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 <inttypes.h> /* for PRIx64 macro */
24 #include <stdio.h>
25 #include <stdarg.h>
26 #include <string.h>
27 #include <assert.h>
28
29 #include "main/context.h"
30 #include "main/debug_output.h"
31 #include "main/formats.h"
32 #include "main/shaderobj.h"
33 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
34 #include "util/ralloc.h"
35 #include "util/disk_cache.h"
36 #include "util/mesa-sha1.h"
37 #include "ast.h"
38 #include "glsl_parser_extras.h"
39 #include "glsl_parser.h"
40 #include "ir_optimization.h"
41 #include "loop_analysis.h"
42 #include "builtin_functions.h"
43
44 /**
45 * Format a short human-readable description of the given GLSL version.
46 */
47 const char *
glsl_compute_version_string(void * mem_ctx,bool is_es,unsigned version)48 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
49 {
50 return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
51 version / 100, version % 100);
52 }
53
54
55 static const unsigned known_desktop_glsl_versions[] =
56 { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450, 460 };
57 static const unsigned known_desktop_gl_versions[] =
58 { 20, 21, 30, 31, 32, 33, 40, 41, 42, 43, 44, 45, 46 };
59
60
_mesa_glsl_parse_state(struct gl_context * _ctx,gl_shader_stage stage,void * mem_ctx)61 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
62 gl_shader_stage stage,
63 void *mem_ctx)
64 : ctx(_ctx), cs_input_local_size_specified(false), cs_input_local_size(),
65 switch_state(), warnings_enabled(true)
66 {
67 assert(stage < MESA_SHADER_STAGES);
68 this->stage = stage;
69
70 this->scanner = NULL;
71 this->translation_unit.make_empty();
72 this->symbols = new(mem_ctx) glsl_symbol_table;
73
74 this->linalloc = linear_alloc_parent(this, 0);
75
76 this->info_log = ralloc_strdup(mem_ctx, "");
77 this->error = false;
78 this->loop_nesting_ast = NULL;
79
80 this->uses_builtin_functions = false;
81
82 /* Set default language version and extensions */
83 this->language_version = 110;
84 this->forced_language_version = ctx->Const.ForceGLSLVersion;
85 if (ctx->Const.GLSLZeroInit == 1) {
86 this->zero_init = (1u << ir_var_auto) | (1u << ir_var_temporary) | (1u << ir_var_shader_out);
87 } else if (ctx->Const.GLSLZeroInit == 2) {
88 this->zero_init = (1u << ir_var_auto) | (1u << ir_var_temporary) | (1u << ir_var_function_out);
89 } else {
90 this->zero_init = 0;
91 }
92 this->gl_version = 20;
93 this->compat_shader = true;
94 this->es_shader = false;
95 this->ARB_texture_rectangle_enable = true;
96
97 /* OpenGL ES 2.0 has different defaults from desktop GL. */
98 if (ctx->API == API_OPENGLES2) {
99 this->language_version = 100;
100 this->es_shader = true;
101 this->ARB_texture_rectangle_enable = false;
102 }
103
104 this->extensions = &ctx->Extensions;
105
106 this->Const.MaxLights = ctx->Const.MaxLights;
107 this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
108 this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
109 this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
110 this->Const.MaxVertexAttribs = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs;
111 this->Const.MaxVertexUniformComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxUniformComponents;
112 this->Const.MaxVertexTextureImageUnits = ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits;
113 this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
114 this->Const.MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
115 this->Const.MaxFragmentUniformComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxUniformComponents;
116 this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset;
117 this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset;
118
119 this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
120
121 this->Const.MaxDualSourceDrawBuffers = ctx->Const.MaxDualSourceDrawBuffers;
122
123 /* 1.50 constants */
124 this->Const.MaxVertexOutputComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents;
125 this->Const.MaxGeometryInputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxInputComponents;
126 this->Const.MaxGeometryOutputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxOutputComponents;
127 this->Const.MaxGeometryShaderInvocations = ctx->Const.MaxGeometryShaderInvocations;
128 this->Const.MaxFragmentInputComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents;
129 this->Const.MaxGeometryTextureImageUnits = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits;
130 this->Const.MaxGeometryOutputVertices = ctx->Const.MaxGeometryOutputVertices;
131 this->Const.MaxGeometryTotalOutputComponents = ctx->Const.MaxGeometryTotalOutputComponents;
132 this->Const.MaxGeometryUniformComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxUniformComponents;
133
134 this->Const.MaxVertexAtomicCounters = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicCounters;
135 this->Const.MaxTessControlAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters;
136 this->Const.MaxTessEvaluationAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicCounters;
137 this->Const.MaxGeometryAtomicCounters = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicCounters;
138 this->Const.MaxFragmentAtomicCounters = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
139 this->Const.MaxComputeAtomicCounters = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicCounters;
140 this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
141 this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
142 this->Const.MaxVertexAtomicCounterBuffers =
143 ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicBuffers;
144 this->Const.MaxTessControlAtomicCounterBuffers =
145 ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers;
146 this->Const.MaxTessEvaluationAtomicCounterBuffers =
147 ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers;
148 this->Const.MaxGeometryAtomicCounterBuffers =
149 ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers;
150 this->Const.MaxFragmentAtomicCounterBuffers =
151 ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
152 this->Const.MaxComputeAtomicCounterBuffers =
153 ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers;
154 this->Const.MaxCombinedAtomicCounterBuffers =
155 ctx->Const.MaxCombinedAtomicBuffers;
156 this->Const.MaxAtomicCounterBufferSize =
157 ctx->Const.MaxAtomicBufferSize;
158
159 /* ARB_enhanced_layouts constants */
160 this->Const.MaxTransformFeedbackBuffers = ctx->Const.MaxTransformFeedbackBuffers;
161 this->Const.MaxTransformFeedbackInterleavedComponents = ctx->Const.MaxTransformFeedbackInterleavedComponents;
162
163 /* Compute shader constants */
164 for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupCount); i++)
165 this->Const.MaxComputeWorkGroupCount[i] = ctx->Const.MaxComputeWorkGroupCount[i];
166 for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupSize); i++)
167 this->Const.MaxComputeWorkGroupSize[i] = ctx->Const.MaxComputeWorkGroupSize[i];
168
169 this->Const.MaxComputeTextureImageUnits = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
170 this->Const.MaxComputeUniformComponents = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxUniformComponents;
171
172 this->Const.MaxImageUnits = ctx->Const.MaxImageUnits;
173 this->Const.MaxCombinedShaderOutputResources = ctx->Const.MaxCombinedShaderOutputResources;
174 this->Const.MaxImageSamples = ctx->Const.MaxImageSamples;
175 this->Const.MaxVertexImageUniforms = ctx->Const.Program[MESA_SHADER_VERTEX].MaxImageUniforms;
176 this->Const.MaxTessControlImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms;
177 this->Const.MaxTessEvaluationImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms;
178 this->Const.MaxGeometryImageUniforms = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxImageUniforms;
179 this->Const.MaxFragmentImageUniforms = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxImageUniforms;
180 this->Const.MaxComputeImageUniforms = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
181 this->Const.MaxCombinedImageUniforms = ctx->Const.MaxCombinedImageUniforms;
182
183 /* ARB_viewport_array */
184 this->Const.MaxViewports = ctx->Const.MaxViewports;
185
186 /* tessellation shader constants */
187 this->Const.MaxPatchVertices = ctx->Const.MaxPatchVertices;
188 this->Const.MaxTessGenLevel = ctx->Const.MaxTessGenLevel;
189 this->Const.MaxTessControlInputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents;
190 this->Const.MaxTessControlOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents;
191 this->Const.MaxTessControlTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits;
192 this->Const.MaxTessEvaluationInputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents;
193 this->Const.MaxTessEvaluationOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents;
194 this->Const.MaxTessEvaluationTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits;
195 this->Const.MaxTessPatchComponents = ctx->Const.MaxTessPatchComponents;
196 this->Const.MaxTessControlTotalOutputComponents = ctx->Const.MaxTessControlTotalOutputComponents;
197 this->Const.MaxTessControlUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents;
198 this->Const.MaxTessEvaluationUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents;
199
200 /* GL 4.5 / OES_sample_variables */
201 this->Const.MaxSamples = ctx->Const.MaxSamples;
202
203 this->current_function = NULL;
204 this->toplevel_ir = NULL;
205 this->found_return = false;
206 this->found_begin_interlock = false;
207 this->found_end_interlock = false;
208 this->all_invariant = false;
209 this->user_structures = NULL;
210 this->num_user_structures = 0;
211 this->num_subroutines = 0;
212 this->subroutines = NULL;
213 this->num_subroutine_types = 0;
214 this->subroutine_types = NULL;
215
216 /* supported_versions should be large enough to support the known desktop
217 * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
218 */
219 STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 4) ==
220 ARRAY_SIZE(this->supported_versions));
221
222 /* Populate the list of supported GLSL versions */
223 /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
224 * the OpenGL 3.2 Core context is supported, this logic will need
225 * change. Older versions of GLSL are no longer supported
226 * outside the compatibility contexts of 3.x.
227 */
228 this->num_supported_versions = 0;
229 if (_mesa_is_desktop_gl(ctx)) {
230 for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
231 if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
232 this->supported_versions[this->num_supported_versions].ver
233 = known_desktop_glsl_versions[i];
234 this->supported_versions[this->num_supported_versions].gl_ver
235 = known_desktop_gl_versions[i];
236 this->supported_versions[this->num_supported_versions].es = false;
237 this->num_supported_versions++;
238 }
239 }
240 }
241 if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
242 this->supported_versions[this->num_supported_versions].ver = 100;
243 this->supported_versions[this->num_supported_versions].gl_ver = 20;
244 this->supported_versions[this->num_supported_versions].es = true;
245 this->num_supported_versions++;
246 }
247 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
248 this->supported_versions[this->num_supported_versions].ver = 300;
249 this->supported_versions[this->num_supported_versions].gl_ver = 30;
250 this->supported_versions[this->num_supported_versions].es = true;
251 this->num_supported_versions++;
252 }
253 if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
254 this->supported_versions[this->num_supported_versions].ver = 310;
255 this->supported_versions[this->num_supported_versions].gl_ver = 31;
256 this->supported_versions[this->num_supported_versions].es = true;
257 this->num_supported_versions++;
258 }
259 if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
260 ctx->Extensions.ARB_ES3_2_compatibility) {
261 this->supported_versions[this->num_supported_versions].ver = 320;
262 this->supported_versions[this->num_supported_versions].gl_ver = 32;
263 this->supported_versions[this->num_supported_versions].es = true;
264 this->num_supported_versions++;
265 }
266
267 /* Create a string for use in error messages to tell the user which GLSL
268 * versions are supported.
269 */
270 char *supported = ralloc_strdup(this, "");
271 for (unsigned i = 0; i < this->num_supported_versions; i++) {
272 unsigned ver = this->supported_versions[i].ver;
273 const char *const prefix = (i == 0)
274 ? ""
275 : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
276 const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
277
278 ralloc_asprintf_append(& supported, "%s%u.%02u%s",
279 prefix,
280 ver / 100, ver % 100,
281 suffix);
282 }
283
284 this->supported_version_string = supported;
285
286 if (ctx->Const.ForceGLSLExtensionsWarn)
287 _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
288
289 this->default_uniform_qualifier = new(this) ast_type_qualifier();
290 this->default_uniform_qualifier->flags.q.shared = 1;
291 this->default_uniform_qualifier->flags.q.column_major = 1;
292
293 this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
294 this->default_shader_storage_qualifier->flags.q.shared = 1;
295 this->default_shader_storage_qualifier->flags.q.column_major = 1;
296
297 this->fs_uses_gl_fragcoord = false;
298 this->fs_redeclares_gl_fragcoord = false;
299 this->fs_origin_upper_left = false;
300 this->fs_pixel_center_integer = false;
301 this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
302
303 this->gs_input_prim_type_specified = false;
304 this->tcs_output_vertices_specified = false;
305 this->gs_input_size = 0;
306 this->in_qualifier = new(this) ast_type_qualifier();
307 this->out_qualifier = new(this) ast_type_qualifier();
308 this->fs_early_fragment_tests = false;
309 this->fs_inner_coverage = false;
310 this->fs_post_depth_coverage = false;
311 this->fs_pixel_interlock_ordered = false;
312 this->fs_pixel_interlock_unordered = false;
313 this->fs_sample_interlock_ordered = false;
314 this->fs_sample_interlock_unordered = false;
315 this->fs_blend_support = 0;
316 memset(this->atomic_counter_offsets, 0,
317 sizeof(this->atomic_counter_offsets));
318 this->allow_extension_directive_midshader =
319 ctx->Const.AllowGLSLExtensionDirectiveMidShader;
320 this->allow_glsl_120_subset_in_110 =
321 ctx->Const.AllowGLSL120SubsetIn110;
322 this->allow_builtin_variable_redeclaration =
323 ctx->Const.AllowGLSLBuiltinVariableRedeclaration;
324 this->ignore_write_to_readonly_var =
325 ctx->Const.GLSLIgnoreWriteToReadonlyVar;
326
327 this->cs_input_local_size_variable_specified = false;
328
329 /* ARB_bindless_texture */
330 this->bindless_sampler_specified = false;
331 this->bindless_image_specified = false;
332 this->bound_sampler_specified = false;
333 this->bound_image_specified = false;
334
335 this->language_version = this->forced_language_version ?
336 this->forced_language_version : this->language_version;
337 set_valid_gl_and_glsl_versions(NULL);
338 }
339
340 /**
341 * Determine whether the current GLSL version is sufficiently high to support
342 * a certain feature, and generate an error message if it isn't.
343 *
344 * \param required_glsl_version and \c required_glsl_es_version are
345 * interpreted as they are in _mesa_glsl_parse_state::is_version().
346 *
347 * \param locp is the parser location where the error should be reported.
348 *
349 * \param fmt (and additional arguments) constitute a printf-style error
350 * message to report if the version check fails. Information about the
351 * current and required GLSL versions will be appended. So, for example, if
352 * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
353 * "foo unsupported") is called, the error message will be "foo unsupported in
354 * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
355 */
356 bool
check_version(unsigned required_glsl_version,unsigned required_glsl_es_version,YYLTYPE * locp,const char * fmt,...)357 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
358 unsigned required_glsl_es_version,
359 YYLTYPE *locp, const char *fmt, ...)
360 {
361 if (this->is_version(required_glsl_version, required_glsl_es_version))
362 return true;
363
364 va_list args;
365 va_start(args, fmt);
366 char *problem = ralloc_vasprintf(this, fmt, args);
367 va_end(args);
368 const char *glsl_version_string
369 = glsl_compute_version_string(this, false, required_glsl_version);
370 const char *glsl_es_version_string
371 = glsl_compute_version_string(this, true, required_glsl_es_version);
372 const char *requirement_string = "";
373 if (required_glsl_version && required_glsl_es_version) {
374 requirement_string = ralloc_asprintf(this, " (%s or %s required)",
375 glsl_version_string,
376 glsl_es_version_string);
377 } else if (required_glsl_version) {
378 requirement_string = ralloc_asprintf(this, " (%s required)",
379 glsl_version_string);
380 } else if (required_glsl_es_version) {
381 requirement_string = ralloc_asprintf(this, " (%s required)",
382 glsl_es_version_string);
383 }
384 _mesa_glsl_error(locp, this, "%s in %s%s",
385 problem, this->get_version_string(),
386 requirement_string);
387
388 return false;
389 }
390
391 /**
392 * This makes sure any GLSL versions defined or overridden are valid. If not it
393 * sets a valid value.
394 */
395 void
set_valid_gl_and_glsl_versions(YYLTYPE * locp)396 _mesa_glsl_parse_state::set_valid_gl_and_glsl_versions(YYLTYPE *locp)
397 {
398 bool supported = false;
399 for (unsigned i = 0; i < this->num_supported_versions; i++) {
400 if (this->supported_versions[i].ver == this->language_version
401 && this->supported_versions[i].es == this->es_shader) {
402 this->gl_version = this->supported_versions[i].gl_ver;
403 supported = true;
404 break;
405 }
406 }
407
408 if (!supported) {
409 if (locp) {
410 _mesa_glsl_error(locp, this, "%s is not supported. "
411 "Supported versions are: %s",
412 this->get_version_string(),
413 this->supported_version_string);
414 }
415
416 /* On exit, the language_version must be set to a valid value.
417 * Later calls to _mesa_glsl_initialize_types will misbehave if
418 * the version is invalid.
419 */
420 switch (this->ctx->API) {
421 case API_OPENGL_COMPAT:
422 case API_OPENGL_CORE:
423 this->language_version = this->ctx->Const.GLSLVersion;
424 break;
425
426 case API_OPENGLES:
427 FALLTHROUGH;
428
429 case API_OPENGLES2:
430 this->language_version = 100;
431 break;
432 }
433 }
434 }
435
436 /**
437 * Process a GLSL #version directive.
438 *
439 * \param version is the integer that follows the #version token.
440 *
441 * \param ident is a string identifier that follows the integer, if any is
442 * present. Otherwise NULL.
443 */
444 void
process_version_directive(YYLTYPE * locp,int version,const char * ident)445 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
446 const char *ident)
447 {
448 bool es_token_present = false;
449 bool compat_token_present = false;
450 if (ident) {
451 if (strcmp(ident, "es") == 0) {
452 es_token_present = true;
453 } else if (version >= 150) {
454 if (strcmp(ident, "core") == 0) {
455 /* Accept the token. There's no need to record that this is
456 * a core profile shader since that's the only profile we support.
457 */
458 } else if (strcmp(ident, "compatibility") == 0) {
459 compat_token_present = true;
460
461 if (this->ctx->API != API_OPENGL_COMPAT) {
462 _mesa_glsl_error(locp, this,
463 "the compatibility profile is not supported");
464 }
465 } else {
466 _mesa_glsl_error(locp, this,
467 "\"%s\" is not a valid shading language profile; "
468 "if present, it must be \"core\"", ident);
469 }
470 } else {
471 _mesa_glsl_error(locp, this,
472 "illegal text following version number");
473 }
474 }
475
476 this->es_shader = es_token_present;
477 if (version == 100) {
478 if (es_token_present) {
479 _mesa_glsl_error(locp, this,
480 "GLSL 1.00 ES should be selected using "
481 "`#version 100'");
482 } else {
483 this->es_shader = true;
484 }
485 }
486
487 if (this->es_shader) {
488 this->ARB_texture_rectangle_enable = false;
489 }
490
491 if (this->forced_language_version)
492 this->language_version = this->forced_language_version;
493 else
494 this->language_version = version;
495
496 this->compat_shader = compat_token_present ||
497 (this->ctx->API == API_OPENGL_COMPAT &&
498 this->language_version == 140) ||
499 (!this->es_shader && this->language_version < 140);
500
501 set_valid_gl_and_glsl_versions(locp);
502 }
503
504
505 /* This helper function will append the given message to the shader's
506 info log and report it via GL_ARB_debug_output. Per that extension,
507 'type' is one of the enum values classifying the message, and
508 'id' is the implementation-defined ID of the given message. */
509 static void
_mesa_glsl_msg(const YYLTYPE * locp,_mesa_glsl_parse_state * state,GLenum type,const char * fmt,va_list ap)510 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
511 GLenum type, const char *fmt, va_list ap)
512 {
513 bool error = (type == MESA_DEBUG_TYPE_ERROR);
514 GLuint msg_id = 0;
515
516 assert(state->info_log != NULL);
517
518 /* Get the offset that the new message will be written to. */
519 int msg_offset = strlen(state->info_log);
520
521 if (locp->path) {
522 ralloc_asprintf_append(&state->info_log, "\"%s\"", locp->path);
523 } else {
524 ralloc_asprintf_append(&state->info_log, "%u", locp->source);
525 }
526 ralloc_asprintf_append(&state->info_log, ":%u(%u): %s: ",
527 locp->first_line, locp->first_column,
528 error ? "error" : "warning");
529
530 ralloc_vasprintf_append(&state->info_log, fmt, ap);
531
532 const char *const msg = &state->info_log[msg_offset];
533 struct gl_context *ctx = state->ctx;
534
535 /* Report the error via GL_ARB_debug_output. */
536 _mesa_shader_debug(ctx, type, &msg_id, msg);
537
538 ralloc_strcat(&state->info_log, "\n");
539 }
540
541 void
_mesa_glsl_error(YYLTYPE * locp,_mesa_glsl_parse_state * state,const char * fmt,...)542 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
543 const char *fmt, ...)
544 {
545 va_list ap;
546
547 state->error = true;
548
549 va_start(ap, fmt);
550 _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
551 va_end(ap);
552 }
553
554
555 void
_mesa_glsl_warning(const YYLTYPE * locp,_mesa_glsl_parse_state * state,const char * fmt,...)556 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
557 const char *fmt, ...)
558 {
559 if (state->warnings_enabled) {
560 va_list ap;
561
562 va_start(ap, fmt);
563 _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
564 va_end(ap);
565 }
566 }
567
568
569 /**
570 * Enum representing the possible behaviors that can be specified in
571 * an #extension directive.
572 */
573 enum ext_behavior {
574 extension_disable,
575 extension_enable,
576 extension_require,
577 extension_warn
578 };
579
580 /**
581 * Element type for _mesa_glsl_supported_extensions
582 */
583 struct _mesa_glsl_extension {
584 /**
585 * Name of the extension when referred to in a GLSL extension
586 * statement
587 */
588 const char *name;
589
590 /**
591 * Whether this extension is a part of AEP
592 */
593 bool aep;
594
595 /**
596 * Predicate that checks whether the relevant extension is available for
597 * this context.
598 */
599 bool (*available_pred)(const struct gl_context *,
600 gl_api api, uint8_t version);
601
602 /**
603 * Flag in the _mesa_glsl_parse_state struct that should be set
604 * when this extension is enabled.
605 *
606 * See note in _mesa_glsl_extension::supported_flag about "pointer
607 * to member" types.
608 */
609 bool _mesa_glsl_parse_state::* enable_flag;
610
611 /**
612 * Flag in the _mesa_glsl_parse_state struct that should be set
613 * when the shader requests "warn" behavior for this extension.
614 *
615 * See note in _mesa_glsl_extension::supported_flag about "pointer
616 * to member" types.
617 */
618 bool _mesa_glsl_parse_state::* warn_flag;
619
620
621 bool compatible_with_state(const _mesa_glsl_parse_state *state,
622 gl_api api, uint8_t gl_version) const;
623 void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
624 };
625
626 /** Checks if the context supports a user-facing extension */
627 #define EXT(name_str, driver_cap, ...) \
628 static UNUSED bool \
629 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
630 { \
631 return ctx->Extensions.driver_cap && (version >= \
632 _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
633 }
634 #include "main/extensions_table.h"
635 #undef EXT
636
637 #define EXT(NAME) \
638 { "GL_" #NAME, false, has_##NAME, \
639 &_mesa_glsl_parse_state::NAME##_enable, \
640 &_mesa_glsl_parse_state::NAME##_warn }
641
642 #define EXT_AEP(NAME) \
643 { "GL_" #NAME, true, has_##NAME, \
644 &_mesa_glsl_parse_state::NAME##_enable, \
645 &_mesa_glsl_parse_state::NAME##_warn }
646
647 /**
648 * Table of extensions that can be enabled/disabled within a shader,
649 * and the conditions under which they are supported.
650 */
651 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
652 /* ARB extensions go here, sorted alphabetically.
653 */
654 EXT(ARB_ES3_1_compatibility),
655 EXT(ARB_ES3_2_compatibility),
656 EXT(ARB_arrays_of_arrays),
657 EXT(ARB_bindless_texture),
658 EXT(ARB_compatibility),
659 EXT(ARB_compute_shader),
660 EXT(ARB_compute_variable_group_size),
661 EXT(ARB_conservative_depth),
662 EXT(ARB_cull_distance),
663 EXT(ARB_derivative_control),
664 EXT(ARB_draw_buffers),
665 EXT(ARB_draw_instanced),
666 EXT(ARB_enhanced_layouts),
667 EXT(ARB_explicit_attrib_location),
668 EXT(ARB_explicit_uniform_location),
669 EXT(ARB_fragment_coord_conventions),
670 EXT(ARB_fragment_layer_viewport),
671 EXT(ARB_fragment_shader_interlock),
672 EXT(ARB_gpu_shader5),
673 EXT(ARB_gpu_shader_fp64),
674 EXT(ARB_gpu_shader_int64),
675 EXT(ARB_post_depth_coverage),
676 EXT(ARB_sample_shading),
677 EXT(ARB_separate_shader_objects),
678 EXT(ARB_shader_atomic_counter_ops),
679 EXT(ARB_shader_atomic_counters),
680 EXT(ARB_shader_ballot),
681 EXT(ARB_shader_bit_encoding),
682 EXT(ARB_shader_clock),
683 EXT(ARB_shader_draw_parameters),
684 EXT(ARB_shader_group_vote),
685 EXT(ARB_shader_image_load_store),
686 EXT(ARB_shader_image_size),
687 EXT(ARB_shader_precision),
688 EXT(ARB_shader_stencil_export),
689 EXT(ARB_shader_storage_buffer_object),
690 EXT(ARB_shader_subroutine),
691 EXT(ARB_shader_texture_image_samples),
692 EXT(ARB_shader_texture_lod),
693 EXT(ARB_shader_viewport_layer_array),
694 EXT(ARB_shading_language_420pack),
695 EXT(ARB_shading_language_include),
696 EXT(ARB_shading_language_packing),
697 EXT(ARB_tessellation_shader),
698 EXT(ARB_texture_cube_map_array),
699 EXT(ARB_texture_gather),
700 EXT(ARB_texture_multisample),
701 EXT(ARB_texture_query_levels),
702 EXT(ARB_texture_query_lod),
703 EXT(ARB_texture_rectangle),
704 EXT(ARB_uniform_buffer_object),
705 EXT(ARB_vertex_attrib_64bit),
706 EXT(ARB_viewport_array),
707
708 /* KHR extensions go here, sorted alphabetically.
709 */
710 EXT_AEP(KHR_blend_equation_advanced),
711
712 /* OES extensions go here, sorted alphabetically.
713 */
714 EXT(OES_EGL_image_external),
715 EXT(OES_EGL_image_external_essl3),
716 EXT(OES_geometry_point_size),
717 EXT(OES_geometry_shader),
718 EXT(OES_gpu_shader5),
719 EXT(OES_primitive_bounding_box),
720 EXT_AEP(OES_sample_variables),
721 EXT_AEP(OES_shader_image_atomic),
722 EXT(OES_shader_io_blocks),
723 EXT_AEP(OES_shader_multisample_interpolation),
724 EXT(OES_standard_derivatives),
725 EXT(OES_tessellation_point_size),
726 EXT(OES_tessellation_shader),
727 EXT(OES_texture_3D),
728 EXT(OES_texture_buffer),
729 EXT(OES_texture_cube_map_array),
730 EXT_AEP(OES_texture_storage_multisample_2d_array),
731 EXT(OES_viewport_array),
732
733 /* All other extensions go here, sorted alphabetically.
734 */
735 EXT(AMD_conservative_depth),
736 EXT(AMD_gpu_shader_int64),
737 EXT(AMD_shader_stencil_export),
738 EXT(AMD_shader_trinary_minmax),
739 EXT(AMD_texture_texture4),
740 EXT(AMD_vertex_shader_layer),
741 EXT(AMD_vertex_shader_viewport_index),
742 EXT(ANDROID_extension_pack_es31a),
743 EXT(EXT_blend_func_extended),
744 EXT(EXT_demote_to_helper_invocation),
745 EXT(EXT_frag_depth),
746 EXT(EXT_draw_buffers),
747 EXT(EXT_draw_instanced),
748 EXT(EXT_clip_cull_distance),
749 EXT(EXT_geometry_point_size),
750 EXT_AEP(EXT_geometry_shader),
751 EXT(EXT_gpu_shader4),
752 EXT_AEP(EXT_gpu_shader5),
753 EXT_AEP(EXT_primitive_bounding_box),
754 EXT(EXT_separate_shader_objects),
755 EXT(EXT_shader_framebuffer_fetch),
756 EXT(EXT_shader_framebuffer_fetch_non_coherent),
757 EXT(EXT_shader_group_vote),
758 EXT(EXT_shader_image_load_formatted),
759 EXT(EXT_shader_image_load_store),
760 EXT(EXT_shader_implicit_conversions),
761 EXT(EXT_shader_integer_mix),
762 EXT_AEP(EXT_shader_io_blocks),
763 EXT(EXT_shader_samples_identical),
764 EXT(EXT_tessellation_point_size),
765 EXT_AEP(EXT_tessellation_shader),
766 EXT(EXT_texture_array),
767 EXT_AEP(EXT_texture_buffer),
768 EXT_AEP(EXT_texture_cube_map_array),
769 EXT(EXT_texture_query_lod),
770 EXT(EXT_texture_shadow_lod),
771 EXT(INTEL_conservative_rasterization),
772 EXT(INTEL_shader_atomic_float_minmax),
773 EXT(INTEL_shader_integer_functions2),
774 EXT(MESA_shader_integer_functions),
775 EXT(NV_compute_shader_derivatives),
776 EXT(NV_fragment_shader_interlock),
777 EXT(NV_image_formats),
778 EXT(NV_shader_atomic_float),
779 EXT(NV_shader_atomic_int64),
780 EXT(NV_viewport_array2),
781 };
782
783 #undef EXT
784
785
786 /**
787 * Determine whether a given extension is compatible with the target,
788 * API, and extension information in the current parser state.
789 */
compatible_with_state(const _mesa_glsl_parse_state * state,gl_api api,uint8_t gl_version) const790 bool _mesa_glsl_extension::compatible_with_state(
791 const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
792 {
793 return this->available_pred(state->ctx, api, gl_version);
794 }
795
796 /**
797 * Set the appropriate flags in the parser state to establish the
798 * given behavior for this extension.
799 */
set_flags(_mesa_glsl_parse_state * state,ext_behavior behavior) const800 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
801 ext_behavior behavior) const
802 {
803 /* Note: the ->* operator indexes into state by the
804 * offsets this->enable_flag and this->warn_flag. See
805 * _mesa_glsl_extension::supported_flag for more info.
806 */
807 state->*(this->enable_flag) = (behavior != extension_disable);
808 state->*(this->warn_flag) = (behavior == extension_warn);
809 }
810
811 /**
812 * Find an extension by name in _mesa_glsl_supported_extensions. If
813 * the name is not found, return NULL.
814 */
find_extension(const char * name)815 static const _mesa_glsl_extension *find_extension(const char *name)
816 {
817 for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
818 if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
819 return &_mesa_glsl_supported_extensions[i];
820 }
821 }
822 return NULL;
823 }
824
825 bool
_mesa_glsl_process_extension(const char * name,YYLTYPE * name_locp,const char * behavior_string,YYLTYPE * behavior_locp,_mesa_glsl_parse_state * state)826 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
827 const char *behavior_string, YYLTYPE *behavior_locp,
828 _mesa_glsl_parse_state *state)
829 {
830 uint8_t gl_version = state->ctx->Extensions.Version;
831 gl_api api = state->ctx->API;
832 ext_behavior behavior;
833 if (strcmp(behavior_string, "warn") == 0) {
834 behavior = extension_warn;
835 } else if (strcmp(behavior_string, "require") == 0) {
836 behavior = extension_require;
837 } else if (strcmp(behavior_string, "enable") == 0) {
838 behavior = extension_enable;
839 } else if (strcmp(behavior_string, "disable") == 0) {
840 behavior = extension_disable;
841 } else {
842 _mesa_glsl_error(behavior_locp, state,
843 "unknown extension behavior `%s'",
844 behavior_string);
845 return false;
846 }
847
848 /* If we're in a desktop context but with an ES shader, use an ES API enum
849 * to verify extension availability.
850 */
851 if (state->es_shader && api != API_OPENGLES2)
852 api = API_OPENGLES2;
853 /* Use the language-version derived GL version to extension checks, unless
854 * we're using meta, which sets the version to the max.
855 */
856 if (gl_version != 0xff)
857 gl_version = state->gl_version;
858
859 if (strcmp(name, "all") == 0) {
860 if ((behavior == extension_enable) || (behavior == extension_require)) {
861 _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
862 (behavior == extension_enable)
863 ? "enable" : "require");
864 return false;
865 } else {
866 for (unsigned i = 0;
867 i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
868 const _mesa_glsl_extension *extension
869 = &_mesa_glsl_supported_extensions[i];
870 if (extension->compatible_with_state(state, api, gl_version)) {
871 _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
872 }
873 }
874 }
875 } else {
876 const _mesa_glsl_extension *extension = find_extension(name);
877 if (extension && extension->compatible_with_state(state, api, gl_version)) {
878 extension->set_flags(state, behavior);
879 if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
880 for (unsigned i = 0;
881 i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
882 const _mesa_glsl_extension *extension =
883 &_mesa_glsl_supported_extensions[i];
884
885 if (!extension->aep)
886 continue;
887 /* AEP should not be enabled if all of the sub-extensions can't
888 * also be enabled. This is not the proper layer to do such
889 * error-checking though.
890 */
891 assert(extension->compatible_with_state(state, api, gl_version));
892 extension->set_flags(state, behavior);
893 }
894 }
895 } else {
896 static const char fmt[] = "extension `%s' unsupported in %s shader";
897
898 if (behavior == extension_require) {
899 _mesa_glsl_error(name_locp, state, fmt,
900 name, _mesa_shader_stage_to_string(state->stage));
901 return false;
902 } else {
903 _mesa_glsl_warning(name_locp, state, fmt,
904 name, _mesa_shader_stage_to_string(state->stage));
905 }
906 }
907 }
908
909 return true;
910 }
911
912
913 /**
914 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
915 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
916 * (process_array_constructor, et al) sufficient information to do type
917 * checking.
918 *
919 * Operates on assignments involving an aggregate initializer. E.g.,
920 *
921 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
922 *
923 * or more ridiculously,
924 *
925 * struct S {
926 * vec4 v[2];
927 * };
928 *
929 * struct {
930 * S a[2], b;
931 * int c;
932 * } aggregate = {
933 * {
934 * {
935 * {
936 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
937 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
938 * } // a[0].v
939 * }, // a[0]
940 * {
941 * {
942 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
943 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
944 * } // a[1].v
945 * } // a[1]
946 * }, // a
947 * {
948 * {
949 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
950 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
951 * } // b.v
952 * }, // b
953 * 4 // c
954 * };
955 *
956 * This pass is necessary because the right-hand side of <type> e = { ... }
957 * doesn't contain sufficient information to determine if the types match.
958 */
959 void
_mesa_ast_set_aggregate_type(const glsl_type * type,ast_expression * expr)960 _mesa_ast_set_aggregate_type(const glsl_type *type,
961 ast_expression *expr)
962 {
963 ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
964 ai->constructor_type = type;
965
966 /* If the aggregate is an array, recursively set its elements' types. */
967 if (type->is_array()) {
968 /* Each array element has the type type->fields.array.
969 *
970 * E.g., if <type> if struct S[2] we want to set each element's type to
971 * struct S.
972 */
973 for (exec_node *expr_node = ai->expressions.get_head_raw();
974 !expr_node->is_tail_sentinel();
975 expr_node = expr_node->next) {
976 ast_expression *expr = exec_node_data(ast_expression, expr_node,
977 link);
978
979 if (expr->oper == ast_aggregate)
980 _mesa_ast_set_aggregate_type(type->fields.array, expr);
981 }
982
983 /* If the aggregate is a struct, recursively set its fields' types. */
984 } else if (type->is_struct()) {
985 exec_node *expr_node = ai->expressions.get_head_raw();
986
987 /* Iterate through the struct's fields. */
988 for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
989 i++, expr_node = expr_node->next) {
990 ast_expression *expr = exec_node_data(ast_expression, expr_node,
991 link);
992
993 if (expr->oper == ast_aggregate) {
994 _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
995 }
996 }
997 /* If the aggregate is a matrix, set its columns' types. */
998 } else if (type->is_matrix()) {
999 for (exec_node *expr_node = ai->expressions.get_head_raw();
1000 !expr_node->is_tail_sentinel();
1001 expr_node = expr_node->next) {
1002 ast_expression *expr = exec_node_data(ast_expression, expr_node,
1003 link);
1004
1005 if (expr->oper == ast_aggregate)
1006 _mesa_ast_set_aggregate_type(type->column_type(), expr);
1007 }
1008 }
1009 }
1010
1011 void
_mesa_ast_process_interface_block(YYLTYPE * locp,_mesa_glsl_parse_state * state,ast_interface_block * const block,const struct ast_type_qualifier & q)1012 _mesa_ast_process_interface_block(YYLTYPE *locp,
1013 _mesa_glsl_parse_state *state,
1014 ast_interface_block *const block,
1015 const struct ast_type_qualifier &q)
1016 {
1017 if (q.flags.q.buffer) {
1018 if (!state->has_shader_storage_buffer_objects()) {
1019 _mesa_glsl_error(locp, state,
1020 "#version 430 / GL_ARB_shader_storage_buffer_object "
1021 "required for defining shader storage blocks");
1022 } else if (state->ARB_shader_storage_buffer_object_warn) {
1023 _mesa_glsl_warning(locp, state,
1024 "#version 430 / GL_ARB_shader_storage_buffer_object "
1025 "required for defining shader storage blocks");
1026 }
1027 } else if (q.flags.q.uniform) {
1028 if (!state->has_uniform_buffer_objects()) {
1029 _mesa_glsl_error(locp, state,
1030 "#version 140 / GL_ARB_uniform_buffer_object "
1031 "required for defining uniform blocks");
1032 } else if (state->ARB_uniform_buffer_object_warn) {
1033 _mesa_glsl_warning(locp, state,
1034 "#version 140 / GL_ARB_uniform_buffer_object "
1035 "required for defining uniform blocks");
1036 }
1037 } else {
1038 if (!state->has_shader_io_blocks()) {
1039 if (state->es_shader) {
1040 _mesa_glsl_error(locp, state,
1041 "GL_OES_shader_io_blocks or #version 320 "
1042 "required for using interface blocks");
1043 } else {
1044 _mesa_glsl_error(locp, state,
1045 "#version 150 required for using "
1046 "interface blocks");
1047 }
1048 }
1049 }
1050
1051 /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
1052 * "It is illegal to have an input block in a vertex shader
1053 * or an output block in a fragment shader"
1054 */
1055 if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
1056 _mesa_glsl_error(locp, state,
1057 "`in' interface block is not allowed for "
1058 "a vertex shader");
1059 } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1060 _mesa_glsl_error(locp, state,
1061 "`out' interface block is not allowed for "
1062 "a fragment shader");
1063 }
1064
1065 /* Since block arrays require names, and both features are added in
1066 * the same language versions, we don't have to explicitly
1067 * version-check both things.
1068 */
1069 if (block->instance_name != NULL) {
1070 state->check_version(150, 300, locp, "interface blocks with "
1071 "an instance name are not allowed");
1072 }
1073
1074 ast_type_qualifier::bitset_t interface_type_mask;
1075 struct ast_type_qualifier temp_type_qualifier;
1076
1077 /* Get a bitmask containing only the in/out/uniform/buffer
1078 * flags, allowing us to ignore other irrelevant flags like
1079 * interpolation qualifiers.
1080 */
1081 temp_type_qualifier.flags.i = 0;
1082 temp_type_qualifier.flags.q.uniform = true;
1083 temp_type_qualifier.flags.q.in = true;
1084 temp_type_qualifier.flags.q.out = true;
1085 temp_type_qualifier.flags.q.buffer = true;
1086 temp_type_qualifier.flags.q.patch = true;
1087 interface_type_mask = temp_type_qualifier.flags.i;
1088
1089 /* Get the block's interface qualifier. The interface_qualifier
1090 * production rule guarantees that only one bit will be set (and
1091 * it will be in/out/uniform).
1092 */
1093 ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1094
1095 block->default_layout.flags.i |= block_interface_qualifier;
1096
1097 if (state->stage == MESA_SHADER_GEOMETRY &&
1098 state->has_explicit_attrib_stream() &&
1099 block->default_layout.flags.q.out) {
1100 /* Assign global layout's stream value. */
1101 block->default_layout.flags.q.stream = 1;
1102 block->default_layout.flags.q.explicit_stream = 0;
1103 block->default_layout.stream = state->out_qualifier->stream;
1104 }
1105
1106 if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1107 /* Assign global layout's xfb_buffer value. */
1108 block->default_layout.flags.q.xfb_buffer = 1;
1109 block->default_layout.flags.q.explicit_xfb_buffer = 0;
1110 block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1111 }
1112
1113 foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1114 ast_type_qualifier& qualifier = member->type->qualifier;
1115 if ((qualifier.flags.i & interface_type_mask) == 0) {
1116 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1117 * "If no optional qualifier is used in a member declaration, the
1118 * qualifier of the variable is just in, out, or uniform as declared
1119 * by interface-qualifier."
1120 */
1121 qualifier.flags.i |= block_interface_qualifier;
1122 } else if ((qualifier.flags.i & interface_type_mask) !=
1123 block_interface_qualifier) {
1124 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1125 * "If optional qualifiers are used, they can include interpolation
1126 * and storage qualifiers and they must declare an input, output,
1127 * or uniform variable consistent with the interface qualifier of
1128 * the block."
1129 */
1130 _mesa_glsl_error(locp, state,
1131 "uniform/in/out qualifier on "
1132 "interface block member does not match "
1133 "the interface block");
1134 }
1135
1136 if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1137 _mesa_glsl_error(locp, state,
1138 "invariant qualifiers can be used only "
1139 "in interface block members for shader "
1140 "inputs or outputs");
1141 }
1142 }
1143
1144 static void
_mesa_ast_type_qualifier_print(const struct ast_type_qualifier * q)1145 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1146 {
1147 if (q->is_subroutine_decl())
1148 printf("subroutine ");
1149
1150 if (q->subroutine_list) {
1151 printf("subroutine (");
1152 q->subroutine_list->print();
1153 printf(")");
1154 }
1155
1156 if (q->flags.q.constant)
1157 printf("const ");
1158
1159 if (q->flags.q.invariant)
1160 printf("invariant ");
1161
1162 if (q->flags.q.attribute)
1163 printf("attribute ");
1164
1165 if (q->flags.q.varying)
1166 printf("varying ");
1167
1168 if (q->flags.q.in && q->flags.q.out)
1169 printf("inout ");
1170 else {
1171 if (q->flags.q.in)
1172 printf("in ");
1173
1174 if (q->flags.q.out)
1175 printf("out ");
1176 }
1177
1178 if (q->flags.q.centroid)
1179 printf("centroid ");
1180 if (q->flags.q.sample)
1181 printf("sample ");
1182 if (q->flags.q.patch)
1183 printf("patch ");
1184 if (q->flags.q.uniform)
1185 printf("uniform ");
1186 if (q->flags.q.buffer)
1187 printf("buffer ");
1188 if (q->flags.q.smooth)
1189 printf("smooth ");
1190 if (q->flags.q.flat)
1191 printf("flat ");
1192 if (q->flags.q.noperspective)
1193 printf("noperspective ");
1194 }
1195
1196
1197 void
print(void) const1198 ast_node::print(void) const
1199 {
1200 printf("unhandled node ");
1201 }
1202
1203
ast_node(void)1204 ast_node::ast_node(void)
1205 {
1206 this->location.path = NULL;
1207 this->location.source = 0;
1208 this->location.first_line = 0;
1209 this->location.first_column = 0;
1210 this->location.last_line = 0;
1211 this->location.last_column = 0;
1212 }
1213
1214
1215 static void
ast_opt_array_dimensions_print(const ast_array_specifier * array_specifier)1216 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1217 {
1218 if (array_specifier)
1219 array_specifier->print();
1220 }
1221
1222
1223 void
print(void) const1224 ast_compound_statement::print(void) const
1225 {
1226 printf("{\n");
1227
1228 foreach_list_typed(ast_node, ast, link, &this->statements) {
1229 ast->print();
1230 }
1231
1232 printf("}\n");
1233 }
1234
1235
ast_compound_statement(int new_scope,ast_node * statements)1236 ast_compound_statement::ast_compound_statement(int new_scope,
1237 ast_node *statements)
1238 {
1239 this->new_scope = new_scope;
1240
1241 if (statements != NULL) {
1242 this->statements.push_degenerate_list_at_head(&statements->link);
1243 }
1244 }
1245
1246
1247 void
print(void) const1248 ast_expression::print(void) const
1249 {
1250 switch (oper) {
1251 case ast_assign:
1252 case ast_mul_assign:
1253 case ast_div_assign:
1254 case ast_mod_assign:
1255 case ast_add_assign:
1256 case ast_sub_assign:
1257 case ast_ls_assign:
1258 case ast_rs_assign:
1259 case ast_and_assign:
1260 case ast_xor_assign:
1261 case ast_or_assign:
1262 subexpressions[0]->print();
1263 printf("%s ", operator_string(oper));
1264 subexpressions[1]->print();
1265 break;
1266
1267 case ast_field_selection:
1268 subexpressions[0]->print();
1269 printf(". %s ", primary_expression.identifier);
1270 break;
1271
1272 case ast_plus:
1273 case ast_neg:
1274 case ast_bit_not:
1275 case ast_logic_not:
1276 case ast_pre_inc:
1277 case ast_pre_dec:
1278 printf("%s ", operator_string(oper));
1279 subexpressions[0]->print();
1280 break;
1281
1282 case ast_post_inc:
1283 case ast_post_dec:
1284 subexpressions[0]->print();
1285 printf("%s ", operator_string(oper));
1286 break;
1287
1288 case ast_conditional:
1289 subexpressions[0]->print();
1290 printf("? ");
1291 subexpressions[1]->print();
1292 printf(": ");
1293 subexpressions[2]->print();
1294 break;
1295
1296 case ast_array_index:
1297 subexpressions[0]->print();
1298 printf("[ ");
1299 subexpressions[1]->print();
1300 printf("] ");
1301 break;
1302
1303 case ast_function_call: {
1304 subexpressions[0]->print();
1305 printf("( ");
1306
1307 foreach_list_typed (ast_node, ast, link, &this->expressions) {
1308 if (&ast->link != this->expressions.get_head())
1309 printf(", ");
1310
1311 ast->print();
1312 }
1313
1314 printf(") ");
1315 break;
1316 }
1317
1318 case ast_identifier:
1319 printf("%s ", primary_expression.identifier);
1320 break;
1321
1322 case ast_int_constant:
1323 printf("%d ", primary_expression.int_constant);
1324 break;
1325
1326 case ast_uint_constant:
1327 printf("%u ", primary_expression.uint_constant);
1328 break;
1329
1330 case ast_float_constant:
1331 printf("%f ", primary_expression.float_constant);
1332 break;
1333
1334 case ast_double_constant:
1335 printf("%f ", primary_expression.double_constant);
1336 break;
1337
1338 case ast_int64_constant:
1339 printf("%" PRId64 " ", primary_expression.int64_constant);
1340 break;
1341
1342 case ast_uint64_constant:
1343 printf("%" PRIu64 " ", primary_expression.uint64_constant);
1344 break;
1345
1346 case ast_bool_constant:
1347 printf("%s ",
1348 primary_expression.bool_constant
1349 ? "true" : "false");
1350 break;
1351
1352 case ast_sequence: {
1353 printf("( ");
1354 foreach_list_typed (ast_node, ast, link, & this->expressions) {
1355 if (&ast->link != this->expressions.get_head())
1356 printf(", ");
1357
1358 ast->print();
1359 }
1360 printf(") ");
1361 break;
1362 }
1363
1364 case ast_aggregate: {
1365 printf("{ ");
1366 foreach_list_typed (ast_node, ast, link, & this->expressions) {
1367 if (&ast->link != this->expressions.get_head())
1368 printf(", ");
1369
1370 ast->print();
1371 }
1372 printf("} ");
1373 break;
1374 }
1375
1376 default:
1377 assert(0);
1378 break;
1379 }
1380 }
1381
ast_expression(int oper,ast_expression * ex0,ast_expression * ex1,ast_expression * ex2)1382 ast_expression::ast_expression(int oper,
1383 ast_expression *ex0,
1384 ast_expression *ex1,
1385 ast_expression *ex2) :
1386 primary_expression()
1387 {
1388 this->oper = ast_operators(oper);
1389 this->subexpressions[0] = ex0;
1390 this->subexpressions[1] = ex1;
1391 this->subexpressions[2] = ex2;
1392 this->non_lvalue_description = NULL;
1393 this->is_lhs = false;
1394 }
1395
1396
1397 void
print(void) const1398 ast_expression_statement::print(void) const
1399 {
1400 if (expression)
1401 expression->print();
1402
1403 printf("; ");
1404 }
1405
1406
ast_expression_statement(ast_expression * ex)1407 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1408 expression(ex)
1409 {
1410 /* empty */
1411 }
1412
1413
1414 void
print(void) const1415 ast_function::print(void) const
1416 {
1417 return_type->print();
1418 printf(" %s (", identifier);
1419
1420 foreach_list_typed(ast_node, ast, link, & this->parameters) {
1421 ast->print();
1422 }
1423
1424 printf(")");
1425 }
1426
1427
ast_function(void)1428 ast_function::ast_function(void)
1429 : return_type(NULL), identifier(NULL), is_definition(false),
1430 signature(NULL)
1431 {
1432 /* empty */
1433 }
1434
1435
1436 void
print(void) const1437 ast_fully_specified_type::print(void) const
1438 {
1439 _mesa_ast_type_qualifier_print(& qualifier);
1440 specifier->print();
1441 }
1442
1443
1444 void
print(void) const1445 ast_parameter_declarator::print(void) const
1446 {
1447 type->print();
1448 if (identifier)
1449 printf("%s ", identifier);
1450 ast_opt_array_dimensions_print(array_specifier);
1451 }
1452
1453
1454 void
print(void) const1455 ast_function_definition::print(void) const
1456 {
1457 prototype->print();
1458 body->print();
1459 }
1460
1461
1462 void
print(void) const1463 ast_declaration::print(void) const
1464 {
1465 printf("%s ", identifier);
1466 ast_opt_array_dimensions_print(array_specifier);
1467
1468 if (initializer) {
1469 printf("= ");
1470 initializer->print();
1471 }
1472 }
1473
1474
ast_declaration(const char * identifier,ast_array_specifier * array_specifier,ast_expression * initializer)1475 ast_declaration::ast_declaration(const char *identifier,
1476 ast_array_specifier *array_specifier,
1477 ast_expression *initializer)
1478 {
1479 this->identifier = identifier;
1480 this->array_specifier = array_specifier;
1481 this->initializer = initializer;
1482 }
1483
1484
1485 void
print(void) const1486 ast_declarator_list::print(void) const
1487 {
1488 assert(type || invariant);
1489
1490 if (type)
1491 type->print();
1492 else if (invariant)
1493 printf("invariant ");
1494 else
1495 printf("precise ");
1496
1497 foreach_list_typed (ast_node, ast, link, & this->declarations) {
1498 if (&ast->link != this->declarations.get_head())
1499 printf(", ");
1500
1501 ast->print();
1502 }
1503
1504 printf("; ");
1505 }
1506
1507
ast_declarator_list(ast_fully_specified_type * type)1508 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1509 {
1510 this->type = type;
1511 this->invariant = false;
1512 this->precise = false;
1513 }
1514
1515 void
print(void) const1516 ast_jump_statement::print(void) const
1517 {
1518 switch (mode) {
1519 case ast_continue:
1520 printf("continue; ");
1521 break;
1522 case ast_break:
1523 printf("break; ");
1524 break;
1525 case ast_return:
1526 printf("return ");
1527 if (opt_return_value)
1528 opt_return_value->print();
1529
1530 printf("; ");
1531 break;
1532 case ast_discard:
1533 printf("discard; ");
1534 break;
1535 }
1536 }
1537
1538
ast_jump_statement(int mode,ast_expression * return_value)1539 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1540 : opt_return_value(NULL)
1541 {
1542 this->mode = ast_jump_modes(mode);
1543
1544 if (mode == ast_return)
1545 opt_return_value = return_value;
1546 }
1547
1548
1549 void
print(void) const1550 ast_demote_statement::print(void) const
1551 {
1552 printf("demote; ");
1553 }
1554
1555
1556 void
print(void) const1557 ast_selection_statement::print(void) const
1558 {
1559 printf("if ( ");
1560 condition->print();
1561 printf(") ");
1562
1563 then_statement->print();
1564
1565 if (else_statement) {
1566 printf("else ");
1567 else_statement->print();
1568 }
1569 }
1570
1571
ast_selection_statement(ast_expression * condition,ast_node * then_statement,ast_node * else_statement)1572 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1573 ast_node *then_statement,
1574 ast_node *else_statement)
1575 {
1576 this->condition = condition;
1577 this->then_statement = then_statement;
1578 this->else_statement = else_statement;
1579 }
1580
1581
1582 void
print(void) const1583 ast_switch_statement::print(void) const
1584 {
1585 printf("switch ( ");
1586 test_expression->print();
1587 printf(") ");
1588
1589 body->print();
1590 }
1591
1592
ast_switch_statement(ast_expression * test_expression,ast_node * body)1593 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1594 ast_node *body)
1595 {
1596 this->test_expression = test_expression;
1597 this->body = body;
1598 this->test_val = NULL;
1599 }
1600
1601
1602 void
print(void) const1603 ast_switch_body::print(void) const
1604 {
1605 printf("{\n");
1606 if (stmts != NULL) {
1607 stmts->print();
1608 }
1609 printf("}\n");
1610 }
1611
1612
ast_switch_body(ast_case_statement_list * stmts)1613 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1614 {
1615 this->stmts = stmts;
1616 }
1617
1618
print(void) const1619 void ast_case_label::print(void) const
1620 {
1621 if (test_value != NULL) {
1622 printf("case ");
1623 test_value->print();
1624 printf(": ");
1625 } else {
1626 printf("default: ");
1627 }
1628 }
1629
1630
ast_case_label(ast_expression * test_value)1631 ast_case_label::ast_case_label(ast_expression *test_value)
1632 {
1633 this->test_value = test_value;
1634 }
1635
1636
print(void) const1637 void ast_case_label_list::print(void) const
1638 {
1639 foreach_list_typed(ast_node, ast, link, & this->labels) {
1640 ast->print();
1641 }
1642 printf("\n");
1643 }
1644
1645
ast_case_label_list(void)1646 ast_case_label_list::ast_case_label_list(void)
1647 {
1648 }
1649
1650
print(void) const1651 void ast_case_statement::print(void) const
1652 {
1653 labels->print();
1654 foreach_list_typed(ast_node, ast, link, & this->stmts) {
1655 ast->print();
1656 printf("\n");
1657 }
1658 }
1659
1660
ast_case_statement(ast_case_label_list * labels)1661 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1662 {
1663 this->labels = labels;
1664 }
1665
1666
print(void) const1667 void ast_case_statement_list::print(void) const
1668 {
1669 foreach_list_typed(ast_node, ast, link, & this->cases) {
1670 ast->print();
1671 }
1672 }
1673
1674
ast_case_statement_list(void)1675 ast_case_statement_list::ast_case_statement_list(void)
1676 {
1677 }
1678
1679
1680 void
print(void) const1681 ast_iteration_statement::print(void) const
1682 {
1683 switch (mode) {
1684 case ast_for:
1685 printf("for( ");
1686 if (init_statement)
1687 init_statement->print();
1688 printf("; ");
1689
1690 if (condition)
1691 condition->print();
1692 printf("; ");
1693
1694 if (rest_expression)
1695 rest_expression->print();
1696 printf(") ");
1697
1698 body->print();
1699 break;
1700
1701 case ast_while:
1702 printf("while ( ");
1703 if (condition)
1704 condition->print();
1705 printf(") ");
1706 body->print();
1707 break;
1708
1709 case ast_do_while:
1710 printf("do ");
1711 body->print();
1712 printf("while ( ");
1713 if (condition)
1714 condition->print();
1715 printf("); ");
1716 break;
1717 }
1718 }
1719
1720
ast_iteration_statement(int mode,ast_node * init,ast_node * condition,ast_expression * rest_expression,ast_node * body)1721 ast_iteration_statement::ast_iteration_statement(int mode,
1722 ast_node *init,
1723 ast_node *condition,
1724 ast_expression *rest_expression,
1725 ast_node *body)
1726 {
1727 this->mode = ast_iteration_modes(mode);
1728 this->init_statement = init;
1729 this->condition = condition;
1730 this->rest_expression = rest_expression;
1731 this->body = body;
1732 }
1733
1734
1735 void
print(void) const1736 ast_struct_specifier::print(void) const
1737 {
1738 printf("struct %s { ", name);
1739 foreach_list_typed(ast_node, ast, link, &this->declarations) {
1740 ast->print();
1741 }
1742 printf("} ");
1743 }
1744
1745
ast_struct_specifier(const char * identifier,ast_declarator_list * declarator_list)1746 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1747 ast_declarator_list *declarator_list)
1748 : name(identifier), layout(NULL), declarations(), is_declaration(true),
1749 type(NULL)
1750 {
1751 this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1752 }
1753
print(void) const1754 void ast_subroutine_list::print(void) const
1755 {
1756 foreach_list_typed (ast_node, ast, link, & this->declarations) {
1757 if (&ast->link != this->declarations.get_head())
1758 printf(", ");
1759 ast->print();
1760 }
1761 }
1762
1763 static void
set_shader_inout_layout(struct gl_shader * shader,struct _mesa_glsl_parse_state * state)1764 set_shader_inout_layout(struct gl_shader *shader,
1765 struct _mesa_glsl_parse_state *state)
1766 {
1767 /* Should have been prevented by the parser. */
1768 if (shader->Stage != MESA_SHADER_GEOMETRY &&
1769 shader->Stage != MESA_SHADER_TESS_EVAL &&
1770 shader->Stage != MESA_SHADER_COMPUTE) {
1771 assert(!state->in_qualifier->flags.i);
1772 }
1773
1774 if (shader->Stage != MESA_SHADER_COMPUTE) {
1775 /* Should have been prevented by the parser. */
1776 assert(!state->cs_input_local_size_specified);
1777 assert(!state->cs_input_local_size_variable_specified);
1778 assert(state->cs_derivative_group == DERIVATIVE_GROUP_NONE);
1779 }
1780
1781 if (shader->Stage != MESA_SHADER_FRAGMENT) {
1782 /* Should have been prevented by the parser. */
1783 assert(!state->fs_uses_gl_fragcoord);
1784 assert(!state->fs_redeclares_gl_fragcoord);
1785 assert(!state->fs_pixel_center_integer);
1786 assert(!state->fs_origin_upper_left);
1787 assert(!state->fs_early_fragment_tests);
1788 assert(!state->fs_inner_coverage);
1789 assert(!state->fs_post_depth_coverage);
1790 assert(!state->fs_pixel_interlock_ordered);
1791 assert(!state->fs_pixel_interlock_unordered);
1792 assert(!state->fs_sample_interlock_ordered);
1793 assert(!state->fs_sample_interlock_unordered);
1794 }
1795
1796 for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1797 if (state->out_qualifier->out_xfb_stride[i]) {
1798 unsigned xfb_stride;
1799 if (state->out_qualifier->out_xfb_stride[i]->
1800 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1801 true)) {
1802 shader->TransformFeedbackBufferStride[i] = xfb_stride;
1803 }
1804 }
1805 }
1806
1807 switch (shader->Stage) {
1808 case MESA_SHADER_TESS_CTRL:
1809 shader->info.TessCtrl.VerticesOut = 0;
1810 if (state->tcs_output_vertices_specified) {
1811 unsigned vertices;
1812 if (state->out_qualifier->vertices->
1813 process_qualifier_constant(state, "vertices", &vertices,
1814 false)) {
1815
1816 YYLTYPE loc = state->out_qualifier->vertices->get_location();
1817 if (vertices > state->Const.MaxPatchVertices) {
1818 _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1819 "GL_MAX_PATCH_VERTICES", vertices);
1820 }
1821 shader->info.TessCtrl.VerticesOut = vertices;
1822 }
1823 }
1824 break;
1825 case MESA_SHADER_TESS_EVAL:
1826 shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1827 if (state->in_qualifier->flags.q.prim_type)
1828 shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1829
1830 shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1831 if (state->in_qualifier->flags.q.vertex_spacing)
1832 shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1833
1834 shader->info.TessEval.VertexOrder = 0;
1835 if (state->in_qualifier->flags.q.ordering)
1836 shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1837
1838 shader->info.TessEval.PointMode = -1;
1839 if (state->in_qualifier->flags.q.point_mode)
1840 shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1841 break;
1842 case MESA_SHADER_GEOMETRY:
1843 shader->info.Geom.VerticesOut = -1;
1844 if (state->out_qualifier->flags.q.max_vertices) {
1845 unsigned qual_max_vertices;
1846 if (state->out_qualifier->max_vertices->
1847 process_qualifier_constant(state, "max_vertices",
1848 &qual_max_vertices, true)) {
1849
1850 if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1851 YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1852 _mesa_glsl_error(&loc, state,
1853 "maximum output vertices (%d) exceeds "
1854 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1855 qual_max_vertices);
1856 }
1857 shader->info.Geom.VerticesOut = qual_max_vertices;
1858 }
1859 }
1860
1861 if (state->gs_input_prim_type_specified) {
1862 shader->info.Geom.InputType = state->in_qualifier->prim_type;
1863 } else {
1864 shader->info.Geom.InputType = PRIM_UNKNOWN;
1865 }
1866
1867 if (state->out_qualifier->flags.q.prim_type) {
1868 shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1869 } else {
1870 shader->info.Geom.OutputType = PRIM_UNKNOWN;
1871 }
1872
1873 shader->info.Geom.Invocations = 0;
1874 if (state->in_qualifier->flags.q.invocations) {
1875 unsigned invocations;
1876 if (state->in_qualifier->invocations->
1877 process_qualifier_constant(state, "invocations",
1878 &invocations, false)) {
1879
1880 YYLTYPE loc = state->in_qualifier->invocations->get_location();
1881 if (invocations > state->Const.MaxGeometryShaderInvocations) {
1882 _mesa_glsl_error(&loc, state,
1883 "invocations (%d) exceeds "
1884 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1885 invocations);
1886 }
1887 shader->info.Geom.Invocations = invocations;
1888 }
1889 }
1890 break;
1891
1892 case MESA_SHADER_COMPUTE:
1893 if (state->cs_input_local_size_specified) {
1894 for (int i = 0; i < 3; i++)
1895 shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1896 } else {
1897 for (int i = 0; i < 3; i++)
1898 shader->info.Comp.LocalSize[i] = 0;
1899 }
1900
1901 shader->info.Comp.LocalSizeVariable =
1902 state->cs_input_local_size_variable_specified;
1903
1904 shader->info.Comp.DerivativeGroup = state->cs_derivative_group;
1905
1906 if (state->NV_compute_shader_derivatives_enable) {
1907 /* We allow multiple cs_input_layout nodes, but do not store them in
1908 * a convenient place, so for now live with an empty location error.
1909 */
1910 YYLTYPE loc = {0};
1911 if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_QUADS) {
1912 if (shader->info.Comp.LocalSize[0] % 2 != 0) {
1913 _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1914 "local group size whose first dimension "
1915 "is a multiple of 2\n");
1916 }
1917 if (shader->info.Comp.LocalSize[1] % 2 != 0) {
1918 _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1919 "local group size whose second dimension "
1920 "is a multiple of 2\n");
1921 }
1922 } else if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_LINEAR) {
1923 if ((shader->info.Comp.LocalSize[0] *
1924 shader->info.Comp.LocalSize[1] *
1925 shader->info.Comp.LocalSize[2]) % 4 != 0) {
1926 _mesa_glsl_error(&loc, state, "derivative_group_linearNV must be used with a "
1927 "local group size whose total number of invocations "
1928 "is a multiple of 4\n");
1929 }
1930 }
1931 }
1932
1933 break;
1934
1935 case MESA_SHADER_FRAGMENT:
1936 shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1937 shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1938 shader->pixel_center_integer = state->fs_pixel_center_integer;
1939 shader->origin_upper_left = state->fs_origin_upper_left;
1940 shader->ARB_fragment_coord_conventions_enable =
1941 state->ARB_fragment_coord_conventions_enable;
1942 shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1943 shader->InnerCoverage = state->fs_inner_coverage;
1944 shader->PostDepthCoverage = state->fs_post_depth_coverage;
1945 shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
1946 shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
1947 shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
1948 shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
1949 shader->BlendSupport = state->fs_blend_support;
1950 break;
1951
1952 default:
1953 /* Nothing to do. */
1954 break;
1955 }
1956
1957 shader->bindless_sampler = state->bindless_sampler_specified;
1958 shader->bindless_image = state->bindless_image_specified;
1959 shader->bound_sampler = state->bound_sampler_specified;
1960 shader->bound_image = state->bound_image_specified;
1961 shader->redeclares_gl_layer = state->redeclares_gl_layer;
1962 shader->layer_viewport_relative = state->layer_viewport_relative;
1963 }
1964
1965 /* src can be NULL if only the symbols found in the exec_list should be
1966 * copied
1967 */
1968 void
_mesa_glsl_copy_symbols_from_table(struct exec_list * shader_ir,struct glsl_symbol_table * src,struct glsl_symbol_table * dest)1969 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1970 struct glsl_symbol_table *src,
1971 struct glsl_symbol_table *dest)
1972 {
1973 foreach_in_list (ir_instruction, ir, shader_ir) {
1974 switch (ir->ir_type) {
1975 case ir_type_function:
1976 dest->add_function((ir_function *) ir);
1977 break;
1978 case ir_type_variable: {
1979 ir_variable *const var = (ir_variable *) ir;
1980
1981 if (var->data.mode != ir_var_temporary)
1982 dest->add_variable(var);
1983 break;
1984 }
1985 default:
1986 break;
1987 }
1988 }
1989
1990 if (src != NULL) {
1991 /* Explicitly copy the gl_PerVertex interface definitions because these
1992 * are needed to check they are the same during the interstage link.
1993 * They can’t necessarily be found via the exec_list because the members
1994 * might not be referenced. The GL spec still requires that they match
1995 * in that case.
1996 */
1997 const glsl_type *iface =
1998 src->get_interface("gl_PerVertex", ir_var_shader_in);
1999 if (iface)
2000 dest->add_interface(iface->name, iface, ir_var_shader_in);
2001
2002 iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
2003 if (iface)
2004 dest->add_interface(iface->name, iface, ir_var_shader_out);
2005 }
2006 }
2007
2008 extern "C" {
2009
2010 static void
assign_subroutine_indexes(struct _mesa_glsl_parse_state * state)2011 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
2012 {
2013 int j, k;
2014 int index = 0;
2015
2016 for (j = 0; j < state->num_subroutines; j++) {
2017 while (state->subroutines[j]->subroutine_index == -1) {
2018 for (k = 0; k < state->num_subroutines; k++) {
2019 if (state->subroutines[k]->subroutine_index == index)
2020 break;
2021 else if (k == state->num_subroutines - 1) {
2022 state->subroutines[j]->subroutine_index = index;
2023 }
2024 }
2025 index++;
2026 }
2027 }
2028 }
2029
2030 static void
add_builtin_defines(struct _mesa_glsl_parse_state * state,void (* add_builtin_define)(struct glcpp_parser *,const char *,int),struct glcpp_parser * data,unsigned version,bool es)2031 add_builtin_defines(struct _mesa_glsl_parse_state *state,
2032 void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
2033 struct glcpp_parser *data,
2034 unsigned version,
2035 bool es)
2036 {
2037 unsigned gl_version = state->ctx->Extensions.Version;
2038 gl_api api = state->ctx->API;
2039
2040 if (gl_version != 0xff) {
2041 unsigned i;
2042 for (i = 0; i < state->num_supported_versions; i++) {
2043 if (state->supported_versions[i].ver == version &&
2044 state->supported_versions[i].es == es) {
2045 gl_version = state->supported_versions[i].gl_ver;
2046 break;
2047 }
2048 }
2049
2050 if (i == state->num_supported_versions)
2051 return;
2052 }
2053
2054 if (es)
2055 api = API_OPENGLES2;
2056
2057 for (unsigned i = 0;
2058 i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
2059 const _mesa_glsl_extension *extension
2060 = &_mesa_glsl_supported_extensions[i];
2061 if (extension->compatible_with_state(state, api, gl_version)) {
2062 add_builtin_define(data, extension->name, 1);
2063 }
2064 }
2065 }
2066
2067 /* Implements parsing checks that we can't do during parsing */
2068 static void
do_late_parsing_checks(struct _mesa_glsl_parse_state * state)2069 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
2070 {
2071 if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
2072 YYLTYPE loc;
2073 memset(&loc, 0, sizeof(loc));
2074 _mesa_glsl_error(&loc, state, "Compute shaders require "
2075 "GLSL 4.30 or GLSL ES 3.10");
2076 }
2077 }
2078
2079 static void
opt_shader_and_create_symbol_table(struct gl_context * ctx,struct glsl_symbol_table * source_symbols,struct gl_shader * shader)2080 opt_shader_and_create_symbol_table(struct gl_context *ctx,
2081 struct glsl_symbol_table *source_symbols,
2082 struct gl_shader *shader)
2083 {
2084 assert(shader->CompileStatus != COMPILE_FAILURE &&
2085 !shader->ir->is_empty());
2086
2087 struct gl_shader_compiler_options *options =
2088 &ctx->Const.ShaderCompilerOptions[shader->Stage];
2089
2090 /* Do some optimization at compile time to reduce shader IR size
2091 * and reduce later work if the same shader is linked multiple times
2092 */
2093 if (ctx->Const.GLSLOptimizeConservatively) {
2094 /* Run it just once. */
2095 do_common_optimization(shader->ir, false, false, options,
2096 ctx->Const.NativeIntegers);
2097 } else {
2098 /* Repeat it until it stops making changes. */
2099 while (do_common_optimization(shader->ir, false, false, options,
2100 ctx->Const.NativeIntegers))
2101 ;
2102 }
2103
2104 validate_ir_tree(shader->ir);
2105
2106 enum ir_variable_mode other;
2107 switch (shader->Stage) {
2108 case MESA_SHADER_VERTEX:
2109 other = ir_var_shader_in;
2110 break;
2111 case MESA_SHADER_FRAGMENT:
2112 other = ir_var_shader_out;
2113 break;
2114 default:
2115 /* Something invalid to ensure optimize_dead_builtin_uniforms
2116 * doesn't remove anything other than uniforms or constants.
2117 */
2118 other = ir_var_mode_count;
2119 break;
2120 }
2121
2122 optimize_dead_builtin_variables(shader->ir, other);
2123
2124 validate_ir_tree(shader->ir);
2125
2126 /* Retain any live IR, but trash the rest. */
2127 reparent_ir(shader->ir, shader->ir);
2128
2129 /* Destroy the symbol table. Create a new symbol table that contains only
2130 * the variables and functions that still exist in the IR. The symbol
2131 * table will be used later during linking.
2132 *
2133 * There must NOT be any freed objects still referenced by the symbol
2134 * table. That could cause the linker to dereference freed memory.
2135 *
2136 * We don't have to worry about types or interface-types here because those
2137 * are fly-weights that are looked up by glsl_type.
2138 */
2139 _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2140 shader->symbols);
2141 }
2142
2143 static bool
can_skip_compile(struct gl_context * ctx,struct gl_shader * shader,const char * source,bool force_recompile,bool source_has_shader_include)2144 can_skip_compile(struct gl_context *ctx, struct gl_shader *shader,
2145 const char *source, bool force_recompile,
2146 bool source_has_shader_include)
2147 {
2148 if (!force_recompile) {
2149 if (ctx->Cache) {
2150 char buf[41];
2151 disk_cache_compute_key(ctx->Cache, source, strlen(source),
2152 shader->sha1);
2153 if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2154 /* We've seen this shader before and know it compiles */
2155 if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2156 _mesa_sha1_format(buf, shader->sha1);
2157 fprintf(stderr, "deferring compile of shader: %s\n", buf);
2158 }
2159 shader->CompileStatus = COMPILE_SKIPPED;
2160
2161 free((void *)shader->FallbackSource);
2162
2163 /* Copy pre-processed shader include to fallback source otherwise
2164 * we have no guarantee the shader include source tree has not
2165 * changed.
2166 */
2167 shader->FallbackSource = source_has_shader_include ?
2168 strdup(source) : NULL;
2169 return true;
2170 }
2171 }
2172 } else {
2173 /* We should only ever end up here if a re-compile has been forced by a
2174 * shader cache miss. In which case we can skip the compile if its
2175 * already been done by a previous fallback or the initial compile call.
2176 */
2177 if (shader->CompileStatus == COMPILE_SUCCESS)
2178 return true;
2179 }
2180
2181 return false;
2182 }
2183
2184 void
_mesa_glsl_compile_shader(struct gl_context * ctx,struct gl_shader * shader,bool dump_ast,bool dump_hir,bool force_recompile)2185 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2186 bool dump_ast, bool dump_hir, bool force_recompile)
2187 {
2188 const char *source = force_recompile && shader->FallbackSource ?
2189 shader->FallbackSource : shader->Source;
2190
2191 /* Note this will be true for shaders the have #include inside comments
2192 * however that should be rare enough not to worry about.
2193 */
2194 bool source_has_shader_include =
2195 strstr(source, "#include") == NULL ? false : true;
2196
2197 /* If there was no shader include we can check the shader cache and skip
2198 * compilation before we run the preprocessor. We never skip compiling
2199 * shaders that use ARB_shading_language_include because we would need to
2200 * keep duplicate copies of the shader include source tree and paths.
2201 */
2202 if (!source_has_shader_include &&
2203 can_skip_compile(ctx, shader, source, force_recompile, false))
2204 return;
2205
2206 struct _mesa_glsl_parse_state *state =
2207 new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2208
2209 if (ctx->Const.GenerateTemporaryNames)
2210 (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2211 false, true);
2212
2213 if (!source_has_shader_include || !force_recompile) {
2214 state->error = glcpp_preprocess(state, &source, &state->info_log,
2215 add_builtin_defines, state, ctx);
2216 }
2217
2218 /* Now that we have run the preprocessor we can check the shader cache and
2219 * skip compilation if possible for those shaders that contained a shader
2220 * include.
2221 */
2222 if (source_has_shader_include &&
2223 can_skip_compile(ctx, shader, source, force_recompile, true))
2224 return;
2225
2226 if (!state->error) {
2227 _mesa_glsl_lexer_ctor(state, source);
2228 _mesa_glsl_parse(state);
2229 _mesa_glsl_lexer_dtor(state);
2230 do_late_parsing_checks(state);
2231 }
2232
2233 if (dump_ast) {
2234 foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2235 ast->print();
2236 }
2237 printf("\n\n");
2238 }
2239
2240 ralloc_free(shader->ir);
2241 shader->ir = new(shader) exec_list;
2242 if (!state->error && !state->translation_unit.is_empty())
2243 _mesa_ast_to_hir(shader->ir, state);
2244
2245 if (!state->error) {
2246 validate_ir_tree(shader->ir);
2247
2248 /* Print out the unoptimized IR. */
2249 if (dump_hir) {
2250 _mesa_print_ir(stdout, shader->ir, state);
2251 }
2252 }
2253
2254 if (shader->InfoLog)
2255 ralloc_free(shader->InfoLog);
2256
2257 if (!state->error)
2258 set_shader_inout_layout(shader, state);
2259
2260 shader->symbols = new(shader->ir) glsl_symbol_table;
2261 shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2262 shader->InfoLog = state->info_log;
2263 shader->Version = state->language_version;
2264 shader->IsES = state->es_shader;
2265
2266 struct gl_shader_compiler_options *options =
2267 &ctx->Const.ShaderCompilerOptions[shader->Stage];
2268
2269 if (!state->error && !shader->ir->is_empty()) {
2270 if (state->es_shader &&
2271 (options->LowerPrecisionFloat16 || options->LowerPrecisionInt16))
2272 lower_precision(options, shader->ir);
2273 lower_builtins(shader->ir);
2274 assign_subroutine_indexes(state);
2275 lower_subroutine(shader->ir, state);
2276 opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2277 }
2278
2279 if (!force_recompile) {
2280 free((void *)shader->FallbackSource);
2281
2282 /* Copy pre-processed shader include to fallback source otherwise we
2283 * have no guarantee the shader include source tree has not changed.
2284 */
2285 shader->FallbackSource = source_has_shader_include ?
2286 strdup(source) : NULL;
2287 }
2288
2289 delete state->symbols;
2290 ralloc_free(state);
2291
2292 if (ctx->Cache && shader->CompileStatus == COMPILE_SUCCESS) {
2293 char sha1_buf[41];
2294 disk_cache_put_key(ctx->Cache, shader->sha1);
2295 if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2296 _mesa_sha1_format(sha1_buf, shader->sha1);
2297 fprintf(stderr, "marking shader: %s\n", sha1_buf);
2298 }
2299 }
2300 }
2301
2302 } /* extern "C" */
2303 /**
2304 * Do the set of common optimizations passes
2305 *
2306 * \param ir List of instructions to be optimized
2307 * \param linked Is the shader linked? This enables
2308 * optimizations passes that remove code at
2309 * global scope and could cause linking to
2310 * fail.
2311 * \param uniform_locations_assigned Have locations already been assigned for
2312 * uniforms? This prevents the declarations
2313 * of unused uniforms from being removed.
2314 * The setting of this flag only matters if
2315 * \c linked is \c true.
2316 * \param options The driver's preferred shader options.
2317 * \param native_integers Selects optimizations that depend on the
2318 * implementations supporting integers
2319 * natively (as opposed to supporting
2320 * integers in floating point registers).
2321 */
2322 bool
do_common_optimization(exec_list * ir,bool linked,bool uniform_locations_assigned,const struct gl_shader_compiler_options * options,bool native_integers)2323 do_common_optimization(exec_list *ir, bool linked,
2324 bool uniform_locations_assigned,
2325 const struct gl_shader_compiler_options *options,
2326 bool native_integers)
2327 {
2328 const bool debug = false;
2329 bool progress = false;
2330
2331 #define OPT(PASS, ...) do { \
2332 if (debug) { \
2333 fprintf(stderr, "START GLSL optimization %s\n", #PASS); \
2334 const bool opt_progress = PASS(__VA_ARGS__); \
2335 progress = opt_progress || progress; \
2336 if (opt_progress) \
2337 _mesa_print_ir(stderr, ir, NULL); \
2338 fprintf(stderr, "GLSL optimization %s: %s progress\n", \
2339 #PASS, opt_progress ? "made" : "no"); \
2340 } else { \
2341 progress = PASS(__VA_ARGS__) || progress; \
2342 } \
2343 } while (false)
2344
2345 OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2346
2347 if (linked) {
2348 OPT(do_function_inlining, ir);
2349 OPT(do_dead_functions, ir);
2350 OPT(do_structure_splitting, ir);
2351 }
2352 OPT(propagate_invariance, ir);
2353 OPT(do_if_simplification, ir);
2354 OPT(opt_flatten_nested_if_blocks, ir);
2355 OPT(opt_conditional_discard, ir);
2356 OPT(do_copy_propagation_elements, ir);
2357
2358 if (options->OptimizeForAOS && !linked)
2359 OPT(opt_flip_matrices, ir);
2360
2361 if (linked && options->OptimizeForAOS) {
2362 OPT(do_vectorize, ir);
2363 }
2364
2365 if (linked)
2366 OPT(do_dead_code, ir, uniform_locations_assigned);
2367 else
2368 OPT(do_dead_code_unlinked, ir);
2369 OPT(do_dead_code_local, ir);
2370 OPT(do_tree_grafting, ir);
2371 OPT(do_constant_propagation, ir);
2372 if (linked)
2373 OPT(do_constant_variable, ir);
2374 else
2375 OPT(do_constant_variable_unlinked, ir);
2376 OPT(do_constant_folding, ir);
2377 OPT(do_minmax_prune, ir);
2378 OPT(do_rebalance_tree, ir);
2379 OPT(do_algebraic, ir, native_integers, options);
2380 OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2381 options->EmitNoCont, options->EmitNoLoops);
2382 OPT(do_vec_index_to_swizzle, ir);
2383 OPT(lower_vector_insert, ir, false);
2384 OPT(optimize_swizzles, ir);
2385
2386 /* Some drivers only call do_common_optimization() once rather than in a
2387 * loop, and split arrays causes each element of a constant array to
2388 * dereference is own copy of the entire array initilizer. This IR is not
2389 * something that can be generated manually in a shader and is not
2390 * accounted for by NIR optimisations, the result is an exponential slow
2391 * down in compilation speed as a constant arrays element count grows. To
2392 * avoid that here we make sure to always clean up the mess split arrays
2393 * causes to constant arrays.
2394 */
2395 bool array_split = optimize_split_arrays(ir, linked);
2396 if (array_split)
2397 do_constant_propagation(ir);
2398 progress |= array_split;
2399
2400 OPT(optimize_redundant_jumps, ir);
2401
2402 if (options->MaxUnrollIterations) {
2403 loop_state *ls = analyze_loop_variables(ir);
2404 if (ls->loop_found) {
2405 bool loop_progress = unroll_loops(ir, ls, options);
2406 while (loop_progress) {
2407 loop_progress = false;
2408 loop_progress |= do_constant_propagation(ir);
2409 loop_progress |= do_if_simplification(ir);
2410
2411 /* Some drivers only call do_common_optimization() once rather
2412 * than in a loop. So we must call do_lower_jumps() after
2413 * unrolling a loop because for drivers that use LLVM validation
2414 * will fail if a jump is not the last instruction in the block.
2415 * For example the following will fail LLVM validation:
2416 *
2417 * (loop (
2418 * ...
2419 * break
2420 * (assign (x) (var_ref v124) (expression int + (var_ref v124)
2421 * (constant int (1)) ) )
2422 * ))
2423 */
2424 loop_progress |= do_lower_jumps(ir, true, true,
2425 options->EmitNoMainReturn,
2426 options->EmitNoCont,
2427 options->EmitNoLoops);
2428 }
2429 progress |= loop_progress;
2430 }
2431 delete ls;
2432 }
2433
2434 /* If the PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY cap is set, this pass will
2435 * only be called once rather than repeatedly until no further progress is
2436 * made.
2437 *
2438 * If an optimization pass fails to preserve the invariant flag, calling
2439 * the pass only once may result in incorrect code generation. Always call
2440 * propagate_invariance() last to avoid this possibility.
2441 */
2442 OPT(propagate_invariance, ir);
2443
2444 #undef OPT
2445
2446 return progress;
2447 }
2448