2 * Copyright © 2008, 2009 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
28 #include "main/core.h" /* for struct gl_context */
29 #include "main/context.h"
30 #include "main/shaderobj.h"
31 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
32 #include "util/ralloc.h"
34 #include "glsl_parser_extras.h"
35 #include "glsl_parser.h"
36 #include "ir_optimization.h"
37 #include "loop_analysis.h"
40 * Format a short human-readable description of the given GLSL version.
43 glsl_compute_version_string(void *mem_ctx
, bool is_es
, unsigned version
)
45 return ralloc_asprintf(mem_ctx
, "GLSL%s %d.%02d", is_es
? " ES" : "",
46 version
/ 100, version
% 100);
50 static const unsigned known_desktop_glsl_versions
[] =
51 { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450 };
54 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context
*_ctx
,
55 gl_shader_stage stage
,
57 : ctx(_ctx
), cs_input_local_size_specified(false), cs_input_local_size(),
60 assert(stage
< MESA_SHADER_STAGES
);
64 this->translation_unit
.make_empty();
65 this->symbols
= new(mem_ctx
) glsl_symbol_table
;
67 this->info_log
= ralloc_strdup(mem_ctx
, "");
69 this->loop_nesting_ast
= NULL
;
71 this->struct_specifier_depth
= 0;
73 this->uses_builtin_functions
= false;
75 /* Set default language version and extensions */
76 this->language_version
= ctx
->Const
.ForceGLSLVersion
?
77 ctx
->Const
.ForceGLSLVersion
: 110;
78 this->es_shader
= false;
79 this->ARB_texture_rectangle_enable
= true;
81 /* OpenGL ES 2.0 has different defaults from desktop GL. */
82 if (ctx
->API
== API_OPENGLES2
) {
83 this->language_version
= 100;
84 this->es_shader
= true;
85 this->ARB_texture_rectangle_enable
= false;
88 this->extensions
= &ctx
->Extensions
;
90 this->Const
.MaxLights
= ctx
->Const
.MaxLights
;
91 this->Const
.MaxClipPlanes
= ctx
->Const
.MaxClipPlanes
;
92 this->Const
.MaxTextureUnits
= ctx
->Const
.MaxTextureUnits
;
93 this->Const
.MaxTextureCoords
= ctx
->Const
.MaxTextureCoordUnits
;
94 this->Const
.MaxVertexAttribs
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAttribs
;
95 this->Const
.MaxVertexUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxUniformComponents
;
96 this->Const
.MaxVertexTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
;
97 this->Const
.MaxCombinedTextureImageUnits
= ctx
->Const
.MaxCombinedTextureImageUnits
;
98 this->Const
.MaxTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
;
99 this->Const
.MaxFragmentUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxUniformComponents
;
100 this->Const
.MinProgramTexelOffset
= ctx
->Const
.MinProgramTexelOffset
;
101 this->Const
.MaxProgramTexelOffset
= ctx
->Const
.MaxProgramTexelOffset
;
103 this->Const
.MaxDrawBuffers
= ctx
->Const
.MaxDrawBuffers
;
106 this->Const
.MaxVertexOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxOutputComponents
;
107 this->Const
.MaxGeometryInputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxInputComponents
;
108 this->Const
.MaxGeometryOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxOutputComponents
;
109 this->Const
.MaxFragmentInputComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxInputComponents
;
110 this->Const
.MaxGeometryTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
;
111 this->Const
.MaxGeometryOutputVertices
= ctx
->Const
.MaxGeometryOutputVertices
;
112 this->Const
.MaxGeometryTotalOutputComponents
= ctx
->Const
.MaxGeometryTotalOutputComponents
;
113 this->Const
.MaxGeometryUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxUniformComponents
;
115 this->Const
.MaxVertexAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicCounters
;
116 this->Const
.MaxGeometryAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicCounters
;
117 this->Const
.MaxFragmentAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicCounters
;
118 this->Const
.MaxCombinedAtomicCounters
= ctx
->Const
.MaxCombinedAtomicCounters
;
119 this->Const
.MaxAtomicBufferBindings
= ctx
->Const
.MaxAtomicBufferBindings
;
121 /* Compute shader constants */
122 for (unsigned i
= 0; i
< Elements(this->Const
.MaxComputeWorkGroupCount
); i
++)
123 this->Const
.MaxComputeWorkGroupCount
[i
] = ctx
->Const
.MaxComputeWorkGroupCount
[i
];
124 for (unsigned i
= 0; i
< Elements(this->Const
.MaxComputeWorkGroupSize
); i
++)
125 this->Const
.MaxComputeWorkGroupSize
[i
] = ctx
->Const
.MaxComputeWorkGroupSize
[i
];
127 this->Const
.MaxImageUnits
= ctx
->Const
.MaxImageUnits
;
128 this->Const
.MaxCombinedImageUnitsAndFragmentOutputs
= ctx
->Const
.MaxCombinedImageUnitsAndFragmentOutputs
;
129 this->Const
.MaxImageSamples
= ctx
->Const
.MaxImageSamples
;
130 this->Const
.MaxVertexImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxImageUniforms
;
131 this->Const
.MaxGeometryImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxImageUniforms
;
132 this->Const
.MaxFragmentImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxImageUniforms
;
133 this->Const
.MaxCombinedImageUniforms
= ctx
->Const
.MaxCombinedImageUniforms
;
135 /* ARB_viewport_array */
136 this->Const
.MaxViewports
= ctx
->Const
.MaxViewports
;
138 this->current_function
= NULL
;
139 this->toplevel_ir
= NULL
;
140 this->found_return
= false;
141 this->all_invariant
= false;
142 this->user_structures
= NULL
;
143 this->num_user_structures
= 0;
145 /* supported_versions should be large enough to support the known desktop
146 * GLSL versions plus 2 GLES versions (ES2 & ES3)
148 STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions
) + 2) ==
149 ARRAY_SIZE(this->supported_versions
));
151 /* Populate the list of supported GLSL versions */
152 /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
153 * the OpenGL 3.2 Core context is supported, this logic will need
154 * change. Older versions of GLSL are no longer supported
155 * outside the compatibility contexts of 3.x.
157 this->num_supported_versions
= 0;
158 if (_mesa_is_desktop_gl(ctx
)) {
159 for (unsigned i
= 0; i
< ARRAY_SIZE(known_desktop_glsl_versions
); i
++) {
160 if (known_desktop_glsl_versions
[i
] <= ctx
->Const
.GLSLVersion
) {
161 this->supported_versions
[this->num_supported_versions
].ver
162 = known_desktop_glsl_versions
[i
];
163 this->supported_versions
[this->num_supported_versions
].es
= false;
164 this->num_supported_versions
++;
168 if (ctx
->API
== API_OPENGLES2
|| ctx
->Extensions
.ARB_ES2_compatibility
) {
169 this->supported_versions
[this->num_supported_versions
].ver
= 100;
170 this->supported_versions
[this->num_supported_versions
].es
= true;
171 this->num_supported_versions
++;
173 if (_mesa_is_gles3(ctx
) || ctx
->Extensions
.ARB_ES3_compatibility
) {
174 this->supported_versions
[this->num_supported_versions
].ver
= 300;
175 this->supported_versions
[this->num_supported_versions
].es
= true;
176 this->num_supported_versions
++;
179 /* Create a string for use in error messages to tell the user which GLSL
180 * versions are supported.
182 char *supported
= ralloc_strdup(this, "");
183 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
184 unsigned ver
= this->supported_versions
[i
].ver
;
185 const char *const prefix
= (i
== 0)
187 : ((i
== this->num_supported_versions
- 1) ? ", and " : ", ");
188 const char *const suffix
= (this->supported_versions
[i
].es
) ? " ES" : "";
190 ralloc_asprintf_append(& supported
, "%s%u.%02u%s",
192 ver
/ 100, ver
% 100,
196 this->supported_version_string
= supported
;
198 if (ctx
->Const
.ForceGLSLExtensionsWarn
)
199 _mesa_glsl_process_extension("all", NULL
, "warn", NULL
, this);
201 this->default_uniform_qualifier
= new(this) ast_type_qualifier();
202 this->default_uniform_qualifier
->flags
.q
.shared
= 1;
203 this->default_uniform_qualifier
->flags
.q
.column_major
= 1;
205 this->fs_uses_gl_fragcoord
= false;
206 this->fs_redeclares_gl_fragcoord
= false;
207 this->fs_origin_upper_left
= false;
208 this->fs_pixel_center_integer
= false;
209 this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers
= false;
211 this->gs_input_prim_type_specified
= false;
212 this->gs_input_size
= 0;
213 this->in_qualifier
= new(this) ast_type_qualifier();
214 this->out_qualifier
= new(this) ast_type_qualifier();
215 this->early_fragment_tests
= false;
216 memset(this->atomic_counter_offsets
, 0,
217 sizeof(this->atomic_counter_offsets
));
218 this->allow_extension_directive_midshader
=
219 ctx
->Const
.AllowGLSLExtensionDirectiveMidShader
;
223 * Determine whether the current GLSL version is sufficiently high to support
224 * a certain feature, and generate an error message if it isn't.
226 * \param required_glsl_version and \c required_glsl_es_version are
227 * interpreted as they are in _mesa_glsl_parse_state::is_version().
229 * \param locp is the parser location where the error should be reported.
231 * \param fmt (and additional arguments) constitute a printf-style error
232 * message to report if the version check fails. Information about the
233 * current and required GLSL versions will be appended. So, for example, if
234 * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
235 * "foo unsupported") is called, the error message will be "foo unsupported in
236 * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
239 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version
,
240 unsigned required_glsl_es_version
,
241 YYLTYPE
*locp
, const char *fmt
, ...)
243 if (this->is_version(required_glsl_version
, required_glsl_es_version
))
248 char *problem
= ralloc_vasprintf(this, fmt
, args
);
250 const char *glsl_version_string
251 = glsl_compute_version_string(this, false, required_glsl_version
);
252 const char *glsl_es_version_string
253 = glsl_compute_version_string(this, true, required_glsl_es_version
);
254 const char *requirement_string
= "";
255 if (required_glsl_version
&& required_glsl_es_version
) {
256 requirement_string
= ralloc_asprintf(this, " (%s or %s required)",
258 glsl_es_version_string
);
259 } else if (required_glsl_version
) {
260 requirement_string
= ralloc_asprintf(this, " (%s required)",
261 glsl_version_string
);
262 } else if (required_glsl_es_version
) {
263 requirement_string
= ralloc_asprintf(this, " (%s required)",
264 glsl_es_version_string
);
266 _mesa_glsl_error(locp
, this, "%s in %s%s",
267 problem
, this->get_version_string(),
274 * Process a GLSL #version directive.
276 * \param version is the integer that follows the #version token.
278 * \param ident is a string identifier that follows the integer, if any is
279 * present. Otherwise NULL.
282 _mesa_glsl_parse_state::process_version_directive(YYLTYPE
*locp
, int version
,
285 bool es_token_present
= false;
287 if (strcmp(ident
, "es") == 0) {
288 es_token_present
= true;
289 } else if (version
>= 150) {
290 if (strcmp(ident
, "core") == 0) {
291 /* Accept the token. There's no need to record that this is
292 * a core profile shader since that's the only profile we support.
294 } else if (strcmp(ident
, "compatibility") == 0) {
295 _mesa_glsl_error(locp
, this,
296 "the compatibility profile is not supported");
298 _mesa_glsl_error(locp
, this,
299 "\"%s\" is not a valid shading language profile; "
300 "if present, it must be \"core\"", ident
);
303 _mesa_glsl_error(locp
, this,
304 "illegal text following version number");
308 this->es_shader
= es_token_present
;
309 if (version
== 100) {
310 if (es_token_present
) {
311 _mesa_glsl_error(locp
, this,
312 "GLSL 1.00 ES should be selected using "
315 this->es_shader
= true;
319 if (this->es_shader
) {
320 this->ARB_texture_rectangle_enable
= false;
323 this->language_version
= version
;
325 bool supported
= false;
326 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
327 if (this->supported_versions
[i
].ver
== (unsigned) version
328 && this->supported_versions
[i
].es
== this->es_shader
) {
335 _mesa_glsl_error(locp
, this, "%s is not supported. "
336 "Supported versions are: %s",
337 this->get_version_string(),
338 this->supported_version_string
);
340 /* On exit, the language_version must be set to a valid value.
341 * Later calls to _mesa_glsl_initialize_types will misbehave if
342 * the version is invalid.
344 switch (this->ctx
->API
) {
345 case API_OPENGL_COMPAT
:
346 case API_OPENGL_CORE
:
347 this->language_version
= this->ctx
->Const
.GLSLVersion
;
351 assert(!"Should not get here.");
355 this->language_version
= 100;
363 * Translate a gl_shader_stage to a short shader stage name for debug
364 * printouts and error messages.
367 _mesa_shader_stage_to_string(unsigned stage
)
370 case MESA_SHADER_VERTEX
: return "vertex";
371 case MESA_SHADER_FRAGMENT
: return "fragment";
372 case MESA_SHADER_GEOMETRY
: return "geometry";
375 assert(!"Should not get here.");
379 /* This helper function will append the given message to the shader's
380 info log and report it via GL_ARB_debug_output. Per that extension,
381 'type' is one of the enum values classifying the message, and
382 'id' is the implementation-defined ID of the given message. */
384 _mesa_glsl_msg(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
385 GLenum type
, const char *fmt
, va_list ap
)
387 bool error
= (type
== MESA_DEBUG_TYPE_ERROR
);
390 assert(state
->info_log
!= NULL
);
392 /* Get the offset that the new message will be written to. */
393 int msg_offset
= strlen(state
->info_log
);
395 ralloc_asprintf_append(&state
->info_log
, "%u:%u(%u): %s: ",
399 error
? "error" : "warning");
400 ralloc_vasprintf_append(&state
->info_log
, fmt
, ap
);
402 const char *const msg
= &state
->info_log
[msg_offset
];
403 struct gl_context
*ctx
= state
->ctx
;
405 /* Report the error via GL_ARB_debug_output. */
406 _mesa_shader_debug(ctx
, type
, &msg_id
, msg
, strlen(msg
));
408 ralloc_strcat(&state
->info_log
, "\n");
412 _mesa_glsl_error(YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
413 const char *fmt
, ...)
420 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_ERROR
, fmt
, ap
);
426 _mesa_glsl_warning(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
427 const char *fmt
, ...)
432 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_OTHER
, fmt
, ap
);
438 * Enum representing the possible behaviors that can be specified in
439 * an #extension directive.
449 * Element type for _mesa_glsl_supported_extensions
451 struct _mesa_glsl_extension
{
453 * Name of the extension when referred to in a GLSL extension
458 /** True if this extension is available to desktop GL shaders */
461 /** True if this extension is available to GLES shaders */
465 * Flag in the gl_extensions struct indicating whether this
466 * extension is supported by the driver, or
467 * &gl_extensions::dummy_true if supported by all drivers.
469 * Note: the type (GLboolean gl_extensions::*) is a "pointer to
470 * member" type, the type-safe alternative to the "offsetof" macro.
473 * - foo bar::* p declares p to be an "offset" to a field of type
474 * foo that exists within struct bar
475 * - &bar::baz computes the "offset" of field baz within struct bar
476 * - x.*p accesses the field of x that exists at "offset" p
477 * - x->*p is equivalent to (*x).*p
479 const GLboolean
gl_extensions::* supported_flag
;
482 * Flag in the _mesa_glsl_parse_state struct that should be set
483 * when this extension is enabled.
485 * See note in _mesa_glsl_extension::supported_flag about "pointer
488 bool _mesa_glsl_parse_state::* enable_flag
;
491 * Flag in the _mesa_glsl_parse_state struct that should be set
492 * when the shader requests "warn" behavior for this extension.
494 * See note in _mesa_glsl_extension::supported_flag about "pointer
497 bool _mesa_glsl_parse_state::* warn_flag
;
500 bool compatible_with_state(const _mesa_glsl_parse_state
*state
) const;
501 void set_flags(_mesa_glsl_parse_state
*state
, ext_behavior behavior
) const;
504 #define EXT(NAME, GL, ES, SUPPORTED_FLAG) \
505 { "GL_" #NAME, GL, ES, &gl_extensions::SUPPORTED_FLAG, \
506 &_mesa_glsl_parse_state::NAME##_enable, \
507 &_mesa_glsl_parse_state::NAME##_warn }
510 * Table of extensions that can be enabled/disabled within a shader,
511 * and the conditions under which they are supported.
513 static const _mesa_glsl_extension _mesa_glsl_supported_extensions
[] = {
514 /* API availability */
515 /* name GL ES supported flag */
517 /* ARB extensions go here, sorted alphabetically.
519 EXT(ARB_arrays_of_arrays
, true, false, ARB_arrays_of_arrays
),
520 EXT(ARB_compute_shader
, true, false, ARB_compute_shader
),
521 EXT(ARB_conservative_depth
, true, false, ARB_conservative_depth
),
522 EXT(ARB_derivative_control
, true, false, ARB_derivative_control
),
523 EXT(ARB_draw_buffers
, true, false, dummy_true
),
524 EXT(ARB_draw_instanced
, true, false, ARB_draw_instanced
),
525 EXT(ARB_explicit_attrib_location
, true, false, ARB_explicit_attrib_location
),
526 EXT(ARB_explicit_uniform_location
, true, false, ARB_explicit_uniform_location
),
527 EXT(ARB_fragment_coord_conventions
, true, false, ARB_fragment_coord_conventions
),
528 EXT(ARB_fragment_layer_viewport
, true, false, ARB_fragment_layer_viewport
),
529 EXT(ARB_gpu_shader5
, true, false, ARB_gpu_shader5
),
530 EXT(ARB_gpu_shader_fp64
, true, false, ARB_gpu_shader_fp64
),
531 EXT(ARB_sample_shading
, true, false, ARB_sample_shading
),
532 EXT(ARB_separate_shader_objects
, true, false, dummy_true
),
533 EXT(ARB_shader_atomic_counters
, true, false, ARB_shader_atomic_counters
),
534 EXT(ARB_shader_bit_encoding
, true, false, ARB_shader_bit_encoding
),
535 EXT(ARB_shader_image_load_store
, true, false, ARB_shader_image_load_store
),
536 EXT(ARB_shader_precision
, true, false, ARB_shader_precision
),
537 EXT(ARB_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
538 EXT(ARB_shader_texture_lod
, true, false, ARB_shader_texture_lod
),
539 EXT(ARB_shading_language_420pack
, true, false, ARB_shading_language_420pack
),
540 EXT(ARB_shading_language_packing
, true, false, ARB_shading_language_packing
),
541 EXT(ARB_texture_cube_map_array
, true, false, ARB_texture_cube_map_array
),
542 EXT(ARB_texture_gather
, true, false, ARB_texture_gather
),
543 EXT(ARB_texture_multisample
, true, false, ARB_texture_multisample
),
544 EXT(ARB_texture_query_levels
, true, false, ARB_texture_query_levels
),
545 EXT(ARB_texture_query_lod
, true, false, ARB_texture_query_lod
),
546 EXT(ARB_texture_rectangle
, true, false, dummy_true
),
547 EXT(ARB_uniform_buffer_object
, true, false, ARB_uniform_buffer_object
),
548 EXT(ARB_viewport_array
, true, false, ARB_viewport_array
),
550 /* KHR extensions go here, sorted alphabetically.
553 /* OES extensions go here, sorted alphabetically.
555 EXT(OES_EGL_image_external
, false, true, OES_EGL_image_external
),
556 EXT(OES_standard_derivatives
, false, true, OES_standard_derivatives
),
557 EXT(OES_texture_3D
, false, true, EXT_texture3D
),
559 /* All other extensions go here, sorted alphabetically.
561 EXT(AMD_conservative_depth
, true, false, ARB_conservative_depth
),
562 EXT(AMD_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
563 EXT(AMD_shader_trinary_minmax
, true, false, dummy_true
),
564 EXT(AMD_vertex_shader_layer
, true, false, AMD_vertex_shader_layer
),
565 EXT(AMD_vertex_shader_viewport_index
, true, false, AMD_vertex_shader_viewport_index
),
566 EXT(EXT_draw_buffers
, false, true, dummy_true
),
567 EXT(EXT_separate_shader_objects
, false, true, dummy_true
),
568 EXT(EXT_shader_integer_mix
, true, true, EXT_shader_integer_mix
),
569 EXT(EXT_texture_array
, true, false, EXT_texture_array
),
576 * Determine whether a given extension is compatible with the target,
577 * API, and extension information in the current parser state.
579 bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state
*
582 /* Check that this extension matches whether we are compiling
583 * for desktop GL or GLES.
585 if (state
->es_shader
) {
586 if (!this->avail_in_ES
) return false;
588 if (!this->avail_in_GL
) return false;
591 /* Check that this extension is supported by the OpenGL
594 * Note: the ->* operator indexes into state->extensions by the
595 * offset this->supported_flag. See
596 * _mesa_glsl_extension::supported_flag for more info.
598 return state
->extensions
->*(this->supported_flag
);
602 * Set the appropriate flags in the parser state to establish the
603 * given behavior for this extension.
605 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state
*state
,
606 ext_behavior behavior
) const
608 /* Note: the ->* operator indexes into state by the
609 * offsets this->enable_flag and this->warn_flag. See
610 * _mesa_glsl_extension::supported_flag for more info.
612 state
->*(this->enable_flag
) = (behavior
!= extension_disable
);
613 state
->*(this->warn_flag
) = (behavior
== extension_warn
);
617 * Find an extension by name in _mesa_glsl_supported_extensions. If
618 * the name is not found, return NULL.
620 static const _mesa_glsl_extension
*find_extension(const char *name
)
622 for (unsigned i
= 0; i
< Elements(_mesa_glsl_supported_extensions
); ++i
) {
623 if (strcmp(name
, _mesa_glsl_supported_extensions
[i
].name
) == 0) {
624 return &_mesa_glsl_supported_extensions
[i
];
632 _mesa_glsl_process_extension(const char *name
, YYLTYPE
*name_locp
,
633 const char *behavior_string
, YYLTYPE
*behavior_locp
,
634 _mesa_glsl_parse_state
*state
)
636 ext_behavior behavior
;
637 if (strcmp(behavior_string
, "warn") == 0) {
638 behavior
= extension_warn
;
639 } else if (strcmp(behavior_string
, "require") == 0) {
640 behavior
= extension_require
;
641 } else if (strcmp(behavior_string
, "enable") == 0) {
642 behavior
= extension_enable
;
643 } else if (strcmp(behavior_string
, "disable") == 0) {
644 behavior
= extension_disable
;
646 _mesa_glsl_error(behavior_locp
, state
,
647 "unknown extension behavior `%s'",
652 if (strcmp(name
, "all") == 0) {
653 if ((behavior
== extension_enable
) || (behavior
== extension_require
)) {
654 _mesa_glsl_error(name_locp
, state
, "cannot %s all extensions",
655 (behavior
== extension_enable
)
656 ? "enable" : "require");
660 i
< Elements(_mesa_glsl_supported_extensions
); ++i
) {
661 const _mesa_glsl_extension
*extension
662 = &_mesa_glsl_supported_extensions
[i
];
663 if (extension
->compatible_with_state(state
)) {
664 _mesa_glsl_supported_extensions
[i
].set_flags(state
, behavior
);
669 const _mesa_glsl_extension
*extension
= find_extension(name
);
670 if (extension
&& extension
->compatible_with_state(state
)) {
671 extension
->set_flags(state
, behavior
);
673 static const char fmt
[] = "extension `%s' unsupported in %s shader";
675 if (behavior
== extension_require
) {
676 _mesa_glsl_error(name_locp
, state
, fmt
,
677 name
, _mesa_shader_stage_to_string(state
->stage
));
680 _mesa_glsl_warning(name_locp
, state
, fmt
,
681 name
, _mesa_shader_stage_to_string(state
->stage
));
691 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
692 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
693 * (process_array_constructor, et al) sufficient information to do type
696 * Operates on assignments involving an aggregate initializer. E.g.,
698 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
700 * or more ridiculously,
713 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
714 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
719 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
720 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
726 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
727 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
733 * This pass is necessary because the right-hand side of <type> e = { ... }
734 * doesn't contain sufficient information to determine if the types match.
737 _mesa_ast_set_aggregate_type(const glsl_type
*type
,
738 ast_expression
*expr
)
740 ast_aggregate_initializer
*ai
= (ast_aggregate_initializer
*)expr
;
741 ai
->constructor_type
= type
;
743 /* If the aggregate is an array, recursively set its elements' types. */
744 if (type
->is_array()) {
745 /* Each array element has the type type->element_type().
747 * E.g., if <type> if struct S[2] we want to set each element's type to
750 for (exec_node
*expr_node
= ai
->expressions
.head
;
751 !expr_node
->is_tail_sentinel();
752 expr_node
= expr_node
->next
) {
753 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
756 if (expr
->oper
== ast_aggregate
)
757 _mesa_ast_set_aggregate_type(type
->element_type(), expr
);
760 /* If the aggregate is a struct, recursively set its fields' types. */
761 } else if (type
->is_record()) {
762 exec_node
*expr_node
= ai
->expressions
.head
;
764 /* Iterate through the struct's fields. */
765 for (unsigned i
= 0; !expr_node
->is_tail_sentinel() && i
< type
->length
;
766 i
++, expr_node
= expr_node
->next
) {
767 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
770 if (expr
->oper
== ast_aggregate
) {
771 _mesa_ast_set_aggregate_type(type
->fields
.structure
[i
].type
, expr
);
774 /* If the aggregate is a matrix, set its columns' types. */
775 } else if (type
->is_matrix()) {
776 for (exec_node
*expr_node
= ai
->expressions
.head
;
777 !expr_node
->is_tail_sentinel();
778 expr_node
= expr_node
->next
) {
779 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
782 if (expr
->oper
== ast_aggregate
)
783 _mesa_ast_set_aggregate_type(type
->column_type(), expr
);
790 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier
*q
)
792 if (q
->flags
.q
.constant
)
795 if (q
->flags
.q
.invariant
)
796 printf("invariant ");
798 if (q
->flags
.q
.attribute
)
799 printf("attribute ");
801 if (q
->flags
.q
.varying
)
804 if (q
->flags
.q
.in
&& q
->flags
.q
.out
)
814 if (q
->flags
.q
.centroid
)
816 if (q
->flags
.q
.sample
)
818 if (q
->flags
.q
.uniform
)
820 if (q
->flags
.q
.smooth
)
824 if (q
->flags
.q
.noperspective
)
825 printf("noperspective ");
830 ast_node::print(void) const
832 printf("unhandled node ");
836 ast_node::ast_node(void)
838 this->location
.source
= 0;
839 this->location
.first_line
= 0;
840 this->location
.first_column
= 0;
841 this->location
.last_line
= 0;
842 this->location
.last_column
= 0;
847 ast_opt_array_dimensions_print(const ast_array_specifier
*array_specifier
)
850 array_specifier
->print();
855 ast_compound_statement::print(void) const
859 foreach_list_typed(ast_node
, ast
, link
, &this->statements
) {
867 ast_compound_statement::ast_compound_statement(int new_scope
,
868 ast_node
*statements
)
870 this->new_scope
= new_scope
;
872 if (statements
!= NULL
) {
873 this->statements
.push_degenerate_list_at_head(&statements
->link
);
879 ast_expression::print(void) const
893 subexpressions
[0]->print();
894 printf("%s ", operator_string(oper
));
895 subexpressions
[1]->print();
898 case ast_field_selection
:
899 subexpressions
[0]->print();
900 printf(". %s ", primary_expression
.identifier
);
909 printf("%s ", operator_string(oper
));
910 subexpressions
[0]->print();
915 subexpressions
[0]->print();
916 printf("%s ", operator_string(oper
));
919 case ast_conditional
:
920 subexpressions
[0]->print();
922 subexpressions
[1]->print();
924 subexpressions
[2]->print();
927 case ast_array_index
:
928 subexpressions
[0]->print();
930 subexpressions
[1]->print();
934 case ast_function_call
: {
935 subexpressions
[0]->print();
938 foreach_list_typed (ast_node
, ast
, link
, &this->expressions
) {
939 if (&ast
->link
!= this->expressions
.get_head())
950 printf("%s ", primary_expression
.identifier
);
953 case ast_int_constant
:
954 printf("%d ", primary_expression
.int_constant
);
957 case ast_uint_constant
:
958 printf("%u ", primary_expression
.uint_constant
);
961 case ast_float_constant
:
962 printf("%f ", primary_expression
.float_constant
);
965 case ast_bool_constant
:
967 primary_expression
.bool_constant
973 foreach_list_typed (ast_node
, ast
, link
, & this->expressions
) {
974 if (&ast
->link
!= this->expressions
.get_head())
983 case ast_aggregate
: {
985 foreach_list_typed (ast_node
, ast
, link
, & this->expressions
) {
986 if (&ast
->link
!= this->expressions
.get_head())
1001 ast_expression::ast_expression(int oper
,
1002 ast_expression
*ex0
,
1003 ast_expression
*ex1
,
1004 ast_expression
*ex2
) :
1005 primary_expression()
1007 this->oper
= ast_operators(oper
);
1008 this->subexpressions
[0] = ex0
;
1009 this->subexpressions
[1] = ex1
;
1010 this->subexpressions
[2] = ex2
;
1011 this->non_lvalue_description
= NULL
;
1016 ast_expression_statement::print(void) const
1019 expression
->print();
1025 ast_expression_statement::ast_expression_statement(ast_expression
*ex
) :
1033 ast_function::print(void) const
1035 return_type
->print();
1036 printf(" %s (", identifier
);
1038 foreach_list_typed(ast_node
, ast
, link
, & this->parameters
) {
1046 ast_function::ast_function(void)
1047 : return_type(NULL
), identifier(NULL
), is_definition(false),
1055 ast_fully_specified_type::print(void) const
1057 _mesa_ast_type_qualifier_print(& qualifier
);
1063 ast_parameter_declarator::print(void) const
1067 printf("%s ", identifier
);
1068 ast_opt_array_dimensions_print(array_specifier
);
1073 ast_function_definition::print(void) const
1081 ast_declaration::print(void) const
1083 printf("%s ", identifier
);
1084 ast_opt_array_dimensions_print(array_specifier
);
1088 initializer
->print();
1093 ast_declaration::ast_declaration(const char *identifier
,
1094 ast_array_specifier
*array_specifier
,
1095 ast_expression
*initializer
)
1097 this->identifier
= identifier
;
1098 this->array_specifier
= array_specifier
;
1099 this->initializer
= initializer
;
1104 ast_declarator_list::print(void) const
1106 assert(type
|| invariant
);
1111 printf("invariant ");
1115 foreach_list_typed (ast_node
, ast
, link
, & this->declarations
) {
1116 if (&ast
->link
!= this->declarations
.get_head())
1126 ast_declarator_list::ast_declarator_list(ast_fully_specified_type
*type
)
1129 this->invariant
= false;
1130 this->precise
= false;
1134 ast_jump_statement::print(void) const
1138 printf("continue; ");
1145 if (opt_return_value
)
1146 opt_return_value
->print();
1151 printf("discard; ");
1157 ast_jump_statement::ast_jump_statement(int mode
, ast_expression
*return_value
)
1158 : opt_return_value(NULL
)
1160 this->mode
= ast_jump_modes(mode
);
1162 if (mode
== ast_return
)
1163 opt_return_value
= return_value
;
1168 ast_selection_statement::print(void) const
1174 then_statement
->print();
1176 if (else_statement
) {
1178 else_statement
->print();
1184 ast_selection_statement::ast_selection_statement(ast_expression
*condition
,
1185 ast_node
*then_statement
,
1186 ast_node
*else_statement
)
1188 this->condition
= condition
;
1189 this->then_statement
= then_statement
;
1190 this->else_statement
= else_statement
;
1195 ast_switch_statement::print(void) const
1197 printf("switch ( ");
1198 test_expression
->print();
1205 ast_switch_statement::ast_switch_statement(ast_expression
*test_expression
,
1208 this->test_expression
= test_expression
;
1214 ast_switch_body::print(void) const
1217 if (stmts
!= NULL
) {
1224 ast_switch_body::ast_switch_body(ast_case_statement_list
*stmts
)
1226 this->stmts
= stmts
;
1230 void ast_case_label::print(void) const
1232 if (test_value
!= NULL
) {
1234 test_value
->print();
1237 printf("default: ");
1242 ast_case_label::ast_case_label(ast_expression
*test_value
)
1244 this->test_value
= test_value
;
1248 void ast_case_label_list::print(void) const
1250 foreach_list_typed(ast_node
, ast
, link
, & this->labels
) {
1257 ast_case_label_list::ast_case_label_list(void)
1262 void ast_case_statement::print(void) const
1265 foreach_list_typed(ast_node
, ast
, link
, & this->stmts
) {
1272 ast_case_statement::ast_case_statement(ast_case_label_list
*labels
)
1274 this->labels
= labels
;
1278 void ast_case_statement_list::print(void) const
1280 foreach_list_typed(ast_node
, ast
, link
, & this->cases
) {
1286 ast_case_statement_list::ast_case_statement_list(void)
1292 ast_iteration_statement::print(void) const
1298 init_statement
->print();
1305 if (rest_expression
)
1306 rest_expression
->print();
1332 ast_iteration_statement::ast_iteration_statement(int mode
,
1334 ast_node
*condition
,
1335 ast_expression
*rest_expression
,
1338 this->mode
= ast_iteration_modes(mode
);
1339 this->init_statement
= init
;
1340 this->condition
= condition
;
1341 this->rest_expression
= rest_expression
;
1347 ast_struct_specifier::print(void) const
1349 printf("struct %s { ", name
);
1350 foreach_list_typed(ast_node
, ast
, link
, &this->declarations
) {
1357 ast_struct_specifier::ast_struct_specifier(const char *identifier
,
1358 ast_declarator_list
*declarator_list
)
1360 if (identifier
== NULL
) {
1361 static mtx_t mutex
= _MTX_INITIALIZER_NP
;
1362 static unsigned anon_count
= 1;
1366 count
= anon_count
++;
1369 identifier
= ralloc_asprintf(this, "#anon_struct_%04x", count
);
1372 this->declarations
.push_degenerate_list_at_head(&declarator_list
->link
);
1373 is_declaration
= true;
1377 set_shader_inout_layout(struct gl_shader
*shader
,
1378 struct _mesa_glsl_parse_state
*state
)
1380 if (shader
->Stage
!= MESA_SHADER_GEOMETRY
) {
1381 /* Should have been prevented by the parser. */
1382 assert(!state
->in_qualifier
->flags
.i
);
1383 assert(!state
->out_qualifier
->flags
.i
);
1386 if (shader
->Stage
!= MESA_SHADER_COMPUTE
) {
1387 /* Should have been prevented by the parser. */
1388 assert(!state
->cs_input_local_size_specified
);
1391 if (shader
->Stage
!= MESA_SHADER_FRAGMENT
) {
1392 /* Should have been prevented by the parser. */
1393 assert(!state
->fs_uses_gl_fragcoord
);
1394 assert(!state
->fs_redeclares_gl_fragcoord
);
1395 assert(!state
->fs_pixel_center_integer
);
1396 assert(!state
->fs_origin_upper_left
);
1399 switch (shader
->Stage
) {
1400 case MESA_SHADER_GEOMETRY
:
1401 shader
->Geom
.VerticesOut
= 0;
1402 if (state
->out_qualifier
->flags
.q
.max_vertices
)
1403 shader
->Geom
.VerticesOut
= state
->out_qualifier
->max_vertices
;
1405 if (state
->gs_input_prim_type_specified
) {
1406 shader
->Geom
.InputType
= state
->in_qualifier
->prim_type
;
1408 shader
->Geom
.InputType
= PRIM_UNKNOWN
;
1411 if (state
->out_qualifier
->flags
.q
.prim_type
) {
1412 shader
->Geom
.OutputType
= state
->out_qualifier
->prim_type
;
1414 shader
->Geom
.OutputType
= PRIM_UNKNOWN
;
1417 shader
->Geom
.Invocations
= 0;
1418 if (state
->in_qualifier
->flags
.q
.invocations
)
1419 shader
->Geom
.Invocations
= state
->in_qualifier
->invocations
;
1422 case MESA_SHADER_COMPUTE
:
1423 if (state
->cs_input_local_size_specified
) {
1424 for (int i
= 0; i
< 3; i
++)
1425 shader
->Comp
.LocalSize
[i
] = state
->cs_input_local_size
[i
];
1427 for (int i
= 0; i
< 3; i
++)
1428 shader
->Comp
.LocalSize
[i
] = 0;
1432 case MESA_SHADER_FRAGMENT
:
1433 shader
->redeclares_gl_fragcoord
= state
->fs_redeclares_gl_fragcoord
;
1434 shader
->uses_gl_fragcoord
= state
->fs_uses_gl_fragcoord
;
1435 shader
->pixel_center_integer
= state
->fs_pixel_center_integer
;
1436 shader
->origin_upper_left
= state
->fs_origin_upper_left
;
1437 shader
->ARB_fragment_coord_conventions_enable
=
1438 state
->ARB_fragment_coord_conventions_enable
;
1442 /* Nothing to do. */
1450 _mesa_glsl_compile_shader(struct gl_context
*ctx
, struct gl_shader
*shader
,
1451 bool dump_ast
, bool dump_hir
)
1453 struct _mesa_glsl_parse_state
*state
=
1454 new(shader
) _mesa_glsl_parse_state(ctx
, shader
->Stage
, shader
);
1455 const char *source
= shader
->Source
;
1457 if (ctx
->Const
.GenerateTemporaryNames
)
1458 (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names
,
1461 state
->error
= glcpp_preprocess(state
, &source
, &state
->info_log
,
1462 &ctx
->Extensions
, ctx
);
1464 if (!state
->error
) {
1465 _mesa_glsl_lexer_ctor(state
, source
);
1466 _mesa_glsl_parse(state
);
1467 _mesa_glsl_lexer_dtor(state
);
1471 foreach_list_typed(ast_node
, ast
, link
, &state
->translation_unit
) {
1477 ralloc_free(shader
->ir
);
1478 shader
->ir
= new(shader
) exec_list
;
1479 if (!state
->error
&& !state
->translation_unit
.is_empty())
1480 _mesa_ast_to_hir(shader
->ir
, state
);
1482 if (!state
->error
) {
1483 validate_ir_tree(shader
->ir
);
1485 /* Print out the unoptimized IR. */
1487 _mesa_print_ir(stdout
, shader
->ir
, state
);
1492 if (!state
->error
&& !shader
->ir
->is_empty()) {
1493 struct gl_shader_compiler_options
*options
=
1494 &ctx
->Const
.ShaderCompilerOptions
[shader
->Stage
];
1496 /* Do some optimization at compile time to reduce shader IR size
1497 * and reduce later work if the same shader is linked multiple times
1499 while (do_common_optimization(shader
->ir
, false, false, options
,
1500 ctx
->Const
.NativeIntegers
))
1503 validate_ir_tree(shader
->ir
);
1505 enum ir_variable_mode other
;
1506 switch (shader
->Stage
) {
1507 case MESA_SHADER_VERTEX
:
1508 other
= ir_var_shader_in
;
1510 case MESA_SHADER_FRAGMENT
:
1511 other
= ir_var_shader_out
;
1514 /* Something invalid to ensure optimize_dead_builtin_uniforms
1515 * doesn't remove anything other than uniforms or constants.
1517 other
= ir_var_mode_count
;
1521 optimize_dead_builtin_variables(shader
->ir
, other
);
1523 validate_ir_tree(shader
->ir
);
1526 if (shader
->InfoLog
)
1527 ralloc_free(shader
->InfoLog
);
1529 shader
->symbols
= new(shader
->ir
) glsl_symbol_table
;
1530 shader
->CompileStatus
= !state
->error
;
1531 shader
->InfoLog
= state
->info_log
;
1532 shader
->Version
= state
->language_version
;
1533 shader
->IsES
= state
->es_shader
;
1534 shader
->uses_builtin_functions
= state
->uses_builtin_functions
;
1537 set_shader_inout_layout(shader
, state
);
1539 /* Retain any live IR, but trash the rest. */
1540 reparent_ir(shader
->ir
, shader
->ir
);
1542 /* Destroy the symbol table. Create a new symbol table that contains only
1543 * the variables and functions that still exist in the IR. The symbol
1544 * table will be used later during linking.
1546 * There must NOT be any freed objects still referenced by the symbol
1547 * table. That could cause the linker to dereference freed memory.
1549 * We don't have to worry about types or interface-types here because those
1550 * are fly-weights that are looked up by glsl_type.
1552 foreach_in_list (ir_instruction
, ir
, shader
->ir
) {
1553 switch (ir
->ir_type
) {
1554 case ir_type_function
:
1555 shader
->symbols
->add_function((ir_function
*) ir
);
1557 case ir_type_variable
: {
1558 ir_variable
*const var
= (ir_variable
*) ir
;
1560 if (var
->data
.mode
!= ir_var_temporary
)
1561 shader
->symbols
->add_variable(var
);
1569 delete state
->symbols
;
1575 * Do the set of common optimizations passes
1577 * \param ir List of instructions to be optimized
1578 * \param linked Is the shader linked? This enables
1579 * optimizations passes that remove code at
1580 * global scope and could cause linking to
1582 * \param uniform_locations_assigned Have locations already been assigned for
1583 * uniforms? This prevents the declarations
1584 * of unused uniforms from being removed.
1585 * The setting of this flag only matters if
1586 * \c linked is \c true.
1587 * \param max_unroll_iterations Maximum number of loop iterations to be
1588 * unrolled. Setting to 0 disables loop
1590 * \param options The driver's preferred shader options.
1593 do_common_optimization(exec_list
*ir
, bool linked
,
1594 bool uniform_locations_assigned
,
1595 const struct gl_shader_compiler_options
*options
,
1596 bool native_integers
)
1598 GLboolean progress
= GL_FALSE
;
1600 progress
= lower_instructions(ir
, SUB_TO_ADD_NEG
) || progress
;
1603 progress
= do_function_inlining(ir
) || progress
;
1604 progress
= do_dead_functions(ir
) || progress
;
1605 progress
= do_structure_splitting(ir
) || progress
;
1607 progress
= do_if_simplification(ir
) || progress
;
1608 progress
= opt_flatten_nested_if_blocks(ir
) || progress
;
1609 progress
= do_copy_propagation(ir
) || progress
;
1610 progress
= do_copy_propagation_elements(ir
) || progress
;
1612 if (options
->OptimizeForAOS
&& !linked
)
1613 progress
= opt_flip_matrices(ir
) || progress
;
1615 if (linked
&& options
->OptimizeForAOS
) {
1616 progress
= do_vectorize(ir
) || progress
;
1620 progress
= do_dead_code(ir
, uniform_locations_assigned
) || progress
;
1622 progress
= do_dead_code_unlinked(ir
) || progress
;
1623 progress
= do_dead_code_local(ir
) || progress
;
1624 progress
= do_tree_grafting(ir
) || progress
;
1625 progress
= do_constant_propagation(ir
) || progress
;
1627 progress
= do_constant_variable(ir
) || progress
;
1629 progress
= do_constant_variable_unlinked(ir
) || progress
;
1630 progress
= do_constant_folding(ir
) || progress
;
1631 progress
= do_minmax_prune(ir
) || progress
;
1632 progress
= do_cse(ir
) || progress
;
1633 progress
= do_rebalance_tree(ir
) || progress
;
1634 progress
= do_algebraic(ir
, native_integers
, options
) || progress
;
1635 progress
= do_lower_jumps(ir
) || progress
;
1636 progress
= do_vec_index_to_swizzle(ir
) || progress
;
1637 progress
= lower_vector_insert(ir
, false) || progress
;
1638 progress
= do_swizzle_swizzle(ir
) || progress
;
1639 progress
= do_noop_swizzle(ir
) || progress
;
1641 progress
= optimize_split_arrays(ir
, linked
) || progress
;
1642 progress
= optimize_redundant_jumps(ir
) || progress
;
1644 loop_state
*ls
= analyze_loop_variables(ir
);
1645 if (ls
->loop_found
) {
1646 progress
= set_loop_controls(ir
, ls
) || progress
;
1647 progress
= unroll_loops(ir
, ls
, options
) || progress
;
1657 * To be called at GL teardown time, this frees compiler datastructures.
1659 * After calling this, any previously compiled shaders and shader
1660 * programs would be invalid. So this should happen at approximately
1664 _mesa_destroy_shader_compiler(void)
1666 _mesa_destroy_shader_compiler_caches();
1668 _mesa_glsl_release_types();
1672 * Releases compiler caches to trade off performance for memory.
1674 * Intended to be used with glReleaseShaderCompiler().
1677 _mesa_destroy_shader_compiler_caches(void)
1679 _mesa_glsl_release_builtin_functions();