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()
  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.MaxFragmentInputComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents;
 122    this->Const.MaxGeometryTextureImageUnits = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits;
 123    this->Const.MaxGeometryOutputVertices = ctx->Const.MaxGeometryOutputVertices;
 124    this->Const.MaxGeometryTotalOutputComponents = ctx->Const.MaxGeometryTotalOutputComponents;
 125    this->Const.MaxGeometryUniformComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxUniformComponents;
 126
 127    this->Const.MaxVertexAtomicCounters = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicCounters;
 128    this->Const.MaxTessControlAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters;
 129    this->Const.MaxTessEvaluationAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicCounters;
 130    this->Const.MaxGeometryAtomicCounters = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicCounters;
 131    this->Const.MaxFragmentAtomicCounters = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
 132    this->Const.MaxComputeAtomicCounters = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicCounters;
 133    this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
 134    this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
 135    this->Const.MaxVertexAtomicCounterBuffers =
 136       ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicBuffers;
 137    this->Const.MaxTessControlAtomicCounterBuffers =
 138       ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers;
 139    this->Const.MaxTessEvaluationAtomicCounterBuffers =
 140       ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers;
 141    this->Const.MaxGeometryAtomicCounterBuffers =
 142       ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers;
 143    this->Const.MaxFragmentAtomicCounterBuffers =
 144       ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
 145    this->Const.MaxComputeAtomicCounterBuffers =
 146       ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers;
 147    this->Const.MaxCombinedAtomicCounterBuffers =
 148       ctx->Const.MaxCombinedAtomicBuffers;
 149    this->Const.MaxAtomicCounterBufferSize =
 150       ctx->Const.MaxAtomicBufferSize;
 151
 152    /* ARB_enhanced_layouts constants */
 153    this->Const.MaxTransformFeedbackBuffers = ctx->Const.MaxTransformFeedbackBuffers;
 154    this->Const.MaxTransformFeedbackInterleavedComponents = ctx->Const.MaxTransformFeedbackInterleavedComponents;
 155
 156    /* Compute shader constants */
 157    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupCount); i++)
 158       this->Const.MaxComputeWorkGroupCount[i] = ctx->Const.MaxComputeWorkGroupCount[i];
 159    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupSize); i++)
 160       this->Const.MaxComputeWorkGroupSize[i] = ctx->Const.MaxComputeWorkGroupSize[i];
 161
 162    this->Const.MaxComputeTextureImageUnits = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
 163    this->Const.MaxComputeUniformComponents = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxUniformComponents;
 164
 165    this->Const.MaxImageUnits = ctx->Const.MaxImageUnits;
 166    this->Const.MaxCombinedShaderOutputResources = ctx->Const.MaxCombinedShaderOutputResources;
 167    this->Const.MaxImageSamples = ctx->Const.MaxImageSamples;
 168    this->Const.MaxVertexImageUniforms = ctx->Const.Program[MESA_SHADER_VERTEX].MaxImageUniforms;
 169    this->Const.MaxTessControlImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms;
 170    this->Const.MaxTessEvaluationImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms;
 171    this->Const.MaxGeometryImageUniforms = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxImageUniforms;
 172    this->Const.MaxFragmentImageUniforms = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxImageUniforms;
 173    this->Const.MaxComputeImageUniforms = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
 174    this->Const.MaxCombinedImageUniforms = ctx->Const.MaxCombinedImageUniforms;
 175
 176    /* ARB_viewport_array */
 177    this->Const.MaxViewports = ctx->Const.MaxViewports;
 178
 179    /* tessellation shader constants */
 180    this->Const.MaxPatchVertices = ctx->Const.MaxPatchVertices;
 181    this->Const.MaxTessGenLevel = ctx->Const.MaxTessGenLevel;
 182    this->Const.MaxTessControlInputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents;
 183    this->Const.MaxTessControlOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents;
 184    this->Const.MaxTessControlTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits;
 185    this->Const.MaxTessEvaluationInputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents;
 186    this->Const.MaxTessEvaluationOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents;
 187    this->Const.MaxTessEvaluationTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits;
 188    this->Const.MaxTessPatchComponents = ctx->Const.MaxTessPatchComponents;
 189    this->Const.MaxTessControlTotalOutputComponents = ctx->Const.MaxTessControlTotalOutputComponents;
 190    this->Const.MaxTessControlUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents;
 191    this->Const.MaxTessEvaluationUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents;
 192
 193    /* GL 4.5 / OES_sample_variables */
 194    this->Const.MaxSamples = ctx->Const.MaxSamples;
 195
 196    this->current_function = NULL;
 197    this->toplevel_ir = NULL;
 198    this->found_return = false;
 199    this->all_invariant = false;
 200    this->user_structures = NULL;
 201    this->num_user_structures = 0;
 202    this->num_subroutines = 0;
 203    this->subroutines = NULL;
 204    this->num_subroutine_types = 0;
 205    this->subroutine_types = NULL;
 206
 207    /* supported_versions should be large enough to support the known desktop
 208     * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
 209     */
 210    STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 4) ==
 211                  ARRAY_SIZE(this->supported_versions));
 212
 213    /* Populate the list of supported GLSL versions */
 214    /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
 215     * the OpenGL 3.2 Core context is supported, this logic will need
 216     * change.  Older versions of GLSL are no longer supported
 217     * outside the compatibility contexts of 3.x.
 218     */
 219    this->num_supported_versions = 0;
 220    if (_mesa_is_desktop_gl(ctx)) {
 221       for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
 222          if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
 223             this->supported_versions[this->num_supported_versions].ver
 224                = known_desktop_glsl_versions[i];
 225             this->supported_versions[this->num_supported_versions].gl_ver
 226                = known_desktop_gl_versions[i];
 227             this->supported_versions[this->num_supported_versions].es = false;
 228             this->num_supported_versions++;
 229          }
 230       }
 231    }
 232    if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
 233       this->supported_versions[this->num_supported_versions].ver = 100;
 234       this->supported_versions[this->num_supported_versions].gl_ver = 20;
 235       this->supported_versions[this->num_supported_versions].es = true;
 236       this->num_supported_versions++;
 237    }
 238    if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
 239       this->supported_versions[this->num_supported_versions].ver = 300;
 240       this->supported_versions[this->num_supported_versions].gl_ver = 30;
 241       this->supported_versions[this->num_supported_versions].es = true;
 242       this->num_supported_versions++;
 243    }
 244    if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
 245       this->supported_versions[this->num_supported_versions].ver = 310;
 246       this->supported_versions[this->num_supported_versions].gl_ver = 31;
 247       this->supported_versions[this->num_supported_versions].es = true;
 248       this->num_supported_versions++;
 249    }
 250    if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
 251        ctx->Extensions.ARB_ES3_2_compatibility) {
 252       this->supported_versions[this->num_supported_versions].ver = 320;
 253       this->supported_versions[this->num_supported_versions].gl_ver = 32;
 254       this->supported_versions[this->num_supported_versions].es = true;
 255       this->num_supported_versions++;
 256    }
 257
 258    /* Create a string for use in error messages to tell the user which GLSL
 259     * versions are supported.
 260     */
 261    char *supported = ralloc_strdup(this, "");
 262    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 263       unsigned ver = this->supported_versions[i].ver;
 264       const char *const prefix = (i == 0)
 265          ? ""
 266          : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
 267       const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
 268
 269       ralloc_asprintf_append(& supported, "%s%u.%02u%s",
 270                              prefix,
 271                              ver / 100, ver % 100,
 272                              suffix);
 273    }
 274
 275    this->supported_version_string = supported;
 276
 277    if (ctx->Const.ForceGLSLExtensionsWarn)
 278       _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
 279
 280    this->default_uniform_qualifier = new(this) ast_type_qualifier();
 281    this->default_uniform_qualifier->flags.q.shared = 1;
 282    this->default_uniform_qualifier->flags.q.column_major = 1;
 283
 284    this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
 285    this->default_shader_storage_qualifier->flags.q.shared = 1;
 286    this->default_shader_storage_qualifier->flags.q.column_major = 1;
 287
 288    this->fs_uses_gl_fragcoord = false;
 289    this->fs_redeclares_gl_fragcoord = false;
 290    this->fs_origin_upper_left = false;
 291    this->fs_pixel_center_integer = false;
 292    this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
 293
 294    this->gs_input_prim_type_specified = false;
 295    this->tcs_output_vertices_specified = false;
 296    this->gs_input_size = 0;
 297    this->in_qualifier = new(this) ast_type_qualifier();
 298    this->out_qualifier = new(this) ast_type_qualifier();
 299    this->fs_early_fragment_tests = false;
 300    this->fs_inner_coverage = false;
 301    this->fs_post_depth_coverage = false;
 302    this->fs_blend_support = 0;
 303    memset(this->atomic_counter_offsets, 0,
 304           sizeof(this->atomic_counter_offsets));
 305    this->allow_extension_directive_midshader =
 306       ctx->Const.AllowGLSLExtensionDirectiveMidShader;
 307    this->allow_builtin_variable_redeclaration =
 308       ctx->Const.AllowGLSLBuiltinVariableRedeclaration;
 309
 310    this->cs_input_local_size_variable_specified = false;
 311
 312    /* ARB_bindless_texture */
 313    this->bindless_sampler_specified = false;
 314    this->bindless_image_specified = false;
 315    this->bound_sampler_specified = false;
 316    this->bound_image_specified = false;
 317 }
 318
 319 /**
 320  * Determine whether the current GLSL version is sufficiently high to support
 321  * a certain feature, and generate an error message if it isn't.
 322  *
 323  * \param required_glsl_version and \c required_glsl_es_version are
 324  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 325  *
 326  * \param locp is the parser location where the error should be reported.
 327  *
 328  * \param fmt (and additional arguments) constitute a printf-style error
 329  * message to report if the version check fails.  Information about the
 330  * current and required GLSL versions will be appended.  So, for example, if
 331  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 332  * "foo unsupported") is called, the error message will be "foo unsupported in
 333  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 334  */
 335 bool
 336 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 337                                       unsigned required_glsl_es_version,
 338                                       YYLTYPE *locp, const char *fmt, ...)
 339 {
 340    if (this->is_version(required_glsl_version, required_glsl_es_version))
 341       return true;
 342
 343    va_list args;
 344    va_start(args, fmt);
 345    char *problem = ralloc_vasprintf(this, fmt, args);
 346    va_end(args);
 347    const char *glsl_version_string
 348       = glsl_compute_version_string(this, false, required_glsl_version);
 349    const char *glsl_es_version_string
 350       = glsl_compute_version_string(this, true, required_glsl_es_version);
 351    const char *requirement_string = "";
 352    if (required_glsl_version && required_glsl_es_version) {
 353       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 354                                            glsl_version_string,
 355                                            glsl_es_version_string);
 356    } else if (required_glsl_version) {
 357       requirement_string = ralloc_asprintf(this, " (%s required)",
 358                                            glsl_version_string);
 359    } else if (required_glsl_es_version) {
 360       requirement_string = ralloc_asprintf(this, " (%s required)",
 361                                            glsl_es_version_string);
 362    }
 363    _mesa_glsl_error(locp, this, "%s in %s%s",
 364                     problem, this->get_version_string(),
 365                     requirement_string);
 366
 367    return false;
 368 }
 369
 370 /**
 371  * Process a GLSL #version directive.
 372  *
 373  * \param version is the integer that follows the #version token.
 374  *
 375  * \param ident is a string identifier that follows the integer, if any is
 376  * present.  Otherwise NULL.
 377  */
 378 void
 379 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 380                                                   const char *ident)
 381 {
 382    bool es_token_present = false;
 383    bool compat_token_present = false;
 384    if (ident) {
 385       if (strcmp(ident, "es") == 0) {
 386          es_token_present = true;
 387       } else if (version >= 150) {
 388          if (strcmp(ident, "core") == 0) {
 389             /* Accept the token.  There's no need to record that this is
 390              * a core profile shader since that's the only profile we support.
 391              */
 392          } else if (strcmp(ident, "compatibility") == 0) {
 393             compat_token_present = true;
 394
 395             if (this->ctx->API != API_OPENGL_COMPAT) {
 396                _mesa_glsl_error(locp, this,
 397                                 "the compatibility profile is not supported");
 398             }
 399          } else {
 400             _mesa_glsl_error(locp, this,
 401                              "\"%s\" is not a valid shading language profile; "
 402                              "if present, it must be \"core\"", ident);
 403          }
 404       } else {
 405          _mesa_glsl_error(locp, this,
 406                           "illegal text following version number");
 407       }
 408    }
 409
 410    this->es_shader = es_token_present;
 411    if (version == 100) {
 412       if (es_token_present) {
 413          _mesa_glsl_error(locp, this,
 414                           "GLSL 1.00 ES should be selected using "
 415                           "`#version 100'");
 416       } else {
 417          this->es_shader = true;
 418       }
 419    }
 420
 421    if (this->es_shader) {
 422       this->ARB_texture_rectangle_enable = false;
 423    }
 424
 425    if (this->forced_language_version)
 426       this->language_version = this->forced_language_version;
 427    else
 428       this->language_version = version;
 429
 430    this->compat_shader = compat_token_present ||
 431                          (this->ctx->API == API_OPENGL_COMPAT &&
 432                           this->language_version == 140) ||
 433                          (!this->es_shader && this->language_version < 140);
 434
 435    bool supported = false;
 436    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 437       if (this->supported_versions[i].ver == this->language_version
 438           && this->supported_versions[i].es == this->es_shader) {
 439          this->gl_version = this->supported_versions[i].gl_ver;
 440          supported = true;
 441          break;
 442       }
 443    }
 444
 445    if (!supported) {
 446       _mesa_glsl_error(locp, this, "%s is not supported. "
 447                        "Supported versions are: %s",
 448                        this->get_version_string(),
 449                        this->supported_version_string);
 450
 451       /* On exit, the language_version must be set to a valid value.
 452        * Later calls to _mesa_glsl_initialize_types will misbehave if
 453        * the version is invalid.
 454        */
 455       switch (this->ctx->API) {
 456       case API_OPENGL_COMPAT:
 457       case API_OPENGL_CORE:
 458          this->language_version = this->ctx->Const.GLSLVersion;
 459          break;
 460
 461       case API_OPENGLES:
 462          assert(!"Should not get here.");
 463          /* FALLTHROUGH */
 464
 465       case API_OPENGLES2:
 466          this->language_version = 100;
 467          break;
 468       }
 469    }
 470 }
 471
 472
 473 /* This helper function will append the given message to the shader's
 474    info log and report it via GL_ARB_debug_output. Per that extension,
 475    'type' is one of the enum values classifying the message, and
 476    'id' is the implementation-defined ID of the given message. */
 477 static void
 478 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 479                GLenum type, const char *fmt, va_list ap)
 480 {
 481    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 482    GLuint msg_id = 0;
 483
 484    assert(state->info_log != NULL);
 485
 486    /* Get the offset that the new message will be written to. */
 487    int msg_offset = strlen(state->info_log);
 488
 489    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 490                                             locp->source,
 491                                             locp->first_line,
 492                                             locp->first_column,
 493                                             error ? "error" : "warning");
 494    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 495
 496    const char *const msg = &state->info_log[msg_offset];
 497    struct gl_context *ctx = state->ctx;
 498
 499    /* Report the error via GL_ARB_debug_output. */
 500    _mesa_shader_debug(ctx, type, &msg_id, msg);
 501
 502    ralloc_strcat(&state->info_log, "\n");
 503 }
 504
 505 void
 506 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 507                  const char *fmt, ...)
 508 {
 509    va_list ap;
 510
 511    state->error = true;
 512
 513    va_start(ap, fmt);
 514    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 515    va_end(ap);
 516 }
 517
 518
 519 void
 520 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 521                    const char *fmt, ...)
 522 {
 523    va_list ap;
 524
 525    va_start(ap, fmt);
 526    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 527    va_end(ap);
 528 }
 529
 530
 531 /**
 532  * Enum representing the possible behaviors that can be specified in
 533  * an #extension directive.
 534  */
 535 enum ext_behavior {
 536    extension_disable,
 537    extension_enable,
 538    extension_require,
 539    extension_warn
 540 };
 541
 542 /**
 543  * Element type for _mesa_glsl_supported_extensions
 544  */
 545 struct _mesa_glsl_extension {
 546    /**
 547     * Name of the extension when referred to in a GLSL extension
 548     * statement
 549     */
 550    const char *name;
 551
 552    /**
 553     * Whether this extension is a part of AEP
 554     */
 555    bool aep;
 556
 557    /**
 558     * Predicate that checks whether the relevant extension is available for
 559     * this context.
 560     */
 561    bool (*available_pred)(const struct gl_context *,
 562                           gl_api api, uint8_t version);
 563
 564    /**
 565     * Flag in the _mesa_glsl_parse_state struct that should be set
 566     * when this extension is enabled.
 567     *
 568     * See note in _mesa_glsl_extension::supported_flag about "pointer
 569     * to member" types.
 570     */
 571    bool _mesa_glsl_parse_state::* enable_flag;
 572
 573    /**
 574     * Flag in the _mesa_glsl_parse_state struct that should be set
 575     * when the shader requests "warn" behavior for this extension.
 576     *
 577     * See note in _mesa_glsl_extension::supported_flag about "pointer
 578     * to member" types.
 579     */
 580    bool _mesa_glsl_parse_state::* warn_flag;
 581
 582
 583    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 584                               gl_api api, uint8_t gl_version) const;
 585    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 586 };
 587
 588 /** Checks if the context supports a user-facing extension */
 589 #define EXT(name_str, driver_cap, ...) \
 590 static MAYBE_UNUSED bool \
 591 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 592 { \
 593    return ctx->Extensions.driver_cap && (version >= \
 594           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 595 }
 596 #include "main/extensions_table.h"
 597 #undef EXT
 598
 599 #define EXT(NAME)                                           \
 600    { "GL_" #NAME, false, has_##NAME,                        \
 601      &_mesa_glsl_parse_state::NAME##_enable,                \
 602      &_mesa_glsl_parse_state::NAME##_warn }
 603
 604 #define EXT_AEP(NAME)                                       \
 605    { "GL_" #NAME, true, has_##NAME,                         \
 606      &_mesa_glsl_parse_state::NAME##_enable,                \
 607      &_mesa_glsl_parse_state::NAME##_warn }
 608
 609 /**
 610  * Table of extensions that can be enabled/disabled within a shader,
 611  * and the conditions under which they are supported.
 612  */
 613 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 614    /* ARB extensions go here, sorted alphabetically.
 615     */
 616    EXT(ARB_ES3_1_compatibility),
 617    EXT(ARB_ES3_2_compatibility),
 618    EXT(ARB_arrays_of_arrays),
 619    EXT(ARB_bindless_texture),
 620    EXT(ARB_compatibility),
 621    EXT(ARB_compute_shader),
 622    EXT(ARB_compute_variable_group_size),
 623    EXT(ARB_conservative_depth),
 624    EXT(ARB_cull_distance),
 625    EXT(ARB_derivative_control),
 626    EXT(ARB_draw_buffers),
 627    EXT(ARB_draw_instanced),
 628    EXT(ARB_enhanced_layouts),
 629    EXT(ARB_explicit_attrib_location),
 630    EXT(ARB_explicit_uniform_location),
 631    EXT(ARB_fragment_coord_conventions),
 632    EXT(ARB_fragment_layer_viewport),
 633    EXT(ARB_gpu_shader5),
 634    EXT(ARB_gpu_shader_fp64),
 635    EXT(ARB_gpu_shader_int64),
 636    EXT(ARB_post_depth_coverage),
 637    EXT(ARB_sample_shading),
 638    EXT(ARB_separate_shader_objects),
 639    EXT(ARB_shader_atomic_counter_ops),
 640    EXT(ARB_shader_atomic_counters),
 641    EXT(ARB_shader_ballot),
 642    EXT(ARB_shader_bit_encoding),
 643    EXT(ARB_shader_clock),
 644    EXT(ARB_shader_draw_parameters),
 645    EXT(ARB_shader_group_vote),
 646    EXT(ARB_shader_image_load_store),
 647    EXT(ARB_shader_image_size),
 648    EXT(ARB_shader_precision),
 649    EXT(ARB_shader_stencil_export),
 650    EXT(ARB_shader_storage_buffer_object),
 651    EXT(ARB_shader_subroutine),
 652    EXT(ARB_shader_texture_image_samples),
 653    EXT(ARB_shader_texture_lod),
 654    EXT(ARB_shader_viewport_layer_array),
 655    EXT(ARB_shading_language_420pack),
 656    EXT(ARB_shading_language_packing),
 657    EXT(ARB_tessellation_shader),
 658    EXT(ARB_texture_cube_map_array),
 659    EXT(ARB_texture_gather),
 660    EXT(ARB_texture_multisample),
 661    EXT(ARB_texture_query_levels),
 662    EXT(ARB_texture_query_lod),
 663    EXT(ARB_texture_rectangle),
 664    EXT(ARB_uniform_buffer_object),
 665    EXT(ARB_vertex_attrib_64bit),
 666    EXT(ARB_viewport_array),
 667
 668    /* KHR extensions go here, sorted alphabetically.
 669     */
 670    EXT_AEP(KHR_blend_equation_advanced),
 671
 672    /* OES extensions go here, sorted alphabetically.
 673     */
 674    EXT(OES_EGL_image_external),
 675    EXT(OES_EGL_image_external_essl3),
 676    EXT(OES_geometry_point_size),
 677    EXT(OES_geometry_shader),
 678    EXT(OES_gpu_shader5),
 679    EXT(OES_primitive_bounding_box),
 680    EXT_AEP(OES_sample_variables),
 681    EXT_AEP(OES_shader_image_atomic),
 682    EXT(OES_shader_io_blocks),
 683    EXT_AEP(OES_shader_multisample_interpolation),
 684    EXT(OES_standard_derivatives),
 685    EXT(OES_tessellation_point_size),
 686    EXT(OES_tessellation_shader),
 687    EXT(OES_texture_3D),
 688    EXT(OES_texture_buffer),
 689    EXT(OES_texture_cube_map_array),
 690    EXT_AEP(OES_texture_storage_multisample_2d_array),
 691    EXT(OES_viewport_array),
 692
 693    /* All other extensions go here, sorted alphabetically.
 694     */
 695    EXT(AMD_conservative_depth),
 696    EXT(AMD_shader_stencil_export),
 697    EXT(AMD_shader_trinary_minmax),
 698    EXT(AMD_vertex_shader_layer),
 699    EXT(AMD_vertex_shader_viewport_index),
 700    EXT(ANDROID_extension_pack_es31a),
 701    EXT(EXT_blend_func_extended),
 702    EXT(EXT_frag_depth),
 703    EXT(EXT_draw_buffers),
 704    EXT(EXT_clip_cull_distance),
 705    EXT(EXT_geometry_point_size),
 706    EXT_AEP(EXT_geometry_shader),
 707    EXT_AEP(EXT_gpu_shader5),
 708    EXT_AEP(EXT_primitive_bounding_box),
 709    EXT(EXT_separate_shader_objects),
 710    EXT(EXT_shader_framebuffer_fetch),
 711    EXT(EXT_shader_framebuffer_fetch_non_coherent),
 712    EXT(EXT_shader_integer_mix),
 713    EXT_AEP(EXT_shader_io_blocks),
 714    EXT(EXT_shader_samples_identical),
 715    EXT(EXT_tessellation_point_size),
 716    EXT_AEP(EXT_tessellation_shader),
 717    EXT(EXT_texture_array),
 718    EXT_AEP(EXT_texture_buffer),
 719    EXT_AEP(EXT_texture_cube_map_array),
 720    EXT(INTEL_conservative_rasterization),
 721    EXT(MESA_shader_integer_functions),
 722    EXT(NV_image_formats),
 723 };
 724
 725 #undef EXT
 726
 727
 728 /**
 729  * Determine whether a given extension is compatible with the target,
 730  * API, and extension information in the current parser state.
 731  */
 732 bool _mesa_glsl_extension::compatible_with_state(
 733       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 734 {
 735    return this->available_pred(state->ctx, api, gl_version);
 736 }
 737
 738 /**
 739  * Set the appropriate flags in the parser state to establish the
 740  * given behavior for this extension.
 741  */
 742 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 743                                      ext_behavior behavior) const
 744 {
 745    /* Note: the ->* operator indexes into state by the
 746     * offsets this->enable_flag and this->warn_flag.  See
 747     * _mesa_glsl_extension::supported_flag for more info.
 748     */
 749    state->*(this->enable_flag) = (behavior != extension_disable);
 750    state->*(this->warn_flag)   = (behavior == extension_warn);
 751 }
 752
 753 /**
 754  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 755  * the name is not found, return NULL.
 756  */
 757 static const _mesa_glsl_extension *find_extension(const char *name)
 758 {
 759    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 760       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 761          return &_mesa_glsl_supported_extensions[i];
 762       }
 763    }
 764    return NULL;
 765 }
 766
 767 bool
 768 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 769                              const char *behavior_string, YYLTYPE *behavior_locp,
 770                              _mesa_glsl_parse_state *state)
 771 {
 772    uint8_t gl_version = state->ctx->Extensions.Version;
 773    gl_api api = state->ctx->API;
 774    ext_behavior behavior;
 775    if (strcmp(behavior_string, "warn") == 0) {
 776       behavior = extension_warn;
 777    } else if (strcmp(behavior_string, "require") == 0) {
 778       behavior = extension_require;
 779    } else if (strcmp(behavior_string, "enable") == 0) {
 780       behavior = extension_enable;
 781    } else if (strcmp(behavior_string, "disable") == 0) {
 782       behavior = extension_disable;
 783    } else {
 784       _mesa_glsl_error(behavior_locp, state,
 785                        "unknown extension behavior `%s'",
 786                        behavior_string);
 787       return false;
 788    }
 789
 790    /* If we're in a desktop context but with an ES shader, use an ES API enum
 791     * to verify extension availability.
 792     */
 793    if (state->es_shader && api != API_OPENGLES2)
 794       api = API_OPENGLES2;
 795    /* Use the language-version derived GL version to extension checks, unless
 796     * we're using meta, which sets the version to the max.
 797     */
 798    if (gl_version != 0xff)
 799       gl_version = state->gl_version;
 800
 801    if (strcmp(name, "all") == 0) {
 802       if ((behavior == extension_enable) || (behavior == extension_require)) {
 803          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 804                           (behavior == extension_enable)
 805                           ? "enable" : "require");
 806          return false;
 807       } else {
 808          for (unsigned i = 0;
 809               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 810             const _mesa_glsl_extension *extension
 811                = &_mesa_glsl_supported_extensions[i];
 812             if (extension->compatible_with_state(state, api, gl_version)) {
 813                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 814             }
 815          }
 816       }
 817    } else {
 818       const _mesa_glsl_extension *extension = find_extension(name);
 819       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 820          extension->set_flags(state, behavior);
 821          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 822             for (unsigned i = 0;
 823                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 824                const _mesa_glsl_extension *extension =
 825                   &_mesa_glsl_supported_extensions[i];
 826
 827                if (!extension->aep)
 828                   continue;
 829                /* AEP should not be enabled if all of the sub-extensions can't
 830                 * also be enabled. This is not the proper layer to do such
 831                 * error-checking though.
 832                 */
 833                assert(extension->compatible_with_state(state, api, gl_version));
 834                extension->set_flags(state, behavior);
 835             }
 836          }
 837       } else {
 838          static const char fmt[] = "extension `%s' unsupported in %s shader";
 839
 840          if (behavior == extension_require) {
 841             _mesa_glsl_error(name_locp, state, fmt,
 842                              name, _mesa_shader_stage_to_string(state->stage));
 843             return false;
 844          } else {
 845             _mesa_glsl_warning(name_locp, state, fmt,
 846                                name, _mesa_shader_stage_to_string(state->stage));
 847          }
 848       }
 849    }
 850
 851    return true;
 852 }
 853
 854
 855 /**
 856  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 857  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 858  * (process_array_constructor, et al) sufficient information to do type
 859  * checking.
 860  *
 861  * Operates on assignments involving an aggregate initializer. E.g.,
 862  *
 863  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 864  *
 865  * or more ridiculously,
 866  *
 867  * struct S {
 868  *     vec4 v[2];
 869  * };
 870  *
 871  * struct {
 872  *     S a[2], b;
 873  *     int c;
 874  * } aggregate = {
 875  *     {
 876  *         {
 877  *             {
 878  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 879  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 880  *             } // a[0].v
 881  *         }, // a[0]
 882  *         {
 883  *             {
 884  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 885  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 886  *             } // a[1].v
 887  *         } // a[1]
 888  *     }, // a
 889  *     {
 890  *         {
 891  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 892  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 893  *         } // b.v
 894  *     }, // b
 895  *     4 // c
 896  * };
 897  *
 898  * This pass is necessary because the right-hand side of <type> e = { ... }
 899  * doesn't contain sufficient information to determine if the types match.
 900  */
 901 void
 902 _mesa_ast_set_aggregate_type(const glsl_type *type,
 903                              ast_expression *expr)
 904 {
 905    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 906    ai->constructor_type = type;
 907
 908    /* If the aggregate is an array, recursively set its elements' types. */
 909    if (type->is_array()) {
 910       /* Each array element has the type type->fields.array.
 911        *
 912        * E.g., if <type> if struct S[2] we want to set each element's type to
 913        * struct S.
 914        */
 915       for (exec_node *expr_node = ai->expressions.get_head_raw();
 916            !expr_node->is_tail_sentinel();
 917            expr_node = expr_node->next) {
 918          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 919                                                link);
 920
 921          if (expr->oper == ast_aggregate)
 922             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 923       }
 924
 925    /* If the aggregate is a struct, recursively set its fields' types. */
 926    } else if (type->is_record()) {
 927       exec_node *expr_node = ai->expressions.get_head_raw();
 928
 929       /* Iterate through the struct's fields. */
 930       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 931            i++, expr_node = expr_node->next) {
 932          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 933                                                link);
 934
 935          if (expr->oper == ast_aggregate) {
 936             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 937          }
 938       }
 939    /* If the aggregate is a matrix, set its columns' types. */
 940    } else if (type->is_matrix()) {
 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->column_type(), expr);
 949       }
 950    }
 951 }
 952
 953 void
 954 _mesa_ast_process_interface_block(YYLTYPE *locp,
 955                                   _mesa_glsl_parse_state *state,
 956                                   ast_interface_block *const block,
 957                                   const struct ast_type_qualifier &q)
 958 {
 959    if (q.flags.q.buffer) {
 960       if (!state->has_shader_storage_buffer_objects()) {
 961          _mesa_glsl_error(locp, state,
 962                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 963                           "required for defining shader storage blocks");
 964       } else if (state->ARB_shader_storage_buffer_object_warn) {
 965          _mesa_glsl_warning(locp, state,
 966                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 967                             "required for defining shader storage blocks");
 968       }
 969    } else if (q.flags.q.uniform) {
 970       if (!state->has_uniform_buffer_objects()) {
 971          _mesa_glsl_error(locp, state,
 972                           "#version 140 / GL_ARB_uniform_buffer_object "
 973                           "required for defining uniform blocks");
 974       } else if (state->ARB_uniform_buffer_object_warn) {
 975          _mesa_glsl_warning(locp, state,
 976                             "#version 140 / GL_ARB_uniform_buffer_object "
 977                             "required for defining uniform blocks");
 978       }
 979    } else {
 980       if (!state->has_shader_io_blocks()) {
 981          if (state->es_shader) {
 982             _mesa_glsl_error(locp, state,
 983                              "GL_OES_shader_io_blocks or #version 320 "
 984                              "required for using interface blocks");
 985          } else {
 986             _mesa_glsl_error(locp, state,
 987                              "#version 150 required for using "
 988                              "interface blocks");
 989          }
 990       }
 991    }
 992
 993    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
 994     * "It is illegal to have an input block in a vertex shader
 995     *  or an output block in a fragment shader"
 996     */
 997    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
 998       _mesa_glsl_error(locp, state,
 999                        "`in' interface block is not allowed for "
1000                        "a vertex shader");
1001    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1002       _mesa_glsl_error(locp, state,
1003                        "`out' interface block is not allowed for "
1004                        "a fragment shader");
1005    }
1006
1007    /* Since block arrays require names, and both features are added in
1008     * the same language versions, we don't have to explicitly
1009     * version-check both things.
1010     */
1011    if (block->instance_name != NULL) {
1012       state->check_version(150, 300, locp, "interface blocks with "
1013                            "an instance name are not allowed");
1014    }
1015
1016    ast_type_qualifier::bitset_t interface_type_mask;
1017    struct ast_type_qualifier temp_type_qualifier;
1018
1019    /* Get a bitmask containing only the in/out/uniform/buffer
1020     * flags, allowing us to ignore other irrelevant flags like
1021     * interpolation qualifiers.
1022     */
1023    temp_type_qualifier.flags.i = 0;
1024    temp_type_qualifier.flags.q.uniform = true;
1025    temp_type_qualifier.flags.q.in = true;
1026    temp_type_qualifier.flags.q.out = true;
1027    temp_type_qualifier.flags.q.buffer = true;
1028    temp_type_qualifier.flags.q.patch = true;
1029    interface_type_mask = temp_type_qualifier.flags.i;
1030
1031    /* Get the block's interface qualifier.  The interface_qualifier
1032     * production rule guarantees that only one bit will be set (and
1033     * it will be in/out/uniform).
1034     */
1035    ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1036
1037    block->default_layout.flags.i |= block_interface_qualifier;
1038
1039    if (state->stage == MESA_SHADER_GEOMETRY &&
1040        state->has_explicit_attrib_stream() &&
1041        block->default_layout.flags.q.out) {
1042       /* Assign global layout's stream value. */
1043       block->default_layout.flags.q.stream = 1;
1044       block->default_layout.flags.q.explicit_stream = 0;
1045       block->default_layout.stream = state->out_qualifier->stream;
1046    }
1047
1048    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1049       /* Assign global layout's xfb_buffer value. */
1050       block->default_layout.flags.q.xfb_buffer = 1;
1051       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1052       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1053    }
1054
1055    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1056       ast_type_qualifier& qualifier = member->type->qualifier;
1057       if ((qualifier.flags.i & interface_type_mask) == 0) {
1058          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1059           * "If no optional qualifier is used in a member declaration, the
1060           *  qualifier of the variable is just in, out, or uniform as declared
1061           *  by interface-qualifier."
1062           */
1063          qualifier.flags.i |= block_interface_qualifier;
1064       } else if ((qualifier.flags.i & interface_type_mask) !=
1065                  block_interface_qualifier) {
1066          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1067           * "If optional qualifiers are used, they can include interpolation
1068           *  and storage qualifiers and they must declare an input, output,
1069           *  or uniform variable consistent with the interface qualifier of
1070           *  the block."
1071           */
1072          _mesa_glsl_error(locp, state,
1073                           "uniform/in/out qualifier on "
1074                           "interface block member does not match "
1075                           "the interface block");
1076       }
1077
1078       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1079          _mesa_glsl_error(locp, state,
1080                           "invariant qualifiers can be used only "
1081                           "in interface block members for shader "
1082                           "inputs or outputs");
1083    }
1084 }
1085
1086 static void
1087 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1088 {
1089    if (q->is_subroutine_decl())
1090       printf("subroutine ");
1091
1092    if (q->subroutine_list) {
1093       printf("subroutine (");
1094       q->subroutine_list->print();
1095       printf(")");
1096    }
1097
1098    if (q->flags.q.constant)
1099       printf("const ");
1100
1101    if (q->flags.q.invariant)
1102       printf("invariant ");
1103
1104    if (q->flags.q.attribute)
1105       printf("attribute ");
1106
1107    if (q->flags.q.varying)
1108       printf("varying ");
1109
1110    if (q->flags.q.in && q->flags.q.out)
1111       printf("inout ");
1112    else {
1113       if (q->flags.q.in)
1114          printf("in ");
1115
1116       if (q->flags.q.out)
1117          printf("out ");
1118    }
1119
1120    if (q->flags.q.centroid)
1121       printf("centroid ");
1122    if (q->flags.q.sample)
1123       printf("sample ");
1124    if (q->flags.q.patch)
1125       printf("patch ");
1126    if (q->flags.q.uniform)
1127       printf("uniform ");
1128    if (q->flags.q.buffer)
1129       printf("buffer ");
1130    if (q->flags.q.smooth)
1131       printf("smooth ");
1132    if (q->flags.q.flat)
1133       printf("flat ");
1134    if (q->flags.q.noperspective)
1135       printf("noperspective ");
1136 }
1137
1138
1139 void
1140 ast_node::print(void) const
1141 {
1142    printf("unhandled node ");
1143 }
1144
1145
1146 ast_node::ast_node(void)
1147 {
1148    this->location.source = 0;
1149    this->location.first_line = 0;
1150    this->location.first_column = 0;
1151    this->location.last_line = 0;
1152    this->location.last_column = 0;
1153 }
1154
1155
1156 static void
1157 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1158 {
1159    if (array_specifier)
1160       array_specifier->print();
1161 }
1162
1163
1164 void
1165 ast_compound_statement::print(void) const
1166 {
1167    printf("{\n");
1168
1169    foreach_list_typed(ast_node, ast, link, &this->statements) {
1170       ast->print();
1171    }
1172
1173    printf("}\n");
1174 }
1175
1176
1177 ast_compound_statement::ast_compound_statement(int new_scope,
1178                                                ast_node *statements)
1179 {
1180    this->new_scope = new_scope;
1181
1182    if (statements != NULL) {
1183       this->statements.push_degenerate_list_at_head(&statements->link);
1184    }
1185 }
1186
1187
1188 void
1189 ast_expression::print(void) const
1190 {
1191    switch (oper) {
1192    case ast_assign:
1193    case ast_mul_assign:
1194    case ast_div_assign:
1195    case ast_mod_assign:
1196    case ast_add_assign:
1197    case ast_sub_assign:
1198    case ast_ls_assign:
1199    case ast_rs_assign:
1200    case ast_and_assign:
1201    case ast_xor_assign:
1202    case ast_or_assign:
1203       subexpressions[0]->print();
1204       printf("%s ", operator_string(oper));
1205       subexpressions[1]->print();
1206       break;
1207
1208    case ast_field_selection:
1209       subexpressions[0]->print();
1210       printf(". %s ", primary_expression.identifier);
1211       break;
1212
1213    case ast_plus:
1214    case ast_neg:
1215    case ast_bit_not:
1216    case ast_logic_not:
1217    case ast_pre_inc:
1218    case ast_pre_dec:
1219       printf("%s ", operator_string(oper));
1220       subexpressions[0]->print();
1221       break;
1222
1223    case ast_post_inc:
1224    case ast_post_dec:
1225       subexpressions[0]->print();
1226       printf("%s ", operator_string(oper));
1227       break;
1228
1229    case ast_conditional:
1230       subexpressions[0]->print();
1231       printf("? ");
1232       subexpressions[1]->print();
1233       printf(": ");
1234       subexpressions[2]->print();
1235       break;
1236
1237    case ast_array_index:
1238       subexpressions[0]->print();
1239       printf("[ ");
1240       subexpressions[1]->print();
1241       printf("] ");
1242       break;
1243
1244    case ast_function_call: {
1245       subexpressions[0]->print();
1246       printf("( ");
1247
1248       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1249          if (&ast->link != this->expressions.get_head())
1250             printf(", ");
1251
1252          ast->print();
1253       }
1254
1255       printf(") ");
1256       break;
1257    }
1258
1259    case ast_identifier:
1260       printf("%s ", primary_expression.identifier);
1261       break;
1262
1263    case ast_int_constant:
1264       printf("%d ", primary_expression.int_constant);
1265       break;
1266
1267    case ast_uint_constant:
1268       printf("%u ", primary_expression.uint_constant);
1269       break;
1270
1271    case ast_float_constant:
1272       printf("%f ", primary_expression.float_constant);
1273       break;
1274
1275    case ast_double_constant:
1276       printf("%f ", primary_expression.double_constant);
1277       break;
1278
1279    case ast_int64_constant:
1280       printf("%" PRId64 " ", primary_expression.int64_constant);
1281       break;
1282
1283    case ast_uint64_constant:
1284       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1285       break;
1286
1287    case ast_bool_constant:
1288       printf("%s ",
1289              primary_expression.bool_constant
1290              ? "true" : "false");
1291       break;
1292
1293    case ast_sequence: {
1294       printf("( ");
1295       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1296          if (&ast->link != this->expressions.get_head())
1297             printf(", ");
1298
1299          ast->print();
1300       }
1301       printf(") ");
1302       break;
1303    }
1304
1305    case ast_aggregate: {
1306       printf("{ ");
1307       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1308          if (&ast->link != this->expressions.get_head())
1309             printf(", ");
1310
1311          ast->print();
1312       }
1313       printf("} ");
1314       break;
1315    }
1316
1317    default:
1318       assert(0);
1319       break;
1320    }
1321 }
1322
1323 ast_expression::ast_expression(int oper,
1324                                ast_expression *ex0,
1325                                ast_expression *ex1,
1326                                ast_expression *ex2) :
1327    primary_expression()
1328 {
1329    this->oper = ast_operators(oper);
1330    this->subexpressions[0] = ex0;
1331    this->subexpressions[1] = ex1;
1332    this->subexpressions[2] = ex2;
1333    this->non_lvalue_description = NULL;
1334    this->is_lhs = false;
1335 }
1336
1337
1338 void
1339 ast_expression_statement::print(void) const
1340 {
1341    if (expression)
1342       expression->print();
1343
1344    printf("; ");
1345 }
1346
1347
1348 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1349    expression(ex)
1350 {
1351    /* empty */
1352 }
1353
1354
1355 void
1356 ast_function::print(void) const
1357 {
1358    return_type->print();
1359    printf(" %s (", identifier);
1360
1361    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1362       ast->print();
1363    }
1364
1365    printf(")");
1366 }
1367
1368
1369 ast_function::ast_function(void)
1370    : return_type(NULL), identifier(NULL), is_definition(false),
1371      signature(NULL)
1372 {
1373    /* empty */
1374 }
1375
1376
1377 void
1378 ast_fully_specified_type::print(void) const
1379 {
1380    _mesa_ast_type_qualifier_print(& qualifier);
1381    specifier->print();
1382 }
1383
1384
1385 void
1386 ast_parameter_declarator::print(void) const
1387 {
1388    type->print();
1389    if (identifier)
1390       printf("%s ", identifier);
1391    ast_opt_array_dimensions_print(array_specifier);
1392 }
1393
1394
1395 void
1396 ast_function_definition::print(void) const
1397 {
1398    prototype->print();
1399    body->print();
1400 }
1401
1402
1403 void
1404 ast_declaration::print(void) const
1405 {
1406    printf("%s ", identifier);
1407    ast_opt_array_dimensions_print(array_specifier);
1408
1409    if (initializer) {
1410       printf("= ");
1411       initializer->print();
1412    }
1413 }
1414
1415
1416 ast_declaration::ast_declaration(const char *identifier,
1417                                  ast_array_specifier *array_specifier,
1418                                  ast_expression *initializer)
1419 {
1420    this->identifier = identifier;
1421    this->array_specifier = array_specifier;
1422    this->initializer = initializer;
1423 }
1424
1425
1426 void
1427 ast_declarator_list::print(void) const
1428 {
1429    assert(type || invariant);
1430
1431    if (type)
1432       type->print();
1433    else if (invariant)
1434       printf("invariant ");
1435    else
1436       printf("precise ");
1437
1438    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1439       if (&ast->link != this->declarations.get_head())
1440          printf(", ");
1441
1442       ast->print();
1443    }
1444
1445    printf("; ");
1446 }
1447
1448
1449 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1450 {
1451    this->type = type;
1452    this->invariant = false;
1453    this->precise = false;
1454 }
1455
1456 void
1457 ast_jump_statement::print(void) const
1458 {
1459    switch (mode) {
1460    case ast_continue:
1461       printf("continue; ");
1462       break;
1463    case ast_break:
1464       printf("break; ");
1465       break;
1466    case ast_return:
1467       printf("return ");
1468       if (opt_return_value)
1469          opt_return_value->print();
1470
1471       printf("; ");
1472       break;
1473    case ast_discard:
1474       printf("discard; ");
1475       break;
1476    }
1477 }
1478
1479
1480 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1481    : opt_return_value(NULL)
1482 {
1483    this->mode = ast_jump_modes(mode);
1484
1485    if (mode == ast_return)
1486       opt_return_value = return_value;
1487 }
1488
1489
1490 void
1491 ast_selection_statement::print(void) const
1492 {
1493    printf("if ( ");
1494    condition->print();
1495    printf(") ");
1496
1497    then_statement->print();
1498
1499    if (else_statement) {
1500       printf("else ");
1501       else_statement->print();
1502    }
1503 }
1504
1505
1506 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1507                                                  ast_node *then_statement,
1508                                                  ast_node *else_statement)
1509 {
1510    this->condition = condition;
1511    this->then_statement = then_statement;
1512    this->else_statement = else_statement;
1513 }
1514
1515
1516 void
1517 ast_switch_statement::print(void) const
1518 {
1519    printf("switch ( ");
1520    test_expression->print();
1521    printf(") ");
1522
1523    body->print();
1524 }
1525
1526
1527 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1528                                            ast_node *body)
1529 {
1530    this->test_expression = test_expression;
1531    this->body = body;
1532 }
1533
1534
1535 void
1536 ast_switch_body::print(void) const
1537 {
1538    printf("{\n");
1539    if (stmts != NULL) {
1540       stmts->print();
1541    }
1542    printf("}\n");
1543 }
1544
1545
1546 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1547 {
1548    this->stmts = stmts;
1549 }
1550
1551
1552 void ast_case_label::print(void) const
1553 {
1554    if (test_value != NULL) {
1555       printf("case ");
1556       test_value->print();
1557       printf(": ");
1558    } else {
1559       printf("default: ");
1560    }
1561 }
1562
1563
1564 ast_case_label::ast_case_label(ast_expression *test_value)
1565 {
1566    this->test_value = test_value;
1567 }
1568
1569
1570 void ast_case_label_list::print(void) const
1571 {
1572    foreach_list_typed(ast_node, ast, link, & this->labels) {
1573       ast->print();
1574    }
1575    printf("\n");
1576 }
1577
1578
1579 ast_case_label_list::ast_case_label_list(void)
1580 {
1581 }
1582
1583
1584 void ast_case_statement::print(void) const
1585 {
1586    labels->print();
1587    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1588       ast->print();
1589       printf("\n");
1590    }
1591 }
1592
1593
1594 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1595 {
1596    this->labels = labels;
1597 }
1598
1599
1600 void ast_case_statement_list::print(void) const
1601 {
1602    foreach_list_typed(ast_node, ast, link, & this->cases) {
1603       ast->print();
1604    }
1605 }
1606
1607
1608 ast_case_statement_list::ast_case_statement_list(void)
1609 {
1610 }
1611
1612
1613 void
1614 ast_iteration_statement::print(void) const
1615 {
1616    switch (mode) {
1617    case ast_for:
1618       printf("for( ");
1619       if (init_statement)
1620          init_statement->print();
1621       printf("; ");
1622
1623       if (condition)
1624          condition->print();
1625       printf("; ");
1626
1627       if (rest_expression)
1628          rest_expression->print();
1629       printf(") ");
1630
1631       body->print();
1632       break;
1633
1634    case ast_while:
1635       printf("while ( ");
1636       if (condition)
1637          condition->print();
1638       printf(") ");
1639       body->print();
1640       break;
1641
1642    case ast_do_while:
1643       printf("do ");
1644       body->print();
1645       printf("while ( ");
1646       if (condition)
1647          condition->print();
1648       printf("); ");
1649       break;
1650    }
1651 }
1652
1653
1654 ast_iteration_statement::ast_iteration_statement(int mode,
1655                                                  ast_node *init,
1656                                                  ast_node *condition,
1657                                                  ast_expression *rest_expression,
1658                                                  ast_node *body)
1659 {
1660    this->mode = ast_iteration_modes(mode);
1661    this->init_statement = init;
1662    this->condition = condition;
1663    this->rest_expression = rest_expression;
1664    this->body = body;
1665 }
1666
1667
1668 void
1669 ast_struct_specifier::print(void) const
1670 {
1671    printf("struct %s { ", name);
1672    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1673       ast->print();
1674    }
1675    printf("} ");
1676 }
1677
1678
1679 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1680                                            ast_declarator_list *declarator_list)
1681    : name(identifier), layout(NULL), declarations(), is_declaration(true),
1682      type(NULL)
1683 {
1684    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1685 }
1686
1687 void ast_subroutine_list::print(void) const
1688 {
1689    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1690       if (&ast->link != this->declarations.get_head())
1691          printf(", ");
1692       ast->print();
1693    }
1694 }
1695
1696 static void
1697 set_shader_inout_layout(struct gl_shader *shader,
1698                      struct _mesa_glsl_parse_state *state)
1699 {
1700    /* Should have been prevented by the parser. */
1701    if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1702        shader->Stage == MESA_SHADER_VERTEX) {
1703       assert(!state->in_qualifier->flags.i);
1704    } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1705               shader->Stage != MESA_SHADER_TESS_EVAL) {
1706       assert(!state->in_qualifier->flags.i);
1707    }
1708
1709    if (shader->Stage != MESA_SHADER_COMPUTE) {
1710       /* Should have been prevented by the parser. */
1711       assert(!state->cs_input_local_size_specified);
1712       assert(!state->cs_input_local_size_variable_specified);
1713    }
1714
1715    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1716       /* Should have been prevented by the parser. */
1717       assert(!state->fs_uses_gl_fragcoord);
1718       assert(!state->fs_redeclares_gl_fragcoord);
1719       assert(!state->fs_pixel_center_integer);
1720       assert(!state->fs_origin_upper_left);
1721       assert(!state->fs_early_fragment_tests);
1722       assert(!state->fs_inner_coverage);
1723       assert(!state->fs_post_depth_coverage);
1724    }
1725
1726    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1727       if (state->out_qualifier->out_xfb_stride[i]) {
1728          unsigned xfb_stride;
1729          if (state->out_qualifier->out_xfb_stride[i]->
1730                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1731                 true)) {
1732             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1733          }
1734       }
1735    }
1736
1737    switch (shader->Stage) {
1738    case MESA_SHADER_TESS_CTRL:
1739       shader->info.TessCtrl.VerticesOut = 0;
1740       if (state->tcs_output_vertices_specified) {
1741          unsigned vertices;
1742          if (state->out_qualifier->vertices->
1743                process_qualifier_constant(state, "vertices", &vertices,
1744                                           false)) {
1745
1746             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1747             if (vertices > state->Const.MaxPatchVertices) {
1748                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1749                                 "GL_MAX_PATCH_VERTICES", vertices);
1750             }
1751             shader->info.TessCtrl.VerticesOut = vertices;
1752          }
1753       }
1754       break;
1755    case MESA_SHADER_TESS_EVAL:
1756       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1757       if (state->in_qualifier->flags.q.prim_type)
1758          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1759
1760       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1761       if (state->in_qualifier->flags.q.vertex_spacing)
1762          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1763
1764       shader->info.TessEval.VertexOrder = 0;
1765       if (state->in_qualifier->flags.q.ordering)
1766          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1767
1768       shader->info.TessEval.PointMode = -1;
1769       if (state->in_qualifier->flags.q.point_mode)
1770          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1771       break;
1772    case MESA_SHADER_GEOMETRY:
1773       shader->info.Geom.VerticesOut = -1;
1774       if (state->out_qualifier->flags.q.max_vertices) {
1775          unsigned qual_max_vertices;
1776          if (state->out_qualifier->max_vertices->
1777                process_qualifier_constant(state, "max_vertices",
1778                                           &qual_max_vertices, true)) {
1779
1780             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1781                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1782                _mesa_glsl_error(&loc, state,
1783                                 "maximum output vertices (%d) exceeds "
1784                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1785                                 qual_max_vertices);
1786             }
1787             shader->info.Geom.VerticesOut = qual_max_vertices;
1788          }
1789       }
1790
1791       if (state->gs_input_prim_type_specified) {
1792          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1793       } else {
1794          shader->info.Geom.InputType = PRIM_UNKNOWN;
1795       }
1796
1797       if (state->out_qualifier->flags.q.prim_type) {
1798          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1799       } else {
1800          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1801       }
1802
1803       shader->info.Geom.Invocations = 0;
1804       if (state->in_qualifier->flags.q.invocations) {
1805          unsigned invocations;
1806          if (state->in_qualifier->invocations->
1807                process_qualifier_constant(state, "invocations",
1808                                           &invocations, false)) {
1809
1810             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1811             if (invocations > MAX_GEOMETRY_SHADER_INVOCATIONS) {
1812                _mesa_glsl_error(&loc, state,
1813                                 "invocations (%d) exceeds "
1814                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1815                                 invocations);
1816             }
1817             shader->info.Geom.Invocations = invocations;
1818          }
1819       }
1820       break;
1821
1822    case MESA_SHADER_COMPUTE:
1823       if (state->cs_input_local_size_specified) {
1824          for (int i = 0; i < 3; i++)
1825             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1826       } else {
1827          for (int i = 0; i < 3; i++)
1828             shader->info.Comp.LocalSize[i] = 0;
1829       }
1830
1831       shader->info.Comp.LocalSizeVariable =
1832          state->cs_input_local_size_variable_specified;
1833       break;
1834
1835    case MESA_SHADER_FRAGMENT:
1836       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1837       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1838       shader->pixel_center_integer = state->fs_pixel_center_integer;
1839       shader->origin_upper_left = state->fs_origin_upper_left;
1840       shader->ARB_fragment_coord_conventions_enable =
1841          state->ARB_fragment_coord_conventions_enable;
1842       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1843       shader->InnerCoverage = state->fs_inner_coverage;
1844       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1845       shader->BlendSupport = state->fs_blend_support;
1846       break;
1847
1848    default:
1849       /* Nothing to do. */
1850       break;
1851    }
1852
1853    shader->bindless_sampler = state->bindless_sampler_specified;
1854    shader->bindless_image = state->bindless_image_specified;
1855    shader->bound_sampler = state->bound_sampler_specified;
1856    shader->bound_image = state->bound_image_specified;
1857 }
1858
1859 /* src can be NULL if only the symbols found in the exec_list should be
1860  * copied
1861  */
1862 void
1863 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1864                                    struct glsl_symbol_table *src,
1865                                    struct glsl_symbol_table *dest)
1866 {
1867    foreach_in_list (ir_instruction, ir, shader_ir) {
1868       switch (ir->ir_type) {
1869       case ir_type_function:
1870          dest->add_function((ir_function *) ir);
1871          break;
1872       case ir_type_variable: {
1873          ir_variable *const var = (ir_variable *) ir;
1874
1875          if (var->data.mode != ir_var_temporary)
1876             dest->add_variable(var);
1877          break;
1878       }
1879       default:
1880          break;
1881       }
1882    }
1883
1884    if (src != NULL) {
1885       /* Explicitly copy the gl_PerVertex interface definitions because these
1886        * are needed to check they are the same during the interstage link.
1887        * They can’t necessarily be found via the exec_list because the members
1888        * might not be referenced. The GL spec still requires that they match
1889        * in that case.
1890        */
1891       const glsl_type *iface =
1892          src->get_interface("gl_PerVertex", ir_var_shader_in);
1893       if (iface)
1894          dest->add_interface(iface->name, iface, ir_var_shader_in);
1895
1896       iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1897       if (iface)
1898          dest->add_interface(iface->name, iface, ir_var_shader_out);
1899    }
1900 }
1901
1902 extern "C" {
1903
1904 static void
1905 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1906 {
1907    int j, k;
1908    int index = 0;
1909
1910    for (j = 0; j < state->num_subroutines; j++) {
1911       while (state->subroutines[j]->subroutine_index == -1) {
1912          for (k = 0; k < state->num_subroutines; k++) {
1913             if (state->subroutines[k]->subroutine_index == index)
1914                break;
1915             else if (k == state->num_subroutines - 1) {
1916                state->subroutines[j]->subroutine_index = index;
1917             }
1918          }
1919          index++;
1920       }
1921    }
1922 }
1923
1924 static void
1925 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1926                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1927                     struct glcpp_parser *data,
1928                     unsigned version,
1929                     bool es)
1930 {
1931    unsigned gl_version = state->ctx->Extensions.Version;
1932    gl_api api = state->ctx->API;
1933
1934    if (gl_version != 0xff) {
1935       unsigned i;
1936       for (i = 0; i < state->num_supported_versions; i++) {
1937          if (state->supported_versions[i].ver == version &&
1938              state->supported_versions[i].es == es) {
1939             gl_version = state->supported_versions[i].gl_ver;
1940             break;
1941          }
1942       }
1943
1944       if (i == state->num_supported_versions)
1945          return;
1946    }
1947
1948    if (es)
1949       api = API_OPENGLES2;
1950
1951    for (unsigned i = 0;
1952         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
1953       const _mesa_glsl_extension *extension
1954          = &_mesa_glsl_supported_extensions[i];
1955       if (extension->compatible_with_state(state, api, gl_version)) {
1956          add_builtin_define(data, extension->name, 1);
1957       }
1958    }
1959 }
1960
1961 /* Implements parsing checks that we can't do during parsing */
1962 static void
1963 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
1964 {
1965    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
1966       YYLTYPE loc;
1967       memset(&loc, 0, sizeof(loc));
1968       _mesa_glsl_error(&loc, state, "Compute shaders require "
1969                        "GLSL 4.30 or GLSL ES 3.10");
1970    }
1971 }
1972
1973 static void
1974 opt_shader_and_create_symbol_table(struct gl_context *ctx,
1975                                    struct glsl_symbol_table *source_symbols,
1976                                    struct gl_shader *shader)
1977 {
1978    assert(shader->CompileStatus != COMPILE_FAILURE &&
1979           !shader->ir->is_empty());
1980
1981    struct gl_shader_compiler_options *options =
1982       &ctx->Const.ShaderCompilerOptions[shader->Stage];
1983
1984    /* Do some optimization at compile time to reduce shader IR size
1985     * and reduce later work if the same shader is linked multiple times
1986     */
1987    if (ctx->Const.GLSLOptimizeConservatively) {
1988       /* Run it just once. */
1989       do_common_optimization(shader->ir, false, false, options,
1990                              ctx->Const.NativeIntegers);
1991    } else {
1992       /* Repeat it until it stops making changes. */
1993       while (do_common_optimization(shader->ir, false, false, options,
1994                                     ctx->Const.NativeIntegers))
1995          ;
1996    }
1997
1998    validate_ir_tree(shader->ir);
1999
2000    enum ir_variable_mode other;
2001    switch (shader->Stage) {
2002    case MESA_SHADER_VERTEX:
2003       other = ir_var_shader_in;
2004       break;
2005    case MESA_SHADER_FRAGMENT:
2006       other = ir_var_shader_out;
2007       break;
2008    default:
2009       /* Something invalid to ensure optimize_dead_builtin_uniforms
2010        * doesn't remove anything other than uniforms or constants.
2011        */
2012       other = ir_var_mode_count;
2013       break;
2014    }
2015
2016    optimize_dead_builtin_variables(shader->ir, other);
2017
2018    validate_ir_tree(shader->ir);
2019
2020    /* Retain any live IR, but trash the rest. */
2021    reparent_ir(shader->ir, shader->ir);
2022
2023    /* Destroy the symbol table.  Create a new symbol table that contains only
2024     * the variables and functions that still exist in the IR.  The symbol
2025     * table will be used later during linking.
2026     *
2027     * There must NOT be any freed objects still referenced by the symbol
2028     * table.  That could cause the linker to dereference freed memory.
2029     *
2030     * We don't have to worry about types or interface-types here because those
2031     * are fly-weights that are looked up by glsl_type.
2032     */
2033    _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2034                                       shader->symbols);
2035 }
2036
2037 void
2038 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2039                           bool dump_ast, bool dump_hir, bool force_recompile)
2040 {
2041    const char *source = force_recompile && shader->FallbackSource ?
2042       shader->FallbackSource : shader->Source;
2043
2044    if (!force_recompile) {
2045       if (ctx->Cache) {
2046          char buf[41];
2047          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2048                                 shader->sha1);
2049          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2050             /* We've seen this shader before and know it compiles */
2051             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2052                _mesa_sha1_format(buf, shader->sha1);
2053                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2054             }
2055             shader->CompileStatus = COMPILE_SKIPPED;
2056
2057             free((void *)shader->FallbackSource);
2058             shader->FallbackSource = NULL;
2059             return;
2060          }
2061       }
2062    } else {
2063       /* We should only ever end up here if a re-compile has been forced by a
2064        * shader cache miss. In which case we can skip the compile if its
2065        * already be done by a previous fallback or the initial compile call.
2066        */
2067       if (shader->CompileStatus == COMPILE_SUCCESS)
2068          return;
2069
2070       if (shader->CompileStatus == COMPILED_NO_OPTS) {
2071          opt_shader_and_create_symbol_table(ctx,
2072                                             NULL, /* source_symbols */
2073                                             shader);
2074          shader->CompileStatus = COMPILE_SUCCESS;
2075          return;
2076       }
2077    }
2078
2079    struct _mesa_glsl_parse_state *state =
2080       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2081
2082    if (ctx->Const.GenerateTemporaryNames)
2083       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2084                               false, true);
2085
2086    state->error = glcpp_preprocess(state, &source, &state->info_log,
2087                                    add_builtin_defines, state, ctx);
2088
2089    if (!state->error) {
2090      _mesa_glsl_lexer_ctor(state, source);
2091      _mesa_glsl_parse(state);
2092      _mesa_glsl_lexer_dtor(state);
2093      do_late_parsing_checks(state);
2094    }
2095
2096    if (dump_ast) {
2097       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2098          ast->print();
2099       }
2100       printf("\n\n");
2101    }
2102
2103    ralloc_free(shader->ir);
2104    shader->ir = new(shader) exec_list;
2105    if (!state->error && !state->translation_unit.is_empty())
2106       _mesa_ast_to_hir(shader->ir, state);
2107
2108    if (!state->error) {
2109       validate_ir_tree(shader->ir);
2110
2111       /* Print out the unoptimized IR. */
2112       if (dump_hir) {
2113          _mesa_print_ir(stdout, shader->ir, state);
2114       }
2115    }
2116
2117    if (shader->InfoLog)
2118       ralloc_free(shader->InfoLog);
2119
2120    if (!state->error)
2121       set_shader_inout_layout(shader, state);
2122
2123    shader->symbols = new(shader->ir) glsl_symbol_table;
2124    shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2125    shader->InfoLog = state->info_log;
2126    shader->Version = state->language_version;
2127    shader->IsES = state->es_shader;
2128
2129    if (!state->error && !shader->ir->is_empty()) {
2130       assign_subroutine_indexes(state);
2131       lower_subroutine(shader->ir, state);
2132
2133       if (!ctx->Cache || force_recompile)
2134          opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2135       else {
2136          reparent_ir(shader->ir, shader->ir);
2137          shader->CompileStatus = COMPILED_NO_OPTS;
2138       }
2139    }
2140
2141    if (!force_recompile) {
2142       free((void *)shader->FallbackSource);
2143       shader->FallbackSource = NULL;
2144    }
2145
2146    delete state->symbols;
2147    ralloc_free(state);
2148 }
2149
2150 } /* extern "C" */
2151 /**
2152  * Do the set of common optimizations passes
2153  *
2154  * \param ir                          List of instructions to be optimized
2155  * \param linked                      Is the shader linked?  This enables
2156  *                                    optimizations passes that remove code at
2157  *                                    global scope and could cause linking to
2158  *                                    fail.
2159  * \param uniform_locations_assigned  Have locations already been assigned for
2160  *                                    uniforms?  This prevents the declarations
2161  *                                    of unused uniforms from being removed.
2162  *                                    The setting of this flag only matters if
2163  *                                    \c linked is \c true.
2164  * \param options                     The driver's preferred shader options.
2165  * \param native_integers             Selects optimizations that depend on the
2166  *                                    implementations supporting integers
2167  *                                    natively (as opposed to supporting
2168  *                                    integers in floating point registers).
2169  */
2170 bool
2171 do_common_optimization(exec_list *ir, bool linked,
2172                        bool uniform_locations_assigned,
2173                        const struct gl_shader_compiler_options *options,
2174                        bool native_integers)
2175 {
2176    const bool debug = false;
2177    GLboolean progress = GL_FALSE;
2178
2179 #define OPT(PASS, ...) do {                                             \
2180       if (debug) {                                                      \
2181          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2182          const bool opt_progress = PASS(__VA_ARGS__);                   \
2183          progress = opt_progress || progress;                           \
2184          if (opt_progress)                                              \
2185             _mesa_print_ir(stderr, ir, NULL);                           \
2186          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2187                  #PASS, opt_progress ? "made" : "no");                  \
2188       } else {                                                          \
2189          progress = PASS(__VA_ARGS__) || progress;                      \
2190       }                                                                 \
2191    } while (false)
2192
2193    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2194
2195    if (linked) {
2196       OPT(do_function_inlining, ir);
2197       OPT(do_dead_functions, ir);
2198       OPT(do_structure_splitting, ir);
2199    }
2200    propagate_invariance(ir);
2201    OPT(do_if_simplification, ir);
2202    OPT(opt_flatten_nested_if_blocks, ir);
2203    OPT(opt_conditional_discard, ir);
2204    OPT(do_copy_propagation, ir);
2205    OPT(do_copy_propagation_elements, ir);
2206
2207    if (options->OptimizeForAOS && !linked)
2208       OPT(opt_flip_matrices, ir);
2209
2210    if (linked && options->OptimizeForAOS) {
2211       OPT(do_vectorize, ir);
2212    }
2213
2214    if (linked)
2215       OPT(do_dead_code, ir, uniform_locations_assigned);
2216    else
2217       OPT(do_dead_code_unlinked, ir);
2218    OPT(do_dead_code_local, ir);
2219    OPT(do_tree_grafting, ir);
2220    OPT(do_constant_propagation, ir);
2221    if (linked)
2222       OPT(do_constant_variable, ir);
2223    else
2224       OPT(do_constant_variable_unlinked, ir);
2225    OPT(do_constant_folding, ir);
2226    OPT(do_minmax_prune, ir);
2227    OPT(do_rebalance_tree, ir);
2228    OPT(do_algebraic, ir, native_integers, options);
2229    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2230        options->EmitNoCont, options->EmitNoLoops);
2231    OPT(do_vec_index_to_swizzle, ir);
2232    OPT(lower_vector_insert, ir, false);
2233    OPT(optimize_swizzles, ir);
2234
2235    OPT(optimize_split_arrays, ir, linked);
2236    OPT(optimize_redundant_jumps, ir);
2237
2238    if (options->MaxUnrollIterations) {
2239       loop_state *ls = analyze_loop_variables(ir);
2240       if (ls->loop_found) {
2241          bool loop_progress = unroll_loops(ir, ls, options);
2242          while (loop_progress) {
2243             loop_progress = false;
2244             loop_progress |= do_constant_propagation(ir);
2245             loop_progress |= do_if_simplification(ir);
2246
2247             /* Some drivers only call do_common_optimization() once rather
2248              * than in a loop. So we must call do_lower_jumps() after
2249              * unrolling a loop because for drivers that use LLVM validation
2250              * will fail if a jump is not the last instruction in the block.
2251              * For example the following will fail LLVM validation:
2252              *
2253              *   (loop (
2254              *      ...
2255              *   break
2256              *   (assign  (x) (var_ref v124)  (expression int + (var_ref v124)
2257              *      (constant int (1)) ) )
2258              *   ))
2259              */
2260             loop_progress |= do_lower_jumps(ir, true, true,
2261                                             options->EmitNoMainReturn,
2262                                             options->EmitNoCont,
2263                                             options->EmitNoLoops);
2264          }
2265          progress |= loop_progress;
2266       }
2267       delete ls;
2268    }
2269
2270 #undef OPT
2271
2272    return progress;
2273 }
2274
2275 extern "C" {
2276
2277 /**
2278  * To be called at GL teardown time, this frees compiler datastructures.
2279  *
2280  * After calling this, any previously compiled shaders and shader
2281  * programs would be invalid.  So this should happen at approximately
2282  * program exit.
2283  */
2284 void
2285 _mesa_destroy_shader_compiler(void)
2286 {
2287    _mesa_destroy_shader_compiler_caches();
2288
2289    _mesa_glsl_release_types();
2290 }
2291
2292 /**
2293  * Releases compiler caches to trade off performance for memory.
2294  *
2295  * Intended to be used with glReleaseShaderCompiler().
2296  */
2297 void
2298 _mesa_destroy_shader_compiler_caches(void)
2299 {
2300    _mesa_glsl_release_builtin_functions();
2301 }
2302
2303 }