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    if (locp->path) {
 499       ralloc_asprintf_append(&state->info_log, "\"%s\"", locp->path);
 500    } else {
 501       ralloc_asprintf_append(&state->info_log, "%u", locp->source);
 502    }
 503    ralloc_asprintf_append(&state->info_log, ":%u(%u): %s: ",
 504                           locp->first_line, locp->first_column,
 505                           error ? "error" : "warning");
 506
 507    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 508
 509    const char *const msg = &state->info_log[msg_offset];
 510    struct gl_context *ctx = state->ctx;
 511
 512    /* Report the error via GL_ARB_debug_output. */
 513    _mesa_shader_debug(ctx, type, &msg_id, msg);
 514
 515    ralloc_strcat(&state->info_log, "\n");
 516 }
 517
 518 void
 519 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 520                  const char *fmt, ...)
 521 {
 522    va_list ap;
 523
 524    state->error = true;
 525
 526    va_start(ap, fmt);
 527    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 528    va_end(ap);
 529 }
 530
 531
 532 void
 533 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 534                    const char *fmt, ...)
 535 {
 536    if (state->warnings_enabled) {
 537       va_list ap;
 538
 539       va_start(ap, fmt);
 540       _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 541       va_end(ap);
 542    }
 543 }
 544
 545
 546 /**
 547  * Enum representing the possible behaviors that can be specified in
 548  * an #extension directive.
 549  */
 550 enum ext_behavior {
 551    extension_disable,
 552    extension_enable,
 553    extension_require,
 554    extension_warn
 555 };
 556
 557 /**
 558  * Element type for _mesa_glsl_supported_extensions
 559  */
 560 struct _mesa_glsl_extension {
 561    /**
 562     * Name of the extension when referred to in a GLSL extension
 563     * statement
 564     */
 565    const char *name;
 566
 567    /**
 568     * Whether this extension is a part of AEP
 569     */
 570    bool aep;
 571
 572    /**
 573     * Predicate that checks whether the relevant extension is available for
 574     * this context.
 575     */
 576    bool (*available_pred)(const struct gl_context *,
 577                           gl_api api, uint8_t version);
 578
 579    /**
 580     * Flag in the _mesa_glsl_parse_state struct that should be set
 581     * when this extension is enabled.
 582     *
 583     * See note in _mesa_glsl_extension::supported_flag about "pointer
 584     * to member" types.
 585     */
 586    bool _mesa_glsl_parse_state::* enable_flag;
 587
 588    /**
 589     * Flag in the _mesa_glsl_parse_state struct that should be set
 590     * when the shader requests "warn" behavior for this extension.
 591     *
 592     * See note in _mesa_glsl_extension::supported_flag about "pointer
 593     * to member" types.
 594     */
 595    bool _mesa_glsl_parse_state::* warn_flag;
 596
 597
 598    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 599                               gl_api api, uint8_t gl_version) const;
 600    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 601 };
 602
 603 /** Checks if the context supports a user-facing extension */
 604 #define EXT(name_str, driver_cap, ...) \
 605 static UNUSED bool \
 606 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 607 { \
 608    return ctx->Extensions.driver_cap && (version >= \
 609           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 610 }
 611 #include "main/extensions_table.h"
 612 #undef EXT
 613
 614 #define EXT(NAME)                                           \
 615    { "GL_" #NAME, false, has_##NAME,                        \
 616      &_mesa_glsl_parse_state::NAME##_enable,                \
 617      &_mesa_glsl_parse_state::NAME##_warn }
 618
 619 #define EXT_AEP(NAME)                                       \
 620    { "GL_" #NAME, true, has_##NAME,                         \
 621      &_mesa_glsl_parse_state::NAME##_enable,                \
 622      &_mesa_glsl_parse_state::NAME##_warn }
 623
 624 /**
 625  * Table of extensions that can be enabled/disabled within a shader,
 626  * and the conditions under which they are supported.
 627  */
 628 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 629    /* ARB extensions go here, sorted alphabetically.
 630     */
 631    EXT(ARB_ES3_1_compatibility),
 632    EXT(ARB_ES3_2_compatibility),
 633    EXT(ARB_arrays_of_arrays),
 634    EXT(ARB_bindless_texture),
 635    EXT(ARB_compatibility),
 636    EXT(ARB_compute_shader),
 637    EXT(ARB_compute_variable_group_size),
 638    EXT(ARB_conservative_depth),
 639    EXT(ARB_cull_distance),
 640    EXT(ARB_derivative_control),
 641    EXT(ARB_draw_buffers),
 642    EXT(ARB_draw_instanced),
 643    EXT(ARB_enhanced_layouts),
 644    EXT(ARB_explicit_attrib_location),
 645    EXT(ARB_explicit_uniform_location),
 646    EXT(ARB_fragment_coord_conventions),
 647    EXT(ARB_fragment_layer_viewport),
 648    EXT(ARB_fragment_shader_interlock),
 649    EXT(ARB_gpu_shader5),
 650    EXT(ARB_gpu_shader_fp64),
 651    EXT(ARB_gpu_shader_int64),
 652    EXT(ARB_post_depth_coverage),
 653    EXT(ARB_sample_shading),
 654    EXT(ARB_separate_shader_objects),
 655    EXT(ARB_shader_atomic_counter_ops),
 656    EXT(ARB_shader_atomic_counters),
 657    EXT(ARB_shader_ballot),
 658    EXT(ARB_shader_bit_encoding),
 659    EXT(ARB_shader_clock),
 660    EXT(ARB_shader_draw_parameters),
 661    EXT(ARB_shader_group_vote),
 662    EXT(ARB_shader_image_load_store),
 663    EXT(ARB_shader_image_size),
 664    EXT(ARB_shader_precision),
 665    EXT(ARB_shader_stencil_export),
 666    EXT(ARB_shader_storage_buffer_object),
 667    EXT(ARB_shader_subroutine),
 668    EXT(ARB_shader_texture_image_samples),
 669    EXT(ARB_shader_texture_lod),
 670    EXT(ARB_shader_viewport_layer_array),
 671    EXT(ARB_shading_language_420pack),
 672    EXT(ARB_shading_language_include),
 673    EXT(ARB_shading_language_packing),
 674    EXT(ARB_tessellation_shader),
 675    EXT(ARB_texture_cube_map_array),
 676    EXT(ARB_texture_gather),
 677    EXT(ARB_texture_multisample),
 678    EXT(ARB_texture_query_levels),
 679    EXT(ARB_texture_query_lod),
 680    EXT(ARB_texture_rectangle),
 681    EXT(ARB_uniform_buffer_object),
 682    EXT(ARB_vertex_attrib_64bit),
 683    EXT(ARB_viewport_array),
 684
 685    /* KHR extensions go here, sorted alphabetically.
 686     */
 687    EXT_AEP(KHR_blend_equation_advanced),
 688
 689    /* OES extensions go here, sorted alphabetically.
 690     */
 691    EXT(OES_EGL_image_external),
 692    EXT(OES_EGL_image_external_essl3),
 693    EXT(OES_geometry_point_size),
 694    EXT(OES_geometry_shader),
 695    EXT(OES_gpu_shader5),
 696    EXT(OES_primitive_bounding_box),
 697    EXT_AEP(OES_sample_variables),
 698    EXT_AEP(OES_shader_image_atomic),
 699    EXT(OES_shader_io_blocks),
 700    EXT_AEP(OES_shader_multisample_interpolation),
 701    EXT(OES_standard_derivatives),
 702    EXT(OES_tessellation_point_size),
 703    EXT(OES_tessellation_shader),
 704    EXT(OES_texture_3D),
 705    EXT(OES_texture_buffer),
 706    EXT(OES_texture_cube_map_array),
 707    EXT_AEP(OES_texture_storage_multisample_2d_array),
 708    EXT(OES_viewport_array),
 709
 710    /* All other extensions go here, sorted alphabetically.
 711     */
 712    EXT(AMD_conservative_depth),
 713    EXT(AMD_gpu_shader_int64),
 714    EXT(AMD_shader_stencil_export),
 715    EXT(AMD_shader_trinary_minmax),
 716    EXT(AMD_texture_texture4),
 717    EXT(AMD_vertex_shader_layer),
 718    EXT(AMD_vertex_shader_viewport_index),
 719    EXT(ANDROID_extension_pack_es31a),
 720    EXT(EXT_blend_func_extended),
 721    EXT(EXT_demote_to_helper_invocation),
 722    EXT(EXT_frag_depth),
 723    EXT(EXT_draw_buffers),
 724    EXT(EXT_clip_cull_distance),
 725    EXT(EXT_geometry_point_size),
 726    EXT_AEP(EXT_geometry_shader),
 727    EXT(EXT_gpu_shader4),
 728    EXT_AEP(EXT_gpu_shader5),
 729    EXT_AEP(EXT_primitive_bounding_box),
 730    EXT(EXT_separate_shader_objects),
 731    EXT(EXT_shader_framebuffer_fetch),
 732    EXT(EXT_shader_framebuffer_fetch_non_coherent),
 733    EXT(EXT_shader_image_load_formatted),
 734    EXT(EXT_shader_image_load_store),
 735    EXT(EXT_shader_implicit_conversions),
 736    EXT(EXT_shader_integer_mix),
 737    EXT_AEP(EXT_shader_io_blocks),
 738    EXT(EXT_shader_samples_identical),
 739    EXT(EXT_tessellation_point_size),
 740    EXT_AEP(EXT_tessellation_shader),
 741    EXT(EXT_texture_array),
 742    EXT_AEP(EXT_texture_buffer),
 743    EXT_AEP(EXT_texture_cube_map_array),
 744    EXT(EXT_texture_query_lod),
 745    EXT(EXT_texture_shadow_lod),
 746    EXT(INTEL_conservative_rasterization),
 747    EXT(INTEL_shader_atomic_float_minmax),
 748    EXT(MESA_shader_integer_functions),
 749    EXT(NV_compute_shader_derivatives),
 750    EXT(NV_fragment_shader_interlock),
 751    EXT(NV_image_formats),
 752    EXT(NV_shader_atomic_float),
 753 };
 754
 755 #undef EXT
 756
 757
 758 /**
 759  * Determine whether a given extension is compatible with the target,
 760  * API, and extension information in the current parser state.
 761  */
 762 bool _mesa_glsl_extension::compatible_with_state(
 763       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 764 {
 765    return this->available_pred(state->ctx, api, gl_version);
 766 }
 767
 768 /**
 769  * Set the appropriate flags in the parser state to establish the
 770  * given behavior for this extension.
 771  */
 772 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 773                                      ext_behavior behavior) const
 774 {
 775    /* Note: the ->* operator indexes into state by the
 776     * offsets this->enable_flag and this->warn_flag.  See
 777     * _mesa_glsl_extension::supported_flag for more info.
 778     */
 779    state->*(this->enable_flag) = (behavior != extension_disable);
 780    state->*(this->warn_flag)   = (behavior == extension_warn);
 781 }
 782
 783 /**
 784  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 785  * the name is not found, return NULL.
 786  */
 787 static const _mesa_glsl_extension *find_extension(const char *name)
 788 {
 789    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 790       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 791          return &_mesa_glsl_supported_extensions[i];
 792       }
 793    }
 794    return NULL;
 795 }
 796
 797 bool
 798 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 799                              const char *behavior_string, YYLTYPE *behavior_locp,
 800                              _mesa_glsl_parse_state *state)
 801 {
 802    uint8_t gl_version = state->ctx->Extensions.Version;
 803    gl_api api = state->ctx->API;
 804    ext_behavior behavior;
 805    if (strcmp(behavior_string, "warn") == 0) {
 806       behavior = extension_warn;
 807    } else if (strcmp(behavior_string, "require") == 0) {
 808       behavior = extension_require;
 809    } else if (strcmp(behavior_string, "enable") == 0) {
 810       behavior = extension_enable;
 811    } else if (strcmp(behavior_string, "disable") == 0) {
 812       behavior = extension_disable;
 813    } else {
 814       _mesa_glsl_error(behavior_locp, state,
 815                        "unknown extension behavior `%s'",
 816                        behavior_string);
 817       return false;
 818    }
 819
 820    /* If we're in a desktop context but with an ES shader, use an ES API enum
 821     * to verify extension availability.
 822     */
 823    if (state->es_shader && api != API_OPENGLES2)
 824       api = API_OPENGLES2;
 825    /* Use the language-version derived GL version to extension checks, unless
 826     * we're using meta, which sets the version to the max.
 827     */
 828    if (gl_version != 0xff)
 829       gl_version = state->gl_version;
 830
 831    if (strcmp(name, "all") == 0) {
 832       if ((behavior == extension_enable) || (behavior == extension_require)) {
 833          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 834                           (behavior == extension_enable)
 835                           ? "enable" : "require");
 836          return false;
 837       } else {
 838          for (unsigned i = 0;
 839               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 840             const _mesa_glsl_extension *extension
 841                = &_mesa_glsl_supported_extensions[i];
 842             if (extension->compatible_with_state(state, api, gl_version)) {
 843                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 844             }
 845          }
 846       }
 847    } else {
 848       const _mesa_glsl_extension *extension = find_extension(name);
 849       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 850          extension->set_flags(state, behavior);
 851          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 852             for (unsigned i = 0;
 853                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 854                const _mesa_glsl_extension *extension =
 855                   &_mesa_glsl_supported_extensions[i];
 856
 857                if (!extension->aep)
 858                   continue;
 859                /* AEP should not be enabled if all of the sub-extensions can't
 860                 * also be enabled. This is not the proper layer to do such
 861                 * error-checking though.
 862                 */
 863                assert(extension->compatible_with_state(state, api, gl_version));
 864                extension->set_flags(state, behavior);
 865             }
 866          }
 867       } else {
 868          static const char fmt[] = "extension `%s' unsupported in %s shader";
 869
 870          if (behavior == extension_require) {
 871             _mesa_glsl_error(name_locp, state, fmt,
 872                              name, _mesa_shader_stage_to_string(state->stage));
 873             return false;
 874          } else {
 875             _mesa_glsl_warning(name_locp, state, fmt,
 876                                name, _mesa_shader_stage_to_string(state->stage));
 877          }
 878       }
 879    }
 880
 881    return true;
 882 }
 883
 884
 885 /**
 886  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 887  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 888  * (process_array_constructor, et al) sufficient information to do type
 889  * checking.
 890  *
 891  * Operates on assignments involving an aggregate initializer. E.g.,
 892  *
 893  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 894  *
 895  * or more ridiculously,
 896  *
 897  * struct S {
 898  *     vec4 v[2];
 899  * };
 900  *
 901  * struct {
 902  *     S a[2], b;
 903  *     int c;
 904  * } aggregate = {
 905  *     {
 906  *         {
 907  *             {
 908  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 909  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 910  *             } // a[0].v
 911  *         }, // a[0]
 912  *         {
 913  *             {
 914  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 915  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 916  *             } // a[1].v
 917  *         } // a[1]
 918  *     }, // a
 919  *     {
 920  *         {
 921  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 922  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 923  *         } // b.v
 924  *     }, // b
 925  *     4 // c
 926  * };
 927  *
 928  * This pass is necessary because the right-hand side of <type> e = { ... }
 929  * doesn't contain sufficient information to determine if the types match.
 930  */
 931 void
 932 _mesa_ast_set_aggregate_type(const glsl_type *type,
 933                              ast_expression *expr)
 934 {
 935    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 936    ai->constructor_type = type;
 937
 938    /* If the aggregate is an array, recursively set its elements' types. */
 939    if (type->is_array()) {
 940       /* Each array element has the type type->fields.array.
 941        *
 942        * E.g., if <type> if struct S[2] we want to set each element's type to
 943        * struct S.
 944        */
 945       for (exec_node *expr_node = ai->expressions.get_head_raw();
 946            !expr_node->is_tail_sentinel();
 947            expr_node = expr_node->next) {
 948          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 949                                                link);
 950
 951          if (expr->oper == ast_aggregate)
 952             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 953       }
 954
 955    /* If the aggregate is a struct, recursively set its fields' types. */
 956    } else if (type->is_struct()) {
 957       exec_node *expr_node = ai->expressions.get_head_raw();
 958
 959       /* Iterate through the struct's fields. */
 960       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 961            i++, expr_node = expr_node->next) {
 962          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 963                                                link);
 964
 965          if (expr->oper == ast_aggregate) {
 966             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 967          }
 968       }
 969    /* If the aggregate is a matrix, set its columns' types. */
 970    } else if (type->is_matrix()) {
 971       for (exec_node *expr_node = ai->expressions.get_head_raw();
 972            !expr_node->is_tail_sentinel();
 973            expr_node = expr_node->next) {
 974          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 975                                                link);
 976
 977          if (expr->oper == ast_aggregate)
 978             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 979       }
 980    }
 981 }
 982
 983 void
 984 _mesa_ast_process_interface_block(YYLTYPE *locp,
 985                                   _mesa_glsl_parse_state *state,
 986                                   ast_interface_block *const block,
 987                                   const struct ast_type_qualifier &q)
 988 {
 989    if (q.flags.q.buffer) {
 990       if (!state->has_shader_storage_buffer_objects()) {
 991          _mesa_glsl_error(locp, state,
 992                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 993                           "required for defining shader storage blocks");
 994       } else if (state->ARB_shader_storage_buffer_object_warn) {
 995          _mesa_glsl_warning(locp, state,
 996                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 997                             "required for defining shader storage blocks");
 998       }
 999    } else if (q.flags.q.uniform) {
1000       if (!state->has_uniform_buffer_objects()) {
1001          _mesa_glsl_error(locp, state,
1002                           "#version 140 / GL_ARB_uniform_buffer_object "
1003                           "required for defining uniform blocks");
1004       } else if (state->ARB_uniform_buffer_object_warn) {
1005          _mesa_glsl_warning(locp, state,
1006                             "#version 140 / GL_ARB_uniform_buffer_object "
1007                             "required for defining uniform blocks");
1008       }
1009    } else {
1010       if (!state->has_shader_io_blocks()) {
1011          if (state->es_shader) {
1012             _mesa_glsl_error(locp, state,
1013                              "GL_OES_shader_io_blocks or #version 320 "
1014                              "required for using interface blocks");
1015          } else {
1016             _mesa_glsl_error(locp, state,
1017                              "#version 150 required for using "
1018                              "interface blocks");
1019          }
1020       }
1021    }
1022
1023    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
1024     * "It is illegal to have an input block in a vertex shader
1025     *  or an output block in a fragment shader"
1026     */
1027    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
1028       _mesa_glsl_error(locp, state,
1029                        "`in' interface block is not allowed for "
1030                        "a vertex shader");
1031    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1032       _mesa_glsl_error(locp, state,
1033                        "`out' interface block is not allowed for "
1034                        "a fragment shader");
1035    }
1036
1037    /* Since block arrays require names, and both features are added in
1038     * the same language versions, we don't have to explicitly
1039     * version-check both things.
1040     */
1041    if (block->instance_name != NULL) {
1042       state->check_version(150, 300, locp, "interface blocks with "
1043                            "an instance name are not allowed");
1044    }
1045
1046    ast_type_qualifier::bitset_t interface_type_mask;
1047    struct ast_type_qualifier temp_type_qualifier;
1048
1049    /* Get a bitmask containing only the in/out/uniform/buffer
1050     * flags, allowing us to ignore other irrelevant flags like
1051     * interpolation qualifiers.
1052     */
1053    temp_type_qualifier.flags.i = 0;
1054    temp_type_qualifier.flags.q.uniform = true;
1055    temp_type_qualifier.flags.q.in = true;
1056    temp_type_qualifier.flags.q.out = true;
1057    temp_type_qualifier.flags.q.buffer = true;
1058    temp_type_qualifier.flags.q.patch = true;
1059    interface_type_mask = temp_type_qualifier.flags.i;
1060
1061    /* Get the block's interface qualifier.  The interface_qualifier
1062     * production rule guarantees that only one bit will be set (and
1063     * it will be in/out/uniform).
1064     */
1065    ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1066
1067    block->default_layout.flags.i |= block_interface_qualifier;
1068
1069    if (state->stage == MESA_SHADER_GEOMETRY &&
1070        state->has_explicit_attrib_stream() &&
1071        block->default_layout.flags.q.out) {
1072       /* Assign global layout's stream value. */
1073       block->default_layout.flags.q.stream = 1;
1074       block->default_layout.flags.q.explicit_stream = 0;
1075       block->default_layout.stream = state->out_qualifier->stream;
1076    }
1077
1078    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1079       /* Assign global layout's xfb_buffer value. */
1080       block->default_layout.flags.q.xfb_buffer = 1;
1081       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1082       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1083    }
1084
1085    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1086       ast_type_qualifier& qualifier = member->type->qualifier;
1087       if ((qualifier.flags.i & interface_type_mask) == 0) {
1088          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1089           * "If no optional qualifier is used in a member declaration, the
1090           *  qualifier of the variable is just in, out, or uniform as declared
1091           *  by interface-qualifier."
1092           */
1093          qualifier.flags.i |= block_interface_qualifier;
1094       } else if ((qualifier.flags.i & interface_type_mask) !=
1095                  block_interface_qualifier) {
1096          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1097           * "If optional qualifiers are used, they can include interpolation
1098           *  and storage qualifiers and they must declare an input, output,
1099           *  or uniform variable consistent with the interface qualifier of
1100           *  the block."
1101           */
1102          _mesa_glsl_error(locp, state,
1103                           "uniform/in/out qualifier on "
1104                           "interface block member does not match "
1105                           "the interface block");
1106       }
1107
1108       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1109          _mesa_glsl_error(locp, state,
1110                           "invariant qualifiers can be used only "
1111                           "in interface block members for shader "
1112                           "inputs or outputs");
1113    }
1114 }
1115
1116 static void
1117 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1118 {
1119    if (q->is_subroutine_decl())
1120       printf("subroutine ");
1121
1122    if (q->subroutine_list) {
1123       printf("subroutine (");
1124       q->subroutine_list->print();
1125       printf(")");
1126    }
1127
1128    if (q->flags.q.constant)
1129       printf("const ");
1130
1131    if (q->flags.q.invariant)
1132       printf("invariant ");
1133
1134    if (q->flags.q.attribute)
1135       printf("attribute ");
1136
1137    if (q->flags.q.varying)
1138       printf("varying ");
1139
1140    if (q->flags.q.in && q->flags.q.out)
1141       printf("inout ");
1142    else {
1143       if (q->flags.q.in)
1144          printf("in ");
1145
1146       if (q->flags.q.out)
1147          printf("out ");
1148    }
1149
1150    if (q->flags.q.centroid)
1151       printf("centroid ");
1152    if (q->flags.q.sample)
1153       printf("sample ");
1154    if (q->flags.q.patch)
1155       printf("patch ");
1156    if (q->flags.q.uniform)
1157       printf("uniform ");
1158    if (q->flags.q.buffer)
1159       printf("buffer ");
1160    if (q->flags.q.smooth)
1161       printf("smooth ");
1162    if (q->flags.q.flat)
1163       printf("flat ");
1164    if (q->flags.q.noperspective)
1165       printf("noperspective ");
1166 }
1167
1168
1169 void
1170 ast_node::print(void) const
1171 {
1172    printf("unhandled node ");
1173 }
1174
1175
1176 ast_node::ast_node(void)
1177 {
1178    this->location.source = 0;
1179    this->location.first_line = 0;
1180    this->location.first_column = 0;
1181    this->location.last_line = 0;
1182    this->location.last_column = 0;
1183 }
1184
1185
1186 static void
1187 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1188 {
1189    if (array_specifier)
1190       array_specifier->print();
1191 }
1192
1193
1194 void
1195 ast_compound_statement::print(void) const
1196 {
1197    printf("{\n");
1198
1199    foreach_list_typed(ast_node, ast, link, &this->statements) {
1200       ast->print();
1201    }
1202
1203    printf("}\n");
1204 }
1205
1206
1207 ast_compound_statement::ast_compound_statement(int new_scope,
1208                                                ast_node *statements)
1209 {
1210    this->new_scope = new_scope;
1211
1212    if (statements != NULL) {
1213       this->statements.push_degenerate_list_at_head(&statements->link);
1214    }
1215 }
1216
1217
1218 void
1219 ast_expression::print(void) const
1220 {
1221    switch (oper) {
1222    case ast_assign:
1223    case ast_mul_assign:
1224    case ast_div_assign:
1225    case ast_mod_assign:
1226    case ast_add_assign:
1227    case ast_sub_assign:
1228    case ast_ls_assign:
1229    case ast_rs_assign:
1230    case ast_and_assign:
1231    case ast_xor_assign:
1232    case ast_or_assign:
1233       subexpressions[0]->print();
1234       printf("%s ", operator_string(oper));
1235       subexpressions[1]->print();
1236       break;
1237
1238    case ast_field_selection:
1239       subexpressions[0]->print();
1240       printf(". %s ", primary_expression.identifier);
1241       break;
1242
1243    case ast_plus:
1244    case ast_neg:
1245    case ast_bit_not:
1246    case ast_logic_not:
1247    case ast_pre_inc:
1248    case ast_pre_dec:
1249       printf("%s ", operator_string(oper));
1250       subexpressions[0]->print();
1251       break;
1252
1253    case ast_post_inc:
1254    case ast_post_dec:
1255       subexpressions[0]->print();
1256       printf("%s ", operator_string(oper));
1257       break;
1258
1259    case ast_conditional:
1260       subexpressions[0]->print();
1261       printf("? ");
1262       subexpressions[1]->print();
1263       printf(": ");
1264       subexpressions[2]->print();
1265       break;
1266
1267    case ast_array_index:
1268       subexpressions[0]->print();
1269       printf("[ ");
1270       subexpressions[1]->print();
1271       printf("] ");
1272       break;
1273
1274    case ast_function_call: {
1275       subexpressions[0]->print();
1276       printf("( ");
1277
1278       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1279          if (&ast->link != this->expressions.get_head())
1280             printf(", ");
1281
1282          ast->print();
1283       }
1284
1285       printf(") ");
1286       break;
1287    }
1288
1289    case ast_identifier:
1290       printf("%s ", primary_expression.identifier);
1291       break;
1292
1293    case ast_int_constant:
1294       printf("%d ", primary_expression.int_constant);
1295       break;
1296
1297    case ast_uint_constant:
1298       printf("%u ", primary_expression.uint_constant);
1299       break;
1300
1301    case ast_float_constant:
1302       printf("%f ", primary_expression.float_constant);
1303       break;
1304
1305    case ast_double_constant:
1306       printf("%f ", primary_expression.double_constant);
1307       break;
1308
1309    case ast_int64_constant:
1310       printf("%" PRId64 " ", primary_expression.int64_constant);
1311       break;
1312
1313    case ast_uint64_constant:
1314       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1315       break;
1316
1317    case ast_bool_constant:
1318       printf("%s ",
1319              primary_expression.bool_constant
1320              ? "true" : "false");
1321       break;
1322
1323    case ast_sequence: {
1324       printf("( ");
1325       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1326          if (&ast->link != this->expressions.get_head())
1327             printf(", ");
1328
1329          ast->print();
1330       }
1331       printf(") ");
1332       break;
1333    }
1334
1335    case ast_aggregate: {
1336       printf("{ ");
1337       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1338          if (&ast->link != this->expressions.get_head())
1339             printf(", ");
1340
1341          ast->print();
1342       }
1343       printf("} ");
1344       break;
1345    }
1346
1347    default:
1348       assert(0);
1349       break;
1350    }
1351 }
1352
1353 ast_expression::ast_expression(int oper,
1354                                ast_expression *ex0,
1355                                ast_expression *ex1,
1356                                ast_expression *ex2) :
1357    primary_expression()
1358 {
1359    this->oper = ast_operators(oper);
1360    this->subexpressions[0] = ex0;
1361    this->subexpressions[1] = ex1;
1362    this->subexpressions[2] = ex2;
1363    this->non_lvalue_description = NULL;
1364    this->is_lhs = false;
1365 }
1366
1367
1368 void
1369 ast_expression_statement::print(void) const
1370 {
1371    if (expression)
1372       expression->print();
1373
1374    printf("; ");
1375 }
1376
1377
1378 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1379    expression(ex)
1380 {
1381    /* empty */
1382 }
1383
1384
1385 void
1386 ast_function::print(void) const
1387 {
1388    return_type->print();
1389    printf(" %s (", identifier);
1390
1391    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1392       ast->print();
1393    }
1394
1395    printf(")");
1396 }
1397
1398
1399 ast_function::ast_function(void)
1400    : return_type(NULL), identifier(NULL), is_definition(false),
1401      signature(NULL)
1402 {
1403    /* empty */
1404 }
1405
1406
1407 void
1408 ast_fully_specified_type::print(void) const
1409 {
1410    _mesa_ast_type_qualifier_print(& qualifier);
1411    specifier->print();
1412 }
1413
1414
1415 void
1416 ast_parameter_declarator::print(void) const
1417 {
1418    type->print();
1419    if (identifier)
1420       printf("%s ", identifier);
1421    ast_opt_array_dimensions_print(array_specifier);
1422 }
1423
1424
1425 void
1426 ast_function_definition::print(void) const
1427 {
1428    prototype->print();
1429    body->print();
1430 }
1431
1432
1433 void
1434 ast_declaration::print(void) const
1435 {
1436    printf("%s ", identifier);
1437    ast_opt_array_dimensions_print(array_specifier);
1438
1439    if (initializer) {
1440       printf("= ");
1441       initializer->print();
1442    }
1443 }
1444
1445
1446 ast_declaration::ast_declaration(const char *identifier,
1447                                  ast_array_specifier *array_specifier,
1448                                  ast_expression *initializer)
1449 {
1450    this->identifier = identifier;
1451    this->array_specifier = array_specifier;
1452    this->initializer = initializer;
1453 }
1454
1455
1456 void
1457 ast_declarator_list::print(void) const
1458 {
1459    assert(type || invariant);
1460
1461    if (type)
1462       type->print();
1463    else if (invariant)
1464       printf("invariant ");
1465    else
1466       printf("precise ");
1467
1468    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1469       if (&ast->link != this->declarations.get_head())
1470          printf(", ");
1471
1472       ast->print();
1473    }
1474
1475    printf("; ");
1476 }
1477
1478
1479 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1480 {
1481    this->type = type;
1482    this->invariant = false;
1483    this->precise = false;
1484 }
1485
1486 void
1487 ast_jump_statement::print(void) const
1488 {
1489    switch (mode) {
1490    case ast_continue:
1491       printf("continue; ");
1492       break;
1493    case ast_break:
1494       printf("break; ");
1495       break;
1496    case ast_return:
1497       printf("return ");
1498       if (opt_return_value)
1499          opt_return_value->print();
1500
1501       printf("; ");
1502       break;
1503    case ast_discard:
1504       printf("discard; ");
1505       break;
1506    }
1507 }
1508
1509
1510 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1511    : opt_return_value(NULL)
1512 {
1513    this->mode = ast_jump_modes(mode);
1514
1515    if (mode == ast_return)
1516       opt_return_value = return_value;
1517 }
1518
1519
1520 void
1521 ast_demote_statement::print(void) const
1522 {
1523    printf("demote; ");
1524 }
1525
1526
1527 void
1528 ast_selection_statement::print(void) const
1529 {
1530    printf("if ( ");
1531    condition->print();
1532    printf(") ");
1533
1534    then_statement->print();
1535
1536    if (else_statement) {
1537       printf("else ");
1538       else_statement->print();
1539    }
1540 }
1541
1542
1543 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1544                                                  ast_node *then_statement,
1545                                                  ast_node *else_statement)
1546 {
1547    this->condition = condition;
1548    this->then_statement = then_statement;
1549    this->else_statement = else_statement;
1550 }
1551
1552
1553 void
1554 ast_switch_statement::print(void) const
1555 {
1556    printf("switch ( ");
1557    test_expression->print();
1558    printf(") ");
1559
1560    body->print();
1561 }
1562
1563
1564 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1565                                            ast_node *body)
1566 {
1567    this->test_expression = test_expression;
1568    this->body = body;
1569 }
1570
1571
1572 void
1573 ast_switch_body::print(void) const
1574 {
1575    printf("{\n");
1576    if (stmts != NULL) {
1577       stmts->print();
1578    }
1579    printf("}\n");
1580 }
1581
1582
1583 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1584 {
1585    this->stmts = stmts;
1586 }
1587
1588
1589 void ast_case_label::print(void) const
1590 {
1591    if (test_value != NULL) {
1592       printf("case ");
1593       test_value->print();
1594       printf(": ");
1595    } else {
1596       printf("default: ");
1597    }
1598 }
1599
1600
1601 ast_case_label::ast_case_label(ast_expression *test_value)
1602 {
1603    this->test_value = test_value;
1604 }
1605
1606
1607 void ast_case_label_list::print(void) const
1608 {
1609    foreach_list_typed(ast_node, ast, link, & this->labels) {
1610       ast->print();
1611    }
1612    printf("\n");
1613 }
1614
1615
1616 ast_case_label_list::ast_case_label_list(void)
1617 {
1618 }
1619
1620
1621 void ast_case_statement::print(void) const
1622 {
1623    labels->print();
1624    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1625       ast->print();
1626       printf("\n");
1627    }
1628 }
1629
1630
1631 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1632 {
1633    this->labels = labels;
1634 }
1635
1636
1637 void ast_case_statement_list::print(void) const
1638 {
1639    foreach_list_typed(ast_node, ast, link, & this->cases) {
1640       ast->print();
1641    }
1642 }
1643
1644
1645 ast_case_statement_list::ast_case_statement_list(void)
1646 {
1647 }
1648
1649
1650 void
1651 ast_iteration_statement::print(void) const
1652 {
1653    switch (mode) {
1654    case ast_for:
1655       printf("for( ");
1656       if (init_statement)
1657          init_statement->print();
1658       printf("; ");
1659
1660       if (condition)
1661          condition->print();
1662       printf("; ");
1663
1664       if (rest_expression)
1665          rest_expression->print();
1666       printf(") ");
1667
1668       body->print();
1669       break;
1670
1671    case ast_while:
1672       printf("while ( ");
1673       if (condition)
1674          condition->print();
1675       printf(") ");
1676       body->print();
1677       break;
1678
1679    case ast_do_while:
1680       printf("do ");
1681       body->print();
1682       printf("while ( ");
1683       if (condition)
1684          condition->print();
1685       printf("); ");
1686       break;
1687    }
1688 }
1689
1690
1691 ast_iteration_statement::ast_iteration_statement(int mode,
1692                                                  ast_node *init,
1693                                                  ast_node *condition,
1694                                                  ast_expression *rest_expression,
1695                                                  ast_node *body)
1696 {
1697    this->mode = ast_iteration_modes(mode);
1698    this->init_statement = init;
1699    this->condition = condition;
1700    this->rest_expression = rest_expression;
1701    this->body = body;
1702 }
1703
1704
1705 void
1706 ast_struct_specifier::print(void) const
1707 {
1708    printf("struct %s { ", name);
1709    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1710       ast->print();
1711    }
1712    printf("} ");
1713 }
1714
1715
1716 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1717                                            ast_declarator_list *declarator_list)
1718    : name(identifier), layout(NULL), declarations(), is_declaration(true),
1719      type(NULL)
1720 {
1721    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1722 }
1723
1724 void ast_subroutine_list::print(void) const
1725 {
1726    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1727       if (&ast->link != this->declarations.get_head())
1728          printf(", ");
1729       ast->print();
1730    }
1731 }
1732
1733 static void
1734 set_shader_inout_layout(struct gl_shader *shader,
1735                      struct _mesa_glsl_parse_state *state)
1736 {
1737    /* Should have been prevented by the parser. */
1738    if (shader->Stage != MESA_SHADER_GEOMETRY &&
1739        shader->Stage != MESA_SHADER_TESS_EVAL &&
1740        shader->Stage != MESA_SHADER_COMPUTE) {
1741       assert(!state->in_qualifier->flags.i);
1742    }
1743
1744    if (shader->Stage != MESA_SHADER_COMPUTE) {
1745       /* Should have been prevented by the parser. */
1746       assert(!state->cs_input_local_size_specified);
1747       assert(!state->cs_input_local_size_variable_specified);
1748       assert(state->cs_derivative_group == DERIVATIVE_GROUP_NONE);
1749    }
1750
1751    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1752       /* Should have been prevented by the parser. */
1753       assert(!state->fs_uses_gl_fragcoord);
1754       assert(!state->fs_redeclares_gl_fragcoord);
1755       assert(!state->fs_pixel_center_integer);
1756       assert(!state->fs_origin_upper_left);
1757       assert(!state->fs_early_fragment_tests);
1758       assert(!state->fs_inner_coverage);
1759       assert(!state->fs_post_depth_coverage);
1760       assert(!state->fs_pixel_interlock_ordered);
1761       assert(!state->fs_pixel_interlock_unordered);
1762       assert(!state->fs_sample_interlock_ordered);
1763       assert(!state->fs_sample_interlock_unordered);
1764    }
1765
1766    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1767       if (state->out_qualifier->out_xfb_stride[i]) {
1768          unsigned xfb_stride;
1769          if (state->out_qualifier->out_xfb_stride[i]->
1770                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1771                 true)) {
1772             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1773          }
1774       }
1775    }
1776
1777    switch (shader->Stage) {
1778    case MESA_SHADER_TESS_CTRL:
1779       shader->info.TessCtrl.VerticesOut = 0;
1780       if (state->tcs_output_vertices_specified) {
1781          unsigned vertices;
1782          if (state->out_qualifier->vertices->
1783                process_qualifier_constant(state, "vertices", &vertices,
1784                                           false)) {
1785
1786             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1787             if (vertices > state->Const.MaxPatchVertices) {
1788                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1789                                 "GL_MAX_PATCH_VERTICES", vertices);
1790             }
1791             shader->info.TessCtrl.VerticesOut = vertices;
1792          }
1793       }
1794       break;
1795    case MESA_SHADER_TESS_EVAL:
1796       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1797       if (state->in_qualifier->flags.q.prim_type)
1798          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1799
1800       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1801       if (state->in_qualifier->flags.q.vertex_spacing)
1802          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1803
1804       shader->info.TessEval.VertexOrder = 0;
1805       if (state->in_qualifier->flags.q.ordering)
1806          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1807
1808       shader->info.TessEval.PointMode = -1;
1809       if (state->in_qualifier->flags.q.point_mode)
1810          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1811       break;
1812    case MESA_SHADER_GEOMETRY:
1813       shader->info.Geom.VerticesOut = -1;
1814       if (state->out_qualifier->flags.q.max_vertices) {
1815          unsigned qual_max_vertices;
1816          if (state->out_qualifier->max_vertices->
1817                process_qualifier_constant(state, "max_vertices",
1818                                           &qual_max_vertices, true)) {
1819
1820             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1821                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1822                _mesa_glsl_error(&loc, state,
1823                                 "maximum output vertices (%d) exceeds "
1824                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1825                                 qual_max_vertices);
1826             }
1827             shader->info.Geom.VerticesOut = qual_max_vertices;
1828          }
1829       }
1830
1831       if (state->gs_input_prim_type_specified) {
1832          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1833       } else {
1834          shader->info.Geom.InputType = PRIM_UNKNOWN;
1835       }
1836
1837       if (state->out_qualifier->flags.q.prim_type) {
1838          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1839       } else {
1840          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1841       }
1842
1843       shader->info.Geom.Invocations = 0;
1844       if (state->in_qualifier->flags.q.invocations) {
1845          unsigned invocations;
1846          if (state->in_qualifier->invocations->
1847                process_qualifier_constant(state, "invocations",
1848                                           &invocations, false)) {
1849
1850             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1851             if (invocations > state->Const.MaxGeometryShaderInvocations) {
1852                _mesa_glsl_error(&loc, state,
1853                                 "invocations (%d) exceeds "
1854                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1855                                 invocations);
1856             }
1857             shader->info.Geom.Invocations = invocations;
1858          }
1859       }
1860       break;
1861
1862    case MESA_SHADER_COMPUTE:
1863       if (state->cs_input_local_size_specified) {
1864          for (int i = 0; i < 3; i++)
1865             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1866       } else {
1867          for (int i = 0; i < 3; i++)
1868             shader->info.Comp.LocalSize[i] = 0;
1869       }
1870
1871       shader->info.Comp.LocalSizeVariable =
1872          state->cs_input_local_size_variable_specified;
1873
1874       shader->info.Comp.DerivativeGroup = state->cs_derivative_group;
1875
1876       if (state->NV_compute_shader_derivatives_enable) {
1877          /* We allow multiple cs_input_layout nodes, but do not store them in
1878           * a convenient place, so for now live with an empty location error.
1879           */
1880          YYLTYPE loc = {0};
1881          if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_QUADS) {
1882             if (shader->info.Comp.LocalSize[0] % 2 != 0) {
1883                _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1884                                 "local group size whose first dimension "
1885                                 "is a multiple of 2\n");
1886             }
1887             if (shader->info.Comp.LocalSize[1] % 2 != 0) {
1888                _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1889                                 "local group size whose second dimension "
1890                                 "is a multiple of 2\n");
1891             }
1892          } else if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_LINEAR) {
1893             if ((shader->info.Comp.LocalSize[0] *
1894                  shader->info.Comp.LocalSize[1] *
1895                  shader->info.Comp.LocalSize[2]) % 4 != 0) {
1896                _mesa_glsl_error(&loc, state, "derivative_group_linearNV must be used with a "
1897                             "local group size whose total number of invocations "
1898                             "is a multiple of 4\n");
1899             }
1900          }
1901       }
1902
1903       break;
1904
1905    case MESA_SHADER_FRAGMENT:
1906       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1907       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1908       shader->pixel_center_integer = state->fs_pixel_center_integer;
1909       shader->origin_upper_left = state->fs_origin_upper_left;
1910       shader->ARB_fragment_coord_conventions_enable =
1911          state->ARB_fragment_coord_conventions_enable;
1912       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1913       shader->InnerCoverage = state->fs_inner_coverage;
1914       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1915       shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
1916       shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
1917       shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
1918       shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
1919       shader->BlendSupport = state->fs_blend_support;
1920       break;
1921
1922    default:
1923       /* Nothing to do. */
1924       break;
1925    }
1926
1927    shader->bindless_sampler = state->bindless_sampler_specified;
1928    shader->bindless_image = state->bindless_image_specified;
1929    shader->bound_sampler = state->bound_sampler_specified;
1930    shader->bound_image = state->bound_image_specified;
1931 }
1932
1933 /* src can be NULL if only the symbols found in the exec_list should be
1934  * copied
1935  */
1936 void
1937 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1938                                    struct glsl_symbol_table *src,
1939                                    struct glsl_symbol_table *dest)
1940 {
1941    foreach_in_list (ir_instruction, ir, shader_ir) {
1942       switch (ir->ir_type) {
1943       case ir_type_function:
1944          dest->add_function((ir_function *) ir);
1945          break;
1946       case ir_type_variable: {
1947          ir_variable *const var = (ir_variable *) ir;
1948
1949          if (var->data.mode != ir_var_temporary)
1950             dest->add_variable(var);
1951          break;
1952       }
1953       default:
1954          break;
1955       }
1956    }
1957
1958    if (src != NULL) {
1959       /* Explicitly copy the gl_PerVertex interface definitions because these
1960        * are needed to check they are the same during the interstage link.
1961        * They can’t necessarily be found via the exec_list because the members
1962        * might not be referenced. The GL spec still requires that they match
1963        * in that case.
1964        */
1965       const glsl_type *iface =
1966          src->get_interface("gl_PerVertex", ir_var_shader_in);
1967       if (iface)
1968          dest->add_interface(iface->name, iface, ir_var_shader_in);
1969
1970       iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1971       if (iface)
1972          dest->add_interface(iface->name, iface, ir_var_shader_out);
1973    }
1974 }
1975
1976 extern "C" {
1977
1978 static void
1979 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1980 {
1981    int j, k;
1982    int index = 0;
1983
1984    for (j = 0; j < state->num_subroutines; j++) {
1985       while (state->subroutines[j]->subroutine_index == -1) {
1986          for (k = 0; k < state->num_subroutines; k++) {
1987             if (state->subroutines[k]->subroutine_index == index)
1988                break;
1989             else if (k == state->num_subroutines - 1) {
1990                state->subroutines[j]->subroutine_index = index;
1991             }
1992          }
1993          index++;
1994       }
1995    }
1996 }
1997
1998 static void
1999 add_builtin_defines(struct _mesa_glsl_parse_state *state,
2000                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
2001                     struct glcpp_parser *data,
2002                     unsigned version,
2003                     bool es)
2004 {
2005    unsigned gl_version = state->ctx->Extensions.Version;
2006    gl_api api = state->ctx->API;
2007
2008    if (gl_version != 0xff) {
2009       unsigned i;
2010       for (i = 0; i < state->num_supported_versions; i++) {
2011          if (state->supported_versions[i].ver == version &&
2012              state->supported_versions[i].es == es) {
2013             gl_version = state->supported_versions[i].gl_ver;
2014             break;
2015          }
2016       }
2017
2018       if (i == state->num_supported_versions)
2019          return;
2020    }
2021
2022    if (es)
2023       api = API_OPENGLES2;
2024
2025    for (unsigned i = 0;
2026         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
2027       const _mesa_glsl_extension *extension
2028          = &_mesa_glsl_supported_extensions[i];
2029       if (extension->compatible_with_state(state, api, gl_version)) {
2030          add_builtin_define(data, extension->name, 1);
2031       }
2032    }
2033 }
2034
2035 /* Implements parsing checks that we can't do during parsing */
2036 static void
2037 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
2038 {
2039    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
2040       YYLTYPE loc;
2041       memset(&loc, 0, sizeof(loc));
2042       _mesa_glsl_error(&loc, state, "Compute shaders require "
2043                        "GLSL 4.30 or GLSL ES 3.10");
2044    }
2045 }
2046
2047 static void
2048 opt_shader_and_create_symbol_table(struct gl_context *ctx,
2049                                    struct glsl_symbol_table *source_symbols,
2050                                    struct gl_shader *shader)
2051 {
2052    assert(shader->CompileStatus != COMPILE_FAILURE &&
2053           !shader->ir->is_empty());
2054
2055    struct gl_shader_compiler_options *options =
2056       &ctx->Const.ShaderCompilerOptions[shader->Stage];
2057
2058    /* Do some optimization at compile time to reduce shader IR size
2059     * and reduce later work if the same shader is linked multiple times
2060     */
2061    if (ctx->Const.GLSLOptimizeConservatively) {
2062       /* Run it just once. */
2063       do_common_optimization(shader->ir, false, false, options,
2064                              ctx->Const.NativeIntegers);
2065    } else {
2066       /* Repeat it until it stops making changes. */
2067       while (do_common_optimization(shader->ir, false, false, options,
2068                                     ctx->Const.NativeIntegers))
2069          ;
2070    }
2071
2072    validate_ir_tree(shader->ir);
2073
2074    enum ir_variable_mode other;
2075    switch (shader->Stage) {
2076    case MESA_SHADER_VERTEX:
2077       other = ir_var_shader_in;
2078       break;
2079    case MESA_SHADER_FRAGMENT:
2080       other = ir_var_shader_out;
2081       break;
2082    default:
2083       /* Something invalid to ensure optimize_dead_builtin_uniforms
2084        * doesn't remove anything other than uniforms or constants.
2085        */
2086       other = ir_var_mode_count;
2087       break;
2088    }
2089
2090    optimize_dead_builtin_variables(shader->ir, other);
2091
2092    validate_ir_tree(shader->ir);
2093
2094    /* Retain any live IR, but trash the rest. */
2095    reparent_ir(shader->ir, shader->ir);
2096
2097    /* Destroy the symbol table.  Create a new symbol table that contains only
2098     * the variables and functions that still exist in the IR.  The symbol
2099     * table will be used later during linking.
2100     *
2101     * There must NOT be any freed objects still referenced by the symbol
2102     * table.  That could cause the linker to dereference freed memory.
2103     *
2104     * We don't have to worry about types or interface-types here because those
2105     * are fly-weights that are looked up by glsl_type.
2106     */
2107    _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2108                                       shader->symbols);
2109 }
2110
2111 void
2112 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2113                           bool dump_ast, bool dump_hir, bool force_recompile)
2114 {
2115    const char *source = force_recompile && shader->FallbackSource ?
2116       shader->FallbackSource : shader->Source;
2117
2118    if (!force_recompile) {
2119       if (ctx->Cache) {
2120          char buf[41];
2121          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2122                                 shader->sha1);
2123          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2124             /* We've seen this shader before and know it compiles */
2125             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2126                _mesa_sha1_format(buf, shader->sha1);
2127                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2128             }
2129             shader->CompileStatus = COMPILE_SKIPPED;
2130
2131             free((void *)shader->FallbackSource);
2132             shader->FallbackSource = NULL;
2133             return;
2134          }
2135       }
2136    } else {
2137       /* We should only ever end up here if a re-compile has been forced by a
2138        * shader cache miss. In which case we can skip the compile if its
2139        * already be done by a previous fallback or the initial compile call.
2140        */
2141       if (shader->CompileStatus == COMPILE_SUCCESS)
2142          return;
2143    }
2144
2145    struct _mesa_glsl_parse_state *state =
2146       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2147
2148    if (ctx->Const.GenerateTemporaryNames)
2149       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2150                               false, true);
2151
2152    state->error = glcpp_preprocess(state, &source, &state->info_log,
2153                                    add_builtin_defines, state, ctx);
2154
2155    if (!state->error) {
2156      _mesa_glsl_lexer_ctor(state, source);
2157      _mesa_glsl_parse(state);
2158      _mesa_glsl_lexer_dtor(state);
2159      do_late_parsing_checks(state);
2160    }
2161
2162    if (dump_ast) {
2163       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2164          ast->print();
2165       }
2166       printf("\n\n");
2167    }
2168
2169    ralloc_free(shader->ir);
2170    shader->ir = new(shader) exec_list;
2171    if (!state->error && !state->translation_unit.is_empty())
2172       _mesa_ast_to_hir(shader->ir, state);
2173
2174    if (!state->error) {
2175       validate_ir_tree(shader->ir);
2176
2177       /* Print out the unoptimized IR. */
2178       if (dump_hir) {
2179          _mesa_print_ir(stdout, shader->ir, state);
2180       }
2181    }
2182
2183    if (shader->InfoLog)
2184       ralloc_free(shader->InfoLog);
2185
2186    if (!state->error)
2187       set_shader_inout_layout(shader, state);
2188
2189    shader->symbols = new(shader->ir) glsl_symbol_table;
2190    shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2191    shader->InfoLog = state->info_log;
2192    shader->Version = state->language_version;
2193    shader->IsES = state->es_shader;
2194
2195    if (!state->error && !shader->ir->is_empty()) {
2196       assign_subroutine_indexes(state);
2197       lower_subroutine(shader->ir, state);
2198       opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2199    }
2200
2201    if (!force_recompile) {
2202       free((void *)shader->FallbackSource);
2203       shader->FallbackSource = NULL;
2204    }
2205
2206    delete state->symbols;
2207    ralloc_free(state);
2208
2209    if (ctx->Cache && shader->CompileStatus == COMPILE_SUCCESS) {
2210       char sha1_buf[41];
2211       disk_cache_put_key(ctx->Cache, shader->sha1);
2212       if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2213          _mesa_sha1_format(sha1_buf, shader->sha1);
2214          fprintf(stderr, "marking shader: %s\n", sha1_buf);
2215       }
2216    }
2217 }
2218
2219 } /* extern "C" */
2220 /**
2221  * Do the set of common optimizations passes
2222  *
2223  * \param ir                          List of instructions to be optimized
2224  * \param linked                      Is the shader linked?  This enables
2225  *                                    optimizations passes that remove code at
2226  *                                    global scope and could cause linking to
2227  *                                    fail.
2228  * \param uniform_locations_assigned  Have locations already been assigned for
2229  *                                    uniforms?  This prevents the declarations
2230  *                                    of unused uniforms from being removed.
2231  *                                    The setting of this flag only matters if
2232  *                                    \c linked is \c true.
2233  * \param options                     The driver's preferred shader options.
2234  * \param native_integers             Selects optimizations that depend on the
2235  *                                    implementations supporting integers
2236  *                                    natively (as opposed to supporting
2237  *                                    integers in floating point registers).
2238  */
2239 bool
2240 do_common_optimization(exec_list *ir, bool linked,
2241                        bool uniform_locations_assigned,
2242                        const struct gl_shader_compiler_options *options,
2243                        bool native_integers)
2244 {
2245    const bool debug = false;
2246    bool progress = false;
2247
2248 #define OPT(PASS, ...) do {                                             \
2249       if (debug) {                                                      \
2250          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2251          const bool opt_progress = PASS(__VA_ARGS__);                   \
2252          progress = opt_progress || progress;                           \
2253          if (opt_progress)                                              \
2254             _mesa_print_ir(stderr, ir, NULL);                           \
2255          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2256                  #PASS, opt_progress ? "made" : "no");                  \
2257       } else {                                                          \
2258          progress = PASS(__VA_ARGS__) || progress;                      \
2259       }                                                                 \
2260    } while (false)
2261
2262    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2263
2264    if (linked) {
2265       OPT(do_function_inlining, ir);
2266       OPT(do_dead_functions, ir);
2267       OPT(do_structure_splitting, ir);
2268    }
2269    propagate_invariance(ir);
2270    OPT(do_if_simplification, ir);
2271    OPT(opt_flatten_nested_if_blocks, ir);
2272    OPT(opt_conditional_discard, ir);
2273    OPT(do_copy_propagation_elements, ir);
2274
2275    if (options->OptimizeForAOS && !linked)
2276       OPT(opt_flip_matrices, ir);
2277
2278    if (linked && options->OptimizeForAOS) {
2279       OPT(do_vectorize, ir);
2280    }
2281
2282    if (linked)
2283       OPT(do_dead_code, ir, uniform_locations_assigned);
2284    else
2285       OPT(do_dead_code_unlinked, ir);
2286    OPT(do_dead_code_local, ir);
2287    OPT(do_tree_grafting, ir);
2288    OPT(do_constant_propagation, ir);
2289    if (linked)
2290       OPT(do_constant_variable, ir);
2291    else
2292       OPT(do_constant_variable_unlinked, ir);
2293    OPT(do_constant_folding, ir);
2294    OPT(do_minmax_prune, ir);
2295    OPT(do_rebalance_tree, ir);
2296    OPT(do_algebraic, ir, native_integers, options);
2297    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2298        options->EmitNoCont, options->EmitNoLoops);
2299    OPT(do_vec_index_to_swizzle, ir);
2300    OPT(lower_vector_insert, ir, false);
2301    OPT(optimize_swizzles, ir);
2302
2303    OPT(optimize_split_arrays, ir, linked);
2304    OPT(optimize_redundant_jumps, ir);
2305
2306    if (options->MaxUnrollIterations) {
2307       loop_state *ls = analyze_loop_variables(ir);
2308       if (ls->loop_found) {
2309          bool loop_progress = unroll_loops(ir, ls, options);
2310          while (loop_progress) {
2311             loop_progress = false;
2312             loop_progress |= do_constant_propagation(ir);
2313             loop_progress |= do_if_simplification(ir);
2314
2315             /* Some drivers only call do_common_optimization() once rather
2316              * than in a loop. So we must call do_lower_jumps() after
2317              * unrolling a loop because for drivers that use LLVM validation
2318              * will fail if a jump is not the last instruction in the block.
2319              * For example the following will fail LLVM validation:
2320              *
2321              *   (loop (
2322              *      ...
2323              *   break
2324              *   (assign  (x) (var_ref v124)  (expression int + (var_ref v124)
2325              *      (constant int (1)) ) )
2326              *   ))
2327              */
2328             loop_progress |= do_lower_jumps(ir, true, true,
2329                                             options->EmitNoMainReturn,
2330                                             options->EmitNoCont,
2331                                             options->EmitNoLoops);
2332          }
2333          progress |= loop_progress;
2334       }
2335       delete ls;
2336    }
2337
2338 #undef OPT
2339
2340    return progress;
2341 }