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[mesa.git] / src / compiler / glsl / glsl_parser_extras.cpp
1 /*
2 * Copyright © 2008, 2009 Intel Corporation
3 *
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:
10 *
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
13 * Software.
14 *
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.
22 */
23 #include <stdio.h>
24 #include <stdarg.h>
25 #include <string.h>
26 #include <assert.h>
27
28 #include "main/core.h" /* for struct gl_context */
29 #include "main/context.h"
30 #include "main/debug_output.h"
31 #include "main/shaderobj.h"
32 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
33 #include "util/ralloc.h"
34 #include "ast.h"
35 #include "glsl_parser_extras.h"
36 #include "glsl_parser.h"
37 #include "ir_optimization.h"
38 #include "loop_analysis.h"
39
40 /**
41 * Format a short human-readable description of the given GLSL version.
42 */
43 const char *
44 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
45 {
46 return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
47 version / 100, version % 100);
48 }
49
50
51 static const unsigned known_desktop_glsl_versions[] =
52 { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450 };
53 static const unsigned known_desktop_gl_versions[] =
54 { 20, 21, 30, 31, 32, 33, 40, 41, 42, 43, 44, 45 };
55
56
57 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
58 gl_shader_stage stage,
59 void *mem_ctx)
60 : ctx(_ctx), cs_input_local_size_specified(false), cs_input_local_size(),
61 switch_state()
62 {
63 assert(stage < MESA_SHADER_STAGES);
64 this->stage = stage;
65
66 this->scanner = NULL;
67 this->translation_unit.make_empty();
68 this->symbols = new(mem_ctx) glsl_symbol_table;
69
70 this->info_log = ralloc_strdup(mem_ctx, "");
71 this->error = false;
72 this->loop_nesting_ast = NULL;
73
74 this->uses_builtin_functions = false;
75
76 /* Set default language version and extensions */
77 this->language_version = 110;
78 this->forced_language_version = ctx->Const.ForceGLSLVersion;
79 this->zero_init = ctx->Const.GLSLZeroInit;
80 this->gl_version = 20;
81 this->es_shader = false;
82 this->ARB_texture_rectangle_enable = true;
83
84 /* OpenGL ES 2.0 has different defaults from desktop GL. */
85 if (ctx->API == API_OPENGLES2) {
86 this->language_version = 100;
87 this->es_shader = true;
88 this->ARB_texture_rectangle_enable = false;
89 }
90
91 this->extensions = &ctx->Extensions;
92
93 this->Const.MaxLights = ctx->Const.MaxLights;
94 this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
95 this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
96 this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
97 this->Const.MaxVertexAttribs = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs;
98 this->Const.MaxVertexUniformComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxUniformComponents;
99 this->Const.MaxVertexTextureImageUnits = ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits;
100 this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
101 this->Const.MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
102 this->Const.MaxFragmentUniformComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxUniformComponents;
103 this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset;
104 this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset;
105
106 this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
107
108 this->Const.MaxDualSourceDrawBuffers = ctx->Const.MaxDualSourceDrawBuffers;
109
110 /* 1.50 constants */
111 this->Const.MaxVertexOutputComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents;
112 this->Const.MaxGeometryInputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxInputComponents;
113 this->Const.MaxGeometryOutputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxOutputComponents;
114 this->Const.MaxFragmentInputComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents;
115 this->Const.MaxGeometryTextureImageUnits = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits;
116 this->Const.MaxGeometryOutputVertices = ctx->Const.MaxGeometryOutputVertices;
117 this->Const.MaxGeometryTotalOutputComponents = ctx->Const.MaxGeometryTotalOutputComponents;
118 this->Const.MaxGeometryUniformComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxUniformComponents;
119
120 this->Const.MaxVertexAtomicCounters = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicCounters;
121 this->Const.MaxTessControlAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters;
122 this->Const.MaxTessEvaluationAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicCounters;
123 this->Const.MaxGeometryAtomicCounters = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicCounters;
124 this->Const.MaxFragmentAtomicCounters = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
125 this->Const.MaxComputeAtomicCounters = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicCounters;
126 this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
127 this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
128 this->Const.MaxVertexAtomicCounterBuffers =
129 ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicBuffers;
130 this->Const.MaxTessControlAtomicCounterBuffers =
131 ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers;
132 this->Const.MaxTessEvaluationAtomicCounterBuffers =
133 ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers;
134 this->Const.MaxGeometryAtomicCounterBuffers =
135 ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers;
136 this->Const.MaxFragmentAtomicCounterBuffers =
137 ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
138 this->Const.MaxComputeAtomicCounterBuffers =
139 ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers;
140 this->Const.MaxCombinedAtomicCounterBuffers =
141 ctx->Const.MaxCombinedAtomicBuffers;
142 this->Const.MaxAtomicCounterBufferSize =
143 ctx->Const.MaxAtomicBufferSize;
144
145 /* ARB_enhanced_layouts constants */
146 this->Const.MaxTransformFeedbackBuffers = ctx->Const.MaxTransformFeedbackBuffers;
147 this->Const.MaxTransformFeedbackInterleavedComponents = ctx->Const.MaxTransformFeedbackInterleavedComponents;
148
149 /* Compute shader constants */
150 for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupCount); i++)
151 this->Const.MaxComputeWorkGroupCount[i] = ctx->Const.MaxComputeWorkGroupCount[i];
152 for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupSize); i++)
153 this->Const.MaxComputeWorkGroupSize[i] = ctx->Const.MaxComputeWorkGroupSize[i];
154
155 this->Const.MaxComputeTextureImageUnits = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
156 this->Const.MaxComputeUniformComponents = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxUniformComponents;
157
158 this->Const.MaxImageUnits = ctx->Const.MaxImageUnits;
159 this->Const.MaxCombinedShaderOutputResources = ctx->Const.MaxCombinedShaderOutputResources;
160 this->Const.MaxImageSamples = ctx->Const.MaxImageSamples;
161 this->Const.MaxVertexImageUniforms = ctx->Const.Program[MESA_SHADER_VERTEX].MaxImageUniforms;
162 this->Const.MaxTessControlImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms;
163 this->Const.MaxTessEvaluationImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms;
164 this->Const.MaxGeometryImageUniforms = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxImageUniforms;
165 this->Const.MaxFragmentImageUniforms = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxImageUniforms;
166 this->Const.MaxComputeImageUniforms = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
167 this->Const.MaxCombinedImageUniforms = ctx->Const.MaxCombinedImageUniforms;
168
169 /* ARB_viewport_array */
170 this->Const.MaxViewports = ctx->Const.MaxViewports;
171
172 /* tessellation shader constants */
173 this->Const.MaxPatchVertices = ctx->Const.MaxPatchVertices;
174 this->Const.MaxTessGenLevel = ctx->Const.MaxTessGenLevel;
175 this->Const.MaxTessControlInputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents;
176 this->Const.MaxTessControlOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents;
177 this->Const.MaxTessControlTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits;
178 this->Const.MaxTessEvaluationInputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents;
179 this->Const.MaxTessEvaluationOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents;
180 this->Const.MaxTessEvaluationTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits;
181 this->Const.MaxTessPatchComponents = ctx->Const.MaxTessPatchComponents;
182 this->Const.MaxTessControlTotalOutputComponents = ctx->Const.MaxTessControlTotalOutputComponents;
183 this->Const.MaxTessControlUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents;
184 this->Const.MaxTessEvaluationUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents;
185
186 /* GL 4.5 / OES_sample_variables */
187 this->Const.MaxSamples = ctx->Const.MaxSamples;
188
189 this->current_function = NULL;
190 this->toplevel_ir = NULL;
191 this->found_return = false;
192 this->all_invariant = false;
193 this->user_structures = NULL;
194 this->num_user_structures = 0;
195 this->num_subroutines = 0;
196 this->subroutines = NULL;
197 this->num_subroutine_types = 0;
198 this->subroutine_types = NULL;
199
200 /* supported_versions should be large enough to support the known desktop
201 * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
202 */
203 STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 4) ==
204 ARRAY_SIZE(this->supported_versions));
205
206 /* Populate the list of supported GLSL versions */
207 /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
208 * the OpenGL 3.2 Core context is supported, this logic will need
209 * change. Older versions of GLSL are no longer supported
210 * outside the compatibility contexts of 3.x.
211 */
212 this->num_supported_versions = 0;
213 if (_mesa_is_desktop_gl(ctx)) {
214 for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
215 if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
216 this->supported_versions[this->num_supported_versions].ver
217 = known_desktop_glsl_versions[i];
218 this->supported_versions[this->num_supported_versions].gl_ver
219 = known_desktop_gl_versions[i];
220 this->supported_versions[this->num_supported_versions].es = false;
221 this->num_supported_versions++;
222 }
223 }
224 }
225 if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
226 this->supported_versions[this->num_supported_versions].ver = 100;
227 this->supported_versions[this->num_supported_versions].gl_ver = 20;
228 this->supported_versions[this->num_supported_versions].es = true;
229 this->num_supported_versions++;
230 }
231 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
232 this->supported_versions[this->num_supported_versions].ver = 300;
233 this->supported_versions[this->num_supported_versions].gl_ver = 30;
234 this->supported_versions[this->num_supported_versions].es = true;
235 this->num_supported_versions++;
236 }
237 if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
238 this->supported_versions[this->num_supported_versions].ver = 310;
239 this->supported_versions[this->num_supported_versions].gl_ver = 31;
240 this->supported_versions[this->num_supported_versions].es = true;
241 this->num_supported_versions++;
242 }
243 if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
244 ctx->Extensions.ARB_ES3_2_compatibility) {
245 this->supported_versions[this->num_supported_versions].ver = 320;
246 this->supported_versions[this->num_supported_versions].gl_ver = 32;
247 this->supported_versions[this->num_supported_versions].es = true;
248 this->num_supported_versions++;
249 }
250
251 /* Create a string for use in error messages to tell the user which GLSL
252 * versions are supported.
253 */
254 char *supported = ralloc_strdup(this, "");
255 for (unsigned i = 0; i < this->num_supported_versions; i++) {
256 unsigned ver = this->supported_versions[i].ver;
257 const char *const prefix = (i == 0)
258 ? ""
259 : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
260 const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
261
262 ralloc_asprintf_append(& supported, "%s%u.%02u%s",
263 prefix,
264 ver / 100, ver % 100,
265 suffix);
266 }
267
268 this->supported_version_string = supported;
269
270 if (ctx->Const.ForceGLSLExtensionsWarn)
271 _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
272
273 this->default_uniform_qualifier = new(this) ast_type_qualifier();
274 this->default_uniform_qualifier->flags.q.shared = 1;
275 this->default_uniform_qualifier->flags.q.column_major = 1;
276 this->default_uniform_qualifier->is_default_qualifier = true;
277
278 this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
279 this->default_shader_storage_qualifier->flags.q.shared = 1;
280 this->default_shader_storage_qualifier->flags.q.column_major = 1;
281 this->default_shader_storage_qualifier->is_default_qualifier = true;
282
283 this->fs_uses_gl_fragcoord = false;
284 this->fs_redeclares_gl_fragcoord = false;
285 this->fs_origin_upper_left = false;
286 this->fs_pixel_center_integer = false;
287 this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
288
289 this->gs_input_prim_type_specified = false;
290 this->tcs_output_vertices_specified = false;
291 this->gs_input_size = 0;
292 this->in_qualifier = new(this) ast_type_qualifier();
293 this->out_qualifier = new(this) ast_type_qualifier();
294 this->fs_early_fragment_tests = false;
295 this->fs_blend_support = 0;
296 memset(this->atomic_counter_offsets, 0,
297 sizeof(this->atomic_counter_offsets));
298 this->allow_extension_directive_midshader =
299 ctx->Const.AllowGLSLExtensionDirectiveMidShader;
300 }
301
302 /**
303 * Determine whether the current GLSL version is sufficiently high to support
304 * a certain feature, and generate an error message if it isn't.
305 *
306 * \param required_glsl_version and \c required_glsl_es_version are
307 * interpreted as they are in _mesa_glsl_parse_state::is_version().
308 *
309 * \param locp is the parser location where the error should be reported.
310 *
311 * \param fmt (and additional arguments) constitute a printf-style error
312 * message to report if the version check fails. Information about the
313 * current and required GLSL versions will be appended. So, for example, if
314 * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
315 * "foo unsupported") is called, the error message will be "foo unsupported in
316 * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
317 */
318 bool
319 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
320 unsigned required_glsl_es_version,
321 YYLTYPE *locp, const char *fmt, ...)
322 {
323 if (this->is_version(required_glsl_version, required_glsl_es_version))
324 return true;
325
326 va_list args;
327 va_start(args, fmt);
328 char *problem = ralloc_vasprintf(this, fmt, args);
329 va_end(args);
330 const char *glsl_version_string
331 = glsl_compute_version_string(this, false, required_glsl_version);
332 const char *glsl_es_version_string
333 = glsl_compute_version_string(this, true, required_glsl_es_version);
334 const char *requirement_string = "";
335 if (required_glsl_version && required_glsl_es_version) {
336 requirement_string = ralloc_asprintf(this, " (%s or %s required)",
337 glsl_version_string,
338 glsl_es_version_string);
339 } else if (required_glsl_version) {
340 requirement_string = ralloc_asprintf(this, " (%s required)",
341 glsl_version_string);
342 } else if (required_glsl_es_version) {
343 requirement_string = ralloc_asprintf(this, " (%s required)",
344 glsl_es_version_string);
345 }
346 _mesa_glsl_error(locp, this, "%s in %s%s",
347 problem, this->get_version_string(),
348 requirement_string);
349
350 return false;
351 }
352
353 /**
354 * Process a GLSL #version directive.
355 *
356 * \param version is the integer that follows the #version token.
357 *
358 * \param ident is a string identifier that follows the integer, if any is
359 * present. Otherwise NULL.
360 */
361 void
362 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
363 const char *ident)
364 {
365 bool es_token_present = false;
366 if (ident) {
367 if (strcmp(ident, "es") == 0) {
368 es_token_present = true;
369 } else if (version >= 150) {
370 if (strcmp(ident, "core") == 0) {
371 /* Accept the token. There's no need to record that this is
372 * a core profile shader since that's the only profile we support.
373 */
374 } else if (strcmp(ident, "compatibility") == 0) {
375 _mesa_glsl_error(locp, this,
376 "the compatibility profile is not supported");
377 } else {
378 _mesa_glsl_error(locp, this,
379 "\"%s\" is not a valid shading language profile; "
380 "if present, it must be \"core\"", ident);
381 }
382 } else {
383 _mesa_glsl_error(locp, this,
384 "illegal text following version number");
385 }
386 }
387
388 this->es_shader = es_token_present;
389 if (version == 100) {
390 if (es_token_present) {
391 _mesa_glsl_error(locp, this,
392 "GLSL 1.00 ES should be selected using "
393 "`#version 100'");
394 } else {
395 this->es_shader = true;
396 }
397 }
398
399 if (this->es_shader) {
400 this->ARB_texture_rectangle_enable = false;
401 }
402
403 if (this->forced_language_version)
404 this->language_version = this->forced_language_version;
405 else
406 this->language_version = version;
407
408 bool supported = false;
409 for (unsigned i = 0; i < this->num_supported_versions; i++) {
410 if (this->supported_versions[i].ver == this->language_version
411 && this->supported_versions[i].es == this->es_shader) {
412 this->gl_version = this->supported_versions[i].gl_ver;
413 supported = true;
414 break;
415 }
416 }
417
418 if (!supported) {
419 _mesa_glsl_error(locp, this, "%s is not supported. "
420 "Supported versions are: %s",
421 this->get_version_string(),
422 this->supported_version_string);
423
424 /* On exit, the language_version must be set to a valid value.
425 * Later calls to _mesa_glsl_initialize_types will misbehave if
426 * the version is invalid.
427 */
428 switch (this->ctx->API) {
429 case API_OPENGL_COMPAT:
430 case API_OPENGL_CORE:
431 this->language_version = this->ctx->Const.GLSLVersion;
432 break;
433
434 case API_OPENGLES:
435 assert(!"Should not get here.");
436 /* FALLTHROUGH */
437
438 case API_OPENGLES2:
439 this->language_version = 100;
440 break;
441 }
442 }
443 }
444
445
446 /* This helper function will append the given message to the shader's
447 info log and report it via GL_ARB_debug_output. Per that extension,
448 'type' is one of the enum values classifying the message, and
449 'id' is the implementation-defined ID of the given message. */
450 static void
451 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
452 GLenum type, const char *fmt, va_list ap)
453 {
454 bool error = (type == MESA_DEBUG_TYPE_ERROR);
455 GLuint msg_id = 0;
456
457 assert(state->info_log != NULL);
458
459 /* Get the offset that the new message will be written to. */
460 int msg_offset = strlen(state->info_log);
461
462 ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
463 locp->source,
464 locp->first_line,
465 locp->first_column,
466 error ? "error" : "warning");
467 ralloc_vasprintf_append(&state->info_log, fmt, ap);
468
469 const char *const msg = &state->info_log[msg_offset];
470 struct gl_context *ctx = state->ctx;
471
472 /* Report the error via GL_ARB_debug_output. */
473 _mesa_shader_debug(ctx, type, &msg_id, msg);
474
475 ralloc_strcat(&state->info_log, "\n");
476 }
477
478 void
479 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
480 const char *fmt, ...)
481 {
482 va_list ap;
483
484 state->error = true;
485
486 va_start(ap, fmt);
487 _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
488 va_end(ap);
489 }
490
491
492 void
493 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
494 const char *fmt, ...)
495 {
496 va_list ap;
497
498 va_start(ap, fmt);
499 _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
500 va_end(ap);
501 }
502
503
504 /**
505 * Enum representing the possible behaviors that can be specified in
506 * an #extension directive.
507 */
508 enum ext_behavior {
509 extension_disable,
510 extension_enable,
511 extension_require,
512 extension_warn
513 };
514
515 /**
516 * Element type for _mesa_glsl_supported_extensions
517 */
518 struct _mesa_glsl_extension {
519 /**
520 * Name of the extension when referred to in a GLSL extension
521 * statement
522 */
523 const char *name;
524
525 /**
526 * Whether this extension is a part of AEP
527 */
528 bool aep;
529
530 /**
531 * Predicate that checks whether the relevant extension is available for
532 * this context.
533 */
534 bool (*available_pred)(const struct gl_context *,
535 gl_api api, uint8_t version);
536
537 /**
538 * Flag in the _mesa_glsl_parse_state struct that should be set
539 * when this extension is enabled.
540 *
541 * See note in _mesa_glsl_extension::supported_flag about "pointer
542 * to member" types.
543 */
544 bool _mesa_glsl_parse_state::* enable_flag;
545
546 /**
547 * Flag in the _mesa_glsl_parse_state struct that should be set
548 * when the shader requests "warn" behavior for this extension.
549 *
550 * See note in _mesa_glsl_extension::supported_flag about "pointer
551 * to member" types.
552 */
553 bool _mesa_glsl_parse_state::* warn_flag;
554
555
556 bool compatible_with_state(const _mesa_glsl_parse_state *state,
557 gl_api api, uint8_t gl_version) const;
558 void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
559 };
560
561 /** Checks if the context supports a user-facing extension */
562 #define EXT(name_str, driver_cap, ...) \
563 static MAYBE_UNUSED bool \
564 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
565 { \
566 return ctx->Extensions.driver_cap && (version >= \
567 _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
568 }
569 #include "main/extensions_table.h"
570 #undef EXT
571
572 #define EXT(NAME) \
573 { "GL_" #NAME, false, has_##NAME, \
574 &_mesa_glsl_parse_state::NAME##_enable, \
575 &_mesa_glsl_parse_state::NAME##_warn }
576
577 #define EXT_AEP(NAME) \
578 { "GL_" #NAME, true, has_##NAME, \
579 &_mesa_glsl_parse_state::NAME##_enable, \
580 &_mesa_glsl_parse_state::NAME##_warn }
581
582 /**
583 * Table of extensions that can be enabled/disabled within a shader,
584 * and the conditions under which they are supported.
585 */
586 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
587 /* ARB extensions go here, sorted alphabetically.
588 */
589 EXT(ARB_ES3_1_compatibility),
590 EXT(ARB_ES3_2_compatibility),
591 EXT(ARB_arrays_of_arrays),
592 EXT(ARB_compute_shader),
593 EXT(ARB_conservative_depth),
594 EXT(ARB_cull_distance),
595 EXT(ARB_derivative_control),
596 EXT(ARB_draw_buffers),
597 EXT(ARB_draw_instanced),
598 EXT(ARB_enhanced_layouts),
599 EXT(ARB_explicit_attrib_location),
600 EXT(ARB_explicit_uniform_location),
601 EXT(ARB_fragment_coord_conventions),
602 EXT(ARB_fragment_layer_viewport),
603 EXT(ARB_gpu_shader5),
604 EXT(ARB_gpu_shader_fp64),
605 EXT(ARB_sample_shading),
606 EXT(ARB_separate_shader_objects),
607 EXT(ARB_shader_atomic_counter_ops),
608 EXT(ARB_shader_atomic_counters),
609 EXT(ARB_shader_bit_encoding),
610 EXT(ARB_shader_clock),
611 EXT(ARB_shader_draw_parameters),
612 EXT(ARB_shader_group_vote),
613 EXT(ARB_shader_image_load_store),
614 EXT(ARB_shader_image_size),
615 EXT(ARB_shader_precision),
616 EXT(ARB_shader_stencil_export),
617 EXT(ARB_shader_storage_buffer_object),
618 EXT(ARB_shader_subroutine),
619 EXT(ARB_shader_texture_image_samples),
620 EXT(ARB_shader_texture_lod),
621 EXT(ARB_shader_viewport_layer_array),
622 EXT(ARB_shading_language_420pack),
623 EXT(ARB_shading_language_packing),
624 EXT(ARB_tessellation_shader),
625 EXT(ARB_texture_cube_map_array),
626 EXT(ARB_texture_gather),
627 EXT(ARB_texture_multisample),
628 EXT(ARB_texture_query_levels),
629 EXT(ARB_texture_query_lod),
630 EXT(ARB_texture_rectangle),
631 EXT(ARB_uniform_buffer_object),
632 EXT(ARB_vertex_attrib_64bit),
633 EXT(ARB_viewport_array),
634
635 /* KHR extensions go here, sorted alphabetically.
636 */
637 EXT_AEP(KHR_blend_equation_advanced),
638
639 /* OES extensions go here, sorted alphabetically.
640 */
641 EXT(OES_EGL_image_external),
642 EXT(OES_geometry_point_size),
643 EXT(OES_geometry_shader),
644 EXT(OES_gpu_shader5),
645 EXT(OES_primitive_bounding_box),
646 EXT_AEP(OES_sample_variables),
647 EXT_AEP(OES_shader_image_atomic),
648 EXT(OES_shader_io_blocks),
649 EXT_AEP(OES_shader_multisample_interpolation),
650 EXT(OES_standard_derivatives),
651 EXT(OES_tessellation_point_size),
652 EXT(OES_tessellation_shader),
653 EXT(OES_texture_3D),
654 EXT(OES_texture_buffer),
655 EXT(OES_texture_cube_map_array),
656 EXT_AEP(OES_texture_storage_multisample_2d_array),
657 EXT(OES_viewport_array),
658
659 /* All other extensions go here, sorted alphabetically.
660 */
661 EXT(AMD_conservative_depth),
662 EXT(AMD_shader_stencil_export),
663 EXT(AMD_shader_trinary_minmax),
664 EXT(AMD_vertex_shader_layer),
665 EXT(AMD_vertex_shader_viewport_index),
666 EXT(ANDROID_extension_pack_es31a),
667 EXT(EXT_blend_func_extended),
668 EXT(EXT_draw_buffers),
669 EXT(EXT_clip_cull_distance),
670 EXT(EXT_geometry_point_size),
671 EXT_AEP(EXT_geometry_shader),
672 EXT_AEP(EXT_gpu_shader5),
673 EXT_AEP(EXT_primitive_bounding_box),
674 EXT(EXT_separate_shader_objects),
675 EXT(EXT_shader_framebuffer_fetch),
676 EXT(EXT_shader_integer_mix),
677 EXT_AEP(EXT_shader_io_blocks),
678 EXT(EXT_shader_samples_identical),
679 EXT(EXT_tessellation_point_size),
680 EXT_AEP(EXT_tessellation_shader),
681 EXT(EXT_texture_array),
682 EXT_AEP(EXT_texture_buffer),
683 EXT_AEP(EXT_texture_cube_map_array),
684 EXT(MESA_shader_integer_functions),
685 };
686
687 #undef EXT
688
689
690 /**
691 * Determine whether a given extension is compatible with the target,
692 * API, and extension information in the current parser state.
693 */
694 bool _mesa_glsl_extension::compatible_with_state(
695 const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
696 {
697 return this->available_pred(state->ctx, api, gl_version);
698 }
699
700 /**
701 * Set the appropriate flags in the parser state to establish the
702 * given behavior for this extension.
703 */
704 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
705 ext_behavior behavior) const
706 {
707 /* Note: the ->* operator indexes into state by the
708 * offsets this->enable_flag and this->warn_flag. See
709 * _mesa_glsl_extension::supported_flag for more info.
710 */
711 state->*(this->enable_flag) = (behavior != extension_disable);
712 state->*(this->warn_flag) = (behavior == extension_warn);
713 }
714
715 /**
716 * Find an extension by name in _mesa_glsl_supported_extensions. If
717 * the name is not found, return NULL.
718 */
719 static const _mesa_glsl_extension *find_extension(const char *name)
720 {
721 for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
722 if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
723 return &_mesa_glsl_supported_extensions[i];
724 }
725 }
726 return NULL;
727 }
728
729 bool
730 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
731 const char *behavior_string, YYLTYPE *behavior_locp,
732 _mesa_glsl_parse_state *state)
733 {
734 uint8_t gl_version = state->ctx->Extensions.Version;
735 gl_api api = state->ctx->API;
736 ext_behavior behavior;
737 if (strcmp(behavior_string, "warn") == 0) {
738 behavior = extension_warn;
739 } else if (strcmp(behavior_string, "require") == 0) {
740 behavior = extension_require;
741 } else if (strcmp(behavior_string, "enable") == 0) {
742 behavior = extension_enable;
743 } else if (strcmp(behavior_string, "disable") == 0) {
744 behavior = extension_disable;
745 } else {
746 _mesa_glsl_error(behavior_locp, state,
747 "unknown extension behavior `%s'",
748 behavior_string);
749 return false;
750 }
751
752 /* If we're in a desktop context but with an ES shader, use an ES API enum
753 * to verify extension availability.
754 */
755 if (state->es_shader && api != API_OPENGLES2)
756 api = API_OPENGLES2;
757 /* Use the language-version derived GL version to extension checks, unless
758 * we're using meta, which sets the version to the max.
759 */
760 if (gl_version != 0xff)
761 gl_version = state->gl_version;
762
763 if (strcmp(name, "all") == 0) {
764 if ((behavior == extension_enable) || (behavior == extension_require)) {
765 _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
766 (behavior == extension_enable)
767 ? "enable" : "require");
768 return false;
769 } else {
770 for (unsigned i = 0;
771 i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
772 const _mesa_glsl_extension *extension
773 = &_mesa_glsl_supported_extensions[i];
774 if (extension->compatible_with_state(state, api, gl_version)) {
775 _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
776 }
777 }
778 }
779 } else {
780 const _mesa_glsl_extension *extension = find_extension(name);
781 if (extension && extension->compatible_with_state(state, api, gl_version)) {
782 extension->set_flags(state, behavior);
783 if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
784 for (unsigned i = 0;
785 i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
786 const _mesa_glsl_extension *extension =
787 &_mesa_glsl_supported_extensions[i];
788
789 if (!extension->aep)
790 continue;
791 /* AEP should not be enabled if all of the sub-extensions can't
792 * also be enabled. This is not the proper layer to do such
793 * error-checking though.
794 */
795 assert(extension->compatible_with_state(state, api, gl_version));
796 extension->set_flags(state, behavior);
797 }
798 }
799 } else {
800 static const char fmt[] = "extension `%s' unsupported in %s shader";
801
802 if (behavior == extension_require) {
803 _mesa_glsl_error(name_locp, state, fmt,
804 name, _mesa_shader_stage_to_string(state->stage));
805 return false;
806 } else {
807 _mesa_glsl_warning(name_locp, state, fmt,
808 name, _mesa_shader_stage_to_string(state->stage));
809 }
810 }
811 }
812
813 return true;
814 }
815
816
817 /**
818 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
819 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
820 * (process_array_constructor, et al) sufficient information to do type
821 * checking.
822 *
823 * Operates on assignments involving an aggregate initializer. E.g.,
824 *
825 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
826 *
827 * or more ridiculously,
828 *
829 * struct S {
830 * vec4 v[2];
831 * };
832 *
833 * struct {
834 * S a[2], b;
835 * int c;
836 * } aggregate = {
837 * {
838 * {
839 * {
840 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
841 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
842 * } // a[0].v
843 * }, // a[0]
844 * {
845 * {
846 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
847 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
848 * } // a[1].v
849 * } // a[1]
850 * }, // a
851 * {
852 * {
853 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
854 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
855 * } // b.v
856 * }, // b
857 * 4 // c
858 * };
859 *
860 * This pass is necessary because the right-hand side of <type> e = { ... }
861 * doesn't contain sufficient information to determine if the types match.
862 */
863 void
864 _mesa_ast_set_aggregate_type(const glsl_type *type,
865 ast_expression *expr)
866 {
867 ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
868 ai->constructor_type = type;
869
870 /* If the aggregate is an array, recursively set its elements' types. */
871 if (type->is_array()) {
872 /* Each array element has the type type->fields.array.
873 *
874 * E.g., if <type> if struct S[2] we want to set each element's type to
875 * struct S.
876 */
877 for (exec_node *expr_node = ai->expressions.get_head_raw();
878 !expr_node->is_tail_sentinel();
879 expr_node = expr_node->next) {
880 ast_expression *expr = exec_node_data(ast_expression, expr_node,
881 link);
882
883 if (expr->oper == ast_aggregate)
884 _mesa_ast_set_aggregate_type(type->fields.array, expr);
885 }
886
887 /* If the aggregate is a struct, recursively set its fields' types. */
888 } else if (type->is_record()) {
889 exec_node *expr_node = ai->expressions.get_head_raw();
890
891 /* Iterate through the struct's fields. */
892 for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
893 i++, expr_node = expr_node->next) {
894 ast_expression *expr = exec_node_data(ast_expression, expr_node,
895 link);
896
897 if (expr->oper == ast_aggregate) {
898 _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
899 }
900 }
901 /* If the aggregate is a matrix, set its columns' types. */
902 } else if (type->is_matrix()) {
903 for (exec_node *expr_node = ai->expressions.get_head_raw();
904 !expr_node->is_tail_sentinel();
905 expr_node = expr_node->next) {
906 ast_expression *expr = exec_node_data(ast_expression, expr_node,
907 link);
908
909 if (expr->oper == ast_aggregate)
910 _mesa_ast_set_aggregate_type(type->column_type(), expr);
911 }
912 }
913 }
914
915 void
916 _mesa_ast_process_interface_block(YYLTYPE *locp,
917 _mesa_glsl_parse_state *state,
918 ast_interface_block *const block,
919 const struct ast_type_qualifier &q)
920 {
921 if (q.flags.q.buffer) {
922 if (!state->has_shader_storage_buffer_objects()) {
923 _mesa_glsl_error(locp, state,
924 "#version 430 / GL_ARB_shader_storage_buffer_object "
925 "required for defining shader storage blocks");
926 } else if (state->ARB_shader_storage_buffer_object_warn) {
927 _mesa_glsl_warning(locp, state,
928 "#version 430 / GL_ARB_shader_storage_buffer_object "
929 "required for defining shader storage blocks");
930 }
931 } else if (q.flags.q.uniform) {
932 if (!state->has_uniform_buffer_objects()) {
933 _mesa_glsl_error(locp, state,
934 "#version 140 / GL_ARB_uniform_buffer_object "
935 "required for defining uniform blocks");
936 } else if (state->ARB_uniform_buffer_object_warn) {
937 _mesa_glsl_warning(locp, state,
938 "#version 140 / GL_ARB_uniform_buffer_object "
939 "required for defining uniform blocks");
940 }
941 } else {
942 if (!state->has_shader_io_blocks()) {
943 if (state->es_shader) {
944 _mesa_glsl_error(locp, state,
945 "GL_OES_shader_io_blocks or #version 320 "
946 "required for using interface blocks");
947 } else {
948 _mesa_glsl_error(locp, state,
949 "#version 150 required for using "
950 "interface blocks");
951 }
952 }
953 }
954
955 /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
956 * "It is illegal to have an input block in a vertex shader
957 * or an output block in a fragment shader"
958 */
959 if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
960 _mesa_glsl_error(locp, state,
961 "`in' interface block is not allowed for "
962 "a vertex shader");
963 } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
964 _mesa_glsl_error(locp, state,
965 "`out' interface block is not allowed for "
966 "a fragment shader");
967 }
968
969 /* Since block arrays require names, and both features are added in
970 * the same language versions, we don't have to explicitly
971 * version-check both things.
972 */
973 if (block->instance_name != NULL) {
974 state->check_version(150, 300, locp, "interface blocks with "
975 "an instance name are not allowed");
976 }
977
978 uint64_t interface_type_mask;
979 struct ast_type_qualifier temp_type_qualifier;
980
981 /* Get a bitmask containing only the in/out/uniform/buffer
982 * flags, allowing us to ignore other irrelevant flags like
983 * interpolation qualifiers.
984 */
985 temp_type_qualifier.flags.i = 0;
986 temp_type_qualifier.flags.q.uniform = true;
987 temp_type_qualifier.flags.q.in = true;
988 temp_type_qualifier.flags.q.out = true;
989 temp_type_qualifier.flags.q.buffer = true;
990 temp_type_qualifier.flags.q.patch = true;
991 interface_type_mask = temp_type_qualifier.flags.i;
992
993 /* Get the block's interface qualifier. The interface_qualifier
994 * production rule guarantees that only one bit will be set (and
995 * it will be in/out/uniform).
996 */
997 uint64_t block_interface_qualifier = q.flags.i;
998
999 block->layout.flags.i |= block_interface_qualifier;
1000
1001 if (state->stage == MESA_SHADER_GEOMETRY &&
1002 state->has_explicit_attrib_stream() &&
1003 block->layout.flags.q.out) {
1004 /* Assign global layout's stream value. */
1005 block->layout.flags.q.stream = 1;
1006 block->layout.flags.q.explicit_stream = 0;
1007 block->layout.stream = state->out_qualifier->stream;
1008 }
1009
1010 if (state->has_enhanced_layouts() && block->layout.flags.q.out) {
1011 /* Assign global layout's xfb_buffer value. */
1012 block->layout.flags.q.xfb_buffer = 1;
1013 block->layout.flags.q.explicit_xfb_buffer = 0;
1014 block->layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1015 }
1016
1017 foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1018 ast_type_qualifier& qualifier = member->type->qualifier;
1019 if ((qualifier.flags.i & interface_type_mask) == 0) {
1020 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1021 * "If no optional qualifier is used in a member declaration, the
1022 * qualifier of the variable is just in, out, or uniform as declared
1023 * by interface-qualifier."
1024 */
1025 qualifier.flags.i |= block_interface_qualifier;
1026 } else if ((qualifier.flags.i & interface_type_mask) !=
1027 block_interface_qualifier) {
1028 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1029 * "If optional qualifiers are used, they can include interpolation
1030 * and storage qualifiers and they must declare an input, output,
1031 * or uniform variable consistent with the interface qualifier of
1032 * the block."
1033 */
1034 _mesa_glsl_error(locp, state,
1035 "uniform/in/out qualifier on "
1036 "interface block member does not match "
1037 "the interface block");
1038 }
1039
1040 if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1041 _mesa_glsl_error(locp, state,
1042 "invariant qualifiers can be used only "
1043 "in interface block members for shader "
1044 "inputs or outputs");
1045 }
1046 }
1047
1048 void
1049 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1050 {
1051 if (q->flags.q.subroutine)
1052 printf("subroutine ");
1053
1054 if (q->flags.q.subroutine_def) {
1055 printf("subroutine (");
1056 q->subroutine_list->print();
1057 printf(")");
1058 }
1059
1060 if (q->flags.q.constant)
1061 printf("const ");
1062
1063 if (q->flags.q.invariant)
1064 printf("invariant ");
1065
1066 if (q->flags.q.attribute)
1067 printf("attribute ");
1068
1069 if (q->flags.q.varying)
1070 printf("varying ");
1071
1072 if (q->flags.q.in && q->flags.q.out)
1073 printf("inout ");
1074 else {
1075 if (q->flags.q.in)
1076 printf("in ");
1077
1078 if (q->flags.q.out)
1079 printf("out ");
1080 }
1081
1082 if (q->flags.q.centroid)
1083 printf("centroid ");
1084 if (q->flags.q.sample)
1085 printf("sample ");
1086 if (q->flags.q.patch)
1087 printf("patch ");
1088 if (q->flags.q.uniform)
1089 printf("uniform ");
1090 if (q->flags.q.buffer)
1091 printf("buffer ");
1092 if (q->flags.q.smooth)
1093 printf("smooth ");
1094 if (q->flags.q.flat)
1095 printf("flat ");
1096 if (q->flags.q.noperspective)
1097 printf("noperspective ");
1098 }
1099
1100
1101 void
1102 ast_node::print(void) const
1103 {
1104 printf("unhandled node ");
1105 }
1106
1107
1108 ast_node::ast_node(void)
1109 {
1110 this->location.source = 0;
1111 this->location.first_line = 0;
1112 this->location.first_column = 0;
1113 this->location.last_line = 0;
1114 this->location.last_column = 0;
1115 }
1116
1117
1118 static void
1119 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1120 {
1121 if (array_specifier)
1122 array_specifier->print();
1123 }
1124
1125
1126 void
1127 ast_compound_statement::print(void) const
1128 {
1129 printf("{\n");
1130
1131 foreach_list_typed(ast_node, ast, link, &this->statements) {
1132 ast->print();
1133 }
1134
1135 printf("}\n");
1136 }
1137
1138
1139 ast_compound_statement::ast_compound_statement(int new_scope,
1140 ast_node *statements)
1141 {
1142 this->new_scope = new_scope;
1143
1144 if (statements != NULL) {
1145 this->statements.push_degenerate_list_at_head(&statements->link);
1146 }
1147 }
1148
1149
1150 void
1151 ast_expression::print(void) const
1152 {
1153 switch (oper) {
1154 case ast_assign:
1155 case ast_mul_assign:
1156 case ast_div_assign:
1157 case ast_mod_assign:
1158 case ast_add_assign:
1159 case ast_sub_assign:
1160 case ast_ls_assign:
1161 case ast_rs_assign:
1162 case ast_and_assign:
1163 case ast_xor_assign:
1164 case ast_or_assign:
1165 subexpressions[0]->print();
1166 printf("%s ", operator_string(oper));
1167 subexpressions[1]->print();
1168 break;
1169
1170 case ast_field_selection:
1171 subexpressions[0]->print();
1172 printf(". %s ", primary_expression.identifier);
1173 break;
1174
1175 case ast_plus:
1176 case ast_neg:
1177 case ast_bit_not:
1178 case ast_logic_not:
1179 case ast_pre_inc:
1180 case ast_pre_dec:
1181 printf("%s ", operator_string(oper));
1182 subexpressions[0]->print();
1183 break;
1184
1185 case ast_post_inc:
1186 case ast_post_dec:
1187 subexpressions[0]->print();
1188 printf("%s ", operator_string(oper));
1189 break;
1190
1191 case ast_conditional:
1192 subexpressions[0]->print();
1193 printf("? ");
1194 subexpressions[1]->print();
1195 printf(": ");
1196 subexpressions[2]->print();
1197 break;
1198
1199 case ast_array_index:
1200 subexpressions[0]->print();
1201 printf("[ ");
1202 subexpressions[1]->print();
1203 printf("] ");
1204 break;
1205
1206 case ast_function_call: {
1207 subexpressions[0]->print();
1208 printf("( ");
1209
1210 foreach_list_typed (ast_node, ast, link, &this->expressions) {
1211 if (&ast->link != this->expressions.get_head())
1212 printf(", ");
1213
1214 ast->print();
1215 }
1216
1217 printf(") ");
1218 break;
1219 }
1220
1221 case ast_identifier:
1222 printf("%s ", primary_expression.identifier);
1223 break;
1224
1225 case ast_int_constant:
1226 printf("%d ", primary_expression.int_constant);
1227 break;
1228
1229 case ast_uint_constant:
1230 printf("%u ", primary_expression.uint_constant);
1231 break;
1232
1233 case ast_float_constant:
1234 printf("%f ", primary_expression.float_constant);
1235 break;
1236
1237 case ast_double_constant:
1238 printf("%f ", primary_expression.double_constant);
1239 break;
1240
1241 case ast_bool_constant:
1242 printf("%s ",
1243 primary_expression.bool_constant
1244 ? "true" : "false");
1245 break;
1246
1247 case ast_sequence: {
1248 printf("( ");
1249 foreach_list_typed (ast_node, ast, link, & this->expressions) {
1250 if (&ast->link != this->expressions.get_head())
1251 printf(", ");
1252
1253 ast->print();
1254 }
1255 printf(") ");
1256 break;
1257 }
1258
1259 case ast_aggregate: {
1260 printf("{ ");
1261 foreach_list_typed (ast_node, ast, link, & this->expressions) {
1262 if (&ast->link != this->expressions.get_head())
1263 printf(", ");
1264
1265 ast->print();
1266 }
1267 printf("} ");
1268 break;
1269 }
1270
1271 default:
1272 assert(0);
1273 break;
1274 }
1275 }
1276
1277 ast_expression::ast_expression(int oper,
1278 ast_expression *ex0,
1279 ast_expression *ex1,
1280 ast_expression *ex2) :
1281 primary_expression()
1282 {
1283 this->oper = ast_operators(oper);
1284 this->subexpressions[0] = ex0;
1285 this->subexpressions[1] = ex1;
1286 this->subexpressions[2] = ex2;
1287 this->non_lvalue_description = NULL;
1288 this->is_lhs = false;
1289 }
1290
1291
1292 void
1293 ast_expression_statement::print(void) const
1294 {
1295 if (expression)
1296 expression->print();
1297
1298 printf("; ");
1299 }
1300
1301
1302 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1303 expression(ex)
1304 {
1305 /* empty */
1306 }
1307
1308
1309 void
1310 ast_function::print(void) const
1311 {
1312 return_type->print();
1313 printf(" %s (", identifier);
1314
1315 foreach_list_typed(ast_node, ast, link, & this->parameters) {
1316 ast->print();
1317 }
1318
1319 printf(")");
1320 }
1321
1322
1323 ast_function::ast_function(void)
1324 : return_type(NULL), identifier(NULL), is_definition(false),
1325 signature(NULL)
1326 {
1327 /* empty */
1328 }
1329
1330
1331 void
1332 ast_fully_specified_type::print(void) const
1333 {
1334 _mesa_ast_type_qualifier_print(& qualifier);
1335 specifier->print();
1336 }
1337
1338
1339 void
1340 ast_parameter_declarator::print(void) const
1341 {
1342 type->print();
1343 if (identifier)
1344 printf("%s ", identifier);
1345 ast_opt_array_dimensions_print(array_specifier);
1346 }
1347
1348
1349 void
1350 ast_function_definition::print(void) const
1351 {
1352 prototype->print();
1353 body->print();
1354 }
1355
1356
1357 void
1358 ast_declaration::print(void) const
1359 {
1360 printf("%s ", identifier);
1361 ast_opt_array_dimensions_print(array_specifier);
1362
1363 if (initializer) {
1364 printf("= ");
1365 initializer->print();
1366 }
1367 }
1368
1369
1370 ast_declaration::ast_declaration(const char *identifier,
1371 ast_array_specifier *array_specifier,
1372 ast_expression *initializer)
1373 {
1374 this->identifier = identifier;
1375 this->array_specifier = array_specifier;
1376 this->initializer = initializer;
1377 }
1378
1379
1380 void
1381 ast_declarator_list::print(void) const
1382 {
1383 assert(type || invariant);
1384
1385 if (type)
1386 type->print();
1387 else if (invariant)
1388 printf("invariant ");
1389 else
1390 printf("precise ");
1391
1392 foreach_list_typed (ast_node, ast, link, & this->declarations) {
1393 if (&ast->link != this->declarations.get_head())
1394 printf(", ");
1395
1396 ast->print();
1397 }
1398
1399 printf("; ");
1400 }
1401
1402
1403 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1404 {
1405 this->type = type;
1406 this->invariant = false;
1407 this->precise = false;
1408 }
1409
1410 void
1411 ast_jump_statement::print(void) const
1412 {
1413 switch (mode) {
1414 case ast_continue:
1415 printf("continue; ");
1416 break;
1417 case ast_break:
1418 printf("break; ");
1419 break;
1420 case ast_return:
1421 printf("return ");
1422 if (opt_return_value)
1423 opt_return_value->print();
1424
1425 printf("; ");
1426 break;
1427 case ast_discard:
1428 printf("discard; ");
1429 break;
1430 }
1431 }
1432
1433
1434 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1435 : opt_return_value(NULL)
1436 {
1437 this->mode = ast_jump_modes(mode);
1438
1439 if (mode == ast_return)
1440 opt_return_value = return_value;
1441 }
1442
1443
1444 void
1445 ast_selection_statement::print(void) const
1446 {
1447 printf("if ( ");
1448 condition->print();
1449 printf(") ");
1450
1451 then_statement->print();
1452
1453 if (else_statement) {
1454 printf("else ");
1455 else_statement->print();
1456 }
1457 }
1458
1459
1460 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1461 ast_node *then_statement,
1462 ast_node *else_statement)
1463 {
1464 this->condition = condition;
1465 this->then_statement = then_statement;
1466 this->else_statement = else_statement;
1467 }
1468
1469
1470 void
1471 ast_switch_statement::print(void) const
1472 {
1473 printf("switch ( ");
1474 test_expression->print();
1475 printf(") ");
1476
1477 body->print();
1478 }
1479
1480
1481 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1482 ast_node *body)
1483 {
1484 this->test_expression = test_expression;
1485 this->body = body;
1486 }
1487
1488
1489 void
1490 ast_switch_body::print(void) const
1491 {
1492 printf("{\n");
1493 if (stmts != NULL) {
1494 stmts->print();
1495 }
1496 printf("}\n");
1497 }
1498
1499
1500 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1501 {
1502 this->stmts = stmts;
1503 }
1504
1505
1506 void ast_case_label::print(void) const
1507 {
1508 if (test_value != NULL) {
1509 printf("case ");
1510 test_value->print();
1511 printf(": ");
1512 } else {
1513 printf("default: ");
1514 }
1515 }
1516
1517
1518 ast_case_label::ast_case_label(ast_expression *test_value)
1519 {
1520 this->test_value = test_value;
1521 }
1522
1523
1524 void ast_case_label_list::print(void) const
1525 {
1526 foreach_list_typed(ast_node, ast, link, & this->labels) {
1527 ast->print();
1528 }
1529 printf("\n");
1530 }
1531
1532
1533 ast_case_label_list::ast_case_label_list(void)
1534 {
1535 }
1536
1537
1538 void ast_case_statement::print(void) const
1539 {
1540 labels->print();
1541 foreach_list_typed(ast_node, ast, link, & this->stmts) {
1542 ast->print();
1543 printf("\n");
1544 }
1545 }
1546
1547
1548 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1549 {
1550 this->labels = labels;
1551 }
1552
1553
1554 void ast_case_statement_list::print(void) const
1555 {
1556 foreach_list_typed(ast_node, ast, link, & this->cases) {
1557 ast->print();
1558 }
1559 }
1560
1561
1562 ast_case_statement_list::ast_case_statement_list(void)
1563 {
1564 }
1565
1566
1567 void
1568 ast_iteration_statement::print(void) const
1569 {
1570 switch (mode) {
1571 case ast_for:
1572 printf("for( ");
1573 if (init_statement)
1574 init_statement->print();
1575 printf("; ");
1576
1577 if (condition)
1578 condition->print();
1579 printf("; ");
1580
1581 if (rest_expression)
1582 rest_expression->print();
1583 printf(") ");
1584
1585 body->print();
1586 break;
1587
1588 case ast_while:
1589 printf("while ( ");
1590 if (condition)
1591 condition->print();
1592 printf(") ");
1593 body->print();
1594 break;
1595
1596 case ast_do_while:
1597 printf("do ");
1598 body->print();
1599 printf("while ( ");
1600 if (condition)
1601 condition->print();
1602 printf("); ");
1603 break;
1604 }
1605 }
1606
1607
1608 ast_iteration_statement::ast_iteration_statement(int mode,
1609 ast_node *init,
1610 ast_node *condition,
1611 ast_expression *rest_expression,
1612 ast_node *body)
1613 {
1614 this->mode = ast_iteration_modes(mode);
1615 this->init_statement = init;
1616 this->condition = condition;
1617 this->rest_expression = rest_expression;
1618 this->body = body;
1619 }
1620
1621
1622 void
1623 ast_struct_specifier::print(void) const
1624 {
1625 printf("struct %s { ", name);
1626 foreach_list_typed(ast_node, ast, link, &this->declarations) {
1627 ast->print();
1628 }
1629 printf("} ");
1630 }
1631
1632
1633 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1634 ast_declarator_list *declarator_list)
1635 {
1636 if (identifier == NULL) {
1637 static mtx_t mutex = _MTX_INITIALIZER_NP;
1638 static unsigned anon_count = 1;
1639 unsigned count;
1640
1641 mtx_lock(&mutex);
1642 count = anon_count++;
1643 mtx_unlock(&mutex);
1644
1645 identifier = ralloc_asprintf(this, "#anon_struct_%04x", count);
1646 }
1647 name = identifier;
1648 this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1649 is_declaration = true;
1650 layout = NULL;
1651 }
1652
1653 void ast_subroutine_list::print(void) const
1654 {
1655 foreach_list_typed (ast_node, ast, link, & this->declarations) {
1656 if (&ast->link != this->declarations.get_head())
1657 printf(", ");
1658 ast->print();
1659 }
1660 }
1661
1662 static void
1663 set_shader_inout_layout(struct gl_shader *shader,
1664 struct _mesa_glsl_parse_state *state)
1665 {
1666 /* Should have been prevented by the parser. */
1667 if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1668 shader->Stage == MESA_SHADER_VERTEX) {
1669 assert(!state->in_qualifier->flags.i);
1670 } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1671 shader->Stage != MESA_SHADER_TESS_EVAL) {
1672 assert(!state->in_qualifier->flags.i);
1673 }
1674
1675 if (shader->Stage != MESA_SHADER_COMPUTE) {
1676 /* Should have been prevented by the parser. */
1677 assert(!state->cs_input_local_size_specified);
1678 }
1679
1680 if (shader->Stage != MESA_SHADER_FRAGMENT) {
1681 /* Should have been prevented by the parser. */
1682 assert(!state->fs_uses_gl_fragcoord);
1683 assert(!state->fs_redeclares_gl_fragcoord);
1684 assert(!state->fs_pixel_center_integer);
1685 assert(!state->fs_origin_upper_left);
1686 assert(!state->fs_early_fragment_tests);
1687 }
1688
1689 for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1690 if (state->out_qualifier->out_xfb_stride[i]) {
1691 unsigned xfb_stride;
1692 if (state->out_qualifier->out_xfb_stride[i]->
1693 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1694 true)) {
1695 shader->info.TransformFeedback.BufferStride[i] = xfb_stride;
1696 }
1697 }
1698 }
1699
1700 switch (shader->Stage) {
1701 case MESA_SHADER_TESS_CTRL:
1702 shader->info.TessCtrl.VerticesOut = 0;
1703 if (state->tcs_output_vertices_specified) {
1704 unsigned vertices;
1705 if (state->out_qualifier->vertices->
1706 process_qualifier_constant(state, "vertices", &vertices,
1707 false)) {
1708
1709 YYLTYPE loc = state->out_qualifier->vertices->get_location();
1710 if (vertices > state->Const.MaxPatchVertices) {
1711 _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1712 "GL_MAX_PATCH_VERTICES", vertices);
1713 }
1714 shader->info.TessCtrl.VerticesOut = vertices;
1715 }
1716 }
1717 break;
1718 case MESA_SHADER_TESS_EVAL:
1719 shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1720 if (state->in_qualifier->flags.q.prim_type)
1721 shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1722
1723 shader->info.TessEval.Spacing = 0;
1724 if (state->in_qualifier->flags.q.vertex_spacing)
1725 shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1726
1727 shader->info.TessEval.VertexOrder = 0;
1728 if (state->in_qualifier->flags.q.ordering)
1729 shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1730
1731 shader->info.TessEval.PointMode = -1;
1732 if (state->in_qualifier->flags.q.point_mode)
1733 shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1734 break;
1735 case MESA_SHADER_GEOMETRY:
1736 shader->info.Geom.VerticesOut = -1;
1737 if (state->out_qualifier->flags.q.max_vertices) {
1738 unsigned qual_max_vertices;
1739 if (state->out_qualifier->max_vertices->
1740 process_qualifier_constant(state, "max_vertices",
1741 &qual_max_vertices, true, true)) {
1742
1743 if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1744 YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1745 _mesa_glsl_error(&loc, state,
1746 "maximum output vertices (%d) exceeds "
1747 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1748 qual_max_vertices);
1749 }
1750 shader->info.Geom.VerticesOut = qual_max_vertices;
1751 }
1752 }
1753
1754 if (state->gs_input_prim_type_specified) {
1755 shader->info.Geom.InputType = state->in_qualifier->prim_type;
1756 } else {
1757 shader->info.Geom.InputType = PRIM_UNKNOWN;
1758 }
1759
1760 if (state->out_qualifier->flags.q.prim_type) {
1761 shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1762 } else {
1763 shader->info.Geom.OutputType = PRIM_UNKNOWN;
1764 }
1765
1766 shader->info.Geom.Invocations = 0;
1767 if (state->in_qualifier->flags.q.invocations) {
1768 unsigned invocations;
1769 if (state->in_qualifier->invocations->
1770 process_qualifier_constant(state, "invocations",
1771 &invocations, false)) {
1772
1773 YYLTYPE loc = state->in_qualifier->invocations->get_location();
1774 if (invocations > MAX_GEOMETRY_SHADER_INVOCATIONS) {
1775 _mesa_glsl_error(&loc, state,
1776 "invocations (%d) exceeds "
1777 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1778 invocations);
1779 }
1780 shader->info.Geom.Invocations = invocations;
1781 }
1782 }
1783 break;
1784
1785 case MESA_SHADER_COMPUTE:
1786 if (state->cs_input_local_size_specified) {
1787 for (int i = 0; i < 3; i++)
1788 shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1789 } else {
1790 for (int i = 0; i < 3; i++)
1791 shader->info.Comp.LocalSize[i] = 0;
1792 }
1793 break;
1794
1795 case MESA_SHADER_FRAGMENT:
1796 shader->info.redeclares_gl_fragcoord =
1797 state->fs_redeclares_gl_fragcoord;
1798 shader->info.uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1799 shader->info.pixel_center_integer = state->fs_pixel_center_integer;
1800 shader->info.origin_upper_left = state->fs_origin_upper_left;
1801 shader->info.ARB_fragment_coord_conventions_enable =
1802 state->ARB_fragment_coord_conventions_enable;
1803 shader->info.EarlyFragmentTests = state->fs_early_fragment_tests;
1804 shader->info.BlendSupport = state->fs_blend_support;
1805 break;
1806
1807 default:
1808 /* Nothing to do. */
1809 break;
1810 }
1811 }
1812
1813 extern "C" {
1814
1815 static void
1816 assign_subroutine_indexes(struct gl_shader *sh,
1817 struct _mesa_glsl_parse_state *state)
1818 {
1819 int j, k;
1820 int index = 0;
1821
1822 for (j = 0; j < state->num_subroutines; j++) {
1823 while (state->subroutines[j]->subroutine_index == -1) {
1824 for (k = 0; k < state->num_subroutines; k++) {
1825 if (state->subroutines[k]->subroutine_index == index)
1826 break;
1827 else if (k == state->num_subroutines - 1) {
1828 state->subroutines[j]->subroutine_index = index;
1829 }
1830 }
1831 index++;
1832 }
1833 }
1834 }
1835
1836 static void
1837 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1838 void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1839 struct glcpp_parser *data,
1840 unsigned version,
1841 bool es)
1842 {
1843 unsigned gl_version = state->ctx->Extensions.Version;
1844 gl_api api = state->ctx->API;
1845
1846 if (gl_version != 0xff) {
1847 unsigned i;
1848 for (i = 0; i < state->num_supported_versions; i++) {
1849 if (state->supported_versions[i].ver == version &&
1850 state->supported_versions[i].es == es) {
1851 gl_version = state->supported_versions[i].gl_ver;
1852 break;
1853 }
1854 }
1855
1856 if (i == state->num_supported_versions)
1857 return;
1858 }
1859
1860 if (es)
1861 api = API_OPENGLES2;
1862
1863 for (unsigned i = 0;
1864 i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
1865 const _mesa_glsl_extension *extension
1866 = &_mesa_glsl_supported_extensions[i];
1867 if (extension->compatible_with_state(state, api, gl_version)) {
1868 add_builtin_define(data, extension->name, 1);
1869 }
1870 }
1871 }
1872
1873 void
1874 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
1875 bool dump_ast, bool dump_hir)
1876 {
1877 struct _mesa_glsl_parse_state *state =
1878 new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
1879 const char *source = shader->Source;
1880
1881 if (ctx->Const.GenerateTemporaryNames)
1882 (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
1883 false, true);
1884
1885 state->error = glcpp_preprocess(state, &source, &state->info_log,
1886 add_builtin_defines, state, ctx);
1887
1888 if (!state->error) {
1889 _mesa_glsl_lexer_ctor(state, source);
1890 _mesa_glsl_parse(state);
1891 _mesa_glsl_lexer_dtor(state);
1892 }
1893
1894 if (dump_ast) {
1895 foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
1896 ast->print();
1897 }
1898 printf("\n\n");
1899 }
1900
1901 ralloc_free(shader->ir);
1902 shader->ir = new(shader) exec_list;
1903 if (!state->error && !state->translation_unit.is_empty())
1904 _mesa_ast_to_hir(shader->ir, state);
1905
1906 if (!state->error) {
1907 validate_ir_tree(shader->ir);
1908
1909 /* Print out the unoptimized IR. */
1910 if (dump_hir) {
1911 _mesa_print_ir(stdout, shader->ir, state);
1912 }
1913 }
1914
1915
1916 if (!state->error && !shader->ir->is_empty()) {
1917 struct gl_shader_compiler_options *options =
1918 &ctx->Const.ShaderCompilerOptions[shader->Stage];
1919
1920 assign_subroutine_indexes(shader, state);
1921 lower_subroutine(shader->ir, state);
1922 /* Do some optimization at compile time to reduce shader IR size
1923 * and reduce later work if the same shader is linked multiple times
1924 */
1925 while (do_common_optimization(shader->ir, false, false, options,
1926 ctx->Const.NativeIntegers))
1927 ;
1928
1929 validate_ir_tree(shader->ir);
1930
1931 enum ir_variable_mode other;
1932 switch (shader->Stage) {
1933 case MESA_SHADER_VERTEX:
1934 other = ir_var_shader_in;
1935 break;
1936 case MESA_SHADER_FRAGMENT:
1937 other = ir_var_shader_out;
1938 break;
1939 default:
1940 /* Something invalid to ensure optimize_dead_builtin_uniforms
1941 * doesn't remove anything other than uniforms or constants.
1942 */
1943 other = ir_var_mode_count;
1944 break;
1945 }
1946
1947 optimize_dead_builtin_variables(shader->ir, other);
1948
1949 validate_ir_tree(shader->ir);
1950 }
1951
1952 if (shader->InfoLog)
1953 ralloc_free(shader->InfoLog);
1954
1955 if (!state->error)
1956 set_shader_inout_layout(shader, state);
1957
1958 shader->symbols = new(shader->ir) glsl_symbol_table;
1959 shader->CompileStatus = !state->error;
1960 shader->InfoLog = state->info_log;
1961 shader->Version = state->language_version;
1962 shader->IsES = state->es_shader;
1963 shader->info.uses_builtin_functions = state->uses_builtin_functions;
1964
1965 /* Retain any live IR, but trash the rest. */
1966 reparent_ir(shader->ir, shader->ir);
1967
1968 /* Destroy the symbol table. Create a new symbol table that contains only
1969 * the variables and functions that still exist in the IR. The symbol
1970 * table will be used later during linking.
1971 *
1972 * There must NOT be any freed objects still referenced by the symbol
1973 * table. That could cause the linker to dereference freed memory.
1974 *
1975 * We don't have to worry about types or interface-types here because those
1976 * are fly-weights that are looked up by glsl_type.
1977 */
1978 foreach_in_list (ir_instruction, ir, shader->ir) {
1979 switch (ir->ir_type) {
1980 case ir_type_function:
1981 shader->symbols->add_function((ir_function *) ir);
1982 break;
1983 case ir_type_variable: {
1984 ir_variable *const var = (ir_variable *) ir;
1985
1986 if (var->data.mode != ir_var_temporary)
1987 shader->symbols->add_variable(var);
1988 break;
1989 }
1990 default:
1991 break;
1992 }
1993 }
1994
1995 _mesa_glsl_initialize_derived_variables(ctx, shader);
1996
1997 delete state->symbols;
1998 ralloc_free(state);
1999 }
2000
2001 } /* extern "C" */
2002 /**
2003 * Do the set of common optimizations passes
2004 *
2005 * \param ir List of instructions to be optimized
2006 * \param linked Is the shader linked? This enables
2007 * optimizations passes that remove code at
2008 * global scope and could cause linking to
2009 * fail.
2010 * \param uniform_locations_assigned Have locations already been assigned for
2011 * uniforms? This prevents the declarations
2012 * of unused uniforms from being removed.
2013 * The setting of this flag only matters if
2014 * \c linked is \c true.
2015 * \param options The driver's preferred shader options.
2016 * \param native_integers Selects optimizations that depend on the
2017 * implementations supporting integers
2018 * natively (as opposed to supporting
2019 * integers in floating point registers).
2020 */
2021 bool
2022 do_common_optimization(exec_list *ir, bool linked,
2023 bool uniform_locations_assigned,
2024 const struct gl_shader_compiler_options *options,
2025 bool native_integers)
2026 {
2027 const bool debug = false;
2028 GLboolean progress = GL_FALSE;
2029
2030 #define OPT(PASS, ...) do { \
2031 if (debug) { \
2032 fprintf(stderr, "START GLSL optimization %s\n", #PASS); \
2033 const bool opt_progress = PASS(__VA_ARGS__); \
2034 progress = opt_progress || progress; \
2035 if (opt_progress) \
2036 _mesa_print_ir(stderr, ir, NULL); \
2037 fprintf(stderr, "GLSL optimization %s: %s progress\n", \
2038 #PASS, opt_progress ? "made" : "no"); \
2039 } else { \
2040 progress = PASS(__VA_ARGS__) || progress; \
2041 } \
2042 } while (false)
2043
2044 OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2045
2046 if (linked) {
2047 OPT(do_function_inlining, ir);
2048 OPT(do_dead_functions, ir);
2049 OPT(do_structure_splitting, ir);
2050 }
2051 propagate_invariance(ir);
2052 OPT(do_if_simplification, ir);
2053 OPT(opt_flatten_nested_if_blocks, ir);
2054 OPT(opt_conditional_discard, ir);
2055 OPT(do_copy_propagation, ir);
2056 OPT(do_copy_propagation_elements, ir);
2057
2058 if (options->OptimizeForAOS && !linked)
2059 OPT(opt_flip_matrices, ir);
2060
2061 if (linked && options->OptimizeForAOS) {
2062 OPT(do_vectorize, ir);
2063 }
2064
2065 if (linked)
2066 OPT(do_dead_code, ir, uniform_locations_assigned);
2067 else
2068 OPT(do_dead_code_unlinked, ir);
2069 OPT(do_dead_code_local, ir);
2070 OPT(do_tree_grafting, ir);
2071 OPT(do_constant_propagation, ir);
2072 if (linked)
2073 OPT(do_constant_variable, ir);
2074 else
2075 OPT(do_constant_variable_unlinked, ir);
2076 OPT(do_constant_folding, ir);
2077 OPT(do_minmax_prune, ir);
2078 OPT(do_rebalance_tree, ir);
2079 OPT(do_algebraic, ir, native_integers, options);
2080 OPT(do_lower_jumps, ir);
2081 OPT(do_vec_index_to_swizzle, ir);
2082 OPT(lower_vector_insert, ir, false);
2083 OPT(do_swizzle_swizzle, ir);
2084 OPT(do_noop_swizzle, ir);
2085
2086 OPT(optimize_split_arrays, ir, linked);
2087 OPT(optimize_redundant_jumps, ir);
2088
2089 loop_state *ls = analyze_loop_variables(ir);
2090 if (ls->loop_found) {
2091 OPT(set_loop_controls, ir, ls);
2092 OPT(unroll_loops, ir, ls, options);
2093 }
2094 delete ls;
2095
2096 #undef OPT
2097
2098 return progress;
2099 }
2100
2101 extern "C" {
2102
2103 /**
2104 * To be called at GL teardown time, this frees compiler datastructures.
2105 *
2106 * After calling this, any previously compiled shaders and shader
2107 * programs would be invalid. So this should happen at approximately
2108 * program exit.
2109 */
2110 void
2111 _mesa_destroy_shader_compiler(void)
2112 {
2113 _mesa_destroy_shader_compiler_caches();
2114
2115 _mesa_glsl_release_types();
2116 }
2117
2118 /**
2119 * Releases compiler caches to trade off performance for memory.
2120 *
2121 * Intended to be used with glReleaseShaderCompiler().
2122 */
2123 void
2124 _mesa_destroy_shader_compiler_caches(void)
2125 {
2126 _mesa_glsl_release_builtin_functions();
2127 }
2128
2129 }