src/compiler/glsl/glsl_parser_extras.cpp

   1 /*
   2  * Copyright © 2008, 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23 #include <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 *
  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
  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()
  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    this->zero_init = ctx->Const.GLSLZeroInit;
  86    this->gl_version = 20;
  87    this->compat_shader = true;
  88    this->es_shader = false;
  89    this->ARB_texture_rectangle_enable = true;
  90
  91    /* OpenGL ES 2.0 has different defaults from desktop GL. */
  92    if (ctx->API == API_OPENGLES2) {
  93       this->language_version = 100;
  94       this->es_shader = true;
  95       this->ARB_texture_rectangle_enable = false;
  96    }
  97
  98    this->extensions = &ctx->Extensions;
  99
 100    this->Const.MaxLights = ctx->Const.MaxLights;
 101    this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
 102    this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
 103    this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
 104    this->Const.MaxVertexAttribs = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs;
 105    this->Const.MaxVertexUniformComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxUniformComponents;
 106    this->Const.MaxVertexTextureImageUnits = ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits;
 107    this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
 108    this->Const.MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
 109    this->Const.MaxFragmentUniformComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxUniformComponents;
 110    this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset;
 111    this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset;
 112
 113    this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
 114
 115    this->Const.MaxDualSourceDrawBuffers = ctx->Const.MaxDualSourceDrawBuffers;
 116
 117    /* 1.50 constants */
 118    this->Const.MaxVertexOutputComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents;
 119    this->Const.MaxGeometryInputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxInputComponents;
 120    this->Const.MaxGeometryOutputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxOutputComponents;
 121    this->Const.MaxGeometryShaderInvocations = ctx->Const.MaxGeometryShaderInvocations;
 122    this->Const.MaxFragmentInputComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents;
 123    this->Const.MaxGeometryTextureImageUnits = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits;
 124    this->Const.MaxGeometryOutputVertices = ctx->Const.MaxGeometryOutputVertices;
 125    this->Const.MaxGeometryTotalOutputComponents = ctx->Const.MaxGeometryTotalOutputComponents;
 126    this->Const.MaxGeometryUniformComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxUniformComponents;
 127
 128    this->Const.MaxVertexAtomicCounters = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicCounters;
 129    this->Const.MaxTessControlAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters;
 130    this->Const.MaxTessEvaluationAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicCounters;
 131    this->Const.MaxGeometryAtomicCounters = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicCounters;
 132    this->Const.MaxFragmentAtomicCounters = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
 133    this->Const.MaxComputeAtomicCounters = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicCounters;
 134    this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
 135    this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
 136    this->Const.MaxVertexAtomicCounterBuffers =
 137       ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicBuffers;
 138    this->Const.MaxTessControlAtomicCounterBuffers =
 139       ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers;
 140    this->Const.MaxTessEvaluationAtomicCounterBuffers =
 141       ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers;
 142    this->Const.MaxGeometryAtomicCounterBuffers =
 143       ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers;
 144    this->Const.MaxFragmentAtomicCounterBuffers =
 145       ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
 146    this->Const.MaxComputeAtomicCounterBuffers =
 147       ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers;
 148    this->Const.MaxCombinedAtomicCounterBuffers =
 149       ctx->Const.MaxCombinedAtomicBuffers;
 150    this->Const.MaxAtomicCounterBufferSize =
 151       ctx->Const.MaxAtomicBufferSize;
 152
 153    /* ARB_enhanced_layouts constants */
 154    this->Const.MaxTransformFeedbackBuffers = ctx->Const.MaxTransformFeedbackBuffers;
 155    this->Const.MaxTransformFeedbackInterleavedComponents = ctx->Const.MaxTransformFeedbackInterleavedComponents;
 156
 157    /* Compute shader constants */
 158    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupCount); i++)
 159       this->Const.MaxComputeWorkGroupCount[i] = ctx->Const.MaxComputeWorkGroupCount[i];
 160    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupSize); i++)
 161       this->Const.MaxComputeWorkGroupSize[i] = ctx->Const.MaxComputeWorkGroupSize[i];
 162
 163    this->Const.MaxComputeTextureImageUnits = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
 164    this->Const.MaxComputeUniformComponents = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxUniformComponents;
 165
 166    this->Const.MaxImageUnits = ctx->Const.MaxImageUnits;
 167    this->Const.MaxCombinedShaderOutputResources = ctx->Const.MaxCombinedShaderOutputResources;
 168    this->Const.MaxImageSamples = ctx->Const.MaxImageSamples;
 169    this->Const.MaxVertexImageUniforms = ctx->Const.Program[MESA_SHADER_VERTEX].MaxImageUniforms;
 170    this->Const.MaxTessControlImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms;
 171    this->Const.MaxTessEvaluationImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms;
 172    this->Const.MaxGeometryImageUniforms = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxImageUniforms;
 173    this->Const.MaxFragmentImageUniforms = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxImageUniforms;
 174    this->Const.MaxComputeImageUniforms = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
 175    this->Const.MaxCombinedImageUniforms = ctx->Const.MaxCombinedImageUniforms;
 176
 177    /* ARB_viewport_array */
 178    this->Const.MaxViewports = ctx->Const.MaxViewports;
 179
 180    /* tessellation shader constants */
 181    this->Const.MaxPatchVertices = ctx->Const.MaxPatchVertices;
 182    this->Const.MaxTessGenLevel = ctx->Const.MaxTessGenLevel;
 183    this->Const.MaxTessControlInputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents;
 184    this->Const.MaxTessControlOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents;
 185    this->Const.MaxTessControlTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits;
 186    this->Const.MaxTessEvaluationInputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents;
 187    this->Const.MaxTessEvaluationOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents;
 188    this->Const.MaxTessEvaluationTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits;
 189    this->Const.MaxTessPatchComponents = ctx->Const.MaxTessPatchComponents;
 190    this->Const.MaxTessControlTotalOutputComponents = ctx->Const.MaxTessControlTotalOutputComponents;
 191    this->Const.MaxTessControlUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents;
 192    this->Const.MaxTessEvaluationUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents;
 193
 194    /* GL 4.5 / OES_sample_variables */
 195    this->Const.MaxSamples = ctx->Const.MaxSamples;
 196
 197    this->current_function = NULL;
 198    this->toplevel_ir = NULL;
 199    this->found_return = false;
 200    this->all_invariant = false;
 201    this->user_structures = NULL;
 202    this->num_user_structures = 0;
 203    this->num_subroutines = 0;
 204    this->subroutines = NULL;
 205    this->num_subroutine_types = 0;
 206    this->subroutine_types = NULL;
 207
 208    /* supported_versions should be large enough to support the known desktop
 209     * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
 210     */
 211    STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 4) ==
 212                  ARRAY_SIZE(this->supported_versions));
 213
 214    /* Populate the list of supported GLSL versions */
 215    /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
 216     * the OpenGL 3.2 Core context is supported, this logic will need
 217     * change.  Older versions of GLSL are no longer supported
 218     * outside the compatibility contexts of 3.x.
 219     */
 220    this->num_supported_versions = 0;
 221    if (_mesa_is_desktop_gl(ctx)) {
 222       for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
 223          if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
 224             this->supported_versions[this->num_supported_versions].ver
 225                = known_desktop_glsl_versions[i];
 226             this->supported_versions[this->num_supported_versions].gl_ver
 227                = known_desktop_gl_versions[i];
 228             this->supported_versions[this->num_supported_versions].es = false;
 229             this->num_supported_versions++;
 230          }
 231       }
 232    }
 233    if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
 234       this->supported_versions[this->num_supported_versions].ver = 100;
 235       this->supported_versions[this->num_supported_versions].gl_ver = 20;
 236       this->supported_versions[this->num_supported_versions].es = true;
 237       this->num_supported_versions++;
 238    }
 239    if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
 240       this->supported_versions[this->num_supported_versions].ver = 300;
 241       this->supported_versions[this->num_supported_versions].gl_ver = 30;
 242       this->supported_versions[this->num_supported_versions].es = true;
 243       this->num_supported_versions++;
 244    }
 245    if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
 246       this->supported_versions[this->num_supported_versions].ver = 310;
 247       this->supported_versions[this->num_supported_versions].gl_ver = 31;
 248       this->supported_versions[this->num_supported_versions].es = true;
 249       this->num_supported_versions++;
 250    }
 251    if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
 252        ctx->Extensions.ARB_ES3_2_compatibility) {
 253       this->supported_versions[this->num_supported_versions].ver = 320;
 254       this->supported_versions[this->num_supported_versions].gl_ver = 32;
 255       this->supported_versions[this->num_supported_versions].es = true;
 256       this->num_supported_versions++;
 257    }
 258
 259    /* Create a string for use in error messages to tell the user which GLSL
 260     * versions are supported.
 261     */
 262    char *supported = ralloc_strdup(this, "");
 263    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 264       unsigned ver = this->supported_versions[i].ver;
 265       const char *const prefix = (i == 0)
 266          ? ""
 267          : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
 268       const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
 269
 270       ralloc_asprintf_append(& supported, "%s%u.%02u%s",
 271                              prefix,
 272                              ver / 100, ver % 100,
 273                              suffix);
 274    }
 275
 276    this->supported_version_string = supported;
 277
 278    if (ctx->Const.ForceGLSLExtensionsWarn)
 279       _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
 280
 281    this->default_uniform_qualifier = new(this) ast_type_qualifier();
 282    this->default_uniform_qualifier->flags.q.shared = 1;
 283    this->default_uniform_qualifier->flags.q.column_major = 1;
 284
 285    this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
 286    this->default_shader_storage_qualifier->flags.q.shared = 1;
 287    this->default_shader_storage_qualifier->flags.q.column_major = 1;
 288
 289    this->fs_uses_gl_fragcoord = false;
 290    this->fs_redeclares_gl_fragcoord = false;
 291    this->fs_origin_upper_left = false;
 292    this->fs_pixel_center_integer = false;
 293    this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
 294
 295    this->gs_input_prim_type_specified = false;
 296    this->tcs_output_vertices_specified = false;
 297    this->gs_input_size = 0;
 298    this->in_qualifier = new(this) ast_type_qualifier();
 299    this->out_qualifier = new(this) ast_type_qualifier();
 300    this->fs_early_fragment_tests = false;
 301    this->fs_inner_coverage = false;
 302    this->fs_post_depth_coverage = false;
 303    this->fs_pixel_interlock_ordered = false;
 304    this->fs_pixel_interlock_unordered = false;
 305    this->fs_sample_interlock_ordered = false;
 306    this->fs_sample_interlock_unordered = false;
 307    this->fs_blend_support = 0;
 308    memset(this->atomic_counter_offsets, 0,
 309           sizeof(this->atomic_counter_offsets));
 310    this->allow_extension_directive_midshader =
 311       ctx->Const.AllowGLSLExtensionDirectiveMidShader;
 312    this->allow_builtin_variable_redeclaration =
 313       ctx->Const.AllowGLSLBuiltinVariableRedeclaration;
 314
 315    this->cs_input_local_size_variable_specified = false;
 316
 317    /* ARB_bindless_texture */
 318    this->bindless_sampler_specified = false;
 319    this->bindless_image_specified = false;
 320    this->bound_sampler_specified = false;
 321    this->bound_image_specified = false;
 322 }
 323
 324 /**
 325  * Determine whether the current GLSL version is sufficiently high to support
 326  * a certain feature, and generate an error message if it isn't.
 327  *
 328  * \param required_glsl_version and \c required_glsl_es_version are
 329  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 330  *
 331  * \param locp is the parser location where the error should be reported.
 332  *
 333  * \param fmt (and additional arguments) constitute a printf-style error
 334  * message to report if the version check fails.  Information about the
 335  * current and required GLSL versions will be appended.  So, for example, if
 336  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 337  * "foo unsupported") is called, the error message will be "foo unsupported in
 338  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 339  */
 340 bool
 341 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 342                                       unsigned required_glsl_es_version,
 343                                       YYLTYPE *locp, const char *fmt, ...)
 344 {
 345    if (this->is_version(required_glsl_version, required_glsl_es_version))
 346       return true;
 347
 348    va_list args;
 349    va_start(args, fmt);
 350    char *problem = ralloc_vasprintf(this, fmt, args);
 351    va_end(args);
 352    const char *glsl_version_string
 353       = glsl_compute_version_string(this, false, required_glsl_version);
 354    const char *glsl_es_version_string
 355       = glsl_compute_version_string(this, true, required_glsl_es_version);
 356    const char *requirement_string = "";
 357    if (required_glsl_version && required_glsl_es_version) {
 358       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 359                                            glsl_version_string,
 360                                            glsl_es_version_string);
 361    } else if (required_glsl_version) {
 362       requirement_string = ralloc_asprintf(this, " (%s required)",
 363                                            glsl_version_string);
 364    } else if (required_glsl_es_version) {
 365       requirement_string = ralloc_asprintf(this, " (%s required)",
 366                                            glsl_es_version_string);
 367    }
 368    _mesa_glsl_error(locp, this, "%s in %s%s",
 369                     problem, this->get_version_string(),
 370                     requirement_string);
 371
 372    return false;
 373 }
 374
 375 /**
 376  * Process a GLSL #version directive.
 377  *
 378  * \param version is the integer that follows the #version token.
 379  *
 380  * \param ident is a string identifier that follows the integer, if any is
 381  * present.  Otherwise NULL.
 382  */
 383 void
 384 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 385                                                   const char *ident)
 386 {
 387    bool es_token_present = false;
 388    bool compat_token_present = false;
 389    if (ident) {
 390       if (strcmp(ident, "es") == 0) {
 391          es_token_present = true;
 392       } else if (version >= 150) {
 393          if (strcmp(ident, "core") == 0) {
 394             /* Accept the token.  There's no need to record that this is
 395              * a core profile shader since that's the only profile we support.
 396              */
 397          } else if (strcmp(ident, "compatibility") == 0) {
 398             compat_token_present = true;
 399
 400             if (this->ctx->API != API_OPENGL_COMPAT) {
 401                _mesa_glsl_error(locp, this,
 402                                 "the compatibility profile is not supported");
 403             }
 404          } else {
 405             _mesa_glsl_error(locp, this,
 406                              "\"%s\" is not a valid shading language profile; "
 407                              "if present, it must be \"core\"", ident);
 408          }
 409       } else {
 410          _mesa_glsl_error(locp, this,
 411                           "illegal text following version number");
 412       }
 413    }
 414
 415    this->es_shader = es_token_present;
 416    if (version == 100) {
 417       if (es_token_present) {
 418          _mesa_glsl_error(locp, this,
 419                           "GLSL 1.00 ES should be selected using "
 420                           "`#version 100'");
 421       } else {
 422          this->es_shader = true;
 423       }
 424    }
 425
 426    if (this->es_shader) {
 427       this->ARB_texture_rectangle_enable = false;
 428    }
 429
 430    if (this->forced_language_version)
 431       this->language_version = this->forced_language_version;
 432    else
 433       this->language_version = version;
 434
 435    this->compat_shader = compat_token_present ||
 436                          (this->ctx->API == API_OPENGL_COMPAT &&
 437                           this->language_version == 140) ||
 438                          (!this->es_shader && this->language_version < 140);
 439
 440    bool supported = false;
 441    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 442       if (this->supported_versions[i].ver == this->language_version
 443           && this->supported_versions[i].es == this->es_shader) {
 444          this->gl_version = this->supported_versions[i].gl_ver;
 445          supported = true;
 446          break;
 447       }
 448    }
 449
 450    if (!supported) {
 451       _mesa_glsl_error(locp, this, "%s is not supported. "
 452                        "Supported versions are: %s",
 453                        this->get_version_string(),
 454                        this->supported_version_string);
 455
 456       /* On exit, the language_version must be set to a valid value.
 457        * Later calls to _mesa_glsl_initialize_types will misbehave if
 458        * the version is invalid.
 459        */
 460       switch (this->ctx->API) {
 461       case API_OPENGL_COMPAT:
 462       case API_OPENGL_CORE:
 463          this->language_version = this->ctx->Const.GLSLVersion;
 464          break;
 465
 466       case API_OPENGLES:
 467          assert(!"Should not get here.");
 468          /* FALLTHROUGH */
 469
 470       case API_OPENGLES2:
 471          this->language_version = 100;
 472          break;
 473       }
 474    }
 475 }
 476
 477
 478 /* This helper function will append the given message to the shader's
 479    info log and report it via GL_ARB_debug_output. Per that extension,
 480    'type' is one of the enum values classifying the message, and
 481    'id' is the implementation-defined ID of the given message. */
 482 static void
 483 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 484                GLenum type, const char *fmt, va_list ap)
 485 {
 486    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 487    GLuint msg_id = 0;
 488
 489    assert(state->info_log != NULL);
 490
 491    /* Get the offset that the new message will be written to. */
 492    int msg_offset = strlen(state->info_log);
 493
 494    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 495                                             locp->source,
 496                                             locp->first_line,
 497                                             locp->first_column,
 498                                             error ? "error" : "warning");
 499    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 500
 501    const char *const msg = &state->info_log[msg_offset];
 502    struct gl_context *ctx = state->ctx;
 503
 504    /* Report the error via GL_ARB_debug_output. */
 505    _mesa_shader_debug(ctx, type, &msg_id, msg);
 506
 507    ralloc_strcat(&state->info_log, "\n");
 508 }
 509
 510 void
 511 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 512                  const char *fmt, ...)
 513 {
 514    va_list ap;
 515
 516    state->error = true;
 517
 518    va_start(ap, fmt);
 519    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 520    va_end(ap);
 521 }
 522
 523
 524 void
 525 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 526                    const char *fmt, ...)
 527 {
 528    va_list ap;
 529
 530    va_start(ap, fmt);
 531    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 532    va_end(ap);
 533 }
 534
 535
 536 /**
 537  * Enum representing the possible behaviors that can be specified in
 538  * an #extension directive.
 539  */
 540 enum ext_behavior {
 541    extension_disable,
 542    extension_enable,
 543    extension_require,
 544    extension_warn
 545 };
 546
 547 /**
 548  * Element type for _mesa_glsl_supported_extensions
 549  */
 550 struct _mesa_glsl_extension {
 551    /**
 552     * Name of the extension when referred to in a GLSL extension
 553     * statement
 554     */
 555    const char *name;
 556
 557    /**
 558     * Whether this extension is a part of AEP
 559     */
 560    bool aep;
 561
 562    /**
 563     * Predicate that checks whether the relevant extension is available for
 564     * this context.
 565     */
 566    bool (*available_pred)(const struct gl_context *,
 567                           gl_api api, uint8_t version);
 568
 569    /**
 570     * Flag in the _mesa_glsl_parse_state struct that should be set
 571     * when this extension is enabled.
 572     *
 573     * See note in _mesa_glsl_extension::supported_flag about "pointer
 574     * to member" types.
 575     */
 576    bool _mesa_glsl_parse_state::* enable_flag;
 577
 578    /**
 579     * Flag in the _mesa_glsl_parse_state struct that should be set
 580     * when the shader requests "warn" behavior for this extension.
 581     *
 582     * See note in _mesa_glsl_extension::supported_flag about "pointer
 583     * to member" types.
 584     */
 585    bool _mesa_glsl_parse_state::* warn_flag;
 586
 587
 588    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 589                               gl_api api, uint8_t gl_version) const;
 590    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 591 };
 592
 593 /** Checks if the context supports a user-facing extension */
 594 #define EXT(name_str, driver_cap, ...) \
 595 static MAYBE_UNUSED bool \
 596 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 597 { \
 598    return ctx->Extensions.driver_cap && (version >= \
 599           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 600 }
 601 #include "main/extensions_table.h"
 602 #undef EXT
 603
 604 #define EXT(NAME)                                           \
 605    { "GL_" #NAME, false, has_##NAME,                        \
 606      &_mesa_glsl_parse_state::NAME##_enable,                \
 607      &_mesa_glsl_parse_state::NAME##_warn }
 608
 609 #define EXT_AEP(NAME)                                       \
 610    { "GL_" #NAME, true, has_##NAME,                         \
 611      &_mesa_glsl_parse_state::NAME##_enable,                \
 612      &_mesa_glsl_parse_state::NAME##_warn }
 613
 614 /**
 615  * Table of extensions that can be enabled/disabled within a shader,
 616  * and the conditions under which they are supported.
 617  */
 618 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 619    /* ARB extensions go here, sorted alphabetically.
 620     */
 621    EXT(ARB_ES3_1_compatibility),
 622    EXT(ARB_ES3_2_compatibility),
 623    EXT(ARB_arrays_of_arrays),
 624    EXT(ARB_bindless_texture),
 625    EXT(ARB_compatibility),
 626    EXT(ARB_compute_shader),
 627    EXT(ARB_compute_variable_group_size),
 628    EXT(ARB_conservative_depth),
 629    EXT(ARB_cull_distance),
 630    EXT(ARB_derivative_control),
 631    EXT(ARB_draw_buffers),
 632    EXT(ARB_draw_instanced),
 633    EXT(ARB_enhanced_layouts),
 634    EXT(ARB_explicit_attrib_location),
 635    EXT(ARB_explicit_uniform_location),
 636    EXT(ARB_fragment_coord_conventions),
 637    EXT(ARB_fragment_layer_viewport),
 638    EXT(ARB_fragment_shader_interlock),
 639    EXT(ARB_gpu_shader5),
 640    EXT(ARB_gpu_shader_fp64),
 641    EXT(ARB_gpu_shader_int64),
 642    EXT(ARB_post_depth_coverage),
 643    EXT(ARB_sample_shading),
 644    EXT(ARB_separate_shader_objects),
 645    EXT(ARB_shader_atomic_counter_ops),
 646    EXT(ARB_shader_atomic_counters),
 647    EXT(ARB_shader_ballot),
 648    EXT(ARB_shader_bit_encoding),
 649    EXT(ARB_shader_clock),
 650    EXT(ARB_shader_draw_parameters),
 651    EXT(ARB_shader_group_vote),
 652    EXT(ARB_shader_image_load_store),
 653    EXT(ARB_shader_image_size),
 654    EXT(ARB_shader_precision),
 655    EXT(ARB_shader_stencil_export),
 656    EXT(ARB_shader_storage_buffer_object),
 657    EXT(ARB_shader_subroutine),
 658    EXT(ARB_shader_texture_image_samples),
 659    EXT(ARB_shader_texture_lod),
 660    EXT(ARB_shader_viewport_layer_array),
 661    EXT(ARB_shading_language_420pack),
 662    EXT(ARB_shading_language_packing),
 663    EXT(ARB_tessellation_shader),
 664    EXT(ARB_texture_cube_map_array),
 665    EXT(ARB_texture_gather),
 666    EXT(ARB_texture_multisample),
 667    EXT(ARB_texture_query_levels),
 668    EXT(ARB_texture_query_lod),
 669    EXT(ARB_texture_rectangle),
 670    EXT(ARB_uniform_buffer_object),
 671    EXT(ARB_vertex_attrib_64bit),
 672    EXT(ARB_viewport_array),
 673
 674    /* KHR extensions go here, sorted alphabetically.
 675     */
 676    EXT_AEP(KHR_blend_equation_advanced),
 677
 678    /* OES extensions go here, sorted alphabetically.
 679     */
 680    EXT(OES_EGL_image_external),
 681    EXT(OES_EGL_image_external_essl3),
 682    EXT(OES_geometry_point_size),
 683    EXT(OES_geometry_shader),
 684    EXT(OES_gpu_shader5),
 685    EXT(OES_primitive_bounding_box),
 686    EXT_AEP(OES_sample_variables),
 687    EXT_AEP(OES_shader_image_atomic),
 688    EXT(OES_shader_io_blocks),
 689    EXT_AEP(OES_shader_multisample_interpolation),
 690    EXT(OES_standard_derivatives),
 691    EXT(OES_tessellation_point_size),
 692    EXT(OES_tessellation_shader),
 693    EXT(OES_texture_3D),
 694    EXT(OES_texture_buffer),
 695    EXT(OES_texture_cube_map_array),
 696    EXT_AEP(OES_texture_storage_multisample_2d_array),
 697    EXT(OES_viewport_array),
 698
 699    /* All other extensions go here, sorted alphabetically.
 700     */
 701    EXT(AMD_conservative_depth),
 702    EXT(AMD_gpu_shader_int64),
 703    EXT(AMD_shader_stencil_export),
 704    EXT(AMD_shader_trinary_minmax),
 705    EXT(AMD_vertex_shader_layer),
 706    EXT(AMD_vertex_shader_viewport_index),
 707    EXT(ANDROID_extension_pack_es31a),
 708    EXT(EXT_blend_func_extended),
 709    EXT(EXT_frag_depth),
 710    EXT(EXT_draw_buffers),
 711    EXT(EXT_clip_cull_distance),
 712    EXT(EXT_geometry_point_size),
 713    EXT_AEP(EXT_geometry_shader),
 714    EXT_AEP(EXT_gpu_shader5),
 715    EXT_AEP(EXT_primitive_bounding_box),
 716    EXT(EXT_separate_shader_objects),
 717    EXT(EXT_shader_framebuffer_fetch),
 718    EXT(EXT_shader_framebuffer_fetch_non_coherent),
 719    EXT(EXT_shader_integer_mix),
 720    EXT_AEP(EXT_shader_io_blocks),
 721    EXT(EXT_shader_samples_identical),
 722    EXT(EXT_tessellation_point_size),
 723    EXT_AEP(EXT_tessellation_shader),
 724    EXT(EXT_texture_array),
 725    EXT_AEP(EXT_texture_buffer),
 726    EXT_AEP(EXT_texture_cube_map_array),
 727    EXT(INTEL_conservative_rasterization),
 728    EXT(INTEL_shader_atomic_float_minmax),
 729    EXT(MESA_shader_integer_functions),
 730    EXT(NV_fragment_shader_interlock),
 731    EXT(NV_image_formats),
 732    EXT(NV_shader_atomic_float),
 733 };
 734
 735 #undef EXT
 736
 737
 738 /**
 739  * Determine whether a given extension is compatible with the target,
 740  * API, and extension information in the current parser state.
 741  */
 742 bool _mesa_glsl_extension::compatible_with_state(
 743       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 744 {
 745    return this->available_pred(state->ctx, api, gl_version);
 746 }
 747
 748 /**
 749  * Set the appropriate flags in the parser state to establish the
 750  * given behavior for this extension.
 751  */
 752 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 753                                      ext_behavior behavior) const
 754 {
 755    /* Note: the ->* operator indexes into state by the
 756     * offsets this->enable_flag and this->warn_flag.  See
 757     * _mesa_glsl_extension::supported_flag for more info.
 758     */
 759    state->*(this->enable_flag) = (behavior != extension_disable);
 760    state->*(this->warn_flag)   = (behavior == extension_warn);
 761 }
 762
 763 /**
 764  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 765  * the name is not found, return NULL.
 766  */
 767 static const _mesa_glsl_extension *find_extension(const char *name)
 768 {
 769    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 770       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 771          return &_mesa_glsl_supported_extensions[i];
 772       }
 773    }
 774    return NULL;
 775 }
 776
 777 bool
 778 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 779                              const char *behavior_string, YYLTYPE *behavior_locp,
 780                              _mesa_glsl_parse_state *state)
 781 {
 782    uint8_t gl_version = state->ctx->Extensions.Version;
 783    gl_api api = state->ctx->API;
 784    ext_behavior behavior;
 785    if (strcmp(behavior_string, "warn") == 0) {
 786       behavior = extension_warn;
 787    } else if (strcmp(behavior_string, "require") == 0) {
 788       behavior = extension_require;
 789    } else if (strcmp(behavior_string, "enable") == 0) {
 790       behavior = extension_enable;
 791    } else if (strcmp(behavior_string, "disable") == 0) {
 792       behavior = extension_disable;
 793    } else {
 794       _mesa_glsl_error(behavior_locp, state,
 795                        "unknown extension behavior `%s'",
 796                        behavior_string);
 797       return false;
 798    }
 799
 800    /* If we're in a desktop context but with an ES shader, use an ES API enum
 801     * to verify extension availability.
 802     */
 803    if (state->es_shader && api != API_OPENGLES2)
 804       api = API_OPENGLES2;
 805    /* Use the language-version derived GL version to extension checks, unless
 806     * we're using meta, which sets the version to the max.
 807     */
 808    if (gl_version != 0xff)
 809       gl_version = state->gl_version;
 810
 811    if (strcmp(name, "all") == 0) {
 812       if ((behavior == extension_enable) || (behavior == extension_require)) {
 813          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 814                           (behavior == extension_enable)
 815                           ? "enable" : "require");
 816          return false;
 817       } else {
 818          for (unsigned i = 0;
 819               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 820             const _mesa_glsl_extension *extension
 821                = &_mesa_glsl_supported_extensions[i];
 822             if (extension->compatible_with_state(state, api, gl_version)) {
 823                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 824             }
 825          }
 826       }
 827    } else {
 828       const _mesa_glsl_extension *extension = find_extension(name);
 829       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 830          extension->set_flags(state, behavior);
 831          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 832             for (unsigned i = 0;
 833                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 834                const _mesa_glsl_extension *extension =
 835                   &_mesa_glsl_supported_extensions[i];
 836
 837                if (!extension->aep)
 838                   continue;
 839                /* AEP should not be enabled if all of the sub-extensions can't
 840                 * also be enabled. This is not the proper layer to do such
 841                 * error-checking though.
 842                 */
 843                assert(extension->compatible_with_state(state, api, gl_version));
 844                extension->set_flags(state, behavior);
 845             }
 846          }
 847       } else {
 848          static const char fmt[] = "extension `%s' unsupported in %s shader";
 849
 850          if (behavior == extension_require) {
 851             _mesa_glsl_error(name_locp, state, fmt,
 852                              name, _mesa_shader_stage_to_string(state->stage));
 853             return false;
 854          } else {
 855             _mesa_glsl_warning(name_locp, state, fmt,
 856                                name, _mesa_shader_stage_to_string(state->stage));
 857          }
 858       }
 859    }
 860
 861    return true;
 862 }
 863
 864
 865 /**
 866  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 867  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 868  * (process_array_constructor, et al) sufficient information to do type
 869  * checking.
 870  *
 871  * Operates on assignments involving an aggregate initializer. E.g.,
 872  *
 873  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 874  *
 875  * or more ridiculously,
 876  *
 877  * struct S {
 878  *     vec4 v[2];
 879  * };
 880  *
 881  * struct {
 882  *     S a[2], b;
 883  *     int c;
 884  * } aggregate = {
 885  *     {
 886  *         {
 887  *             {
 888  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 889  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 890  *             } // a[0].v
 891  *         }, // a[0]
 892  *         {
 893  *             {
 894  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 895  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 896  *             } // a[1].v
 897  *         } // a[1]
 898  *     }, // a
 899  *     {
 900  *         {
 901  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 902  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 903  *         } // b.v
 904  *     }, // b
 905  *     4 // c
 906  * };
 907  *
 908  * This pass is necessary because the right-hand side of <type> e = { ... }
 909  * doesn't contain sufficient information to determine if the types match.
 910  */
 911 void
 912 _mesa_ast_set_aggregate_type(const glsl_type *type,
 913                              ast_expression *expr)
 914 {
 915    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 916    ai->constructor_type = type;
 917
 918    /* If the aggregate is an array, recursively set its elements' types. */
 919    if (type->is_array()) {
 920       /* Each array element has the type type->fields.array.
 921        *
 922        * E.g., if <type> if struct S[2] we want to set each element's type to
 923        * struct S.
 924        */
 925       for (exec_node *expr_node = ai->expressions.get_head_raw();
 926            !expr_node->is_tail_sentinel();
 927            expr_node = expr_node->next) {
 928          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 929                                                link);
 930
 931          if (expr->oper == ast_aggregate)
 932             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 933       }
 934
 935    /* If the aggregate is a struct, recursively set its fields' types. */
 936    } else if (type->is_record()) {
 937       exec_node *expr_node = ai->expressions.get_head_raw();
 938
 939       /* Iterate through the struct's fields. */
 940       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 941            i++, expr_node = expr_node->next) {
 942          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 943                                                link);
 944
 945          if (expr->oper == ast_aggregate) {
 946             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 947          }
 948       }
 949    /* If the aggregate is a matrix, set its columns' types. */
 950    } else if (type->is_matrix()) {
 951       for (exec_node *expr_node = ai->expressions.get_head_raw();
 952            !expr_node->is_tail_sentinel();
 953            expr_node = expr_node->next) {
 954          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 955                                                link);
 956
 957          if (expr->oper == ast_aggregate)
 958             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 959       }
 960    }
 961 }
 962
 963 void
 964 _mesa_ast_process_interface_block(YYLTYPE *locp,
 965                                   _mesa_glsl_parse_state *state,
 966                                   ast_interface_block *const block,
 967                                   const struct ast_type_qualifier &q)
 968 {
 969    if (q.flags.q.buffer) {
 970       if (!state->has_shader_storage_buffer_objects()) {
 971          _mesa_glsl_error(locp, state,
 972                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 973                           "required for defining shader storage blocks");
 974       } else if (state->ARB_shader_storage_buffer_object_warn) {
 975          _mesa_glsl_warning(locp, state,
 976                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 977                             "required for defining shader storage blocks");
 978       }
 979    } else if (q.flags.q.uniform) {
 980       if (!state->has_uniform_buffer_objects()) {
 981          _mesa_glsl_error(locp, state,
 982                           "#version 140 / GL_ARB_uniform_buffer_object "
 983                           "required for defining uniform blocks");
 984       } else if (state->ARB_uniform_buffer_object_warn) {
 985          _mesa_glsl_warning(locp, state,
 986                             "#version 140 / GL_ARB_uniform_buffer_object "
 987                             "required for defining uniform blocks");
 988       }
 989    } else {
 990       if (!state->has_shader_io_blocks()) {
 991          if (state->es_shader) {
 992             _mesa_glsl_error(locp, state,
 993                              "GL_OES_shader_io_blocks or #version 320 "
 994                              "required for using interface blocks");
 995          } else {
 996             _mesa_glsl_error(locp, state,
 997                              "#version 150 required for using "
 998                              "interface blocks");
 999          }
1000       }
1001    }
1002
1003    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
1004     * "It is illegal to have an input block in a vertex shader
1005     *  or an output block in a fragment shader"
1006     */
1007    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
1008       _mesa_glsl_error(locp, state,
1009                        "`in' interface block is not allowed for "
1010                        "a vertex shader");
1011    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1012       _mesa_glsl_error(locp, state,
1013                        "`out' interface block is not allowed for "
1014                        "a fragment shader");
1015    }
1016
1017    /* Since block arrays require names, and both features are added in
1018     * the same language versions, we don't have to explicitly
1019     * version-check both things.
1020     */
1021    if (block->instance_name != NULL) {
1022       state->check_version(150, 300, locp, "interface blocks with "
1023                            "an instance name are not allowed");
1024    }
1025
1026    ast_type_qualifier::bitset_t interface_type_mask;
1027    struct ast_type_qualifier temp_type_qualifier;
1028
1029    /* Get a bitmask containing only the in/out/uniform/buffer
1030     * flags, allowing us to ignore other irrelevant flags like
1031     * interpolation qualifiers.
1032     */
1033    temp_type_qualifier.flags.i = 0;
1034    temp_type_qualifier.flags.q.uniform = true;
1035    temp_type_qualifier.flags.q.in = true;
1036    temp_type_qualifier.flags.q.out = true;
1037    temp_type_qualifier.flags.q.buffer = true;
1038    temp_type_qualifier.flags.q.patch = true;
1039    interface_type_mask = temp_type_qualifier.flags.i;
1040
1041    /* Get the block's interface qualifier.  The interface_qualifier
1042     * production rule guarantees that only one bit will be set (and
1043     * it will be in/out/uniform).
1044     */
1045    ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1046
1047    block->default_layout.flags.i |= block_interface_qualifier;
1048
1049    if (state->stage == MESA_SHADER_GEOMETRY &&
1050        state->has_explicit_attrib_stream() &&
1051        block->default_layout.flags.q.out) {
1052       /* Assign global layout's stream value. */
1053       block->default_layout.flags.q.stream = 1;
1054       block->default_layout.flags.q.explicit_stream = 0;
1055       block->default_layout.stream = state->out_qualifier->stream;
1056    }
1057
1058    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1059       /* Assign global layout's xfb_buffer value. */
1060       block->default_layout.flags.q.xfb_buffer = 1;
1061       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1062       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1063    }
1064
1065    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1066       ast_type_qualifier& qualifier = member->type->qualifier;
1067       if ((qualifier.flags.i & interface_type_mask) == 0) {
1068          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1069           * "If no optional qualifier is used in a member declaration, the
1070           *  qualifier of the variable is just in, out, or uniform as declared
1071           *  by interface-qualifier."
1072           */
1073          qualifier.flags.i |= block_interface_qualifier;
1074       } else if ((qualifier.flags.i & interface_type_mask) !=
1075                  block_interface_qualifier) {
1076          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1077           * "If optional qualifiers are used, they can include interpolation
1078           *  and storage qualifiers and they must declare an input, output,
1079           *  or uniform variable consistent with the interface qualifier of
1080           *  the block."
1081           */
1082          _mesa_glsl_error(locp, state,
1083                           "uniform/in/out qualifier on "
1084                           "interface block member does not match "
1085                           "the interface block");
1086       }
1087
1088       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1089          _mesa_glsl_error(locp, state,
1090                           "invariant qualifiers can be used only "
1091                           "in interface block members for shader "
1092                           "inputs or outputs");
1093    }
1094 }
1095
1096 static void
1097 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1098 {
1099    if (q->is_subroutine_decl())
1100       printf("subroutine ");
1101
1102    if (q->subroutine_list) {
1103       printf("subroutine (");
1104       q->subroutine_list->print();
1105       printf(")");
1106    }
1107
1108    if (q->flags.q.constant)
1109       printf("const ");
1110
1111    if (q->flags.q.invariant)
1112       printf("invariant ");
1113
1114    if (q->flags.q.attribute)
1115       printf("attribute ");
1116
1117    if (q->flags.q.varying)
1118       printf("varying ");
1119
1120    if (q->flags.q.in && q->flags.q.out)
1121       printf("inout ");
1122    else {
1123       if (q->flags.q.in)
1124          printf("in ");
1125
1126       if (q->flags.q.out)
1127          printf("out ");
1128    }
1129
1130    if (q->flags.q.centroid)
1131       printf("centroid ");
1132    if (q->flags.q.sample)
1133       printf("sample ");
1134    if (q->flags.q.patch)
1135       printf("patch ");
1136    if (q->flags.q.uniform)
1137       printf("uniform ");
1138    if (q->flags.q.buffer)
1139       printf("buffer ");
1140    if (q->flags.q.smooth)
1141       printf("smooth ");
1142    if (q->flags.q.flat)
1143       printf("flat ");
1144    if (q->flags.q.noperspective)
1145       printf("noperspective ");
1146 }
1147
1148
1149 void
1150 ast_node::print(void) const
1151 {
1152    printf("unhandled node ");
1153 }
1154
1155
1156 ast_node::ast_node(void)
1157 {
1158    this->location.source = 0;
1159    this->location.first_line = 0;
1160    this->location.first_column = 0;
1161    this->location.last_line = 0;
1162    this->location.last_column = 0;
1163 }
1164
1165
1166 static void
1167 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1168 {
1169    if (array_specifier)
1170       array_specifier->print();
1171 }
1172
1173
1174 void
1175 ast_compound_statement::print(void) const
1176 {
1177    printf("{\n");
1178
1179    foreach_list_typed(ast_node, ast, link, &this->statements) {
1180       ast->print();
1181    }
1182
1183    printf("}\n");
1184 }
1185
1186
1187 ast_compound_statement::ast_compound_statement(int new_scope,
1188                                                ast_node *statements)
1189 {
1190    this->new_scope = new_scope;
1191
1192    if (statements != NULL) {
1193       this->statements.push_degenerate_list_at_head(&statements->link);
1194    }
1195 }
1196
1197
1198 void
1199 ast_expression::print(void) const
1200 {
1201    switch (oper) {
1202    case ast_assign:
1203    case ast_mul_assign:
1204    case ast_div_assign:
1205    case ast_mod_assign:
1206    case ast_add_assign:
1207    case ast_sub_assign:
1208    case ast_ls_assign:
1209    case ast_rs_assign:
1210    case ast_and_assign:
1211    case ast_xor_assign:
1212    case ast_or_assign:
1213       subexpressions[0]->print();
1214       printf("%s ", operator_string(oper));
1215       subexpressions[1]->print();
1216       break;
1217
1218    case ast_field_selection:
1219       subexpressions[0]->print();
1220       printf(". %s ", primary_expression.identifier);
1221       break;
1222
1223    case ast_plus:
1224    case ast_neg:
1225    case ast_bit_not:
1226    case ast_logic_not:
1227    case ast_pre_inc:
1228    case ast_pre_dec:
1229       printf("%s ", operator_string(oper));
1230       subexpressions[0]->print();
1231       break;
1232
1233    case ast_post_inc:
1234    case ast_post_dec:
1235       subexpressions[0]->print();
1236       printf("%s ", operator_string(oper));
1237       break;
1238
1239    case ast_conditional:
1240       subexpressions[0]->print();
1241       printf("? ");
1242       subexpressions[1]->print();
1243       printf(": ");
1244       subexpressions[2]->print();
1245       break;
1246
1247    case ast_array_index:
1248       subexpressions[0]->print();
1249       printf("[ ");
1250       subexpressions[1]->print();
1251       printf("] ");
1252       break;
1253
1254    case ast_function_call: {
1255       subexpressions[0]->print();
1256       printf("( ");
1257
1258       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1259          if (&ast->link != this->expressions.get_head())
1260             printf(", ");
1261
1262          ast->print();
1263       }
1264
1265       printf(") ");
1266       break;
1267    }
1268
1269    case ast_identifier:
1270       printf("%s ", primary_expression.identifier);
1271       break;
1272
1273    case ast_int_constant:
1274       printf("%d ", primary_expression.int_constant);
1275       break;
1276
1277    case ast_uint_constant:
1278       printf("%u ", primary_expression.uint_constant);
1279       break;
1280
1281    case ast_float_constant:
1282       printf("%f ", primary_expression.float_constant);
1283       break;
1284
1285    case ast_double_constant:
1286       printf("%f ", primary_expression.double_constant);
1287       break;
1288
1289    case ast_int64_constant:
1290       printf("%" PRId64 " ", primary_expression.int64_constant);
1291       break;
1292
1293    case ast_uint64_constant:
1294       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1295       break;
1296
1297    case ast_bool_constant:
1298       printf("%s ",
1299              primary_expression.bool_constant
1300              ? "true" : "false");
1301       break;
1302
1303    case ast_sequence: {
1304       printf("( ");
1305       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1306          if (&ast->link != this->expressions.get_head())
1307             printf(", ");
1308
1309          ast->print();
1310       }
1311       printf(") ");
1312       break;
1313    }
1314
1315    case ast_aggregate: {
1316       printf("{ ");
1317       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1318          if (&ast->link != this->expressions.get_head())
1319             printf(", ");
1320
1321          ast->print();
1322       }
1323       printf("} ");
1324       break;
1325    }
1326
1327    default:
1328       assert(0);
1329       break;
1330    }
1331 }
1332
1333 ast_expression::ast_expression(int oper,
1334                                ast_expression *ex0,
1335                                ast_expression *ex1,
1336                                ast_expression *ex2) :
1337    primary_expression()
1338 {
1339    this->oper = ast_operators(oper);
1340    this->subexpressions[0] = ex0;
1341    this->subexpressions[1] = ex1;
1342    this->subexpressions[2] = ex2;
1343    this->non_lvalue_description = NULL;
1344    this->is_lhs = false;
1345 }
1346
1347
1348 void
1349 ast_expression_statement::print(void) const
1350 {
1351    if (expression)
1352       expression->print();
1353
1354    printf("; ");
1355 }
1356
1357
1358 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1359    expression(ex)
1360 {
1361    /* empty */
1362 }
1363
1364
1365 void
1366 ast_function::print(void) const
1367 {
1368    return_type->print();
1369    printf(" %s (", identifier);
1370
1371    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1372       ast->print();
1373    }
1374
1375    printf(")");
1376 }
1377
1378
1379 ast_function::ast_function(void)
1380    : return_type(NULL), identifier(NULL), is_definition(false),
1381      signature(NULL)
1382 {
1383    /* empty */
1384 }
1385
1386
1387 void
1388 ast_fully_specified_type::print(void) const
1389 {
1390    _mesa_ast_type_qualifier_print(& qualifier);
1391    specifier->print();
1392 }
1393
1394
1395 void
1396 ast_parameter_declarator::print(void) const
1397 {
1398    type->print();
1399    if (identifier)
1400       printf("%s ", identifier);
1401    ast_opt_array_dimensions_print(array_specifier);
1402 }
1403
1404
1405 void
1406 ast_function_definition::print(void) const
1407 {
1408    prototype->print();
1409    body->print();
1410 }
1411
1412
1413 void
1414 ast_declaration::print(void) const
1415 {
1416    printf("%s ", identifier);
1417    ast_opt_array_dimensions_print(array_specifier);
1418
1419    if (initializer) {
1420       printf("= ");
1421       initializer->print();
1422    }
1423 }
1424
1425
1426 ast_declaration::ast_declaration(const char *identifier,
1427                                  ast_array_specifier *array_specifier,
1428                                  ast_expression *initializer)
1429 {
1430    this->identifier = identifier;
1431    this->array_specifier = array_specifier;
1432    this->initializer = initializer;
1433 }
1434
1435
1436 void
1437 ast_declarator_list::print(void) const
1438 {
1439    assert(type || invariant);
1440
1441    if (type)
1442       type->print();
1443    else if (invariant)
1444       printf("invariant ");
1445    else
1446       printf("precise ");
1447
1448    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1449       if (&ast->link != this->declarations.get_head())
1450          printf(", ");
1451
1452       ast->print();
1453    }
1454
1455    printf("; ");
1456 }
1457
1458
1459 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1460 {
1461    this->type = type;
1462    this->invariant = false;
1463    this->precise = false;
1464 }
1465
1466 void
1467 ast_jump_statement::print(void) const
1468 {
1469    switch (mode) {
1470    case ast_continue:
1471       printf("continue; ");
1472       break;
1473    case ast_break:
1474       printf("break; ");
1475       break;
1476    case ast_return:
1477       printf("return ");
1478       if (opt_return_value)
1479          opt_return_value->print();
1480
1481       printf("; ");
1482       break;
1483    case ast_discard:
1484       printf("discard; ");
1485       break;
1486    }
1487 }
1488
1489
1490 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1491    : opt_return_value(NULL)
1492 {
1493    this->mode = ast_jump_modes(mode);
1494
1495    if (mode == ast_return)
1496       opt_return_value = return_value;
1497 }
1498
1499
1500 void
1501 ast_selection_statement::print(void) const
1502 {
1503    printf("if ( ");
1504    condition->print();
1505    printf(") ");
1506
1507    then_statement->print();
1508
1509    if (else_statement) {
1510       printf("else ");
1511       else_statement->print();
1512    }
1513 }
1514
1515
1516 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1517                                                  ast_node *then_statement,
1518                                                  ast_node *else_statement)
1519 {
1520    this->condition = condition;
1521    this->then_statement = then_statement;
1522    this->else_statement = else_statement;
1523 }
1524
1525
1526 void
1527 ast_switch_statement::print(void) const
1528 {
1529    printf("switch ( ");
1530    test_expression->print();
1531    printf(") ");
1532
1533    body->print();
1534 }
1535
1536
1537 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1538                                            ast_node *body)
1539 {
1540    this->test_expression = test_expression;
1541    this->body = body;
1542 }
1543
1544
1545 void
1546 ast_switch_body::print(void) const
1547 {
1548    printf("{\n");
1549    if (stmts != NULL) {
1550       stmts->print();
1551    }
1552    printf("}\n");
1553 }
1554
1555
1556 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1557 {
1558    this->stmts = stmts;
1559 }
1560
1561
1562 void ast_case_label::print(void) const
1563 {
1564    if (test_value != NULL) {
1565       printf("case ");
1566       test_value->print();
1567       printf(": ");
1568    } else {
1569       printf("default: ");
1570    }
1571 }
1572
1573
1574 ast_case_label::ast_case_label(ast_expression *test_value)
1575 {
1576    this->test_value = test_value;
1577 }
1578
1579
1580 void ast_case_label_list::print(void) const
1581 {
1582    foreach_list_typed(ast_node, ast, link, & this->labels) {
1583       ast->print();
1584    }
1585    printf("\n");
1586 }
1587
1588
1589 ast_case_label_list::ast_case_label_list(void)
1590 {
1591 }
1592
1593
1594 void ast_case_statement::print(void) const
1595 {
1596    labels->print();
1597    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1598       ast->print();
1599       printf("\n");
1600    }
1601 }
1602
1603
1604 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1605 {
1606    this->labels = labels;
1607 }
1608
1609
1610 void ast_case_statement_list::print(void) const
1611 {
1612    foreach_list_typed(ast_node, ast, link, & this->cases) {
1613       ast->print();
1614    }
1615 }
1616
1617
1618 ast_case_statement_list::ast_case_statement_list(void)
1619 {
1620 }
1621
1622
1623 void
1624 ast_iteration_statement::print(void) const
1625 {
1626    switch (mode) {
1627    case ast_for:
1628       printf("for( ");
1629       if (init_statement)
1630          init_statement->print();
1631       printf("; ");
1632
1633       if (condition)
1634          condition->print();
1635       printf("; ");
1636
1637       if (rest_expression)
1638          rest_expression->print();
1639       printf(") ");
1640
1641       body->print();
1642       break;
1643
1644    case ast_while:
1645       printf("while ( ");
1646       if (condition)
1647          condition->print();
1648       printf(") ");
1649       body->print();
1650       break;
1651
1652    case ast_do_while:
1653       printf("do ");
1654       body->print();
1655       printf("while ( ");
1656       if (condition)
1657          condition->print();
1658       printf("); ");
1659       break;
1660    }
1661 }
1662
1663
1664 ast_iteration_statement::ast_iteration_statement(int mode,
1665                                                  ast_node *init,
1666                                                  ast_node *condition,
1667                                                  ast_expression *rest_expression,
1668                                                  ast_node *body)
1669 {
1670    this->mode = ast_iteration_modes(mode);
1671    this->init_statement = init;
1672    this->condition = condition;
1673    this->rest_expression = rest_expression;
1674    this->body = body;
1675 }
1676
1677
1678 void
1679 ast_struct_specifier::print(void) const
1680 {
1681    printf("struct %s { ", name);
1682    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1683       ast->print();
1684    }
1685    printf("} ");
1686 }
1687
1688
1689 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1690                                            ast_declarator_list *declarator_list)
1691    : name(identifier), layout(NULL), declarations(), is_declaration(true),
1692      type(NULL)
1693 {
1694    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1695 }
1696
1697 void ast_subroutine_list::print(void) const
1698 {
1699    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1700       if (&ast->link != this->declarations.get_head())
1701          printf(", ");
1702       ast->print();
1703    }
1704 }
1705
1706 static void
1707 set_shader_inout_layout(struct gl_shader *shader,
1708                      struct _mesa_glsl_parse_state *state)
1709 {
1710    /* Should have been prevented by the parser. */
1711    if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1712        shader->Stage == MESA_SHADER_VERTEX) {
1713       assert(!state->in_qualifier->flags.i);
1714    } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1715               shader->Stage != MESA_SHADER_TESS_EVAL) {
1716       assert(!state->in_qualifier->flags.i);
1717    }
1718
1719    if (shader->Stage != MESA_SHADER_COMPUTE) {
1720       /* Should have been prevented by the parser. */
1721       assert(!state->cs_input_local_size_specified);
1722       assert(!state->cs_input_local_size_variable_specified);
1723    }
1724
1725    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1726       /* Should have been prevented by the parser. */
1727       assert(!state->fs_uses_gl_fragcoord);
1728       assert(!state->fs_redeclares_gl_fragcoord);
1729       assert(!state->fs_pixel_center_integer);
1730       assert(!state->fs_origin_upper_left);
1731       assert(!state->fs_early_fragment_tests);
1732       assert(!state->fs_inner_coverage);
1733       assert(!state->fs_post_depth_coverage);
1734       assert(!state->fs_pixel_interlock_ordered);
1735       assert(!state->fs_pixel_interlock_unordered);
1736       assert(!state->fs_sample_interlock_ordered);
1737       assert(!state->fs_sample_interlock_unordered);
1738    }
1739
1740    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1741       if (state->out_qualifier->out_xfb_stride[i]) {
1742          unsigned xfb_stride;
1743          if (state->out_qualifier->out_xfb_stride[i]->
1744                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1745                 true)) {
1746             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1747          }
1748       }
1749    }
1750
1751    switch (shader->Stage) {
1752    case MESA_SHADER_TESS_CTRL:
1753       shader->info.TessCtrl.VerticesOut = 0;
1754       if (state->tcs_output_vertices_specified) {
1755          unsigned vertices;
1756          if (state->out_qualifier->vertices->
1757                process_qualifier_constant(state, "vertices", &vertices,
1758                                           false)) {
1759
1760             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1761             if (vertices > state->Const.MaxPatchVertices) {
1762                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1763                                 "GL_MAX_PATCH_VERTICES", vertices);
1764             }
1765             shader->info.TessCtrl.VerticesOut = vertices;
1766          }
1767       }
1768       break;
1769    case MESA_SHADER_TESS_EVAL:
1770       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1771       if (state->in_qualifier->flags.q.prim_type)
1772          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1773
1774       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1775       if (state->in_qualifier->flags.q.vertex_spacing)
1776          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1777
1778       shader->info.TessEval.VertexOrder = 0;
1779       if (state->in_qualifier->flags.q.ordering)
1780          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1781
1782       shader->info.TessEval.PointMode = -1;
1783       if (state->in_qualifier->flags.q.point_mode)
1784          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1785       break;
1786    case MESA_SHADER_GEOMETRY:
1787       shader->info.Geom.VerticesOut = -1;
1788       if (state->out_qualifier->flags.q.max_vertices) {
1789          unsigned qual_max_vertices;
1790          if (state->out_qualifier->max_vertices->
1791                process_qualifier_constant(state, "max_vertices",
1792                                           &qual_max_vertices, true)) {
1793
1794             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1795                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1796                _mesa_glsl_error(&loc, state,
1797                                 "maximum output vertices (%d) exceeds "
1798                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1799                                 qual_max_vertices);
1800             }
1801             shader->info.Geom.VerticesOut = qual_max_vertices;
1802          }
1803       }
1804
1805       if (state->gs_input_prim_type_specified) {
1806          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1807       } else {
1808          shader->info.Geom.InputType = PRIM_UNKNOWN;
1809       }
1810
1811       if (state->out_qualifier->flags.q.prim_type) {
1812          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1813       } else {
1814          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1815       }
1816
1817       shader->info.Geom.Invocations = 0;
1818       if (state->in_qualifier->flags.q.invocations) {
1819          unsigned invocations;
1820          if (state->in_qualifier->invocations->
1821                process_qualifier_constant(state, "invocations",
1822                                           &invocations, false)) {
1823
1824             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1825             if (invocations > state->Const.MaxGeometryShaderInvocations) {
1826                _mesa_glsl_error(&loc, state,
1827                                 "invocations (%d) exceeds "
1828                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1829                                 invocations);
1830             }
1831             shader->info.Geom.Invocations = invocations;
1832          }
1833       }
1834       break;
1835
1836    case MESA_SHADER_COMPUTE:
1837       if (state->cs_input_local_size_specified) {
1838          for (int i = 0; i < 3; i++)
1839             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1840       } else {
1841          for (int i = 0; i < 3; i++)
1842             shader->info.Comp.LocalSize[i] = 0;
1843       }
1844
1845       shader->info.Comp.LocalSizeVariable =
1846          state->cs_input_local_size_variable_specified;
1847       break;
1848
1849    case MESA_SHADER_FRAGMENT:
1850       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1851       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1852       shader->pixel_center_integer = state->fs_pixel_center_integer;
1853       shader->origin_upper_left = state->fs_origin_upper_left;
1854       shader->ARB_fragment_coord_conventions_enable =
1855          state->ARB_fragment_coord_conventions_enable;
1856       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1857       shader->InnerCoverage = state->fs_inner_coverage;
1858       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1859       shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
1860       shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
1861       shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
1862       shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
1863       shader->BlendSupport = state->fs_blend_support;
1864       break;
1865
1866    default:
1867       /* Nothing to do. */
1868       break;
1869    }
1870
1871    shader->bindless_sampler = state->bindless_sampler_specified;
1872    shader->bindless_image = state->bindless_image_specified;
1873    shader->bound_sampler = state->bound_sampler_specified;
1874    shader->bound_image = state->bound_image_specified;
1875 }
1876
1877 /* src can be NULL if only the symbols found in the exec_list should be
1878  * copied
1879  */
1880 void
1881 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1882                                    struct glsl_symbol_table *src,
1883                                    struct glsl_symbol_table *dest)
1884 {
1885    foreach_in_list (ir_instruction, ir, shader_ir) {
1886       switch (ir->ir_type) {
1887       case ir_type_function:
1888          dest->add_function((ir_function *) ir);
1889          break;
1890       case ir_type_variable: {
1891          ir_variable *const var = (ir_variable *) ir;
1892
1893          if (var->data.mode != ir_var_temporary)
1894             dest->add_variable(var);
1895          break;
1896       }
1897       default:
1898          break;
1899       }
1900    }
1901
1902    if (src != NULL) {
1903       /* Explicitly copy the gl_PerVertex interface definitions because these
1904        * are needed to check they are the same during the interstage link.
1905        * They can’t necessarily be found via the exec_list because the members
1906        * might not be referenced. The GL spec still requires that they match
1907        * in that case.
1908        */
1909       const glsl_type *iface =
1910          src->get_interface("gl_PerVertex", ir_var_shader_in);
1911       if (iface)
1912          dest->add_interface(iface->name, iface, ir_var_shader_in);
1913
1914       iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1915       if (iface)
1916          dest->add_interface(iface->name, iface, ir_var_shader_out);
1917    }
1918 }
1919
1920 extern "C" {
1921
1922 static void
1923 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1924 {
1925    int j, k;
1926    int index = 0;
1927
1928    for (j = 0; j < state->num_subroutines; j++) {
1929       while (state->subroutines[j]->subroutine_index == -1) {
1930          for (k = 0; k < state->num_subroutines; k++) {
1931             if (state->subroutines[k]->subroutine_index == index)
1932                break;
1933             else if (k == state->num_subroutines - 1) {
1934                state->subroutines[j]->subroutine_index = index;
1935             }
1936          }
1937          index++;
1938       }
1939    }
1940 }
1941
1942 static void
1943 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1944                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1945                     struct glcpp_parser *data,
1946                     unsigned version,
1947                     bool es)
1948 {
1949    unsigned gl_version = state->ctx->Extensions.Version;
1950    gl_api api = state->ctx->API;
1951
1952    if (gl_version != 0xff) {
1953       unsigned i;
1954       for (i = 0; i < state->num_supported_versions; i++) {
1955          if (state->supported_versions[i].ver == version &&
1956              state->supported_versions[i].es == es) {
1957             gl_version = state->supported_versions[i].gl_ver;
1958             break;
1959          }
1960       }
1961
1962       if (i == state->num_supported_versions)
1963          return;
1964    }
1965
1966    if (es)
1967       api = API_OPENGLES2;
1968
1969    for (unsigned i = 0;
1970         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
1971       const _mesa_glsl_extension *extension
1972          = &_mesa_glsl_supported_extensions[i];
1973       if (extension->compatible_with_state(state, api, gl_version)) {
1974          add_builtin_define(data, extension->name, 1);
1975       }
1976    }
1977 }
1978
1979 /* Implements parsing checks that we can't do during parsing */
1980 static void
1981 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
1982 {
1983    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
1984       YYLTYPE loc;
1985       memset(&loc, 0, sizeof(loc));
1986       _mesa_glsl_error(&loc, state, "Compute shaders require "
1987                        "GLSL 4.30 or GLSL ES 3.10");
1988    }
1989 }
1990
1991 static void
1992 opt_shader_and_create_symbol_table(struct gl_context *ctx,
1993                                    struct glsl_symbol_table *source_symbols,
1994                                    struct gl_shader *shader)
1995 {
1996    assert(shader->CompileStatus != COMPILE_FAILURE &&
1997           !shader->ir->is_empty());
1998
1999    struct gl_shader_compiler_options *options =
2000       &ctx->Const.ShaderCompilerOptions[shader->Stage];
2001
2002    /* Do some optimization at compile time to reduce shader IR size
2003     * and reduce later work if the same shader is linked multiple times
2004     */
2005    if (ctx->Const.GLSLOptimizeConservatively) {
2006       /* Run it just once. */
2007       do_common_optimization(shader->ir, false, false, options,
2008                              ctx->Const.NativeIntegers);
2009    } else {
2010       /* Repeat it until it stops making changes. */
2011       while (do_common_optimization(shader->ir, false, false, options,
2012                                     ctx->Const.NativeIntegers))
2013          ;
2014    }
2015
2016    validate_ir_tree(shader->ir);
2017
2018    enum ir_variable_mode other;
2019    switch (shader->Stage) {
2020    case MESA_SHADER_VERTEX:
2021       other = ir_var_shader_in;
2022       break;
2023    case MESA_SHADER_FRAGMENT:
2024       other = ir_var_shader_out;
2025       break;
2026    default:
2027       /* Something invalid to ensure optimize_dead_builtin_uniforms
2028        * doesn't remove anything other than uniforms or constants.
2029        */
2030       other = ir_var_mode_count;
2031       break;
2032    }
2033
2034    optimize_dead_builtin_variables(shader->ir, other);
2035
2036    validate_ir_tree(shader->ir);
2037
2038    /* Retain any live IR, but trash the rest. */
2039    reparent_ir(shader->ir, shader->ir);
2040
2041    /* Destroy the symbol table.  Create a new symbol table that contains only
2042     * the variables and functions that still exist in the IR.  The symbol
2043     * table will be used later during linking.
2044     *
2045     * There must NOT be any freed objects still referenced by the symbol
2046     * table.  That could cause the linker to dereference freed memory.
2047     *
2048     * We don't have to worry about types or interface-types here because those
2049     * are fly-weights that are looked up by glsl_type.
2050     */
2051    _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2052                                       shader->symbols);
2053 }
2054
2055 void
2056 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2057                           bool dump_ast, bool dump_hir, bool force_recompile)
2058 {
2059    const char *source = force_recompile && shader->FallbackSource ?
2060       shader->FallbackSource : shader->Source;
2061
2062    if (!force_recompile) {
2063       if (ctx->Cache) {
2064          char buf[41];
2065          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2066                                 shader->sha1);
2067          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2068             /* We've seen this shader before and know it compiles */
2069             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2070                _mesa_sha1_format(buf, shader->sha1);
2071                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2072             }
2073             shader->CompileStatus = COMPILE_SKIPPED;
2074
2075             free((void *)shader->FallbackSource);
2076             shader->FallbackSource = NULL;
2077             return;
2078          }
2079       }
2080    } else {
2081       /* We should only ever end up here if a re-compile has been forced by a
2082        * shader cache miss. In which case we can skip the compile if its
2083        * already be done by a previous fallback or the initial compile call.
2084        */
2085       if (shader->CompileStatus == COMPILE_SUCCESS)
2086          return;
2087
2088       if (shader->CompileStatus == COMPILED_NO_OPTS) {
2089          opt_shader_and_create_symbol_table(ctx,
2090                                             NULL, /* source_symbols */
2091                                             shader);
2092          shader->CompileStatus = COMPILE_SUCCESS;
2093          return;
2094       }
2095    }
2096
2097    struct _mesa_glsl_parse_state *state =
2098       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2099
2100    if (ctx->Const.GenerateTemporaryNames)
2101       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2102                               false, true);
2103
2104    state->error = glcpp_preprocess(state, &source, &state->info_log,
2105                                    add_builtin_defines, state, ctx);
2106
2107    if (!state->error) {
2108      _mesa_glsl_lexer_ctor(state, source);
2109      _mesa_glsl_parse(state);
2110      _mesa_glsl_lexer_dtor(state);
2111      do_late_parsing_checks(state);
2112    }
2113
2114    if (dump_ast) {
2115       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2116          ast->print();
2117       }
2118       printf("\n\n");
2119    }
2120
2121    ralloc_free(shader->ir);
2122    shader->ir = new(shader) exec_list;
2123    if (!state->error && !state->translation_unit.is_empty())
2124       _mesa_ast_to_hir(shader->ir, state);
2125
2126    if (!state->error) {
2127       validate_ir_tree(shader->ir);
2128
2129       /* Print out the unoptimized IR. */
2130       if (dump_hir) {
2131          _mesa_print_ir(stdout, shader->ir, state);
2132       }
2133    }
2134
2135    if (shader->InfoLog)
2136       ralloc_free(shader->InfoLog);
2137
2138    if (!state->error)
2139       set_shader_inout_layout(shader, state);
2140
2141    shader->symbols = new(shader->ir) glsl_symbol_table;
2142    shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2143    shader->InfoLog = state->info_log;
2144    shader->Version = state->language_version;
2145    shader->IsES = state->es_shader;
2146
2147    if (!state->error && !shader->ir->is_empty()) {
2148       assign_subroutine_indexes(state);
2149       lower_subroutine(shader->ir, state);
2150
2151       if (!ctx->Cache || force_recompile)
2152          opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2153       else {
2154          reparent_ir(shader->ir, shader->ir);
2155          shader->CompileStatus = COMPILED_NO_OPTS;
2156       }
2157    }
2158
2159    if (!force_recompile) {
2160       free((void *)shader->FallbackSource);
2161       shader->FallbackSource = NULL;
2162    }
2163
2164    delete state->symbols;
2165    ralloc_free(state);
2166 }
2167
2168 } /* extern "C" */
2169 /**
2170  * Do the set of common optimizations passes
2171  *
2172  * \param ir                          List of instructions to be optimized
2173  * \param linked                      Is the shader linked?  This enables
2174  *                                    optimizations passes that remove code at
2175  *                                    global scope and could cause linking to
2176  *                                    fail.
2177  * \param uniform_locations_assigned  Have locations already been assigned for
2178  *                                    uniforms?  This prevents the declarations
2179  *                                    of unused uniforms from being removed.
2180  *                                    The setting of this flag only matters if
2181  *                                    \c linked is \c true.
2182  * \param options                     The driver's preferred shader options.
2183  * \param native_integers             Selects optimizations that depend on the
2184  *                                    implementations supporting integers
2185  *                                    natively (as opposed to supporting
2186  *                                    integers in floating point registers).
2187  */
2188 bool
2189 do_common_optimization(exec_list *ir, bool linked,
2190                        bool uniform_locations_assigned,
2191                        const struct gl_shader_compiler_options *options,
2192                        bool native_integers)
2193 {
2194    const bool debug = false;
2195    GLboolean progress = GL_FALSE;
2196
2197 #define OPT(PASS, ...) do {                                             \
2198       if (debug) {                                                      \
2199          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2200          const bool opt_progress = PASS(__VA_ARGS__);                   \
2201          progress = opt_progress || progress;                           \
2202          if (opt_progress)                                              \
2203             _mesa_print_ir(stderr, ir, NULL);                           \
2204          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2205                  #PASS, opt_progress ? "made" : "no");                  \
2206       } else {                                                          \
2207          progress = PASS(__VA_ARGS__) || progress;                      \
2208       }                                                                 \
2209    } while (false)
2210
2211    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2212
2213    if (linked) {
2214       OPT(do_function_inlining, ir);
2215       OPT(do_dead_functions, ir);
2216       OPT(do_structure_splitting, ir);
2217    }
2218    propagate_invariance(ir);
2219    OPT(do_if_simplification, ir);
2220    OPT(opt_flatten_nested_if_blocks, ir);
2221    OPT(opt_conditional_discard, ir);
2222    OPT(do_copy_propagation_elements, ir);
2223
2224    if (options->OptimizeForAOS && !linked)
2225       OPT(opt_flip_matrices, ir);
2226
2227    if (linked && options->OptimizeForAOS) {
2228       OPT(do_vectorize, ir);
2229    }
2230
2231    if (linked)
2232       OPT(do_dead_code, ir, uniform_locations_assigned);
2233    else
2234       OPT(do_dead_code_unlinked, ir);
2235    OPT(do_dead_code_local, ir);
2236    OPT(do_tree_grafting, ir);
2237    OPT(do_constant_propagation, ir);
2238    if (linked)
2239       OPT(do_constant_variable, ir);
2240    else
2241       OPT(do_constant_variable_unlinked, ir);
2242    OPT(do_constant_folding, ir);
2243    OPT(do_minmax_prune, ir);
2244    OPT(do_rebalance_tree, ir);
2245    OPT(do_algebraic, ir, native_integers, options);
2246    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2247        options->EmitNoCont, options->EmitNoLoops);
2248    OPT(do_vec_index_to_swizzle, ir);
2249    OPT(lower_vector_insert, ir, false);
2250    OPT(optimize_swizzles, ir);
2251
2252    OPT(optimize_split_arrays, ir, linked);
2253    OPT(optimize_redundant_jumps, ir);
2254
2255    if (options->MaxUnrollIterations) {
2256       loop_state *ls = analyze_loop_variables(ir);
2257       if (ls->loop_found) {
2258          bool loop_progress = unroll_loops(ir, ls, options);
2259          while (loop_progress) {
2260             loop_progress = false;
2261             loop_progress |= do_constant_propagation(ir);
2262             loop_progress |= do_if_simplification(ir);
2263
2264             /* Some drivers only call do_common_optimization() once rather
2265              * than in a loop. So we must call do_lower_jumps() after
2266              * unrolling a loop because for drivers that use LLVM validation
2267              * will fail if a jump is not the last instruction in the block.
2268              * For example the following will fail LLVM validation:
2269              *
2270              *   (loop (
2271              *      ...
2272              *   break
2273              *   (assign  (x) (var_ref v124)  (expression int + (var_ref v124)
2274              *      (constant int (1)) ) )
2275              *   ))
2276              */
2277             loop_progress |= do_lower_jumps(ir, true, true,
2278                                             options->EmitNoMainReturn,
2279                                             options->EmitNoCont,
2280                                             options->EmitNoLoops);
2281          }
2282          progress |= loop_progress;
2283       }
2284       delete ls;
2285    }
2286
2287 #undef OPT
2288
2289    return progress;
2290 }
2291
2292 extern "C" {
2293
2294 /**
2295  * To be called at GL teardown time, this frees compiler datastructures.
2296  *
2297  * After calling this, any previously compiled shaders and shader
2298  * programs would be invalid.  So this should happen at approximately
2299  * program exit.
2300  */
2301 void
2302 _mesa_destroy_shader_compiler(void)
2303 {
2304    _mesa_destroy_shader_compiler_caches();
2305
2306    _mesa_glsl_release_types();
2307 }
2308
2309 /**
2310  * Releases compiler caches to trade off performance for memory.
2311  *
2312  * Intended to be used with glReleaseShaderCompiler().
2313  */
2314 void
2315 _mesa_destroy_shader_compiler_caches(void)
2316 {
2317    _mesa_glsl_release_builtin_functions();
2318 }
2319
2320 }