src/compiler/glsl/glsl_parser_extras.cpp

   1 /*
   2  * Copyright © 2008, 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23 #include <inttypes.h> /* for PRIx64 macro */
  24 #include <stdio.h>
  25 #include <stdarg.h>
  26 #include <string.h>
  27 #include <assert.h>
  28
  29 #include "main/core.h" /* for struct gl_context */
  30 #include "main/context.h"
  31 #include "main/debug_output.h"
  32 #include "main/formats.h"
  33 #include "main/shaderobj.h"
  34 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
  35 #include "util/ralloc.h"
  36 #include "ast.h"
  37 #include "glsl_parser_extras.h"
  38 #include "glsl_parser.h"
  39 #include "ir_optimization.h"
  40 #include "loop_analysis.h"
  41 #include "builtin_functions.h"
  42
  43 /**
  44  * Format a short human-readable description of the given GLSL version.
  45  */
  46 const char *
  47 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
  48 {
  49    return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
  50                           version / 100, version % 100);
  51 }
  52
  53
  54 static const unsigned known_desktop_glsl_versions[] =
  55    { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450 };
  56 static const unsigned known_desktop_gl_versions[] =
  57    {  20,  21,  30,  31,  32,  33,  40,  41,  42,  43,  44,  45 };
  58
  59
  60 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
  61                                                gl_shader_stage stage,
  62                                                void *mem_ctx)
  63    : ctx(_ctx), cs_input_local_size_specified(false), cs_input_local_size(),
  64      switch_state()
  65 {
  66    assert(stage < MESA_SHADER_STAGES);
  67    this->stage = stage;
  68
  69    this->scanner = NULL;
  70    this->translation_unit.make_empty();
  71    this->symbols = new(mem_ctx) glsl_symbol_table;
  72
  73    this->linalloc = linear_alloc_parent(this, 0);
  74
  75    this->info_log = ralloc_strdup(mem_ctx, "");
  76    this->error = false;
  77    this->loop_nesting_ast = NULL;
  78
  79    this->uses_builtin_functions = false;
  80
  81    /* Set default language version and extensions */
  82    this->language_version = 110;
  83    this->forced_language_version = ctx->Const.ForceGLSLVersion;
  84    this->zero_init = ctx->Const.GLSLZeroInit;
  85    this->gl_version = 20;
  86    this->compat_shader = true;
  87    this->es_shader = false;
  88    this->ARB_texture_rectangle_enable = true;
  89
  90    /* OpenGL ES 2.0 has different defaults from desktop GL. */
  91    if (ctx->API == API_OPENGLES2) {
  92       this->language_version = 100;
  93       this->es_shader = true;
  94       this->ARB_texture_rectangle_enable = false;
  95    }
  96
  97    this->extensions = &ctx->Extensions;
  98
  99    this->Const.MaxLights = ctx->Const.MaxLights;
 100    this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
 101    this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
 102    this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
 103    this->Const.MaxVertexAttribs = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs;
 104    this->Const.MaxVertexUniformComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxUniformComponents;
 105    this->Const.MaxVertexTextureImageUnits = ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits;
 106    this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
 107    this->Const.MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
 108    this->Const.MaxFragmentUniformComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxUniformComponents;
 109    this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset;
 110    this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset;
 111
 112    this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
 113
 114    this->Const.MaxDualSourceDrawBuffers = ctx->Const.MaxDualSourceDrawBuffers;
 115
 116    /* 1.50 constants */
 117    this->Const.MaxVertexOutputComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents;
 118    this->Const.MaxGeometryInputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxInputComponents;
 119    this->Const.MaxGeometryOutputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxOutputComponents;
 120    this->Const.MaxFragmentInputComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents;
 121    this->Const.MaxGeometryTextureImageUnits = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits;
 122    this->Const.MaxGeometryOutputVertices = ctx->Const.MaxGeometryOutputVertices;
 123    this->Const.MaxGeometryTotalOutputComponents = ctx->Const.MaxGeometryTotalOutputComponents;
 124    this->Const.MaxGeometryUniformComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxUniformComponents;
 125
 126    this->Const.MaxVertexAtomicCounters = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicCounters;
 127    this->Const.MaxTessControlAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters;
 128    this->Const.MaxTessEvaluationAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicCounters;
 129    this->Const.MaxGeometryAtomicCounters = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicCounters;
 130    this->Const.MaxFragmentAtomicCounters = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
 131    this->Const.MaxComputeAtomicCounters = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicCounters;
 132    this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
 133    this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
 134    this->Const.MaxVertexAtomicCounterBuffers =
 135       ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicBuffers;
 136    this->Const.MaxTessControlAtomicCounterBuffers =
 137       ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers;
 138    this->Const.MaxTessEvaluationAtomicCounterBuffers =
 139       ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers;
 140    this->Const.MaxGeometryAtomicCounterBuffers =
 141       ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers;
 142    this->Const.MaxFragmentAtomicCounterBuffers =
 143       ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
 144    this->Const.MaxComputeAtomicCounterBuffers =
 145       ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers;
 146    this->Const.MaxCombinedAtomicCounterBuffers =
 147       ctx->Const.MaxCombinedAtomicBuffers;
 148    this->Const.MaxAtomicCounterBufferSize =
 149       ctx->Const.MaxAtomicBufferSize;
 150
 151    /* ARB_enhanced_layouts constants */
 152    this->Const.MaxTransformFeedbackBuffers = ctx->Const.MaxTransformFeedbackBuffers;
 153    this->Const.MaxTransformFeedbackInterleavedComponents = ctx->Const.MaxTransformFeedbackInterleavedComponents;
 154
 155    /* Compute shader constants */
 156    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupCount); i++)
 157       this->Const.MaxComputeWorkGroupCount[i] = ctx->Const.MaxComputeWorkGroupCount[i];
 158    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupSize); i++)
 159       this->Const.MaxComputeWorkGroupSize[i] = ctx->Const.MaxComputeWorkGroupSize[i];
 160
 161    this->Const.MaxComputeTextureImageUnits = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
 162    this->Const.MaxComputeUniformComponents = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxUniformComponents;
 163
 164    this->Const.MaxImageUnits = ctx->Const.MaxImageUnits;
 165    this->Const.MaxCombinedShaderOutputResources = ctx->Const.MaxCombinedShaderOutputResources;
 166    this->Const.MaxImageSamples = ctx->Const.MaxImageSamples;
 167    this->Const.MaxVertexImageUniforms = ctx->Const.Program[MESA_SHADER_VERTEX].MaxImageUniforms;
 168    this->Const.MaxTessControlImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms;
 169    this->Const.MaxTessEvaluationImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms;
 170    this->Const.MaxGeometryImageUniforms = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxImageUniforms;
 171    this->Const.MaxFragmentImageUniforms = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxImageUniforms;
 172    this->Const.MaxComputeImageUniforms = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
 173    this->Const.MaxCombinedImageUniforms = ctx->Const.MaxCombinedImageUniforms;
 174
 175    /* ARB_viewport_array */
 176    this->Const.MaxViewports = ctx->Const.MaxViewports;
 177
 178    /* tessellation shader constants */
 179    this->Const.MaxPatchVertices = ctx->Const.MaxPatchVertices;
 180    this->Const.MaxTessGenLevel = ctx->Const.MaxTessGenLevel;
 181    this->Const.MaxTessControlInputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents;
 182    this->Const.MaxTessControlOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents;
 183    this->Const.MaxTessControlTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits;
 184    this->Const.MaxTessEvaluationInputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents;
 185    this->Const.MaxTessEvaluationOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents;
 186    this->Const.MaxTessEvaluationTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits;
 187    this->Const.MaxTessPatchComponents = ctx->Const.MaxTessPatchComponents;
 188    this->Const.MaxTessControlTotalOutputComponents = ctx->Const.MaxTessControlTotalOutputComponents;
 189    this->Const.MaxTessControlUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents;
 190    this->Const.MaxTessEvaluationUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents;
 191
 192    /* GL 4.5 / OES_sample_variables */
 193    this->Const.MaxSamples = ctx->Const.MaxSamples;
 194
 195    this->current_function = NULL;
 196    this->toplevel_ir = NULL;
 197    this->found_return = false;
 198    this->all_invariant = false;
 199    this->user_structures = NULL;
 200    this->num_user_structures = 0;
 201    this->num_subroutines = 0;
 202    this->subroutines = NULL;
 203    this->num_subroutine_types = 0;
 204    this->subroutine_types = NULL;
 205
 206    /* supported_versions should be large enough to support the known desktop
 207     * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
 208     */
 209    STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 4) ==
 210                  ARRAY_SIZE(this->supported_versions));
 211
 212    /* Populate the list of supported GLSL versions */
 213    /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
 214     * the OpenGL 3.2 Core context is supported, this logic will need
 215     * change.  Older versions of GLSL are no longer supported
 216     * outside the compatibility contexts of 3.x.
 217     */
 218    this->num_supported_versions = 0;
 219    if (_mesa_is_desktop_gl(ctx)) {
 220       for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
 221          if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
 222             this->supported_versions[this->num_supported_versions].ver
 223                = known_desktop_glsl_versions[i];
 224             this->supported_versions[this->num_supported_versions].gl_ver
 225                = known_desktop_gl_versions[i];
 226             this->supported_versions[this->num_supported_versions].es = false;
 227             this->num_supported_versions++;
 228          }
 229       }
 230    }
 231    if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
 232       this->supported_versions[this->num_supported_versions].ver = 100;
 233       this->supported_versions[this->num_supported_versions].gl_ver = 20;
 234       this->supported_versions[this->num_supported_versions].es = true;
 235       this->num_supported_versions++;
 236    }
 237    if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
 238       this->supported_versions[this->num_supported_versions].ver = 300;
 239       this->supported_versions[this->num_supported_versions].gl_ver = 30;
 240       this->supported_versions[this->num_supported_versions].es = true;
 241       this->num_supported_versions++;
 242    }
 243    if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
 244       this->supported_versions[this->num_supported_versions].ver = 310;
 245       this->supported_versions[this->num_supported_versions].gl_ver = 31;
 246       this->supported_versions[this->num_supported_versions].es = true;
 247       this->num_supported_versions++;
 248    }
 249    if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
 250        ctx->Extensions.ARB_ES3_2_compatibility) {
 251       this->supported_versions[this->num_supported_versions].ver = 320;
 252       this->supported_versions[this->num_supported_versions].gl_ver = 32;
 253       this->supported_versions[this->num_supported_versions].es = true;
 254       this->num_supported_versions++;
 255    }
 256
 257    /* Create a string for use in error messages to tell the user which GLSL
 258     * versions are supported.
 259     */
 260    char *supported = ralloc_strdup(this, "");
 261    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 262       unsigned ver = this->supported_versions[i].ver;
 263       const char *const prefix = (i == 0)
 264          ? ""
 265          : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
 266       const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
 267
 268       ralloc_asprintf_append(& supported, "%s%u.%02u%s",
 269                              prefix,
 270                              ver / 100, ver % 100,
 271                              suffix);
 272    }
 273
 274    this->supported_version_string = supported;
 275
 276    if (ctx->Const.ForceGLSLExtensionsWarn)
 277       _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
 278
 279    this->default_uniform_qualifier = new(this) ast_type_qualifier();
 280    this->default_uniform_qualifier->flags.q.shared = 1;
 281    this->default_uniform_qualifier->flags.q.column_major = 1;
 282
 283    this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
 284    this->default_shader_storage_qualifier->flags.q.shared = 1;
 285    this->default_shader_storage_qualifier->flags.q.column_major = 1;
 286
 287    this->fs_uses_gl_fragcoord = false;
 288    this->fs_redeclares_gl_fragcoord = false;
 289    this->fs_origin_upper_left = false;
 290    this->fs_pixel_center_integer = false;
 291    this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
 292
 293    this->gs_input_prim_type_specified = false;
 294    this->tcs_output_vertices_specified = false;
 295    this->gs_input_size = 0;
 296    this->in_qualifier = new(this) ast_type_qualifier();
 297    this->out_qualifier = new(this) ast_type_qualifier();
 298    this->fs_early_fragment_tests = false;
 299    this->fs_inner_coverage = false;
 300    this->fs_post_depth_coverage = false;
 301    this->fs_blend_support = 0;
 302    memset(this->atomic_counter_offsets, 0,
 303           sizeof(this->atomic_counter_offsets));
 304    this->allow_extension_directive_midshader =
 305       ctx->Const.AllowGLSLExtensionDirectiveMidShader;
 306
 307    this->cs_input_local_size_variable_specified = false;
 308 }
 309
 310 /**
 311  * Determine whether the current GLSL version is sufficiently high to support
 312  * a certain feature, and generate an error message if it isn't.
 313  *
 314  * \param required_glsl_version and \c required_glsl_es_version are
 315  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 316  *
 317  * \param locp is the parser location where the error should be reported.
 318  *
 319  * \param fmt (and additional arguments) constitute a printf-style error
 320  * message to report if the version check fails.  Information about the
 321  * current and required GLSL versions will be appended.  So, for example, if
 322  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 323  * "foo unsupported") is called, the error message will be "foo unsupported in
 324  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 325  */
 326 bool
 327 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 328                                       unsigned required_glsl_es_version,
 329                                       YYLTYPE *locp, const char *fmt, ...)
 330 {
 331    if (this->is_version(required_glsl_version, required_glsl_es_version))
 332       return true;
 333
 334    va_list args;
 335    va_start(args, fmt);
 336    char *problem = ralloc_vasprintf(this, fmt, args);
 337    va_end(args);
 338    const char *glsl_version_string
 339       = glsl_compute_version_string(this, false, required_glsl_version);
 340    const char *glsl_es_version_string
 341       = glsl_compute_version_string(this, true, required_glsl_es_version);
 342    const char *requirement_string = "";
 343    if (required_glsl_version && required_glsl_es_version) {
 344       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 345                                            glsl_version_string,
 346                                            glsl_es_version_string);
 347    } else if (required_glsl_version) {
 348       requirement_string = ralloc_asprintf(this, " (%s required)",
 349                                            glsl_version_string);
 350    } else if (required_glsl_es_version) {
 351       requirement_string = ralloc_asprintf(this, " (%s required)",
 352                                            glsl_es_version_string);
 353    }
 354    _mesa_glsl_error(locp, this, "%s in %s%s",
 355                     problem, this->get_version_string(),
 356                     requirement_string);
 357
 358    return false;
 359 }
 360
 361 /**
 362  * Process a GLSL #version directive.
 363  *
 364  * \param version is the integer that follows the #version token.
 365  *
 366  * \param ident is a string identifier that follows the integer, if any is
 367  * present.  Otherwise NULL.
 368  */
 369 void
 370 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 371                                                   const char *ident)
 372 {
 373    bool es_token_present = false;
 374    bool compat_token_present = false;
 375    if (ident) {
 376       if (strcmp(ident, "es") == 0) {
 377          es_token_present = true;
 378       } else if (version >= 150) {
 379          if (strcmp(ident, "core") == 0) {
 380             /* Accept the token.  There's no need to record that this is
 381              * a core profile shader since that's the only profile we support.
 382              */
 383          } else if (strcmp(ident, "compatibility") == 0) {
 384             compat_token_present = true;
 385
 386             if (this->ctx->API != API_OPENGL_COMPAT) {
 387                _mesa_glsl_error(locp, this,
 388                                 "the compatibility profile is not supported");
 389             }
 390          } else {
 391             _mesa_glsl_error(locp, this,
 392                              "\"%s\" is not a valid shading language profile; "
 393                              "if present, it must be \"core\"", ident);
 394          }
 395       } else {
 396          _mesa_glsl_error(locp, this,
 397                           "illegal text following version number");
 398       }
 399    }
 400
 401    this->es_shader = es_token_present;
 402    if (version == 100) {
 403       if (es_token_present) {
 404          _mesa_glsl_error(locp, this,
 405                           "GLSL 1.00 ES should be selected using "
 406                           "`#version 100'");
 407       } else {
 408          this->es_shader = true;
 409       }
 410    }
 411
 412    if (this->es_shader) {
 413       this->ARB_texture_rectangle_enable = false;
 414    }
 415
 416    if (this->forced_language_version)
 417       this->language_version = this->forced_language_version;
 418    else
 419       this->language_version = version;
 420
 421    this->compat_shader = compat_token_present ||
 422                          (!this->es_shader && this->language_version < 140);
 423
 424    bool supported = false;
 425    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 426       if (this->supported_versions[i].ver == this->language_version
 427           && this->supported_versions[i].es == this->es_shader) {
 428          this->gl_version = this->supported_versions[i].gl_ver;
 429          supported = true;
 430          break;
 431       }
 432    }
 433
 434    if (!supported) {
 435       _mesa_glsl_error(locp, this, "%s is not supported. "
 436                        "Supported versions are: %s",
 437                        this->get_version_string(),
 438                        this->supported_version_string);
 439
 440       /* On exit, the language_version must be set to a valid value.
 441        * Later calls to _mesa_glsl_initialize_types will misbehave if
 442        * the version is invalid.
 443        */
 444       switch (this->ctx->API) {
 445       case API_OPENGL_COMPAT:
 446       case API_OPENGL_CORE:
 447          this->language_version = this->ctx->Const.GLSLVersion;
 448          break;
 449
 450       case API_OPENGLES:
 451          assert(!"Should not get here.");
 452          /* FALLTHROUGH */
 453
 454       case API_OPENGLES2:
 455          this->language_version = 100;
 456          break;
 457       }
 458    }
 459 }
 460
 461
 462 /* This helper function will append the given message to the shader's
 463    info log and report it via GL_ARB_debug_output. Per that extension,
 464    'type' is one of the enum values classifying the message, and
 465    'id' is the implementation-defined ID of the given message. */
 466 static void
 467 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 468                GLenum type, const char *fmt, va_list ap)
 469 {
 470    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 471    GLuint msg_id = 0;
 472
 473    assert(state->info_log != NULL);
 474
 475    /* Get the offset that the new message will be written to. */
 476    int msg_offset = strlen(state->info_log);
 477
 478    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 479                                             locp->source,
 480                                             locp->first_line,
 481                                             locp->first_column,
 482                                             error ? "error" : "warning");
 483    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 484
 485    const char *const msg = &state->info_log[msg_offset];
 486    struct gl_context *ctx = state->ctx;
 487
 488    /* Report the error via GL_ARB_debug_output. */
 489    _mesa_shader_debug(ctx, type, &msg_id, msg);
 490
 491    ralloc_strcat(&state->info_log, "\n");
 492 }
 493
 494 void
 495 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 496                  const char *fmt, ...)
 497 {
 498    va_list ap;
 499
 500    state->error = true;
 501
 502    va_start(ap, fmt);
 503    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 504    va_end(ap);
 505 }
 506
 507
 508 void
 509 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 510                    const char *fmt, ...)
 511 {
 512    va_list ap;
 513
 514    va_start(ap, fmt);
 515    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 516    va_end(ap);
 517 }
 518
 519
 520 /**
 521  * Enum representing the possible behaviors that can be specified in
 522  * an #extension directive.
 523  */
 524 enum ext_behavior {
 525    extension_disable,
 526    extension_enable,
 527    extension_require,
 528    extension_warn
 529 };
 530
 531 /**
 532  * Element type for _mesa_glsl_supported_extensions
 533  */
 534 struct _mesa_glsl_extension {
 535    /**
 536     * Name of the extension when referred to in a GLSL extension
 537     * statement
 538     */
 539    const char *name;
 540
 541    /**
 542     * Whether this extension is a part of AEP
 543     */
 544    bool aep;
 545
 546    /**
 547     * Predicate that checks whether the relevant extension is available for
 548     * this context.
 549     */
 550    bool (*available_pred)(const struct gl_context *,
 551                           gl_api api, uint8_t version);
 552
 553    /**
 554     * Flag in the _mesa_glsl_parse_state struct that should be set
 555     * when this extension is enabled.
 556     *
 557     * See note in _mesa_glsl_extension::supported_flag about "pointer
 558     * to member" types.
 559     */
 560    bool _mesa_glsl_parse_state::* enable_flag;
 561
 562    /**
 563     * Flag in the _mesa_glsl_parse_state struct that should be set
 564     * when the shader requests "warn" behavior for this extension.
 565     *
 566     * See note in _mesa_glsl_extension::supported_flag about "pointer
 567     * to member" types.
 568     */
 569    bool _mesa_glsl_parse_state::* warn_flag;
 570
 571
 572    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 573                               gl_api api, uint8_t gl_version) const;
 574    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 575 };
 576
 577 /** Checks if the context supports a user-facing extension */
 578 #define EXT(name_str, driver_cap, ...) \
 579 static MAYBE_UNUSED bool \
 580 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 581 { \
 582    return ctx->Extensions.driver_cap && (version >= \
 583           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 584 }
 585 #include "main/extensions_table.h"
 586 #undef EXT
 587
 588 #define EXT(NAME)                                           \
 589    { "GL_" #NAME, false, has_##NAME,                        \
 590      &_mesa_glsl_parse_state::NAME##_enable,                \
 591      &_mesa_glsl_parse_state::NAME##_warn }
 592
 593 #define EXT_AEP(NAME)                                       \
 594    { "GL_" #NAME, true, has_##NAME,                         \
 595      &_mesa_glsl_parse_state::NAME##_enable,                \
 596      &_mesa_glsl_parse_state::NAME##_warn }
 597
 598 /**
 599  * Table of extensions that can be enabled/disabled within a shader,
 600  * and the conditions under which they are supported.
 601  */
 602 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 603    /* ARB extensions go here, sorted alphabetically.
 604     */
 605    EXT(ARB_ES3_1_compatibility),
 606    EXT(ARB_ES3_2_compatibility),
 607    EXT(ARB_arrays_of_arrays),
 608    EXT(ARB_compute_shader),
 609    EXT(ARB_compute_variable_group_size),
 610    EXT(ARB_conservative_depth),
 611    EXT(ARB_cull_distance),
 612    EXT(ARB_derivative_control),
 613    EXT(ARB_draw_buffers),
 614    EXT(ARB_draw_instanced),
 615    EXT(ARB_enhanced_layouts),
 616    EXT(ARB_explicit_attrib_location),
 617    EXT(ARB_explicit_uniform_location),
 618    EXT(ARB_fragment_coord_conventions),
 619    EXT(ARB_fragment_layer_viewport),
 620    EXT(ARB_gpu_shader5),
 621    EXT(ARB_gpu_shader_fp64),
 622    EXT(ARB_gpu_shader_int64),
 623    EXT(ARB_post_depth_coverage),
 624    EXT(ARB_sample_shading),
 625    EXT(ARB_separate_shader_objects),
 626    EXT(ARB_shader_atomic_counter_ops),
 627    EXT(ARB_shader_atomic_counters),
 628    EXT(ARB_shader_bit_encoding),
 629    EXT(ARB_shader_clock),
 630    EXT(ARB_shader_draw_parameters),
 631    EXT(ARB_shader_group_vote),
 632    EXT(ARB_shader_image_load_store),
 633    EXT(ARB_shader_image_size),
 634    EXT(ARB_shader_precision),
 635    EXT(ARB_shader_stencil_export),
 636    EXT(ARB_shader_storage_buffer_object),
 637    EXT(ARB_shader_subroutine),
 638    EXT(ARB_shader_texture_image_samples),
 639    EXT(ARB_shader_texture_lod),
 640    EXT(ARB_shader_viewport_layer_array),
 641    EXT(ARB_shading_language_420pack),
 642    EXT(ARB_shading_language_packing),
 643    EXT(ARB_tessellation_shader),
 644    EXT(ARB_texture_cube_map_array),
 645    EXT(ARB_texture_gather),
 646    EXT(ARB_texture_multisample),
 647    EXT(ARB_texture_query_levels),
 648    EXT(ARB_texture_query_lod),
 649    EXT(ARB_texture_rectangle),
 650    EXT(ARB_uniform_buffer_object),
 651    EXT(ARB_vertex_attrib_64bit),
 652    EXT(ARB_viewport_array),
 653
 654    /* KHR extensions go here, sorted alphabetically.
 655     */
 656    EXT_AEP(KHR_blend_equation_advanced),
 657
 658    /* OES extensions go here, sorted alphabetically.
 659     */
 660    EXT(OES_EGL_image_external),
 661    EXT(OES_geometry_point_size),
 662    EXT(OES_geometry_shader),
 663    EXT(OES_gpu_shader5),
 664    EXT(OES_primitive_bounding_box),
 665    EXT_AEP(OES_sample_variables),
 666    EXT_AEP(OES_shader_image_atomic),
 667    EXT(OES_shader_io_blocks),
 668    EXT_AEP(OES_shader_multisample_interpolation),
 669    EXT(OES_standard_derivatives),
 670    EXT(OES_tessellation_point_size),
 671    EXT(OES_tessellation_shader),
 672    EXT(OES_texture_3D),
 673    EXT(OES_texture_buffer),
 674    EXT(OES_texture_cube_map_array),
 675    EXT_AEP(OES_texture_storage_multisample_2d_array),
 676    EXT(OES_viewport_array),
 677
 678    /* All other extensions go here, sorted alphabetically.
 679     */
 680    EXT(AMD_conservative_depth),
 681    EXT(AMD_shader_stencil_export),
 682    EXT(AMD_shader_trinary_minmax),
 683    EXT(AMD_vertex_shader_layer),
 684    EXT(AMD_vertex_shader_viewport_index),
 685    EXT(ANDROID_extension_pack_es31a),
 686    EXT(EXT_blend_func_extended),
 687    EXT(EXT_frag_depth),
 688    EXT(EXT_draw_buffers),
 689    EXT(EXT_clip_cull_distance),
 690    EXT(EXT_geometry_point_size),
 691    EXT_AEP(EXT_geometry_shader),
 692    EXT_AEP(EXT_gpu_shader5),
 693    EXT_AEP(EXT_primitive_bounding_box),
 694    EXT(EXT_separate_shader_objects),
 695    EXT(EXT_shader_framebuffer_fetch),
 696    EXT(EXT_shader_integer_mix),
 697    EXT_AEP(EXT_shader_io_blocks),
 698    EXT(EXT_shader_samples_identical),
 699    EXT(EXT_tessellation_point_size),
 700    EXT_AEP(EXT_tessellation_shader),
 701    EXT(EXT_texture_array),
 702    EXT_AEP(EXT_texture_buffer),
 703    EXT_AEP(EXT_texture_cube_map_array),
 704    EXT(INTEL_conservative_rasterization),
 705    EXT(MESA_shader_integer_functions),
 706    EXT(NV_image_formats),
 707 };
 708
 709 #undef EXT
 710
 711
 712 /**
 713  * Determine whether a given extension is compatible with the target,
 714  * API, and extension information in the current parser state.
 715  */
 716 bool _mesa_glsl_extension::compatible_with_state(
 717       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 718 {
 719    return this->available_pred(state->ctx, api, gl_version);
 720 }
 721
 722 /**
 723  * Set the appropriate flags in the parser state to establish the
 724  * given behavior for this extension.
 725  */
 726 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 727                                      ext_behavior behavior) const
 728 {
 729    /* Note: the ->* operator indexes into state by the
 730     * offsets this->enable_flag and this->warn_flag.  See
 731     * _mesa_glsl_extension::supported_flag for more info.
 732     */
 733    state->*(this->enable_flag) = (behavior != extension_disable);
 734    state->*(this->warn_flag)   = (behavior == extension_warn);
 735 }
 736
 737 /**
 738  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 739  * the name is not found, return NULL.
 740  */
 741 static const _mesa_glsl_extension *find_extension(const char *name)
 742 {
 743    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 744       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 745          return &_mesa_glsl_supported_extensions[i];
 746       }
 747    }
 748    return NULL;
 749 }
 750
 751 bool
 752 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 753                              const char *behavior_string, YYLTYPE *behavior_locp,
 754                              _mesa_glsl_parse_state *state)
 755 {
 756    uint8_t gl_version = state->ctx->Extensions.Version;
 757    gl_api api = state->ctx->API;
 758    ext_behavior behavior;
 759    if (strcmp(behavior_string, "warn") == 0) {
 760       behavior = extension_warn;
 761    } else if (strcmp(behavior_string, "require") == 0) {
 762       behavior = extension_require;
 763    } else if (strcmp(behavior_string, "enable") == 0) {
 764       behavior = extension_enable;
 765    } else if (strcmp(behavior_string, "disable") == 0) {
 766       behavior = extension_disable;
 767    } else {
 768       _mesa_glsl_error(behavior_locp, state,
 769                        "unknown extension behavior `%s'",
 770                        behavior_string);
 771       return false;
 772    }
 773
 774    /* If we're in a desktop context but with an ES shader, use an ES API enum
 775     * to verify extension availability.
 776     */
 777    if (state->es_shader && api != API_OPENGLES2)
 778       api = API_OPENGLES2;
 779    /* Use the language-version derived GL version to extension checks, unless
 780     * we're using meta, which sets the version to the max.
 781     */
 782    if (gl_version != 0xff)
 783       gl_version = state->gl_version;
 784
 785    if (strcmp(name, "all") == 0) {
 786       if ((behavior == extension_enable) || (behavior == extension_require)) {
 787          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 788                           (behavior == extension_enable)
 789                           ? "enable" : "require");
 790          return false;
 791       } else {
 792          for (unsigned i = 0;
 793               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 794             const _mesa_glsl_extension *extension
 795                = &_mesa_glsl_supported_extensions[i];
 796             if (extension->compatible_with_state(state, api, gl_version)) {
 797                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 798             }
 799          }
 800       }
 801    } else {
 802       const _mesa_glsl_extension *extension = find_extension(name);
 803       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 804          extension->set_flags(state, behavior);
 805          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 806             for (unsigned i = 0;
 807                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 808                const _mesa_glsl_extension *extension =
 809                   &_mesa_glsl_supported_extensions[i];
 810
 811                if (!extension->aep)
 812                   continue;
 813                /* AEP should not be enabled if all of the sub-extensions can't
 814                 * also be enabled. This is not the proper layer to do such
 815                 * error-checking though.
 816                 */
 817                assert(extension->compatible_with_state(state, api, gl_version));
 818                extension->set_flags(state, behavior);
 819             }
 820          }
 821       } else {
 822          static const char fmt[] = "extension `%s' unsupported in %s shader";
 823
 824          if (behavior == extension_require) {
 825             _mesa_glsl_error(name_locp, state, fmt,
 826                              name, _mesa_shader_stage_to_string(state->stage));
 827             return false;
 828          } else {
 829             _mesa_glsl_warning(name_locp, state, fmt,
 830                                name, _mesa_shader_stage_to_string(state->stage));
 831          }
 832       }
 833    }
 834
 835    return true;
 836 }
 837
 838
 839 /**
 840  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 841  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 842  * (process_array_constructor, et al) sufficient information to do type
 843  * checking.
 844  *
 845  * Operates on assignments involving an aggregate initializer. E.g.,
 846  *
 847  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 848  *
 849  * or more ridiculously,
 850  *
 851  * struct S {
 852  *     vec4 v[2];
 853  * };
 854  *
 855  * struct {
 856  *     S a[2], b;
 857  *     int c;
 858  * } aggregate = {
 859  *     {
 860  *         {
 861  *             {
 862  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 863  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 864  *             } // a[0].v
 865  *         }, // a[0]
 866  *         {
 867  *             {
 868  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 869  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 870  *             } // a[1].v
 871  *         } // a[1]
 872  *     }, // a
 873  *     {
 874  *         {
 875  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 876  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 877  *         } // b.v
 878  *     }, // b
 879  *     4 // c
 880  * };
 881  *
 882  * This pass is necessary because the right-hand side of <type> e = { ... }
 883  * doesn't contain sufficient information to determine if the types match.
 884  */
 885 void
 886 _mesa_ast_set_aggregate_type(const glsl_type *type,
 887                              ast_expression *expr)
 888 {
 889    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 890    ai->constructor_type = type;
 891
 892    /* If the aggregate is an array, recursively set its elements' types. */
 893    if (type->is_array()) {
 894       /* Each array element has the type type->fields.array.
 895        *
 896        * E.g., if <type> if struct S[2] we want to set each element's type to
 897        * struct S.
 898        */
 899       for (exec_node *expr_node = ai->expressions.get_head_raw();
 900            !expr_node->is_tail_sentinel();
 901            expr_node = expr_node->next) {
 902          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 903                                                link);
 904
 905          if (expr->oper == ast_aggregate)
 906             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 907       }
 908
 909    /* If the aggregate is a struct, recursively set its fields' types. */
 910    } else if (type->is_record()) {
 911       exec_node *expr_node = ai->expressions.get_head_raw();
 912
 913       /* Iterate through the struct's fields. */
 914       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 915            i++, expr_node = expr_node->next) {
 916          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 917                                                link);
 918
 919          if (expr->oper == ast_aggregate) {
 920             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 921          }
 922       }
 923    /* If the aggregate is a matrix, set its columns' types. */
 924    } else if (type->is_matrix()) {
 925       for (exec_node *expr_node = ai->expressions.get_head_raw();
 926            !expr_node->is_tail_sentinel();
 927            expr_node = expr_node->next) {
 928          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 929                                                link);
 930
 931          if (expr->oper == ast_aggregate)
 932             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 933       }
 934    }
 935 }
 936
 937 void
 938 _mesa_ast_process_interface_block(YYLTYPE *locp,
 939                                   _mesa_glsl_parse_state *state,
 940                                   ast_interface_block *const block,
 941                                   const struct ast_type_qualifier &q)
 942 {
 943    if (q.flags.q.buffer) {
 944       if (!state->has_shader_storage_buffer_objects()) {
 945          _mesa_glsl_error(locp, state,
 946                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 947                           "required for defining shader storage blocks");
 948       } else if (state->ARB_shader_storage_buffer_object_warn) {
 949          _mesa_glsl_warning(locp, state,
 950                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 951                             "required for defining shader storage blocks");
 952       }
 953    } else if (q.flags.q.uniform) {
 954       if (!state->has_uniform_buffer_objects()) {
 955          _mesa_glsl_error(locp, state,
 956                           "#version 140 / GL_ARB_uniform_buffer_object "
 957                           "required for defining uniform blocks");
 958       } else if (state->ARB_uniform_buffer_object_warn) {
 959          _mesa_glsl_warning(locp, state,
 960                             "#version 140 / GL_ARB_uniform_buffer_object "
 961                             "required for defining uniform blocks");
 962       }
 963    } else {
 964       if (!state->has_shader_io_blocks()) {
 965          if (state->es_shader) {
 966             _mesa_glsl_error(locp, state,
 967                              "GL_OES_shader_io_blocks or #version 320 "
 968                              "required for using interface blocks");
 969          } else {
 970             _mesa_glsl_error(locp, state,
 971                              "#version 150 required for using "
 972                              "interface blocks");
 973          }
 974       }
 975    }
 976
 977    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
 978     * "It is illegal to have an input block in a vertex shader
 979     *  or an output block in a fragment shader"
 980     */
 981    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
 982       _mesa_glsl_error(locp, state,
 983                        "`in' interface block is not allowed for "
 984                        "a vertex shader");
 985    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
 986       _mesa_glsl_error(locp, state,
 987                        "`out' interface block is not allowed for "
 988                        "a fragment shader");
 989    }
 990
 991    /* Since block arrays require names, and both features are added in
 992     * the same language versions, we don't have to explicitly
 993     * version-check both things.
 994     */
 995    if (block->instance_name != NULL) {
 996       state->check_version(150, 300, locp, "interface blocks with "
 997                            "an instance name are not allowed");
 998    }
 999
1000    uint64_t interface_type_mask;
1001    struct ast_type_qualifier temp_type_qualifier;
1002
1003    /* Get a bitmask containing only the in/out/uniform/buffer
1004     * flags, allowing us to ignore other irrelevant flags like
1005     * interpolation qualifiers.
1006     */
1007    temp_type_qualifier.flags.i = 0;
1008    temp_type_qualifier.flags.q.uniform = true;
1009    temp_type_qualifier.flags.q.in = true;
1010    temp_type_qualifier.flags.q.out = true;
1011    temp_type_qualifier.flags.q.buffer = true;
1012    temp_type_qualifier.flags.q.patch = true;
1013    interface_type_mask = temp_type_qualifier.flags.i;
1014
1015    /* Get the block's interface qualifier.  The interface_qualifier
1016     * production rule guarantees that only one bit will be set (and
1017     * it will be in/out/uniform).
1018     */
1019    uint64_t block_interface_qualifier = q.flags.i;
1020
1021    block->default_layout.flags.i |= block_interface_qualifier;
1022
1023    if (state->stage == MESA_SHADER_GEOMETRY &&
1024        state->has_explicit_attrib_stream() &&
1025        block->default_layout.flags.q.out) {
1026       /* Assign global layout's stream value. */
1027       block->default_layout.flags.q.stream = 1;
1028       block->default_layout.flags.q.explicit_stream = 0;
1029       block->default_layout.stream = state->out_qualifier->stream;
1030    }
1031
1032    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1033       /* Assign global layout's xfb_buffer value. */
1034       block->default_layout.flags.q.xfb_buffer = 1;
1035       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1036       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1037    }
1038
1039    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1040       ast_type_qualifier& qualifier = member->type->qualifier;
1041       if ((qualifier.flags.i & interface_type_mask) == 0) {
1042          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1043           * "If no optional qualifier is used in a member declaration, the
1044           *  qualifier of the variable is just in, out, or uniform as declared
1045           *  by interface-qualifier."
1046           */
1047          qualifier.flags.i |= block_interface_qualifier;
1048       } else if ((qualifier.flags.i & interface_type_mask) !=
1049                  block_interface_qualifier) {
1050          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1051           * "If optional qualifiers are used, they can include interpolation
1052           *  and storage qualifiers and they must declare an input, output,
1053           *  or uniform variable consistent with the interface qualifier of
1054           *  the block."
1055           */
1056          _mesa_glsl_error(locp, state,
1057                           "uniform/in/out qualifier on "
1058                           "interface block member does not match "
1059                           "the interface block");
1060       }
1061
1062       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1063          _mesa_glsl_error(locp, state,
1064                           "invariant qualifiers can be used only "
1065                           "in interface block members for shader "
1066                           "inputs or outputs");
1067    }
1068 }
1069
1070 void
1071 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1072 {
1073    if (q->flags.q.subroutine)
1074       printf("subroutine ");
1075
1076    if (q->flags.q.subroutine_def) {
1077       printf("subroutine (");
1078       q->subroutine_list->print();
1079       printf(")");
1080    }
1081
1082    if (q->flags.q.constant)
1083       printf("const ");
1084
1085    if (q->flags.q.invariant)
1086       printf("invariant ");
1087
1088    if (q->flags.q.attribute)
1089       printf("attribute ");
1090
1091    if (q->flags.q.varying)
1092       printf("varying ");
1093
1094    if (q->flags.q.in && q->flags.q.out)
1095       printf("inout ");
1096    else {
1097       if (q->flags.q.in)
1098          printf("in ");
1099
1100       if (q->flags.q.out)
1101          printf("out ");
1102    }
1103
1104    if (q->flags.q.centroid)
1105       printf("centroid ");
1106    if (q->flags.q.sample)
1107       printf("sample ");
1108    if (q->flags.q.patch)
1109       printf("patch ");
1110    if (q->flags.q.uniform)
1111       printf("uniform ");
1112    if (q->flags.q.buffer)
1113       printf("buffer ");
1114    if (q->flags.q.smooth)
1115       printf("smooth ");
1116    if (q->flags.q.flat)
1117       printf("flat ");
1118    if (q->flags.q.noperspective)
1119       printf("noperspective ");
1120 }
1121
1122
1123 void
1124 ast_node::print(void) const
1125 {
1126    printf("unhandled node ");
1127 }
1128
1129
1130 ast_node::ast_node(void)
1131 {
1132    this->location.source = 0;
1133    this->location.first_line = 0;
1134    this->location.first_column = 0;
1135    this->location.last_line = 0;
1136    this->location.last_column = 0;
1137 }
1138
1139
1140 static void
1141 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1142 {
1143    if (array_specifier)
1144       array_specifier->print();
1145 }
1146
1147
1148 void
1149 ast_compound_statement::print(void) const
1150 {
1151    printf("{\n");
1152
1153    foreach_list_typed(ast_node, ast, link, &this->statements) {
1154       ast->print();
1155    }
1156
1157    printf("}\n");
1158 }
1159
1160
1161 ast_compound_statement::ast_compound_statement(int new_scope,
1162                                                ast_node *statements)
1163 {
1164    this->new_scope = new_scope;
1165
1166    if (statements != NULL) {
1167       this->statements.push_degenerate_list_at_head(&statements->link);
1168    }
1169 }
1170
1171
1172 void
1173 ast_expression::print(void) const
1174 {
1175    switch (oper) {
1176    case ast_assign:
1177    case ast_mul_assign:
1178    case ast_div_assign:
1179    case ast_mod_assign:
1180    case ast_add_assign:
1181    case ast_sub_assign:
1182    case ast_ls_assign:
1183    case ast_rs_assign:
1184    case ast_and_assign:
1185    case ast_xor_assign:
1186    case ast_or_assign:
1187       subexpressions[0]->print();
1188       printf("%s ", operator_string(oper));
1189       subexpressions[1]->print();
1190       break;
1191
1192    case ast_field_selection:
1193       subexpressions[0]->print();
1194       printf(". %s ", primary_expression.identifier);
1195       break;
1196
1197    case ast_plus:
1198    case ast_neg:
1199    case ast_bit_not:
1200    case ast_logic_not:
1201    case ast_pre_inc:
1202    case ast_pre_dec:
1203       printf("%s ", operator_string(oper));
1204       subexpressions[0]->print();
1205       break;
1206
1207    case ast_post_inc:
1208    case ast_post_dec:
1209       subexpressions[0]->print();
1210       printf("%s ", operator_string(oper));
1211       break;
1212
1213    case ast_conditional:
1214       subexpressions[0]->print();
1215       printf("? ");
1216       subexpressions[1]->print();
1217       printf(": ");
1218       subexpressions[2]->print();
1219       break;
1220
1221    case ast_array_index:
1222       subexpressions[0]->print();
1223       printf("[ ");
1224       subexpressions[1]->print();
1225       printf("] ");
1226       break;
1227
1228    case ast_function_call: {
1229       subexpressions[0]->print();
1230       printf("( ");
1231
1232       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1233          if (&ast->link != this->expressions.get_head())
1234             printf(", ");
1235
1236          ast->print();
1237       }
1238
1239       printf(") ");
1240       break;
1241    }
1242
1243    case ast_identifier:
1244       printf("%s ", primary_expression.identifier);
1245       break;
1246
1247    case ast_int_constant:
1248       printf("%d ", primary_expression.int_constant);
1249       break;
1250
1251    case ast_uint_constant:
1252       printf("%u ", primary_expression.uint_constant);
1253       break;
1254
1255    case ast_float_constant:
1256       printf("%f ", primary_expression.float_constant);
1257       break;
1258
1259    case ast_double_constant:
1260       printf("%f ", primary_expression.double_constant);
1261       break;
1262
1263    case ast_int64_constant:
1264       printf("%" PRId64 " ", primary_expression.int64_constant);
1265       break;
1266
1267    case ast_uint64_constant:
1268       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1269       break;
1270
1271    case ast_bool_constant:
1272       printf("%s ",
1273              primary_expression.bool_constant
1274              ? "true" : "false");
1275       break;
1276
1277    case ast_sequence: {
1278       printf("( ");
1279       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1280          if (&ast->link != this->expressions.get_head())
1281             printf(", ");
1282
1283          ast->print();
1284       }
1285       printf(") ");
1286       break;
1287    }
1288
1289    case ast_aggregate: {
1290       printf("{ ");
1291       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1292          if (&ast->link != this->expressions.get_head())
1293             printf(", ");
1294
1295          ast->print();
1296       }
1297       printf("} ");
1298       break;
1299    }
1300
1301    default:
1302       assert(0);
1303       break;
1304    }
1305 }
1306
1307 ast_expression::ast_expression(int oper,
1308                                ast_expression *ex0,
1309                                ast_expression *ex1,
1310                                ast_expression *ex2) :
1311    primary_expression()
1312 {
1313    this->oper = ast_operators(oper);
1314    this->subexpressions[0] = ex0;
1315    this->subexpressions[1] = ex1;
1316    this->subexpressions[2] = ex2;
1317    this->non_lvalue_description = NULL;
1318    this->is_lhs = false;
1319 }
1320
1321
1322 void
1323 ast_expression_statement::print(void) const
1324 {
1325    if (expression)
1326       expression->print();
1327
1328    printf("; ");
1329 }
1330
1331
1332 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1333    expression(ex)
1334 {
1335    /* empty */
1336 }
1337
1338
1339 void
1340 ast_function::print(void) const
1341 {
1342    return_type->print();
1343    printf(" %s (", identifier);
1344
1345    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1346       ast->print();
1347    }
1348
1349    printf(")");
1350 }
1351
1352
1353 ast_function::ast_function(void)
1354    : return_type(NULL), identifier(NULL), is_definition(false),
1355      signature(NULL)
1356 {
1357    /* empty */
1358 }
1359
1360
1361 void
1362 ast_fully_specified_type::print(void) const
1363 {
1364    _mesa_ast_type_qualifier_print(& qualifier);
1365    specifier->print();
1366 }
1367
1368
1369 void
1370 ast_parameter_declarator::print(void) const
1371 {
1372    type->print();
1373    if (identifier)
1374       printf("%s ", identifier);
1375    ast_opt_array_dimensions_print(array_specifier);
1376 }
1377
1378
1379 void
1380 ast_function_definition::print(void) const
1381 {
1382    prototype->print();
1383    body->print();
1384 }
1385
1386
1387 void
1388 ast_declaration::print(void) const
1389 {
1390    printf("%s ", identifier);
1391    ast_opt_array_dimensions_print(array_specifier);
1392
1393    if (initializer) {
1394       printf("= ");
1395       initializer->print();
1396    }
1397 }
1398
1399
1400 ast_declaration::ast_declaration(const char *identifier,
1401                                  ast_array_specifier *array_specifier,
1402                                  ast_expression *initializer)
1403 {
1404    this->identifier = identifier;
1405    this->array_specifier = array_specifier;
1406    this->initializer = initializer;
1407 }
1408
1409
1410 void
1411 ast_declarator_list::print(void) const
1412 {
1413    assert(type || invariant);
1414
1415    if (type)
1416       type->print();
1417    else if (invariant)
1418       printf("invariant ");
1419    else
1420       printf("precise ");
1421
1422    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1423       if (&ast->link != this->declarations.get_head())
1424          printf(", ");
1425
1426       ast->print();
1427    }
1428
1429    printf("; ");
1430 }
1431
1432
1433 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1434 {
1435    this->type = type;
1436    this->invariant = false;
1437    this->precise = false;
1438 }
1439
1440 void
1441 ast_jump_statement::print(void) const
1442 {
1443    switch (mode) {
1444    case ast_continue:
1445       printf("continue; ");
1446       break;
1447    case ast_break:
1448       printf("break; ");
1449       break;
1450    case ast_return:
1451       printf("return ");
1452       if (opt_return_value)
1453          opt_return_value->print();
1454
1455       printf("; ");
1456       break;
1457    case ast_discard:
1458       printf("discard; ");
1459       break;
1460    }
1461 }
1462
1463
1464 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1465    : opt_return_value(NULL)
1466 {
1467    this->mode = ast_jump_modes(mode);
1468
1469    if (mode == ast_return)
1470       opt_return_value = return_value;
1471 }
1472
1473
1474 void
1475 ast_selection_statement::print(void) const
1476 {
1477    printf("if ( ");
1478    condition->print();
1479    printf(") ");
1480
1481    then_statement->print();
1482
1483    if (else_statement) {
1484       printf("else ");
1485       else_statement->print();
1486    }
1487 }
1488
1489
1490 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1491                                                  ast_node *then_statement,
1492                                                  ast_node *else_statement)
1493 {
1494    this->condition = condition;
1495    this->then_statement = then_statement;
1496    this->else_statement = else_statement;
1497 }
1498
1499
1500 void
1501 ast_switch_statement::print(void) const
1502 {
1503    printf("switch ( ");
1504    test_expression->print();
1505    printf(") ");
1506
1507    body->print();
1508 }
1509
1510
1511 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1512                                            ast_node *body)
1513 {
1514    this->test_expression = test_expression;
1515    this->body = body;
1516 }
1517
1518
1519 void
1520 ast_switch_body::print(void) const
1521 {
1522    printf("{\n");
1523    if (stmts != NULL) {
1524       stmts->print();
1525    }
1526    printf("}\n");
1527 }
1528
1529
1530 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1531 {
1532    this->stmts = stmts;
1533 }
1534
1535
1536 void ast_case_label::print(void) const
1537 {
1538    if (test_value != NULL) {
1539       printf("case ");
1540       test_value->print();
1541       printf(": ");
1542    } else {
1543       printf("default: ");
1544    }
1545 }
1546
1547
1548 ast_case_label::ast_case_label(ast_expression *test_value)
1549 {
1550    this->test_value = test_value;
1551 }
1552
1553
1554 void ast_case_label_list::print(void) const
1555 {
1556    foreach_list_typed(ast_node, ast, link, & this->labels) {
1557       ast->print();
1558    }
1559    printf("\n");
1560 }
1561
1562
1563 ast_case_label_list::ast_case_label_list(void)
1564 {
1565 }
1566
1567
1568 void ast_case_statement::print(void) const
1569 {
1570    labels->print();
1571    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1572       ast->print();
1573       printf("\n");
1574    }
1575 }
1576
1577
1578 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1579 {
1580    this->labels = labels;
1581 }
1582
1583
1584 void ast_case_statement_list::print(void) const
1585 {
1586    foreach_list_typed(ast_node, ast, link, & this->cases) {
1587       ast->print();
1588    }
1589 }
1590
1591
1592 ast_case_statement_list::ast_case_statement_list(void)
1593 {
1594 }
1595
1596
1597 void
1598 ast_iteration_statement::print(void) const
1599 {
1600    switch (mode) {
1601    case ast_for:
1602       printf("for( ");
1603       if (init_statement)
1604          init_statement->print();
1605       printf("; ");
1606
1607       if (condition)
1608          condition->print();
1609       printf("; ");
1610
1611       if (rest_expression)
1612          rest_expression->print();
1613       printf(") ");
1614
1615       body->print();
1616       break;
1617
1618    case ast_while:
1619       printf("while ( ");
1620       if (condition)
1621          condition->print();
1622       printf(") ");
1623       body->print();
1624       break;
1625
1626    case ast_do_while:
1627       printf("do ");
1628       body->print();
1629       printf("while ( ");
1630       if (condition)
1631          condition->print();
1632       printf("); ");
1633       break;
1634    }
1635 }
1636
1637
1638 ast_iteration_statement::ast_iteration_statement(int mode,
1639                                                  ast_node *init,
1640                                                  ast_node *condition,
1641                                                  ast_expression *rest_expression,
1642                                                  ast_node *body)
1643 {
1644    this->mode = ast_iteration_modes(mode);
1645    this->init_statement = init;
1646    this->condition = condition;
1647    this->rest_expression = rest_expression;
1648    this->body = body;
1649 }
1650
1651
1652 void
1653 ast_struct_specifier::print(void) const
1654 {
1655    printf("struct %s { ", name);
1656    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1657       ast->print();
1658    }
1659    printf("} ");
1660 }
1661
1662
1663 ast_struct_specifier::ast_struct_specifier(void *lin_ctx, const char *identifier,
1664                                            ast_declarator_list *declarator_list)
1665 {
1666    if (identifier == NULL) {
1667       static mtx_t mutex = _MTX_INITIALIZER_NP;
1668       static unsigned anon_count = 1;
1669       unsigned count;
1670
1671       mtx_lock(&mutex);
1672       count = anon_count++;
1673       mtx_unlock(&mutex);
1674
1675       identifier = linear_asprintf(lin_ctx, "#anon_struct_%04x", count);
1676    }
1677    name = identifier;
1678    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1679    is_declaration = true;
1680    layout = NULL;
1681 }
1682
1683 void ast_subroutine_list::print(void) const
1684 {
1685    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1686       if (&ast->link != this->declarations.get_head())
1687          printf(", ");
1688       ast->print();
1689    }
1690 }
1691
1692 static void
1693 set_shader_inout_layout(struct gl_shader *shader,
1694                      struct _mesa_glsl_parse_state *state)
1695 {
1696    /* Should have been prevented by the parser. */
1697    if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1698        shader->Stage == MESA_SHADER_VERTEX) {
1699       assert(!state->in_qualifier->flags.i);
1700    } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1701               shader->Stage != MESA_SHADER_TESS_EVAL) {
1702       assert(!state->in_qualifier->flags.i);
1703    }
1704
1705    if (shader->Stage != MESA_SHADER_COMPUTE) {
1706       /* Should have been prevented by the parser. */
1707       assert(!state->cs_input_local_size_specified);
1708       assert(!state->cs_input_local_size_variable_specified);
1709    }
1710
1711    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1712       /* Should have been prevented by the parser. */
1713       assert(!state->fs_uses_gl_fragcoord);
1714       assert(!state->fs_redeclares_gl_fragcoord);
1715       assert(!state->fs_pixel_center_integer);
1716       assert(!state->fs_origin_upper_left);
1717       assert(!state->fs_early_fragment_tests);
1718       assert(!state->fs_inner_coverage);
1719       assert(!state->fs_post_depth_coverage);
1720    }
1721
1722    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1723       if (state->out_qualifier->out_xfb_stride[i]) {
1724          unsigned xfb_stride;
1725          if (state->out_qualifier->out_xfb_stride[i]->
1726                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1727                 true)) {
1728             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1729          }
1730       }
1731    }
1732
1733    switch (shader->Stage) {
1734    case MESA_SHADER_TESS_CTRL:
1735       shader->info.TessCtrl.VerticesOut = 0;
1736       if (state->tcs_output_vertices_specified) {
1737          unsigned vertices;
1738          if (state->out_qualifier->vertices->
1739                process_qualifier_constant(state, "vertices", &vertices,
1740                                           false)) {
1741
1742             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1743             if (vertices > state->Const.MaxPatchVertices) {
1744                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1745                                 "GL_MAX_PATCH_VERTICES", vertices);
1746             }
1747             shader->info.TessCtrl.VerticesOut = vertices;
1748          }
1749       }
1750       break;
1751    case MESA_SHADER_TESS_EVAL:
1752       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1753       if (state->in_qualifier->flags.q.prim_type)
1754          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1755
1756       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1757       if (state->in_qualifier->flags.q.vertex_spacing)
1758          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1759
1760       shader->info.TessEval.VertexOrder = 0;
1761       if (state->in_qualifier->flags.q.ordering)
1762          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1763
1764       shader->info.TessEval.PointMode = -1;
1765       if (state->in_qualifier->flags.q.point_mode)
1766          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1767       break;
1768    case MESA_SHADER_GEOMETRY:
1769       shader->info.Geom.VerticesOut = -1;
1770       if (state->out_qualifier->flags.q.max_vertices) {
1771          unsigned qual_max_vertices;
1772          if (state->out_qualifier->max_vertices->
1773                process_qualifier_constant(state, "max_vertices",
1774                                           &qual_max_vertices, true)) {
1775
1776             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1777                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1778                _mesa_glsl_error(&loc, state,
1779                                 "maximum output vertices (%d) exceeds "
1780                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1781                                 qual_max_vertices);
1782             }
1783             shader->info.Geom.VerticesOut = qual_max_vertices;
1784          }
1785       }
1786
1787       if (state->gs_input_prim_type_specified) {
1788          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1789       } else {
1790          shader->info.Geom.InputType = PRIM_UNKNOWN;
1791       }
1792
1793       if (state->out_qualifier->flags.q.prim_type) {
1794          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1795       } else {
1796          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1797       }
1798
1799       shader->info.Geom.Invocations = 0;
1800       if (state->in_qualifier->flags.q.invocations) {
1801          unsigned invocations;
1802          if (state->in_qualifier->invocations->
1803                process_qualifier_constant(state, "invocations",
1804                                           &invocations, false)) {
1805
1806             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1807             if (invocations > MAX_GEOMETRY_SHADER_INVOCATIONS) {
1808                _mesa_glsl_error(&loc, state,
1809                                 "invocations (%d) exceeds "
1810                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1811                                 invocations);
1812             }
1813             shader->info.Geom.Invocations = invocations;
1814          }
1815       }
1816       break;
1817
1818    case MESA_SHADER_COMPUTE:
1819       if (state->cs_input_local_size_specified) {
1820          for (int i = 0; i < 3; i++)
1821             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1822       } else {
1823          for (int i = 0; i < 3; i++)
1824             shader->info.Comp.LocalSize[i] = 0;
1825       }
1826
1827       shader->info.Comp.LocalSizeVariable =
1828          state->cs_input_local_size_variable_specified;
1829       break;
1830
1831    case MESA_SHADER_FRAGMENT:
1832       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1833       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1834       shader->pixel_center_integer = state->fs_pixel_center_integer;
1835       shader->origin_upper_left = state->fs_origin_upper_left;
1836       shader->ARB_fragment_coord_conventions_enable =
1837          state->ARB_fragment_coord_conventions_enable;
1838       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1839       shader->InnerCoverage = state->fs_inner_coverage;
1840       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1841       shader->BlendSupport = state->fs_blend_support;
1842       break;
1843
1844    default:
1845       /* Nothing to do. */
1846       break;
1847    }
1848 }
1849
1850 extern "C" {
1851
1852 static void
1853 assign_subroutine_indexes(struct gl_shader *sh,
1854                           struct _mesa_glsl_parse_state *state)
1855 {
1856    int j, k;
1857    int index = 0;
1858
1859    for (j = 0; j < state->num_subroutines; j++) {
1860       while (state->subroutines[j]->subroutine_index == -1) {
1861          for (k = 0; k < state->num_subroutines; k++) {
1862             if (state->subroutines[k]->subroutine_index == index)
1863                break;
1864             else if (k == state->num_subroutines - 1) {
1865                state->subroutines[j]->subroutine_index = index;
1866             }
1867          }
1868          index++;
1869       }
1870    }
1871 }
1872
1873 static void
1874 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1875                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1876                     struct glcpp_parser *data,
1877                     unsigned version,
1878                     bool es)
1879 {
1880    unsigned gl_version = state->ctx->Extensions.Version;
1881    gl_api api = state->ctx->API;
1882
1883    if (gl_version != 0xff) {
1884       unsigned i;
1885       for (i = 0; i < state->num_supported_versions; i++) {
1886          if (state->supported_versions[i].ver == version &&
1887              state->supported_versions[i].es == es) {
1888             gl_version = state->supported_versions[i].gl_ver;
1889             break;
1890          }
1891       }
1892
1893       if (i == state->num_supported_versions)
1894          return;
1895    }
1896
1897    if (es)
1898       api = API_OPENGLES2;
1899
1900    for (unsigned i = 0;
1901         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
1902       const _mesa_glsl_extension *extension
1903          = &_mesa_glsl_supported_extensions[i];
1904       if (extension->compatible_with_state(state, api, gl_version)) {
1905          add_builtin_define(data, extension->name, 1);
1906       }
1907    }
1908 }
1909
1910 /* Implements parsing checks that we can't do during parsing */
1911 static void
1912 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
1913 {
1914    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
1915       YYLTYPE loc;
1916       memset(&loc, 0, sizeof(loc));
1917       _mesa_glsl_error(&loc, state, "Compute shaders require "
1918                        "GLSL 4.30 or GLSL ES 3.10");
1919    }
1920 }
1921
1922 void
1923 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
1924                           bool dump_ast, bool dump_hir, bool force_recompile)
1925 {
1926    struct _mesa_glsl_parse_state *state =
1927       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
1928    const char *source = shader->Source;
1929
1930    if (ctx->Const.GenerateTemporaryNames)
1931       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
1932                               false, true);
1933
1934    state->error = glcpp_preprocess(state, &source, &state->info_log,
1935                              add_builtin_defines, state, ctx);
1936
1937    if (!state->error) {
1938      _mesa_glsl_lexer_ctor(state, source);
1939      _mesa_glsl_parse(state);
1940      _mesa_glsl_lexer_dtor(state);
1941      do_late_parsing_checks(state);
1942    }
1943
1944    if (dump_ast) {
1945       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
1946          ast->print();
1947       }
1948       printf("\n\n");
1949    }
1950
1951    ralloc_free(shader->ir);
1952    shader->ir = new(shader) exec_list;
1953    if (!state->error && !state->translation_unit.is_empty())
1954       _mesa_ast_to_hir(shader->ir, state);
1955
1956    if (!state->error) {
1957       validate_ir_tree(shader->ir);
1958
1959       /* Print out the unoptimized IR. */
1960       if (dump_hir) {
1961          _mesa_print_ir(stdout, shader->ir, state);
1962       }
1963    }
1964
1965
1966    if (!state->error && !shader->ir->is_empty()) {
1967       struct gl_shader_compiler_options *options =
1968          &ctx->Const.ShaderCompilerOptions[shader->Stage];
1969
1970       assign_subroutine_indexes(shader, state);
1971       lower_subroutine(shader->ir, state);
1972
1973       /* Do some optimization at compile time to reduce shader IR size
1974        * and reduce later work if the same shader is linked multiple times
1975        */
1976       if (ctx->Const.GLSLOptimizeConservatively) {
1977          /* Run it just once. */
1978          do_common_optimization(shader->ir, false, false, options,
1979                                 ctx->Const.NativeIntegers);
1980       } else {
1981          /* Repeat it until it stops making changes. */
1982          while (do_common_optimization(shader->ir, false, false, options,
1983                                        ctx->Const.NativeIntegers))
1984             ;
1985       }
1986
1987       validate_ir_tree(shader->ir);
1988
1989       enum ir_variable_mode other;
1990       switch (shader->Stage) {
1991       case MESA_SHADER_VERTEX:
1992          other = ir_var_shader_in;
1993          break;
1994       case MESA_SHADER_FRAGMENT:
1995          other = ir_var_shader_out;
1996          break;
1997       default:
1998          /* Something invalid to ensure optimize_dead_builtin_uniforms
1999           * doesn't remove anything other than uniforms or constants.
2000           */
2001          other = ir_var_mode_count;
2002          break;
2003       }
2004
2005       optimize_dead_builtin_variables(shader->ir, other);
2006
2007       validate_ir_tree(shader->ir);
2008    }
2009
2010    if (shader->InfoLog)
2011       ralloc_free(shader->InfoLog);
2012
2013    if (!state->error)
2014       set_shader_inout_layout(shader, state);
2015
2016    shader->symbols = new(shader->ir) glsl_symbol_table;
2017    shader->CompileStatus = !state->error;
2018    shader->InfoLog = state->info_log;
2019    shader->Version = state->language_version;
2020    shader->IsES = state->es_shader;
2021
2022    /* Retain any live IR, but trash the rest. */
2023    reparent_ir(shader->ir, shader->ir);
2024
2025    /* Destroy the symbol table.  Create a new symbol table that contains only
2026     * the variables and functions that still exist in the IR.  The symbol
2027     * table will be used later during linking.
2028     *
2029     * There must NOT be any freed objects still referenced by the symbol
2030     * table.  That could cause the linker to dereference freed memory.
2031     *
2032     * We don't have to worry about types or interface-types here because those
2033     * are fly-weights that are looked up by glsl_type.
2034     */
2035    foreach_in_list (ir_instruction, ir, shader->ir) {
2036       switch (ir->ir_type) {
2037       case ir_type_function:
2038          shader->symbols->add_function((ir_function *) ir);
2039          break;
2040       case ir_type_variable: {
2041          ir_variable *const var = (ir_variable *) ir;
2042
2043          if (var->data.mode != ir_var_temporary)
2044             shader->symbols->add_variable(var);
2045          break;
2046       }
2047       default:
2048          break;
2049       }
2050    }
2051
2052    _mesa_glsl_initialize_derived_variables(ctx, shader);
2053
2054    delete state->symbols;
2055    ralloc_free(state);
2056 }
2057
2058 } /* extern "C" */
2059 /**
2060  * Do the set of common optimizations passes
2061  *
2062  * \param ir                          List of instructions to be optimized
2063  * \param linked                      Is the shader linked?  This enables
2064  *                                    optimizations passes that remove code at
2065  *                                    global scope and could cause linking to
2066  *                                    fail.
2067  * \param uniform_locations_assigned  Have locations already been assigned for
2068  *                                    uniforms?  This prevents the declarations
2069  *                                    of unused uniforms from being removed.
2070  *                                    The setting of this flag only matters if
2071  *                                    \c linked is \c true.
2072  * \param options                     The driver's preferred shader options.
2073  * \param native_integers             Selects optimizations that depend on the
2074  *                                    implementations supporting integers
2075  *                                    natively (as opposed to supporting
2076  *                                    integers in floating point registers).
2077  */
2078 bool
2079 do_common_optimization(exec_list *ir, bool linked,
2080                        bool uniform_locations_assigned,
2081                        const struct gl_shader_compiler_options *options,
2082                        bool native_integers)
2083 {
2084    const bool debug = false;
2085    GLboolean progress = GL_FALSE;
2086
2087 #define OPT(PASS, ...) do {                                             \
2088       if (debug) {                                                      \
2089          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2090          const bool opt_progress = PASS(__VA_ARGS__);                   \
2091          progress = opt_progress || progress;                           \
2092          if (opt_progress)                                              \
2093             _mesa_print_ir(stderr, ir, NULL);                           \
2094          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2095                  #PASS, opt_progress ? "made" : "no");                  \
2096       } else {                                                          \
2097          progress = PASS(__VA_ARGS__) || progress;                      \
2098       }                                                                 \
2099    } while (false)
2100
2101    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2102
2103    if (linked) {
2104       OPT(do_function_inlining, ir);
2105       OPT(do_dead_functions, ir);
2106       OPT(do_structure_splitting, ir);
2107    }
2108    propagate_invariance(ir);
2109    OPT(do_if_simplification, ir);
2110    OPT(opt_flatten_nested_if_blocks, ir);
2111    OPT(opt_conditional_discard, ir);
2112    OPT(do_copy_propagation, ir);
2113    OPT(do_copy_propagation_elements, ir);
2114
2115    if (options->OptimizeForAOS && !linked)
2116       OPT(opt_flip_matrices, ir);
2117
2118    if (linked && options->OptimizeForAOS) {
2119       OPT(do_vectorize, ir);
2120    }
2121
2122    if (linked)
2123       OPT(do_dead_code, ir, uniform_locations_assigned);
2124    else
2125       OPT(do_dead_code_unlinked, ir);
2126    OPT(do_dead_code_local, ir);
2127    OPT(do_tree_grafting, ir);
2128    OPT(do_constant_propagation, ir);
2129    if (linked)
2130       OPT(do_constant_variable, ir);
2131    else
2132       OPT(do_constant_variable_unlinked, ir);
2133    OPT(do_constant_folding, ir);
2134    OPT(do_minmax_prune, ir);
2135    OPT(do_rebalance_tree, ir);
2136    OPT(do_algebraic, ir, native_integers, options);
2137    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2138        options->EmitNoCont, options->EmitNoLoops);
2139    OPT(do_vec_index_to_swizzle, ir);
2140    OPT(lower_vector_insert, ir, false);
2141    OPT(do_swizzle_swizzle, ir);
2142    OPT(do_noop_swizzle, ir);
2143
2144    OPT(optimize_split_arrays, ir, linked);
2145    OPT(optimize_redundant_jumps, ir);
2146
2147    if (options->MaxUnrollIterations) {
2148       loop_state *ls = analyze_loop_variables(ir);
2149       if (ls->loop_found) {
2150          OPT(set_loop_controls, ir, ls);
2151          OPT(unroll_loops, ir, ls, options);
2152       }
2153       delete ls;
2154    }
2155
2156 #undef OPT
2157
2158    return progress;
2159 }
2160
2161 extern "C" {
2162
2163 /**
2164  * To be called at GL teardown time, this frees compiler datastructures.
2165  *
2166  * After calling this, any previously compiled shaders and shader
2167  * programs would be invalid.  So this should happen at approximately
2168  * program exit.
2169  */
2170 void
2171 _mesa_destroy_shader_compiler(void)
2172 {
2173    _mesa_destroy_shader_compiler_caches();
2174
2175    _mesa_glsl_release_types();
2176 }
2177
2178 /**
2179  * Releases compiler caches to trade off performance for memory.
2180  *
2181  * Intended to be used with glReleaseShaderCompiler().
2182  */
2183 void
2184 _mesa_destroy_shader_compiler_caches(void)
2185 {
2186    _mesa_glsl_release_builtin_functions();
2187 }
2188
2189 }