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
= 110;
77 this->forced_language_version
= ctx
->Const
.ForceGLSLVersion
;
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->ARB_compute_shader_enable
= true;
92 this->Const
.MaxLights
= ctx
->Const
.MaxLights
;
93 this->Const
.MaxClipPlanes
= ctx
->Const
.MaxClipPlanes
;
94 this->Const
.MaxTextureUnits
= ctx
->Const
.MaxTextureUnits
;
95 this->Const
.MaxTextureCoords
= ctx
->Const
.MaxTextureCoordUnits
;
96 this->Const
.MaxVertexAttribs
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAttribs
;
97 this->Const
.MaxVertexUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxUniformComponents
;
98 this->Const
.MaxVertexTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
;
99 this->Const
.MaxCombinedTextureImageUnits
= ctx
->Const
.MaxCombinedTextureImageUnits
;
100 this->Const
.MaxTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
;
101 this->Const
.MaxFragmentUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxUniformComponents
;
102 this->Const
.MinProgramTexelOffset
= ctx
->Const
.MinProgramTexelOffset
;
103 this->Const
.MaxProgramTexelOffset
= ctx
->Const
.MaxProgramTexelOffset
;
105 this->Const
.MaxDrawBuffers
= ctx
->Const
.MaxDrawBuffers
;
107 this->Const
.MaxDualSourceDrawBuffers
= ctx
->Const
.MaxDualSourceDrawBuffers
;
110 this->Const
.MaxVertexOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxOutputComponents
;
111 this->Const
.MaxGeometryInputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxInputComponents
;
112 this->Const
.MaxGeometryOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxOutputComponents
;
113 this->Const
.MaxFragmentInputComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxInputComponents
;
114 this->Const
.MaxGeometryTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
;
115 this->Const
.MaxGeometryOutputVertices
= ctx
->Const
.MaxGeometryOutputVertices
;
116 this->Const
.MaxGeometryTotalOutputComponents
= ctx
->Const
.MaxGeometryTotalOutputComponents
;
117 this->Const
.MaxGeometryUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxUniformComponents
;
119 this->Const
.MaxVertexAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicCounters
;
120 this->Const
.MaxTessControlAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxAtomicCounters
;
121 this->Const
.MaxTessEvaluationAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxAtomicCounters
;
122 this->Const
.MaxGeometryAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicCounters
;
123 this->Const
.MaxFragmentAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicCounters
;
124 this->Const
.MaxCombinedAtomicCounters
= ctx
->Const
.MaxCombinedAtomicCounters
;
125 this->Const
.MaxAtomicBufferBindings
= ctx
->Const
.MaxAtomicBufferBindings
;
126 this->Const
.MaxVertexAtomicCounterBuffers
=
127 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicBuffers
;
128 this->Const
.MaxTessControlAtomicCounterBuffers
=
129 ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxAtomicBuffers
;
130 this->Const
.MaxTessEvaluationAtomicCounterBuffers
=
131 ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxAtomicBuffers
;
132 this->Const
.MaxGeometryAtomicCounterBuffers
=
133 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicBuffers
;
134 this->Const
.MaxFragmentAtomicCounterBuffers
=
135 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicBuffers
;
136 this->Const
.MaxCombinedAtomicCounterBuffers
=
137 ctx
->Const
.MaxCombinedAtomicBuffers
;
138 this->Const
.MaxAtomicCounterBufferSize
=
139 ctx
->Const
.MaxAtomicBufferSize
;
141 /* Compute shader constants */
142 for (unsigned i
= 0; i
< ARRAY_SIZE(this->Const
.MaxComputeWorkGroupCount
); i
++)
143 this->Const
.MaxComputeWorkGroupCount
[i
] = ctx
->Const
.MaxComputeWorkGroupCount
[i
];
144 for (unsigned i
= 0; i
< ARRAY_SIZE(this->Const
.MaxComputeWorkGroupSize
); i
++)
145 this->Const
.MaxComputeWorkGroupSize
[i
] = ctx
->Const
.MaxComputeWorkGroupSize
[i
];
147 this->Const
.MaxImageUnits
= ctx
->Const
.MaxImageUnits
;
148 this->Const
.MaxCombinedShaderOutputResources
= ctx
->Const
.MaxCombinedShaderOutputResources
;
149 this->Const
.MaxImageSamples
= ctx
->Const
.MaxImageSamples
;
150 this->Const
.MaxVertexImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxImageUniforms
;
151 this->Const
.MaxTessControlImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxImageUniforms
;
152 this->Const
.MaxTessEvaluationImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxImageUniforms
;
153 this->Const
.MaxGeometryImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxImageUniforms
;
154 this->Const
.MaxFragmentImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxImageUniforms
;
155 this->Const
.MaxCombinedImageUniforms
= ctx
->Const
.MaxCombinedImageUniforms
;
157 /* ARB_viewport_array */
158 this->Const
.MaxViewports
= ctx
->Const
.MaxViewports
;
160 /* tessellation shader constants */
161 this->Const
.MaxPatchVertices
= ctx
->Const
.MaxPatchVertices
;
162 this->Const
.MaxTessGenLevel
= ctx
->Const
.MaxTessGenLevel
;
163 this->Const
.MaxTessControlInputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxInputComponents
;
164 this->Const
.MaxTessControlOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxOutputComponents
;
165 this->Const
.MaxTessControlTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxTextureImageUnits
;
166 this->Const
.MaxTessEvaluationInputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxInputComponents
;
167 this->Const
.MaxTessEvaluationOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxOutputComponents
;
168 this->Const
.MaxTessEvaluationTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxTextureImageUnits
;
169 this->Const
.MaxTessPatchComponents
= ctx
->Const
.MaxTessPatchComponents
;
170 this->Const
.MaxTessControlTotalOutputComponents
= ctx
->Const
.MaxTessControlTotalOutputComponents
;
171 this->Const
.MaxTessControlUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxUniformComponents
;
172 this->Const
.MaxTessEvaluationUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxUniformComponents
;
174 this->current_function
= NULL
;
175 this->toplevel_ir
= NULL
;
176 this->found_return
= false;
177 this->all_invariant
= false;
178 this->user_structures
= NULL
;
179 this->num_user_structures
= 0;
180 this->num_subroutines
= 0;
181 this->subroutines
= NULL
;
182 this->num_subroutine_types
= 0;
183 this->subroutine_types
= NULL
;
185 /* supported_versions should be large enough to support the known desktop
186 * GLSL versions plus 3 GLES versions (ES 1.00, ES 3.00, and ES 3.10))
188 STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions
) + 3) ==
189 ARRAY_SIZE(this->supported_versions
));
191 /* Populate the list of supported GLSL versions */
192 /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
193 * the OpenGL 3.2 Core context is supported, this logic will need
194 * change. Older versions of GLSL are no longer supported
195 * outside the compatibility contexts of 3.x.
197 this->num_supported_versions
= 0;
198 if (_mesa_is_desktop_gl(ctx
)) {
199 for (unsigned i
= 0; i
< ARRAY_SIZE(known_desktop_glsl_versions
); i
++) {
200 if (known_desktop_glsl_versions
[i
] <= ctx
->Const
.GLSLVersion
) {
201 this->supported_versions
[this->num_supported_versions
].ver
202 = known_desktop_glsl_versions
[i
];
203 this->supported_versions
[this->num_supported_versions
].es
= false;
204 this->num_supported_versions
++;
208 if (ctx
->API
== API_OPENGLES2
|| ctx
->Extensions
.ARB_ES2_compatibility
) {
209 this->supported_versions
[this->num_supported_versions
].ver
= 100;
210 this->supported_versions
[this->num_supported_versions
].es
= true;
211 this->num_supported_versions
++;
213 if (_mesa_is_gles3(ctx
) || ctx
->Extensions
.ARB_ES3_compatibility
) {
214 this->supported_versions
[this->num_supported_versions
].ver
= 300;
215 this->supported_versions
[this->num_supported_versions
].es
= true;
216 this->num_supported_versions
++;
218 if (_mesa_is_gles31(ctx
)) {
219 this->supported_versions
[this->num_supported_versions
].ver
= 310;
220 this->supported_versions
[this->num_supported_versions
].es
= true;
221 this->num_supported_versions
++;
224 /* Create a string for use in error messages to tell the user which GLSL
225 * versions are supported.
227 char *supported
= ralloc_strdup(this, "");
228 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
229 unsigned ver
= this->supported_versions
[i
].ver
;
230 const char *const prefix
= (i
== 0)
232 : ((i
== this->num_supported_versions
- 1) ? ", and " : ", ");
233 const char *const suffix
= (this->supported_versions
[i
].es
) ? " ES" : "";
235 ralloc_asprintf_append(& supported
, "%s%u.%02u%s",
237 ver
/ 100, ver
% 100,
241 this->supported_version_string
= supported
;
243 if (ctx
->Const
.ForceGLSLExtensionsWarn
)
244 _mesa_glsl_process_extension("all", NULL
, "warn", NULL
, this);
246 this->default_uniform_qualifier
= new(this) ast_type_qualifier();
247 this->default_uniform_qualifier
->flags
.q
.shared
= 1;
248 this->default_uniform_qualifier
->flags
.q
.column_major
= 1;
249 this->default_uniform_qualifier
->is_default_qualifier
= true;
251 this->default_shader_storage_qualifier
= new(this) ast_type_qualifier();
252 this->default_shader_storage_qualifier
->flags
.q
.shared
= 1;
253 this->default_shader_storage_qualifier
->flags
.q
.column_major
= 1;
254 this->default_shader_storage_qualifier
->is_default_qualifier
= true;
256 this->fs_uses_gl_fragcoord
= false;
257 this->fs_redeclares_gl_fragcoord
= false;
258 this->fs_origin_upper_left
= false;
259 this->fs_pixel_center_integer
= false;
260 this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers
= false;
262 this->gs_input_prim_type_specified
= false;
263 this->tcs_output_vertices_specified
= false;
264 this->gs_input_size
= 0;
265 this->in_qualifier
= new(this) ast_type_qualifier();
266 this->out_qualifier
= new(this) ast_type_qualifier();
267 this->fs_early_fragment_tests
= false;
268 memset(this->atomic_counter_offsets
, 0,
269 sizeof(this->atomic_counter_offsets
));
270 this->allow_extension_directive_midshader
=
271 ctx
->Const
.AllowGLSLExtensionDirectiveMidShader
;
275 * Determine whether the current GLSL version is sufficiently high to support
276 * a certain feature, and generate an error message if it isn't.
278 * \param required_glsl_version and \c required_glsl_es_version are
279 * interpreted as they are in _mesa_glsl_parse_state::is_version().
281 * \param locp is the parser location where the error should be reported.
283 * \param fmt (and additional arguments) constitute a printf-style error
284 * message to report if the version check fails. Information about the
285 * current and required GLSL versions will be appended. So, for example, if
286 * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
287 * "foo unsupported") is called, the error message will be "foo unsupported in
288 * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
291 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version
,
292 unsigned required_glsl_es_version
,
293 YYLTYPE
*locp
, const char *fmt
, ...)
295 if (this->is_version(required_glsl_version
, required_glsl_es_version
))
300 char *problem
= ralloc_vasprintf(this, fmt
, args
);
302 const char *glsl_version_string
303 = glsl_compute_version_string(this, false, required_glsl_version
);
304 const char *glsl_es_version_string
305 = glsl_compute_version_string(this, true, required_glsl_es_version
);
306 const char *requirement_string
= "";
307 if (required_glsl_version
&& required_glsl_es_version
) {
308 requirement_string
= ralloc_asprintf(this, " (%s or %s required)",
310 glsl_es_version_string
);
311 } else if (required_glsl_version
) {
312 requirement_string
= ralloc_asprintf(this, " (%s required)",
313 glsl_version_string
);
314 } else if (required_glsl_es_version
) {
315 requirement_string
= ralloc_asprintf(this, " (%s required)",
316 glsl_es_version_string
);
318 _mesa_glsl_error(locp
, this, "%s in %s%s",
319 problem
, this->get_version_string(),
326 * Process a GLSL #version directive.
328 * \param version is the integer that follows the #version token.
330 * \param ident is a string identifier that follows the integer, if any is
331 * present. Otherwise NULL.
334 _mesa_glsl_parse_state::process_version_directive(YYLTYPE
*locp
, int version
,
337 bool es_token_present
= false;
339 if (strcmp(ident
, "es") == 0) {
340 es_token_present
= true;
341 } else if (version
>= 150) {
342 if (strcmp(ident
, "core") == 0) {
343 /* Accept the token. There's no need to record that this is
344 * a core profile shader since that's the only profile we support.
346 } else if (strcmp(ident
, "compatibility") == 0) {
347 _mesa_glsl_error(locp
, this,
348 "the compatibility profile is not supported");
350 _mesa_glsl_error(locp
, this,
351 "\"%s\" is not a valid shading language profile; "
352 "if present, it must be \"core\"", ident
);
355 _mesa_glsl_error(locp
, this,
356 "illegal text following version number");
360 this->es_shader
= es_token_present
;
361 if (version
== 100) {
362 if (es_token_present
) {
363 _mesa_glsl_error(locp
, this,
364 "GLSL 1.00 ES should be selected using "
367 this->es_shader
= true;
371 if (this->es_shader
) {
372 this->ARB_texture_rectangle_enable
= false;
375 if (this->forced_language_version
)
376 this->language_version
= this->forced_language_version
;
378 this->language_version
= version
;
380 bool supported
= false;
381 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
382 if (this->supported_versions
[i
].ver
== this->language_version
383 && this->supported_versions
[i
].es
== this->es_shader
) {
390 _mesa_glsl_error(locp
, this, "%s is not supported. "
391 "Supported versions are: %s",
392 this->get_version_string(),
393 this->supported_version_string
);
395 /* On exit, the language_version must be set to a valid value.
396 * Later calls to _mesa_glsl_initialize_types will misbehave if
397 * the version is invalid.
399 switch (this->ctx
->API
) {
400 case API_OPENGL_COMPAT
:
401 case API_OPENGL_CORE
:
402 this->language_version
= this->ctx
->Const
.GLSLVersion
;
406 assert(!"Should not get here.");
410 this->language_version
= 100;
417 /* This helper function will append the given message to the shader's
418 info log and report it via GL_ARB_debug_output. Per that extension,
419 'type' is one of the enum values classifying the message, and
420 'id' is the implementation-defined ID of the given message. */
422 _mesa_glsl_msg(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
423 GLenum type
, const char *fmt
, va_list ap
)
425 bool error
= (type
== MESA_DEBUG_TYPE_ERROR
);
428 assert(state
->info_log
!= NULL
);
430 /* Get the offset that the new message will be written to. */
431 int msg_offset
= strlen(state
->info_log
);
433 ralloc_asprintf_append(&state
->info_log
, "%u:%u(%u): %s: ",
437 error
? "error" : "warning");
438 ralloc_vasprintf_append(&state
->info_log
, fmt
, ap
);
440 const char *const msg
= &state
->info_log
[msg_offset
];
441 struct gl_context
*ctx
= state
->ctx
;
443 /* Report the error via GL_ARB_debug_output. */
444 _mesa_shader_debug(ctx
, type
, &msg_id
, msg
);
446 ralloc_strcat(&state
->info_log
, "\n");
450 _mesa_glsl_error(YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
451 const char *fmt
, ...)
458 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_ERROR
, fmt
, ap
);
464 _mesa_glsl_warning(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
465 const char *fmt
, ...)
470 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_OTHER
, fmt
, ap
);
476 * Enum representing the possible behaviors that can be specified in
477 * an #extension directive.
487 * Element type for _mesa_glsl_supported_extensions
489 struct _mesa_glsl_extension
{
491 * Name of the extension when referred to in a GLSL extension
496 /** True if this extension is available to desktop GL shaders */
499 /** True if this extension is available to GLES shaders */
503 * Flag in the gl_extensions struct indicating whether this
504 * extension is supported by the driver, or
505 * &gl_extensions::dummy_true if supported by all drivers.
507 * Note: the type (GLboolean gl_extensions::*) is a "pointer to
508 * member" type, the type-safe alternative to the "offsetof" macro.
511 * - foo bar::* p declares p to be an "offset" to a field of type
512 * foo that exists within struct bar
513 * - &bar::baz computes the "offset" of field baz within struct bar
514 * - x.*p accesses the field of x that exists at "offset" p
515 * - x->*p is equivalent to (*x).*p
517 const GLboolean
gl_extensions::* supported_flag
;
520 * Flag in the _mesa_glsl_parse_state struct that should be set
521 * when this extension is enabled.
523 * See note in _mesa_glsl_extension::supported_flag about "pointer
526 bool _mesa_glsl_parse_state::* enable_flag
;
529 * Flag in the _mesa_glsl_parse_state struct that should be set
530 * when the shader requests "warn" behavior for this extension.
532 * See note in _mesa_glsl_extension::supported_flag about "pointer
535 bool _mesa_glsl_parse_state::* warn_flag
;
538 bool compatible_with_state(const _mesa_glsl_parse_state
*state
) const;
539 void set_flags(_mesa_glsl_parse_state
*state
, ext_behavior behavior
) const;
542 #define EXT(NAME, GL, ES, SUPPORTED_FLAG) \
543 { "GL_" #NAME, GL, ES, &gl_extensions::SUPPORTED_FLAG, \
544 &_mesa_glsl_parse_state::NAME##_enable, \
545 &_mesa_glsl_parse_state::NAME##_warn }
548 * Table of extensions that can be enabled/disabled within a shader,
549 * and the conditions under which they are supported.
551 static const _mesa_glsl_extension _mesa_glsl_supported_extensions
[] = {
552 /* API availability */
553 /* name GL ES supported flag */
555 /* ARB extensions go here, sorted alphabetically.
557 EXT(ARB_arrays_of_arrays
, true, false, ARB_arrays_of_arrays
),
558 EXT(ARB_compute_shader
, true, false, ARB_compute_shader
),
559 EXT(ARB_conservative_depth
, true, false, ARB_conservative_depth
),
560 EXT(ARB_derivative_control
, true, false, ARB_derivative_control
),
561 EXT(ARB_draw_buffers
, true, false, dummy_true
),
562 EXT(ARB_draw_instanced
, true, false, ARB_draw_instanced
),
563 EXT(ARB_enhanced_layouts
, true, false, ARB_enhanced_layouts
),
564 EXT(ARB_explicit_attrib_location
, true, false, ARB_explicit_attrib_location
),
565 EXT(ARB_explicit_uniform_location
, true, false, ARB_explicit_uniform_location
),
566 EXT(ARB_fragment_coord_conventions
, true, false, ARB_fragment_coord_conventions
),
567 EXT(ARB_fragment_layer_viewport
, true, false, ARB_fragment_layer_viewport
),
568 EXT(ARB_gpu_shader5
, true, false, ARB_gpu_shader5
),
569 EXT(ARB_gpu_shader_fp64
, true, false, ARB_gpu_shader_fp64
),
570 EXT(ARB_sample_shading
, true, false, ARB_sample_shading
),
571 EXT(ARB_separate_shader_objects
, true, false, dummy_true
),
572 EXT(ARB_shader_atomic_counters
, true, false, ARB_shader_atomic_counters
),
573 EXT(ARB_shader_bit_encoding
, true, false, ARB_shader_bit_encoding
),
574 EXT(ARB_shader_clock
, true, false, ARB_shader_clock
),
575 EXT(ARB_shader_draw_parameters
, true, false, ARB_shader_draw_parameters
),
576 EXT(ARB_shader_image_load_store
, true, false, ARB_shader_image_load_store
),
577 EXT(ARB_shader_image_size
, true, false, ARB_shader_image_size
),
578 EXT(ARB_shader_precision
, true, false, ARB_shader_precision
),
579 EXT(ARB_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
580 EXT(ARB_shader_storage_buffer_object
, true, true, ARB_shader_storage_buffer_object
),
581 EXT(ARB_shader_subroutine
, true, false, ARB_shader_subroutine
),
582 EXT(ARB_shader_texture_image_samples
, true, false, ARB_shader_texture_image_samples
),
583 EXT(ARB_shader_texture_lod
, true, false, ARB_shader_texture_lod
),
584 EXT(ARB_shading_language_420pack
, true, false, ARB_shading_language_420pack
),
585 EXT(ARB_shading_language_packing
, true, false, ARB_shading_language_packing
),
586 EXT(ARB_tessellation_shader
, true, false, ARB_tessellation_shader
),
587 EXT(ARB_texture_cube_map_array
, true, false, ARB_texture_cube_map_array
),
588 EXT(ARB_texture_gather
, true, false, ARB_texture_gather
),
589 EXT(ARB_texture_multisample
, true, false, ARB_texture_multisample
),
590 EXT(ARB_texture_query_levels
, true, false, ARB_texture_query_levels
),
591 EXT(ARB_texture_query_lod
, true, false, ARB_texture_query_lod
),
592 EXT(ARB_texture_rectangle
, true, false, dummy_true
),
593 EXT(ARB_uniform_buffer_object
, true, false, ARB_uniform_buffer_object
),
594 EXT(ARB_vertex_attrib_64bit
, true, false, ARB_vertex_attrib_64bit
),
595 EXT(ARB_viewport_array
, true, false, ARB_viewport_array
),
597 /* KHR extensions go here, sorted alphabetically.
600 /* OES extensions go here, sorted alphabetically.
602 EXT(OES_EGL_image_external
, false, true, OES_EGL_image_external
),
603 EXT(OES_geometry_shader
, false, true, OES_geometry_shader
),
604 EXT(OES_standard_derivatives
, false, true, OES_standard_derivatives
),
605 EXT(OES_texture_3D
, false, true, dummy_true
),
606 EXT(OES_texture_storage_multisample_2d_array
, false, true, ARB_texture_multisample
),
608 /* All other extensions go here, sorted alphabetically.
610 EXT(AMD_conservative_depth
, true, false, ARB_conservative_depth
),
611 EXT(AMD_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
612 EXT(AMD_shader_trinary_minmax
, true, false, dummy_true
),
613 EXT(AMD_vertex_shader_layer
, true, false, AMD_vertex_shader_layer
),
614 EXT(AMD_vertex_shader_viewport_index
, true, false, AMD_vertex_shader_viewport_index
),
615 EXT(EXT_blend_func_extended
, false, true, ARB_blend_func_extended
),
616 EXT(EXT_draw_buffers
, false, true, dummy_true
),
617 EXT(EXT_separate_shader_objects
, false, true, dummy_true
),
618 EXT(EXT_shader_integer_mix
, true, true, EXT_shader_integer_mix
),
619 EXT(EXT_shader_samples_identical
, true, true, EXT_shader_samples_identical
),
620 EXT(EXT_texture_array
, true, false, EXT_texture_array
),
627 * Determine whether a given extension is compatible with the target,
628 * API, and extension information in the current parser state.
630 bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state
*
633 /* Check that this extension matches whether we are compiling
634 * for desktop GL or GLES.
636 if (state
->es_shader
) {
637 if (!this->avail_in_ES
) return false;
639 if (!this->avail_in_GL
) return false;
642 /* Check that this extension is supported by the OpenGL
645 * Note: the ->* operator indexes into state->extensions by the
646 * offset this->supported_flag. See
647 * _mesa_glsl_extension::supported_flag for more info.
649 return state
->extensions
->*(this->supported_flag
);
653 * Set the appropriate flags in the parser state to establish the
654 * given behavior for this extension.
656 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state
*state
,
657 ext_behavior behavior
) const
659 /* Note: the ->* operator indexes into state by the
660 * offsets this->enable_flag and this->warn_flag. See
661 * _mesa_glsl_extension::supported_flag for more info.
663 state
->*(this->enable_flag
) = (behavior
!= extension_disable
);
664 state
->*(this->warn_flag
) = (behavior
== extension_warn
);
668 * Find an extension by name in _mesa_glsl_supported_extensions. If
669 * the name is not found, return NULL.
671 static const _mesa_glsl_extension
*find_extension(const char *name
)
673 for (unsigned i
= 0; i
< ARRAY_SIZE(_mesa_glsl_supported_extensions
); ++i
) {
674 if (strcmp(name
, _mesa_glsl_supported_extensions
[i
].name
) == 0) {
675 return &_mesa_glsl_supported_extensions
[i
];
683 _mesa_glsl_process_extension(const char *name
, YYLTYPE
*name_locp
,
684 const char *behavior_string
, YYLTYPE
*behavior_locp
,
685 _mesa_glsl_parse_state
*state
)
687 ext_behavior behavior
;
688 if (strcmp(behavior_string
, "warn") == 0) {
689 behavior
= extension_warn
;
690 } else if (strcmp(behavior_string
, "require") == 0) {
691 behavior
= extension_require
;
692 } else if (strcmp(behavior_string
, "enable") == 0) {
693 behavior
= extension_enable
;
694 } else if (strcmp(behavior_string
, "disable") == 0) {
695 behavior
= extension_disable
;
697 _mesa_glsl_error(behavior_locp
, state
,
698 "unknown extension behavior `%s'",
703 if (strcmp(name
, "all") == 0) {
704 if ((behavior
== extension_enable
) || (behavior
== extension_require
)) {
705 _mesa_glsl_error(name_locp
, state
, "cannot %s all extensions",
706 (behavior
== extension_enable
)
707 ? "enable" : "require");
711 i
< ARRAY_SIZE(_mesa_glsl_supported_extensions
); ++i
) {
712 const _mesa_glsl_extension
*extension
713 = &_mesa_glsl_supported_extensions
[i
];
714 if (extension
->compatible_with_state(state
)) {
715 _mesa_glsl_supported_extensions
[i
].set_flags(state
, behavior
);
720 const _mesa_glsl_extension
*extension
= find_extension(name
);
721 if (extension
&& extension
->compatible_with_state(state
)) {
722 extension
->set_flags(state
, behavior
);
724 static const char fmt
[] = "extension `%s' unsupported in %s shader";
726 if (behavior
== extension_require
) {
727 _mesa_glsl_error(name_locp
, state
, fmt
,
728 name
, _mesa_shader_stage_to_string(state
->stage
));
731 _mesa_glsl_warning(name_locp
, state
, fmt
,
732 name
, _mesa_shader_stage_to_string(state
->stage
));
742 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
743 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
744 * (process_array_constructor, et al) sufficient information to do type
747 * Operates on assignments involving an aggregate initializer. E.g.,
749 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
751 * or more ridiculously,
764 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
765 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
770 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
771 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
777 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
778 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
784 * This pass is necessary because the right-hand side of <type> e = { ... }
785 * doesn't contain sufficient information to determine if the types match.
788 _mesa_ast_set_aggregate_type(const glsl_type
*type
,
789 ast_expression
*expr
)
791 ast_aggregate_initializer
*ai
= (ast_aggregate_initializer
*)expr
;
792 ai
->constructor_type
= type
;
794 /* If the aggregate is an array, recursively set its elements' types. */
795 if (type
->is_array()) {
796 /* Each array element has the type type->fields.array.
798 * E.g., if <type> if struct S[2] we want to set each element's type to
801 for (exec_node
*expr_node
= ai
->expressions
.head
;
802 !expr_node
->is_tail_sentinel();
803 expr_node
= expr_node
->next
) {
804 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
807 if (expr
->oper
== ast_aggregate
)
808 _mesa_ast_set_aggregate_type(type
->fields
.array
, expr
);
811 /* If the aggregate is a struct, recursively set its fields' types. */
812 } else if (type
->is_record()) {
813 exec_node
*expr_node
= ai
->expressions
.head
;
815 /* Iterate through the struct's fields. */
816 for (unsigned i
= 0; !expr_node
->is_tail_sentinel() && i
< type
->length
;
817 i
++, expr_node
= expr_node
->next
) {
818 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
821 if (expr
->oper
== ast_aggregate
) {
822 _mesa_ast_set_aggregate_type(type
->fields
.structure
[i
].type
, expr
);
825 /* If the aggregate is a matrix, set its columns' types. */
826 } else if (type
->is_matrix()) {
827 for (exec_node
*expr_node
= ai
->expressions
.head
;
828 !expr_node
->is_tail_sentinel();
829 expr_node
= expr_node
->next
) {
830 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
833 if (expr
->oper
== ast_aggregate
)
834 _mesa_ast_set_aggregate_type(type
->column_type(), expr
);
840 _mesa_ast_process_interface_block(YYLTYPE
*locp
,
841 _mesa_glsl_parse_state
*state
,
842 ast_interface_block
*const block
,
843 const struct ast_type_qualifier
&q
)
845 if (q
.flags
.q
.buffer
) {
846 if (!state
->has_shader_storage_buffer_objects()) {
847 _mesa_glsl_error(locp
, state
,
848 "#version 430 / GL_ARB_shader_storage_buffer_object "
849 "required for defining shader storage blocks");
850 } else if (state
->ARB_shader_storage_buffer_object_warn
) {
851 _mesa_glsl_warning(locp
, state
,
852 "#version 430 / GL_ARB_shader_storage_buffer_object "
853 "required for defining shader storage blocks");
855 } else if (q
.flags
.q
.uniform
) {
856 if (!state
->has_uniform_buffer_objects()) {
857 _mesa_glsl_error(locp
, state
,
858 "#version 140 / GL_ARB_uniform_buffer_object "
859 "required for defining uniform blocks");
860 } else if (state
->ARB_uniform_buffer_object_warn
) {
861 _mesa_glsl_warning(locp
, state
,
862 "#version 140 / GL_ARB_uniform_buffer_object "
863 "required for defining uniform blocks");
866 if (state
->es_shader
|| state
->language_version
< 150) {
867 _mesa_glsl_error(locp
, state
,
868 "#version 150 required for using "
873 /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
874 * "It is illegal to have an input block in a vertex shader
875 * or an output block in a fragment shader"
877 if ((state
->stage
== MESA_SHADER_VERTEX
) && q
.flags
.q
.in
) {
878 _mesa_glsl_error(locp
, state
,
879 "`in' interface block is not allowed for "
881 } else if ((state
->stage
== MESA_SHADER_FRAGMENT
) && q
.flags
.q
.out
) {
882 _mesa_glsl_error(locp
, state
,
883 "`out' interface block is not allowed for "
884 "a fragment shader");
887 /* Since block arrays require names, and both features are added in
888 * the same language versions, we don't have to explicitly
889 * version-check both things.
891 if (block
->instance_name
!= NULL
) {
892 state
->check_version(150, 300, locp
, "interface blocks with "
893 "an instance name are not allowed");
896 uint64_t interface_type_mask
;
897 struct ast_type_qualifier temp_type_qualifier
;
899 /* Get a bitmask containing only the in/out/uniform/buffer
900 * flags, allowing us to ignore other irrelevant flags like
901 * interpolation qualifiers.
903 temp_type_qualifier
.flags
.i
= 0;
904 temp_type_qualifier
.flags
.q
.uniform
= true;
905 temp_type_qualifier
.flags
.q
.in
= true;
906 temp_type_qualifier
.flags
.q
.out
= true;
907 temp_type_qualifier
.flags
.q
.buffer
= true;
908 interface_type_mask
= temp_type_qualifier
.flags
.i
;
910 /* Get the block's interface qualifier. The interface_qualifier
911 * production rule guarantees that only one bit will be set (and
912 * it will be in/out/uniform).
914 uint64_t block_interface_qualifier
= q
.flags
.i
;
916 block
->layout
.flags
.i
|= block_interface_qualifier
;
918 if (state
->stage
== MESA_SHADER_GEOMETRY
&&
919 state
->has_explicit_attrib_stream()) {
920 /* Assign global layout's stream value. */
921 block
->layout
.flags
.q
.stream
= 1;
922 block
->layout
.flags
.q
.explicit_stream
= 0;
923 block
->layout
.stream
= state
->out_qualifier
->stream
;
926 foreach_list_typed (ast_declarator_list
, member
, link
, &block
->declarations
) {
927 ast_type_qualifier
& qualifier
= member
->type
->qualifier
;
928 if ((qualifier
.flags
.i
& interface_type_mask
) == 0) {
929 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
930 * "If no optional qualifier is used in a member declaration, the
931 * qualifier of the variable is just in, out, or uniform as declared
932 * by interface-qualifier."
934 qualifier
.flags
.i
|= block_interface_qualifier
;
935 } else if ((qualifier
.flags
.i
& interface_type_mask
) !=
936 block_interface_qualifier
) {
937 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
938 * "If optional qualifiers are used, they can include interpolation
939 * and storage qualifiers and they must declare an input, output,
940 * or uniform variable consistent with the interface qualifier of
943 _mesa_glsl_error(locp
, state
,
944 "uniform/in/out qualifier on "
945 "interface block member does not match "
946 "the interface block");
949 /* From GLSL ES 3.0, chapter 4.3.7 "Interface Blocks":
951 * "GLSL ES 3.0 does not support interface blocks for shader inputs or
954 * And from GLSL ES 3.0, chapter 4.6.1 "The invariant qualifier":.
956 * "Only variables output from a shader can be candidates for
959 * From GLSL 4.40 and GLSL 1.50, section "Interface Blocks":
961 * "If optional qualifiers are used, they can include interpolation
962 * qualifiers, auxiliary storage qualifiers, and storage qualifiers
963 * and they must declare an input, output, or uniform member
964 * consistent with the interface qualifier of the block"
966 if (qualifier
.flags
.q
.invariant
)
967 _mesa_glsl_error(locp
, state
,
968 "invariant qualifiers cannot be used "
969 "with interface blocks members");
974 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier
*q
)
976 if (q
->flags
.q
.subroutine
)
977 printf("subroutine ");
979 if (q
->flags
.q
.subroutine_def
) {
980 printf("subroutine (");
981 q
->subroutine_list
->print();
985 if (q
->flags
.q
.constant
)
988 if (q
->flags
.q
.invariant
)
989 printf("invariant ");
991 if (q
->flags
.q
.attribute
)
992 printf("attribute ");
994 if (q
->flags
.q
.varying
)
997 if (q
->flags
.q
.in
&& q
->flags
.q
.out
)
1007 if (q
->flags
.q
.centroid
)
1008 printf("centroid ");
1009 if (q
->flags
.q
.sample
)
1011 if (q
->flags
.q
.patch
)
1013 if (q
->flags
.q
.uniform
)
1015 if (q
->flags
.q
.buffer
)
1017 if (q
->flags
.q
.smooth
)
1019 if (q
->flags
.q
.flat
)
1021 if (q
->flags
.q
.noperspective
)
1022 printf("noperspective ");
1027 ast_node::print(void) const
1029 printf("unhandled node ");
1033 ast_node::ast_node(void)
1035 this->location
.source
= 0;
1036 this->location
.first_line
= 0;
1037 this->location
.first_column
= 0;
1038 this->location
.last_line
= 0;
1039 this->location
.last_column
= 0;
1044 ast_opt_array_dimensions_print(const ast_array_specifier
*array_specifier
)
1046 if (array_specifier
)
1047 array_specifier
->print();
1052 ast_compound_statement::print(void) const
1056 foreach_list_typed(ast_node
, ast
, link
, &this->statements
) {
1064 ast_compound_statement::ast_compound_statement(int new_scope
,
1065 ast_node
*statements
)
1067 this->new_scope
= new_scope
;
1069 if (statements
!= NULL
) {
1070 this->statements
.push_degenerate_list_at_head(&statements
->link
);
1076 ast_expression::print(void) const
1080 case ast_mul_assign
:
1081 case ast_div_assign
:
1082 case ast_mod_assign
:
1083 case ast_add_assign
:
1084 case ast_sub_assign
:
1087 case ast_and_assign
:
1088 case ast_xor_assign
:
1090 subexpressions
[0]->print();
1091 printf("%s ", operator_string(oper
));
1092 subexpressions
[1]->print();
1095 case ast_field_selection
:
1096 subexpressions
[0]->print();
1097 printf(". %s ", primary_expression
.identifier
);
1106 printf("%s ", operator_string(oper
));
1107 subexpressions
[0]->print();
1112 subexpressions
[0]->print();
1113 printf("%s ", operator_string(oper
));
1116 case ast_conditional
:
1117 subexpressions
[0]->print();
1119 subexpressions
[1]->print();
1121 subexpressions
[2]->print();
1124 case ast_array_index
:
1125 subexpressions
[0]->print();
1127 subexpressions
[1]->print();
1131 case ast_function_call
: {
1132 subexpressions
[0]->print();
1135 foreach_list_typed (ast_node
, ast
, link
, &this->expressions
) {
1136 if (&ast
->link
!= this->expressions
.get_head())
1146 case ast_identifier
:
1147 printf("%s ", primary_expression
.identifier
);
1150 case ast_int_constant
:
1151 printf("%d ", primary_expression
.int_constant
);
1154 case ast_uint_constant
:
1155 printf("%u ", primary_expression
.uint_constant
);
1158 case ast_float_constant
:
1159 printf("%f ", primary_expression
.float_constant
);
1162 case ast_double_constant
:
1163 printf("%f ", primary_expression
.double_constant
);
1166 case ast_bool_constant
:
1168 primary_expression
.bool_constant
1169 ? "true" : "false");
1172 case ast_sequence
: {
1174 foreach_list_typed (ast_node
, ast
, link
, & this->expressions
) {
1175 if (&ast
->link
!= this->expressions
.get_head())
1184 case ast_aggregate
: {
1186 foreach_list_typed (ast_node
, ast
, link
, & this->expressions
) {
1187 if (&ast
->link
!= this->expressions
.get_head())
1202 ast_expression::ast_expression(int oper
,
1203 ast_expression
*ex0
,
1204 ast_expression
*ex1
,
1205 ast_expression
*ex2
) :
1206 primary_expression()
1208 this->oper
= ast_operators(oper
);
1209 this->subexpressions
[0] = ex0
;
1210 this->subexpressions
[1] = ex1
;
1211 this->subexpressions
[2] = ex2
;
1212 this->non_lvalue_description
= NULL
;
1217 ast_expression_statement::print(void) const
1220 expression
->print();
1226 ast_expression_statement::ast_expression_statement(ast_expression
*ex
) :
1234 ast_function::print(void) const
1236 return_type
->print();
1237 printf(" %s (", identifier
);
1239 foreach_list_typed(ast_node
, ast
, link
, & this->parameters
) {
1247 ast_function::ast_function(void)
1248 : return_type(NULL
), identifier(NULL
), is_definition(false),
1256 ast_fully_specified_type::print(void) const
1258 _mesa_ast_type_qualifier_print(& qualifier
);
1264 ast_parameter_declarator::print(void) const
1268 printf("%s ", identifier
);
1269 ast_opt_array_dimensions_print(array_specifier
);
1274 ast_function_definition::print(void) const
1282 ast_declaration::print(void) const
1284 printf("%s ", identifier
);
1285 ast_opt_array_dimensions_print(array_specifier
);
1289 initializer
->print();
1294 ast_declaration::ast_declaration(const char *identifier
,
1295 ast_array_specifier
*array_specifier
,
1296 ast_expression
*initializer
)
1298 this->identifier
= identifier
;
1299 this->array_specifier
= array_specifier
;
1300 this->initializer
= initializer
;
1305 ast_declarator_list::print(void) const
1307 assert(type
|| invariant
);
1312 printf("invariant ");
1316 foreach_list_typed (ast_node
, ast
, link
, & this->declarations
) {
1317 if (&ast
->link
!= this->declarations
.get_head())
1327 ast_declarator_list::ast_declarator_list(ast_fully_specified_type
*type
)
1330 this->invariant
= false;
1331 this->precise
= false;
1335 ast_jump_statement::print(void) const
1339 printf("continue; ");
1346 if (opt_return_value
)
1347 opt_return_value
->print();
1352 printf("discard; ");
1358 ast_jump_statement::ast_jump_statement(int mode
, ast_expression
*return_value
)
1359 : opt_return_value(NULL
)
1361 this->mode
= ast_jump_modes(mode
);
1363 if (mode
== ast_return
)
1364 opt_return_value
= return_value
;
1369 ast_selection_statement::print(void) const
1375 then_statement
->print();
1377 if (else_statement
) {
1379 else_statement
->print();
1384 ast_selection_statement::ast_selection_statement(ast_expression
*condition
,
1385 ast_node
*then_statement
,
1386 ast_node
*else_statement
)
1388 this->condition
= condition
;
1389 this->then_statement
= then_statement
;
1390 this->else_statement
= else_statement
;
1395 ast_switch_statement::print(void) const
1397 printf("switch ( ");
1398 test_expression
->print();
1405 ast_switch_statement::ast_switch_statement(ast_expression
*test_expression
,
1408 this->test_expression
= test_expression
;
1414 ast_switch_body::print(void) const
1417 if (stmts
!= NULL
) {
1424 ast_switch_body::ast_switch_body(ast_case_statement_list
*stmts
)
1426 this->stmts
= stmts
;
1430 void ast_case_label::print(void) const
1432 if (test_value
!= NULL
) {
1434 test_value
->print();
1437 printf("default: ");
1442 ast_case_label::ast_case_label(ast_expression
*test_value
)
1444 this->test_value
= test_value
;
1448 void ast_case_label_list::print(void) const
1450 foreach_list_typed(ast_node
, ast
, link
, & this->labels
) {
1457 ast_case_label_list::ast_case_label_list(void)
1462 void ast_case_statement::print(void) const
1465 foreach_list_typed(ast_node
, ast
, link
, & this->stmts
) {
1472 ast_case_statement::ast_case_statement(ast_case_label_list
*labels
)
1474 this->labels
= labels
;
1478 void ast_case_statement_list::print(void) const
1480 foreach_list_typed(ast_node
, ast
, link
, & this->cases
) {
1486 ast_case_statement_list::ast_case_statement_list(void)
1492 ast_iteration_statement::print(void) const
1498 init_statement
->print();
1505 if (rest_expression
)
1506 rest_expression
->print();
1532 ast_iteration_statement::ast_iteration_statement(int mode
,
1534 ast_node
*condition
,
1535 ast_expression
*rest_expression
,
1538 this->mode
= ast_iteration_modes(mode
);
1539 this->init_statement
= init
;
1540 this->condition
= condition
;
1541 this->rest_expression
= rest_expression
;
1547 ast_struct_specifier::print(void) const
1549 printf("struct %s { ", name
);
1550 foreach_list_typed(ast_node
, ast
, link
, &this->declarations
) {
1557 ast_struct_specifier::ast_struct_specifier(const char *identifier
,
1558 ast_declarator_list
*declarator_list
)
1560 if (identifier
== NULL
) {
1561 static mtx_t mutex
= _MTX_INITIALIZER_NP
;
1562 static unsigned anon_count
= 1;
1566 count
= anon_count
++;
1569 identifier
= ralloc_asprintf(this, "#anon_struct_%04x", count
);
1572 this->declarations
.push_degenerate_list_at_head(&declarator_list
->link
);
1573 is_declaration
= true;
1576 void ast_subroutine_list::print(void) const
1578 foreach_list_typed (ast_node
, ast
, link
, & this->declarations
) {
1579 if (&ast
->link
!= this->declarations
.get_head())
1586 set_shader_inout_layout(struct gl_shader
*shader
,
1587 struct _mesa_glsl_parse_state
*state
)
1589 /* Should have been prevented by the parser. */
1590 if (shader
->Stage
== MESA_SHADER_TESS_CTRL
) {
1591 assert(!state
->in_qualifier
->flags
.i
);
1592 } else if (shader
->Stage
== MESA_SHADER_TESS_EVAL
) {
1593 assert(!state
->out_qualifier
->flags
.i
);
1594 } else if (shader
->Stage
!= MESA_SHADER_GEOMETRY
) {
1595 assert(!state
->in_qualifier
->flags
.i
);
1596 assert(!state
->out_qualifier
->flags
.i
);
1599 if (shader
->Stage
!= MESA_SHADER_COMPUTE
) {
1600 /* Should have been prevented by the parser. */
1601 assert(!state
->cs_input_local_size_specified
);
1604 if (shader
->Stage
!= MESA_SHADER_FRAGMENT
) {
1605 /* Should have been prevented by the parser. */
1606 assert(!state
->fs_uses_gl_fragcoord
);
1607 assert(!state
->fs_redeclares_gl_fragcoord
);
1608 assert(!state
->fs_pixel_center_integer
);
1609 assert(!state
->fs_origin_upper_left
);
1610 assert(!state
->fs_early_fragment_tests
);
1613 switch (shader
->Stage
) {
1614 case MESA_SHADER_TESS_CTRL
:
1615 shader
->TessCtrl
.VerticesOut
= 0;
1616 if (state
->tcs_output_vertices_specified
) {
1618 if (state
->out_qualifier
->vertices
->
1619 process_qualifier_constant(state
, "vertices", &vertices
,
1622 YYLTYPE loc
= state
->out_qualifier
->vertices
->get_location();
1623 if (vertices
> state
->Const
.MaxPatchVertices
) {
1624 _mesa_glsl_error(&loc
, state
, "vertices (%d) exceeds "
1625 "GL_MAX_PATCH_VERTICES", vertices
);
1627 shader
->TessCtrl
.VerticesOut
= vertices
;
1631 case MESA_SHADER_TESS_EVAL
:
1632 shader
->TessEval
.PrimitiveMode
= PRIM_UNKNOWN
;
1633 if (state
->in_qualifier
->flags
.q
.prim_type
)
1634 shader
->TessEval
.PrimitiveMode
= state
->in_qualifier
->prim_type
;
1636 shader
->TessEval
.Spacing
= 0;
1637 if (state
->in_qualifier
->flags
.q
.vertex_spacing
)
1638 shader
->TessEval
.Spacing
= state
->in_qualifier
->vertex_spacing
;
1640 shader
->TessEval
.VertexOrder
= 0;
1641 if (state
->in_qualifier
->flags
.q
.ordering
)
1642 shader
->TessEval
.VertexOrder
= state
->in_qualifier
->ordering
;
1644 shader
->TessEval
.PointMode
= -1;
1645 if (state
->in_qualifier
->flags
.q
.point_mode
)
1646 shader
->TessEval
.PointMode
= state
->in_qualifier
->point_mode
;
1648 case MESA_SHADER_GEOMETRY
:
1649 shader
->Geom
.VerticesOut
= 0;
1650 if (state
->out_qualifier
->flags
.q
.max_vertices
) {
1651 unsigned qual_max_vertices
;
1652 if (state
->out_qualifier
->max_vertices
->
1653 process_qualifier_constant(state
, "max_vertices",
1654 &qual_max_vertices
, true)) {
1655 shader
->Geom
.VerticesOut
= qual_max_vertices
;
1659 if (state
->gs_input_prim_type_specified
) {
1660 shader
->Geom
.InputType
= state
->in_qualifier
->prim_type
;
1662 shader
->Geom
.InputType
= PRIM_UNKNOWN
;
1665 if (state
->out_qualifier
->flags
.q
.prim_type
) {
1666 shader
->Geom
.OutputType
= state
->out_qualifier
->prim_type
;
1668 shader
->Geom
.OutputType
= PRIM_UNKNOWN
;
1671 shader
->Geom
.Invocations
= 0;
1672 if (state
->in_qualifier
->flags
.q
.invocations
) {
1673 unsigned invocations
;
1674 if (state
->in_qualifier
->invocations
->
1675 process_qualifier_constant(state
, "invocations",
1676 &invocations
, false)) {
1678 YYLTYPE loc
= state
->in_qualifier
->invocations
->get_location();
1679 if (invocations
> MAX_GEOMETRY_SHADER_INVOCATIONS
) {
1680 _mesa_glsl_error(&loc
, state
,
1681 "invocations (%d) exceeds "
1682 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1685 shader
->Geom
.Invocations
= invocations
;
1690 case MESA_SHADER_COMPUTE
:
1691 if (state
->cs_input_local_size_specified
) {
1692 for (int i
= 0; i
< 3; i
++)
1693 shader
->Comp
.LocalSize
[i
] = state
->cs_input_local_size
[i
];
1695 for (int i
= 0; i
< 3; i
++)
1696 shader
->Comp
.LocalSize
[i
] = 0;
1700 case MESA_SHADER_FRAGMENT
:
1701 shader
->redeclares_gl_fragcoord
= state
->fs_redeclares_gl_fragcoord
;
1702 shader
->uses_gl_fragcoord
= state
->fs_uses_gl_fragcoord
;
1703 shader
->pixel_center_integer
= state
->fs_pixel_center_integer
;
1704 shader
->origin_upper_left
= state
->fs_origin_upper_left
;
1705 shader
->ARB_fragment_coord_conventions_enable
=
1706 state
->ARB_fragment_coord_conventions_enable
;
1707 shader
->EarlyFragmentTests
= state
->fs_early_fragment_tests
;
1711 /* Nothing to do. */
1719 _mesa_glsl_compile_shader(struct gl_context
*ctx
, struct gl_shader
*shader
,
1720 bool dump_ast
, bool dump_hir
)
1722 struct _mesa_glsl_parse_state
*state
=
1723 new(shader
) _mesa_glsl_parse_state(ctx
, shader
->Stage
, shader
);
1724 const char *source
= shader
->Source
;
1726 if (ctx
->Const
.GenerateTemporaryNames
)
1727 (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names
,
1730 state
->error
= glcpp_preprocess(state
, &source
, &state
->info_log
,
1731 &ctx
->Extensions
, ctx
);
1733 if (!state
->error
) {
1734 _mesa_glsl_lexer_ctor(state
, source
);
1735 _mesa_glsl_parse(state
);
1736 _mesa_glsl_lexer_dtor(state
);
1740 foreach_list_typed(ast_node
, ast
, link
, &state
->translation_unit
) {
1746 ralloc_free(shader
->ir
);
1747 shader
->ir
= new(shader
) exec_list
;
1748 if (!state
->error
&& !state
->translation_unit
.is_empty())
1749 _mesa_ast_to_hir(shader
->ir
, state
);
1751 if (!state
->error
) {
1752 validate_ir_tree(shader
->ir
);
1754 /* Print out the unoptimized IR. */
1756 _mesa_print_ir(stdout
, shader
->ir
, state
);
1761 if (!state
->error
&& !shader
->ir
->is_empty()) {
1762 struct gl_shader_compiler_options
*options
=
1763 &ctx
->Const
.ShaderCompilerOptions
[shader
->Stage
];
1765 lower_subroutine(shader
->ir
, state
);
1766 /* Do some optimization at compile time to reduce shader IR size
1767 * and reduce later work if the same shader is linked multiple times
1769 while (do_common_optimization(shader
->ir
, false, false, options
,
1770 ctx
->Const
.NativeIntegers
))
1773 validate_ir_tree(shader
->ir
);
1775 enum ir_variable_mode other
;
1776 switch (shader
->Stage
) {
1777 case MESA_SHADER_VERTEX
:
1778 other
= ir_var_shader_in
;
1780 case MESA_SHADER_FRAGMENT
:
1781 other
= ir_var_shader_out
;
1784 /* Something invalid to ensure optimize_dead_builtin_uniforms
1785 * doesn't remove anything other than uniforms or constants.
1787 other
= ir_var_mode_count
;
1791 optimize_dead_builtin_variables(shader
->ir
, other
);
1793 validate_ir_tree(shader
->ir
);
1796 if (shader
->InfoLog
)
1797 ralloc_free(shader
->InfoLog
);
1800 set_shader_inout_layout(shader
, state
);
1802 shader
->symbols
= new(shader
->ir
) glsl_symbol_table
;
1803 shader
->CompileStatus
= !state
->error
;
1804 shader
->InfoLog
= state
->info_log
;
1805 shader
->Version
= state
->language_version
;
1806 shader
->IsES
= state
->es_shader
;
1807 shader
->uses_builtin_functions
= state
->uses_builtin_functions
;
1809 /* Retain any live IR, but trash the rest. */
1810 reparent_ir(shader
->ir
, shader
->ir
);
1812 /* Destroy the symbol table. Create a new symbol table that contains only
1813 * the variables and functions that still exist in the IR. The symbol
1814 * table will be used later during linking.
1816 * There must NOT be any freed objects still referenced by the symbol
1817 * table. That could cause the linker to dereference freed memory.
1819 * We don't have to worry about types or interface-types here because those
1820 * are fly-weights that are looked up by glsl_type.
1822 foreach_in_list (ir_instruction
, ir
, shader
->ir
) {
1823 switch (ir
->ir_type
) {
1824 case ir_type_function
:
1825 shader
->symbols
->add_function((ir_function
*) ir
);
1827 case ir_type_variable
: {
1828 ir_variable
*const var
= (ir_variable
*) ir
;
1830 if (var
->data
.mode
!= ir_var_temporary
)
1831 shader
->symbols
->add_variable(var
);
1839 _mesa_glsl_initialize_derived_variables(shader
);
1841 delete state
->symbols
;
1847 * Do the set of common optimizations passes
1849 * \param ir List of instructions to be optimized
1850 * \param linked Is the shader linked? This enables
1851 * optimizations passes that remove code at
1852 * global scope and could cause linking to
1854 * \param uniform_locations_assigned Have locations already been assigned for
1855 * uniforms? This prevents the declarations
1856 * of unused uniforms from being removed.
1857 * The setting of this flag only matters if
1858 * \c linked is \c true.
1859 * \param max_unroll_iterations Maximum number of loop iterations to be
1860 * unrolled. Setting to 0 disables loop
1862 * \param options The driver's preferred shader options.
1865 do_common_optimization(exec_list
*ir
, bool linked
,
1866 bool uniform_locations_assigned
,
1867 const struct gl_shader_compiler_options
*options
,
1868 bool native_integers
)
1870 GLboolean progress
= GL_FALSE
;
1872 progress
= lower_instructions(ir
, SUB_TO_ADD_NEG
) || progress
;
1875 progress
= do_function_inlining(ir
) || progress
;
1876 progress
= do_dead_functions(ir
) || progress
;
1877 progress
= do_structure_splitting(ir
) || progress
;
1879 progress
= do_if_simplification(ir
) || progress
;
1880 progress
= opt_flatten_nested_if_blocks(ir
) || progress
;
1881 progress
= opt_conditional_discard(ir
) || progress
;
1882 progress
= do_copy_propagation(ir
) || progress
;
1883 progress
= do_copy_propagation_elements(ir
) || progress
;
1885 if (options
->OptimizeForAOS
&& !linked
)
1886 progress
= opt_flip_matrices(ir
) || progress
;
1888 if (linked
&& options
->OptimizeForAOS
) {
1889 progress
= do_vectorize(ir
) || progress
;
1893 progress
= do_dead_code(ir
, uniform_locations_assigned
) || progress
;
1895 progress
= do_dead_code_unlinked(ir
) || progress
;
1896 progress
= do_dead_code_local(ir
) || progress
;
1897 progress
= do_tree_grafting(ir
) || progress
;
1898 progress
= do_constant_propagation(ir
) || progress
;
1900 progress
= do_constant_variable(ir
) || progress
;
1902 progress
= do_constant_variable_unlinked(ir
) || progress
;
1903 progress
= do_constant_folding(ir
) || progress
;
1904 progress
= do_minmax_prune(ir
) || progress
;
1905 progress
= do_rebalance_tree(ir
) || progress
;
1906 progress
= do_algebraic(ir
, native_integers
, options
) || progress
;
1907 progress
= do_lower_jumps(ir
) || progress
;
1908 progress
= do_vec_index_to_swizzle(ir
) || progress
;
1909 progress
= lower_vector_insert(ir
, false) || progress
;
1910 progress
= do_swizzle_swizzle(ir
) || progress
;
1911 progress
= do_noop_swizzle(ir
) || progress
;
1913 progress
= optimize_split_arrays(ir
, linked
) || progress
;
1914 progress
= optimize_redundant_jumps(ir
) || progress
;
1916 loop_state
*ls
= analyze_loop_variables(ir
);
1917 if (ls
->loop_found
) {
1918 progress
= set_loop_controls(ir
, ls
) || progress
;
1919 progress
= unroll_loops(ir
, ls
, options
) || progress
;
1929 * To be called at GL teardown time, this frees compiler datastructures.
1931 * After calling this, any previously compiled shaders and shader
1932 * programs would be invalid. So this should happen at approximately
1936 _mesa_destroy_shader_compiler(void)
1938 _mesa_destroy_shader_compiler_caches();
1940 _mesa_glsl_release_types();
1944 * Releases compiler caches to trade off performance for memory.
1946 * Intended to be used with glReleaseShaderCompiler().
1949 _mesa_destroy_shader_compiler_caches(void)
1951 _mesa_glsl_release_builtin_functions();