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 <stdio.h>
  24 #include <stdarg.h>
  25 #include <string.h>
  26 #include <assert.h>
  27
  28 #include "main/core.h" /* for struct gl_context */
  29 #include "main/context.h"
  30 #include "main/debug_output.h"
  31 #include "main/shaderobj.h"
  32 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
  33 #include "util/ralloc.h"
  34 #include "ast.h"
  35 #include "glsl_parser_extras.h"
  36 #include "glsl_parser.h"
  37 #include "ir_optimization.h"
  38 #include "loop_analysis.h"
  39
  40 /**
  41  * Format a short human-readable description of the given GLSL version.
  42  */
  43 const char *
  44 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
  45 {
  46    return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
  47                           version / 100, version % 100);
  48 }
  49
  50
  51 static const unsigned known_desktop_glsl_versions[] =
  52    { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450 };
  53
  54
  55 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
  56                                                gl_shader_stage stage,
  57                                                void *mem_ctx)
  58    : ctx(_ctx), cs_input_local_size_specified(false), cs_input_local_size(),
  59      switch_state()
  60 {
  61    assert(stage < MESA_SHADER_STAGES);
  62    this->stage = stage;
  63
  64    this->scanner = NULL;
  65    this->translation_unit.make_empty();
  66    this->symbols = new(mem_ctx) glsl_symbol_table;
  67
  68    this->info_log = ralloc_strdup(mem_ctx, "");
  69    this->error = false;
  70    this->loop_nesting_ast = NULL;
  71
  72    this->uses_builtin_functions = false;
  73
  74    /* Set default language version and extensions */
  75    this->language_version = 110;
  76    this->forced_language_version = ctx->Const.ForceGLSLVersion;
  77    this->es_shader = false;
  78    this->ARB_texture_rectangle_enable = true;
  79
  80    /* OpenGL ES 2.0 has different defaults from desktop GL. */
  81    if (ctx->API == API_OPENGLES2) {
  82       this->language_version = 100;
  83       this->es_shader = true;
  84       this->ARB_texture_rectangle_enable = false;
  85    }
  86
  87    this->extensions = &ctx->Extensions;
  88
  89    this->Const.MaxLights = ctx->Const.MaxLights;
  90    this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
  91    this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
  92    this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
  93    this->Const.MaxVertexAttribs = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs;
  94    this->Const.MaxVertexUniformComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxUniformComponents;
  95    this->Const.MaxVertexTextureImageUnits = ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits;
  96    this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
  97    this->Const.MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
  98    this->Const.MaxFragmentUniformComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxUniformComponents;
  99    this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset;
 100    this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset;
 101
 102    this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
 103
 104    this->Const.MaxDualSourceDrawBuffers = ctx->Const.MaxDualSourceDrawBuffers;
 105
 106    /* 1.50 constants */
 107    this->Const.MaxVertexOutputComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents;
 108    this->Const.MaxGeometryInputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxInputComponents;
 109    this->Const.MaxGeometryOutputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxOutputComponents;
 110    this->Const.MaxFragmentInputComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents;
 111    this->Const.MaxGeometryTextureImageUnits = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits;
 112    this->Const.MaxGeometryOutputVertices = ctx->Const.MaxGeometryOutputVertices;
 113    this->Const.MaxGeometryTotalOutputComponents = ctx->Const.MaxGeometryTotalOutputComponents;
 114    this->Const.MaxGeometryUniformComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxUniformComponents;
 115
 116    this->Const.MaxVertexAtomicCounters = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicCounters;
 117    this->Const.MaxTessControlAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters;
 118    this->Const.MaxTessEvaluationAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicCounters;
 119    this->Const.MaxGeometryAtomicCounters = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicCounters;
 120    this->Const.MaxFragmentAtomicCounters = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
 121    this->Const.MaxComputeAtomicCounters = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicCounters;
 122    this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
 123    this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
 124    this->Const.MaxVertexAtomicCounterBuffers =
 125       ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicBuffers;
 126    this->Const.MaxTessControlAtomicCounterBuffers =
 127       ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers;
 128    this->Const.MaxTessEvaluationAtomicCounterBuffers =
 129       ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers;
 130    this->Const.MaxGeometryAtomicCounterBuffers =
 131       ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers;
 132    this->Const.MaxFragmentAtomicCounterBuffers =
 133       ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
 134    this->Const.MaxComputeAtomicCounterBuffers =
 135       ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers;
 136    this->Const.MaxCombinedAtomicCounterBuffers =
 137       ctx->Const.MaxCombinedAtomicBuffers;
 138    this->Const.MaxAtomicCounterBufferSize =
 139       ctx->Const.MaxAtomicBufferSize;
 140
 141    /* ARB_enhanced_layouts constants */
 142    this->Const.MaxTransformFeedbackBuffers = ctx->Const.MaxTransformFeedbackBuffers;
 143    this->Const.MaxTransformFeedbackInterleavedComponents = ctx->Const.MaxTransformFeedbackInterleavedComponents;
 144
 145    /* Compute shader constants */
 146    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupCount); i++)
 147       this->Const.MaxComputeWorkGroupCount[i] = ctx->Const.MaxComputeWorkGroupCount[i];
 148    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupSize); i++)
 149       this->Const.MaxComputeWorkGroupSize[i] = ctx->Const.MaxComputeWorkGroupSize[i];
 150
 151    this->Const.MaxComputeTextureImageUnits = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
 152    this->Const.MaxComputeUniformComponents = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxUniformComponents;
 153
 154    this->Const.MaxImageUnits = ctx->Const.MaxImageUnits;
 155    this->Const.MaxCombinedShaderOutputResources = ctx->Const.MaxCombinedShaderOutputResources;
 156    this->Const.MaxImageSamples = ctx->Const.MaxImageSamples;
 157    this->Const.MaxVertexImageUniforms = ctx->Const.Program[MESA_SHADER_VERTEX].MaxImageUniforms;
 158    this->Const.MaxTessControlImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms;
 159    this->Const.MaxTessEvaluationImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms;
 160    this->Const.MaxGeometryImageUniforms = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxImageUniforms;
 161    this->Const.MaxFragmentImageUniforms = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxImageUniforms;
 162    this->Const.MaxComputeImageUniforms = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
 163    this->Const.MaxCombinedImageUniforms = ctx->Const.MaxCombinedImageUniforms;
 164
 165    /* ARB_viewport_array */
 166    this->Const.MaxViewports = ctx->Const.MaxViewports;
 167
 168    /* tessellation shader constants */
 169    this->Const.MaxPatchVertices = ctx->Const.MaxPatchVertices;
 170    this->Const.MaxTessGenLevel = ctx->Const.MaxTessGenLevel;
 171    this->Const.MaxTessControlInputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents;
 172    this->Const.MaxTessControlOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents;
 173    this->Const.MaxTessControlTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits;
 174    this->Const.MaxTessEvaluationInputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents;
 175    this->Const.MaxTessEvaluationOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents;
 176    this->Const.MaxTessEvaluationTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits;
 177    this->Const.MaxTessPatchComponents = ctx->Const.MaxTessPatchComponents;
 178    this->Const.MaxTessControlTotalOutputComponents = ctx->Const.MaxTessControlTotalOutputComponents;
 179    this->Const.MaxTessControlUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents;
 180    this->Const.MaxTessEvaluationUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents;
 181
 182    /* GL 4.5 / OES_sample_variables */
 183    this->Const.MaxSamples = ctx->Const.MaxSamples;
 184
 185    this->current_function = NULL;
 186    this->toplevel_ir = NULL;
 187    this->found_return = false;
 188    this->all_invariant = false;
 189    this->user_structures = NULL;
 190    this->num_user_structures = 0;
 191    this->num_subroutines = 0;
 192    this->subroutines = NULL;
 193    this->num_subroutine_types = 0;
 194    this->subroutine_types = NULL;
 195
 196    /* supported_versions should be large enough to support the known desktop
 197     * GLSL versions plus 3 GLES versions (ES 1.00, ES 3.00, and ES 3.10))
 198     */
 199    STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 3) ==
 200                  ARRAY_SIZE(this->supported_versions));
 201
 202    /* Populate the list of supported GLSL versions */
 203    /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
 204     * the OpenGL 3.2 Core context is supported, this logic will need
 205     * change.  Older versions of GLSL are no longer supported
 206     * outside the compatibility contexts of 3.x.
 207     */
 208    this->num_supported_versions = 0;
 209    if (_mesa_is_desktop_gl(ctx)) {
 210       for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
 211          if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
 212             this->supported_versions[this->num_supported_versions].ver
 213                = known_desktop_glsl_versions[i];
 214             this->supported_versions[this->num_supported_versions].es = false;
 215             this->num_supported_versions++;
 216          }
 217       }
 218    }
 219    if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
 220       this->supported_versions[this->num_supported_versions].ver = 100;
 221       this->supported_versions[this->num_supported_versions].es = true;
 222       this->num_supported_versions++;
 223    }
 224    if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
 225       this->supported_versions[this->num_supported_versions].ver = 300;
 226       this->supported_versions[this->num_supported_versions].es = true;
 227       this->num_supported_versions++;
 228    }
 229    if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
 230       this->supported_versions[this->num_supported_versions].ver = 310;
 231       this->supported_versions[this->num_supported_versions].es = true;
 232       this->num_supported_versions++;
 233    }
 234    if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
 235        ctx->Extensions.ARB_ES3_2_compatibility) {
 236       this->supported_versions[this->num_supported_versions].ver = 320;
 237       this->supported_versions[this->num_supported_versions].es = true;
 238       this->num_supported_versions++;
 239    }
 240
 241    /* Create a string for use in error messages to tell the user which GLSL
 242     * versions are supported.
 243     */
 244    char *supported = ralloc_strdup(this, "");
 245    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 246       unsigned ver = this->supported_versions[i].ver;
 247       const char *const prefix = (i == 0)
 248          ? ""
 249          : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
 250       const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
 251
 252       ralloc_asprintf_append(& supported, "%s%u.%02u%s",
 253                              prefix,
 254                              ver / 100, ver % 100,
 255                              suffix);
 256    }
 257
 258    this->supported_version_string = supported;
 259
 260    if (ctx->Const.ForceGLSLExtensionsWarn)
 261       _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
 262
 263    this->default_uniform_qualifier = new(this) ast_type_qualifier();
 264    this->default_uniform_qualifier->flags.q.shared = 1;
 265    this->default_uniform_qualifier->flags.q.column_major = 1;
 266    this->default_uniform_qualifier->is_default_qualifier = true;
 267
 268    this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
 269    this->default_shader_storage_qualifier->flags.q.shared = 1;
 270    this->default_shader_storage_qualifier->flags.q.column_major = 1;
 271    this->default_shader_storage_qualifier->is_default_qualifier = true;
 272
 273    this->fs_uses_gl_fragcoord = false;
 274    this->fs_redeclares_gl_fragcoord = false;
 275    this->fs_origin_upper_left = false;
 276    this->fs_pixel_center_integer = false;
 277    this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
 278
 279    this->gs_input_prim_type_specified = false;
 280    this->tcs_output_vertices_specified = false;
 281    this->gs_input_size = 0;
 282    this->in_qualifier = new(this) ast_type_qualifier();
 283    this->out_qualifier = new(this) ast_type_qualifier();
 284    this->fs_early_fragment_tests = false;
 285    memset(this->atomic_counter_offsets, 0,
 286           sizeof(this->atomic_counter_offsets));
 287    this->allow_extension_directive_midshader =
 288       ctx->Const.AllowGLSLExtensionDirectiveMidShader;
 289 }
 290
 291 /**
 292  * Determine whether the current GLSL version is sufficiently high to support
 293  * a certain feature, and generate an error message if it isn't.
 294  *
 295  * \param required_glsl_version and \c required_glsl_es_version are
 296  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 297  *
 298  * \param locp is the parser location where the error should be reported.
 299  *
 300  * \param fmt (and additional arguments) constitute a printf-style error
 301  * message to report if the version check fails.  Information about the
 302  * current and required GLSL versions will be appended.  So, for example, if
 303  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 304  * "foo unsupported") is called, the error message will be "foo unsupported in
 305  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 306  */
 307 bool
 308 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 309                                       unsigned required_glsl_es_version,
 310                                       YYLTYPE *locp, const char *fmt, ...)
 311 {
 312    if (this->is_version(required_glsl_version, required_glsl_es_version))
 313       return true;
 314
 315    va_list args;
 316    va_start(args, fmt);
 317    char *problem = ralloc_vasprintf(this, fmt, args);
 318    va_end(args);
 319    const char *glsl_version_string
 320       = glsl_compute_version_string(this, false, required_glsl_version);
 321    const char *glsl_es_version_string
 322       = glsl_compute_version_string(this, true, required_glsl_es_version);
 323    const char *requirement_string = "";
 324    if (required_glsl_version && required_glsl_es_version) {
 325       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 326                                            glsl_version_string,
 327                                            glsl_es_version_string);
 328    } else if (required_glsl_version) {
 329       requirement_string = ralloc_asprintf(this, " (%s required)",
 330                                            glsl_version_string);
 331    } else if (required_glsl_es_version) {
 332       requirement_string = ralloc_asprintf(this, " (%s required)",
 333                                            glsl_es_version_string);
 334    }
 335    _mesa_glsl_error(locp, this, "%s in %s%s",
 336                     problem, this->get_version_string(),
 337                     requirement_string);
 338
 339    return false;
 340 }
 341
 342 /**
 343  * Process a GLSL #version directive.
 344  *
 345  * \param version is the integer that follows the #version token.
 346  *
 347  * \param ident is a string identifier that follows the integer, if any is
 348  * present.  Otherwise NULL.
 349  */
 350 void
 351 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 352                                                   const char *ident)
 353 {
 354    bool es_token_present = false;
 355    if (ident) {
 356       if (strcmp(ident, "es") == 0) {
 357          es_token_present = true;
 358       } else if (version >= 150) {
 359          if (strcmp(ident, "core") == 0) {
 360             /* Accept the token.  There's no need to record that this is
 361              * a core profile shader since that's the only profile we support.
 362              */
 363          } else if (strcmp(ident, "compatibility") == 0) {
 364             _mesa_glsl_error(locp, this,
 365                              "the compatibility profile is not supported");
 366          } else {
 367             _mesa_glsl_error(locp, this,
 368                              "\"%s\" is not a valid shading language profile; "
 369                              "if present, it must be \"core\"", ident);
 370          }
 371       } else {
 372          _mesa_glsl_error(locp, this,
 373                           "illegal text following version number");
 374       }
 375    }
 376
 377    this->es_shader = es_token_present;
 378    if (version == 100) {
 379       if (es_token_present) {
 380          _mesa_glsl_error(locp, this,
 381                           "GLSL 1.00 ES should be selected using "
 382                           "`#version 100'");
 383       } else {
 384          this->es_shader = true;
 385       }
 386    }
 387
 388    if (this->es_shader) {
 389       this->ARB_texture_rectangle_enable = false;
 390    }
 391
 392    if (this->forced_language_version)
 393       this->language_version = this->forced_language_version;
 394    else
 395       this->language_version = version;
 396
 397    bool supported = false;
 398    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 399       if (this->supported_versions[i].ver == this->language_version
 400           && this->supported_versions[i].es == this->es_shader) {
 401          supported = true;
 402          break;
 403       }
 404    }
 405
 406    if (!supported) {
 407       _mesa_glsl_error(locp, this, "%s is not supported. "
 408                        "Supported versions are: %s",
 409                        this->get_version_string(),
 410                        this->supported_version_string);
 411
 412       /* On exit, the language_version must be set to a valid value.
 413        * Later calls to _mesa_glsl_initialize_types will misbehave if
 414        * the version is invalid.
 415        */
 416       switch (this->ctx->API) {
 417       case API_OPENGL_COMPAT:
 418       case API_OPENGL_CORE:
 419          this->language_version = this->ctx->Const.GLSLVersion;
 420          break;
 421
 422       case API_OPENGLES:
 423          assert(!"Should not get here.");
 424          /* FALLTHROUGH */
 425
 426       case API_OPENGLES2:
 427          this->language_version = 100;
 428          break;
 429       }
 430    }
 431 }
 432
 433
 434 /* This helper function will append the given message to the shader's
 435    info log and report it via GL_ARB_debug_output. Per that extension,
 436    'type' is one of the enum values classifying the message, and
 437    'id' is the implementation-defined ID of the given message. */
 438 static void
 439 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 440                GLenum type, const char *fmt, va_list ap)
 441 {
 442    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 443    GLuint msg_id = 0;
 444
 445    assert(state->info_log != NULL);
 446
 447    /* Get the offset that the new message will be written to. */
 448    int msg_offset = strlen(state->info_log);
 449
 450    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 451                                             locp->source,
 452                                             locp->first_line,
 453                                             locp->first_column,
 454                                             error ? "error" : "warning");
 455    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 456
 457    const char *const msg = &state->info_log[msg_offset];
 458    struct gl_context *ctx = state->ctx;
 459
 460    /* Report the error via GL_ARB_debug_output. */
 461    _mesa_shader_debug(ctx, type, &msg_id, msg);
 462
 463    ralloc_strcat(&state->info_log, "\n");
 464 }
 465
 466 void
 467 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 468                  const char *fmt, ...)
 469 {
 470    va_list ap;
 471
 472    state->error = true;
 473
 474    va_start(ap, fmt);
 475    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 476    va_end(ap);
 477 }
 478
 479
 480 void
 481 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 482                    const char *fmt, ...)
 483 {
 484    va_list ap;
 485
 486    va_start(ap, fmt);
 487    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 488    va_end(ap);
 489 }
 490
 491
 492 /**
 493  * Enum representing the possible behaviors that can be specified in
 494  * an #extension directive.
 495  */
 496 enum ext_behavior {
 497    extension_disable,
 498    extension_enable,
 499    extension_require,
 500    extension_warn
 501 };
 502
 503 /**
 504  * Element type for _mesa_glsl_supported_extensions
 505  */
 506 struct _mesa_glsl_extension {
 507    /**
 508     * Name of the extension when referred to in a GLSL extension
 509     * statement
 510     */
 511    const char *name;
 512
 513    /** True if this extension is available to desktop GL shaders */
 514    bool avail_in_GL;
 515
 516    /** True if this extension is available to GLES shaders */
 517    bool avail_in_ES;
 518
 519    /**
 520     * Flag in the gl_extensions struct indicating whether this
 521     * extension is supported by the driver, or
 522     * &gl_extensions::dummy_true if supported by all drivers.
 523     *
 524     * Note: the type (GLboolean gl_extensions::*) is a "pointer to
 525     * member" type, the type-safe alternative to the "offsetof" macro.
 526     * In a nutshell:
 527     *
 528     * - foo bar::* p declares p to be an "offset" to a field of type
 529     *   foo that exists within struct bar
 530     * - &bar::baz computes the "offset" of field baz within struct bar
 531     * - x.*p accesses the field of x that exists at "offset" p
 532     * - x->*p is equivalent to (*x).*p
 533     */
 534    const GLboolean gl_extensions::* supported_flag;
 535
 536    /**
 537     * Flag in the _mesa_glsl_parse_state struct that should be set
 538     * when this extension is enabled.
 539     *
 540     * See note in _mesa_glsl_extension::supported_flag about "pointer
 541     * to member" types.
 542     */
 543    bool _mesa_glsl_parse_state::* enable_flag;
 544
 545    /**
 546     * Flag in the _mesa_glsl_parse_state struct that should be set
 547     * when the shader requests "warn" behavior for this extension.
 548     *
 549     * See note in _mesa_glsl_extension::supported_flag about "pointer
 550     * to member" types.
 551     */
 552    bool _mesa_glsl_parse_state::* warn_flag;
 553
 554
 555    bool compatible_with_state(const _mesa_glsl_parse_state *state) const;
 556    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 557 };
 558
 559 #define EXT(NAME, GL, ES, SUPPORTED_FLAG)                   \
 560    { "GL_" #NAME, GL, ES, &gl_extensions::SUPPORTED_FLAG,   \
 561          &_mesa_glsl_parse_state::NAME##_enable,            \
 562          &_mesa_glsl_parse_state::NAME##_warn }
 563
 564 /**
 565  * Table of extensions that can be enabled/disabled within a shader,
 566  * and the conditions under which they are supported.
 567  */
 568 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 569    /*                                  API availability */
 570    /* name                             GL     ES         supported flag */
 571
 572    /* ARB extensions go here, sorted alphabetically.
 573     */
 574    EXT(ARB_ES3_1_compatibility,          true,  false,     ARB_ES3_1_compatibility),
 575    EXT(ARB_ES3_2_compatibility,          true,  false,     ARB_ES3_2_compatibility),
 576    EXT(ARB_arrays_of_arrays,             true,  false,     ARB_arrays_of_arrays),
 577    EXT(ARB_compute_shader,               true,  false,     ARB_compute_shader),
 578    EXT(ARB_conservative_depth,           true,  false,     ARB_conservative_depth),
 579    EXT(ARB_cull_distance,                true,  false,     ARB_cull_distance),
 580    EXT(ARB_derivative_control,           true,  false,     ARB_derivative_control),
 581    EXT(ARB_draw_buffers,                 true,  false,     dummy_true),
 582    EXT(ARB_draw_instanced,               true,  false,     ARB_draw_instanced),
 583    EXT(ARB_enhanced_layouts,             true,  false,     ARB_enhanced_layouts),
 584    EXT(ARB_explicit_attrib_location,     true,  false,     ARB_explicit_attrib_location),
 585    EXT(ARB_explicit_uniform_location,    true,  false,     ARB_explicit_uniform_location),
 586    EXT(ARB_fragment_coord_conventions,   true,  false,     ARB_fragment_coord_conventions),
 587    EXT(ARB_fragment_layer_viewport,      true,  false,     ARB_fragment_layer_viewport),
 588    EXT(ARB_gpu_shader5,                  true,  false,     ARB_gpu_shader5),
 589    EXT(ARB_gpu_shader_fp64,              true,  false,     ARB_gpu_shader_fp64),
 590    EXT(ARB_sample_shading,               true,  false,     ARB_sample_shading),
 591    EXT(ARB_separate_shader_objects,      true,  false,     dummy_true),
 592    EXT(ARB_shader_atomic_counter_ops,    true,  false,     ARB_shader_atomic_counter_ops),
 593    EXT(ARB_shader_atomic_counters,       true,  false,     ARB_shader_atomic_counters),
 594    EXT(ARB_shader_bit_encoding,          true,  false,     ARB_shader_bit_encoding),
 595    EXT(ARB_shader_clock,                 true,  false,     ARB_shader_clock),
 596    EXT(ARB_shader_draw_parameters,       true,  false,     ARB_shader_draw_parameters),
 597    EXT(ARB_shader_image_load_store,      true,  false,     ARB_shader_image_load_store),
 598    EXT(ARB_shader_image_size,            true,  false,     ARB_shader_image_size),
 599    EXT(ARB_shader_precision,             true,  false,     ARB_shader_precision),
 600    EXT(ARB_shader_stencil_export,        true,  false,     ARB_shader_stencil_export),
 601    EXT(ARB_shader_storage_buffer_object, true,  true,      ARB_shader_storage_buffer_object),
 602    EXT(ARB_shader_subroutine,            true,  false,     ARB_shader_subroutine),
 603    EXT(ARB_shader_texture_image_samples, true,  false,     ARB_shader_texture_image_samples),
 604    EXT(ARB_shader_texture_lod,           true,  false,     ARB_shader_texture_lod),
 605    EXT(ARB_shading_language_420pack,     true,  false,     ARB_shading_language_420pack),
 606    EXT(ARB_shading_language_packing,     true,  false,     ARB_shading_language_packing),
 607    EXT(ARB_tessellation_shader,          true,  false,     ARB_tessellation_shader),
 608    EXT(ARB_texture_cube_map_array,       true,  false,     ARB_texture_cube_map_array),
 609    EXT(ARB_texture_gather,               true,  false,     ARB_texture_gather),
 610    EXT(ARB_texture_multisample,          true,  false,     ARB_texture_multisample),
 611    EXT(ARB_texture_query_levels,         true,  false,     ARB_texture_query_levels),
 612    EXT(ARB_texture_query_lod,            true,  false,     ARB_texture_query_lod),
 613    EXT(ARB_texture_rectangle,            true,  false,     dummy_true),
 614    EXT(ARB_uniform_buffer_object,        true,  false,     ARB_uniform_buffer_object),
 615    EXT(ARB_vertex_attrib_64bit,          true,  false,     ARB_vertex_attrib_64bit),
 616    EXT(ARB_viewport_array,               true,  false,     ARB_viewport_array),
 617
 618    /* KHR extensions go here, sorted alphabetically.
 619     */
 620
 621    /* OES extensions go here, sorted alphabetically.
 622     */
 623    EXT(OES_EGL_image_external,         false, true,      OES_EGL_image_external),
 624    EXT(OES_geometry_point_size,        false, true,      OES_geometry_shader),
 625    EXT(OES_geometry_shader,            false, true,      OES_geometry_shader),
 626    EXT(OES_gpu_shader5,                false, true,      ARB_gpu_shader5),
 627    EXT(OES_sample_variables,           false, true,      OES_sample_variables),
 628    EXT(OES_shader_image_atomic,        false, true,      ARB_shader_image_load_store),
 629    EXT(OES_shader_multisample_interpolation, false, true, OES_sample_variables),
 630    EXT(OES_standard_derivatives,       false, true,      OES_standard_derivatives),
 631    EXT(OES_texture_3D,                 false, true,      dummy_true),
 632    EXT(OES_texture_buffer,             false, true,      OES_texture_buffer),
 633    EXT(OES_texture_storage_multisample_2d_array, false, true, ARB_texture_multisample),
 634
 635    /* All other extensions go here, sorted alphabetically.
 636     */
 637    EXT(AMD_conservative_depth,         true,  false,     ARB_conservative_depth),
 638    EXT(AMD_shader_stencil_export,      true,  false,     ARB_shader_stencil_export),
 639    EXT(AMD_shader_trinary_minmax,      true,  false,     dummy_true),
 640    EXT(AMD_vertex_shader_layer,        true,  false,     AMD_vertex_shader_layer),
 641    EXT(AMD_vertex_shader_viewport_index, true,  false,   AMD_vertex_shader_viewport_index),
 642    EXT(EXT_blend_func_extended,        false,  true,     ARB_blend_func_extended),
 643    EXT(EXT_draw_buffers,               false,  true,     dummy_true),
 644    EXT(EXT_gpu_shader5,                false, true,      ARB_gpu_shader5),
 645    EXT(EXT_separate_shader_objects,    false, true,      dummy_true),
 646    EXT(EXT_shader_integer_mix,         true,  true,      EXT_shader_integer_mix),
 647    EXT(EXT_shader_samples_identical,   true,  true,      EXT_shader_samples_identical),
 648    EXT(EXT_texture_array,              true,  false,     EXT_texture_array),
 649    EXT(EXT_texture_buffer,             false, true,      OES_texture_buffer),
 650 };
 651
 652 #undef EXT
 653
 654
 655 /**
 656  * Determine whether a given extension is compatible with the target,
 657  * API, and extension information in the current parser state.
 658  */
 659 bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state *
 660                                                  state) const
 661 {
 662    /* Check that this extension matches whether we are compiling
 663     * for desktop GL or GLES.
 664     */
 665    if (state->es_shader) {
 666       if (!this->avail_in_ES) return false;
 667    } else {
 668       if (!this->avail_in_GL) return false;
 669    }
 670
 671    /* Check that this extension is supported by the OpenGL
 672     * implementation.
 673     *
 674     * Note: the ->* operator indexes into state->extensions by the
 675     * offset this->supported_flag.  See
 676     * _mesa_glsl_extension::supported_flag for more info.
 677     */
 678    return state->extensions->*(this->supported_flag);
 679 }
 680
 681 /**
 682  * Set the appropriate flags in the parser state to establish the
 683  * given behavior for this extension.
 684  */
 685 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 686                                      ext_behavior behavior) const
 687 {
 688    /* Note: the ->* operator indexes into state by the
 689     * offsets this->enable_flag and this->warn_flag.  See
 690     * _mesa_glsl_extension::supported_flag for more info.
 691     */
 692    state->*(this->enable_flag) = (behavior != extension_disable);
 693    state->*(this->warn_flag)   = (behavior == extension_warn);
 694 }
 695
 696 /**
 697  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 698  * the name is not found, return NULL.
 699  */
 700 static const _mesa_glsl_extension *find_extension(const char *name)
 701 {
 702    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 703       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 704          return &_mesa_glsl_supported_extensions[i];
 705       }
 706    }
 707    return NULL;
 708 }
 709
 710
 711 bool
 712 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 713                              const char *behavior_string, YYLTYPE *behavior_locp,
 714                              _mesa_glsl_parse_state *state)
 715 {
 716    ext_behavior behavior;
 717    if (strcmp(behavior_string, "warn") == 0) {
 718       behavior = extension_warn;
 719    } else if (strcmp(behavior_string, "require") == 0) {
 720       behavior = extension_require;
 721    } else if (strcmp(behavior_string, "enable") == 0) {
 722       behavior = extension_enable;
 723    } else if (strcmp(behavior_string, "disable") == 0) {
 724       behavior = extension_disable;
 725    } else {
 726       _mesa_glsl_error(behavior_locp, state,
 727                        "unknown extension behavior `%s'",
 728                        behavior_string);
 729       return false;
 730    }
 731
 732    if (strcmp(name, "all") == 0) {
 733       if ((behavior == extension_enable) || (behavior == extension_require)) {
 734          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 735                           (behavior == extension_enable)
 736                           ? "enable" : "require");
 737          return false;
 738       } else {
 739          for (unsigned i = 0;
 740               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 741             const _mesa_glsl_extension *extension
 742                = &_mesa_glsl_supported_extensions[i];
 743             if (extension->compatible_with_state(state)) {
 744                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 745             }
 746          }
 747       }
 748    } else {
 749       const _mesa_glsl_extension *extension = find_extension(name);
 750       if (extension && extension->compatible_with_state(state)) {
 751          extension->set_flags(state, behavior);
 752       } else {
 753          static const char fmt[] = "extension `%s' unsupported in %s shader";
 754
 755          if (behavior == extension_require) {
 756             _mesa_glsl_error(name_locp, state, fmt,
 757                              name, _mesa_shader_stage_to_string(state->stage));
 758             return false;
 759          } else {
 760             _mesa_glsl_warning(name_locp, state, fmt,
 761                                name, _mesa_shader_stage_to_string(state->stage));
 762          }
 763       }
 764    }
 765
 766    return true;
 767 }
 768
 769
 770 /**
 771  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 772  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 773  * (process_array_constructor, et al) sufficient information to do type
 774  * checking.
 775  *
 776  * Operates on assignments involving an aggregate initializer. E.g.,
 777  *
 778  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 779  *
 780  * or more ridiculously,
 781  *
 782  * struct S {
 783  *     vec4 v[2];
 784  * };
 785  *
 786  * struct {
 787  *     S a[2], b;
 788  *     int c;
 789  * } aggregate = {
 790  *     {
 791  *         {
 792  *             {
 793  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 794  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 795  *             } // a[0].v
 796  *         }, // a[0]
 797  *         {
 798  *             {
 799  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 800  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 801  *             } // a[1].v
 802  *         } // a[1]
 803  *     }, // a
 804  *     {
 805  *         {
 806  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 807  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 808  *         } // b.v
 809  *     }, // b
 810  *     4 // c
 811  * };
 812  *
 813  * This pass is necessary because the right-hand side of <type> e = { ... }
 814  * doesn't contain sufficient information to determine if the types match.
 815  */
 816 void
 817 _mesa_ast_set_aggregate_type(const glsl_type *type,
 818                              ast_expression *expr)
 819 {
 820    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 821    ai->constructor_type = type;
 822
 823    /* If the aggregate is an array, recursively set its elements' types. */
 824    if (type->is_array()) {
 825       /* Each array element has the type type->fields.array.
 826        *
 827        * E.g., if <type> if struct S[2] we want to set each element's type to
 828        * struct S.
 829        */
 830       for (exec_node *expr_node = ai->expressions.head;
 831            !expr_node->is_tail_sentinel();
 832            expr_node = expr_node->next) {
 833          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 834                                                link);
 835
 836          if (expr->oper == ast_aggregate)
 837             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 838       }
 839
 840    /* If the aggregate is a struct, recursively set its fields' types. */
 841    } else if (type->is_record()) {
 842       exec_node *expr_node = ai->expressions.head;
 843
 844       /* Iterate through the struct's fields. */
 845       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 846            i++, expr_node = expr_node->next) {
 847          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 848                                                link);
 849
 850          if (expr->oper == ast_aggregate) {
 851             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 852          }
 853       }
 854    /* If the aggregate is a matrix, set its columns' types. */
 855    } else if (type->is_matrix()) {
 856       for (exec_node *expr_node = ai->expressions.head;
 857            !expr_node->is_tail_sentinel();
 858            expr_node = expr_node->next) {
 859          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 860                                                link);
 861
 862          if (expr->oper == ast_aggregate)
 863             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 864       }
 865    }
 866 }
 867
 868 void
 869 _mesa_ast_process_interface_block(YYLTYPE *locp,
 870                                   _mesa_glsl_parse_state *state,
 871                                   ast_interface_block *const block,
 872                                   const struct ast_type_qualifier &q)
 873 {
 874    if (q.flags.q.buffer) {
 875       if (!state->has_shader_storage_buffer_objects()) {
 876          _mesa_glsl_error(locp, state,
 877                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 878                           "required for defining shader storage blocks");
 879       } else if (state->ARB_shader_storage_buffer_object_warn) {
 880          _mesa_glsl_warning(locp, state,
 881                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 882                             "required for defining shader storage blocks");
 883       }
 884    } else if (q.flags.q.uniform) {
 885       if (!state->has_uniform_buffer_objects()) {
 886          _mesa_glsl_error(locp, state,
 887                           "#version 140 / GL_ARB_uniform_buffer_object "
 888                           "required for defining uniform blocks");
 889       } else if (state->ARB_uniform_buffer_object_warn) {
 890          _mesa_glsl_warning(locp, state,
 891                             "#version 140 / GL_ARB_uniform_buffer_object "
 892                             "required for defining uniform blocks");
 893       }
 894    } else {
 895       if (state->es_shader || state->language_version < 150) {
 896          _mesa_glsl_error(locp, state,
 897                           "#version 150 required for using "
 898                           "interface blocks");
 899       }
 900    }
 901
 902    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
 903     * "It is illegal to have an input block in a vertex shader
 904     *  or an output block in a fragment shader"
 905     */
 906    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
 907       _mesa_glsl_error(locp, state,
 908                        "`in' interface block is not allowed for "
 909                        "a vertex shader");
 910    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
 911       _mesa_glsl_error(locp, state,
 912                        "`out' interface block is not allowed for "
 913                        "a fragment shader");
 914    }
 915
 916    /* Since block arrays require names, and both features are added in
 917     * the same language versions, we don't have to explicitly
 918     * version-check both things.
 919     */
 920    if (block->instance_name != NULL) {
 921       state->check_version(150, 300, locp, "interface blocks with "
 922                            "an instance name are not allowed");
 923    }
 924
 925    uint64_t interface_type_mask;
 926    struct ast_type_qualifier temp_type_qualifier;
 927
 928    /* Get a bitmask containing only the in/out/uniform/buffer
 929     * flags, allowing us to ignore other irrelevant flags like
 930     * interpolation qualifiers.
 931     */
 932    temp_type_qualifier.flags.i = 0;
 933    temp_type_qualifier.flags.q.uniform = true;
 934    temp_type_qualifier.flags.q.in = true;
 935    temp_type_qualifier.flags.q.out = true;
 936    temp_type_qualifier.flags.q.buffer = true;
 937    interface_type_mask = temp_type_qualifier.flags.i;
 938
 939    /* Get the block's interface qualifier.  The interface_qualifier
 940     * production rule guarantees that only one bit will be set (and
 941     * it will be in/out/uniform).
 942     */
 943    uint64_t block_interface_qualifier = q.flags.i;
 944
 945    block->layout.flags.i |= block_interface_qualifier;
 946
 947    if (state->stage == MESA_SHADER_GEOMETRY &&
 948        state->has_explicit_attrib_stream() &&
 949        block->layout.flags.q.out) {
 950       /* Assign global layout's stream value. */
 951       block->layout.flags.q.stream = 1;
 952       block->layout.flags.q.explicit_stream = 0;
 953       block->layout.stream = state->out_qualifier->stream;
 954    }
 955
 956    if (state->has_enhanced_layouts() && block->layout.flags.q.out) {
 957       /* Assign global layout's xfb_buffer value. */
 958       block->layout.flags.q.xfb_buffer = 1;
 959       block->layout.flags.q.explicit_xfb_buffer = 0;
 960       block->layout.xfb_buffer = state->out_qualifier->xfb_buffer;
 961    }
 962
 963    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
 964       ast_type_qualifier& qualifier = member->type->qualifier;
 965       if ((qualifier.flags.i & interface_type_mask) == 0) {
 966          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
 967           * "If no optional qualifier is used in a member declaration, the
 968           *  qualifier of the variable is just in, out, or uniform as declared
 969           *  by interface-qualifier."
 970           */
 971          qualifier.flags.i |= block_interface_qualifier;
 972       } else if ((qualifier.flags.i & interface_type_mask) !=
 973                  block_interface_qualifier) {
 974          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
 975           * "If optional qualifiers are used, they can include interpolation
 976           *  and storage qualifiers and they must declare an input, output,
 977           *  or uniform variable consistent with the interface qualifier of
 978           *  the block."
 979           */
 980          _mesa_glsl_error(locp, state,
 981                           "uniform/in/out qualifier on "
 982                           "interface block member does not match "
 983                           "the interface block");
 984       }
 985
 986       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
 987          _mesa_glsl_error(locp, state,
 988                           "invariant qualifiers can be used only "
 989                           "in interface block members for shader "
 990                           "inputs or outputs");
 991    }
 992 }
 993
 994 void
 995 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
 996 {
 997    if (q->flags.q.subroutine)
 998       printf("subroutine ");
 999
1000    if (q->flags.q.subroutine_def) {
1001       printf("subroutine (");
1002       q->subroutine_list->print();
1003       printf(")");
1004    }
1005
1006    if (q->flags.q.constant)
1007       printf("const ");
1008
1009    if (q->flags.q.invariant)
1010       printf("invariant ");
1011
1012    if (q->flags.q.attribute)
1013       printf("attribute ");
1014
1015    if (q->flags.q.varying)
1016       printf("varying ");
1017
1018    if (q->flags.q.in && q->flags.q.out)
1019       printf("inout ");
1020    else {
1021       if (q->flags.q.in)
1022          printf("in ");
1023
1024       if (q->flags.q.out)
1025          printf("out ");
1026    }
1027
1028    if (q->flags.q.centroid)
1029       printf("centroid ");
1030    if (q->flags.q.sample)
1031       printf("sample ");
1032    if (q->flags.q.patch)
1033       printf("patch ");
1034    if (q->flags.q.uniform)
1035       printf("uniform ");
1036    if (q->flags.q.buffer)
1037       printf("buffer ");
1038    if (q->flags.q.smooth)
1039       printf("smooth ");
1040    if (q->flags.q.flat)
1041       printf("flat ");
1042    if (q->flags.q.noperspective)
1043       printf("noperspective ");
1044 }
1045
1046
1047 void
1048 ast_node::print(void) const
1049 {
1050    printf("unhandled node ");
1051 }
1052
1053
1054 ast_node::ast_node(void)
1055 {
1056    this->location.source = 0;
1057    this->location.first_line = 0;
1058    this->location.first_column = 0;
1059    this->location.last_line = 0;
1060    this->location.last_column = 0;
1061 }
1062
1063
1064 static void
1065 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1066 {
1067    if (array_specifier)
1068       array_specifier->print();
1069 }
1070
1071
1072 void
1073 ast_compound_statement::print(void) const
1074 {
1075    printf("{\n");
1076
1077    foreach_list_typed(ast_node, ast, link, &this->statements) {
1078       ast->print();
1079    }
1080
1081    printf("}\n");
1082 }
1083
1084
1085 ast_compound_statement::ast_compound_statement(int new_scope,
1086                                                ast_node *statements)
1087 {
1088    this->new_scope = new_scope;
1089
1090    if (statements != NULL) {
1091       this->statements.push_degenerate_list_at_head(&statements->link);
1092    }
1093 }
1094
1095
1096 void
1097 ast_expression::print(void) const
1098 {
1099    switch (oper) {
1100    case ast_assign:
1101    case ast_mul_assign:
1102    case ast_div_assign:
1103    case ast_mod_assign:
1104    case ast_add_assign:
1105    case ast_sub_assign:
1106    case ast_ls_assign:
1107    case ast_rs_assign:
1108    case ast_and_assign:
1109    case ast_xor_assign:
1110    case ast_or_assign:
1111       subexpressions[0]->print();
1112       printf("%s ", operator_string(oper));
1113       subexpressions[1]->print();
1114       break;
1115
1116    case ast_field_selection:
1117       subexpressions[0]->print();
1118       printf(". %s ", primary_expression.identifier);
1119       break;
1120
1121    case ast_plus:
1122    case ast_neg:
1123    case ast_bit_not:
1124    case ast_logic_not:
1125    case ast_pre_inc:
1126    case ast_pre_dec:
1127       printf("%s ", operator_string(oper));
1128       subexpressions[0]->print();
1129       break;
1130
1131    case ast_post_inc:
1132    case ast_post_dec:
1133       subexpressions[0]->print();
1134       printf("%s ", operator_string(oper));
1135       break;
1136
1137    case ast_conditional:
1138       subexpressions[0]->print();
1139       printf("? ");
1140       subexpressions[1]->print();
1141       printf(": ");
1142       subexpressions[2]->print();
1143       break;
1144
1145    case ast_array_index:
1146       subexpressions[0]->print();
1147       printf("[ ");
1148       subexpressions[1]->print();
1149       printf("] ");
1150       break;
1151
1152    case ast_function_call: {
1153       subexpressions[0]->print();
1154       printf("( ");
1155
1156       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1157          if (&ast->link != this->expressions.get_head())
1158             printf(", ");
1159
1160          ast->print();
1161       }
1162
1163       printf(") ");
1164       break;
1165    }
1166
1167    case ast_identifier:
1168       printf("%s ", primary_expression.identifier);
1169       break;
1170
1171    case ast_int_constant:
1172       printf("%d ", primary_expression.int_constant);
1173       break;
1174
1175    case ast_uint_constant:
1176       printf("%u ", primary_expression.uint_constant);
1177       break;
1178
1179    case ast_float_constant:
1180       printf("%f ", primary_expression.float_constant);
1181       break;
1182
1183    case ast_double_constant:
1184       printf("%f ", primary_expression.double_constant);
1185       break;
1186
1187    case ast_bool_constant:
1188       printf("%s ",
1189              primary_expression.bool_constant
1190              ? "true" : "false");
1191       break;
1192
1193    case ast_sequence: {
1194       printf("( ");
1195       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1196          if (&ast->link != this->expressions.get_head())
1197             printf(", ");
1198
1199          ast->print();
1200       }
1201       printf(") ");
1202       break;
1203    }
1204
1205    case ast_aggregate: {
1206       printf("{ ");
1207       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1208          if (&ast->link != this->expressions.get_head())
1209             printf(", ");
1210
1211          ast->print();
1212       }
1213       printf("} ");
1214       break;
1215    }
1216
1217    default:
1218       assert(0);
1219       break;
1220    }
1221 }
1222
1223 ast_expression::ast_expression(int oper,
1224                                ast_expression *ex0,
1225                                ast_expression *ex1,
1226                                ast_expression *ex2) :
1227    primary_expression()
1228 {
1229    this->oper = ast_operators(oper);
1230    this->subexpressions[0] = ex0;
1231    this->subexpressions[1] = ex1;
1232    this->subexpressions[2] = ex2;
1233    this->non_lvalue_description = NULL;
1234    this->is_lhs = false;
1235 }
1236
1237
1238 void
1239 ast_expression_statement::print(void) const
1240 {
1241    if (expression)
1242       expression->print();
1243
1244    printf("; ");
1245 }
1246
1247
1248 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1249    expression(ex)
1250 {
1251    /* empty */
1252 }
1253
1254
1255 void
1256 ast_function::print(void) const
1257 {
1258    return_type->print();
1259    printf(" %s (", identifier);
1260
1261    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1262       ast->print();
1263    }
1264
1265    printf(")");
1266 }
1267
1268
1269 ast_function::ast_function(void)
1270    : return_type(NULL), identifier(NULL), is_definition(false),
1271      signature(NULL)
1272 {
1273    /* empty */
1274 }
1275
1276
1277 void
1278 ast_fully_specified_type::print(void) const
1279 {
1280    _mesa_ast_type_qualifier_print(& qualifier);
1281    specifier->print();
1282 }
1283
1284
1285 void
1286 ast_parameter_declarator::print(void) const
1287 {
1288    type->print();
1289    if (identifier)
1290       printf("%s ", identifier);
1291    ast_opt_array_dimensions_print(array_specifier);
1292 }
1293
1294
1295 void
1296 ast_function_definition::print(void) const
1297 {
1298    prototype->print();
1299    body->print();
1300 }
1301
1302
1303 void
1304 ast_declaration::print(void) const
1305 {
1306    printf("%s ", identifier);
1307    ast_opt_array_dimensions_print(array_specifier);
1308
1309    if (initializer) {
1310       printf("= ");
1311       initializer->print();
1312    }
1313 }
1314
1315
1316 ast_declaration::ast_declaration(const char *identifier,
1317                                  ast_array_specifier *array_specifier,
1318                                  ast_expression *initializer)
1319 {
1320    this->identifier = identifier;
1321    this->array_specifier = array_specifier;
1322    this->initializer = initializer;
1323 }
1324
1325
1326 void
1327 ast_declarator_list::print(void) const
1328 {
1329    assert(type || invariant);
1330
1331    if (type)
1332       type->print();
1333    else if (invariant)
1334       printf("invariant ");
1335    else
1336       printf("precise ");
1337
1338    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1339       if (&ast->link != this->declarations.get_head())
1340          printf(", ");
1341
1342       ast->print();
1343    }
1344
1345    printf("; ");
1346 }
1347
1348
1349 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1350 {
1351    this->type = type;
1352    this->invariant = false;
1353    this->precise = false;
1354 }
1355
1356 void
1357 ast_jump_statement::print(void) const
1358 {
1359    switch (mode) {
1360    case ast_continue:
1361       printf("continue; ");
1362       break;
1363    case ast_break:
1364       printf("break; ");
1365       break;
1366    case ast_return:
1367       printf("return ");
1368       if (opt_return_value)
1369          opt_return_value->print();
1370
1371       printf("; ");
1372       break;
1373    case ast_discard:
1374       printf("discard; ");
1375       break;
1376    }
1377 }
1378
1379
1380 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1381    : opt_return_value(NULL)
1382 {
1383    this->mode = ast_jump_modes(mode);
1384
1385    if (mode == ast_return)
1386       opt_return_value = return_value;
1387 }
1388
1389
1390 void
1391 ast_selection_statement::print(void) const
1392 {
1393    printf("if ( ");
1394    condition->print();
1395    printf(") ");
1396
1397    then_statement->print();
1398
1399    if (else_statement) {
1400       printf("else ");
1401       else_statement->print();
1402    }
1403 }
1404
1405
1406 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1407                                                  ast_node *then_statement,
1408                                                  ast_node *else_statement)
1409 {
1410    this->condition = condition;
1411    this->then_statement = then_statement;
1412    this->else_statement = else_statement;
1413 }
1414
1415
1416 void
1417 ast_switch_statement::print(void) const
1418 {
1419    printf("switch ( ");
1420    test_expression->print();
1421    printf(") ");
1422
1423    body->print();
1424 }
1425
1426
1427 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1428                                            ast_node *body)
1429 {
1430    this->test_expression = test_expression;
1431    this->body = body;
1432 }
1433
1434
1435 void
1436 ast_switch_body::print(void) const
1437 {
1438    printf("{\n");
1439    if (stmts != NULL) {
1440       stmts->print();
1441    }
1442    printf("}\n");
1443 }
1444
1445
1446 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1447 {
1448    this->stmts = stmts;
1449 }
1450
1451
1452 void ast_case_label::print(void) const
1453 {
1454    if (test_value != NULL) {
1455       printf("case ");
1456       test_value->print();
1457       printf(": ");
1458    } else {
1459       printf("default: ");
1460    }
1461 }
1462
1463
1464 ast_case_label::ast_case_label(ast_expression *test_value)
1465 {
1466    this->test_value = test_value;
1467 }
1468
1469
1470 void ast_case_label_list::print(void) const
1471 {
1472    foreach_list_typed(ast_node, ast, link, & this->labels) {
1473       ast->print();
1474    }
1475    printf("\n");
1476 }
1477
1478
1479 ast_case_label_list::ast_case_label_list(void)
1480 {
1481 }
1482
1483
1484 void ast_case_statement::print(void) const
1485 {
1486    labels->print();
1487    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1488       ast->print();
1489       printf("\n");
1490    }
1491 }
1492
1493
1494 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1495 {
1496    this->labels = labels;
1497 }
1498
1499
1500 void ast_case_statement_list::print(void) const
1501 {
1502    foreach_list_typed(ast_node, ast, link, & this->cases) {
1503       ast->print();
1504    }
1505 }
1506
1507
1508 ast_case_statement_list::ast_case_statement_list(void)
1509 {
1510 }
1511
1512
1513 void
1514 ast_iteration_statement::print(void) const
1515 {
1516    switch (mode) {
1517    case ast_for:
1518       printf("for( ");
1519       if (init_statement)
1520          init_statement->print();
1521       printf("; ");
1522
1523       if (condition)
1524          condition->print();
1525       printf("; ");
1526
1527       if (rest_expression)
1528          rest_expression->print();
1529       printf(") ");
1530
1531       body->print();
1532       break;
1533
1534    case ast_while:
1535       printf("while ( ");
1536       if (condition)
1537          condition->print();
1538       printf(") ");
1539       body->print();
1540       break;
1541
1542    case ast_do_while:
1543       printf("do ");
1544       body->print();
1545       printf("while ( ");
1546       if (condition)
1547          condition->print();
1548       printf("); ");
1549       break;
1550    }
1551 }
1552
1553
1554 ast_iteration_statement::ast_iteration_statement(int mode,
1555                                                  ast_node *init,
1556                                                  ast_node *condition,
1557                                                  ast_expression *rest_expression,
1558                                                  ast_node *body)
1559 {
1560    this->mode = ast_iteration_modes(mode);
1561    this->init_statement = init;
1562    this->condition = condition;
1563    this->rest_expression = rest_expression;
1564    this->body = body;
1565 }
1566
1567
1568 void
1569 ast_struct_specifier::print(void) const
1570 {
1571    printf("struct %s { ", name);
1572    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1573       ast->print();
1574    }
1575    printf("} ");
1576 }
1577
1578
1579 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1580                                            ast_declarator_list *declarator_list)
1581 {
1582    if (identifier == NULL) {
1583       static mtx_t mutex = _MTX_INITIALIZER_NP;
1584       static unsigned anon_count = 1;
1585       unsigned count;
1586
1587       mtx_lock(&mutex);
1588       count = anon_count++;
1589       mtx_unlock(&mutex);
1590
1591       identifier = ralloc_asprintf(this, "#anon_struct_%04x", count);
1592    }
1593    name = identifier;
1594    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1595    is_declaration = true;
1596 }
1597
1598 void ast_subroutine_list::print(void) const
1599 {
1600    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1601       if (&ast->link != this->declarations.get_head())
1602          printf(", ");
1603       ast->print();
1604    }
1605 }
1606
1607 static void
1608 set_shader_inout_layout(struct gl_shader *shader,
1609                      struct _mesa_glsl_parse_state *state)
1610 {
1611    /* Should have been prevented by the parser. */
1612    if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1613        shader->Stage == MESA_SHADER_VERTEX) {
1614       assert(!state->in_qualifier->flags.i);
1615    } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1616               shader->Stage != MESA_SHADER_TESS_EVAL) {
1617       assert(!state->in_qualifier->flags.i);
1618    }
1619
1620    if (shader->Stage != MESA_SHADER_COMPUTE) {
1621       /* Should have been prevented by the parser. */
1622       assert(!state->cs_input_local_size_specified);
1623    }
1624
1625    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1626       /* Should have been prevented by the parser. */
1627       assert(!state->fs_uses_gl_fragcoord);
1628       assert(!state->fs_redeclares_gl_fragcoord);
1629       assert(!state->fs_pixel_center_integer);
1630       assert(!state->fs_origin_upper_left);
1631       assert(!state->fs_early_fragment_tests);
1632    }
1633
1634    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1635       if (state->out_qualifier->out_xfb_stride[i]) {
1636          unsigned xfb_stride;
1637          if (state->out_qualifier->out_xfb_stride[i]->
1638                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1639                 true)) {
1640             shader->TransformFeedback.BufferStride[i] = xfb_stride;
1641          }
1642       }
1643    }
1644
1645    switch (shader->Stage) {
1646    case MESA_SHADER_TESS_CTRL:
1647       shader->TessCtrl.VerticesOut = 0;
1648       if (state->tcs_output_vertices_specified) {
1649          unsigned vertices;
1650          if (state->out_qualifier->vertices->
1651                process_qualifier_constant(state, "vertices", &vertices,
1652                                           false)) {
1653
1654             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1655             if (vertices > state->Const.MaxPatchVertices) {
1656                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1657                                 "GL_MAX_PATCH_VERTICES", vertices);
1658             }
1659             shader->TessCtrl.VerticesOut = vertices;
1660          }
1661       }
1662       break;
1663    case MESA_SHADER_TESS_EVAL:
1664       shader->TessEval.PrimitiveMode = PRIM_UNKNOWN;
1665       if (state->in_qualifier->flags.q.prim_type)
1666          shader->TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1667
1668       shader->TessEval.Spacing = 0;
1669       if (state->in_qualifier->flags.q.vertex_spacing)
1670          shader->TessEval.Spacing = state->in_qualifier->vertex_spacing;
1671
1672       shader->TessEval.VertexOrder = 0;
1673       if (state->in_qualifier->flags.q.ordering)
1674          shader->TessEval.VertexOrder = state->in_qualifier->ordering;
1675
1676       shader->TessEval.PointMode = -1;
1677       if (state->in_qualifier->flags.q.point_mode)
1678          shader->TessEval.PointMode = state->in_qualifier->point_mode;
1679       break;
1680    case MESA_SHADER_GEOMETRY:
1681       shader->Geom.VerticesOut = 0;
1682       if (state->out_qualifier->flags.q.max_vertices) {
1683          unsigned qual_max_vertices;
1684          if (state->out_qualifier->max_vertices->
1685                process_qualifier_constant(state, "max_vertices",
1686                                           &qual_max_vertices, true)) {
1687
1688             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1689                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1690                _mesa_glsl_error(&loc, state,
1691                                 "maximum output vertices (%d) exceeds "
1692                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1693                                 qual_max_vertices);
1694             }
1695             shader->Geom.VerticesOut = qual_max_vertices;
1696          }
1697       }
1698
1699       if (state->gs_input_prim_type_specified) {
1700          shader->Geom.InputType = state->in_qualifier->prim_type;
1701       } else {
1702          shader->Geom.InputType = PRIM_UNKNOWN;
1703       }
1704
1705       if (state->out_qualifier->flags.q.prim_type) {
1706          shader->Geom.OutputType = state->out_qualifier->prim_type;
1707       } else {
1708          shader->Geom.OutputType = PRIM_UNKNOWN;
1709       }
1710
1711       shader->Geom.Invocations = 0;
1712       if (state->in_qualifier->flags.q.invocations) {
1713          unsigned invocations;
1714          if (state->in_qualifier->invocations->
1715                process_qualifier_constant(state, "invocations",
1716                                           &invocations, false)) {
1717
1718             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1719             if (invocations > MAX_GEOMETRY_SHADER_INVOCATIONS) {
1720                _mesa_glsl_error(&loc, state,
1721                                 "invocations (%d) exceeds "
1722                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1723                                 invocations);
1724             }
1725             shader->Geom.Invocations = invocations;
1726          }
1727       }
1728       break;
1729
1730    case MESA_SHADER_COMPUTE:
1731       if (state->cs_input_local_size_specified) {
1732          for (int i = 0; i < 3; i++)
1733             shader->Comp.LocalSize[i] = state->cs_input_local_size[i];
1734       } else {
1735          for (int i = 0; i < 3; i++)
1736             shader->Comp.LocalSize[i] = 0;
1737       }
1738       break;
1739
1740    case MESA_SHADER_FRAGMENT:
1741       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1742       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1743       shader->pixel_center_integer = state->fs_pixel_center_integer;
1744       shader->origin_upper_left = state->fs_origin_upper_left;
1745       shader->ARB_fragment_coord_conventions_enable =
1746          state->ARB_fragment_coord_conventions_enable;
1747       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1748       break;
1749
1750    default:
1751       /* Nothing to do. */
1752       break;
1753    }
1754 }
1755
1756 extern "C" {
1757
1758 void
1759 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
1760                           bool dump_ast, bool dump_hir)
1761 {
1762    struct _mesa_glsl_parse_state *state =
1763       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
1764    const char *source = shader->Source;
1765
1766    if (ctx->Const.GenerateTemporaryNames)
1767       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
1768                               false, true);
1769
1770    state->error = glcpp_preprocess(state, &source, &state->info_log,
1771                              &ctx->Extensions, ctx);
1772
1773    if (!state->error) {
1774      _mesa_glsl_lexer_ctor(state, source);
1775      _mesa_glsl_parse(state);
1776      _mesa_glsl_lexer_dtor(state);
1777    }
1778
1779    if (dump_ast) {
1780       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
1781          ast->print();
1782       }
1783       printf("\n\n");
1784    }
1785
1786    ralloc_free(shader->ir);
1787    shader->ir = new(shader) exec_list;
1788    if (!state->error && !state->translation_unit.is_empty())
1789       _mesa_ast_to_hir(shader->ir, state);
1790
1791    if (!state->error) {
1792       validate_ir_tree(shader->ir);
1793
1794       /* Print out the unoptimized IR. */
1795       if (dump_hir) {
1796          _mesa_print_ir(stdout, shader->ir, state);
1797       }
1798    }
1799
1800
1801    if (!state->error && !shader->ir->is_empty()) {
1802       struct gl_shader_compiler_options *options =
1803          &ctx->Const.ShaderCompilerOptions[shader->Stage];
1804
1805       lower_subroutine(shader->ir, state);
1806       /* Do some optimization at compile time to reduce shader IR size
1807        * and reduce later work if the same shader is linked multiple times
1808        */
1809       while (do_common_optimization(shader->ir, false, false, options,
1810                                     ctx->Const.NativeIntegers))
1811          ;
1812
1813       validate_ir_tree(shader->ir);
1814
1815       enum ir_variable_mode other;
1816       switch (shader->Stage) {
1817       case MESA_SHADER_VERTEX:
1818          other = ir_var_shader_in;
1819          break;
1820       case MESA_SHADER_FRAGMENT:
1821          other = ir_var_shader_out;
1822          break;
1823       default:
1824          /* Something invalid to ensure optimize_dead_builtin_uniforms
1825           * doesn't remove anything other than uniforms or constants.
1826           */
1827          other = ir_var_mode_count;
1828          break;
1829       }
1830
1831       optimize_dead_builtin_variables(shader->ir, other);
1832
1833       validate_ir_tree(shader->ir);
1834    }
1835
1836    if (shader->InfoLog)
1837       ralloc_free(shader->InfoLog);
1838
1839    if (!state->error)
1840       set_shader_inout_layout(shader, state);
1841
1842    shader->symbols = new(shader->ir) glsl_symbol_table;
1843    shader->CompileStatus = !state->error;
1844    shader->InfoLog = state->info_log;
1845    shader->Version = state->language_version;
1846    shader->IsES = state->es_shader;
1847    shader->uses_builtin_functions = state->uses_builtin_functions;
1848
1849    /* Retain any live IR, but trash the rest. */
1850    reparent_ir(shader->ir, shader->ir);
1851
1852    /* Destroy the symbol table.  Create a new symbol table that contains only
1853     * the variables and functions that still exist in the IR.  The symbol
1854     * table will be used later during linking.
1855     *
1856     * There must NOT be any freed objects still referenced by the symbol
1857     * table.  That could cause the linker to dereference freed memory.
1858     *
1859     * We don't have to worry about types or interface-types here because those
1860     * are fly-weights that are looked up by glsl_type.
1861     */
1862    foreach_in_list (ir_instruction, ir, shader->ir) {
1863       switch (ir->ir_type) {
1864       case ir_type_function:
1865          shader->symbols->add_function((ir_function *) ir);
1866          break;
1867       case ir_type_variable: {
1868          ir_variable *const var = (ir_variable *) ir;
1869
1870          if (var->data.mode != ir_var_temporary)
1871             shader->symbols->add_variable(var);
1872          break;
1873       }
1874       default:
1875          break;
1876       }
1877    }
1878
1879    _mesa_glsl_initialize_derived_variables(shader);
1880
1881    delete state->symbols;
1882    ralloc_free(state);
1883 }
1884
1885 } /* extern "C" */
1886 /**
1887  * Do the set of common optimizations passes
1888  *
1889  * \param ir                          List of instructions to be optimized
1890  * \param linked                      Is the shader linked?  This enables
1891  *                                    optimizations passes that remove code at
1892  *                                    global scope and could cause linking to
1893  *                                    fail.
1894  * \param uniform_locations_assigned  Have locations already been assigned for
1895  *                                    uniforms?  This prevents the declarations
1896  *                                    of unused uniforms from being removed.
1897  *                                    The setting of this flag only matters if
1898  *                                    \c linked is \c true.
1899  * \param max_unroll_iterations       Maximum number of loop iterations to be
1900  *                                    unrolled.  Setting to 0 disables loop
1901  *                                    unrolling.
1902  * \param options                     The driver's preferred shader options.
1903  */
1904 bool
1905 do_common_optimization(exec_list *ir, bool linked,
1906                        bool uniform_locations_assigned,
1907                        const struct gl_shader_compiler_options *options,
1908                        bool native_integers)
1909 {
1910    const bool debug = false;
1911    GLboolean progress = GL_FALSE;
1912
1913 #define OPT(PASS, ...) do {                                             \
1914       if (debug) {                                                      \
1915          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
1916          const bool opt_progress = PASS(__VA_ARGS__);                   \
1917          progress = opt_progress || progress;                           \
1918          if (opt_progress)                                              \
1919             _mesa_print_ir(stderr, ir, NULL);                           \
1920          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
1921                  #PASS, opt_progress ? "made" : "no");                  \
1922       } else {                                                          \
1923          progress = PASS(__VA_ARGS__) || progress;                      \
1924       }                                                                 \
1925    } while (false)
1926
1927    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
1928
1929    if (linked) {
1930       OPT(do_function_inlining, ir);
1931       OPT(do_dead_functions, ir);
1932       OPT(do_structure_splitting, ir);
1933    }
1934    propagate_invariance(ir);
1935    OPT(do_if_simplification, ir);
1936    OPT(opt_flatten_nested_if_blocks, ir);
1937    OPT(opt_conditional_discard, ir);
1938    OPT(do_copy_propagation, ir);
1939    OPT(do_copy_propagation_elements, ir);
1940
1941    if (options->OptimizeForAOS && !linked)
1942       OPT(opt_flip_matrices, ir);
1943
1944    if (linked && options->OptimizeForAOS) {
1945       OPT(do_vectorize, ir);
1946    }
1947
1948    if (linked)
1949       OPT(do_dead_code, ir, uniform_locations_assigned);
1950    else
1951       OPT(do_dead_code_unlinked, ir);
1952    OPT(do_dead_code_local, ir);
1953    OPT(do_tree_grafting, ir);
1954    OPT(do_constant_propagation, ir);
1955    if (linked)
1956       OPT(do_constant_variable, ir);
1957    else
1958       OPT(do_constant_variable_unlinked, ir);
1959    OPT(do_constant_folding, ir);
1960    OPT(do_minmax_prune, ir);
1961    OPT(do_rebalance_tree, ir);
1962    OPT(do_algebraic, ir, native_integers, options);
1963    OPT(do_lower_jumps, ir);
1964    OPT(do_vec_index_to_swizzle, ir);
1965    OPT(lower_vector_insert, ir, false);
1966    OPT(do_swizzle_swizzle, ir);
1967    OPT(do_noop_swizzle, ir);
1968
1969    OPT(optimize_split_arrays, ir, linked);
1970    OPT(optimize_redundant_jumps, ir);
1971
1972    loop_state *ls = analyze_loop_variables(ir);
1973    if (ls->loop_found) {
1974       OPT(set_loop_controls, ir, ls);
1975       OPT(unroll_loops, ir, ls, options);
1976    }
1977    delete ls;
1978
1979 #undef OPT
1980
1981    return progress;
1982 }
1983
1984 extern "C" {
1985
1986 /**
1987  * To be called at GL teardown time, this frees compiler datastructures.
1988  *
1989  * After calling this, any previously compiled shaders and shader
1990  * programs would be invalid.  So this should happen at approximately
1991  * program exit.
1992  */
1993 void
1994 _mesa_destroy_shader_compiler(void)
1995 {
1996    _mesa_destroy_shader_compiler_caches();
1997
1998    _mesa_glsl_release_types();
1999 }
2000
2001 /**
2002  * Releases compiler caches to trade off performance for memory.
2003  *
2004  * Intended to be used with glReleaseShaderCompiler().
2005  */
2006 void
2007 _mesa_destroy_shader_compiler_caches(void)
2008 {
2009    _mesa_glsl_release_builtin_functions();
2010 }
2011
2012 }