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_shader_stencil_export),
 703    EXT(AMD_shader_trinary_minmax),
 704    EXT(AMD_vertex_shader_layer),
 705    EXT(AMD_vertex_shader_viewport_index),
 706    EXT(ANDROID_extension_pack_es31a),
 707    EXT(EXT_blend_func_extended),
 708    EXT(EXT_frag_depth),
 709    EXT(EXT_draw_buffers),
 710    EXT(EXT_clip_cull_distance),
 711    EXT(EXT_geometry_point_size),
 712    EXT_AEP(EXT_geometry_shader),
 713    EXT_AEP(EXT_gpu_shader5),
 714    EXT_AEP(EXT_primitive_bounding_box),
 715    EXT(EXT_separate_shader_objects),
 716    EXT(EXT_shader_framebuffer_fetch),
 717    EXT(EXT_shader_framebuffer_fetch_non_coherent),
 718    EXT(EXT_shader_integer_mix),
 719    EXT_AEP(EXT_shader_io_blocks),
 720    EXT(EXT_shader_samples_identical),
 721    EXT(EXT_tessellation_point_size),
 722    EXT_AEP(EXT_tessellation_shader),
 723    EXT(EXT_texture_array),
 724    EXT_AEP(EXT_texture_buffer),
 725    EXT_AEP(EXT_texture_cube_map_array),
 726    EXT(INTEL_conservative_rasterization),
 727    EXT(INTEL_shader_atomic_float_minmax),
 728    EXT(MESA_shader_integer_functions),
 729    EXT(NV_fragment_shader_interlock),
 730    EXT(NV_image_formats),
 731    EXT(NV_shader_atomic_float),
 732 };
 733
 734 #undef EXT
 735
 736
 737 /**
 738  * Determine whether a given extension is compatible with the target,
 739  * API, and extension information in the current parser state.
 740  */
 741 bool _mesa_glsl_extension::compatible_with_state(
 742       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 743 {
 744    return this->available_pred(state->ctx, api, gl_version);
 745 }
 746
 747 /**
 748  * Set the appropriate flags in the parser state to establish the
 749  * given behavior for this extension.
 750  */
 751 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 752                                      ext_behavior behavior) const
 753 {
 754    /* Note: the ->* operator indexes into state by the
 755     * offsets this->enable_flag and this->warn_flag.  See
 756     * _mesa_glsl_extension::supported_flag for more info.
 757     */
 758    state->*(this->enable_flag) = (behavior != extension_disable);
 759    state->*(this->warn_flag)   = (behavior == extension_warn);
 760 }
 761
 762 /**
 763  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 764  * the name is not found, return NULL.
 765  */
 766 static const _mesa_glsl_extension *find_extension(const char *name)
 767 {
 768    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 769       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 770          return &_mesa_glsl_supported_extensions[i];
 771       }
 772    }
 773    return NULL;
 774 }
 775
 776 bool
 777 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 778                              const char *behavior_string, YYLTYPE *behavior_locp,
 779                              _mesa_glsl_parse_state *state)
 780 {
 781    uint8_t gl_version = state->ctx->Extensions.Version;
 782    gl_api api = state->ctx->API;
 783    ext_behavior behavior;
 784    if (strcmp(behavior_string, "warn") == 0) {
 785       behavior = extension_warn;
 786    } else if (strcmp(behavior_string, "require") == 0) {
 787       behavior = extension_require;
 788    } else if (strcmp(behavior_string, "enable") == 0) {
 789       behavior = extension_enable;
 790    } else if (strcmp(behavior_string, "disable") == 0) {
 791       behavior = extension_disable;
 792    } else {
 793       _mesa_glsl_error(behavior_locp, state,
 794                        "unknown extension behavior `%s'",
 795                        behavior_string);
 796       return false;
 797    }
 798
 799    /* If we're in a desktop context but with an ES shader, use an ES API enum
 800     * to verify extension availability.
 801     */
 802    if (state->es_shader && api != API_OPENGLES2)
 803       api = API_OPENGLES2;
 804    /* Use the language-version derived GL version to extension checks, unless
 805     * we're using meta, which sets the version to the max.
 806     */
 807    if (gl_version != 0xff)
 808       gl_version = state->gl_version;
 809
 810    if (strcmp(name, "all") == 0) {
 811       if ((behavior == extension_enable) || (behavior == extension_require)) {
 812          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 813                           (behavior == extension_enable)
 814                           ? "enable" : "require");
 815          return false;
 816       } else {
 817          for (unsigned i = 0;
 818               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 819             const _mesa_glsl_extension *extension
 820                = &_mesa_glsl_supported_extensions[i];
 821             if (extension->compatible_with_state(state, api, gl_version)) {
 822                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 823             }
 824          }
 825       }
 826    } else {
 827       const _mesa_glsl_extension *extension = find_extension(name);
 828       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 829          extension->set_flags(state, behavior);
 830          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 831             for (unsigned i = 0;
 832                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 833                const _mesa_glsl_extension *extension =
 834                   &_mesa_glsl_supported_extensions[i];
 835
 836                if (!extension->aep)
 837                   continue;
 838                /* AEP should not be enabled if all of the sub-extensions can't
 839                 * also be enabled. This is not the proper layer to do such
 840                 * error-checking though.
 841                 */
 842                assert(extension->compatible_with_state(state, api, gl_version));
 843                extension->set_flags(state, behavior);
 844             }
 845          }
 846       } else {
 847          static const char fmt[] = "extension `%s' unsupported in %s shader";
 848
 849          if (behavior == extension_require) {
 850             _mesa_glsl_error(name_locp, state, fmt,
 851                              name, _mesa_shader_stage_to_string(state->stage));
 852             return false;
 853          } else {
 854             _mesa_glsl_warning(name_locp, state, fmt,
 855                                name, _mesa_shader_stage_to_string(state->stage));
 856          }
 857       }
 858    }
 859
 860    return true;
 861 }
 862
 863
 864 /**
 865  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 866  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 867  * (process_array_constructor, et al) sufficient information to do type
 868  * checking.
 869  *
 870  * Operates on assignments involving an aggregate initializer. E.g.,
 871  *
 872  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 873  *
 874  * or more ridiculously,
 875  *
 876  * struct S {
 877  *     vec4 v[2];
 878  * };
 879  *
 880  * struct {
 881  *     S a[2], b;
 882  *     int c;
 883  * } aggregate = {
 884  *     {
 885  *         {
 886  *             {
 887  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 888  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 889  *             } // a[0].v
 890  *         }, // a[0]
 891  *         {
 892  *             {
 893  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 894  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 895  *             } // a[1].v
 896  *         } // a[1]
 897  *     }, // a
 898  *     {
 899  *         {
 900  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 901  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 902  *         } // b.v
 903  *     }, // b
 904  *     4 // c
 905  * };
 906  *
 907  * This pass is necessary because the right-hand side of <type> e = { ... }
 908  * doesn't contain sufficient information to determine if the types match.
 909  */
 910 void
 911 _mesa_ast_set_aggregate_type(const glsl_type *type,
 912                              ast_expression *expr)
 913 {
 914    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 915    ai->constructor_type = type;
 916
 917    /* If the aggregate is an array, recursively set its elements' types. */
 918    if (type->is_array()) {
 919       /* Each array element has the type type->fields.array.
 920        *
 921        * E.g., if <type> if struct S[2] we want to set each element's type to
 922        * struct S.
 923        */
 924       for (exec_node *expr_node = ai->expressions.get_head_raw();
 925            !expr_node->is_tail_sentinel();
 926            expr_node = expr_node->next) {
 927          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 928                                                link);
 929
 930          if (expr->oper == ast_aggregate)
 931             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 932       }
 933
 934    /* If the aggregate is a struct, recursively set its fields' types. */
 935    } else if (type->is_record()) {
 936       exec_node *expr_node = ai->expressions.get_head_raw();
 937
 938       /* Iterate through the struct's fields. */
 939       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 940            i++, expr_node = expr_node->next) {
 941          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 942                                                link);
 943
 944          if (expr->oper == ast_aggregate) {
 945             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 946          }
 947       }
 948    /* If the aggregate is a matrix, set its columns' types. */
 949    } else if (type->is_matrix()) {
 950       for (exec_node *expr_node = ai->expressions.get_head_raw();
 951            !expr_node->is_tail_sentinel();
 952            expr_node = expr_node->next) {
 953          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 954                                                link);
 955
 956          if (expr->oper == ast_aggregate)
 957             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 958       }
 959    }
 960 }
 961
 962 void
 963 _mesa_ast_process_interface_block(YYLTYPE *locp,
 964                                   _mesa_glsl_parse_state *state,
 965                                   ast_interface_block *const block,
 966                                   const struct ast_type_qualifier &q)
 967 {
 968    if (q.flags.q.buffer) {
 969       if (!state->has_shader_storage_buffer_objects()) {
 970          _mesa_glsl_error(locp, state,
 971                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 972                           "required for defining shader storage blocks");
 973       } else if (state->ARB_shader_storage_buffer_object_warn) {
 974          _mesa_glsl_warning(locp, state,
 975                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 976                             "required for defining shader storage blocks");
 977       }
 978    } else if (q.flags.q.uniform) {
 979       if (!state->has_uniform_buffer_objects()) {
 980          _mesa_glsl_error(locp, state,
 981                           "#version 140 / GL_ARB_uniform_buffer_object "
 982                           "required for defining uniform blocks");
 983       } else if (state->ARB_uniform_buffer_object_warn) {
 984          _mesa_glsl_warning(locp, state,
 985                             "#version 140 / GL_ARB_uniform_buffer_object "
 986                             "required for defining uniform blocks");
 987       }
 988    } else {
 989       if (!state->has_shader_io_blocks()) {
 990          if (state->es_shader) {
 991             _mesa_glsl_error(locp, state,
 992                              "GL_OES_shader_io_blocks or #version 320 "
 993                              "required for using interface blocks");
 994          } else {
 995             _mesa_glsl_error(locp, state,
 996                              "#version 150 required for using "
 997                              "interface blocks");
 998          }
 999       }
1000    }
1001
1002    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
1003     * "It is illegal to have an input block in a vertex shader
1004     *  or an output block in a fragment shader"
1005     */
1006    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
1007       _mesa_glsl_error(locp, state,
1008                        "`in' interface block is not allowed for "
1009                        "a vertex shader");
1010    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1011       _mesa_glsl_error(locp, state,
1012                        "`out' interface block is not allowed for "
1013                        "a fragment shader");
1014    }
1015
1016    /* Since block arrays require names, and both features are added in
1017     * the same language versions, we don't have to explicitly
1018     * version-check both things.
1019     */
1020    if (block->instance_name != NULL) {
1021       state->check_version(150, 300, locp, "interface blocks with "
1022                            "an instance name are not allowed");
1023    }
1024
1025    ast_type_qualifier::bitset_t interface_type_mask;
1026    struct ast_type_qualifier temp_type_qualifier;
1027
1028    /* Get a bitmask containing only the in/out/uniform/buffer
1029     * flags, allowing us to ignore other irrelevant flags like
1030     * interpolation qualifiers.
1031     */
1032    temp_type_qualifier.flags.i = 0;
1033    temp_type_qualifier.flags.q.uniform = true;
1034    temp_type_qualifier.flags.q.in = true;
1035    temp_type_qualifier.flags.q.out = true;
1036    temp_type_qualifier.flags.q.buffer = true;
1037    temp_type_qualifier.flags.q.patch = true;
1038    interface_type_mask = temp_type_qualifier.flags.i;
1039
1040    /* Get the block's interface qualifier.  The interface_qualifier
1041     * production rule guarantees that only one bit will be set (and
1042     * it will be in/out/uniform).
1043     */
1044    ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1045
1046    block->default_layout.flags.i |= block_interface_qualifier;
1047
1048    if (state->stage == MESA_SHADER_GEOMETRY &&
1049        state->has_explicit_attrib_stream() &&
1050        block->default_layout.flags.q.out) {
1051       /* Assign global layout's stream value. */
1052       block->default_layout.flags.q.stream = 1;
1053       block->default_layout.flags.q.explicit_stream = 0;
1054       block->default_layout.stream = state->out_qualifier->stream;
1055    }
1056
1057    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1058       /* Assign global layout's xfb_buffer value. */
1059       block->default_layout.flags.q.xfb_buffer = 1;
1060       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1061       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1062    }
1063
1064    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1065       ast_type_qualifier& qualifier = member->type->qualifier;
1066       if ((qualifier.flags.i & interface_type_mask) == 0) {
1067          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1068           * "If no optional qualifier is used in a member declaration, the
1069           *  qualifier of the variable is just in, out, or uniform as declared
1070           *  by interface-qualifier."
1071           */
1072          qualifier.flags.i |= block_interface_qualifier;
1073       } else if ((qualifier.flags.i & interface_type_mask) !=
1074                  block_interface_qualifier) {
1075          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1076           * "If optional qualifiers are used, they can include interpolation
1077           *  and storage qualifiers and they must declare an input, output,
1078           *  or uniform variable consistent with the interface qualifier of
1079           *  the block."
1080           */
1081          _mesa_glsl_error(locp, state,
1082                           "uniform/in/out qualifier on "
1083                           "interface block member does not match "
1084                           "the interface block");
1085       }
1086
1087       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1088          _mesa_glsl_error(locp, state,
1089                           "invariant qualifiers can be used only "
1090                           "in interface block members for shader "
1091                           "inputs or outputs");
1092    }
1093 }
1094
1095 static void
1096 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1097 {
1098    if (q->is_subroutine_decl())
1099       printf("subroutine ");
1100
1101    if (q->subroutine_list) {
1102       printf("subroutine (");
1103       q->subroutine_list->print();
1104       printf(")");
1105    }
1106
1107    if (q->flags.q.constant)
1108       printf("const ");
1109
1110    if (q->flags.q.invariant)
1111       printf("invariant ");
1112
1113    if (q->flags.q.attribute)
1114       printf("attribute ");
1115
1116    if (q->flags.q.varying)
1117       printf("varying ");
1118
1119    if (q->flags.q.in && q->flags.q.out)
1120       printf("inout ");
1121    else {
1122       if (q->flags.q.in)
1123          printf("in ");
1124
1125       if (q->flags.q.out)
1126          printf("out ");
1127    }
1128
1129    if (q->flags.q.centroid)
1130       printf("centroid ");
1131    if (q->flags.q.sample)
1132       printf("sample ");
1133    if (q->flags.q.patch)
1134       printf("patch ");
1135    if (q->flags.q.uniform)
1136       printf("uniform ");
1137    if (q->flags.q.buffer)
1138       printf("buffer ");
1139    if (q->flags.q.smooth)
1140       printf("smooth ");
1141    if (q->flags.q.flat)
1142       printf("flat ");
1143    if (q->flags.q.noperspective)
1144       printf("noperspective ");
1145 }
1146
1147
1148 void
1149 ast_node::print(void) const
1150 {
1151    printf("unhandled node ");
1152 }
1153
1154
1155 ast_node::ast_node(void)
1156 {
1157    this->location.source = 0;
1158    this->location.first_line = 0;
1159    this->location.first_column = 0;
1160    this->location.last_line = 0;
1161    this->location.last_column = 0;
1162 }
1163
1164
1165 static void
1166 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1167 {
1168    if (array_specifier)
1169       array_specifier->print();
1170 }
1171
1172
1173 void
1174 ast_compound_statement::print(void) const
1175 {
1176    printf("{\n");
1177
1178    foreach_list_typed(ast_node, ast, link, &this->statements) {
1179       ast->print();
1180    }
1181
1182    printf("}\n");
1183 }
1184
1185
1186 ast_compound_statement::ast_compound_statement(int new_scope,
1187                                                ast_node *statements)
1188 {
1189    this->new_scope = new_scope;
1190
1191    if (statements != NULL) {
1192       this->statements.push_degenerate_list_at_head(&statements->link);
1193    }
1194 }
1195
1196
1197 void
1198 ast_expression::print(void) const
1199 {
1200    switch (oper) {
1201    case ast_assign:
1202    case ast_mul_assign:
1203    case ast_div_assign:
1204    case ast_mod_assign:
1205    case ast_add_assign:
1206    case ast_sub_assign:
1207    case ast_ls_assign:
1208    case ast_rs_assign:
1209    case ast_and_assign:
1210    case ast_xor_assign:
1211    case ast_or_assign:
1212       subexpressions[0]->print();
1213       printf("%s ", operator_string(oper));
1214       subexpressions[1]->print();
1215       break;
1216
1217    case ast_field_selection:
1218       subexpressions[0]->print();
1219       printf(". %s ", primary_expression.identifier);
1220       break;
1221
1222    case ast_plus:
1223    case ast_neg:
1224    case ast_bit_not:
1225    case ast_logic_not:
1226    case ast_pre_inc:
1227    case ast_pre_dec:
1228       printf("%s ", operator_string(oper));
1229       subexpressions[0]->print();
1230       break;
1231
1232    case ast_post_inc:
1233    case ast_post_dec:
1234       subexpressions[0]->print();
1235       printf("%s ", operator_string(oper));
1236       break;
1237
1238    case ast_conditional:
1239       subexpressions[0]->print();
1240       printf("? ");
1241       subexpressions[1]->print();
1242       printf(": ");
1243       subexpressions[2]->print();
1244       break;
1245
1246    case ast_array_index:
1247       subexpressions[0]->print();
1248       printf("[ ");
1249       subexpressions[1]->print();
1250       printf("] ");
1251       break;
1252
1253    case ast_function_call: {
1254       subexpressions[0]->print();
1255       printf("( ");
1256
1257       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1258          if (&ast->link != this->expressions.get_head())
1259             printf(", ");
1260
1261          ast->print();
1262       }
1263
1264       printf(") ");
1265       break;
1266    }
1267
1268    case ast_identifier:
1269       printf("%s ", primary_expression.identifier);
1270       break;
1271
1272    case ast_int_constant:
1273       printf("%d ", primary_expression.int_constant);
1274       break;
1275
1276    case ast_uint_constant:
1277       printf("%u ", primary_expression.uint_constant);
1278       break;
1279
1280    case ast_float_constant:
1281       printf("%f ", primary_expression.float_constant);
1282       break;
1283
1284    case ast_double_constant:
1285       printf("%f ", primary_expression.double_constant);
1286       break;
1287
1288    case ast_int64_constant:
1289       printf("%" PRId64 " ", primary_expression.int64_constant);
1290       break;
1291
1292    case ast_uint64_constant:
1293       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1294       break;
1295
1296    case ast_bool_constant:
1297       printf("%s ",
1298              primary_expression.bool_constant
1299              ? "true" : "false");
1300       break;
1301
1302    case ast_sequence: {
1303       printf("( ");
1304       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1305          if (&ast->link != this->expressions.get_head())
1306             printf(", ");
1307
1308          ast->print();
1309       }
1310       printf(") ");
1311       break;
1312    }
1313
1314    case ast_aggregate: {
1315       printf("{ ");
1316       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1317          if (&ast->link != this->expressions.get_head())
1318             printf(", ");
1319
1320          ast->print();
1321       }
1322       printf("} ");
1323       break;
1324    }
1325
1326    default:
1327       assert(0);
1328       break;
1329    }
1330 }
1331
1332 ast_expression::ast_expression(int oper,
1333                                ast_expression *ex0,
1334                                ast_expression *ex1,
1335                                ast_expression *ex2) :
1336    primary_expression()
1337 {
1338    this->oper = ast_operators(oper);
1339    this->subexpressions[0] = ex0;
1340    this->subexpressions[1] = ex1;
1341    this->subexpressions[2] = ex2;
1342    this->non_lvalue_description = NULL;
1343    this->is_lhs = false;
1344 }
1345
1346
1347 void
1348 ast_expression_statement::print(void) const
1349 {
1350    if (expression)
1351       expression->print();
1352
1353    printf("; ");
1354 }
1355
1356
1357 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1358    expression(ex)
1359 {
1360    /* empty */
1361 }
1362
1363
1364 void
1365 ast_function::print(void) const
1366 {
1367    return_type->print();
1368    printf(" %s (", identifier);
1369
1370    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1371       ast->print();
1372    }
1373
1374    printf(")");
1375 }
1376
1377
1378 ast_function::ast_function(void)
1379    : return_type(NULL), identifier(NULL), is_definition(false),
1380      signature(NULL)
1381 {
1382    /* empty */
1383 }
1384
1385
1386 void
1387 ast_fully_specified_type::print(void) const
1388 {
1389    _mesa_ast_type_qualifier_print(& qualifier);
1390    specifier->print();
1391 }
1392
1393
1394 void
1395 ast_parameter_declarator::print(void) const
1396 {
1397    type->print();
1398    if (identifier)
1399       printf("%s ", identifier);
1400    ast_opt_array_dimensions_print(array_specifier);
1401 }
1402
1403
1404 void
1405 ast_function_definition::print(void) const
1406 {
1407    prototype->print();
1408    body->print();
1409 }
1410
1411
1412 void
1413 ast_declaration::print(void) const
1414 {
1415    printf("%s ", identifier);
1416    ast_opt_array_dimensions_print(array_specifier);
1417
1418    if (initializer) {
1419       printf("= ");
1420       initializer->print();
1421    }
1422 }
1423
1424
1425 ast_declaration::ast_declaration(const char *identifier,
1426                                  ast_array_specifier *array_specifier,
1427                                  ast_expression *initializer)
1428 {
1429    this->identifier = identifier;
1430    this->array_specifier = array_specifier;
1431    this->initializer = initializer;
1432 }
1433
1434
1435 void
1436 ast_declarator_list::print(void) const
1437 {
1438    assert(type || invariant);
1439
1440    if (type)
1441       type->print();
1442    else if (invariant)
1443       printf("invariant ");
1444    else
1445       printf("precise ");
1446
1447    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1448       if (&ast->link != this->declarations.get_head())
1449          printf(", ");
1450
1451       ast->print();
1452    }
1453
1454    printf("; ");
1455 }
1456
1457
1458 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1459 {
1460    this->type = type;
1461    this->invariant = false;
1462    this->precise = false;
1463 }
1464
1465 void
1466 ast_jump_statement::print(void) const
1467 {
1468    switch (mode) {
1469    case ast_continue:
1470       printf("continue; ");
1471       break;
1472    case ast_break:
1473       printf("break; ");
1474       break;
1475    case ast_return:
1476       printf("return ");
1477       if (opt_return_value)
1478          opt_return_value->print();
1479
1480       printf("; ");
1481       break;
1482    case ast_discard:
1483       printf("discard; ");
1484       break;
1485    }
1486 }
1487
1488
1489 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1490    : opt_return_value(NULL)
1491 {
1492    this->mode = ast_jump_modes(mode);
1493
1494    if (mode == ast_return)
1495       opt_return_value = return_value;
1496 }
1497
1498
1499 void
1500 ast_selection_statement::print(void) const
1501 {
1502    printf("if ( ");
1503    condition->print();
1504    printf(") ");
1505
1506    then_statement->print();
1507
1508    if (else_statement) {
1509       printf("else ");
1510       else_statement->print();
1511    }
1512 }
1513
1514
1515 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1516                                                  ast_node *then_statement,
1517                                                  ast_node *else_statement)
1518 {
1519    this->condition = condition;
1520    this->then_statement = then_statement;
1521    this->else_statement = else_statement;
1522 }
1523
1524
1525 void
1526 ast_switch_statement::print(void) const
1527 {
1528    printf("switch ( ");
1529    test_expression->print();
1530    printf(") ");
1531
1532    body->print();
1533 }
1534
1535
1536 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1537                                            ast_node *body)
1538 {
1539    this->test_expression = test_expression;
1540    this->body = body;
1541 }
1542
1543
1544 void
1545 ast_switch_body::print(void) const
1546 {
1547    printf("{\n");
1548    if (stmts != NULL) {
1549       stmts->print();
1550    }
1551    printf("}\n");
1552 }
1553
1554
1555 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1556 {
1557    this->stmts = stmts;
1558 }
1559
1560
1561 void ast_case_label::print(void) const
1562 {
1563    if (test_value != NULL) {
1564       printf("case ");
1565       test_value->print();
1566       printf(": ");
1567    } else {
1568       printf("default: ");
1569    }
1570 }
1571
1572
1573 ast_case_label::ast_case_label(ast_expression *test_value)
1574 {
1575    this->test_value = test_value;
1576 }
1577
1578
1579 void ast_case_label_list::print(void) const
1580 {
1581    foreach_list_typed(ast_node, ast, link, & this->labels) {
1582       ast->print();
1583    }
1584    printf("\n");
1585 }
1586
1587
1588 ast_case_label_list::ast_case_label_list(void)
1589 {
1590 }
1591
1592
1593 void ast_case_statement::print(void) const
1594 {
1595    labels->print();
1596    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1597       ast->print();
1598       printf("\n");
1599    }
1600 }
1601
1602
1603 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1604 {
1605    this->labels = labels;
1606 }
1607
1608
1609 void ast_case_statement_list::print(void) const
1610 {
1611    foreach_list_typed(ast_node, ast, link, & this->cases) {
1612       ast->print();
1613    }
1614 }
1615
1616
1617 ast_case_statement_list::ast_case_statement_list(void)
1618 {
1619 }
1620
1621
1622 void
1623 ast_iteration_statement::print(void) const
1624 {
1625    switch (mode) {
1626    case ast_for:
1627       printf("for( ");
1628       if (init_statement)
1629          init_statement->print();
1630       printf("; ");
1631
1632       if (condition)
1633          condition->print();
1634       printf("; ");
1635
1636       if (rest_expression)
1637          rest_expression->print();
1638       printf(") ");
1639
1640       body->print();
1641       break;
1642
1643    case ast_while:
1644       printf("while ( ");
1645       if (condition)
1646          condition->print();
1647       printf(") ");
1648       body->print();
1649       break;
1650
1651    case ast_do_while:
1652       printf("do ");
1653       body->print();
1654       printf("while ( ");
1655       if (condition)
1656          condition->print();
1657       printf("); ");
1658       break;
1659    }
1660 }
1661
1662
1663 ast_iteration_statement::ast_iteration_statement(int mode,
1664                                                  ast_node *init,
1665                                                  ast_node *condition,
1666                                                  ast_expression *rest_expression,
1667                                                  ast_node *body)
1668 {
1669    this->mode = ast_iteration_modes(mode);
1670    this->init_statement = init;
1671    this->condition = condition;
1672    this->rest_expression = rest_expression;
1673    this->body = body;
1674 }
1675
1676
1677 void
1678 ast_struct_specifier::print(void) const
1679 {
1680    printf("struct %s { ", name);
1681    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1682       ast->print();
1683    }
1684    printf("} ");
1685 }
1686
1687
1688 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1689                                            ast_declarator_list *declarator_list)
1690    : name(identifier), layout(NULL), declarations(), is_declaration(true),
1691      type(NULL)
1692 {
1693    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1694 }
1695
1696 void ast_subroutine_list::print(void) const
1697 {
1698    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1699       if (&ast->link != this->declarations.get_head())
1700          printf(", ");
1701       ast->print();
1702    }
1703 }
1704
1705 static void
1706 set_shader_inout_layout(struct gl_shader *shader,
1707                      struct _mesa_glsl_parse_state *state)
1708 {
1709    /* Should have been prevented by the parser. */
1710    if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1711        shader->Stage == MESA_SHADER_VERTEX) {
1712       assert(!state->in_qualifier->flags.i);
1713    } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1714               shader->Stage != MESA_SHADER_TESS_EVAL) {
1715       assert(!state->in_qualifier->flags.i);
1716    }
1717
1718    if (shader->Stage != MESA_SHADER_COMPUTE) {
1719       /* Should have been prevented by the parser. */
1720       assert(!state->cs_input_local_size_specified);
1721       assert(!state->cs_input_local_size_variable_specified);
1722    }
1723
1724    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1725       /* Should have been prevented by the parser. */
1726       assert(!state->fs_uses_gl_fragcoord);
1727       assert(!state->fs_redeclares_gl_fragcoord);
1728       assert(!state->fs_pixel_center_integer);
1729       assert(!state->fs_origin_upper_left);
1730       assert(!state->fs_early_fragment_tests);
1731       assert(!state->fs_inner_coverage);
1732       assert(!state->fs_post_depth_coverage);
1733       assert(!state->fs_pixel_interlock_ordered);
1734       assert(!state->fs_pixel_interlock_unordered);
1735       assert(!state->fs_sample_interlock_ordered);
1736       assert(!state->fs_sample_interlock_unordered);
1737    }
1738
1739    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1740       if (state->out_qualifier->out_xfb_stride[i]) {
1741          unsigned xfb_stride;
1742          if (state->out_qualifier->out_xfb_stride[i]->
1743                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1744                 true)) {
1745             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1746          }
1747       }
1748    }
1749
1750    switch (shader->Stage) {
1751    case MESA_SHADER_TESS_CTRL:
1752       shader->info.TessCtrl.VerticesOut = 0;
1753       if (state->tcs_output_vertices_specified) {
1754          unsigned vertices;
1755          if (state->out_qualifier->vertices->
1756                process_qualifier_constant(state, "vertices", &vertices,
1757                                           false)) {
1758
1759             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1760             if (vertices > state->Const.MaxPatchVertices) {
1761                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1762                                 "GL_MAX_PATCH_VERTICES", vertices);
1763             }
1764             shader->info.TessCtrl.VerticesOut = vertices;
1765          }
1766       }
1767       break;
1768    case MESA_SHADER_TESS_EVAL:
1769       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1770       if (state->in_qualifier->flags.q.prim_type)
1771          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1772
1773       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1774       if (state->in_qualifier->flags.q.vertex_spacing)
1775          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1776
1777       shader->info.TessEval.VertexOrder = 0;
1778       if (state->in_qualifier->flags.q.ordering)
1779          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1780
1781       shader->info.TessEval.PointMode = -1;
1782       if (state->in_qualifier->flags.q.point_mode)
1783          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1784       break;
1785    case MESA_SHADER_GEOMETRY:
1786       shader->info.Geom.VerticesOut = -1;
1787       if (state->out_qualifier->flags.q.max_vertices) {
1788          unsigned qual_max_vertices;
1789          if (state->out_qualifier->max_vertices->
1790                process_qualifier_constant(state, "max_vertices",
1791                                           &qual_max_vertices, true)) {
1792
1793             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1794                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1795                _mesa_glsl_error(&loc, state,
1796                                 "maximum output vertices (%d) exceeds "
1797                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1798                                 qual_max_vertices);
1799             }
1800             shader->info.Geom.VerticesOut = qual_max_vertices;
1801          }
1802       }
1803
1804       if (state->gs_input_prim_type_specified) {
1805          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1806       } else {
1807          shader->info.Geom.InputType = PRIM_UNKNOWN;
1808       }
1809
1810       if (state->out_qualifier->flags.q.prim_type) {
1811          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1812       } else {
1813          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1814       }
1815
1816       shader->info.Geom.Invocations = 0;
1817       if (state->in_qualifier->flags.q.invocations) {
1818          unsigned invocations;
1819          if (state->in_qualifier->invocations->
1820                process_qualifier_constant(state, "invocations",
1821                                           &invocations, false)) {
1822
1823             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1824             if (invocations > state->Const.MaxGeometryShaderInvocations) {
1825                _mesa_glsl_error(&loc, state,
1826                                 "invocations (%d) exceeds "
1827                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1828                                 invocations);
1829             }
1830             shader->info.Geom.Invocations = invocations;
1831          }
1832       }
1833       break;
1834
1835    case MESA_SHADER_COMPUTE:
1836       if (state->cs_input_local_size_specified) {
1837          for (int i = 0; i < 3; i++)
1838             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1839       } else {
1840          for (int i = 0; i < 3; i++)
1841             shader->info.Comp.LocalSize[i] = 0;
1842       }
1843
1844       shader->info.Comp.LocalSizeVariable =
1845          state->cs_input_local_size_variable_specified;
1846       break;
1847
1848    case MESA_SHADER_FRAGMENT:
1849       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1850       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1851       shader->pixel_center_integer = state->fs_pixel_center_integer;
1852       shader->origin_upper_left = state->fs_origin_upper_left;
1853       shader->ARB_fragment_coord_conventions_enable =
1854          state->ARB_fragment_coord_conventions_enable;
1855       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1856       shader->InnerCoverage = state->fs_inner_coverage;
1857       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1858       shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
1859       shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
1860       shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
1861       shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
1862       shader->BlendSupport = state->fs_blend_support;
1863       break;
1864
1865    default:
1866       /* Nothing to do. */
1867       break;
1868    }
1869
1870    shader->bindless_sampler = state->bindless_sampler_specified;
1871    shader->bindless_image = state->bindless_image_specified;
1872    shader->bound_sampler = state->bound_sampler_specified;
1873    shader->bound_image = state->bound_image_specified;
1874 }
1875
1876 /* src can be NULL if only the symbols found in the exec_list should be
1877  * copied
1878  */
1879 void
1880 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1881                                    struct glsl_symbol_table *src,
1882                                    struct glsl_symbol_table *dest)
1883 {
1884    foreach_in_list (ir_instruction, ir, shader_ir) {
1885       switch (ir->ir_type) {
1886       case ir_type_function:
1887          dest->add_function((ir_function *) ir);
1888          break;
1889       case ir_type_variable: {
1890          ir_variable *const var = (ir_variable *) ir;
1891
1892          if (var->data.mode != ir_var_temporary)
1893             dest->add_variable(var);
1894          break;
1895       }
1896       default:
1897          break;
1898       }
1899    }
1900
1901    if (src != NULL) {
1902       /* Explicitly copy the gl_PerVertex interface definitions because these
1903        * are needed to check they are the same during the interstage link.
1904        * They can’t necessarily be found via the exec_list because the members
1905        * might not be referenced. The GL spec still requires that they match
1906        * in that case.
1907        */
1908       const glsl_type *iface =
1909          src->get_interface("gl_PerVertex", ir_var_shader_in);
1910       if (iface)
1911          dest->add_interface(iface->name, iface, ir_var_shader_in);
1912
1913       iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1914       if (iface)
1915          dest->add_interface(iface->name, iface, ir_var_shader_out);
1916    }
1917 }
1918
1919 extern "C" {
1920
1921 static void
1922 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1923 {
1924    int j, k;
1925    int index = 0;
1926
1927    for (j = 0; j < state->num_subroutines; j++) {
1928       while (state->subroutines[j]->subroutine_index == -1) {
1929          for (k = 0; k < state->num_subroutines; k++) {
1930             if (state->subroutines[k]->subroutine_index == index)
1931                break;
1932             else if (k == state->num_subroutines - 1) {
1933                state->subroutines[j]->subroutine_index = index;
1934             }
1935          }
1936          index++;
1937       }
1938    }
1939 }
1940
1941 static void
1942 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1943                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1944                     struct glcpp_parser *data,
1945                     unsigned version,
1946                     bool es)
1947 {
1948    unsigned gl_version = state->ctx->Extensions.Version;
1949    gl_api api = state->ctx->API;
1950
1951    if (gl_version != 0xff) {
1952       unsigned i;
1953       for (i = 0; i < state->num_supported_versions; i++) {
1954          if (state->supported_versions[i].ver == version &&
1955              state->supported_versions[i].es == es) {
1956             gl_version = state->supported_versions[i].gl_ver;
1957             break;
1958          }
1959       }
1960
1961       if (i == state->num_supported_versions)
1962          return;
1963    }
1964
1965    if (es)
1966       api = API_OPENGLES2;
1967
1968    for (unsigned i = 0;
1969         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
1970       const _mesa_glsl_extension *extension
1971          = &_mesa_glsl_supported_extensions[i];
1972       if (extension->compatible_with_state(state, api, gl_version)) {
1973          add_builtin_define(data, extension->name, 1);
1974       }
1975    }
1976 }
1977
1978 /* Implements parsing checks that we can't do during parsing */
1979 static void
1980 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
1981 {
1982    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
1983       YYLTYPE loc;
1984       memset(&loc, 0, sizeof(loc));
1985       _mesa_glsl_error(&loc, state, "Compute shaders require "
1986                        "GLSL 4.30 or GLSL ES 3.10");
1987    }
1988 }
1989
1990 static void
1991 opt_shader_and_create_symbol_table(struct gl_context *ctx,
1992                                    struct glsl_symbol_table *source_symbols,
1993                                    struct gl_shader *shader)
1994 {
1995    assert(shader->CompileStatus != COMPILE_FAILURE &&
1996           !shader->ir->is_empty());
1997
1998    struct gl_shader_compiler_options *options =
1999       &ctx->Const.ShaderCompilerOptions[shader->Stage];
2000
2001    /* Do some optimization at compile time to reduce shader IR size
2002     * and reduce later work if the same shader is linked multiple times
2003     */
2004    if (ctx->Const.GLSLOptimizeConservatively) {
2005       /* Run it just once. */
2006       do_common_optimization(shader->ir, false, false, options,
2007                              ctx->Const.NativeIntegers);
2008    } else {
2009       /* Repeat it until it stops making changes. */
2010       while (do_common_optimization(shader->ir, false, false, options,
2011                                     ctx->Const.NativeIntegers))
2012          ;
2013    }
2014
2015    validate_ir_tree(shader->ir);
2016
2017    enum ir_variable_mode other;
2018    switch (shader->Stage) {
2019    case MESA_SHADER_VERTEX:
2020       other = ir_var_shader_in;
2021       break;
2022    case MESA_SHADER_FRAGMENT:
2023       other = ir_var_shader_out;
2024       break;
2025    default:
2026       /* Something invalid to ensure optimize_dead_builtin_uniforms
2027        * doesn't remove anything other than uniforms or constants.
2028        */
2029       other = ir_var_mode_count;
2030       break;
2031    }
2032
2033    optimize_dead_builtin_variables(shader->ir, other);
2034
2035    validate_ir_tree(shader->ir);
2036
2037    /* Retain any live IR, but trash the rest. */
2038    reparent_ir(shader->ir, shader->ir);
2039
2040    /* Destroy the symbol table.  Create a new symbol table that contains only
2041     * the variables and functions that still exist in the IR.  The symbol
2042     * table will be used later during linking.
2043     *
2044     * There must NOT be any freed objects still referenced by the symbol
2045     * table.  That could cause the linker to dereference freed memory.
2046     *
2047     * We don't have to worry about types or interface-types here because those
2048     * are fly-weights that are looked up by glsl_type.
2049     */
2050    _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2051                                       shader->symbols);
2052 }
2053
2054 void
2055 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2056                           bool dump_ast, bool dump_hir, bool force_recompile)
2057 {
2058    const char *source = force_recompile && shader->FallbackSource ?
2059       shader->FallbackSource : shader->Source;
2060
2061    if (!force_recompile) {
2062       if (ctx->Cache) {
2063          char buf[41];
2064          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2065                                 shader->sha1);
2066          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2067             /* We've seen this shader before and know it compiles */
2068             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2069                _mesa_sha1_format(buf, shader->sha1);
2070                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2071             }
2072             shader->CompileStatus = COMPILE_SKIPPED;
2073
2074             free((void *)shader->FallbackSource);
2075             shader->FallbackSource = NULL;
2076             return;
2077          }
2078       }
2079    } else {
2080       /* We should only ever end up here if a re-compile has been forced by a
2081        * shader cache miss. In which case we can skip the compile if its
2082        * already be done by a previous fallback or the initial compile call.
2083        */
2084       if (shader->CompileStatus == COMPILE_SUCCESS)
2085          return;
2086
2087       if (shader->CompileStatus == COMPILED_NO_OPTS) {
2088          opt_shader_and_create_symbol_table(ctx,
2089                                             NULL, /* source_symbols */
2090                                             shader);
2091          shader->CompileStatus = COMPILE_SUCCESS;
2092          return;
2093       }
2094    }
2095
2096    struct _mesa_glsl_parse_state *state =
2097       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2098
2099    if (ctx->Const.GenerateTemporaryNames)
2100       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2101                               false, true);
2102
2103    state->error = glcpp_preprocess(state, &source, &state->info_log,
2104                                    add_builtin_defines, state, ctx);
2105
2106    if (!state->error) {
2107      _mesa_glsl_lexer_ctor(state, source);
2108      _mesa_glsl_parse(state);
2109      _mesa_glsl_lexer_dtor(state);
2110      do_late_parsing_checks(state);
2111    }
2112
2113    if (dump_ast) {
2114       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2115          ast->print();
2116       }
2117       printf("\n\n");
2118    }
2119
2120    ralloc_free(shader->ir);
2121    shader->ir = new(shader) exec_list;
2122    if (!state->error && !state->translation_unit.is_empty())
2123       _mesa_ast_to_hir(shader->ir, state);
2124
2125    if (!state->error) {
2126       validate_ir_tree(shader->ir);
2127
2128       /* Print out the unoptimized IR. */
2129       if (dump_hir) {
2130          _mesa_print_ir(stdout, shader->ir, state);
2131       }
2132    }
2133
2134    if (shader->InfoLog)
2135       ralloc_free(shader->InfoLog);
2136
2137    if (!state->error)
2138       set_shader_inout_layout(shader, state);
2139
2140    shader->symbols = new(shader->ir) glsl_symbol_table;
2141    shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2142    shader->InfoLog = state->info_log;
2143    shader->Version = state->language_version;
2144    shader->IsES = state->es_shader;
2145
2146    if (!state->error && !shader->ir->is_empty()) {
2147       assign_subroutine_indexes(state);
2148       lower_subroutine(shader->ir, state);
2149
2150       if (!ctx->Cache || force_recompile)
2151          opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2152       else {
2153          reparent_ir(shader->ir, shader->ir);
2154          shader->CompileStatus = COMPILED_NO_OPTS;
2155       }
2156    }
2157
2158    if (!force_recompile) {
2159       free((void *)shader->FallbackSource);
2160       shader->FallbackSource = NULL;
2161    }
2162
2163    delete state->symbols;
2164    ralloc_free(state);
2165 }
2166
2167 } /* extern "C" */
2168 /**
2169  * Do the set of common optimizations passes
2170  *
2171  * \param ir                          List of instructions to be optimized
2172  * \param linked                      Is the shader linked?  This enables
2173  *                                    optimizations passes that remove code at
2174  *                                    global scope and could cause linking to
2175  *                                    fail.
2176  * \param uniform_locations_assigned  Have locations already been assigned for
2177  *                                    uniforms?  This prevents the declarations
2178  *                                    of unused uniforms from being removed.
2179  *                                    The setting of this flag only matters if
2180  *                                    \c linked is \c true.
2181  * \param options                     The driver's preferred shader options.
2182  * \param native_integers             Selects optimizations that depend on the
2183  *                                    implementations supporting integers
2184  *                                    natively (as opposed to supporting
2185  *                                    integers in floating point registers).
2186  */
2187 bool
2188 do_common_optimization(exec_list *ir, bool linked,
2189                        bool uniform_locations_assigned,
2190                        const struct gl_shader_compiler_options *options,
2191                        bool native_integers)
2192 {
2193    const bool debug = false;
2194    GLboolean progress = GL_FALSE;
2195
2196 #define OPT(PASS, ...) do {                                             \
2197       if (debug) {                                                      \
2198          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2199          const bool opt_progress = PASS(__VA_ARGS__);                   \
2200          progress = opt_progress || progress;                           \
2201          if (opt_progress)                                              \
2202             _mesa_print_ir(stderr, ir, NULL);                           \
2203          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2204                  #PASS, opt_progress ? "made" : "no");                  \
2205       } else {                                                          \
2206          progress = PASS(__VA_ARGS__) || progress;                      \
2207       }                                                                 \
2208    } while (false)
2209
2210    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2211
2212    if (linked) {
2213       OPT(do_function_inlining, ir);
2214       OPT(do_dead_functions, ir);
2215       OPT(do_structure_splitting, ir);
2216    }
2217    propagate_invariance(ir);
2218    OPT(do_if_simplification, ir);
2219    OPT(opt_flatten_nested_if_blocks, ir);
2220    OPT(opt_conditional_discard, ir);
2221    OPT(do_copy_propagation_elements, ir);
2222
2223    if (options->OptimizeForAOS && !linked)
2224       OPT(opt_flip_matrices, ir);
2225
2226    if (linked && options->OptimizeForAOS) {
2227       OPT(do_vectorize, ir);
2228    }
2229
2230    if (linked)
2231       OPT(do_dead_code, ir, uniform_locations_assigned);
2232    else
2233       OPT(do_dead_code_unlinked, ir);
2234    OPT(do_dead_code_local, ir);
2235    OPT(do_tree_grafting, ir);
2236    OPT(do_constant_propagation, ir);
2237    if (linked)
2238       OPT(do_constant_variable, ir);
2239    else
2240       OPT(do_constant_variable_unlinked, ir);
2241    OPT(do_constant_folding, ir);
2242    OPT(do_minmax_prune, ir);
2243    OPT(do_rebalance_tree, ir);
2244    OPT(do_algebraic, ir, native_integers, options);
2245    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2246        options->EmitNoCont, options->EmitNoLoops);
2247    OPT(do_vec_index_to_swizzle, ir);
2248    OPT(lower_vector_insert, ir, false);
2249    OPT(optimize_swizzles, ir);
2250
2251    OPT(optimize_split_arrays, ir, linked);
2252    OPT(optimize_redundant_jumps, ir);
2253
2254    if (options->MaxUnrollIterations) {
2255       loop_state *ls = analyze_loop_variables(ir);
2256       if (ls->loop_found) {
2257          bool loop_progress = unroll_loops(ir, ls, options);
2258          while (loop_progress) {
2259             loop_progress = false;
2260             loop_progress |= do_constant_propagation(ir);
2261             loop_progress |= do_if_simplification(ir);
2262
2263             /* Some drivers only call do_common_optimization() once rather
2264              * than in a loop. So we must call do_lower_jumps() after
2265              * unrolling a loop because for drivers that use LLVM validation
2266              * will fail if a jump is not the last instruction in the block.
2267              * For example the following will fail LLVM validation:
2268              *
2269              *   (loop (
2270              *      ...
2271              *   break
2272              *   (assign  (x) (var_ref v124)  (expression int + (var_ref v124)
2273              *      (constant int (1)) ) )
2274              *   ))
2275              */
2276             loop_progress |= do_lower_jumps(ir, true, true,
2277                                             options->EmitNoMainReturn,
2278                                             options->EmitNoCont,
2279                                             options->EmitNoLoops);
2280          }
2281          progress |= loop_progress;
2282       }
2283       delete ls;
2284    }
2285
2286 #undef OPT
2287
2288    return progress;
2289 }
2290
2291 extern "C" {
2292
2293 /**
2294  * To be called at GL teardown time, this frees compiler datastructures.
2295  *
2296  * After calling this, any previously compiled shaders and shader
2297  * programs would be invalid.  So this should happen at approximately
2298  * program exit.
2299  */
2300 void
2301 _mesa_destroy_shader_compiler(void)
2302 {
2303    _mesa_destroy_shader_compiler_caches();
2304
2305    _mesa_glsl_release_types();
2306 }
2307
2308 /**
2309  * Releases compiler caches to trade off performance for memory.
2310  *
2311  * Intended to be used with glReleaseShaderCompiler().
2312  */
2313 void
2314 _mesa_destroy_shader_compiler_caches(void)
2315 {
2316    _mesa_glsl_release_builtin_functions();
2317 }
2318
2319 }