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 GLenum target
, void *mem_ctx
)
61 case GL_VERTEX_SHADER
: this->target
= vertex_shader
; break;
62 case GL_FRAGMENT_SHADER
: this->target
= fragment_shader
; break;
63 case GL_GEOMETRY_SHADER
: this->target
= geometry_shader
; break;
67 this->translation_unit
.make_empty();
68 this->symbols
= new(mem_ctx
) glsl_symbol_table
;
69 this->info_log
= ralloc_strdup(mem_ctx
, "");
71 this->loop_nesting_ast
= NULL
;
72 this->switch_state
.switch_nesting_ast
= NULL
;
74 this->num_builtins_to_link
= 0;
76 /* Set default language version and extensions */
77 this->language_version
= 110;
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
.VertexProgram
.MaxAttribs
;
95 this->Const
.MaxVertexUniformComponents
= ctx
->Const
.VertexProgram
.MaxUniformComponents
;
96 this->Const
.MaxVaryingFloats
= ctx
->Const
.MaxVarying
* 4;
97 this->Const
.MaxVertexTextureImageUnits
= ctx
->Const
.VertexProgram
.MaxTextureImageUnits
;
98 this->Const
.MaxCombinedTextureImageUnits
= ctx
->Const
.MaxCombinedTextureImageUnits
;
99 this->Const
.MaxTextureImageUnits
= ctx
->Const
.FragmentProgram
.MaxTextureImageUnits
;
100 this->Const
.MaxFragmentUniformComponents
= ctx
->Const
.FragmentProgram
.MaxUniformComponents
;
101 this->Const
.MinProgramTexelOffset
= ctx
->Const
.MinProgramTexelOffset
;
102 this->Const
.MaxProgramTexelOffset
= ctx
->Const
.MaxProgramTexelOffset
;
104 this->Const
.MaxDrawBuffers
= ctx
->Const
.MaxDrawBuffers
;
106 /* Populate the list of supported GLSL versions */
107 /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
108 * the OpenGL 3.2 Core context is supported, this logic will need
109 * change. Older versions of GLSL are no longer supported
110 * outside the compatibility contexts of 3.x.
112 this->num_supported_versions
= 0;
113 if (_mesa_is_desktop_gl(ctx
)) {
114 for (unsigned i
= 0; i
< ARRAY_SIZE(known_desktop_glsl_versions
); i
++) {
115 if (known_desktop_glsl_versions
[i
] <= ctx
->Const
.GLSLVersion
) {
116 this->supported_versions
[this->num_supported_versions
].ver
117 = known_desktop_glsl_versions
[i
];
118 this->supported_versions
[this->num_supported_versions
].es
= false;
119 this->num_supported_versions
++;
123 if (ctx
->API
== API_OPENGLES2
|| ctx
->Extensions
.ARB_ES2_compatibility
) {
124 this->supported_versions
[this->num_supported_versions
].ver
= 100;
125 this->supported_versions
[this->num_supported_versions
].es
= true;
126 this->num_supported_versions
++;
128 if (_mesa_is_gles3(ctx
) || ctx
->Extensions
.ARB_ES3_compatibility
) {
129 this->supported_versions
[this->num_supported_versions
].ver
= 300;
130 this->supported_versions
[this->num_supported_versions
].es
= true;
131 this->num_supported_versions
++;
133 assert(this->num_supported_versions
134 <= ARRAY_SIZE(this->supported_versions
));
136 /* Create a string for use in error messages to tell the user which GLSL
137 * versions are supported.
139 char *supported
= ralloc_strdup(this, "");
140 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
141 unsigned ver
= this->supported_versions
[i
].ver
;
142 const char *const prefix
= (i
== 0)
144 : ((i
== this->num_supported_versions
- 1) ? ", and " : ", ");
145 const char *const suffix
= (this->supported_versions
[i
].es
) ? " ES" : "";
147 ralloc_asprintf_append(& supported
, "%s%u.%02u%s",
149 ver
/ 100, ver
% 100,
153 this->supported_version_string
= supported
;
155 if (ctx
->Const
.ForceGLSLExtensionsWarn
)
156 _mesa_glsl_process_extension("all", NULL
, "warn", NULL
, this);
158 this->default_uniform_qualifier
= new(this) ast_type_qualifier();
159 this->default_uniform_qualifier
->flags
.q
.shared
= 1;
160 this->default_uniform_qualifier
->flags
.q
.column_major
= 1;
164 * Determine whether the current GLSL version is sufficiently high to support
165 * a certain feature, and generate an error message if it isn't.
167 * \param required_glsl_version and \c required_glsl_es_version are
168 * interpreted as they are in _mesa_glsl_parse_state::is_version().
170 * \param locp is the parser location where the error should be reported.
172 * \param fmt (and additional arguments) constitute a printf-style error
173 * message to report if the version check fails. Information about the
174 * current and required GLSL versions will be appended. So, for example, if
175 * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
176 * "foo unsupported") is called, the error message will be "foo unsupported in
177 * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
180 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version
,
181 unsigned required_glsl_es_version
,
182 YYLTYPE
*locp
, const char *fmt
, ...)
184 if (this->is_version(required_glsl_version
, required_glsl_es_version
))
189 char *problem
= ralloc_vasprintf(this, fmt
, args
);
191 const char *glsl_version_string
192 = glsl_compute_version_string(this, false, required_glsl_version
);
193 const char *glsl_es_version_string
194 = glsl_compute_version_string(this, true, required_glsl_es_version
);
195 const char *requirement_string
= "";
196 if (required_glsl_version
&& required_glsl_es_version
) {
197 requirement_string
= ralloc_asprintf(this, " (%s or %s required)",
199 glsl_es_version_string
);
200 } else if (required_glsl_version
) {
201 requirement_string
= ralloc_asprintf(this, " (%s required)",
202 glsl_version_string
);
203 } else if (required_glsl_es_version
) {
204 requirement_string
= ralloc_asprintf(this, " (%s required)",
205 glsl_es_version_string
);
207 _mesa_glsl_error(locp
, this, "%s in %s%s",
208 problem
, this->get_version_string(),
215 * Process a GLSL #version directive.
217 * \param version is the integer that follows the #version token.
219 * \param ident is a string identifier that follows the integer, if any is
220 * present. Otherwise NULL.
223 _mesa_glsl_parse_state::process_version_directive(YYLTYPE
*locp
, int version
,
226 bool es_token_present
= false;
228 if (strcmp(ident
, "es") == 0) {
229 es_token_present
= true;
230 } else if (version
>= 150) {
231 if (strcmp(ident
, "core") == 0) {
232 /* Accept the token. There's no need to record that this is
233 * a core profile shader since that's the only profile we support.
235 } else if (strcmp(ident
, "compatibility") == 0) {
236 _mesa_glsl_error(locp
, this,
237 "the compatibility profile is not supported");
239 _mesa_glsl_error(locp
, this,
240 "\"%s\" is not a valid shading language profile; "
241 "if present, it must be \"core\"", ident
);
244 _mesa_glsl_error(locp
, this,
245 "illegal text following version number");
249 this->es_shader
= es_token_present
;
250 if (version
== 100) {
251 if (es_token_present
) {
252 _mesa_glsl_error(locp
, this,
253 "GLSL 1.00 ES should be selected using "
256 this->es_shader
= true;
260 this->language_version
= version
;
262 bool supported
= false;
263 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
264 if (this->supported_versions
[i
].ver
== (unsigned) version
265 && this->supported_versions
[i
].es
== this->es_shader
) {
272 _mesa_glsl_error(locp
, this, "%s is not supported. "
273 "Supported versions are: %s",
274 this->get_version_string(),
275 this->supported_version_string
);
277 /* On exit, the language_version must be set to a valid value.
278 * Later calls to _mesa_glsl_initialize_types will misbehave if
279 * the version is invalid.
281 switch (this->ctx
->API
) {
282 case API_OPENGL_COMPAT
:
283 case API_OPENGL_CORE
:
284 this->language_version
= this->ctx
->Const
.GLSLVersion
;
288 assert(!"Should not get here.");
292 this->language_version
= 100;
297 if (this->language_version
>= 140) {
298 this->ARB_uniform_buffer_object_enable
= true;
301 if (this->language_version
== 300 && this->es_shader
) {
302 this->ARB_explicit_attrib_location_enable
= true;
309 * The most common use of _mesa_glsl_shader_target_name(), which is
310 * shared with C code in Mesa core to translate a GLenum to a short
311 * shader stage name in debug printouts.
313 * It recognizes the PROGRAM variants of the names so it can be used
314 * with a struct gl_program->Target, not just a struct
318 _mesa_glsl_shader_target_name(GLenum type
)
321 case GL_VERTEX_SHADER
:
322 case GL_VERTEX_PROGRAM_ARB
:
324 case GL_FRAGMENT_SHADER
:
325 case GL_FRAGMENT_PROGRAM_ARB
:
327 case GL_GEOMETRY_SHADER
:
330 assert(!"Should not get here.");
338 * Overloaded C++ variant usable within the compiler for translating
339 * our internal enum into short stage names.
342 _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target
)
345 case vertex_shader
: return "vertex";
346 case fragment_shader
: return "fragment";
347 case geometry_shader
: return "geometry";
350 assert(!"Should not get here.");
354 /* This helper function will append the given message to the shader's
355 info log and report it via GL_ARB_debug_output. Per that extension,
356 'type' is one of the enum values classifying the message, and
357 'id' is the implementation-defined ID of the given message. */
359 _mesa_glsl_msg(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
360 GLenum type
, const char *fmt
, va_list ap
)
362 bool error
= (type
== MESA_DEBUG_TYPE_ERROR
);
365 assert(state
->info_log
!= NULL
);
367 /* Get the offset that the new message will be written to. */
368 int msg_offset
= strlen(state
->info_log
);
370 ralloc_asprintf_append(&state
->info_log
, "%u:%u(%u): %s: ",
374 error
? "error" : "warning");
375 ralloc_vasprintf_append(&state
->info_log
, fmt
, ap
);
377 const char *const msg
= &state
->info_log
[msg_offset
];
378 struct gl_context
*ctx
= state
->ctx
;
380 /* Report the error via GL_ARB_debug_output. */
381 _mesa_shader_debug(ctx
, type
, &msg_id
, msg
, strlen(msg
));
383 ralloc_strcat(&state
->info_log
, "\n");
387 _mesa_glsl_error(YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
388 const char *fmt
, ...)
395 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_ERROR
, fmt
, ap
);
401 _mesa_glsl_warning(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
402 const char *fmt
, ...)
407 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_OTHER
, fmt
, ap
);
413 * Enum representing the possible behaviors that can be specified in
414 * an #extension directive.
424 * Element type for _mesa_glsl_supported_extensions
426 struct _mesa_glsl_extension
{
428 * Name of the extension when referred to in a GLSL extension
433 /** True if this extension is available to desktop GL shaders */
436 /** True if this extension is available to GLES shaders */
440 * Flag in the gl_extensions struct indicating whether this
441 * extension is supported by the driver, or
442 * &gl_extensions::dummy_true if supported by all drivers.
444 * Note: the type (GLboolean gl_extensions::*) is a "pointer to
445 * member" type, the type-safe alternative to the "offsetof" macro.
448 * - foo bar::* p declares p to be an "offset" to a field of type
449 * foo that exists within struct bar
450 * - &bar::baz computes the "offset" of field baz within struct bar
451 * - x.*p accesses the field of x that exists at "offset" p
452 * - x->*p is equivalent to (*x).*p
454 const GLboolean
gl_extensions::* supported_flag
;
457 * Flag in the _mesa_glsl_parse_state struct that should be set
458 * when this extension is enabled.
460 * See note in _mesa_glsl_extension::supported_flag about "pointer
463 bool _mesa_glsl_parse_state::* enable_flag
;
466 * Flag in the _mesa_glsl_parse_state struct that should be set
467 * when the shader requests "warn" behavior for this extension.
469 * See note in _mesa_glsl_extension::supported_flag about "pointer
472 bool _mesa_glsl_parse_state::* warn_flag
;
475 bool compatible_with_state(const _mesa_glsl_parse_state
*state
) const;
476 void set_flags(_mesa_glsl_parse_state
*state
, ext_behavior behavior
) const;
479 #define EXT(NAME, GL, ES, SUPPORTED_FLAG) \
480 { "GL_" #NAME, GL, ES, &gl_extensions::SUPPORTED_FLAG, \
481 &_mesa_glsl_parse_state::NAME##_enable, \
482 &_mesa_glsl_parse_state::NAME##_warn }
485 * Table of extensions that can be enabled/disabled within a shader,
486 * and the conditions under which they are supported.
488 static const _mesa_glsl_extension _mesa_glsl_supported_extensions
[] = {
489 /* API availability */
490 /* name GL ES supported flag */
491 EXT(ARB_conservative_depth
, true, false, ARB_conservative_depth
),
492 EXT(ARB_draw_buffers
, true, false, dummy_true
),
493 EXT(ARB_draw_instanced
, true, false, ARB_draw_instanced
),
494 EXT(ARB_explicit_attrib_location
, true, false, ARB_explicit_attrib_location
),
495 EXT(ARB_fragment_coord_conventions
, true, false, ARB_fragment_coord_conventions
),
496 EXT(ARB_texture_rectangle
, true, false, dummy_true
),
497 EXT(EXT_texture_array
, true, false, EXT_texture_array
),
498 EXT(ARB_shader_texture_lod
, true, false, ARB_shader_texture_lod
),
499 EXT(ARB_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
500 EXT(AMD_conservative_depth
, true, false, ARB_conservative_depth
),
501 EXT(AMD_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
502 EXT(OES_texture_3D
, false, true, EXT_texture3D
),
503 EXT(OES_EGL_image_external
, false, true, OES_EGL_image_external
),
504 EXT(ARB_shader_bit_encoding
, true, false, ARB_shader_bit_encoding
),
505 EXT(ARB_uniform_buffer_object
, true, false, ARB_uniform_buffer_object
),
506 EXT(OES_standard_derivatives
, false, true, OES_standard_derivatives
),
507 EXT(ARB_texture_cube_map_array
, true, false, ARB_texture_cube_map_array
),
508 EXT(ARB_shading_language_packing
, true, false, ARB_shading_language_packing
),
509 EXT(ARB_shading_language_420pack
, true, false, ARB_shading_language_420pack
),
510 EXT(ARB_texture_multisample
, true, false, ARB_texture_multisample
),
511 EXT(ARB_texture_query_lod
, true, false, ARB_texture_query_lod
),
512 EXT(ARB_gpu_shader5
, true, false, ARB_gpu_shader5
),
513 EXT(AMD_vertex_shader_layer
, true, false, AMD_vertex_shader_layer
),
520 * Determine whether a given extension is compatible with the target,
521 * API, and extension information in the current parser state.
523 bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state
*
526 /* Check that this extension matches whether we are compiling
527 * for desktop GL or GLES.
529 if (state
->es_shader
) {
530 if (!this->avail_in_ES
) return false;
532 if (!this->avail_in_GL
) return false;
535 /* Check that this extension is supported by the OpenGL
538 * Note: the ->* operator indexes into state->extensions by the
539 * offset this->supported_flag. See
540 * _mesa_glsl_extension::supported_flag for more info.
542 return state
->extensions
->*(this->supported_flag
);
546 * Set the appropriate flags in the parser state to establish the
547 * given behavior for this extension.
549 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state
*state
,
550 ext_behavior behavior
) const
552 /* Note: the ->* operator indexes into state by the
553 * offsets this->enable_flag and this->warn_flag. See
554 * _mesa_glsl_extension::supported_flag for more info.
556 state
->*(this->enable_flag
) = (behavior
!= extension_disable
);
557 state
->*(this->warn_flag
) = (behavior
== extension_warn
);
561 * Find an extension by name in _mesa_glsl_supported_extensions. If
562 * the name is not found, return NULL.
564 static const _mesa_glsl_extension
*find_extension(const char *name
)
566 for (unsigned i
= 0; i
< Elements(_mesa_glsl_supported_extensions
); ++i
) {
567 if (strcmp(name
, _mesa_glsl_supported_extensions
[i
].name
) == 0) {
568 return &_mesa_glsl_supported_extensions
[i
];
576 _mesa_glsl_process_extension(const char *name
, YYLTYPE
*name_locp
,
577 const char *behavior_string
, YYLTYPE
*behavior_locp
,
578 _mesa_glsl_parse_state
*state
)
580 ext_behavior behavior
;
581 if (strcmp(behavior_string
, "warn") == 0) {
582 behavior
= extension_warn
;
583 } else if (strcmp(behavior_string
, "require") == 0) {
584 behavior
= extension_require
;
585 } else if (strcmp(behavior_string
, "enable") == 0) {
586 behavior
= extension_enable
;
587 } else if (strcmp(behavior_string
, "disable") == 0) {
588 behavior
= extension_disable
;
590 _mesa_glsl_error(behavior_locp
, state
,
591 "unknown extension behavior `%s'",
596 if (strcmp(name
, "all") == 0) {
597 if ((behavior
== extension_enable
) || (behavior
== extension_require
)) {
598 _mesa_glsl_error(name_locp
, state
, "cannot %s all extensions",
599 (behavior
== extension_enable
)
600 ? "enable" : "require");
604 i
< Elements(_mesa_glsl_supported_extensions
); ++i
) {
605 const _mesa_glsl_extension
*extension
606 = &_mesa_glsl_supported_extensions
[i
];
607 if (extension
->compatible_with_state(state
)) {
608 _mesa_glsl_supported_extensions
[i
].set_flags(state
, behavior
);
613 const _mesa_glsl_extension
*extension
= find_extension(name
);
614 if (extension
&& extension
->compatible_with_state(state
)) {
615 extension
->set_flags(state
, behavior
);
617 static const char *const fmt
= "extension `%s' unsupported in %s shader";
619 if (behavior
== extension_require
) {
620 _mesa_glsl_error(name_locp
, state
, fmt
,
621 name
, _mesa_glsl_shader_target_name(state
->target
));
624 _mesa_glsl_warning(name_locp
, state
, fmt
,
625 name
, _mesa_glsl_shader_target_name(state
->target
));
635 * Returns the name of the type of a column of a matrix. E.g.,
641 _mesa_ast_get_matrix_column_type_name(const char *matrix_type_name
)
643 static const char *vec_name
[] = { "vec2", "vec3", "vec4" };
645 /* The number of elements in a row of a matrix is specified by the last
646 * character of the matrix type name.
648 long rows
= strtol(matrix_type_name
+ strlen(matrix_type_name
) - 1,
650 return vec_name
[rows
- 2];
654 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
655 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
656 * (process_array_constructor, et al) sufficient information to do type
659 * Operates on assignments involving an aggregate initializer. E.g.,
661 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
663 * or more ridiculously,
676 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
677 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
682 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
683 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
689 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
690 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
696 * This pass is necessary because the right-hand side of <type> e = { ... }
697 * doesn't contain sufficient information to determine if the types match.
700 _mesa_ast_set_aggregate_type(const ast_type_specifier
*type
,
701 ast_expression
*expr
,
702 _mesa_glsl_parse_state
*state
)
705 ast_aggregate_initializer
*ai
= (ast_aggregate_initializer
*)expr
;
706 ai
->constructor_type
= (ast_type_specifier
*)type
;
708 bool is_declaration
= ai
->constructor_type
->structure
!= NULL
;
709 if (!is_declaration
) {
710 /* Look up <type> name in the symbol table to see if it's a struct. */
711 const ast_type_specifier
*struct_type
=
712 state
->symbols
->get_type_ast(type
->type_name
);
713 ai
->constructor_type
->structure
=
714 struct_type
? new(ctx
) ast_struct_specifier(*struct_type
->structure
)
718 /* If the aggregate is an array, recursively set its elements' types. */
719 if (type
->is_array
) {
720 /* We want to set the element type which is not an array itself, so make
721 * a copy of the array type and set its is_array field to false.
723 * E.g., if <type> if struct S[2] we want to set each element's type to
726 * FINISHME: Update when ARB_array_of_arrays is supported.
728 const ast_type_specifier
*non_array_type
=
729 new(ctx
) ast_type_specifier(type
, false, NULL
);
731 for (exec_node
*expr_node
= ai
->expressions
.head
;
732 !expr_node
->is_tail_sentinel();
733 expr_node
= expr_node
->next
) {
734 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
737 if (expr
->oper
== ast_aggregate
)
738 _mesa_ast_set_aggregate_type(non_array_type
, expr
, state
);
741 /* If the aggregate is a struct, recursively set its fields' types. */
742 } else if (ai
->constructor_type
->structure
) {
743 ai
->constructor_type
->structure
->is_declaration
= is_declaration
;
744 exec_node
*expr_node
= ai
->expressions
.head
;
746 /* Iterate through the struct's fields' declarations. E.g., iterate from
747 * "float a, b" to "int c" in the struct below.
754 for (exec_node
*decl_list_node
=
755 ai
->constructor_type
->structure
->declarations
.head
;
756 !decl_list_node
->is_tail_sentinel();
757 decl_list_node
= decl_list_node
->next
) {
758 ast_declarator_list
*decl_list
= exec_node_data(ast_declarator_list
,
759 decl_list_node
, link
);
761 for (exec_node
*decl_node
= decl_list
->declarations
.head
;
762 !decl_node
->is_tail_sentinel() && !expr_node
->is_tail_sentinel();
763 decl_node
= decl_node
->next
, expr_node
= expr_node
->next
) {
764 ast_declaration
*decl
= exec_node_data(ast_declaration
, decl_node
,
766 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
769 bool is_array
= decl_list
->type
->specifier
->is_array
;
770 ast_expression
*array_size
= decl_list
->type
->specifier
->array_size
;
772 /* Recognize variable declarations with the bracketed size attached
773 * to the type rather than the variable name as arrays. E.g.,
778 * are both arrays, but <a>'s array_size is decl->array_size, while
779 * <b>'s array_size is decl_list->type->specifier->array_size.
782 /* FINISHME: Update when ARB_array_of_arrays is supported. */
783 is_array
= decl
->is_array
;
784 array_size
= decl
->array_size
;
787 /* Declaration shadows the <type> parameter. */
788 ast_type_specifier
*type
=
789 new(ctx
) ast_type_specifier(decl_list
->type
->specifier
,
790 is_array
, array_size
);
792 if (expr
->oper
== ast_aggregate
)
793 _mesa_ast_set_aggregate_type(type
, expr
, state
);
797 /* If the aggregate is a matrix, set its columns' types. */
799 const glsl_type
*const constructor_type
=
800 ai
->constructor_type
->glsl_type(&name
, state
);
802 if (constructor_type
->is_matrix()) {
803 for (exec_node
*expr_node
= ai
->expressions
.head
;
804 !expr_node
->is_tail_sentinel();
805 expr_node
= expr_node
->next
) {
806 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
809 /* Declaration shadows the <type> parameter. */
810 ast_type_specifier
*type
= new(ctx
)
811 ast_type_specifier(_mesa_ast_get_matrix_column_type_name(name
));
813 if (expr
->oper
== ast_aggregate
)
814 _mesa_ast_set_aggregate_type(type
, expr
, state
);
822 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier
*q
)
824 if (q
->flags
.q
.constant
)
827 if (q
->flags
.q
.invariant
)
828 printf("invariant ");
830 if (q
->flags
.q
.attribute
)
831 printf("attribute ");
833 if (q
->flags
.q
.varying
)
836 if (q
->flags
.q
.in
&& q
->flags
.q
.out
)
846 if (q
->flags
.q
.centroid
)
848 if (q
->flags
.q
.uniform
)
850 if (q
->flags
.q
.smooth
)
854 if (q
->flags
.q
.noperspective
)
855 printf("noperspective ");
860 ast_node::print(void) const
862 printf("unhandled node ");
866 ast_node::ast_node(void)
868 this->location
.source
= 0;
869 this->location
.line
= 0;
870 this->location
.column
= 0;
875 ast_opt_array_size_print(bool is_array
, const ast_expression
*array_size
)
889 ast_compound_statement::print(void) const
893 foreach_list_const(n
, &this->statements
) {
894 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
902 ast_compound_statement::ast_compound_statement(int new_scope
,
903 ast_node
*statements
)
905 this->new_scope
= new_scope
;
907 if (statements
!= NULL
) {
908 this->statements
.push_degenerate_list_at_head(&statements
->link
);
914 ast_expression::print(void) const
928 subexpressions
[0]->print();
929 printf("%s ", operator_string(oper
));
930 subexpressions
[1]->print();
933 case ast_field_selection
:
934 subexpressions
[0]->print();
935 printf(". %s ", primary_expression
.identifier
);
944 printf("%s ", operator_string(oper
));
945 subexpressions
[0]->print();
950 subexpressions
[0]->print();
951 printf("%s ", operator_string(oper
));
954 case ast_conditional
:
955 subexpressions
[0]->print();
957 subexpressions
[1]->print();
959 subexpressions
[2]->print();
962 case ast_array_index
:
963 subexpressions
[0]->print();
965 subexpressions
[1]->print();
969 case ast_function_call
: {
970 subexpressions
[0]->print();
973 foreach_list_const (n
, &this->expressions
) {
974 if (n
!= this->expressions
.get_head())
977 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
986 printf("%s ", primary_expression
.identifier
);
989 case ast_int_constant
:
990 printf("%d ", primary_expression
.int_constant
);
993 case ast_uint_constant
:
994 printf("%u ", primary_expression
.uint_constant
);
997 case ast_float_constant
:
998 printf("%f ", primary_expression
.float_constant
);
1001 case ast_bool_constant
:
1003 primary_expression
.bool_constant
1004 ? "true" : "false");
1007 case ast_sequence
: {
1009 foreach_list_const(n
, & this->expressions
) {
1010 if (n
!= this->expressions
.get_head())
1013 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1020 case ast_aggregate
: {
1022 foreach_list_const(n
, & this->expressions
) {
1023 if (n
!= this->expressions
.get_head())
1026 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1039 ast_expression::ast_expression(int oper
,
1040 ast_expression
*ex0
,
1041 ast_expression
*ex1
,
1042 ast_expression
*ex2
)
1044 this->oper
= ast_operators(oper
);
1045 this->subexpressions
[0] = ex0
;
1046 this->subexpressions
[1] = ex1
;
1047 this->subexpressions
[2] = ex2
;
1048 this->non_lvalue_description
= NULL
;
1053 ast_expression_statement::print(void) const
1056 expression
->print();
1062 ast_expression_statement::ast_expression_statement(ast_expression
*ex
) :
1070 ast_function::print(void) const
1072 return_type
->print();
1073 printf(" %s (", identifier
);
1075 foreach_list_const(n
, & this->parameters
) {
1076 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1084 ast_function::ast_function(void)
1085 : return_type(NULL
), identifier(NULL
), is_definition(false),
1093 ast_fully_specified_type::print(void) const
1095 _mesa_ast_type_qualifier_print(& qualifier
);
1101 ast_parameter_declarator::print(void) const
1105 printf("%s ", identifier
);
1106 ast_opt_array_size_print(is_array
, array_size
);
1111 ast_function_definition::print(void) const
1119 ast_declaration::print(void) const
1121 printf("%s ", identifier
);
1122 ast_opt_array_size_print(is_array
, array_size
);
1126 initializer
->print();
1131 ast_declaration::ast_declaration(const char *identifier
, bool is_array
,
1132 ast_expression
*array_size
,
1133 ast_expression
*initializer
)
1135 this->identifier
= identifier
;
1136 this->is_array
= is_array
;
1137 this->array_size
= array_size
;
1138 this->initializer
= initializer
;
1143 ast_declarator_list::print(void) const
1145 assert(type
|| invariant
);
1150 printf("invariant ");
1152 foreach_list_const (ptr
, & this->declarations
) {
1153 if (ptr
!= this->declarations
.get_head())
1156 ast_node
*ast
= exec_node_data(ast_node
, ptr
, link
);
1164 ast_declarator_list::ast_declarator_list(ast_fully_specified_type
*type
)
1167 this->invariant
= false;
1168 this->ubo_qualifiers_valid
= false;
1172 ast_jump_statement::print(void) const
1176 printf("continue; ");
1183 if (opt_return_value
)
1184 opt_return_value
->print();
1189 printf("discard; ");
1195 ast_jump_statement::ast_jump_statement(int mode
, ast_expression
*return_value
)
1196 : opt_return_value(NULL
)
1198 this->mode
= ast_jump_modes(mode
);
1200 if (mode
== ast_return
)
1201 opt_return_value
= return_value
;
1206 ast_selection_statement::print(void) const
1212 then_statement
->print();
1214 if (else_statement
) {
1216 else_statement
->print();
1222 ast_selection_statement::ast_selection_statement(ast_expression
*condition
,
1223 ast_node
*then_statement
,
1224 ast_node
*else_statement
)
1226 this->condition
= condition
;
1227 this->then_statement
= then_statement
;
1228 this->else_statement
= else_statement
;
1233 ast_switch_statement::print(void) const
1235 printf("switch ( ");
1236 test_expression
->print();
1243 ast_switch_statement::ast_switch_statement(ast_expression
*test_expression
,
1246 this->test_expression
= test_expression
;
1252 ast_switch_body::print(void) const
1255 if (stmts
!= NULL
) {
1262 ast_switch_body::ast_switch_body(ast_case_statement_list
*stmts
)
1264 this->stmts
= stmts
;
1268 void ast_case_label::print(void) const
1270 if (test_value
!= NULL
) {
1272 test_value
->print();
1275 printf("default: ");
1280 ast_case_label::ast_case_label(ast_expression
*test_value
)
1282 this->test_value
= test_value
;
1286 void ast_case_label_list::print(void) const
1288 foreach_list_const(n
, & this->labels
) {
1289 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1296 ast_case_label_list::ast_case_label_list(void)
1301 void ast_case_statement::print(void) const
1304 foreach_list_const(n
, & this->stmts
) {
1305 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1312 ast_case_statement::ast_case_statement(ast_case_label_list
*labels
)
1314 this->labels
= labels
;
1318 void ast_case_statement_list::print(void) const
1320 foreach_list_const(n
, & this->cases
) {
1321 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1327 ast_case_statement_list::ast_case_statement_list(void)
1333 ast_iteration_statement::print(void) const
1339 init_statement
->print();
1346 if (rest_expression
)
1347 rest_expression
->print();
1373 ast_iteration_statement::ast_iteration_statement(int mode
,
1375 ast_node
*condition
,
1376 ast_expression
*rest_expression
,
1379 this->mode
= ast_iteration_modes(mode
);
1380 this->init_statement
= init
;
1381 this->condition
= condition
;
1382 this->rest_expression
= rest_expression
;
1388 ast_struct_specifier::print(void) const
1390 printf("struct %s { ", name
);
1391 foreach_list_const(n
, &this->declarations
) {
1392 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1399 ast_struct_specifier::ast_struct_specifier(const char *identifier
,
1400 ast_declarator_list
*declarator_list
)
1402 if (identifier
== NULL
) {
1403 static unsigned anon_count
= 1;
1404 identifier
= ralloc_asprintf(this, "#anon_struct_%04x", anon_count
);
1408 this->declarations
.push_degenerate_list_at_head(&declarator_list
->link
);
1409 is_declaration
= true;
1415 _mesa_glsl_compile_shader(struct gl_context
*ctx
, struct gl_shader
*shader
,
1416 bool dump_ast
, bool dump_hir
)
1418 struct _mesa_glsl_parse_state
*state
=
1419 new(shader
) _mesa_glsl_parse_state(ctx
, shader
->Type
, shader
);
1420 const char *source
= shader
->Source
;
1422 state
->error
= glcpp_preprocess(state
, &source
, &state
->info_log
,
1423 &ctx
->Extensions
, ctx
);
1425 if (!state
->error
) {
1426 _mesa_glsl_lexer_ctor(state
, source
);
1427 _mesa_glsl_parse(state
);
1428 _mesa_glsl_lexer_dtor(state
);
1432 foreach_list_const(n
, &state
->translation_unit
) {
1433 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1439 ralloc_free(shader
->ir
);
1440 shader
->ir
= new(shader
) exec_list
;
1441 if (!state
->error
&& !state
->translation_unit
.is_empty())
1442 _mesa_ast_to_hir(shader
->ir
, state
);
1444 if (!state
->error
) {
1445 validate_ir_tree(shader
->ir
);
1447 /* Print out the unoptimized IR. */
1449 _mesa_print_ir(shader
->ir
, state
);
1454 if (!state
->error
&& !shader
->ir
->is_empty()) {
1455 struct gl_shader_compiler_options
*options
=
1456 &ctx
->ShaderCompilerOptions
[_mesa_shader_type_to_index(shader
->Type
)];
1458 /* Do some optimization at compile time to reduce shader IR size
1459 * and reduce later work if the same shader is linked multiple times
1461 while (do_common_optimization(shader
->ir
, false, false, 32, options
))
1464 validate_ir_tree(shader
->ir
);
1467 if (shader
->InfoLog
)
1468 ralloc_free(shader
->InfoLog
);
1470 shader
->symbols
= state
->symbols
;
1471 shader
->CompileStatus
= !state
->error
;
1472 shader
->InfoLog
= state
->info_log
;
1473 shader
->Version
= state
->language_version
;
1474 shader
->InfoLog
= state
->info_log
;
1475 shader
->IsES
= state
->es_shader
;
1477 memcpy(shader
->builtins_to_link
, state
->builtins_to_link
,
1478 sizeof(shader
->builtins_to_link
[0]) * state
->num_builtins_to_link
);
1479 shader
->num_builtins_to_link
= state
->num_builtins_to_link
;
1481 if (shader
->UniformBlocks
)
1482 ralloc_free(shader
->UniformBlocks
);
1483 shader
->NumUniformBlocks
= state
->num_uniform_blocks
;
1484 shader
->UniformBlocks
= state
->uniform_blocks
;
1485 ralloc_steal(shader
, shader
->UniformBlocks
);
1487 /* Retain any live IR, but trash the rest. */
1488 reparent_ir(shader
->ir
, shader
->ir
);
1495 * Do the set of common optimizations passes
1497 * \param ir List of instructions to be optimized
1498 * \param linked Is the shader linked? This enables
1499 * optimizations passes that remove code at
1500 * global scope and could cause linking to
1502 * \param uniform_locations_assigned Have locations already been assigned for
1503 * uniforms? This prevents the declarations
1504 * of unused uniforms from being removed.
1505 * The setting of this flag only matters if
1506 * \c linked is \c true.
1507 * \param max_unroll_iterations Maximum number of loop iterations to be
1508 * unrolled. Setting to 0 disables loop
1510 * \param options The driver's preferred shader options.
1513 do_common_optimization(exec_list
*ir
, bool linked
,
1514 bool uniform_locations_assigned
,
1515 unsigned max_unroll_iterations
,
1516 const struct gl_shader_compiler_options
*options
)
1518 GLboolean progress
= GL_FALSE
;
1520 progress
= lower_instructions(ir
, SUB_TO_ADD_NEG
) || progress
;
1523 progress
= do_function_inlining(ir
) || progress
;
1524 progress
= do_dead_functions(ir
) || progress
;
1525 progress
= do_structure_splitting(ir
) || progress
;
1527 progress
= do_if_simplification(ir
) || progress
;
1528 progress
= opt_flatten_nested_if_blocks(ir
) || progress
;
1529 progress
= do_copy_propagation(ir
) || progress
;
1530 progress
= do_copy_propagation_elements(ir
) || progress
;
1532 if (options
->PreferDP4
&& !linked
)
1533 progress
= opt_flip_matrices(ir
) || progress
;
1536 progress
= do_dead_code(ir
, uniform_locations_assigned
) || progress
;
1538 progress
= do_dead_code_unlinked(ir
) || progress
;
1539 progress
= do_dead_code_local(ir
) || progress
;
1540 progress
= do_tree_grafting(ir
) || progress
;
1541 progress
= do_constant_propagation(ir
) || progress
;
1543 progress
= do_constant_variable(ir
) || progress
;
1545 progress
= do_constant_variable_unlinked(ir
) || progress
;
1546 progress
= do_constant_folding(ir
) || progress
;
1547 progress
= do_algebraic(ir
) || progress
;
1548 progress
= do_lower_jumps(ir
) || progress
;
1549 progress
= do_vec_index_to_swizzle(ir
) || progress
;
1550 progress
= lower_vector_insert(ir
, false) || progress
;
1551 progress
= do_swizzle_swizzle(ir
) || progress
;
1552 progress
= do_noop_swizzle(ir
) || progress
;
1554 progress
= optimize_split_arrays(ir
, linked
) || progress
;
1555 progress
= optimize_redundant_jumps(ir
) || progress
;
1557 loop_state
*ls
= analyze_loop_variables(ir
);
1558 if (ls
->loop_found
) {
1559 progress
= set_loop_controls(ir
, ls
) || progress
;
1560 progress
= unroll_loops(ir
, ls
, max_unroll_iterations
) || progress
;
1570 * To be called at GL teardown time, this frees compiler datastructures.
1572 * After calling this, any previously compiled shaders and shader
1573 * programs would be invalid. So this should happen at approximately
1577 _mesa_destroy_shader_compiler(void)
1579 _mesa_destroy_shader_compiler_caches();
1581 _mesa_glsl_release_types();
1585 * Releases compiler caches to trade off performance for memory.
1587 * Intended to be used with glReleaseShaderCompiler().
1590 _mesa_destroy_shader_compiler_caches(void)
1592 _mesa_glsl_release_functions();