2 * Copyright © 2008, 2009 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
28 #include "main/core.h" /* for struct gl_context */
29 #include "main/context.h"
30 #include "main/shaderobj.h"
31 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
32 #include "util/ralloc.h"
34 #include "glsl_parser_extras.h"
35 #include "glsl_parser.h"
36 #include "ir_optimization.h"
37 #include "loop_analysis.h"
40 * Format a short human-readable description of the given GLSL version.
43 glsl_compute_version_string(void *mem_ctx
, bool is_es
, unsigned version
)
45 return ralloc_asprintf(mem_ctx
, "GLSL%s %d.%02d", is_es
? " ES" : "",
46 version
/ 100, version
% 100);
50 static const unsigned known_desktop_glsl_versions
[] =
51 { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450 };
54 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context
*_ctx
,
55 gl_shader_stage stage
,
57 : ctx(_ctx
), cs_input_local_size_specified(false), cs_input_local_size(),
60 assert(stage
< MESA_SHADER_STAGES
);
64 this->translation_unit
.make_empty();
65 this->symbols
= new(mem_ctx
) glsl_symbol_table
;
67 this->info_log
= ralloc_strdup(mem_ctx
, "");
69 this->loop_nesting_ast
= NULL
;
71 this->struct_specifier_depth
= 0;
73 this->uses_builtin_functions
= false;
75 /* Set default language version and extensions */
76 this->language_version
= 110;
77 this->forced_language_version
= ctx
->Const
.ForceGLSLVersion
;
78 this->es_shader
= false;
79 this->ARB_texture_rectangle_enable
= true;
81 /* OpenGL ES 2.0 has different defaults from desktop GL. */
82 if (ctx
->API
== API_OPENGLES2
) {
83 this->language_version
= 100;
84 this->es_shader
= true;
85 this->ARB_texture_rectangle_enable
= false;
88 this->extensions
= &ctx
->Extensions
;
90 this->Const
.MaxLights
= ctx
->Const
.MaxLights
;
91 this->Const
.MaxClipPlanes
= ctx
->Const
.MaxClipPlanes
;
92 this->Const
.MaxTextureUnits
= ctx
->Const
.MaxTextureUnits
;
93 this->Const
.MaxTextureCoords
= ctx
->Const
.MaxTextureCoordUnits
;
94 this->Const
.MaxVertexAttribs
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAttribs
;
95 this->Const
.MaxVertexUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxUniformComponents
;
96 this->Const
.MaxVertexTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
;
97 this->Const
.MaxCombinedTextureImageUnits
= ctx
->Const
.MaxCombinedTextureImageUnits
;
98 this->Const
.MaxTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
;
99 this->Const
.MaxFragmentUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxUniformComponents
;
100 this->Const
.MinProgramTexelOffset
= ctx
->Const
.MinProgramTexelOffset
;
101 this->Const
.MaxProgramTexelOffset
= ctx
->Const
.MaxProgramTexelOffset
;
103 this->Const
.MaxDrawBuffers
= ctx
->Const
.MaxDrawBuffers
;
106 this->Const
.MaxVertexOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxOutputComponents
;
107 this->Const
.MaxGeometryInputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxInputComponents
;
108 this->Const
.MaxGeometryOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxOutputComponents
;
109 this->Const
.MaxFragmentInputComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxInputComponents
;
110 this->Const
.MaxGeometryTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
;
111 this->Const
.MaxGeometryOutputVertices
= ctx
->Const
.MaxGeometryOutputVertices
;
112 this->Const
.MaxGeometryTotalOutputComponents
= ctx
->Const
.MaxGeometryTotalOutputComponents
;
113 this->Const
.MaxGeometryUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxUniformComponents
;
115 this->Const
.MaxVertexAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicCounters
;
116 this->Const
.MaxTessControlAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxAtomicCounters
;
117 this->Const
.MaxTessEvaluationAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxAtomicCounters
;
118 this->Const
.MaxGeometryAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicCounters
;
119 this->Const
.MaxFragmentAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicCounters
;
120 this->Const
.MaxCombinedAtomicCounters
= ctx
->Const
.MaxCombinedAtomicCounters
;
121 this->Const
.MaxAtomicBufferBindings
= ctx
->Const
.MaxAtomicBufferBindings
;
122 this->Const
.MaxVertexAtomicCounterBuffers
=
123 ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicBuffers
;
124 this->Const
.MaxTessControlAtomicCounterBuffers
=
125 ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxAtomicBuffers
;
126 this->Const
.MaxTessEvaluationAtomicCounterBuffers
=
127 ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxAtomicBuffers
;
128 this->Const
.MaxGeometryAtomicCounterBuffers
=
129 ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicBuffers
;
130 this->Const
.MaxFragmentAtomicCounterBuffers
=
131 ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicBuffers
;
132 this->Const
.MaxCombinedAtomicCounterBuffers
=
133 ctx
->Const
.MaxCombinedAtomicBuffers
;
134 this->Const
.MaxAtomicCounterBufferSize
=
135 ctx
->Const
.MaxAtomicBufferSize
;
137 /* Compute shader constants */
138 for (unsigned i
= 0; i
< ARRAY_SIZE(this->Const
.MaxComputeWorkGroupCount
); i
++)
139 this->Const
.MaxComputeWorkGroupCount
[i
] = ctx
->Const
.MaxComputeWorkGroupCount
[i
];
140 for (unsigned i
= 0; i
< ARRAY_SIZE(this->Const
.MaxComputeWorkGroupSize
); i
++)
141 this->Const
.MaxComputeWorkGroupSize
[i
] = ctx
->Const
.MaxComputeWorkGroupSize
[i
];
143 this->Const
.MaxImageUnits
= ctx
->Const
.MaxImageUnits
;
144 this->Const
.MaxCombinedShaderOutputResources
= ctx
->Const
.MaxCombinedShaderOutputResources
;
145 this->Const
.MaxImageSamples
= ctx
->Const
.MaxImageSamples
;
146 this->Const
.MaxVertexImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxImageUniforms
;
147 this->Const
.MaxTessControlImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxImageUniforms
;
148 this->Const
.MaxTessEvaluationImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxImageUniforms
;
149 this->Const
.MaxGeometryImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxImageUniforms
;
150 this->Const
.MaxFragmentImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxImageUniforms
;
151 this->Const
.MaxCombinedImageUniforms
= ctx
->Const
.MaxCombinedImageUniforms
;
153 /* ARB_viewport_array */
154 this->Const
.MaxViewports
= ctx
->Const
.MaxViewports
;
156 /* tessellation shader constants */
157 this->Const
.MaxPatchVertices
= ctx
->Const
.MaxPatchVertices
;
158 this->Const
.MaxTessGenLevel
= ctx
->Const
.MaxTessGenLevel
;
159 this->Const
.MaxTessControlInputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxInputComponents
;
160 this->Const
.MaxTessControlOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxOutputComponents
;
161 this->Const
.MaxTessControlTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxTextureImageUnits
;
162 this->Const
.MaxTessEvaluationInputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxInputComponents
;
163 this->Const
.MaxTessEvaluationOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxOutputComponents
;
164 this->Const
.MaxTessEvaluationTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxTextureImageUnits
;
165 this->Const
.MaxTessPatchComponents
= ctx
->Const
.MaxTessPatchComponents
;
166 this->Const
.MaxTessControlTotalOutputComponents
= ctx
->Const
.MaxTessControlTotalOutputComponents
;
167 this->Const
.MaxTessControlUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_CTRL
].MaxUniformComponents
;
168 this->Const
.MaxTessEvaluationUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_TESS_EVAL
].MaxUniformComponents
;
170 this->current_function
= NULL
;
171 this->toplevel_ir
= NULL
;
172 this->found_return
= false;
173 this->all_invariant
= false;
174 this->user_structures
= NULL
;
175 this->num_user_structures
= 0;
176 this->num_subroutines
= 0;
177 this->subroutines
= NULL
;
178 this->num_subroutine_types
= 0;
179 this->subroutine_types
= NULL
;
181 /* supported_versions should be large enough to support the known desktop
182 * GLSL versions plus 3 GLES versions (ES 1.00, ES 3.00, and ES 3.10))
184 STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions
) + 3) ==
185 ARRAY_SIZE(this->supported_versions
));
187 /* Populate the list of supported GLSL versions */
188 /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
189 * the OpenGL 3.2 Core context is supported, this logic will need
190 * change. Older versions of GLSL are no longer supported
191 * outside the compatibility contexts of 3.x.
193 this->num_supported_versions
= 0;
194 if (_mesa_is_desktop_gl(ctx
)) {
195 for (unsigned i
= 0; i
< ARRAY_SIZE(known_desktop_glsl_versions
); i
++) {
196 if (known_desktop_glsl_versions
[i
] <= ctx
->Const
.GLSLVersion
) {
197 this->supported_versions
[this->num_supported_versions
].ver
198 = known_desktop_glsl_versions
[i
];
199 this->supported_versions
[this->num_supported_versions
].es
= false;
200 this->num_supported_versions
++;
204 if (ctx
->API
== API_OPENGLES2
|| ctx
->Extensions
.ARB_ES2_compatibility
) {
205 this->supported_versions
[this->num_supported_versions
].ver
= 100;
206 this->supported_versions
[this->num_supported_versions
].es
= true;
207 this->num_supported_versions
++;
209 if (_mesa_is_gles3(ctx
) || ctx
->Extensions
.ARB_ES3_compatibility
) {
210 this->supported_versions
[this->num_supported_versions
].ver
= 300;
211 this->supported_versions
[this->num_supported_versions
].es
= true;
212 this->num_supported_versions
++;
214 if (_mesa_is_gles31(ctx
)) {
215 this->supported_versions
[this->num_supported_versions
].ver
= 310;
216 this->supported_versions
[this->num_supported_versions
].es
= true;
217 this->num_supported_versions
++;
220 /* Create a string for use in error messages to tell the user which GLSL
221 * versions are supported.
223 char *supported
= ralloc_strdup(this, "");
224 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
225 unsigned ver
= this->supported_versions
[i
].ver
;
226 const char *const prefix
= (i
== 0)
228 : ((i
== this->num_supported_versions
- 1) ? ", and " : ", ");
229 const char *const suffix
= (this->supported_versions
[i
].es
) ? " ES" : "";
231 ralloc_asprintf_append(& supported
, "%s%u.%02u%s",
233 ver
/ 100, ver
% 100,
237 this->supported_version_string
= supported
;
239 if (ctx
->Const
.ForceGLSLExtensionsWarn
)
240 _mesa_glsl_process_extension("all", NULL
, "warn", NULL
, this);
242 this->default_uniform_qualifier
= new(this) ast_type_qualifier();
243 this->default_uniform_qualifier
->flags
.q
.shared
= 1;
244 this->default_uniform_qualifier
->flags
.q
.column_major
= 1;
245 this->default_uniform_qualifier
->is_default_qualifier
= true;
247 this->default_shader_storage_qualifier
= new(this) ast_type_qualifier();
248 this->default_shader_storage_qualifier
->flags
.q
.shared
= 1;
249 this->default_shader_storage_qualifier
->flags
.q
.column_major
= 1;
250 this->default_shader_storage_qualifier
->is_default_qualifier
= true;
252 this->fs_uses_gl_fragcoord
= false;
253 this->fs_redeclares_gl_fragcoord
= false;
254 this->fs_origin_upper_left
= false;
255 this->fs_pixel_center_integer
= false;
256 this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers
= false;
258 this->gs_input_prim_type_specified
= false;
259 this->tcs_output_vertices_specified
= false;
260 this->gs_input_size
= 0;
261 this->in_qualifier
= new(this) ast_type_qualifier();
262 this->out_qualifier
= new(this) ast_type_qualifier();
263 this->fs_early_fragment_tests
= false;
264 memset(this->atomic_counter_offsets
, 0,
265 sizeof(this->atomic_counter_offsets
));
266 this->allow_extension_directive_midshader
=
267 ctx
->Const
.AllowGLSLExtensionDirectiveMidShader
;
271 * Determine whether the current GLSL version is sufficiently high to support
272 * a certain feature, and generate an error message if it isn't.
274 * \param required_glsl_version and \c required_glsl_es_version are
275 * interpreted as they are in _mesa_glsl_parse_state::is_version().
277 * \param locp is the parser location where the error should be reported.
279 * \param fmt (and additional arguments) constitute a printf-style error
280 * message to report if the version check fails. Information about the
281 * current and required GLSL versions will be appended. So, for example, if
282 * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
283 * "foo unsupported") is called, the error message will be "foo unsupported in
284 * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
287 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version
,
288 unsigned required_glsl_es_version
,
289 YYLTYPE
*locp
, const char *fmt
, ...)
291 if (this->is_version(required_glsl_version
, required_glsl_es_version
))
296 char *problem
= ralloc_vasprintf(this, fmt
, args
);
298 const char *glsl_version_string
299 = glsl_compute_version_string(this, false, required_glsl_version
);
300 const char *glsl_es_version_string
301 = glsl_compute_version_string(this, true, required_glsl_es_version
);
302 const char *requirement_string
= "";
303 if (required_glsl_version
&& required_glsl_es_version
) {
304 requirement_string
= ralloc_asprintf(this, " (%s or %s required)",
306 glsl_es_version_string
);
307 } else if (required_glsl_version
) {
308 requirement_string
= ralloc_asprintf(this, " (%s required)",
309 glsl_version_string
);
310 } else if (required_glsl_es_version
) {
311 requirement_string
= ralloc_asprintf(this, " (%s required)",
312 glsl_es_version_string
);
314 _mesa_glsl_error(locp
, this, "%s in %s%s",
315 problem
, this->get_version_string(),
322 * Process a GLSL #version directive.
324 * \param version is the integer that follows the #version token.
326 * \param ident is a string identifier that follows the integer, if any is
327 * present. Otherwise NULL.
330 _mesa_glsl_parse_state::process_version_directive(YYLTYPE
*locp
, int version
,
333 bool es_token_present
= false;
335 if (strcmp(ident
, "es") == 0) {
336 es_token_present
= true;
337 } else if (version
>= 150) {
338 if (strcmp(ident
, "core") == 0) {
339 /* Accept the token. There's no need to record that this is
340 * a core profile shader since that's the only profile we support.
342 } else if (strcmp(ident
, "compatibility") == 0) {
343 _mesa_glsl_error(locp
, this,
344 "the compatibility profile is not supported");
346 _mesa_glsl_error(locp
, this,
347 "\"%s\" is not a valid shading language profile; "
348 "if present, it must be \"core\"", ident
);
351 _mesa_glsl_error(locp
, this,
352 "illegal text following version number");
356 this->es_shader
= es_token_present
;
357 if (version
== 100) {
358 if (es_token_present
) {
359 _mesa_glsl_error(locp
, this,
360 "GLSL 1.00 ES should be selected using "
363 this->es_shader
= true;
367 if (this->es_shader
) {
368 this->ARB_texture_rectangle_enable
= false;
371 if (this->forced_language_version
)
372 this->language_version
= this->forced_language_version
;
374 this->language_version
= version
;
376 bool supported
= false;
377 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
378 if (this->supported_versions
[i
].ver
== this->language_version
379 && this->supported_versions
[i
].es
== this->es_shader
) {
386 _mesa_glsl_error(locp
, this, "%s is not supported. "
387 "Supported versions are: %s",
388 this->get_version_string(),
389 this->supported_version_string
);
391 /* On exit, the language_version must be set to a valid value.
392 * Later calls to _mesa_glsl_initialize_types will misbehave if
393 * the version is invalid.
395 switch (this->ctx
->API
) {
396 case API_OPENGL_COMPAT
:
397 case API_OPENGL_CORE
:
398 this->language_version
= this->ctx
->Const
.GLSLVersion
;
402 assert(!"Should not get here.");
406 this->language_version
= 100;
414 * Translate a gl_shader_stage to a short shader stage name for debug
415 * printouts and error messages.
418 _mesa_shader_stage_to_string(unsigned stage
)
421 case MESA_SHADER_VERTEX
: return "vertex";
422 case MESA_SHADER_FRAGMENT
: return "fragment";
423 case MESA_SHADER_GEOMETRY
: return "geometry";
424 case MESA_SHADER_COMPUTE
: return "compute";
425 case MESA_SHADER_TESS_CTRL
: return "tess ctrl";
426 case MESA_SHADER_TESS_EVAL
: return "tess eval";
429 unreachable("Unknown shader stage.");
433 * Translate a gl_shader_stage to a shader stage abbreviation (VS, GS, FS)
434 * for debug printouts and error messages.
437 _mesa_shader_stage_to_abbrev(unsigned stage
)
440 case MESA_SHADER_VERTEX
: return "VS";
441 case MESA_SHADER_FRAGMENT
: return "FS";
442 case MESA_SHADER_GEOMETRY
: return "GS";
443 case MESA_SHADER_COMPUTE
: return "CS";
444 case MESA_SHADER_TESS_CTRL
: return "TCS";
445 case MESA_SHADER_TESS_EVAL
: return "TES";
448 unreachable("Unknown shader stage.");
451 /* This helper function will append the given message to the shader's
452 info log and report it via GL_ARB_debug_output. Per that extension,
453 'type' is one of the enum values classifying the message, and
454 'id' is the implementation-defined ID of the given message. */
456 _mesa_glsl_msg(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
457 GLenum type
, const char *fmt
, va_list ap
)
459 bool error
= (type
== MESA_DEBUG_TYPE_ERROR
);
462 assert(state
->info_log
!= NULL
);
464 /* Get the offset that the new message will be written to. */
465 int msg_offset
= strlen(state
->info_log
);
467 ralloc_asprintf_append(&state
->info_log
, "%u:%u(%u): %s: ",
471 error
? "error" : "warning");
472 ralloc_vasprintf_append(&state
->info_log
, fmt
, ap
);
474 const char *const msg
= &state
->info_log
[msg_offset
];
475 struct gl_context
*ctx
= state
->ctx
;
477 /* Report the error via GL_ARB_debug_output. */
478 _mesa_shader_debug(ctx
, type
, &msg_id
, msg
, strlen(msg
));
480 ralloc_strcat(&state
->info_log
, "\n");
484 _mesa_glsl_error(YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
485 const char *fmt
, ...)
492 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_ERROR
, fmt
, ap
);
498 _mesa_glsl_warning(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
499 const char *fmt
, ...)
504 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_OTHER
, fmt
, ap
);
510 * Enum representing the possible behaviors that can be specified in
511 * an #extension directive.
521 * Element type for _mesa_glsl_supported_extensions
523 struct _mesa_glsl_extension
{
525 * Name of the extension when referred to in a GLSL extension
530 /** True if this extension is available to desktop GL shaders */
533 /** True if this extension is available to GLES shaders */
537 * Flag in the gl_extensions struct indicating whether this
538 * extension is supported by the driver, or
539 * &gl_extensions::dummy_true if supported by all drivers.
541 * Note: the type (GLboolean gl_extensions::*) is a "pointer to
542 * member" type, the type-safe alternative to the "offsetof" macro.
545 * - foo bar::* p declares p to be an "offset" to a field of type
546 * foo that exists within struct bar
547 * - &bar::baz computes the "offset" of field baz within struct bar
548 * - x.*p accesses the field of x that exists at "offset" p
549 * - x->*p is equivalent to (*x).*p
551 const GLboolean
gl_extensions::* supported_flag
;
554 * Flag in the _mesa_glsl_parse_state struct that should be set
555 * when this extension is enabled.
557 * See note in _mesa_glsl_extension::supported_flag about "pointer
560 bool _mesa_glsl_parse_state::* enable_flag
;
563 * Flag in the _mesa_glsl_parse_state struct that should be set
564 * when the shader requests "warn" behavior for this extension.
566 * See note in _mesa_glsl_extension::supported_flag about "pointer
569 bool _mesa_glsl_parse_state::* warn_flag
;
572 bool compatible_with_state(const _mesa_glsl_parse_state
*state
) const;
573 void set_flags(_mesa_glsl_parse_state
*state
, ext_behavior behavior
) const;
576 #define EXT(NAME, GL, ES, SUPPORTED_FLAG) \
577 { "GL_" #NAME, GL, ES, &gl_extensions::SUPPORTED_FLAG, \
578 &_mesa_glsl_parse_state::NAME##_enable, \
579 &_mesa_glsl_parse_state::NAME##_warn }
582 * Table of extensions that can be enabled/disabled within a shader,
583 * and the conditions under which they are supported.
585 static const _mesa_glsl_extension _mesa_glsl_supported_extensions
[] = {
586 /* API availability */
587 /* name GL ES supported flag */
589 /* ARB extensions go here, sorted alphabetically.
591 EXT(ARB_arrays_of_arrays
, true, false, ARB_arrays_of_arrays
),
592 EXT(ARB_compute_shader
, true, false, ARB_compute_shader
),
593 EXT(ARB_conservative_depth
, true, false, ARB_conservative_depth
),
594 EXT(ARB_derivative_control
, true, false, ARB_derivative_control
),
595 EXT(ARB_draw_buffers
, true, false, dummy_true
),
596 EXT(ARB_draw_instanced
, true, false, ARB_draw_instanced
),
597 EXT(ARB_explicit_attrib_location
, true, false, ARB_explicit_attrib_location
),
598 EXT(ARB_explicit_uniform_location
, true, false, ARB_explicit_uniform_location
),
599 EXT(ARB_fragment_coord_conventions
, true, false, ARB_fragment_coord_conventions
),
600 EXT(ARB_fragment_layer_viewport
, true, false, ARB_fragment_layer_viewport
),
601 EXT(ARB_gpu_shader5
, true, false, ARB_gpu_shader5
),
602 EXT(ARB_gpu_shader_fp64
, true, false, ARB_gpu_shader_fp64
),
603 EXT(ARB_sample_shading
, true, false, ARB_sample_shading
),
604 EXT(ARB_separate_shader_objects
, true, false, dummy_true
),
605 EXT(ARB_shader_atomic_counters
, true, false, ARB_shader_atomic_counters
),
606 EXT(ARB_shader_bit_encoding
, true, false, ARB_shader_bit_encoding
),
607 EXT(ARB_shader_image_load_store
, true, false, ARB_shader_image_load_store
),
608 EXT(ARB_shader_image_size
, true, false, ARB_shader_image_size
),
609 EXT(ARB_shader_precision
, true, false, ARB_shader_precision
),
610 EXT(ARB_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
611 EXT(ARB_shader_storage_buffer_object
, true, true, ARB_shader_storage_buffer_object
),
612 EXT(ARB_shader_subroutine
, true, false, ARB_shader_subroutine
),
613 EXT(ARB_shader_texture_image_samples
, true, false, ARB_shader_texture_image_samples
),
614 EXT(ARB_shader_texture_lod
, true, false, ARB_shader_texture_lod
),
615 EXT(ARB_shading_language_420pack
, true, false, ARB_shading_language_420pack
),
616 EXT(ARB_shading_language_packing
, true, false, ARB_shading_language_packing
),
617 EXT(ARB_tessellation_shader
, true, false, ARB_tessellation_shader
),
618 EXT(ARB_texture_cube_map_array
, true, false, ARB_texture_cube_map_array
),
619 EXT(ARB_texture_gather
, true, false, ARB_texture_gather
),
620 EXT(ARB_texture_multisample
, true, false, ARB_texture_multisample
),
621 EXT(ARB_texture_query_levels
, true, false, ARB_texture_query_levels
),
622 EXT(ARB_texture_query_lod
, true, false, ARB_texture_query_lod
),
623 EXT(ARB_texture_rectangle
, true, false, dummy_true
),
624 EXT(ARB_uniform_buffer_object
, true, false, ARB_uniform_buffer_object
),
625 EXT(ARB_vertex_attrib_64bit
, true, false, ARB_vertex_attrib_64bit
),
626 EXT(ARB_viewport_array
, true, false, ARB_viewport_array
),
628 /* KHR extensions go here, sorted alphabetically.
631 /* OES extensions go here, sorted alphabetically.
633 EXT(OES_EGL_image_external
, false, true, OES_EGL_image_external
),
634 EXT(OES_standard_derivatives
, false, true, OES_standard_derivatives
),
635 EXT(OES_texture_3D
, false, true, EXT_texture3D
),
636 EXT(OES_texture_storage_multisample_2d_array
, false, true, ARB_texture_multisample
),
638 /* All other extensions go here, sorted alphabetically.
640 EXT(AMD_conservative_depth
, true, false, ARB_conservative_depth
),
641 EXT(AMD_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
642 EXT(AMD_shader_trinary_minmax
, true, false, dummy_true
),
643 EXT(AMD_vertex_shader_layer
, true, false, AMD_vertex_shader_layer
),
644 EXT(AMD_vertex_shader_viewport_index
, true, false, AMD_vertex_shader_viewport_index
),
645 EXT(EXT_draw_buffers
, false, true, dummy_true
),
646 EXT(EXT_separate_shader_objects
, false, true, dummy_true
),
647 EXT(EXT_shader_integer_mix
, true, true, EXT_shader_integer_mix
),
648 EXT(EXT_texture_array
, true, false, EXT_texture_array
),
655 * Determine whether a given extension is compatible with the target,
656 * API, and extension information in the current parser state.
658 bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state
*
661 /* Check that this extension matches whether we are compiling
662 * for desktop GL or GLES.
664 if (state
->es_shader
) {
665 if (!this->avail_in_ES
) return false;
667 if (!this->avail_in_GL
) return false;
670 /* Check that this extension is supported by the OpenGL
673 * Note: the ->* operator indexes into state->extensions by the
674 * offset this->supported_flag. See
675 * _mesa_glsl_extension::supported_flag for more info.
677 return state
->extensions
->*(this->supported_flag
);
681 * Set the appropriate flags in the parser state to establish the
682 * given behavior for this extension.
684 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state
*state
,
685 ext_behavior behavior
) const
687 /* Note: the ->* operator indexes into state by the
688 * offsets this->enable_flag and this->warn_flag. See
689 * _mesa_glsl_extension::supported_flag for more info.
691 state
->*(this->enable_flag
) = (behavior
!= extension_disable
);
692 state
->*(this->warn_flag
) = (behavior
== extension_warn
);
696 * Find an extension by name in _mesa_glsl_supported_extensions. If
697 * the name is not found, return NULL.
699 static const _mesa_glsl_extension
*find_extension(const char *name
)
701 for (unsigned i
= 0; i
< ARRAY_SIZE(_mesa_glsl_supported_extensions
); ++i
) {
702 if (strcmp(name
, _mesa_glsl_supported_extensions
[i
].name
) == 0) {
703 return &_mesa_glsl_supported_extensions
[i
];
711 _mesa_glsl_process_extension(const char *name
, YYLTYPE
*name_locp
,
712 const char *behavior_string
, YYLTYPE
*behavior_locp
,
713 _mesa_glsl_parse_state
*state
)
715 ext_behavior behavior
;
716 if (strcmp(behavior_string
, "warn") == 0) {
717 behavior
= extension_warn
;
718 } else if (strcmp(behavior_string
, "require") == 0) {
719 behavior
= extension_require
;
720 } else if (strcmp(behavior_string
, "enable") == 0) {
721 behavior
= extension_enable
;
722 } else if (strcmp(behavior_string
, "disable") == 0) {
723 behavior
= extension_disable
;
725 _mesa_glsl_error(behavior_locp
, state
,
726 "unknown extension behavior `%s'",
731 if (strcmp(name
, "all") == 0) {
732 if ((behavior
== extension_enable
) || (behavior
== extension_require
)) {
733 _mesa_glsl_error(name_locp
, state
, "cannot %s all extensions",
734 (behavior
== extension_enable
)
735 ? "enable" : "require");
739 i
< ARRAY_SIZE(_mesa_glsl_supported_extensions
); ++i
) {
740 const _mesa_glsl_extension
*extension
741 = &_mesa_glsl_supported_extensions
[i
];
742 if (extension
->compatible_with_state(state
)) {
743 _mesa_glsl_supported_extensions
[i
].set_flags(state
, behavior
);
748 const _mesa_glsl_extension
*extension
= find_extension(name
);
749 if (extension
&& extension
->compatible_with_state(state
)) {
750 extension
->set_flags(state
, behavior
);
752 static const char fmt
[] = "extension `%s' unsupported in %s shader";
754 if (behavior
== extension_require
) {
755 _mesa_glsl_error(name_locp
, state
, fmt
,
756 name
, _mesa_shader_stage_to_string(state
->stage
));
759 _mesa_glsl_warning(name_locp
, state
, fmt
,
760 name
, _mesa_shader_stage_to_string(state
->stage
));
770 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
771 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
772 * (process_array_constructor, et al) sufficient information to do type
775 * Operates on assignments involving an aggregate initializer. E.g.,
777 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
779 * or more ridiculously,
792 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
793 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
798 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
799 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
805 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
806 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
812 * This pass is necessary because the right-hand side of <type> e = { ... }
813 * doesn't contain sufficient information to determine if the types match.
816 _mesa_ast_set_aggregate_type(const glsl_type
*type
,
817 ast_expression
*expr
)
819 ast_aggregate_initializer
*ai
= (ast_aggregate_initializer
*)expr
;
820 ai
->constructor_type
= type
;
822 /* If the aggregate is an array, recursively set its elements' types. */
823 if (type
->is_array()) {
824 /* Each array element has the type type->fields.array.
826 * E.g., if <type> if struct S[2] we want to set each element's type to
829 for (exec_node
*expr_node
= ai
->expressions
.head
;
830 !expr_node
->is_tail_sentinel();
831 expr_node
= expr_node
->next
) {
832 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
835 if (expr
->oper
== ast_aggregate
)
836 _mesa_ast_set_aggregate_type(type
->fields
.array
, expr
);
839 /* If the aggregate is a struct, recursively set its fields' types. */
840 } else if (type
->is_record()) {
841 exec_node
*expr_node
= ai
->expressions
.head
;
843 /* Iterate through the struct's fields. */
844 for (unsigned i
= 0; !expr_node
->is_tail_sentinel() && i
< type
->length
;
845 i
++, expr_node
= expr_node
->next
) {
846 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
849 if (expr
->oper
== ast_aggregate
) {
850 _mesa_ast_set_aggregate_type(type
->fields
.structure
[i
].type
, expr
);
853 /* If the aggregate is a matrix, set its columns' types. */
854 } else if (type
->is_matrix()) {
855 for (exec_node
*expr_node
= ai
->expressions
.head
;
856 !expr_node
->is_tail_sentinel();
857 expr_node
= expr_node
->next
) {
858 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
861 if (expr
->oper
== ast_aggregate
)
862 _mesa_ast_set_aggregate_type(type
->column_type(), expr
);
868 _mesa_ast_process_interface_block(YYLTYPE
*locp
,
869 _mesa_glsl_parse_state
*state
,
870 ast_interface_block
*const block
,
871 const struct ast_type_qualifier q
)
873 if (q
.flags
.q
.buffer
) {
874 if (!state
->has_shader_storage_buffer_objects()) {
875 _mesa_glsl_error(locp
, state
,
876 "#version 430 / GL_ARB_shader_storage_buffer_object "
877 "required for defining shader storage blocks");
878 } else if (state
->ARB_shader_storage_buffer_object_warn
) {
879 _mesa_glsl_warning(locp
, state
,
880 "#version 430 / GL_ARB_shader_storage_buffer_object "
881 "required for defining shader storage blocks");
883 } else if (q
.flags
.q
.uniform
) {
884 if (!state
->has_uniform_buffer_objects()) {
885 _mesa_glsl_error(locp
, state
,
886 "#version 140 / GL_ARB_uniform_buffer_object "
887 "required for defining uniform blocks");
888 } else if (state
->ARB_uniform_buffer_object_warn
) {
889 _mesa_glsl_warning(locp
, state
,
890 "#version 140 / GL_ARB_uniform_buffer_object "
891 "required for defining uniform blocks");
894 if (state
->es_shader
|| state
->language_version
< 150) {
895 _mesa_glsl_error(locp
, state
,
896 "#version 150 required for using "
901 /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
902 * "It is illegal to have an input block in a vertex shader
903 * or an output block in a fragment shader"
905 if ((state
->stage
== MESA_SHADER_VERTEX
) && q
.flags
.q
.in
) {
906 _mesa_glsl_error(locp
, state
,
907 "`in' interface block is not allowed for "
909 } else if ((state
->stage
== MESA_SHADER_FRAGMENT
) && q
.flags
.q
.out
) {
910 _mesa_glsl_error(locp
, state
,
911 "`out' interface block is not allowed for "
912 "a fragment shader");
915 /* Since block arrays require names, and both features are added in
916 * the same language versions, we don't have to explicitly
917 * version-check both things.
919 if (block
->instance_name
!= NULL
) {
920 state
->check_version(150, 300, locp
, "interface blocks with "
921 "an instance name are not allowed");
924 uint64_t interface_type_mask
;
925 struct ast_type_qualifier temp_type_qualifier
;
927 /* Get a bitmask containing only the in/out/uniform/buffer
928 * flags, allowing us to ignore other irrelevant flags like
929 * interpolation qualifiers.
931 temp_type_qualifier
.flags
.i
= 0;
932 temp_type_qualifier
.flags
.q
.uniform
= true;
933 temp_type_qualifier
.flags
.q
.in
= true;
934 temp_type_qualifier
.flags
.q
.out
= true;
935 temp_type_qualifier
.flags
.q
.buffer
= true;
936 interface_type_mask
= temp_type_qualifier
.flags
.i
;
938 /* Get the block's interface qualifier. The interface_qualifier
939 * production rule guarantees that only one bit will be set (and
940 * it will be in/out/uniform).
942 uint64_t block_interface_qualifier
= q
.flags
.i
;
944 block
->layout
.flags
.i
|= block_interface_qualifier
;
946 if (state
->stage
== MESA_SHADER_GEOMETRY
&&
947 state
->has_explicit_attrib_stream()) {
948 /* Assign global layout's stream value. */
949 block
->layout
.flags
.q
.stream
= 1;
950 block
->layout
.flags
.q
.explicit_stream
= 0;
951 block
->layout
.stream
= state
->out_qualifier
->stream
;
954 foreach_list_typed (ast_declarator_list
, member
, link
, &block
->declarations
) {
955 ast_type_qualifier
& qualifier
= member
->type
->qualifier
;
956 if ((qualifier
.flags
.i
& interface_type_mask
) == 0) {
957 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
958 * "If no optional qualifier is used in a member declaration, the
959 * qualifier of the variable is just in, out, or uniform as declared
960 * by interface-qualifier."
962 qualifier
.flags
.i
|= block_interface_qualifier
;
963 } else if ((qualifier
.flags
.i
& interface_type_mask
) !=
964 block_interface_qualifier
) {
965 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
966 * "If optional qualifiers are used, they can include interpolation
967 * and storage qualifiers and they must declare an input, output,
968 * or uniform variable consistent with the interface qualifier of
971 _mesa_glsl_error(locp
, state
,
972 "uniform/in/out qualifier on "
973 "interface block member does not match "
974 "the interface block");
977 /* From GLSL ES 3.0, chapter 4.3.7 "Interface Blocks":
979 * "GLSL ES 3.0 does not support interface blocks for shader inputs or
982 * And from GLSL ES 3.0, chapter 4.6.1 "The invariant qualifier":.
984 * "Only variables output from a shader can be candidates for
987 * From GLSL 4.40 and GLSL 1.50, section "Interface Blocks":
989 * "If optional qualifiers are used, they can include interpolation
990 * qualifiers, auxiliary storage qualifiers, and storage qualifiers
991 * and they must declare an input, output, or uniform member
992 * consistent with the interface qualifier of the block"
994 if (qualifier
.flags
.q
.invariant
)
995 _mesa_glsl_error(locp
, state
,
996 "invariant qualifiers cannot be used "
997 "with interface blocks members");
1002 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier
*q
)
1004 if (q
->flags
.q
.subroutine
)
1005 printf("subroutine ");
1007 if (q
->flags
.q
.subroutine_def
) {
1008 printf("subroutine (");
1009 q
->subroutine_list
->print();
1013 if (q
->flags
.q
.constant
)
1016 if (q
->flags
.q
.invariant
)
1017 printf("invariant ");
1019 if (q
->flags
.q
.attribute
)
1020 printf("attribute ");
1022 if (q
->flags
.q
.varying
)
1025 if (q
->flags
.q
.in
&& q
->flags
.q
.out
)
1035 if (q
->flags
.q
.centroid
)
1036 printf("centroid ");
1037 if (q
->flags
.q
.sample
)
1039 if (q
->flags
.q
.patch
)
1041 if (q
->flags
.q
.uniform
)
1043 if (q
->flags
.q
.buffer
)
1045 if (q
->flags
.q
.smooth
)
1047 if (q
->flags
.q
.flat
)
1049 if (q
->flags
.q
.noperspective
)
1050 printf("noperspective ");
1055 ast_node::print(void) const
1057 printf("unhandled node ");
1061 ast_node::ast_node(void)
1063 this->location
.source
= 0;
1064 this->location
.first_line
= 0;
1065 this->location
.first_column
= 0;
1066 this->location
.last_line
= 0;
1067 this->location
.last_column
= 0;
1072 ast_opt_array_dimensions_print(const ast_array_specifier
*array_specifier
)
1074 if (array_specifier
)
1075 array_specifier
->print();
1080 ast_compound_statement::print(void) const
1084 foreach_list_typed(ast_node
, ast
, link
, &this->statements
) {
1092 ast_compound_statement::ast_compound_statement(int new_scope
,
1093 ast_node
*statements
)
1095 this->new_scope
= new_scope
;
1097 if (statements
!= NULL
) {
1098 this->statements
.push_degenerate_list_at_head(&statements
->link
);
1104 ast_expression::print(void) const
1108 case ast_mul_assign
:
1109 case ast_div_assign
:
1110 case ast_mod_assign
:
1111 case ast_add_assign
:
1112 case ast_sub_assign
:
1115 case ast_and_assign
:
1116 case ast_xor_assign
:
1118 subexpressions
[0]->print();
1119 printf("%s ", operator_string(oper
));
1120 subexpressions
[1]->print();
1123 case ast_field_selection
:
1124 subexpressions
[0]->print();
1125 printf(". %s ", primary_expression
.identifier
);
1134 printf("%s ", operator_string(oper
));
1135 subexpressions
[0]->print();
1140 subexpressions
[0]->print();
1141 printf("%s ", operator_string(oper
));
1144 case ast_conditional
:
1145 subexpressions
[0]->print();
1147 subexpressions
[1]->print();
1149 subexpressions
[2]->print();
1152 case ast_array_index
:
1153 subexpressions
[0]->print();
1155 subexpressions
[1]->print();
1159 case ast_function_call
: {
1160 subexpressions
[0]->print();
1163 foreach_list_typed (ast_node
, ast
, link
, &this->expressions
) {
1164 if (&ast
->link
!= this->expressions
.get_head())
1174 case ast_identifier
:
1175 printf("%s ", primary_expression
.identifier
);
1178 case ast_int_constant
:
1179 printf("%d ", primary_expression
.int_constant
);
1182 case ast_uint_constant
:
1183 printf("%u ", primary_expression
.uint_constant
);
1186 case ast_float_constant
:
1187 printf("%f ", primary_expression
.float_constant
);
1190 case ast_double_constant
:
1191 printf("%f ", primary_expression
.double_constant
);
1194 case ast_bool_constant
:
1196 primary_expression
.bool_constant
1197 ? "true" : "false");
1200 case ast_sequence
: {
1202 foreach_list_typed (ast_node
, ast
, link
, & this->expressions
) {
1203 if (&ast
->link
!= this->expressions
.get_head())
1212 case ast_aggregate
: {
1214 foreach_list_typed (ast_node
, ast
, link
, & this->expressions
) {
1215 if (&ast
->link
!= this->expressions
.get_head())
1230 ast_expression::ast_expression(int oper
,
1231 ast_expression
*ex0
,
1232 ast_expression
*ex1
,
1233 ast_expression
*ex2
) :
1234 primary_expression()
1236 this->oper
= ast_operators(oper
);
1237 this->subexpressions
[0] = ex0
;
1238 this->subexpressions
[1] = ex1
;
1239 this->subexpressions
[2] = ex2
;
1240 this->non_lvalue_description
= NULL
;
1245 ast_expression_statement::print(void) const
1248 expression
->print();
1254 ast_expression_statement::ast_expression_statement(ast_expression
*ex
) :
1262 ast_function::print(void) const
1264 return_type
->print();
1265 printf(" %s (", identifier
);
1267 foreach_list_typed(ast_node
, ast
, link
, & this->parameters
) {
1275 ast_function::ast_function(void)
1276 : return_type(NULL
), identifier(NULL
), is_definition(false),
1284 ast_fully_specified_type::print(void) const
1286 _mesa_ast_type_qualifier_print(& qualifier
);
1292 ast_parameter_declarator::print(void) const
1296 printf("%s ", identifier
);
1297 ast_opt_array_dimensions_print(array_specifier
);
1302 ast_function_definition::print(void) const
1310 ast_declaration::print(void) const
1312 printf("%s ", identifier
);
1313 ast_opt_array_dimensions_print(array_specifier
);
1317 initializer
->print();
1322 ast_declaration::ast_declaration(const char *identifier
,
1323 ast_array_specifier
*array_specifier
,
1324 ast_expression
*initializer
)
1326 this->identifier
= identifier
;
1327 this->array_specifier
= array_specifier
;
1328 this->initializer
= initializer
;
1333 ast_declarator_list::print(void) const
1335 assert(type
|| invariant
);
1340 printf("invariant ");
1344 foreach_list_typed (ast_node
, ast
, link
, & this->declarations
) {
1345 if (&ast
->link
!= this->declarations
.get_head())
1355 ast_declarator_list::ast_declarator_list(ast_fully_specified_type
*type
)
1358 this->invariant
= false;
1359 this->precise
= false;
1363 ast_jump_statement::print(void) const
1367 printf("continue; ");
1374 if (opt_return_value
)
1375 opt_return_value
->print();
1380 printf("discard; ");
1386 ast_jump_statement::ast_jump_statement(int mode
, ast_expression
*return_value
)
1387 : opt_return_value(NULL
)
1389 this->mode
= ast_jump_modes(mode
);
1391 if (mode
== ast_return
)
1392 opt_return_value
= return_value
;
1397 ast_selection_statement::print(void) const
1403 then_statement
->print();
1405 if (else_statement
) {
1407 else_statement
->print();
1413 ast_selection_statement::ast_selection_statement(ast_expression
*condition
,
1414 ast_node
*then_statement
,
1415 ast_node
*else_statement
)
1417 this->condition
= condition
;
1418 this->then_statement
= then_statement
;
1419 this->else_statement
= else_statement
;
1424 ast_switch_statement::print(void) const
1426 printf("switch ( ");
1427 test_expression
->print();
1434 ast_switch_statement::ast_switch_statement(ast_expression
*test_expression
,
1437 this->test_expression
= test_expression
;
1443 ast_switch_body::print(void) const
1446 if (stmts
!= NULL
) {
1453 ast_switch_body::ast_switch_body(ast_case_statement_list
*stmts
)
1455 this->stmts
= stmts
;
1459 void ast_case_label::print(void) const
1461 if (test_value
!= NULL
) {
1463 test_value
->print();
1466 printf("default: ");
1471 ast_case_label::ast_case_label(ast_expression
*test_value
)
1473 this->test_value
= test_value
;
1477 void ast_case_label_list::print(void) const
1479 foreach_list_typed(ast_node
, ast
, link
, & this->labels
) {
1486 ast_case_label_list::ast_case_label_list(void)
1491 void ast_case_statement::print(void) const
1494 foreach_list_typed(ast_node
, ast
, link
, & this->stmts
) {
1501 ast_case_statement::ast_case_statement(ast_case_label_list
*labels
)
1503 this->labels
= labels
;
1507 void ast_case_statement_list::print(void) const
1509 foreach_list_typed(ast_node
, ast
, link
, & this->cases
) {
1515 ast_case_statement_list::ast_case_statement_list(void)
1521 ast_iteration_statement::print(void) const
1527 init_statement
->print();
1534 if (rest_expression
)
1535 rest_expression
->print();
1561 ast_iteration_statement::ast_iteration_statement(int mode
,
1563 ast_node
*condition
,
1564 ast_expression
*rest_expression
,
1567 this->mode
= ast_iteration_modes(mode
);
1568 this->init_statement
= init
;
1569 this->condition
= condition
;
1570 this->rest_expression
= rest_expression
;
1576 ast_struct_specifier::print(void) const
1578 printf("struct %s { ", name
);
1579 foreach_list_typed(ast_node
, ast
, link
, &this->declarations
) {
1586 ast_struct_specifier::ast_struct_specifier(const char *identifier
,
1587 ast_declarator_list
*declarator_list
)
1589 if (identifier
== NULL
) {
1590 static mtx_t mutex
= _MTX_INITIALIZER_NP
;
1591 static unsigned anon_count
= 1;
1595 count
= anon_count
++;
1598 identifier
= ralloc_asprintf(this, "#anon_struct_%04x", count
);
1601 this->declarations
.push_degenerate_list_at_head(&declarator_list
->link
);
1602 is_declaration
= true;
1605 void ast_subroutine_list::print(void) const
1607 foreach_list_typed (ast_node
, ast
, link
, & this->declarations
) {
1608 if (&ast
->link
!= this->declarations
.get_head())
1615 set_shader_inout_layout(struct gl_shader
*shader
,
1616 struct _mesa_glsl_parse_state
*state
)
1618 /* Should have been prevented by the parser. */
1619 if (shader
->Stage
== MESA_SHADER_TESS_CTRL
) {
1620 assert(!state
->in_qualifier
->flags
.i
);
1621 } else if (shader
->Stage
== MESA_SHADER_TESS_EVAL
) {
1622 assert(!state
->out_qualifier
->flags
.i
);
1623 } else if (shader
->Stage
!= MESA_SHADER_GEOMETRY
) {
1624 assert(!state
->in_qualifier
->flags
.i
);
1625 assert(!state
->out_qualifier
->flags
.i
);
1628 if (shader
->Stage
!= MESA_SHADER_COMPUTE
) {
1629 /* Should have been prevented by the parser. */
1630 assert(!state
->cs_input_local_size_specified
);
1633 if (shader
->Stage
!= MESA_SHADER_FRAGMENT
) {
1634 /* Should have been prevented by the parser. */
1635 assert(!state
->fs_uses_gl_fragcoord
);
1636 assert(!state
->fs_redeclares_gl_fragcoord
);
1637 assert(!state
->fs_pixel_center_integer
);
1638 assert(!state
->fs_origin_upper_left
);
1639 assert(!state
->fs_early_fragment_tests
);
1642 switch (shader
->Stage
) {
1643 case MESA_SHADER_TESS_CTRL
:
1644 shader
->TessCtrl
.VerticesOut
= 0;
1645 if (state
->tcs_output_vertices_specified
)
1646 shader
->TessCtrl
.VerticesOut
= state
->out_qualifier
->vertices
;
1648 case MESA_SHADER_TESS_EVAL
:
1649 shader
->TessEval
.PrimitiveMode
= PRIM_UNKNOWN
;
1650 if (state
->in_qualifier
->flags
.q
.prim_type
)
1651 shader
->TessEval
.PrimitiveMode
= state
->in_qualifier
->prim_type
;
1653 shader
->TessEval
.Spacing
= 0;
1654 if (state
->in_qualifier
->flags
.q
.vertex_spacing
)
1655 shader
->TessEval
.Spacing
= state
->in_qualifier
->vertex_spacing
;
1657 shader
->TessEval
.VertexOrder
= 0;
1658 if (state
->in_qualifier
->flags
.q
.ordering
)
1659 shader
->TessEval
.VertexOrder
= state
->in_qualifier
->ordering
;
1661 shader
->TessEval
.PointMode
= -1;
1662 if (state
->in_qualifier
->flags
.q
.point_mode
)
1663 shader
->TessEval
.PointMode
= state
->in_qualifier
->point_mode
;
1665 case MESA_SHADER_GEOMETRY
:
1666 shader
->Geom
.VerticesOut
= 0;
1667 if (state
->out_qualifier
->flags
.q
.max_vertices
)
1668 shader
->Geom
.VerticesOut
= state
->out_qualifier
->max_vertices
;
1670 if (state
->gs_input_prim_type_specified
) {
1671 shader
->Geom
.InputType
= state
->in_qualifier
->prim_type
;
1673 shader
->Geom
.InputType
= PRIM_UNKNOWN
;
1676 if (state
->out_qualifier
->flags
.q
.prim_type
) {
1677 shader
->Geom
.OutputType
= state
->out_qualifier
->prim_type
;
1679 shader
->Geom
.OutputType
= PRIM_UNKNOWN
;
1682 shader
->Geom
.Invocations
= 0;
1683 if (state
->in_qualifier
->flags
.q
.invocations
)
1684 shader
->Geom
.Invocations
= state
->in_qualifier
->invocations
;
1687 case MESA_SHADER_COMPUTE
:
1688 if (state
->cs_input_local_size_specified
) {
1689 for (int i
= 0; i
< 3; i
++)
1690 shader
->Comp
.LocalSize
[i
] = state
->cs_input_local_size
[i
];
1692 for (int i
= 0; i
< 3; i
++)
1693 shader
->Comp
.LocalSize
[i
] = 0;
1697 case MESA_SHADER_FRAGMENT
:
1698 shader
->redeclares_gl_fragcoord
= state
->fs_redeclares_gl_fragcoord
;
1699 shader
->uses_gl_fragcoord
= state
->fs_uses_gl_fragcoord
;
1700 shader
->pixel_center_integer
= state
->fs_pixel_center_integer
;
1701 shader
->origin_upper_left
= state
->fs_origin_upper_left
;
1702 shader
->ARB_fragment_coord_conventions_enable
=
1703 state
->ARB_fragment_coord_conventions_enable
;
1704 shader
->EarlyFragmentTests
= state
->fs_early_fragment_tests
;
1708 /* Nothing to do. */
1716 _mesa_glsl_compile_shader(struct gl_context
*ctx
, struct gl_shader
*shader
,
1717 bool dump_ast
, bool dump_hir
)
1719 struct _mesa_glsl_parse_state
*state
=
1720 new(shader
) _mesa_glsl_parse_state(ctx
, shader
->Stage
, shader
);
1721 const char *source
= shader
->Source
;
1723 if (ctx
->Const
.GenerateTemporaryNames
)
1724 (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names
,
1727 state
->error
= glcpp_preprocess(state
, &source
, &state
->info_log
,
1728 &ctx
->Extensions
, ctx
);
1730 if (!state
->error
) {
1731 _mesa_glsl_lexer_ctor(state
, source
);
1732 _mesa_glsl_parse(state
);
1733 _mesa_glsl_lexer_dtor(state
);
1737 foreach_list_typed(ast_node
, ast
, link
, &state
->translation_unit
) {
1743 ralloc_free(shader
->ir
);
1744 shader
->ir
= new(shader
) exec_list
;
1745 if (!state
->error
&& !state
->translation_unit
.is_empty())
1746 _mesa_ast_to_hir(shader
->ir
, state
);
1748 if (!state
->error
) {
1749 validate_ir_tree(shader
->ir
);
1751 /* Print out the unoptimized IR. */
1753 _mesa_print_ir(stdout
, shader
->ir
, state
);
1758 if (!state
->error
&& !shader
->ir
->is_empty()) {
1759 struct gl_shader_compiler_options
*options
=
1760 &ctx
->Const
.ShaderCompilerOptions
[shader
->Stage
];
1762 lower_subroutine(shader
->ir
, state
);
1763 /* Do some optimization at compile time to reduce shader IR size
1764 * and reduce later work if the same shader is linked multiple times
1766 while (do_common_optimization(shader
->ir
, false, false, options
,
1767 ctx
->Const
.NativeIntegers
))
1770 validate_ir_tree(shader
->ir
);
1772 enum ir_variable_mode other
;
1773 switch (shader
->Stage
) {
1774 case MESA_SHADER_VERTEX
:
1775 other
= ir_var_shader_in
;
1777 case MESA_SHADER_FRAGMENT
:
1778 other
= ir_var_shader_out
;
1781 /* Something invalid to ensure optimize_dead_builtin_uniforms
1782 * doesn't remove anything other than uniforms or constants.
1784 other
= ir_var_mode_count
;
1788 optimize_dead_builtin_variables(shader
->ir
, other
);
1790 validate_ir_tree(shader
->ir
);
1793 if (shader
->InfoLog
)
1794 ralloc_free(shader
->InfoLog
);
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
;
1804 set_shader_inout_layout(shader
, state
);
1806 /* Retain any live IR, but trash the rest. */
1807 reparent_ir(shader
->ir
, shader
->ir
);
1809 /* Destroy the symbol table. Create a new symbol table that contains only
1810 * the variables and functions that still exist in the IR. The symbol
1811 * table will be used later during linking.
1813 * There must NOT be any freed objects still referenced by the symbol
1814 * table. That could cause the linker to dereference freed memory.
1816 * We don't have to worry about types or interface-types here because those
1817 * are fly-weights that are looked up by glsl_type.
1819 foreach_in_list (ir_instruction
, ir
, shader
->ir
) {
1820 switch (ir
->ir_type
) {
1821 case ir_type_function
:
1822 shader
->symbols
->add_function((ir_function
*) ir
);
1824 case ir_type_variable
: {
1825 ir_variable
*const var
= (ir_variable
*) ir
;
1827 if (var
->data
.mode
!= ir_var_temporary
)
1828 shader
->symbols
->add_variable(var
);
1836 _mesa_glsl_initialize_derived_variables(shader
);
1838 delete state
->symbols
;
1844 * Do the set of common optimizations passes
1846 * \param ir List of instructions to be optimized
1847 * \param linked Is the shader linked? This enables
1848 * optimizations passes that remove code at
1849 * global scope and could cause linking to
1851 * \param uniform_locations_assigned Have locations already been assigned for
1852 * uniforms? This prevents the declarations
1853 * of unused uniforms from being removed.
1854 * The setting of this flag only matters if
1855 * \c linked is \c true.
1856 * \param max_unroll_iterations Maximum number of loop iterations to be
1857 * unrolled. Setting to 0 disables loop
1859 * \param options The driver's preferred shader options.
1862 do_common_optimization(exec_list
*ir
, bool linked
,
1863 bool uniform_locations_assigned
,
1864 const struct gl_shader_compiler_options
*options
,
1865 bool native_integers
)
1867 GLboolean progress
= GL_FALSE
;
1869 progress
= lower_instructions(ir
, SUB_TO_ADD_NEG
) || progress
;
1872 progress
= do_function_inlining(ir
) || progress
;
1873 progress
= do_dead_functions(ir
) || progress
;
1874 progress
= do_structure_splitting(ir
) || progress
;
1876 progress
= do_if_simplification(ir
) || progress
;
1877 progress
= opt_flatten_nested_if_blocks(ir
) || progress
;
1878 progress
= opt_conditional_discard(ir
) || progress
;
1879 progress
= do_copy_propagation(ir
) || progress
;
1880 progress
= do_copy_propagation_elements(ir
) || progress
;
1882 if (options
->OptimizeForAOS
&& !linked
)
1883 progress
= opt_flip_matrices(ir
) || progress
;
1885 if (linked
&& options
->OptimizeForAOS
) {
1886 progress
= do_vectorize(ir
) || progress
;
1890 progress
= do_dead_code(ir
, uniform_locations_assigned
) || progress
;
1892 progress
= do_dead_code_unlinked(ir
) || progress
;
1893 progress
= do_dead_code_local(ir
) || progress
;
1894 progress
= do_tree_grafting(ir
) || progress
;
1895 progress
= do_constant_propagation(ir
) || progress
;
1897 progress
= do_constant_variable(ir
) || progress
;
1899 progress
= do_constant_variable_unlinked(ir
) || progress
;
1900 progress
= do_constant_folding(ir
) || progress
;
1901 progress
= do_minmax_prune(ir
) || progress
;
1902 progress
= do_rebalance_tree(ir
) || progress
;
1903 progress
= do_algebraic(ir
, native_integers
, options
) || progress
;
1904 progress
= do_lower_jumps(ir
) || progress
;
1905 progress
= do_vec_index_to_swizzle(ir
) || progress
;
1906 progress
= lower_vector_insert(ir
, false) || progress
;
1907 progress
= do_swizzle_swizzle(ir
) || progress
;
1908 progress
= do_noop_swizzle(ir
) || progress
;
1910 progress
= optimize_split_arrays(ir
, linked
) || progress
;
1911 progress
= optimize_redundant_jumps(ir
) || progress
;
1913 loop_state
*ls
= analyze_loop_variables(ir
);
1914 if (ls
->loop_found
) {
1915 progress
= set_loop_controls(ir
, ls
) || progress
;
1916 progress
= unroll_loops(ir
, ls
, options
) || progress
;
1926 * To be called at GL teardown time, this frees compiler datastructures.
1928 * After calling this, any previously compiled shaders and shader
1929 * programs would be invalid. So this should happen at approximately
1933 _mesa_destroy_shader_compiler(void)
1935 _mesa_destroy_shader_compiler_caches();
1937 _mesa_glsl_release_types();
1941 * Releases compiler caches to trade off performance for memory.
1943 * Intended to be used with glReleaseShaderCompiler().
1946 _mesa_destroy_shader_compiler_caches(void)
1948 _mesa_glsl_release_builtin_functions();