glsl: move to compiler/

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

1 files changed, 0 insertions, 2632 deletions

diff --git a/src/glsl/ir.h b/src/glsl/ir.h
deleted file mode 100644
index bd7b5506343..00000000000
--- a/src/glsl/ir.h
+++ /dev/null
@@ -1,2632 +0,0 @@
-/* -*- 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 "util/ralloc.h"
-#include "compiler/glsl_types.h"
-#include "list.h"
-#include "ir_visitor.h"
-#include "ir_hierarchical_visitor.h"
-#include "main/mtypes.h"
-
-#ifdef __cplusplus
-
-/**
- * \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 {
-   ir_type_dereference_array,
-   ir_type_dereference_record,
-   ir_type_dereference_variable,
-   ir_type_constant,
-   ir_type_expression,
-   ir_type_swizzle,
-   ir_type_texture,
-   ir_type_variable,
-   ir_type_assignment,
-   ir_type_call,
-   ir_type_function,
-   ir_type_function_signature,
-   ir_type_if,
-   ir_type_loop,
-   ir_type_loop_jump,
-   ir_type_return,
-   ir_type_discard,
-   ir_type_emit_vertex,
-   ir_type_end_primitive,
-   ir_type_barrier,
-   ir_type_max, /**< maximum ir_type enum number, for validation */
-   ir_type_unset = ir_type_max
-};
-
-
-/**
- * Base class of all IR instructions
- */
-class ir_instruction : public exec_node {
-public:
-   enum ir_node_type ir_type;
-
-   /**
-    * GCC 4.7+ and clang warn when deleting an ir_instruction unless
-    * there's a virtual destructor present.  Because we almost
-    * universally use ralloc for our memory management of
-    * ir_instructions, the destructor doesn't need to do any work.
-    */
-   virtual ~ir_instruction()
-   {
-   }
-
-   /** ir_print_visitor helper for debugging. */
-   void print(void) const;
-   void fprint(FILE *f) 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;
-
-   bool is_rvalue() const
-   {
-      return ir_type == ir_type_dereference_array ||
-             ir_type == ir_type_dereference_record ||
-             ir_type == ir_type_dereference_variable ||
-             ir_type == ir_type_constant ||
-             ir_type == ir_type_expression ||
-             ir_type == ir_type_swizzle ||
-             ir_type == ir_type_texture;
-   }
-
-   bool is_dereference() const
-   {
-      return ir_type == ir_type_dereference_array ||
-             ir_type == ir_type_dereference_record ||
-             ir_type == ir_type_dereference_variable;
-   }
-
-   bool is_jump() const
-   {
-      return ir_type == ir_type_loop_jump ||
-             ir_type == ir_type_return ||
-             ir_type == ir_type_discard;
-   }
-
-   /**
-    * \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.
-    */
-   /*@{*/
-   #define AS_BASE(TYPE)                                \
-   class ir_##TYPE *as_##TYPE()                         \
-   {                                                    \
-      assume(this != NULL);                             \
-      return is_##TYPE() ? (ir_##TYPE *) this : NULL;   \
-   }                                                    \
-   const class ir_##TYPE *as_##TYPE() const             \
-   {                                                    \
-      assume(this != NULL);                             \
-      return is_##TYPE() ? (ir_##TYPE *) this : NULL;   \
-   }
-
-   AS_BASE(rvalue)
-   AS_BASE(dereference)
-   AS_BASE(jump)
-   #undef AS_BASE
-
-   #define AS_CHILD(TYPE) \
-   class ir_##TYPE * as_##TYPE() \
-   { \
-      assume(this != NULL);                                         \
-      return ir_type == ir_type_##TYPE ? (ir_##TYPE *) this : NULL; \
-   }                                                                      \
-   const class ir_##TYPE * as_##TYPE() const                              \
-   {                                                                      \
-      assume(this != NULL);                                               \
-      return ir_type == ir_type_##TYPE ? (const ir_##TYPE *) this : NULL; \
-   }
-   AS_CHILD(variable)
-   AS_CHILD(function)
-   AS_CHILD(dereference_array)
-   AS_CHILD(dereference_variable)
-   AS_CHILD(dereference_record)
-   AS_CHILD(expression)
-   AS_CHILD(loop)
-   AS_CHILD(assignment)
-   AS_CHILD(call)
-   AS_CHILD(return)
-   AS_CHILD(if)
-   AS_CHILD(swizzle)
-   AS_CHILD(texture)
-   AS_CHILD(constant)
-   AS_CHILD(discard)
-   #undef AS_CHILD
-   /*@}*/
-
-   /**
-    * IR equality method: Return true if the referenced instruction would
-    * return the same value as this one.
-    *
-    * This intended to be used for CSE and algebraic optimizations, on rvalues
-    * in particular.  No support for other instruction types (assignments,
-    * jumps, calls, etc.) is planned.
-    */
-   virtual bool equals(const ir_instruction *ir,
-                       enum ir_node_type ignore = ir_type_unset) const;
-
-protected:
-   ir_instruction(enum ir_node_type t)
-      : ir_type(t)
-   {
-   }
-
-private:
-   ir_instruction()
-   {
-      assert(!"Should not get here.");
-   }
-};
-
-
-/**
- * The base class for all "values"/expression trees.
- */
-class ir_rvalue : public ir_instruction {
-public:
-   const struct glsl_type *type;
-
-   virtual ir_rvalue *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 *);
-
-   virtual ir_constant *constant_expression_value(struct hash_table *variable_context = NULL);
-
-   ir_rvalue *as_rvalue_to_saturate();
-
-   virtual bool is_lvalue() const
-   {
-      return false;
-   }
-
-   /**
-    * Get the variable that is ultimately referenced by an r-value
-    */
-   virtual ir_variable *variable_referenced() const
-   {
-      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 types, 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;
-
-   /**
-    * Determine if an r-value is an unsigned integer constant which can be
-    * stored in 16 bits.
-    *
-    * \sa ir_constant::is_uint16_constant.
-    */
-   virtual bool is_uint16_constant() const { return false; }
-
-   /**
-    * Return a generic value of error_type.
-    *
-    * Allocation will be performed with 'mem_ctx' as ralloc owner.
-    */
-   static ir_rvalue *error_value(void *mem_ctx);
-
-protected:
-   ir_rvalue(enum ir_node_type t);
-};
-
-
-/**
- * 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_shader_storage,       /**< Variable declared as an ssbo. */
-   ir_var_shader_shared,        /**< Variable declared as shared. */
-   ir_var_shader_in,
-   ir_var_shader_out,
-   ir_var_function_in,
-   ir_var_function_out,
-   ir_var_function_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. */
-   ir_var_mode_count            /**< Number of variable modes */
-};
-
-/**
- * Enum keeping track of how a variable was declared.  For error checking of
- * the gl_PerVertex redeclaration rules.
- */
-enum ir_var_declaration_type {
-   /**
-    * Normal declaration (for most variables, this means an explicit
-    * declaration.  Exception: temporaries are always implicitly declared, but
-    * they still use ir_var_declared_normally).
-    *
-    * Note: an ir_variable that represents a named interface block uses
-    * ir_var_declared_normally.
-    */
-   ir_var_declared_normally = 0,
-
-   /**
-    * Variable was explicitly declared (or re-declared) in an unnamed
-    * interface block.
-    */
-   ir_var_declared_in_block,
-
-   /**
-    * Variable is an implicitly declared built-in that has not been explicitly
-    * re-declared by the shader.
-    */
-   ir_var_declared_implicitly,
-
-   /**
-    * Variable is implicitly generated by the compiler and should not be
-    * visible via the API.
-    */
-   ir_var_hidden,
-};
-
-/**
- * \brief Layout qualifiers for gl_FragDepth.
- *
- * The AMD/ARB_conservative_depth extensions allow 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);
-
-/**
- * Description of built-in state associated with a uniform
- *
- * \sa ir_variable::state_slots
- */
-struct ir_state_slot {
-   int tokens[5];
-   int swizzle;
-};
-
-
-/**
- * Get the string value for an interpolation qualifier
- *
- * \return The string that would be used in a shader to specify \c
- * mode will be returned.
- *
- * This function is used to generate error messages of the form "shader
- * uses %s interpolation qualifier", so in the case where there is no
- * interpolation qualifier, it returns "no".
- *
- * This function should only be used on a shader input or output variable.
- */
-const char *interpolation_string(unsigned interpolation);
-
-
-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 void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-
-   /**
-    * Determine how this variable should be interpolated based on its
-    * interpolation qualifier (if present), whether it is gl_Color or
-    * gl_SecondaryColor, and whether flatshading is enabled in the current GL
-    * state.
-    *
-    * The return value will always be either INTERP_QUALIFIER_SMOOTH,
-    * INTERP_QUALIFIER_NOPERSPECTIVE, or INTERP_QUALIFIER_FLAT.
-    */
-   glsl_interp_qualifier determine_interpolation_mode(bool flat_shade);
-
-   /**
-    * Determine whether or not a variable is part of a uniform or
-    * shader storage block.
-    */
-   inline bool is_in_buffer_block() const
-   {
-      return (this->data.mode == ir_var_uniform ||
-              this->data.mode == ir_var_shader_storage) &&
-             this->interface_type != NULL;
-   }
-
-   /**
-    * Determine whether or not a variable is part of a shader storage block.
-    */
-   inline bool is_in_shader_storage_block() const
-   {
-      return this->data.mode == ir_var_shader_storage &&
-             this->interface_type != NULL;
-   }
-
-   /**
-    * Determine whether or not a variable is the declaration of an interface
-    * block
-    *
-    * For the first declaration below, there will be an \c ir_variable named
-    * "instance" whose type and whose instance_type will be the same
-    *  \cglsl_type.  For the second declaration, there will be an \c ir_variable
-    * named "f" whose type is float and whose instance_type is B2.
-    *
-    * "instance" is an interface instance variable, but "f" is not.
-    *
-    * uniform B1 {
-    *     float f;
-    * } instance;
-    *
-    * uniform B2 {
-    *     float f;
-    * };
-    */
-   inline bool is_interface_instance() const
-   {
-      return this->type->without_array() == this->interface_type;
-   }
-
-   /**
-    * Set this->interface_type on a newly created variable.
-    */
-   void init_interface_type(const struct glsl_type *type)
-   {
-      assert(this->interface_type == NULL);
-      this->interface_type = type;
-      if (this->is_interface_instance()) {
-         this->u.max_ifc_array_access =
-            rzalloc_array(this, unsigned, type->length);
-      }
-   }
-
-   /**
-    * Change this->interface_type on a variable that previously had a
-    * different, but compatible, interface_type.  This is used during linking
-    * to set the size of arrays in interface blocks.
-    */
-   void change_interface_type(const struct glsl_type *type)
-   {
-      if (this->u.max_ifc_array_access != NULL) {
-         /* max_ifc_array_access has already been allocated, so make sure the
-          * new interface has the same number of fields as the old one.
-          */
-         assert(this->interface_type->length == type->length);
-      }
-      this->interface_type = type;
-   }
-
-   /**
-    * Change this->interface_type on a variable that previously had a
-    * different, and incompatible, interface_type. This is used during
-    * compilation to handle redeclaration of the built-in gl_PerVertex
-    * interface block.
-    */
-   void reinit_interface_type(const struct glsl_type *type)
-   {
-      if (this->u.max_ifc_array_access != NULL) {
-#ifndef NDEBUG
-         /* Redeclaring gl_PerVertex is only allowed if none of the built-ins
-          * it defines have been accessed yet; so it's safe to throw away the
-          * old max_ifc_array_access pointer, since all of its values are
-          * zero.
-          */
-         for (unsigned i = 0; i < this->interface_type->length; i++)
-            assert(this->u.max_ifc_array_access[i] == 0);
-#endif
-         ralloc_free(this->u.max_ifc_array_access);
-         this->u.max_ifc_array_access = NULL;
-      }
-      this->interface_type = NULL;
-      init_interface_type(type);
-   }
-
-   const glsl_type *get_interface_type() const
-   {
-      return this->interface_type;
-   }
-
-   /**
-    * Get the max_ifc_array_access pointer
-    *
-    * A "set" function is not needed because the array is dynmically allocated
-    * as necessary.
-    */
-   inline unsigned *get_max_ifc_array_access()
-   {
-      assert(this->data._num_state_slots == 0);
-      return this->u.max_ifc_array_access;
-   }
-
-   inline unsigned get_num_state_slots() const
-   {
-      assert(!this->is_interface_instance()
-             || this->data._num_state_slots == 0);
-      return this->data._num_state_slots;
-   }
-
-   inline void set_num_state_slots(unsigned n)
-   {
-      assert(!this->is_interface_instance()
-             || n == 0);
-      this->data._num_state_slots = n;
-   }
-
-   inline ir_state_slot *get_state_slots()
-   {
-      return this->is_interface_instance() ? NULL : this->u.state_slots;
-   }
-
-   inline const ir_state_slot *get_state_slots() const
-   {
-      return this->is_interface_instance() ? NULL : this->u.state_slots;
-   }
-
-   inline ir_state_slot *allocate_state_slots(unsigned n)
-   {
-      assert(!this->is_interface_instance());
-
-      this->u.state_slots = ralloc_array(this, ir_state_slot, n);
-      this->data._num_state_slots = 0;
-
-      if (this->u.state_slots != NULL)
-         this->data._num_state_slots = n;
-
-      return this->u.state_slots;
-   }
-
-   inline bool is_name_ralloced() const
-   {
-      return this->name != ir_variable::tmp_name;
-   }
-
-   /**
-    * Enable emitting extension warnings for this variable
-    */
-   void enable_extension_warning(const char *extension);
-
-   /**
-    * Get the extension warning string for this variable
-    *
-    * If warnings are not enabled, \c NULL is returned.
-    */
-   const char *get_extension_warning() const;
-
-   /**
-    * Declared type of the variable
-    */
-   const struct glsl_type *type;
-
-   /**
-    * Declared name of the variable
-    */
-   const char *name;
-
-   struct ir_variable_data {
-
-      /**
-       * Is the variable read-only?
-       *
-       * This is set for variables declared as \c const, shader inputs,
-       * and uniforms.
-       */
-      unsigned read_only:1;
-      unsigned centroid:1;
-      unsigned sample:1;
-      unsigned patch:1;
-      unsigned invariant:1;
-      unsigned precise: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.
-       *
-       * This is only maintained in the ast_to_hir.cpp path, not in
-       * Mesa's fixed function or ARB program paths.
-       */
-      unsigned used:1;
-
-      /**
-       * Has this variable been statically assigned?
-       *
-       * This answers whether the variable was assigned in any path of
-       * the shader during ast_to_hir.  This doesn't answer whether it is
-       * still written after dead code removal, nor is it maintained in
-       * non-ast_to_hir.cpp (GLSL parsing) paths.
-       */
-      unsigned assigned:1;
-
-      /**
-       * When separate shader programs are enabled, only input/outputs between
-       * the stages of a multi-stage separate program can be safely removed
-       * from the shader interface. Other input/outputs must remains active.
-       */
-      unsigned always_active_io:1;
-
-      /**
-       * Enum indicating how the variable was declared.  See
-       * ir_var_declaration_type.
-       *
-       * This is used to detect certain kinds of illegal variable redeclarations.
-       */
-      unsigned how_declared:2;
-
-      /**
-       * Storage class of the variable.
-       *
-       * \sa ir_variable_mode
-       */
-      unsigned mode:4;
-
-      /**
-       * Interpolation mode for shader inputs / outputs
-       *
-       * \sa ir_variable_interpolation
-       */
-      unsigned interpolation:2;
-
-      /**
-       * \name ARB_fragment_coord_conventions
-       * @{
-       */
-      unsigned origin_upper_left:1;
-      unsigned pixel_center_integer:1;
-      /*@}*/
-
-      /**
-       * Was the location explicitly set in the shader?
-       *
-       * If the location is explicitly set in the shader, it \b cannot be changed
-       * by the linker or by the API (e.g., calls to \c glBindAttribLocation have
-       * no effect).
-       */
-      unsigned explicit_location:1;
-      unsigned explicit_index:1;
-
-      /**
-       * Was an initial binding explicitly set in the shader?
-       *
-       * If so, constant_value contains an integer ir_constant representing the
-       * initial binding point.
-       */
-      unsigned explicit_binding:1;
-
-      /**
-       * Does this variable have an initializer?
-       *
-       * This is used by the linker to cross-validiate initializers of global
-       * variables.
-       */
-      unsigned has_initializer:1;
-
-      /**
-       * Is this variable a generic output or input that has not yet been matched
-       * up to a variable in another stage of the pipeline?
-       *
-       * This is used by the linker as scratch storage while assigning locations
-       * to generic inputs and outputs.
-       */
-      unsigned is_unmatched_generic_inout:1;
-
-      /**
-       * If non-zero, then this variable may be packed along with other variables
-       * into a single varying slot, so this offset should be applied when
-       * accessing components.  For example, an offset of 1 means that the x
-       * component of this variable is actually stored in component y of the
-       * location specified by \c location.
-       */
-      unsigned location_frac:2;
-
-      /**
-       * Layout of the matrix.  Uses glsl_matrix_layout values.
-       */
-      unsigned matrix_layout:2;
-
-      /**
-       * Non-zero if this variable was created by lowering a named interface
-       * block which was not an array.
-       *
-       * Note that this variable and \c from_named_ifc_block_array will never
-       * both be non-zero.
-       */
-      unsigned from_named_ifc_block_nonarray:1;
-
-      /**
-       * Non-zero if this variable was created by lowering a named interface
-       * block which was an array.
-       *
-       * Note that this variable and \c from_named_ifc_block_nonarray will never
-       * both be non-zero.
-       */
-      unsigned from_named_ifc_block_array:1;
-
-      /**
-       * Non-zero if the variable must be a shader input. This is useful for
-       * constraints on function parameters.
-       */
-      unsigned must_be_shader_input:1;
-
-      /**
-       * Output index for dual source blending.
-       *
-       * \note
-       * The GLSL spec only allows the values 0 or 1 for the index in \b dual
-       * source blending.
-       */
-      unsigned index:1;
-
-      /**
-       * Precision qualifier.
-       *
-       * In desktop GLSL we do not care about precision qualifiers at all, in
-       * fact, the spec says that precision qualifiers are ignored.
-       *
-       * To make things easy, we make it so that this field is always
-       * GLSL_PRECISION_NONE on desktop shaders. This way all the variables
-       * have the same precision value and the checks we add in the compiler
-       * for this field will never break a desktop shader compile.
-       */
-      unsigned precision:2;
-
-      /**
-       * \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:3;
-
-      /**
-       * ARB_shader_image_load_store qualifiers.
-       */
-      unsigned image_read_only:1; /**< "readonly" qualifier. */
-      unsigned image_write_only:1; /**< "writeonly" qualifier. */
-      unsigned image_coherent:1;
-      unsigned image_volatile:1;
-      unsigned image_restrict:1;
-
-      /**
-       * ARB_shader_storage_buffer_object
-       */
-      unsigned from_ssbo_unsized_array:1; /**< unsized array buffer variable. */
-
-      /**
-       * Emit a warning if this variable is accessed.
-       */
-   private:
-      uint8_t warn_extension_index;
-
-   public:
-      /** Image internal format if specified explicitly, otherwise GL_NONE. */
-      uint16_t image_format;
-
-   private:
-      /**
-       * Number of state slots used
-       *
-       * \note
-       * This could be stored in as few as 7-bits, if necessary.  If it is made
-       * smaller, add an assertion to \c ir_variable::allocate_state_slots to
-       * be safe.
-       */
-      uint16_t _num_state_slots;
-
-   public:
-      /**
-       * Initial binding point for a sampler, atomic, or UBO.
-       *
-       * For array types, this represents the binding point for the first element.
-       */
-      int16_t binding;
-
-      /**
-       * Storage location of the base of this variable
-       *
-       * The precise meaning of this field depends on the nature of the variable.
-       *
-       *   - Vertex shader input: one of the values from \c gl_vert_attrib.
-       *   - Vertex shader output: one of the values from \c gl_varying_slot.
-       *   - Geometry shader input: one of the values from \c gl_varying_slot.
-       *   - Geometry shader output: one of the values from \c gl_varying_slot.
-       *   - Fragment shader input: one of the values from \c gl_varying_slot.
-       *   - Fragment shader output: one of the values from \c gl_frag_result.
-       *   - Uniforms: Per-stage uniform slot number for default uniform block.
-       *   - Uniforms: Index within the uniform block definition for UBO members.
-       *   - Non-UBO Uniforms: explicit location until linking then reused to
-       *     store 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;
-
-      /**
-       * Vertex stream output identifier.
-       */
-      unsigned stream;
-
-      /**
-       * Location an atomic counter is stored at.
-       */
-      unsigned offset;
-
-      /**
-       * Highest element accessed with a constant expression array index
-       *
-       * Not used for non-array variables.
-       */
-      unsigned max_array_access;
-
-      /**
-       * Allow (only) ir_variable direct access private members.
-       */
-      friend class ir_variable;
-   } data;
-
-   /**
-    * Value assigned in the initializer of a variable declared "const"
-    */
-   ir_constant *constant_value;
-
-   /**
-    * Constant expression assigned in the initializer of the variable
-    *
-    * \warning
-    * This field and \c ::constant_value are distinct.  Even if the two fields
-    * refer to constants with the same value, they must point to separate
-    * objects.
-    */
-   ir_constant *constant_initializer;
-
-private:
-   static const char *const warn_extension_table[];
-
-   union {
-      /**
-       * For variables which satisfy the is_interface_instance() predicate,
-       * this points to an array of integers such that if the ith member of
-       * the interface block is an array, max_ifc_array_access[i] is the
-       * maximum array element of that member that has been accessed.  If the
-       * ith member of the interface block is not an array,
-       * max_ifc_array_access[i] is unused.
-       *
-       * For variables whose type is not an interface block, this pointer is
-       * NULL.
-       */
-      unsigned *max_ifc_array_access;
-
-      /**
-       * Built-in state that backs this uniform
-       *
-       * Once set at variable creation, \c state_slots must remain invariant.
-       *
-       * If the variable is not a uniform, \c _num_state_slots will be zero
-       * and \c state_slots will be \c NULL.
-       */
-      ir_state_slot *state_slots;
-   } u;
-
-   /**
-    * For variables that are in an interface block or are an instance of an
-    * interface block, this is the \c GLSL_TYPE_INTERFACE type for that block.
-    *
-    * \sa ir_variable::location
-    */
-   const glsl_type *interface_type;
-
-   /**
-    * Name used for anonymous compiler temporaries
-    */
-   static const char tmp_name[];
-
-public:
-   /**
-    * Should the construct keep names for ir_var_temporary variables?
-    *
-    * When this global is false, names passed to the constructor for
-    * \c ir_var_temporary variables will be dropped.  Instead, the variable will
-    * be named "compiler_temp".  This name will be in static storage.
-    *
-    * \warning
-    * \b NEVER change the mode of an \c ir_var_temporary.
-    *
-    * \warning
-    * This variable is \b not thread-safe.  It is global, \b not
-    * per-context. It begins life false.  A context can, at some point, make
-    * it true.  From that point on, it will be true forever.  This should be
-    * okay since it will only be set true while debugging.
-    */
-   static bool temporaries_allocate_names;
-};
-
-/**
- * A function that returns whether a built-in function is available in the
- * current shading language (based on version, ES or desktop, and extensions).
- */
-typedef bool (*builtin_available_predicate)(const _mesa_glsl_parse_state *);
-
-/*@{*/
-/**
- * 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,
-                         builtin_available_predicate builtin_avail = NULL);
-
-   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 *);
-
-   /**
-    * Attempt to evaluate this function as a constant expression,
-    * given a list of the actual parameters and the variable context.
-    * Returns NULL for non-built-ins.
-    */
-   ir_constant *constant_expression_value(exec_list *actual_parameters, struct hash_table *variable_context);
-
-   /**
-    * 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. */
-   bool is_builtin() const;
-
-   /**
-    * Whether or not this function is an intrinsic to be implemented
-    * by the driver.
-    */
-   bool is_intrinsic;
-
-   /** Whether or not a built-in is available for this shader. */
-   bool is_builtin_available(const _mesa_glsl_parse_state *state) const;
-
-   /** Body of instructions in the function. */
-   struct exec_list body;
-
-private:
-   /**
-    * A function pointer to a predicate that answers whether a built-in
-    * function is available in the current shader.  NULL if not a built-in.
-    */
-   builtin_available_predicate builtin_avail;
-
-   /** Function of which this signature is one overload. */
-   class ir_function *_function;
-
-   /** Function signature of which this one is a prototype clone */
-   const ir_function_signature *origin;
-
-   friend class ir_function;
-
-   /**
-    * Helper function to run a list of instructions for constant
-    * expression evaluation.
-    *
-    * The hash table represents the values of the visible variables.
-    * There are no scoping issues because the table is indexed on
-    * ir_variable pointers, not variable names.
-    *
-    * Returns false if the expression is not constant, true otherwise,
-    * and the value in *result if result is non-NULL.
-    */
-   bool constant_expression_evaluate_expression_list(const struct exec_list &body,
-						     struct hash_table *variable_context,
-						     ir_constant **result);
-};
-
-
-/**
- * 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 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);
-   }
-
-   /**
-    * Find a signature that matches a set of actual parameters, taking implicit
-    * conversions into account.  Also flags whether the match was exact.
-    */
-   ir_function_signature *matching_signature(_mesa_glsl_parse_state *state,
-                                             const exec_list *actual_param,
-                                             bool allow_builtins,
-					     bool *match_is_exact);
-
-   /**
-    * Find a signature that matches a set of actual parameters, taking implicit
-    * conversions into account.
-    */
-   ir_function_signature *matching_signature(_mesa_glsl_parse_state *state,
-                                             const exec_list *actual_param,
-                                             bool allow_builtins);
-
-   /**
-    * Find a signature that exactly matches a set of actual parameters without
-    * any implicit type conversions.
-    */
-   ir_function_signature *exact_matching_signature(_mesa_glsl_parse_state *state,
-                                                   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;
-
-   /**
-    * is this function a subroutine type declaration
-    * e.g. subroutine void type1(float arg1);
-    */
-   bool is_subroutine;
-
-   /**
-    * is this function associated to a subroutine type
-    * e.g. subroutine (type1, type2) function_name { function_body };
-    * would have num_subroutine_types 2,
-    * and pointers to the type1 and type2 types.
-    */
-   int num_subroutine_types;
-   const struct glsl_type **subroutine_types;
-
-   int subroutine_index;
-};
-
-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)
-      : ir_instruction(ir_type_if), condition(condition)
-   {
-   }
-
-   virtual ir_if *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 *);
-
-   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 *);
-
-   /** List of ir_instruction that make up the body of the loop. */
-   exec_list body_instructions;
-};
-
-
-class ir_assignment : public ir_instruction {
-public:
-   ir_assignment(ir_rvalue *lhs, ir_rvalue *rhs, ir_rvalue *condition = NULL);
-
-   /**
-    * 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(struct hash_table *variable_context = NULL);
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   /**
-    * 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::get_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_f2u,         /**< Float-to-unsigned 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_i2u,         /**< Integer-to-unsigned conversion. */
-   ir_unop_u2i,         /**< Unsigned-to-integer conversion. */
-   ir_unop_d2f,         /**< Double-to-float conversion. */
-   ir_unop_f2d,         /**< Float-to-double conversion. */
-   ir_unop_d2i,         /**< Double-to-integer conversion. */
-   ir_unop_i2d,         /**< Integer-to-double conversion. */
-   ir_unop_d2u,         /**< Double-to-unsigned conversion. */
-   ir_unop_u2d,         /**< Unsigned-to-double conversion. */
-   ir_unop_d2b,         /**< Double-to-boolean conversion. */
-   ir_unop_bitcast_i2f, /**< Bit-identical int-to-float "conversion" */
-   ir_unop_bitcast_f2i, /**< Bit-identical float-to-int "conversion" */
-   ir_unop_bitcast_u2f, /**< Bit-identical uint-to-float "conversion" */
-   ir_unop_bitcast_f2u, /**< Bit-identical float-to-uint "conversion" */
-
-   /**
-    * \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,
-   /*@}*/
-
-   /**
-    * \name Partial derivatives.
-    */
-   /*@{*/
-   ir_unop_dFdx,
-   ir_unop_dFdx_coarse,
-   ir_unop_dFdx_fine,
-   ir_unop_dFdy,
-   ir_unop_dFdy_coarse,
-   ir_unop_dFdy_fine,
-   /*@}*/
-
-   /**
-    * \name Floating point pack and unpack operations.
-    */
-   /*@{*/
-   ir_unop_pack_snorm_2x16,
-   ir_unop_pack_snorm_4x8,
-   ir_unop_pack_unorm_2x16,
-   ir_unop_pack_unorm_4x8,
-   ir_unop_pack_half_2x16,
-   ir_unop_unpack_snorm_2x16,
-   ir_unop_unpack_snorm_4x8,
-   ir_unop_unpack_unorm_2x16,
-   ir_unop_unpack_unorm_4x8,
-   ir_unop_unpack_half_2x16,
-   /*@}*/
-
-   /**
-    * \name Lowered floating point unpacking operations.
-    *
-    * \see lower_packing_builtins_visitor::split_unpack_half_2x16
-    */
-   /*@{*/
-   ir_unop_unpack_half_2x16_split_x,
-   ir_unop_unpack_half_2x16_split_y,
-   /*@}*/
-
-   /**
-    * \name Bit operations, part of ARB_gpu_shader5.
-    */
-   /*@{*/
-   ir_unop_bitfield_reverse,
-   ir_unop_bit_count,
-   ir_unop_find_msb,
-   ir_unop_find_lsb,
-   /*@}*/
-
-   ir_unop_saturate,
-
-   /**
-    * \name Double packing, part of ARB_gpu_shader_fp64.
-    */
-   /*@{*/
-   ir_unop_pack_double_2x32,
-   ir_unop_unpack_double_2x32,
-   /*@}*/
-
-   ir_unop_frexp_sig,
-   ir_unop_frexp_exp,
-
-   ir_unop_noise,
-
-   ir_unop_subroutine_to_int,
-   /**
-    * Interpolate fs input at centroid
-    *
-    * operand0 is the fs input.
-    */
-   ir_unop_interpolate_at_centroid,
-
-   /**
-    * Ask the driver for the total size of a buffer block.
-    *
-    * operand0 is the ir_constant buffer block index in the linked shader.
-    */
-   ir_unop_get_buffer_size,
-
-   /**
-    * Calculate length of an unsized array inside a buffer block.
-    * This opcode is going to be replaced in a lowering pass inside
-    * the linker.
-    *
-    * operand0 is the unsized array's ir_value for the calculation
-    * of its length.
-    */
-   ir_unop_ssbo_unsized_array_length,
-
-   /**
-    * A sentinel marking the last of the unary operations.
-    */
-   ir_last_unop = ir_unop_ssbo_unsized_array_length,
-
-   ir_binop_add,
-   ir_binop_sub,
-   ir_binop_mul,       /**< Floating-point or low 32-bit integer multiply. */
-   ir_binop_imul_high, /**< Calculates the high 32-bits of a 64-bit multiply. */
-   ir_binop_div,
-
-   /**
-    * Returns the carry resulting from the addition of the two arguments.
-    */
-   /*@{*/
-   ir_binop_carry,
-   /*@}*/
-
-   /**
-    * Returns the borrow resulting from the subtraction of the second argument
-    * from the first argument.
-    */
-   /*@{*/
-   ir_binop_borrow,
-   /*@}*/
-
-   /**
-    * 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,
-
-   /**
-    * \name Lowered floating point packing operations.
-    *
-    * \see lower_packing_builtins_visitor::split_pack_half_2x16
-    */
-   /*@{*/
-   ir_binop_pack_half_2x16_split,
-   /*@}*/
-
-   /**
-    * Load a value the size of a given GLSL type from a uniform block.
-    *
-    * operand0 is the ir_constant uniform block index in the linked shader.
-    * operand1 is a byte offset within the uniform block.
-    */
-   ir_binop_ubo_load,
-
-   /**
-    * \name Multiplies a number by two to a power, part of ARB_gpu_shader5.
-    */
-   /*@{*/
-   ir_binop_ldexp,
-   /*@}*/
-
-   /**
-    * Extract a scalar from a vector
-    *
-    * operand0 is the vector
-    * operand1 is the index of the field to read from operand0
-    */
-   ir_binop_vector_extract,
-
-   /**
-    * Interpolate fs input at offset
-    *
-    * operand0 is the fs input
-    * operand1 is the offset from the pixel center
-    */
-   ir_binop_interpolate_at_offset,
-
-   /**
-    * Interpolate fs input at sample position
-    *
-    * operand0 is the fs input
-    * operand1 is the sample ID
-    */
-   ir_binop_interpolate_at_sample,
-
-   /**
-    * A sentinel marking the last of the binary operations.
-    */
-   ir_last_binop = ir_binop_interpolate_at_sample,
-
-   /**
-    * \name Fused floating-point multiply-add, part of ARB_gpu_shader5.
-    */
-   /*@{*/
-   ir_triop_fma,
-   /*@}*/
-
-   ir_triop_lrp,
-
-   /**
-    * \name Conditional Select
-    *
-    * A vector conditional select instruction (like ?:, but operating per-
-    * component on vectors).
-    *
-    * \see lower_instructions_visitor::ldexp_to_arith
-    */
-   /*@{*/
-   ir_triop_csel,
-   /*@}*/
-
-   ir_triop_bitfield_extract,
-
-   /**
-    * Generate a value with one field of a vector changed
-    *
-    * operand0 is the vector
-    * operand1 is the value to write into the vector result
-    * operand2 is the index in operand0 to be modified
-    */
-   ir_triop_vector_insert,
-
-   /**
-    * A sentinel marking the last of the ternary operations.
-    */
-   ir_last_triop = ir_triop_vector_insert,
-
-   ir_quadop_bitfield_insert,
-
-   ir_quadop_vector,
-
-   /**
-    * A sentinel marking the last of the ternary operations.
-    */
-   ir_last_quadop = ir_quadop_vector,
-
-   /**
-    * A sentinel marking the last of all operations.
-    */
-   ir_last_opcode = ir_quadop_vector
-};
-
-class ir_expression : public ir_rvalue {
-public:
-   ir_expression(int op, const struct glsl_type *type,
-                 ir_rvalue *op0, ir_rvalue *op1 = NULL,
-                 ir_rvalue *op2 = NULL, ir_rvalue *op3 = NULL);
-
-   /**
-    * Constructor for unary operation expressions
-    */
-   ir_expression(int op, ir_rvalue *);
-
-   /**
-    * Constructor for binary operation expressions
-    */
-   ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1);
-
-   /**
-    * Constructor for ternary operation expressions
-    */
-   ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1, ir_rvalue *op2);
-
-   virtual bool equals(const ir_instruction *ir,
-                       enum ir_node_type ignore = ir_type_unset) const;
-
-   virtual ir_expression *clone(void *mem_ctx, struct hash_table *ht) const;
-
-   /**
-    * Attempt to constant-fold the expression
-    *
-    * The "variable_context" hash table links ir_variable * to ir_constant *
-    * that represent the variables' values.  \c NULL represents an empty
-    * context.
-    *
-    * If the expression cannot be constant folded, this method will return
-    * \c NULL.
-    */
-   virtual ir_constant *constant_expression_value(struct hash_table *variable_context = NULL);
-
-   /**
-    * 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 whether the expression operates on vectors horizontally.
-    */
-   bool is_horizontal() const
-   {
-      return operation == ir_binop_all_equal ||
-             operation == ir_binop_any_nequal ||
-             operation == ir_binop_dot ||
-             operation == ir_binop_vector_extract ||
-             operation == ir_triop_vector_insert ||
-             operation == ir_quadop_vector;
-   }
-
-   /**
-    * 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 *);
-
-   virtual ir_variable *variable_referenced() const;
-
-   ir_expression_operation operation;
-   ir_rvalue *operands[4];
-};
-
-
-/**
- * HIR instruction representing a high-level function call, containing a list
- * of parameters and returning a value in the supplied temporary.
- */
-class ir_call : public ir_instruction {
-public:
-   ir_call(ir_function_signature *callee,
-	   ir_dereference_variable *return_deref,
-	   exec_list *actual_parameters)
-      : ir_instruction(ir_type_call), return_deref(return_deref), callee(callee), sub_var(NULL), array_idx(NULL)
-   {
-      assert(callee->return_type != NULL);
-      actual_parameters->move_nodes_to(& this->actual_parameters);
-      this->use_builtin = callee->is_builtin();
-   }
-
-   ir_call(ir_function_signature *callee,
-	   ir_dereference_variable *return_deref,
-	   exec_list *actual_parameters,
-	   ir_variable *var, ir_rvalue *array_idx)
-      : ir_instruction(ir_type_call), return_deref(return_deref), callee(callee), sub_var(var), array_idx(array_idx)
-   {
-      assert(callee->return_type != NULL);
-      actual_parameters->move_nodes_to(& this->actual_parameters);
-      this->use_builtin = callee->is_builtin();
-   }
-
-   virtual ir_call *clone(void *mem_ctx, struct hash_table *ht) const;
-
-   virtual ir_constant *constant_expression_value(struct hash_table *variable_context = NULL);
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   /**
-    * Get the name of the function being called.
-    */
-   const char *callee_name() const
-   {
-      return callee->function_name();
-   }
-
-   /**
-    * Generates an inline version of the function before @ir,
-    * storing the return value in return_deref.
-    */
-   void generate_inline(ir_instruction *ir);
-
-   /**
-    * Storage for the function's return value.
-    * This must be NULL if the return type is void.
-    */
-   ir_dereference_variable *return_deref;
-
-   /**
-    * The specific function signature being called.
-    */
-   ir_function_signature *callee;
-
-   /* List of ir_rvalue of paramaters passed in this call. */
-   exec_list actual_parameters;
-
-   /** Should this call only bind to a built-in function? */
-   bool use_builtin;
-
-   /*
-    * ARB_shader_subroutine support -
-    * the subroutine uniform variable and array index
-    * rvalue to be used in the lowering pass later.
-    */
-   ir_variable *sub_var;
-   ir_rvalue *array_idx;
-};
-
-
-/**
- * \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(enum ir_node_type t)
-      : ir_instruction(t)
-   {
-   }
-};
-
-class ir_return : public ir_jump {
-public:
-   ir_return()
-      : ir_jump(ir_type_return), value(NULL)
-   {
-   }
-
-   ir_return(ir_rvalue *value)
-      : ir_jump(ir_type_return), value(value)
-   {
-   }
-
-   virtual ir_return *clone(void *mem_ctx, struct hash_table *) const;
-
-   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)
-      : ir_jump(ir_type_loop_jump)
-   {
-      this->mode = mode;
-   }
-
-   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;
-};
-
-/**
- * IR instruction representing discard statements.
- */
-class ir_discard : public ir_jump {
-public:
-   ir_discard()
-      : ir_jump(ir_type_discard)
-   {
-      this->condition = NULL;
-   }
-
-   ir_discard(ir_rvalue *cond)
-      : ir_jump(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 *);
-
-   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_txf_ms,           /**< Multisample texture fetch */
-   ir_txs,		/**< Texture size */
-   ir_lod,		/**< Texture lod query */
-   ir_tg4,		/**< Texture gather */
-   ir_query_levels,     /**< Texture levels query */
-   ir_texture_samples,  /**< Texture samples query */
-   ir_samples_identical, /**< Query whether all samples are definitely identical. */
-};
-
-
-/**
- * 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>)
- * (txf_ms
- *      <type> <sampler> <coordinate>         <sample_index>)
- * (txs <type> <sampler> <lod>)
- * (lod <type> <sampler> <coordinate>)
- * (tg4 <type> <sampler> <coordinate> <offset> <component>)
- * (query_levels <type> <sampler>)
- * (samples_identical <sampler> <coordinate>)
- */
-class ir_texture : public ir_rvalue {
-public:
-   ir_texture(enum ir_texture_opcode op)
-      : ir_rvalue(ir_type_texture),
-        op(op), sampler(NULL), coordinate(NULL), projector(NULL),
-        shadow_comparitor(NULL), offset(NULL)
-   {
-      memset(&lod_info, 0, sizeof(lod_info));
-   }
-
-   virtual ir_texture *clone(void *mem_ctx, struct hash_table *) const;
-
-   virtual ir_constant *constant_expression_value(struct hash_table *variable_context = NULL);
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   virtual bool equals(const ir_instruction *ir,
-                       enum ir_node_type ignore = ir_type_unset) const;
-
-   /**
-    * 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 */
-      ir_rvalue *sample_index;  /**< MSAA sample index */
-      ir_rvalue *component;     /**< Gather component selector */
-      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(struct hash_table *variable_context = NULL);
-
-   /**
-    * 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 *);
-
-   virtual bool equals(const ir_instruction *ir,
-                       enum ir_node_type ignore = ir_type_unset) const;
-
-   bool is_lvalue() const
-   {
-      return val->is_lvalue() && !mask.has_duplicates;
-   }
-
-   /**
-    * Get the variable that is ultimately referenced by an r-value
-    */
-   virtual ir_variable *variable_referenced() const;
-
-   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;
-
-   bool is_lvalue() const;
-
-   /**
-    * Get the variable that is ultimately referenced by an r-value
-    */
-   virtual ir_variable *variable_referenced() const = 0;
-
-protected:
-   ir_dereference(enum ir_node_type t)
-      : ir_rvalue(t)
-   {
-   }
-};
-
-
-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(struct hash_table *variable_context = NULL);
-
-   virtual bool equals(const ir_instruction *ir,
-                       enum ir_node_type ignore = ir_type_unset) const;
-
-   /**
-    * Get the variable that is ultimately referenced by an r-value
-    */
-   virtual ir_variable *variable_referenced() const
-   {
-      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(struct hash_table *variable_context = NULL);
-
-   virtual bool equals(const ir_instruction *ir,
-                       enum ir_node_type ignore = ir_type_unset) const;
-
-   /**
-    * Get the variable that is ultimately referenced by an r-value
-    */
-   virtual ir_variable *variable_referenced() const
-   {
-      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(struct hash_table *variable_context = NULL);
-
-   /**
-    * Get the variable that is ultimately referenced by an r-value
-    */
-   virtual ir_variable *variable_referenced() const
-   {
-      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];
-      double d[16];
-};
-
-
-class ir_constant : public ir_rvalue {
-public:
-   ir_constant(const struct glsl_type *type, const ir_constant_data *data);
-   ir_constant(bool b, unsigned vector_elements=1);
-   ir_constant(unsigned int u, unsigned vector_elements=1);
-   ir_constant(int i, unsigned vector_elements=1);
-   ir_constant(float f, unsigned vector_elements=1);
-   ir_constant(double d, unsigned vector_elements=1);
-
-   /**
-    * 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(struct hash_table *variable_context = NULL);
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   virtual bool equals(const ir_instruction *ir,
-                       enum ir_node_type ignore = ir_type_unset) const;
-
-   /**
-    * 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;
-   double get_double_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);
-
-   /**
-    * Copy the values on another constant at a given offset.
-    *
-    * The offset is ignored for array or struct copies, it's only for
-    * scalars or vectors into vectors or matrices.
-    *
-    * With identical types on both sides and zero offset it's clone()
-    * without creating a new object.
-    */
-
-   void copy_offset(ir_constant *src, int offset);
-
-   /**
-    * Copy the values on another constant at a given offset and
-    * following an assign-like mask.
-    *
-    * The mask is ignored for scalars.
-    *
-    * Note that this function only handles what assign can handle,
-    * i.e. at most a vector as source and a column of a matrix as
-    * destination.
-    */
-
-   void copy_masked_offset(ir_constant *src, int offset, unsigned int mask);
-
-   /**
-    * 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;
-
-   /**
-    * Return true if this ir_constant represents the given value.
-    *
-    * For vectors, this checks that each component is the given value.
-    */
-   virtual bool is_value(float f, int i) const;
-   virtual bool is_zero() const;
-   virtual bool is_one() const;
-   virtual bool is_negative_one() const;
-
-   /**
-    * Return true for constants that could be stored as 16-bit unsigned values.
-    *
-    * Note that this will return true even for signed integer ir_constants, as
-    * long as the value is non-negative and fits in 16-bits.
-    */
-   virtual bool is_uint16_constant() 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);
-};
-
-/**
- * IR instruction to emit a vertex in a geometry shader.
- */
-class ir_emit_vertex : public ir_instruction {
-public:
-   ir_emit_vertex(ir_rvalue *stream)
-      : ir_instruction(ir_type_emit_vertex),
-        stream(stream)
-   {
-      assert(stream);
-   }
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_emit_vertex *clone(void *mem_ctx, struct hash_table *ht) const
-   {
-      return new(mem_ctx) ir_emit_vertex(this->stream->clone(mem_ctx, ht));
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   int stream_id() const
-   {
-      return stream->as_constant()->value.i[0];
-   }
-
-   ir_rvalue *stream;
-};
-
-/**
- * IR instruction to complete the current primitive and start a new one in a
- * geometry shader.
- */
-class ir_end_primitive : public ir_instruction {
-public:
-   ir_end_primitive(ir_rvalue *stream)
-      : ir_instruction(ir_type_end_primitive),
-        stream(stream)
-   {
-      assert(stream);
-   }
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_end_primitive *clone(void *mem_ctx, struct hash_table *ht) const
-   {
-      return new(mem_ctx) ir_end_primitive(this->stream->clone(mem_ctx, ht));
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-
-   int stream_id() const
-   {
-      return stream->as_constant()->value.i[0];
-   }
-
-   ir_rvalue *stream;
-};
-
-/**
- * IR instruction for tessellation control and compute shader barrier.
- */
-class ir_barrier : public ir_instruction {
-public:
-   ir_barrier()
-      : ir_instruction(ir_type_barrier)
-   {
-   }
-
-   virtual void accept(ir_visitor *v)
-   {
-      v->visit(this);
-   }
-
-   virtual ir_barrier *clone(void *mem_ctx, struct hash_table *) const
-   {
-      return new(mem_ctx) ir_barrier();
-   }
-
-   virtual ir_visitor_status accept(ir_hierarchical_visitor *);
-};
-
-/*@}*/
-
-/**
- * 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);
-
-struct _mesa_glsl_parse_state;
-struct gl_shader_program;
-
-/**
- * Detect whether an unlinked shader contains static recursion
- *
- * If the list of instructions is determined to contain static recursion,
- * \c _mesa_glsl_error will be called to emit error messages for each function
- * that is in the recursion cycle.
- */
-void
-detect_recursion_unlinked(struct _mesa_glsl_parse_state *state,
-			  exec_list *instructions);
-
-/**
- * Detect whether a linked shader contains static recursion
- *
- * If the list of instructions is determined to contain static recursion,
- * \c link_error_printf will be called to emit error messages for each function
- * that is in the recursion cycle.  In addition,
- * \c gl_shader_program::LinkStatus will be set to false.
- */
-void
-detect_recursion_linked(struct gl_shader_program *prog,
-			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_derived_variables(gl_shader *shader);
-
-extern void
-_mesa_glsl_initialize_functions(_mesa_glsl_parse_state *state);
-
-extern void
-_mesa_glsl_initialize_builtin_functions();
-
-extern ir_function_signature *
-_mesa_glsl_find_builtin_function(_mesa_glsl_parse_state *state,
-                                 const char *name, exec_list *actual_parameters);
-
-extern ir_function *
-_mesa_glsl_find_builtin_function_by_name(const char *name);
-
-extern gl_shader *
-_mesa_glsl_get_builtin_function_shader(void);
-
-extern ir_function_signature *
-_mesa_get_main_function_signature(gl_shader *sh);
-
-extern void
-_mesa_glsl_release_functions(void);
-
-extern void
-_mesa_glsl_release_builtin_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,
-                      gl_shader_stage shader_stage);
-
-extern char *
-prototype_string(const glsl_type *return_type, const char *name,
-		 exec_list *parameters);
-
-const char *
-mode_string(const ir_variable *var);
-
-/**
- * Built-in / reserved GL variables names start with "gl_"
- */
-static inline bool
-is_gl_identifier(const char *s)
-{
-   return s && s[0] == 'g' && s[1] == 'l' && s[2] == '_';
-}
-
-extern "C" {
-#endif /* __cplusplus */
-
-extern void _mesa_print_ir(FILE *f, struct exec_list *instructions,
-                           struct _mesa_glsl_parse_state *state);
-
-extern void
-fprint_ir(FILE *f, const void *instruction);
-
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-
-unsigned
-vertices_per_prim(GLenum prim);
-
-#endif /* IR_H */