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->found_begin_interlock = false;
 201    this->found_end_interlock = false;
 202    this->all_invariant = false;
 203    this->user_structures = NULL;
 204    this->num_user_structures = 0;
 205    this->num_subroutines = 0;
 206    this->subroutines = NULL;
 207    this->num_subroutine_types = 0;
 208    this->subroutine_types = NULL;
 209
 210    /* supported_versions should be large enough to support the known desktop
 211     * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
 212     */
 213    STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 4) ==
 214                  ARRAY_SIZE(this->supported_versions));
 215
 216    /* Populate the list of supported GLSL versions */
 217    /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
 218     * the OpenGL 3.2 Core context is supported, this logic will need
 219     * change.  Older versions of GLSL are no longer supported
 220     * outside the compatibility contexts of 3.x.
 221     */
 222    this->num_supported_versions = 0;
 223    if (_mesa_is_desktop_gl(ctx)) {
 224       for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
 225          if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
 226             this->supported_versions[this->num_supported_versions].ver
 227                = known_desktop_glsl_versions[i];
 228             this->supported_versions[this->num_supported_versions].gl_ver
 229                = known_desktop_gl_versions[i];
 230             this->supported_versions[this->num_supported_versions].es = false;
 231             this->num_supported_versions++;
 232          }
 233       }
 234    }
 235    if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
 236       this->supported_versions[this->num_supported_versions].ver = 100;
 237       this->supported_versions[this->num_supported_versions].gl_ver = 20;
 238       this->supported_versions[this->num_supported_versions].es = true;
 239       this->num_supported_versions++;
 240    }
 241    if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
 242       this->supported_versions[this->num_supported_versions].ver = 300;
 243       this->supported_versions[this->num_supported_versions].gl_ver = 30;
 244       this->supported_versions[this->num_supported_versions].es = true;
 245       this->num_supported_versions++;
 246    }
 247    if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
 248       this->supported_versions[this->num_supported_versions].ver = 310;
 249       this->supported_versions[this->num_supported_versions].gl_ver = 31;
 250       this->supported_versions[this->num_supported_versions].es = true;
 251       this->num_supported_versions++;
 252    }
 253    if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
 254        ctx->Extensions.ARB_ES3_2_compatibility) {
 255       this->supported_versions[this->num_supported_versions].ver = 320;
 256       this->supported_versions[this->num_supported_versions].gl_ver = 32;
 257       this->supported_versions[this->num_supported_versions].es = true;
 258       this->num_supported_versions++;
 259    }
 260
 261    /* Create a string for use in error messages to tell the user which GLSL
 262     * versions are supported.
 263     */
 264    char *supported = ralloc_strdup(this, "");
 265    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 266       unsigned ver = this->supported_versions[i].ver;
 267       const char *const prefix = (i == 0)
 268          ? ""
 269          : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
 270       const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
 271
 272       ralloc_asprintf_append(& supported, "%s%u.%02u%s",
 273                              prefix,
 274                              ver / 100, ver % 100,
 275                              suffix);
 276    }
 277
 278    this->supported_version_string = supported;
 279
 280    if (ctx->Const.ForceGLSLExtensionsWarn)
 281       _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
 282
 283    this->default_uniform_qualifier = new(this) ast_type_qualifier();
 284    this->default_uniform_qualifier->flags.q.shared = 1;
 285    this->default_uniform_qualifier->flags.q.column_major = 1;
 286
 287    this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
 288    this->default_shader_storage_qualifier->flags.q.shared = 1;
 289    this->default_shader_storage_qualifier->flags.q.column_major = 1;
 290
 291    this->fs_uses_gl_fragcoord = false;
 292    this->fs_redeclares_gl_fragcoord = false;
 293    this->fs_origin_upper_left = false;
 294    this->fs_pixel_center_integer = false;
 295    this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
 296
 297    this->gs_input_prim_type_specified = false;
 298    this->tcs_output_vertices_specified = false;
 299    this->gs_input_size = 0;
 300    this->in_qualifier = new(this) ast_type_qualifier();
 301    this->out_qualifier = new(this) ast_type_qualifier();
 302    this->fs_early_fragment_tests = false;
 303    this->fs_inner_coverage = false;
 304    this->fs_post_depth_coverage = false;
 305    this->fs_pixel_interlock_ordered = false;
 306    this->fs_pixel_interlock_unordered = false;
 307    this->fs_sample_interlock_ordered = false;
 308    this->fs_sample_interlock_unordered = false;
 309    this->fs_blend_support = 0;
 310    memset(this->atomic_counter_offsets, 0,
 311           sizeof(this->atomic_counter_offsets));
 312    this->allow_extension_directive_midshader =
 313       ctx->Const.AllowGLSLExtensionDirectiveMidShader;
 314    this->allow_builtin_variable_redeclaration =
 315       ctx->Const.AllowGLSLBuiltinVariableRedeclaration;
 316    this->allow_layout_qualifier_on_function_parameter =
 317       ctx->Const.AllowLayoutQualifiersOnFunctionParameters;
 318
 319    this->cs_input_local_size_variable_specified = false;
 320
 321    /* ARB_bindless_texture */
 322    this->bindless_sampler_specified = false;
 323    this->bindless_image_specified = false;
 324    this->bound_sampler_specified = false;
 325    this->bound_image_specified = false;
 326 }
 327
 328 /**
 329  * Determine whether the current GLSL version is sufficiently high to support
 330  * a certain feature, and generate an error message if it isn't.
 331  *
 332  * \param required_glsl_version and \c required_glsl_es_version are
 333  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 334  *
 335  * \param locp is the parser location where the error should be reported.
 336  *
 337  * \param fmt (and additional arguments) constitute a printf-style error
 338  * message to report if the version check fails.  Information about the
 339  * current and required GLSL versions will be appended.  So, for example, if
 340  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 341  * "foo unsupported") is called, the error message will be "foo unsupported in
 342  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 343  */
 344 bool
 345 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 346                                       unsigned required_glsl_es_version,
 347                                       YYLTYPE *locp, const char *fmt, ...)
 348 {
 349    if (this->is_version(required_glsl_version, required_glsl_es_version))
 350       return true;
 351
 352    va_list args;
 353    va_start(args, fmt);
 354    char *problem = ralloc_vasprintf(this, fmt, args);
 355    va_end(args);
 356    const char *glsl_version_string
 357       = glsl_compute_version_string(this, false, required_glsl_version);
 358    const char *glsl_es_version_string
 359       = glsl_compute_version_string(this, true, required_glsl_es_version);
 360    const char *requirement_string = "";
 361    if (required_glsl_version && required_glsl_es_version) {
 362       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 363                                            glsl_version_string,
 364                                            glsl_es_version_string);
 365    } else if (required_glsl_version) {
 366       requirement_string = ralloc_asprintf(this, " (%s required)",
 367                                            glsl_version_string);
 368    } else if (required_glsl_es_version) {
 369       requirement_string = ralloc_asprintf(this, " (%s required)",
 370                                            glsl_es_version_string);
 371    }
 372    _mesa_glsl_error(locp, this, "%s in %s%s",
 373                     problem, this->get_version_string(),
 374                     requirement_string);
 375
 376    return false;
 377 }
 378
 379 /**
 380  * Process a GLSL #version directive.
 381  *
 382  * \param version is the integer that follows the #version token.
 383  *
 384  * \param ident is a string identifier that follows the integer, if any is
 385  * present.  Otherwise NULL.
 386  */
 387 void
 388 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 389                                                   const char *ident)
 390 {
 391    bool es_token_present = false;
 392    bool compat_token_present = false;
 393    if (ident) {
 394       if (strcmp(ident, "es") == 0) {
 395          es_token_present = true;
 396       } else if (version >= 150) {
 397          if (strcmp(ident, "core") == 0) {
 398             /* Accept the token.  There's no need to record that this is
 399              * a core profile shader since that's the only profile we support.
 400              */
 401          } else if (strcmp(ident, "compatibility") == 0) {
 402             compat_token_present = true;
 403
 404             if (this->ctx->API != API_OPENGL_COMPAT) {
 405                _mesa_glsl_error(locp, this,
 406                                 "the compatibility profile is not supported");
 407             }
 408          } else {
 409             _mesa_glsl_error(locp, this,
 410                              "\"%s\" is not a valid shading language profile; "
 411                              "if present, it must be \"core\"", ident);
 412          }
 413       } else {
 414          _mesa_glsl_error(locp, this,
 415                           "illegal text following version number");
 416       }
 417    }
 418
 419    this->es_shader = es_token_present;
 420    if (version == 100) {
 421       if (es_token_present) {
 422          _mesa_glsl_error(locp, this,
 423                           "GLSL 1.00 ES should be selected using "
 424                           "`#version 100'");
 425       } else {
 426          this->es_shader = true;
 427       }
 428    }
 429
 430    if (this->es_shader) {
 431       this->ARB_texture_rectangle_enable = false;
 432    }
 433
 434    if (this->forced_language_version)
 435       this->language_version = this->forced_language_version;
 436    else
 437       this->language_version = version;
 438
 439    this->compat_shader = compat_token_present ||
 440                          (this->ctx->API == API_OPENGL_COMPAT &&
 441                           this->language_version == 140) ||
 442                          (!this->es_shader && this->language_version < 140);
 443
 444    bool supported = false;
 445    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 446       if (this->supported_versions[i].ver == this->language_version
 447           && this->supported_versions[i].es == this->es_shader) {
 448          this->gl_version = this->supported_versions[i].gl_ver;
 449          supported = true;
 450          break;
 451       }
 452    }
 453
 454    if (!supported) {
 455       _mesa_glsl_error(locp, this, "%s is not supported. "
 456                        "Supported versions are: %s",
 457                        this->get_version_string(),
 458                        this->supported_version_string);
 459
 460       /* On exit, the language_version must be set to a valid value.
 461        * Later calls to _mesa_glsl_initialize_types will misbehave if
 462        * the version is invalid.
 463        */
 464       switch (this->ctx->API) {
 465       case API_OPENGL_COMPAT:
 466       case API_OPENGL_CORE:
 467          this->language_version = this->ctx->Const.GLSLVersion;
 468          break;
 469
 470       case API_OPENGLES:
 471          assert(!"Should not get here.");
 472          /* FALLTHROUGH */
 473
 474       case API_OPENGLES2:
 475          this->language_version = 100;
 476          break;
 477       }
 478    }
 479 }
 480
 481
 482 /* This helper function will append the given message to the shader's
 483    info log and report it via GL_ARB_debug_output. Per that extension,
 484    'type' is one of the enum values classifying the message, and
 485    'id' is the implementation-defined ID of the given message. */
 486 static void
 487 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 488                GLenum type, const char *fmt, va_list ap)
 489 {
 490    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 491    GLuint msg_id = 0;
 492
 493    assert(state->info_log != NULL);
 494
 495    /* Get the offset that the new message will be written to. */
 496    int msg_offset = strlen(state->info_log);
 497
 498    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 499                                             locp->source,
 500                                             locp->first_line,
 501                                             locp->first_column,
 502                                             error ? "error" : "warning");
 503    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 504
 505    const char *const msg = &state->info_log[msg_offset];
 506    struct gl_context *ctx = state->ctx;
 507
 508    /* Report the error via GL_ARB_debug_output. */
 509    _mesa_shader_debug(ctx, type, &msg_id, msg);
 510
 511    ralloc_strcat(&state->info_log, "\n");
 512 }
 513
 514 void
 515 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 516                  const char *fmt, ...)
 517 {
 518    va_list ap;
 519
 520    state->error = true;
 521
 522    va_start(ap, fmt);
 523    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 524    va_end(ap);
 525 }
 526
 527
 528 void
 529 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 530                    const char *fmt, ...)
 531 {
 532    if (state->warnings_enabled) {
 533       va_list ap;
 534
 535       va_start(ap, fmt);
 536       _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 537       va_end(ap);
 538    }
 539 }
 540
 541
 542 /**
 543  * Enum representing the possible behaviors that can be specified in
 544  * an #extension directive.
 545  */
 546 enum ext_behavior {
 547    extension_disable,
 548    extension_enable,
 549    extension_require,
 550    extension_warn
 551 };
 552
 553 /**
 554  * Element type for _mesa_glsl_supported_extensions
 555  */
 556 struct _mesa_glsl_extension {
 557    /**
 558     * Name of the extension when referred to in a GLSL extension
 559     * statement
 560     */
 561    const char *name;
 562
 563    /**
 564     * Whether this extension is a part of AEP
 565     */
 566    bool aep;
 567
 568    /**
 569     * Predicate that checks whether the relevant extension is available for
 570     * this context.
 571     */
 572    bool (*available_pred)(const struct gl_context *,
 573                           gl_api api, uint8_t version);
 574
 575    /**
 576     * Flag in the _mesa_glsl_parse_state struct that should be set
 577     * when this extension is enabled.
 578     *
 579     * See note in _mesa_glsl_extension::supported_flag about "pointer
 580     * to member" types.
 581     */
 582    bool _mesa_glsl_parse_state::* enable_flag;
 583
 584    /**
 585     * Flag in the _mesa_glsl_parse_state struct that should be set
 586     * when the shader requests "warn" behavior for this extension.
 587     *
 588     * See note in _mesa_glsl_extension::supported_flag about "pointer
 589     * to member" types.
 590     */
 591    bool _mesa_glsl_parse_state::* warn_flag;
 592
 593
 594    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 595                               gl_api api, uint8_t gl_version) const;
 596    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 597 };
 598
 599 /** Checks if the context supports a user-facing extension */
 600 #define EXT(name_str, driver_cap, ...) \
 601 static UNUSED bool \
 602 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 603 { \
 604    return ctx->Extensions.driver_cap && (version >= \
 605           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 606 }
 607 #include "main/extensions_table.h"
 608 #undef EXT
 609
 610 #define EXT(NAME)                                           \
 611    { "GL_" #NAME, false, has_##NAME,                        \
 612      &_mesa_glsl_parse_state::NAME##_enable,                \
 613      &_mesa_glsl_parse_state::NAME##_warn }
 614
 615 #define EXT_AEP(NAME)                                       \
 616    { "GL_" #NAME, true, has_##NAME,                         \
 617      &_mesa_glsl_parse_state::NAME##_enable,                \
 618      &_mesa_glsl_parse_state::NAME##_warn }
 619
 620 /**
 621  * Table of extensions that can be enabled/disabled within a shader,
 622  * and the conditions under which they are supported.
 623  */
 624 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 625    /* ARB extensions go here, sorted alphabetically.
 626     */
 627    EXT(ARB_ES3_1_compatibility),
 628    EXT(ARB_ES3_2_compatibility),
 629    EXT(ARB_arrays_of_arrays),
 630    EXT(ARB_bindless_texture),
 631    EXT(ARB_compatibility),
 632    EXT(ARB_compute_shader),
 633    EXT(ARB_compute_variable_group_size),
 634    EXT(ARB_conservative_depth),
 635    EXT(ARB_cull_distance),
 636    EXT(ARB_derivative_control),
 637    EXT(ARB_draw_buffers),
 638    EXT(ARB_draw_instanced),
 639    EXT(ARB_enhanced_layouts),
 640    EXT(ARB_explicit_attrib_location),
 641    EXT(ARB_explicit_uniform_location),
 642    EXT(ARB_fragment_coord_conventions),
 643    EXT(ARB_fragment_layer_viewport),
 644    EXT(ARB_fragment_shader_interlock),
 645    EXT(ARB_gpu_shader5),
 646    EXT(ARB_gpu_shader_fp64),
 647    EXT(ARB_gpu_shader_int64),
 648    EXT(ARB_post_depth_coverage),
 649    EXT(ARB_sample_shading),
 650    EXT(ARB_separate_shader_objects),
 651    EXT(ARB_shader_atomic_counter_ops),
 652    EXT(ARB_shader_atomic_counters),
 653    EXT(ARB_shader_ballot),
 654    EXT(ARB_shader_bit_encoding),
 655    EXT(ARB_shader_clock),
 656    EXT(ARB_shader_draw_parameters),
 657    EXT(ARB_shader_group_vote),
 658    EXT(ARB_shader_image_load_store),
 659    EXT(ARB_shader_image_size),
 660    EXT(ARB_shader_precision),
 661    EXT(ARB_shader_stencil_export),
 662    EXT(ARB_shader_storage_buffer_object),
 663    EXT(ARB_shader_subroutine),
 664    EXT(ARB_shader_texture_image_samples),
 665    EXT(ARB_shader_texture_lod),
 666    EXT(ARB_shader_viewport_layer_array),
 667    EXT(ARB_shading_language_420pack),
 668    EXT(ARB_shading_language_packing),
 669    EXT(ARB_tessellation_shader),
 670    EXT(ARB_texture_cube_map_array),
 671    EXT(ARB_texture_gather),
 672    EXT(ARB_texture_multisample),
 673    EXT(ARB_texture_query_levels),
 674    EXT(ARB_texture_query_lod),
 675    EXT(ARB_texture_rectangle),
 676    EXT(ARB_uniform_buffer_object),
 677    EXT(ARB_vertex_attrib_64bit),
 678    EXT(ARB_viewport_array),
 679
 680    /* KHR extensions go here, sorted alphabetically.
 681     */
 682    EXT_AEP(KHR_blend_equation_advanced),
 683
 684    /* OES extensions go here, sorted alphabetically.
 685     */
 686    EXT(OES_EGL_image_external),
 687    EXT(OES_EGL_image_external_essl3),
 688    EXT(OES_geometry_point_size),
 689    EXT(OES_geometry_shader),
 690    EXT(OES_gpu_shader5),
 691    EXT(OES_primitive_bounding_box),
 692    EXT_AEP(OES_sample_variables),
 693    EXT_AEP(OES_shader_image_atomic),
 694    EXT(OES_shader_io_blocks),
 695    EXT_AEP(OES_shader_multisample_interpolation),
 696    EXT(OES_standard_derivatives),
 697    EXT(OES_tessellation_point_size),
 698    EXT(OES_tessellation_shader),
 699    EXT(OES_texture_3D),
 700    EXT(OES_texture_buffer),
 701    EXT(OES_texture_cube_map_array),
 702    EXT_AEP(OES_texture_storage_multisample_2d_array),
 703    EXT(OES_viewport_array),
 704
 705    /* All other extensions go here, sorted alphabetically.
 706     */
 707    EXT(AMD_conservative_depth),
 708    EXT(AMD_gpu_shader_int64),
 709    EXT(AMD_shader_stencil_export),
 710    EXT(AMD_shader_trinary_minmax),
 711    EXT(AMD_texture_texture4),
 712    EXT(AMD_vertex_shader_layer),
 713    EXT(AMD_vertex_shader_viewport_index),
 714    EXT(ANDROID_extension_pack_es31a),
 715    EXT(EXT_blend_func_extended),
 716    EXT(EXT_frag_depth),
 717    EXT(EXT_draw_buffers),
 718    EXT(EXT_clip_cull_distance),
 719    EXT(EXT_geometry_point_size),
 720    EXT_AEP(EXT_geometry_shader),
 721    EXT(EXT_gpu_shader4),
 722    EXT_AEP(EXT_gpu_shader5),
 723    EXT_AEP(EXT_primitive_bounding_box),
 724    EXT(EXT_separate_shader_objects),
 725    EXT(EXT_shader_framebuffer_fetch),
 726    EXT(EXT_shader_framebuffer_fetch_non_coherent),
 727    EXT(EXT_shader_image_load_formatted),
 728    EXT(EXT_shader_image_load_store),
 729    EXT(EXT_shader_implicit_conversions),
 730    EXT(EXT_shader_integer_mix),
 731    EXT_AEP(EXT_shader_io_blocks),
 732    EXT(EXT_shader_samples_identical),
 733    EXT(EXT_tessellation_point_size),
 734    EXT_AEP(EXT_tessellation_shader),
 735    EXT(EXT_texture_array),
 736    EXT_AEP(EXT_texture_buffer),
 737    EXT_AEP(EXT_texture_cube_map_array),
 738    EXT(EXT_texture_query_lod),
 739    EXT(EXT_texture_shadow_lod),
 740    EXT(INTEL_conservative_rasterization),
 741    EXT(INTEL_shader_atomic_float_minmax),
 742    EXT(MESA_shader_integer_functions),
 743    EXT(NV_compute_shader_derivatives),
 744    EXT(NV_fragment_shader_interlock),
 745    EXT(NV_image_formats),
 746    EXT(NV_shader_atomic_float),
 747 };
 748
 749 #undef EXT
 750
 751
 752 /**
 753  * Determine whether a given extension is compatible with the target,
 754  * API, and extension information in the current parser state.
 755  */
 756 bool _mesa_glsl_extension::compatible_with_state(
 757       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 758 {
 759    return this->available_pred(state->ctx, api, gl_version);
 760 }
 761
 762 /**
 763  * Set the appropriate flags in the parser state to establish the
 764  * given behavior for this extension.
 765  */
 766 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 767                                      ext_behavior behavior) const
 768 {
 769    /* Note: the ->* operator indexes into state by the
 770     * offsets this->enable_flag and this->warn_flag.  See
 771     * _mesa_glsl_extension::supported_flag for more info.
 772     */
 773    state->*(this->enable_flag) = (behavior != extension_disable);
 774    state->*(this->warn_flag)   = (behavior == extension_warn);
 775 }
 776
 777 /**
 778  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 779  * the name is not found, return NULL.
 780  */
 781 static const _mesa_glsl_extension *find_extension(const char *name)
 782 {
 783    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 784       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 785          return &_mesa_glsl_supported_extensions[i];
 786       }
 787    }
 788    return NULL;
 789 }
 790
 791 bool
 792 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 793                              const char *behavior_string, YYLTYPE *behavior_locp,
 794                              _mesa_glsl_parse_state *state)
 795 {
 796    uint8_t gl_version = state->ctx->Extensions.Version;
 797    gl_api api = state->ctx->API;
 798    ext_behavior behavior;
 799    if (strcmp(behavior_string, "warn") == 0) {
 800       behavior = extension_warn;
 801    } else if (strcmp(behavior_string, "require") == 0) {
 802       behavior = extension_require;
 803    } else if (strcmp(behavior_string, "enable") == 0) {
 804       behavior = extension_enable;
 805    } else if (strcmp(behavior_string, "disable") == 0) {
 806       behavior = extension_disable;
 807    } else {
 808       _mesa_glsl_error(behavior_locp, state,
 809                        "unknown extension behavior `%s'",
 810                        behavior_string);
 811       return false;
 812    }
 813
 814    /* If we're in a desktop context but with an ES shader, use an ES API enum
 815     * to verify extension availability.
 816     */
 817    if (state->es_shader && api != API_OPENGLES2)
 818       api = API_OPENGLES2;
 819    /* Use the language-version derived GL version to extension checks, unless
 820     * we're using meta, which sets the version to the max.
 821     */
 822    if (gl_version != 0xff)
 823       gl_version = state->gl_version;
 824
 825    if (strcmp(name, "all") == 0) {
 826       if ((behavior == extension_enable) || (behavior == extension_require)) {
 827          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 828                           (behavior == extension_enable)
 829                           ? "enable" : "require");
 830          return false;
 831       } else {
 832          for (unsigned i = 0;
 833               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 834             const _mesa_glsl_extension *extension
 835                = &_mesa_glsl_supported_extensions[i];
 836             if (extension->compatible_with_state(state, api, gl_version)) {
 837                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 838             }
 839          }
 840       }
 841    } else {
 842       const _mesa_glsl_extension *extension = find_extension(name);
 843       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 844          extension->set_flags(state, behavior);
 845          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 846             for (unsigned i = 0;
 847                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 848                const _mesa_glsl_extension *extension =
 849                   &_mesa_glsl_supported_extensions[i];
 850
 851                if (!extension->aep)
 852                   continue;
 853                /* AEP should not be enabled if all of the sub-extensions can't
 854                 * also be enabled. This is not the proper layer to do such
 855                 * error-checking though.
 856                 */
 857                assert(extension->compatible_with_state(state, api, gl_version));
 858                extension->set_flags(state, behavior);
 859             }
 860          }
 861       } else {
 862          static const char fmt[] = "extension `%s' unsupported in %s shader";
 863
 864          if (behavior == extension_require) {
 865             _mesa_glsl_error(name_locp, state, fmt,
 866                              name, _mesa_shader_stage_to_string(state->stage));
 867             return false;
 868          } else {
 869             _mesa_glsl_warning(name_locp, state, fmt,
 870                                name, _mesa_shader_stage_to_string(state->stage));
 871          }
 872       }
 873    }
 874
 875    return true;
 876 }
 877
 878
 879 /**
 880  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 881  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 882  * (process_array_constructor, et al) sufficient information to do type
 883  * checking.
 884  *
 885  * Operates on assignments involving an aggregate initializer. E.g.,
 886  *
 887  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 888  *
 889  * or more ridiculously,
 890  *
 891  * struct S {
 892  *     vec4 v[2];
 893  * };
 894  *
 895  * struct {
 896  *     S a[2], b;
 897  *     int c;
 898  * } aggregate = {
 899  *     {
 900  *         {
 901  *             {
 902  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 903  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 904  *             } // a[0].v
 905  *         }, // a[0]
 906  *         {
 907  *             {
 908  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 909  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 910  *             } // a[1].v
 911  *         } // a[1]
 912  *     }, // a
 913  *     {
 914  *         {
 915  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 916  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 917  *         } // b.v
 918  *     }, // b
 919  *     4 // c
 920  * };
 921  *
 922  * This pass is necessary because the right-hand side of <type> e = { ... }
 923  * doesn't contain sufficient information to determine if the types match.
 924  */
 925 void
 926 _mesa_ast_set_aggregate_type(const glsl_type *type,
 927                              ast_expression *expr)
 928 {
 929    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 930    ai->constructor_type = type;
 931
 932    /* If the aggregate is an array, recursively set its elements' types. */
 933    if (type->is_array()) {
 934       /* Each array element has the type type->fields.array.
 935        *
 936        * E.g., if <type> if struct S[2] we want to set each element's type to
 937        * struct S.
 938        */
 939       for (exec_node *expr_node = ai->expressions.get_head_raw();
 940            !expr_node->is_tail_sentinel();
 941            expr_node = expr_node->next) {
 942          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 943                                                link);
 944
 945          if (expr->oper == ast_aggregate)
 946             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 947       }
 948
 949    /* If the aggregate is a struct, recursively set its fields' types. */
 950    } else if (type->is_struct()) {
 951       exec_node *expr_node = ai->expressions.get_head_raw();
 952
 953       /* Iterate through the struct's fields. */
 954       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 955            i++, expr_node = expr_node->next) {
 956          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 957                                                link);
 958
 959          if (expr->oper == ast_aggregate) {
 960             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 961          }
 962       }
 963    /* If the aggregate is a matrix, set its columns' types. */
 964    } else if (type->is_matrix()) {
 965       for (exec_node *expr_node = ai->expressions.get_head_raw();
 966            !expr_node->is_tail_sentinel();
 967            expr_node = expr_node->next) {
 968          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 969                                                link);
 970
 971          if (expr->oper == ast_aggregate)
 972             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 973       }
 974    }
 975 }
 976
 977 void
 978 _mesa_ast_process_interface_block(YYLTYPE *locp,
 979                                   _mesa_glsl_parse_state *state,
 980                                   ast_interface_block *const block,
 981                                   const struct ast_type_qualifier &q)
 982 {
 983    if (q.flags.q.buffer) {
 984       if (!state->has_shader_storage_buffer_objects()) {
 985          _mesa_glsl_error(locp, state,
 986                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 987                           "required for defining shader storage blocks");
 988       } else if (state->ARB_shader_storage_buffer_object_warn) {
 989          _mesa_glsl_warning(locp, state,
 990                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 991                             "required for defining shader storage blocks");
 992       }
 993    } else if (q.flags.q.uniform) {
 994       if (!state->has_uniform_buffer_objects()) {
 995          _mesa_glsl_error(locp, state,
 996                           "#version 140 / GL_ARB_uniform_buffer_object "
 997                           "required for defining uniform blocks");
 998       } else if (state->ARB_uniform_buffer_object_warn) {
 999          _mesa_glsl_warning(locp, state,
1000                             "#version 140 / GL_ARB_uniform_buffer_object "
1001                             "required for defining uniform blocks");
1002       }
1003    } else {
1004       if (!state->has_shader_io_blocks()) {
1005          if (state->es_shader) {
1006             _mesa_glsl_error(locp, state,
1007                              "GL_OES_shader_io_blocks or #version 320 "
1008                              "required for using interface blocks");
1009          } else {
1010             _mesa_glsl_error(locp, state,
1011                              "#version 150 required for using "
1012                              "interface blocks");
1013          }
1014       }
1015    }
1016
1017    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
1018     * "It is illegal to have an input block in a vertex shader
1019     *  or an output block in a fragment shader"
1020     */
1021    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
1022       _mesa_glsl_error(locp, state,
1023                        "`in' interface block is not allowed for "
1024                        "a vertex shader");
1025    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1026       _mesa_glsl_error(locp, state,
1027                        "`out' interface block is not allowed for "
1028                        "a fragment shader");
1029    }
1030
1031    /* Since block arrays require names, and both features are added in
1032     * the same language versions, we don't have to explicitly
1033     * version-check both things.
1034     */
1035    if (block->instance_name != NULL) {
1036       state->check_version(150, 300, locp, "interface blocks with "
1037                            "an instance name are not allowed");
1038    }
1039
1040    ast_type_qualifier::bitset_t interface_type_mask;
1041    struct ast_type_qualifier temp_type_qualifier;
1042
1043    /* Get a bitmask containing only the in/out/uniform/buffer
1044     * flags, allowing us to ignore other irrelevant flags like
1045     * interpolation qualifiers.
1046     */
1047    temp_type_qualifier.flags.i = 0;
1048    temp_type_qualifier.flags.q.uniform = true;
1049    temp_type_qualifier.flags.q.in = true;
1050    temp_type_qualifier.flags.q.out = true;
1051    temp_type_qualifier.flags.q.buffer = true;
1052    temp_type_qualifier.flags.q.patch = true;
1053    interface_type_mask = temp_type_qualifier.flags.i;
1054
1055    /* Get the block's interface qualifier.  The interface_qualifier
1056     * production rule guarantees that only one bit will be set (and
1057     * it will be in/out/uniform).
1058     */
1059    ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1060
1061    block->default_layout.flags.i |= block_interface_qualifier;
1062
1063    if (state->stage == MESA_SHADER_GEOMETRY &&
1064        state->has_explicit_attrib_stream() &&
1065        block->default_layout.flags.q.out) {
1066       /* Assign global layout's stream value. */
1067       block->default_layout.flags.q.stream = 1;
1068       block->default_layout.flags.q.explicit_stream = 0;
1069       block->default_layout.stream = state->out_qualifier->stream;
1070    }
1071
1072    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1073       /* Assign global layout's xfb_buffer value. */
1074       block->default_layout.flags.q.xfb_buffer = 1;
1075       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1076       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1077    }
1078
1079    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1080       ast_type_qualifier& qualifier = member->type->qualifier;
1081       if ((qualifier.flags.i & interface_type_mask) == 0) {
1082          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1083           * "If no optional qualifier is used in a member declaration, the
1084           *  qualifier of the variable is just in, out, or uniform as declared
1085           *  by interface-qualifier."
1086           */
1087          qualifier.flags.i |= block_interface_qualifier;
1088       } else if ((qualifier.flags.i & interface_type_mask) !=
1089                  block_interface_qualifier) {
1090          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1091           * "If optional qualifiers are used, they can include interpolation
1092           *  and storage qualifiers and they must declare an input, output,
1093           *  or uniform variable consistent with the interface qualifier of
1094           *  the block."
1095           */
1096          _mesa_glsl_error(locp, state,
1097                           "uniform/in/out qualifier on "
1098                           "interface block member does not match "
1099                           "the interface block");
1100       }
1101
1102       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1103          _mesa_glsl_error(locp, state,
1104                           "invariant qualifiers can be used only "
1105                           "in interface block members for shader "
1106                           "inputs or outputs");
1107    }
1108 }
1109
1110 static void
1111 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1112 {
1113    if (q->is_subroutine_decl())
1114       printf("subroutine ");
1115
1116    if (q->subroutine_list) {
1117       printf("subroutine (");
1118       q->subroutine_list->print();
1119       printf(")");
1120    }
1121
1122    if (q->flags.q.constant)
1123       printf("const ");
1124
1125    if (q->flags.q.invariant)
1126       printf("invariant ");
1127
1128    if (q->flags.q.attribute)
1129       printf("attribute ");
1130
1131    if (q->flags.q.varying)
1132       printf("varying ");
1133
1134    if (q->flags.q.in && q->flags.q.out)
1135       printf("inout ");
1136    else {
1137       if (q->flags.q.in)
1138          printf("in ");
1139
1140       if (q->flags.q.out)
1141          printf("out ");
1142    }
1143
1144    if (q->flags.q.centroid)
1145       printf("centroid ");
1146    if (q->flags.q.sample)
1147       printf("sample ");
1148    if (q->flags.q.patch)
1149       printf("patch ");
1150    if (q->flags.q.uniform)
1151       printf("uniform ");
1152    if (q->flags.q.buffer)
1153       printf("buffer ");
1154    if (q->flags.q.smooth)
1155       printf("smooth ");
1156    if (q->flags.q.flat)
1157       printf("flat ");
1158    if (q->flags.q.noperspective)
1159       printf("noperspective ");
1160 }
1161
1162
1163 void
1164 ast_node::print(void) const
1165 {
1166    printf("unhandled node ");
1167 }
1168
1169
1170 ast_node::ast_node(void)
1171 {
1172    this->location.source = 0;
1173    this->location.first_line = 0;
1174    this->location.first_column = 0;
1175    this->location.last_line = 0;
1176    this->location.last_column = 0;
1177 }
1178
1179
1180 static void
1181 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1182 {
1183    if (array_specifier)
1184       array_specifier->print();
1185 }
1186
1187
1188 void
1189 ast_compound_statement::print(void) const
1190 {
1191    printf("{\n");
1192
1193    foreach_list_typed(ast_node, ast, link, &this->statements) {
1194       ast->print();
1195    }
1196
1197    printf("}\n");
1198 }
1199
1200
1201 ast_compound_statement::ast_compound_statement(int new_scope,
1202                                                ast_node *statements)
1203 {
1204    this->new_scope = new_scope;
1205
1206    if (statements != NULL) {
1207       this->statements.push_degenerate_list_at_head(&statements->link);
1208    }
1209 }
1210
1211
1212 void
1213 ast_expression::print(void) const
1214 {
1215    switch (oper) {
1216    case ast_assign:
1217    case ast_mul_assign:
1218    case ast_div_assign:
1219    case ast_mod_assign:
1220    case ast_add_assign:
1221    case ast_sub_assign:
1222    case ast_ls_assign:
1223    case ast_rs_assign:
1224    case ast_and_assign:
1225    case ast_xor_assign:
1226    case ast_or_assign:
1227       subexpressions[0]->print();
1228       printf("%s ", operator_string(oper));
1229       subexpressions[1]->print();
1230       break;
1231
1232    case ast_field_selection:
1233       subexpressions[0]->print();
1234       printf(". %s ", primary_expression.identifier);
1235       break;
1236
1237    case ast_plus:
1238    case ast_neg:
1239    case ast_bit_not:
1240    case ast_logic_not:
1241    case ast_pre_inc:
1242    case ast_pre_dec:
1243       printf("%s ", operator_string(oper));
1244       subexpressions[0]->print();
1245       break;
1246
1247    case ast_post_inc:
1248    case ast_post_dec:
1249       subexpressions[0]->print();
1250       printf("%s ", operator_string(oper));
1251       break;
1252
1253    case ast_conditional:
1254       subexpressions[0]->print();
1255       printf("? ");
1256       subexpressions[1]->print();
1257       printf(": ");
1258       subexpressions[2]->print();
1259       break;
1260
1261    case ast_array_index:
1262       subexpressions[0]->print();
1263       printf("[ ");
1264       subexpressions[1]->print();
1265       printf("] ");
1266       break;
1267
1268    case ast_function_call: {
1269       subexpressions[0]->print();
1270       printf("( ");
1271
1272       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1273          if (&ast->link != this->expressions.get_head())
1274             printf(", ");
1275
1276          ast->print();
1277       }
1278
1279       printf(") ");
1280       break;
1281    }
1282
1283    case ast_identifier:
1284       printf("%s ", primary_expression.identifier);
1285       break;
1286
1287    case ast_int_constant:
1288       printf("%d ", primary_expression.int_constant);
1289       break;
1290
1291    case ast_uint_constant:
1292       printf("%u ", primary_expression.uint_constant);
1293       break;
1294
1295    case ast_float_constant:
1296       printf("%f ", primary_expression.float_constant);
1297       break;
1298
1299    case ast_double_constant:
1300       printf("%f ", primary_expression.double_constant);
1301       break;
1302
1303    case ast_int64_constant:
1304       printf("%" PRId64 " ", primary_expression.int64_constant);
1305       break;
1306
1307    case ast_uint64_constant:
1308       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1309       break;
1310
1311    case ast_bool_constant:
1312       printf("%s ",
1313              primary_expression.bool_constant
1314              ? "true" : "false");
1315       break;
1316
1317    case ast_sequence: {
1318       printf("( ");
1319       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1320          if (&ast->link != this->expressions.get_head())
1321             printf(", ");
1322
1323          ast->print();
1324       }
1325       printf(") ");
1326       break;
1327    }
1328
1329    case ast_aggregate: {
1330       printf("{ ");
1331       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1332          if (&ast->link != this->expressions.get_head())
1333             printf(", ");
1334
1335          ast->print();
1336       }
1337       printf("} ");
1338       break;
1339    }
1340
1341    default:
1342       assert(0);
1343       break;
1344    }
1345 }
1346
1347 ast_expression::ast_expression(int oper,
1348                                ast_expression *ex0,
1349                                ast_expression *ex1,
1350                                ast_expression *ex2) :
1351    primary_expression()
1352 {
1353    this->oper = ast_operators(oper);
1354    this->subexpressions[0] = ex0;
1355    this->subexpressions[1] = ex1;
1356    this->subexpressions[2] = ex2;
1357    this->non_lvalue_description = NULL;
1358    this->is_lhs = false;
1359 }
1360
1361
1362 void
1363 ast_expression_statement::print(void) const
1364 {
1365    if (expression)
1366       expression->print();
1367
1368    printf("; ");
1369 }
1370
1371
1372 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1373    expression(ex)
1374 {
1375    /* empty */
1376 }
1377
1378
1379 void
1380 ast_function::print(void) const
1381 {
1382    return_type->print();
1383    printf(" %s (", identifier);
1384
1385    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1386       ast->print();
1387    }
1388
1389    printf(")");
1390 }
1391
1392
1393 ast_function::ast_function(void)
1394    : return_type(NULL), identifier(NULL), is_definition(false),
1395      signature(NULL)
1396 {
1397    /* empty */
1398 }
1399
1400
1401 void
1402 ast_fully_specified_type::print(void) const
1403 {
1404    _mesa_ast_type_qualifier_print(& qualifier);
1405    specifier->print();
1406 }
1407
1408
1409 void
1410 ast_parameter_declarator::print(void) const
1411 {
1412    type->print();
1413    if (identifier)
1414       printf("%s ", identifier);
1415    ast_opt_array_dimensions_print(array_specifier);
1416 }
1417
1418
1419 void
1420 ast_function_definition::print(void) const
1421 {
1422    prototype->print();
1423    body->print();
1424 }
1425
1426
1427 void
1428 ast_declaration::print(void) const
1429 {
1430    printf("%s ", identifier);
1431    ast_opt_array_dimensions_print(array_specifier);
1432
1433    if (initializer) {
1434       printf("= ");
1435       initializer->print();
1436    }
1437 }
1438
1439
1440 ast_declaration::ast_declaration(const char *identifier,
1441                                  ast_array_specifier *array_specifier,
1442                                  ast_expression *initializer)
1443 {
1444    this->identifier = identifier;
1445    this->array_specifier = array_specifier;
1446    this->initializer = initializer;
1447 }
1448
1449
1450 void
1451 ast_declarator_list::print(void) const
1452 {
1453    assert(type || invariant);
1454
1455    if (type)
1456       type->print();
1457    else if (invariant)
1458       printf("invariant ");
1459    else
1460       printf("precise ");
1461
1462    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1463       if (&ast->link != this->declarations.get_head())
1464          printf(", ");
1465
1466       ast->print();
1467    }
1468
1469    printf("; ");
1470 }
1471
1472
1473 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1474 {
1475    this->type = type;
1476    this->invariant = false;
1477    this->precise = false;
1478 }
1479
1480 void
1481 ast_jump_statement::print(void) const
1482 {
1483    switch (mode) {
1484    case ast_continue:
1485       printf("continue; ");
1486       break;
1487    case ast_break:
1488       printf("break; ");
1489       break;
1490    case ast_return:
1491       printf("return ");
1492       if (opt_return_value)
1493          opt_return_value->print();
1494
1495       printf("; ");
1496       break;
1497    case ast_discard:
1498       printf("discard; ");
1499       break;
1500    }
1501 }
1502
1503
1504 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1505    : opt_return_value(NULL)
1506 {
1507    this->mode = ast_jump_modes(mode);
1508
1509    if (mode == ast_return)
1510       opt_return_value = return_value;
1511 }
1512
1513
1514 void
1515 ast_selection_statement::print(void) const
1516 {
1517    printf("if ( ");
1518    condition->print();
1519    printf(") ");
1520
1521    then_statement->print();
1522
1523    if (else_statement) {
1524       printf("else ");
1525       else_statement->print();
1526    }
1527 }
1528
1529
1530 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1531                                                  ast_node *then_statement,
1532                                                  ast_node *else_statement)
1533 {
1534    this->condition = condition;
1535    this->then_statement = then_statement;
1536    this->else_statement = else_statement;
1537 }
1538
1539
1540 void
1541 ast_switch_statement::print(void) const
1542 {
1543    printf("switch ( ");
1544    test_expression->print();
1545    printf(") ");
1546
1547    body->print();
1548 }
1549
1550
1551 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1552                                            ast_node *body)
1553 {
1554    this->test_expression = test_expression;
1555    this->body = body;
1556 }
1557
1558
1559 void
1560 ast_switch_body::print(void) const
1561 {
1562    printf("{\n");
1563    if (stmts != NULL) {
1564       stmts->print();
1565    }
1566    printf("}\n");
1567 }
1568
1569
1570 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1571 {
1572    this->stmts = stmts;
1573 }
1574
1575
1576 void ast_case_label::print(void) const
1577 {
1578    if (test_value != NULL) {
1579       printf("case ");
1580       test_value->print();
1581       printf(": ");
1582    } else {
1583       printf("default: ");
1584    }
1585 }
1586
1587
1588 ast_case_label::ast_case_label(ast_expression *test_value)
1589 {
1590    this->test_value = test_value;
1591 }
1592
1593
1594 void ast_case_label_list::print(void) const
1595 {
1596    foreach_list_typed(ast_node, ast, link, & this->labels) {
1597       ast->print();
1598    }
1599    printf("\n");
1600 }
1601
1602
1603 ast_case_label_list::ast_case_label_list(void)
1604 {
1605 }
1606
1607
1608 void ast_case_statement::print(void) const
1609 {
1610    labels->print();
1611    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1612       ast->print();
1613       printf("\n");
1614    }
1615 }
1616
1617
1618 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1619 {
1620    this->labels = labels;
1621 }
1622
1623
1624 void ast_case_statement_list::print(void) const
1625 {
1626    foreach_list_typed(ast_node, ast, link, & this->cases) {
1627       ast->print();
1628    }
1629 }
1630
1631
1632 ast_case_statement_list::ast_case_statement_list(void)
1633 {
1634 }
1635
1636
1637 void
1638 ast_iteration_statement::print(void) const
1639 {
1640    switch (mode) {
1641    case ast_for:
1642       printf("for( ");
1643       if (init_statement)
1644          init_statement->print();
1645       printf("; ");
1646
1647       if (condition)
1648          condition->print();
1649       printf("; ");
1650
1651       if (rest_expression)
1652          rest_expression->print();
1653       printf(") ");
1654
1655       body->print();
1656       break;
1657
1658    case ast_while:
1659       printf("while ( ");
1660       if (condition)
1661          condition->print();
1662       printf(") ");
1663       body->print();
1664       break;
1665
1666    case ast_do_while:
1667       printf("do ");
1668       body->print();
1669       printf("while ( ");
1670       if (condition)
1671          condition->print();
1672       printf("); ");
1673       break;
1674    }
1675 }
1676
1677
1678 ast_iteration_statement::ast_iteration_statement(int mode,
1679                                                  ast_node *init,
1680                                                  ast_node *condition,
1681                                                  ast_expression *rest_expression,
1682                                                  ast_node *body)
1683 {
1684    this->mode = ast_iteration_modes(mode);
1685    this->init_statement = init;
1686    this->condition = condition;
1687    this->rest_expression = rest_expression;
1688    this->body = body;
1689 }
1690
1691
1692 void
1693 ast_struct_specifier::print(void) const
1694 {
1695    printf("struct %s { ", name);
1696    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1697       ast->print();
1698    }
1699    printf("} ");
1700 }
1701
1702
1703 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1704                                            ast_declarator_list *declarator_list)
1705    : name(identifier), layout(NULL), declarations(), is_declaration(true),
1706      type(NULL)
1707 {
1708    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1709 }
1710
1711 void ast_subroutine_list::print(void) const
1712 {
1713    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1714       if (&ast->link != this->declarations.get_head())
1715          printf(", ");
1716       ast->print();
1717    }
1718 }
1719
1720 static void
1721 set_shader_inout_layout(struct gl_shader *shader,
1722                      struct _mesa_glsl_parse_state *state)
1723 {
1724    /* Should have been prevented by the parser. */
1725    if (shader->Stage != MESA_SHADER_GEOMETRY &&
1726        shader->Stage != MESA_SHADER_TESS_EVAL &&
1727        shader->Stage != MESA_SHADER_COMPUTE) {
1728       assert(!state->in_qualifier->flags.i);
1729    }
1730
1731    if (shader->Stage != MESA_SHADER_COMPUTE) {
1732       /* Should have been prevented by the parser. */
1733       assert(!state->cs_input_local_size_specified);
1734       assert(!state->cs_input_local_size_variable_specified);
1735       assert(state->cs_derivative_group == DERIVATIVE_GROUP_NONE);
1736    }
1737
1738    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1739       /* Should have been prevented by the parser. */
1740       assert(!state->fs_uses_gl_fragcoord);
1741       assert(!state->fs_redeclares_gl_fragcoord);
1742       assert(!state->fs_pixel_center_integer);
1743       assert(!state->fs_origin_upper_left);
1744       assert(!state->fs_early_fragment_tests);
1745       assert(!state->fs_inner_coverage);
1746       assert(!state->fs_post_depth_coverage);
1747       assert(!state->fs_pixel_interlock_ordered);
1748       assert(!state->fs_pixel_interlock_unordered);
1749       assert(!state->fs_sample_interlock_ordered);
1750       assert(!state->fs_sample_interlock_unordered);
1751    }
1752
1753    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1754       if (state->out_qualifier->out_xfb_stride[i]) {
1755          unsigned xfb_stride;
1756          if (state->out_qualifier->out_xfb_stride[i]->
1757                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1758                 true)) {
1759             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1760          }
1761       }
1762    }
1763
1764    switch (shader->Stage) {
1765    case MESA_SHADER_TESS_CTRL:
1766       shader->info.TessCtrl.VerticesOut = 0;
1767       if (state->tcs_output_vertices_specified) {
1768          unsigned vertices;
1769          if (state->out_qualifier->vertices->
1770                process_qualifier_constant(state, "vertices", &vertices,
1771                                           false)) {
1772
1773             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1774             if (vertices > state->Const.MaxPatchVertices) {
1775                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1776                                 "GL_MAX_PATCH_VERTICES", vertices);
1777             }
1778             shader->info.TessCtrl.VerticesOut = vertices;
1779          }
1780       }
1781       break;
1782    case MESA_SHADER_TESS_EVAL:
1783       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1784       if (state->in_qualifier->flags.q.prim_type)
1785          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1786
1787       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1788       if (state->in_qualifier->flags.q.vertex_spacing)
1789          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1790
1791       shader->info.TessEval.VertexOrder = 0;
1792       if (state->in_qualifier->flags.q.ordering)
1793          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1794
1795       shader->info.TessEval.PointMode = -1;
1796       if (state->in_qualifier->flags.q.point_mode)
1797          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1798       break;
1799    case MESA_SHADER_GEOMETRY:
1800       shader->info.Geom.VerticesOut = -1;
1801       if (state->out_qualifier->flags.q.max_vertices) {
1802          unsigned qual_max_vertices;
1803          if (state->out_qualifier->max_vertices->
1804                process_qualifier_constant(state, "max_vertices",
1805                                           &qual_max_vertices, true)) {
1806
1807             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1808                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1809                _mesa_glsl_error(&loc, state,
1810                                 "maximum output vertices (%d) exceeds "
1811                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1812                                 qual_max_vertices);
1813             }
1814             shader->info.Geom.VerticesOut = qual_max_vertices;
1815          }
1816       }
1817
1818       if (state->gs_input_prim_type_specified) {
1819          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1820       } else {
1821          shader->info.Geom.InputType = PRIM_UNKNOWN;
1822       }
1823
1824       if (state->out_qualifier->flags.q.prim_type) {
1825          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1826       } else {
1827          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1828       }
1829
1830       shader->info.Geom.Invocations = 0;
1831       if (state->in_qualifier->flags.q.invocations) {
1832          unsigned invocations;
1833          if (state->in_qualifier->invocations->
1834                process_qualifier_constant(state, "invocations",
1835                                           &invocations, false)) {
1836
1837             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1838             if (invocations > state->Const.MaxGeometryShaderInvocations) {
1839                _mesa_glsl_error(&loc, state,
1840                                 "invocations (%d) exceeds "
1841                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1842                                 invocations);
1843             }
1844             shader->info.Geom.Invocations = invocations;
1845          }
1846       }
1847       break;
1848
1849    case MESA_SHADER_COMPUTE:
1850       if (state->cs_input_local_size_specified) {
1851          for (int i = 0; i < 3; i++)
1852             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1853       } else {
1854          for (int i = 0; i < 3; i++)
1855             shader->info.Comp.LocalSize[i] = 0;
1856       }
1857
1858       shader->info.Comp.LocalSizeVariable =
1859          state->cs_input_local_size_variable_specified;
1860
1861       shader->info.Comp.DerivativeGroup = state->cs_derivative_group;
1862
1863       if (state->NV_compute_shader_derivatives_enable) {
1864          /* We allow multiple cs_input_layout nodes, but do not store them in
1865           * a convenient place, so for now live with an empty location error.
1866           */
1867          YYLTYPE loc = {0};
1868          if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_QUADS) {
1869             if (shader->info.Comp.LocalSize[0] % 2 != 0) {
1870                _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1871                                 "local group size whose first dimension "
1872                                 "is a multiple of 2\n");
1873             }
1874             if (shader->info.Comp.LocalSize[1] % 2 != 0) {
1875                _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1876                                 "local group size whose second dimension "
1877                                 "is a multiple of 2\n");
1878             }
1879          } else if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_LINEAR) {
1880             if ((shader->info.Comp.LocalSize[0] *
1881                  shader->info.Comp.LocalSize[1] *
1882                  shader->info.Comp.LocalSize[2]) % 4 != 0) {
1883                _mesa_glsl_error(&loc, state, "derivative_group_linearNV must be used with a "
1884                             "local group size whose total number of invocations "
1885                             "is a multiple of 4\n");
1886             }
1887          }
1888       }
1889
1890       break;
1891
1892    case MESA_SHADER_FRAGMENT:
1893       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1894       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1895       shader->pixel_center_integer = state->fs_pixel_center_integer;
1896       shader->origin_upper_left = state->fs_origin_upper_left;
1897       shader->ARB_fragment_coord_conventions_enable =
1898          state->ARB_fragment_coord_conventions_enable;
1899       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1900       shader->InnerCoverage = state->fs_inner_coverage;
1901       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1902       shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
1903       shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
1904       shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
1905       shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
1906       shader->BlendSupport = state->fs_blend_support;
1907       break;
1908
1909    default:
1910       /* Nothing to do. */
1911       break;
1912    }
1913
1914    shader->bindless_sampler = state->bindless_sampler_specified;
1915    shader->bindless_image = state->bindless_image_specified;
1916    shader->bound_sampler = state->bound_sampler_specified;
1917    shader->bound_image = state->bound_image_specified;
1918 }
1919
1920 /* src can be NULL if only the symbols found in the exec_list should be
1921  * copied
1922  */
1923 void
1924 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1925                                    struct glsl_symbol_table *src,
1926                                    struct glsl_symbol_table *dest)
1927 {
1928    foreach_in_list (ir_instruction, ir, shader_ir) {
1929       switch (ir->ir_type) {
1930       case ir_type_function:
1931          dest->add_function((ir_function *) ir);
1932          break;
1933       case ir_type_variable: {
1934          ir_variable *const var = (ir_variable *) ir;
1935
1936          if (var->data.mode != ir_var_temporary)
1937             dest->add_variable(var);
1938          break;
1939       }
1940       default:
1941          break;
1942       }
1943    }
1944
1945    if (src != NULL) {
1946       /* Explicitly copy the gl_PerVertex interface definitions because these
1947        * are needed to check they are the same during the interstage link.
1948        * They can’t necessarily be found via the exec_list because the members
1949        * might not be referenced. The GL spec still requires that they match
1950        * in that case.
1951        */
1952       const glsl_type *iface =
1953          src->get_interface("gl_PerVertex", ir_var_shader_in);
1954       if (iface)
1955          dest->add_interface(iface->name, iface, ir_var_shader_in);
1956
1957       iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1958       if (iface)
1959          dest->add_interface(iface->name, iface, ir_var_shader_out);
1960    }
1961 }
1962
1963 extern "C" {
1964
1965 static void
1966 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1967 {
1968    int j, k;
1969    int index = 0;
1970
1971    for (j = 0; j < state->num_subroutines; j++) {
1972       while (state->subroutines[j]->subroutine_index == -1) {
1973          for (k = 0; k < state->num_subroutines; k++) {
1974             if (state->subroutines[k]->subroutine_index == index)
1975                break;
1976             else if (k == state->num_subroutines - 1) {
1977                state->subroutines[j]->subroutine_index = index;
1978             }
1979          }
1980          index++;
1981       }
1982    }
1983 }
1984
1985 static void
1986 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1987                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1988                     struct glcpp_parser *data,
1989                     unsigned version,
1990                     bool es)
1991 {
1992    unsigned gl_version = state->ctx->Extensions.Version;
1993    gl_api api = state->ctx->API;
1994
1995    if (gl_version != 0xff) {
1996       unsigned i;
1997       for (i = 0; i < state->num_supported_versions; i++) {
1998          if (state->supported_versions[i].ver == version &&
1999              state->supported_versions[i].es == es) {
2000             gl_version = state->supported_versions[i].gl_ver;
2001             break;
2002          }
2003       }
2004
2005       if (i == state->num_supported_versions)
2006          return;
2007    }
2008
2009    if (es)
2010       api = API_OPENGLES2;
2011
2012    for (unsigned i = 0;
2013         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
2014       const _mesa_glsl_extension *extension
2015          = &_mesa_glsl_supported_extensions[i];
2016       if (extension->compatible_with_state(state, api, gl_version)) {
2017          add_builtin_define(data, extension->name, 1);
2018       }
2019    }
2020 }
2021
2022 /* Implements parsing checks that we can't do during parsing */
2023 static void
2024 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
2025 {
2026    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
2027       YYLTYPE loc;
2028       memset(&loc, 0, sizeof(loc));
2029       _mesa_glsl_error(&loc, state, "Compute shaders require "
2030                        "GLSL 4.30 or GLSL ES 3.10");
2031    }
2032 }
2033
2034 static void
2035 opt_shader_and_create_symbol_table(struct gl_context *ctx,
2036                                    struct glsl_symbol_table *source_symbols,
2037                                    struct gl_shader *shader)
2038 {
2039    assert(shader->CompileStatus != COMPILE_FAILURE &&
2040           !shader->ir->is_empty());
2041
2042    struct gl_shader_compiler_options *options =
2043       &ctx->Const.ShaderCompilerOptions[shader->Stage];
2044
2045    /* Do some optimization at compile time to reduce shader IR size
2046     * and reduce later work if the same shader is linked multiple times
2047     */
2048    if (ctx->Const.GLSLOptimizeConservatively) {
2049       /* Run it just once. */
2050       do_common_optimization(shader->ir, false, false, options,
2051                              ctx->Const.NativeIntegers);
2052    } else {
2053       /* Repeat it until it stops making changes. */
2054       while (do_common_optimization(shader->ir, false, false, options,
2055                                     ctx->Const.NativeIntegers))
2056          ;
2057    }
2058
2059    validate_ir_tree(shader->ir);
2060
2061    enum ir_variable_mode other;
2062    switch (shader->Stage) {
2063    case MESA_SHADER_VERTEX:
2064       other = ir_var_shader_in;
2065       break;
2066    case MESA_SHADER_FRAGMENT:
2067       other = ir_var_shader_out;
2068       break;
2069    default:
2070       /* Something invalid to ensure optimize_dead_builtin_uniforms
2071        * doesn't remove anything other than uniforms or constants.
2072        */
2073       other = ir_var_mode_count;
2074       break;
2075    }
2076
2077    optimize_dead_builtin_variables(shader->ir, other);
2078
2079    validate_ir_tree(shader->ir);
2080
2081    /* Retain any live IR, but trash the rest. */
2082    reparent_ir(shader->ir, shader->ir);
2083
2084    /* Destroy the symbol table.  Create a new symbol table that contains only
2085     * the variables and functions that still exist in the IR.  The symbol
2086     * table will be used later during linking.
2087     *
2088     * There must NOT be any freed objects still referenced by the symbol
2089     * table.  That could cause the linker to dereference freed memory.
2090     *
2091     * We don't have to worry about types or interface-types here because those
2092     * are fly-weights that are looked up by glsl_type.
2093     */
2094    _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2095                                       shader->symbols);
2096 }
2097
2098 void
2099 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2100                           bool dump_ast, bool dump_hir, bool force_recompile)
2101 {
2102    const char *source = force_recompile && shader->FallbackSource ?
2103       shader->FallbackSource : shader->Source;
2104
2105    if (!force_recompile) {
2106       if (ctx->Cache) {
2107          char buf[41];
2108          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2109                                 shader->sha1);
2110          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2111             /* We've seen this shader before and know it compiles */
2112             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2113                _mesa_sha1_format(buf, shader->sha1);
2114                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2115             }
2116             shader->CompileStatus = COMPILE_SKIPPED;
2117
2118             free((void *)shader->FallbackSource);
2119             shader->FallbackSource = NULL;
2120             return;
2121          }
2122       }
2123    } else {
2124       /* We should only ever end up here if a re-compile has been forced by a
2125        * shader cache miss. In which case we can skip the compile if its
2126        * already be done by a previous fallback or the initial compile call.
2127        */
2128       if (shader->CompileStatus == COMPILE_SUCCESS)
2129          return;
2130    }
2131
2132    struct _mesa_glsl_parse_state *state =
2133       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2134
2135    if (ctx->Const.GenerateTemporaryNames)
2136       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2137                               false, true);
2138
2139    state->error = glcpp_preprocess(state, &source, &state->info_log,
2140                                    add_builtin_defines, state, ctx);
2141
2142    if (!state->error) {
2143      _mesa_glsl_lexer_ctor(state, source);
2144      _mesa_glsl_parse(state);
2145      _mesa_glsl_lexer_dtor(state);
2146      do_late_parsing_checks(state);
2147    }
2148
2149    if (dump_ast) {
2150       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2151          ast->print();
2152       }
2153       printf("\n\n");
2154    }
2155
2156    ralloc_free(shader->ir);
2157    shader->ir = new(shader) exec_list;
2158    if (!state->error && !state->translation_unit.is_empty())
2159       _mesa_ast_to_hir(shader->ir, state);
2160
2161    if (!state->error) {
2162       validate_ir_tree(shader->ir);
2163
2164       /* Print out the unoptimized IR. */
2165       if (dump_hir) {
2166          _mesa_print_ir(stdout, shader->ir, state);
2167       }
2168    }
2169
2170    if (shader->InfoLog)
2171       ralloc_free(shader->InfoLog);
2172
2173    if (!state->error)
2174       set_shader_inout_layout(shader, state);
2175
2176    shader->symbols = new(shader->ir) glsl_symbol_table;
2177    shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2178    shader->InfoLog = state->info_log;
2179    shader->Version = state->language_version;
2180    shader->IsES = state->es_shader;
2181
2182    if (!state->error && !shader->ir->is_empty()) {
2183       assign_subroutine_indexes(state);
2184       lower_subroutine(shader->ir, state);
2185       opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2186    }
2187
2188    if (!force_recompile) {
2189       free((void *)shader->FallbackSource);
2190       shader->FallbackSource = NULL;
2191    }
2192
2193    delete state->symbols;
2194    ralloc_free(state);
2195
2196    if (ctx->Cache && shader->CompileStatus == COMPILE_SUCCESS) {
2197       char sha1_buf[41];
2198       disk_cache_put_key(ctx->Cache, shader->sha1);
2199       if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2200          _mesa_sha1_format(sha1_buf, shader->sha1);
2201          fprintf(stderr, "marking shader: %s\n", sha1_buf);
2202       }
2203    }
2204 }
2205
2206 } /* extern "C" */
2207 /**
2208  * Do the set of common optimizations passes
2209  *
2210  * \param ir                          List of instructions to be optimized
2211  * \param linked                      Is the shader linked?  This enables
2212  *                                    optimizations passes that remove code at
2213  *                                    global scope and could cause linking to
2214  *                                    fail.
2215  * \param uniform_locations_assigned  Have locations already been assigned for
2216  *                                    uniforms?  This prevents the declarations
2217  *                                    of unused uniforms from being removed.
2218  *                                    The setting of this flag only matters if
2219  *                                    \c linked is \c true.
2220  * \param options                     The driver's preferred shader options.
2221  * \param native_integers             Selects optimizations that depend on the
2222  *                                    implementations supporting integers
2223  *                                    natively (as opposed to supporting
2224  *                                    integers in floating point registers).
2225  */
2226 bool
2227 do_common_optimization(exec_list *ir, bool linked,
2228                        bool uniform_locations_assigned,
2229                        const struct gl_shader_compiler_options *options,
2230                        bool native_integers)
2231 {
2232    const bool debug = false;
2233    bool progress = false;
2234
2235 #define OPT(PASS, ...) do {                                             \
2236       if (debug) {                                                      \
2237          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2238          const bool opt_progress = PASS(__VA_ARGS__);                   \
2239          progress = opt_progress || progress;                           \
2240          if (opt_progress)                                              \
2241             _mesa_print_ir(stderr, ir, NULL);                           \
2242          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2243                  #PASS, opt_progress ? "made" : "no");                  \
2244       } else {                                                          \
2245          progress = PASS(__VA_ARGS__) || progress;                      \
2246       }                                                                 \
2247    } while (false)
2248
2249    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2250
2251    if (linked) {
2252       OPT(do_function_inlining, ir);
2253       OPT(do_dead_functions, ir);
2254       OPT(do_structure_splitting, ir);
2255    }
2256    propagate_invariance(ir);
2257    OPT(do_if_simplification, ir);
2258    OPT(opt_flatten_nested_if_blocks, ir);
2259    OPT(opt_conditional_discard, ir);
2260    OPT(do_copy_propagation_elements, ir);
2261
2262    if (options->OptimizeForAOS && !linked)
2263       OPT(opt_flip_matrices, ir);
2264
2265    if (linked && options->OptimizeForAOS) {
2266       OPT(do_vectorize, ir);
2267    }
2268
2269    if (linked)
2270       OPT(do_dead_code, ir, uniform_locations_assigned);
2271    else
2272       OPT(do_dead_code_unlinked, ir);
2273    OPT(do_dead_code_local, ir);
2274    OPT(do_tree_grafting, ir);
2275    OPT(do_constant_propagation, ir);
2276    if (linked)
2277       OPT(do_constant_variable, ir);
2278    else
2279       OPT(do_constant_variable_unlinked, ir);
2280    OPT(do_constant_folding, ir);
2281    OPT(do_minmax_prune, ir);
2282    OPT(do_rebalance_tree, ir);
2283    OPT(do_algebraic, ir, native_integers, options);
2284    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2285        options->EmitNoCont, options->EmitNoLoops);
2286    OPT(do_vec_index_to_swizzle, ir);
2287    OPT(lower_vector_insert, ir, false);
2288    OPT(optimize_swizzles, ir);
2289
2290    OPT(optimize_split_arrays, ir, linked);
2291    OPT(optimize_redundant_jumps, ir);
2292
2293    if (options->MaxUnrollIterations) {
2294       loop_state *ls = analyze_loop_variables(ir);
2295       if (ls->loop_found) {
2296          bool loop_progress = unroll_loops(ir, ls, options);
2297          while (loop_progress) {
2298             loop_progress = false;
2299             loop_progress |= do_constant_propagation(ir);
2300             loop_progress |= do_if_simplification(ir);
2301
2302             /* Some drivers only call do_common_optimization() once rather
2303              * than in a loop. So we must call do_lower_jumps() after
2304              * unrolling a loop because for drivers that use LLVM validation
2305              * will fail if a jump is not the last instruction in the block.
2306              * For example the following will fail LLVM validation:
2307              *
2308              *   (loop (
2309              *      ...
2310              *   break
2311              *   (assign  (x) (var_ref v124)  (expression int + (var_ref v124)
2312              *      (constant int (1)) ) )
2313              *   ))
2314              */
2315             loop_progress |= do_lower_jumps(ir, true, true,
2316                                             options->EmitNoMainReturn,
2317                                             options->EmitNoCont,
2318                                             options->EmitNoLoops);
2319          }
2320          progress |= loop_progress;
2321       }
2322       delete ls;
2323    }
2324
2325 #undef OPT
2326
2327    return progress;
2328 }