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->Const
.MaxLights
= ctx
->Const
.MaxLights
;
90 this->Const
.MaxClipPlanes
= ctx
->Const
.MaxClipPlanes
;
91 this->Const
.MaxTextureUnits
= ctx
->Const
.MaxTextureUnits
;
92 this->Const
.MaxTextureCoords
= ctx
->Const
.MaxTextureCoordUnits
;
93 this->Const
.MaxVertexAttribs
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAttribs
;
94 this->Const
.MaxVertexUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxUniformComponents
;
95 this->Const
.MaxVertexTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
;
96 this->Const
.MaxCombinedTextureImageUnits
= ctx
->Const
.MaxCombinedTextureImageUnits
;
97 this->Const
.MaxTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
;
98 this->Const
.MaxFragmentUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxUniformComponents
;
99 this->Const
.MinProgramTexelOffset
= ctx
->Const
.MinProgramTexelOffset
;
100 this->Const
.MaxProgramTexelOffset
= ctx
->Const
.MaxProgramTexelOffset
;
102 this->Const
.MaxDrawBuffers
= ctx
->Const
.MaxDrawBuffers
;
104 this->Const
.MaxDualSourceDrawBuffers
= ctx
->Const
.MaxDualSourceDrawBuffers
;
107 this->Const
.MaxVertexOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxOutputComponents
;
108 this->Const
.MaxGeometryInputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxInputComponents
;
109 this->Const
.MaxGeometryOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxOutputComponents
;
110 this->Const
.MaxFragmentInputComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxInputComponents
;
111 this->Const
.MaxGeometryTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
;
112 this->Const
.MaxGeometryOutputVertices
= ctx
->Const
.MaxGeometryOutputVertices
;
113 this->Const
.MaxGeometryTotalOutputComponents
= ctx
->Const
.MaxGeometryTotalOutputComponents
;
114 this->Const
.MaxGeometryUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxUniformComponents
;
116 this->Const
.MaxVertexAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicCounters
;
117 this->Const
.MaxTessControlAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxAtomicCounters
;
118 this->Const
.MaxTessEvaluationAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxAtomicCounters
;
119 this->Const
.MaxGeometryAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicCounters
;
120 this->Const
.MaxFragmentAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicCounters
;
121 this->Const
.MaxComputeAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxAtomicCounters
;
122 this->Const
.MaxCombinedAtomicCounters
= ctx
->Const
.MaxCombinedAtomicCounters
;
123 this->Const
.MaxAtomicBufferBindings
= ctx
->Const
.MaxAtomicBufferBindings
;
124 this->Const
.MaxVertexAtomicCounterBuffers
=
125 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicBuffers
;
126 this->Const
.MaxTessControlAtomicCounterBuffers
=
127 ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxAtomicBuffers
;
128 this->Const
.MaxTessEvaluationAtomicCounterBuffers
=
129 ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxAtomicBuffers
;
130 this->Const
.MaxGeometryAtomicCounterBuffers
=
131 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicBuffers
;
132 this->Const
.MaxFragmentAtomicCounterBuffers
=
133 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicBuffers
;
134 this->Const
.MaxComputeAtomicCounterBuffers
=
135 ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxAtomicBuffers
;
136 this->Const
.MaxCombinedAtomicCounterBuffers
=
137 ctx
->Const
.MaxCombinedAtomicBuffers
;
138 this->Const
.MaxAtomicCounterBufferSize
=
139 ctx
->Const
.MaxAtomicBufferSize
;
141 /* ARB_enhanced_layouts constants */
142 this->Const
.MaxTransformFeedbackBuffers
= ctx
->Const
.MaxTransformFeedbackBuffers
;
143 this->Const
.MaxTransformFeedbackInterleavedComponents
= ctx
->Const
.MaxTransformFeedbackInterleavedComponents
;
145 /* Compute shader constants */
146 for (unsigned i
= 0; i
< ARRAY_SIZE(this->Const
.MaxComputeWorkGroupCount
); i
++)
147 this->Const
.MaxComputeWorkGroupCount
[i
] = ctx
->Const
.MaxComputeWorkGroupCount
[i
];
148 for (unsigned i
= 0; i
< ARRAY_SIZE(this->Const
.MaxComputeWorkGroupSize
); i
++)
149 this->Const
.MaxComputeWorkGroupSize
[i
] = ctx
->Const
.MaxComputeWorkGroupSize
[i
];
151 this->Const
.MaxComputeTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxTextureImageUnits
;
152 this->Const
.MaxComputeUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxUniformComponents
;
154 this->Const
.MaxImageUnits
= ctx
->Const
.MaxImageUnits
;
155 this->Const
.MaxCombinedShaderOutputResources
= ctx
->Const
.MaxCombinedShaderOutputResources
;
156 this->Const
.MaxImageSamples
= ctx
->Const
.MaxImageSamples
;
157 this->Const
.MaxVertexImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxImageUniforms
;
158 this->Const
.MaxTessControlImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxImageUniforms
;
159 this->Const
.MaxTessEvaluationImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxImageUniforms
;
160 this->Const
.MaxGeometryImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxImageUniforms
;
161 this->Const
.MaxFragmentImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxImageUniforms
;
162 this->Const
.MaxComputeImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_COMPUTE
].MaxImageUniforms
;
163 this->Const
.MaxCombinedImageUniforms
= ctx
->Const
.MaxCombinedImageUniforms
;
165 /* ARB_viewport_array */
166 this->Const
.MaxViewports
= ctx
->Const
.MaxViewports
;
168 /* tessellation shader constants */
169 this->Const
.MaxPatchVertices
= ctx
->Const
.MaxPatchVertices
;
170 this->Const
.MaxTessGenLevel
= ctx
->Const
.MaxTessGenLevel
;
171 this->Const
.MaxTessControlInputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxInputComponents
;
172 this->Const
.MaxTessControlOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxOutputComponents
;
173 this->Const
.MaxTessControlTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxTextureImageUnits
;
174 this->Const
.MaxTessEvaluationInputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxInputComponents
;
175 this->Const
.MaxTessEvaluationOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxOutputComponents
;
176 this->Const
.MaxTessEvaluationTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxTextureImageUnits
;
177 this->Const
.MaxTessPatchComponents
= ctx
->Const
.MaxTessPatchComponents
;
178 this->Const
.MaxTessControlTotalOutputComponents
= ctx
->Const
.MaxTessControlTotalOutputComponents
;
179 this->Const
.MaxTessControlUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxUniformComponents
;
180 this->Const
.MaxTessEvaluationUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxUniformComponents
;
182 /* GL 4.5 / OES_sample_variables */
183 this->Const
.MaxSamples
= ctx
->Const
.MaxSamples
;
185 this->current_function
= NULL
;
186 this->toplevel_ir
= NULL
;
187 this->found_return
= false;
188 this->all_invariant
= false;
189 this->user_structures
= NULL
;
190 this->num_user_structures
= 0;
191 this->num_subroutines
= 0;
192 this->subroutines
= NULL
;
193 this->num_subroutine_types
= 0;
194 this->subroutine_types
= NULL
;
196 /* supported_versions should be large enough to support the known desktop
197 * GLSL versions plus 3 GLES versions (ES 1.00, ES 3.00, and ES 3.10))
199 STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions
) + 3) ==
200 ARRAY_SIZE(this->supported_versions
));
202 /* Populate the list of supported GLSL versions */
203 /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
204 * the OpenGL 3.2 Core context is supported, this logic will need
205 * change. Older versions of GLSL are no longer supported
206 * outside the compatibility contexts of 3.x.
208 this->num_supported_versions
= 0;
209 if (_mesa_is_desktop_gl(ctx
)) {
210 for (unsigned i
= 0; i
< ARRAY_SIZE(known_desktop_glsl_versions
); i
++) {
211 if (known_desktop_glsl_versions
[i
] <= ctx
->Const
.GLSLVersion
) {
212 this->supported_versions
[this->num_supported_versions
].ver
213 = known_desktop_glsl_versions
[i
];
214 this->supported_versions
[this->num_supported_versions
].es
= false;
215 this->num_supported_versions
++;
219 if (ctx
->API
== API_OPENGLES2
|| ctx
->Extensions
.ARB_ES2_compatibility
) {
220 this->supported_versions
[this->num_supported_versions
].ver
= 100;
221 this->supported_versions
[this->num_supported_versions
].es
= true;
222 this->num_supported_versions
++;
224 if (_mesa_is_gles3(ctx
) || ctx
->Extensions
.ARB_ES3_compatibility
) {
225 this->supported_versions
[this->num_supported_versions
].ver
= 300;
226 this->supported_versions
[this->num_supported_versions
].es
= true;
227 this->num_supported_versions
++;
229 if (_mesa_is_gles31(ctx
) || ctx
->Extensions
.ARB_ES3_1_compatibility
) {
230 this->supported_versions
[this->num_supported_versions
].ver
= 310;
231 this->supported_versions
[this->num_supported_versions
].es
= true;
232 this->num_supported_versions
++;
234 if ((ctx
->API
== API_OPENGLES2
&& ctx
->Version
>= 32) ||
235 ctx
->Extensions
.ARB_ES3_2_compatibility
) {
236 this->supported_versions
[this->num_supported_versions
].ver
= 320;
237 this->supported_versions
[this->num_supported_versions
].es
= true;
238 this->num_supported_versions
++;
241 /* Create a string for use in error messages to tell the user which GLSL
242 * versions are supported.
244 char *supported
= ralloc_strdup(this, "");
245 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
246 unsigned ver
= this->supported_versions
[i
].ver
;
247 const char *const prefix
= (i
== 0)
249 : ((i
== this->num_supported_versions
- 1) ? ", and " : ", ");
250 const char *const suffix
= (this->supported_versions
[i
].es
) ? " ES" : "";
252 ralloc_asprintf_append(& supported
, "%s%u.%02u%s",
254 ver
/ 100, ver
% 100,
258 this->supported_version_string
= supported
;
260 if (ctx
->Const
.ForceGLSLExtensionsWarn
)
261 _mesa_glsl_process_extension("all", NULL
, "warn", NULL
, this);
263 this->default_uniform_qualifier
= new(this) ast_type_qualifier();
264 this->default_uniform_qualifier
->flags
.q
.shared
= 1;
265 this->default_uniform_qualifier
->flags
.q
.column_major
= 1;
266 this->default_uniform_qualifier
->is_default_qualifier
= true;
268 this->default_shader_storage_qualifier
= new(this) ast_type_qualifier();
269 this->default_shader_storage_qualifier
->flags
.q
.shared
= 1;
270 this->default_shader_storage_qualifier
->flags
.q
.column_major
= 1;
271 this->default_shader_storage_qualifier
->is_default_qualifier
= true;
273 this->fs_uses_gl_fragcoord
= false;
274 this->fs_redeclares_gl_fragcoord
= false;
275 this->fs_origin_upper_left
= false;
276 this->fs_pixel_center_integer
= false;
277 this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers
= false;
279 this->gs_input_prim_type_specified
= false;
280 this->tcs_output_vertices_specified
= false;
281 this->gs_input_size
= 0;
282 this->in_qualifier
= new(this) ast_type_qualifier();
283 this->out_qualifier
= new(this) ast_type_qualifier();
284 this->fs_early_fragment_tests
= false;
285 memset(this->atomic_counter_offsets
, 0,
286 sizeof(this->atomic_counter_offsets
));
287 this->allow_extension_directive_midshader
=
288 ctx
->Const
.AllowGLSLExtensionDirectiveMidShader
;
292 * Determine whether the current GLSL version is sufficiently high to support
293 * a certain feature, and generate an error message if it isn't.
295 * \param required_glsl_version and \c required_glsl_es_version are
296 * interpreted as they are in _mesa_glsl_parse_state::is_version().
298 * \param locp is the parser location where the error should be reported.
300 * \param fmt (and additional arguments) constitute a printf-style error
301 * message to report if the version check fails. Information about the
302 * current and required GLSL versions will be appended. So, for example, if
303 * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
304 * "foo unsupported") is called, the error message will be "foo unsupported in
305 * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
308 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version
,
309 unsigned required_glsl_es_version
,
310 YYLTYPE
*locp
, const char *fmt
, ...)
312 if (this->is_version(required_glsl_version
, required_glsl_es_version
))
317 char *problem
= ralloc_vasprintf(this, fmt
, args
);
319 const char *glsl_version_string
320 = glsl_compute_version_string(this, false, required_glsl_version
);
321 const char *glsl_es_version_string
322 = glsl_compute_version_string(this, true, required_glsl_es_version
);
323 const char *requirement_string
= "";
324 if (required_glsl_version
&& required_glsl_es_version
) {
325 requirement_string
= ralloc_asprintf(this, " (%s or %s required)",
327 glsl_es_version_string
);
328 } else if (required_glsl_version
) {
329 requirement_string
= ralloc_asprintf(this, " (%s required)",
330 glsl_version_string
);
331 } else if (required_glsl_es_version
) {
332 requirement_string
= ralloc_asprintf(this, " (%s required)",
333 glsl_es_version_string
);
335 _mesa_glsl_error(locp
, this, "%s in %s%s",
336 problem
, this->get_version_string(),
343 * Process a GLSL #version directive.
345 * \param version is the integer that follows the #version token.
347 * \param ident is a string identifier that follows the integer, if any is
348 * present. Otherwise NULL.
351 _mesa_glsl_parse_state::process_version_directive(YYLTYPE
*locp
, int version
,
354 bool es_token_present
= false;
356 if (strcmp(ident
, "es") == 0) {
357 es_token_present
= true;
358 } else if (version
>= 150) {
359 if (strcmp(ident
, "core") == 0) {
360 /* Accept the token. There's no need to record that this is
361 * a core profile shader since that's the only profile we support.
363 } else if (strcmp(ident
, "compatibility") == 0) {
364 _mesa_glsl_error(locp
, this,
365 "the compatibility profile is not supported");
367 _mesa_glsl_error(locp
, this,
368 "\"%s\" is not a valid shading language profile; "
369 "if present, it must be \"core\"", ident
);
372 _mesa_glsl_error(locp
, this,
373 "illegal text following version number");
377 this->es_shader
= es_token_present
;
378 if (version
== 100) {
379 if (es_token_present
) {
380 _mesa_glsl_error(locp
, this,
381 "GLSL 1.00 ES should be selected using "
384 this->es_shader
= true;
388 if (this->es_shader
) {
389 this->ARB_texture_rectangle_enable
= false;
392 if (this->forced_language_version
)
393 this->language_version
= this->forced_language_version
;
395 this->language_version
= version
;
397 bool supported
= false;
398 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
399 if (this->supported_versions
[i
].ver
== this->language_version
400 && this->supported_versions
[i
].es
== this->es_shader
) {
407 _mesa_glsl_error(locp
, this, "%s is not supported. "
408 "Supported versions are: %s",
409 this->get_version_string(),
410 this->supported_version_string
);
412 /* On exit, the language_version must be set to a valid value.
413 * Later calls to _mesa_glsl_initialize_types will misbehave if
414 * the version is invalid.
416 switch (this->ctx
->API
) {
417 case API_OPENGL_COMPAT
:
418 case API_OPENGL_CORE
:
419 this->language_version
= this->ctx
->Const
.GLSLVersion
;
423 assert(!"Should not get here.");
427 this->language_version
= 100;
434 /* This helper function will append the given message to the shader's
435 info log and report it via GL_ARB_debug_output. Per that extension,
436 'type' is one of the enum values classifying the message, and
437 'id' is the implementation-defined ID of the given message. */
439 _mesa_glsl_msg(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
440 GLenum type
, const char *fmt
, va_list ap
)
442 bool error
= (type
== MESA_DEBUG_TYPE_ERROR
);
445 assert(state
->info_log
!= NULL
);
447 /* Get the offset that the new message will be written to. */
448 int msg_offset
= strlen(state
->info_log
);
450 ralloc_asprintf_append(&state
->info_log
, "%u:%u(%u): %s: ",
454 error
? "error" : "warning");
455 ralloc_vasprintf_append(&state
->info_log
, fmt
, ap
);
457 const char *const msg
= &state
->info_log
[msg_offset
];
458 struct gl_context
*ctx
= state
->ctx
;
460 /* Report the error via GL_ARB_debug_output. */
461 _mesa_shader_debug(ctx
, type
, &msg_id
, msg
);
463 ralloc_strcat(&state
->info_log
, "\n");
467 _mesa_glsl_error(YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
468 const char *fmt
, ...)
475 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_ERROR
, fmt
, ap
);
481 _mesa_glsl_warning(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
482 const char *fmt
, ...)
487 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_OTHER
, fmt
, ap
);
493 * Enum representing the possible behaviors that can be specified in
494 * an #extension directive.
504 * Element type for _mesa_glsl_supported_extensions
506 struct _mesa_glsl_extension
{
508 * Name of the extension when referred to in a GLSL extension
513 /** True if this extension is available to desktop GL shaders */
516 /** True if this extension is available to GLES shaders */
520 * Flag in the gl_extensions struct indicating whether this
521 * extension is supported by the driver, or
522 * &gl_extensions::dummy_true if supported by all drivers.
524 * Note: the type (GLboolean gl_extensions::*) is a "pointer to
525 * member" type, the type-safe alternative to the "offsetof" macro.
528 * - foo bar::* p declares p to be an "offset" to a field of type
529 * foo that exists within struct bar
530 * - &bar::baz computes the "offset" of field baz within struct bar
531 * - x.*p accesses the field of x that exists at "offset" p
532 * - x->*p is equivalent to (*x).*p
534 const GLboolean
gl_extensions::* supported_flag
;
537 * Flag in the _mesa_glsl_parse_state struct that should be set
538 * when this extension is enabled.
540 * See note in _mesa_glsl_extension::supported_flag about "pointer
543 bool _mesa_glsl_parse_state::* enable_flag
;
546 * Flag in the _mesa_glsl_parse_state struct that should be set
547 * when the shader requests "warn" behavior for this extension.
549 * See note in _mesa_glsl_extension::supported_flag about "pointer
552 bool _mesa_glsl_parse_state::* warn_flag
;
555 bool compatible_with_state(const _mesa_glsl_parse_state
*state
) const;
556 void set_flags(_mesa_glsl_parse_state
*state
, ext_behavior behavior
) const;
559 #define EXT(NAME, GL, ES, SUPPORTED_FLAG) \
560 { "GL_" #NAME, GL, ES, &gl_extensions::SUPPORTED_FLAG, \
561 &_mesa_glsl_parse_state::NAME##_enable, \
562 &_mesa_glsl_parse_state::NAME##_warn }
565 * Table of extensions that can be enabled/disabled within a shader,
566 * and the conditions under which they are supported.
568 static const _mesa_glsl_extension _mesa_glsl_supported_extensions
[] = {
569 /* API availability */
570 /* name GL ES supported flag */
572 /* ARB extensions go here, sorted alphabetically.
574 EXT(ARB_ES3_1_compatibility
, true, false, ARB_ES3_1_compatibility
),
575 EXT(ARB_ES3_2_compatibility
, true, false, ARB_ES3_2_compatibility
),
576 EXT(ARB_arrays_of_arrays
, true, false, ARB_arrays_of_arrays
),
577 EXT(ARB_compute_shader
, true, false, ARB_compute_shader
),
578 EXT(ARB_conservative_depth
, true, false, ARB_conservative_depth
),
579 EXT(ARB_cull_distance
, true, false, ARB_cull_distance
),
580 EXT(ARB_derivative_control
, true, false, ARB_derivative_control
),
581 EXT(ARB_draw_buffers
, true, false, dummy_true
),
582 EXT(ARB_draw_instanced
, true, false, ARB_draw_instanced
),
583 EXT(ARB_enhanced_layouts
, true, false, ARB_enhanced_layouts
),
584 EXT(ARB_explicit_attrib_location
, true, false, ARB_explicit_attrib_location
),
585 EXT(ARB_explicit_uniform_location
, true, false, ARB_explicit_uniform_location
),
586 EXT(ARB_fragment_coord_conventions
, true, false, ARB_fragment_coord_conventions
),
587 EXT(ARB_fragment_layer_viewport
, true, false, ARB_fragment_layer_viewport
),
588 EXT(ARB_gpu_shader5
, true, false, ARB_gpu_shader5
),
589 EXT(ARB_gpu_shader_fp64
, true, false, ARB_gpu_shader_fp64
),
590 EXT(ARB_sample_shading
, true, false, ARB_sample_shading
),
591 EXT(ARB_separate_shader_objects
, true, false, dummy_true
),
592 EXT(ARB_shader_atomic_counter_ops
, true, false, ARB_shader_atomic_counter_ops
),
593 EXT(ARB_shader_atomic_counters
, true, false, ARB_shader_atomic_counters
),
594 EXT(ARB_shader_bit_encoding
, true, false, ARB_shader_bit_encoding
),
595 EXT(ARB_shader_clock
, true, false, ARB_shader_clock
),
596 EXT(ARB_shader_draw_parameters
, true, false, ARB_shader_draw_parameters
),
597 EXT(ARB_shader_group_vote
, true, false, ARB_shader_group_vote
),
598 EXT(ARB_shader_image_load_store
, true, false, ARB_shader_image_load_store
),
599 EXT(ARB_shader_image_size
, true, false, ARB_shader_image_size
),
600 EXT(ARB_shader_precision
, true, false, ARB_shader_precision
),
601 EXT(ARB_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
602 EXT(ARB_shader_storage_buffer_object
, true, true, ARB_shader_storage_buffer_object
),
603 EXT(ARB_shader_subroutine
, true, false, ARB_shader_subroutine
),
604 EXT(ARB_shader_texture_image_samples
, true, false, ARB_shader_texture_image_samples
),
605 EXT(ARB_shader_texture_lod
, true, false, ARB_shader_texture_lod
),
606 EXT(ARB_shading_language_420pack
, true, false, ARB_shading_language_420pack
),
607 EXT(ARB_shading_language_packing
, true, false, ARB_shading_language_packing
),
608 EXT(ARB_tessellation_shader
, true, false, ARB_tessellation_shader
),
609 EXT(ARB_texture_cube_map_array
, true, false, ARB_texture_cube_map_array
),
610 EXT(ARB_texture_gather
, true, false, ARB_texture_gather
),
611 EXT(ARB_texture_multisample
, true, false, ARB_texture_multisample
),
612 EXT(ARB_texture_query_levels
, true, false, ARB_texture_query_levels
),
613 EXT(ARB_texture_query_lod
, true, false, ARB_texture_query_lod
),
614 EXT(ARB_texture_rectangle
, true, false, dummy_true
),
615 EXT(ARB_uniform_buffer_object
, true, false, ARB_uniform_buffer_object
),
616 EXT(ARB_vertex_attrib_64bit
, true, false, ARB_vertex_attrib_64bit
),
617 EXT(ARB_viewport_array
, true, false, ARB_viewport_array
),
619 /* KHR extensions go here, sorted alphabetically.
622 /* OES extensions go here, sorted alphabetically.
624 EXT(OES_EGL_image_external
, false, true, OES_EGL_image_external
),
625 EXT(OES_geometry_point_size
, false, true, OES_geometry_shader
),
626 EXT(OES_geometry_shader
, false, true, OES_geometry_shader
),
627 EXT(OES_gpu_shader5
, false, true, ARB_gpu_shader5
),
628 EXT(OES_sample_variables
, false, true, OES_sample_variables
),
629 EXT(OES_shader_image_atomic
, false, true, ARB_shader_image_load_store
),
630 EXT(OES_shader_io_blocks
, false, true, OES_shader_io_blocks
),
631 EXT(OES_shader_multisample_interpolation
, false, true, OES_sample_variables
),
632 EXT(OES_standard_derivatives
, false, true, OES_standard_derivatives
),
633 EXT(OES_texture_3D
, false, true, dummy_true
),
634 EXT(OES_texture_buffer
, false, true, OES_texture_buffer
),
635 EXT(OES_texture_storage_multisample_2d_array
, false, true, ARB_texture_multisample
),
637 /* All other extensions go here, sorted alphabetically.
639 EXT(AMD_conservative_depth
, true, false, ARB_conservative_depth
),
640 EXT(AMD_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
641 EXT(AMD_shader_trinary_minmax
, true, false, dummy_true
),
642 EXT(AMD_vertex_shader_layer
, true, false, AMD_vertex_shader_layer
),
643 EXT(AMD_vertex_shader_viewport_index
, true, false, AMD_vertex_shader_viewport_index
),
644 EXT(EXT_blend_func_extended
, false, true, ARB_blend_func_extended
),
645 EXT(EXT_draw_buffers
, false, true, dummy_true
),
646 EXT(EXT_clip_cull_distance
, false, true, ARB_cull_distance
),
647 EXT(EXT_gpu_shader5
, false, true, ARB_gpu_shader5
),
648 EXT(EXT_separate_shader_objects
, false, true, dummy_true
),
649 EXT(EXT_shader_integer_mix
, true, true, EXT_shader_integer_mix
),
650 EXT(EXT_shader_io_blocks
, false, true, OES_shader_io_blocks
),
651 EXT(EXT_shader_samples_identical
, true, true, EXT_shader_samples_identical
),
652 EXT(EXT_texture_array
, true, false, EXT_texture_array
),
653 EXT(EXT_texture_buffer
, false, true, OES_texture_buffer
),
660 * Determine whether a given extension is compatible with the target,
661 * API, and extension information in the current parser state.
663 bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state
*
666 /* Check that this extension matches whether we are compiling
667 * for desktop GL or GLES.
669 if (state
->es_shader
) {
670 if (!this->avail_in_ES
) return false;
672 if (!this->avail_in_GL
) return false;
675 /* Check that this extension is supported by the OpenGL
678 * Note: the ->* operator indexes into state->extensions by the
679 * offset this->supported_flag. See
680 * _mesa_glsl_extension::supported_flag for more info.
682 return state
->extensions
->*(this->supported_flag
);
686 * Set the appropriate flags in the parser state to establish the
687 * given behavior for this extension.
689 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state
*state
,
690 ext_behavior behavior
) const
692 /* Note: the ->* operator indexes into state by the
693 * offsets this->enable_flag and this->warn_flag. See
694 * _mesa_glsl_extension::supported_flag for more info.
696 state
->*(this->enable_flag
) = (behavior
!= extension_disable
);
697 state
->*(this->warn_flag
) = (behavior
== extension_warn
);
701 * Find an extension by name in _mesa_glsl_supported_extensions. If
702 * the name is not found, return NULL.
704 static const _mesa_glsl_extension
*find_extension(const char *name
)
706 for (unsigned i
= 0; i
< ARRAY_SIZE(_mesa_glsl_supported_extensions
); ++i
) {
707 if (strcmp(name
, _mesa_glsl_supported_extensions
[i
].name
) == 0) {
708 return &_mesa_glsl_supported_extensions
[i
];
716 _mesa_glsl_process_extension(const char *name
, YYLTYPE
*name_locp
,
717 const char *behavior_string
, YYLTYPE
*behavior_locp
,
718 _mesa_glsl_parse_state
*state
)
720 ext_behavior behavior
;
721 if (strcmp(behavior_string
, "warn") == 0) {
722 behavior
= extension_warn
;
723 } else if (strcmp(behavior_string
, "require") == 0) {
724 behavior
= extension_require
;
725 } else if (strcmp(behavior_string
, "enable") == 0) {
726 behavior
= extension_enable
;
727 } else if (strcmp(behavior_string
, "disable") == 0) {
728 behavior
= extension_disable
;
730 _mesa_glsl_error(behavior_locp
, state
,
731 "unknown extension behavior `%s'",
736 if (strcmp(name
, "all") == 0) {
737 if ((behavior
== extension_enable
) || (behavior
== extension_require
)) {
738 _mesa_glsl_error(name_locp
, state
, "cannot %s all extensions",
739 (behavior
== extension_enable
)
740 ? "enable" : "require");
744 i
< ARRAY_SIZE(_mesa_glsl_supported_extensions
); ++i
) {
745 const _mesa_glsl_extension
*extension
746 = &_mesa_glsl_supported_extensions
[i
];
747 if (extension
->compatible_with_state(state
)) {
748 _mesa_glsl_supported_extensions
[i
].set_flags(state
, behavior
);
753 const _mesa_glsl_extension
*extension
= find_extension(name
);
754 if (extension
&& extension
->compatible_with_state(state
)) {
755 extension
->set_flags(state
, behavior
);
757 static const char fmt
[] = "extension `%s' unsupported in %s shader";
759 if (behavior
== extension_require
) {
760 _mesa_glsl_error(name_locp
, state
, fmt
,
761 name
, _mesa_shader_stage_to_string(state
->stage
));
764 _mesa_glsl_warning(name_locp
, state
, fmt
,
765 name
, _mesa_shader_stage_to_string(state
->stage
));
775 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
776 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
777 * (process_array_constructor, et al) sufficient information to do type
780 * Operates on assignments involving an aggregate initializer. E.g.,
782 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
784 * or more ridiculously,
797 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
798 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
803 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
804 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
810 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
811 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
817 * This pass is necessary because the right-hand side of <type> e = { ... }
818 * doesn't contain sufficient information to determine if the types match.
821 _mesa_ast_set_aggregate_type(const glsl_type
*type
,
822 ast_expression
*expr
)
824 ast_aggregate_initializer
*ai
= (ast_aggregate_initializer
*)expr
;
825 ai
->constructor_type
= type
;
827 /* If the aggregate is an array, recursively set its elements' types. */
828 if (type
->is_array()) {
829 /* Each array element has the type type->fields.array.
831 * E.g., if <type> if struct S[2] we want to set each element's type to
834 for (exec_node
*expr_node
= ai
->expressions
.head
;
835 !expr_node
->is_tail_sentinel();
836 expr_node
= expr_node
->next
) {
837 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
840 if (expr
->oper
== ast_aggregate
)
841 _mesa_ast_set_aggregate_type(type
->fields
.array
, expr
);
844 /* If the aggregate is a struct, recursively set its fields' types. */
845 } else if (type
->is_record()) {
846 exec_node
*expr_node
= ai
->expressions
.head
;
848 /* Iterate through the struct's fields. */
849 for (unsigned i
= 0; !expr_node
->is_tail_sentinel() && i
< type
->length
;
850 i
++, expr_node
= expr_node
->next
) {
851 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
854 if (expr
->oper
== ast_aggregate
) {
855 _mesa_ast_set_aggregate_type(type
->fields
.structure
[i
].type
, expr
);
858 /* If the aggregate is a matrix, set its columns' types. */
859 } else if (type
->is_matrix()) {
860 for (exec_node
*expr_node
= ai
->expressions
.head
;
861 !expr_node
->is_tail_sentinel();
862 expr_node
= expr_node
->next
) {
863 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
866 if (expr
->oper
== ast_aggregate
)
867 _mesa_ast_set_aggregate_type(type
->column_type(), expr
);
873 _mesa_ast_process_interface_block(YYLTYPE
*locp
,
874 _mesa_glsl_parse_state
*state
,
875 ast_interface_block
*const block
,
876 const struct ast_type_qualifier
&q
)
878 if (q
.flags
.q
.buffer
) {
879 if (!state
->has_shader_storage_buffer_objects()) {
880 _mesa_glsl_error(locp
, state
,
881 "#version 430 / GL_ARB_shader_storage_buffer_object "
882 "required for defining shader storage blocks");
883 } else if (state
->ARB_shader_storage_buffer_object_warn
) {
884 _mesa_glsl_warning(locp
, state
,
885 "#version 430 / GL_ARB_shader_storage_buffer_object "
886 "required for defining shader storage blocks");
888 } else if (q
.flags
.q
.uniform
) {
889 if (!state
->has_uniform_buffer_objects()) {
890 _mesa_glsl_error(locp
, state
,
891 "#version 140 / GL_ARB_uniform_buffer_object "
892 "required for defining uniform blocks");
893 } else if (state
->ARB_uniform_buffer_object_warn
) {
894 _mesa_glsl_warning(locp
, state
,
895 "#version 140 / GL_ARB_uniform_buffer_object "
896 "required for defining uniform blocks");
899 if (!state
->has_shader_io_blocks()) {
900 if (state
->es_shader
) {
901 _mesa_glsl_error(locp
, state
,
902 "GL_OES_shader_io_blocks or #version 320 "
903 "required for using interface blocks");
905 _mesa_glsl_error(locp
, state
,
906 "#version 150 required for using "
912 /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
913 * "It is illegal to have an input block in a vertex shader
914 * or an output block in a fragment shader"
916 if ((state
->stage
== MESA_SHADER_VERTEX
) && q
.flags
.q
.in
) {
917 _mesa_glsl_error(locp
, state
,
918 "`in' interface block is not allowed for "
920 } else if ((state
->stage
== MESA_SHADER_FRAGMENT
) && q
.flags
.q
.out
) {
921 _mesa_glsl_error(locp
, state
,
922 "`out' interface block is not allowed for "
923 "a fragment shader");
926 /* Since block arrays require names, and both features are added in
927 * the same language versions, we don't have to explicitly
928 * version-check both things.
930 if (block
->instance_name
!= NULL
) {
931 state
->check_version(150, 300, locp
, "interface blocks with "
932 "an instance name are not allowed");
935 uint64_t interface_type_mask
;
936 struct ast_type_qualifier temp_type_qualifier
;
938 /* Get a bitmask containing only the in/out/uniform/buffer
939 * flags, allowing us to ignore other irrelevant flags like
940 * interpolation qualifiers.
942 temp_type_qualifier
.flags
.i
= 0;
943 temp_type_qualifier
.flags
.q
.uniform
= true;
944 temp_type_qualifier
.flags
.q
.in
= true;
945 temp_type_qualifier
.flags
.q
.out
= true;
946 temp_type_qualifier
.flags
.q
.buffer
= true;
947 interface_type_mask
= temp_type_qualifier
.flags
.i
;
949 /* Get the block's interface qualifier. The interface_qualifier
950 * production rule guarantees that only one bit will be set (and
951 * it will be in/out/uniform).
953 uint64_t block_interface_qualifier
= q
.flags
.i
;
955 block
->layout
.flags
.i
|= block_interface_qualifier
;
957 if (state
->stage
== MESA_SHADER_GEOMETRY
&&
958 state
->has_explicit_attrib_stream() &&
959 block
->layout
.flags
.q
.out
) {
960 /* Assign global layout's stream value. */
961 block
->layout
.flags
.q
.stream
= 1;
962 block
->layout
.flags
.q
.explicit_stream
= 0;
963 block
->layout
.stream
= state
->out_qualifier
->stream
;
966 if (state
->has_enhanced_layouts() && block
->layout
.flags
.q
.out
) {
967 /* Assign global layout's xfb_buffer value. */
968 block
->layout
.flags
.q
.xfb_buffer
= 1;
969 block
->layout
.flags
.q
.explicit_xfb_buffer
= 0;
970 block
->layout
.xfb_buffer
= state
->out_qualifier
->xfb_buffer
;
973 foreach_list_typed (ast_declarator_list
, member
, link
, &block
->declarations
) {
974 ast_type_qualifier
& qualifier
= member
->type
->qualifier
;
975 if ((qualifier
.flags
.i
& interface_type_mask
) == 0) {
976 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
977 * "If no optional qualifier is used in a member declaration, the
978 * qualifier of the variable is just in, out, or uniform as declared
979 * by interface-qualifier."
981 qualifier
.flags
.i
|= block_interface_qualifier
;
982 } else if ((qualifier
.flags
.i
& interface_type_mask
) !=
983 block_interface_qualifier
) {
984 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
985 * "If optional qualifiers are used, they can include interpolation
986 * and storage qualifiers and they must declare an input, output,
987 * or uniform variable consistent with the interface qualifier of
990 _mesa_glsl_error(locp
, state
,
991 "uniform/in/out qualifier on "
992 "interface block member does not match "
993 "the interface block");
996 if (!(q
.flags
.q
.in
|| q
.flags
.q
.out
) && qualifier
.flags
.q
.invariant
)
997 _mesa_glsl_error(locp
, state
,
998 "invariant qualifiers can be used only "
999 "in interface block members for shader "
1000 "inputs or outputs");
1005 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier
*q
)
1007 if (q
->flags
.q
.subroutine
)
1008 printf("subroutine ");
1010 if (q
->flags
.q
.subroutine_def
) {
1011 printf("subroutine (");
1012 q
->subroutine_list
->print();
1016 if (q
->flags
.q
.constant
)
1019 if (q
->flags
.q
.invariant
)
1020 printf("invariant ");
1022 if (q
->flags
.q
.attribute
)
1023 printf("attribute ");
1025 if (q
->flags
.q
.varying
)
1028 if (q
->flags
.q
.in
&& q
->flags
.q
.out
)
1038 if (q
->flags
.q
.centroid
)
1039 printf("centroid ");
1040 if (q
->flags
.q
.sample
)
1042 if (q
->flags
.q
.patch
)
1044 if (q
->flags
.q
.uniform
)
1046 if (q
->flags
.q
.buffer
)
1048 if (q
->flags
.q
.smooth
)
1050 if (q
->flags
.q
.flat
)
1052 if (q
->flags
.q
.noperspective
)
1053 printf("noperspective ");
1058 ast_node::print(void) const
1060 printf("unhandled node ");
1064 ast_node::ast_node(void)
1066 this->location
.source
= 0;
1067 this->location
.first_line
= 0;
1068 this->location
.first_column
= 0;
1069 this->location
.last_line
= 0;
1070 this->location
.last_column
= 0;
1075 ast_opt_array_dimensions_print(const ast_array_specifier
*array_specifier
)
1077 if (array_specifier
)
1078 array_specifier
->print();
1083 ast_compound_statement::print(void) const
1087 foreach_list_typed(ast_node
, ast
, link
, &this->statements
) {
1095 ast_compound_statement::ast_compound_statement(int new_scope
,
1096 ast_node
*statements
)
1098 this->new_scope
= new_scope
;
1100 if (statements
!= NULL
) {
1101 this->statements
.push_degenerate_list_at_head(&statements
->link
);
1107 ast_expression::print(void) const
1111 case ast_mul_assign
:
1112 case ast_div_assign
:
1113 case ast_mod_assign
:
1114 case ast_add_assign
:
1115 case ast_sub_assign
:
1118 case ast_and_assign
:
1119 case ast_xor_assign
:
1121 subexpressions
[0]->print();
1122 printf("%s ", operator_string(oper
));
1123 subexpressions
[1]->print();
1126 case ast_field_selection
:
1127 subexpressions
[0]->print();
1128 printf(". %s ", primary_expression
.identifier
);
1137 printf("%s ", operator_string(oper
));
1138 subexpressions
[0]->print();
1143 subexpressions
[0]->print();
1144 printf("%s ", operator_string(oper
));
1147 case ast_conditional
:
1148 subexpressions
[0]->print();
1150 subexpressions
[1]->print();
1152 subexpressions
[2]->print();
1155 case ast_array_index
:
1156 subexpressions
[0]->print();
1158 subexpressions
[1]->print();
1162 case ast_function_call
: {
1163 subexpressions
[0]->print();
1166 foreach_list_typed (ast_node
, ast
, link
, &this->expressions
) {
1167 if (&ast
->link
!= this->expressions
.get_head())
1177 case ast_identifier
:
1178 printf("%s ", primary_expression
.identifier
);
1181 case ast_int_constant
:
1182 printf("%d ", primary_expression
.int_constant
);
1185 case ast_uint_constant
:
1186 printf("%u ", primary_expression
.uint_constant
);
1189 case ast_float_constant
:
1190 printf("%f ", primary_expression
.float_constant
);
1193 case ast_double_constant
:
1194 printf("%f ", primary_expression
.double_constant
);
1197 case ast_bool_constant
:
1199 primary_expression
.bool_constant
1200 ? "true" : "false");
1203 case ast_sequence
: {
1205 foreach_list_typed (ast_node
, ast
, link
, & this->expressions
) {
1206 if (&ast
->link
!= this->expressions
.get_head())
1215 case ast_aggregate
: {
1217 foreach_list_typed (ast_node
, ast
, link
, & this->expressions
) {
1218 if (&ast
->link
!= this->expressions
.get_head())
1233 ast_expression::ast_expression(int oper
,
1234 ast_expression
*ex0
,
1235 ast_expression
*ex1
,
1236 ast_expression
*ex2
) :
1237 primary_expression()
1239 this->oper
= ast_operators(oper
);
1240 this->subexpressions
[0] = ex0
;
1241 this->subexpressions
[1] = ex1
;
1242 this->subexpressions
[2] = ex2
;
1243 this->non_lvalue_description
= NULL
;
1244 this->is_lhs
= false;
1249 ast_expression_statement::print(void) const
1252 expression
->print();
1258 ast_expression_statement::ast_expression_statement(ast_expression
*ex
) :
1266 ast_function::print(void) const
1268 return_type
->print();
1269 printf(" %s (", identifier
);
1271 foreach_list_typed(ast_node
, ast
, link
, & this->parameters
) {
1279 ast_function::ast_function(void)
1280 : return_type(NULL
), identifier(NULL
), is_definition(false),
1288 ast_fully_specified_type::print(void) const
1290 _mesa_ast_type_qualifier_print(& qualifier
);
1296 ast_parameter_declarator::print(void) const
1300 printf("%s ", identifier
);
1301 ast_opt_array_dimensions_print(array_specifier
);
1306 ast_function_definition::print(void) const
1314 ast_declaration::print(void) const
1316 printf("%s ", identifier
);
1317 ast_opt_array_dimensions_print(array_specifier
);
1321 initializer
->print();
1326 ast_declaration::ast_declaration(const char *identifier
,
1327 ast_array_specifier
*array_specifier
,
1328 ast_expression
*initializer
)
1330 this->identifier
= identifier
;
1331 this->array_specifier
= array_specifier
;
1332 this->initializer
= initializer
;
1337 ast_declarator_list::print(void) const
1339 assert(type
|| invariant
);
1344 printf("invariant ");
1348 foreach_list_typed (ast_node
, ast
, link
, & this->declarations
) {
1349 if (&ast
->link
!= this->declarations
.get_head())
1359 ast_declarator_list::ast_declarator_list(ast_fully_specified_type
*type
)
1362 this->invariant
= false;
1363 this->precise
= false;
1367 ast_jump_statement::print(void) const
1371 printf("continue; ");
1378 if (opt_return_value
)
1379 opt_return_value
->print();
1384 printf("discard; ");
1390 ast_jump_statement::ast_jump_statement(int mode
, ast_expression
*return_value
)
1391 : opt_return_value(NULL
)
1393 this->mode
= ast_jump_modes(mode
);
1395 if (mode
== ast_return
)
1396 opt_return_value
= return_value
;
1401 ast_selection_statement::print(void) const
1407 then_statement
->print();
1409 if (else_statement
) {
1411 else_statement
->print();
1416 ast_selection_statement::ast_selection_statement(ast_expression
*condition
,
1417 ast_node
*then_statement
,
1418 ast_node
*else_statement
)
1420 this->condition
= condition
;
1421 this->then_statement
= then_statement
;
1422 this->else_statement
= else_statement
;
1427 ast_switch_statement::print(void) const
1429 printf("switch ( ");
1430 test_expression
->print();
1437 ast_switch_statement::ast_switch_statement(ast_expression
*test_expression
,
1440 this->test_expression
= test_expression
;
1446 ast_switch_body::print(void) const
1449 if (stmts
!= NULL
) {
1456 ast_switch_body::ast_switch_body(ast_case_statement_list
*stmts
)
1458 this->stmts
= stmts
;
1462 void ast_case_label::print(void) const
1464 if (test_value
!= NULL
) {
1466 test_value
->print();
1469 printf("default: ");
1474 ast_case_label::ast_case_label(ast_expression
*test_value
)
1476 this->test_value
= test_value
;
1480 void ast_case_label_list::print(void) const
1482 foreach_list_typed(ast_node
, ast
, link
, & this->labels
) {
1489 ast_case_label_list::ast_case_label_list(void)
1494 void ast_case_statement::print(void) const
1497 foreach_list_typed(ast_node
, ast
, link
, & this->stmts
) {
1504 ast_case_statement::ast_case_statement(ast_case_label_list
*labels
)
1506 this->labels
= labels
;
1510 void ast_case_statement_list::print(void) const
1512 foreach_list_typed(ast_node
, ast
, link
, & this->cases
) {
1518 ast_case_statement_list::ast_case_statement_list(void)
1524 ast_iteration_statement::print(void) const
1530 init_statement
->print();
1537 if (rest_expression
)
1538 rest_expression
->print();
1564 ast_iteration_statement::ast_iteration_statement(int mode
,
1566 ast_node
*condition
,
1567 ast_expression
*rest_expression
,
1570 this->mode
= ast_iteration_modes(mode
);
1571 this->init_statement
= init
;
1572 this->condition
= condition
;
1573 this->rest_expression
= rest_expression
;
1579 ast_struct_specifier::print(void) const
1581 printf("struct %s { ", name
);
1582 foreach_list_typed(ast_node
, ast
, link
, &this->declarations
) {
1589 ast_struct_specifier::ast_struct_specifier(const char *identifier
,
1590 ast_declarator_list
*declarator_list
)
1592 if (identifier
== NULL
) {
1593 static mtx_t mutex
= _MTX_INITIALIZER_NP
;
1594 static unsigned anon_count
= 1;
1598 count
= anon_count
++;
1601 identifier
= ralloc_asprintf(this, "#anon_struct_%04x", count
);
1604 this->declarations
.push_degenerate_list_at_head(&declarator_list
->link
);
1605 is_declaration
= true;
1609 void ast_subroutine_list::print(void) const
1611 foreach_list_typed (ast_node
, ast
, link
, & this->declarations
) {
1612 if (&ast
->link
!= this->declarations
.get_head())
1619 set_shader_inout_layout(struct gl_shader
*shader
,
1620 struct _mesa_glsl_parse_state
*state
)
1622 /* Should have been prevented by the parser. */
1623 if (shader
->Stage
== MESA_SHADER_TESS_CTRL
||
1624 shader
->Stage
== MESA_SHADER_VERTEX
) {
1625 assert(!state
->in_qualifier
->flags
.i
);
1626 } else if (shader
->Stage
!= MESA_SHADER_GEOMETRY
&&
1627 shader
->Stage
!= MESA_SHADER_TESS_EVAL
) {
1628 assert(!state
->in_qualifier
->flags
.i
);
1631 if (shader
->Stage
!= MESA_SHADER_COMPUTE
) {
1632 /* Should have been prevented by the parser. */
1633 assert(!state
->cs_input_local_size_specified
);
1636 if (shader
->Stage
!= MESA_SHADER_FRAGMENT
) {
1637 /* Should have been prevented by the parser. */
1638 assert(!state
->fs_uses_gl_fragcoord
);
1639 assert(!state
->fs_redeclares_gl_fragcoord
);
1640 assert(!state
->fs_pixel_center_integer
);
1641 assert(!state
->fs_origin_upper_left
);
1642 assert(!state
->fs_early_fragment_tests
);
1645 for (unsigned i
= 0; i
< MAX_FEEDBACK_BUFFERS
; i
++) {
1646 if (state
->out_qualifier
->out_xfb_stride
[i
]) {
1647 unsigned xfb_stride
;
1648 if (state
->out_qualifier
->out_xfb_stride
[i
]->
1649 process_qualifier_constant(state
, "xfb_stride", &xfb_stride
,
1651 shader
->TransformFeedback
.BufferStride
[i
] = xfb_stride
;
1656 switch (shader
->Stage
) {
1657 case MESA_SHADER_TESS_CTRL
:
1658 shader
->TessCtrl
.VerticesOut
= 0;
1659 if (state
->tcs_output_vertices_specified
) {
1661 if (state
->out_qualifier
->vertices
->
1662 process_qualifier_constant(state
, "vertices", &vertices
,
1665 YYLTYPE loc
= state
->out_qualifier
->vertices
->get_location();
1666 if (vertices
> state
->Const
.MaxPatchVertices
) {
1667 _mesa_glsl_error(&loc
, state
, "vertices (%d) exceeds "
1668 "GL_MAX_PATCH_VERTICES", vertices
);
1670 shader
->TessCtrl
.VerticesOut
= vertices
;
1674 case MESA_SHADER_TESS_EVAL
:
1675 shader
->TessEval
.PrimitiveMode
= PRIM_UNKNOWN
;
1676 if (state
->in_qualifier
->flags
.q
.prim_type
)
1677 shader
->TessEval
.PrimitiveMode
= state
->in_qualifier
->prim_type
;
1679 shader
->TessEval
.Spacing
= 0;
1680 if (state
->in_qualifier
->flags
.q
.vertex_spacing
)
1681 shader
->TessEval
.Spacing
= state
->in_qualifier
->vertex_spacing
;
1683 shader
->TessEval
.VertexOrder
= 0;
1684 if (state
->in_qualifier
->flags
.q
.ordering
)
1685 shader
->TessEval
.VertexOrder
= state
->in_qualifier
->ordering
;
1687 shader
->TessEval
.PointMode
= -1;
1688 if (state
->in_qualifier
->flags
.q
.point_mode
)
1689 shader
->TessEval
.PointMode
= state
->in_qualifier
->point_mode
;
1691 case MESA_SHADER_GEOMETRY
:
1692 shader
->Geom
.VerticesOut
= -1;
1693 if (state
->out_qualifier
->flags
.q
.max_vertices
) {
1694 unsigned qual_max_vertices
;
1695 if (state
->out_qualifier
->max_vertices
->
1696 process_qualifier_constant(state
, "max_vertices",
1697 &qual_max_vertices
, true, true)) {
1699 if (qual_max_vertices
> state
->Const
.MaxGeometryOutputVertices
) {
1700 YYLTYPE loc
= state
->out_qualifier
->max_vertices
->get_location();
1701 _mesa_glsl_error(&loc
, state
,
1702 "maximum output vertices (%d) exceeds "
1703 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1706 shader
->Geom
.VerticesOut
= qual_max_vertices
;
1710 if (state
->gs_input_prim_type_specified
) {
1711 shader
->Geom
.InputType
= state
->in_qualifier
->prim_type
;
1713 shader
->Geom
.InputType
= PRIM_UNKNOWN
;
1716 if (state
->out_qualifier
->flags
.q
.prim_type
) {
1717 shader
->Geom
.OutputType
= state
->out_qualifier
->prim_type
;
1719 shader
->Geom
.OutputType
= PRIM_UNKNOWN
;
1722 shader
->Geom
.Invocations
= 0;
1723 if (state
->in_qualifier
->flags
.q
.invocations
) {
1724 unsigned invocations
;
1725 if (state
->in_qualifier
->invocations
->
1726 process_qualifier_constant(state
, "invocations",
1727 &invocations
, false)) {
1729 YYLTYPE loc
= state
->in_qualifier
->invocations
->get_location();
1730 if (invocations
> MAX_GEOMETRY_SHADER_INVOCATIONS
) {
1731 _mesa_glsl_error(&loc
, state
,
1732 "invocations (%d) exceeds "
1733 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1736 shader
->Geom
.Invocations
= invocations
;
1741 case MESA_SHADER_COMPUTE
:
1742 if (state
->cs_input_local_size_specified
) {
1743 for (int i
= 0; i
< 3; i
++)
1744 shader
->Comp
.LocalSize
[i
] = state
->cs_input_local_size
[i
];
1746 for (int i
= 0; i
< 3; i
++)
1747 shader
->Comp
.LocalSize
[i
] = 0;
1751 case MESA_SHADER_FRAGMENT
:
1752 shader
->redeclares_gl_fragcoord
= state
->fs_redeclares_gl_fragcoord
;
1753 shader
->uses_gl_fragcoord
= state
->fs_uses_gl_fragcoord
;
1754 shader
->pixel_center_integer
= state
->fs_pixel_center_integer
;
1755 shader
->origin_upper_left
= state
->fs_origin_upper_left
;
1756 shader
->ARB_fragment_coord_conventions_enable
=
1757 state
->ARB_fragment_coord_conventions_enable
;
1758 shader
->EarlyFragmentTests
= state
->fs_early_fragment_tests
;
1762 /* Nothing to do. */
1770 assign_subroutine_indexes(struct gl_shader
*sh
,
1771 struct _mesa_glsl_parse_state
*state
)
1776 for (j
= 0; j
< state
->num_subroutines
; j
++) {
1777 while (state
->subroutines
[j
]->subroutine_index
== -1) {
1778 for (k
= 0; k
< state
->num_subroutines
; k
++) {
1779 if (state
->subroutines
[k
]->subroutine_index
== index
)
1781 else if (k
== state
->num_subroutines
- 1) {
1782 state
->subroutines
[j
]->subroutine_index
= index
;
1791 _mesa_glsl_compile_shader(struct gl_context
*ctx
, struct gl_shader
*shader
,
1792 bool dump_ast
, bool dump_hir
)
1794 struct _mesa_glsl_parse_state
*state
=
1795 new(shader
) _mesa_glsl_parse_state(ctx
, shader
->Stage
, shader
);
1796 const char *source
= shader
->Source
;
1798 if (ctx
->Const
.GenerateTemporaryNames
)
1799 (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names
,
1802 state
->error
= glcpp_preprocess(state
, &source
, &state
->info_log
,
1803 &ctx
->Extensions
, ctx
);
1805 if (!state
->error
) {
1806 _mesa_glsl_lexer_ctor(state
, source
);
1807 _mesa_glsl_parse(state
);
1808 _mesa_glsl_lexer_dtor(state
);
1812 foreach_list_typed(ast_node
, ast
, link
, &state
->translation_unit
) {
1818 ralloc_free(shader
->ir
);
1819 shader
->ir
= new(shader
) exec_list
;
1820 if (!state
->error
&& !state
->translation_unit
.is_empty())
1821 _mesa_ast_to_hir(shader
->ir
, state
);
1823 if (!state
->error
) {
1824 validate_ir_tree(shader
->ir
);
1826 /* Print out the unoptimized IR. */
1828 _mesa_print_ir(stdout
, shader
->ir
, state
);
1833 if (!state
->error
&& !shader
->ir
->is_empty()) {
1834 struct gl_shader_compiler_options
*options
=
1835 &ctx
->Const
.ShaderCompilerOptions
[shader
->Stage
];
1837 assign_subroutine_indexes(shader
, state
);
1838 lower_subroutine(shader
->ir
, state
);
1839 /* Do some optimization at compile time to reduce shader IR size
1840 * and reduce later work if the same shader is linked multiple times
1842 while (do_common_optimization(shader
->ir
, false, false, options
,
1843 ctx
->Const
.NativeIntegers
))
1846 validate_ir_tree(shader
->ir
);
1848 enum ir_variable_mode other
;
1849 switch (shader
->Stage
) {
1850 case MESA_SHADER_VERTEX
:
1851 other
= ir_var_shader_in
;
1853 case MESA_SHADER_FRAGMENT
:
1854 other
= ir_var_shader_out
;
1857 /* Something invalid to ensure optimize_dead_builtin_uniforms
1858 * doesn't remove anything other than uniforms or constants.
1860 other
= ir_var_mode_count
;
1864 optimize_dead_builtin_variables(shader
->ir
, other
);
1866 validate_ir_tree(shader
->ir
);
1869 if (shader
->InfoLog
)
1870 ralloc_free(shader
->InfoLog
);
1873 set_shader_inout_layout(shader
, state
);
1875 shader
->symbols
= new(shader
->ir
) glsl_symbol_table
;
1876 shader
->CompileStatus
= !state
->error
;
1877 shader
->InfoLog
= state
->info_log
;
1878 shader
->Version
= state
->language_version
;
1879 shader
->IsES
= state
->es_shader
;
1880 shader
->uses_builtin_functions
= state
->uses_builtin_functions
;
1882 /* Retain any live IR, but trash the rest. */
1883 reparent_ir(shader
->ir
, shader
->ir
);
1885 /* Destroy the symbol table. Create a new symbol table that contains only
1886 * the variables and functions that still exist in the IR. The symbol
1887 * table will be used later during linking.
1889 * There must NOT be any freed objects still referenced by the symbol
1890 * table. That could cause the linker to dereference freed memory.
1892 * We don't have to worry about types or interface-types here because those
1893 * are fly-weights that are looked up by glsl_type.
1895 foreach_in_list (ir_instruction
, ir
, shader
->ir
) {
1896 switch (ir
->ir_type
) {
1897 case ir_type_function
:
1898 shader
->symbols
->add_function((ir_function
*) ir
);
1900 case ir_type_variable
: {
1901 ir_variable
*const var
= (ir_variable
*) ir
;
1903 if (var
->data
.mode
!= ir_var_temporary
)
1904 shader
->symbols
->add_variable(var
);
1912 _mesa_glsl_initialize_derived_variables(ctx
, shader
);
1914 delete state
->symbols
;
1920 * Do the set of common optimizations passes
1922 * \param ir List of instructions to be optimized
1923 * \param linked Is the shader linked? This enables
1924 * optimizations passes that remove code at
1925 * global scope and could cause linking to
1927 * \param uniform_locations_assigned Have locations already been assigned for
1928 * uniforms? This prevents the declarations
1929 * of unused uniforms from being removed.
1930 * The setting of this flag only matters if
1931 * \c linked is \c true.
1932 * \param max_unroll_iterations Maximum number of loop iterations to be
1933 * unrolled. Setting to 0 disables loop
1935 * \param options The driver's preferred shader options.
1938 do_common_optimization(exec_list
*ir
, bool linked
,
1939 bool uniform_locations_assigned
,
1940 const struct gl_shader_compiler_options
*options
,
1941 bool native_integers
)
1943 const bool debug
= false;
1944 GLboolean progress
= GL_FALSE
;
1946 #define OPT(PASS, ...) do { \
1948 fprintf(stderr, "START GLSL optimization %s\n", #PASS); \
1949 const bool opt_progress = PASS(__VA_ARGS__); \
1950 progress = opt_progress || progress; \
1952 _mesa_print_ir(stderr, ir, NULL); \
1953 fprintf(stderr, "GLSL optimization %s: %s progress\n", \
1954 #PASS, opt_progress ? "made" : "no"); \
1956 progress = PASS(__VA_ARGS__) || progress; \
1960 OPT(lower_instructions
, ir
, SUB_TO_ADD_NEG
);
1963 OPT(do_function_inlining
, ir
);
1964 OPT(do_dead_functions
, ir
);
1965 OPT(do_structure_splitting
, ir
);
1967 propagate_invariance(ir
);
1968 OPT(do_if_simplification
, ir
);
1969 OPT(opt_flatten_nested_if_blocks
, ir
);
1970 OPT(opt_conditional_discard
, ir
);
1971 OPT(do_copy_propagation
, ir
);
1972 OPT(do_copy_propagation_elements
, ir
);
1974 if (options
->OptimizeForAOS
&& !linked
)
1975 OPT(opt_flip_matrices
, ir
);
1977 if (linked
&& options
->OptimizeForAOS
) {
1978 OPT(do_vectorize
, ir
);
1982 OPT(do_dead_code
, ir
, uniform_locations_assigned
);
1984 OPT(do_dead_code_unlinked
, ir
);
1985 OPT(do_dead_code_local
, ir
);
1986 OPT(do_tree_grafting
, ir
);
1987 OPT(do_constant_propagation
, ir
);
1989 OPT(do_constant_variable
, ir
);
1991 OPT(do_constant_variable_unlinked
, ir
);
1992 OPT(do_constant_folding
, ir
);
1993 OPT(do_minmax_prune
, ir
);
1994 OPT(do_rebalance_tree
, ir
);
1995 OPT(do_algebraic
, ir
, native_integers
, options
);
1996 OPT(do_lower_jumps
, ir
);
1997 OPT(do_vec_index_to_swizzle
, ir
);
1998 OPT(lower_vector_insert
, ir
, false);
1999 OPT(do_swizzle_swizzle
, ir
);
2000 OPT(do_noop_swizzle
, ir
);
2002 OPT(optimize_split_arrays
, ir
, linked
);
2003 OPT(optimize_redundant_jumps
, ir
);
2005 loop_state
*ls
= analyze_loop_variables(ir
);
2006 if (ls
->loop_found
) {
2007 OPT(set_loop_controls
, ir
, ls
);
2008 OPT(unroll_loops
, ir
, ls
, options
);
2020 * To be called at GL teardown time, this frees compiler datastructures.
2022 * After calling this, any previously compiled shaders and shader
2023 * programs would be invalid. So this should happen at approximately
2027 _mesa_destroy_shader_compiler(void)
2029 _mesa_destroy_shader_compiler_caches();
2031 _mesa_glsl_release_types();
2035 * Releases compiler caches to trade off performance for memory.
2037 * Intended to be used with glReleaseShaderCompiler().
2040 _mesa_destroy_shader_compiler_caches(void)
2042 _mesa_glsl_release_builtin_functions();