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/debug_output.h"
31 #include "main/shaderobj.h"
32 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
33 #include "util/ralloc.h"
35 #include "glsl_parser_extras.h"
36 #include "glsl_parser.h"
37 #include "ir_optimization.h"
38 #include "loop_analysis.h"
41 * Format a short human-readable description of the given GLSL version.
44 glsl_compute_version_string(void *mem_ctx
, bool is_es
, unsigned version
)
46 return ralloc_asprintf(mem_ctx
, "GLSL%s %d.%02d", is_es
? " ES" : "",
47 version
/ 100, version
% 100);
51 static const unsigned known_desktop_glsl_versions
[] =
52 { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450 };
53 static const unsigned known_desktop_gl_versions
[] =
54 { 20, 21, 30, 31, 32, 33, 40, 41, 42, 43, 44, 45 };
57 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context
*_ctx
,
58 gl_shader_stage stage
,
60 : ctx(_ctx
), cs_input_local_size_specified(false), cs_input_local_size(),
63 assert(stage
< MESA_SHADER_STAGES
);
67 this->translation_unit
.make_empty();
68 this->symbols
= new(mem_ctx
) glsl_symbol_table
;
70 this->info_log
= ralloc_strdup(mem_ctx
, "");
72 this->loop_nesting_ast
= NULL
;
74 this->uses_builtin_functions
= false;
76 /* Set default language version and extensions */
77 this->language_version
= 110;
78 this->forced_language_version
= ctx
->Const
.ForceGLSLVersion
;
79 this->zero_init
= ctx
->Const
.GLSLZeroInit
;
80 this->gl_version
= 20;
81 this->es_shader
= false;
82 this->ARB_texture_rectangle_enable
= true;
84 /* OpenGL ES 2.0 has different defaults from desktop GL. */
85 if (ctx
->API
== API_OPENGLES2
) {
86 this->language_version
= 100;
87 this->es_shader
= true;
88 this->ARB_texture_rectangle_enable
= false;
91 this->extensions
= &ctx
->Extensions
;
93 this->Const
.MaxLights
= ctx
->Const
.MaxLights
;
94 this->Const
.MaxClipPlanes
= ctx
->Const
.MaxClipPlanes
;
95 this->Const
.MaxTextureUnits
= ctx
->Const
.MaxTextureUnits
;
96 this->Const
.MaxTextureCoords
= ctx
->Const
.MaxTextureCoordUnits
;
97 this->Const
.MaxVertexAttribs
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAttribs
;
98 this->Const
.MaxVertexUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxUniformComponents
;
99 this->Const
.MaxVertexTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
;
100 this->Const
.MaxCombinedTextureImageUnits
= ctx
->Const
.MaxCombinedTextureImageUnits
;
101 this->Const
.MaxTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
;
102 this->Const
.MaxFragmentUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxUniformComponents
;
103 this->Const
.MinProgramTexelOffset
= ctx
->Const
.MinProgramTexelOffset
;
104 this->Const
.MaxProgramTexelOffset
= ctx
->Const
.MaxProgramTexelOffset
;
106 this->Const
.MaxDrawBuffers
= ctx
->Const
.MaxDrawBuffers
;
108 this->Const
.MaxDualSourceDrawBuffers
= ctx
->Const
.MaxDualSourceDrawBuffers
;
111 this->Const
.MaxVertexOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxOutputComponents
;
112 this->Const
.MaxGeometryInputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxInputComponents
;
113 this->Const
.MaxGeometryOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxOutputComponents
;
114 this->Const
.MaxFragmentInputComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxInputComponents
;
115 this->Const
.MaxGeometryTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
;
116 this->Const
.MaxGeometryOutputVertices
= ctx
->Const
.MaxGeometryOutputVertices
;
117 this->Const
.MaxGeometryTotalOutputComponents
= ctx
->Const
.MaxGeometryTotalOutputComponents
;
118 this->Const
.MaxGeometryUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxUniformComponents
;
120 this->Const
.MaxVertexAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicCounters
;
121 this->Const
.MaxTessControlAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxAtomicCounters
;
122 this->Const
.MaxTessEvaluationAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxAtomicCounters
;
123 this->Const
.MaxGeometryAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicCounters
;
124 this->Const
.MaxFragmentAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicCounters
;
125 this->Const
.MaxComputeAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxAtomicCounters
;
126 this->Const
.MaxCombinedAtomicCounters
= ctx
->Const
.MaxCombinedAtomicCounters
;
127 this->Const
.MaxAtomicBufferBindings
= ctx
->Const
.MaxAtomicBufferBindings
;
128 this->Const
.MaxVertexAtomicCounterBuffers
=
129 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicBuffers
;
130 this->Const
.MaxTessControlAtomicCounterBuffers
=
131 ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxAtomicBuffers
;
132 this->Const
.MaxTessEvaluationAtomicCounterBuffers
=
133 ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxAtomicBuffers
;
134 this->Const
.MaxGeometryAtomicCounterBuffers
=
135 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicBuffers
;
136 this->Const
.MaxFragmentAtomicCounterBuffers
=
137 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicBuffers
;
138 this->Const
.MaxComputeAtomicCounterBuffers
=
139 ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxAtomicBuffers
;
140 this->Const
.MaxCombinedAtomicCounterBuffers
=
141 ctx
->Const
.MaxCombinedAtomicBuffers
;
142 this->Const
.MaxAtomicCounterBufferSize
=
143 ctx
->Const
.MaxAtomicBufferSize
;
145 /* ARB_enhanced_layouts constants */
146 this->Const
.MaxTransformFeedbackBuffers
= ctx
->Const
.MaxTransformFeedbackBuffers
;
147 this->Const
.MaxTransformFeedbackInterleavedComponents
= ctx
->Const
.MaxTransformFeedbackInterleavedComponents
;
149 /* Compute shader constants */
150 for (unsigned i
= 0; i
< ARRAY_SIZE(this->Const
.MaxComputeWorkGroupCount
); i
++)
151 this->Const
.MaxComputeWorkGroupCount
[i
] = ctx
->Const
.MaxComputeWorkGroupCount
[i
];
152 for (unsigned i
= 0; i
< ARRAY_SIZE(this->Const
.MaxComputeWorkGroupSize
); i
++)
153 this->Const
.MaxComputeWorkGroupSize
[i
] = ctx
->Const
.MaxComputeWorkGroupSize
[i
];
155 this->Const
.MaxComputeTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxTextureImageUnits
;
156 this->Const
.MaxComputeUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxUniformComponents
;
158 this->Const
.MaxImageUnits
= ctx
->Const
.MaxImageUnits
;
159 this->Const
.MaxCombinedShaderOutputResources
= ctx
->Const
.MaxCombinedShaderOutputResources
;
160 this->Const
.MaxImageSamples
= ctx
->Const
.MaxImageSamples
;
161 this->Const
.MaxVertexImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxImageUniforms
;
162 this->Const
.MaxTessControlImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxImageUniforms
;
163 this->Const
.MaxTessEvaluationImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxImageUniforms
;
164 this->Const
.MaxGeometryImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxImageUniforms
;
165 this->Const
.MaxFragmentImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxImageUniforms
;
166 this->Const
.MaxComputeImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxImageUniforms
;
167 this->Const
.MaxCombinedImageUniforms
= ctx
->Const
.MaxCombinedImageUniforms
;
169 /* ARB_viewport_array */
170 this->Const
.MaxViewports
= ctx
->Const
.MaxViewports
;
172 /* tessellation shader constants */
173 this->Const
.MaxPatchVertices
= ctx
->Const
.MaxPatchVertices
;
174 this->Const
.MaxTessGenLevel
= ctx
->Const
.MaxTessGenLevel
;
175 this->Const
.MaxTessControlInputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxInputComponents
;
176 this->Const
.MaxTessControlOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxOutputComponents
;
177 this->Const
.MaxTessControlTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxTextureImageUnits
;
178 this->Const
.MaxTessEvaluationInputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxInputComponents
;
179 this->Const
.MaxTessEvaluationOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxOutputComponents
;
180 this->Const
.MaxTessEvaluationTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxTextureImageUnits
;
181 this->Const
.MaxTessPatchComponents
= ctx
->Const
.MaxTessPatchComponents
;
182 this->Const
.MaxTessControlTotalOutputComponents
= ctx
->Const
.MaxTessControlTotalOutputComponents
;
183 this->Const
.MaxTessControlUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxUniformComponents
;
184 this->Const
.MaxTessEvaluationUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxUniformComponents
;
186 /* GL 4.5 / OES_sample_variables */
187 this->Const
.MaxSamples
= ctx
->Const
.MaxSamples
;
189 this->current_function
= NULL
;
190 this->toplevel_ir
= NULL
;
191 this->found_return
= false;
192 this->all_invariant
= false;
193 this->user_structures
= NULL
;
194 this->num_user_structures
= 0;
195 this->num_subroutines
= 0;
196 this->subroutines
= NULL
;
197 this->num_subroutine_types
= 0;
198 this->subroutine_types
= NULL
;
200 /* supported_versions should be large enough to support the known desktop
201 * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
203 STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions
) + 4) ==
204 ARRAY_SIZE(this->supported_versions
));
206 /* Populate the list of supported GLSL versions */
207 /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
208 * the OpenGL 3.2 Core context is supported, this logic will need
209 * change. Older versions of GLSL are no longer supported
210 * outside the compatibility contexts of 3.x.
212 this->num_supported_versions
= 0;
213 if (_mesa_is_desktop_gl(ctx
)) {
214 for (unsigned i
= 0; i
< ARRAY_SIZE(known_desktop_glsl_versions
); i
++) {
215 if (known_desktop_glsl_versions
[i
] <= ctx
->Const
.GLSLVersion
) {
216 this->supported_versions
[this->num_supported_versions
].ver
217 = known_desktop_glsl_versions
[i
];
218 this->supported_versions
[this->num_supported_versions
].gl_ver
219 = known_desktop_gl_versions
[i
];
220 this->supported_versions
[this->num_supported_versions
].es
= false;
221 this->num_supported_versions
++;
225 if (ctx
->API
== API_OPENGLES2
|| ctx
->Extensions
.ARB_ES2_compatibility
) {
226 this->supported_versions
[this->num_supported_versions
].ver
= 100;
227 this->supported_versions
[this->num_supported_versions
].gl_ver
= 20;
228 this->supported_versions
[this->num_supported_versions
].es
= true;
229 this->num_supported_versions
++;
231 if (_mesa_is_gles3(ctx
) || ctx
->Extensions
.ARB_ES3_compatibility
) {
232 this->supported_versions
[this->num_supported_versions
].ver
= 300;
233 this->supported_versions
[this->num_supported_versions
].gl_ver
= 30;
234 this->supported_versions
[this->num_supported_versions
].es
= true;
235 this->num_supported_versions
++;
237 if (_mesa_is_gles31(ctx
) || ctx
->Extensions
.ARB_ES3_1_compatibility
) {
238 this->supported_versions
[this->num_supported_versions
].ver
= 310;
239 this->supported_versions
[this->num_supported_versions
].gl_ver
= 31;
240 this->supported_versions
[this->num_supported_versions
].es
= true;
241 this->num_supported_versions
++;
243 if ((ctx
->API
== API_OPENGLES2
&& ctx
->Version
>= 32) ||
244 ctx
->Extensions
.ARB_ES3_2_compatibility
) {
245 this->supported_versions
[this->num_supported_versions
].ver
= 320;
246 this->supported_versions
[this->num_supported_versions
].gl_ver
= 32;
247 this->supported_versions
[this->num_supported_versions
].es
= true;
248 this->num_supported_versions
++;
251 /* Create a string for use in error messages to tell the user which GLSL
252 * versions are supported.
254 char *supported
= ralloc_strdup(this, "");
255 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
256 unsigned ver
= this->supported_versions
[i
].ver
;
257 const char *const prefix
= (i
== 0)
259 : ((i
== this->num_supported_versions
- 1) ? ", and " : ", ");
260 const char *const suffix
= (this->supported_versions
[i
].es
) ? " ES" : "";
262 ralloc_asprintf_append(& supported
, "%s%u.%02u%s",
264 ver
/ 100, ver
% 100,
268 this->supported_version_string
= supported
;
270 if (ctx
->Const
.ForceGLSLExtensionsWarn
)
271 _mesa_glsl_process_extension("all", NULL
, "warn", NULL
, this);
273 this->default_uniform_qualifier
= new(this) ast_type_qualifier();
274 this->default_uniform_qualifier
->flags
.q
.shared
= 1;
275 this->default_uniform_qualifier
->flags
.q
.column_major
= 1;
276 this->default_uniform_qualifier
->is_default_qualifier
= true;
278 this->default_shader_storage_qualifier
= new(this) ast_type_qualifier();
279 this->default_shader_storage_qualifier
->flags
.q
.shared
= 1;
280 this->default_shader_storage_qualifier
->flags
.q
.column_major
= 1;
281 this->default_shader_storage_qualifier
->is_default_qualifier
= true;
283 this->fs_uses_gl_fragcoord
= false;
284 this->fs_redeclares_gl_fragcoord
= false;
285 this->fs_origin_upper_left
= false;
286 this->fs_pixel_center_integer
= false;
287 this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers
= false;
289 this->gs_input_prim_type_specified
= false;
290 this->tcs_output_vertices_specified
= false;
291 this->gs_input_size
= 0;
292 this->in_qualifier
= new(this) ast_type_qualifier();
293 this->out_qualifier
= new(this) ast_type_qualifier();
294 this->fs_early_fragment_tests
= false;
295 memset(this->atomic_counter_offsets
, 0,
296 sizeof(this->atomic_counter_offsets
));
297 this->allow_extension_directive_midshader
=
298 ctx
->Const
.AllowGLSLExtensionDirectiveMidShader
;
302 * Determine whether the current GLSL version is sufficiently high to support
303 * a certain feature, and generate an error message if it isn't.
305 * \param required_glsl_version and \c required_glsl_es_version are
306 * interpreted as they are in _mesa_glsl_parse_state::is_version().
308 * \param locp is the parser location where the error should be reported.
310 * \param fmt (and additional arguments) constitute a printf-style error
311 * message to report if the version check fails. Information about the
312 * current and required GLSL versions will be appended. So, for example, if
313 * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
314 * "foo unsupported") is called, the error message will be "foo unsupported in
315 * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
318 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version
,
319 unsigned required_glsl_es_version
,
320 YYLTYPE
*locp
, const char *fmt
, ...)
322 if (this->is_version(required_glsl_version
, required_glsl_es_version
))
327 char *problem
= ralloc_vasprintf(this, fmt
, args
);
329 const char *glsl_version_string
330 = glsl_compute_version_string(this, false, required_glsl_version
);
331 const char *glsl_es_version_string
332 = glsl_compute_version_string(this, true, required_glsl_es_version
);
333 const char *requirement_string
= "";
334 if (required_glsl_version
&& required_glsl_es_version
) {
335 requirement_string
= ralloc_asprintf(this, " (%s or %s required)",
337 glsl_es_version_string
);
338 } else if (required_glsl_version
) {
339 requirement_string
= ralloc_asprintf(this, " (%s required)",
340 glsl_version_string
);
341 } else if (required_glsl_es_version
) {
342 requirement_string
= ralloc_asprintf(this, " (%s required)",
343 glsl_es_version_string
);
345 _mesa_glsl_error(locp
, this, "%s in %s%s",
346 problem
, this->get_version_string(),
353 * Process a GLSL #version directive.
355 * \param version is the integer that follows the #version token.
357 * \param ident is a string identifier that follows the integer, if any is
358 * present. Otherwise NULL.
361 _mesa_glsl_parse_state::process_version_directive(YYLTYPE
*locp
, int version
,
364 bool es_token_present
= false;
366 if (strcmp(ident
, "es") == 0) {
367 es_token_present
= true;
368 } else if (version
>= 150) {
369 if (strcmp(ident
, "core") == 0) {
370 /* Accept the token. There's no need to record that this is
371 * a core profile shader since that's the only profile we support.
373 } else if (strcmp(ident
, "compatibility") == 0) {
374 _mesa_glsl_error(locp
, this,
375 "the compatibility profile is not supported");
377 _mesa_glsl_error(locp
, this,
378 "\"%s\" is not a valid shading language profile; "
379 "if present, it must be \"core\"", ident
);
382 _mesa_glsl_error(locp
, this,
383 "illegal text following version number");
387 this->es_shader
= es_token_present
;
388 if (version
== 100) {
389 if (es_token_present
) {
390 _mesa_glsl_error(locp
, this,
391 "GLSL 1.00 ES should be selected using "
394 this->es_shader
= true;
398 if (this->es_shader
) {
399 this->ARB_texture_rectangle_enable
= false;
402 if (this->forced_language_version
)
403 this->language_version
= this->forced_language_version
;
405 this->language_version
= version
;
407 bool supported
= false;
408 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
409 if (this->supported_versions
[i
].ver
== this->language_version
410 && this->supported_versions
[i
].es
== this->es_shader
) {
411 this->gl_version
= this->supported_versions
[i
].gl_ver
;
418 _mesa_glsl_error(locp
, this, "%s is not supported. "
419 "Supported versions are: %s",
420 this->get_version_string(),
421 this->supported_version_string
);
423 /* On exit, the language_version must be set to a valid value.
424 * Later calls to _mesa_glsl_initialize_types will misbehave if
425 * the version is invalid.
427 switch (this->ctx
->API
) {
428 case API_OPENGL_COMPAT
:
429 case API_OPENGL_CORE
:
430 this->language_version
= this->ctx
->Const
.GLSLVersion
;
434 assert(!"Should not get here.");
438 this->language_version
= 100;
445 /* This helper function will append the given message to the shader's
446 info log and report it via GL_ARB_debug_output. Per that extension,
447 'type' is one of the enum values classifying the message, and
448 'id' is the implementation-defined ID of the given message. */
450 _mesa_glsl_msg(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
451 GLenum type
, const char *fmt
, va_list ap
)
453 bool error
= (type
== MESA_DEBUG_TYPE_ERROR
);
456 assert(state
->info_log
!= NULL
);
458 /* Get the offset that the new message will be written to. */
459 int msg_offset
= strlen(state
->info_log
);
461 ralloc_asprintf_append(&state
->info_log
, "%u:%u(%u): %s: ",
465 error
? "error" : "warning");
466 ralloc_vasprintf_append(&state
->info_log
, fmt
, ap
);
468 const char *const msg
= &state
->info_log
[msg_offset
];
469 struct gl_context
*ctx
= state
->ctx
;
471 /* Report the error via GL_ARB_debug_output. */
472 _mesa_shader_debug(ctx
, type
, &msg_id
, msg
);
474 ralloc_strcat(&state
->info_log
, "\n");
478 _mesa_glsl_error(YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
479 const char *fmt
, ...)
486 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_ERROR
, fmt
, ap
);
492 _mesa_glsl_warning(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
493 const char *fmt
, ...)
498 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_OTHER
, fmt
, ap
);
504 * Enum representing the possible behaviors that can be specified in
505 * an #extension directive.
515 * Element type for _mesa_glsl_supported_extensions
517 struct _mesa_glsl_extension
{
519 * Name of the extension when referred to in a GLSL extension
525 * Predicate that checks whether the relevant extension is available for
528 bool (*available_pred
)(const struct gl_context
*,
529 gl_api api
, uint8_t version
);
532 * Flag in the _mesa_glsl_parse_state struct that should be set
533 * when this extension is enabled.
535 * See note in _mesa_glsl_extension::supported_flag about "pointer
538 bool _mesa_glsl_parse_state::* enable_flag
;
541 * Flag in the _mesa_glsl_parse_state struct that should be set
542 * when the shader requests "warn" behavior for this extension.
544 * See note in _mesa_glsl_extension::supported_flag about "pointer
547 bool _mesa_glsl_parse_state::* warn_flag
;
550 bool compatible_with_state(const _mesa_glsl_parse_state
*state
,
551 gl_api api
, uint8_t gl_version
) const;
552 void set_flags(_mesa_glsl_parse_state
*state
, ext_behavior behavior
) const;
555 /** Checks if the context supports a user-facing extension */
556 #define EXT(name_str, driver_cap, ...) \
557 static MAYBE_UNUSED bool \
558 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
560 return ctx->Extensions.driver_cap && (version >= \
561 _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
563 #include "main/extensions_table.h"
567 { "GL_" #NAME, has_##NAME, \
568 &_mesa_glsl_parse_state::NAME##_enable, \
569 &_mesa_glsl_parse_state::NAME##_warn }
572 * Table of extensions that can be enabled/disabled within a shader,
573 * and the conditions under which they are supported.
575 static const _mesa_glsl_extension _mesa_glsl_supported_extensions
[] = {
576 /* ARB extensions go here, sorted alphabetically.
578 EXT(ARB_ES3_1_compatibility
),
579 EXT(ARB_ES3_2_compatibility
),
580 EXT(ARB_arrays_of_arrays
),
581 EXT(ARB_compute_shader
),
582 EXT(ARB_conservative_depth
),
583 EXT(ARB_cull_distance
),
584 EXT(ARB_derivative_control
),
585 EXT(ARB_draw_buffers
),
586 EXT(ARB_draw_instanced
),
587 EXT(ARB_enhanced_layouts
),
588 EXT(ARB_explicit_attrib_location
),
589 EXT(ARB_explicit_uniform_location
),
590 EXT(ARB_fragment_coord_conventions
),
591 EXT(ARB_fragment_layer_viewport
),
592 EXT(ARB_gpu_shader5
),
593 EXT(ARB_gpu_shader_fp64
),
594 EXT(ARB_sample_shading
),
595 EXT(ARB_separate_shader_objects
),
596 EXT(ARB_shader_atomic_counter_ops
),
597 EXT(ARB_shader_atomic_counters
),
598 EXT(ARB_shader_bit_encoding
),
599 EXT(ARB_shader_clock
),
600 EXT(ARB_shader_draw_parameters
),
601 EXT(ARB_shader_group_vote
),
602 EXT(ARB_shader_image_load_store
),
603 EXT(ARB_shader_image_size
),
604 EXT(ARB_shader_precision
),
605 EXT(ARB_shader_stencil_export
),
606 EXT(ARB_shader_storage_buffer_object
),
607 EXT(ARB_shader_subroutine
),
608 EXT(ARB_shader_texture_image_samples
),
609 EXT(ARB_shader_texture_lod
),
610 EXT(ARB_shading_language_420pack
),
611 EXT(ARB_shading_language_packing
),
612 EXT(ARB_tessellation_shader
),
613 EXT(ARB_texture_cube_map_array
),
614 EXT(ARB_texture_gather
),
615 EXT(ARB_texture_multisample
),
616 EXT(ARB_texture_query_levels
),
617 EXT(ARB_texture_query_lod
),
618 EXT(ARB_texture_rectangle
),
619 EXT(ARB_uniform_buffer_object
),
620 EXT(ARB_vertex_attrib_64bit
),
621 EXT(ARB_viewport_array
),
623 /* KHR extensions go here, sorted alphabetically.
625 EXT(KHR_blend_equation_advanced
),
627 /* OES extensions go here, sorted alphabetically.
629 EXT(OES_EGL_image_external
),
630 EXT(OES_geometry_point_size
),
631 EXT(OES_geometry_shader
),
632 EXT(OES_gpu_shader5
),
633 EXT(OES_sample_variables
),
634 EXT(OES_shader_image_atomic
),
635 EXT(OES_shader_io_blocks
),
636 EXT(OES_shader_multisample_interpolation
),
637 EXT(OES_standard_derivatives
),
638 EXT(OES_tessellation_point_size
),
639 EXT(OES_tessellation_shader
),
641 EXT(OES_texture_buffer
),
642 EXT(OES_texture_storage_multisample_2d_array
),
644 /* All other extensions go here, sorted alphabetically.
646 EXT(AMD_conservative_depth
),
647 EXT(AMD_shader_stencil_export
),
648 EXT(AMD_shader_trinary_minmax
),
649 EXT(AMD_vertex_shader_layer
),
650 EXT(AMD_vertex_shader_viewport_index
),
651 EXT(EXT_blend_func_extended
),
652 EXT(EXT_draw_buffers
),
653 EXT(EXT_clip_cull_distance
),
654 EXT(EXT_gpu_shader5
),
655 EXT(EXT_separate_shader_objects
),
656 EXT(EXT_shader_framebuffer_fetch
),
657 EXT(EXT_shader_integer_mix
),
658 EXT(EXT_shader_io_blocks
),
659 EXT(EXT_shader_samples_identical
),
660 EXT(EXT_tessellation_point_size
),
661 EXT(EXT_tessellation_shader
),
662 EXT(EXT_texture_array
),
663 EXT(EXT_texture_buffer
),
664 EXT(MESA_shader_integer_functions
),
671 * Determine whether a given extension is compatible with the target,
672 * API, and extension information in the current parser state.
674 bool _mesa_glsl_extension::compatible_with_state(
675 const _mesa_glsl_parse_state
*state
, gl_api api
, uint8_t gl_version
) const
677 return this->available_pred(state
->ctx
, api
, gl_version
);
681 * Set the appropriate flags in the parser state to establish the
682 * given behavior for this extension.
684 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state
*state
,
685 ext_behavior behavior
) const
687 /* Note: the ->* operator indexes into state by the
688 * offsets this->enable_flag and this->warn_flag. See
689 * _mesa_glsl_extension::supported_flag for more info.
691 state
->*(this->enable_flag
) = (behavior
!= extension_disable
);
692 state
->*(this->warn_flag
) = (behavior
== extension_warn
);
696 * Find an extension by name in _mesa_glsl_supported_extensions. If
697 * the name is not found, return NULL.
699 static const _mesa_glsl_extension
*find_extension(const char *name
)
701 for (unsigned i
= 0; i
< ARRAY_SIZE(_mesa_glsl_supported_extensions
); ++i
) {
702 if (strcmp(name
, _mesa_glsl_supported_extensions
[i
].name
) == 0) {
703 return &_mesa_glsl_supported_extensions
[i
];
711 _mesa_glsl_process_extension(const char *name
, YYLTYPE
*name_locp
,
712 const char *behavior_string
, YYLTYPE
*behavior_locp
,
713 _mesa_glsl_parse_state
*state
)
715 uint8_t gl_version
= state
->ctx
->Extensions
.Version
;
716 gl_api api
= state
->ctx
->API
;
717 ext_behavior behavior
;
718 if (strcmp(behavior_string
, "warn") == 0) {
719 behavior
= extension_warn
;
720 } else if (strcmp(behavior_string
, "require") == 0) {
721 behavior
= extension_require
;
722 } else if (strcmp(behavior_string
, "enable") == 0) {
723 behavior
= extension_enable
;
724 } else if (strcmp(behavior_string
, "disable") == 0) {
725 behavior
= extension_disable
;
727 _mesa_glsl_error(behavior_locp
, state
,
728 "unknown extension behavior `%s'",
733 /* If we're in a desktop context but with an ES shader, use an ES API enum
734 * to verify extension availability.
736 if (state
->es_shader
&& api
!= API_OPENGLES2
)
738 /* Use the language-version derived GL version to extension checks, unless
739 * we're using meta, which sets the version to the max.
741 if (gl_version
!= 0xff)
742 gl_version
= state
->gl_version
;
744 if (strcmp(name
, "all") == 0) {
745 if ((behavior
== extension_enable
) || (behavior
== extension_require
)) {
746 _mesa_glsl_error(name_locp
, state
, "cannot %s all extensions",
747 (behavior
== extension_enable
)
748 ? "enable" : "require");
752 i
< ARRAY_SIZE(_mesa_glsl_supported_extensions
); ++i
) {
753 const _mesa_glsl_extension
*extension
754 = &_mesa_glsl_supported_extensions
[i
];
755 if (extension
->compatible_with_state(state
, api
, gl_version
)) {
756 _mesa_glsl_supported_extensions
[i
].set_flags(state
, behavior
);
761 const _mesa_glsl_extension
*extension
= find_extension(name
);
762 if (extension
&& extension
->compatible_with_state(state
, api
, gl_version
)) {
763 extension
->set_flags(state
, behavior
);
765 static const char fmt
[] = "extension `%s' unsupported in %s shader";
767 if (behavior
== extension_require
) {
768 _mesa_glsl_error(name_locp
, state
, fmt
,
769 name
, _mesa_shader_stage_to_string(state
->stage
));
772 _mesa_glsl_warning(name_locp
, state
, fmt
,
773 name
, _mesa_shader_stage_to_string(state
->stage
));
783 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
784 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
785 * (process_array_constructor, et al) sufficient information to do type
788 * Operates on assignments involving an aggregate initializer. E.g.,
790 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
792 * or more ridiculously,
805 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
806 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
811 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
812 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
818 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
819 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
825 * This pass is necessary because the right-hand side of <type> e = { ... }
826 * doesn't contain sufficient information to determine if the types match.
829 _mesa_ast_set_aggregate_type(const glsl_type
*type
,
830 ast_expression
*expr
)
832 ast_aggregate_initializer
*ai
= (ast_aggregate_initializer
*)expr
;
833 ai
->constructor_type
= type
;
835 /* If the aggregate is an array, recursively set its elements' types. */
836 if (type
->is_array()) {
837 /* Each array element has the type type->fields.array.
839 * E.g., if <type> if struct S[2] we want to set each element's type to
842 for (exec_node
*expr_node
= ai
->expressions
.get_head_raw();
843 !expr_node
->is_tail_sentinel();
844 expr_node
= expr_node
->next
) {
845 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
848 if (expr
->oper
== ast_aggregate
)
849 _mesa_ast_set_aggregate_type(type
->fields
.array
, expr
);
852 /* If the aggregate is a struct, recursively set its fields' types. */
853 } else if (type
->is_record()) {
854 exec_node
*expr_node
= ai
->expressions
.get_head_raw();
856 /* Iterate through the struct's fields. */
857 for (unsigned i
= 0; !expr_node
->is_tail_sentinel() && i
< type
->length
;
858 i
++, expr_node
= expr_node
->next
) {
859 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
862 if (expr
->oper
== ast_aggregate
) {
863 _mesa_ast_set_aggregate_type(type
->fields
.structure
[i
].type
, expr
);
866 /* If the aggregate is a matrix, set its columns' types. */
867 } else if (type
->is_matrix()) {
868 for (exec_node
*expr_node
= ai
->expressions
.get_head_raw();
869 !expr_node
->is_tail_sentinel();
870 expr_node
= expr_node
->next
) {
871 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
874 if (expr
->oper
== ast_aggregate
)
875 _mesa_ast_set_aggregate_type(type
->column_type(), expr
);
881 _mesa_ast_process_interface_block(YYLTYPE
*locp
,
882 _mesa_glsl_parse_state
*state
,
883 ast_interface_block
*const block
,
884 const struct ast_type_qualifier
&q
)
886 if (q
.flags
.q
.buffer
) {
887 if (!state
->has_shader_storage_buffer_objects()) {
888 _mesa_glsl_error(locp
, state
,
889 "#version 430 / GL_ARB_shader_storage_buffer_object "
890 "required for defining shader storage blocks");
891 } else if (state
->ARB_shader_storage_buffer_object_warn
) {
892 _mesa_glsl_warning(locp
, state
,
893 "#version 430 / GL_ARB_shader_storage_buffer_object "
894 "required for defining shader storage blocks");
896 } else if (q
.flags
.q
.uniform
) {
897 if (!state
->has_uniform_buffer_objects()) {
898 _mesa_glsl_error(locp
, state
,
899 "#version 140 / GL_ARB_uniform_buffer_object "
900 "required for defining uniform blocks");
901 } else if (state
->ARB_uniform_buffer_object_warn
) {
902 _mesa_glsl_warning(locp
, state
,
903 "#version 140 / GL_ARB_uniform_buffer_object "
904 "required for defining uniform blocks");
907 if (!state
->has_shader_io_blocks()) {
908 if (state
->es_shader
) {
909 _mesa_glsl_error(locp
, state
,
910 "GL_OES_shader_io_blocks or #version 320 "
911 "required for using interface blocks");
913 _mesa_glsl_error(locp
, state
,
914 "#version 150 required for using "
920 /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
921 * "It is illegal to have an input block in a vertex shader
922 * or an output block in a fragment shader"
924 if ((state
->stage
== MESA_SHADER_VERTEX
) && q
.flags
.q
.in
) {
925 _mesa_glsl_error(locp
, state
,
926 "`in' interface block is not allowed for "
928 } else if ((state
->stage
== MESA_SHADER_FRAGMENT
) && q
.flags
.q
.out
) {
929 _mesa_glsl_error(locp
, state
,
930 "`out' interface block is not allowed for "
931 "a fragment shader");
934 /* Since block arrays require names, and both features are added in
935 * the same language versions, we don't have to explicitly
936 * version-check both things.
938 if (block
->instance_name
!= NULL
) {
939 state
->check_version(150, 300, locp
, "interface blocks with "
940 "an instance name are not allowed");
943 uint64_t interface_type_mask
;
944 struct ast_type_qualifier temp_type_qualifier
;
946 /* Get a bitmask containing only the in/out/uniform/buffer
947 * flags, allowing us to ignore other irrelevant flags like
948 * interpolation qualifiers.
950 temp_type_qualifier
.flags
.i
= 0;
951 temp_type_qualifier
.flags
.q
.uniform
= true;
952 temp_type_qualifier
.flags
.q
.in
= true;
953 temp_type_qualifier
.flags
.q
.out
= true;
954 temp_type_qualifier
.flags
.q
.buffer
= true;
955 interface_type_mask
= temp_type_qualifier
.flags
.i
;
957 /* Get the block's interface qualifier. The interface_qualifier
958 * production rule guarantees that only one bit will be set (and
959 * it will be in/out/uniform).
961 uint64_t block_interface_qualifier
= q
.flags
.i
;
963 block
->layout
.flags
.i
|= block_interface_qualifier
;
965 if (state
->stage
== MESA_SHADER_GEOMETRY
&&
966 state
->has_explicit_attrib_stream() &&
967 block
->layout
.flags
.q
.out
) {
968 /* Assign global layout's stream value. */
969 block
->layout
.flags
.q
.stream
= 1;
970 block
->layout
.flags
.q
.explicit_stream
= 0;
971 block
->layout
.stream
= state
->out_qualifier
->stream
;
974 if (state
->has_enhanced_layouts() && block
->layout
.flags
.q
.out
) {
975 /* Assign global layout's xfb_buffer value. */
976 block
->layout
.flags
.q
.xfb_buffer
= 1;
977 block
->layout
.flags
.q
.explicit_xfb_buffer
= 0;
978 block
->layout
.xfb_buffer
= state
->out_qualifier
->xfb_buffer
;
981 foreach_list_typed (ast_declarator_list
, member
, link
, &block
->declarations
) {
982 ast_type_qualifier
& qualifier
= member
->type
->qualifier
;
983 if ((qualifier
.flags
.i
& interface_type_mask
) == 0) {
984 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
985 * "If no optional qualifier is used in a member declaration, the
986 * qualifier of the variable is just in, out, or uniform as declared
987 * by interface-qualifier."
989 qualifier
.flags
.i
|= block_interface_qualifier
;
990 } else if ((qualifier
.flags
.i
& interface_type_mask
) !=
991 block_interface_qualifier
) {
992 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
993 * "If optional qualifiers are used, they can include interpolation
994 * and storage qualifiers and they must declare an input, output,
995 * or uniform variable consistent with the interface qualifier of
998 _mesa_glsl_error(locp
, state
,
999 "uniform/in/out qualifier on "
1000 "interface block member does not match "
1001 "the interface block");
1004 if (!(q
.flags
.q
.in
|| q
.flags
.q
.out
) && qualifier
.flags
.q
.invariant
)
1005 _mesa_glsl_error(locp
, state
,
1006 "invariant qualifiers can be used only "
1007 "in interface block members for shader "
1008 "inputs or outputs");
1013 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier
*q
)
1015 if (q
->flags
.q
.subroutine
)
1016 printf("subroutine ");
1018 if (q
->flags
.q
.subroutine_def
) {
1019 printf("subroutine (");
1020 q
->subroutine_list
->print();
1024 if (q
->flags
.q
.constant
)
1027 if (q
->flags
.q
.invariant
)
1028 printf("invariant ");
1030 if (q
->flags
.q
.attribute
)
1031 printf("attribute ");
1033 if (q
->flags
.q
.varying
)
1036 if (q
->flags
.q
.in
&& q
->flags
.q
.out
)
1046 if (q
->flags
.q
.centroid
)
1047 printf("centroid ");
1048 if (q
->flags
.q
.sample
)
1050 if (q
->flags
.q
.patch
)
1052 if (q
->flags
.q
.uniform
)
1054 if (q
->flags
.q
.buffer
)
1056 if (q
->flags
.q
.smooth
)
1058 if (q
->flags
.q
.flat
)
1060 if (q
->flags
.q
.noperspective
)
1061 printf("noperspective ");
1066 ast_node::print(void) const
1068 printf("unhandled node ");
1072 ast_node::ast_node(void)
1074 this->location
.source
= 0;
1075 this->location
.first_line
= 0;
1076 this->location
.first_column
= 0;
1077 this->location
.last_line
= 0;
1078 this->location
.last_column
= 0;
1083 ast_opt_array_dimensions_print(const ast_array_specifier
*array_specifier
)
1085 if (array_specifier
)
1086 array_specifier
->print();
1091 ast_compound_statement::print(void) const
1095 foreach_list_typed(ast_node
, ast
, link
, &this->statements
) {
1103 ast_compound_statement::ast_compound_statement(int new_scope
,
1104 ast_node
*statements
)
1106 this->new_scope
= new_scope
;
1108 if (statements
!= NULL
) {
1109 this->statements
.push_degenerate_list_at_head(&statements
->link
);
1115 ast_expression::print(void) const
1119 case ast_mul_assign
:
1120 case ast_div_assign
:
1121 case ast_mod_assign
:
1122 case ast_add_assign
:
1123 case ast_sub_assign
:
1126 case ast_and_assign
:
1127 case ast_xor_assign
:
1129 subexpressions
[0]->print();
1130 printf("%s ", operator_string(oper
));
1131 subexpressions
[1]->print();
1134 case ast_field_selection
:
1135 subexpressions
[0]->print();
1136 printf(". %s ", primary_expression
.identifier
);
1145 printf("%s ", operator_string(oper
));
1146 subexpressions
[0]->print();
1151 subexpressions
[0]->print();
1152 printf("%s ", operator_string(oper
));
1155 case ast_conditional
:
1156 subexpressions
[0]->print();
1158 subexpressions
[1]->print();
1160 subexpressions
[2]->print();
1163 case ast_array_index
:
1164 subexpressions
[0]->print();
1166 subexpressions
[1]->print();
1170 case ast_function_call
: {
1171 subexpressions
[0]->print();
1174 foreach_list_typed (ast_node
, ast
, link
, &this->expressions
) {
1175 if (&ast
->link
!= this->expressions
.get_head())
1185 case ast_identifier
:
1186 printf("%s ", primary_expression
.identifier
);
1189 case ast_int_constant
:
1190 printf("%d ", primary_expression
.int_constant
);
1193 case ast_uint_constant
:
1194 printf("%u ", primary_expression
.uint_constant
);
1197 case ast_float_constant
:
1198 printf("%f ", primary_expression
.float_constant
);
1201 case ast_double_constant
:
1202 printf("%f ", primary_expression
.double_constant
);
1205 case ast_bool_constant
:
1207 primary_expression
.bool_constant
1208 ? "true" : "false");
1211 case ast_sequence
: {
1213 foreach_list_typed (ast_node
, ast
, link
, & this->expressions
) {
1214 if (&ast
->link
!= this->expressions
.get_head())
1223 case ast_aggregate
: {
1225 foreach_list_typed (ast_node
, ast
, link
, & this->expressions
) {
1226 if (&ast
->link
!= this->expressions
.get_head())
1241 ast_expression::ast_expression(int oper
,
1242 ast_expression
*ex0
,
1243 ast_expression
*ex1
,
1244 ast_expression
*ex2
) :
1245 primary_expression()
1247 this->oper
= ast_operators(oper
);
1248 this->subexpressions
[0] = ex0
;
1249 this->subexpressions
[1] = ex1
;
1250 this->subexpressions
[2] = ex2
;
1251 this->non_lvalue_description
= NULL
;
1252 this->is_lhs
= false;
1257 ast_expression_statement::print(void) const
1260 expression
->print();
1266 ast_expression_statement::ast_expression_statement(ast_expression
*ex
) :
1274 ast_function::print(void) const
1276 return_type
->print();
1277 printf(" %s (", identifier
);
1279 foreach_list_typed(ast_node
, ast
, link
, & this->parameters
) {
1287 ast_function::ast_function(void)
1288 : return_type(NULL
), identifier(NULL
), is_definition(false),
1296 ast_fully_specified_type::print(void) const
1298 _mesa_ast_type_qualifier_print(& qualifier
);
1304 ast_parameter_declarator::print(void) const
1308 printf("%s ", identifier
);
1309 ast_opt_array_dimensions_print(array_specifier
);
1314 ast_function_definition::print(void) const
1322 ast_declaration::print(void) const
1324 printf("%s ", identifier
);
1325 ast_opt_array_dimensions_print(array_specifier
);
1329 initializer
->print();
1334 ast_declaration::ast_declaration(const char *identifier
,
1335 ast_array_specifier
*array_specifier
,
1336 ast_expression
*initializer
)
1338 this->identifier
= identifier
;
1339 this->array_specifier
= array_specifier
;
1340 this->initializer
= initializer
;
1345 ast_declarator_list::print(void) const
1347 assert(type
|| invariant
);
1352 printf("invariant ");
1356 foreach_list_typed (ast_node
, ast
, link
, & this->declarations
) {
1357 if (&ast
->link
!= this->declarations
.get_head())
1367 ast_declarator_list::ast_declarator_list(ast_fully_specified_type
*type
)
1370 this->invariant
= false;
1371 this->precise
= false;
1375 ast_jump_statement::print(void) const
1379 printf("continue; ");
1386 if (opt_return_value
)
1387 opt_return_value
->print();
1392 printf("discard; ");
1398 ast_jump_statement::ast_jump_statement(int mode
, ast_expression
*return_value
)
1399 : opt_return_value(NULL
)
1401 this->mode
= ast_jump_modes(mode
);
1403 if (mode
== ast_return
)
1404 opt_return_value
= return_value
;
1409 ast_selection_statement::print(void) const
1415 then_statement
->print();
1417 if (else_statement
) {
1419 else_statement
->print();
1424 ast_selection_statement::ast_selection_statement(ast_expression
*condition
,
1425 ast_node
*then_statement
,
1426 ast_node
*else_statement
)
1428 this->condition
= condition
;
1429 this->then_statement
= then_statement
;
1430 this->else_statement
= else_statement
;
1435 ast_switch_statement::print(void) const
1437 printf("switch ( ");
1438 test_expression
->print();
1445 ast_switch_statement::ast_switch_statement(ast_expression
*test_expression
,
1448 this->test_expression
= test_expression
;
1454 ast_switch_body::print(void) const
1457 if (stmts
!= NULL
) {
1464 ast_switch_body::ast_switch_body(ast_case_statement_list
*stmts
)
1466 this->stmts
= stmts
;
1470 void ast_case_label::print(void) const
1472 if (test_value
!= NULL
) {
1474 test_value
->print();
1477 printf("default: ");
1482 ast_case_label::ast_case_label(ast_expression
*test_value
)
1484 this->test_value
= test_value
;
1488 void ast_case_label_list::print(void) const
1490 foreach_list_typed(ast_node
, ast
, link
, & this->labels
) {
1497 ast_case_label_list::ast_case_label_list(void)
1502 void ast_case_statement::print(void) const
1505 foreach_list_typed(ast_node
, ast
, link
, & this->stmts
) {
1512 ast_case_statement::ast_case_statement(ast_case_label_list
*labels
)
1514 this->labels
= labels
;
1518 void ast_case_statement_list::print(void) const
1520 foreach_list_typed(ast_node
, ast
, link
, & this->cases
) {
1526 ast_case_statement_list::ast_case_statement_list(void)
1532 ast_iteration_statement::print(void) const
1538 init_statement
->print();
1545 if (rest_expression
)
1546 rest_expression
->print();
1572 ast_iteration_statement::ast_iteration_statement(int mode
,
1574 ast_node
*condition
,
1575 ast_expression
*rest_expression
,
1578 this->mode
= ast_iteration_modes(mode
);
1579 this->init_statement
= init
;
1580 this->condition
= condition
;
1581 this->rest_expression
= rest_expression
;
1587 ast_struct_specifier::print(void) const
1589 printf("struct %s { ", name
);
1590 foreach_list_typed(ast_node
, ast
, link
, &this->declarations
) {
1597 ast_struct_specifier::ast_struct_specifier(const char *identifier
,
1598 ast_declarator_list
*declarator_list
)
1600 if (identifier
== NULL
) {
1601 static mtx_t mutex
= _MTX_INITIALIZER_NP
;
1602 static unsigned anon_count
= 1;
1606 count
= anon_count
++;
1609 identifier
= ralloc_asprintf(this, "#anon_struct_%04x", count
);
1612 this->declarations
.push_degenerate_list_at_head(&declarator_list
->link
);
1613 is_declaration
= true;
1617 void ast_subroutine_list::print(void) const
1619 foreach_list_typed (ast_node
, ast
, link
, & this->declarations
) {
1620 if (&ast
->link
!= this->declarations
.get_head())
1627 set_shader_inout_layout(struct gl_shader
*shader
,
1628 struct _mesa_glsl_parse_state
*state
)
1630 /* Should have been prevented by the parser. */
1631 if (shader
->Stage
== MESA_SHADER_TESS_CTRL
||
1632 shader
->Stage
== MESA_SHADER_VERTEX
) {
1633 assert(!state
->in_qualifier
->flags
.i
);
1634 } else if (shader
->Stage
!= MESA_SHADER_GEOMETRY
&&
1635 shader
->Stage
!= MESA_SHADER_TESS_EVAL
) {
1636 assert(!state
->in_qualifier
->flags
.i
);
1639 if (shader
->Stage
!= MESA_SHADER_COMPUTE
) {
1640 /* Should have been prevented by the parser. */
1641 assert(!state
->cs_input_local_size_specified
);
1644 if (shader
->Stage
!= MESA_SHADER_FRAGMENT
) {
1645 /* Should have been prevented by the parser. */
1646 assert(!state
->fs_uses_gl_fragcoord
);
1647 assert(!state
->fs_redeclares_gl_fragcoord
);
1648 assert(!state
->fs_pixel_center_integer
);
1649 assert(!state
->fs_origin_upper_left
);
1650 assert(!state
->fs_early_fragment_tests
);
1653 for (unsigned i
= 0; i
< MAX_FEEDBACK_BUFFERS
; i
++) {
1654 if (state
->out_qualifier
->out_xfb_stride
[i
]) {
1655 unsigned xfb_stride
;
1656 if (state
->out_qualifier
->out_xfb_stride
[i
]->
1657 process_qualifier_constant(state
, "xfb_stride", &xfb_stride
,
1659 shader
->info
.TransformFeedback
.BufferStride
[i
] = xfb_stride
;
1664 switch (shader
->Stage
) {
1665 case MESA_SHADER_TESS_CTRL
:
1666 shader
->info
.TessCtrl
.VerticesOut
= 0;
1667 if (state
->tcs_output_vertices_specified
) {
1669 if (state
->out_qualifier
->vertices
->
1670 process_qualifier_constant(state
, "vertices", &vertices
,
1673 YYLTYPE loc
= state
->out_qualifier
->vertices
->get_location();
1674 if (vertices
> state
->Const
.MaxPatchVertices
) {
1675 _mesa_glsl_error(&loc
, state
, "vertices (%d) exceeds "
1676 "GL_MAX_PATCH_VERTICES", vertices
);
1678 shader
->info
.TessCtrl
.VerticesOut
= vertices
;
1682 case MESA_SHADER_TESS_EVAL
:
1683 shader
->info
.TessEval
.PrimitiveMode
= PRIM_UNKNOWN
;
1684 if (state
->in_qualifier
->flags
.q
.prim_type
)
1685 shader
->info
.TessEval
.PrimitiveMode
= state
->in_qualifier
->prim_type
;
1687 shader
->info
.TessEval
.Spacing
= 0;
1688 if (state
->in_qualifier
->flags
.q
.vertex_spacing
)
1689 shader
->info
.TessEval
.Spacing
= state
->in_qualifier
->vertex_spacing
;
1691 shader
->info
.TessEval
.VertexOrder
= 0;
1692 if (state
->in_qualifier
->flags
.q
.ordering
)
1693 shader
->info
.TessEval
.VertexOrder
= state
->in_qualifier
->ordering
;
1695 shader
->info
.TessEval
.PointMode
= -1;
1696 if (state
->in_qualifier
->flags
.q
.point_mode
)
1697 shader
->info
.TessEval
.PointMode
= state
->in_qualifier
->point_mode
;
1699 case MESA_SHADER_GEOMETRY
:
1700 shader
->info
.Geom
.VerticesOut
= -1;
1701 if (state
->out_qualifier
->flags
.q
.max_vertices
) {
1702 unsigned qual_max_vertices
;
1703 if (state
->out_qualifier
->max_vertices
->
1704 process_qualifier_constant(state
, "max_vertices",
1705 &qual_max_vertices
, true, true)) {
1707 if (qual_max_vertices
> state
->Const
.MaxGeometryOutputVertices
) {
1708 YYLTYPE loc
= state
->out_qualifier
->max_vertices
->get_location();
1709 _mesa_glsl_error(&loc
, state
,
1710 "maximum output vertices (%d) exceeds "
1711 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1714 shader
->info
.Geom
.VerticesOut
= qual_max_vertices
;
1718 if (state
->gs_input_prim_type_specified
) {
1719 shader
->info
.Geom
.InputType
= state
->in_qualifier
->prim_type
;
1721 shader
->info
.Geom
.InputType
= PRIM_UNKNOWN
;
1724 if (state
->out_qualifier
->flags
.q
.prim_type
) {
1725 shader
->info
.Geom
.OutputType
= state
->out_qualifier
->prim_type
;
1727 shader
->info
.Geom
.OutputType
= PRIM_UNKNOWN
;
1730 shader
->info
.Geom
.Invocations
= 0;
1731 if (state
->in_qualifier
->flags
.q
.invocations
) {
1732 unsigned invocations
;
1733 if (state
->in_qualifier
->invocations
->
1734 process_qualifier_constant(state
, "invocations",
1735 &invocations
, false)) {
1737 YYLTYPE loc
= state
->in_qualifier
->invocations
->get_location();
1738 if (invocations
> MAX_GEOMETRY_SHADER_INVOCATIONS
) {
1739 _mesa_glsl_error(&loc
, state
,
1740 "invocations (%d) exceeds "
1741 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1744 shader
->info
.Geom
.Invocations
= invocations
;
1749 case MESA_SHADER_COMPUTE
:
1750 if (state
->cs_input_local_size_specified
) {
1751 for (int i
= 0; i
< 3; i
++)
1752 shader
->info
.Comp
.LocalSize
[i
] = state
->cs_input_local_size
[i
];
1754 for (int i
= 0; i
< 3; i
++)
1755 shader
->info
.Comp
.LocalSize
[i
] = 0;
1759 case MESA_SHADER_FRAGMENT
:
1760 shader
->info
.redeclares_gl_fragcoord
=
1761 state
->fs_redeclares_gl_fragcoord
;
1762 shader
->info
.uses_gl_fragcoord
= state
->fs_uses_gl_fragcoord
;
1763 shader
->info
.pixel_center_integer
= state
->fs_pixel_center_integer
;
1764 shader
->info
.origin_upper_left
= state
->fs_origin_upper_left
;
1765 shader
->info
.ARB_fragment_coord_conventions_enable
=
1766 state
->ARB_fragment_coord_conventions_enable
;
1767 shader
->info
.EarlyFragmentTests
= state
->fs_early_fragment_tests
;
1771 /* Nothing to do. */
1779 assign_subroutine_indexes(struct gl_shader
*sh
,
1780 struct _mesa_glsl_parse_state
*state
)
1785 for (j
= 0; j
< state
->num_subroutines
; j
++) {
1786 while (state
->subroutines
[j
]->subroutine_index
== -1) {
1787 for (k
= 0; k
< state
->num_subroutines
; k
++) {
1788 if (state
->subroutines
[k
]->subroutine_index
== index
)
1790 else if (k
== state
->num_subroutines
- 1) {
1791 state
->subroutines
[j
]->subroutine_index
= index
;
1800 add_builtin_defines(struct _mesa_glsl_parse_state
*state
,
1801 void (*add_builtin_define
)(struct glcpp_parser
*, const char *, int),
1802 struct glcpp_parser
*data
,
1806 unsigned gl_version
= state
->ctx
->Extensions
.Version
;
1807 gl_api api
= state
->ctx
->API
;
1809 if (gl_version
!= 0xff) {
1811 for (i
= 0; i
< state
->num_supported_versions
; i
++) {
1812 if (state
->supported_versions
[i
].ver
== version
&&
1813 state
->supported_versions
[i
].es
== es
) {
1814 gl_version
= state
->supported_versions
[i
].gl_ver
;
1819 if (i
== state
->num_supported_versions
)
1824 api
= API_OPENGLES2
;
1826 for (unsigned i
= 0;
1827 i
< ARRAY_SIZE(_mesa_glsl_supported_extensions
); ++i
) {
1828 const _mesa_glsl_extension
*extension
1829 = &_mesa_glsl_supported_extensions
[i
];
1830 if (extension
->compatible_with_state(state
, api
, gl_version
)) {
1831 add_builtin_define(data
, extension
->name
, 1);
1837 _mesa_glsl_compile_shader(struct gl_context
*ctx
, struct gl_shader
*shader
,
1838 bool dump_ast
, bool dump_hir
)
1840 struct _mesa_glsl_parse_state
*state
=
1841 new(shader
) _mesa_glsl_parse_state(ctx
, shader
->Stage
, shader
);
1842 const char *source
= shader
->Source
;
1844 if (ctx
->Const
.GenerateTemporaryNames
)
1845 (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names
,
1848 state
->error
= glcpp_preprocess(state
, &source
, &state
->info_log
,
1849 add_builtin_defines
, state
, ctx
);
1851 if (!state
->error
) {
1852 _mesa_glsl_lexer_ctor(state
, source
);
1853 _mesa_glsl_parse(state
);
1854 _mesa_glsl_lexer_dtor(state
);
1858 foreach_list_typed(ast_node
, ast
, link
, &state
->translation_unit
) {
1864 ralloc_free(shader
->ir
);
1865 shader
->ir
= new(shader
) exec_list
;
1866 if (!state
->error
&& !state
->translation_unit
.is_empty())
1867 _mesa_ast_to_hir(shader
->ir
, state
);
1869 if (!state
->error
) {
1870 validate_ir_tree(shader
->ir
);
1872 /* Print out the unoptimized IR. */
1874 _mesa_print_ir(stdout
, shader
->ir
, state
);
1879 if (!state
->error
&& !shader
->ir
->is_empty()) {
1880 struct gl_shader_compiler_options
*options
=
1881 &ctx
->Const
.ShaderCompilerOptions
[shader
->Stage
];
1883 assign_subroutine_indexes(shader
, state
);
1884 lower_subroutine(shader
->ir
, state
);
1885 /* Do some optimization at compile time to reduce shader IR size
1886 * and reduce later work if the same shader is linked multiple times
1888 while (do_common_optimization(shader
->ir
, false, false, options
,
1889 ctx
->Const
.NativeIntegers
))
1892 validate_ir_tree(shader
->ir
);
1894 enum ir_variable_mode other
;
1895 switch (shader
->Stage
) {
1896 case MESA_SHADER_VERTEX
:
1897 other
= ir_var_shader_in
;
1899 case MESA_SHADER_FRAGMENT
:
1900 other
= ir_var_shader_out
;
1903 /* Something invalid to ensure optimize_dead_builtin_uniforms
1904 * doesn't remove anything other than uniforms or constants.
1906 other
= ir_var_mode_count
;
1910 optimize_dead_builtin_variables(shader
->ir
, other
);
1912 validate_ir_tree(shader
->ir
);
1915 if (shader
->InfoLog
)
1916 ralloc_free(shader
->InfoLog
);
1919 set_shader_inout_layout(shader
, state
);
1921 shader
->symbols
= new(shader
->ir
) glsl_symbol_table
;
1922 shader
->CompileStatus
= !state
->error
;
1923 shader
->InfoLog
= state
->info_log
;
1924 shader
->Version
= state
->language_version
;
1925 shader
->IsES
= state
->es_shader
;
1926 shader
->info
.uses_builtin_functions
= state
->uses_builtin_functions
;
1928 /* Retain any live IR, but trash the rest. */
1929 reparent_ir(shader
->ir
, shader
->ir
);
1931 /* Destroy the symbol table. Create a new symbol table that contains only
1932 * the variables and functions that still exist in the IR. The symbol
1933 * table will be used later during linking.
1935 * There must NOT be any freed objects still referenced by the symbol
1936 * table. That could cause the linker to dereference freed memory.
1938 * We don't have to worry about types or interface-types here because those
1939 * are fly-weights that are looked up by glsl_type.
1941 foreach_in_list (ir_instruction
, ir
, shader
->ir
) {
1942 switch (ir
->ir_type
) {
1943 case ir_type_function
:
1944 shader
->symbols
->add_function((ir_function
*) ir
);
1946 case ir_type_variable
: {
1947 ir_variable
*const var
= (ir_variable
*) ir
;
1949 if (var
->data
.mode
!= ir_var_temporary
)
1950 shader
->symbols
->add_variable(var
);
1958 _mesa_glsl_initialize_derived_variables(ctx
, shader
);
1960 delete state
->symbols
;
1966 * Do the set of common optimizations passes
1968 * \param ir List of instructions to be optimized
1969 * \param linked Is the shader linked? This enables
1970 * optimizations passes that remove code at
1971 * global scope and could cause linking to
1973 * \param uniform_locations_assigned Have locations already been assigned for
1974 * uniforms? This prevents the declarations
1975 * of unused uniforms from being removed.
1976 * The setting of this flag only matters if
1977 * \c linked is \c true.
1978 * \param max_unroll_iterations Maximum number of loop iterations to be
1979 * unrolled. Setting to 0 disables loop
1981 * \param options The driver's preferred shader options.
1984 do_common_optimization(exec_list
*ir
, bool linked
,
1985 bool uniform_locations_assigned
,
1986 const struct gl_shader_compiler_options
*options
,
1987 bool native_integers
)
1989 const bool debug
= false;
1990 GLboolean progress
= GL_FALSE
;
1992 #define OPT(PASS, ...) do { \
1994 fprintf(stderr, "START GLSL optimization %s\n", #PASS); \
1995 const bool opt_progress = PASS(__VA_ARGS__); \
1996 progress = opt_progress || progress; \
1998 _mesa_print_ir(stderr, ir, NULL); \
1999 fprintf(stderr, "GLSL optimization %s: %s progress\n", \
2000 #PASS, opt_progress ? "made" : "no"); \
2002 progress = PASS(__VA_ARGS__) || progress; \
2006 OPT(lower_instructions
, ir
, SUB_TO_ADD_NEG
);
2009 OPT(do_function_inlining
, ir
);
2010 OPT(do_dead_functions
, ir
);
2011 OPT(do_structure_splitting
, ir
);
2013 propagate_invariance(ir
);
2014 OPT(do_if_simplification
, ir
);
2015 OPT(opt_flatten_nested_if_blocks
, ir
);
2016 OPT(opt_conditional_discard
, ir
);
2017 OPT(do_copy_propagation
, ir
);
2018 OPT(do_copy_propagation_elements
, ir
);
2020 if (options
->OptimizeForAOS
&& !linked
)
2021 OPT(opt_flip_matrices
, ir
);
2023 if (linked
&& options
->OptimizeForAOS
) {
2024 OPT(do_vectorize
, ir
);
2028 OPT(do_dead_code
, ir
, uniform_locations_assigned
);
2030 OPT(do_dead_code_unlinked
, ir
);
2031 OPT(do_dead_code_local
, ir
);
2032 OPT(do_tree_grafting
, ir
);
2033 OPT(do_constant_propagation
, ir
);
2035 OPT(do_constant_variable
, ir
);
2037 OPT(do_constant_variable_unlinked
, ir
);
2038 OPT(do_constant_folding
, ir
);
2039 OPT(do_minmax_prune
, ir
);
2040 OPT(do_rebalance_tree
, ir
);
2041 OPT(do_algebraic
, ir
, native_integers
, options
);
2042 OPT(do_lower_jumps
, ir
);
2043 OPT(do_vec_index_to_swizzle
, ir
);
2044 OPT(lower_vector_insert
, ir
, false);
2045 OPT(do_swizzle_swizzle
, ir
);
2046 OPT(do_noop_swizzle
, ir
);
2048 OPT(optimize_split_arrays
, ir
, linked
);
2049 OPT(optimize_redundant_jumps
, ir
);
2051 loop_state
*ls
= analyze_loop_variables(ir
);
2052 if (ls
->loop_found
) {
2053 OPT(set_loop_controls
, ir
, ls
);
2054 OPT(unroll_loops
, ir
, ls
, options
);
2066 * To be called at GL teardown time, this frees compiler datastructures.
2068 * After calling this, any previously compiled shaders and shader
2069 * programs would be invalid. So this should happen at approximately
2073 _mesa_destroy_shader_compiler(void)
2075 _mesa_destroy_shader_compiler_caches();
2077 _mesa_glsl_release_types();
2081 * Releases compiler caches to trade off performance for memory.
2083 * Intended to be used with glReleaseShaderCompiler().
2086 _mesa_destroy_shader_compiler_caches(void)
2088 _mesa_glsl_release_builtin_functions();