src/gallium/auxiliary/tgsi/tgsi_scan.c - platform/external/mesa3d - Git at Google

 /**************************************************************************
  *
  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
  * All Rights Reserved.
  * Copyright 2008 VMware, Inc.  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, sub license, 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 NON-INFRINGEMENT.
  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
  *
  **************************************************************************/

 /**
  * TGSI program scan utility.
  * Used to determine which registers and instructions are used by a shader.
  *
  * Authors:  Brian Paul
  */


 #include "util/u_math.h"
 #include "tgsi/tgsi_parse.h"
 #include "tgsi/tgsi_util.h"
 #include "tgsi/tgsi_scan.h"


 /**
  * Scan the given TGSI shader to collect information such as number of
  * registers used, special instructions used, etc.
  * \return info  the result of the scan
  */
 void
 tgsi_scan_shader(const struct tgsi_token *tokens,
                  struct tgsi_shader_info *info)
 {
    uint procType, i;
    struct tgsi_parse_context parse;

    memset(info, 0, sizeof(*info));
    for (i = 0; i < TGSI_FILE_COUNT; i++)
       info->file_max[i] = -1;

    /**
     ** Setup to begin parsing input shader
     **/
    if (tgsi_parse_init( &parse, tokens ) != TGSI_PARSE_OK) {
       debug_printf("tgsi_parse_init() failed in tgsi_scan_shader()!\n");
       return;
    }
    procType = parse.FullHeader.Processor.Processor;
    assert(procType == TGSI_PROCESSOR_FRAGMENT ||
           procType == TGSI_PROCESSOR_VERTEX ||
           procType == TGSI_PROCESSOR_GEOMETRY ||
           procType == TGSI_PROCESSOR_COMPUTE);


    /**
     ** Loop over incoming program tokens/instructions
     */
    while( !tgsi_parse_end_of_tokens( &parse ) ) {

       info->num_tokens++;

       tgsi_parse_token( &parse );

       switch( parse.FullToken.Token.Type ) {
       case TGSI_TOKEN_TYPE_INSTRUCTION:
          {
             const struct tgsi_full_instruction *fullinst
                = &parse.FullToken.FullInstruction;
             uint i;

             assert(fullinst->Instruction.Opcode < TGSI_OPCODE_LAST);
             info->opcode_count[fullinst->Instruction.Opcode]++;

             for (i = 0; i < fullinst->Instruction.NumSrcRegs; i++) {
                const struct tgsi_full_src_register *src =
                   &fullinst->Src[i];
                int ind = src->Register.Index;

                /* Mark which inputs are effectively used */
                if (src->Register.File == TGSI_FILE_INPUT) {
                   unsigned usage_mask;
                   usage_mask = tgsi_util_get_inst_usage_mask(fullinst, i);
                   if (src->Register.Indirect) {
                      for (ind = 0; ind < info->num_inputs; ++ind) {
                         info->input_usage_mask[ind] |= usage_mask;
                      }
                   } else {
                      assert(ind >= 0);
                      assert(ind < PIPE_MAX_SHADER_INPUTS);
                      info->input_usage_mask[ind] |= usage_mask;
                   }

                   if (procType == TGSI_PROCESSOR_FRAGMENT &&
                       src->Register.File == TGSI_FILE_INPUT &&
                       info->reads_position &&
                       src->Register.Index == 0 &&
                       (src->Register.SwizzleX == TGSI_SWIZZLE_Z ||
                        src->Register.SwizzleY == TGSI_SWIZZLE_Z ||
                        src->Register.SwizzleZ == TGSI_SWIZZLE_Z ||
                        src->Register.SwizzleW == TGSI_SWIZZLE_Z)) {
                      info->reads_z = TRUE;
                   }
                }

                /* check for indirect register reads */
                if (src->Register.Indirect) {
                   info->indirect_files |= (1 << src->Register.File);
                }
             }

             /* check for indirect register writes */
             for (i = 0; i < fullinst->Instruction.NumDstRegs; i++) {
                const struct tgsi_full_dst_register *dst = &fullinst->Dst[i];
                if (dst->Register.Indirect) {
                   info->indirect_files |= (1 << dst->Register.File);
                }
             }

             info->num_instructions++;
          }
          break;

       case TGSI_TOKEN_TYPE_DECLARATION:
          {
             const struct tgsi_full_declaration *fulldecl
                = &parse.FullToken.FullDeclaration;
             const uint file = fulldecl->Declaration.File;
             uint reg;
             for (reg = fulldecl->Range.First;
                  reg <= fulldecl->Range.Last;
                  reg++) {

                /* only first 32 regs will appear in this bitfield */
                info->file_mask[file] |= (1 << reg);
                info->file_count[file]++;
                info->file_max[file] = MAX2(info->file_max[file], (int)reg);

                if (file == TGSI_FILE_INPUT) {
                   info->input_semantic_name[reg] = (ubyte)fulldecl->Semantic.Name;
                   info->input_semantic_index[reg] = (ubyte)fulldecl->Semantic.Index;
                   info->input_interpolate[reg] = (ubyte)fulldecl->Interp.Interpolate;
                   info->input_centroid[reg] = (ubyte)fulldecl->Interp.Centroid;
                   info->input_cylindrical_wrap[reg] = (ubyte)fulldecl->Interp.CylindricalWrap;
                   info->num_inputs++;

                   if (procType == TGSI_PROCESSOR_FRAGMENT &&
                       fulldecl->Semantic.Name == TGSI_SEMANTIC_POSITION)
                         info->reads_position = TRUE;
                }
                else if (file == TGSI_FILE_SYSTEM_VALUE) {
                   unsigned index = fulldecl->Range.First;
                   unsigned semName = fulldecl->Semantic.Name;

                   info->system_value_semantic_name[index] = semName;
                   info->num_system_values = MAX2(info->num_system_values,
                                                  index + 1);

                   /*
                   info->system_value_semantic_name[info->num_system_values++] =
                      fulldecl->Semantic.Name;
                   */

                   if (fulldecl->Semantic.Name == TGSI_SEMANTIC_INSTANCEID) {
                      info->uses_instanceid = TRUE;
                   }
                   else if (fulldecl->Semantic.Name == TGSI_SEMANTIC_VERTEXID) {
                      info->uses_vertexid = TRUE;
                   }
                }
                else if (file == TGSI_FILE_OUTPUT) {
                   info->output_semantic_name[reg] = (ubyte)fulldecl->Semantic.Name;
                   info->output_semantic_index[reg] = (ubyte)fulldecl->Semantic.Index;
                   info->num_outputs++;

                   if (procType == TGSI_PROCESSOR_VERTEX &&
                       fulldecl->Semantic.Name == TGSI_SEMANTIC_CLIPDIST) {
                      info->num_written_clipdistance += util_bitcount(fulldecl->Declaration.UsageMask);
                   }
                   /* extra info for special outputs */
                   if (procType == TGSI_PROCESSOR_FRAGMENT &&
                       fulldecl->Semantic.Name == TGSI_SEMANTIC_POSITION)
                         info->writes_z = TRUE;
                   if (procType == TGSI_PROCESSOR_FRAGMENT &&
                       fulldecl->Semantic.Name == TGSI_SEMANTIC_STENCIL)
                         info->writes_stencil = TRUE;
                   if (procType == TGSI_PROCESSOR_VERTEX &&
                       fulldecl->Semantic.Name == TGSI_SEMANTIC_EDGEFLAG) {
                      info->writes_edgeflag = TRUE;
                   }
                }

              }
          }
          break;

       case TGSI_TOKEN_TYPE_IMMEDIATE:
          {
             uint reg = info->immediate_count++;
             uint file = TGSI_FILE_IMMEDIATE;

             info->file_mask[file] |= (1 << reg);
             info->file_count[file]++;
             info->file_max[file] = MAX2(info->file_max[file], (int)reg);
          }
          break;

       case TGSI_TOKEN_TYPE_PROPERTY:
          {
             const struct tgsi_full_property *fullprop
                = &parse.FullToken.FullProperty;

             info->properties[info->num_properties].name =
                fullprop->Property.PropertyName;
             memcpy(info->properties[info->num_properties].data,
                    fullprop->u, 8 * sizeof(unsigned));;

             ++info->num_properties;
          }
          break;

       default:
          assert( 0 );
       }
    }

    info->uses_kill = (info->opcode_count[TGSI_OPCODE_KIL] ||
                       info->opcode_count[TGSI_OPCODE_KILP]);

    /* extract simple properties */
    for (i = 0; i < info->num_properties; ++i) {
       switch (info->properties[i].name) {
       case TGSI_PROPERTY_FS_COORD_ORIGIN:
          info->origin_lower_left = info->properties[i].data[0];
          break;
       case TGSI_PROPERTY_FS_COORD_PIXEL_CENTER:
          info->pixel_center_integer = info->properties[i].data[0];
          break;
       case TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS:
          info->color0_writes_all_cbufs = info->properties[i].data[0];
          break;
       default:
          ;
       }
    }

    tgsi_parse_free (&parse);
 }


 /**
  * Check if the given shader is a "passthrough" shader consisting of only
  * MOV instructions of the form:  MOV OUT[n], IN[n]
  *
  */
 boolean
 tgsi_is_passthrough_shader(const struct tgsi_token *tokens)
 {
    struct tgsi_parse_context parse;

    /**
     ** Setup to begin parsing input shader
     **/
    if (tgsi_parse_init(&parse, tokens) != TGSI_PARSE_OK) {
       debug_printf("tgsi_parse_init() failed in tgsi_is_passthrough_shader()!\n");
       return FALSE;
    }

    /**
     ** Loop over incoming program tokens/instructions
     */
    while (!tgsi_parse_end_of_tokens(&parse)) {

       tgsi_parse_token(&parse);

       switch (parse.FullToken.Token.Type) {
       case TGSI_TOKEN_TYPE_INSTRUCTION:
          {
             struct tgsi_full_instruction *fullinst =
                &parse.FullToken.FullInstruction;
             const struct tgsi_full_src_register *src =
                &fullinst->Src[0];
             const struct tgsi_full_dst_register *dst =
                &fullinst->Dst[0];

             /* Do a whole bunch of checks for a simple move */
             if (fullinst->Instruction.Opcode != TGSI_OPCODE_MOV ||
                 (src->Register.File != TGSI_FILE_INPUT &&
                  src->Register.File != TGSI_FILE_SYSTEM_VALUE) ||
                 dst->Register.File != TGSI_FILE_OUTPUT ||
                 src->Register.Index != dst->Register.Index ||

                 src->Register.Negate ||
                 src->Register.Absolute ||

                 src->Register.SwizzleX != TGSI_SWIZZLE_X ||
                 src->Register.SwizzleY != TGSI_SWIZZLE_Y ||
                 src->Register.SwizzleZ != TGSI_SWIZZLE_Z ||
                 src->Register.SwizzleW != TGSI_SWIZZLE_W ||

                 dst->Register.WriteMask != TGSI_WRITEMASK_XYZW)
             {
                tgsi_parse_free(&parse);
                return FALSE;
             }
          }
          break;

       case TGSI_TOKEN_TYPE_DECLARATION:
          /* fall-through */
       case TGSI_TOKEN_TYPE_IMMEDIATE:
          /* fall-through */
       case TGSI_TOKEN_TYPE_PROPERTY:
          /* fall-through */
       default:
          ; /* no-op */
       }
    }

    tgsi_parse_free(&parse);

    /* if we get here, it's a pass-through shader */
    return TRUE;
 }
	/**************************************************************************
	*
	* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
	* All Rights Reserved.
	* Copyright 2008 VMware, Inc. 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, sub license, 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 NON-INFRINGEMENT.
	* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
	*
	**************************************************************************/

	/**
	* TGSI program scan utility.
	* Used to determine which registers and instructions are used by a shader.
	*
	* Authors: Brian Paul
	*/


	#include "util/u_math.h"
	#include "tgsi/tgsi_parse.h"
	#include "tgsi/tgsi_util.h"
	#include "tgsi/tgsi_scan.h"




	/**
	* Scan the given TGSI shader to collect information such as number of
	* registers used, special instructions used, etc.
	* \return info the result of the scan
	*/
	void
	tgsi_scan_shader(const struct tgsi_token *tokens,
	struct tgsi_shader_info *info)
	{
	uint procType, i;
	struct tgsi_parse_context parse;

	memset(info, 0, sizeof(*info));
	for (i = 0; i < TGSI_FILE_COUNT; i++)
	info->file_max[i] = -1;

	/**
	** Setup to begin parsing input shader
	**/
	if (tgsi_parse_init( &parse, tokens ) != TGSI_PARSE_OK) {
	debug_printf("tgsi_parse_init() failed in tgsi_scan_shader()!\n");
	return;
	}
	procType = parse.FullHeader.Processor.Processor;
	assert(procType == TGSI_PROCESSOR_FRAGMENT \|\|
	procType == TGSI_PROCESSOR_VERTEX \|\|
	procType == TGSI_PROCESSOR_GEOMETRY \|\|
	procType == TGSI_PROCESSOR_COMPUTE);


	/**
	** Loop over incoming program tokens/instructions
	*/
	while( !tgsi_parse_end_of_tokens( &parse ) ) {

	info->num_tokens++;

	tgsi_parse_token( &parse );

	switch( parse.FullToken.Token.Type ) {
	case TGSI_TOKEN_TYPE_INSTRUCTION:
	{
	const struct tgsi_full_instruction *fullinst
	= &parse.FullToken.FullInstruction;
	uint i;

	assert(fullinst->Instruction.Opcode < TGSI_OPCODE_LAST);
	info->opcode_count[fullinst->Instruction.Opcode]++;

	for (i = 0; i < fullinst->Instruction.NumSrcRegs; i++) {
	const struct tgsi_full_src_register *src =
	&fullinst->Src[i];
	int ind = src->Register.Index;

	/* Mark which inputs are effectively used */
	if (src->Register.File == TGSI_FILE_INPUT) {
	unsigned usage_mask;
	usage_mask = tgsi_util_get_inst_usage_mask(fullinst, i);
	if (src->Register.Indirect) {
	for (ind = 0; ind < info->num_inputs; ++ind) {
	info->input_usage_mask[ind] \|= usage_mask;
	}
	} else {
	assert(ind >= 0);
	assert(ind < PIPE_MAX_SHADER_INPUTS);
	info->input_usage_mask[ind] \|= usage_mask;
	}

	if (procType == TGSI_PROCESSOR_FRAGMENT &&
	src->Register.File == TGSI_FILE_INPUT &&
	info->reads_position &&
	src->Register.Index == 0 &&
	(src->Register.SwizzleX == TGSI_SWIZZLE_Z \|\|
	src->Register.SwizzleY == TGSI_SWIZZLE_Z \|\|
	src->Register.SwizzleZ == TGSI_SWIZZLE_Z \|\|
	src->Register.SwizzleW == TGSI_SWIZZLE_Z)) {
	info->reads_z = TRUE;
	}
	}

	/* check for indirect register reads */
	if (src->Register.Indirect) {
	info->indirect_files \|= (1 << src->Register.File);
	}
	}

	/* check for indirect register writes */
	for (i = 0; i < fullinst->Instruction.NumDstRegs; i++) {
	const struct tgsi_full_dst_register *dst = &fullinst->Dst[i];
	if (dst->Register.Indirect) {
	info->indirect_files \|= (1 << dst->Register.File);
	}
	}

	info->num_instructions++;
	}
	break;

	case TGSI_TOKEN_TYPE_DECLARATION:
	{
	const struct tgsi_full_declaration *fulldecl
	= &parse.FullToken.FullDeclaration;
	const uint file = fulldecl->Declaration.File;
	uint reg;
	for (reg = fulldecl->Range.First;
	reg <= fulldecl->Range.Last;
	reg++) {

	/* only first 32 regs will appear in this bitfield */
	info->file_mask[file] \|= (1 << reg);
	info->file_count[file]++;
	info->file_max[file] = MAX2(info->file_max[file], (int)reg);

	if (file == TGSI_FILE_INPUT) {
	info->input_semantic_name[reg] = (ubyte)fulldecl->Semantic.Name;
	info->input_semantic_index[reg] = (ubyte)fulldecl->Semantic.Index;
	info->input_interpolate[reg] = (ubyte)fulldecl->Interp.Interpolate;
	info->input_centroid[reg] = (ubyte)fulldecl->Interp.Centroid;
	info->input_cylindrical_wrap[reg] = (ubyte)fulldecl->Interp.CylindricalWrap;
	info->num_inputs++;

	if (procType == TGSI_PROCESSOR_FRAGMENT &&
	fulldecl->Semantic.Name == TGSI_SEMANTIC_POSITION)
	info->reads_position = TRUE;
	}
	else if (file == TGSI_FILE_SYSTEM_VALUE) {
	unsigned index = fulldecl->Range.First;
	unsigned semName = fulldecl->Semantic.Name;

	info->system_value_semantic_name[index] = semName;
	info->num_system_values = MAX2(info->num_system_values,
	index + 1);

	/*
	info->system_value_semantic_name[info->num_system_values++] =
	fulldecl->Semantic.Name;
	*/

	if (fulldecl->Semantic.Name == TGSI_SEMANTIC_INSTANCEID) {
	info->uses_instanceid = TRUE;
	}
	else if (fulldecl->Semantic.Name == TGSI_SEMANTIC_VERTEXID) {
	info->uses_vertexid = TRUE;
	}
	}
	else if (file == TGSI_FILE_OUTPUT) {
	info->output_semantic_name[reg] = (ubyte)fulldecl->Semantic.Name;
	info->output_semantic_index[reg] = (ubyte)fulldecl->Semantic.Index;
	info->num_outputs++;

	if (procType == TGSI_PROCESSOR_VERTEX &&
	fulldecl->Semantic.Name == TGSI_SEMANTIC_CLIPDIST) {
	info->num_written_clipdistance += util_bitcount(fulldecl->Declaration.UsageMask);
	}
	/* extra info for special outputs */
	if (procType == TGSI_PROCESSOR_FRAGMENT &&
	fulldecl->Semantic.Name == TGSI_SEMANTIC_POSITION)
	info->writes_z = TRUE;
	if (procType == TGSI_PROCESSOR_FRAGMENT &&
	fulldecl->Semantic.Name == TGSI_SEMANTIC_STENCIL)
	info->writes_stencil = TRUE;
	if (procType == TGSI_PROCESSOR_VERTEX &&
	fulldecl->Semantic.Name == TGSI_SEMANTIC_EDGEFLAG) {
	info->writes_edgeflag = TRUE;
	}
	}

	}
	}
	break;

	case TGSI_TOKEN_TYPE_IMMEDIATE:
	{
	uint reg = info->immediate_count++;
	uint file = TGSI_FILE_IMMEDIATE;

	info->file_mask[file] \|= (1 << reg);
	info->file_count[file]++;
	info->file_max[file] = MAX2(info->file_max[file], (int)reg);
	}
	break;

	case TGSI_TOKEN_TYPE_PROPERTY:
	{
	const struct tgsi_full_property *fullprop
	= &parse.FullToken.FullProperty;

	info->properties[info->num_properties].name =
	fullprop->Property.PropertyName;
	memcpy(info->properties[info->num_properties].data,
	fullprop->u, 8 * sizeof(unsigned));;

	++info->num_properties;
	}
	break;

	default:
	assert( 0 );
	}
	}

	info->uses_kill = (info->opcode_count[TGSI_OPCODE_KIL] \|\|
	info->opcode_count[TGSI_OPCODE_KILP]);

	/* extract simple properties */
	for (i = 0; i < info->num_properties; ++i) {
	switch (info->properties[i].name) {
	case TGSI_PROPERTY_FS_COORD_ORIGIN:
	info->origin_lower_left = info->properties[i].data[0];
	break;
	case TGSI_PROPERTY_FS_COORD_PIXEL_CENTER:
	info->pixel_center_integer = info->properties[i].data[0];
	break;
	case TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS:
	info->color0_writes_all_cbufs = info->properties[i].data[0];
	break;
	default:
	;
	}
	}

	tgsi_parse_free (&parse);
	}



	/**
	* Check if the given shader is a "passthrough" shader consisting of only
	* MOV instructions of the form: MOV OUT[n], IN[n]
	*
	*/
	boolean
	tgsi_is_passthrough_shader(const struct tgsi_token *tokens)
	{
	struct tgsi_parse_context parse;

	/**
	** Setup to begin parsing input shader
	**/
	if (tgsi_parse_init(&parse, tokens) != TGSI_PARSE_OK) {
	debug_printf("tgsi_parse_init() failed in tgsi_is_passthrough_shader()!\n");
	return FALSE;
	}

	/**
	** Loop over incoming program tokens/instructions
	*/
	while (!tgsi_parse_end_of_tokens(&parse)) {

	tgsi_parse_token(&parse);

	switch (parse.FullToken.Token.Type) {
	case TGSI_TOKEN_TYPE_INSTRUCTION:
	{
	struct tgsi_full_instruction *fullinst =
	&parse.FullToken.FullInstruction;
	const struct tgsi_full_src_register *src =
	&fullinst->Src[0];
	const struct tgsi_full_dst_register *dst =
	&fullinst->Dst[0];

	/* Do a whole bunch of checks for a simple move */
	if (fullinst->Instruction.Opcode != TGSI_OPCODE_MOV \|\|
	(src->Register.File != TGSI_FILE_INPUT &&
	src->Register.File != TGSI_FILE_SYSTEM_VALUE) \|\|
	dst->Register.File != TGSI_FILE_OUTPUT \|\|
	src->Register.Index != dst->Register.Index \|\|

	src->Register.Negate \|\|
	src->Register.Absolute \|\|

	src->Register.SwizzleX != TGSI_SWIZZLE_X \|\|
	src->Register.SwizzleY != TGSI_SWIZZLE_Y \|\|
	src->Register.SwizzleZ != TGSI_SWIZZLE_Z \|\|
	src->Register.SwizzleW != TGSI_SWIZZLE_W \|\|

	dst->Register.WriteMask != TGSI_WRITEMASK_XYZW)
	{
	tgsi_parse_free(&parse);
	return FALSE;
	}
	}
	break;

	case TGSI_TOKEN_TYPE_DECLARATION:
	/* fall-through */
	case TGSI_TOKEN_TYPE_IMMEDIATE:
	/* fall-through */
	case TGSI_TOKEN_TYPE_PROPERTY:
	/* fall-through */
	default:
	; /* no-op */
	}
	}

	tgsi_parse_free(&parse);

	/* if we get here, it's a pass-through shader */
	return TRUE;
	}