nir: move to compiler/

Signed-off-by: Emil Velikov <[email protected]>
Acked-by: Matt Turner <[email protected]>
Acked-by: Jose Fonseca <[email protected]>

1 files changed, 1069 insertions, 0 deletions

diff --git a/src/compiler/nir/nir_print.c b/src/compiler/nir/nir_print.c
new file mode 100644
index 00000000000..48ecb48a620
--- /dev/null
+++ b/src/compiler/nir/nir_print.c
@@ -0,0 +1,1069 @@
+/*
+ * 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 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", "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);
+
+   struct set_entry *entry = NULL;
+   if (state->syms)
+      entry = _mesa_set_search(state->syms, var->name);
+
+   char *name;
+
+   if (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 {
+      name = var->name;
+   }
+
+   fprintf(fp, " %s", name);
+
+   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");
+
+   if (state->syms) {
+      _mesa_set_add(state->syms, name);
+      _mesa_hash_table_insert(state->ht, var, name);
+   }
+}
+
+static void
+print_var(nir_variable *var, print_state *state)
+{
+   FILE *fp = state->fp;
+   const char *name;
+   if (state->ht) {
+      struct hash_entry *entry = _mesa_hash_table_search(state->ht, var);
+
+      assert(entry != NULL);
+      name = entry->data;
+   } else {
+      name = var->name;
+   }
+
+   fprintf(fp, "%s", name);
+}
+
+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_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->sampler) {
+      print_deref(instr->sampler, state);
+   } else {
+      fprintf(fp, "%u", instr->sampler_index);
+   }
+
+   fprintf(fp, " (sampler)");
+}
+
+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);
+
+   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->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);
+
+}