xserver libX11 libxcb mesa git update 15 Mar 2011

10 files changed, 5369 insertions, 5310 deletions

diff --git a/mesalib/src/glsl/SConscript b/mesalib/src/glsl/SConscript
index d7c3459f2..5d97756e1 100644
--- a/mesalib/src/glsl/SConscript
+++ b/mesalib/src/glsl/SConscript
@@ -105,11 +105,16 @@ if env['msvc']:
 if env['crosscompile'] and env['platform'] != 'embedded':

     Import('builtin_glsl_function')

 else:

+    # Copy these files to avoid generation object files into src/mesa/program

+    env.Prepend(CPPPATH = ['#src/mesa/program'])

+    env.Command('hash_table.c', '#src/mesa/program/hash_table.c', Copy('$TARGET', '$SOURCE'))

+    env.Command('symbol_table.c', '#src/mesa/program/symbol_table.c', Copy('$TARGET', '$SOURCE'))

+

     main_obj = env.StaticObject('main.cpp')

 

     mesa_objs = env.StaticObject([

-        '#src/mesa/program/hash_table.c',

-        '#src/mesa/program/symbol_table.c',

+        'hash_table.c',

+        'symbol_table.c',

     ])

 

     builtin_compiler = env.Program(

diff --git a/mesalib/src/glsl/ir.cpp b/mesalib/src/glsl/ir.cpp
index fc356ba52..ceb989110 100644
--- a/mesalib/src/glsl/ir.cpp
+++ b/mesalib/src/glsl/ir.cpp
@@ -1,1576 +1,1572 @@
-/*
- * Copyright © 2010 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- */
-#include <string.h>
-#include "main/core.h" /* for MAX2 */
-#include "ir.h"
-#include "ir_visitor.h"
-#include "glsl_types.h"
-
-ir_rvalue::ir_rvalue()
-{
-   this->type = glsl_type::error_type;
-}
-
-bool ir_rvalue::is_zero() const
-{
-   return false;
-}
-
-bool ir_rvalue::is_one() const
-{
-   return false;
-}
-
-bool ir_rvalue::is_negative_one() const
-{
-   return false;
-}
-
-/**
- * Modify the swizzle make to move one component to another
- *
- * \param m    IR swizzle to be modified
- * \param from Component in the RHS that is to be swizzled
- * \param to   Desired swizzle location of \c from
- */
-static void
-update_rhs_swizzle(ir_swizzle_mask &m, unsigned from, unsigned to)
-{
-   switch (to) {
-   case 0: m.x = from; break;
-   case 1: m.y = from; break;
-   case 2: m.z = from; break;
-   case 3: m.w = from; break;
-   default: assert(!"Should not get here.");
-   }
-
-   m.num_components = MAX2(m.num_components, (to + 1));
-}
-
-void
-ir_assignment::set_lhs(ir_rvalue *lhs)
-{
-   void *mem_ctx = this;
-   bool swizzled = false;
-
-   while (lhs != NULL) {
-      ir_swizzle *swiz = lhs->as_swizzle();
-
-      if (swiz == NULL)
-	 break;
-
-      unsigned write_mask = 0;
-      ir_swizzle_mask rhs_swiz = { 0, 0, 0, 0, 0, 0 };
-
-      for (unsigned i = 0; i < swiz->mask.num_components; i++) {
-	 unsigned c = 0;
-
-	 switch (i) {
-	 case 0: c = swiz->mask.x; break;
-	 case 1: c = swiz->mask.y; break;
-	 case 2: c = swiz->mask.z; break;
-	 case 3: c = swiz->mask.w; break;
-	 default: assert(!"Should not get here.");
-	 }
-
-	 write_mask |= (((this->write_mask >> i) & 1) << c);
-	 update_rhs_swizzle(rhs_swiz, i, c);
-      }
-
-      this->write_mask = write_mask;
-      lhs = swiz->val;
-
-      this->rhs = new(mem_ctx) ir_swizzle(this->rhs, rhs_swiz);
-      swizzled = true;
-   }
-
-   if (swizzled) {
-      /* Now, RHS channels line up with the LHS writemask.  Collapse it
-       * to just the channels that will be written.
-       */
-      ir_swizzle_mask rhs_swiz = { 0, 0, 0, 0, 0, 0 };
-      int rhs_chan = 0;
-      for (int i = 0; i < 4; i++) {
-	 if (write_mask & (1 << i))
-	    update_rhs_swizzle(rhs_swiz, i, rhs_chan++);
-      }
-      this->rhs = new(mem_ctx) ir_swizzle(this->rhs, rhs_swiz);
-   }
-
-   assert((lhs == NULL) || lhs->as_dereference());
-
-   this->lhs = (ir_dereference *) lhs;
-}
-
-ir_variable *
-ir_assignment::whole_variable_written()
-{
-   ir_variable *v = this->lhs->whole_variable_referenced();
-
-   if (v == NULL)
-      return NULL;
-
-   if (v->type->is_scalar())
-      return v;
-
-   if (v->type->is_vector()) {
-      const unsigned mask = (1U << v->type->vector_elements) - 1;
-
-      if (mask != this->write_mask)
-	 return NULL;
-   }
-
-   /* Either all the vector components are assigned or the variable is some
-    * composite type (and the whole thing is assigned.
-    */
-   return v;
-}
-
-ir_assignment::ir_assignment(ir_dereference *lhs, ir_rvalue *rhs,
-			     ir_rvalue *condition, unsigned write_mask)
-{
-   this->ir_type = ir_type_assignment;
-   this->condition = condition;
-   this->rhs = rhs;
-   this->lhs = lhs;
-   this->write_mask = write_mask;
-
-   if (lhs->type->is_scalar() || lhs->type->is_vector()) {
-      int lhs_components = 0;
-      for (int i = 0; i < 4; i++) {
-	 if (write_mask & (1 << i))
-	    lhs_components++;
-      }
-
-      assert(lhs_components == this->rhs->type->vector_elements);
-   }
-}
-
-ir_assignment::ir_assignment(ir_rvalue *lhs, ir_rvalue *rhs,
-			     ir_rvalue *condition)
-{
-   this->ir_type = ir_type_assignment;
-   this->condition = condition;
-   this->rhs = rhs;
-
-   /* If the RHS is a vector type, assume that all components of the vector
-    * type are being written to the LHS.  The write mask comes from the RHS
-    * because we can have a case where the LHS is a vec4 and the RHS is a
-    * vec3.  In that case, the assignment is:
-    *
-    *     (assign (...) (xyz) (var_ref lhs) (var_ref rhs))
-    */
-   if (rhs->type->is_vector())
-      this->write_mask = (1U << rhs->type->vector_elements) - 1;
-   else if (rhs->type->is_scalar())
-      this->write_mask = 1;
-   else
-      this->write_mask = 0;
-
-   this->set_lhs(lhs);
-}
-
-
-ir_expression::ir_expression(int op, const struct glsl_type *type,
-			     ir_rvalue *op0)
-{
-   assert(get_num_operands(ir_expression_operation(op)) == 1);
-   this->ir_type = ir_type_expression;
-   this->type = type;
-   this->operation = ir_expression_operation(op);
-   this->operands[0] = op0;
-   this->operands[1] = NULL;
-   this->operands[2] = NULL;
-   this->operands[3] = NULL;
-}
-
-ir_expression::ir_expression(int op, const struct glsl_type *type,
-			     ir_rvalue *op0, ir_rvalue *op1)
-{
-   assert(((op1 == NULL) && (get_num_operands(ir_expression_operation(op)) == 1))
-	  || (get_num_operands(ir_expression_operation(op)) == 2));
-   this->ir_type = ir_type_expression;
-   this->type = type;
-   this->operation = ir_expression_operation(op);
-   this->operands[0] = op0;
-   this->operands[1] = op1;
-   this->operands[2] = NULL;
-   this->operands[3] = NULL;
-}
-
-ir_expression::ir_expression(int op, const struct glsl_type *type,
-			     ir_rvalue *op0, ir_rvalue *op1,
-			     ir_rvalue *op2, ir_rvalue *op3)
-{
-   this->ir_type = ir_type_expression;
-   this->type = type;
-   this->operation = ir_expression_operation(op);
-   this->operands[0] = op0;
-   this->operands[1] = op1;
-   this->operands[2] = op2;
-   this->operands[3] = op3;
-}
-
-ir_expression::ir_expression(int op, ir_rvalue *op0)
-{
-   this->ir_type = ir_type_expression;
-
-   this->operation = ir_expression_operation(op);
-   this->operands[0] = op0;
-   this->operands[1] = NULL;
-   this->operands[2] = NULL;
-   this->operands[3] = NULL;
-
-   assert(op <= ir_last_unop);
-
-   switch (this->operation) {
-   case ir_unop_bit_not:
-   case ir_unop_logic_not:
-   case ir_unop_neg:
-   case ir_unop_abs:
-   case ir_unop_sign:
-   case ir_unop_rcp:
-   case ir_unop_rsq:
-   case ir_unop_sqrt:
-   case ir_unop_exp:
-   case ir_unop_log:
-   case ir_unop_exp2:
-   case ir_unop_log2:
-   case ir_unop_trunc:
-   case ir_unop_ceil:
-   case ir_unop_floor:
-   case ir_unop_fract:
-   case ir_unop_round_even:
-   case ir_unop_sin:
-   case ir_unop_cos:
-   case ir_unop_sin_reduced:
-   case ir_unop_cos_reduced:
-   case ir_unop_dFdx:
-   case ir_unop_dFdy:
-      this->type = op0->type;
-      break;
-
-   case ir_unop_f2i:
-   case ir_unop_b2i:
-      this->type = glsl_type::get_instance(GLSL_TYPE_INT,
-					   op0->type->vector_elements, 1);
-      break;
-
-   case ir_unop_b2f:
-   case ir_unop_i2f:
-   case ir_unop_u2f:
-      this->type = glsl_type::get_instance(GLSL_TYPE_FLOAT,
-					   op0->type->vector_elements, 1);
-      break;
-
-   case ir_unop_f2b:
-   case ir_unop_i2b:
-      this->type = glsl_type::get_instance(GLSL_TYPE_BOOL,
-					   op0->type->vector_elements, 1);
-      break;
-
-   case ir_unop_noise:
-      this->type = glsl_type::float_type;
-      break;
-
-   case ir_unop_any:
-      this->type = glsl_type::bool_type;
-      break;
-
-   default:
-      assert(!"not reached: missing automatic type setup for ir_expression");
-      this->type = op0->type;
-      break;
-   }
-}
-
-ir_expression::ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1)
-{
-   this->ir_type = ir_type_expression;
-
-   this->operation = ir_expression_operation(op);
-   this->operands[0] = op0;
-   this->operands[1] = op1;
-   this->operands[2] = NULL;
-   this->operands[3] = NULL;
-
-   assert(op > ir_last_unop);
-
-   switch (this->operation) {
-   case ir_binop_all_equal:
-   case ir_binop_any_nequal:
-      this->type = glsl_type::bool_type;
-      break;
-
-   case ir_binop_add:
-   case ir_binop_sub:
-   case ir_binop_min:
-   case ir_binop_max:
-   case ir_binop_pow:
-   case ir_binop_mul:
-   case ir_binop_div:
-   case ir_binop_mod:
-      if (op0->type->is_scalar()) {
-	 this->type = op1->type;
-      } else if (op1->type->is_scalar()) {
-	 this->type = op0->type;
-      } else {
-	 /* FINISHME: matrix types */
-	 assert(!op0->type->is_matrix() && !op1->type->is_matrix());
-	 assert(op0->type == op1->type);
-	 this->type = op0->type;
-      }
-      break;
-
-   case ir_binop_logic_and:
-   case ir_binop_logic_xor:
-   case ir_binop_logic_or:
-   case ir_binop_bit_and:
-   case ir_binop_bit_xor:
-   case ir_binop_bit_or:
-      if (op0->type->is_scalar()) {
-	 this->type = op1->type;
-      } else if (op1->type->is_scalar()) {
-	 this->type = op0->type;
-      }
-      break;
-
-   case ir_binop_equal:
-   case ir_binop_nequal:
-   case ir_binop_lequal:
-   case ir_binop_gequal:
-   case ir_binop_less:
-   case ir_binop_greater:
-      assert(op0->type == op1->type);
-      this->type = glsl_type::get_instance(GLSL_TYPE_BOOL,
-					   op0->type->vector_elements, 1);
-      break;
-
-   case ir_binop_dot:
-      this->type = glsl_type::float_type;
-      break;
-
-   case ir_binop_lshift:
-   case ir_binop_rshift:
-      this->type = op0->type;
-      break;
-
-   default:
-      assert(!"not reached: missing automatic type setup for ir_expression");
-      this->type = glsl_type::float_type;
-   }
-}
-
-unsigned int
-ir_expression::get_num_operands(ir_expression_operation op)
-{
-   assert(op <= ir_last_opcode);
-
-   if (op <= ir_last_unop)
-      return 1;
-
-   if (op <= ir_last_binop)
-      return 2;
-
-   if (op == ir_quadop_vector)
-      return 4;
-
-   assert(false);
-   return 0;
-}
-
-static const char *const operator_strs[] = {
-   "~",
-   "!",
-   "neg",
-   "abs",
-   "sign",
-   "rcp",
-   "rsq",
-   "sqrt",
-   "exp",
-   "log",
-   "exp2",
-   "log2",
-   "f2i",
-   "i2f",
-   "f2b",
-   "b2f",
-   "i2b",
-   "b2i",
-   "u2f",
-   "any",
-   "trunc",
-   "ceil",
-   "floor",
-   "fract",
-   "round_even",
-   "sin",
-   "cos",
-   "sin_reduced",
-   "cos_reduced",
-   "dFdx",
-   "dFdy",
-   "noise",
-   "+",
-   "-",
-   "*",
-   "/",
-   "%",
-   "<",
-   ">",
-   "<=",
-   ">=",
-   "==",
-   "!=",
-   "all_equal",
-   "any_nequal",
-   "<<",
-   ">>",
-   "&",
-   "^",
-   "|",
-   "&&",
-   "^^",
-   "||",
-   "dot",
-   "min",
-   "max",
-   "pow",
-   "vector",
-};
-
-const char *ir_expression::operator_string(ir_expression_operation op)
-{
-   assert((unsigned int) op < Elements(operator_strs));
-   assert(Elements(operator_strs) == (ir_quadop_vector + 1));
-   return operator_strs[op];
-}
-
-const char *ir_expression::operator_string()
-{
-   return operator_string(this->operation);
-}
-
-const char*
-depth_layout_string(ir_depth_layout layout)
-{
-   switch(layout) {
-   case ir_depth_layout_none:      return "";
-   case ir_depth_layout_any:       return "depth_any";
-   case ir_depth_layout_greater:   return "depth_greater";
-   case ir_depth_layout_less:      return "depth_less";
-   case ir_depth_layout_unchanged: return "depth_unchanged";
-
-   default:
-      assert(0);
-      return "";
-   }
-}
-
-ir_expression_operation
-ir_expression::get_operator(const char *str)
-{
-   const int operator_count = sizeof(operator_strs) / sizeof(operator_strs[0]);
-   for (int op = 0; op < operator_count; op++) {
-      if (strcmp(str, operator_strs[op]) == 0)
-	 return (ir_expression_operation) op;
-   }
-   return (ir_expression_operation) -1;
-}
-
-ir_constant::ir_constant()
-{
-   this->ir_type = ir_type_constant;
-}
-
-ir_constant::ir_constant(const struct glsl_type *type,
-			 const ir_constant_data *data)
-{
-   assert((type->base_type >= GLSL_TYPE_UINT)
-	  && (type->base_type <= GLSL_TYPE_BOOL));
-
-   this->ir_type = ir_type_constant;
-   this->type = type;
-   memcpy(& this->value, data, sizeof(this->value));
-}
-
-ir_constant::ir_constant(float f)
-{
-   this->ir_type = ir_type_constant;
-   this->type = glsl_type::float_type;
-   this->value.f[0] = f;
-   for (int i = 1; i < 16; i++)  {
-      this->value.f[i] = 0;
-   }
-}
-
-ir_constant::ir_constant(unsigned int u)
-{
-   this->ir_type = ir_type_constant;
-   this->type = glsl_type::uint_type;
-   this->value.u[0] = u;
-   for (int i = 1; i < 16; i++) {
-      this->value.u[i] = 0;
-   }
-}
-
-ir_constant::ir_constant(int i)
-{
-   this->ir_type = ir_type_constant;
-   this->type = glsl_type::int_type;
-   this->value.i[0] = i;
-   for (int i = 1; i < 16; i++) {
-      this->value.i[i] = 0;
-   }
-}
-
-ir_constant::ir_constant(bool b)
-{
-   this->ir_type = ir_type_constant;
-   this->type = glsl_type::bool_type;
-   this->value.b[0] = b;
-   for (int i = 1; i < 16; i++) {
-      this->value.b[i] = false;
-   }
-}
-
-ir_constant::ir_constant(const ir_constant *c, unsigned i)
-{
-   this->ir_type = ir_type_constant;
-   this->type = c->type->get_base_type();
-
-   switch (this->type->base_type) {
-   case GLSL_TYPE_UINT:  this->value.u[0] = c->value.u[i]; break;
-   case GLSL_TYPE_INT:   this->value.i[0] = c->value.i[i]; break;
-   case GLSL_TYPE_FLOAT: this->value.f[0] = c->value.f[i]; break;
-   case GLSL_TYPE_BOOL:  this->value.b[0] = c->value.b[i]; break;
-   default:              assert(!"Should not get here."); break;
-   }
-}
-
-ir_constant::ir_constant(const struct glsl_type *type, exec_list *value_list)
-{
-   this->ir_type = ir_type_constant;
-   this->type = type;
-
-   assert(type->is_scalar() || type->is_vector() || type->is_matrix()
-	  || type->is_record() || type->is_array());
-
-   if (type->is_array()) {
-      this->array_elements = ralloc_array(this, ir_constant *, type->length);
-      unsigned i = 0;
-      foreach_list(node, value_list) {
-	 ir_constant *value = (ir_constant *) node;
-	 assert(value->as_constant() != NULL);
-
-	 this->array_elements[i++] = value;
-      }
-      return;
-   }
-
-   /* If the constant is a record, the types of each of the entries in
-    * value_list must be a 1-for-1 match with the structure components.  Each
-    * entry must also be a constant.  Just move the nodes from the value_list
-    * to the list in the ir_constant.
-    */
-   /* FINISHME: Should there be some type checking and / or assertions here? */
-   /* FINISHME: Should the new constant take ownership of the nodes from
-    * FINISHME: value_list, or should it make copies?
-    */
-   if (type->is_record()) {
-      value_list->move_nodes_to(& this->components);
-      return;
-   }
-
-   for (unsigned i = 0; i < 16; i++) {
-      this->value.u[i] = 0;
-   }
-
-   ir_constant *value = (ir_constant *) (value_list->head);
-
-   /* Constructors with exactly one scalar argument are special for vectors
-    * and matrices.  For vectors, the scalar value is replicated to fill all
-    * the components.  For matrices, the scalar fills the components of the
-    * diagonal while the rest is filled with 0.
-    */
-   if (value->type->is_scalar() && value->next->is_tail_sentinel()) {
-      if (type->is_matrix()) {
-	 /* Matrix - fill diagonal (rest is already set to 0) */
-	 assert(type->base_type == GLSL_TYPE_FLOAT);
-	 for (unsigned i = 0; i < type->matrix_columns; i++)
-	    this->value.f[i * type->vector_elements + i] = value->value.f[0];
-      } else {
-	 /* Vector or scalar - fill all components */
-	 switch (type->base_type) {
-	 case GLSL_TYPE_UINT:
-	 case GLSL_TYPE_INT:
-	    for (unsigned i = 0; i < type->components(); i++)
-	       this->value.u[i] = value->value.u[0];
-	    break;
-	 case GLSL_TYPE_FLOAT:
-	    for (unsigned i = 0; i < type->components(); i++)
-	       this->value.f[i] = value->value.f[0];
-	    break;
-	 case GLSL_TYPE_BOOL:
-	    for (unsigned i = 0; i < type->components(); i++)
-	       this->value.b[i] = value->value.b[0];
-	    break;
-	 default:
-	    assert(!"Should not get here.");
-	    break;
-	 }
-      }
-      return;
-   }
-
-   if (type->is_matrix() && value->type->is_matrix()) {
-      assert(value->next->is_tail_sentinel());
-
-      /* From section 5.4.2 of the GLSL 1.20 spec:
-       * "If a matrix is constructed from a matrix, then each component
-       *  (column i, row j) in the result that has a corresponding component
-       *  (column i, row j) in the argument will be initialized from there."
-       */
-      unsigned cols = MIN2(type->matrix_columns, value->type->matrix_columns);
-      unsigned rows = MIN2(type->vector_elements, value->type->vector_elements);
-      for (unsigned i = 0; i < cols; i++) {
-	 for (unsigned j = 0; j < rows; j++) {
-	    const unsigned src = i * value->type->vector_elements + j;
-	    const unsigned dst = i * type->vector_elements + j;
-	    this->value.f[dst] = value->value.f[src];
-	 }
-      }
-
-      /* "All other components will be initialized to the identity matrix." */
-      for (unsigned i = cols; i < type->matrix_columns; i++)
-	 this->value.f[i * type->vector_elements + i] = 1.0;
-
-      return;
-   }
-
-   /* Use each component from each entry in the value_list to initialize one
-    * component of the constant being constructed.
-    */
-   for (unsigned i = 0; i < type->components(); /* empty */) {
-      assert(value->as_constant() != NULL);
-      assert(!value->is_tail_sentinel());
-
-      for (unsigned j = 0; j < value->type->components(); j++) {
-	 switch (type->base_type) {
-	 case GLSL_TYPE_UINT:
-	    this->value.u[i] = value->get_uint_component(j);
-	    break;
-	 case GLSL_TYPE_INT:
-	    this->value.i[i] = value->get_int_component(j);
-	    break;
-	 case GLSL_TYPE_FLOAT:
-	    this->value.f[i] = value->get_float_component(j);
-	    break;
-	 case GLSL_TYPE_BOOL:
-	    this->value.b[i] = value->get_bool_component(j);
-	    break;
-	 default:
-	    /* FINISHME: What to do?  Exceptions are not the answer.
-	     */
-	    break;
-	 }
-
-	 i++;
-	 if (i >= type->components())
-	    break;
-      }
-
-      value = (ir_constant *) value->next;
-   }
-}
-
-ir_constant *
-ir_constant::zero(void *mem_ctx, const glsl_type *type)
-{
-   assert(type->is_numeric() || type->is_boolean());
-
-   ir_constant *c = new(mem_ctx) ir_constant;
-   c->type = type;
-   memset(&c->value, 0, sizeof(c->value));
-
-   return c;
-}
-
-bool
-ir_constant::get_bool_component(unsigned i) const
-{
-   switch (this->type->base_type) {
-   case GLSL_TYPE_UINT:  return this->value.u[i] != 0;
-   case GLSL_TYPE_INT:   return this->value.i[i] != 0;
-   case GLSL_TYPE_FLOAT: return ((int)this->value.f[i]) != 0;
-   case GLSL_TYPE_BOOL:  return this->value.b[i];
-   default:              assert(!"Should not get here."); break;
-   }
-
-   /* Must return something to make the compiler happy.  This is clearly an
-    * error case.
-    */
-   return false;
-}
-
-float
-ir_constant::get_float_component(unsigned i) const
-{
-   switch (this->type->base_type) {
-   case GLSL_TYPE_UINT:  return (float) this->value.u[i];
-   case GLSL_TYPE_INT:   return (float) this->value.i[i];
-   case GLSL_TYPE_FLOAT: return this->value.f[i];
-   case GLSL_TYPE_BOOL:  return this->value.b[i] ? 1.0 : 0.0;
-   default:              assert(!"Should not get here."); break;
-   }
-
-   /* Must return something to make the compiler happy.  This is clearly an
-    * error case.
-    */
-   return 0.0;
-}
-
-int
-ir_constant::get_int_component(unsigned i) const
-{
-   switch (this->type->base_type) {
-   case GLSL_TYPE_UINT:  return this->value.u[i];
-   case GLSL_TYPE_INT:   return this->value.i[i];
-   case GLSL_TYPE_FLOAT: return (int) this->value.f[i];
-   case GLSL_TYPE_BOOL:  return this->value.b[i] ? 1 : 0;
-   default:              assert(!"Should not get here."); break;
-   }
-
-   /* Must return something to make the compiler happy.  This is clearly an
-    * error case.
-    */
-   return 0;
-}
-
-unsigned
-ir_constant::get_uint_component(unsigned i) const
-{
-   switch (this->type->base_type) {
-   case GLSL_TYPE_UINT:  return this->value.u[i];
-   case GLSL_TYPE_INT:   return this->value.i[i];
-   case GLSL_TYPE_FLOAT: return (unsigned) this->value.f[i];
-   case GLSL_TYPE_BOOL:  return this->value.b[i] ? 1 : 0;
-   default:              assert(!"Should not get here."); break;
-   }
-
-   /* Must return something to make the compiler happy.  This is clearly an
-    * error case.
-    */
-   return 0;
-}
-
-ir_constant *
-ir_constant::get_array_element(unsigned i) const
-{
-   assert(this->type->is_array());
-
-   /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
-    *
-    *     "Behavior is undefined if a shader subscripts an array with an index
-    *     less than 0 or greater than or equal to the size the array was
-    *     declared with."
-    *
-    * Most out-of-bounds accesses are removed before things could get this far.
-    * There are cases where non-constant array index values can get constant
-    * folded.
-    */
-   if (int(i) < 0)
-      i = 0;
-   else if (i >= this->type->length)
-      i = this->type->length - 1;
-
-   return array_elements[i];
-}
-
-ir_constant *
-ir_constant::get_record_field(const char *name)
-{
-   int idx = this->type->field_index(name);
-
-   if (idx < 0)
-      return NULL;
-
-   if (this->components.is_empty())
-      return NULL;
-
-   exec_node *node = this->components.head;
-   for (int i = 0; i < idx; i++) {
-      node = node->next;
-
-      /* If the end of the list is encountered before the element matching the
-       * requested field is found, return NULL.
-       */
-      if (node->is_tail_sentinel())
-	 return NULL;
-   }
-
-   return (ir_constant *) node;
-}
-
-
-bool
-ir_constant::has_value(const ir_constant *c) const
-{
-   if (this->type != c->type)
-      return false;
-
-   if (this->type->is_array()) {
-      for (unsigned i = 0; i < this->type->length; i++) {
-	 if (!this->array_elements[i]->has_value(c->array_elements[i]))
-	    return false;
-      }
-      return true;
-   }
-
-   if (this->type->base_type == GLSL_TYPE_STRUCT) {
-      const exec_node *a_node = this->components.head;
-      const exec_node *b_node = c->components.head;
-
-      while (!a_node->is_tail_sentinel()) {
-	 assert(!b_node->is_tail_sentinel());
-
-	 const ir_constant *const a_field = (ir_constant *) a_node;
-	 const ir_constant *const b_field = (ir_constant *) b_node;
-
-	 if (!a_field->has_value(b_field))
-	    return false;
-
-	 a_node = a_node->next;
-	 b_node = b_node->next;
-      }
-
-      return true;
-   }
-
-   for (unsigned i = 0; i < this->type->components(); i++) {
-      switch (this->type->base_type) {
-      case GLSL_TYPE_UINT:
-	 if (this->value.u[i] != c->value.u[i])
-	    return false;
-	 break;
-      case GLSL_TYPE_INT:
-	 if (this->value.i[i] != c->value.i[i])
-	    return false;
-	 break;
-      case GLSL_TYPE_FLOAT:
-	 if (this->value.f[i] != c->value.f[i])
-	    return false;
-	 break;
-      case GLSL_TYPE_BOOL:
-	 if (this->value.b[i] != c->value.b[i])
-	    return false;
-	 break;
-      default:
-	 assert(!"Should not get here.");
-	 return false;
-      }
-   }
-
-   return true;
-}
-
-bool
-ir_constant::is_zero() const
-{
-   if (!this->type->is_scalar() && !this->type->is_vector())
-      return false;
-
-   for (unsigned c = 0; c < this->type->vector_elements; c++) {
-      switch (this->type->base_type) {
-      case GLSL_TYPE_FLOAT:
-	 if (this->value.f[c] != 0.0)
-	    return false;
-	 break;
-      case GLSL_TYPE_INT:
-	 if (this->value.i[c] != 0)
-	    return false;
-	 break;
-      case GLSL_TYPE_UINT:
-	 if (this->value.u[c] != 0)
-	    return false;
-	 break;
-      case GLSL_TYPE_BOOL:
-	 if (this->value.b[c] != false)
-	    return false;
-	 break;
-      default:
-	 /* The only other base types are structures, arrays, and samplers.
-	  * Samplers cannot be constants, and the others should have been
-	  * filtered out above.
-	  */
-	 assert(!"Should not get here.");
-	 return false;
-      }
-   }
-
-   return true;
-}
-
-bool
-ir_constant::is_one() const
-{
-   if (!this->type->is_scalar() && !this->type->is_vector())
-      return false;
-
-   for (unsigned c = 0; c < this->type->vector_elements; c++) {
-      switch (this->type->base_type) {
-      case GLSL_TYPE_FLOAT:
-	 if (this->value.f[c] != 1.0)
-	    return false;
-	 break;
-      case GLSL_TYPE_INT:
-	 if (this->value.i[c] != 1)
-	    return false;
-	 break;
-      case GLSL_TYPE_UINT:
-	 if (this->value.u[c] != 1)
-	    return false;
-	 break;
-      case GLSL_TYPE_BOOL:
-	 if (this->value.b[c] != true)
-	    return false;
-	 break;
-      default:
-	 /* The only other base types are structures, arrays, and samplers.
-	  * Samplers cannot be constants, and the others should have been
-	  * filtered out above.
-	  */
-	 assert(!"Should not get here.");
-	 return false;
-      }
-   }
-
-   return true;
-}
-
-bool
-ir_constant::is_negative_one() const
-{
-   if (!this->type->is_scalar() && !this->type->is_vector())
-      return false;
-
-   if (this->type->is_boolean())
-      return false;
-
-   for (unsigned c = 0; c < this->type->vector_elements; c++) {
-      switch (this->type->base_type) {
-      case GLSL_TYPE_FLOAT:
-	 if (this->value.f[c] != -1.0)
-	    return false;
-	 break;
-      case GLSL_TYPE_INT:
-	 if (this->value.i[c] != -1)
-	    return false;
-	 break;
-      case GLSL_TYPE_UINT:
-	 if (int(this->value.u[c]) != -1)
-	    return false;
-	 break;
-      default:
-	 /* The only other base types are structures, arrays, samplers, and
-	  * booleans.  Samplers cannot be constants, and the others should
-	  * have been filtered out above.
-	  */
-	 assert(!"Should not get here.");
-	 return false;
-      }
-   }
-
-   return true;
-}
-
-ir_loop::ir_loop()
-{
-   this->ir_type = ir_type_loop;
-   this->cmp = ir_unop_neg;
-   this->from = NULL;
-   this->to = NULL;
-   this->increment = NULL;
-   this->counter = NULL;
-}
-
-
-ir_dereference_variable::ir_dereference_variable(ir_variable *var)
-{
-   this->ir_type = ir_type_dereference_variable;
-   this->var = var;
-   this->type = (var != NULL) ? var->type : glsl_type::error_type;
-}
-
-
-ir_dereference_array::ir_dereference_array(ir_rvalue *value,
-					   ir_rvalue *array_index)
-{
-   this->ir_type = ir_type_dereference_array;
-   this->array_index = array_index;
-   this->set_array(value);
-}
-
-
-ir_dereference_array::ir_dereference_array(ir_variable *var,
-					   ir_rvalue *array_index)
-{
-   void *ctx = ralloc_parent(var);
-
-   this->ir_type = ir_type_dereference_array;
-   this->array_index = array_index;
-   this->set_array(new(ctx) ir_dereference_variable(var));
-}
-
-
-void
-ir_dereference_array::set_array(ir_rvalue *value)
-{
-   this->array = value;
-   this->type = glsl_type::error_type;
-
-   if (this->array != NULL) {
-      const glsl_type *const vt = this->array->type;
-
-      if (vt->is_array()) {
-	 type = vt->element_type();
-      } else if (vt->is_matrix()) {
-	 type = vt->column_type();
-      } else if (vt->is_vector()) {
-	 type = vt->get_base_type();
-      }
-   }
-}
-
-
-ir_dereference_record::ir_dereference_record(ir_rvalue *value,
-					     const char *field)
-{
-   this->ir_type = ir_type_dereference_record;
-   this->record = value;
-   this->field = ralloc_strdup(this, field);
-   this->type = (this->record != NULL)
-      ? this->record->type->field_type(field) : glsl_type::error_type;
-}
-
-
-ir_dereference_record::ir_dereference_record(ir_variable *var,
-					     const char *field)
-{
-   void *ctx = ralloc_parent(var);
-
-   this->ir_type = ir_type_dereference_record;
-   this->record = new(ctx) ir_dereference_variable(var);
-   this->field = ralloc_strdup(this, field);
-   this->type = (this->record != NULL)
-      ? this->record->type->field_type(field) : glsl_type::error_type;
-}
-
-bool type_contains_sampler(const glsl_type *type)
-{
-   if (type->is_array()) {
-      return type_contains_sampler(type->fields.array);
-   } else if (type->is_record()) {
-      for (unsigned int i = 0; i < type->length; i++) {
-	 if (type_contains_sampler(type->fields.structure[i].type))
-	    return true;
-      }
-      return false;
-   } else {
-      return type->is_sampler();
-   }
-}
-
-bool
-ir_dereference::is_lvalue()
-{
-   ir_variable *var = this->variable_referenced();
-
-   /* Every l-value derference chain eventually ends in a variable.
-    */
-   if ((var == NULL) || var->read_only)
-      return false;
-
-   if (this->type->is_array() && !var->array_lvalue)
-      return false;
-
-   /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
-    *
-    *    "Samplers cannot be treated as l-values; hence cannot be used
-    *     as out or inout function parameters, nor can they be
-    *     assigned into."
-    */
-   if (type_contains_sampler(this->type))
-      return false;
-
-   return true;
-}
-
-
-const char *tex_opcode_strs[] = { "tex", "txb", "txl", "txd", "txf" };
-
-const char *ir_texture::opcode_string()
-{
-   assert((unsigned int) op <=
-	  sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]));
-   return tex_opcode_strs[op];
-}
-
-ir_texture_opcode
-ir_texture::get_opcode(const char *str)
-{
-   const int count = sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]);
-   for (int op = 0; op < count; op++) {
-      if (strcmp(str, tex_opcode_strs[op]) == 0)
-	 return (ir_texture_opcode) op;
-   }
-   return (ir_texture_opcode) -1;
-}
-
-
-void
-ir_texture::set_sampler(ir_dereference *sampler)
-{
-   assert(sampler != NULL);
-   this->sampler = sampler;
-
-   switch (sampler->type->sampler_type) {
-   case GLSL_TYPE_FLOAT:
-      this->type = glsl_type::vec4_type;
-      break;
-   case GLSL_TYPE_INT:
-      this->type = glsl_type::ivec4_type;
-      break;
-   case GLSL_TYPE_UINT:
-      this->type = glsl_type::uvec4_type;
-      break;
-   }
-}
-
-
-void
-ir_swizzle::init_mask(const unsigned *comp, unsigned count)
-{
-   assert((count >= 1) && (count <= 4));
-
-   memset(&this->mask, 0, sizeof(this->mask));
-   this->mask.num_components = count;
-
-   unsigned dup_mask = 0;
-   switch (count) {
-   case 4:
-      assert(comp[3] <= 3);
-      dup_mask |= (1U << comp[3])
-	 & ((1U << comp[0]) | (1U << comp[1]) | (1U << comp[2]));
-      this->mask.w = comp[3];
-
-   case 3:
-      assert(comp[2] <= 3);
-      dup_mask |= (1U << comp[2])
-	 & ((1U << comp[0]) | (1U << comp[1]));
-      this->mask.z = comp[2];
-
-   case 2:
-      assert(comp[1] <= 3);
-      dup_mask |= (1U << comp[1])
-	 & ((1U << comp[0]));
-      this->mask.y = comp[1];
-
-   case 1:
-      assert(comp[0] <= 3);
-      this->mask.x = comp[0];
-   }
-
-   this->mask.has_duplicates = dup_mask != 0;
-
-   /* Based on the number of elements in the swizzle and the base type
-    * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
-    * generate the type of the resulting value.
-    */
-   type = glsl_type::get_instance(val->type->base_type, mask.num_components, 1);
-}
-
-ir_swizzle::ir_swizzle(ir_rvalue *val, unsigned x, unsigned y, unsigned z,
-		       unsigned w, unsigned count)
-   : val(val)
-{
-   const unsigned components[4] = { x, y, z, w };
-   this->ir_type = ir_type_swizzle;
-   this->init_mask(components, count);
-}
-
-ir_swizzle::ir_swizzle(ir_rvalue *val, const unsigned *comp,
-		       unsigned count)
-   : val(val)
-{
-   this->ir_type = ir_type_swizzle;
-   this->init_mask(comp, count);
-}
-
-ir_swizzle::ir_swizzle(ir_rvalue *val, ir_swizzle_mask mask)
-{
-   this->ir_type = ir_type_swizzle;
-   this->val = val;
-   this->mask = mask;
-   this->type = glsl_type::get_instance(val->type->base_type,
-					mask.num_components, 1);
-}
-
-#define X 1
-#define R 5
-#define S 9
-#define I 13
-
-ir_swizzle *
-ir_swizzle::create(ir_rvalue *val, const char *str, unsigned vector_length)
-{
-   void *ctx = ralloc_parent(val);
-
-   /* For each possible swizzle character, this table encodes the value in
-    * \c idx_map that represents the 0th element of the vector.  For invalid
-    * swizzle characters (e.g., 'k'), a special value is used that will allow
-    * detection of errors.
-    */
-   static const unsigned char base_idx[26] = {
-   /* a  b  c  d  e  f  g  h  i  j  k  l  m */
-      R, R, I, I, I, I, R, I, I, I, I, I, I,
-   /* n  o  p  q  r  s  t  u  v  w  x  y  z */
-      I, I, S, S, R, S, S, I, I, X, X, X, X
-   };
-
-   /* Each valid swizzle character has an entry in the previous table.  This
-    * table encodes the base index encoded in the previous table plus the actual
-    * index of the swizzle character.  When processing swizzles, the first
-    * character in the string is indexed in the previous table.  Each character
-    * in the string is indexed in this table, and the value found there has the
-    * value form the first table subtracted.  The result must be on the range
-    * [0,3].
-    *
-    * For example, the string "wzyx" will get X from the first table.  Each of
-    * the charcaters will get X+3, X+2, X+1, and X+0 from this table.  After
-    * subtraction, the swizzle values are { 3, 2, 1, 0 }.
-    *
-    * The string "wzrg" will get X from the first table.  Each of the characters
-    * will get X+3, X+2, R+0, and R+1 from this table.  After subtraction, the
-    * swizzle values are { 3, 2, 4, 5 }.  Since 4 and 5 are outside the range
-    * [0,3], the error is detected.
-    */
-   static const unsigned char idx_map[26] = {
-   /* a    b    c    d    e    f    g    h    i    j    k    l    m */
-      R+3, R+2, 0,   0,   0,   0,   R+1, 0,   0,   0,   0,   0,   0,
-   /* n    o    p    q    r    s    t    u    v    w    x    y    z */
-      0,   0,   S+2, S+3, R+0, S+0, S+1, 0,   0,   X+3, X+0, X+1, X+2
-   };
-
-   int swiz_idx[4] = { 0, 0, 0, 0 };
-   unsigned i;
-
-
-   /* Validate the first character in the swizzle string and look up the base
-    * index value as described above.
-    */
-   if ((str[0] < 'a') || (str[0] > 'z'))
-      return NULL;
-
-   const unsigned base = base_idx[str[0] - 'a'];
-
-
-   for (i = 0; (i < 4) && (str[i] != '\0'); i++) {
-      /* Validate the next character, and, as described above, convert it to a
-       * swizzle index.
-       */
-      if ((str[i] < 'a') || (str[i] > 'z'))
-	 return NULL;
-
-      swiz_idx[i] = idx_map[str[i] - 'a'] - base;
-      if ((swiz_idx[i] < 0) || (swiz_idx[i] >= (int) vector_length))
-	 return NULL;
-   }
-
-   if (str[i] != '\0')
-	 return NULL;
-
-   return new(ctx) ir_swizzle(val, swiz_idx[0], swiz_idx[1], swiz_idx[2],
-			      swiz_idx[3], i);
-}
-
-#undef X
-#undef R
-#undef S
-#undef I
-
-ir_variable *
-ir_swizzle::variable_referenced()
-{
-   return this->val->variable_referenced();
-}
-
-
-ir_variable::ir_variable(const struct glsl_type *type, const char *name,
-			 ir_variable_mode mode)
-   : max_array_access(0), read_only(false), centroid(false), invariant(false),
-     mode(mode), interpolation(ir_var_smooth), array_lvalue(false)
-{
-   this->ir_type = ir_type_variable;
-   this->type = type;
-   this->name = ralloc_strdup(this, name);
-   this->explicit_location = false;
-   this->location = -1;
-   this->warn_extension = NULL;
-   this->constant_value = NULL;
-   this->origin_upper_left = false;
-   this->pixel_center_integer = false;
-   this->depth_layout = ir_depth_layout_none;
-   this->used = false;
-
-   if (type && type->base_type == GLSL_TYPE_SAMPLER)
-      this->read_only = true;
-}
-
-
-const char *
-ir_variable::interpolation_string() const
-{
-   switch (this->interpolation) {
-   case ir_var_smooth:        return "smooth";
-   case ir_var_flat:          return "flat";
-   case ir_var_noperspective: return "noperspective";
-   }
-
-   assert(!"Should not get here.");
-   return "";
-}
-
-
-unsigned
-ir_variable::component_slots() const
-{
-   /* FINISHME: Sparsely accessed arrays require fewer slots. */
-   return this->type->component_slots();
-}
-
-
-ir_function_signature::ir_function_signature(const glsl_type *return_type)
-   : return_type(return_type), is_defined(false), _function(NULL)
-{
-   this->ir_type = ir_type_function_signature;
-   this->is_builtin = false;
-}
-
-
-static bool
-modes_match(unsigned a, unsigned b)
-{
-   if (a == b)
-      return true;
-
-   /* Accept "in" vs. "const in" */
-   if ((a == ir_var_const_in && b == ir_var_in) ||
-       (b == ir_var_const_in && a == ir_var_in))
-      return true;
-
-   return false;
-}
-
-
-const char *
-ir_function_signature::qualifiers_match(exec_list *params)
-{
-   exec_list_iterator iter_a = parameters.iterator();
-   exec_list_iterator iter_b = params->iterator();
-
-   /* check that the qualifiers match. */
-   while (iter_a.has_next()) {
-      ir_variable *a = (ir_variable *)iter_a.get();
-      ir_variable *b = (ir_variable *)iter_b.get();
-
-      if (a->read_only != b->read_only ||
-	  !modes_match(a->mode, b->mode) ||
-	  a->interpolation != b->interpolation ||
-	  a->centroid != b->centroid) {
-
-	 /* parameter a's qualifiers don't match */
-	 return a->name;
-      }
-
-      iter_a.next();
-      iter_b.next();
-   }
-   return NULL;
-}
-
-
-void
-ir_function_signature::replace_parameters(exec_list *new_params)
-{
-   /* Destroy all of the previous parameter information.  If the previous
-    * parameter information comes from the function prototype, it may either
-    * specify incorrect parameter names or not have names at all.
-    */
-   foreach_iter(exec_list_iterator, iter, parameters) {
-      assert(((ir_instruction *) iter.get())->as_variable() != NULL);
-
-      iter.remove();
-   }
-
-   new_params->move_nodes_to(&parameters);
-}
-
-
-ir_function::ir_function(const char *name)
-{
-   this->ir_type = ir_type_function;
-   this->name = ralloc_strdup(this, name);
-}
-
-
-bool
-ir_function::has_user_signature()
-{
-   foreach_list(n, &this->signatures) {
-      ir_function_signature *const sig = (ir_function_signature *) n;
-      if (!sig->is_builtin)
-	 return true;
-   }
-   return false;
-}
-
-
-ir_call *
-ir_call::get_error_instruction(void *ctx)
-{
-   ir_call *call = new(ctx) ir_call;
-
-   call->type = glsl_type::error_type;
-   return call;
-}
-
-void
-ir_call::set_callee(ir_function_signature *sig)
-{
-   assert((this->type == NULL) || (this->type == sig->return_type));
-
-   this->callee = sig;
-}
-
-void
-visit_exec_list(exec_list *list, ir_visitor *visitor)
-{
-   foreach_iter(exec_list_iterator, iter, *list) {
-      ((ir_instruction *)iter.get())->accept(visitor);
-   }
-}
-
-
-static void
-steal_memory(ir_instruction *ir, void *new_ctx)
-{
-   ir_variable *var = ir->as_variable();
-   ir_constant *constant = ir->as_constant();
-   if (var != NULL && var->constant_value != NULL)
-      steal_memory(var->constant_value, ir);
-
-   /* The components of aggregate constants are not visited by the normal
-    * visitor, so steal their values by hand.
-    */
-   if (constant != NULL) {
-      if (constant->type->is_record()) {
-	 foreach_iter(exec_list_iterator, iter, constant->components) {
-	    ir_constant *field = (ir_constant *)iter.get();
-	    steal_memory(field, ir);
-	 }
-      } else if (constant->type->is_array()) {
-	 for (unsigned int i = 0; i < constant->type->length; i++) {
-	    steal_memory(constant->array_elements[i], ir);
-	 }
-      }
-   }
-
-   ralloc_steal(new_ctx, ir);
-}
-
-
-void
-reparent_ir(exec_list *list, void *mem_ctx)
-{
-   foreach_list(node, list) {
-      visit_tree((ir_instruction *) node, steal_memory, mem_ctx);
-   }
-}
-
-
-static ir_rvalue *
-try_min_one(ir_rvalue *ir)
-{
-   ir_expression *expr = ir->as_expression();
-
-   if (!expr || expr->operation != ir_binop_min)
-      return NULL;
-
-   if (expr->operands[0]->is_one())
-      return expr->operands[1];
-
-   if (expr->operands[1]->is_one())
-      return expr->operands[0];
-
-   return NULL;
-}
-
-static ir_rvalue *
-try_max_zero(ir_rvalue *ir)
-{
-   ir_expression *expr = ir->as_expression();
-
-   if (!expr || expr->operation != ir_binop_max)
-      return NULL;
-
-   if (expr->operands[0]->is_zero())
-      return expr->operands[1];
-
-   if (expr->operands[1]->is_zero())
-      return expr->operands[0];
-
-   return NULL;
-}
-
-ir_rvalue *
-ir_rvalue::as_rvalue_to_saturate()
-{
-   ir_expression *expr = this->as_expression();
-
-   if (!expr)
-      return NULL;
-
-   ir_rvalue *max_zero = try_max_zero(expr);
-   if (max_zero) {
-      return try_min_one(max_zero);
-   } else {
-      ir_rvalue *min_one = try_min_one(expr);
-      if (min_one) {
-	 return try_max_zero(min_one);
-      }
-   }
-
-   return NULL;
-}
+/*

+ * Copyright © 2010 Intel Corporation

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the "Software"),

+ * to deal in the Software without restriction, including without limitation

+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,

+ * and/or sell copies of the Software, and to permit persons to whom the

+ * Software is furnished to do so, subject to the following conditions:

+ *

+ * The above copyright notice and this permission notice (including the next

+ * paragraph) shall be included in all copies or substantial portions of the

+ * Software.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

+ * DEALINGS IN THE SOFTWARE.

+ */

+#include <string.h>

+#include "main/core.h" /* for MAX2 */

+#include "ir.h"

+#include "ir_visitor.h"

+#include "glsl_types.h"

+

+ir_rvalue::ir_rvalue()

+{

+   this->type = glsl_type::error_type;

+}

+

+bool ir_rvalue::is_zero() const

+{

+   return false;

+}

+

+bool ir_rvalue::is_one() const

+{

+   return false;

+}

+

+bool ir_rvalue::is_negative_one() const

+{

+   return false;

+}

+

+/**

+ * Modify the swizzle make to move one component to another

+ *

+ * \param m    IR swizzle to be modified

+ * \param from Component in the RHS that is to be swizzled

+ * \param to   Desired swizzle location of \c from

+ */

+static void

+update_rhs_swizzle(ir_swizzle_mask &m, unsigned from, unsigned to)

+{

+   switch (to) {

+   case 0: m.x = from; break;

+   case 1: m.y = from; break;

+   case 2: m.z = from; break;

+   case 3: m.w = from; break;

+   default: assert(!"Should not get here.");

+   }

+

+   m.num_components = MAX2(m.num_components, (to + 1));

+}

+

+void

+ir_assignment::set_lhs(ir_rvalue *lhs)

+{

+   void *mem_ctx = this;

+   bool swizzled = false;

+

+   while (lhs != NULL) {

+      ir_swizzle *swiz = lhs->as_swizzle();

+

+      if (swiz == NULL)

+	 break;

+

+      unsigned write_mask = 0;

+      ir_swizzle_mask rhs_swiz = { 0, 0, 0, 0, 0, 0 };

+

+      for (unsigned i = 0; i < swiz->mask.num_components; i++) {

+	 unsigned c = 0;

+

+	 switch (i) {

+	 case 0: c = swiz->mask.x; break;

+	 case 1: c = swiz->mask.y; break;

+	 case 2: c = swiz->mask.z; break;

+	 case 3: c = swiz->mask.w; break;

+	 default: assert(!"Should not get here.");

+	 }

+

+	 write_mask |= (((this->write_mask >> i) & 1) << c);

+	 update_rhs_swizzle(rhs_swiz, i, c);

+      }

+

+      this->write_mask = write_mask;

+      lhs = swiz->val;

+

+      this->rhs = new(mem_ctx) ir_swizzle(this->rhs, rhs_swiz);

+      swizzled = true;

+   }

+

+   if (swizzled) {

+      /* Now, RHS channels line up with the LHS writemask.  Collapse it

+       * to just the channels that will be written.

+       */

+      ir_swizzle_mask rhs_swiz = { 0, 0, 0, 0, 0, 0 };

+      int rhs_chan = 0;

+      for (int i = 0; i < 4; i++) {

+	 if (write_mask & (1 << i))

+	    update_rhs_swizzle(rhs_swiz, i, rhs_chan++);

+      }

+      this->rhs = new(mem_ctx) ir_swizzle(this->rhs, rhs_swiz);

+   }

+

+   assert((lhs == NULL) || lhs->as_dereference());

+

+   this->lhs = (ir_dereference *) lhs;

+}

+

+ir_variable *

+ir_assignment::whole_variable_written()

+{

+   ir_variable *v = this->lhs->whole_variable_referenced();

+

+   if (v == NULL)

+      return NULL;

+

+   if (v->type->is_scalar())

+      return v;

+

+   if (v->type->is_vector()) {

+      const unsigned mask = (1U << v->type->vector_elements) - 1;

+

+      if (mask != this->write_mask)

+	 return NULL;

+   }

+

+   /* Either all the vector components are assigned or the variable is some

+    * composite type (and the whole thing is assigned.

+    */

+   return v;

+}

+

+ir_assignment::ir_assignment(ir_dereference *lhs, ir_rvalue *rhs,

+			     ir_rvalue *condition, unsigned write_mask)

+{

+   this->ir_type = ir_type_assignment;

+   this->condition = condition;

+   this->rhs = rhs;

+   this->lhs = lhs;

+   this->write_mask = write_mask;

+

+   if (lhs->type->is_scalar() || lhs->type->is_vector()) {

+      int lhs_components = 0;

+      for (int i = 0; i < 4; i++) {

+	 if (write_mask & (1 << i))

+	    lhs_components++;

+      }

+

+      assert(lhs_components == this->rhs->type->vector_elements);

+   }

+}

+

+ir_assignment::ir_assignment(ir_rvalue *lhs, ir_rvalue *rhs,

+			     ir_rvalue *condition)

+{

+   this->ir_type = ir_type_assignment;

+   this->condition = condition;

+   this->rhs = rhs;

+

+   /* If the RHS is a vector type, assume that all components of the vector

+    * type are being written to the LHS.  The write mask comes from the RHS

+    * because we can have a case where the LHS is a vec4 and the RHS is a

+    * vec3.  In that case, the assignment is:

+    *

+    *     (assign (...) (xyz) (var_ref lhs) (var_ref rhs))

+    */

+   if (rhs->type->is_vector())

+      this->write_mask = (1U << rhs->type->vector_elements) - 1;

+   else if (rhs->type->is_scalar())

+      this->write_mask = 1;

+   else

+      this->write_mask = 0;

+

+   this->set_lhs(lhs);

+}

+

+

+ir_expression::ir_expression(int op, const struct glsl_type *type,

+			     ir_rvalue *op0)

+{

+   assert(get_num_operands(ir_expression_operation(op)) == 1);

+   this->ir_type = ir_type_expression;

+   this->type = type;

+   this->operation = ir_expression_operation(op);

+   this->operands[0] = op0;

+   this->operands[1] = NULL;

+   this->operands[2] = NULL;

+   this->operands[3] = NULL;

+}

+

+ir_expression::ir_expression(int op, const struct glsl_type *type,

+			     ir_rvalue *op0, ir_rvalue *op1)

+{

+   assert(((op1 == NULL) && (get_num_operands(ir_expression_operation(op)) == 1))

+	  || (get_num_operands(ir_expression_operation(op)) == 2));

+   this->ir_type = ir_type_expression;

+   this->type = type;

+   this->operation = ir_expression_operation(op);

+   this->operands[0] = op0;

+   this->operands[1] = op1;

+   this->operands[2] = NULL;

+   this->operands[3] = NULL;

+}

+

+ir_expression::ir_expression(int op, const struct glsl_type *type,

+			     ir_rvalue *op0, ir_rvalue *op1,

+			     ir_rvalue *op2, ir_rvalue *op3)

+{

+   this->ir_type = ir_type_expression;

+   this->type = type;

+   this->operation = ir_expression_operation(op);

+   this->operands[0] = op0;

+   this->operands[1] = op1;

+   this->operands[2] = op2;

+   this->operands[3] = op3;

+}

+

+ir_expression::ir_expression(int op, ir_rvalue *op0)

+{

+   this->ir_type = ir_type_expression;

+

+   this->operation = ir_expression_operation(op);

+   this->operands[0] = op0;

+   this->operands[1] = NULL;

+   this->operands[2] = NULL;

+   this->operands[3] = NULL;

+

+   assert(op <= ir_last_unop);

+

+   switch (this->operation) {

+   case ir_unop_bit_not:

+   case ir_unop_logic_not:

+   case ir_unop_neg:

+   case ir_unop_abs:

+   case ir_unop_sign:

+   case ir_unop_rcp:

+   case ir_unop_rsq:

+   case ir_unop_sqrt:

+   case ir_unop_exp:

+   case ir_unop_log:

+   case ir_unop_exp2:

+   case ir_unop_log2:

+   case ir_unop_trunc:

+   case ir_unop_ceil:

+   case ir_unop_floor:

+   case ir_unop_fract:

+   case ir_unop_round_even:

+   case ir_unop_sin:

+   case ir_unop_cos:

+   case ir_unop_sin_reduced:

+   case ir_unop_cos_reduced:

+   case ir_unop_dFdx:

+   case ir_unop_dFdy:

+      this->type = op0->type;

+      break;

+

+   case ir_unop_f2i:

+   case ir_unop_b2i:

+      this->type = glsl_type::get_instance(GLSL_TYPE_INT,

+					   op0->type->vector_elements, 1);

+      break;

+

+   case ir_unop_b2f:

+   case ir_unop_i2f:

+   case ir_unop_u2f:

+      this->type = glsl_type::get_instance(GLSL_TYPE_FLOAT,

+					   op0->type->vector_elements, 1);

+      break;

+

+   case ir_unop_f2b:

+   case ir_unop_i2b:

+      this->type = glsl_type::get_instance(GLSL_TYPE_BOOL,

+					   op0->type->vector_elements, 1);

+      break;

+

+   case ir_unop_noise:

+      this->type = glsl_type::float_type;

+      break;

+

+   case ir_unop_any:

+      this->type = glsl_type::bool_type;

+      break;

+

+   default:

+      assert(!"not reached: missing automatic type setup for ir_expression");

+      this->type = op0->type;

+      break;

+   }

+}

+

+ir_expression::ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1)

+{

+   this->ir_type = ir_type_expression;

+

+   this->operation = ir_expression_operation(op);

+   this->operands[0] = op0;

+   this->operands[1] = op1;

+   this->operands[2] = NULL;

+   this->operands[3] = NULL;

+

+   assert(op > ir_last_unop);

+

+   switch (this->operation) {

+   case ir_binop_all_equal:

+   case ir_binop_any_nequal:

+      this->type = glsl_type::bool_type;

+      break;

+

+   case ir_binop_add:

+   case ir_binop_sub:

+   case ir_binop_min:

+   case ir_binop_max:

+   case ir_binop_pow:

+   case ir_binop_mul:

+   case ir_binop_div:

+   case ir_binop_mod:

+      if (op0->type->is_scalar()) {

+	 this->type = op1->type;

+      } else if (op1->type->is_scalar()) {

+	 this->type = op0->type;

+      } else {

+	 /* FINISHME: matrix types */

+	 assert(!op0->type->is_matrix() && !op1->type->is_matrix());

+	 assert(op0->type == op1->type);

+	 this->type = op0->type;

+      }

+      break;

+

+   case ir_binop_logic_and:

+   case ir_binop_logic_xor:

+   case ir_binop_logic_or:

+   case ir_binop_bit_and:

+   case ir_binop_bit_xor:

+   case ir_binop_bit_or:

+      if (op0->type->is_scalar()) {

+	 this->type = op1->type;

+      } else if (op1->type->is_scalar()) {

+	 this->type = op0->type;

+      }

+      break;

+

+   case ir_binop_equal:

+   case ir_binop_nequal:

+   case ir_binop_lequal:

+   case ir_binop_gequal:

+   case ir_binop_less:

+   case ir_binop_greater:

+      assert(op0->type == op1->type);

+      this->type = glsl_type::get_instance(GLSL_TYPE_BOOL,

+					   op0->type->vector_elements, 1);

+      break;

+

+   case ir_binop_dot:

+      this->type = glsl_type::float_type;

+      break;

+

+   case ir_binop_lshift:

+   case ir_binop_rshift:

+      this->type = op0->type;

+      break;

+

+   default:

+      assert(!"not reached: missing automatic type setup for ir_expression");

+      this->type = glsl_type::float_type;

+   }

+}

+

+unsigned int

+ir_expression::get_num_operands(ir_expression_operation op)

+{

+   assert(op <= ir_last_opcode);

+

+   if (op <= ir_last_unop)

+      return 1;

+

+   if (op <= ir_last_binop)

+      return 2;

+

+   if (op == ir_quadop_vector)

+      return 4;

+

+   assert(false);

+   return 0;

+}

+

+static const char *const operator_strs[] = {

+   "~",

+   "!",

+   "neg",

+   "abs",

+   "sign",

+   "rcp",

+   "rsq",

+   "sqrt",

+   "exp",

+   "log",

+   "exp2",

+   "log2",

+   "f2i",

+   "i2f",

+   "f2b",

+   "b2f",

+   "i2b",

+   "b2i",

+   "u2f",

+   "any",

+   "trunc",

+   "ceil",

+   "floor",

+   "fract",

+   "round_even",

+   "sin",

+   "cos",

+   "sin_reduced",

+   "cos_reduced",

+   "dFdx",

+   "dFdy",

+   "noise",

+   "+",

+   "-",

+   "*",

+   "/",

+   "%",

+   "<",

+   ">",

+   "<=",

+   ">=",

+   "==",

+   "!=",

+   "all_equal",

+   "any_nequal",

+   "<<",

+   ">>",

+   "&",

+   "^",

+   "|",

+   "&&",

+   "^^",

+   "||",

+   "dot",

+   "min",

+   "max",

+   "pow",

+   "vector",

+};

+

+const char *ir_expression::operator_string(ir_expression_operation op)

+{

+   assert((unsigned int) op < Elements(operator_strs));

+   assert(Elements(operator_strs) == (ir_quadop_vector + 1));

+   return operator_strs[op];

+}

+

+const char *ir_expression::operator_string()

+{

+   return operator_string(this->operation);

+}

+

+const char*

+depth_layout_string(ir_depth_layout layout)

+{

+   switch(layout) {

+   case ir_depth_layout_none:      return "";

+   case ir_depth_layout_any:       return "depth_any";

+   case ir_depth_layout_greater:   return "depth_greater";

+   case ir_depth_layout_less:      return "depth_less";

+   case ir_depth_layout_unchanged: return "depth_unchanged";

+

+   default:

+      assert(0);

+      return "";

+   }

+}

+

+ir_expression_operation

+ir_expression::get_operator(const char *str)

+{

+   const int operator_count = sizeof(operator_strs) / sizeof(operator_strs[0]);

+   for (int op = 0; op < operator_count; op++) {

+      if (strcmp(str, operator_strs[op]) == 0)

+	 return (ir_expression_operation) op;

+   }

+   return (ir_expression_operation) -1;

+}

+

+ir_constant::ir_constant()

+{

+   this->ir_type = ir_type_constant;

+}

+

+ir_constant::ir_constant(const struct glsl_type *type,

+			 const ir_constant_data *data)

+{

+   assert((type->base_type >= GLSL_TYPE_UINT)

+	  && (type->base_type <= GLSL_TYPE_BOOL));

+

+   this->ir_type = ir_type_constant;

+   this->type = type;

+   memcpy(& this->value, data, sizeof(this->value));

+}

+

+ir_constant::ir_constant(float f)

+{

+   this->ir_type = ir_type_constant;

+   this->type = glsl_type::float_type;

+   this->value.f[0] = f;

+   for (int i = 1; i < 16; i++)  {

+      this->value.f[i] = 0;

+   }

+}

+

+ir_constant::ir_constant(unsigned int u)

+{

+   this->ir_type = ir_type_constant;

+   this->type = glsl_type::uint_type;

+   this->value.u[0] = u;

+   for (int i = 1; i < 16; i++) {

+      this->value.u[i] = 0;

+   }

+}

+

+ir_constant::ir_constant(int i)

+{

+   this->ir_type = ir_type_constant;

+   this->type = glsl_type::int_type;

+   this->value.i[0] = i;

+   for (int i = 1; i < 16; i++) {

+      this->value.i[i] = 0;

+   }

+}

+

+ir_constant::ir_constant(bool b)

+{

+   this->ir_type = ir_type_constant;

+   this->type = glsl_type::bool_type;

+   this->value.b[0] = b;

+   for (int i = 1; i < 16; i++) {

+      this->value.b[i] = false;

+   }

+}

+

+ir_constant::ir_constant(const ir_constant *c, unsigned i)

+{

+   this->ir_type = ir_type_constant;

+   this->type = c->type->get_base_type();

+

+   switch (this->type->base_type) {

+   case GLSL_TYPE_UINT:  this->value.u[0] = c->value.u[i]; break;

+   case GLSL_TYPE_INT:   this->value.i[0] = c->value.i[i]; break;

+   case GLSL_TYPE_FLOAT: this->value.f[0] = c->value.f[i]; break;

+   case GLSL_TYPE_BOOL:  this->value.b[0] = c->value.b[i]; break;

+   default:              assert(!"Should not get here."); break;

+   }

+}

+

+ir_constant::ir_constant(const struct glsl_type *type, exec_list *value_list)

+{

+   this->ir_type = ir_type_constant;

+   this->type = type;

+

+   assert(type->is_scalar() || type->is_vector() || type->is_matrix()

+	  || type->is_record() || type->is_array());

+

+   if (type->is_array()) {

+      this->array_elements = ralloc_array(this, ir_constant *, type->length);

+      unsigned i = 0;

+      foreach_list(node, value_list) {

+	 ir_constant *value = (ir_constant *) node;

+	 assert(value->as_constant() != NULL);

+

+	 this->array_elements[i++] = value;

+      }

+      return;

+   }

+

+   /* If the constant is a record, the types of each of the entries in

+    * value_list must be a 1-for-1 match with the structure components.  Each

+    * entry must also be a constant.  Just move the nodes from the value_list

+    * to the list in the ir_constant.

+    */

+   /* FINISHME: Should there be some type checking and / or assertions here? */

+   /* FINISHME: Should the new constant take ownership of the nodes from

+    * FINISHME: value_list, or should it make copies?

+    */

+   if (type->is_record()) {

+      value_list->move_nodes_to(& this->components);

+      return;

+   }

+

+   for (unsigned i = 0; i < 16; i++) {

+      this->value.u[i] = 0;

+   }

+

+   ir_constant *value = (ir_constant *) (value_list->head);

+

+   /* Constructors with exactly one scalar argument are special for vectors

+    * and matrices.  For vectors, the scalar value is replicated to fill all

+    * the components.  For matrices, the scalar fills the components of the

+    * diagonal while the rest is filled with 0.

+    */

+   if (value->type->is_scalar() && value->next->is_tail_sentinel()) {

+      if (type->is_matrix()) {

+	 /* Matrix - fill diagonal (rest is already set to 0) */

+	 assert(type->base_type == GLSL_TYPE_FLOAT);

+	 for (unsigned i = 0; i < type->matrix_columns; i++)

+	    this->value.f[i * type->vector_elements + i] = value->value.f[0];

+      } else {

+	 /* Vector or scalar - fill all components */

+	 switch (type->base_type) {

+	 case GLSL_TYPE_UINT:

+	 case GLSL_TYPE_INT:

+	    for (unsigned i = 0; i < type->components(); i++)

+	       this->value.u[i] = value->value.u[0];

+	    break;

+	 case GLSL_TYPE_FLOAT:

+	    for (unsigned i = 0; i < type->components(); i++)

+	       this->value.f[i] = value->value.f[0];

+	    break;

+	 case GLSL_TYPE_BOOL:

+	    for (unsigned i = 0; i < type->components(); i++)

+	       this->value.b[i] = value->value.b[0];

+	    break;

+	 default:

+	    assert(!"Should not get here.");

+	    break;

+	 }

+      }

+      return;

+   }

+

+   if (type->is_matrix() && value->type->is_matrix()) {

+      assert(value->next->is_tail_sentinel());

+

+      /* From section 5.4.2 of the GLSL 1.20 spec:

+       * "If a matrix is constructed from a matrix, then each component

+       *  (column i, row j) in the result that has a corresponding component

+       *  (column i, row j) in the argument will be initialized from there."

+       */

+      unsigned cols = MIN2(type->matrix_columns, value->type->matrix_columns);

+      unsigned rows = MIN2(type->vector_elements, value->type->vector_elements);

+      for (unsigned i = 0; i < cols; i++) {

+	 for (unsigned j = 0; j < rows; j++) {

+	    const unsigned src = i * value->type->vector_elements + j;

+	    const unsigned dst = i * type->vector_elements + j;

+	    this->value.f[dst] = value->value.f[src];

+	 }

+      }

+

+      /* "All other components will be initialized to the identity matrix." */

+      for (unsigned i = cols; i < type->matrix_columns; i++)

+	 this->value.f[i * type->vector_elements + i] = 1.0;

+

+      return;

+   }

+

+   /* Use each component from each entry in the value_list to initialize one

+    * component of the constant being constructed.

+    */

+   for (unsigned i = 0; i < type->components(); /* empty */) {

+      assert(value->as_constant() != NULL);

+      assert(!value->is_tail_sentinel());

+

+      for (unsigned j = 0; j < value->type->components(); j++) {

+	 switch (type->base_type) {

+	 case GLSL_TYPE_UINT:

+	    this->value.u[i] = value->get_uint_component(j);

+	    break;

+	 case GLSL_TYPE_INT:

+	    this->value.i[i] = value->get_int_component(j);

+	    break;

+	 case GLSL_TYPE_FLOAT:

+	    this->value.f[i] = value->get_float_component(j);

+	    break;

+	 case GLSL_TYPE_BOOL:

+	    this->value.b[i] = value->get_bool_component(j);

+	    break;

+	 default:

+	    /* FINISHME: What to do?  Exceptions are not the answer.

+	     */

+	    break;

+	 }

+

+	 i++;

+	 if (i >= type->components())

+	    break;

+      }

+

+      value = (ir_constant *) value->next;

+   }

+}

+

+ir_constant *

+ir_constant::zero(void *mem_ctx, const glsl_type *type)

+{

+   assert(type->is_numeric() || type->is_boolean());

+

+   ir_constant *c = new(mem_ctx) ir_constant;

+   c->type = type;

+   memset(&c->value, 0, sizeof(c->value));

+

+   return c;

+}

+

+bool

+ir_constant::get_bool_component(unsigned i) const

+{

+   switch (this->type->base_type) {

+   case GLSL_TYPE_UINT:  return this->value.u[i] != 0;

+   case GLSL_TYPE_INT:   return this->value.i[i] != 0;

+   case GLSL_TYPE_FLOAT: return ((int)this->value.f[i]) != 0;

+   case GLSL_TYPE_BOOL:  return this->value.b[i];

+   default:              assert(!"Should not get here."); break;

+   }

+

+   /* Must return something to make the compiler happy.  This is clearly an

+    * error case.

+    */

+   return false;

+}

+

+float

+ir_constant::get_float_component(unsigned i) const

+{

+   switch (this->type->base_type) {

+   case GLSL_TYPE_UINT:  return (float) this->value.u[i];

+   case GLSL_TYPE_INT:   return (float) this->value.i[i];

+   case GLSL_TYPE_FLOAT: return this->value.f[i];

+   case GLSL_TYPE_BOOL:  return this->value.b[i] ? 1.0 : 0.0;

+   default:              assert(!"Should not get here."); break;

+   }

+

+   /* Must return something to make the compiler happy.  This is clearly an

+    * error case.

+    */

+   return 0.0;

+}

+

+int

+ir_constant::get_int_component(unsigned i) const

+{

+   switch (this->type->base_type) {

+   case GLSL_TYPE_UINT:  return this->value.u[i];

+   case GLSL_TYPE_INT:   return this->value.i[i];

+   case GLSL_TYPE_FLOAT: return (int) this->value.f[i];

+   case GLSL_TYPE_BOOL:  return this->value.b[i] ? 1 : 0;

+   default:              assert(!"Should not get here."); break;

+   }

+

+   /* Must return something to make the compiler happy.  This is clearly an

+    * error case.

+    */

+   return 0;

+}

+

+unsigned

+ir_constant::get_uint_component(unsigned i) const

+{

+   switch (this->type->base_type) {

+   case GLSL_TYPE_UINT:  return this->value.u[i];

+   case GLSL_TYPE_INT:   return this->value.i[i];

+   case GLSL_TYPE_FLOAT: return (unsigned) this->value.f[i];

+   case GLSL_TYPE_BOOL:  return this->value.b[i] ? 1 : 0;

+   default:              assert(!"Should not get here."); break;

+   }

+

+   /* Must return something to make the compiler happy.  This is clearly an

+    * error case.

+    */

+   return 0;

+}

+

+ir_constant *

+ir_constant::get_array_element(unsigned i) const

+{

+   assert(this->type->is_array());

+

+   /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:

+    *

+    *     "Behavior is undefined if a shader subscripts an array with an index

+    *     less than 0 or greater than or equal to the size the array was

+    *     declared with."

+    *

+    * Most out-of-bounds accesses are removed before things could get this far.

+    * There are cases where non-constant array index values can get constant

+    * folded.

+    */

+   if (int(i) < 0)

+      i = 0;

+   else if (i >= this->type->length)

+      i = this->type->length - 1;

+

+   return array_elements[i];

+}

+

+ir_constant *

+ir_constant::get_record_field(const char *name)

+{

+   int idx = this->type->field_index(name);

+

+   if (idx < 0)

+      return NULL;

+

+   if (this->components.is_empty())

+      return NULL;

+

+   exec_node *node = this->components.head;

+   for (int i = 0; i < idx; i++) {

+      node = node->next;

+

+      /* If the end of the list is encountered before the element matching the

+       * requested field is found, return NULL.

+       */

+      if (node->is_tail_sentinel())

+	 return NULL;

+   }

+

+   return (ir_constant *) node;

+}

+

+

+bool

+ir_constant::has_value(const ir_constant *c) const

+{

+   if (this->type != c->type)

+      return false;

+

+   if (this->type->is_array()) {

+      for (unsigned i = 0; i < this->type->length; i++) {

+	 if (!this->array_elements[i]->has_value(c->array_elements[i]))

+	    return false;

+      }

+      return true;

+   }

+

+   if (this->type->base_type == GLSL_TYPE_STRUCT) {

+      const exec_node *a_node = this->components.head;

+      const exec_node *b_node = c->components.head;

+

+      while (!a_node->is_tail_sentinel()) {

+	 assert(!b_node->is_tail_sentinel());

+

+	 const ir_constant *const a_field = (ir_constant *) a_node;

+	 const ir_constant *const b_field = (ir_constant *) b_node;

+

+	 if (!a_field->has_value(b_field))

+	    return false;

+

+	 a_node = a_node->next;

+	 b_node = b_node->next;

+      }

+

+      return true;

+   }

+

+   for (unsigned i = 0; i < this->type->components(); i++) {

+      switch (this->type->base_type) {

+      case GLSL_TYPE_UINT:

+	 if (this->value.u[i] != c->value.u[i])

+	    return false;

+	 break;

+      case GLSL_TYPE_INT:

+	 if (this->value.i[i] != c->value.i[i])

+	    return false;

+	 break;

+      case GLSL_TYPE_FLOAT:

+	 if (this->value.f[i] != c->value.f[i])

+	    return false;

+	 break;

+      case GLSL_TYPE_BOOL:

+	 if (this->value.b[i] != c->value.b[i])

+	    return false;

+	 break;

+      default:

+	 assert(!"Should not get here.");

+	 return false;

+      }

+   }

+

+   return true;

+}

+

+bool

+ir_constant::is_zero() const

+{

+   if (!this->type->is_scalar() && !this->type->is_vector())

+      return false;

+

+   for (unsigned c = 0; c < this->type->vector_elements; c++) {

+      switch (this->type->base_type) {

+      case GLSL_TYPE_FLOAT:

+	 if (this->value.f[c] != 0.0)

+	    return false;

+	 break;

+      case GLSL_TYPE_INT:

+	 if (this->value.i[c] != 0)

+	    return false;

+	 break;

+      case GLSL_TYPE_UINT:

+	 if (this->value.u[c] != 0)

+	    return false;

+	 break;

+      case GLSL_TYPE_BOOL:

+	 if (this->value.b[c] != false)

+	    return false;

+	 break;

+      default:

+	 /* The only other base types are structures, arrays, and samplers.

+	  * Samplers cannot be constants, and the others should have been

+	  * filtered out above.

+	  */

+	 assert(!"Should not get here.");

+	 return false;

+      }

+   }

+

+   return true;

+}

+

+bool

+ir_constant::is_one() const

+{

+   if (!this->type->is_scalar() && !this->type->is_vector())

+      return false;

+

+   for (unsigned c = 0; c < this->type->vector_elements; c++) {

+      switch (this->type->base_type) {

+      case GLSL_TYPE_FLOAT:

+	 if (this->value.f[c] != 1.0)

+	    return false;

+	 break;

+      case GLSL_TYPE_INT:

+	 if (this->value.i[c] != 1)

+	    return false;

+	 break;

+      case GLSL_TYPE_UINT:

+	 if (this->value.u[c] != 1)

+	    return false;

+	 break;

+      case GLSL_TYPE_BOOL:

+	 if (this->value.b[c] != true)

+	    return false;

+	 break;

+      default:

+	 /* The only other base types are structures, arrays, and samplers.

+	  * Samplers cannot be constants, and the others should have been

+	  * filtered out above.

+	  */

+	 assert(!"Should not get here.");

+	 return false;

+      }

+   }

+

+   return true;

+}

+

+bool

+ir_constant::is_negative_one() const

+{

+   if (!this->type->is_scalar() && !this->type->is_vector())

+      return false;

+

+   if (this->type->is_boolean())

+      return false;

+

+   for (unsigned c = 0; c < this->type->vector_elements; c++) {

+      switch (this->type->base_type) {

+      case GLSL_TYPE_FLOAT:

+	 if (this->value.f[c] != -1.0)

+	    return false;

+	 break;

+      case GLSL_TYPE_INT:

+	 if (this->value.i[c] != -1)

+	    return false;

+	 break;

+      case GLSL_TYPE_UINT:

+	 if (int(this->value.u[c]) != -1)

+	    return false;

+	 break;

+      default:

+	 /* The only other base types are structures, arrays, samplers, and

+	  * booleans.  Samplers cannot be constants, and the others should

+	  * have been filtered out above.

+	  */

+	 assert(!"Should not get here.");

+	 return false;

+      }

+   }

+

+   return true;

+}

+

+ir_loop::ir_loop()

+{

+   this->ir_type = ir_type_loop;

+   this->cmp = ir_unop_neg;

+   this->from = NULL;

+   this->to = NULL;

+   this->increment = NULL;

+   this->counter = NULL;

+}

+

+

+ir_dereference_variable::ir_dereference_variable(ir_variable *var)

+{

+   this->ir_type = ir_type_dereference_variable;

+   this->var = var;

+   this->type = (var != NULL) ? var->type : glsl_type::error_type;

+}

+

+

+ir_dereference_array::ir_dereference_array(ir_rvalue *value,

+					   ir_rvalue *array_index)

+{

+   this->ir_type = ir_type_dereference_array;

+   this->array_index = array_index;

+   this->set_array(value);

+}

+

+

+ir_dereference_array::ir_dereference_array(ir_variable *var,

+					   ir_rvalue *array_index)

+{

+   void *ctx = ralloc_parent(var);

+

+   this->ir_type = ir_type_dereference_array;

+   this->array_index = array_index;

+   this->set_array(new(ctx) ir_dereference_variable(var));

+}

+

+

+void

+ir_dereference_array::set_array(ir_rvalue *value)

+{

+   this->array = value;

+   this->type = glsl_type::error_type;

+

+   if (this->array != NULL) {

+      const glsl_type *const vt = this->array->type;

+

+      if (vt->is_array()) {

+	 type = vt->element_type();

+      } else if (vt->is_matrix()) {

+	 type = vt->column_type();

+      } else if (vt->is_vector()) {

+	 type = vt->get_base_type();

+      }

+   }

+}

+

+

+ir_dereference_record::ir_dereference_record(ir_rvalue *value,

+					     const char *field)

+{

+   this->ir_type = ir_type_dereference_record;

+   this->record = value;

+   this->field = ralloc_strdup(this, field);

+   this->type = (this->record != NULL)

+      ? this->record->type->field_type(field) : glsl_type::error_type;

+}

+

+

+ir_dereference_record::ir_dereference_record(ir_variable *var,

+					     const char *field)

+{

+   void *ctx = ralloc_parent(var);

+

+   this->ir_type = ir_type_dereference_record;

+   this->record = new(ctx) ir_dereference_variable(var);

+   this->field = ralloc_strdup(this, field);

+   this->type = (this->record != NULL)

+      ? this->record->type->field_type(field) : glsl_type::error_type;

+}

+

+bool type_contains_sampler(const glsl_type *type)

+{

+   if (type->is_array()) {

+      return type_contains_sampler(type->fields.array);

+   } else if (type->is_record()) {

+      for (unsigned int i = 0; i < type->length; i++) {

+	 if (type_contains_sampler(type->fields.structure[i].type))

+	    return true;

+      }

+      return false;

+   } else {

+      return type->is_sampler();

+   }

+}

+

+bool

+ir_dereference::is_lvalue()

+{

+   ir_variable *var = this->variable_referenced();

+

+   /* Every l-value derference chain eventually ends in a variable.

+    */

+   if ((var == NULL) || var->read_only)

+      return false;

+

+   if (this->type->is_array() && !var->array_lvalue)

+      return false;

+

+   /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:

+    *

+    *    "Samplers cannot be treated as l-values; hence cannot be used

+    *     as out or inout function parameters, nor can they be

+    *     assigned into."

+    */

+   if (type_contains_sampler(this->type))

+      return false;

+

+   return true;

+}

+

+

+const char *tex_opcode_strs[] = { "tex", "txb", "txl", "txd", "txf" };

+

+const char *ir_texture::opcode_string()

+{

+   assert((unsigned int) op <=

+	  sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]));

+   return tex_opcode_strs[op];

+}

+

+ir_texture_opcode

+ir_texture::get_opcode(const char *str)

+{

+   const int count = sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]);

+   for (int op = 0; op < count; op++) {

+      if (strcmp(str, tex_opcode_strs[op]) == 0)

+	 return (ir_texture_opcode) op;

+   }

+   return (ir_texture_opcode) -1;

+}

+

+

+void

+ir_texture::set_sampler(ir_dereference *sampler, const glsl_type *type)

+{

+   assert(sampler != NULL);

+   assert(type != NULL);

+   this->sampler = sampler;

+   this->type = type;

+

+   assert(sampler->type->sampler_type == type->base_type);

+   if (sampler->type->sampler_shadow)

+      assert(type->vector_elements == 4 || type->vector_elements == 1);

+   else

+      assert(type->vector_elements == 4);

+}

+

+

+void

+ir_swizzle::init_mask(const unsigned *comp, unsigned count)

+{

+   assert((count >= 1) && (count <= 4));

+

+   memset(&this->mask, 0, sizeof(this->mask));

+   this->mask.num_components = count;

+

+   unsigned dup_mask = 0;

+   switch (count) {

+   case 4:

+      assert(comp[3] <= 3);

+      dup_mask |= (1U << comp[3])

+	 & ((1U << comp[0]) | (1U << comp[1]) | (1U << comp[2]));

+      this->mask.w = comp[3];

+

+   case 3:

+      assert(comp[2] <= 3);

+      dup_mask |= (1U << comp[2])

+	 & ((1U << comp[0]) | (1U << comp[1]));

+      this->mask.z = comp[2];

+

+   case 2:

+      assert(comp[1] <= 3);

+      dup_mask |= (1U << comp[1])

+	 & ((1U << comp[0]));

+      this->mask.y = comp[1];

+

+   case 1:

+      assert(comp[0] <= 3);

+      this->mask.x = comp[0];

+   }

+

+   this->mask.has_duplicates = dup_mask != 0;

+

+   /* Based on the number of elements in the swizzle and the base type

+    * (i.e., float, int, unsigned, or bool) of the vector being swizzled,

+    * generate the type of the resulting value.

+    */

+   type = glsl_type::get_instance(val->type->base_type, mask.num_components, 1);

+}

+

+ir_swizzle::ir_swizzle(ir_rvalue *val, unsigned x, unsigned y, unsigned z,

+		       unsigned w, unsigned count)

+   : val(val)

+{

+   const unsigned components[4] = { x, y, z, w };

+   this->ir_type = ir_type_swizzle;

+   this->init_mask(components, count);

+}

+

+ir_swizzle::ir_swizzle(ir_rvalue *val, const unsigned *comp,

+		       unsigned count)

+   : val(val)

+{

+   this->ir_type = ir_type_swizzle;

+   this->init_mask(comp, count);

+}

+

+ir_swizzle::ir_swizzle(ir_rvalue *val, ir_swizzle_mask mask)

+{

+   this->ir_type = ir_type_swizzle;

+   this->val = val;

+   this->mask = mask;

+   this->type = glsl_type::get_instance(val->type->base_type,

+					mask.num_components, 1);

+}

+

+#define X 1

+#define R 5

+#define S 9

+#define I 13

+

+ir_swizzle *

+ir_swizzle::create(ir_rvalue *val, const char *str, unsigned vector_length)

+{

+   void *ctx = ralloc_parent(val);

+

+   /* For each possible swizzle character, this table encodes the value in

+    * \c idx_map that represents the 0th element of the vector.  For invalid

+    * swizzle characters (e.g., 'k'), a special value is used that will allow

+    * detection of errors.

+    */

+   static const unsigned char base_idx[26] = {

+   /* a  b  c  d  e  f  g  h  i  j  k  l  m */

+      R, R, I, I, I, I, R, I, I, I, I, I, I,

+   /* n  o  p  q  r  s  t  u  v  w  x  y  z */

+      I, I, S, S, R, S, S, I, I, X, X, X, X

+   };

+

+   /* Each valid swizzle character has an entry in the previous table.  This

+    * table encodes the base index encoded in the previous table plus the actual

+    * index of the swizzle character.  When processing swizzles, the first

+    * character in the string is indexed in the previous table.  Each character

+    * in the string is indexed in this table, and the value found there has the

+    * value form the first table subtracted.  The result must be on the range

+    * [0,3].

+    *

+    * For example, the string "wzyx" will get X from the first table.  Each of

+    * the charcaters will get X+3, X+2, X+1, and X+0 from this table.  After

+    * subtraction, the swizzle values are { 3, 2, 1, 0 }.

+    *

+    * The string "wzrg" will get X from the first table.  Each of the characters

+    * will get X+3, X+2, R+0, and R+1 from this table.  After subtraction, the

+    * swizzle values are { 3, 2, 4, 5 }.  Since 4 and 5 are outside the range

+    * [0,3], the error is detected.

+    */

+   static const unsigned char idx_map[26] = {

+   /* a    b    c    d    e    f    g    h    i    j    k    l    m */

+      R+3, R+2, 0,   0,   0,   0,   R+1, 0,   0,   0,   0,   0,   0,

+   /* n    o    p    q    r    s    t    u    v    w    x    y    z */

+      0,   0,   S+2, S+3, R+0, S+0, S+1, 0,   0,   X+3, X+0, X+1, X+2

+   };

+

+   int swiz_idx[4] = { 0, 0, 0, 0 };

+   unsigned i;

+

+

+   /* Validate the first character in the swizzle string and look up the base

+    * index value as described above.

+    */

+   if ((str[0] < 'a') || (str[0] > 'z'))

+      return NULL;

+

+   const unsigned base = base_idx[str[0] - 'a'];

+

+

+   for (i = 0; (i < 4) && (str[i] != '\0'); i++) {

+      /* Validate the next character, and, as described above, convert it to a

+       * swizzle index.

+       */

+      if ((str[i] < 'a') || (str[i] > 'z'))

+	 return NULL;

+

+      swiz_idx[i] = idx_map[str[i] - 'a'] - base;

+      if ((swiz_idx[i] < 0) || (swiz_idx[i] >= (int) vector_length))

+	 return NULL;

+   }

+

+   if (str[i] != '\0')

+	 return NULL;

+

+   return new(ctx) ir_swizzle(val, swiz_idx[0], swiz_idx[1], swiz_idx[2],

+			      swiz_idx[3], i);

+}

+

+#undef X

+#undef R

+#undef S

+#undef I

+

+ir_variable *

+ir_swizzle::variable_referenced()

+{

+   return this->val->variable_referenced();

+}

+

+

+ir_variable::ir_variable(const struct glsl_type *type, const char *name,

+			 ir_variable_mode mode)

+   : max_array_access(0), read_only(false), centroid(false), invariant(false),

+     mode(mode), interpolation(ir_var_smooth), array_lvalue(false)

+{

+   this->ir_type = ir_type_variable;

+   this->type = type;

+   this->name = ralloc_strdup(this, name);

+   this->explicit_location = false;

+   this->location = -1;

+   this->warn_extension = NULL;

+   this->constant_value = NULL;

+   this->origin_upper_left = false;

+   this->pixel_center_integer = false;

+   this->depth_layout = ir_depth_layout_none;

+   this->used = false;

+

+   if (type && type->base_type == GLSL_TYPE_SAMPLER)

+      this->read_only = true;

+}

+

+

+const char *

+ir_variable::interpolation_string() const

+{

+   switch (this->interpolation) {

+   case ir_var_smooth:        return "smooth";

+   case ir_var_flat:          return "flat";

+   case ir_var_noperspective: return "noperspective";

+   }

+

+   assert(!"Should not get here.");

+   return "";

+}

+

+

+unsigned

+ir_variable::component_slots() const

+{

+   /* FINISHME: Sparsely accessed arrays require fewer slots. */

+   return this->type->component_slots();

+}

+

+

+ir_function_signature::ir_function_signature(const glsl_type *return_type)

+   : return_type(return_type), is_defined(false), _function(NULL)

+{

+   this->ir_type = ir_type_function_signature;

+   this->is_builtin = false;

+}

+

+

+static bool

+modes_match(unsigned a, unsigned b)

+{

+   if (a == b)

+      return true;

+

+   /* Accept "in" vs. "const in" */

+   if ((a == ir_var_const_in && b == ir_var_in) ||

+       (b == ir_var_const_in && a == ir_var_in))

+      return true;

+

+   return false;

+}

+

+

+const char *

+ir_function_signature::qualifiers_match(exec_list *params)

+{

+   exec_list_iterator iter_a = parameters.iterator();

+   exec_list_iterator iter_b = params->iterator();

+

+   /* check that the qualifiers match. */

+   while (iter_a.has_next()) {

+      ir_variable *a = (ir_variable *)iter_a.get();

+      ir_variable *b = (ir_variable *)iter_b.get();

+

+      if (a->read_only != b->read_only ||

+	  !modes_match(a->mode, b->mode) ||

+	  a->interpolation != b->interpolation ||

+	  a->centroid != b->centroid) {

+

+	 /* parameter a's qualifiers don't match */

+	 return a->name;

+      }

+

+      iter_a.next();

+      iter_b.next();

+   }

+   return NULL;

+}

+

+

+void

+ir_function_signature::replace_parameters(exec_list *new_params)

+{

+   /* Destroy all of the previous parameter information.  If the previous

+    * parameter information comes from the function prototype, it may either

+    * specify incorrect parameter names or not have names at all.

+    */

+   foreach_iter(exec_list_iterator, iter, parameters) {

+      assert(((ir_instruction *) iter.get())->as_variable() != NULL);

+

+      iter.remove();

+   }

+

+   new_params->move_nodes_to(&parameters);

+}

+

+

+ir_function::ir_function(const char *name)

+{

+   this->ir_type = ir_type_function;

+   this->name = ralloc_strdup(this, name);

+}

+

+

+bool

+ir_function::has_user_signature()

+{

+   foreach_list(n, &this->signatures) {

+      ir_function_signature *const sig = (ir_function_signature *) n;

+      if (!sig->is_builtin)

+	 return true;

+   }

+   return false;

+}

+

+

+ir_call *

+ir_call::get_error_instruction(void *ctx)

+{

+   ir_call *call = new(ctx) ir_call;

+

+   call->type = glsl_type::error_type;

+   return call;

+}

+

+void

+ir_call::set_callee(ir_function_signature *sig)

+{

+   assert((this->type == NULL) || (this->type == sig->return_type));

+

+   this->callee = sig;

+}

+

+void

+visit_exec_list(exec_list *list, ir_visitor *visitor)

+{

+   foreach_iter(exec_list_iterator, iter, *list) {

+      ((ir_instruction *)iter.get())->accept(visitor);

+   }

+}

+

+

+static void

+steal_memory(ir_instruction *ir, void *new_ctx)

+{

+   ir_variable *var = ir->as_variable();

+   ir_constant *constant = ir->as_constant();

+   if (var != NULL && var->constant_value != NULL)

+      steal_memory(var->constant_value, ir);

+

+   /* The components of aggregate constants are not visited by the normal

+    * visitor, so steal their values by hand.

+    */

+   if (constant != NULL) {

+      if (constant->type->is_record()) {

+	 foreach_iter(exec_list_iterator, iter, constant->components) {

+	    ir_constant *field = (ir_constant *)iter.get();

+	    steal_memory(field, ir);

+	 }

+      } else if (constant->type->is_array()) {

+	 for (unsigned int i = 0; i < constant->type->length; i++) {

+	    steal_memory(constant->array_elements[i], ir);

+	 }

+      }

+   }

+

+   ralloc_steal(new_ctx, ir);

+}

+

+

+void

+reparent_ir(exec_list *list, void *mem_ctx)

+{

+   foreach_list(node, list) {

+      visit_tree((ir_instruction *) node, steal_memory, mem_ctx);

+   }

+}

+

+

+static ir_rvalue *

+try_min_one(ir_rvalue *ir)

+{

+   ir_expression *expr = ir->as_expression();

+

+   if (!expr || expr->operation != ir_binop_min)

+      return NULL;

+

+   if (expr->operands[0]->is_one())

+      return expr->operands[1];

+

+   if (expr->operands[1]->is_one())

+      return expr->operands[0];

+

+   return NULL;

+}

+

+static ir_rvalue *

+try_max_zero(ir_rvalue *ir)

+{

+   ir_expression *expr = ir->as_expression();

+

+   if (!expr || expr->operation != ir_binop_max)

+      return NULL;

+

+   if (expr->operands[0]->is_zero())

+      return expr->operands[1];

+

+   if (expr->operands[1]->is_zero())

+      return expr->operands[0];

+

+   return NULL;

+}

+

+ir_rvalue *

+ir_rvalue::as_rvalue_to_saturate()

+{

+   ir_expression *expr = this->as_expression();

+

+   if (!expr)

+      return NULL;

+

+   ir_rvalue *max_zero = try_max_zero(expr);

+   if (max_zero) {

+      return try_min_one(max_zero);

+   } else {

+      ir_rvalue *min_one = try_min_one(expr);

+      if (min_one) {

+	 return try_max_zero(min_one);

+      }

+   }

+

+   return NULL;

+}

diff --git a/mesalib/src/glsl/ir.h b/mesalib/src/glsl/ir.h
index f2f902c0a..72e3e35c4 100644
--- a/mesalib/src/glsl/ir.h
+++ b/mesalib/src/glsl/ir.h
@@ -1,1640 +1,1640 @@
-/* -*- c++ -*- */
-/*
- * Copyright © 2010 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- */
-
-#pragma once
-#ifndef IR_H
-#define IR_H
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "ralloc.h"
-#include "glsl_types.h"
-#include "list.h"
-#include "ir_visitor.h"
-#include "ir_hierarchical_visitor.h"
-
-/**
- * \defgroup IR Intermediate representation nodes
- *
- * @{
- */
-
-/**
- * Class tags
- *
- * Each concrete class derived from \c ir_instruction has a value in this
- * enumerant.  The value for the type is stored in \c ir_instruction::ir_type
- * by the constructor.  While using type tags is not very C++, it is extremely
- * convenient.  For example, during debugging you can simply inspect
- * \c ir_instruction::ir_type to find out the actual type of the object.
- *
- * In addition, it is possible to use a switch-statement based on \c
- * \c ir_instruction::ir_type to select different behavior for different object
- * types.  For functions that have only slight differences for several object
- * types, this allows writing very straightforward, readable code.
- */
-enum ir_node_type {
-   /**
-    * Zero is unused so that the IR validator can detect cases where
-    * \c ir_instruction::ir_type has not been initialized.
-    */
-   ir_type_unset,
-   ir_type_variable,
-   ir_type_assignment,
-   ir_type_call,
-   ir_type_constant,
-   ir_type_dereference_array,
-   ir_type_dereference_record,
-   ir_type_dereference_variable,
-   ir_type_discard,
-   ir_type_expression,
-   ir_type_function,
-   ir_type_function_signature,
-   ir_type_if,
-   ir_type_loop,
-   ir_type_loop_jump,
-   ir_type_return,
-   ir_type_swizzle,
-   ir_type_texture,
-   ir_type_max /**< maximum ir_type enum number, for validation */
-};
-
-/**
- * Base class of all IR instructions
- */
-class ir_instruction : public exec_node {
-public:
-   enum ir_node_type ir_type;
-   const struct glsl_type *type;
-
-   /** ir_print_visitor helper for debugging. */
-   void print(void) const;
-
-   virtual void accept(ir_visitor *) = 0;
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *) = 0;
-   virtual ir_instruction *clone(void *mem_ctx,
-				 struct hash_table *ht) const = 0;
-
-   /**
-    * \name IR instruction downcast functions
-    *
-    * These functions either cast the object to a derived class or return
-    * \c NULL if the object's type does not match the specified derived class.
-    * Additional downcast functions will be added as needed.
-    */
-   /*@{*/
-   virtual class ir_variable *          as_variable()         { return NULL; }
-   virtual class ir_function *          as_function()         { return NULL; }
-   virtual class ir_dereference *       as_dereference()      { return NULL; }
-   virtual class ir_dereference_array *	as_dereference_array() { return NULL; }
-   virtual class ir_dereference_variable *as_dereference_variable() { return NULL; }
-   virtual class ir_expression *        as_expression()       { return NULL; }
-   virtual class ir_rvalue *            as_rvalue()           { return NULL; }
-   virtual class ir_loop *              as_loop()             { return NULL; }
-   virtual class ir_assignment *        as_assignment()       { return NULL; }
-   virtual class ir_call *              as_call()             { return NULL; }
-   virtual class ir_return *            as_return()           { return NULL; }
-   virtual class ir_if *                as_if()               { return NULL; }
-   virtual class ir_swizzle *           as_swizzle()          { return NULL; }
-   virtual class ir_constant *          as_constant()         { return NULL; }
-   virtual class ir_discard *           as_discard()          { return NULL; }
-   /*@}*/
-
-protected:
-   ir_instruction()
-   {
-      ir_type = ir_type_unset;
-      type = NULL;
-   }
-};
-
-
-class ir_rvalue : public ir_instruction {
-public:
-   virtual ir_rvalue *clone(void *mem_ctx, struct hash_table *) const = 0;
-
-   virtual ir_constant *constant_expression_value() = 0;
-
-   virtual ir_rvalue * as_rvalue()
-   {
-      return this;
-   }
-
-   ir_rvalue *as_rvalue_to_saturate();
-
-   virtual bool is_lvalue()
-   {
-      return false;
-   }
-
-   /**
-    * Get the variable that is ultimately referenced by an r-value
-    */
-   virtual ir_variable *variable_referenced()
-   {
-      return NULL;
-   }
-
-
-   /**
-    * If an r-value is a reference to a whole variable, get that variable
-    *
-    * \return
-    * Pointer to a variable that is completely dereferenced by the r-value.  If
-    * the r-value is not a dereference or the dereference does not access the
-    * entire variable (i.e., it's just one array element, struct field), \c NULL
-    * is returned.
-    */
-   virtual ir_variable *whole_variable_referenced()
-   {
-      return NULL;
-   }
-
-   /**
-    * Determine if an r-value has the value zero
-    *
-    * The base implementation of this function always returns \c false.  The
-    * \c ir_constant class over-rides this function to return \c true \b only
-    * for vector and scalar types that have all elements set to the value
-    * zero (or \c false for booleans).
-    *
-    * \sa ir_constant::has_value, ir_rvalue::is_one, ir_rvalue::is_negative_one
-    */
-   virtual bool is_zero() const;
-
-   /**
-    * Determine if an r-value has the value one
-    *
-    * The base implementation of this function always returns \c false.  The
-    * \c ir_constant class over-rides this function to return \c true \b only
-    * for vector and scalar types that have all elements set to the value
-    * one (or \c true for booleans).
-    *
-    * \sa ir_constant::has_value, ir_rvalue::is_zero, ir_rvalue::is_negative_one
-    */
-   virtual bool is_one() const;
-
-   /**
-    * Determine if an r-value has the value negative one
-    *
-    * The base implementation of this function always returns \c false.  The
-    * \c ir_constant class over-rides this function to return \c true \b only
-    * for vector and scalar types that have all elements set to the value
-    * negative one.  For boolean times, the result is always \c false.
-    *
-    * \sa ir_constant::has_value, ir_rvalue::is_zero, ir_rvalue::is_one
-    */
-   virtual bool is_negative_one() const;
-
-protected:
-   ir_rvalue();
-};
-
-
-/**
- * Variable storage classes
- */
-enum ir_variable_mode {
-   ir_var_auto = 0,     /**< Function local variables and globals. */
-   ir_var_uniform,      /**< Variable declared as a uniform. */
-   ir_var_in,
-   ir_var_out,
-   ir_var_inout,
-   ir_var_const_in,	/**< "in" param that must be a constant expression */
-   ir_var_system_value, /**< Ex: front-face, instance-id, etc. */
-   ir_var_temporary	/**< Temporary variable generated during compilation. */
-};
-
-enum ir_variable_interpolation {
-   ir_var_smooth = 0,
-   ir_var_flat,
-   ir_var_noperspective
-};
-
-/**
- * \brief Layout qualifiers for gl_FragDepth.
- *
- * The AMD_conservative_depth extension allows gl_FragDepth to be redeclared
- * with a layout qualifier.
- */
-enum ir_depth_layout {
-    ir_depth_layout_none, /**< No depth layout is specified. */
-    ir_depth_layout_any,
-    ir_depth_layout_greater,
-    ir_depth_layout_less,
-    ir_depth_layout_unchanged
-};
-
-/**
- * \brief Convert depth layout qualifier to string.
- */
-const char*
-depth_layout_string(ir_depth_layout layout);
-
-class ir_variable : public ir_instruction {
-public:
-   ir_variable(const struct glsl_type *, const char *, ir_variable_mode);
-
-   virtual ir_variable *clone(void *mem_ctx, struct hash_table *ht) const;
-
-   virtual ir_variable *as_variable()
-   {
-      return this;
-   }
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-
-   /**
-    * Get the string value for the interpolation qualifier
-    *
-    * \return The string that would be used in a shader to specify \c
-    * mode will be returned.
-    *
-    * This function should only be used on a shader input or output variable.
-    */
-   const char *interpolation_string() const;
-
-   /**
-    * Calculate the number of slots required to hold this variable
-    *
-    * This is used to determine how many uniform or varying locations a variable
-    * occupies.  The count is in units of floating point components.
-    */
-   unsigned component_slots() const;
-
-   /**
-    * Delcared name of the variable
-    */
-   const char *name;
-
-   /**
-    * Highest element accessed with a constant expression array index
-    *
-    * Not used for non-array variables.
-    */
-   unsigned max_array_access;
-
-   /**
-    * Is the variable read-only?
-    *
-    * This is set for variables declared as \c const, shader inputs,
-    * and uniforms.
-    */
-   unsigned read_only:1;
-   unsigned centroid:1;
-   unsigned invariant:1;
-
-   /**
-    * Has this variable been used for reading or writing?
-    *
-    * Several GLSL semantic checks require knowledge of whether or not a
-    * variable has been used.  For example, it is an error to redeclare a
-    * variable as invariant after it has been used.
-    */
-   unsigned used:1;
-
-   /**
-    * Storage class of the variable.
-    *
-    * \sa ir_variable_mode
-    */
-   unsigned mode:3;
-
-   /**
-    * Interpolation mode for shader inputs / outputs
-    *
-    * \sa ir_variable_interpolation
-    */
-   unsigned interpolation:2;
-
-   /**
-    * Flag that the whole array is assignable
-    *
-    * In GLSL 1.20 and later whole arrays are assignable (and comparable for
-    * equality).  This flag enables this behavior.
-    */
-   unsigned array_lvalue:1;
-
-   /**
-    * \name ARB_fragment_coord_conventions
-    * @{
-    */
-   unsigned origin_upper_left:1;
-   unsigned pixel_center_integer:1;
-   /*@}*/
-
-   /**
-    * \brief Layout qualifier for gl_FragDepth.
-    *
-    * This is not equal to \c ir_depth_layout_none if and only if this
-    * variable is \c gl_FragDepth and a layout qualifier is specified.
-    */
-   ir_depth_layout depth_layout;
-
-   /**
-    * Was the location explicitly set in the shader?
-    *
-    * If the location is explicitly set in the shader, it \b cannot be changed
-    * by the linker or by the API (e.g., calls to \c glBindAttribLocation have
-    * no effect).
-    */
-   unsigned explicit_location:1;
-
-   /**
-    * Storage location of the base of this variable
-    *
-    * The precise meaning of this field depends on the nature of the variable.
-    *
-    *   - Vertex shader input: one of the values from \c gl_vert_attrib.
-    *   - Vertex shader output: one of the values from \c gl_vert_result.
-    *   - Fragment shader input: one of the values from \c gl_frag_attrib.
-    *   - Fragment shader output: one of the values from \c gl_frag_result.
-    *   - Uniforms: Per-stage uniform slot number.
-    *   - Other: This field is not currently used.
-    *
-    * If the variable is a uniform, shader input, or shader output, and the
-    * slot has not been assigned, the value will be -1.
-    */
-   int location;
-
-   /**
-    * Emit a warning if this variable is accessed.
-    */
-   const char *warn_extension;
-
-   /**
-    * Value assigned in the initializer of a variable declared "const"
-    */
-   ir_constant *constant_value;
-};
-
-
-/*@{*/
-/**
- * The representation of a function instance; may be the full definition or
- * simply a prototype.
- */
-class ir_function_signature : public ir_instruction {
-   /* An ir_function_signature will be part of the list of signatures in
-    * an ir_function.
-    */
-public:
-   ir_function_signature(const glsl_type *return_type);
-
-   virtual ir_function_signature *clone(void *mem_ctx,
-					struct hash_table *ht) const;
-   ir_function_signature *clone_prototype(void *mem_ctx,
-					  struct hash_table *ht) const;
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   /**
-    * Get the name of the function for which this is a signature
-    */
-   const char *function_name() const;
-
-   /**
-    * Get a handle to the function for which this is a signature
-    *
-    * There is no setter function, this function returns a \c const pointer,
-    * and \c ir_function_signature::_function is private for a reason.  The
-    * only way to make a connection between a function and function signature
-    * is via \c ir_function::add_signature.  This helps ensure that certain
-    * invariants (i.e., a function signature is in the list of signatures for
-    * its \c _function) are met.
-    *
-    * \sa ir_function::add_signature
-    */
-   inline const class ir_function *function() const
-   {
-      return this->_function;
-   }
-
-   /**
-    * Check whether the qualifiers match between this signature's parameters
-    * and the supplied parameter list.  If not, returns the name of the first
-    * parameter with mismatched qualifiers (for use in error messages).
-    */
-   const char *qualifiers_match(exec_list *params);
-
-   /**
-    * Replace the current parameter list with the given one.  This is useful
-    * if the current information came from a prototype, and either has invalid
-    * or missing parameter names.
-    */
-   void replace_parameters(exec_list *new_params);
-
-   /**
-    * Function return type.
-    *
-    * \note This discards the optional precision qualifier.
-    */
-   const struct glsl_type *return_type;
-
-   /**
-    * List of ir_variable of function parameters.
-    *
-    * This represents the storage.  The paramaters passed in a particular
-    * call will be in ir_call::actual_paramaters.
-    */
-   struct exec_list parameters;
-
-   /** Whether or not this function has a body (which may be empty). */
-   unsigned is_defined:1;
-
-   /** Whether or not this function signature is a built-in. */
-   unsigned is_builtin:1;
-
-   /** Body of instructions in the function. */
-   struct exec_list body;
-
-private:
-   /** Function of which this signature is one overload. */
-   class ir_function *_function;
-
-   friend class ir_function;
-};
-
-
-/**
- * Header for tracking multiple overloaded functions with the same name.
- * Contains a list of ir_function_signatures representing each of the
- * actual functions.
- */
-class ir_function : public ir_instruction {
-public:
-   ir_function(const char *name);
-
-   virtual ir_function *clone(void *mem_ctx, struct hash_table *ht) const;
-
-   virtual ir_function *as_function()
-   {
-      return this;
-   }
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   void add_signature(ir_function_signature *sig)
-   {
-      sig->_function = this;
-      this->signatures.push_tail(sig);
-   }
-
-   /**
-    * Get an iterator for the set of function signatures
-    */
-   exec_list_iterator iterator()
-   {
-      return signatures.iterator();
-   }
-
-   /**
-    * Find a signature that matches a set of actual parameters, taking implicit
-    * conversions into account.
-    */
-   ir_function_signature *matching_signature(const exec_list *actual_param);
-
-   /**
-    * Find a signature that exactly matches a set of actual parameters without
-    * any implicit type conversions.
-    */
-   ir_function_signature *exact_matching_signature(const exec_list *actual_ps);
-
-   /**
-    * Name of the function.
-    */
-   const char *name;
-
-   /** Whether or not this function has a signature that isn't a built-in. */
-   bool has_user_signature();
-
-   /**
-    * List of ir_function_signature for each overloaded function with this name.
-    */
-   struct exec_list signatures;
-};
-
-inline const char *ir_function_signature::function_name() const
-{
-   return this->_function->name;
-}
-/*@}*/
-
-
-/**
- * IR instruction representing high-level if-statements
- */
-class ir_if : public ir_instruction {
-public:
-   ir_if(ir_rvalue *condition)
-      : condition(condition)
-   {
-      ir_type = ir_type_if;
-   }
-
-   virtual ir_if *clone(void *mem_ctx, struct hash_table *ht) const;
-
-   virtual ir_if *as_if()
-   {
-      return this;
-   }
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   ir_rvalue *condition;
-   /** List of ir_instruction for the body of the then branch */
-   exec_list  then_instructions;
-   /** List of ir_instruction for the body of the else branch */
-   exec_list  else_instructions;
-};
-
-
-/**
- * IR instruction representing a high-level loop structure.
- */
-class ir_loop : public ir_instruction {
-public:
-   ir_loop();
-
-   virtual ir_loop *clone(void *mem_ctx, struct hash_table *ht) const;
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   virtual ir_loop *as_loop()
-   {
-      return this;
-   }
-
-   /**
-    * Get an iterator for the instructions of the loop body
-    */
-   exec_list_iterator iterator()
-   {
-      return body_instructions.iterator();
-   }
-
-   /** List of ir_instruction that make up the body of the loop. */
-   exec_list body_instructions;
-
-   /**
-    * \name Loop counter and controls
-    *
-    * Represents a loop like a FORTRAN \c do-loop.
-    *
-    * \note
-    * If \c from and \c to are the same value, the loop will execute once.
-    */
-   /*@{*/
-   ir_rvalue *from;             /** Value of the loop counter on the first
-				 * iteration of the loop.
-				 */
-   ir_rvalue *to;               /** Value of the loop counter on the last
-				 * iteration of the loop.
-				 */
-   ir_rvalue *increment;
-   ir_variable *counter;
-
-   /**
-    * Comparison operation in the loop terminator.
-    *
-    * If any of the loop control fields are non-\c NULL, this field must be
-    * one of \c ir_binop_less, \c ir_binop_greater, \c ir_binop_lequal,
-    * \c ir_binop_gequal, \c ir_binop_equal, or \c ir_binop_nequal.
-    */
-   int cmp;
-   /*@}*/
-};
-
-
-class ir_assignment : public ir_instruction {
-public:
-   ir_assignment(ir_rvalue *lhs, ir_rvalue *rhs, ir_rvalue *condition);
-
-   /**
-    * Construct an assignment with an explicit write mask
-    *
-    * \note
-    * Since a write mask is supplied, the LHS must already be a bare
-    * \c ir_dereference.  The cannot be any swizzles in the LHS.
-    */
-   ir_assignment(ir_dereference *lhs, ir_rvalue *rhs, ir_rvalue *condition,
-		 unsigned write_mask);
-
-   virtual ir_assignment *clone(void *mem_ctx, struct hash_table *ht) const;
-
-   virtual ir_constant *constant_expression_value();
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   virtual ir_assignment * as_assignment()
-   {
-      return this;
-   }
-
-   /**
-    * Get a whole variable written by an assignment
-    *
-    * If the LHS of the assignment writes a whole variable, the variable is
-    * returned.  Otherwise \c NULL is returned.  Examples of whole-variable
-    * assignment are:
-    *
-    *  - Assigning to a scalar
-    *  - Assigning to all components of a vector
-    *  - Whole array (or matrix) assignment
-    *  - Whole structure assignment
-    */
-   ir_variable *whole_variable_written();
-
-   /**
-    * Set the LHS of an assignment
-    */
-   void set_lhs(ir_rvalue *lhs);
-
-   /**
-    * Left-hand side of the assignment.
-    *
-    * This should be treated as read only.  If you need to set the LHS of an
-    * assignment, use \c ir_assignment::set_lhs.
-    */
-   ir_dereference *lhs;
-
-   /**
-    * Value being assigned
-    */
-   ir_rvalue *rhs;
-
-   /**
-    * Optional condition for the assignment.
-    */
-   ir_rvalue *condition;
-
-
-   /**
-    * Component mask written
-    *
-    * For non-vector types in the LHS, this field will be zero.  For vector
-    * types, a bit will be set for each component that is written.  Note that
-    * for \c vec2 and \c vec3 types only the lower bits will ever be set.
-    *
-    * A partially-set write mask means that each enabled channel gets
-    * the value from a consecutive channel of the rhs.  For example,
-    * to write just .xyw of gl_FrontColor with color:
-    *
-    * (assign (constant bool (1)) (xyw)
-    *     (var_ref gl_FragColor)
-    *     (swiz xyw (var_ref color)))
-    */
-   unsigned write_mask:4;
-};
-
-/* Update ir_expression::num_operands() and operator_strs when
- * updating this list.
- */
-enum ir_expression_operation {
-   ir_unop_bit_not,
-   ir_unop_logic_not,
-   ir_unop_neg,
-   ir_unop_abs,
-   ir_unop_sign,
-   ir_unop_rcp,
-   ir_unop_rsq,
-   ir_unop_sqrt,
-   ir_unop_exp,      /**< Log base e on gentype */
-   ir_unop_log,	     /**< Natural log on gentype */
-   ir_unop_exp2,
-   ir_unop_log2,
-   ir_unop_f2i,      /**< Float-to-integer conversion. */
-   ir_unop_i2f,      /**< Integer-to-float conversion. */
-   ir_unop_f2b,      /**< Float-to-boolean conversion */
-   ir_unop_b2f,      /**< Boolean-to-float conversion */
-   ir_unop_i2b,      /**< int-to-boolean conversion */
-   ir_unop_b2i,      /**< Boolean-to-int conversion */
-   ir_unop_u2f,      /**< Unsigned-to-float conversion. */
-   ir_unop_any,
-
-   /**
-    * \name Unary floating-point rounding operations.
-    */
-   /*@{*/
-   ir_unop_trunc,
-   ir_unop_ceil,
-   ir_unop_floor,
-   ir_unop_fract,
-   ir_unop_round_even,
-   /*@}*/
-
-   /**
-    * \name Trigonometric operations.
-    */
-   /*@{*/
-   ir_unop_sin,
-   ir_unop_cos,
-   ir_unop_sin_reduced,    /**< Reduced range sin. [-pi, pi] */
-   ir_unop_cos_reduced,    /**< Reduced range cos. [-pi, pi] */
-   /*@}*/
-
-   /**
-    * \name Partial derivatives.
-    */
-   /*@{*/
-   ir_unop_dFdx,
-   ir_unop_dFdy,
-   /*@}*/
-
-   ir_unop_noise,
-
-   /**
-    * A sentinel marking the last of the unary operations.
-    */
-   ir_last_unop = ir_unop_noise,
-
-   ir_binop_add,
-   ir_binop_sub,
-   ir_binop_mul,
-   ir_binop_div,
-
-   /**
-    * Takes one of two combinations of arguments:
-    *
-    * - mod(vecN, vecN)
-    * - mod(vecN, float)
-    *
-    * Does not take integer types.
-    */
-   ir_binop_mod,
-
-   /**
-    * \name Binary comparison operators which return a boolean vector.
-    * The type of both operands must be equal.
-    */
-   /*@{*/
-   ir_binop_less,
-   ir_binop_greater,
-   ir_binop_lequal,
-   ir_binop_gequal,
-   ir_binop_equal,
-   ir_binop_nequal,
-   /**
-    * Returns single boolean for whether all components of operands[0]
-    * equal the components of operands[1].
-    */
-   ir_binop_all_equal,
-   /**
-    * Returns single boolean for whether any component of operands[0]
-    * is not equal to the corresponding component of operands[1].
-    */
-   ir_binop_any_nequal,
-   /*@}*/
-
-   /**
-    * \name Bit-wise binary operations.
-    */
-   /*@{*/
-   ir_binop_lshift,
-   ir_binop_rshift,
-   ir_binop_bit_and,
-   ir_binop_bit_xor,
-   ir_binop_bit_or,
-   /*@}*/
-
-   ir_binop_logic_and,
-   ir_binop_logic_xor,
-   ir_binop_logic_or,
-
-   ir_binop_dot,
-   ir_binop_min,
-   ir_binop_max,
-
-   ir_binop_pow,
-
-   /**
-    * A sentinel marking the last of the binary operations.
-    */
-   ir_last_binop = ir_binop_pow,
-
-   ir_quadop_vector,
-
-   /**
-    * A sentinel marking the last of all operations.
-    */
-   ir_last_opcode = ir_last_binop
-};
-
-class ir_expression : public ir_rvalue {
-public:
-   /**
-    * Constructor for unary operation expressions
-    */
-   ir_expression(int op, const struct glsl_type *type, ir_rvalue *);
-   ir_expression(int op, ir_rvalue *);
-
-   /**
-    * Constructor for binary operation expressions
-    */
-   ir_expression(int op, const struct glsl_type *type,
-		 ir_rvalue *, ir_rvalue *);
-   ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1);
-
-   /**
-    * Constructor for quad operator expressions
-    */
-   ir_expression(int op, const struct glsl_type *type,
-		 ir_rvalue *, ir_rvalue *, ir_rvalue *, ir_rvalue *);
-
-   virtual ir_expression *as_expression()
-   {
-      return this;
-   }
-
-   virtual ir_expression *clone(void *mem_ctx, struct hash_table *ht) const;
-
-   /**
-    * Attempt to constant-fold the expression
-    *
-    * If the expression cannot be constant folded, this method will return
-    * \c NULL.
-    */
-   virtual ir_constant *constant_expression_value();
-
-   /**
-    * Determine the number of operands used by an expression
-    */
-   static unsigned int get_num_operands(ir_expression_operation);
-
-   /**
-    * Determine the number of operands used by an expression
-    */
-   unsigned int get_num_operands() const
-   {
-      return (this->operation == ir_quadop_vector)
-	 ? this->type->vector_elements : get_num_operands(operation);
-   }
-
-   /**
-    * Return a string representing this expression's operator.
-    */
-   const char *operator_string();
-
-   /**
-    * Return a string representing this expression's operator.
-    */
-   static const char *operator_string(ir_expression_operation);
-
-
-   /**
-    * Do a reverse-lookup to translate the given string into an operator.
-    */
-   static ir_expression_operation get_operator(const char *);
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   ir_expression_operation operation;
-   ir_rvalue *operands[4];
-};
-
-
-/**
- * IR instruction representing a function call
- */
-class ir_call : public ir_rvalue {
-public:
-   ir_call(ir_function_signature *callee, exec_list *actual_parameters)
-      : callee(callee)
-   {
-      ir_type = ir_type_call;
-      assert(callee->return_type != NULL);
-      type = callee->return_type;
-      actual_parameters->move_nodes_to(& this->actual_parameters);
-   }
-
-   virtual ir_call *clone(void *mem_ctx, struct hash_table *ht) const;
-
-   virtual ir_constant *constant_expression_value();
-
-   virtual ir_call *as_call()
-   {
-      return this;
-   }
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   /**
-    * Get a generic ir_call object when an error occurs
-    *
-    * Any allocation will be performed with 'ctx' as ralloc owner.
-    */
-   static ir_call *get_error_instruction(void *ctx);
-
-   /**
-    * Get an iterator for the set of acutal parameters
-    */
-   exec_list_iterator iterator()
-   {
-      return actual_parameters.iterator();
-   }
-
-   /**
-    * Get the name of the function being called.
-    */
-   const char *callee_name() const
-   {
-      return callee->function_name();
-   }
-
-   /**
-    * Get the function signature bound to this function call
-    */
-   ir_function_signature *get_callee()
-   {
-      return callee;
-   }
-
-   /**
-    * Set the function call target
-    */
-   void set_callee(ir_function_signature *sig);
-
-   /**
-    * Generates an inline version of the function before @ir,
-    * returning the return value of the function.
-    */
-   ir_rvalue *generate_inline(ir_instruction *ir);
-
-   /* List of ir_rvalue of paramaters passed in this call. */
-   exec_list actual_parameters;
-
-private:
-   ir_call()
-      : callee(NULL)
-   {
-      this->ir_type = ir_type_call;
-   }
-
-   ir_function_signature *callee;
-};
-
-
-/**
- * \name Jump-like IR instructions.
- *
- * These include \c break, \c continue, \c return, and \c discard.
- */
-/*@{*/
-class ir_jump : public ir_instruction {
-protected:
-   ir_jump()
-   {
-      ir_type = ir_type_unset;
-   }
-};
-
-class ir_return : public ir_jump {
-public:
-   ir_return()
-      : value(NULL)
-   {
-      this->ir_type = ir_type_return;
-   }
-
-   ir_return(ir_rvalue *value)
-      : value(value)
-   {
-      this->ir_type = ir_type_return;
-   }
-
-   virtual ir_return *clone(void *mem_ctx, struct hash_table *) const;
-
-   virtual ir_return *as_return()
-   {
-      return this;
-   }
-
-   ir_rvalue *get_value() const
-   {
-      return value;
-   }
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   ir_rvalue *value;
-};
-
-
-/**
- * Jump instructions used inside loops
- *
- * These include \c break and \c continue.  The \c break within a loop is
- * different from the \c break within a switch-statement.
- *
- * \sa ir_switch_jump
- */
-class ir_loop_jump : public ir_jump {
-public:
-   enum jump_mode {
-      jump_break,
-      jump_continue
-   };
-
-   ir_loop_jump(jump_mode mode)
-   {
-      this->ir_type = ir_type_loop_jump;
-      this->mode = mode;
-      this->loop = loop;
-   }
-
-   virtual ir_loop_jump *clone(void *mem_ctx, struct hash_table *) const;
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   bool is_break() const
-   {
-      return mode == jump_break;
-   }
-
-   bool is_continue() const
-   {
-      return mode == jump_continue;
-   }
-
-   /** Mode selector for the jump instruction. */
-   enum jump_mode mode;
-private:
-   /** Loop containing this break instruction. */
-   ir_loop *loop;
-};
-
-/**
- * IR instruction representing discard statements.
- */
-class ir_discard : public ir_jump {
-public:
-   ir_discard()
-   {
-      this->ir_type = ir_type_discard;
-      this->condition = NULL;
-   }
-
-   ir_discard(ir_rvalue *cond)
-   {
-      this->ir_type = ir_type_discard;
-      this->condition = cond;
-   }
-
-   virtual ir_discard *clone(void *mem_ctx, struct hash_table *ht) const;
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   virtual ir_discard *as_discard()
-   {
-      return this;
-   }
-
-   ir_rvalue *condition;
-};
-/*@}*/
-
-
-/**
- * Texture sampling opcodes used in ir_texture
- */
-enum ir_texture_opcode {
-   ir_tex,		/**< Regular texture look-up */
-   ir_txb,		/**< Texture look-up with LOD bias */
-   ir_txl,		/**< Texture look-up with explicit LOD */
-   ir_txd,		/**< Texture look-up with partial derivatvies */
-   ir_txf		/**< Texel fetch with explicit LOD */
-};
-
-
-/**
- * IR instruction to sample a texture
- *
- * The specific form of the IR instruction depends on the \c mode value
- * selected from \c ir_texture_opcodes.  In the printed IR, these will
- * appear as:
- *
- *                             Texel offset (0 or an expression)
- *                             | Projection divisor
- *                             | |  Shadow comparitor
- *                             | |  |
- *                             v v  v
- * (tex <sampler> <coordinate> 0 1 ( ))
- * (txb <sampler> <coordinate> 0 1 ( ) <bias>)
- * (txl <sampler> <coordinate> 0 1 ( ) <lod>)
- * (txd <sampler> <coordinate> 0 1 ( ) (dPdx dPdy))
- * (txf <sampler> <coordinate> 0       <lod>)
- */
-class ir_texture : public ir_rvalue {
-public:
-   ir_texture(enum ir_texture_opcode op)
-      : op(op), projector(NULL), shadow_comparitor(NULL), offset(NULL)
-   {
-      this->ir_type = ir_type_texture;
-   }
-
-   virtual ir_texture *clone(void *mem_ctx, struct hash_table *) const;
-
-   virtual ir_constant *constant_expression_value();
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   /**
-    * Return a string representing the ir_texture_opcode.
-    */
-   const char *opcode_string();
-
-   /** Set the sampler and infer the type. */
-   void set_sampler(ir_dereference *sampler);
-
-   /**
-    * Do a reverse-lookup to translate a string into an ir_texture_opcode.
-    */
-   static ir_texture_opcode get_opcode(const char *);
-
-   enum ir_texture_opcode op;
-
-   /** Sampler to use for the texture access. */
-   ir_dereference *sampler;
-
-   /** Texture coordinate to sample */
-   ir_rvalue *coordinate;
-
-   /**
-    * Value used for projective divide.
-    *
-    * If there is no projective divide (the common case), this will be
-    * \c NULL.  Optimization passes should check for this to point to a constant
-    * of 1.0 and replace that with \c NULL.
-    */
-   ir_rvalue *projector;
-
-   /**
-    * Coordinate used for comparison on shadow look-ups.
-    *
-    * If there is no shadow comparison, this will be \c NULL.  For the
-    * \c ir_txf opcode, this *must* be \c NULL.
-    */
-   ir_rvalue *shadow_comparitor;
-
-   /** Texel offset. */
-   ir_rvalue *offset;
-
-   union {
-      ir_rvalue *lod;		/**< Floating point LOD */
-      ir_rvalue *bias;		/**< Floating point LOD bias */
-      struct {
-	 ir_rvalue *dPdx;	/**< Partial derivative of coordinate wrt X */
-	 ir_rvalue *dPdy;	/**< Partial derivative of coordinate wrt Y */
-      } grad;
-   } lod_info;
-};
-
-
-struct ir_swizzle_mask {
-   unsigned x:2;
-   unsigned y:2;
-   unsigned z:2;
-   unsigned w:2;
-
-   /**
-    * Number of components in the swizzle.
-    */
-   unsigned num_components:3;
-
-   /**
-    * Does the swizzle contain duplicate components?
-    *
-    * L-value swizzles cannot contain duplicate components.
-    */
-   unsigned has_duplicates:1;
-};
-
-
-class ir_swizzle : public ir_rvalue {
-public:
-   ir_swizzle(ir_rvalue *, unsigned x, unsigned y, unsigned z, unsigned w,
-              unsigned count);
-
-   ir_swizzle(ir_rvalue *val, const unsigned *components, unsigned count);
-
-   ir_swizzle(ir_rvalue *val, ir_swizzle_mask mask);
-
-   virtual ir_swizzle *clone(void *mem_ctx, struct hash_table *) const;
-
-   virtual ir_constant *constant_expression_value();
-
-   virtual ir_swizzle *as_swizzle()
-   {
-      return this;
-   }
-
-   /**
-    * Construct an ir_swizzle from the textual representation.  Can fail.
-    */
-   static ir_swizzle *create(ir_rvalue *, const char *, unsigned vector_length);
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   bool is_lvalue()
-   {
-      return val->is_lvalue() && !mask.has_duplicates;
-   }
-
-   /**
-    * Get the variable that is ultimately referenced by an r-value
-    */
-   virtual ir_variable *variable_referenced();
-
-   ir_rvalue *val;
-   ir_swizzle_mask mask;
-
-private:
-   /**
-    * Initialize the mask component of a swizzle
-    *
-    * This is used by the \c ir_swizzle constructors.
-    */
-   void init_mask(const unsigned *components, unsigned count);
-};
-
-
-class ir_dereference : public ir_rvalue {
-public:
-   virtual ir_dereference *clone(void *mem_ctx, struct hash_table *) const = 0;
-
-   virtual ir_dereference *as_dereference()
-   {
-      return this;
-   }
-
-   bool is_lvalue();
-
-   /**
-    * Get the variable that is ultimately referenced by an r-value
-    */
-   virtual ir_variable *variable_referenced() = 0;
-};
-
-
-class ir_dereference_variable : public ir_dereference {
-public:
-   ir_dereference_variable(ir_variable *var);
-
-   virtual ir_dereference_variable *clone(void *mem_ctx,
-					  struct hash_table *) const;
-
-   virtual ir_constant *constant_expression_value();
-
-   virtual ir_dereference_variable *as_dereference_variable()
-   {
-      return this;
-   }
-
-   /**
-    * Get the variable that is ultimately referenced by an r-value
-    */
-   virtual ir_variable *variable_referenced()
-   {
-      return this->var;
-   }
-
-   virtual ir_variable *whole_variable_referenced()
-   {
-      /* ir_dereference_variable objects always dereference the entire
-       * variable.  However, if this dereference is dereferenced by anything
-       * else, the complete deferefernce chain is not a whole-variable
-       * dereference.  This method should only be called on the top most
-       * ir_rvalue in a dereference chain.
-       */
-      return this->var;
-   }
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   /**
-    * Object being dereferenced.
-    */
-   ir_variable *var;
-};
-
-
-class ir_dereference_array : public ir_dereference {
-public:
-   ir_dereference_array(ir_rvalue *value, ir_rvalue *array_index);
-
-   ir_dereference_array(ir_variable *var, ir_rvalue *array_index);
-
-   virtual ir_dereference_array *clone(void *mem_ctx,
-				       struct hash_table *) const;
-
-   virtual ir_constant *constant_expression_value();
-
-   virtual ir_dereference_array *as_dereference_array()
-   {
-      return this;
-   }
-
-   /**
-    * Get the variable that is ultimately referenced by an r-value
-    */
-   virtual ir_variable *variable_referenced()
-   {
-      return this->array->variable_referenced();
-   }
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   ir_rvalue *array;
-   ir_rvalue *array_index;
-
-private:
-   void set_array(ir_rvalue *value);
-};
-
-
-class ir_dereference_record : public ir_dereference {
-public:
-   ir_dereference_record(ir_rvalue *value, const char *field);
-
-   ir_dereference_record(ir_variable *var, const char *field);
-
-   virtual ir_dereference_record *clone(void *mem_ctx,
-					struct hash_table *) const;
-
-   virtual ir_constant *constant_expression_value();
-
-   /**
-    * Get the variable that is ultimately referenced by an r-value
-    */
-   virtual ir_variable *variable_referenced()
-   {
-      return this->record->variable_referenced();
-   }
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   ir_rvalue *record;
-   const char *field;
-};
-
-
-/**
- * Data stored in an ir_constant
- */
-union ir_constant_data {
-      unsigned u[16];
-      int i[16];
-      float f[16];
-      bool b[16];
-};
-
-
-class ir_constant : public ir_rvalue {
-public:
-   ir_constant(const struct glsl_type *type, const ir_constant_data *data);
-   ir_constant(bool b);
-   ir_constant(unsigned int u);
-   ir_constant(int i);
-   ir_constant(float f);
-
-   /**
-    * Construct an ir_constant from a list of ir_constant values
-    */
-   ir_constant(const struct glsl_type *type, exec_list *values);
-
-   /**
-    * Construct an ir_constant from a scalar component of another ir_constant
-    *
-    * The new \c ir_constant inherits the type of the component from the
-    * source constant.
-    *
-    * \note
-    * In the case of a matrix constant, the new constant is a scalar, \b not
-    * a vector.
-    */
-   ir_constant(const ir_constant *c, unsigned i);
-
-   /**
-    * Return a new ir_constant of the specified type containing all zeros.
-    */
-   static ir_constant *zero(void *mem_ctx, const glsl_type *type);
-
-   virtual ir_constant *clone(void *mem_ctx, struct hash_table *) const;
-
-   virtual ir_constant *constant_expression_value();
-
-   virtual ir_constant *as_constant()
-   {
-      return this;
-   }
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   /**
-    * Get a particular component of a constant as a specific type
-    *
-    * This is useful, for example, to get a value from an integer constant
-    * as a float or bool.  This appears frequently when constructors are
-    * called with all constant parameters.
-    */
-   /*@{*/
-   bool get_bool_component(unsigned i) const;
-   float get_float_component(unsigned i) const;
-   int get_int_component(unsigned i) const;
-   unsigned get_uint_component(unsigned i) const;
-   /*@}*/
-
-   ir_constant *get_array_element(unsigned i) const;
-
-   ir_constant *get_record_field(const char *name);
-
-   /**
-    * Determine whether a constant has the same value as another constant
-    *
-    * \sa ir_constant::is_zero, ir_constant::is_one,
-    * ir_constant::is_negative_one
-    */
-   bool has_value(const ir_constant *) const;
-
-   virtual bool is_zero() const;
-   virtual bool is_one() const;
-   virtual bool is_negative_one() const;
-
-   /**
-    * Value of the constant.
-    *
-    * The field used to back the values supplied by the constant is determined
-    * by the type associated with the \c ir_instruction.  Constants may be
-    * scalars, vectors, or matrices.
-    */
-   union ir_constant_data value;
-
-   /* Array elements */
-   ir_constant **array_elements;
-
-   /* Structure fields */
-   exec_list components;
-
-private:
-   /**
-    * Parameterless constructor only used by the clone method
-    */
-   ir_constant(void);
-};
-
-/*@}*/
-
-/**
- * Apply a visitor to each IR node in a list
- */
-void
-visit_exec_list(exec_list *list, ir_visitor *visitor);
-
-/**
- * Validate invariants on each IR node in a list
- */
-void validate_ir_tree(exec_list *instructions);
-
-/**
- * Make a clone of each IR instruction in a list
- *
- * \param in   List of IR instructions that are to be cloned
- * \param out  List to hold the cloned instructions
- */
-void
-clone_ir_list(void *mem_ctx, exec_list *out, const exec_list *in);
-
-extern void
-_mesa_glsl_initialize_variables(exec_list *instructions,
-				struct _mesa_glsl_parse_state *state);
-
-extern void
-_mesa_glsl_initialize_functions(_mesa_glsl_parse_state *state);
-
-extern void
-_mesa_glsl_release_functions(void);
-
-extern void
-reparent_ir(exec_list *list, void *mem_ctx);
-
-struct glsl_symbol_table;
-
-extern void
-import_prototypes(const exec_list *source, exec_list *dest,
-		  struct glsl_symbol_table *symbols, void *mem_ctx);
-
-extern bool
-ir_has_call(ir_instruction *ir);
-
-extern void
-do_set_program_inouts(exec_list *instructions, struct gl_program *prog);
-
-#endif /* IR_H */
+/* -*- c++ -*- */

+/*

+ * Copyright © 2010 Intel Corporation

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the "Software"),

+ * to deal in the Software without restriction, including without limitation

+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,

+ * and/or sell copies of the Software, and to permit persons to whom the

+ * Software is furnished to do so, subject to the following conditions:

+ *

+ * The above copyright notice and this permission notice (including the next

+ * paragraph) shall be included in all copies or substantial portions of the

+ * Software.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

+ * DEALINGS IN THE SOFTWARE.

+ */

+

+#pragma once

+#ifndef IR_H

+#define IR_H

+

+#include <stdio.h>

+#include <stdlib.h>

+

+#include "ralloc.h"

+#include "glsl_types.h"

+#include "list.h"

+#include "ir_visitor.h"

+#include "ir_hierarchical_visitor.h"

+

+/**

+ * \defgroup IR Intermediate representation nodes

+ *

+ * @{

+ */

+

+/**

+ * Class tags

+ *

+ * Each concrete class derived from \c ir_instruction has a value in this

+ * enumerant.  The value for the type is stored in \c ir_instruction::ir_type

+ * by the constructor.  While using type tags is not very C++, it is extremely

+ * convenient.  For example, during debugging you can simply inspect

+ * \c ir_instruction::ir_type to find out the actual type of the object.

+ *

+ * In addition, it is possible to use a switch-statement based on \c

+ * \c ir_instruction::ir_type to select different behavior for different object

+ * types.  For functions that have only slight differences for several object

+ * types, this allows writing very straightforward, readable code.

+ */

+enum ir_node_type {

+   /**

+    * Zero is unused so that the IR validator can detect cases where

+    * \c ir_instruction::ir_type has not been initialized.

+    */

+   ir_type_unset,

+   ir_type_variable,

+   ir_type_assignment,

+   ir_type_call,

+   ir_type_constant,

+   ir_type_dereference_array,

+   ir_type_dereference_record,

+   ir_type_dereference_variable,

+   ir_type_discard,

+   ir_type_expression,

+   ir_type_function,

+   ir_type_function_signature,

+   ir_type_if,

+   ir_type_loop,

+   ir_type_loop_jump,

+   ir_type_return,

+   ir_type_swizzle,

+   ir_type_texture,

+   ir_type_max /**< maximum ir_type enum number, for validation */

+};

+

+/**

+ * Base class of all IR instructions

+ */

+class ir_instruction : public exec_node {

+public:

+   enum ir_node_type ir_type;

+   const struct glsl_type *type;

+

+   /** ir_print_visitor helper for debugging. */

+   void print(void) const;

+

+   virtual void accept(ir_visitor *) = 0;

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *) = 0;

+   virtual ir_instruction *clone(void *mem_ctx,

+				 struct hash_table *ht) const = 0;

+

+   /**

+    * \name IR instruction downcast functions

+    *

+    * These functions either cast the object to a derived class or return

+    * \c NULL if the object's type does not match the specified derived class.

+    * Additional downcast functions will be added as needed.

+    */

+   /*@{*/

+   virtual class ir_variable *          as_variable()         { return NULL; }

+   virtual class ir_function *          as_function()         { return NULL; }

+   virtual class ir_dereference *       as_dereference()      { return NULL; }

+   virtual class ir_dereference_array *	as_dereference_array() { return NULL; }

+   virtual class ir_dereference_variable *as_dereference_variable() { return NULL; }

+   virtual class ir_expression *        as_expression()       { return NULL; }

+   virtual class ir_rvalue *            as_rvalue()           { return NULL; }

+   virtual class ir_loop *              as_loop()             { return NULL; }

+   virtual class ir_assignment *        as_assignment()       { return NULL; }

+   virtual class ir_call *              as_call()             { return NULL; }

+   virtual class ir_return *            as_return()           { return NULL; }

+   virtual class ir_if *                as_if()               { return NULL; }

+   virtual class ir_swizzle *           as_swizzle()          { return NULL; }

+   virtual class ir_constant *          as_constant()         { return NULL; }

+   virtual class ir_discard *           as_discard()          { return NULL; }

+   /*@}*/

+

+protected:

+   ir_instruction()

+   {

+      ir_type = ir_type_unset;

+      type = NULL;

+   }

+};

+

+

+class ir_rvalue : public ir_instruction {

+public:

+   virtual ir_rvalue *clone(void *mem_ctx, struct hash_table *) const = 0;

+

+   virtual ir_constant *constant_expression_value() = 0;

+

+   virtual ir_rvalue * as_rvalue()

+   {

+      return this;

+   }

+

+   ir_rvalue *as_rvalue_to_saturate();

+

+   virtual bool is_lvalue()

+   {

+      return false;

+   }

+

+   /**

+    * Get the variable that is ultimately referenced by an r-value

+    */

+   virtual ir_variable *variable_referenced()

+   {

+      return NULL;

+   }

+

+

+   /**

+    * If an r-value is a reference to a whole variable, get that variable

+    *

+    * \return

+    * Pointer to a variable that is completely dereferenced by the r-value.  If

+    * the r-value is not a dereference or the dereference does not access the

+    * entire variable (i.e., it's just one array element, struct field), \c NULL

+    * is returned.

+    */

+   virtual ir_variable *whole_variable_referenced()

+   {

+      return NULL;

+   }

+

+   /**

+    * Determine if an r-value has the value zero

+    *

+    * The base implementation of this function always returns \c false.  The

+    * \c ir_constant class over-rides this function to return \c true \b only

+    * for vector and scalar types that have all elements set to the value

+    * zero (or \c false for booleans).

+    *

+    * \sa ir_constant::has_value, ir_rvalue::is_one, ir_rvalue::is_negative_one

+    */

+   virtual bool is_zero() const;

+

+   /**

+    * Determine if an r-value has the value one

+    *

+    * The base implementation of this function always returns \c false.  The

+    * \c ir_constant class over-rides this function to return \c true \b only

+    * for vector and scalar types that have all elements set to the value

+    * one (or \c true for booleans).

+    *

+    * \sa ir_constant::has_value, ir_rvalue::is_zero, ir_rvalue::is_negative_one

+    */

+   virtual bool is_one() const;

+

+   /**

+    * Determine if an r-value has the value negative one

+    *

+    * The base implementation of this function always returns \c false.  The

+    * \c ir_constant class over-rides this function to return \c true \b only

+    * for vector and scalar types that have all elements set to the value

+    * negative one.  For boolean times, the result is always \c false.

+    *

+    * \sa ir_constant::has_value, ir_rvalue::is_zero, ir_rvalue::is_one

+    */

+   virtual bool is_negative_one() const;

+

+protected:

+   ir_rvalue();

+};

+

+

+/**

+ * Variable storage classes

+ */

+enum ir_variable_mode {

+   ir_var_auto = 0,     /**< Function local variables and globals. */

+   ir_var_uniform,      /**< Variable declared as a uniform. */

+   ir_var_in,

+   ir_var_out,

+   ir_var_inout,

+   ir_var_const_in,	/**< "in" param that must be a constant expression */

+   ir_var_system_value, /**< Ex: front-face, instance-id, etc. */

+   ir_var_temporary	/**< Temporary variable generated during compilation. */

+};

+

+enum ir_variable_interpolation {

+   ir_var_smooth = 0,

+   ir_var_flat,

+   ir_var_noperspective

+};

+

+/**

+ * \brief Layout qualifiers for gl_FragDepth.

+ *

+ * The AMD_conservative_depth extension allows gl_FragDepth to be redeclared

+ * with a layout qualifier.

+ */

+enum ir_depth_layout {

+    ir_depth_layout_none, /**< No depth layout is specified. */

+    ir_depth_layout_any,

+    ir_depth_layout_greater,

+    ir_depth_layout_less,

+    ir_depth_layout_unchanged

+};

+

+/**

+ * \brief Convert depth layout qualifier to string.

+ */

+const char*

+depth_layout_string(ir_depth_layout layout);

+

+class ir_variable : public ir_instruction {

+public:

+   ir_variable(const struct glsl_type *, const char *, ir_variable_mode);

+

+   virtual ir_variable *clone(void *mem_ctx, struct hash_table *ht) const;

+

+   virtual ir_variable *as_variable()

+   {

+      return this;

+   }

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+

+   /**

+    * Get the string value for the interpolation qualifier

+    *

+    * \return The string that would be used in a shader to specify \c

+    * mode will be returned.

+    *

+    * This function should only be used on a shader input or output variable.

+    */

+   const char *interpolation_string() const;

+

+   /**

+    * Calculate the number of slots required to hold this variable

+    *

+    * This is used to determine how many uniform or varying locations a variable

+    * occupies.  The count is in units of floating point components.

+    */

+   unsigned component_slots() const;

+

+   /**

+    * Delcared name of the variable

+    */

+   const char *name;

+

+   /**

+    * Highest element accessed with a constant expression array index

+    *

+    * Not used for non-array variables.

+    */

+   unsigned max_array_access;

+

+   /**

+    * Is the variable read-only?

+    *

+    * This is set for variables declared as \c const, shader inputs,

+    * and uniforms.

+    */

+   unsigned read_only:1;

+   unsigned centroid:1;

+   unsigned invariant:1;

+

+   /**

+    * Has this variable been used for reading or writing?

+    *

+    * Several GLSL semantic checks require knowledge of whether or not a

+    * variable has been used.  For example, it is an error to redeclare a

+    * variable as invariant after it has been used.

+    */

+   unsigned used:1;

+

+   /**

+    * Storage class of the variable.

+    *

+    * \sa ir_variable_mode

+    */

+   unsigned mode:3;

+

+   /**

+    * Interpolation mode for shader inputs / outputs

+    *

+    * \sa ir_variable_interpolation

+    */

+   unsigned interpolation:2;

+

+   /**

+    * Flag that the whole array is assignable

+    *

+    * In GLSL 1.20 and later whole arrays are assignable (and comparable for

+    * equality).  This flag enables this behavior.

+    */

+   unsigned array_lvalue:1;

+

+   /**

+    * \name ARB_fragment_coord_conventions

+    * @{

+    */

+   unsigned origin_upper_left:1;

+   unsigned pixel_center_integer:1;

+   /*@}*/

+

+   /**

+    * \brief Layout qualifier for gl_FragDepth.

+    *

+    * This is not equal to \c ir_depth_layout_none if and only if this

+    * variable is \c gl_FragDepth and a layout qualifier is specified.

+    */

+   ir_depth_layout depth_layout;

+

+   /**

+    * Was the location explicitly set in the shader?

+    *

+    * If the location is explicitly set in the shader, it \b cannot be changed

+    * by the linker or by the API (e.g., calls to \c glBindAttribLocation have

+    * no effect).

+    */

+   unsigned explicit_location:1;

+

+   /**

+    * Storage location of the base of this variable

+    *

+    * The precise meaning of this field depends on the nature of the variable.

+    *

+    *   - Vertex shader input: one of the values from \c gl_vert_attrib.

+    *   - Vertex shader output: one of the values from \c gl_vert_result.

+    *   - Fragment shader input: one of the values from \c gl_frag_attrib.

+    *   - Fragment shader output: one of the values from \c gl_frag_result.

+    *   - Uniforms: Per-stage uniform slot number.

+    *   - Other: This field is not currently used.

+    *

+    * If the variable is a uniform, shader input, or shader output, and the

+    * slot has not been assigned, the value will be -1.

+    */

+   int location;

+

+   /**

+    * Emit a warning if this variable is accessed.

+    */

+   const char *warn_extension;

+

+   /**

+    * Value assigned in the initializer of a variable declared "const"

+    */

+   ir_constant *constant_value;

+};

+

+

+/*@{*/

+/**

+ * The representation of a function instance; may be the full definition or

+ * simply a prototype.

+ */

+class ir_function_signature : public ir_instruction {

+   /* An ir_function_signature will be part of the list of signatures in

+    * an ir_function.

+    */

+public:

+   ir_function_signature(const glsl_type *return_type);

+

+   virtual ir_function_signature *clone(void *mem_ctx,

+					struct hash_table *ht) const;

+   ir_function_signature *clone_prototype(void *mem_ctx,

+					  struct hash_table *ht) const;

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   /**

+    * Get the name of the function for which this is a signature

+    */

+   const char *function_name() const;

+

+   /**

+    * Get a handle to the function for which this is a signature

+    *

+    * There is no setter function, this function returns a \c const pointer,

+    * and \c ir_function_signature::_function is private for a reason.  The

+    * only way to make a connection between a function and function signature

+    * is via \c ir_function::add_signature.  This helps ensure that certain

+    * invariants (i.e., a function signature is in the list of signatures for

+    * its \c _function) are met.

+    *

+    * \sa ir_function::add_signature

+    */

+   inline const class ir_function *function() const

+   {

+      return this->_function;

+   }

+

+   /**

+    * Check whether the qualifiers match between this signature's parameters

+    * and the supplied parameter list.  If not, returns the name of the first

+    * parameter with mismatched qualifiers (for use in error messages).

+    */

+   const char *qualifiers_match(exec_list *params);

+

+   /**

+    * Replace the current parameter list with the given one.  This is useful

+    * if the current information came from a prototype, and either has invalid

+    * or missing parameter names.

+    */

+   void replace_parameters(exec_list *new_params);

+

+   /**

+    * Function return type.

+    *

+    * \note This discards the optional precision qualifier.

+    */

+   const struct glsl_type *return_type;

+

+   /**

+    * List of ir_variable of function parameters.

+    *

+    * This represents the storage.  The paramaters passed in a particular

+    * call will be in ir_call::actual_paramaters.

+    */

+   struct exec_list parameters;

+

+   /** Whether or not this function has a body (which may be empty). */

+   unsigned is_defined:1;

+

+   /** Whether or not this function signature is a built-in. */

+   unsigned is_builtin:1;

+

+   /** Body of instructions in the function. */

+   struct exec_list body;

+

+private:

+   /** Function of which this signature is one overload. */

+   class ir_function *_function;

+

+   friend class ir_function;

+};

+

+

+/**

+ * Header for tracking multiple overloaded functions with the same name.

+ * Contains a list of ir_function_signatures representing each of the

+ * actual functions.

+ */

+class ir_function : public ir_instruction {

+public:

+   ir_function(const char *name);

+

+   virtual ir_function *clone(void *mem_ctx, struct hash_table *ht) const;

+

+   virtual ir_function *as_function()

+   {

+      return this;

+   }

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   void add_signature(ir_function_signature *sig)

+   {

+      sig->_function = this;

+      this->signatures.push_tail(sig);

+   }

+

+   /**

+    * Get an iterator for the set of function signatures

+    */

+   exec_list_iterator iterator()

+   {

+      return signatures.iterator();

+   }

+

+   /**

+    * Find a signature that matches a set of actual parameters, taking implicit

+    * conversions into account.

+    */

+   ir_function_signature *matching_signature(const exec_list *actual_param);

+

+   /**

+    * Find a signature that exactly matches a set of actual parameters without

+    * any implicit type conversions.

+    */

+   ir_function_signature *exact_matching_signature(const exec_list *actual_ps);

+

+   /**

+    * Name of the function.

+    */

+   const char *name;

+

+   /** Whether or not this function has a signature that isn't a built-in. */

+   bool has_user_signature();

+

+   /**

+    * List of ir_function_signature for each overloaded function with this name.

+    */

+   struct exec_list signatures;

+};

+

+inline const char *ir_function_signature::function_name() const

+{

+   return this->_function->name;

+}

+/*@}*/

+

+

+/**

+ * IR instruction representing high-level if-statements

+ */

+class ir_if : public ir_instruction {

+public:

+   ir_if(ir_rvalue *condition)

+      : condition(condition)

+   {

+      ir_type = ir_type_if;

+   }

+

+   virtual ir_if *clone(void *mem_ctx, struct hash_table *ht) const;

+

+   virtual ir_if *as_if()

+   {

+      return this;

+   }

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   ir_rvalue *condition;

+   /** List of ir_instruction for the body of the then branch */

+   exec_list  then_instructions;

+   /** List of ir_instruction for the body of the else branch */

+   exec_list  else_instructions;

+};

+

+

+/**

+ * IR instruction representing a high-level loop structure.

+ */

+class ir_loop : public ir_instruction {

+public:

+   ir_loop();

+

+   virtual ir_loop *clone(void *mem_ctx, struct hash_table *ht) const;

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   virtual ir_loop *as_loop()

+   {

+      return this;

+   }

+

+   /**

+    * Get an iterator for the instructions of the loop body

+    */

+   exec_list_iterator iterator()

+   {

+      return body_instructions.iterator();

+   }

+

+   /** List of ir_instruction that make up the body of the loop. */

+   exec_list body_instructions;

+

+   /**

+    * \name Loop counter and controls

+    *

+    * Represents a loop like a FORTRAN \c do-loop.

+    *

+    * \note

+    * If \c from and \c to are the same value, the loop will execute once.

+    */

+   /*@{*/

+   ir_rvalue *from;             /** Value of the loop counter on the first

+				 * iteration of the loop.

+				 */

+   ir_rvalue *to;               /** Value of the loop counter on the last

+				 * iteration of the loop.

+				 */

+   ir_rvalue *increment;

+   ir_variable *counter;

+

+   /**

+    * Comparison operation in the loop terminator.

+    *

+    * If any of the loop control fields are non-\c NULL, this field must be

+    * one of \c ir_binop_less, \c ir_binop_greater, \c ir_binop_lequal,

+    * \c ir_binop_gequal, \c ir_binop_equal, or \c ir_binop_nequal.

+    */

+   int cmp;

+   /*@}*/

+};

+

+

+class ir_assignment : public ir_instruction {

+public:

+   ir_assignment(ir_rvalue *lhs, ir_rvalue *rhs, ir_rvalue *condition);

+

+   /**

+    * Construct an assignment with an explicit write mask

+    *

+    * \note

+    * Since a write mask is supplied, the LHS must already be a bare

+    * \c ir_dereference.  The cannot be any swizzles in the LHS.

+    */

+   ir_assignment(ir_dereference *lhs, ir_rvalue *rhs, ir_rvalue *condition,

+		 unsigned write_mask);

+

+   virtual ir_assignment *clone(void *mem_ctx, struct hash_table *ht) const;

+

+   virtual ir_constant *constant_expression_value();

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   virtual ir_assignment * as_assignment()

+   {

+      return this;

+   }

+

+   /**

+    * Get a whole variable written by an assignment

+    *

+    * If the LHS of the assignment writes a whole variable, the variable is

+    * returned.  Otherwise \c NULL is returned.  Examples of whole-variable

+    * assignment are:

+    *

+    *  - Assigning to a scalar

+    *  - Assigning to all components of a vector

+    *  - Whole array (or matrix) assignment

+    *  - Whole structure assignment

+    */

+   ir_variable *whole_variable_written();

+

+   /**

+    * Set the LHS of an assignment

+    */

+   void set_lhs(ir_rvalue *lhs);

+

+   /**

+    * Left-hand side of the assignment.

+    *

+    * This should be treated as read only.  If you need to set the LHS of an

+    * assignment, use \c ir_assignment::set_lhs.

+    */

+   ir_dereference *lhs;

+

+   /**

+    * Value being assigned

+    */

+   ir_rvalue *rhs;

+

+   /**

+    * Optional condition for the assignment.

+    */

+   ir_rvalue *condition;

+

+

+   /**

+    * Component mask written

+    *

+    * For non-vector types in the LHS, this field will be zero.  For vector

+    * types, a bit will be set for each component that is written.  Note that

+    * for \c vec2 and \c vec3 types only the lower bits will ever be set.

+    *

+    * A partially-set write mask means that each enabled channel gets

+    * the value from a consecutive channel of the rhs.  For example,

+    * to write just .xyw of gl_FrontColor with color:

+    *

+    * (assign (constant bool (1)) (xyw)

+    *     (var_ref gl_FragColor)

+    *     (swiz xyw (var_ref color)))

+    */

+   unsigned write_mask:4;

+};

+

+/* Update ir_expression::num_operands() and operator_strs when

+ * updating this list.

+ */

+enum ir_expression_operation {

+   ir_unop_bit_not,

+   ir_unop_logic_not,

+   ir_unop_neg,

+   ir_unop_abs,

+   ir_unop_sign,

+   ir_unop_rcp,

+   ir_unop_rsq,

+   ir_unop_sqrt,

+   ir_unop_exp,      /**< Log base e on gentype */

+   ir_unop_log,	     /**< Natural log on gentype */

+   ir_unop_exp2,

+   ir_unop_log2,

+   ir_unop_f2i,      /**< Float-to-integer conversion. */

+   ir_unop_i2f,      /**< Integer-to-float conversion. */

+   ir_unop_f2b,      /**< Float-to-boolean conversion */

+   ir_unop_b2f,      /**< Boolean-to-float conversion */

+   ir_unop_i2b,      /**< int-to-boolean conversion */

+   ir_unop_b2i,      /**< Boolean-to-int conversion */

+   ir_unop_u2f,      /**< Unsigned-to-float conversion. */

+   ir_unop_any,

+

+   /**

+    * \name Unary floating-point rounding operations.

+    */

+   /*@{*/

+   ir_unop_trunc,

+   ir_unop_ceil,

+   ir_unop_floor,

+   ir_unop_fract,

+   ir_unop_round_even,

+   /*@}*/

+

+   /**

+    * \name Trigonometric operations.

+    */

+   /*@{*/

+   ir_unop_sin,

+   ir_unop_cos,

+   ir_unop_sin_reduced,    /**< Reduced range sin. [-pi, pi] */

+   ir_unop_cos_reduced,    /**< Reduced range cos. [-pi, pi] */

+   /*@}*/

+

+   /**

+    * \name Partial derivatives.

+    */

+   /*@{*/

+   ir_unop_dFdx,

+   ir_unop_dFdy,

+   /*@}*/

+

+   ir_unop_noise,

+

+   /**

+    * A sentinel marking the last of the unary operations.

+    */

+   ir_last_unop = ir_unop_noise,

+

+   ir_binop_add,

+   ir_binop_sub,

+   ir_binop_mul,

+   ir_binop_div,

+

+   /**

+    * Takes one of two combinations of arguments:

+    *

+    * - mod(vecN, vecN)

+    * - mod(vecN, float)

+    *

+    * Does not take integer types.

+    */

+   ir_binop_mod,

+

+   /**

+    * \name Binary comparison operators which return a boolean vector.

+    * The type of both operands must be equal.

+    */

+   /*@{*/

+   ir_binop_less,

+   ir_binop_greater,

+   ir_binop_lequal,

+   ir_binop_gequal,

+   ir_binop_equal,

+   ir_binop_nequal,

+   /**

+    * Returns single boolean for whether all components of operands[0]

+    * equal the components of operands[1].

+    */

+   ir_binop_all_equal,

+   /**

+    * Returns single boolean for whether any component of operands[0]

+    * is not equal to the corresponding component of operands[1].

+    */

+   ir_binop_any_nequal,

+   /*@}*/

+

+   /**

+    * \name Bit-wise binary operations.

+    */

+   /*@{*/

+   ir_binop_lshift,

+   ir_binop_rshift,

+   ir_binop_bit_and,

+   ir_binop_bit_xor,

+   ir_binop_bit_or,

+   /*@}*/

+

+   ir_binop_logic_and,

+   ir_binop_logic_xor,

+   ir_binop_logic_or,

+

+   ir_binop_dot,

+   ir_binop_min,

+   ir_binop_max,

+

+   ir_binop_pow,

+

+   /**

+    * A sentinel marking the last of the binary operations.

+    */

+   ir_last_binop = ir_binop_pow,

+

+   ir_quadop_vector,

+

+   /**

+    * A sentinel marking the last of all operations.

+    */

+   ir_last_opcode = ir_last_binop

+};

+

+class ir_expression : public ir_rvalue {

+public:

+   /**

+    * Constructor for unary operation expressions

+    */

+   ir_expression(int op, const struct glsl_type *type, ir_rvalue *);

+   ir_expression(int op, ir_rvalue *);

+

+   /**

+    * Constructor for binary operation expressions

+    */

+   ir_expression(int op, const struct glsl_type *type,

+		 ir_rvalue *, ir_rvalue *);

+   ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1);

+

+   /**

+    * Constructor for quad operator expressions

+    */

+   ir_expression(int op, const struct glsl_type *type,

+		 ir_rvalue *, ir_rvalue *, ir_rvalue *, ir_rvalue *);

+

+   virtual ir_expression *as_expression()

+   {

+      return this;

+   }

+

+   virtual ir_expression *clone(void *mem_ctx, struct hash_table *ht) const;

+

+   /**

+    * Attempt to constant-fold the expression

+    *

+    * If the expression cannot be constant folded, this method will return

+    * \c NULL.

+    */

+   virtual ir_constant *constant_expression_value();

+

+   /**

+    * Determine the number of operands used by an expression

+    */

+   static unsigned int get_num_operands(ir_expression_operation);

+

+   /**

+    * Determine the number of operands used by an expression

+    */

+   unsigned int get_num_operands() const

+   {

+      return (this->operation == ir_quadop_vector)

+	 ? this->type->vector_elements : get_num_operands(operation);

+   }

+

+   /**

+    * Return a string representing this expression's operator.

+    */

+   const char *operator_string();

+

+   /**

+    * Return a string representing this expression's operator.

+    */

+   static const char *operator_string(ir_expression_operation);

+

+

+   /**

+    * Do a reverse-lookup to translate the given string into an operator.

+    */

+   static ir_expression_operation get_operator(const char *);

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   ir_expression_operation operation;

+   ir_rvalue *operands[4];

+};

+

+

+/**

+ * IR instruction representing a function call

+ */

+class ir_call : public ir_rvalue {

+public:

+   ir_call(ir_function_signature *callee, exec_list *actual_parameters)

+      : callee(callee)

+   {

+      ir_type = ir_type_call;

+      assert(callee->return_type != NULL);

+      type = callee->return_type;

+      actual_parameters->move_nodes_to(& this->actual_parameters);

+   }

+

+   virtual ir_call *clone(void *mem_ctx, struct hash_table *ht) const;

+

+   virtual ir_constant *constant_expression_value();

+

+   virtual ir_call *as_call()

+   {

+      return this;

+   }

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   /**

+    * Get a generic ir_call object when an error occurs

+    *

+    * Any allocation will be performed with 'ctx' as ralloc owner.

+    */

+   static ir_call *get_error_instruction(void *ctx);

+

+   /**

+    * Get an iterator for the set of acutal parameters

+    */

+   exec_list_iterator iterator()

+   {

+      return actual_parameters.iterator();

+   }

+

+   /**

+    * Get the name of the function being called.

+    */

+   const char *callee_name() const

+   {

+      return callee->function_name();

+   }

+

+   /**

+    * Get the function signature bound to this function call

+    */

+   ir_function_signature *get_callee()

+   {

+      return callee;

+   }

+

+   /**

+    * Set the function call target

+    */

+   void set_callee(ir_function_signature *sig);

+

+   /**

+    * Generates an inline version of the function before @ir,

+    * returning the return value of the function.

+    */

+   ir_rvalue *generate_inline(ir_instruction *ir);

+

+   /* List of ir_rvalue of paramaters passed in this call. */

+   exec_list actual_parameters;

+

+private:

+   ir_call()

+      : callee(NULL)

+   {

+      this->ir_type = ir_type_call;

+   }

+

+   ir_function_signature *callee;

+};

+

+

+/**

+ * \name Jump-like IR instructions.

+ *

+ * These include \c break, \c continue, \c return, and \c discard.

+ */

+/*@{*/

+class ir_jump : public ir_instruction {

+protected:

+   ir_jump()

+   {

+      ir_type = ir_type_unset;

+   }

+};

+

+class ir_return : public ir_jump {

+public:

+   ir_return()

+      : value(NULL)

+   {

+      this->ir_type = ir_type_return;

+   }

+

+   ir_return(ir_rvalue *value)

+      : value(value)

+   {

+      this->ir_type = ir_type_return;

+   }

+

+   virtual ir_return *clone(void *mem_ctx, struct hash_table *) const;

+

+   virtual ir_return *as_return()

+   {

+      return this;

+   }

+

+   ir_rvalue *get_value() const

+   {

+      return value;

+   }

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   ir_rvalue *value;

+};

+

+

+/**

+ * Jump instructions used inside loops

+ *

+ * These include \c break and \c continue.  The \c break within a loop is

+ * different from the \c break within a switch-statement.

+ *

+ * \sa ir_switch_jump

+ */

+class ir_loop_jump : public ir_jump {

+public:

+   enum jump_mode {

+      jump_break,

+      jump_continue

+   };

+

+   ir_loop_jump(jump_mode mode)

+   {

+      this->ir_type = ir_type_loop_jump;

+      this->mode = mode;

+      this->loop = loop;

+   }

+

+   virtual ir_loop_jump *clone(void *mem_ctx, struct hash_table *) const;

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   bool is_break() const

+   {

+      return mode == jump_break;

+   }

+

+   bool is_continue() const

+   {

+      return mode == jump_continue;

+   }

+

+   /** Mode selector for the jump instruction. */

+   enum jump_mode mode;

+private:

+   /** Loop containing this break instruction. */

+   ir_loop *loop;

+};

+

+/**

+ * IR instruction representing discard statements.

+ */

+class ir_discard : public ir_jump {

+public:

+   ir_discard()

+   {

+      this->ir_type = ir_type_discard;

+      this->condition = NULL;

+   }

+

+   ir_discard(ir_rvalue *cond)

+   {

+      this->ir_type = ir_type_discard;

+      this->condition = cond;

+   }

+

+   virtual ir_discard *clone(void *mem_ctx, struct hash_table *ht) const;

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   virtual ir_discard *as_discard()

+   {

+      return this;

+   }

+

+   ir_rvalue *condition;

+};

+/*@}*/

+

+

+/**

+ * Texture sampling opcodes used in ir_texture

+ */

+enum ir_texture_opcode {

+   ir_tex,		/**< Regular texture look-up */

+   ir_txb,		/**< Texture look-up with LOD bias */

+   ir_txl,		/**< Texture look-up with explicit LOD */

+   ir_txd,		/**< Texture look-up with partial derivatvies */

+   ir_txf		/**< Texel fetch with explicit LOD */

+};

+

+

+/**

+ * IR instruction to sample a texture

+ *

+ * The specific form of the IR instruction depends on the \c mode value

+ * selected from \c ir_texture_opcodes.  In the printed IR, these will

+ * appear as:

+ *

+ *                                    Texel offset (0 or an expression)

+ *                                    | Projection divisor

+ *                                    | |  Shadow comparitor

+ *                                    | |  |

+ *                                    v v  v

+ * (tex <type> <sampler> <coordinate> 0 1 ( ))

+ * (txb <type> <sampler> <coordinate> 0 1 ( ) <bias>)

+ * (txl <type> <sampler> <coordinate> 0 1 ( ) <lod>)

+ * (txd <type> <sampler> <coordinate> 0 1 ( ) (dPdx dPdy))

+ * (txf <type> <sampler> <coordinate> 0       <lod>)

+ */

+class ir_texture : public ir_rvalue {

+public:

+   ir_texture(enum ir_texture_opcode op)

+      : op(op), projector(NULL), shadow_comparitor(NULL), offset(NULL)

+   {

+      this->ir_type = ir_type_texture;

+   }

+

+   virtual ir_texture *clone(void *mem_ctx, struct hash_table *) const;

+

+   virtual ir_constant *constant_expression_value();

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   /**

+    * Return a string representing the ir_texture_opcode.

+    */

+   const char *opcode_string();

+

+   /** Set the sampler and type. */

+   void set_sampler(ir_dereference *sampler, const glsl_type *type);

+

+   /**

+    * Do a reverse-lookup to translate a string into an ir_texture_opcode.

+    */

+   static ir_texture_opcode get_opcode(const char *);

+

+   enum ir_texture_opcode op;

+

+   /** Sampler to use for the texture access. */

+   ir_dereference *sampler;

+

+   /** Texture coordinate to sample */

+   ir_rvalue *coordinate;

+

+   /**

+    * Value used for projective divide.

+    *

+    * If there is no projective divide (the common case), this will be

+    * \c NULL.  Optimization passes should check for this to point to a constant

+    * of 1.0 and replace that with \c NULL.

+    */

+   ir_rvalue *projector;

+

+   /**

+    * Coordinate used for comparison on shadow look-ups.

+    *

+    * If there is no shadow comparison, this will be \c NULL.  For the

+    * \c ir_txf opcode, this *must* be \c NULL.

+    */

+   ir_rvalue *shadow_comparitor;

+

+   /** Texel offset. */

+   ir_rvalue *offset;

+

+   union {

+      ir_rvalue *lod;		/**< Floating point LOD */

+      ir_rvalue *bias;		/**< Floating point LOD bias */

+      struct {

+	 ir_rvalue *dPdx;	/**< Partial derivative of coordinate wrt X */

+	 ir_rvalue *dPdy;	/**< Partial derivative of coordinate wrt Y */

+      } grad;

+   } lod_info;

+};

+

+

+struct ir_swizzle_mask {

+   unsigned x:2;

+   unsigned y:2;

+   unsigned z:2;

+   unsigned w:2;

+

+   /**

+    * Number of components in the swizzle.

+    */

+   unsigned num_components:3;

+

+   /**

+    * Does the swizzle contain duplicate components?

+    *

+    * L-value swizzles cannot contain duplicate components.

+    */

+   unsigned has_duplicates:1;

+};

+

+

+class ir_swizzle : public ir_rvalue {

+public:

+   ir_swizzle(ir_rvalue *, unsigned x, unsigned y, unsigned z, unsigned w,

+              unsigned count);

+

+   ir_swizzle(ir_rvalue *val, const unsigned *components, unsigned count);

+

+   ir_swizzle(ir_rvalue *val, ir_swizzle_mask mask);

+

+   virtual ir_swizzle *clone(void *mem_ctx, struct hash_table *) const;

+

+   virtual ir_constant *constant_expression_value();

+

+   virtual ir_swizzle *as_swizzle()

+   {

+      return this;

+   }

+

+   /**

+    * Construct an ir_swizzle from the textual representation.  Can fail.

+    */

+   static ir_swizzle *create(ir_rvalue *, const char *, unsigned vector_length);

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   bool is_lvalue()

+   {

+      return val->is_lvalue() && !mask.has_duplicates;

+   }

+

+   /**

+    * Get the variable that is ultimately referenced by an r-value

+    */

+   virtual ir_variable *variable_referenced();

+

+   ir_rvalue *val;

+   ir_swizzle_mask mask;

+

+private:

+   /**

+    * Initialize the mask component of a swizzle

+    *

+    * This is used by the \c ir_swizzle constructors.

+    */

+   void init_mask(const unsigned *components, unsigned count);

+};

+

+

+class ir_dereference : public ir_rvalue {

+public:

+   virtual ir_dereference *clone(void *mem_ctx, struct hash_table *) const = 0;

+

+   virtual ir_dereference *as_dereference()

+   {

+      return this;

+   }

+

+   bool is_lvalue();

+

+   /**

+    * Get the variable that is ultimately referenced by an r-value

+    */

+   virtual ir_variable *variable_referenced() = 0;

+};

+

+

+class ir_dereference_variable : public ir_dereference {

+public:

+   ir_dereference_variable(ir_variable *var);

+

+   virtual ir_dereference_variable *clone(void *mem_ctx,

+					  struct hash_table *) const;

+

+   virtual ir_constant *constant_expression_value();

+

+   virtual ir_dereference_variable *as_dereference_variable()

+   {

+      return this;

+   }

+

+   /**

+    * Get the variable that is ultimately referenced by an r-value

+    */

+   virtual ir_variable *variable_referenced()

+   {

+      return this->var;

+   }

+

+   virtual ir_variable *whole_variable_referenced()

+   {

+      /* ir_dereference_variable objects always dereference the entire

+       * variable.  However, if this dereference is dereferenced by anything

+       * else, the complete deferefernce chain is not a whole-variable

+       * dereference.  This method should only be called on the top most

+       * ir_rvalue in a dereference chain.

+       */

+      return this->var;

+   }

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   /**

+    * Object being dereferenced.

+    */

+   ir_variable *var;

+};

+

+

+class ir_dereference_array : public ir_dereference {

+public:

+   ir_dereference_array(ir_rvalue *value, ir_rvalue *array_index);

+

+   ir_dereference_array(ir_variable *var, ir_rvalue *array_index);

+

+   virtual ir_dereference_array *clone(void *mem_ctx,

+				       struct hash_table *) const;

+

+   virtual ir_constant *constant_expression_value();

+

+   virtual ir_dereference_array *as_dereference_array()

+   {

+      return this;

+   }

+

+   /**

+    * Get the variable that is ultimately referenced by an r-value

+    */

+   virtual ir_variable *variable_referenced()

+   {

+      return this->array->variable_referenced();

+   }

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   ir_rvalue *array;

+   ir_rvalue *array_index;

+

+private:

+   void set_array(ir_rvalue *value);

+};

+

+

+class ir_dereference_record : public ir_dereference {

+public:

+   ir_dereference_record(ir_rvalue *value, const char *field);

+

+   ir_dereference_record(ir_variable *var, const char *field);

+

+   virtual ir_dereference_record *clone(void *mem_ctx,

+					struct hash_table *) const;

+

+   virtual ir_constant *constant_expression_value();

+

+   /**

+    * Get the variable that is ultimately referenced by an r-value

+    */

+   virtual ir_variable *variable_referenced()

+   {

+      return this->record->variable_referenced();

+   }

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   ir_rvalue *record;

+   const char *field;

+};

+

+

+/**

+ * Data stored in an ir_constant

+ */

+union ir_constant_data {

+      unsigned u[16];

+      int i[16];

+      float f[16];

+      bool b[16];

+};

+

+

+class ir_constant : public ir_rvalue {

+public:

+   ir_constant(const struct glsl_type *type, const ir_constant_data *data);

+   ir_constant(bool b);

+   ir_constant(unsigned int u);

+   ir_constant(int i);

+   ir_constant(float f);

+

+   /**

+    * Construct an ir_constant from a list of ir_constant values

+    */

+   ir_constant(const struct glsl_type *type, exec_list *values);

+

+   /**

+    * Construct an ir_constant from a scalar component of another ir_constant

+    *

+    * The new \c ir_constant inherits the type of the component from the

+    * source constant.

+    *

+    * \note

+    * In the case of a matrix constant, the new constant is a scalar, \b not

+    * a vector.

+    */

+   ir_constant(const ir_constant *c, unsigned i);

+

+   /**

+    * Return a new ir_constant of the specified type containing all zeros.

+    */

+   static ir_constant *zero(void *mem_ctx, const glsl_type *type);

+

+   virtual ir_constant *clone(void *mem_ctx, struct hash_table *) const;

+

+   virtual ir_constant *constant_expression_value();

+

+   virtual ir_constant *as_constant()

+   {

+      return this;

+   }

+

+   virtual void accept(ir_visitor *v)

+   {

+      v->visit(this);

+   }

+

+   virtual ir_visitor_status accept(ir_hierarchical_visitor *);

+

+   /**

+    * Get a particular component of a constant as a specific type

+    *

+    * This is useful, for example, to get a value from an integer constant

+    * as a float or bool.  This appears frequently when constructors are

+    * called with all constant parameters.

+    */

+   /*@{*/

+   bool get_bool_component(unsigned i) const;

+   float get_float_component(unsigned i) const;

+   int get_int_component(unsigned i) const;

+   unsigned get_uint_component(unsigned i) const;

+   /*@}*/

+

+   ir_constant *get_array_element(unsigned i) const;

+

+   ir_constant *get_record_field(const char *name);

+

+   /**

+    * Determine whether a constant has the same value as another constant

+    *

+    * \sa ir_constant::is_zero, ir_constant::is_one,

+    * ir_constant::is_negative_one

+    */

+   bool has_value(const ir_constant *) const;

+

+   virtual bool is_zero() const;

+   virtual bool is_one() const;

+   virtual bool is_negative_one() const;

+

+   /**

+    * Value of the constant.

+    *

+    * The field used to back the values supplied by the constant is determined

+    * by the type associated with the \c ir_instruction.  Constants may be

+    * scalars, vectors, or matrices.

+    */

+   union ir_constant_data value;

+

+   /* Array elements */

+   ir_constant **array_elements;

+

+   /* Structure fields */

+   exec_list components;

+

+private:

+   /**

+    * Parameterless constructor only used by the clone method

+    */

+   ir_constant(void);

+};

+

+/*@}*/

+

+/**

+ * Apply a visitor to each IR node in a list

+ */

+void

+visit_exec_list(exec_list *list, ir_visitor *visitor);

+

+/**

+ * Validate invariants on each IR node in a list

+ */

+void validate_ir_tree(exec_list *instructions);

+

+/**

+ * Make a clone of each IR instruction in a list

+ *

+ * \param in   List of IR instructions that are to be cloned

+ * \param out  List to hold the cloned instructions

+ */

+void

+clone_ir_list(void *mem_ctx, exec_list *out, const exec_list *in);

+

+extern void

+_mesa_glsl_initialize_variables(exec_list *instructions,

+				struct _mesa_glsl_parse_state *state);

+

+extern void

+_mesa_glsl_initialize_functions(_mesa_glsl_parse_state *state);

+

+extern void

+_mesa_glsl_release_functions(void);

+

+extern void

+reparent_ir(exec_list *list, void *mem_ctx);

+

+struct glsl_symbol_table;

+

+extern void

+import_prototypes(const exec_list *source, exec_list *dest,

+		  struct glsl_symbol_table *symbols, void *mem_ctx);

+

+extern bool

+ir_has_call(ir_instruction *ir);

+

+extern void

+do_set_program_inouts(exec_list *instructions, struct gl_program *prog);

+

+#endif /* IR_H */

diff --git a/mesalib/src/glsl/ir_print_visitor.cpp b/mesalib/src/glsl/ir_print_visitor.cpp
index 82ccc722f..3c5c4fd20 100644
--- a/mesalib/src/glsl/ir_print_visitor.cpp
+++ b/mesalib/src/glsl/ir_print_visitor.cpp
@@ -1,471 +1,474 @@
-/*
- * Copyright © 2010 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- */
-
-#include "ir_print_visitor.h"
-#include "glsl_types.h"
-#include "glsl_parser_extras.h"
-
-static void print_type(const glsl_type *t);
-
-void
-ir_instruction::print(void) const
-{
-   ir_instruction *deconsted = const_cast<ir_instruction *>(this);
-
-   ir_print_visitor v;
-   deconsted->accept(&v);
-}
-
-void
-_mesa_print_ir(exec_list *instructions,
-	       struct _mesa_glsl_parse_state *state)
-{
-   if (state) {
-      for (unsigned i = 0; i < state->num_user_structures; i++) {
-	 const glsl_type *const s = state->user_structures[i];
-
-	 printf("(structure (%s) (%s@%p) (%u) (\n",
-		s->name, s->name, (void *) s, s->length);
-
-	 for (unsigned j = 0; j < s->length; j++) {
-	    printf("\t((");
-	    print_type(s->fields.structure[j].type);
-	    printf(")(%s))\n", s->fields.structure[j].name);
-	 }
-
-	 printf(")\n");
-      }
-   }
-
-   printf("(\n");
-   foreach_iter(exec_list_iterator, iter, *instructions) {
-      ir_instruction *ir = (ir_instruction *)iter.get();
-      ir->print();
-      if (ir->ir_type != ir_type_function)
-	 printf("\n");
-   }
-   printf("\n)");
-}
-
-
-void ir_print_visitor::indent(void)
-{
-   for (int i = 0; i < indentation; i++)
-      printf("  ");
-}
-
-static void
-print_type(const glsl_type *t)
-{
-   if (t->base_type == GLSL_TYPE_ARRAY) {
-      printf("(array ");
-      print_type(t->fields.array);
-      printf(" %u)", t->length);
-   } else if ((t->base_type == GLSL_TYPE_STRUCT)
-	      && (strncmp("gl_", t->name, 3) != 0)) {
-      printf("%s@%p", t->name, (void *) t);
-   } else {
-      printf("%s", t->name);
-   }
-}
-
-
-void ir_print_visitor::visit(ir_variable *ir)
-{
-   printf("(declare ");
-
-   const char *const cent = (ir->centroid) ? "centroid " : "";
-   const char *const inv = (ir->invariant) ? "invariant " : "";
-   const char *const mode[] = { "", "uniform ", "in ", "out ", "inout ",
-			        "const_in ", "sys ", "temporary " };
-   const char *const interp[] = { "", "flat", "noperspective" };
-
-   printf("(%s%s%s%s) ",
-	  cent, inv, mode[ir->mode], interp[ir->interpolation]);
-
-   print_type(ir->type);
-   printf(" %s@%p)", ir->name, (void *) ir);
-}
-
-
-void ir_print_visitor::visit(ir_function_signature *ir)
-{
-   printf("(signature ");
-   indentation++;
-
-   print_type(ir->return_type);
-   printf("\n");
-   indent();
-
-   printf("(parameters\n");
-   indentation++;
-
-   foreach_iter(exec_list_iterator, iter, ir->parameters) {
-      ir_variable *const inst = (ir_variable *) iter.get();
-
-      indent();
-      inst->accept(this);
-      printf("\n");
-   }
-   indentation--;
-
-   indent();
-   printf(")\n");
-
-   indent();
-
-   printf("(\n");
-   indentation++;
-
-   foreach_iter(exec_list_iterator, iter, ir->body) {
-      ir_instruction *const inst = (ir_instruction *) iter.get();
-
-      indent();
-      inst->accept(this);
-      printf("\n");
-   }
-   indentation--;
-   indent();
-   printf("))\n");
-   indentation--;
-}
-
-
-void ir_print_visitor::visit(ir_function *ir)
-{
-   printf("(function %s\n", ir->name);
-   indentation++;
-   foreach_iter(exec_list_iterator, iter, *ir) {
-      ir_function_signature *const sig = (ir_function_signature *) iter.get();
-      indent();
-      sig->accept(this);
-      printf("\n");
-   }
-   indentation--;
-   indent();
-   printf(")\n\n");
-}
-
-
-void ir_print_visitor::visit(ir_expression *ir)
-{
-   printf("(expression ");
-
-   print_type(ir->type);
-
-   printf(" %s ", ir->operator_string());
-
-   for (unsigned i = 0; i < ir->get_num_operands(); i++) {
-      ir->operands[i]->accept(this);
-   }
-
-   printf(") ");
-}
-
-
-void ir_print_visitor::visit(ir_texture *ir)
-{
-   printf("(%s ", ir->opcode_string());
-
-   ir->sampler->accept(this);
-   printf(" ");
-
-   ir->coordinate->accept(this);
-
-   printf(" ");
-
-   if (ir->offset != NULL) {
-      ir->offset->accept(this);
-   } else {
-      printf("0");
-   }
-
-   printf(" ");
-
-   if (ir->op != ir_txf) {
-      if (ir->projector)
-	 ir->projector->accept(this);
-      else
-	 printf("1");
-
-      if (ir->shadow_comparitor) {
-	 printf(" ");
-	 ir->shadow_comparitor->accept(this);
-      } else {
-	 printf(" ()");
-      }
-   }
-
-   printf(" ");
-   switch (ir->op)
-   {
-   case ir_tex:
-      break;
-   case ir_txb:
-      ir->lod_info.bias->accept(this);
-      break;
-   case ir_txl:
-   case ir_txf:
-      ir->lod_info.lod->accept(this);
-      break;
-   case ir_txd:
-      printf("(");
-      ir->lod_info.grad.dPdx->accept(this);
-      printf(" ");
-      ir->lod_info.grad.dPdy->accept(this);
-      printf(")");
-      break;
-   };
-   printf(")");
-}
-
-
-void ir_print_visitor::visit(ir_swizzle *ir)
-{
-   const unsigned swiz[4] = {
-      ir->mask.x,
-      ir->mask.y,
-      ir->mask.z,
-      ir->mask.w,
-   };
-
-   printf("(swiz ");
-   for (unsigned i = 0; i < ir->mask.num_components; i++) {
-      printf("%c", "xyzw"[swiz[i]]);
-   }
-   printf(" ");
-   ir->val->accept(this);
-   printf(")");
-}
-
-
-void ir_print_visitor::visit(ir_dereference_variable *ir)
-{
-   ir_variable *var = ir->variable_referenced();
-   printf("(var_ref %s@%p) ", var->name, (void *) var);
-}
-
-
-void ir_print_visitor::visit(ir_dereference_array *ir)
-{
-   printf("(array_ref ");
-   ir->array->accept(this);
-   ir->array_index->accept(this);
-   printf(") ");
-}
-
-
-void ir_print_visitor::visit(ir_dereference_record *ir)
-{
-   printf("(record_ref ");
-   ir->record->accept(this);
-   printf(" %s) ", ir->field);
-}
-
-
-void ir_print_visitor::visit(ir_assignment *ir)
-{
-   printf("(assign ");
-
-   if (ir->condition)
-      ir->condition->accept(this);
-
-   char mask[5];
-   unsigned j = 0;
-
-   for (unsigned i = 0; i < 4; i++) {
-      if ((ir->write_mask & (1 << i)) != 0) {
-	 mask[j] = "xyzw"[i];
-	 j++;
-      }
-   }
-   mask[j] = '\0';
-
-   printf(" (%s) ", mask);
-
-   ir->lhs->accept(this);
-
-   printf(" ");
-
-   ir->rhs->accept(this);
-   printf(") ");
-}
-
-
-void ir_print_visitor::visit(ir_constant *ir)
-{
-   const glsl_type *const base_type = ir->type->get_base_type();
-
-   printf("(constant ");
-   print_type(ir->type);
-   printf(" (");
-
-   if (ir->type->is_array()) {
-      for (unsigned i = 0; i < ir->type->length; i++)
-	 ir->get_array_element(i)->accept(this);
-   } else if (ir->type->is_record()) {
-      ir_constant *value = (ir_constant *) ir->components.get_head();
-      for (unsigned i = 0; i < ir->type->length; i++) {
-	 printf("(%s ", ir->type->fields.structure->name);
-	 value->accept(this);
-	 printf(")");
-
-	 value = (ir_constant *) value->next;
-      }
-   } else {
-      for (unsigned i = 0; i < ir->type->components(); i++) {
-	 if (i != 0)
-	    printf(" ");
-	 switch (base_type->base_type) {
-	 case GLSL_TYPE_UINT:  printf("%u", ir->value.u[i]); break;
-	 case GLSL_TYPE_INT:   printf("%d", ir->value.i[i]); break;
-	 case GLSL_TYPE_FLOAT: printf("%f", ir->value.f[i]); break;
-	 case GLSL_TYPE_BOOL:  printf("%d", ir->value.b[i]); break;
-	 default: assert(0);
-	 }
-      }
-   }
-   printf(")) ");
-}
-
-
-void
-ir_print_visitor::visit(ir_call *ir)
-{
-   printf("(call %s (", ir->callee_name());
-   foreach_iter(exec_list_iterator, iter, *ir) {
-      ir_instruction *const inst = (ir_instruction *) iter.get();
-
-      inst->accept(this);
-   }
-   printf("))\n");
-}
-
-
-void
-ir_print_visitor::visit(ir_return *ir)
-{
-   printf("(return");
-
-   ir_rvalue *const value = ir->get_value();
-   if (value) {
-      printf(" ");
-      value->accept(this);
-   }
-
-   printf(")");
-}
-
-
-void
-ir_print_visitor::visit(ir_discard *ir)
-{
-   printf("(discard ");
-
-   if (ir->condition != NULL) {
-      printf(" ");
-      ir->condition->accept(this);
-   }
-
-   printf(")");
-}
-
-
-void
-ir_print_visitor::visit(ir_if *ir)
-{
-   printf("(if ");
-   ir->condition->accept(this);
-
-   printf("(\n");
-   indentation++;
-
-   foreach_iter(exec_list_iterator, iter, ir->then_instructions) {
-      ir_instruction *const inst = (ir_instruction *) iter.get();
-
-      indent();
-      inst->accept(this);
-      printf("\n");
-   }
-
-   indentation--;
-   indent();
-   printf(")\n");
-
-   indent();
-   if (!ir->else_instructions.is_empty()) {
-      printf("(\n");
-      indentation++;
-
-      foreach_iter(exec_list_iterator, iter, ir->else_instructions) {
-	 ir_instruction *const inst = (ir_instruction *) iter.get();
-
-	 indent();
-	 inst->accept(this);
-	 printf("\n");
-      }
-      indentation--;
-      indent();
-      printf("))\n");
-   } else {
-      printf("())\n");
-   }
-}
-
-
-void
-ir_print_visitor::visit(ir_loop *ir)
-{
-   printf("(loop (");
-   if (ir->counter != NULL)
-      ir->counter->accept(this);
-   printf(") (");
-   if (ir->from != NULL)
-      ir->from->accept(this);
-   printf(") (");
-   if (ir->to != NULL)
-      ir->to->accept(this);
-   printf(") (");
-   if (ir->increment != NULL)
-      ir->increment->accept(this);
-   printf(") (\n");
-   indentation++;
-
-   foreach_iter(exec_list_iterator, iter, ir->body_instructions) {
-      ir_instruction *const inst = (ir_instruction *) iter.get();
-
-      indent();
-      inst->accept(this);
-      printf("\n");
-   }
-   indentation--;
-   indent();
-   printf("))\n");
-}
-
-
-void
-ir_print_visitor::visit(ir_loop_jump *ir)
-{
-   printf("%s", ir->is_break() ? "break" : "continue");
-}
+/*

+ * Copyright © 2010 Intel Corporation

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the "Software"),

+ * to deal in the Software without restriction, including without limitation

+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,

+ * and/or sell copies of the Software, and to permit persons to whom the

+ * Software is furnished to do so, subject to the following conditions:

+ *

+ * The above copyright notice and this permission notice (including the next

+ * paragraph) shall be included in all copies or substantial portions of the

+ * Software.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

+ * DEALINGS IN THE SOFTWARE.

+ */

+

+#include "ir_print_visitor.h"

+#include "glsl_types.h"

+#include "glsl_parser_extras.h"

+

+static void print_type(const glsl_type *t);

+

+void

+ir_instruction::print(void) const

+{

+   ir_instruction *deconsted = const_cast<ir_instruction *>(this);

+

+   ir_print_visitor v;

+   deconsted->accept(&v);

+}

+

+void

+_mesa_print_ir(exec_list *instructions,

+	       struct _mesa_glsl_parse_state *state)

+{

+   if (state) {

+      for (unsigned i = 0; i < state->num_user_structures; i++) {

+	 const glsl_type *const s = state->user_structures[i];

+

+	 printf("(structure (%s) (%s@%p) (%u) (\n",

+		s->name, s->name, (void *) s, s->length);

+

+	 for (unsigned j = 0; j < s->length; j++) {

+	    printf("\t((");

+	    print_type(s->fields.structure[j].type);

+	    printf(")(%s))\n", s->fields.structure[j].name);

+	 }

+

+	 printf(")\n");

+      }

+   }

+

+   printf("(\n");

+   foreach_iter(exec_list_iterator, iter, *instructions) {

+      ir_instruction *ir = (ir_instruction *)iter.get();

+      ir->print();

+      if (ir->ir_type != ir_type_function)

+	 printf("\n");

+   }

+   printf("\n)");

+}

+

+

+void ir_print_visitor::indent(void)

+{

+   for (int i = 0; i < indentation; i++)

+      printf("  ");

+}

+

+static void

+print_type(const glsl_type *t)

+{

+   if (t->base_type == GLSL_TYPE_ARRAY) {

+      printf("(array ");

+      print_type(t->fields.array);

+      printf(" %u)", t->length);

+   } else if ((t->base_type == GLSL_TYPE_STRUCT)

+	      && (strncmp("gl_", t->name, 3) != 0)) {

+      printf("%s@%p", t->name, (void *) t);

+   } else {

+      printf("%s", t->name);

+   }

+}

+

+

+void ir_print_visitor::visit(ir_variable *ir)

+{

+   printf("(declare ");

+

+   const char *const cent = (ir->centroid) ? "centroid " : "";

+   const char *const inv = (ir->invariant) ? "invariant " : "";

+   const char *const mode[] = { "", "uniform ", "in ", "out ", "inout ",

+			        "const_in ", "sys ", "temporary " };

+   const char *const interp[] = { "", "flat", "noperspective" };

+

+   printf("(%s%s%s%s) ",

+	  cent, inv, mode[ir->mode], interp[ir->interpolation]);

+

+   print_type(ir->type);

+   printf(" %s@%p)", ir->name, (void *) ir);

+}

+

+

+void ir_print_visitor::visit(ir_function_signature *ir)

+{

+   printf("(signature ");

+   indentation++;

+

+   print_type(ir->return_type);

+   printf("\n");

+   indent();

+

+   printf("(parameters\n");

+   indentation++;

+

+   foreach_iter(exec_list_iterator, iter, ir->parameters) {

+      ir_variable *const inst = (ir_variable *) iter.get();

+

+      indent();

+      inst->accept(this);

+      printf("\n");

+   }

+   indentation--;

+

+   indent();

+   printf(")\n");

+

+   indent();

+

+   printf("(\n");

+   indentation++;

+

+   foreach_iter(exec_list_iterator, iter, ir->body) {

+      ir_instruction *const inst = (ir_instruction *) iter.get();

+

+      indent();

+      inst->accept(this);

+      printf("\n");

+   }

+   indentation--;

+   indent();

+   printf("))\n");

+   indentation--;

+}

+

+

+void ir_print_visitor::visit(ir_function *ir)

+{

+   printf("(function %s\n", ir->name);

+   indentation++;

+   foreach_iter(exec_list_iterator, iter, *ir) {

+      ir_function_signature *const sig = (ir_function_signature *) iter.get();

+      indent();

+      sig->accept(this);

+      printf("\n");

+   }

+   indentation--;

+   indent();

+   printf(")\n\n");

+}

+

+

+void ir_print_visitor::visit(ir_expression *ir)

+{

+   printf("(expression ");

+

+   print_type(ir->type);

+

+   printf(" %s ", ir->operator_string());

+

+   for (unsigned i = 0; i < ir->get_num_operands(); i++) {

+      ir->operands[i]->accept(this);

+   }

+

+   printf(") ");

+}

+

+

+void ir_print_visitor::visit(ir_texture *ir)

+{

+   printf("(%s ", ir->opcode_string());

+

+   print_type(ir->type);

+   printf(" ");

+

+   ir->sampler->accept(this);

+   printf(" ");

+

+   ir->coordinate->accept(this);

+

+   printf(" ");

+

+   if (ir->offset != NULL) {

+      ir->offset->accept(this);

+   } else {

+      printf("0");

+   }

+

+   printf(" ");

+

+   if (ir->op != ir_txf) {

+      if (ir->projector)

+	 ir->projector->accept(this);

+      else

+	 printf("1");

+

+      if (ir->shadow_comparitor) {

+	 printf(" ");

+	 ir->shadow_comparitor->accept(this);

+      } else {

+	 printf(" ()");

+      }

+   }

+

+   printf(" ");

+   switch (ir->op)

+   {

+   case ir_tex:

+      break;

+   case ir_txb:

+      ir->lod_info.bias->accept(this);

+      break;

+   case ir_txl:

+   case ir_txf:

+      ir->lod_info.lod->accept(this);

+      break;

+   case ir_txd:

+      printf("(");

+      ir->lod_info.grad.dPdx->accept(this);

+      printf(" ");

+      ir->lod_info.grad.dPdy->accept(this);

+      printf(")");

+      break;

+   };

+   printf(")");

+}

+

+

+void ir_print_visitor::visit(ir_swizzle *ir)

+{

+   const unsigned swiz[4] = {

+      ir->mask.x,

+      ir->mask.y,

+      ir->mask.z,

+      ir->mask.w,

+   };

+

+   printf("(swiz ");

+   for (unsigned i = 0; i < ir->mask.num_components; i++) {

+      printf("%c", "xyzw"[swiz[i]]);

+   }

+   printf(" ");

+   ir->val->accept(this);

+   printf(")");

+}

+

+

+void ir_print_visitor::visit(ir_dereference_variable *ir)

+{

+   ir_variable *var = ir->variable_referenced();

+   printf("(var_ref %s@%p) ", var->name, (void *) var);

+}

+

+

+void ir_print_visitor::visit(ir_dereference_array *ir)

+{

+   printf("(array_ref ");

+   ir->array->accept(this);

+   ir->array_index->accept(this);

+   printf(") ");

+}

+

+

+void ir_print_visitor::visit(ir_dereference_record *ir)

+{

+   printf("(record_ref ");

+   ir->record->accept(this);

+   printf(" %s) ", ir->field);

+}

+

+

+void ir_print_visitor::visit(ir_assignment *ir)

+{

+   printf("(assign ");

+

+   if (ir->condition)

+      ir->condition->accept(this);

+

+   char mask[5];

+   unsigned j = 0;

+

+   for (unsigned i = 0; i < 4; i++) {

+      if ((ir->write_mask & (1 << i)) != 0) {

+	 mask[j] = "xyzw"[i];

+	 j++;

+      }

+   }

+   mask[j] = '\0';

+

+   printf(" (%s) ", mask);

+

+   ir->lhs->accept(this);

+

+   printf(" ");

+

+   ir->rhs->accept(this);

+   printf(") ");

+}

+

+

+void ir_print_visitor::visit(ir_constant *ir)

+{

+   const glsl_type *const base_type = ir->type->get_base_type();

+

+   printf("(constant ");

+   print_type(ir->type);

+   printf(" (");

+

+   if (ir->type->is_array()) {

+      for (unsigned i = 0; i < ir->type->length; i++)

+	 ir->get_array_element(i)->accept(this);

+   } else if (ir->type->is_record()) {

+      ir_constant *value = (ir_constant *) ir->components.get_head();

+      for (unsigned i = 0; i < ir->type->length; i++) {

+	 printf("(%s ", ir->type->fields.structure->name);

+	 value->accept(this);

+	 printf(")");

+

+	 value = (ir_constant *) value->next;

+      }

+   } else {

+      for (unsigned i = 0; i < ir->type->components(); i++) {

+	 if (i != 0)

+	    printf(" ");

+	 switch (base_type->base_type) {

+	 case GLSL_TYPE_UINT:  printf("%u", ir->value.u[i]); break;

+	 case GLSL_TYPE_INT:   printf("%d", ir->value.i[i]); break;

+	 case GLSL_TYPE_FLOAT: printf("%f", ir->value.f[i]); break;

+	 case GLSL_TYPE_BOOL:  printf("%d", ir->value.b[i]); break;

+	 default: assert(0);

+	 }

+      }

+   }

+   printf(")) ");

+}

+

+

+void

+ir_print_visitor::visit(ir_call *ir)

+{

+   printf("(call %s (", ir->callee_name());

+   foreach_iter(exec_list_iterator, iter, *ir) {

+      ir_instruction *const inst = (ir_instruction *) iter.get();

+

+      inst->accept(this);

+   }

+   printf("))\n");

+}

+

+

+void

+ir_print_visitor::visit(ir_return *ir)

+{

+   printf("(return");

+

+   ir_rvalue *const value = ir->get_value();

+   if (value) {

+      printf(" ");

+      value->accept(this);

+   }

+

+   printf(")");

+}

+

+

+void

+ir_print_visitor::visit(ir_discard *ir)

+{

+   printf("(discard ");

+

+   if (ir->condition != NULL) {

+      printf(" ");

+      ir->condition->accept(this);

+   }

+

+   printf(")");

+}

+

+

+void

+ir_print_visitor::visit(ir_if *ir)

+{

+   printf("(if ");

+   ir->condition->accept(this);

+

+   printf("(\n");

+   indentation++;

+

+   foreach_iter(exec_list_iterator, iter, ir->then_instructions) {

+      ir_instruction *const inst = (ir_instruction *) iter.get();

+

+      indent();

+      inst->accept(this);

+      printf("\n");

+   }

+

+   indentation--;

+   indent();

+   printf(")\n");

+

+   indent();

+   if (!ir->else_instructions.is_empty()) {

+      printf("(\n");

+      indentation++;

+

+      foreach_iter(exec_list_iterator, iter, ir->else_instructions) {

+	 ir_instruction *const inst = (ir_instruction *) iter.get();

+

+	 indent();

+	 inst->accept(this);

+	 printf("\n");

+      }

+      indentation--;

+      indent();

+      printf("))\n");

+   } else {

+      printf("())\n");

+   }

+}

+

+

+void

+ir_print_visitor::visit(ir_loop *ir)

+{

+   printf("(loop (");

+   if (ir->counter != NULL)

+      ir->counter->accept(this);

+   printf(") (");

+   if (ir->from != NULL)

+      ir->from->accept(this);

+   printf(") (");

+   if (ir->to != NULL)

+      ir->to->accept(this);

+   printf(") (");

+   if (ir->increment != NULL)

+      ir->increment->accept(this);

+   printf(") (\n");

+   indentation++;

+

+   foreach_iter(exec_list_iterator, iter, ir->body_instructions) {

+      ir_instruction *const inst = (ir_instruction *) iter.get();

+

+      indent();

+      inst->accept(this);

+      printf("\n");

+   }

+   indentation--;

+   indent();

+   printf("))\n");

+}

+

+

+void

+ir_print_visitor::visit(ir_loop_jump *ir)

+{

+   printf("%s", ir->is_break() ? "break" : "continue");

+}

diff --git a/mesalib/src/glsl/ir_reader.cpp b/mesalib/src/glsl/ir_reader.cpp
index af85e06ae..201e436be 100644
--- a/mesalib/src/glsl/ir_reader.cpp
+++ b/mesalib/src/glsl/ir_reader.cpp
@@ -1,996 +1,1005 @@
-/*
- * Copyright © 2010 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- */
-
-#include "ir_reader.h"
-#include "glsl_parser_extras.h"
-#include "glsl_types.h"
-#include "s_expression.h"
-
-const static bool debug = false;
-
-class ir_reader {
-public:
-   ir_reader(_mesa_glsl_parse_state *);
-
-   void read(exec_list *instructions, const char *src, bool scan_for_protos);
-
-private:
-   void *mem_ctx;
-   _mesa_glsl_parse_state *state;
-
-   void ir_read_error(s_expression *, const char *fmt, ...);
-
-   const glsl_type *read_type(s_expression *);
-
-   void scan_for_prototypes(exec_list *, s_expression *);
-   ir_function *read_function(s_expression *, bool skip_body);
-   void read_function_sig(ir_function *, s_expression *, bool skip_body);
-
-   void read_instructions(exec_list *, s_expression *, ir_loop *);
-   ir_instruction *read_instruction(s_expression *, ir_loop *);
-   ir_variable *read_declaration(s_expression *);
-   ir_if *read_if(s_expression *, ir_loop *);
-   ir_loop *read_loop(s_expression *);
-   ir_return *read_return(s_expression *);
-   ir_rvalue *read_rvalue(s_expression *);
-   ir_assignment *read_assignment(s_expression *);
-   ir_expression *read_expression(s_expression *);
-   ir_call *read_call(s_expression *);
-   ir_swizzle *read_swizzle(s_expression *);
-   ir_constant *read_constant(s_expression *);
-   ir_texture *read_texture(s_expression *);
-
-   ir_dereference *read_dereference(s_expression *);
-};
-
-ir_reader::ir_reader(_mesa_glsl_parse_state *state) : state(state)
-{
-   this->mem_ctx = state;
-}
-
-void
-_mesa_glsl_read_ir(_mesa_glsl_parse_state *state, exec_list *instructions,
-		   const char *src, bool scan_for_protos)
-{
-   ir_reader r(state);
-   r.read(instructions, src, scan_for_protos);
-}
-
-void
-ir_reader::read(exec_list *instructions, const char *src, bool scan_for_protos)
-{
-   s_expression *expr = s_expression::read_expression(mem_ctx, src);
-   if (expr == NULL) {
-      ir_read_error(NULL, "couldn't parse S-Expression.");
-      return;
-   }
-   
-   if (scan_for_protos) {
-      scan_for_prototypes(instructions, expr);
-      if (state->error)
-	 return;
-   }
-
-   read_instructions(instructions, expr, NULL);
-   ralloc_free(expr);
-
-   if (debug)
-      validate_ir_tree(instructions);
-}
-
-void
-ir_reader::ir_read_error(s_expression *expr, const char *fmt, ...)
-{
-   va_list ap;
-
-   state->error = true;
-
-   if (state->current_function != NULL)
-      ralloc_asprintf_append(&state->info_log, "In function %s:\n",
-			     state->current_function->function_name());
-   ralloc_strcat(&state->info_log, "error: ");
-
-   va_start(ap, fmt);
-   ralloc_vasprintf_append(&state->info_log, fmt, ap);
-   va_end(ap);
-   ralloc_strcat(&state->info_log, "\n");
-
-   if (expr != NULL) {
-      ralloc_strcat(&state->info_log, "...in this context:\n   ");
-      expr->print();
-      ralloc_strcat(&state->info_log, "\n\n");
-   }
-}
-
-const glsl_type *
-ir_reader::read_type(s_expression *expr)
-{
-   s_expression *s_base_type;
-   s_int *s_size;
-
-   s_pattern pat[] = { "array", s_base_type, s_size };
-   if (MATCH(expr, pat)) {
-      const glsl_type *base_type = read_type(s_base_type);
-      if (base_type == NULL) {
-	 ir_read_error(NULL, "when reading base type of array type");
-	 return NULL;
-      }
-
-      return glsl_type::get_array_instance(base_type, s_size->value());
-   }
-   
-   s_symbol *type_sym = SX_AS_SYMBOL(expr);
-   if (type_sym == NULL) {
-      ir_read_error(expr, "expected <type>");
-      return NULL;
-   }
-
-   const glsl_type *type = state->symbols->get_type(type_sym->value());
-   if (type == NULL)
-      ir_read_error(expr, "invalid type: %s", type_sym->value());
-
-   return type;
-}
-
-
-void
-ir_reader::scan_for_prototypes(exec_list *instructions, s_expression *expr)
-{
-   s_list *list = SX_AS_LIST(expr);
-   if (list == NULL) {
-      ir_read_error(expr, "Expected (<instruction> ...); found an atom.");
-      return;
-   }
-
-   foreach_iter(exec_list_iterator, it, list->subexpressions) {
-      s_list *sub = SX_AS_LIST(it.get());
-      if (sub == NULL)
-	 continue; // not a (function ...); ignore it.
-
-      s_symbol *tag = SX_AS_SYMBOL(sub->subexpressions.get_head());
-      if (tag == NULL || strcmp(tag->value(), "function") != 0)
-	 continue; // not a (function ...); ignore it.
-
-      ir_function *f = read_function(sub, true);
-      if (f == NULL)
-	 return;
-      instructions->push_tail(f);
-   }
-}
-
-ir_function *
-ir_reader::read_function(s_expression *expr, bool skip_body)
-{
-   bool added = false;
-   s_symbol *name;
-
-   s_pattern pat[] = { "function", name };
-   if (!PARTIAL_MATCH(expr, pat)) {
-      ir_read_error(expr, "Expected (function <name> (signature ...) ...)");
-      return NULL;
-   }
-
-   ir_function *f = state->symbols->get_function(name->value());
-   if (f == NULL) {
-      f = new(mem_ctx) ir_function(name->value());
-      added = state->symbols->add_function(f);
-      assert(added);
-   }
-
-   exec_list_iterator it = ((s_list *) expr)->subexpressions.iterator();
-   it.next(); // skip "function" tag
-   it.next(); // skip function name
-   for (/* nothing */; it.has_next(); it.next()) {
-      s_expression *s_sig = (s_expression *) it.get();
-      read_function_sig(f, s_sig, skip_body);
-   }
-   return added ? f : NULL;
-}
-
-void
-ir_reader::read_function_sig(ir_function *f, s_expression *expr, bool skip_body)
-{
-   s_expression *type_expr;
-   s_list *paramlist;
-   s_list *body_list;
-
-   s_pattern pat[] = { "signature", type_expr, paramlist, body_list };
-   if (!MATCH(expr, pat)) {
-      ir_read_error(expr, "Expected (signature <type> (parameters ...) "
-			  "(<instruction> ...))");
-      return;
-   }
-
-   const glsl_type *return_type = read_type(type_expr);
-   if (return_type == NULL)
-      return;
-
-   s_symbol *paramtag = SX_AS_SYMBOL(paramlist->subexpressions.get_head());
-   if (paramtag == NULL || strcmp(paramtag->value(), "parameters") != 0) {
-      ir_read_error(paramlist, "Expected (parameters ...)");
-      return;
-   }
-
-   // Read the parameters list into a temporary place.
-   exec_list hir_parameters;
-   state->symbols->push_scope();
-
-   exec_list_iterator it = paramlist->subexpressions.iterator();
-   for (it.next() /* skip "parameters" */; it.has_next(); it.next()) {
-      ir_variable *var = read_declaration((s_expression *) it.get());
-      if (var == NULL)
-	 return;
-
-      hir_parameters.push_tail(var);
-   }
-
-   ir_function_signature *sig = f->exact_matching_signature(&hir_parameters);
-   if (sig == NULL && skip_body) {
-      /* If scanning for prototypes, generate a new signature. */
-      sig = new(mem_ctx) ir_function_signature(return_type);
-      sig->is_builtin = true;
-      f->add_signature(sig);
-   } else if (sig != NULL) {
-      const char *badvar = sig->qualifiers_match(&hir_parameters);
-      if (badvar != NULL) {
-	 ir_read_error(expr, "function `%s' parameter `%s' qualifiers "
-		       "don't match prototype", f->name, badvar);
-	 return;
-      }
-
-      if (sig->return_type != return_type) {
-	 ir_read_error(expr, "function `%s' return type doesn't "
-		       "match prototype", f->name);
-	 return;
-      }
-   } else {
-      /* No prototype for this body exists - skip it. */
-      state->symbols->pop_scope();
-      return;
-   }
-   assert(sig != NULL);
-
-   sig->replace_parameters(&hir_parameters);
-
-   if (!skip_body && !body_list->subexpressions.is_empty()) {
-      if (sig->is_defined) {
-	 ir_read_error(expr, "function %s redefined", f->name);
-	 return;
-      }
-      state->current_function = sig;
-      read_instructions(&sig->body, body_list, NULL);
-      state->current_function = NULL;
-      sig->is_defined = true;
-   }
-
-   state->symbols->pop_scope();
-}
-
-void
-ir_reader::read_instructions(exec_list *instructions, s_expression *expr,
-			     ir_loop *loop_ctx)
-{
-   // Read in a list of instructions
-   s_list *list = SX_AS_LIST(expr);
-   if (list == NULL) {
-      ir_read_error(expr, "Expected (<instruction> ...); found an atom.");
-      return;
-   }
-
-   foreach_iter(exec_list_iterator, it, list->subexpressions) {
-      s_expression *sub = (s_expression*) it.get();
-      ir_instruction *ir = read_instruction(sub, loop_ctx);
-      if (ir != NULL) {
-	 /* Global variable declarations should be moved to the top, before
-	  * any functions that might use them.  Functions are added to the
-	  * instruction stream when scanning for prototypes, so without this
-	  * hack, they always appear before variable declarations.
-	  */
-	 if (state->current_function == NULL && ir->as_variable() != NULL)
-	    instructions->push_head(ir);
-	 else
-	    instructions->push_tail(ir);
-      }
-   }
-}
-
-
-ir_instruction *
-ir_reader::read_instruction(s_expression *expr, ir_loop *loop_ctx)
-{
-   s_symbol *symbol = SX_AS_SYMBOL(expr);
-   if (symbol != NULL) {
-      if (strcmp(symbol->value(), "break") == 0 && loop_ctx != NULL)
-	 return new(mem_ctx) ir_loop_jump(ir_loop_jump::jump_break);
-      if (strcmp(symbol->value(), "continue") == 0 && loop_ctx != NULL)
-	 return new(mem_ctx) ir_loop_jump(ir_loop_jump::jump_continue);
-   }
-
-   s_list *list = SX_AS_LIST(expr);
-   if (list == NULL || list->subexpressions.is_empty()) {
-      ir_read_error(expr, "Invalid instruction.\n");
-      return NULL;
-   }
-
-   s_symbol *tag = SX_AS_SYMBOL(list->subexpressions.get_head());
-   if (tag == NULL) {
-      ir_read_error(expr, "expected instruction tag");
-      return NULL;
-   }
-
-   ir_instruction *inst = NULL;
-   if (strcmp(tag->value(), "declare") == 0) {
-      inst = read_declaration(list);
-   } else if (strcmp(tag->value(), "assign") == 0) {
-      inst = read_assignment(list);
-   } else if (strcmp(tag->value(), "if") == 0) {
-      inst = read_if(list, loop_ctx);
-   } else if (strcmp(tag->value(), "loop") == 0) {
-      inst = read_loop(list);
-   } else if (strcmp(tag->value(), "return") == 0) {
-      inst = read_return(list);
-   } else if (strcmp(tag->value(), "function") == 0) {
-      inst = read_function(list, false);
-   } else {
-      inst = read_rvalue(list);
-      if (inst == NULL)
-	 ir_read_error(NULL, "when reading instruction");
-   }
-   return inst;
-}
-
-ir_variable *
-ir_reader::read_declaration(s_expression *expr)
-{
-   s_list *s_quals;
-   s_expression *s_type;
-   s_symbol *s_name;
-
-   s_pattern pat[] = { "declare", s_quals, s_type, s_name };
-   if (!MATCH(expr, pat)) {
-      ir_read_error(expr, "expected (declare (<qualifiers>) <type> <name>)");
-      return NULL;
-   }
-
-   const glsl_type *type = read_type(s_type);
-   if (type == NULL)
-      return NULL;
-
-   ir_variable *var = new(mem_ctx) ir_variable(type, s_name->value(),
-					       ir_var_auto);
-
-   foreach_iter(exec_list_iterator, it, s_quals->subexpressions) {
-      s_symbol *qualifier = SX_AS_SYMBOL(it.get());
-      if (qualifier == NULL) {
-	 ir_read_error(expr, "qualifier list must contain only symbols");
-	 return NULL;
-      }
-
-      // FINISHME: Check for duplicate/conflicting qualifiers.
-      if (strcmp(qualifier->value(), "centroid") == 0) {
-	 var->centroid = 1;
-      } else if (strcmp(qualifier->value(), "invariant") == 0) {
-	 var->invariant = 1;
-      } else if (strcmp(qualifier->value(), "uniform") == 0) {
-	 var->mode = ir_var_uniform;
-      } else if (strcmp(qualifier->value(), "auto") == 0) {
-	 var->mode = ir_var_auto;
-      } else if (strcmp(qualifier->value(), "in") == 0) {
-	 var->mode = ir_var_in;
-      } else if (strcmp(qualifier->value(), "const_in") == 0) {
-	 var->mode = ir_var_const_in;
-      } else if (strcmp(qualifier->value(), "out") == 0) {
-	 var->mode = ir_var_out;
-      } else if (strcmp(qualifier->value(), "inout") == 0) {
-	 var->mode = ir_var_inout;
-      } else if (strcmp(qualifier->value(), "smooth") == 0) {
-	 var->interpolation = ir_var_smooth;
-      } else if (strcmp(qualifier->value(), "flat") == 0) {
-	 var->interpolation = ir_var_flat;
-      } else if (strcmp(qualifier->value(), "noperspective") == 0) {
-	 var->interpolation = ir_var_noperspective;
-      } else {
-	 ir_read_error(expr, "unknown qualifier: %s", qualifier->value());
-	 return NULL;
-      }
-   }
-
-   // Add the variable to the symbol table
-   state->symbols->add_variable(var);
-
-   return var;
-}
-
-
-ir_if *
-ir_reader::read_if(s_expression *expr, ir_loop *loop_ctx)
-{
-   s_expression *s_cond;
-   s_expression *s_then;
-   s_expression *s_else;
-
-   s_pattern pat[] = { "if", s_cond, s_then, s_else };
-   if (!MATCH(expr, pat)) {
-      ir_read_error(expr, "expected (if <condition> (<then>...) (<else>...))");
-      return NULL;
-   }
-
-   ir_rvalue *condition = read_rvalue(s_cond);
-   if (condition == NULL) {
-      ir_read_error(NULL, "when reading condition of (if ...)");
-      return NULL;
-   }
-
-   ir_if *iff = new(mem_ctx) ir_if(condition);
-
-   read_instructions(&iff->then_instructions, s_then, loop_ctx);
-   read_instructions(&iff->else_instructions, s_else, loop_ctx);
-   if (state->error) {
-      delete iff;
-      iff = NULL;
-   }
-   return iff;
-}
-
-
-ir_loop *
-ir_reader::read_loop(s_expression *expr)
-{
-   s_expression *s_counter, *s_from, *s_to, *s_inc, *s_body;
-
-   s_pattern pat[] = { "loop", s_counter, s_from, s_to, s_inc, s_body };
-   if (!MATCH(expr, pat)) {
-      ir_read_error(expr, "expected (loop <counter> <from> <to> "
-			  "<increment> <body>)");
-      return NULL;
-   }
-
-   // FINISHME: actually read the count/from/to fields.
-
-   ir_loop *loop = new(mem_ctx) ir_loop;
-   read_instructions(&loop->body_instructions, s_body, loop);
-   if (state->error) {
-      delete loop;
-      loop = NULL;
-   }
-   return loop;
-}
-
-
-ir_return *
-ir_reader::read_return(s_expression *expr)
-{
-   s_expression *s_retval;
-
-   s_pattern pat[] = { "return", s_retval};
-   if (!MATCH(expr, pat)) {
-      ir_read_error(expr, "expected (return <rvalue>)");
-      return NULL;
-   }
-
-   ir_rvalue *retval = read_rvalue(s_retval);
-   if (retval == NULL) {
-      ir_read_error(NULL, "when reading return value");
-      return NULL;
-   }
-
-   return new(mem_ctx) ir_return(retval);
-}
-
-
-ir_rvalue *
-ir_reader::read_rvalue(s_expression *expr)
-{
-   s_list *list = SX_AS_LIST(expr);
-   if (list == NULL || list->subexpressions.is_empty())
-      return NULL;
-
-   s_symbol *tag = SX_AS_SYMBOL(list->subexpressions.get_head());
-   if (tag == NULL) {
-      ir_read_error(expr, "expected rvalue tag");
-      return NULL;
-   }
-
-   ir_rvalue *rvalue = read_dereference(list);
-   if (rvalue != NULL || state->error)
-      return rvalue;
-   else if (strcmp(tag->value(), "swiz") == 0) {
-      rvalue = read_swizzle(list);
-   } else if (strcmp(tag->value(), "expression") == 0) {
-      rvalue = read_expression(list);
-   } else if (strcmp(tag->value(), "call") == 0) {
-      rvalue = read_call(list);
-   } else if (strcmp(tag->value(), "constant") == 0) {
-      rvalue = read_constant(list);
-   } else {
-      rvalue = read_texture(list);
-      if (rvalue == NULL && !state->error)
-	 ir_read_error(expr, "unrecognized rvalue tag: %s", tag->value());
-   }
-
-   return rvalue;
-}
-
-ir_assignment *
-ir_reader::read_assignment(s_expression *expr)
-{
-   s_expression *cond_expr = NULL;
-   s_expression *lhs_expr, *rhs_expr;
-   s_list       *mask_list;
-
-   s_pattern pat4[] = { "assign",            mask_list, lhs_expr, rhs_expr };
-   s_pattern pat5[] = { "assign", cond_expr, mask_list, lhs_expr, rhs_expr };
-   if (!MATCH(expr, pat4) && !MATCH(expr, pat5)) {
-      ir_read_error(expr, "expected (assign [<condition>] (<write mask>) "
-			  "<lhs> <rhs>)");
-      return NULL;
-   }
-
-   ir_rvalue *condition = NULL;
-   if (cond_expr != NULL) {
-      condition = read_rvalue(cond_expr);
-      if (condition == NULL) {
-	 ir_read_error(NULL, "when reading condition of assignment");
-	 return NULL;
-      }
-   }
-
-   unsigned mask = 0;
-
-   s_symbol *mask_symbol;
-   s_pattern mask_pat[] = { mask_symbol };
-   if (MATCH(mask_list, mask_pat)) {
-      const char *mask_str = mask_symbol->value();
-      unsigned mask_length = strlen(mask_str);
-      if (mask_length > 4) {
-	 ir_read_error(expr, "invalid write mask: %s", mask_str);
-	 return NULL;
-      }
-
-      const unsigned idx_map[] = { 3, 0, 1, 2 }; /* w=bit 3, x=0, y=1, z=2 */
-
-      for (unsigned i = 0; i < mask_length; i++) {
-	 if (mask_str[i] < 'w' || mask_str[i] > 'z') {
-	    ir_read_error(expr, "write mask contains invalid character: %c",
-			  mask_str[i]);
-	    return NULL;
-	 }
-	 mask |= 1 << idx_map[mask_str[i] - 'w'];
-      }
-   } else if (!mask_list->subexpressions.is_empty()) {
-      ir_read_error(mask_list, "expected () or (<write mask>)");
-      return NULL;
-   }
-
-   ir_dereference *lhs = read_dereference(lhs_expr);
-   if (lhs == NULL) {
-      ir_read_error(NULL, "when reading left-hand side of assignment");
-      return NULL;
-   }
-
-   ir_rvalue *rhs = read_rvalue(rhs_expr);
-   if (rhs == NULL) {
-      ir_read_error(NULL, "when reading right-hand side of assignment");
-      return NULL;
-   }
-
-   if (mask == 0 && (lhs->type->is_vector() || lhs->type->is_scalar())) {
-      ir_read_error(expr, "non-zero write mask required.");
-      return NULL;
-   }
-
-   return new(mem_ctx) ir_assignment(lhs, rhs, condition, mask);
-}
-
-ir_call *
-ir_reader::read_call(s_expression *expr)
-{
-   s_symbol *name;
-   s_list *params;
-
-   s_pattern pat[] = { "call", name, params };
-   if (!MATCH(expr, pat)) {
-      ir_read_error(expr, "expected (call <name> (<param> ...))");
-      return NULL;
-   }
-
-   exec_list parameters;
-
-   foreach_iter(exec_list_iterator, it, params->subexpressions) {
-      s_expression *expr = (s_expression*) it.get();
-      ir_rvalue *param = read_rvalue(expr);
-      if (param == NULL) {
-	 ir_read_error(expr, "when reading parameter to function call");
-	 return NULL;
-      }
-      parameters.push_tail(param);
-   }
-
-   ir_function *f = state->symbols->get_function(name->value());
-   if (f == NULL) {
-      ir_read_error(expr, "found call to undefined function %s",
-		    name->value());
-      return NULL;
-   }
-
-   ir_function_signature *callee = f->matching_signature(&parameters);
-   if (callee == NULL) {
-      ir_read_error(expr, "couldn't find matching signature for function "
-                    "%s", name->value());
-      return NULL;
-   }
-
-   return new(mem_ctx) ir_call(callee, &parameters);
-}
-
-ir_expression *
-ir_reader::read_expression(s_expression *expr)
-{
-   s_expression *s_type;
-   s_symbol *s_op;
-   s_expression *s_arg1;
-
-   s_pattern pat[] = { "expression", s_type, s_op, s_arg1 };
-   if (!PARTIAL_MATCH(expr, pat)) {
-      ir_read_error(expr, "expected (expression <type> <operator> "
-			  "<operand> [<operand>])");
-      return NULL;
-   }
-   s_expression *s_arg2 = (s_expression *) s_arg1->next; // may be tail sentinel
-
-   const glsl_type *type = read_type(s_type);
-   if (type == NULL)
-      return NULL;
-
-   /* Read the operator */
-   ir_expression_operation op = ir_expression::get_operator(s_op->value());
-   if (op == (ir_expression_operation) -1) {
-      ir_read_error(expr, "invalid operator: %s", s_op->value());
-      return NULL;
-   }
-    
-   unsigned num_operands = ir_expression::get_num_operands(op);
-   if (num_operands == 1 && !s_arg1->next->is_tail_sentinel()) {
-      ir_read_error(expr, "expected (expression <type> %s <operand>)",
-		    s_op->value());
-      return NULL;
-   }
-
-   ir_rvalue *arg1 = read_rvalue(s_arg1);
-   ir_rvalue *arg2 = NULL;
-   if (arg1 == NULL) {
-      ir_read_error(NULL, "when reading first operand of %s", s_op->value());
-      return NULL;
-   }
-
-   if (num_operands == 2) {
-      if (s_arg2->is_tail_sentinel() || !s_arg2->next->is_tail_sentinel()) {
-	 ir_read_error(expr, "expected (expression <type> %s <operand> "
-			     "<operand>)", s_op->value());
-	 return NULL;
-      }
-      arg2 = read_rvalue(s_arg2);
-      if (arg2 == NULL) {
-	 ir_read_error(NULL, "when reading second operand of %s",
-		       s_op->value());
-	 return NULL;
-      }
-   }
-
-   return new(mem_ctx) ir_expression(op, type, arg1, arg2);
-}
-
-ir_swizzle *
-ir_reader::read_swizzle(s_expression *expr)
-{
-   s_symbol *swiz;
-   s_expression *sub;
-
-   s_pattern pat[] = { "swiz", swiz, sub };
-   if (!MATCH(expr, pat)) {
-      ir_read_error(expr, "expected (swiz <swizzle> <rvalue>)");
-      return NULL;
-   }
-
-   if (strlen(swiz->value()) > 4) {
-      ir_read_error(expr, "expected a valid swizzle; found %s", swiz->value());
-      return NULL;
-   }
-
-   ir_rvalue *rvalue = read_rvalue(sub);
-   if (rvalue == NULL)
-      return NULL;
-
-   ir_swizzle *ir = ir_swizzle::create(rvalue, swiz->value(),
-				       rvalue->type->vector_elements);
-   if (ir == NULL)
-      ir_read_error(expr, "invalid swizzle");
-
-   return ir;
-}
-
-ir_constant *
-ir_reader::read_constant(s_expression *expr)
-{
-   s_expression *type_expr;
-   s_list *values;
-
-   s_pattern pat[] = { "constant", type_expr, values };
-   if (!MATCH(expr, pat)) {
-      ir_read_error(expr, "expected (constant <type> (...))");
-      return NULL;
-   }
-
-   const glsl_type *type = read_type(type_expr);
-   if (type == NULL)
-      return NULL;
-
-   if (values == NULL) {
-      ir_read_error(expr, "expected (constant <type> (...))");
-      return NULL;
-   }
-
-   if (type->is_array()) {
-      unsigned elements_supplied = 0;
-      exec_list elements;
-      foreach_iter(exec_list_iterator, it, values->subexpressions) {
-	 s_expression *elt = (s_expression *) it.get();
-	 ir_constant *ir_elt = read_constant(elt);
-	 if (ir_elt == NULL)
-	    return NULL;
-	 elements.push_tail(ir_elt);
-	 elements_supplied++;
-      }
-
-      if (elements_supplied != type->length) {
-	 ir_read_error(values, "expected exactly %u array elements, "
-		       "given %u", type->length, elements_supplied);
-	 return NULL;
-      }
-      return new(mem_ctx) ir_constant(type, &elements);
-   }
-
-   const glsl_type *const base_type = type->get_base_type();
-
-   ir_constant_data data = { { 0 } };
-
-   // Read in list of values (at most 16).
-   int k = 0;
-   foreach_iter(exec_list_iterator, it, values->subexpressions) {
-      if (k >= 16) {
-	 ir_read_error(values, "expected at most 16 numbers");
-	 return NULL;
-      }
-
-      s_expression *expr = (s_expression*) it.get();
-
-      if (base_type->base_type == GLSL_TYPE_FLOAT) {
-	 s_number *value = SX_AS_NUMBER(expr);
-	 if (value == NULL) {
-	    ir_read_error(values, "expected numbers");
-	    return NULL;
-	 }
-	 data.f[k] = value->fvalue();
-      } else {
-	 s_int *value = SX_AS_INT(expr);
-	 if (value == NULL) {
-	    ir_read_error(values, "expected integers");
-	    return NULL;
-	 }
-
-	 switch (base_type->base_type) {
-	 case GLSL_TYPE_UINT: {
-	    data.u[k] = value->value();
-	    break;
-	 }
-	 case GLSL_TYPE_INT: {
-	    data.i[k] = value->value();
-	    break;
-	 }
-	 case GLSL_TYPE_BOOL: {
-	    data.b[k] = value->value();
-	    break;
-	 }
-	 default:
-	    ir_read_error(values, "unsupported constant type");
-	    return NULL;
-	 }
-      }
-      ++k;
-   }
-
-   return new(mem_ctx) ir_constant(type, &data);
-}
-
-ir_dereference *
-ir_reader::read_dereference(s_expression *expr)
-{
-   s_symbol *s_var;
-   s_expression *s_subject;
-   s_expression *s_index;
-   s_symbol *s_field;
-
-   s_pattern var_pat[] = { "var_ref", s_var };
-   s_pattern array_pat[] = { "array_ref", s_subject, s_index };
-   s_pattern record_pat[] = { "record_ref", s_subject, s_field };
-
-   if (MATCH(expr, var_pat)) {
-      ir_variable *var = state->symbols->get_variable(s_var->value());
-      if (var == NULL) {
-	 ir_read_error(expr, "undeclared variable: %s", s_var->value());
-	 return NULL;
-      }
-      return new(mem_ctx) ir_dereference_variable(var);
-   } else if (MATCH(expr, array_pat)) {
-      ir_rvalue *subject = read_rvalue(s_subject);
-      if (subject == NULL) {
-	 ir_read_error(NULL, "when reading the subject of an array_ref");
-	 return NULL;
-      }
-
-      ir_rvalue *idx = read_rvalue(s_index);
-      if (subject == NULL) {
-	 ir_read_error(NULL, "when reading the index of an array_ref");
-	 return NULL;
-      }
-      return new(mem_ctx) ir_dereference_array(subject, idx);
-   } else if (MATCH(expr, record_pat)) {
-      ir_rvalue *subject = read_rvalue(s_subject);
-      if (subject == NULL) {
-	 ir_read_error(NULL, "when reading the subject of a record_ref");
-	 return NULL;
-      }
-      return new(mem_ctx) ir_dereference_record(subject, s_field->value());
-   }
-   return NULL;
-}
-
-ir_texture *
-ir_reader::read_texture(s_expression *expr)
-{
-   s_symbol *tag = NULL;
-   s_expression *s_sampler = NULL;
-   s_expression *s_coord = NULL;
-   s_expression *s_offset = NULL;
-   s_expression *s_proj = NULL;
-   s_list *s_shadow = NULL;
-   s_expression *s_lod = NULL;
-
-   ir_texture_opcode op = ir_tex; /* silence warning */
-
-   s_pattern tex_pattern[] =
-      { "tex", s_sampler, s_coord, s_offset, s_proj, s_shadow };
-   s_pattern txf_pattern[] =
-      { "txf", s_sampler, s_coord, s_offset, s_lod };
-   s_pattern other_pattern[] =
-      { tag, s_sampler, s_coord, s_offset, s_proj, s_shadow, s_lod };
-
-   if (MATCH(expr, tex_pattern)) {
-      op = ir_tex;
-   } else if (MATCH(expr, txf_pattern)) {
-      op = ir_txf;
-   } else if (MATCH(expr, other_pattern)) {
-      op = ir_texture::get_opcode(tag->value());
-      if (op == -1)
-	 return NULL;
-   } else {
-      ir_read_error(NULL, "unexpected texture pattern");
-      return NULL;
-   }
-
-   ir_texture *tex = new(mem_ctx) ir_texture(op);
-
-   // Read sampler (must be a deref)
-   ir_dereference *sampler = read_dereference(s_sampler);
-   if (sampler == NULL) {
-      ir_read_error(NULL, "when reading sampler in (%s ...)",
-		    tex->opcode_string());
-      return NULL;
-   }
-   tex->set_sampler(sampler);
-
-   // Read coordinate (any rvalue)
-   tex->coordinate = read_rvalue(s_coord);
-   if (tex->coordinate == NULL) {
-      ir_read_error(NULL, "when reading coordinate in (%s ...)",
-		    tex->opcode_string());
-      return NULL;
-   }
-
-   // Read texel offset - either 0 or an rvalue.
-   s_int *si_offset = SX_AS_INT(s_offset);
-   if (si_offset == NULL || si_offset->value() != 0) {
-      tex->offset = read_rvalue(s_offset);
-      if (tex->offset == NULL) {
-	 ir_read_error(s_offset, "expected 0 or an expression");
-	 return NULL;
-      }
-   }
-
-   if (op != ir_txf) {
-      s_int *proj_as_int = SX_AS_INT(s_proj);
-      if (proj_as_int && proj_as_int->value() == 1) {
-	 tex->projector = NULL;
-      } else {
-	 tex->projector = read_rvalue(s_proj);
-	 if (tex->projector == NULL) {
-	    ir_read_error(NULL, "when reading projective divide in (%s ..)",
-	                  tex->opcode_string());
-	    return NULL;
-	 }
-      }
-
-      if (s_shadow->subexpressions.is_empty()) {
-	 tex->shadow_comparitor = NULL;
-      } else {
-	 tex->shadow_comparitor = read_rvalue(s_shadow);
-	 if (tex->shadow_comparitor == NULL) {
-	    ir_read_error(NULL, "when reading shadow comparitor in (%s ..)",
-			  tex->opcode_string());
-	    return NULL;
-	 }
-      }
-   }
-
-   switch (op) {
-   case ir_txb:
-      tex->lod_info.bias = read_rvalue(s_lod);
-      if (tex->lod_info.bias == NULL) {
-	 ir_read_error(NULL, "when reading LOD bias in (txb ...)");
-	 return NULL;
-      }
-      break;
-   case ir_txl:
-   case ir_txf:
-      tex->lod_info.lod = read_rvalue(s_lod);
-      if (tex->lod_info.lod == NULL) {
-	 ir_read_error(NULL, "when reading LOD in (%s ...)",
-		       tex->opcode_string());
-	 return NULL;
-      }
-      break;
-   case ir_txd: {
-      s_expression *s_dx, *s_dy;
-      s_pattern dxdy_pat[] = { s_dx, s_dy };
-      if (!MATCH(s_lod, dxdy_pat)) {
-	 ir_read_error(s_lod, "expected (dPdx dPdy) in (txd ...)");
-	 return NULL;
-      }
-      tex->lod_info.grad.dPdx = read_rvalue(s_dx);
-      if (tex->lod_info.grad.dPdx == NULL) {
-	 ir_read_error(NULL, "when reading dPdx in (txd ...)");
-	 return NULL;
-      }
-      tex->lod_info.grad.dPdy = read_rvalue(s_dy);
-      if (tex->lod_info.grad.dPdy == NULL) {
-	 ir_read_error(NULL, "when reading dPdy in (txd ...)");
-	 return NULL;
-      }
-      break;
-   }
-   default:
-      // tex doesn't have any extra parameters.
-      break;
-   };
-   return tex;
-}
+/*

+ * Copyright © 2010 Intel Corporation

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the "Software"),

+ * to deal in the Software without restriction, including without limitation

+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,

+ * and/or sell copies of the Software, and to permit persons to whom the

+ * Software is furnished to do so, subject to the following conditions:

+ *

+ * The above copyright notice and this permission notice (including the next

+ * paragraph) shall be included in all copies or substantial portions of the

+ * Software.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

+ * DEALINGS IN THE SOFTWARE.

+ */

+

+#include "ir_reader.h"

+#include "glsl_parser_extras.h"

+#include "glsl_types.h"

+#include "s_expression.h"

+

+const static bool debug = false;

+

+class ir_reader {

+public:

+   ir_reader(_mesa_glsl_parse_state *);

+

+   void read(exec_list *instructions, const char *src, bool scan_for_protos);

+

+private:

+   void *mem_ctx;

+   _mesa_glsl_parse_state *state;

+

+   void ir_read_error(s_expression *, const char *fmt, ...);

+

+   const glsl_type *read_type(s_expression *);

+

+   void scan_for_prototypes(exec_list *, s_expression *);

+   ir_function *read_function(s_expression *, bool skip_body);

+   void read_function_sig(ir_function *, s_expression *, bool skip_body);

+

+   void read_instructions(exec_list *, s_expression *, ir_loop *);

+   ir_instruction *read_instruction(s_expression *, ir_loop *);

+   ir_variable *read_declaration(s_expression *);

+   ir_if *read_if(s_expression *, ir_loop *);

+   ir_loop *read_loop(s_expression *);

+   ir_return *read_return(s_expression *);

+   ir_rvalue *read_rvalue(s_expression *);

+   ir_assignment *read_assignment(s_expression *);

+   ir_expression *read_expression(s_expression *);

+   ir_call *read_call(s_expression *);

+   ir_swizzle *read_swizzle(s_expression *);

+   ir_constant *read_constant(s_expression *);

+   ir_texture *read_texture(s_expression *);

+

+   ir_dereference *read_dereference(s_expression *);

+};

+

+ir_reader::ir_reader(_mesa_glsl_parse_state *state) : state(state)

+{

+   this->mem_ctx = state;

+}

+

+void

+_mesa_glsl_read_ir(_mesa_glsl_parse_state *state, exec_list *instructions,

+		   const char *src, bool scan_for_protos)

+{

+   ir_reader r(state);

+   r.read(instructions, src, scan_for_protos);

+}

+

+void

+ir_reader::read(exec_list *instructions, const char *src, bool scan_for_protos)

+{

+   s_expression *expr = s_expression::read_expression(mem_ctx, src);

+   if (expr == NULL) {

+      ir_read_error(NULL, "couldn't parse S-Expression.");

+      return;

+   }

+   

+   if (scan_for_protos) {

+      scan_for_prototypes(instructions, expr);

+      if (state->error)

+	 return;

+   }

+

+   read_instructions(instructions, expr, NULL);

+   ralloc_free(expr);

+

+   if (debug)

+      validate_ir_tree(instructions);

+}

+

+void

+ir_reader::ir_read_error(s_expression *expr, const char *fmt, ...)

+{

+   va_list ap;

+

+   state->error = true;

+

+   if (state->current_function != NULL)

+      ralloc_asprintf_append(&state->info_log, "In function %s:\n",

+			     state->current_function->function_name());

+   ralloc_strcat(&state->info_log, "error: ");

+

+   va_start(ap, fmt);

+   ralloc_vasprintf_append(&state->info_log, fmt, ap);

+   va_end(ap);

+   ralloc_strcat(&state->info_log, "\n");

+

+   if (expr != NULL) {

+      ralloc_strcat(&state->info_log, "...in this context:\n   ");

+      expr->print();

+      ralloc_strcat(&state->info_log, "\n\n");

+   }

+}

+

+const glsl_type *

+ir_reader::read_type(s_expression *expr)

+{

+   s_expression *s_base_type;

+   s_int *s_size;

+

+   s_pattern pat[] = { "array", s_base_type, s_size };

+   if (MATCH(expr, pat)) {

+      const glsl_type *base_type = read_type(s_base_type);

+      if (base_type == NULL) {

+	 ir_read_error(NULL, "when reading base type of array type");

+	 return NULL;

+      }

+

+      return glsl_type::get_array_instance(base_type, s_size->value());

+   }

+   

+   s_symbol *type_sym = SX_AS_SYMBOL(expr);

+   if (type_sym == NULL) {

+      ir_read_error(expr, "expected <type>");

+      return NULL;

+   }

+

+   const glsl_type *type = state->symbols->get_type(type_sym->value());

+   if (type == NULL)

+      ir_read_error(expr, "invalid type: %s", type_sym->value());

+

+   return type;

+}

+

+

+void

+ir_reader::scan_for_prototypes(exec_list *instructions, s_expression *expr)

+{

+   s_list *list = SX_AS_LIST(expr);

+   if (list == NULL) {

+      ir_read_error(expr, "Expected (<instruction> ...); found an atom.");

+      return;

+   }

+

+   foreach_iter(exec_list_iterator, it, list->subexpressions) {

+      s_list *sub = SX_AS_LIST(it.get());

+      if (sub == NULL)

+	 continue; // not a (function ...); ignore it.

+

+      s_symbol *tag = SX_AS_SYMBOL(sub->subexpressions.get_head());

+      if (tag == NULL || strcmp(tag->value(), "function") != 0)

+	 continue; // not a (function ...); ignore it.

+

+      ir_function *f = read_function(sub, true);

+      if (f == NULL)

+	 return;

+      instructions->push_tail(f);

+   }

+}

+

+ir_function *

+ir_reader::read_function(s_expression *expr, bool skip_body)

+{

+   bool added = false;

+   s_symbol *name;

+

+   s_pattern pat[] = { "function", name };

+   if (!PARTIAL_MATCH(expr, pat)) {

+      ir_read_error(expr, "Expected (function <name> (signature ...) ...)");

+      return NULL;

+   }

+

+   ir_function *f = state->symbols->get_function(name->value());

+   if (f == NULL) {

+      f = new(mem_ctx) ir_function(name->value());

+      added = state->symbols->add_function(f);

+      assert(added);

+   }

+

+   exec_list_iterator it = ((s_list *) expr)->subexpressions.iterator();

+   it.next(); // skip "function" tag

+   it.next(); // skip function name

+   for (/* nothing */; it.has_next(); it.next()) {

+      s_expression *s_sig = (s_expression *) it.get();

+      read_function_sig(f, s_sig, skip_body);

+   }

+   return added ? f : NULL;

+}

+

+void

+ir_reader::read_function_sig(ir_function *f, s_expression *expr, bool skip_body)

+{

+   s_expression *type_expr;

+   s_list *paramlist;

+   s_list *body_list;

+

+   s_pattern pat[] = { "signature", type_expr, paramlist, body_list };

+   if (!MATCH(expr, pat)) {

+      ir_read_error(expr, "Expected (signature <type> (parameters ...) "

+			  "(<instruction> ...))");

+      return;

+   }

+

+   const glsl_type *return_type = read_type(type_expr);

+   if (return_type == NULL)

+      return;

+

+   s_symbol *paramtag = SX_AS_SYMBOL(paramlist->subexpressions.get_head());

+   if (paramtag == NULL || strcmp(paramtag->value(), "parameters") != 0) {

+      ir_read_error(paramlist, "Expected (parameters ...)");

+      return;

+   }

+

+   // Read the parameters list into a temporary place.

+   exec_list hir_parameters;

+   state->symbols->push_scope();

+

+   exec_list_iterator it = paramlist->subexpressions.iterator();

+   for (it.next() /* skip "parameters" */; it.has_next(); it.next()) {

+      ir_variable *var = read_declaration((s_expression *) it.get());

+      if (var == NULL)

+	 return;

+

+      hir_parameters.push_tail(var);

+   }

+

+   ir_function_signature *sig = f->exact_matching_signature(&hir_parameters);

+   if (sig == NULL && skip_body) {

+      /* If scanning for prototypes, generate a new signature. */

+      sig = new(mem_ctx) ir_function_signature(return_type);

+      sig->is_builtin = true;

+      f->add_signature(sig);

+   } else if (sig != NULL) {

+      const char *badvar = sig->qualifiers_match(&hir_parameters);

+      if (badvar != NULL) {

+	 ir_read_error(expr, "function `%s' parameter `%s' qualifiers "

+		       "don't match prototype", f->name, badvar);

+	 return;

+      }

+

+      if (sig->return_type != return_type) {

+	 ir_read_error(expr, "function `%s' return type doesn't "

+		       "match prototype", f->name);

+	 return;

+      }

+   } else {

+      /* No prototype for this body exists - skip it. */

+      state->symbols->pop_scope();

+      return;

+   }

+   assert(sig != NULL);

+

+   sig->replace_parameters(&hir_parameters);

+

+   if (!skip_body && !body_list->subexpressions.is_empty()) {

+      if (sig->is_defined) {

+	 ir_read_error(expr, "function %s redefined", f->name);

+	 return;

+      }

+      state->current_function = sig;

+      read_instructions(&sig->body, body_list, NULL);

+      state->current_function = NULL;

+      sig->is_defined = true;

+   }

+

+   state->symbols->pop_scope();

+}

+

+void

+ir_reader::read_instructions(exec_list *instructions, s_expression *expr,

+			     ir_loop *loop_ctx)

+{

+   // Read in a list of instructions

+   s_list *list = SX_AS_LIST(expr);

+   if (list == NULL) {

+      ir_read_error(expr, "Expected (<instruction> ...); found an atom.");

+      return;

+   }

+

+   foreach_iter(exec_list_iterator, it, list->subexpressions) {

+      s_expression *sub = (s_expression*) it.get();

+      ir_instruction *ir = read_instruction(sub, loop_ctx);

+      if (ir != NULL) {

+	 /* Global variable declarations should be moved to the top, before

+	  * any functions that might use them.  Functions are added to the

+	  * instruction stream when scanning for prototypes, so without this

+	  * hack, they always appear before variable declarations.

+	  */

+	 if (state->current_function == NULL && ir->as_variable() != NULL)

+	    instructions->push_head(ir);

+	 else

+	    instructions->push_tail(ir);

+      }

+   }

+}

+

+

+ir_instruction *

+ir_reader::read_instruction(s_expression *expr, ir_loop *loop_ctx)

+{

+   s_symbol *symbol = SX_AS_SYMBOL(expr);

+   if (symbol != NULL) {

+      if (strcmp(symbol->value(), "break") == 0 && loop_ctx != NULL)

+	 return new(mem_ctx) ir_loop_jump(ir_loop_jump::jump_break);

+      if (strcmp(symbol->value(), "continue") == 0 && loop_ctx != NULL)

+	 return new(mem_ctx) ir_loop_jump(ir_loop_jump::jump_continue);

+   }

+

+   s_list *list = SX_AS_LIST(expr);

+   if (list == NULL || list->subexpressions.is_empty()) {

+      ir_read_error(expr, "Invalid instruction.\n");

+      return NULL;

+   }

+

+   s_symbol *tag = SX_AS_SYMBOL(list->subexpressions.get_head());

+   if (tag == NULL) {

+      ir_read_error(expr, "expected instruction tag");

+      return NULL;

+   }

+

+   ir_instruction *inst = NULL;

+   if (strcmp(tag->value(), "declare") == 0) {

+      inst = read_declaration(list);

+   } else if (strcmp(tag->value(), "assign") == 0) {

+      inst = read_assignment(list);

+   } else if (strcmp(tag->value(), "if") == 0) {

+      inst = read_if(list, loop_ctx);

+   } else if (strcmp(tag->value(), "loop") == 0) {

+      inst = read_loop(list);

+   } else if (strcmp(tag->value(), "return") == 0) {

+      inst = read_return(list);

+   } else if (strcmp(tag->value(), "function") == 0) {

+      inst = read_function(list, false);

+   } else {

+      inst = read_rvalue(list);

+      if (inst == NULL)

+	 ir_read_error(NULL, "when reading instruction");

+   }

+   return inst;

+}

+

+ir_variable *

+ir_reader::read_declaration(s_expression *expr)

+{

+   s_list *s_quals;

+   s_expression *s_type;

+   s_symbol *s_name;

+

+   s_pattern pat[] = { "declare", s_quals, s_type, s_name };

+   if (!MATCH(expr, pat)) {

+      ir_read_error(expr, "expected (declare (<qualifiers>) <type> <name>)");

+      return NULL;

+   }

+

+   const glsl_type *type = read_type(s_type);

+   if (type == NULL)

+      return NULL;

+

+   ir_variable *var = new(mem_ctx) ir_variable(type, s_name->value(),

+					       ir_var_auto);

+

+   foreach_iter(exec_list_iterator, it, s_quals->subexpressions) {

+      s_symbol *qualifier = SX_AS_SYMBOL(it.get());

+      if (qualifier == NULL) {

+	 ir_read_error(expr, "qualifier list must contain only symbols");

+	 return NULL;

+      }

+

+      // FINISHME: Check for duplicate/conflicting qualifiers.

+      if (strcmp(qualifier->value(), "centroid") == 0) {

+	 var->centroid = 1;

+      } else if (strcmp(qualifier->value(), "invariant") == 0) {

+	 var->invariant = 1;

+      } else if (strcmp(qualifier->value(), "uniform") == 0) {

+	 var->mode = ir_var_uniform;

+      } else if (strcmp(qualifier->value(), "auto") == 0) {

+	 var->mode = ir_var_auto;

+      } else if (strcmp(qualifier->value(), "in") == 0) {

+	 var->mode = ir_var_in;

+      } else if (strcmp(qualifier->value(), "const_in") == 0) {

+	 var->mode = ir_var_const_in;

+      } else if (strcmp(qualifier->value(), "out") == 0) {

+	 var->mode = ir_var_out;

+      } else if (strcmp(qualifier->value(), "inout") == 0) {

+	 var->mode = ir_var_inout;

+      } else if (strcmp(qualifier->value(), "smooth") == 0) {

+	 var->interpolation = ir_var_smooth;

+      } else if (strcmp(qualifier->value(), "flat") == 0) {

+	 var->interpolation = ir_var_flat;

+      } else if (strcmp(qualifier->value(), "noperspective") == 0) {

+	 var->interpolation = ir_var_noperspective;

+      } else {

+	 ir_read_error(expr, "unknown qualifier: %s", qualifier->value());

+	 return NULL;

+      }

+   }

+

+   // Add the variable to the symbol table

+   state->symbols->add_variable(var);

+

+   return var;

+}

+

+

+ir_if *

+ir_reader::read_if(s_expression *expr, ir_loop *loop_ctx)

+{

+   s_expression *s_cond;

+   s_expression *s_then;

+   s_expression *s_else;

+

+   s_pattern pat[] = { "if", s_cond, s_then, s_else };

+   if (!MATCH(expr, pat)) {

+      ir_read_error(expr, "expected (if <condition> (<then>...) (<else>...))");

+      return NULL;

+   }

+

+   ir_rvalue *condition = read_rvalue(s_cond);

+   if (condition == NULL) {

+      ir_read_error(NULL, "when reading condition of (if ...)");

+      return NULL;

+   }

+

+   ir_if *iff = new(mem_ctx) ir_if(condition);

+

+   read_instructions(&iff->then_instructions, s_then, loop_ctx);

+   read_instructions(&iff->else_instructions, s_else, loop_ctx);

+   if (state->error) {

+      delete iff;

+      iff = NULL;

+   }

+   return iff;

+}

+

+

+ir_loop *

+ir_reader::read_loop(s_expression *expr)

+{

+   s_expression *s_counter, *s_from, *s_to, *s_inc, *s_body;

+

+   s_pattern pat[] = { "loop", s_counter, s_from, s_to, s_inc, s_body };

+   if (!MATCH(expr, pat)) {

+      ir_read_error(expr, "expected (loop <counter> <from> <to> "

+			  "<increment> <body>)");

+      return NULL;

+   }

+

+   // FINISHME: actually read the count/from/to fields.

+

+   ir_loop *loop = new(mem_ctx) ir_loop;

+   read_instructions(&loop->body_instructions, s_body, loop);

+   if (state->error) {

+      delete loop;

+      loop = NULL;

+   }

+   return loop;

+}

+

+

+ir_return *

+ir_reader::read_return(s_expression *expr)

+{

+   s_expression *s_retval;

+

+   s_pattern pat[] = { "return", s_retval};

+   if (!MATCH(expr, pat)) {

+      ir_read_error(expr, "expected (return <rvalue>)");

+      return NULL;

+   }

+

+   ir_rvalue *retval = read_rvalue(s_retval);

+   if (retval == NULL) {

+      ir_read_error(NULL, "when reading return value");

+      return NULL;

+   }

+

+   return new(mem_ctx) ir_return(retval);

+}

+

+

+ir_rvalue *

+ir_reader::read_rvalue(s_expression *expr)

+{

+   s_list *list = SX_AS_LIST(expr);

+   if (list == NULL || list->subexpressions.is_empty())

+      return NULL;

+

+   s_symbol *tag = SX_AS_SYMBOL(list->subexpressions.get_head());

+   if (tag == NULL) {

+      ir_read_error(expr, "expected rvalue tag");

+      return NULL;

+   }

+

+   ir_rvalue *rvalue = read_dereference(list);

+   if (rvalue != NULL || state->error)

+      return rvalue;

+   else if (strcmp(tag->value(), "swiz") == 0) {

+      rvalue = read_swizzle(list);

+   } else if (strcmp(tag->value(), "expression") == 0) {

+      rvalue = read_expression(list);

+   } else if (strcmp(tag->value(), "call") == 0) {

+      rvalue = read_call(list);

+   } else if (strcmp(tag->value(), "constant") == 0) {

+      rvalue = read_constant(list);

+   } else {

+      rvalue = read_texture(list);

+      if (rvalue == NULL && !state->error)

+	 ir_read_error(expr, "unrecognized rvalue tag: %s", tag->value());

+   }

+

+   return rvalue;

+}

+

+ir_assignment *

+ir_reader::read_assignment(s_expression *expr)

+{

+   s_expression *cond_expr = NULL;

+   s_expression *lhs_expr, *rhs_expr;

+   s_list       *mask_list;

+

+   s_pattern pat4[] = { "assign",            mask_list, lhs_expr, rhs_expr };

+   s_pattern pat5[] = { "assign", cond_expr, mask_list, lhs_expr, rhs_expr };

+   if (!MATCH(expr, pat4) && !MATCH(expr, pat5)) {

+      ir_read_error(expr, "expected (assign [<condition>] (<write mask>) "

+			  "<lhs> <rhs>)");

+      return NULL;

+   }

+

+   ir_rvalue *condition = NULL;

+   if (cond_expr != NULL) {

+      condition = read_rvalue(cond_expr);

+      if (condition == NULL) {

+	 ir_read_error(NULL, "when reading condition of assignment");

+	 return NULL;

+      }

+   }

+

+   unsigned mask = 0;

+

+   s_symbol *mask_symbol;

+   s_pattern mask_pat[] = { mask_symbol };

+   if (MATCH(mask_list, mask_pat)) {

+      const char *mask_str = mask_symbol->value();

+      unsigned mask_length = strlen(mask_str);

+      if (mask_length > 4) {

+	 ir_read_error(expr, "invalid write mask: %s", mask_str);

+	 return NULL;

+      }

+

+      const unsigned idx_map[] = { 3, 0, 1, 2 }; /* w=bit 3, x=0, y=1, z=2 */

+

+      for (unsigned i = 0; i < mask_length; i++) {

+	 if (mask_str[i] < 'w' || mask_str[i] > 'z') {

+	    ir_read_error(expr, "write mask contains invalid character: %c",

+			  mask_str[i]);

+	    return NULL;

+	 }

+	 mask |= 1 << idx_map[mask_str[i] - 'w'];

+      }

+   } else if (!mask_list->subexpressions.is_empty()) {

+      ir_read_error(mask_list, "expected () or (<write mask>)");

+      return NULL;

+   }

+

+   ir_dereference *lhs = read_dereference(lhs_expr);

+   if (lhs == NULL) {

+      ir_read_error(NULL, "when reading left-hand side of assignment");

+      return NULL;

+   }

+

+   ir_rvalue *rhs = read_rvalue(rhs_expr);

+   if (rhs == NULL) {

+      ir_read_error(NULL, "when reading right-hand side of assignment");

+      return NULL;

+   }

+

+   if (mask == 0 && (lhs->type->is_vector() || lhs->type->is_scalar())) {

+      ir_read_error(expr, "non-zero write mask required.");

+      return NULL;

+   }

+

+   return new(mem_ctx) ir_assignment(lhs, rhs, condition, mask);

+}

+

+ir_call *

+ir_reader::read_call(s_expression *expr)

+{

+   s_symbol *name;

+   s_list *params;

+

+   s_pattern pat[] = { "call", name, params };

+   if (!MATCH(expr, pat)) {

+      ir_read_error(expr, "expected (call <name> (<param> ...))");

+      return NULL;

+   }

+

+   exec_list parameters;

+

+   foreach_iter(exec_list_iterator, it, params->subexpressions) {

+      s_expression *expr = (s_expression*) it.get();

+      ir_rvalue *param = read_rvalue(expr);

+      if (param == NULL) {

+	 ir_read_error(expr, "when reading parameter to function call");

+	 return NULL;

+      }

+      parameters.push_tail(param);

+   }

+

+   ir_function *f = state->symbols->get_function(name->value());

+   if (f == NULL) {

+      ir_read_error(expr, "found call to undefined function %s",

+		    name->value());

+      return NULL;

+   }

+

+   ir_function_signature *callee = f->matching_signature(&parameters);

+   if (callee == NULL) {

+      ir_read_error(expr, "couldn't find matching signature for function "

+                    "%s", name->value());

+      return NULL;

+   }

+

+   return new(mem_ctx) ir_call(callee, &parameters);

+}

+

+ir_expression *

+ir_reader::read_expression(s_expression *expr)

+{

+   s_expression *s_type;

+   s_symbol *s_op;

+   s_expression *s_arg1;

+

+   s_pattern pat[] = { "expression", s_type, s_op, s_arg1 };

+   if (!PARTIAL_MATCH(expr, pat)) {

+      ir_read_error(expr, "expected (expression <type> <operator> "

+			  "<operand> [<operand>])");

+      return NULL;

+   }

+   s_expression *s_arg2 = (s_expression *) s_arg1->next; // may be tail sentinel

+

+   const glsl_type *type = read_type(s_type);

+   if (type == NULL)

+      return NULL;

+

+   /* Read the operator */

+   ir_expression_operation op = ir_expression::get_operator(s_op->value());

+   if (op == (ir_expression_operation) -1) {

+      ir_read_error(expr, "invalid operator: %s", s_op->value());

+      return NULL;

+   }

+    

+   unsigned num_operands = ir_expression::get_num_operands(op);

+   if (num_operands == 1 && !s_arg1->next->is_tail_sentinel()) {

+      ir_read_error(expr, "expected (expression <type> %s <operand>)",

+		    s_op->value());

+      return NULL;

+   }

+

+   ir_rvalue *arg1 = read_rvalue(s_arg1);

+   ir_rvalue *arg2 = NULL;

+   if (arg1 == NULL) {

+      ir_read_error(NULL, "when reading first operand of %s", s_op->value());

+      return NULL;

+   }

+

+   if (num_operands == 2) {

+      if (s_arg2->is_tail_sentinel() || !s_arg2->next->is_tail_sentinel()) {

+	 ir_read_error(expr, "expected (expression <type> %s <operand> "

+			     "<operand>)", s_op->value());

+	 return NULL;

+      }

+      arg2 = read_rvalue(s_arg2);

+      if (arg2 == NULL) {

+	 ir_read_error(NULL, "when reading second operand of %s",

+		       s_op->value());

+	 return NULL;

+      }

+   }

+

+   return new(mem_ctx) ir_expression(op, type, arg1, arg2);

+}

+

+ir_swizzle *

+ir_reader::read_swizzle(s_expression *expr)

+{

+   s_symbol *swiz;

+   s_expression *sub;

+

+   s_pattern pat[] = { "swiz", swiz, sub };

+   if (!MATCH(expr, pat)) {

+      ir_read_error(expr, "expected (swiz <swizzle> <rvalue>)");

+      return NULL;

+   }

+

+   if (strlen(swiz->value()) > 4) {

+      ir_read_error(expr, "expected a valid swizzle; found %s", swiz->value());

+      return NULL;

+   }

+

+   ir_rvalue *rvalue = read_rvalue(sub);

+   if (rvalue == NULL)

+      return NULL;

+

+   ir_swizzle *ir = ir_swizzle::create(rvalue, swiz->value(),

+				       rvalue->type->vector_elements);

+   if (ir == NULL)

+      ir_read_error(expr, "invalid swizzle");

+

+   return ir;

+}

+

+ir_constant *

+ir_reader::read_constant(s_expression *expr)

+{

+   s_expression *type_expr;

+   s_list *values;

+

+   s_pattern pat[] = { "constant", type_expr, values };

+   if (!MATCH(expr, pat)) {

+      ir_read_error(expr, "expected (constant <type> (...))");

+      return NULL;

+   }

+

+   const glsl_type *type = read_type(type_expr);

+   if (type == NULL)

+      return NULL;

+

+   if (values == NULL) {

+      ir_read_error(expr, "expected (constant <type> (...))");

+      return NULL;

+   }

+

+   if (type->is_array()) {

+      unsigned elements_supplied = 0;

+      exec_list elements;

+      foreach_iter(exec_list_iterator, it, values->subexpressions) {

+	 s_expression *elt = (s_expression *) it.get();

+	 ir_constant *ir_elt = read_constant(elt);

+	 if (ir_elt == NULL)

+	    return NULL;

+	 elements.push_tail(ir_elt);

+	 elements_supplied++;

+      }

+

+      if (elements_supplied != type->length) {

+	 ir_read_error(values, "expected exactly %u array elements, "

+		       "given %u", type->length, elements_supplied);

+	 return NULL;

+      }

+      return new(mem_ctx) ir_constant(type, &elements);

+   }

+

+   const glsl_type *const base_type = type->get_base_type();

+

+   ir_constant_data data = { { 0 } };

+

+   // Read in list of values (at most 16).

+   int k = 0;

+   foreach_iter(exec_list_iterator, it, values->subexpressions) {

+      if (k >= 16) {

+	 ir_read_error(values, "expected at most 16 numbers");

+	 return NULL;

+      }

+

+      s_expression *expr = (s_expression*) it.get();

+

+      if (base_type->base_type == GLSL_TYPE_FLOAT) {

+	 s_number *value = SX_AS_NUMBER(expr);

+	 if (value == NULL) {

+	    ir_read_error(values, "expected numbers");

+	    return NULL;

+	 }

+	 data.f[k] = value->fvalue();

+      } else {

+	 s_int *value = SX_AS_INT(expr);

+	 if (value == NULL) {

+	    ir_read_error(values, "expected integers");

+	    return NULL;

+	 }

+

+	 switch (base_type->base_type) {

+	 case GLSL_TYPE_UINT: {

+	    data.u[k] = value->value();

+	    break;

+	 }

+	 case GLSL_TYPE_INT: {

+	    data.i[k] = value->value();

+	    break;

+	 }

+	 case GLSL_TYPE_BOOL: {

+	    data.b[k] = value->value();

+	    break;

+	 }

+	 default:

+	    ir_read_error(values, "unsupported constant type");

+	    return NULL;

+	 }

+      }

+      ++k;

+   }

+

+   return new(mem_ctx) ir_constant(type, &data);

+}

+

+ir_dereference *

+ir_reader::read_dereference(s_expression *expr)

+{

+   s_symbol *s_var;

+   s_expression *s_subject;

+   s_expression *s_index;

+   s_symbol *s_field;

+

+   s_pattern var_pat[] = { "var_ref", s_var };

+   s_pattern array_pat[] = { "array_ref", s_subject, s_index };

+   s_pattern record_pat[] = { "record_ref", s_subject, s_field };

+

+   if (MATCH(expr, var_pat)) {

+      ir_variable *var = state->symbols->get_variable(s_var->value());

+      if (var == NULL) {

+	 ir_read_error(expr, "undeclared variable: %s", s_var->value());

+	 return NULL;

+      }

+      return new(mem_ctx) ir_dereference_variable(var);

+   } else if (MATCH(expr, array_pat)) {

+      ir_rvalue *subject = read_rvalue(s_subject);

+      if (subject == NULL) {

+	 ir_read_error(NULL, "when reading the subject of an array_ref");

+	 return NULL;

+      }

+

+      ir_rvalue *idx = read_rvalue(s_index);

+      if (subject == NULL) {

+	 ir_read_error(NULL, "when reading the index of an array_ref");

+	 return NULL;

+      }

+      return new(mem_ctx) ir_dereference_array(subject, idx);

+   } else if (MATCH(expr, record_pat)) {

+      ir_rvalue *subject = read_rvalue(s_subject);

+      if (subject == NULL) {

+	 ir_read_error(NULL, "when reading the subject of a record_ref");

+	 return NULL;

+      }

+      return new(mem_ctx) ir_dereference_record(subject, s_field->value());

+   }

+   return NULL;

+}

+

+ir_texture *

+ir_reader::read_texture(s_expression *expr)

+{

+   s_symbol *tag = NULL;

+   s_expression *s_type = NULL;

+   s_expression *s_sampler = NULL;

+   s_expression *s_coord = NULL;

+   s_expression *s_offset = NULL;

+   s_expression *s_proj = NULL;

+   s_list *s_shadow = NULL;

+   s_expression *s_lod = NULL;

+

+   ir_texture_opcode op = ir_tex; /* silence warning */

+

+   s_pattern tex_pattern[] =

+      { "tex", s_type, s_sampler, s_coord, s_offset, s_proj, s_shadow };

+   s_pattern txf_pattern[] =

+      { "txf", s_type, s_sampler, s_coord, s_offset, s_lod };

+   s_pattern other_pattern[] =

+      { tag, s_type, s_sampler, s_coord, s_offset, s_proj, s_shadow, s_lod };

+

+   if (MATCH(expr, tex_pattern)) {

+      op = ir_tex;

+   } else if (MATCH(expr, txf_pattern)) {

+      op = ir_txf;

+   } else if (MATCH(expr, other_pattern)) {

+      op = ir_texture::get_opcode(tag->value());

+      if (op == -1)

+	 return NULL;

+   } else {

+      ir_read_error(NULL, "unexpected texture pattern");

+      return NULL;

+   }

+

+   ir_texture *tex = new(mem_ctx) ir_texture(op);

+

+   // Read return type

+   const glsl_type *type = read_type(s_type);

+   if (type == NULL) {

+      ir_read_error(NULL, "when reading type in (%s ...)",

+		    tex->opcode_string());

+      return NULL;

+   }

+

+   // Read sampler (must be a deref)

+   ir_dereference *sampler = read_dereference(s_sampler);

+   if (sampler == NULL) {

+      ir_read_error(NULL, "when reading sampler in (%s ...)",

+		    tex->opcode_string());

+      return NULL;

+   }

+   tex->set_sampler(sampler, type);

+

+   // Read coordinate (any rvalue)

+   tex->coordinate = read_rvalue(s_coord);

+   if (tex->coordinate == NULL) {

+      ir_read_error(NULL, "when reading coordinate in (%s ...)",

+		    tex->opcode_string());

+      return NULL;

+   }

+

+   // Read texel offset - either 0 or an rvalue.

+   s_int *si_offset = SX_AS_INT(s_offset);

+   if (si_offset == NULL || si_offset->value() != 0) {

+      tex->offset = read_rvalue(s_offset);

+      if (tex->offset == NULL) {

+	 ir_read_error(s_offset, "expected 0 or an expression");

+	 return NULL;

+      }

+   }

+

+   if (op != ir_txf) {

+      s_int *proj_as_int = SX_AS_INT(s_proj);

+      if (proj_as_int && proj_as_int->value() == 1) {

+	 tex->projector = NULL;

+      } else {

+	 tex->projector = read_rvalue(s_proj);

+	 if (tex->projector == NULL) {

+	    ir_read_error(NULL, "when reading projective divide in (%s ..)",

+	                  tex->opcode_string());

+	    return NULL;

+	 }

+      }

+

+      if (s_shadow->subexpressions.is_empty()) {

+	 tex->shadow_comparitor = NULL;

+      } else {

+	 tex->shadow_comparitor = read_rvalue(s_shadow);

+	 if (tex->shadow_comparitor == NULL) {

+	    ir_read_error(NULL, "when reading shadow comparitor in (%s ..)",

+			  tex->opcode_string());

+	    return NULL;

+	 }

+      }

+   }

+

+   switch (op) {

+   case ir_txb:

+      tex->lod_info.bias = read_rvalue(s_lod);

+      if (tex->lod_info.bias == NULL) {

+	 ir_read_error(NULL, "when reading LOD bias in (txb ...)");

+	 return NULL;

+      }

+      break;

+   case ir_txl:

+   case ir_txf:

+      tex->lod_info.lod = read_rvalue(s_lod);

+      if (tex->lod_info.lod == NULL) {

+	 ir_read_error(NULL, "when reading LOD in (%s ...)",

+		       tex->opcode_string());

+	 return NULL;

+      }

+      break;

+   case ir_txd: {

+      s_expression *s_dx, *s_dy;

+      s_pattern dxdy_pat[] = { s_dx, s_dy };

+      if (!MATCH(s_lod, dxdy_pat)) {

+	 ir_read_error(s_lod, "expected (dPdx dPdy) in (txd ...)");

+	 return NULL;

+      }

+      tex->lod_info.grad.dPdx = read_rvalue(s_dx);

+      if (tex->lod_info.grad.dPdx == NULL) {

+	 ir_read_error(NULL, "when reading dPdx in (txd ...)");

+	 return NULL;

+      }

+      tex->lod_info.grad.dPdy = read_rvalue(s_dy);

+      if (tex->lod_info.grad.dPdy == NULL) {

+	 ir_read_error(NULL, "when reading dPdy in (txd ...)");

+	 return NULL;

+      }

+      break;

+   }

+   default:

+      // tex doesn't have any extra parameters.

+      break;

+   };

+   return tex;

+}

diff --git a/mesalib/src/glsl/opt_dead_functions.cpp b/mesalib/src/glsl/opt_dead_functions.cpp
index ceb79080a..3c3eb8904 100644
--- a/mesalib/src/glsl/opt_dead_functions.cpp
+++ b/mesalib/src/glsl/opt_dead_functions.cpp
@@ -1,153 +1,164 @@
- /*
-  * Copyright © 2010 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.
-  */
-
- /**
-  * \file opt_dead_functions.cpp
-  *
-  * Eliminates unused functions from the linked program.
-  */
-
- #include "ir.h"
- #include "ir_visitor.h"
- #include "ir_expression_flattening.h"
- #include "glsl_types.h"
-
- class signature_entry : public exec_node
- {
- public:
-    signature_entry(ir_function_signature *sig)
-    {
-       this->signature = sig;
-       this->used = false;
-    }
-
-    ir_function_signature *signature;
-    bool used;
- };
-
- class ir_dead_functions_visitor : public ir_hierarchical_visitor {
- public:
-    ir_dead_functions_visitor()
-    {
-       this->mem_ctx = ralloc_context(NULL);
-    }
-
-    ~ir_dead_functions_visitor()
-    {
-       ralloc_free(this->mem_ctx);
-    }
-
-    virtual ir_visitor_status visit_enter(ir_function_signature *);
-    virtual ir_visitor_status visit_enter(ir_call *);
-
-    signature_entry *get_signature_entry(ir_function_signature *var);
-
-    bool (*predicate)(ir_instruction *ir);
-
-    /* List of signature_entry */
-    exec_list signature_list;
-    void *mem_ctx;
- };
-
-
- signature_entry *
- ir_dead_functions_visitor::get_signature_entry(ir_function_signature *sig)
- {
-    foreach_iter(exec_list_iterator, iter, this->signature_list) {
-       signature_entry *entry = (signature_entry *)iter.get();
-       if (entry->signature == sig)
-	  return entry;
-    }
-
-    signature_entry *entry = new(mem_ctx) signature_entry(sig);
-    this->signature_list.push_tail(entry);
-    return entry;
- }
-
-
- ir_visitor_status
- ir_dead_functions_visitor::visit_enter(ir_function_signature *ir)
- {
-    signature_entry *entry = this->get_signature_entry(ir);
-
-    if (strcmp(ir->function_name(), "main") == 0) {
-       entry->used = true;
-    }
-
-    return visit_continue;
- }
-
-
- ir_visitor_status
- ir_dead_functions_visitor::visit_enter(ir_call *ir)
- {
-    signature_entry *entry = this->get_signature_entry(ir->get_callee());
-
-    entry->used = true;
-
-   return visit_continue;
-}
-
-bool
-do_dead_functions(exec_list *instructions)
-{
-   ir_dead_functions_visitor v;
-   bool progress = false;
-
-   visit_list_elements(&v, instructions);
-
-   /* Now that we've figured out which function signatures are used, remove
-    * the unused ones, and remove function definitions that have no more
-    * signatures.
-    */
-    foreach_iter(exec_list_iterator, iter, v.signature_list) {
-      signature_entry *entry = (signature_entry *)iter.get();
-
-      if (!entry->used) {
-	 entry->signature->remove();
-	 delete entry->signature;
-	 progress = true;
-      }
-      delete(entry);
-   }
-
-   /* We don't just do this above when we nuked a signature because of
-    * const pointers.
-    */
-   foreach_iter(exec_list_iterator, iter, *instructions) {
-      ir_instruction *ir = (ir_instruction *)iter.get();
-      ir_function *func = ir->as_function();
-
-      if (func && func->signatures.is_empty()) {
-	 /* At this point (post-linking), the symbol table is no
-	  * longer in use, so not removing the function from the
-	  * symbol table should be OK.
-	  */
-	 func->remove();
-	 delete func;
-	 progress = true;
-      }
-   }
-
-   return progress;
-}
+/*

+ * Copyright © 2010 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.

+ */

+

+/**

+ * \file opt_dead_functions.cpp

+ *

+ * Eliminates unused functions from the linked program.

+ */

+

+#include "ir.h"

+#include "ir_visitor.h"

+#include "ir_expression_flattening.h"

+#include "glsl_types.h"

+

+class signature_entry : public exec_node

+{

+public:

+   signature_entry(ir_function_signature *sig)

+   {

+      this->signature = sig;

+      this->used = false;

+   }

+

+   ir_function_signature *signature;

+   bool used;

+};

+

+class ir_dead_functions_visitor : public ir_hierarchical_visitor {

+public:

+   ir_dead_functions_visitor()

+   {

+      this->mem_ctx = ralloc_context(NULL);

+      this->seen_another_function_signature = false;

+   }

+

+   ~ir_dead_functions_visitor()

+   {

+      ralloc_free(this->mem_ctx);

+   }

+

+   virtual ir_visitor_status visit_enter(ir_function_signature *);

+   virtual ir_visitor_status visit_enter(ir_call *);

+

+   signature_entry *get_signature_entry(ir_function_signature *var);

+

+   bool (*predicate)(ir_instruction *ir);

+

+   bool seen_another_function_signature;

+

+   /* List of signature_entry */

+   exec_list signature_list;

+   void *mem_ctx;

+};

+

+

+signature_entry *

+ir_dead_functions_visitor::get_signature_entry(ir_function_signature *sig)

+{

+   foreach_iter(exec_list_iterator, iter, this->signature_list) {

+      signature_entry *entry = (signature_entry *)iter.get();

+      if (entry->signature == sig)

+	 return entry;

+   }

+

+   signature_entry *entry = new(mem_ctx) signature_entry(sig);

+   this->signature_list.push_tail(entry);

+   return entry;

+}

+

+

+ir_visitor_status

+ir_dead_functions_visitor::visit_enter(ir_function_signature *ir)

+{

+   signature_entry *entry = this->get_signature_entry(ir);

+

+   if (strcmp(ir->function_name(), "main") == 0) {

+      entry->used = true;

+   }

+

+   /* If this is the first signature to look at, no need to descend to see

+    * if it has calls to another function signature.

+    */

+   if (!this->seen_another_function_signature) {

+      this->seen_another_function_signature = true;

+      return visit_continue_with_parent;

+   }

+

+   return visit_continue;

+}

+

+

+ir_visitor_status

+ir_dead_functions_visitor::visit_enter(ir_call *ir)

+{

+   signature_entry *entry = this->get_signature_entry(ir->get_callee());

+

+   entry->used = true;

+

+   return visit_continue;

+}

+

+bool

+do_dead_functions(exec_list *instructions)

+{

+   ir_dead_functions_visitor v;

+   bool progress = false;

+

+   visit_list_elements(&v, instructions);

+

+   /* Now that we've figured out which function signatures are used, remove

+    * the unused ones, and remove function definitions that have no more

+    * signatures.

+    */

+    foreach_iter(exec_list_iterator, iter, v.signature_list) {

+      signature_entry *entry = (signature_entry *)iter.get();

+

+      if (!entry->used) {

+	 entry->signature->remove();

+	 delete entry->signature;

+	 progress = true;

+      }

+      delete(entry);

+   }

+

+   /* We don't just do this above when we nuked a signature because of

+    * const pointers.

+    */

+   foreach_iter(exec_list_iterator, iter, *instructions) {

+      ir_instruction *ir = (ir_instruction *)iter.get();

+      ir_function *func = ir->as_function();

+

+      if (func && func->signatures.is_empty()) {

+	 /* At this point (post-linking), the symbol table is no

+	  * longer in use, so not removing the function from the

+	  * symbol table should be OK.

+	  */

+	 func->remove();

+	 delete func;

+	 progress = true;

+      }

+   }

+

+   return progress;

+}

diff --git a/mesalib/src/glsl/opt_discard_simplification.cpp b/mesalib/src/glsl/opt_discard_simplification.cpp
index df8caba4d..37622eb02 100644
--- a/mesalib/src/glsl/opt_discard_simplification.cpp
+++ b/mesalib/src/glsl/opt_discard_simplification.cpp
@@ -95,6 +95,7 @@ public:
 

    ir_visitor_status visit_enter(ir_if *);

    ir_visitor_status visit_enter(ir_loop *);

+   ir_visitor_status visit_enter(ir_assignment *);

 

    bool progress;

 };

@@ -117,6 +118,15 @@ is_only_instruction(ir_discard *discard)
 	   discard->next->is_tail_sentinel());

 }

 

+/* We only care about the top level instructions, so don't descend

+ * into expressions.

+ */

+ir_visitor_status

+discard_simplifier::visit_enter(ir_assignment *ir)

+{

+   return visit_continue_with_parent;

+}

+

 ir_visitor_status

 discard_simplifier::visit_enter(ir_if *ir)

 {

diff --git a/mesalib/src/glsl/opt_if_simplification.cpp b/mesalib/src/glsl/opt_if_simplification.cpp
index ce94f42fe..2d8858e49 100644
--- a/mesalib/src/glsl/opt_if_simplification.cpp
+++ b/mesalib/src/glsl/opt_if_simplification.cpp
@@ -38,10 +38,20 @@ public:
    }

 

    ir_visitor_status visit_leave(ir_if *);

+   ir_visitor_status visit_enter(ir_assignment *);

 

    bool made_progress;

 };

 

+/* We only care about the top level "if" instructions, so don't

+ * descend into expressions.

+ */

+ir_visitor_status

+ir_if_simplification_visitor::visit_enter(ir_assignment *ir)

+{

+   return visit_continue_with_parent;

+}

+

 bool

 do_if_simplification(exec_list *instructions)

 {

diff --git a/mesalib/src/glsl/opt_redundant_jumps.cpp b/mesalib/src/glsl/opt_redundant_jumps.cpp
index edf4bb6c2..eb60519e2 100644
--- a/mesalib/src/glsl/opt_redundant_jumps.cpp
+++ b/mesalib/src/glsl/opt_redundant_jumps.cpp
@@ -1,111 +1,120 @@
-/*
- * Copyright © 2010 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.
- */
-
-/**
- * \file opt_redundant_jumps.cpp
- * Remove certain types of redundant jumps
- */
-
-#include "ir.h"
-
-class redundant_jumps_visitor : public ir_hierarchical_visitor {
-public:
-   redundant_jumps_visitor()
-   {
-      this->progress = false;
-   }
-
-   virtual ir_visitor_status visit_leave(ir_if *);
-   virtual ir_visitor_status visit_leave(ir_loop *);
-
-   bool progress;
-};
-
-
-ir_visitor_status
-redundant_jumps_visitor::visit_leave(ir_if *ir)
-{
-   /* If the last instruction in both branches is a 'break' or a 'continue',
-    * pull it out of the branches and insert it after the if-statment.  Note
-    * that both must be the same type (either 'break' or 'continue').
-    */
-   ir_instruction *const last_then =
-      (ir_instruction *) ir->then_instructions.get_tail();
-   ir_instruction *const last_else =
-      (ir_instruction *) ir->else_instructions.get_tail();
-
-   if ((last_then == NULL) || (last_else == NULL))
-      return visit_continue;
-
-   if ((last_then->ir_type != ir_type_loop_jump)
-       || (last_else->ir_type != ir_type_loop_jump))
-      return visit_continue;
-
-   ir_loop_jump *const then_jump = (ir_loop_jump *) last_then;
-   ir_loop_jump *const else_jump = (ir_loop_jump *) last_else;
-
-   if (then_jump->mode != else_jump->mode)
-      return visit_continue;
-
-   then_jump->remove();
-   else_jump->remove();
-   this->progress = true;
-
-   ir->insert_after(then_jump);
-
-   /* If both branchs of the if-statement are now empty, remove the
-    * if-statement.
-    */
-   if (ir->then_instructions.is_empty() && ir->else_instructions.is_empty())
-      ir->remove();
-
-   return visit_continue;
-}
-
-
-ir_visitor_status
-redundant_jumps_visitor::visit_leave(ir_loop *ir)
-{
-   /* If the last instruction of a loop body is a 'continue', remove it.
-    */
-   ir_instruction *const last =
-      (ir_instruction *) ir->body_instructions.get_tail();
-
-   if (last && (last->ir_type == ir_type_loop_jump)
-       && (((ir_loop_jump *) last)->mode == ir_loop_jump::jump_continue)) {
-      last->remove();
-      this->progress = true;
-   }
-
-   return visit_continue;
-}
-
-
-bool
-optimize_redundant_jumps(exec_list *instructions)
-{
-   redundant_jumps_visitor v;
-
-   v.run(instructions);
-   return v.progress;
-}
+/*

+ * Copyright © 2010 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.

+ */

+

+/**

+ * \file opt_redundant_jumps.cpp

+ * Remove certain types of redundant jumps

+ */

+

+#include "ir.h"

+

+class redundant_jumps_visitor : public ir_hierarchical_visitor {

+public:

+   redundant_jumps_visitor()

+   {

+      this->progress = false;

+   }

+

+   virtual ir_visitor_status visit_leave(ir_if *);

+   virtual ir_visitor_status visit_leave(ir_loop *);

+   virtual ir_visitor_status visit_enter(ir_assignment *);

+

+   bool progress;

+};

+

+/* We only care about the top level instructions, so don't descend

+ * into expressions.

+ */

+ir_visitor_status

+redundant_jumps_visitor::visit_enter(ir_assignment *ir)

+{

+   return visit_continue_with_parent;

+}

+

+ir_visitor_status

+redundant_jumps_visitor::visit_leave(ir_if *ir)

+{

+   /* If the last instruction in both branches is a 'break' or a 'continue',

+    * pull it out of the branches and insert it after the if-statment.  Note

+    * that both must be the same type (either 'break' or 'continue').

+    */

+   ir_instruction *const last_then =

+      (ir_instruction *) ir->then_instructions.get_tail();

+   ir_instruction *const last_else =

+      (ir_instruction *) ir->else_instructions.get_tail();

+

+   if ((last_then == NULL) || (last_else == NULL))

+      return visit_continue;

+

+   if ((last_then->ir_type != ir_type_loop_jump)

+       || (last_else->ir_type != ir_type_loop_jump))

+      return visit_continue;

+

+   ir_loop_jump *const then_jump = (ir_loop_jump *) last_then;

+   ir_loop_jump *const else_jump = (ir_loop_jump *) last_else;

+

+   if (then_jump->mode != else_jump->mode)

+      return visit_continue;

+

+   then_jump->remove();

+   else_jump->remove();

+   this->progress = true;

+

+   ir->insert_after(then_jump);

+

+   /* If both branchs of the if-statement are now empty, remove the

+    * if-statement.

+    */

+   if (ir->then_instructions.is_empty() && ir->else_instructions.is_empty())

+      ir->remove();

+

+   return visit_continue;

+}

+

+

+ir_visitor_status

+redundant_jumps_visitor::visit_leave(ir_loop *ir)

+{

+   /* If the last instruction of a loop body is a 'continue', remove it.

+    */

+   ir_instruction *const last =

+      (ir_instruction *) ir->body_instructions.get_tail();

+

+   if (last && (last->ir_type == ir_type_loop_jump)

+       && (((ir_loop_jump *) last)->mode == ir_loop_jump::jump_continue)) {

+      last->remove();

+      this->progress = true;

+   }

+

+   return visit_continue;

+}

+

+

+bool

+optimize_redundant_jumps(exec_list *instructions)

+{

+   redundant_jumps_visitor v;

+

+   v.run(instructions);

+   return v.progress;

+}

diff --git a/mesalib/src/glsl/opt_structure_splitting.cpp b/mesalib/src/glsl/opt_structure_splitting.cpp
index 014407c0b..d08a5cee1 100644
--- a/mesalib/src/glsl/opt_structure_splitting.cpp
+++ b/mesalib/src/glsl/opt_structure_splitting.cpp
@@ -1,361 +1,367 @@
-/*
- * Copyright © 2010 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.
- */
-
-/**
- * \file opt_structure_splitting.cpp
- *
- * If a structure is only ever referenced by its components, then
- * split those components out to individual variables so they can be
- * handled normally by other optimization passes.
- *
- * This skips structures like uniforms, which need to be accessible as
- * structures for their access by the GL.
- */
-
-#include "ir.h"
-#include "ir_visitor.h"
-#include "ir_print_visitor.h"
-#include "ir_rvalue_visitor.h"
-#include "glsl_types.h"
-
-static bool debug = false;
-
-// XXX using variable_entry2 here to avoid collision (MSVC multiply-defined
-// function) with the variable_entry class seen in ir_variable_refcount.h
-// Perhaps we can use the one in ir_variable_refcount.h and make this class
-// here go away?
-class variable_entry2 : public exec_node
-{
-public:
-   variable_entry2(ir_variable *var)
-   {
-      this->var = var;
-      this->whole_structure_access = 0;
-      this->declaration = false;
-      this->components = NULL;
-      this->mem_ctx = NULL;
-   }
-
-   ir_variable *var; /* The key: the variable's pointer. */
-
-   /** Number of times the variable is referenced, including assignments. */
-   unsigned whole_structure_access;
-
-   bool declaration; /* If the variable had a decl in the instruction stream */
-
-   ir_variable **components;
-
-   /** ralloc_parent(this->var) -- the shader's ralloc context. */
-   void *mem_ctx;
-};
-
-
-class ir_structure_reference_visitor : public ir_hierarchical_visitor {
-public:
-   ir_structure_reference_visitor(void)
-   {
-      this->mem_ctx = ralloc_context(NULL);
-      this->variable_list.make_empty();
-   }
-
-   ~ir_structure_reference_visitor(void)
-   {
-      ralloc_free(mem_ctx);
-   }
-
-   virtual ir_visitor_status visit(ir_variable *);
-   virtual ir_visitor_status visit(ir_dereference_variable *);
-   virtual ir_visitor_status visit_enter(ir_dereference_record *);
-   virtual ir_visitor_status visit_enter(ir_assignment *);
-   virtual ir_visitor_status visit_enter(ir_function_signature *);
-
-   variable_entry2 *get_variable_entry2(ir_variable *var);
-
-   /* List of variable_entry */
-   exec_list variable_list;
-
-   void *mem_ctx;
-};
-
-variable_entry2 *
-ir_structure_reference_visitor::get_variable_entry2(ir_variable *var)
-{
-   assert(var);
-
-   if (!var->type->is_record() || var->mode == ir_var_uniform)
-      return NULL;
-
-   foreach_iter(exec_list_iterator, iter, this->variable_list) {
-      variable_entry2 *entry = (variable_entry2 *)iter.get();
-      if (entry->var == var)
-	 return entry;
-   }
-
-   variable_entry2 *entry = new(mem_ctx) variable_entry2(var);
-   this->variable_list.push_tail(entry);
-   return entry;
-}
-
-
-ir_visitor_status
-ir_structure_reference_visitor::visit(ir_variable *ir)
-{
-   variable_entry2 *entry = this->get_variable_entry2(ir);
-
-   if (entry)
-      entry->declaration = true;
-
-   return visit_continue;
-}
-
-ir_visitor_status
-ir_structure_reference_visitor::visit(ir_dereference_variable *ir)
-{
-   ir_variable *const var = ir->variable_referenced();
-   variable_entry2 *entry = this->get_variable_entry2(var);
-
-   if (entry)
-      entry->whole_structure_access++;
-
-   return visit_continue;
-}
-
-ir_visitor_status
-ir_structure_reference_visitor::visit_enter(ir_dereference_record *ir)
-{
-   (void) ir;
-   /* Don't descend into the ir_dereference_variable below. */
-   return visit_continue_with_parent;
-}
-
-ir_visitor_status
-ir_structure_reference_visitor::visit_enter(ir_assignment *ir)
-{
-   if (ir->lhs->as_dereference_variable() &&
-       ir->rhs->as_dereference_variable() &&
-       !ir->condition) {
-      /* We'll split copies of a structure to copies of components, so don't
-       * descend to the ir_dereference_variables.
-       */
-      return visit_continue_with_parent;
-   }
-   return visit_continue;
-}
-
-ir_visitor_status
-ir_structure_reference_visitor::visit_enter(ir_function_signature *ir)
-{
-   /* We don't want to descend into the function parameters and
-    * dead-code eliminate them, so just accept the body here.
-    */
-   visit_list_elements(this, &ir->body);
-   return visit_continue_with_parent;
-}
-
-class ir_structure_splitting_visitor : public ir_rvalue_visitor {
-public:
-   ir_structure_splitting_visitor(exec_list *vars)
-   {
-      this->variable_list = vars;
-   }
-
-   virtual ~ir_structure_splitting_visitor()
-   {
-   }
-
-   virtual ir_visitor_status visit_leave(ir_assignment *);
-
-   void split_deref(ir_dereference **deref);
-   void handle_rvalue(ir_rvalue **rvalue);
-   variable_entry2 *get_splitting_entry(ir_variable *var);
-
-   exec_list *variable_list;
-   void *mem_ctx;
-};
-
-variable_entry2 *
-ir_structure_splitting_visitor::get_splitting_entry(ir_variable *var)
-{
-   assert(var);
-
-   if (!var->type->is_record())
-      return NULL;
-
-   foreach_iter(exec_list_iterator, iter, *this->variable_list) {
-      variable_entry2 *entry = (variable_entry2 *)iter.get();
-      if (entry->var == var) {
-	 return entry;
-      }
-   }
-
-   return NULL;
-}
-
-void
-ir_structure_splitting_visitor::split_deref(ir_dereference **deref)
-{
-   if ((*deref)->ir_type != ir_type_dereference_record)
-      return;
-
-   ir_dereference_record *deref_record = (ir_dereference_record *)*deref;
-   ir_dereference_variable *deref_var = deref_record->record->as_dereference_variable();
-   if (!deref_var)
-      return;
-
-   variable_entry2 *entry = get_splitting_entry(deref_var->var);
-   if (!entry)
-      return;
-
-   unsigned int i;
-   for (i = 0; i < entry->var->type->length; i++) {
-      if (strcmp(deref_record->field,
-		 entry->var->type->fields.structure[i].name) == 0)
-	 break;
-   }
-   assert(i != entry->var->type->length);
-
-   *deref = new(entry->mem_ctx) ir_dereference_variable(entry->components[i]);
-}
-
-void
-ir_structure_splitting_visitor::handle_rvalue(ir_rvalue **rvalue)
-{
-   if (!*rvalue)
-      return;
-
-   ir_dereference *deref = (*rvalue)->as_dereference();
-
-   if (!deref)
-      return;
-
-   split_deref(&deref);
-   *rvalue = deref;
-}
-
-ir_visitor_status
-ir_structure_splitting_visitor::visit_leave(ir_assignment *ir)
-{
-   ir_dereference_variable *lhs_deref = ir->lhs->as_dereference_variable();
-   ir_dereference_variable *rhs_deref = ir->rhs->as_dereference_variable();
-   variable_entry2 *lhs_entry = lhs_deref ? get_splitting_entry(lhs_deref->var) : NULL;
-   variable_entry2 *rhs_entry = rhs_deref ? get_splitting_entry(rhs_deref->var) : NULL;
-   const glsl_type *type = ir->rhs->type;
-
-   if ((lhs_entry || rhs_entry) && !ir->condition) {
-      for (unsigned int i = 0; i < type->length; i++) {
-	 ir_dereference *new_lhs, *new_rhs;
-	 void *mem_ctx = lhs_entry ? lhs_entry->mem_ctx : rhs_entry->mem_ctx;
-
-	 if (lhs_entry) {
-	    new_lhs = new(mem_ctx) ir_dereference_variable(lhs_entry->components[i]);
-	 } else {
-	    new_lhs = new(mem_ctx)
-	       ir_dereference_record(ir->lhs->clone(mem_ctx, NULL),
-				     type->fields.structure[i].name);
-	 }
-
-	 if (rhs_entry) {
-	    new_rhs = new(mem_ctx) ir_dereference_variable(rhs_entry->components[i]);
-	 } else {
-	    new_rhs = new(mem_ctx)
-	       ir_dereference_record(ir->rhs->clone(mem_ctx, NULL),
-				     type->fields.structure[i].name);
-	 }
-
-	 ir->insert_before(new(mem_ctx) ir_assignment(new_lhs,
-						      new_rhs,
-						      NULL));
-      }
-      ir->remove();
-   } else {
-      handle_rvalue(&ir->rhs);
-      split_deref(&ir->lhs);
-   }
-
-   handle_rvalue(&ir->condition);
-
-   return visit_continue;
-}
-
-bool
-do_structure_splitting(exec_list *instructions)
-{
-   ir_structure_reference_visitor refs;
-
-   visit_list_elements(&refs, instructions);
-
-   /* Trim out variables we can't split. */
-   foreach_iter(exec_list_iterator, iter, refs.variable_list) {
-      variable_entry2 *entry = (variable_entry2 *)iter.get();
-
-      if (debug) {
-	 printf("structure %s@%p: decl %d, whole_access %d\n",
-		entry->var->name, (void *) entry->var, entry->declaration,
-		entry->whole_structure_access);
-      }
-
-      if (!entry->declaration || entry->whole_structure_access) {
-	 entry->remove();
-      }
-   }
-
-   if (refs.variable_list.is_empty())
-      return false;
-
-   void *mem_ctx = ralloc_context(NULL);
-
-   /* Replace the decls of the structures to be split with their split
-    * components.
-    */
-   foreach_iter(exec_list_iterator, iter, refs.variable_list) {
-      variable_entry2 *entry = (variable_entry2 *)iter.get();
-      const struct glsl_type *type = entry->var->type;
-
-      entry->mem_ctx = ralloc_parent(entry->var);
-
-      entry->components = ralloc_array(mem_ctx,
-				       ir_variable *,
-				       type->length);
-
-      for (unsigned int i = 0; i < entry->var->type->length; i++) {
-	 const char *name = ralloc_asprintf(mem_ctx, "%s_%s",
-					    entry->var->name,
-					    type->fields.structure[i].name);
-
-	 entry->components[i] =
-	    new(entry->mem_ctx) ir_variable(type->fields.structure[i].type,
-					    name,
-					    ir_var_temporary);
-	 entry->var->insert_before(entry->components[i]);
-      }
-
-      entry->var->remove();
-   }
-
-   ir_structure_splitting_visitor split(&refs.variable_list);
-   visit_list_elements(&split, instructions);
-
-   ralloc_free(mem_ctx);
-
-   return true;
-}
+/*

+ * Copyright © 2010 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.

+ */

+

+/**

+ * \file opt_structure_splitting.cpp

+ *

+ * If a structure is only ever referenced by its components, then

+ * split those components out to individual variables so they can be

+ * handled normally by other optimization passes.

+ *

+ * This skips structures like uniforms, which need to be accessible as

+ * structures for their access by the GL.

+ */

+

+#include "ir.h"

+#include "ir_visitor.h"

+#include "ir_print_visitor.h"

+#include "ir_rvalue_visitor.h"

+#include "glsl_types.h"

+

+static bool debug = false;

+

+// XXX using variable_entry2 here to avoid collision (MSVC multiply-defined

+// function) with the variable_entry class seen in ir_variable_refcount.h

+// Perhaps we can use the one in ir_variable_refcount.h and make this class

+// here go away?

+class variable_entry2 : public exec_node

+{

+public:

+   variable_entry2(ir_variable *var)

+   {

+      this->var = var;

+      this->whole_structure_access = 0;

+      this->declaration = false;

+      this->components = NULL;

+      this->mem_ctx = NULL;

+   }

+

+   ir_variable *var; /* The key: the variable's pointer. */

+

+   /** Number of times the variable is referenced, including assignments. */

+   unsigned whole_structure_access;

+

+   bool declaration; /* If the variable had a decl in the instruction stream */

+

+   ir_variable **components;

+

+   /** ralloc_parent(this->var) -- the shader's ralloc context. */

+   void *mem_ctx;

+};

+

+

+class ir_structure_reference_visitor : public ir_hierarchical_visitor {

+public:

+   ir_structure_reference_visitor(void)

+   {

+      this->mem_ctx = ralloc_context(NULL);

+      this->variable_list.make_empty();

+   }

+

+   ~ir_structure_reference_visitor(void)

+   {

+      ralloc_free(mem_ctx);

+   }

+

+   virtual ir_visitor_status visit(ir_variable *);

+   virtual ir_visitor_status visit(ir_dereference_variable *);

+   virtual ir_visitor_status visit_enter(ir_dereference_record *);

+   virtual ir_visitor_status visit_enter(ir_assignment *);

+   virtual ir_visitor_status visit_enter(ir_function_signature *);

+

+   variable_entry2 *get_variable_entry2(ir_variable *var);

+

+   /* List of variable_entry */

+   exec_list variable_list;

+

+   void *mem_ctx;

+};

+

+variable_entry2 *

+ir_structure_reference_visitor::get_variable_entry2(ir_variable *var)

+{

+   assert(var);

+

+   if (!var->type->is_record() || var->mode == ir_var_uniform)

+      return NULL;

+

+   foreach_iter(exec_list_iterator, iter, this->variable_list) {

+      variable_entry2 *entry = (variable_entry2 *)iter.get();

+      if (entry->var == var)

+	 return entry;

+   }

+

+   variable_entry2 *entry = new(mem_ctx) variable_entry2(var);

+   this->variable_list.push_tail(entry);

+   return entry;

+}

+

+

+ir_visitor_status

+ir_structure_reference_visitor::visit(ir_variable *ir)

+{

+   variable_entry2 *entry = this->get_variable_entry2(ir);

+

+   if (entry)

+      entry->declaration = true;

+

+   return visit_continue;

+}

+

+ir_visitor_status

+ir_structure_reference_visitor::visit(ir_dereference_variable *ir)

+{

+   ir_variable *const var = ir->variable_referenced();

+   variable_entry2 *entry = this->get_variable_entry2(var);

+

+   if (entry)

+      entry->whole_structure_access++;

+

+   return visit_continue;

+}

+

+ir_visitor_status

+ir_structure_reference_visitor::visit_enter(ir_dereference_record *ir)

+{

+   (void) ir;

+   /* Don't descend into the ir_dereference_variable below. */

+   return visit_continue_with_parent;

+}

+

+ir_visitor_status

+ir_structure_reference_visitor::visit_enter(ir_assignment *ir)

+{

+   /* If there are no structure references yet, no need to bother with

+    * processing the expression tree.

+    */

+   if (this->variable_list.is_empty())

+      return visit_continue_with_parent;

+

+   if (ir->lhs->as_dereference_variable() &&

+       ir->rhs->as_dereference_variable() &&

+       !ir->condition) {

+      /* We'll split copies of a structure to copies of components, so don't

+       * descend to the ir_dereference_variables.

+       */

+      return visit_continue_with_parent;

+   }

+   return visit_continue;

+}

+

+ir_visitor_status

+ir_structure_reference_visitor::visit_enter(ir_function_signature *ir)

+{

+   /* We don't want to descend into the function parameters and

+    * dead-code eliminate them, so just accept the body here.

+    */

+   visit_list_elements(this, &ir->body);

+   return visit_continue_with_parent;

+}

+

+class ir_structure_splitting_visitor : public ir_rvalue_visitor {

+public:

+   ir_structure_splitting_visitor(exec_list *vars)

+   {

+      this->variable_list = vars;

+   }

+

+   virtual ~ir_structure_splitting_visitor()

+   {

+   }

+

+   virtual ir_visitor_status visit_leave(ir_assignment *);

+

+   void split_deref(ir_dereference **deref);

+   void handle_rvalue(ir_rvalue **rvalue);

+   variable_entry2 *get_splitting_entry(ir_variable *var);

+

+   exec_list *variable_list;

+   void *mem_ctx;

+};

+

+variable_entry2 *

+ir_structure_splitting_visitor::get_splitting_entry(ir_variable *var)

+{

+   assert(var);

+

+   if (!var->type->is_record())

+      return NULL;

+

+   foreach_iter(exec_list_iterator, iter, *this->variable_list) {

+      variable_entry2 *entry = (variable_entry2 *)iter.get();

+      if (entry->var == var) {

+	 return entry;

+      }

+   }

+

+   return NULL;

+}

+

+void

+ir_structure_splitting_visitor::split_deref(ir_dereference **deref)

+{

+   if ((*deref)->ir_type != ir_type_dereference_record)

+      return;

+

+   ir_dereference_record *deref_record = (ir_dereference_record *)*deref;

+   ir_dereference_variable *deref_var = deref_record->record->as_dereference_variable();

+   if (!deref_var)

+      return;

+

+   variable_entry2 *entry = get_splitting_entry(deref_var->var);

+   if (!entry)

+      return;

+

+   unsigned int i;

+   for (i = 0; i < entry->var->type->length; i++) {

+      if (strcmp(deref_record->field,

+		 entry->var->type->fields.structure[i].name) == 0)

+	 break;

+   }

+   assert(i != entry->var->type->length);

+

+   *deref = new(entry->mem_ctx) ir_dereference_variable(entry->components[i]);

+}

+

+void

+ir_structure_splitting_visitor::handle_rvalue(ir_rvalue **rvalue)

+{

+   if (!*rvalue)

+      return;

+

+   ir_dereference *deref = (*rvalue)->as_dereference();

+

+   if (!deref)

+      return;

+

+   split_deref(&deref);

+   *rvalue = deref;

+}

+

+ir_visitor_status

+ir_structure_splitting_visitor::visit_leave(ir_assignment *ir)

+{

+   ir_dereference_variable *lhs_deref = ir->lhs->as_dereference_variable();

+   ir_dereference_variable *rhs_deref = ir->rhs->as_dereference_variable();

+   variable_entry2 *lhs_entry = lhs_deref ? get_splitting_entry(lhs_deref->var) : NULL;

+   variable_entry2 *rhs_entry = rhs_deref ? get_splitting_entry(rhs_deref->var) : NULL;

+   const glsl_type *type = ir->rhs->type;

+

+   if ((lhs_entry || rhs_entry) && !ir->condition) {

+      for (unsigned int i = 0; i < type->length; i++) {

+	 ir_dereference *new_lhs, *new_rhs;

+	 void *mem_ctx = lhs_entry ? lhs_entry->mem_ctx : rhs_entry->mem_ctx;

+

+	 if (lhs_entry) {

+	    new_lhs = new(mem_ctx) ir_dereference_variable(lhs_entry->components[i]);

+	 } else {

+	    new_lhs = new(mem_ctx)

+	       ir_dereference_record(ir->lhs->clone(mem_ctx, NULL),

+				     type->fields.structure[i].name);

+	 }

+

+	 if (rhs_entry) {

+	    new_rhs = new(mem_ctx) ir_dereference_variable(rhs_entry->components[i]);

+	 } else {

+	    new_rhs = new(mem_ctx)

+	       ir_dereference_record(ir->rhs->clone(mem_ctx, NULL),

+				     type->fields.structure[i].name);

+	 }

+

+	 ir->insert_before(new(mem_ctx) ir_assignment(new_lhs,

+						      new_rhs,

+						      NULL));

+      }

+      ir->remove();

+   } else {

+      handle_rvalue(&ir->rhs);

+      split_deref(&ir->lhs);

+   }

+

+   handle_rvalue(&ir->condition);

+

+   return visit_continue;

+}

+

+bool

+do_structure_splitting(exec_list *instructions)

+{

+   ir_structure_reference_visitor refs;

+

+   visit_list_elements(&refs, instructions);

+

+   /* Trim out variables we can't split. */

+   foreach_iter(exec_list_iterator, iter, refs.variable_list) {

+      variable_entry2 *entry = (variable_entry2 *)iter.get();

+

+      if (debug) {

+	 printf("structure %s@%p: decl %d, whole_access %d\n",

+		entry->var->name, (void *) entry->var, entry->declaration,

+		entry->whole_structure_access);

+      }

+

+      if (!entry->declaration || entry->whole_structure_access) {

+	 entry->remove();

+      }

+   }

+

+   if (refs.variable_list.is_empty())

+      return false;

+

+   void *mem_ctx = ralloc_context(NULL);

+

+   /* Replace the decls of the structures to be split with their split

+    * components.

+    */

+   foreach_iter(exec_list_iterator, iter, refs.variable_list) {

+      variable_entry2 *entry = (variable_entry2 *)iter.get();

+      const struct glsl_type *type = entry->var->type;

+

+      entry->mem_ctx = ralloc_parent(entry->var);

+

+      entry->components = ralloc_array(mem_ctx,

+				       ir_variable *,

+				       type->length);

+

+      for (unsigned int i = 0; i < entry->var->type->length; i++) {

+	 const char *name = ralloc_asprintf(mem_ctx, "%s_%s",

+					    entry->var->name,

+					    type->fields.structure[i].name);

+

+	 entry->components[i] =

+	    new(entry->mem_ctx) ir_variable(type->fields.structure[i].type,

+					    name,

+					    ir_var_temporary);

+	 entry->var->insert_before(entry->components[i]);

+      }

+

+      entry->var->remove();

+   }

+

+   ir_structure_splitting_visitor split(&refs.variable_list);

+   visit_list_elements(&split, instructions);

+

+   ralloc_free(mem_ctx);

+

+   return true;

+}