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
)
58 : ctx(_ctx
), switch_state()
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
;
70 this->num_uniform_blocks
= 0;
71 this->uniform_block_array_size
= 0;
72 this->uniform_blocks
= NULL
;
74 this->info_log
= ralloc_strdup(mem_ctx
, "");
76 this->loop_nesting_ast
= NULL
;
78 this->struct_specifier_depth
= 0;
79 this->num_builtins_to_link
= 0;
81 /* Set default language version and extensions */
82 this->language_version
= ctx
->Const
.ForceGLSLVersion
?
83 ctx
->Const
.ForceGLSLVersion
: 110;
84 this->es_shader
= false;
85 this->ARB_texture_rectangle_enable
= true;
87 /* OpenGL ES 2.0 has different defaults from desktop GL. */
88 if (ctx
->API
== API_OPENGLES2
) {
89 this->language_version
= 100;
90 this->es_shader
= true;
91 this->ARB_texture_rectangle_enable
= false;
94 this->extensions
= &ctx
->Extensions
;
96 this->Const
.MaxLights
= ctx
->Const
.MaxLights
;
97 this->Const
.MaxClipPlanes
= ctx
->Const
.MaxClipPlanes
;
98 this->Const
.MaxTextureUnits
= ctx
->Const
.MaxTextureUnits
;
99 this->Const
.MaxTextureCoords
= ctx
->Const
.MaxTextureCoordUnits
;
100 this->Const
.MaxVertexAttribs
= ctx
->Const
.VertexProgram
.MaxAttribs
;
101 this->Const
.MaxVertexUniformComponents
= ctx
->Const
.VertexProgram
.MaxUniformComponents
;
102 this->Const
.MaxVaryingFloats
= ctx
->Const
.MaxVarying
* 4;
103 this->Const
.MaxVertexTextureImageUnits
= ctx
->Const
.VertexProgram
.MaxTextureImageUnits
;
104 this->Const
.MaxCombinedTextureImageUnits
= ctx
->Const
.MaxCombinedTextureImageUnits
;
105 this->Const
.MaxTextureImageUnits
= ctx
->Const
.FragmentProgram
.MaxTextureImageUnits
;
106 this->Const
.MaxFragmentUniformComponents
= ctx
->Const
.FragmentProgram
.MaxUniformComponents
;
107 this->Const
.MinProgramTexelOffset
= ctx
->Const
.MinProgramTexelOffset
;
108 this->Const
.MaxProgramTexelOffset
= ctx
->Const
.MaxProgramTexelOffset
;
110 this->Const
.MaxDrawBuffers
= ctx
->Const
.MaxDrawBuffers
;
112 this->current_function
= NULL
;
113 this->toplevel_ir
= NULL
;
114 this->found_return
= false;
115 this->all_invariant
= false;
116 this->user_structures
= NULL
;
117 this->num_user_structures
= 0;
119 /* Populate the list of supported GLSL versions */
120 /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
121 * the OpenGL 3.2 Core context is supported, this logic will need
122 * change. Older versions of GLSL are no longer supported
123 * outside the compatibility contexts of 3.x.
125 this->num_supported_versions
= 0;
126 if (_mesa_is_desktop_gl(ctx
)) {
127 for (unsigned i
= 0; i
< ARRAY_SIZE(known_desktop_glsl_versions
); i
++) {
128 if (known_desktop_glsl_versions
[i
] <= ctx
->Const
.GLSLVersion
) {
129 this->supported_versions
[this->num_supported_versions
].ver
130 = known_desktop_glsl_versions
[i
];
131 this->supported_versions
[this->num_supported_versions
].es
= false;
132 this->num_supported_versions
++;
136 if (ctx
->API
== API_OPENGLES2
|| ctx
->Extensions
.ARB_ES2_compatibility
) {
137 this->supported_versions
[this->num_supported_versions
].ver
= 100;
138 this->supported_versions
[this->num_supported_versions
].es
= true;
139 this->num_supported_versions
++;
141 if (_mesa_is_gles3(ctx
) || ctx
->Extensions
.ARB_ES3_compatibility
) {
142 this->supported_versions
[this->num_supported_versions
].ver
= 300;
143 this->supported_versions
[this->num_supported_versions
].es
= true;
144 this->num_supported_versions
++;
146 assert(this->num_supported_versions
147 <= ARRAY_SIZE(this->supported_versions
));
149 /* Create a string for use in error messages to tell the user which GLSL
150 * versions are supported.
152 char *supported
= ralloc_strdup(this, "");
153 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
154 unsigned ver
= this->supported_versions
[i
].ver
;
155 const char *const prefix
= (i
== 0)
157 : ((i
== this->num_supported_versions
- 1) ? ", and " : ", ");
158 const char *const suffix
= (this->supported_versions
[i
].es
) ? " ES" : "";
160 ralloc_asprintf_append(& supported
, "%s%u.%02u%s",
162 ver
/ 100, ver
% 100,
166 this->supported_version_string
= supported
;
168 if (ctx
->Const
.ForceGLSLExtensionsWarn
)
169 _mesa_glsl_process_extension("all", NULL
, "warn", NULL
, this);
171 this->default_uniform_qualifier
= new(this) ast_type_qualifier();
172 this->default_uniform_qualifier
->flags
.q
.shared
= 1;
173 this->default_uniform_qualifier
->flags
.q
.column_major
= 1;
175 this->gs_input_prim_type_specified
= false;
176 this->gs_input_prim_type
= GL_POINTS
;
177 this->gs_input_size
= 0;
178 this->out_qualifier
= new(this) ast_type_qualifier();
182 * Determine whether the current GLSL version is sufficiently high to support
183 * a certain feature, and generate an error message if it isn't.
185 * \param required_glsl_version and \c required_glsl_es_version are
186 * interpreted as they are in _mesa_glsl_parse_state::is_version().
188 * \param locp is the parser location where the error should be reported.
190 * \param fmt (and additional arguments) constitute a printf-style error
191 * message to report if the version check fails. Information about the
192 * current and required GLSL versions will be appended. So, for example, if
193 * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
194 * "foo unsupported") is called, the error message will be "foo unsupported in
195 * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
198 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version
,
199 unsigned required_glsl_es_version
,
200 YYLTYPE
*locp
, const char *fmt
, ...)
202 if (this->is_version(required_glsl_version
, required_glsl_es_version
))
207 char *problem
= ralloc_vasprintf(this, fmt
, args
);
209 const char *glsl_version_string
210 = glsl_compute_version_string(this, false, required_glsl_version
);
211 const char *glsl_es_version_string
212 = glsl_compute_version_string(this, true, required_glsl_es_version
);
213 const char *requirement_string
= "";
214 if (required_glsl_version
&& required_glsl_es_version
) {
215 requirement_string
= ralloc_asprintf(this, " (%s or %s required)",
217 glsl_es_version_string
);
218 } else if (required_glsl_version
) {
219 requirement_string
= ralloc_asprintf(this, " (%s required)",
220 glsl_version_string
);
221 } else if (required_glsl_es_version
) {
222 requirement_string
= ralloc_asprintf(this, " (%s required)",
223 glsl_es_version_string
);
225 _mesa_glsl_error(locp
, this, "%s in %s%s",
226 problem
, this->get_version_string(),
233 * Process a GLSL #version directive.
235 * \param version is the integer that follows the #version token.
237 * \param ident is a string identifier that follows the integer, if any is
238 * present. Otherwise NULL.
241 _mesa_glsl_parse_state::process_version_directive(YYLTYPE
*locp
, int version
,
244 bool es_token_present
= false;
246 if (strcmp(ident
, "es") == 0) {
247 es_token_present
= true;
248 } else if (version
>= 150) {
249 if (strcmp(ident
, "core") == 0) {
250 /* Accept the token. There's no need to record that this is
251 * a core profile shader since that's the only profile we support.
253 } else if (strcmp(ident
, "compatibility") == 0) {
254 _mesa_glsl_error(locp
, this,
255 "the compatibility profile is not supported");
257 _mesa_glsl_error(locp
, this,
258 "\"%s\" is not a valid shading language profile; "
259 "if present, it must be \"core\"", ident
);
262 _mesa_glsl_error(locp
, this,
263 "illegal text following version number");
267 this->es_shader
= es_token_present
;
268 if (version
== 100) {
269 if (es_token_present
) {
270 _mesa_glsl_error(locp
, this,
271 "GLSL 1.00 ES should be selected using "
274 this->es_shader
= true;
278 this->language_version
= version
;
280 bool supported
= false;
281 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
282 if (this->supported_versions
[i
].ver
== (unsigned) version
283 && this->supported_versions
[i
].es
== this->es_shader
) {
290 _mesa_glsl_error(locp
, this, "%s is not supported. "
291 "Supported versions are: %s",
292 this->get_version_string(),
293 this->supported_version_string
);
295 /* On exit, the language_version must be set to a valid value.
296 * Later calls to _mesa_glsl_initialize_types will misbehave if
297 * the version is invalid.
299 switch (this->ctx
->API
) {
300 case API_OPENGL_COMPAT
:
301 case API_OPENGL_CORE
:
302 this->language_version
= this->ctx
->Const
.GLSLVersion
;
306 assert(!"Should not get here.");
310 this->language_version
= 100;
319 * The most common use of _mesa_glsl_shader_target_name(), which is
320 * shared with C code in Mesa core to translate a GLenum to a short
321 * shader stage name in debug printouts.
323 * It recognizes the PROGRAM variants of the names so it can be used
324 * with a struct gl_program->Target, not just a struct
328 _mesa_glsl_shader_target_name(GLenum type
)
331 case GL_VERTEX_SHADER
:
332 case GL_VERTEX_PROGRAM_ARB
:
334 case GL_FRAGMENT_SHADER
:
335 case GL_FRAGMENT_PROGRAM_ARB
:
337 case GL_GEOMETRY_SHADER
:
340 assert(!"Should not get here.");
348 * Overloaded C++ variant usable within the compiler for translating
349 * our internal enum into short stage names.
352 _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target
)
355 case vertex_shader
: return "vertex";
356 case fragment_shader
: return "fragment";
357 case geometry_shader
: return "geometry";
360 assert(!"Should not get here.");
364 /* This helper function will append the given message to the shader's
365 info log and report it via GL_ARB_debug_output. Per that extension,
366 'type' is one of the enum values classifying the message, and
367 'id' is the implementation-defined ID of the given message. */
369 _mesa_glsl_msg(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
370 GLenum type
, const char *fmt
, va_list ap
)
372 bool error
= (type
== MESA_DEBUG_TYPE_ERROR
);
375 assert(state
->info_log
!= NULL
);
377 /* Get the offset that the new message will be written to. */
378 int msg_offset
= strlen(state
->info_log
);
380 ralloc_asprintf_append(&state
->info_log
, "%u:%u(%u): %s: ",
384 error
? "error" : "warning");
385 ralloc_vasprintf_append(&state
->info_log
, fmt
, ap
);
387 const char *const msg
= &state
->info_log
[msg_offset
];
388 struct gl_context
*ctx
= state
->ctx
;
390 /* Report the error via GL_ARB_debug_output. */
391 _mesa_shader_debug(ctx
, type
, &msg_id
, msg
, strlen(msg
));
393 ralloc_strcat(&state
->info_log
, "\n");
397 _mesa_glsl_error(YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
398 const char *fmt
, ...)
405 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_ERROR
, fmt
, ap
);
411 _mesa_glsl_warning(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
412 const char *fmt
, ...)
417 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_OTHER
, fmt
, ap
);
423 * Enum representing the possible behaviors that can be specified in
424 * an #extension directive.
434 * Element type for _mesa_glsl_supported_extensions
436 struct _mesa_glsl_extension
{
438 * Name of the extension when referred to in a GLSL extension
443 /** True if this extension is available to desktop GL shaders */
446 /** True if this extension is available to GLES shaders */
450 * Flag in the gl_extensions struct indicating whether this
451 * extension is supported by the driver, or
452 * &gl_extensions::dummy_true if supported by all drivers.
454 * Note: the type (GLboolean gl_extensions::*) is a "pointer to
455 * member" type, the type-safe alternative to the "offsetof" macro.
458 * - foo bar::* p declares p to be an "offset" to a field of type
459 * foo that exists within struct bar
460 * - &bar::baz computes the "offset" of field baz within struct bar
461 * - x.*p accesses the field of x that exists at "offset" p
462 * - x->*p is equivalent to (*x).*p
464 const GLboolean
gl_extensions::* supported_flag
;
467 * Flag in the _mesa_glsl_parse_state struct that should be set
468 * when this extension is enabled.
470 * See note in _mesa_glsl_extension::supported_flag about "pointer
473 bool _mesa_glsl_parse_state::* enable_flag
;
476 * Flag in the _mesa_glsl_parse_state struct that should be set
477 * when the shader requests "warn" behavior for this extension.
479 * See note in _mesa_glsl_extension::supported_flag about "pointer
482 bool _mesa_glsl_parse_state::* warn_flag
;
485 bool compatible_with_state(const _mesa_glsl_parse_state
*state
) const;
486 void set_flags(_mesa_glsl_parse_state
*state
, ext_behavior behavior
) const;
489 #define EXT(NAME, GL, ES, SUPPORTED_FLAG) \
490 { "GL_" #NAME, GL, ES, &gl_extensions::SUPPORTED_FLAG, \
491 &_mesa_glsl_parse_state::NAME##_enable, \
492 &_mesa_glsl_parse_state::NAME##_warn }
495 * Table of extensions that can be enabled/disabled within a shader,
496 * and the conditions under which they are supported.
498 static const _mesa_glsl_extension _mesa_glsl_supported_extensions
[] = {
499 /* API availability */
500 /* name GL ES supported flag */
501 EXT(ARB_conservative_depth
, true, false, ARB_conservative_depth
),
502 EXT(ARB_draw_buffers
, true, false, dummy_true
),
503 EXT(ARB_draw_instanced
, true, false, ARB_draw_instanced
),
504 EXT(ARB_explicit_attrib_location
, true, false, ARB_explicit_attrib_location
),
505 EXT(ARB_fragment_coord_conventions
, true, false, ARB_fragment_coord_conventions
),
506 EXT(ARB_texture_rectangle
, true, false, dummy_true
),
507 EXT(EXT_texture_array
, true, false, EXT_texture_array
),
508 EXT(ARB_shader_texture_lod
, true, false, ARB_shader_texture_lod
),
509 EXT(ARB_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
510 EXT(AMD_conservative_depth
, true, false, ARB_conservative_depth
),
511 EXT(AMD_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
512 EXT(OES_texture_3D
, false, true, EXT_texture3D
),
513 EXT(OES_EGL_image_external
, false, true, OES_EGL_image_external
),
514 EXT(ARB_shader_bit_encoding
, true, false, ARB_shader_bit_encoding
),
515 EXT(ARB_uniform_buffer_object
, true, false, ARB_uniform_buffer_object
),
516 EXT(OES_standard_derivatives
, false, true, OES_standard_derivatives
),
517 EXT(ARB_texture_cube_map_array
, true, false, ARB_texture_cube_map_array
),
518 EXT(ARB_shading_language_packing
, true, false, ARB_shading_language_packing
),
519 EXT(ARB_shading_language_420pack
, true, false, ARB_shading_language_420pack
),
520 EXT(ARB_texture_multisample
, true, false, ARB_texture_multisample
),
521 EXT(ARB_texture_query_levels
, true, false, ARB_texture_query_levels
),
522 EXT(ARB_texture_query_lod
, true, false, ARB_texture_query_lod
),
523 EXT(ARB_gpu_shader5
, true, false, ARB_gpu_shader5
),
524 EXT(AMD_vertex_shader_layer
, true, false, AMD_vertex_shader_layer
),
525 EXT(EXT_shader_integer_mix
, true, true, EXT_shader_integer_mix
),
526 EXT(ARB_texture_gather
, true, false, ARB_texture_gather
),
533 * Determine whether a given extension is compatible with the target,
534 * API, and extension information in the current parser state.
536 bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state
*
539 /* Check that this extension matches whether we are compiling
540 * for desktop GL or GLES.
542 if (state
->es_shader
) {
543 if (!this->avail_in_ES
) return false;
545 if (!this->avail_in_GL
) return false;
548 /* Check that this extension is supported by the OpenGL
551 * Note: the ->* operator indexes into state->extensions by the
552 * offset this->supported_flag. See
553 * _mesa_glsl_extension::supported_flag for more info.
555 return state
->extensions
->*(this->supported_flag
);
559 * Set the appropriate flags in the parser state to establish the
560 * given behavior for this extension.
562 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state
*state
,
563 ext_behavior behavior
) const
565 /* Note: the ->* operator indexes into state by the
566 * offsets this->enable_flag and this->warn_flag. See
567 * _mesa_glsl_extension::supported_flag for more info.
569 state
->*(this->enable_flag
) = (behavior
!= extension_disable
);
570 state
->*(this->warn_flag
) = (behavior
== extension_warn
);
574 * Find an extension by name in _mesa_glsl_supported_extensions. If
575 * the name is not found, return NULL.
577 static const _mesa_glsl_extension
*find_extension(const char *name
)
579 for (unsigned i
= 0; i
< Elements(_mesa_glsl_supported_extensions
); ++i
) {
580 if (strcmp(name
, _mesa_glsl_supported_extensions
[i
].name
) == 0) {
581 return &_mesa_glsl_supported_extensions
[i
];
589 _mesa_glsl_process_extension(const char *name
, YYLTYPE
*name_locp
,
590 const char *behavior_string
, YYLTYPE
*behavior_locp
,
591 _mesa_glsl_parse_state
*state
)
593 ext_behavior behavior
;
594 if (strcmp(behavior_string
, "warn") == 0) {
595 behavior
= extension_warn
;
596 } else if (strcmp(behavior_string
, "require") == 0) {
597 behavior
= extension_require
;
598 } else if (strcmp(behavior_string
, "enable") == 0) {
599 behavior
= extension_enable
;
600 } else if (strcmp(behavior_string
, "disable") == 0) {
601 behavior
= extension_disable
;
603 _mesa_glsl_error(behavior_locp
, state
,
604 "unknown extension behavior `%s'",
609 if (strcmp(name
, "all") == 0) {
610 if ((behavior
== extension_enable
) || (behavior
== extension_require
)) {
611 _mesa_glsl_error(name_locp
, state
, "cannot %s all extensions",
612 (behavior
== extension_enable
)
613 ? "enable" : "require");
617 i
< Elements(_mesa_glsl_supported_extensions
); ++i
) {
618 const _mesa_glsl_extension
*extension
619 = &_mesa_glsl_supported_extensions
[i
];
620 if (extension
->compatible_with_state(state
)) {
621 _mesa_glsl_supported_extensions
[i
].set_flags(state
, behavior
);
626 const _mesa_glsl_extension
*extension
= find_extension(name
);
627 if (extension
&& extension
->compatible_with_state(state
)) {
628 extension
->set_flags(state
, behavior
);
630 static const char *const fmt
= "extension `%s' unsupported in %s shader";
632 if (behavior
== extension_require
) {
633 _mesa_glsl_error(name_locp
, state
, fmt
,
634 name
, _mesa_glsl_shader_target_name(state
->target
));
637 _mesa_glsl_warning(name_locp
, state
, fmt
,
638 name
, _mesa_glsl_shader_target_name(state
->target
));
648 * Returns the name of the type of a column of a matrix. E.g.,
654 _mesa_ast_get_matrix_column_type_name(const char *matrix_type_name
)
656 static const char *vec_name
[] = { "vec2", "vec3", "vec4" };
658 /* The number of elements in a row of a matrix is specified by the last
659 * character of the matrix type name.
661 long rows
= strtol(matrix_type_name
+ strlen(matrix_type_name
) - 1,
663 return vec_name
[rows
- 2];
667 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
668 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
669 * (process_array_constructor, et al) sufficient information to do type
672 * Operates on assignments involving an aggregate initializer. E.g.,
674 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
676 * or more ridiculously,
689 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
690 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
695 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
696 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
702 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
703 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
709 * This pass is necessary because the right-hand side of <type> e = { ... }
710 * doesn't contain sufficient information to determine if the types match.
713 _mesa_ast_set_aggregate_type(const ast_type_specifier
*type
,
714 ast_expression
*expr
,
715 _mesa_glsl_parse_state
*state
)
718 ast_aggregate_initializer
*ai
= (ast_aggregate_initializer
*)expr
;
719 ai
->constructor_type
= (ast_type_specifier
*)type
;
721 bool is_declaration
= ai
->constructor_type
->structure
!= NULL
;
722 if (!is_declaration
) {
723 /* Look up <type> name in the symbol table to see if it's a struct. */
724 const ast_type_specifier
*struct_type
=
725 state
->symbols
->get_type_ast(type
->type_name
);
726 ai
->constructor_type
->structure
=
727 struct_type
? new(ctx
) ast_struct_specifier(*struct_type
->structure
)
731 /* If the aggregate is an array, recursively set its elements' types. */
732 if (type
->is_array
) {
733 /* We want to set the element type which is not an array itself, so make
734 * a copy of the array type and set its is_array field to false.
736 * E.g., if <type> if struct S[2] we want to set each element's type to
739 * FINISHME: Update when ARB_array_of_arrays is supported.
741 const ast_type_specifier
*non_array_type
=
742 new(ctx
) ast_type_specifier(type
, false, NULL
);
744 for (exec_node
*expr_node
= ai
->expressions
.head
;
745 !expr_node
->is_tail_sentinel();
746 expr_node
= expr_node
->next
) {
747 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
750 if (expr
->oper
== ast_aggregate
)
751 _mesa_ast_set_aggregate_type(non_array_type
, expr
, state
);
754 /* If the aggregate is a struct, recursively set its fields' types. */
755 } else if (ai
->constructor_type
->structure
) {
756 ai
->constructor_type
->structure
->is_declaration
= is_declaration
;
757 exec_node
*expr_node
= ai
->expressions
.head
;
759 /* Iterate through the struct's fields' declarations. E.g., iterate from
760 * "float a, b" to "int c" in the struct below.
767 for (exec_node
*decl_list_node
=
768 ai
->constructor_type
->structure
->declarations
.head
;
769 !decl_list_node
->is_tail_sentinel();
770 decl_list_node
= decl_list_node
->next
) {
771 ast_declarator_list
*decl_list
= exec_node_data(ast_declarator_list
,
772 decl_list_node
, link
);
774 for (exec_node
*decl_node
= decl_list
->declarations
.head
;
775 !decl_node
->is_tail_sentinel() && !expr_node
->is_tail_sentinel();
776 decl_node
= decl_node
->next
, expr_node
= expr_node
->next
) {
777 ast_declaration
*decl
= exec_node_data(ast_declaration
, decl_node
,
779 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
782 bool is_array
= decl_list
->type
->specifier
->is_array
;
783 ast_expression
*array_size
= decl_list
->type
->specifier
->array_size
;
785 /* Recognize variable declarations with the bracketed size attached
786 * to the type rather than the variable name as arrays. E.g.,
791 * are both arrays, but <a>'s array_size is decl->array_size, while
792 * <b>'s array_size is decl_list->type->specifier->array_size.
795 /* FINISHME: Update when ARB_array_of_arrays is supported. */
796 is_array
= decl
->is_array
;
797 array_size
= decl
->array_size
;
800 /* Declaration shadows the <type> parameter. */
801 ast_type_specifier
*type
=
802 new(ctx
) ast_type_specifier(decl_list
->type
->specifier
,
803 is_array
, array_size
);
805 if (expr
->oper
== ast_aggregate
)
806 _mesa_ast_set_aggregate_type(type
, expr
, state
);
810 /* If the aggregate is a matrix, set its columns' types. */
812 const glsl_type
*const constructor_type
=
813 ai
->constructor_type
->glsl_type(&name
, state
);
815 if (constructor_type
->is_matrix()) {
816 for (exec_node
*expr_node
= ai
->expressions
.head
;
817 !expr_node
->is_tail_sentinel();
818 expr_node
= expr_node
->next
) {
819 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
822 /* Declaration shadows the <type> parameter. */
823 ast_type_specifier
*type
= new(ctx
)
824 ast_type_specifier(_mesa_ast_get_matrix_column_type_name(name
));
826 if (expr
->oper
== ast_aggregate
)
827 _mesa_ast_set_aggregate_type(type
, expr
, state
);
835 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier
*q
)
837 if (q
->flags
.q
.constant
)
840 if (q
->flags
.q
.invariant
)
841 printf("invariant ");
843 if (q
->flags
.q
.attribute
)
844 printf("attribute ");
846 if (q
->flags
.q
.varying
)
849 if (q
->flags
.q
.in
&& q
->flags
.q
.out
)
859 if (q
->flags
.q
.centroid
)
861 if (q
->flags
.q
.uniform
)
863 if (q
->flags
.q
.smooth
)
867 if (q
->flags
.q
.noperspective
)
868 printf("noperspective ");
873 ast_node::print(void) const
875 printf("unhandled node ");
879 ast_node::ast_node(void)
881 this->location
.source
= 0;
882 this->location
.line
= 0;
883 this->location
.column
= 0;
888 ast_opt_array_size_print(bool is_array
, const ast_expression
*array_size
)
902 ast_compound_statement::print(void) const
906 foreach_list_const(n
, &this->statements
) {
907 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
915 ast_compound_statement::ast_compound_statement(int new_scope
,
916 ast_node
*statements
)
918 this->new_scope
= new_scope
;
920 if (statements
!= NULL
) {
921 this->statements
.push_degenerate_list_at_head(&statements
->link
);
927 ast_expression::print(void) const
941 subexpressions
[0]->print();
942 printf("%s ", operator_string(oper
));
943 subexpressions
[1]->print();
946 case ast_field_selection
:
947 subexpressions
[0]->print();
948 printf(". %s ", primary_expression
.identifier
);
957 printf("%s ", operator_string(oper
));
958 subexpressions
[0]->print();
963 subexpressions
[0]->print();
964 printf("%s ", operator_string(oper
));
967 case ast_conditional
:
968 subexpressions
[0]->print();
970 subexpressions
[1]->print();
972 subexpressions
[2]->print();
975 case ast_array_index
:
976 subexpressions
[0]->print();
978 subexpressions
[1]->print();
982 case ast_function_call
: {
983 subexpressions
[0]->print();
986 foreach_list_const (n
, &this->expressions
) {
987 if (n
!= this->expressions
.get_head())
990 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
999 printf("%s ", primary_expression
.identifier
);
1002 case ast_int_constant
:
1003 printf("%d ", primary_expression
.int_constant
);
1006 case ast_uint_constant
:
1007 printf("%u ", primary_expression
.uint_constant
);
1010 case ast_float_constant
:
1011 printf("%f ", primary_expression
.float_constant
);
1014 case ast_bool_constant
:
1016 primary_expression
.bool_constant
1017 ? "true" : "false");
1020 case ast_sequence
: {
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
);
1033 case ast_aggregate
: {
1035 foreach_list_const(n
, & this->expressions
) {
1036 if (n
!= this->expressions
.get_head())
1039 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1052 ast_expression::ast_expression(int oper
,
1053 ast_expression
*ex0
,
1054 ast_expression
*ex1
,
1055 ast_expression
*ex2
) :
1056 primary_expression()
1058 this->oper
= ast_operators(oper
);
1059 this->subexpressions
[0] = ex0
;
1060 this->subexpressions
[1] = ex1
;
1061 this->subexpressions
[2] = ex2
;
1062 this->non_lvalue_description
= NULL
;
1067 ast_expression_statement::print(void) const
1070 expression
->print();
1076 ast_expression_statement::ast_expression_statement(ast_expression
*ex
) :
1084 ast_function::print(void) const
1086 return_type
->print();
1087 printf(" %s (", identifier
);
1089 foreach_list_const(n
, & this->parameters
) {
1090 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1098 ast_function::ast_function(void)
1099 : return_type(NULL
), identifier(NULL
), is_definition(false),
1107 ast_fully_specified_type::print(void) const
1109 _mesa_ast_type_qualifier_print(& qualifier
);
1115 ast_parameter_declarator::print(void) const
1119 printf("%s ", identifier
);
1120 ast_opt_array_size_print(is_array
, array_size
);
1125 ast_function_definition::print(void) const
1133 ast_declaration::print(void) const
1135 printf("%s ", identifier
);
1136 ast_opt_array_size_print(is_array
, array_size
);
1140 initializer
->print();
1145 ast_declaration::ast_declaration(const char *identifier
, bool is_array
,
1146 ast_expression
*array_size
,
1147 ast_expression
*initializer
)
1149 this->identifier
= identifier
;
1150 this->is_array
= is_array
;
1151 this->array_size
= array_size
;
1152 this->initializer
= initializer
;
1157 ast_declarator_list::print(void) const
1159 assert(type
|| invariant
);
1164 printf("invariant ");
1166 foreach_list_const (ptr
, & this->declarations
) {
1167 if (ptr
!= this->declarations
.get_head())
1170 ast_node
*ast
= exec_node_data(ast_node
, ptr
, link
);
1178 ast_declarator_list::ast_declarator_list(ast_fully_specified_type
*type
)
1181 this->invariant
= false;
1185 ast_jump_statement::print(void) const
1189 printf("continue; ");
1196 if (opt_return_value
)
1197 opt_return_value
->print();
1202 printf("discard; ");
1208 ast_jump_statement::ast_jump_statement(int mode
, ast_expression
*return_value
)
1209 : opt_return_value(NULL
)
1211 this->mode
= ast_jump_modes(mode
);
1213 if (mode
== ast_return
)
1214 opt_return_value
= return_value
;
1219 ast_selection_statement::print(void) const
1225 then_statement
->print();
1227 if (else_statement
) {
1229 else_statement
->print();
1235 ast_selection_statement::ast_selection_statement(ast_expression
*condition
,
1236 ast_node
*then_statement
,
1237 ast_node
*else_statement
)
1239 this->condition
= condition
;
1240 this->then_statement
= then_statement
;
1241 this->else_statement
= else_statement
;
1246 ast_switch_statement::print(void) const
1248 printf("switch ( ");
1249 test_expression
->print();
1256 ast_switch_statement::ast_switch_statement(ast_expression
*test_expression
,
1259 this->test_expression
= test_expression
;
1265 ast_switch_body::print(void) const
1268 if (stmts
!= NULL
) {
1275 ast_switch_body::ast_switch_body(ast_case_statement_list
*stmts
)
1277 this->stmts
= stmts
;
1281 void ast_case_label::print(void) const
1283 if (test_value
!= NULL
) {
1285 test_value
->print();
1288 printf("default: ");
1293 ast_case_label::ast_case_label(ast_expression
*test_value
)
1295 this->test_value
= test_value
;
1299 void ast_case_label_list::print(void) const
1301 foreach_list_const(n
, & this->labels
) {
1302 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1309 ast_case_label_list::ast_case_label_list(void)
1314 void ast_case_statement::print(void) const
1317 foreach_list_const(n
, & this->stmts
) {
1318 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1325 ast_case_statement::ast_case_statement(ast_case_label_list
*labels
)
1327 this->labels
= labels
;
1331 void ast_case_statement_list::print(void) const
1333 foreach_list_const(n
, & this->cases
) {
1334 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1340 ast_case_statement_list::ast_case_statement_list(void)
1346 ast_iteration_statement::print(void) const
1352 init_statement
->print();
1359 if (rest_expression
)
1360 rest_expression
->print();
1386 ast_iteration_statement::ast_iteration_statement(int mode
,
1388 ast_node
*condition
,
1389 ast_expression
*rest_expression
,
1392 this->mode
= ast_iteration_modes(mode
);
1393 this->init_statement
= init
;
1394 this->condition
= condition
;
1395 this->rest_expression
= rest_expression
;
1401 ast_struct_specifier::print(void) const
1403 printf("struct %s { ", name
);
1404 foreach_list_const(n
, &this->declarations
) {
1405 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1412 ast_struct_specifier::ast_struct_specifier(const char *identifier
,
1413 ast_declarator_list
*declarator_list
)
1415 if (identifier
== NULL
) {
1416 static unsigned anon_count
= 1;
1417 identifier
= ralloc_asprintf(this, "#anon_struct_%04x", anon_count
);
1421 this->declarations
.push_degenerate_list_at_head(&declarator_list
->link
);
1422 is_declaration
= true;
1426 set_shader_inout_layout(struct gl_shader
*shader
,
1427 struct _mesa_glsl_parse_state
*state
)
1429 if (shader
->Type
!= GL_GEOMETRY_SHADER
) {
1430 /* Should have been prevented by the parser. */
1431 assert(!state
->gs_input_prim_type_specified
);
1432 assert(!state
->out_qualifier
->flags
.i
);
1436 shader
->Geom
.VerticesOut
= 0;
1437 if (state
->out_qualifier
->flags
.q
.max_vertices
)
1438 shader
->Geom
.VerticesOut
= state
->out_qualifier
->max_vertices
;
1440 if (state
->gs_input_prim_type_specified
) {
1441 shader
->Geom
.InputType
= state
->gs_input_prim_type
;
1443 shader
->Geom
.InputType
= PRIM_UNKNOWN
;
1446 if (state
->out_qualifier
->flags
.q
.prim_type
) {
1447 shader
->Geom
.OutputType
= state
->out_qualifier
->prim_type
;
1449 shader
->Geom
.OutputType
= PRIM_UNKNOWN
;
1456 _mesa_glsl_compile_shader(struct gl_context
*ctx
, struct gl_shader
*shader
,
1457 bool dump_ast
, bool dump_hir
)
1459 struct _mesa_glsl_parse_state
*state
=
1460 new(shader
) _mesa_glsl_parse_state(ctx
, shader
->Type
, shader
);
1461 const char *source
= shader
->Source
;
1463 state
->error
= glcpp_preprocess(state
, &source
, &state
->info_log
,
1464 &ctx
->Extensions
, ctx
);
1466 if (!state
->error
) {
1467 _mesa_glsl_lexer_ctor(state
, source
);
1468 _mesa_glsl_parse(state
);
1469 _mesa_glsl_lexer_dtor(state
);
1473 foreach_list_const(n
, &state
->translation_unit
) {
1474 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1480 ralloc_free(shader
->ir
);
1481 shader
->ir
= new(shader
) exec_list
;
1482 if (!state
->error
&& !state
->translation_unit
.is_empty())
1483 _mesa_ast_to_hir(shader
->ir
, state
);
1485 if (!state
->error
) {
1486 validate_ir_tree(shader
->ir
);
1488 /* Print out the unoptimized IR. */
1490 _mesa_print_ir(shader
->ir
, state
);
1495 if (!state
->error
&& !shader
->ir
->is_empty()) {
1496 struct gl_shader_compiler_options
*options
=
1497 &ctx
->ShaderCompilerOptions
[_mesa_shader_type_to_index(shader
->Type
)];
1499 /* Do some optimization at compile time to reduce shader IR size
1500 * and reduce later work if the same shader is linked multiple times
1502 while (do_common_optimization(shader
->ir
, false, false, 32, options
))
1505 validate_ir_tree(shader
->ir
);
1508 if (shader
->InfoLog
)
1509 ralloc_free(shader
->InfoLog
);
1511 shader
->symbols
= state
->symbols
;
1512 shader
->CompileStatus
= !state
->error
;
1513 shader
->InfoLog
= state
->info_log
;
1514 shader
->Version
= state
->language_version
;
1515 shader
->InfoLog
= state
->info_log
;
1516 shader
->IsES
= state
->es_shader
;
1518 memcpy(shader
->builtins_to_link
, state
->builtins_to_link
,
1519 sizeof(shader
->builtins_to_link
[0]) * state
->num_builtins_to_link
);
1520 shader
->num_builtins_to_link
= state
->num_builtins_to_link
;
1522 if (shader
->UniformBlocks
)
1523 ralloc_free(shader
->UniformBlocks
);
1524 shader
->NumUniformBlocks
= state
->num_uniform_blocks
;
1525 shader
->UniformBlocks
= state
->uniform_blocks
;
1526 ralloc_steal(shader
, shader
->UniformBlocks
);
1529 set_shader_inout_layout(shader
, state
);
1531 /* Retain any live IR, but trash the rest. */
1532 reparent_ir(shader
->ir
, shader
->ir
);
1539 * Do the set of common optimizations passes
1541 * \param ir List of instructions to be optimized
1542 * \param linked Is the shader linked? This enables
1543 * optimizations passes that remove code at
1544 * global scope and could cause linking to
1546 * \param uniform_locations_assigned Have locations already been assigned for
1547 * uniforms? This prevents the declarations
1548 * of unused uniforms from being removed.
1549 * The setting of this flag only matters if
1550 * \c linked is \c true.
1551 * \param max_unroll_iterations Maximum number of loop iterations to be
1552 * unrolled. Setting to 0 disables loop
1554 * \param options The driver's preferred shader options.
1557 do_common_optimization(exec_list
*ir
, bool linked
,
1558 bool uniform_locations_assigned
,
1559 unsigned max_unroll_iterations
,
1560 const struct gl_shader_compiler_options
*options
)
1562 GLboolean progress
= GL_FALSE
;
1564 progress
= lower_instructions(ir
, SUB_TO_ADD_NEG
) || progress
;
1567 progress
= do_function_inlining(ir
) || progress
;
1568 progress
= do_dead_functions(ir
) || progress
;
1569 progress
= do_structure_splitting(ir
) || progress
;
1571 progress
= do_if_simplification(ir
) || progress
;
1572 progress
= opt_flatten_nested_if_blocks(ir
) || progress
;
1573 progress
= do_copy_propagation(ir
) || progress
;
1574 progress
= do_copy_propagation_elements(ir
) || progress
;
1576 if (options
->PreferDP4
&& !linked
)
1577 progress
= opt_flip_matrices(ir
) || progress
;
1580 progress
= do_dead_code(ir
, uniform_locations_assigned
) || progress
;
1582 progress
= do_dead_code_unlinked(ir
) || progress
;
1583 progress
= do_dead_code_local(ir
) || progress
;
1584 progress
= do_tree_grafting(ir
) || progress
;
1585 progress
= do_constant_propagation(ir
) || progress
;
1587 progress
= do_constant_variable(ir
) || progress
;
1589 progress
= do_constant_variable_unlinked(ir
) || progress
;
1590 progress
= do_constant_folding(ir
) || progress
;
1591 progress
= do_algebraic(ir
) || progress
;
1592 progress
= do_lower_jumps(ir
) || progress
;
1593 progress
= do_vec_index_to_swizzle(ir
) || progress
;
1594 progress
= lower_vector_insert(ir
, false) || progress
;
1595 progress
= do_swizzle_swizzle(ir
) || progress
;
1596 progress
= do_noop_swizzle(ir
) || progress
;
1598 progress
= optimize_split_arrays(ir
, linked
) || progress
;
1599 progress
= optimize_redundant_jumps(ir
) || progress
;
1601 loop_state
*ls
= analyze_loop_variables(ir
);
1602 if (ls
->loop_found
) {
1603 progress
= set_loop_controls(ir
, ls
) || progress
;
1604 progress
= unroll_loops(ir
, ls
, max_unroll_iterations
) || progress
;
1614 * To be called at GL teardown time, this frees compiler datastructures.
1616 * After calling this, any previously compiled shaders and shader
1617 * programs would be invalid. So this should happen at approximately
1621 _mesa_destroy_shader_compiler(void)
1623 _mesa_destroy_shader_compiler_caches();
1625 _mesa_glsl_release_types();
1629 * Releases compiler caches to trade off performance for memory.
1631 * Intended to be used with glReleaseShaderCompiler().
1634 _mesa_destroy_shader_compiler_caches(void)
1636 _mesa_glsl_release_builtin_functions();