_copies(nir_shader *shader)
+{
+   bool progress = false;
+
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         progress = split_var_copies_impl(function->impl) || progress;
+   }
+
+   return progress;
+}
diff --git a/src/compiler/nir/nir_sweep.c b/src/compiler/nir/nir_sweep.c
new file mode 100644
index 00000000000..5c62154ec7f
--- /dev/null
+++ b/src/compiler/nir/nir_sweep.c
@@ -0,0 +1,174 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "nir.h"
+
+/**
+ * \file nir_sweep.c
+ *
+ * The nir_sweep() pass performs a mark and sweep pass over a nir_shader's associated
+ * memory - anything still connected to the program will be kept, and any dead memory
+ * we dropped on the floor will be freed.
+ *
+ * The expectation is that drivers should call this when finished compiling the shader
+ * (after any optimization, lowering, and so on).  However, it's also fine to call it
+ * earlier, and even many times, trading CPU cycles for memory savings.
+ */
+
+#define steal_list(mem_ctx, type, list) \
+   foreach_list_typed(type, obj, node, list) { ralloc_steal(mem_ctx, obj); }
+
+static void sweep_cf_node(nir_shader *nir, nir_cf_node *cf_node);
+
+static bool
+sweep_src_indirect(nir_src *src, void *nir)
+{
+   if (!src->is_ssa && src->reg.indirect)
+      ralloc_steal(nir, src->reg.indirect);
+
+   return true;
+}
+
+static bool
+sweep_dest_indirect(nir_dest *dest, void *nir)
+{
+   if (!dest->is_ssa && dest->reg.indirect)
+      ralloc_steal(nir, dest->reg.indirect);
+
+   return true;
+}
+
+static void
+sweep_block(nir_shader *nir, nir_block *block)
+{
+   ralloc_steal(nir, block);
+
+   nir_foreach_instr(block, instr) {
+      ralloc_steal(nir, instr);
+
+      nir_foreach_src(instr, sweep_src_indirect, nir);
+      nir_foreach_dest(instr, sweep_dest_indirect, nir);
+   }
+}
+
+static void
+sweep_if(nir_shader *nir, nir_if *iff)
+{
+   ralloc_steal(nir, iff);
+
+   foreach_list_typed(nir_cf_node, cf_node, node, &iff->then_list) {
+      sweep_cf_node(nir, cf_node);
+   }
+
+   foreach_list_typed(nir_cf_node, cf_node, node, &iff->else_list) {
+      sweep_cf_node(nir, cf_node);
+   }
+}
+
+static void
+sweep_loop(nir_shader *nir, nir_loop *loop)
+{
+   ralloc_steal(nir, loop);
+
+   foreach_list_typed(nir_cf_node, cf_node, node, &loop->body) {
+      sweep_cf_node(nir, cf_node);
+   }
+}
+
+static void
+sweep_cf_node(nir_shader *nir, nir_cf_node *cf_node)
+{
+   switch (cf_node->type) {
+   case nir_cf_node_block:
+      sweep_block(nir, nir_cf_node_as_block(cf_node));
+      break;
+   case nir_cf_node_if:
+      sweep_if(nir, nir_cf_node_as_if(cf_node));
+      break;
+   case nir_cf_node_loop:
+      sweep_loop(nir, nir_cf_node_as_loop(cf_node));
+      break;
+   default:
+      unreachable("Invalid CF node type");
+   }
+}
+
+static void
+sweep_impl(nir_shader *nir, nir_function_impl *impl)
+{
+   ralloc_steal(nir, impl);
+
+   ralloc_steal(nir, impl->params);
+   ralloc_steal(nir, impl->return_var);
+   steal_list(nir, nir_variable, &impl->locals);
+   steal_list(nir, nir_register, &impl->registers);
+
+   foreach_list_typed(nir_cf_node, cf_node, node, &impl->body) {
+      sweep_cf_node(nir, cf_node);
+   }
+
+   sweep_block(nir, impl->end_block);
+
+   /* Wipe out all the metadata, if any. */
+   nir_metadata_preserve(impl, nir_metadata_none);
+}
+
+static void
+sweep_function(nir_shader *nir, nir_function *f)
+{
+   ralloc_steal(nir, f);
+   ralloc_steal(nir, f->params);
+
+   if (f->impl)
+      sweep_impl(nir, f->impl);
+}
+
+void
+nir_sweep(nir_shader *nir)
+{
+   void *rubbish = ralloc_context(NULL);
+
+   /* First, move ownership of all the memory to a temporary context; assume dead. */
+   ralloc_adopt(rubbish, nir);
+
+   ralloc_steal(nir, (char *)nir->info.name);
+   if (nir->info.label)
+      ralloc_steal(nir, (char *)nir->info.label);
+
+   /* Variables and registers are not dead.  Steal them back. */
+   steal_list(nir, nir_variable, &nir->uniforms);
+   steal_list(nir, nir_variable, &nir->inputs);
+   steal_list(nir, nir_variable, &nir->outputs);
+   steal_list(nir, nir_variable, &nir->shared);
+   steal_list(nir, nir_variable, &nir->globals);
+   steal_list(nir, nir_variable, &nir->system_values);
+   steal_list(nir, nir_register, &nir->registers);
+
+   /* Recurse into functions, stealing their contents back. */
+   foreach_list_typed(nir_function, func, node, &nir->functions) {
+      sweep_function(nir, func);
+   }
+
+   /* Free everything we didn't steal back. */
+   ralloc_free(rubbish);
+}
diff --git a/src/compiler/nir/nir_to_ssa.c b/src/compiler/nir/nir_to_ssa.c
new file mode 100644
index 00000000000..44a50547738
--- /dev/null
+++ b/src/compiler/nir/nir_to_ssa.c
@@ -0,0 +1,536 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+#include <stdlib.h>
+#include <unistd.h>
+
+/*
+ * Implements the classic to-SSA algorithm described by Cytron et. al. in
+ * "Efficiently Computing Static Single Assignment Form and the Control
+ * Dependence Graph."
+ */
+
+/* inserts a phi node of the form reg = phi(reg, reg, reg, ...) */
+
+static void
+insert_trivial_phi(nir_register *reg, nir_block *block, void *mem_ctx)
+{
+   nir_phi_instr *instr = nir_phi_instr_create(mem_ctx);
+
+   instr->dest.reg.reg = reg;
+   struct set_entry *entry;
+   set_foreach(block->predecessors, entry) {
+      nir_block *pred = (nir_block *) entry->key;
+
+      nir_phi_src *src = ralloc(instr, nir_phi_src);
+      src->pred = pred;
+      src->src.is_ssa = false;
+      src->src.reg.base_offset = 0;
+      src->src.reg.indirect = NULL;
+      src->src.reg.reg = reg;
+      exec_list_push_tail(&instr->srcs, &src->node);
+   }
+
+   nir_instr_insert_before_block(block, &instr->instr);
+}
+
+static void
+insert_phi_nodes(nir_function_impl *impl)
+{
+   void *mem_ctx = ralloc_parent(impl);
+
+   unsigned *work = calloc(impl->num_blocks, sizeof(unsigned));
+   unsigned *has_already = calloc(impl->num_blocks, sizeof(unsigned));
+
+   /*
+    * Since the work flags already prevent us from inserting a node that has
+    * ever been inserted into W, we don't need to use a set to represent W.
+    * Also, since no block can ever be inserted into W more than once, we know
+    * that the maximum size of W is the number of basic blocks in the
+    * function. So all we need to handle W is an array and a pointer to the
+    * next element to be inserted and the next element to be removed.
+    */
+   nir_block **W = malloc(impl->num_blocks * sizeof(nir_block *));
+   unsigned w_start, w_end;
+
+   unsigned iter_count = 0;
+
+   nir_index_blocks(impl);
+
+   foreach_list_typed(nir_register, reg, node, &impl->registers) {
+      if (reg->num_array_elems != 0)
+         continue;
+
+      w_start = w_end = 0;
+      iter_count++;
+
+      nir_foreach_def(reg, dest) {
+         nir_instr *def = dest->reg.parent_instr;
+         if (work[def->block->index] < iter_count)
+            W[w_end++] = def->block;
+         work[def->block->index] = iter_count;
+      }
+
+      while (w_start != w_end) {
+         nir_block *cur = W[w_start++];
+         struct set_entry *entry;
+         set_foreach(cur->dom_frontier, entry) {
+            nir_block *next = (nir_block *) entry->key;
+
+            /*
+             * If there's more than one return statement, then the end block
+             * can be a join point for some definitions. However, there are
+             * no instructions in the end block, so nothing would use those
+             * phi nodes. Of course, we couldn't place those phi nodes
+             * anyways due to the restriction of having no instructions in the
+             * end block...
+             */
+            if (next == impl->end_block)
+               continue;
+
+            if (has_already[next->index] < iter_count) {
+               insert_trivial_phi(reg, next, mem_ctx);
+               has_already[next->index] = iter_count;
+               if (work[next->index] < iter_count) {
+                  work[next->index] = iter_count;
+                  W[w_end++] = next;
+               }
+            }
+         }
+      }
+   }
+
+   free(work);
+   free(has_already);
+   free(W);
+}
+
+typedef struct {
+   nir_ssa_def **stack;
+   int index;
+   unsigned num_defs; /** < used to add indices to debug names */
+#ifndef NDEBUG
+   unsigned stack_size;
+#endif
+} reg_state;
+
+typedef struct {
+   reg_state *states;
+   void *mem_ctx;
+   nir_instr *parent_instr;
+   nir_if *parent_if;
+   nir_function_impl *impl;
+
+   /* map from SSA value -> original register */
+   struct hash_table *ssa_map;
+} rewrite_state;
+
+static nir_ssa_def *get_ssa_src(nir_register *reg, rewrite_state *state)
+{
+   unsigned index = reg->index;
+
+   if (state->states[index].index == -1) {
+      /*
+       * We're using an undefined register, create a new undefined SSA value
+       * to preserve the information that this source is undefined
+       */
+      nir_ssa_undef_instr *instr =
+         nir_ssa_undef_instr_create(state->mem_ctx, reg->num_components);
+
+      /*
+       * We could just insert the undefined instruction before the instruction
+       * we're rewriting, but we could be rewriting a phi source in which case
+       * we can't do that, so do the next easiest thing - insert it at the
+       * beginning of the program. In the end, it doesn't really matter where
+       * the undefined instructions are because they're going to be ignored
+       * in the backend.
+       */
+      nir_instr_insert_before_cf_list(&state->impl->body, &instr->instr);
+      return &instr->def;
+   }
+
+   return state->states[index].stack[state->states[index].index];
+}
+
+static bool
+rewrite_use(nir_src *src, void *_state)
+{
+   rewrite_state *state = (rewrite_state *) _state;
+
+   if (src->is_ssa)
+      return true;
+
+   unsigned index = src->reg.reg->index;
+
+   if (state->states[index].stack == NULL)
+      return true;
+
+   nir_ssa_def *def = get_ssa_src(src->reg.reg, state);
+   if (state->parent_instr)
+      nir_instr_rewrite_src(state->parent_instr, src, nir_src_for_ssa(def));
+   else
+      nir_if_rewrite_condition(state->parent_if, nir_src_for_ssa(def));
+
+   return true;
+}
+
+static bool
+rewrite_def_forwards(nir_dest *dest, void *_state)
+{
+   rewrite_state *state = (rewrite_state *) _state;
+
+   if (dest->is_ssa)
+      return true;
+
+   nir_register *reg = dest->reg.reg;
+   unsigned index = reg->index;
+
+   if (state->states[index].stack == NULL)
+      return true;
+
+   char *name = NULL;
+   if (dest->reg.reg->name)
+      name = ralloc_asprintf(state->mem_ctx, "%s_%u", dest->reg.reg->name,
+                             state->states[index].num_defs);
+
+   list_del(&dest->reg.def_link);
+   nir_ssa_dest_init(state->parent_instr, dest, reg->num_components, name);
+
+   /* push our SSA destination on the stack */
+   state->states[index].index++;
+   assert(state->states[index].index < state->states[index].stack_size);
+   state->states[index].stack[state->states[index].index] = &dest->ssa;
+   state->states[index].num_defs++;
+
+   _mesa_hash_table_insert(state->ssa_map, &dest->ssa, reg);
+
+   return true;
+}
+
+static void
+rewrite_alu_instr_forward(nir_alu_instr *instr, rewrite_state *state)
+{
+   state->parent_instr = &instr->instr;
+
+   nir_foreach_src(&instr->instr, rewrite_use, state);
+
+   if (instr->dest.dest.is_ssa)
+      return;
+
+   nir_register *reg = instr->dest.dest.reg.reg;
+   unsigned index = reg->index;
+
+   if (state->states[index].stack == NULL)
+      return;
+
+   unsigned write_mask = instr->dest.write_mask;
+   if (write_mask != (1 << instr->dest.dest.reg.reg->num_components) - 1) {
+      /*
+       * Calculate the number of components the final instruction, which for
+       * per-component things is the number of output components of the
+       * instruction and non-per-component things is the number of enabled
+       * channels in the write mask.
+       */
+      unsigned num_components;
+      if (nir_op_infos[instr->op].output_size == 0) {
+         unsigned temp = (write_mask & 0x5) + ((write_mask >> 1) & 0x5);
+         num_components = (temp & 0x3) + ((temp >> 2) & 0x3);
+      } else {
+         num_components = nir_op_infos[instr->op].output_size;
+      }
+
+      char *name = NULL;
+      if (instr->dest.dest.reg.reg->name)
+         name = ralloc_asprintf(state->mem_ctx, "%s_%u",
+                                reg->name, state->states[index].num_defs);
+
+      instr->dest.write_mask = (1 << num_components) - 1;
+      list_del(&instr->dest.dest.reg.def_link);
+      nir_ssa_dest_init(&instr->instr, &instr->dest.dest, num_components, name);
+
+      if (nir_op_infos[instr->op].output_size == 0) {
+         /*
+          * When we change the output writemask, we need to change the
+          * swizzles for per-component inputs too
+          */
+         for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) {
+            if (nir_op_infos[instr->op].input_sizes[i] != 0)
+               continue;
+
+            unsigned new_swizzle[4] = {0, 0, 0, 0};
+
+            /*
+             * We keep two indices:
+             * 1. The index of the original (non-SSA) component
+             * 2. The index of the post-SSA, compacted, component
+             *
+             * We need to map the swizzle component at index 1 to the swizzle
+             * component at index 2.
+             */
+
+            unsigned ssa_index = 0;
+            for (unsigned index = 0; index < 4; index++) {
+               if (!((write_mask >> index) & 1))
+                  continue;
+
+               new_swizzle[ssa_index] = instr->src[i].swizzle[index];
+               ssa_index++;
+            }
+
+            for (unsigned j = 0; j < 4; j++)
+               instr->src[i].swizzle[j] = new_swizzle[j];
+         }
+      }
+
+      nir_op op;
+      switch (reg->num_components) {
+      case 2: op = nir_op_vec2; break;
+      case 3: op = nir_op_vec3; break;
+      case 4: op = nir_op_vec4; break;
+      default: unreachable("not reached");
+      }
+
+      nir_alu_instr *vec = nir_alu_instr_create(state->mem_ctx, op);
+
+      vec->dest.dest.reg.reg = reg;
+      vec->dest.write_mask = (1 << reg->num_components) - 1;
+
+      nir_ssa_def *old_src = get_ssa_src(reg, state);
+      nir_ssa_def *new_src = &instr->dest.dest.ssa;
+
+      unsigned ssa_index = 0;
+      for (unsigned i = 0; i < reg->num_components; i++) {
+         vec->src[i].src.is_ssa = true;
+         if ((write_mask >> i) & 1) {
+            vec->src[i].src.ssa = new_src;
+            if (nir_op_infos[instr->op].output_size == 0)
+               vec->src[i].swizzle[0] = ssa_index;
+            else
+               vec->src[i].swizzle[0] = i;
+            ssa_index++;
+         } else {
+            vec->src[i].src.ssa = old_src;
+            vec->src[i].swizzle[0] = i;
+         }
+      }
+
+      nir_instr_insert_after(&instr->instr, &vec->instr);
+
+      state->parent_instr = &vec->instr;
+      rewrite_def_forwards(&vec->dest.dest, state);
+   } else {
+      rewrite_def_forwards(&instr->dest.dest, state);
+   }
+}
+
+static void
+rewrite_phi_instr(nir_phi_instr *instr, rewrite_state *state)
+{
+   state->parent_instr = &instr->instr;
+   rewrite_def_forwards(&instr->dest, state);
+}
+
+static void
+rewrite_instr_forward(nir_instr *instr, rewrite_state *state)
+{
+   if (instr->type == nir_instr_type_alu) {
+      rewrite_alu_instr_forward(nir_instr_as_alu(instr), state);
+      return;
+   }
+
+   if (instr->type == nir_instr_type_phi) {
+      rewrite_phi_instr(nir_instr_as_phi(instr), state);
+      return;
+   }
+
+   state->parent_instr = instr;
+
+   nir_foreach_src(instr, rewrite_use, state);
+   nir_foreach_dest(instr, rewrite_def_forwards, state);
+}
+
+static void
+rewrite_phi_sources(nir_block *block, nir_block *pred, rewrite_state *state)
+{
+   nir_foreach_instr(block, instr) {
+      if (instr->type != nir_instr_type_phi)
+         break;
+
+      nir_phi_instr *phi_instr = nir_instr_as_phi(instr);
+
+      state->parent_instr = instr;
+
+      nir_foreach_phi_src(phi_instr, src) {
+         if (src->pred == pred) {
+            rewrite_use(&src->src, state);
+            break;
+         }
+      }
+   }
+}
+
+static bool
+rewrite_def_backwards(nir_dest *dest, void *_state)
+{
+   rewrite_state *state = (rewrite_state *) _state;
+
+   if (!dest->is_ssa)
+      return true;
+
+   struct hash_entry *entry =
+      _mesa_hash_table_search(state->ssa_map, &dest->ssa);
+
+   if (!entry)
+      return true;
+
+   nir_register *reg = (nir_register *) entry->data;
+   unsigned index = reg->index;
+
+   state->states[index].index--;
+   assert(state->states[index].index >= -1);
+
+   return true;
+}
+
+static void
+rewrite_instr_backwards(nir_instr *instr, rewrite_state *state)
+{
+   nir_foreach_dest(instr, rewrite_def_backwards, state);
+}
+
+static void
+rewrite_block(nir_block *block, rewrite_state *state)
+{
+   /* This will skip over any instructions after the current one, which is
+    * what we want because those instructions (vector gather, conditional
+    * select) will already be in SSA form.
+    */
+   nir_foreach_instr_safe(block, instr) {
+      rewrite_instr_forward(instr, state);
+   }
+
+   if (block != state->impl->end_block &&
+       !nir_cf_node_is_last(&block->cf_node) &&
+       nir_cf_node_next(&block->cf_node)->type == nir_cf_node_if) {
+      nir_if *if_stmt = nir_cf_node_as_if(nir_cf_node_next(&block->cf_node));
+      state->parent_instr = NULL;
+      state->parent_if = if_stmt;
+      rewrite_use(&if_stmt->condition, state);
+   }
+
+   if (block->successors[0])
+      rewrite_phi_sources(block->successors[0], block, state);
+   if (block->successors[1])
+      rewrite_phi_sources(block->successors[1], block, state);
+
+   for (unsigned i = 0; i < block->num_dom_children; i++)
+      rewrite_block(block->dom_children[i], state);
+
+   nir_foreach_instr_reverse(block, instr) {
+      rewrite_instr_backwards(instr, state);
+   }
+}
+
+static void
+remove_unused_regs(nir_function_impl *impl, rewrite_state *state)
+{
+   foreach_list_typed_safe(nir_register, reg, node, &impl->registers) {
+      if (state->states[reg->index].stack != NULL)
+         exec_node_remove(&reg->node);
+   }
+}
+
+static void
+init_rewrite_state(nir_function_impl *impl, rewrite_state *state)
+{
+   state->impl = impl;
+   state->mem_ctx = ralloc_parent(impl);
+   state->ssa_map = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
+                                            _mesa_key_pointer_equal);
+   state->states = ralloc_array(NULL, reg_state, impl->reg_alloc);
+
+   foreach_list_typed(nir_register, reg, node, &impl->registers) {
+      assert(reg->index < impl->reg_alloc);
+      if (reg->num_array_elems > 0) {
+         state->states[reg->index].stack = NULL;
+      } else {
+         /*
+          * Calculate a conservative estimate of the stack size based on the
+          * number of definitions there are. Note that this function *must* be
+          * called after phi nodes are inserted so we can count phi node
+          * definitions too.
+          */
+         unsigned stack_size = list_length(&reg->defs);
+
+         state->states[reg->index].stack = ralloc_array(state->states,
+                                                        nir_ssa_def *,
+                                                        stack_size);
+#ifndef NDEBUG
+         state->states[reg->index].stack_size = stack_size;
+#endif
+         state->states[reg->index].index = -1;
+         state->states[reg->index].num_defs = 0;
+      }
+   }
+}
+
+static void
+destroy_rewrite_state(rewrite_state *state)
+{
+   _mesa_hash_table_destroy(state->ssa_map, NULL);
+   ralloc_free(state->states);
+}
+
+void
+nir_convert_to_ssa_impl(nir_function_impl *impl)
+{
+   nir_metadata_require(impl, nir_metadata_dominance);
+
+   insert_phi_nodes(impl);
+
+   rewrite_state state;
+   init_rewrite_state(impl, &state);
+
+   rewrite_block(nir_start_block(impl), &state);
+
+   remove_unused_regs(impl, &state);
+
+   nir_metadata_preserve(impl, nir_metadata_block_index |
+                               nir_metadata_dominance);
+
+   destroy_rewrite_state(&state);
+}
+
+void
+nir_convert_to_ssa(nir_shader *shader)
+{
+   nir_foreach_function(shader, function) {
+      if (function->impl)
+         nir_convert_to_ssa_impl(function->impl);
+   }
+}
diff --git a/src/compiler/nir/nir_validate.c b/src/compiler/nir/nir_validate.c
new file mode 100644
index 00000000000..1a943d76314
--- /dev/null
+++ b/src/compiler/nir/nir_validate.c
@@ -0,0 +1,1076 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Connor Abbott ([email protected])
+ *
+ */
+
+#include "nir.h"
+#include <assert.h>
+
+/*
+ * This file checks for invalid IR indicating a bug somewhere in the compiler.
+ */
+
+/* Since this file is just a pile of asserts, don't bother compiling it if
+ * we're not building a debug build.
+ */
+#ifdef DEBUG
+
+/*
+ * Per-register validation state.
+ */
+
+typedef struct {
+   /*
+    * equivalent to the uses and defs in nir_register, but built up by the
+    * validator. At the end, we verify that the sets have the same entries.
+    */
+   struct set *uses, *if_uses, *defs;
+   nir_function_impl *where_defined; /* NULL for global registers */
+} reg_validate_state;
+
+typedef struct {
+   /*
+    * equivalent to the uses in nir_ssa_def, but built up by the validator.
+    * At the end, we verify that the sets have the same entries.
+    */
+   struct set *uses, *if_uses;
+   nir_function_impl *where_defined;
+} ssa_def_validate_state;
+
+typedef struct {
+   /* map of register -> validation state (struct above) */
+   struct hash_table *regs;
+
+   /* the current shader being validated */
+   nir_shader *shader;
+
+   /* the current instruction being validated */
+   nir_instr *instr;
+
+   /* the current basic block being validated */
+   nir_block *block;
+
+   /* the current if statement being validated */
+   nir_if *if_stmt;
+
+   /* the current loop being visited */
+   nir_loop *loop;
+
+   /* the parent of the current cf node being visited */
+   nir_cf_node *parent_node;
+
+   /* the current function implementation being validated */
+   nir_function_impl *impl;
+
+   /* map of SSA value -> function implementation where it is defined */
+   struct hash_table *ssa_defs;
+
+   /* bitset of ssa definitions we have found; used to check uniqueness */
+   BITSET_WORD *ssa_defs_found;
+
+   /* bitset of registers we have currently found; used to check uniqueness */
+   BITSET_WORD *regs_found;
+
+   /* map of local variable -> function implementation where it is defined */
+   struct hash_table *var_defs;
+} validate_state;
+
+static void validate_src(nir_src *src, validate_state *state);
+
+static void
+validate_reg_src(nir_src *src, validate_state *state)
+{
+   assert(src->reg.reg != NULL);
+
+   struct hash_entry *entry;
+   entry = _mesa_hash_table_search(state->regs, src->reg.reg);
+   assert(entry);
+
+   reg_validate_state *reg_state = (reg_validate_state *) entry->data;
+
+   if (state->instr) {
+      _mesa_set_add(reg_state->uses, src);
+   } else {
+      assert(state->if_stmt);
+      _mesa_set_add(reg_state->if_uses, src);
+   }
+
+   if (!src->reg.reg->is_global) {
+      assert(reg_state->where_defined == state->impl &&
+             "using a register declared in a different function");
+   }
+
+   assert((src->reg.reg->num_array_elems == 0 ||
+          src->reg.base_offset < src->reg.reg->num_array_elems) &&
+          "definitely out-of-bounds array access");
+
+   if (src->reg.indirect) {
+      assert(src->reg.reg->num_array_elems != 0);
+      assert((src->reg.indirect->is_ssa ||
+              src->reg.indirect->reg.indirect == NULL) &&
+             "only one level of indirection allowed");
+      validate_src(src->reg.indirect, state);
+   }
+}
+
+static void
+validate_ssa_src(nir_src *src, validate_state *state)
+{
+   assert(src->ssa != NULL);
+
+   struct hash_entry *entry = _mesa_hash_table_search(state->ssa_defs, src->ssa);
+
+   assert(entry);
+
+   ssa_def_validate_state *def_state = (ssa_def_validate_state *)entry->data;
+
+   assert(def_state->where_defined == state->impl &&
+          "using an SSA value defined in a different function");
+
+   if (state->instr) {
+      _mesa_set_add(def_state->uses, src);
+   } else {
+      assert(state->if_stmt);
+      _mesa_set_add(def_state->if_uses, src);
+   }
+
+   /* TODO validate that the use is dominated by the definition */
+}
+
+static void
+validate_src(nir_src *src, validate_state *state)
+{
+   if (state->instr)
+      assert(src->parent_instr == state->instr);
+   else
+      assert(src->parent_if == state->if_stmt);
+
+   if (src->is_ssa)
+      validate_ssa_src(src, state);
+   else
+      validate_reg_src(src, state);
+}
+
+static void
+validate_alu_src(nir_alu_instr *instr, unsigned index, validate_state *state)
+{
+   nir_alu_src *src = &instr->src[index];
+
+   unsigned num_components;
+   if (src->src.is_ssa)
+      num_components = src->src.ssa->num_components;
+   else {
+      if (src->src.reg.reg->is_packed)
+         num_components = 4; /* can't check anything */
+      else
+         num_components = src->src.reg.reg->num_components;
+   }
+   for (unsigned i = 0; i < 4; i++) {
+      assert(src->swizzle[i] < 4);
+
+      if (nir_alu_instr_channel_used(instr, index, i))
+         assert(src->swizzle[i] < num_components);
+   }
+
+   validate_src(&src->src, state);
+}
+
+static void
+validate_reg_dest(nir_reg_dest *dest, validate_state *state)
+{
+   assert(dest->reg != NULL);
+
+   assert(dest->parent_instr == state->instr);
+
+   struct hash_entry *entry2;
+   entry2 = _mesa_hash_table_search(state->regs, dest->reg);
+
+   assert(entry2);
+
+   reg_validate_state *reg_state = (reg_validate_state *) entry2->data;
+   _mesa_set_add(reg_state->defs, dest);
+
+   if (!dest->reg->is_global) {
+      assert(reg_state->where_defined == state->impl &&
+             "writing to a register declared in a different function");
+   }
+
+   assert((dest->reg->num_array_elems == 0 ||
+          dest->base_offset < dest->reg->num_array_elems) &&
+          "definitely out-of-bounds array access");
+
+   if (dest->indirect) {
+      assert(dest->reg->num_array_elems != 0);
+      assert((dest->indirect->is_ssa || dest->indirect->reg.indirect == NULL) &&
+             "only one level of indirection allowed");
+      validate_src(dest->indirect, state);
+   }
+}
+
+static void
+validate_ssa_def(nir_ssa_def *def, validate_state *state)
+{
+   assert(def->index < state->impl->ssa_alloc);
+   assert(!BITSET_TEST(state->ssa_defs_found, def->index));
+   BITSET_SET(state->ssa_defs_found, def->index);
+
+   assert(def->parent_instr == state->instr);
+
+   assert(def->num_components <= 4);
+
+   list_validate(&def->uses);
+   list_validate(&def->if_uses);
+
+   ssa_def_validate_state *def_state = ralloc(state->ssa_defs,
+                                              ssa_def_validate_state);
+   def_state->where_defined = state->impl;
+   def_state->uses = _mesa_set_create(def_state, _mesa_hash_pointer,
+                                      _mesa_key_pointer_equal);
+   def_state->if_uses = _mesa_set_create(def_state, _mesa_hash_pointer,
+                                         _mesa_key_pointer_equal);
+   _mesa_hash_table_insert(state->ssa_defs, def, def_state);
+}
+
+static void
+validate_dest(nir_dest *dest, validate_state *state)
+{
+   if (dest->is_ssa)
+      validate_ssa_def(&dest->ssa, state);
+   else
+      validate_reg_dest(&dest->reg, state);
+}
+
+static void
+validate_alu_dest(nir_alu_dest *dest, validate_state *state)
+{
+   unsigned dest_size =
+      dest->dest.is_ssa ? dest->dest.ssa.num_components
+                        : dest->dest.reg.reg->num_components;
+   bool is_packed = !dest->dest.is_ssa && dest->dest.reg.reg->is_packed;
+   /*
+    * validate that the instruction doesn't write to components not in the
+    * register/SSA value
+    */
+   assert(is_packed || !(dest->write_mask & ~((1 << dest_size) - 1)));
+
+   /* validate that saturate is only ever used on instructions with
+    * destinations of type float
+    */
+   nir_alu_instr *alu = nir_instr_as_alu(state->instr);
+   assert(nir_op_infos[alu->op].output_type == nir_type_float ||
+          !dest->saturate);
+
+   validate_dest(&dest->dest, state);
+}
+
+static void
+validate_alu_instr(nir_alu_instr *instr, validate_state *state)
+{
+   assert(instr->op < nir_num_opcodes);
+
+   for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) {
+      validate_alu_src(instr, i, state);
+   }
+
+   validate_alu_dest(&instr->dest, state);
+}
+
+static void
+validate_deref_chain(nir_deref *deref, validate_state *state)
+{
+   assert(deref->child == NULL || ralloc_parent(deref->child) == deref);
+
+   nir_deref *parent = NULL;
+   while (deref != NULL) {
+      switch (deref->deref_type) {
+      case nir_deref_type_array:
+         assert(deref->type == glsl_get_array_element(parent->type));
+         if (nir_deref_as_array(deref)->deref_array_type ==
+             nir_deref_array_type_indirect)
+            validate_src(&nir_deref_as_array(deref)->indirect, state);
+         break;
+
+      case nir_deref_type_struct:
+         assert(deref->type ==
+                glsl_get_struct_field(parent->type,
+                                      nir_deref_as_struct(deref)->index));
+         break;
+
+      case nir_deref_type_var:
+         break;
+
+      default:
+         assert(!"Invalid deref type");
+         break;
+      }
+
+      parent = deref;
+      deref = deref->child;
+   }
+}
+
+static void
+validate_var_use(nir_variable *var, validate_state *state)
+{
+   if (var->data.mode == nir_var_local) {
+      struct hash_entry *entry = _mesa_hash_table_search(state->var_defs, var);
+
+      assert(entry);
+      assert((nir_function_impl *) entry->data == state->impl);
+   }
+}
+
+static void
+validate_deref_var(void *parent_mem_ctx, nir_deref_var *deref, validate_state *state)
+{
+   assert(deref != NULL);
+   assert(ralloc_parent(deref) == parent_mem_ctx);
+   assert(deref->deref.type == deref->var->type);
+
+   validate_var_use(deref->var, state);
+
+   validate_deref_chain(&deref->deref, state);
+}
+
+static void
+validate_intrinsic_instr(nir_intrinsic_instr *instr, validate_state *state)
+{
+   unsigned num_srcs = nir_intrinsic_infos[instr->intrinsic].num_srcs;
+   for (unsigned i = 0; i < num_srcs; i++) {
+      unsigned components_read =
+         nir_intrinsic_infos[instr->intrinsic].src_components[i];
+      if (components_read == 0)
+         components_read = instr->num_components;
+
+      assert(components_read > 0);
+
+      if (instr->src[i].is_ssa) {
+         assert(components_read <= instr->src[i].ssa->num_components);
+      } else if (!instr->src[i].reg.reg->is_packed) {
+         assert(components_read <= instr->src[i].reg.reg->num_components);
+      }
+
+      validate_src(&instr->src[i], state);
+   }
+
+   unsigned num_vars = nir_intrinsic_infos[instr->intrinsic].num_variables;
+   for (unsigned i = 0; i < num_vars; i++) {
+      validate_deref_var(instr, instr->variables[i], state);
+   }
+
+   if (nir_intrinsic_infos[instr->intrinsic].has_dest) {
+      unsigned components_written =
+         nir_intrinsic_infos[instr->intrinsic].dest_components;
+      if (components_written == 0)
+         components_written = instr->num_components;
+
+      assert(components_written > 0);
+
+      if (instr->dest.is_ssa) {
+         assert(components_written <= instr->dest.ssa.num_components);
+      } else if (!instr->dest.reg.reg->is_packed) {
+         assert(components_written <= instr->dest.reg.reg->num_components);
+      }
+
+      validate_dest(&instr->dest, state);
+   }
+
+   switch (instr->intrinsic) {
+   case nir_intrinsic_load_var: {
+      const struct glsl_type *type =
+         nir_deref_tail(&instr->variables[0]->deref)->type;
+      assert(glsl_type_is_vector_or_scalar(type) ||
+             (instr->variables[0]->var->data.mode == nir_var_uniform &&
+              glsl_get_base_type(type) == GLSL_TYPE_SUBROUTINE));
+      assert(instr->num_components == glsl_get_vector_elements(type));
+      break;
+   }
+   case nir_intrinsic_store_var: {
+      const struct glsl_type *type =
+         nir_deref_tail(&instr->variables[0]->deref)->type;
+      assert(glsl_type_is_vector_or_scalar(type) ||
+             (instr->variables[0]->var->data.mode == nir_var_uniform &&
+              glsl_get_base_type(type) == GLSL_TYPE_SUBROUTINE));
+      assert(instr->num_components == glsl_get_vector_elements(type));
+      assert(instr->variables[0]->var->data.mode != nir_var_shader_in &&
+             instr->variables[0]->var->data.mode != nir_var_uniform &&
+             instr->variables[0]->var->data.mode != nir_var_shader_storage);
+      assert((instr->const_index[0] & ~((1 << instr->num_components) - 1)) == 0);
+      break;
+   }
+   case nir_intrinsic_copy_var:
+      assert(nir_deref_tail(&instr->variables[0]->deref)->type ==
+             nir_deref_tail(&instr->variables[1]->deref)->type);
+      assert(instr->variables[0]->var->data.mode != nir_var_shader_in &&
+             instr->variables[0]->var->data.mode != nir_var_uniform &&
+             instr->variables[0]->var->data.mode != nir_var_shader_storage);
+      break;
+   default:
+      break;
+   }
+}
+
+static void
+validate_tex_instr(nir_tex_instr *instr, validate_state *state)
+{
+   bool src_type_seen[nir_num_tex_src_types];
+   for (unsigned i = 0; i < nir_num_tex_src_types; i++)
+      src_type_seen[i] = false;
+
+   for (unsigned i = 0; i < instr->num_srcs; i++) {
+      assert(!src_type_seen[instr->src[i].src_type]);
+      src_type_seen[instr->src[i].src_type] = true;
+      validate_src(&instr->src[i].src, state);
+   }
+
+   if (instr->sampler != NULL)
+      validate_deref_var(instr, instr->sampler, state);
+
+   validate_dest(&instr->dest, state);
+}
+
+static void
+validate_call_instr(nir_call_instr *instr, validate_state *state)
+{
+   if (instr->return_deref == NULL) {
+      assert(glsl_type_is_void(instr->callee->return_type));
+   } else {
+      assert(instr->return_deref->deref.type == instr->callee->return_type);
+      validate_deref_var(instr, instr->return_deref, state);
+   }
+
+   assert(instr->num_params == instr->callee->num_params);
+
+   for (unsigned i = 0; i < instr->num_params; i++) {
+      assert(instr->callee->params[i].type == instr->params[i]->deref.type);
+      validate_deref_var(instr, instr->params[i], state);
+   }
+}
+
+static void
+validate_load_const_instr(nir_load_const_instr *instr, validate_state *state)
+{
+   validate_ssa_def(&instr->def, state);
+}
+
+static void
+validate_ssa_undef_instr(nir_ssa_undef_instr *instr, validate_state *state)
+{
+   validate_ssa_def(&instr->def, state);
+}
+
+static void
+validate_phi_instr(nir_phi_instr *instr, validate_state *state)
+{
+   /*
+    * don't validate the sources until we get to them from their predecessor
+    * basic blocks, to avoid validating an SSA use before its definition.
+    */
+
+   validate_dest(&instr->dest, state);
+
+   exec_list_validate(&instr->srcs);
+   assert(exec_list_length(&instr->srcs) ==
+          state->block->predecessors->entries);
+}
+
+static void
+validate_instr(nir_instr *instr, validate_state *state)
+{
+   assert(instr->block == state->block);
+
+   state->instr = instr;
+
+   switch (instr->type) {
+   case nir_instr_type_alu:
+      validate_alu_instr(nir_instr_as_alu(instr), state);
+      break;
+
+   case nir_instr_type_call:
+      validate_call_instr(nir_instr_as_call(instr), state);
+      break;
+
+   case nir_instr_type_intrinsic:
+      validate_intrinsic_instr(nir_instr_as_intrinsic(instr), state);
+      break;
+
+   case nir_instr_type_tex:
+      validate_tex_instr(nir_instr_as_tex(instr), state);
+      break;
+
+   case nir_instr_type_load_const:
+      validate_load_const_instr(nir_instr_as_load_const(instr), state);
+      break;
+
+   case nir_instr_type_phi:
+      validate_phi_instr(nir_instr_as_phi(instr), state);
+      break;
+
+   case nir_instr_type_ssa_undef:
+      validate_ssa_undef_instr(nir_instr_as_ssa_undef(instr), state);
+      break;
+
+   case nir_instr_type_jump:
+      break;
+
+   default:
+      assert(!"Invalid ALU instruction type");
+      break;
+   }
+
+   state->instr = NULL;
+}
+
+static void
+validate_phi_src(nir_phi_instr *instr, nir_block *pred, validate_state *state)
+{
+   state->instr = &instr->instr;
+
+   assert(instr->dest.is_ssa);
+
+   exec_list_validate(&instr->srcs);
+   nir_foreach_phi_src(instr, src) {
+      if (src->pred == pred) {
+         assert(src->src.is_ssa);
+         assert(src->src.ssa->num_components ==
+                instr->dest.ssa.num_components);
+
+         validate_src(&src->src, state);
+         state->instr = NULL;
+         return;
+      }
+   }
+
+   abort();
+}
+
+static void
+validate_phi_srcs(nir_block *block, nir_block *succ, validate_state *state)
+{
+   nir_foreach_instr(succ, instr) {
+      if (instr->type != nir_instr_type_phi)
+         break;
+
+      validate_phi_src(nir_instr_as_phi(instr), block, state);
+   }
+}
+
+static void validate_cf_node(nir_cf_node *node, validate_state *state);
+
+static void
+validate_block(nir_block *block, validate_state *state)
+{
+   assert(block->cf_node.parent == state->parent_node);
+
+   state->block = block;
+
+   exec_list_validate(&block->instr_list);
+   nir_foreach_instr(block, instr) {
+      if (instr->type == nir_instr_type_phi) {
+         assert(instr == nir_block_first_instr(block) ||
+                nir_instr_prev(instr)->type == nir_instr_type_phi);
+      }
+
+      if (instr->type == nir_instr_type_jump) {
+         assert(instr == nir_block_last_instr(block));
+      }
+
+      validate_instr(instr, state);
+   }
+
+   assert(block->successors[0] != NULL);
+   assert(block->successors[0] != block->successors[1]);
+
+   for (unsigned i = 0; i < 2; i++) {
+      if (block->successors[i] != NULL) {
+         struct set_entry *entry =
+            _mesa_set_search(block->successors[i]->predecessors, block);
+         assert(entry);
+
+         validate_phi_srcs(block, block->successors[i], state);
+      }
+   }
+
+   struct set_entry *entry;
+   set_foreach(block->predecessors, entry) {
+      const nir_block *pred = entry->key;
+      assert(pred->successors[0] == block ||
+             pred->successors[1] == block);
+   }
+
+   if (!exec_list_is_empty(&block->instr_list) &&
+       nir_block_last_instr(block)->type == nir_instr_type_jump) {
+      assert(block->successors[1] == NULL);
+      nir_jump_instr *jump = nir_instr_as_jump(nir_block_last_instr(block));
+      switch (jump->type) {
+      case nir_jump_break: {
+         nir_block *after =
+            nir_cf_node_as_block(nir_cf_node_next(&state->loop->cf_node));
+         assert(block->successors[0] == after);
+         break;
+      }
+
+      case nir_jump_continue: {
+         nir_block *first =
+            nir_cf_node_as_block(nir_loop_first_cf_node(state->loop));
+         assert(block->successors[0] == first);
+         break;
+      }
+
+      case nir_jump_return:
+         assert(block->successors[0] == state->impl->end_block);
+         break;
+
+      default:
+         unreachable("bad jump type");
+      }
+   } else {
+      nir_cf_node *next = nir_cf_node_next(&block->cf_node);
+      if (next == NULL) {
+         switch (state->parent_node->type) {
+         case nir_cf_node_loop: {
+            nir_block *first =
+               nir_cf_node_as_block(nir_loop_first_cf_node(state->loop));
+            assert(block->successors[0] == first);
+            /* due to the hack for infinite loops, block->successors[1] may
+             * point to the block after the loop.
+             */
+            break;
+         }
+
+         case nir_cf_node_if: {
+            nir_block *after =
+               nir_cf_node_as_block(nir_cf_node_next(state->parent_node));
+            assert(block->successors[0] == after);
+            assert(block->successors[1] == NULL);
+            break;
+         }
+
+         case nir_cf_node_function:
+            assert(block->successors[0] == state->impl->end_block);
+            assert(block->successors[1] == NULL);
+            break;
+
+         default:
+            unreachable("unknown control flow node type");
+         }
+      } else {
+         if (next->type == nir_cf_node_if) {
+            nir_if *if_stmt = nir_cf_node_as_if(next);
+            assert(&block->successors[0]->cf_node ==
+                   nir_if_first_then_node(if_stmt));
+            assert(&block->successors[1]->cf_node ==
+                   nir_if_first_else_node(if_stmt));
+         } else {
+            assert(next->type == nir_cf_node_loop);
+            nir_loop *loop = nir_cf_node_as_loop(next);
+            assert(&block->successors[0]->cf_node ==
+                   nir_loop_first_cf_node(loop));
+            assert(block->successors[1] == NULL);
+         }
+      }
+   }
+}
+
+static void
+validate_if(nir_if *if_stmt, validate_state *state)
+{
+   state->if_stmt = if_stmt;
+
+   assert(!exec_node_is_head_sentinel(if_stmt->cf_node.node.prev));
+   nir_cf_node *prev_node = nir_cf_node_prev(&if_stmt->cf_node);
+   assert(prev_node->type == nir_cf_node_block);
+
+   assert(!exec_node_is_tail_sentinel(if_stmt->cf_node.node.next));
+   nir_cf_node *next_node = nir_cf_node_next(&if_stmt->cf_node);
+   assert(next_node->type == nir_cf_node_block);
+
+   validate_src(&if_stmt->condition, state);
+
+   assert(!exec_list_is_empty(&if_stmt->then_list));
+   assert(!exec_list_is_empty(&if_stmt->else_list));
+
+   nir_cf_node *old_parent = state->parent_node;
+   state->parent_node = &if_stmt->cf_node;
+
+   exec_list_validate(&if_stmt->then_list);
+   foreach_list_typed(nir_cf_node, cf_node, node, &if_stmt->then_list) {
+      validate_cf_node(cf_node, state);
+   }
+
+   exec_list_validate(&if_stmt->else_list);
+   foreach_list_typed(nir_cf_node, cf_node, node, &if_stmt->else_list) {
+      validate_cf_node(cf_node, state);
+   }
+
+   state->parent_node = old_parent;
+   state->if_stmt = NULL;
+}
+
+static void
+validate_loop(nir_loop *loop, validate_state *state)
+{
+   assert(!exec_node_is_head_sentinel(loop->cf_node.node.prev));
+   nir_cf_node *prev_node = nir_cf_node_prev(&loop->cf_node);
+   assert(prev_node->type == nir_cf_node_block);
+
+   assert(!exec_node_is_tail_sentinel(loop->cf_node.node.next));
+   nir_cf_node *next_node = nir_cf_node_next(&loop->cf_node);
+   assert(next_node->type == nir_cf_node_block);
+
+   assert(!exec_list_is_empty(&loop->body));
+
+   nir_cf_node *old_parent = state->parent_node;
+   state->parent_node = &loop->cf_node;
+   nir_loop *old_loop = state->loop;
+   state->loop = loop;
+
+   exec_list_validate(&loop->body);
+   foreach_list_typed(nir_cf_node, cf_node, node, &loop->body) {
+      validate_cf_node(cf_node, state);
+   }
+
+   state->parent_node = old_parent;
+   state->loop = old_loop;
+}
+
+static void
+validate_cf_node(nir_cf_node *node, validate_state *state)
+{
+   assert(node->parent == state->parent_node);
+
+   switch (node->type) {
+   case nir_cf_node_block:
+      validate_block(nir_cf_node_as_block(node), state);
+      break;
+
+   case nir_cf_node_if:
+      validate_if(nir_cf_node_as_if(node), state);
+      break;
+
+   case nir_cf_node_loop:
+      validate_loop(nir_cf_node_as_loop(node), state);
+      break;
+
+   default:
+      unreachable("Invalid CF node type");
+   }
+}
+
+static void
+prevalidate_reg_decl(nir_register *reg, bool is_global, validate_state *state)
+{
+   assert(reg->is_global == is_global);
+
+   if (is_global)
+      assert(reg->index < state->shader->reg_alloc);
+   else
+      assert(reg->index < state->impl->reg_alloc);
+   assert(!BITSET_TEST(state->regs_found, reg->index));
+   BITSET_SET(state->regs_found, reg->index);
+
+   list_validate(&reg->uses);
+   list_validate(&reg->defs);
+   list_validate(&reg->if_uses);
+
+   reg_validate_state *reg_state = ralloc(state->regs, reg_validate_state);
+   reg_state->uses = _mesa_set_create(reg_state, _mesa_hash_pointer,
+                                      _mesa_key_pointer_equal);
+   reg_state->if_uses = _mesa_set_create(reg_state, _mesa_hash_pointer,
+                                         _mesa_key_pointer_equal);
+   reg_state->defs = _mesa_set_create(reg_state, _mesa_hash_pointer,
+                                      _mesa_key_pointer_equal);
+
+   reg_state->where_defined = is_global ? NULL : state->impl;
+
+   _mesa_hash_table_insert(state->regs, reg, reg_state);
+}
+
+static void
+postvalidate_reg_decl(nir_register *reg, validate_state *state)
+{
+   struct hash_entry *entry = _mesa_hash_table_search(state->regs, reg);
+
+   reg_validate_state *reg_state = (reg_validate_state *) entry->data;
+
+   nir_foreach_use(reg, src) {
+      struct set_entry *entry = _mesa_set_search(reg_state->uses, src);
+      assert(entry);
+      _mesa_set_remove(reg_state->uses, entry);
+   }
+
+   if (reg_state->uses->entries != 0) {
+      printf("extra entries in register uses:\n");
+      struct set_entry *entry;
+      set_foreach(reg_state->uses, entry)
+         printf("%p\n", entry->key);
+
+      abort();
+   }
+
+   nir_foreach_if_use(reg, src) {
+      struct set_entry *entry = _mesa_set_search(reg_state->if_uses, src);
+      assert(entry);
+      _mesa_set_remove(reg_state->if_uses, entry);
+   }
+
+   if (reg_state->if_uses->entries != 0) {
+      printf("extra entries in register if_uses:\n");
+      struct set_entry *entry;
+      set_foreach(reg_state->if_uses, entry)
+         printf("%p\n", entry->key);
+
+      abort();
+   }
+
+   nir_foreach_def(reg, src) {
+      struct set_entry *entry = _mesa_set_search(reg_state->defs, src);
+      assert(entry);
+      _mesa_set_remove(reg_state->defs, entry);
+   }
+
+   if (reg_state->defs->entries != 0) {
+      printf("extra entries in register defs:\n");
+      struct set_entry *entry;
+      set_foreach(reg_state->defs, entry)
+         printf("%p\n", entry->key);
+
+      abort();
+   }
+}
+
+static void
+validate_var_decl(nir_variable *var, bool is_global, validate_state *state)
+{
+   assert(is_global != (var->data.mode == nir_var_local));
+
+   /*
+    * TODO validate some things ir_validate.cpp does (requires more GLSL type
+    * support)
+    */
+
+   if (!is_global) {
+      _mesa_hash_table_insert(state->var_defs, var, state->impl);
+   }
+}
+
+static bool
+postvalidate_ssa_def(nir_ssa_def *def, void *void_state)
+{
+   validate_state *state = void_state;
+
+   struct hash_entry *entry = _mesa_hash_table_search(state->ssa_defs, def);
+   ssa_def_validate_state *def_state = (ssa_def_validate_state *)entry->data;
+
+   nir_foreach_use(def, src) {
+      struct set_entry *entry = _mesa_set_search(def_state->uses, src);
+      assert(entry);
+      _mesa_set_remove(def_state->uses, entry);
+   }
+
+   if (def_state->uses->entries != 0) {
+      printf("extra entries in register uses:\n");
+      struct set_entry *entry;
+      set_foreach(def_state->uses, entry)
+         printf("%p\n", entry->key);
+
+      abort();
+   }
+
+   nir_foreach_if_use(def, src) {
+      struct set_entry *entry = _mesa_set_search(def_state->if_uses, src);
+      assert(entry);
+      _mesa_set_remove(def_state->if_uses, entry);
+   }
+
+   if (def_state->if_uses->entries != 0) {
+      printf("extra entries in register uses:\n");
+      struct set_entry *entry;
+      set_foreach(def_state->if_uses, entry)
+         printf("%p\n", entry->key);
+
+      abort();
+   }
+
+   return true;
+}
+
+static bool
+postvalidate_ssa_defs_block(nir_block *block, void *state)
+{
+   nir_foreach_instr(block, instr)
+      nir_foreach_ssa_def(instr, postvalidate_ssa_def, state);
+
+   return true;
+}
+
+static void
+validate_function_impl(nir_function_impl *impl, validate_state *state)
+{
+   assert(impl->function->impl == impl);
+   assert(impl->cf_node.parent == NULL);
+
+   assert(impl->num_params == impl->function->num_params);
+   for (unsigned i = 0; i < impl->num_params; i++)
+      assert(impl->params[i]->type == impl->function->params[i].type);
+
+   if (glsl_type_is_void(impl->function->return_type))
+      assert(impl->return_var == NULL);
+   else
+      assert(impl->return_var->type == impl->function->return_type);
+
+   assert(exec_list_is_empty(&impl->end_block->instr_list));
+   assert(impl->end_block->successors[0] == NULL);
+   assert(impl->end_block->successors[1] == NULL);
+
+   state->impl = impl;
+   state->parent_node = &impl->cf_node;
+
+   exec_list_validate(&impl->locals);
+   nir_foreach_variable(var, &impl->locals) {
+      validate_var_decl(var, false, state);
+   }
+
+   state->regs_found = realloc(state->regs_found,
+                               BITSET_WORDS(impl->reg_alloc) *
+                               sizeof(BITSET_WORD));
+   memset(state->regs_found, 0, BITSET_WORDS(impl->reg_alloc) *
+                                sizeof(BITSET_WORD));
+   exec_list_validate(&impl->registers);
+   foreach_list_typed(nir_register, reg, node, &impl->registers) {
+      prevalidate_reg_decl(reg, false, state);
+   }
+
+   state->ssa_defs_found = realloc(state->ssa_defs_found,
+                                   BITSET_WORDS(impl->ssa_alloc) *
+                                   sizeof(BITSET_WORD));
+   memset(state->ssa_defs_found, 0, BITSET_WORDS(impl->ssa_alloc) *
+                                    sizeof(BITSET_WORD));
+   exec_list_validate(&impl->body);
+   foreach_list_typed(nir_cf_node, node, node, &impl->body) {
+      validate_cf_node(node, state);
+   }
+
+   foreach_list_typed(nir_register, reg, node, &impl->registers) {
+      postvalidate_reg_decl(reg, state);
+   }
+
+   nir_foreach_block(impl, postvalidate_ssa_defs_block, state);
+}
+
+static void
+validate_function(nir_function *func, validate_state *state)
+{
+   if (func->impl != NULL) {
+      assert(func->impl->function == func);
+      validate_function_impl(func->impl, state);
+   }
+}
+
+static void
+init_validate_state(validate_state *state)
+{
+   state->regs = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
+                                         _mesa_key_pointer_equal);
+   state->ssa_defs = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
+                                             _mesa_key_pointer_equal);
+   state->ssa_defs_found = NULL;
+   state->regs_found = NULL;
+   state->var_defs = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
+                                             _mesa_key_pointer_equal);
+   state->loop = NULL;
+}
+
+static void
+destroy_validate_state(validate_state *state)
+{
+   _mesa_hash_table_destroy(state->regs, NULL);
+   _mesa_hash_table_destroy(state->ssa_defs, NULL);
+   free(state->ssa_defs_found);
+   free(state->regs_found);
+   _mesa_hash_table_destroy(state->var_defs, NULL);
+}
+
+void
+nir_validate_shader(nir_shader *shader)
+{
+   validate_state state;
+   init_validate_state(&state);
+
+   state.shader = shader;
+
+   exec_list_validate(&shader->uniforms);
+   nir_foreach_variable(var, &shader->uniforms) {
+      validate_var_decl(var, true, &state);
+   }
+
+   exec_list_validate(&shader->inputs);
+   nir_foreach_variable(var, &shader->inputs) {
+     validate_var_decl(var, true, &state);
+   }
+
+   exec_list_validate(&shader->outputs);
+   nir_foreach_variable(var, &shader->outputs) {
+     validate_var_decl(var, true, &state);
+   }
+
+   exec_list_validate(&shader->shared);
+   nir_foreach_variable(var, &shader->shared) {
+      validate_var_decl(var, true, &state);
+   }
+
+   exec_list_validate(&shader->globals);
+   nir_foreach_variable(var, &shader->globals) {
+     validate_var_decl(var, true, &state);
+   }
+
+   exec_list_validate(&shader->system_values);
+   nir_foreach_variable(var, &shader->system_values) {
+     validate_var_decl(var, true, &state);
+   }
+
+   state.regs_found = realloc(state.regs_found,
+                              BITSET_WORDS(shader->reg_alloc) *
+                              sizeof(BITSET_WORD));
+   memset(state.regs_found, 0, BITSET_WORDS(shader->reg_alloc) *
+                               sizeof(BITSET_WORD));
+   exec_list_validate(&shader->registers);
+   foreach_list_typed(nir_register, reg, node, &shader->registers) {
+      prevalidate_reg_decl(reg, true, &state);
+   }
+
+   exec_list_validate(&shader->functions);
+   foreach_list_typed(nir_function, func, node, &shader->functions) {
+      validate_function(func, &state);
+   }
+
+   foreach_list_typed(nir_register, reg, node, &shader->registers) {
+      postvalidate_reg_decl(reg, &state);
+   }
+
+   destroy_validate_state(&state);
+}
+
+#endif /* NDEBUG */
diff --git a/src/compiler/nir/nir_vla.h b/src/compiler/nir/nir_vla.h
new file mode 100644
index 00000000000..753783316a2
--- /dev/null
+++ b/src/compiler/nir/nir_vla.h
@@ -0,0 +1,54 @@
+/**************************************************************************
+ *
+ * Copyright 2015 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#pragma once
+
+
+#include "c99_alloca.h"
+
+
+/* Declare a variable length array, with no initialization */
+#define NIR_VLA(_type, _name, _length) \
+   _type *_name = alloca((_length) * sizeof *_name)
+
+
+/* Declare a variable length array, and initialize it with the given byte.
+ *
+ * _length is evaluated twice, so expressions with side-effects must be
+ * avoided.
+ */
+#define NIR_VLA_FILL(_type, _name, _length, _byte) \
+   _type *_name = memset(alloca((_length) * sizeof *_name), _byte, (_length) * sizeof *_name)
+
+
+/* Declare a variable length array, and zero it.
+ *
+ * Just like NIR_VLA_FILL, _length is evaluated twice, so expressions with
+ * side-effects must be avoided.
+ */
+#define NIR_VLA_ZERO(_type, _name, _length) \
+   NIR_VLA_FILL(_type, _name, _length, 0)
diff --git a/src/compiler/nir/nir_worklist.c b/src/compiler/nir/nir_worklist.c
new file mode 100644
index 00000000000..3087a1d2354
--- /dev/null
+++ b/src/compiler/nir/nir_worklist.c
@@ -0,0 +1,144 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir_worklist.h"
+
+void
+nir_block_worklist_init(nir_block_worklist *w, unsigned num_blocks,
+                        void *mem_ctx)
+{
+   w->size = num_blocks;
+   w->count = 0;
+   w->start = 0;
+
+   w->blocks_present = rzalloc_array(mem_ctx, BITSET_WORD,
+                                     BITSET_WORDS(num_blocks));
+   w->blocks = ralloc_array(mem_ctx, nir_block *, num_blocks);
+}
+
+void
+nir_block_worklist_fini(nir_block_worklist *w)
+{
+   ralloc_free(w->blocks_present);
+   ralloc_free(w->blocks);
+}
+
+static bool
+worklist_add_block(nir_block *block, void *w)
+{
+   nir_block_worklist_push_tail(w, block);
+
+   return true;
+}
+
+void
+nir_block_worklist_add_all(nir_block_worklist *w, nir_function_impl *impl)
+{
+   nir_foreach_block(impl, worklist_add_block, w);
+}
+
+void
+nir_block_worklist_push_head(nir_block_worklist *w, nir_block *block)
+{
+   /* Pushing a block we already have is a no-op */
+   if (BITSET_TEST(w->blocks_present, block->index))
+      return;
+
+   assert(w->count < w->size);
+
+   if (w->start == 0)
+      w->start = w->size - 1;
+   else
+      w->start--;
+
+   w->count++;
+
+   w->blocks[w->start] = block;
+   BITSET_SET(w->blocks_present, block->index);
+}
+
+nir_block *
+nir_block_worklist_peek_head(const nir_block_worklist *w)
+{
+   assert(w->count > 0);
+
+   return w->blocks[w->start];
+}
+
+nir_block *
+nir_block_worklist_pop_head(nir_block_worklist *w)
+{
+   assert(w->count > 0);
+
+   unsigned head = w->start;
+
+   w->start = (w->start + 1) % w->size;
+   w->count--;
+
+   BITSET_CLEAR(w->blocks_present, w->blocks[head]->index);
+   return w->blocks[head];
+}
+
+void
+nir_block_worklist_push_tail(nir_block_worklist *w, nir_block *block)
+{
+   /* Pushing a block we already have is a no-op */
+   if (BITSET_TEST(w->blocks_present, block->index))
+      return;
+
+   assert(w->count < w->size);
+
+   w->count++;
+
+   unsigned tail = (w->start + w->count - 1) % w->size;
+
+   w->blocks[tail] = block;
+   BITSET_SET(w->blocks_present, block->index);
+}
+
+nir_block *
+nir_block_worklist_peek_tail(const nir_block_worklist *w)
+{
+   assert(w->count > 0);
+
+   unsigned tail = (w->start + w->count - 1) % w->size;
+
+   return w->blocks[tail];
+}
+
+nir_block *
+nir_block_worklist_pop_tail(nir_block_worklist *w)
+{
+   assert(w->count > 0);
+
+   unsigned tail = (w->start + w->count - 1) % w->size;
+
+   w->count--;
+
+   BITSET_CLEAR(w->blocks_present, w->blocks[tail]->index);
+   return w->blocks[tail];
+}
diff --git a/src/compiler/nir/nir_worklist.h b/src/compiler/nir/nir_worklist.h
new file mode 100644
index 00000000000..829bff24a55
--- /dev/null
+++ b/src/compiler/nir/nir_worklist.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#pragma once
+
+#ifndef _NIR_WORKLIST_
+#define _NIR_WORKLIST_
+
+#include "nir.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Represents a double-ended queue of unique blocks
+ *
+ * The worklist datastructure guarantees that eacy block is in the queue at
+ * most once.  Pushing a block onto either end of the queue is a no-op if
+ * the block is already in the queue.  In order for this to work, the
+ * caller must ensure that the blocks are properly indexed.
+ */
+typedef struct {
+   /* The total size of the worklist */
+   unsigned size;
+
+   /* The number of blocks currently in the worklist */
+   unsigned count;
+
+   /* The offset in the array of blocks at which the list starts */
+   unsigned start;
+
+   /* A bitset of all of the blocks currently present in the worklist */
+   BITSET_WORD *blocks_present;
+
+   /* The actual worklist */
+   nir_block **blocks;
+} nir_block_worklist;
+
+void nir_block_worklist_init(nir_block_worklist *w, unsigned num_blocks,
+                             void *mem_ctx);
+void nir_block_worklist_fini(nir_block_worklist *w);
+
+void nir_block_worklist_add_all(nir_block_worklist *w, nir_function_impl *impl);
+
+static inline bool
+nir_block_worklist_is_empty(const nir_block_worklist *w)
+{
+   return w->count == 0;
+}
+
+void nir_block_worklist_push_head(nir_block_worklist *w, nir_block *block);
+
+nir_block *nir_block_worklist_peek_head(const nir_block_worklist *w);
+
+nir_block *nir_block_worklist_pop_head(nir_block_worklist *w);
+
+void nir_block_worklist_push_tail(nir_block_worklist *w, nir_block *block);
+
+nir_block *nir_block_worklist_peek_tail(const nir_block_worklist *w);
+
+nir_block *nir_block_worklist_pop_tail(nir_block_worklist *w);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* _NIR_WORKLIST_ */
diff --git a/src/compiler/nir/spirv/GLSL.std.450.h b/src/compiler/nir/spirv/GLSL.std.450.h
new file mode 100644
index 00000000000..d1c9b5c1d44
--- /dev/null
+++ b/src/compiler/nir/spirv/GLSL.std.450.h
@@ -0,0 +1,127 @@
+/*
+** Copyright (c) 2014-2015 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a copy
+** of this software and/or associated documentation files (the "Materials"),
+** to deal in the Materials without restriction, including without limitation
+** the rights to use, copy, modify, merge, publish, distribute, sublicense,
+** and/or sell copies of the Materials, and to permit persons to whom the
+** Materials are furnished to do so, subject to the following conditions:
+**
+** The above copyright notice and this permission notice shall be included in
+** all copies or substantial portions of the Materials.
+**
+** MODIFICATIONS TO THIS FILE MAY MEAN IT NO LONGER ACCURATELY REFLECTS KHRONOS
+** STANDARDS. THE UNMODIFIED, NORMATIVE VERSIONS OF KHRONOS SPECIFICATIONS AND
+** HEADER INFORMATION ARE LOCATED AT https://www.khronos.org/registry/ 
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+** OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+** THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+** FROM,OUT OF OR IN CONNECTION WITH THE MATERIALS OR THE USE OR OTHER DEALINGS
+** IN THE MATERIALS.
+*/
+
+#ifndef GLSLstd450_H
+#define GLSLstd450_H
+
+const int GLSLstd450Version = 99;
+const int GLSLstd450Revision = 3;
+
+enum GLSLstd450 {
+    GLSLstd450Bad = 0,              // Don't use
+
+    GLSLstd450Round = 1,
+    GLSLstd450RoundEven = 2,
+    GLSLstd450Trunc = 3,
+    GLSLstd450FAbs = 4,
+    GLSLstd450SAbs = 5,
+    GLSLstd450FSign = 6,
+    GLSLstd450SSign = 7,
+    GLSLstd450Floor = 8,
+    GLSLstd450Ceil = 9,
+    GLSLstd450Fract = 10,
+
+    GLSLstd450Radians = 11,
+    GLSLstd450Degrees = 12,
+    GLSLstd450Sin = 13,
+    GLSLstd450Cos = 14,
+    GLSLstd450Tan = 15,
+    GLSLstd450Asin = 16,
+    GLSLstd450Acos = 17,
+    GLSLstd450Atan = 18,
+    GLSLstd450Sinh = 19,
+    GLSLstd450Cosh = 20,
+    GLSLstd450Tanh = 21,
+    GLSLstd450Asinh = 22,
+    GLSLstd450Acosh = 23,
+    GLSLstd450Atanh = 24,
+    GLSLstd450Atan2 = 25,
+
+    GLSLstd450Pow = 26,
+    GLSLstd450Exp = 27,
+    GLSLstd450Log = 28,
+    GLSLstd450Exp2 = 29,
+    GLSLstd450Log2 = 30,
+    GLSLstd450Sqrt = 31,
+    GLSLstd450InverseSqrt = 32,
+
+    GLSLstd450Determinant = 33,
+    GLSLstd450MatrixInverse = 34,
+
+    GLSLstd450Modf = 35,            // second operand needs an OpVariable to write to
+    GLSLstd450ModfStruct = 36,      // no OpVariable operand
+    GLSLstd450FMin = 37,
+    GLSLstd450UMin = 38,
+    GLSLstd450SMin = 39,
+    GLSLstd450FMax = 40,
+    GLSLstd450UMax = 41,
+    GLSLstd450SMax = 42,
+    GLSLstd450FClamp = 43,
+    GLSLstd450UClamp = 44,
+    GLSLstd450SClamp = 45,
+    GLSLstd450FMix = 46,
+    GLSLstd450IMix = 47,
+    GLSLstd450Step = 48,
+    GLSLstd450SmoothStep = 49,
+
+    GLSLstd450Fma = 50,
+    GLSLstd450Frexp = 51,            // second operand needs an OpVariable to write to
+    GLSLstd450FrexpStruct = 52,      // no OpVariable operand
+    GLSLstd450Ldexp = 53,
+
+    GLSLstd450PackSnorm4x8 = 54,
+    GLSLstd450PackUnorm4x8 = 55,
+    GLSLstd450PackSnorm2x16 = 56,
+    GLSLstd450PackUnorm2x16 = 57,
+    GLSLstd450PackHalf2x16 = 58,
+    GLSLstd450PackDouble2x32 = 59,
+    GLSLstd450UnpackSnorm2x16 = 60,
+    GLSLstd450UnpackUnorm2x16 = 61,
+    GLSLstd450UnpackHalf2x16 = 62,
+    GLSLstd450UnpackSnorm4x8 = 63,
+    GLSLstd450UnpackUnorm4x8 = 64,
+    GLSLstd450UnpackDouble2x32 = 65,
+
+    GLSLstd450Length = 66,
+    GLSLstd450Distance = 67,
+    GLSLstd450Cross = 68,
+    GLSLstd450Normalize = 69,
+    GLSLstd450FaceForward = 70,
+    GLSLstd450Reflect = 71,
+    GLSLstd450Refract = 72,
+
+    GLSLstd450FindILsb = 73,
+    GLSLstd450FindSMsb = 74,
+    GLSLstd450FindUMsb = 75,
+
+    GLSLstd450InterpolateAtCentroid = 76,
+    GLSLstd450InterpolateAtSample = 77,
+    GLSLstd450InterpolateAtOffset = 78,
+
+    GLSLstd450Count
+};
+
+#endif  // #ifndef GLSLstd450_H
diff --git a/src/compiler/nir/spirv/nir_spirv.h b/src/compiler/nir/spirv/nir_spirv.h
new file mode 100644
index 00000000000..500f2cb94df
--- /dev/null
+++ b/src/compiler/nir/spirv/nir_spirv.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#pragma once
+
+#ifndef _NIR_SPIRV_H_
+#define _NIR_SPIRV_H_
+
+#include "nir/nir.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct nir_spirv_specialization {
+   uint32_t id;
+   uint32_t data;
+};
+
+nir_function *spirv_to_nir(const uint32_t *words, size_t word_count,
+                           struct nir_spirv_specialization *specializations,
+                           unsigned num_specializations,
+                           gl_shader_stage stage, const char *entry_point_name,
+                           const nir_shader_compiler_options *options);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _NIR_SPIRV_H_ */
diff --git a/src/compiler/nir/spirv/spirv.h b/src/compiler/nir/spirv/spirv.h
new file mode 100644
index 00000000000..63bcb2f88dd
--- /dev/null
+++ b/src/compiler/nir/spirv/spirv.h
@@ -0,0 +1,870 @@
+/*
+** Copyright (c) 2014-2015 The Khronos Group Inc.
+** 
+** Permission is hereby granted, free of charge, to any person obtaining a copy
+** of this software and/or associated documentation files (the "Materials"),
+** to deal in the Materials without restriction, including without limitation
+** the rights to use, copy, modify, merge, publish, distribute, sublicense,
+** and/or sell copies of the Materials, and to permit persons to whom the
+** Materials are furnished to do so, subject to the following conditions:
+** 
+** The above copyright notice and this permission notice shall be included in
+** all copies or substantial portions of the Materials.
+** 
+** MODIFICATIONS TO THIS FILE MAY MEAN IT NO LONGER ACCURATELY REFLECTS KHRONOS
+** STANDARDS. THE UNMODIFIED, NORMATIVE VERSIONS OF KHRONOS SPECIFICATIONS AND
+** HEADER INFORMATION ARE LOCATED AT https://www.khronos.org/registry/ 
+** 
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+** OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+** THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+** FROM,OUT OF OR IN CONNECTION WITH THE MATERIALS OR THE USE OR OTHER DEALINGS
+** IN THE MATERIALS.
+*/
+
+/*
+** This header is automatically generated by the same tool that creates
+** the Binary Section of the SPIR-V specification.
+*/
+
+/*
+** Enumeration tokens for SPIR-V, in various styles:
+**   C, C++, C++11, JSON, Lua, Python
+** 
+** - C will have tokens with a "Spv" prefix, e.g.: SpvSourceLanguageGLSL
+** - C++ will have tokens in the "spv" name space, e.g.: spv::SourceLanguageGLSL
+** - C++11 will use enum classes in the spv namespace, e.g.: spv::SourceLanguage::GLSL
+** - Lua will use tables, e.g.: spv.SourceLanguage.GLSL
+** - Python will use dictionaries, e.g.: spv['SourceLanguage']['GLSL']
+** 
+** Some tokens act like mask values, which can be OR'd together,
+** while others are mutually exclusive.  The mask-like ones have
+** "Mask" in their name, and a parallel enum that has the shift
+** amount (1 << x) for each corresponding enumerant.
+*/
+
+#ifndef spirv_H
+#define spirv_H
+
+typedef unsigned int SpvId;
+
+#define SPV_VERSION 0x10000
+#define SPV_REVISION 2
+
+static const unsigned int SpvMagicNumber = 0x07230203;
+static const unsigned int SpvVersion = 0x00010000;
+static const unsigned int SpvRevision = 2;
+static const unsigned int SpvOpCodeMask = 0xffff;
+static const unsigned int SpvWordCountShift = 16;
+
+typedef enum SpvSourceLanguage_ {
+    SpvSourceLanguageUnknown = 0,
+    SpvSourceLanguageESSL = 1,
+    SpvSourceLanguageGLSL = 2,
+    SpvSourceLanguageOpenCL_C = 3,
+    SpvSourceLanguageOpenCL_CPP = 4,
+} SpvSourceLanguage;
+
+typedef enum SpvExecutionModel_ {
+    SpvExecutionModelVertex = 0,
+    SpvExecutionModelTessellationControl = 1,
+    SpvExecutionModelTessellationEvaluation = 2,
+    SpvExecutionModelGeometry = 3,
+    SpvExecutionModelFragment = 4,
+    SpvExecutionModelGLCompute = 5,
+    SpvExecutionModelKernel = 6,
+} SpvExecutionModel;
+
+typedef enum SpvAddressingModel_ {
+    SpvAddressingModelLogical = 0,
+    SpvAddressingModelPhysical32 = 1,
+    SpvAddressingModelPhysical64 = 2,
+} SpvAddressingModel;
+
+typedef enum SpvMemoryModel_ {
+    SpvMemoryModelSimple = 0,
+    SpvMemoryModelGLSL450 = 1,
+    SpvMemoryModelOpenCL = 2,
+} SpvMemoryModel;
+
+typedef enum SpvExecutionMode_ {
+    SpvExecutionModeInvocations = 0,
+    SpvExecutionModeSpacingEqual = 1,
+    SpvExecutionModeSpacingFractionalEven = 2,
+    SpvExecutionModeSpacingFractionalOdd = 3,
+    SpvExecutionModeVertexOrderCw = 4,
+    SpvExecutionModeVertexOrderCcw = 5,
+    SpvExecutionModePixelCenterInteger = 6,
+    SpvExecutionModeOriginUpperLeft = 7,
+    SpvExecutionModeOriginLowerLeft = 8,
+    SpvExecutionModeEarlyFragmentTests = 9,
+    SpvExecutionModePointMode = 10,
+    SpvExecutionModeXfb = 11,
+    SpvExecutionModeDepthReplacing = 12,
+    SpvExecutionModeDepthGreater = 14,
+    SpvExecutionModeDepthLess = 15,
+    SpvExecutionModeDepthUnchanged = 16,
+    SpvExecutionModeLocalSize = 17,
+    SpvExecutionModeLocalSizeHint = 18,
+    SpvExecutionModeInputPoints = 19,
+    SpvExecutionModeInputLines = 20,
+    SpvExecutionModeInputLinesAdjacency = 21,
+    SpvExecutionModeTriangles = 22,
+    SpvExecutionModeInputTrianglesAdjacency = 23,
+    SpvExecutionModeQuads = 24,
+    SpvExecutionModeIsolines = 25,
+    SpvExecutionModeOutputVertices = 26,
+    SpvExecutionModeOutputPoints = 27,
+    SpvExecutionModeOutputLineStrip = 28,
+    SpvExecutionModeOutputTriangleStrip = 29,
+    SpvExecutionModeVecTypeHint = 30,
+    SpvExecutionModeContractionOff = 31,
+} SpvExecutionMode;
+
+typedef enum SpvStorageClass_ {
+    SpvStorageClassUniformConstant = 0,
+    SpvStorageClassInput = 1,
+    SpvStorageClassUniform = 2,
+    SpvStorageClassOutput = 3,
+    SpvStorageClassWorkgroup = 4,
+    SpvStorageClassCrossWorkgroup = 5,
+    SpvStorageClassPrivate = 6,
+    SpvStorageClassFunction = 7,
+    SpvStorageClassGeneric = 8,
+    SpvStorageClassPushConstant = 9,
+    SpvStorageClassAtomicCounter = 10,
+    SpvStorageClassImage = 11,
+} SpvStorageClass;
+
+typedef enum SpvDim_ {
+    SpvDim1D = 0,
+    SpvDim2D = 1,
+    SpvDim3D = 2,
+    SpvDimCube = 3,
+    SpvDimRect = 4,
+    SpvDimBuffer = 5,
+    SpvDimSubpassData = 6,
+} SpvDim;
+
+typedef enum SpvSamplerAddressingMode_ {
+    SpvSamplerAddressingModeNone = 0,
+    SpvSamplerAddressingModeClampToEdge = 1,
+    SpvSamplerAddressingModeClamp = 2,
+    SpvSamplerAddressingModeRepeat = 3,
+    SpvSamplerAddressingModeRepeatMirrored = 4,
+} SpvSamplerAddressingMode;
+
+typedef enum SpvSamplerFilterMode_ {
+    SpvSamplerFilterModeNearest = 0,
+    SpvSamplerFilterModeLinear = 1,
+} SpvSamplerFilterMode;
+
+typedef enum SpvImageFormat_ {
+    SpvImageFormatUnknown = 0,
+    SpvImageFormatRgba32f = 1,
+    SpvImageFormatRgba16f = 2,
+    SpvImageFormatR32f = 3,
+    SpvImageFormatRgba8 = 4,
+    SpvImageFormatRgba8Snorm = 5,
+    SpvImageFormatRg32f = 6,
+    SpvImageFormatRg16f = 7,
+    SpvImageFormatR11fG11fB10f = 8,
+    SpvImageFormatR16f = 9,
+    SpvImageFormatRgba16 = 10,
+    SpvImageFormatRgb10A2 = 11,
+    SpvImageFormatRg16 = 12,
+    SpvImageFormatRg8 = 13,
+    SpvImageFormatR16 = 14,
+    SpvImageFormatR8 = 15,
+    SpvImageFormatRgba16Snorm = 16,
+    SpvImageFormatRg16Snorm = 17,
+    SpvImageFormatRg8Snorm = 18,
+    SpvImageFormatR16Snorm = 19,
+    SpvImageFormatR8Snorm = 20,
+    SpvImageFormatRgba32i = 21,
+    SpvImageFormatRgba16i = 22,
+    SpvImageFormatRgba8i = 23,
+    SpvImageFormatR32i = 24,
+    SpvImageFormatRg32i = 25,
+    SpvImageFormatRg16i = 26,
+    SpvImageFormatRg8i = 27,
+    SpvImageFormatR16i = 28,
+    SpvImageFormatR8i = 29,
+    SpvImageFormatRgba32ui = 30,
+    SpvImageFormatRgba16ui = 31,
+    SpvImageFormatRgba8ui = 32,
+    SpvImageFormatR32ui = 33,
+    SpvImageFormatRgb10a2ui = 34,
+    SpvImageFormatRg32ui = 35,
+    SpvImageFormatRg16ui = 36,
+    SpvImageFormatRg8ui = 37,
+    SpvImageFormatR16ui = 38,
+    SpvImageFormatR8ui = 39,
+} SpvImageFormat;
+
+typedef enum SpvImageChannelOrder_ {
+    SpvImageChannelOrderR = 0,
+    SpvImageChannelOrderA = 1,
+    SpvImageChannelOrderRG = 2,
+    SpvImageChannelOrderRA = 3,
+    SpvImageChannelOrderRGB = 4,
+    SpvImageChannelOrderRGBA = 5,
+    SpvImageChannelOrderBGRA = 6,
+    SpvImageChannelOrderARGB = 7,
+    SpvImageChannelOrderIntensity = 8,
+    SpvImageChannelOrderLuminance = 9,
+    SpvImageChannelOrderRx = 10,
+    SpvImageChannelOrderRGx = 11,
+    SpvImageChannelOrderRGBx = 12,
+    SpvImageChannelOrderDepth = 13,
+    SpvImageChannelOrderDepthStencil = 14,
+    SpvImageChannelOrdersRGB = 15,
+    SpvImageChannelOrdersRGBx = 16,
+    SpvImageChannelOrdersRGBA = 17,
+    SpvImageChannelOrdersBGRA = 18,
+} SpvImageChannelOrder;
+
+typedef enum SpvImageChannelDataType_ {
+    SpvImageChannelDataTypeSnormInt8 = 0,
+    SpvImageChannelDataTypeSnormInt16 = 1,
+    SpvImageChannelDataTypeUnormInt8 = 2,
+    SpvImageChannelDataTypeUnormInt16 = 3,
+    SpvImageChannelDataTypeUnormShort565 = 4,
+    SpvImageChannelDataTypeUnormShort555 = 5,
+    SpvImageChannelDataTypeUnormInt101010 = 6,
+    SpvImageChannelDataTypeSignedInt8 = 7,
+    SpvImageChannelDataTypeSignedInt16 = 8,
+    SpvImageChannelDataTypeSignedInt32 = 9,
+    SpvImageChannelDataTypeUnsignedInt8 = 10,
+    SpvImageChannelDataTypeUnsignedInt16 = 11,
+    SpvImageChannelDataTypeUnsignedInt32 = 12,
+    SpvImageChannelDataTypeHalfFloat = 13,
+    SpvImageChannelDataTypeFloat = 14,
+    SpvImageChannelDataTypeUnormInt24 = 15,
+    SpvImageChannelDataTypeUnormInt101010_2 = 16,
+} SpvImageChannelDataType;
+
+typedef enum SpvImageOperandsShift_ {
+    SpvImageOperandsBiasShift = 0,
+    SpvImageOperandsLodShift = 1,
+    SpvImageOperandsGradShift = 2,
+    SpvImageOperandsConstOffsetShift = 3,
+    SpvImageOperandsOffsetShift = 4,
+    SpvImageOperandsConstOffsetsShift = 5,
+    SpvImageOperandsSampleShift = 6,
+    SpvImageOperandsMinLodShift = 7,
+} SpvImageOperandsShift;
+
+typedef enum SpvImageOperandsMask_ {
+    SpvImageOperandsMaskNone = 0,
+    SpvImageOperandsBiasMask = 0x00000001,
+    SpvImageOperandsLodMask = 0x00000002,
+    SpvImageOperandsGradMask = 0x00000004,
+    SpvImageOperandsConstOffsetMask = 0x00000008,
+    SpvImageOperandsOffsetMask = 0x00000010,
+    SpvImageOperandsConstOffsetsMask = 0x00000020,
+    SpvImageOperandsSampleMask = 0x00000040,
+    SpvImageOperandsMinLodMask = 0x00000080,
+} SpvImageOperandsMask;
+
+typedef enum SpvFPFastMathModeShift_ {
+    SpvFPFastMathModeNotNaNShift = 0,
+    SpvFPFastMathModeNotInfShift = 1,
+    SpvFPFastMathModeNSZShift = 2,
+    SpvFPFastMathModeAllowRecipShift = 3,
+    SpvFPFastMathModeFastShift = 4,
+} SpvFPFastMathModeShift;
+
+typedef enum SpvFPFastMathModeMask_ {
+    SpvFPFastMathModeMaskNone = 0,
+    SpvFPFastMathModeNotNaNMask = 0x00000001,
+    SpvFPFastMathModeNotInfMask = 0x00000002,
+    SpvFPFastMathModeNSZMask = 0x00000004,
+    SpvFPFastMathModeAllowRecipMask = 0x00000008,
+    SpvFPFastMathModeFastMask = 0x00000010,
+} SpvFPFastMathModeMask;
+
+typedef enum SpvFPRoundingMode_ {
+    SpvFPRoundingModeRTE = 0,
+    SpvFPRoundingModeRTZ = 1,
+    SpvFPRoundingModeRTP = 2,
+    SpvFPRoundingModeRTN = 3,
+} SpvFPRoundingMode;
+
+typedef enum SpvLinkageType_ {
+    SpvLinkageTypeExport = 0,
+    SpvLinkageTypeImport = 1,
+} SpvLinkageType;
+
+typedef enum SpvAccessQualifier_ {
+    SpvAccessQualifierReadOnly = 0,
+    SpvAccessQualifierWriteOnly = 1,
+    SpvAccessQualifierReadWrite = 2,
+} SpvAccessQualifier;
+
+typedef enum SpvFunctionParameterAttribute_ {
+    SpvFunctionParameterAttributeZext = 0,
+    SpvFunctionParameterAttributeSext = 1,
+    SpvFunctionParameterAttributeByVal = 2,
+    SpvFunctionParameterAttributeSret = 3,
+    SpvFunctionParameterAttributeNoAlias = 4,
+    SpvFunctionParameterAttributeNoCapture = 5,
+    SpvFunctionParameterAttributeNoWrite = 6,
+    SpvFunctionParameterAttributeNoReadWrite = 7,
+} SpvFunctionParameterAttribute;
+
+typedef enum SpvDecoration_ {
+    SpvDecorationRelaxedPrecision = 0,
+    SpvDecorationSpecId = 1,
+    SpvDecorationBlock = 2,
+    SpvDecorationBufferBlock = 3,
+    SpvDecorationRowMajor = 4,
+    SpvDecorationColMajor = 5,
+    SpvDecorationArrayStride = 6,
+    SpvDecorationMatrixStride = 7,
+    SpvDecorationGLSLShared = 8,
+    SpvDecorationGLSLPacked = 9,
+    SpvDecorationCPacked = 10,
+    SpvDecorationBuiltIn = 11,
+    SpvDecorationNoPerspective = 13,
+    SpvDecorationFlat = 14,
+    SpvDecorationPatch = 15,
+    SpvDecorationCentroid = 16,
+    SpvDecorationSample = 17,
+    SpvDecorationInvariant = 18,
+    SpvDecorationRestrict = 19,
+    SpvDecorationAliased = 20,
+    SpvDecorationVolatile = 21,
+    SpvDecorationConstant = 22,
+    SpvDecorationCoherent = 23,
+    SpvDecorationNonWritable = 24,
+    SpvDecorationNonReadable = 25,
+    SpvDecorationUniform = 26,
+    SpvDecorationSaturatedConversion = 28,
+    SpvDecorationStream = 29,
+    SpvDecorationLocation = 30,
+    SpvDecorationComponent = 31,
+    SpvDecorationIndex = 32,
+    SpvDecorationBinding = 33,
+    SpvDecorationDescriptorSet = 34,
+    SpvDecorationOffset = 35,
+    SpvDecorationXfbBuffer = 36,
+    SpvDecorationXfbStride = 37,
+    SpvDecorationFuncParamAttr = 38,
+    SpvDecorationFPRoundingMode = 39,
+    SpvDecorationFPFastMathMode = 40,
+    SpvDecorationLinkageAttributes = 41,
+    SpvDecorationNoContraction = 42,
+    SpvDecorationInputAttachmentIndex = 43,
+    SpvDecorationAlignment = 44,
+} SpvDecoration;
+
+typedef enum SpvBuiltIn_ {
+    SpvBuiltInPosition = 0,
+    SpvBuiltInPointSize = 1,
+    SpvBuiltInClipDistance = 3,
+    SpvBuiltInCullDistance = 4,
+    SpvBuiltInVertexId = 5,
+    SpvBuiltInInstanceId = 6,
+    SpvBuiltInPrimitiveId = 7,
+    SpvBuiltInInvocationId = 8,
+    SpvBuiltInLayer = 9,
+    SpvBuiltInViewportIndex = 10,
+    SpvBuiltInTessLevelOuter = 11,
+    SpvBuiltInTessLevelInner = 12,
+    SpvBuiltInTessCoord = 13,
+    SpvBuiltInPatchVertices = 14,
+    SpvBuiltInFragCoord = 15,
+    SpvBuiltInPointCoord = 16,
+    SpvBuiltInFrontFacing = 17,
+    SpvBuiltInSampleId = 18,
+    SpvBuiltInSamplePosition = 19,
+    SpvBuiltInSampleMask = 20,
+    SpvBuiltInFragDepth = 22,
+    SpvBuiltInHelperInvocation = 23,
+    SpvBuiltInNumWorkgroups = 24,
+    SpvBuiltInWorkgroupSize = 25,
+    SpvBuiltInWorkgroupId = 26,
+    SpvBuiltInLocalInvocationId = 27,
+    SpvBuiltInGlobalInvocationId = 28,
+    SpvBuiltInLocalInvocationIndex = 29,
+    SpvBuiltInWorkDim = 30,
+    SpvBuiltInGlobalSize = 31,
+    SpvBuiltInEnqueuedWorkgroupSize = 32,
+    SpvBuiltInGlobalOffset = 33,
+    SpvBuiltInGlobalLinearId = 34,
+    SpvBuiltInSubgroupSize = 36,
+    SpvBuiltInSubgroupMaxSize = 37,
+    SpvBuiltInNumSubgroups = 38,
+    SpvBuiltInNumEnqueuedSubgroups = 39,
+    SpvBuiltInSubgroupId = 40,
+    SpvBuiltInSubgroupLocalInvocationId = 41,
+    SpvBuiltInVertexIndex = 42,
+    SpvBuiltInInstanceIndex = 43,
+} SpvBuiltIn;
+
+typedef enum SpvSelectionControlShift_ {
+    SpvSelectionControlFlattenShift = 0,
+    SpvSelectionControlDontFlattenShift = 1,
+} SpvSelectionControlShift;
+
+typedef enum SpvSelectionControlMask_ {
+    SpvSelectionControlMaskNone = 0,
+    SpvSelectionControlFlattenMask = 0x00000001,
+    SpvSelectionControlDontFlattenMask = 0x00000002,
+} SpvSelectionControlMask;
+
+typedef enum SpvLoopControlShift_ {
+    SpvLoopControlUnrollShift = 0,
+    SpvLoopControlDontUnrollShift = 1,
+} SpvLoopControlShift;
+
+typedef enum SpvLoopControlMask_ {
+    SpvLoopControlMaskNone = 0,
+    SpvLoopControlUnrollMask = 0x00000001,
+    SpvLoopControlDontUnrollMask = 0x00000002,
+} SpvLoopControlMask;
+
+typedef enum SpvFunctionControlShift_ {
+    SpvFunctionControlInlineShift = 0,
+    SpvFunctionControlDontInlineShift = 1,
+    SpvFunctionControlPureShift = 2,
+    SpvFunctionControlConstShift = 3,
+} SpvFunctionControlShift;
+
+typedef enum SpvFunctionControlMask_ {
+    SpvFunctionControlMaskNone = 0,
+    SpvFunctionControlInlineMask = 0x00000001,
+    SpvFunctionControlDontInlineMask = 0x00000002,
+    SpvFunctionControlPureMask = 0x00000004,
+    SpvFunctionControlConstMask = 0x00000008,
+} SpvFunctionControlMask;
+
+typedef enum SpvMemorySemanticsShift_ {
+    SpvMemorySemanticsAcquireShift = 1,
+    SpvMemorySemanticsReleaseShift = 2,
+    SpvMemorySemanticsAcquireReleaseShift = 3,
+    SpvMemorySemanticsSequentiallyConsistentShift = 4,
+    SpvMemorySemanticsUniformMemoryShift = 6,
+    SpvMemorySemanticsSubgroupMemoryShift = 7,
+    SpvMemorySemanticsWorkgroupMemoryShift = 8,
+    SpvMemorySemanticsCrossWorkgroupMemoryShift = 9,
+    SpvMemorySemanticsAtomicCounterMemoryShift = 10,
+    SpvMemorySemanticsImageMemoryShift = 11,
+} SpvMemorySemanticsShift;
+
+typedef enum SpvMemorySemanticsMask_ {
+    SpvMemorySemanticsMaskNone = 0,
+    SpvMemorySemanticsAcquireMask = 0x00000002,
+    SpvMemorySemanticsReleaseMask = 0x00000004,
+    SpvMemorySemanticsAcquireReleaseMask = 0x00000008,
+    SpvMemorySemanticsSequentiallyConsistentMask = 0x00000010,
+    SpvMemorySemanticsUniformMemoryMask = 0x00000040,
+    SpvMemorySemanticsSubgroupMemoryMask = 0x00000080,
+    SpvMemorySemanticsWorkgroupMemoryMask = 0x00000100,
+    SpvMemorySemanticsCrossWorkgroupMemoryMask = 0x00000200,
+    SpvMemorySemanticsAtomicCounterMemoryMask = 0x00000400,
+    SpvMemorySemanticsImageMemoryMask = 0x00000800,
+} SpvMemorySemanticsMask;
+
+typedef enum SpvMemoryAccessShift_ {
+    SpvMemoryAccessVolatileShift = 0,
+    SpvMemoryAccessAlignedShift = 1,
+    SpvMemoryAccessNontemporalShift = 2,
+} SpvMemoryAccessShift;
+
+typedef enum SpvMemoryAccessMask_ {
+    SpvMemoryAccessMaskNone = 0,
+    SpvMemoryAccessVolatileMask = 0x00000001,
+    SpvMemoryAccessAlignedMask = 0x00000002,
+    SpvMemoryAccessNontemporalMask = 0x00000004,
+} SpvMemoryAccessMask;
+
+typedef enum SpvScope_ {
+    SpvScopeCrossDevice = 0,
+    SpvScopeDevice = 1,
+    SpvScopeWorkgroup = 2,
+    SpvScopeSubgroup = 3,
+    SpvScopeInvocation = 4,
+} SpvScope;
+
+typedef enum SpvGroupOperation_ {
+    SpvGroupOperationReduce = 0,
+    SpvGroupOperationInclusiveScan = 1,
+    SpvGroupOperationExclusiveScan = 2,
+} SpvGroupOperation;
+
+typedef enum SpvKernelEnqueueFlags_ {
+    SpvKernelEnqueueFlagsNoWait = 0,
+    SpvKernelEnqueueFlagsWaitKernel = 1,
+    SpvKernelEnqueueFlagsWaitWorkGroup = 2,
+} SpvKernelEnqueueFlags;
+
+typedef enum SpvKernelProfilingInfoShift_ {
+    SpvKernelProfilingInfoCmdExecTimeShift = 0,
+} SpvKernelProfilingInfoShift;
+
+typedef enum SpvKernelProfilingInfoMask_ {
+    SpvKernelProfilingInfoMaskNone = 0,
+    SpvKernelProfilingInfoCmdExecTimeMask = 0x00000001,
+} SpvKernelProfilingInfoMask;
+
+typedef enum SpvCapability_ {
+    SpvCapabilityMatrix = 0,
+    SpvCapabilityShader = 1,
+    SpvCapabilityGeometry = 2,
+    SpvCapabilityTessellation = 3,
+    SpvCapabilityAddresses = 4,
+    SpvCapabilityLinkage = 5,
+    SpvCapabilityKernel = 6,
+    SpvCapabilityVector16 = 7,
+    SpvCapabilityFloat16Buffer = 8,
+    SpvCapabilityFloat16 = 9,
+    SpvCapabilityFloat64 = 10,
+    SpvCapabilityInt64 = 11,
+    SpvCapabilityInt64Atomics = 12,
+    SpvCapabilityImageBasic = 13,
+    SpvCapabilityImageReadWrite = 14,
+    SpvCapabilityImageMipmap = 15,
+    SpvCapabilityPipes = 17,
+    SpvCapabilityGroups = 18,
+    SpvCapabilityDeviceEnqueue = 19,
+    SpvCapabilityLiteralSampler = 20,
+    SpvCapabilityAtomicStorage = 21,
+    SpvCapabilityInt16 = 22,
+    SpvCapabilityTessellationPointSize = 23,
+    SpvCapabilityGeometryPointSize = 24,
+    SpvCapabilityImageGatherExtended = 25,
+    SpvCapabilityStorageImageMultisample = 27,
+    SpvCapabilityUniformBufferArrayDynamicIndexing = 28,
+    SpvCapabilitySampledImageArrayDynamicIndexing = 29,
+    SpvCapabilityStorageBufferArrayDynamicIndexing = 30,
+    SpvCapabilityStorageImageArrayDynamicIndexing = 31,
+    SpvCapabilityClipDistance = 32,
+    SpvCapabilityCullDistance = 33,
+    SpvCapabilityImageCubeArray = 34,
+    SpvCapabilitySampleRateShading = 35,
+    SpvCapabilityImageRect = 36,
+    SpvCapabilitySampledRect = 37,
+    SpvCapabilityGenericPointer = 38,
+    SpvCapabilityInt8 = 39,
+    SpvCapabilityInputAttachment = 40,
+    SpvCapabilitySparseResidency = 41,
+    SpvCapabilityMinLod = 42,
+    SpvCapabilitySampled1D = 43,
+    SpvCapabilityImage1D = 44,
+    SpvCapabilitySampledCubeArray = 45,
+    SpvCapabilitySampledBuffer = 46,
+    SpvCapabilityImageBuffer = 47,
+    SpvCapabilityImageMSArray = 48,
+    SpvCapabilityStorageImageExtendedFormats = 49,
+    SpvCapabilityImageQuery = 50,
+    SpvCapabilityDerivativeControl = 51,
+    SpvCapabilityInterpolationFunction = 52,
+    SpvCapabilityTransformFeedback = 53,
+    SpvCapabilityGeometryStreams = 54,
+    SpvCapabilityStorageImageReadWithoutFormat = 55,
+    SpvCapabilityStorageImageWriteWithoutFormat = 56,
+    SpvCapabilityMultiViewport = 57,
+} SpvCapability;
+
+typedef enum SpvOp_ {
+    SpvOpNop = 0,
+    SpvOpUndef = 1,
+    SpvOpSourceContinued = 2,
+    SpvOpSource = 3,
+    SpvOpSourceExtension = 4,
+    SpvOpName = 5,
+    SpvOpMemberName = 6,
+    SpvOpString = 7,
+    SpvOpLine = 8,
+    SpvOpExtension = 10,
+    SpvOpExtInstImport = 11,
+    SpvOpExtInst = 12,
+    SpvOpMemoryModel = 14,
+    SpvOpEntryPoint = 15,
+    SpvOpExecutionMode = 16,
+    SpvOpCapability = 17,
+    SpvOpTypeVoid = 19,
+    SpvOpTypeBool = 20,
+    SpvOpTypeInt = 21,
+    SpvOpTypeFloat = 22,
+    SpvOpTypeVector = 23,
+    SpvOpTypeMatrix = 24,
+    SpvOpTypeImage = 25,
+    SpvOpTypeSampler = 26,
+    SpvOpTypeSampledImage = 27,
+    SpvOpTypeArray = 28,
+    SpvOpTypeRuntimeArray = 29,
+    SpvOpTypeStruct = 30,
+    SpvOpTypeOpaque = 31,
+    SpvOpTypePointer = 32,
+    SpvOpTypeFunction = 33,
+    SpvOpTypeEvent = 34,
+    SpvOpTypeDeviceEvent = 35,
+    SpvOpTypeReserveId = 36,
+    SpvOpTypeQueue = 37,
+    SpvOpTypePipe = 38,
+    SpvOpTypeForwardPointer = 39,
+    SpvOpConstantTrue = 41,
+    SpvOpConstantFalse = 42,
+    SpvOpConstant = 43,
+    SpvOpConstantComposite = 44,
+    SpvOpConstantSampler = 45,
+    SpvOpConstantNull = 46,
+    SpvOpSpecConstantTrue = 48,
+    SpvOpSpecConstantFalse = 49,
+    SpvOpSpecConstant = 50,
+    SpvOpSpecConstantComposite = 51,
+    SpvOpSpecConstantOp = 52,
+    SpvOpFunction = 54,
+    SpvOpFunctionParameter = 55,
+    SpvOpFunctionEnd = 56,
+    SpvOpFunctionCall = 57,
+    SpvOpVariable = 59,
+    SpvOpImageTexelPointer = 60,
+    SpvOpLoad = 61,
+    SpvOpStore = 62,
+    SpvOpCopyMemory = 63,
+    SpvOpCopyMemorySized = 64,
+    SpvOpAccessChain = 65,
+    SpvOpInBoundsAccessChain = 66,
+    SpvOpPtrAccessChain = 67,
+    SpvOpArrayLength = 68,
+    SpvOpGenericPtrMemSemantics = 69,
+    SpvOpInBoundsPtrAccessChain = 70,
+    SpvOpDecorate = 71,
+    SpvOpMemberDecorate = 72,
+    SpvOpDecorationGroup = 73,
+    SpvOpGroupDecorate = 74,
+    SpvOpGroupMemberDecorate = 75,
+    SpvOpVectorExtractDynamic = 77,
+    SpvOpVectorInsertDynamic = 78,
+    SpvOpVectorShuffle = 79,
+    SpvOpCompositeConstruct = 80,
+    SpvOpCompositeExtract = 81,
+    SpvOpCompositeInsert = 82,
+    SpvOpCopyObject = 83,
+    SpvOpTranspose = 84,
+    SpvOpSampledImage = 86,
+    SpvOpImageSampleImplicitLod = 87,
+    SpvOpImageSampleExplicitLod = 88,
+    SpvOpImageSampleDrefImplicitLod = 89,
+    SpvOpImageSampleDrefExplicitLod = 90,
+    SpvOpImageSampleProjImplicitLod = 91,
+    SpvOpImageSampleProjExplicitLod = 92,
+    SpvOpImageSampleProjDrefImplicitLod = 93,
+    SpvOpImageSampleProjDrefExplicitLod = 94,
+    SpvOpImageFetch = 95,
+    SpvOpImageGather = 96,
+    SpvOpImageDrefGather = 97,
+    SpvOpImageRead = 98,
+    SpvOpImageWrite = 99,
+    SpvOpImage = 100,
+    SpvOpImageQueryFormat = 101,
+    SpvOpImageQueryOrder = 102,
+    SpvOpImageQuerySizeLod = 103,
+    SpvOpImageQuerySize = 104,
+    SpvOpImageQueryLod = 105,
+    SpvOpImageQueryLevels = 106,
+    SpvOpImageQuerySamples = 107,
+    SpvOpConvertFToU = 109,
+    SpvOpConvertFToS = 110,
+    SpvOpConvertSToF = 111,
+    SpvOpConvertUToF = 112,
+    SpvOpUConvert = 113,
+    SpvOpSConvert = 114,
+    SpvOpFConvert = 115,
+    SpvOpQuantizeToF16 = 116,
+    SpvOpConvertPtrToU = 117,
+    SpvOpSatConvertSToU = 118,
+    SpvOpSatConvertUToS = 119,
+    SpvOpConvertUToPtr = 120,
+    SpvOpPtrCastToGeneric = 121,
+    SpvOpGenericCastToPtr = 122,
+    SpvOpGenericCastToPtrExplicit = 123,
+    SpvOpBitcast = 124,
+    SpvOpSNegate = 126,
+    SpvOpFNegate = 127,
+    SpvOpIAdd = 128,
+    SpvOpFAdd = 129,
+    SpvOpISub = 130,
+    SpvOpFSub = 131,
+    SpvOpIMul = 132,
+    SpvOpFMul = 133,
+    SpvOpUDiv = 134,
+    SpvOpSDiv = 135,
+    SpvOpFDiv = 136,
+    SpvOpUMod = 137,
+    SpvOpSRem = 138,
+    SpvOpSMod = 139,
+    SpvOpFRem = 140,
+    SpvOpFMod = 141,
+    SpvOpVectorTimesScalar = 142,
+    SpvOpMatrixTimesScalar = 143,
+    SpvOpVectorTimesMatrix = 144,
+    SpvOpMatrixTimesVector = 145,
+    SpvOpMatrixTimesMatrix = 146,
+    SpvOpOuterProduct = 147,
+    SpvOpDot = 148,
+    SpvOpIAddCarry = 149,
+    SpvOpISubBorrow = 150,
+    SpvOpUMulExtended = 151,
+    SpvOpSMulExtended = 152,
+    SpvOpAny = 154,
+    SpvOpAll = 155,
+    SpvOpIsNan = 156,
+    SpvOpIsInf = 157,
+    SpvOpIsFinite = 158,
+    SpvOpIsNormal = 159,
+    SpvOpSignBitSet = 160,
+    SpvOpLessOrGreater = 161,
+    SpvOpOrdered = 162,
+    SpvOpUnordered = 163,
+    SpvOpLogicalEqual = 164,
+    SpvOpLogicalNotEqual = 165,
+    SpvOpLogicalOr = 166,
+    SpvOpLogicalAnd = 167,
+    SpvOpLogicalNot = 168,
+    SpvOpSelect = 169,
+    SpvOpIEqual = 170,
+    SpvOpINotEqual = 171,
+    SpvOpUGreaterThan = 172,
+    SpvOpSGreaterThan = 173,
+    SpvOpUGreaterThanEqual = 174,
+    SpvOpSGreaterThanEqual = 175,
+    SpvOpULessThan = 176,
+    SpvOpSLessThan = 177,
+    SpvOpULessThanEqual = 178,
+    SpvOpSLessThanEqual = 179,
+    SpvOpFOrdEqual = 180,
+    SpvOpFUnordEqual = 181,
+    SpvOpFOrdNotEqual = 182,
+    SpvOpFUnordNotEqual = 183,
+    SpvOpFOrdLessThan = 184,
+    SpvOpFUnordLessThan = 185,
+    SpvOpFOrdGreaterThan = 186,
+    SpvOpFUnordGreaterThan = 187,
+    SpvOpFOrdLessThanEqual = 188,
+    SpvOpFUnordLessThanEqual = 189,
+    SpvOpFOrdGreaterThanEqual = 190,
+    SpvOpFUnordGreaterThanEqual = 191,
+    SpvOpShiftRightLogical = 194,
+    SpvOpShiftRightArithmetic = 195,
+    SpvOpShiftLeftLogical = 196,
+    SpvOpBitwiseOr = 197,
+    SpvOpBitwiseXor = 198,
+    SpvOpBitwiseAnd = 199,
+    SpvOpNot = 200,
+    SpvOpBitFieldInsert = 201,
+    SpvOpBitFieldSExtract = 202,
+    SpvOpBitFieldUExtract = 203,
+    SpvOpBitReverse = 204,
+    SpvOpBitCount = 205,
+    SpvOpDPdx = 207,
+    SpvOpDPdy = 208,
+    SpvOpFwidth = 209,
+    SpvOpDPdxFine = 210,
+    SpvOpDPdyFine = 211,
+    SpvOpFwidthFine = 212,
+    SpvOpDPdxCoarse = 213,
+    SpvOpDPdyCoarse = 214,
+    SpvOpFwidthCoarse = 215,
+    SpvOpEmitVertex = 218,
+    SpvOpEndPrimitive = 219,
+    SpvOpEmitStreamVertex = 220,
+    SpvOpEndStreamPrimitive = 221,
+    SpvOpControlBarrier = 224,
+    SpvOpMemoryBarrier = 225,
+    SpvOpAtomicLoad = 227,
+    SpvOpAtomicStore = 228,
+    SpvOpAtomicExchange = 229,
+    SpvOpAtomicCompareExchange = 230,
+    SpvOpAtomicCompareExchangeWeak = 231,
+    SpvOpAtomicIIncrement = 232,
+    SpvOpAtomicIDecrement = 233,
+    SpvOpAtomicIAdd = 234,
+    SpvOpAtomicISub = 235,
+    SpvOpAtomicSMin = 236,
+    SpvOpAtomicUMin = 237,
+    SpvOpAtomicSMax = 238,
+    SpvOpAtomicUMax = 239,
+    SpvOpAtomicAnd = 240,
+    SpvOpAtomicOr = 241,
+    SpvOpAtomicXor = 242,
+    SpvOpPhi = 245,
+    SpvOpLoopMerge = 246,
+    SpvOpSelectionMerge = 247,
+    SpvOpLabel = 248,
+    SpvOpBranch = 249,
+    SpvOpBranchConditional = 250,
+    SpvOpSwitch = 251,
+    SpvOpKill = 252,
+    SpvOpReturn = 253,
+    SpvOpReturnValue = 254,
+    SpvOpUnreachable = 255,
+    SpvOpLifetimeStart = 256,
+    SpvOpLifetimeStop = 257,
+    SpvOpGroupAsyncCopy = 259,
+    SpvOpGroupWaitEvents = 260,
+    SpvOpGroupAll = 261,
+    SpvOpGroupAny = 262,
+    SpvOpGroupBroadcast = 263,
+    SpvOpGroupIAdd = 264,
+    SpvOpGroupFAdd = 265,
+    SpvOpGroupFMin = 266,
+    SpvOpGroupUMin = 267,
+    SpvOpGroupSMin = 268,
+    SpvOpGroupFMax = 269,
+    SpvOpGroupUMax = 270,
+    SpvOpGroupSMax = 271,
+    SpvOpReadPipe = 274,
+    SpvOpWritePipe = 275,
+    SpvOpReservedReadPipe = 276,
+    SpvOpReservedWritePipe = 277,
+    SpvOpReserveReadPipePackets = 278,
+    SpvOpReserveWritePipePackets = 279,
+    SpvOpCommitReadPipe = 280,
+    SpvOpCommitWritePipe = 281,
+    SpvOpIsValidReserveId = 282,
+    SpvOpGetNumPipePackets = 283,
+    SpvOpGetMaxPipePackets = 284,
+    SpvOpGroupReserveReadPipePackets = 285,
+    SpvOpGroupReserveWritePipePackets = 286,
+    SpvOpGroupCommitReadPipe = 287,
+    SpvOpGroupCommitWritePipe = 288,
+    SpvOpEnqueueMarker = 291,
+    SpvOpEnqueueKernel = 292,
+    SpvOpGetKernelNDrangeSubGroupCount = 293,
+    SpvOpGetKernelNDrangeMaxSubGroupSize = 294,
+    SpvOpGetKernelWorkGroupSize = 295,
+    SpvOpGetKernelPreferredWorkGroupSizeMultiple = 296,
+    SpvOpRetainEvent = 297,
+    SpvOpReleaseEvent = 298,
+    SpvOpCreateUserEvent = 299,
+    SpvOpIsValidEvent = 300,
+    SpvOpSetUserEventStatus = 301,
+    SpvOpCaptureEventProfilingInfo = 302,
+    SpvOpGetDefaultQueue = 303,
+    SpvOpBuildNDRange = 304,
+    SpvOpImageSparseSampleImplicitLod = 305,
+    SpvOpImageSparseSampleExplicitLod = 306,
+    SpvOpImageSparseSampleDrefImplicitLod = 307,
+    SpvOpImageSparseSampleDrefExplicitLod = 308,
+    SpvOpImageSparseSampleProjImplicitLod = 309,
+    SpvOpImageSparseSampleProjExplicitLod = 310,
+    SpvOpImageSparseSampleProjDrefImplicitLod = 311,
+    SpvOpImageSparseSampleProjDrefExplicitLod = 312,
+    SpvOpImageSparseFetch = 313,
+    SpvOpImageSparseGather = 314,
+    SpvOpImageSparseDrefGather = 315,
+    SpvOpImageSparseTexelsResident = 316,
+    SpvOpNoLine = 317,
+    SpvOpAtomicFlagTestAndSet = 318,
+    SpvOpAtomicFlagClear = 319,
+} SpvOp;
+
+#endif  // #ifndef spirv_H
+
diff --git a/src/compiler/nir/spirv/spirv_to_nir.c b/src/compiler/nir/spirv/spirv_to_nir.c
new file mode 100644
index 00000000000..c002457ce12
--- /dev/null
+++ b/src/compiler/nir/spirv/spirv_to_nir.c
@@ -0,0 +1,2654 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "vtn_private.h"
+#include "nir/nir_vla.h"
+#include "nir/nir_control_flow.h"
+#include "nir/nir_constant_expressions.h"
+
+static struct vtn_ssa_value *
+vtn_undef_ssa_value(struct vtn_builder *b, const struct glsl_type *type)
+{
+   struct vtn_ssa_value *val = rzalloc(b, struct vtn_ssa_value);
+   val->type = type;
+
+   if (glsl_type_is_vector_or_scalar(type)) {
+      unsigned num_components = glsl_get_vector_elements(val->type);
+      nir_ssa_undef_instr *undef =
+         nir_ssa_undef_instr_create(b->shader, num_components);
+
+      nir_instr_insert_before_cf_list(&b->impl->body, &undef->instr);
+      val->def = &undef->def;
+   } else {
+      unsigned elems = glsl_get_length(val->type);
+      val->elems = ralloc_array(b, struct vtn_ssa_value *, elems);
+      if (glsl_type_is_matrix(type)) {
+         const struct glsl_type *elem_type =
+            glsl_vector_type(glsl_get_base_type(type),
+                             glsl_get_vector_elements(type));
+
+         for (unsigned i = 0; i < elems; i++)
+            val->elems[i] = vtn_undef_ssa_value(b, elem_type);
+      } else if (glsl_type_is_array(type)) {
+         const struct glsl_type *elem_type = glsl_get_array_element(type);
+         for (unsigned i = 0; i < elems; i++)
+            val->elems[i] = vtn_undef_ssa_value(b, elem_type);
+      } else {
+         for (unsigned i = 0; i < elems; i++) {
+            const struct glsl_type *elem_type = glsl_get_struct_field(type, i);
+            val->elems[i] = vtn_undef_ssa_value(b, elem_type);
+         }
+      }
+   }
+
+   return val;
+}
+
+static struct vtn_ssa_value *
+vtn_const_ssa_value(struct vtn_builder *b, nir_constant *constant,
+                    const struct glsl_type *type)
+{
+   struct hash_entry *entry = _mesa_hash_table_search(b->const_table, constant);
+
+   if (entry)
+      return entry->data;
+
+   struct vtn_ssa_value *val = rzalloc(b, struct vtn_ssa_value);
+   val->type = type;
+
+   switch (glsl_get_base_type(type)) {
+   case GLSL_TYPE_INT:
+   case GLSL_TYPE_UINT:
+   case GLSL_TYPE_BOOL:
+   case GLSL_TYPE_FLOAT:
+   case GLSL_TYPE_DOUBLE:
+      if (glsl_type_is_vector_or_scalar(type)) {
+         unsigned num_components = glsl_get_vector_elements(val->type);
+         nir_load_const_instr *load =
+            nir_load_const_instr_create(b->shader, num_components);
+
+         for (unsigned i = 0; i < num_components; i++)
+            load->value.u[i] = constant->value.u[i];
+
+         nir_instr_insert_before_cf_list(&b->impl->body, &load->instr);
+         val->def = &load->def;
+      } else {
+         assert(glsl_type_is_matrix(type));
+         unsigned rows = glsl_get_vector_elements(val->type);
+         unsigned columns = glsl_get_matrix_columns(val->type);
+         val->elems = ralloc_array(b, struct vtn_ssa_value *, columns);
+
+         for (unsigned i = 0; i < columns; i++) {
+            struct vtn_ssa_value *col_val = rzalloc(b, struct vtn_ssa_value);
+            col_val->type = glsl_get_column_type(val->type);
+            nir_load_const_instr *load =
+               nir_load_const_instr_create(b->shader, rows);
+
+            for (unsigned j = 0; j < rows; j++)
+               load->value.u[j] = constant->value.u[rows * i + j];
+
+            nir_instr_insert_before_cf_list(&b->impl->body, &load->instr);
+            col_val->def = &load->def;
+
+            val->elems[i] = col_val;
+         }
+      }
+      break;
+
+   case GLSL_TYPE_ARRAY: {
+      unsigned elems = glsl_get_length(val->type);
+      val->elems = ralloc_array(b, struct vtn_ssa_value *, elems);
+      const struct glsl_type *elem_type = glsl_get_array_element(val->type);
+      for (unsigned i = 0; i < elems; i++)
+         val->elems[i] = vtn_const_ssa_value(b, constant->elements[i],
+                                             elem_type);
+      break;
+   }
+
+   case GLSL_TYPE_STRUCT: {
+      unsigned elems = glsl_get_length(val->type);
+      val->elems = ralloc_array(b, struct vtn_ssa_value *, elems);
+      for (unsigned i = 0; i < elems; i++) {
+         const struct glsl_type *elem_type =
+            glsl_get_struct_field(val->type, i);
+         val->elems[i] = vtn_const_ssa_value(b, constant->elements[i],
+                                             elem_type);
+      }
+      break;
+   }
+
+   default:
+      unreachable("bad constant type");
+   }
+
+   return val;
+}
+
+struct vtn_ssa_value *
+vtn_ssa_value(struct vtn_builder *b, uint32_t value_id)
+{
+   struct vtn_value *val = vtn_untyped_value(b, value_id);
+   switch (val->value_type) {
+   case vtn_value_type_undef:
+      return vtn_undef_ssa_value(b, val->type->type);
+
+   case vtn_value_type_constant:
+      return vtn_const_ssa_value(b, val->constant, val->const_type);
+
+   case vtn_value_type_ssa:
+      return val->ssa;
+
+   case vtn_value_type_access_chain:
+      /* This is needed for function parameters */
+      return vtn_variable_load(b, val->access_chain);
+
+   default:
+      unreachable("Invalid type for an SSA value");
+   }
+}
+
+static char *
+vtn_string_literal(struct vtn_builder *b, const uint32_t *words,
+                   unsigned word_count, unsigned *words_used)
+{
+   char *dup = ralloc_strndup(b, (char *)words, word_count * sizeof(*words));
+   if (words_used) {
+      /* Ammount of space taken by the string (including the null) */
+      unsigned len = strlen(dup) + 1;
+      *words_used = DIV_ROUND_UP(len, sizeof(*words));
+   }
+   return dup;
+}
+
+const uint32_t *
+vtn_foreach_instruction(struct vtn_builder *b, const uint32_t *start,
+                        const uint32_t *end, vtn_instruction_handler handler)
+{
+   b->file = NULL;
+   b->line = -1;
+   b->col = -1;
+
+   const uint32_t *w = start;
+   while (w < end) {
+      SpvOp opcode = w[0] & SpvOpCodeMask;
+      unsigned count = w[0] >> SpvWordCountShift;
+      assert(count >= 1 && w + count <= end);
+
+      switch (opcode) {
+      case SpvOpNop:
+         break; /* Do nothing */
+
+      case SpvOpLine:
+         b->file = vtn_value(b, w[1], vtn_value_type_string)->str;
+         b->line = w[2];
+         b->col = w[3];
+         break;
+
+      case SpvOpNoLine:
+         b->file = NULL;
+         b->line = -1;
+         b->col = -1;
+         break;
+
+      default:
+         if (!handler(b, opcode, w, count))
+            return w;
+         break;
+      }
+
+      w += count;
+   }
+   assert(w == end);
+   return w;
+}
+
+static void
+vtn_handle_extension(struct vtn_builder *b, SpvOp opcode,
+                     const uint32_t *w, unsigned count)
+{
+   switch (opcode) {
+   case SpvOpExtInstImport: {
+      struct vtn_value *val = vtn_push_value(b, w[1], vtn_value_type_extension);
+      if (strcmp((const char *)&w[2], "GLSL.std.450") == 0) {
+         val->ext_handler = vtn_handle_glsl450_instruction;
+      } else {
+         assert(!"Unsupported extension");
+      }
+      break;
+   }
+
+   case SpvOpExtInst: {
+      struct vtn_value *val = vtn_value(b, w[3], vtn_value_type_extension);
+      bool handled = val->ext_handler(b, w[4], w, count);
+      (void)handled;
+      assert(handled);
+      break;
+   }
+
+   default:
+      unreachable("Unhandled opcode");
+   }
+}
+
+static void
+_foreach_decoration_helper(struct vtn_builder *b,
+                           struct vtn_value *base_value,
+                           int parent_member,
+                           struct vtn_value *value,
+                           vtn_decoration_foreach_cb cb, void *data)
+{
+   for (struct vtn_decoration *dec = value->decoration; dec; dec = dec->next) {
+      int member;
+      if (dec->scope == VTN_DEC_DECORATION) {
+         member = parent_member;
+      } else if (dec->scope >= VTN_DEC_STRUCT_MEMBER0) {
+         assert(parent_member == -1);
+         member = dec->scope - VTN_DEC_STRUCT_MEMBER0;
+      } else {
+         /* Not a decoration */
+         continue;
+      }
+
+      if (dec->group) {
+         assert(dec->group->value_type == vtn_value_type_decoration_group);
+         _foreach_decoration_helper(b, base_value, member, dec->group,
+                                    cb, data);
+      } else {
+         cb(b, base_value, member, dec, data);
+      }
+   }
+}
+
+/** Iterates (recursively if needed) over all of the decorations on a value
+ *
+ * This function iterates over all of the decorations applied to a given
+ * value.  If it encounters a decoration group, it recurses into the group
+ * and iterates over all of those decorations as well.
+ */
+void
+vtn_foreach_decoration(struct vtn_builder *b, struct vtn_value *value,
+                       vtn_decoration_foreach_cb cb, void *data)
+{
+   _foreach_decoration_helper(b, value, -1, value, cb, data);
+}
+
+void
+vtn_foreach_execution_mode(struct vtn_builder *b, struct vtn_value *value,
+                           vtn_execution_mode_foreach_cb cb, void *data)
+{
+   for (struct vtn_decoration *dec = value->decoration; dec; dec = dec->next) {
+      if (dec->scope != VTN_DEC_EXECUTION_MODE)
+         continue;
+
+      assert(dec->group == NULL);
+      cb(b, value, dec, data);
+   }
+}
+
+static void
+vtn_handle_decoration(struct vtn_builder *b, SpvOp opcode,
+                      const uint32_t *w, unsigned count)
+{
+   const uint32_t *w_end = w + count;
+   const uint32_t target = w[1];
+   w += 2;
+
+   switch (opcode) {
+   case SpvOpDecorationGroup:
+      vtn_push_value(b, target, vtn_value_type_decoration_group);
+      break;
+
+   case SpvOpDecorate:
+   case SpvOpMemberDecorate:
+   case SpvOpExecutionMode: {
+      struct vtn_value *val = &b->values[target];
+
+      struct vtn_decoration *dec = rzalloc(b, struct vtn_decoration);
+      switch (opcode) {
+      case SpvOpDecorate:
+         dec->scope = VTN_DEC_DECORATION;
+         break;
+      case SpvOpMemberDecorate:
+         dec->scope = VTN_DEC_STRUCT_MEMBER0 + *(w++);
+         break;
+      case SpvOpExecutionMode:
+         dec->scope = VTN_DEC_EXECUTION_MODE;
+         break;
+      default:
+         unreachable("Invalid decoration opcode");
+      }
+      dec->decoration = *(w++);
+      dec->literals = w;
+
+      /* Link into the list */
+      dec->next = val->decoration;
+      val->decoration = dec;
+      break;
+   }
+
+   case SpvOpGroupMemberDecorate:
+   case SpvOpGroupDecorate: {
+      struct vtn_value *group =
+         vtn_value(b, target, vtn_value_type_decoration_group);
+
+      for (; w < w_end; w++) {
+         struct vtn_value *val = vtn_untyped_value(b, *w);
+         struct vtn_decoration *dec = rzalloc(b, struct vtn_decoration);
+
+         dec->group = group;
+         if (opcode == SpvOpGroupDecorate) {
+            dec->scope = VTN_DEC_DECORATION;
+         } else {
+            dec->scope = VTN_DEC_STRUCT_MEMBER0 + *(w++);
+         }
+
+         /* Link into the list */
+         dec->next = val->decoration;
+         val->decoration = dec;
+      }
+      break;
+   }
+
+   default:
+      unreachable("Unhandled opcode");
+   }
+}
+
+struct member_decoration_ctx {
+   struct glsl_struct_field *fields;
+   struct vtn_type *type;
+};
+
+/* does a shallow copy of a vtn_type */
+
+static struct vtn_type *
+vtn_type_copy(struct vtn_builder *b, struct vtn_type *src)
+{
+   struct vtn_type *dest = ralloc(b, struct vtn_type);
+   dest->type = src->type;
+   dest->is_builtin = src->is_builtin;
+   if (src->is_builtin)
+      dest->builtin = src->builtin;
+
+   if (!glsl_type_is_scalar(src->type)) {
+      switch (glsl_get_base_type(src->type)) {
+      case GLSL_TYPE_INT:
+      case GLSL_TYPE_UINT:
+      case GLSL_TYPE_BOOL:
+      case GLSL_TYPE_FLOAT:
+      case GLSL_TYPE_DOUBLE:
+      case GLSL_TYPE_ARRAY:
+         dest->row_major = src->row_major;
+         dest->stride = src->stride;
+         dest->array_element = src->array_element;
+         break;
+
+      case GLSL_TYPE_STRUCT: {
+         unsigned elems = glsl_get_length(src->type);
+
+         dest->members = ralloc_array(b, struct vtn_type *, elems);
+         memcpy(dest->members, src->members, elems * sizeof(struct vtn_type *));
+
+         dest->offsets = ralloc_array(b, unsigned, elems);
+         memcpy(dest->offsets, src->offsets, elems * sizeof(unsigned));
+         break;
+      }
+
+      default:
+         unreachable("unhandled type");
+      }
+   }
+
+   return dest;
+}
+
+static struct vtn_type *
+mutable_matrix_member(struct vtn_builder *b, struct vtn_type *type, int member)
+{
+   type->members[member] = vtn_type_copy(b, type->members[member]);
+   type = type->members[member];
+
+   /* We may have an array of matrices.... Oh, joy! */
+   while (glsl_type_is_array(type->type)) {
+      type->array_element = vtn_type_copy(b, type->array_element);
+      type = type->array_element;
+   }
+
+   assert(glsl_type_is_matrix(type->type));
+
+   return type;
+}
+
+static void
+struct_member_decoration_cb(struct vtn_builder *b,
+                            struct vtn_value *val, int member,
+                            const struct vtn_decoration *dec, void *void_ctx)
+{
+   struct member_decoration_ctx *ctx = void_ctx;
+
+   if (member < 0)
+      return;
+
+   switch (dec->decoration) {
+   case SpvDecorationRelaxedPrecision:
+      break; /* FIXME: Do nothing with this for now. */
+   case SpvDecorationNoPerspective:
+      ctx->fields[member].interpolation = INTERP_QUALIFIER_NOPERSPECTIVE;
+      break;
+   case SpvDecorationFlat:
+      ctx->fields[member].interpolation = INTERP_QUALIFIER_FLAT;
+      break;
+   case SpvDecorationCentroid:
+      ctx->fields[member].centroid = true;
+      break;
+   case SpvDecorationSample:
+      ctx->fields[member].sample = true;
+      break;
+   case SpvDecorationLocation:
+      ctx->fields[member].location = dec->literals[0];
+      break;
+   case SpvDecorationBuiltIn:
+      ctx->type->members[member] = vtn_type_copy(b, ctx->type->members[member]);
+      ctx->type->members[member]->is_builtin = true;
+      ctx->type->members[member]->builtin = dec->literals[0];
+      ctx->type->builtin_block = true;
+      break;
+   case SpvDecorationOffset:
+      ctx->type->offsets[member] = dec->literals[0];
+      break;
+   case SpvDecorationMatrixStride:
+      mutable_matrix_member(b, ctx->type, member)->stride = dec->literals[0];
+      break;
+   case SpvDecorationColMajor:
+      break; /* Nothing to do here.  Column-major is the default. */
+   case SpvDecorationRowMajor:
+      mutable_matrix_member(b, ctx->type, member)->row_major = true;
+      break;
+   default:
+      unreachable("Unhandled member decoration");
+   }
+}
+
+static void
+type_decoration_cb(struct vtn_builder *b,
+                   struct vtn_value *val, int member,
+                    const struct vtn_decoration *dec, void *ctx)
+{
+   struct vtn_type *type = val->type;
+
+   if (member != -1)
+      return;
+
+   switch (dec->decoration) {
+   case SpvDecorationArrayStride:
+      type->stride = dec->literals[0];
+      break;
+   case SpvDecorationBlock:
+      type->block = true;
+      break;
+   case SpvDecorationBufferBlock:
+      type->buffer_block = true;
+      break;
+   case SpvDecorationGLSLShared:
+   case SpvDecorationGLSLPacked:
+      /* Ignore these, since we get explicit offsets anyways */
+      break;
+
+   case SpvDecorationStream:
+      assert(dec->literals[0] == 0);
+      break;
+
+   default:
+      unreachable("Unhandled type decoration");
+   }
+}
+
+static unsigned
+translate_image_format(SpvImageFormat format)
+{
+   switch (format) {
+   case SpvImageFormatUnknown:      return 0;      /* GL_NONE */
+   case SpvImageFormatRgba32f:      return 0x8814; /* GL_RGBA32F */
+   case SpvImageFormatRgba16f:      return 0x881A; /* GL_RGBA16F */
+   case SpvImageFormatR32f:         return 0x822E; /* GL_R32F */
+   case SpvImageFormatRgba8:        return 0x8058; /* GL_RGBA8 */
+   case SpvImageFormatRgba8Snorm:   return 0x8F97; /* GL_RGBA8_SNORM */
+   case SpvImageFormatRg32f:        return 0x8230; /* GL_RG32F */
+   case SpvImageFormatRg16f:        return 0x822F; /* GL_RG16F */
+   case SpvImageFormatR11fG11fB10f: return 0x8C3A; /* GL_R11F_G11F_B10F */
+   case SpvImageFormatR16f:         return 0x822D; /* GL_R16F */
+   case SpvImageFormatRgba16:       return 0x805B; /* GL_RGBA16 */
+   case SpvImageFormatRgb10A2:      return 0x8059; /* GL_RGB10_A2 */
+   case SpvImageFormatRg16:         return 0x822C; /* GL_RG16 */
+   case SpvImageFormatRg8:          return 0x822B; /* GL_RG8 */
+   case SpvImageFormatR16:          return 0x822A; /* GL_R16 */
+   case SpvImageFormatR8:           return 0x8229; /* GL_R8 */
+   case SpvImageFormatRgba16Snorm:  return 0x8F9B; /* GL_RGBA16_SNORM */
+   case SpvImageFormatRg16Snorm:    return 0x8F99; /* GL_RG16_SNORM */
+   case SpvImageFormatRg8Snorm:     return 0x8F95; /* GL_RG8_SNORM */
+   case SpvImageFormatR16Snorm:     return 0x8F98; /* GL_R16_SNORM */
+   case SpvImageFormatR8Snorm:      return 0x8F94; /* GL_R8_SNORM */
+   case SpvImageFormatRgba32i:      return 0x8D82; /* GL_RGBA32I */
+   case SpvImageFormatRgba16i:      return 0x8D88; /* GL_RGBA16I */
+   case SpvImageFormatRgba8i:       return 0x8D8E; /* GL_RGBA8I */
+   case SpvImageFormatR32i:         return 0x8235; /* GL_R32I */
+   case SpvImageFormatRg32i:        return 0x823B; /* GL_RG32I */
+   case SpvImageFormatRg16i:        return 0x8239; /* GL_RG16I */
+   case SpvImageFormatRg8i:         return 0x8237; /* GL_RG8I */
+   case SpvImageFormatR16i:         return 0x8233; /* GL_R16I */
+   case SpvImageFormatR8i:          return 0x8231; /* GL_R8I */
+   case SpvImageFormatRgba32ui:     return 0x8D70; /* GL_RGBA32UI */
+   case SpvImageFormatRgba16ui:     return 0x8D76; /* GL_RGBA16UI */
+   case SpvImageFormatRgba8ui:      return 0x8D7C; /* GL_RGBA8UI */
+   case SpvImageFormatR32ui:        return 0x8236; /* GL_R32UI */
+   case SpvImageFormatRgb10a2ui:    return 0x906F; /* GL_RGB10_A2UI */
+   case SpvImageFormatRg32ui:       return 0x823C; /* GL_RG32UI */
+   case SpvImageFormatRg16ui:       return 0x823A; /* GL_RG16UI */
+   case SpvImageFormatRg8ui:        return 0x8238; /* GL_RG8UI */
+   case SpvImageFormatR16ui:        return 0x823A; /* GL_RG16UI */
+   case SpvImageFormatR8ui:         return 0x8232; /* GL_R8UI */
+   default:
+      assert(!"Invalid image format");
+      return 0;
+   }
+}
+
+static void
+vtn_handle_type(struct vtn_builder *b, SpvOp opcode,
+                const uint32_t *w, unsigned count)
+{
+   struct vtn_value *val = vtn_push_value(b, w[1], vtn_value_type_type);
+
+   val->type = rzalloc(b, struct vtn_type);
+   val->type->is_builtin = false;
+   val->type->val = val;
+
+   switch (opcode) {
+   case SpvOpTypeVoid:
+      val->type->type = glsl_void_type();
+      break;
+   case SpvOpTypeBool:
+      val->type->type = glsl_bool_type();
+      break;
+   case SpvOpTypeInt:
+      val->type->type = glsl_int_type();
+      break;
+   case SpvOpTypeFloat:
+      val->type->type = glsl_float_type();
+      break;
+
+   case SpvOpTypeVector: {
+      struct vtn_type *base = vtn_value(b, w[2], vtn_value_type_type)->type;
+      unsigned elems = w[3];
+
+      assert(glsl_type_is_scalar(base->type));
+      val->type->type = glsl_vector_type(glsl_get_base_type(base->type), elems);
+
+      /* Vectors implicitly have sizeof(base_type) stride.  For now, this
+       * is always 4 bytes.  This will have to change if we want to start
+       * supporting doubles or half-floats.
+       */
+      val->type->stride = 4;
+      val->type->array_element = base;
+      break;
+   }
+
+   case SpvOpTypeMatrix: {
+      struct vtn_type *base = vtn_value(b, w[2], vtn_value_type_type)->type;
+      unsigned columns = w[3];
+
+      assert(glsl_type_is_vector(base->type));
+      val->type->type = glsl_matrix_type(glsl_get_base_type(base->type),
+                                         glsl_get_vector_elements(base->type),
+                                         columns);
+      assert(!glsl_type_is_error(val->type->type));
+      val->type->array_element = base;
+      val->type->row_major = false;
+      val->type->stride = 0;
+      break;
+   }
+
+   case SpvOpTypeRuntimeArray:
+   case SpvOpTypeArray: {
+      struct vtn_type *array_element =
+         vtn_value(b, w[2], vtn_value_type_type)->type;
+
+      unsigned length;
+      if (opcode == SpvOpTypeRuntimeArray) {
+         /* A length of 0 is used to denote unsized arrays */
+         length = 0;
+      } else {
+         length =
+            vtn_value(b, w[3], vtn_value_type_constant)->constant->value.u[0];
+      }
+
+      val->type->type = glsl_array_type(array_element->type, length);
+      val->type->array_element = array_element;
+      val->type->stride = 0;
+      break;
+   }
+
+   case SpvOpTypeStruct: {
+      unsigned num_fields = count - 2;
+      val->type->members = ralloc_array(b, struct vtn_type *, num_fields);
+      val->type->offsets = ralloc_array(b, unsigned, num_fields);
+
+      NIR_VLA(struct glsl_struct_field, fields, count);
+      for (unsigned i = 0; i < num_fields; i++) {
+         val->type->members[i] =
+            vtn_value(b, w[i + 2], vtn_value_type_type)->type;
+         fields[i] = (struct glsl_struct_field) {
+            .type = val->type->members[i]->type,
+            .name = ralloc_asprintf(b, "field%d", i),
+            .location = -1,
+         };
+      }
+
+      struct member_decoration_ctx ctx = {
+         .fields = fields,
+         .type = val->type
+      };
+
+      vtn_foreach_decoration(b, val, struct_member_decoration_cb, &ctx);
+
+      const char *name = val->name ? val->name : "struct";
+
+      val->type->type = glsl_struct_type(fields, num_fields, name);
+      break;
+   }
+
+   case SpvOpTypeFunction: {
+      const struct glsl_type *return_type =
+         vtn_value(b, w[2], vtn_value_type_type)->type->type;
+      NIR_VLA(struct glsl_function_param, params, count - 3);
+      for (unsigned i = 0; i < count - 3; i++) {
+         params[i].type = vtn_value(b, w[i + 3], vtn_value_type_type)->type->type;
+
+         /* FIXME: */
+         params[i].in = true;
+         params[i].out = true;
+      }
+      val->type->type = glsl_function_type(return_type, params, count - 3);
+      break;
+   }
+
+   case SpvOpTypePointer:
+      /* FIXME:  For now, we'll just do the really lame thing and return
+       * the same type.  The validator should ensure that the proper number
+       * of dereferences happen
+       */
+      val->type = vtn_value(b, w[3], vtn_value_type_type)->type;
+      break;
+
+   case SpvOpTypeImage: {
+      const struct glsl_type *sampled_type =
+         vtn_value(b, w[2], vtn_value_type_type)->type->type;
+
+      assert(glsl_type_is_vector_or_scalar(sampled_type));
+
+      enum glsl_sampler_dim dim;
+      switch ((SpvDim)w[3]) {
+      case SpvDim1D:       dim = GLSL_SAMPLER_DIM_1D;    break;
+      case SpvDim2D:       dim = GLSL_SAMPLER_DIM_2D;    break;
+      case SpvDim3D:       dim = GLSL_SAMPLER_DIM_3D;    break;
+      case SpvDimCube:     dim = GLSL_SAMPLER_DIM_CUBE;  break;
+      case SpvDimRect:     dim = GLSL_SAMPLER_DIM_RECT;  break;
+      case SpvDimBuffer:   dim = GLSL_SAMPLER_DIM_BUF;   break;
+      default:
+         unreachable("Invalid SPIR-V Sampler dimension");
+      }
+
+      bool is_shadow = w[4];
+      bool is_array = w[5];
+      bool multisampled = w[6];
+      unsigned sampled = w[7];
+      SpvImageFormat format = w[8];
+
+      if (count > 9)
+         val->type->access_qualifier = w[9];
+      else
+         val->type->access_qualifier = SpvAccessQualifierReadWrite;
+
+      assert(!multisampled && "FIXME: Handl multi-sampled textures");
+
+      val->type->image_format = translate_image_format(format);
+
+      if (sampled == 1) {
+         val->type->type = glsl_sampler_type(dim, is_shadow, is_array,
+                                             glsl_get_base_type(sampled_type));
+      } else if (sampled == 2) {
+         assert(format);
+         assert(!is_shadow);
+         val->type->type = glsl_image_type(dim, is_array,
+                                           glsl_get_base_type(sampled_type));
+      } else {
+         assert(!"We need to know if the image will be sampled");
+      }
+      break;
+   }
+
+   case SpvOpTypeSampledImage:
+      val->type = vtn_value(b, w[2], vtn_value_type_type)->type;
+      break;
+
+   case SpvOpTypeSampler:
+      /* The actual sampler type here doesn't really matter.  It gets
+       * thrown away the moment you combine it with an image.  What really
+       * matters is that it's a sampler type as opposed to an integer type
+       * so the backend knows what to do.
+       *
+       * TODO: Eventually we should consider adding a "bare sampler" type
+       * to glsl_types.
+       */
+      val->type->type = glsl_sampler_type(GLSL_SAMPLER_DIM_2D, false, false,
+                                          GLSL_TYPE_FLOAT);
+      break;
+
+   case SpvOpTypeOpaque:
+   case SpvOpTypeEvent:
+   case SpvOpTypeDeviceEvent:
+   case SpvOpTypeReserveId:
+   case SpvOpTypeQueue:
+   case SpvOpTypePipe:
+   default:
+      unreachable("Unhandled opcode");
+   }
+
+   vtn_foreach_decoration(b, val, type_decoration_cb, NULL);
+}
+
+static nir_constant *
+vtn_null_constant(struct vtn_builder *b, const struct glsl_type *type)
+{
+   nir_constant *c = rzalloc(b, nir_constant);
+
+   switch (glsl_get_base_type(type)) {
+   case GLSL_TYPE_INT:
+   case GLSL_TYPE_UINT:
+   case GLSL_TYPE_BOOL:
+   case GLSL_TYPE_FLOAT:
+   case GLSL_TYPE_DOUBLE:
+      /* Nothing to do here.  It's already initialized to zero */
+      break;
+
+   case GLSL_TYPE_ARRAY:
+      assert(glsl_get_length(type) > 0);
+      c->num_elements = glsl_get_length(type);
+      c->elements = ralloc_array(b, nir_constant *, c->num_elements);
+
+      c->elements[0] = vtn_null_constant(b, glsl_get_array_element(type));
+      for (unsigned i = 1; i < c->num_elements; i++)
+         c->elements[i] = c->elements[0];
+      break;
+
+   case GLSL_TYPE_STRUCT:
+      c->num_elements = glsl_get_length(type);
+      c->elements = ralloc_array(b, nir_constant *, c->num_elements);
+
+      for (unsigned i = 0; i < c->num_elements; i++) {
+         c->elements[i] = vtn_null_constant(b, glsl_get_struct_field(type, i));
+      }
+      break;
+
+   default:
+      unreachable("Invalid type for null constant");
+   }
+
+   return c;
+}
+
+static void
+spec_constant_deocoration_cb(struct vtn_builder *b, struct vtn_value *v,
+                             int member, const struct vtn_decoration *dec,
+                             void *data)
+{
+   assert(member == -1);
+   if (dec->decoration != SpvDecorationSpecId)
+      return;
+
+   uint32_t *const_value = data;
+
+   for (unsigned i = 0; i < b->num_specializations; i++) {
+      if (b->specializations[i].id == dec->literals[0]) {
+         *const_value = b->specializations[i].data;
+         return;
+      }
+   }
+}
+
+static uint32_t
+get_specialization(struct vtn_builder *b, struct vtn_value *val,
+                   uint32_t const_value)
+{
+   vtn_foreach_decoration(b, val, spec_constant_deocoration_cb, &const_value);
+   return const_value;
+}
+
+static void
+vtn_handle_constant(struct vtn_builder *b, SpvOp opcode,
+                    const uint32_t *w, unsigned count)
+{
+   struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_constant);
+   val->const_type = vtn_value(b, w[1], vtn_value_type_type)->type->type;
+   val->constant = rzalloc(b, nir_constant);
+   switch (opcode) {
+   case SpvOpConstantTrue:
+      assert(val->const_type == glsl_bool_type());
+      val->constant->value.u[0] = NIR_TRUE;
+      break;
+   case SpvOpConstantFalse:
+      assert(val->const_type == glsl_bool_type());
+      val->constant->value.u[0] = NIR_FALSE;
+      break;
+
+   case SpvOpSpecConstantTrue:
+   case SpvOpSpecConstantFalse: {
+      assert(val->const_type == glsl_bool_type());
+      uint32_t int_val =
+         get_specialization(b, val, (opcode == SpvOpSpecConstantTrue));
+      val->constant->value.u[0] = int_val ? NIR_TRUE : NIR_FALSE;
+      break;
+   }
+
+   case SpvOpConstant:
+      assert(glsl_type_is_scalar(val->const_type));
+      val->constant->value.u[0] = w[3];
+      break;
+   case SpvOpSpecConstant:
+      assert(glsl_type_is_scalar(val->const_type));
+      val->constant->value.u[0] = get_specialization(b, val, w[3]);
+      break;
+   case SpvOpSpecConstantComposite:
+   case SpvOpConstantComposite: {
+      unsigned elem_count = count - 3;
+      nir_constant **elems = ralloc_array(b, nir_constant *, elem_count);
+      for (unsigned i = 0; i < elem_count; i++)
+         elems[i] = vtn_value(b, w[i + 3], vtn_value_type_constant)->constant;
+
+      switch (glsl_get_base_type(val->const_type)) {
+      case GLSL_TYPE_UINT:
+      case GLSL_TYPE_INT:
+      case GLSL_TYPE_FLOAT:
+      case GLSL_TYPE_BOOL:
+         if (glsl_type_is_matrix(val->const_type)) {
+            unsigned rows = glsl_get_vector_elements(val->const_type);
+            assert(glsl_get_matrix_columns(val->const_type) == elem_count);
+            for (unsigned i = 0; i < elem_count; i++)
+               for (unsigned j = 0; j < rows; j++)
+                  val->constant->value.u[rows * i + j] = elems[i]->value.u[j];
+         } else {
+            assert(glsl_type_is_vector(val->const_type));
+            assert(glsl_get_vector_elements(val->const_type) == elem_count);
+            for (unsigned i = 0; i < elem_count; i++)
+               val->constant->value.u[i] = elems[i]->value.u[0];
+         }
+         ralloc_free(elems);
+         break;
+
+      case GLSL_TYPE_STRUCT:
+      case GLSL_TYPE_ARRAY:
+         ralloc_steal(val->constant, elems);
+         val->constant->num_elements = elem_count;
+         val->constant->elements = elems;
+         break;
+
+      default:
+         unreachable("Unsupported type for constants");
+      }
+      break;
+   }
+
+   case SpvOpSpecConstantOp: {
+      SpvOp opcode = get_specialization(b, val, w[3]);
+      switch (opcode) {
+      case SpvOpVectorShuffle: {
+         struct vtn_value *v0 = vtn_value(b, w[4], vtn_value_type_constant);
+         struct vtn_value *v1 = vtn_value(b, w[5], vtn_value_type_constant);
+         unsigned len0 = glsl_get_vector_elements(v0->const_type);
+         unsigned len1 = glsl_get_vector_elements(v1->const_type);
+
+         uint32_t u[8];
+         for (unsigned i = 0; i < len0; i++)
+            u[i] = v0->constant->value.u[i];
+         for (unsigned i = 0; i < len1; i++)
+            u[len0 + i] = v1->constant->value.u[i];
+
+         for (unsigned i = 0; i < count - 6; i++) {
+            uint32_t comp = w[i + 6];
+            if (comp == (uint32_t)-1) {
+               val->constant->value.u[i] = 0xdeadbeef;
+            } else {
+               val->constant->value.u[i] = u[comp];
+            }
+         }
+         return;
+      }
+
+      case SpvOpCompositeExtract:
+      case SpvOpCompositeInsert: {
+         struct vtn_value *comp;
+         unsigned deref_start;
+         struct nir_constant **c;
+         if (opcode == SpvOpCompositeExtract) {
+            comp = vtn_value(b, w[4], vtn_value_type_constant);
+            deref_start = 5;
+            c = &comp->constant;
+         } else {
+            comp = vtn_value(b, w[5], vtn_value_type_constant);
+            deref_start = 6;
+            val->constant = nir_constant_clone(comp->constant,
+                                               (nir_variable *)b);
+            c = &val->constant;
+         }
+
+         int elem = -1;
+         const struct glsl_type *type = comp->const_type;
+         for (unsigned i = deref_start; i < count; i++) {
+            switch (glsl_get_base_type(type)) {
+            case GLSL_TYPE_UINT:
+            case GLSL_TYPE_INT:
+            case GLSL_TYPE_FLOAT:
+            case GLSL_TYPE_BOOL:
+               /* If we hit this granularity, we're picking off an element */
+               if (elem < 0)
+                  elem = 0;
+
+               if (glsl_type_is_matrix(type)) {
+                  elem += w[i] * glsl_get_vector_elements(type);
+                  type = glsl_get_column_type(type);
+               } else {
+                  assert(glsl_type_is_vector(type));
+                  elem += w[i];
+                  type = glsl_scalar_type(glsl_get_base_type(type));
+               }
+               continue;
+
+            case GLSL_TYPE_ARRAY:
+               c = &(*c)->elements[w[i]];
+               type = glsl_get_array_element(type);
+               continue;
+
+            case GLSL_TYPE_STRUCT:
+               c = &(*c)->elements[w[i]];
+               type = glsl_get_struct_field(type, w[i]);
+               continue;
+
+            default:
+               unreachable("Invalid constant type");
+            }
+         }
+
+         if (opcode == SpvOpCompositeExtract) {
+            if (elem == -1) {
+               val->constant = *c;
+            } else {
+               unsigned num_components = glsl_get_vector_elements(type);
+               for (unsigned i = 0; i < num_components; i++)
+                  val->constant->value.u[i] = (*c)->value.u[elem + i];
+            }
+         } else {
+            struct vtn_value *insert =
+               vtn_value(b, w[4], vtn_value_type_constant);
+            assert(insert->const_type == type);
+            if (elem == -1) {
+               *c = insert->constant;
+            } else {
+               unsigned num_components = glsl_get_vector_elements(type);
+               for (unsigned i = 0; i < num_components; i++)
+                  (*c)->value.u[elem + i] = insert->constant->value.u[i];
+            }
+         }
+         return;
+      }
+
+      default: {
+         bool swap;
+         nir_op op = vtn_nir_alu_op_for_spirv_opcode(opcode, &swap);
+
+         unsigned num_components = glsl_get_vector_elements(val->const_type);
+
+         nir_const_value src[3];
+         assert(count <= 7);
+         for (unsigned i = 0; i < count - 4; i++) {
+            nir_constant *c =
+               vtn_value(b, w[4 + i], vtn_value_type_constant)->constant;
+
+            unsigned j = swap ? 1 - i : i;
+            for (unsigned k = 0; k < num_components; k++)
+               src[j].u[k] = c->value.u[k];
+         }
+
+         nir_const_value res = nir_eval_const_opcode(op, num_components, src);
+
+         for (unsigned k = 0; k < num_components; k++)
+            val->constant->value.u[k] = res.u[k];
+
+         return;
+      } /* default */
+      }
+   }
+
+   case SpvOpConstantNull:
+      val->constant = vtn_null_constant(b, val->const_type);
+      break;
+
+   case SpvOpConstantSampler:
+      assert(!"OpConstantSampler requires Kernel Capability");
+      break;
+
+   default:
+      unreachable("Unhandled opcode");
+   }
+}
+
+static void
+vtn_handle_function_call(struct vtn_builder *b, SpvOp opcode,
+                         const uint32_t *w, unsigned count)
+{
+   struct nir_function *callee =
+      vtn_value(b, w[3], vtn_value_type_function)->func->impl->function;
+
+   nir_call_instr *call = nir_call_instr_create(b->nb.shader, callee);
+   for (unsigned i = 0; i < call->num_params; i++) {
+      unsigned arg_id = w[4 + i];
+      struct vtn_value *arg = vtn_untyped_value(b, arg_id);
+      if (arg->value_type == vtn_value_type_access_chain) {
+         nir_deref_var *d = vtn_access_chain_to_deref(b, arg->access_chain);
+         call->params[i] = nir_deref_as_var(nir_copy_deref(call, &d->deref));
+      } else {
+         struct vtn_ssa_value *arg_ssa = vtn_ssa_value(b, arg_id);
+
+         /* Make a temporary to store the argument in */
+         nir_variable *tmp =
+            nir_local_variable_create(b->impl, arg_ssa->type, "arg_tmp");
+         call->params[i] = nir_deref_var_create(call, tmp);
+
+         vtn_local_store(b, arg_ssa, call->params[i]);
+      }
+   }
+
+   nir_variable *out_tmp = NULL;
+   if (!glsl_type_is_void(callee->return_type)) {
+      out_tmp = nir_local_variable_create(b->impl, callee->return_type,
+                                          "out_tmp");
+      call->return_deref = nir_deref_var_create(call, out_tmp);
+   }
+
+   nir_builder_instr_insert(&b->nb, &call->instr);
+
+   if (glsl_type_is_void(callee->return_type)) {
+      vtn_push_value(b, w[2], vtn_value_type_undef);
+   } else {
+      struct vtn_value *retval = vtn_push_value(b, w[2], vtn_value_type_ssa);
+      retval->ssa = vtn_local_load(b, call->return_deref);
+   }
+}
+
+struct vtn_ssa_value *
+vtn_create_ssa_value(struct vtn_builder *b, const struct glsl_type *type)
+{
+   struct vtn_ssa_value *val = rzalloc(b, struct vtn_ssa_value);
+   val->type = type;
+
+   if (!glsl_type_is_vector_or_scalar(type)) {
+      unsigned elems = glsl_get_length(type);
+      val->elems = ralloc_array(b, struct vtn_ssa_value *, elems);
+      for (unsigned i = 0; i < elems; i++) {
+         const struct glsl_type *child_type;
+
+         switch (glsl_get_base_type(type)) {
+         case GLSL_TYPE_INT:
+         case GLSL_TYPE_UINT:
+         case GLSL_TYPE_BOOL:
+         case GLSL_TYPE_FLOAT:
+         case GLSL_TYPE_DOUBLE:
+            child_type = glsl_get_column_type(type);
+            break;
+         case GLSL_TYPE_ARRAY:
+            child_type = glsl_get_array_element(type);
+            break;
+         case GLSL_TYPE_STRUCT:
+            child_type = glsl_get_struct_field(type, i);
+            break;
+         default:
+            unreachable("unkown base type");
+         }
+
+         val->elems[i] = vtn_create_ssa_value(b, child_type);
+      }
+   }
+
+   return val;
+}
+
+static nir_tex_src
+vtn_tex_src(struct vtn_builder *b, unsigned index, nir_tex_src_type type)
+{
+   nir_tex_src src;
+   src.src = nir_src_for_ssa(vtn_ssa_value(b, index)->def);
+   src.src_type = type;
+   return src;
+}
+
+static void
+vtn_handle_texture(struct vtn_builder *b, SpvOp opcode,
+                   const uint32_t *w, unsigned count)
+{
+   if (opcode == SpvOpSampledImage) {
+      struct vtn_value *val =
+         vtn_push_value(b, w[2], vtn_value_type_sampled_image);
+      val->sampled_image = ralloc(b, struct vtn_sampled_image);
+      val->sampled_image->image =
+         vtn_value(b, w[3], vtn_value_type_access_chain)->access_chain;
+      val->sampled_image->sampler =
+         vtn_value(b, w[4], vtn_value_type_access_chain)->access_chain;
+      return;
+   } else if (opcode == SpvOpImage) {
+      struct vtn_value *val =
+         vtn_push_value(b, w[2], vtn_value_type_access_chain);
+      struct vtn_value *src_val = vtn_untyped_value(b, w[3]);
+      if (src_val->value_type == vtn_value_type_sampled_image) {
+         val->access_chain = src_val->sampled_image->image;
+      } else {
+         assert(src_val->value_type == vtn_value_type_access_chain);
+         val->access_chain = src_val->access_chain;
+      }
+      return;
+   }
+
+   struct vtn_type *ret_type = vtn_value(b, w[1], vtn_value_type_type)->type;
+   struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_ssa);
+
+   struct vtn_sampled_image sampled;
+   struct vtn_value *sampled_val = vtn_untyped_value(b, w[3]);
+   if (sampled_val->value_type == vtn_value_type_sampled_image) {
+      sampled = *sampled_val->sampled_image;
+   } else {
+      assert(sampled_val->value_type == vtn_value_type_access_chain);
+      sampled.image = NULL;
+      sampled.sampler = sampled_val->access_chain;
+   }
+
+   nir_tex_src srcs[8]; /* 8 should be enough */
+   nir_tex_src *p = srcs;
+
+   unsigned idx = 4;
+
+   bool has_coord = false;
+   switch (opcode) {
+   case SpvOpImageSampleImplicitLod:
+   case SpvOpImageSampleExplicitLod:
+   case SpvOpImageSampleDrefImplicitLod:
+   case SpvOpImageSampleDrefExplicitLod:
+   case SpvOpImageSampleProjImplicitLod:
+   case SpvOpImageSampleProjExplicitLod:
+   case SpvOpImageSampleProjDrefImplicitLod:
+   case SpvOpImageSampleProjDrefExplicitLod:
+   case SpvOpImageFetch:
+   case SpvOpImageGather:
+   case SpvOpImageDrefGather:
+   case SpvOpImageQueryLod: {
+      /* All these types have the coordinate as their first real argument */
+      struct vtn_ssa_value *coord = vtn_ssa_value(b, w[idx++]);
+      has_coord = true;
+      p->src = nir_src_for_ssa(coord->def);
+      p->src_type = nir_tex_src_coord;
+      p++;
+      break;
+   }
+
+   default:
+      break;
+   }
+
+   /* These all have an explicit depth value as their next source */
+   switch (opcode) {
+   case SpvOpImageSampleDrefImplicitLod:
+   case SpvOpImageSampleDrefExplicitLod:
+   case SpvOpImageSampleProjDrefImplicitLod:
+   case SpvOpImageSampleProjDrefExplicitLod:
+      (*p++) = vtn_tex_src(b, w[idx++], nir_tex_src_comparitor);
+      break;
+   default:
+      break;
+   }
+
+   /* For OpImageQuerySizeLod, we always have an LOD */
+   if (opcode == SpvOpImageQuerySizeLod)
+      (*p++) = vtn_tex_src(b, w[idx++], nir_tex_src_lod);
+
+   /* Figure out the base texture operation */
+   nir_texop texop;
+   switch (opcode) {
+   case SpvOpImageSampleImplicitLod:
+   case SpvOpImageSampleDrefImplicitLod:
+   case SpvOpImageSampleProjImplicitLod:
+   case SpvOpImageSampleProjDrefImplicitLod:
+      texop = nir_texop_tex;
+      break;
+
+   case SpvOpImageSampleExplicitLod:
+   case SpvOpImageSampleDrefExplicitLod:
+   case SpvOpImageSampleProjExplicitLod:
+   case SpvOpImageSampleProjDrefExplicitLod:
+      texop = nir_texop_txl;
+      break;
+
+   case SpvOpImageFetch:
+      texop = nir_texop_txf;
+      break;
+
+   case SpvOpImageGather:
+   case SpvOpImageDrefGather:
+      texop = nir_texop_tg4;
+      break;
+
+   case SpvOpImageQuerySizeLod:
+   case SpvOpImageQuerySize:
+      texop = nir_texop_txs;
+      break;
+
+   case SpvOpImageQueryLod:
+      texop = nir_texop_lod;
+      break;
+
+   case SpvOpImageQueryLevels:
+      texop = nir_texop_query_levels;
+      break;
+
+   case SpvOpImageQuerySamples:
+   default:
+      unreachable("Unhandled opcode");
+   }
+
+   /* Now we need to handle some number of optional arguments */
+   if (idx < count) {
+      uint32_t operands = w[idx++];
+
+      if (operands & SpvImageOperandsBiasMask) {
+         assert(texop == nir_texop_tex);
+         texop = nir_texop_txb;
+         (*p++) = vtn_tex_src(b, w[idx++], nir_tex_src_bias);
+      }
+
+      if (operands & SpvImageOperandsLodMask) {
+         assert(texop == nir_texop_txl || texop == nir_texop_txf ||
+                texop == nir_texop_txs);
+         (*p++) = vtn_tex_src(b, w[idx++], nir_tex_src_lod);
+      }
+
+      if (operands & SpvImageOperandsGradMask) {
+         assert(texop == nir_texop_tex);
+         texop = nir_texop_txd;
+         (*p++) = vtn_tex_src(b, w[idx++], nir_tex_src_ddx);
+         (*p++) = vtn_tex_src(b, w[idx++], nir_tex_src_ddy);
+      }
+
+      if (operands & SpvImageOperandsOffsetMask ||
+          operands & SpvImageOperandsConstOffsetMask)
+         (*p++) = vtn_tex_src(b, w[idx++], nir_tex_src_offset);
+
+      if (operands & SpvImageOperandsConstOffsetsMask)
+         assert(!"Constant offsets to texture gather not yet implemented");
+
+      if (operands & SpvImageOperandsSampleMask) {
+         assert(texop == nir_texop_txf);
+         texop = nir_texop_txf_ms;
+         (*p++) = vtn_tex_src(b, w[idx++], nir_tex_src_ms_index);
+      }
+   }
+   /* We should have now consumed exactly all of the arguments */
+   assert(idx == count);
+
+   nir_tex_instr *instr = nir_tex_instr_create(b->shader, p - srcs);
+   instr->op = texop;
+
+   memcpy(instr->src, srcs, instr->num_srcs * sizeof(*instr->src));
+
+   const struct glsl_type *image_type;
+   if (sampled.image) {
+      image_type = sampled.image->var->var->interface_type;
+   } else {
+      image_type = sampled.sampler->var->var->interface_type;
+   }
+
+   instr->sampler_dim = glsl_get_sampler_dim(image_type);
+   instr->is_array = glsl_sampler_type_is_array(image_type);
+   instr->is_shadow = glsl_sampler_type_is_shadow(image_type);
+   instr->is_new_style_shadow = instr->is_shadow;
+
+   if (has_coord) {
+      switch (instr->sampler_dim) {
+      case GLSL_SAMPLER_DIM_1D:
+      case GLSL_SAMPLER_DIM_BUF:
+         instr->coord_components = 1;
+         break;
+      case GLSL_SAMPLER_DIM_2D:
+      case GLSL_SAMPLER_DIM_RECT:
+         instr->coord_components = 2;
+         break;
+      case GLSL_SAMPLER_DIM_3D:
+      case GLSL_SAMPLER_DIM_CUBE:
+      case GLSL_SAMPLER_DIM_MS:
+         instr->coord_components = 3;
+         break;
+      default:
+         assert("Invalid sampler type");
+      }
+
+      if (instr->is_array)
+         instr->coord_components++;
+   } else {
+      instr->coord_components = 0;
+   }
+
+   switch (glsl_get_sampler_result_type(image_type)) {
+   case GLSL_TYPE_FLOAT:   instr->dest_type = nir_type_float;     break;
+   case GLSL_TYPE_INT:     instr->dest_type = nir_type_int;       break;
+   case GLSL_TYPE_UINT:    instr->dest_type = nir_type_uint;  break;
+   case GLSL_TYPE_BOOL:    instr->dest_type = nir_type_bool;      break;
+   default:
+      unreachable("Invalid base type for sampler result");
+   }
+
+   nir_deref_var *sampler = vtn_access_chain_to_deref(b, sampled.sampler);
+   instr->sampler = nir_deref_as_var(nir_copy_deref(instr, &sampler->deref));
+   if (sampled.image) {
+      nir_deref_var *image = vtn_access_chain_to_deref(b, sampled.image);
+      instr->texture = nir_deref_as_var(nir_copy_deref(instr, &image->deref));
+   } else {
+      instr->texture = NULL;
+   }
+
+   nir_ssa_dest_init(&instr->instr, &instr->dest,
+                     nir_tex_instr_dest_size(instr), NULL);
+
+   assert(glsl_get_vector_elements(ret_type->type) ==
+          nir_tex_instr_dest_size(instr));
+
+   val->ssa = vtn_create_ssa_value(b, ret_type->type);
+   val->ssa->def = &instr->dest.ssa;
+
+   nir_builder_instr_insert(&b->nb, &instr->instr);
+}
+
+static nir_ssa_def *
+get_image_coord(struct vtn_builder *b, uint32_t value)
+{
+   struct vtn_ssa_value *coord = vtn_ssa_value(b, value);
+
+   /* The image_load_store intrinsics assume a 4-dim coordinate */
+   unsigned dim = glsl_get_vector_elements(coord->type);
+   unsigned swizzle[4];
+   for (unsigned i = 0; i < 4; i++)
+      swizzle[i] = MIN2(i, dim - 1);
+
+   return nir_swizzle(&b->nb, coord->def, swizzle, 4, false);
+}
+
+static void
+vtn_handle_image(struct vtn_builder *b, SpvOp opcode,
+                 const uint32_t *w, unsigned count)
+{
+   /* Just get this one out of the way */
+   if (opcode == SpvOpImageTexelPointer) {
+      struct vtn_value *val =
+         vtn_push_value(b, w[2], vtn_value_type_image_pointer);
+      val->image = ralloc(b, struct vtn_image_pointer);
+
+      val->image->image =
+         vtn_value(b, w[3], vtn_value_type_access_chain)->access_chain;
+      val->image->coord = get_image_coord(b, w[4]);
+      val->image->sample = vtn_ssa_value(b, w[5])->def;
+      return;
+   }
+
+   struct vtn_image_pointer image;
+
+   switch (opcode) {
+   case SpvOpAtomicExchange:
+   case SpvOpAtomicCompareExchange:
+   case SpvOpAtomicCompareExchangeWeak:
+   case SpvOpAtomicIIncrement:
+   case SpvOpAtomicIDecrement:
+   case SpvOpAtomicIAdd:
+   case SpvOpAtomicISub:
+   case SpvOpAtomicSMin:
+   case SpvOpAtomicUMin:
+   case SpvOpAtomicSMax:
+   case SpvOpAtomicUMax:
+   case SpvOpAtomicAnd:
+   case SpvOpAtomicOr:
+   case SpvOpAtomicXor:
+      image = *vtn_value(b, w[3], vtn_value_type_image_pointer)->image;
+      break;
+
+   case SpvOpImageQuerySize:
+      image.image =
+         vtn_value(b, w[3], vtn_value_type_access_chain)->access_chain;
+      image.coord = NULL;
+      image.sample = NULL;
+      break;
+
+   case SpvOpImageRead:
+      image.image =
+         vtn_value(b, w[3], vtn_value_type_access_chain)->access_chain;
+      image.coord = get_image_coord(b, w[4]);
+
+      if (count > 5 && (w[5] & SpvImageOperandsSampleMask)) {
+         assert(w[5] == SpvImageOperandsSampleMask);
+         image.sample = vtn_ssa_value(b, w[6])->def;
+      } else {
+         image.sample = nir_ssa_undef(&b->nb, 1);
+      }
+      break;
+
+   case SpvOpImageWrite:
+      image.image =
+         vtn_value(b, w[1], vtn_value_type_access_chain)->access_chain;
+      image.coord = get_image_coord(b, w[2]);
+
+      /* texel = w[3] */
+
+      if (count > 4 && (w[4] & SpvImageOperandsSampleMask)) {
+         assert(w[4] == SpvImageOperandsSampleMask);
+         image.sample = vtn_ssa_value(b, w[5])->def;
+      } else {
+         image.sample = nir_ssa_undef(&b->nb, 1);
+      }
+      break;
+
+   default:
+      unreachable("Invalid image opcode");
+   }
+
+   nir_intrinsic_op op;
+   switch (opcode) {
+#define OP(S, N) case SpvOp##S: op = nir_intrinsic_image_##N; break;
+   OP(ImageQuerySize,         size)
+   OP(ImageRead,              load)
+   OP(ImageWrite,             store)
+   OP(AtomicExchange,         atomic_exchange)
+   OP(AtomicCompareExchange,  atomic_comp_swap)
+   OP(AtomicIIncrement,       atomic_add)
+   OP(AtomicIDecrement,       atomic_add)
+   OP(AtomicIAdd,             atomic_add)
+   OP(AtomicISub,             atomic_add)
+   OP(AtomicSMin,             atomic_min)
+   OP(AtomicUMin,             atomic_min)
+   OP(AtomicSMax,             atomic_max)
+   OP(AtomicUMax,             atomic_max)
+   OP(AtomicAnd,              atomic_and)
+   OP(AtomicOr,               atomic_or)
+   OP(AtomicXor,              atomic_xor)
+#undef OP
+   default:
+      unreachable("Invalid image opcode");
+   }
+
+   nir_intrinsic_instr *intrin = nir_intrinsic_instr_create(b->shader, op);
+
+   nir_deref_var *image_deref = vtn_access_chain_to_deref(b, image.image);
+   intrin->variables[0] =
+      nir_deref_as_var(nir_copy_deref(&intrin->instr, &image_deref->deref));
+
+   /* ImageQuerySize doesn't take any extra parameters */
+   if (opcode != SpvOpImageQuerySize) {
+      /* The image coordinate is always 4 components but we may not have that
+       * many.  Swizzle to compensate.
+       */
+      unsigned swiz[4];
+      for (unsigned i = 0; i < 4; i++)
+         swiz[i] = i < image.coord->num_components ? i : 0;
+      intrin->src[0] = nir_src_for_ssa(nir_swizzle(&b->nb, image.coord,
+                                                   swiz, 4, false));
+      intrin->src[1] = nir_src_for_ssa(image.sample);
+   }
+
+   switch (opcode) {
+   case SpvOpImageQuerySize:
+   case SpvOpImageRead:
+      break;
+   case SpvOpImageWrite:
+      intrin->src[2] = nir_src_for_ssa(vtn_ssa_value(b, w[3])->def);
+      break;
+   case SpvOpAtomicIIncrement:
+      intrin->src[2] = nir_src_for_ssa(nir_imm_int(&b->nb, 1));
+      break;
+   case SpvOpAtomicIDecrement:
+      intrin->src[2] = nir_src_for_ssa(nir_imm_int(&b->nb, -1));
+      break;
+
+   case SpvOpAtomicExchange:
+   case SpvOpAtomicIAdd:
+   case SpvOpAtomicSMin:
+   case SpvOpAtomicUMin:
+   case SpvOpAtomicSMax:
+   case SpvOpAtomicUMax:
+   case SpvOpAtomicAnd:
+   case SpvOpAtomicOr:
+   case SpvOpAtomicXor:
+      intrin->src[2] = nir_src_for_ssa(vtn_ssa_value(b, w[6])->def);
+      break;
+
+   case SpvOpAtomicCompareExchange:
+      intrin->src[2] = nir_src_for_ssa(vtn_ssa_value(b, w[7])->def);
+      intrin->src[3] = nir_src_for_ssa(vtn_ssa_value(b, w[6])->def);
+      break;
+
+   case SpvOpAtomicISub:
+      intrin->src[2] = nir_src_for_ssa(nir_ineg(&b->nb, vtn_ssa_value(b, w[6])->def));
+      break;
+
+   default:
+      unreachable("Invalid image opcode");
+   }
+
+   if (opcode != SpvOpImageWrite) {
+      struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_ssa);
+      struct vtn_type *type = vtn_value(b, w[1], vtn_value_type_type)->type;
+      nir_ssa_dest_init(&intrin->instr, &intrin->dest, 4, NULL);
+
+      nir_builder_instr_insert(&b->nb, &intrin->instr);
+
+      /* The image intrinsics always return 4 channels but we may not want
+       * that many.  Emit a mov to trim it down.
+       */
+      unsigned swiz[4] = {0, 1, 2, 3};
+      val->ssa = vtn_create_ssa_value(b, type->type);
+      val->ssa->def = nir_swizzle(&b->nb, &intrin->dest.ssa, swiz,
+                                  glsl_get_vector_elements(type->type), false);
+   } else {
+      nir_builder_instr_insert(&b->nb, &intrin->instr);
+   }
+}
+
+static nir_intrinsic_op
+get_ssbo_nir_atomic_op(SpvOp opcode)
+{
+   switch (opcode) {
+#define OP(S, N) case SpvOp##S: return nir_intrinsic_ssbo_##N;
+   OP(AtomicExchange,         atomic_exchange)
+   OP(AtomicCompareExchange,  atomic_comp_swap)
+   OP(AtomicIIncrement,       atomic_add)
+   OP(AtomicIDecrement,       atomic_add)
+   OP(AtomicIAdd,             atomic_add)
+   OP(AtomicISub,             atomic_add)
+   OP(AtomicSMin,             atomic_imin)
+   OP(AtomicUMin,             atomic_umin)
+   OP(AtomicSMax,             atomic_imax)
+   OP(AtomicUMax,             atomic_umax)
+   OP(AtomicAnd,              atomic_and)
+   OP(AtomicOr,               atomic_or)
+   OP(AtomicXor,              atomic_xor)
+#undef OP
+   default:
+      unreachable("Invalid SSBO atomic");
+   }
+}
+
+static nir_intrinsic_op
+get_shared_nir_atomic_op(SpvOp opcode)
+{
+   switch (opcode) {
+#define OP(S, N) case SpvOp##S: return nir_intrinsic_var_##N;
+   OP(AtomicExchange,         atomic_exchange)
+   OP(AtomicCompareExchange,  atomic_comp_swap)
+   OP(AtomicIIncrement,       atomic_add)
+   OP(AtomicIDecrement,       atomic_add)
+   OP(AtomicIAdd,             atomic_add)
+   OP(AtomicISub,             atomic_add)
+   OP(AtomicSMin,             atomic_imin)
+   OP(AtomicUMin,             atomic_umin)
+   OP(AtomicSMax,             atomic_imax)
+   OP(AtomicUMax,             atomic_umax)
+   OP(AtomicAnd,              atomic_and)
+   OP(AtomicOr,               atomic_or)
+   OP(AtomicXor,              atomic_xor)
+#undef OP
+   default:
+      unreachable("Invalid shared atomic");
+   }
+}
+
+static void
+fill_common_atomic_sources(struct vtn_builder *b, SpvOp opcode,
+                           const uint32_t *w, nir_src *src)
+{
+   switch (opcode) {
+   case SpvOpAtomicIIncrement:
+      src[0] = nir_src_for_ssa(nir_imm_int(&b->nb, 1));
+      break;
+
+   case SpvOpAtomicIDecrement:
+      src[0] = nir_src_for_ssa(nir_imm_int(&b->nb, -1));
+      break;
+
+   case SpvOpAtomicISub:
+      src[0] =
+         nir_src_for_ssa(nir_ineg(&b->nb, vtn_ssa_value(b, w[6])->def));
+      break;
+
+   case SpvOpAtomicCompareExchange:
+      src[0] = nir_src_for_ssa(vtn_ssa_value(b, w[7])->def);
+      src[1] = nir_src_for_ssa(vtn_ssa_value(b, w[8])->def);
+      break;
+      /* Fall through */
+
+   case SpvOpAtomicExchange:
+   case SpvOpAtomicIAdd:
+   case SpvOpAtomicSMin:
+   case SpvOpAtomicUMin:
+   case SpvOpAtomicSMax:
+   case SpvOpAtomicUMax:
+   case SpvOpAtomicAnd:
+   case SpvOpAtomicOr:
+   case SpvOpAtomicXor:
+      src[0] = nir_src_for_ssa(vtn_ssa_value(b, w[6])->def);
+      break;
+
+   default:
+      unreachable("Invalid SPIR-V atomic");
+   }
+}
+
+static void
+vtn_handle_ssbo_or_shared_atomic(struct vtn_builder *b, SpvOp opcode,
+                                 const uint32_t *w, unsigned count)
+{
+   struct vtn_access_chain *chain =
+      vtn_value(b, w[3], vtn_value_type_access_chain)->access_chain;
+   nir_intrinsic_instr *atomic;
+
+   /*
+   SpvScope scope = w[4];
+   SpvMemorySemanticsMask semantics = w[5];
+   */
+
+   if (chain->var->mode == vtn_variable_mode_workgroup) {
+      nir_deref *deref = &vtn_access_chain_to_deref(b, chain)->deref;
+      nir_intrinsic_op op = get_shared_nir_atomic_op(opcode);
+      atomic = nir_intrinsic_instr_create(b->nb.shader, op);
+      atomic->variables[0] = nir_deref_as_var(nir_copy_deref(atomic, deref));
+      fill_common_atomic_sources(b, opcode, w, &atomic->src[0]);
+   } else {
+      assert(chain->var->mode == vtn_variable_mode_ssbo);
+      struct vtn_type *type;
+      nir_ssa_def *offset, *index;
+      offset = vtn_access_chain_to_offset(b, chain, &index, &type, NULL, false);
+
+      nir_intrinsic_op op = get_ssbo_nir_atomic_op(opcode);
+
+      atomic = nir_intrinsic_instr_create(b->nb.shader, op);
+      atomic->src[0] = nir_src_for_ssa(index);
+      atomic->src[1] = nir_src_for_ssa(offset);
+      fill_common_atomic_sources(b, opcode, w, &atomic->src[2]);
+   }
+
+   nir_ssa_dest_init(&atomic->instr, &atomic->dest, 1, NULL);
+
+   struct vtn_type *type = vtn_value(b, w[1], vtn_value_type_type)->type;
+   struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_ssa);
+   val->ssa = rzalloc(b, struct vtn_ssa_value);
+   val->ssa->def = &atomic->dest.ssa;
+   val->ssa->type = type->type;
+
+   nir_builder_instr_insert(&b->nb, &atomic->instr);
+}
+
+static nir_alu_instr *
+create_vec(nir_shader *shader, unsigned num_components)
+{
+   nir_op op;
+   switch (num_components) {
+   case 1: op = nir_op_fmov; break;
+   case 2: op = nir_op_vec2; break;
+   case 3: op = nir_op_vec3; break;
+   case 4: op = nir_op_vec4; break;
+   default: unreachable("bad vector size");
+   }
+
+   nir_alu_instr *vec = nir_alu_instr_create(shader, op);
+   nir_ssa_dest_init(&vec->instr, &vec->dest.dest, num_components, NULL);
+   vec->dest.write_mask = (1 << num_components) - 1;
+
+   return vec;
+}
+
+struct vtn_ssa_value *
+vtn_ssa_transpose(struct vtn_builder *b, struct vtn_ssa_value *src)
+{
+   if (src->transposed)
+      return src->transposed;
+
+   struct vtn_ssa_value *dest =
+      vtn_create_ssa_value(b, glsl_transposed_type(src->type));
+
+   for (unsigned i = 0; i < glsl_get_matrix_columns(dest->type); i++) {
+      nir_alu_instr *vec = create_vec(b->shader,
+                                      glsl_get_matrix_columns(src->type));
+      if (glsl_type_is_vector_or_scalar(src->type)) {
+          vec->src[0].src = nir_src_for_ssa(src->def);
+          vec->src[0].swizzle[0] = i;
+      } else {
+         for (unsigned j = 0; j < glsl_get_matrix_columns(src->type); j++) {
+            vec->src[j].src = nir_src_for_ssa(src->elems[j]->def);
+            vec->src[j].swizzle[0] = i;
+         }
+      }
+      nir_builder_instr_insert(&b->nb, &vec->instr);
+      dest->elems[i]->def = &vec->dest.dest.ssa;
+   }
+
+   dest->transposed = src;
+
+   return dest;
+}
+
+nir_ssa_def *
+vtn_vector_extract(struct vtn_builder *b, nir_ssa_def *src, unsigned index)
+{
+   unsigned swiz[4] = { index };
+   return nir_swizzle(&b->nb, src, swiz, 1, true);
+}
+
+nir_ssa_def *
+vtn_vector_insert(struct vtn_builder *b, nir_ssa_def *src, nir_ssa_def *insert,
+                  unsigned index)
+{
+   nir_alu_instr *vec = create_vec(b->shader, src->num_components);
+
+   for (unsigned i = 0; i < src->num_components; i++) {
+      if (i == index) {
+         vec->src[i].src = nir_src_for_ssa(insert);
+      } else {
+         vec->src[i].src = nir_src_for_ssa(src);
+         vec->src[i].swizzle[0] = i;
+      }
+   }
+
+   nir_builder_instr_insert(&b->nb, &vec->instr);
+
+   return &vec->dest.dest.ssa;
+}
+
+nir_ssa_def *
+vtn_vector_extract_dynamic(struct vtn_builder *b, nir_ssa_def *src,
+                           nir_ssa_def *index)
+{
+   nir_ssa_def *dest = vtn_vector_extract(b, src, 0);
+   for (unsigned i = 1; i < src->num_components; i++)
+      dest = nir_bcsel(&b->nb, nir_ieq(&b->nb, index, nir_imm_int(&b->nb, i)),
+                       vtn_vector_extract(b, src, i), dest);
+
+   return dest;
+}
+
+nir_ssa_def *
+vtn_vector_insert_dynamic(struct vtn_builder *b, nir_ssa_def *src,
+                          nir_ssa_def *insert, nir_ssa_def *index)
+{
+   nir_ssa_def *dest = vtn_vector_insert(b, src, insert, 0);
+   for (unsigned i = 1; i < src->num_components; i++)
+      dest = nir_bcsel(&b->nb, nir_ieq(&b->nb, index, nir_imm_int(&b->nb, i)),
+                       vtn_vector_insert(b, src, insert, i), dest);
+
+   return dest;
+}
+
+static nir_ssa_def *
+vtn_vector_shuffle(struct vtn_builder *b, unsigned num_components,
+                   nir_ssa_def *src0, nir_ssa_def *src1,
+                   const uint32_t *indices)
+{
+   nir_alu_instr *vec = create_vec(b->shader, num_components);
+
+   nir_ssa_undef_instr *undef = nir_ssa_undef_instr_create(b->shader, 1);
+   nir_builder_instr_insert(&b->nb, &undef->instr);
+
+   for (unsigned i = 0; i < num_components; i++) {
+      uint32_t index = indices[i];
+      if (index == 0xffffffff) {
+         vec->src[i].src = nir_src_for_ssa(&undef->def);
+      } else if (index < src0->num_components) {
+         vec->src[i].src = nir_src_for_ssa(src0);
+         vec->src[i].swizzle[0] = index;
+      } else {
+         vec->src[i].src = nir_src_for_ssa(src1);
+         vec->src[i].swizzle[0] = index - src0->num_components;
+      }
+   }
+
+   nir_builder_instr_insert(&b->nb, &vec->instr);
+
+   return &vec->dest.dest.ssa;
+}
+
+/*
+ * Concatentates a number of vectors/scalars together to produce a vector
+ */
+static nir_ssa_def *
+vtn_vector_construct(struct vtn_builder *b, unsigned num_components,
+                     unsigned num_srcs, nir_ssa_def **srcs)
+{
+   nir_alu_instr *vec = create_vec(b->shader, num_components);
+
+   unsigned dest_idx = 0;
+   for (unsigned i = 0; i < num_srcs; i++) {
+      nir_ssa_def *src = srcs[i];
+      for (unsigned j = 0; j < src->num_components; j++) {
+         vec->src[dest_idx].src = nir_src_for_ssa(src);
+         vec->src[dest_idx].swizzle[0] = j;
+         dest_idx++;
+      }
+   }
+
+   nir_builder_instr_insert(&b->nb, &vec->instr);
+
+   return &vec->dest.dest.ssa;
+}
+
+static struct vtn_ssa_value *
+vtn_composite_copy(void *mem_ctx, struct vtn_ssa_value *src)
+{
+   struct vtn_ssa_value *dest = rzalloc(mem_ctx, struct vtn_ssa_value);
+   dest->type = src->type;
+
+   if (glsl_type_is_vector_or_scalar(src->type)) {
+      dest->def = src->def;
+   } else {
+      unsigned elems = glsl_get_length(src->type);
+
+      dest->elems = ralloc_array(mem_ctx, struct vtn_ssa_value *, elems);
+      for (unsigned i = 0; i < elems; i++)
+         dest->elems[i] = vtn_composite_copy(mem_ctx, src->elems[i]);
+   }
+
+   return dest;
+}
+
+static struct vtn_ssa_value *
+vtn_composite_insert(struct vtn_builder *b, struct vtn_ssa_value *src,
+                     struct vtn_ssa_value *insert, const uint32_t *indices,
+                     unsigned num_indices)
+{
+   struct vtn_ssa_value *dest = vtn_composite_copy(b, src);
+
+   struct vtn_ssa_value *cur = dest;
+   unsigned i;
+   for (i = 0; i < num_indices - 1; i++) {
+      cur = cur->elems[indices[i]];
+   }
+
+   if (glsl_type_is_vector_or_scalar(cur->type)) {
+      /* According to the SPIR-V spec, OpCompositeInsert may work down to
+       * the component granularity. In that case, the last index will be
+       * the index to insert the scalar into the vector.
+       */
+
+      cur->def = vtn_vector_insert(b, cur->def, insert->def, indices[i]);
+   } else {
+      cur->elems[indices[i]] = insert;
+   }
+
+   return dest;
+}
+
+static struct vtn_ssa_value *
+vtn_composite_extract(struct vtn_builder *b, struct vtn_ssa_value *src,
+                      const uint32_t *indices, unsigned num_indices)
+{
+   struct vtn_ssa_value *cur = src;
+   for (unsigned i = 0; i < num_indices; i++) {
+      if (glsl_type_is_vector_or_scalar(cur->type)) {
+         assert(i == num_indices - 1);
+         /* According to the SPIR-V spec, OpCompositeExtract may work down to
+          * the component granularity. The last index will be the index of the
+          * vector to extract.
+          */
+
+         struct vtn_ssa_value *ret = rzalloc(b, struct vtn_ssa_value);
+         ret->type = glsl_scalar_type(glsl_get_base_type(cur->type));
+         ret->def = vtn_vector_extract(b, cur->def, indices[i]);
+         return ret;
+      } else {
+         cur = cur->elems[indices[i]];
+      }
+   }
+
+   return cur;
+}
+
+static void
+vtn_handle_composite(struct vtn_builder *b, SpvOp opcode,
+                     const uint32_t *w, unsigned count)
+{
+   struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_ssa);
+   const struct glsl_type *type =
+      vtn_value(b, w[1], vtn_value_type_type)->type->type;
+   val->ssa = vtn_create_ssa_value(b, type);
+
+   switch (opcode) {
+   case SpvOpVectorExtractDynamic:
+      val->ssa->def = vtn_vector_extract_dynamic(b, vtn_ssa_value(b, w[3])->def,
+                                                 vtn_ssa_value(b, w[4])->def);
+      break;
+
+   case SpvOpVectorInsertDynamic:
+      val->ssa->def = vtn_vector_insert_dynamic(b, vtn_ssa_value(b, w[3])->def,
+                                                vtn_ssa_value(b, w[4])->def,
+                                                vtn_ssa_value(b, w[5])->def);
+      break;
+
+   case SpvOpVectorShuffle:
+      val->ssa->def = vtn_vector_shuffle(b, glsl_get_vector_elements(type),
+                                         vtn_ssa_value(b, w[3])->def,
+                                         vtn_ssa_value(b, w[4])->def,
+                                         w + 5);
+      break;
+
+   case SpvOpCompositeConstruct: {
+      unsigned elems = count - 3;
+      if (glsl_type_is_vector_or_scalar(type)) {
+         nir_ssa_def *srcs[4];
+         for (unsigned i = 0; i < elems; i++)
+            srcs[i] = vtn_ssa_value(b, w[3 + i])->def;
+         val->ssa->def =
+            vtn_vector_construct(b, glsl_get_vector_elements(type),
+                                 elems, srcs);
+      } else {
+         val->ssa->elems = ralloc_array(b, struct vtn_ssa_value *, elems);
+         for (unsigned i = 0; i < elems; i++)
+            val->ssa->elems[i] = vtn_ssa_value(b, w[3 + i]);
+      }
+      break;
+   }
+   case SpvOpCompositeExtract:
+      val->ssa = vtn_composite_extract(b, vtn_ssa_value(b, w[3]),
+                                       w + 4, count - 4);
+      break;
+
+   case SpvOpCompositeInsert:
+      val->ssa = vtn_composite_insert(b, vtn_ssa_value(b, w[4]),
+                                      vtn_ssa_value(b, w[3]),
+                                      w + 5, count - 5);
+      break;
+
+   case SpvOpCopyObject:
+      val->ssa = vtn_composite_copy(b, vtn_ssa_value(b, w[3]));
+      break;
+
+   default:
+      unreachable("unknown composite operation");
+   }
+}
+
+static void
+vtn_handle_barrier(struct vtn_builder *b, SpvOp opcode,
+                   const uint32_t *w, unsigned count)
+{
+   nir_intrinsic_op intrinsic_op;
+   switch (opcode) {
+   case SpvOpEmitVertex:
+   case SpvOpEmitStreamVertex:
+      intrinsic_op = nir_intrinsic_emit_vertex;
+      break;
+   case SpvOpEndPrimitive:
+   case SpvOpEndStreamPrimitive:
+      intrinsic_op = nir_intrinsic_end_primitive;
+      break;
+   case SpvOpMemoryBarrier:
+      intrinsic_op = nir_intrinsic_memory_barrier;
+      break;
+   case SpvOpControlBarrier:
+      intrinsic_op = nir_intrinsic_barrier;
+      break;
+   default:
+      unreachable("unknown barrier instruction");
+   }
+
+   nir_intrinsic_instr *intrin =
+      nir_intrinsic_instr_create(b->shader, intrinsic_op);
+
+   if (opcode == SpvOpEmitStreamVertex || opcode == SpvOpEndStreamPrimitive)
+      intrin->const_index[0] = w[1];
+
+   nir_builder_instr_insert(&b->nb, &intrin->instr);
+}
+
+static unsigned
+gl_primitive_from_spv_execution_mode(SpvExecutionMode mode)
+{
+   switch (mode) {
+   case SpvExecutionModeInputPoints:
+   case SpvExecutionModeOutputPoints:
+      return 0; /* GL_POINTS */
+   case SpvExecutionModeInputLines:
+      return 1; /* GL_LINES */
+   case SpvExecutionModeInputLinesAdjacency:
+      return 0x000A; /* GL_LINE_STRIP_ADJACENCY_ARB */
+   case SpvExecutionModeTriangles:
+      return 4; /* GL_TRIANGLES */
+   case SpvExecutionModeInputTrianglesAdjacency:
+      return 0x000C; /* GL_TRIANGLES_ADJACENCY_ARB */
+   case SpvExecutionModeQuads:
+      return 7; /* GL_QUADS */
+   case SpvExecutionModeIsolines:
+      return 0x8E7A; /* GL_ISOLINES */
+   case SpvExecutionModeOutputLineStrip:
+      return 3; /* GL_LINE_STRIP */
+   case SpvExecutionModeOutputTriangleStrip:
+      return 5; /* GL_TRIANGLE_STRIP */
+   default:
+      assert(!"Invalid primitive type");
+      return 4;
+   }
+}
+
+static unsigned
+vertices_in_from_spv_execution_mode(SpvExecutionMode mode)
+{
+   switch (mode) {
+   case SpvExecutionModeInputPoints:
+      return 1;
+   case SpvExecutionModeInputLines:
+      return 2;
+   case SpvExecutionModeInputLinesAdjacency:
+      return 4;
+   case SpvExecutionModeTriangles:
+      return 3;
+   case SpvExecutionModeInputTrianglesAdjacency:
+      return 6;
+   default:
+      assert(!"Invalid GS input mode");
+      return 0;
+   }
+}
+
+static gl_shader_stage
+stage_for_execution_model(SpvExecutionModel model)
+{
+   switch (model) {
+   case SpvExecutionModelVertex:
+      return MESA_SHADER_VERTEX;
+   case SpvExecutionModelTessellationControl:
+      return MESA_SHADER_TESS_CTRL;
+   case SpvExecutionModelTessellationEvaluation:
+      return MESA_SHADER_TESS_EVAL;
+   case SpvExecutionModelGeometry:
+      return MESA_SHADER_GEOMETRY;
+   case SpvExecutionModelFragment:
+      return MESA_SHADER_FRAGMENT;
+   case SpvExecutionModelGLCompute:
+      return MESA_SHADER_COMPUTE;
+   default:
+      unreachable("Unsupported execution model");
+   }
+}
+
+static bool
+vtn_handle_preamble_instruction(struct vtn_builder *b, SpvOp opcode,
+                                const uint32_t *w, unsigned count)
+{
+   switch (opcode) {
+   case SpvOpSource:
+   case SpvOpSourceExtension:
+   case SpvOpSourceContinued:
+   case SpvOpExtension:
+      /* Unhandled, but these are for debug so that's ok. */
+      break;
+
+   case SpvOpCapability:
+      switch ((SpvCapability)w[1]) {
+      case SpvCapabilityMatrix:
+      case SpvCapabilityShader:
+      case SpvCapabilityGeometry:
+         break;
+      default:
+         assert(!"Unsupported capability");
+      }
+      break;
+
+   case SpvOpExtInstImport:
+      vtn_handle_extension(b, opcode, w, count);
+      break;
+
+   case SpvOpMemoryModel:
+      assert(w[1] == SpvAddressingModelLogical);
+      assert(w[2] == SpvMemoryModelGLSL450);
+      break;
+
+   case SpvOpEntryPoint: {
+      struct vtn_value *entry_point = &b->values[w[2]];
+      /* Let this be a name label regardless */
+      unsigned name_words;
+      entry_point->name = vtn_string_literal(b, &w[3], count - 3, &name_words);
+
+      if (strcmp(entry_point->name, b->entry_point_name) != 0 ||
+          stage_for_execution_model(w[1]) != b->entry_point_stage)
+         break;
+
+      assert(b->entry_point == NULL);
+      b->entry_point = entry_point;
+      break;
+   }
+
+   case SpvOpString:
+      vtn_push_value(b, w[1], vtn_value_type_string)->str =
+         vtn_string_literal(b, &w[2], count - 2, NULL);
+      break;
+
+   case SpvOpName:
+      b->values[w[1]].name = vtn_string_literal(b, &w[2], count - 2, NULL);
+      break;
+
+   case SpvOpMemberName:
+      /* TODO */
+      break;
+
+   case SpvOpExecutionMode:
+   case SpvOpDecorationGroup:
+   case SpvOpDecorate:
+   case SpvOpMemberDecorate:
+   case SpvOpGroupDecorate:
+   case SpvOpGroupMemberDecorate:
+      vtn_handle_decoration(b, opcode, w, count);
+      break;
+
+   default:
+      return false; /* End of preamble */
+   }
+
+   return true;
+}
+
+static void
+vtn_handle_execution_mode(struct vtn_builder *b, struct vtn_value *entry_point,
+                          const struct vtn_decoration *mode, void *data)
+{
+   assert(b->entry_point == entry_point);
+
+   switch(mode->exec_mode) {
+   case SpvExecutionModeOriginUpperLeft:
+   case SpvExecutionModeOriginLowerLeft:
+      b->origin_upper_left =
+         (mode->exec_mode == SpvExecutionModeOriginUpperLeft);
+      break;
+
+   case SpvExecutionModeEarlyFragmentTests:
+      assert(b->shader->stage == MESA_SHADER_FRAGMENT);
+      b->shader->info.fs.early_fragment_tests = true;
+      break;
+
+   case SpvExecutionModeInvocations:
+      assert(b->shader->stage == MESA_SHADER_GEOMETRY);
+      b->shader->info.gs.invocations = MAX2(1, mode->literals[0]);
+      break;
+
+   case SpvExecutionModeDepthReplacing:
+      assert(b->shader->stage == MESA_SHADER_FRAGMENT);
+      b->shader->info.fs.depth_layout = FRAG_DEPTH_LAYOUT_ANY;
+      break;
+   case SpvExecutionModeDepthGreater:
+      assert(b->shader->stage == MESA_SHADER_FRAGMENT);
+      b->shader->info.fs.depth_layout = FRAG_DEPTH_LAYOUT_GREATER;
+      break;
+   case SpvExecutionModeDepthLess:
+      assert(b->shader->stage == MESA_SHADER_FRAGMENT);
+      b->shader->info.fs.depth_layout = FRAG_DEPTH_LAYOUT_LESS;
+      break;
+   case SpvExecutionModeDepthUnchanged:
+      assert(b->shader->stage == MESA_SHADER_FRAGMENT);
+      b->shader->info.fs.depth_layout = FRAG_DEPTH_LAYOUT_UNCHANGED;
+      break;
+
+   case SpvExecutionModeLocalSize:
+      assert(b->shader->stage == MESA_SHADER_COMPUTE);
+      b->shader->info.cs.local_size[0] = mode->literals[0];
+      b->shader->info.cs.local_size[1] = mode->literals[1];
+      b->shader->info.cs.local_size[2] = mode->literals[2];
+      break;
+   case SpvExecutionModeLocalSizeHint:
+      break; /* Nothing do do with this */
+
+   case SpvExecutionModeOutputVertices:
+      assert(b->shader->stage == MESA_SHADER_GEOMETRY);
+      b->shader->info.gs.vertices_out = mode->literals[0];
+      break;
+
+   case SpvExecutionModeInputPoints:
+   case SpvExecutionModeInputLines:
+   case SpvExecutionModeInputLinesAdjacency:
+   case SpvExecutionModeTriangles:
+   case SpvExecutionModeInputTrianglesAdjacency:
+   case SpvExecutionModeQuads:
+   case SpvExecutionModeIsolines:
+      if (b->shader->stage == MESA_SHADER_GEOMETRY) {
+         b->shader->info.gs.vertices_in =
+            vertices_in_from_spv_execution_mode(mode->exec_mode);
+      } else {
+         assert(!"Tesselation shaders not yet supported");
+      }
+      break;
+
+   case SpvExecutionModeOutputPoints:
+   case SpvExecutionModeOutputLineStrip:
+   case SpvExecutionModeOutputTriangleStrip:
+      assert(b->shader->stage == MESA_SHADER_GEOMETRY);
+      b->shader->info.gs.output_primitive =
+         gl_primitive_from_spv_execution_mode(mode->exec_mode);
+      break;
+
+   case SpvExecutionModeSpacingEqual:
+   case SpvExecutionModeSpacingFractionalEven:
+   case SpvExecutionModeSpacingFractionalOdd:
+   case SpvExecutionModeVertexOrderCw:
+   case SpvExecutionModeVertexOrderCcw:
+   case SpvExecutionModePointMode:
+      assert(!"TODO: Add tessellation metadata");
+      break;
+
+   case SpvExecutionModePixelCenterInteger:
+   case SpvExecutionModeXfb:
+      assert(!"Unhandled execution mode");
+      break;
+
+   case SpvExecutionModeVecTypeHint:
+   case SpvExecutionModeContractionOff:
+      break; /* OpenCL */
+   }
+}
+
+static bool
+vtn_handle_variable_or_type_instruction(struct vtn_builder *b, SpvOp opcode,
+                                        const uint32_t *w, unsigned count)
+{
+   switch (opcode) {
+   case SpvOpSource:
+   case SpvOpSourceContinued:
+   case SpvOpSourceExtension:
+   case SpvOpExtension:
+   case SpvOpCapability:
+   case SpvOpExtInstImport:
+   case SpvOpMemoryModel:
+   case SpvOpEntryPoint:
+   case SpvOpExecutionMode:
+   case SpvOpString:
+   case SpvOpName:
+   case SpvOpMemberName:
+   case SpvOpDecorationGroup:
+   case SpvOpDecorate:
+   case SpvOpMemberDecorate:
+   case SpvOpGroupDecorate:
+   case SpvOpGroupMemberDecorate:
+      assert(!"Invalid opcode types and variables section");
+      break;
+
+   case SpvOpTypeVoid:
+   case SpvOpTypeBool:
+   case SpvOpTypeInt:
+   case SpvOpTypeFloat:
+   case SpvOpTypeVector:
+   case SpvOpTypeMatrix:
+   case SpvOpTypeImage:
+   case SpvOpTypeSampler:
+   case SpvOpTypeSampledImage:
+   case SpvOpTypeArray:
+   case SpvOpTypeRuntimeArray:
+   case SpvOpTypeStruct:
+   case SpvOpTypeOpaque:
+   case SpvOpTypePointer:
+   case SpvOpTypeFunction:
+   case SpvOpTypeEvent:
+   case SpvOpTypeDeviceEvent:
+   case SpvOpTypeReserveId:
+   case SpvOpTypeQueue:
+   case SpvOpTypePipe:
+      vtn_handle_type(b, opcode, w, count);
+      break;
+
+   case SpvOpConstantTrue:
+   case SpvOpConstantFalse:
+   case SpvOpConstant:
+   case SpvOpConstantComposite:
+   case SpvOpConstantSampler:
+   case SpvOpConstantNull:
+   case SpvOpSpecConstantTrue:
+   case SpvOpSpecConstantFalse:
+   case SpvOpSpecConstant:
+   case SpvOpSpecConstantComposite:
+   case SpvOpSpecConstantOp:
+      vtn_handle_constant(b, opcode, w, count);
+      break;
+
+   case SpvOpVariable:
+      vtn_handle_variables(b, opcode, w, count);
+      break;
+
+   default:
+      return false; /* End of preamble */
+   }
+
+   return true;
+}
+
+static bool
+vtn_handle_body_instruction(struct vtn_builder *b, SpvOp opcode,
+                            const uint32_t *w, unsigned count)
+{
+   switch (opcode) {
+   case SpvOpLabel:
+      break;
+
+   case SpvOpLoopMerge:
+   case SpvOpSelectionMerge:
+      /* This is handled by cfg pre-pass and walk_blocks */
+      break;
+
+   case SpvOpUndef: {
+      struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_undef);
+      val->type = vtn_value(b, w[1], vtn_value_type_type)->type;
+      break;
+   }
+
+   case SpvOpExtInst:
+      vtn_handle_extension(b, opcode, w, count);
+      break;
+
+   case SpvOpVariable:
+   case SpvOpLoad:
+   case SpvOpStore:
+   case SpvOpCopyMemory:
+   case SpvOpCopyMemorySized:
+   case SpvOpAccessChain:
+   case SpvOpInBoundsAccessChain:
+   case SpvOpArrayLength:
+      vtn_handle_variables(b, opcode, w, count);
+      break;
+
+   case SpvOpFunctionCall:
+      vtn_handle_function_call(b, opcode, w, count);
+      break;
+
+   case SpvOpSampledImage:
+   case SpvOpImage:
+   case SpvOpImageSampleImplicitLod:
+   case SpvOpImageSampleExplicitLod:
+   case SpvOpImageSampleDrefImplicitLod:
+   case SpvOpImageSampleDrefExplicitLod:
+   case SpvOpImageSampleProjImplicitLod:
+   case SpvOpImageSampleProjExplicitLod:
+   case SpvOpImageSampleProjDrefImplicitLod:
+   case SpvOpImageSampleProjDrefExplicitLod:
+   case SpvOpImageFetch:
+   case SpvOpImageGather:
+   case SpvOpImageDrefGather:
+   case SpvOpImageQuerySizeLod:
+   case SpvOpImageQueryLod:
+   case SpvOpImageQueryLevels:
+   case SpvOpImageQuerySamples:
+      vtn_handle_texture(b, opcode, w, count);
+      break;
+
+   case SpvOpImageRead:
+   case SpvOpImageWrite:
+   case SpvOpImageTexelPointer:
+      vtn_handle_image(b, opcode, w, count);
+      break;
+
+   case SpvOpImageQuerySize: {
+      struct vtn_access_chain *image =
+         vtn_value(b, w[3], vtn_value_type_access_chain)->access_chain;
+      if (glsl_type_is_image(image->var->var->interface_type)) {
+         vtn_handle_image(b, opcode, w, count);
+      } else {
+         vtn_handle_texture(b, opcode, w, count);
+      }
+      break;
+   }
+
+   case SpvOpAtomicExchange:
+   case SpvOpAtomicCompareExchange:
+   case SpvOpAtomicCompareExchangeWeak:
+   case SpvOpAtomicIIncrement:
+   case SpvOpAtomicIDecrement:
+   case SpvOpAtomicIAdd:
+   case SpvOpAtomicISub:
+   case SpvOpAtomicSMin:
+   case SpvOpAtomicUMin:
+   case SpvOpAtomicSMax:
+   case SpvOpAtomicUMax:
+   case SpvOpAtomicAnd:
+   case SpvOpAtomicOr:
+   case SpvOpAtomicXor: {
+      struct vtn_value *pointer = vtn_untyped_value(b, w[3]);
+      if (pointer->value_type == vtn_value_type_image_pointer) {
+         vtn_handle_image(b, opcode, w, count);
+      } else {
+         assert(pointer->value_type == vtn_value_type_access_chain);
+         vtn_handle_ssbo_or_shared_atomic(b, opcode, w, count);
+      }
+      break;
+   }
+
+   case SpvOpSNegate:
+   case SpvOpFNegate:
+   case SpvOpNot:
+   case SpvOpAny:
+   case SpvOpAll:
+   case SpvOpConvertFToU:
+   case SpvOpConvertFToS:
+   case SpvOpConvertSToF:
+   case SpvOpConvertUToF:
+   case SpvOpUConvert:
+   case SpvOpSConvert:
+   case SpvOpFConvert:
+   case SpvOpQuantizeToF16:
+   case SpvOpConvertPtrToU:
+   case SpvOpConvertUToPtr:
+   case SpvOpPtrCastToGeneric:
+   case SpvOpGenericCastToPtr:
+   case SpvOpBitcast:
+   case SpvOpIsNan:
+   case SpvOpIsInf:
+   case SpvOpIsFinite:
+   case SpvOpIsNormal:
+   case SpvOpSignBitSet:
+   case SpvOpLessOrGreater:
+   case SpvOpOrdered:
+   case SpvOpUnordered:
+   case SpvOpIAdd:
+   case SpvOpFAdd:
+   case SpvOpISub:
+   case SpvOpFSub:
+   case SpvOpIMul:
+   case SpvOpFMul:
+   case SpvOpUDiv:
+   case SpvOpSDiv:
+   case SpvOpFDiv:
+   case SpvOpUMod:
+   case SpvOpSRem:
+   case SpvOpSMod:
+   case SpvOpFRem:
+   case SpvOpFMod:
+   case SpvOpVectorTimesScalar:
+   case SpvOpDot:
+   case SpvOpIAddCarry:
+   case SpvOpISubBorrow:
+   case SpvOpUMulExtended:
+   case SpvOpSMulExtended:
+   case SpvOpShiftRightLogical:
+   case SpvOpShiftRightArithmetic:
+   case SpvOpShiftLeftLogical:
+   case SpvOpLogicalEqual:
+   case SpvOpLogicalNotEqual:
+   case SpvOpLogicalOr:
+   case SpvOpLogicalAnd:
+   case SpvOpLogicalNot:
+   case SpvOpBitwiseOr:
+   case SpvOpBitwiseXor:
+   case SpvOpBitwiseAnd:
+   case SpvOpSelect:
+   case SpvOpIEqual:
+   case SpvOpFOrdEqual:
+   case SpvOpFUnordEqual:
+   case SpvOpINotEqual:
+   case SpvOpFOrdNotEqual:
+   case SpvOpFUnordNotEqual:
+   case SpvOpULessThan:
+   case SpvOpSLessThan:
+   case SpvOpFOrdLessThan:
+   case SpvOpFUnordLessThan:
+   case SpvOpUGreaterThan:
+   case SpvOpSGreaterThan:
+   case SpvOpFOrdGreaterThan:
+   case SpvOpFUnordGreaterThan:
+   case SpvOpULessThanEqual:
+   case SpvOpSLessThanEqual:
+   case SpvOpFOrdLessThanEqual:
+   case SpvOpFUnordLessThanEqual:
+   case SpvOpUGreaterThanEqual:
+   case SpvOpSGreaterThanEqual:
+   case SpvOpFOrdGreaterThanEqual:
+   case SpvOpFUnordGreaterThanEqual:
+   case SpvOpDPdx:
+   case SpvOpDPdy:
+   case SpvOpFwidth:
+   case SpvOpDPdxFine:
+   case SpvOpDPdyFine:
+   case SpvOpFwidthFine:
+   case SpvOpDPdxCoarse:
+   case SpvOpDPdyCoarse:
+   case SpvOpFwidthCoarse:
+   case SpvOpBitFieldInsert:
+   case SpvOpBitFieldSExtract:
+   case SpvOpBitFieldUExtract:
+   case SpvOpBitReverse:
+   case SpvOpBitCount:
+   case SpvOpTranspose:
+   case SpvOpOuterProduct:
+   case SpvOpMatrixTimesScalar:
+   case SpvOpVectorTimesMatrix:
+   case SpvOpMatrixTimesVector:
+   case SpvOpMatrixTimesMatrix:
+      vtn_handle_alu(b, opcode, w, count);
+      break;
+
+   case SpvOpVectorExtractDynamic:
+   case SpvOpVectorInsertDynamic:
+   case SpvOpVectorShuffle:
+   case SpvOpCompositeConstruct:
+   case SpvOpCompositeExtract:
+   case SpvOpCompositeInsert:
+   case SpvOpCopyObject:
+      vtn_handle_composite(b, opcode, w, count);
+      break;
+
+   case SpvOpEmitVertex:
+   case SpvOpEndPrimitive:
+   case SpvOpEmitStreamVertex:
+   case SpvOpEndStreamPrimitive:
+   case SpvOpControlBarrier:
+   case SpvOpMemoryBarrier:
+      vtn_handle_barrier(b, opcode, w, count);
+      break;
+
+   default:
+      unreachable("Unhandled opcode");
+   }
+
+   return true;
+}
+
+nir_function *
+spirv_to_nir(const uint32_t *words, size_t word_count,
+             struct nir_spirv_specialization *spec, unsigned num_spec,
+             gl_shader_stage stage, const char *entry_point_name,
+             const nir_shader_compiler_options *options)
+{
+   const uint32_t *word_end = words + word_count;
+
+   /* Handle the SPIR-V header (first 4 dwords)  */
+   assert(word_count > 5);
+
+   assert(words[0] == SpvMagicNumber);
+   assert(words[1] >= 0x10000);
+   /* words[2] == generator magic */
+   unsigned value_id_bound = words[3];
+   assert(words[4] == 0);
+
+   words+= 5;
+
+   /* Initialize the stn_builder object */
+   struct vtn_builder *b = rzalloc(NULL, struct vtn_builder);
+   b->value_id_bound = value_id_bound;
+   b->values = rzalloc_array(b, struct vtn_value, value_id_bound);
+   exec_list_make_empty(&b->functions);
+   b->entry_point_stage = stage;
+   b->entry_point_name = entry_point_name;
+
+   /* Handle all the preamble instructions */
+   words = vtn_foreach_instruction(b, words, word_end,
+                                   vtn_handle_preamble_instruction);
+
+   if (b->entry_point == NULL) {
+      assert(!"Entry point not found");
+      ralloc_free(b);
+      return NULL;
+   }
+
+   b->shader = nir_shader_create(NULL, stage, options);
+
+   /* Parse execution modes */
+   vtn_foreach_execution_mode(b, b->entry_point,
+                              vtn_handle_execution_mode, NULL);
+
+   b->specializations = spec;
+   b->num_specializations = num_spec;
+
+   /* Handle all variable, type, and constant instructions */
+   words = vtn_foreach_instruction(b, words, word_end,
+                                   vtn_handle_variable_or_type_instruction);
+
+   vtn_build_cfg(b, words, word_end);
+
+   foreach_list_typed(struct vtn_function, func, node, &b->functions) {
+      b->impl = func->impl;
+      b->const_table = _mesa_hash_table_create(b, _mesa_hash_pointer,
+                                               _mesa_key_pointer_equal);
+
+      vtn_function_emit(b, func, vtn_handle_body_instruction);
+   }
+
+   assert(b->entry_point->value_type == vtn_value_type_function);
+   nir_function *entry_point = b->entry_point->func->impl->function;
+   assert(entry_point);
+
+   ralloc_free(b);
+
+   return entry_point;
+}
diff --git a/src/compiler/nir/spirv/vtn_alu.c b/src/compiler/nir/spirv/vtn_alu.c
new file mode 100644
index 00000000000..d866da7445e
--- /dev/null
+++ b/src/compiler/nir/spirv/vtn_alu.c
@@ -0,0 +1,448 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "vtn_private.h"
+
+/*
+ * Normally, column vectors in SPIR-V correspond to a single NIR SSA
+ * definition. But for matrix multiplies, we want to do one routine for
+ * multiplying a matrix by a matrix and then pretend that vectors are matrices
+ * with one column. So we "wrap" these things, and unwrap the result before we
+ * send it off.
+ */
+
+static struct vtn_ssa_value *
+wrap_matrix(struct vtn_builder *b, struct vtn_ssa_value *val)
+{
+   if (val == NULL)
+      return NULL;
+
+   if (glsl_type_is_matrix(val->type))
+      return val;
+
+   struct vtn_ssa_value *dest = rzalloc(b, struct vtn_ssa_value);
+   dest->type = val->type;
+   dest->elems = ralloc_array(b, struct vtn_ssa_value *, 1);
+   dest->elems[0] = val;
+
+   return dest;
+}
+
+static struct vtn_ssa_value *
+unwrap_matrix(struct vtn_ssa_value *val)
+{
+   if (glsl_type_is_matrix(val->type))
+         return val;
+
+   return val->elems[0];
+}
+
+static struct vtn_ssa_value *
+matrix_multiply(struct vtn_builder *b,
+                struct vtn_ssa_value *_src0, struct vtn_ssa_value *_src1)
+{
+
+   struct vtn_ssa_value *src0 = wrap_matrix(b, _src0);
+   struct vtn_ssa_value *src1 = wrap_matrix(b, _src1);
+   struct vtn_ssa_value *src0_transpose = wrap_matrix(b, _src0->transposed);
+   struct vtn_ssa_value *src1_transpose = wrap_matrix(b, _src1->transposed);
+
+   unsigned src0_rows = glsl_get_vector_elements(src0->type);
+   unsigned src0_columns = glsl_get_matrix_columns(src0->type);
+   unsigned src1_columns = glsl_get_matrix_columns(src1->type);
+
+   const struct glsl_type *dest_type;
+   if (src1_columns > 1) {
+      dest_type = glsl_matrix_type(glsl_get_base_type(src0->type),
+                                   src0_rows, src1_columns);
+   } else {
+      dest_type = glsl_vector_type(glsl_get_base_type(src0->type), src0_rows);
+   }
+   struct vtn_ssa_value *dest = vtn_create_ssa_value(b, dest_type);
+
+   dest = wrap_matrix(b, dest);
+
+   bool transpose_result = false;
+   if (src0_transpose && src1_transpose) {
+      /* transpose(A) * transpose(B) = transpose(B * A) */
+      src1 = src0_transpose;
+      src0 = src1_transpose;
+      src0_transpose = NULL;
+      src1_transpose = NULL;
+      transpose_result = true;
+   }
+
+   if (src0_transpose && !src1_transpose &&
+       glsl_get_base_type(src0->type) == GLSL_TYPE_FLOAT) {
+      /* We already have the rows of src0 and the columns of src1 available,
+       * so we can just take the dot product of each row with each column to
+       * get the result.
+       */
+
+      for (unsigned i = 0; i < src1_columns; i++) {
+         nir_ssa_def *vec_src[4];
+         for (unsigned j = 0; j < src0_rows; j++) {
+            vec_src[j] = nir_fdot(&b->nb, src0_transpose->elems[j]->def,
+                                          src1->elems[i]->def);
+         }
+         dest->elems[i]->def = nir_vec(&b->nb, vec_src, src0_rows);
+      }
+   } else {
+      /* We don't handle the case where src1 is transposed but not src0, since
+       * the general case only uses individual components of src1 so the
+       * optimizer should chew through the transpose we emitted for src1.
+       */
+
+      for (unsigned i = 0; i < src1_columns; i++) {
+         /* dest[i] = sum(src0[j] * src1[i][j] for all j) */
+         dest->elems[i]->def =
+            nir_fmul(&b->nb, src0->elems[0]->def,
+                     nir_channel(&b->nb, src1->elems[i]->def, 0));
+         for (unsigned j = 1; j < src0_columns; j++) {
+            dest->elems[i]->def =
+               nir_fadd(&b->nb, dest->elems[i]->def,
+                        nir_fmul(&b->nb, src0->elems[j]->def,
+                                 nir_channel(&b->nb, src1->elems[i]->def, j)));
+         }
+      }
+   }
+
+   dest = unwrap_matrix(dest);
+
+   if (transpose_result)
+      dest = vtn_ssa_transpose(b, dest);
+
+   return dest;
+}
+
+static struct vtn_ssa_value *
+mat_times_scalar(struct vtn_builder *b,
+                 struct vtn_ssa_value *mat,
+                 nir_ssa_def *scalar)
+{
+   struct vtn_ssa_value *dest = vtn_create_ssa_value(b, mat->type);
+   for (unsigned i = 0; i < glsl_get_matrix_columns(mat->type); i++) {
+      if (glsl_get_base_type(mat->type) == GLSL_TYPE_FLOAT)
+         dest->elems[i]->def = nir_fmul(&b->nb, mat->elems[i]->def, scalar);
+      else
+         dest->elems[i]->def = nir_imul(&b->nb, mat->elems[i]->def, scalar);
+   }
+
+   return dest;
+}
+
+static void
+vtn_handle_matrix_alu(struct vtn_builder *b, SpvOp opcode,
+                      struct vtn_value *dest,
+                      struct vtn_ssa_value *src0, struct vtn_ssa_value *src1)
+{
+   switch (opcode) {
+   case SpvOpFNegate: {
+      dest->ssa = vtn_create_ssa_value(b, src0->type);
+      unsigned cols = glsl_get_matrix_columns(src0->type);
+      for (unsigned i = 0; i < cols; i++)
+         dest->ssa->elems[i]->def = nir_fneg(&b->nb, src0->elems[i]->def);
+      break;
+   }
+
+   case SpvOpFAdd: {
+      dest->ssa = vtn_create_ssa_value(b, src0->type);
+      unsigned cols = glsl_get_matrix_columns(src0->type);
+      for (unsigned i = 0; i < cols; i++)
+         dest->ssa->elems[i]->def =
+            nir_fadd(&b->nb, src0->elems[i]->def, src1->elems[i]->def);
+      break;
+   }
+
+   case SpvOpFSub: {
+      dest->ssa = vtn_create_ssa_value(b, src0->type);
+      unsigned cols = glsl_get_matrix_columns(src0->type);
+      for (unsigned i = 0; i < cols; i++)
+         dest->ssa->elems[i]->def =
+            nir_fsub(&b->nb, src0->elems[i]->def, src1->elems[i]->def);
+      break;
+   }
+
+   case SpvOpTranspose:
+      dest->ssa = vtn_ssa_transpose(b, src0);
+      break;
+
+   case SpvOpMatrixTimesScalar:
+      if (src0->transposed) {
+         dest->ssa = vtn_ssa_transpose(b, mat_times_scalar(b, src0->transposed,
+                                                           src1->def));
+      } else {
+         dest->ssa = mat_times_scalar(b, src0, src1->def);
+      }
+      break;
+
+   case SpvOpVectorTimesMatrix:
+   case SpvOpMatrixTimesVector:
+   case SpvOpMatrixTimesMatrix:
+      if (opcode == SpvOpVectorTimesMatrix) {
+         dest->ssa = matrix_multiply(b, vtn_ssa_transpose(b, src1), src0);
+      } else {
+         dest->ssa = matrix_multiply(b, src0, src1);
+      }
+      break;
+
+   default: unreachable("unknown matrix opcode");
+   }
+}
+
+nir_op
+vtn_nir_alu_op_for_spirv_opcode(SpvOp opcode, bool *swap)
+{
+   /* Indicates that the first two arguments should be swapped.  This is
+    * used for implementing greater-than and less-than-or-equal.
+    */
+   *swap = false;
+
+   switch (opcode) {
+   case SpvOpSNegate:            return nir_op_ineg;
+   case SpvOpFNegate:            return nir_op_fneg;
+   case SpvOpNot:                return nir_op_inot;
+   case SpvOpIAdd:               return nir_op_iadd;
+   case SpvOpFAdd:               return nir_op_fadd;
+   case SpvOpISub:               return nir_op_isub;
+   case SpvOpFSub:               return nir_op_fsub;
+   case SpvOpIMul:               return nir_op_imul;
+   case SpvOpFMul:               return nir_op_fmul;
+   case SpvOpUDiv:               return nir_op_udiv;
+   case SpvOpSDiv:               return nir_op_idiv;
+   case SpvOpFDiv:               return nir_op_fdiv;
+   case SpvOpUMod:               return nir_op_umod;
+   case SpvOpSMod:               return nir_op_imod;
+   case SpvOpFMod:               return nir_op_fmod;
+   case SpvOpSRem:               return nir_op_irem;
+   case SpvOpFRem:               return nir_op_frem;
+
+   case SpvOpShiftRightLogical:     return nir_op_ushr;
+   case SpvOpShiftRightArithmetic:  return nir_op_ishr;
+   case SpvOpShiftLeftLogical:      return nir_op_ishl;
+   case SpvOpLogicalOr:             return nir_op_ior;
+   case SpvOpLogicalEqual:          return nir_op_ieq;
+   case SpvOpLogicalNotEqual:       return nir_op_ine;
+   case SpvOpLogicalAnd:            return nir_op_iand;
+   case SpvOpLogicalNot:            return nir_op_inot;
+   case SpvOpBitwiseOr:             return nir_op_ior;
+   case SpvOpBitwiseXor:            return nir_op_ixor;
+   case SpvOpBitwiseAnd:            return nir_op_iand;
+   case SpvOpSelect:                return nir_op_bcsel;
+   case SpvOpIEqual:                return nir_op_ieq;
+
+   case SpvOpBitFieldInsert:        return nir_op_bitfield_insert;
+   case SpvOpBitFieldSExtract:      return nir_op_ibitfield_extract;
+   case SpvOpBitFieldUExtract:      return nir_op_ubitfield_extract;
+   case SpvOpBitReverse:            return nir_op_bitfield_reverse;
+   case SpvOpBitCount:              return nir_op_bit_count;
+
+   /* Comparisons: (TODO: How do we want to handled ordered/unordered?) */
+   case SpvOpFOrdEqual:                            return nir_op_feq;
+   case SpvOpFUnordEqual:                          return nir_op_feq;
+   case SpvOpINotEqual:                            return nir_op_ine;
+   case SpvOpFOrdNotEqual:                         return nir_op_fne;
+   case SpvOpFUnordNotEqual:                       return nir_op_fne;
+   case SpvOpULessThan:                            return nir_op_ult;
+   case SpvOpSLessThan:                            return nir_op_ilt;
+   case SpvOpFOrdLessThan:                         return nir_op_flt;
+   case SpvOpFUnordLessThan:                       return nir_op_flt;
+   case SpvOpUGreaterThan:          *swap = true;  return nir_op_ult;
+   case SpvOpSGreaterThan:          *swap = true;  return nir_op_ilt;
+   case SpvOpFOrdGreaterThan:       *swap = true;  return nir_op_flt;
+   case SpvOpFUnordGreaterThan:     *swap = true;  return nir_op_flt;
+   case SpvOpULessThanEqual:        *swap = true;  return nir_op_uge;
+   case SpvOpSLessThanEqual:        *swap = true;  return nir_op_ige;
+   case SpvOpFOrdLessThanEqual:     *swap = true;  return nir_op_fge;
+   case SpvOpFUnordLessThanEqual:   *swap = true;  return nir_op_fge;
+   case SpvOpUGreaterThanEqual:                    return nir_op_uge;
+   case SpvOpSGreaterThanEqual:                    return nir_op_ige;
+   case SpvOpFOrdGreaterThanEqual:                 return nir_op_fge;
+   case SpvOpFUnordGreaterThanEqual:               return nir_op_fge;
+
+   /* Conversions: */
+   case SpvOpConvertFToU:           return nir_op_f2u;
+   case SpvOpConvertFToS:           return nir_op_f2i;
+   case SpvOpConvertSToF:           return nir_op_i2f;
+   case SpvOpConvertUToF:           return nir_op_u2f;
+   case SpvOpBitcast:               return nir_op_imov;
+   case SpvOpUConvert:
+   case SpvOpQuantizeToF16:         return nir_op_fquantize2f16;
+   /* TODO: NIR is 32-bit only; these are no-ops. */
+   case SpvOpSConvert:              return nir_op_imov;
+   case SpvOpFConvert:              return nir_op_fmov;
+
+   /* Derivatives: */
+   case SpvOpDPdx:         return nir_op_fddx;
+   case SpvOpDPdy:         return nir_op_fddy;
+   case SpvOpDPdxFine:     return nir_op_fddx_fine;
+   case SpvOpDPdyFine:     return nir_op_fddy_fine;
+   case SpvOpDPdxCoarse:   return nir_op_fddx_coarse;
+   case SpvOpDPdyCoarse:   return nir_op_fddy_coarse;
+
+   default:
+      unreachable("No NIR equivalent");
+   }
+}
+
+void
+vtn_handle_alu(struct vtn_builder *b, SpvOp opcode,
+               const uint32_t *w, unsigned count)
+{
+   struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_ssa);
+   const struct glsl_type *type =
+      vtn_value(b, w[1], vtn_value_type_type)->type->type;
+
+   /* Collect the various SSA sources */
+   const unsigned num_inputs = count - 3;
+   struct vtn_ssa_value *vtn_src[4] = { NULL, };
+   for (unsigned i = 0; i < num_inputs; i++)
+      vtn_src[i] = vtn_ssa_value(b, w[i + 3]);
+
+   if (glsl_type_is_matrix(vtn_src[0]->type) ||
+       (num_inputs >= 2 && glsl_type_is_matrix(vtn_src[1]->type))) {
+      vtn_handle_matrix_alu(b, opcode, val, vtn_src[0], vtn_src[1]);
+      return;
+   }
+
+   val->ssa = vtn_create_ssa_value(b, type);
+   nir_ssa_def *src[4] = { NULL, };
+   for (unsigned i = 0; i < num_inputs; i++) {
+      assert(glsl_type_is_vector_or_scalar(vtn_src[i]->type));
+      src[i] = vtn_src[i]->def;
+   }
+
+   switch (opcode) {
+   case SpvOpAny:
+      if (src[0]->num_components == 1) {
+         val->ssa->def = nir_imov(&b->nb, src[0]);
+      } else {
+         nir_op op;
+         switch (src[0]->num_components) {
+         case 2:  op = nir_op_bany_inequal2; break;
+         case 3:  op = nir_op_bany_inequal3; break;
+         case 4:  op = nir_op_bany_inequal4; break;
+         }
+         val->ssa->def = nir_build_alu(&b->nb, op, src[0],
+                                       nir_imm_int(&b->nb, NIR_FALSE),
+                                       NULL, NULL);
+      }
+      return;
+
+   case SpvOpAll:
+      if (src[0]->num_components == 1) {
+         val->ssa->def = nir_imov(&b->nb, src[0]);
+      } else {
+         nir_op op;
+         switch (src[0]->num_components) {
+         case 2:  op = nir_op_ball_iequal2;  break;
+         case 3:  op = nir_op_ball_iequal3;  break;
+         case 4:  op = nir_op_ball_iequal4;  break;
+         }
+         val->ssa->def = nir_build_alu(&b->nb, op, src[0],
+                                       nir_imm_int(&b->nb, NIR_TRUE),
+                                       NULL, NULL);
+      }
+      return;
+
+   case SpvOpOuterProduct: {
+      for (unsigned i = 0; i < src[1]->num_components; i++) {
+         val->ssa->elems[i]->def =
+            nir_fmul(&b->nb, src[0], nir_channel(&b->nb, src[1], i));
+      }
+      return;
+   }
+
+   case SpvOpDot:
+      val->ssa->def = nir_fdot(&b->nb, src[0], src[1]);
+      return;
+
+   case SpvOpIAddCarry:
+      assert(glsl_type_is_struct(val->ssa->type));
+      val->ssa->elems[0]->def = nir_iadd(&b->nb, src[0], src[1]);
+      val->ssa->elems[1]->def = nir_uadd_carry(&b->nb, src[0], src[1]);
+      return;
+
+   case SpvOpISubBorrow:
+      assert(glsl_type_is_struct(val->ssa->type));
+      val->ssa->elems[0]->def = nir_isub(&b->nb, src[0], src[1]);
+      val->ssa->elems[1]->def = nir_usub_borrow(&b->nb, src[0], src[1]);
+      return;
+
+   case SpvOpUMulExtended:
+      assert(glsl_type_is_struct(val->ssa->type));
+      val->ssa->elems[0]->def = nir_imul(&b->nb, src[0], src[1]);
+      val->ssa->elems[1]->def = nir_umul_high(&b->nb, src[0], src[1]);
+      return;
+
+   case SpvOpSMulExtended:
+      assert(glsl_type_is_struct(val->ssa->type));
+      val->ssa->elems[0]->def = nir_imul(&b->nb, src[0], src[1]);
+      val->ssa->elems[1]->def = nir_imul_high(&b->nb, src[0], src[1]);
+      return;
+
+   case SpvOpFwidth:
+      val->ssa->def = nir_fadd(&b->nb,
+                               nir_fabs(&b->nb, nir_fddx(&b->nb, src[0])),
+                               nir_fabs(&b->nb, nir_fddx(&b->nb, src[1])));
+      return;
+   case SpvOpFwidthFine:
+      val->ssa->def = nir_fadd(&b->nb,
+                               nir_fabs(&b->nb, nir_fddx_fine(&b->nb, src[0])),
+                               nir_fabs(&b->nb, nir_fddx_fine(&b->nb, src[1])));
+      return;
+   case SpvOpFwidthCoarse:
+      val->ssa->def = nir_fadd(&b->nb,
+                               nir_fabs(&b->nb, nir_fddx_coarse(&b->nb, src[0])),
+                               nir_fabs(&b->nb, nir_fddx_coarse(&b->nb, src[1])));
+      return;
+
+   case SpvOpVectorTimesScalar:
+      /* The builder will take care of splatting for us. */
+      val->ssa->def = nir_fmul(&b->nb, src[0], src[1]);
+      return;
+
+   case SpvOpIsNan:
+      val->ssa->def = nir_fne(&b->nb, src[0], src[0]);
+      return;
+
+   case SpvOpIsInf:
+      val->ssa->def = nir_feq(&b->nb, nir_fabs(&b->nb, src[0]),
+                                      nir_imm_float(&b->nb, INFINITY));
+      return;
+
+   default: {
+      bool swap;
+      nir_op op = vtn_nir_alu_op_for_spirv_opcode(opcode, &swap);
+
+      if (swap) {
+         nir_ssa_def *tmp = src[0];
+         src[0] = src[1];
+         src[1] = tmp;
+      }
+
+      val->ssa->def = nir_build_alu(&b->nb, op, src[0], src[1], src[2], src[3]);
+      return;
+   } /* default */
+   }
+}
diff --git a/src/compiler/nir/spirv/vtn_cfg.c b/src/compiler/nir/spirv/vtn_cfg.c
new file mode 100644
index 00000000000..041408b1cfb
--- /dev/null
+++ b/src/compiler/nir/spirv/vtn_cfg.c
@@ -0,0 +1,768 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "vtn_private.h"
+#include "nir/nir_vla.h"
+
+static bool
+vtn_cfg_handle_prepass_instruction(struct vtn_builder *b, SpvOp opcode,
+                                   const uint32_t *w, unsigned count)
+{
+   switch (opcode) {
+   case SpvOpFunction: {
+      assert(b->func == NULL);
+      b->func = rzalloc(b, struct vtn_function);
+
+      list_inithead(&b->func->body);
+      b->func->control = w[3];
+
+      const struct glsl_type *result_type =
+         vtn_value(b, w[1], vtn_value_type_type)->type->type;
+      struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_function);
+      val->func = b->func;
+
+      const struct glsl_type *func_type =
+         vtn_value(b, w[4], vtn_value_type_type)->type->type;
+
+      assert(glsl_get_function_return_type(func_type) == result_type);
+
+      nir_function *func =
+         nir_function_create(b->shader, ralloc_strdup(b->shader, val->name));
+
+      func->num_params = glsl_get_length(func_type);
+      func->params = ralloc_array(b->shader, nir_parameter, func->num_params);
+      for (unsigned i = 0; i < func->num_params; i++) {
+         const struct glsl_function_param *param =
+            glsl_get_function_param(func_type, i);
+         func->params[i].type = param->type;
+         if (param->in) {
+            if (param->out) {
+               func->params[i].param_type = nir_parameter_inout;
+            } else {
+               func->params[i].param_type = nir_parameter_in;
+            }
+         } else {
+            if (param->out) {
+               func->params[i].param_type = nir_parameter_out;
+            } else {
+               assert(!"Parameter is neither in nor out");
+            }
+         }
+      }
+
+      func->return_type = glsl_get_function_return_type(func_type);
+
+      b->func->impl = nir_function_impl_create(func);
+      if (!glsl_type_is_void(func->return_type)) {
+         b->func->impl->return_var =
+            nir_local_variable_create(b->func->impl, func->return_type, "ret");
+      }
+
+      b->func_param_idx = 0;
+      break;
+   }
+
+   case SpvOpFunctionEnd:
+      b->func->end = w;
+      b->func = NULL;
+      break;
+
+   case SpvOpFunctionParameter: {
+      struct vtn_value *val =
+         vtn_push_value(b, w[2], vtn_value_type_access_chain);
+
+      assert(b->func_param_idx < b->func->impl->num_params);
+      unsigned idx = b->func_param_idx++;
+
+      nir_variable *param =
+         nir_local_variable_create(b->func->impl,
+                                   b->func->impl->function->params[idx].type,
+                                   val->name);
+      b->func->impl->params[idx] = param;
+
+      struct vtn_variable *vtn_var = rzalloc(b, struct vtn_variable);
+      vtn_var->mode = vtn_variable_mode_param;
+      vtn_var->type = vtn_value(b, w[1], vtn_value_type_type)->type;
+      vtn_var->var = param;
+      vtn_var->chain.var = vtn_var;
+      vtn_var->chain.length = 0;
+
+      val->access_chain = &vtn_var->chain;
+      break;
+   }
+
+   case SpvOpLabel: {
+      assert(b->block == NULL);
+      b->block = rzalloc(b, struct vtn_block);
+      b->block->node.type = vtn_cf_node_type_block;
+      b->block->label = w;
+      vtn_push_value(b, w[1], vtn_value_type_block)->block = b->block;
+
+      if (b->func->start_block == NULL) {
+         /* This is the first block encountered for this function.  In this
+          * case, we set the start block and add it to the list of
+          * implemented functions that we'll walk later.
+          */
+         b->func->start_block = b->block;
+         exec_list_push_tail(&b->functions, &b->func->node);
+      }
+      break;
+   }
+
+   case SpvOpSelectionMerge:
+   case SpvOpLoopMerge:
+      assert(b->block && b->block->merge == NULL);
+      b->block->merge = w;
+      break;
+
+   case SpvOpBranch:
+   case SpvOpBranchConditional:
+   case SpvOpSwitch:
+   case SpvOpKill:
+   case SpvOpReturn:
+   case SpvOpReturnValue:
+   case SpvOpUnreachable:
+      assert(b->block && b->block->branch == NULL);
+      b->block->branch = w;
+      b->block = NULL;
+      break;
+
+   default:
+      /* Continue on as per normal */
+      return true;
+   }
+
+   return true;
+}
+
+static void
+vtn_add_case(struct vtn_builder *b, struct vtn_switch *swtch,
+             struct vtn_block *break_block,
+             uint32_t block_id, uint32_t val, bool is_default)
+{
+   struct vtn_block *case_block =
+      vtn_value(b, block_id, vtn_value_type_block)->block;
+
+   /* Don't create dummy cases that just break */
+   if (case_block == break_block)
+      return;
+
+   if (case_block->switch_case == NULL) {
+      struct vtn_case *c = ralloc(b, struct vtn_case);
+
+      list_inithead(&c->body);
+      c->start_block = case_block;
+      c->fallthrough = NULL;
+      nir_array_init(&c->values, b);
+      c->is_default = false;
+      c->visited = false;
+
+      list_addtail(&c->link, &swtch->cases);
+
+      case_block->switch_case = c;
+   }
+
+   if (is_default) {
+      case_block->switch_case->is_default = true;
+   } else {
+      nir_array_add(&case_block->switch_case->values, uint32_t, val);
+   }
+}
+
+/* This function performs a depth-first search of the cases and puts them
+ * in fall-through order.
+ */
+static void
+vtn_order_case(struct vtn_switch *swtch, struct vtn_case *cse)
+{
+   if (cse->visited)
+      return;
+
+   cse->visited = true;
+
+   list_del(&cse->link);
+
+   if (cse->fallthrough) {
+      vtn_order_case(swtch, cse->fallthrough);
+
+      /* If we have a fall-through, place this case right before the case it
+       * falls through to.  This ensures that fallthroughs come one after
+       * the other.  These two can never get separated because that would
+       * imply something else falling through to the same case.  Also, this
+       * can't break ordering because the DFS ensures that this case is
+       * visited before anything that falls through to it.
+       */
+      list_addtail(&cse->link, &cse->fallthrough->link);
+   } else {
+      list_add(&cse->link, &swtch->cases);
+   }
+}
+
+static enum vtn_branch_type
+vtn_get_branch_type(struct vtn_block *block,
+                    struct vtn_case *swcase, struct vtn_block *switch_break,
+                    struct vtn_block *loop_break, struct vtn_block *loop_cont)
+{
+   if (block->switch_case) {
+      /* This branch is actually a fallthrough */
+      assert(swcase->fallthrough == NULL ||
+             swcase->fallthrough == block->switch_case);
+      swcase->fallthrough = block->switch_case;
+      return vtn_branch_type_switch_fallthrough;
+   } else if (block == switch_break) {
+      return vtn_branch_type_switch_break;
+   } else if (block == loop_break) {
+      return vtn_branch_type_loop_break;
+   } else if (block == loop_cont) {
+      return vtn_branch_type_loop_continue;
+   } else {
+      return vtn_branch_type_none;
+   }
+}
+
+static void
+vtn_cfg_walk_blocks(struct vtn_builder *b, struct list_head *cf_list,
+                    struct vtn_block *start, struct vtn_case *switch_case,
+                    struct vtn_block *switch_break,
+                    struct vtn_block *loop_break, struct vtn_block *loop_cont,
+                    struct vtn_block *end)
+{
+   struct vtn_block *block = start;
+   while (block != end) {
+      if (block->merge && (*block->merge & SpvOpCodeMask) == SpvOpLoopMerge &&
+          !block->loop) {
+         struct vtn_loop *loop = ralloc(b, struct vtn_loop);
+
+         loop->node.type = vtn_cf_node_type_loop;
+         list_inithead(&loop->body);
+         list_inithead(&loop->cont_body);
+         loop->control = block->merge[3];
+
+         list_addtail(&loop->node.link, cf_list);
+         block->loop = loop;
+
+         struct vtn_block *new_loop_break =
+            vtn_value(b, block->merge[1], vtn_value_type_block)->block;
+         struct vtn_block *new_loop_cont =
+            vtn_value(b, block->merge[2], vtn_value_type_block)->block;
+
+         /* Note: This recursive call will start with the current block as
+          * its start block.  If we weren't careful, we would get here
+          * again and end up in infinite recursion.  This is why we set
+          * block->loop above and check for it before creating one.  This
+          * way, we only create the loop once and the second call that
+          * tries to handle this loop goes to the cases below and gets
+          * handled as a regular block.
+          *
+          * Note: When we make the recursive walk calls, we pass NULL for
+          * the switch break since you have to break out of the loop first.
+          * We do, however, still pass the current switch case because it's
+          * possible that the merge block for the loop is the start of
+          * another case.
+          */
+         vtn_cfg_walk_blocks(b, &loop->body, block, switch_case, NULL,
+                             new_loop_break, new_loop_cont, NULL );
+         vtn_cfg_walk_blocks(b, &loop->cont_body, new_loop_cont, NULL, NULL,
+                             new_loop_break, NULL, block);
+
+         block = new_loop_break;
+         continue;
+      }
+
+      assert(block->node.link.next == NULL);
+      list_addtail(&block->node.link, cf_list);
+
+      switch (*block->branch & SpvOpCodeMask) {
+      case SpvOpBranch: {
+         struct vtn_block *branch_block =
+            vtn_value(b, block->branch[1], vtn_value_type_block)->block;
+
+         block->branch_type = vtn_get_branch_type(branch_block,
+                                                  switch_case, switch_break,
+                                                  loop_break, loop_cont);
+
+         if (block->branch_type != vtn_branch_type_none)
+            return;
+
+         block = branch_block;
+         continue;
+      }
+
+      case SpvOpReturn:
+      case SpvOpReturnValue:
+         block->branch_type = vtn_branch_type_return;
+         return;
+
+      case SpvOpKill:
+         block->branch_type = vtn_branch_type_discard;
+         return;
+
+      case SpvOpBranchConditional: {
+         struct vtn_block *then_block =
+            vtn_value(b, block->branch[2], vtn_value_type_block)->block;
+         struct vtn_block *else_block =
+            vtn_value(b, block->branch[3], vtn_value_type_block)->block;
+
+         struct vtn_if *if_stmt = ralloc(b, struct vtn_if);
+
+         if_stmt->node.type = vtn_cf_node_type_if;
+         if_stmt->condition = block->branch[1];
+         list_inithead(&if_stmt->then_body);
+         list_inithead(&if_stmt->else_body);
+
+         list_addtail(&if_stmt->node.link, cf_list);
+
+         if (block->merge &&
+             (*block->merge & SpvOpCodeMask) == SpvOpSelectionMerge) {
+            if_stmt->control = block->merge[2];
+         }
+
+         if_stmt->then_type = vtn_get_branch_type(then_block,
+                                                  switch_case, switch_break,
+                                                  loop_break, loop_cont);
+         if_stmt->else_type = vtn_get_branch_type(else_block,
+                                                  switch_case, switch_break,
+                                                  loop_break, loop_cont);
+
+         if (if_stmt->then_type == vtn_branch_type_none &&
+             if_stmt->else_type == vtn_branch_type_none) {
+            /* Neither side of the if is something we can short-circuit. */
+            assert((*block->merge & SpvOpCodeMask) == SpvOpSelectionMerge);
+            struct vtn_block *merge_block =
+               vtn_value(b, block->merge[1], vtn_value_type_block)->block;
+
+            vtn_cfg_walk_blocks(b, &if_stmt->then_body, then_block,
+                                switch_case, switch_break,
+                                loop_break, loop_cont, merge_block);
+            vtn_cfg_walk_blocks(b, &if_stmt->else_body, else_block,
+                                switch_case, switch_break,
+                                loop_break, loop_cont, merge_block);
+
+            enum vtn_branch_type merge_type =
+               vtn_get_branch_type(merge_block, switch_case, switch_break,
+                                   loop_break, loop_cont);
+            if (merge_type == vtn_branch_type_none) {
+               block = merge_block;
+               continue;
+            } else {
+               return;
+            }
+         } else if (if_stmt->then_type != vtn_branch_type_none &&
+                    if_stmt->else_type != vtn_branch_type_none) {
+            /* Both sides were short-circuited.  We're done here. */
+            return;
+         } else {
+            /* Exeactly one side of the branch could be short-circuited.
+             * We set the branch up as a predicated break/continue and we
+             * continue on with the other side as if it were what comes
+             * after the if.
+             */
+            if (if_stmt->then_type == vtn_branch_type_none) {
+               block = then_block;
+            } else {
+               block = else_block;
+            }
+            continue;
+         }
+         unreachable("Should have returned or continued");
+      }
+
+      case SpvOpSwitch: {
+         assert((*block->merge & SpvOpCodeMask) == SpvOpSelectionMerge);
+         struct vtn_block *break_block =
+            vtn_value(b, block->merge[1], vtn_value_type_block)->block;
+
+         struct vtn_switch *swtch = ralloc(b, struct vtn_switch);
+
+         swtch->node.type = vtn_cf_node_type_switch;
+         swtch->selector = block->branch[1];
+         list_inithead(&swtch->cases);
+
+         list_addtail(&swtch->node.link, cf_list);
+
+         /* First, we go through and record all of the cases. */
+         const uint32_t *branch_end =
+            block->branch + (block->branch[0] >> SpvWordCountShift);
+
+         vtn_add_case(b, swtch, break_block, block->branch[2], 0, true);
+         for (const uint32_t *w = block->branch + 3; w < branch_end; w += 2)
+            vtn_add_case(b, swtch, break_block, w[1], w[0], false);
+
+         /* Now, we go through and walk the blocks.  While we walk through
+          * the blocks, we also gather the much-needed fall-through
+          * information.
+          */
+         list_for_each_entry(struct vtn_case, cse, &swtch->cases, link) {
+            assert(cse->start_block != break_block);
+            vtn_cfg_walk_blocks(b, &cse->body, cse->start_block, cse,
+                                break_block, NULL, loop_cont, NULL);
+         }
+
+         /* Finally, we walk over all of the cases one more time and put
+          * them in fall-through order.
+          */
+         for (const uint32_t *w = block->branch + 2; w < branch_end; w += 2) {
+            struct vtn_block *case_block =
+               vtn_value(b, *w, vtn_value_type_block)->block;
+
+            if (case_block == break_block)
+               continue;
+
+            assert(case_block->switch_case);
+
+            vtn_order_case(swtch, case_block->switch_case);
+         }
+
+         block = break_block;
+         continue;
+      }
+
+      case SpvOpUnreachable:
+         return;
+
+      default:
+         unreachable("Unhandled opcode");
+      }
+   }
+}
+
+void
+vtn_build_cfg(struct vtn_builder *b, const uint32_t *words, const uint32_t *end)
+{
+   vtn_foreach_instruction(b, words, end,
+                           vtn_cfg_handle_prepass_instruction);
+
+   foreach_list_typed(struct vtn_function, func, node, &b->functions) {
+      vtn_cfg_walk_blocks(b, &func->body, func->start_block,
+                          NULL, NULL, NULL, NULL, NULL);
+   }
+}
+
+static bool
+vtn_handle_phis_first_pass(struct vtn_builder *b, SpvOp opcode,
+                           const uint32_t *w, unsigned count)
+{
+   if (opcode == SpvOpLabel)
+      return true; /* Nothing to do */
+
+   /* If this isn't a phi node, stop. */
+   if (opcode != SpvOpPhi)
+      return false;
+
+   /* For handling phi nodes, we do a poor-man's out-of-ssa on the spot.
+    * For each phi, we create a variable with the appropreate type and
+    * do a load from that variable.  Then, in a second pass, we add
+    * stores to that variable to each of the predecessor blocks.
+    *
+    * We could do something more intelligent here.  However, in order to
+    * handle loops and things properly, we really need dominance
+    * information.  It would end up basically being the into-SSA
+    * algorithm all over again.  It's easier if we just let
+    * lower_vars_to_ssa do that for us instead of repeating it here.
+    */
+   struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_ssa);
+
+   struct vtn_type *type = vtn_value(b, w[1], vtn_value_type_type)->type;
+   nir_variable *phi_var =
+      nir_local_variable_create(b->nb.impl, type->type, "phi");
+   _mesa_hash_table_insert(b->phi_table, w, phi_var);
+
+   val->ssa = vtn_local_load(b, nir_deref_var_create(b, phi_var));
+
+   return true;
+}
+
+static bool
+vtn_handle_phi_second_pass(struct vtn_builder *b, SpvOp opcode,
+                           const uint32_t *w, unsigned count)
+{
+   if (opcode != SpvOpPhi)
+      return true;
+
+   struct hash_entry *phi_entry = _mesa_hash_table_search(b->phi_table, w);
+   assert(phi_entry);
+   nir_variable *phi_var = phi_entry->data;
+
+   for (unsigned i = 3; i < count; i += 2) {
+      struct vtn_ssa_value *src = vtn_ssa_value(b, w[i]);
+      struct vtn_block *pred =
+         vtn_value(b, w[i + 1], vtn_value_type_block)->block;
+
+      b->nb.cursor = nir_after_block_before_jump(pred->end_block);
+
+      vtn_local_store(b, src, nir_deref_var_create(b, phi_var));
+   }
+
+   return true;
+}
+
+static void
+vtn_emit_branch(struct vtn_builder *b, enum vtn_branch_type branch_type,
+                nir_variable *switch_fall_var, bool *has_switch_break)
+{
+   switch (branch_type) {
+   case vtn_branch_type_switch_break:
+      nir_store_var(&b->nb, switch_fall_var, nir_imm_int(&b->nb, NIR_FALSE), 1);
+      *has_switch_break = true;
+      break;
+   case vtn_branch_type_switch_fallthrough:
+      break; /* Nothing to do */
+   case vtn_branch_type_loop_break:
+      nir_jump(&b->nb, nir_jump_break);
+      break;
+   case vtn_branch_type_loop_continue:
+      nir_jump(&b->nb, nir_jump_continue);
+      break;
+   case vtn_branch_type_return:
+      nir_jump(&b->nb, nir_jump_return);
+      break;
+   case vtn_branch_type_discard: {
+      nir_intrinsic_instr *discard =
+         nir_intrinsic_instr_create(b->nb.shader, nir_intrinsic_discard);
+      nir_builder_instr_insert(&b->nb, &discard->instr);
+      break;
+   }
+   default:
+      unreachable("Invalid branch type");
+   }
+}
+
+static void
+vtn_emit_cf_list(struct vtn_builder *b, struct list_head *cf_list,
+                 nir_variable *switch_fall_var, bool *has_switch_break,
+                 vtn_instruction_handler handler)
+{
+   list_for_each_entry(struct vtn_cf_node, node, cf_list, link) {
+      switch (node->type) {
+      case vtn_cf_node_type_block: {
+         struct vtn_block *block = (struct vtn_block *)node;
+
+         const uint32_t *block_start = block->label;
+         const uint32_t *block_end = block->merge ? block->merge :
+                                                    block->branch;
+
+         block_start = vtn_foreach_instruction(b, block_start, block_end,
+                                               vtn_handle_phis_first_pass);
+
+         vtn_foreach_instruction(b, block_start, block_end, handler);
+
+         block->end_block = nir_cursor_current_block(b->nb.cursor);
+
+         if ((*block->branch & SpvOpCodeMask) == SpvOpReturnValue) {
+            struct vtn_ssa_value *src = vtn_ssa_value(b, block->branch[1]);
+            vtn_local_store(b, src,
+                            nir_deref_var_create(b, b->impl->return_var));
+         }
+
+         if (block->branch_type != vtn_branch_type_none) {
+            vtn_emit_branch(b, block->branch_type,
+                            switch_fall_var, has_switch_break);
+         }
+
+         break;
+      }
+
+      case vtn_cf_node_type_if: {
+         struct vtn_if *vtn_if = (struct vtn_if *)node;
+
+         nir_if *if_stmt = nir_if_create(b->shader);
+         if_stmt->condition =
+            nir_src_for_ssa(vtn_ssa_value(b, vtn_if->condition)->def);
+         nir_cf_node_insert(b->nb.cursor, &if_stmt->cf_node);
+
+         bool sw_break = false;
+
+         b->nb.cursor = nir_after_cf_list(&if_stmt->then_list);
+         if (vtn_if->then_type == vtn_branch_type_none) {
+            vtn_emit_cf_list(b, &vtn_if->then_body,
+                             switch_fall_var, &sw_break, handler);
+         } else {
+            vtn_emit_branch(b, vtn_if->then_type, switch_fall_var, &sw_break);
+         }
+
+         b->nb.cursor = nir_after_cf_list(&if_stmt->else_list);
+         if (vtn_if->else_type == vtn_branch_type_none) {
+            vtn_emit_cf_list(b, &vtn_if->else_body,
+                             switch_fall_var, &sw_break, handler);
+         } else {
+            vtn_emit_branch(b, vtn_if->else_type, switch_fall_var, &sw_break);
+         }
+
+         b->nb.cursor = nir_after_cf_node(&if_stmt->cf_node);
+
+         /* If we encountered a switch break somewhere inside of the if,
+          * then it would have been handled correctly by calling
+          * emit_cf_list or emit_branch for the interrior.  However, we
+          * need to predicate everything following on wether or not we're
+          * still going.
+          */
+         if (sw_break) {
+            *has_switch_break = true;
+
+            nir_if *switch_if = nir_if_create(b->shader);
+            switch_if->condition =
+               nir_src_for_ssa(nir_load_var(&b->nb, switch_fall_var));
+            nir_cf_node_insert(b->nb.cursor, &switch_if->cf_node);
+
+            b->nb.cursor = nir_after_cf_list(&if_stmt->then_list);
+         }
+         break;
+      }
+
+      case vtn_cf_node_type_loop: {
+         struct vtn_loop *vtn_loop = (struct vtn_loop *)node;
+
+         nir_loop *loop = nir_loop_create(b->shader);
+         nir_cf_node_insert(b->nb.cursor, &loop->cf_node);
+
+         b->nb.cursor = nir_after_cf_list(&loop->body);
+         vtn_emit_cf_list(b, &vtn_loop->body, NULL, NULL, handler);
+
+         if (!list_empty(&vtn_loop->cont_body)) {
+            /* If we have a non-trivial continue body then we need to put
+             * it at the beginning of the loop with a flag to ensure that
+             * it doesn't get executed in the first iteration.
+             */
+            nir_variable *do_cont =
+               nir_local_variable_create(b->nb.impl, glsl_bool_type(), "cont");
+
+            b->nb.cursor = nir_before_cf_node(&loop->cf_node);
+            nir_store_var(&b->nb, do_cont, nir_imm_int(&b->nb, NIR_FALSE), 1);
+
+            b->nb.cursor = nir_before_cf_list(&loop->body);
+            nir_if *cont_if = nir_if_create(b->shader);
+            cont_if->condition = nir_src_for_ssa(nir_load_var(&b->nb, do_cont));
+            nir_cf_node_insert(b->nb.cursor, &cont_if->cf_node);
+
+            b->nb.cursor = nir_after_cf_list(&cont_if->then_list);
+            vtn_emit_cf_list(b, &vtn_loop->cont_body, NULL, NULL, handler);
+
+            b->nb.cursor = nir_after_cf_node(&cont_if->cf_node);
+            nir_store_var(&b->nb, do_cont, nir_imm_int(&b->nb, NIR_TRUE), 1);
+
+            b->has_loop_continue = true;
+         }
+
+         b->nb.cursor = nir_after_cf_node(&loop->cf_node);
+         break;
+      }
+
+      case vtn_cf_node_type_switch: {
+         struct vtn_switch *vtn_switch = (struct vtn_switch *)node;
+
+         /* First, we create a variable to keep track of whether or not the
+          * switch is still going at any given point.  Any switch breaks
+          * will set this variable to false.
+          */
+         nir_variable *fall_var =
+            nir_local_variable_create(b->nb.impl, glsl_bool_type(), "fall");
+         nir_store_var(&b->nb, fall_var, nir_imm_int(&b->nb, NIR_FALSE), 1);
+
+         /* Next, we gather up all of the conditions.  We have to do this
+          * up-front because we also need to build an "any" condition so
+          * that we can use !any for default.
+          */
+         const int num_cases = list_length(&vtn_switch->cases);
+         NIR_VLA(nir_ssa_def *, conditions, num_cases);
+
+         nir_ssa_def *sel = vtn_ssa_value(b, vtn_switch->selector)->def;
+         /* An accumulation of all conditions.  Used for the default */
+         nir_ssa_def *any = NULL;
+
+         int i = 0;
+         list_for_each_entry(struct vtn_case, cse, &vtn_switch->cases, link) {
+            if (cse->is_default) {
+               conditions[i++] = NULL;
+               continue;
+            }
+
+            nir_ssa_def *cond = NULL;
+            nir_array_foreach(&cse->values, uint32_t, val) {
+               nir_ssa_def *is_val =
+                  nir_ieq(&b->nb, sel, nir_imm_int(&b->nb, *val));
+
+               cond = cond ? nir_ior(&b->nb, cond, is_val) : is_val;
+            }
+
+            any = any ? nir_ior(&b->nb, any, cond) : cond;
+            conditions[i++] = cond;
+         }
+         assert(i == num_cases);
+
+         /* Now we can walk the list of cases and actually emit code */
+         i = 0;
+         list_for_each_entry(struct vtn_case, cse, &vtn_switch->cases, link) {
+            /* Figure out the condition */
+            nir_ssa_def *cond = conditions[i++];
+            if (cse->is_default) {
+               assert(cond == NULL);
+               cond = nir_inot(&b->nb, any);
+            }
+            /* Take fallthrough into account */
+            cond = nir_ior(&b->nb, cond, nir_load_var(&b->nb, fall_var));
+
+            nir_if *case_if = nir_if_create(b->nb.shader);
+            case_if->condition = nir_src_for_ssa(cond);
+            nir_cf_node_insert(b->nb.cursor, &case_if->cf_node);
+
+            bool has_break = false;
+            b->nb.cursor = nir_after_cf_list(&case_if->then_list);
+            nir_store_var(&b->nb, fall_var, nir_imm_int(&b->nb, NIR_TRUE), 1);
+            vtn_emit_cf_list(b, &cse->body, fall_var, &has_break, handler);
+            (void)has_break; /* We don't care */
+
+            b->nb.cursor = nir_after_cf_node(&case_if->cf_node);
+         }
+         assert(i == num_cases);
+
+         break;
+      }
+
+      default:
+         unreachable("Invalid CF node type");
+      }
+   }
+}
+
+void
+vtn_function_emit(struct vtn_builder *b, struct vtn_function *func,
+                  vtn_instruction_handler instruction_handler)
+{
+   nir_builder_init(&b->nb, func->impl);
+   b->nb.cursor = nir_after_cf_list(&func->impl->body);
+   b->has_loop_continue = false;
+   b->phi_table = _mesa_hash_table_create(b, _mesa_hash_pointer,
+                                          _mesa_key_pointer_equal);
+
+   vtn_emit_cf_list(b, &func->body, NULL, NULL, instruction_handler);
+
+   vtn_foreach_instruction(b, func->start_block->label, func->end,
+                           vtn_handle_phi_second_pass);
+
+   /* Continue blocks for loops get inserted before the body of the loop
+    * but instructions in the continue may use SSA defs in the loop body.
+    * Therefore, we need to repair SSA to insert the needed phi nodes.
+    */
+   if (b->has_loop_continue)
+      nir_repair_ssa_impl(func->impl);
+}
diff --git a/src/compiler/nir/spirv/vtn_glsl450.c b/src/compiler/nir/spirv/vtn_glsl450.c
new file mode 100644
index 00000000000..bc38aa4b1be
--- /dev/null
+++ b/src/compiler/nir/spirv/vtn_glsl450.c
@@ -0,0 +1,684 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "vtn_private.h"
+#include "GLSL.std.450.h"
+
+#define M_PIf   ((float) M_PI)
+#define M_PI_2f ((float) M_PI_2)
+#define M_PI_4f ((float) M_PI_4)
+
+static nir_ssa_def *
+build_mat2_det(nir_builder *b, nir_ssa_def *col[2])
+{
+   unsigned swiz[4] = {1, 0, 0, 0};
+   nir_ssa_def *p = nir_fmul(b, col[0], nir_swizzle(b, col[1], swiz, 2, true));
+   return nir_fsub(b, nir_channel(b, p, 0), nir_channel(b, p, 1));
+}
+
+static nir_ssa_def *
+build_mat3_det(nir_builder *b, nir_ssa_def *col[3])
+{
+   unsigned yzx[4] = {1, 2, 0, 0};
+   unsigned zxy[4] = {2, 0, 1, 0};
+
+   nir_ssa_def *prod0 =
+      nir_fmul(b, col[0],
+               nir_fmul(b, nir_swizzle(b, col[1], yzx, 3, true),
+                           nir_swizzle(b, col[2], zxy, 3, true)));
+   nir_ssa_def *prod1 =
+      nir_fmul(b, col[0],
+               nir_fmul(b, nir_swizzle(b, col[1], zxy, 3, true),
+                           nir_swizzle(b, col[2], yzx, 3, true)));
+
+   nir_ssa_def *diff = nir_fsub(b, prod0, prod1);
+
+   return nir_fadd(b, nir_channel(b, diff, 0),
+                      nir_fadd(b, nir_channel(b, diff, 1),
+                                  nir_channel(b, diff, 2)));
+}
+
+static nir_ssa_def *
+build_mat4_det(nir_builder *b, nir_ssa_def **col)
+{
+   nir_ssa_def *subdet[4];
+   for (unsigned i = 0; i < 4; i++) {
+      unsigned swiz[3];
+      for (unsigned j = 0, k = 0; j < 3; j++, k++) {
+         if (k == i)
+            k++; /* skip column */
+         swiz[j] = k;
+      }
+
+      nir_ssa_def *subcol[3];
+      subcol[0] = nir_swizzle(b, col[1], swiz, 3, true);
+      subcol[1] = nir_swizzle(b, col[2], swiz, 3, true);
+      subcol[2] = nir_swizzle(b, col[3], swiz, 3, true);
+
+      subdet[i] = build_mat3_det(b, subcol);
+   }
+
+   nir_ssa_def *prod = nir_fmul(b, col[0], nir_vec(b, subdet, 4));
+
+   return nir_fadd(b, nir_fsub(b, nir_channel(b, prod, 0),
+                                  nir_channel(b, prod, 1)),
+                      nir_fsub(b, nir_channel(b, prod, 2),
+                                  nir_channel(b, prod, 3)));
+}
+
+static nir_ssa_def *
+build_mat_det(struct vtn_builder *b, struct vtn_ssa_value *src)
+{
+   unsigned size = glsl_get_vector_elements(src->type);
+
+   nir_ssa_def *cols[4];
+   for (unsigned i = 0; i < size; i++)
+      cols[i] = src->elems[i]->def;
+
+   switch(size) {
+   case 2: return build_mat2_det(&b->nb, cols);
+   case 3: return build_mat3_det(&b->nb, cols);
+   case 4: return build_mat4_det(&b->nb, cols);
+   default:
+      unreachable("Invalid matrix size");
+   }
+}
+
+/* Computes the determinate of the submatrix given by taking src and
+ * removing the specified row and column.
+ */
+static nir_ssa_def *
+build_mat_subdet(struct nir_builder *b, struct vtn_ssa_value *src,
+                 unsigned size, unsigned row, unsigned col)
+{
+   assert(row < size && col < size);
+   if (size == 2) {
+      return nir_channel(b, src->elems[1 - col]->def, 1 - row);
+   } else {
+      /* Swizzle to get all but the specified row */
+      unsigned swiz[3];
+      for (unsigned j = 0; j < 4; j++)
+         swiz[j - (j > row)] = j;
+
+      /* Grab all but the specified column */
+      nir_ssa_def *subcol[3];
+      for (unsigned j = 0; j < size; j++) {
+         if (j != col) {
+            subcol[j - (j > col)] = nir_swizzle(b, src->elems[j]->def,
+                                                swiz, size - 1, true);
+         }
+      }
+
+      if (size == 3) {
+         return build_mat2_det(b, subcol);
+      } else {
+         assert(size == 4);
+         return build_mat3_det(b, subcol);
+      }
+   }
+}
+
+static struct vtn_ssa_value *
+matrix_inverse(struct vtn_builder *b, struct vtn_ssa_value *src)
+{
+   nir_ssa_def *adj_col[4];
+   unsigned size = glsl_get_vector_elements(src->type);
+
+   /* Build up an adjugate matrix */
+   for (unsigned c = 0; c < size; c++) {
+      nir_ssa_def *elem[4];
+      for (unsigned r = 0; r < size; r++) {
+         elem[r] = build_mat_subdet(&b->nb, src, size, c, r);
+
+         if ((r + c) % 2)
+            elem[r] = nir_fneg(&b->nb, elem[r]);
+      }
+
+      adj_col[c] = nir_vec(&b->nb, elem, size);
+   }
+
+   nir_ssa_def *det_inv = nir_frcp(&b->nb, build_mat_det(b, src));
+
+   struct vtn_ssa_value *val = vtn_create_ssa_value(b, src->type);
+   for (unsigned i = 0; i < size; i++)
+      val->elems[i]->def = nir_fmul(&b->nb, adj_col[i], det_inv);
+
+   return val;
+}
+
+static nir_ssa_def*
+build_length(nir_builder *b, nir_ssa_def *vec)
+{
+   switch (vec->num_components) {
+   case 1: return nir_fsqrt(b, nir_fmul(b, vec, vec));
+   case 2: return nir_fsqrt(b, nir_fdot2(b, vec, vec));
+   case 3: return nir_fsqrt(b, nir_fdot3(b, vec, vec));
+   case 4: return nir_fsqrt(b, nir_fdot4(b, vec, vec));
+   default:
+      unreachable("Invalid number of components");
+   }
+}
+
+static inline nir_ssa_def *
+build_fclamp(nir_builder *b,
+             nir_ssa_def *x, nir_ssa_def *min_val, nir_ssa_def *max_val)
+{
+   return nir_fmin(b, nir_fmax(b, x, min_val), max_val);
+}
+
+/**
+ * Return e^x.
+ */
+static nir_ssa_def *
+build_exp(nir_builder *b, nir_ssa_def *x)
+{
+   return nir_fexp2(b, nir_fmul(b, x, nir_imm_float(b, M_LOG2E)));
+}
+
+/**
+ * Return ln(x) - the natural logarithm of x.
+ */
+static nir_ssa_def *
+build_log(nir_builder *b, nir_ssa_def *x)
+{
+   return nir_fmul(b, nir_flog2(b, x), nir_imm_float(b, 1.0 / M_LOG2E));
+}
+
+static nir_ssa_def *
+build_asin(nir_builder *b, nir_ssa_def *x)
+{
+   /*
+    * asin(x) = sign(x) * (pi/2 - sqrt(1 - |x|) * (pi / 4 - 1 + |x| * (0.086566724 + |x| * -0.03102955)))
+    */
+   nir_ssa_def *abs_x = nir_fabs(b, x);
+   return nir_fmul(b, nir_fsign(b, x),
+                   nir_fsub(b, nir_imm_float(b, M_PI_2f),
+                            nir_fmul(b, nir_fsqrt(b, nir_fsub(b, nir_imm_float(b, 1.0f), abs_x)),
+                                     nir_fadd(b, nir_imm_float(b, M_PI_2f),
+                                              nir_fmul(b, abs_x,
+                                                       nir_fadd(b, nir_imm_float(b, M_PI_4f - 1.0f),
+                                                                nir_fmul(b, abs_x,
+                                                                         nir_fadd(b, nir_imm_float(b, 0.086566724f),
+                                                                                  nir_fmul(b, abs_x,
+                                                                                           nir_imm_float(b, -0.03102955f))))))))));
+}
+
+static nir_ssa_def *
+build_acos(nir_builder *b, nir_ssa_def *x)
+{
+   /*
+    * poly(x) = sign(x) * sqrt(1 - |x|) * (pi / 2 + |x| * (pi / 4 - 1 + |x| * (0.08132463 + |x| * -0.02363318)))
+    */
+   nir_ssa_def *abs_x = nir_fabs(b, x);
+   nir_ssa_def *poly = nir_fmul(b, nir_fsqrt(b, nir_fsub(b, nir_imm_float(b, 1.0f), abs_x)),
+                                nir_fadd(b, nir_imm_float(b, M_PI_2f),
+                                         nir_fmul(b, abs_x,
+                                                  nir_fadd(b, nir_imm_float(b, M_PI_4f - 1.0f),
+                                                           nir_fmul(b, abs_x,
+                                                                    nir_fadd(b, nir_imm_float(b, 0.08132463f),
+                                                                             nir_fmul(b, abs_x,
+                                                                                      nir_imm_float(b, -0.02363318f))))))));
+   return nir_bcsel(b, nir_flt(b, x, nir_imm_float(b, 0)),
+                       nir_fsub(b, nir_imm_float(b, M_PI), poly),
+                       poly);
+}
+
+/**
+ * Compute xs[0] + xs[1] + xs[2] + ... using fadd.
+ */
+static nir_ssa_def *
+build_fsum(nir_builder *b, nir_ssa_def **xs, int terms)
+{
+   nir_ssa_def *accum = xs[0];
+
+   for (int i = 1; i < terms; i++)
+      accum = nir_fadd(b, accum, xs[i]);
+
+   return accum;
+}
+
+static nir_ssa_def *
+build_atan(nir_builder *b, nir_ssa_def *y_over_x)
+{
+   nir_ssa_def *abs_y_over_x = nir_fabs(b, y_over_x);
+   nir_ssa_def *one = nir_imm_float(b, 1.0f);
+
+   /*
+    * range-reduction, first step:
+    *
+    *      / y_over_x         if |y_over_x| <= 1.0;
+    * x = <
+    *      \ 1.0 / y_over_x   otherwise
+    */
+   nir_ssa_def *x = nir_fdiv(b, nir_fmin(b, abs_y_over_x, one),
+                                nir_fmax(b, abs_y_over_x, one));
+
+   /*
+    * approximate atan by evaluating polynomial:
+    *
+    * x   * 0.9999793128310355 - x^3  * 0.3326756418091246 +
+    * x^5 * 0.1938924977115610 - x^7  * 0.1173503194786851 +
+    * x^9 * 0.0536813784310406 - x^11 * 0.0121323213173444
+    */
+   nir_ssa_def *x_2  = nir_fmul(b, x,   x);
+   nir_ssa_def *x_3  = nir_fmul(b, x_2, x);
+   nir_ssa_def *x_5  = nir_fmul(b, x_3, x_2);
+   nir_ssa_def *x_7  = nir_fmul(b, x_5, x_2);
+   nir_ssa_def *x_9  = nir_fmul(b, x_7, x_2);
+   nir_ssa_def *x_11 = nir_fmul(b, x_9, x_2);
+
+   nir_ssa_def *polynomial_terms[] = {
+      nir_fmul(b, x,    nir_imm_float(b,  0.9999793128310355f)),
+      nir_fmul(b, x_3,  nir_imm_float(b, -0.3326756418091246f)),
+      nir_fmul(b, x_5,  nir_imm_float(b,  0.1938924977115610f)),
+      nir_fmul(b, x_7,  nir_imm_float(b, -0.1173503194786851f)),
+      nir_fmul(b, x_9,  nir_imm_float(b,  0.0536813784310406f)),
+      nir_fmul(b, x_11, nir_imm_float(b, -0.0121323213173444f)),
+   };
+
+   nir_ssa_def *tmp =
+      build_fsum(b, polynomial_terms, ARRAY_SIZE(polynomial_terms));
+
+   /* range-reduction fixup */
+   tmp = nir_fadd(b, tmp,
+                  nir_fmul(b,
+                           nir_b2f(b, nir_flt(b, one, abs_y_over_x)),
+                           nir_fadd(b, nir_fmul(b, tmp,
+                                                nir_imm_float(b, -2.0f)),
+                                       nir_imm_float(b, M_PI_2f))));
+
+   /* sign fixup */
+   return nir_fmul(b, tmp, nir_fsign(b, y_over_x));
+}
+
+static nir_ssa_def *
+build_atan2(nir_builder *b, nir_ssa_def *y, nir_ssa_def *x)
+{
+   nir_ssa_def *zero = nir_imm_float(b, 0.0f);
+
+   /* If |x| >= 1.0e-8 * |y|: */
+   nir_ssa_def *condition =
+      nir_fge(b, nir_fabs(b, x),
+              nir_fmul(b, nir_imm_float(b, 1.0e-8f), nir_fabs(b, y)));
+
+   /* Then...call atan(y/x) and fix it up: */
+   nir_ssa_def *atan1 = build_atan(b, nir_fdiv(b, y, x));
+   nir_ssa_def *r_then =
+      nir_bcsel(b, nir_flt(b, x, zero),
+                   nir_fadd(b, atan1,
+                               nir_bcsel(b, nir_fge(b, y, zero),
+                                            nir_imm_float(b, M_PIf),
+                                            nir_imm_float(b, -M_PIf))),
+                   atan1);
+
+   /* Else... */
+   nir_ssa_def *r_else =
+      nir_fmul(b, nir_fsign(b, y), nir_imm_float(b, M_PI_2f));
+
+   return nir_bcsel(b, condition, r_then, r_else);
+}
+
+static nir_ssa_def *
+build_frexp(nir_builder *b, nir_ssa_def *x, nir_ssa_def **exponent)
+{
+   nir_ssa_def *abs_x = nir_fabs(b, x);
+   nir_ssa_def *zero = nir_imm_float(b, 0.0f);
+
+   /* Single-precision floating-point values are stored as
+    *   1 sign bit;
+    *   8 exponent bits;
+    *   23 mantissa bits.
+    *
+    * An exponent shift of 23 will shift the mantissa out, leaving only the
+    * exponent and sign bit (which itself may be zero, if the absolute value
+    * was taken before the bitcast and shift.
+    */
+   nir_ssa_def *exponent_shift = nir_imm_int(b, 23);
+   nir_ssa_def *exponent_bias = nir_imm_int(b, -126);
+
+   nir_ssa_def *sign_mantissa_mask = nir_imm_int(b, 0x807fffffu);
+
+   /* Exponent of floating-point values in the range [0.5, 1.0). */
+   nir_ssa_def *exponent_value = nir_imm_int(b, 0x3f000000u);
+
+   nir_ssa_def *is_not_zero = nir_fne(b, abs_x, zero);
+
+   *exponent =
+      nir_iadd(b, nir_ushr(b, abs_x, exponent_shift),
+                  nir_bcsel(b, is_not_zero, exponent_bias, zero));
+
+   return nir_ior(b, nir_iand(b, x, sign_mantissa_mask),
+                     nir_bcsel(b, is_not_zero, exponent_value, zero));
+}
+
+static void
+handle_glsl450_alu(struct vtn_builder *b, enum GLSLstd450 entrypoint,
+                   const uint32_t *w, unsigned count)
+{
+   struct nir_builder *nb = &b->nb;
+   const struct glsl_type *dest_type =
+      vtn_value(b, w[1], vtn_value_type_type)->type->type;
+
+   struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_ssa);
+   val->ssa = vtn_create_ssa_value(b, dest_type);
+
+   /* Collect the various SSA sources */
+   unsigned num_inputs = count - 5;
+   nir_ssa_def *src[3];
+   for (unsigned i = 0; i < num_inputs; i++)
+      src[i] = vtn_ssa_value(b, w[i + 5])->def;
+
+   nir_op op;
+   switch (entrypoint) {
+   case GLSLstd450Round:       op = nir_op_fround_even;   break; /* TODO */
+   case GLSLstd450RoundEven:   op = nir_op_fround_even;   break;
+   case GLSLstd450Trunc:       op = nir_op_ftrunc;        break;
+   case GLSLstd450FAbs:        op = nir_op_fabs;          break;
+   case GLSLstd450SAbs:        op = nir_op_iabs;          break;
+   case GLSLstd450FSign:       op = nir_op_fsign;         break;
+   case GLSLstd450SSign:       op = nir_op_isign;         break;
+   case GLSLstd450Floor:       op = nir_op_ffloor;        break;
+   case GLSLstd450Ceil:        op = nir_op_fceil;         break;
+   case GLSLstd450Fract:       op = nir_op_ffract;        break;
+   case GLSLstd450Radians:
+      val->ssa->def = nir_fmul(nb, src[0], nir_imm_float(nb, 0.01745329251));
+      return;
+   case GLSLstd450Degrees:
+      val->ssa->def = nir_fmul(nb, src[0], nir_imm_float(nb, 57.2957795131));
+      return;
+   case GLSLstd450Sin:         op = nir_op_fsin;       break;
+   case GLSLstd450Cos:         op = nir_op_fcos;       break;
+   case GLSLstd450Tan:
+      val->ssa->def = nir_fdiv(nb, nir_fsin(nb, src[0]),
+                               nir_fcos(nb, src[0]));
+      return;
+   case GLSLstd450Pow:         op = nir_op_fpow;       break;
+   case GLSLstd450Exp2:        op = nir_op_fexp2;      break;
+   case GLSLstd450Log2:        op = nir_op_flog2;      break;
+   case GLSLstd450Sqrt:        op = nir_op_fsqrt;      break;
+   case GLSLstd450InverseSqrt: op = nir_op_frsq;       break;
+
+   case GLSLstd450Modf: {
+      nir_ssa_def *sign = nir_fsign(nb, src[0]);
+      nir_ssa_def *abs = nir_fabs(nb, src[0]);
+      val->ssa->def = nir_fmul(nb, sign, nir_ffract(nb, abs));
+      nir_store_deref_var(nb, vtn_nir_deref(b, w[6]),
+                          nir_fmul(nb, sign, nir_ffloor(nb, abs)), 0xf);
+      return;
+   }
+
+   case GLSLstd450ModfStruct: {
+      nir_ssa_def *sign = nir_fsign(nb, src[0]);
+      nir_ssa_def *abs = nir_fabs(nb, src[0]);
+      assert(glsl_type_is_struct(val->ssa->type));
+      val->ssa->elems[0]->def = nir_fmul(nb, sign, nir_ffract(nb, abs));
+      val->ssa->elems[1]->def = nir_fmul(nb, sign, nir_ffloor(nb, abs));
+      return;
+   }
+
+   case GLSLstd450FMin:        op = nir_op_fmin;       break;
+   case GLSLstd450UMin:        op = nir_op_umin;       break;
+   case GLSLstd450SMin:        op = nir_op_imin;       break;
+   case GLSLstd450FMax:        op = nir_op_fmax;       break;
+   case GLSLstd450UMax:        op = nir_op_umax;       break;
+   case GLSLstd450SMax:        op = nir_op_imax;       break;
+   case GLSLstd450FMix:        op = nir_op_flrp;       break;
+   case GLSLstd450Step:
+      val->ssa->def = nir_sge(nb, src[1], src[0]);
+      return;
+
+   case GLSLstd450Fma:         op = nir_op_ffma;       break;
+   case GLSLstd450Ldexp:       op = nir_op_ldexp;      break;
+
+   /* Packing/Unpacking functions */
+   case GLSLstd450PackSnorm4x8:      op = nir_op_pack_snorm_4x8;      break;
+   case GLSLstd450PackUnorm4x8:      op = nir_op_pack_unorm_4x8;      break;
+   case GLSLstd450PackSnorm2x16:     op = nir_op_pack_snorm_2x16;     break;
+   case GLSLstd450PackUnorm2x16:     op = nir_op_pack_unorm_2x16;     break;
+   case GLSLstd450PackHalf2x16:      op = nir_op_pack_half_2x16;      break;
+   case GLSLstd450UnpackSnorm4x8:    op = nir_op_unpack_snorm_4x8;    break;
+   case GLSLstd450UnpackUnorm4x8:    op = nir_op_unpack_unorm_4x8;    break;
+   case GLSLstd450UnpackSnorm2x16:   op = nir_op_unpack_snorm_2x16;   break;
+   case GLSLstd450UnpackUnorm2x16:   op = nir_op_unpack_unorm_2x16;   break;
+   case GLSLstd450UnpackHalf2x16:    op = nir_op_unpack_half_2x16;    break;
+
+   case GLSLstd450Length:
+      val->ssa->def = build_length(nb, src[0]);
+      return;
+   case GLSLstd450Distance:
+      val->ssa->def = build_length(nb, nir_fsub(nb, src[0], src[1]));
+      return;
+   case GLSLstd450Normalize:
+      val->ssa->def = nir_fdiv(nb, src[0], build_length(nb, src[0]));
+      return;
+
+   case GLSLstd450Exp:
+      val->ssa->def = build_exp(nb, src[0]);
+      return;
+
+   case GLSLstd450Log:
+      val->ssa->def = build_log(nb, src[0]);
+      return;
+
+   case GLSLstd450FClamp:
+      val->ssa->def = build_fclamp(nb, src[0], src[1], src[2]);
+      return;
+   case GLSLstd450UClamp:
+      val->ssa->def = nir_umin(nb, nir_umax(nb, src[0], src[1]), src[2]);
+      return;
+   case GLSLstd450SClamp:
+      val->ssa->def = nir_imin(nb, nir_imax(nb, src[0], src[1]), src[2]);
+      return;
+
+   case GLSLstd450Cross: {
+      unsigned yzx[4] = { 1, 2, 0, 0 };
+      unsigned zxy[4] = { 2, 0, 1, 0 };
+      val->ssa->def =
+         nir_fsub(nb, nir_fmul(nb, nir_swizzle(nb, src[0], yzx, 3, true),
+                                   nir_swizzle(nb, src[1], zxy, 3, true)),
+                      nir_fmul(nb, nir_swizzle(nb, src[0], zxy, 3, true),
+                                   nir_swizzle(nb, src[1], yzx, 3, true)));
+      return;
+   }
+
+   case GLSLstd450SmoothStep: {
+      /* t = clamp((x - edge0) / (edge1 - edge0), 0, 1) */
+      nir_ssa_def *t =
+         build_fclamp(nb, nir_fdiv(nb, nir_fsub(nb, src[2], src[0]),
+                                       nir_fsub(nb, src[1], src[0])),
+                          nir_imm_float(nb, 0.0), nir_imm_float(nb, 1.0));
+      /* result = t * t * (3 - 2 * t) */
+      val->ssa->def =
+         nir_fmul(nb, t, nir_fmul(nb, t,
+            nir_fsub(nb, nir_imm_float(nb, 3.0),
+                         nir_fmul(nb, nir_imm_float(nb, 2.0), t))));
+      return;
+   }
+
+   case GLSLstd450FaceForward:
+      val->ssa->def =
+         nir_bcsel(nb, nir_flt(nb, nir_fdot(nb, src[2], src[1]),
+                                   nir_imm_float(nb, 0.0)),
+                       src[0], nir_fneg(nb, src[0]));
+      return;
+
+   case GLSLstd450Reflect:
+      /* I - 2 * dot(N, I) * N */
+      val->ssa->def =
+         nir_fsub(nb, src[0], nir_fmul(nb, nir_imm_float(nb, 2.0),
+                              nir_fmul(nb, nir_fdot(nb, src[0], src[1]),
+                                           src[1])));
+      return;
+
+   case GLSLstd450Refract: {
+      nir_ssa_def *I = src[0];
+      nir_ssa_def *N = src[1];
+      nir_ssa_def *eta = src[2];
+      nir_ssa_def *n_dot_i = nir_fdot(nb, N, I);
+      nir_ssa_def *one = nir_imm_float(nb, 1.0);
+      nir_ssa_def *zero = nir_imm_float(nb, 0.0);
+      /* k = 1.0 - eta * eta * (1.0 - dot(N, I) * dot(N, I)) */
+      nir_ssa_def *k =
+         nir_fsub(nb, one, nir_fmul(nb, eta, nir_fmul(nb, eta,
+                      nir_fsub(nb, one, nir_fmul(nb, n_dot_i, n_dot_i)))));
+      nir_ssa_def *result =
+         nir_fsub(nb, nir_fmul(nb, eta, I),
+                      nir_fmul(nb, nir_fadd(nb, nir_fmul(nb, eta, n_dot_i),
+                                                nir_fsqrt(nb, k)), N));
+      /* XXX: bcsel, or if statement? */
+      val->ssa->def = nir_bcsel(nb, nir_flt(nb, k, zero), zero, result);
+      return;
+   }
+
+   case GLSLstd450Sinh:
+      /* 0.5 * (e^x - e^(-x)) */
+      val->ssa->def =
+         nir_fmul(nb, nir_imm_float(nb, 0.5f),
+                      nir_fsub(nb, build_exp(nb, src[0]),
+                                   build_exp(nb, nir_fneg(nb, src[0]))));
+      return;
+
+   case GLSLstd450Cosh:
+      /* 0.5 * (e^x + e^(-x)) */
+      val->ssa->def =
+         nir_fmul(nb, nir_imm_float(nb, 0.5f),
+                      nir_fadd(nb, build_exp(nb, src[0]),
+                                   build_exp(nb, nir_fneg(nb, src[0]))));
+      return;
+
+   case GLSLstd450Tanh:
+      /* (0.5 * (e^x - e^(-x))) / (0.5 * (e^x + e^(-x))) */
+      val->ssa->def =
+         nir_fdiv(nb, nir_fmul(nb, nir_imm_float(nb, 0.5f),
+                                   nir_fsub(nb, build_exp(nb, src[0]),
+                                                build_exp(nb, nir_fneg(nb, src[0])))),
+                      nir_fmul(nb, nir_imm_float(nb, 0.5f),
+                                   nir_fadd(nb, build_exp(nb, src[0]),
+                                                build_exp(nb, nir_fneg(nb, src[0])))));
+      return;
+
+   case GLSLstd450Asinh:
+      val->ssa->def = nir_fmul(nb, nir_fsign(nb, src[0]),
+         build_log(nb, nir_fadd(nb, nir_fabs(nb, src[0]),
+                       nir_fsqrt(nb, nir_fadd(nb, nir_fmul(nb, src[0], src[0]),
+                                                  nir_imm_float(nb, 1.0f))))));
+      return;
+   case GLSLstd450Acosh:
+      val->ssa->def = build_log(nb, nir_fadd(nb, src[0],
+         nir_fsqrt(nb, nir_fsub(nb, nir_fmul(nb, src[0], src[0]),
+                                    nir_imm_float(nb, 1.0f)))));
+      return;
+   case GLSLstd450Atanh: {
+      nir_ssa_def *one = nir_imm_float(nb, 1.0);
+      val->ssa->def = nir_fmul(nb, nir_imm_float(nb, 0.5f),
+         build_log(nb, nir_fdiv(nb, nir_fadd(nb, one, src[0]),
+                                    nir_fsub(nb, one, src[0]))));
+      return;
+   }
+
+   case GLSLstd450FindILsb:   op = nir_op_find_lsb;   break;
+   case GLSLstd450FindSMsb:   op = nir_op_ifind_msb;  break;
+   case GLSLstd450FindUMsb:   op = nir_op_ufind_msb;  break;
+
+   case GLSLstd450Asin:
+      val->ssa->def = build_asin(nb, src[0]);
+      return;
+
+   case GLSLstd450Acos:
+      val->ssa->def = build_acos(nb, src[0]);
+      return;
+
+   case GLSLstd450Atan:
+      val->ssa->def = build_atan(nb, src[0]);
+      return;
+
+   case GLSLstd450Atan2:
+      val->ssa->def = build_atan2(nb, src[0], src[1]);
+      return;
+
+   case GLSLstd450Frexp: {
+      nir_ssa_def *exponent;
+      val->ssa->def = build_frexp(nb, src[0], &exponent);
+      nir_store_deref_var(nb, vtn_nir_deref(b, w[6]), exponent, 0xf);
+      return;
+   }
+
+   case GLSLstd450FrexpStruct: {
+      assert(glsl_type_is_struct(val->ssa->type));
+      val->ssa->elems[0]->def = build_frexp(nb, src[0],
+                                            &val->ssa->elems[1]->def);
+      return;
+   }
+
+   case GLSLstd450PackDouble2x32:
+   case GLSLstd450UnpackDouble2x32:
+   default:
+      unreachable("Unhandled opcode");
+   }
+
+   nir_alu_instr *instr = nir_alu_instr_create(b->shader, op);
+   nir_ssa_dest_init(&instr->instr, &instr->dest.dest,
+                     glsl_get_vector_elements(val->ssa->type), val->name);
+   instr->dest.write_mask = (1 << instr->dest.dest.ssa.num_components) - 1;
+   val->ssa->def = &instr->dest.dest.ssa;
+
+   for (unsigned i = 0; i < nir_op_infos[op].num_inputs; i++)
+      instr->src[i].src = nir_src_for_ssa(src[i]);
+
+   nir_builder_instr_insert(nb, &instr->instr);
+}
+
+bool
+vtn_handle_glsl450_instruction(struct vtn_builder *b, uint32_t ext_opcode,
+                               const uint32_t *w, unsigned count)
+{
+   switch ((enum GLSLstd450)ext_opcode) {
+   case GLSLstd450Determinant: {
+      struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_ssa);
+      val->ssa = rzalloc(b, struct vtn_ssa_value);
+      val->ssa->type = vtn_value(b, w[1], vtn_value_type_type)->type->type;
+      val->ssa->def = build_mat_det(b, vtn_ssa_value(b, w[5]));
+      break;
+   }
+
+   case GLSLstd450MatrixInverse: {
+      struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_ssa);
+      val->ssa = matrix_inverse(b, vtn_ssa_value(b, w[5]));
+      break;
+   }
+
+   case GLSLstd450InterpolateAtCentroid:
+   case GLSLstd450InterpolateAtSample:
+   case GLSLstd450InterpolateAtOffset:
+      unreachable("Unhandled opcode");
+
+   default:
+      handle_glsl450_alu(b, (enum GLSLstd450)ext_opcode, w, count);
+   }
+
+   return true;
+}
diff --git a/src/compiler/nir/spirv/vtn_private.h b/src/compiler/nir/spirv/vtn_private.h
new file mode 100644
index 00000000000..3840d8c4b65
--- /dev/null
+++ b/src/compiler/nir/spirv/vtn_private.h
@@ -0,0 +1,484 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "nir/nir.h"
+#include "nir/nir_builder.h"
+#include "nir/nir_array.h"
+#include "nir_spirv.h"
+#include "spirv.h"
+
+struct vtn_builder;
+struct vtn_decoration;
+
+enum vtn_value_type {
+   vtn_value_type_invalid = 0,
+   vtn_value_type_undef,
+   vtn_value_type_string,
+   vtn_value_type_decoration_group,
+   vtn_value_type_type,
+   vtn_value_type_constant,
+   vtn_value_type_access_chain,
+   vtn_value_type_function,
+   vtn_value_type_block,
+   vtn_value_type_ssa,
+   vtn_value_type_extension,
+   vtn_value_type_image_pointer,
+   vtn_value_type_sampled_image,
+};
+
+enum vtn_branch_type {
+   vtn_branch_type_none,
+   vtn_branch_type_switch_break,
+   vtn_branch_type_switch_fallthrough,
+   vtn_branch_type_loop_break,
+   vtn_branch_type_loop_continue,
+   vtn_branch_type_discard,
+   vtn_branch_type_return,
+};
+
+enum vtn_cf_node_type {
+   vtn_cf_node_type_block,
+   vtn_cf_node_type_if,
+   vtn_cf_node_type_loop,
+   vtn_cf_node_type_switch,
+};
+
+struct vtn_cf_node {
+   struct list_head link;
+   enum vtn_cf_node_type type;
+};
+
+struct vtn_loop {
+   struct vtn_cf_node node;
+
+   /* The main body of the loop */
+   struct list_head body;
+
+   /* The "continue" part of the loop.  This gets executed after the body
+    * and is where you go when you hit a continue.
+    */
+   struct list_head cont_body;
+
+   SpvLoopControlMask control;
+};
+
+struct vtn_if {
+   struct vtn_cf_node node;
+
+   uint32_t condition;
+
+   enum vtn_branch_type then_type;
+   struct list_head then_body;
+
+   enum vtn_branch_type else_type;
+   struct list_head else_body;
+
+   SpvSelectionControlMask control;
+};
+
+struct vtn_case {
+   struct list_head link;
+
+   struct list_head body;
+
+   /* The block that starts this case */
+   struct vtn_block *start_block;
+
+   /* The fallthrough case, if any */
+   struct vtn_case *fallthrough;
+
+   /* The uint32_t values that map to this case */
+   nir_array values;
+
+   /* True if this is the default case */
+   bool is_default;
+
+   /* Initialized to false; used when sorting the list of cases */
+   bool visited;
+};
+
+struct vtn_switch {
+   struct vtn_cf_node node;
+
+   uint32_t selector;
+
+   struct list_head cases;
+};
+
+struct vtn_block {
+   struct vtn_cf_node node;
+
+   /** A pointer to the label instruction */
+   const uint32_t *label;
+
+   /** A pointer to the merge instruction (or NULL if non exists) */
+   const uint32_t *merge;
+
+   /** A pointer to the branch instruction that ends this block */
+   const uint32_t *branch;
+
+   enum vtn_branch_type branch_type;
+
+   /** Points to the loop that this block starts (if it starts a loop) */
+   struct vtn_loop *loop;
+
+   /** Points to the switch case started by this block (if any) */
+   struct vtn_case *switch_case;
+
+   /** The last block in this SPIR-V block. */
+   nir_block *end_block;
+};
+
+struct vtn_function {
+   struct exec_node node;
+
+   nir_function_impl *impl;
+   struct vtn_block *start_block;
+
+   struct list_head body;
+
+   const uint32_t *end;
+
+   SpvFunctionControlMask control;
+};
+
+typedef bool (*vtn_instruction_handler)(struct vtn_builder *, uint32_t,
+                                        const uint32_t *, unsigned);
+
+void vtn_build_cfg(struct vtn_builder *b, const uint32_t *words,
+                   const uint32_t *end);
+void vtn_function_emit(struct vtn_builder *b, struct vtn_function *func,
+                       vtn_instruction_handler instruction_handler);
+
+const uint32_t *
+vtn_foreach_instruction(struct vtn_builder *b, const uint32_t *start,
+                        const uint32_t *end, vtn_instruction_handler handler);
+
+struct vtn_ssa_value {
+   union {
+      nir_ssa_def *def;
+      struct vtn_ssa_value **elems;
+   };
+
+   /* For matrices, if this is non-NULL, then this value is actually the
+    * transpose of some other value.  The value that `transposed` points to
+    * always dominates this value.
+    */
+   struct vtn_ssa_value *transposed;
+
+   const struct glsl_type *type;
+};
+
+struct vtn_type {
+   const struct glsl_type *type;
+
+   /* The value that declares this type.  Used for finding decorations */
+   struct vtn_value *val;
+
+   /* for matrices, whether the matrix is stored row-major */
+   bool row_major;
+
+   /* for structs, the offset of each member */
+   unsigned *offsets;
+
+   /* for structs, whether it was decorated as a "non-SSBO-like" block */
+   bool block;
+
+   /* for structs, whether it was decorated as an "SSBO-like" block */
+   bool buffer_block;
+
+   /* for structs with block == true, whether this is a builtin block (i.e. a
+    * block that contains only builtins).
+    */
+   bool builtin_block;
+
+   /* Image format for image_load_store type images */
+   unsigned image_format;
+
+   /* Access qualifier for storage images */
+   SpvAccessQualifier access_qualifier;
+
+   /* for arrays and matrices, the array stride */
+   unsigned stride;
+
+   /* for arrays, the vtn_type for the elements of the array */
+   struct vtn_type *array_element;
+
+   /* for structures, the vtn_type for each member */
+   struct vtn_type **members;
+
+   /* Whether this type, or a parent type, has been decorated as a builtin */
+   bool is_builtin;
+
+   SpvBuiltIn builtin;
+};
+
+struct vtn_variable;
+
+enum vtn_access_mode {
+   vtn_access_mode_id,
+   vtn_access_mode_literal,
+};
+
+struct vtn_access_link {
+   enum vtn_access_mode mode;
+   uint32_t id;
+};
+
+struct vtn_access_chain {
+   struct vtn_variable *var;
+
+   uint32_t length;
+
+   /* Struct elements and array offsets */
+   struct vtn_access_link link[0];
+};
+
+enum vtn_variable_mode {
+   vtn_variable_mode_local,
+   vtn_variable_mode_global,
+   vtn_variable_mode_param,
+   vtn_variable_mode_ubo,
+   vtn_variable_mode_ssbo,
+   vtn_variable_mode_push_constant,
+   vtn_variable_mode_image,
+   vtn_variable_mode_sampler,
+   vtn_variable_mode_workgroup,
+   vtn_variable_mode_input,
+   vtn_variable_mode_output,
+};
+
+struct vtn_variable {
+   enum vtn_variable_mode mode;
+
+   struct vtn_type *type;
+
+   unsigned descriptor_set;
+   unsigned binding;
+
+   nir_variable *var;
+   nir_variable **members;
+
+   struct vtn_access_chain chain;
+};
+
+struct vtn_image_pointer {
+   struct vtn_access_chain *image;
+   nir_ssa_def *coord;
+   nir_ssa_def *sample;
+};
+
+struct vtn_sampled_image {
+   struct vtn_access_chain *image; /* Image or array of images */
+   struct vtn_access_chain *sampler; /* Sampler */
+};
+
+struct vtn_value {
+   enum vtn_value_type value_type;
+   const char *name;
+   struct vtn_decoration *decoration;
+   union {
+      void *ptr;
+      char *str;
+      struct vtn_type *type;
+      struct {
+         nir_constant *constant;
+         const struct glsl_type *const_type;
+      };
+      struct vtn_access_chain *access_chain;
+      struct vtn_image_pointer *image;
+      struct vtn_sampled_image *sampled_image;
+      struct vtn_function *func;
+      struct vtn_block *block;
+      struct vtn_ssa_value *ssa;
+      vtn_instruction_handler ext_handler;
+   };
+};
+
+#define VTN_DEC_DECORATION -1
+#define VTN_DEC_EXECUTION_MODE -2
+#define VTN_DEC_STRUCT_MEMBER0 0
+
+struct vtn_decoration {
+   struct vtn_decoration *next;
+
+   /* Specifies how to apply this decoration.  Negative values represent a
+    * decoration or execution mode. (See the VTN_DEC_ #defines above.)
+    * Non-negative values specify that it applies to a structure member.
+    */
+   int scope;
+
+   const uint32_t *literals;
+   struct vtn_value *group;
+
+   union {
+      SpvDecoration decoration;
+      SpvExecutionMode exec_mode;
+   };
+};
+
+struct vtn_builder {
+   nir_builder nb;
+
+   nir_shader *shader;
+   nir_function_impl *impl;
+   struct vtn_block *block;
+
+   /* Current file, line, and column.  Useful for debugging.  Set
+    * automatically by vtn_foreach_instruction.
+    */
+   char *file;
+   int line, col;
+
+   /*
+    * In SPIR-V, constants are global, whereas in NIR, the load_const
+    * instruction we use is per-function. So while we parse each function, we
+    * keep a hash table of constants we've resolved to nir_ssa_value's so
+    * far, and we lazily resolve them when we see them used in a function.
+    */
+   struct hash_table *const_table;
+
+   /*
+    * Map from phi instructions (pointer to the start of the instruction)
+    * to the variable corresponding to it.
+    */
+   struct hash_table *phi_table;
+
+   unsigned num_specializations;
+   struct nir_spirv_specialization *specializations;
+
+   unsigned value_id_bound;
+   struct vtn_value *values;
+
+   gl_shader_stage entry_point_stage;
+   const char *entry_point_name;
+   struct vtn_value *entry_point;
+   bool origin_upper_left;
+
+   struct vtn_function *func;
+   struct exec_list functions;
+
+   /* Current function parameter index */
+   unsigned func_param_idx;
+
+   bool has_loop_continue;
+};
+
+static inline struct vtn_value *
+vtn_push_value(struct vtn_builder *b, uint32_t value_id,
+               enum vtn_value_type value_type)
+{
+   assert(value_id < b->value_id_bound);
+   assert(b->values[value_id].value_type == vtn_value_type_invalid);
+
+   b->values[value_id].value_type = value_type;
+
+   return &b->values[value_id];
+}
+
+static inline struct vtn_value *
+vtn_untyped_value(struct vtn_builder *b, uint32_t value_id)
+{
+   assert(value_id < b->value_id_bound);
+   return &b->values[value_id];
+}
+
+static inline struct vtn_value *
+vtn_value(struct vtn_builder *b, uint32_t value_id,
+          enum vtn_value_type value_type)
+{
+   struct vtn_value *val = vtn_untyped_value(b, value_id);
+   assert(val->value_type == value_type);
+   return val;
+}
+
+struct vtn_ssa_value *vtn_ssa_value(struct vtn_builder *b, uint32_t value_id);
+
+struct vtn_ssa_value *vtn_create_ssa_value(struct vtn_builder *b,
+                                           const struct glsl_type *type);
+
+struct vtn_ssa_value *vtn_ssa_transpose(struct vtn_builder *b,
+                                        struct vtn_ssa_value *src);
+
+nir_ssa_def *vtn_vector_extract(struct vtn_builder *b, nir_ssa_def *src,
+                                unsigned index);
+nir_ssa_def *vtn_vector_extract_dynamic(struct vtn_builder *b, nir_ssa_def *src,
+                                        nir_ssa_def *index);
+nir_ssa_def *vtn_vector_insert(struct vtn_builder *b, nir_ssa_def *src,
+                               nir_ssa_def *insert, unsigned index);
+nir_ssa_def *vtn_vector_insert_dynamic(struct vtn_builder *b, nir_ssa_def *src,
+                                       nir_ssa_def *insert, nir_ssa_def *index);
+
+nir_deref_var *vtn_nir_deref(struct vtn_builder *b, uint32_t id);
+
+nir_deref_var *vtn_access_chain_to_deref(struct vtn_builder *b,
+                                         struct vtn_access_chain *chain);
+nir_ssa_def *
+vtn_access_chain_to_offset(struct vtn_builder *b,
+                           struct vtn_access_chain *chain,
+                           nir_ssa_def **index_out, struct vtn_type **type_out,
+                           unsigned *end_idx_out, bool stop_at_matrix);
+
+struct vtn_ssa_value *vtn_local_load(struct vtn_builder *b, nir_deref_var *src);
+
+void vtn_local_store(struct vtn_builder *b, struct vtn_ssa_value *src,
+                     nir_deref_var *dest);
+
+struct vtn_ssa_value *
+vtn_variable_load(struct vtn_builder *b, struct vtn_access_chain *src);
+
+void vtn_variable_store(struct vtn_builder *b, struct vtn_ssa_value *src,
+                        struct vtn_access_chain *dest);
+
+void vtn_handle_variables(struct vtn_builder *b, SpvOp opcode,
+                          const uint32_t *w, unsigned count);
+
+
+typedef void (*vtn_decoration_foreach_cb)(struct vtn_builder *,
+                                          struct vtn_value *,
+                                          int member,
+                                          const struct vtn_decoration *,
+                                          void *);
+
+void vtn_foreach_decoration(struct vtn_builder *b, struct vtn_value *value,
+                            vtn_decoration_foreach_cb cb, void *data);
+
+typedef void (*vtn_execution_mode_foreach_cb)(struct vtn_builder *,
+                                              struct vtn_value *,
+                                              const struct vtn_decoration *,
+                                              void *);
+
+void vtn_foreach_execution_mode(struct vtn_builder *b, struct vtn_value *value,
+                                vtn_execution_mode_foreach_cb cb, void *data);
+
+nir_op vtn_nir_alu_op_for_spirv_opcode(SpvOp opcode, bool *swap);
+
+void vtn_handle_alu(struct vtn_builder *b, SpvOp opcode,
+                    const uint32_t *w, unsigned count);
+
+bool vtn_handle_glsl450_instruction(struct vtn_builder *b, uint32_t ext_opcode,
+                                    const uint32_t *words, unsigned count);
diff --git a/src/compiler/nir/spirv/vtn_variables.c b/src/compiler/nir/spirv/vtn_variables.c
new file mode 100644
index 00000000000..3ad98aa5310
--- /dev/null
+++ b/src/compiler/nir/spirv/vtn_variables.c
@@ -0,0 +1,1412 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#include "vtn_private.h"
+
+static struct vtn_access_chain *
+vtn_access_chain_extend(struct vtn_builder *b, struct vtn_access_chain *old,
+                        unsigned new_ids)
+{
+   struct vtn_access_chain *chain;
+
+   unsigned new_len = old->length + new_ids;
+   chain = ralloc_size(b, sizeof(*chain) + new_len * sizeof(chain->link[0]));
+
+   chain->var = old->var;
+   chain->length = new_len;
+
+   for (unsigned i = 0; i < old->length; i++)
+      chain->link[i] = old->link[i];
+
+   return chain;
+}
+
+static nir_ssa_def *
+vtn_access_link_as_ssa(struct vtn_builder *b, struct vtn_access_link link,
+                       unsigned stride)
+{
+   assert(stride > 0);
+   if (link.mode == vtn_access_mode_literal) {
+      return nir_imm_int(&b->nb, link.id * stride);
+   } else if (stride == 1) {
+      return vtn_ssa_value(b, link.id)->def;
+   } else {
+      return nir_imul(&b->nb, vtn_ssa_value(b, link.id)->def,
+                              nir_imm_int(&b->nb, stride));
+   }
+}
+
+static struct vtn_type *
+vtn_access_chain_tail_type(struct vtn_builder *b,
+                           struct vtn_access_chain *chain)
+{
+   struct vtn_type *type = chain->var->type;
+   for (unsigned i = 0; i < chain->length; i++) {
+      if (glsl_type_is_struct(type->type)) {
+         assert(chain->link[i].mode == vtn_access_mode_literal);
+         type = type->members[chain->link[i].id];
+      } else {
+         type = type->array_element;
+      }
+   }
+   return type;
+}
+
+/* Crawls a chain of array derefs and rewrites the types so that the
+ * lengths stay the same but the terminal type is the one given by
+ * tail_type.  This is useful for split structures.
+ */
+static void
+rewrite_deref_types(nir_deref *deref, const struct glsl_type *type)
+{
+   deref->type = type;
+   if (deref->child) {
+      assert(deref->child->deref_type == nir_deref_type_array);
+      assert(glsl_type_is_array(deref->type));
+      rewrite_deref_types(deref->child, glsl_get_array_element(type));
+   }
+}
+
+nir_deref_var *
+vtn_access_chain_to_deref(struct vtn_builder *b, struct vtn_access_chain *chain)
+{
+   nir_deref_var *deref_var;
+   if (chain->var->var) {
+      deref_var = nir_deref_var_create(b, chain->var->var);
+   } else {
+      assert(chain->var->members);
+      /* Create the deref_var manually.  It will get filled out later. */
+      deref_var = rzalloc(b, nir_deref_var);
+      deref_var->deref.deref_type = nir_deref_type_var;
+   }
+
+   struct vtn_type *deref_type = chain->var->type;
+   nir_deref *tail = &deref_var->deref;
+   nir_variable **members = chain->var->members;
+
+   for (unsigned i = 0; i < chain->length; i++) {
+      enum glsl_base_type base_type = glsl_get_base_type(deref_type->type);
+      switch (base_type) {
+      case GLSL_TYPE_UINT:
+      case GLSL_TYPE_INT:
+      case GLSL_TYPE_FLOAT:
+      case GLSL_TYPE_DOUBLE:
+      case GLSL_TYPE_BOOL:
+      case GLSL_TYPE_ARRAY: {
+         deref_type = deref_type->array_element;
+
+         nir_deref_array *deref_arr = nir_deref_array_create(b);
+         deref_arr->deref.type = deref_type->type;
+
+         if (chain->link[i].mode == vtn_access_mode_literal) {
+            deref_arr->deref_array_type = nir_deref_array_type_direct;
+            deref_arr->base_offset = chain->link[i].id;
+         } else {
+            assert(chain->link[i].mode == vtn_access_mode_id);
+            deref_arr->deref_array_type = nir_deref_array_type_indirect;
+            deref_arr->base_offset = 0;
+            deref_arr->indirect =
+               nir_src_for_ssa(vtn_ssa_value(b, chain->link[i].id)->def);
+         }
+         tail->child = &deref_arr->deref;
+         tail = tail->child;
+         break;
+      }
+
+      case GLSL_TYPE_STRUCT: {
+         assert(chain->link[i].mode == vtn_access_mode_literal);
+         unsigned idx = chain->link[i].id;
+         deref_type = deref_type->members[idx];
+         if (members) {
+            /* This is a pre-split structure. */
+            deref_var->var = members[idx];
+            rewrite_deref_types(&deref_var->deref, members[idx]->type);
+            assert(tail->type == deref_type->type);
+            members = NULL;
+         } else {
+            nir_deref_struct *deref_struct = nir_deref_struct_create(b, idx);
+            deref_struct->deref.type = deref_type->type;
+            tail->child = &deref_struct->deref;
+            tail = tail->child;
+         }
+         break;
+      }
+      default:
+         unreachable("Invalid type for deref");
+      }
+   }
+
+   assert(members == NULL);
+   return deref_var;
+}
+
+static void
+_vtn_local_load_store(struct vtn_builder *b, bool load, nir_deref_var *deref,
+                      nir_deref *tail, struct vtn_ssa_value *inout)
+{
+   /* The deref tail may contain a deref to select a component of a vector (in
+    * other words, it might not be an actual tail) so we have to save it away
+    * here since we overwrite it later.
+    */
+   nir_deref *old_child = tail->child;
+
+   if (glsl_type_is_vector_or_scalar(tail->type)) {
+      /* Terminate the deref chain in case there is one more link to pick
+       * off a component of the vector.
+       */
+      tail->child = NULL;
+
+      nir_intrinsic_op op = load ? nir_intrinsic_load_var :
+                                   nir_intrinsic_store_var;
+
+      nir_intrinsic_instr *intrin = nir_intrinsic_instr_create(b->shader, op);
+      intrin->variables[0] =
+         nir_deref_as_var(nir_copy_deref(intrin, &deref->deref));
+      intrin->num_components = glsl_get_vector_elements(tail->type);
+
+      if (load) {
+         nir_ssa_dest_init(&intrin->instr, &intrin->dest,
+                           intrin->num_components, NULL);
+         inout->def = &intrin->dest.ssa;
+      } else {
+         intrin->const_index[0] = (1 << intrin->num_components) - 1;
+         intrin->src[0] = nir_src_for_ssa(inout->def);
+      }
+
+      nir_builder_instr_insert(&b->nb, &intrin->instr);
+   } else if (glsl_get_base_type(tail->type) == GLSL_TYPE_ARRAY ||
+              glsl_type_is_matrix(tail->type)) {
+      unsigned elems = glsl_get_length(tail->type);
+      nir_deref_array *deref_arr = nir_deref_array_create(b);
+      deref_arr->deref_array_type = nir_deref_array_type_direct;
+      deref_arr->deref.type = glsl_get_array_element(tail->type);
+      tail->child = &deref_arr->deref;
+      for (unsigned i = 0; i < elems; i++) {
+         deref_arr->base_offset = i;
+         _vtn_local_load_store(b, load, deref, tail->child, inout->elems[i]);
+      }
+   } else {
+      assert(glsl_get_base_type(tail->type) == GLSL_TYPE_STRUCT);
+      unsigned elems = glsl_get_length(tail->type);
+      nir_deref_struct *deref_struct = nir_deref_struct_create(b, 0);
+      tail->child = &deref_struct->deref;
+      for (unsigned i = 0; i < elems; i++) {
+         deref_struct->index = i;
+         deref_struct->deref.type = glsl_get_struct_field(tail->type, i);
+         _vtn_local_load_store(b, load, deref, tail->child, inout->elems[i]);
+      }
+   }
+
+   tail->child = old_child;
+}
+
+nir_deref_var *
+vtn_nir_deref(struct vtn_builder *b, uint32_t id)
+{
+   struct vtn_access_chain *chain =
+      vtn_value(b, id, vtn_value_type_access_chain)->access_chain;
+
+   return vtn_access_chain_to_deref(b, chain);
+}
+
+/*
+ * Gets the NIR-level deref tail, which may have as a child an array deref
+ * selecting which component due to OpAccessChain supporting per-component
+ * indexing in SPIR-V.
+ */
+static nir_deref *
+get_deref_tail(nir_deref_var *deref)
+{
+   nir_deref *cur = &deref->deref;
+   while (!glsl_type_is_vector_or_scalar(cur->type) && cur->child)
+      cur = cur->child;
+
+   return cur;
+}
+
+struct vtn_ssa_value *
+vtn_local_load(struct vtn_builder *b, nir_deref_var *src)
+{
+   nir_deref *src_tail = get_deref_tail(src);
+   struct vtn_ssa_value *val = vtn_create_ssa_value(b, src_tail->type);
+   _vtn_local_load_store(b, true, src, src_tail, val);
+
+   if (src_tail->child) {
+      nir_deref_array *vec_deref = nir_deref_as_array(src_tail->child);
+      assert(vec_deref->deref.child == NULL);
+      val->type = vec_deref->deref.type;
+      if (vec_deref->deref_array_type == nir_deref_array_type_direct)
+         val->def = vtn_vector_extract(b, val->def, vec_deref->base_offset);
+      else
+         val->def = vtn_vector_extract_dynamic(b, val->def,
+                                               vec_deref->indirect.ssa);
+   }
+
+   return val;
+}
+
+void
+vtn_local_store(struct vtn_builder *b, struct vtn_ssa_value *src,
+                nir_deref_var *dest)
+{
+   nir_deref *dest_tail = get_deref_tail(dest);
+
+   if (dest_tail->child) {
+      struct vtn_ssa_value *val = vtn_create_ssa_value(b, dest_tail->type);
+      _vtn_local_load_store(b, true, dest, dest_tail, val);
+      nir_deref_array *deref = nir_deref_as_array(dest_tail->child);
+      assert(deref->deref.child == NULL);
+      if (deref->deref_array_type == nir_deref_array_type_direct)
+         val->def = vtn_vector_insert(b, val->def, src->def,
+                                      deref->base_offset);
+      else
+         val->def = vtn_vector_insert_dynamic(b, val->def, src->def,
+                                              deref->indirect.ssa);
+      _vtn_local_load_store(b, false, dest, dest_tail, val);
+   } else {
+      _vtn_local_load_store(b, false, dest, dest_tail, src);
+   }
+}
+
+static nir_ssa_def *
+get_vulkan_resource_index(struct vtn_builder *b, struct vtn_access_chain *chain,
+                          struct vtn_type **type, unsigned *chain_idx)
+{
+   /* Push constants have no explicit binding */
+   if (chain->var->mode == vtn_variable_mode_push_constant) {
+      *chain_idx = 0;
+      *type = chain->var->type;
+      return NULL;
+   }
+
+   nir_ssa_def *array_index;
+   if (glsl_type_is_array(chain->var->type->type)) {
+      assert(chain->length > 0);
+      array_index = vtn_access_link_as_ssa(b, chain->link[0], 1);
+      *chain_idx = 1;
+      *type = chain->var->type->array_element;
+   } else {
+      array_index = nir_imm_int(&b->nb, 0);
+      *chain_idx = 0;
+      *type = chain->var->type;
+   }
+
+   nir_intrinsic_instr *instr =
+      nir_intrinsic_instr_create(b->nb.shader,
+                                 nir_intrinsic_vulkan_resource_index);
+   instr->src[0] = nir_src_for_ssa(array_index);
+   instr->const_index[0] = chain->var->descriptor_set;
+   instr->const_index[1] = chain->var->binding;
+
+   nir_ssa_dest_init(&instr->instr, &instr->dest, 1, NULL);
+   nir_builder_instr_insert(&b->nb, &instr->instr);
+
+   return &instr->dest.ssa;
+}
+
+nir_ssa_def *
+vtn_access_chain_to_offset(struct vtn_builder *b,
+                           struct vtn_access_chain *chain,
+                           nir_ssa_def **index_out, struct vtn_type **type_out,
+                           unsigned *end_idx_out, bool stop_at_matrix)
+{
+   unsigned idx = 0;
+   struct vtn_type *type;
+   *index_out = get_vulkan_resource_index(b, chain, &type, &idx);
+
+   nir_ssa_def *offset = nir_imm_int(&b->nb, 0);
+   for (; idx < chain->length; idx++) {
+      enum glsl_base_type base_type = glsl_get_base_type(type->type);
+      switch (base_type) {
+      case GLSL_TYPE_UINT:
+      case GLSL_TYPE_INT:
+      case GLSL_TYPE_FLOAT:
+      case GLSL_TYPE_DOUBLE:
+      case GLSL_TYPE_BOOL:
+         /* Some users may not want matrix or vector derefs */
+         if (stop_at_matrix)
+            goto end;
+         /* Fall through */
+
+      case GLSL_TYPE_ARRAY:
+         offset = nir_iadd(&b->nb, offset,
+                           vtn_access_link_as_ssa(b, chain->link[idx],
+                                                  type->stride));
+
+         type = type->array_element;
+         break;
+
+      case GLSL_TYPE_STRUCT: {
+         assert(chain->link[idx].mode == vtn_access_mode_literal);
+         unsigned member = chain->link[idx].id;
+         offset = nir_iadd(&b->nb, offset,
+                           nir_imm_int(&b->nb, type->offsets[member]));
+         type = type->members[member];
+         break;
+      }
+
+      default:
+         unreachable("Invalid type for deref");
+      }
+   }
+
+end:
+   *type_out = type;
+   if (end_idx_out)
+      *end_idx_out = idx;
+
+   return offset;
+}
+
+static void
+_vtn_load_store_tail(struct vtn_builder *b, nir_intrinsic_op op, bool load,
+                     nir_ssa_def *index, nir_ssa_def *offset,
+                     struct vtn_ssa_value **inout, const struct glsl_type *type)
+{
+   nir_intrinsic_instr *instr = nir_intrinsic_instr_create(b->nb.shader, op);
+   instr->num_components = glsl_get_vector_elements(type);
+
+   int src = 0;
+   if (!load) {
+      instr->const_index[0] = (1 << instr->num_components) - 1; /* write mask */
+      instr->src[src++] = nir_src_for_ssa((*inout)->def);
+   }
+
+   /* We set the base and size for push constant load to the entire push
+    * constant block for now.
+    */
+   if (op == nir_intrinsic_load_push_constant) {
+      instr->const_index[0] = 0;
+      instr->const_index[1] = 128;
+   }
+
+   if (index)
+      instr->src[src++] = nir_src_for_ssa(index);
+
+   instr->src[src++] = nir_src_for_ssa(offset);
+
+   if (load) {
+      nir_ssa_dest_init(&instr->instr, &instr->dest,
+                        instr->num_components, NULL);
+      (*inout)->def = &instr->dest.ssa;
+   }
+
+   nir_builder_instr_insert(&b->nb, &instr->instr);
+
+   if (load && glsl_get_base_type(type) == GLSL_TYPE_BOOL)
+      (*inout)->def = nir_ine(&b->nb, (*inout)->def, nir_imm_int(&b->nb, 0));
+}
+
+static void
+_vtn_block_load_store(struct vtn_builder *b, nir_intrinsic_op op, bool load,
+                      nir_ssa_def *index, nir_ssa_def *offset,
+                      struct vtn_access_chain *chain, unsigned chain_idx,
+                      struct vtn_type *type, struct vtn_ssa_value **inout)
+{
+   if (chain && chain_idx >= chain->length)
+      chain = NULL;
+
+   if (load && chain == NULL && *inout == NULL)
+      *inout = vtn_create_ssa_value(b, type->type);
+
+   enum glsl_base_type base_type = glsl_get_base_type(type->type);
+   switch (base_type) {
+   case GLSL_TYPE_UINT:
+   case GLSL_TYPE_INT:
+   case GLSL_TYPE_FLOAT:
+   case GLSL_TYPE_BOOL:
+      /* This is where things get interesting.  At this point, we've hit
+       * a vector, a scalar, or a matrix.
+       */
+      if (glsl_type_is_matrix(type->type)) {
+         if (chain == NULL) {
+            /* Loading the whole matrix */
+            struct vtn_ssa_value *transpose;
+            unsigned num_ops, vec_width;
+            if (type->row_major) {
+               num_ops = glsl_get_vector_elements(type->type);
+               vec_width = glsl_get_matrix_columns(type->type);
+               if (load) {
+                  const struct glsl_type *transpose_type =
+                     glsl_matrix_type(base_type, vec_width, num_ops);
+                  *inout = vtn_create_ssa_value(b, transpose_type);
+               } else {
+                  transpose = vtn_ssa_transpose(b, *inout);
+                  inout = &transpose;
+               }
+            } else {
+               num_ops = glsl_get_matrix_columns(type->type);
+               vec_width = glsl_get_vector_elements(type->type);
+            }
+
+            for (unsigned i = 0; i < num_ops; i++) {
+               nir_ssa_def *elem_offset =
+                  nir_iadd(&b->nb, offset,
+                           nir_imm_int(&b->nb, i * type->stride));
+               _vtn_load_store_tail(b, op, load, index, elem_offset,
+                                    &(*inout)->elems[i],
+                                    glsl_vector_type(base_type, vec_width));
+            }
+
+            if (load && type->row_major)
+               *inout = vtn_ssa_transpose(b, *inout);
+         } else if (type->row_major) {
+            /* Row-major but with an access chiain. */
+            nir_ssa_def *col_offset =
+               vtn_access_link_as_ssa(b, chain->link[chain_idx],
+                                      type->array_element->stride);
+            offset = nir_iadd(&b->nb, offset, col_offset);
+
+            if (chain_idx + 1 < chain->length) {
+               /* Picking off a single element */
+               nir_ssa_def *row_offset =
+                  vtn_access_link_as_ssa(b, chain->link[chain_idx + 1],
+                                         type->stride);
+               offset = nir_iadd(&b->nb, offset, row_offset);
+               if (load)
+                  *inout = vtn_create_ssa_value(b, glsl_scalar_type(base_type));
+               _vtn_load_store_tail(b, op, load, index, offset, inout,
+                                    glsl_scalar_type(base_type));
+            } else {
+               /* Grabbing a column; picking one element off each row */
+               unsigned num_comps = glsl_get_vector_elements(type->type);
+               const struct glsl_type *column_type =
+                  glsl_get_column_type(type->type);
+
+               nir_ssa_def *comps[4];
+               for (unsigned i = 0; i < num_comps; i++) {
+                  nir_ssa_def *elem_offset =
+                     nir_iadd(&b->nb, offset,
+                              nir_imm_int(&b->nb, i * type->stride));
+
+                  struct vtn_ssa_value *comp, temp_val;
+                  if (!load) {
+                     temp_val.def = nir_channel(&b->nb, (*inout)->def, i);
+                     temp_val.type = glsl_scalar_type(base_type);
+                  }
+                  comp = &temp_val;
+                  _vtn_load_store_tail(b, op, load, index, elem_offset,
+                                       &comp, glsl_scalar_type(base_type));
+                  comps[i] = comp->def;
+               }
+
+               if (load) {
+                  if (*inout == NULL)
+                     *inout = vtn_create_ssa_value(b, column_type);
+
+                  (*inout)->def = nir_vec(&b->nb, comps, num_comps);
+               }
+            }
+         } else {
+            /* Column-major with a deref. Fall through to array case. */
+            nir_ssa_def *col_offset =
+               vtn_access_link_as_ssa(b, chain->link[chain_idx], type->stride);
+            offset = nir_iadd(&b->nb, offset, col_offset);
+
+            _vtn_block_load_store(b, op, load, index, offset,
+                                  chain, chain_idx + 1,
+                                  type->array_element, inout);
+         }
+      } else if (chain == NULL) {
+         /* Single whole vector */
+         assert(glsl_type_is_vector_or_scalar(type->type));
+         _vtn_load_store_tail(b, op, load, index, offset, inout, type->type);
+      } else {
+         /* Single component of a vector. Fall through to array case. */
+         nir_ssa_def *elem_offset =
+            vtn_access_link_as_ssa(b, chain->link[chain_idx], type->stride);
+         offset = nir_iadd(&b->nb, offset, elem_offset);
+
+         _vtn_block_load_store(b, op, load, index, offset, NULL, 0,
+                               type->array_element, inout);
+      }
+      return;
+
+   case GLSL_TYPE_ARRAY: {
+      unsigned elems = glsl_get_length(type->type);
+      for (unsigned i = 0; i < elems; i++) {
+         nir_ssa_def *elem_off =
+            nir_iadd(&b->nb, offset, nir_imm_int(&b->nb, i * type->stride));
+         _vtn_block_load_store(b, op, load, index, elem_off, NULL, 0,
+                               type->array_element, &(*inout)->elems[i]);
+      }
+      return;
+   }
+
+   case GLSL_TYPE_STRUCT: {
+      unsigned elems = glsl_get_length(type->type);
+      for (unsigned i = 0; i < elems; i++) {
+         nir_ssa_def *elem_off =
+            nir_iadd(&b->nb, offset, nir_imm_int(&b->nb, type->offsets[i]));
+         _vtn_block_load_store(b, op, load, index, elem_off, NULL, 0,
+                               type->members[i], &(*inout)->elems[i]);
+      }
+      return;
+   }
+
+   default:
+      unreachable("Invalid block member type");
+   }
+}
+
+static struct vtn_ssa_value *
+vtn_block_load(struct vtn_builder *b, struct vtn_access_chain *src)
+{
+   nir_intrinsic_op op;
+   switch (src->var->mode) {
+   case vtn_variable_mode_ubo:
+      op = nir_intrinsic_load_ubo;
+      break;
+   case vtn_variable_mode_ssbo:
+      op = nir_intrinsic_load_ssbo;
+      break;
+   case vtn_variable_mode_push_constant:
+      op = nir_intrinsic_load_push_constant;
+      break;
+   default:
+      assert(!"Invalid block variable mode");
+   }
+
+   nir_ssa_def *offset, *index = NULL;
+   struct vtn_type *type;
+   unsigned chain_idx;
+   offset = vtn_access_chain_to_offset(b, src, &index, &type, &chain_idx, true);
+
+   struct vtn_ssa_value *value = NULL;
+   _vtn_block_load_store(b, op, true, index, offset,
+                         src, chain_idx, type, &value);
+   return value;
+}
+
+static void
+vtn_block_store(struct vtn_builder *b, struct vtn_ssa_value *src,
+                struct vtn_access_chain *dst)
+{
+   nir_ssa_def *offset, *index = NULL;
+   struct vtn_type *type;
+   unsigned chain_idx;
+   offset = vtn_access_chain_to_offset(b, dst, &index, &type, &chain_idx, true);
+
+   _vtn_block_load_store(b, nir_intrinsic_store_ssbo, false, index, offset,
+                         dst, chain_idx, type, &src);
+}
+
+static bool
+vtn_variable_is_external_block(struct vtn_variable *var)
+{
+   return var->mode == vtn_variable_mode_ssbo ||
+          var->mode == vtn_variable_mode_ubo ||
+          var->mode == vtn_variable_mode_push_constant;
+}
+
+static void
+_vtn_variable_load_store(struct vtn_builder *b, bool load,
+                         struct vtn_access_chain *chain,
+                         struct vtn_type *tail_type,
+                         struct vtn_ssa_value **inout)
+{
+   enum glsl_base_type base_type = glsl_get_base_type(tail_type->type);
+   switch (base_type) {
+   case GLSL_TYPE_UINT:
+   case GLSL_TYPE_INT:
+   case GLSL_TYPE_FLOAT:
+   case GLSL_TYPE_BOOL:
+      /* At this point, we have a scalar, vector, or matrix so we know that
+       * there cannot be any structure splitting still in the way.  By
+       * stopping at the matrix level rather than the vector level, we
+       * ensure that matrices get loaded in the optimal way even if they
+       * are storred row-major in a UBO.
+       */
+      if (load) {
+         *inout = vtn_local_load(b, vtn_access_chain_to_deref(b, chain));
+      } else {
+         vtn_local_store(b, *inout, vtn_access_chain_to_deref(b, chain));
+      }
+      return;
+
+   case GLSL_TYPE_ARRAY:
+   case GLSL_TYPE_STRUCT: {
+      struct vtn_access_chain *new_chain =
+         vtn_access_chain_extend(b, chain, 1);
+      new_chain->link[chain->length].mode = vtn_access_mode_literal;
+      unsigned elems = glsl_get_length(tail_type->type);
+      if (load) {
+         assert(*inout == NULL);
+         *inout = rzalloc(b, struct vtn_ssa_value);
+         (*inout)->type = tail_type->type;
+         (*inout)->elems = rzalloc_array(b, struct vtn_ssa_value *, elems);
+      }
+      for (unsigned i = 0; i < elems; i++) {
+         new_chain->link[chain->length].id = i;
+         struct vtn_type *elem_type = base_type == GLSL_TYPE_ARRAY ?
+            tail_type->array_element : tail_type->members[i];
+         _vtn_variable_load_store(b, load, new_chain, elem_type,
+                                  &(*inout)->elems[i]);
+      }
+      return;
+   }
+
+   default:
+      unreachable("Invalid access chain type");
+   }
+}
+
+struct vtn_ssa_value *
+vtn_variable_load(struct vtn_builder *b, struct vtn_access_chain *src)
+{
+   if (vtn_variable_is_external_block(src->var)) {
+      return vtn_block_load(b, src);
+   } else {
+      struct vtn_type *tail_type = vtn_access_chain_tail_type(b, src);
+      struct vtn_ssa_value *val = NULL;
+      _vtn_variable_load_store(b, true, src, tail_type, &val);
+      return val;
+   }
+}
+
+void
+vtn_variable_store(struct vtn_builder *b, struct vtn_ssa_value *src,
+                   struct vtn_access_chain *dest)
+{
+   if (vtn_variable_is_external_block(dest->var)) {
+      assert(dest->var->mode == vtn_variable_mode_ssbo);
+      vtn_block_store(b, src, dest);
+   } else {
+      struct vtn_type *tail_type = vtn_access_chain_tail_type(b, dest);
+      _vtn_variable_load_store(b, false, dest, tail_type, &src);
+   }
+}
+
+static void
+_vtn_variable_copy(struct vtn_builder *b, struct vtn_access_chain *dest,
+                   struct vtn_access_chain *src, struct vtn_type *tail_type)
+{
+   enum glsl_base_type base_type = glsl_get_base_type(tail_type->type);
+   switch (base_type) {
+   case GLSL_TYPE_UINT:
+   case GLSL_TYPE_INT:
+   case GLSL_TYPE_FLOAT:
+   case GLSL_TYPE_BOOL:
+      /* At this point, we have a scalar, vector, or matrix so we know that
+       * there cannot be any structure splitting still in the way.  By
+       * stopping at the matrix level rather than the vector level, we
+       * ensure that matrices get loaded in the optimal way even if they
+       * are storred row-major in a UBO.
+       */
+      vtn_variable_store(b, vtn_variable_load(b, src), dest);
+      return;
+
+   case GLSL_TYPE_ARRAY:
+   case GLSL_TYPE_STRUCT: {
+      struct vtn_access_chain *new_src, *new_dest;
+      new_src = vtn_access_chain_extend(b, src, 1);
+      new_dest = vtn_access_chain_extend(b, dest, 1);
+      new_src->link[src->length].mode = vtn_access_mode_literal;
+      new_dest->link[dest->length].mode = vtn_access_mode_literal;
+      unsigned elems = glsl_get_length(tail_type->type);
+      for (unsigned i = 0; i < elems; i++) {
+         new_src->link[src->length].id = i;
+         new_dest->link[dest->length].id = i;
+         struct vtn_type *elem_type = base_type == GLSL_TYPE_ARRAY ?
+            tail_type->array_element : tail_type->members[i];
+         _vtn_variable_copy(b, new_dest, new_src, elem_type);
+      }
+      return;
+   }
+
+   default:
+      unreachable("Invalid access chain type");
+   }
+}
+
+static void
+vtn_variable_copy(struct vtn_builder *b, struct vtn_access_chain *dest,
+                  struct vtn_access_chain *src)
+{
+   struct vtn_type *tail_type = vtn_access_chain_tail_type(b, src);
+   assert(vtn_access_chain_tail_type(b, dest)->type == tail_type->type);
+
+   /* TODO: At some point, we should add a special-case for when we can
+    * just emit a copy_var intrinsic.
+    */
+   _vtn_variable_copy(b, dest, src, tail_type);
+}
+
+static void
+set_mode_system_value(nir_variable_mode *mode)
+{
+   assert(*mode == nir_var_system_value || *mode == nir_var_shader_in);
+   *mode = nir_var_system_value;
+}
+
+static void
+vtn_get_builtin_location(struct vtn_builder *b,
+                         SpvBuiltIn builtin, int *location,
+                         nir_variable_mode *mode)
+{
+   switch (builtin) {
+   case SpvBuiltInPosition:
+      *location = VARYING_SLOT_POS;
+      break;
+   case SpvBuiltInPointSize:
+      *location = VARYING_SLOT_PSIZ;
+      break;
+   case SpvBuiltInClipDistance:
+      *location = VARYING_SLOT_CLIP_DIST0; /* XXX CLIP_DIST1? */
+      break;
+   case SpvBuiltInCullDistance:
+      /* XXX figure this out */
+      break;
+   case SpvBuiltInVertexIndex:
+      *location = SYSTEM_VALUE_VERTEX_ID;
+      set_mode_system_value(mode);
+      break;
+   case SpvBuiltInVertexId:
+      /* Vulkan defines VertexID to be zero-based and reserves the new
+       * builtin keyword VertexIndex to indicate the non-zero-based value.
+       */
+      *location = SYSTEM_VALUE_VERTEX_ID_ZERO_BASE;
+      set_mode_system_value(mode);
+      break;
+   case SpvBuiltInInstanceIndex:
+      *location = SYSTEM_VALUE_INSTANCE_INDEX;
+      set_mode_system_value(mode);
+      break;
+   case SpvBuiltInInstanceId:
+      *location = SYSTEM_VALUE_INSTANCE_ID;
+      set_mode_system_value(mode);
+      break;
+   case SpvBuiltInPrimitiveId:
+      *location = VARYING_SLOT_PRIMITIVE_ID;
+      *mode = nir_var_shader_out;
+      break;
+   case SpvBuiltInInvocationId:
+      *location = SYSTEM_VALUE_INVOCATION_ID;
+      set_mode_system_value(mode);
+      break;
+   case SpvBuiltInLayer:
+      *location = VARYING_SLOT_LAYER;
+      *mode = nir_var_shader_out;
+      break;
+   case SpvBuiltInViewportIndex:
+      *location = VARYING_SLOT_VIEWPORT;
+      if (b->shader->stage == MESA_SHADER_GEOMETRY)
+         *mode = nir_var_shader_out;
+      else if (b->shader->stage == MESA_SHADER_FRAGMENT)
+         *mode = nir_var_shader_in;
+      else
+         unreachable("invalid stage for SpvBuiltInViewportIndex");
+      break;
+   case SpvBuiltInTessLevelOuter:
+   case SpvBuiltInTessLevelInner:
+   case SpvBuiltInTessCoord:
+   case SpvBuiltInPatchVertices:
+      unreachable("no tessellation support");
+   case SpvBuiltInFragCoord:
+      *location = VARYING_SLOT_POS;
+      assert(*mode == nir_var_shader_in);
+      break;
+   case SpvBuiltInPointCoord:
+      *location = VARYING_SLOT_PNTC;
+      assert(*mode == nir_var_shader_in);
+      break;
+   case SpvBuiltInFrontFacing:
+      *location = VARYING_SLOT_FACE;
+      assert(*mode == nir_var_shader_in);
+      break;
+   case SpvBuiltInSampleId:
+      *location = SYSTEM_VALUE_SAMPLE_ID;
+      set_mode_system_value(mode);
+      break;
+   case SpvBuiltInSamplePosition:
+      *location = SYSTEM_VALUE_SAMPLE_POS;
+      set_mode_system_value(mode);
+      break;
+   case SpvBuiltInSampleMask:
+      *location = SYSTEM_VALUE_SAMPLE_MASK_IN; /* XXX out? */
+      set_mode_system_value(mode);
+      break;
+   case SpvBuiltInFragDepth:
+      *location = FRAG_RESULT_DEPTH;
+      assert(*mode == nir_var_shader_out);
+      break;
+   case SpvBuiltInNumWorkgroups:
+      *location = SYSTEM_VALUE_NUM_WORK_GROUPS;
+      set_mode_system_value(mode);
+      break;
+   case SpvBuiltInWorkgroupSize:
+      /* This should already be handled */
+      unreachable("unsupported builtin");
+      break;
+   case SpvBuiltInWorkgroupId:
+      *location = SYSTEM_VALUE_WORK_GROUP_ID;
+      set_mode_system_value(mode);
+      break;
+   case SpvBuiltInLocalInvocationId:
+      *location = SYSTEM_VALUE_LOCAL_INVOCATION_ID;
+      set_mode_system_value(mode);
+      break;
+   case SpvBuiltInLocalInvocationIndex:
+      *location = SYSTEM_VALUE_LOCAL_INVOCATION_INDEX;
+      set_mode_system_value(mode);
+      break;
+   case SpvBuiltInGlobalInvocationId:
+      *location = SYSTEM_VALUE_GLOBAL_INVOCATION_ID;
+      set_mode_system_value(mode);
+      break;
+   case SpvBuiltInHelperInvocation:
+   default:
+      unreachable("unsupported builtin");
+   }
+}
+
+static void
+var_decoration_cb(struct vtn_builder *b, struct vtn_value *val, int member,
+                  const struct vtn_decoration *dec, void *void_var)
+{
+   struct vtn_variable *vtn_var = void_var;
+
+   /* Handle decorations that apply to a vtn_variable as a whole */
+   switch (dec->decoration) {
+   case SpvDecorationBinding:
+      vtn_var->binding = dec->literals[0];
+      return;
+   case SpvDecorationDescriptorSet:
+      vtn_var->descriptor_set = dec->literals[0];
+      return;
+
+   case SpvDecorationLocation: {
+      unsigned location = dec->literals[0];
+      bool is_vertex_input;
+      if (b->shader->stage == MESA_SHADER_FRAGMENT &&
+          vtn_var->mode == vtn_variable_mode_output) {
+         is_vertex_input = false;
+         location += FRAG_RESULT_DATA0;
+      } else if (b->shader->stage == MESA_SHADER_VERTEX &&
+                 vtn_var->mode == vtn_variable_mode_input) {
+         is_vertex_input = true;
+         location += VERT_ATTRIB_GENERIC0;
+      } else if (vtn_var->mode == vtn_variable_mode_input ||
+                 vtn_var->mode == vtn_variable_mode_output) {
+         is_vertex_input = false;
+         location += VARYING_SLOT_VAR0;
+      } else {
+         assert(!"Location must be on input or output variable");
+      }
+
+      if (vtn_var->var) {
+         vtn_var->var->data.location = location;
+         vtn_var->var->data.explicit_location = true;
+      } else {
+         assert(vtn_var->members);
+         unsigned length = glsl_get_length(vtn_var->type->type);
+         for (unsigned i = 0; i < length; i++) {
+            vtn_var->members[i]->data.location = location;
+            vtn_var->members[i]->data.explicit_location = true;
+            location +=
+               glsl_count_attribute_slots(vtn_var->members[i]->interface_type,
+                                          is_vertex_input);
+         }
+      }
+      return;
+   }
+
+   default:
+      break;
+   }
+
+   /* Now we handle decorations that apply to a particular nir_variable */
+   nir_variable *nir_var = vtn_var->var;
+   if (val->value_type == vtn_value_type_access_chain) {
+      assert(val->access_chain->length == 0);
+      assert(val->access_chain->var == void_var);
+      assert(member == -1);
+   } else {
+      assert(val->value_type == vtn_value_type_type);
+      if (member != -1)
+         nir_var = vtn_var->members[member];
+   }
+
+   if (nir_var == NULL)
+      return;
+
+   switch (dec->decoration) {
+   case SpvDecorationRelaxedPrecision:
+      break; /* FIXME: Do nothing with this for now. */
+   case SpvDecorationNoPerspective:
+      nir_var->data.interpolation = INTERP_QUALIFIER_NOPERSPECTIVE;
+      break;
+   case SpvDecorationFlat:
+      nir_var->data.interpolation = INTERP_QUALIFIER_FLAT;
+      break;
+   case SpvDecorationCentroid:
+      nir_var->data.centroid = true;
+      break;
+   case SpvDecorationSample:
+      nir_var->data.sample = true;
+      break;
+   case SpvDecorationInvariant:
+      nir_var->data.invariant = true;
+      break;
+   case SpvDecorationConstant:
+      assert(nir_var->constant_initializer != NULL);
+      nir_var->data.read_only = true;
+      break;
+   case SpvDecorationNonWritable:
+      nir_var->data.read_only = true;
+      break;
+   case SpvDecorationComponent:
+      nir_var->data.location_frac = dec->literals[0];
+      break;
+   case SpvDecorationIndex:
+      nir_var->data.explicit_index = true;
+      nir_var->data.index = dec->literals[0];
+      break;
+   case SpvDecorationBuiltIn: {
+      SpvBuiltIn builtin = dec->literals[0];
+
+      if (builtin == SpvBuiltInWorkgroupSize) {
+         /* This shouldn't be a builtin.  It's actually a constant. */
+         nir_var->data.mode = nir_var_global;
+         nir_var->data.read_only = true;
+
+         nir_constant *c = rzalloc(nir_var, nir_constant);
+         c->value.u[0] = b->shader->info.cs.local_size[0];
+         c->value.u[1] = b->shader->info.cs.local_size[1];
+         c->value.u[2] = b->shader->info.cs.local_size[2];
+         nir_var->constant_initializer = c;
+         break;
+      }
+
+      nir_variable_mode mode = nir_var->data.mode;
+      vtn_get_builtin_location(b, builtin, &nir_var->data.location, &mode);
+      nir_var->data.explicit_location = true;
+      nir_var->data.mode = mode;
+
+      if (builtin == SpvBuiltInFragCoord || builtin == SpvBuiltInSamplePosition)
+         nir_var->data.origin_upper_left = b->origin_upper_left;
+      break;
+   }
+   case SpvDecorationRowMajor:
+   case SpvDecorationColMajor:
+   case SpvDecorationGLSLShared:
+   case SpvDecorationPatch:
+   case SpvDecorationRestrict:
+   case SpvDecorationAliased:
+   case SpvDecorationVolatile:
+   case SpvDecorationCoherent:
+   case SpvDecorationNonReadable:
+   case SpvDecorationUniform:
+      /* This is really nice but we have no use for it right now. */
+   case SpvDecorationCPacked:
+   case SpvDecorationSaturatedConversion:
+   case SpvDecorationStream:
+   case SpvDecorationOffset:
+   case SpvDecorationXfbBuffer:
+   case SpvDecorationFuncParamAttr:
+   case SpvDecorationFPRoundingMode:
+   case SpvDecorationFPFastMathMode:
+   case SpvDecorationLinkageAttributes:
+   case SpvDecorationSpecId:
+      break;
+   default:
+      unreachable("Unhandled variable decoration");
+   }
+}
+
+/* Tries to compute the size of an interface block based on the strides and
+ * offsets that are provided to us in the SPIR-V source.
+ */
+static unsigned
+vtn_type_block_size(struct vtn_type *type)
+{
+   enum glsl_base_type base_type = glsl_get_base_type(type->type);
+   switch (base_type) {
+   case GLSL_TYPE_UINT:
+   case GLSL_TYPE_INT:
+   case GLSL_TYPE_FLOAT:
+   case GLSL_TYPE_BOOL:
+   case GLSL_TYPE_DOUBLE: {
+      unsigned cols = type->row_major ? glsl_get_vector_elements(type->type) :
+                                        glsl_get_matrix_columns(type->type);
+      if (cols > 1) {
+         assert(type->stride > 0);
+         return type->stride * cols;
+      } else if (base_type == GLSL_TYPE_DOUBLE) {
+         return glsl_get_vector_elements(type->type) * 8;
+      } else {
+         return glsl_get_vector_elements(type->type) * 4;
+      }
+   }
+
+   case GLSL_TYPE_STRUCT:
+   case GLSL_TYPE_INTERFACE: {
+      unsigned size = 0;
+      unsigned num_fields = glsl_get_length(type->type);
+      for (unsigned f = 0; f < num_fields; f++) {
+         unsigned field_end = type->offsets[f] +
+                              vtn_type_block_size(type->members[f]);
+         size = MAX2(size, field_end);
+      }
+      return size;
+   }
+
+   case GLSL_TYPE_ARRAY:
+      assert(type->stride > 0);
+      assert(glsl_get_length(type->type) > 0);
+      return type->stride * glsl_get_length(type->type);
+
+   default:
+      assert(!"Invalid block type");
+      return 0;
+   }
+}
+
+void
+vtn_handle_variables(struct vtn_builder *b, SpvOp opcode,
+                     const uint32_t *w, unsigned count)
+{
+   switch (opcode) {
+   case SpvOpVariable: {
+      struct vtn_variable *var = rzalloc(b, struct vtn_variable);
+      var->type = vtn_value(b, w[1], vtn_value_type_type)->type;
+
+      var->chain.var = var;
+      var->chain.length = 0;
+
+      struct vtn_value *val =
+         vtn_push_value(b, w[2], vtn_value_type_access_chain);
+      val->access_chain = &var->chain;
+
+      struct vtn_type *without_array = var->type;
+      while(glsl_type_is_array(without_array->type))
+         without_array = without_array->array_element;
+
+      nir_variable_mode nir_mode;
+      switch ((SpvStorageClass)w[3]) {
+      case SpvStorageClassUniform:
+      case SpvStorageClassUniformConstant:
+         if (without_array->block) {
+            var->mode = vtn_variable_mode_ubo;
+            b->shader->info.num_ubos++;
+         } else if (without_array->buffer_block) {
+            var->mode = vtn_variable_mode_ssbo;
+            b->shader->info.num_ssbos++;
+         } else if (glsl_type_is_image(without_array->type)) {
+            var->mode = vtn_variable_mode_image;
+            nir_mode = nir_var_uniform;
+            b->shader->info.num_images++;
+         } else if (glsl_type_is_sampler(without_array->type)) {
+            var->mode = vtn_variable_mode_sampler;
+            nir_mode = nir_var_uniform;
+            b->shader->info.num_textures++;
+         } else {
+            assert(!"Invalid uniform variable type");
+         }
+         break;
+      case SpvStorageClassPushConstant:
+         var->mode = vtn_variable_mode_push_constant;
+         assert(b->shader->num_uniforms == 0);
+         b->shader->num_uniforms = vtn_type_block_size(var->type) * 4;
+         break;
+      case SpvStorageClassInput:
+         var->mode = vtn_variable_mode_input;
+         nir_mode = nir_var_shader_in;
+         break;
+      case SpvStorageClassOutput:
+         var->mode = vtn_variable_mode_output;
+         nir_mode = nir_var_shader_out;
+         break;
+      case SpvStorageClassPrivate:
+         var->mode = vtn_variable_mode_global;
+         nir_mode = nir_var_global;
+         break;
+      case SpvStorageClassFunction:
+         var->mode = vtn_variable_mode_local;
+         nir_mode = nir_var_local;
+         break;
+      case SpvStorageClassWorkgroup:
+         var->mode = vtn_variable_mode_workgroup;
+         nir_mode = nir_var_shared;
+         break;
+      case SpvStorageClassCrossWorkgroup:
+      case SpvStorageClassGeneric:
+      case SpvStorageClassAtomicCounter:
+      default:
+         unreachable("Unhandled variable storage class");
+      }
+
+      switch (var->mode) {
+      case vtn_variable_mode_local:
+      case vtn_variable_mode_global:
+      case vtn_variable_mode_image:
+      case vtn_variable_mode_sampler:
+      case vtn_variable_mode_workgroup:
+         /* For these, we create the variable normally */
+         var->var = rzalloc(b->shader, nir_variable);
+         var->var->name = ralloc_strdup(var->var, val->name);
+         var->var->type = var->type->type;
+         var->var->data.mode = nir_mode;
+
+         switch (var->mode) {
+         case vtn_variable_mode_image:
+         case vtn_variable_mode_sampler:
+            var->var->interface_type = without_array->type;
+            break;
+         default:
+            var->var->interface_type = NULL;
+            break;
+         }
+         break;
+
+      case vtn_variable_mode_input:
+      case vtn_variable_mode_output: {
+         /* For inputs and outputs, we immediately split structures.  This
+          * is for a couple of reasons.  For one, builtins may all come in
+          * a struct and we really want those split out into separate
+          * variables.  For another, interpolation qualifiers can be
+          * applied to members of the top-level struct ane we need to be
+          * able to preserve that information.
+          */
+
+         int array_length = -1;
+         struct vtn_type *interface_type = var->type;
+         if (b->shader->stage == MESA_SHADER_GEOMETRY &&
+             glsl_type_is_array(var->type->type)) {
+            /* In Geometry shaders (and some tessellation), inputs come
+             * in per-vertex arrays.  However, some builtins come in
+             * non-per-vertex, hence the need for the is_array check.  In
+             * any case, there are no non-builtin arrays allowed so this
+             * check should be sufficient.
+             */
+            interface_type = var->type->array_element;
+            array_length = glsl_get_length(var->type->type);
+         }
+
+         if (glsl_type_is_struct(interface_type->type)) {
+            /* It's a struct.  Split it. */
+            unsigned num_members = glsl_get_length(interface_type->type);
+            var->members = ralloc_array(b, nir_variable *, num_members);
+
+            for (unsigned i = 0; i < num_members; i++) {
+               const struct glsl_type *mtype = interface_type->members[i]->type;
+               if (array_length >= 0)
+                  mtype = glsl_array_type(mtype, array_length);
+
+               var->members[i] = rzalloc(b->shader, nir_variable);
+               var->members[i]->name =
+                  ralloc_asprintf(var->members[i], "%s.%d", val->name, i);
+               var->members[i]->type = mtype;
+               var->members[i]->interface_type =
+                  interface_type->members[i]->type;
+               var->members[i]->data.mode = nir_mode;
+            }
+         } else {
+            var->var = rzalloc(b->shader, nir_variable);
+            var->var->name = ralloc_strdup(var->var, val->name);
+            var->var->type = var->type->type;
+            var->var->interface_type = interface_type->type;
+            var->var->data.mode = nir_mode;
+         }
+
+         /* For inputs and outputs, we need to grab locations and builtin
+          * information from the interface type.
+          */
+         vtn_foreach_decoration(b, interface_type->val, var_decoration_cb, var);
+         break;
+
+      case vtn_variable_mode_param:
+         unreachable("Not created through OpVariable");
+      }
+
+      case vtn_variable_mode_ubo:
+      case vtn_variable_mode_ssbo:
+      case vtn_variable_mode_push_constant:
+         /* These don't need actual variables. */
+         break;
+      }
+
+      if (count > 4) {
+         assert(count == 5);
+         nir_constant *constant =
+            vtn_value(b, w[4], vtn_value_type_constant)->constant;
+         var->var->constant_initializer =
+            nir_constant_clone(constant, var->var);
+      }
+
+      vtn_foreach_decoration(b, val, var_decoration_cb, var);
+
+      if (var->mode == vtn_variable_mode_image ||
+          var->mode == vtn_variable_mode_sampler) {
+         /* XXX: We still need the binding information in the nir_variable
+          * for these. We should fix that.
+          */
+         var->var->data.binding = var->binding;
+         var->var->data.descriptor_set = var->descriptor_set;
+
+         if (var->mode == vtn_variable_mode_image)
+            var->var->data.image.format = without_array->image_format;
+      }
+
+      if (var->mode == vtn_variable_mode_local) {
+         assert(var->members == NULL && var->var != NULL);
+         nir_function_impl_add_variable(b->impl, var->var);
+      } else if (var->var) {
+         nir_shader_add_variable(b->shader, var->var);
+      } else if (var->members) {
+         unsigned count = glsl_get_length(without_array->type);
+         for (unsigned i = 0; i < count; i++) {
+            assert(var->members[i]->data.mode != nir_var_local);
+            nir_shader_add_variable(b->shader, var->members[i]);
+         }
+      } else {
+         assert(var->mode == vtn_variable_mode_ubo ||
+                var->mode == vtn_variable_mode_ssbo ||
+                var->mode == vtn_variable_mode_push_constant);
+      }
+      break;
+   }
+
+   case SpvOpAccessChain:
+   case SpvOpInBoundsAccessChain: {
+      struct vtn_access_chain *base, *chain;
+      struct vtn_value *base_val = vtn_untyped_value(b, w[3]);
+      if (base_val->value_type == vtn_value_type_sampled_image) {
+         /* This is rather insane.  SPIR-V allows you to use OpSampledImage
+          * to combine an array of images with a single sampler to get an
+          * array of sampled images that all share the same sampler.
+          * Fortunately, this means that we can more-or-less ignore the
+          * sampler when crawling the access chain, but it does leave us
+          * with this rather awkward little special-case.
+          */
+         base = base_val->sampled_image->image;
+      } else {
+         assert(base_val->value_type == vtn_value_type_access_chain);
+         base = base_val->access_chain;
+      }
+
+      chain = vtn_access_chain_extend(b, base, count - 4);
+
+      unsigned idx = base->length;
+      for (int i = 4; i < count; i++) {
+         struct vtn_value *link_val = vtn_untyped_value(b, w[i]);
+         if (link_val->value_type == vtn_value_type_constant) {
+            chain->link[idx].mode = vtn_access_mode_literal;
+            chain->link[idx].id = link_val->constant->value.u[0];
+         } else {
+            chain->link[idx].mode = vtn_access_mode_id;
+            chain->link[idx].id = w[i];
+         }
+         idx++;
+      }
+
+      if (base_val->value_type == vtn_value_type_sampled_image) {
+         struct vtn_value *val =
+            vtn_push_value(b, w[2], vtn_value_type_sampled_image);
+         val->sampled_image = ralloc(b, struct vtn_sampled_image);
+         val->sampled_image->image = chain;
+         val->sampled_image->sampler = base_val->sampled_image->sampler;
+      } else {
+         struct vtn_value *val =
+            vtn_push_value(b, w[2], vtn_value_type_access_chain);
+         val->access_chain = chain;
+      }
+      break;
+   }
+
+   case SpvOpCopyMemory: {
+      struct vtn_value *dest = vtn_value(b, w[1], vtn_value_type_access_chain);
+      struct vtn_value *src = vtn_value(b, w[2], vtn_value_type_access_chain);
+
+      vtn_variable_copy(b, dest->access_chain, src->access_chain);
+      break;
+   }
+
+   case SpvOpLoad: {
+      struct vtn_access_chain *src =
+         vtn_value(b, w[3], vtn_value_type_access_chain)->access_chain;
+
+      if (src->var->mode == vtn_variable_mode_image ||
+          src->var->mode == vtn_variable_mode_sampler) {
+         vtn_push_value(b, w[2], vtn_value_type_access_chain)->access_chain = src;
+         return;
+      }
+
+      struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_ssa);
+      val->ssa = vtn_variable_load(b, src);
+      break;
+   }
+
+   case SpvOpStore: {
+      struct vtn_access_chain *dest =
+         vtn_value(b, w[1], vtn_value_type_access_chain)->access_chain;
+      struct vtn_ssa_value *src = vtn_ssa_value(b, w[2]);
+      vtn_variable_store(b, src, dest);
+      break;
+   }
+
+   case SpvOpArrayLength: {
+      struct vtn_access_chain *chain =
+         vtn_value(b, w[3], vtn_value_type_access_chain)->access_chain;
+
+      const uint32_t offset = chain->var->type->offsets[w[4]];
+      const uint32_t stride = chain->var->type->members[w[4]]->stride;
+
+      unsigned chain_idx;
+      struct vtn_type *type;
+      nir_ssa_def *index =
+         get_vulkan_resource_index(b, chain, &type, &chain_idx);
+
+      nir_intrinsic_instr *instr =
+         nir_intrinsic_instr_create(b->nb.shader,
+                                    nir_intrinsic_get_buffer_size);
+      instr->src[0] = nir_src_for_ssa(index);
+      nir_ssa_dest_init(&instr->instr, &instr->dest, 1, NULL);
+      nir_builder_instr_insert(&b->nb, &instr->instr);
+      nir_ssa_def *buf_size = &instr->dest.ssa;
+
+      /* array_length = max(buffer_size - offset, 0) / stride */
+      nir_ssa_def *array_length =
+         nir_idiv(&b->nb,
+                  nir_imax(&b->nb,
+                           nir_isub(&b->nb,
+                                    buf_size,
+                                    nir_imm_int(&b->nb, offset)),
+                           nir_imm_int(&b->nb, 0u)),
+                  nir_imm_int(&b->nb, stride));
+
+      struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_ssa);
+      val->ssa = vtn_create_ssa_value(b, glsl_uint_type());
+      val->ssa->def = array_length;
+      break;
+   }
+
+   case SpvOpCopyMemorySized:
+   default:
+      unreachable("Unhandled opcode");
+   }
+}
diff --git a/src/compiler/nir/spirv2nir.c b/src/compiler/nir/spirv2nir.c
new file mode 100644
index 00000000000..c837186bdfc
--- /dev/null
+++ b/src/compiler/nir/spirv2nir.c
@@ -0,0 +1,55 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+/*
+ * A simple executable that opens a SPIR-V shader, converts it to NIR, and
+ * dumps out the result.  This should be useful for testing the
+ * spirv_to_nir code.
+ */
+
+#include "spirv/nir_spirv.h"
+
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+int main(int argc, char **argv)
+{
+   int fd = open(argv[1], O_RDONLY);
+   off_t len = lseek(fd, 0, SEEK_END);
+
+   assert(len % 4 == 0);
+   size_t word_count = len / 4;
+
+   const void *map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
+   assert(map != NULL);
+
+   nir_function *func = spirv_to_nir(map, word_count, NULL, 0,
+                                     MESA_SHADER_FRAGMENT, "main", NULL);
+   nir_print_shader(func->shader, stderr);
+}
diff --git a/src/compiler/nir/tests/control_flow_tests.cpp b/src/compiler/nir/tests/control_flow_tests.cpp
new file mode 100644
index 00000000000..b9379ef3b06
--- /dev/null
+++ b/src/compiler/nir/tests/control_flow_tests.cpp
@@ -0,0 +1,148 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+#include <gtest/gtest.h>
+#include "nir.h"
+#include "nir_builder.h"
+
+class nir_cf_test : public ::testing::Test {
+protected:
+   nir_cf_test();
+   ~nir_cf_test();
+
+   nir_builder b;
+};
+
+nir_cf_test::nir_cf_test()
+{
+   static const nir_shader_compiler_options options = { };
+   nir_builder_init_simple_shader(&b, NULL, MESA_SHADER_VERTEX, &options);
+}
+
+nir_cf_test::~nir_cf_test()
+{
+   ralloc_free(b.shader);
+}
+
+TEST_F(nir_cf_test, delete_break_in_loop)
+{
+   /* Create IR:
+    *
+    * while (...) { break; }
+    */
+   nir_loop *loop = nir_loop_create(b.shader);
+   nir_cf_node_insert(nir_after_cf_list(&b.impl->body), &loop->cf_node);
+
+   b.cursor = nir_after_cf_list(&loop->body);
+
+   nir_jump_instr *jump = nir_jump_instr_create(b.shader, nir_jump_break);
+   nir_builder_instr_insert(&b, &jump->instr);
+
+   /* At this point, we should have:
+    *
+    * impl main {
+    *         block block_0:
+    *         // preds:
+    *         // succs: block_1
+    *         loop {
+    *                 block block_1:
+    *                 // preds: block_0
+    *                 break
+    *                 // succs: block_2
+    *         }
+    *         block block_2:
+    *         // preds: block_1
+    *         // succs: block_3
+    *         block block_3:
+    * }
+    */
+   nir_block *block_0 = nir_start_block(b.impl);
+   nir_block *block_1 = nir_cf_node_as_block(nir_loop_first_cf_node(loop));
+   nir_block *block_2 = nir_cf_node_as_block(nir_cf_node_next(&loop->cf_node));
+   nir_block *block_3 = b.impl->end_block;
+   ASSERT_EQ(nir_cf_node_block, block_0->cf_node.type);
+   ASSERT_EQ(nir_cf_node_block, block_1->cf_node.type);
+   ASSERT_EQ(nir_cf_node_block, block_2->cf_node.type);
+   ASSERT_EQ(nir_cf_node_block, block_3->cf_node.type);
+
+   /* Verify the successors and predecessors. */
+   EXPECT_EQ(block_1, block_0->successors[0]);
+   EXPECT_EQ(NULL,    block_0->successors[1]);
+   EXPECT_EQ(block_2, block_1->successors[0]);
+   EXPECT_EQ(NULL,    block_1->successors[1]);
+   EXPECT_EQ(block_3, block_2->successors[0]);
+   EXPECT_EQ(NULL,    block_2->successors[1]);
+   EXPECT_EQ(NULL,    block_3->successors[0]);
+   EXPECT_EQ(NULL,    block_3->successors[1]);
+   EXPECT_EQ(0,       block_0->predecessors->entries);
+   EXPECT_EQ(1,       block_1->predecessors->entries);
+   EXPECT_EQ(1,       block_2->predecessors->entries);
+   EXPECT_EQ(1,       block_3->predecessors->entries);
+   EXPECT_TRUE(_mesa_set_search(block_1->predecessors, block_0));
+   EXPECT_TRUE(_mesa_set_search(block_2->predecessors, block_1));
+   EXPECT_TRUE(_mesa_set_search(block_3->predecessors, block_2));
+
+   nir_print_shader(b.shader, stderr);
+
+   /* Now remove the break. */
+   nir_instr_remove(&jump->instr);
+
+   nir_print_shader(b.shader, stderr);
+
+   /* At this point, we should have:
+    *
+    * impl main {
+    *         block block_0:
+    *         // preds:
+    *         // succs: block_1
+    *         loop {
+    *                 block block_1:
+    *                 // preds: block_0 block_1
+    *                 // succs: block_1
+    *         }
+    *         block block_2:
+    *         // preds: block_1
+    *         // succs: block_3
+    *         block block_3:
+    * }
+    *
+    * Re-verify the predecessors and successors.
+    */
+   EXPECT_EQ(block_1, block_0->successors[0]);
+   EXPECT_EQ(NULL,    block_0->successors[1]);
+   EXPECT_EQ(block_1, block_1->successors[0]); /* back to itself */
+   EXPECT_EQ(block_2, block_1->successors[1]); /* fake successor */
+   EXPECT_EQ(block_3, block_2->successors[0]);
+   EXPECT_EQ(NULL,    block_2->successors[1]);
+   EXPECT_EQ(NULL,    block_3->successors[0]);
+   EXPECT_EQ(NULL,    block_3->successors[1]);
+   EXPECT_EQ(0,       block_0->predecessors->entries);
+   EXPECT_EQ(2,       block_1->predecessors->entries);
+   EXPECT_EQ(1,       block_2->predecessors->entries);
+   EXPECT_EQ(1,       block_3->predecessors->entries);
+   EXPECT_TRUE(_mesa_set_search(block_1->predecessors, block_0));
+   EXPECT_TRUE(_mesa_set_search(block_1->predecessors, block_1));
+   EXPECT_TRUE(_mesa_set_search(block_2->predecessors, block_1));
+   EXPECT_TRUE(_mesa_set_search(block_3->predecessors, block_2));
+
+   nir_metadata_require(b.impl, nir_metadata_dominance);
+}