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 "builtin_functions.h"
42
43 /**
44 * Format a short human-readable description of the given GLSL version.
45 */
46 const char *
glsl_compute_version_string(void * mem_ctx,bool is_es,unsigned version)47 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
48 {
49 return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
50 version / 100, version % 100);
51 }
52
53
54 static const unsigned known_desktop_glsl_versions[] =
55 { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450, 460 };
56 static const unsigned known_desktop_gl_versions[] =
57 { 20, 21, 30, 31, 32, 33, 40, 41, 42, 43, 44, 45, 46 };
58
59
_mesa_glsl_parse_state(struct gl_context * _ctx,gl_shader_stage stage,void * mem_ctx)60 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
61 gl_shader_stage stage,
62 void *mem_ctx)
63 : ctx(_ctx), exts(&_ctx->Extensions), consts(&_ctx->Const),
64 api(_ctx->API), 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->api) {
421 case API_OPENGL_COMPAT:
422 case API_OPENGL_CORE:
423 this->language_version = this->consts->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->api != API_OPENGL_COMPAT &&
462 !this->consts->AllowGLSLCompatShaders) {
463 _mesa_glsl_error(locp, this,
464 "the compatibility profile is not supported");
465 }
466 } else {
467 _mesa_glsl_error(locp, this,
468 "\"%s\" is not a valid shading language profile; "
469 "if present, it must be \"core\"", ident);
470 }
471 } else {
472 _mesa_glsl_error(locp, this,
473 "illegal text following version number");
474 }
475 }
476
477 this->es_shader = es_token_present;
478 if (version == 100) {
479 if (es_token_present) {
480 _mesa_glsl_error(locp, this,
481 "GLSL 1.00 ES should be selected using "
482 "`#version 100'");
483 } else {
484 this->es_shader = true;
485 }
486 }
487
488 if (this->es_shader) {
489 this->ARB_texture_rectangle_enable = false;
490 }
491
492 if (this->forced_language_version)
493 this->language_version = this->forced_language_version;
494 else
495 this->language_version = version;
496
497 this->compat_shader = compat_token_present ||
498 this->consts->ForceCompatShaders ||
499 (this->api == API_OPENGL_COMPAT &&
500 this->language_version == 140) ||
501 (!this->es_shader && this->language_version < 140);
502
503 set_valid_gl_and_glsl_versions(locp);
504 }
505
506
507 /* This helper function will append the given message to the shader's
508 info log and report it via GL_ARB_debug_output. Per that extension,
509 'type' is one of the enum values classifying the message, and
510 'id' is the implementation-defined ID of the given message. */
511 static void
_mesa_glsl_msg(const YYLTYPE * locp,_mesa_glsl_parse_state * state,GLenum type,const char * fmt,va_list ap)512 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
513 GLenum type, const char *fmt, va_list ap)
514 {
515 bool error = (type == MESA_DEBUG_TYPE_ERROR);
516 GLuint msg_id = 0;
517
518 assert(state->info_log != NULL);
519
520 /* Get the offset that the new message will be written to. */
521 int msg_offset = strlen(state->info_log);
522
523 if (locp->path) {
524 ralloc_asprintf_append(&state->info_log, "\"%s\"", locp->path);
525 } else {
526 ralloc_asprintf_append(&state->info_log, "%u", locp->source);
527 }
528 ralloc_asprintf_append(&state->info_log, ":%u(%u): %s: ",
529 locp->first_line, locp->first_column,
530 error ? "error" : "warning");
531
532 ralloc_vasprintf_append(&state->info_log, fmt, ap);
533
534 const char *const msg = &state->info_log[msg_offset];
535 struct gl_context *ctx = state->ctx;
536
537 /* Report the error via GL_ARB_debug_output. */
538 _mesa_shader_debug(ctx, type, &msg_id, msg);
539
540 ralloc_strcat(&state->info_log, "\n");
541 }
542
543 void
_mesa_glsl_error(YYLTYPE * locp,_mesa_glsl_parse_state * state,const char * fmt,...)544 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
545 const char *fmt, ...)
546 {
547 va_list ap;
548
549 state->error = true;
550
551 va_start(ap, fmt);
552 _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
553 va_end(ap);
554 }
555
556
557 void
_mesa_glsl_warning(const YYLTYPE * locp,_mesa_glsl_parse_state * state,const char * fmt,...)558 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
559 const char *fmt, ...)
560 {
561 if (state->warnings_enabled) {
562 va_list ap;
563
564 va_start(ap, fmt);
565 _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
566 va_end(ap);
567 }
568 }
569
570
571 /**
572 * Enum representing the possible behaviors that can be specified in
573 * an #extension directive.
574 */
575 enum ext_behavior {
576 extension_disable,
577 extension_enable,
578 extension_require,
579 extension_warn
580 };
581
582 /**
583 * Element type for _mesa_glsl_supported_extensions
584 */
585 struct _mesa_glsl_extension {
586 /**
587 * Name of the extension when referred to in a GLSL extension
588 * statement
589 */
590 const char *name;
591
592 /**
593 * Whether this extension is a part of AEP
594 */
595 bool aep;
596
597 /**
598 * Predicate that checks whether the relevant extension is available for
599 * this context.
600 */
601 bool (*available_pred)(const struct gl_extensions *,
602 gl_api api, uint8_t version);
603
604 /**
605 * Flag in the _mesa_glsl_parse_state struct that should be set
606 * when this extension is enabled.
607 *
608 * See note in _mesa_glsl_extension::supported_flag about "pointer
609 * to member" types.
610 */
611 bool _mesa_glsl_parse_state::* enable_flag;
612
613 /**
614 * Flag in the _mesa_glsl_parse_state struct that should be set
615 * when the shader requests "warn" behavior for this extension.
616 *
617 * See note in _mesa_glsl_extension::supported_flag about "pointer
618 * to member" types.
619 */
620 bool _mesa_glsl_parse_state::* warn_flag;
621
622
623 bool compatible_with_state(const _mesa_glsl_parse_state *state,
624 gl_api api, uint8_t gl_version) const;
625 void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
626 };
627
628 /** Checks if the context supports a user-facing extension */
629 #define EXT(name_str, driver_cap, ...) \
630 static UNUSED bool \
631 has_##name_str(const struct gl_extensions *exts, gl_api api, uint8_t version) \
632 { \
633 return exts->driver_cap && (version >= \
634 _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
635 }
636 #include "main/extensions_table.h"
637 #undef EXT
638
639 #define EXT(NAME) \
640 { "GL_" #NAME, false, has_##NAME, \
641 &_mesa_glsl_parse_state::NAME##_enable, \
642 &_mesa_glsl_parse_state::NAME##_warn }
643
644 #define EXT_AEP(NAME) \
645 { "GL_" #NAME, true, has_##NAME, \
646 &_mesa_glsl_parse_state::NAME##_enable, \
647 &_mesa_glsl_parse_state::NAME##_warn }
648
649 /**
650 * Table of extensions that can be enabled/disabled within a shader,
651 * and the conditions under which they are supported.
652 */
653 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
654 /* ARB extensions go here, sorted alphabetically.
655 */
656 EXT(ARB_ES3_1_compatibility),
657 EXT(ARB_ES3_2_compatibility),
658 EXT(ARB_arrays_of_arrays),
659 EXT(ARB_bindless_texture),
660 EXT(ARB_compatibility),
661 EXT(ARB_compute_shader),
662 EXT(ARB_compute_variable_group_size),
663 EXT(ARB_conservative_depth),
664 EXT(ARB_cull_distance),
665 EXT(ARB_derivative_control),
666 EXT(ARB_draw_buffers),
667 EXT(ARB_draw_instanced),
668 EXT(ARB_enhanced_layouts),
669 EXT(ARB_explicit_attrib_location),
670 EXT(ARB_explicit_uniform_location),
671 EXT(ARB_fragment_coord_conventions),
672 EXT(ARB_fragment_layer_viewport),
673 EXT(ARB_fragment_shader_interlock),
674 EXT(ARB_gpu_shader5),
675 EXT(ARB_gpu_shader_fp64),
676 EXT(ARB_gpu_shader_int64),
677 EXT(ARB_post_depth_coverage),
678 EXT(ARB_sample_shading),
679 EXT(ARB_separate_shader_objects),
680 EXT(ARB_shader_atomic_counter_ops),
681 EXT(ARB_shader_atomic_counters),
682 EXT(ARB_shader_ballot),
683 EXT(ARB_shader_bit_encoding),
684 EXT(ARB_shader_clock),
685 EXT(ARB_shader_draw_parameters),
686 EXT(ARB_shader_group_vote),
687 EXT(ARB_shader_image_load_store),
688 EXT(ARB_shader_image_size),
689 EXT(ARB_shader_precision),
690 EXT(ARB_shader_stencil_export),
691 EXT(ARB_shader_storage_buffer_object),
692 EXT(ARB_shader_subroutine),
693 EXT(ARB_shader_texture_image_samples),
694 EXT(ARB_shader_texture_lod),
695 EXT(ARB_shader_viewport_layer_array),
696 EXT(ARB_shading_language_420pack),
697 EXT(ARB_shading_language_include),
698 EXT(ARB_shading_language_packing),
699 EXT(ARB_sparse_texture2),
700 EXT(ARB_sparse_texture_clamp),
701 EXT(ARB_tessellation_shader),
702 EXT(ARB_texture_cube_map_array),
703 EXT(ARB_texture_gather),
704 EXT(ARB_texture_multisample),
705 EXT(ARB_texture_query_levels),
706 EXT(ARB_texture_query_lod),
707 EXT(ARB_texture_rectangle),
708 EXT(ARB_uniform_buffer_object),
709 EXT(ARB_vertex_attrib_64bit),
710 EXT(ARB_viewport_array),
711
712 /* KHR extensions go here, sorted alphabetically.
713 */
714 EXT_AEP(KHR_blend_equation_advanced),
715
716 /* OES extensions go here, sorted alphabetically.
717 */
718 EXT(OES_EGL_image_external),
719 EXT(OES_EGL_image_external_essl3),
720 EXT(OES_geometry_point_size),
721 EXT(OES_geometry_shader),
722 EXT(OES_gpu_shader5),
723 EXT(OES_primitive_bounding_box),
724 EXT_AEP(OES_sample_variables),
725 EXT_AEP(OES_shader_image_atomic),
726 EXT(OES_shader_io_blocks),
727 EXT_AEP(OES_shader_multisample_interpolation),
728 EXT(OES_standard_derivatives),
729 EXT(OES_tessellation_point_size),
730 EXT(OES_tessellation_shader),
731 EXT(OES_texture_3D),
732 EXT(OES_texture_buffer),
733 EXT(OES_texture_cube_map_array),
734 EXT_AEP(OES_texture_storage_multisample_2d_array),
735 EXT(OES_viewport_array),
736
737 /* All other extensions go here, sorted alphabetically.
738 */
739 EXT(AMD_conservative_depth),
740 EXT(AMD_gpu_shader_int64),
741 EXT(AMD_shader_stencil_export),
742 EXT(AMD_shader_trinary_minmax),
743 EXT(AMD_texture_texture4),
744 EXT(AMD_vertex_shader_layer),
745 EXT(AMD_vertex_shader_viewport_index),
746 EXT(ANDROID_extension_pack_es31a),
747 EXT(ARM_shader_framebuffer_fetch_depth_stencil),
748 EXT(EXT_blend_func_extended),
749 EXT(EXT_demote_to_helper_invocation),
750 EXT(EXT_frag_depth),
751 EXT(EXT_draw_buffers),
752 EXT(EXT_draw_instanced),
753 EXT(EXT_clip_cull_distance),
754 EXT(EXT_geometry_point_size),
755 EXT_AEP(EXT_geometry_shader),
756 EXT(EXT_gpu_shader4),
757 EXT_AEP(EXT_gpu_shader5),
758 EXT_AEP(EXT_primitive_bounding_box),
759 EXT(EXT_separate_shader_objects),
760 EXT(EXT_shader_framebuffer_fetch),
761 EXT(EXT_shader_framebuffer_fetch_non_coherent),
762 EXT(EXT_shader_group_vote),
763 EXT(EXT_shader_image_load_formatted),
764 EXT(EXT_shader_image_load_store),
765 EXT(EXT_shader_implicit_conversions),
766 EXT(EXT_shader_integer_mix),
767 EXT_AEP(EXT_shader_io_blocks),
768 EXT(EXT_shader_samples_identical),
769 EXT(EXT_tessellation_point_size),
770 EXT_AEP(EXT_tessellation_shader),
771 EXT(EXT_texture_array),
772 EXT_AEP(EXT_texture_buffer),
773 EXT_AEP(EXT_texture_cube_map_array),
774 EXT(EXT_texture_query_lod),
775 EXT(EXT_texture_shadow_lod),
776 EXT(INTEL_conservative_rasterization),
777 EXT(INTEL_shader_atomic_float_minmax),
778 EXT(INTEL_shader_integer_functions2),
779 EXT(MESA_shader_integer_functions),
780 EXT(NV_compute_shader_derivatives),
781 EXT(NV_fragment_shader_interlock),
782 EXT(NV_image_formats),
783 EXT(NV_shader_atomic_float),
784 EXT(NV_shader_atomic_int64),
785 EXT(NV_viewport_array2),
786 };
787
788 #undef EXT
789
790
791 /**
792 * Determine whether a given extension is compatible with the target,
793 * API, and extension information in the current parser state.
794 */
compatible_with_state(const _mesa_glsl_parse_state * state,gl_api api,uint8_t gl_version) const795 bool _mesa_glsl_extension::compatible_with_state(
796 const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
797 {
798 return this->available_pred(state->exts, api, gl_version);
799 }
800
801 /**
802 * Set the appropriate flags in the parser state to establish the
803 * given behavior for this extension.
804 */
set_flags(_mesa_glsl_parse_state * state,ext_behavior behavior) const805 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
806 ext_behavior behavior) const
807 {
808 /* Note: the ->* operator indexes into state by the
809 * offsets this->enable_flag and this->warn_flag. See
810 * _mesa_glsl_extension::supported_flag for more info.
811 */
812 state->*(this->enable_flag) = (behavior != extension_disable);
813 state->*(this->warn_flag) = (behavior == extension_warn);
814 }
815
816 /**
817 * Find an extension by name in _mesa_glsl_supported_extensions. If
818 * the name is not found, return NULL.
819 */
find_extension(const char * name)820 static const _mesa_glsl_extension *find_extension(const char *name)
821 {
822 for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
823 if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
824 return &_mesa_glsl_supported_extensions[i];
825 }
826 }
827 return NULL;
828 }
829
830 bool
_mesa_glsl_process_extension(const char * name,YYLTYPE * name_locp,const char * behavior_string,YYLTYPE * behavior_locp,_mesa_glsl_parse_state * state)831 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
832 const char *behavior_string, YYLTYPE *behavior_locp,
833 _mesa_glsl_parse_state *state)
834 {
835 uint8_t gl_version = state->exts->Version;
836 gl_api api = state->api;
837 ext_behavior behavior;
838 if (strcmp(behavior_string, "warn") == 0) {
839 behavior = extension_warn;
840 } else if (strcmp(behavior_string, "require") == 0) {
841 behavior = extension_require;
842 } else if (strcmp(behavior_string, "enable") == 0) {
843 behavior = extension_enable;
844 } else if (strcmp(behavior_string, "disable") == 0) {
845 behavior = extension_disable;
846 } else {
847 _mesa_glsl_error(behavior_locp, state,
848 "unknown extension behavior `%s'",
849 behavior_string);
850 return false;
851 }
852
853 /* If we're in a desktop context but with an ES shader, use an ES API enum
854 * to verify extension availability.
855 */
856 if (state->es_shader && api != API_OPENGLES2)
857 api = API_OPENGLES2;
858 /* Use the language-version derived GL version to extension checks, unless
859 * we're using meta, which sets the version to the max.
860 */
861 if (gl_version != 0xff)
862 gl_version = state->gl_version;
863
864 if (strcmp(name, "all") == 0) {
865 if ((behavior == extension_enable) || (behavior == extension_require)) {
866 _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
867 (behavior == extension_enable)
868 ? "enable" : "require");
869 return false;
870 } else {
871 for (unsigned i = 0;
872 i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
873 const _mesa_glsl_extension *extension
874 = &_mesa_glsl_supported_extensions[i];
875 if (extension->compatible_with_state(state, api, gl_version)) {
876 _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
877 }
878 }
879 }
880 } else {
881 const _mesa_glsl_extension *extension = find_extension(name);
882 if (extension &&
883 (extension->compatible_with_state(state, api, gl_version) ||
884 (state->consts->AllowGLSLCompatShaders &&
885 extension->compatible_with_state(state, API_OPENGL_COMPAT, gl_version)))) {
886 extension->set_flags(state, behavior);
887 if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
888 for (unsigned i = 0;
889 i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
890 const _mesa_glsl_extension *extension =
891 &_mesa_glsl_supported_extensions[i];
892
893 if (!extension->aep)
894 continue;
895 /* AEP should not be enabled if all of the sub-extensions can't
896 * also be enabled. This is not the proper layer to do such
897 * error-checking though.
898 */
899 assert(extension->compatible_with_state(state, api, gl_version));
900 extension->set_flags(state, behavior);
901 }
902 }
903 } else {
904 static const char fmt[] = "extension `%s' unsupported in %s shader";
905
906 if (behavior == extension_require) {
907 _mesa_glsl_error(name_locp, state, fmt,
908 name, _mesa_shader_stage_to_string(state->stage));
909 return false;
910 } else {
911 _mesa_glsl_warning(name_locp, state, fmt,
912 name, _mesa_shader_stage_to_string(state->stage));
913 }
914 }
915 }
916
917 return true;
918 }
919
920
921 /**
922 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
923 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
924 * (process_array_constructor, et al) sufficient information to do type
925 * checking.
926 *
927 * Operates on assignments involving an aggregate initializer. E.g.,
928 *
929 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
930 *
931 * or more ridiculously,
932 *
933 * struct S {
934 * vec4 v[2];
935 * };
936 *
937 * struct {
938 * S a[2], b;
939 * int c;
940 * } aggregate = {
941 * {
942 * {
943 * {
944 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
945 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
946 * } // a[0].v
947 * }, // a[0]
948 * {
949 * {
950 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
951 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
952 * } // a[1].v
953 * } // a[1]
954 * }, // a
955 * {
956 * {
957 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
958 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
959 * } // b.v
960 * }, // b
961 * 4 // c
962 * };
963 *
964 * This pass is necessary because the right-hand side of <type> e = { ... }
965 * doesn't contain sufficient information to determine if the types match.
966 */
967 void
_mesa_ast_set_aggregate_type(const glsl_type * type,ast_expression * expr)968 _mesa_ast_set_aggregate_type(const glsl_type *type,
969 ast_expression *expr)
970 {
971 ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
972 ai->constructor_type = type;
973
974 /* If the aggregate is an array, recursively set its elements' types. */
975 if (type->is_array()) {
976 /* Each array element has the type type->fields.array.
977 *
978 * E.g., if <type> if struct S[2] we want to set each element's type to
979 * struct S.
980 */
981 for (exec_node *expr_node = ai->expressions.get_head_raw();
982 !expr_node->is_tail_sentinel();
983 expr_node = expr_node->next) {
984 ast_expression *expr = exec_node_data(ast_expression, expr_node,
985 link);
986
987 if (expr->oper == ast_aggregate)
988 _mesa_ast_set_aggregate_type(type->fields.array, expr);
989 }
990
991 /* If the aggregate is a struct, recursively set its fields' types. */
992 } else if (type->is_struct()) {
993 exec_node *expr_node = ai->expressions.get_head_raw();
994
995 /* Iterate through the struct's fields. */
996 for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
997 i++, expr_node = expr_node->next) {
998 ast_expression *expr = exec_node_data(ast_expression, expr_node,
999 link);
1000
1001 if (expr->oper == ast_aggregate) {
1002 _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
1003 }
1004 }
1005 /* If the aggregate is a matrix, set its columns' types. */
1006 } else if (type->is_matrix()) {
1007 for (exec_node *expr_node = ai->expressions.get_head_raw();
1008 !expr_node->is_tail_sentinel();
1009 expr_node = expr_node->next) {
1010 ast_expression *expr = exec_node_data(ast_expression, expr_node,
1011 link);
1012
1013 if (expr->oper == ast_aggregate)
1014 _mesa_ast_set_aggregate_type(type->column_type(), expr);
1015 }
1016 }
1017 }
1018
1019 void
_mesa_ast_process_interface_block(YYLTYPE * locp,_mesa_glsl_parse_state * state,ast_interface_block * const block,const struct ast_type_qualifier & q)1020 _mesa_ast_process_interface_block(YYLTYPE *locp,
1021 _mesa_glsl_parse_state *state,
1022 ast_interface_block *const block,
1023 const struct ast_type_qualifier &q)
1024 {
1025 if (q.flags.q.buffer) {
1026 if (!state->has_shader_storage_buffer_objects()) {
1027 _mesa_glsl_error(locp, state,
1028 "#version 430 / GL_ARB_shader_storage_buffer_object "
1029 "required for defining shader storage blocks");
1030 } else if (state->ARB_shader_storage_buffer_object_warn) {
1031 _mesa_glsl_warning(locp, state,
1032 "#version 430 / GL_ARB_shader_storage_buffer_object "
1033 "required for defining shader storage blocks");
1034 }
1035 } else if (q.flags.q.uniform) {
1036 if (!state->has_uniform_buffer_objects()) {
1037 _mesa_glsl_error(locp, state,
1038 "#version 140 / GL_ARB_uniform_buffer_object "
1039 "required for defining uniform blocks");
1040 } else if (state->ARB_uniform_buffer_object_warn) {
1041 _mesa_glsl_warning(locp, state,
1042 "#version 140 / GL_ARB_uniform_buffer_object "
1043 "required for defining uniform blocks");
1044 }
1045 } else {
1046 if (!state->has_shader_io_blocks()) {
1047 if (state->es_shader) {
1048 _mesa_glsl_error(locp, state,
1049 "GL_OES_shader_io_blocks or #version 320 "
1050 "required for using interface blocks");
1051 } else {
1052 _mesa_glsl_error(locp, state,
1053 "#version 150 required for using "
1054 "interface blocks");
1055 }
1056 }
1057 }
1058
1059 /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
1060 * "It is illegal to have an input block in a vertex shader
1061 * or an output block in a fragment shader"
1062 */
1063 if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
1064 _mesa_glsl_error(locp, state,
1065 "`in' interface block is not allowed for "
1066 "a vertex shader");
1067 } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1068 _mesa_glsl_error(locp, state,
1069 "`out' interface block is not allowed for "
1070 "a fragment shader");
1071 }
1072
1073 /* Since block arrays require names, and both features are added in
1074 * the same language versions, we don't have to explicitly
1075 * version-check both things.
1076 */
1077 if (block->instance_name != NULL) {
1078 state->check_version(150, 300, locp, "interface blocks with "
1079 "an instance name are not allowed");
1080 }
1081
1082 ast_type_qualifier::bitset_t interface_type_mask;
1083 struct ast_type_qualifier temp_type_qualifier;
1084
1085 /* Get a bitmask containing only the in/out/uniform/buffer
1086 * flags, allowing us to ignore other irrelevant flags like
1087 * interpolation qualifiers.
1088 */
1089 temp_type_qualifier.flags.i = 0;
1090 temp_type_qualifier.flags.q.uniform = true;
1091 temp_type_qualifier.flags.q.in = true;
1092 temp_type_qualifier.flags.q.out = true;
1093 temp_type_qualifier.flags.q.buffer = true;
1094 temp_type_qualifier.flags.q.patch = true;
1095 interface_type_mask = temp_type_qualifier.flags.i;
1096
1097 /* Get the block's interface qualifier. The interface_qualifier
1098 * production rule guarantees that only one bit will be set (and
1099 * it will be in/out/uniform).
1100 */
1101 ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1102
1103 block->default_layout.flags.i |= block_interface_qualifier;
1104
1105 if (state->stage == MESA_SHADER_GEOMETRY &&
1106 state->has_explicit_attrib_stream() &&
1107 block->default_layout.flags.q.out) {
1108 /* Assign global layout's stream value. */
1109 block->default_layout.flags.q.stream = 1;
1110 block->default_layout.flags.q.explicit_stream = 0;
1111 block->default_layout.stream = state->out_qualifier->stream;
1112 }
1113
1114 if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1115 /* Assign global layout's xfb_buffer value. */
1116 block->default_layout.flags.q.xfb_buffer = 1;
1117 block->default_layout.flags.q.explicit_xfb_buffer = 0;
1118 block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1119 }
1120
1121 foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1122 ast_type_qualifier& qualifier = member->type->qualifier;
1123 if ((qualifier.flags.i & interface_type_mask) == 0) {
1124 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1125 * "If no optional qualifier is used in a member declaration, the
1126 * qualifier of the variable is just in, out, or uniform as declared
1127 * by interface-qualifier."
1128 */
1129 qualifier.flags.i |= block_interface_qualifier;
1130 } else if ((qualifier.flags.i & interface_type_mask) !=
1131 block_interface_qualifier) {
1132 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1133 * "If optional qualifiers are used, they can include interpolation
1134 * and storage qualifiers and they must declare an input, output,
1135 * or uniform variable consistent with the interface qualifier of
1136 * the block."
1137 */
1138 _mesa_glsl_error(locp, state,
1139 "uniform/in/out qualifier on "
1140 "interface block member does not match "
1141 "the interface block");
1142 }
1143
1144 if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1145 _mesa_glsl_error(locp, state,
1146 "invariant qualifiers can be used only "
1147 "in interface block members for shader "
1148 "inputs or outputs");
1149 }
1150 }
1151
1152 static void
_mesa_ast_type_qualifier_print(const struct ast_type_qualifier * q)1153 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1154 {
1155 if (q->is_subroutine_decl())
1156 printf("subroutine ");
1157
1158 if (q->subroutine_list) {
1159 printf("subroutine (");
1160 q->subroutine_list->print();
1161 printf(")");
1162 }
1163
1164 if (q->flags.q.constant)
1165 printf("const ");
1166
1167 if (q->flags.q.invariant)
1168 printf("invariant ");
1169
1170 if (q->flags.q.attribute)
1171 printf("attribute ");
1172
1173 if (q->flags.q.varying)
1174 printf("varying ");
1175
1176 if (q->flags.q.in && q->flags.q.out)
1177 printf("inout ");
1178 else {
1179 if (q->flags.q.in)
1180 printf("in ");
1181
1182 if (q->flags.q.out)
1183 printf("out ");
1184 }
1185
1186 if (q->flags.q.centroid)
1187 printf("centroid ");
1188 if (q->flags.q.sample)
1189 printf("sample ");
1190 if (q->flags.q.patch)
1191 printf("patch ");
1192 if (q->flags.q.uniform)
1193 printf("uniform ");
1194 if (q->flags.q.buffer)
1195 printf("buffer ");
1196 if (q->flags.q.smooth)
1197 printf("smooth ");
1198 if (q->flags.q.flat)
1199 printf("flat ");
1200 if (q->flags.q.noperspective)
1201 printf("noperspective ");
1202 }
1203
1204
1205 void
print(void) const1206 ast_node::print(void) const
1207 {
1208 printf("unhandled node ");
1209 }
1210
1211
ast_node(void)1212 ast_node::ast_node(void)
1213 {
1214 this->location.path = NULL;
1215 this->location.source = 0;
1216 this->location.first_line = 0;
1217 this->location.first_column = 0;
1218 this->location.last_line = 0;
1219 this->location.last_column = 0;
1220 }
1221
1222
1223 static void
ast_opt_array_dimensions_print(const ast_array_specifier * array_specifier)1224 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1225 {
1226 if (array_specifier)
1227 array_specifier->print();
1228 }
1229
1230
1231 void
print(void) const1232 ast_compound_statement::print(void) const
1233 {
1234 printf("{\n");
1235
1236 foreach_list_typed(ast_node, ast, link, &this->statements) {
1237 ast->print();
1238 }
1239
1240 printf("}\n");
1241 }
1242
1243
ast_compound_statement(int new_scope,ast_node * statements)1244 ast_compound_statement::ast_compound_statement(int new_scope,
1245 ast_node *statements)
1246 {
1247 this->new_scope = new_scope;
1248
1249 if (statements != NULL) {
1250 this->statements.push_degenerate_list_at_head(&statements->link);
1251 }
1252 }
1253
1254
1255 void
print(void) const1256 ast_expression::print(void) const
1257 {
1258 switch (oper) {
1259 case ast_assign:
1260 case ast_mul_assign:
1261 case ast_div_assign:
1262 case ast_mod_assign:
1263 case ast_add_assign:
1264 case ast_sub_assign:
1265 case ast_ls_assign:
1266 case ast_rs_assign:
1267 case ast_and_assign:
1268 case ast_xor_assign:
1269 case ast_or_assign:
1270 subexpressions[0]->print();
1271 printf("%s ", operator_string(oper));
1272 subexpressions[1]->print();
1273 break;
1274
1275 case ast_field_selection:
1276 subexpressions[0]->print();
1277 printf(". %s ", primary_expression.identifier);
1278 break;
1279
1280 case ast_plus:
1281 case ast_neg:
1282 case ast_bit_not:
1283 case ast_logic_not:
1284 case ast_pre_inc:
1285 case ast_pre_dec:
1286 printf("%s ", operator_string(oper));
1287 subexpressions[0]->print();
1288 break;
1289
1290 case ast_post_inc:
1291 case ast_post_dec:
1292 subexpressions[0]->print();
1293 printf("%s ", operator_string(oper));
1294 break;
1295
1296 case ast_conditional:
1297 subexpressions[0]->print();
1298 printf("? ");
1299 subexpressions[1]->print();
1300 printf(": ");
1301 subexpressions[2]->print();
1302 break;
1303
1304 case ast_array_index:
1305 subexpressions[0]->print();
1306 printf("[ ");
1307 subexpressions[1]->print();
1308 printf("] ");
1309 break;
1310
1311 case ast_function_call: {
1312 subexpressions[0]->print();
1313 printf("( ");
1314
1315 foreach_list_typed (ast_node, ast, link, &this->expressions) {
1316 if (&ast->link != this->expressions.get_head())
1317 printf(", ");
1318
1319 ast->print();
1320 }
1321
1322 printf(") ");
1323 break;
1324 }
1325
1326 case ast_identifier:
1327 printf("%s ", primary_expression.identifier);
1328 break;
1329
1330 case ast_int_constant:
1331 printf("%d ", primary_expression.int_constant);
1332 break;
1333
1334 case ast_uint_constant:
1335 printf("%u ", primary_expression.uint_constant);
1336 break;
1337
1338 case ast_float_constant:
1339 printf("%f ", primary_expression.float_constant);
1340 break;
1341
1342 case ast_double_constant:
1343 printf("%f ", primary_expression.double_constant);
1344 break;
1345
1346 case ast_int64_constant:
1347 printf("%" PRId64 " ", primary_expression.int64_constant);
1348 break;
1349
1350 case ast_uint64_constant:
1351 printf("%" PRIu64 " ", primary_expression.uint64_constant);
1352 break;
1353
1354 case ast_bool_constant:
1355 printf("%s ",
1356 primary_expression.bool_constant
1357 ? "true" : "false");
1358 break;
1359
1360 case ast_sequence: {
1361 printf("( ");
1362 foreach_list_typed (ast_node, ast, link, & this->expressions) {
1363 if (&ast->link != this->expressions.get_head())
1364 printf(", ");
1365
1366 ast->print();
1367 }
1368 printf(") ");
1369 break;
1370 }
1371
1372 case ast_aggregate: {
1373 printf("{ ");
1374 foreach_list_typed (ast_node, ast, link, & this->expressions) {
1375 if (&ast->link != this->expressions.get_head())
1376 printf(", ");
1377
1378 ast->print();
1379 }
1380 printf("} ");
1381 break;
1382 }
1383
1384 default:
1385 assert(0);
1386 break;
1387 }
1388 }
1389
ast_expression(int oper,ast_expression * ex0,ast_expression * ex1,ast_expression * ex2)1390 ast_expression::ast_expression(int oper,
1391 ast_expression *ex0,
1392 ast_expression *ex1,
1393 ast_expression *ex2) :
1394 primary_expression()
1395 {
1396 this->oper = ast_operators(oper);
1397 this->subexpressions[0] = ex0;
1398 this->subexpressions[1] = ex1;
1399 this->subexpressions[2] = ex2;
1400 this->non_lvalue_description = NULL;
1401 this->is_lhs = false;
1402 }
1403
1404
1405 void
print(void) const1406 ast_expression_statement::print(void) const
1407 {
1408 if (expression)
1409 expression->print();
1410
1411 printf("; ");
1412 }
1413
1414
ast_expression_statement(ast_expression * ex)1415 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1416 expression(ex)
1417 {
1418 /* empty */
1419 }
1420
1421
1422 void
print(void) const1423 ast_function::print(void) const
1424 {
1425 return_type->print();
1426 printf(" %s (", identifier);
1427
1428 foreach_list_typed(ast_node, ast, link, & this->parameters) {
1429 ast->print();
1430 }
1431
1432 printf(")");
1433 }
1434
1435
ast_function(void)1436 ast_function::ast_function(void)
1437 : return_type(NULL), identifier(NULL), is_definition(false),
1438 signature(NULL)
1439 {
1440 /* empty */
1441 }
1442
1443
1444 void
print(void) const1445 ast_fully_specified_type::print(void) const
1446 {
1447 _mesa_ast_type_qualifier_print(& qualifier);
1448 specifier->print();
1449 }
1450
1451
1452 void
print(void) const1453 ast_parameter_declarator::print(void) const
1454 {
1455 type->print();
1456 if (identifier)
1457 printf("%s ", identifier);
1458 ast_opt_array_dimensions_print(array_specifier);
1459 }
1460
1461
1462 void
print(void) const1463 ast_function_definition::print(void) const
1464 {
1465 prototype->print();
1466 body->print();
1467 }
1468
1469
1470 void
print(void) const1471 ast_declaration::print(void) const
1472 {
1473 printf("%s ", identifier);
1474 ast_opt_array_dimensions_print(array_specifier);
1475
1476 if (initializer) {
1477 printf("= ");
1478 initializer->print();
1479 }
1480 }
1481
1482
ast_declaration(const char * identifier,ast_array_specifier * array_specifier,ast_expression * initializer)1483 ast_declaration::ast_declaration(const char *identifier,
1484 ast_array_specifier *array_specifier,
1485 ast_expression *initializer)
1486 {
1487 this->identifier = identifier;
1488 this->array_specifier = array_specifier;
1489 this->initializer = initializer;
1490 }
1491
1492
1493 void
print(void) const1494 ast_declarator_list::print(void) const
1495 {
1496 assert(type || invariant);
1497
1498 if (type)
1499 type->print();
1500 else if (invariant)
1501 printf("invariant ");
1502 else
1503 printf("precise ");
1504
1505 foreach_list_typed (ast_node, ast, link, & this->declarations) {
1506 if (&ast->link != this->declarations.get_head())
1507 printf(", ");
1508
1509 ast->print();
1510 }
1511
1512 printf("; ");
1513 }
1514
1515
ast_declarator_list(ast_fully_specified_type * type)1516 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1517 {
1518 this->type = type;
1519 this->invariant = false;
1520 this->precise = false;
1521 }
1522
1523 void
print(void) const1524 ast_jump_statement::print(void) const
1525 {
1526 switch (mode) {
1527 case ast_continue:
1528 printf("continue; ");
1529 break;
1530 case ast_break:
1531 printf("break; ");
1532 break;
1533 case ast_return:
1534 printf("return ");
1535 if (opt_return_value)
1536 opt_return_value->print();
1537
1538 printf("; ");
1539 break;
1540 case ast_discard:
1541 printf("discard; ");
1542 break;
1543 }
1544 }
1545
1546
ast_jump_statement(int mode,ast_expression * return_value)1547 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1548 : opt_return_value(NULL)
1549 {
1550 this->mode = ast_jump_modes(mode);
1551
1552 if (mode == ast_return)
1553 opt_return_value = return_value;
1554 }
1555
1556
1557 void
print(void) const1558 ast_demote_statement::print(void) const
1559 {
1560 printf("demote; ");
1561 }
1562
1563
1564 void
print(void) const1565 ast_selection_statement::print(void) const
1566 {
1567 printf("if ( ");
1568 condition->print();
1569 printf(") ");
1570
1571 then_statement->print();
1572
1573 if (else_statement) {
1574 printf("else ");
1575 else_statement->print();
1576 }
1577 }
1578
1579
ast_selection_statement(ast_expression * condition,ast_node * then_statement,ast_node * else_statement)1580 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1581 ast_node *then_statement,
1582 ast_node *else_statement)
1583 {
1584 this->condition = condition;
1585 this->then_statement = then_statement;
1586 this->else_statement = else_statement;
1587 }
1588
1589
1590 void
print(void) const1591 ast_switch_statement::print(void) const
1592 {
1593 printf("switch ( ");
1594 test_expression->print();
1595 printf(") ");
1596
1597 body->print();
1598 }
1599
1600
ast_switch_statement(ast_expression * test_expression,ast_node * body)1601 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1602 ast_node *body)
1603 {
1604 this->test_expression = test_expression;
1605 this->body = body;
1606 this->test_val = NULL;
1607 }
1608
1609
1610 void
print(void) const1611 ast_switch_body::print(void) const
1612 {
1613 printf("{\n");
1614 if (stmts != NULL) {
1615 stmts->print();
1616 }
1617 printf("}\n");
1618 }
1619
1620
ast_switch_body(ast_case_statement_list * stmts)1621 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1622 {
1623 this->stmts = stmts;
1624 }
1625
1626
print(void) const1627 void ast_case_label::print(void) const
1628 {
1629 if (test_value != NULL) {
1630 printf("case ");
1631 test_value->print();
1632 printf(": ");
1633 } else {
1634 printf("default: ");
1635 }
1636 }
1637
1638
ast_case_label(ast_expression * test_value)1639 ast_case_label::ast_case_label(ast_expression *test_value)
1640 {
1641 this->test_value = test_value;
1642 }
1643
1644
print(void) const1645 void ast_case_label_list::print(void) const
1646 {
1647 foreach_list_typed(ast_node, ast, link, & this->labels) {
1648 ast->print();
1649 }
1650 printf("\n");
1651 }
1652
1653
ast_case_label_list(void)1654 ast_case_label_list::ast_case_label_list(void)
1655 {
1656 }
1657
1658
print(void) const1659 void ast_case_statement::print(void) const
1660 {
1661 labels->print();
1662 foreach_list_typed(ast_node, ast, link, & this->stmts) {
1663 ast->print();
1664 printf("\n");
1665 }
1666 }
1667
1668
ast_case_statement(ast_case_label_list * labels)1669 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1670 {
1671 this->labels = labels;
1672 }
1673
1674
print(void) const1675 void ast_case_statement_list::print(void) const
1676 {
1677 foreach_list_typed(ast_node, ast, link, & this->cases) {
1678 ast->print();
1679 }
1680 }
1681
1682
ast_case_statement_list(void)1683 ast_case_statement_list::ast_case_statement_list(void)
1684 {
1685 }
1686
1687
1688 void
print(void) const1689 ast_iteration_statement::print(void) const
1690 {
1691 switch (mode) {
1692 case ast_for:
1693 printf("for( ");
1694 if (init_statement)
1695 init_statement->print();
1696 printf("; ");
1697
1698 if (condition)
1699 condition->print();
1700 printf("; ");
1701
1702 if (rest_expression)
1703 rest_expression->print();
1704 printf(") ");
1705
1706 body->print();
1707 break;
1708
1709 case ast_while:
1710 printf("while ( ");
1711 if (condition)
1712 condition->print();
1713 printf(") ");
1714 body->print();
1715 break;
1716
1717 case ast_do_while:
1718 printf("do ");
1719 body->print();
1720 printf("while ( ");
1721 if (condition)
1722 condition->print();
1723 printf("); ");
1724 break;
1725 }
1726 }
1727
1728
ast_iteration_statement(int mode,ast_node * init,ast_node * condition,ast_expression * rest_expression,ast_node * body)1729 ast_iteration_statement::ast_iteration_statement(int mode,
1730 ast_node *init,
1731 ast_node *condition,
1732 ast_expression *rest_expression,
1733 ast_node *body)
1734 {
1735 this->mode = ast_iteration_modes(mode);
1736 this->init_statement = init;
1737 this->condition = condition;
1738 this->rest_expression = rest_expression;
1739 this->body = body;
1740 }
1741
1742
1743 void
print(void) const1744 ast_struct_specifier::print(void) const
1745 {
1746 printf("struct %s { ", name);
1747 foreach_list_typed(ast_node, ast, link, &this->declarations) {
1748 ast->print();
1749 }
1750 printf("} ");
1751 }
1752
1753
ast_struct_specifier(const char * identifier,ast_declarator_list * declarator_list)1754 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1755 ast_declarator_list *declarator_list)
1756 : name(identifier), layout(NULL), declarations(), is_declaration(true),
1757 type(NULL)
1758 {
1759 this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1760 }
1761
print(void) const1762 void ast_subroutine_list::print(void) const
1763 {
1764 foreach_list_typed (ast_node, ast, link, & this->declarations) {
1765 if (&ast->link != this->declarations.get_head())
1766 printf(", ");
1767 ast->print();
1768 }
1769 }
1770
1771 static void
set_shader_inout_layout(struct gl_shader * shader,struct _mesa_glsl_parse_state * state)1772 set_shader_inout_layout(struct gl_shader *shader,
1773 struct _mesa_glsl_parse_state *state)
1774 {
1775 /* Should have been prevented by the parser. */
1776 if (shader->Stage != MESA_SHADER_GEOMETRY &&
1777 shader->Stage != MESA_SHADER_TESS_EVAL &&
1778 shader->Stage != MESA_SHADER_COMPUTE) {
1779 assert(!state->in_qualifier->flags.i);
1780 }
1781
1782 if (shader->Stage != MESA_SHADER_COMPUTE) {
1783 /* Should have been prevented by the parser. */
1784 assert(!state->cs_input_local_size_specified);
1785 assert(!state->cs_input_local_size_variable_specified);
1786 assert(state->cs_derivative_group == DERIVATIVE_GROUP_NONE);
1787 }
1788
1789 if (shader->Stage != MESA_SHADER_FRAGMENT) {
1790 /* Should have been prevented by the parser. */
1791 assert(!state->fs_uses_gl_fragcoord);
1792 assert(!state->fs_redeclares_gl_fragcoord);
1793 assert(!state->fs_pixel_center_integer);
1794 assert(!state->fs_origin_upper_left);
1795 assert(!state->fs_early_fragment_tests);
1796 assert(!state->fs_inner_coverage);
1797 assert(!state->fs_post_depth_coverage);
1798 assert(!state->fs_pixel_interlock_ordered);
1799 assert(!state->fs_pixel_interlock_unordered);
1800 assert(!state->fs_sample_interlock_ordered);
1801 assert(!state->fs_sample_interlock_unordered);
1802 }
1803
1804 for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1805 if (state->out_qualifier->out_xfb_stride[i]) {
1806 unsigned xfb_stride;
1807 if (state->out_qualifier->out_xfb_stride[i]->
1808 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1809 true)) {
1810 shader->TransformFeedbackBufferStride[i] = xfb_stride;
1811 }
1812 }
1813 }
1814
1815 switch (shader->Stage) {
1816 case MESA_SHADER_TESS_CTRL:
1817 shader->info.TessCtrl.VerticesOut = 0;
1818 if (state->tcs_output_vertices_specified) {
1819 unsigned vertices;
1820 if (state->out_qualifier->vertices->
1821 process_qualifier_constant(state, "vertices", &vertices,
1822 false)) {
1823
1824 YYLTYPE loc = state->out_qualifier->vertices->get_location();
1825 if (vertices > state->Const.MaxPatchVertices) {
1826 _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1827 "GL_MAX_PATCH_VERTICES", vertices);
1828 }
1829 shader->info.TessCtrl.VerticesOut = vertices;
1830 }
1831 }
1832 break;
1833 case MESA_SHADER_TESS_EVAL:
1834 shader->OES_tessellation_point_size_enable = state->OES_tessellation_point_size_enable || state->EXT_tessellation_point_size_enable;
1835 shader->info.TessEval._PrimitiveMode = TESS_PRIMITIVE_UNSPECIFIED;
1836 if (state->in_qualifier->flags.q.prim_type) {
1837 switch (state->in_qualifier->prim_type) {
1838 case GL_TRIANGLES:
1839 shader->info.TessEval._PrimitiveMode = TESS_PRIMITIVE_TRIANGLES;
1840 break;
1841 case GL_QUADS:
1842 shader->info.TessEval._PrimitiveMode = TESS_PRIMITIVE_QUADS;
1843 break;
1844 case GL_ISOLINES:
1845 shader->info.TessEval._PrimitiveMode = TESS_PRIMITIVE_ISOLINES;
1846 break;
1847 }
1848 }
1849
1850 shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1851 if (state->in_qualifier->flags.q.vertex_spacing)
1852 shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1853
1854 shader->info.TessEval.VertexOrder = 0;
1855 if (state->in_qualifier->flags.q.ordering)
1856 shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1857
1858 shader->info.TessEval.PointMode = -1;
1859 if (state->in_qualifier->flags.q.point_mode)
1860 shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1861 break;
1862 case MESA_SHADER_GEOMETRY:
1863 shader->OES_geometry_point_size_enable = state->OES_geometry_point_size_enable || state->EXT_geometry_point_size_enable;
1864 shader->info.Geom.VerticesOut = -1;
1865 if (state->out_qualifier->flags.q.max_vertices) {
1866 unsigned qual_max_vertices;
1867 if (state->out_qualifier->max_vertices->
1868 process_qualifier_constant(state, "max_vertices",
1869 &qual_max_vertices, true)) {
1870
1871 if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1872 YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1873 _mesa_glsl_error(&loc, state,
1874 "maximum output vertices (%d) exceeds "
1875 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1876 qual_max_vertices);
1877 }
1878 shader->info.Geom.VerticesOut = qual_max_vertices;
1879 }
1880 }
1881
1882 if (state->gs_input_prim_type_specified) {
1883 shader->info.Geom.InputType = (enum shader_prim)state->in_qualifier->prim_type;
1884 } else {
1885 shader->info.Geom.InputType = SHADER_PRIM_UNKNOWN;
1886 }
1887
1888 if (state->out_qualifier->flags.q.prim_type) {
1889 shader->info.Geom.OutputType = (enum shader_prim)state->out_qualifier->prim_type;
1890 } else {
1891 shader->info.Geom.OutputType = SHADER_PRIM_UNKNOWN;
1892 }
1893
1894 shader->info.Geom.Invocations = 0;
1895 if (state->in_qualifier->flags.q.invocations) {
1896 unsigned invocations;
1897 if (state->in_qualifier->invocations->
1898 process_qualifier_constant(state, "invocations",
1899 &invocations, false)) {
1900
1901 YYLTYPE loc = state->in_qualifier->invocations->get_location();
1902 if (invocations > state->Const.MaxGeometryShaderInvocations) {
1903 _mesa_glsl_error(&loc, state,
1904 "invocations (%d) exceeds "
1905 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1906 invocations);
1907 }
1908 shader->info.Geom.Invocations = invocations;
1909 }
1910 }
1911 break;
1912
1913 case MESA_SHADER_COMPUTE:
1914 if (state->cs_input_local_size_specified) {
1915 for (int i = 0; i < 3; i++)
1916 shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1917 } else {
1918 for (int i = 0; i < 3; i++)
1919 shader->info.Comp.LocalSize[i] = 0;
1920 }
1921
1922 shader->info.Comp.LocalSizeVariable =
1923 state->cs_input_local_size_variable_specified;
1924
1925 shader->info.Comp.DerivativeGroup = state->cs_derivative_group;
1926
1927 if (state->NV_compute_shader_derivatives_enable) {
1928 /* We allow multiple cs_input_layout nodes, but do not store them in
1929 * a convenient place, so for now live with an empty location error.
1930 */
1931 YYLTYPE loc = {0};
1932 if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_QUADS) {
1933 if (shader->info.Comp.LocalSize[0] % 2 != 0) {
1934 _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1935 "local group size whose first dimension "
1936 "is a multiple of 2\n");
1937 }
1938 if (shader->info.Comp.LocalSize[1] % 2 != 0) {
1939 _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1940 "local group size whose second dimension "
1941 "is a multiple of 2\n");
1942 }
1943 } else if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_LINEAR) {
1944 if ((shader->info.Comp.LocalSize[0] *
1945 shader->info.Comp.LocalSize[1] *
1946 shader->info.Comp.LocalSize[2]) % 4 != 0) {
1947 _mesa_glsl_error(&loc, state, "derivative_group_linearNV must be used with a "
1948 "local group size whose total number of invocations "
1949 "is a multiple of 4\n");
1950 }
1951 }
1952 }
1953
1954 break;
1955
1956 case MESA_SHADER_FRAGMENT:
1957 shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1958 shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1959 shader->pixel_center_integer = state->fs_pixel_center_integer;
1960 shader->origin_upper_left = state->fs_origin_upper_left;
1961 shader->ARB_fragment_coord_conventions_enable =
1962 state->ARB_fragment_coord_conventions_enable;
1963 shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1964 shader->InnerCoverage = state->fs_inner_coverage;
1965 shader->PostDepthCoverage = state->fs_post_depth_coverage;
1966 shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
1967 shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
1968 shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
1969 shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
1970 shader->BlendSupport = state->fs_blend_support;
1971 break;
1972
1973 default:
1974 /* Nothing to do. */
1975 break;
1976 }
1977
1978 shader->bindless_sampler = state->bindless_sampler_specified;
1979 shader->bindless_image = state->bindless_image_specified;
1980 shader->bound_sampler = state->bound_sampler_specified;
1981 shader->bound_image = state->bound_image_specified;
1982 shader->redeclares_gl_layer = state->redeclares_gl_layer;
1983 shader->layer_viewport_relative = state->layer_viewport_relative;
1984 }
1985
1986 /* src can be NULL if only the symbols found in the exec_list should be
1987 * copied
1988 */
1989 void
_mesa_glsl_copy_symbols_from_table(struct exec_list * shader_ir,struct glsl_symbol_table * src,struct glsl_symbol_table * dest)1990 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1991 struct glsl_symbol_table *src,
1992 struct glsl_symbol_table *dest)
1993 {
1994 foreach_in_list (ir_instruction, ir, shader_ir) {
1995 switch (ir->ir_type) {
1996 case ir_type_function:
1997 dest->add_function((ir_function *) ir);
1998 break;
1999 case ir_type_variable: {
2000 ir_variable *const var = (ir_variable *) ir;
2001
2002 if (var->data.mode != ir_var_temporary)
2003 dest->add_variable(var);
2004 break;
2005 }
2006 default:
2007 break;
2008 }
2009 }
2010
2011 if (src != NULL) {
2012 /* Explicitly copy the gl_PerVertex interface definitions because these
2013 * are needed to check they are the same during the interstage link.
2014 * They can’t necessarily be found via the exec_list because the members
2015 * might not be referenced. The GL spec still requires that they match
2016 * in that case.
2017 */
2018 const glsl_type *iface =
2019 src->get_interface("gl_PerVertex", ir_var_shader_in);
2020 if (iface)
2021 dest->add_interface(iface->name, iface, ir_var_shader_in);
2022
2023 iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
2024 if (iface)
2025 dest->add_interface(iface->name, iface, ir_var_shader_out);
2026 }
2027 }
2028
2029 extern "C" {
2030
2031 static void
assign_subroutine_indexes(struct _mesa_glsl_parse_state * state)2032 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
2033 {
2034 int j, k;
2035 int index = 0;
2036
2037 for (j = 0; j < state->num_subroutines; j++) {
2038 while (state->subroutines[j]->subroutine_index == -1) {
2039 for (k = 0; k < state->num_subroutines; k++) {
2040 if (state->subroutines[k]->subroutine_index == index)
2041 break;
2042 else if (k == state->num_subroutines - 1) {
2043 state->subroutines[j]->subroutine_index = index;
2044 }
2045 }
2046 index++;
2047 }
2048 }
2049 }
2050
2051 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)2052 add_builtin_defines(struct _mesa_glsl_parse_state *state,
2053 void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
2054 struct glcpp_parser *data,
2055 unsigned version,
2056 bool es)
2057 {
2058 unsigned gl_version = state->exts->Version;
2059 gl_api api = state->api;
2060
2061 if (gl_version != 0xff) {
2062 unsigned i;
2063 for (i = 0; i < state->num_supported_versions; i++) {
2064 if (state->supported_versions[i].ver == version &&
2065 state->supported_versions[i].es == es) {
2066 gl_version = state->supported_versions[i].gl_ver;
2067 break;
2068 }
2069 }
2070
2071 if (i == state->num_supported_versions)
2072 return;
2073 }
2074
2075 if (es)
2076 api = API_OPENGLES2;
2077
2078 for (unsigned i = 0;
2079 i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
2080 const _mesa_glsl_extension *extension
2081 = &_mesa_glsl_supported_extensions[i];
2082 if (extension->compatible_with_state(state, api, gl_version)) {
2083 add_builtin_define(data, extension->name, 1);
2084 }
2085 }
2086 }
2087
2088 /* Implements parsing checks that we can't do during parsing */
2089 static void
do_late_parsing_checks(struct _mesa_glsl_parse_state * state)2090 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
2091 {
2092 if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
2093 YYLTYPE loc;
2094 memset(&loc, 0, sizeof(loc));
2095 _mesa_glsl_error(&loc, state, "Compute shaders require "
2096 "GLSL 4.30 or GLSL ES 3.10");
2097 }
2098 }
2099
2100 static void
opt_shader_and_create_symbol_table(const struct gl_constants * consts,struct glsl_symbol_table * source_symbols,struct gl_shader * shader)2101 opt_shader_and_create_symbol_table(const struct gl_constants *consts,
2102 struct glsl_symbol_table *source_symbols,
2103 struct gl_shader *shader)
2104 {
2105 assert(shader->CompileStatus != COMPILE_FAILURE &&
2106 !shader->ir->is_empty());
2107
2108 const struct gl_shader_compiler_options *options =
2109 &consts->ShaderCompilerOptions[shader->Stage];
2110
2111 /* Do some optimization at compile time to reduce shader IR size
2112 * and reduce later work if the same shader is linked multiple times.
2113 *
2114 * Run it just once, since NIR will do the real optimization.
2115 */
2116 do_common_optimization(shader->ir, false, options, consts->NativeIntegers);
2117
2118 validate_ir_tree(shader->ir);
2119
2120 enum ir_variable_mode other;
2121 switch (shader->Stage) {
2122 case MESA_SHADER_VERTEX:
2123 other = ir_var_shader_in;
2124 break;
2125 case MESA_SHADER_FRAGMENT:
2126 other = ir_var_shader_out;
2127 break;
2128 default:
2129 /* Something invalid to ensure optimize_dead_builtin_uniforms
2130 * doesn't remove anything other than uniforms or constants.
2131 */
2132 other = ir_var_mode_count;
2133 break;
2134 }
2135
2136 optimize_dead_builtin_variables(shader->ir, other);
2137
2138 validate_ir_tree(shader->ir);
2139
2140 /* Retain any live IR, but trash the rest. */
2141 reparent_ir(shader->ir, shader->ir);
2142
2143 /* Destroy the symbol table. Create a new symbol table that contains only
2144 * the variables and functions that still exist in the IR. The symbol
2145 * table will be used later during linking.
2146 *
2147 * There must NOT be any freed objects still referenced by the symbol
2148 * table. That could cause the linker to dereference freed memory.
2149 *
2150 * We don't have to worry about types or interface-types here because those
2151 * are fly-weights that are looked up by glsl_type.
2152 */
2153 _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2154 shader->symbols);
2155 }
2156
2157 static bool
can_skip_compile(struct gl_context * ctx,struct gl_shader * shader,const char * source,const uint8_t source_sha1[SHA1_DIGEST_LENGTH],bool force_recompile,bool source_has_shader_include)2158 can_skip_compile(struct gl_context *ctx, struct gl_shader *shader,
2159 const char *source,
2160 const uint8_t source_sha1[SHA1_DIGEST_LENGTH],
2161 bool force_recompile, bool source_has_shader_include)
2162 {
2163 if (!force_recompile) {
2164 if (ctx->Cache) {
2165 char buf[41];
2166 disk_cache_compute_key(ctx->Cache, source, strlen(source),
2167 shader->disk_cache_sha1);
2168 if (disk_cache_has_key(ctx->Cache, shader->disk_cache_sha1)) {
2169 /* We've seen this shader before and know it compiles */
2170 if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2171 _mesa_sha1_format(buf, shader->disk_cache_sha1);
2172 fprintf(stderr, "deferring compile of shader: %s\n", buf);
2173 }
2174 shader->CompileStatus = COMPILE_SKIPPED;
2175
2176 free((void *)shader->FallbackSource);
2177
2178 /* Copy pre-processed shader include to fallback source otherwise
2179 * we have no guarantee the shader include source tree has not
2180 * changed.
2181 */
2182 if (source_has_shader_include) {
2183 shader->FallbackSource = strdup(source);
2184 memcpy(shader->fallback_source_sha1, source_sha1,
2185 SHA1_DIGEST_LENGTH);
2186 } else {
2187 shader->FallbackSource = NULL;
2188 }
2189 memcpy(shader->compiled_source_sha1, source_sha1,
2190 SHA1_DIGEST_LENGTH);
2191 return true;
2192 }
2193 }
2194 } else {
2195 /* We should only ever end up here if a re-compile has been forced by a
2196 * shader cache miss. In which case we can skip the compile if its
2197 * already been done by a previous fallback or the initial compile call.
2198 */
2199 if (shader->CompileStatus == COMPILE_SUCCESS)
2200 return true;
2201 }
2202
2203 return false;
2204 }
2205
2206 void
_mesa_glsl_compile_shader(struct gl_context * ctx,struct gl_shader * shader,bool dump_ast,bool dump_hir,bool force_recompile)2207 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2208 bool dump_ast, bool dump_hir, bool force_recompile)
2209 {
2210 const char *source;
2211 const uint8_t *source_sha1;
2212
2213 if (force_recompile && shader->FallbackSource) {
2214 source = shader->FallbackSource;
2215 source_sha1 = shader->fallback_source_sha1;
2216 } else {
2217 source = shader->Source;
2218 source_sha1 = shader->source_sha1;
2219 }
2220
2221 /* Note this will be true for shaders the have #include inside comments
2222 * however that should be rare enough not to worry about.
2223 */
2224 bool source_has_shader_include =
2225 strstr(source, "#include") == NULL ? false : true;
2226
2227 /* If there was no shader include we can check the shader cache and skip
2228 * compilation before we run the preprocessor. We never skip compiling
2229 * shaders that use ARB_shading_language_include because we would need to
2230 * keep duplicate copies of the shader include source tree and paths.
2231 */
2232 if (!source_has_shader_include &&
2233 can_skip_compile(ctx, shader, source, source_sha1, force_recompile,
2234 false))
2235 return;
2236
2237 struct _mesa_glsl_parse_state *state =
2238 new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2239
2240 if (ctx->Const.GenerateTemporaryNames)
2241 (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2242 false, true);
2243
2244 if (!source_has_shader_include || !force_recompile) {
2245 state->error = glcpp_preprocess(state, &source, &state->info_log,
2246 add_builtin_defines, state, ctx);
2247 }
2248
2249 /* Now that we have run the preprocessor we can check the shader cache and
2250 * skip compilation if possible for those shaders that contained a shader
2251 * include.
2252 */
2253 if (source_has_shader_include &&
2254 can_skip_compile(ctx, shader, source, source_sha1, force_recompile,
2255 true))
2256 return;
2257
2258 if (!state->error) {
2259 _mesa_glsl_lexer_ctor(state, source);
2260 _mesa_glsl_parse(state);
2261 _mesa_glsl_lexer_dtor(state);
2262 do_late_parsing_checks(state);
2263 }
2264
2265 if (dump_ast) {
2266 foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2267 ast->print();
2268 }
2269 printf("\n\n");
2270 }
2271
2272 ralloc_free(shader->ir);
2273 shader->ir = new(shader) exec_list;
2274 if (!state->error && !state->translation_unit.is_empty())
2275 _mesa_ast_to_hir(shader->ir, state);
2276
2277 if (!state->error) {
2278 validate_ir_tree(shader->ir);
2279
2280 /* Print out the unoptimized IR. */
2281 if (dump_hir) {
2282 _mesa_print_ir(stdout, shader->ir, state);
2283 }
2284 }
2285
2286 if (shader->InfoLog)
2287 ralloc_free(shader->InfoLog);
2288
2289 if (!state->error)
2290 set_shader_inout_layout(shader, state);
2291
2292 shader->symbols = new(shader->ir) glsl_symbol_table;
2293 shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2294 shader->InfoLog = state->info_log;
2295 shader->Version = state->language_version;
2296 shader->IsES = state->es_shader;
2297
2298 struct gl_shader_compiler_options *options =
2299 &ctx->Const.ShaderCompilerOptions[shader->Stage];
2300
2301 if (!state->error && !shader->ir->is_empty()) {
2302 if (state->es_shader &&
2303 (options->LowerPrecisionFloat16 || options->LowerPrecisionInt16))
2304 lower_precision(options, shader->ir);
2305 lower_builtins(shader->ir);
2306 assign_subroutine_indexes(state);
2307 lower_subroutine(shader->ir, state);
2308 opt_shader_and_create_symbol_table(&ctx->Const, state->symbols, shader);
2309 }
2310
2311 if (!force_recompile) {
2312 free((void *)shader->FallbackSource);
2313
2314 /* Copy pre-processed shader include to fallback source otherwise we
2315 * have no guarantee the shader include source tree has not changed.
2316 */
2317 if (source_has_shader_include) {
2318 shader->FallbackSource = strdup(source);
2319 memcpy(shader->fallback_source_sha1, source_sha1, SHA1_DIGEST_LENGTH);
2320 } else {
2321 shader->FallbackSource = NULL;
2322 }
2323 }
2324
2325 delete state->symbols;
2326 ralloc_free(state);
2327
2328 if (shader->CompileStatus == COMPILE_SUCCESS)
2329 memcpy(shader->compiled_source_sha1, source_sha1, SHA1_DIGEST_LENGTH);
2330
2331 if (ctx->Cache && shader->CompileStatus == COMPILE_SUCCESS) {
2332 char sha1_buf[41];
2333 disk_cache_put_key(ctx->Cache, shader->disk_cache_sha1);
2334 if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2335 _mesa_sha1_format(sha1_buf, shader->disk_cache_sha1);
2336 fprintf(stderr, "marking shader: %s\n", sha1_buf);
2337 }
2338 }
2339 }
2340
2341 } /* extern "C" */
2342 /**
2343 * Do the set of common optimizations passes
2344 *
2345 * \param ir List of instructions to be optimized
2346 * \param linked Is the shader linked? This enables
2347 * optimizations passes that remove code at
2348 * global scope and could cause linking to
2349 * fail.
2350 * \param uniform_locations_assigned Have locations already been assigned for
2351 * uniforms? This prevents the declarations
2352 * of unused uniforms from being removed.
2353 * The setting of this flag only matters if
2354 * \c linked is \c true.
2355 * \param options The driver's preferred shader options.
2356 * \param native_integers Selects optimizations that depend on the
2357 * implementations supporting integers
2358 * natively (as opposed to supporting
2359 * integers in floating point registers).
2360 */
2361 bool
do_common_optimization(exec_list * ir,bool linked,const struct gl_shader_compiler_options * options,bool native_integers)2362 do_common_optimization(exec_list *ir, bool linked,
2363 const struct gl_shader_compiler_options *options,
2364 bool native_integers)
2365 {
2366 const bool debug = false;
2367 bool progress = false;
2368
2369 #define OPT(PASS, ...) do { \
2370 if (debug) { \
2371 fprintf(stderr, "START GLSL optimization %s\n", #PASS); \
2372 const bool opt_progress = PASS(__VA_ARGS__); \
2373 progress = opt_progress || progress; \
2374 if (opt_progress) \
2375 _mesa_print_ir(stderr, ir, NULL); \
2376 fprintf(stderr, "GLSL optimization %s: %s progress\n", \
2377 #PASS, opt_progress ? "made" : "no"); \
2378 } else { \
2379 progress = PASS(__VA_ARGS__) || progress; \
2380 } \
2381 } while (false)
2382
2383 OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2384
2385 if (linked) {
2386 OPT(do_function_inlining, ir);
2387 OPT(do_dead_functions, ir);
2388 OPT(do_structure_splitting, ir);
2389 }
2390 OPT(propagate_invariance, ir);
2391 OPT(do_if_simplification, ir);
2392 OPT(opt_flatten_nested_if_blocks, ir);
2393 OPT(do_copy_propagation_elements, ir);
2394
2395 if (options->OptimizeForAOS && !linked)
2396 OPT(opt_flip_matrices, ir);
2397
2398 if (linked)
2399 OPT(do_dead_code, ir);
2400 else
2401 OPT(do_dead_code_unlinked, ir);
2402 OPT(do_dead_code_local, ir);
2403 OPT(do_tree_grafting, ir);
2404 OPT(do_constant_propagation, ir);
2405 if (linked)
2406 OPT(do_constant_variable, ir);
2407 else
2408 OPT(do_constant_variable_unlinked, ir);
2409 OPT(do_constant_folding, ir);
2410 OPT(do_minmax_prune, ir);
2411 OPT(do_rebalance_tree, ir);
2412 OPT(do_algebraic, ir, native_integers, options);
2413 OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2414 options->EmitNoCont);
2415 OPT(do_vec_index_to_swizzle, ir);
2416 OPT(lower_vector_insert, ir, false);
2417
2418 /* Some drivers only call do_common_optimization() once rather than in a
2419 * loop, and split arrays causes each element of a constant array to
2420 * dereference is own copy of the entire array initilizer. This IR is not
2421 * something that can be generated manually in a shader and is not
2422 * accounted for by NIR optimisations, the result is an exponential slow
2423 * down in compilation speed as a constant arrays element count grows. To
2424 * avoid that here we make sure to always clean up the mess split arrays
2425 * causes to constant arrays.
2426 */
2427 bool array_split = optimize_split_arrays(ir, linked);
2428 if (array_split)
2429 do_constant_propagation(ir);
2430 progress |= array_split;
2431
2432 /* If an optimization pass fails to preserve the invariant flag, calling
2433 * the pass only once earlier may result in incorrect code generation. Always call
2434 * propagate_invariance() last to avoid this possibility.
2435 */
2436 OPT(propagate_invariance, ir);
2437
2438 #undef OPT
2439
2440 return progress;
2441 }
2442