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_group_vote,            true,  false,     ARB_shader_group_vote),
 598    EXT(ARB_shader_image_load_store,      true,  false,     ARB_shader_image_load_store),
 599    EXT(ARB_shader_image_size,            true,  false,     ARB_shader_image_size),
 600    EXT(ARB_shader_precision,             true,  false,     ARB_shader_precision),
 601    EXT(ARB_shader_stencil_export,        true,  false,     ARB_shader_stencil_export),
 602    EXT(ARB_shader_storage_buffer_object, true,  true,      ARB_shader_storage_buffer_object),
 603    EXT(ARB_shader_subroutine,            true,  false,     ARB_shader_subroutine),
 604    EXT(ARB_shader_texture_image_samples, true,  false,     ARB_shader_texture_image_samples),
 605    EXT(ARB_shader_texture_lod,           true,  false,     ARB_shader_texture_lod),
 606    EXT(ARB_shading_language_420pack,     true,  false,     ARB_shading_language_420pack),
 607    EXT(ARB_shading_language_packing,     true,  false,     ARB_shading_language_packing),
 608    EXT(ARB_tessellation_shader,          true,  false,     ARB_tessellation_shader),
 609    EXT(ARB_texture_cube_map_array,       true,  false,     ARB_texture_cube_map_array),
 610    EXT(ARB_texture_gather,               true,  false,     ARB_texture_gather),
 611    EXT(ARB_texture_multisample,          true,  false,     ARB_texture_multisample),
 612    EXT(ARB_texture_query_levels,         true,  false,     ARB_texture_query_levels),
 613    EXT(ARB_texture_query_lod,            true,  false,     ARB_texture_query_lod),
 614    EXT(ARB_texture_rectangle,            true,  false,     dummy_true),
 615    EXT(ARB_uniform_buffer_object,        true,  false,     ARB_uniform_buffer_object),
 616    EXT(ARB_vertex_attrib_64bit,          true,  false,     ARB_vertex_attrib_64bit),
 617    EXT(ARB_viewport_array,               true,  false,     ARB_viewport_array),
 618
 619    /* KHR extensions go here, sorted alphabetically.
 620     */
 621
 622    /* OES extensions go here, sorted alphabetically.
 623     */
 624    EXT(OES_EGL_image_external,         false, true,      OES_EGL_image_external),
 625    EXT(OES_geometry_point_size,        false, true,      OES_geometry_shader),
 626    EXT(OES_geometry_shader,            false, true,      OES_geometry_shader),
 627    EXT(OES_gpu_shader5,                false, true,      ARB_gpu_shader5),
 628    EXT(OES_sample_variables,           false, true,      OES_sample_variables),
 629    EXT(OES_shader_image_atomic,        false, true,      ARB_shader_image_load_store),
 630    EXT(OES_shader_io_blocks,           false, true,      OES_shader_io_blocks),
 631    EXT(OES_shader_multisample_interpolation, false, true, OES_sample_variables),
 632    EXT(OES_standard_derivatives,       false, true,      OES_standard_derivatives),
 633    EXT(OES_texture_3D,                 false, true,      dummy_true),
 634    EXT(OES_texture_buffer,             false, true,      OES_texture_buffer),
 635    EXT(OES_texture_storage_multisample_2d_array, false, true, ARB_texture_multisample),
 636
 637    /* All other extensions go here, sorted alphabetically.
 638     */
 639    EXT(AMD_conservative_depth,         true,  false,     ARB_conservative_depth),
 640    EXT(AMD_shader_stencil_export,      true,  false,     ARB_shader_stencil_export),
 641    EXT(AMD_shader_trinary_minmax,      true,  false,     dummy_true),
 642    EXT(AMD_vertex_shader_layer,        true,  false,     AMD_vertex_shader_layer),
 643    EXT(AMD_vertex_shader_viewport_index, true,  false,   AMD_vertex_shader_viewport_index),
 644    EXT(EXT_blend_func_extended,        false,  true,     ARB_blend_func_extended),
 645    EXT(EXT_draw_buffers,               false,  true,     dummy_true),
 646    EXT(EXT_clip_cull_distance,         false, true,      ARB_cull_distance),
 647    EXT(EXT_gpu_shader5,                false, true,      ARB_gpu_shader5),
 648    EXT(EXT_separate_shader_objects,    false, true,      dummy_true),
 649    EXT(EXT_shader_integer_mix,         true,  true,      EXT_shader_integer_mix),
 650    EXT(EXT_shader_io_blocks,           false, true,      OES_shader_io_blocks),
 651    EXT(EXT_shader_samples_identical,   true,  true,      EXT_shader_samples_identical),
 652    EXT(EXT_texture_array,              true,  false,     EXT_texture_array),
 653    EXT(EXT_texture_buffer,             false, true,      OES_texture_buffer),
 654 };
 655
 656 #undef EXT
 657
 658
 659 /**
 660  * Determine whether a given extension is compatible with the target,
 661  * API, and extension information in the current parser state.
 662  */
 663 bool _mesa_glsl_extension::compatible_with_state(const _mesa_glsl_parse_state *
 664                                                  state) const
 665 {
 666    /* Check that this extension matches whether we are compiling
 667     * for desktop GL or GLES.
 668     */
 669    if (state->es_shader) {
 670       if (!this->avail_in_ES) return false;
 671    } else {
 672       if (!this->avail_in_GL) return false;
 673    }
 674
 675    /* Check that this extension is supported by the OpenGL
 676     * implementation.
 677     *
 678     * Note: the ->* operator indexes into state->extensions by the
 679     * offset this->supported_flag.  See
 680     * _mesa_glsl_extension::supported_flag for more info.
 681     */
 682    return state->extensions->*(this->supported_flag);
 683 }
 684
 685 /**
 686  * Set the appropriate flags in the parser state to establish the
 687  * given behavior for this extension.
 688  */
 689 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 690                                      ext_behavior behavior) const
 691 {
 692    /* Note: the ->* operator indexes into state by the
 693     * offsets this->enable_flag and this->warn_flag.  See
 694     * _mesa_glsl_extension::supported_flag for more info.
 695     */
 696    state->*(this->enable_flag) = (behavior != extension_disable);
 697    state->*(this->warn_flag)   = (behavior == extension_warn);
 698 }
 699
 700 /**
 701  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 702  * the name is not found, return NULL.
 703  */
 704 static const _mesa_glsl_extension *find_extension(const char *name)
 705 {
 706    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 707       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 708          return &_mesa_glsl_supported_extensions[i];
 709       }
 710    }
 711    return NULL;
 712 }
 713
 714
 715 bool
 716 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 717                              const char *behavior_string, YYLTYPE *behavior_locp,
 718                              _mesa_glsl_parse_state *state)
 719 {
 720    ext_behavior behavior;
 721    if (strcmp(behavior_string, "warn") == 0) {
 722       behavior = extension_warn;
 723    } else if (strcmp(behavior_string, "require") == 0) {
 724       behavior = extension_require;
 725    } else if (strcmp(behavior_string, "enable") == 0) {
 726       behavior = extension_enable;
 727    } else if (strcmp(behavior_string, "disable") == 0) {
 728       behavior = extension_disable;
 729    } else {
 730       _mesa_glsl_error(behavior_locp, state,
 731                        "unknown extension behavior `%s'",
 732                        behavior_string);
 733       return false;
 734    }
 735
 736    if (strcmp(name, "all") == 0) {
 737       if ((behavior == extension_enable) || (behavior == extension_require)) {
 738          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 739                           (behavior == extension_enable)
 740                           ? "enable" : "require");
 741          return false;
 742       } else {
 743          for (unsigned i = 0;
 744               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 745             const _mesa_glsl_extension *extension
 746                = &_mesa_glsl_supported_extensions[i];
 747             if (extension->compatible_with_state(state)) {
 748                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 749             }
 750          }
 751       }
 752    } else {
 753       const _mesa_glsl_extension *extension = find_extension(name);
 754       if (extension && extension->compatible_with_state(state)) {
 755          extension->set_flags(state, behavior);
 756       } else {
 757          static const char fmt[] = "extension `%s' unsupported in %s shader";
 758
 759          if (behavior == extension_require) {
 760             _mesa_glsl_error(name_locp, state, fmt,
 761                              name, _mesa_shader_stage_to_string(state->stage));
 762             return false;
 763          } else {
 764             _mesa_glsl_warning(name_locp, state, fmt,
 765                                name, _mesa_shader_stage_to_string(state->stage));
 766          }
 767       }
 768    }
 769
 770    return true;
 771 }
 772
 773
 774 /**
 775  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 776  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 777  * (process_array_constructor, et al) sufficient information to do type
 778  * checking.
 779  *
 780  * Operates on assignments involving an aggregate initializer. E.g.,
 781  *
 782  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 783  *
 784  * or more ridiculously,
 785  *
 786  * struct S {
 787  *     vec4 v[2];
 788  * };
 789  *
 790  * struct {
 791  *     S a[2], b;
 792  *     int c;
 793  * } aggregate = {
 794  *     {
 795  *         {
 796  *             {
 797  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 798  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 799  *             } // a[0].v
 800  *         }, // a[0]
 801  *         {
 802  *             {
 803  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 804  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 805  *             } // a[1].v
 806  *         } // a[1]
 807  *     }, // a
 808  *     {
 809  *         {
 810  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 811  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 812  *         } // b.v
 813  *     }, // b
 814  *     4 // c
 815  * };
 816  *
 817  * This pass is necessary because the right-hand side of <type> e = { ... }
 818  * doesn't contain sufficient information to determine if the types match.
 819  */
 820 void
 821 _mesa_ast_set_aggregate_type(const glsl_type *type,
 822                              ast_expression *expr)
 823 {
 824    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 825    ai->constructor_type = type;
 826
 827    /* If the aggregate is an array, recursively set its elements' types. */
 828    if (type->is_array()) {
 829       /* Each array element has the type type->fields.array.
 830        *
 831        * E.g., if <type> if struct S[2] we want to set each element's type to
 832        * struct S.
 833        */
 834       for (exec_node *expr_node = ai->expressions.head;
 835            !expr_node->is_tail_sentinel();
 836            expr_node = expr_node->next) {
 837          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 838                                                link);
 839
 840          if (expr->oper == ast_aggregate)
 841             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 842       }
 843
 844    /* If the aggregate is a struct, recursively set its fields' types. */
 845    } else if (type->is_record()) {
 846       exec_node *expr_node = ai->expressions.head;
 847
 848       /* Iterate through the struct's fields. */
 849       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 850            i++, expr_node = expr_node->next) {
 851          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 852                                                link);
 853
 854          if (expr->oper == ast_aggregate) {
 855             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 856          }
 857       }
 858    /* If the aggregate is a matrix, set its columns' types. */
 859    } else if (type->is_matrix()) {
 860       for (exec_node *expr_node = ai->expressions.head;
 861            !expr_node->is_tail_sentinel();
 862            expr_node = expr_node->next) {
 863          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 864                                                link);
 865
 866          if (expr->oper == ast_aggregate)
 867             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 868       }
 869    }
 870 }
 871
 872 void
 873 _mesa_ast_process_interface_block(YYLTYPE *locp,
 874                                   _mesa_glsl_parse_state *state,
 875                                   ast_interface_block *const block,
 876                                   const struct ast_type_qualifier &q)
 877 {
 878    if (q.flags.q.buffer) {
 879       if (!state->has_shader_storage_buffer_objects()) {
 880          _mesa_glsl_error(locp, state,
 881                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 882                           "required for defining shader storage blocks");
 883       } else if (state->ARB_shader_storage_buffer_object_warn) {
 884          _mesa_glsl_warning(locp, state,
 885                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 886                             "required for defining shader storage blocks");
 887       }
 888    } else if (q.flags.q.uniform) {
 889       if (!state->has_uniform_buffer_objects()) {
 890          _mesa_glsl_error(locp, state,
 891                           "#version 140 / GL_ARB_uniform_buffer_object "
 892                           "required for defining uniform blocks");
 893       } else if (state->ARB_uniform_buffer_object_warn) {
 894          _mesa_glsl_warning(locp, state,
 895                             "#version 140 / GL_ARB_uniform_buffer_object "
 896                             "required for defining uniform blocks");
 897       }
 898    } else {
 899       if (!state->has_shader_io_blocks()) {
 900          if (state->es_shader) {
 901             _mesa_glsl_error(locp, state,
 902                              "GL_OES_shader_io_blocks or #version 320 "
 903                              "required for using interface blocks");
 904          } else {
 905             _mesa_glsl_error(locp, state,
 906                              "#version 150 required for using "
 907                              "interface blocks");
 908          }
 909       }
 910    }
 911
 912    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
 913     * "It is illegal to have an input block in a vertex shader
 914     *  or an output block in a fragment shader"
 915     */
 916    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
 917       _mesa_glsl_error(locp, state,
 918                        "`in' interface block is not allowed for "
 919                        "a vertex shader");
 920    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
 921       _mesa_glsl_error(locp, state,
 922                        "`out' interface block is not allowed for "
 923                        "a fragment shader");
 924    }
 925
 926    /* Since block arrays require names, and both features are added in
 927     * the same language versions, we don't have to explicitly
 928     * version-check both things.
 929     */
 930    if (block->instance_name != NULL) {
 931       state->check_version(150, 300, locp, "interface blocks with "
 932                            "an instance name are not allowed");
 933    }
 934
 935    uint64_t interface_type_mask;
 936    struct ast_type_qualifier temp_type_qualifier;
 937
 938    /* Get a bitmask containing only the in/out/uniform/buffer
 939     * flags, allowing us to ignore other irrelevant flags like
 940     * interpolation qualifiers.
 941     */
 942    temp_type_qualifier.flags.i = 0;
 943    temp_type_qualifier.flags.q.uniform = true;
 944    temp_type_qualifier.flags.q.in = true;
 945    temp_type_qualifier.flags.q.out = true;
 946    temp_type_qualifier.flags.q.buffer = true;
 947    interface_type_mask = temp_type_qualifier.flags.i;
 948
 949    /* Get the block's interface qualifier.  The interface_qualifier
 950     * production rule guarantees that only one bit will be set (and
 951     * it will be in/out/uniform).
 952     */
 953    uint64_t block_interface_qualifier = q.flags.i;
 954
 955    block->layout.flags.i |= block_interface_qualifier;
 956
 957    if (state->stage == MESA_SHADER_GEOMETRY &&
 958        state->has_explicit_attrib_stream() &&
 959        block->layout.flags.q.out) {
 960       /* Assign global layout's stream value. */
 961       block->layout.flags.q.stream = 1;
 962       block->layout.flags.q.explicit_stream = 0;
 963       block->layout.stream = state->out_qualifier->stream;
 964    }
 965
 966    if (state->has_enhanced_layouts() && block->layout.flags.q.out) {
 967       /* Assign global layout's xfb_buffer value. */
 968       block->layout.flags.q.xfb_buffer = 1;
 969       block->layout.flags.q.explicit_xfb_buffer = 0;
 970       block->layout.xfb_buffer = state->out_qualifier->xfb_buffer;
 971    }
 972
 973    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
 974       ast_type_qualifier& qualifier = member->type->qualifier;
 975       if ((qualifier.flags.i & interface_type_mask) == 0) {
 976          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
 977           * "If no optional qualifier is used in a member declaration, the
 978           *  qualifier of the variable is just in, out, or uniform as declared
 979           *  by interface-qualifier."
 980           */
 981          qualifier.flags.i |= block_interface_qualifier;
 982       } else if ((qualifier.flags.i & interface_type_mask) !=
 983                  block_interface_qualifier) {
 984          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
 985           * "If optional qualifiers are used, they can include interpolation
 986           *  and storage qualifiers and they must declare an input, output,
 987           *  or uniform variable consistent with the interface qualifier of
 988           *  the block."
 989           */
 990          _mesa_glsl_error(locp, state,
 991                           "uniform/in/out qualifier on "
 992                           "interface block member does not match "
 993                           "the interface block");
 994       }
 995
 996       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
 997          _mesa_glsl_error(locp, state,
 998                           "invariant qualifiers can be used only "
 999                           "in interface block members for shader "
1000                           "inputs or outputs");
1001    }
1002 }
1003
1004 void
1005 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1006 {
1007    if (q->flags.q.subroutine)
1008       printf("subroutine ");
1009
1010    if (q->flags.q.subroutine_def) {
1011       printf("subroutine (");
1012       q->subroutine_list->print();
1013       printf(")");
1014    }
1015
1016    if (q->flags.q.constant)
1017       printf("const ");
1018
1019    if (q->flags.q.invariant)
1020       printf("invariant ");
1021
1022    if (q->flags.q.attribute)
1023       printf("attribute ");
1024
1025    if (q->flags.q.varying)
1026       printf("varying ");
1027
1028    if (q->flags.q.in && q->flags.q.out)
1029       printf("inout ");
1030    else {
1031       if (q->flags.q.in)
1032          printf("in ");
1033
1034       if (q->flags.q.out)
1035          printf("out ");
1036    }
1037
1038    if (q->flags.q.centroid)
1039       printf("centroid ");
1040    if (q->flags.q.sample)
1041       printf("sample ");
1042    if (q->flags.q.patch)
1043       printf("patch ");
1044    if (q->flags.q.uniform)
1045       printf("uniform ");
1046    if (q->flags.q.buffer)
1047       printf("buffer ");
1048    if (q->flags.q.smooth)
1049       printf("smooth ");
1050    if (q->flags.q.flat)
1051       printf("flat ");
1052    if (q->flags.q.noperspective)
1053       printf("noperspective ");
1054 }
1055
1056
1057 void
1058 ast_node::print(void) const
1059 {
1060    printf("unhandled node ");
1061 }
1062
1063
1064 ast_node::ast_node(void)
1065 {
1066    this->location.source = 0;
1067    this->location.first_line = 0;
1068    this->location.first_column = 0;
1069    this->location.last_line = 0;
1070    this->location.last_column = 0;
1071 }
1072
1073
1074 static void
1075 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1076 {
1077    if (array_specifier)
1078       array_specifier->print();
1079 }
1080
1081
1082 void
1083 ast_compound_statement::print(void) const
1084 {
1085    printf("{\n");
1086
1087    foreach_list_typed(ast_node, ast, link, &this->statements) {
1088       ast->print();
1089    }
1090
1091    printf("}\n");
1092 }
1093
1094
1095 ast_compound_statement::ast_compound_statement(int new_scope,
1096                                                ast_node *statements)
1097 {
1098    this->new_scope = new_scope;
1099
1100    if (statements != NULL) {
1101       this->statements.push_degenerate_list_at_head(&statements->link);
1102    }
1103 }
1104
1105
1106 void
1107 ast_expression::print(void) const
1108 {
1109    switch (oper) {
1110    case ast_assign:
1111    case ast_mul_assign:
1112    case ast_div_assign:
1113    case ast_mod_assign:
1114    case ast_add_assign:
1115    case ast_sub_assign:
1116    case ast_ls_assign:
1117    case ast_rs_assign:
1118    case ast_and_assign:
1119    case ast_xor_assign:
1120    case ast_or_assign:
1121       subexpressions[0]->print();
1122       printf("%s ", operator_string(oper));
1123       subexpressions[1]->print();
1124       break;
1125
1126    case ast_field_selection:
1127       subexpressions[0]->print();
1128       printf(". %s ", primary_expression.identifier);
1129       break;
1130
1131    case ast_plus:
1132    case ast_neg:
1133    case ast_bit_not:
1134    case ast_logic_not:
1135    case ast_pre_inc:
1136    case ast_pre_dec:
1137       printf("%s ", operator_string(oper));
1138       subexpressions[0]->print();
1139       break;
1140
1141    case ast_post_inc:
1142    case ast_post_dec:
1143       subexpressions[0]->print();
1144       printf("%s ", operator_string(oper));
1145       break;
1146
1147    case ast_conditional:
1148       subexpressions[0]->print();
1149       printf("? ");
1150       subexpressions[1]->print();
1151       printf(": ");
1152       subexpressions[2]->print();
1153       break;
1154
1155    case ast_array_index:
1156       subexpressions[0]->print();
1157       printf("[ ");
1158       subexpressions[1]->print();
1159       printf("] ");
1160       break;
1161
1162    case ast_function_call: {
1163       subexpressions[0]->print();
1164       printf("( ");
1165
1166       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1167          if (&ast->link != this->expressions.get_head())
1168             printf(", ");
1169
1170          ast->print();
1171       }
1172
1173       printf(") ");
1174       break;
1175    }
1176
1177    case ast_identifier:
1178       printf("%s ", primary_expression.identifier);
1179       break;
1180
1181    case ast_int_constant:
1182       printf("%d ", primary_expression.int_constant);
1183       break;
1184
1185    case ast_uint_constant:
1186       printf("%u ", primary_expression.uint_constant);
1187       break;
1188
1189    case ast_float_constant:
1190       printf("%f ", primary_expression.float_constant);
1191       break;
1192
1193    case ast_double_constant:
1194       printf("%f ", primary_expression.double_constant);
1195       break;
1196
1197    case ast_bool_constant:
1198       printf("%s ",
1199              primary_expression.bool_constant
1200              ? "true" : "false");
1201       break;
1202
1203    case ast_sequence: {
1204       printf("( ");
1205       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1206          if (&ast->link != this->expressions.get_head())
1207             printf(", ");
1208
1209          ast->print();
1210       }
1211       printf(") ");
1212       break;
1213    }
1214
1215    case ast_aggregate: {
1216       printf("{ ");
1217       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1218          if (&ast->link != this->expressions.get_head())
1219             printf(", ");
1220
1221          ast->print();
1222       }
1223       printf("} ");
1224       break;
1225    }
1226
1227    default:
1228       assert(0);
1229       break;
1230    }
1231 }
1232
1233 ast_expression::ast_expression(int oper,
1234                                ast_expression *ex0,
1235                                ast_expression *ex1,
1236                                ast_expression *ex2) :
1237    primary_expression()
1238 {
1239    this->oper = ast_operators(oper);
1240    this->subexpressions[0] = ex0;
1241    this->subexpressions[1] = ex1;
1242    this->subexpressions[2] = ex2;
1243    this->non_lvalue_description = NULL;
1244    this->is_lhs = false;
1245 }
1246
1247
1248 void
1249 ast_expression_statement::print(void) const
1250 {
1251    if (expression)
1252       expression->print();
1253
1254    printf("; ");
1255 }
1256
1257
1258 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1259    expression(ex)
1260 {
1261    /* empty */
1262 }
1263
1264
1265 void
1266 ast_function::print(void) const
1267 {
1268    return_type->print();
1269    printf(" %s (", identifier);
1270
1271    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1272       ast->print();
1273    }
1274
1275    printf(")");
1276 }
1277
1278
1279 ast_function::ast_function(void)
1280    : return_type(NULL), identifier(NULL), is_definition(false),
1281      signature(NULL)
1282 {
1283    /* empty */
1284 }
1285
1286
1287 void
1288 ast_fully_specified_type::print(void) const
1289 {
1290    _mesa_ast_type_qualifier_print(& qualifier);
1291    specifier->print();
1292 }
1293
1294
1295 void
1296 ast_parameter_declarator::print(void) const
1297 {
1298    type->print();
1299    if (identifier)
1300       printf("%s ", identifier);
1301    ast_opt_array_dimensions_print(array_specifier);
1302 }
1303
1304
1305 void
1306 ast_function_definition::print(void) const
1307 {
1308    prototype->print();
1309    body->print();
1310 }
1311
1312
1313 void
1314 ast_declaration::print(void) const
1315 {
1316    printf("%s ", identifier);
1317    ast_opt_array_dimensions_print(array_specifier);
1318
1319    if (initializer) {
1320       printf("= ");
1321       initializer->print();
1322    }
1323 }
1324
1325
1326 ast_declaration::ast_declaration(const char *identifier,
1327                                  ast_array_specifier *array_specifier,
1328                                  ast_expression *initializer)
1329 {
1330    this->identifier = identifier;
1331    this->array_specifier = array_specifier;
1332    this->initializer = initializer;
1333 }
1334
1335
1336 void
1337 ast_declarator_list::print(void) const
1338 {
1339    assert(type || invariant);
1340
1341    if (type)
1342       type->print();
1343    else if (invariant)
1344       printf("invariant ");
1345    else
1346       printf("precise ");
1347
1348    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1349       if (&ast->link != this->declarations.get_head())
1350          printf(", ");
1351
1352       ast->print();
1353    }
1354
1355    printf("; ");
1356 }
1357
1358
1359 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1360 {
1361    this->type = type;
1362    this->invariant = false;
1363    this->precise = false;
1364 }
1365
1366 void
1367 ast_jump_statement::print(void) const
1368 {
1369    switch (mode) {
1370    case ast_continue:
1371       printf("continue; ");
1372       break;
1373    case ast_break:
1374       printf("break; ");
1375       break;
1376    case ast_return:
1377       printf("return ");
1378       if (opt_return_value)
1379          opt_return_value->print();
1380
1381       printf("; ");
1382       break;
1383    case ast_discard:
1384       printf("discard; ");
1385       break;
1386    }
1387 }
1388
1389
1390 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1391    : opt_return_value(NULL)
1392 {
1393    this->mode = ast_jump_modes(mode);
1394
1395    if (mode == ast_return)
1396       opt_return_value = return_value;
1397 }
1398
1399
1400 void
1401 ast_selection_statement::print(void) const
1402 {
1403    printf("if ( ");
1404    condition->print();
1405    printf(") ");
1406
1407    then_statement->print();
1408
1409    if (else_statement) {
1410       printf("else ");
1411       else_statement->print();
1412    }
1413 }
1414
1415
1416 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1417                                                  ast_node *then_statement,
1418                                                  ast_node *else_statement)
1419 {
1420    this->condition = condition;
1421    this->then_statement = then_statement;
1422    this->else_statement = else_statement;
1423 }
1424
1425
1426 void
1427 ast_switch_statement::print(void) const
1428 {
1429    printf("switch ( ");
1430    test_expression->print();
1431    printf(") ");
1432
1433    body->print();
1434 }
1435
1436
1437 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1438                                            ast_node *body)
1439 {
1440    this->test_expression = test_expression;
1441    this->body = body;
1442 }
1443
1444
1445 void
1446 ast_switch_body::print(void) const
1447 {
1448    printf("{\n");
1449    if (stmts != NULL) {
1450       stmts->print();
1451    }
1452    printf("}\n");
1453 }
1454
1455
1456 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1457 {
1458    this->stmts = stmts;
1459 }
1460
1461
1462 void ast_case_label::print(void) const
1463 {
1464    if (test_value != NULL) {
1465       printf("case ");
1466       test_value->print();
1467       printf(": ");
1468    } else {
1469       printf("default: ");
1470    }
1471 }
1472
1473
1474 ast_case_label::ast_case_label(ast_expression *test_value)
1475 {
1476    this->test_value = test_value;
1477 }
1478
1479
1480 void ast_case_label_list::print(void) const
1481 {
1482    foreach_list_typed(ast_node, ast, link, & this->labels) {
1483       ast->print();
1484    }
1485    printf("\n");
1486 }
1487
1488
1489 ast_case_label_list::ast_case_label_list(void)
1490 {
1491 }
1492
1493
1494 void ast_case_statement::print(void) const
1495 {
1496    labels->print();
1497    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1498       ast->print();
1499       printf("\n");
1500    }
1501 }
1502
1503
1504 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1505 {
1506    this->labels = labels;
1507 }
1508
1509
1510 void ast_case_statement_list::print(void) const
1511 {
1512    foreach_list_typed(ast_node, ast, link, & this->cases) {
1513       ast->print();
1514    }
1515 }
1516
1517
1518 ast_case_statement_list::ast_case_statement_list(void)
1519 {
1520 }
1521
1522
1523 void
1524 ast_iteration_statement::print(void) const
1525 {
1526    switch (mode) {
1527    case ast_for:
1528       printf("for( ");
1529       if (init_statement)
1530          init_statement->print();
1531       printf("; ");
1532
1533       if (condition)
1534          condition->print();
1535       printf("; ");
1536
1537       if (rest_expression)
1538          rest_expression->print();
1539       printf(") ");
1540
1541       body->print();
1542       break;
1543
1544    case ast_while:
1545       printf("while ( ");
1546       if (condition)
1547          condition->print();
1548       printf(") ");
1549       body->print();
1550       break;
1551
1552    case ast_do_while:
1553       printf("do ");
1554       body->print();
1555       printf("while ( ");
1556       if (condition)
1557          condition->print();
1558       printf("); ");
1559       break;
1560    }
1561 }
1562
1563
1564 ast_iteration_statement::ast_iteration_statement(int mode,
1565                                                  ast_node *init,
1566                                                  ast_node *condition,
1567                                                  ast_expression *rest_expression,
1568                                                  ast_node *body)
1569 {
1570    this->mode = ast_iteration_modes(mode);
1571    this->init_statement = init;
1572    this->condition = condition;
1573    this->rest_expression = rest_expression;
1574    this->body = body;
1575 }
1576
1577
1578 void
1579 ast_struct_specifier::print(void) const
1580 {
1581    printf("struct %s { ", name);
1582    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1583       ast->print();
1584    }
1585    printf("} ");
1586 }
1587
1588
1589 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1590                                            ast_declarator_list *declarator_list)
1591 {
1592    if (identifier == NULL) {
1593       static mtx_t mutex = _MTX_INITIALIZER_NP;
1594       static unsigned anon_count = 1;
1595       unsigned count;
1596
1597       mtx_lock(&mutex);
1598       count = anon_count++;
1599       mtx_unlock(&mutex);
1600
1601       identifier = ralloc_asprintf(this, "#anon_struct_%04x", count);
1602    }
1603    name = identifier;
1604    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1605    is_declaration = true;
1606 }
1607
1608 void ast_subroutine_list::print(void) const
1609 {
1610    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1611       if (&ast->link != this->declarations.get_head())
1612          printf(", ");
1613       ast->print();
1614    }
1615 }
1616
1617 static void
1618 set_shader_inout_layout(struct gl_shader *shader,
1619                      struct _mesa_glsl_parse_state *state)
1620 {
1621    /* Should have been prevented by the parser. */
1622    if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1623        shader->Stage == MESA_SHADER_VERTEX) {
1624       assert(!state->in_qualifier->flags.i);
1625    } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1626               shader->Stage != MESA_SHADER_TESS_EVAL) {
1627       assert(!state->in_qualifier->flags.i);
1628    }
1629
1630    if (shader->Stage != MESA_SHADER_COMPUTE) {
1631       /* Should have been prevented by the parser. */
1632       assert(!state->cs_input_local_size_specified);
1633    }
1634
1635    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1636       /* Should have been prevented by the parser. */
1637       assert(!state->fs_uses_gl_fragcoord);
1638       assert(!state->fs_redeclares_gl_fragcoord);
1639       assert(!state->fs_pixel_center_integer);
1640       assert(!state->fs_origin_upper_left);
1641       assert(!state->fs_early_fragment_tests);
1642    }
1643
1644    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1645       if (state->out_qualifier->out_xfb_stride[i]) {
1646          unsigned xfb_stride;
1647          if (state->out_qualifier->out_xfb_stride[i]->
1648                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1649                 true)) {
1650             shader->TransformFeedback.BufferStride[i] = xfb_stride;
1651          }
1652       }
1653    }
1654
1655    switch (shader->Stage) {
1656    case MESA_SHADER_TESS_CTRL:
1657       shader->TessCtrl.VerticesOut = 0;
1658       if (state->tcs_output_vertices_specified) {
1659          unsigned vertices;
1660          if (state->out_qualifier->vertices->
1661                process_qualifier_constant(state, "vertices", &vertices,
1662                                           false)) {
1663
1664             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1665             if (vertices > state->Const.MaxPatchVertices) {
1666                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1667                                 "GL_MAX_PATCH_VERTICES", vertices);
1668             }
1669             shader->TessCtrl.VerticesOut = vertices;
1670          }
1671       }
1672       break;
1673    case MESA_SHADER_TESS_EVAL:
1674       shader->TessEval.PrimitiveMode = PRIM_UNKNOWN;
1675       if (state->in_qualifier->flags.q.prim_type)
1676          shader->TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1677
1678       shader->TessEval.Spacing = 0;
1679       if (state->in_qualifier->flags.q.vertex_spacing)
1680          shader->TessEval.Spacing = state->in_qualifier->vertex_spacing;
1681
1682       shader->TessEval.VertexOrder = 0;
1683       if (state->in_qualifier->flags.q.ordering)
1684          shader->TessEval.VertexOrder = state->in_qualifier->ordering;
1685
1686       shader->TessEval.PointMode = -1;
1687       if (state->in_qualifier->flags.q.point_mode)
1688          shader->TessEval.PointMode = state->in_qualifier->point_mode;
1689       break;
1690    case MESA_SHADER_GEOMETRY:
1691       shader->Geom.VerticesOut = -1;
1692       if (state->out_qualifier->flags.q.max_vertices) {
1693          unsigned qual_max_vertices;
1694          if (state->out_qualifier->max_vertices->
1695                process_qualifier_constant(state, "max_vertices",
1696                                           &qual_max_vertices, true, true)) {
1697
1698             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1699                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1700                _mesa_glsl_error(&loc, state,
1701                                 "maximum output vertices (%d) exceeds "
1702                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1703                                 qual_max_vertices);
1704             }
1705             shader->Geom.VerticesOut = qual_max_vertices;
1706          }
1707       }
1708
1709       if (state->gs_input_prim_type_specified) {
1710          shader->Geom.InputType = state->in_qualifier->prim_type;
1711       } else {
1712          shader->Geom.InputType = PRIM_UNKNOWN;
1713       }
1714
1715       if (state->out_qualifier->flags.q.prim_type) {
1716          shader->Geom.OutputType = state->out_qualifier->prim_type;
1717       } else {
1718          shader->Geom.OutputType = PRIM_UNKNOWN;
1719       }
1720
1721       shader->Geom.Invocations = 0;
1722       if (state->in_qualifier->flags.q.invocations) {
1723          unsigned invocations;
1724          if (state->in_qualifier->invocations->
1725                process_qualifier_constant(state, "invocations",
1726                                           &invocations, false)) {
1727
1728             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1729             if (invocations > MAX_GEOMETRY_SHADER_INVOCATIONS) {
1730                _mesa_glsl_error(&loc, state,
1731                                 "invocations (%d) exceeds "
1732                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1733                                 invocations);
1734             }
1735             shader->Geom.Invocations = invocations;
1736          }
1737       }
1738       break;
1739
1740    case MESA_SHADER_COMPUTE:
1741       if (state->cs_input_local_size_specified) {
1742          for (int i = 0; i < 3; i++)
1743             shader->Comp.LocalSize[i] = state->cs_input_local_size[i];
1744       } else {
1745          for (int i = 0; i < 3; i++)
1746             shader->Comp.LocalSize[i] = 0;
1747       }
1748       break;
1749
1750    case MESA_SHADER_FRAGMENT:
1751       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1752       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1753       shader->pixel_center_integer = state->fs_pixel_center_integer;
1754       shader->origin_upper_left = state->fs_origin_upper_left;
1755       shader->ARB_fragment_coord_conventions_enable =
1756          state->ARB_fragment_coord_conventions_enable;
1757       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1758       break;
1759
1760    default:
1761       /* Nothing to do. */
1762       break;
1763    }
1764 }
1765
1766 extern "C" {
1767
1768 static void
1769 assign_subroutine_indexes(struct gl_shader *sh,
1770                           struct _mesa_glsl_parse_state *state)
1771 {
1772    int j, k;
1773    int index = 0;
1774
1775    for (j = 0; j < state->num_subroutines; j++) {
1776       while (state->subroutines[j]->subroutine_index == -1) {
1777          for (k = 0; k < state->num_subroutines; k++) {
1778             if (state->subroutines[k]->subroutine_index == index)
1779                break;
1780             else if (k == state->num_subroutines - 1) {
1781                state->subroutines[j]->subroutine_index = index;
1782             }
1783          }
1784          index++;
1785       }
1786    }
1787 }
1788
1789 void
1790 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
1791                           bool dump_ast, bool dump_hir)
1792 {
1793    struct _mesa_glsl_parse_state *state =
1794       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
1795    const char *source = shader->Source;
1796
1797    if (ctx->Const.GenerateTemporaryNames)
1798       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
1799                               false, true);
1800
1801    state->error = glcpp_preprocess(state, &source, &state->info_log,
1802                              &ctx->Extensions, ctx);
1803
1804    if (!state->error) {
1805      _mesa_glsl_lexer_ctor(state, source);
1806      _mesa_glsl_parse(state);
1807      _mesa_glsl_lexer_dtor(state);
1808    }
1809
1810    if (dump_ast) {
1811       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
1812          ast->print();
1813       }
1814       printf("\n\n");
1815    }
1816
1817    ralloc_free(shader->ir);
1818    shader->ir = new(shader) exec_list;
1819    if (!state->error && !state->translation_unit.is_empty())
1820       _mesa_ast_to_hir(shader->ir, state);
1821
1822    if (!state->error) {
1823       validate_ir_tree(shader->ir);
1824
1825       /* Print out the unoptimized IR. */
1826       if (dump_hir) {
1827          _mesa_print_ir(stdout, shader->ir, state);
1828       }
1829    }
1830
1831
1832    if (!state->error && !shader->ir->is_empty()) {
1833       struct gl_shader_compiler_options *options =
1834          &ctx->Const.ShaderCompilerOptions[shader->Stage];
1835
1836       assign_subroutine_indexes(shader, state);
1837       lower_subroutine(shader->ir, state);
1838       /* Do some optimization at compile time to reduce shader IR size
1839        * and reduce later work if the same shader is linked multiple times
1840        */
1841       while (do_common_optimization(shader->ir, false, false, options,
1842                                     ctx->Const.NativeIntegers))
1843          ;
1844
1845       validate_ir_tree(shader->ir);
1846
1847       enum ir_variable_mode other;
1848       switch (shader->Stage) {
1849       case MESA_SHADER_VERTEX:
1850          other = ir_var_shader_in;
1851          break;
1852       case MESA_SHADER_FRAGMENT:
1853          other = ir_var_shader_out;
1854          break;
1855       default:
1856          /* Something invalid to ensure optimize_dead_builtin_uniforms
1857           * doesn't remove anything other than uniforms or constants.
1858           */
1859          other = ir_var_mode_count;
1860          break;
1861       }
1862
1863       optimize_dead_builtin_variables(shader->ir, other);
1864
1865       validate_ir_tree(shader->ir);
1866    }
1867
1868    if (shader->InfoLog)
1869       ralloc_free(shader->InfoLog);
1870
1871    if (!state->error)
1872       set_shader_inout_layout(shader, state);
1873
1874    shader->symbols = new(shader->ir) glsl_symbol_table;
1875    shader->CompileStatus = !state->error;
1876    shader->InfoLog = state->info_log;
1877    shader->Version = state->language_version;
1878    shader->IsES = state->es_shader;
1879    shader->uses_builtin_functions = state->uses_builtin_functions;
1880
1881    /* Retain any live IR, but trash the rest. */
1882    reparent_ir(shader->ir, shader->ir);
1883
1884    /* Destroy the symbol table.  Create a new symbol table that contains only
1885     * the variables and functions that still exist in the IR.  The symbol
1886     * table will be used later during linking.
1887     *
1888     * There must NOT be any freed objects still referenced by the symbol
1889     * table.  That could cause the linker to dereference freed memory.
1890     *
1891     * We don't have to worry about types or interface-types here because those
1892     * are fly-weights that are looked up by glsl_type.
1893     */
1894    foreach_in_list (ir_instruction, ir, shader->ir) {
1895       switch (ir->ir_type) {
1896       case ir_type_function:
1897          shader->symbols->add_function((ir_function *) ir);
1898          break;
1899       case ir_type_variable: {
1900          ir_variable *const var = (ir_variable *) ir;
1901
1902          if (var->data.mode != ir_var_temporary)
1903             shader->symbols->add_variable(var);
1904          break;
1905       }
1906       default:
1907          break;
1908       }
1909    }
1910
1911    _mesa_glsl_initialize_derived_variables(ctx, shader);
1912
1913    delete state->symbols;
1914    ralloc_free(state);
1915 }
1916
1917 } /* extern "C" */
1918 /**
1919  * Do the set of common optimizations passes
1920  *
1921  * \param ir                          List of instructions to be optimized
1922  * \param linked                      Is the shader linked?  This enables
1923  *                                    optimizations passes that remove code at
1924  *                                    global scope and could cause linking to
1925  *                                    fail.
1926  * \param uniform_locations_assigned  Have locations already been assigned for
1927  *                                    uniforms?  This prevents the declarations
1928  *                                    of unused uniforms from being removed.
1929  *                                    The setting of this flag only matters if
1930  *                                    \c linked is \c true.
1931  * \param max_unroll_iterations       Maximum number of loop iterations to be
1932  *                                    unrolled.  Setting to 0 disables loop
1933  *                                    unrolling.
1934  * \param options                     The driver's preferred shader options.
1935  */
1936 bool
1937 do_common_optimization(exec_list *ir, bool linked,
1938                        bool uniform_locations_assigned,
1939                        const struct gl_shader_compiler_options *options,
1940                        bool native_integers)
1941 {
1942    const bool debug = false;
1943    GLboolean progress = GL_FALSE;
1944
1945 #define OPT(PASS, ...) do {                                             \
1946       if (debug) {                                                      \
1947          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
1948          const bool opt_progress = PASS(__VA_ARGS__);                   \
1949          progress = opt_progress || progress;                           \
1950          if (opt_progress)                                              \
1951             _mesa_print_ir(stderr, ir, NULL);                           \
1952          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
1953                  #PASS, opt_progress ? "made" : "no");                  \
1954       } else {                                                          \
1955          progress = PASS(__VA_ARGS__) || progress;                      \
1956       }                                                                 \
1957    } while (false)
1958
1959    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
1960
1961    if (linked) {
1962       OPT(do_function_inlining, ir);
1963       OPT(do_dead_functions, ir);
1964       OPT(do_structure_splitting, ir);
1965    }
1966    propagate_invariance(ir);
1967    OPT(do_if_simplification, ir);
1968    OPT(opt_flatten_nested_if_blocks, ir);
1969    OPT(opt_conditional_discard, ir);
1970    OPT(do_copy_propagation, ir);
1971    OPT(do_copy_propagation_elements, ir);
1972
1973    if (options->OptimizeForAOS && !linked)
1974       OPT(opt_flip_matrices, ir);
1975
1976    if (linked && options->OptimizeForAOS) {
1977       OPT(do_vectorize, ir);
1978    }
1979
1980    if (linked)
1981       OPT(do_dead_code, ir, uniform_locations_assigned);
1982    else
1983       OPT(do_dead_code_unlinked, ir);
1984    OPT(do_dead_code_local, ir);
1985    OPT(do_tree_grafting, ir);
1986    OPT(do_constant_propagation, ir);
1987    if (linked)
1988       OPT(do_constant_variable, ir);
1989    else
1990       OPT(do_constant_variable_unlinked, ir);
1991    OPT(do_constant_folding, ir);
1992    OPT(do_minmax_prune, ir);
1993    OPT(do_rebalance_tree, ir);
1994    OPT(do_algebraic, ir, native_integers, options);
1995    OPT(do_lower_jumps, ir);
1996    OPT(do_vec_index_to_swizzle, ir);
1997    OPT(lower_vector_insert, ir, false);
1998    OPT(do_swizzle_swizzle, ir);
1999    OPT(do_noop_swizzle, ir);
2000
2001    OPT(optimize_split_arrays, ir, linked);
2002    OPT(optimize_redundant_jumps, ir);
2003
2004    loop_state *ls = analyze_loop_variables(ir);
2005    if (ls->loop_found) {
2006       OPT(set_loop_controls, ir, ls);
2007       OPT(unroll_loops, ir, ls, options);
2008    }
2009    delete ls;
2010
2011 #undef OPT
2012
2013    return progress;
2014 }
2015
2016 extern "C" {
2017
2018 /**
2019  * To be called at GL teardown time, this frees compiler datastructures.
2020  *
2021  * After calling this, any previously compiled shaders and shader
2022  * programs would be invalid.  So this should happen at approximately
2023  * program exit.
2024  */
2025 void
2026 _mesa_destroy_shader_compiler(void)
2027 {
2028    _mesa_destroy_shader_compiler_caches();
2029
2030    _mesa_glsl_release_types();
2031 }
2032
2033 /**
2034  * Releases compiler caches to trade off performance for memory.
2035  *
2036  * Intended to be used with glReleaseShaderCompiler().
2037  */
2038 void
2039 _mesa_destroy_shader_compiler_caches(void)
2040 {
2041    _mesa_glsl_release_builtin_functions();
2042 }
2043
2044 }