svn merge ^/branches/released .

1 files changed, 788 insertions, 786 deletions

diff --git a/mesalib/src/glsl/glsl_parser_extras.cpp b/mesalib/src/glsl/glsl_parser_extras.cpp
index 373c9008b..77885d4e1 100644
--- a/mesalib/src/glsl/glsl_parser_extras.cpp
+++ b/mesalib/src/glsl/glsl_parser_extras.cpp
@@ -1,786 +1,788 @@
-/*

- * Copyright © 2008, 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.

- */

-#include <stdio.h>

-#include <stdarg.h>

-#include <string.h>

-#include <assert.h>

-

-extern "C" {

-#include <talloc.h>

-#include "main/core.h" /* for struct gl_context */

-}

-

-#include "ast.h"

-#include "glsl_parser_extras.h"

-#include "glsl_parser.h"

-#include "ir_optimization.h"

-#include "loop_analysis.h"

-

-_mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *ctx,

-					       GLenum target, void *mem_ctx)

-{

-   switch (target) {

-   case GL_VERTEX_SHADER:   this->target = vertex_shader; break;

-   case GL_FRAGMENT_SHADER: this->target = fragment_shader; break;

-   case GL_GEOMETRY_SHADER: this->target = geometry_shader; break;

-   }

-

-   this->scanner = NULL;

-   this->translation_unit.make_empty();

-   this->symbols = new(mem_ctx) glsl_symbol_table;

-   this->info_log = talloc_strdup(mem_ctx, "");

-   this->error = false;

-   this->loop_or_switch_nesting = NULL;

-

-   /* Set default language version and extensions */

-   this->language_version = 110;

-   this->es_shader = false;

-   this->ARB_texture_rectangle_enable = true;

-

-   /* OpenGL ES 2.0 has different defaults from desktop GL. */

-   if (ctx->API == API_OPENGLES2) {

-      this->language_version = 100;

-      this->es_shader = true;

-      this->ARB_texture_rectangle_enable = false;

-   }

-

-   this->extensions = &ctx->Extensions;

-

-   this->Const.MaxLights = ctx->Const.MaxLights;

-   this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;

-   this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;

-   this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;

-   this->Const.MaxVertexAttribs = ctx->Const.VertexProgram.MaxAttribs;

-   this->Const.MaxVertexUniformComponents = ctx->Const.VertexProgram.MaxUniformComponents;

-   this->Const.MaxVaryingFloats = ctx->Const.MaxVarying * 4;

-   this->Const.MaxVertexTextureImageUnits = ctx->Const.MaxVertexTextureImageUnits;

-   this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;

-   this->Const.MaxTextureImageUnits = ctx->Const.MaxTextureImageUnits;

-   this->Const.MaxFragmentUniformComponents = ctx->Const.FragmentProgram.MaxUniformComponents;

-

-   this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;

-}

-

-const char *

-_mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target)

-{

-   switch (target) {

-   case vertex_shader:   return "vertex";

-   case fragment_shader: return "fragment";

-   case geometry_shader: return "geometry";

-   }

-

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

-   return "unknown";

-}

-

-

-void

-_mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,

-		 const char *fmt, ...)

-{

-   va_list ap;

-

-   state->error = true;

-

-   assert(state->info_log != NULL);

-   state->info_log = talloc_asprintf_append(state->info_log,

-					    "%u:%u(%u): error: ",

-					    locp->source,

-					    locp->first_line,

-					    locp->first_column);

-   va_start(ap, fmt);

-   state->info_log = talloc_vasprintf_append(state->info_log, fmt, ap);

-   va_end(ap);

-   state->info_log = talloc_strdup_append(state->info_log, "\n");

-}

-

-

-void

-_mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,

-		   const char *fmt, ...)

-{

-   va_list ap;

-

-   assert(state->info_log != NULL);

-   state->info_log = talloc_asprintf_append(state->info_log,

-					    "%u:%u(%u): warning: ",

-					    locp->source,

-					    locp->first_line,

-					    locp->first_column);

-   va_start(ap, fmt);

-   state->info_log = talloc_vasprintf_append(state->info_log, fmt, ap);

-   va_end(ap);

-   state->info_log = talloc_strdup_append(state->info_log, "\n");

-}

-

-

-bool

-_mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,

-			     const char *behavior, YYLTYPE *behavior_locp,

-			     _mesa_glsl_parse_state *state)

-{

-   enum {

-      extension_disable,

-      extension_enable,

-      extension_require,

-      extension_warn

-   } ext_mode;

-

-   if (strcmp(behavior, "warn") == 0) {

-      ext_mode = extension_warn;

-   } else if (strcmp(behavior, "require") == 0) {

-      ext_mode = extension_require;

-   } else if (strcmp(behavior, "enable") == 0) {

-      ext_mode = extension_enable;

-   } else if (strcmp(behavior, "disable") == 0) {

-      ext_mode = extension_disable;

-   } else {

-      _mesa_glsl_error(behavior_locp, state,

-		       "Unknown extension behavior `%s'",

-		       behavior);

-      return false;

-   }

-

-   bool unsupported = false;

-

-   if (strcmp(name, "all") == 0) {

-      if ((ext_mode == extension_enable) || (ext_mode == extension_require)) {

-	 _mesa_glsl_error(name_locp, state, "Cannot %s all extensions",

-			  (ext_mode == extension_enable)

-			  ? "enable" : "require");

-	 return false;

-      }

-   } else if (strcmp(name, "GL_ARB_draw_buffers") == 0) {

-      /* This extension is only supported in fragment shaders.

-       */

-      if (state->target != fragment_shader) {

-	 unsupported = true;

-      } else {

-	 state->ARB_draw_buffers_enable = (ext_mode != extension_disable);

-	 state->ARB_draw_buffers_warn = (ext_mode == extension_warn);

-      }

-   } else if (strcmp(name, "GL_ARB_draw_instanced") == 0) {

-      /* This extension is only supported in vertex shaders.

-       */

-      if (state->target != vertex_shader) {

-	 unsupported = true;

-      } else {

-	 state->ARB_draw_instanced_enable = (ext_mode != extension_disable);

-	 state->ARB_draw_instanced_warn = (ext_mode == extension_warn);

-      }

-   } else if (strcmp(name, "GL_ARB_explicit_attrib_location") == 0) {

-      state->ARB_explicit_attrib_location_enable =

-	 (ext_mode != extension_disable);

-      state->ARB_explicit_attrib_location_warn =

-	 (ext_mode == extension_warn);

-

-      unsupported = !state->extensions->ARB_explicit_attrib_location;

-   } else if (strcmp(name, "GL_ARB_fragment_coord_conventions") == 0) {

-      state->ARB_fragment_coord_conventions_enable =

-	 (ext_mode != extension_disable);

-      state->ARB_fragment_coord_conventions_warn =

-	 (ext_mode == extension_warn);

-

-      unsupported = !state->extensions->ARB_fragment_coord_conventions;

-   } else if (strcmp(name, "GL_ARB_texture_rectangle") == 0) {

-      state->ARB_texture_rectangle_enable = (ext_mode != extension_disable);

-      state->ARB_texture_rectangle_warn = (ext_mode == extension_warn);

-   } else if (strcmp(name, "GL_EXT_texture_array") == 0) {

-      state->EXT_texture_array_enable = (ext_mode != extension_disable);

-      state->EXT_texture_array_warn = (ext_mode == extension_warn);

-

-      unsupported = !state->extensions->EXT_texture_array;

-   } else if (strcmp(name, "GL_ARB_shader_stencil_export") == 0) {

-      if (state->target != fragment_shader) {

-	 unsupported = true;

-      } else {

-	 state->ARB_shader_stencil_export_enable = (ext_mode != extension_disable);

-	 state->ARB_shader_stencil_export_warn = (ext_mode == extension_warn);

-	 unsupported = !state->extensions->ARB_shader_stencil_export;

-      }

-   } else {

-      unsupported = true;

-   }

-

-   if (unsupported) {

-      static const char *const fmt = "extension `%s' unsupported in %s shader";

-

-      if (ext_mode == extension_require) {

-	 _mesa_glsl_error(name_locp, state, fmt,

-			  name, _mesa_glsl_shader_target_name(state->target));

-	 return false;

-      } else {

-	 _mesa_glsl_warning(name_locp, state, fmt,

-			    name, _mesa_glsl_shader_target_name(state->target));

-      }

-   }

-

-   return true;

-}

-

-void

-_mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)

-{

-   if (q->flags.q.constant)

-      printf("const ");

-

-   if (q->flags.q.invariant)

-      printf("invariant ");

-

-   if (q->flags.q.attribute)

-      printf("attribute ");

-

-   if (q->flags.q.varying)

-      printf("varying ");

-

-   if (q->flags.q.in && q->flags.q.out)

-      printf("inout ");

-   else {

-      if (q->flags.q.in)

-	 printf("in ");

-

-      if (q->flags.q.out)

-	 printf("out ");

-   }

-

-   if (q->flags.q.centroid)

-      printf("centroid ");

-   if (q->flags.q.uniform)

-      printf("uniform ");

-   if (q->flags.q.smooth)

-      printf("smooth ");

-   if (q->flags.q.flat)

-      printf("flat ");

-   if (q->flags.q.noperspective)

-      printf("noperspective ");

-}

-

-

-void

-ast_node::print(void) const

-{

-   printf("unhandled node ");

-}

-

-

-ast_node::ast_node(void)

-{

-   this->location.source = 0;

-   this->location.line = 0;

-   this->location.column = 0;

-}

-

-

-static void

-ast_opt_array_size_print(bool is_array, const ast_expression *array_size)

-{

-   if (is_array) {

-      printf("[ ");

-

-      if (array_size)

-	 array_size->print();

-

-      printf("] ");

-   }

-}

-

-

-void

-ast_compound_statement::print(void) const

-{

-   printf("{\n");

-   

-   foreach_list_const(n, &this->statements) {

-      ast_node *ast = exec_node_data(ast_node, n, link);

-      ast->print();

-   }

-

-   printf("}\n");

-}

-

-

-ast_compound_statement::ast_compound_statement(int new_scope,

-					       ast_node *statements)

-{

-   this->new_scope = new_scope;

-

-   if (statements != NULL) {

-      this->statements.push_degenerate_list_at_head(&statements->link);

-   }

-}

-

-

-void

-ast_expression::print(void) const

-{

-   switch (oper) {

-   case ast_assign:

-   case ast_mul_assign:

-   case ast_div_assign:

-   case ast_mod_assign:

-   case ast_add_assign:

-   case ast_sub_assign:

-   case ast_ls_assign:

-   case ast_rs_assign:

-   case ast_and_assign:

-   case ast_xor_assign:

-   case ast_or_assign:

-      subexpressions[0]->print();

-      printf("%s ", operator_string(oper));

-      subexpressions[1]->print();

-      break;

-

-   case ast_field_selection:

-      subexpressions[0]->print();

-      printf(". %s ", primary_expression.identifier);

-      break;

-

-   case ast_plus:

-   case ast_neg:

-   case ast_bit_not:

-   case ast_logic_not:

-   case ast_pre_inc:

-   case ast_pre_dec:

-      printf("%s ", operator_string(oper));

-      subexpressions[0]->print();

-      break;

-

-   case ast_post_inc:

-   case ast_post_dec:

-      subexpressions[0]->print();

-      printf("%s ", operator_string(oper));

-      break;

-

-   case ast_conditional:

-      subexpressions[0]->print();

-      printf("? ");

-      subexpressions[1]->print();

-      printf(": ");

-      subexpressions[1]->print();

-      break;

-

-   case ast_array_index:

-      subexpressions[0]->print();

-      printf("[ ");

-      subexpressions[1]->print();

-      printf("] ");

-      break;

-

-   case ast_function_call: {

-      subexpressions[0]->print();

-      printf("( ");

-

-      foreach_list_const (n, &this->expressions) {

-	 if (n != this->expressions.get_head())

-	    printf(", ");

-

-	 ast_node *ast = exec_node_data(ast_node, n, link);

-	 ast->print();

-      }

-

-      printf(") ");

-      break;

-   }

-

-   case ast_identifier:

-      printf("%s ", primary_expression.identifier);

-      break;

-

-   case ast_int_constant:

-      printf("%d ", primary_expression.int_constant);

-      break;

-

-   case ast_uint_constant:

-      printf("%u ", primary_expression.uint_constant);

-      break;

-

-   case ast_float_constant:

-      printf("%f ", primary_expression.float_constant);

-      break;

-

-   case ast_bool_constant:

-      printf("%s ",

-	     primary_expression.bool_constant

-	     ? "true" : "false");

-      break;

-

-   case ast_sequence: {

-      printf("( ");

-      foreach_list_const(n, & this->expressions) {

-	 if (n != this->expressions.get_head())

-	    printf(", ");

-

-	 ast_node *ast = exec_node_data(ast_node, n, link);

-	 ast->print();

-      }

-      printf(") ");

-      break;

-   }

-

-   default:

-      assert(0);

-      break;

-   }

-}

-

-ast_expression::ast_expression(int oper,

-			       ast_expression *ex0,

-			       ast_expression *ex1,

-			       ast_expression *ex2)

-{

-   this->oper = ast_operators(oper);

-   this->subexpressions[0] = ex0;

-   this->subexpressions[1] = ex1;

-   this->subexpressions[2] = ex2;

-}

-

-

-void

-ast_expression_statement::print(void) const

-{

-   if (expression)

-      expression->print();

-

-   printf("; ");

-}

-

-

-ast_expression_statement::ast_expression_statement(ast_expression *ex) :

-   expression(ex)

-{

-   /* empty */

-}

-

-

-void

-ast_function::print(void) const

-{

-   return_type->print();

-   printf(" %s (", identifier);

-

-   foreach_list_const(n, & this->parameters) {

-      ast_node *ast = exec_node_data(ast_node, n, link);

-      ast->print();

-   }

-

-   printf(")");

-}

-

-

-ast_function::ast_function(void)

-   : is_definition(false), signature(NULL)

-{

-   /* empty */

-}

-

-

-void

-ast_fully_specified_type::print(void) const

-{

-   _mesa_ast_type_qualifier_print(& qualifier);

-   specifier->print();

-}

-

-

-void

-ast_parameter_declarator::print(void) const

-{

-   type->print();

-   if (identifier)

-      printf("%s ", identifier);

-   ast_opt_array_size_print(is_array, array_size);

-}

-

-

-void

-ast_function_definition::print(void) const

-{

-   prototype->print();

-   body->print();

-}

-

-

-void

-ast_declaration::print(void) const

-{

-   printf("%s ", identifier);

-   ast_opt_array_size_print(is_array, array_size);

-

-   if (initializer) {

-      printf("= ");

-      initializer->print();

-   }

-}

-

-

-ast_declaration::ast_declaration(char *identifier, int is_array,

-				 ast_expression *array_size,

-				 ast_expression *initializer)

-{

-   this->identifier = identifier;

-   this->is_array = is_array;

-   this->array_size = array_size;

-   this->initializer = initializer;

-}

-

-

-void

-ast_declarator_list::print(void) const

-{

-   assert(type || invariant);

-

-   if (type)

-      type->print();

-   else

-      printf("invariant ");

-

-   foreach_list_const (ptr, & this->declarations) {

-      if (ptr != this->declarations.get_head())

-	 printf(", ");

-

-      ast_node *ast = exec_node_data(ast_node, ptr, link);

-      ast->print();

-   }

-

-   printf("; ");

-}

-

-

-ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)

-{

-   this->type = type;

-   this->invariant = false;

-}

-

-void

-ast_jump_statement::print(void) const

-{

-   switch (mode) {

-   case ast_continue:

-      printf("continue; ");

-      break;

-   case ast_break:

-      printf("break; ");

-      break;

-   case ast_return:

-      printf("return ");

-      if (opt_return_value)

-	 opt_return_value->print();

-

-      printf("; ");

-      break;

-   case ast_discard:

-      printf("discard; ");

-      break;

-   }

-}

-

-

-ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)

-{

-   this->mode = ast_jump_modes(mode);

-

-   if (mode == ast_return)

-      opt_return_value = return_value;

-}

-

-

-void

-ast_selection_statement::print(void) const

-{

-   printf("if ( ");

-   condition->print();

-   printf(") ");

-

-   then_statement->print();

-

-   if (else_statement) {

-      printf("else ");

-      else_statement->print();

-   }

-   

-}

-

-

-ast_selection_statement::ast_selection_statement(ast_expression *condition,

-						 ast_node *then_statement,

-						 ast_node *else_statement)

-{

-   this->condition = condition;

-   this->then_statement = then_statement;

-   this->else_statement = else_statement;

-}

-

-

-void

-ast_iteration_statement::print(void) const

-{

-   switch (mode) {

-   case ast_for:

-      printf("for( ");

-      if (init_statement)

-	 init_statement->print();

-      printf("; ");

-

-      if (condition)

-	 condition->print();

-      printf("; ");

-

-      if (rest_expression)

-	 rest_expression->print();

-      printf(") ");

-

-      body->print();

-      break;

-

-   case ast_while:

-      printf("while ( ");

-      if (condition)

-	 condition->print();

-      printf(") ");

-      body->print();

-      break;

-

-   case ast_do_while:

-      printf("do ");

-      body->print();

-      printf("while ( ");

-      if (condition)

-	 condition->print();

-      printf("); ");

-      break;

-   }

-}

-

-

-ast_iteration_statement::ast_iteration_statement(int mode,

-						 ast_node *init,

-						 ast_node *condition,

-						 ast_expression *rest_expression,

-						 ast_node *body)

-{

-   this->mode = ast_iteration_modes(mode);

-   this->init_statement = init;

-   this->condition = condition;

-   this->rest_expression = rest_expression;

-   this->body = body;

-}

-

-

-void

-ast_struct_specifier::print(void) const

-{

-   printf("struct %s { ", name);

-   foreach_list_const(n, &this->declarations) {

-      ast_node *ast = exec_node_data(ast_node, n, link);

-      ast->print();

-   }

-   printf("} ");

-}

-

-

-ast_struct_specifier::ast_struct_specifier(char *identifier,

-					   ast_node *declarator_list)

-{

-   if (identifier == NULL) {

-      static unsigned anon_count = 1;

-      identifier = talloc_asprintf(this, "#anon_struct_%04x", anon_count);

-      anon_count++;

-   }

-   name = identifier;

-   this->declarations.push_degenerate_list_at_head(&declarator_list->link);

-}

-

-bool

-do_common_optimization(exec_list *ir, bool linked, unsigned max_unroll_iterations)

-{

-   GLboolean progress = GL_FALSE;

-

-   progress = lower_instructions(ir, SUB_TO_ADD_NEG) || progress;

-

-   if (linked) {

-      progress = do_function_inlining(ir) || progress;

-      progress = do_dead_functions(ir) || progress;

-   }

-   progress = do_structure_splitting(ir) || progress;

-   progress = do_if_simplification(ir) || progress;

-   progress = do_discard_simplification(ir) || progress;

-   progress = do_copy_propagation(ir) || progress;

-   if (linked)

-      progress = do_dead_code(ir) || progress;

-   else

-      progress = do_dead_code_unlinked(ir) || progress;

-   progress = do_dead_code_local(ir) || progress;

-   progress = do_tree_grafting(ir) || progress;

-   progress = do_constant_propagation(ir) || progress;

-   if (linked)

-      progress = do_constant_variable(ir) || progress;

-   else

-      progress = do_constant_variable_unlinked(ir) || progress;

-   progress = do_constant_folding(ir) || progress;

-   progress = do_algebraic(ir) || progress;

-   progress = do_lower_jumps(ir) || progress;

-   progress = do_vec_index_to_swizzle(ir) || progress;

-   progress = do_swizzle_swizzle(ir) || progress;

-   progress = do_noop_swizzle(ir) || progress;

-

-   progress = optimize_redundant_jumps(ir) || progress;

-

-   loop_state *ls = analyze_loop_variables(ir);

-   progress = set_loop_controls(ir, ls) || progress;

-   progress = unroll_loops(ir, ls, max_unroll_iterations) || progress;

-   delete ls;

-

-   return progress;

-}

-

-extern "C" {

-

-/**

- * To be called at GL teardown time, this frees compiler datastructures.

- *

- * After calling this, any previously compiled shaders and shader

- * programs would be invalid.  So this should happen at approximately

- * program exit.

- */

-void

-_mesa_destroy_shader_compiler(void)

-{

-   _mesa_destroy_shader_compiler_caches();

-

-   _mesa_glsl_release_types();

-}

-

-/**

- * Releases compiler caches to trade off performance for memory.

- *

- * Intended to be used with glReleaseShaderCompiler().

- */

-void

-_mesa_destroy_shader_compiler_caches(void)

-{

-   _mesa_glsl_release_functions();

-}

-

-}

+/*
+ * Copyright © 2008, 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.
+ */
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <assert.h>
+
+extern "C" {
+#include <talloc.h>
+#include "main/core.h" /* for struct gl_context */
+}
+
+#include "ast.h"
+#include "glsl_parser_extras.h"
+#include "glsl_parser.h"
+#include "ir_optimization.h"
+#include "loop_analysis.h"
+
+_mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *ctx,
+					       GLenum target, void *mem_ctx)
+{
+   switch (target) {
+   case GL_VERTEX_SHADER:   this->target = vertex_shader; break;
+   case GL_FRAGMENT_SHADER: this->target = fragment_shader; break;
+   case GL_GEOMETRY_SHADER: this->target = geometry_shader; break;
+   }
+
+   this->scanner = NULL;
+   this->translation_unit.make_empty();
+   this->symbols = new(mem_ctx) glsl_symbol_table;
+   this->info_log = talloc_strdup(mem_ctx, "");
+   this->error = false;
+   this->loop_or_switch_nesting = NULL;
+
+   /* Set default language version and extensions */
+   this->language_version = 110;
+   this->es_shader = false;
+   this->ARB_texture_rectangle_enable = true;
+
+   /* OpenGL ES 2.0 has different defaults from desktop GL. */
+   if (ctx->API == API_OPENGLES2) {
+      this->language_version = 100;
+      this->es_shader = true;
+      this->ARB_texture_rectangle_enable = false;
+   }
+
+   this->extensions = &ctx->Extensions;
+
+   this->Const.MaxLights = ctx->Const.MaxLights;
+   this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
+   this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
+   this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
+   this->Const.MaxVertexAttribs = ctx->Const.VertexProgram.MaxAttribs;
+   this->Const.MaxVertexUniformComponents = ctx->Const.VertexProgram.MaxUniformComponents;
+   this->Const.MaxVaryingFloats = ctx->Const.MaxVarying * 4;
+   this->Const.MaxVertexTextureImageUnits = ctx->Const.MaxVertexTextureImageUnits;
+   this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
+   this->Const.MaxTextureImageUnits = ctx->Const.MaxTextureImageUnits;
+   this->Const.MaxFragmentUniformComponents = ctx->Const.FragmentProgram.MaxUniformComponents;
+
+   this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
+}
+
+const char *
+_mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target)
+{
+   switch (target) {
+   case vertex_shader:   return "vertex";
+   case fragment_shader: return "fragment";
+   case geometry_shader: return "geometry";
+   }
+
+   assert(!"Should not get here.");
+   return "unknown";
+}
+
+
+void
+_mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
+		 const char *fmt, ...)
+{
+   va_list ap;
+
+   state->error = true;
+
+   assert(state->info_log != NULL);
+   state->info_log = talloc_asprintf_append(state->info_log,
+					    "%u:%u(%u): error: ",
+					    locp->source,
+					    locp->first_line,
+					    locp->first_column);
+   va_start(ap, fmt);
+   state->info_log = talloc_vasprintf_append(state->info_log, fmt, ap);
+   va_end(ap);
+   state->info_log = talloc_strdup_append(state->info_log, "\n");
+}
+
+
+void
+_mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
+		   const char *fmt, ...)
+{
+   va_list ap;
+
+   assert(state->info_log != NULL);
+   state->info_log = talloc_asprintf_append(state->info_log,
+					    "%u:%u(%u): warning: ",
+					    locp->source,
+					    locp->first_line,
+					    locp->first_column);
+   va_start(ap, fmt);
+   state->info_log = talloc_vasprintf_append(state->info_log, fmt, ap);
+   va_end(ap);
+   state->info_log = talloc_strdup_append(state->info_log, "\n");
+}
+
+
+bool
+_mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
+			     const char *behavior, YYLTYPE *behavior_locp,
+			     _mesa_glsl_parse_state *state)
+{
+   enum {
+      extension_disable,
+      extension_enable,
+      extension_require,
+      extension_warn
+   } ext_mode;
+
+   if (strcmp(behavior, "warn") == 0) {
+      ext_mode = extension_warn;
+   } else if (strcmp(behavior, "require") == 0) {
+      ext_mode = extension_require;
+   } else if (strcmp(behavior, "enable") == 0) {
+      ext_mode = extension_enable;
+   } else if (strcmp(behavior, "disable") == 0) {
+      ext_mode = extension_disable;
+   } else {
+      _mesa_glsl_error(behavior_locp, state,
+		       "Unknown extension behavior `%s'",
+		       behavior);
+      return false;
+   }
+
+   bool unsupported = false;
+
+   if (strcmp(name, "all") == 0) {
+      if ((ext_mode == extension_enable) || (ext_mode == extension_require)) {
+	 _mesa_glsl_error(name_locp, state, "Cannot %s all extensions",
+			  (ext_mode == extension_enable)
+			  ? "enable" : "require");
+	 return false;
+      }
+   } else if (strcmp(name, "GL_ARB_draw_buffers") == 0) {
+      /* This extension is only supported in fragment shaders.
+       */
+      if (state->target != fragment_shader) {
+	 unsupported = true;
+      } else {
+	 state->ARB_draw_buffers_enable = (ext_mode != extension_disable);
+	 state->ARB_draw_buffers_warn = (ext_mode == extension_warn);
+      }
+   } else if (strcmp(name, "GL_ARB_draw_instanced") == 0) {
+      /* This extension is only supported in vertex shaders.
+       */
+      if (state->target != vertex_shader) {
+	 unsupported = true;
+      } else {
+	 state->ARB_draw_instanced_enable = (ext_mode != extension_disable);
+	 state->ARB_draw_instanced_warn = (ext_mode == extension_warn);
+      }
+   } else if (strcmp(name, "GL_ARB_explicit_attrib_location") == 0) {
+      state->ARB_explicit_attrib_location_enable =
+	 (ext_mode != extension_disable);
+      state->ARB_explicit_attrib_location_warn =
+	 (ext_mode == extension_warn);
+
+      unsupported = !state->extensions->ARB_explicit_attrib_location;
+   } else if (strcmp(name, "GL_ARB_fragment_coord_conventions") == 0) {
+      state->ARB_fragment_coord_conventions_enable =
+	 (ext_mode != extension_disable);
+      state->ARB_fragment_coord_conventions_warn =
+	 (ext_mode == extension_warn);
+
+      unsupported = !state->extensions->ARB_fragment_coord_conventions;
+   } else if (strcmp(name, "GL_ARB_texture_rectangle") == 0) {
+      state->ARB_texture_rectangle_enable = (ext_mode != extension_disable);
+      state->ARB_texture_rectangle_warn = (ext_mode == extension_warn);
+   } else if (strcmp(name, "GL_EXT_texture_array") == 0) {
+      state->EXT_texture_array_enable = (ext_mode != extension_disable);
+      state->EXT_texture_array_warn = (ext_mode == extension_warn);
+
+      unsupported = !state->extensions->EXT_texture_array;
+   } else if (strcmp(name, "GL_ARB_shader_stencil_export") == 0) {
+      if (state->target != fragment_shader) {
+	 unsupported = true;
+      } else {
+	 state->ARB_shader_stencil_export_enable = (ext_mode != extension_disable);
+	 state->ARB_shader_stencil_export_warn = (ext_mode == extension_warn);
+	 unsupported = !state->extensions->ARB_shader_stencil_export;
+      }
+   } else {
+      unsupported = true;
+   }
+
+   if (unsupported) {
+      static const char *const fmt = "extension `%s' unsupported in %s shader";
+
+      if (ext_mode == extension_require) {
+	 _mesa_glsl_error(name_locp, state, fmt,
+			  name, _mesa_glsl_shader_target_name(state->target));
+	 return false;
+      } else {
+	 _mesa_glsl_warning(name_locp, state, fmt,
+			    name, _mesa_glsl_shader_target_name(state->target));
+      }
+   }
+
+   return true;
+}
+
+void
+_mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
+{
+   if (q->flags.q.constant)
+      printf("const ");
+
+   if (q->flags.q.invariant)
+      printf("invariant ");
+
+   if (q->flags.q.attribute)
+      printf("attribute ");
+
+   if (q->flags.q.varying)
+      printf("varying ");
+
+   if (q->flags.q.in && q->flags.q.out)
+      printf("inout ");
+   else {
+      if (q->flags.q.in)
+	 printf("in ");
+
+      if (q->flags.q.out)
+	 printf("out ");
+   }
+
+   if (q->flags.q.centroid)
+      printf("centroid ");
+   if (q->flags.q.uniform)
+      printf("uniform ");
+   if (q->flags.q.smooth)
+      printf("smooth ");
+   if (q->flags.q.flat)
+      printf("flat ");
+   if (q->flags.q.noperspective)
+      printf("noperspective ");
+}
+
+
+void
+ast_node::print(void) const
+{
+   printf("unhandled node ");
+}
+
+
+ast_node::ast_node(void)
+{
+   this->location.source = 0;
+   this->location.line = 0;
+   this->location.column = 0;
+}
+
+
+static void
+ast_opt_array_size_print(bool is_array, const ast_expression *array_size)
+{
+   if (is_array) {
+      printf("[ ");
+
+      if (array_size)
+	 array_size->print();
+
+      printf("] ");
+   }
+}
+
+
+void
+ast_compound_statement::print(void) const
+{
+   printf("{\n");
+   
+   foreach_list_const(n, &this->statements) {
+      ast_node *ast = exec_node_data(ast_node, n, link);
+      ast->print();
+   }
+
+   printf("}\n");
+}
+
+
+ast_compound_statement::ast_compound_statement(int new_scope,
+					       ast_node *statements)
+{
+   this->new_scope = new_scope;
+
+   if (statements != NULL) {
+      this->statements.push_degenerate_list_at_head(&statements->link);
+   }
+}
+
+
+void
+ast_expression::print(void) const
+{
+   switch (oper) {
+   case ast_assign:
+   case ast_mul_assign:
+   case ast_div_assign:
+   case ast_mod_assign:
+   case ast_add_assign:
+   case ast_sub_assign:
+   case ast_ls_assign:
+   case ast_rs_assign:
+   case ast_and_assign:
+   case ast_xor_assign:
+   case ast_or_assign:
+      subexpressions[0]->print();
+      printf("%s ", operator_string(oper));
+      subexpressions[1]->print();
+      break;
+
+   case ast_field_selection:
+      subexpressions[0]->print();
+      printf(". %s ", primary_expression.identifier);
+      break;
+
+   case ast_plus:
+   case ast_neg:
+   case ast_bit_not:
+   case ast_logic_not:
+   case ast_pre_inc:
+   case ast_pre_dec:
+      printf("%s ", operator_string(oper));
+      subexpressions[0]->print();
+      break;
+
+   case ast_post_inc:
+   case ast_post_dec:
+      subexpressions[0]->print();
+      printf("%s ", operator_string(oper));
+      break;
+
+   case ast_conditional:
+      subexpressions[0]->print();
+      printf("? ");
+      subexpressions[1]->print();
+      printf(": ");
+      subexpressions[1]->print();
+      break;
+
+   case ast_array_index:
+      subexpressions[0]->print();
+      printf("[ ");
+      subexpressions[1]->print();
+      printf("] ");
+      break;
+
+   case ast_function_call: {
+      subexpressions[0]->print();
+      printf("( ");
+
+      foreach_list_const (n, &this->expressions) {
+	 if (n != this->expressions.get_head())
+	    printf(", ");
+
+	 ast_node *ast = exec_node_data(ast_node, n, link);
+	 ast->print();
+      }
+
+      printf(") ");
+      break;
+   }
+
+   case ast_identifier:
+      printf("%s ", primary_expression.identifier);
+      break;
+
+   case ast_int_constant:
+      printf("%d ", primary_expression.int_constant);
+      break;
+
+   case ast_uint_constant:
+      printf("%u ", primary_expression.uint_constant);
+      break;
+
+   case ast_float_constant:
+      printf("%f ", primary_expression.float_constant);
+      break;
+
+   case ast_bool_constant:
+      printf("%s ",
+	     primary_expression.bool_constant
+	     ? "true" : "false");
+      break;
+
+   case ast_sequence: {
+      printf("( ");
+      foreach_list_const(n, & this->expressions) {
+	 if (n != this->expressions.get_head())
+	    printf(", ");
+
+	 ast_node *ast = exec_node_data(ast_node, n, link);
+	 ast->print();
+      }
+      printf(") ");
+      break;
+   }
+
+   default:
+      assert(0);
+      break;
+   }
+}
+
+ast_expression::ast_expression(int oper,
+			       ast_expression *ex0,
+			       ast_expression *ex1,
+			       ast_expression *ex2)
+{
+   this->oper = ast_operators(oper);
+   this->subexpressions[0] = ex0;
+   this->subexpressions[1] = ex1;
+   this->subexpressions[2] = ex2;
+}
+
+
+void
+ast_expression_statement::print(void) const
+{
+   if (expression)
+      expression->print();
+
+   printf("; ");
+}
+
+
+ast_expression_statement::ast_expression_statement(ast_expression *ex) :
+   expression(ex)
+{
+   /* empty */
+}
+
+
+void
+ast_function::print(void) const
+{
+   return_type->print();
+   printf(" %s (", identifier);
+
+   foreach_list_const(n, & this->parameters) {
+      ast_node *ast = exec_node_data(ast_node, n, link);
+      ast->print();
+   }
+
+   printf(")");
+}
+
+
+ast_function::ast_function(void)
+   : is_definition(false), signature(NULL)
+{
+   /* empty */
+}
+
+
+void
+ast_fully_specified_type::print(void) const
+{
+   _mesa_ast_type_qualifier_print(& qualifier);
+   specifier->print();
+}
+
+
+void
+ast_parameter_declarator::print(void) const
+{
+   type->print();
+   if (identifier)
+      printf("%s ", identifier);
+   ast_opt_array_size_print(is_array, array_size);
+}
+
+
+void
+ast_function_definition::print(void) const
+{
+   prototype->print();
+   body->print();
+}
+
+
+void
+ast_declaration::print(void) const
+{
+   printf("%s ", identifier);
+   ast_opt_array_size_print(is_array, array_size);
+
+   if (initializer) {
+      printf("= ");
+      initializer->print();
+   }
+}
+
+
+ast_declaration::ast_declaration(char *identifier, int is_array,
+				 ast_expression *array_size,
+				 ast_expression *initializer)
+{
+   this->identifier = identifier;
+   this->is_array = is_array;
+   this->array_size = array_size;
+   this->initializer = initializer;
+}
+
+
+void
+ast_declarator_list::print(void) const
+{
+   assert(type || invariant);
+
+   if (type)
+      type->print();
+   else
+      printf("invariant ");
+
+   foreach_list_const (ptr, & this->declarations) {
+      if (ptr != this->declarations.get_head())
+	 printf(", ");
+
+      ast_node *ast = exec_node_data(ast_node, ptr, link);
+      ast->print();
+   }
+
+   printf("; ");
+}
+
+
+ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
+{
+   this->type = type;
+   this->invariant = false;
+}
+
+void
+ast_jump_statement::print(void) const
+{
+   switch (mode) {
+   case ast_continue:
+      printf("continue; ");
+      break;
+   case ast_break:
+      printf("break; ");
+      break;
+   case ast_return:
+      printf("return ");
+      if (opt_return_value)
+	 opt_return_value->print();
+
+      printf("; ");
+      break;
+   case ast_discard:
+      printf("discard; ");
+      break;
+   }
+}
+
+
+ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
+{
+   this->mode = ast_jump_modes(mode);
+
+   if (mode == ast_return)
+      opt_return_value = return_value;
+}
+
+
+void
+ast_selection_statement::print(void) const
+{
+   printf("if ( ");
+   condition->print();
+   printf(") ");
+
+   then_statement->print();
+
+   if (else_statement) {
+      printf("else ");
+      else_statement->print();
+   }
+   
+}
+
+
+ast_selection_statement::ast_selection_statement(ast_expression *condition,
+						 ast_node *then_statement,
+						 ast_node *else_statement)
+{
+   this->condition = condition;
+   this->then_statement = then_statement;
+   this->else_statement = else_statement;
+}
+
+
+void
+ast_iteration_statement::print(void) const
+{
+   switch (mode) {
+   case ast_for:
+      printf("for( ");
+      if (init_statement)
+	 init_statement->print();
+      printf("; ");
+
+      if (condition)
+	 condition->print();
+      printf("; ");
+
+      if (rest_expression)
+	 rest_expression->print();
+      printf(") ");
+
+      body->print();
+      break;
+
+   case ast_while:
+      printf("while ( ");
+      if (condition)
+	 condition->print();
+      printf(") ");
+      body->print();
+      break;
+
+   case ast_do_while:
+      printf("do ");
+      body->print();
+      printf("while ( ");
+      if (condition)
+	 condition->print();
+      printf("); ");
+      break;
+   }
+}
+
+
+ast_iteration_statement::ast_iteration_statement(int mode,
+						 ast_node *init,
+						 ast_node *condition,
+						 ast_expression *rest_expression,
+						 ast_node *body)
+{
+   this->mode = ast_iteration_modes(mode);
+   this->init_statement = init;
+   this->condition = condition;
+   this->rest_expression = rest_expression;
+   this->body = body;
+}
+
+
+void
+ast_struct_specifier::print(void) const
+{
+   printf("struct %s { ", name);
+   foreach_list_const(n, &this->declarations) {
+      ast_node *ast = exec_node_data(ast_node, n, link);
+      ast->print();
+   }
+   printf("} ");
+}
+
+
+ast_struct_specifier::ast_struct_specifier(char *identifier,
+					   ast_node *declarator_list)
+{
+   if (identifier == NULL) {
+      static unsigned anon_count = 1;
+      identifier = talloc_asprintf(this, "#anon_struct_%04x", anon_count);
+      anon_count++;
+   }
+   name = identifier;
+   this->declarations.push_degenerate_list_at_head(&declarator_list->link);
+}
+
+bool
+do_common_optimization(exec_list *ir, bool linked, unsigned max_unroll_iterations)
+{
+   GLboolean progress = GL_FALSE;
+
+   progress = lower_instructions(ir, SUB_TO_ADD_NEG) || progress;
+
+   if (linked) {
+      progress = do_function_inlining(ir) || progress;
+      progress = do_dead_functions(ir) || progress;
+   }
+   progress = do_structure_splitting(ir) || progress;
+   progress = do_if_simplification(ir) || progress;
+   progress = do_discard_simplification(ir) || progress;
+   progress = do_copy_propagation(ir) || progress;
+   if (linked)
+      progress = do_dead_code(ir) || progress;
+   else
+      progress = do_dead_code_unlinked(ir) || progress;
+   progress = do_dead_code_local(ir) || progress;
+   progress = do_tree_grafting(ir) || progress;
+   progress = do_constant_propagation(ir) || progress;
+   if (linked)
+      progress = do_constant_variable(ir) || progress;
+   else
+      progress = do_constant_variable_unlinked(ir) || progress;
+   progress = do_constant_folding(ir) || progress;
+   progress = do_algebraic(ir) || progress;
+   progress = do_lower_jumps(ir) || progress;
+   progress = do_vec_index_to_swizzle(ir) || progress;
+   progress = do_swizzle_swizzle(ir) || progress;
+   progress = do_noop_swizzle(ir) || progress;
+
+   progress = optimize_redundant_jumps(ir) || progress;
+
+   loop_state *ls = analyze_loop_variables(ir);
+   if (ls->loop_found) {
+      progress = set_loop_controls(ir, ls) || progress;
+      progress = unroll_loops(ir, ls, max_unroll_iterations) || progress;
+   }
+   delete ls;
+
+   return progress;
+}
+
+extern "C" {
+
+/**
+ * To be called at GL teardown time, this frees compiler datastructures.
+ *
+ * After calling this, any previously compiled shaders and shader
+ * programs would be invalid.  So this should happen at approximately
+ * program exit.
+ */
+void
+_mesa_destroy_shader_compiler(void)
+{
+   _mesa_destroy_shader_compiler_caches();
+
+   _mesa_glsl_release_types();
+}
+
+/**
+ * Releases compiler caches to trade off performance for memory.
+ *
+ * Intended to be used with glReleaseShaderCompiler().
+ */
+void
+_mesa_destroy_shader_compiler_caches(void)
+{
+   _mesa_glsl_release_functions();
+}
+
+}