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(), warnings_enabled(true)
  66 {
  67    assert(stage < MESA_SHADER_STAGES);
  68    this->stage = stage;
  69
  70    this->scanner = NULL;
  71    this->translation_unit.make_empty();
  72    this->symbols = new(mem_ctx) glsl_symbol_table;
  73
  74    this->linalloc = linear_alloc_parent(this, 0);
  75
  76    this->info_log = ralloc_strdup(mem_ctx, "");
  77    this->error = false;
  78    this->loop_nesting_ast = NULL;
  79
  80    this->uses_builtin_functions = false;
  81
  82    /* Set default language version and extensions */
  83    this->language_version = 110;
  84    this->forced_language_version = ctx->Const.ForceGLSLVersion;
  85    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    this->allow_layout_qualifier_on_function_parameter =
 315       ctx->Const.AllowLayoutQualifiersOnFunctionParameters;
 316
 317    this->cs_input_local_size_variable_specified = false;
 318
 319    /* ARB_bindless_texture */
 320    this->bindless_sampler_specified = false;
 321    this->bindless_image_specified = false;
 322    this->bound_sampler_specified = false;
 323    this->bound_image_specified = false;
 324 }
 325
 326 /**
 327  * Determine whether the current GLSL version is sufficiently high to support
 328  * a certain feature, and generate an error message if it isn't.
 329  *
 330  * \param required_glsl_version and \c required_glsl_es_version are
 331  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 332  *
 333  * \param locp is the parser location where the error should be reported.
 334  *
 335  * \param fmt (and additional arguments) constitute a printf-style error
 336  * message to report if the version check fails.  Information about the
 337  * current and required GLSL versions will be appended.  So, for example, if
 338  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 339  * "foo unsupported") is called, the error message will be "foo unsupported in
 340  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 341  */
 342 bool
 343 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 344                                       unsigned required_glsl_es_version,
 345                                       YYLTYPE *locp, const char *fmt, ...)
 346 {
 347    if (this->is_version(required_glsl_version, required_glsl_es_version))
 348       return true;
 349
 350    va_list args;
 351    va_start(args, fmt);
 352    char *problem = ralloc_vasprintf(this, fmt, args);
 353    va_end(args);
 354    const char *glsl_version_string
 355       = glsl_compute_version_string(this, false, required_glsl_version);
 356    const char *glsl_es_version_string
 357       = glsl_compute_version_string(this, true, required_glsl_es_version);
 358    const char *requirement_string = "";
 359    if (required_glsl_version && required_glsl_es_version) {
 360       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 361                                            glsl_version_string,
 362                                            glsl_es_version_string);
 363    } else if (required_glsl_version) {
 364       requirement_string = ralloc_asprintf(this, " (%s required)",
 365                                            glsl_version_string);
 366    } else if (required_glsl_es_version) {
 367       requirement_string = ralloc_asprintf(this, " (%s required)",
 368                                            glsl_es_version_string);
 369    }
 370    _mesa_glsl_error(locp, this, "%s in %s%s",
 371                     problem, this->get_version_string(),
 372                     requirement_string);
 373
 374    return false;
 375 }
 376
 377 /**
 378  * Process a GLSL #version directive.
 379  *
 380  * \param version is the integer that follows the #version token.
 381  *
 382  * \param ident is a string identifier that follows the integer, if any is
 383  * present.  Otherwise NULL.
 384  */
 385 void
 386 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 387                                                   const char *ident)
 388 {
 389    bool es_token_present = false;
 390    bool compat_token_present = false;
 391    if (ident) {
 392       if (strcmp(ident, "es") == 0) {
 393          es_token_present = true;
 394       } else if (version >= 150) {
 395          if (strcmp(ident, "core") == 0) {
 396             /* Accept the token.  There's no need to record that this is
 397              * a core profile shader since that's the only profile we support.
 398              */
 399          } else if (strcmp(ident, "compatibility") == 0) {
 400             compat_token_present = true;
 401
 402             if (this->ctx->API != API_OPENGL_COMPAT) {
 403                _mesa_glsl_error(locp, this,
 404                                 "the compatibility profile is not supported");
 405             }
 406          } else {
 407             _mesa_glsl_error(locp, this,
 408                              "\"%s\" is not a valid shading language profile; "
 409                              "if present, it must be \"core\"", ident);
 410          }
 411       } else {
 412          _mesa_glsl_error(locp, this,
 413                           "illegal text following version number");
 414       }
 415    }
 416
 417    this->es_shader = es_token_present;
 418    if (version == 100) {
 419       if (es_token_present) {
 420          _mesa_glsl_error(locp, this,
 421                           "GLSL 1.00 ES should be selected using "
 422                           "`#version 100'");
 423       } else {
 424          this->es_shader = true;
 425       }
 426    }
 427
 428    if (this->es_shader) {
 429       this->ARB_texture_rectangle_enable = false;
 430    }
 431
 432    if (this->forced_language_version)
 433       this->language_version = this->forced_language_version;
 434    else
 435       this->language_version = version;
 436
 437    this->compat_shader = compat_token_present ||
 438                          (this->ctx->API == API_OPENGL_COMPAT &&
 439                           this->language_version == 140) ||
 440                          (!this->es_shader && this->language_version < 140);
 441
 442    bool supported = false;
 443    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 444       if (this->supported_versions[i].ver == this->language_version
 445           && this->supported_versions[i].es == this->es_shader) {
 446          this->gl_version = this->supported_versions[i].gl_ver;
 447          supported = true;
 448          break;
 449       }
 450    }
 451
 452    if (!supported) {
 453       _mesa_glsl_error(locp, this, "%s is not supported. "
 454                        "Supported versions are: %s",
 455                        this->get_version_string(),
 456                        this->supported_version_string);
 457
 458       /* On exit, the language_version must be set to a valid value.
 459        * Later calls to _mesa_glsl_initialize_types will misbehave if
 460        * the version is invalid.
 461        */
 462       switch (this->ctx->API) {
 463       case API_OPENGL_COMPAT:
 464       case API_OPENGL_CORE:
 465          this->language_version = this->ctx->Const.GLSLVersion;
 466          break;
 467
 468       case API_OPENGLES:
 469          assert(!"Should not get here.");
 470          /* FALLTHROUGH */
 471
 472       case API_OPENGLES2:
 473          this->language_version = 100;
 474          break;
 475       }
 476    }
 477 }
 478
 479
 480 /* This helper function will append the given message to the shader's
 481    info log and report it via GL_ARB_debug_output. Per that extension,
 482    'type' is one of the enum values classifying the message, and
 483    'id' is the implementation-defined ID of the given message. */
 484 static void
 485 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 486                GLenum type, const char *fmt, va_list ap)
 487 {
 488    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 489    GLuint msg_id = 0;
 490
 491    assert(state->info_log != NULL);
 492
 493    /* Get the offset that the new message will be written to. */
 494    int msg_offset = strlen(state->info_log);
 495
 496    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 497                                             locp->source,
 498                                             locp->first_line,
 499                                             locp->first_column,
 500                                             error ? "error" : "warning");
 501    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 502
 503    const char *const msg = &state->info_log[msg_offset];
 504    struct gl_context *ctx = state->ctx;
 505
 506    /* Report the error via GL_ARB_debug_output. */
 507    _mesa_shader_debug(ctx, type, &msg_id, msg);
 508
 509    ralloc_strcat(&state->info_log, "\n");
 510 }
 511
 512 void
 513 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 514                  const char *fmt, ...)
 515 {
 516    va_list ap;
 517
 518    state->error = true;
 519
 520    va_start(ap, fmt);
 521    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 522    va_end(ap);
 523 }
 524
 525
 526 void
 527 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 528                    const char *fmt, ...)
 529 {
 530    if (state->warnings_enabled) {
 531       va_list ap;
 532
 533       va_start(ap, fmt);
 534       _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 535       va_end(ap);
 536    }
 537 }
 538
 539
 540 /**
 541  * Enum representing the possible behaviors that can be specified in
 542  * an #extension directive.
 543  */
 544 enum ext_behavior {
 545    extension_disable,
 546    extension_enable,
 547    extension_require,
 548    extension_warn
 549 };
 550
 551 /**
 552  * Element type for _mesa_glsl_supported_extensions
 553  */
 554 struct _mesa_glsl_extension {
 555    /**
 556     * Name of the extension when referred to in a GLSL extension
 557     * statement
 558     */
 559    const char *name;
 560
 561    /**
 562     * Whether this extension is a part of AEP
 563     */
 564    bool aep;
 565
 566    /**
 567     * Predicate that checks whether the relevant extension is available for
 568     * this context.
 569     */
 570    bool (*available_pred)(const struct gl_context *,
 571                           gl_api api, uint8_t version);
 572
 573    /**
 574     * Flag in the _mesa_glsl_parse_state struct that should be set
 575     * when this extension is enabled.
 576     *
 577     * See note in _mesa_glsl_extension::supported_flag about "pointer
 578     * to member" types.
 579     */
 580    bool _mesa_glsl_parse_state::* enable_flag;
 581
 582    /**
 583     * Flag in the _mesa_glsl_parse_state struct that should be set
 584     * when the shader requests "warn" behavior for this extension.
 585     *
 586     * See note in _mesa_glsl_extension::supported_flag about "pointer
 587     * to member" types.
 588     */
 589    bool _mesa_glsl_parse_state::* warn_flag;
 590
 591
 592    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 593                               gl_api api, uint8_t gl_version) const;
 594    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 595 };
 596
 597 /** Checks if the context supports a user-facing extension */
 598 #define EXT(name_str, driver_cap, ...) \
 599 static MAYBE_UNUSED bool \
 600 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 601 { \
 602    return ctx->Extensions.driver_cap && (version >= \
 603           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 604 }
 605 #include "main/extensions_table.h"
 606 #undef EXT
 607
 608 #define EXT(NAME)                                           \
 609    { "GL_" #NAME, false, has_##NAME,                        \
 610      &_mesa_glsl_parse_state::NAME##_enable,                \
 611      &_mesa_glsl_parse_state::NAME##_warn }
 612
 613 #define EXT_AEP(NAME)                                       \
 614    { "GL_" #NAME, true, has_##NAME,                         \
 615      &_mesa_glsl_parse_state::NAME##_enable,                \
 616      &_mesa_glsl_parse_state::NAME##_warn }
 617
 618 /**
 619  * Table of extensions that can be enabled/disabled within a shader,
 620  * and the conditions under which they are supported.
 621  */
 622 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 623    /* ARB extensions go here, sorted alphabetically.
 624     */
 625    EXT(ARB_ES3_1_compatibility),
 626    EXT(ARB_ES3_2_compatibility),
 627    EXT(ARB_arrays_of_arrays),
 628    EXT(ARB_bindless_texture),
 629    EXT(ARB_compatibility),
 630    EXT(ARB_compute_shader),
 631    EXT(ARB_compute_variable_group_size),
 632    EXT(ARB_conservative_depth),
 633    EXT(ARB_cull_distance),
 634    EXT(ARB_derivative_control),
 635    EXT(ARB_draw_buffers),
 636    EXT(ARB_draw_instanced),
 637    EXT(ARB_enhanced_layouts),
 638    EXT(ARB_explicit_attrib_location),
 639    EXT(ARB_explicit_uniform_location),
 640    EXT(ARB_fragment_coord_conventions),
 641    EXT(ARB_fragment_layer_viewport),
 642    EXT(ARB_fragment_shader_interlock),
 643    EXT(ARB_gpu_shader5),
 644    EXT(ARB_gpu_shader_fp64),
 645    EXT(ARB_gpu_shader_int64),
 646    EXT(ARB_post_depth_coverage),
 647    EXT(ARB_sample_shading),
 648    EXT(ARB_separate_shader_objects),
 649    EXT(ARB_shader_atomic_counter_ops),
 650    EXT(ARB_shader_atomic_counters),
 651    EXT(ARB_shader_ballot),
 652    EXT(ARB_shader_bit_encoding),
 653    EXT(ARB_shader_clock),
 654    EXT(ARB_shader_draw_parameters),
 655    EXT(ARB_shader_group_vote),
 656    EXT(ARB_shader_image_load_store),
 657    EXT(ARB_shader_image_size),
 658    EXT(ARB_shader_precision),
 659    EXT(ARB_shader_stencil_export),
 660    EXT(ARB_shader_storage_buffer_object),
 661    EXT(ARB_shader_subroutine),
 662    EXT(ARB_shader_texture_image_samples),
 663    EXT(ARB_shader_texture_lod),
 664    EXT(ARB_shader_viewport_layer_array),
 665    EXT(ARB_shading_language_420pack),
 666    EXT(ARB_shading_language_packing),
 667    EXT(ARB_tessellation_shader),
 668    EXT(ARB_texture_cube_map_array),
 669    EXT(ARB_texture_gather),
 670    EXT(ARB_texture_multisample),
 671    EXT(ARB_texture_query_levels),
 672    EXT(ARB_texture_query_lod),
 673    EXT(ARB_texture_rectangle),
 674    EXT(ARB_uniform_buffer_object),
 675    EXT(ARB_vertex_attrib_64bit),
 676    EXT(ARB_viewport_array),
 677
 678    /* KHR extensions go here, sorted alphabetically.
 679     */
 680    EXT_AEP(KHR_blend_equation_advanced),
 681
 682    /* OES extensions go here, sorted alphabetically.
 683     */
 684    EXT(OES_EGL_image_external),
 685    EXT(OES_EGL_image_external_essl3),
 686    EXT(OES_geometry_point_size),
 687    EXT(OES_geometry_shader),
 688    EXT(OES_gpu_shader5),
 689    EXT(OES_primitive_bounding_box),
 690    EXT_AEP(OES_sample_variables),
 691    EXT_AEP(OES_shader_image_atomic),
 692    EXT(OES_shader_io_blocks),
 693    EXT_AEP(OES_shader_multisample_interpolation),
 694    EXT(OES_standard_derivatives),
 695    EXT(OES_tessellation_point_size),
 696    EXT(OES_tessellation_shader),
 697    EXT(OES_texture_3D),
 698    EXT(OES_texture_buffer),
 699    EXT(OES_texture_cube_map_array),
 700    EXT_AEP(OES_texture_storage_multisample_2d_array),
 701    EXT(OES_viewport_array),
 702
 703    /* All other extensions go here, sorted alphabetically.
 704     */
 705    EXT(AMD_conservative_depth),
 706    EXT(AMD_gpu_shader_int64),
 707    EXT(AMD_shader_stencil_export),
 708    EXT(AMD_shader_trinary_minmax),
 709    EXT(AMD_texture_texture4),
 710    EXT(AMD_vertex_shader_layer),
 711    EXT(AMD_vertex_shader_viewport_index),
 712    EXT(ANDROID_extension_pack_es31a),
 713    EXT(EXT_blend_func_extended),
 714    EXT(EXT_frag_depth),
 715    EXT(EXT_draw_buffers),
 716    EXT(EXT_clip_cull_distance),
 717    EXT(EXT_geometry_point_size),
 718    EXT_AEP(EXT_geometry_shader),
 719    EXT_AEP(EXT_gpu_shader5),
 720    EXT_AEP(EXT_primitive_bounding_box),
 721    EXT(EXT_separate_shader_objects),
 722    EXT(EXT_shader_framebuffer_fetch),
 723    EXT(EXT_shader_framebuffer_fetch_non_coherent),
 724    EXT(EXT_shader_implicit_conversions),
 725    EXT(EXT_shader_integer_mix),
 726    EXT_AEP(EXT_shader_io_blocks),
 727    EXT(EXT_shader_samples_identical),
 728    EXT(EXT_tessellation_point_size),
 729    EXT_AEP(EXT_tessellation_shader),
 730    EXT(EXT_texture_array),
 731    EXT_AEP(EXT_texture_buffer),
 732    EXT_AEP(EXT_texture_cube_map_array),
 733    EXT(EXT_texture_query_lod),
 734    EXT(INTEL_conservative_rasterization),
 735    EXT(INTEL_shader_atomic_float_minmax),
 736    EXT(MESA_shader_integer_functions),
 737    EXT(NV_compute_shader_derivatives),
 738    EXT(NV_fragment_shader_interlock),
 739    EXT(NV_image_formats),
 740    EXT(NV_shader_atomic_float),
 741 };
 742
 743 #undef EXT
 744
 745
 746 /**
 747  * Determine whether a given extension is compatible with the target,
 748  * API, and extension information in the current parser state.
 749  */
 750 bool _mesa_glsl_extension::compatible_with_state(
 751       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 752 {
 753    return this->available_pred(state->ctx, api, gl_version);
 754 }
 755
 756 /**
 757  * Set the appropriate flags in the parser state to establish the
 758  * given behavior for this extension.
 759  */
 760 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 761                                      ext_behavior behavior) const
 762 {
 763    /* Note: the ->* operator indexes into state by the
 764     * offsets this->enable_flag and this->warn_flag.  See
 765     * _mesa_glsl_extension::supported_flag for more info.
 766     */
 767    state->*(this->enable_flag) = (behavior != extension_disable);
 768    state->*(this->warn_flag)   = (behavior == extension_warn);
 769 }
 770
 771 /**
 772  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 773  * the name is not found, return NULL.
 774  */
 775 static const _mesa_glsl_extension *find_extension(const char *name)
 776 {
 777    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 778       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 779          return &_mesa_glsl_supported_extensions[i];
 780       }
 781    }
 782    return NULL;
 783 }
 784
 785 bool
 786 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 787                              const char *behavior_string, YYLTYPE *behavior_locp,
 788                              _mesa_glsl_parse_state *state)
 789 {
 790    uint8_t gl_version = state->ctx->Extensions.Version;
 791    gl_api api = state->ctx->API;
 792    ext_behavior behavior;
 793    if (strcmp(behavior_string, "warn") == 0) {
 794       behavior = extension_warn;
 795    } else if (strcmp(behavior_string, "require") == 0) {
 796       behavior = extension_require;
 797    } else if (strcmp(behavior_string, "enable") == 0) {
 798       behavior = extension_enable;
 799    } else if (strcmp(behavior_string, "disable") == 0) {
 800       behavior = extension_disable;
 801    } else {
 802       _mesa_glsl_error(behavior_locp, state,
 803                        "unknown extension behavior `%s'",
 804                        behavior_string);
 805       return false;
 806    }
 807
 808    /* If we're in a desktop context but with an ES shader, use an ES API enum
 809     * to verify extension availability.
 810     */
 811    if (state->es_shader && api != API_OPENGLES2)
 812       api = API_OPENGLES2;
 813    /* Use the language-version derived GL version to extension checks, unless
 814     * we're using meta, which sets the version to the max.
 815     */
 816    if (gl_version != 0xff)
 817       gl_version = state->gl_version;
 818
 819    if (strcmp(name, "all") == 0) {
 820       if ((behavior == extension_enable) || (behavior == extension_require)) {
 821          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 822                           (behavior == extension_enable)
 823                           ? "enable" : "require");
 824          return false;
 825       } else {
 826          for (unsigned i = 0;
 827               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 828             const _mesa_glsl_extension *extension
 829                = &_mesa_glsl_supported_extensions[i];
 830             if (extension->compatible_with_state(state, api, gl_version)) {
 831                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 832             }
 833          }
 834       }
 835    } else {
 836       const _mesa_glsl_extension *extension = find_extension(name);
 837       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 838          extension->set_flags(state, behavior);
 839          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 840             for (unsigned i = 0;
 841                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 842                const _mesa_glsl_extension *extension =
 843                   &_mesa_glsl_supported_extensions[i];
 844
 845                if (!extension->aep)
 846                   continue;
 847                /* AEP should not be enabled if all of the sub-extensions can't
 848                 * also be enabled. This is not the proper layer to do such
 849                 * error-checking though.
 850                 */
 851                assert(extension->compatible_with_state(state, api, gl_version));
 852                extension->set_flags(state, behavior);
 853             }
 854          }
 855       } else {
 856          static const char fmt[] = "extension `%s' unsupported in %s shader";
 857
 858          if (behavior == extension_require) {
 859             _mesa_glsl_error(name_locp, state, fmt,
 860                              name, _mesa_shader_stage_to_string(state->stage));
 861             return false;
 862          } else {
 863             _mesa_glsl_warning(name_locp, state, fmt,
 864                                name, _mesa_shader_stage_to_string(state->stage));
 865          }
 866       }
 867    }
 868
 869    return true;
 870 }
 871
 872
 873 /**
 874  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 875  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 876  * (process_array_constructor, et al) sufficient information to do type
 877  * checking.
 878  *
 879  * Operates on assignments involving an aggregate initializer. E.g.,
 880  *
 881  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 882  *
 883  * or more ridiculously,
 884  *
 885  * struct S {
 886  *     vec4 v[2];
 887  * };
 888  *
 889  * struct {
 890  *     S a[2], b;
 891  *     int c;
 892  * } aggregate = {
 893  *     {
 894  *         {
 895  *             {
 896  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 897  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 898  *             } // a[0].v
 899  *         }, // a[0]
 900  *         {
 901  *             {
 902  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 903  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 904  *             } // a[1].v
 905  *         } // a[1]
 906  *     }, // a
 907  *     {
 908  *         {
 909  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 910  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 911  *         } // b.v
 912  *     }, // b
 913  *     4 // c
 914  * };
 915  *
 916  * This pass is necessary because the right-hand side of <type> e = { ... }
 917  * doesn't contain sufficient information to determine if the types match.
 918  */
 919 void
 920 _mesa_ast_set_aggregate_type(const glsl_type *type,
 921                              ast_expression *expr)
 922 {
 923    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 924    ai->constructor_type = type;
 925
 926    /* If the aggregate is an array, recursively set its elements' types. */
 927    if (type->is_array()) {
 928       /* Each array element has the type type->fields.array.
 929        *
 930        * E.g., if <type> if struct S[2] we want to set each element's type to
 931        * struct S.
 932        */
 933       for (exec_node *expr_node = ai->expressions.get_head_raw();
 934            !expr_node->is_tail_sentinel();
 935            expr_node = expr_node->next) {
 936          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 937                                                link);
 938
 939          if (expr->oper == ast_aggregate)
 940             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 941       }
 942
 943    /* If the aggregate is a struct, recursively set its fields' types. */
 944    } else if (type->is_struct()) {
 945       exec_node *expr_node = ai->expressions.get_head_raw();
 946
 947       /* Iterate through the struct's fields. */
 948       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 949            i++, expr_node = expr_node->next) {
 950          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 951                                                link);
 952
 953          if (expr->oper == ast_aggregate) {
 954             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 955          }
 956       }
 957    /* If the aggregate is a matrix, set its columns' types. */
 958    } else if (type->is_matrix()) {
 959       for (exec_node *expr_node = ai->expressions.get_head_raw();
 960            !expr_node->is_tail_sentinel();
 961            expr_node = expr_node->next) {
 962          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 963                                                link);
 964
 965          if (expr->oper == ast_aggregate)
 966             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 967       }
 968    }
 969 }
 970
 971 void
 972 _mesa_ast_process_interface_block(YYLTYPE *locp,
 973                                   _mesa_glsl_parse_state *state,
 974                                   ast_interface_block *const block,
 975                                   const struct ast_type_qualifier &q)
 976 {
 977    if (q.flags.q.buffer) {
 978       if (!state->has_shader_storage_buffer_objects()) {
 979          _mesa_glsl_error(locp, state,
 980                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 981                           "required for defining shader storage blocks");
 982       } else if (state->ARB_shader_storage_buffer_object_warn) {
 983          _mesa_glsl_warning(locp, state,
 984                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 985                             "required for defining shader storage blocks");
 986       }
 987    } else if (q.flags.q.uniform) {
 988       if (!state->has_uniform_buffer_objects()) {
 989          _mesa_glsl_error(locp, state,
 990                           "#version 140 / GL_ARB_uniform_buffer_object "
 991                           "required for defining uniform blocks");
 992       } else if (state->ARB_uniform_buffer_object_warn) {
 993          _mesa_glsl_warning(locp, state,
 994                             "#version 140 / GL_ARB_uniform_buffer_object "
 995                             "required for defining uniform blocks");
 996       }
 997    } else {
 998       if (!state->has_shader_io_blocks()) {
 999          if (state->es_shader) {
1000             _mesa_glsl_error(locp, state,
1001                              "GL_OES_shader_io_blocks or #version 320 "
1002                              "required for using interface blocks");
1003          } else {
1004             _mesa_glsl_error(locp, state,
1005                              "#version 150 required for using "
1006                              "interface blocks");
1007          }
1008       }
1009    }
1010
1011    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
1012     * "It is illegal to have an input block in a vertex shader
1013     *  or an output block in a fragment shader"
1014     */
1015    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
1016       _mesa_glsl_error(locp, state,
1017                        "`in' interface block is not allowed for "
1018                        "a vertex shader");
1019    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1020       _mesa_glsl_error(locp, state,
1021                        "`out' interface block is not allowed for "
1022                        "a fragment shader");
1023    }
1024
1025    /* Since block arrays require names, and both features are added in
1026     * the same language versions, we don't have to explicitly
1027     * version-check both things.
1028     */
1029    if (block->instance_name != NULL) {
1030       state->check_version(150, 300, locp, "interface blocks with "
1031                            "an instance name are not allowed");
1032    }
1033
1034    ast_type_qualifier::bitset_t interface_type_mask;
1035    struct ast_type_qualifier temp_type_qualifier;
1036
1037    /* Get a bitmask containing only the in/out/uniform/buffer
1038     * flags, allowing us to ignore other irrelevant flags like
1039     * interpolation qualifiers.
1040     */
1041    temp_type_qualifier.flags.i = 0;
1042    temp_type_qualifier.flags.q.uniform = true;
1043    temp_type_qualifier.flags.q.in = true;
1044    temp_type_qualifier.flags.q.out = true;
1045    temp_type_qualifier.flags.q.buffer = true;
1046    temp_type_qualifier.flags.q.patch = true;
1047    interface_type_mask = temp_type_qualifier.flags.i;
1048
1049    /* Get the block's interface qualifier.  The interface_qualifier
1050     * production rule guarantees that only one bit will be set (and
1051     * it will be in/out/uniform).
1052     */
1053    ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1054
1055    block->default_layout.flags.i |= block_interface_qualifier;
1056
1057    if (state->stage == MESA_SHADER_GEOMETRY &&
1058        state->has_explicit_attrib_stream() &&
1059        block->default_layout.flags.q.out) {
1060       /* Assign global layout's stream value. */
1061       block->default_layout.flags.q.stream = 1;
1062       block->default_layout.flags.q.explicit_stream = 0;
1063       block->default_layout.stream = state->out_qualifier->stream;
1064    }
1065
1066    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1067       /* Assign global layout's xfb_buffer value. */
1068       block->default_layout.flags.q.xfb_buffer = 1;
1069       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1070       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1071    }
1072
1073    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1074       ast_type_qualifier& qualifier = member->type->qualifier;
1075       if ((qualifier.flags.i & interface_type_mask) == 0) {
1076          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1077           * "If no optional qualifier is used in a member declaration, the
1078           *  qualifier of the variable is just in, out, or uniform as declared
1079           *  by interface-qualifier."
1080           */
1081          qualifier.flags.i |= block_interface_qualifier;
1082       } else if ((qualifier.flags.i & interface_type_mask) !=
1083                  block_interface_qualifier) {
1084          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1085           * "If optional qualifiers are used, they can include interpolation
1086           *  and storage qualifiers and they must declare an input, output,
1087           *  or uniform variable consistent with the interface qualifier of
1088           *  the block."
1089           */
1090          _mesa_glsl_error(locp, state,
1091                           "uniform/in/out qualifier on "
1092                           "interface block member does not match "
1093                           "the interface block");
1094       }
1095
1096       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1097          _mesa_glsl_error(locp, state,
1098                           "invariant qualifiers can be used only "
1099                           "in interface block members for shader "
1100                           "inputs or outputs");
1101    }
1102 }
1103
1104 static void
1105 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1106 {
1107    if (q->is_subroutine_decl())
1108       printf("subroutine ");
1109
1110    if (q->subroutine_list) {
1111       printf("subroutine (");
1112       q->subroutine_list->print();
1113       printf(")");
1114    }
1115
1116    if (q->flags.q.constant)
1117       printf("const ");
1118
1119    if (q->flags.q.invariant)
1120       printf("invariant ");
1121
1122    if (q->flags.q.attribute)
1123       printf("attribute ");
1124
1125    if (q->flags.q.varying)
1126       printf("varying ");
1127
1128    if (q->flags.q.in && q->flags.q.out)
1129       printf("inout ");
1130    else {
1131       if (q->flags.q.in)
1132          printf("in ");
1133
1134       if (q->flags.q.out)
1135          printf("out ");
1136    }
1137
1138    if (q->flags.q.centroid)
1139       printf("centroid ");
1140    if (q->flags.q.sample)
1141       printf("sample ");
1142    if (q->flags.q.patch)
1143       printf("patch ");
1144    if (q->flags.q.uniform)
1145       printf("uniform ");
1146    if (q->flags.q.buffer)
1147       printf("buffer ");
1148    if (q->flags.q.smooth)
1149       printf("smooth ");
1150    if (q->flags.q.flat)
1151       printf("flat ");
1152    if (q->flags.q.noperspective)
1153       printf("noperspective ");
1154 }
1155
1156
1157 void
1158 ast_node::print(void) const
1159 {
1160    printf("unhandled node ");
1161 }
1162
1163
1164 ast_node::ast_node(void)
1165 {
1166    this->location.source = 0;
1167    this->location.first_line = 0;
1168    this->location.first_column = 0;
1169    this->location.last_line = 0;
1170    this->location.last_column = 0;
1171 }
1172
1173
1174 static void
1175 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1176 {
1177    if (array_specifier)
1178       array_specifier->print();
1179 }
1180
1181
1182 void
1183 ast_compound_statement::print(void) const
1184 {
1185    printf("{\n");
1186
1187    foreach_list_typed(ast_node, ast, link, &this->statements) {
1188       ast->print();
1189    }
1190
1191    printf("}\n");
1192 }
1193
1194
1195 ast_compound_statement::ast_compound_statement(int new_scope,
1196                                                ast_node *statements)
1197 {
1198    this->new_scope = new_scope;
1199
1200    if (statements != NULL) {
1201       this->statements.push_degenerate_list_at_head(&statements->link);
1202    }
1203 }
1204
1205
1206 void
1207 ast_expression::print(void) const
1208 {
1209    switch (oper) {
1210    case ast_assign:
1211    case ast_mul_assign:
1212    case ast_div_assign:
1213    case ast_mod_assign:
1214    case ast_add_assign:
1215    case ast_sub_assign:
1216    case ast_ls_assign:
1217    case ast_rs_assign:
1218    case ast_and_assign:
1219    case ast_xor_assign:
1220    case ast_or_assign:
1221       subexpressions[0]->print();
1222       printf("%s ", operator_string(oper));
1223       subexpressions[1]->print();
1224       break;
1225
1226    case ast_field_selection:
1227       subexpressions[0]->print();
1228       printf(". %s ", primary_expression.identifier);
1229       break;
1230
1231    case ast_plus:
1232    case ast_neg:
1233    case ast_bit_not:
1234    case ast_logic_not:
1235    case ast_pre_inc:
1236    case ast_pre_dec:
1237       printf("%s ", operator_string(oper));
1238       subexpressions[0]->print();
1239       break;
1240
1241    case ast_post_inc:
1242    case ast_post_dec:
1243       subexpressions[0]->print();
1244       printf("%s ", operator_string(oper));
1245       break;
1246
1247    case ast_conditional:
1248       subexpressions[0]->print();
1249       printf("? ");
1250       subexpressions[1]->print();
1251       printf(": ");
1252       subexpressions[2]->print();
1253       break;
1254
1255    case ast_array_index:
1256       subexpressions[0]->print();
1257       printf("[ ");
1258       subexpressions[1]->print();
1259       printf("] ");
1260       break;
1261
1262    case ast_function_call: {
1263       subexpressions[0]->print();
1264       printf("( ");
1265
1266       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1267          if (&ast->link != this->expressions.get_head())
1268             printf(", ");
1269
1270          ast->print();
1271       }
1272
1273       printf(") ");
1274       break;
1275    }
1276
1277    case ast_identifier:
1278       printf("%s ", primary_expression.identifier);
1279       break;
1280
1281    case ast_int_constant:
1282       printf("%d ", primary_expression.int_constant);
1283       break;
1284
1285    case ast_uint_constant:
1286       printf("%u ", primary_expression.uint_constant);
1287       break;
1288
1289    case ast_float_constant:
1290       printf("%f ", primary_expression.float_constant);
1291       break;
1292
1293    case ast_double_constant:
1294       printf("%f ", primary_expression.double_constant);
1295       break;
1296
1297    case ast_int64_constant:
1298       printf("%" PRId64 " ", primary_expression.int64_constant);
1299       break;
1300
1301    case ast_uint64_constant:
1302       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1303       break;
1304
1305    case ast_bool_constant:
1306       printf("%s ",
1307              primary_expression.bool_constant
1308              ? "true" : "false");
1309       break;
1310
1311    case ast_sequence: {
1312       printf("( ");
1313       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1314          if (&ast->link != this->expressions.get_head())
1315             printf(", ");
1316
1317          ast->print();
1318       }
1319       printf(") ");
1320       break;
1321    }
1322
1323    case ast_aggregate: {
1324       printf("{ ");
1325       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1326          if (&ast->link != this->expressions.get_head())
1327             printf(", ");
1328
1329          ast->print();
1330       }
1331       printf("} ");
1332       break;
1333    }
1334
1335    default:
1336       assert(0);
1337       break;
1338    }
1339 }
1340
1341 ast_expression::ast_expression(int oper,
1342                                ast_expression *ex0,
1343                                ast_expression *ex1,
1344                                ast_expression *ex2) :
1345    primary_expression()
1346 {
1347    this->oper = ast_operators(oper);
1348    this->subexpressions[0] = ex0;
1349    this->subexpressions[1] = ex1;
1350    this->subexpressions[2] = ex2;
1351    this->non_lvalue_description = NULL;
1352    this->is_lhs = false;
1353 }
1354
1355
1356 void
1357 ast_expression_statement::print(void) const
1358 {
1359    if (expression)
1360       expression->print();
1361
1362    printf("; ");
1363 }
1364
1365
1366 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1367    expression(ex)
1368 {
1369    /* empty */
1370 }
1371
1372
1373 void
1374 ast_function::print(void) const
1375 {
1376    return_type->print();
1377    printf(" %s (", identifier);
1378
1379    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1380       ast->print();
1381    }
1382
1383    printf(")");
1384 }
1385
1386
1387 ast_function::ast_function(void)
1388    : return_type(NULL), identifier(NULL), is_definition(false),
1389      signature(NULL)
1390 {
1391    /* empty */
1392 }
1393
1394
1395 void
1396 ast_fully_specified_type::print(void) const
1397 {
1398    _mesa_ast_type_qualifier_print(& qualifier);
1399    specifier->print();
1400 }
1401
1402
1403 void
1404 ast_parameter_declarator::print(void) const
1405 {
1406    type->print();
1407    if (identifier)
1408       printf("%s ", identifier);
1409    ast_opt_array_dimensions_print(array_specifier);
1410 }
1411
1412
1413 void
1414 ast_function_definition::print(void) const
1415 {
1416    prototype->print();
1417    body->print();
1418 }
1419
1420
1421 void
1422 ast_declaration::print(void) const
1423 {
1424    printf("%s ", identifier);
1425    ast_opt_array_dimensions_print(array_specifier);
1426
1427    if (initializer) {
1428       printf("= ");
1429       initializer->print();
1430    }
1431 }
1432
1433
1434 ast_declaration::ast_declaration(const char *identifier,
1435                                  ast_array_specifier *array_specifier,
1436                                  ast_expression *initializer)
1437 {
1438    this->identifier = identifier;
1439    this->array_specifier = array_specifier;
1440    this->initializer = initializer;
1441 }
1442
1443
1444 void
1445 ast_declarator_list::print(void) const
1446 {
1447    assert(type || invariant);
1448
1449    if (type)
1450       type->print();
1451    else if (invariant)
1452       printf("invariant ");
1453    else
1454       printf("precise ");
1455
1456    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1457       if (&ast->link != this->declarations.get_head())
1458          printf(", ");
1459
1460       ast->print();
1461    }
1462
1463    printf("; ");
1464 }
1465
1466
1467 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1468 {
1469    this->type = type;
1470    this->invariant = false;
1471    this->precise = false;
1472 }
1473
1474 void
1475 ast_jump_statement::print(void) const
1476 {
1477    switch (mode) {
1478    case ast_continue:
1479       printf("continue; ");
1480       break;
1481    case ast_break:
1482       printf("break; ");
1483       break;
1484    case ast_return:
1485       printf("return ");
1486       if (opt_return_value)
1487          opt_return_value->print();
1488
1489       printf("; ");
1490       break;
1491    case ast_discard:
1492       printf("discard; ");
1493       break;
1494    }
1495 }
1496
1497
1498 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1499    : opt_return_value(NULL)
1500 {
1501    this->mode = ast_jump_modes(mode);
1502
1503    if (mode == ast_return)
1504       opt_return_value = return_value;
1505 }
1506
1507
1508 void
1509 ast_selection_statement::print(void) const
1510 {
1511    printf("if ( ");
1512    condition->print();
1513    printf(") ");
1514
1515    then_statement->print();
1516
1517    if (else_statement) {
1518       printf("else ");
1519       else_statement->print();
1520    }
1521 }
1522
1523
1524 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1525                                                  ast_node *then_statement,
1526                                                  ast_node *else_statement)
1527 {
1528    this->condition = condition;
1529    this->then_statement = then_statement;
1530    this->else_statement = else_statement;
1531 }
1532
1533
1534 void
1535 ast_switch_statement::print(void) const
1536 {
1537    printf("switch ( ");
1538    test_expression->print();
1539    printf(") ");
1540
1541    body->print();
1542 }
1543
1544
1545 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1546                                            ast_node *body)
1547 {
1548    this->test_expression = test_expression;
1549    this->body = body;
1550 }
1551
1552
1553 void
1554 ast_switch_body::print(void) const
1555 {
1556    printf("{\n");
1557    if (stmts != NULL) {
1558       stmts->print();
1559    }
1560    printf("}\n");
1561 }
1562
1563
1564 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1565 {
1566    this->stmts = stmts;
1567 }
1568
1569
1570 void ast_case_label::print(void) const
1571 {
1572    if (test_value != NULL) {
1573       printf("case ");
1574       test_value->print();
1575       printf(": ");
1576    } else {
1577       printf("default: ");
1578    }
1579 }
1580
1581
1582 ast_case_label::ast_case_label(ast_expression *test_value)
1583 {
1584    this->test_value = test_value;
1585 }
1586
1587
1588 void ast_case_label_list::print(void) const
1589 {
1590    foreach_list_typed(ast_node, ast, link, & this->labels) {
1591       ast->print();
1592    }
1593    printf("\n");
1594 }
1595
1596
1597 ast_case_label_list::ast_case_label_list(void)
1598 {
1599 }
1600
1601
1602 void ast_case_statement::print(void) const
1603 {
1604    labels->print();
1605    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1606       ast->print();
1607       printf("\n");
1608    }
1609 }
1610
1611
1612 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1613 {
1614    this->labels = labels;
1615 }
1616
1617
1618 void ast_case_statement_list::print(void) const
1619 {
1620    foreach_list_typed(ast_node, ast, link, & this->cases) {
1621       ast->print();
1622    }
1623 }
1624
1625
1626 ast_case_statement_list::ast_case_statement_list(void)
1627 {
1628 }
1629
1630
1631 void
1632 ast_iteration_statement::print(void) const
1633 {
1634    switch (mode) {
1635    case ast_for:
1636       printf("for( ");
1637       if (init_statement)
1638          init_statement->print();
1639       printf("; ");
1640
1641       if (condition)
1642          condition->print();
1643       printf("; ");
1644
1645       if (rest_expression)
1646          rest_expression->print();
1647       printf(") ");
1648
1649       body->print();
1650       break;
1651
1652    case ast_while:
1653       printf("while ( ");
1654       if (condition)
1655          condition->print();
1656       printf(") ");
1657       body->print();
1658       break;
1659
1660    case ast_do_while:
1661       printf("do ");
1662       body->print();
1663       printf("while ( ");
1664       if (condition)
1665          condition->print();
1666       printf("); ");
1667       break;
1668    }
1669 }
1670
1671
1672 ast_iteration_statement::ast_iteration_statement(int mode,
1673                                                  ast_node *init,
1674                                                  ast_node *condition,
1675                                                  ast_expression *rest_expression,
1676                                                  ast_node *body)
1677 {
1678    this->mode = ast_iteration_modes(mode);
1679    this->init_statement = init;
1680    this->condition = condition;
1681    this->rest_expression = rest_expression;
1682    this->body = body;
1683 }
1684
1685
1686 void
1687 ast_struct_specifier::print(void) const
1688 {
1689    printf("struct %s { ", name);
1690    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1691       ast->print();
1692    }
1693    printf("} ");
1694 }
1695
1696
1697 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1698                                            ast_declarator_list *declarator_list)
1699    : name(identifier), layout(NULL), declarations(), is_declaration(true),
1700      type(NULL)
1701 {
1702    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1703 }
1704
1705 void ast_subroutine_list::print(void) const
1706 {
1707    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1708       if (&ast->link != this->declarations.get_head())
1709          printf(", ");
1710       ast->print();
1711    }
1712 }
1713
1714 static void
1715 set_shader_inout_layout(struct gl_shader *shader,
1716                      struct _mesa_glsl_parse_state *state)
1717 {
1718    /* Should have been prevented by the parser. */
1719    if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1720        shader->Stage == MESA_SHADER_VERTEX) {
1721       assert(!state->in_qualifier->flags.i);
1722    } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1723               shader->Stage != MESA_SHADER_TESS_EVAL) {
1724       assert(!state->in_qualifier->flags.i);
1725    }
1726
1727    if (shader->Stage != MESA_SHADER_COMPUTE) {
1728       /* Should have been prevented by the parser. */
1729       assert(!state->cs_input_local_size_specified);
1730       assert(!state->cs_input_local_size_variable_specified);
1731    }
1732
1733    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1734       /* Should have been prevented by the parser. */
1735       assert(!state->fs_uses_gl_fragcoord);
1736       assert(!state->fs_redeclares_gl_fragcoord);
1737       assert(!state->fs_pixel_center_integer);
1738       assert(!state->fs_origin_upper_left);
1739       assert(!state->fs_early_fragment_tests);
1740       assert(!state->fs_inner_coverage);
1741       assert(!state->fs_post_depth_coverage);
1742       assert(!state->fs_pixel_interlock_ordered);
1743       assert(!state->fs_pixel_interlock_unordered);
1744       assert(!state->fs_sample_interlock_ordered);
1745       assert(!state->fs_sample_interlock_unordered);
1746    }
1747
1748    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1749       if (state->out_qualifier->out_xfb_stride[i]) {
1750          unsigned xfb_stride;
1751          if (state->out_qualifier->out_xfb_stride[i]->
1752                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1753                 true)) {
1754             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1755          }
1756       }
1757    }
1758
1759    switch (shader->Stage) {
1760    case MESA_SHADER_TESS_CTRL:
1761       shader->info.TessCtrl.VerticesOut = 0;
1762       if (state->tcs_output_vertices_specified) {
1763          unsigned vertices;
1764          if (state->out_qualifier->vertices->
1765                process_qualifier_constant(state, "vertices", &vertices,
1766                                           false)) {
1767
1768             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1769             if (vertices > state->Const.MaxPatchVertices) {
1770                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1771                                 "GL_MAX_PATCH_VERTICES", vertices);
1772             }
1773             shader->info.TessCtrl.VerticesOut = vertices;
1774          }
1775       }
1776       break;
1777    case MESA_SHADER_TESS_EVAL:
1778       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1779       if (state->in_qualifier->flags.q.prim_type)
1780          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1781
1782       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1783       if (state->in_qualifier->flags.q.vertex_spacing)
1784          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1785
1786       shader->info.TessEval.VertexOrder = 0;
1787       if (state->in_qualifier->flags.q.ordering)
1788          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1789
1790       shader->info.TessEval.PointMode = -1;
1791       if (state->in_qualifier->flags.q.point_mode)
1792          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1793       break;
1794    case MESA_SHADER_GEOMETRY:
1795       shader->info.Geom.VerticesOut = -1;
1796       if (state->out_qualifier->flags.q.max_vertices) {
1797          unsigned qual_max_vertices;
1798          if (state->out_qualifier->max_vertices->
1799                process_qualifier_constant(state, "max_vertices",
1800                                           &qual_max_vertices, true)) {
1801
1802             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1803                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1804                _mesa_glsl_error(&loc, state,
1805                                 "maximum output vertices (%d) exceeds "
1806                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1807                                 qual_max_vertices);
1808             }
1809             shader->info.Geom.VerticesOut = qual_max_vertices;
1810          }
1811       }
1812
1813       if (state->gs_input_prim_type_specified) {
1814          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1815       } else {
1816          shader->info.Geom.InputType = PRIM_UNKNOWN;
1817       }
1818
1819       if (state->out_qualifier->flags.q.prim_type) {
1820          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1821       } else {
1822          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1823       }
1824
1825       shader->info.Geom.Invocations = 0;
1826       if (state->in_qualifier->flags.q.invocations) {
1827          unsigned invocations;
1828          if (state->in_qualifier->invocations->
1829                process_qualifier_constant(state, "invocations",
1830                                           &invocations, false)) {
1831
1832             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1833             if (invocations > state->Const.MaxGeometryShaderInvocations) {
1834                _mesa_glsl_error(&loc, state,
1835                                 "invocations (%d) exceeds "
1836                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1837                                 invocations);
1838             }
1839             shader->info.Geom.Invocations = invocations;
1840          }
1841       }
1842       break;
1843
1844    case MESA_SHADER_COMPUTE:
1845       if (state->cs_input_local_size_specified) {
1846          for (int i = 0; i < 3; i++)
1847             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1848       } else {
1849          for (int i = 0; i < 3; i++)
1850             shader->info.Comp.LocalSize[i] = 0;
1851       }
1852
1853       shader->info.Comp.LocalSizeVariable =
1854          state->cs_input_local_size_variable_specified;
1855       break;
1856
1857    case MESA_SHADER_FRAGMENT:
1858       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1859       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1860       shader->pixel_center_integer = state->fs_pixel_center_integer;
1861       shader->origin_upper_left = state->fs_origin_upper_left;
1862       shader->ARB_fragment_coord_conventions_enable =
1863          state->ARB_fragment_coord_conventions_enable;
1864       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1865       shader->InnerCoverage = state->fs_inner_coverage;
1866       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1867       shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
1868       shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
1869       shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
1870       shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
1871       shader->BlendSupport = state->fs_blend_support;
1872       break;
1873
1874    default:
1875       /* Nothing to do. */
1876       break;
1877    }
1878
1879    shader->bindless_sampler = state->bindless_sampler_specified;
1880    shader->bindless_image = state->bindless_image_specified;
1881    shader->bound_sampler = state->bound_sampler_specified;
1882    shader->bound_image = state->bound_image_specified;
1883 }
1884
1885 /* src can be NULL if only the symbols found in the exec_list should be
1886  * copied
1887  */
1888 void
1889 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1890                                    struct glsl_symbol_table *src,
1891                                    struct glsl_symbol_table *dest)
1892 {
1893    foreach_in_list (ir_instruction, ir, shader_ir) {
1894       switch (ir->ir_type) {
1895       case ir_type_function:
1896          dest->add_function((ir_function *) ir);
1897          break;
1898       case ir_type_variable: {
1899          ir_variable *const var = (ir_variable *) ir;
1900
1901          if (var->data.mode != ir_var_temporary)
1902             dest->add_variable(var);
1903          break;
1904       }
1905       default:
1906          break;
1907       }
1908    }
1909
1910    if (src != NULL) {
1911       /* Explicitly copy the gl_PerVertex interface definitions because these
1912        * are needed to check they are the same during the interstage link.
1913        * They can’t necessarily be found via the exec_list because the members
1914        * might not be referenced. The GL spec still requires that they match
1915        * in that case.
1916        */
1917       const glsl_type *iface =
1918          src->get_interface("gl_PerVertex", ir_var_shader_in);
1919       if (iface)
1920          dest->add_interface(iface->name, iface, ir_var_shader_in);
1921
1922       iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1923       if (iface)
1924          dest->add_interface(iface->name, iface, ir_var_shader_out);
1925    }
1926 }
1927
1928 extern "C" {
1929
1930 static void
1931 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1932 {
1933    int j, k;
1934    int index = 0;
1935
1936    for (j = 0; j < state->num_subroutines; j++) {
1937       while (state->subroutines[j]->subroutine_index == -1) {
1938          for (k = 0; k < state->num_subroutines; k++) {
1939             if (state->subroutines[k]->subroutine_index == index)
1940                break;
1941             else if (k == state->num_subroutines - 1) {
1942                state->subroutines[j]->subroutine_index = index;
1943             }
1944          }
1945          index++;
1946       }
1947    }
1948 }
1949
1950 static void
1951 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1952                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1953                     struct glcpp_parser *data,
1954                     unsigned version,
1955                     bool es)
1956 {
1957    unsigned gl_version = state->ctx->Extensions.Version;
1958    gl_api api = state->ctx->API;
1959
1960    if (gl_version != 0xff) {
1961       unsigned i;
1962       for (i = 0; i < state->num_supported_versions; i++) {
1963          if (state->supported_versions[i].ver == version &&
1964              state->supported_versions[i].es == es) {
1965             gl_version = state->supported_versions[i].gl_ver;
1966             break;
1967          }
1968       }
1969
1970       if (i == state->num_supported_versions)
1971          return;
1972    }
1973
1974    if (es)
1975       api = API_OPENGLES2;
1976
1977    for (unsigned i = 0;
1978         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
1979       const _mesa_glsl_extension *extension
1980          = &_mesa_glsl_supported_extensions[i];
1981       if (extension->compatible_with_state(state, api, gl_version)) {
1982          add_builtin_define(data, extension->name, 1);
1983       }
1984    }
1985 }
1986
1987 /* Implements parsing checks that we can't do during parsing */
1988 static void
1989 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
1990 {
1991    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
1992       YYLTYPE loc;
1993       memset(&loc, 0, sizeof(loc));
1994       _mesa_glsl_error(&loc, state, "Compute shaders require "
1995                        "GLSL 4.30 or GLSL ES 3.10");
1996    }
1997 }
1998
1999 static void
2000 opt_shader_and_create_symbol_table(struct gl_context *ctx,
2001                                    struct glsl_symbol_table *source_symbols,
2002                                    struct gl_shader *shader)
2003 {
2004    assert(shader->CompileStatus != COMPILE_FAILURE &&
2005           !shader->ir->is_empty());
2006
2007    struct gl_shader_compiler_options *options =
2008       &ctx->Const.ShaderCompilerOptions[shader->Stage];
2009
2010    /* Do some optimization at compile time to reduce shader IR size
2011     * and reduce later work if the same shader is linked multiple times
2012     */
2013    if (ctx->Const.GLSLOptimizeConservatively) {
2014       /* Run it just once. */
2015       do_common_optimization(shader->ir, false, false, options,
2016                              ctx->Const.NativeIntegers);
2017    } else {
2018       /* Repeat it until it stops making changes. */
2019       while (do_common_optimization(shader->ir, false, false, options,
2020                                     ctx->Const.NativeIntegers))
2021          ;
2022    }
2023
2024    validate_ir_tree(shader->ir);
2025
2026    enum ir_variable_mode other;
2027    switch (shader->Stage) {
2028    case MESA_SHADER_VERTEX:
2029       other = ir_var_shader_in;
2030       break;
2031    case MESA_SHADER_FRAGMENT:
2032       other = ir_var_shader_out;
2033       break;
2034    default:
2035       /* Something invalid to ensure optimize_dead_builtin_uniforms
2036        * doesn't remove anything other than uniforms or constants.
2037        */
2038       other = ir_var_mode_count;
2039       break;
2040    }
2041
2042    optimize_dead_builtin_variables(shader->ir, other);
2043
2044    validate_ir_tree(shader->ir);
2045
2046    /* Retain any live IR, but trash the rest. */
2047    reparent_ir(shader->ir, shader->ir);
2048
2049    /* Destroy the symbol table.  Create a new symbol table that contains only
2050     * the variables and functions that still exist in the IR.  The symbol
2051     * table will be used later during linking.
2052     *
2053     * There must NOT be any freed objects still referenced by the symbol
2054     * table.  That could cause the linker to dereference freed memory.
2055     *
2056     * We don't have to worry about types or interface-types here because those
2057     * are fly-weights that are looked up by glsl_type.
2058     */
2059    _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2060                                       shader->symbols);
2061 }
2062
2063 void
2064 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2065                           bool dump_ast, bool dump_hir, bool force_recompile)
2066 {
2067    const char *source = force_recompile && shader->FallbackSource ?
2068       shader->FallbackSource : shader->Source;
2069
2070    if (!force_recompile) {
2071       if (ctx->Cache) {
2072          char buf[41];
2073          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2074                                 shader->sha1);
2075          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2076             /* We've seen this shader before and know it compiles */
2077             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2078                _mesa_sha1_format(buf, shader->sha1);
2079                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2080             }
2081             shader->CompileStatus = COMPILE_SKIPPED;
2082
2083             free((void *)shader->FallbackSource);
2084             shader->FallbackSource = NULL;
2085             return;
2086          }
2087       }
2088    } else {
2089       /* We should only ever end up here if a re-compile has been forced by a
2090        * shader cache miss. In which case we can skip the compile if its
2091        * already be done by a previous fallback or the initial compile call.
2092        */
2093       if (shader->CompileStatus == COMPILE_SUCCESS)
2094          return;
2095    }
2096
2097    struct _mesa_glsl_parse_state *state =
2098       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2099
2100    if (ctx->Const.GenerateTemporaryNames)
2101       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2102                               false, true);
2103
2104    state->error = glcpp_preprocess(state, &source, &state->info_log,
2105                                    add_builtin_defines, state, ctx);
2106
2107    if (!state->error) {
2108      _mesa_glsl_lexer_ctor(state, source);
2109      _mesa_glsl_parse(state);
2110      _mesa_glsl_lexer_dtor(state);
2111      do_late_parsing_checks(state);
2112    }
2113
2114    if (dump_ast) {
2115       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2116          ast->print();
2117       }
2118       printf("\n\n");
2119    }
2120
2121    ralloc_free(shader->ir);
2122    shader->ir = new(shader) exec_list;
2123    if (!state->error && !state->translation_unit.is_empty())
2124       _mesa_ast_to_hir(shader->ir, state);
2125
2126    if (!state->error) {
2127       validate_ir_tree(shader->ir);
2128
2129       /* Print out the unoptimized IR. */
2130       if (dump_hir) {
2131          _mesa_print_ir(stdout, shader->ir, state);
2132       }
2133    }
2134
2135    if (shader->InfoLog)
2136       ralloc_free(shader->InfoLog);
2137
2138    if (!state->error)
2139       set_shader_inout_layout(shader, state);
2140
2141    shader->symbols = new(shader->ir) glsl_symbol_table;
2142    shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2143    shader->InfoLog = state->info_log;
2144    shader->Version = state->language_version;
2145    shader->IsES = state->es_shader;
2146
2147    if (!state->error && !shader->ir->is_empty()) {
2148       assign_subroutine_indexes(state);
2149       lower_subroutine(shader->ir, state);
2150       opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2151    }
2152
2153    if (!force_recompile) {
2154       free((void *)shader->FallbackSource);
2155       shader->FallbackSource = NULL;
2156    }
2157
2158    delete state->symbols;
2159    ralloc_free(state);
2160
2161    if (ctx->Cache && shader->CompileStatus == COMPILE_SUCCESS) {
2162       char sha1_buf[41];
2163       disk_cache_put_key(ctx->Cache, shader->sha1);
2164       if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2165          _mesa_sha1_format(sha1_buf, shader->sha1);
2166          fprintf(stderr, "marking shader: %s\n", sha1_buf);
2167       }
2168    }
2169 }
2170
2171 } /* extern "C" */
2172 /**
2173  * Do the set of common optimizations passes
2174  *
2175  * \param ir                          List of instructions to be optimized
2176  * \param linked                      Is the shader linked?  This enables
2177  *                                    optimizations passes that remove code at
2178  *                                    global scope and could cause linking to
2179  *                                    fail.
2180  * \param uniform_locations_assigned  Have locations already been assigned for
2181  *                                    uniforms?  This prevents the declarations
2182  *                                    of unused uniforms from being removed.
2183  *                                    The setting of this flag only matters if
2184  *                                    \c linked is \c true.
2185  * \param options                     The driver's preferred shader options.
2186  * \param native_integers             Selects optimizations that depend on the
2187  *                                    implementations supporting integers
2188  *                                    natively (as opposed to supporting
2189  *                                    integers in floating point registers).
2190  */
2191 bool
2192 do_common_optimization(exec_list *ir, bool linked,
2193                        bool uniform_locations_assigned,
2194                        const struct gl_shader_compiler_options *options,
2195                        bool native_integers)
2196 {
2197    const bool debug = false;
2198    GLboolean progress = GL_FALSE;
2199
2200 #define OPT(PASS, ...) do {                                             \
2201       if (debug) {                                                      \
2202          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2203          const bool opt_progress = PASS(__VA_ARGS__);                   \
2204          progress = opt_progress || progress;                           \
2205          if (opt_progress)                                              \
2206             _mesa_print_ir(stderr, ir, NULL);                           \
2207          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2208                  #PASS, opt_progress ? "made" : "no");                  \
2209       } else {                                                          \
2210          progress = PASS(__VA_ARGS__) || progress;                      \
2211       }                                                                 \
2212    } while (false)
2213
2214    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2215
2216    if (linked) {
2217       OPT(do_function_inlining, ir);
2218       OPT(do_dead_functions, ir);
2219       OPT(do_structure_splitting, ir);
2220    }
2221    propagate_invariance(ir);
2222    OPT(do_if_simplification, ir);
2223    OPT(opt_flatten_nested_if_blocks, ir);
2224    OPT(opt_conditional_discard, ir);
2225    OPT(do_copy_propagation_elements, ir);
2226
2227    if (options->OptimizeForAOS && !linked)
2228       OPT(opt_flip_matrices, ir);
2229
2230    if (linked && options->OptimizeForAOS) {
2231       OPT(do_vectorize, ir);
2232    }
2233
2234    if (linked)
2235       OPT(do_dead_code, ir, uniform_locations_assigned);
2236    else
2237       OPT(do_dead_code_unlinked, ir);
2238    OPT(do_dead_code_local, ir);
2239    OPT(do_tree_grafting, ir);
2240    OPT(do_constant_propagation, ir);
2241    if (linked)
2242       OPT(do_constant_variable, ir);
2243    else
2244       OPT(do_constant_variable_unlinked, ir);
2245    OPT(do_constant_folding, ir);
2246    OPT(do_minmax_prune, ir);
2247    OPT(do_rebalance_tree, ir);
2248    OPT(do_algebraic, ir, native_integers, options);
2249    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2250        options->EmitNoCont, options->EmitNoLoops);
2251    OPT(do_vec_index_to_swizzle, ir);
2252    OPT(lower_vector_insert, ir, false);
2253    OPT(optimize_swizzles, ir);
2254
2255    OPT(optimize_split_arrays, ir, linked);
2256    OPT(optimize_redundant_jumps, ir);
2257
2258    if (options->MaxUnrollIterations) {
2259       loop_state *ls = analyze_loop_variables(ir);
2260       if (ls->loop_found) {
2261          bool loop_progress = unroll_loops(ir, ls, options);
2262          while (loop_progress) {
2263             loop_progress = false;
2264             loop_progress |= do_constant_propagation(ir);
2265             loop_progress |= do_if_simplification(ir);
2266
2267             /* Some drivers only call do_common_optimization() once rather
2268              * than in a loop. So we must call do_lower_jumps() after
2269              * unrolling a loop because for drivers that use LLVM validation
2270              * will fail if a jump is not the last instruction in the block.
2271              * For example the following will fail LLVM validation:
2272              *
2273              *   (loop (
2274              *      ...
2275              *   break
2276              *   (assign  (x) (var_ref v124)  (expression int + (var_ref v124)
2277              *      (constant int (1)) ) )
2278              *   ))
2279              */
2280             loop_progress |= do_lower_jumps(ir, true, true,
2281                                             options->EmitNoMainReturn,
2282                                             options->EmitNoCont,
2283                                             options->EmitNoLoops);
2284          }
2285          progress |= loop_progress;
2286       }
2287       delete ls;
2288    }
2289
2290 #undef OPT
2291
2292    return progress;
2293 }
2294
2295 extern "C" {
2296
2297 /**
2298  * To be called at GL teardown time, this frees compiler datastructures.
2299  *
2300  * After calling this, any previously compiled shaders and shader
2301  * programs would be invalid.  So this should happen at approximately
2302  * program exit.
2303  */
2304 void
2305 _mesa_destroy_shader_compiler(void)
2306 {
2307    _mesa_destroy_shader_compiler_caches();
2308
2309    _mesa_glsl_release_types();
2310 }
2311
2312 /**
2313  * Releases compiler caches to trade off performance for memory.
2314  *
2315  * Intended to be used with glReleaseShaderCompiler().
2316  */
2317 void
2318 _mesa_destroy_shader_compiler_caches(void)
2319 {
2320    _mesa_glsl_release_builtin_functions();
2321 }
2322
2323 }