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 };
55 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context
*_ctx
,
56 gl_shader_stage stage
,
58 : ctx(_ctx
), cs_input_local_size_specified(false), cs_input_local_size(),
61 assert(stage
< MESA_SHADER_STAGES
);
65 this->translation_unit
.make_empty();
66 this->symbols
= new(mem_ctx
) glsl_symbol_table
;
68 this->info_log
= ralloc_strdup(mem_ctx
, "");
70 this->loop_nesting_ast
= NULL
;
72 this->uses_builtin_functions
= false;
74 /* Set default language version and extensions */
75 this->language_version
= 110;
76 this->forced_language_version
= ctx
->Const
.ForceGLSLVersion
;
77 this->es_shader
= false;
78 this->ARB_texture_rectangle_enable
= true;
80 /* OpenGL ES 2.0 has different defaults from desktop GL. */
81 if (ctx
->API
== API_OPENGLES2
) {
82 this->language_version
= 100;
83 this->es_shader
= true;
84 this->ARB_texture_rectangle_enable
= false;
87 this->extensions
= &ctx
->Extensions
;
89 this->ARB_compute_shader_enable
= true;
91 this->Const
.MaxLights
= ctx
->Const
.MaxLights
;
92 this->Const
.MaxClipPlanes
= ctx
->Const
.MaxClipPlanes
;
93 this->Const
.MaxTextureUnits
= ctx
->Const
.MaxTextureUnits
;
94 this->Const
.MaxTextureCoords
= ctx
->Const
.MaxTextureCoordUnits
;
95 this->Const
.MaxVertexAttribs
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAttribs
;
96 this->Const
.MaxVertexUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxUniformComponents
;
97 this->Const
.MaxVertexTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
;
98 this->Const
.MaxCombinedTextureImageUnits
= ctx
->Const
.MaxCombinedTextureImageUnits
;
99 this->Const
.MaxTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
;
100 this->Const
.MaxFragmentUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxUniformComponents
;
101 this->Const
.MinProgramTexelOffset
= ctx
->Const
.MinProgramTexelOffset
;
102 this->Const
.MaxProgramTexelOffset
= ctx
->Const
.MaxProgramTexelOffset
;
104 this->Const
.MaxDrawBuffers
= ctx
->Const
.MaxDrawBuffers
;
106 this->Const
.MaxDualSourceDrawBuffers
= ctx
->Const
.MaxDualSourceDrawBuffers
;
109 this->Const
.MaxVertexOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxOutputComponents
;
110 this->Const
.MaxGeometryInputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxInputComponents
;
111 this->Const
.MaxGeometryOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxOutputComponents
;
112 this->Const
.MaxFragmentInputComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxInputComponents
;
113 this->Const
.MaxGeometryTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
;
114 this->Const
.MaxGeometryOutputVertices
= ctx
->Const
.MaxGeometryOutputVertices
;
115 this->Const
.MaxGeometryTotalOutputComponents
= ctx
->Const
.MaxGeometryTotalOutputComponents
;
116 this->Const
.MaxGeometryUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxUniformComponents
;
118 this->Const
.MaxVertexAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicCounters
;
119 this->Const
.MaxTessControlAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxAtomicCounters
;
120 this->Const
.MaxTessEvaluationAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxAtomicCounters
;
121 this->Const
.MaxGeometryAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicCounters
;
122 this->Const
.MaxFragmentAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicCounters
;
123 this->Const
.MaxComputeAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].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
.MaxComputeAtomicCounterBuffers
=
137 ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxAtomicBuffers
;
138 this->Const
.MaxCombinedAtomicCounterBuffers
=
139 ctx
->Const
.MaxCombinedAtomicBuffers
;
140 this->Const
.MaxAtomicCounterBufferSize
=
141 ctx
->Const
.MaxAtomicBufferSize
;
143 /* Compute shader constants */
144 for (unsigned i
= 0; i
< ARRAY_SIZE(this->Const
.MaxComputeWorkGroupCount
); i
++)
145 this->Const
.MaxComputeWorkGroupCount
[i
] = ctx
->Const
.MaxComputeWorkGroupCount
[i
];
146 for (unsigned i
= 0; i
< ARRAY_SIZE(this->Const
.MaxComputeWorkGroupSize
); i
++)
147 this->Const
.MaxComputeWorkGroupSize
[i
] = ctx
->Const
.MaxComputeWorkGroupSize
[i
];
149 this->Const
.MaxComputeTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxTextureImageUnits
;
150 this->Const
.MaxComputeUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxUniformComponents
;
152 this->Const
.MaxImageUnits
= ctx
->Const
.MaxImageUnits
;
153 this->Const
.MaxCombinedShaderOutputResources
= ctx
->Const
.MaxCombinedShaderOutputResources
;
154 this->Const
.MaxImageSamples
= ctx
->Const
.MaxImageSamples
;
155 this->Const
.MaxVertexImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxImageUniforms
;
156 this->Const
.MaxTessControlImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxImageUniforms
;
157 this->Const
.MaxTessEvaluationImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxImageUniforms
;
158 this->Const
.MaxGeometryImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxImageUniforms
;
159 this->Const
.MaxFragmentImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxImageUniforms
;
160 this->Const
.MaxComputeImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxImageUniforms
;
161 this->Const
.MaxCombinedImageUniforms
= ctx
->Const
.MaxCombinedImageUniforms
;
163 /* ARB_viewport_array */
164 this->Const
.MaxViewports
= ctx
->Const
.MaxViewports
;
166 /* tessellation shader constants */
167 this->Const
.MaxPatchVertices
= ctx
->Const
.MaxPatchVertices
;
168 this->Const
.MaxTessGenLevel
= ctx
->Const
.MaxTessGenLevel
;
169 this->Const
.MaxTessControlInputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxInputComponents
;
170 this->Const
.MaxTessControlOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxOutputComponents
;
171 this->Const
.MaxTessControlTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxTextureImageUnits
;
172 this->Const
.MaxTessEvaluationInputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxInputComponents
;
173 this->Const
.MaxTessEvaluationOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxOutputComponents
;
174 this->Const
.MaxTessEvaluationTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxTextureImageUnits
;
175 this->Const
.MaxTessPatchComponents
= ctx
->Const
.MaxTessPatchComponents
;
176 this->Const
.MaxTessControlTotalOutputComponents
= ctx
->Const
.MaxTessControlTotalOutputComponents
;
177 this->Const
.MaxTessControlUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxUniformComponents
;
178 this->Const
.MaxTessEvaluationUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxUniformComponents
;
180 this->current_function
= NULL
;
181 this->toplevel_ir
= NULL
;
182 this->found_return
= false;
183 this->all_invariant
= false;
184 this->user_structures
= NULL
;
185 this->num_user_structures
= 0;
186 this->num_subroutines
= 0;
187 this->subroutines
= NULL
;
188 this->num_subroutine_types
= 0;
189 this->subroutine_types
= NULL
;
191 /* supported_versions should be large enough to support the known desktop
192 * GLSL versions plus 3 GLES versions (ES 1.00, ES 3.00, and ES 3.10))
194 STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions
) + 3) ==
195 ARRAY_SIZE(this->supported_versions
));
197 /* Populate the list of supported GLSL versions */
198 /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
199 * the OpenGL 3.2 Core context is supported, this logic will need
200 * change. Older versions of GLSL are no longer supported
201 * outside the compatibility contexts of 3.x.
203 this->num_supported_versions
= 0;
204 if (_mesa_is_desktop_gl(ctx
)) {
205 for (unsigned i
= 0; i
< ARRAY_SIZE(known_desktop_glsl_versions
); i
++) {
206 if (known_desktop_glsl_versions
[i
] <= ctx
->Const
.GLSLVersion
) {
207 this->supported_versions
[this->num_supported_versions
].ver
208 = known_desktop_glsl_versions
[i
];
209 this->supported_versions
[this->num_supported_versions
].es
= false;
210 this->num_supported_versions
++;
214 if (ctx
->API
== API_OPENGLES2
|| ctx
->Extensions
.ARB_ES2_compatibility
) {
215 this->supported_versions
[this->num_supported_versions
].ver
= 100;
216 this->supported_versions
[this->num_supported_versions
].es
= true;
217 this->num_supported_versions
++;
219 if (_mesa_is_gles3(ctx
) || ctx
->Extensions
.ARB_ES3_compatibility
) {
220 this->supported_versions
[this->num_supported_versions
].ver
= 300;
221 this->supported_versions
[this->num_supported_versions
].es
= true;
222 this->num_supported_versions
++;
224 if (_mesa_is_gles31(ctx
)) {
225 this->supported_versions
[this->num_supported_versions
].ver
= 310;
226 this->supported_versions
[this->num_supported_versions
].es
= true;
227 this->num_supported_versions
++;
230 /* Create a string for use in error messages to tell the user which GLSL
231 * versions are supported.
233 char *supported
= ralloc_strdup(this, "");
234 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
235 unsigned ver
= this->supported_versions
[i
].ver
;
236 const char *const prefix
= (i
== 0)
238 : ((i
== this->num_supported_versions
- 1) ? ", and " : ", ");
239 const char *const suffix
= (this->supported_versions
[i
].es
) ? " ES" : "";
241 ralloc_asprintf_append(& supported
, "%s%u.%02u%s",
243 ver
/ 100, ver
% 100,
247 this->supported_version_string
= supported
;
249 if (ctx
->Const
.ForceGLSLExtensionsWarn
)
250 _mesa_glsl_process_extension("all", NULL
, "warn", NULL
, this);
252 this->default_uniform_qualifier
= new(this) ast_type_qualifier();
253 this->default_uniform_qualifier
->flags
.q
.shared
= 1;
254 this->default_uniform_qualifier
->flags
.q
.column_major
= 1;
255 this->default_uniform_qualifier
->is_default_qualifier
= true;
257 this->default_shader_storage_qualifier
= new(this) ast_type_qualifier();
258 this->default_shader_storage_qualifier
->flags
.q
.shared
= 1;
259 this->default_shader_storage_qualifier
->flags
.q
.column_major
= 1;
260 this->default_shader_storage_qualifier
->is_default_qualifier
= true;
262 this->fs_uses_gl_fragcoord
= false;
263 this->fs_redeclares_gl_fragcoord
= false;
264 this->fs_origin_upper_left
= false;
265 this->fs_pixel_center_integer
= false;
266 this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers
= false;
268 this->gs_input_prim_type_specified
= false;
269 this->tcs_output_vertices_specified
= false;
270 this->gs_input_size
= 0;
271 this->in_qualifier
= new(this) ast_type_qualifier();
272 this->out_qualifier
= new(this) ast_type_qualifier();
273 this->fs_early_fragment_tests
= false;
274 memset(this->atomic_counter_offsets
, 0,
275 sizeof(this->atomic_counter_offsets
));
276 this->allow_extension_directive_midshader
=
277 ctx
->Const
.AllowGLSLExtensionDirectiveMidShader
;
281 * Determine whether the current GLSL version is sufficiently high to support
282 * a certain feature, and generate an error message if it isn't.
284 * \param required_glsl_version and \c required_glsl_es_version are
285 * interpreted as they are in _mesa_glsl_parse_state::is_version().
287 * \param locp is the parser location where the error should be reported.
289 * \param fmt (and additional arguments) constitute a printf-style error
290 * message to report if the version check fails. Information about the
291 * current and required GLSL versions will be appended. So, for example, if
292 * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
293 * "foo unsupported") is called, the error message will be "foo unsupported in
294 * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
297 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version
,
298 unsigned required_glsl_es_version
,
299 YYLTYPE
*locp
, const char *fmt
, ...)
301 if (this->is_version(required_glsl_version
, required_glsl_es_version
))
306 char *problem
= ralloc_vasprintf(this, fmt
, args
);
308 const char *glsl_version_string
309 = glsl_compute_version_string(this, false, required_glsl_version
);
310 const char *glsl_es_version_string
311 = glsl_compute_version_string(this, true, required_glsl_es_version
);
312 const char *requirement_string
= "";
313 if (required_glsl_version
&& required_glsl_es_version
) {
314 requirement_string
= ralloc_asprintf(this, " (%s or %s required)",
316 glsl_es_version_string
);
317 } else if (required_glsl_version
) {
318 requirement_string
= ralloc_asprintf(this, " (%s required)",
319 glsl_version_string
);
320 } else if (required_glsl_es_version
) {
321 requirement_string
= ralloc_asprintf(this, " (%s required)",
322 glsl_es_version_string
);
324 _mesa_glsl_error(locp
, this, "%s in %s%s",
325 problem
, this->get_version_string(),
332 * Process a GLSL #version directive.
334 * \param version is the integer that follows the #version token.
336 * \param ident is a string identifier that follows the integer, if any is
337 * present. Otherwise NULL.
340 _mesa_glsl_parse_state::process_version_directive(YYLTYPE
*locp
, int version
,
343 bool es_token_present
= false;
345 if (strcmp(ident
, "es") == 0) {
346 es_token_present
= true;
347 } else if (version
>= 150) {
348 if (strcmp(ident
, "core") == 0) {
349 /* Accept the token. There's no need to record that this is
350 * a core profile shader since that's the only profile we support.
352 } else if (strcmp(ident
, "compatibility") == 0) {
353 _mesa_glsl_error(locp
, this,
354 "the compatibility profile is not supported");
356 _mesa_glsl_error(locp
, this,
357 "\"%s\" is not a valid shading language profile; "
358 "if present, it must be \"core\"", ident
);
361 _mesa_glsl_error(locp
, this,
362 "illegal text following version number");
366 this->es_shader
= es_token_present
;
367 if (version
== 100) {
368 if (es_token_present
) {
369 _mesa_glsl_error(locp
, this,
370 "GLSL 1.00 ES should be selected using "
373 this->es_shader
= true;
377 if (this->es_shader
) {
378 this->ARB_texture_rectangle_enable
= false;
381 if (this->forced_language_version
)
382 this->language_version
= this->forced_language_version
;
384 this->language_version
= version
;
386 bool supported
= false;
387 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
388 if (this->supported_versions
[i
].ver
== this->language_version
389 && this->supported_versions
[i
].es
== this->es_shader
) {
396 _mesa_glsl_error(locp
, this, "%s is not supported. "
397 "Supported versions are: %s",
398 this->get_version_string(),
399 this->supported_version_string
);
401 /* On exit, the language_version must be set to a valid value.
402 * Later calls to _mesa_glsl_initialize_types will misbehave if
403 * the version is invalid.
405 switch (this->ctx
->API
) {
406 case API_OPENGL_COMPAT
:
407 case API_OPENGL_CORE
:
408 this->language_version
= this->ctx
->Const
.GLSLVersion
;
412 assert(!"Should not get here.");
416 this->language_version
= 100;
423 /* This helper function will append the given message to the shader's
424 info log and report it via GL_ARB_debug_output. Per that extension,
425 'type' is one of the enum values classifying the message, and
426 'id' is the implementation-defined ID of the given message. */
428 _mesa_glsl_msg(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
429 GLenum type
, const char *fmt
, va_list ap
)
431 bool error
= (type
== MESA_DEBUG_TYPE_ERROR
);
434 assert(state
->info_log
!= NULL
);
436 /* Get the offset that the new message will be written to. */
437 int msg_offset
= strlen(state
->info_log
);
439 ralloc_asprintf_append(&state
->info_log
, "%u:%u(%u): %s: ",
443 error
? "error" : "warning");
444 ralloc_vasprintf_append(&state
->info_log
, fmt
, ap
);
446 const char *const msg
= &state
->info_log
[msg_offset
];
447 struct gl_context
*ctx
= state
->ctx
;
449 /* Report the error via GL_ARB_debug_output. */
450 _mesa_shader_debug(ctx
, type
, &msg_id
, msg
);
452 ralloc_strcat(&state
->info_log
, "\n");
456 _mesa_glsl_error(YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
457 const char *fmt
, ...)
464 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_ERROR
, fmt
, ap
);
470 _mesa_glsl_warning(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
471 const char *fmt
, ...)
476 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_OTHER
, fmt
, ap
);
482 * Enum representing the possible behaviors that can be specified in
483 * an #extension directive.
493 * Element type for _mesa_glsl_supported_extensions
495 struct _mesa_glsl_extension
{
497 * Name of the extension when referred to in a GLSL extension
502 /** True if this extension is available to desktop GL shaders */
505 /** True if this extension is available to GLES shaders */
509 * Flag in the gl_extensions struct indicating whether this
510 * extension is supported by the driver, or
511 * &gl_extensions::dummy_true if supported by all drivers.
513 * Note: the type (GLboolean gl_extensions::*) is a "pointer to
514 * member" type, the type-safe alternative to the "offsetof" macro.
517 * - foo bar::* p declares p to be an "offset" to a field of type
518 * foo that exists within struct bar
519 * - &bar::baz computes the "offset" of field baz within struct bar
520 * - x.*p accesses the field of x that exists at "offset" p
521 * - x->*p is equivalent to (*x).*p
523 const GLboolean
gl_extensions::* supported_flag
;
526 * Flag in the _mesa_glsl_parse_state struct that should be set
527 * when this extension is enabled.
529 * See note in _mesa_glsl_extension::supported_flag about "pointer
532 bool _mesa_glsl_parse_state::* enable_flag
;
535 * Flag in the _mesa_glsl_parse_state struct that should be set
536 * when the shader requests "warn" behavior for this extension.
538 * See note in _mesa_glsl_extension::supported_flag about "pointer
541 bool _mesa_glsl_parse_state::* warn_flag
;
544 bool compatible_with_state(const _mesa_glsl_parse_state
*state
) const;
545 void set_flags(_mesa_glsl_parse_state
*state
, ext_behavior behavior
) const;
548 #define EXT(NAME, GL, ES, SUPPORTED_FLAG) \
549 { "GL_" #NAME, GL, ES, &gl_extensions::SUPPORTED_FLAG, \
550 &_mesa_glsl_parse_state::NAME##_enable, \
551 &_mesa_glsl_parse_state::NAME##_warn }
554 * Table of extensions that can be enabled/disabled within a shader,
555 * and the conditions under which they are supported.
557 static const _mesa_glsl_extension _mesa_glsl_supported_extensions
[] = {
558 /* API availability */
559 /* name GL ES supported flag */
561 /* ARB extensions go here, sorted alphabetically.
563 EXT(ARB_arrays_of_arrays
, true, false, ARB_arrays_of_arrays
),
564 EXT(ARB_compute_shader
, true, false, ARB_compute_shader
),
565 EXT(ARB_conservative_depth
, true, false, ARB_conservative_depth
),
566 EXT(ARB_derivative_control
, true, false, ARB_derivative_control
),
567 EXT(ARB_draw_buffers
, true, false, dummy_true
),
568 EXT(ARB_draw_instanced
, true, false, ARB_draw_instanced
),
569 EXT(ARB_enhanced_layouts
, true, false, ARB_enhanced_layouts
),
570 EXT(ARB_explicit_attrib_location
, true, false, ARB_explicit_attrib_location
),
571 EXT(ARB_explicit_uniform_location
, true, false, ARB_explicit_uniform_location
),
572 EXT(ARB_fragment_coord_conventions
, true, false, ARB_fragment_coord_conventions
),
573 EXT(ARB_fragment_layer_viewport
, true, false, ARB_fragment_layer_viewport
),
574 EXT(ARB_gpu_shader5
, true, false, ARB_gpu_shader5
),
575 EXT(ARB_gpu_shader_fp64
, true, false, ARB_gpu_shader_fp64
),
576 EXT(ARB_sample_shading
, true, false, ARB_sample_shading
),
577 EXT(ARB_separate_shader_objects
, true, false, dummy_true
),
578 EXT(ARB_shader_atomic_counters
, true, false, ARB_shader_atomic_counters
),
579 EXT(ARB_shader_bit_encoding
, true, false, ARB_shader_bit_encoding
),
580 EXT(ARB_shader_clock
, true, false, ARB_shader_clock
),
581 EXT(ARB_shader_draw_parameters
, true, false, ARB_shader_draw_parameters
),
582 EXT(ARB_shader_image_load_store
, true, false, ARB_shader_image_load_store
),
583 EXT(ARB_shader_image_size
, true, false, ARB_shader_image_size
),
584 EXT(ARB_shader_precision
, true, false, ARB_shader_precision
),
585 EXT(ARB_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
586 EXT(ARB_shader_storage_buffer_object
, true, true, ARB_shader_storage_buffer_object
),
587 EXT(ARB_shader_subroutine
, true, false, ARB_shader_subroutine
),
588 EXT(ARB_shader_texture_image_samples
, true, false, ARB_shader_texture_image_samples
),
589 EXT(ARB_shader_texture_lod
, true, false, ARB_shader_texture_lod
),
590 EXT(ARB_shading_language_420pack
, true, false, ARB_shading_language_420pack
),
591 EXT(ARB_shading_language_packing
, true, false, ARB_shading_language_packing
),
592 EXT(ARB_tessellation_shader
, true, false, ARB_tessellation_shader
),
593 EXT(ARB_texture_cube_map_array
, true, false, ARB_texture_cube_map_array
),
594 EXT(ARB_texture_gather
, true, false, ARB_texture_gather
),
595 EXT(ARB_texture_multisample
, true, false, ARB_texture_multisample
),
596 EXT(ARB_texture_query_levels
, true, false, ARB_texture_query_levels
),
597 EXT(ARB_texture_query_lod
, true, false, ARB_texture_query_lod
),
598 EXT(ARB_texture_rectangle
, true, false, dummy_true
),
599 EXT(ARB_uniform_buffer_object
, true, false, ARB_uniform_buffer_object
),
600 EXT(ARB_vertex_attrib_64bit
, true, false, ARB_vertex_attrib_64bit
),
601 EXT(ARB_viewport_array
, true, false, ARB_viewport_array
),
603 /* KHR extensions go here, sorted alphabetically.
606 /* OES extensions go here, sorted alphabetically.
608 EXT(OES_EGL_image_external
, false, true, OES_EGL_image_external
),
609 EXT(OES_geometry_point_size
, false, true, OES_geometry_shader
),
610 EXT(OES_geometry_shader
, false, true, OES_geometry_shader
),
611 EXT(OES_gpu_shader5
, false, true, ARB_gpu_shader5
),
612 EXT(OES_shader_image_atomic
, false, true, ARB_shader_image_load_store
),
613 EXT(OES_standard_derivatives
, false, true, OES_standard_derivatives
),
614 EXT(OES_texture_3D
, false, true, dummy_true
),
615 EXT(OES_texture_storage_multisample_2d_array
, false, true, ARB_texture_multisample
),
617 /* All other extensions go here, sorted alphabetically.
619 EXT(AMD_conservative_depth
, true, false, ARB_conservative_depth
),
620 EXT(AMD_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
621 EXT(AMD_shader_trinary_minmax
, true, false, dummy_true
),
622 EXT(AMD_vertex_shader_layer
, true, false, AMD_vertex_shader_layer
),
623 EXT(AMD_vertex_shader_viewport_index
, true, false, AMD_vertex_shader_viewport_index
),
624 EXT(EXT_blend_func_extended
, false, true, ARB_blend_func_extended
),
625 EXT(EXT_draw_buffers
, false, true, dummy_true
),
626 EXT(EXT_gpu_shader5
, false, true, ARB_gpu_shader5
),
627 EXT(EXT_separate_shader_objects
, false, true, dummy_true
),
628 EXT(EXT_shader_integer_mix
, true, true, EXT_shader_integer_mix
),
629 EXT(EXT_shader_samples_identical
, true, true, EXT_shader_samples_identical
),
630 EXT(EXT_texture_array
, true, false, EXT_texture_array
),
637 * Determine whether a given extension is compatible with the target,
638 * API, and extension information in the current parser state.
640 bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state
*
643 /* Check that this extension matches whether we are compiling
644 * for desktop GL or GLES.
646 if (state
->es_shader
) {
647 if (!this->avail_in_ES
) return false;
649 if (!this->avail_in_GL
) return false;
652 /* Check that this extension is supported by the OpenGL
655 * Note: the ->* operator indexes into state->extensions by the
656 * offset this->supported_flag. See
657 * _mesa_glsl_extension::supported_flag for more info.
659 return state
->extensions
->*(this->supported_flag
);
663 * Set the appropriate flags in the parser state to establish the
664 * given behavior for this extension.
666 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state
*state
,
667 ext_behavior behavior
) const
669 /* Note: the ->* operator indexes into state by the
670 * offsets this->enable_flag and this->warn_flag. See
671 * _mesa_glsl_extension::supported_flag for more info.
673 state
->*(this->enable_flag
) = (behavior
!= extension_disable
);
674 state
->*(this->warn_flag
) = (behavior
== extension_warn
);
678 * Find an extension by name in _mesa_glsl_supported_extensions. If
679 * the name is not found, return NULL.
681 static const _mesa_glsl_extension
*find_extension(const char *name
)
683 for (unsigned i
= 0; i
< ARRAY_SIZE(_mesa_glsl_supported_extensions
); ++i
) {
684 if (strcmp(name
, _mesa_glsl_supported_extensions
[i
].name
) == 0) {
685 return &_mesa_glsl_supported_extensions
[i
];
693 _mesa_glsl_process_extension(const char *name
, YYLTYPE
*name_locp
,
694 const char *behavior_string
, YYLTYPE
*behavior_locp
,
695 _mesa_glsl_parse_state
*state
)
697 ext_behavior behavior
;
698 if (strcmp(behavior_string
, "warn") == 0) {
699 behavior
= extension_warn
;
700 } else if (strcmp(behavior_string
, "require") == 0) {
701 behavior
= extension_require
;
702 } else if (strcmp(behavior_string
, "enable") == 0) {
703 behavior
= extension_enable
;
704 } else if (strcmp(behavior_string
, "disable") == 0) {
705 behavior
= extension_disable
;
707 _mesa_glsl_error(behavior_locp
, state
,
708 "unknown extension behavior `%s'",
713 if (strcmp(name
, "all") == 0) {
714 if ((behavior
== extension_enable
) || (behavior
== extension_require
)) {
715 _mesa_glsl_error(name_locp
, state
, "cannot %s all extensions",
716 (behavior
== extension_enable
)
717 ? "enable" : "require");
721 i
< ARRAY_SIZE(_mesa_glsl_supported_extensions
); ++i
) {
722 const _mesa_glsl_extension
*extension
723 = &_mesa_glsl_supported_extensions
[i
];
724 if (extension
->compatible_with_state(state
)) {
725 _mesa_glsl_supported_extensions
[i
].set_flags(state
, behavior
);
730 const _mesa_glsl_extension
*extension
= find_extension(name
);
731 if (extension
&& extension
->compatible_with_state(state
)) {
732 extension
->set_flags(state
, behavior
);
734 static const char fmt
[] = "extension `%s' unsupported in %s shader";
736 if (behavior
== extension_require
) {
737 _mesa_glsl_error(name_locp
, state
, fmt
,
738 name
, _mesa_shader_stage_to_string(state
->stage
));
741 _mesa_glsl_warning(name_locp
, state
, fmt
,
742 name
, _mesa_shader_stage_to_string(state
->stage
));
752 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
753 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
754 * (process_array_constructor, et al) sufficient information to do type
757 * Operates on assignments involving an aggregate initializer. E.g.,
759 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
761 * or more ridiculously,
774 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
775 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
780 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
781 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
787 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
788 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
794 * This pass is necessary because the right-hand side of <type> e = { ... }
795 * doesn't contain sufficient information to determine if the types match.
798 _mesa_ast_set_aggregate_type(const glsl_type
*type
,
799 ast_expression
*expr
)
801 ast_aggregate_initializer
*ai
= (ast_aggregate_initializer
*)expr
;
802 ai
->constructor_type
= type
;
804 /* If the aggregate is an array, recursively set its elements' types. */
805 if (type
->is_array()) {
806 /* Each array element has the type type->fields.array.
808 * E.g., if <type> if struct S[2] we want to set each element's type to
811 for (exec_node
*expr_node
= ai
->expressions
.head
;
812 !expr_node
->is_tail_sentinel();
813 expr_node
= expr_node
->next
) {
814 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
817 if (expr
->oper
== ast_aggregate
)
818 _mesa_ast_set_aggregate_type(type
->fields
.array
, expr
);
821 /* If the aggregate is a struct, recursively set its fields' types. */
822 } else if (type
->is_record()) {
823 exec_node
*expr_node
= ai
->expressions
.head
;
825 /* Iterate through the struct's fields. */
826 for (unsigned i
= 0; !expr_node
->is_tail_sentinel() && i
< type
->length
;
827 i
++, expr_node
= expr_node
->next
) {
828 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
831 if (expr
->oper
== ast_aggregate
) {
832 _mesa_ast_set_aggregate_type(type
->fields
.structure
[i
].type
, expr
);
835 /* If the aggregate is a matrix, set its columns' types. */
836 } else if (type
->is_matrix()) {
837 for (exec_node
*expr_node
= ai
->expressions
.head
;
838 !expr_node
->is_tail_sentinel();
839 expr_node
= expr_node
->next
) {
840 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
843 if (expr
->oper
== ast_aggregate
)
844 _mesa_ast_set_aggregate_type(type
->column_type(), expr
);
850 _mesa_ast_process_interface_block(YYLTYPE
*locp
,
851 _mesa_glsl_parse_state
*state
,
852 ast_interface_block
*const block
,
853 const struct ast_type_qualifier
&q
)
855 if (q
.flags
.q
.buffer
) {
856 if (!state
->has_shader_storage_buffer_objects()) {
857 _mesa_glsl_error(locp
, state
,
858 "#version 430 / GL_ARB_shader_storage_buffer_object "
859 "required for defining shader storage blocks");
860 } else if (state
->ARB_shader_storage_buffer_object_warn
) {
861 _mesa_glsl_warning(locp
, state
,
862 "#version 430 / GL_ARB_shader_storage_buffer_object "
863 "required for defining shader storage blocks");
865 } else if (q
.flags
.q
.uniform
) {
866 if (!state
->has_uniform_buffer_objects()) {
867 _mesa_glsl_error(locp
, state
,
868 "#version 140 / GL_ARB_uniform_buffer_object "
869 "required for defining uniform blocks");
870 } else if (state
->ARB_uniform_buffer_object_warn
) {
871 _mesa_glsl_warning(locp
, state
,
872 "#version 140 / GL_ARB_uniform_buffer_object "
873 "required for defining uniform blocks");
876 if (state
->es_shader
|| state
->language_version
< 150) {
877 _mesa_glsl_error(locp
, state
,
878 "#version 150 required for using "
883 /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
884 * "It is illegal to have an input block in a vertex shader
885 * or an output block in a fragment shader"
887 if ((state
->stage
== MESA_SHADER_VERTEX
) && q
.flags
.q
.in
) {
888 _mesa_glsl_error(locp
, state
,
889 "`in' interface block is not allowed for "
891 } else if ((state
->stage
== MESA_SHADER_FRAGMENT
) && q
.flags
.q
.out
) {
892 _mesa_glsl_error(locp
, state
,
893 "`out' interface block is not allowed for "
894 "a fragment shader");
897 /* Since block arrays require names, and both features are added in
898 * the same language versions, we don't have to explicitly
899 * version-check both things.
901 if (block
->instance_name
!= NULL
) {
902 state
->check_version(150, 300, locp
, "interface blocks with "
903 "an instance name are not allowed");
906 uint64_t interface_type_mask
;
907 struct ast_type_qualifier temp_type_qualifier
;
909 /* Get a bitmask containing only the in/out/uniform/buffer
910 * flags, allowing us to ignore other irrelevant flags like
911 * interpolation qualifiers.
913 temp_type_qualifier
.flags
.i
= 0;
914 temp_type_qualifier
.flags
.q
.uniform
= true;
915 temp_type_qualifier
.flags
.q
.in
= true;
916 temp_type_qualifier
.flags
.q
.out
= true;
917 temp_type_qualifier
.flags
.q
.buffer
= true;
918 interface_type_mask
= temp_type_qualifier
.flags
.i
;
920 /* Get the block's interface qualifier. The interface_qualifier
921 * production rule guarantees that only one bit will be set (and
922 * it will be in/out/uniform).
924 uint64_t block_interface_qualifier
= q
.flags
.i
;
926 block
->layout
.flags
.i
|= block_interface_qualifier
;
928 if (state
->stage
== MESA_SHADER_GEOMETRY
&&
929 state
->has_explicit_attrib_stream()) {
930 /* Assign global layout's stream value. */
931 block
->layout
.flags
.q
.stream
= 1;
932 block
->layout
.flags
.q
.explicit_stream
= 0;
933 block
->layout
.stream
= state
->out_qualifier
->stream
;
936 foreach_list_typed (ast_declarator_list
, member
, link
, &block
->declarations
) {
937 ast_type_qualifier
& qualifier
= member
->type
->qualifier
;
938 if ((qualifier
.flags
.i
& interface_type_mask
) == 0) {
939 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
940 * "If no optional qualifier is used in a member declaration, the
941 * qualifier of the variable is just in, out, or uniform as declared
942 * by interface-qualifier."
944 qualifier
.flags
.i
|= block_interface_qualifier
;
945 } else if ((qualifier
.flags
.i
& interface_type_mask
) !=
946 block_interface_qualifier
) {
947 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
948 * "If optional qualifiers are used, they can include interpolation
949 * and storage qualifiers and they must declare an input, output,
950 * or uniform variable consistent with the interface qualifier of
953 _mesa_glsl_error(locp
, state
,
954 "uniform/in/out qualifier on "
955 "interface block member does not match "
956 "the interface block");
959 if (!(q
.flags
.q
.in
|| q
.flags
.q
.out
) && qualifier
.flags
.q
.invariant
)
960 _mesa_glsl_error(locp
, state
,
961 "invariant qualifiers can be used only "
962 "in interface block members for shader "
963 "inputs or outputs");
968 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier
*q
)
970 if (q
->flags
.q
.subroutine
)
971 printf("subroutine ");
973 if (q
->flags
.q
.subroutine_def
) {
974 printf("subroutine (");
975 q
->subroutine_list
->print();
979 if (q
->flags
.q
.constant
)
982 if (q
->flags
.q
.invariant
)
983 printf("invariant ");
985 if (q
->flags
.q
.attribute
)
986 printf("attribute ");
988 if (q
->flags
.q
.varying
)
991 if (q
->flags
.q
.in
&& q
->flags
.q
.out
)
1001 if (q
->flags
.q
.centroid
)
1002 printf("centroid ");
1003 if (q
->flags
.q
.sample
)
1005 if (q
->flags
.q
.patch
)
1007 if (q
->flags
.q
.uniform
)
1009 if (q
->flags
.q
.buffer
)
1011 if (q
->flags
.q
.smooth
)
1013 if (q
->flags
.q
.flat
)
1015 if (q
->flags
.q
.noperspective
)
1016 printf("noperspective ");
1021 ast_node::print(void) const
1023 printf("unhandled node ");
1027 ast_node::ast_node(void)
1029 this->location
.source
= 0;
1030 this->location
.first_line
= 0;
1031 this->location
.first_column
= 0;
1032 this->location
.last_line
= 0;
1033 this->location
.last_column
= 0;
1038 ast_opt_array_dimensions_print(const ast_array_specifier
*array_specifier
)
1040 if (array_specifier
)
1041 array_specifier
->print();
1046 ast_compound_statement::print(void) const
1050 foreach_list_typed(ast_node
, ast
, link
, &this->statements
) {
1058 ast_compound_statement::ast_compound_statement(int new_scope
,
1059 ast_node
*statements
)
1061 this->new_scope
= new_scope
;
1063 if (statements
!= NULL
) {
1064 this->statements
.push_degenerate_list_at_head(&statements
->link
);
1070 ast_expression::print(void) const
1074 case ast_mul_assign
:
1075 case ast_div_assign
:
1076 case ast_mod_assign
:
1077 case ast_add_assign
:
1078 case ast_sub_assign
:
1081 case ast_and_assign
:
1082 case ast_xor_assign
:
1084 subexpressions
[0]->print();
1085 printf("%s ", operator_string(oper
));
1086 subexpressions
[1]->print();
1089 case ast_field_selection
:
1090 subexpressions
[0]->print();
1091 printf(". %s ", primary_expression
.identifier
);
1100 printf("%s ", operator_string(oper
));
1101 subexpressions
[0]->print();
1106 subexpressions
[0]->print();
1107 printf("%s ", operator_string(oper
));
1110 case ast_conditional
:
1111 subexpressions
[0]->print();
1113 subexpressions
[1]->print();
1115 subexpressions
[2]->print();
1118 case ast_array_index
:
1119 subexpressions
[0]->print();
1121 subexpressions
[1]->print();
1125 case ast_function_call
: {
1126 subexpressions
[0]->print();
1129 foreach_list_typed (ast_node
, ast
, link
, &this->expressions
) {
1130 if (&ast
->link
!= this->expressions
.get_head())
1140 case ast_identifier
:
1141 printf("%s ", primary_expression
.identifier
);
1144 case ast_int_constant
:
1145 printf("%d ", primary_expression
.int_constant
);
1148 case ast_uint_constant
:
1149 printf("%u ", primary_expression
.uint_constant
);
1152 case ast_float_constant
:
1153 printf("%f ", primary_expression
.float_constant
);
1156 case ast_double_constant
:
1157 printf("%f ", primary_expression
.double_constant
);
1160 case ast_bool_constant
:
1162 primary_expression
.bool_constant
1163 ? "true" : "false");
1166 case ast_sequence
: {
1168 foreach_list_typed (ast_node
, ast
, link
, & this->expressions
) {
1169 if (&ast
->link
!= this->expressions
.get_head())
1178 case ast_aggregate
: {
1180 foreach_list_typed (ast_node
, ast
, link
, & this->expressions
) {
1181 if (&ast
->link
!= this->expressions
.get_head())
1196 ast_expression::ast_expression(int oper
,
1197 ast_expression
*ex0
,
1198 ast_expression
*ex1
,
1199 ast_expression
*ex2
) :
1200 primary_expression()
1202 this->oper
= ast_operators(oper
);
1203 this->subexpressions
[0] = ex0
;
1204 this->subexpressions
[1] = ex1
;
1205 this->subexpressions
[2] = ex2
;
1206 this->non_lvalue_description
= NULL
;
1211 ast_expression_statement::print(void) const
1214 expression
->print();
1220 ast_expression_statement::ast_expression_statement(ast_expression
*ex
) :
1228 ast_function::print(void) const
1230 return_type
->print();
1231 printf(" %s (", identifier
);
1233 foreach_list_typed(ast_node
, ast
, link
, & this->parameters
) {
1241 ast_function::ast_function(void)
1242 : return_type(NULL
), identifier(NULL
), is_definition(false),
1250 ast_fully_specified_type::print(void) const
1252 _mesa_ast_type_qualifier_print(& qualifier
);
1258 ast_parameter_declarator::print(void) const
1262 printf("%s ", identifier
);
1263 ast_opt_array_dimensions_print(array_specifier
);
1268 ast_function_definition::print(void) const
1276 ast_declaration::print(void) const
1278 printf("%s ", identifier
);
1279 ast_opt_array_dimensions_print(array_specifier
);
1283 initializer
->print();
1288 ast_declaration::ast_declaration(const char *identifier
,
1289 ast_array_specifier
*array_specifier
,
1290 ast_expression
*initializer
)
1292 this->identifier
= identifier
;
1293 this->array_specifier
= array_specifier
;
1294 this->initializer
= initializer
;
1299 ast_declarator_list::print(void) const
1301 assert(type
|| invariant
);
1306 printf("invariant ");
1310 foreach_list_typed (ast_node
, ast
, link
, & this->declarations
) {
1311 if (&ast
->link
!= this->declarations
.get_head())
1321 ast_declarator_list::ast_declarator_list(ast_fully_specified_type
*type
)
1324 this->invariant
= false;
1325 this->precise
= false;
1329 ast_jump_statement::print(void) const
1333 printf("continue; ");
1340 if (opt_return_value
)
1341 opt_return_value
->print();
1346 printf("discard; ");
1352 ast_jump_statement::ast_jump_statement(int mode
, ast_expression
*return_value
)
1353 : opt_return_value(NULL
)
1355 this->mode
= ast_jump_modes(mode
);
1357 if (mode
== ast_return
)
1358 opt_return_value
= return_value
;
1363 ast_selection_statement::print(void) const
1369 then_statement
->print();
1371 if (else_statement
) {
1373 else_statement
->print();
1378 ast_selection_statement::ast_selection_statement(ast_expression
*condition
,
1379 ast_node
*then_statement
,
1380 ast_node
*else_statement
)
1382 this->condition
= condition
;
1383 this->then_statement
= then_statement
;
1384 this->else_statement
= else_statement
;
1389 ast_switch_statement::print(void) const
1391 printf("switch ( ");
1392 test_expression
->print();
1399 ast_switch_statement::ast_switch_statement(ast_expression
*test_expression
,
1402 this->test_expression
= test_expression
;
1408 ast_switch_body::print(void) const
1411 if (stmts
!= NULL
) {
1418 ast_switch_body::ast_switch_body(ast_case_statement_list
*stmts
)
1420 this->stmts
= stmts
;
1424 void ast_case_label::print(void) const
1426 if (test_value
!= NULL
) {
1428 test_value
->print();
1431 printf("default: ");
1436 ast_case_label::ast_case_label(ast_expression
*test_value
)
1438 this->test_value
= test_value
;
1442 void ast_case_label_list::print(void) const
1444 foreach_list_typed(ast_node
, ast
, link
, & this->labels
) {
1451 ast_case_label_list::ast_case_label_list(void)
1456 void ast_case_statement::print(void) const
1459 foreach_list_typed(ast_node
, ast
, link
, & this->stmts
) {
1466 ast_case_statement::ast_case_statement(ast_case_label_list
*labels
)
1468 this->labels
= labels
;
1472 void ast_case_statement_list::print(void) const
1474 foreach_list_typed(ast_node
, ast
, link
, & this->cases
) {
1480 ast_case_statement_list::ast_case_statement_list(void)
1486 ast_iteration_statement::print(void) const
1492 init_statement
->print();
1499 if (rest_expression
)
1500 rest_expression
->print();
1526 ast_iteration_statement::ast_iteration_statement(int mode
,
1528 ast_node
*condition
,
1529 ast_expression
*rest_expression
,
1532 this->mode
= ast_iteration_modes(mode
);
1533 this->init_statement
= init
;
1534 this->condition
= condition
;
1535 this->rest_expression
= rest_expression
;
1541 ast_struct_specifier::print(void) const
1543 printf("struct %s { ", name
);
1544 foreach_list_typed(ast_node
, ast
, link
, &this->declarations
) {
1551 ast_struct_specifier::ast_struct_specifier(const char *identifier
,
1552 ast_declarator_list
*declarator_list
)
1554 if (identifier
== NULL
) {
1555 static mtx_t mutex
= _MTX_INITIALIZER_NP
;
1556 static unsigned anon_count
= 1;
1560 count
= anon_count
++;
1563 identifier
= ralloc_asprintf(this, "#anon_struct_%04x", count
);
1566 this->declarations
.push_degenerate_list_at_head(&declarator_list
->link
);
1567 is_declaration
= true;
1570 void ast_subroutine_list::print(void) const
1572 foreach_list_typed (ast_node
, ast
, link
, & this->declarations
) {
1573 if (&ast
->link
!= this->declarations
.get_head())
1580 set_shader_inout_layout(struct gl_shader
*shader
,
1581 struct _mesa_glsl_parse_state
*state
)
1583 /* Should have been prevented by the parser. */
1584 if (shader
->Stage
== MESA_SHADER_TESS_CTRL
) {
1585 assert(!state
->in_qualifier
->flags
.i
);
1586 } else if (shader
->Stage
== MESA_SHADER_TESS_EVAL
) {
1587 assert(!state
->out_qualifier
->flags
.i
);
1588 } else if (shader
->Stage
!= MESA_SHADER_GEOMETRY
) {
1589 assert(!state
->in_qualifier
->flags
.i
);
1590 assert(!state
->out_qualifier
->flags
.i
);
1593 if (shader
->Stage
!= MESA_SHADER_COMPUTE
) {
1594 /* Should have been prevented by the parser. */
1595 assert(!state
->cs_input_local_size_specified
);
1598 if (shader
->Stage
!= MESA_SHADER_FRAGMENT
) {
1599 /* Should have been prevented by the parser. */
1600 assert(!state
->fs_uses_gl_fragcoord
);
1601 assert(!state
->fs_redeclares_gl_fragcoord
);
1602 assert(!state
->fs_pixel_center_integer
);
1603 assert(!state
->fs_origin_upper_left
);
1604 assert(!state
->fs_early_fragment_tests
);
1607 switch (shader
->Stage
) {
1608 case MESA_SHADER_TESS_CTRL
:
1609 shader
->TessCtrl
.VerticesOut
= 0;
1610 if (state
->tcs_output_vertices_specified
) {
1612 if (state
->out_qualifier
->vertices
->
1613 process_qualifier_constant(state
, "vertices", &vertices
,
1616 YYLTYPE loc
= state
->out_qualifier
->vertices
->get_location();
1617 if (vertices
> state
->Const
.MaxPatchVertices
) {
1618 _mesa_glsl_error(&loc
, state
, "vertices (%d) exceeds "
1619 "GL_MAX_PATCH_VERTICES", vertices
);
1621 shader
->TessCtrl
.VerticesOut
= vertices
;
1625 case MESA_SHADER_TESS_EVAL
:
1626 shader
->TessEval
.PrimitiveMode
= PRIM_UNKNOWN
;
1627 if (state
->in_qualifier
->flags
.q
.prim_type
)
1628 shader
->TessEval
.PrimitiveMode
= state
->in_qualifier
->prim_type
;
1630 shader
->TessEval
.Spacing
= 0;
1631 if (state
->in_qualifier
->flags
.q
.vertex_spacing
)
1632 shader
->TessEval
.Spacing
= state
->in_qualifier
->vertex_spacing
;
1634 shader
->TessEval
.VertexOrder
= 0;
1635 if (state
->in_qualifier
->flags
.q
.ordering
)
1636 shader
->TessEval
.VertexOrder
= state
->in_qualifier
->ordering
;
1638 shader
->TessEval
.PointMode
= -1;
1639 if (state
->in_qualifier
->flags
.q
.point_mode
)
1640 shader
->TessEval
.PointMode
= state
->in_qualifier
->point_mode
;
1642 case MESA_SHADER_GEOMETRY
:
1643 shader
->Geom
.VerticesOut
= 0;
1644 if (state
->out_qualifier
->flags
.q
.max_vertices
) {
1645 unsigned qual_max_vertices
;
1646 if (state
->out_qualifier
->max_vertices
->
1647 process_qualifier_constant(state
, "max_vertices",
1648 &qual_max_vertices
, true)) {
1649 shader
->Geom
.VerticesOut
= qual_max_vertices
;
1653 if (state
->gs_input_prim_type_specified
) {
1654 shader
->Geom
.InputType
= state
->in_qualifier
->prim_type
;
1656 shader
->Geom
.InputType
= PRIM_UNKNOWN
;
1659 if (state
->out_qualifier
->flags
.q
.prim_type
) {
1660 shader
->Geom
.OutputType
= state
->out_qualifier
->prim_type
;
1662 shader
->Geom
.OutputType
= PRIM_UNKNOWN
;
1665 shader
->Geom
.Invocations
= 0;
1666 if (state
->in_qualifier
->flags
.q
.invocations
) {
1667 unsigned invocations
;
1668 if (state
->in_qualifier
->invocations
->
1669 process_qualifier_constant(state
, "invocations",
1670 &invocations
, false)) {
1672 YYLTYPE loc
= state
->in_qualifier
->invocations
->get_location();
1673 if (invocations
> MAX_GEOMETRY_SHADER_INVOCATIONS
) {
1674 _mesa_glsl_error(&loc
, state
,
1675 "invocations (%d) exceeds "
1676 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1679 shader
->Geom
.Invocations
= invocations
;
1684 case MESA_SHADER_COMPUTE
:
1685 if (state
->cs_input_local_size_specified
) {
1686 for (int i
= 0; i
< 3; i
++)
1687 shader
->Comp
.LocalSize
[i
] = state
->cs_input_local_size
[i
];
1689 for (int i
= 0; i
< 3; i
++)
1690 shader
->Comp
.LocalSize
[i
] = 0;
1694 case MESA_SHADER_FRAGMENT
:
1695 shader
->redeclares_gl_fragcoord
= state
->fs_redeclares_gl_fragcoord
;
1696 shader
->uses_gl_fragcoord
= state
->fs_uses_gl_fragcoord
;
1697 shader
->pixel_center_integer
= state
->fs_pixel_center_integer
;
1698 shader
->origin_upper_left
= state
->fs_origin_upper_left
;
1699 shader
->ARB_fragment_coord_conventions_enable
=
1700 state
->ARB_fragment_coord_conventions_enable
;
1701 shader
->EarlyFragmentTests
= state
->fs_early_fragment_tests
;
1705 /* Nothing to do. */
1713 _mesa_glsl_compile_shader(struct gl_context
*ctx
, struct gl_shader
*shader
,
1714 bool dump_ast
, bool dump_hir
)
1716 struct _mesa_glsl_parse_state
*state
=
1717 new(shader
) _mesa_glsl_parse_state(ctx
, shader
->Stage
, shader
);
1718 const char *source
= shader
->Source
;
1720 if (ctx
->Const
.GenerateTemporaryNames
)
1721 (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names
,
1724 state
->error
= glcpp_preprocess(state
, &source
, &state
->info_log
,
1725 &ctx
->Extensions
, ctx
);
1727 if (!state
->error
) {
1728 _mesa_glsl_lexer_ctor(state
, source
);
1729 _mesa_glsl_parse(state
);
1730 _mesa_glsl_lexer_dtor(state
);
1734 foreach_list_typed(ast_node
, ast
, link
, &state
->translation_unit
) {
1740 ralloc_free(shader
->ir
);
1741 shader
->ir
= new(shader
) exec_list
;
1742 if (!state
->error
&& !state
->translation_unit
.is_empty())
1743 _mesa_ast_to_hir(shader
->ir
, state
);
1745 if (!state
->error
) {
1746 validate_ir_tree(shader
->ir
);
1748 /* Print out the unoptimized IR. */
1750 _mesa_print_ir(stdout
, shader
->ir
, state
);
1755 if (!state
->error
&& !shader
->ir
->is_empty()) {
1756 struct gl_shader_compiler_options
*options
=
1757 &ctx
->Const
.ShaderCompilerOptions
[shader
->Stage
];
1759 lower_subroutine(shader
->ir
, state
);
1760 /* Do some optimization at compile time to reduce shader IR size
1761 * and reduce later work if the same shader is linked multiple times
1763 while (do_common_optimization(shader
->ir
, false, false, options
,
1764 ctx
->Const
.NativeIntegers
))
1767 validate_ir_tree(shader
->ir
);
1769 enum ir_variable_mode other
;
1770 switch (shader
->Stage
) {
1771 case MESA_SHADER_VERTEX
:
1772 other
= ir_var_shader_in
;
1774 case MESA_SHADER_FRAGMENT
:
1775 other
= ir_var_shader_out
;
1778 /* Something invalid to ensure optimize_dead_builtin_uniforms
1779 * doesn't remove anything other than uniforms or constants.
1781 other
= ir_var_mode_count
;
1785 optimize_dead_builtin_variables(shader
->ir
, other
);
1787 validate_ir_tree(shader
->ir
);
1790 if (shader
->InfoLog
)
1791 ralloc_free(shader
->InfoLog
);
1794 set_shader_inout_layout(shader
, state
);
1796 shader
->symbols
= new(shader
->ir
) glsl_symbol_table
;
1797 shader
->CompileStatus
= !state
->error
;
1798 shader
->InfoLog
= state
->info_log
;
1799 shader
->Version
= state
->language_version
;
1800 shader
->IsES
= state
->es_shader
;
1801 shader
->uses_builtin_functions
= state
->uses_builtin_functions
;
1803 /* Retain any live IR, but trash the rest. */
1804 reparent_ir(shader
->ir
, shader
->ir
);
1806 /* Destroy the symbol table. Create a new symbol table that contains only
1807 * the variables and functions that still exist in the IR. The symbol
1808 * table will be used later during linking.
1810 * There must NOT be any freed objects still referenced by the symbol
1811 * table. That could cause the linker to dereference freed memory.
1813 * We don't have to worry about types or interface-types here because those
1814 * are fly-weights that are looked up by glsl_type.
1816 foreach_in_list (ir_instruction
, ir
, shader
->ir
) {
1817 switch (ir
->ir_type
) {
1818 case ir_type_function
:
1819 shader
->symbols
->add_function((ir_function
*) ir
);
1821 case ir_type_variable
: {
1822 ir_variable
*const var
= (ir_variable
*) ir
;
1824 if (var
->data
.mode
!= ir_var_temporary
)
1825 shader
->symbols
->add_variable(var
);
1833 _mesa_glsl_initialize_derived_variables(shader
);
1835 delete state
->symbols
;
1841 * Do the set of common optimizations passes
1843 * \param ir List of instructions to be optimized
1844 * \param linked Is the shader linked? This enables
1845 * optimizations passes that remove code at
1846 * global scope and could cause linking to
1848 * \param uniform_locations_assigned Have locations already been assigned for
1849 * uniforms? This prevents the declarations
1850 * of unused uniforms from being removed.
1851 * The setting of this flag only matters if
1852 * \c linked is \c true.
1853 * \param max_unroll_iterations Maximum number of loop iterations to be
1854 * unrolled. Setting to 0 disables loop
1856 * \param options The driver's preferred shader options.
1859 do_common_optimization(exec_list
*ir
, bool linked
,
1860 bool uniform_locations_assigned
,
1861 const struct gl_shader_compiler_options
*options
,
1862 bool native_integers
)
1864 const bool debug
= false;
1865 GLboolean progress
= GL_FALSE
;
1867 #define OPT(PASS, ...) do { \
1869 fprintf(stderr, "START GLSL optimization %s\n", #PASS); \
1870 const bool opt_progress = PASS(__VA_ARGS__); \
1871 progress = opt_progress || progress; \
1873 _mesa_print_ir(stderr, ir, NULL); \
1874 fprintf(stderr, "GLSL optimization %s: %s progress\n", \
1875 #PASS, opt_progress ? "made" : "no"); \
1877 progress = PASS(__VA_ARGS__) || progress; \
1881 OPT(lower_instructions
, ir
, SUB_TO_ADD_NEG
);
1884 OPT(do_function_inlining
, ir
);
1885 OPT(do_dead_functions
, ir
);
1886 OPT(do_structure_splitting
, ir
);
1888 OPT(do_if_simplification
, ir
);
1889 OPT(opt_flatten_nested_if_blocks
, ir
);
1890 OPT(opt_conditional_discard
, ir
);
1891 OPT(do_copy_propagation
, ir
);
1892 OPT(do_copy_propagation_elements
, ir
);
1894 if (options
->OptimizeForAOS
&& !linked
)
1895 OPT(opt_flip_matrices
, ir
);
1897 if (linked
&& options
->OptimizeForAOS
) {
1898 OPT(do_vectorize
, ir
);
1902 OPT(do_dead_code
, ir
, uniform_locations_assigned
);
1904 OPT(do_dead_code_unlinked
, ir
);
1905 OPT(do_dead_code_local
, ir
);
1906 OPT(do_tree_grafting
, ir
);
1907 OPT(do_constant_propagation
, ir
);
1909 OPT(do_constant_variable
, ir
);
1911 OPT(do_constant_variable_unlinked
, ir
);
1912 OPT(do_constant_folding
, ir
);
1913 OPT(do_minmax_prune
, ir
);
1914 OPT(do_rebalance_tree
, ir
);
1915 OPT(do_algebraic
, ir
, native_integers
, options
);
1916 OPT(do_lower_jumps
, ir
);
1917 OPT(do_vec_index_to_swizzle
, ir
);
1918 OPT(lower_vector_insert
, ir
, false);
1919 OPT(do_swizzle_swizzle
, ir
);
1920 OPT(do_noop_swizzle
, ir
);
1922 OPT(optimize_split_arrays
, ir
, linked
);
1923 OPT(optimize_redundant_jumps
, ir
);
1925 loop_state
*ls
= analyze_loop_variables(ir
);
1926 if (ls
->loop_found
) {
1927 OPT(set_loop_controls
, ir
, ls
);
1928 OPT(unroll_loops
, ir
, ls
, options
);
1940 * To be called at GL teardown time, this frees compiler datastructures.
1942 * After calling this, any previously compiled shaders and shader
1943 * programs would be invalid. So this should happen at approximately
1947 _mesa_destroy_shader_compiler(void)
1949 _mesa_destroy_shader_compiler_caches();
1951 _mesa_glsl_release_types();
1955 * Releases compiler caches to trade off performance for memory.
1957 * Intended to be used with glReleaseShaderCompiler().
1960 _mesa_destroy_shader_compiler_caches(void)
1962 _mesa_glsl_release_builtin_functions();