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.
29 #include "main/core.h" /* for struct gl_context */
30 #include "main/context.h"
31 #include "main/shaderobj.h"
36 #include "glsl_parser_extras.h"
37 #include "glsl_parser.h"
38 #include "ir_optimization.h"
39 #include "loop_analysis.h"
42 * Format a short human-readable description of the given GLSL version.
45 glsl_compute_version_string(void *mem_ctx
, bool is_es
, unsigned version
)
47 return ralloc_asprintf(mem_ctx
, "GLSL%s %d.%02d", is_es
? " ES" : "",
48 version
/ 100, version
% 100);
52 static const unsigned known_desktop_glsl_versions
[] =
53 { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440 };
56 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context
*_ctx
,
57 gl_shader_stage stage
,
59 : ctx(_ctx
), cs_input_local_size_specified(false), cs_input_local_size(),
62 assert(stage
< MESA_SHADER_STAGES
);
66 this->translation_unit
.make_empty();
67 this->symbols
= new(mem_ctx
) glsl_symbol_table
;
69 this->info_log
= ralloc_strdup(mem_ctx
, "");
71 this->loop_nesting_ast
= NULL
;
73 this->struct_specifier_depth
= 0;
75 this->uses_builtin_functions
= false;
77 /* Set default language version and extensions */
78 this->language_version
= ctx
->Const
.ForceGLSLVersion
?
79 ctx
->Const
.ForceGLSLVersion
: 110;
80 this->es_shader
= false;
81 this->ARB_texture_rectangle_enable
= true;
83 /* OpenGL ES 2.0 has different defaults from desktop GL. */
84 if (ctx
->API
== API_OPENGLES2
) {
85 this->language_version
= 100;
86 this->es_shader
= true;
87 this->ARB_texture_rectangle_enable
= false;
90 this->extensions
= &ctx
->Extensions
;
92 this->Const
.MaxLights
= ctx
->Const
.MaxLights
;
93 this->Const
.MaxClipPlanes
= ctx
->Const
.MaxClipPlanes
;
94 this->Const
.MaxTextureUnits
= ctx
->Const
.MaxTextureUnits
;
95 this->Const
.MaxTextureCoords
= ctx
->Const
.MaxTextureCoordUnits
;
96 this->Const
.MaxVertexAttribs
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAttribs
;
97 this->Const
.MaxVertexUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxUniformComponents
;
98 this->Const
.MaxVertexTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
;
99 this->Const
.MaxCombinedTextureImageUnits
= ctx
->Const
.MaxCombinedTextureImageUnits
;
100 this->Const
.MaxTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
;
101 this->Const
.MaxFragmentUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxUniformComponents
;
102 this->Const
.MinProgramTexelOffset
= ctx
->Const
.MinProgramTexelOffset
;
103 this->Const
.MaxProgramTexelOffset
= ctx
->Const
.MaxProgramTexelOffset
;
105 this->Const
.MaxDrawBuffers
= ctx
->Const
.MaxDrawBuffers
;
108 this->Const
.MaxVertexOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxOutputComponents
;
109 this->Const
.MaxGeometryInputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxInputComponents
;
110 this->Const
.MaxGeometryOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxOutputComponents
;
111 this->Const
.MaxFragmentInputComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxInputComponents
;
112 this->Const
.MaxGeometryTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
;
113 this->Const
.MaxGeometryOutputVertices
= ctx
->Const
.MaxGeometryOutputVertices
;
114 this->Const
.MaxGeometryTotalOutputComponents
= ctx
->Const
.MaxGeometryTotalOutputComponents
;
115 this->Const
.MaxGeometryUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxUniformComponents
;
117 this->Const
.MaxVertexAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].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
;
123 /* Compute shader constants */
124 for (unsigned i
= 0; i
< Elements(this->Const
.MaxComputeWorkGroupCount
); i
++)
125 this->Const
.MaxComputeWorkGroupCount
[i
] = ctx
->Const
.MaxComputeWorkGroupCount
[i
];
126 for (unsigned i
= 0; i
< Elements(this->Const
.MaxComputeWorkGroupSize
); i
++)
127 this->Const
.MaxComputeWorkGroupSize
[i
] = ctx
->Const
.MaxComputeWorkGroupSize
[i
];
129 this->Const
.MaxImageUnits
= ctx
->Const
.MaxImageUnits
;
130 this->Const
.MaxCombinedImageUnitsAndFragmentOutputs
= ctx
->Const
.MaxCombinedImageUnitsAndFragmentOutputs
;
131 this->Const
.MaxImageSamples
= ctx
->Const
.MaxImageSamples
;
132 this->Const
.MaxVertexImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxImageUniforms
;
133 this->Const
.MaxGeometryImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxImageUniforms
;
134 this->Const
.MaxFragmentImageUniforms
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxImageUniforms
;
135 this->Const
.MaxCombinedImageUniforms
= ctx
->Const
.MaxCombinedImageUniforms
;
137 this->current_function
= NULL
;
138 this->toplevel_ir
= NULL
;
139 this->found_return
= false;
140 this->all_invariant
= false;
141 this->user_structures
= NULL
;
142 this->num_user_structures
= 0;
144 /* Populate the list of supported GLSL versions */
145 /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
146 * the OpenGL 3.2 Core context is supported, this logic will need
147 * change. Older versions of GLSL are no longer supported
148 * outside the compatibility contexts of 3.x.
150 this->num_supported_versions
= 0;
151 if (_mesa_is_desktop_gl(ctx
)) {
152 for (unsigned i
= 0; i
< ARRAY_SIZE(known_desktop_glsl_versions
); i
++) {
153 if (known_desktop_glsl_versions
[i
] <= ctx
->Const
.GLSLVersion
) {
154 this->supported_versions
[this->num_supported_versions
].ver
155 = known_desktop_glsl_versions
[i
];
156 this->supported_versions
[this->num_supported_versions
].es
= false;
157 this->num_supported_versions
++;
161 if (ctx
->API
== API_OPENGLES2
|| ctx
->Extensions
.ARB_ES2_compatibility
) {
162 this->supported_versions
[this->num_supported_versions
].ver
= 100;
163 this->supported_versions
[this->num_supported_versions
].es
= true;
164 this->num_supported_versions
++;
166 if (_mesa_is_gles3(ctx
) || ctx
->Extensions
.ARB_ES3_compatibility
) {
167 this->supported_versions
[this->num_supported_versions
].ver
= 300;
168 this->supported_versions
[this->num_supported_versions
].es
= true;
169 this->num_supported_versions
++;
171 assert(this->num_supported_versions
172 <= ARRAY_SIZE(this->supported_versions
));
174 /* Create a string for use in error messages to tell the user which GLSL
175 * versions are supported.
177 char *supported
= ralloc_strdup(this, "");
178 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
179 unsigned ver
= this->supported_versions
[i
].ver
;
180 const char *const prefix
= (i
== 0)
182 : ((i
== this->num_supported_versions
- 1) ? ", and " : ", ");
183 const char *const suffix
= (this->supported_versions
[i
].es
) ? " ES" : "";
185 ralloc_asprintf_append(& supported
, "%s%u.%02u%s",
187 ver
/ 100, ver
% 100,
191 this->supported_version_string
= supported
;
193 if (ctx
->Const
.ForceGLSLExtensionsWarn
)
194 _mesa_glsl_process_extension("all", NULL
, "warn", NULL
, this);
196 this->default_uniform_qualifier
= new(this) ast_type_qualifier();
197 this->default_uniform_qualifier
->flags
.q
.shared
= 1;
198 this->default_uniform_qualifier
->flags
.q
.column_major
= 1;
200 this->fs_uses_gl_fragcoord
= false;
201 this->fs_redeclares_gl_fragcoord
= false;
202 this->fs_origin_upper_left
= false;
203 this->fs_pixel_center_integer
= false;
204 this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers
= false;
206 this->gs_input_prim_type_specified
= false;
207 this->gs_input_size
= 0;
208 this->in_qualifier
= new(this) ast_type_qualifier();
209 this->out_qualifier
= new(this) ast_type_qualifier();
210 this->early_fragment_tests
= false;
211 memset(this->atomic_counter_offsets
, 0,
212 sizeof(this->atomic_counter_offsets
));
216 * Determine whether the current GLSL version is sufficiently high to support
217 * a certain feature, and generate an error message if it isn't.
219 * \param required_glsl_version and \c required_glsl_es_version are
220 * interpreted as they are in _mesa_glsl_parse_state::is_version().
222 * \param locp is the parser location where the error should be reported.
224 * \param fmt (and additional arguments) constitute a printf-style error
225 * message to report if the version check fails. Information about the
226 * current and required GLSL versions will be appended. So, for example, if
227 * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
228 * "foo unsupported") is called, the error message will be "foo unsupported in
229 * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
232 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version
,
233 unsigned required_glsl_es_version
,
234 YYLTYPE
*locp
, const char *fmt
, ...)
236 if (this->is_version(required_glsl_version
, required_glsl_es_version
))
241 char *problem
= ralloc_vasprintf(this, fmt
, args
);
243 const char *glsl_version_string
244 = glsl_compute_version_string(this, false, required_glsl_version
);
245 const char *glsl_es_version_string
246 = glsl_compute_version_string(this, true, required_glsl_es_version
);
247 const char *requirement_string
= "";
248 if (required_glsl_version
&& required_glsl_es_version
) {
249 requirement_string
= ralloc_asprintf(this, " (%s or %s required)",
251 glsl_es_version_string
);
252 } else if (required_glsl_version
) {
253 requirement_string
= ralloc_asprintf(this, " (%s required)",
254 glsl_version_string
);
255 } else if (required_glsl_es_version
) {
256 requirement_string
= ralloc_asprintf(this, " (%s required)",
257 glsl_es_version_string
);
259 _mesa_glsl_error(locp
, this, "%s in %s%s",
260 problem
, this->get_version_string(),
267 * Process a GLSL #version directive.
269 * \param version is the integer that follows the #version token.
271 * \param ident is a string identifier that follows the integer, if any is
272 * present. Otherwise NULL.
275 _mesa_glsl_parse_state::process_version_directive(YYLTYPE
*locp
, int version
,
278 bool es_token_present
= false;
280 if (strcmp(ident
, "es") == 0) {
281 es_token_present
= true;
282 } else if (version
>= 150) {
283 if (strcmp(ident
, "core") == 0) {
284 /* Accept the token. There's no need to record that this is
285 * a core profile shader since that's the only profile we support.
287 } else if (strcmp(ident
, "compatibility") == 0) {
288 _mesa_glsl_error(locp
, this,
289 "the compatibility profile is not supported");
291 _mesa_glsl_error(locp
, this,
292 "\"%s\" is not a valid shading language profile; "
293 "if present, it must be \"core\"", ident
);
296 _mesa_glsl_error(locp
, this,
297 "illegal text following version number");
301 this->es_shader
= es_token_present
;
302 if (version
== 100) {
303 if (es_token_present
) {
304 _mesa_glsl_error(locp
, this,
305 "GLSL 1.00 ES should be selected using "
308 this->es_shader
= true;
312 if (this->es_shader
) {
313 this->ARB_texture_rectangle_enable
= false;
316 this->language_version
= version
;
318 bool supported
= false;
319 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
320 if (this->supported_versions
[i
].ver
== (unsigned) version
321 && this->supported_versions
[i
].es
== this->es_shader
) {
328 _mesa_glsl_error(locp
, this, "%s is not supported. "
329 "Supported versions are: %s",
330 this->get_version_string(),
331 this->supported_version_string
);
333 /* On exit, the language_version must be set to a valid value.
334 * Later calls to _mesa_glsl_initialize_types will misbehave if
335 * the version is invalid.
337 switch (this->ctx
->API
) {
338 case API_OPENGL_COMPAT
:
339 case API_OPENGL_CORE
:
340 this->language_version
= this->ctx
->Const
.GLSLVersion
;
344 assert(!"Should not get here.");
348 this->language_version
= 100;
356 * Translate a gl_shader_stage to a short shader stage name for debug
357 * printouts and error messages.
360 _mesa_shader_stage_to_string(unsigned stage
)
363 case MESA_SHADER_VERTEX
: return "vertex";
364 case MESA_SHADER_FRAGMENT
: return "fragment";
365 case MESA_SHADER_GEOMETRY
: return "geometry";
368 assert(!"Should not get here.");
372 /* This helper function will append the given message to the shader's
373 info log and report it via GL_ARB_debug_output. Per that extension,
374 'type' is one of the enum values classifying the message, and
375 'id' is the implementation-defined ID of the given message. */
377 _mesa_glsl_msg(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
378 GLenum type
, const char *fmt
, va_list ap
)
380 bool error
= (type
== MESA_DEBUG_TYPE_ERROR
);
383 assert(state
->info_log
!= NULL
);
385 /* Get the offset that the new message will be written to. */
386 int msg_offset
= strlen(state
->info_log
);
388 ralloc_asprintf_append(&state
->info_log
, "%u:%u(%u): %s: ",
392 error
? "error" : "warning");
393 ralloc_vasprintf_append(&state
->info_log
, fmt
, ap
);
395 const char *const msg
= &state
->info_log
[msg_offset
];
396 struct gl_context
*ctx
= state
->ctx
;
398 /* Report the error via GL_ARB_debug_output. */
399 _mesa_shader_debug(ctx
, type
, &msg_id
, msg
, strlen(msg
));
401 ralloc_strcat(&state
->info_log
, "\n");
405 _mesa_glsl_error(YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
406 const char *fmt
, ...)
413 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_ERROR
, fmt
, ap
);
419 _mesa_glsl_warning(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
420 const char *fmt
, ...)
425 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_OTHER
, fmt
, ap
);
431 * Enum representing the possible behaviors that can be specified in
432 * an #extension directive.
442 * Element type for _mesa_glsl_supported_extensions
444 struct _mesa_glsl_extension
{
446 * Name of the extension when referred to in a GLSL extension
451 /** True if this extension is available to desktop GL shaders */
454 /** True if this extension is available to GLES shaders */
458 * Flag in the gl_extensions struct indicating whether this
459 * extension is supported by the driver, or
460 * &gl_extensions::dummy_true if supported by all drivers.
462 * Note: the type (GLboolean gl_extensions::*) is a "pointer to
463 * member" type, the type-safe alternative to the "offsetof" macro.
466 * - foo bar::* p declares p to be an "offset" to a field of type
467 * foo that exists within struct bar
468 * - &bar::baz computes the "offset" of field baz within struct bar
469 * - x.*p accesses the field of x that exists at "offset" p
470 * - x->*p is equivalent to (*x).*p
472 const GLboolean
gl_extensions::* supported_flag
;
475 * Flag in the _mesa_glsl_parse_state struct that should be set
476 * when this extension is enabled.
478 * See note in _mesa_glsl_extension::supported_flag about "pointer
481 bool _mesa_glsl_parse_state::* enable_flag
;
484 * Flag in the _mesa_glsl_parse_state struct that should be set
485 * when the shader requests "warn" behavior for this extension.
487 * See note in _mesa_glsl_extension::supported_flag about "pointer
490 bool _mesa_glsl_parse_state::* warn_flag
;
493 bool compatible_with_state(const _mesa_glsl_parse_state
*state
) const;
494 void set_flags(_mesa_glsl_parse_state
*state
, ext_behavior behavior
) const;
497 #define EXT(NAME, GL, ES, SUPPORTED_FLAG) \
498 { "GL_" #NAME, GL, ES, &gl_extensions::SUPPORTED_FLAG, \
499 &_mesa_glsl_parse_state::NAME##_enable, \
500 &_mesa_glsl_parse_state::NAME##_warn }
503 * Table of extensions that can be enabled/disabled within a shader,
504 * and the conditions under which they are supported.
506 static const _mesa_glsl_extension _mesa_glsl_supported_extensions
[] = {
507 /* API availability */
508 /* name GL ES supported flag */
510 /* ARB extensions go here, sorted alphabetically.
512 EXT(ARB_arrays_of_arrays
, true, false, ARB_arrays_of_arrays
),
513 EXT(ARB_compute_shader
, true, false, ARB_compute_shader
),
514 EXT(ARB_conservative_depth
, true, false, ARB_conservative_depth
),
515 EXT(ARB_draw_buffers
, true, false, dummy_true
),
516 EXT(ARB_draw_instanced
, true, false, ARB_draw_instanced
),
517 EXT(ARB_explicit_attrib_location
, true, false, ARB_explicit_attrib_location
),
518 EXT(ARB_fragment_coord_conventions
, true, false, ARB_fragment_coord_conventions
),
519 EXT(ARB_gpu_shader5
, true, false, ARB_gpu_shader5
),
520 EXT(ARB_sample_shading
, true, false, ARB_sample_shading
),
521 EXT(ARB_separate_shader_objects
, true, false, dummy_true
),
522 EXT(ARB_shader_atomic_counters
, true, false, ARB_shader_atomic_counters
),
523 EXT(ARB_shader_bit_encoding
, true, false, ARB_shader_bit_encoding
),
524 EXT(ARB_shader_image_load_store
, true, false, ARB_shader_image_load_store
),
525 EXT(ARB_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
526 EXT(ARB_shader_texture_lod
, true, false, ARB_shader_texture_lod
),
527 EXT(ARB_shading_language_420pack
, true, false, ARB_shading_language_420pack
),
528 EXT(ARB_shading_language_packing
, true, false, ARB_shading_language_packing
),
529 EXT(ARB_texture_cube_map_array
, true, false, ARB_texture_cube_map_array
),
530 EXT(ARB_texture_gather
, true, false, ARB_texture_gather
),
531 EXT(ARB_texture_multisample
, true, false, ARB_texture_multisample
),
532 EXT(ARB_texture_query_levels
, true, false, ARB_texture_query_levels
),
533 EXT(ARB_texture_query_lod
, true, false, ARB_texture_query_lod
),
534 EXT(ARB_texture_rectangle
, true, false, dummy_true
),
535 EXT(ARB_uniform_buffer_object
, true, false, ARB_uniform_buffer_object
),
536 EXT(ARB_viewport_array
, true, false, ARB_viewport_array
),
538 /* KHR extensions go here, sorted alphabetically.
541 /* OES extensions go here, sorted alphabetically.
543 EXT(OES_EGL_image_external
, false, true, OES_EGL_image_external
),
544 EXT(OES_standard_derivatives
, false, true, OES_standard_derivatives
),
545 EXT(OES_texture_3D
, false, true, EXT_texture3D
),
547 /* All other extensions go here, sorted alphabetically.
549 EXT(AMD_conservative_depth
, true, false, ARB_conservative_depth
),
550 EXT(AMD_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
551 EXT(AMD_shader_trinary_minmax
, true, false, dummy_true
),
552 EXT(AMD_vertex_shader_layer
, true, false, AMD_vertex_shader_layer
),
553 EXT(EXT_separate_shader_objects
, false, true, dummy_true
),
554 EXT(EXT_shader_integer_mix
, true, true, EXT_shader_integer_mix
),
555 EXT(EXT_texture_array
, true, false, EXT_texture_array
),
562 * Determine whether a given extension is compatible with the target,
563 * API, and extension information in the current parser state.
565 bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state
*
568 /* Check that this extension matches whether we are compiling
569 * for desktop GL or GLES.
571 if (state
->es_shader
) {
572 if (!this->avail_in_ES
) return false;
574 if (!this->avail_in_GL
) return false;
577 /* Check that this extension is supported by the OpenGL
580 * Note: the ->* operator indexes into state->extensions by the
581 * offset this->supported_flag. See
582 * _mesa_glsl_extension::supported_flag for more info.
584 return state
->extensions
->*(this->supported_flag
);
588 * Set the appropriate flags in the parser state to establish the
589 * given behavior for this extension.
591 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state
*state
,
592 ext_behavior behavior
) const
594 /* Note: the ->* operator indexes into state by the
595 * offsets this->enable_flag and this->warn_flag. See
596 * _mesa_glsl_extension::supported_flag for more info.
598 state
->*(this->enable_flag
) = (behavior
!= extension_disable
);
599 state
->*(this->warn_flag
) = (behavior
== extension_warn
);
603 * Find an extension by name in _mesa_glsl_supported_extensions. If
604 * the name is not found, return NULL.
606 static const _mesa_glsl_extension
*find_extension(const char *name
)
608 for (unsigned i
= 0; i
< Elements(_mesa_glsl_supported_extensions
); ++i
) {
609 if (strcmp(name
, _mesa_glsl_supported_extensions
[i
].name
) == 0) {
610 return &_mesa_glsl_supported_extensions
[i
];
618 _mesa_glsl_process_extension(const char *name
, YYLTYPE
*name_locp
,
619 const char *behavior_string
, YYLTYPE
*behavior_locp
,
620 _mesa_glsl_parse_state
*state
)
622 ext_behavior behavior
;
623 if (strcmp(behavior_string
, "warn") == 0) {
624 behavior
= extension_warn
;
625 } else if (strcmp(behavior_string
, "require") == 0) {
626 behavior
= extension_require
;
627 } else if (strcmp(behavior_string
, "enable") == 0) {
628 behavior
= extension_enable
;
629 } else if (strcmp(behavior_string
, "disable") == 0) {
630 behavior
= extension_disable
;
632 _mesa_glsl_error(behavior_locp
, state
,
633 "unknown extension behavior `%s'",
638 if (strcmp(name
, "all") == 0) {
639 if ((behavior
== extension_enable
) || (behavior
== extension_require
)) {
640 _mesa_glsl_error(name_locp
, state
, "cannot %s all extensions",
641 (behavior
== extension_enable
)
642 ? "enable" : "require");
646 i
< Elements(_mesa_glsl_supported_extensions
); ++i
) {
647 const _mesa_glsl_extension
*extension
648 = &_mesa_glsl_supported_extensions
[i
];
649 if (extension
->compatible_with_state(state
)) {
650 _mesa_glsl_supported_extensions
[i
].set_flags(state
, behavior
);
655 const _mesa_glsl_extension
*extension
= find_extension(name
);
656 if (extension
&& extension
->compatible_with_state(state
)) {
657 extension
->set_flags(state
, behavior
);
659 static const char fmt
[] = "extension `%s' unsupported in %s shader";
661 if (behavior
== extension_require
) {
662 _mesa_glsl_error(name_locp
, state
, fmt
,
663 name
, _mesa_shader_stage_to_string(state
->stage
));
666 _mesa_glsl_warning(name_locp
, state
, fmt
,
667 name
, _mesa_shader_stage_to_string(state
->stage
));
677 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
678 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
679 * (process_array_constructor, et al) sufficient information to do type
682 * Operates on assignments involving an aggregate initializer. E.g.,
684 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
686 * or more ridiculously,
699 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
700 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
705 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
706 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
712 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
713 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
719 * This pass is necessary because the right-hand side of <type> e = { ... }
720 * doesn't contain sufficient information to determine if the types match.
723 _mesa_ast_set_aggregate_type(const glsl_type
*type
,
724 ast_expression
*expr
)
726 ast_aggregate_initializer
*ai
= (ast_aggregate_initializer
*)expr
;
727 ai
->constructor_type
= type
;
729 /* If the aggregate is an array, recursively set its elements' types. */
730 if (type
->is_array()) {
731 /* Each array element has the type type->element_type().
733 * E.g., if <type> if struct S[2] we want to set each element's type to
736 for (exec_node
*expr_node
= ai
->expressions
.head
;
737 !expr_node
->is_tail_sentinel();
738 expr_node
= expr_node
->next
) {
739 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
742 if (expr
->oper
== ast_aggregate
)
743 _mesa_ast_set_aggregate_type(type
->element_type(), expr
);
746 /* If the aggregate is a struct, recursively set its fields' types. */
747 } else if (type
->is_record()) {
748 exec_node
*expr_node
= ai
->expressions
.head
;
750 /* Iterate through the struct's fields. */
751 for (unsigned i
= 0; !expr_node
->is_tail_sentinel() && i
< type
->length
;
752 i
++, expr_node
= expr_node
->next
) {
753 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
756 if (expr
->oper
== ast_aggregate
) {
757 _mesa_ast_set_aggregate_type(type
->fields
.structure
[i
].type
, expr
);
760 /* If the aggregate is a matrix, set its columns' types. */
761 } else if (type
->is_matrix()) {
762 for (exec_node
*expr_node
= ai
->expressions
.head
;
763 !expr_node
->is_tail_sentinel();
764 expr_node
= expr_node
->next
) {
765 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
768 if (expr
->oper
== ast_aggregate
)
769 _mesa_ast_set_aggregate_type(type
->column_type(), expr
);
776 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier
*q
)
778 if (q
->flags
.q
.constant
)
781 if (q
->flags
.q
.invariant
)
782 printf("invariant ");
784 if (q
->flags
.q
.attribute
)
785 printf("attribute ");
787 if (q
->flags
.q
.varying
)
790 if (q
->flags
.q
.in
&& q
->flags
.q
.out
)
800 if (q
->flags
.q
.centroid
)
802 if (q
->flags
.q
.sample
)
804 if (q
->flags
.q
.uniform
)
806 if (q
->flags
.q
.smooth
)
810 if (q
->flags
.q
.noperspective
)
811 printf("noperspective ");
816 ast_node::print(void) const
818 printf("unhandled node ");
822 ast_node::ast_node(void)
824 this->location
.source
= 0;
825 this->location
.first_line
= 0;
826 this->location
.first_column
= 0;
827 this->location
.last_line
= 0;
828 this->location
.last_column
= 0;
833 ast_opt_array_dimensions_print(const ast_array_specifier
*array_specifier
)
836 array_specifier
->print();
841 ast_compound_statement::print(void) const
845 foreach_list_const(n
, &this->statements
) {
846 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
854 ast_compound_statement::ast_compound_statement(int new_scope
,
855 ast_node
*statements
)
857 this->new_scope
= new_scope
;
859 if (statements
!= NULL
) {
860 this->statements
.push_degenerate_list_at_head(&statements
->link
);
866 ast_expression::print(void) const
880 subexpressions
[0]->print();
881 printf("%s ", operator_string(oper
));
882 subexpressions
[1]->print();
885 case ast_field_selection
:
886 subexpressions
[0]->print();
887 printf(". %s ", primary_expression
.identifier
);
896 printf("%s ", operator_string(oper
));
897 subexpressions
[0]->print();
902 subexpressions
[0]->print();
903 printf("%s ", operator_string(oper
));
906 case ast_conditional
:
907 subexpressions
[0]->print();
909 subexpressions
[1]->print();
911 subexpressions
[2]->print();
914 case ast_array_index
:
915 subexpressions
[0]->print();
917 subexpressions
[1]->print();
921 case ast_function_call
: {
922 subexpressions
[0]->print();
925 foreach_list_const (n
, &this->expressions
) {
926 if (n
!= this->expressions
.get_head())
929 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
938 printf("%s ", primary_expression
.identifier
);
941 case ast_int_constant
:
942 printf("%d ", primary_expression
.int_constant
);
945 case ast_uint_constant
:
946 printf("%u ", primary_expression
.uint_constant
);
949 case ast_float_constant
:
950 printf("%f ", primary_expression
.float_constant
);
953 case ast_bool_constant
:
955 primary_expression
.bool_constant
961 foreach_list_const(n
, & this->expressions
) {
962 if (n
!= this->expressions
.get_head())
965 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
972 case ast_aggregate
: {
974 foreach_list_const(n
, & this->expressions
) {
975 if (n
!= this->expressions
.get_head())
978 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
991 ast_expression::ast_expression(int oper
,
994 ast_expression
*ex2
) :
997 this->oper
= ast_operators(oper
);
998 this->subexpressions
[0] = ex0
;
999 this->subexpressions
[1] = ex1
;
1000 this->subexpressions
[2] = ex2
;
1001 this->non_lvalue_description
= NULL
;
1006 ast_expression_statement::print(void) const
1009 expression
->print();
1015 ast_expression_statement::ast_expression_statement(ast_expression
*ex
) :
1023 ast_function::print(void) const
1025 return_type
->print();
1026 printf(" %s (", identifier
);
1028 foreach_list_const(n
, & this->parameters
) {
1029 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1037 ast_function::ast_function(void)
1038 : return_type(NULL
), identifier(NULL
), is_definition(false),
1046 ast_fully_specified_type::print(void) const
1048 _mesa_ast_type_qualifier_print(& qualifier
);
1054 ast_parameter_declarator::print(void) const
1058 printf("%s ", identifier
);
1059 ast_opt_array_dimensions_print(array_specifier
);
1064 ast_function_definition::print(void) const
1072 ast_declaration::print(void) const
1074 printf("%s ", identifier
);
1075 ast_opt_array_dimensions_print(array_specifier
);
1079 initializer
->print();
1084 ast_declaration::ast_declaration(const char *identifier
,
1085 ast_array_specifier
*array_specifier
,
1086 ast_expression
*initializer
)
1088 this->identifier
= identifier
;
1089 this->array_specifier
= array_specifier
;
1090 this->initializer
= initializer
;
1095 ast_declarator_list::print(void) const
1097 assert(type
|| invariant
);
1102 printf("invariant ");
1104 foreach_list_const (ptr
, & this->declarations
) {
1105 if (ptr
!= this->declarations
.get_head())
1108 ast_node
*ast
= exec_node_data(ast_node
, ptr
, link
);
1116 ast_declarator_list::ast_declarator_list(ast_fully_specified_type
*type
)
1119 this->invariant
= false;
1123 ast_jump_statement::print(void) const
1127 printf("continue; ");
1134 if (opt_return_value
)
1135 opt_return_value
->print();
1140 printf("discard; ");
1146 ast_jump_statement::ast_jump_statement(int mode
, ast_expression
*return_value
)
1147 : opt_return_value(NULL
)
1149 this->mode
= ast_jump_modes(mode
);
1151 if (mode
== ast_return
)
1152 opt_return_value
= return_value
;
1157 ast_selection_statement::print(void) const
1163 then_statement
->print();
1165 if (else_statement
) {
1167 else_statement
->print();
1173 ast_selection_statement::ast_selection_statement(ast_expression
*condition
,
1174 ast_node
*then_statement
,
1175 ast_node
*else_statement
)
1177 this->condition
= condition
;
1178 this->then_statement
= then_statement
;
1179 this->else_statement
= else_statement
;
1184 ast_switch_statement::print(void) const
1186 printf("switch ( ");
1187 test_expression
->print();
1194 ast_switch_statement::ast_switch_statement(ast_expression
*test_expression
,
1197 this->test_expression
= test_expression
;
1203 ast_switch_body::print(void) const
1206 if (stmts
!= NULL
) {
1213 ast_switch_body::ast_switch_body(ast_case_statement_list
*stmts
)
1215 this->stmts
= stmts
;
1219 void ast_case_label::print(void) const
1221 if (test_value
!= NULL
) {
1223 test_value
->print();
1226 printf("default: ");
1231 ast_case_label::ast_case_label(ast_expression
*test_value
)
1233 this->test_value
= test_value
;
1237 void ast_case_label_list::print(void) const
1239 foreach_list_const(n
, & this->labels
) {
1240 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1247 ast_case_label_list::ast_case_label_list(void)
1252 void ast_case_statement::print(void) const
1255 foreach_list_const(n
, & this->stmts
) {
1256 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1263 ast_case_statement::ast_case_statement(ast_case_label_list
*labels
)
1265 this->labels
= labels
;
1269 void ast_case_statement_list::print(void) const
1271 foreach_list_const(n
, & this->cases
) {
1272 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1278 ast_case_statement_list::ast_case_statement_list(void)
1284 ast_iteration_statement::print(void) const
1290 init_statement
->print();
1297 if (rest_expression
)
1298 rest_expression
->print();
1324 ast_iteration_statement::ast_iteration_statement(int mode
,
1326 ast_node
*condition
,
1327 ast_expression
*rest_expression
,
1330 this->mode
= ast_iteration_modes(mode
);
1331 this->init_statement
= init
;
1332 this->condition
= condition
;
1333 this->rest_expression
= rest_expression
;
1339 ast_struct_specifier::print(void) const
1341 printf("struct %s { ", name
);
1342 foreach_list_const(n
, &this->declarations
) {
1343 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1350 ast_struct_specifier::ast_struct_specifier(const char *identifier
,
1351 ast_declarator_list
*declarator_list
)
1353 if (identifier
== NULL
) {
1354 static unsigned anon_count
= 1;
1355 identifier
= ralloc_asprintf(this, "#anon_struct_%04x", anon_count
);
1359 this->declarations
.push_degenerate_list_at_head(&declarator_list
->link
);
1360 is_declaration
= true;
1364 set_shader_inout_layout(struct gl_shader
*shader
,
1365 struct _mesa_glsl_parse_state
*state
)
1367 if (shader
->Stage
!= MESA_SHADER_GEOMETRY
) {
1368 /* Should have been prevented by the parser. */
1369 assert(!state
->in_qualifier
->flags
.i
);
1370 assert(!state
->out_qualifier
->flags
.i
);
1373 if (shader
->Stage
!= MESA_SHADER_COMPUTE
) {
1374 /* Should have been prevented by the parser. */
1375 assert(!state
->cs_input_local_size_specified
);
1378 if (shader
->Stage
!= MESA_SHADER_FRAGMENT
) {
1379 /* Should have been prevented by the parser. */
1380 assert(!state
->fs_uses_gl_fragcoord
);
1381 assert(!state
->fs_redeclares_gl_fragcoord
);
1382 assert(!state
->fs_pixel_center_integer
);
1383 assert(!state
->fs_origin_upper_left
);
1386 switch (shader
->Stage
) {
1387 case MESA_SHADER_GEOMETRY
:
1388 shader
->Geom
.VerticesOut
= 0;
1389 if (state
->out_qualifier
->flags
.q
.max_vertices
)
1390 shader
->Geom
.VerticesOut
= state
->out_qualifier
->max_vertices
;
1392 if (state
->gs_input_prim_type_specified
) {
1393 shader
->Geom
.InputType
= state
->in_qualifier
->prim_type
;
1395 shader
->Geom
.InputType
= PRIM_UNKNOWN
;
1398 if (state
->out_qualifier
->flags
.q
.prim_type
) {
1399 shader
->Geom
.OutputType
= state
->out_qualifier
->prim_type
;
1401 shader
->Geom
.OutputType
= PRIM_UNKNOWN
;
1404 shader
->Geom
.Invocations
= 0;
1405 if (state
->in_qualifier
->flags
.q
.invocations
)
1406 shader
->Geom
.Invocations
= state
->in_qualifier
->invocations
;
1409 case MESA_SHADER_COMPUTE
:
1410 if (state
->cs_input_local_size_specified
) {
1411 for (int i
= 0; i
< 3; i
++)
1412 shader
->Comp
.LocalSize
[i
] = state
->cs_input_local_size
[i
];
1414 for (int i
= 0; i
< 3; i
++)
1415 shader
->Comp
.LocalSize
[i
] = 0;
1419 case MESA_SHADER_FRAGMENT
:
1420 shader
->redeclares_gl_fragcoord
= state
->fs_redeclares_gl_fragcoord
;
1421 shader
->uses_gl_fragcoord
= state
->fs_uses_gl_fragcoord
;
1422 shader
->pixel_center_integer
= state
->fs_pixel_center_integer
;
1423 shader
->origin_upper_left
= state
->fs_origin_upper_left
;
1424 shader
->ARB_fragment_coord_conventions_enable
=
1425 state
->ARB_fragment_coord_conventions_enable
;
1429 /* Nothing to do. */
1437 _mesa_glsl_compile_shader(struct gl_context
*ctx
, struct gl_shader
*shader
,
1438 bool dump_ast
, bool dump_hir
)
1440 struct _mesa_glsl_parse_state
*state
=
1441 new(shader
) _mesa_glsl_parse_state(ctx
, shader
->Stage
, shader
);
1442 const char *source
= shader
->Source
;
1444 state
->error
= glcpp_preprocess(state
, &source
, &state
->info_log
,
1445 &ctx
->Extensions
, ctx
);
1447 if (!state
->error
) {
1448 _mesa_glsl_lexer_ctor(state
, source
);
1449 _mesa_glsl_parse(state
);
1450 _mesa_glsl_lexer_dtor(state
);
1454 foreach_list_const(n
, &state
->translation_unit
) {
1455 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1461 ralloc_free(shader
->ir
);
1462 shader
->ir
= new(shader
) exec_list
;
1463 if (!state
->error
&& !state
->translation_unit
.is_empty())
1464 _mesa_ast_to_hir(shader
->ir
, state
);
1466 if (!state
->error
) {
1467 validate_ir_tree(shader
->ir
);
1469 /* Print out the unoptimized IR. */
1471 _mesa_print_ir(stdout
, shader
->ir
, state
);
1476 if (!state
->error
&& !shader
->ir
->is_empty()) {
1477 struct gl_shader_compiler_options
*options
=
1478 &ctx
->ShaderCompilerOptions
[shader
->Stage
];
1480 /* Do some optimization at compile time to reduce shader IR size
1481 * and reduce later work if the same shader is linked multiple times
1483 while (do_common_optimization(shader
->ir
, false, false, options
,
1484 ctx
->Const
.NativeIntegers
))
1487 validate_ir_tree(shader
->ir
);
1490 if (shader
->InfoLog
)
1491 ralloc_free(shader
->InfoLog
);
1493 shader
->symbols
= state
->symbols
;
1494 shader
->CompileStatus
= !state
->error
;
1495 shader
->InfoLog
= state
->info_log
;
1496 shader
->Version
= state
->language_version
;
1497 shader
->IsES
= state
->es_shader
;
1498 shader
->uses_builtin_functions
= state
->uses_builtin_functions
;
1501 set_shader_inout_layout(shader
, state
);
1503 /* Retain any live IR, but trash the rest. */
1504 reparent_ir(shader
->ir
, shader
->ir
);
1511 * Do the set of common optimizations passes
1513 * \param ir List of instructions to be optimized
1514 * \param linked Is the shader linked? This enables
1515 * optimizations passes that remove code at
1516 * global scope and could cause linking to
1518 * \param uniform_locations_assigned Have locations already been assigned for
1519 * uniforms? This prevents the declarations
1520 * of unused uniforms from being removed.
1521 * The setting of this flag only matters if
1522 * \c linked is \c true.
1523 * \param max_unroll_iterations Maximum number of loop iterations to be
1524 * unrolled. Setting to 0 disables loop
1526 * \param options The driver's preferred shader options.
1529 do_common_optimization(exec_list
*ir
, bool linked
,
1530 bool uniform_locations_assigned
,
1531 const struct gl_shader_compiler_options
*options
,
1532 bool native_integers
)
1534 GLboolean progress
= GL_FALSE
;
1536 progress
= lower_instructions(ir
, SUB_TO_ADD_NEG
) || progress
;
1539 progress
= do_function_inlining(ir
) || progress
;
1540 progress
= do_dead_functions(ir
) || progress
;
1541 progress
= do_structure_splitting(ir
) || progress
;
1543 progress
= do_if_simplification(ir
) || progress
;
1544 progress
= opt_flatten_nested_if_blocks(ir
) || progress
;
1545 progress
= do_copy_propagation(ir
) || progress
;
1546 progress
= do_copy_propagation_elements(ir
) || progress
;
1548 if (options
->OptimizeForAOS
&& !linked
)
1549 progress
= opt_flip_matrices(ir
) || progress
;
1551 if (linked
&& options
->OptimizeForAOS
) {
1552 progress
= do_vectorize(ir
) || progress
;
1556 progress
= do_dead_code(ir
, uniform_locations_assigned
) || progress
;
1558 progress
= do_dead_code_unlinked(ir
) || progress
;
1559 progress
= do_dead_code_local(ir
) || progress
;
1560 progress
= do_tree_grafting(ir
) || progress
;
1561 progress
= do_constant_propagation(ir
) || progress
;
1563 progress
= do_constant_variable(ir
) || progress
;
1565 progress
= do_constant_variable_unlinked(ir
) || progress
;
1566 progress
= do_constant_folding(ir
) || progress
;
1567 progress
= do_cse(ir
) || progress
;
1568 progress
= do_algebraic(ir
, native_integers
) || progress
;
1569 progress
= do_lower_jumps(ir
) || progress
;
1570 progress
= do_vec_index_to_swizzle(ir
) || progress
;
1571 progress
= lower_vector_insert(ir
, false) || progress
;
1572 progress
= do_swizzle_swizzle(ir
) || progress
;
1573 progress
= do_noop_swizzle(ir
) || progress
;
1575 progress
= optimize_split_arrays(ir
, linked
) || progress
;
1576 progress
= optimize_redundant_jumps(ir
) || progress
;
1578 loop_state
*ls
= analyze_loop_variables(ir
);
1579 if (ls
->loop_found
) {
1580 progress
= set_loop_controls(ir
, ls
) || progress
;
1581 progress
= unroll_loops(ir
, ls
, options
) || progress
;
1591 * To be called at GL teardown time, this frees compiler datastructures.
1593 * After calling this, any previously compiled shaders and shader
1594 * programs would be invalid. So this should happen at approximately
1598 _mesa_destroy_shader_compiler(void)
1600 _mesa_destroy_shader_compiler_caches();
1602 _mesa_glsl_release_types();
1606 * Releases compiler caches to trade off performance for memory.
1608 * Intended to be used with glReleaseShaderCompiler().
1611 _mesa_destroy_shader_compiler_caches(void)
1613 _mesa_glsl_release_builtin_functions();