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