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_demote_to_helper_invocation),
 717    EXT(EXT_frag_depth),
 718    EXT(EXT_draw_buffers),
 719    EXT(EXT_clip_cull_distance),
 720    EXT(EXT_geometry_point_size),
 721    EXT_AEP(EXT_geometry_shader),
 722    EXT(EXT_gpu_shader4),
 723    EXT_AEP(EXT_gpu_shader5),
 724    EXT_AEP(EXT_primitive_bounding_box),
 725    EXT(EXT_separate_shader_objects),
 726    EXT(EXT_shader_framebuffer_fetch),
 727    EXT(EXT_shader_framebuffer_fetch_non_coherent),
 728    EXT(EXT_shader_image_load_formatted),
 729    EXT(EXT_shader_image_load_store),
 730    EXT(EXT_shader_implicit_conversions),
 731    EXT(EXT_shader_integer_mix),
 732    EXT_AEP(EXT_shader_io_blocks),
 733    EXT(EXT_shader_samples_identical),
 734    EXT(EXT_tessellation_point_size),
 735    EXT_AEP(EXT_tessellation_shader),
 736    EXT(EXT_texture_array),
 737    EXT_AEP(EXT_texture_buffer),
 738    EXT_AEP(EXT_texture_cube_map_array),
 739    EXT(EXT_texture_query_lod),
 740    EXT(EXT_texture_shadow_lod),
 741    EXT(INTEL_conservative_rasterization),
 742    EXT(INTEL_shader_atomic_float_minmax),
 743    EXT(MESA_shader_integer_functions),
 744    EXT(NV_compute_shader_derivatives),
 745    EXT(NV_fragment_shader_interlock),
 746    EXT(NV_image_formats),
 747    EXT(NV_shader_atomic_float),
 748 };
 749
 750 #undef EXT
 751
 752
 753 /**
 754  * Determine whether a given extension is compatible with the target,
 755  * API, and extension information in the current parser state.
 756  */
 757 bool _mesa_glsl_extension::compatible_with_state(
 758       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 759 {
 760    return this->available_pred(state->ctx, api, gl_version);
 761 }
 762
 763 /**
 764  * Set the appropriate flags in the parser state to establish the
 765  * given behavior for this extension.
 766  */
 767 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 768                                      ext_behavior behavior) const
 769 {
 770    /* Note: the ->* operator indexes into state by the
 771     * offsets this->enable_flag and this->warn_flag.  See
 772     * _mesa_glsl_extension::supported_flag for more info.
 773     */
 774    state->*(this->enable_flag) = (behavior != extension_disable);
 775    state->*(this->warn_flag)   = (behavior == extension_warn);
 776 }
 777
 778 /**
 779  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 780  * the name is not found, return NULL.
 781  */
 782 static const _mesa_glsl_extension *find_extension(const char *name)
 783 {
 784    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 785       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 786          return &_mesa_glsl_supported_extensions[i];
 787       }
 788    }
 789    return NULL;
 790 }
 791
 792 bool
 793 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 794                              const char *behavior_string, YYLTYPE *behavior_locp,
 795                              _mesa_glsl_parse_state *state)
 796 {
 797    uint8_t gl_version = state->ctx->Extensions.Version;
 798    gl_api api = state->ctx->API;
 799    ext_behavior behavior;
 800    if (strcmp(behavior_string, "warn") == 0) {
 801       behavior = extension_warn;
 802    } else if (strcmp(behavior_string, "require") == 0) {
 803       behavior = extension_require;
 804    } else if (strcmp(behavior_string, "enable") == 0) {
 805       behavior = extension_enable;
 806    } else if (strcmp(behavior_string, "disable") == 0) {
 807       behavior = extension_disable;
 808    } else {
 809       _mesa_glsl_error(behavior_locp, state,
 810                        "unknown extension behavior `%s'",
 811                        behavior_string);
 812       return false;
 813    }
 814
 815    /* If we're in a desktop context but with an ES shader, use an ES API enum
 816     * to verify extension availability.
 817     */
 818    if (state->es_shader && api != API_OPENGLES2)
 819       api = API_OPENGLES2;
 820    /* Use the language-version derived GL version to extension checks, unless
 821     * we're using meta, which sets the version to the max.
 822     */
 823    if (gl_version != 0xff)
 824       gl_version = state->gl_version;
 825
 826    if (strcmp(name, "all") == 0) {
 827       if ((behavior == extension_enable) || (behavior == extension_require)) {
 828          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 829                           (behavior == extension_enable)
 830                           ? "enable" : "require");
 831          return false;
 832       } else {
 833          for (unsigned i = 0;
 834               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 835             const _mesa_glsl_extension *extension
 836                = &_mesa_glsl_supported_extensions[i];
 837             if (extension->compatible_with_state(state, api, gl_version)) {
 838                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 839             }
 840          }
 841       }
 842    } else {
 843       const _mesa_glsl_extension *extension = find_extension(name);
 844       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 845          extension->set_flags(state, behavior);
 846          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 847             for (unsigned i = 0;
 848                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 849                const _mesa_glsl_extension *extension =
 850                   &_mesa_glsl_supported_extensions[i];
 851
 852                if (!extension->aep)
 853                   continue;
 854                /* AEP should not be enabled if all of the sub-extensions can't
 855                 * also be enabled. This is not the proper layer to do such
 856                 * error-checking though.
 857                 */
 858                assert(extension->compatible_with_state(state, api, gl_version));
 859                extension->set_flags(state, behavior);
 860             }
 861          }
 862       } else {
 863          static const char fmt[] = "extension `%s' unsupported in %s shader";
 864
 865          if (behavior == extension_require) {
 866             _mesa_glsl_error(name_locp, state, fmt,
 867                              name, _mesa_shader_stage_to_string(state->stage));
 868             return false;
 869          } else {
 870             _mesa_glsl_warning(name_locp, state, fmt,
 871                                name, _mesa_shader_stage_to_string(state->stage));
 872          }
 873       }
 874    }
 875
 876    return true;
 877 }
 878
 879
 880 /**
 881  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 882  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 883  * (process_array_constructor, et al) sufficient information to do type
 884  * checking.
 885  *
 886  * Operates on assignments involving an aggregate initializer. E.g.,
 887  *
 888  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 889  *
 890  * or more ridiculously,
 891  *
 892  * struct S {
 893  *     vec4 v[2];
 894  * };
 895  *
 896  * struct {
 897  *     S a[2], b;
 898  *     int c;
 899  * } aggregate = {
 900  *     {
 901  *         {
 902  *             {
 903  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 904  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 905  *             } // a[0].v
 906  *         }, // a[0]
 907  *         {
 908  *             {
 909  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 910  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 911  *             } // a[1].v
 912  *         } // a[1]
 913  *     }, // a
 914  *     {
 915  *         {
 916  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 917  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 918  *         } // b.v
 919  *     }, // b
 920  *     4 // c
 921  * };
 922  *
 923  * This pass is necessary because the right-hand side of <type> e = { ... }
 924  * doesn't contain sufficient information to determine if the types match.
 925  */
 926 void
 927 _mesa_ast_set_aggregate_type(const glsl_type *type,
 928                              ast_expression *expr)
 929 {
 930    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 931    ai->constructor_type = type;
 932
 933    /* If the aggregate is an array, recursively set its elements' types. */
 934    if (type->is_array()) {
 935       /* Each array element has the type type->fields.array.
 936        *
 937        * E.g., if <type> if struct S[2] we want to set each element's type to
 938        * struct S.
 939        */
 940       for (exec_node *expr_node = ai->expressions.get_head_raw();
 941            !expr_node->is_tail_sentinel();
 942            expr_node = expr_node->next) {
 943          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 944                                                link);
 945
 946          if (expr->oper == ast_aggregate)
 947             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 948       }
 949
 950    /* If the aggregate is a struct, recursively set its fields' types. */
 951    } else if (type->is_struct()) {
 952       exec_node *expr_node = ai->expressions.get_head_raw();
 953
 954       /* Iterate through the struct's fields. */
 955       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 956            i++, expr_node = expr_node->next) {
 957          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 958                                                link);
 959
 960          if (expr->oper == ast_aggregate) {
 961             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 962          }
 963       }
 964    /* If the aggregate is a matrix, set its columns' types. */
 965    } else if (type->is_matrix()) {
 966       for (exec_node *expr_node = ai->expressions.get_head_raw();
 967            !expr_node->is_tail_sentinel();
 968            expr_node = expr_node->next) {
 969          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 970                                                link);
 971
 972          if (expr->oper == ast_aggregate)
 973             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 974       }
 975    }
 976 }
 977
 978 void
 979 _mesa_ast_process_interface_block(YYLTYPE *locp,
 980                                   _mesa_glsl_parse_state *state,
 981                                   ast_interface_block *const block,
 982                                   const struct ast_type_qualifier &q)
 983 {
 984    if (q.flags.q.buffer) {
 985       if (!state->has_shader_storage_buffer_objects()) {
 986          _mesa_glsl_error(locp, state,
 987                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 988                           "required for defining shader storage blocks");
 989       } else if (state->ARB_shader_storage_buffer_object_warn) {
 990          _mesa_glsl_warning(locp, state,
 991                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 992                             "required for defining shader storage blocks");
 993       }
 994    } else if (q.flags.q.uniform) {
 995       if (!state->has_uniform_buffer_objects()) {
 996          _mesa_glsl_error(locp, state,
 997                           "#version 140 / GL_ARB_uniform_buffer_object "
 998                           "required for defining uniform blocks");
 999       } else if (state->ARB_uniform_buffer_object_warn) {
1000          _mesa_glsl_warning(locp, state,
1001                             "#version 140 / GL_ARB_uniform_buffer_object "
1002                             "required for defining uniform blocks");
1003       }
1004    } else {
1005       if (!state->has_shader_io_blocks()) {
1006          if (state->es_shader) {
1007             _mesa_glsl_error(locp, state,
1008                              "GL_OES_shader_io_blocks or #version 320 "
1009                              "required for using interface blocks");
1010          } else {
1011             _mesa_glsl_error(locp, state,
1012                              "#version 150 required for using "
1013                              "interface blocks");
1014          }
1015       }
1016    }
1017
1018    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
1019     * "It is illegal to have an input block in a vertex shader
1020     *  or an output block in a fragment shader"
1021     */
1022    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
1023       _mesa_glsl_error(locp, state,
1024                        "`in' interface block is not allowed for "
1025                        "a vertex shader");
1026    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1027       _mesa_glsl_error(locp, state,
1028                        "`out' interface block is not allowed for "
1029                        "a fragment shader");
1030    }
1031
1032    /* Since block arrays require names, and both features are added in
1033     * the same language versions, we don't have to explicitly
1034     * version-check both things.
1035     */
1036    if (block->instance_name != NULL) {
1037       state->check_version(150, 300, locp, "interface blocks with "
1038                            "an instance name are not allowed");
1039    }
1040
1041    ast_type_qualifier::bitset_t interface_type_mask;
1042    struct ast_type_qualifier temp_type_qualifier;
1043
1044    /* Get a bitmask containing only the in/out/uniform/buffer
1045     * flags, allowing us to ignore other irrelevant flags like
1046     * interpolation qualifiers.
1047     */
1048    temp_type_qualifier.flags.i = 0;
1049    temp_type_qualifier.flags.q.uniform = true;
1050    temp_type_qualifier.flags.q.in = true;
1051    temp_type_qualifier.flags.q.out = true;
1052    temp_type_qualifier.flags.q.buffer = true;
1053    temp_type_qualifier.flags.q.patch = true;
1054    interface_type_mask = temp_type_qualifier.flags.i;
1055
1056    /* Get the block's interface qualifier.  The interface_qualifier
1057     * production rule guarantees that only one bit will be set (and
1058     * it will be in/out/uniform).
1059     */
1060    ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1061
1062    block->default_layout.flags.i |= block_interface_qualifier;
1063
1064    if (state->stage == MESA_SHADER_GEOMETRY &&
1065        state->has_explicit_attrib_stream() &&
1066        block->default_layout.flags.q.out) {
1067       /* Assign global layout's stream value. */
1068       block->default_layout.flags.q.stream = 1;
1069       block->default_layout.flags.q.explicit_stream = 0;
1070       block->default_layout.stream = state->out_qualifier->stream;
1071    }
1072
1073    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1074       /* Assign global layout's xfb_buffer value. */
1075       block->default_layout.flags.q.xfb_buffer = 1;
1076       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1077       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1078    }
1079
1080    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1081       ast_type_qualifier& qualifier = member->type->qualifier;
1082       if ((qualifier.flags.i & interface_type_mask) == 0) {
1083          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1084           * "If no optional qualifier is used in a member declaration, the
1085           *  qualifier of the variable is just in, out, or uniform as declared
1086           *  by interface-qualifier."
1087           */
1088          qualifier.flags.i |= block_interface_qualifier;
1089       } else if ((qualifier.flags.i & interface_type_mask) !=
1090                  block_interface_qualifier) {
1091          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1092           * "If optional qualifiers are used, they can include interpolation
1093           *  and storage qualifiers and they must declare an input, output,
1094           *  or uniform variable consistent with the interface qualifier of
1095           *  the block."
1096           */
1097          _mesa_glsl_error(locp, state,
1098                           "uniform/in/out qualifier on "
1099                           "interface block member does not match "
1100                           "the interface block");
1101       }
1102
1103       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1104          _mesa_glsl_error(locp, state,
1105                           "invariant qualifiers can be used only "
1106                           "in interface block members for shader "
1107                           "inputs or outputs");
1108    }
1109 }
1110
1111 static void
1112 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1113 {
1114    if (q->is_subroutine_decl())
1115       printf("subroutine ");
1116
1117    if (q->subroutine_list) {
1118       printf("subroutine (");
1119       q->subroutine_list->print();
1120       printf(")");
1121    }
1122
1123    if (q->flags.q.constant)
1124       printf("const ");
1125
1126    if (q->flags.q.invariant)
1127       printf("invariant ");
1128
1129    if (q->flags.q.attribute)
1130       printf("attribute ");
1131
1132    if (q->flags.q.varying)
1133       printf("varying ");
1134
1135    if (q->flags.q.in && q->flags.q.out)
1136       printf("inout ");
1137    else {
1138       if (q->flags.q.in)
1139          printf("in ");
1140
1141       if (q->flags.q.out)
1142          printf("out ");
1143    }
1144
1145    if (q->flags.q.centroid)
1146       printf("centroid ");
1147    if (q->flags.q.sample)
1148       printf("sample ");
1149    if (q->flags.q.patch)
1150       printf("patch ");
1151    if (q->flags.q.uniform)
1152       printf("uniform ");
1153    if (q->flags.q.buffer)
1154       printf("buffer ");
1155    if (q->flags.q.smooth)
1156       printf("smooth ");
1157    if (q->flags.q.flat)
1158       printf("flat ");
1159    if (q->flags.q.noperspective)
1160       printf("noperspective ");
1161 }
1162
1163
1164 void
1165 ast_node::print(void) const
1166 {
1167    printf("unhandled node ");
1168 }
1169
1170
1171 ast_node::ast_node(void)
1172 {
1173    this->location.source = 0;
1174    this->location.first_line = 0;
1175    this->location.first_column = 0;
1176    this->location.last_line = 0;
1177    this->location.last_column = 0;
1178 }
1179
1180
1181 static void
1182 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1183 {
1184    if (array_specifier)
1185       array_specifier->print();
1186 }
1187
1188
1189 void
1190 ast_compound_statement::print(void) const
1191 {
1192    printf("{\n");
1193
1194    foreach_list_typed(ast_node, ast, link, &this->statements) {
1195       ast->print();
1196    }
1197
1198    printf("}\n");
1199 }
1200
1201
1202 ast_compound_statement::ast_compound_statement(int new_scope,
1203                                                ast_node *statements)
1204 {
1205    this->new_scope = new_scope;
1206
1207    if (statements != NULL) {
1208       this->statements.push_degenerate_list_at_head(&statements->link);
1209    }
1210 }
1211
1212
1213 void
1214 ast_expression::print(void) const
1215 {
1216    switch (oper) {
1217    case ast_assign:
1218    case ast_mul_assign:
1219    case ast_div_assign:
1220    case ast_mod_assign:
1221    case ast_add_assign:
1222    case ast_sub_assign:
1223    case ast_ls_assign:
1224    case ast_rs_assign:
1225    case ast_and_assign:
1226    case ast_xor_assign:
1227    case ast_or_assign:
1228       subexpressions[0]->print();
1229       printf("%s ", operator_string(oper));
1230       subexpressions[1]->print();
1231       break;
1232
1233    case ast_field_selection:
1234       subexpressions[0]->print();
1235       printf(". %s ", primary_expression.identifier);
1236       break;
1237
1238    case ast_plus:
1239    case ast_neg:
1240    case ast_bit_not:
1241    case ast_logic_not:
1242    case ast_pre_inc:
1243    case ast_pre_dec:
1244       printf("%s ", operator_string(oper));
1245       subexpressions[0]->print();
1246       break;
1247
1248    case ast_post_inc:
1249    case ast_post_dec:
1250       subexpressions[0]->print();
1251       printf("%s ", operator_string(oper));
1252       break;
1253
1254    case ast_conditional:
1255       subexpressions[0]->print();
1256       printf("? ");
1257       subexpressions[1]->print();
1258       printf(": ");
1259       subexpressions[2]->print();
1260       break;
1261
1262    case ast_array_index:
1263       subexpressions[0]->print();
1264       printf("[ ");
1265       subexpressions[1]->print();
1266       printf("] ");
1267       break;
1268
1269    case ast_function_call: {
1270       subexpressions[0]->print();
1271       printf("( ");
1272
1273       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1274          if (&ast->link != this->expressions.get_head())
1275             printf(", ");
1276
1277          ast->print();
1278       }
1279
1280       printf(") ");
1281       break;
1282    }
1283
1284    case ast_identifier:
1285       printf("%s ", primary_expression.identifier);
1286       break;
1287
1288    case ast_int_constant:
1289       printf("%d ", primary_expression.int_constant);
1290       break;
1291
1292    case ast_uint_constant:
1293       printf("%u ", primary_expression.uint_constant);
1294       break;
1295
1296    case ast_float_constant:
1297       printf("%f ", primary_expression.float_constant);
1298       break;
1299
1300    case ast_double_constant:
1301       printf("%f ", primary_expression.double_constant);
1302       break;
1303
1304    case ast_int64_constant:
1305       printf("%" PRId64 " ", primary_expression.int64_constant);
1306       break;
1307
1308    case ast_uint64_constant:
1309       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1310       break;
1311
1312    case ast_bool_constant:
1313       printf("%s ",
1314              primary_expression.bool_constant
1315              ? "true" : "false");
1316       break;
1317
1318    case ast_sequence: {
1319       printf("( ");
1320       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1321          if (&ast->link != this->expressions.get_head())
1322             printf(", ");
1323
1324          ast->print();
1325       }
1326       printf(") ");
1327       break;
1328    }
1329
1330    case ast_aggregate: {
1331       printf("{ ");
1332       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1333          if (&ast->link != this->expressions.get_head())
1334             printf(", ");
1335
1336          ast->print();
1337       }
1338       printf("} ");
1339       break;
1340    }
1341
1342    default:
1343       assert(0);
1344       break;
1345    }
1346 }
1347
1348 ast_expression::ast_expression(int oper,
1349                                ast_expression *ex0,
1350                                ast_expression *ex1,
1351                                ast_expression *ex2) :
1352    primary_expression()
1353 {
1354    this->oper = ast_operators(oper);
1355    this->subexpressions[0] = ex0;
1356    this->subexpressions[1] = ex1;
1357    this->subexpressions[2] = ex2;
1358    this->non_lvalue_description = NULL;
1359    this->is_lhs = false;
1360 }
1361
1362
1363 void
1364 ast_expression_statement::print(void) const
1365 {
1366    if (expression)
1367       expression->print();
1368
1369    printf("; ");
1370 }
1371
1372
1373 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1374    expression(ex)
1375 {
1376    /* empty */
1377 }
1378
1379
1380 void
1381 ast_function::print(void) const
1382 {
1383    return_type->print();
1384    printf(" %s (", identifier);
1385
1386    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1387       ast->print();
1388    }
1389
1390    printf(")");
1391 }
1392
1393
1394 ast_function::ast_function(void)
1395    : return_type(NULL), identifier(NULL), is_definition(false),
1396      signature(NULL)
1397 {
1398    /* empty */
1399 }
1400
1401
1402 void
1403 ast_fully_specified_type::print(void) const
1404 {
1405    _mesa_ast_type_qualifier_print(& qualifier);
1406    specifier->print();
1407 }
1408
1409
1410 void
1411 ast_parameter_declarator::print(void) const
1412 {
1413    type->print();
1414    if (identifier)
1415       printf("%s ", identifier);
1416    ast_opt_array_dimensions_print(array_specifier);
1417 }
1418
1419
1420 void
1421 ast_function_definition::print(void) const
1422 {
1423    prototype->print();
1424    body->print();
1425 }
1426
1427
1428 void
1429 ast_declaration::print(void) const
1430 {
1431    printf("%s ", identifier);
1432    ast_opt_array_dimensions_print(array_specifier);
1433
1434    if (initializer) {
1435       printf("= ");
1436       initializer->print();
1437    }
1438 }
1439
1440
1441 ast_declaration::ast_declaration(const char *identifier,
1442                                  ast_array_specifier *array_specifier,
1443                                  ast_expression *initializer)
1444 {
1445    this->identifier = identifier;
1446    this->array_specifier = array_specifier;
1447    this->initializer = initializer;
1448 }
1449
1450
1451 void
1452 ast_declarator_list::print(void) const
1453 {
1454    assert(type || invariant);
1455
1456    if (type)
1457       type->print();
1458    else if (invariant)
1459       printf("invariant ");
1460    else
1461       printf("precise ");
1462
1463    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1464       if (&ast->link != this->declarations.get_head())
1465          printf(", ");
1466
1467       ast->print();
1468    }
1469
1470    printf("; ");
1471 }
1472
1473
1474 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1475 {
1476    this->type = type;
1477    this->invariant = false;
1478    this->precise = false;
1479 }
1480
1481 void
1482 ast_jump_statement::print(void) const
1483 {
1484    switch (mode) {
1485    case ast_continue:
1486       printf("continue; ");
1487       break;
1488    case ast_break:
1489       printf("break; ");
1490       break;
1491    case ast_return:
1492       printf("return ");
1493       if (opt_return_value)
1494          opt_return_value->print();
1495
1496       printf("; ");
1497       break;
1498    case ast_discard:
1499       printf("discard; ");
1500       break;
1501    }
1502 }
1503
1504
1505 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1506    : opt_return_value(NULL)
1507 {
1508    this->mode = ast_jump_modes(mode);
1509
1510    if (mode == ast_return)
1511       opt_return_value = return_value;
1512 }
1513
1514
1515 void
1516 ast_demote_statement::print(void) const
1517 {
1518    printf("demote; ");
1519 }
1520
1521
1522 void
1523 ast_selection_statement::print(void) const
1524 {
1525    printf("if ( ");
1526    condition->print();
1527    printf(") ");
1528
1529    then_statement->print();
1530
1531    if (else_statement) {
1532       printf("else ");
1533       else_statement->print();
1534    }
1535 }
1536
1537
1538 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1539                                                  ast_node *then_statement,
1540                                                  ast_node *else_statement)
1541 {
1542    this->condition = condition;
1543    this->then_statement = then_statement;
1544    this->else_statement = else_statement;
1545 }
1546
1547
1548 void
1549 ast_switch_statement::print(void) const
1550 {
1551    printf("switch ( ");
1552    test_expression->print();
1553    printf(") ");
1554
1555    body->print();
1556 }
1557
1558
1559 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1560                                            ast_node *body)
1561 {
1562    this->test_expression = test_expression;
1563    this->body = body;
1564 }
1565
1566
1567 void
1568 ast_switch_body::print(void) const
1569 {
1570    printf("{\n");
1571    if (stmts != NULL) {
1572       stmts->print();
1573    }
1574    printf("}\n");
1575 }
1576
1577
1578 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1579 {
1580    this->stmts = stmts;
1581 }
1582
1583
1584 void ast_case_label::print(void) const
1585 {
1586    if (test_value != NULL) {
1587       printf("case ");
1588       test_value->print();
1589       printf(": ");
1590    } else {
1591       printf("default: ");
1592    }
1593 }
1594
1595
1596 ast_case_label::ast_case_label(ast_expression *test_value)
1597 {
1598    this->test_value = test_value;
1599 }
1600
1601
1602 void ast_case_label_list::print(void) const
1603 {
1604    foreach_list_typed(ast_node, ast, link, & this->labels) {
1605       ast->print();
1606    }
1607    printf("\n");
1608 }
1609
1610
1611 ast_case_label_list::ast_case_label_list(void)
1612 {
1613 }
1614
1615
1616 void ast_case_statement::print(void) const
1617 {
1618    labels->print();
1619    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1620       ast->print();
1621       printf("\n");
1622    }
1623 }
1624
1625
1626 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1627 {
1628    this->labels = labels;
1629 }
1630
1631
1632 void ast_case_statement_list::print(void) const
1633 {
1634    foreach_list_typed(ast_node, ast, link, & this->cases) {
1635       ast->print();
1636    }
1637 }
1638
1639
1640 ast_case_statement_list::ast_case_statement_list(void)
1641 {
1642 }
1643
1644
1645 void
1646 ast_iteration_statement::print(void) const
1647 {
1648    switch (mode) {
1649    case ast_for:
1650       printf("for( ");
1651       if (init_statement)
1652          init_statement->print();
1653       printf("; ");
1654
1655       if (condition)
1656          condition->print();
1657       printf("; ");
1658
1659       if (rest_expression)
1660          rest_expression->print();
1661       printf(") ");
1662
1663       body->print();
1664       break;
1665
1666    case ast_while:
1667       printf("while ( ");
1668       if (condition)
1669          condition->print();
1670       printf(") ");
1671       body->print();
1672       break;
1673
1674    case ast_do_while:
1675       printf("do ");
1676       body->print();
1677       printf("while ( ");
1678       if (condition)
1679          condition->print();
1680       printf("); ");
1681       break;
1682    }
1683 }
1684
1685
1686 ast_iteration_statement::ast_iteration_statement(int mode,
1687                                                  ast_node *init,
1688                                                  ast_node *condition,
1689                                                  ast_expression *rest_expression,
1690                                                  ast_node *body)
1691 {
1692    this->mode = ast_iteration_modes(mode);
1693    this->init_statement = init;
1694    this->condition = condition;
1695    this->rest_expression = rest_expression;
1696    this->body = body;
1697 }
1698
1699
1700 void
1701 ast_struct_specifier::print(void) const
1702 {
1703    printf("struct %s { ", name);
1704    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1705       ast->print();
1706    }
1707    printf("} ");
1708 }
1709
1710
1711 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1712                                            ast_declarator_list *declarator_list)
1713    : name(identifier), layout(NULL), declarations(), is_declaration(true),
1714      type(NULL)
1715 {
1716    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1717 }
1718
1719 void ast_subroutine_list::print(void) const
1720 {
1721    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1722       if (&ast->link != this->declarations.get_head())
1723          printf(", ");
1724       ast->print();
1725    }
1726 }
1727
1728 static void
1729 set_shader_inout_layout(struct gl_shader *shader,
1730                      struct _mesa_glsl_parse_state *state)
1731 {
1732    /* Should have been prevented by the parser. */
1733    if (shader->Stage != MESA_SHADER_GEOMETRY &&
1734        shader->Stage != MESA_SHADER_TESS_EVAL &&
1735        shader->Stage != MESA_SHADER_COMPUTE) {
1736       assert(!state->in_qualifier->flags.i);
1737    }
1738
1739    if (shader->Stage != MESA_SHADER_COMPUTE) {
1740       /* Should have been prevented by the parser. */
1741       assert(!state->cs_input_local_size_specified);
1742       assert(!state->cs_input_local_size_variable_specified);
1743       assert(state->cs_derivative_group == DERIVATIVE_GROUP_NONE);
1744    }
1745
1746    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1747       /* Should have been prevented by the parser. */
1748       assert(!state->fs_uses_gl_fragcoord);
1749       assert(!state->fs_redeclares_gl_fragcoord);
1750       assert(!state->fs_pixel_center_integer);
1751       assert(!state->fs_origin_upper_left);
1752       assert(!state->fs_early_fragment_tests);
1753       assert(!state->fs_inner_coverage);
1754       assert(!state->fs_post_depth_coverage);
1755       assert(!state->fs_pixel_interlock_ordered);
1756       assert(!state->fs_pixel_interlock_unordered);
1757       assert(!state->fs_sample_interlock_ordered);
1758       assert(!state->fs_sample_interlock_unordered);
1759    }
1760
1761    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1762       if (state->out_qualifier->out_xfb_stride[i]) {
1763          unsigned xfb_stride;
1764          if (state->out_qualifier->out_xfb_stride[i]->
1765                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1766                 true)) {
1767             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1768          }
1769       }
1770    }
1771
1772    switch (shader->Stage) {
1773    case MESA_SHADER_TESS_CTRL:
1774       shader->info.TessCtrl.VerticesOut = 0;
1775       if (state->tcs_output_vertices_specified) {
1776          unsigned vertices;
1777          if (state->out_qualifier->vertices->
1778                process_qualifier_constant(state, "vertices", &vertices,
1779                                           false)) {
1780
1781             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1782             if (vertices > state->Const.MaxPatchVertices) {
1783                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1784                                 "GL_MAX_PATCH_VERTICES", vertices);
1785             }
1786             shader->info.TessCtrl.VerticesOut = vertices;
1787          }
1788       }
1789       break;
1790    case MESA_SHADER_TESS_EVAL:
1791       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1792       if (state->in_qualifier->flags.q.prim_type)
1793          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1794
1795       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1796       if (state->in_qualifier->flags.q.vertex_spacing)
1797          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1798
1799       shader->info.TessEval.VertexOrder = 0;
1800       if (state->in_qualifier->flags.q.ordering)
1801          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1802
1803       shader->info.TessEval.PointMode = -1;
1804       if (state->in_qualifier->flags.q.point_mode)
1805          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1806       break;
1807    case MESA_SHADER_GEOMETRY:
1808       shader->info.Geom.VerticesOut = -1;
1809       if (state->out_qualifier->flags.q.max_vertices) {
1810          unsigned qual_max_vertices;
1811          if (state->out_qualifier->max_vertices->
1812                process_qualifier_constant(state, "max_vertices",
1813                                           &qual_max_vertices, true)) {
1814
1815             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1816                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1817                _mesa_glsl_error(&loc, state,
1818                                 "maximum output vertices (%d) exceeds "
1819                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1820                                 qual_max_vertices);
1821             }
1822             shader->info.Geom.VerticesOut = qual_max_vertices;
1823          }
1824       }
1825
1826       if (state->gs_input_prim_type_specified) {
1827          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1828       } else {
1829          shader->info.Geom.InputType = PRIM_UNKNOWN;
1830       }
1831
1832       if (state->out_qualifier->flags.q.prim_type) {
1833          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1834       } else {
1835          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1836       }
1837
1838       shader->info.Geom.Invocations = 0;
1839       if (state->in_qualifier->flags.q.invocations) {
1840          unsigned invocations;
1841          if (state->in_qualifier->invocations->
1842                process_qualifier_constant(state, "invocations",
1843                                           &invocations, false)) {
1844
1845             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1846             if (invocations > state->Const.MaxGeometryShaderInvocations) {
1847                _mesa_glsl_error(&loc, state,
1848                                 "invocations (%d) exceeds "
1849                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1850                                 invocations);
1851             }
1852             shader->info.Geom.Invocations = invocations;
1853          }
1854       }
1855       break;
1856
1857    case MESA_SHADER_COMPUTE:
1858       if (state->cs_input_local_size_specified) {
1859          for (int i = 0; i < 3; i++)
1860             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1861       } else {
1862          for (int i = 0; i < 3; i++)
1863             shader->info.Comp.LocalSize[i] = 0;
1864       }
1865
1866       shader->info.Comp.LocalSizeVariable =
1867          state->cs_input_local_size_variable_specified;
1868
1869       shader->info.Comp.DerivativeGroup = state->cs_derivative_group;
1870
1871       if (state->NV_compute_shader_derivatives_enable) {
1872          /* We allow multiple cs_input_layout nodes, but do not store them in
1873           * a convenient place, so for now live with an empty location error.
1874           */
1875          YYLTYPE loc = {0};
1876          if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_QUADS) {
1877             if (shader->info.Comp.LocalSize[0] % 2 != 0) {
1878                _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1879                                 "local group size whose first dimension "
1880                                 "is a multiple of 2\n");
1881             }
1882             if (shader->info.Comp.LocalSize[1] % 2 != 0) {
1883                _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1884                                 "local group size whose second dimension "
1885                                 "is a multiple of 2\n");
1886             }
1887          } else if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_LINEAR) {
1888             if ((shader->info.Comp.LocalSize[0] *
1889                  shader->info.Comp.LocalSize[1] *
1890                  shader->info.Comp.LocalSize[2]) % 4 != 0) {
1891                _mesa_glsl_error(&loc, state, "derivative_group_linearNV must be used with a "
1892                             "local group size whose total number of invocations "
1893                             "is a multiple of 4\n");
1894             }
1895          }
1896       }
1897
1898       break;
1899
1900    case MESA_SHADER_FRAGMENT:
1901       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1902       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1903       shader->pixel_center_integer = state->fs_pixel_center_integer;
1904       shader->origin_upper_left = state->fs_origin_upper_left;
1905       shader->ARB_fragment_coord_conventions_enable =
1906          state->ARB_fragment_coord_conventions_enable;
1907       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1908       shader->InnerCoverage = state->fs_inner_coverage;
1909       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1910       shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
1911       shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
1912       shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
1913       shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
1914       shader->BlendSupport = state->fs_blend_support;
1915       break;
1916
1917    default:
1918       /* Nothing to do. */
1919       break;
1920    }
1921
1922    shader->bindless_sampler = state->bindless_sampler_specified;
1923    shader->bindless_image = state->bindless_image_specified;
1924    shader->bound_sampler = state->bound_sampler_specified;
1925    shader->bound_image = state->bound_image_specified;
1926 }
1927
1928 /* src can be NULL if only the symbols found in the exec_list should be
1929  * copied
1930  */
1931 void
1932 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1933                                    struct glsl_symbol_table *src,
1934                                    struct glsl_symbol_table *dest)
1935 {
1936    foreach_in_list (ir_instruction, ir, shader_ir) {
1937       switch (ir->ir_type) {
1938       case ir_type_function:
1939          dest->add_function((ir_function *) ir);
1940          break;
1941       case ir_type_variable: {
1942          ir_variable *const var = (ir_variable *) ir;
1943
1944          if (var->data.mode != ir_var_temporary)
1945             dest->add_variable(var);
1946          break;
1947       }
1948       default:
1949          break;
1950       }
1951    }
1952
1953    if (src != NULL) {
1954       /* Explicitly copy the gl_PerVertex interface definitions because these
1955        * are needed to check they are the same during the interstage link.
1956        * They can’t necessarily be found via the exec_list because the members
1957        * might not be referenced. The GL spec still requires that they match
1958        * in that case.
1959        */
1960       const glsl_type *iface =
1961          src->get_interface("gl_PerVertex", ir_var_shader_in);
1962       if (iface)
1963          dest->add_interface(iface->name, iface, ir_var_shader_in);
1964
1965       iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1966       if (iface)
1967          dest->add_interface(iface->name, iface, ir_var_shader_out);
1968    }
1969 }
1970
1971 extern "C" {
1972
1973 static void
1974 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1975 {
1976    int j, k;
1977    int index = 0;
1978
1979    for (j = 0; j < state->num_subroutines; j++) {
1980       while (state->subroutines[j]->subroutine_index == -1) {
1981          for (k = 0; k < state->num_subroutines; k++) {
1982             if (state->subroutines[k]->subroutine_index == index)
1983                break;
1984             else if (k == state->num_subroutines - 1) {
1985                state->subroutines[j]->subroutine_index = index;
1986             }
1987          }
1988          index++;
1989       }
1990    }
1991 }
1992
1993 static void
1994 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1995                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1996                     struct glcpp_parser *data,
1997                     unsigned version,
1998                     bool es)
1999 {
2000    unsigned gl_version = state->ctx->Extensions.Version;
2001    gl_api api = state->ctx->API;
2002
2003    if (gl_version != 0xff) {
2004       unsigned i;
2005       for (i = 0; i < state->num_supported_versions; i++) {
2006          if (state->supported_versions[i].ver == version &&
2007              state->supported_versions[i].es == es) {
2008             gl_version = state->supported_versions[i].gl_ver;
2009             break;
2010          }
2011       }
2012
2013       if (i == state->num_supported_versions)
2014          return;
2015    }
2016
2017    if (es)
2018       api = API_OPENGLES2;
2019
2020    for (unsigned i = 0;
2021         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
2022       const _mesa_glsl_extension *extension
2023          = &_mesa_glsl_supported_extensions[i];
2024       if (extension->compatible_with_state(state, api, gl_version)) {
2025          add_builtin_define(data, extension->name, 1);
2026       }
2027    }
2028 }
2029
2030 /* Implements parsing checks that we can't do during parsing */
2031 static void
2032 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
2033 {
2034    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
2035       YYLTYPE loc;
2036       memset(&loc, 0, sizeof(loc));
2037       _mesa_glsl_error(&loc, state, "Compute shaders require "
2038                        "GLSL 4.30 or GLSL ES 3.10");
2039    }
2040 }
2041
2042 static void
2043 opt_shader_and_create_symbol_table(struct gl_context *ctx,
2044                                    struct glsl_symbol_table *source_symbols,
2045                                    struct gl_shader *shader)
2046 {
2047    assert(shader->CompileStatus != COMPILE_FAILURE &&
2048           !shader->ir->is_empty());
2049
2050    struct gl_shader_compiler_options *options =
2051       &ctx->Const.ShaderCompilerOptions[shader->Stage];
2052
2053    /* Do some optimization at compile time to reduce shader IR size
2054     * and reduce later work if the same shader is linked multiple times
2055     */
2056    if (ctx->Const.GLSLOptimizeConservatively) {
2057       /* Run it just once. */
2058       do_common_optimization(shader->ir, false, false, options,
2059                              ctx->Const.NativeIntegers);
2060    } else {
2061       /* Repeat it until it stops making changes. */
2062       while (do_common_optimization(shader->ir, false, false, options,
2063                                     ctx->Const.NativeIntegers))
2064          ;
2065    }
2066
2067    validate_ir_tree(shader->ir);
2068
2069    enum ir_variable_mode other;
2070    switch (shader->Stage) {
2071    case MESA_SHADER_VERTEX:
2072       other = ir_var_shader_in;
2073       break;
2074    case MESA_SHADER_FRAGMENT:
2075       other = ir_var_shader_out;
2076       break;
2077    default:
2078       /* Something invalid to ensure optimize_dead_builtin_uniforms
2079        * doesn't remove anything other than uniforms or constants.
2080        */
2081       other = ir_var_mode_count;
2082       break;
2083    }
2084
2085    optimize_dead_builtin_variables(shader->ir, other);
2086
2087    validate_ir_tree(shader->ir);
2088
2089    /* Retain any live IR, but trash the rest. */
2090    reparent_ir(shader->ir, shader->ir);
2091
2092    /* Destroy the symbol table.  Create a new symbol table that contains only
2093     * the variables and functions that still exist in the IR.  The symbol
2094     * table will be used later during linking.
2095     *
2096     * There must NOT be any freed objects still referenced by the symbol
2097     * table.  That could cause the linker to dereference freed memory.
2098     *
2099     * We don't have to worry about types or interface-types here because those
2100     * are fly-weights that are looked up by glsl_type.
2101     */
2102    _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2103                                       shader->symbols);
2104 }
2105
2106 void
2107 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2108                           bool dump_ast, bool dump_hir, bool force_recompile)
2109 {
2110    const char *source = force_recompile && shader->FallbackSource ?
2111       shader->FallbackSource : shader->Source;
2112
2113    if (!force_recompile) {
2114       if (ctx->Cache) {
2115          char buf[41];
2116          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2117                                 shader->sha1);
2118          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2119             /* We've seen this shader before and know it compiles */
2120             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2121                _mesa_sha1_format(buf, shader->sha1);
2122                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2123             }
2124             shader->CompileStatus = COMPILE_SKIPPED;
2125
2126             free((void *)shader->FallbackSource);
2127             shader->FallbackSource = NULL;
2128             return;
2129          }
2130       }
2131    } else {
2132       /* We should only ever end up here if a re-compile has been forced by a
2133        * shader cache miss. In which case we can skip the compile if its
2134        * already be done by a previous fallback or the initial compile call.
2135        */
2136       if (shader->CompileStatus == COMPILE_SUCCESS)
2137          return;
2138    }
2139
2140    struct _mesa_glsl_parse_state *state =
2141       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2142
2143    if (ctx->Const.GenerateTemporaryNames)
2144       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2145                               false, true);
2146
2147    state->error = glcpp_preprocess(state, &source, &state->info_log,
2148                                    add_builtin_defines, state, ctx);
2149
2150    if (!state->error) {
2151      _mesa_glsl_lexer_ctor(state, source);
2152      _mesa_glsl_parse(state);
2153      _mesa_glsl_lexer_dtor(state);
2154      do_late_parsing_checks(state);
2155    }
2156
2157    if (dump_ast) {
2158       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2159          ast->print();
2160       }
2161       printf("\n\n");
2162    }
2163
2164    ralloc_free(shader->ir);
2165    shader->ir = new(shader) exec_list;
2166    if (!state->error && !state->translation_unit.is_empty())
2167       _mesa_ast_to_hir(shader->ir, state);
2168
2169    if (!state->error) {
2170       validate_ir_tree(shader->ir);
2171
2172       /* Print out the unoptimized IR. */
2173       if (dump_hir) {
2174          _mesa_print_ir(stdout, shader->ir, state);
2175       }
2176    }
2177
2178    if (shader->InfoLog)
2179       ralloc_free(shader->InfoLog);
2180
2181    if (!state->error)
2182       set_shader_inout_layout(shader, state);
2183
2184    shader->symbols = new(shader->ir) glsl_symbol_table;
2185    shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2186    shader->InfoLog = state->info_log;
2187    shader->Version = state->language_version;
2188    shader->IsES = state->es_shader;
2189
2190    if (!state->error && !shader->ir->is_empty()) {
2191       assign_subroutine_indexes(state);
2192       lower_subroutine(shader->ir, state);
2193       opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2194    }
2195
2196    if (!force_recompile) {
2197       free((void *)shader->FallbackSource);
2198       shader->FallbackSource = NULL;
2199    }
2200
2201    delete state->symbols;
2202    ralloc_free(state);
2203
2204    if (ctx->Cache && shader->CompileStatus == COMPILE_SUCCESS) {
2205       char sha1_buf[41];
2206       disk_cache_put_key(ctx->Cache, shader->sha1);
2207       if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2208          _mesa_sha1_format(sha1_buf, shader->sha1);
2209          fprintf(stderr, "marking shader: %s\n", sha1_buf);
2210       }
2211    }
2212 }
2213
2214 } /* extern "C" */
2215 /**
2216  * Do the set of common optimizations passes
2217  *
2218  * \param ir                          List of instructions to be optimized
2219  * \param linked                      Is the shader linked?  This enables
2220  *                                    optimizations passes that remove code at
2221  *                                    global scope and could cause linking to
2222  *                                    fail.
2223  * \param uniform_locations_assigned  Have locations already been assigned for
2224  *                                    uniforms?  This prevents the declarations
2225  *                                    of unused uniforms from being removed.
2226  *                                    The setting of this flag only matters if
2227  *                                    \c linked is \c true.
2228  * \param options                     The driver's preferred shader options.
2229  * \param native_integers             Selects optimizations that depend on the
2230  *                                    implementations supporting integers
2231  *                                    natively (as opposed to supporting
2232  *                                    integers in floating point registers).
2233  */
2234 bool
2235 do_common_optimization(exec_list *ir, bool linked,
2236                        bool uniform_locations_assigned,
2237                        const struct gl_shader_compiler_options *options,
2238                        bool native_integers)
2239 {
2240    const bool debug = false;
2241    bool progress = false;
2242
2243 #define OPT(PASS, ...) do {                                             \
2244       if (debug) {                                                      \
2245          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2246          const bool opt_progress = PASS(__VA_ARGS__);                   \
2247          progress = opt_progress || progress;                           \
2248          if (opt_progress)                                              \
2249             _mesa_print_ir(stderr, ir, NULL);                           \
2250          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2251                  #PASS, opt_progress ? "made" : "no");                  \
2252       } else {                                                          \
2253          progress = PASS(__VA_ARGS__) || progress;                      \
2254       }                                                                 \
2255    } while (false)
2256
2257    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2258
2259    if (linked) {
2260       OPT(do_function_inlining, ir);
2261       OPT(do_dead_functions, ir);
2262       OPT(do_structure_splitting, ir);
2263    }
2264    propagate_invariance(ir);
2265    OPT(do_if_simplification, ir);
2266    OPT(opt_flatten_nested_if_blocks, ir);
2267    OPT(opt_conditional_discard, ir);
2268    OPT(do_copy_propagation_elements, ir);
2269
2270    if (options->OptimizeForAOS && !linked)
2271       OPT(opt_flip_matrices, ir);
2272
2273    if (linked && options->OptimizeForAOS) {
2274       OPT(do_vectorize, ir);
2275    }
2276
2277    if (linked)
2278       OPT(do_dead_code, ir, uniform_locations_assigned);
2279    else
2280       OPT(do_dead_code_unlinked, ir);
2281    OPT(do_dead_code_local, ir);
2282    OPT(do_tree_grafting, ir);
2283    OPT(do_constant_propagation, ir);
2284    if (linked)
2285       OPT(do_constant_variable, ir);
2286    else
2287       OPT(do_constant_variable_unlinked, ir);
2288    OPT(do_constant_folding, ir);
2289    OPT(do_minmax_prune, ir);
2290    OPT(do_rebalance_tree, ir);
2291    OPT(do_algebraic, ir, native_integers, options);
2292    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2293        options->EmitNoCont, options->EmitNoLoops);
2294    OPT(do_vec_index_to_swizzle, ir);
2295    OPT(lower_vector_insert, ir, false);
2296    OPT(optimize_swizzles, ir);
2297
2298    OPT(optimize_split_arrays, ir, linked);
2299    OPT(optimize_redundant_jumps, ir);
2300
2301    if (options->MaxUnrollIterations) {
2302       loop_state *ls = analyze_loop_variables(ir);
2303       if (ls->loop_found) {
2304          bool loop_progress = unroll_loops(ir, ls, options);
2305          while (loop_progress) {
2306             loop_progress = false;
2307             loop_progress |= do_constant_propagation(ir);
2308             loop_progress |= do_if_simplification(ir);
2309
2310             /* Some drivers only call do_common_optimization() once rather
2311              * than in a loop. So we must call do_lower_jumps() after
2312              * unrolling a loop because for drivers that use LLVM validation
2313              * will fail if a jump is not the last instruction in the block.
2314              * For example the following will fail LLVM validation:
2315              *
2316              *   (loop (
2317              *      ...
2318              *   break
2319              *   (assign  (x) (var_ref v124)  (expression int + (var_ref v124)
2320              *      (constant int (1)) ) )
2321              *   ))
2322              */
2323             loop_progress |= do_lower_jumps(ir, true, true,
2324                                             options->EmitNoMainReturn,
2325                                             options->EmitNoCont,
2326                                             options->EmitNoLoops);
2327          }
2328          progress |= loop_progress;
2329       }
2330       delete ls;
2331    }
2332
2333 #undef OPT
2334
2335    return progress;
2336 }