i965/fs: Remove the ir_visitor code

Now that everything is running through NIR, this is all dead.

Reviewed-by: Matt Turner <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>

3 files changed, 2 insertions, 2228 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index cc76e4ad94e..28a19bd14ec 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -1129,117 +1129,18 @@ fs_reg::fs_reg(enum register_file file, int reg, enum brw_reg_type type,
    this->width = width;
 }
 
-fs_reg *
-fs_visitor::variable_storage(ir_variable *var)
-{
-   return (fs_reg *)hash_table_find(this->variable_ht, var);
-}
-
-void
-import_uniforms_callback(const void *key,
-			 void *data,
-			 void *closure)
-{
-   struct hash_table *dst_ht = (struct hash_table *)closure;
-   const fs_reg *reg = (const fs_reg *)data;
-
-   if (reg->file != UNIFORM)
-      return;
-
-   hash_table_insert(dst_ht, data, key);
-}
-
 /* For SIMD16, we need to follow from the uniform setup of SIMD8 dispatch.
  * This brings in those uniform definitions
  */
 void
 fs_visitor::import_uniforms(fs_visitor *v)
 {
-   hash_table_call_foreach(v->variable_ht,
-			   import_uniforms_callback,
-			   variable_ht);
    this->push_constant_loc = v->push_constant_loc;
    this->pull_constant_loc = v->pull_constant_loc;
    this->uniforms = v->uniforms;
    this->param_size = v->param_size;
 }
 
-/* Our support for uniforms is piggy-backed on the struct
- * gl_fragment_program, because that's where the values actually
- * get stored, rather than in some global gl_shader_program uniform
- * store.
- */
-void
-fs_visitor::setup_uniform_values(ir_variable *ir)
-{
-   int namelen = strlen(ir->name);
-
-   /* The data for our (non-builtin) uniforms is stored in a series of
-    * gl_uniform_driver_storage structs for each subcomponent that
-    * glGetUniformLocation() could name.  We know it's been set up in the same
-    * order we'd walk the type, so walk the list of storage and find anything
-    * with our name, or the prefix of a component that starts with our name.
-    */
-   unsigned params_before = uniforms;
-   for (unsigned u = 0; u < shader_prog->NumUserUniformStorage; u++) {
-      struct gl_uniform_storage *storage = &shader_prog->UniformStorage[u];
-
-      if (strncmp(ir->name, storage->name, namelen) != 0 ||
-          (storage->name[namelen] != 0 &&
-           storage->name[namelen] != '.' &&
-           storage->name[namelen] != '[')) {
-         continue;
-      }
-
-      unsigned slots = storage->type->component_slots();
-      if (storage->array_elements)
-         slots *= storage->array_elements;
-
-      for (unsigned i = 0; i < slots; i++) {
-         stage_prog_data->param[uniforms++] = &storage->storage[i];
-      }
-   }
-
-   /* Make sure we actually initialized the right amount of stuff here. */
-   assert(params_before + ir->type->component_slots() == uniforms);
-   (void)params_before;
-}
-
-
-/* Our support for builtin uniforms is even scarier than non-builtin.
- * It sits on top of the PROG_STATE_VAR parameters that are
- * automatically updated from GL context state.
- */
-void
-fs_visitor::setup_builtin_uniform_values(ir_variable *ir)
-{
-   const ir_state_slot *const slots = ir->get_state_slots();
-   assert(slots != NULL);
-
-   for (unsigned int i = 0; i < ir->get_num_state_slots(); i++) {
-      /* This state reference has already been setup by ir_to_mesa, but we'll
-       * get the same index back here.
-       */
-      int index = _mesa_add_state_reference(this->prog->Parameters,
-					    (gl_state_index *)slots[i].tokens);
-
-      /* Add each of the unique swizzles of the element as a parameter.
-       * This'll end up matching the expected layout of the
-       * array/matrix/structure we're trying to fill in.
-       */
-      int last_swiz = -1;
-      for (unsigned int j = 0; j < 4; j++) {
-	 int swiz = GET_SWZ(slots[i].swizzle, j);
-	 if (swiz == last_swiz)
-	    break;
-	 last_swiz = swiz;
-
-         stage_prog_data->param[uniforms++] =
-            &prog->Parameters->ParameterValues[index][swiz];
-      }
-   }
-}
-
 fs_reg *
 fs_visitor::emit_fragcoord_interpolation(bool pixel_center_integer,
                                          bool origin_upper_left)
diff --git a/src/mesa/drivers/dri/i965/brw_fs.h b/src/mesa/drivers/dri/i965/brw_fs.h
index 63414eb2831..3bdf0a25f37 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.h
+++ b/src/mesa/drivers/dri/i965/brw_fs.h
@@ -66,7 +66,7 @@ namespace brw {
  *
  * Translates either GLSL IR or Mesa IR (for ARB_fragment_program) into FS IR.
  */
-class fs_visitor : public backend_shader, public ir_visitor
+class fs_visitor : public backend_shader
 {
 public:
    const fs_reg reg_null_f;
@@ -84,33 +84,12 @@ public:
 
    ~fs_visitor();
 
-   fs_reg *variable_storage(ir_variable *var);
    fs_reg vgrf(const glsl_type *const type);
    fs_reg vgrf(int num_components);
    void import_uniforms(fs_visitor *v);
    void setup_uniform_clipplane_values();
    void compute_clip_distance();
 
-   void visit(ir_variable *ir);
-   void visit(ir_assignment *ir);
-   void visit(ir_dereference_variable *ir);
-   void visit(ir_dereference_record *ir);
-   void visit(ir_dereference_array *ir);
-   void visit(ir_expression *ir);
-   void visit(ir_texture *ir);
-   void visit(ir_if *ir);
-   void visit(ir_constant *ir);
-   void visit(ir_swizzle *ir);
-   void visit(ir_return *ir);
-   void visit(ir_loop *ir);
-   void visit(ir_loop_jump *ir);
-   void visit(ir_discard *ir);
-   void visit(ir_call *ir);
-   void visit(ir_function *ir);
-   void visit(ir_function_signature *ir);
-   void visit(ir_emit_vertex *);
-   void visit(ir_end_primitive *);
-
    uint32_t gather_channel(int orig_chan, uint32_t sampler);
    void swizzle_result(ir_texture_opcode op, int dest_components,
                        fs_reg orig_val, uint32_t sampler);
@@ -308,25 +287,15 @@ public:
    fs_inst *emit_math(enum opcode op, fs_reg dst, fs_reg src0, fs_reg src1);
    fs_inst *emit_lrp(const fs_reg &dst, const fs_reg &x, const fs_reg &y,
                      const fs_reg &a);
-   void emit_minmax(enum brw_conditional_mod conditionalmod, const fs_reg &dst,
-                    const fs_reg &src0, const fs_reg &src1);
    void emit_discard_jump();
    /** Copy any live channel from \p src to the first channel of \p dst. */
    void emit_uniformize(const fs_reg &dst, const fs_reg &src);
-   bool try_emit_b2f_of_comparison(ir_expression *ir);
-   bool try_emit_saturate(ir_expression *ir);
-   bool try_emit_line(ir_expression *ir);
-   bool try_emit_mad(ir_expression *ir);
    bool try_replace_with_sel();
-   bool try_opt_frontfacing_ternary(ir_if *ir);
    bool opt_peephole_sel();
    bool opt_peephole_predicated_break();
    bool opt_saturate_propagation();
    bool opt_cmod_propagation();
    bool opt_zero_samples();
-   void emit_bool_to_cond_code(ir_rvalue *condition);
-   void emit_bool_to_cond_code_of_reg(ir_expression *expr, fs_reg op[3]);
-   void emit_if_gen6(ir_if *ir);
    void emit_unspill(bblock_t *block, fs_inst *inst, fs_reg reg,
                      uint32_t spill_offset, int count);
    void emit_spill(bblock_t *block, fs_inst *inst, fs_reg reg,
@@ -377,23 +346,11 @@ public:
    void emit_untyped_surface_read(unsigned surf_index, fs_reg dst,
                                   fs_reg offset);
 
-   void emit_interpolate_expression(ir_expression *ir);
-
-   bool try_rewrite_rhs_to_dst(ir_assignment *ir,
-			       fs_reg dst,
-			       fs_reg src,
-			       fs_inst *pre_rhs_inst,
-			       fs_inst *last_rhs_inst);
-   void emit_assignment_writes(fs_reg &l, fs_reg &r,
-			       const glsl_type *type, bool predicated);
    void resolve_ud_negate(fs_reg *reg);
-   void resolve_bool_comparison(ir_rvalue *rvalue, fs_reg *reg);
 
    fs_reg get_timestamp(fs_inst **out_mov);
 
    struct brw_reg interp_reg(int location, int channel);
-   void setup_uniform_values(ir_variable *ir);
-   void setup_builtin_uniform_values(ir_variable *ir);
    int implied_mrf_writes(fs_inst *inst);
 
    virtual void dump_instructions();
@@ -401,8 +358,6 @@ public:
    void dump_instruction(backend_instruction *inst);
    void dump_instruction(backend_instruction *inst, FILE *file);
 
-   void visit_atomic_counter_intrinsic(ir_call *ir);
-
    const void *const key;
    const struct brw_sampler_prog_key_data *key_tex;
 
@@ -438,7 +393,6 @@ public:
     */
    int *push_constant_loc;
 
-   struct hash_table *variable_ht;
    fs_reg frag_depth;
    fs_reg sample_mask;
    fs_reg outputs[VARYING_SLOT_MAX];
@@ -465,7 +419,7 @@ public:
    bool simd16_unsupported;
    char *no16_msg;
 
-   /* Result of last visit() method. */
+   /* Result of last visit() method. Still used by emit_texture() */
    fs_reg result;
 
    /** Register numbers for thread payload fields. */
diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
index 7553c3542fd..e336b73392c 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
@@ -76,219 +76,6 @@ fs_visitor::emit_vs_system_value(int location)
    return reg;
 }
 
-void
-fs_visitor::visit(ir_variable *ir)
-{
-   fs_reg *reg = NULL;
-
-   if (variable_storage(ir))
-      return;
-
-   if (ir->data.mode == ir_var_shader_in) {
-      assert(ir->data.location != -1);
-      if (stage == MESA_SHADER_VERTEX) {
-         reg = new(this->mem_ctx)
-            fs_reg(ATTR, ir->data.location,
-                   brw_type_for_base_type(ir->type->get_scalar_type()));
-      } else if (ir->data.location == VARYING_SLOT_POS) {
-         reg = emit_fragcoord_interpolation(ir->data.pixel_center_integer,
-                                            ir->data.origin_upper_left);
-      } else if (ir->data.location == VARYING_SLOT_FACE) {
-	 reg = emit_frontfacing_interpolation();
-      } else {
-         reg = new(this->mem_ctx) fs_reg(vgrf(ir->type));
-         emit_general_interpolation(*reg, ir->name, ir->type,
-                                    (glsl_interp_qualifier) ir->data.interpolation,
-                                    ir->data.location, ir->data.centroid,
-                                    ir->data.sample);
-      }
-      assert(reg);
-      hash_table_insert(this->variable_ht, reg, ir);
-      return;
-   } else if (ir->data.mode == ir_var_shader_out) {
-      reg = new(this->mem_ctx) fs_reg(vgrf(ir->type));
-
-      if (stage == MESA_SHADER_VERTEX) {
-	 int vector_elements =
-	    ir->type->is_array() ? ir->type->fields.array->vector_elements
-				 : ir->type->vector_elements;
-
-	 for (int i = 0; i < (type_size(ir->type) + 3) / 4; i++) {
-	    int output = ir->data.location + i;
-	    this->outputs[output] = *reg;
-	    this->outputs[output].reg_offset = i * 4;
-	    this->output_components[output] = vector_elements;
-	 }
-
-      } else if (ir->data.index > 0) {
-	 assert(ir->data.location == FRAG_RESULT_DATA0);
-	 assert(ir->data.index == 1);
-	 this->dual_src_output = *reg;
-         this->do_dual_src = true;
-      } else if (ir->data.location == FRAG_RESULT_COLOR) {
-	 /* Writing gl_FragColor outputs to all color regions. */
-         assert(stage == MESA_SHADER_FRAGMENT);
-         brw_wm_prog_key *key = (brw_wm_prog_key*) this->key;
-	 for (unsigned int i = 0; i < MAX2(key->nr_color_regions, 1); i++) {
-	    this->outputs[i] = *reg;
-	    this->output_components[i] = 4;
-	 }
-      } else if (ir->data.location == FRAG_RESULT_DEPTH) {
-	 this->frag_depth = *reg;
-      } else if (ir->data.location == FRAG_RESULT_SAMPLE_MASK) {
-         this->sample_mask = *reg;
-      } else {
-	 /* gl_FragData or a user-defined FS output */
-	 assert(ir->data.location >= FRAG_RESULT_DATA0 &&
-		ir->data.location < FRAG_RESULT_DATA0 + BRW_MAX_DRAW_BUFFERS);
-
-	 int vector_elements =
-	    ir->type->is_array() ? ir->type->fields.array->vector_elements
-				 : ir->type->vector_elements;
-
-	 /* General color output. */
-	 for (unsigned int i = 0; i < MAX2(1, ir->type->length); i++) {
-	    int output = ir->data.location - FRAG_RESULT_DATA0 + i;
-	    this->outputs[output] = offset(*reg, vector_elements * i);
-	    this->output_components[output] = vector_elements;
-	 }
-      }
-   } else if (ir->data.mode == ir_var_uniform) {
-      int param_index = uniforms;
-
-      /* Thanks to the lower_ubo_reference pass, we will see only
-       * ir_binop_ubo_load expressions and not ir_dereference_variable for UBO
-       * variables, so no need for them to be in variable_ht.
-       *
-       * Some uniforms, such as samplers and atomic counters, have no actual
-       * storage, so we should ignore them.
-       */
-      if (ir->is_in_uniform_block() || type_size(ir->type) == 0)
-         return;
-
-      if (dispatch_width == 16) {
-	 if (!variable_storage(ir)) {
-	    fail("Failed to find uniform '%s' in SIMD16\n", ir->name);
-	 }
-	 return;
-      }
-
-      param_size[param_index] = type_size(ir->type);
-      if (!strncmp(ir->name, "gl_", 3)) {
-	 setup_builtin_uniform_values(ir);
-      } else {
-	 setup_uniform_values(ir);
-      }
-
-      reg = new(this->mem_ctx) fs_reg(UNIFORM, param_index);
-      reg->type = brw_type_for_base_type(ir->type);
-
-   } else if (ir->data.mode == ir_var_system_value) {
-      switch (ir->data.location) {
-      case SYSTEM_VALUE_BASE_VERTEX:
-      case SYSTEM_VALUE_VERTEX_ID:
-      case SYSTEM_VALUE_VERTEX_ID_ZERO_BASE:
-      case SYSTEM_VALUE_INSTANCE_ID:
-         reg = emit_vs_system_value(ir->data.location);
-         break;
-      case SYSTEM_VALUE_SAMPLE_POS:
-	 reg = emit_samplepos_setup();
-         break;
-      case SYSTEM_VALUE_SAMPLE_ID:
-	 reg = emit_sampleid_setup();
-         break;
-      case SYSTEM_VALUE_SAMPLE_MASK_IN:
-         assert(devinfo->gen >= 7);
-         reg = new(mem_ctx)
-            fs_reg(retype(brw_vec8_grf(payload.sample_mask_in_reg, 0),
-                          BRW_REGISTER_TYPE_D));
-         break;
-      }
-   }
-
-   if (!reg)
-      reg = new(this->mem_ctx) fs_reg(vgrf(ir->type));
-
-   hash_table_insert(this->variable_ht, reg, ir);
-}
-
-void
-fs_visitor::visit(ir_dereference_variable *ir)
-{
-   fs_reg *reg = variable_storage(ir->var);
-
-   if (!reg) {
-      fail("Failed to find variable storage for %s\n", ir->var->name);
-      this->result = fs_reg(reg_null_d);
-      return;
-   }
-   this->result = *reg;
-}
-
-void
-fs_visitor::visit(ir_dereference_record *ir)
-{
-   const glsl_type *struct_type = ir->record->type;
-
-   ir->record->accept(this);
-
-   unsigned int off = 0;
-   for (unsigned int i = 0; i < struct_type->length; i++) {
-      if (strcmp(struct_type->fields.structure[i].name, ir->field) == 0)
-	 break;
-      off += type_size(struct_type->fields.structure[i].type);
-   }
-   this->result = offset(this->result, off);
-   this->result.type = brw_type_for_base_type(ir->type);
-}
-
-void
-fs_visitor::visit(ir_dereference_array *ir)
-{
-   ir_constant *constant_index;
-   fs_reg src;
-   int element_size = type_size(ir->type);
-
-   constant_index = ir->array_index->as_constant();
-
-   ir->array->accept(this);
-   src = this->result;
-   src.type = brw_type_for_base_type(ir->type);
-
-   if (constant_index) {
-      if (src.file == ATTR) {
-         /* Attribute arrays get loaded as one vec4 per element.  In that case
-          * offset the source register.
-          */
-         src.reg += constant_index->value.i[0];
-      } else {
-         assert(src.file == UNIFORM || src.file == GRF || src.file == HW_REG);
-         src = offset(src, constant_index->value.i[0] * element_size);
-      }
-   } else {
-      /* Variable index array dereference.  We attach the variable index
-       * component to the reg as a pointer to a register containing the
-       * offset.  Currently only uniform arrays are supported in this patch,
-       * and that reladdr pointer is resolved by
-       * move_uniform_array_access_to_pull_constants().  All other array types
-       * are lowered by lower_variable_index_to_cond_assign().
-       */
-      ir->array_index->accept(this);
-
-      fs_reg index_reg;
-      index_reg = vgrf(glsl_type::int_type);
-      emit(BRW_OPCODE_MUL, index_reg, this->result, fs_reg(element_size));
-
-      if (src.reladdr) {
-         emit(BRW_OPCODE_ADD, index_reg, *src.reladdr, index_reg);
-      }
-
-      src.reladdr = ralloc(mem_ctx, fs_reg);
-      memcpy(src.reladdr, &index_reg, sizeof(index_reg));
-   }
-   this->result = src;
-}
-
 fs_inst *
 fs_visitor::emit_lrp(const fs_reg &dst, const fs_reg &x, const fs_reg &y,
                      const fs_reg &a)
@@ -316,26 +103,6 @@ fs_visitor::emit_lrp(const fs_reg &dst, const fs_reg &x, const fs_reg &y,
 }
 
 void
-fs_visitor::emit_minmax(enum brw_conditional_mod conditionalmod, const fs_reg &dst,
-                        const fs_reg &src0, const fs_reg &src1)
-{
-   assert(conditionalmod == BRW_CONDITIONAL_GE ||
-          conditionalmod == BRW_CONDITIONAL_L);
-
-   fs_inst *inst;
-
-   if (devinfo->gen >= 6) {
-      inst = emit(BRW_OPCODE_SEL, dst, src0, src1);
-      inst->conditional_mod = conditionalmod;
-   } else {
-      emit(CMP(reg_null_d, src0, src1, conditionalmod));
-
-      inst = emit(BRW_OPCODE_SEL, dst, src0, src1);
-      inst->predicate = BRW_PREDICATE_NORMAL;
-   }
-}
-
-void
 fs_visitor::emit_uniformize(const fs_reg &dst, const fs_reg &src)
 {
    const fs_reg chan_index = vgrf(glsl_type::uint_type);
@@ -347,1064 +114,6 @@ fs_visitor::emit_uniformize(const fs_reg &dst, const fs_reg &src)
       ->force_writemask_all = true;
 }
 
-bool
-fs_visitor::try_emit_saturate(ir_expression *ir)
-{
-   if (ir->operation != ir_unop_saturate)
-      return false;
-
-   ir_rvalue *sat_val = ir->operands[0];
-
-   fs_inst *pre_inst = (fs_inst *) this->instructions.get_tail();
-
-   sat_val->accept(this);
-   fs_reg src = this->result;
-
-   fs_inst *last_inst = (fs_inst *) this->instructions.get_tail();
-
-   /* If the last instruction from our accept() generated our
-    * src, just set the saturate flag instead of emmitting a separate mov.
-    */
-   fs_inst *modify = get_instruction_generating_reg(pre_inst, last_inst, src);
-   if (modify && modify->regs_written == modify->dst.width / 8 &&
-       modify->can_do_saturate()) {
-      modify->saturate = true;
-      this->result = src;
-      return true;
-   }
-
-   return false;
-}
-
-bool
-fs_visitor::try_emit_line(ir_expression *ir)
-{
-   /* LINE's src0 must be of type float. */
-   if (ir->type != glsl_type::float_type)
-      return false;
-
-   ir_rvalue *nonmul = ir->operands[1];
-   ir_expression *mul = ir->operands[0]->as_expression();
-
-   if (!mul || mul->operation != ir_binop_mul) {
-      nonmul = ir->operands[0];
-      mul = ir->operands[1]->as_expression();
-
-      if (!mul || mul->operation != ir_binop_mul)
-         return false;
-   }
-
-   ir_constant *const_add = nonmul->as_constant();
-   if (!const_add)
-      return false;
-
-   int add_operand_vf = brw_float_to_vf(const_add->value.f[0]);
-   if (add_operand_vf == -1)
-      return false;
-
-   ir_rvalue *non_const_mul = mul->operands[1];
-   ir_constant *const_mul = mul->operands[0]->as_constant();
-   if (!const_mul) {
-      const_mul = mul->operands[1]->as_constant();
-
-      if (!const_mul)
-         return false;
-
-      non_const_mul = mul->operands[0];
-   }
-
-   int mul_operand_vf = brw_float_to_vf(const_mul->value.f[0]);
-   if (mul_operand_vf == -1)
-      return false;
-
-   non_const_mul->accept(this);
-   fs_reg src1 = this->result;
-
-   fs_reg src0 = vgrf(ir->type);
-   emit(BRW_OPCODE_MOV, src0,
-        fs_reg((uint8_t)mul_operand_vf, 0, 0, (uint8_t)add_operand_vf));
-
-   this->result = vgrf(ir->type);
-   emit(BRW_OPCODE_LINE, this->result, src0, src1);
-   return true;
-}
-
-bool
-fs_visitor::try_emit_mad(ir_expression *ir)
-{
-   /* 3-src instructions were introduced in gen6. */
-   if (devinfo->gen < 6)
-      return false;
-
-   /* MAD can only handle floating-point data. */
-   if (ir->type != glsl_type::float_type)
-      return false;
-
-   ir_rvalue *nonmul;
-   ir_expression *mul;
-   bool mul_negate, mul_abs;
-
-   for (int i = 0; i < 2; i++) {
-      mul_negate = false;
-      mul_abs = false;
-
-      mul = ir->operands[i]->as_expression();
-      nonmul = ir->operands[1 - i];
-
-      if (mul && mul->operation == ir_unop_abs) {
-         mul = mul->operands[0]->as_expression();
-         mul_abs = true;
-      } else if (mul && mul->operation == ir_unop_neg) {
-         mul = mul->operands[0]->as_expression();
-         mul_negate = true;
-      }
-
-      if (mul && mul->operation == ir_binop_mul)
-         break;
-   }
-
-   if (!mul || mul->operation != ir_binop_mul)
-      return false;
-
-   nonmul->accept(this);
-   fs_reg src0 = this->result;
-
-   mul->operands[0]->accept(this);
-   fs_reg src1 = this->result;
-   src1.negate ^= mul_negate;
-   src1.abs = mul_abs;
-   if (mul_abs)
-      src1.negate = false;
-
-   mul->operands[1]->accept(this);
-   fs_reg src2 = this->result;
-   src2.abs = mul_abs;
-   if (mul_abs)
-      src2.negate = false;
-
-   this->result = vgrf(ir->type);
-   emit(BRW_OPCODE_MAD, this->result, src0, src1, src2);
-
-   return true;
-}
-
-bool
-fs_visitor::try_emit_b2f_of_comparison(ir_expression *ir)
-{
-   /* On platforms that do not natively generate 0u and ~0u for Boolean
-    * results, b2f expressions that look like
-    *
-    *     f = b2f(expr cmp 0)
-    *
-    * will generate better code by pretending the expression is
-    *
-    *     f = ir_triop_csel(0.0, 1.0, expr cmp 0)
-    *
-    * This is because the last instruction of "expr" can generate the
-    * condition code for the "cmp 0".  This avoids having to do the "-(b & 1)"
-    * trick to generate 0u or ~0u for the Boolean result.  This means code like
-    *
-    *     mov(16)         g16<1>F         1F
-    *     mul.ge.f0(16)   null            g6<8,8,1>F      g14<8,8,1>F
-    *     (+f0) sel(16)   m6<1>F          g16<8,8,1>F     0F
-    *
-    * will be generated instead of
-    *
-    *     mul(16)         g2<1>F          g12<8,8,1>F     g4<8,8,1>F
-    *     cmp.ge.f0(16)   g2<1>D          g4<8,8,1>F      0F
-    *     and(16)         g4<1>D          g2<8,8,1>D      1D
-    *     and(16)         m6<1>D          -g4<8,8,1>D     0x3f800000UD
-    *
-    * When the comparison is != 0.0 using the knowledge that the false case
-    * already results in zero would allow better code generation by possibly
-    * avoiding a load-immediate instruction.
-    */
-   ir_expression *cmp = ir->operands[0]->as_expression();
-   if (cmp == NULL)
-      return false;
-
-   if (cmp->operation == ir_binop_nequal) {
-      for (unsigned i = 0; i < 2; i++) {
-         ir_constant *c = cmp->operands[i]->as_constant();
-         if (c == NULL || !c->is_zero())
-            continue;
-
-         ir_expression *expr = cmp->operands[i ^ 1]->as_expression();
-         if (expr != NULL) {
-            fs_reg op[2];
-
-            for (unsigned j = 0; j < 2; j++) {
-               cmp->operands[j]->accept(this);
-               op[j] = this->result;
-
-               resolve_ud_negate(&op[j]);
-            }
-
-            emit_bool_to_cond_code_of_reg(cmp, op);
-
-            /* In this case we know when the condition is true, op[i ^ 1]
-             * contains zero.  Invert the predicate, use op[i ^ 1] as src0,
-             * and immediate 1.0f as src1.
-             */
-            this->result = vgrf(ir->type);
-            op[i ^ 1].type = BRW_REGISTER_TYPE_F;
-
-            fs_inst *inst = emit(SEL(this->result, op[i ^ 1], fs_reg(1.0f)));
-            inst->predicate = BRW_PREDICATE_NORMAL;
-            inst->predicate_inverse = true;
-            return true;
-         }
-      }
-   }
-
-   emit_bool_to_cond_code(cmp);
-
-   fs_reg temp = vgrf(ir->type);
-   emit(MOV(temp, fs_reg(1.0f)));
-
-   this->result = vgrf(ir->type);
-   fs_inst *inst = emit(SEL(this->result, temp, fs_reg(0.0f)));
-   inst->predicate = BRW_PREDICATE_NORMAL;
-
-   return true;
-}
-
-static int
-pack_pixel_offset(float x)
-{
-   /* Clamp upper end of the range to +7/16. See explanation in non-constant
-    * offset case below. */
-   int n = MIN2((int)(x * 16), 7);
-   return n & 0xf;
-}
-
-void
-fs_visitor::emit_interpolate_expression(ir_expression *ir)
-{
-   /* in SIMD16 mode, the pixel interpolator returns coords interleaved
-    * 8 channels at a time, same as the barycentric coords presented in
-    * the FS payload. this requires a bit of extra work to support.
-    */
-   no16("interpolate_at_* not yet supported in SIMD16 mode.");
-
-   assert(stage == MESA_SHADER_FRAGMENT);
-   brw_wm_prog_key *key = (brw_wm_prog_key*) this->key;
-
-   ir_dereference * deref = ir->operands[0]->as_dereference();
-   ir_swizzle * swiz = NULL;
-   if (!deref) {
-      /* the api does not allow a swizzle here, but the varying packing code
-       * may have pushed one into here.
-       */
-      swiz = ir->operands[0]->as_swizzle();
-      assert(swiz);
-      deref = swiz->val->as_dereference();
-   }
-   assert(deref);
-   ir_variable * var = deref->variable_referenced();
-   assert(var);
-
-   /* 1. collect interpolation factors */
-
-   fs_reg dst_xy = vgrf(glsl_type::get_instance(ir->type->base_type, 2, 1));
-
-   /* for most messages, we need one reg of ignored data; the hardware requires mlen==1
-    * even when there is no payload. in the per-slot offset case, we'll replace this with
-    * the proper source data. */
-   fs_reg src = vgrf(glsl_type::float_type);
-   int mlen = 1;     /* one reg unless overriden */
-   int reg_width = dispatch_width / 8;
-   fs_inst *inst;
-
-   switch (ir->operation) {
-   case ir_unop_interpolate_at_centroid:
-      inst = emit(FS_OPCODE_INTERPOLATE_AT_CENTROID, dst_xy, src, fs_reg(0u));
-      break;
-
-   case ir_binop_interpolate_at_sample: {
-      ir_constant *sample_num = ir->operands[1]->as_constant();
-      assert(sample_num || !"nonconstant sample number should have been lowered.");
-
-      unsigned msg_data = sample_num->value.i[0] << 4;
-      inst = emit(FS_OPCODE_INTERPOLATE_AT_SAMPLE, dst_xy, src, fs_reg(msg_data));
-      break;
-   }
-
-   case ir_binop_interpolate_at_offset: {
-      ir_constant *const_offset = ir->operands[1]->as_constant();
-      if (const_offset) {
-         unsigned msg_data = pack_pixel_offset(const_offset->value.f[0]) |
-                            (pack_pixel_offset(const_offset->value.f[1]) << 4);
-         inst = emit(FS_OPCODE_INTERPOLATE_AT_SHARED_OFFSET, dst_xy, src,
-                     fs_reg(msg_data));
-      } else {
-         /* pack the operands: hw wants offsets as 4 bit signed ints */
-         ir->operands[1]->accept(this);
-         src = vgrf(glsl_type::ivec2_type);
-         fs_reg src2 = src;
-         for (int i = 0; i < 2; i++) {
-            fs_reg temp = vgrf(glsl_type::float_type);
-            emit(MUL(temp, this->result, fs_reg(16.0f)));
-            emit(MOV(src2, temp));  /* float to int */
-
-            /* Clamp the upper end of the range to +7/16. ARB_gpu_shader5 requires
-             * that we support a maximum offset of +0.5, which isn't representable
-             * in a S0.4 value -- if we didn't clamp it, we'd end up with -8/16,
-             * which is the opposite of what the shader author wanted.
-             *
-             * This is legal due to ARB_gpu_shader5's quantization rules:
-             *
-             * "Not all values of <offset> may be supported; x and y offsets may
-             * be rounded to fixed-point values with the number of fraction bits
-             * given by the implementation-dependent constant
-             * FRAGMENT_INTERPOLATION_OFFSET_BITS"
-             */
-
-            fs_inst *inst = emit(BRW_OPCODE_SEL, src2, src2, fs_reg(7));
-            inst->conditional_mod = BRW_CONDITIONAL_L; /* min(src2, 7) */
-
-            src2 = offset(src2, 1);
-            this->result = offset(this->result, 1);
-         }
-
-         mlen = 2 * reg_width;
-         inst = emit(FS_OPCODE_INTERPOLATE_AT_PER_SLOT_OFFSET, dst_xy, src,
-                     fs_reg(0u));
-      }
-      break;
-   }
-
-   default:
-      unreachable("not reached");
-   }
-
-   inst->mlen = mlen;
-   inst->regs_written = 2 * reg_width; /* 2 floats per slot returned */
-   inst->pi_noperspective = var->determine_interpolation_mode(key->flat_shade) ==
-         INTERP_QUALIFIER_NOPERSPECTIVE;
-
-   /* 2. emit linterp */
-
-   fs_reg res = vgrf(ir->type);
-   this->result = res;
-
-   for (int i = 0; i < ir->type->vector_elements; i++) {
-      int ch = swiz ? ((*(int *)&swiz->mask) >> 2*i) & 3 : i;
-      emit(FS_OPCODE_LINTERP, res, dst_xy,
-           fs_reg(interp_reg(var->data.location, ch)));
-      res = offset(res, 1);
-   }
-}
-
-void
-fs_visitor::visit(ir_expression *ir)
-{
-   unsigned int operand;
-   fs_reg op[3], temp;
-   fs_inst *inst;
-   struct brw_wm_prog_key *fs_key = (struct brw_wm_prog_key *) this->key;
-
-   assert(ir->get_num_operands() <= 3);
-
-   if (try_emit_saturate(ir))
-      return;
-
-   /* Deal with the real oddball stuff first */
-   switch (ir->operation) {
-   case ir_binop_add:
-      if (devinfo->gen <= 5 && try_emit_line(ir))
-         return;
-      if (try_emit_mad(ir))
-         return;
-      break;
-
-   case ir_triop_csel:
-      ir->operands[1]->accept(this);
-      op[1] = this->result;
-      ir->operands[2]->accept(this);
-      op[2] = this->result;
-
-      emit_bool_to_cond_code(ir->operands[0]);
-
-      this->result = vgrf(ir->type);
-      inst = emit(SEL(this->result, op[1], op[2]));
-      inst->predicate = BRW_PREDICATE_NORMAL;
-      return;
-
-   case ir_unop_b2f:
-      if (devinfo->gen <= 5 && try_emit_b2f_of_comparison(ir))
-         return;
-      break;
-
-   case ir_unop_interpolate_at_centroid:
-   case ir_binop_interpolate_at_offset:
-   case ir_binop_interpolate_at_sample:
-      emit_interpolate_expression(ir);
-      return;
-
-   default:
-      break;
-   }
-
-   for (operand = 0; operand < ir->get_num_operands(); operand++) {
-      ir->operands[operand]->accept(this);
-      if (this->result.file == BAD_FILE) {
-	 fail("Failed to get tree for expression operand:\n");
-	 ir->operands[operand]->fprint(stderr);
-         fprintf(stderr, "\n");
-      }
-      assert(this->result.file == GRF ||
-             this->result.file == UNIFORM || this->result.file == ATTR);
-      op[operand] = this->result;
-
-      /* Matrix expression operands should have been broken down to vector
-       * operations already.
-       */
-      assert(!ir->operands[operand]->type->is_matrix());
-      /* And then those vector operands should have been broken down to scalar.
-       */
-      assert(!ir->operands[operand]->type->is_vector());
-   }
-
-   /* Storage for our result.  If our result goes into an assignment, it will
-    * just get copy-propagated out, so no worries.
-    */
-   this->result = vgrf(ir->type);
-
-   switch (ir->operation) {
-   case ir_unop_logic_not:
-      emit(NOT(this->result, op[0]));
-      break;
-   case ir_unop_neg:
-      op[0].negate = !op[0].negate;
-      emit(MOV(this->result, op[0]));
-      break;
-   case ir_unop_abs:
-      op[0].abs = true;
-      op[0].negate = false;
-      emit(MOV(this->result, op[0]));
-      break;
-   case ir_unop_sign:
-      if (ir->type->is_float()) {
-         /* AND(val, 0x80000000) gives the sign bit.
-          *
-          * Predicated OR ORs 1.0 (0x3f800000) with the sign bit if val is not
-          * zero.
-          */
-         emit(CMP(reg_null_f, op[0], fs_reg(0.0f), BRW_CONDITIONAL_NZ));
-
-         op[0].type = BRW_REGISTER_TYPE_UD;
-         this->result.type = BRW_REGISTER_TYPE_UD;
-         emit(AND(this->result, op[0], fs_reg(0x80000000u)));
-
-         inst = emit(OR(this->result, this->result, fs_reg(0x3f800000u)));
-         inst->predicate = BRW_PREDICATE_NORMAL;
-
-         this->result.type = BRW_REGISTER_TYPE_F;
-      } else {
-         /*  ASR(val, 31) -> negative val generates 0xffffffff (signed -1).
-          *               -> non-negative val generates 0x00000000.
-          *  Predicated OR sets 1 if val is positive.
-          */
-         emit(CMP(reg_null_d, op[0], fs_reg(0), BRW_CONDITIONAL_G));
-
-         emit(ASR(this->result, op[0], fs_reg(31)));
-
-         inst = emit(OR(this->result, this->result, fs_reg(1)));
-         inst->predicate = BRW_PREDICATE_NORMAL;
-      }
-      break;
-   case ir_unop_rcp:
-      emit_math(SHADER_OPCODE_RCP, this->result, op[0]);
-      break;
-
-   case ir_unop_exp2:
-      emit_math(SHADER_OPCODE_EXP2, this->result, op[0]);
-      break;
-   case ir_unop_log2:
-      emit_math(SHADER_OPCODE_LOG2, this->result, op[0]);
-      break;
-   case ir_unop_exp:
-   case ir_unop_log:
-      unreachable("not reached: should be handled by ir_explog_to_explog2");
-   case ir_unop_sin:
-      emit_math(SHADER_OPCODE_SIN, this->result, op[0]);
-      break;
-   case ir_unop_cos:
-      emit_math(SHADER_OPCODE_COS, this->result, op[0]);
-      break;
-
-   case ir_unop_dFdx:
-      /* Select one of the two opcodes based on the glHint value. */
-      if (fs_key->high_quality_derivatives)
-         emit(FS_OPCODE_DDX_FINE, this->result, op[0]);
-      else
-         emit(FS_OPCODE_DDX_COARSE, this->result, op[0]);
-      break;
-
-   case ir_unop_dFdx_coarse:
-      emit(FS_OPCODE_DDX_COARSE, this->result, op[0]);
-      break;
-
-   case ir_unop_dFdx_fine:
-      emit(FS_OPCODE_DDX_FINE, this->result, op[0]);
-      break;
-
-   case ir_unop_dFdy:
-      /* Select one of the two opcodes based on the glHint value. */
-      if (fs_key->high_quality_derivatives)
-         emit(FS_OPCODE_DDY_FINE, result, op[0], fs_reg(fs_key->render_to_fbo));
-      else
-         emit(FS_OPCODE_DDY_COARSE, result, op[0], fs_reg(fs_key->render_to_fbo));
-      break;
-
-   case ir_unop_dFdy_coarse:
-      emit(FS_OPCODE_DDY_COARSE, result, op[0], fs_reg(fs_key->render_to_fbo));
-      break;
-
-   case ir_unop_dFdy_fine:
-      emit(FS_OPCODE_DDY_FINE, result, op[0], fs_reg(fs_key->render_to_fbo));
-      break;
-
-   case ir_binop_add:
-      emit(ADD(this->result, op[0], op[1]));
-      break;
-   case ir_binop_sub:
-      unreachable("not reached: should be handled by ir_sub_to_add_neg");
-
-   case ir_binop_mul:
-      emit(MUL(this->result, op[0], op[1]));
-      break;
-   case ir_binop_imul_high: {
-      if (devinfo->gen >= 7)
-         no16("SIMD16 explicit accumulator operands unsupported\n");
-
-      struct brw_reg acc = retype(brw_acc_reg(dispatch_width),
-                                  this->result.type);
-
-      fs_inst *mul = emit(MUL(acc, op[0], op[1]));
-      emit(MACH(this->result, op[0], op[1]));
-
-      /* Until Gen8, integer multiplies read 32-bits from one source, and
-       * 16-bits from the other, and relying on the MACH instruction to
-       * generate the high bits of the result.
-       *
-       * On Gen8, the multiply instruction does a full 32x32-bit multiply,
-       * but in order to do a 64x64-bit multiply we have to simulate the
-       * previous behavior and then use a MACH instruction.
-       *
-       * FINISHME: Don't use source modifiers on src1.
-       */
-      if (devinfo->gen >= 8) {
-         assert(mul->src[1].type == BRW_REGISTER_TYPE_D ||
-                mul->src[1].type == BRW_REGISTER_TYPE_UD);
-         if (mul->src[1].type == BRW_REGISTER_TYPE_D) {
-            mul->src[1].type = BRW_REGISTER_TYPE_W;
-            mul->src[1].stride = 2;
-         } else {
-            mul->src[1].type = BRW_REGISTER_TYPE_UW;
-            mul->src[1].stride = 2;
-         }
-      }
-
-      break;
-   }
-   case ir_binop_div:
-      /* Floating point should be lowered by DIV_TO_MUL_RCP in the compiler. */
-      assert(ir->type->is_integer());
-      emit_math(SHADER_OPCODE_INT_QUOTIENT, this->result, op[0], op[1]);
-      break;
-   case ir_binop_carry: {
-      if (devinfo->gen >= 7)
-         no16("SIMD16 explicit accumulator operands unsupported\n");
-
-      struct brw_reg acc = retype(brw_acc_reg(dispatch_width),
-                                  BRW_REGISTER_TYPE_UD);
-
-      emit(ADDC(reg_null_ud, op[0], op[1]));
-      emit(MOV(this->result, fs_reg(acc)));
-      break;
-   }
-   case ir_binop_borrow: {
-      if (devinfo->gen >= 7)
-         no16("SIMD16 explicit accumulator operands unsupported\n");
-
-      struct brw_reg acc = retype(brw_acc_reg(dispatch_width),
-                                  BRW_REGISTER_TYPE_UD);
-
-      emit(SUBB(reg_null_ud, op[0], op[1]));
-      emit(MOV(this->result, fs_reg(acc)));
-      break;
-   }
-   case ir_binop_mod:
-      /* Floating point should be lowered by MOD_TO_FLOOR in the compiler. */
-      assert(ir->type->is_integer());
-      emit_math(SHADER_OPCODE_INT_REMAINDER, this->result, op[0], op[1]);
-      break;
-
-   case ir_binop_less:
-   case ir_binop_greater:
-   case ir_binop_lequal:
-   case ir_binop_gequal:
-   case ir_binop_equal:
-   case ir_binop_all_equal:
-   case ir_binop_nequal:
-   case ir_binop_any_nequal:
-      if (devinfo->gen <= 5) {
-         resolve_bool_comparison(ir->operands[0], &op[0]);
-         resolve_bool_comparison(ir->operands[1], &op[1]);
-      }
-
-      emit(CMP(this->result, op[0], op[1],
-               brw_conditional_for_comparison(ir->operation)));
-      break;
-
-   case ir_binop_logic_xor:
-      emit(XOR(this->result, op[0], op[1]));
-      break;
-
-   case ir_binop_logic_or:
-      emit(OR(this->result, op[0], op[1]));
-      break;
-
-   case ir_binop_logic_and:
-      emit(AND(this->result, op[0], op[1]));
-      break;
-
-   case ir_binop_dot:
-   case ir_unop_any:
-      unreachable("not reached: should be handled by brw_fs_channel_expressions");
-
-   case ir_unop_noise:
-      unreachable("not reached: should be handled by lower_noise");
-
-   case ir_quadop_vector:
-      unreachable("not reached: should be handled by lower_quadop_vector");
-
-   case ir_binop_vector_extract:
-      unreachable("not reached: should be handled by lower_vec_index_to_cond_assign()");
-
-   case ir_triop_vector_insert:
-      unreachable("not reached: should be handled by lower_vector_insert()");
-
-   case ir_binop_ldexp:
-      unreachable("not reached: should be handled by ldexp_to_arith()");
-
-   case ir_unop_sqrt:
-      emit_math(SHADER_OPCODE_SQRT, this->result, op[0]);
-      break;
-
-   case ir_unop_rsq:
-      emit_math(SHADER_OPCODE_RSQ, this->result, op[0]);
-      break;
-
-   case ir_unop_bitcast_i2f:
-   case ir_unop_bitcast_u2f:
-      op[0].type = BRW_REGISTER_TYPE_F;
-      this->result = op[0];
-      break;
-   case ir_unop_i2u:
-   case ir_unop_bitcast_f2u:
-      op[0].type = BRW_REGISTER_TYPE_UD;
-      this->result = op[0];
-      break;
-   case ir_unop_u2i:
-   case ir_unop_bitcast_f2i:
-      op[0].type = BRW_REGISTER_TYPE_D;
-      this->result = op[0];
-      break;
-   case ir_unop_i2f:
-   case ir_unop_u2f:
-   case ir_unop_f2i:
-   case ir_unop_f2u:
-      emit(MOV(this->result, op[0]));
-      break;
-
-   case ir_unop_b2i:
-      emit(AND(this->result, op[0], fs_reg(1)));
-      break;
-   case ir_unop_b2f:
-      if (devinfo->gen <= 5) {
-         resolve_bool_comparison(ir->operands[0], &op[0]);
-      }
-      op[0].type = BRW_REGISTER_TYPE_D;
-      this->result.type = BRW_REGISTER_TYPE_D;
-      emit(AND(this->result, op[0], fs_reg(0x3f800000u)));
-      this->result.type = BRW_REGISTER_TYPE_F;
-      break;
-
-   case ir_unop_f2b:
-      emit(CMP(this->result, op[0], fs_reg(0.0f), BRW_CONDITIONAL_NZ));
-      break;
-   case ir_unop_i2b:
-      emit(CMP(this->result, op[0], fs_reg(0), BRW_CONDITIONAL_NZ));
-      break;
-
-   case ir_unop_trunc:
-      emit(RNDZ(this->result, op[0]));
-      break;
-   case ir_unop_ceil: {
-         fs_reg tmp = vgrf(ir->type);
-         op[0].negate = !op[0].negate;
-         emit(RNDD(tmp, op[0]));
-         tmp.negate = true;
-         emit(MOV(this->result, tmp));
-      }
-      break;
-   case ir_unop_floor:
-      emit(RNDD(this->result, op[0]));
-      break;
-   case ir_unop_fract:
-      emit(FRC(this->result, op[0]));
-      break;
-   case ir_unop_round_even:
-      emit(RNDE(this->result, op[0]));
-      break;
-
-   case ir_binop_min:
-   case ir_binop_max:
-      resolve_ud_negate(&op[0]);
-      resolve_ud_negate(&op[1]);
-      emit_minmax(ir->operation == ir_binop_min ?
-                  BRW_CONDITIONAL_L : BRW_CONDITIONAL_GE,
-                  this->result, op[0], op[1]);
-      break;
-   case ir_unop_pack_snorm_2x16:
-   case ir_unop_pack_snorm_4x8:
-   case ir_unop_pack_unorm_2x16:
-   case ir_unop_pack_unorm_4x8:
-   case ir_unop_unpack_snorm_2x16:
-   case ir_unop_unpack_snorm_4x8:
-   case ir_unop_unpack_unorm_2x16:
-   case ir_unop_unpack_unorm_4x8:
-   case ir_unop_unpack_half_2x16:
-   case ir_unop_pack_half_2x16:
-      unreachable("not reached: should be handled by lower_packing_builtins");
-   case ir_unop_unpack_half_2x16_split_x:
-      emit(FS_OPCODE_UNPACK_HALF_2x16_SPLIT_X, this->result, op[0]);
-      break;
-   case ir_unop_unpack_half_2x16_split_y:
-      emit(FS_OPCODE_UNPACK_HALF_2x16_SPLIT_Y, this->result, op[0]);
-      break;
-   case ir_binop_pow:
-      emit_math(SHADER_OPCODE_POW, this->result, op[0], op[1]);
-      break;
-
-   case ir_unop_bitfield_reverse:
-      emit(BFREV(this->result, op[0]));
-      break;
-   case ir_unop_bit_count:
-      emit(CBIT(this->result, op[0]));
-      break;
-   case ir_unop_find_msb:
-      temp = vgrf(glsl_type::uint_type);
-      emit(FBH(temp, op[0]));
-
-      /* FBH counts from the MSB side, while GLSL's findMSB() wants the count
-       * from the LSB side. If FBH didn't return an error (0xFFFFFFFF), then
-       * subtract the result from 31 to convert the MSB count into an LSB count.
-       */
-
-      /* FBH only supports UD type for dst, so use a MOV to convert UD to D. */
-      emit(MOV(this->result, temp));
-      emit(CMP(reg_null_d, this->result, fs_reg(-1), BRW_CONDITIONAL_NZ));
-
-      temp.negate = true;
-      inst = emit(ADD(this->result, temp, fs_reg(31)));
-      inst->predicate = BRW_PREDICATE_NORMAL;
-      break;
-   case ir_unop_find_lsb:
-      emit(FBL(this->result, op[0]));
-      break;
-   case ir_unop_saturate:
-      inst = emit(MOV(this->result, op[0]));
-      inst->saturate = true;
-      break;
-   case ir_triop_bitfield_extract:
-      /* Note that the instruction's argument order is reversed from GLSL
-       * and the IR.
-       */
-      emit(BFE(this->result, op[2], op[1], op[0]));
-      break;
-   case ir_binop_bfm:
-      emit(BFI1(this->result, op[0], op[1]));
-      break;
-   case ir_triop_bfi:
-      emit(BFI2(this->result, op[0], op[1], op[2]));
-      break;
-   case ir_quadop_bitfield_insert:
-      unreachable("not reached: should be handled by "
-              "lower_instructions::bitfield_insert_to_bfm_bfi");
-
-   case ir_unop_bit_not:
-      emit(NOT(this->result, op[0]));
-      break;
-   case ir_binop_bit_and:
-      emit(AND(this->result, op[0], op[1]));
-      break;
-   case ir_binop_bit_xor:
-      emit(XOR(this->result, op[0], op[1]));
-      break;
-   case ir_binop_bit_or:
-      emit(OR(this->result, op[0], op[1]));
-      break;
-
-   case ir_binop_lshift:
-      emit(SHL(this->result, op[0], op[1]));
-      break;
-
-   case ir_binop_rshift:
-      if (ir->type->base_type == GLSL_TYPE_INT)
-	 emit(ASR(this->result, op[0], op[1]));
-      else
-	 emit(SHR(this->result, op[0], op[1]));
-      break;
-   case ir_binop_pack_half_2x16_split:
-      emit(FS_OPCODE_PACK_HALF_2x16_SPLIT, this->result, op[0], op[1]);
-      break;
-   case ir_binop_ubo_load: {
-      /* This IR node takes a constant uniform block and a constant or
-       * variable byte offset within the block and loads a vector from that.
-       */
-      ir_constant *const_uniform_block = ir->operands[0]->as_constant();
-      ir_constant *const_offset = ir->operands[1]->as_constant();
-      fs_reg surf_index;
-
-      if (const_uniform_block) {
-         /* The block index is a constant, so just emit the binding table entry
-          * as an immediate.
-          */
-         surf_index = fs_reg(stage_prog_data->binding_table.ubo_start +
-                                 const_uniform_block->value.u[0]);
-      } else {
-         /* The block index is not a constant. Evaluate the index expression
-          * per-channel and add the base UBO index; we have to select a value
-          * from any live channel.
-          */
-         surf_index = vgrf(glsl_type::uint_type);
-         emit(ADD(surf_index, op[0],
-                  fs_reg(stage_prog_data->binding_table.ubo_start)));
-         emit_uniformize(surf_index, surf_index);
-
-         /* Assume this may touch any UBO. It would be nice to provide
-          * a tighter bound, but the array information is already lowered away.
-          */
-         brw_mark_surface_used(prog_data,
-                               stage_prog_data->binding_table.ubo_start +
-                               shader_prog->NumUniformBlocks - 1);
-      }
-
-      if (const_offset) {
-         fs_reg packed_consts = vgrf(glsl_type::float_type);
-         packed_consts.type = result.type;
-
-         fs_reg const_offset_reg = fs_reg(const_offset->value.u[0] & ~15);
-         emit(new(mem_ctx) fs_inst(FS_OPCODE_UNIFORM_PULL_CONSTANT_LOAD, 8,
-                                   packed_consts, surf_index, const_offset_reg));
-
-         for (int i = 0; i < ir->type->vector_elements; i++) {
-            packed_consts.set_smear(const_offset->value.u[0] % 16 / 4 + i);
-
-            /* The std140 packing rules don't allow vectors to cross 16-byte
-             * boundaries, and a reg is 32 bytes.
-             */
-            assert(packed_consts.subreg_offset < 32);
-
-            /* UBO bools are any nonzero value.  We consider bools to be
-             * values with the low bit set to 1.  Convert them using CMP.
-             */
-            if (ir->type->base_type == GLSL_TYPE_BOOL) {
-               emit(CMP(result, packed_consts, fs_reg(0u), BRW_CONDITIONAL_NZ));
-            } else {
-               emit(MOV(result, packed_consts));
-            }
-
-            result = offset(result, 1);
-         }
-      } else {
-         /* Turn the byte offset into a dword offset. */
-         fs_reg base_offset = vgrf(glsl_type::int_type);
-         emit(SHR(base_offset, op[1], fs_reg(2)));
-
-         for (int i = 0; i < ir->type->vector_elements; i++) {
-            emit(VARYING_PULL_CONSTANT_LOAD(result, surf_index,
-                                            base_offset, i));
-
-            if (ir->type->base_type == GLSL_TYPE_BOOL)
-               emit(CMP(result, result, fs_reg(0), BRW_CONDITIONAL_NZ));
-
-            result = offset(result, 1);
-         }
-      }
-
-      result.reg_offset = 0;
-      break;
-   }
-
-   case ir_triop_fma:
-      /* Note that the instruction's argument order is reversed from GLSL
-       * and the IR.
-       */
-      emit(MAD(this->result, op[2], op[1], op[0]));
-      break;
-
-   case ir_triop_lrp:
-      emit_lrp(this->result, op[0], op[1], op[2]);
-      break;
-
-   case ir_triop_csel:
-   case ir_unop_interpolate_at_centroid:
-   case ir_binop_interpolate_at_offset:
-   case ir_binop_interpolate_at_sample:
-      unreachable("already handled above");
-      break;
-
-   case ir_unop_d2f:
-   case ir_unop_f2d:
-   case ir_unop_d2i:
-   case ir_unop_i2d:
-   case ir_unop_d2u:
-   case ir_unop_u2d:
-   case ir_unop_d2b:
-   case ir_unop_pack_double_2x32:
-   case ir_unop_unpack_double_2x32:
-   case ir_unop_frexp_sig:
-   case ir_unop_frexp_exp:
-      unreachable("fp64 todo");
-      break;
-   }
-}
-
-void
-fs_visitor::emit_assignment_writes(fs_reg &l, fs_reg &r,
-				   const glsl_type *type, bool predicated)
-{
-   switch (type->base_type) {
-   case GLSL_TYPE_FLOAT:
-   case GLSL_TYPE_UINT:
-   case GLSL_TYPE_INT:
-   case GLSL_TYPE_BOOL:
-      for (unsigned int i = 0; i < type->components(); i++) {
-	 l.type = brw_type_for_base_type(type);
-	 r.type = brw_type_for_base_type(type);
-
-	 if (predicated || !l.equals(r)) {
-	    fs_inst *inst = emit(MOV(l, r));
-	    inst->predicate = predicated ? BRW_PREDICATE_NORMAL : BRW_PREDICATE_NONE;
-	 }
-
-	 l = offset(l, 1);
-	 r = offset(r, 1);
-      }
-      break;
-   case GLSL_TYPE_ARRAY:
-      for (unsigned int i = 0; i < type->length; i++) {
-	 emit_assignment_writes(l, r, type->fields.array, predicated);
-      }
-      break;
-
-   case GLSL_TYPE_STRUCT:
-      for (unsigned int i = 0; i < type->length; i++) {
-	 emit_assignment_writes(l, r, type->fields.structure[i].type,
-				predicated);
-      }
-      break;
-
-   case GLSL_TYPE_SAMPLER:
-   case GLSL_TYPE_IMAGE:
-   case GLSL_TYPE_ATOMIC_UINT:
-      break;
-
-   case GLSL_TYPE_DOUBLE:
-   case GLSL_TYPE_VOID:
-   case GLSL_TYPE_ERROR:
-   case GLSL_TYPE_INTERFACE:
-      unreachable("not reached");
-   }
-}
-
-/* If the RHS processing resulted in an instruction generating a
- * temporary value, and it would be easy to rewrite the instruction to
- * generate its result right into the LHS instead, do so.  This ends
- * up reliably removing instructions where it can be tricky to do so
- * later without real UD chain information.
- */
-bool
-fs_visitor::try_rewrite_rhs_to_dst(ir_assignment *ir,
-                                   fs_reg dst,
-                                   fs_reg src,
-                                   fs_inst *pre_rhs_inst,
-                                   fs_inst *last_rhs_inst)
-{
-   /* Only attempt if we're doing a direct assignment. */
-   if (ir->condition ||
-       !(ir->lhs->type->is_scalar() ||
-        (ir->lhs->type->is_vector() &&
-         ir->write_mask == (1 << ir->lhs->type->vector_elements) - 1)))
-      return false;
-
-   /* Make sure the last instruction generated our source reg. */
-   fs_inst *modify = get_instruction_generating_reg(pre_rhs_inst,
-						    last_rhs_inst,
-						    src);
-   if (!modify)
-      return false;
-
-   /* If last_rhs_inst wrote a different number of components than our LHS,
-    * we can't safely rewrite it.
-    */
-   if (alloc.sizes[dst.reg] != modify->regs_written)
-      return false;
-
-   /* Success!  Rewrite the instruction. */
-   modify->dst = dst;
-
-   return true;
-}
-
-void
-fs_visitor::visit(ir_assignment *ir)
-{
-   fs_reg l, r;
-   fs_inst *inst;
-
-   /* FINISHME: arrays on the lhs */
-   ir->lhs->accept(this);
-   l = this->result;
-
-   fs_inst *pre_rhs_inst = (fs_inst *) this->instructions.get_tail();
-
-   ir->rhs->accept(this);
-   r = this->result;
-
-   fs_inst *last_rhs_inst = (fs_inst *) this->instructions.get_tail();
-
-   assert(l.file != BAD_FILE);
-   assert(r.file != BAD_FILE);
-
-   if (try_rewrite_rhs_to_dst(ir, l, r, pre_rhs_inst, last_rhs_inst))
-      return;
-
-   if (ir->condition) {
-      emit_bool_to_cond_code(ir->condition);
-   }
-
-   if (ir->lhs->type->is_scalar() ||
-       ir->lhs->type->is_vector()) {
-      for (int i = 0; i < ir->lhs->type->vector_elements; i++) {
-	 if (ir->write_mask & (1 << i)) {
-	    inst = emit(MOV(l, r));
-	    if (ir->condition)
-	       inst->predicate = BRW_PREDICATE_NORMAL;
-	    r = offset(r, 1);
-	 }
-	 l = offset(l, 1);
-      }
-   } else {
-      emit_assignment_writes(l, r, ir->lhs->type, ir->condition != NULL);
-   }
-}
-
 fs_inst *
 fs_visitor::emit_texture_gen4(ir_texture_opcode op, fs_reg dst,
                               fs_reg coordinate, int coord_components,
@@ -2257,156 +966,6 @@ fs_visitor::emit_texture(ir_texture_opcode op,
    swizzle_result(op, dest_type->vector_elements, dst, sampler);
 }
 
-void
-fs_visitor::visit(ir_texture *ir)
-{
-   uint32_t sampler =
-      _mesa_get_sampler_uniform_value(ir->sampler, shader_prog, prog);
-
-   ir_rvalue *nonconst_sampler_index =
-      _mesa_get_sampler_array_nonconst_index(ir->sampler);
-
-   /* Handle non-constant sampler array indexing */
-   fs_reg sampler_reg;
-   if (nonconst_sampler_index) {
-      /* The highest sampler which may be used by this operation is
-       * the last element of the array. Mark it here, because the generator
-       * doesn't have enough information to determine the bound.
-       */
-      uint32_t array_size = ir->sampler->as_dereference_array()
-         ->array->type->array_size();
-
-      uint32_t max_used = sampler + array_size - 1;
-      if (ir->op == ir_tg4 && devinfo->gen < 8) {
-         max_used += stage_prog_data->binding_table.gather_texture_start;
-      } else {
-         max_used += stage_prog_data->binding_table.texture_start;
-      }
-
-      brw_mark_surface_used(prog_data, max_used);
-
-      /* Emit code to evaluate the actual indexing expression */
-      nonconst_sampler_index->accept(this);
-      fs_reg temp = vgrf(glsl_type::uint_type);
-      emit(ADD(temp, this->result, fs_reg(sampler)));
-      emit_uniformize(temp, temp);
-
-      sampler_reg = temp;
-   } else {
-      /* Single sampler, or constant array index; the indexing expression
-       * is just an immediate.
-       */
-      sampler_reg = fs_reg(sampler);
-   }
-
-   /* FINISHME: We're failing to recompile our programs when the sampler is
-    * updated.  This only matters for the texture rectangle scale parameters
-    * (pre-gen6, or gen6+ with GL_CLAMP).
-    */
-   int texunit = prog->SamplerUnits[sampler];
-
-   /* Should be lowered by do_lower_texture_projection */
-   assert(!ir->projector);
-
-   /* Should be lowered */
-   assert(!ir->offset || !ir->offset->type->is_array());
-
-   /* Generate code to compute all the subexpression trees.  This has to be
-    * done before loading any values into MRFs for the sampler message since
-    * generating these values may involve SEND messages that need the MRFs.
-    */
-   fs_reg coordinate;
-   int coord_components = 0;
-   if (ir->coordinate) {
-      coord_components = ir->coordinate->type->vector_elements;
-      ir->coordinate->accept(this);
-      coordinate = this->result;
-   }
-
-   fs_reg shadow_comparitor;
-   if (ir->shadow_comparitor) {
-      ir->shadow_comparitor->accept(this);
-      shadow_comparitor = this->result;
-   }
-
-   fs_reg offset_value;
-   if (ir->offset) {
-      ir_constant *const_offset = ir->offset->as_constant();
-      if (const_offset) {
-         /* Store the header bitfield in an IMM register.  This allows us to
-          * use offset_value.file to distinguish between no offset, a constant
-          * offset, and a non-constant offset.
-          */
-         offset_value =
-            fs_reg(brw_texture_offset(const_offset->value.i,
-                                      const_offset->type->vector_elements));
-      } else {
-         ir->offset->accept(this);
-         offset_value = this->result;
-      }
-   }
-
-   fs_reg lod, lod2, sample_index, mcs;
-   int grad_components = 0;
-   switch (ir->op) {
-   case ir_tex:
-   case ir_lod:
-   case ir_tg4:
-   case ir_query_levels:
-      break;
-   case ir_txb:
-      ir->lod_info.bias->accept(this);
-      lod = this->result;
-      break;
-   case ir_txd:
-      ir->lod_info.grad.dPdx->accept(this);
-      lod = this->result;
-
-      ir->lod_info.grad.dPdy->accept(this);
-      lod2 = this->result;
-
-      grad_components = ir->lod_info.grad.dPdx->type->vector_elements;
-      break;
-   case ir_txf:
-   case ir_txl:
-   case ir_txs:
-      ir->lod_info.lod->accept(this);
-      lod = this->result;
-      break;
-   case ir_txf_ms:
-      ir->lod_info.sample_index->accept(this);
-      sample_index = this->result;
-
-      if (devinfo->gen >= 7 &&
-          key_tex->compressed_multisample_layout_mask & (1 << sampler)) {
-         mcs = emit_mcs_fetch(coordinate, ir->coordinate->type->vector_elements,
-                              sampler_reg);
-      } else {
-         mcs = fs_reg(0u);
-      }
-      break;
-   default:
-      unreachable("Unrecognized texture opcode");
-   };
-
-   int gather_component = 0;
-   if (ir->op == ir_tg4)
-      gather_component = ir->lod_info.component->as_constant()->value.i[0];
-
-   bool is_rect =
-      ir->sampler->type->sampler_dimensionality == GLSL_SAMPLER_DIM_RECT;
-
-   bool is_cube_array =
-      ir->sampler->type->sampler_dimensionality == GLSL_SAMPLER_DIM_CUBE &&
-      ir->sampler->type->sampler_array;
-
-   emit_texture(ir->op, ir->type, coordinate, coord_components,
-                shadow_comparitor, lod, lod2, grad_components,
-                sample_index, offset_value, mcs,
-                gather_component, is_cube_array, is_rect, sampler,
-                sampler_reg, texunit);
-}
-
 /**
  * Apply workarounds for Gen6 gather with UINT/SINT
  */
@@ -2506,449 +1065,6 @@ fs_visitor::swizzle_result(ir_texture_opcode op, int dest_components,
    }
 }
 
-void
-fs_visitor::visit(ir_swizzle *ir)
-{
-   ir->val->accept(this);
-   fs_reg val = this->result;
-
-   if (ir->type->vector_elements == 1) {
-      this->result = offset(this->result, ir->mask.x);
-      return;
-   }
-
-   fs_reg result = vgrf(ir->type);
-   this->result = result;
-
-   for (unsigned int i = 0; i < ir->type->vector_elements; i++) {
-      fs_reg channel = val;
-      int swiz = 0;
-
-      switch (i) {
-      case 0:
-	 swiz = ir->mask.x;
-	 break;
-      case 1:
-	 swiz = ir->mask.y;
-	 break;
-      case 2:
-	 swiz = ir->mask.z;
-	 break;
-      case 3:
-	 swiz = ir->mask.w;
-	 break;
-      }
-
-      emit(MOV(result, offset(channel, swiz)));
-      result = offset(result, 1);
-   }
-}
-
-void
-fs_visitor::visit(ir_discard *ir)
-{
-   /* We track our discarded pixels in f0.1.  By predicating on it, we can
-    * update just the flag bits that aren't yet discarded.  If there's no
-    * condition, we emit a CMP of g0 != g0, so all currently executing
-    * channels will get turned off.
-    */
-   fs_inst *cmp;
-   if (ir->condition) {
-      emit_bool_to_cond_code(ir->condition);
-      cmp = (fs_inst *) this->instructions.get_tail();
-      cmp->conditional_mod = brw_negate_cmod(cmp->conditional_mod);
-   } else {
-      fs_reg some_reg = fs_reg(retype(brw_vec8_grf(0, 0),
-                                      BRW_REGISTER_TYPE_UW));
-      cmp = emit(CMP(reg_null_f, some_reg, some_reg, BRW_CONDITIONAL_NZ));
-   }
-   cmp->predicate = BRW_PREDICATE_NORMAL;
-   cmp->flag_subreg = 1;
-
-   if (devinfo->gen >= 6) {
-      emit_discard_jump();
-   }
-}
-
-void
-fs_visitor::visit(ir_constant *ir)
-{
-   /* Set this->result to reg at the bottom of the function because some code
-    * paths will cause this visitor to be applied to other fields.  This will
-    * cause the value stored in this->result to be modified.
-    *
-    * Make reg constant so that it doesn't get accidentally modified along the
-    * way.  Yes, I actually had this problem. :(
-    */
-   const fs_reg reg = vgrf(ir->type);
-   fs_reg dst_reg = reg;
-
-   if (ir->type->is_array()) {
-      const unsigned size = type_size(ir->type->fields.array);
-
-      for (unsigned i = 0; i < ir->type->length; i++) {
-	 ir->array_elements[i]->accept(this);
-	 fs_reg src_reg = this->result;
-
-	 dst_reg.type = src_reg.type;
-	 for (unsigned j = 0; j < size; j++) {
-	    emit(MOV(dst_reg, src_reg));
-	    src_reg = offset(src_reg, 1);
-	    dst_reg = offset(dst_reg, 1);
-	 }
-      }
-   } else if (ir->type->is_record()) {
-      foreach_in_list(ir_constant, field, &ir->components) {
-	 const unsigned size = type_size(field->type);
-
-	 field->accept(this);
-	 fs_reg src_reg = this->result;
-
-	 dst_reg.type = src_reg.type;
-	 for (unsigned j = 0; j < size; j++) {
-	    emit(MOV(dst_reg, src_reg));
-	    src_reg = offset(src_reg, 1);
-	    dst_reg = offset(dst_reg, 1);
-	 }
-      }
-   } else {
-      const unsigned size = type_size(ir->type);
-
-      for (unsigned i = 0; i < size; i++) {
-	 switch (ir->type->base_type) {
-	 case GLSL_TYPE_FLOAT:
-	    emit(MOV(dst_reg, fs_reg(ir->value.f[i])));
-	    break;
-	 case GLSL_TYPE_UINT:
-	    emit(MOV(dst_reg, fs_reg(ir->value.u[i])));
-	    break;
-	 case GLSL_TYPE_INT:
-	    emit(MOV(dst_reg, fs_reg(ir->value.i[i])));
-	    break;
-	 case GLSL_TYPE_BOOL:
-            emit(MOV(dst_reg, fs_reg(ir->value.b[i] != 0 ? ~0 : 0)));
-	    break;
-	 default:
-	    unreachable("Non-float/uint/int/bool constant");
-	 }
-	 dst_reg = offset(dst_reg, 1);
-      }
-   }
-
-   this->result = reg;
-}
-
-void
-fs_visitor::emit_bool_to_cond_code(ir_rvalue *ir)
-{
-   ir_expression *expr = ir->as_expression();
-
-   if (!expr || expr->operation == ir_binop_ubo_load) {
-      ir->accept(this);
-
-      fs_inst *inst = emit(AND(reg_null_d, this->result, fs_reg(1)));
-      inst->conditional_mod = BRW_CONDITIONAL_NZ;
-      return;
-   }
-
-   fs_reg op[3];
-
-   assert(expr->get_num_operands() <= 3);
-   for (unsigned int i = 0; i < expr->get_num_operands(); i++) {
-      assert(expr->operands[i]->type->is_scalar());
-
-      expr->operands[i]->accept(this);
-      op[i] = this->result;
-
-      resolve_ud_negate(&op[i]);
-   }
-
-   emit_bool_to_cond_code_of_reg(expr, op);
-}
-
-void
-fs_visitor::emit_bool_to_cond_code_of_reg(ir_expression *expr, fs_reg op[3])
-{
-   fs_inst *inst;
-
-   switch (expr->operation) {
-   case ir_unop_logic_not:
-      inst = emit(AND(reg_null_d, op[0], fs_reg(1)));
-      inst->conditional_mod = BRW_CONDITIONAL_Z;
-      break;
-
-   case ir_binop_logic_xor:
-      if (devinfo->gen <= 5) {
-         fs_reg temp = vgrf(expr->type);
-         emit(XOR(temp, op[0], op[1]));
-         inst = emit(AND(reg_null_d, temp, fs_reg(1)));
-      } else {
-         inst = emit(XOR(reg_null_d, op[0], op[1]));
-      }
-      inst->conditional_mod = BRW_CONDITIONAL_NZ;
-      break;
-
-   case ir_binop_logic_or:
-      if (devinfo->gen <= 5) {
-         fs_reg temp = vgrf(expr->type);
-         emit(OR(temp, op[0], op[1]));
-         inst = emit(AND(reg_null_d, temp, fs_reg(1)));
-      } else {
-         inst = emit(OR(reg_null_d, op[0], op[1]));
-      }
-      inst->conditional_mod = BRW_CONDITIONAL_NZ;
-      break;
-
-   case ir_binop_logic_and:
-      if (devinfo->gen <= 5) {
-         fs_reg temp = vgrf(expr->type);
-         emit(AND(temp, op[0], op[1]));
-         inst = emit(AND(reg_null_d, temp, fs_reg(1)));
-      } else {
-         inst = emit(AND(reg_null_d, op[0], op[1]));
-      }
-      inst->conditional_mod = BRW_CONDITIONAL_NZ;
-      break;
-
-   case ir_unop_f2b:
-      if (devinfo->gen >= 6) {
-         emit(CMP(reg_null_d, op[0], fs_reg(0.0f), BRW_CONDITIONAL_NZ));
-      } else {
-         inst = emit(MOV(reg_null_f, op[0]));
-         inst->conditional_mod = BRW_CONDITIONAL_NZ;
-      }
-      break;
-
-   case ir_unop_i2b:
-      if (devinfo->gen >= 6) {
-         emit(CMP(reg_null_d, op[0], fs_reg(0), BRW_CONDITIONAL_NZ));
-      } else {
-         inst = emit(MOV(reg_null_d, op[0]));
-         inst->conditional_mod = BRW_CONDITIONAL_NZ;
-      }
-      break;
-
-   case ir_binop_greater:
-   case ir_binop_gequal:
-   case ir_binop_less:
-   case ir_binop_lequal:
-   case ir_binop_equal:
-   case ir_binop_all_equal:
-   case ir_binop_nequal:
-   case ir_binop_any_nequal:
-      if (devinfo->gen <= 5) {
-         resolve_bool_comparison(expr->operands[0], &op[0]);
-         resolve_bool_comparison(expr->operands[1], &op[1]);
-      }
-
-      emit(CMP(reg_null_d, op[0], op[1],
-               brw_conditional_for_comparison(expr->operation)));
-      break;
-
-   case ir_triop_csel: {
-      /* Expand the boolean condition into the flag register. */
-      inst = emit(MOV(reg_null_d, op[0]));
-      inst->conditional_mod = BRW_CONDITIONAL_NZ;
-
-      /* Select which boolean to return. */
-      fs_reg temp = vgrf(expr->operands[1]->type);
-      inst = emit(SEL(temp, op[1], op[2]));
-      inst->predicate = BRW_PREDICATE_NORMAL;
-
-      /* Expand the result to a condition code. */
-      inst = emit(MOV(reg_null_d, temp));
-      inst->conditional_mod = BRW_CONDITIONAL_NZ;
-      break;
-   }
-
-   default:
-      unreachable("not reached");
-   }
-}
-
-/**
- * Emit a gen6 IF statement with the comparison folded into the IF
- * instruction.
- */
-void
-fs_visitor::emit_if_gen6(ir_if *ir)
-{
-   ir_expression *expr = ir->condition->as_expression();
-
-   if (expr && expr->operation != ir_binop_ubo_load) {
-      fs_reg op[3];
-      fs_inst *inst;
-      fs_reg temp;
-
-      assert(expr->get_num_operands() <= 3);
-      for (unsigned int i = 0; i < expr->get_num_operands(); i++) {
-	 assert(expr->operands[i]->type->is_scalar());
-
-	 expr->operands[i]->accept(this);
-	 op[i] = this->result;
-      }
-
-      switch (expr->operation) {
-      case ir_unop_logic_not:
-         emit(IF(op[0], fs_reg(0), BRW_CONDITIONAL_Z));
-         return;
-
-      case ir_binop_logic_xor:
-         emit(IF(op[0], op[1], BRW_CONDITIONAL_NZ));
-         return;
-
-      case ir_binop_logic_or:
-         temp = vgrf(glsl_type::bool_type);
-         emit(OR(temp, op[0], op[1]));
-         emit(IF(temp, fs_reg(0), BRW_CONDITIONAL_NZ));
-         return;
-
-      case ir_binop_logic_and:
-         temp = vgrf(glsl_type::bool_type);
-         emit(AND(temp, op[0], op[1]));
-         emit(IF(temp, fs_reg(0), BRW_CONDITIONAL_NZ));
-         return;
-
-      case ir_unop_f2b:
-	 inst = emit(BRW_OPCODE_IF, reg_null_f, op[0], fs_reg(0));
-	 inst->conditional_mod = BRW_CONDITIONAL_NZ;
-	 return;
-
-      case ir_unop_i2b:
-	 emit(IF(op[0], fs_reg(0), BRW_CONDITIONAL_NZ));
-	 return;
-
-      case ir_binop_greater:
-      case ir_binop_gequal:
-      case ir_binop_less:
-      case ir_binop_lequal:
-      case ir_binop_equal:
-      case ir_binop_all_equal:
-      case ir_binop_nequal:
-      case ir_binop_any_nequal:
-         if (devinfo->gen <= 5) {
-            resolve_bool_comparison(expr->operands[0], &op[0]);
-            resolve_bool_comparison(expr->operands[1], &op[1]);
-         }
-
-	 emit(IF(op[0], op[1],
-                 brw_conditional_for_comparison(expr->operation)));
-	 return;
-
-      case ir_triop_csel: {
-         /* Expand the boolean condition into the flag register. */
-         fs_inst *inst = emit(MOV(reg_null_d, op[0]));
-         inst->conditional_mod = BRW_CONDITIONAL_NZ;
-
-         /* Select which boolean to use as the result. */
-         fs_reg temp = vgrf(expr->operands[1]->type);
-         inst = emit(SEL(temp, op[1], op[2]));
-         inst->predicate = BRW_PREDICATE_NORMAL;
-
-	 emit(IF(temp, fs_reg(0), BRW_CONDITIONAL_NZ));
-	 return;
-      }
-
-      default:
-	 unreachable("not reached");
-      }
-   }
-
-   ir->condition->accept(this);
-   emit(IF(this->result, fs_reg(0), BRW_CONDITIONAL_NZ));
-}
-
-bool
-fs_visitor::try_opt_frontfacing_ternary(ir_if *ir)
-{
-   ir_dereference_variable *deref = ir->condition->as_dereference_variable();
-   if (!deref || strcmp(deref->var->name, "gl_FrontFacing") != 0)
-      return false;
-
-   if (ir->then_instructions.length() != 1 ||
-       ir->else_instructions.length() != 1)
-      return false;
-
-   ir_assignment *then_assign =
-         ((ir_instruction *)ir->then_instructions.head)->as_assignment();
-   ir_assignment *else_assign =
-         ((ir_instruction *)ir->else_instructions.head)->as_assignment();
-
-   if (!then_assign || then_assign->condition ||
-       !else_assign || else_assign->condition ||
-       then_assign->write_mask != else_assign->write_mask ||
-       !then_assign->lhs->equals(else_assign->lhs))
-      return false;
-
-   ir_constant *then_rhs = then_assign->rhs->as_constant();
-   ir_constant *else_rhs = else_assign->rhs->as_constant();
-
-   if (!then_rhs || !else_rhs)
-      return false;
-
-   if (then_rhs->type->base_type != GLSL_TYPE_FLOAT)
-      return false;
-
-   if ((then_rhs->is_one() && else_rhs->is_negative_one()) ||
-       (else_rhs->is_one() && then_rhs->is_negative_one())) {
-      then_assign->lhs->accept(this);
-      fs_reg dst = this->result;
-      dst.type = BRW_REGISTER_TYPE_D;
-      fs_reg tmp = vgrf(glsl_type::int_type);
-
-      if (devinfo->gen >= 6) {
-         /* Bit 15 of g0.0 is 0 if the polygon is front facing. */
-         fs_reg g0 = fs_reg(retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_W));
-
-         /* For (gl_FrontFacing ? 1.0 : -1.0), emit:
-          *
-          *    or(8)  tmp.1<2>W  g0.0<0,1,0>W  0x00003f80W
-          *    and(8) dst<1>D    tmp<8,8,1>D   0xbf800000D
-          *
-          * and negate g0.0<0,1,0>W for (gl_FrontFacing ? -1.0 : 1.0).
-          */
-
-         if (then_rhs->is_negative_one()) {
-            assert(else_rhs->is_one());
-            g0.negate = true;
-         }
-
-         tmp.type = BRW_REGISTER_TYPE_W;
-         tmp.subreg_offset = 2;
-         tmp.stride = 2;
-
-         fs_inst *or_inst = emit(OR(tmp, g0, fs_reg(0x3f80)));
-         or_inst->src[1].type = BRW_REGISTER_TYPE_UW;
-
-         tmp.type = BRW_REGISTER_TYPE_D;
-         tmp.subreg_offset = 0;
-         tmp.stride = 1;
-      } else {
-         /* Bit 31 of g1.6 is 0 if the polygon is front facing. */
-         fs_reg g1_6 = fs_reg(retype(brw_vec1_grf(1, 6), BRW_REGISTER_TYPE_D));
-
-         /* For (gl_FrontFacing ? 1.0 : -1.0), emit:
-          *
-          *    or(8)  tmp<1>D  g1.6<0,1,0>D  0x3f800000D
-          *    and(8) dst<1>D  tmp<8,8,1>D   0xbf800000D
-          *
-          * and negate g1.6<0,1,0>D for (gl_FrontFacing ? -1.0 : 1.0).
-          */
-
-         if (then_rhs->is_negative_one()) {
-            assert(else_rhs->is_one());
-            g1_6.negate = true;
-         }
-
-         emit(OR(tmp, g1_6, fs_reg(0x3f800000)));
-      }
-      emit(AND(dst, tmp, fs_reg(0xbf800000)));
-      return true;
-   }
-
-   return false;
-}
-
 /**
  * Try to replace IF/MOV/ELSE/MOV/ENDIF with SEL.
  *
@@ -3039,178 +1155,6 @@ fs_visitor::try_replace_with_sel()
 }
 
 void
-fs_visitor::visit(ir_if *ir)
-{
-   if (try_opt_frontfacing_ternary(ir))
-      return;
-
-   /* Don't point the annotation at the if statement, because then it plus
-    * the then and else blocks get printed.
-    */
-   this->base_ir = ir->condition;
-
-   if (devinfo->gen == 6) {
-      emit_if_gen6(ir);
-   } else {
-      emit_bool_to_cond_code(ir->condition);
-
-      emit(IF(BRW_PREDICATE_NORMAL));
-   }
-
-   foreach_in_list(ir_instruction, ir_, &ir->then_instructions) {
-      this->base_ir = ir_;
-      ir_->accept(this);
-   }
-
-   if (!ir->else_instructions.is_empty()) {
-      emit(BRW_OPCODE_ELSE);
-
-      foreach_in_list(ir_instruction, ir_, &ir->else_instructions) {
-	 this->base_ir = ir_;
-	 ir_->accept(this);
-      }
-   }
-
-   emit(BRW_OPCODE_ENDIF);
-
-   if (!try_replace_with_sel() && devinfo->gen < 6) {
-      no16("Can't support (non-uniform) control flow on SIMD16\n");
-   }
-}
-
-void
-fs_visitor::visit(ir_loop *ir)
-{
-   if (devinfo->gen < 6) {
-      no16("Can't support (non-uniform) control flow on SIMD16\n");
-   }
-
-   this->base_ir = NULL;
-   emit(BRW_OPCODE_DO);
-
-   foreach_in_list(ir_instruction, ir_, &ir->body_instructions) {
-      this->base_ir = ir_;
-      ir_->accept(this);
-   }
-
-   this->base_ir = NULL;
-   emit(BRW_OPCODE_WHILE);
-}
-
-void
-fs_visitor::visit(ir_loop_jump *ir)
-{
-   switch (ir->mode) {
-   case ir_loop_jump::jump_break:
-      emit(BRW_OPCODE_BREAK);
-      break;
-   case ir_loop_jump::jump_continue:
-      emit(BRW_OPCODE_CONTINUE);
-      break;
-   }
-}
-
-void
-fs_visitor::visit_atomic_counter_intrinsic(ir_call *ir)
-{
-   ir_dereference *deref = static_cast<ir_dereference *>(
-      ir->actual_parameters.get_head());
-   ir_variable *location = deref->variable_referenced();
-   unsigned surf_index = (stage_prog_data->binding_table.abo_start +
-                          location->data.binding);
-
-   /* Calculate the surface offset */
-   fs_reg offset = vgrf(glsl_type::uint_type);
-   ir_dereference_array *deref_array = deref->as_dereference_array();
-
-   if (deref_array) {
-      deref_array->array_index->accept(this);
-
-      fs_reg tmp = vgrf(glsl_type::uint_type);
-      emit(MUL(tmp, this->result, fs_reg(ATOMIC_COUNTER_SIZE)));
-      emit(ADD(offset, tmp, fs_reg(location->data.atomic.offset)));
-   } else {
-      offset = fs_reg(location->data.atomic.offset);
-   }
-
-   /* Emit the appropriate machine instruction */
-   const char *callee = ir->callee->function_name();
-   ir->return_deref->accept(this);
-   fs_reg dst = this->result;
-
-   if (!strcmp("__intrinsic_atomic_read", callee)) {
-      emit_untyped_surface_read(surf_index, dst, offset);
-
-   } else if (!strcmp("__intrinsic_atomic_increment", callee)) {
-      emit_untyped_atomic(BRW_AOP_INC, surf_index, dst, offset,
-                          fs_reg(), fs_reg());
-
-   } else if (!strcmp("__intrinsic_atomic_predecrement", callee)) {
-      emit_untyped_atomic(BRW_AOP_PREDEC, surf_index, dst, offset,
-                          fs_reg(), fs_reg());
-   }
-}
-
-void
-fs_visitor::visit(ir_call *ir)
-{
-   const char *callee = ir->callee->function_name();
-
-   if (!strcmp("__intrinsic_atomic_read", callee) ||
-       !strcmp("__intrinsic_atomic_increment", callee) ||
-       !strcmp("__intrinsic_atomic_predecrement", callee)) {
-      visit_atomic_counter_intrinsic(ir);
-   } else {
-      unreachable("Unsupported intrinsic.");
-   }
-}
-
-void
-fs_visitor::visit(ir_return *)
-{
-   unreachable("FINISHME");
-}
-
-void
-fs_visitor::visit(ir_function *ir)
-{
-   /* Ignore function bodies other than main() -- we shouldn't see calls to
-    * them since they should all be inlined before we get to ir_to_mesa.
-    */
-   if (strcmp(ir->name, "main") == 0) {
-      const ir_function_signature *sig;
-      exec_list empty;
-
-      sig = ir->matching_signature(NULL, &empty, false);
-
-      assert(sig);
-
-      foreach_in_list(ir_instruction, ir_, &sig->body) {
-	 this->base_ir = ir_;
-	 ir_->accept(this);
-      }
-   }
-}
-
-void
-fs_visitor::visit(ir_function_signature *)
-{
-   unreachable("not reached");
-}
-
-void
-fs_visitor::visit(ir_emit_vertex *)
-{
-   unreachable("not reached");
-}
-
-void
-fs_visitor::visit(ir_end_primitive *)
-{
-   unreachable("not reached");
-}
-
-void
 fs_visitor::emit_untyped_atomic(unsigned atomic_op, unsigned surf_index,
                                 fs_reg dst, fs_reg offset, fs_reg src0,
                                 fs_reg src1)
@@ -4096,27 +2040,6 @@ fs_visitor::emit_cs_terminate()
    inst->eot = true;
 }
 
-/**
- * Resolve the result of a Gen4-5 CMP instruction to a proper boolean.
- *
- * CMP on Gen4-5 only sets the LSB of the result; the rest are undefined.
- * If we need a proper boolean value, we have to fix it up to be 0 or ~0.
- */
-void
-fs_visitor::resolve_bool_comparison(ir_rvalue *rvalue, fs_reg *reg)
-{
-   assert(devinfo->gen <= 5);
-
-   if (rvalue->type != glsl_type::bool_type)
-      return;
-
-   fs_reg and_result = vgrf(glsl_type::bool_type);
-   fs_reg neg_result = vgrf(glsl_type::bool_type);
-   emit(AND(and_result, *reg, fs_reg(1)));
-   emit(MOV(neg_result, negate(and_result)));
-   *reg = neg_result;
-}
-
 fs_visitor::fs_visitor(struct brw_context *brw,
                        void *mem_ctx,
                        gl_shader_stage stage,
@@ -4152,9 +2075,6 @@ fs_visitor::fs_visitor(struct brw_context *brw,
    this->failed = false;
    this->simd16_unsupported = false;
    this->no16_msg = NULL;
-   this->variable_ht = hash_table_ctor(0,
-                                       hash_table_pointer_hash,
-                                       hash_table_pointer_compare);
 
    this->nir_locals = NULL;
    this->nir_globals = NULL;
@@ -4189,5 +2109,4 @@ fs_visitor::fs_visitor(struct brw_context *brw,
 
 fs_visitor::~fs_visitor()
 {
-   hash_table_dtor(this->variable_ht);
 }