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
325 this->cs_input_local_size_variable_specified = false;
326
327 /* ARB_bindless_texture */
328 this->bindless_sampler_specified = false;
329 this->bindless_image_specified = false;
330 this->bound_sampler_specified = false;
331 this->bound_image_specified = false;
332 }
333
334 /**
335 * Determine whether the current GLSL version is sufficiently high to support
336 * a certain feature, and generate an error message if it isn't.
337 *
338 * \param required_glsl_version and \c required_glsl_es_version are
339 * interpreted as they are in _mesa_glsl_parse_state::is_version().
340 *
341 * \param locp is the parser location where the error should be reported.
342 *
343 * \param fmt (and additional arguments) constitute a printf-style error
344 * message to report if the version check fails. Information about the
345 * current and required GLSL versions will be appended. So, for example, if
346 * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
347 * "foo unsupported") is called, the error message will be "foo unsupported in
348 * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
349 */
350 bool
check_version(unsigned required_glsl_version,unsigned required_glsl_es_version,YYLTYPE * locp,const char * fmt,...)351 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
352 unsigned required_glsl_es_version,
353 YYLTYPE *locp, const char *fmt, ...)
354 {
355 if (this->is_version(required_glsl_version, required_glsl_es_version))
356 return true;
357
358 va_list args;
359 va_start(args, fmt);
360 char *problem = ralloc_vasprintf(this, fmt, args);
361 va_end(args);
362 const char *glsl_version_string
363 = glsl_compute_version_string(this, false, required_glsl_version);
364 const char *glsl_es_version_string
365 = glsl_compute_version_string(this, true, required_glsl_es_version);
366 const char *requirement_string = "";
367 if (required_glsl_version && required_glsl_es_version) {
368 requirement_string = ralloc_asprintf(this, " (%s or %s required)",
369 glsl_version_string,
370 glsl_es_version_string);
371 } else if (required_glsl_version) {
372 requirement_string = ralloc_asprintf(this, " (%s required)",
373 glsl_version_string);
374 } else if (required_glsl_es_version) {
375 requirement_string = ralloc_asprintf(this, " (%s required)",
376 glsl_es_version_string);
377 }
378 _mesa_glsl_error(locp, this, "%s in %s%s",
379 problem, this->get_version_string(),
380 requirement_string);
381
382 return false;
383 }
384
385 /**
386 * Process a GLSL #version directive.
387 *
388 * \param version is the integer that follows the #version token.
389 *
390 * \param ident is a string identifier that follows the integer, if any is
391 * present. Otherwise NULL.
392 */
393 void
process_version_directive(YYLTYPE * locp,int version,const char * ident)394 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
395 const char *ident)
396 {
397 bool es_token_present = false;
398 bool compat_token_present = false;
399 bool core_token_present = false;
400 if (ident) {
401 if (strcmp(ident, "es") == 0) {
402 es_token_present = true;
403 } else if (version >= 150) {
404 if (strcmp(ident, "core") == 0) {
405 core_token_present = true;
406 } else if (strcmp(ident, "compatibility") == 0) {
407 compat_token_present = true;
408
409 if (this->ctx->API != API_OPENGL_COMPAT) {
410 _mesa_glsl_error(locp, this,
411 "the compatibility profile is not supported");
412 }
413 } else {
414 _mesa_glsl_error(locp, this,
415 "\"%s\" is not a valid shading language profile; "
416 "if present, it must be \"core\"", ident);
417 }
418 } else {
419 _mesa_glsl_error(locp, this,
420 "illegal text following version number");
421 }
422 }
423
424 this->es_shader = es_token_present;
425 if (version == 100) {
426 if (es_token_present) {
427 _mesa_glsl_error(locp, this,
428 "GLSL 1.00 ES should be selected using "
429 "`#version 100'");
430 } else {
431 this->es_shader = true;
432 }
433 }
434
435 if (this->es_shader) {
436 this->ARB_texture_rectangle_enable = false;
437 }
438
439 if (this->forced_language_version)
440 this->language_version = this->forced_language_version;
441 else
442 this->language_version = version;
443
444 this->compat_shader = compat_token_present ||
445 (this->ctx->API == API_OPENGL_COMPAT &&
446 this->language_version >= 140 &&
447 !core_token_present) ||
448 (!this->es_shader && this->language_version < 140);
449
450 bool supported = false;
451 for (unsigned i = 0; i < this->num_supported_versions; i++) {
452 if (this->supported_versions[i].ver == this->language_version
453 && this->supported_versions[i].es == this->es_shader) {
454 this->gl_version = this->supported_versions[i].gl_ver;
455 supported = true;
456 break;
457 }
458 }
459
460 if (!supported) {
461 _mesa_glsl_error(locp, this, "%s is not supported. "
462 "Supported versions are: %s",
463 this->get_version_string(),
464 this->supported_version_string);
465
466 /* On exit, the language_version must be set to a valid value.
467 * Later calls to _mesa_glsl_initialize_types will misbehave if
468 * the version is invalid.
469 */
470 switch (this->ctx->API) {
471 case API_OPENGL_COMPAT:
472 case API_OPENGL_CORE:
473 this->language_version = this->ctx->Const.GLSLVersion;
474 break;
475
476 case API_OPENGLES:
477 assert(!"Should not get here.");
478 /* FALLTHROUGH */
479
480 case API_OPENGLES2:
481 this->language_version = 100;
482 break;
483 }
484 }
485 }
486
487
488 /* This helper function will append the given message to the shader's
489 info log and report it via GL_ARB_debug_output. Per that extension,
490 'type' is one of the enum values classifying the message, and
491 'id' is the implementation-defined ID of the given message. */
492 static void
_mesa_glsl_msg(const YYLTYPE * locp,_mesa_glsl_parse_state * state,GLenum type,const char * fmt,va_list ap)493 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
494 GLenum type, const char *fmt, va_list ap)
495 {
496 bool error = (type == MESA_DEBUG_TYPE_ERROR);
497 GLuint msg_id = 0;
498
499 assert(state->info_log != NULL);
500
501 /* Get the offset that the new message will be written to. */
502 int msg_offset = strlen(state->info_log);
503
504 if (locp->path) {
505 ralloc_asprintf_append(&state->info_log, "\"%s\"", locp->path);
506 } else {
507 ralloc_asprintf_append(&state->info_log, "%u", locp->source);
508 }
509 ralloc_asprintf_append(&state->info_log, ":%u(%u): %s: ",
510 locp->first_line, locp->first_column,
511 error ? "error" : "warning");
512
513 ralloc_vasprintf_append(&state->info_log, fmt, ap);
514
515 const char *const msg = &state->info_log[msg_offset];
516 struct gl_context *ctx = state->ctx;
517
518 /* Report the error via GL_ARB_debug_output. */
519 _mesa_shader_debug(ctx, type, &msg_id, msg);
520
521 ralloc_strcat(&state->info_log, "\n");
522 }
523
524 void
_mesa_glsl_error(YYLTYPE * locp,_mesa_glsl_parse_state * state,const char * fmt,...)525 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
526 const char *fmt, ...)
527 {
528 va_list ap;
529
530 state->error = true;
531
532 va_start(ap, fmt);
533 _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
534 va_end(ap);
535 }
536
537
538 void
_mesa_glsl_warning(const YYLTYPE * locp,_mesa_glsl_parse_state * state,const char * fmt,...)539 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
540 const char *fmt, ...)
541 {
542 if (state->warnings_enabled) {
543 va_list ap;
544
545 va_start(ap, fmt);
546 _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
547 va_end(ap);
548 }
549 }
550
551
552 /**
553 * Enum representing the possible behaviors that can be specified in
554 * an #extension directive.
555 */
556 enum ext_behavior {
557 extension_disable,
558 extension_enable,
559 extension_require,
560 extension_warn
561 };
562
563 /**
564 * Element type for _mesa_glsl_supported_extensions
565 */
566 struct _mesa_glsl_extension {
567 /**
568 * Name of the extension when referred to in a GLSL extension
569 * statement
570 */
571 const char *name;
572
573 /**
574 * Whether this extension is a part of AEP
575 */
576 bool aep;
577
578 /**
579 * Predicate that checks whether the relevant extension is available for
580 * this context.
581 */
582 bool (*available_pred)(const struct gl_context *,
583 gl_api api, uint8_t version);
584
585 /**
586 * Flag in the _mesa_glsl_parse_state struct that should be set
587 * when this extension is enabled.
588 *
589 * See note in _mesa_glsl_extension::supported_flag about "pointer
590 * to member" types.
591 */
592 bool _mesa_glsl_parse_state::* enable_flag;
593
594 /**
595 * Flag in the _mesa_glsl_parse_state struct that should be set
596 * when the shader requests "warn" behavior for this extension.
597 *
598 * See note in _mesa_glsl_extension::supported_flag about "pointer
599 * to member" types.
600 */
601 bool _mesa_glsl_parse_state::* warn_flag;
602
603
604 bool compatible_with_state(const _mesa_glsl_parse_state *state,
605 gl_api api, uint8_t gl_version) const;
606 void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
607 };
608
609 /** Checks if the context supports a user-facing extension */
610 #define EXT(name_str, driver_cap, ...) \
611 static UNUSED bool \
612 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
613 { \
614 return ctx->Extensions.driver_cap && (version >= \
615 _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
616 }
617 #include "main/extensions_table.h"
618 #undef EXT
619
620 #define EXT(NAME) \
621 { "GL_" #NAME, false, has_##NAME, \
622 &_mesa_glsl_parse_state::NAME##_enable, \
623 &_mesa_glsl_parse_state::NAME##_warn }
624
625 #define EXT_AEP(NAME) \
626 { "GL_" #NAME, true, has_##NAME, \
627 &_mesa_glsl_parse_state::NAME##_enable, \
628 &_mesa_glsl_parse_state::NAME##_warn }
629
630 /**
631 * Table of extensions that can be enabled/disabled within a shader,
632 * and the conditions under which they are supported.
633 */
634 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
635 /* ARB extensions go here, sorted alphabetically.
636 */
637 EXT(ARB_ES3_1_compatibility),
638 EXT(ARB_ES3_2_compatibility),
639 EXT(ARB_arrays_of_arrays),
640 EXT(ARB_bindless_texture),
641 EXT(ARB_compatibility),
642 EXT(ARB_compute_shader),
643 EXT(ARB_compute_variable_group_size),
644 EXT(ARB_conservative_depth),
645 EXT(ARB_cull_distance),
646 EXT(ARB_derivative_control),
647 EXT(ARB_draw_buffers),
648 EXT(ARB_draw_instanced),
649 EXT(ARB_enhanced_layouts),
650 EXT(ARB_explicit_attrib_location),
651 EXT(ARB_explicit_uniform_location),
652 EXT(ARB_fragment_coord_conventions),
653 EXT(ARB_fragment_layer_viewport),
654 EXT(ARB_fragment_shader_interlock),
655 EXT(ARB_gpu_shader5),
656 EXT(ARB_gpu_shader_fp64),
657 EXT(ARB_gpu_shader_int64),
658 EXT(ARB_post_depth_coverage),
659 EXT(ARB_sample_shading),
660 EXT(ARB_separate_shader_objects),
661 EXT(ARB_shader_atomic_counter_ops),
662 EXT(ARB_shader_atomic_counters),
663 EXT(ARB_shader_ballot),
664 EXT(ARB_shader_bit_encoding),
665 EXT(ARB_shader_clock),
666 EXT(ARB_shader_draw_parameters),
667 EXT(ARB_shader_group_vote),
668 EXT(ARB_shader_image_load_store),
669 EXT(ARB_shader_image_size),
670 EXT(ARB_shader_precision),
671 EXT(ARB_shader_stencil_export),
672 EXT(ARB_shader_storage_buffer_object),
673 EXT(ARB_shader_subroutine),
674 EXT(ARB_shader_texture_image_samples),
675 EXT(ARB_shader_texture_lod),
676 EXT(ARB_shader_viewport_layer_array),
677 EXT(ARB_shading_language_420pack),
678 EXT(ARB_shading_language_include),
679 EXT(ARB_shading_language_packing),
680 EXT(ARB_tessellation_shader),
681 EXT(ARB_texture_cube_map_array),
682 EXT(ARB_texture_gather),
683 EXT(ARB_texture_multisample),
684 EXT(ARB_texture_query_levels),
685 EXT(ARB_texture_query_lod),
686 EXT(ARB_texture_rectangle),
687 EXT(ARB_uniform_buffer_object),
688 EXT(ARB_vertex_attrib_64bit),
689 EXT(ARB_viewport_array),
690
691 /* KHR extensions go here, sorted alphabetically.
692 */
693 EXT_AEP(KHR_blend_equation_advanced),
694
695 /* OES extensions go here, sorted alphabetically.
696 */
697 EXT(OES_EGL_image_external),
698 EXT(OES_EGL_image_external_essl3),
699 EXT(OES_geometry_point_size),
700 EXT(OES_geometry_shader),
701 EXT(OES_gpu_shader5),
702 EXT(OES_primitive_bounding_box),
703 EXT_AEP(OES_sample_variables),
704 EXT_AEP(OES_shader_image_atomic),
705 EXT(OES_shader_io_blocks),
706 EXT_AEP(OES_shader_multisample_interpolation),
707 EXT(OES_standard_derivatives),
708 EXT(OES_tessellation_point_size),
709 EXT(OES_tessellation_shader),
710 EXT(OES_texture_3D),
711 EXT(OES_texture_buffer),
712 EXT(OES_texture_cube_map_array),
713 EXT_AEP(OES_texture_storage_multisample_2d_array),
714 EXT(OES_viewport_array),
715
716 /* All other extensions go here, sorted alphabetically.
717 */
718 EXT(AMD_conservative_depth),
719 EXT(AMD_gpu_shader_int64),
720 EXT(AMD_shader_stencil_export),
721 EXT(AMD_shader_trinary_minmax),
722 EXT(AMD_texture_texture4),
723 EXT(AMD_vertex_shader_layer),
724 EXT(AMD_vertex_shader_viewport_index),
725 EXT(ANDROID_extension_pack_es31a),
726 EXT(EXT_blend_func_extended),
727 EXT(EXT_demote_to_helper_invocation),
728 EXT(EXT_frag_depth),
729 EXT(EXT_draw_buffers),
730 EXT(EXT_draw_instanced),
731 EXT(EXT_clip_cull_distance),
732 EXT(EXT_geometry_point_size),
733 EXT_AEP(EXT_geometry_shader),
734 EXT(EXT_gpu_shader4),
735 EXT_AEP(EXT_gpu_shader5),
736 EXT_AEP(EXT_primitive_bounding_box),
737 EXT(EXT_separate_shader_objects),
738 EXT(EXT_shader_framebuffer_fetch),
739 EXT(EXT_shader_framebuffer_fetch_non_coherent),
740 EXT(EXT_shader_group_vote),
741 EXT(EXT_shader_image_load_formatted),
742 EXT(EXT_shader_image_load_store),
743 EXT(EXT_shader_implicit_conversions),
744 EXT(EXT_shader_integer_mix),
745 EXT_AEP(EXT_shader_io_blocks),
746 EXT(EXT_shader_samples_identical),
747 EXT(EXT_tessellation_point_size),
748 EXT_AEP(EXT_tessellation_shader),
749 EXT(EXT_texture_array),
750 EXT_AEP(EXT_texture_buffer),
751 EXT_AEP(EXT_texture_cube_map_array),
752 EXT(EXT_texture_query_lod),
753 EXT(EXT_texture_shadow_lod),
754 EXT(INTEL_conservative_rasterization),
755 EXT(INTEL_shader_atomic_float_minmax),
756 EXT(INTEL_shader_integer_functions2),
757 EXT(MESA_shader_integer_functions),
758 EXT(NV_compute_shader_derivatives),
759 EXT(NV_fragment_shader_interlock),
760 EXT(NV_image_formats),
761 EXT(NV_shader_atomic_float),
762 EXT(NV_shader_atomic_int64),
763 EXT(NV_viewport_array2),
764 };
765
766 #undef EXT
767
768
769 /**
770 * Determine whether a given extension is compatible with the target,
771 * API, and extension information in the current parser state.
772 */
compatible_with_state(const _mesa_glsl_parse_state * state,gl_api api,uint8_t gl_version) const773 bool _mesa_glsl_extension::compatible_with_state(
774 const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
775 {
776 return this->available_pred(state->ctx, api, gl_version);
777 }
778
779 /**
780 * Set the appropriate flags in the parser state to establish the
781 * given behavior for this extension.
782 */
set_flags(_mesa_glsl_parse_state * state,ext_behavior behavior) const783 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
784 ext_behavior behavior) const
785 {
786 /* Note: the ->* operator indexes into state by the
787 * offsets this->enable_flag and this->warn_flag. See
788 * _mesa_glsl_extension::supported_flag for more info.
789 */
790 state->*(this->enable_flag) = (behavior != extension_disable);
791 state->*(this->warn_flag) = (behavior == extension_warn);
792 }
793
794 /**
795 * Find an extension by name in _mesa_glsl_supported_extensions. If
796 * the name is not found, return NULL.
797 */
find_extension(const char * name)798 static const _mesa_glsl_extension *find_extension(const char *name)
799 {
800 for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
801 if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
802 return &_mesa_glsl_supported_extensions[i];
803 }
804 }
805 return NULL;
806 }
807
808 bool
_mesa_glsl_process_extension(const char * name,YYLTYPE * name_locp,const char * behavior_string,YYLTYPE * behavior_locp,_mesa_glsl_parse_state * state)809 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
810 const char *behavior_string, YYLTYPE *behavior_locp,
811 _mesa_glsl_parse_state *state)
812 {
813 uint8_t gl_version = state->ctx->Extensions.Version;
814 gl_api api = state->ctx->API;
815 ext_behavior behavior;
816 if (strcmp(behavior_string, "warn") == 0) {
817 behavior = extension_warn;
818 } else if (strcmp(behavior_string, "require") == 0) {
819 behavior = extension_require;
820 } else if (strcmp(behavior_string, "enable") == 0) {
821 behavior = extension_enable;
822 } else if (strcmp(behavior_string, "disable") == 0) {
823 behavior = extension_disable;
824 } else {
825 _mesa_glsl_error(behavior_locp, state,
826 "unknown extension behavior `%s'",
827 behavior_string);
828 return false;
829 }
830
831 /* If we're in a desktop context but with an ES shader, use an ES API enum
832 * to verify extension availability.
833 */
834 if (state->es_shader && api != API_OPENGLES2)
835 api = API_OPENGLES2;
836 /* Use the language-version derived GL version to extension checks, unless
837 * we're using meta, which sets the version to the max.
838 */
839 if (gl_version != 0xff)
840 gl_version = state->gl_version;
841
842 if (strcmp(name, "all") == 0) {
843 if ((behavior == extension_enable) || (behavior == extension_require)) {
844 _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
845 (behavior == extension_enable)
846 ? "enable" : "require");
847 return false;
848 } else {
849 for (unsigned i = 0;
850 i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
851 const _mesa_glsl_extension *extension
852 = &_mesa_glsl_supported_extensions[i];
853 if (extension->compatible_with_state(state, api, gl_version)) {
854 _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
855 }
856 }
857 }
858 } else {
859 const _mesa_glsl_extension *extension = find_extension(name);
860 if (extension && extension->compatible_with_state(state, api, gl_version)) {
861 extension->set_flags(state, behavior);
862 if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
863 for (unsigned i = 0;
864 i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
865 const _mesa_glsl_extension *extension =
866 &_mesa_glsl_supported_extensions[i];
867
868 if (!extension->aep)
869 continue;
870 /* AEP should not be enabled if all of the sub-extensions can't
871 * also be enabled. This is not the proper layer to do such
872 * error-checking though.
873 */
874 assert(extension->compatible_with_state(state, api, gl_version));
875 extension->set_flags(state, behavior);
876 }
877 }
878 } else {
879 static const char fmt[] = "extension `%s' unsupported in %s shader";
880
881 if (behavior == extension_require) {
882 _mesa_glsl_error(name_locp, state, fmt,
883 name, _mesa_shader_stage_to_string(state->stage));
884 return false;
885 } else {
886 _mesa_glsl_warning(name_locp, state, fmt,
887 name, _mesa_shader_stage_to_string(state->stage));
888 }
889 }
890 }
891
892 return true;
893 }
894
895
896 /**
897 * Recurses through <type> and <expr> if <expr> is an aggregate initializer
898 * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
899 * (process_array_constructor, et al) sufficient information to do type
900 * checking.
901 *
902 * Operates on assignments involving an aggregate initializer. E.g.,
903 *
904 * vec4 pos = {1.0, -1.0, 0.0, 1.0};
905 *
906 * or more ridiculously,
907 *
908 * struct S {
909 * vec4 v[2];
910 * };
911 *
912 * struct {
913 * S a[2], b;
914 * int c;
915 * } aggregate = {
916 * {
917 * {
918 * {
919 * {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
920 * {5.0, 6.0, 7.0, 8.0} // a[0].v[1]
921 * } // a[0].v
922 * }, // a[0]
923 * {
924 * {
925 * {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
926 * {5.0, 6.0, 7.0, 8.0} // a[1].v[1]
927 * } // a[1].v
928 * } // a[1]
929 * }, // a
930 * {
931 * {
932 * {1.0, 2.0, 3.0, 4.0}, // b.v[0]
933 * {5.0, 6.0, 7.0, 8.0} // b.v[1]
934 * } // b.v
935 * }, // b
936 * 4 // c
937 * };
938 *
939 * This pass is necessary because the right-hand side of <type> e = { ... }
940 * doesn't contain sufficient information to determine if the types match.
941 */
942 void
_mesa_ast_set_aggregate_type(const glsl_type * type,ast_expression * expr)943 _mesa_ast_set_aggregate_type(const glsl_type *type,
944 ast_expression *expr)
945 {
946 ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
947 ai->constructor_type = type;
948
949 /* If the aggregate is an array, recursively set its elements' types. */
950 if (type->is_array()) {
951 /* Each array element has the type type->fields.array.
952 *
953 * E.g., if <type> if struct S[2] we want to set each element's type to
954 * struct S.
955 */
956 for (exec_node *expr_node = ai->expressions.get_head_raw();
957 !expr_node->is_tail_sentinel();
958 expr_node = expr_node->next) {
959 ast_expression *expr = exec_node_data(ast_expression, expr_node,
960 link);
961
962 if (expr->oper == ast_aggregate)
963 _mesa_ast_set_aggregate_type(type->fields.array, expr);
964 }
965
966 /* If the aggregate is a struct, recursively set its fields' types. */
967 } else if (type->is_struct()) {
968 exec_node *expr_node = ai->expressions.get_head_raw();
969
970 /* Iterate through the struct's fields. */
971 for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
972 i++, expr_node = expr_node->next) {
973 ast_expression *expr = exec_node_data(ast_expression, expr_node,
974 link);
975
976 if (expr->oper == ast_aggregate) {
977 _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
978 }
979 }
980 /* If the aggregate is a matrix, set its columns' types. */
981 } else if (type->is_matrix()) {
982 for (exec_node *expr_node = ai->expressions.get_head_raw();
983 !expr_node->is_tail_sentinel();
984 expr_node = expr_node->next) {
985 ast_expression *expr = exec_node_data(ast_expression, expr_node,
986 link);
987
988 if (expr->oper == ast_aggregate)
989 _mesa_ast_set_aggregate_type(type->column_type(), expr);
990 }
991 }
992 }
993
994 void
_mesa_ast_process_interface_block(YYLTYPE * locp,_mesa_glsl_parse_state * state,ast_interface_block * const block,const struct ast_type_qualifier & q)995 _mesa_ast_process_interface_block(YYLTYPE *locp,
996 _mesa_glsl_parse_state *state,
997 ast_interface_block *const block,
998 const struct ast_type_qualifier &q)
999 {
1000 if (q.flags.q.buffer) {
1001 if (!state->has_shader_storage_buffer_objects()) {
1002 _mesa_glsl_error(locp, state,
1003 "#version 430 / GL_ARB_shader_storage_buffer_object "
1004 "required for defining shader storage blocks");
1005 } else if (state->ARB_shader_storage_buffer_object_warn) {
1006 _mesa_glsl_warning(locp, state,
1007 "#version 430 / GL_ARB_shader_storage_buffer_object "
1008 "required for defining shader storage blocks");
1009 }
1010 } else if (q.flags.q.uniform) {
1011 if (!state->has_uniform_buffer_objects()) {
1012 _mesa_glsl_error(locp, state,
1013 "#version 140 / GL_ARB_uniform_buffer_object "
1014 "required for defining uniform blocks");
1015 } else if (state->ARB_uniform_buffer_object_warn) {
1016 _mesa_glsl_warning(locp, state,
1017 "#version 140 / GL_ARB_uniform_buffer_object "
1018 "required for defining uniform blocks");
1019 }
1020 } else {
1021 if (!state->has_shader_io_blocks()) {
1022 if (state->es_shader) {
1023 _mesa_glsl_error(locp, state,
1024 "GL_OES_shader_io_blocks or #version 320 "
1025 "required for using interface blocks");
1026 } else {
1027 _mesa_glsl_error(locp, state,
1028 "#version 150 required for using "
1029 "interface blocks");
1030 }
1031 }
1032 }
1033
1034 /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
1035 * "It is illegal to have an input block in a vertex shader
1036 * or an output block in a fragment shader"
1037 */
1038 if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
1039 _mesa_glsl_error(locp, state,
1040 "`in' interface block is not allowed for "
1041 "a vertex shader");
1042 } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1043 _mesa_glsl_error(locp, state,
1044 "`out' interface block is not allowed for "
1045 "a fragment shader");
1046 }
1047
1048 /* Since block arrays require names, and both features are added in
1049 * the same language versions, we don't have to explicitly
1050 * version-check both things.
1051 */
1052 if (block->instance_name != NULL) {
1053 state->check_version(150, 300, locp, "interface blocks with "
1054 "an instance name are not allowed");
1055 }
1056
1057 ast_type_qualifier::bitset_t interface_type_mask;
1058 struct ast_type_qualifier temp_type_qualifier;
1059
1060 /* Get a bitmask containing only the in/out/uniform/buffer
1061 * flags, allowing us to ignore other irrelevant flags like
1062 * interpolation qualifiers.
1063 */
1064 temp_type_qualifier.flags.i = 0;
1065 temp_type_qualifier.flags.q.uniform = true;
1066 temp_type_qualifier.flags.q.in = true;
1067 temp_type_qualifier.flags.q.out = true;
1068 temp_type_qualifier.flags.q.buffer = true;
1069 temp_type_qualifier.flags.q.patch = true;
1070 interface_type_mask = temp_type_qualifier.flags.i;
1071
1072 /* Get the block's interface qualifier. The interface_qualifier
1073 * production rule guarantees that only one bit will be set (and
1074 * it will be in/out/uniform).
1075 */
1076 ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1077
1078 block->default_layout.flags.i |= block_interface_qualifier;
1079
1080 if (state->stage == MESA_SHADER_GEOMETRY &&
1081 state->has_explicit_attrib_stream() &&
1082 block->default_layout.flags.q.out) {
1083 /* Assign global layout's stream value. */
1084 block->default_layout.flags.q.stream = 1;
1085 block->default_layout.flags.q.explicit_stream = 0;
1086 block->default_layout.stream = state->out_qualifier->stream;
1087 }
1088
1089 if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1090 /* Assign global layout's xfb_buffer value. */
1091 block->default_layout.flags.q.xfb_buffer = 1;
1092 block->default_layout.flags.q.explicit_xfb_buffer = 0;
1093 block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1094 }
1095
1096 foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1097 ast_type_qualifier& qualifier = member->type->qualifier;
1098 if ((qualifier.flags.i & interface_type_mask) == 0) {
1099 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1100 * "If no optional qualifier is used in a member declaration, the
1101 * qualifier of the variable is just in, out, or uniform as declared
1102 * by interface-qualifier."
1103 */
1104 qualifier.flags.i |= block_interface_qualifier;
1105 } else if ((qualifier.flags.i & interface_type_mask) !=
1106 block_interface_qualifier) {
1107 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1108 * "If optional qualifiers are used, they can include interpolation
1109 * and storage qualifiers and they must declare an input, output,
1110 * or uniform variable consistent with the interface qualifier of
1111 * the block."
1112 */
1113 _mesa_glsl_error(locp, state,
1114 "uniform/in/out qualifier on "
1115 "interface block member does not match "
1116 "the interface block");
1117 }
1118
1119 if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1120 _mesa_glsl_error(locp, state,
1121 "invariant qualifiers can be used only "
1122 "in interface block members for shader "
1123 "inputs or outputs");
1124 }
1125 }
1126
1127 static void
_mesa_ast_type_qualifier_print(const struct ast_type_qualifier * q)1128 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1129 {
1130 if (q->is_subroutine_decl())
1131 printf("subroutine ");
1132
1133 if (q->subroutine_list) {
1134 printf("subroutine (");
1135 q->subroutine_list->print();
1136 printf(")");
1137 }
1138
1139 if (q->flags.q.constant)
1140 printf("const ");
1141
1142 if (q->flags.q.invariant)
1143 printf("invariant ");
1144
1145 if (q->flags.q.attribute)
1146 printf("attribute ");
1147
1148 if (q->flags.q.varying)
1149 printf("varying ");
1150
1151 if (q->flags.q.in && q->flags.q.out)
1152 printf("inout ");
1153 else {
1154 if (q->flags.q.in)
1155 printf("in ");
1156
1157 if (q->flags.q.out)
1158 printf("out ");
1159 }
1160
1161 if (q->flags.q.centroid)
1162 printf("centroid ");
1163 if (q->flags.q.sample)
1164 printf("sample ");
1165 if (q->flags.q.patch)
1166 printf("patch ");
1167 if (q->flags.q.uniform)
1168 printf("uniform ");
1169 if (q->flags.q.buffer)
1170 printf("buffer ");
1171 if (q->flags.q.smooth)
1172 printf("smooth ");
1173 if (q->flags.q.flat)
1174 printf("flat ");
1175 if (q->flags.q.noperspective)
1176 printf("noperspective ");
1177 }
1178
1179
1180 void
print(void) const1181 ast_node::print(void) const
1182 {
1183 printf("unhandled node ");
1184 }
1185
1186
ast_node(void)1187 ast_node::ast_node(void)
1188 {
1189 this->location.path = NULL;
1190 this->location.source = 0;
1191 this->location.first_line = 0;
1192 this->location.first_column = 0;
1193 this->location.last_line = 0;
1194 this->location.last_column = 0;
1195 }
1196
1197
1198 static void
ast_opt_array_dimensions_print(const ast_array_specifier * array_specifier)1199 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1200 {
1201 if (array_specifier)
1202 array_specifier->print();
1203 }
1204
1205
1206 void
print(void) const1207 ast_compound_statement::print(void) const
1208 {
1209 printf("{\n");
1210
1211 foreach_list_typed(ast_node, ast, link, &this->statements) {
1212 ast->print();
1213 }
1214
1215 printf("}\n");
1216 }
1217
1218
ast_compound_statement(int new_scope,ast_node * statements)1219 ast_compound_statement::ast_compound_statement(int new_scope,
1220 ast_node *statements)
1221 {
1222 this->new_scope = new_scope;
1223
1224 if (statements != NULL) {
1225 this->statements.push_degenerate_list_at_head(&statements->link);
1226 }
1227 }
1228
1229
1230 void
print(void) const1231 ast_expression::print(void) const
1232 {
1233 switch (oper) {
1234 case ast_assign:
1235 case ast_mul_assign:
1236 case ast_div_assign:
1237 case ast_mod_assign:
1238 case ast_add_assign:
1239 case ast_sub_assign:
1240 case ast_ls_assign:
1241 case ast_rs_assign:
1242 case ast_and_assign:
1243 case ast_xor_assign:
1244 case ast_or_assign:
1245 subexpressions[0]->print();
1246 printf("%s ", operator_string(oper));
1247 subexpressions[1]->print();
1248 break;
1249
1250 case ast_field_selection:
1251 subexpressions[0]->print();
1252 printf(". %s ", primary_expression.identifier);
1253 break;
1254
1255 case ast_plus:
1256 case ast_neg:
1257 case ast_bit_not:
1258 case ast_logic_not:
1259 case ast_pre_inc:
1260 case ast_pre_dec:
1261 printf("%s ", operator_string(oper));
1262 subexpressions[0]->print();
1263 break;
1264
1265 case ast_post_inc:
1266 case ast_post_dec:
1267 subexpressions[0]->print();
1268 printf("%s ", operator_string(oper));
1269 break;
1270
1271 case ast_conditional:
1272 subexpressions[0]->print();
1273 printf("? ");
1274 subexpressions[1]->print();
1275 printf(": ");
1276 subexpressions[2]->print();
1277 break;
1278
1279 case ast_array_index:
1280 subexpressions[0]->print();
1281 printf("[ ");
1282 subexpressions[1]->print();
1283 printf("] ");
1284 break;
1285
1286 case ast_function_call: {
1287 subexpressions[0]->print();
1288 printf("( ");
1289
1290 foreach_list_typed (ast_node, ast, link, &this->expressions) {
1291 if (&ast->link != this->expressions.get_head())
1292 printf(", ");
1293
1294 ast->print();
1295 }
1296
1297 printf(") ");
1298 break;
1299 }
1300
1301 case ast_identifier:
1302 printf("%s ", primary_expression.identifier);
1303 break;
1304
1305 case ast_int_constant:
1306 printf("%d ", primary_expression.int_constant);
1307 break;
1308
1309 case ast_uint_constant:
1310 printf("%u ", primary_expression.uint_constant);
1311 break;
1312
1313 case ast_float_constant:
1314 printf("%f ", primary_expression.float_constant);
1315 break;
1316
1317 case ast_double_constant:
1318 printf("%f ", primary_expression.double_constant);
1319 break;
1320
1321 case ast_int64_constant:
1322 printf("%" PRId64 " ", primary_expression.int64_constant);
1323 break;
1324
1325 case ast_uint64_constant:
1326 printf("%" PRIu64 " ", primary_expression.uint64_constant);
1327 break;
1328
1329 case ast_bool_constant:
1330 printf("%s ",
1331 primary_expression.bool_constant
1332 ? "true" : "false");
1333 break;
1334
1335 case ast_sequence: {
1336 printf("( ");
1337 foreach_list_typed (ast_node, ast, link, & this->expressions) {
1338 if (&ast->link != this->expressions.get_head())
1339 printf(", ");
1340
1341 ast->print();
1342 }
1343 printf(") ");
1344 break;
1345 }
1346
1347 case ast_aggregate: {
1348 printf("{ ");
1349 foreach_list_typed (ast_node, ast, link, & this->expressions) {
1350 if (&ast->link != this->expressions.get_head())
1351 printf(", ");
1352
1353 ast->print();
1354 }
1355 printf("} ");
1356 break;
1357 }
1358
1359 default:
1360 assert(0);
1361 break;
1362 }
1363 }
1364
ast_expression(int oper,ast_expression * ex0,ast_expression * ex1,ast_expression * ex2)1365 ast_expression::ast_expression(int oper,
1366 ast_expression *ex0,
1367 ast_expression *ex1,
1368 ast_expression *ex2) :
1369 primary_expression()
1370 {
1371 this->oper = ast_operators(oper);
1372 this->subexpressions[0] = ex0;
1373 this->subexpressions[1] = ex1;
1374 this->subexpressions[2] = ex2;
1375 this->non_lvalue_description = NULL;
1376 this->is_lhs = false;
1377 }
1378
1379
1380 void
print(void) const1381 ast_expression_statement::print(void) const
1382 {
1383 if (expression)
1384 expression->print();
1385
1386 printf("; ");
1387 }
1388
1389
ast_expression_statement(ast_expression * ex)1390 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1391 expression(ex)
1392 {
1393 /* empty */
1394 }
1395
1396
1397 void
print(void) const1398 ast_function::print(void) const
1399 {
1400 return_type->print();
1401 printf(" %s (", identifier);
1402
1403 foreach_list_typed(ast_node, ast, link, & this->parameters) {
1404 ast->print();
1405 }
1406
1407 printf(")");
1408 }
1409
1410
ast_function(void)1411 ast_function::ast_function(void)
1412 : return_type(NULL), identifier(NULL), is_definition(false),
1413 signature(NULL)
1414 {
1415 /* empty */
1416 }
1417
1418
1419 void
print(void) const1420 ast_fully_specified_type::print(void) const
1421 {
1422 _mesa_ast_type_qualifier_print(& qualifier);
1423 specifier->print();
1424 }
1425
1426
1427 void
print(void) const1428 ast_parameter_declarator::print(void) const
1429 {
1430 type->print();
1431 if (identifier)
1432 printf("%s ", identifier);
1433 ast_opt_array_dimensions_print(array_specifier);
1434 }
1435
1436
1437 void
print(void) const1438 ast_function_definition::print(void) const
1439 {
1440 prototype->print();
1441 body->print();
1442 }
1443
1444
1445 void
print(void) const1446 ast_declaration::print(void) const
1447 {
1448 printf("%s ", identifier);
1449 ast_opt_array_dimensions_print(array_specifier);
1450
1451 if (initializer) {
1452 printf("= ");
1453 initializer->print();
1454 }
1455 }
1456
1457
ast_declaration(const char * identifier,ast_array_specifier * array_specifier,ast_expression * initializer)1458 ast_declaration::ast_declaration(const char *identifier,
1459 ast_array_specifier *array_specifier,
1460 ast_expression *initializer)
1461 {
1462 this->identifier = identifier;
1463 this->array_specifier = array_specifier;
1464 this->initializer = initializer;
1465 }
1466
1467
1468 void
print(void) const1469 ast_declarator_list::print(void) const
1470 {
1471 assert(type || invariant);
1472
1473 if (type)
1474 type->print();
1475 else if (invariant)
1476 printf("invariant ");
1477 else
1478 printf("precise ");
1479
1480 foreach_list_typed (ast_node, ast, link, & this->declarations) {
1481 if (&ast->link != this->declarations.get_head())
1482 printf(", ");
1483
1484 ast->print();
1485 }
1486
1487 printf("; ");
1488 }
1489
1490
ast_declarator_list(ast_fully_specified_type * type)1491 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1492 {
1493 this->type = type;
1494 this->invariant = false;
1495 this->precise = false;
1496 }
1497
1498 void
print(void) const1499 ast_jump_statement::print(void) const
1500 {
1501 switch (mode) {
1502 case ast_continue:
1503 printf("continue; ");
1504 break;
1505 case ast_break:
1506 printf("break; ");
1507 break;
1508 case ast_return:
1509 printf("return ");
1510 if (opt_return_value)
1511 opt_return_value->print();
1512
1513 printf("; ");
1514 break;
1515 case ast_discard:
1516 printf("discard; ");
1517 break;
1518 }
1519 }
1520
1521
ast_jump_statement(int mode,ast_expression * return_value)1522 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1523 : opt_return_value(NULL)
1524 {
1525 this->mode = ast_jump_modes(mode);
1526
1527 if (mode == ast_return)
1528 opt_return_value = return_value;
1529 }
1530
1531
1532 void
print(void) const1533 ast_demote_statement::print(void) const
1534 {
1535 printf("demote; ");
1536 }
1537
1538
1539 void
print(void) const1540 ast_selection_statement::print(void) const
1541 {
1542 printf("if ( ");
1543 condition->print();
1544 printf(") ");
1545
1546 then_statement->print();
1547
1548 if (else_statement) {
1549 printf("else ");
1550 else_statement->print();
1551 }
1552 }
1553
1554
ast_selection_statement(ast_expression * condition,ast_node * then_statement,ast_node * else_statement)1555 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1556 ast_node *then_statement,
1557 ast_node *else_statement)
1558 {
1559 this->condition = condition;
1560 this->then_statement = then_statement;
1561 this->else_statement = else_statement;
1562 }
1563
1564
1565 void
print(void) const1566 ast_switch_statement::print(void) const
1567 {
1568 printf("switch ( ");
1569 test_expression->print();
1570 printf(") ");
1571
1572 body->print();
1573 }
1574
1575
ast_switch_statement(ast_expression * test_expression,ast_node * body)1576 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1577 ast_node *body)
1578 {
1579 this->test_expression = test_expression;
1580 this->body = body;
1581 }
1582
1583
1584 void
print(void) const1585 ast_switch_body::print(void) const
1586 {
1587 printf("{\n");
1588 if (stmts != NULL) {
1589 stmts->print();
1590 }
1591 printf("}\n");
1592 }
1593
1594
ast_switch_body(ast_case_statement_list * stmts)1595 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1596 {
1597 this->stmts = stmts;
1598 }
1599
1600
print(void) const1601 void ast_case_label::print(void) const
1602 {
1603 if (test_value != NULL) {
1604 printf("case ");
1605 test_value->print();
1606 printf(": ");
1607 } else {
1608 printf("default: ");
1609 }
1610 }
1611
1612
ast_case_label(ast_expression * test_value)1613 ast_case_label::ast_case_label(ast_expression *test_value)
1614 {
1615 this->test_value = test_value;
1616 }
1617
1618
print(void) const1619 void ast_case_label_list::print(void) const
1620 {
1621 foreach_list_typed(ast_node, ast, link, & this->labels) {
1622 ast->print();
1623 }
1624 printf("\n");
1625 }
1626
1627
ast_case_label_list(void)1628 ast_case_label_list::ast_case_label_list(void)
1629 {
1630 }
1631
1632
print(void) const1633 void ast_case_statement::print(void) const
1634 {
1635 labels->print();
1636 foreach_list_typed(ast_node, ast, link, & this->stmts) {
1637 ast->print();
1638 printf("\n");
1639 }
1640 }
1641
1642
ast_case_statement(ast_case_label_list * labels)1643 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1644 {
1645 this->labels = labels;
1646 }
1647
1648
print(void) const1649 void ast_case_statement_list::print(void) const
1650 {
1651 foreach_list_typed(ast_node, ast, link, & this->cases) {
1652 ast->print();
1653 }
1654 }
1655
1656
ast_case_statement_list(void)1657 ast_case_statement_list::ast_case_statement_list(void)
1658 {
1659 }
1660
1661
1662 void
print(void) const1663 ast_iteration_statement::print(void) const
1664 {
1665 switch (mode) {
1666 case ast_for:
1667 printf("for( ");
1668 if (init_statement)
1669 init_statement->print();
1670 printf("; ");
1671
1672 if (condition)
1673 condition->print();
1674 printf("; ");
1675
1676 if (rest_expression)
1677 rest_expression->print();
1678 printf(") ");
1679
1680 body->print();
1681 break;
1682
1683 case ast_while:
1684 printf("while ( ");
1685 if (condition)
1686 condition->print();
1687 printf(") ");
1688 body->print();
1689 break;
1690
1691 case ast_do_while:
1692 printf("do ");
1693 body->print();
1694 printf("while ( ");
1695 if (condition)
1696 condition->print();
1697 printf("); ");
1698 break;
1699 }
1700 }
1701
1702
ast_iteration_statement(int mode,ast_node * init,ast_node * condition,ast_expression * rest_expression,ast_node * body)1703 ast_iteration_statement::ast_iteration_statement(int mode,
1704 ast_node *init,
1705 ast_node *condition,
1706 ast_expression *rest_expression,
1707 ast_node *body)
1708 {
1709 this->mode = ast_iteration_modes(mode);
1710 this->init_statement = init;
1711 this->condition = condition;
1712 this->rest_expression = rest_expression;
1713 this->body = body;
1714 }
1715
1716
1717 void
print(void) const1718 ast_struct_specifier::print(void) const
1719 {
1720 printf("struct %s { ", name);
1721 foreach_list_typed(ast_node, ast, link, &this->declarations) {
1722 ast->print();
1723 }
1724 printf("} ");
1725 }
1726
1727
ast_struct_specifier(const char * identifier,ast_declarator_list * declarator_list)1728 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1729 ast_declarator_list *declarator_list)
1730 : name(identifier), layout(NULL), declarations(), is_declaration(true),
1731 type(NULL)
1732 {
1733 this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1734 }
1735
print(void) const1736 void ast_subroutine_list::print(void) const
1737 {
1738 foreach_list_typed (ast_node, ast, link, & this->declarations) {
1739 if (&ast->link != this->declarations.get_head())
1740 printf(", ");
1741 ast->print();
1742 }
1743 }
1744
1745 static void
set_shader_inout_layout(struct gl_shader * shader,struct _mesa_glsl_parse_state * state)1746 set_shader_inout_layout(struct gl_shader *shader,
1747 struct _mesa_glsl_parse_state *state)
1748 {
1749 /* Should have been prevented by the parser. */
1750 if (shader->Stage != MESA_SHADER_GEOMETRY &&
1751 shader->Stage != MESA_SHADER_TESS_EVAL &&
1752 shader->Stage != MESA_SHADER_COMPUTE) {
1753 assert(!state->in_qualifier->flags.i);
1754 }
1755
1756 if (shader->Stage != MESA_SHADER_COMPUTE) {
1757 /* Should have been prevented by the parser. */
1758 assert(!state->cs_input_local_size_specified);
1759 assert(!state->cs_input_local_size_variable_specified);
1760 assert(state->cs_derivative_group == DERIVATIVE_GROUP_NONE);
1761 }
1762
1763 if (shader->Stage != MESA_SHADER_FRAGMENT) {
1764 /* Should have been prevented by the parser. */
1765 assert(!state->fs_uses_gl_fragcoord);
1766 assert(!state->fs_redeclares_gl_fragcoord);
1767 assert(!state->fs_pixel_center_integer);
1768 assert(!state->fs_origin_upper_left);
1769 assert(!state->fs_early_fragment_tests);
1770 assert(!state->fs_inner_coverage);
1771 assert(!state->fs_post_depth_coverage);
1772 assert(!state->fs_pixel_interlock_ordered);
1773 assert(!state->fs_pixel_interlock_unordered);
1774 assert(!state->fs_sample_interlock_ordered);
1775 assert(!state->fs_sample_interlock_unordered);
1776 }
1777
1778 for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1779 if (state->out_qualifier->out_xfb_stride[i]) {
1780 unsigned xfb_stride;
1781 if (state->out_qualifier->out_xfb_stride[i]->
1782 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1783 true)) {
1784 shader->TransformFeedbackBufferStride[i] = xfb_stride;
1785 }
1786 }
1787 }
1788
1789 switch (shader->Stage) {
1790 case MESA_SHADER_TESS_CTRL:
1791 shader->info.TessCtrl.VerticesOut = 0;
1792 if (state->tcs_output_vertices_specified) {
1793 unsigned vertices;
1794 if (state->out_qualifier->vertices->
1795 process_qualifier_constant(state, "vertices", &vertices,
1796 false)) {
1797
1798 YYLTYPE loc = state->out_qualifier->vertices->get_location();
1799 if (vertices > state->Const.MaxPatchVertices) {
1800 _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1801 "GL_MAX_PATCH_VERTICES", vertices);
1802 }
1803 shader->info.TessCtrl.VerticesOut = vertices;
1804 }
1805 }
1806 break;
1807 case MESA_SHADER_TESS_EVAL:
1808 shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1809 if (state->in_qualifier->flags.q.prim_type)
1810 shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1811
1812 shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1813 if (state->in_qualifier->flags.q.vertex_spacing)
1814 shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1815
1816 shader->info.TessEval.VertexOrder = 0;
1817 if (state->in_qualifier->flags.q.ordering)
1818 shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1819
1820 shader->info.TessEval.PointMode = -1;
1821 if (state->in_qualifier->flags.q.point_mode)
1822 shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1823 break;
1824 case MESA_SHADER_GEOMETRY:
1825 shader->info.Geom.VerticesOut = -1;
1826 if (state->out_qualifier->flags.q.max_vertices) {
1827 unsigned qual_max_vertices;
1828 if (state->out_qualifier->max_vertices->
1829 process_qualifier_constant(state, "max_vertices",
1830 &qual_max_vertices, true)) {
1831
1832 if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1833 YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1834 _mesa_glsl_error(&loc, state,
1835 "maximum output vertices (%d) exceeds "
1836 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1837 qual_max_vertices);
1838 }
1839 shader->info.Geom.VerticesOut = qual_max_vertices;
1840 }
1841 }
1842
1843 if (state->gs_input_prim_type_specified) {
1844 shader->info.Geom.InputType = state->in_qualifier->prim_type;
1845 } else {
1846 shader->info.Geom.InputType = PRIM_UNKNOWN;
1847 }
1848
1849 if (state->out_qualifier->flags.q.prim_type) {
1850 shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1851 } else {
1852 shader->info.Geom.OutputType = PRIM_UNKNOWN;
1853 }
1854
1855 shader->info.Geom.Invocations = 0;
1856 if (state->in_qualifier->flags.q.invocations) {
1857 unsigned invocations;
1858 if (state->in_qualifier->invocations->
1859 process_qualifier_constant(state, "invocations",
1860 &invocations, false)) {
1861
1862 YYLTYPE loc = state->in_qualifier->invocations->get_location();
1863 if (invocations > state->Const.MaxGeometryShaderInvocations) {
1864 _mesa_glsl_error(&loc, state,
1865 "invocations (%d) exceeds "
1866 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1867 invocations);
1868 }
1869 shader->info.Geom.Invocations = invocations;
1870 }
1871 }
1872 break;
1873
1874 case MESA_SHADER_COMPUTE:
1875 if (state->cs_input_local_size_specified) {
1876 for (int i = 0; i < 3; i++)
1877 shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1878 } else {
1879 for (int i = 0; i < 3; i++)
1880 shader->info.Comp.LocalSize[i] = 0;
1881 }
1882
1883 shader->info.Comp.LocalSizeVariable =
1884 state->cs_input_local_size_variable_specified;
1885
1886 shader->info.Comp.DerivativeGroup = state->cs_derivative_group;
1887
1888 if (state->NV_compute_shader_derivatives_enable) {
1889 /* We allow multiple cs_input_layout nodes, but do not store them in
1890 * a convenient place, so for now live with an empty location error.
1891 */
1892 YYLTYPE loc = {0};
1893 if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_QUADS) {
1894 if (shader->info.Comp.LocalSize[0] % 2 != 0) {
1895 _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1896 "local group size whose first dimension "
1897 "is a multiple of 2\n");
1898 }
1899 if (shader->info.Comp.LocalSize[1] % 2 != 0) {
1900 _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1901 "local group size whose second dimension "
1902 "is a multiple of 2\n");
1903 }
1904 } else if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_LINEAR) {
1905 if ((shader->info.Comp.LocalSize[0] *
1906 shader->info.Comp.LocalSize[1] *
1907 shader->info.Comp.LocalSize[2]) % 4 != 0) {
1908 _mesa_glsl_error(&loc, state, "derivative_group_linearNV must be used with a "
1909 "local group size whose total number of invocations "
1910 "is a multiple of 4\n");
1911 }
1912 }
1913 }
1914
1915 break;
1916
1917 case MESA_SHADER_FRAGMENT:
1918 shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1919 shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1920 shader->pixel_center_integer = state->fs_pixel_center_integer;
1921 shader->origin_upper_left = state->fs_origin_upper_left;
1922 shader->ARB_fragment_coord_conventions_enable =
1923 state->ARB_fragment_coord_conventions_enable;
1924 shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1925 shader->InnerCoverage = state->fs_inner_coverage;
1926 shader->PostDepthCoverage = state->fs_post_depth_coverage;
1927 shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
1928 shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
1929 shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
1930 shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
1931 shader->BlendSupport = state->fs_blend_support;
1932 break;
1933
1934 default:
1935 /* Nothing to do. */
1936 break;
1937 }
1938
1939 shader->bindless_sampler = state->bindless_sampler_specified;
1940 shader->bindless_image = state->bindless_image_specified;
1941 shader->bound_sampler = state->bound_sampler_specified;
1942 shader->bound_image = state->bound_image_specified;
1943 shader->redeclares_gl_layer = state->redeclares_gl_layer;
1944 shader->layer_viewport_relative = state->layer_viewport_relative;
1945 }
1946
1947 /* src can be NULL if only the symbols found in the exec_list should be
1948 * copied
1949 */
1950 void
_mesa_glsl_copy_symbols_from_table(struct exec_list * shader_ir,struct glsl_symbol_table * src,struct glsl_symbol_table * dest)1951 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1952 struct glsl_symbol_table *src,
1953 struct glsl_symbol_table *dest)
1954 {
1955 foreach_in_list (ir_instruction, ir, shader_ir) {
1956 switch (ir->ir_type) {
1957 case ir_type_function:
1958 dest->add_function((ir_function *) ir);
1959 break;
1960 case ir_type_variable: {
1961 ir_variable *const var = (ir_variable *) ir;
1962
1963 if (var->data.mode != ir_var_temporary)
1964 dest->add_variable(var);
1965 break;
1966 }
1967 default:
1968 break;
1969 }
1970 }
1971
1972 if (src != NULL) {
1973 /* Explicitly copy the gl_PerVertex interface definitions because these
1974 * are needed to check they are the same during the interstage link.
1975 * They can’t necessarily be found via the exec_list because the members
1976 * might not be referenced. The GL spec still requires that they match
1977 * in that case.
1978 */
1979 const glsl_type *iface =
1980 src->get_interface("gl_PerVertex", ir_var_shader_in);
1981 if (iface)
1982 dest->add_interface(iface->name, iface, ir_var_shader_in);
1983
1984 iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1985 if (iface)
1986 dest->add_interface(iface->name, iface, ir_var_shader_out);
1987 }
1988 }
1989
1990 extern "C" {
1991
1992 static void
assign_subroutine_indexes(struct _mesa_glsl_parse_state * state)1993 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1994 {
1995 int j, k;
1996 int index = 0;
1997
1998 for (j = 0; j < state->num_subroutines; j++) {
1999 while (state->subroutines[j]->subroutine_index == -1) {
2000 for (k = 0; k < state->num_subroutines; k++) {
2001 if (state->subroutines[k]->subroutine_index == index)
2002 break;
2003 else if (k == state->num_subroutines - 1) {
2004 state->subroutines[j]->subroutine_index = index;
2005 }
2006 }
2007 index++;
2008 }
2009 }
2010 }
2011
2012 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)2013 add_builtin_defines(struct _mesa_glsl_parse_state *state,
2014 void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
2015 struct glcpp_parser *data,
2016 unsigned version,
2017 bool es)
2018 {
2019 unsigned gl_version = state->ctx->Extensions.Version;
2020 gl_api api = state->ctx->API;
2021
2022 if (gl_version != 0xff) {
2023 unsigned i;
2024 for (i = 0; i < state->num_supported_versions; i++) {
2025 if (state->supported_versions[i].ver == version &&
2026 state->supported_versions[i].es == es) {
2027 gl_version = state->supported_versions[i].gl_ver;
2028 break;
2029 }
2030 }
2031
2032 if (i == state->num_supported_versions)
2033 return;
2034 }
2035
2036 if (es)
2037 api = API_OPENGLES2;
2038
2039 for (unsigned i = 0;
2040 i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
2041 const _mesa_glsl_extension *extension
2042 = &_mesa_glsl_supported_extensions[i];
2043 if (extension->compatible_with_state(state, api, gl_version)) {
2044 add_builtin_define(data, extension->name, 1);
2045 }
2046 }
2047 }
2048
2049 /* Implements parsing checks that we can't do during parsing */
2050 static void
do_late_parsing_checks(struct _mesa_glsl_parse_state * state)2051 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
2052 {
2053 if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
2054 YYLTYPE loc;
2055 memset(&loc, 0, sizeof(loc));
2056 _mesa_glsl_error(&loc, state, "Compute shaders require "
2057 "GLSL 4.30 or GLSL ES 3.10");
2058 }
2059 }
2060
2061 static void
opt_shader_and_create_symbol_table(struct gl_context * ctx,struct glsl_symbol_table * source_symbols,struct gl_shader * shader)2062 opt_shader_and_create_symbol_table(struct gl_context *ctx,
2063 struct glsl_symbol_table *source_symbols,
2064 struct gl_shader *shader)
2065 {
2066 assert(shader->CompileStatus != COMPILE_FAILURE &&
2067 !shader->ir->is_empty());
2068
2069 struct gl_shader_compiler_options *options =
2070 &ctx->Const.ShaderCompilerOptions[shader->Stage];
2071
2072 /* Do some optimization at compile time to reduce shader IR size
2073 * and reduce later work if the same shader is linked multiple times
2074 */
2075 if (ctx->Const.GLSLOptimizeConservatively) {
2076 /* Run it just once. */
2077 do_common_optimization(shader->ir, false, false, options,
2078 ctx->Const.NativeIntegers);
2079 } else {
2080 /* Repeat it until it stops making changes. */
2081 while (do_common_optimization(shader->ir, false, false, options,
2082 ctx->Const.NativeIntegers))
2083 ;
2084 }
2085
2086 validate_ir_tree(shader->ir);
2087
2088 enum ir_variable_mode other;
2089 switch (shader->Stage) {
2090 case MESA_SHADER_VERTEX:
2091 other = ir_var_shader_in;
2092 break;
2093 case MESA_SHADER_FRAGMENT:
2094 other = ir_var_shader_out;
2095 break;
2096 default:
2097 /* Something invalid to ensure optimize_dead_builtin_uniforms
2098 * doesn't remove anything other than uniforms or constants.
2099 */
2100 other = ir_var_mode_count;
2101 break;
2102 }
2103
2104 optimize_dead_builtin_variables(shader->ir, other);
2105
2106 validate_ir_tree(shader->ir);
2107
2108 /* Retain any live IR, but trash the rest. */
2109 reparent_ir(shader->ir, shader->ir);
2110
2111 /* Destroy the symbol table. Create a new symbol table that contains only
2112 * the variables and functions that still exist in the IR. The symbol
2113 * table will be used later during linking.
2114 *
2115 * There must NOT be any freed objects still referenced by the symbol
2116 * table. That could cause the linker to dereference freed memory.
2117 *
2118 * We don't have to worry about types or interface-types here because those
2119 * are fly-weights that are looked up by glsl_type.
2120 */
2121 _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2122 shader->symbols);
2123 }
2124
2125 static bool
can_skip_compile(struct gl_context * ctx,struct gl_shader * shader,const char * source,bool force_recompile,bool source_has_shader_include)2126 can_skip_compile(struct gl_context *ctx, struct gl_shader *shader,
2127 const char *source, bool force_recompile,
2128 bool source_has_shader_include)
2129 {
2130 if (!force_recompile) {
2131 if (ctx->Cache) {
2132 char buf[41];
2133 disk_cache_compute_key(ctx->Cache, source, strlen(source),
2134 shader->sha1);
2135 if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2136 /* We've seen this shader before and know it compiles */
2137 if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2138 _mesa_sha1_format(buf, shader->sha1);
2139 fprintf(stderr, "deferring compile of shader: %s\n", buf);
2140 }
2141 shader->CompileStatus = COMPILE_SKIPPED;
2142
2143 free((void *)shader->FallbackSource);
2144
2145 /* Copy pre-processed shader include to fallback source otherwise
2146 * we have no guarantee the shader include source tree has not
2147 * changed.
2148 */
2149 shader->FallbackSource = source_has_shader_include ?
2150 strdup(source) : NULL;
2151 return true;
2152 }
2153 }
2154 } else {
2155 /* We should only ever end up here if a re-compile has been forced by a
2156 * shader cache miss. In which case we can skip the compile if its
2157 * already been done by a previous fallback or the initial compile call.
2158 */
2159 if (shader->CompileStatus == COMPILE_SUCCESS)
2160 return true;
2161 }
2162
2163 return false;
2164 }
2165
2166 void
_mesa_glsl_compile_shader(struct gl_context * ctx,struct gl_shader * shader,bool dump_ast,bool dump_hir,bool force_recompile)2167 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2168 bool dump_ast, bool dump_hir, bool force_recompile)
2169 {
2170 const char *source = force_recompile && shader->FallbackSource ?
2171 shader->FallbackSource : shader->Source;
2172
2173 /* Note this will be true for shaders the have #include inside comments
2174 * however that should be rare enough not to worry about.
2175 */
2176 bool source_has_shader_include =
2177 strstr(source, "#include") == NULL ? false : true;
2178
2179 /* If there was no shader include we can check the shader cache and skip
2180 * compilation before we run the preprocessor. We never skip compiling
2181 * shaders that use ARB_shading_language_include because we would need to
2182 * keep duplicate copies of the shader include source tree and paths.
2183 */
2184 if (!source_has_shader_include &&
2185 can_skip_compile(ctx, shader, source, force_recompile, false))
2186 return;
2187
2188 struct _mesa_glsl_parse_state *state =
2189 new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2190
2191 if (ctx->Const.GenerateTemporaryNames)
2192 (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2193 false, true);
2194
2195 if (!source_has_shader_include || !force_recompile) {
2196 state->error = glcpp_preprocess(state, &source, &state->info_log,
2197 add_builtin_defines, state, ctx);
2198 }
2199
2200 /* Now that we have run the preprocessor we can check the shader cache and
2201 * skip compilation if possible for those shaders that contained a shader
2202 * include.
2203 */
2204 if (source_has_shader_include &&
2205 can_skip_compile(ctx, shader, source, force_recompile, true))
2206 return;
2207
2208 if (!state->error) {
2209 _mesa_glsl_lexer_ctor(state, source);
2210 _mesa_glsl_parse(state);
2211 _mesa_glsl_lexer_dtor(state);
2212 do_late_parsing_checks(state);
2213 }
2214
2215 if (dump_ast) {
2216 foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2217 ast->print();
2218 }
2219 printf("\n\n");
2220 }
2221
2222 ralloc_free(shader->ir);
2223 shader->ir = new(shader) exec_list;
2224 if (!state->error && !state->translation_unit.is_empty())
2225 _mesa_ast_to_hir(shader->ir, state);
2226
2227 if (!state->error) {
2228 validate_ir_tree(shader->ir);
2229
2230 /* Print out the unoptimized IR. */
2231 if (dump_hir) {
2232 _mesa_print_ir(stdout, shader->ir, state);
2233 }
2234 }
2235
2236 if (shader->InfoLog)
2237 ralloc_free(shader->InfoLog);
2238
2239 if (!state->error)
2240 set_shader_inout_layout(shader, state);
2241
2242 shader->symbols = new(shader->ir) glsl_symbol_table;
2243 shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2244 shader->InfoLog = state->info_log;
2245 shader->Version = state->language_version;
2246 shader->IsES = state->es_shader;
2247
2248 struct gl_shader_compiler_options *options =
2249 &ctx->Const.ShaderCompilerOptions[shader->Stage];
2250
2251 if (!state->error && !shader->ir->is_empty()) {
2252 if (state->es_shader &&
2253 (options->LowerPrecisionFloat16 || options->LowerPrecisionInt16))
2254 lower_precision(options, shader->ir);
2255 lower_builtins(shader->ir);
2256 assign_subroutine_indexes(state);
2257 lower_subroutine(shader->ir, state);
2258 opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2259 }
2260
2261 if (!force_recompile) {
2262 free((void *)shader->FallbackSource);
2263
2264 /* Copy pre-processed shader include to fallback source otherwise we
2265 * have no guarantee the shader include source tree has not changed.
2266 */
2267 shader->FallbackSource = source_has_shader_include ?
2268 strdup(source) : NULL;
2269 }
2270
2271 delete state->symbols;
2272 ralloc_free(state);
2273
2274 if (ctx->Cache && shader->CompileStatus == COMPILE_SUCCESS) {
2275 char sha1_buf[41];
2276 disk_cache_put_key(ctx->Cache, shader->sha1);
2277 if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2278 _mesa_sha1_format(sha1_buf, shader->sha1);
2279 fprintf(stderr, "marking shader: %s\n", sha1_buf);
2280 }
2281 }
2282 }
2283
2284 } /* extern "C" */
2285 /**
2286 * Do the set of common optimizations passes
2287 *
2288 * \param ir List of instructions to be optimized
2289 * \param linked Is the shader linked? This enables
2290 * optimizations passes that remove code at
2291 * global scope and could cause linking to
2292 * fail.
2293 * \param uniform_locations_assigned Have locations already been assigned for
2294 * uniforms? This prevents the declarations
2295 * of unused uniforms from being removed.
2296 * The setting of this flag only matters if
2297 * \c linked is \c true.
2298 * \param options The driver's preferred shader options.
2299 * \param native_integers Selects optimizations that depend on the
2300 * implementations supporting integers
2301 * natively (as opposed to supporting
2302 * integers in floating point registers).
2303 */
2304 bool
do_common_optimization(exec_list * ir,bool linked,bool uniform_locations_assigned,const struct gl_shader_compiler_options * options,bool native_integers)2305 do_common_optimization(exec_list *ir, bool linked,
2306 bool uniform_locations_assigned,
2307 const struct gl_shader_compiler_options *options,
2308 bool native_integers)
2309 {
2310 const bool debug = false;
2311 bool progress = false;
2312
2313 #define OPT(PASS, ...) do { \
2314 if (debug) { \
2315 fprintf(stderr, "START GLSL optimization %s\n", #PASS); \
2316 const bool opt_progress = PASS(__VA_ARGS__); \
2317 progress = opt_progress || progress; \
2318 if (opt_progress) \
2319 _mesa_print_ir(stderr, ir, NULL); \
2320 fprintf(stderr, "GLSL optimization %s: %s progress\n", \
2321 #PASS, opt_progress ? "made" : "no"); \
2322 } else { \
2323 progress = PASS(__VA_ARGS__) || progress; \
2324 } \
2325 } while (false)
2326
2327 OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2328
2329 if (linked) {
2330 OPT(do_function_inlining, ir);
2331 OPT(do_dead_functions, ir);
2332 OPT(do_structure_splitting, ir);
2333 }
2334 propagate_invariance(ir);
2335 OPT(do_if_simplification, ir);
2336 OPT(opt_flatten_nested_if_blocks, ir);
2337 OPT(opt_conditional_discard, ir);
2338 OPT(do_copy_propagation_elements, ir);
2339
2340 if (options->OptimizeForAOS && !linked)
2341 OPT(opt_flip_matrices, ir);
2342
2343 if (linked && options->OptimizeForAOS) {
2344 OPT(do_vectorize, ir);
2345 }
2346
2347 if (linked)
2348 OPT(do_dead_code, ir, uniform_locations_assigned);
2349 else
2350 OPT(do_dead_code_unlinked, ir);
2351 OPT(do_dead_code_local, ir);
2352 OPT(do_tree_grafting, ir);
2353 OPT(do_constant_propagation, ir);
2354 if (linked)
2355 OPT(do_constant_variable, ir);
2356 else
2357 OPT(do_constant_variable_unlinked, ir);
2358 OPT(do_constant_folding, ir);
2359 OPT(do_minmax_prune, ir);
2360 OPT(do_rebalance_tree, ir);
2361 OPT(do_algebraic, ir, native_integers, options);
2362 OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2363 options->EmitNoCont, options->EmitNoLoops);
2364 OPT(do_vec_index_to_swizzle, ir);
2365 OPT(lower_vector_insert, ir, false);
2366 OPT(optimize_swizzles, ir);
2367
2368 /* Some drivers only call do_common_optimization() once rather than in a
2369 * loop, and split arrays causes each element of a constant array to
2370 * dereference is own copy of the entire array initilizer. This IR is not
2371 * something that can be generated manually in a shader and is not
2372 * accounted for by NIR optimisations, the result is an exponential slow
2373 * down in compilation speed as a constant arrays element count grows. To
2374 * avoid that here we make sure to always clean up the mess split arrays
2375 * causes to constant arrays.
2376 */
2377 bool array_split = optimize_split_arrays(ir, linked);
2378 if (array_split)
2379 do_constant_propagation(ir);
2380 progress |= array_split;
2381
2382 OPT(optimize_redundant_jumps, ir);
2383
2384 if (options->MaxUnrollIterations) {
2385 loop_state *ls = analyze_loop_variables(ir);
2386 if (ls->loop_found) {
2387 bool loop_progress = unroll_loops(ir, ls, options);
2388 while (loop_progress) {
2389 loop_progress = false;
2390 loop_progress |= do_constant_propagation(ir);
2391 loop_progress |= do_if_simplification(ir);
2392
2393 /* Some drivers only call do_common_optimization() once rather
2394 * than in a loop. So we must call do_lower_jumps() after
2395 * unrolling a loop because for drivers that use LLVM validation
2396 * will fail if a jump is not the last instruction in the block.
2397 * For example the following will fail LLVM validation:
2398 *
2399 * (loop (
2400 * ...
2401 * break
2402 * (assign (x) (var_ref v124) (expression int + (var_ref v124)
2403 * (constant int (1)) ) )
2404 * ))
2405 */
2406 loop_progress |= do_lower_jumps(ir, true, true,
2407 options->EmitNoMainReturn,
2408 options->EmitNoCont,
2409 options->EmitNoLoops);
2410 }
2411 progress |= loop_progress;
2412 }
2413 delete ls;
2414 }
2415
2416 #undef OPT
2417
2418 return progress;
2419 }
2420