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