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 unsigned known_desktop_glsl_versions
[] =
53 { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430 };
56 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context
*_ctx
,
57 gl_shader_stage stage
,
59 : ctx(_ctx
), switch_state()
61 assert(stage
< MESA_SHADER_STAGES
);
65 this->translation_unit
.make_empty();
66 this->symbols
= new(mem_ctx
) glsl_symbol_table
;
68 this->num_uniform_blocks
= 0;
69 this->uniform_block_array_size
= 0;
70 this->uniform_blocks
= NULL
;
72 this->info_log
= ralloc_strdup(mem_ctx
, "");
74 this->loop_nesting_ast
= NULL
;
76 this->struct_specifier_depth
= 0;
78 this->uses_builtin_functions
= false;
80 /* Set default language version and extensions */
81 this->language_version
= ctx
->Const
.ForceGLSLVersion
?
82 ctx
->Const
.ForceGLSLVersion
: 110;
83 this->es_shader
= false;
84 this->ARB_texture_rectangle_enable
= true;
86 /* OpenGL ES 2.0 has different defaults from desktop GL. */
87 if (ctx
->API
== API_OPENGLES2
) {
88 this->language_version
= 100;
89 this->es_shader
= true;
90 this->ARB_texture_rectangle_enable
= false;
93 this->extensions
= &ctx
->Extensions
;
95 this->Const
.MaxLights
= ctx
->Const
.MaxLights
;
96 this->Const
.MaxClipPlanes
= ctx
->Const
.MaxClipPlanes
;
97 this->Const
.MaxTextureUnits
= ctx
->Const
.MaxTextureUnits
;
98 this->Const
.MaxTextureCoords
= ctx
->Const
.MaxTextureCoordUnits
;
99 this->Const
.MaxVertexAttribs
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAttribs
;
100 this->Const
.MaxVertexUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxUniformComponents
;
101 this->Const
.MaxVertexTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxTextureImageUnits
;
102 this->Const
.MaxCombinedTextureImageUnits
= ctx
->Const
.MaxCombinedTextureImageUnits
;
103 this->Const
.MaxTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxTextureImageUnits
;
104 this->Const
.MaxFragmentUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxUniformComponents
;
105 this->Const
.MinProgramTexelOffset
= ctx
->Const
.MinProgramTexelOffset
;
106 this->Const
.MaxProgramTexelOffset
= ctx
->Const
.MaxProgramTexelOffset
;
108 this->Const
.MaxDrawBuffers
= ctx
->Const
.MaxDrawBuffers
;
111 this->Const
.MaxVertexOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxOutputComponents
;
112 this->Const
.MaxGeometryInputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxInputComponents
;
113 this->Const
.MaxGeometryOutputComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxOutputComponents
;
114 this->Const
.MaxFragmentInputComponents
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxInputComponents
;
115 this->Const
.MaxGeometryTextureImageUnits
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxTextureImageUnits
;
116 this->Const
.MaxGeometryOutputVertices
= ctx
->Const
.MaxGeometryOutputVertices
;
117 this->Const
.MaxGeometryTotalOutputComponents
= ctx
->Const
.MaxGeometryTotalOutputComponents
;
118 this->Const
.MaxGeometryUniformComponents
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxUniformComponents
;
120 this->Const
.MaxVertexAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_VERTEX
].MaxAtomicCounters
;
121 this->Const
.MaxGeometryAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_GEOMETRY
].MaxAtomicCounters
;
122 this->Const
.MaxFragmentAtomicCounters
= ctx
->Const
.Program
[MESA_SHADER_FRAGMENT
].MaxAtomicCounters
;
123 this->Const
.MaxCombinedAtomicCounters
= ctx
->Const
.MaxCombinedAtomicCounters
;
124 this->Const
.MaxAtomicBufferBindings
= ctx
->Const
.MaxAtomicBufferBindings
;
126 this->current_function
= NULL
;
127 this->toplevel_ir
= NULL
;
128 this->found_return
= false;
129 this->all_invariant
= false;
130 this->user_structures
= NULL
;
131 this->num_user_structures
= 0;
133 /* Populate the list of supported GLSL versions */
134 /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
135 * the OpenGL 3.2 Core context is supported, this logic will need
136 * change. Older versions of GLSL are no longer supported
137 * outside the compatibility contexts of 3.x.
139 this->num_supported_versions
= 0;
140 if (_mesa_is_desktop_gl(ctx
)) {
141 for (unsigned i
= 0; i
< ARRAY_SIZE(known_desktop_glsl_versions
); i
++) {
142 if (known_desktop_glsl_versions
[i
] <= ctx
->Const
.GLSLVersion
) {
143 this->supported_versions
[this->num_supported_versions
].ver
144 = known_desktop_glsl_versions
[i
];
145 this->supported_versions
[this->num_supported_versions
].es
= false;
146 this->num_supported_versions
++;
150 if (ctx
->API
== API_OPENGLES2
|| ctx
->Extensions
.ARB_ES2_compatibility
) {
151 this->supported_versions
[this->num_supported_versions
].ver
= 100;
152 this->supported_versions
[this->num_supported_versions
].es
= true;
153 this->num_supported_versions
++;
155 if (_mesa_is_gles3(ctx
) || ctx
->Extensions
.ARB_ES3_compatibility
) {
156 this->supported_versions
[this->num_supported_versions
].ver
= 300;
157 this->supported_versions
[this->num_supported_versions
].es
= true;
158 this->num_supported_versions
++;
160 assert(this->num_supported_versions
161 <= ARRAY_SIZE(this->supported_versions
));
163 /* Create a string for use in error messages to tell the user which GLSL
164 * versions are supported.
166 char *supported
= ralloc_strdup(this, "");
167 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
168 unsigned ver
= this->supported_versions
[i
].ver
;
169 const char *const prefix
= (i
== 0)
171 : ((i
== this->num_supported_versions
- 1) ? ", and " : ", ");
172 const char *const suffix
= (this->supported_versions
[i
].es
) ? " ES" : "";
174 ralloc_asprintf_append(& supported
, "%s%u.%02u%s",
176 ver
/ 100, ver
% 100,
180 this->supported_version_string
= supported
;
182 if (ctx
->Const
.ForceGLSLExtensionsWarn
)
183 _mesa_glsl_process_extension("all", NULL
, "warn", NULL
, this);
185 this->default_uniform_qualifier
= new(this) ast_type_qualifier();
186 this->default_uniform_qualifier
->flags
.q
.shared
= 1;
187 this->default_uniform_qualifier
->flags
.q
.column_major
= 1;
189 this->gs_input_prim_type_specified
= false;
190 this->gs_input_prim_type
= GL_POINTS
;
191 this->gs_input_size
= 0;
192 this->out_qualifier
= new(this) ast_type_qualifier();
193 memset(this->atomic_counter_offsets
, 0,
194 sizeof(this->atomic_counter_offsets
));
198 * Determine whether the current GLSL version is sufficiently high to support
199 * a certain feature, and generate an error message if it isn't.
201 * \param required_glsl_version and \c required_glsl_es_version are
202 * interpreted as they are in _mesa_glsl_parse_state::is_version().
204 * \param locp is the parser location where the error should be reported.
206 * \param fmt (and additional arguments) constitute a printf-style error
207 * message to report if the version check fails. Information about the
208 * current and required GLSL versions will be appended. So, for example, if
209 * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
210 * "foo unsupported") is called, the error message will be "foo unsupported in
211 * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
214 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version
,
215 unsigned required_glsl_es_version
,
216 YYLTYPE
*locp
, const char *fmt
, ...)
218 if (this->is_version(required_glsl_version
, required_glsl_es_version
))
223 char *problem
= ralloc_vasprintf(this, fmt
, args
);
225 const char *glsl_version_string
226 = glsl_compute_version_string(this, false, required_glsl_version
);
227 const char *glsl_es_version_string
228 = glsl_compute_version_string(this, true, required_glsl_es_version
);
229 const char *requirement_string
= "";
230 if (required_glsl_version
&& required_glsl_es_version
) {
231 requirement_string
= ralloc_asprintf(this, " (%s or %s required)",
233 glsl_es_version_string
);
234 } else if (required_glsl_version
) {
235 requirement_string
= ralloc_asprintf(this, " (%s required)",
236 glsl_version_string
);
237 } else if (required_glsl_es_version
) {
238 requirement_string
= ralloc_asprintf(this, " (%s required)",
239 glsl_es_version_string
);
241 _mesa_glsl_error(locp
, this, "%s in %s%s",
242 problem
, this->get_version_string(),
249 * Process a GLSL #version directive.
251 * \param version is the integer that follows the #version token.
253 * \param ident is a string identifier that follows the integer, if any is
254 * present. Otherwise NULL.
257 _mesa_glsl_parse_state::process_version_directive(YYLTYPE
*locp
, int version
,
260 bool es_token_present
= false;
262 if (strcmp(ident
, "es") == 0) {
263 es_token_present
= true;
264 } else if (version
>= 150) {
265 if (strcmp(ident
, "core") == 0) {
266 /* Accept the token. There's no need to record that this is
267 * a core profile shader since that's the only profile we support.
269 } else if (strcmp(ident
, "compatibility") == 0) {
270 _mesa_glsl_error(locp
, this,
271 "the compatibility profile is not supported");
273 _mesa_glsl_error(locp
, this,
274 "\"%s\" is not a valid shading language profile; "
275 "if present, it must be \"core\"", ident
);
278 _mesa_glsl_error(locp
, this,
279 "illegal text following version number");
283 this->es_shader
= es_token_present
;
284 if (version
== 100) {
285 if (es_token_present
) {
286 _mesa_glsl_error(locp
, this,
287 "GLSL 1.00 ES should be selected using "
290 this->es_shader
= true;
294 this->language_version
= version
;
296 bool supported
= false;
297 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
298 if (this->supported_versions
[i
].ver
== (unsigned) version
299 && this->supported_versions
[i
].es
== this->es_shader
) {
306 _mesa_glsl_error(locp
, this, "%s is not supported. "
307 "Supported versions are: %s",
308 this->get_version_string(),
309 this->supported_version_string
);
311 /* On exit, the language_version must be set to a valid value.
312 * Later calls to _mesa_glsl_initialize_types will misbehave if
313 * the version is invalid.
315 switch (this->ctx
->API
) {
316 case API_OPENGL_COMPAT
:
317 case API_OPENGL_CORE
:
318 this->language_version
= this->ctx
->Const
.GLSLVersion
;
322 assert(!"Should not get here.");
326 this->language_version
= 100;
334 * Translate a gl_shader_stage to a short shader stage name for debug
335 * printouts and error messages.
338 _mesa_shader_stage_to_string(unsigned stage
)
341 case MESA_SHADER_VERTEX
: return "vertex";
342 case MESA_SHADER_FRAGMENT
: return "fragment";
343 case MESA_SHADER_GEOMETRY
: return "geometry";
346 assert(!"Should not get here.");
350 /* This helper function will append the given message to the shader's
351 info log and report it via GL_ARB_debug_output. Per that extension,
352 'type' is one of the enum values classifying the message, and
353 'id' is the implementation-defined ID of the given message. */
355 _mesa_glsl_msg(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
356 GLenum type
, const char *fmt
, va_list ap
)
358 bool error
= (type
== MESA_DEBUG_TYPE_ERROR
);
361 assert(state
->info_log
!= NULL
);
363 /* Get the offset that the new message will be written to. */
364 int msg_offset
= strlen(state
->info_log
);
366 ralloc_asprintf_append(&state
->info_log
, "%u:%u(%u): %s: ",
370 error
? "error" : "warning");
371 ralloc_vasprintf_append(&state
->info_log
, fmt
, ap
);
373 const char *const msg
= &state
->info_log
[msg_offset
];
374 struct gl_context
*ctx
= state
->ctx
;
376 /* Report the error via GL_ARB_debug_output. */
377 _mesa_shader_debug(ctx
, type
, &msg_id
, msg
, strlen(msg
));
379 ralloc_strcat(&state
->info_log
, "\n");
383 _mesa_glsl_error(YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
384 const char *fmt
, ...)
391 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_ERROR
, fmt
, ap
);
397 _mesa_glsl_warning(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
398 const char *fmt
, ...)
403 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_OTHER
, fmt
, ap
);
409 * Enum representing the possible behaviors that can be specified in
410 * an #extension directive.
420 * Element type for _mesa_glsl_supported_extensions
422 struct _mesa_glsl_extension
{
424 * Name of the extension when referred to in a GLSL extension
429 /** True if this extension is available to desktop GL shaders */
432 /** True if this extension is available to GLES shaders */
436 * Flag in the gl_extensions struct indicating whether this
437 * extension is supported by the driver, or
438 * &gl_extensions::dummy_true if supported by all drivers.
440 * Note: the type (GLboolean gl_extensions::*) is a "pointer to
441 * member" type, the type-safe alternative to the "offsetof" macro.
444 * - foo bar::* p declares p to be an "offset" to a field of type
445 * foo that exists within struct bar
446 * - &bar::baz computes the "offset" of field baz within struct bar
447 * - x.*p accesses the field of x that exists at "offset" p
448 * - x->*p is equivalent to (*x).*p
450 const GLboolean
gl_extensions::* supported_flag
;
453 * Flag in the _mesa_glsl_parse_state struct that should be set
454 * when this extension is enabled.
456 * See note in _mesa_glsl_extension::supported_flag about "pointer
459 bool _mesa_glsl_parse_state::* enable_flag
;
462 * Flag in the _mesa_glsl_parse_state struct that should be set
463 * when the shader requests "warn" behavior for this extension.
465 * See note in _mesa_glsl_extension::supported_flag about "pointer
468 bool _mesa_glsl_parse_state::* warn_flag
;
471 bool compatible_with_state(const _mesa_glsl_parse_state
*state
) const;
472 void set_flags(_mesa_glsl_parse_state
*state
, ext_behavior behavior
) const;
475 #define EXT(NAME, GL, ES, SUPPORTED_FLAG) \
476 { "GL_" #NAME, GL, ES, &gl_extensions::SUPPORTED_FLAG, \
477 &_mesa_glsl_parse_state::NAME##_enable, \
478 &_mesa_glsl_parse_state::NAME##_warn }
481 * Table of extensions that can be enabled/disabled within a shader,
482 * and the conditions under which they are supported.
484 static const _mesa_glsl_extension _mesa_glsl_supported_extensions
[] = {
485 /* API availability */
486 /* name GL ES supported flag */
487 EXT(ARB_arrays_of_arrays
, true, false, ARB_arrays_of_arrays
),
488 EXT(ARB_conservative_depth
, true, false, ARB_conservative_depth
),
489 EXT(ARB_draw_buffers
, true, false, dummy_true
),
490 EXT(ARB_draw_instanced
, true, false, ARB_draw_instanced
),
491 EXT(ARB_explicit_attrib_location
, true, false, ARB_explicit_attrib_location
),
492 EXT(ARB_fragment_coord_conventions
, true, false, ARB_fragment_coord_conventions
),
493 EXT(ARB_texture_rectangle
, true, false, dummy_true
),
494 EXT(EXT_texture_array
, true, false, EXT_texture_array
),
495 EXT(ARB_shader_texture_lod
, true, false, ARB_shader_texture_lod
),
496 EXT(ARB_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
497 EXT(AMD_conservative_depth
, true, false, ARB_conservative_depth
),
498 EXT(AMD_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
499 EXT(OES_texture_3D
, false, true, EXT_texture3D
),
500 EXT(OES_EGL_image_external
, false, true, OES_EGL_image_external
),
501 EXT(ARB_shader_bit_encoding
, true, false, ARB_shader_bit_encoding
),
502 EXT(ARB_uniform_buffer_object
, true, false, ARB_uniform_buffer_object
),
503 EXT(OES_standard_derivatives
, false, true, OES_standard_derivatives
),
504 EXT(ARB_texture_cube_map_array
, true, false, ARB_texture_cube_map_array
),
505 EXT(ARB_shading_language_packing
, true, false, ARB_shading_language_packing
),
506 EXT(ARB_shading_language_420pack
, true, false, ARB_shading_language_420pack
),
507 EXT(ARB_texture_multisample
, true, false, ARB_texture_multisample
),
508 EXT(ARB_texture_query_levels
, true, false, ARB_texture_query_levels
),
509 EXT(ARB_texture_query_lod
, true, false, ARB_texture_query_lod
),
510 EXT(ARB_gpu_shader5
, true, false, ARB_gpu_shader5
),
511 EXT(AMD_vertex_shader_layer
, true, false, AMD_vertex_shader_layer
),
512 EXT(EXT_shader_integer_mix
, true, true, EXT_shader_integer_mix
),
513 EXT(ARB_texture_gather
, true, false, ARB_texture_gather
),
514 EXT(ARB_shader_atomic_counters
, true, false, ARB_shader_atomic_counters
),
515 EXT(ARB_sample_shading
, true, false, ARB_sample_shading
),
516 EXT(AMD_shader_trinary_minmax
, true, false, dummy_true
),
517 EXT(ARB_viewport_array
, true, false, ARB_viewport_array
),
524 * Determine whether a given extension is compatible with the target,
525 * API, and extension information in the current parser state.
527 bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state
*
530 /* Check that this extension matches whether we are compiling
531 * for desktop GL or GLES.
533 if (state
->es_shader
) {
534 if (!this->avail_in_ES
) return false;
536 if (!this->avail_in_GL
) return false;
539 /* Check that this extension is supported by the OpenGL
542 * Note: the ->* operator indexes into state->extensions by the
543 * offset this->supported_flag. See
544 * _mesa_glsl_extension::supported_flag for more info.
546 return state
->extensions
->*(this->supported_flag
);
550 * Set the appropriate flags in the parser state to establish the
551 * given behavior for this extension.
553 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state
*state
,
554 ext_behavior behavior
) const
556 /* Note: the ->* operator indexes into state by the
557 * offsets this->enable_flag and this->warn_flag. See
558 * _mesa_glsl_extension::supported_flag for more info.
560 state
->*(this->enable_flag
) = (behavior
!= extension_disable
);
561 state
->*(this->warn_flag
) = (behavior
== extension_warn
);
565 * Find an extension by name in _mesa_glsl_supported_extensions. If
566 * the name is not found, return NULL.
568 static const _mesa_glsl_extension
*find_extension(const char *name
)
570 for (unsigned i
= 0; i
< Elements(_mesa_glsl_supported_extensions
); ++i
) {
571 if (strcmp(name
, _mesa_glsl_supported_extensions
[i
].name
) == 0) {
572 return &_mesa_glsl_supported_extensions
[i
];
580 _mesa_glsl_process_extension(const char *name
, YYLTYPE
*name_locp
,
581 const char *behavior_string
, YYLTYPE
*behavior_locp
,
582 _mesa_glsl_parse_state
*state
)
584 ext_behavior behavior
;
585 if (strcmp(behavior_string
, "warn") == 0) {
586 behavior
= extension_warn
;
587 } else if (strcmp(behavior_string
, "require") == 0) {
588 behavior
= extension_require
;
589 } else if (strcmp(behavior_string
, "enable") == 0) {
590 behavior
= extension_enable
;
591 } else if (strcmp(behavior_string
, "disable") == 0) {
592 behavior
= extension_disable
;
594 _mesa_glsl_error(behavior_locp
, state
,
595 "unknown extension behavior `%s'",
600 if (strcmp(name
, "all") == 0) {
601 if ((behavior
== extension_enable
) || (behavior
== extension_require
)) {
602 _mesa_glsl_error(name_locp
, state
, "cannot %s all extensions",
603 (behavior
== extension_enable
)
604 ? "enable" : "require");
608 i
< Elements(_mesa_glsl_supported_extensions
); ++i
) {
609 const _mesa_glsl_extension
*extension
610 = &_mesa_glsl_supported_extensions
[i
];
611 if (extension
->compatible_with_state(state
)) {
612 _mesa_glsl_supported_extensions
[i
].set_flags(state
, behavior
);
617 const _mesa_glsl_extension
*extension
= find_extension(name
);
618 if (extension
&& extension
->compatible_with_state(state
)) {
619 extension
->set_flags(state
, behavior
);
621 static const char *const fmt
= "extension `%s' unsupported in %s shader";
623 if (behavior
== extension_require
) {
624 _mesa_glsl_error(name_locp
, state
, fmt
,
625 name
, _mesa_shader_stage_to_string(state
->stage
));
628 _mesa_glsl_warning(name_locp
, state
, fmt
,
629 name
, _mesa_shader_stage_to_string(state
->stage
));
639 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
640 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
641 * (process_array_constructor, et al) sufficient information to do type
644 * Operates on assignments involving an aggregate initializer. E.g.,
646 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
648 * or more ridiculously,
661 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
662 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
667 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
668 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
674 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
675 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
681 * This pass is necessary because the right-hand side of <type> e = { ... }
682 * doesn't contain sufficient information to determine if the types match.
685 _mesa_ast_set_aggregate_type(const glsl_type
*type
,
686 ast_expression
*expr
)
688 ast_aggregate_initializer
*ai
= (ast_aggregate_initializer
*)expr
;
689 ai
->constructor_type
= type
;
691 /* If the aggregate is an array, recursively set its elements' types. */
692 if (type
->is_array()) {
693 /* Each array element has the type type->element_type().
695 * E.g., if <type> if struct S[2] we want to set each element's type to
698 for (exec_node
*expr_node
= ai
->expressions
.head
;
699 !expr_node
->is_tail_sentinel();
700 expr_node
= expr_node
->next
) {
701 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
704 if (expr
->oper
== ast_aggregate
)
705 _mesa_ast_set_aggregate_type(type
->element_type(), expr
);
708 /* If the aggregate is a struct, recursively set its fields' types. */
709 } else if (type
->is_record()) {
710 exec_node
*expr_node
= ai
->expressions
.head
;
712 /* Iterate through the struct's fields. */
713 for (unsigned i
= 0; !expr_node
->is_tail_sentinel() && i
< type
->length
;
714 i
++, expr_node
= expr_node
->next
) {
715 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
718 if (expr
->oper
== ast_aggregate
) {
719 _mesa_ast_set_aggregate_type(type
->fields
.structure
[i
].type
, expr
);
722 /* If the aggregate is a matrix, set its columns' types. */
723 } else if (type
->is_matrix()) {
724 for (exec_node
*expr_node
= ai
->expressions
.head
;
725 !expr_node
->is_tail_sentinel();
726 expr_node
= expr_node
->next
) {
727 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
730 if (expr
->oper
== ast_aggregate
)
731 _mesa_ast_set_aggregate_type(type
->column_type(), expr
);
738 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier
*q
)
740 if (q
->flags
.q
.constant
)
743 if (q
->flags
.q
.invariant
)
744 printf("invariant ");
746 if (q
->flags
.q
.attribute
)
747 printf("attribute ");
749 if (q
->flags
.q
.varying
)
752 if (q
->flags
.q
.in
&& q
->flags
.q
.out
)
762 if (q
->flags
.q
.centroid
)
764 if (q
->flags
.q
.sample
)
766 if (q
->flags
.q
.uniform
)
768 if (q
->flags
.q
.smooth
)
772 if (q
->flags
.q
.noperspective
)
773 printf("noperspective ");
778 ast_node::print(void) const
780 printf("unhandled node ");
784 ast_node::ast_node(void)
786 this->location
.source
= 0;
787 this->location
.line
= 0;
788 this->location
.column
= 0;
793 ast_opt_array_dimensions_print(bool is_array
, const ast_array_specifier
*array_specifier
)
797 array_specifier
->print();
803 ast_compound_statement::print(void) const
807 foreach_list_const(n
, &this->statements
) {
808 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
816 ast_compound_statement::ast_compound_statement(int new_scope
,
817 ast_node
*statements
)
819 this->new_scope
= new_scope
;
821 if (statements
!= NULL
) {
822 this->statements
.push_degenerate_list_at_head(&statements
->link
);
828 ast_expression::print(void) const
842 subexpressions
[0]->print();
843 printf("%s ", operator_string(oper
));
844 subexpressions
[1]->print();
847 case ast_field_selection
:
848 subexpressions
[0]->print();
849 printf(". %s ", primary_expression
.identifier
);
858 printf("%s ", operator_string(oper
));
859 subexpressions
[0]->print();
864 subexpressions
[0]->print();
865 printf("%s ", operator_string(oper
));
868 case ast_conditional
:
869 subexpressions
[0]->print();
871 subexpressions
[1]->print();
873 subexpressions
[2]->print();
876 case ast_array_index
:
877 subexpressions
[0]->print();
879 subexpressions
[1]->print();
883 case ast_function_call
: {
884 subexpressions
[0]->print();
887 foreach_list_const (n
, &this->expressions
) {
888 if (n
!= this->expressions
.get_head())
891 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
900 printf("%s ", primary_expression
.identifier
);
903 case ast_int_constant
:
904 printf("%d ", primary_expression
.int_constant
);
907 case ast_uint_constant
:
908 printf("%u ", primary_expression
.uint_constant
);
911 case ast_float_constant
:
912 printf("%f ", primary_expression
.float_constant
);
915 case ast_bool_constant
:
917 primary_expression
.bool_constant
923 foreach_list_const(n
, & this->expressions
) {
924 if (n
!= this->expressions
.get_head())
927 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
934 case ast_aggregate
: {
936 foreach_list_const(n
, & this->expressions
) {
937 if (n
!= this->expressions
.get_head())
940 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
953 ast_expression::ast_expression(int oper
,
956 ast_expression
*ex2
) :
959 this->oper
= ast_operators(oper
);
960 this->subexpressions
[0] = ex0
;
961 this->subexpressions
[1] = ex1
;
962 this->subexpressions
[2] = ex2
;
963 this->non_lvalue_description
= NULL
;
968 ast_expression_statement::print(void) const
977 ast_expression_statement::ast_expression_statement(ast_expression
*ex
) :
985 ast_function::print(void) const
987 return_type
->print();
988 printf(" %s (", identifier
);
990 foreach_list_const(n
, & this->parameters
) {
991 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
999 ast_function::ast_function(void)
1000 : return_type(NULL
), identifier(NULL
), is_definition(false),
1008 ast_fully_specified_type::print(void) const
1010 _mesa_ast_type_qualifier_print(& qualifier
);
1016 ast_parameter_declarator::print(void) const
1020 printf("%s ", identifier
);
1021 ast_opt_array_dimensions_print(is_array
, array_specifier
);
1026 ast_function_definition::print(void) const
1034 ast_declaration::print(void) const
1036 printf("%s ", identifier
);
1037 ast_opt_array_dimensions_print(is_array
, array_specifier
);
1041 initializer
->print();
1046 ast_declaration::ast_declaration(const char *identifier
, bool is_array
,
1047 ast_array_specifier
*array_specifier
,
1048 ast_expression
*initializer
)
1050 this->identifier
= identifier
;
1051 this->is_array
= is_array
;
1052 this->array_specifier
= array_specifier
;
1053 this->initializer
= initializer
;
1058 ast_declarator_list::print(void) const
1060 assert(type
|| invariant
);
1065 printf("invariant ");
1067 foreach_list_const (ptr
, & this->declarations
) {
1068 if (ptr
!= this->declarations
.get_head())
1071 ast_node
*ast
= exec_node_data(ast_node
, ptr
, link
);
1079 ast_declarator_list::ast_declarator_list(ast_fully_specified_type
*type
)
1082 this->invariant
= false;
1086 ast_jump_statement::print(void) const
1090 printf("continue; ");
1097 if (opt_return_value
)
1098 opt_return_value
->print();
1103 printf("discard; ");
1109 ast_jump_statement::ast_jump_statement(int mode
, ast_expression
*return_value
)
1110 : opt_return_value(NULL
)
1112 this->mode
= ast_jump_modes(mode
);
1114 if (mode
== ast_return
)
1115 opt_return_value
= return_value
;
1120 ast_selection_statement::print(void) const
1126 then_statement
->print();
1128 if (else_statement
) {
1130 else_statement
->print();
1136 ast_selection_statement::ast_selection_statement(ast_expression
*condition
,
1137 ast_node
*then_statement
,
1138 ast_node
*else_statement
)
1140 this->condition
= condition
;
1141 this->then_statement
= then_statement
;
1142 this->else_statement
= else_statement
;
1147 ast_switch_statement::print(void) const
1149 printf("switch ( ");
1150 test_expression
->print();
1157 ast_switch_statement::ast_switch_statement(ast_expression
*test_expression
,
1160 this->test_expression
= test_expression
;
1166 ast_switch_body::print(void) const
1169 if (stmts
!= NULL
) {
1176 ast_switch_body::ast_switch_body(ast_case_statement_list
*stmts
)
1178 this->stmts
= stmts
;
1182 void ast_case_label::print(void) const
1184 if (test_value
!= NULL
) {
1186 test_value
->print();
1189 printf("default: ");
1194 ast_case_label::ast_case_label(ast_expression
*test_value
)
1196 this->test_value
= test_value
;
1200 void ast_case_label_list::print(void) const
1202 foreach_list_const(n
, & this->labels
) {
1203 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1210 ast_case_label_list::ast_case_label_list(void)
1215 void ast_case_statement::print(void) const
1218 foreach_list_const(n
, & this->stmts
) {
1219 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1226 ast_case_statement::ast_case_statement(ast_case_label_list
*labels
)
1228 this->labels
= labels
;
1232 void ast_case_statement_list::print(void) const
1234 foreach_list_const(n
, & this->cases
) {
1235 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1241 ast_case_statement_list::ast_case_statement_list(void)
1247 ast_iteration_statement::print(void) const
1253 init_statement
->print();
1260 if (rest_expression
)
1261 rest_expression
->print();
1287 ast_iteration_statement::ast_iteration_statement(int mode
,
1289 ast_node
*condition
,
1290 ast_expression
*rest_expression
,
1293 this->mode
= ast_iteration_modes(mode
);
1294 this->init_statement
= init
;
1295 this->condition
= condition
;
1296 this->rest_expression
= rest_expression
;
1302 ast_struct_specifier::print(void) const
1304 printf("struct %s { ", name
);
1305 foreach_list_const(n
, &this->declarations
) {
1306 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1313 ast_struct_specifier::ast_struct_specifier(const char *identifier
,
1314 ast_declarator_list
*declarator_list
)
1316 if (identifier
== NULL
) {
1317 static unsigned anon_count
= 1;
1318 identifier
= ralloc_asprintf(this, "#anon_struct_%04x", anon_count
);
1322 this->declarations
.push_degenerate_list_at_head(&declarator_list
->link
);
1323 is_declaration
= true;
1327 set_shader_inout_layout(struct gl_shader
*shader
,
1328 struct _mesa_glsl_parse_state
*state
)
1330 if (shader
->Stage
!= MESA_SHADER_GEOMETRY
) {
1331 /* Should have been prevented by the parser. */
1332 assert(!state
->gs_input_prim_type_specified
);
1333 assert(!state
->out_qualifier
->flags
.i
);
1337 shader
->Geom
.VerticesOut
= 0;
1338 if (state
->out_qualifier
->flags
.q
.max_vertices
)
1339 shader
->Geom
.VerticesOut
= state
->out_qualifier
->max_vertices
;
1341 if (state
->gs_input_prim_type_specified
) {
1342 shader
->Geom
.InputType
= state
->gs_input_prim_type
;
1344 shader
->Geom
.InputType
= PRIM_UNKNOWN
;
1347 if (state
->out_qualifier
->flags
.q
.prim_type
) {
1348 shader
->Geom
.OutputType
= state
->out_qualifier
->prim_type
;
1350 shader
->Geom
.OutputType
= PRIM_UNKNOWN
;
1357 _mesa_glsl_compile_shader(struct gl_context
*ctx
, struct gl_shader
*shader
,
1358 bool dump_ast
, bool dump_hir
)
1360 struct _mesa_glsl_parse_state
*state
=
1361 new(shader
) _mesa_glsl_parse_state(ctx
, shader
->Stage
, shader
);
1362 const char *source
= shader
->Source
;
1364 state
->error
= glcpp_preprocess(state
, &source
, &state
->info_log
,
1365 &ctx
->Extensions
, ctx
);
1367 if (!state
->error
) {
1368 _mesa_glsl_lexer_ctor(state
, source
);
1369 _mesa_glsl_parse(state
);
1370 _mesa_glsl_lexer_dtor(state
);
1374 foreach_list_const(n
, &state
->translation_unit
) {
1375 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1381 ralloc_free(shader
->ir
);
1382 shader
->ir
= new(shader
) exec_list
;
1383 if (!state
->error
&& !state
->translation_unit
.is_empty())
1384 _mesa_ast_to_hir(shader
->ir
, state
);
1386 if (!state
->error
) {
1387 validate_ir_tree(shader
->ir
);
1389 /* Print out the unoptimized IR. */
1391 _mesa_print_ir(shader
->ir
, state
);
1396 if (!state
->error
&& !shader
->ir
->is_empty()) {
1397 struct gl_shader_compiler_options
*options
=
1398 &ctx
->ShaderCompilerOptions
[shader
->Stage
];
1400 /* Do some optimization at compile time to reduce shader IR size
1401 * and reduce later work if the same shader is linked multiple times
1403 while (do_common_optimization(shader
->ir
, false, false, 32, options
))
1406 validate_ir_tree(shader
->ir
);
1409 if (shader
->InfoLog
)
1410 ralloc_free(shader
->InfoLog
);
1412 shader
->symbols
= state
->symbols
;
1413 shader
->CompileStatus
= !state
->error
;
1414 shader
->InfoLog
= state
->info_log
;
1415 shader
->Version
= state
->language_version
;
1416 shader
->IsES
= state
->es_shader
;
1417 shader
->uses_builtin_functions
= state
->uses_builtin_functions
;
1419 if (shader
->UniformBlocks
)
1420 ralloc_free(shader
->UniformBlocks
);
1421 shader
->NumUniformBlocks
= state
->num_uniform_blocks
;
1422 shader
->UniformBlocks
= state
->uniform_blocks
;
1423 ralloc_steal(shader
, shader
->UniformBlocks
);
1426 set_shader_inout_layout(shader
, state
);
1428 /* Retain any live IR, but trash the rest. */
1429 reparent_ir(shader
->ir
, shader
->ir
);
1436 * Do the set of common optimizations passes
1438 * \param ir List of instructions to be optimized
1439 * \param linked Is the shader linked? This enables
1440 * optimizations passes that remove code at
1441 * global scope and could cause linking to
1443 * \param uniform_locations_assigned Have locations already been assigned for
1444 * uniforms? This prevents the declarations
1445 * of unused uniforms from being removed.
1446 * The setting of this flag only matters if
1447 * \c linked is \c true.
1448 * \param max_unroll_iterations Maximum number of loop iterations to be
1449 * unrolled. Setting to 0 disables loop
1451 * \param options The driver's preferred shader options.
1454 do_common_optimization(exec_list
*ir
, bool linked
,
1455 bool uniform_locations_assigned
,
1456 unsigned max_unroll_iterations
,
1457 const struct gl_shader_compiler_options
*options
)
1459 GLboolean progress
= GL_FALSE
;
1461 progress
= lower_instructions(ir
, SUB_TO_ADD_NEG
) || progress
;
1464 progress
= do_function_inlining(ir
) || progress
;
1465 progress
= do_dead_functions(ir
) || progress
;
1466 progress
= do_structure_splitting(ir
) || progress
;
1468 progress
= do_if_simplification(ir
) || progress
;
1469 progress
= opt_flatten_nested_if_blocks(ir
) || progress
;
1470 progress
= do_copy_propagation(ir
) || progress
;
1471 progress
= do_copy_propagation_elements(ir
) || progress
;
1473 if (options
->OptimizeForAOS
&& !linked
)
1474 progress
= opt_flip_matrices(ir
) || progress
;
1476 if (linked
&& options
->OptimizeForAOS
) {
1477 progress
= do_vectorize(ir
) || progress
;
1481 progress
= do_dead_code(ir
, uniform_locations_assigned
) || progress
;
1483 progress
= do_dead_code_unlinked(ir
) || progress
;
1484 progress
= do_dead_code_local(ir
) || progress
;
1485 progress
= do_tree_grafting(ir
) || progress
;
1486 progress
= do_constant_propagation(ir
) || progress
;
1488 progress
= do_constant_variable(ir
) || progress
;
1490 progress
= do_constant_variable_unlinked(ir
) || progress
;
1491 progress
= do_constant_folding(ir
) || progress
;
1492 progress
= do_cse(ir
) || progress
;
1493 progress
= do_algebraic(ir
) || progress
;
1494 progress
= do_lower_jumps(ir
) || progress
;
1495 progress
= do_vec_index_to_swizzle(ir
) || progress
;
1496 progress
= lower_vector_insert(ir
, false) || progress
;
1497 progress
= do_swizzle_swizzle(ir
) || progress
;
1498 progress
= do_noop_swizzle(ir
) || progress
;
1500 progress
= optimize_split_arrays(ir
, linked
) || progress
;
1501 progress
= optimize_redundant_jumps(ir
) || progress
;
1503 loop_state
*ls
= analyze_loop_variables(ir
);
1504 if (ls
->loop_found
) {
1505 progress
= set_loop_controls(ir
, ls
) || progress
;
1506 progress
= unroll_loops(ir
, ls
, max_unroll_iterations
) || progress
;
1516 * To be called at GL teardown time, this frees compiler datastructures.
1518 * After calling this, any previously compiled shaders and shader
1519 * programs would be invalid. So this should happen at approximately
1523 _mesa_destroy_shader_compiler(void)
1525 _mesa_destroy_shader_compiler_caches();
1527 _mesa_glsl_release_types();
1531 * Releases compiler caches to trade off performance for memory.
1533 * Intended to be used with glReleaseShaderCompiler().
1536 _mesa_destroy_shader_compiler_caches(void)
1538 _mesa_glsl_release_builtin_functions();