xserver pixman mesa git update 19 jan 2011

1 files changed, 747 insertions, 725 deletions

diff --git a/mesalib/src/glsl/ast.h b/mesalib/src/glsl/ast.h
index e414ac8b5..0e2811ca6 100644
--- a/mesalib/src/glsl/ast.h
+++ b/mesalib/src/glsl/ast.h
@@ -1,725 +1,747 @@
-/* -*- c++ -*- */

-/*

- * Copyright © 2009 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 AST_H

-#define AST_H

-

-#include "list.h"

-#include "glsl_parser_extras.h"

-

-struct _mesa_glsl_parse_state;

-

-struct YYLTYPE;

-

-/**

- * \defgroup AST Abstract syntax tree node definitions

- *

- * An abstract syntax tree is generated by the parser.  This is a fairly

- * direct representation of the gramma derivation for the source program.

- * No symantic checking is done during the generation of the AST.  Only

- * syntactic checking is done.  Symantic checking is performed by a later

- * stage that converts the AST to a more generic intermediate representation.

- *

- *@{

- */

-/**

- * Base class of all abstract syntax tree nodes

- */

-class ast_node {

-public:

-   /* Callers of this talloc-based new need not call delete. It's

-    * easier to just talloc_free 'ctx' (or any of its ancestors). */

-   static void* operator new(size_t size, void *ctx)

-   {

-      void *node;

-

-      node = talloc_zero_size(ctx, size);

-      assert(node != NULL);

-

-      return node;

-   }

-

-   /* If the user *does* call delete, that's OK, we will just

-    * talloc_free in that case. */

-   static void operator delete(void *table)

-   {

-      talloc_free(table);

-   }

-

-   /**

-    * Print an AST node in something approximating the original GLSL code

-    */

-   virtual void print(void) const;

-

-   /**

-    * Convert the AST node to the high-level intermediate representation

-    */

-   virtual ir_rvalue *hir(exec_list *instructions,

-			  struct _mesa_glsl_parse_state *state);

-

-   /**

-    * Retrieve the source location of an AST node

-    *

-    * This function is primarily used to get the source position of an AST node

-    * into a form that can be passed to \c _mesa_glsl_error.

-    *

-    * \sa _mesa_glsl_error, ast_node::set_location

-    */

-   struct YYLTYPE get_location(void) const

-   {

-      struct YYLTYPE locp;

-

-      locp.source = this->location.source;

-      locp.first_line = this->location.line;

-      locp.first_column = this->location.column;

-      locp.last_line = locp.first_line;

-      locp.last_column = locp.first_column;

-

-      return locp;

-   }

-

-   /**

-    * Set the source location of an AST node from a parser location

-    *

-    * \sa ast_node::get_location

-    */

-   void set_location(const struct YYLTYPE &locp)

-   {

-      this->location.source = locp.source;

-      this->location.line = locp.first_line;

-      this->location.column = locp.first_column;

-   }

-

-   /**

-    * Source location of the AST node.

-    */

-   struct {

-      unsigned source;    /**< GLSL source number. */

-      unsigned line;      /**< Line number within the source string. */

-      unsigned column;    /**< Column in the line. */

-   } location;

-

-   exec_node link;

-

-protected:

-   /**

-    * The only constructor is protected so that only derived class objects can

-    * be created.

-    */

-   ast_node(void);

-};

-

-

-/**

- * Operators for AST expression nodes.

- */

-enum ast_operators {

-   ast_assign,

-   ast_plus,        /**< Unary + operator. */

-   ast_neg,

-   ast_add,

-   ast_sub,

-   ast_mul,

-   ast_div,

-   ast_mod,

-   ast_lshift,

-   ast_rshift,

-   ast_less,

-   ast_greater,

-   ast_lequal,

-   ast_gequal,

-   ast_equal,

-   ast_nequal,

-   ast_bit_and,

-   ast_bit_xor,

-   ast_bit_or,

-   ast_bit_not,

-   ast_logic_and,

-   ast_logic_xor,

-   ast_logic_or,

-   ast_logic_not,

-

-   ast_mul_assign,

-   ast_div_assign,

-   ast_mod_assign,

-   ast_add_assign,

-   ast_sub_assign,

-   ast_ls_assign,

-   ast_rs_assign,

-   ast_and_assign,

-   ast_xor_assign,

-   ast_or_assign,

-

-   ast_conditional,

-

-   ast_pre_inc,

-   ast_pre_dec,

-   ast_post_inc,

-   ast_post_dec,

-   ast_field_selection,

-   ast_array_index,

-

-   ast_function_call,

-

-   ast_identifier,

-   ast_int_constant,

-   ast_uint_constant,

-   ast_float_constant,

-   ast_bool_constant,

-

-   ast_sequence

-};

-

-/**

- * Representation of any sort of expression.

- */

-class ast_expression : public ast_node {

-public:

-   ast_expression(int oper, ast_expression *,

-		  ast_expression *, ast_expression *);

-

-   ast_expression(const char *identifier) :

-      oper(ast_identifier)

-   {

-      subexpressions[0] = NULL;

-      subexpressions[1] = NULL;

-      subexpressions[2] = NULL;

-      primary_expression.identifier = (char *) identifier;

-   }

-

-   static const char *operator_string(enum ast_operators op);

-

-   virtual ir_rvalue *hir(exec_list *instructions,

-			  struct _mesa_glsl_parse_state *state);

-

-   virtual void print(void) const;

-

-   enum ast_operators oper;

-

-   ast_expression *subexpressions[3];

-

-   union {

-      char *identifier;

-      int int_constant;

-      float float_constant;

-      unsigned uint_constant;

-      int bool_constant;

-   } primary_expression;

-

-

-   /**

-    * List of expressions for an \c ast_sequence or parameters for an

-    * \c ast_function_call

-    */

-   exec_list expressions;

-};

-

-class ast_expression_bin : public ast_expression {

-public:

-   ast_expression_bin(int oper, ast_expression *, ast_expression *);

-

-   virtual void print(void) const;

-};

-

-/**

- * Subclass of expressions for function calls

- */

-class ast_function_expression : public ast_expression {

-public:

-   ast_function_expression(ast_expression *callee)

-      : ast_expression(ast_function_call, callee,

-		       NULL, NULL),

-	cons(false)

-   {

-      /* empty */

-   }

-

-   ast_function_expression(class ast_type_specifier *type)

-      : ast_expression(ast_function_call, (ast_expression *) type,

-		       NULL, NULL),

-	cons(true)

-   {

-      /* empty */

-   }

-

-   bool is_constructor() const

-   {

-      return cons;

-   }

-

-   virtual ir_rvalue *hir(exec_list *instructions,

-			  struct _mesa_glsl_parse_state *state);

-

-private:

-   /**

-    * Is this function call actually a constructor?

-    */

-   bool cons;

-};

-

-

-/**

- * Number of possible operators for an ast_expression

- *

- * This is done as a define instead of as an additional value in the enum so

- * that the compiler won't generate spurious messages like "warning:

- * enumeration value ‘ast_num_operators’ not handled in switch"

- */

-#define AST_NUM_OPERATORS (ast_sequence + 1)

-

-

-class ast_compound_statement : public ast_node {

-public:

-   ast_compound_statement(int new_scope, ast_node *statements);

-   virtual void print(void) const;

-

-   virtual ir_rvalue *hir(exec_list *instructions,

-			  struct _mesa_glsl_parse_state *state);

-

-   int new_scope;

-   exec_list statements;

-};

-

-class ast_declaration : public ast_node {

-public:

-   ast_declaration(char *identifier, int is_array, ast_expression *array_size,

-		   ast_expression *initializer);

-   virtual void print(void) const;

-

-   char *identifier;

-   

-   int is_array;

-   ast_expression *array_size;

-

-   ast_expression *initializer;

-};

-

-

-enum {

-   ast_precision_high = 0, /**< Default precision. */

-   ast_precision_medium,

-   ast_precision_low

-};

-

-struct ast_type_qualifier {

-   union {

-      struct {

-	 unsigned invariant:1;

-	 unsigned constant:1;

-	 unsigned attribute:1;

-	 unsigned varying:1;

-	 unsigned in:1;

-	 unsigned out:1;

-	 unsigned centroid:1;

-	 unsigned uniform:1;

-	 unsigned smooth:1;

-	 unsigned flat:1;

-	 unsigned noperspective:1;

-

-	 /** \name Layout qualifiers for GL_ARB_fragment_coord_conventions */

-	 /*@{*/

-	 unsigned origin_upper_left:1;

-	 unsigned pixel_center_integer:1;

-	 /*@}*/

-

-	 /**

-	  * Flag set if GL_ARB_explicit_attrib_location "location" layout

-	  * qualifier is used.

-	  */

-	 unsigned explicit_location:1;

-      }

-      /** \brief Set of flags, accessed by name. */

-      q;

-

-      /** \brief Set of flags, accessed as a bitmask. */

-      unsigned i;

-   } flags;

-

-   /**

-    * Location specified via GL_ARB_explicit_attrib_location layout

-    *

-    * \note

-    * This field is only valid if \c explicit_location is set.

-    */

-   unsigned location;

-};

-

-class ast_struct_specifier : public ast_node {

-public:

-   ast_struct_specifier(char *identifier, ast_node *declarator_list);

-   virtual void print(void) const;

-

-   virtual ir_rvalue *hir(exec_list *instructions,

-			  struct _mesa_glsl_parse_state *state);

-

-   char *name;

-   exec_list declarations;

-};

-

-

-enum ast_types {

-   ast_void,

-   ast_float,

-   ast_int,

-   ast_uint,

-   ast_bool,

-   ast_vec2,

-   ast_vec3,

-   ast_vec4,

-   ast_bvec2,

-   ast_bvec3,

-   ast_bvec4,

-   ast_ivec2,

-   ast_ivec3,

-   ast_ivec4,

-   ast_uvec2,

-   ast_uvec3,

-   ast_uvec4,

-   ast_mat2,

-   ast_mat2x3,

-   ast_mat2x4,

-   ast_mat3x2,

-   ast_mat3,

-   ast_mat3x4,

-   ast_mat4x2,

-   ast_mat4x3,

-   ast_mat4,

-   ast_sampler1d,

-   ast_sampler2d,

-   ast_sampler2drect,

-   ast_sampler3d,

-   ast_samplercube,

-   ast_sampler1dshadow,

-   ast_sampler2dshadow,

-   ast_sampler2drectshadow,

-   ast_samplercubeshadow,

-   ast_sampler1darray,

-   ast_sampler2darray,

-   ast_sampler1darrayshadow,

-   ast_sampler2darrayshadow,

-   ast_isampler1d,

-   ast_isampler2d,

-   ast_isampler3d,

-   ast_isamplercube,

-   ast_isampler1darray,

-   ast_isampler2darray,

-   ast_usampler1d,

-   ast_usampler2d,

-   ast_usampler3d,

-   ast_usamplercube,

-   ast_usampler1darray,

-   ast_usampler2darray,

-

-   ast_struct,

-   ast_type_name

-};

-

-

-class ast_type_specifier : public ast_node {

-public:

-   ast_type_specifier(int specifier);

-

-   /** Construct a type specifier from a type name */

-   ast_type_specifier(const char *name) 

-      : type_specifier(ast_type_name), type_name(name), structure(NULL),

-	is_array(false), array_size(NULL), precision(ast_precision_high)

-   {

-      /* empty */

-   }

-

-   /** Construct a type specifier from a structure definition */

-   ast_type_specifier(ast_struct_specifier *s)

-      : type_specifier(ast_struct), type_name(s->name), structure(s),

-	is_array(false), array_size(NULL), precision(ast_precision_high)

-   {

-      /* empty */

-   }

-

-   const struct glsl_type *glsl_type(const char **name,

-				     struct _mesa_glsl_parse_state *state)

-      const;

-

-   virtual void print(void) const;

-

-   ir_rvalue *hir(exec_list *, struct _mesa_glsl_parse_state *);

-

-   enum ast_types type_specifier;

-

-   const char *type_name;

-   ast_struct_specifier *structure;

-

-   int is_array;

-   ast_expression *array_size;

-

-   unsigned precision:2;

-};

-

-

-class ast_fully_specified_type : public ast_node {

-public:

-   virtual void print(void) const;

-   bool has_qualifiers() const;

-

-   ast_type_qualifier qualifier;

-   ast_type_specifier *specifier;

-};

-

-

-class ast_declarator_list : public ast_node {

-public:

-   ast_declarator_list(ast_fully_specified_type *);

-   virtual void print(void) const;

-

-   virtual ir_rvalue *hir(exec_list *instructions,

-			  struct _mesa_glsl_parse_state *state);

-

-   ast_fully_specified_type *type;

-   exec_list declarations;

-

-   /**

-    * Special flag for vertex shader "invariant" declarations.

-    *

-    * Vertex shaders can contain "invariant" variable redeclarations that do

-    * not include a type.  For example, "invariant gl_Position;".  This flag

-    * is used to note these cases when no type is specified.

-    */

-   int invariant;

-};

-

-

-class ast_parameter_declarator : public ast_node {

-public:

-   ast_parameter_declarator()

-   {

-      this->identifier = NULL;

-      this->is_array = false;

-      this->array_size = 0;

-   }

-

-   virtual void print(void) const;

-

-   virtual ir_rvalue *hir(exec_list *instructions,

-			  struct _mesa_glsl_parse_state *state);

-

-   ast_fully_specified_type *type;

-   char *identifier;

-   int is_array;

-   ast_expression *array_size;

-

-   static void parameters_to_hir(exec_list *ast_parameters,

-				 bool formal, exec_list *ir_parameters,

-				 struct _mesa_glsl_parse_state *state);

-

-private:

-   /** Is this parameter declaration part of a formal parameter list? */

-   bool formal_parameter;

-

-   /**

-    * Is this parameter 'void' type?

-    *

-    * This field is set by \c ::hir.

-    */

-   bool is_void;

-};

-

-

-class ast_function : public ast_node {

-public:

-   ast_function(void);

-

-   virtual void print(void) const;

-

-   virtual ir_rvalue *hir(exec_list *instructions,

-			  struct _mesa_glsl_parse_state *state);

-

-   ast_fully_specified_type *return_type;

-   char *identifier;

-

-   exec_list parameters;

-

-private:

-   /**

-    * Is this prototype part of the function definition?

-    *

-    * Used by ast_function_definition::hir to process the parameters, etc.

-    * of the function.

-    *

-    * \sa ::hir

-    */

-   bool is_definition;

-

-   /**

-    * Function signature corresponding to this function prototype instance

-    *

-    * Used by ast_function_definition::hir to process the parameters, etc.

-    * of the function.

-    *

-    * \sa ::hir

-    */

-   class ir_function_signature *signature;

-

-   friend class ast_function_definition;

-};

-

-

-class ast_declaration_statement : public ast_node {

-public:

-   ast_declaration_statement(void);

-

-   enum {

-      ast_function,

-      ast_declaration,

-      ast_precision

-   } mode;

-

-   union {

-      class ast_function *function;

-      ast_declarator_list *declarator;

-      ast_type_specifier *type;

-      ast_node *node;

-   } declaration;

-};

-

-

-class ast_expression_statement : public ast_node {

-public:

-   ast_expression_statement(ast_expression *);

-   virtual void print(void) const;

-

-   virtual ir_rvalue *hir(exec_list *instructions,

-			  struct _mesa_glsl_parse_state *state);

-

-   ast_expression *expression;

-};

-

-

-class ast_case_label : public ast_node {

-public:

-

-   /**

-    * An expression of NULL means 'default'.

-    */

-   ast_expression *expression;

-};

-

-class ast_selection_statement : public ast_node {

-public:

-   ast_selection_statement(ast_expression *condition,

-			   ast_node *then_statement,

-			   ast_node *else_statement);

-   virtual void print(void) const;

-

-   virtual ir_rvalue *hir(exec_list *instructions,

-			  struct _mesa_glsl_parse_state *state);

-

-   ast_expression *condition;

-   ast_node *then_statement;

-   ast_node *else_statement;

-};

-

-

-class ast_switch_statement : public ast_node {

-public:

-   ast_expression *expression;

-   exec_list statements;

-};

-

-class ast_iteration_statement : public ast_node {

-public:

-   ast_iteration_statement(int mode, ast_node *init, ast_node *condition,

-			   ast_expression *rest_expression, ast_node *body);

-

-   virtual void print(void) const;

-

-   virtual ir_rvalue *hir(exec_list *, struct _mesa_glsl_parse_state *);

-

-   enum ast_iteration_modes {

-      ast_for,

-      ast_while,

-      ast_do_while

-   } mode;

-   

-

-   ast_node *init_statement;

-   ast_node *condition;

-   ast_expression *rest_expression;

-

-   ast_node *body;

-

-private:

-   /**

-    * Generate IR from the condition of a loop

-    *

-    * This is factored out of ::hir because some loops have the condition

-    * test at the top (for and while), and others have it at the end (do-while).

-    */

-   void condition_to_hir(class ir_loop *, struct _mesa_glsl_parse_state *);

-};

-

-

-class ast_jump_statement : public ast_node {

-public:

-   ast_jump_statement(int mode, ast_expression *return_value);

-   virtual void print(void) const;

-

-   virtual ir_rvalue *hir(exec_list *instructions,

-			  struct _mesa_glsl_parse_state *state);

-

-   enum ast_jump_modes {

-      ast_continue,

-      ast_break,

-      ast_return,

-      ast_discard

-   } mode;

-

-   ast_expression *opt_return_value;

-};

-

-

-class ast_function_definition : public ast_node {

-public:

-   virtual void print(void) const;

-

-   virtual ir_rvalue *hir(exec_list *instructions,

-			  struct _mesa_glsl_parse_state *state);

-

-   ast_function *prototype;

-   ast_compound_statement *body;

-};

-/*@}*/

-

-extern void

-_mesa_ast_to_hir(exec_list *instructions, struct _mesa_glsl_parse_state *state);

-

-extern ir_rvalue *

-_mesa_ast_field_selection_to_hir(const ast_expression *expr,

-				 exec_list *instructions,

-				 struct _mesa_glsl_parse_state *state);

-

-void

-emit_function(_mesa_glsl_parse_state *state, exec_list *instructions,

-	      ir_function *f);

-

-#endif /* AST_H */

+/* -*- c++ -*- */
+/*
+ * Copyright © 2009 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 AST_H
+#define AST_H
+
+#include "list.h"
+#include "glsl_parser_extras.h"
+
+struct _mesa_glsl_parse_state;
+
+struct YYLTYPE;
+
+/**
+ * \defgroup AST Abstract syntax tree node definitions
+ *
+ * An abstract syntax tree is generated by the parser.  This is a fairly
+ * direct representation of the gramma derivation for the source program.
+ * No symantic checking is done during the generation of the AST.  Only
+ * syntactic checking is done.  Symantic checking is performed by a later
+ * stage that converts the AST to a more generic intermediate representation.
+ *
+ *@{
+ */
+/**
+ * Base class of all abstract syntax tree nodes
+ */
+class ast_node {
+public:
+   /* Callers of this talloc-based new need not call delete. It's
+    * easier to just talloc_free 'ctx' (or any of its ancestors). */
+   static void* operator new(size_t size, void *ctx)
+   {
+      void *node;
+
+      node = talloc_zero_size(ctx, size);
+      assert(node != NULL);
+
+      return node;
+   }
+
+   /* If the user *does* call delete, that's OK, we will just
+    * talloc_free in that case. */
+   static void operator delete(void *table)
+   {
+      talloc_free(table);
+   }
+
+   /**
+    * Print an AST node in something approximating the original GLSL code
+    */
+   virtual void print(void) const;
+
+   /**
+    * Convert the AST node to the high-level intermediate representation
+    */
+   virtual ir_rvalue *hir(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state);
+
+   /**
+    * Retrieve the source location of an AST node
+    *
+    * This function is primarily used to get the source position of an AST node
+    * into a form that can be passed to \c _mesa_glsl_error.
+    *
+    * \sa _mesa_glsl_error, ast_node::set_location
+    */
+   struct YYLTYPE get_location(void) const
+   {
+      struct YYLTYPE locp;
+
+      locp.source = this->location.source;
+      locp.first_line = this->location.line;
+      locp.first_column = this->location.column;
+      locp.last_line = locp.first_line;
+      locp.last_column = locp.first_column;
+
+      return locp;
+   }
+
+   /**
+    * Set the source location of an AST node from a parser location
+    *
+    * \sa ast_node::get_location
+    */
+   void set_location(const struct YYLTYPE &locp)
+   {
+      this->location.source = locp.source;
+      this->location.line = locp.first_line;
+      this->location.column = locp.first_column;
+   }
+
+   /**
+    * Source location of the AST node.
+    */
+   struct {
+      unsigned source;    /**< GLSL source number. */
+      unsigned line;      /**< Line number within the source string. */
+      unsigned column;    /**< Column in the line. */
+   } location;
+
+   exec_node link;
+
+protected:
+   /**
+    * The only constructor is protected so that only derived class objects can
+    * be created.
+    */
+   ast_node(void);
+};
+
+
+/**
+ * Operators for AST expression nodes.
+ */
+enum ast_operators {
+   ast_assign,
+   ast_plus,        /**< Unary + operator. */
+   ast_neg,
+   ast_add,
+   ast_sub,
+   ast_mul,
+   ast_div,
+   ast_mod,
+   ast_lshift,
+   ast_rshift,
+   ast_less,
+   ast_greater,
+   ast_lequal,
+   ast_gequal,
+   ast_equal,
+   ast_nequal,
+   ast_bit_and,
+   ast_bit_xor,
+   ast_bit_or,
+   ast_bit_not,
+   ast_logic_and,
+   ast_logic_xor,
+   ast_logic_or,
+   ast_logic_not,
+
+   ast_mul_assign,
+   ast_div_assign,
+   ast_mod_assign,
+   ast_add_assign,
+   ast_sub_assign,
+   ast_ls_assign,
+   ast_rs_assign,
+   ast_and_assign,
+   ast_xor_assign,
+   ast_or_assign,
+
+   ast_conditional,
+
+   ast_pre_inc,
+   ast_pre_dec,
+   ast_post_inc,
+   ast_post_dec,
+   ast_field_selection,
+   ast_array_index,
+
+   ast_function_call,
+
+   ast_identifier,
+   ast_int_constant,
+   ast_uint_constant,
+   ast_float_constant,
+   ast_bool_constant,
+
+   ast_sequence
+};
+
+/**
+ * Representation of any sort of expression.
+ */
+class ast_expression : public ast_node {
+public:
+   ast_expression(int oper, ast_expression *,
+		  ast_expression *, ast_expression *);
+
+   ast_expression(const char *identifier) :
+      oper(ast_identifier)
+   {
+      subexpressions[0] = NULL;
+      subexpressions[1] = NULL;
+      subexpressions[2] = NULL;
+      primary_expression.identifier = (char *) identifier;
+   }
+
+   static const char *operator_string(enum ast_operators op);
+
+   virtual ir_rvalue *hir(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state);
+
+   virtual void print(void) const;
+
+   enum ast_operators oper;
+
+   ast_expression *subexpressions[3];
+
+   union {
+      char *identifier;
+      int int_constant;
+      float float_constant;
+      unsigned uint_constant;
+      int bool_constant;
+   } primary_expression;
+
+
+   /**
+    * List of expressions for an \c ast_sequence or parameters for an
+    * \c ast_function_call
+    */
+   exec_list expressions;
+};
+
+class ast_expression_bin : public ast_expression {
+public:
+   ast_expression_bin(int oper, ast_expression *, ast_expression *);
+
+   virtual void print(void) const;
+};
+
+/**
+ * Subclass of expressions for function calls
+ */
+class ast_function_expression : public ast_expression {
+public:
+   ast_function_expression(ast_expression *callee)
+      : ast_expression(ast_function_call, callee,
+		       NULL, NULL),
+	cons(false)
+   {
+      /* empty */
+   }
+
+   ast_function_expression(class ast_type_specifier *type)
+      : ast_expression(ast_function_call, (ast_expression *) type,
+		       NULL, NULL),
+	cons(true)
+   {
+      /* empty */
+   }
+
+   bool is_constructor() const
+   {
+      return cons;
+   }
+
+   virtual ir_rvalue *hir(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state);
+
+private:
+   /**
+    * Is this function call actually a constructor?
+    */
+   bool cons;
+};
+
+
+/**
+ * Number of possible operators for an ast_expression
+ *
+ * This is done as a define instead of as an additional value in the enum so
+ * that the compiler won't generate spurious messages like "warning:
+ * enumeration value ‘ast_num_operators’ not handled in switch"
+ */
+#define AST_NUM_OPERATORS (ast_sequence + 1)
+
+
+class ast_compound_statement : public ast_node {
+public:
+   ast_compound_statement(int new_scope, ast_node *statements);
+   virtual void print(void) const;
+
+   virtual ir_rvalue *hir(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state);
+
+   int new_scope;
+   exec_list statements;
+};
+
+class ast_declaration : public ast_node {
+public:
+   ast_declaration(char *identifier, int is_array, ast_expression *array_size,
+		   ast_expression *initializer);
+   virtual void print(void) const;
+
+   char *identifier;
+   
+   int is_array;
+   ast_expression *array_size;
+
+   ast_expression *initializer;
+};
+
+
+enum {
+   ast_precision_none = 0, /**< Absence of precision qualifier. */
+   ast_precision_high,
+   ast_precision_medium,
+   ast_precision_low
+};
+
+struct ast_type_qualifier {
+   union {
+      struct {
+	 unsigned invariant:1;
+	 unsigned constant:1;
+	 unsigned attribute:1;
+	 unsigned varying:1;
+	 unsigned in:1;
+	 unsigned out:1;
+	 unsigned centroid:1;
+	 unsigned uniform:1;
+	 unsigned smooth:1;
+	 unsigned flat:1;
+	 unsigned noperspective:1;
+
+	 /** \name Layout qualifiers for GL_ARB_fragment_coord_conventions */
+	 /*@{*/
+	 unsigned origin_upper_left:1;
+	 unsigned pixel_center_integer:1;
+	 /*@}*/
+
+	 /**
+	  * Flag set if GL_ARB_explicit_attrib_location "location" layout
+	  * qualifier is used.
+	  */
+	 unsigned explicit_location:1;
+      }
+      /** \brief Set of flags, accessed by name. */
+      q;
+
+      /** \brief Set of flags, accessed as a bitmask. */
+      unsigned i;
+   } flags;
+
+   /**
+    * Location specified via GL_ARB_explicit_attrib_location layout
+    *
+    * \note
+    * This field is only valid if \c explicit_location is set.
+    */
+   unsigned location;
+
+   /**
+    * Return true if and only if an interpolation qualifier is present.
+    */
+   bool has_interpolation() const;
+
+   /**
+    * \brief Return string representation of interpolation qualifier.
+    *
+    * If an interpolation qualifier is present, then return that qualifier's
+    * string representation. Otherwise, return null. For example, if the
+    * noperspective bit is set, then this returns "noperspective".
+    *
+    * If multiple interpolation qualifiers are somehow present, then the
+    * returned string is undefined but not null.
+    */
+   const char *interpolation_string() const;
+};
+
+class ast_struct_specifier : public ast_node {
+public:
+   ast_struct_specifier(char *identifier, ast_node *declarator_list);
+   virtual void print(void) const;
+
+   virtual ir_rvalue *hir(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state);
+
+   char *name;
+   exec_list declarations;
+};
+
+
+enum ast_types {
+   ast_void,
+   ast_float,
+   ast_int,
+   ast_uint,
+   ast_bool,
+   ast_vec2,
+   ast_vec3,
+   ast_vec4,
+   ast_bvec2,
+   ast_bvec3,
+   ast_bvec4,
+   ast_ivec2,
+   ast_ivec3,
+   ast_ivec4,
+   ast_uvec2,
+   ast_uvec3,
+   ast_uvec4,
+   ast_mat2,
+   ast_mat2x3,
+   ast_mat2x4,
+   ast_mat3x2,
+   ast_mat3,
+   ast_mat3x4,
+   ast_mat4x2,
+   ast_mat4x3,
+   ast_mat4,
+   ast_sampler1d,
+   ast_sampler2d,
+   ast_sampler2drect,
+   ast_sampler3d,
+   ast_samplercube,
+   ast_sampler1dshadow,
+   ast_sampler2dshadow,
+   ast_sampler2drectshadow,
+   ast_samplercubeshadow,
+   ast_sampler1darray,
+   ast_sampler2darray,
+   ast_sampler1darrayshadow,
+   ast_sampler2darrayshadow,
+   ast_isampler1d,
+   ast_isampler2d,
+   ast_isampler3d,
+   ast_isamplercube,
+   ast_isampler1darray,
+   ast_isampler2darray,
+   ast_usampler1d,
+   ast_usampler2d,
+   ast_usampler3d,
+   ast_usamplercube,
+   ast_usampler1darray,
+   ast_usampler2darray,
+
+   ast_struct,
+   ast_type_name
+};
+
+
+class ast_type_specifier : public ast_node {
+public:
+   ast_type_specifier(int specifier);
+
+   /** Construct a type specifier from a type name */
+   ast_type_specifier(const char *name) 
+      : type_specifier(ast_type_name), type_name(name), structure(NULL),
+	is_array(false), array_size(NULL), precision(ast_precision_none),
+	is_precision_statement(false)
+   {
+      /* empty */
+   }
+
+   /** Construct a type specifier from a structure definition */
+   ast_type_specifier(ast_struct_specifier *s)
+      : type_specifier(ast_struct), type_name(s->name), structure(s),
+	is_array(false), array_size(NULL), precision(ast_precision_none),
+	is_precision_statement(false)
+   {
+      /* empty */
+   }
+
+   const struct glsl_type *glsl_type(const char **name,
+				     struct _mesa_glsl_parse_state *state)
+      const;
+
+   virtual void print(void) const;
+
+   ir_rvalue *hir(exec_list *, struct _mesa_glsl_parse_state *);
+
+   enum ast_types type_specifier;
+
+   const char *type_name;
+   ast_struct_specifier *structure;
+
+   int is_array;
+   ast_expression *array_size;
+
+   unsigned precision:2;
+
+   bool is_precision_statement;
+};
+
+
+class ast_fully_specified_type : public ast_node {
+public:
+   virtual void print(void) const;
+   bool has_qualifiers() const;
+
+   ast_type_qualifier qualifier;
+   ast_type_specifier *specifier;
+};
+
+
+class ast_declarator_list : public ast_node {
+public:
+   ast_declarator_list(ast_fully_specified_type *);
+   virtual void print(void) const;
+
+   virtual ir_rvalue *hir(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state);
+
+   ast_fully_specified_type *type;
+   exec_list declarations;
+
+   /**
+    * Special flag for vertex shader "invariant" declarations.
+    *
+    * Vertex shaders can contain "invariant" variable redeclarations that do
+    * not include a type.  For example, "invariant gl_Position;".  This flag
+    * is used to note these cases when no type is specified.
+    */
+   int invariant;
+};
+
+
+class ast_parameter_declarator : public ast_node {
+public:
+   ast_parameter_declarator()
+   {
+      this->identifier = NULL;
+      this->is_array = false;
+      this->array_size = 0;
+   }
+
+   virtual void print(void) const;
+
+   virtual ir_rvalue *hir(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state);
+
+   ast_fully_specified_type *type;
+   char *identifier;
+   int is_array;
+   ast_expression *array_size;
+
+   static void parameters_to_hir(exec_list *ast_parameters,
+				 bool formal, exec_list *ir_parameters,
+				 struct _mesa_glsl_parse_state *state);
+
+private:
+   /** Is this parameter declaration part of a formal parameter list? */
+   bool formal_parameter;
+
+   /**
+    * Is this parameter 'void' type?
+    *
+    * This field is set by \c ::hir.
+    */
+   bool is_void;
+};
+
+
+class ast_function : public ast_node {
+public:
+   ast_function(void);
+
+   virtual void print(void) const;
+
+   virtual ir_rvalue *hir(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state);
+
+   ast_fully_specified_type *return_type;
+   char *identifier;
+
+   exec_list parameters;
+
+private:
+   /**
+    * Is this prototype part of the function definition?
+    *
+    * Used by ast_function_definition::hir to process the parameters, etc.
+    * of the function.
+    *
+    * \sa ::hir
+    */
+   bool is_definition;
+
+   /**
+    * Function signature corresponding to this function prototype instance
+    *
+    * Used by ast_function_definition::hir to process the parameters, etc.
+    * of the function.
+    *
+    * \sa ::hir
+    */
+   class ir_function_signature *signature;
+
+   friend class ast_function_definition;
+};
+
+
+class ast_declaration_statement : public ast_node {
+public:
+   ast_declaration_statement(void);
+
+   enum {
+      ast_function,
+      ast_declaration,
+      ast_precision
+   } mode;
+
+   union {
+      class ast_function *function;
+      ast_declarator_list *declarator;
+      ast_type_specifier *type;
+      ast_node *node;
+   } declaration;
+};
+
+
+class ast_expression_statement : public ast_node {
+public:
+   ast_expression_statement(ast_expression *);
+   virtual void print(void) const;
+
+   virtual ir_rvalue *hir(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state);
+
+   ast_expression *expression;
+};
+
+
+class ast_case_label : public ast_node {
+public:
+
+   /**
+    * An expression of NULL means 'default'.
+    */
+   ast_expression *expression;
+};
+
+class ast_selection_statement : public ast_node {
+public:
+   ast_selection_statement(ast_expression *condition,
+			   ast_node *then_statement,
+			   ast_node *else_statement);
+   virtual void print(void) const;
+
+   virtual ir_rvalue *hir(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state);
+
+   ast_expression *condition;
+   ast_node *then_statement;
+   ast_node *else_statement;
+};
+
+
+class ast_switch_statement : public ast_node {
+public:
+   ast_expression *expression;
+   exec_list statements;
+};
+
+class ast_iteration_statement : public ast_node {
+public:
+   ast_iteration_statement(int mode, ast_node *init, ast_node *condition,
+			   ast_expression *rest_expression, ast_node *body);
+
+   virtual void print(void) const;
+
+   virtual ir_rvalue *hir(exec_list *, struct _mesa_glsl_parse_state *);
+
+   enum ast_iteration_modes {
+      ast_for,
+      ast_while,
+      ast_do_while
+   } mode;
+   
+
+   ast_node *init_statement;
+   ast_node *condition;
+   ast_expression *rest_expression;
+
+   ast_node *body;
+
+private:
+   /**
+    * Generate IR from the condition of a loop
+    *
+    * This is factored out of ::hir because some loops have the condition
+    * test at the top (for and while), and others have it at the end (do-while).
+    */
+   void condition_to_hir(class ir_loop *, struct _mesa_glsl_parse_state *);
+};
+
+
+class ast_jump_statement : public ast_node {
+public:
+   ast_jump_statement(int mode, ast_expression *return_value);
+   virtual void print(void) const;
+
+   virtual ir_rvalue *hir(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state);
+
+   enum ast_jump_modes {
+      ast_continue,
+      ast_break,
+      ast_return,
+      ast_discard
+   } mode;
+
+   ast_expression *opt_return_value;
+};
+
+
+class ast_function_definition : public ast_node {
+public:
+   virtual void print(void) const;
+
+   virtual ir_rvalue *hir(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state);
+
+   ast_function *prototype;
+   ast_compound_statement *body;
+};
+/*@}*/
+
+extern void
+_mesa_ast_to_hir(exec_list *instructions, struct _mesa_glsl_parse_state *state);
+
+extern ir_rvalue *
+_mesa_ast_field_selection_to_hir(const ast_expression *expr,
+				 exec_list *instructions,
+				 struct _mesa_glsl_parse_state *state);
+
+void
+emit_function(_mesa_glsl_parse_state *state, exec_list *instructions,
+	      ir_function *f);
+
+#endif /* AST_H */