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->struct_specifier_depth
= 0;
75 this->num_builtins_to_link
= 0;
77 /* Set default language version and extensions */
78 this->language_version
= ctx
->Const
.ForceGLSLVersion
?
79 ctx
->Const
.ForceGLSLVersion
: 110;
80 this->es_shader
= false;
81 this->ARB_texture_rectangle_enable
= true;
83 /* OpenGL ES 2.0 has different defaults from desktop GL. */
84 if (ctx
->API
== API_OPENGLES2
) {
85 this->language_version
= 100;
86 this->es_shader
= true;
87 this->ARB_texture_rectangle_enable
= false;
90 this->extensions
= &ctx
->Extensions
;
92 this->Const
.MaxLights
= ctx
->Const
.MaxLights
;
93 this->Const
.MaxClipPlanes
= ctx
->Const
.MaxClipPlanes
;
94 this->Const
.MaxTextureUnits
= ctx
->Const
.MaxTextureUnits
;
95 this->Const
.MaxTextureCoords
= ctx
->Const
.MaxTextureCoordUnits
;
96 this->Const
.MaxVertexAttribs
= ctx
->Const
.VertexProgram
.MaxAttribs
;
97 this->Const
.MaxVertexUniformComponents
= ctx
->Const
.VertexProgram
.MaxUniformComponents
;
98 this->Const
.MaxVaryingFloats
= ctx
->Const
.MaxVarying
* 4;
99 this->Const
.MaxVertexTextureImageUnits
= ctx
->Const
.VertexProgram
.MaxTextureImageUnits
;
100 this->Const
.MaxCombinedTextureImageUnits
= ctx
->Const
.MaxCombinedTextureImageUnits
;
101 this->Const
.MaxTextureImageUnits
= ctx
->Const
.FragmentProgram
.MaxTextureImageUnits
;
102 this->Const
.MaxFragmentUniformComponents
= ctx
->Const
.FragmentProgram
.MaxUniformComponents
;
103 this->Const
.MinProgramTexelOffset
= ctx
->Const
.MinProgramTexelOffset
;
104 this->Const
.MaxProgramTexelOffset
= ctx
->Const
.MaxProgramTexelOffset
;
106 this->Const
.MaxDrawBuffers
= ctx
->Const
.MaxDrawBuffers
;
108 /* Populate the list of supported GLSL versions */
109 /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
110 * the OpenGL 3.2 Core context is supported, this logic will need
111 * change. Older versions of GLSL are no longer supported
112 * outside the compatibility contexts of 3.x.
114 this->num_supported_versions
= 0;
115 if (_mesa_is_desktop_gl(ctx
)) {
116 for (unsigned i
= 0; i
< ARRAY_SIZE(known_desktop_glsl_versions
); i
++) {
117 if (known_desktop_glsl_versions
[i
] <= ctx
->Const
.GLSLVersion
) {
118 this->supported_versions
[this->num_supported_versions
].ver
119 = known_desktop_glsl_versions
[i
];
120 this->supported_versions
[this->num_supported_versions
].es
= false;
121 this->num_supported_versions
++;
125 if (ctx
->API
== API_OPENGLES2
|| ctx
->Extensions
.ARB_ES2_compatibility
) {
126 this->supported_versions
[this->num_supported_versions
].ver
= 100;
127 this->supported_versions
[this->num_supported_versions
].es
= true;
128 this->num_supported_versions
++;
130 if (_mesa_is_gles3(ctx
) || ctx
->Extensions
.ARB_ES3_compatibility
) {
131 this->supported_versions
[this->num_supported_versions
].ver
= 300;
132 this->supported_versions
[this->num_supported_versions
].es
= true;
133 this->num_supported_versions
++;
135 assert(this->num_supported_versions
136 <= ARRAY_SIZE(this->supported_versions
));
138 /* Create a string for use in error messages to tell the user which GLSL
139 * versions are supported.
141 char *supported
= ralloc_strdup(this, "");
142 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
143 unsigned ver
= this->supported_versions
[i
].ver
;
144 const char *const prefix
= (i
== 0)
146 : ((i
== this->num_supported_versions
- 1) ? ", and " : ", ");
147 const char *const suffix
= (this->supported_versions
[i
].es
) ? " ES" : "";
149 ralloc_asprintf_append(& supported
, "%s%u.%02u%s",
151 ver
/ 100, ver
% 100,
155 this->supported_version_string
= supported
;
157 if (ctx
->Const
.ForceGLSLExtensionsWarn
)
158 _mesa_glsl_process_extension("all", NULL
, "warn", NULL
, this);
160 this->default_uniform_qualifier
= new(this) ast_type_qualifier();
161 this->default_uniform_qualifier
->flags
.q
.shared
= 1;
162 this->default_uniform_qualifier
->flags
.q
.column_major
= 1;
164 this->gs_input_prim_type_specified
= false;
165 this->gs_input_prim_type
= GL_POINTS
;
166 this->out_qualifier
= new(this) ast_type_qualifier();
170 * Determine whether the current GLSL version is sufficiently high to support
171 * a certain feature, and generate an error message if it isn't.
173 * \param required_glsl_version and \c required_glsl_es_version are
174 * interpreted as they are in _mesa_glsl_parse_state::is_version().
176 * \param locp is the parser location where the error should be reported.
178 * \param fmt (and additional arguments) constitute a printf-style error
179 * message to report if the version check fails. Information about the
180 * current and required GLSL versions will be appended. So, for example, if
181 * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
182 * "foo unsupported") is called, the error message will be "foo unsupported in
183 * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
186 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version
,
187 unsigned required_glsl_es_version
,
188 YYLTYPE
*locp
, const char *fmt
, ...)
190 if (this->is_version(required_glsl_version
, required_glsl_es_version
))
195 char *problem
= ralloc_vasprintf(this, fmt
, args
);
197 const char *glsl_version_string
198 = glsl_compute_version_string(this, false, required_glsl_version
);
199 const char *glsl_es_version_string
200 = glsl_compute_version_string(this, true, required_glsl_es_version
);
201 const char *requirement_string
= "";
202 if (required_glsl_version
&& required_glsl_es_version
) {
203 requirement_string
= ralloc_asprintf(this, " (%s or %s required)",
205 glsl_es_version_string
);
206 } else if (required_glsl_version
) {
207 requirement_string
= ralloc_asprintf(this, " (%s required)",
208 glsl_version_string
);
209 } else if (required_glsl_es_version
) {
210 requirement_string
= ralloc_asprintf(this, " (%s required)",
211 glsl_es_version_string
);
213 _mesa_glsl_error(locp
, this, "%s in %s%s",
214 problem
, this->get_version_string(),
221 * Process a GLSL #version directive.
223 * \param version is the integer that follows the #version token.
225 * \param ident is a string identifier that follows the integer, if any is
226 * present. Otherwise NULL.
229 _mesa_glsl_parse_state::process_version_directive(YYLTYPE
*locp
, int version
,
232 bool es_token_present
= false;
234 if (strcmp(ident
, "es") == 0) {
235 es_token_present
= true;
236 } else if (version
>= 150) {
237 if (strcmp(ident
, "core") == 0) {
238 /* Accept the token. There's no need to record that this is
239 * a core profile shader since that's the only profile we support.
241 } else if (strcmp(ident
, "compatibility") == 0) {
242 _mesa_glsl_error(locp
, this,
243 "the compatibility profile is not supported");
245 _mesa_glsl_error(locp
, this,
246 "\"%s\" is not a valid shading language profile; "
247 "if present, it must be \"core\"", ident
);
250 _mesa_glsl_error(locp
, this,
251 "illegal text following version number");
255 this->es_shader
= es_token_present
;
256 if (version
== 100) {
257 if (es_token_present
) {
258 _mesa_glsl_error(locp
, this,
259 "GLSL 1.00 ES should be selected using "
262 this->es_shader
= true;
266 this->language_version
= version
;
268 bool supported
= false;
269 for (unsigned i
= 0; i
< this->num_supported_versions
; i
++) {
270 if (this->supported_versions
[i
].ver
== (unsigned) version
271 && this->supported_versions
[i
].es
== this->es_shader
) {
278 _mesa_glsl_error(locp
, this, "%s is not supported. "
279 "Supported versions are: %s",
280 this->get_version_string(),
281 this->supported_version_string
);
283 /* On exit, the language_version must be set to a valid value.
284 * Later calls to _mesa_glsl_initialize_types will misbehave if
285 * the version is invalid.
287 switch (this->ctx
->API
) {
288 case API_OPENGL_COMPAT
:
289 case API_OPENGL_CORE
:
290 this->language_version
= this->ctx
->Const
.GLSLVersion
;
294 assert(!"Should not get here.");
298 this->language_version
= 100;
303 if (this->language_version
>= 140) {
304 this->ARB_uniform_buffer_object_enable
= true;
307 if (this->language_version
== 300 && this->es_shader
) {
308 this->ARB_explicit_attrib_location_enable
= true;
315 * The most common use of _mesa_glsl_shader_target_name(), which is
316 * shared with C code in Mesa core to translate a GLenum to a short
317 * shader stage name in debug printouts.
319 * It recognizes the PROGRAM variants of the names so it can be used
320 * with a struct gl_program->Target, not just a struct
324 _mesa_glsl_shader_target_name(GLenum type
)
327 case GL_VERTEX_SHADER
:
328 case GL_VERTEX_PROGRAM_ARB
:
330 case GL_FRAGMENT_SHADER
:
331 case GL_FRAGMENT_PROGRAM_ARB
:
333 case GL_GEOMETRY_SHADER
:
336 assert(!"Should not get here.");
344 * Overloaded C++ variant usable within the compiler for translating
345 * our internal enum into short stage names.
348 _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target
)
351 case vertex_shader
: return "vertex";
352 case fragment_shader
: return "fragment";
353 case geometry_shader
: return "geometry";
356 assert(!"Should not get here.");
360 /* This helper function will append the given message to the shader's
361 info log and report it via GL_ARB_debug_output. Per that extension,
362 'type' is one of the enum values classifying the message, and
363 'id' is the implementation-defined ID of the given message. */
365 _mesa_glsl_msg(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
366 GLenum type
, const char *fmt
, va_list ap
)
368 bool error
= (type
== MESA_DEBUG_TYPE_ERROR
);
371 assert(state
->info_log
!= NULL
);
373 /* Get the offset that the new message will be written to. */
374 int msg_offset
= strlen(state
->info_log
);
376 ralloc_asprintf_append(&state
->info_log
, "%u:%u(%u): %s: ",
380 error
? "error" : "warning");
381 ralloc_vasprintf_append(&state
->info_log
, fmt
, ap
);
383 const char *const msg
= &state
->info_log
[msg_offset
];
384 struct gl_context
*ctx
= state
->ctx
;
386 /* Report the error via GL_ARB_debug_output. */
387 _mesa_shader_debug(ctx
, type
, &msg_id
, msg
, strlen(msg
));
389 ralloc_strcat(&state
->info_log
, "\n");
393 _mesa_glsl_error(YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
394 const char *fmt
, ...)
401 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_ERROR
, fmt
, ap
);
407 _mesa_glsl_warning(const YYLTYPE
*locp
, _mesa_glsl_parse_state
*state
,
408 const char *fmt
, ...)
413 _mesa_glsl_msg(locp
, state
, MESA_DEBUG_TYPE_OTHER
, fmt
, ap
);
419 * Enum representing the possible behaviors that can be specified in
420 * an #extension directive.
430 * Element type for _mesa_glsl_supported_extensions
432 struct _mesa_glsl_extension
{
434 * Name of the extension when referred to in a GLSL extension
439 /** True if this extension is available to desktop GL shaders */
442 /** True if this extension is available to GLES shaders */
446 * Flag in the gl_extensions struct indicating whether this
447 * extension is supported by the driver, or
448 * &gl_extensions::dummy_true if supported by all drivers.
450 * Note: the type (GLboolean gl_extensions::*) is a "pointer to
451 * member" type, the type-safe alternative to the "offsetof" macro.
454 * - foo bar::* p declares p to be an "offset" to a field of type
455 * foo that exists within struct bar
456 * - &bar::baz computes the "offset" of field baz within struct bar
457 * - x.*p accesses the field of x that exists at "offset" p
458 * - x->*p is equivalent to (*x).*p
460 const GLboolean
gl_extensions::* supported_flag
;
463 * Flag in the _mesa_glsl_parse_state struct that should be set
464 * when this extension is enabled.
466 * See note in _mesa_glsl_extension::supported_flag about "pointer
469 bool _mesa_glsl_parse_state::* enable_flag
;
472 * Flag in the _mesa_glsl_parse_state struct that should be set
473 * when the shader requests "warn" behavior for this extension.
475 * See note in _mesa_glsl_extension::supported_flag about "pointer
478 bool _mesa_glsl_parse_state::* warn_flag
;
481 bool compatible_with_state(const _mesa_glsl_parse_state
*state
) const;
482 void set_flags(_mesa_glsl_parse_state
*state
, ext_behavior behavior
) const;
485 #define EXT(NAME, GL, ES, SUPPORTED_FLAG) \
486 { "GL_" #NAME, GL, ES, &gl_extensions::SUPPORTED_FLAG, \
487 &_mesa_glsl_parse_state::NAME##_enable, \
488 &_mesa_glsl_parse_state::NAME##_warn }
491 * Table of extensions that can be enabled/disabled within a shader,
492 * and the conditions under which they are supported.
494 static const _mesa_glsl_extension _mesa_glsl_supported_extensions
[] = {
495 /* API availability */
496 /* name GL ES supported flag */
497 EXT(ARB_conservative_depth
, true, false, ARB_conservative_depth
),
498 EXT(ARB_draw_buffers
, true, false, dummy_true
),
499 EXT(ARB_draw_instanced
, true, false, ARB_draw_instanced
),
500 EXT(ARB_explicit_attrib_location
, true, false, ARB_explicit_attrib_location
),
501 EXT(ARB_fragment_coord_conventions
, true, false, ARB_fragment_coord_conventions
),
502 EXT(ARB_texture_rectangle
, true, false, dummy_true
),
503 EXT(EXT_texture_array
, true, false, EXT_texture_array
),
504 EXT(ARB_shader_texture_lod
, true, false, ARB_shader_texture_lod
),
505 EXT(ARB_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
506 EXT(AMD_conservative_depth
, true, false, ARB_conservative_depth
),
507 EXT(AMD_shader_stencil_export
, true, false, ARB_shader_stencil_export
),
508 EXT(OES_texture_3D
, false, true, EXT_texture3D
),
509 EXT(OES_EGL_image_external
, false, true, OES_EGL_image_external
),
510 EXT(ARB_shader_bit_encoding
, true, false, ARB_shader_bit_encoding
),
511 EXT(ARB_uniform_buffer_object
, true, false, ARB_uniform_buffer_object
),
512 EXT(OES_standard_derivatives
, false, true, OES_standard_derivatives
),
513 EXT(ARB_texture_cube_map_array
, true, false, ARB_texture_cube_map_array
),
514 EXT(ARB_shading_language_packing
, true, false, ARB_shading_language_packing
),
515 EXT(ARB_shading_language_420pack
, true, false, ARB_shading_language_420pack
),
516 EXT(ARB_texture_multisample
, true, false, ARB_texture_multisample
),
517 EXT(ARB_texture_query_lod
, true, false, ARB_texture_query_lod
),
518 EXT(ARB_gpu_shader5
, true, false, ARB_gpu_shader5
),
519 EXT(AMD_vertex_shader_layer
, true, false, AMD_vertex_shader_layer
),
526 * Determine whether a given extension is compatible with the target,
527 * API, and extension information in the current parser state.
529 bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state
*
532 /* Check that this extension matches whether we are compiling
533 * for desktop GL or GLES.
535 if (state
->es_shader
) {
536 if (!this->avail_in_ES
) return false;
538 if (!this->avail_in_GL
) return false;
541 /* Check that this extension is supported by the OpenGL
544 * Note: the ->* operator indexes into state->extensions by the
545 * offset this->supported_flag. See
546 * _mesa_glsl_extension::supported_flag for more info.
548 return state
->extensions
->*(this->supported_flag
);
552 * Set the appropriate flags in the parser state to establish the
553 * given behavior for this extension.
555 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state
*state
,
556 ext_behavior behavior
) const
558 /* Note: the ->* operator indexes into state by the
559 * offsets this->enable_flag and this->warn_flag. See
560 * _mesa_glsl_extension::supported_flag for more info.
562 state
->*(this->enable_flag
) = (behavior
!= extension_disable
);
563 state
->*(this->warn_flag
) = (behavior
== extension_warn
);
567 * Find an extension by name in _mesa_glsl_supported_extensions. If
568 * the name is not found, return NULL.
570 static const _mesa_glsl_extension
*find_extension(const char *name
)
572 for (unsigned i
= 0; i
< Elements(_mesa_glsl_supported_extensions
); ++i
) {
573 if (strcmp(name
, _mesa_glsl_supported_extensions
[i
].name
) == 0) {
574 return &_mesa_glsl_supported_extensions
[i
];
582 _mesa_glsl_process_extension(const char *name
, YYLTYPE
*name_locp
,
583 const char *behavior_string
, YYLTYPE
*behavior_locp
,
584 _mesa_glsl_parse_state
*state
)
586 ext_behavior behavior
;
587 if (strcmp(behavior_string
, "warn") == 0) {
588 behavior
= extension_warn
;
589 } else if (strcmp(behavior_string
, "require") == 0) {
590 behavior
= extension_require
;
591 } else if (strcmp(behavior_string
, "enable") == 0) {
592 behavior
= extension_enable
;
593 } else if (strcmp(behavior_string
, "disable") == 0) {
594 behavior
= extension_disable
;
596 _mesa_glsl_error(behavior_locp
, state
,
597 "unknown extension behavior `%s'",
602 if (strcmp(name
, "all") == 0) {
603 if ((behavior
== extension_enable
) || (behavior
== extension_require
)) {
604 _mesa_glsl_error(name_locp
, state
, "cannot %s all extensions",
605 (behavior
== extension_enable
)
606 ? "enable" : "require");
610 i
< Elements(_mesa_glsl_supported_extensions
); ++i
) {
611 const _mesa_glsl_extension
*extension
612 = &_mesa_glsl_supported_extensions
[i
];
613 if (extension
->compatible_with_state(state
)) {
614 _mesa_glsl_supported_extensions
[i
].set_flags(state
, behavior
);
619 const _mesa_glsl_extension
*extension
= find_extension(name
);
620 if (extension
&& extension
->compatible_with_state(state
)) {
621 extension
->set_flags(state
, behavior
);
623 static const char *const fmt
= "extension `%s' unsupported in %s shader";
625 if (behavior
== extension_require
) {
626 _mesa_glsl_error(name_locp
, state
, fmt
,
627 name
, _mesa_glsl_shader_target_name(state
->target
));
630 _mesa_glsl_warning(name_locp
, state
, fmt
,
631 name
, _mesa_glsl_shader_target_name(state
->target
));
641 * Returns the name of the type of a column of a matrix. E.g.,
647 _mesa_ast_get_matrix_column_type_name(const char *matrix_type_name
)
649 static const char *vec_name
[] = { "vec2", "vec3", "vec4" };
651 /* The number of elements in a row of a matrix is specified by the last
652 * character of the matrix type name.
654 long rows
= strtol(matrix_type_name
+ strlen(matrix_type_name
) - 1,
656 return vec_name
[rows
- 2];
660 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
661 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
662 * (process_array_constructor, et al) sufficient information to do type
665 * Operates on assignments involving an aggregate initializer. E.g.,
667 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
669 * or more ridiculously,
682 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
683 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
688 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
689 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
695 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
696 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
702 * This pass is necessary because the right-hand side of <type> e = { ... }
703 * doesn't contain sufficient information to determine if the types match.
706 _mesa_ast_set_aggregate_type(const ast_type_specifier
*type
,
707 ast_expression
*expr
,
708 _mesa_glsl_parse_state
*state
)
711 ast_aggregate_initializer
*ai
= (ast_aggregate_initializer
*)expr
;
712 ai
->constructor_type
= (ast_type_specifier
*)type
;
714 bool is_declaration
= ai
->constructor_type
->structure
!= NULL
;
715 if (!is_declaration
) {
716 /* Look up <type> name in the symbol table to see if it's a struct. */
717 const ast_type_specifier
*struct_type
=
718 state
->symbols
->get_type_ast(type
->type_name
);
719 ai
->constructor_type
->structure
=
720 struct_type
? new(ctx
) ast_struct_specifier(*struct_type
->structure
)
724 /* If the aggregate is an array, recursively set its elements' types. */
725 if (type
->is_array
) {
726 /* We want to set the element type which is not an array itself, so make
727 * a copy of the array type and set its is_array field to false.
729 * E.g., if <type> if struct S[2] we want to set each element's type to
732 * FINISHME: Update when ARB_array_of_arrays is supported.
734 const ast_type_specifier
*non_array_type
=
735 new(ctx
) ast_type_specifier(type
, false, NULL
);
737 for (exec_node
*expr_node
= ai
->expressions
.head
;
738 !expr_node
->is_tail_sentinel();
739 expr_node
= expr_node
->next
) {
740 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
743 if (expr
->oper
== ast_aggregate
)
744 _mesa_ast_set_aggregate_type(non_array_type
, expr
, state
);
747 /* If the aggregate is a struct, recursively set its fields' types. */
748 } else if (ai
->constructor_type
->structure
) {
749 ai
->constructor_type
->structure
->is_declaration
= is_declaration
;
750 exec_node
*expr_node
= ai
->expressions
.head
;
752 /* Iterate through the struct's fields' declarations. E.g., iterate from
753 * "float a, b" to "int c" in the struct below.
760 for (exec_node
*decl_list_node
=
761 ai
->constructor_type
->structure
->declarations
.head
;
762 !decl_list_node
->is_tail_sentinel();
763 decl_list_node
= decl_list_node
->next
) {
764 ast_declarator_list
*decl_list
= exec_node_data(ast_declarator_list
,
765 decl_list_node
, link
);
767 for (exec_node
*decl_node
= decl_list
->declarations
.head
;
768 !decl_node
->is_tail_sentinel() && !expr_node
->is_tail_sentinel();
769 decl_node
= decl_node
->next
, expr_node
= expr_node
->next
) {
770 ast_declaration
*decl
= exec_node_data(ast_declaration
, decl_node
,
772 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
775 bool is_array
= decl_list
->type
->specifier
->is_array
;
776 ast_expression
*array_size
= decl_list
->type
->specifier
->array_size
;
778 /* Recognize variable declarations with the bracketed size attached
779 * to the type rather than the variable name as arrays. E.g.,
784 * are both arrays, but <a>'s array_size is decl->array_size, while
785 * <b>'s array_size is decl_list->type->specifier->array_size.
788 /* FINISHME: Update when ARB_array_of_arrays is supported. */
789 is_array
= decl
->is_array
;
790 array_size
= decl
->array_size
;
793 /* Declaration shadows the <type> parameter. */
794 ast_type_specifier
*type
=
795 new(ctx
) ast_type_specifier(decl_list
->type
->specifier
,
796 is_array
, array_size
);
798 if (expr
->oper
== ast_aggregate
)
799 _mesa_ast_set_aggregate_type(type
, expr
, state
);
803 /* If the aggregate is a matrix, set its columns' types. */
805 const glsl_type
*const constructor_type
=
806 ai
->constructor_type
->glsl_type(&name
, state
);
808 if (constructor_type
->is_matrix()) {
809 for (exec_node
*expr_node
= ai
->expressions
.head
;
810 !expr_node
->is_tail_sentinel();
811 expr_node
= expr_node
->next
) {
812 ast_expression
*expr
= exec_node_data(ast_expression
, expr_node
,
815 /* Declaration shadows the <type> parameter. */
816 ast_type_specifier
*type
= new(ctx
)
817 ast_type_specifier(_mesa_ast_get_matrix_column_type_name(name
));
819 if (expr
->oper
== ast_aggregate
)
820 _mesa_ast_set_aggregate_type(type
, expr
, state
);
828 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier
*q
)
830 if (q
->flags
.q
.constant
)
833 if (q
->flags
.q
.invariant
)
834 printf("invariant ");
836 if (q
->flags
.q
.attribute
)
837 printf("attribute ");
839 if (q
->flags
.q
.varying
)
842 if (q
->flags
.q
.in
&& q
->flags
.q
.out
)
852 if (q
->flags
.q
.centroid
)
854 if (q
->flags
.q
.uniform
)
856 if (q
->flags
.q
.smooth
)
860 if (q
->flags
.q
.noperspective
)
861 printf("noperspective ");
866 ast_node::print(void) const
868 printf("unhandled node ");
872 ast_node::ast_node(void)
874 this->location
.source
= 0;
875 this->location
.line
= 0;
876 this->location
.column
= 0;
881 ast_opt_array_size_print(bool is_array
, const ast_expression
*array_size
)
895 ast_compound_statement::print(void) const
899 foreach_list_const(n
, &this->statements
) {
900 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
908 ast_compound_statement::ast_compound_statement(int new_scope
,
909 ast_node
*statements
)
911 this->new_scope
= new_scope
;
913 if (statements
!= NULL
) {
914 this->statements
.push_degenerate_list_at_head(&statements
->link
);
920 ast_expression::print(void) const
934 subexpressions
[0]->print();
935 printf("%s ", operator_string(oper
));
936 subexpressions
[1]->print();
939 case ast_field_selection
:
940 subexpressions
[0]->print();
941 printf(". %s ", primary_expression
.identifier
);
950 printf("%s ", operator_string(oper
));
951 subexpressions
[0]->print();
956 subexpressions
[0]->print();
957 printf("%s ", operator_string(oper
));
960 case ast_conditional
:
961 subexpressions
[0]->print();
963 subexpressions
[1]->print();
965 subexpressions
[2]->print();
968 case ast_array_index
:
969 subexpressions
[0]->print();
971 subexpressions
[1]->print();
975 case ast_function_call
: {
976 subexpressions
[0]->print();
979 foreach_list_const (n
, &this->expressions
) {
980 if (n
!= this->expressions
.get_head())
983 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
992 printf("%s ", primary_expression
.identifier
);
995 case ast_int_constant
:
996 printf("%d ", primary_expression
.int_constant
);
999 case ast_uint_constant
:
1000 printf("%u ", primary_expression
.uint_constant
);
1003 case ast_float_constant
:
1004 printf("%f ", primary_expression
.float_constant
);
1007 case ast_bool_constant
:
1009 primary_expression
.bool_constant
1010 ? "true" : "false");
1013 case ast_sequence
: {
1015 foreach_list_const(n
, & this->expressions
) {
1016 if (n
!= this->expressions
.get_head())
1019 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1026 case ast_aggregate
: {
1028 foreach_list_const(n
, & this->expressions
) {
1029 if (n
!= this->expressions
.get_head())
1032 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1045 ast_expression::ast_expression(int oper
,
1046 ast_expression
*ex0
,
1047 ast_expression
*ex1
,
1048 ast_expression
*ex2
)
1050 this->oper
= ast_operators(oper
);
1051 this->subexpressions
[0] = ex0
;
1052 this->subexpressions
[1] = ex1
;
1053 this->subexpressions
[2] = ex2
;
1054 this->non_lvalue_description
= NULL
;
1059 ast_expression_statement::print(void) const
1062 expression
->print();
1068 ast_expression_statement::ast_expression_statement(ast_expression
*ex
) :
1076 ast_function::print(void) const
1078 return_type
->print();
1079 printf(" %s (", identifier
);
1081 foreach_list_const(n
, & this->parameters
) {
1082 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1090 ast_function::ast_function(void)
1091 : return_type(NULL
), identifier(NULL
), is_definition(false),
1099 ast_fully_specified_type::print(void) const
1101 _mesa_ast_type_qualifier_print(& qualifier
);
1107 ast_parameter_declarator::print(void) const
1111 printf("%s ", identifier
);
1112 ast_opt_array_size_print(is_array
, array_size
);
1117 ast_function_definition::print(void) const
1125 ast_declaration::print(void) const
1127 printf("%s ", identifier
);
1128 ast_opt_array_size_print(is_array
, array_size
);
1132 initializer
->print();
1137 ast_declaration::ast_declaration(const char *identifier
, bool is_array
,
1138 ast_expression
*array_size
,
1139 ast_expression
*initializer
)
1141 this->identifier
= identifier
;
1142 this->is_array
= is_array
;
1143 this->array_size
= array_size
;
1144 this->initializer
= initializer
;
1149 ast_declarator_list::print(void) const
1151 assert(type
|| invariant
);
1156 printf("invariant ");
1158 foreach_list_const (ptr
, & this->declarations
) {
1159 if (ptr
!= this->declarations
.get_head())
1162 ast_node
*ast
= exec_node_data(ast_node
, ptr
, link
);
1170 ast_declarator_list::ast_declarator_list(ast_fully_specified_type
*type
)
1173 this->invariant
= false;
1174 this->ubo_qualifiers_allowed
= false;
1178 ast_jump_statement::print(void) const
1182 printf("continue; ");
1189 if (opt_return_value
)
1190 opt_return_value
->print();
1195 printf("discard; ");
1201 ast_jump_statement::ast_jump_statement(int mode
, ast_expression
*return_value
)
1202 : opt_return_value(NULL
)
1204 this->mode
= ast_jump_modes(mode
);
1206 if (mode
== ast_return
)
1207 opt_return_value
= return_value
;
1212 ast_selection_statement::print(void) const
1218 then_statement
->print();
1220 if (else_statement
) {
1222 else_statement
->print();
1228 ast_selection_statement::ast_selection_statement(ast_expression
*condition
,
1229 ast_node
*then_statement
,
1230 ast_node
*else_statement
)
1232 this->condition
= condition
;
1233 this->then_statement
= then_statement
;
1234 this->else_statement
= else_statement
;
1239 ast_switch_statement::print(void) const
1241 printf("switch ( ");
1242 test_expression
->print();
1249 ast_switch_statement::ast_switch_statement(ast_expression
*test_expression
,
1252 this->test_expression
= test_expression
;
1258 ast_switch_body::print(void) const
1261 if (stmts
!= NULL
) {
1268 ast_switch_body::ast_switch_body(ast_case_statement_list
*stmts
)
1270 this->stmts
= stmts
;
1274 void ast_case_label::print(void) const
1276 if (test_value
!= NULL
) {
1278 test_value
->print();
1281 printf("default: ");
1286 ast_case_label::ast_case_label(ast_expression
*test_value
)
1288 this->test_value
= test_value
;
1292 void ast_case_label_list::print(void) const
1294 foreach_list_const(n
, & this->labels
) {
1295 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1302 ast_case_label_list::ast_case_label_list(void)
1307 void ast_case_statement::print(void) const
1310 foreach_list_const(n
, & this->stmts
) {
1311 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1318 ast_case_statement::ast_case_statement(ast_case_label_list
*labels
)
1320 this->labels
= labels
;
1324 void ast_case_statement_list::print(void) const
1326 foreach_list_const(n
, & this->cases
) {
1327 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1333 ast_case_statement_list::ast_case_statement_list(void)
1339 ast_iteration_statement::print(void) const
1345 init_statement
->print();
1352 if (rest_expression
)
1353 rest_expression
->print();
1379 ast_iteration_statement::ast_iteration_statement(int mode
,
1381 ast_node
*condition
,
1382 ast_expression
*rest_expression
,
1385 this->mode
= ast_iteration_modes(mode
);
1386 this->init_statement
= init
;
1387 this->condition
= condition
;
1388 this->rest_expression
= rest_expression
;
1394 ast_struct_specifier::print(void) const
1396 printf("struct %s { ", name
);
1397 foreach_list_const(n
, &this->declarations
) {
1398 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1405 ast_struct_specifier::ast_struct_specifier(const char *identifier
,
1406 ast_declarator_list
*declarator_list
)
1408 if (identifier
== NULL
) {
1409 static unsigned anon_count
= 1;
1410 identifier
= ralloc_asprintf(this, "#anon_struct_%04x", anon_count
);
1414 this->declarations
.push_degenerate_list_at_head(&declarator_list
->link
);
1415 is_declaration
= true;
1419 set_shader_inout_layout(struct gl_shader
*shader
,
1420 struct _mesa_glsl_parse_state
*state
)
1422 if (shader
->Type
!= GL_GEOMETRY_SHADER
) {
1423 /* Should have been prevented by the parser. */
1424 assert(!state
->gs_input_prim_type_specified
);
1425 assert(!state
->out_qualifier
->flags
.i
);
1429 shader
->Geom
.VerticesOut
= 0;
1430 if (state
->out_qualifier
->flags
.q
.max_vertices
)
1431 shader
->Geom
.VerticesOut
= state
->out_qualifier
->max_vertices
;
1433 if (state
->gs_input_prim_type_specified
) {
1434 shader
->Geom
.InputType
= state
->gs_input_prim_type
;
1436 shader
->Geom
.InputType
= PRIM_UNKNOWN
;
1439 if (state
->out_qualifier
->flags
.q
.prim_type
) {
1440 shader
->Geom
.OutputType
= state
->out_qualifier
->prim_type
;
1442 shader
->Geom
.OutputType
= PRIM_UNKNOWN
;
1449 _mesa_glsl_compile_shader(struct gl_context
*ctx
, struct gl_shader
*shader
,
1450 bool dump_ast
, bool dump_hir
)
1452 struct _mesa_glsl_parse_state
*state
=
1453 new(shader
) _mesa_glsl_parse_state(ctx
, shader
->Type
, shader
);
1454 const char *source
= shader
->Source
;
1456 state
->error
= glcpp_preprocess(state
, &source
, &state
->info_log
,
1457 &ctx
->Extensions
, ctx
);
1459 if (!state
->error
) {
1460 _mesa_glsl_lexer_ctor(state
, source
);
1461 _mesa_glsl_parse(state
);
1462 _mesa_glsl_lexer_dtor(state
);
1466 foreach_list_const(n
, &state
->translation_unit
) {
1467 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1473 ralloc_free(shader
->ir
);
1474 shader
->ir
= new(shader
) exec_list
;
1475 if (!state
->error
&& !state
->translation_unit
.is_empty())
1476 _mesa_ast_to_hir(shader
->ir
, state
);
1478 if (!state
->error
) {
1479 validate_ir_tree(shader
->ir
);
1481 /* Print out the unoptimized IR. */
1483 _mesa_print_ir(shader
->ir
, state
);
1488 if (!state
->error
&& !shader
->ir
->is_empty()) {
1489 struct gl_shader_compiler_options
*options
=
1490 &ctx
->ShaderCompilerOptions
[_mesa_shader_type_to_index(shader
->Type
)];
1492 /* Do some optimization at compile time to reduce shader IR size
1493 * and reduce later work if the same shader is linked multiple times
1495 while (do_common_optimization(shader
->ir
, false, false, 32, options
))
1498 validate_ir_tree(shader
->ir
);
1501 if (shader
->InfoLog
)
1502 ralloc_free(shader
->InfoLog
);
1504 shader
->symbols
= state
->symbols
;
1505 shader
->CompileStatus
= !state
->error
;
1506 shader
->InfoLog
= state
->info_log
;
1507 shader
->Version
= state
->language_version
;
1508 shader
->InfoLog
= state
->info_log
;
1509 shader
->IsES
= state
->es_shader
;
1511 memcpy(shader
->builtins_to_link
, state
->builtins_to_link
,
1512 sizeof(shader
->builtins_to_link
[0]) * state
->num_builtins_to_link
);
1513 shader
->num_builtins_to_link
= state
->num_builtins_to_link
;
1515 if (shader
->UniformBlocks
)
1516 ralloc_free(shader
->UniformBlocks
);
1517 shader
->NumUniformBlocks
= state
->num_uniform_blocks
;
1518 shader
->UniformBlocks
= state
->uniform_blocks
;
1519 ralloc_steal(shader
, shader
->UniformBlocks
);
1522 set_shader_inout_layout(shader
, state
);
1524 /* Retain any live IR, but trash the rest. */
1525 reparent_ir(shader
->ir
, shader
->ir
);
1532 * Do the set of common optimizations passes
1534 * \param ir List of instructions to be optimized
1535 * \param linked Is the shader linked? This enables
1536 * optimizations passes that remove code at
1537 * global scope and could cause linking to
1539 * \param uniform_locations_assigned Have locations already been assigned for
1540 * uniforms? This prevents the declarations
1541 * of unused uniforms from being removed.
1542 * The setting of this flag only matters if
1543 * \c linked is \c true.
1544 * \param max_unroll_iterations Maximum number of loop iterations to be
1545 * unrolled. Setting to 0 disables loop
1547 * \param options The driver's preferred shader options.
1550 do_common_optimization(exec_list
*ir
, bool linked
,
1551 bool uniform_locations_assigned
,
1552 unsigned max_unroll_iterations
,
1553 const struct gl_shader_compiler_options
*options
)
1555 GLboolean progress
= GL_FALSE
;
1557 progress
= lower_instructions(ir
, SUB_TO_ADD_NEG
) || progress
;
1560 progress
= do_function_inlining(ir
) || progress
;
1561 progress
= do_dead_functions(ir
) || progress
;
1562 progress
= do_structure_splitting(ir
) || progress
;
1564 progress
= do_if_simplification(ir
) || progress
;
1565 progress
= opt_flatten_nested_if_blocks(ir
) || progress
;
1566 progress
= do_copy_propagation(ir
) || progress
;
1567 progress
= do_copy_propagation_elements(ir
) || progress
;
1569 if (options
->PreferDP4
&& !linked
)
1570 progress
= opt_flip_matrices(ir
) || progress
;
1573 progress
= do_dead_code(ir
, uniform_locations_assigned
) || progress
;
1575 progress
= do_dead_code_unlinked(ir
) || progress
;
1576 progress
= do_dead_code_local(ir
) || progress
;
1577 progress
= do_tree_grafting(ir
) || progress
;
1578 progress
= do_constant_propagation(ir
) || progress
;
1580 progress
= do_constant_variable(ir
) || progress
;
1582 progress
= do_constant_variable_unlinked(ir
) || progress
;
1583 progress
= do_constant_folding(ir
) || progress
;
1584 progress
= do_algebraic(ir
) || progress
;
1585 progress
= do_lower_jumps(ir
) || progress
;
1586 progress
= do_vec_index_to_swizzle(ir
) || progress
;
1587 progress
= lower_vector_insert(ir
, false) || progress
;
1588 progress
= do_swizzle_swizzle(ir
) || progress
;
1589 progress
= do_noop_swizzle(ir
) || progress
;
1591 progress
= optimize_split_arrays(ir
, linked
) || progress
;
1592 progress
= optimize_redundant_jumps(ir
) || progress
;
1594 loop_state
*ls
= analyze_loop_variables(ir
);
1595 if (ls
->loop_found
) {
1596 progress
= set_loop_controls(ir
, ls
) || progress
;
1597 progress
= unroll_loops(ir
, ls
, max_unroll_iterations
) || progress
;
1607 * To be called at GL teardown time, this frees compiler datastructures.
1609 * After calling this, any previously compiled shaders and shader
1610 * programs would be invalid. So this should happen at approximately
1614 _mesa_destroy_shader_compiler(void)
1616 _mesa_destroy_shader_compiler_caches();
1618 _mesa_glsl_release_types();
1622 * Releases compiler caches to trade off performance for memory.
1624 * Intended to be used with glReleaseShaderCompiler().
1627 _mesa_destroy_shader_compiler_caches(void)
1629 _mesa_glsl_release_functions();