mesa git update 30 Mar 2011

6 files changed, 5610 insertions, 5602 deletions

diff --git a/mesalib/src/mesa/program/arbprogparse.c b/mesalib/src/mesa/program/arbprogparse.c
index ebbc195bc..7f778c3c3 100644
--- a/mesalib/src/mesa/program/arbprogparse.c
+++ b/mesalib/src/mesa/program/arbprogparse.c
@@ -1,219 +1,222 @@
-/*

- * Mesa 3-D graphics library

- * Version:  7.1

- *

- * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.

- *

- * 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 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

- * BRIAN PAUL 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.

- */

-

-#define DEBUG_PARSING 0

-

-/**

- * \file arbprogparse.c

- * ARB_*_program parser core

- * \author Karl Rasche

- */

-

-/**

-Notes on program parameters, etc.

-

-The instructions we emit will use six kinds of source registers:

-

-  PROGRAM_INPUT      - input registers

-  PROGRAM_TEMPORARY  - temp registers

-  PROGRAM_ADDRESS    - address/indirect register

-  PROGRAM_SAMPLER    - texture sampler

-  PROGRAM_CONSTANT   - indexes into program->Parameters, a known constant/literal

-  PROGRAM_STATE_VAR  - indexes into program->Parameters, and may actually be:

-                       + a state variable, like "state.fog.color", or

-                       + a pointer to a "program.local[k]" parameter, or

-                       + a pointer to a "program.env[k]" parameter

-

-Basically, all the program.local[] and program.env[] values will get mapped

-into the unified gl_program->Parameters array.  This solves the problem of

-having three separate program parameter arrays.

-*/

-

-

-#include "main/glheader.h"

-#include "main/imports.h"

-#include "main/context.h"

-#include "main/mtypes.h"

-#include "arbprogparse.h"

-#include "programopt.h"

-#include "prog_parameter.h"

-#include "prog_statevars.h"

-#include "prog_instruction.h"

-#include "program_parser.h"

-

-

-void

-_mesa_parse_arb_fragment_program(struct gl_context* ctx, GLenum target,

-                                 const GLvoid *str, GLsizei len,

-                                 struct gl_fragment_program *program)

-{

-   struct gl_program prog;

-   struct asm_parser_state state;

-   GLuint i;

-

-   ASSERT(target == GL_FRAGMENT_PROGRAM_ARB);

-

-   memset(&prog, 0, sizeof(prog));

-   memset(&state, 0, sizeof(state));

-   state.prog = &prog;

-

-   if (!_mesa_parse_arb_program(ctx, target, (const GLubyte*) str, len,

-				&state)) {

-      /* Error in the program. Just return. */

-      return;

-   }

-

-   if (program->Base.String != NULL)

-      free(program->Base.String);

-

-   /* Copy the relevant contents of the arb_program struct into the

-    * fragment_program struct.

-    */

-   program->Base.String          = prog.String;

-   program->Base.NumInstructions = prog.NumInstructions;

-   program->Base.NumTemporaries  = prog.NumTemporaries;

-   program->Base.NumParameters   = prog.NumParameters;

-   program->Base.NumAttributes   = prog.NumAttributes;

-   program->Base.NumAddressRegs  = prog.NumAddressRegs;

-   program->Base.NumNativeInstructions = prog.NumNativeInstructions;

-   program->Base.NumNativeTemporaries = prog.NumNativeTemporaries;

-   program->Base.NumNativeParameters = prog.NumNativeParameters;

-   program->Base.NumNativeAttributes = prog.NumNativeAttributes;

-   program->Base.NumNativeAddressRegs = prog.NumNativeAddressRegs;

-   program->Base.NumAluInstructions   = prog.NumAluInstructions;

-   program->Base.NumTexInstructions   = prog.NumTexInstructions;

-   program->Base.NumTexIndirections   = prog.NumTexIndirections;

-   program->Base.NumNativeAluInstructions = prog.NumAluInstructions;

-   program->Base.NumNativeTexInstructions = prog.NumTexInstructions;

-   program->Base.NumNativeTexIndirections = prog.NumTexIndirections;

-   program->Base.InputsRead      = prog.InputsRead;

-   program->Base.OutputsWritten  = prog.OutputsWritten;

-   program->Base.IndirectRegisterFiles = prog.IndirectRegisterFiles;

-   for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++) {

-      program->Base.TexturesUsed[i] = prog.TexturesUsed[i];

-      if (prog.TexturesUsed[i])

-         program->Base.SamplersUsed |= (1 << i);

-   }

-   program->Base.ShadowSamplers = prog.ShadowSamplers;

-   switch (state.option.Fog) {

-   case OPTION_FOG_EXP:    program->FogOption = GL_EXP;    break;

-   case OPTION_FOG_EXP2:   program->FogOption = GL_EXP2;   break;

-   case OPTION_FOG_LINEAR: program->FogOption = GL_LINEAR; break;

-   default:                program->FogOption = GL_NONE;   break;

-   }

-   program->OriginUpperLeft = state.option.OriginUpperLeft;

-   program->PixelCenterInteger = state.option.PixelCenterInteger;

-

-   program->UsesKill            = state.fragment.UsesKill;

-

-   if (program->FogOption)

-      program->Base.InputsRead |= FRAG_BIT_FOGC;

-

-   if (program->Base.Instructions)

-      free(program->Base.Instructions);

-   program->Base.Instructions = prog.Instructions;

-

-   if (program->Base.Parameters)

-      _mesa_free_parameter_list(program->Base.Parameters);

-   program->Base.Parameters    = prog.Parameters;

-

-   /* Append fog instructions now if the program has "OPTION ARB_fog_exp"

-    * or similar.  We used to leave this up to drivers, but it appears

-    * there's no hardware that wants to do fog in a discrete stage separate

-    * from the fragment shader.

-    */

-   if (program->FogOption != GL_NONE) {

-      _mesa_append_fog_code(ctx, program);

-      program->FogOption = GL_NONE;

-   }

-

-#if DEBUG_FP

-   printf("____________Fragment program %u ________\n", program->Base.Id);

-   _mesa_print_program(&program->Base);

-#endif

-}

-

-

-

-/**

- * Parse the vertex program string.  If success, update the given

- * vertex_program object with the new program.  Else, leave the vertex_program

- * object unchanged.

- */

-void

-_mesa_parse_arb_vertex_program(struct gl_context *ctx, GLenum target,

-			       const GLvoid *str, GLsizei len,

-			       struct gl_vertex_program *program)

-{

-   struct gl_program prog;

-   struct asm_parser_state state;

-

-   ASSERT(target == GL_VERTEX_PROGRAM_ARB);

-

-   memset(&prog, 0, sizeof(prog));

-   memset(&state, 0, sizeof(state));

-   state.prog = &prog;

-

-   if (!_mesa_parse_arb_program(ctx, target, (const GLubyte*) str, len,

-				&state)) {

-      _mesa_error(ctx, GL_INVALID_OPERATION, "glProgramString(bad program)");

-      return;

-   }

-

-   if (program->Base.String != NULL)

-      free(program->Base.String);

-

-   /* Copy the relevant contents of the arb_program struct into the 

-    * vertex_program struct.

-    */

-   program->Base.String          = prog.String;

-   program->Base.NumInstructions = prog.NumInstructions;

-   program->Base.NumTemporaries  = prog.NumTemporaries;

-   program->Base.NumParameters   = prog.NumParameters;

-   program->Base.NumAttributes   = prog.NumAttributes;

-   program->Base.NumAddressRegs  = prog.NumAddressRegs;

-   program->Base.NumNativeInstructions = prog.NumNativeInstructions;

-   program->Base.NumNativeTemporaries = prog.NumNativeTemporaries;

-   program->Base.NumNativeParameters = prog.NumNativeParameters;

-   program->Base.NumNativeAttributes = prog.NumNativeAttributes;

-   program->Base.NumNativeAddressRegs = prog.NumNativeAddressRegs;

-   program->Base.InputsRead     = prog.InputsRead;

-   program->Base.OutputsWritten = prog.OutputsWritten;

-   program->Base.IndirectRegisterFiles = prog.IndirectRegisterFiles;

-   program->IsPositionInvariant = (state.option.PositionInvariant)

-      ? GL_TRUE : GL_FALSE;

-

-   if (program->Base.Instructions)

-      free(program->Base.Instructions);

-   program->Base.Instructions = prog.Instructions;

-

-   if (program->Base.Parameters)

-      _mesa_free_parameter_list(program->Base.Parameters);

-   program->Base.Parameters = prog.Parameters; 

-

-#if DEBUG_VP

-   printf("____________Vertex program %u __________\n", program->Base.Id);

-   _mesa_print_program(&program->Base);

-#endif

-}

+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ *
+ * 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 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
+ * BRIAN PAUL 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.
+ */
+
+#define DEBUG_PARSING 0
+
+/**
+ * \file arbprogparse.c
+ * ARB_*_program parser core
+ * \author Karl Rasche
+ */
+
+/**
+Notes on program parameters, etc.
+
+The instructions we emit will use six kinds of source registers:
+
+  PROGRAM_INPUT      - input registers
+  PROGRAM_TEMPORARY  - temp registers
+  PROGRAM_ADDRESS    - address/indirect register
+  PROGRAM_SAMPLER    - texture sampler
+  PROGRAM_CONSTANT   - indexes into program->Parameters, a known constant/literal
+  PROGRAM_STATE_VAR  - indexes into program->Parameters, and may actually be:
+                       + a state variable, like "state.fog.color", or
+                       + a pointer to a "program.local[k]" parameter, or
+                       + a pointer to a "program.env[k]" parameter
+
+Basically, all the program.local[] and program.env[] values will get mapped
+into the unified gl_program->Parameters array.  This solves the problem of
+having three separate program parameter arrays.
+*/
+
+
+#include "main/glheader.h"
+#include "main/imports.h"
+#include "main/context.h"
+#include "main/mtypes.h"
+#include "arbprogparse.h"
+#include "programopt.h"
+#include "prog_parameter.h"
+#include "prog_statevars.h"
+#include "prog_instruction.h"
+#include "program_parser.h"
+
+
+void
+_mesa_parse_arb_fragment_program(struct gl_context* ctx, GLenum target,
+                                 const GLvoid *str, GLsizei len,
+                                 struct gl_fragment_program *program)
+{
+   struct gl_program prog;
+   struct asm_parser_state state;
+   GLuint i;
+
+   ASSERT(target == GL_FRAGMENT_PROGRAM_ARB);
+
+   memset(&prog, 0, sizeof(prog));
+   memset(&state, 0, sizeof(state));
+   state.prog = &prog;
+
+   if (!_mesa_parse_arb_program(ctx, target, (const GLubyte*) str, len,
+				&state)) {
+      /* Error in the program. Just return. */
+      return;
+   }
+
+   if (program->Base.String != NULL)
+      free(program->Base.String);
+
+   /* Copy the relevant contents of the arb_program struct into the
+    * fragment_program struct.
+    */
+   program->Base.String          = prog.String;
+   program->Base.NumInstructions = prog.NumInstructions;
+   program->Base.NumTemporaries  = prog.NumTemporaries;
+   program->Base.NumParameters   = prog.NumParameters;
+   program->Base.NumAttributes   = prog.NumAttributes;
+   program->Base.NumAddressRegs  = prog.NumAddressRegs;
+   program->Base.NumNativeInstructions = prog.NumNativeInstructions;
+   program->Base.NumNativeTemporaries = prog.NumNativeTemporaries;
+   program->Base.NumNativeParameters = prog.NumNativeParameters;
+   program->Base.NumNativeAttributes = prog.NumNativeAttributes;
+   program->Base.NumNativeAddressRegs = prog.NumNativeAddressRegs;
+   program->Base.NumAluInstructions   = prog.NumAluInstructions;
+   program->Base.NumTexInstructions   = prog.NumTexInstructions;
+   program->Base.NumTexIndirections   = prog.NumTexIndirections;
+   program->Base.NumNativeAluInstructions = prog.NumAluInstructions;
+   program->Base.NumNativeTexInstructions = prog.NumTexInstructions;
+   program->Base.NumNativeTexIndirections = prog.NumTexIndirections;
+   program->Base.InputsRead      = prog.InputsRead;
+   program->Base.OutputsWritten  = prog.OutputsWritten;
+   program->Base.IndirectRegisterFiles = prog.IndirectRegisterFiles;
+   for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++) {
+      program->Base.TexturesUsed[i] = prog.TexturesUsed[i];
+      if (prog.TexturesUsed[i])
+         program->Base.SamplersUsed |= (1 << i);
+   }
+   program->Base.ShadowSamplers = prog.ShadowSamplers;
+   switch (state.option.Fog) {
+   case OPTION_FOG_EXP:    program->FogOption = GL_EXP;    break;
+   case OPTION_FOG_EXP2:   program->FogOption = GL_EXP2;   break;
+   case OPTION_FOG_LINEAR: program->FogOption = GL_LINEAR; break;
+   default:                program->FogOption = GL_NONE;   break;
+   }
+   program->OriginUpperLeft = state.option.OriginUpperLeft;
+   program->PixelCenterInteger = state.option.PixelCenterInteger;
+
+   program->UsesKill            = state.fragment.UsesKill;
+
+   if (program->FogOption)
+      program->Base.InputsRead |= FRAG_BIT_FOGC;
+
+   if (program->Base.Instructions)
+      free(program->Base.Instructions);
+   program->Base.Instructions = prog.Instructions;
+
+   if (program->Base.Parameters)
+      _mesa_free_parameter_list(program->Base.Parameters);
+   program->Base.Parameters    = prog.Parameters;
+
+   /* Append fog instructions now if the program has "OPTION ARB_fog_exp"
+    * or similar.  We used to leave this up to drivers, but it appears
+    * there's no hardware that wants to do fog in a discrete stage separate
+    * from the fragment shader.
+    */
+   if (program->FogOption != GL_NONE) {
+      /* XXX: we should somehow recompile this to remove clamping if disabled
+       * On the ATI driver, this is unclampled if fragment clamping is disabled
+       */
+      _mesa_append_fog_code(ctx, program, GL_TRUE);
+      program->FogOption = GL_NONE;
+   }
+
+#if DEBUG_FP
+   printf("____________Fragment program %u ________\n", program->Base.Id);
+   _mesa_print_program(&program->Base);
+#endif
+}
+
+
+
+/**
+ * Parse the vertex program string.  If success, update the given
+ * vertex_program object with the new program.  Else, leave the vertex_program
+ * object unchanged.
+ */
+void
+_mesa_parse_arb_vertex_program(struct gl_context *ctx, GLenum target,
+			       const GLvoid *str, GLsizei len,
+			       struct gl_vertex_program *program)
+{
+   struct gl_program prog;
+   struct asm_parser_state state;
+
+   ASSERT(target == GL_VERTEX_PROGRAM_ARB);
+
+   memset(&prog, 0, sizeof(prog));
+   memset(&state, 0, sizeof(state));
+   state.prog = &prog;
+
+   if (!_mesa_parse_arb_program(ctx, target, (const GLubyte*) str, len,
+				&state)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glProgramString(bad program)");
+      return;
+   }
+
+   if (program->Base.String != NULL)
+      free(program->Base.String);
+
+   /* Copy the relevant contents of the arb_program struct into the 
+    * vertex_program struct.
+    */
+   program->Base.String          = prog.String;
+   program->Base.NumInstructions = prog.NumInstructions;
+   program->Base.NumTemporaries  = prog.NumTemporaries;
+   program->Base.NumParameters   = prog.NumParameters;
+   program->Base.NumAttributes   = prog.NumAttributes;
+   program->Base.NumAddressRegs  = prog.NumAddressRegs;
+   program->Base.NumNativeInstructions = prog.NumNativeInstructions;
+   program->Base.NumNativeTemporaries = prog.NumNativeTemporaries;
+   program->Base.NumNativeParameters = prog.NumNativeParameters;
+   program->Base.NumNativeAttributes = prog.NumNativeAttributes;
+   program->Base.NumNativeAddressRegs = prog.NumNativeAddressRegs;
+   program->Base.InputsRead     = prog.InputsRead;
+   program->Base.OutputsWritten = prog.OutputsWritten;
+   program->Base.IndirectRegisterFiles = prog.IndirectRegisterFiles;
+   program->IsPositionInvariant = (state.option.PositionInvariant)
+      ? GL_TRUE : GL_FALSE;
+
+   if (program->Base.Instructions)
+      free(program->Base.Instructions);
+   program->Base.Instructions = prog.Instructions;
+
+   if (program->Base.Parameters)
+      _mesa_free_parameter_list(program->Base.Parameters);
+   program->Base.Parameters = prog.Parameters; 
+
+#if DEBUG_VP
+   printf("____________Vertex program %u __________\n", program->Base.Id);
+   _mesa_print_program(&program->Base);
+#endif
+}
diff --git a/mesalib/src/mesa/program/ir_to_mesa.cpp b/mesalib/src/mesa/program/ir_to_mesa.cpp
index c1b28ec3f..bf2513d47 100644
--- a/mesalib/src/mesa/program/ir_to_mesa.cpp
+++ b/mesalib/src/mesa/program/ir_to_mesa.cpp
@@ -1,3332 +1,3309 @@
-/*

- * Copyright (C) 2005-2007  Brian Paul   All Rights Reserved.

- * Copyright (C) 2008  VMware, Inc.   All Rights Reserved.

- * Copyright © 2010 Intel Corporation

- *

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

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

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

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

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

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

- *

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

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

- * Software.

- *

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

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

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

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

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

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

- * DEALINGS IN THE SOFTWARE.

- */

-

-/**

- * \file ir_to_mesa.cpp

- *

- * Translate GLSL IR to Mesa's gl_program representation.

- */

-

-#include <stdio.h>

-#include "main/compiler.h"

-#include "ir.h"

-#include "ir_visitor.h"

-#include "ir_print_visitor.h"

-#include "ir_expression_flattening.h"

-#include "glsl_types.h"

-#include "glsl_parser_extras.h"

-#include "../glsl/program.h"

-#include "ir_optimization.h"

-#include "ast.h"

-

-extern "C" {

-#include "main/mtypes.h"

-#include "main/shaderapi.h"

-#include "main/shaderobj.h"

-#include "main/uniforms.h"

-#include "program/hash_table.h"

-#include "program/prog_instruction.h"

-#include "program/prog_optimize.h"

-#include "program/prog_print.h"

-#include "program/program.h"

-#include "program/prog_uniform.h"

-#include "program/prog_parameter.h"

-#include "program/sampler.h"

-}

-

-static int swizzle_for_size(int size);

-

-/**

- * This struct is a corresponding struct to Mesa prog_src_register, with

- * wider fields.

- */

-typedef struct ir_to_mesa_src_reg {

-   ir_to_mesa_src_reg(int file, int index, const glsl_type *type)

-   {

-      this->file = (gl_register_file) file;

-      this->index = index;

-      if (type && (type->is_scalar() || type->is_vector() || type->is_matrix()))

-	 this->swizzle = swizzle_for_size(type->vector_elements);

-      else

-	 this->swizzle = SWIZZLE_XYZW;

-      this->negate = 0;

-      this->reladdr = NULL;

-   }

-

-   ir_to_mesa_src_reg()

-   {

-      this->file = PROGRAM_UNDEFINED;

-      this->index = 0;

-      this->swizzle = 0;

-      this->negate = 0;

-      this->reladdr = NULL;

-   }

-

-   gl_register_file file; /**< PROGRAM_* from Mesa */

-   int index; /**< temporary index, VERT_ATTRIB_*, FRAG_ATTRIB_*, etc. */

-   GLuint swizzle; /**< SWIZZLE_XYZWONEZERO swizzles from Mesa. */

-   int negate; /**< NEGATE_XYZW mask from mesa */

-   /** Register index should be offset by the integer in this reg. */

-   ir_to_mesa_src_reg *reladdr;

-} ir_to_mesa_src_reg;

-

-typedef struct ir_to_mesa_dst_reg {

-   int file; /**< PROGRAM_* from Mesa */

-   int index; /**< temporary index, VERT_ATTRIB_*, FRAG_ATTRIB_*, etc. */

-   int writemask; /**< Bitfield of WRITEMASK_[XYZW] */

-   GLuint cond_mask:4;

-   /** Register index should be offset by the integer in this reg. */

-   ir_to_mesa_src_reg *reladdr;

-} ir_to_mesa_dst_reg;

-

-extern ir_to_mesa_src_reg ir_to_mesa_undef;

-

-class ir_to_mesa_instruction : public exec_node {

-public:

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

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

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

-   {

-      void *node;

-

-      node = rzalloc_size(ctx, size);

-      assert(node != NULL);

-

-      return node;

-   }

-

-   enum prog_opcode op;

-   ir_to_mesa_dst_reg dst_reg;

-   ir_to_mesa_src_reg src_reg[3];

-   /** Pointer to the ir source this tree came from for debugging */

-   ir_instruction *ir;

-   GLboolean cond_update;

-   bool saturate;

-   int sampler; /**< sampler index */

-   int tex_target; /**< One of TEXTURE_*_INDEX */

-   GLboolean tex_shadow;

-

-   class function_entry *function; /* Set on OPCODE_CAL or OPCODE_BGNSUB */

-};

-

-class variable_storage : public exec_node {

-public:

-   variable_storage(ir_variable *var, gl_register_file file, int index)

-      : file(file), index(index), var(var)

-   {

-      /* empty */

-   }

-

-   gl_register_file file;

-   int index;

-   ir_variable *var; /* variable that maps to this, if any */

-};

-

-class function_entry : public exec_node {

-public:

-   ir_function_signature *sig;

-

-   /**

-    * identifier of this function signature used by the program.

-    *

-    * At the point that Mesa instructions for function calls are

-    * generated, we don't know the address of the first instruction of

-    * the function body.  So we make the BranchTarget that is called a

-    * small integer and rewrite them during set_branchtargets().

-    */

-   int sig_id;

-

-   /**

-    * Pointer to first instruction of the function body.

-    *

-    * Set during function body emits after main() is processed.

-    */

-   ir_to_mesa_instruction *bgn_inst;

-

-   /**

-    * Index of the first instruction of the function body in actual

-    * Mesa IR.

-    *

-    * Set after convertion from ir_to_mesa_instruction to prog_instruction.

-    */

-   int inst;

-

-   /** Storage for the return value. */

-   ir_to_mesa_src_reg return_reg;

-};

-

-class ir_to_mesa_visitor : public ir_visitor {

-public:

-   ir_to_mesa_visitor();

-   ~ir_to_mesa_visitor();

-

-   function_entry *current_function;

-

-   struct gl_context *ctx;

-   struct gl_program *prog;

-   struct gl_shader_program *shader_program;

-   struct gl_shader_compiler_options *options;

-

-   int next_temp;

-

-   variable_storage *find_variable_storage(ir_variable *var);

-

-   function_entry *get_function_signature(ir_function_signature *sig);

-

-   ir_to_mesa_src_reg get_temp(const glsl_type *type);

-   void reladdr_to_temp(ir_instruction *ir,

-			ir_to_mesa_src_reg *reg, int *num_reladdr);

-

-   struct ir_to_mesa_src_reg src_reg_for_float(float val);

-

-   /**

-    * \name Visit methods

-    *

-    * As typical for the visitor pattern, there must be one \c visit method for

-    * each concrete subclass of \c ir_instruction.  Virtual base classes within

-    * the hierarchy should not have \c visit methods.

-    */

-   /*@{*/

-   virtual void visit(ir_variable *);

-   virtual void visit(ir_loop *);

-   virtual void visit(ir_loop_jump *);

-   virtual void visit(ir_function_signature *);

-   virtual void visit(ir_function *);

-   virtual void visit(ir_expression *);

-   virtual void visit(ir_swizzle *);

-   virtual void visit(ir_dereference_variable  *);

-   virtual void visit(ir_dereference_array *);

-   virtual void visit(ir_dereference_record *);

-   virtual void visit(ir_assignment *);

-   virtual void visit(ir_constant *);

-   virtual void visit(ir_call *);

-   virtual void visit(ir_return *);

-   virtual void visit(ir_discard *);

-   virtual void visit(ir_texture *);

-   virtual void visit(ir_if *);

-   /*@}*/

-

-   struct ir_to_mesa_src_reg result;

-

-   /** List of variable_storage */

-   exec_list variables;

-

-   /** List of function_entry */

-   exec_list function_signatures;

-   int next_signature_id;

-

-   /** List of ir_to_mesa_instruction */

-   exec_list instructions;

-

-   ir_to_mesa_instruction *ir_to_mesa_emit_op0(ir_instruction *ir,

-					       enum prog_opcode op);

-

-   ir_to_mesa_instruction *ir_to_mesa_emit_op1(ir_instruction *ir,

-					       enum prog_opcode op,

-					       ir_to_mesa_dst_reg dst,

-					       ir_to_mesa_src_reg src0);

-

-   ir_to_mesa_instruction *ir_to_mesa_emit_op2(ir_instruction *ir,

-					       enum prog_opcode op,

-					       ir_to_mesa_dst_reg dst,

-					       ir_to_mesa_src_reg src0,

-					       ir_to_mesa_src_reg src1);

-

-   ir_to_mesa_instruction *ir_to_mesa_emit_op3(ir_instruction *ir,

-					       enum prog_opcode op,

-					       ir_to_mesa_dst_reg dst,

-					       ir_to_mesa_src_reg src0,

-					       ir_to_mesa_src_reg src1,

-					       ir_to_mesa_src_reg src2);

-

-   /**

-    * Emit the correct dot-product instruction for the type of arguments

-    *

-    * \sa ir_to_mesa_emit_op2

-    */

-   void ir_to_mesa_emit_dp(ir_instruction *ir,

-			   ir_to_mesa_dst_reg dst,

-			   ir_to_mesa_src_reg src0,

-			   ir_to_mesa_src_reg src1,

-			   unsigned elements);

-

-   void ir_to_mesa_emit_scalar_op1(ir_instruction *ir,

-				   enum prog_opcode op,

-				   ir_to_mesa_dst_reg dst,

-				   ir_to_mesa_src_reg src0);

-

-   void ir_to_mesa_emit_scalar_op2(ir_instruction *ir,

-				   enum prog_opcode op,

-				   ir_to_mesa_dst_reg dst,

-				   ir_to_mesa_src_reg src0,

-				   ir_to_mesa_src_reg src1);

-

-   void emit_scs(ir_instruction *ir, enum prog_opcode op,

-		 ir_to_mesa_dst_reg dst,

-		 const ir_to_mesa_src_reg &src);

-

-   GLboolean try_emit_mad(ir_expression *ir,

-			  int mul_operand);

-   GLboolean try_emit_sat(ir_expression *ir);

-

-   void emit_swz(ir_expression *ir);

-

-   bool process_move_condition(ir_rvalue *ir);

-

-   void copy_propagate(void);

-

-   void *mem_ctx;

-};

-

-ir_to_mesa_src_reg ir_to_mesa_undef = ir_to_mesa_src_reg(PROGRAM_UNDEFINED, 0, NULL);

-

-ir_to_mesa_dst_reg ir_to_mesa_undef_dst = {

-   PROGRAM_UNDEFINED, 0, SWIZZLE_NOOP, COND_TR, NULL,

-};

-

-ir_to_mesa_dst_reg ir_to_mesa_address_reg = {

-   PROGRAM_ADDRESS, 0, WRITEMASK_X, COND_TR, NULL

-};

-

-static void

-fail_link(struct gl_shader_program *prog, const char *fmt, ...) PRINTFLIKE(2, 3);

-

-static void

-fail_link(struct gl_shader_program *prog, const char *fmt, ...)

-{

-   va_list args;

-   va_start(args, fmt);

-   ralloc_vasprintf_append(&prog->InfoLog, fmt, args);

-   va_end(args);

-

-   prog->LinkStatus = GL_FALSE;

-}

-

-static int

-swizzle_for_size(int size)

-{

-   int size_swizzles[4] = {

-      MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X, SWIZZLE_X, SWIZZLE_X),

-      MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Y, SWIZZLE_Y),

-      MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z),

-      MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_W),

-   };

-

-   assert((size >= 1) && (size <= 4));

-   return size_swizzles[size - 1];

-}

-

-ir_to_mesa_instruction *

-ir_to_mesa_visitor::ir_to_mesa_emit_op3(ir_instruction *ir,

-					enum prog_opcode op,

-					ir_to_mesa_dst_reg dst,

-					ir_to_mesa_src_reg src0,

-					ir_to_mesa_src_reg src1,

-					ir_to_mesa_src_reg src2)

-{

-   ir_to_mesa_instruction *inst = new(mem_ctx) ir_to_mesa_instruction();

-   int num_reladdr = 0;

-

-   /* If we have to do relative addressing, we want to load the ARL

-    * reg directly for one of the regs, and preload the other reladdr

-    * sources into temps.

-    */

-   num_reladdr += dst.reladdr != NULL;

-   num_reladdr += src0.reladdr != NULL;

-   num_reladdr += src1.reladdr != NULL;

-   num_reladdr += src2.reladdr != NULL;

-

-   reladdr_to_temp(ir, &src2, &num_reladdr);

-   reladdr_to_temp(ir, &src1, &num_reladdr);

-   reladdr_to_temp(ir, &src0, &num_reladdr);

-

-   if (dst.reladdr) {

-      ir_to_mesa_emit_op1(ir, OPCODE_ARL, ir_to_mesa_address_reg,

-                          *dst.reladdr);

-

-      num_reladdr--;

-   }

-   assert(num_reladdr == 0);

-

-   inst->op = op;

-   inst->dst_reg = dst;

-   inst->src_reg[0] = src0;

-   inst->src_reg[1] = src1;

-   inst->src_reg[2] = src2;

-   inst->ir = ir;

-

-   inst->function = NULL;

-

-   this->instructions.push_tail(inst);

-

-   return inst;

-}

-

-

-ir_to_mesa_instruction *

-ir_to_mesa_visitor::ir_to_mesa_emit_op2(ir_instruction *ir,

-					enum prog_opcode op,

-					ir_to_mesa_dst_reg dst,

-					ir_to_mesa_src_reg src0,

-					ir_to_mesa_src_reg src1)

-{

-   return ir_to_mesa_emit_op3(ir, op, dst, src0, src1, ir_to_mesa_undef);

-}

-

-ir_to_mesa_instruction *

-ir_to_mesa_visitor::ir_to_mesa_emit_op1(ir_instruction *ir,

-					enum prog_opcode op,

-					ir_to_mesa_dst_reg dst,

-					ir_to_mesa_src_reg src0)

-{

-   assert(dst.writemask != 0);

-   return ir_to_mesa_emit_op3(ir, op, dst,

-			      src0, ir_to_mesa_undef, ir_to_mesa_undef);

-}

-

-ir_to_mesa_instruction *

-ir_to_mesa_visitor::ir_to_mesa_emit_op0(ir_instruction *ir,

-					enum prog_opcode op)

-{

-   return ir_to_mesa_emit_op3(ir, op, ir_to_mesa_undef_dst,

-			      ir_to_mesa_undef,

-			      ir_to_mesa_undef,

-			      ir_to_mesa_undef);

-}

-

-void

-ir_to_mesa_visitor::ir_to_mesa_emit_dp(ir_instruction *ir,

-				       ir_to_mesa_dst_reg dst,

-				       ir_to_mesa_src_reg src0,

-				       ir_to_mesa_src_reg src1,

-				       unsigned elements)

-{

-   static const gl_inst_opcode dot_opcodes[] = {

-      OPCODE_DP2, OPCODE_DP3, OPCODE_DP4

-   };

-

-   ir_to_mesa_emit_op3(ir, dot_opcodes[elements - 2],

-		       dst, src0, src1, ir_to_mesa_undef);

-}

-

-inline ir_to_mesa_dst_reg

-ir_to_mesa_dst_reg_from_src(ir_to_mesa_src_reg reg)

-{

-   ir_to_mesa_dst_reg dst_reg;

-

-   dst_reg.file = reg.file;

-   dst_reg.index = reg.index;

-   dst_reg.writemask = WRITEMASK_XYZW;

-   dst_reg.cond_mask = COND_TR;

-   dst_reg.reladdr = reg.reladdr;

-

-   return dst_reg;

-}

-

-inline ir_to_mesa_src_reg

-ir_to_mesa_src_reg_from_dst(ir_to_mesa_dst_reg reg)

-{

-   return ir_to_mesa_src_reg(reg.file, reg.index, NULL);

-}

-

-/**

- * Emits Mesa scalar opcodes to produce unique answers across channels.

- *

- * Some Mesa opcodes are scalar-only, like ARB_fp/vp.  The src X

- * channel determines the result across all channels.  So to do a vec4

- * of this operation, we want to emit a scalar per source channel used

- * to produce dest channels.

- */

-void

-ir_to_mesa_visitor::ir_to_mesa_emit_scalar_op2(ir_instruction *ir,

-					       enum prog_opcode op,

-					       ir_to_mesa_dst_reg dst,

-					       ir_to_mesa_src_reg orig_src0,

-					       ir_to_mesa_src_reg orig_src1)

-{

-   int i, j;

-   int done_mask = ~dst.writemask;

-

-   /* Mesa RCP is a scalar operation splatting results to all channels,

-    * like ARB_fp/vp.  So emit as many RCPs as necessary to cover our

-    * dst channels.

-    */

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

-      GLuint this_mask = (1 << i);

-      ir_to_mesa_instruction *inst;

-      ir_to_mesa_src_reg src0 = orig_src0;

-      ir_to_mesa_src_reg src1 = orig_src1;

-

-      if (done_mask & this_mask)

-	 continue;

-

-      GLuint src0_swiz = GET_SWZ(src0.swizzle, i);

-      GLuint src1_swiz = GET_SWZ(src1.swizzle, i);

-      for (j = i + 1; j < 4; j++) {

-	 /* If there is another enabled component in the destination that is

-	  * derived from the same inputs, generate its value on this pass as

-	  * well.

-	  */

-	 if (!(done_mask & (1 << j)) &&

-	     GET_SWZ(src0.swizzle, j) == src0_swiz &&

-	     GET_SWZ(src1.swizzle, j) == src1_swiz) {

-	    this_mask |= (1 << j);

-	 }

-      }

-      src0.swizzle = MAKE_SWIZZLE4(src0_swiz, src0_swiz,

-				   src0_swiz, src0_swiz);

-      src1.swizzle = MAKE_SWIZZLE4(src1_swiz, src1_swiz,

-				  src1_swiz, src1_swiz);

-

-      inst = ir_to_mesa_emit_op2(ir, op,

-				 dst,

-				 src0,

-				 src1);

-      inst->dst_reg.writemask = this_mask;

-      done_mask |= this_mask;

-   }

-}

-

-void

-ir_to_mesa_visitor::ir_to_mesa_emit_scalar_op1(ir_instruction *ir,

-					       enum prog_opcode op,

-					       ir_to_mesa_dst_reg dst,

-					       ir_to_mesa_src_reg src0)

-{

-   ir_to_mesa_src_reg undef = ir_to_mesa_undef;

-

-   undef.swizzle = SWIZZLE_XXXX;

-

-   ir_to_mesa_emit_scalar_op2(ir, op, dst, src0, undef);

-}

-

-/**

- * Emit an OPCODE_SCS instruction

- *

- * The \c SCS opcode functions a bit differently than the other Mesa (or

- * ARB_fragment_program) opcodes.  Instead of splatting its result across all

- * four components of the destination, it writes one value to the \c x

- * component and another value to the \c y component.

- *

- * \param ir        IR instruction being processed

- * \param op        Either \c OPCODE_SIN or \c OPCODE_COS depending on which

- *                  value is desired.

- * \param dst       Destination register

- * \param src       Source register

- */

-void

-ir_to_mesa_visitor::emit_scs(ir_instruction *ir, enum prog_opcode op,

-			     ir_to_mesa_dst_reg dst,

-			     const ir_to_mesa_src_reg &src)

-{

-   /* Vertex programs cannot use the SCS opcode.

-    */

-   if (this->prog->Target == GL_VERTEX_PROGRAM_ARB) {

-      ir_to_mesa_emit_scalar_op1(ir, op, dst, src);

-      return;

-   }

-

-   const unsigned component = (op == OPCODE_SIN) ? 0 : 1;

-   const unsigned scs_mask = (1U << component);

-   int done_mask = ~dst.writemask;

-   ir_to_mesa_src_reg tmp;

-

-   assert(op == OPCODE_SIN || op == OPCODE_COS);

-

-   /* If there are compnents in the destination that differ from the component

-    * that will be written by the SCS instrution, we'll need a temporary.

-    */

-   if (scs_mask != unsigned(dst.writemask)) {

-      tmp = get_temp(glsl_type::vec4_type);

-   }

-

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

-      unsigned this_mask = (1U << i);

-      ir_to_mesa_src_reg src0 = src;

-

-      if ((done_mask & this_mask) != 0)

-	 continue;

-

-      /* The source swizzle specified which component of the source generates

-       * sine / cosine for the current component in the destination.  The SCS

-       * instruction requires that this value be swizzle to the X component.

-       * Replace the current swizzle with a swizzle that puts the source in

-       * the X component.

-       */

-      unsigned src0_swiz = GET_SWZ(src.swizzle, i);

-

-      src0.swizzle = MAKE_SWIZZLE4(src0_swiz, src0_swiz,

-				   src0_swiz, src0_swiz);

-      for (unsigned j = i + 1; j < 4; j++) {

-	 /* If there is another enabled component in the destination that is

-	  * derived from the same inputs, generate its value on this pass as

-	  * well.

-	  */

-	 if (!(done_mask & (1 << j)) &&

-	     GET_SWZ(src0.swizzle, j) == src0_swiz) {

-	    this_mask |= (1 << j);

-	 }

-      }

-

-      if (this_mask != scs_mask) {

-	 ir_to_mesa_instruction *inst;

-	 ir_to_mesa_dst_reg tmp_dst = ir_to_mesa_dst_reg_from_src(tmp);

-

-	 /* Emit the SCS instruction.

-	  */

-	 inst = ir_to_mesa_emit_op1(ir, OPCODE_SCS, tmp_dst, src0);

-	 inst->dst_reg.writemask = scs_mask;

-

-	 /* Move the result of the SCS instruction to the desired location in

-	  * the destination.

-	  */

-	 tmp.swizzle = MAKE_SWIZZLE4(component, component,

-				     component, component);

-	 inst = ir_to_mesa_emit_op1(ir, OPCODE_SCS, dst, tmp);

-	 inst->dst_reg.writemask = this_mask;

-      } else {

-	 /* Emit the SCS instruction to write directly to the destination.

-	  */

-	 ir_to_mesa_instruction *inst =

-	    ir_to_mesa_emit_op1(ir, OPCODE_SCS, dst, src0);

-	 inst->dst_reg.writemask = scs_mask;

-      }

-

-      done_mask |= this_mask;

-   }

-}

-

-struct ir_to_mesa_src_reg

-ir_to_mesa_visitor::src_reg_for_float(float val)

-{

-   ir_to_mesa_src_reg src_reg(PROGRAM_CONSTANT, -1, NULL);

-

-   src_reg.index = _mesa_add_unnamed_constant(this->prog->Parameters,

-					      &val, 1, &src_reg.swizzle);

-

-   return src_reg;

-}

-

-static int

-type_size(const struct glsl_type *type)

-{

-   unsigned int i;

-   int size;

-

-   switch (type->base_type) {

-   case GLSL_TYPE_UINT:

-   case GLSL_TYPE_INT:

-   case GLSL_TYPE_FLOAT:

-   case GLSL_TYPE_BOOL:

-      if (type->is_matrix()) {

-	 return type->matrix_columns;

-      } else {

-	 /* Regardless of size of vector, it gets a vec4. This is bad

-	  * packing for things like floats, but otherwise arrays become a

-	  * mess.  Hopefully a later pass over the code can pack scalars

-	  * down if appropriate.

-	  */

-	 return 1;

-      }

-   case GLSL_TYPE_ARRAY:

-      assert(type->length > 0);

-      return type_size(type->fields.array) * type->length;

-   case GLSL_TYPE_STRUCT:

-      size = 0;

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

-	 size += type_size(type->fields.structure[i].type);

-      }

-      return size;

-   case GLSL_TYPE_SAMPLER:

-      /* Samplers take up one slot in UNIFORMS[], but they're baked in

-       * at link time.

-       */

-      return 1;

-   default:

-      assert(0);

-      return 0;

-   }

-}

-

-/**

- * In the initial pass of codegen, we assign temporary numbers to

- * intermediate results.  (not SSA -- variable assignments will reuse

- * storage).  Actual register allocation for the Mesa VM occurs in a

- * pass over the Mesa IR later.

- */

-ir_to_mesa_src_reg

-ir_to_mesa_visitor::get_temp(const glsl_type *type)

-{

-   ir_to_mesa_src_reg src_reg;

-   int swizzle[4];

-   int i;

-

-   src_reg.file = PROGRAM_TEMPORARY;

-   src_reg.index = next_temp;

-   src_reg.reladdr = NULL;

-   next_temp += type_size(type);

-

-   if (type->is_array() || type->is_record()) {

-      src_reg.swizzle = SWIZZLE_NOOP;

-   } else {

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

-	 swizzle[i] = i;

-      for (; i < 4; i++)

-	 swizzle[i] = type->vector_elements - 1;

-      src_reg.swizzle = MAKE_SWIZZLE4(swizzle[0], swizzle[1],

-				      swizzle[2], swizzle[3]);

-   }

-   src_reg.negate = 0;

-

-   return src_reg;

-}

-

-variable_storage *

-ir_to_mesa_visitor::find_variable_storage(ir_variable *var)

-{

-   

-   variable_storage *entry;

-

-   foreach_iter(exec_list_iterator, iter, this->variables) {

-      entry = (variable_storage *)iter.get();

-

-      if (entry->var == var)

-	 return entry;

-   }

-

-   return NULL;

-}

-

-void

-ir_to_mesa_visitor::visit(ir_variable *ir)

-{

-   if (strcmp(ir->name, "gl_FragCoord") == 0) {

-      struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog;

-

-      fp->OriginUpperLeft = ir->origin_upper_left;

-      fp->PixelCenterInteger = ir->pixel_center_integer;

-

-   } else if (strcmp(ir->name, "gl_FragDepth") == 0) {

-      struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog;

-      switch (ir->depth_layout) {

-      case ir_depth_layout_none:

-	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_NONE;

-	 break;

-      case ir_depth_layout_any:

-	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_ANY;

-	 break;

-      case ir_depth_layout_greater:

-	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_GREATER;

-	 break;

-      case ir_depth_layout_less:

-	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_LESS;

-	 break;

-      case ir_depth_layout_unchanged:

-	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_UNCHANGED;

-	 break;

-      default:

-	 assert(0);

-	 break;

-      }

-   }

-

-   if (ir->mode == ir_var_uniform && strncmp(ir->name, "gl_", 3) == 0) {

-      unsigned int i;

-      const struct gl_builtin_uniform_desc *statevar;

-

-      for (i = 0; _mesa_builtin_uniform_desc[i].name; i++) {

-	 if (strcmp(ir->name, _mesa_builtin_uniform_desc[i].name) == 0)

-	    break;

-      }

-

-      if (!_mesa_builtin_uniform_desc[i].name) {

-	 fail_link(this->shader_program,

-		   "Failed to find builtin uniform `%s'\n", ir->name);

-	 return;

-      }

-

-      statevar = &_mesa_builtin_uniform_desc[i];

-

-      int array_count;

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

-	 array_count = ir->type->length;

-      } else {

-	 array_count = 1;

-      }

-

-      /* Check if this statevar's setup in the STATE file exactly

-       * matches how we'll want to reference it as a

-       * struct/array/whatever.  If not, then we need to move it into

-       * temporary storage and hope that it'll get copy-propagated

-       * out.

-       */

-      for (i = 0; i < statevar->num_elements; i++) {

-	 if (statevar->elements[i].swizzle != SWIZZLE_XYZW) {

-	    break;

-	 }

-      }

-

-      struct variable_storage *storage;

-      ir_to_mesa_dst_reg dst;

-      if (i == statevar->num_elements) {

-	 /* We'll set the index later. */

-	 storage = new(mem_ctx) variable_storage(ir, PROGRAM_STATE_VAR, -1);

-	 this->variables.push_tail(storage);

-

-	 dst = ir_to_mesa_undef_dst;

-      } else {

-	 storage = new(mem_ctx) variable_storage(ir, PROGRAM_TEMPORARY,

-						 this->next_temp);

-	 this->variables.push_tail(storage);

-	 this->next_temp += type_size(ir->type);

-

-	 dst = ir_to_mesa_dst_reg_from_src(ir_to_mesa_src_reg(PROGRAM_TEMPORARY,

-							      storage->index,

-							      NULL));

-      }

-

-

-      for (int a = 0; a < array_count; a++) {

-	 for (unsigned int i = 0; i < statevar->num_elements; i++) {

-	    struct gl_builtin_uniform_element *element = &statevar->elements[i];

-	    int tokens[STATE_LENGTH];

-

-	    memcpy(tokens, element->tokens, sizeof(element->tokens));

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

-	       tokens[1] = a;

-	    }

-

-	    int index = _mesa_add_state_reference(this->prog->Parameters,

-						  (gl_state_index *)tokens);

-

-	    if (storage->file == PROGRAM_STATE_VAR) {

-	       if (storage->index == -1) {

-		  storage->index = index;

-	       } else {

-		  assert(index ==

-                         (int)(storage->index + a * statevar->num_elements + i));

-	       }

-	    } else {

-	       ir_to_mesa_src_reg src(PROGRAM_STATE_VAR, index, NULL);

-	       src.swizzle = element->swizzle;

-	       ir_to_mesa_emit_op1(ir, OPCODE_MOV, dst, src);

-	       /* even a float takes up a whole vec4 reg in a struct/array. */

-	       dst.index++;

-	    }

-	 }

-      }

-      if (storage->file == PROGRAM_TEMPORARY &&

-	  dst.index != storage->index + type_size(ir->type)) {

-	 fail_link(this->shader_program,

-		   "failed to load builtin uniform `%s'  (%d/%d regs loaded)\n",

-		   ir->name, dst.index - storage->index,

-		   type_size(ir->type));

-      }

-   }

-}

-

-void

-ir_to_mesa_visitor::visit(ir_loop *ir)

-{

-   ir_dereference_variable *counter = NULL;

-

-   if (ir->counter != NULL)

-      counter = new(ir) ir_dereference_variable(ir->counter);

-

-   if (ir->from != NULL) {

-      assert(ir->counter != NULL);

-

-      ir_assignment *a = new(ir) ir_assignment(counter, ir->from, NULL);

-

-      a->accept(this);

-      delete a;

-   }

-

-   ir_to_mesa_emit_op0(NULL, OPCODE_BGNLOOP);

-

-   if (ir->to) {

-      ir_expression *e =

-	 new(ir) ir_expression(ir->cmp, glsl_type::bool_type,

-			       counter, ir->to);

-      ir_if *if_stmt =  new(ir) ir_if(e);

-

-      ir_loop_jump *brk = new(ir) ir_loop_jump(ir_loop_jump::jump_break);

-

-      if_stmt->then_instructions.push_tail(brk);

-

-      if_stmt->accept(this);

-

-      delete if_stmt;

-      delete e;

-      delete brk;

-   }

-

-   visit_exec_list(&ir->body_instructions, this);

-

-   if (ir->increment) {

-      ir_expression *e =

-	 new(ir) ir_expression(ir_binop_add, counter->type,

-			       counter, ir->increment);

-

-      ir_assignment *a = new(ir) ir_assignment(counter, e, NULL);

-

-      a->accept(this);

-      delete a;

-      delete e;

-   }

-

-   ir_to_mesa_emit_op0(NULL, OPCODE_ENDLOOP);

-}

-

-void

-ir_to_mesa_visitor::visit(ir_loop_jump *ir)

-{

-   switch (ir->mode) {

-   case ir_loop_jump::jump_break:

-      ir_to_mesa_emit_op0(NULL, OPCODE_BRK);

-      break;

-   case ir_loop_jump::jump_continue:

-      ir_to_mesa_emit_op0(NULL, OPCODE_CONT);

-      break;

-   }

-}

-

-

-void

-ir_to_mesa_visitor::visit(ir_function_signature *ir)

-{

-   assert(0);

-   (void)ir;

-}

-

-void

-ir_to_mesa_visitor::visit(ir_function *ir)

-{

-   /* Ignore function bodies other than main() -- we shouldn't see calls to

-    * them since they should all be inlined before we get to ir_to_mesa.

-    */

-   if (strcmp(ir->name, "main") == 0) {

-      const ir_function_signature *sig;

-      exec_list empty;

-

-      sig = ir->matching_signature(&empty);

-

-      assert(sig);

-

-      foreach_iter(exec_list_iterator, iter, sig->body) {

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

-

-	 ir->accept(this);

-      }

-   }

-}

-

-GLboolean

-ir_to_mesa_visitor::try_emit_mad(ir_expression *ir, int mul_operand)

-{

-   int nonmul_operand = 1 - mul_operand;

-   ir_to_mesa_src_reg a, b, c;

-

-   ir_expression *expr = ir->operands[mul_operand]->as_expression();

-   if (!expr || expr->operation != ir_binop_mul)

-      return false;

-

-   expr->operands[0]->accept(this);

-   a = this->result;

-   expr->operands[1]->accept(this);

-   b = this->result;

-   ir->operands[nonmul_operand]->accept(this);

-   c = this->result;

-

-   this->result = get_temp(ir->type);

-   ir_to_mesa_emit_op3(ir, OPCODE_MAD,

-		       ir_to_mesa_dst_reg_from_src(this->result), a, b, c);

-

-   return true;

-}

-

-GLboolean

-ir_to_mesa_visitor::try_emit_sat(ir_expression *ir)

-{

-   /* Saturates were only introduced to vertex programs in

-    * NV_vertex_program3, so don't give them to drivers in the VP.

-    */

-   if (this->prog->Target == GL_VERTEX_PROGRAM_ARB)

-      return false;

-

-   ir_rvalue *sat_src = ir->as_rvalue_to_saturate();

-   if (!sat_src)

-      return false;

-

-   sat_src->accept(this);

-   ir_to_mesa_src_reg src = this->result;

-

-   this->result = get_temp(ir->type);

-   ir_to_mesa_instruction *inst;

-   inst = ir_to_mesa_emit_op1(ir, OPCODE_MOV,

-			      ir_to_mesa_dst_reg_from_src(this->result),

-			      src);

-   inst->saturate = true;

-

-   return true;

-}

-

-void

-ir_to_mesa_visitor::reladdr_to_temp(ir_instruction *ir,

-				    ir_to_mesa_src_reg *reg, int *num_reladdr)

-{

-   if (!reg->reladdr)

-      return;

-

-   ir_to_mesa_emit_op1(ir, OPCODE_ARL, ir_to_mesa_address_reg, *reg->reladdr);

-

-   if (*num_reladdr != 1) {

-      ir_to_mesa_src_reg temp = get_temp(glsl_type::vec4_type);

-

-      ir_to_mesa_emit_op1(ir, OPCODE_MOV,

-			  ir_to_mesa_dst_reg_from_src(temp), *reg);

-      *reg = temp;

-   }

-

-   (*num_reladdr)--;

-}

-

-void

-ir_to_mesa_visitor::emit_swz(ir_expression *ir)

-{

-   /* Assume that the vector operator is in a form compatible with OPCODE_SWZ.

-    * This means that each of the operands is either an immediate value of -1,

-    * 0, or 1, or is a component from one source register (possibly with

-    * negation).

-    */

-   uint8_t components[4] = { 0 };

-   bool negate[4] = { false };

-   ir_variable *var = NULL;

-

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

-      ir_rvalue *op = ir->operands[i];

-

-      assert(op->type->is_scalar());

-

-      while (op != NULL) {

-	 switch (op->ir_type) {

-	 case ir_type_constant: {

-

-	    assert(op->type->is_scalar());

-

-	    const ir_constant *const c = op->as_constant();

-	    if (c->is_one()) {

-	       components[i] = SWIZZLE_ONE;

-	    } else if (c->is_zero()) {

-	       components[i] = SWIZZLE_ZERO;

-	    } else if (c->is_negative_one()) {

-	       components[i] = SWIZZLE_ONE;

-	       negate[i] = true;

-	    } else {

-	       assert(!"SWZ constant must be 0.0 or 1.0.");

-	    }

-

-	    op = NULL;

-	    break;

-	 }

-

-	 case ir_type_dereference_variable: {

-	    ir_dereference_variable *const deref =

-	       (ir_dereference_variable *) op;

-

-	    assert((var == NULL) || (deref->var == var));

-	    components[i] = SWIZZLE_X;

-	    var = deref->var;

-	    op = NULL;

-	    break;

-	 }

-

-	 case ir_type_expression: {

-	    ir_expression *const expr = (ir_expression *) op;

-

-	    assert(expr->operation == ir_unop_neg);

-	    negate[i] = true;

-

-	    op = expr->operands[0];

-	    break;

-	 }

-

-	 case ir_type_swizzle: {

-	    ir_swizzle *const swiz = (ir_swizzle *) op;

-

-	    components[i] = swiz->mask.x;

-	    op = swiz->val;

-	    break;

-	 }

-

-	 default:

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

-	    return;

-	 }

-      }

-   }

-

-   assert(var != NULL);

-

-   ir_dereference_variable *const deref =

-      new(mem_ctx) ir_dereference_variable(var);

-

-   this->result.file = PROGRAM_UNDEFINED;

-   deref->accept(this);

-   if (this->result.file == PROGRAM_UNDEFINED) {

-      ir_print_visitor v;

-      printf("Failed to get tree for expression operand:\n");

-      deref->accept(&v);

-      exit(1);

-   }

-

-   ir_to_mesa_src_reg src;

-

-   src = this->result;

-   src.swizzle = MAKE_SWIZZLE4(components[0],

-			       components[1],

-			       components[2],

-			       components[3]);

-   src.negate = ((unsigned(negate[0]) << 0)

-		 | (unsigned(negate[1]) << 1)

-		 | (unsigned(negate[2]) << 2)

-		 | (unsigned(negate[3]) << 3));

-

-   /* Storage for our result.  Ideally for an assignment we'd be using the

-    * actual storage for the result here, instead.

-    */

-   const ir_to_mesa_src_reg result_src = get_temp(ir->type);

-   ir_to_mesa_dst_reg result_dst = ir_to_mesa_dst_reg_from_src(result_src);

-

-   /* Limit writes to the channels that will be used by result_src later.

-    * This does limit this temp's use as a temporary for multi-instruction

-    * sequences.

-    */

-   result_dst.writemask = (1 << ir->type->vector_elements) - 1;

-

-   ir_to_mesa_emit_op1(ir, OPCODE_SWZ, result_dst, src);

-   this->result = result_src;

-}

-

-void

-ir_to_mesa_visitor::visit(ir_expression *ir)

-{

-   unsigned int operand;

-   struct ir_to_mesa_src_reg op[Elements(ir->operands)];

-   struct ir_to_mesa_src_reg result_src;

-   struct ir_to_mesa_dst_reg result_dst;

-

-   /* Quick peephole: Emit OPCODE_MAD(a, b, c) instead of ADD(MUL(a, b), c)

-    */

-   if (ir->operation == ir_binop_add) {

-      if (try_emit_mad(ir, 1))

-	 return;

-      if (try_emit_mad(ir, 0))

-	 return;

-   }

-   if (try_emit_sat(ir))

-      return;

-

-   if (ir->operation == ir_quadop_vector) {

-      this->emit_swz(ir);

-      return;

-   }

-

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

-      this->result.file = PROGRAM_UNDEFINED;

-      ir->operands[operand]->accept(this);

-      if (this->result.file == PROGRAM_UNDEFINED) {

-	 ir_print_visitor v;

-	 printf("Failed to get tree for expression operand:\n");

-	 ir->operands[operand]->accept(&v);

-	 exit(1);

-      }

-      op[operand] = this->result;

-

-      /* Matrix expression operands should have been broken down to vector

-       * operations already.

-       */

-      assert(!ir->operands[operand]->type->is_matrix());

-   }

-

-   int vector_elements = ir->operands[0]->type->vector_elements;

-   if (ir->operands[1]) {

-      vector_elements = MAX2(vector_elements,

-			     ir->operands[1]->type->vector_elements);

-   }

-

-   this->result.file = PROGRAM_UNDEFINED;

-

-   /* Storage for our result.  Ideally for an assignment we'd be using

-    * the actual storage for the result here, instead.

-    */

-   result_src = get_temp(ir->type);

-   /* convenience for the emit functions below. */

-   result_dst = ir_to_mesa_dst_reg_from_src(result_src);

-   /* Limit writes to the channels that will be used by result_src later.

-    * This does limit this temp's use as a temporary for multi-instruction

-    * sequences.

-    */

-   result_dst.writemask = (1 << ir->type->vector_elements) - 1;

-

-   switch (ir->operation) {

-   case ir_unop_logic_not:

-      ir_to_mesa_emit_op2(ir, OPCODE_SEQ, result_dst,

-			  op[0], src_reg_for_float(0.0));

-      break;

-   case ir_unop_neg:

-      op[0].negate = ~op[0].negate;

-      result_src = op[0];

-      break;

-   case ir_unop_abs:

-      ir_to_mesa_emit_op1(ir, OPCODE_ABS, result_dst, op[0]);

-      break;

-   case ir_unop_sign:

-      ir_to_mesa_emit_op1(ir, OPCODE_SSG, result_dst, op[0]);

-      break;

-   case ir_unop_rcp:

-      ir_to_mesa_emit_scalar_op1(ir, OPCODE_RCP, result_dst, op[0]);

-      break;

-

-   case ir_unop_exp2:

-      ir_to_mesa_emit_scalar_op1(ir, OPCODE_EX2, result_dst, op[0]);

-      break;

-   case ir_unop_exp:

-   case ir_unop_log:

-      assert(!"not reached: should be handled by ir_explog_to_explog2");

-      break;

-   case ir_unop_log2:

-      ir_to_mesa_emit_scalar_op1(ir, OPCODE_LG2, result_dst, op[0]);

-      break;

-   case ir_unop_sin:

-      ir_to_mesa_emit_scalar_op1(ir, OPCODE_SIN, result_dst, op[0]);

-      break;

-   case ir_unop_cos:

-      ir_to_mesa_emit_scalar_op1(ir, OPCODE_COS, result_dst, op[0]);

-      break;

-   case ir_unop_sin_reduced:

-      emit_scs(ir, OPCODE_SIN, result_dst, op[0]);

-      break;

-   case ir_unop_cos_reduced:

-      emit_scs(ir, OPCODE_COS, result_dst, op[0]);

-      break;

-

-   case ir_unop_dFdx:

-      ir_to_mesa_emit_op1(ir, OPCODE_DDX, result_dst, op[0]);

-      break;

-   case ir_unop_dFdy:

-      ir_to_mesa_emit_op1(ir, OPCODE_DDY, result_dst, op[0]);

-      break;

-

-   case ir_unop_noise: {

-      const enum prog_opcode opcode =

-	 prog_opcode(OPCODE_NOISE1

-		     + (ir->operands[0]->type->vector_elements) - 1);

-      assert((opcode >= OPCODE_NOISE1) && (opcode <= OPCODE_NOISE4));

-

-      ir_to_mesa_emit_op1(ir, opcode, result_dst, op[0]);

-      break;

-   }

-

-   case ir_binop_add:

-      ir_to_mesa_emit_op2(ir, OPCODE_ADD, result_dst, op[0], op[1]);

-      break;

-   case ir_binop_sub:

-      ir_to_mesa_emit_op2(ir, OPCODE_SUB, result_dst, op[0], op[1]);

-      break;

-

-   case ir_binop_mul:

-      ir_to_mesa_emit_op2(ir, OPCODE_MUL, result_dst, op[0], op[1]);

-      break;

-   case ir_binop_div:

-      assert(!"not reached: should be handled by ir_div_to_mul_rcp");

-   case ir_binop_mod:

-      assert(!"ir_binop_mod should have been converted to b * fract(a/b)");

-      break;

-

-   case ir_binop_less:

-      ir_to_mesa_emit_op2(ir, OPCODE_SLT, result_dst, op[0], op[1]);

-      break;

-   case ir_binop_greater:

-      ir_to_mesa_emit_op2(ir, OPCODE_SGT, result_dst, op[0], op[1]);

-      break;

-   case ir_binop_lequal:

-      ir_to_mesa_emit_op2(ir, OPCODE_SLE, result_dst, op[0], op[1]);

-      break;

-   case ir_binop_gequal:

-      ir_to_mesa_emit_op2(ir, OPCODE_SGE, result_dst, op[0], op[1]);

-      break;

-   case ir_binop_equal:

-      ir_to_mesa_emit_op2(ir, OPCODE_SEQ, result_dst, op[0], op[1]);

-      break;

-   case ir_binop_nequal:

-      ir_to_mesa_emit_op2(ir, OPCODE_SNE, result_dst, op[0], op[1]);

-      break;

-   case ir_binop_all_equal:

-      /* "==" operator producing a scalar boolean. */

-      if (ir->operands[0]->type->is_vector() ||

-	  ir->operands[1]->type->is_vector()) {

-	 ir_to_mesa_src_reg temp = get_temp(glsl_type::vec4_type);

-	 ir_to_mesa_emit_op2(ir, OPCODE_SNE,

-			     ir_to_mesa_dst_reg_from_src(temp), op[0], op[1]);

-	 ir_to_mesa_emit_dp(ir, result_dst, temp, temp, vector_elements);

-	 ir_to_mesa_emit_op2(ir, OPCODE_SEQ,

-			     result_dst, result_src, src_reg_for_float(0.0));

-      } else {

-	 ir_to_mesa_emit_op2(ir, OPCODE_SEQ, result_dst, op[0], op[1]);

-      }

-      break;

-   case ir_binop_any_nequal:

-      /* "!=" operator producing a scalar boolean. */

-      if (ir->operands[0]->type->is_vector() ||

-	  ir->operands[1]->type->is_vector()) {

-	 ir_to_mesa_src_reg temp = get_temp(glsl_type::vec4_type);

-	 ir_to_mesa_emit_op2(ir, OPCODE_SNE,

-			     ir_to_mesa_dst_reg_from_src(temp), op[0], op[1]);

-	 ir_to_mesa_emit_dp(ir, result_dst, temp, temp, vector_elements);

-	 ir_to_mesa_emit_op2(ir, OPCODE_SNE,

-			     result_dst, result_src, src_reg_for_float(0.0));

-      } else {

-	 ir_to_mesa_emit_op2(ir, OPCODE_SNE, result_dst, op[0], op[1]);

-      }

-      break;

-

-   case ir_unop_any:

-      assert(ir->operands[0]->type->is_vector());

-      ir_to_mesa_emit_dp(ir, result_dst, op[0], op[0],

-			 ir->operands[0]->type->vector_elements);

-      ir_to_mesa_emit_op2(ir, OPCODE_SNE,

-			  result_dst, result_src, src_reg_for_float(0.0));

-      break;

-

-   case ir_binop_logic_xor:

-      ir_to_mesa_emit_op2(ir, OPCODE_SNE, result_dst, op[0], op[1]);

-      break;

-

-   case ir_binop_logic_or:

-      /* This could be a saturated add and skip the SNE. */

-      ir_to_mesa_emit_op2(ir, OPCODE_ADD,

-			  result_dst,

-			  op[0], op[1]);

-

-      ir_to_mesa_emit_op2(ir, OPCODE_SNE,

-			  result_dst,

-			  result_src, src_reg_for_float(0.0));

-      break;

-

-   case ir_binop_logic_and:

-      /* the bool args are stored as float 0.0 or 1.0, so "mul" gives us "and". */

-      ir_to_mesa_emit_op2(ir, OPCODE_MUL,

-			  result_dst,

-			  op[0], op[1]);

-      break;

-

-   case ir_binop_dot:

-      assert(ir->operands[0]->type->is_vector());

-      assert(ir->operands[0]->type == ir->operands[1]->type);

-      ir_to_mesa_emit_dp(ir, result_dst, op[0], op[1],

-			 ir->operands[0]->type->vector_elements);

-      break;

-

-   case ir_unop_sqrt:

-      /* sqrt(x) = x * rsq(x). */

-      ir_to_mesa_emit_scalar_op1(ir, OPCODE_RSQ, result_dst, op[0]);

-      ir_to_mesa_emit_op2(ir, OPCODE_MUL, result_dst, result_src, op[0]);

-      /* For incoming channels <= 0, set the result to 0. */

-      op[0].negate = ~op[0].negate;

-      ir_to_mesa_emit_op3(ir, OPCODE_CMP, result_dst,

-			  op[0], result_src, src_reg_for_float(0.0));

-      break;

-   case ir_unop_rsq:

-      ir_to_mesa_emit_scalar_op1(ir, OPCODE_RSQ, result_dst, op[0]);

-      break;

-   case ir_unop_i2f:

-   case ir_unop_b2f:

-   case ir_unop_b2i:

-      /* Mesa IR lacks types, ints are stored as truncated floats. */

-      result_src = op[0];

-      break;

-   case ir_unop_f2i:

-      ir_to_mesa_emit_op1(ir, OPCODE_TRUNC, result_dst, op[0]);

-      break;

-   case ir_unop_f2b:

-   case ir_unop_i2b:

-      ir_to_mesa_emit_op2(ir, OPCODE_SNE, result_dst,

-			  op[0], src_reg_for_float(0.0));

-      break;

-   case ir_unop_trunc:

-      ir_to_mesa_emit_op1(ir, OPCODE_TRUNC, result_dst, op[0]);

-      break;

-   case ir_unop_ceil:

-      op[0].negate = ~op[0].negate;

-      ir_to_mesa_emit_op1(ir, OPCODE_FLR, result_dst, op[0]);

-      result_src.negate = ~result_src.negate;

-      break;

-   case ir_unop_floor:

-      ir_to_mesa_emit_op1(ir, OPCODE_FLR, result_dst, op[0]);

-      break;

-   case ir_unop_fract:

-      ir_to_mesa_emit_op1(ir, OPCODE_FRC, result_dst, op[0]);

-      break;

-

-   case ir_binop_min:

-      ir_to_mesa_emit_op2(ir, OPCODE_MIN, result_dst, op[0], op[1]);

-      break;

-   case ir_binop_max:

-      ir_to_mesa_emit_op2(ir, OPCODE_MAX, result_dst, op[0], op[1]);

-      break;

-   case ir_binop_pow:

-      ir_to_mesa_emit_scalar_op2(ir, OPCODE_POW, result_dst, op[0], op[1]);

-      break;

-

-   case ir_unop_bit_not:

-   case ir_unop_u2f:

-   case ir_binop_lshift:

-   case ir_binop_rshift:

-   case ir_binop_bit_and:

-   case ir_binop_bit_xor:

-   case ir_binop_bit_or:

-   case ir_unop_round_even:

-      assert(!"GLSL 1.30 features unsupported");

-      break;

-

-   case ir_quadop_vector:

-      /* This operation should have already been handled.

-       */

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

-      break;

-   }

-

-   this->result = result_src;

-}

-

-

-void

-ir_to_mesa_visitor::visit(ir_swizzle *ir)

-{

-   ir_to_mesa_src_reg src_reg;

-   int i;

-   int swizzle[4];

-

-   /* Note that this is only swizzles in expressions, not those on the left

-    * hand side of an assignment, which do write masking.  See ir_assignment

-    * for that.

-    */

-

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

-   src_reg = this->result;

-   assert(src_reg.file != PROGRAM_UNDEFINED);

-

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

-      if (i < ir->type->vector_elements) {

-	 switch (i) {

-	 case 0:

-	    swizzle[i] = GET_SWZ(src_reg.swizzle, ir->mask.x);

-	    break;

-	 case 1:

-	    swizzle[i] = GET_SWZ(src_reg.swizzle, ir->mask.y);

-	    break;

-	 case 2:

-	    swizzle[i] = GET_SWZ(src_reg.swizzle, ir->mask.z);

-	    break;

-	 case 3:

-	    swizzle[i] = GET_SWZ(src_reg.swizzle, ir->mask.w);

-	    break;

-	 }

-      } else {

-	 /* If the type is smaller than a vec4, replicate the last

-	  * channel out.

-	  */

-	 swizzle[i] = swizzle[ir->type->vector_elements - 1];

-      }

-   }

-

-   src_reg.swizzle = MAKE_SWIZZLE4(swizzle[0],

-				   swizzle[1],

-				   swizzle[2],

-				   swizzle[3]);

-

-   this->result = src_reg;

-}

-

-void

-ir_to_mesa_visitor::visit(ir_dereference_variable *ir)

-{

-   variable_storage *entry = find_variable_storage(ir->var);

-   ir_variable *var = ir->var;

-

-   if (!entry) {

-      switch (var->mode) {

-      case ir_var_uniform:

-	 entry = new(mem_ctx) variable_storage(var, PROGRAM_UNIFORM,

-					       var->location);

-	 this->variables.push_tail(entry);

-	 break;

-      case ir_var_in:

-      case ir_var_inout:

-	 /* The linker assigns locations for varyings and attributes,

-	  * including deprecated builtins (like gl_Color), user-assign

-	  * generic attributes (glBindVertexLocation), and

-	  * user-defined varyings.

-	  *

-	  * FINISHME: We would hit this path for function arguments.  Fix!

-	  */

-	 assert(var->location != -1);

-         entry = new(mem_ctx) variable_storage(var,

-                                               PROGRAM_INPUT,

-                                               var->location);

-         if (this->prog->Target == GL_VERTEX_PROGRAM_ARB &&

-             var->location >= VERT_ATTRIB_GENERIC0) {

-            _mesa_add_attribute(this->prog->Attributes,

-                                var->name,

-                                _mesa_sizeof_glsl_type(var->type->gl_type),

-                                var->type->gl_type,

-                                var->location - VERT_ATTRIB_GENERIC0);

-         }

-         break;

-      case ir_var_out:

-	 assert(var->location != -1);

-         entry = new(mem_ctx) variable_storage(var,

-                                               PROGRAM_OUTPUT,

-                                               var->location);

-	 break;

-      case ir_var_system_value:

-         entry = new(mem_ctx) variable_storage(var,

-                                               PROGRAM_SYSTEM_VALUE,

-                                               var->location);

-         break;

-      case ir_var_auto:

-      case ir_var_temporary:

-	 entry = new(mem_ctx) variable_storage(var, PROGRAM_TEMPORARY,

-					       this->next_temp);

-	 this->variables.push_tail(entry);

-

-	 next_temp += type_size(var->type);

-	 break;

-      }

-

-      if (!entry) {

-	 printf("Failed to make storage for %s\n", var->name);

-	 exit(1);

-      }

-   }

-

-   this->result = ir_to_mesa_src_reg(entry->file, entry->index, var->type);

-}

-

-void

-ir_to_mesa_visitor::visit(ir_dereference_array *ir)

-{

-   ir_constant *index;

-   ir_to_mesa_src_reg src_reg;

-   int element_size = type_size(ir->type);

-

-   index = ir->array_index->constant_expression_value();

-

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

-   src_reg = this->result;

-

-   if (index) {

-      src_reg.index += index->value.i[0] * element_size;

-   } else {

-      ir_to_mesa_src_reg array_base = this->result;

-      /* Variable index array dereference.  It eats the "vec4" of the

-       * base of the array and an index that offsets the Mesa register

-       * index.

-       */

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

-

-      ir_to_mesa_src_reg index_reg;

-

-      if (element_size == 1) {

-	 index_reg = this->result;

-      } else {

-	 index_reg = get_temp(glsl_type::float_type);

-

-	 ir_to_mesa_emit_op2(ir, OPCODE_MUL,

-			     ir_to_mesa_dst_reg_from_src(index_reg),

-			     this->result, src_reg_for_float(element_size));

-      }

-

-      src_reg.reladdr = ralloc(mem_ctx, ir_to_mesa_src_reg);

-      memcpy(src_reg.reladdr, &index_reg, sizeof(index_reg));

-   }

-

-   /* If the type is smaller than a vec4, replicate the last channel out. */

-   if (ir->type->is_scalar() || ir->type->is_vector())

-      src_reg.swizzle = swizzle_for_size(ir->type->vector_elements);

-   else

-      src_reg.swizzle = SWIZZLE_NOOP;

-

-   this->result = src_reg;

-}

-

-void

-ir_to_mesa_visitor::visit(ir_dereference_record *ir)

-{

-   unsigned int i;

-   const glsl_type *struct_type = ir->record->type;

-   int offset = 0;

-

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

-

-   for (i = 0; i < struct_type->length; i++) {

-      if (strcmp(struct_type->fields.structure[i].name, ir->field) == 0)

-	 break;

-      offset += type_size(struct_type->fields.structure[i].type);

-   }

-

-   /* If the type is smaller than a vec4, replicate the last channel out. */

-   if (ir->type->is_scalar() || ir->type->is_vector())

-      this->result.swizzle = swizzle_for_size(ir->type->vector_elements);

-   else

-      this->result.swizzle = SWIZZLE_NOOP;

-

-   this->result.index += offset;

-}

-

-/**

- * We want to be careful in assignment setup to hit the actual storage

- * instead of potentially using a temporary like we might with the

- * ir_dereference handler.

- */

-static struct ir_to_mesa_dst_reg

-get_assignment_lhs(ir_dereference *ir, ir_to_mesa_visitor *v)

-{

-   /* The LHS must be a dereference.  If the LHS is a variable indexed array

-    * access of a vector, it must be separated into a series conditional moves

-    * before reaching this point (see ir_vec_index_to_cond_assign).

-    */

-   assert(ir->as_dereference());

-   ir_dereference_array *deref_array = ir->as_dereference_array();

-   if (deref_array) {

-      assert(!deref_array->array->type->is_vector());

-   }

-

-   /* Use the rvalue deref handler for the most part.  We'll ignore

-    * swizzles in it and write swizzles using writemask, though.

-    */

-   ir->accept(v);

-   return ir_to_mesa_dst_reg_from_src(v->result);

-}

-

-/**

- * Process the condition of a conditional assignment

- *

- * Examines the condition of a conditional assignment to generate the optimal

- * first operand of a \c CMP instruction.  If the condition is a relational

- * operator with 0 (e.g., \c ir_binop_less), the value being compared will be

- * used as the source for the \c CMP instruction.  Otherwise the comparison

- * is processed to a boolean result, and the boolean result is used as the

- * operand to the CMP instruction.

- */

-bool

-ir_to_mesa_visitor::process_move_condition(ir_rvalue *ir)

-{

-   ir_rvalue *src_ir = ir;

-   bool negate = true;

-   bool switch_order = false;

-

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

-   if ((expr != NULL) && (expr->get_num_operands() == 2)) {

-      bool zero_on_left = false;

-

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

-	 src_ir = expr->operands[1];

-	 zero_on_left = true;

-      } else if (expr->operands[1]->is_zero()) {

-	 src_ir = expr->operands[0];

-	 zero_on_left = false;

-      }

-

-      /*      a is -  0  +            -  0  +

-       * (a <  0)  T  F  F  ( a < 0)  T  F  F

-       * (0 <  a)  F  F  T  (-a < 0)  F  F  T

-       * (a <= 0)  T  T  F  (-a < 0)  F  F  T  (swap order of other operands)

-       * (0 <= a)  F  T  T  ( a < 0)  T  F  F  (swap order of other operands)

-       * (a >  0)  F  F  T  (-a < 0)  F  F  T

-       * (0 >  a)  T  F  F  ( a < 0)  T  F  F

-       * (a >= 0)  F  T  T  ( a < 0)  T  F  F  (swap order of other operands)

-       * (0 >= a)  T  T  F  (-a < 0)  F  F  T  (swap order of other operands)

-       *

-       * Note that exchanging the order of 0 and 'a' in the comparison simply

-       * means that the value of 'a' should be negated.

-       */

-      if (src_ir != ir) {

-	 switch (expr->operation) {

-	 case ir_binop_less:

-	    switch_order = false;

-	    negate = zero_on_left;

-	    break;

-

-	 case ir_binop_greater:

-	    switch_order = false;

-	    negate = !zero_on_left;

-	    break;

-

-	 case ir_binop_lequal:

-	    switch_order = true;

-	    negate = !zero_on_left;

-	    break;

-

-	 case ir_binop_gequal:

-	    switch_order = true;

-	    negate = zero_on_left;

-	    break;

-

-	 default:

-	    /* This isn't the right kind of comparison afterall, so make sure

-	     * the whole condition is visited.

-	     */

-	    src_ir = ir;

-	    break;

-	 }

-      }

-   }

-

-   src_ir->accept(this);

-

-   /* We use the OPCODE_CMP (a < 0 ? b : c) for conditional moves, and the

-    * condition we produced is 0.0 or 1.0.  By flipping the sign, we can

-    * choose which value OPCODE_CMP produces without an extra instruction

-    * computing the condition.

-    */

-   if (negate)

-      this->result.negate = ~this->result.negate;

-

-   return switch_order;

-}

-

-void

-ir_to_mesa_visitor::visit(ir_assignment *ir)

-{

-   struct ir_to_mesa_dst_reg l;

-   struct ir_to_mesa_src_reg r;

-   int i;

-

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

-   r = this->result;

-

-   l = get_assignment_lhs(ir->lhs, this);

-

-   /* FINISHME: This should really set to the correct maximal writemask for each

-    * FINISHME: component written (in the loops below).  This case can only

-    * FINISHME: occur for matrices, arrays, and structures.

-    */

-   if (ir->write_mask == 0) {

-      assert(!ir->lhs->type->is_scalar() && !ir->lhs->type->is_vector());

-      l.writemask = WRITEMASK_XYZW;

-   } else if (ir->lhs->type->is_scalar()) {

-      /* FINISHME: This hack makes writing to gl_FragDepth, which lives in the

-       * FINISHME: W component of fragment shader output zero, work correctly.

-       */

-      l.writemask = WRITEMASK_XYZW;

-   } else {

-      int swizzles[4];

-      int first_enabled_chan = 0;

-      int rhs_chan = 0;

-

-      assert(ir->lhs->type->is_vector());

-      l.writemask = ir->write_mask;

-

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

-	 if (l.writemask & (1 << i)) {

-	    first_enabled_chan = GET_SWZ(r.swizzle, i);

-	    break;

-	 }

-      }

-

-      /* Swizzle a small RHS vector into the channels being written.

-       *

-       * glsl ir treats write_mask as dictating how many channels are

-       * present on the RHS while Mesa IR treats write_mask as just

-       * showing which channels of the vec4 RHS get written.

-       */

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

-	 if (l.writemask & (1 << i))

-	    swizzles[i] = GET_SWZ(r.swizzle, rhs_chan++);

-	 else

-	    swizzles[i] = first_enabled_chan;

-      }

-      r.swizzle = MAKE_SWIZZLE4(swizzles[0], swizzles[1],

-				swizzles[2], swizzles[3]);

-   }

-

-   assert(l.file != PROGRAM_UNDEFINED);

-   assert(r.file != PROGRAM_UNDEFINED);

-

-   if (ir->condition) {

-      const bool switch_order = this->process_move_condition(ir->condition);

-      ir_to_mesa_src_reg condition = this->result;

-

-      for (i = 0; i < type_size(ir->lhs->type); i++) {

-	 if (switch_order) {

-	    ir_to_mesa_emit_op3(ir, OPCODE_CMP, l,

-				condition, ir_to_mesa_src_reg_from_dst(l), r);

-	 } else {

-	    ir_to_mesa_emit_op3(ir, OPCODE_CMP, l,

-				condition, r, ir_to_mesa_src_reg_from_dst(l));

-	 }

-

-	 l.index++;

-	 r.index++;

-      }

-   } else {

-      for (i = 0; i < type_size(ir->lhs->type); i++) {

-	 ir_to_mesa_emit_op1(ir, OPCODE_MOV, l, r);

-	 l.index++;

-	 r.index++;

-      }

-   }

-}

-

-

-void

-ir_to_mesa_visitor::visit(ir_constant *ir)

-{

-   ir_to_mesa_src_reg src_reg;

-   GLfloat stack_vals[4] = { 0 };

-   GLfloat *values = stack_vals;

-   unsigned int i;

-

-   /* Unfortunately, 4 floats is all we can get into

-    * _mesa_add_unnamed_constant.  So, make a temp to store an

-    * aggregate constant and move each constant value into it.  If we

-    * get lucky, copy propagation will eliminate the extra moves.

-    */

-

-   if (ir->type->base_type == GLSL_TYPE_STRUCT) {

-      ir_to_mesa_src_reg temp_base = get_temp(ir->type);

-      ir_to_mesa_dst_reg temp = ir_to_mesa_dst_reg_from_src(temp_base);

-

-      foreach_iter(exec_list_iterator, iter, ir->components) {

-	 ir_constant *field_value = (ir_constant *)iter.get();

-	 int size = type_size(field_value->type);

-

-	 assert(size > 0);

-

-	 field_value->accept(this);

-	 src_reg = this->result;

-

-	 for (i = 0; i < (unsigned int)size; i++) {

-	    ir_to_mesa_emit_op1(ir, OPCODE_MOV, temp, src_reg);

-

-	    src_reg.index++;

-	    temp.index++;

-	 }

-      }

-      this->result = temp_base;

-      return;

-   }

-

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

-      ir_to_mesa_src_reg temp_base = get_temp(ir->type);

-      ir_to_mesa_dst_reg temp = ir_to_mesa_dst_reg_from_src(temp_base);

-      int size = type_size(ir->type->fields.array);

-

-      assert(size > 0);

-

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

-	 ir->array_elements[i]->accept(this);

-	 src_reg = this->result;

-	 for (int j = 0; j < size; j++) {

-	    ir_to_mesa_emit_op1(ir, OPCODE_MOV, temp, src_reg);

-

-	    src_reg.index++;

-	    temp.index++;

-	 }

-      }

-      this->result = temp_base;

-      return;

-   }

-

-   if (ir->type->is_matrix()) {

-      ir_to_mesa_src_reg mat = get_temp(ir->type);

-      ir_to_mesa_dst_reg mat_column = ir_to_mesa_dst_reg_from_src(mat);

-

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

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

-	 values = &ir->value.f[i * ir->type->vector_elements];

-

-	 src_reg = ir_to_mesa_src_reg(PROGRAM_CONSTANT, -1, NULL);

-	 src_reg.index = _mesa_add_unnamed_constant(this->prog->Parameters,

-						values,

-						ir->type->vector_elements,

-						&src_reg.swizzle);

-	 ir_to_mesa_emit_op1(ir, OPCODE_MOV, mat_column, src_reg);

-

-	 mat_column.index++;

-      }

-

-      this->result = mat;

-      return;

-   }

-

-   src_reg.file = PROGRAM_CONSTANT;

-   switch (ir->type->base_type) {

-   case GLSL_TYPE_FLOAT:

-      values = &ir->value.f[0];

-      break;

-   case GLSL_TYPE_UINT:

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

-	 values[i] = ir->value.u[i];

-      }

-      break;

-   case GLSL_TYPE_INT:

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

-	 values[i] = ir->value.i[i];

-      }

-      break;

-   case GLSL_TYPE_BOOL:

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

-	 values[i] = ir->value.b[i];

-      }

-      break;

-   default:

-      assert(!"Non-float/uint/int/bool constant");

-   }

-

-   this->result = ir_to_mesa_src_reg(PROGRAM_CONSTANT, -1, ir->type);

-   this->result.index = _mesa_add_unnamed_constant(this->prog->Parameters,

-						   values,

-						   ir->type->vector_elements,

-						   &this->result.swizzle);

-}

-

-function_entry *

-ir_to_mesa_visitor::get_function_signature(ir_function_signature *sig)

-{

-   function_entry *entry;

-

-   foreach_iter(exec_list_iterator, iter, this->function_signatures) {

-      entry = (function_entry *)iter.get();

-

-      if (entry->sig == sig)

-	 return entry;

-   }

-

-   entry = ralloc(mem_ctx, function_entry);

-   entry->sig = sig;

-   entry->sig_id = this->next_signature_id++;

-   entry->bgn_inst = NULL;

-

-   /* Allocate storage for all the parameters. */

-   foreach_iter(exec_list_iterator, iter, sig->parameters) {

-      ir_variable *param = (ir_variable *)iter.get();

-      variable_storage *storage;

-

-      storage = find_variable_storage(param);

-      assert(!storage);

-

-      storage = new(mem_ctx) variable_storage(param, PROGRAM_TEMPORARY,

-					      this->next_temp);

-      this->variables.push_tail(storage);

-

-      this->next_temp += type_size(param->type);

-   }

-

-   if (!sig->return_type->is_void()) {

-      entry->return_reg = get_temp(sig->return_type);

-   } else {

-      entry->return_reg = ir_to_mesa_undef;

-   }

-

-   this->function_signatures.push_tail(entry);

-   return entry;

-}

-

-void

-ir_to_mesa_visitor::visit(ir_call *ir)

-{

-   ir_to_mesa_instruction *call_inst;

-   ir_function_signature *sig = ir->get_callee();

-   function_entry *entry = get_function_signature(sig);

-   int i;

-

-   /* Process in parameters. */

-   exec_list_iterator sig_iter = sig->parameters.iterator();

-   foreach_iter(exec_list_iterator, iter, *ir) {

-      ir_rvalue *param_rval = (ir_rvalue *)iter.get();

-      ir_variable *param = (ir_variable *)sig_iter.get();

-

-      if (param->mode == ir_var_in ||

-	  param->mode == ir_var_inout) {

-	 variable_storage *storage = find_variable_storage(param);

-	 assert(storage);

-

-	 param_rval->accept(this);

-	 ir_to_mesa_src_reg r = this->result;

-

-	 ir_to_mesa_dst_reg l;

-	 l.file = storage->file;

-	 l.index = storage->index;

-	 l.reladdr = NULL;

-	 l.writemask = WRITEMASK_XYZW;

-	 l.cond_mask = COND_TR;

-

-	 for (i = 0; i < type_size(param->type); i++) {

-	    ir_to_mesa_emit_op1(ir, OPCODE_MOV, l, r);

-	    l.index++;

-	    r.index++;

-	 }

-      }

-

-      sig_iter.next();

-   }

-   assert(!sig_iter.has_next());

-

-   /* Emit call instruction */

-   call_inst = ir_to_mesa_emit_op1(ir, OPCODE_CAL,

-				   ir_to_mesa_undef_dst, ir_to_mesa_undef);

-   call_inst->function = entry;

-

-   /* Process out parameters. */

-   sig_iter = sig->parameters.iterator();

-   foreach_iter(exec_list_iterator, iter, *ir) {

-      ir_rvalue *param_rval = (ir_rvalue *)iter.get();

-      ir_variable *param = (ir_variable *)sig_iter.get();

-

-      if (param->mode == ir_var_out ||

-	  param->mode == ir_var_inout) {

-	 variable_storage *storage = find_variable_storage(param);

-	 assert(storage);

-

-	 ir_to_mesa_src_reg r;

-	 r.file = storage->file;

-	 r.index = storage->index;

-	 r.reladdr = NULL;

-	 r.swizzle = SWIZZLE_NOOP;

-	 r.negate = 0;

-

-	 param_rval->accept(this);

-	 ir_to_mesa_dst_reg l = ir_to_mesa_dst_reg_from_src(this->result);

-

-	 for (i = 0; i < type_size(param->type); i++) {

-	    ir_to_mesa_emit_op1(ir, OPCODE_MOV, l, r);

-	    l.index++;

-	    r.index++;

-	 }

-      }

-

-      sig_iter.next();

-   }

-   assert(!sig_iter.has_next());

-

-   /* Process return value. */

-   this->result = entry->return_reg;

-}

-

-void

-ir_to_mesa_visitor::visit(ir_texture *ir)

-{

-   ir_to_mesa_src_reg result_src, coord, lod_info, projector;

-   ir_to_mesa_dst_reg result_dst, coord_dst;

-   ir_to_mesa_instruction *inst = NULL;

-   prog_opcode opcode = OPCODE_NOP;

-

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

-

-   /* Put our coords in a temp.  We'll need to modify them for shadow,

-    * projection, or LOD, so the only case we'd use it as is is if

-    * we're doing plain old texturing.  Mesa IR optimization should

-    * handle cleaning up our mess in that case.

-    */

-   coord = get_temp(glsl_type::vec4_type);

-   coord_dst = ir_to_mesa_dst_reg_from_src(coord);

-   ir_to_mesa_emit_op1(ir, OPCODE_MOV, coord_dst,

-		       this->result);

-

-   if (ir->projector) {

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

-      projector = this->result;

-   }

-

-   /* Storage for our result.  Ideally for an assignment we'd be using

-    * the actual storage for the result here, instead.

-    */

-   result_src = get_temp(glsl_type::vec4_type);

-   result_dst = ir_to_mesa_dst_reg_from_src(result_src);

-

-   switch (ir->op) {

-   case ir_tex:

-      opcode = OPCODE_TEX;

-      break;

-   case ir_txb:

-      opcode = OPCODE_TXB;

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

-      lod_info = this->result;

-      break;

-   case ir_txl:

-      opcode = OPCODE_TXL;

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

-      lod_info = this->result;

-      break;

-   case ir_txd:

-   case ir_txf:

-      assert(!"GLSL 1.30 features unsupported");

-      break;

-   }

-

-   if (ir->projector) {

-      if (opcode == OPCODE_TEX) {

-	 /* Slot the projector in as the last component of the coord. */

-	 coord_dst.writemask = WRITEMASK_W;

-	 ir_to_mesa_emit_op1(ir, OPCODE_MOV, coord_dst, projector);

-	 coord_dst.writemask = WRITEMASK_XYZW;

-	 opcode = OPCODE_TXP;

-      } else {

-	 ir_to_mesa_src_reg coord_w = coord;

-	 coord_w.swizzle = SWIZZLE_WWWW;

-

-	 /* For the other TEX opcodes there's no projective version

-	  * since the last slot is taken up by lod info.  Do the

-	  * projective divide now.

-	  */

-	 coord_dst.writemask = WRITEMASK_W;

-	 ir_to_mesa_emit_op1(ir, OPCODE_RCP, coord_dst, projector);

-

-	 coord_dst.writemask = WRITEMASK_XYZ;

-	 ir_to_mesa_emit_op2(ir, OPCODE_MUL, coord_dst, coord, coord_w);

-

-	 coord_dst.writemask = WRITEMASK_XYZW;

-	 coord.swizzle = SWIZZLE_XYZW;

-      }

-   }

-

-   if (ir->shadow_comparitor) {

-      /* Slot the shadow value in as the second to last component of the

-       * coord.

-       */

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

-      coord_dst.writemask = WRITEMASK_Z;

-      ir_to_mesa_emit_op1(ir, OPCODE_MOV, coord_dst, this->result);

-      coord_dst.writemask = WRITEMASK_XYZW;

-   }

-

-   if (opcode == OPCODE_TXL || opcode == OPCODE_TXB) {

-      /* Mesa IR stores lod or lod bias in the last channel of the coords. */

-      coord_dst.writemask = WRITEMASK_W;

-      ir_to_mesa_emit_op1(ir, OPCODE_MOV, coord_dst, lod_info);

-      coord_dst.writemask = WRITEMASK_XYZW;

-   }

-

-   inst = ir_to_mesa_emit_op1(ir, opcode, result_dst, coord);

-

-   if (ir->shadow_comparitor)

-      inst->tex_shadow = GL_TRUE;

-

-   inst->sampler = _mesa_get_sampler_uniform_value(ir->sampler,

-						   this->shader_program,

-						   this->prog);

-

-   const glsl_type *sampler_type = ir->sampler->type;

-

-   switch (sampler_type->sampler_dimensionality) {

-   case GLSL_SAMPLER_DIM_1D:

-      inst->tex_target = (sampler_type->sampler_array)

-	 ? TEXTURE_1D_ARRAY_INDEX : TEXTURE_1D_INDEX;

-      break;

-   case GLSL_SAMPLER_DIM_2D:

-      inst->tex_target = (sampler_type->sampler_array)

-	 ? TEXTURE_2D_ARRAY_INDEX : TEXTURE_2D_INDEX;

-      break;

-   case GLSL_SAMPLER_DIM_3D:

-      inst->tex_target = TEXTURE_3D_INDEX;

-      break;

-   case GLSL_SAMPLER_DIM_CUBE:

-      inst->tex_target = TEXTURE_CUBE_INDEX;

-      break;

-   case GLSL_SAMPLER_DIM_RECT:

-      inst->tex_target = TEXTURE_RECT_INDEX;

-      break;

-   case GLSL_SAMPLER_DIM_BUF:

-      assert(!"FINISHME: Implement ARB_texture_buffer_object");

-      break;

-   default:

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

-   }

-

-   this->result = result_src;

-}

-

-void

-ir_to_mesa_visitor::visit(ir_return *ir)

-{

-   if (ir->get_value()) {

-      ir_to_mesa_dst_reg l;

-      int i;

-

-      assert(current_function);

-

-      ir->get_value()->accept(this);

-      ir_to_mesa_src_reg r = this->result;

-

-      l = ir_to_mesa_dst_reg_from_src(current_function->return_reg);

-

-      for (i = 0; i < type_size(current_function->sig->return_type); i++) {

-	 ir_to_mesa_emit_op1(ir, OPCODE_MOV, l, r);

-	 l.index++;

-	 r.index++;

-      }

-   }

-

-   ir_to_mesa_emit_op0(ir, OPCODE_RET);

-}

-

-void

-ir_to_mesa_visitor::visit(ir_discard *ir)

-{

-   struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog;

-

-   if (ir->condition) {

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

-      this->result.negate = ~this->result.negate;

-      ir_to_mesa_emit_op1(ir, OPCODE_KIL, ir_to_mesa_undef_dst, this->result);

-   } else {

-      ir_to_mesa_emit_op0(ir, OPCODE_KIL_NV);

-   }

-

-   fp->UsesKill = GL_TRUE;

-}

-

-void

-ir_to_mesa_visitor::visit(ir_if *ir)

-{

-   ir_to_mesa_instruction *cond_inst, *if_inst, *else_inst = NULL;

-   ir_to_mesa_instruction *prev_inst;

-

-   prev_inst = (ir_to_mesa_instruction *)this->instructions.get_tail();

-

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

-   assert(this->result.file != PROGRAM_UNDEFINED);

-

-   if (this->options->EmitCondCodes) {

-      cond_inst = (ir_to_mesa_instruction *)this->instructions.get_tail();

-

-      /* See if we actually generated any instruction for generating

-       * the condition.  If not, then cook up a move to a temp so we

-       * have something to set cond_update on.

-       */

-      if (cond_inst == prev_inst) {

-	 ir_to_mesa_src_reg temp = get_temp(glsl_type::bool_type);

-	 cond_inst = ir_to_mesa_emit_op1(ir->condition, OPCODE_MOV,

-					 ir_to_mesa_dst_reg_from_src(temp),

-					 result);

-      }

-      cond_inst->cond_update = GL_TRUE;

-

-      if_inst = ir_to_mesa_emit_op0(ir->condition, OPCODE_IF);

-      if_inst->dst_reg.cond_mask = COND_NE;

-   } else {

-      if_inst = ir_to_mesa_emit_op1(ir->condition,

-				    OPCODE_IF, ir_to_mesa_undef_dst,

-				    this->result);

-   }

-

-   this->instructions.push_tail(if_inst);

-

-   visit_exec_list(&ir->then_instructions, this);

-

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

-      else_inst = ir_to_mesa_emit_op0(ir->condition, OPCODE_ELSE);

-      visit_exec_list(&ir->else_instructions, this);

-   }

-

-   if_inst = ir_to_mesa_emit_op1(ir->condition, OPCODE_ENDIF,

-				 ir_to_mesa_undef_dst, ir_to_mesa_undef);

-}

-

-ir_to_mesa_visitor::ir_to_mesa_visitor()

-{

-   result.file = PROGRAM_UNDEFINED;

-   next_temp = 1;

-   next_signature_id = 1;

-   current_function = NULL;

-   mem_ctx = ralloc_context(NULL);

-}

-

-ir_to_mesa_visitor::~ir_to_mesa_visitor()

-{

-   ralloc_free(mem_ctx);

-}

-

-static struct prog_src_register

-mesa_src_reg_from_ir_src_reg(ir_to_mesa_src_reg reg)

-{

-   struct prog_src_register mesa_reg;

-

-   mesa_reg.File = reg.file;

-   assert(reg.index < (1 << INST_INDEX_BITS));

-   mesa_reg.Index = reg.index;

-   mesa_reg.Swizzle = reg.swizzle;

-   mesa_reg.RelAddr = reg.reladdr != NULL;

-   mesa_reg.Negate = reg.negate;

-   mesa_reg.Abs = 0;

-   mesa_reg.HasIndex2 = GL_FALSE;

-   mesa_reg.RelAddr2 = 0;

-   mesa_reg.Index2 = 0;

-

-   return mesa_reg;

-}

-

-static void

-set_branchtargets(ir_to_mesa_visitor *v,

-		  struct prog_instruction *mesa_instructions,

-		  int num_instructions)

-{

-   int if_count = 0, loop_count = 0;

-   int *if_stack, *loop_stack;

-   int if_stack_pos = 0, loop_stack_pos = 0;

-   int i, j;

-

-   for (i = 0; i < num_instructions; i++) {

-      switch (mesa_instructions[i].Opcode) {

-      case OPCODE_IF:

-	 if_count++;

-	 break;

-      case OPCODE_BGNLOOP:

-	 loop_count++;

-	 break;

-      case OPCODE_BRK:

-      case OPCODE_CONT:

-	 mesa_instructions[i].BranchTarget = -1;

-	 break;

-      default:

-	 break;

-      }

-   }

-

-   if_stack = rzalloc_array(v->mem_ctx, int, if_count);

-   loop_stack = rzalloc_array(v->mem_ctx, int, loop_count);

-

-   for (i = 0; i < num_instructions; i++) {

-      switch (mesa_instructions[i].Opcode) {

-      case OPCODE_IF:

-	 if_stack[if_stack_pos] = i;

-	 if_stack_pos++;

-	 break;

-      case OPCODE_ELSE:

-	 mesa_instructions[if_stack[if_stack_pos - 1]].BranchTarget = i;

-	 if_stack[if_stack_pos - 1] = i;

-	 break;

-      case OPCODE_ENDIF:

-	 mesa_instructions[if_stack[if_stack_pos - 1]].BranchTarget = i;

-	 if_stack_pos--;

-	 break;

-      case OPCODE_BGNLOOP:

-	 loop_stack[loop_stack_pos] = i;

-	 loop_stack_pos++;

-	 break;

-      case OPCODE_ENDLOOP:

-	 loop_stack_pos--;

-	 /* Rewrite any breaks/conts at this nesting level (haven't

-	  * already had a BranchTarget assigned) to point to the end

-	  * of the loop.

-	  */

-	 for (j = loop_stack[loop_stack_pos]; j < i; j++) {

-	    if (mesa_instructions[j].Opcode == OPCODE_BRK ||

-		mesa_instructions[j].Opcode == OPCODE_CONT) {

-	       if (mesa_instructions[j].BranchTarget == -1) {

-		  mesa_instructions[j].BranchTarget = i;

-	       }

-	    }

-	 }

-	 /* The loop ends point at each other. */

-	 mesa_instructions[i].BranchTarget = loop_stack[loop_stack_pos];

-	 mesa_instructions[loop_stack[loop_stack_pos]].BranchTarget = i;

-	 break;

-      case OPCODE_CAL:

-	 foreach_iter(exec_list_iterator, iter, v->function_signatures) {

-	    function_entry *entry = (function_entry *)iter.get();

-

-	    if (entry->sig_id == mesa_instructions[i].BranchTarget) {

-	       mesa_instructions[i].BranchTarget = entry->inst;

-	       break;

-	    }

-	 }

-	 break;

-      default:

-	 break;

-      }

-   }

-}

-

-static void

-print_program(struct prog_instruction *mesa_instructions,

-	      ir_instruction **mesa_instruction_annotation,

-	      int num_instructions)

-{

-   ir_instruction *last_ir = NULL;

-   int i;

-   int indent = 0;

-

-   for (i = 0; i < num_instructions; i++) {

-      struct prog_instruction *mesa_inst = mesa_instructions + i;

-      ir_instruction *ir = mesa_instruction_annotation[i];

-

-      fprintf(stdout, "%3d: ", i);

-

-      if (last_ir != ir && ir) {

-	 int j;

-

-	 for (j = 0; j < indent; j++) {

-	    fprintf(stdout, " ");

-	 }

-	 ir->print();

-	 printf("\n");

-	 last_ir = ir;

-

-	 fprintf(stdout, "     "); /* line number spacing. */

-      }

-

-      indent = _mesa_fprint_instruction_opt(stdout, mesa_inst, indent,

-					    PROG_PRINT_DEBUG, NULL);

-   }

-}

-

-

-/**

- * Count resources used by the given gpu program (number of texture

- * samplers, etc).

- */

-static void

-count_resources(struct gl_program *prog)

-{

-   unsigned int i;

-

-   prog->SamplersUsed = 0;

-

-   for (i = 0; i < prog->NumInstructions; i++) {

-      struct prog_instruction *inst = &prog->Instructions[i];

-

-      if (_mesa_is_tex_instruction(inst->Opcode)) {

-	 prog->SamplerTargets[inst->TexSrcUnit] =

-	    (gl_texture_index)inst->TexSrcTarget;

-	 prog->SamplersUsed |= 1 << inst->TexSrcUnit;

-	 if (inst->TexShadow) {

-	    prog->ShadowSamplers |= 1 << inst->TexSrcUnit;

-	 }

-      }

-   }

-

-   _mesa_update_shader_textures_used(prog);

-}

-

-

-/**

- * Check if the given vertex/fragment/shader program is within the

- * resource limits of the context (number of texture units, etc).

- * If any of those checks fail, record a linker error.

- *

- * XXX more checks are needed...

- */

-static void

-check_resources(const struct gl_context *ctx,

-                struct gl_shader_program *shader_program,

-                struct gl_program *prog)

-{

-   switch (prog->Target) {

-   case GL_VERTEX_PROGRAM_ARB:

-      if (_mesa_bitcount(prog->SamplersUsed) >

-          ctx->Const.MaxVertexTextureImageUnits) {

-         fail_link(shader_program, "Too many vertex shader texture samplers");

-      }

-      if (prog->Parameters->NumParameters > MAX_UNIFORMS) {

-         fail_link(shader_program, "Too many vertex shader constants");

-      }

-      break;

-   case MESA_GEOMETRY_PROGRAM:

-      if (_mesa_bitcount(prog->SamplersUsed) >

-          ctx->Const.MaxGeometryTextureImageUnits) {

-         fail_link(shader_program, "Too many geometry shader texture samplers");

-      }

-      if (prog->Parameters->NumParameters >

-          MAX_GEOMETRY_UNIFORM_COMPONENTS / 4) {

-         fail_link(shader_program, "Too many geometry shader constants");

-      }

-      break;

-   case GL_FRAGMENT_PROGRAM_ARB:

-      if (_mesa_bitcount(prog->SamplersUsed) >

-          ctx->Const.MaxTextureImageUnits) {

-         fail_link(shader_program, "Too many fragment shader texture samplers");

-      }

-      if (prog->Parameters->NumParameters > MAX_UNIFORMS) {

-         fail_link(shader_program, "Too many fragment shader constants");

-      }

-      break;

-   default:

-      _mesa_problem(ctx, "unexpected program type in check_resources()");

-   }

-}

-

-

-

-struct uniform_sort {

-   struct gl_uniform *u;

-   int pos;

-};

-

-/* The shader_program->Uniforms list is almost sorted in increasing

- * uniform->{Frag,Vert}Pos locations, but not quite when there are

- * uniforms shared between targets.  We need to add parameters in

- * increasing order for the targets.

- */

-static int

-sort_uniforms(const void *a, const void *b)

-{

-   struct uniform_sort *u1 = (struct uniform_sort *)a;

-   struct uniform_sort *u2 = (struct uniform_sort *)b;

-

-   return u1->pos - u2->pos;

-}

-

-/* Add the uniforms to the parameters.  The linker chose locations

- * in our parameters lists (which weren't created yet), which the

- * uniforms code will use to poke values into our parameters list

- * when uniforms are updated.

- */

-static void

-add_uniforms_to_parameters_list(struct gl_shader_program *shader_program,

-				struct gl_shader *shader,

-				struct gl_program *prog)

-{

-   unsigned int i;

-   unsigned int next_sampler = 0, num_uniforms = 0;

-   struct uniform_sort *sorted_uniforms;

-

-   sorted_uniforms = ralloc_array(NULL, struct uniform_sort,

-				  shader_program->Uniforms->NumUniforms);

-

-   for (i = 0; i < shader_program->Uniforms->NumUniforms; i++) {

-      struct gl_uniform *uniform = shader_program->Uniforms->Uniforms + i;

-      int parameter_index = -1;

-

-      switch (shader->Type) {

-      case GL_VERTEX_SHADER:

-	 parameter_index = uniform->VertPos;

-	 break;

-      case GL_FRAGMENT_SHADER:

-	 parameter_index = uniform->FragPos;

-	 break;

-      case GL_GEOMETRY_SHADER:

-	 parameter_index = uniform->GeomPos;

-	 break;

-      }

-

-      /* Only add uniforms used in our target. */

-      if (parameter_index != -1) {

-	 sorted_uniforms[num_uniforms].pos = parameter_index;

-	 sorted_uniforms[num_uniforms].u = uniform;

-	 num_uniforms++;

-      }

-   }

-

-   qsort(sorted_uniforms, num_uniforms, sizeof(struct uniform_sort),

-	 sort_uniforms);

-

-   for (i = 0; i < num_uniforms; i++) {

-      struct gl_uniform *uniform = sorted_uniforms[i].u;

-      int parameter_index = sorted_uniforms[i].pos;

-      const glsl_type *type = uniform->Type;

-      unsigned int size;

-

-      if (type->is_vector() ||

-	  type->is_scalar()) {

-	 size = type->vector_elements;

-      } else {

-	 size = type_size(type) * 4;

-      }

-

-      gl_register_file file;

-      if (type->is_sampler() ||

-	  (type->is_array() && type->fields.array->is_sampler())) {

-	 file = PROGRAM_SAMPLER;

-      } else {

-	 file = PROGRAM_UNIFORM;

-      }

-

-      GLint index = _mesa_lookup_parameter_index(prog->Parameters, -1,

-						 uniform->Name);

-

-      if (index < 0) {

-	 index = _mesa_add_parameter(prog->Parameters, file,

-				     uniform->Name, size, type->gl_type,

-				     NULL, NULL, 0x0);

-

-	 /* Sampler uniform values are stored in prog->SamplerUnits,

-	  * and the entry in that array is selected by this index we

-	  * store in ParameterValues[].

-	  */

-	 if (file == PROGRAM_SAMPLER) {

-	    for (unsigned int j = 0; j < size / 4; j++)

-	       prog->Parameters->ParameterValues[index + j][0] = next_sampler++;

-	 }

-

-	 /* The location chosen in the Parameters list here (returned

-	  * from _mesa_add_uniform) has to match what the linker chose.

-	  */

-	 if (index != parameter_index) {

-	    fail_link(shader_program, "Allocation of uniform `%s' to target "

-		      "failed (%d vs %d)\n",

-		      uniform->Name, index, parameter_index);

-	 }

-      }

-   }

-

-   ralloc_free(sorted_uniforms);

-}

-

-static void

-set_uniform_initializer(struct gl_context *ctx, void *mem_ctx,

-			struct gl_shader_program *shader_program,

-			const char *name, const glsl_type *type,

-			ir_constant *val)

-{

-   if (type->is_record()) {

-      ir_constant *field_constant;

-

-      field_constant = (ir_constant *)val->components.get_head();

-

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

-	 const glsl_type *field_type = type->fields.structure[i].type;

-	 const char *field_name = ralloc_asprintf(mem_ctx, "%s.%s", name,

-					    type->fields.structure[i].name);

-	 set_uniform_initializer(ctx, mem_ctx, shader_program, field_name,

-				 field_type, field_constant);

-	 field_constant = (ir_constant *)field_constant->next;

-      }

-      return;

-   }

-

-   int loc = _mesa_get_uniform_location(ctx, shader_program, name);

-

-   if (loc == -1) {

-      fail_link(shader_program,

-		"Couldn't find uniform for initializer %s\n", name);

-      return;

-   }

-

-   for (unsigned int i = 0; i < (type->is_array() ? type->length : 1); i++) {

-      ir_constant *element;

-      const glsl_type *element_type;

-      if (type->is_array()) {

-	 element = val->array_elements[i];

-	 element_type = type->fields.array;

-      } else {

-	 element = val;

-	 element_type = type;

-      }

-

-      void *values;

-

-      if (element_type->base_type == GLSL_TYPE_BOOL) {

-	 int *conv = ralloc_array(mem_ctx, int, element_type->components());

-	 for (unsigned int j = 0; j < element_type->components(); j++) {

-	    conv[j] = element->value.b[j];

-	 }

-	 values = (void *)conv;

-	 element_type = glsl_type::get_instance(GLSL_TYPE_INT,

-						element_type->vector_elements,

-						1);

-      } else {

-	 values = &element->value;

-      }

-

-      if (element_type->is_matrix()) {

-	 _mesa_uniform_matrix(ctx, shader_program,

-			      element_type->matrix_columns,

-			      element_type->vector_elements,

-			      loc, 1, GL_FALSE, (GLfloat *)values);

-	 loc += element_type->matrix_columns;

-      } else {

-	 _mesa_uniform(ctx, shader_program, loc, element_type->matrix_columns,

-		       values, element_type->gl_type);

-	 loc += type_size(element_type);

-      }

-   }

-}

-

-static void

-set_uniform_initializers(struct gl_context *ctx,

-			 struct gl_shader_program *shader_program)

-{

-   void *mem_ctx = NULL;

-

-   for (unsigned int i = 0; i < MESA_SHADER_TYPES; i++) {

-      struct gl_shader *shader = shader_program->_LinkedShaders[i];

-

-      if (shader == NULL)

-	 continue;

-

-      foreach_iter(exec_list_iterator, iter, *shader->ir) {

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

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

-

-	 if (!var || var->mode != ir_var_uniform || !var->constant_value)

-	    continue;

-

-	 if (!mem_ctx)

-	    mem_ctx = ralloc_context(NULL);

-

-	 set_uniform_initializer(ctx, mem_ctx, shader_program, var->name,

-				 var->type, var->constant_value);

-      }

-   }

-

-   ralloc_free(mem_ctx);

-}

-

-/*

- * On a basic block basis, tracks available PROGRAM_TEMPORARY register

- * channels for copy propagation and updates following instructions to

- * use the original versions.

- *

- * The ir_to_mesa_visitor lazily produces code assuming that this pass

- * will occur.  As an example, a TXP production before this pass:

- *

- * 0: MOV TEMP[1], INPUT[4].xyyy;

- * 1: MOV TEMP[1].w, INPUT[4].wwww;

- * 2: TXP TEMP[2], TEMP[1], texture[0], 2D;

- *

- * and after:

- *

- * 0: MOV TEMP[1], INPUT[4].xyyy;

- * 1: MOV TEMP[1].w, INPUT[4].wwww;

- * 2: TXP TEMP[2], INPUT[4].xyyw, texture[0], 2D;

- *

- * which allows for dead code elimination on TEMP[1]'s writes.

- */

-void

-ir_to_mesa_visitor::copy_propagate(void)

-{

-   ir_to_mesa_instruction **acp = rzalloc_array(mem_ctx,

-						    ir_to_mesa_instruction *,

-						    this->next_temp * 4);

-   int *acp_level = rzalloc_array(mem_ctx, int, this->next_temp * 4);

-   int level = 0;

-

-   foreach_iter(exec_list_iterator, iter, this->instructions) {

-      ir_to_mesa_instruction *inst = (ir_to_mesa_instruction *)iter.get();

-

-      assert(inst->dst_reg.file != PROGRAM_TEMPORARY

-	     || inst->dst_reg.index < this->next_temp);

-

-      /* First, do any copy propagation possible into the src regs. */

-      for (int r = 0; r < 3; r++) {

-	 ir_to_mesa_instruction *first = NULL;

-	 bool good = true;

-	 int acp_base = inst->src_reg[r].index * 4;

-

-	 if (inst->src_reg[r].file != PROGRAM_TEMPORARY ||

-	     inst->src_reg[r].reladdr)

-	    continue;

-

-	 /* See if we can find entries in the ACP consisting of MOVs

-	  * from the same src register for all the swizzled channels

-	  * of this src register reference.

-	  */

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

-	    int src_chan = GET_SWZ(inst->src_reg[r].swizzle, i);

-	    ir_to_mesa_instruction *copy_chan = acp[acp_base + src_chan];

-

-	    if (!copy_chan) {

-	       good = false;

-	       break;

-	    }

-

-	    assert(acp_level[acp_base + src_chan] <= level);

-

-	    if (!first) {

-	       first = copy_chan;

-	    } else {

-	       if (first->src_reg[0].file != copy_chan->src_reg[0].file ||

-		   first->src_reg[0].index != copy_chan->src_reg[0].index) {

-		  good = false;

-		  break;

-	       }

-	    }

-	 }

-

-	 if (good) {

-	    /* We've now validated that we can copy-propagate to

-	     * replace this src register reference.  Do it.

-	     */

-	    inst->src_reg[r].file = first->src_reg[0].file;

-	    inst->src_reg[r].index = first->src_reg[0].index;

-

-	    int swizzle = 0;

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

-	       int src_chan = GET_SWZ(inst->src_reg[r].swizzle, i);

-	       ir_to_mesa_instruction *copy_inst = acp[acp_base + src_chan];

-	       swizzle |= (GET_SWZ(copy_inst->src_reg[0].swizzle, src_chan) <<

-			   (3 * i));

-	    }

-	    inst->src_reg[r].swizzle = swizzle;

-	 }

-      }

-

-      switch (inst->op) {

-      case OPCODE_BGNLOOP:

-      case OPCODE_ENDLOOP:

-	 /* End of a basic block, clear the ACP entirely. */

-	 memset(acp, 0, sizeof(*acp) * this->next_temp * 4);

-	 break;

-

-      case OPCODE_IF:

-	 ++level;

-	 break;

-

-      case OPCODE_ENDIF:

-      case OPCODE_ELSE:

-	 /* Clear all channels written inside the block from the ACP, but

-	  * leaving those that were not touched.

-	  */

-	 for (int r = 0; r < this->next_temp; r++) {

-	    for (int c = 0; c < 4; c++) {

-	       if (!acp[4 * r + c])

-		  continue;

-

-	       if (acp_level[4 * r + c] >= level)

-		  acp[4 * r + c] = NULL;

-	    }

-	 }

-	 if (inst->op == OPCODE_ENDIF)

-	    --level;

-	 break;

-

-      default:

-	 /* Continuing the block, clear any written channels from

-	  * the ACP.

-	  */

-	 if (inst->dst_reg.file == PROGRAM_TEMPORARY && inst->dst_reg.reladdr) {

-	    /* Any temporary might be written, so no copy propagation

-	     * across this instruction.

-	     */

-	    memset(acp, 0, sizeof(*acp) * this->next_temp * 4);

-	 } else if (inst->dst_reg.file == PROGRAM_OUTPUT &&

-		    inst->dst_reg.reladdr) {

-	    /* Any output might be written, so no copy propagation

-	     * from outputs across this instruction.

-	     */

-	    for (int r = 0; r < this->next_temp; r++) {

-	       for (int c = 0; c < 4; c++) {

-		  if (!acp[4 * r + c])

-		     continue;

-

-		  if (acp[4 * r + c]->src_reg[0].file == PROGRAM_OUTPUT)

-		     acp[4 * r + c] = NULL;

-	       }

-	    }

-	 } else if (inst->dst_reg.file == PROGRAM_TEMPORARY ||

-		    inst->dst_reg.file == PROGRAM_OUTPUT) {

-	    /* Clear where it's used as dst. */

-	    if (inst->dst_reg.file == PROGRAM_TEMPORARY) {

-	       for (int c = 0; c < 4; c++) {

-		  if (inst->dst_reg.writemask & (1 << c)) {

-		     acp[4 * inst->dst_reg.index + c] = NULL;

-		  }

-	       }

-	    }

-

-	    /* Clear where it's used as src. */

-	    for (int r = 0; r < this->next_temp; r++) {

-	       for (int c = 0; c < 4; c++) {

-		  if (!acp[4 * r + c])

-		     continue;

-

-		  int src_chan = GET_SWZ(acp[4 * r + c]->src_reg[0].swizzle, c);

-

-		  if (acp[4 * r + c]->src_reg[0].file == inst->dst_reg.file &&

-		      acp[4 * r + c]->src_reg[0].index == inst->dst_reg.index &&

-		      inst->dst_reg.writemask & (1 << src_chan))

-		  {

-		     acp[4 * r + c] = NULL;

-		  }

-	       }

-	    }

-	 }

-	 break;

-      }

-

-      /* If this is a copy, add it to the ACP. */

-      if (inst->op == OPCODE_MOV &&

-	  inst->dst_reg.file == PROGRAM_TEMPORARY &&

-	  !inst->dst_reg.reladdr &&

-	  !inst->saturate &&

-	  !inst->src_reg[0].reladdr &&

-	  !inst->src_reg[0].negate) {

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

-	    if (inst->dst_reg.writemask & (1 << i)) {

-	       acp[4 * inst->dst_reg.index + i] = inst;

-	       acp_level[4 * inst->dst_reg.index + i] = level;

-	    }

-	 }

-      }

-   }

-

-   ralloc_free(acp_level);

-   ralloc_free(acp);

-}

-

-

-/**

- * Convert a shader's GLSL IR into a Mesa gl_program.

- */

-static struct gl_program *

-get_mesa_program(struct gl_context *ctx,

-                 struct gl_shader_program *shader_program,

-		 struct gl_shader *shader)

-{

-   ir_to_mesa_visitor v;

-   struct prog_instruction *mesa_instructions, *mesa_inst;

-   ir_instruction **mesa_instruction_annotation;

-   int i;

-   struct gl_program *prog;

-   GLenum target;

-   const char *target_string;

-   GLboolean progress;

-   struct gl_shader_compiler_options *options =

-         &ctx->ShaderCompilerOptions[_mesa_shader_type_to_index(shader->Type)];

-

-   switch (shader->Type) {

-   case GL_VERTEX_SHADER:

-      target = GL_VERTEX_PROGRAM_ARB;

-      target_string = "vertex";

-      break;

-   case GL_FRAGMENT_SHADER:

-      target = GL_FRAGMENT_PROGRAM_ARB;

-      target_string = "fragment";

-      break;

-   case GL_GEOMETRY_SHADER:

-      target = GL_GEOMETRY_PROGRAM_NV;

-      target_string = "geometry";

-      break;

-   default:

-      assert(!"should not be reached");

-      return NULL;

-   }

-

-   validate_ir_tree(shader->ir);

-

-   prog = ctx->Driver.NewProgram(ctx, target, shader_program->Name);

-   if (!prog)

-      return NULL;

-   prog->Parameters = _mesa_new_parameter_list();

-   prog->Varying = _mesa_new_parameter_list();

-   prog->Attributes = _mesa_new_parameter_list();

-   v.ctx = ctx;

-   v.prog = prog;

-   v.shader_program = shader_program;

-   v.options = options;

-

-   add_uniforms_to_parameters_list(shader_program, shader, prog);

-

-   /* Emit Mesa IR for main(). */

-   visit_exec_list(shader->ir, &v);

-   v.ir_to_mesa_emit_op0(NULL, OPCODE_END);

-

-   /* Now emit bodies for any functions that were used. */

-   do {

-      progress = GL_FALSE;

-

-      foreach_iter(exec_list_iterator, iter, v.function_signatures) {

-	 function_entry *entry = (function_entry *)iter.get();

-

-	 if (!entry->bgn_inst) {

-	    v.current_function = entry;

-

-	    entry->bgn_inst = v.ir_to_mesa_emit_op0(NULL, OPCODE_BGNSUB);

-	    entry->bgn_inst->function = entry;

-

-	    visit_exec_list(&entry->sig->body, &v);

-

-	    ir_to_mesa_instruction *last;

-	    last = (ir_to_mesa_instruction *)v.instructions.get_tail();

-	    if (last->op != OPCODE_RET)

-	       v.ir_to_mesa_emit_op0(NULL, OPCODE_RET);

-

-	    ir_to_mesa_instruction *end;

-	    end = v.ir_to_mesa_emit_op0(NULL, OPCODE_ENDSUB);

-	    end->function = entry;

-

-	    progress = GL_TRUE;

-	 }

-      }

-   } while (progress);

-

-   prog->NumTemporaries = v.next_temp;

-

-   int num_instructions = 0;

-   foreach_iter(exec_list_iterator, iter, v.instructions) {

-      num_instructions++;

-   }

-

-   mesa_instructions =

-      (struct prog_instruction *)calloc(num_instructions,

-					sizeof(*mesa_instructions));

-   mesa_instruction_annotation = ralloc_array(v.mem_ctx, ir_instruction *,

-					      num_instructions);

-

-   v.copy_propagate();

-

-   /* Convert ir_mesa_instructions into prog_instructions.

-    */

-   mesa_inst = mesa_instructions;

-   i = 0;

-   foreach_iter(exec_list_iterator, iter, v.instructions) {

-      const ir_to_mesa_instruction *inst = (ir_to_mesa_instruction *)iter.get();

-

-      mesa_inst->Opcode = inst->op;

-      mesa_inst->CondUpdate = inst->cond_update;

-      if (inst->saturate)

-	 mesa_inst->SaturateMode = SATURATE_ZERO_ONE;

-      mesa_inst->DstReg.File = inst->dst_reg.file;

-      mesa_inst->DstReg.Index = inst->dst_reg.index;

-      mesa_inst->DstReg.CondMask = inst->dst_reg.cond_mask;

-      mesa_inst->DstReg.WriteMask = inst->dst_reg.writemask;

-      mesa_inst->DstReg.RelAddr = inst->dst_reg.reladdr != NULL;

-      mesa_inst->SrcReg[0] = mesa_src_reg_from_ir_src_reg(inst->src_reg[0]);

-      mesa_inst->SrcReg[1] = mesa_src_reg_from_ir_src_reg(inst->src_reg[1]);

-      mesa_inst->SrcReg[2] = mesa_src_reg_from_ir_src_reg(inst->src_reg[2]);

-      mesa_inst->TexSrcUnit = inst->sampler;

-      mesa_inst->TexSrcTarget = inst->tex_target;

-      mesa_inst->TexShadow = inst->tex_shadow;

-      mesa_instruction_annotation[i] = inst->ir;

-

-      /* Set IndirectRegisterFiles. */

-      if (mesa_inst->DstReg.RelAddr)

-         prog->IndirectRegisterFiles |= 1 << mesa_inst->DstReg.File;

-

-      /* Update program's bitmask of indirectly accessed register files */

-      for (unsigned src = 0; src < 3; src++)

-         if (mesa_inst->SrcReg[src].RelAddr)

-            prog->IndirectRegisterFiles |= 1 << mesa_inst->SrcReg[src].File;

-

-      if (options->EmitNoIfs && mesa_inst->Opcode == OPCODE_IF) {

-	 fail_link(shader_program, "Couldn't flatten if statement\n");

-      }

-

-      switch (mesa_inst->Opcode) {

-      case OPCODE_BGNSUB:

-	 inst->function->inst = i;

-	 mesa_inst->Comment = strdup(inst->function->sig->function_name());

-	 break;

-      case OPCODE_ENDSUB:

-	 mesa_inst->Comment = strdup(inst->function->sig->function_name());

-	 break;

-      case OPCODE_CAL:

-	 mesa_inst->BranchTarget = inst->function->sig_id; /* rewritten later */

-	 break;

-      case OPCODE_ARL:

-	 prog->NumAddressRegs = 1;

-	 break;

-      default:

-	 break;

-      }

-

-      mesa_inst++;

-      i++;

-

-      if (!shader_program->LinkStatus)

-         break;

-   }

-

-   if (!shader_program->LinkStatus) {

-      free(mesa_instructions);

-      _mesa_reference_program(ctx, &shader->Program, NULL);

-      return NULL;

-   }

-

-   set_branchtargets(&v, mesa_instructions, num_instructions);

-

-   if (ctx->Shader.Flags & GLSL_DUMP) {

-      printf("\n");

-      printf("GLSL IR for linked %s program %d:\n", target_string,

-	     shader_program->Name);

-      _mesa_print_ir(shader->ir, NULL);

-      printf("\n");

-      printf("\n");

-      printf("Mesa IR for linked %s program %d:\n", target_string,

-	     shader_program->Name);

-      print_program(mesa_instructions, mesa_instruction_annotation,

-		    num_instructions);

-   }

-

-   prog->Instructions = mesa_instructions;

-   prog->NumInstructions = num_instructions;

-

-   do_set_program_inouts(shader->ir, prog);

-   count_resources(prog);

-

-   check_resources(ctx, shader_program, prog);

-

-   _mesa_reference_program(ctx, &shader->Program, prog);

-

-   if ((ctx->Shader.Flags & GLSL_NO_OPT) == 0) {

-      _mesa_optimize_program(ctx, prog);

-   }

-

-   return prog;

-}

-

-extern "C" {

-

-/**

- * Link a shader.

- * Called via ctx->Driver.LinkShader()

- * This actually involves converting GLSL IR into Mesa gl_programs with

- * code lowering and other optimizations.

- */

-GLboolean

-_mesa_ir_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)

-{

-   assert(prog->LinkStatus);

-

-   for (unsigned i = 0; i < MESA_SHADER_TYPES; i++) {

-      if (prog->_LinkedShaders[i] == NULL)

-	 continue;

-

-      bool progress;

-      exec_list *ir = prog->_LinkedShaders[i]->ir;

-      const struct gl_shader_compiler_options *options =

-            &ctx->ShaderCompilerOptions[_mesa_shader_type_to_index(prog->_LinkedShaders[i]->Type)];

-

-      do {

-	 progress = false;

-

-	 /* Lowering */

-	 do_mat_op_to_vec(ir);

-	 lower_instructions(ir, (MOD_TO_FRACT | DIV_TO_MUL_RCP | EXP_TO_EXP2

-				 | LOG_TO_LOG2

-				 | ((options->EmitNoPow) ? POW_TO_EXP2 : 0)));

-

-	 progress = do_lower_jumps(ir, true, true, options->EmitNoMainReturn, options->EmitNoCont, options->EmitNoLoops) || progress;

-

-	 progress = do_common_optimization(ir, true, options->MaxUnrollIterations) || progress;

-

-	 progress = lower_quadop_vector(ir, true) || progress;

-

-	 if (options->EmitNoIfs) {

-	    progress = lower_discard(ir) || progress;

-	    progress = lower_if_to_cond_assign(ir) || progress;

-	 }

-

-	 if (options->EmitNoNoise)

-	    progress = lower_noise(ir) || progress;

-

-	 /* If there are forms of indirect addressing that the driver

-	  * cannot handle, perform the lowering pass.

-	  */

-	 if (options->EmitNoIndirectInput || options->EmitNoIndirectOutput

-	     || options->EmitNoIndirectTemp || options->EmitNoIndirectUniform)

-	   progress =

-	     lower_variable_index_to_cond_assign(ir,

-						 options->EmitNoIndirectInput,

-						 options->EmitNoIndirectOutput,

-						 options->EmitNoIndirectTemp,

-						 options->EmitNoIndirectUniform)

-	     || progress;

-

-	 progress = do_vec_index_to_cond_assign(ir) || progress;

-      } while (progress);

-

-      validate_ir_tree(ir);

-   }

-

-   for (unsigned i = 0; i < MESA_SHADER_TYPES; i++) {

-      struct gl_program *linked_prog;

-

-      if (prog->_LinkedShaders[i] == NULL)

-	 continue;

-

-      linked_prog = get_mesa_program(ctx, prog, prog->_LinkedShaders[i]);

-

-      if (linked_prog) {

-         bool ok = true;

-

-         switch (prog->_LinkedShaders[i]->Type) {

-         case GL_VERTEX_SHADER:

-            _mesa_reference_vertprog(ctx, &prog->VertexProgram,

-                                     (struct gl_vertex_program *)linked_prog);

-            ok = ctx->Driver.ProgramStringNotify(ctx, GL_VERTEX_PROGRAM_ARB,

-                                                 linked_prog);

-            break;

-         case GL_FRAGMENT_SHADER:

-            _mesa_reference_fragprog(ctx, &prog->FragmentProgram,

-                                     (struct gl_fragment_program *)linked_prog);

-            ok = ctx->Driver.ProgramStringNotify(ctx, GL_FRAGMENT_PROGRAM_ARB,

-                                                 linked_prog);

-            break;

-         case GL_GEOMETRY_SHADER:

-            _mesa_reference_geomprog(ctx, &prog->GeometryProgram,

-                                     (struct gl_geometry_program *)linked_prog);

-            ok = ctx->Driver.ProgramStringNotify(ctx, GL_GEOMETRY_PROGRAM_NV,

-                                                 linked_prog);

-            break;

-         }

-         if (!ok) {

-            return GL_FALSE;

-         }

-      }

-

-      _mesa_reference_program(ctx, &linked_prog, NULL);

-   }

-

-   return GL_TRUE;

-}

-

-

-/**

- * Compile a GLSL shader.  Called via glCompileShader().

- */

-void

-_mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader)

-{

-   struct _mesa_glsl_parse_state *state =

-      new(shader) _mesa_glsl_parse_state(ctx, shader->Type, shader);

-

-   const char *source = shader->Source;

-   /* Check if the user called glCompileShader without first calling

-    * glShaderSource.  This should fail to compile, but not raise a GL_ERROR.

-    */

-   if (source == NULL) {

-      shader->CompileStatus = GL_FALSE;

-      return;

-   }

-

-   state->error = preprocess(state, &source, &state->info_log,

-			     &ctx->Extensions, ctx->API);

-

-   if (ctx->Shader.Flags & GLSL_DUMP) {

-      printf("GLSL source for shader %d:\n", shader->Name);

-      printf("%s\n", shader->Source);

-   }

-

-   if (!state->error) {

-     _mesa_glsl_lexer_ctor(state, source);

-     _mesa_glsl_parse(state);

-     _mesa_glsl_lexer_dtor(state);

-   }

-

-   ralloc_free(shader->ir);

-   shader->ir = new(shader) exec_list;

-   if (!state->error && !state->translation_unit.is_empty())

-      _mesa_ast_to_hir(shader->ir, state);

-

-   if (!state->error && !shader->ir->is_empty()) {

-      validate_ir_tree(shader->ir);

-

-      /* Do some optimization at compile time to reduce shader IR size

-       * and reduce later work if the same shader is linked multiple times

-       */

-      while (do_common_optimization(shader->ir, false, 32))

-	 ;

-

-      validate_ir_tree(shader->ir);

-   }

-

-   shader->symbols = state->symbols;

-

-   shader->CompileStatus = !state->error;

-   shader->InfoLog = state->info_log;

-   shader->Version = state->language_version;

-   memcpy(shader->builtins_to_link, state->builtins_to_link,

-	  sizeof(shader->builtins_to_link[0]) * state->num_builtins_to_link);

-   shader->num_builtins_to_link = state->num_builtins_to_link;

-

-   if (ctx->Shader.Flags & GLSL_LOG) {

-      _mesa_write_shader_to_file(shader);

-   }

-

-   if (ctx->Shader.Flags & GLSL_DUMP) {

-      if (shader->CompileStatus) {

-	 printf("GLSL IR for shader %d:\n", shader->Name);

-	 _mesa_print_ir(shader->ir, NULL);

-	 printf("\n\n");

-      } else {

-	 printf("GLSL shader %d failed to compile.\n", shader->Name);

-      }

-      if (shader->InfoLog && shader->InfoLog[0] != 0) {

-	 printf("GLSL shader %d info log:\n", shader->Name);

-	 printf("%s\n", shader->InfoLog);

-      }

-   }

-

-   /* Retain any live IR, but trash the rest. */

-   reparent_ir(shader->ir, shader->ir);

-

-   ralloc_free(state);

-}

-

-

-/**

- * Link a GLSL shader program.  Called via glLinkProgram().

- */

-void

-_mesa_glsl_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)

-{

-   unsigned int i;

-

-   _mesa_clear_shader_program_data(ctx, prog);

-

-   prog->LinkStatus = GL_TRUE;

-

-   for (i = 0; i < prog->NumShaders; i++) {

-      if (!prog->Shaders[i]->CompileStatus) {

-	 fail_link(prog, "linking with uncompiled shader");

-	 prog->LinkStatus = GL_FALSE;

-      }

-   }

-

-   prog->Varying = _mesa_new_parameter_list();

-   _mesa_reference_vertprog(ctx, &prog->VertexProgram, NULL);

-   _mesa_reference_fragprog(ctx, &prog->FragmentProgram, NULL);

-   _mesa_reference_geomprog(ctx, &prog->GeometryProgram, NULL);

-

-   if (prog->LinkStatus) {

-      link_shaders(ctx, prog);

-   }

-

-   if (prog->LinkStatus) {

-      if (!ctx->Driver.LinkShader(ctx, prog)) {

-	 prog->LinkStatus = GL_FALSE;

-      }

-   }

-

-   set_uniform_initializers(ctx, prog);

-

-   if (ctx->Shader.Flags & GLSL_DUMP) {

-      if (!prog->LinkStatus) {

-	 printf("GLSL shader program %d failed to link\n", prog->Name);

-      }

-

-      if (prog->InfoLog && prog->InfoLog[0] != 0) {

-	 printf("GLSL shader program %d info log:\n", prog->Name);

-	 printf("%s\n", prog->InfoLog);

-      }

-   }

-}

-

-} /* extern "C" */

+/*
+ * Copyright (C) 2005-2007  Brian Paul   All Rights Reserved.
+ * Copyright (C) 2008  VMware, Inc.   All Rights Reserved.
+ * Copyright © 2010 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file ir_to_mesa.cpp
+ *
+ * Translate GLSL IR to Mesa's gl_program representation.
+ */
+
+#include <stdio.h>
+#include "main/compiler.h"
+#include "ir.h"
+#include "ir_visitor.h"
+#include "ir_print_visitor.h"
+#include "ir_expression_flattening.h"
+#include "glsl_types.h"
+#include "glsl_parser_extras.h"
+#include "../glsl/program.h"
+#include "ir_optimization.h"
+#include "ast.h"
+
+extern "C" {
+#include "main/mtypes.h"
+#include "main/shaderapi.h"
+#include "main/shaderobj.h"
+#include "main/uniforms.h"
+#include "program/hash_table.h"
+#include "program/prog_instruction.h"
+#include "program/prog_optimize.h"
+#include "program/prog_print.h"
+#include "program/program.h"
+#include "program/prog_uniform.h"
+#include "program/prog_parameter.h"
+#include "program/sampler.h"
+}
+
+static int swizzle_for_size(int size);
+
+/**
+ * This struct is a corresponding struct to Mesa prog_src_register, with
+ * wider fields.
+ */
+typedef struct ir_to_mesa_src_reg {
+   ir_to_mesa_src_reg(int file, int index, const glsl_type *type)
+   {
+      this->file = (gl_register_file) file;
+      this->index = index;
+      if (type && (type->is_scalar() || type->is_vector() || type->is_matrix()))
+	 this->swizzle = swizzle_for_size(type->vector_elements);
+      else
+	 this->swizzle = SWIZZLE_XYZW;
+      this->negate = 0;
+      this->reladdr = NULL;
+   }
+
+   ir_to_mesa_src_reg()
+   {
+      this->file = PROGRAM_UNDEFINED;
+      this->index = 0;
+      this->swizzle = 0;
+      this->negate = 0;
+      this->reladdr = NULL;
+   }
+
+   gl_register_file file; /**< PROGRAM_* from Mesa */
+   int index; /**< temporary index, VERT_ATTRIB_*, FRAG_ATTRIB_*, etc. */
+   GLuint swizzle; /**< SWIZZLE_XYZWONEZERO swizzles from Mesa. */
+   int negate; /**< NEGATE_XYZW mask from mesa */
+   /** Register index should be offset by the integer in this reg. */
+   ir_to_mesa_src_reg *reladdr;
+} ir_to_mesa_src_reg;
+
+typedef struct ir_to_mesa_dst_reg {
+   int file; /**< PROGRAM_* from Mesa */
+   int index; /**< temporary index, VERT_ATTRIB_*, FRAG_ATTRIB_*, etc. */
+   int writemask; /**< Bitfield of WRITEMASK_[XYZW] */
+   GLuint cond_mask:4;
+   /** Register index should be offset by the integer in this reg. */
+   ir_to_mesa_src_reg *reladdr;
+} ir_to_mesa_dst_reg;
+
+extern ir_to_mesa_src_reg ir_to_mesa_undef;
+
+class ir_to_mesa_instruction : public exec_node {
+public:
+   /* Callers of this ralloc-based new need not call delete. It's
+    * easier to just ralloc_free 'ctx' (or any of its ancestors). */
+   static void* operator new(size_t size, void *ctx)
+   {
+      void *node;
+
+      node = rzalloc_size(ctx, size);
+      assert(node != NULL);
+
+      return node;
+   }
+
+   enum prog_opcode op;
+   ir_to_mesa_dst_reg dst_reg;
+   ir_to_mesa_src_reg src_reg[3];
+   /** Pointer to the ir source this tree came from for debugging */
+   ir_instruction *ir;
+   GLboolean cond_update;
+   bool saturate;
+   int sampler; /**< sampler index */
+   int tex_target; /**< One of TEXTURE_*_INDEX */
+   GLboolean tex_shadow;
+
+   class function_entry *function; /* Set on OPCODE_CAL or OPCODE_BGNSUB */
+};
+
+class variable_storage : public exec_node {
+public:
+   variable_storage(ir_variable *var, gl_register_file file, int index)
+      : file(file), index(index), var(var)
+   {
+      /* empty */
+   }
+
+   gl_register_file file;
+   int index;
+   ir_variable *var; /* variable that maps to this, if any */
+};
+
+class function_entry : public exec_node {
+public:
+   ir_function_signature *sig;
+
+   /**
+    * identifier of this function signature used by the program.
+    *
+    * At the point that Mesa instructions for function calls are
+    * generated, we don't know the address of the first instruction of
+    * the function body.  So we make the BranchTarget that is called a
+    * small integer and rewrite them during set_branchtargets().
+    */
+   int sig_id;
+
+   /**
+    * Pointer to first instruction of the function body.
+    *
+    * Set during function body emits after main() is processed.
+    */
+   ir_to_mesa_instruction *bgn_inst;
+
+   /**
+    * Index of the first instruction of the function body in actual
+    * Mesa IR.
+    *
+    * Set after convertion from ir_to_mesa_instruction to prog_instruction.
+    */
+   int inst;
+
+   /** Storage for the return value. */
+   ir_to_mesa_src_reg return_reg;
+};
+
+class ir_to_mesa_visitor : public ir_visitor {
+public:
+   ir_to_mesa_visitor();
+   ~ir_to_mesa_visitor();
+
+   function_entry *current_function;
+
+   struct gl_context *ctx;
+   struct gl_program *prog;
+   struct gl_shader_program *shader_program;
+   struct gl_shader_compiler_options *options;
+
+   int next_temp;
+
+   variable_storage *find_variable_storage(ir_variable *var);
+
+   function_entry *get_function_signature(ir_function_signature *sig);
+
+   ir_to_mesa_src_reg get_temp(const glsl_type *type);
+   void reladdr_to_temp(ir_instruction *ir,
+			ir_to_mesa_src_reg *reg, int *num_reladdr);
+
+   struct ir_to_mesa_src_reg src_reg_for_float(float val);
+
+   /**
+    * \name Visit methods
+    *
+    * As typical for the visitor pattern, there must be one \c visit method for
+    * each concrete subclass of \c ir_instruction.  Virtual base classes within
+    * the hierarchy should not have \c visit methods.
+    */
+   /*@{*/
+   virtual void visit(ir_variable *);
+   virtual void visit(ir_loop *);
+   virtual void visit(ir_loop_jump *);
+   virtual void visit(ir_function_signature *);
+   virtual void visit(ir_function *);
+   virtual void visit(ir_expression *);
+   virtual void visit(ir_swizzle *);
+   virtual void visit(ir_dereference_variable  *);
+   virtual void visit(ir_dereference_array *);
+   virtual void visit(ir_dereference_record *);
+   virtual void visit(ir_assignment *);
+   virtual void visit(ir_constant *);
+   virtual void visit(ir_call *);
+   virtual void visit(ir_return *);
+   virtual void visit(ir_discard *);
+   virtual void visit(ir_texture *);
+   virtual void visit(ir_if *);
+   /*@}*/
+
+   struct ir_to_mesa_src_reg result;
+
+   /** List of variable_storage */
+   exec_list variables;
+
+   /** List of function_entry */
+   exec_list function_signatures;
+   int next_signature_id;
+
+   /** List of ir_to_mesa_instruction */
+   exec_list instructions;
+
+   ir_to_mesa_instruction *ir_to_mesa_emit_op0(ir_instruction *ir,
+					       enum prog_opcode op);
+
+   ir_to_mesa_instruction *ir_to_mesa_emit_op1(ir_instruction *ir,
+					       enum prog_opcode op,
+					       ir_to_mesa_dst_reg dst,
+					       ir_to_mesa_src_reg src0);
+
+   ir_to_mesa_instruction *ir_to_mesa_emit_op2(ir_instruction *ir,
+					       enum prog_opcode op,
+					       ir_to_mesa_dst_reg dst,
+					       ir_to_mesa_src_reg src0,
+					       ir_to_mesa_src_reg src1);
+
+   ir_to_mesa_instruction *ir_to_mesa_emit_op3(ir_instruction *ir,
+					       enum prog_opcode op,
+					       ir_to_mesa_dst_reg dst,
+					       ir_to_mesa_src_reg src0,
+					       ir_to_mesa_src_reg src1,
+					       ir_to_mesa_src_reg src2);
+
+   /**
+    * Emit the correct dot-product instruction for the type of arguments
+    *
+    * \sa ir_to_mesa_emit_op2
+    */
+   void ir_to_mesa_emit_dp(ir_instruction *ir,
+			   ir_to_mesa_dst_reg dst,
+			   ir_to_mesa_src_reg src0,
+			   ir_to_mesa_src_reg src1,
+			   unsigned elements);
+
+   void ir_to_mesa_emit_scalar_op1(ir_instruction *ir,
+				   enum prog_opcode op,
+				   ir_to_mesa_dst_reg dst,
+				   ir_to_mesa_src_reg src0);
+
+   void ir_to_mesa_emit_scalar_op2(ir_instruction *ir,
+				   enum prog_opcode op,
+				   ir_to_mesa_dst_reg dst,
+				   ir_to_mesa_src_reg src0,
+				   ir_to_mesa_src_reg src1);
+
+   void emit_scs(ir_instruction *ir, enum prog_opcode op,
+		 ir_to_mesa_dst_reg dst,
+		 const ir_to_mesa_src_reg &src);
+
+   GLboolean try_emit_mad(ir_expression *ir,
+			  int mul_operand);
+   GLboolean try_emit_sat(ir_expression *ir);
+
+   void emit_swz(ir_expression *ir);
+
+   bool process_move_condition(ir_rvalue *ir);
+
+   void copy_propagate(void);
+
+   void *mem_ctx;
+};
+
+ir_to_mesa_src_reg ir_to_mesa_undef = ir_to_mesa_src_reg(PROGRAM_UNDEFINED, 0, NULL);
+
+ir_to_mesa_dst_reg ir_to_mesa_undef_dst = {
+   PROGRAM_UNDEFINED, 0, SWIZZLE_NOOP, COND_TR, NULL,
+};
+
+ir_to_mesa_dst_reg ir_to_mesa_address_reg = {
+   PROGRAM_ADDRESS, 0, WRITEMASK_X, COND_TR, NULL
+};
+
+static void
+fail_link(struct gl_shader_program *prog, const char *fmt, ...) PRINTFLIKE(2, 3);
+
+static void
+fail_link(struct gl_shader_program *prog, const char *fmt, ...)
+{
+   va_list args;
+   va_start(args, fmt);
+   ralloc_vasprintf_append(&prog->InfoLog, fmt, args);
+   va_end(args);
+
+   prog->LinkStatus = GL_FALSE;
+}
+
+static int
+swizzle_for_size(int size)
+{
+   int size_swizzles[4] = {
+      MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X, SWIZZLE_X, SWIZZLE_X),
+      MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Y, SWIZZLE_Y),
+      MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z),
+      MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_W),
+   };
+
+   assert((size >= 1) && (size <= 4));
+   return size_swizzles[size - 1];
+}
+
+ir_to_mesa_instruction *
+ir_to_mesa_visitor::ir_to_mesa_emit_op3(ir_instruction *ir,
+					enum prog_opcode op,
+					ir_to_mesa_dst_reg dst,
+					ir_to_mesa_src_reg src0,
+					ir_to_mesa_src_reg src1,
+					ir_to_mesa_src_reg src2)
+{
+   ir_to_mesa_instruction *inst = new(mem_ctx) ir_to_mesa_instruction();
+   int num_reladdr = 0;
+
+   /* If we have to do relative addressing, we want to load the ARL
+    * reg directly for one of the regs, and preload the other reladdr
+    * sources into temps.
+    */
+   num_reladdr += dst.reladdr != NULL;
+   num_reladdr += src0.reladdr != NULL;
+   num_reladdr += src1.reladdr != NULL;
+   num_reladdr += src2.reladdr != NULL;
+
+   reladdr_to_temp(ir, &src2, &num_reladdr);
+   reladdr_to_temp(ir, &src1, &num_reladdr);
+   reladdr_to_temp(ir, &src0, &num_reladdr);
+
+   if (dst.reladdr) {
+      ir_to_mesa_emit_op1(ir, OPCODE_ARL, ir_to_mesa_address_reg,
+                          *dst.reladdr);
+
+      num_reladdr--;
+   }
+   assert(num_reladdr == 0);
+
+   inst->op = op;
+   inst->dst_reg = dst;
+   inst->src_reg[0] = src0;
+   inst->src_reg[1] = src1;
+   inst->src_reg[2] = src2;
+   inst->ir = ir;
+
+   inst->function = NULL;
+
+   this->instructions.push_tail(inst);
+
+   return inst;
+}
+
+
+ir_to_mesa_instruction *
+ir_to_mesa_visitor::ir_to_mesa_emit_op2(ir_instruction *ir,
+					enum prog_opcode op,
+					ir_to_mesa_dst_reg dst,
+					ir_to_mesa_src_reg src0,
+					ir_to_mesa_src_reg src1)
+{
+   return ir_to_mesa_emit_op3(ir, op, dst, src0, src1, ir_to_mesa_undef);
+}
+
+ir_to_mesa_instruction *
+ir_to_mesa_visitor::ir_to_mesa_emit_op1(ir_instruction *ir,
+					enum prog_opcode op,
+					ir_to_mesa_dst_reg dst,
+					ir_to_mesa_src_reg src0)
+{
+   assert(dst.writemask != 0);
+   return ir_to_mesa_emit_op3(ir, op, dst,
+			      src0, ir_to_mesa_undef, ir_to_mesa_undef);
+}
+
+ir_to_mesa_instruction *
+ir_to_mesa_visitor::ir_to_mesa_emit_op0(ir_instruction *ir,
+					enum prog_opcode op)
+{
+   return ir_to_mesa_emit_op3(ir, op, ir_to_mesa_undef_dst,
+			      ir_to_mesa_undef,
+			      ir_to_mesa_undef,
+			      ir_to_mesa_undef);
+}
+
+void
+ir_to_mesa_visitor::ir_to_mesa_emit_dp(ir_instruction *ir,
+				       ir_to_mesa_dst_reg dst,
+				       ir_to_mesa_src_reg src0,
+				       ir_to_mesa_src_reg src1,
+				       unsigned elements)
+{
+   static const gl_inst_opcode dot_opcodes[] = {
+      OPCODE_DP2, OPCODE_DP3, OPCODE_DP4
+   };
+
+   ir_to_mesa_emit_op3(ir, dot_opcodes[elements - 2],
+		       dst, src0, src1, ir_to_mesa_undef);
+}
+
+inline ir_to_mesa_dst_reg
+ir_to_mesa_dst_reg_from_src(ir_to_mesa_src_reg reg)
+{
+   ir_to_mesa_dst_reg dst_reg;
+
+   dst_reg.file = reg.file;
+   dst_reg.index = reg.index;
+   dst_reg.writemask = WRITEMASK_XYZW;
+   dst_reg.cond_mask = COND_TR;
+   dst_reg.reladdr = reg.reladdr;
+
+   return dst_reg;
+}
+
+inline ir_to_mesa_src_reg
+ir_to_mesa_src_reg_from_dst(ir_to_mesa_dst_reg reg)
+{
+   return ir_to_mesa_src_reg(reg.file, reg.index, NULL);
+}
+
+/**
+ * Emits Mesa scalar opcodes to produce unique answers across channels.
+ *
+ * Some Mesa opcodes are scalar-only, like ARB_fp/vp.  The src X
+ * channel determines the result across all channels.  So to do a vec4
+ * of this operation, we want to emit a scalar per source channel used
+ * to produce dest channels.
+ */
+void
+ir_to_mesa_visitor::ir_to_mesa_emit_scalar_op2(ir_instruction *ir,
+					       enum prog_opcode op,
+					       ir_to_mesa_dst_reg dst,
+					       ir_to_mesa_src_reg orig_src0,
+					       ir_to_mesa_src_reg orig_src1)
+{
+   int i, j;
+   int done_mask = ~dst.writemask;
+
+   /* Mesa RCP is a scalar operation splatting results to all channels,
+    * like ARB_fp/vp.  So emit as many RCPs as necessary to cover our
+    * dst channels.
+    */
+   for (i = 0; i < 4; i++) {
+      GLuint this_mask = (1 << i);
+      ir_to_mesa_instruction *inst;
+      ir_to_mesa_src_reg src0 = orig_src0;
+      ir_to_mesa_src_reg src1 = orig_src1;
+
+      if (done_mask & this_mask)
+	 continue;
+
+      GLuint src0_swiz = GET_SWZ(src0.swizzle, i);
+      GLuint src1_swiz = GET_SWZ(src1.swizzle, i);
+      for (j = i + 1; j < 4; j++) {
+	 /* If there is another enabled component in the destination that is
+	  * derived from the same inputs, generate its value on this pass as
+	  * well.
+	  */
+	 if (!(done_mask & (1 << j)) &&
+	     GET_SWZ(src0.swizzle, j) == src0_swiz &&
+	     GET_SWZ(src1.swizzle, j) == src1_swiz) {
+	    this_mask |= (1 << j);
+	 }
+      }
+      src0.swizzle = MAKE_SWIZZLE4(src0_swiz, src0_swiz,
+				   src0_swiz, src0_swiz);
+      src1.swizzle = MAKE_SWIZZLE4(src1_swiz, src1_swiz,
+				  src1_swiz, src1_swiz);
+
+      inst = ir_to_mesa_emit_op2(ir, op,
+				 dst,
+				 src0,
+				 src1);
+      inst->dst_reg.writemask = this_mask;
+      done_mask |= this_mask;
+   }
+}
+
+void
+ir_to_mesa_visitor::ir_to_mesa_emit_scalar_op1(ir_instruction *ir,
+					       enum prog_opcode op,
+					       ir_to_mesa_dst_reg dst,
+					       ir_to_mesa_src_reg src0)
+{
+   ir_to_mesa_src_reg undef = ir_to_mesa_undef;
+
+   undef.swizzle = SWIZZLE_XXXX;
+
+   ir_to_mesa_emit_scalar_op2(ir, op, dst, src0, undef);
+}
+
+/**
+ * Emit an OPCODE_SCS instruction
+ *
+ * The \c SCS opcode functions a bit differently than the other Mesa (or
+ * ARB_fragment_program) opcodes.  Instead of splatting its result across all
+ * four components of the destination, it writes one value to the \c x
+ * component and another value to the \c y component.
+ *
+ * \param ir        IR instruction being processed
+ * \param op        Either \c OPCODE_SIN or \c OPCODE_COS depending on which
+ *                  value is desired.
+ * \param dst       Destination register
+ * \param src       Source register
+ */
+void
+ir_to_mesa_visitor::emit_scs(ir_instruction *ir, enum prog_opcode op,
+			     ir_to_mesa_dst_reg dst,
+			     const ir_to_mesa_src_reg &src)
+{
+   /* Vertex programs cannot use the SCS opcode.
+    */
+   if (this->prog->Target == GL_VERTEX_PROGRAM_ARB) {
+      ir_to_mesa_emit_scalar_op1(ir, op, dst, src);
+      return;
+   }
+
+   const unsigned component = (op == OPCODE_SIN) ? 0 : 1;
+   const unsigned scs_mask = (1U << component);
+   int done_mask = ~dst.writemask;
+   ir_to_mesa_src_reg tmp;
+
+   assert(op == OPCODE_SIN || op == OPCODE_COS);
+
+   /* If there are compnents in the destination that differ from the component
+    * that will be written by the SCS instrution, we'll need a temporary.
+    */
+   if (scs_mask != unsigned(dst.writemask)) {
+      tmp = get_temp(glsl_type::vec4_type);
+   }
+
+   for (unsigned i = 0; i < 4; i++) {
+      unsigned this_mask = (1U << i);
+      ir_to_mesa_src_reg src0 = src;
+
+      if ((done_mask & this_mask) != 0)
+	 continue;
+
+      /* The source swizzle specified which component of the source generates
+       * sine / cosine for the current component in the destination.  The SCS
+       * instruction requires that this value be swizzle to the X component.
+       * Replace the current swizzle with a swizzle that puts the source in
+       * the X component.
+       */
+      unsigned src0_swiz = GET_SWZ(src.swizzle, i);
+
+      src0.swizzle = MAKE_SWIZZLE4(src0_swiz, src0_swiz,
+				   src0_swiz, src0_swiz);
+      for (unsigned j = i + 1; j < 4; j++) {
+	 /* If there is another enabled component in the destination that is
+	  * derived from the same inputs, generate its value on this pass as
+	  * well.
+	  */
+	 if (!(done_mask & (1 << j)) &&
+	     GET_SWZ(src0.swizzle, j) == src0_swiz) {
+	    this_mask |= (1 << j);
+	 }
+      }
+
+      if (this_mask != scs_mask) {
+	 ir_to_mesa_instruction *inst;
+	 ir_to_mesa_dst_reg tmp_dst = ir_to_mesa_dst_reg_from_src(tmp);
+
+	 /* Emit the SCS instruction.
+	  */
+	 inst = ir_to_mesa_emit_op1(ir, OPCODE_SCS, tmp_dst, src0);
+	 inst->dst_reg.writemask = scs_mask;
+
+	 /* Move the result of the SCS instruction to the desired location in
+	  * the destination.
+	  */
+	 tmp.swizzle = MAKE_SWIZZLE4(component, component,
+				     component, component);
+	 inst = ir_to_mesa_emit_op1(ir, OPCODE_SCS, dst, tmp);
+	 inst->dst_reg.writemask = this_mask;
+      } else {
+	 /* Emit the SCS instruction to write directly to the destination.
+	  */
+	 ir_to_mesa_instruction *inst =
+	    ir_to_mesa_emit_op1(ir, OPCODE_SCS, dst, src0);
+	 inst->dst_reg.writemask = scs_mask;
+      }
+
+      done_mask |= this_mask;
+   }
+}
+
+struct ir_to_mesa_src_reg
+ir_to_mesa_visitor::src_reg_for_float(float val)
+{
+   ir_to_mesa_src_reg src_reg(PROGRAM_CONSTANT, -1, NULL);
+
+   src_reg.index = _mesa_add_unnamed_constant(this->prog->Parameters,
+					      &val, 1, &src_reg.swizzle);
+
+   return src_reg;
+}
+
+static int
+type_size(const struct glsl_type *type)
+{
+   unsigned int i;
+   int size;
+
+   switch (type->base_type) {
+   case GLSL_TYPE_UINT:
+   case GLSL_TYPE_INT:
+   case GLSL_TYPE_FLOAT:
+   case GLSL_TYPE_BOOL:
+      if (type->is_matrix()) {
+	 return type->matrix_columns;
+      } else {
+	 /* Regardless of size of vector, it gets a vec4. This is bad
+	  * packing for things like floats, but otherwise arrays become a
+	  * mess.  Hopefully a later pass over the code can pack scalars
+	  * down if appropriate.
+	  */
+	 return 1;
+      }
+   case GLSL_TYPE_ARRAY:
+      assert(type->length > 0);
+      return type_size(type->fields.array) * type->length;
+   case GLSL_TYPE_STRUCT:
+      size = 0;
+      for (i = 0; i < type->length; i++) {
+	 size += type_size(type->fields.structure[i].type);
+      }
+      return size;
+   case GLSL_TYPE_SAMPLER:
+      /* Samplers take up one slot in UNIFORMS[], but they're baked in
+       * at link time.
+       */
+      return 1;
+   default:
+      assert(0);
+      return 0;
+   }
+}
+
+/**
+ * In the initial pass of codegen, we assign temporary numbers to
+ * intermediate results.  (not SSA -- variable assignments will reuse
+ * storage).  Actual register allocation for the Mesa VM occurs in a
+ * pass over the Mesa IR later.
+ */
+ir_to_mesa_src_reg
+ir_to_mesa_visitor::get_temp(const glsl_type *type)
+{
+   ir_to_mesa_src_reg src_reg;
+   int swizzle[4];
+   int i;
+
+   src_reg.file = PROGRAM_TEMPORARY;
+   src_reg.index = next_temp;
+   src_reg.reladdr = NULL;
+   next_temp += type_size(type);
+
+   if (type->is_array() || type->is_record()) {
+      src_reg.swizzle = SWIZZLE_NOOP;
+   } else {
+      for (i = 0; i < type->vector_elements; i++)
+	 swizzle[i] = i;
+      for (; i < 4; i++)
+	 swizzle[i] = type->vector_elements - 1;
+      src_reg.swizzle = MAKE_SWIZZLE4(swizzle[0], swizzle[1],
+				      swizzle[2], swizzle[3]);
+   }
+   src_reg.negate = 0;
+
+   return src_reg;
+}
+
+variable_storage *
+ir_to_mesa_visitor::find_variable_storage(ir_variable *var)
+{
+   
+   variable_storage *entry;
+
+   foreach_iter(exec_list_iterator, iter, this->variables) {
+      entry = (variable_storage *)iter.get();
+
+      if (entry->var == var)
+	 return entry;
+   }
+
+   return NULL;
+}
+
+void
+ir_to_mesa_visitor::visit(ir_variable *ir)
+{
+   if (strcmp(ir->name, "gl_FragCoord") == 0) {
+      struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog;
+
+      fp->OriginUpperLeft = ir->origin_upper_left;
+      fp->PixelCenterInteger = ir->pixel_center_integer;
+
+   } else if (strcmp(ir->name, "gl_FragDepth") == 0) {
+      struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog;
+      switch (ir->depth_layout) {
+      case ir_depth_layout_none:
+	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_NONE;
+	 break;
+      case ir_depth_layout_any:
+	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_ANY;
+	 break;
+      case ir_depth_layout_greater:
+	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_GREATER;
+	 break;
+      case ir_depth_layout_less:
+	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_LESS;
+	 break;
+      case ir_depth_layout_unchanged:
+	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_UNCHANGED;
+	 break;
+      default:
+	 assert(0);
+	 break;
+      }
+   }
+
+   if (ir->mode == ir_var_uniform && strncmp(ir->name, "gl_", 3) == 0) {
+      unsigned int i;
+      const ir_state_slot *const slots = ir->state_slots;
+      assert(ir->state_slots != NULL);
+
+      /* Check if this statevar's setup in the STATE file exactly
+       * matches how we'll want to reference it as a
+       * struct/array/whatever.  If not, then we need to move it into
+       * temporary storage and hope that it'll get copy-propagated
+       * out.
+       */
+      for (i = 0; i < ir->num_state_slots; i++) {
+	 if (slots[i].swizzle != SWIZZLE_XYZW) {
+	    break;
+	 }
+      }
+
+      struct variable_storage *storage;
+      ir_to_mesa_dst_reg dst;
+      if (i == ir->num_state_slots) {
+	 /* We'll set the index later. */
+	 storage = new(mem_ctx) variable_storage(ir, PROGRAM_STATE_VAR, -1);
+	 this->variables.push_tail(storage);
+
+	 dst = ir_to_mesa_undef_dst;
+      } else {
+	 /* The variable_storage constructor allocates slots based on the size
+	  * of the type.  However, this had better match the number of state
+	  * elements that we're going to copy into the new temporary.
+	  */
+	 assert(ir->num_state_slots == type_size(ir->type));
+
+	 storage = new(mem_ctx) variable_storage(ir, PROGRAM_TEMPORARY,
+						 this->next_temp);
+	 this->variables.push_tail(storage);
+	 this->next_temp += type_size(ir->type);
+
+	 dst = ir_to_mesa_dst_reg_from_src(ir_to_mesa_src_reg(PROGRAM_TEMPORARY,
+							      storage->index,
+							      NULL));
+      }
+
+
+      for (unsigned int i = 0; i < ir->num_state_slots; i++) {
+	 int index = _mesa_add_state_reference(this->prog->Parameters,
+					       (gl_state_index *)slots[i].tokens);
+
+	 if (storage->file == PROGRAM_STATE_VAR) {
+	    if (storage->index == -1) {
+	       storage->index = index;
+	    } else {
+	       assert(index == storage->index + (int)i);
+	    }
+	 } else {
+	    ir_to_mesa_src_reg src(PROGRAM_STATE_VAR, index, NULL);
+	    src.swizzle = slots[i].swizzle;
+	    ir_to_mesa_emit_op1(ir, OPCODE_MOV, dst, src);
+	    /* even a float takes up a whole vec4 reg in a struct/array. */
+	    dst.index++;
+	 }
+      }
+
+      if (storage->file == PROGRAM_TEMPORARY &&
+	  dst.index != storage->index + ir->num_state_slots) {
+	 fail_link(this->shader_program,
+		   "failed to load builtin uniform `%s'  (%d/%d regs loaded)\n",
+		   ir->name, dst.index - storage->index,
+		   type_size(ir->type));
+      }
+   }
+}
+
+void
+ir_to_mesa_visitor::visit(ir_loop *ir)
+{
+   ir_dereference_variable *counter = NULL;
+
+   if (ir->counter != NULL)
+      counter = new(ir) ir_dereference_variable(ir->counter);
+
+   if (ir->from != NULL) {
+      assert(ir->counter != NULL);
+
+      ir_assignment *a = new(ir) ir_assignment(counter, ir->from, NULL);
+
+      a->accept(this);
+      delete a;
+   }
+
+   ir_to_mesa_emit_op0(NULL, OPCODE_BGNLOOP);
+
+   if (ir->to) {
+      ir_expression *e =
+	 new(ir) ir_expression(ir->cmp, glsl_type::bool_type,
+			       counter, ir->to);
+      ir_if *if_stmt =  new(ir) ir_if(e);
+
+      ir_loop_jump *brk = new(ir) ir_loop_jump(ir_loop_jump::jump_break);
+
+      if_stmt->then_instructions.push_tail(brk);
+
+      if_stmt->accept(this);
+
+      delete if_stmt;
+      delete e;
+      delete brk;
+   }
+
+   visit_exec_list(&ir->body_instructions, this);
+
+   if (ir->increment) {
+      ir_expression *e =
+	 new(ir) ir_expression(ir_binop_add, counter->type,
+			       counter, ir->increment);
+
+      ir_assignment *a = new(ir) ir_assignment(counter, e, NULL);
+
+      a->accept(this);
+      delete a;
+      delete e;
+   }
+
+   ir_to_mesa_emit_op0(NULL, OPCODE_ENDLOOP);
+}
+
+void
+ir_to_mesa_visitor::visit(ir_loop_jump *ir)
+{
+   switch (ir->mode) {
+   case ir_loop_jump::jump_break:
+      ir_to_mesa_emit_op0(NULL, OPCODE_BRK);
+      break;
+   case ir_loop_jump::jump_continue:
+      ir_to_mesa_emit_op0(NULL, OPCODE_CONT);
+      break;
+   }
+}
+
+
+void
+ir_to_mesa_visitor::visit(ir_function_signature *ir)
+{
+   assert(0);
+   (void)ir;
+}
+
+void
+ir_to_mesa_visitor::visit(ir_function *ir)
+{
+   /* Ignore function bodies other than main() -- we shouldn't see calls to
+    * them since they should all be inlined before we get to ir_to_mesa.
+    */
+   if (strcmp(ir->name, "main") == 0) {
+      const ir_function_signature *sig;
+      exec_list empty;
+
+      sig = ir->matching_signature(&empty);
+
+      assert(sig);
+
+      foreach_iter(exec_list_iterator, iter, sig->body) {
+	 ir_instruction *ir = (ir_instruction *)iter.get();
+
+	 ir->accept(this);
+      }
+   }
+}
+
+GLboolean
+ir_to_mesa_visitor::try_emit_mad(ir_expression *ir, int mul_operand)
+{
+   int nonmul_operand = 1 - mul_operand;
+   ir_to_mesa_src_reg a, b, c;
+
+   ir_expression *expr = ir->operands[mul_operand]->as_expression();
+   if (!expr || expr->operation != ir_binop_mul)
+      return false;
+
+   expr->operands[0]->accept(this);
+   a = this->result;
+   expr->operands[1]->accept(this);
+   b = this->result;
+   ir->operands[nonmul_operand]->accept(this);
+   c = this->result;
+
+   this->result = get_temp(ir->type);
+   ir_to_mesa_emit_op3(ir, OPCODE_MAD,
+		       ir_to_mesa_dst_reg_from_src(this->result), a, b, c);
+
+   return true;
+}
+
+GLboolean
+ir_to_mesa_visitor::try_emit_sat(ir_expression *ir)
+{
+   /* Saturates were only introduced to vertex programs in
+    * NV_vertex_program3, so don't give them to drivers in the VP.
+    */
+   if (this->prog->Target == GL_VERTEX_PROGRAM_ARB)
+      return false;
+
+   ir_rvalue *sat_src = ir->as_rvalue_to_saturate();
+   if (!sat_src)
+      return false;
+
+   sat_src->accept(this);
+   ir_to_mesa_src_reg src = this->result;
+
+   this->result = get_temp(ir->type);
+   ir_to_mesa_instruction *inst;
+   inst = ir_to_mesa_emit_op1(ir, OPCODE_MOV,
+			      ir_to_mesa_dst_reg_from_src(this->result),
+			      src);
+   inst->saturate = true;
+
+   return true;
+}
+
+void
+ir_to_mesa_visitor::reladdr_to_temp(ir_instruction *ir,
+				    ir_to_mesa_src_reg *reg, int *num_reladdr)
+{
+   if (!reg->reladdr)
+      return;
+
+   ir_to_mesa_emit_op1(ir, OPCODE_ARL, ir_to_mesa_address_reg, *reg->reladdr);
+
+   if (*num_reladdr != 1) {
+      ir_to_mesa_src_reg temp = get_temp(glsl_type::vec4_type);
+
+      ir_to_mesa_emit_op1(ir, OPCODE_MOV,
+			  ir_to_mesa_dst_reg_from_src(temp), *reg);
+      *reg = temp;
+   }
+
+   (*num_reladdr)--;
+}
+
+void
+ir_to_mesa_visitor::emit_swz(ir_expression *ir)
+{
+   /* Assume that the vector operator is in a form compatible with OPCODE_SWZ.
+    * This means that each of the operands is either an immediate value of -1,
+    * 0, or 1, or is a component from one source register (possibly with
+    * negation).
+    */
+   uint8_t components[4] = { 0 };
+   bool negate[4] = { false };
+   ir_variable *var = NULL;
+
+   for (unsigned i = 0; i < ir->type->vector_elements; i++) {
+      ir_rvalue *op = ir->operands[i];
+
+      assert(op->type->is_scalar());
+
+      while (op != NULL) {
+	 switch (op->ir_type) {
+	 case ir_type_constant: {
+
+	    assert(op->type->is_scalar());
+
+	    const ir_constant *const c = op->as_constant();
+	    if (c->is_one()) {
+	       components[i] = SWIZZLE_ONE;
+	    } else if (c->is_zero()) {
+	       components[i] = SWIZZLE_ZERO;
+	    } else if (c->is_negative_one()) {
+	       components[i] = SWIZZLE_ONE;
+	       negate[i] = true;
+	    } else {
+	       assert(!"SWZ constant must be 0.0 or 1.0.");
+	    }
+
+	    op = NULL;
+	    break;
+	 }
+
+	 case ir_type_dereference_variable: {
+	    ir_dereference_variable *const deref =
+	       (ir_dereference_variable *) op;
+
+	    assert((var == NULL) || (deref->var == var));
+	    components[i] = SWIZZLE_X;
+	    var = deref->var;
+	    op = NULL;
+	    break;
+	 }
+
+	 case ir_type_expression: {
+	    ir_expression *const expr = (ir_expression *) op;
+
+	    assert(expr->operation == ir_unop_neg);
+	    negate[i] = true;
+
+	    op = expr->operands[0];
+	    break;
+	 }
+
+	 case ir_type_swizzle: {
+	    ir_swizzle *const swiz = (ir_swizzle *) op;
+
+	    components[i] = swiz->mask.x;
+	    op = swiz->val;
+	    break;
+	 }
+
+	 default:
+	    assert(!"Should not get here.");
+	    return;
+	 }
+      }
+   }
+
+   assert(var != NULL);
+
+   ir_dereference_variable *const deref =
+      new(mem_ctx) ir_dereference_variable(var);
+
+   this->result.file = PROGRAM_UNDEFINED;
+   deref->accept(this);
+   if (this->result.file == PROGRAM_UNDEFINED) {
+      ir_print_visitor v;
+      printf("Failed to get tree for expression operand:\n");
+      deref->accept(&v);
+      exit(1);
+   }
+
+   ir_to_mesa_src_reg src;
+
+   src = this->result;
+   src.swizzle = MAKE_SWIZZLE4(components[0],
+			       components[1],
+			       components[2],
+			       components[3]);
+   src.negate = ((unsigned(negate[0]) << 0)
+		 | (unsigned(negate[1]) << 1)
+		 | (unsigned(negate[2]) << 2)
+		 | (unsigned(negate[3]) << 3));
+
+   /* Storage for our result.  Ideally for an assignment we'd be using the
+    * actual storage for the result here, instead.
+    */
+   const ir_to_mesa_src_reg result_src = get_temp(ir->type);
+   ir_to_mesa_dst_reg result_dst = ir_to_mesa_dst_reg_from_src(result_src);
+
+   /* Limit writes to the channels that will be used by result_src later.
+    * This does limit this temp's use as a temporary for multi-instruction
+    * sequences.
+    */
+   result_dst.writemask = (1 << ir->type->vector_elements) - 1;
+
+   ir_to_mesa_emit_op1(ir, OPCODE_SWZ, result_dst, src);
+   this->result = result_src;
+}
+
+void
+ir_to_mesa_visitor::visit(ir_expression *ir)
+{
+   unsigned int operand;
+   struct ir_to_mesa_src_reg op[Elements(ir->operands)];
+   struct ir_to_mesa_src_reg result_src;
+   struct ir_to_mesa_dst_reg result_dst;
+
+   /* Quick peephole: Emit OPCODE_MAD(a, b, c) instead of ADD(MUL(a, b), c)
+    */
+   if (ir->operation == ir_binop_add) {
+      if (try_emit_mad(ir, 1))
+	 return;
+      if (try_emit_mad(ir, 0))
+	 return;
+   }
+   if (try_emit_sat(ir))
+      return;
+
+   if (ir->operation == ir_quadop_vector) {
+      this->emit_swz(ir);
+      return;
+   }
+
+   for (operand = 0; operand < ir->get_num_operands(); operand++) {
+      this->result.file = PROGRAM_UNDEFINED;
+      ir->operands[operand]->accept(this);
+      if (this->result.file == PROGRAM_UNDEFINED) {
+	 ir_print_visitor v;
+	 printf("Failed to get tree for expression operand:\n");
+	 ir->operands[operand]->accept(&v);
+	 exit(1);
+      }
+      op[operand] = this->result;
+
+      /* Matrix expression operands should have been broken down to vector
+       * operations already.
+       */
+      assert(!ir->operands[operand]->type->is_matrix());
+   }
+
+   int vector_elements = ir->operands[0]->type->vector_elements;
+   if (ir->operands[1]) {
+      vector_elements = MAX2(vector_elements,
+			     ir->operands[1]->type->vector_elements);
+   }
+
+   this->result.file = PROGRAM_UNDEFINED;
+
+   /* Storage for our result.  Ideally for an assignment we'd be using
+    * the actual storage for the result here, instead.
+    */
+   result_src = get_temp(ir->type);
+   /* convenience for the emit functions below. */
+   result_dst = ir_to_mesa_dst_reg_from_src(result_src);
+   /* Limit writes to the channels that will be used by result_src later.
+    * This does limit this temp's use as a temporary for multi-instruction
+    * sequences.
+    */
+   result_dst.writemask = (1 << ir->type->vector_elements) - 1;
+
+   switch (ir->operation) {
+   case ir_unop_logic_not:
+      ir_to_mesa_emit_op2(ir, OPCODE_SEQ, result_dst,
+			  op[0], src_reg_for_float(0.0));
+      break;
+   case ir_unop_neg:
+      op[0].negate = ~op[0].negate;
+      result_src = op[0];
+      break;
+   case ir_unop_abs:
+      ir_to_mesa_emit_op1(ir, OPCODE_ABS, result_dst, op[0]);
+      break;
+   case ir_unop_sign:
+      ir_to_mesa_emit_op1(ir, OPCODE_SSG, result_dst, op[0]);
+      break;
+   case ir_unop_rcp:
+      ir_to_mesa_emit_scalar_op1(ir, OPCODE_RCP, result_dst, op[0]);
+      break;
+
+   case ir_unop_exp2:
+      ir_to_mesa_emit_scalar_op1(ir, OPCODE_EX2, result_dst, op[0]);
+      break;
+   case ir_unop_exp:
+   case ir_unop_log:
+      assert(!"not reached: should be handled by ir_explog_to_explog2");
+      break;
+   case ir_unop_log2:
+      ir_to_mesa_emit_scalar_op1(ir, OPCODE_LG2, result_dst, op[0]);
+      break;
+   case ir_unop_sin:
+      ir_to_mesa_emit_scalar_op1(ir, OPCODE_SIN, result_dst, op[0]);
+      break;
+   case ir_unop_cos:
+      ir_to_mesa_emit_scalar_op1(ir, OPCODE_COS, result_dst, op[0]);
+      break;
+   case ir_unop_sin_reduced:
+      emit_scs(ir, OPCODE_SIN, result_dst, op[0]);
+      break;
+   case ir_unop_cos_reduced:
+      emit_scs(ir, OPCODE_COS, result_dst, op[0]);
+      break;
+
+   case ir_unop_dFdx:
+      ir_to_mesa_emit_op1(ir, OPCODE_DDX, result_dst, op[0]);
+      break;
+   case ir_unop_dFdy:
+      ir_to_mesa_emit_op1(ir, OPCODE_DDY, result_dst, op[0]);
+      break;
+
+   case ir_unop_noise: {
+      const enum prog_opcode opcode =
+	 prog_opcode(OPCODE_NOISE1
+		     + (ir->operands[0]->type->vector_elements) - 1);
+      assert((opcode >= OPCODE_NOISE1) && (opcode <= OPCODE_NOISE4));
+
+      ir_to_mesa_emit_op1(ir, opcode, result_dst, op[0]);
+      break;
+   }
+
+   case ir_binop_add:
+      ir_to_mesa_emit_op2(ir, OPCODE_ADD, result_dst, op[0], op[1]);
+      break;
+   case ir_binop_sub:
+      ir_to_mesa_emit_op2(ir, OPCODE_SUB, result_dst, op[0], op[1]);
+      break;
+
+   case ir_binop_mul:
+      ir_to_mesa_emit_op2(ir, OPCODE_MUL, result_dst, op[0], op[1]);
+      break;
+   case ir_binop_div:
+      assert(!"not reached: should be handled by ir_div_to_mul_rcp");
+   case ir_binop_mod:
+      assert(!"ir_binop_mod should have been converted to b * fract(a/b)");
+      break;
+
+   case ir_binop_less:
+      ir_to_mesa_emit_op2(ir, OPCODE_SLT, result_dst, op[0], op[1]);
+      break;
+   case ir_binop_greater:
+      ir_to_mesa_emit_op2(ir, OPCODE_SGT, result_dst, op[0], op[1]);
+      break;
+   case ir_binop_lequal:
+      ir_to_mesa_emit_op2(ir, OPCODE_SLE, result_dst, op[0], op[1]);
+      break;
+   case ir_binop_gequal:
+      ir_to_mesa_emit_op2(ir, OPCODE_SGE, result_dst, op[0], op[1]);
+      break;
+   case ir_binop_equal:
+      ir_to_mesa_emit_op2(ir, OPCODE_SEQ, result_dst, op[0], op[1]);
+      break;
+   case ir_binop_nequal:
+      ir_to_mesa_emit_op2(ir, OPCODE_SNE, result_dst, op[0], op[1]);
+      break;
+   case ir_binop_all_equal:
+      /* "==" operator producing a scalar boolean. */
+      if (ir->operands[0]->type->is_vector() ||
+	  ir->operands[1]->type->is_vector()) {
+	 ir_to_mesa_src_reg temp = get_temp(glsl_type::vec4_type);
+	 ir_to_mesa_emit_op2(ir, OPCODE_SNE,
+			     ir_to_mesa_dst_reg_from_src(temp), op[0], op[1]);
+	 ir_to_mesa_emit_dp(ir, result_dst, temp, temp, vector_elements);
+	 ir_to_mesa_emit_op2(ir, OPCODE_SEQ,
+			     result_dst, result_src, src_reg_for_float(0.0));
+      } else {
+	 ir_to_mesa_emit_op2(ir, OPCODE_SEQ, result_dst, op[0], op[1]);
+      }
+      break;
+   case ir_binop_any_nequal:
+      /* "!=" operator producing a scalar boolean. */
+      if (ir->operands[0]->type->is_vector() ||
+	  ir->operands[1]->type->is_vector()) {
+	 ir_to_mesa_src_reg temp = get_temp(glsl_type::vec4_type);
+	 ir_to_mesa_emit_op2(ir, OPCODE_SNE,
+			     ir_to_mesa_dst_reg_from_src(temp), op[0], op[1]);
+	 ir_to_mesa_emit_dp(ir, result_dst, temp, temp, vector_elements);
+	 ir_to_mesa_emit_op2(ir, OPCODE_SNE,
+			     result_dst, result_src, src_reg_for_float(0.0));
+      } else {
+	 ir_to_mesa_emit_op2(ir, OPCODE_SNE, result_dst, op[0], op[1]);
+      }
+      break;
+
+   case ir_unop_any:
+      assert(ir->operands[0]->type->is_vector());
+      ir_to_mesa_emit_dp(ir, result_dst, op[0], op[0],
+			 ir->operands[0]->type->vector_elements);
+      ir_to_mesa_emit_op2(ir, OPCODE_SNE,
+			  result_dst, result_src, src_reg_for_float(0.0));
+      break;
+
+   case ir_binop_logic_xor:
+      ir_to_mesa_emit_op2(ir, OPCODE_SNE, result_dst, op[0], op[1]);
+      break;
+
+   case ir_binop_logic_or:
+      /* This could be a saturated add and skip the SNE. */
+      ir_to_mesa_emit_op2(ir, OPCODE_ADD,
+			  result_dst,
+			  op[0], op[1]);
+
+      ir_to_mesa_emit_op2(ir, OPCODE_SNE,
+			  result_dst,
+			  result_src, src_reg_for_float(0.0));
+      break;
+
+   case ir_binop_logic_and:
+      /* the bool args are stored as float 0.0 or 1.0, so "mul" gives us "and". */
+      ir_to_mesa_emit_op2(ir, OPCODE_MUL,
+			  result_dst,
+			  op[0], op[1]);
+      break;
+
+   case ir_binop_dot:
+      assert(ir->operands[0]->type->is_vector());
+      assert(ir->operands[0]->type == ir->operands[1]->type);
+      ir_to_mesa_emit_dp(ir, result_dst, op[0], op[1],
+			 ir->operands[0]->type->vector_elements);
+      break;
+
+   case ir_unop_sqrt:
+      /* sqrt(x) = x * rsq(x). */
+      ir_to_mesa_emit_scalar_op1(ir, OPCODE_RSQ, result_dst, op[0]);
+      ir_to_mesa_emit_op2(ir, OPCODE_MUL, result_dst, result_src, op[0]);
+      /* For incoming channels <= 0, set the result to 0. */
+      op[0].negate = ~op[0].negate;
+      ir_to_mesa_emit_op3(ir, OPCODE_CMP, result_dst,
+			  op[0], result_src, src_reg_for_float(0.0));
+      break;
+   case ir_unop_rsq:
+      ir_to_mesa_emit_scalar_op1(ir, OPCODE_RSQ, result_dst, op[0]);
+      break;
+   case ir_unop_i2f:
+   case ir_unop_b2f:
+   case ir_unop_b2i:
+      /* Mesa IR lacks types, ints are stored as truncated floats. */
+      result_src = op[0];
+      break;
+   case ir_unop_f2i:
+      ir_to_mesa_emit_op1(ir, OPCODE_TRUNC, result_dst, op[0]);
+      break;
+   case ir_unop_f2b:
+   case ir_unop_i2b:
+      ir_to_mesa_emit_op2(ir, OPCODE_SNE, result_dst,
+			  op[0], src_reg_for_float(0.0));
+      break;
+   case ir_unop_trunc:
+      ir_to_mesa_emit_op1(ir, OPCODE_TRUNC, result_dst, op[0]);
+      break;
+   case ir_unop_ceil:
+      op[0].negate = ~op[0].negate;
+      ir_to_mesa_emit_op1(ir, OPCODE_FLR, result_dst, op[0]);
+      result_src.negate = ~result_src.negate;
+      break;
+   case ir_unop_floor:
+      ir_to_mesa_emit_op1(ir, OPCODE_FLR, result_dst, op[0]);
+      break;
+   case ir_unop_fract:
+      ir_to_mesa_emit_op1(ir, OPCODE_FRC, result_dst, op[0]);
+      break;
+
+   case ir_binop_min:
+      ir_to_mesa_emit_op2(ir, OPCODE_MIN, result_dst, op[0], op[1]);
+      break;
+   case ir_binop_max:
+      ir_to_mesa_emit_op2(ir, OPCODE_MAX, result_dst, op[0], op[1]);
+      break;
+   case ir_binop_pow:
+      ir_to_mesa_emit_scalar_op2(ir, OPCODE_POW, result_dst, op[0], op[1]);
+      break;
+
+   case ir_unop_bit_not:
+   case ir_unop_u2f:
+   case ir_binop_lshift:
+   case ir_binop_rshift:
+   case ir_binop_bit_and:
+   case ir_binop_bit_xor:
+   case ir_binop_bit_or:
+   case ir_unop_round_even:
+      assert(!"GLSL 1.30 features unsupported");
+      break;
+
+   case ir_quadop_vector:
+      /* This operation should have already been handled.
+       */
+      assert(!"Should not get here.");
+      break;
+   }
+
+   this->result = result_src;
+}
+
+
+void
+ir_to_mesa_visitor::visit(ir_swizzle *ir)
+{
+   ir_to_mesa_src_reg src_reg;
+   int i;
+   int swizzle[4];
+
+   /* Note that this is only swizzles in expressions, not those on the left
+    * hand side of an assignment, which do write masking.  See ir_assignment
+    * for that.
+    */
+
+   ir->val->accept(this);
+   src_reg = this->result;
+   assert(src_reg.file != PROGRAM_UNDEFINED);
+
+   for (i = 0; i < 4; i++) {
+      if (i < ir->type->vector_elements) {
+	 switch (i) {
+	 case 0:
+	    swizzle[i] = GET_SWZ(src_reg.swizzle, ir->mask.x);
+	    break;
+	 case 1:
+	    swizzle[i] = GET_SWZ(src_reg.swizzle, ir->mask.y);
+	    break;
+	 case 2:
+	    swizzle[i] = GET_SWZ(src_reg.swizzle, ir->mask.z);
+	    break;
+	 case 3:
+	    swizzle[i] = GET_SWZ(src_reg.swizzle, ir->mask.w);
+	    break;
+	 }
+      } else {
+	 /* If the type is smaller than a vec4, replicate the last
+	  * channel out.
+	  */
+	 swizzle[i] = swizzle[ir->type->vector_elements - 1];
+      }
+   }
+
+   src_reg.swizzle = MAKE_SWIZZLE4(swizzle[0],
+				   swizzle[1],
+				   swizzle[2],
+				   swizzle[3]);
+
+   this->result = src_reg;
+}
+
+void
+ir_to_mesa_visitor::visit(ir_dereference_variable *ir)
+{
+   variable_storage *entry = find_variable_storage(ir->var);
+   ir_variable *var = ir->var;
+
+   if (!entry) {
+      switch (var->mode) {
+      case ir_var_uniform:
+	 entry = new(mem_ctx) variable_storage(var, PROGRAM_UNIFORM,
+					       var->location);
+	 this->variables.push_tail(entry);
+	 break;
+      case ir_var_in:
+      case ir_var_inout:
+	 /* The linker assigns locations for varyings and attributes,
+	  * including deprecated builtins (like gl_Color), user-assign
+	  * generic attributes (glBindVertexLocation), and
+	  * user-defined varyings.
+	  *
+	  * FINISHME: We would hit this path for function arguments.  Fix!
+	  */
+	 assert(var->location != -1);
+         entry = new(mem_ctx) variable_storage(var,
+                                               PROGRAM_INPUT,
+                                               var->location);
+         if (this->prog->Target == GL_VERTEX_PROGRAM_ARB &&
+             var->location >= VERT_ATTRIB_GENERIC0) {
+            _mesa_add_attribute(this->prog->Attributes,
+                                var->name,
+                                _mesa_sizeof_glsl_type(var->type->gl_type),
+                                var->type->gl_type,
+                                var->location - VERT_ATTRIB_GENERIC0);
+         }
+         break;
+      case ir_var_out:
+	 assert(var->location != -1);
+         entry = new(mem_ctx) variable_storage(var,
+                                               PROGRAM_OUTPUT,
+                                               var->location);
+	 break;
+      case ir_var_system_value:
+         entry = new(mem_ctx) variable_storage(var,
+                                               PROGRAM_SYSTEM_VALUE,
+                                               var->location);
+         break;
+      case ir_var_auto:
+      case ir_var_temporary:
+	 entry = new(mem_ctx) variable_storage(var, PROGRAM_TEMPORARY,
+					       this->next_temp);
+	 this->variables.push_tail(entry);
+
+	 next_temp += type_size(var->type);
+	 break;
+      }
+
+      if (!entry) {
+	 printf("Failed to make storage for %s\n", var->name);
+	 exit(1);
+      }
+   }
+
+   this->result = ir_to_mesa_src_reg(entry->file, entry->index, var->type);
+}
+
+void
+ir_to_mesa_visitor::visit(ir_dereference_array *ir)
+{
+   ir_constant *index;
+   ir_to_mesa_src_reg src_reg;
+   int element_size = type_size(ir->type);
+
+   index = ir->array_index->constant_expression_value();
+
+   ir->array->accept(this);
+   src_reg = this->result;
+
+   if (index) {
+      src_reg.index += index->value.i[0] * element_size;
+   } else {
+      ir_to_mesa_src_reg array_base = this->result;
+      /* Variable index array dereference.  It eats the "vec4" of the
+       * base of the array and an index that offsets the Mesa register
+       * index.
+       */
+      ir->array_index->accept(this);
+
+      ir_to_mesa_src_reg index_reg;
+
+      if (element_size == 1) {
+	 index_reg = this->result;
+      } else {
+	 index_reg = get_temp(glsl_type::float_type);
+
+	 ir_to_mesa_emit_op2(ir, OPCODE_MUL,
+			     ir_to_mesa_dst_reg_from_src(index_reg),
+			     this->result, src_reg_for_float(element_size));
+      }
+
+      src_reg.reladdr = ralloc(mem_ctx, ir_to_mesa_src_reg);
+      memcpy(src_reg.reladdr, &index_reg, sizeof(index_reg));
+   }
+
+   /* If the type is smaller than a vec4, replicate the last channel out. */
+   if (ir->type->is_scalar() || ir->type->is_vector())
+      src_reg.swizzle = swizzle_for_size(ir->type->vector_elements);
+   else
+      src_reg.swizzle = SWIZZLE_NOOP;
+
+   this->result = src_reg;
+}
+
+void
+ir_to_mesa_visitor::visit(ir_dereference_record *ir)
+{
+   unsigned int i;
+   const glsl_type *struct_type = ir->record->type;
+   int offset = 0;
+
+   ir->record->accept(this);
+
+   for (i = 0; i < struct_type->length; i++) {
+      if (strcmp(struct_type->fields.structure[i].name, ir->field) == 0)
+	 break;
+      offset += type_size(struct_type->fields.structure[i].type);
+   }
+
+   /* If the type is smaller than a vec4, replicate the last channel out. */
+   if (ir->type->is_scalar() || ir->type->is_vector())
+      this->result.swizzle = swizzle_for_size(ir->type->vector_elements);
+   else
+      this->result.swizzle = SWIZZLE_NOOP;
+
+   this->result.index += offset;
+}
+
+/**
+ * We want to be careful in assignment setup to hit the actual storage
+ * instead of potentially using a temporary like we might with the
+ * ir_dereference handler.
+ */
+static struct ir_to_mesa_dst_reg
+get_assignment_lhs(ir_dereference *ir, ir_to_mesa_visitor *v)
+{
+   /* The LHS must be a dereference.  If the LHS is a variable indexed array
+    * access of a vector, it must be separated into a series conditional moves
+    * before reaching this point (see ir_vec_index_to_cond_assign).
+    */
+   assert(ir->as_dereference());
+   ir_dereference_array *deref_array = ir->as_dereference_array();
+   if (deref_array) {
+      assert(!deref_array->array->type->is_vector());
+   }
+
+   /* Use the rvalue deref handler for the most part.  We'll ignore
+    * swizzles in it and write swizzles using writemask, though.
+    */
+   ir->accept(v);
+   return ir_to_mesa_dst_reg_from_src(v->result);
+}
+
+/**
+ * Process the condition of a conditional assignment
+ *
+ * Examines the condition of a conditional assignment to generate the optimal
+ * first operand of a \c CMP instruction.  If the condition is a relational
+ * operator with 0 (e.g., \c ir_binop_less), the value being compared will be
+ * used as the source for the \c CMP instruction.  Otherwise the comparison
+ * is processed to a boolean result, and the boolean result is used as the
+ * operand to the CMP instruction.
+ */
+bool
+ir_to_mesa_visitor::process_move_condition(ir_rvalue *ir)
+{
+   ir_rvalue *src_ir = ir;
+   bool negate = true;
+   bool switch_order = false;
+
+   ir_expression *const expr = ir->as_expression();
+   if ((expr != NULL) && (expr->get_num_operands() == 2)) {
+      bool zero_on_left = false;
+
+      if (expr->operands[0]->is_zero()) {
+	 src_ir = expr->operands[1];
+	 zero_on_left = true;
+      } else if (expr->operands[1]->is_zero()) {
+	 src_ir = expr->operands[0];
+	 zero_on_left = false;
+      }
+
+      /*      a is -  0  +            -  0  +
+       * (a <  0)  T  F  F  ( a < 0)  T  F  F
+       * (0 <  a)  F  F  T  (-a < 0)  F  F  T
+       * (a <= 0)  T  T  F  (-a < 0)  F  F  T  (swap order of other operands)
+       * (0 <= a)  F  T  T  ( a < 0)  T  F  F  (swap order of other operands)
+       * (a >  0)  F  F  T  (-a < 0)  F  F  T
+       * (0 >  a)  T  F  F  ( a < 0)  T  F  F
+       * (a >= 0)  F  T  T  ( a < 0)  T  F  F  (swap order of other operands)
+       * (0 >= a)  T  T  F  (-a < 0)  F  F  T  (swap order of other operands)
+       *
+       * Note that exchanging the order of 0 and 'a' in the comparison simply
+       * means that the value of 'a' should be negated.
+       */
+      if (src_ir != ir) {
+	 switch (expr->operation) {
+	 case ir_binop_less:
+	    switch_order = false;
+	    negate = zero_on_left;
+	    break;
+
+	 case ir_binop_greater:
+	    switch_order = false;
+	    negate = !zero_on_left;
+	    break;
+
+	 case ir_binop_lequal:
+	    switch_order = true;
+	    negate = !zero_on_left;
+	    break;
+
+	 case ir_binop_gequal:
+	    switch_order = true;
+	    negate = zero_on_left;
+	    break;
+
+	 default:
+	    /* This isn't the right kind of comparison afterall, so make sure
+	     * the whole condition is visited.
+	     */
+	    src_ir = ir;
+	    break;
+	 }
+      }
+   }
+
+   src_ir->accept(this);
+
+   /* We use the OPCODE_CMP (a < 0 ? b : c) for conditional moves, and the
+    * condition we produced is 0.0 or 1.0.  By flipping the sign, we can
+    * choose which value OPCODE_CMP produces without an extra instruction
+    * computing the condition.
+    */
+   if (negate)
+      this->result.negate = ~this->result.negate;
+
+   return switch_order;
+}
+
+void
+ir_to_mesa_visitor::visit(ir_assignment *ir)
+{
+   struct ir_to_mesa_dst_reg l;
+   struct ir_to_mesa_src_reg r;
+   int i;
+
+   ir->rhs->accept(this);
+   r = this->result;
+
+   l = get_assignment_lhs(ir->lhs, this);
+
+   /* FINISHME: This should really set to the correct maximal writemask for each
+    * FINISHME: component written (in the loops below).  This case can only
+    * FINISHME: occur for matrices, arrays, and structures.
+    */
+   if (ir->write_mask == 0) {
+      assert(!ir->lhs->type->is_scalar() && !ir->lhs->type->is_vector());
+      l.writemask = WRITEMASK_XYZW;
+   } else if (ir->lhs->type->is_scalar()) {
+      /* FINISHME: This hack makes writing to gl_FragDepth, which lives in the
+       * FINISHME: W component of fragment shader output zero, work correctly.
+       */
+      l.writemask = WRITEMASK_XYZW;
+   } else {
+      int swizzles[4];
+      int first_enabled_chan = 0;
+      int rhs_chan = 0;
+
+      assert(ir->lhs->type->is_vector());
+      l.writemask = ir->write_mask;
+
+      for (int i = 0; i < 4; i++) {
+	 if (l.writemask & (1 << i)) {
+	    first_enabled_chan = GET_SWZ(r.swizzle, i);
+	    break;
+	 }
+      }
+
+      /* Swizzle a small RHS vector into the channels being written.
+       *
+       * glsl ir treats write_mask as dictating how many channels are
+       * present on the RHS while Mesa IR treats write_mask as just
+       * showing which channels of the vec4 RHS get written.
+       */
+      for (int i = 0; i < 4; i++) {
+	 if (l.writemask & (1 << i))
+	    swizzles[i] = GET_SWZ(r.swizzle, rhs_chan++);
+	 else
+	    swizzles[i] = first_enabled_chan;
+      }
+      r.swizzle = MAKE_SWIZZLE4(swizzles[0], swizzles[1],
+				swizzles[2], swizzles[3]);
+   }
+
+   assert(l.file != PROGRAM_UNDEFINED);
+   assert(r.file != PROGRAM_UNDEFINED);
+
+   if (ir->condition) {
+      const bool switch_order = this->process_move_condition(ir->condition);
+      ir_to_mesa_src_reg condition = this->result;
+
+      for (i = 0; i < type_size(ir->lhs->type); i++) {
+	 if (switch_order) {
+	    ir_to_mesa_emit_op3(ir, OPCODE_CMP, l,
+				condition, ir_to_mesa_src_reg_from_dst(l), r);
+	 } else {
+	    ir_to_mesa_emit_op3(ir, OPCODE_CMP, l,
+				condition, r, ir_to_mesa_src_reg_from_dst(l));
+	 }
+
+	 l.index++;
+	 r.index++;
+      }
+   } else {
+      for (i = 0; i < type_size(ir->lhs->type); i++) {
+	 ir_to_mesa_emit_op1(ir, OPCODE_MOV, l, r);
+	 l.index++;
+	 r.index++;
+      }
+   }
+}
+
+
+void
+ir_to_mesa_visitor::visit(ir_constant *ir)
+{
+   ir_to_mesa_src_reg src_reg;
+   GLfloat stack_vals[4] = { 0 };
+   GLfloat *values = stack_vals;
+   unsigned int i;
+
+   /* Unfortunately, 4 floats is all we can get into
+    * _mesa_add_unnamed_constant.  So, make a temp to store an
+    * aggregate constant and move each constant value into it.  If we
+    * get lucky, copy propagation will eliminate the extra moves.
+    */
+
+   if (ir->type->base_type == GLSL_TYPE_STRUCT) {
+      ir_to_mesa_src_reg temp_base = get_temp(ir->type);
+      ir_to_mesa_dst_reg temp = ir_to_mesa_dst_reg_from_src(temp_base);
+
+      foreach_iter(exec_list_iterator, iter, ir->components) {
+	 ir_constant *field_value = (ir_constant *)iter.get();
+	 int size = type_size(field_value->type);
+
+	 assert(size > 0);
+
+	 field_value->accept(this);
+	 src_reg = this->result;
+
+	 for (i = 0; i < (unsigned int)size; i++) {
+	    ir_to_mesa_emit_op1(ir, OPCODE_MOV, temp, src_reg);
+
+	    src_reg.index++;
+	    temp.index++;
+	 }
+      }
+      this->result = temp_base;
+      return;
+   }
+
+   if (ir->type->is_array()) {
+      ir_to_mesa_src_reg temp_base = get_temp(ir->type);
+      ir_to_mesa_dst_reg temp = ir_to_mesa_dst_reg_from_src(temp_base);
+      int size = type_size(ir->type->fields.array);
+
+      assert(size > 0);
+
+      for (i = 0; i < ir->type->length; i++) {
+	 ir->array_elements[i]->accept(this);
+	 src_reg = this->result;
+	 for (int j = 0; j < size; j++) {
+	    ir_to_mesa_emit_op1(ir, OPCODE_MOV, temp, src_reg);
+
+	    src_reg.index++;
+	    temp.index++;
+	 }
+      }
+      this->result = temp_base;
+      return;
+   }
+
+   if (ir->type->is_matrix()) {
+      ir_to_mesa_src_reg mat = get_temp(ir->type);
+      ir_to_mesa_dst_reg mat_column = ir_to_mesa_dst_reg_from_src(mat);
+
+      for (i = 0; i < ir->type->matrix_columns; i++) {
+	 assert(ir->type->base_type == GLSL_TYPE_FLOAT);
+	 values = &ir->value.f[i * ir->type->vector_elements];
+
+	 src_reg = ir_to_mesa_src_reg(PROGRAM_CONSTANT, -1, NULL);
+	 src_reg.index = _mesa_add_unnamed_constant(this->prog->Parameters,
+						values,
+						ir->type->vector_elements,
+						&src_reg.swizzle);
+	 ir_to_mesa_emit_op1(ir, OPCODE_MOV, mat_column, src_reg);
+
+	 mat_column.index++;
+      }
+
+      this->result = mat;
+      return;
+   }
+
+   src_reg.file = PROGRAM_CONSTANT;
+   switch (ir->type->base_type) {
+   case GLSL_TYPE_FLOAT:
+      values = &ir->value.f[0];
+      break;
+   case GLSL_TYPE_UINT:
+      for (i = 0; i < ir->type->vector_elements; i++) {
+	 values[i] = ir->value.u[i];
+      }
+      break;
+   case GLSL_TYPE_INT:
+      for (i = 0; i < ir->type->vector_elements; i++) {
+	 values[i] = ir->value.i[i];
+      }
+      break;
+   case GLSL_TYPE_BOOL:
+      for (i = 0; i < ir->type->vector_elements; i++) {
+	 values[i] = ir->value.b[i];
+      }
+      break;
+   default:
+      assert(!"Non-float/uint/int/bool constant");
+   }
+
+   this->result = ir_to_mesa_src_reg(PROGRAM_CONSTANT, -1, ir->type);
+   this->result.index = _mesa_add_unnamed_constant(this->prog->Parameters,
+						   values,
+						   ir->type->vector_elements,
+						   &this->result.swizzle);
+}
+
+function_entry *
+ir_to_mesa_visitor::get_function_signature(ir_function_signature *sig)
+{
+   function_entry *entry;
+
+   foreach_iter(exec_list_iterator, iter, this->function_signatures) {
+      entry = (function_entry *)iter.get();
+
+      if (entry->sig == sig)
+	 return entry;
+   }
+
+   entry = ralloc(mem_ctx, function_entry);
+   entry->sig = sig;
+   entry->sig_id = this->next_signature_id++;
+   entry->bgn_inst = NULL;
+
+   /* Allocate storage for all the parameters. */
+   foreach_iter(exec_list_iterator, iter, sig->parameters) {
+      ir_variable *param = (ir_variable *)iter.get();
+      variable_storage *storage;
+
+      storage = find_variable_storage(param);
+      assert(!storage);
+
+      storage = new(mem_ctx) variable_storage(param, PROGRAM_TEMPORARY,
+					      this->next_temp);
+      this->variables.push_tail(storage);
+
+      this->next_temp += type_size(param->type);
+   }
+
+   if (!sig->return_type->is_void()) {
+      entry->return_reg = get_temp(sig->return_type);
+   } else {
+      entry->return_reg = ir_to_mesa_undef;
+   }
+
+   this->function_signatures.push_tail(entry);
+   return entry;
+}
+
+void
+ir_to_mesa_visitor::visit(ir_call *ir)
+{
+   ir_to_mesa_instruction *call_inst;
+   ir_function_signature *sig = ir->get_callee();
+   function_entry *entry = get_function_signature(sig);
+   int i;
+
+   /* Process in parameters. */
+   exec_list_iterator sig_iter = sig->parameters.iterator();
+   foreach_iter(exec_list_iterator, iter, *ir) {
+      ir_rvalue *param_rval = (ir_rvalue *)iter.get();
+      ir_variable *param = (ir_variable *)sig_iter.get();
+
+      if (param->mode == ir_var_in ||
+	  param->mode == ir_var_inout) {
+	 variable_storage *storage = find_variable_storage(param);
+	 assert(storage);
+
+	 param_rval->accept(this);
+	 ir_to_mesa_src_reg r = this->result;
+
+	 ir_to_mesa_dst_reg l;
+	 l.file = storage->file;
+	 l.index = storage->index;
+	 l.reladdr = NULL;
+	 l.writemask = WRITEMASK_XYZW;
+	 l.cond_mask = COND_TR;
+
+	 for (i = 0; i < type_size(param->type); i++) {
+	    ir_to_mesa_emit_op1(ir, OPCODE_MOV, l, r);
+	    l.index++;
+	    r.index++;
+	 }
+      }
+
+      sig_iter.next();
+   }
+   assert(!sig_iter.has_next());
+
+   /* Emit call instruction */
+   call_inst = ir_to_mesa_emit_op1(ir, OPCODE_CAL,
+				   ir_to_mesa_undef_dst, ir_to_mesa_undef);
+   call_inst->function = entry;
+
+   /* Process out parameters. */
+   sig_iter = sig->parameters.iterator();
+   foreach_iter(exec_list_iterator, iter, *ir) {
+      ir_rvalue *param_rval = (ir_rvalue *)iter.get();
+      ir_variable *param = (ir_variable *)sig_iter.get();
+
+      if (param->mode == ir_var_out ||
+	  param->mode == ir_var_inout) {
+	 variable_storage *storage = find_variable_storage(param);
+	 assert(storage);
+
+	 ir_to_mesa_src_reg r;
+	 r.file = storage->file;
+	 r.index = storage->index;
+	 r.reladdr = NULL;
+	 r.swizzle = SWIZZLE_NOOP;
+	 r.negate = 0;
+
+	 param_rval->accept(this);
+	 ir_to_mesa_dst_reg l = ir_to_mesa_dst_reg_from_src(this->result);
+
+	 for (i = 0; i < type_size(param->type); i++) {
+	    ir_to_mesa_emit_op1(ir, OPCODE_MOV, l, r);
+	    l.index++;
+	    r.index++;
+	 }
+      }
+
+      sig_iter.next();
+   }
+   assert(!sig_iter.has_next());
+
+   /* Process return value. */
+   this->result = entry->return_reg;
+}
+
+void
+ir_to_mesa_visitor::visit(ir_texture *ir)
+{
+   ir_to_mesa_src_reg result_src, coord, lod_info, projector;
+   ir_to_mesa_dst_reg result_dst, coord_dst;
+   ir_to_mesa_instruction *inst = NULL;
+   prog_opcode opcode = OPCODE_NOP;
+
+   ir->coordinate->accept(this);
+
+   /* Put our coords in a temp.  We'll need to modify them for shadow,
+    * projection, or LOD, so the only case we'd use it as is is if
+    * we're doing plain old texturing.  Mesa IR optimization should
+    * handle cleaning up our mess in that case.
+    */
+   coord = get_temp(glsl_type::vec4_type);
+   coord_dst = ir_to_mesa_dst_reg_from_src(coord);
+   ir_to_mesa_emit_op1(ir, OPCODE_MOV, coord_dst,
+		       this->result);
+
+   if (ir->projector) {
+      ir->projector->accept(this);
+      projector = this->result;
+   }
+
+   /* Storage for our result.  Ideally for an assignment we'd be using
+    * the actual storage for the result here, instead.
+    */
+   result_src = get_temp(glsl_type::vec4_type);
+   result_dst = ir_to_mesa_dst_reg_from_src(result_src);
+
+   switch (ir->op) {
+   case ir_tex:
+      opcode = OPCODE_TEX;
+      break;
+   case ir_txb:
+      opcode = OPCODE_TXB;
+      ir->lod_info.bias->accept(this);
+      lod_info = this->result;
+      break;
+   case ir_txl:
+      opcode = OPCODE_TXL;
+      ir->lod_info.lod->accept(this);
+      lod_info = this->result;
+      break;
+   case ir_txd:
+   case ir_txf:
+      assert(!"GLSL 1.30 features unsupported");
+      break;
+   }
+
+   if (ir->projector) {
+      if (opcode == OPCODE_TEX) {
+	 /* Slot the projector in as the last component of the coord. */
+	 coord_dst.writemask = WRITEMASK_W;
+	 ir_to_mesa_emit_op1(ir, OPCODE_MOV, coord_dst, projector);
+	 coord_dst.writemask = WRITEMASK_XYZW;
+	 opcode = OPCODE_TXP;
+      } else {
+	 ir_to_mesa_src_reg coord_w = coord;
+	 coord_w.swizzle = SWIZZLE_WWWW;
+
+	 /* For the other TEX opcodes there's no projective version
+	  * since the last slot is taken up by lod info.  Do the
+	  * projective divide now.
+	  */
+	 coord_dst.writemask = WRITEMASK_W;
+	 ir_to_mesa_emit_op1(ir, OPCODE_RCP, coord_dst, projector);
+
+	 coord_dst.writemask = WRITEMASK_XYZ;
+	 ir_to_mesa_emit_op2(ir, OPCODE_MUL, coord_dst, coord, coord_w);
+
+	 coord_dst.writemask = WRITEMASK_XYZW;
+	 coord.swizzle = SWIZZLE_XYZW;
+      }
+   }
+
+   if (ir->shadow_comparitor) {
+      /* Slot the shadow value in as the second to last component of the
+       * coord.
+       */
+      ir->shadow_comparitor->accept(this);
+      coord_dst.writemask = WRITEMASK_Z;
+      ir_to_mesa_emit_op1(ir, OPCODE_MOV, coord_dst, this->result);
+      coord_dst.writemask = WRITEMASK_XYZW;
+   }
+
+   if (opcode == OPCODE_TXL || opcode == OPCODE_TXB) {
+      /* Mesa IR stores lod or lod bias in the last channel of the coords. */
+      coord_dst.writemask = WRITEMASK_W;
+      ir_to_mesa_emit_op1(ir, OPCODE_MOV, coord_dst, lod_info);
+      coord_dst.writemask = WRITEMASK_XYZW;
+   }
+
+   inst = ir_to_mesa_emit_op1(ir, opcode, result_dst, coord);
+
+   if (ir->shadow_comparitor)
+      inst->tex_shadow = GL_TRUE;
+
+   inst->sampler = _mesa_get_sampler_uniform_value(ir->sampler,
+						   this->shader_program,
+						   this->prog);
+
+   const glsl_type *sampler_type = ir->sampler->type;
+
+   switch (sampler_type->sampler_dimensionality) {
+   case GLSL_SAMPLER_DIM_1D:
+      inst->tex_target = (sampler_type->sampler_array)
+	 ? TEXTURE_1D_ARRAY_INDEX : TEXTURE_1D_INDEX;
+      break;
+   case GLSL_SAMPLER_DIM_2D:
+      inst->tex_target = (sampler_type->sampler_array)
+	 ? TEXTURE_2D_ARRAY_INDEX : TEXTURE_2D_INDEX;
+      break;
+   case GLSL_SAMPLER_DIM_3D:
+      inst->tex_target = TEXTURE_3D_INDEX;
+      break;
+   case GLSL_SAMPLER_DIM_CUBE:
+      inst->tex_target = TEXTURE_CUBE_INDEX;
+      break;
+   case GLSL_SAMPLER_DIM_RECT:
+      inst->tex_target = TEXTURE_RECT_INDEX;
+      break;
+   case GLSL_SAMPLER_DIM_BUF:
+      assert(!"FINISHME: Implement ARB_texture_buffer_object");
+      break;
+   default:
+      assert(!"Should not get here.");
+   }
+
+   this->result = result_src;
+}
+
+void
+ir_to_mesa_visitor::visit(ir_return *ir)
+{
+   if (ir->get_value()) {
+      ir_to_mesa_dst_reg l;
+      int i;
+
+      assert(current_function);
+
+      ir->get_value()->accept(this);
+      ir_to_mesa_src_reg r = this->result;
+
+      l = ir_to_mesa_dst_reg_from_src(current_function->return_reg);
+
+      for (i = 0; i < type_size(current_function->sig->return_type); i++) {
+	 ir_to_mesa_emit_op1(ir, OPCODE_MOV, l, r);
+	 l.index++;
+	 r.index++;
+      }
+   }
+
+   ir_to_mesa_emit_op0(ir, OPCODE_RET);
+}
+
+void
+ir_to_mesa_visitor::visit(ir_discard *ir)
+{
+   struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog;
+
+   if (ir->condition) {
+      ir->condition->accept(this);
+      this->result.negate = ~this->result.negate;
+      ir_to_mesa_emit_op1(ir, OPCODE_KIL, ir_to_mesa_undef_dst, this->result);
+   } else {
+      ir_to_mesa_emit_op0(ir, OPCODE_KIL_NV);
+   }
+
+   fp->UsesKill = GL_TRUE;
+}
+
+void
+ir_to_mesa_visitor::visit(ir_if *ir)
+{
+   ir_to_mesa_instruction *cond_inst, *if_inst, *else_inst = NULL;
+   ir_to_mesa_instruction *prev_inst;
+
+   prev_inst = (ir_to_mesa_instruction *)this->instructions.get_tail();
+
+   ir->condition->accept(this);
+   assert(this->result.file != PROGRAM_UNDEFINED);
+
+   if (this->options->EmitCondCodes) {
+      cond_inst = (ir_to_mesa_instruction *)this->instructions.get_tail();
+
+      /* See if we actually generated any instruction for generating
+       * the condition.  If not, then cook up a move to a temp so we
+       * have something to set cond_update on.
+       */
+      if (cond_inst == prev_inst) {
+	 ir_to_mesa_src_reg temp = get_temp(glsl_type::bool_type);
+	 cond_inst = ir_to_mesa_emit_op1(ir->condition, OPCODE_MOV,
+					 ir_to_mesa_dst_reg_from_src(temp),
+					 result);
+      }
+      cond_inst->cond_update = GL_TRUE;
+
+      if_inst = ir_to_mesa_emit_op0(ir->condition, OPCODE_IF);
+      if_inst->dst_reg.cond_mask = COND_NE;
+   } else {
+      if_inst = ir_to_mesa_emit_op1(ir->condition,
+				    OPCODE_IF, ir_to_mesa_undef_dst,
+				    this->result);
+   }
+
+   this->instructions.push_tail(if_inst);
+
+   visit_exec_list(&ir->then_instructions, this);
+
+   if (!ir->else_instructions.is_empty()) {
+      else_inst = ir_to_mesa_emit_op0(ir->condition, OPCODE_ELSE);
+      visit_exec_list(&ir->else_instructions, this);
+   }
+
+   if_inst = ir_to_mesa_emit_op1(ir->condition, OPCODE_ENDIF,
+				 ir_to_mesa_undef_dst, ir_to_mesa_undef);
+}
+
+ir_to_mesa_visitor::ir_to_mesa_visitor()
+{
+   result.file = PROGRAM_UNDEFINED;
+   next_temp = 1;
+   next_signature_id = 1;
+   current_function = NULL;
+   mem_ctx = ralloc_context(NULL);
+}
+
+ir_to_mesa_visitor::~ir_to_mesa_visitor()
+{
+   ralloc_free(mem_ctx);
+}
+
+static struct prog_src_register
+mesa_src_reg_from_ir_src_reg(ir_to_mesa_src_reg reg)
+{
+   struct prog_src_register mesa_reg;
+
+   mesa_reg.File = reg.file;
+   assert(reg.index < (1 << INST_INDEX_BITS));
+   mesa_reg.Index = reg.index;
+   mesa_reg.Swizzle = reg.swizzle;
+   mesa_reg.RelAddr = reg.reladdr != NULL;
+   mesa_reg.Negate = reg.negate;
+   mesa_reg.Abs = 0;
+   mesa_reg.HasIndex2 = GL_FALSE;
+   mesa_reg.RelAddr2 = 0;
+   mesa_reg.Index2 = 0;
+
+   return mesa_reg;
+}
+
+static void
+set_branchtargets(ir_to_mesa_visitor *v,
+		  struct prog_instruction *mesa_instructions,
+		  int num_instructions)
+{
+   int if_count = 0, loop_count = 0;
+   int *if_stack, *loop_stack;
+   int if_stack_pos = 0, loop_stack_pos = 0;
+   int i, j;
+
+   for (i = 0; i < num_instructions; i++) {
+      switch (mesa_instructions[i].Opcode) {
+      case OPCODE_IF:
+	 if_count++;
+	 break;
+      case OPCODE_BGNLOOP:
+	 loop_count++;
+	 break;
+      case OPCODE_BRK:
+      case OPCODE_CONT:
+	 mesa_instructions[i].BranchTarget = -1;
+	 break;
+      default:
+	 break;
+      }
+   }
+
+   if_stack = rzalloc_array(v->mem_ctx, int, if_count);
+   loop_stack = rzalloc_array(v->mem_ctx, int, loop_count);
+
+   for (i = 0; i < num_instructions; i++) {
+      switch (mesa_instructions[i].Opcode) {
+      case OPCODE_IF:
+	 if_stack[if_stack_pos] = i;
+	 if_stack_pos++;
+	 break;
+      case OPCODE_ELSE:
+	 mesa_instructions[if_stack[if_stack_pos - 1]].BranchTarget = i;
+	 if_stack[if_stack_pos - 1] = i;
+	 break;
+      case OPCODE_ENDIF:
+	 mesa_instructions[if_stack[if_stack_pos - 1]].BranchTarget = i;
+	 if_stack_pos--;
+	 break;
+      case OPCODE_BGNLOOP:
+	 loop_stack[loop_stack_pos] = i;
+	 loop_stack_pos++;
+	 break;
+      case OPCODE_ENDLOOP:
+	 loop_stack_pos--;
+	 /* Rewrite any breaks/conts at this nesting level (haven't
+	  * already had a BranchTarget assigned) to point to the end
+	  * of the loop.
+	  */
+	 for (j = loop_stack[loop_stack_pos]; j < i; j++) {
+	    if (mesa_instructions[j].Opcode == OPCODE_BRK ||
+		mesa_instructions[j].Opcode == OPCODE_CONT) {
+	       if (mesa_instructions[j].BranchTarget == -1) {
+		  mesa_instructions[j].BranchTarget = i;
+	       }
+	    }
+	 }
+	 /* The loop ends point at each other. */
+	 mesa_instructions[i].BranchTarget = loop_stack[loop_stack_pos];
+	 mesa_instructions[loop_stack[loop_stack_pos]].BranchTarget = i;
+	 break;
+      case OPCODE_CAL:
+	 foreach_iter(exec_list_iterator, iter, v->function_signatures) {
+	    function_entry *entry = (function_entry *)iter.get();
+
+	    if (entry->sig_id == mesa_instructions[i].BranchTarget) {
+	       mesa_instructions[i].BranchTarget = entry->inst;
+	       break;
+	    }
+	 }
+	 break;
+      default:
+	 break;
+      }
+   }
+}
+
+static void
+print_program(struct prog_instruction *mesa_instructions,
+	      ir_instruction **mesa_instruction_annotation,
+	      int num_instructions)
+{
+   ir_instruction *last_ir = NULL;
+   int i;
+   int indent = 0;
+
+   for (i = 0; i < num_instructions; i++) {
+      struct prog_instruction *mesa_inst = mesa_instructions + i;
+      ir_instruction *ir = mesa_instruction_annotation[i];
+
+      fprintf(stdout, "%3d: ", i);
+
+      if (last_ir != ir && ir) {
+	 int j;
+
+	 for (j = 0; j < indent; j++) {
+	    fprintf(stdout, " ");
+	 }
+	 ir->print();
+	 printf("\n");
+	 last_ir = ir;
+
+	 fprintf(stdout, "     "); /* line number spacing. */
+      }
+
+      indent = _mesa_fprint_instruction_opt(stdout, mesa_inst, indent,
+					    PROG_PRINT_DEBUG, NULL);
+   }
+}
+
+
+/**
+ * Count resources used by the given gpu program (number of texture
+ * samplers, etc).
+ */
+static void
+count_resources(struct gl_program *prog)
+{
+   unsigned int i;
+
+   prog->SamplersUsed = 0;
+
+   for (i = 0; i < prog->NumInstructions; i++) {
+      struct prog_instruction *inst = &prog->Instructions[i];
+
+      if (_mesa_is_tex_instruction(inst->Opcode)) {
+	 prog->SamplerTargets[inst->TexSrcUnit] =
+	    (gl_texture_index)inst->TexSrcTarget;
+	 prog->SamplersUsed |= 1 << inst->TexSrcUnit;
+	 if (inst->TexShadow) {
+	    prog->ShadowSamplers |= 1 << inst->TexSrcUnit;
+	 }
+      }
+   }
+
+   _mesa_update_shader_textures_used(prog);
+}
+
+
+/**
+ * Check if the given vertex/fragment/shader program is within the
+ * resource limits of the context (number of texture units, etc).
+ * If any of those checks fail, record a linker error.
+ *
+ * XXX more checks are needed...
+ */
+static void
+check_resources(const struct gl_context *ctx,
+                struct gl_shader_program *shader_program,
+                struct gl_program *prog)
+{
+   switch (prog->Target) {
+   case GL_VERTEX_PROGRAM_ARB:
+      if (_mesa_bitcount(prog->SamplersUsed) >
+          ctx->Const.MaxVertexTextureImageUnits) {
+         fail_link(shader_program, "Too many vertex shader texture samplers");
+      }
+      if (prog->Parameters->NumParameters > MAX_UNIFORMS) {
+         fail_link(shader_program, "Too many vertex shader constants");
+      }
+      break;
+   case MESA_GEOMETRY_PROGRAM:
+      if (_mesa_bitcount(prog->SamplersUsed) >
+          ctx->Const.MaxGeometryTextureImageUnits) {
+         fail_link(shader_program, "Too many geometry shader texture samplers");
+      }
+      if (prog->Parameters->NumParameters >
+          MAX_GEOMETRY_UNIFORM_COMPONENTS / 4) {
+         fail_link(shader_program, "Too many geometry shader constants");
+      }
+      break;
+   case GL_FRAGMENT_PROGRAM_ARB:
+      if (_mesa_bitcount(prog->SamplersUsed) >
+          ctx->Const.MaxTextureImageUnits) {
+         fail_link(shader_program, "Too many fragment shader texture samplers");
+      }
+      if (prog->Parameters->NumParameters > MAX_UNIFORMS) {
+         fail_link(shader_program, "Too many fragment shader constants");
+      }
+      break;
+   default:
+      _mesa_problem(ctx, "unexpected program type in check_resources()");
+   }
+}
+
+
+
+struct uniform_sort {
+   struct gl_uniform *u;
+   int pos;
+};
+
+/* The shader_program->Uniforms list is almost sorted in increasing
+ * uniform->{Frag,Vert}Pos locations, but not quite when there are
+ * uniforms shared between targets.  We need to add parameters in
+ * increasing order for the targets.
+ */
+static int
+sort_uniforms(const void *a, const void *b)
+{
+   struct uniform_sort *u1 = (struct uniform_sort *)a;
+   struct uniform_sort *u2 = (struct uniform_sort *)b;
+
+   return u1->pos - u2->pos;
+}
+
+/* Add the uniforms to the parameters.  The linker chose locations
+ * in our parameters lists (which weren't created yet), which the
+ * uniforms code will use to poke values into our parameters list
+ * when uniforms are updated.
+ */
+static void
+add_uniforms_to_parameters_list(struct gl_shader_program *shader_program,
+				struct gl_shader *shader,
+				struct gl_program *prog)
+{
+   unsigned int i;
+   unsigned int next_sampler = 0, num_uniforms = 0;
+   struct uniform_sort *sorted_uniforms;
+
+   sorted_uniforms = ralloc_array(NULL, struct uniform_sort,
+				  shader_program->Uniforms->NumUniforms);
+
+   for (i = 0; i < shader_program->Uniforms->NumUniforms; i++) {
+      struct gl_uniform *uniform = shader_program->Uniforms->Uniforms + i;
+      int parameter_index = -1;
+
+      switch (shader->Type) {
+      case GL_VERTEX_SHADER:
+	 parameter_index = uniform->VertPos;
+	 break;
+      case GL_FRAGMENT_SHADER:
+	 parameter_index = uniform->FragPos;
+	 break;
+      case GL_GEOMETRY_SHADER:
+	 parameter_index = uniform->GeomPos;
+	 break;
+      }
+
+      /* Only add uniforms used in our target. */
+      if (parameter_index != -1) {
+	 sorted_uniforms[num_uniforms].pos = parameter_index;
+	 sorted_uniforms[num_uniforms].u = uniform;
+	 num_uniforms++;
+      }
+   }
+
+   qsort(sorted_uniforms, num_uniforms, sizeof(struct uniform_sort),
+	 sort_uniforms);
+
+   for (i = 0; i < num_uniforms; i++) {
+      struct gl_uniform *uniform = sorted_uniforms[i].u;
+      int parameter_index = sorted_uniforms[i].pos;
+      const glsl_type *type = uniform->Type;
+      unsigned int size;
+
+      if (type->is_vector() ||
+	  type->is_scalar()) {
+	 size = type->vector_elements;
+      } else {
+	 size = type_size(type) * 4;
+      }
+
+      gl_register_file file;
+      if (type->is_sampler() ||
+	  (type->is_array() && type->fields.array->is_sampler())) {
+	 file = PROGRAM_SAMPLER;
+      } else {
+	 file = PROGRAM_UNIFORM;
+      }
+
+      GLint index = _mesa_lookup_parameter_index(prog->Parameters, -1,
+						 uniform->Name);
+
+      if (index < 0) {
+	 index = _mesa_add_parameter(prog->Parameters, file,
+				     uniform->Name, size, type->gl_type,
+				     NULL, NULL, 0x0);
+
+	 /* Sampler uniform values are stored in prog->SamplerUnits,
+	  * and the entry in that array is selected by this index we
+	  * store in ParameterValues[].
+	  */
+	 if (file == PROGRAM_SAMPLER) {
+	    for (unsigned int j = 0; j < size / 4; j++)
+	       prog->Parameters->ParameterValues[index + j][0] = next_sampler++;
+	 }
+
+	 /* The location chosen in the Parameters list here (returned
+	  * from _mesa_add_uniform) has to match what the linker chose.
+	  */
+	 if (index != parameter_index) {
+	    fail_link(shader_program, "Allocation of uniform `%s' to target "
+		      "failed (%d vs %d)\n",
+		      uniform->Name, index, parameter_index);
+	 }
+      }
+   }
+
+   ralloc_free(sorted_uniforms);
+}
+
+static void
+set_uniform_initializer(struct gl_context *ctx, void *mem_ctx,
+			struct gl_shader_program *shader_program,
+			const char *name, const glsl_type *type,
+			ir_constant *val)
+{
+   if (type->is_record()) {
+      ir_constant *field_constant;
+
+      field_constant = (ir_constant *)val->components.get_head();
+
+      for (unsigned int i = 0; i < type->length; i++) {
+	 const glsl_type *field_type = type->fields.structure[i].type;
+	 const char *field_name = ralloc_asprintf(mem_ctx, "%s.%s", name,
+					    type->fields.structure[i].name);
+	 set_uniform_initializer(ctx, mem_ctx, shader_program, field_name,
+				 field_type, field_constant);
+	 field_constant = (ir_constant *)field_constant->next;
+      }
+      return;
+   }
+
+   int loc = _mesa_get_uniform_location(ctx, shader_program, name);
+
+   if (loc == -1) {
+      fail_link(shader_program,
+		"Couldn't find uniform for initializer %s\n", name);
+      return;
+   }
+
+   for (unsigned int i = 0; i < (type->is_array() ? type->length : 1); i++) {
+      ir_constant *element;
+      const glsl_type *element_type;
+      if (type->is_array()) {
+	 element = val->array_elements[i];
+	 element_type = type->fields.array;
+      } else {
+	 element = val;
+	 element_type = type;
+      }
+
+      void *values;
+
+      if (element_type->base_type == GLSL_TYPE_BOOL) {
+	 int *conv = ralloc_array(mem_ctx, int, element_type->components());
+	 for (unsigned int j = 0; j < element_type->components(); j++) {
+	    conv[j] = element->value.b[j];
+	 }
+	 values = (void *)conv;
+	 element_type = glsl_type::get_instance(GLSL_TYPE_INT,
+						element_type->vector_elements,
+						1);
+      } else {
+	 values = &element->value;
+      }
+
+      if (element_type->is_matrix()) {
+	 _mesa_uniform_matrix(ctx, shader_program,
+			      element_type->matrix_columns,
+			      element_type->vector_elements,
+			      loc, 1, GL_FALSE, (GLfloat *)values);
+	 loc += element_type->matrix_columns;
+      } else {
+	 _mesa_uniform(ctx, shader_program, loc, element_type->matrix_columns,
+		       values, element_type->gl_type);
+	 loc += type_size(element_type);
+      }
+   }
+}
+
+static void
+set_uniform_initializers(struct gl_context *ctx,
+			 struct gl_shader_program *shader_program)
+{
+   void *mem_ctx = NULL;
+
+   for (unsigned int i = 0; i < MESA_SHADER_TYPES; i++) {
+      struct gl_shader *shader = shader_program->_LinkedShaders[i];
+
+      if (shader == NULL)
+	 continue;
+
+      foreach_iter(exec_list_iterator, iter, *shader->ir) {
+	 ir_instruction *ir = (ir_instruction *)iter.get();
+	 ir_variable *var = ir->as_variable();
+
+	 if (!var || var->mode != ir_var_uniform || !var->constant_value)
+	    continue;
+
+	 if (!mem_ctx)
+	    mem_ctx = ralloc_context(NULL);
+
+	 set_uniform_initializer(ctx, mem_ctx, shader_program, var->name,
+				 var->type, var->constant_value);
+      }
+   }
+
+   ralloc_free(mem_ctx);
+}
+
+/*
+ * On a basic block basis, tracks available PROGRAM_TEMPORARY register
+ * channels for copy propagation and updates following instructions to
+ * use the original versions.
+ *
+ * The ir_to_mesa_visitor lazily produces code assuming that this pass
+ * will occur.  As an example, a TXP production before this pass:
+ *
+ * 0: MOV TEMP[1], INPUT[4].xyyy;
+ * 1: MOV TEMP[1].w, INPUT[4].wwww;
+ * 2: TXP TEMP[2], TEMP[1], texture[0], 2D;
+ *
+ * and after:
+ *
+ * 0: MOV TEMP[1], INPUT[4].xyyy;
+ * 1: MOV TEMP[1].w, INPUT[4].wwww;
+ * 2: TXP TEMP[2], INPUT[4].xyyw, texture[0], 2D;
+ *
+ * which allows for dead code elimination on TEMP[1]'s writes.
+ */
+void
+ir_to_mesa_visitor::copy_propagate(void)
+{
+   ir_to_mesa_instruction **acp = rzalloc_array(mem_ctx,
+						    ir_to_mesa_instruction *,
+						    this->next_temp * 4);
+   int *acp_level = rzalloc_array(mem_ctx, int, this->next_temp * 4);
+   int level = 0;
+
+   foreach_iter(exec_list_iterator, iter, this->instructions) {
+      ir_to_mesa_instruction *inst = (ir_to_mesa_instruction *)iter.get();
+
+      assert(inst->dst_reg.file != PROGRAM_TEMPORARY
+	     || inst->dst_reg.index < this->next_temp);
+
+      /* First, do any copy propagation possible into the src regs. */
+      for (int r = 0; r < 3; r++) {
+	 ir_to_mesa_instruction *first = NULL;
+	 bool good = true;
+	 int acp_base = inst->src_reg[r].index * 4;
+
+	 if (inst->src_reg[r].file != PROGRAM_TEMPORARY ||
+	     inst->src_reg[r].reladdr)
+	    continue;
+
+	 /* See if we can find entries in the ACP consisting of MOVs
+	  * from the same src register for all the swizzled channels
+	  * of this src register reference.
+	  */
+	 for (int i = 0; i < 4; i++) {
+	    int src_chan = GET_SWZ(inst->src_reg[r].swizzle, i);
+	    ir_to_mesa_instruction *copy_chan = acp[acp_base + src_chan];
+
+	    if (!copy_chan) {
+	       good = false;
+	       break;
+	    }
+
+	    assert(acp_level[acp_base + src_chan] <= level);
+
+	    if (!first) {
+	       first = copy_chan;
+	    } else {
+	       if (first->src_reg[0].file != copy_chan->src_reg[0].file ||
+		   first->src_reg[0].index != copy_chan->src_reg[0].index) {
+		  good = false;
+		  break;
+	       }
+	    }
+	 }
+
+	 if (good) {
+	    /* We've now validated that we can copy-propagate to
+	     * replace this src register reference.  Do it.
+	     */
+	    inst->src_reg[r].file = first->src_reg[0].file;
+	    inst->src_reg[r].index = first->src_reg[0].index;
+
+	    int swizzle = 0;
+	    for (int i = 0; i < 4; i++) {
+	       int src_chan = GET_SWZ(inst->src_reg[r].swizzle, i);
+	       ir_to_mesa_instruction *copy_inst = acp[acp_base + src_chan];
+	       swizzle |= (GET_SWZ(copy_inst->src_reg[0].swizzle, src_chan) <<
+			   (3 * i));
+	    }
+	    inst->src_reg[r].swizzle = swizzle;
+	 }
+      }
+
+      switch (inst->op) {
+      case OPCODE_BGNLOOP:
+      case OPCODE_ENDLOOP:
+	 /* End of a basic block, clear the ACP entirely. */
+	 memset(acp, 0, sizeof(*acp) * this->next_temp * 4);
+	 break;
+
+      case OPCODE_IF:
+	 ++level;
+	 break;
+
+      case OPCODE_ENDIF:
+      case OPCODE_ELSE:
+	 /* Clear all channels written inside the block from the ACP, but
+	  * leaving those that were not touched.
+	  */
+	 for (int r = 0; r < this->next_temp; r++) {
+	    for (int c = 0; c < 4; c++) {
+	       if (!acp[4 * r + c])
+		  continue;
+
+	       if (acp_level[4 * r + c] >= level)
+		  acp[4 * r + c] = NULL;
+	    }
+	 }
+	 if (inst->op == OPCODE_ENDIF)
+	    --level;
+	 break;
+
+      default:
+	 /* Continuing the block, clear any written channels from
+	  * the ACP.
+	  */
+	 if (inst->dst_reg.file == PROGRAM_TEMPORARY && inst->dst_reg.reladdr) {
+	    /* Any temporary might be written, so no copy propagation
+	     * across this instruction.
+	     */
+	    memset(acp, 0, sizeof(*acp) * this->next_temp * 4);
+	 } else if (inst->dst_reg.file == PROGRAM_OUTPUT &&
+		    inst->dst_reg.reladdr) {
+	    /* Any output might be written, so no copy propagation
+	     * from outputs across this instruction.
+	     */
+	    for (int r = 0; r < this->next_temp; r++) {
+	       for (int c = 0; c < 4; c++) {
+		  if (!acp[4 * r + c])
+		     continue;
+
+		  if (acp[4 * r + c]->src_reg[0].file == PROGRAM_OUTPUT)
+		     acp[4 * r + c] = NULL;
+	       }
+	    }
+	 } else if (inst->dst_reg.file == PROGRAM_TEMPORARY ||
+		    inst->dst_reg.file == PROGRAM_OUTPUT) {
+	    /* Clear where it's used as dst. */
+	    if (inst->dst_reg.file == PROGRAM_TEMPORARY) {
+	       for (int c = 0; c < 4; c++) {
+		  if (inst->dst_reg.writemask & (1 << c)) {
+		     acp[4 * inst->dst_reg.index + c] = NULL;
+		  }
+	       }
+	    }
+
+	    /* Clear where it's used as src. */
+	    for (int r = 0; r < this->next_temp; r++) {
+	       for (int c = 0; c < 4; c++) {
+		  if (!acp[4 * r + c])
+		     continue;
+
+		  int src_chan = GET_SWZ(acp[4 * r + c]->src_reg[0].swizzle, c);
+
+		  if (acp[4 * r + c]->src_reg[0].file == inst->dst_reg.file &&
+		      acp[4 * r + c]->src_reg[0].index == inst->dst_reg.index &&
+		      inst->dst_reg.writemask & (1 << src_chan))
+		  {
+		     acp[4 * r + c] = NULL;
+		  }
+	       }
+	    }
+	 }
+	 break;
+      }
+
+      /* If this is a copy, add it to the ACP. */
+      if (inst->op == OPCODE_MOV &&
+	  inst->dst_reg.file == PROGRAM_TEMPORARY &&
+	  !inst->dst_reg.reladdr &&
+	  !inst->saturate &&
+	  !inst->src_reg[0].reladdr &&
+	  !inst->src_reg[0].negate) {
+	 for (int i = 0; i < 4; i++) {
+	    if (inst->dst_reg.writemask & (1 << i)) {
+	       acp[4 * inst->dst_reg.index + i] = inst;
+	       acp_level[4 * inst->dst_reg.index + i] = level;
+	    }
+	 }
+      }
+   }
+
+   ralloc_free(acp_level);
+   ralloc_free(acp);
+}
+
+
+/**
+ * Convert a shader's GLSL IR into a Mesa gl_program.
+ */
+static struct gl_program *
+get_mesa_program(struct gl_context *ctx,
+                 struct gl_shader_program *shader_program,
+		 struct gl_shader *shader)
+{
+   ir_to_mesa_visitor v;
+   struct prog_instruction *mesa_instructions, *mesa_inst;
+   ir_instruction **mesa_instruction_annotation;
+   int i;
+   struct gl_program *prog;
+   GLenum target;
+   const char *target_string;
+   GLboolean progress;
+   struct gl_shader_compiler_options *options =
+         &ctx->ShaderCompilerOptions[_mesa_shader_type_to_index(shader->Type)];
+
+   switch (shader->Type) {
+   case GL_VERTEX_SHADER:
+      target = GL_VERTEX_PROGRAM_ARB;
+      target_string = "vertex";
+      break;
+   case GL_FRAGMENT_SHADER:
+      target = GL_FRAGMENT_PROGRAM_ARB;
+      target_string = "fragment";
+      break;
+   case GL_GEOMETRY_SHADER:
+      target = GL_GEOMETRY_PROGRAM_NV;
+      target_string = "geometry";
+      break;
+   default:
+      assert(!"should not be reached");
+      return NULL;
+   }
+
+   validate_ir_tree(shader->ir);
+
+   prog = ctx->Driver.NewProgram(ctx, target, shader_program->Name);
+   if (!prog)
+      return NULL;
+   prog->Parameters = _mesa_new_parameter_list();
+   prog->Varying = _mesa_new_parameter_list();
+   prog->Attributes = _mesa_new_parameter_list();
+   v.ctx = ctx;
+   v.prog = prog;
+   v.shader_program = shader_program;
+   v.options = options;
+
+   add_uniforms_to_parameters_list(shader_program, shader, prog);
+
+   /* Emit Mesa IR for main(). */
+   visit_exec_list(shader->ir, &v);
+   v.ir_to_mesa_emit_op0(NULL, OPCODE_END);
+
+   /* Now emit bodies for any functions that were used. */
+   do {
+      progress = GL_FALSE;
+
+      foreach_iter(exec_list_iterator, iter, v.function_signatures) {
+	 function_entry *entry = (function_entry *)iter.get();
+
+	 if (!entry->bgn_inst) {
+	    v.current_function = entry;
+
+	    entry->bgn_inst = v.ir_to_mesa_emit_op0(NULL, OPCODE_BGNSUB);
+	    entry->bgn_inst->function = entry;
+
+	    visit_exec_list(&entry->sig->body, &v);
+
+	    ir_to_mesa_instruction *last;
+	    last = (ir_to_mesa_instruction *)v.instructions.get_tail();
+	    if (last->op != OPCODE_RET)
+	       v.ir_to_mesa_emit_op0(NULL, OPCODE_RET);
+
+	    ir_to_mesa_instruction *end;
+	    end = v.ir_to_mesa_emit_op0(NULL, OPCODE_ENDSUB);
+	    end->function = entry;
+
+	    progress = GL_TRUE;
+	 }
+      }
+   } while (progress);
+
+   prog->NumTemporaries = v.next_temp;
+
+   int num_instructions = 0;
+   foreach_iter(exec_list_iterator, iter, v.instructions) {
+      num_instructions++;
+   }
+
+   mesa_instructions =
+      (struct prog_instruction *)calloc(num_instructions,
+					sizeof(*mesa_instructions));
+   mesa_instruction_annotation = ralloc_array(v.mem_ctx, ir_instruction *,
+					      num_instructions);
+
+   v.copy_propagate();
+
+   /* Convert ir_mesa_instructions into prog_instructions.
+    */
+   mesa_inst = mesa_instructions;
+   i = 0;
+   foreach_iter(exec_list_iterator, iter, v.instructions) {
+      const ir_to_mesa_instruction *inst = (ir_to_mesa_instruction *)iter.get();
+
+      mesa_inst->Opcode = inst->op;
+      mesa_inst->CondUpdate = inst->cond_update;
+      if (inst->saturate)
+	 mesa_inst->SaturateMode = SATURATE_ZERO_ONE;
+      mesa_inst->DstReg.File = inst->dst_reg.file;
+      mesa_inst->DstReg.Index = inst->dst_reg.index;
+      mesa_inst->DstReg.CondMask = inst->dst_reg.cond_mask;
+      mesa_inst->DstReg.WriteMask = inst->dst_reg.writemask;
+      mesa_inst->DstReg.RelAddr = inst->dst_reg.reladdr != NULL;
+      mesa_inst->SrcReg[0] = mesa_src_reg_from_ir_src_reg(inst->src_reg[0]);
+      mesa_inst->SrcReg[1] = mesa_src_reg_from_ir_src_reg(inst->src_reg[1]);
+      mesa_inst->SrcReg[2] = mesa_src_reg_from_ir_src_reg(inst->src_reg[2]);
+      mesa_inst->TexSrcUnit = inst->sampler;
+      mesa_inst->TexSrcTarget = inst->tex_target;
+      mesa_inst->TexShadow = inst->tex_shadow;
+      mesa_instruction_annotation[i] = inst->ir;
+
+      /* Set IndirectRegisterFiles. */
+      if (mesa_inst->DstReg.RelAddr)
+         prog->IndirectRegisterFiles |= 1 << mesa_inst->DstReg.File;
+
+      /* Update program's bitmask of indirectly accessed register files */
+      for (unsigned src = 0; src < 3; src++)
+         if (mesa_inst->SrcReg[src].RelAddr)
+            prog->IndirectRegisterFiles |= 1 << mesa_inst->SrcReg[src].File;
+
+      if (options->EmitNoIfs && mesa_inst->Opcode == OPCODE_IF) {
+	 fail_link(shader_program, "Couldn't flatten if statement\n");
+      }
+
+      switch (mesa_inst->Opcode) {
+      case OPCODE_BGNSUB:
+	 inst->function->inst = i;
+	 mesa_inst->Comment = strdup(inst->function->sig->function_name());
+	 break;
+      case OPCODE_ENDSUB:
+	 mesa_inst->Comment = strdup(inst->function->sig->function_name());
+	 break;
+      case OPCODE_CAL:
+	 mesa_inst->BranchTarget = inst->function->sig_id; /* rewritten later */
+	 break;
+      case OPCODE_ARL:
+	 prog->NumAddressRegs = 1;
+	 break;
+      default:
+	 break;
+      }
+
+      mesa_inst++;
+      i++;
+
+      if (!shader_program->LinkStatus)
+         break;
+   }
+
+   if (!shader_program->LinkStatus) {
+      free(mesa_instructions);
+      _mesa_reference_program(ctx, &shader->Program, NULL);
+      return NULL;
+   }
+
+   set_branchtargets(&v, mesa_instructions, num_instructions);
+
+   if (ctx->Shader.Flags & GLSL_DUMP) {
+      printf("\n");
+      printf("GLSL IR for linked %s program %d:\n", target_string,
+	     shader_program->Name);
+      _mesa_print_ir(shader->ir, NULL);
+      printf("\n");
+      printf("\n");
+      printf("Mesa IR for linked %s program %d:\n", target_string,
+	     shader_program->Name);
+      print_program(mesa_instructions, mesa_instruction_annotation,
+		    num_instructions);
+   }
+
+   prog->Instructions = mesa_instructions;
+   prog->NumInstructions = num_instructions;
+
+   do_set_program_inouts(shader->ir, prog);
+   count_resources(prog);
+
+   check_resources(ctx, shader_program, prog);
+
+   _mesa_reference_program(ctx, &shader->Program, prog);
+
+   if ((ctx->Shader.Flags & GLSL_NO_OPT) == 0) {
+      _mesa_optimize_program(ctx, prog);
+   }
+
+   return prog;
+}
+
+extern "C" {
+
+/**
+ * Link a shader.
+ * Called via ctx->Driver.LinkShader()
+ * This actually involves converting GLSL IR into Mesa gl_programs with
+ * code lowering and other optimizations.
+ */
+GLboolean
+_mesa_ir_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
+{
+   assert(prog->LinkStatus);
+
+   for (unsigned i = 0; i < MESA_SHADER_TYPES; i++) {
+      if (prog->_LinkedShaders[i] == NULL)
+	 continue;
+
+      bool progress;
+      exec_list *ir = prog->_LinkedShaders[i]->ir;
+      const struct gl_shader_compiler_options *options =
+            &ctx->ShaderCompilerOptions[_mesa_shader_type_to_index(prog->_LinkedShaders[i]->Type)];
+
+      do {
+	 progress = false;
+
+	 /* Lowering */
+	 do_mat_op_to_vec(ir);
+	 lower_instructions(ir, (MOD_TO_FRACT | DIV_TO_MUL_RCP | EXP_TO_EXP2
+				 | LOG_TO_LOG2
+				 | ((options->EmitNoPow) ? POW_TO_EXP2 : 0)));
+
+	 progress = do_lower_jumps(ir, true, true, options->EmitNoMainReturn, options->EmitNoCont, options->EmitNoLoops) || progress;
+
+	 progress = do_common_optimization(ir, true, options->MaxUnrollIterations) || progress;
+
+	 progress = lower_quadop_vector(ir, true) || progress;
+
+	 if (options->EmitNoIfs) {
+	    progress = lower_discard(ir) || progress;
+	    progress = lower_if_to_cond_assign(ir) || progress;
+	 }
+
+	 if (options->EmitNoNoise)
+	    progress = lower_noise(ir) || progress;
+
+	 /* If there are forms of indirect addressing that the driver
+	  * cannot handle, perform the lowering pass.
+	  */
+	 if (options->EmitNoIndirectInput || options->EmitNoIndirectOutput
+	     || options->EmitNoIndirectTemp || options->EmitNoIndirectUniform)
+	   progress =
+	     lower_variable_index_to_cond_assign(ir,
+						 options->EmitNoIndirectInput,
+						 options->EmitNoIndirectOutput,
+						 options->EmitNoIndirectTemp,
+						 options->EmitNoIndirectUniform)
+	     || progress;
+
+	 progress = do_vec_index_to_cond_assign(ir) || progress;
+      } while (progress);
+
+      validate_ir_tree(ir);
+   }
+
+   for (unsigned i = 0; i < MESA_SHADER_TYPES; i++) {
+      struct gl_program *linked_prog;
+
+      if (prog->_LinkedShaders[i] == NULL)
+	 continue;
+
+      linked_prog = get_mesa_program(ctx, prog, prog->_LinkedShaders[i]);
+
+      if (linked_prog) {
+         bool ok = true;
+
+         switch (prog->_LinkedShaders[i]->Type) {
+         case GL_VERTEX_SHADER:
+            _mesa_reference_vertprog(ctx, &prog->VertexProgram,
+                                     (struct gl_vertex_program *)linked_prog);
+            ok = ctx->Driver.ProgramStringNotify(ctx, GL_VERTEX_PROGRAM_ARB,
+                                                 linked_prog);
+            break;
+         case GL_FRAGMENT_SHADER:
+            _mesa_reference_fragprog(ctx, &prog->FragmentProgram,
+                                     (struct gl_fragment_program *)linked_prog);
+            ok = ctx->Driver.ProgramStringNotify(ctx, GL_FRAGMENT_PROGRAM_ARB,
+                                                 linked_prog);
+            break;
+         case GL_GEOMETRY_SHADER:
+            _mesa_reference_geomprog(ctx, &prog->GeometryProgram,
+                                     (struct gl_geometry_program *)linked_prog);
+            ok = ctx->Driver.ProgramStringNotify(ctx, GL_GEOMETRY_PROGRAM_NV,
+                                                 linked_prog);
+            break;
+         }
+         if (!ok) {
+            return GL_FALSE;
+         }
+      }
+
+      _mesa_reference_program(ctx, &linked_prog, NULL);
+   }
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Compile a GLSL shader.  Called via glCompileShader().
+ */
+void
+_mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader)
+{
+   struct _mesa_glsl_parse_state *state =
+      new(shader) _mesa_glsl_parse_state(ctx, shader->Type, shader);
+
+   const char *source = shader->Source;
+   /* Check if the user called glCompileShader without first calling
+    * glShaderSource.  This should fail to compile, but not raise a GL_ERROR.
+    */
+   if (source == NULL) {
+      shader->CompileStatus = GL_FALSE;
+      return;
+   }
+
+   state->error = preprocess(state, &source, &state->info_log,
+			     &ctx->Extensions, ctx->API);
+
+   if (ctx->Shader.Flags & GLSL_DUMP) {
+      printf("GLSL source for shader %d:\n", shader->Name);
+      printf("%s\n", shader->Source);
+   }
+
+   if (!state->error) {
+     _mesa_glsl_lexer_ctor(state, source);
+     _mesa_glsl_parse(state);
+     _mesa_glsl_lexer_dtor(state);
+   }
+
+   ralloc_free(shader->ir);
+   shader->ir = new(shader) exec_list;
+   if (!state->error && !state->translation_unit.is_empty())
+      _mesa_ast_to_hir(shader->ir, state);
+
+   if (!state->error && !shader->ir->is_empty()) {
+      validate_ir_tree(shader->ir);
+
+      /* Do some optimization at compile time to reduce shader IR size
+       * and reduce later work if the same shader is linked multiple times
+       */
+      while (do_common_optimization(shader->ir, false, 32))
+	 ;
+
+      validate_ir_tree(shader->ir);
+   }
+
+   shader->symbols = state->symbols;
+
+   shader->CompileStatus = !state->error;
+   shader->InfoLog = state->info_log;
+   shader->Version = state->language_version;
+   memcpy(shader->builtins_to_link, state->builtins_to_link,
+	  sizeof(shader->builtins_to_link[0]) * state->num_builtins_to_link);
+   shader->num_builtins_to_link = state->num_builtins_to_link;
+
+   if (ctx->Shader.Flags & GLSL_LOG) {
+      _mesa_write_shader_to_file(shader);
+   }
+
+   if (ctx->Shader.Flags & GLSL_DUMP) {
+      if (shader->CompileStatus) {
+	 printf("GLSL IR for shader %d:\n", shader->Name);
+	 _mesa_print_ir(shader->ir, NULL);
+	 printf("\n\n");
+      } else {
+	 printf("GLSL shader %d failed to compile.\n", shader->Name);
+      }
+      if (shader->InfoLog && shader->InfoLog[0] != 0) {
+	 printf("GLSL shader %d info log:\n", shader->Name);
+	 printf("%s\n", shader->InfoLog);
+      }
+   }
+
+   /* Retain any live IR, but trash the rest. */
+   reparent_ir(shader->ir, shader->ir);
+
+   ralloc_free(state);
+}
+
+
+/**
+ * Link a GLSL shader program.  Called via glLinkProgram().
+ */
+void
+_mesa_glsl_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
+{
+   unsigned int i;
+
+   _mesa_clear_shader_program_data(ctx, prog);
+
+   prog->LinkStatus = GL_TRUE;
+
+   for (i = 0; i < prog->NumShaders; i++) {
+      if (!prog->Shaders[i]->CompileStatus) {
+	 fail_link(prog, "linking with uncompiled shader");
+	 prog->LinkStatus = GL_FALSE;
+      }
+   }
+
+   prog->Varying = _mesa_new_parameter_list();
+   _mesa_reference_vertprog(ctx, &prog->VertexProgram, NULL);
+   _mesa_reference_fragprog(ctx, &prog->FragmentProgram, NULL);
+   _mesa_reference_geomprog(ctx, &prog->GeometryProgram, NULL);
+
+   if (prog->LinkStatus) {
+      link_shaders(ctx, prog);
+   }
+
+   if (prog->LinkStatus) {
+      if (!ctx->Driver.LinkShader(ctx, prog)) {
+	 prog->LinkStatus = GL_FALSE;
+      }
+   }
+
+   set_uniform_initializers(ctx, prog);
+
+   if (ctx->Shader.Flags & GLSL_DUMP) {
+      if (!prog->LinkStatus) {
+	 printf("GLSL shader program %d failed to link\n", prog->Name);
+      }
+
+      if (prog->InfoLog && prog->InfoLog[0] != 0) {
+	 printf("GLSL shader program %d info log:\n", prog->Name);
+	 printf("%s\n", prog->InfoLog);
+      }
+   }
+}
+
+} /* extern "C" */
diff --git a/mesalib/src/mesa/program/prog_statevars.c b/mesalib/src/mesa/program/prog_statevars.c
index df3c76d18..384aa2cb2 100644
--- a/mesalib/src/mesa/program/prog_statevars.c
+++ b/mesalib/src/mesa/program/prog_statevars.c
@@ -1,1182 +1,1208 @@
-/*

- * Mesa 3-D graphics library

- * Version:  7.1

- *

- * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.

- *

- * 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 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

- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

- */

-

-/**

- * \file prog_statevars.c

- * Program state variable management.

- * \author Brian Paul

- */

-

-

-#include "main/glheader.h"

-#include "main/context.h"

-#include "main/imports.h"

-#include "main/macros.h"

-#include "main/mtypes.h"

-#include "prog_statevars.h"

-#include "prog_parameter.h"

-

-

-/**

- * Use the list of tokens in the state[] array to find global GL state

- * and return it in <value>.  Usually, four values are returned in <value>

- * but matrix queries may return as many as 16 values.

- * This function is used for ARB vertex/fragment programs.

- * The program parser will produce the state[] values.

- */

-static void

-_mesa_fetch_state(struct gl_context *ctx, const gl_state_index state[],

-                  GLfloat *value)

-{

-   switch (state[0]) {

-   case STATE_MATERIAL:

-      {

-         /* state[1] is either 0=front or 1=back side */

-         const GLuint face = (GLuint) state[1];

-         const struct gl_material *mat = &ctx->Light.Material;

-         ASSERT(face == 0 || face == 1);

-         /* we rely on tokens numbered so that _BACK_ == _FRONT_+ 1 */

-         ASSERT(MAT_ATTRIB_FRONT_AMBIENT + 1 == MAT_ATTRIB_BACK_AMBIENT);

-         /* XXX we could get rid of this switch entirely with a little

-          * work in arbprogparse.c's parse_state_single_item().

-          */

-         /* state[2] is the material attribute */

-         switch (state[2]) {

-         case STATE_AMBIENT:

-            COPY_4V(value, mat->Attrib[MAT_ATTRIB_FRONT_AMBIENT + face]);

-            return;

-         case STATE_DIFFUSE:

-            COPY_4V(value, mat->Attrib[MAT_ATTRIB_FRONT_DIFFUSE + face]);

-            return;

-         case STATE_SPECULAR:

-            COPY_4V(value, mat->Attrib[MAT_ATTRIB_FRONT_SPECULAR + face]);

-            return;

-         case STATE_EMISSION:

-            COPY_4V(value, mat->Attrib[MAT_ATTRIB_FRONT_EMISSION + face]);

-            return;

-         case STATE_SHININESS:

-            value[0] = mat->Attrib[MAT_ATTRIB_FRONT_SHININESS + face][0];

-            value[1] = 0.0F;

-            value[2] = 0.0F;

-            value[3] = 1.0F;

-            return;

-         default:

-            _mesa_problem(ctx, "Invalid material state in fetch_state");

-            return;

-         }

-      }

-   case STATE_LIGHT:

-      {

-         /* state[1] is the light number */

-         const GLuint ln = (GLuint) state[1];

-         /* state[2] is the light attribute */

-         switch (state[2]) {

-         case STATE_AMBIENT:

-            COPY_4V(value, ctx->Light.Light[ln].Ambient);

-            return;

-         case STATE_DIFFUSE:

-            COPY_4V(value, ctx->Light.Light[ln].Diffuse);

-            return;

-         case STATE_SPECULAR:

-            COPY_4V(value, ctx->Light.Light[ln].Specular);

-            return;

-         case STATE_POSITION:

-            COPY_4V(value, ctx->Light.Light[ln].EyePosition);

-            return;

-         case STATE_ATTENUATION:

-            value[0] = ctx->Light.Light[ln].ConstantAttenuation;

-            value[1] = ctx->Light.Light[ln].LinearAttenuation;

-            value[2] = ctx->Light.Light[ln].QuadraticAttenuation;

-            value[3] = ctx->Light.Light[ln].SpotExponent;

-            return;

-         case STATE_SPOT_DIRECTION:

-            COPY_3V(value, ctx->Light.Light[ln].SpotDirection);

-            value[3] = ctx->Light.Light[ln]._CosCutoff;

-            return;

-         case STATE_SPOT_CUTOFF:

-            value[0] = ctx->Light.Light[ln].SpotCutoff;

-            return;

-         case STATE_HALF_VECTOR:

-            {

-               static const GLfloat eye_z[] = {0, 0, 1};

-               GLfloat p[3];

-               /* Compute infinite half angle vector:

-                *   halfVector = normalize(normalize(lightPos) + (0, 0, 1))

-		* light.EyePosition.w should be 0 for infinite lights.

-                */

-               COPY_3V(p, ctx->Light.Light[ln].EyePosition);

-               NORMALIZE_3FV(p);

-	       ADD_3V(value, p, eye_z);

-	       NORMALIZE_3FV(value);

-	       value[3] = 1.0;

-            }

-            return;

-         default:

-            _mesa_problem(ctx, "Invalid light state in fetch_state");

-            return;

-         }

-      }

-   case STATE_LIGHTMODEL_AMBIENT:

-      COPY_4V(value, ctx->Light.Model.Ambient);

-      return;

-   case STATE_LIGHTMODEL_SCENECOLOR:

-      if (state[1] == 0) {

-         /* front */

-         GLint i;

-         for (i = 0; i < 3; i++) {

-            value[i] = ctx->Light.Model.Ambient[i]

-               * ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT][i]

-               + ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_EMISSION][i];

-         }

-	 value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3];

-      }

-      else {

-         /* back */

-         GLint i;

-         for (i = 0; i < 3; i++) {

-            value[i] = ctx->Light.Model.Ambient[i]

-               * ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_AMBIENT][i]

-               + ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_EMISSION][i];

-         }

-	 value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3];

-      }

-      return;

-   case STATE_LIGHTPROD:

-      {

-         const GLuint ln = (GLuint) state[1];

-         const GLuint face = (GLuint) state[2];

-         GLint i;

-         ASSERT(face == 0 || face == 1);

-         switch (state[3]) {

-            case STATE_AMBIENT:

-               for (i = 0; i < 3; i++) {

-                  value[i] = ctx->Light.Light[ln].Ambient[i] *

-                     ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT+face][i];

-               }

-               /* [3] = material alpha */

-               value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT+face][3];

-               return;

-            case STATE_DIFFUSE:

-               for (i = 0; i < 3; i++) {

-                  value[i] = ctx->Light.Light[ln].Diffuse[i] *

-                     ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][i];

-               }

-               /* [3] = material alpha */

-               value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3];

-               return;

-            case STATE_SPECULAR:

-               for (i = 0; i < 3; i++) {

-                  value[i] = ctx->Light.Light[ln].Specular[i] *

-                     ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SPECULAR+face][i];

-               }

-               /* [3] = material alpha */

-               value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SPECULAR+face][3];

-               return;

-            default:

-               _mesa_problem(ctx, "Invalid lightprod state in fetch_state");

-               return;

-         }

-      }

-   case STATE_TEXGEN:

-      {

-         /* state[1] is the texture unit */

-         const GLuint unit = (GLuint) state[1];

-         /* state[2] is the texgen attribute */

-         switch (state[2]) {

-         case STATE_TEXGEN_EYE_S:

-            COPY_4V(value, ctx->Texture.Unit[unit].GenS.EyePlane);

-            return;

-         case STATE_TEXGEN_EYE_T:

-            COPY_4V(value, ctx->Texture.Unit[unit].GenT.EyePlane);

-            return;

-         case STATE_TEXGEN_EYE_R:

-            COPY_4V(value, ctx->Texture.Unit[unit].GenR.EyePlane);

-            return;

-         case STATE_TEXGEN_EYE_Q:

-            COPY_4V(value, ctx->Texture.Unit[unit].GenQ.EyePlane);

-            return;

-         case STATE_TEXGEN_OBJECT_S:

-            COPY_4V(value, ctx->Texture.Unit[unit].GenS.ObjectPlane);

-            return;

-         case STATE_TEXGEN_OBJECT_T:

-            COPY_4V(value, ctx->Texture.Unit[unit].GenT.ObjectPlane);

-            return;

-         case STATE_TEXGEN_OBJECT_R:

-            COPY_4V(value, ctx->Texture.Unit[unit].GenR.ObjectPlane);

-            return;

-         case STATE_TEXGEN_OBJECT_Q:

-            COPY_4V(value, ctx->Texture.Unit[unit].GenQ.ObjectPlane);

-            return;

-         default:

-            _mesa_problem(ctx, "Invalid texgen state in fetch_state");

-            return;

-         }

-      }

-   case STATE_TEXENV_COLOR:

-      {

-         /* state[1] is the texture unit */

-         const GLuint unit = (GLuint) state[1];

-         COPY_4V(value, ctx->Texture.Unit[unit].EnvColor);

-      }

-      return;

-   case STATE_FOG_COLOR:

-      COPY_4V(value, ctx->Fog.Color);

-      return;

-   case STATE_FOG_PARAMS:

-      value[0] = ctx->Fog.Density;

-      value[1] = ctx->Fog.Start;

-      value[2] = ctx->Fog.End;

-      value[3] = (ctx->Fog.End == ctx->Fog.Start)

-         ? 1.0f : (GLfloat)(1.0 / (ctx->Fog.End - ctx->Fog.Start));

-      return;

-   case STATE_CLIPPLANE:

-      {

-         const GLuint plane = (GLuint) state[1];

-         COPY_4V(value, ctx->Transform.EyeUserPlane[plane]);

-      }

-      return;

-   case STATE_POINT_SIZE:

-      value[0] = ctx->Point.Size;

-      value[1] = ctx->Point.MinSize;

-      value[2] = ctx->Point.MaxSize;

-      value[3] = ctx->Point.Threshold;

-      return;

-   case STATE_POINT_ATTENUATION:

-      value[0] = ctx->Point.Params[0];

-      value[1] = ctx->Point.Params[1];

-      value[2] = ctx->Point.Params[2];

-      value[3] = 1.0F;

-      return;

-   case STATE_MODELVIEW_MATRIX:

-   case STATE_PROJECTION_MATRIX:

-   case STATE_MVP_MATRIX:

-   case STATE_TEXTURE_MATRIX:

-   case STATE_PROGRAM_MATRIX:

-      {

-         /* state[0] = modelview, projection, texture, etc. */

-         /* state[1] = which texture matrix or program matrix */

-         /* state[2] = first row to fetch */

-         /* state[3] = last row to fetch */

-         /* state[4] = transpose, inverse or invtrans */

-         const GLmatrix *matrix;

-         const gl_state_index mat = state[0];

-         const GLuint index = (GLuint) state[1];

-         const GLuint firstRow = (GLuint) state[2];

-         const GLuint lastRow = (GLuint) state[3];

-         const gl_state_index modifier = state[4];

-         const GLfloat *m;

-         GLuint row, i;

-         ASSERT(firstRow >= 0);

-         ASSERT(firstRow < 4);

-         ASSERT(lastRow >= 0);

-         ASSERT(lastRow < 4);

-         if (mat == STATE_MODELVIEW_MATRIX) {

-            matrix = ctx->ModelviewMatrixStack.Top;

-         }

-         else if (mat == STATE_PROJECTION_MATRIX) {

-            matrix = ctx->ProjectionMatrixStack.Top;

-         }

-         else if (mat == STATE_MVP_MATRIX) {

-            matrix = &ctx->_ModelProjectMatrix;

-         }

-         else if (mat == STATE_TEXTURE_MATRIX) {

-            ASSERT(index < Elements(ctx->TextureMatrixStack));

-            matrix = ctx->TextureMatrixStack[index].Top;

-         }

-         else if (mat == STATE_PROGRAM_MATRIX) {

-            ASSERT(index < Elements(ctx->ProgramMatrixStack));

-            matrix = ctx->ProgramMatrixStack[index].Top;

-         }

-         else {

-            _mesa_problem(ctx, "Bad matrix name in _mesa_fetch_state()");

-            return;

-         }

-         if (modifier == STATE_MATRIX_INVERSE ||

-             modifier == STATE_MATRIX_INVTRANS) {

-            /* Be sure inverse is up to date:

-	     */

-            _math_matrix_alloc_inv( (GLmatrix *) matrix );

-	    _math_matrix_analyse( (GLmatrix*) matrix );

-            m = matrix->inv;

-         }

-         else {

-            m = matrix->m;

-         }

-         if (modifier == STATE_MATRIX_TRANSPOSE ||

-             modifier == STATE_MATRIX_INVTRANS) {

-            for (i = 0, row = firstRow; row <= lastRow; row++) {

-               value[i++] = m[row * 4 + 0];

-               value[i++] = m[row * 4 + 1];

-               value[i++] = m[row * 4 + 2];

-               value[i++] = m[row * 4 + 3];

-            }

-         }

-         else {

-            for (i = 0, row = firstRow; row <= lastRow; row++) {

-               value[i++] = m[row + 0];

-               value[i++] = m[row + 4];

-               value[i++] = m[row + 8];

-               value[i++] = m[row + 12];

-            }

-         }

-      }

-      return;

-   case STATE_DEPTH_RANGE:

-      value[0] = ctx->Viewport.Near;                     /* near       */

-      value[1] = ctx->Viewport.Far;                      /* far        */

-      value[2] = ctx->Viewport.Far - ctx->Viewport.Near; /* far - near */

-      value[3] = 1.0;

-      return;

-   case STATE_FRAGMENT_PROGRAM:

-      {

-         /* state[1] = {STATE_ENV, STATE_LOCAL} */

-         /* state[2] = parameter index          */

-         const int idx = (int) state[2];

-         switch (state[1]) {

-            case STATE_ENV:

-               COPY_4V(value, ctx->FragmentProgram.Parameters[idx]);

-               return;

-            case STATE_LOCAL:

-               COPY_4V(value, ctx->FragmentProgram.Current->Base.LocalParams[idx]);

-               return;

-            default:

-               _mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()");

-               return;

-         }

-      }

-      return;

-

-   case STATE_VERTEX_PROGRAM:

-      {

-         /* state[1] = {STATE_ENV, STATE_LOCAL} */

-         /* state[2] = parameter index          */

-         const int idx = (int) state[2];

-         switch (state[1]) {

-            case STATE_ENV:

-               COPY_4V(value, ctx->VertexProgram.Parameters[idx]);

-               return;

-            case STATE_LOCAL:

-               COPY_4V(value, ctx->VertexProgram.Current->Base.LocalParams[idx]);

-               return;

-            default:

-               _mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()");

-               return;

-         }

-      }

-      return;

-

-   case STATE_NORMAL_SCALE:

-      ASSIGN_4V(value, ctx->_ModelViewInvScale, 0, 0, 1);

-      return;

-

-   case STATE_INTERNAL:

-      switch (state[1]) {

-      case STATE_CURRENT_ATTRIB:

-         {

-            const GLuint idx = (GLuint) state[2];

-            COPY_4V(value, ctx->Current.Attrib[idx]);

-         }

-         return;

-

-      case STATE_NORMAL_SCALE:

-         ASSIGN_4V(value, 

-                   ctx->_ModelViewInvScale, 

-                   ctx->_ModelViewInvScale, 

-                   ctx->_ModelViewInvScale, 

-                   1);

-         return;

-

-      case STATE_TEXRECT_SCALE:

-         /* Value = { 1/texWidth, 1/texHeight, 0, 1 }.

-          * Used to convert unnormalized texcoords to normalized texcoords.

-          */

-         {

-            const int unit = (int) state[2];

-            const struct gl_texture_object *texObj

-               = ctx->Texture.Unit[unit]._Current;

-            if (texObj) {

-               struct gl_texture_image *texImage = texObj->Image[0][0];

-               ASSIGN_4V(value,

-                         (GLfloat) (1.0 / texImage->Width),

-                         (GLfloat) (1.0 / texImage->Height),

-                         0.0f, 1.0f);

-            }

-         }

-         return;

-

-      case STATE_FOG_PARAMS_OPTIMIZED:

-         /* for simpler per-vertex/pixel fog calcs. POW (for EXP/EXP2 fog)

-          * might be more expensive than EX2 on some hw, plus it needs

-          * another constant (e) anyway. Linear fog can now be done with a

-          * single MAD.

-          * linear: fogcoord * -1/(end-start) + end/(end-start)

-          * exp: 2^-(density/ln(2) * fogcoord)

-          * exp2: 2^-((density/(ln(2)^2) * fogcoord)^2)

-          */

-         value[0] = (ctx->Fog.End == ctx->Fog.Start)

-            ? 1.0f : (GLfloat)(-1.0F / (ctx->Fog.End - ctx->Fog.Start));

-         value[1] = ctx->Fog.End * -value[0];

-         value[2] = (GLfloat)(ctx->Fog.Density * ONE_DIV_LN2);

-         value[3] = (GLfloat)(ctx->Fog.Density * ONE_DIV_SQRT_LN2);

-         return;

-

-      case STATE_POINT_SIZE_CLAMPED:

-         {

-           /* this includes implementation dependent limits, to avoid

-            * another potentially necessary clamp.

-            * Note: for sprites, point smooth (point AA) is ignored

-            * and we'll clamp to MinPointSizeAA and MaxPointSize, because we

-            * expect drivers will want to say their minimum for AA size is 0.0

-            * but for non-AA it's 1.0 (because normal points with size below 1.0

-            * need to get rounded up to 1.0, hence never disappear). GL does

-            * not specify max clamp size for sprites, other than it needs to be

-            * at least as large as max AA size, hence use non-AA size there.

-            */

-            GLfloat minImplSize;

-            GLfloat maxImplSize;

-            if (ctx->Point.PointSprite) {

-               minImplSize = ctx->Const.MinPointSizeAA;

-               maxImplSize = ctx->Const.MaxPointSize;

-            }

-            else if (ctx->Point.SmoothFlag || ctx->Multisample._Enabled) {

-               minImplSize = ctx->Const.MinPointSizeAA;

-               maxImplSize = ctx->Const.MaxPointSizeAA;

-            }

-            else {

-               minImplSize = ctx->Const.MinPointSize;

-               maxImplSize = ctx->Const.MaxPointSize;

-            }

-            value[0] = ctx->Point.Size;

-            value[1] = ctx->Point.MinSize >= minImplSize ? ctx->Point.MinSize : minImplSize;

-            value[2] = ctx->Point.MaxSize <= maxImplSize ? ctx->Point.MaxSize : maxImplSize;

-            value[3] = ctx->Point.Threshold;

-         }

-         return;

-      case STATE_POINT_SIZE_IMPL_CLAMP:

-         {

-           /* for implementation clamp only in vs */

-            GLfloat minImplSize;

-            GLfloat maxImplSize;

-            if (ctx->Point.PointSprite) {

-               minImplSize = ctx->Const.MinPointSizeAA;

-               maxImplSize = ctx->Const.MaxPointSize;

-            }

-            else if (ctx->Point.SmoothFlag || ctx->Multisample._Enabled) {

-               minImplSize = ctx->Const.MinPointSizeAA;

-               maxImplSize = ctx->Const.MaxPointSizeAA;

-            }

-            else {

-               minImplSize = ctx->Const.MinPointSize;

-               maxImplSize = ctx->Const.MaxPointSize;

-            }

-            value[0] = ctx->Point.Size;

-            value[1] = minImplSize;

-            value[2] = maxImplSize;

-            value[3] = ctx->Point.Threshold;

-         }

-         return;

-      case STATE_LIGHT_SPOT_DIR_NORMALIZED:

-         {

-            /* here, state[2] is the light number */

-            /* pre-normalize spot dir */

-            const GLuint ln = (GLuint) state[2];

-            COPY_3V(value, ctx->Light.Light[ln]._NormSpotDirection);

-            value[3] = ctx->Light.Light[ln]._CosCutoff;

-         }

-         return;

-

-      case STATE_LIGHT_POSITION:

-         {

-            const GLuint ln = (GLuint) state[2];

-            COPY_4V(value, ctx->Light.Light[ln]._Position);

-         }

-         return;

-

-      case STATE_LIGHT_POSITION_NORMALIZED:

-         {

-            const GLuint ln = (GLuint) state[2];

-            COPY_4V(value, ctx->Light.Light[ln]._Position);

-            NORMALIZE_3FV( value );

-         }

-         return;

-

-      case STATE_LIGHT_HALF_VECTOR:

-         {

-            const GLuint ln = (GLuint) state[2];

-            GLfloat p[3];

-            /* Compute infinite half angle vector:

-             *   halfVector = normalize(normalize(lightPos) + (0, 0, 1))

-             * light.EyePosition.w should be 0 for infinite lights.

-             */

-            COPY_3V(p, ctx->Light.Light[ln]._Position);

-            NORMALIZE_3FV(p);

-            ADD_3V(value, p, ctx->_EyeZDir);

-            NORMALIZE_3FV(value);

-            value[3] = 1.0;

-         }

-         return;

-

-      case STATE_PT_SCALE:

-         value[0] = ctx->Pixel.RedScale;

-         value[1] = ctx->Pixel.GreenScale;

-         value[2] = ctx->Pixel.BlueScale;

-         value[3] = ctx->Pixel.AlphaScale;

-         return;

-

-      case STATE_PT_BIAS:

-         value[0] = ctx->Pixel.RedBias;

-         value[1] = ctx->Pixel.GreenBias;

-         value[2] = ctx->Pixel.BlueBias;

-         value[3] = ctx->Pixel.AlphaBias;

-         return;

-

-      case STATE_SHADOW_AMBIENT:

-         {

-            const int unit = (int) state[2];

-            const struct gl_texture_object *texObj

-               = ctx->Texture.Unit[unit]._Current;

-            if (texObj) {

-               value[0] =

-               value[1] =

-               value[2] =

-               value[3] = texObj->CompareFailValue;

-            }

-         }

-         return;

-

-      case STATE_FB_SIZE:

-         value[0] = (GLfloat) (ctx->DrawBuffer->Width - 1);

-         value[1] = (GLfloat) (ctx->DrawBuffer->Height - 1);

-         value[2] = 0.0F;

-         value[3] = 0.0F;

-         return;

-

-      case STATE_FB_WPOS_Y_TRANSFORM:

-         /* A driver may negate this conditional by using ZW swizzle

-          * instead of XY (based on e.g. some other state). */

-         if (ctx->DrawBuffer->Name != 0) {

-            /* Identity (XY) followed by flipping Y upside down (ZW). */

-            value[0] = 1.0F;

-            value[1] = 0.0F;

-            value[2] = -1.0F;

-            value[3] = (GLfloat) (ctx->DrawBuffer->Height - 1);

-         } else {

-            /* Flipping Y upside down (XY) followed by identity (ZW). */

-            value[0] = -1.0F;

-            value[1] = (GLfloat) (ctx->DrawBuffer->Height - 1);

-            value[2] = 1.0F;

-            value[3] = 0.0F;

-         }

-         return;

-

-      case STATE_ROT_MATRIX_0:

-         {

-            const int unit = (int) state[2];

-            GLfloat *rotMat22 = ctx->Texture.Unit[unit].RotMatrix;

-            value[0] = rotMat22[0]; 

-            value[1] = rotMat22[2];

-            value[2] = 0.0;

-            value[3] = 0.0;

-         }

-         return;

-

-      case STATE_ROT_MATRIX_1:

-         {

-            const int unit = (int) state[2];

-            GLfloat *rotMat22 = ctx->Texture.Unit[unit].RotMatrix;

-            value[0] = rotMat22[1];

-            value[1] = rotMat22[3];

-            value[2] = 0.0;

-            value[3] = 0.0;

-         }

-         return;

-

-      /* XXX: make sure new tokens added here are also handled in the 

-       * _mesa_program_state_flags() switch, below.

-       */

-      default:

-         /* Unknown state indexes are silently ignored here.

-          * Drivers may do something special.

-          */

-         return;

-      }

-      return;

-

-   default:

-      _mesa_problem(ctx, "Invalid state in _mesa_fetch_state");

-      return;

-   }

-}

-

-

-/**

- * Return a bitmask of the Mesa state flags (_NEW_* values) which would

- * indicate that the given context state may have changed.

- * The bitmask is used during validation to determine if we need to update

- * vertex/fragment program parameters (like "state.material.color") when

- * some GL state has changed.

- */

-GLbitfield

-_mesa_program_state_flags(const gl_state_index state[STATE_LENGTH])

-{

-   switch (state[0]) {

-   case STATE_MATERIAL:

-   case STATE_LIGHT:

-   case STATE_LIGHTMODEL_AMBIENT:

-   case STATE_LIGHTMODEL_SCENECOLOR:

-   case STATE_LIGHTPROD:

-      return _NEW_LIGHT;

-

-   case STATE_TEXGEN:

-   case STATE_TEXENV_COLOR:

-      return _NEW_TEXTURE;

-

-   case STATE_FOG_COLOR:

-   case STATE_FOG_PARAMS:

-      return _NEW_FOG;

-

-   case STATE_CLIPPLANE:

-      return _NEW_TRANSFORM;

-

-   case STATE_POINT_SIZE:

-   case STATE_POINT_ATTENUATION:

-      return _NEW_POINT;

-

-   case STATE_MODELVIEW_MATRIX:

-      return _NEW_MODELVIEW;

-   case STATE_PROJECTION_MATRIX:

-      return _NEW_PROJECTION;

-   case STATE_MVP_MATRIX:

-      return _NEW_MODELVIEW | _NEW_PROJECTION;

-   case STATE_TEXTURE_MATRIX:

-      return _NEW_TEXTURE_MATRIX;

-   case STATE_PROGRAM_MATRIX:

-      return _NEW_TRACK_MATRIX;

-

-   case STATE_DEPTH_RANGE:

-      return _NEW_VIEWPORT;

-

-   case STATE_FRAGMENT_PROGRAM:

-   case STATE_VERTEX_PROGRAM:

-      return _NEW_PROGRAM;

-

-   case STATE_NORMAL_SCALE:

-      return _NEW_MODELVIEW;

-

-   case STATE_INTERNAL:

-      switch (state[1]) {

-      case STATE_CURRENT_ATTRIB:

-         return _NEW_CURRENT_ATTRIB;

-

-      case STATE_NORMAL_SCALE:

-         return _NEW_MODELVIEW;

-

-      case STATE_TEXRECT_SCALE:

-      case STATE_SHADOW_AMBIENT:

-      case STATE_ROT_MATRIX_0:

-      case STATE_ROT_MATRIX_1:

-	 return _NEW_TEXTURE;

-      case STATE_FOG_PARAMS_OPTIMIZED:

-	 return _NEW_FOG;

-      case STATE_POINT_SIZE_CLAMPED:

-      case STATE_POINT_SIZE_IMPL_CLAMP:

-         return _NEW_POINT | _NEW_MULTISAMPLE;

-      case STATE_LIGHT_SPOT_DIR_NORMALIZED:

-      case STATE_LIGHT_POSITION:

-      case STATE_LIGHT_POSITION_NORMALIZED:

-      case STATE_LIGHT_HALF_VECTOR:

-         return _NEW_LIGHT;

-

-      case STATE_PT_SCALE:

-      case STATE_PT_BIAS:

-         return _NEW_PIXEL;

-

-      case STATE_FB_SIZE:

-      case STATE_FB_WPOS_Y_TRANSFORM:

-         return _NEW_BUFFERS;

-

-      default:

-         /* unknown state indexes are silently ignored and

-         *  no flag set, since it is handled by the driver.

-         */

-	 return 0;

-      }

-

-   default:

-      _mesa_problem(NULL, "unexpected state[0] in make_state_flags()");

-      return 0;

-   }

-}

-

-

-static void

-append(char *dst, const char *src)

-{

-   while (*dst)

-      dst++;

-   while (*src)

-     *dst++ = *src++;

-   *dst = 0;

-}

-

-

-/**

- * Convert token 'k' to a string, append it onto 'dst' string.

- */

-static void

-append_token(char *dst, gl_state_index k)

-{

-   switch (k) {

-   case STATE_MATERIAL:

-      append(dst, "material");

-      break;

-   case STATE_LIGHT:

-      append(dst, "light");

-      break;

-   case STATE_LIGHTMODEL_AMBIENT:

-      append(dst, "lightmodel.ambient");

-      break;

-   case STATE_LIGHTMODEL_SCENECOLOR:

-      break;

-   case STATE_LIGHTPROD:

-      append(dst, "lightprod");

-      break;

-   case STATE_TEXGEN:

-      append(dst, "texgen");

-      break;

-   case STATE_FOG_COLOR:

-      append(dst, "fog.color");

-      break;

-   case STATE_FOG_PARAMS:

-      append(dst, "fog.params");

-      break;

-   case STATE_CLIPPLANE:

-      append(dst, "clip");

-      break;

-   case STATE_POINT_SIZE:

-      append(dst, "point.size");

-      break;

-   case STATE_POINT_ATTENUATION:

-      append(dst, "point.attenuation");

-      break;

-   case STATE_MODELVIEW_MATRIX:

-      append(dst, "matrix.modelview");

-      break;

-   case STATE_PROJECTION_MATRIX:

-      append(dst, "matrix.projection");

-      break;

-   case STATE_MVP_MATRIX:

-      append(dst, "matrix.mvp");

-      break;

-   case STATE_TEXTURE_MATRIX:

-      append(dst, "matrix.texture");

-      break;

-   case STATE_PROGRAM_MATRIX:

-      append(dst, "matrix.program");

-      break;

-   case STATE_MATRIX_INVERSE:

-      append(dst, ".inverse");

-      break;

-   case STATE_MATRIX_TRANSPOSE:

-      append(dst, ".transpose");

-      break;

-   case STATE_MATRIX_INVTRANS:

-      append(dst, ".invtrans");

-      break;

-   case STATE_AMBIENT:

-      append(dst, ".ambient");

-      break;

-   case STATE_DIFFUSE:

-      append(dst, ".diffuse");

-      break;

-   case STATE_SPECULAR:

-      append(dst, ".specular");

-      break;

-   case STATE_EMISSION:

-      append(dst, ".emission");

-      break;

-   case STATE_SHININESS:

-      append(dst, "lshininess");

-      break;

-   case STATE_HALF_VECTOR:

-      append(dst, ".half");

-      break;

-   case STATE_POSITION:

-      append(dst, ".position");

-      break;

-   case STATE_ATTENUATION:

-      append(dst, ".attenuation");

-      break;

-   case STATE_SPOT_DIRECTION:

-      append(dst, ".spot.direction");

-      break;

-   case STATE_SPOT_CUTOFF:

-      append(dst, ".spot.cutoff");

-      break;

-   case STATE_TEXGEN_EYE_S:

-      append(dst, ".eye.s");

-      break;

-   case STATE_TEXGEN_EYE_T:

-      append(dst, ".eye.t");

-      break;

-   case STATE_TEXGEN_EYE_R:

-      append(dst, ".eye.r");

-      break;

-   case STATE_TEXGEN_EYE_Q:

-      append(dst, ".eye.q");

-      break;

-   case STATE_TEXGEN_OBJECT_S:

-      append(dst, ".object.s");

-      break;

-   case STATE_TEXGEN_OBJECT_T:

-      append(dst, ".object.t");

-      break;

-   case STATE_TEXGEN_OBJECT_R:

-      append(dst, ".object.r");

-      break;

-   case STATE_TEXGEN_OBJECT_Q:

-      append(dst, ".object.q");

-      break;

-   case STATE_TEXENV_COLOR:

-      append(dst, "texenv");

-      break;

-   case STATE_DEPTH_RANGE:

-      append(dst, "depth.range");

-      break;

-   case STATE_VERTEX_PROGRAM:

-   case STATE_FRAGMENT_PROGRAM:

-      break;

-   case STATE_ENV:

-      append(dst, "env");

-      break;

-   case STATE_LOCAL:

-      append(dst, "local");

-      break;

-   /* BEGIN internal state vars */

-   case STATE_INTERNAL:

-      append(dst, ".internal.");

-      break;

-   case STATE_CURRENT_ATTRIB:

-      append(dst, "current");

-      break;

-   case STATE_NORMAL_SCALE:

-      append(dst, "normalScale");

-      break;

-   case STATE_TEXRECT_SCALE:

-      append(dst, "texrectScale");

-      break;

-   case STATE_FOG_PARAMS_OPTIMIZED:

-      append(dst, "fogParamsOptimized");

-      break;

-   case STATE_POINT_SIZE_CLAMPED:

-      append(dst, "pointSizeClamped");

-      break;

-   case STATE_POINT_SIZE_IMPL_CLAMP:

-      append(dst, "pointSizeImplClamp");

-      break;

-   case STATE_LIGHT_SPOT_DIR_NORMALIZED:

-      append(dst, "lightSpotDirNormalized");

-      break;

-   case STATE_LIGHT_POSITION:

-      append(dst, "lightPosition");

-      break;

-   case STATE_LIGHT_POSITION_NORMALIZED:

-      append(dst, "light.position.normalized");

-      break;

-   case STATE_LIGHT_HALF_VECTOR:

-      append(dst, "lightHalfVector");

-      break;

-   case STATE_PT_SCALE:

-      append(dst, "PTscale");

-      break;

-   case STATE_PT_BIAS:

-      append(dst, "PTbias");

-      break;

-   case STATE_SHADOW_AMBIENT:

-      append(dst, "CompareFailValue");

-      break;

-   case STATE_FB_SIZE:

-      append(dst, "FbSize");

-      break;

-   case STATE_FB_WPOS_Y_TRANSFORM:

-      append(dst, "FbWposYTransform");

-      break;

-   case STATE_ROT_MATRIX_0:

-      append(dst, "rotMatrixRow0");

-      break;

-   case STATE_ROT_MATRIX_1:

-      append(dst, "rotMatrixRow1");

-      break;

-   default:

-      /* probably STATE_INTERNAL_DRIVER+i (driver private state) */

-      append(dst, "driverState");

-   }

-}

-

-static void

-append_face(char *dst, GLint face)

-{

-   if (face == 0)

-      append(dst, "front.");

-   else

-      append(dst, "back.");

-}

-

-static void

-append_index(char *dst, GLint index)

-{

-   char s[20];

-   sprintf(s, "[%d]", index);

-   append(dst, s);

-}

-

-/**

- * Make a string from the given state vector.

- * For example, return "state.matrix.texture[2].inverse".

- * Use free() to deallocate the string.

- */

-char *

-_mesa_program_state_string(const gl_state_index state[STATE_LENGTH])

-{

-   char str[1000] = "";

-   char tmp[30];

-

-   append(str, "state.");

-   append_token(str, state[0]);

-

-   switch (state[0]) {

-   case STATE_MATERIAL:

-      append_face(str, state[1]);

-      append_token(str, state[2]);

-      break;

-   case STATE_LIGHT:

-      append_index(str, state[1]); /* light number [i]. */

-      append_token(str, state[2]); /* coefficients */

-      break;

-   case STATE_LIGHTMODEL_AMBIENT:

-      append(str, "lightmodel.ambient");

-      break;

-   case STATE_LIGHTMODEL_SCENECOLOR:

-      if (state[1] == 0) {

-         append(str, "lightmodel.front.scenecolor");

-      }

-      else {

-         append(str, "lightmodel.back.scenecolor");

-      }

-      break;

-   case STATE_LIGHTPROD:

-      append_index(str, state[1]); /* light number [i]. */

-      append_face(str, state[2]);

-      append_token(str, state[3]);

-      break;

-   case STATE_TEXGEN:

-      append_index(str, state[1]); /* tex unit [i] */

-      append_token(str, state[2]); /* plane coef */

-      break;

-   case STATE_TEXENV_COLOR:

-      append_index(str, state[1]); /* tex unit [i] */

-      append(str, "color");

-      break;

-   case STATE_CLIPPLANE:

-      append_index(str, state[1]); /* plane [i] */

-      append(str, ".plane");

-      break;

-   case STATE_MODELVIEW_MATRIX:

-   case STATE_PROJECTION_MATRIX:

-   case STATE_MVP_MATRIX:

-   case STATE_TEXTURE_MATRIX:

-   case STATE_PROGRAM_MATRIX:

-      {

-         /* state[0] = modelview, projection, texture, etc. */

-         /* state[1] = which texture matrix or program matrix */

-         /* state[2] = first row to fetch */

-         /* state[3] = last row to fetch */

-         /* state[4] = transpose, inverse or invtrans */

-         const gl_state_index mat = state[0];

-         const GLuint index = (GLuint) state[1];

-         const GLuint firstRow = (GLuint) state[2];

-         const GLuint lastRow = (GLuint) state[3];

-         const gl_state_index modifier = state[4];

-         if (index ||

-             mat == STATE_TEXTURE_MATRIX ||

-             mat == STATE_PROGRAM_MATRIX)

-            append_index(str, index);

-         if (modifier)

-            append_token(str, modifier);

-         if (firstRow == lastRow)

-            sprintf(tmp, ".row[%d]", firstRow);

-         else

-            sprintf(tmp, ".row[%d..%d]", firstRow, lastRow);

-         append(str, tmp);

-      }

-      break;

-   case STATE_POINT_SIZE:

-      break;

-   case STATE_POINT_ATTENUATION:

-      break;

-   case STATE_FOG_PARAMS:

-      break;

-   case STATE_FOG_COLOR:

-      break;

-   case STATE_DEPTH_RANGE:

-      break;

-   case STATE_FRAGMENT_PROGRAM:

-   case STATE_VERTEX_PROGRAM:

-      /* state[1] = {STATE_ENV, STATE_LOCAL} */

-      /* state[2] = parameter index          */

-      append_token(str, state[1]);

-      append_index(str, state[2]);

-      break;

-   case STATE_NORMAL_SCALE:

-      break;

-   case STATE_INTERNAL:

-      append_token(str, state[1]);

-      if (state[1] == STATE_CURRENT_ATTRIB)

-         append_index(str, state[2]);

-       break;

-   default:

-      _mesa_problem(NULL, "Invalid state in _mesa_program_state_string");

-      break;

-   }

-

-   return _mesa_strdup(str);

-}

-

-

-/**

- * Loop over all the parameters in a parameter list.  If the parameter

- * is a GL state reference, look up the current value of that state

- * variable and put it into the parameter's Value[4] array.

- * Other parameter types never change or are explicitly set by the user

- * with glUniform() or glProgramParameter(), etc.

- * This would be called at glBegin time.

- */

-void

-_mesa_load_state_parameters(struct gl_context *ctx,

-                            struct gl_program_parameter_list *paramList)

-{

-   GLuint i;

-

-   if (!paramList)

-      return;

-

-   for (i = 0; i < paramList->NumParameters; i++) {

-      if (paramList->Parameters[i].Type == PROGRAM_STATE_VAR) {

-         _mesa_fetch_state(ctx,

-			   paramList->Parameters[i].StateIndexes,

-                           paramList->ParameterValues[i]);

-      }

-   }

-}

-

-

-/**

- * Copy the 16 elements of a matrix into four consecutive program

- * registers starting at 'pos'.

- */

-static void

-load_matrix(GLfloat registers[][4], GLuint pos, const GLfloat mat[16])

-{

-   GLuint i;

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

-      registers[pos + i][0] = mat[0 + i];

-      registers[pos + i][1] = mat[4 + i];

-      registers[pos + i][2] = mat[8 + i];

-      registers[pos + i][3] = mat[12 + i];

-   }

-}

-

-

-/**

- * As above, but transpose the matrix.

- */

-static void

-load_transpose_matrix(GLfloat registers[][4], GLuint pos,

-                      const GLfloat mat[16])

-{

-   memcpy(registers[pos], mat, 16 * sizeof(GLfloat));

-}

-

-

-/**

- * Load current vertex program's parameter registers with tracked

- * matrices (if NV program).  This only needs to be done per

- * glBegin/glEnd, not per-vertex.

- */

-void

-_mesa_load_tracked_matrices(struct gl_context *ctx)

-{

-   GLuint i;

-

-   for (i = 0; i < MAX_NV_VERTEX_PROGRAM_PARAMS / 4; i++) {

-      /* point 'mat' at source matrix */

-      GLmatrix *mat;

-      if (ctx->VertexProgram.TrackMatrix[i] == GL_MODELVIEW) {

-         mat = ctx->ModelviewMatrixStack.Top;

-      }

-      else if (ctx->VertexProgram.TrackMatrix[i] == GL_PROJECTION) {

-         mat = ctx->ProjectionMatrixStack.Top;

-      }

-      else if (ctx->VertexProgram.TrackMatrix[i] == GL_TEXTURE) {

-         GLuint unit = MIN2(ctx->Texture.CurrentUnit,

-                            Elements(ctx->TextureMatrixStack) - 1);

-         mat = ctx->TextureMatrixStack[unit].Top;

-      }

-      else if (ctx->VertexProgram.TrackMatrix[i]==GL_MODELVIEW_PROJECTION_NV) {

-         /* XXX verify the combined matrix is up to date */

-         mat = &ctx->_ModelProjectMatrix;

-      }

-      else if (ctx->VertexProgram.TrackMatrix[i] >= GL_MATRIX0_NV &&

-               ctx->VertexProgram.TrackMatrix[i] <= GL_MATRIX7_NV) {

-         GLuint n = ctx->VertexProgram.TrackMatrix[i] - GL_MATRIX0_NV;

-         ASSERT(n < Elements(ctx->ProgramMatrixStack));

-         mat = ctx->ProgramMatrixStack[n].Top;

-      }

-      else {

-         /* no matrix is tracked, but we leave the register values as-is */

-         assert(ctx->VertexProgram.TrackMatrix[i] == GL_NONE);

-         continue;

-      }

-

-      /* load the matrix values into sequential registers */

-      if (ctx->VertexProgram.TrackMatrixTransform[i] == GL_IDENTITY_NV) {

-         load_matrix(ctx->VertexProgram.Parameters, i*4, mat->m);

-      }

-      else if (ctx->VertexProgram.TrackMatrixTransform[i] == GL_INVERSE_NV) {

-         _math_matrix_analyse(mat); /* update the inverse */

-         ASSERT(!_math_matrix_is_dirty(mat));

-         load_matrix(ctx->VertexProgram.Parameters, i*4, mat->inv);

-      }

-      else if (ctx->VertexProgram.TrackMatrixTransform[i] == GL_TRANSPOSE_NV) {

-         load_transpose_matrix(ctx->VertexProgram.Parameters, i*4, mat->m);

-      }

-      else {

-         assert(ctx->VertexProgram.TrackMatrixTransform[i]

-                == GL_INVERSE_TRANSPOSE_NV);

-         _math_matrix_analyse(mat); /* update the inverse */

-         ASSERT(!_math_matrix_is_dirty(mat));

-         load_transpose_matrix(ctx->VertexProgram.Parameters, i*4, mat->inv);

-      }

-   }

-}

+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
+ *
+ * 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 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
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file prog_statevars.c
+ * Program state variable management.
+ * \author Brian Paul
+ */
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/imports.h"
+#include "main/macros.h"
+#include "main/mtypes.h"
+#include "prog_statevars.h"
+#include "prog_parameter.h"
+
+
+/**
+ * Use the list of tokens in the state[] array to find global GL state
+ * and return it in <value>.  Usually, four values are returned in <value>
+ * but matrix queries may return as many as 16 values.
+ * This function is used for ARB vertex/fragment programs.
+ * The program parser will produce the state[] values.
+ */
+static void
+_mesa_fetch_state(struct gl_context *ctx, const gl_state_index state[],
+                  GLfloat *value)
+{
+   switch (state[0]) {
+   case STATE_MATERIAL:
+      {
+         /* state[1] is either 0=front or 1=back side */
+         const GLuint face = (GLuint) state[1];
+         const struct gl_material *mat = &ctx->Light.Material;
+         ASSERT(face == 0 || face == 1);
+         /* we rely on tokens numbered so that _BACK_ == _FRONT_+ 1 */
+         ASSERT(MAT_ATTRIB_FRONT_AMBIENT + 1 == MAT_ATTRIB_BACK_AMBIENT);
+         /* XXX we could get rid of this switch entirely with a little
+          * work in arbprogparse.c's parse_state_single_item().
+          */
+         /* state[2] is the material attribute */
+         switch (state[2]) {
+         case STATE_AMBIENT:
+            COPY_4V(value, mat->Attrib[MAT_ATTRIB_FRONT_AMBIENT + face]);
+            return;
+         case STATE_DIFFUSE:
+            COPY_4V(value, mat->Attrib[MAT_ATTRIB_FRONT_DIFFUSE + face]);
+            return;
+         case STATE_SPECULAR:
+            COPY_4V(value, mat->Attrib[MAT_ATTRIB_FRONT_SPECULAR + face]);
+            return;
+         case STATE_EMISSION:
+            COPY_4V(value, mat->Attrib[MAT_ATTRIB_FRONT_EMISSION + face]);
+            return;
+         case STATE_SHININESS:
+            value[0] = mat->Attrib[MAT_ATTRIB_FRONT_SHININESS + face][0];
+            value[1] = 0.0F;
+            value[2] = 0.0F;
+            value[3] = 1.0F;
+            return;
+         default:
+            _mesa_problem(ctx, "Invalid material state in fetch_state");
+            return;
+         }
+      }
+   case STATE_LIGHT:
+      {
+         /* state[1] is the light number */
+         const GLuint ln = (GLuint) state[1];
+         /* state[2] is the light attribute */
+         switch (state[2]) {
+         case STATE_AMBIENT:
+            COPY_4V(value, ctx->Light.Light[ln].Ambient);
+            return;
+         case STATE_DIFFUSE:
+            COPY_4V(value, ctx->Light.Light[ln].Diffuse);
+            return;
+         case STATE_SPECULAR:
+            COPY_4V(value, ctx->Light.Light[ln].Specular);
+            return;
+         case STATE_POSITION:
+            COPY_4V(value, ctx->Light.Light[ln].EyePosition);
+            return;
+         case STATE_ATTENUATION:
+            value[0] = ctx->Light.Light[ln].ConstantAttenuation;
+            value[1] = ctx->Light.Light[ln].LinearAttenuation;
+            value[2] = ctx->Light.Light[ln].QuadraticAttenuation;
+            value[3] = ctx->Light.Light[ln].SpotExponent;
+            return;
+         case STATE_SPOT_DIRECTION:
+            COPY_3V(value, ctx->Light.Light[ln].SpotDirection);
+            value[3] = ctx->Light.Light[ln]._CosCutoff;
+            return;
+         case STATE_SPOT_CUTOFF:
+            value[0] = ctx->Light.Light[ln].SpotCutoff;
+            return;
+         case STATE_HALF_VECTOR:
+            {
+               static const GLfloat eye_z[] = {0, 0, 1};
+               GLfloat p[3];
+               /* Compute infinite half angle vector:
+                *   halfVector = normalize(normalize(lightPos) + (0, 0, 1))
+		* light.EyePosition.w should be 0 for infinite lights.
+                */
+               COPY_3V(p, ctx->Light.Light[ln].EyePosition);
+               NORMALIZE_3FV(p);
+	       ADD_3V(value, p, eye_z);
+	       NORMALIZE_3FV(value);
+	       value[3] = 1.0;
+            }
+            return;
+         default:
+            _mesa_problem(ctx, "Invalid light state in fetch_state");
+            return;
+         }
+      }
+   case STATE_LIGHTMODEL_AMBIENT:
+      COPY_4V(value, ctx->Light.Model.Ambient);
+      return;
+   case STATE_LIGHTMODEL_SCENECOLOR:
+      if (state[1] == 0) {
+         /* front */
+         GLint i;
+         for (i = 0; i < 3; i++) {
+            value[i] = ctx->Light.Model.Ambient[i]
+               * ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT][i]
+               + ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_EMISSION][i];
+         }
+	 value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3];
+      }
+      else {
+         /* back */
+         GLint i;
+         for (i = 0; i < 3; i++) {
+            value[i] = ctx->Light.Model.Ambient[i]
+               * ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_AMBIENT][i]
+               + ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_EMISSION][i];
+         }
+	 value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3];
+      }
+      return;
+   case STATE_LIGHTPROD:
+      {
+         const GLuint ln = (GLuint) state[1];
+         const GLuint face = (GLuint) state[2];
+         GLint i;
+         ASSERT(face == 0 || face == 1);
+         switch (state[3]) {
+            case STATE_AMBIENT:
+               for (i = 0; i < 3; i++) {
+                  value[i] = ctx->Light.Light[ln].Ambient[i] *
+                     ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT+face][i];
+               }
+               /* [3] = material alpha */
+               value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_AMBIENT+face][3];
+               return;
+            case STATE_DIFFUSE:
+               for (i = 0; i < 3; i++) {
+                  value[i] = ctx->Light.Light[ln].Diffuse[i] *
+                     ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][i];
+               }
+               /* [3] = material alpha */
+               value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE+face][3];
+               return;
+            case STATE_SPECULAR:
+               for (i = 0; i < 3; i++) {
+                  value[i] = ctx->Light.Light[ln].Specular[i] *
+                     ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SPECULAR+face][i];
+               }
+               /* [3] = material alpha */
+               value[3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_SPECULAR+face][3];
+               return;
+            default:
+               _mesa_problem(ctx, "Invalid lightprod state in fetch_state");
+               return;
+         }
+      }
+   case STATE_TEXGEN:
+      {
+         /* state[1] is the texture unit */
+         const GLuint unit = (GLuint) state[1];
+         /* state[2] is the texgen attribute */
+         switch (state[2]) {
+         case STATE_TEXGEN_EYE_S:
+            COPY_4V(value, ctx->Texture.Unit[unit].GenS.EyePlane);
+            return;
+         case STATE_TEXGEN_EYE_T:
+            COPY_4V(value, ctx->Texture.Unit[unit].GenT.EyePlane);
+            return;
+         case STATE_TEXGEN_EYE_R:
+            COPY_4V(value, ctx->Texture.Unit[unit].GenR.EyePlane);
+            return;
+         case STATE_TEXGEN_EYE_Q:
+            COPY_4V(value, ctx->Texture.Unit[unit].GenQ.EyePlane);
+            return;
+         case STATE_TEXGEN_OBJECT_S:
+            COPY_4V(value, ctx->Texture.Unit[unit].GenS.ObjectPlane);
+            return;
+         case STATE_TEXGEN_OBJECT_T:
+            COPY_4V(value, ctx->Texture.Unit[unit].GenT.ObjectPlane);
+            return;
+         case STATE_TEXGEN_OBJECT_R:
+            COPY_4V(value, ctx->Texture.Unit[unit].GenR.ObjectPlane);
+            return;
+         case STATE_TEXGEN_OBJECT_Q:
+            COPY_4V(value, ctx->Texture.Unit[unit].GenQ.ObjectPlane);
+            return;
+         default:
+            _mesa_problem(ctx, "Invalid texgen state in fetch_state");
+            return;
+         }
+      }
+   case STATE_TEXENV_COLOR:
+      {
+         /* state[1] is the texture unit */
+         const GLuint unit = (GLuint) state[1];
+         if(ctx->Color._ClampFragmentColor)
+            COPY_4V(value, ctx->Texture.Unit[unit].EnvColor);
+         else
+            COPY_4V(value, ctx->Texture.Unit[unit].EnvColorUnclamped);
+      }
+      return;
+   case STATE_FOG_COLOR:
+      if(ctx->Color._ClampFragmentColor)
+         COPY_4V(value, ctx->Fog.Color);
+      else
+         COPY_4V(value, ctx->Fog.ColorUnclamped);
+      return;
+   case STATE_FOG_PARAMS:
+      value[0] = ctx->Fog.Density;
+      value[1] = ctx->Fog.Start;
+      value[2] = ctx->Fog.End;
+      value[3] = (ctx->Fog.End == ctx->Fog.Start)
+         ? 1.0f : (GLfloat)(1.0 / (ctx->Fog.End - ctx->Fog.Start));
+      return;
+   case STATE_CLIPPLANE:
+      {
+         const GLuint plane = (GLuint) state[1];
+         COPY_4V(value, ctx->Transform.EyeUserPlane[plane]);
+      }
+      return;
+   case STATE_POINT_SIZE:
+      value[0] = ctx->Point.Size;
+      value[1] = ctx->Point.MinSize;
+      value[2] = ctx->Point.MaxSize;
+      value[3] = ctx->Point.Threshold;
+      return;
+   case STATE_POINT_ATTENUATION:
+      value[0] = ctx->Point.Params[0];
+      value[1] = ctx->Point.Params[1];
+      value[2] = ctx->Point.Params[2];
+      value[3] = 1.0F;
+      return;
+   case STATE_MODELVIEW_MATRIX:
+   case STATE_PROJECTION_MATRIX:
+   case STATE_MVP_MATRIX:
+   case STATE_TEXTURE_MATRIX:
+   case STATE_PROGRAM_MATRIX:
+      {
+         /* state[0] = modelview, projection, texture, etc. */
+         /* state[1] = which texture matrix or program matrix */
+         /* state[2] = first row to fetch */
+         /* state[3] = last row to fetch */
+         /* state[4] = transpose, inverse or invtrans */
+         const GLmatrix *matrix;
+         const gl_state_index mat = state[0];
+         const GLuint index = (GLuint) state[1];
+         const GLuint firstRow = (GLuint) state[2];
+         const GLuint lastRow = (GLuint) state[3];
+         const gl_state_index modifier = state[4];
+         const GLfloat *m;
+         GLuint row, i;
+         ASSERT(firstRow >= 0);
+         ASSERT(firstRow < 4);
+         ASSERT(lastRow >= 0);
+         ASSERT(lastRow < 4);
+         if (mat == STATE_MODELVIEW_MATRIX) {
+            matrix = ctx->ModelviewMatrixStack.Top;
+         }
+         else if (mat == STATE_PROJECTION_MATRIX) {
+            matrix = ctx->ProjectionMatrixStack.Top;
+         }
+         else if (mat == STATE_MVP_MATRIX) {
+            matrix = &ctx->_ModelProjectMatrix;
+         }
+         else if (mat == STATE_TEXTURE_MATRIX) {
+            ASSERT(index < Elements(ctx->TextureMatrixStack));
+            matrix = ctx->TextureMatrixStack[index].Top;
+         }
+         else if (mat == STATE_PROGRAM_MATRIX) {
+            ASSERT(index < Elements(ctx->ProgramMatrixStack));
+            matrix = ctx->ProgramMatrixStack[index].Top;
+         }
+         else {
+            _mesa_problem(ctx, "Bad matrix name in _mesa_fetch_state()");
+            return;
+         }
+         if (modifier == STATE_MATRIX_INVERSE ||
+             modifier == STATE_MATRIX_INVTRANS) {
+            /* Be sure inverse is up to date:
+	     */
+            _math_matrix_alloc_inv( (GLmatrix *) matrix );
+	    _math_matrix_analyse( (GLmatrix*) matrix );
+            m = matrix->inv;
+         }
+         else {
+            m = matrix->m;
+         }
+         if (modifier == STATE_MATRIX_TRANSPOSE ||
+             modifier == STATE_MATRIX_INVTRANS) {
+            for (i = 0, row = firstRow; row <= lastRow; row++) {
+               value[i++] = m[row * 4 + 0];
+               value[i++] = m[row * 4 + 1];
+               value[i++] = m[row * 4 + 2];
+               value[i++] = m[row * 4 + 3];
+            }
+         }
+         else {
+            for (i = 0, row = firstRow; row <= lastRow; row++) {
+               value[i++] = m[row + 0];
+               value[i++] = m[row + 4];
+               value[i++] = m[row + 8];
+               value[i++] = m[row + 12];
+            }
+         }
+      }
+      return;
+   case STATE_DEPTH_RANGE:
+      value[0] = ctx->Viewport.Near;                     /* near       */
+      value[1] = ctx->Viewport.Far;                      /* far        */
+      value[2] = ctx->Viewport.Far - ctx->Viewport.Near; /* far - near */
+      value[3] = 1.0;
+      return;
+   case STATE_FRAGMENT_PROGRAM:
+      {
+         /* state[1] = {STATE_ENV, STATE_LOCAL} */
+         /* state[2] = parameter index          */
+         const int idx = (int) state[2];
+         switch (state[1]) {
+            case STATE_ENV:
+               COPY_4V(value, ctx->FragmentProgram.Parameters[idx]);
+               return;
+            case STATE_LOCAL:
+               COPY_4V(value, ctx->FragmentProgram.Current->Base.LocalParams[idx]);
+               return;
+            default:
+               _mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()");
+               return;
+         }
+      }
+      return;
+
+   case STATE_VERTEX_PROGRAM:
+      {
+         /* state[1] = {STATE_ENV, STATE_LOCAL} */
+         /* state[2] = parameter index          */
+         const int idx = (int) state[2];
+         switch (state[1]) {
+            case STATE_ENV:
+               COPY_4V(value, ctx->VertexProgram.Parameters[idx]);
+               return;
+            case STATE_LOCAL:
+               COPY_4V(value, ctx->VertexProgram.Current->Base.LocalParams[idx]);
+               return;
+            default:
+               _mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()");
+               return;
+         }
+      }
+      return;
+
+   case STATE_NORMAL_SCALE:
+      ASSIGN_4V(value, ctx->_ModelViewInvScale, 0, 0, 1);
+      return;
+
+   case STATE_INTERNAL:
+      switch (state[1]) {
+      case STATE_CURRENT_ATTRIB:
+         {
+            const GLuint idx = (GLuint) state[2];
+            COPY_4V(value, ctx->Current.Attrib[idx]);
+         }
+         return;
+
+      case STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED:
+         {
+            const GLuint idx = (GLuint) state[2];
+            if(ctx->Light._ClampVertexColor &&
+               (idx == VERT_ATTRIB_COLOR0 ||
+                idx == VERT_ATTRIB_COLOR1)) {
+               value[0] = CLAMP(ctx->Current.Attrib[idx][0], 0.0f, 1.0f);
+               value[1] = CLAMP(ctx->Current.Attrib[idx][1], 0.0f, 1.0f);
+               value[2] = CLAMP(ctx->Current.Attrib[idx][2], 0.0f, 1.0f);
+               value[3] = CLAMP(ctx->Current.Attrib[idx][3], 0.0f, 1.0f);
+            }
+            else
+               COPY_4V(value, ctx->Current.Attrib[idx]);
+         }
+         return;
+
+      case STATE_NORMAL_SCALE:
+         ASSIGN_4V(value, 
+                   ctx->_ModelViewInvScale, 
+                   ctx->_ModelViewInvScale, 
+                   ctx->_ModelViewInvScale, 
+                   1);
+         return;
+
+      case STATE_TEXRECT_SCALE:
+         /* Value = { 1/texWidth, 1/texHeight, 0, 1 }.
+          * Used to convert unnormalized texcoords to normalized texcoords.
+          */
+         {
+            const int unit = (int) state[2];
+            const struct gl_texture_object *texObj
+               = ctx->Texture.Unit[unit]._Current;
+            if (texObj) {
+               struct gl_texture_image *texImage = texObj->Image[0][0];
+               ASSIGN_4V(value,
+                         (GLfloat) (1.0 / texImage->Width),
+                         (GLfloat) (1.0 / texImage->Height),
+                         0.0f, 1.0f);
+            }
+         }
+         return;
+
+      case STATE_FOG_PARAMS_OPTIMIZED:
+         /* for simpler per-vertex/pixel fog calcs. POW (for EXP/EXP2 fog)
+          * might be more expensive than EX2 on some hw, plus it needs
+          * another constant (e) anyway. Linear fog can now be done with a
+          * single MAD.
+          * linear: fogcoord * -1/(end-start) + end/(end-start)
+          * exp: 2^-(density/ln(2) * fogcoord)
+          * exp2: 2^-((density/(ln(2)^2) * fogcoord)^2)
+          */
+         value[0] = (ctx->Fog.End == ctx->Fog.Start)
+            ? 1.0f : (GLfloat)(-1.0F / (ctx->Fog.End - ctx->Fog.Start));
+         value[1] = ctx->Fog.End * -value[0];
+         value[2] = (GLfloat)(ctx->Fog.Density * ONE_DIV_LN2);
+         value[3] = (GLfloat)(ctx->Fog.Density * ONE_DIV_SQRT_LN2);
+         return;
+
+      case STATE_POINT_SIZE_CLAMPED:
+         {
+           /* this includes implementation dependent limits, to avoid
+            * another potentially necessary clamp.
+            * Note: for sprites, point smooth (point AA) is ignored
+            * and we'll clamp to MinPointSizeAA and MaxPointSize, because we
+            * expect drivers will want to say their minimum for AA size is 0.0
+            * but for non-AA it's 1.0 (because normal points with size below 1.0
+            * need to get rounded up to 1.0, hence never disappear). GL does
+            * not specify max clamp size for sprites, other than it needs to be
+            * at least as large as max AA size, hence use non-AA size there.
+            */
+            GLfloat minImplSize;
+            GLfloat maxImplSize;
+            if (ctx->Point.PointSprite) {
+               minImplSize = ctx->Const.MinPointSizeAA;
+               maxImplSize = ctx->Const.MaxPointSize;
+            }
+            else if (ctx->Point.SmoothFlag || ctx->Multisample._Enabled) {
+               minImplSize = ctx->Const.MinPointSizeAA;
+               maxImplSize = ctx->Const.MaxPointSizeAA;
+            }
+            else {
+               minImplSize = ctx->Const.MinPointSize;
+               maxImplSize = ctx->Const.MaxPointSize;
+            }
+            value[0] = ctx->Point.Size;
+            value[1] = ctx->Point.MinSize >= minImplSize ? ctx->Point.MinSize : minImplSize;
+            value[2] = ctx->Point.MaxSize <= maxImplSize ? ctx->Point.MaxSize : maxImplSize;
+            value[3] = ctx->Point.Threshold;
+         }
+         return;
+      case STATE_POINT_SIZE_IMPL_CLAMP:
+         {
+           /* for implementation clamp only in vs */
+            GLfloat minImplSize;
+            GLfloat maxImplSize;
+            if (ctx->Point.PointSprite) {
+               minImplSize = ctx->Const.MinPointSizeAA;
+               maxImplSize = ctx->Const.MaxPointSize;
+            }
+            else if (ctx->Point.SmoothFlag || ctx->Multisample._Enabled) {
+               minImplSize = ctx->Const.MinPointSizeAA;
+               maxImplSize = ctx->Const.MaxPointSizeAA;
+            }
+            else {
+               minImplSize = ctx->Const.MinPointSize;
+               maxImplSize = ctx->Const.MaxPointSize;
+            }
+            value[0] = ctx->Point.Size;
+            value[1] = minImplSize;
+            value[2] = maxImplSize;
+            value[3] = ctx->Point.Threshold;
+         }
+         return;
+      case STATE_LIGHT_SPOT_DIR_NORMALIZED:
+         {
+            /* here, state[2] is the light number */
+            /* pre-normalize spot dir */
+            const GLuint ln = (GLuint) state[2];
+            COPY_3V(value, ctx->Light.Light[ln]._NormSpotDirection);
+            value[3] = ctx->Light.Light[ln]._CosCutoff;
+         }
+         return;
+
+      case STATE_LIGHT_POSITION:
+         {
+            const GLuint ln = (GLuint) state[2];
+            COPY_4V(value, ctx->Light.Light[ln]._Position);
+         }
+         return;
+
+      case STATE_LIGHT_POSITION_NORMALIZED:
+         {
+            const GLuint ln = (GLuint) state[2];
+            COPY_4V(value, ctx->Light.Light[ln]._Position);
+            NORMALIZE_3FV( value );
+         }
+         return;
+
+      case STATE_LIGHT_HALF_VECTOR:
+         {
+            const GLuint ln = (GLuint) state[2];
+            GLfloat p[3];
+            /* Compute infinite half angle vector:
+             *   halfVector = normalize(normalize(lightPos) + (0, 0, 1))
+             * light.EyePosition.w should be 0 for infinite lights.
+             */
+            COPY_3V(p, ctx->Light.Light[ln]._Position);
+            NORMALIZE_3FV(p);
+            ADD_3V(value, p, ctx->_EyeZDir);
+            NORMALIZE_3FV(value);
+            value[3] = 1.0;
+         }
+         return;
+
+      case STATE_PT_SCALE:
+         value[0] = ctx->Pixel.RedScale;
+         value[1] = ctx->Pixel.GreenScale;
+         value[2] = ctx->Pixel.BlueScale;
+         value[3] = ctx->Pixel.AlphaScale;
+         return;
+
+      case STATE_PT_BIAS:
+         value[0] = ctx->Pixel.RedBias;
+         value[1] = ctx->Pixel.GreenBias;
+         value[2] = ctx->Pixel.BlueBias;
+         value[3] = ctx->Pixel.AlphaBias;
+         return;
+
+      case STATE_SHADOW_AMBIENT:
+         {
+            const int unit = (int) state[2];
+            const struct gl_texture_object *texObj
+               = ctx->Texture.Unit[unit]._Current;
+            if (texObj) {
+               value[0] =
+               value[1] =
+               value[2] =
+               value[3] = texObj->CompareFailValue;
+            }
+         }
+         return;
+
+      case STATE_FB_SIZE:
+         value[0] = (GLfloat) (ctx->DrawBuffer->Width - 1);
+         value[1] = (GLfloat) (ctx->DrawBuffer->Height - 1);
+         value[2] = 0.0F;
+         value[3] = 0.0F;
+         return;
+
+      case STATE_FB_WPOS_Y_TRANSFORM:
+         /* A driver may negate this conditional by using ZW swizzle
+          * instead of XY (based on e.g. some other state). */
+         if (ctx->DrawBuffer->Name != 0) {
+            /* Identity (XY) followed by flipping Y upside down (ZW). */
+            value[0] = 1.0F;
+            value[1] = 0.0F;
+            value[2] = -1.0F;
+            value[3] = (GLfloat) (ctx->DrawBuffer->Height - 1);
+         } else {
+            /* Flipping Y upside down (XY) followed by identity (ZW). */
+            value[0] = -1.0F;
+            value[1] = (GLfloat) (ctx->DrawBuffer->Height - 1);
+            value[2] = 1.0F;
+            value[3] = 0.0F;
+         }
+         return;
+
+      case STATE_ROT_MATRIX_0:
+         {
+            const int unit = (int) state[2];
+            GLfloat *rotMat22 = ctx->Texture.Unit[unit].RotMatrix;
+            value[0] = rotMat22[0]; 
+            value[1] = rotMat22[2];
+            value[2] = 0.0;
+            value[3] = 0.0;
+         }
+         return;
+
+      case STATE_ROT_MATRIX_1:
+         {
+            const int unit = (int) state[2];
+            GLfloat *rotMat22 = ctx->Texture.Unit[unit].RotMatrix;
+            value[0] = rotMat22[1];
+            value[1] = rotMat22[3];
+            value[2] = 0.0;
+            value[3] = 0.0;
+         }
+         return;
+
+      /* XXX: make sure new tokens added here are also handled in the 
+       * _mesa_program_state_flags() switch, below.
+       */
+      default:
+         /* Unknown state indexes are silently ignored here.
+          * Drivers may do something special.
+          */
+         return;
+      }
+      return;
+
+   default:
+      _mesa_problem(ctx, "Invalid state in _mesa_fetch_state");
+      return;
+   }
+}
+
+
+/**
+ * Return a bitmask of the Mesa state flags (_NEW_* values) which would
+ * indicate that the given context state may have changed.
+ * The bitmask is used during validation to determine if we need to update
+ * vertex/fragment program parameters (like "state.material.color") when
+ * some GL state has changed.
+ */
+GLbitfield
+_mesa_program_state_flags(const gl_state_index state[STATE_LENGTH])
+{
+   switch (state[0]) {
+   case STATE_MATERIAL:
+   case STATE_LIGHT:
+   case STATE_LIGHTMODEL_AMBIENT:
+   case STATE_LIGHTMODEL_SCENECOLOR:
+   case STATE_LIGHTPROD:
+      return _NEW_LIGHT;
+
+   case STATE_TEXGEN:
+      return _NEW_TEXTURE;
+   case STATE_TEXENV_COLOR:
+      return _NEW_TEXTURE | _NEW_BUFFERS | _NEW_FRAG_CLAMP;
+
+   case STATE_FOG_COLOR:
+      return _NEW_FOG | _NEW_BUFFERS | _NEW_FRAG_CLAMP;
+   case STATE_FOG_PARAMS:
+      return _NEW_FOG;
+
+   case STATE_CLIPPLANE:
+      return _NEW_TRANSFORM;
+
+   case STATE_POINT_SIZE:
+   case STATE_POINT_ATTENUATION:
+      return _NEW_POINT;
+
+   case STATE_MODELVIEW_MATRIX:
+      return _NEW_MODELVIEW;
+   case STATE_PROJECTION_MATRIX:
+      return _NEW_PROJECTION;
+   case STATE_MVP_MATRIX:
+      return _NEW_MODELVIEW | _NEW_PROJECTION;
+   case STATE_TEXTURE_MATRIX:
+      return _NEW_TEXTURE_MATRIX;
+   case STATE_PROGRAM_MATRIX:
+      return _NEW_TRACK_MATRIX;
+
+   case STATE_DEPTH_RANGE:
+      return _NEW_VIEWPORT;
+
+   case STATE_FRAGMENT_PROGRAM:
+   case STATE_VERTEX_PROGRAM:
+      return _NEW_PROGRAM;
+
+   case STATE_NORMAL_SCALE:
+      return _NEW_MODELVIEW;
+
+   case STATE_INTERNAL:
+      switch (state[1]) {
+      case STATE_CURRENT_ATTRIB:
+         return _NEW_CURRENT_ATTRIB;
+      case STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED:
+         return _NEW_CURRENT_ATTRIB | _NEW_LIGHT | _NEW_BUFFERS;
+
+      case STATE_NORMAL_SCALE:
+         return _NEW_MODELVIEW;
+
+      case STATE_TEXRECT_SCALE:
+      case STATE_SHADOW_AMBIENT:
+      case STATE_ROT_MATRIX_0:
+      case STATE_ROT_MATRIX_1:
+	 return _NEW_TEXTURE;
+      case STATE_FOG_PARAMS_OPTIMIZED:
+	 return _NEW_FOG;
+      case STATE_POINT_SIZE_CLAMPED:
+      case STATE_POINT_SIZE_IMPL_CLAMP:
+         return _NEW_POINT | _NEW_MULTISAMPLE;
+      case STATE_LIGHT_SPOT_DIR_NORMALIZED:
+      case STATE_LIGHT_POSITION:
+      case STATE_LIGHT_POSITION_NORMALIZED:
+      case STATE_LIGHT_HALF_VECTOR:
+         return _NEW_LIGHT;
+
+      case STATE_PT_SCALE:
+      case STATE_PT_BIAS:
+         return _NEW_PIXEL;
+
+      case STATE_FB_SIZE:
+      case STATE_FB_WPOS_Y_TRANSFORM:
+         return _NEW_BUFFERS;
+
+      default:
+         /* unknown state indexes are silently ignored and
+         *  no flag set, since it is handled by the driver.
+         */
+	 return 0;
+      }
+
+   default:
+      _mesa_problem(NULL, "unexpected state[0] in make_state_flags()");
+      return 0;
+   }
+}
+
+
+static void
+append(char *dst, const char *src)
+{
+   while (*dst)
+      dst++;
+   while (*src)
+     *dst++ = *src++;
+   *dst = 0;
+}
+
+
+/**
+ * Convert token 'k' to a string, append it onto 'dst' string.
+ */
+static void
+append_token(char *dst, gl_state_index k)
+{
+   switch (k) {
+   case STATE_MATERIAL:
+      append(dst, "material");
+      break;
+   case STATE_LIGHT:
+      append(dst, "light");
+      break;
+   case STATE_LIGHTMODEL_AMBIENT:
+      append(dst, "lightmodel.ambient");
+      break;
+   case STATE_LIGHTMODEL_SCENECOLOR:
+      break;
+   case STATE_LIGHTPROD:
+      append(dst, "lightprod");
+      break;
+   case STATE_TEXGEN:
+      append(dst, "texgen");
+      break;
+   case STATE_FOG_COLOR:
+      append(dst, "fog.color");
+      break;
+   case STATE_FOG_PARAMS:
+      append(dst, "fog.params");
+      break;
+   case STATE_CLIPPLANE:
+      append(dst, "clip");
+      break;
+   case STATE_POINT_SIZE:
+      append(dst, "point.size");
+      break;
+   case STATE_POINT_ATTENUATION:
+      append(dst, "point.attenuation");
+      break;
+   case STATE_MODELVIEW_MATRIX:
+      append(dst, "matrix.modelview");
+      break;
+   case STATE_PROJECTION_MATRIX:
+      append(dst, "matrix.projection");
+      break;
+   case STATE_MVP_MATRIX:
+      append(dst, "matrix.mvp");
+      break;
+   case STATE_TEXTURE_MATRIX:
+      append(dst, "matrix.texture");
+      break;
+   case STATE_PROGRAM_MATRIX:
+      append(dst, "matrix.program");
+      break;
+   case STATE_MATRIX_INVERSE:
+      append(dst, ".inverse");
+      break;
+   case STATE_MATRIX_TRANSPOSE:
+      append(dst, ".transpose");
+      break;
+   case STATE_MATRIX_INVTRANS:
+      append(dst, ".invtrans");
+      break;
+   case STATE_AMBIENT:
+      append(dst, ".ambient");
+      break;
+   case STATE_DIFFUSE:
+      append(dst, ".diffuse");
+      break;
+   case STATE_SPECULAR:
+      append(dst, ".specular");
+      break;
+   case STATE_EMISSION:
+      append(dst, ".emission");
+      break;
+   case STATE_SHININESS:
+      append(dst, "lshininess");
+      break;
+   case STATE_HALF_VECTOR:
+      append(dst, ".half");
+      break;
+   case STATE_POSITION:
+      append(dst, ".position");
+      break;
+   case STATE_ATTENUATION:
+      append(dst, ".attenuation");
+      break;
+   case STATE_SPOT_DIRECTION:
+      append(dst, ".spot.direction");
+      break;
+   case STATE_SPOT_CUTOFF:
+      append(dst, ".spot.cutoff");
+      break;
+   case STATE_TEXGEN_EYE_S:
+      append(dst, ".eye.s");
+      break;
+   case STATE_TEXGEN_EYE_T:
+      append(dst, ".eye.t");
+      break;
+   case STATE_TEXGEN_EYE_R:
+      append(dst, ".eye.r");
+      break;
+   case STATE_TEXGEN_EYE_Q:
+      append(dst, ".eye.q");
+      break;
+   case STATE_TEXGEN_OBJECT_S:
+      append(dst, ".object.s");
+      break;
+   case STATE_TEXGEN_OBJECT_T:
+      append(dst, ".object.t");
+      break;
+   case STATE_TEXGEN_OBJECT_R:
+      append(dst, ".object.r");
+      break;
+   case STATE_TEXGEN_OBJECT_Q:
+      append(dst, ".object.q");
+      break;
+   case STATE_TEXENV_COLOR:
+      append(dst, "texenv");
+      break;
+   case STATE_DEPTH_RANGE:
+      append(dst, "depth.range");
+      break;
+   case STATE_VERTEX_PROGRAM:
+   case STATE_FRAGMENT_PROGRAM:
+      break;
+   case STATE_ENV:
+      append(dst, "env");
+      break;
+   case STATE_LOCAL:
+      append(dst, "local");
+      break;
+   /* BEGIN internal state vars */
+   case STATE_INTERNAL:
+      append(dst, ".internal.");
+      break;
+   case STATE_CURRENT_ATTRIB:
+      append(dst, "current");
+      break;
+   case STATE_NORMAL_SCALE:
+      append(dst, "normalScale");
+      break;
+   case STATE_TEXRECT_SCALE:
+      append(dst, "texrectScale");
+      break;
+   case STATE_FOG_PARAMS_OPTIMIZED:
+      append(dst, "fogParamsOptimized");
+      break;
+   case STATE_POINT_SIZE_CLAMPED:
+      append(dst, "pointSizeClamped");
+      break;
+   case STATE_POINT_SIZE_IMPL_CLAMP:
+      append(dst, "pointSizeImplClamp");
+      break;
+   case STATE_LIGHT_SPOT_DIR_NORMALIZED:
+      append(dst, "lightSpotDirNormalized");
+      break;
+   case STATE_LIGHT_POSITION:
+      append(dst, "lightPosition");
+      break;
+   case STATE_LIGHT_POSITION_NORMALIZED:
+      append(dst, "light.position.normalized");
+      break;
+   case STATE_LIGHT_HALF_VECTOR:
+      append(dst, "lightHalfVector");
+      break;
+   case STATE_PT_SCALE:
+      append(dst, "PTscale");
+      break;
+   case STATE_PT_BIAS:
+      append(dst, "PTbias");
+      break;
+   case STATE_SHADOW_AMBIENT:
+      append(dst, "CompareFailValue");
+      break;
+   case STATE_FB_SIZE:
+      append(dst, "FbSize");
+      break;
+   case STATE_FB_WPOS_Y_TRANSFORM:
+      append(dst, "FbWposYTransform");
+      break;
+   case STATE_ROT_MATRIX_0:
+      append(dst, "rotMatrixRow0");
+      break;
+   case STATE_ROT_MATRIX_1:
+      append(dst, "rotMatrixRow1");
+      break;
+   default:
+      /* probably STATE_INTERNAL_DRIVER+i (driver private state) */
+      append(dst, "driverState");
+   }
+}
+
+static void
+append_face(char *dst, GLint face)
+{
+   if (face == 0)
+      append(dst, "front.");
+   else
+      append(dst, "back.");
+}
+
+static void
+append_index(char *dst, GLint index)
+{
+   char s[20];
+   sprintf(s, "[%d]", index);
+   append(dst, s);
+}
+
+/**
+ * Make a string from the given state vector.
+ * For example, return "state.matrix.texture[2].inverse".
+ * Use free() to deallocate the string.
+ */
+char *
+_mesa_program_state_string(const gl_state_index state[STATE_LENGTH])
+{
+   char str[1000] = "";
+   char tmp[30];
+
+   append(str, "state.");
+   append_token(str, state[0]);
+
+   switch (state[0]) {
+   case STATE_MATERIAL:
+      append_face(str, state[1]);
+      append_token(str, state[2]);
+      break;
+   case STATE_LIGHT:
+      append_index(str, state[1]); /* light number [i]. */
+      append_token(str, state[2]); /* coefficients */
+      break;
+   case STATE_LIGHTMODEL_AMBIENT:
+      append(str, "lightmodel.ambient");
+      break;
+   case STATE_LIGHTMODEL_SCENECOLOR:
+      if (state[1] == 0) {
+         append(str, "lightmodel.front.scenecolor");
+      }
+      else {
+         append(str, "lightmodel.back.scenecolor");
+      }
+      break;
+   case STATE_LIGHTPROD:
+      append_index(str, state[1]); /* light number [i]. */
+      append_face(str, state[2]);
+      append_token(str, state[3]);
+      break;
+   case STATE_TEXGEN:
+      append_index(str, state[1]); /* tex unit [i] */
+      append_token(str, state[2]); /* plane coef */
+      break;
+   case STATE_TEXENV_COLOR:
+      append_index(str, state[1]); /* tex unit [i] */
+      append(str, "color");
+      break;
+   case STATE_CLIPPLANE:
+      append_index(str, state[1]); /* plane [i] */
+      append(str, ".plane");
+      break;
+   case STATE_MODELVIEW_MATRIX:
+   case STATE_PROJECTION_MATRIX:
+   case STATE_MVP_MATRIX:
+   case STATE_TEXTURE_MATRIX:
+   case STATE_PROGRAM_MATRIX:
+      {
+         /* state[0] = modelview, projection, texture, etc. */
+         /* state[1] = which texture matrix or program matrix */
+         /* state[2] = first row to fetch */
+         /* state[3] = last row to fetch */
+         /* state[4] = transpose, inverse or invtrans */
+         const gl_state_index mat = state[0];
+         const GLuint index = (GLuint) state[1];
+         const GLuint firstRow = (GLuint) state[2];
+         const GLuint lastRow = (GLuint) state[3];
+         const gl_state_index modifier = state[4];
+         if (index ||
+             mat == STATE_TEXTURE_MATRIX ||
+             mat == STATE_PROGRAM_MATRIX)
+            append_index(str, index);
+         if (modifier)
+            append_token(str, modifier);
+         if (firstRow == lastRow)
+            sprintf(tmp, ".row[%d]", firstRow);
+         else
+            sprintf(tmp, ".row[%d..%d]", firstRow, lastRow);
+         append(str, tmp);
+      }
+      break;
+   case STATE_POINT_SIZE:
+      break;
+   case STATE_POINT_ATTENUATION:
+      break;
+   case STATE_FOG_PARAMS:
+      break;
+   case STATE_FOG_COLOR:
+      break;
+   case STATE_DEPTH_RANGE:
+      break;
+   case STATE_FRAGMENT_PROGRAM:
+   case STATE_VERTEX_PROGRAM:
+      /* state[1] = {STATE_ENV, STATE_LOCAL} */
+      /* state[2] = parameter index          */
+      append_token(str, state[1]);
+      append_index(str, state[2]);
+      break;
+   case STATE_NORMAL_SCALE:
+      break;
+   case STATE_INTERNAL:
+      append_token(str, state[1]);
+      if (state[1] == STATE_CURRENT_ATTRIB)
+         append_index(str, state[2]);
+       break;
+   default:
+      _mesa_problem(NULL, "Invalid state in _mesa_program_state_string");
+      break;
+   }
+
+   return _mesa_strdup(str);
+}
+
+
+/**
+ * Loop over all the parameters in a parameter list.  If the parameter
+ * is a GL state reference, look up the current value of that state
+ * variable and put it into the parameter's Value[4] array.
+ * Other parameter types never change or are explicitly set by the user
+ * with glUniform() or glProgramParameter(), etc.
+ * This would be called at glBegin time.
+ */
+void
+_mesa_load_state_parameters(struct gl_context *ctx,
+                            struct gl_program_parameter_list *paramList)
+{
+   GLuint i;
+
+   if (!paramList)
+      return;
+
+   for (i = 0; i < paramList->NumParameters; i++) {
+      if (paramList->Parameters[i].Type == PROGRAM_STATE_VAR) {
+         _mesa_fetch_state(ctx,
+			   paramList->Parameters[i].StateIndexes,
+                           paramList->ParameterValues[i]);
+      }
+   }
+}
+
+
+/**
+ * Copy the 16 elements of a matrix into four consecutive program
+ * registers starting at 'pos'.
+ */
+static void
+load_matrix(GLfloat registers[][4], GLuint pos, const GLfloat mat[16])
+{
+   GLuint i;
+   for (i = 0; i < 4; i++) {
+      registers[pos + i][0] = mat[0 + i];
+      registers[pos + i][1] = mat[4 + i];
+      registers[pos + i][2] = mat[8 + i];
+      registers[pos + i][3] = mat[12 + i];
+   }
+}
+
+
+/**
+ * As above, but transpose the matrix.
+ */
+static void
+load_transpose_matrix(GLfloat registers[][4], GLuint pos,
+                      const GLfloat mat[16])
+{
+   memcpy(registers[pos], mat, 16 * sizeof(GLfloat));
+}
+
+
+/**
+ * Load current vertex program's parameter registers with tracked
+ * matrices (if NV program).  This only needs to be done per
+ * glBegin/glEnd, not per-vertex.
+ */
+void
+_mesa_load_tracked_matrices(struct gl_context *ctx)
+{
+   GLuint i;
+
+   for (i = 0; i < MAX_NV_VERTEX_PROGRAM_PARAMS / 4; i++) {
+      /* point 'mat' at source matrix */
+      GLmatrix *mat;
+      if (ctx->VertexProgram.TrackMatrix[i] == GL_MODELVIEW) {
+         mat = ctx->ModelviewMatrixStack.Top;
+      }
+      else if (ctx->VertexProgram.TrackMatrix[i] == GL_PROJECTION) {
+         mat = ctx->ProjectionMatrixStack.Top;
+      }
+      else if (ctx->VertexProgram.TrackMatrix[i] == GL_TEXTURE) {
+         GLuint unit = MIN2(ctx->Texture.CurrentUnit,
+                            Elements(ctx->TextureMatrixStack) - 1);
+         mat = ctx->TextureMatrixStack[unit].Top;
+      }
+      else if (ctx->VertexProgram.TrackMatrix[i]==GL_MODELVIEW_PROJECTION_NV) {
+         /* XXX verify the combined matrix is up to date */
+         mat = &ctx->_ModelProjectMatrix;
+      }
+      else if (ctx->VertexProgram.TrackMatrix[i] >= GL_MATRIX0_NV &&
+               ctx->VertexProgram.TrackMatrix[i] <= GL_MATRIX7_NV) {
+         GLuint n = ctx->VertexProgram.TrackMatrix[i] - GL_MATRIX0_NV;
+         ASSERT(n < Elements(ctx->ProgramMatrixStack));
+         mat = ctx->ProgramMatrixStack[n].Top;
+      }
+      else {
+         /* no matrix is tracked, but we leave the register values as-is */
+         assert(ctx->VertexProgram.TrackMatrix[i] == GL_NONE);
+         continue;
+      }
+
+      /* load the matrix values into sequential registers */
+      if (ctx->VertexProgram.TrackMatrixTransform[i] == GL_IDENTITY_NV) {
+         load_matrix(ctx->VertexProgram.Parameters, i*4, mat->m);
+      }
+      else if (ctx->VertexProgram.TrackMatrixTransform[i] == GL_INVERSE_NV) {
+         _math_matrix_analyse(mat); /* update the inverse */
+         ASSERT(!_math_matrix_is_dirty(mat));
+         load_matrix(ctx->VertexProgram.Parameters, i*4, mat->inv);
+      }
+      else if (ctx->VertexProgram.TrackMatrixTransform[i] == GL_TRANSPOSE_NV) {
+         load_transpose_matrix(ctx->VertexProgram.Parameters, i*4, mat->m);
+      }
+      else {
+         assert(ctx->VertexProgram.TrackMatrixTransform[i]
+                == GL_INVERSE_TRANSPOSE_NV);
+         _math_matrix_analyse(mat); /* update the inverse */
+         ASSERT(!_math_matrix_is_dirty(mat));
+         load_transpose_matrix(ctx->VertexProgram.Parameters, i*4, mat->inv);
+      }
+   }
+}
diff --git a/mesalib/src/mesa/program/prog_statevars.h b/mesalib/src/mesa/program/prog_statevars.h
index a92b77855..9fe8d81b3 100644
--- a/mesalib/src/mesa/program/prog_statevars.h
+++ b/mesalib/src/mesa/program/prog_statevars.h
@@ -1,147 +1,148 @@
-/*

- * Mesa 3-D graphics library

- * Version:  7.1

- *

- * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.

- *

- * 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 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

- * BRIAN PAUL 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.

- */

-

-#ifndef PROG_STATEVARS_H

-#define PROG_STATEVARS_H

-

-#include "main/glheader.h"

-

-struct gl_context;

-struct gl_program_parameter_list;

-

-/**

- * Number of STATE_* values we need to address any GL state.

- * Used to dimension arrays.

- */

-#define STATE_LENGTH 5

-

-

-/**

- * Used for describing GL state referenced from inside ARB vertex and

- * fragment programs.

- * A string such as "state.light[0].ambient" gets translated into a

- * sequence of tokens such as [ STATE_LIGHT, 0, STATE_AMBIENT ].

- *

- * For state that's an array, like STATE_CLIPPLANE, the 2nd token [1] should

- * always be the array index.

- */

-typedef enum gl_state_index_ {

-   STATE_MATERIAL = 100,  /* start at 100 so small ints are seen as ints */

-

-   STATE_LIGHT,

-   STATE_LIGHTMODEL_AMBIENT,

-   STATE_LIGHTMODEL_SCENECOLOR,

-   STATE_LIGHTPROD,

-

-   STATE_TEXGEN,

-

-   STATE_FOG_COLOR,

-   STATE_FOG_PARAMS,

-

-   STATE_CLIPPLANE,

-

-   STATE_POINT_SIZE,

-   STATE_POINT_ATTENUATION,

-

-   STATE_MODELVIEW_MATRIX,

-   STATE_PROJECTION_MATRIX,

-   STATE_MVP_MATRIX,

-   STATE_TEXTURE_MATRIX,

-   STATE_PROGRAM_MATRIX,

-   STATE_MATRIX_INVERSE,

-   STATE_MATRIX_TRANSPOSE,

-   STATE_MATRIX_INVTRANS,

-

-   STATE_AMBIENT,

-   STATE_DIFFUSE,

-   STATE_SPECULAR,

-   STATE_EMISSION,

-   STATE_SHININESS,

-   STATE_HALF_VECTOR,

-

-   STATE_POSITION,       /**< xyzw = position */

-   STATE_ATTENUATION,    /**< xyz = attenuation, w = spot exponent */

-   STATE_SPOT_DIRECTION, /**< xyz = direction, w = cos(cutoff) */

-   STATE_SPOT_CUTOFF,    /**< x = cutoff, yzw = undefined */

-

-   STATE_TEXGEN_EYE_S,

-   STATE_TEXGEN_EYE_T,

-   STATE_TEXGEN_EYE_R,

-   STATE_TEXGEN_EYE_Q,

-   STATE_TEXGEN_OBJECT_S,

-   STATE_TEXGEN_OBJECT_T,

-   STATE_TEXGEN_OBJECT_R,

-   STATE_TEXGEN_OBJECT_Q,

-

-   STATE_TEXENV_COLOR,

-

-   STATE_DEPTH_RANGE,

-

-   STATE_VERTEX_PROGRAM,

-   STATE_FRAGMENT_PROGRAM,

-

-   STATE_ENV,

-   STATE_LOCAL,

-

-   STATE_INTERNAL,		/* Mesa additions */

-   STATE_CURRENT_ATTRIB,        /* ctx->Current vertex attrib value */

-   STATE_NORMAL_SCALE,

-   STATE_TEXRECT_SCALE,

-   STATE_FOG_PARAMS_OPTIMIZED,  /* for faster fog calc */

-   STATE_POINT_SIZE_CLAMPED,    /* includes implementation dependent size clamp */

-   STATE_POINT_SIZE_IMPL_CLAMP, /* for implementation clamp only in vs */

-   STATE_LIGHT_SPOT_DIR_NORMALIZED,   /* pre-normalized spot dir */

-   STATE_LIGHT_POSITION,              /* object vs eye space */

-   STATE_LIGHT_POSITION_NORMALIZED,   /* object vs eye space */

-   STATE_LIGHT_HALF_VECTOR,           /* object vs eye space */

-   STATE_PT_SCALE,              /**< Pixel transfer RGBA scale */

-   STATE_PT_BIAS,               /**< Pixel transfer RGBA bias */

-   STATE_SHADOW_AMBIENT,        /**< ARB_shadow_ambient fail value; token[2] is texture unit index */

-   STATE_FB_SIZE,               /**< (width-1, height-1, 0, 0) */

-   STATE_FB_WPOS_Y_TRANSFORM,   /**< (1, 0, -1, height-1) if a FBO is bound, (-1, height-1, 1, 0) otherwise */

-   STATE_ROT_MATRIX_0,          /**< ATI_envmap_bumpmap, rot matrix row 0 */

-   STATE_ROT_MATRIX_1,          /**< ATI_envmap_bumpmap, rot matrix row 1 */

-   STATE_INTERNAL_DRIVER	/* first available state index for drivers (must be last) */

-} gl_state_index;

-

-

-

-extern void

-_mesa_load_state_parameters(struct gl_context *ctx,

-                            struct gl_program_parameter_list *paramList);

-

-

-extern GLbitfield

-_mesa_program_state_flags(const gl_state_index state[STATE_LENGTH]);

-

-

-extern char *

-_mesa_program_state_string(const gl_state_index state[STATE_LENGTH]);

-

-

-extern void

-_mesa_load_tracked_matrices(struct gl_context *ctx);

-

-

-#endif /* PROG_STATEVARS_H */

+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
+ *
+ * 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 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
+ * BRIAN PAUL 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.
+ */
+
+#ifndef PROG_STATEVARS_H
+#define PROG_STATEVARS_H
+
+#include "main/glheader.h"
+
+struct gl_context;
+struct gl_program_parameter_list;
+
+/**
+ * Number of STATE_* values we need to address any GL state.
+ * Used to dimension arrays.
+ */
+#define STATE_LENGTH 5
+
+
+/**
+ * Used for describing GL state referenced from inside ARB vertex and
+ * fragment programs.
+ * A string such as "state.light[0].ambient" gets translated into a
+ * sequence of tokens such as [ STATE_LIGHT, 0, STATE_AMBIENT ].
+ *
+ * For state that's an array, like STATE_CLIPPLANE, the 2nd token [1] should
+ * always be the array index.
+ */
+typedef enum gl_state_index_ {
+   STATE_MATERIAL = 100,  /* start at 100 so small ints are seen as ints */
+
+   STATE_LIGHT,
+   STATE_LIGHTMODEL_AMBIENT,
+   STATE_LIGHTMODEL_SCENECOLOR,
+   STATE_LIGHTPROD,
+
+   STATE_TEXGEN,
+
+   STATE_FOG_COLOR,
+   STATE_FOG_PARAMS,
+
+   STATE_CLIPPLANE,
+
+   STATE_POINT_SIZE,
+   STATE_POINT_ATTENUATION,
+
+   STATE_MODELVIEW_MATRIX,
+   STATE_PROJECTION_MATRIX,
+   STATE_MVP_MATRIX,
+   STATE_TEXTURE_MATRIX,
+   STATE_PROGRAM_MATRIX,
+   STATE_MATRIX_INVERSE,
+   STATE_MATRIX_TRANSPOSE,
+   STATE_MATRIX_INVTRANS,
+
+   STATE_AMBIENT,
+   STATE_DIFFUSE,
+   STATE_SPECULAR,
+   STATE_EMISSION,
+   STATE_SHININESS,
+   STATE_HALF_VECTOR,
+
+   STATE_POSITION,       /**< xyzw = position */
+   STATE_ATTENUATION,    /**< xyz = attenuation, w = spot exponent */
+   STATE_SPOT_DIRECTION, /**< xyz = direction, w = cos(cutoff) */
+   STATE_SPOT_CUTOFF,    /**< x = cutoff, yzw = undefined */
+
+   STATE_TEXGEN_EYE_S,
+   STATE_TEXGEN_EYE_T,
+   STATE_TEXGEN_EYE_R,
+   STATE_TEXGEN_EYE_Q,
+   STATE_TEXGEN_OBJECT_S,
+   STATE_TEXGEN_OBJECT_T,
+   STATE_TEXGEN_OBJECT_R,
+   STATE_TEXGEN_OBJECT_Q,
+
+   STATE_TEXENV_COLOR,
+
+   STATE_DEPTH_RANGE,
+
+   STATE_VERTEX_PROGRAM,
+   STATE_FRAGMENT_PROGRAM,
+
+   STATE_ENV,
+   STATE_LOCAL,
+
+   STATE_INTERNAL,		/* Mesa additions */
+   STATE_CURRENT_ATTRIB,        /* ctx->Current vertex attrib value */
+   STATE_CURRENT_ATTRIB_MAYBE_VP_CLAMPED,        /* ctx->Current vertex attrib value after passthrough vertex processing */
+   STATE_NORMAL_SCALE,
+   STATE_TEXRECT_SCALE,
+   STATE_FOG_PARAMS_OPTIMIZED,  /* for faster fog calc */
+   STATE_POINT_SIZE_CLAMPED,    /* includes implementation dependent size clamp */
+   STATE_POINT_SIZE_IMPL_CLAMP, /* for implementation clamp only in vs */
+   STATE_LIGHT_SPOT_DIR_NORMALIZED,   /* pre-normalized spot dir */
+   STATE_LIGHT_POSITION,              /* object vs eye space */
+   STATE_LIGHT_POSITION_NORMALIZED,   /* object vs eye space */
+   STATE_LIGHT_HALF_VECTOR,           /* object vs eye space */
+   STATE_PT_SCALE,              /**< Pixel transfer RGBA scale */
+   STATE_PT_BIAS,               /**< Pixel transfer RGBA bias */
+   STATE_SHADOW_AMBIENT,        /**< ARB_shadow_ambient fail value; token[2] is texture unit index */
+   STATE_FB_SIZE,               /**< (width-1, height-1, 0, 0) */
+   STATE_FB_WPOS_Y_TRANSFORM,   /**< (1, 0, -1, height-1) if a FBO is bound, (-1, height-1, 1, 0) otherwise */
+   STATE_ROT_MATRIX_0,          /**< ATI_envmap_bumpmap, rot matrix row 0 */
+   STATE_ROT_MATRIX_1,          /**< ATI_envmap_bumpmap, rot matrix row 1 */
+   STATE_INTERNAL_DRIVER	/* first available state index for drivers (must be last) */
+} gl_state_index;
+
+
+
+extern void
+_mesa_load_state_parameters(struct gl_context *ctx,
+                            struct gl_program_parameter_list *paramList);
+
+
+extern GLbitfield
+_mesa_program_state_flags(const gl_state_index state[STATE_LENGTH]);
+
+
+extern char *
+_mesa_program_state_string(const gl_state_index state[STATE_LENGTH]);
+
+
+extern void
+_mesa_load_tracked_matrices(struct gl_context *ctx);
+
+
+#endif /* PROG_STATEVARS_H */
diff --git a/mesalib/src/mesa/program/programopt.c b/mesalib/src/mesa/program/programopt.c
index 6601f7416..5ad9571f7 100644
--- a/mesalib/src/mesa/program/programopt.c
+++ b/mesalib/src/mesa/program/programopt.c
@@ -1,669 +1,670 @@
-/*

- * Mesa 3-D graphics library

- * Version:  6.5.3

- *

- * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.

- *

- * 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 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

- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

- */

-

-/**

- * \file  programopt.c 

- * Vertex/Fragment program optimizations and transformations for program

- * options, etc.

- *

- * \author Brian Paul

- */

-

-

-#include "main/glheader.h"

-#include "main/context.h"

-#include "prog_parameter.h"

-#include "prog_statevars.h"

-#include "program.h"

-#include "programopt.h"

-#include "prog_instruction.h"

-

-

-/**

- * This function inserts instructions for coordinate modelview * projection

- * into a vertex program.

- * May be used to implement the position_invariant option.

- */

-static void

-_mesa_insert_mvp_dp4_code(struct gl_context *ctx, struct gl_vertex_program *vprog)

-{

-   struct prog_instruction *newInst;

-   const GLuint origLen = vprog->Base.NumInstructions;

-   const GLuint newLen = origLen + 4;

-   GLuint i;

-

-   /*

-    * Setup state references for the modelview/projection matrix.

-    * XXX we should check if these state vars are already declared.

-    */

-   static const gl_state_index mvpState[4][STATE_LENGTH] = {

-      { STATE_MVP_MATRIX, 0, 0, 0, 0 },  /* state.matrix.mvp.row[0] */

-      { STATE_MVP_MATRIX, 0, 1, 1, 0 },  /* state.matrix.mvp.row[1] */

-      { STATE_MVP_MATRIX, 0, 2, 2, 0 },  /* state.matrix.mvp.row[2] */

-      { STATE_MVP_MATRIX, 0, 3, 3, 0 },  /* state.matrix.mvp.row[3] */

-   };

-   GLint mvpRef[4];

-

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

-      mvpRef[i] = _mesa_add_state_reference(vprog->Base.Parameters,

-                                            mvpState[i]);

-   }

-

-   /* Alloc storage for new instructions */

-   newInst = _mesa_alloc_instructions(newLen);

-   if (!newInst) {

-      _mesa_error(ctx, GL_OUT_OF_MEMORY,

-                  "glProgramString(inserting position_invariant code)");

-      return;

-   }

-

-   /*

-    * Generated instructions:

-    * newInst[0] = DP4 result.position.x, mvp.row[0], vertex.position;

-    * newInst[1] = DP4 result.position.y, mvp.row[1], vertex.position;

-    * newInst[2] = DP4 result.position.z, mvp.row[2], vertex.position;

-    * newInst[3] = DP4 result.position.w, mvp.row[3], vertex.position;

-    */

-   _mesa_init_instructions(newInst, 4);

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

-      newInst[i].Opcode = OPCODE_DP4;

-      newInst[i].DstReg.File = PROGRAM_OUTPUT;

-      newInst[i].DstReg.Index = VERT_RESULT_HPOS;

-      newInst[i].DstReg.WriteMask = (WRITEMASK_X << i);

-      newInst[i].SrcReg[0].File = PROGRAM_STATE_VAR;

-      newInst[i].SrcReg[0].Index = mvpRef[i];

-      newInst[i].SrcReg[0].Swizzle = SWIZZLE_NOOP;

-      newInst[i].SrcReg[1].File = PROGRAM_INPUT;

-      newInst[i].SrcReg[1].Index = VERT_ATTRIB_POS;

-      newInst[i].SrcReg[1].Swizzle = SWIZZLE_NOOP;

-   }

-

-   /* Append original instructions after new instructions */

-   _mesa_copy_instructions (newInst + 4, vprog->Base.Instructions, origLen);

-

-   /* free old instructions */

-   _mesa_free_instructions(vprog->Base.Instructions, origLen);

-

-   /* install new instructions */

-   vprog->Base.Instructions = newInst;

-   vprog->Base.NumInstructions = newLen;

-   vprog->Base.InputsRead |= VERT_BIT_POS;

-   vprog->Base.OutputsWritten |= BITFIELD64_BIT(VERT_RESULT_HPOS);

-}

-

-

-static void

-_mesa_insert_mvp_mad_code(struct gl_context *ctx, struct gl_vertex_program *vprog)

-{

-   struct prog_instruction *newInst;

-   const GLuint origLen = vprog->Base.NumInstructions;

-   const GLuint newLen = origLen + 4;

-   GLuint hposTemp;

-   GLuint i;

-

-   /*

-    * Setup state references for the modelview/projection matrix.

-    * XXX we should check if these state vars are already declared.

-    */

-   static const gl_state_index mvpState[4][STATE_LENGTH] = {

-      { STATE_MVP_MATRIX, 0, 0, 0, STATE_MATRIX_TRANSPOSE },

-      { STATE_MVP_MATRIX, 0, 1, 1, STATE_MATRIX_TRANSPOSE },

-      { STATE_MVP_MATRIX, 0, 2, 2, STATE_MATRIX_TRANSPOSE },

-      { STATE_MVP_MATRIX, 0, 3, 3, STATE_MATRIX_TRANSPOSE },

-   };

-   GLint mvpRef[4];

-

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

-      mvpRef[i] = _mesa_add_state_reference(vprog->Base.Parameters,

-                                            mvpState[i]);

-   }

-

-   /* Alloc storage for new instructions */

-   newInst = _mesa_alloc_instructions(newLen);

-   if (!newInst) {

-      _mesa_error(ctx, GL_OUT_OF_MEMORY,

-                  "glProgramString(inserting position_invariant code)");

-      return;

-   }

-

-   /* TEMP hposTemp; */

-   hposTemp = vprog->Base.NumTemporaries++;

-

-   /*

-    * Generated instructions:

-    *    emit_op2(p, OPCODE_MUL, tmp, 0, swizzle1(src,X), mat[0]);

-    *    emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Y), mat[1], tmp);

-    *    emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Z), mat[2], tmp);

-    *    emit_op3(p, OPCODE_MAD, dest, 0, swizzle1(src,W), mat[3], tmp);

-    */

-   _mesa_init_instructions(newInst, 4);

-

-   newInst[0].Opcode = OPCODE_MUL;

-   newInst[0].DstReg.File = PROGRAM_TEMPORARY;

-   newInst[0].DstReg.Index = hposTemp;

-   newInst[0].DstReg.WriteMask = WRITEMASK_XYZW;

-   newInst[0].SrcReg[0].File = PROGRAM_INPUT;

-   newInst[0].SrcReg[0].Index = VERT_ATTRIB_POS;

-   newInst[0].SrcReg[0].Swizzle = SWIZZLE_XXXX;

-   newInst[0].SrcReg[1].File = PROGRAM_STATE_VAR;

-   newInst[0].SrcReg[1].Index = mvpRef[0];

-   newInst[0].SrcReg[1].Swizzle = SWIZZLE_NOOP;

-

-   for (i = 1; i <= 2; i++) {

-      newInst[i].Opcode = OPCODE_MAD;

-      newInst[i].DstReg.File = PROGRAM_TEMPORARY;

-      newInst[i].DstReg.Index = hposTemp;

-      newInst[i].DstReg.WriteMask = WRITEMASK_XYZW;

-      newInst[i].SrcReg[0].File = PROGRAM_INPUT;

-      newInst[i].SrcReg[0].Index = VERT_ATTRIB_POS;

-      newInst[i].SrcReg[0].Swizzle = MAKE_SWIZZLE4(i,i,i,i);

-      newInst[i].SrcReg[1].File = PROGRAM_STATE_VAR;

-      newInst[i].SrcReg[1].Index = mvpRef[i];

-      newInst[i].SrcReg[1].Swizzle = SWIZZLE_NOOP;

-      newInst[i].SrcReg[2].File = PROGRAM_TEMPORARY;

-      newInst[i].SrcReg[2].Index = hposTemp;

-      newInst[1].SrcReg[2].Swizzle = SWIZZLE_NOOP;

-   }

-

-   newInst[3].Opcode = OPCODE_MAD;

-   newInst[3].DstReg.File = PROGRAM_OUTPUT;

-   newInst[3].DstReg.Index = VERT_RESULT_HPOS;

-   newInst[3].DstReg.WriteMask = WRITEMASK_XYZW;

-   newInst[3].SrcReg[0].File = PROGRAM_INPUT;

-   newInst[3].SrcReg[0].Index = VERT_ATTRIB_POS;

-   newInst[3].SrcReg[0].Swizzle = SWIZZLE_WWWW;

-   newInst[3].SrcReg[1].File = PROGRAM_STATE_VAR;

-   newInst[3].SrcReg[1].Index = mvpRef[3];

-   newInst[3].SrcReg[1].Swizzle = SWIZZLE_NOOP;

-   newInst[3].SrcReg[2].File = PROGRAM_TEMPORARY;

-   newInst[3].SrcReg[2].Index = hposTemp;

-   newInst[3].SrcReg[2].Swizzle = SWIZZLE_NOOP;

-

-

-   /* Append original instructions after new instructions */

-   _mesa_copy_instructions (newInst + 4, vprog->Base.Instructions, origLen);

-

-   /* free old instructions */

-   _mesa_free_instructions(vprog->Base.Instructions, origLen);

-

-   /* install new instructions */

-   vprog->Base.Instructions = newInst;

-   vprog->Base.NumInstructions = newLen;

-   vprog->Base.InputsRead |= VERT_BIT_POS;

-   vprog->Base.OutputsWritten |= BITFIELD64_BIT(VERT_RESULT_HPOS);

-}

-

-

-void

-_mesa_insert_mvp_code(struct gl_context *ctx, struct gl_vertex_program *vprog)

-{

-   if (ctx->mvp_with_dp4) 

-      _mesa_insert_mvp_dp4_code( ctx, vprog );

-   else

-      _mesa_insert_mvp_mad_code( ctx, vprog );

-}

-      

-

-

-

-

-

-/**

- * Append extra instructions onto the given fragment program to implement

- * the fog mode specified by fprog->FogOption.

- * The fragment.fogcoord input is used to compute the fog blend factor.

- *

- * XXX with a little work, this function could be adapted to add fog code

- * to vertex programs too.

- */

-void

-_mesa_append_fog_code(struct gl_context *ctx, struct gl_fragment_program *fprog)

-{

-   static const gl_state_index fogPStateOpt[STATE_LENGTH]

-      = { STATE_INTERNAL, STATE_FOG_PARAMS_OPTIMIZED, 0, 0, 0 };

-   static const gl_state_index fogColorState[STATE_LENGTH]

-      = { STATE_FOG_COLOR, 0, 0, 0, 0};

-   struct prog_instruction *newInst, *inst;

-   const GLuint origLen = fprog->Base.NumInstructions;

-   const GLuint newLen = origLen + 5;

-   GLuint i;

-   GLint fogPRefOpt, fogColorRef; /* state references */

-   GLuint colorTemp, fogFactorTemp; /* temporary registerss */

-

-   if (fprog->FogOption == GL_NONE) {

-      _mesa_problem(ctx, "_mesa_append_fog_code() called for fragment program"

-                    " with FogOption == GL_NONE");

-      return;

-   }

-

-   /* Alloc storage for new instructions */

-   newInst = _mesa_alloc_instructions(newLen);

-   if (!newInst) {

-      _mesa_error(ctx, GL_OUT_OF_MEMORY,

-                  "glProgramString(inserting fog_option code)");

-      return;

-   }

-

-   /* Copy orig instructions into new instruction buffer */

-   _mesa_copy_instructions(newInst, fprog->Base.Instructions, origLen);

-

-   /* PARAM fogParamsRefOpt = internal optimized fog params; */

-   fogPRefOpt

-      = _mesa_add_state_reference(fprog->Base.Parameters, fogPStateOpt);

-   /* PARAM fogColorRef = state.fog.color; */

-   fogColorRef

-      = _mesa_add_state_reference(fprog->Base.Parameters, fogColorState);

-

-   /* TEMP colorTemp; */

-   colorTemp = fprog->Base.NumTemporaries++;

-   /* TEMP fogFactorTemp; */

-   fogFactorTemp = fprog->Base.NumTemporaries++;

-

-   /* Scan program to find where result.color is written */

-   inst = newInst;

-   for (i = 0; i < fprog->Base.NumInstructions; i++) {

-      if (inst->Opcode == OPCODE_END)

-         break;

-      if (inst->DstReg.File == PROGRAM_OUTPUT &&

-          inst->DstReg.Index == FRAG_RESULT_COLOR) {

-         /* change the instruction to write to colorTemp w/ clamping */

-         inst->DstReg.File = PROGRAM_TEMPORARY;

-         inst->DstReg.Index = colorTemp;

-         inst->SaturateMode = SATURATE_ZERO_ONE;

-         /* don't break (may be several writes to result.color) */

-      }

-      inst++;

-   }

-   assert(inst->Opcode == OPCODE_END); /* we'll overwrite this inst */

-

-   _mesa_init_instructions(inst, 5);

-

-   /* emit instructions to compute fog blending factor */

-   if (fprog->FogOption == GL_LINEAR) {

-      /* MAD fogFactorTemp.x, fragment.fogcoord.x, fogPRefOpt.x, fogPRefOpt.y; */

-      inst->Opcode = OPCODE_MAD;

-      inst->DstReg.File = PROGRAM_TEMPORARY;

-      inst->DstReg.Index = fogFactorTemp;

-      inst->DstReg.WriteMask = WRITEMASK_X;

-      inst->SrcReg[0].File = PROGRAM_INPUT;

-      inst->SrcReg[0].Index = FRAG_ATTRIB_FOGC;

-      inst->SrcReg[0].Swizzle = SWIZZLE_XXXX;

-      inst->SrcReg[1].File = PROGRAM_STATE_VAR;

-      inst->SrcReg[1].Index = fogPRefOpt;

-      inst->SrcReg[1].Swizzle = SWIZZLE_XXXX;

-      inst->SrcReg[2].File = PROGRAM_STATE_VAR;

-      inst->SrcReg[2].Index = fogPRefOpt;

-      inst->SrcReg[2].Swizzle = SWIZZLE_YYYY;

-      inst->SaturateMode = SATURATE_ZERO_ONE;

-      inst++;

-   }

-   else {

-      ASSERT(fprog->FogOption == GL_EXP || fprog->FogOption == GL_EXP2);

-      /* fogPRefOpt.z = d/ln(2), fogPRefOpt.w = d/sqrt(ln(2) */

-      /* EXP: MUL fogFactorTemp.x, fogPRefOpt.z, fragment.fogcoord.x; */

-      /* EXP2: MUL fogFactorTemp.x, fogPRefOpt.w, fragment.fogcoord.x; */

-      inst->Opcode = OPCODE_MUL;

-      inst->DstReg.File = PROGRAM_TEMPORARY;

-      inst->DstReg.Index = fogFactorTemp;

-      inst->DstReg.WriteMask = WRITEMASK_X;

-      inst->SrcReg[0].File = PROGRAM_STATE_VAR;

-      inst->SrcReg[0].Index = fogPRefOpt;

-      inst->SrcReg[0].Swizzle

-         = (fprog->FogOption == GL_EXP) ? SWIZZLE_ZZZZ : SWIZZLE_WWWW;

-      inst->SrcReg[1].File = PROGRAM_INPUT;

-      inst->SrcReg[1].Index = FRAG_ATTRIB_FOGC;

-      inst->SrcReg[1].Swizzle = SWIZZLE_XXXX;

-      inst++;

-      if (fprog->FogOption == GL_EXP2) {

-         /* MUL fogFactorTemp.x, fogFactorTemp.x, fogFactorTemp.x; */

-         inst->Opcode = OPCODE_MUL;

-         inst->DstReg.File = PROGRAM_TEMPORARY;

-         inst->DstReg.Index = fogFactorTemp;

-         inst->DstReg.WriteMask = WRITEMASK_X;

-         inst->SrcReg[0].File = PROGRAM_TEMPORARY;

-         inst->SrcReg[0].Index = fogFactorTemp;

-         inst->SrcReg[0].Swizzle = SWIZZLE_XXXX;

-         inst->SrcReg[1].File = PROGRAM_TEMPORARY;

-         inst->SrcReg[1].Index = fogFactorTemp;

-         inst->SrcReg[1].Swizzle = SWIZZLE_XXXX;

-         inst++;

-      }

-      /* EX2_SAT fogFactorTemp.x, -fogFactorTemp.x; */

-      inst->Opcode = OPCODE_EX2;

-      inst->DstReg.File = PROGRAM_TEMPORARY;

-      inst->DstReg.Index = fogFactorTemp;

-      inst->DstReg.WriteMask = WRITEMASK_X;

-      inst->SrcReg[0].File = PROGRAM_TEMPORARY;

-      inst->SrcReg[0].Index = fogFactorTemp;

-      inst->SrcReg[0].Negate = NEGATE_XYZW;

-      inst->SrcReg[0].Swizzle = SWIZZLE_XXXX;

-      inst->SaturateMode = SATURATE_ZERO_ONE;

-      inst++;

-   }

-   /* LRP result.color.xyz, fogFactorTemp.xxxx, colorTemp, fogColorRef; */

-   inst->Opcode = OPCODE_LRP;

-   inst->DstReg.File = PROGRAM_OUTPUT;

-   inst->DstReg.Index = FRAG_RESULT_COLOR;

-   inst->DstReg.WriteMask = WRITEMASK_XYZ;

-   inst->SrcReg[0].File = PROGRAM_TEMPORARY;

-   inst->SrcReg[0].Index = fogFactorTemp;

-   inst->SrcReg[0].Swizzle = SWIZZLE_XXXX;

-   inst->SrcReg[1].File = PROGRAM_TEMPORARY;

-   inst->SrcReg[1].Index = colorTemp;

-   inst->SrcReg[1].Swizzle = SWIZZLE_NOOP;

-   inst->SrcReg[2].File = PROGRAM_STATE_VAR;

-   inst->SrcReg[2].Index = fogColorRef;

-   inst->SrcReg[2].Swizzle = SWIZZLE_NOOP;

-   inst++;

-   /* MOV result.color.w, colorTemp.x;  # copy alpha */

-   inst->Opcode = OPCODE_MOV;

-   inst->DstReg.File = PROGRAM_OUTPUT;

-   inst->DstReg.Index = FRAG_RESULT_COLOR;

-   inst->DstReg.WriteMask = WRITEMASK_W;

-   inst->SrcReg[0].File = PROGRAM_TEMPORARY;

-   inst->SrcReg[0].Index = colorTemp;

-   inst->SrcReg[0].Swizzle = SWIZZLE_NOOP;

-   inst++;

-   /* END; */

-   inst->Opcode = OPCODE_END;

-   inst++;

-

-   /* free old instructions */

-   _mesa_free_instructions(fprog->Base.Instructions, origLen);

-

-   /* install new instructions */

-   fprog->Base.Instructions = newInst;

-   fprog->Base.NumInstructions = inst - newInst;

-   fprog->Base.InputsRead |= FRAG_BIT_FOGC;

-   /* XXX do this?  fprog->FogOption = GL_NONE; */

-}

-

-

-

-static GLboolean

-is_texture_instruction(const struct prog_instruction *inst)

-{

-   switch (inst->Opcode) {

-   case OPCODE_TEX:

-   case OPCODE_TXB:

-   case OPCODE_TXD:

-   case OPCODE_TXL:

-   case OPCODE_TXP:

-   case OPCODE_TXP_NV:

-      return GL_TRUE;

-   default:

-      return GL_FALSE;

-   }

-}

-      

-

-/**

- * Count the number of texure indirections in the given program.

- * The program's NumTexIndirections field will be updated.

- * See the GL_ARB_fragment_program spec (issue 24) for details.

- * XXX we count texture indirections in texenvprogram.c (maybe use this code

- * instead and elsewhere).

- */

-void

-_mesa_count_texture_indirections(struct gl_program *prog)

-{

-   GLuint indirections = 1;

-   GLbitfield tempsOutput = 0x0;

-   GLbitfield aluTemps = 0x0;

-   GLuint i;

-

-   for (i = 0; i < prog->NumInstructions; i++) {

-      const struct prog_instruction *inst = prog->Instructions + i;

-

-      if (is_texture_instruction(inst)) {

-         if (((inst->SrcReg[0].File == PROGRAM_TEMPORARY) && 

-              (tempsOutput & (1 << inst->SrcReg[0].Index))) ||

-             ((inst->Opcode != OPCODE_KIL) &&

-              (inst->DstReg.File == PROGRAM_TEMPORARY) && 

-              (aluTemps & (1 << inst->DstReg.Index)))) 

-            {

-               indirections++;

-               tempsOutput = 0x0;

-               aluTemps = 0x0;

-            }

-      }

-      else {

-         GLuint j;

-         for (j = 0; j < 3; j++) {

-            if (inst->SrcReg[j].File == PROGRAM_TEMPORARY)

-               aluTemps |= (1 << inst->SrcReg[j].Index);

-         }

-         if (inst->DstReg.File == PROGRAM_TEMPORARY)

-            aluTemps |= (1 << inst->DstReg.Index);

-      }

-

-      if ((inst->Opcode != OPCODE_KIL) && (inst->DstReg.File == PROGRAM_TEMPORARY))

-         tempsOutput |= (1 << inst->DstReg.Index);

-   }

-

-   prog->NumTexIndirections = indirections;

-}

-

-

-/**

- * Count number of texture instructions in given program and update the

- * program's NumTexInstructions field.

- */

-void

-_mesa_count_texture_instructions(struct gl_program *prog)

-{

-   GLuint i;

-   prog->NumTexInstructions = 0;

-   for (i = 0; i < prog->NumInstructions; i++) {

-      prog->NumTexInstructions += is_texture_instruction(prog->Instructions + i);

-   }

-}

-

-

-/**

- * Scan/rewrite program to remove reads of custom (output) registers.

- * The passed type has to be either PROGRAM_OUTPUT or PROGRAM_VARYING

- * (for vertex shaders).

- * In GLSL shaders, varying vars can be read and written.

- * On some hardware, trying to read an output register causes trouble.

- * So, rewrite the program to use a temporary register in this case.

- */

-void

-_mesa_remove_output_reads(struct gl_program *prog, gl_register_file type)

-{

-   GLuint i;

-   GLint outputMap[VERT_RESULT_MAX];

-   GLuint numVaryingReads = 0;

-   GLboolean usedTemps[MAX_PROGRAM_TEMPS];

-   GLuint firstTemp = 0;

-

-   _mesa_find_used_registers(prog, PROGRAM_TEMPORARY,

-                             usedTemps, MAX_PROGRAM_TEMPS);

-

-   assert(type == PROGRAM_VARYING || type == PROGRAM_OUTPUT);

-   assert(prog->Target == GL_VERTEX_PROGRAM_ARB || type != PROGRAM_VARYING);

-

-   for (i = 0; i < VERT_RESULT_MAX; i++)

-      outputMap[i] = -1;

-

-   /* look for instructions which read from varying vars */

-   for (i = 0; i < prog->NumInstructions; i++) {

-      struct prog_instruction *inst = prog->Instructions + i;

-      const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode);

-      GLuint j;

-      for (j = 0; j < numSrc; j++) {

-         if (inst->SrcReg[j].File == type) {

-            /* replace the read with a temp reg */

-            const GLuint var = inst->SrcReg[j].Index;

-            if (outputMap[var] == -1) {

-               numVaryingReads++;

-               outputMap[var] = _mesa_find_free_register(usedTemps,

-                                                         MAX_PROGRAM_TEMPS,

-                                                         firstTemp);

-               firstTemp = outputMap[var] + 1;

-            }

-            inst->SrcReg[j].File = PROGRAM_TEMPORARY;

-            inst->SrcReg[j].Index = outputMap[var];

-         }

-      }

-   }

-

-   if (numVaryingReads == 0)

-      return; /* nothing to be done */

-

-   /* look for instructions which write to the varying vars identified above */

-   for (i = 0; i < prog->NumInstructions; i++) {

-      struct prog_instruction *inst = prog->Instructions + i;

-      if (inst->DstReg.File == type &&

-          outputMap[inst->DstReg.Index] >= 0) {

-         /* change inst to write to the temp reg, instead of the varying */

-         inst->DstReg.File = PROGRAM_TEMPORARY;

-         inst->DstReg.Index = outputMap[inst->DstReg.Index];

-      }

-   }

-

-   /* insert new instructions to copy the temp vars to the varying vars */

-   {

-      struct prog_instruction *inst;

-      GLint endPos, var;

-

-      /* Look for END instruction and insert the new varying writes */

-      endPos = -1;

-      for (i = 0; i < prog->NumInstructions; i++) {

-         struct prog_instruction *inst = prog->Instructions + i;

-         if (inst->Opcode == OPCODE_END) {

-            endPos = i;

-            _mesa_insert_instructions(prog, i, numVaryingReads);

-            break;

-         }

-      }

-

-      assert(endPos >= 0);

-

-      /* insert new MOV instructions here */

-      inst = prog->Instructions + endPos;

-      for (var = 0; var < VERT_RESULT_MAX; var++) {

-         if (outputMap[var] >= 0) {

-            /* MOV VAR[var], TEMP[tmp]; */

-            inst->Opcode = OPCODE_MOV;

-            inst->DstReg.File = type;

-            inst->DstReg.Index = var;

-            inst->SrcReg[0].File = PROGRAM_TEMPORARY;

-            inst->SrcReg[0].Index = outputMap[var];

-            inst++;

-         }

-      }

-   }

-}

-

-

-/**

- * Make the given fragment program into a "no-op" shader.

- * Actually, just copy the incoming fragment color (or texcoord)

- * to the output color.

- * This is for debug/test purposes.

- */

-void

-_mesa_nop_fragment_program(struct gl_context *ctx, struct gl_fragment_program *prog)

-{

-   struct prog_instruction *inst;

-   GLuint inputAttr;

-

-   inst = _mesa_alloc_instructions(2);

-   if (!inst) {

-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "_mesa_nop_fragment_program");

-      return;

-   }

-

-   _mesa_init_instructions(inst, 2);

-

-   inst[0].Opcode = OPCODE_MOV;

-   inst[0].DstReg.File = PROGRAM_OUTPUT;

-   inst[0].DstReg.Index = FRAG_RESULT_COLOR;

-   inst[0].SrcReg[0].File = PROGRAM_INPUT;

-   if (prog->Base.InputsRead & FRAG_BIT_COL0)

-      inputAttr = FRAG_ATTRIB_COL0;

-   else

-      inputAttr = FRAG_ATTRIB_TEX0;

-   inst[0].SrcReg[0].Index = inputAttr;

-

-   inst[1].Opcode = OPCODE_END;

-

-   _mesa_free_instructions(prog->Base.Instructions,

-                           prog->Base.NumInstructions);

-

-   prog->Base.Instructions = inst;

-   prog->Base.NumInstructions = 2;

-   prog->Base.InputsRead = 1 << inputAttr;

-   prog->Base.OutputsWritten = BITFIELD64_BIT(FRAG_RESULT_COLOR);

-}

-

-

-/**

- * \sa _mesa_nop_fragment_program

- * Replace the given vertex program with a "no-op" program that just

- * transforms vertex position and emits color.

- */

-void

-_mesa_nop_vertex_program(struct gl_context *ctx, struct gl_vertex_program *prog)

-{

-   struct prog_instruction *inst;

-   GLuint inputAttr;

-

-   /*

-    * Start with a simple vertex program that emits color.

-    */

-   inst = _mesa_alloc_instructions(2);

-   if (!inst) {

-      _mesa_error(ctx, GL_OUT_OF_MEMORY, "_mesa_nop_vertex_program");

-      return;

-   }

-

-   _mesa_init_instructions(inst, 2);

-

-   inst[0].Opcode = OPCODE_MOV;

-   inst[0].DstReg.File = PROGRAM_OUTPUT;

-   inst[0].DstReg.Index = VERT_RESULT_COL0;

-   inst[0].SrcReg[0].File = PROGRAM_INPUT;

-   if (prog->Base.InputsRead & VERT_BIT_COLOR0)

-      inputAttr = VERT_ATTRIB_COLOR0;

-   else

-      inputAttr = VERT_ATTRIB_TEX0;

-   inst[0].SrcReg[0].Index = inputAttr;

-

-   inst[1].Opcode = OPCODE_END;

-

-   _mesa_free_instructions(prog->Base.Instructions,

-                           prog->Base.NumInstructions);

-

-   prog->Base.Instructions = inst;

-   prog->Base.NumInstructions = 2;

-   prog->Base.InputsRead = 1 << inputAttr;

-   prog->Base.OutputsWritten = BITFIELD64_BIT(VERT_RESULT_COL0);

-

-   /*

-    * Now insert code to do standard modelview/projection transformation.

-    */

-   _mesa_insert_mvp_code(ctx, prog);

-}

+/*
+ * Mesa 3-D graphics library
+ * Version:  6.5.3
+ *
+ * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
+ *
+ * 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 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
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file  programopt.c 
+ * Vertex/Fragment program optimizations and transformations for program
+ * options, etc.
+ *
+ * \author Brian Paul
+ */
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "prog_parameter.h"
+#include "prog_statevars.h"
+#include "program.h"
+#include "programopt.h"
+#include "prog_instruction.h"
+
+
+/**
+ * This function inserts instructions for coordinate modelview * projection
+ * into a vertex program.
+ * May be used to implement the position_invariant option.
+ */
+static void
+_mesa_insert_mvp_dp4_code(struct gl_context *ctx, struct gl_vertex_program *vprog)
+{
+   struct prog_instruction *newInst;
+   const GLuint origLen = vprog->Base.NumInstructions;
+   const GLuint newLen = origLen + 4;
+   GLuint i;
+
+   /*
+    * Setup state references for the modelview/projection matrix.
+    * XXX we should check if these state vars are already declared.
+    */
+   static const gl_state_index mvpState[4][STATE_LENGTH] = {
+      { STATE_MVP_MATRIX, 0, 0, 0, 0 },  /* state.matrix.mvp.row[0] */
+      { STATE_MVP_MATRIX, 0, 1, 1, 0 },  /* state.matrix.mvp.row[1] */
+      { STATE_MVP_MATRIX, 0, 2, 2, 0 },  /* state.matrix.mvp.row[2] */
+      { STATE_MVP_MATRIX, 0, 3, 3, 0 },  /* state.matrix.mvp.row[3] */
+   };
+   GLint mvpRef[4];
+
+   for (i = 0; i < 4; i++) {
+      mvpRef[i] = _mesa_add_state_reference(vprog->Base.Parameters,
+                                            mvpState[i]);
+   }
+
+   /* Alloc storage for new instructions */
+   newInst = _mesa_alloc_instructions(newLen);
+   if (!newInst) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY,
+                  "glProgramString(inserting position_invariant code)");
+      return;
+   }
+
+   /*
+    * Generated instructions:
+    * newInst[0] = DP4 result.position.x, mvp.row[0], vertex.position;
+    * newInst[1] = DP4 result.position.y, mvp.row[1], vertex.position;
+    * newInst[2] = DP4 result.position.z, mvp.row[2], vertex.position;
+    * newInst[3] = DP4 result.position.w, mvp.row[3], vertex.position;
+    */
+   _mesa_init_instructions(newInst, 4);
+   for (i = 0; i < 4; i++) {
+      newInst[i].Opcode = OPCODE_DP4;
+      newInst[i].DstReg.File = PROGRAM_OUTPUT;
+      newInst[i].DstReg.Index = VERT_RESULT_HPOS;
+      newInst[i].DstReg.WriteMask = (WRITEMASK_X << i);
+      newInst[i].SrcReg[0].File = PROGRAM_STATE_VAR;
+      newInst[i].SrcReg[0].Index = mvpRef[i];
+      newInst[i].SrcReg[0].Swizzle = SWIZZLE_NOOP;
+      newInst[i].SrcReg[1].File = PROGRAM_INPUT;
+      newInst[i].SrcReg[1].Index = VERT_ATTRIB_POS;
+      newInst[i].SrcReg[1].Swizzle = SWIZZLE_NOOP;
+   }
+
+   /* Append original instructions after new instructions */
+   _mesa_copy_instructions (newInst + 4, vprog->Base.Instructions, origLen);
+
+   /* free old instructions */
+   _mesa_free_instructions(vprog->Base.Instructions, origLen);
+
+   /* install new instructions */
+   vprog->Base.Instructions = newInst;
+   vprog->Base.NumInstructions = newLen;
+   vprog->Base.InputsRead |= VERT_BIT_POS;
+   vprog->Base.OutputsWritten |= BITFIELD64_BIT(VERT_RESULT_HPOS);
+}
+
+
+static void
+_mesa_insert_mvp_mad_code(struct gl_context *ctx, struct gl_vertex_program *vprog)
+{
+   struct prog_instruction *newInst;
+   const GLuint origLen = vprog->Base.NumInstructions;
+   const GLuint newLen = origLen + 4;
+   GLuint hposTemp;
+   GLuint i;
+
+   /*
+    * Setup state references for the modelview/projection matrix.
+    * XXX we should check if these state vars are already declared.
+    */
+   static const gl_state_index mvpState[4][STATE_LENGTH] = {
+      { STATE_MVP_MATRIX, 0, 0, 0, STATE_MATRIX_TRANSPOSE },
+      { STATE_MVP_MATRIX, 0, 1, 1, STATE_MATRIX_TRANSPOSE },
+      { STATE_MVP_MATRIX, 0, 2, 2, STATE_MATRIX_TRANSPOSE },
+      { STATE_MVP_MATRIX, 0, 3, 3, STATE_MATRIX_TRANSPOSE },
+   };
+   GLint mvpRef[4];
+
+   for (i = 0; i < 4; i++) {
+      mvpRef[i] = _mesa_add_state_reference(vprog->Base.Parameters,
+                                            mvpState[i]);
+   }
+
+   /* Alloc storage for new instructions */
+   newInst = _mesa_alloc_instructions(newLen);
+   if (!newInst) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY,
+                  "glProgramString(inserting position_invariant code)");
+      return;
+   }
+
+   /* TEMP hposTemp; */
+   hposTemp = vprog->Base.NumTemporaries++;
+
+   /*
+    * Generated instructions:
+    *    emit_op2(p, OPCODE_MUL, tmp, 0, swizzle1(src,X), mat[0]);
+    *    emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Y), mat[1], tmp);
+    *    emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Z), mat[2], tmp);
+    *    emit_op3(p, OPCODE_MAD, dest, 0, swizzle1(src,W), mat[3], tmp);
+    */
+   _mesa_init_instructions(newInst, 4);
+
+   newInst[0].Opcode = OPCODE_MUL;
+   newInst[0].DstReg.File = PROGRAM_TEMPORARY;
+   newInst[0].DstReg.Index = hposTemp;
+   newInst[0].DstReg.WriteMask = WRITEMASK_XYZW;
+   newInst[0].SrcReg[0].File = PROGRAM_INPUT;
+   newInst[0].SrcReg[0].Index = VERT_ATTRIB_POS;
+   newInst[0].SrcReg[0].Swizzle = SWIZZLE_XXXX;
+   newInst[0].SrcReg[1].File = PROGRAM_STATE_VAR;
+   newInst[0].SrcReg[1].Index = mvpRef[0];
+   newInst[0].SrcReg[1].Swizzle = SWIZZLE_NOOP;
+
+   for (i = 1; i <= 2; i++) {
+      newInst[i].Opcode = OPCODE_MAD;
+      newInst[i].DstReg.File = PROGRAM_TEMPORARY;
+      newInst[i].DstReg.Index = hposTemp;
+      newInst[i].DstReg.WriteMask = WRITEMASK_XYZW;
+      newInst[i].SrcReg[0].File = PROGRAM_INPUT;
+      newInst[i].SrcReg[0].Index = VERT_ATTRIB_POS;
+      newInst[i].SrcReg[0].Swizzle = MAKE_SWIZZLE4(i,i,i,i);
+      newInst[i].SrcReg[1].File = PROGRAM_STATE_VAR;
+      newInst[i].SrcReg[1].Index = mvpRef[i];
+      newInst[i].SrcReg[1].Swizzle = SWIZZLE_NOOP;
+      newInst[i].SrcReg[2].File = PROGRAM_TEMPORARY;
+      newInst[i].SrcReg[2].Index = hposTemp;
+      newInst[1].SrcReg[2].Swizzle = SWIZZLE_NOOP;
+   }
+
+   newInst[3].Opcode = OPCODE_MAD;
+   newInst[3].DstReg.File = PROGRAM_OUTPUT;
+   newInst[3].DstReg.Index = VERT_RESULT_HPOS;
+   newInst[3].DstReg.WriteMask = WRITEMASK_XYZW;
+   newInst[3].SrcReg[0].File = PROGRAM_INPUT;
+   newInst[3].SrcReg[0].Index = VERT_ATTRIB_POS;
+   newInst[3].SrcReg[0].Swizzle = SWIZZLE_WWWW;
+   newInst[3].SrcReg[1].File = PROGRAM_STATE_VAR;
+   newInst[3].SrcReg[1].Index = mvpRef[3];
+   newInst[3].SrcReg[1].Swizzle = SWIZZLE_NOOP;
+   newInst[3].SrcReg[2].File = PROGRAM_TEMPORARY;
+   newInst[3].SrcReg[2].Index = hposTemp;
+   newInst[3].SrcReg[2].Swizzle = SWIZZLE_NOOP;
+
+
+   /* Append original instructions after new instructions */
+   _mesa_copy_instructions (newInst + 4, vprog->Base.Instructions, origLen);
+
+   /* free old instructions */
+   _mesa_free_instructions(vprog->Base.Instructions, origLen);
+
+   /* install new instructions */
+   vprog->Base.Instructions = newInst;
+   vprog->Base.NumInstructions = newLen;
+   vprog->Base.InputsRead |= VERT_BIT_POS;
+   vprog->Base.OutputsWritten |= BITFIELD64_BIT(VERT_RESULT_HPOS);
+}
+
+
+void
+_mesa_insert_mvp_code(struct gl_context *ctx, struct gl_vertex_program *vprog)
+{
+   if (ctx->mvp_with_dp4) 
+      _mesa_insert_mvp_dp4_code( ctx, vprog );
+   else
+      _mesa_insert_mvp_mad_code( ctx, vprog );
+}
+      
+
+
+
+
+
+/**
+ * Append extra instructions onto the given fragment program to implement
+ * the fog mode specified by fprog->FogOption.
+ * The fragment.fogcoord input is used to compute the fog blend factor.
+ *
+ * XXX with a little work, this function could be adapted to add fog code
+ * to vertex programs too.
+ */
+void
+_mesa_append_fog_code(struct gl_context *ctx, struct gl_fragment_program *fprog, GLboolean saturate)
+{
+   static const gl_state_index fogPStateOpt[STATE_LENGTH]
+      = { STATE_INTERNAL, STATE_FOG_PARAMS_OPTIMIZED, 0, 0, 0 };
+   static const gl_state_index fogColorState[STATE_LENGTH]
+      = { STATE_FOG_COLOR, 0, 0, 0, 0};
+   struct prog_instruction *newInst, *inst;
+   const GLuint origLen = fprog->Base.NumInstructions;
+   const GLuint newLen = origLen + 5;
+   GLuint i;
+   GLint fogPRefOpt, fogColorRef; /* state references */
+   GLuint colorTemp, fogFactorTemp; /* temporary registerss */
+
+   if (fprog->FogOption == GL_NONE) {
+      _mesa_problem(ctx, "_mesa_append_fog_code() called for fragment program"
+                    " with FogOption == GL_NONE");
+      return;
+   }
+
+   /* Alloc storage for new instructions */
+   newInst = _mesa_alloc_instructions(newLen);
+   if (!newInst) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY,
+                  "glProgramString(inserting fog_option code)");
+      return;
+   }
+
+   /* Copy orig instructions into new instruction buffer */
+   _mesa_copy_instructions(newInst, fprog->Base.Instructions, origLen);
+
+   /* PARAM fogParamsRefOpt = internal optimized fog params; */
+   fogPRefOpt
+      = _mesa_add_state_reference(fprog->Base.Parameters, fogPStateOpt);
+   /* PARAM fogColorRef = state.fog.color; */
+   fogColorRef
+      = _mesa_add_state_reference(fprog->Base.Parameters, fogColorState);
+
+   /* TEMP colorTemp; */
+   colorTemp = fprog->Base.NumTemporaries++;
+   /* TEMP fogFactorTemp; */
+   fogFactorTemp = fprog->Base.NumTemporaries++;
+
+   /* Scan program to find where result.color is written */
+   inst = newInst;
+   for (i = 0; i < fprog->Base.NumInstructions; i++) {
+      if (inst->Opcode == OPCODE_END)
+         break;
+      if (inst->DstReg.File == PROGRAM_OUTPUT &&
+          inst->DstReg.Index == FRAG_RESULT_COLOR) {
+         /* change the instruction to write to colorTemp w/ clamping */
+         inst->DstReg.File = PROGRAM_TEMPORARY;
+         inst->DstReg.Index = colorTemp;
+         inst->SaturateMode = saturate;
+         /* don't break (may be several writes to result.color) */
+      }
+      inst++;
+   }
+   assert(inst->Opcode == OPCODE_END); /* we'll overwrite this inst */
+
+   _mesa_init_instructions(inst, 5);
+
+   /* emit instructions to compute fog blending factor */
+   /* this is always clamped to [0, 1] regardless of fragment clamping */
+   if (fprog->FogOption == GL_LINEAR) {
+      /* MAD fogFactorTemp.x, fragment.fogcoord.x, fogPRefOpt.x, fogPRefOpt.y; */
+      inst->Opcode = OPCODE_MAD;
+      inst->DstReg.File = PROGRAM_TEMPORARY;
+      inst->DstReg.Index = fogFactorTemp;
+      inst->DstReg.WriteMask = WRITEMASK_X;
+      inst->SrcReg[0].File = PROGRAM_INPUT;
+      inst->SrcReg[0].Index = FRAG_ATTRIB_FOGC;
+      inst->SrcReg[0].Swizzle = SWIZZLE_XXXX;
+      inst->SrcReg[1].File = PROGRAM_STATE_VAR;
+      inst->SrcReg[1].Index = fogPRefOpt;
+      inst->SrcReg[1].Swizzle = SWIZZLE_XXXX;
+      inst->SrcReg[2].File = PROGRAM_STATE_VAR;
+      inst->SrcReg[2].Index = fogPRefOpt;
+      inst->SrcReg[2].Swizzle = SWIZZLE_YYYY;
+      inst->SaturateMode = SATURATE_ZERO_ONE;
+      inst++;
+   }
+   else {
+      ASSERT(fprog->FogOption == GL_EXP || fprog->FogOption == GL_EXP2);
+      /* fogPRefOpt.z = d/ln(2), fogPRefOpt.w = d/sqrt(ln(2) */
+      /* EXP: MUL fogFactorTemp.x, fogPRefOpt.z, fragment.fogcoord.x; */
+      /* EXP2: MUL fogFactorTemp.x, fogPRefOpt.w, fragment.fogcoord.x; */
+      inst->Opcode = OPCODE_MUL;
+      inst->DstReg.File = PROGRAM_TEMPORARY;
+      inst->DstReg.Index = fogFactorTemp;
+      inst->DstReg.WriteMask = WRITEMASK_X;
+      inst->SrcReg[0].File = PROGRAM_STATE_VAR;
+      inst->SrcReg[0].Index = fogPRefOpt;
+      inst->SrcReg[0].Swizzle
+         = (fprog->FogOption == GL_EXP) ? SWIZZLE_ZZZZ : SWIZZLE_WWWW;
+      inst->SrcReg[1].File = PROGRAM_INPUT;
+      inst->SrcReg[1].Index = FRAG_ATTRIB_FOGC;
+      inst->SrcReg[1].Swizzle = SWIZZLE_XXXX;
+      inst++;
+      if (fprog->FogOption == GL_EXP2) {
+         /* MUL fogFactorTemp.x, fogFactorTemp.x, fogFactorTemp.x; */
+         inst->Opcode = OPCODE_MUL;
+         inst->DstReg.File = PROGRAM_TEMPORARY;
+         inst->DstReg.Index = fogFactorTemp;
+         inst->DstReg.WriteMask = WRITEMASK_X;
+         inst->SrcReg[0].File = PROGRAM_TEMPORARY;
+         inst->SrcReg[0].Index = fogFactorTemp;
+         inst->SrcReg[0].Swizzle = SWIZZLE_XXXX;
+         inst->SrcReg[1].File = PROGRAM_TEMPORARY;
+         inst->SrcReg[1].Index = fogFactorTemp;
+         inst->SrcReg[1].Swizzle = SWIZZLE_XXXX;
+         inst++;
+      }
+      /* EX2_SAT fogFactorTemp.x, -fogFactorTemp.x; */
+      inst->Opcode = OPCODE_EX2;
+      inst->DstReg.File = PROGRAM_TEMPORARY;
+      inst->DstReg.Index = fogFactorTemp;
+      inst->DstReg.WriteMask = WRITEMASK_X;
+      inst->SrcReg[0].File = PROGRAM_TEMPORARY;
+      inst->SrcReg[0].Index = fogFactorTemp;
+      inst->SrcReg[0].Negate = NEGATE_XYZW;
+      inst->SrcReg[0].Swizzle = SWIZZLE_XXXX;
+      inst->SaturateMode = SATURATE_ZERO_ONE;
+      inst++;
+   }
+   /* LRP result.color.xyz, fogFactorTemp.xxxx, colorTemp, fogColorRef; */
+   inst->Opcode = OPCODE_LRP;
+   inst->DstReg.File = PROGRAM_OUTPUT;
+   inst->DstReg.Index = FRAG_RESULT_COLOR;
+   inst->DstReg.WriteMask = WRITEMASK_XYZ;
+   inst->SrcReg[0].File = PROGRAM_TEMPORARY;
+   inst->SrcReg[0].Index = fogFactorTemp;
+   inst->SrcReg[0].Swizzle = SWIZZLE_XXXX;
+   inst->SrcReg[1].File = PROGRAM_TEMPORARY;
+   inst->SrcReg[1].Index = colorTemp;
+   inst->SrcReg[1].Swizzle = SWIZZLE_NOOP;
+   inst->SrcReg[2].File = PROGRAM_STATE_VAR;
+   inst->SrcReg[2].Index = fogColorRef;
+   inst->SrcReg[2].Swizzle = SWIZZLE_NOOP;
+   inst++;
+   /* MOV result.color.w, colorTemp.x;  # copy alpha */
+   inst->Opcode = OPCODE_MOV;
+   inst->DstReg.File = PROGRAM_OUTPUT;
+   inst->DstReg.Index = FRAG_RESULT_COLOR;
+   inst->DstReg.WriteMask = WRITEMASK_W;
+   inst->SrcReg[0].File = PROGRAM_TEMPORARY;
+   inst->SrcReg[0].Index = colorTemp;
+   inst->SrcReg[0].Swizzle = SWIZZLE_NOOP;
+   inst++;
+   /* END; */
+   inst->Opcode = OPCODE_END;
+   inst++;
+
+   /* free old instructions */
+   _mesa_free_instructions(fprog->Base.Instructions, origLen);
+
+   /* install new instructions */
+   fprog->Base.Instructions = newInst;
+   fprog->Base.NumInstructions = inst - newInst;
+   fprog->Base.InputsRead |= FRAG_BIT_FOGC;
+   /* XXX do this?  fprog->FogOption = GL_NONE; */
+}
+
+
+
+static GLboolean
+is_texture_instruction(const struct prog_instruction *inst)
+{
+   switch (inst->Opcode) {
+   case OPCODE_TEX:
+   case OPCODE_TXB:
+   case OPCODE_TXD:
+   case OPCODE_TXL:
+   case OPCODE_TXP:
+   case OPCODE_TXP_NV:
+      return GL_TRUE;
+   default:
+      return GL_FALSE;
+   }
+}
+      
+
+/**
+ * Count the number of texure indirections in the given program.
+ * The program's NumTexIndirections field will be updated.
+ * See the GL_ARB_fragment_program spec (issue 24) for details.
+ * XXX we count texture indirections in texenvprogram.c (maybe use this code
+ * instead and elsewhere).
+ */
+void
+_mesa_count_texture_indirections(struct gl_program *prog)
+{
+   GLuint indirections = 1;
+   GLbitfield tempsOutput = 0x0;
+   GLbitfield aluTemps = 0x0;
+   GLuint i;
+
+   for (i = 0; i < prog->NumInstructions; i++) {
+      const struct prog_instruction *inst = prog->Instructions + i;
+
+      if (is_texture_instruction(inst)) {
+         if (((inst->SrcReg[0].File == PROGRAM_TEMPORARY) && 
+              (tempsOutput & (1 << inst->SrcReg[0].Index))) ||
+             ((inst->Opcode != OPCODE_KIL) &&
+              (inst->DstReg.File == PROGRAM_TEMPORARY) && 
+              (aluTemps & (1 << inst->DstReg.Index)))) 
+            {
+               indirections++;
+               tempsOutput = 0x0;
+               aluTemps = 0x0;
+            }
+      }
+      else {
+         GLuint j;
+         for (j = 0; j < 3; j++) {
+            if (inst->SrcReg[j].File == PROGRAM_TEMPORARY)
+               aluTemps |= (1 << inst->SrcReg[j].Index);
+         }
+         if (inst->DstReg.File == PROGRAM_TEMPORARY)
+            aluTemps |= (1 << inst->DstReg.Index);
+      }
+
+      if ((inst->Opcode != OPCODE_KIL) && (inst->DstReg.File == PROGRAM_TEMPORARY))
+         tempsOutput |= (1 << inst->DstReg.Index);
+   }
+
+   prog->NumTexIndirections = indirections;
+}
+
+
+/**
+ * Count number of texture instructions in given program and update the
+ * program's NumTexInstructions field.
+ */
+void
+_mesa_count_texture_instructions(struct gl_program *prog)
+{
+   GLuint i;
+   prog->NumTexInstructions = 0;
+   for (i = 0; i < prog->NumInstructions; i++) {
+      prog->NumTexInstructions += is_texture_instruction(prog->Instructions + i);
+   }
+}
+
+
+/**
+ * Scan/rewrite program to remove reads of custom (output) registers.
+ * The passed type has to be either PROGRAM_OUTPUT or PROGRAM_VARYING
+ * (for vertex shaders).
+ * In GLSL shaders, varying vars can be read and written.
+ * On some hardware, trying to read an output register causes trouble.
+ * So, rewrite the program to use a temporary register in this case.
+ */
+void
+_mesa_remove_output_reads(struct gl_program *prog, gl_register_file type)
+{
+   GLuint i;
+   GLint outputMap[VERT_RESULT_MAX];
+   GLuint numVaryingReads = 0;
+   GLboolean usedTemps[MAX_PROGRAM_TEMPS];
+   GLuint firstTemp = 0;
+
+   _mesa_find_used_registers(prog, PROGRAM_TEMPORARY,
+                             usedTemps, MAX_PROGRAM_TEMPS);
+
+   assert(type == PROGRAM_VARYING || type == PROGRAM_OUTPUT);
+   assert(prog->Target == GL_VERTEX_PROGRAM_ARB || type != PROGRAM_VARYING);
+
+   for (i = 0; i < VERT_RESULT_MAX; i++)
+      outputMap[i] = -1;
+
+   /* look for instructions which read from varying vars */
+   for (i = 0; i < prog->NumInstructions; i++) {
+      struct prog_instruction *inst = prog->Instructions + i;
+      const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode);
+      GLuint j;
+      for (j = 0; j < numSrc; j++) {
+         if (inst->SrcReg[j].File == type) {
+            /* replace the read with a temp reg */
+            const GLuint var = inst->SrcReg[j].Index;
+            if (outputMap[var] == -1) {
+               numVaryingReads++;
+               outputMap[var] = _mesa_find_free_register(usedTemps,
+                                                         MAX_PROGRAM_TEMPS,
+                                                         firstTemp);
+               firstTemp = outputMap[var] + 1;
+            }
+            inst->SrcReg[j].File = PROGRAM_TEMPORARY;
+            inst->SrcReg[j].Index = outputMap[var];
+         }
+      }
+   }
+
+   if (numVaryingReads == 0)
+      return; /* nothing to be done */
+
+   /* look for instructions which write to the varying vars identified above */
+   for (i = 0; i < prog->NumInstructions; i++) {
+      struct prog_instruction *inst = prog->Instructions + i;
+      if (inst->DstReg.File == type &&
+          outputMap[inst->DstReg.Index] >= 0) {
+         /* change inst to write to the temp reg, instead of the varying */
+         inst->DstReg.File = PROGRAM_TEMPORARY;
+         inst->DstReg.Index = outputMap[inst->DstReg.Index];
+      }
+   }
+
+   /* insert new instructions to copy the temp vars to the varying vars */
+   {
+      struct prog_instruction *inst;
+      GLint endPos, var;
+
+      /* Look for END instruction and insert the new varying writes */
+      endPos = -1;
+      for (i = 0; i < prog->NumInstructions; i++) {
+         struct prog_instruction *inst = prog->Instructions + i;
+         if (inst->Opcode == OPCODE_END) {
+            endPos = i;
+            _mesa_insert_instructions(prog, i, numVaryingReads);
+            break;
+         }
+      }
+
+      assert(endPos >= 0);
+
+      /* insert new MOV instructions here */
+      inst = prog->Instructions + endPos;
+      for (var = 0; var < VERT_RESULT_MAX; var++) {
+         if (outputMap[var] >= 0) {
+            /* MOV VAR[var], TEMP[tmp]; */
+            inst->Opcode = OPCODE_MOV;
+            inst->DstReg.File = type;
+            inst->DstReg.Index = var;
+            inst->SrcReg[0].File = PROGRAM_TEMPORARY;
+            inst->SrcReg[0].Index = outputMap[var];
+            inst++;
+         }
+      }
+   }
+}
+
+
+/**
+ * Make the given fragment program into a "no-op" shader.
+ * Actually, just copy the incoming fragment color (or texcoord)
+ * to the output color.
+ * This is for debug/test purposes.
+ */
+void
+_mesa_nop_fragment_program(struct gl_context *ctx, struct gl_fragment_program *prog)
+{
+   struct prog_instruction *inst;
+   GLuint inputAttr;
+
+   inst = _mesa_alloc_instructions(2);
+   if (!inst) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "_mesa_nop_fragment_program");
+      return;
+   }
+
+   _mesa_init_instructions(inst, 2);
+
+   inst[0].Opcode = OPCODE_MOV;
+   inst[0].DstReg.File = PROGRAM_OUTPUT;
+   inst[0].DstReg.Index = FRAG_RESULT_COLOR;
+   inst[0].SrcReg[0].File = PROGRAM_INPUT;
+   if (prog->Base.InputsRead & FRAG_BIT_COL0)
+      inputAttr = FRAG_ATTRIB_COL0;
+   else
+      inputAttr = FRAG_ATTRIB_TEX0;
+   inst[0].SrcReg[0].Index = inputAttr;
+
+   inst[1].Opcode = OPCODE_END;
+
+   _mesa_free_instructions(prog->Base.Instructions,
+                           prog->Base.NumInstructions);
+
+   prog->Base.Instructions = inst;
+   prog->Base.NumInstructions = 2;
+   prog->Base.InputsRead = 1 << inputAttr;
+   prog->Base.OutputsWritten = BITFIELD64_BIT(FRAG_RESULT_COLOR);
+}
+
+
+/**
+ * \sa _mesa_nop_fragment_program
+ * Replace the given vertex program with a "no-op" program that just
+ * transforms vertex position and emits color.
+ */
+void
+_mesa_nop_vertex_program(struct gl_context *ctx, struct gl_vertex_program *prog)
+{
+   struct prog_instruction *inst;
+   GLuint inputAttr;
+
+   /*
+    * Start with a simple vertex program that emits color.
+    */
+   inst = _mesa_alloc_instructions(2);
+   if (!inst) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "_mesa_nop_vertex_program");
+      return;
+   }
+
+   _mesa_init_instructions(inst, 2);
+
+   inst[0].Opcode = OPCODE_MOV;
+   inst[0].DstReg.File = PROGRAM_OUTPUT;
+   inst[0].DstReg.Index = VERT_RESULT_COL0;
+   inst[0].SrcReg[0].File = PROGRAM_INPUT;
+   if (prog->Base.InputsRead & VERT_BIT_COLOR0)
+      inputAttr = VERT_ATTRIB_COLOR0;
+   else
+      inputAttr = VERT_ATTRIB_TEX0;
+   inst[0].SrcReg[0].Index = inputAttr;
+
+   inst[1].Opcode = OPCODE_END;
+
+   _mesa_free_instructions(prog->Base.Instructions,
+                           prog->Base.NumInstructions);
+
+   prog->Base.Instructions = inst;
+   prog->Base.NumInstructions = 2;
+   prog->Base.InputsRead = 1 << inputAttr;
+   prog->Base.OutputsWritten = BITFIELD64_BIT(VERT_RESULT_COL0);
+
+   /*
+    * Now insert code to do standard modelview/projection transformation.
+    */
+   _mesa_insert_mvp_code(ctx, prog);
+}
diff --git a/mesalib/src/mesa/program/programopt.h b/mesalib/src/mesa/program/programopt.h
index 2e07d8989..79631aa58 100644
--- a/mesalib/src/mesa/program/programopt.h
+++ b/mesalib/src/mesa/program/programopt.h
@@ -1,53 +1,53 @@
-/*

- * Mesa 3-D graphics library

- * Version:  6.5.3

- *

- * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.

- *

- * 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 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

- * BRIAN PAUL 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.

- */

-

-

-#ifndef PROGRAMOPT_H

-#define PROGRAMOPT_H 1

-

-#include "main/mtypes.h"

-

-extern void

-_mesa_insert_mvp_code(struct gl_context *ctx, struct gl_vertex_program *vprog);

-

-extern void

-_mesa_append_fog_code(struct gl_context *ctx, struct gl_fragment_program *fprog);

-

-extern void

-_mesa_count_texture_indirections(struct gl_program *prog);

-

-extern void

-_mesa_count_texture_instructions(struct gl_program *prog);

-

-extern void

-_mesa_remove_output_reads(struct gl_program *prog, gl_register_file type);

-

-extern void

-_mesa_nop_fragment_program(struct gl_context *ctx, struct gl_fragment_program *prog);

-

-extern void

-_mesa_nop_vertex_program(struct gl_context *ctx, struct gl_vertex_program *prog);

-

-

-#endif /* PROGRAMOPT_H */

+/*
+ * Mesa 3-D graphics library
+ * Version:  6.5.3
+ *
+ * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
+ *
+ * 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 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
+ * BRIAN PAUL 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.
+ */
+
+
+#ifndef PROGRAMOPT_H
+#define PROGRAMOPT_H 1
+
+#include "main/mtypes.h"
+
+extern void
+_mesa_insert_mvp_code(struct gl_context *ctx, struct gl_vertex_program *vprog);
+
+extern void
+_mesa_append_fog_code(struct gl_context *ctx, struct gl_fragment_program *fprog, GLboolean saturate);
+
+extern void
+_mesa_count_texture_indirections(struct gl_program *prog);
+
+extern void
+_mesa_count_texture_instructions(struct gl_program *prog);
+
+extern void
+_mesa_remove_output_reads(struct gl_program *prog, gl_register_file type);
+
+extern void
+_mesa_nop_fragment_program(struct gl_context *ctx, struct gl_fragment_program *prog);
+
+extern void
+_mesa_nop_vertex_program(struct gl_context *ctx, struct gl_vertex_program *prog);
+
+
+#endif /* PROGRAMOPT_H */