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