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 "util/disk_cache.h"
  37 #include "util/mesa-sha1.h"
  38 #include "ast.h"
  39 #include "glsl_parser_extras.h"
  40 #include "glsl_parser.h"
  41 #include "ir_optimization.h"
  42 #include "loop_analysis.h"
  43 #include "builtin_functions.h"
  44
  45 /**
  46  * Format a short human-readable description of the given GLSL version.
  47  */
  48 const char *
  49 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
  50 {
  51    return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
  52                           version / 100, version % 100);
  53 }
  54
  55
  56 static const unsigned known_desktop_glsl_versions[] =
  57    { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450 };
  58 static const unsigned known_desktop_gl_versions[] =
  59    {  20,  21,  30,  31,  32,  33,  40,  41,  42,  43,  44,  45 };
  60
  61
  62 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
  63                                                gl_shader_stage stage,
  64                                                void *mem_ctx)
  65    : ctx(_ctx), cs_input_local_size_specified(false), cs_input_local_size(),
  66      switch_state()
  67 {
  68    assert(stage < MESA_SHADER_STAGES);
  69    this->stage = stage;
  70
  71    this->scanner = NULL;
  72    this->translation_unit.make_empty();
  73    this->symbols = new(mem_ctx) glsl_symbol_table;
  74
  75    this->linalloc = linear_alloc_parent(this, 0);
  76
  77    this->info_log = ralloc_strdup(mem_ctx, "");
  78    this->error = false;
  79    this->loop_nesting_ast = NULL;
  80
  81    this->uses_builtin_functions = false;
  82
  83    /* Set default language version and extensions */
  84    this->language_version = 110;
  85    this->forced_language_version = ctx->Const.ForceGLSLVersion;
  86    this->zero_init = ctx->Const.GLSLZeroInit;
  87    this->gl_version = 20;
  88    this->compat_shader = true;
  89    this->es_shader = false;
  90    this->ARB_texture_rectangle_enable = true;
  91
  92    /* OpenGL ES 2.0 has different defaults from desktop GL. */
  93    if (ctx->API == API_OPENGLES2) {
  94       this->language_version = 100;
  95       this->es_shader = true;
  96       this->ARB_texture_rectangle_enable = false;
  97    }
  98
  99    this->extensions = &ctx->Extensions;
 100
 101    this->Const.MaxLights = ctx->Const.MaxLights;
 102    this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
 103    this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
 104    this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
 105    this->Const.MaxVertexAttribs = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs;
 106    this->Const.MaxVertexUniformComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxUniformComponents;
 107    this->Const.MaxVertexTextureImageUnits = ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits;
 108    this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
 109    this->Const.MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
 110    this->Const.MaxFragmentUniformComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxUniformComponents;
 111    this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset;
 112    this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset;
 113
 114    this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
 115
 116    this->Const.MaxDualSourceDrawBuffers = ctx->Const.MaxDualSourceDrawBuffers;
 117
 118    /* 1.50 constants */
 119    this->Const.MaxVertexOutputComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents;
 120    this->Const.MaxGeometryInputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxInputComponents;
 121    this->Const.MaxGeometryOutputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxOutputComponents;
 122    this->Const.MaxFragmentInputComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents;
 123    this->Const.MaxGeometryTextureImageUnits = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits;
 124    this->Const.MaxGeometryOutputVertices = ctx->Const.MaxGeometryOutputVertices;
 125    this->Const.MaxGeometryTotalOutputComponents = ctx->Const.MaxGeometryTotalOutputComponents;
 126    this->Const.MaxGeometryUniformComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxUniformComponents;
 127
 128    this->Const.MaxVertexAtomicCounters = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicCounters;
 129    this->Const.MaxTessControlAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters;
 130    this->Const.MaxTessEvaluationAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicCounters;
 131    this->Const.MaxGeometryAtomicCounters = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicCounters;
 132    this->Const.MaxFragmentAtomicCounters = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
 133    this->Const.MaxComputeAtomicCounters = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicCounters;
 134    this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
 135    this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
 136    this->Const.MaxVertexAtomicCounterBuffers =
 137       ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicBuffers;
 138    this->Const.MaxTessControlAtomicCounterBuffers =
 139       ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers;
 140    this->Const.MaxTessEvaluationAtomicCounterBuffers =
 141       ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers;
 142    this->Const.MaxGeometryAtomicCounterBuffers =
 143       ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers;
 144    this->Const.MaxFragmentAtomicCounterBuffers =
 145       ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
 146    this->Const.MaxComputeAtomicCounterBuffers =
 147       ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers;
 148    this->Const.MaxCombinedAtomicCounterBuffers =
 149       ctx->Const.MaxCombinedAtomicBuffers;
 150    this->Const.MaxAtomicCounterBufferSize =
 151       ctx->Const.MaxAtomicBufferSize;
 152
 153    /* ARB_enhanced_layouts constants */
 154    this->Const.MaxTransformFeedbackBuffers = ctx->Const.MaxTransformFeedbackBuffers;
 155    this->Const.MaxTransformFeedbackInterleavedComponents = ctx->Const.MaxTransformFeedbackInterleavedComponents;
 156
 157    /* Compute shader constants */
 158    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupCount); i++)
 159       this->Const.MaxComputeWorkGroupCount[i] = ctx->Const.MaxComputeWorkGroupCount[i];
 160    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupSize); i++)
 161       this->Const.MaxComputeWorkGroupSize[i] = ctx->Const.MaxComputeWorkGroupSize[i];
 162
 163    this->Const.MaxComputeTextureImageUnits = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
 164    this->Const.MaxComputeUniformComponents = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxUniformComponents;
 165
 166    this->Const.MaxImageUnits = ctx->Const.MaxImageUnits;
 167    this->Const.MaxCombinedShaderOutputResources = ctx->Const.MaxCombinedShaderOutputResources;
 168    this->Const.MaxImageSamples = ctx->Const.MaxImageSamples;
 169    this->Const.MaxVertexImageUniforms = ctx->Const.Program[MESA_SHADER_VERTEX].MaxImageUniforms;
 170    this->Const.MaxTessControlImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms;
 171    this->Const.MaxTessEvaluationImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms;
 172    this->Const.MaxGeometryImageUniforms = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxImageUniforms;
 173    this->Const.MaxFragmentImageUniforms = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxImageUniforms;
 174    this->Const.MaxComputeImageUniforms = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
 175    this->Const.MaxCombinedImageUniforms = ctx->Const.MaxCombinedImageUniforms;
 176
 177    /* ARB_viewport_array */
 178    this->Const.MaxViewports = ctx->Const.MaxViewports;
 179
 180    /* tessellation shader constants */
 181    this->Const.MaxPatchVertices = ctx->Const.MaxPatchVertices;
 182    this->Const.MaxTessGenLevel = ctx->Const.MaxTessGenLevel;
 183    this->Const.MaxTessControlInputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents;
 184    this->Const.MaxTessControlOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents;
 185    this->Const.MaxTessControlTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits;
 186    this->Const.MaxTessEvaluationInputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents;
 187    this->Const.MaxTessEvaluationOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents;
 188    this->Const.MaxTessEvaluationTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits;
 189    this->Const.MaxTessPatchComponents = ctx->Const.MaxTessPatchComponents;
 190    this->Const.MaxTessControlTotalOutputComponents = ctx->Const.MaxTessControlTotalOutputComponents;
 191    this->Const.MaxTessControlUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents;
 192    this->Const.MaxTessEvaluationUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents;
 193
 194    /* GL 4.5 / OES_sample_variables */
 195    this->Const.MaxSamples = ctx->Const.MaxSamples;
 196
 197    this->current_function = NULL;
 198    this->toplevel_ir = NULL;
 199    this->found_return = false;
 200    this->all_invariant = false;
 201    this->user_structures = NULL;
 202    this->num_user_structures = 0;
 203    this->num_subroutines = 0;
 204    this->subroutines = NULL;
 205    this->num_subroutine_types = 0;
 206    this->subroutine_types = NULL;
 207
 208    /* supported_versions should be large enough to support the known desktop
 209     * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
 210     */
 211    STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 4) ==
 212                  ARRAY_SIZE(this->supported_versions));
 213
 214    /* Populate the list of supported GLSL versions */
 215    /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
 216     * the OpenGL 3.2 Core context is supported, this logic will need
 217     * change.  Older versions of GLSL are no longer supported
 218     * outside the compatibility contexts of 3.x.
 219     */
 220    this->num_supported_versions = 0;
 221    if (_mesa_is_desktop_gl(ctx)) {
 222       for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
 223          if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
 224             this->supported_versions[this->num_supported_versions].ver
 225                = known_desktop_glsl_versions[i];
 226             this->supported_versions[this->num_supported_versions].gl_ver
 227                = known_desktop_gl_versions[i];
 228             this->supported_versions[this->num_supported_versions].es = false;
 229             this->num_supported_versions++;
 230          }
 231       }
 232    }
 233    if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
 234       this->supported_versions[this->num_supported_versions].ver = 100;
 235       this->supported_versions[this->num_supported_versions].gl_ver = 20;
 236       this->supported_versions[this->num_supported_versions].es = true;
 237       this->num_supported_versions++;
 238    }
 239    if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
 240       this->supported_versions[this->num_supported_versions].ver = 300;
 241       this->supported_versions[this->num_supported_versions].gl_ver = 30;
 242       this->supported_versions[this->num_supported_versions].es = true;
 243       this->num_supported_versions++;
 244    }
 245    if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
 246       this->supported_versions[this->num_supported_versions].ver = 310;
 247       this->supported_versions[this->num_supported_versions].gl_ver = 31;
 248       this->supported_versions[this->num_supported_versions].es = true;
 249       this->num_supported_versions++;
 250    }
 251    if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
 252        ctx->Extensions.ARB_ES3_2_compatibility) {
 253       this->supported_versions[this->num_supported_versions].ver = 320;
 254       this->supported_versions[this->num_supported_versions].gl_ver = 32;
 255       this->supported_versions[this->num_supported_versions].es = true;
 256       this->num_supported_versions++;
 257    }
 258
 259    /* Create a string for use in error messages to tell the user which GLSL
 260     * versions are supported.
 261     */
 262    char *supported = ralloc_strdup(this, "");
 263    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 264       unsigned ver = this->supported_versions[i].ver;
 265       const char *const prefix = (i == 0)
 266          ? ""
 267          : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
 268       const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
 269
 270       ralloc_asprintf_append(& supported, "%s%u.%02u%s",
 271                              prefix,
 272                              ver / 100, ver % 100,
 273                              suffix);
 274    }
 275
 276    this->supported_version_string = supported;
 277
 278    if (ctx->Const.ForceGLSLExtensionsWarn)
 279       _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
 280
 281    this->default_uniform_qualifier = new(this) ast_type_qualifier();
 282    this->default_uniform_qualifier->flags.q.shared = 1;
 283    this->default_uniform_qualifier->flags.q.column_major = 1;
 284
 285    this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
 286    this->default_shader_storage_qualifier->flags.q.shared = 1;
 287    this->default_shader_storage_qualifier->flags.q.column_major = 1;
 288
 289    this->fs_uses_gl_fragcoord = false;
 290    this->fs_redeclares_gl_fragcoord = false;
 291    this->fs_origin_upper_left = false;
 292    this->fs_pixel_center_integer = false;
 293    this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
 294
 295    this->gs_input_prim_type_specified = false;
 296    this->tcs_output_vertices_specified = false;
 297    this->gs_input_size = 0;
 298    this->in_qualifier = new(this) ast_type_qualifier();
 299    this->out_qualifier = new(this) ast_type_qualifier();
 300    this->fs_early_fragment_tests = false;
 301    this->fs_inner_coverage = false;
 302    this->fs_post_depth_coverage = false;
 303    this->fs_blend_support = 0;
 304    memset(this->atomic_counter_offsets, 0,
 305           sizeof(this->atomic_counter_offsets));
 306    this->allow_extension_directive_midshader =
 307       ctx->Const.AllowGLSLExtensionDirectiveMidShader;
 308
 309    this->cs_input_local_size_variable_specified = false;
 310 }
 311
 312 /**
 313  * Determine whether the current GLSL version is sufficiently high to support
 314  * a certain feature, and generate an error message if it isn't.
 315  *
 316  * \param required_glsl_version and \c required_glsl_es_version are
 317  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 318  *
 319  * \param locp is the parser location where the error should be reported.
 320  *
 321  * \param fmt (and additional arguments) constitute a printf-style error
 322  * message to report if the version check fails.  Information about the
 323  * current and required GLSL versions will be appended.  So, for example, if
 324  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 325  * "foo unsupported") is called, the error message will be "foo unsupported in
 326  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 327  */
 328 bool
 329 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 330                                       unsigned required_glsl_es_version,
 331                                       YYLTYPE *locp, const char *fmt, ...)
 332 {
 333    if (this->is_version(required_glsl_version, required_glsl_es_version))
 334       return true;
 335
 336    va_list args;
 337    va_start(args, fmt);
 338    char *problem = ralloc_vasprintf(this, fmt, args);
 339    va_end(args);
 340    const char *glsl_version_string
 341       = glsl_compute_version_string(this, false, required_glsl_version);
 342    const char *glsl_es_version_string
 343       = glsl_compute_version_string(this, true, required_glsl_es_version);
 344    const char *requirement_string = "";
 345    if (required_glsl_version && required_glsl_es_version) {
 346       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 347                                            glsl_version_string,
 348                                            glsl_es_version_string);
 349    } else if (required_glsl_version) {
 350       requirement_string = ralloc_asprintf(this, " (%s required)",
 351                                            glsl_version_string);
 352    } else if (required_glsl_es_version) {
 353       requirement_string = ralloc_asprintf(this, " (%s required)",
 354                                            glsl_es_version_string);
 355    }
 356    _mesa_glsl_error(locp, this, "%s in %s%s",
 357                     problem, this->get_version_string(),
 358                     requirement_string);
 359
 360    return false;
 361 }
 362
 363 /**
 364  * Process a GLSL #version directive.
 365  *
 366  * \param version is the integer that follows the #version token.
 367  *
 368  * \param ident is a string identifier that follows the integer, if any is
 369  * present.  Otherwise NULL.
 370  */
 371 void
 372 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 373                                                   const char *ident)
 374 {
 375    bool es_token_present = false;
 376    bool compat_token_present = false;
 377    if (ident) {
 378       if (strcmp(ident, "es") == 0) {
 379          es_token_present = true;
 380       } else if (version >= 150) {
 381          if (strcmp(ident, "core") == 0) {
 382             /* Accept the token.  There's no need to record that this is
 383              * a core profile shader since that's the only profile we support.
 384              */
 385          } else if (strcmp(ident, "compatibility") == 0) {
 386             compat_token_present = true;
 387
 388             if (this->ctx->API != API_OPENGL_COMPAT) {
 389                _mesa_glsl_error(locp, this,
 390                                 "the compatibility profile is not supported");
 391             }
 392          } else {
 393             _mesa_glsl_error(locp, this,
 394                              "\"%s\" is not a valid shading language profile; "
 395                              "if present, it must be \"core\"", ident);
 396          }
 397       } else {
 398          _mesa_glsl_error(locp, this,
 399                           "illegal text following version number");
 400       }
 401    }
 402
 403    this->es_shader = es_token_present;
 404    if (version == 100) {
 405       if (es_token_present) {
 406          _mesa_glsl_error(locp, this,
 407                           "GLSL 1.00 ES should be selected using "
 408                           "`#version 100'");
 409       } else {
 410          this->es_shader = true;
 411       }
 412    }
 413
 414    if (this->es_shader) {
 415       this->ARB_texture_rectangle_enable = false;
 416    }
 417
 418    if (this->forced_language_version)
 419       this->language_version = this->forced_language_version;
 420    else
 421       this->language_version = version;
 422
 423    this->compat_shader = compat_token_present ||
 424                          (!this->es_shader && this->language_version < 140);
 425
 426    bool supported = false;
 427    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 428       if (this->supported_versions[i].ver == this->language_version
 429           && this->supported_versions[i].es == this->es_shader) {
 430          this->gl_version = this->supported_versions[i].gl_ver;
 431          supported = true;
 432          break;
 433       }
 434    }
 435
 436    if (!supported) {
 437       _mesa_glsl_error(locp, this, "%s is not supported. "
 438                        "Supported versions are: %s",
 439                        this->get_version_string(),
 440                        this->supported_version_string);
 441
 442       /* On exit, the language_version must be set to a valid value.
 443        * Later calls to _mesa_glsl_initialize_types will misbehave if
 444        * the version is invalid.
 445        */
 446       switch (this->ctx->API) {
 447       case API_OPENGL_COMPAT:
 448       case API_OPENGL_CORE:
 449          this->language_version = this->ctx->Const.GLSLVersion;
 450          break;
 451
 452       case API_OPENGLES:
 453          assert(!"Should not get here.");
 454          /* FALLTHROUGH */
 455
 456       case API_OPENGLES2:
 457          this->language_version = 100;
 458          break;
 459       }
 460    }
 461 }
 462
 463
 464 /* This helper function will append the given message to the shader's
 465    info log and report it via GL_ARB_debug_output. Per that extension,
 466    'type' is one of the enum values classifying the message, and
 467    'id' is the implementation-defined ID of the given message. */
 468 static void
 469 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 470                GLenum type, const char *fmt, va_list ap)
 471 {
 472    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 473    GLuint msg_id = 0;
 474
 475    assert(state->info_log != NULL);
 476
 477    /* Get the offset that the new message will be written to. */
 478    int msg_offset = strlen(state->info_log);
 479
 480    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 481                                             locp->source,
 482                                             locp->first_line,
 483                                             locp->first_column,
 484                                             error ? "error" : "warning");
 485    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 486
 487    const char *const msg = &state->info_log[msg_offset];
 488    struct gl_context *ctx = state->ctx;
 489
 490    /* Report the error via GL_ARB_debug_output. */
 491    _mesa_shader_debug(ctx, type, &msg_id, msg);
 492
 493    ralloc_strcat(&state->info_log, "\n");
 494 }
 495
 496 void
 497 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 498                  const char *fmt, ...)
 499 {
 500    va_list ap;
 501
 502    state->error = true;
 503
 504    va_start(ap, fmt);
 505    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 506    va_end(ap);
 507 }
 508
 509
 510 void
 511 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 512                    const char *fmt, ...)
 513 {
 514    va_list ap;
 515
 516    va_start(ap, fmt);
 517    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 518    va_end(ap);
 519 }
 520
 521
 522 /**
 523  * Enum representing the possible behaviors that can be specified in
 524  * an #extension directive.
 525  */
 526 enum ext_behavior {
 527    extension_disable,
 528    extension_enable,
 529    extension_require,
 530    extension_warn
 531 };
 532
 533 /**
 534  * Element type for _mesa_glsl_supported_extensions
 535  */
 536 struct _mesa_glsl_extension {
 537    /**
 538     * Name of the extension when referred to in a GLSL extension
 539     * statement
 540     */
 541    const char *name;
 542
 543    /**
 544     * Whether this extension is a part of AEP
 545     */
 546    bool aep;
 547
 548    /**
 549     * Predicate that checks whether the relevant extension is available for
 550     * this context.
 551     */
 552    bool (*available_pred)(const struct gl_context *,
 553                           gl_api api, uint8_t version);
 554
 555    /**
 556     * Flag in the _mesa_glsl_parse_state struct that should be set
 557     * when this extension is enabled.
 558     *
 559     * See note in _mesa_glsl_extension::supported_flag about "pointer
 560     * to member" types.
 561     */
 562    bool _mesa_glsl_parse_state::* enable_flag;
 563
 564    /**
 565     * Flag in the _mesa_glsl_parse_state struct that should be set
 566     * when the shader requests "warn" behavior for this extension.
 567     *
 568     * See note in _mesa_glsl_extension::supported_flag about "pointer
 569     * to member" types.
 570     */
 571    bool _mesa_glsl_parse_state::* warn_flag;
 572
 573
 574    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 575                               gl_api api, uint8_t gl_version) const;
 576    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 577 };
 578
 579 /** Checks if the context supports a user-facing extension */
 580 #define EXT(name_str, driver_cap, ...) \
 581 static MAYBE_UNUSED bool \
 582 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 583 { \
 584    return ctx->Extensions.driver_cap && (version >= \
 585           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 586 }
 587 #include "main/extensions_table.h"
 588 #undef EXT
 589
 590 #define EXT(NAME)                                           \
 591    { "GL_" #NAME, false, has_##NAME,                        \
 592      &_mesa_glsl_parse_state::NAME##_enable,                \
 593      &_mesa_glsl_parse_state::NAME##_warn }
 594
 595 #define EXT_AEP(NAME)                                       \
 596    { "GL_" #NAME, true, has_##NAME,                         \
 597      &_mesa_glsl_parse_state::NAME##_enable,                \
 598      &_mesa_glsl_parse_state::NAME##_warn }
 599
 600 /**
 601  * Table of extensions that can be enabled/disabled within a shader,
 602  * and the conditions under which they are supported.
 603  */
 604 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 605    /* ARB extensions go here, sorted alphabetically.
 606     */
 607    EXT(ARB_ES3_1_compatibility),
 608    EXT(ARB_ES3_2_compatibility),
 609    EXT(ARB_arrays_of_arrays),
 610    EXT(ARB_compute_shader),
 611    EXT(ARB_compute_variable_group_size),
 612    EXT(ARB_conservative_depth),
 613    EXT(ARB_cull_distance),
 614    EXT(ARB_derivative_control),
 615    EXT(ARB_draw_buffers),
 616    EXT(ARB_draw_instanced),
 617    EXT(ARB_enhanced_layouts),
 618    EXT(ARB_explicit_attrib_location),
 619    EXT(ARB_explicit_uniform_location),
 620    EXT(ARB_fragment_coord_conventions),
 621    EXT(ARB_fragment_layer_viewport),
 622    EXT(ARB_gpu_shader5),
 623    EXT(ARB_gpu_shader_fp64),
 624    EXT(ARB_gpu_shader_int64),
 625    EXT(ARB_post_depth_coverage),
 626    EXT(ARB_sample_shading),
 627    EXT(ARB_separate_shader_objects),
 628    EXT(ARB_shader_atomic_counter_ops),
 629    EXT(ARB_shader_atomic_counters),
 630    EXT(ARB_shader_bit_encoding),
 631    EXT(ARB_shader_clock),
 632    EXT(ARB_shader_draw_parameters),
 633    EXT(ARB_shader_group_vote),
 634    EXT(ARB_shader_image_load_store),
 635    EXT(ARB_shader_image_size),
 636    EXT(ARB_shader_precision),
 637    EXT(ARB_shader_stencil_export),
 638    EXT(ARB_shader_storage_buffer_object),
 639    EXT(ARB_shader_subroutine),
 640    EXT(ARB_shader_texture_image_samples),
 641    EXT(ARB_shader_texture_lod),
 642    EXT(ARB_shader_viewport_layer_array),
 643    EXT(ARB_shading_language_420pack),
 644    EXT(ARB_shading_language_packing),
 645    EXT(ARB_tessellation_shader),
 646    EXT(ARB_texture_cube_map_array),
 647    EXT(ARB_texture_gather),
 648    EXT(ARB_texture_multisample),
 649    EXT(ARB_texture_query_levels),
 650    EXT(ARB_texture_query_lod),
 651    EXT(ARB_texture_rectangle),
 652    EXT(ARB_uniform_buffer_object),
 653    EXT(ARB_vertex_attrib_64bit),
 654    EXT(ARB_viewport_array),
 655
 656    /* KHR extensions go here, sorted alphabetically.
 657     */
 658    EXT_AEP(KHR_blend_equation_advanced),
 659
 660    /* OES extensions go here, sorted alphabetically.
 661     */
 662    EXT(OES_EGL_image_external),
 663    EXT(OES_geometry_point_size),
 664    EXT(OES_geometry_shader),
 665    EXT(OES_gpu_shader5),
 666    EXT(OES_primitive_bounding_box),
 667    EXT_AEP(OES_sample_variables),
 668    EXT_AEP(OES_shader_image_atomic),
 669    EXT(OES_shader_io_blocks),
 670    EXT_AEP(OES_shader_multisample_interpolation),
 671    EXT(OES_standard_derivatives),
 672    EXT(OES_tessellation_point_size),
 673    EXT(OES_tessellation_shader),
 674    EXT(OES_texture_3D),
 675    EXT(OES_texture_buffer),
 676    EXT(OES_texture_cube_map_array),
 677    EXT_AEP(OES_texture_storage_multisample_2d_array),
 678    EXT(OES_viewport_array),
 679
 680    /* All other extensions go here, sorted alphabetically.
 681     */
 682    EXT(AMD_conservative_depth),
 683    EXT(AMD_shader_stencil_export),
 684    EXT(AMD_shader_trinary_minmax),
 685    EXT(AMD_vertex_shader_layer),
 686    EXT(AMD_vertex_shader_viewport_index),
 687    EXT(ANDROID_extension_pack_es31a),
 688    EXT(EXT_blend_func_extended),
 689    EXT(EXT_frag_depth),
 690    EXT(EXT_draw_buffers),
 691    EXT(EXT_clip_cull_distance),
 692    EXT(EXT_geometry_point_size),
 693    EXT_AEP(EXT_geometry_shader),
 694    EXT_AEP(EXT_gpu_shader5),
 695    EXT_AEP(EXT_primitive_bounding_box),
 696    EXT(EXT_separate_shader_objects),
 697    EXT(EXT_shader_framebuffer_fetch),
 698    EXT(EXT_shader_integer_mix),
 699    EXT_AEP(EXT_shader_io_blocks),
 700    EXT(EXT_shader_samples_identical),
 701    EXT(EXT_tessellation_point_size),
 702    EXT_AEP(EXT_tessellation_shader),
 703    EXT(EXT_texture_array),
 704    EXT_AEP(EXT_texture_buffer),
 705    EXT_AEP(EXT_texture_cube_map_array),
 706    EXT(INTEL_conservative_rasterization),
 707    EXT(MESA_shader_integer_functions),
 708    EXT(NV_image_formats),
 709 };
 710
 711 #undef EXT
 712
 713
 714 /**
 715  * Determine whether a given extension is compatible with the target,
 716  * API, and extension information in the current parser state.
 717  */
 718 bool _mesa_glsl_extension::compatible_with_state(
 719       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 720 {
 721    return this->available_pred(state->ctx, api, gl_version);
 722 }
 723
 724 /**
 725  * Set the appropriate flags in the parser state to establish the
 726  * given behavior for this extension.
 727  */
 728 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 729                                      ext_behavior behavior) const
 730 {
 731    /* Note: the ->* operator indexes into state by the
 732     * offsets this->enable_flag and this->warn_flag.  See
 733     * _mesa_glsl_extension::supported_flag for more info.
 734     */
 735    state->*(this->enable_flag) = (behavior != extension_disable);
 736    state->*(this->warn_flag)   = (behavior == extension_warn);
 737 }
 738
 739 /**
 740  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 741  * the name is not found, return NULL.
 742  */
 743 static const _mesa_glsl_extension *find_extension(const char *name)
 744 {
 745    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 746       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 747          return &_mesa_glsl_supported_extensions[i];
 748       }
 749    }
 750    return NULL;
 751 }
 752
 753 bool
 754 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 755                              const char *behavior_string, YYLTYPE *behavior_locp,
 756                              _mesa_glsl_parse_state *state)
 757 {
 758    uint8_t gl_version = state->ctx->Extensions.Version;
 759    gl_api api = state->ctx->API;
 760    ext_behavior behavior;
 761    if (strcmp(behavior_string, "warn") == 0) {
 762       behavior = extension_warn;
 763    } else if (strcmp(behavior_string, "require") == 0) {
 764       behavior = extension_require;
 765    } else if (strcmp(behavior_string, "enable") == 0) {
 766       behavior = extension_enable;
 767    } else if (strcmp(behavior_string, "disable") == 0) {
 768       behavior = extension_disable;
 769    } else {
 770       _mesa_glsl_error(behavior_locp, state,
 771                        "unknown extension behavior `%s'",
 772                        behavior_string);
 773       return false;
 774    }
 775
 776    /* If we're in a desktop context but with an ES shader, use an ES API enum
 777     * to verify extension availability.
 778     */
 779    if (state->es_shader && api != API_OPENGLES2)
 780       api = API_OPENGLES2;
 781    /* Use the language-version derived GL version to extension checks, unless
 782     * we're using meta, which sets the version to the max.
 783     */
 784    if (gl_version != 0xff)
 785       gl_version = state->gl_version;
 786
 787    if (strcmp(name, "all") == 0) {
 788       if ((behavior == extension_enable) || (behavior == extension_require)) {
 789          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 790                           (behavior == extension_enable)
 791                           ? "enable" : "require");
 792          return false;
 793       } else {
 794          for (unsigned i = 0;
 795               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 796             const _mesa_glsl_extension *extension
 797                = &_mesa_glsl_supported_extensions[i];
 798             if (extension->compatible_with_state(state, api, gl_version)) {
 799                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 800             }
 801          }
 802       }
 803    } else {
 804       const _mesa_glsl_extension *extension = find_extension(name);
 805       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 806          extension->set_flags(state, behavior);
 807          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 808             for (unsigned i = 0;
 809                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 810                const _mesa_glsl_extension *extension =
 811                   &_mesa_glsl_supported_extensions[i];
 812
 813                if (!extension->aep)
 814                   continue;
 815                /* AEP should not be enabled if all of the sub-extensions can't
 816                 * also be enabled. This is not the proper layer to do such
 817                 * error-checking though.
 818                 */
 819                assert(extension->compatible_with_state(state, api, gl_version));
 820                extension->set_flags(state, behavior);
 821             }
 822          }
 823       } else {
 824          static const char fmt[] = "extension `%s' unsupported in %s shader";
 825
 826          if (behavior == extension_require) {
 827             _mesa_glsl_error(name_locp, state, fmt,
 828                              name, _mesa_shader_stage_to_string(state->stage));
 829             return false;
 830          } else {
 831             _mesa_glsl_warning(name_locp, state, fmt,
 832                                name, _mesa_shader_stage_to_string(state->stage));
 833          }
 834       }
 835    }
 836
 837    return true;
 838 }
 839
 840
 841 /**
 842  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 843  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 844  * (process_array_constructor, et al) sufficient information to do type
 845  * checking.
 846  *
 847  * Operates on assignments involving an aggregate initializer. E.g.,
 848  *
 849  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 850  *
 851  * or more ridiculously,
 852  *
 853  * struct S {
 854  *     vec4 v[2];
 855  * };
 856  *
 857  * struct {
 858  *     S a[2], b;
 859  *     int c;
 860  * } aggregate = {
 861  *     {
 862  *         {
 863  *             {
 864  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 865  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 866  *             } // a[0].v
 867  *         }, // a[0]
 868  *         {
 869  *             {
 870  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 871  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 872  *             } // a[1].v
 873  *         } // a[1]
 874  *     }, // a
 875  *     {
 876  *         {
 877  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 878  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 879  *         } // b.v
 880  *     }, // b
 881  *     4 // c
 882  * };
 883  *
 884  * This pass is necessary because the right-hand side of <type> e = { ... }
 885  * doesn't contain sufficient information to determine if the types match.
 886  */
 887 void
 888 _mesa_ast_set_aggregate_type(const glsl_type *type,
 889                              ast_expression *expr)
 890 {
 891    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 892    ai->constructor_type = type;
 893
 894    /* If the aggregate is an array, recursively set its elements' types. */
 895    if (type->is_array()) {
 896       /* Each array element has the type type->fields.array.
 897        *
 898        * E.g., if <type> if struct S[2] we want to set each element's type to
 899        * struct S.
 900        */
 901       for (exec_node *expr_node = ai->expressions.get_head_raw();
 902            !expr_node->is_tail_sentinel();
 903            expr_node = expr_node->next) {
 904          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 905                                                link);
 906
 907          if (expr->oper == ast_aggregate)
 908             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 909       }
 910
 911    /* If the aggregate is a struct, recursively set its fields' types. */
 912    } else if (type->is_record()) {
 913       exec_node *expr_node = ai->expressions.get_head_raw();
 914
 915       /* Iterate through the struct's fields. */
 916       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 917            i++, expr_node = expr_node->next) {
 918          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 919                                                link);
 920
 921          if (expr->oper == ast_aggregate) {
 922             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 923          }
 924       }
 925    /* If the aggregate is a matrix, set its columns' types. */
 926    } else if (type->is_matrix()) {
 927       for (exec_node *expr_node = ai->expressions.get_head_raw();
 928            !expr_node->is_tail_sentinel();
 929            expr_node = expr_node->next) {
 930          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 931                                                link);
 932
 933          if (expr->oper == ast_aggregate)
 934             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 935       }
 936    }
 937 }
 938
 939 void
 940 _mesa_ast_process_interface_block(YYLTYPE *locp,
 941                                   _mesa_glsl_parse_state *state,
 942                                   ast_interface_block *const block,
 943                                   const struct ast_type_qualifier &q)
 944 {
 945    if (q.flags.q.buffer) {
 946       if (!state->has_shader_storage_buffer_objects()) {
 947          _mesa_glsl_error(locp, state,
 948                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 949                           "required for defining shader storage blocks");
 950       } else if (state->ARB_shader_storage_buffer_object_warn) {
 951          _mesa_glsl_warning(locp, state,
 952                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 953                             "required for defining shader storage blocks");
 954       }
 955    } else if (q.flags.q.uniform) {
 956       if (!state->has_uniform_buffer_objects()) {
 957          _mesa_glsl_error(locp, state,
 958                           "#version 140 / GL_ARB_uniform_buffer_object "
 959                           "required for defining uniform blocks");
 960       } else if (state->ARB_uniform_buffer_object_warn) {
 961          _mesa_glsl_warning(locp, state,
 962                             "#version 140 / GL_ARB_uniform_buffer_object "
 963                             "required for defining uniform blocks");
 964       }
 965    } else {
 966       if (!state->has_shader_io_blocks()) {
 967          if (state->es_shader) {
 968             _mesa_glsl_error(locp, state,
 969                              "GL_OES_shader_io_blocks or #version 320 "
 970                              "required for using interface blocks");
 971          } else {
 972             _mesa_glsl_error(locp, state,
 973                              "#version 150 required for using "
 974                              "interface blocks");
 975          }
 976       }
 977    }
 978
 979    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
 980     * "It is illegal to have an input block in a vertex shader
 981     *  or an output block in a fragment shader"
 982     */
 983    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
 984       _mesa_glsl_error(locp, state,
 985                        "`in' interface block is not allowed for "
 986                        "a vertex shader");
 987    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
 988       _mesa_glsl_error(locp, state,
 989                        "`out' interface block is not allowed for "
 990                        "a fragment shader");
 991    }
 992
 993    /* Since block arrays require names, and both features are added in
 994     * the same language versions, we don't have to explicitly
 995     * version-check both things.
 996     */
 997    if (block->instance_name != NULL) {
 998       state->check_version(150, 300, locp, "interface blocks with "
 999                            "an instance name are not allowed");
1000    }
1001
1002    uint64_t interface_type_mask;
1003    struct ast_type_qualifier temp_type_qualifier;
1004
1005    /* Get a bitmask containing only the in/out/uniform/buffer
1006     * flags, allowing us to ignore other irrelevant flags like
1007     * interpolation qualifiers.
1008     */
1009    temp_type_qualifier.flags.i = 0;
1010    temp_type_qualifier.flags.q.uniform = true;
1011    temp_type_qualifier.flags.q.in = true;
1012    temp_type_qualifier.flags.q.out = true;
1013    temp_type_qualifier.flags.q.buffer = true;
1014    temp_type_qualifier.flags.q.patch = true;
1015    interface_type_mask = temp_type_qualifier.flags.i;
1016
1017    /* Get the block's interface qualifier.  The interface_qualifier
1018     * production rule guarantees that only one bit will be set (and
1019     * it will be in/out/uniform).
1020     */
1021    uint64_t block_interface_qualifier = q.flags.i;
1022
1023    block->default_layout.flags.i |= block_interface_qualifier;
1024
1025    if (state->stage == MESA_SHADER_GEOMETRY &&
1026        state->has_explicit_attrib_stream() &&
1027        block->default_layout.flags.q.out) {
1028       /* Assign global layout's stream value. */
1029       block->default_layout.flags.q.stream = 1;
1030       block->default_layout.flags.q.explicit_stream = 0;
1031       block->default_layout.stream = state->out_qualifier->stream;
1032    }
1033
1034    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1035       /* Assign global layout's xfb_buffer value. */
1036       block->default_layout.flags.q.xfb_buffer = 1;
1037       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1038       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1039    }
1040
1041    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1042       ast_type_qualifier& qualifier = member->type->qualifier;
1043       if ((qualifier.flags.i & interface_type_mask) == 0) {
1044          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1045           * "If no optional qualifier is used in a member declaration, the
1046           *  qualifier of the variable is just in, out, or uniform as declared
1047           *  by interface-qualifier."
1048           */
1049          qualifier.flags.i |= block_interface_qualifier;
1050       } else if ((qualifier.flags.i & interface_type_mask) !=
1051                  block_interface_qualifier) {
1052          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1053           * "If optional qualifiers are used, they can include interpolation
1054           *  and storage qualifiers and they must declare an input, output,
1055           *  or uniform variable consistent with the interface qualifier of
1056           *  the block."
1057           */
1058          _mesa_glsl_error(locp, state,
1059                           "uniform/in/out qualifier on "
1060                           "interface block member does not match "
1061                           "the interface block");
1062       }
1063
1064       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1065          _mesa_glsl_error(locp, state,
1066                           "invariant qualifiers can be used only "
1067                           "in interface block members for shader "
1068                           "inputs or outputs");
1069    }
1070 }
1071
1072 void
1073 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1074 {
1075    if (q->is_subroutine_decl())
1076       printf("subroutine ");
1077
1078    if (q->subroutine_list) {
1079       printf("subroutine (");
1080       q->subroutine_list->print();
1081       printf(")");
1082    }
1083
1084    if (q->flags.q.constant)
1085       printf("const ");
1086
1087    if (q->flags.q.invariant)
1088       printf("invariant ");
1089
1090    if (q->flags.q.attribute)
1091       printf("attribute ");
1092
1093    if (q->flags.q.varying)
1094       printf("varying ");
1095
1096    if (q->flags.q.in && q->flags.q.out)
1097       printf("inout ");
1098    else {
1099       if (q->flags.q.in)
1100          printf("in ");
1101
1102       if (q->flags.q.out)
1103          printf("out ");
1104    }
1105
1106    if (q->flags.q.centroid)
1107       printf("centroid ");
1108    if (q->flags.q.sample)
1109       printf("sample ");
1110    if (q->flags.q.patch)
1111       printf("patch ");
1112    if (q->flags.q.uniform)
1113       printf("uniform ");
1114    if (q->flags.q.buffer)
1115       printf("buffer ");
1116    if (q->flags.q.smooth)
1117       printf("smooth ");
1118    if (q->flags.q.flat)
1119       printf("flat ");
1120    if (q->flags.q.noperspective)
1121       printf("noperspective ");
1122 }
1123
1124
1125 void
1126 ast_node::print(void) const
1127 {
1128    printf("unhandled node ");
1129 }
1130
1131
1132 ast_node::ast_node(void)
1133 {
1134    this->location.source = 0;
1135    this->location.first_line = 0;
1136    this->location.first_column = 0;
1137    this->location.last_line = 0;
1138    this->location.last_column = 0;
1139 }
1140
1141
1142 static void
1143 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1144 {
1145    if (array_specifier)
1146       array_specifier->print();
1147 }
1148
1149
1150 void
1151 ast_compound_statement::print(void) const
1152 {
1153    printf("{\n");
1154
1155    foreach_list_typed(ast_node, ast, link, &this->statements) {
1156       ast->print();
1157    }
1158
1159    printf("}\n");
1160 }
1161
1162
1163 ast_compound_statement::ast_compound_statement(int new_scope,
1164                                                ast_node *statements)
1165 {
1166    this->new_scope = new_scope;
1167
1168    if (statements != NULL) {
1169       this->statements.push_degenerate_list_at_head(&statements->link);
1170    }
1171 }
1172
1173
1174 void
1175 ast_expression::print(void) const
1176 {
1177    switch (oper) {
1178    case ast_assign:
1179    case ast_mul_assign:
1180    case ast_div_assign:
1181    case ast_mod_assign:
1182    case ast_add_assign:
1183    case ast_sub_assign:
1184    case ast_ls_assign:
1185    case ast_rs_assign:
1186    case ast_and_assign:
1187    case ast_xor_assign:
1188    case ast_or_assign:
1189       subexpressions[0]->print();
1190       printf("%s ", operator_string(oper));
1191       subexpressions[1]->print();
1192       break;
1193
1194    case ast_field_selection:
1195       subexpressions[0]->print();
1196       printf(". %s ", primary_expression.identifier);
1197       break;
1198
1199    case ast_plus:
1200    case ast_neg:
1201    case ast_bit_not:
1202    case ast_logic_not:
1203    case ast_pre_inc:
1204    case ast_pre_dec:
1205       printf("%s ", operator_string(oper));
1206       subexpressions[0]->print();
1207       break;
1208
1209    case ast_post_inc:
1210    case ast_post_dec:
1211       subexpressions[0]->print();
1212       printf("%s ", operator_string(oper));
1213       break;
1214
1215    case ast_conditional:
1216       subexpressions[0]->print();
1217       printf("? ");
1218       subexpressions[1]->print();
1219       printf(": ");
1220       subexpressions[2]->print();
1221       break;
1222
1223    case ast_array_index:
1224       subexpressions[0]->print();
1225       printf("[ ");
1226       subexpressions[1]->print();
1227       printf("] ");
1228       break;
1229
1230    case ast_function_call: {
1231       subexpressions[0]->print();
1232       printf("( ");
1233
1234       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1235          if (&ast->link != this->expressions.get_head())
1236             printf(", ");
1237
1238          ast->print();
1239       }
1240
1241       printf(") ");
1242       break;
1243    }
1244
1245    case ast_identifier:
1246       printf("%s ", primary_expression.identifier);
1247       break;
1248
1249    case ast_int_constant:
1250       printf("%d ", primary_expression.int_constant);
1251       break;
1252
1253    case ast_uint_constant:
1254       printf("%u ", primary_expression.uint_constant);
1255       break;
1256
1257    case ast_float_constant:
1258       printf("%f ", primary_expression.float_constant);
1259       break;
1260
1261    case ast_double_constant:
1262       printf("%f ", primary_expression.double_constant);
1263       break;
1264
1265    case ast_int64_constant:
1266       printf("%" PRId64 " ", primary_expression.int64_constant);
1267       break;
1268
1269    case ast_uint64_constant:
1270       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1271       break;
1272
1273    case ast_bool_constant:
1274       printf("%s ",
1275              primary_expression.bool_constant
1276              ? "true" : "false");
1277       break;
1278
1279    case ast_sequence: {
1280       printf("( ");
1281       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1282          if (&ast->link != this->expressions.get_head())
1283             printf(", ");
1284
1285          ast->print();
1286       }
1287       printf(") ");
1288       break;
1289    }
1290
1291    case ast_aggregate: {
1292       printf("{ ");
1293       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1294          if (&ast->link != this->expressions.get_head())
1295             printf(", ");
1296
1297          ast->print();
1298       }
1299       printf("} ");
1300       break;
1301    }
1302
1303    default:
1304       assert(0);
1305       break;
1306    }
1307 }
1308
1309 ast_expression::ast_expression(int oper,
1310                                ast_expression *ex0,
1311                                ast_expression *ex1,
1312                                ast_expression *ex2) :
1313    primary_expression()
1314 {
1315    this->oper = ast_operators(oper);
1316    this->subexpressions[0] = ex0;
1317    this->subexpressions[1] = ex1;
1318    this->subexpressions[2] = ex2;
1319    this->non_lvalue_description = NULL;
1320    this->is_lhs = false;
1321 }
1322
1323
1324 void
1325 ast_expression_statement::print(void) const
1326 {
1327    if (expression)
1328       expression->print();
1329
1330    printf("; ");
1331 }
1332
1333
1334 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1335    expression(ex)
1336 {
1337    /* empty */
1338 }
1339
1340
1341 void
1342 ast_function::print(void) const
1343 {
1344    return_type->print();
1345    printf(" %s (", identifier);
1346
1347    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1348       ast->print();
1349    }
1350
1351    printf(")");
1352 }
1353
1354
1355 ast_function::ast_function(void)
1356    : return_type(NULL), identifier(NULL), is_definition(false),
1357      signature(NULL)
1358 {
1359    /* empty */
1360 }
1361
1362
1363 void
1364 ast_fully_specified_type::print(void) const
1365 {
1366    _mesa_ast_type_qualifier_print(& qualifier);
1367    specifier->print();
1368 }
1369
1370
1371 void
1372 ast_parameter_declarator::print(void) const
1373 {
1374    type->print();
1375    if (identifier)
1376       printf("%s ", identifier);
1377    ast_opt_array_dimensions_print(array_specifier);
1378 }
1379
1380
1381 void
1382 ast_function_definition::print(void) const
1383 {
1384    prototype->print();
1385    body->print();
1386 }
1387
1388
1389 void
1390 ast_declaration::print(void) const
1391 {
1392    printf("%s ", identifier);
1393    ast_opt_array_dimensions_print(array_specifier);
1394
1395    if (initializer) {
1396       printf("= ");
1397       initializer->print();
1398    }
1399 }
1400
1401
1402 ast_declaration::ast_declaration(const char *identifier,
1403                                  ast_array_specifier *array_specifier,
1404                                  ast_expression *initializer)
1405 {
1406    this->identifier = identifier;
1407    this->array_specifier = array_specifier;
1408    this->initializer = initializer;
1409 }
1410
1411
1412 void
1413 ast_declarator_list::print(void) const
1414 {
1415    assert(type || invariant);
1416
1417    if (type)
1418       type->print();
1419    else if (invariant)
1420       printf("invariant ");
1421    else
1422       printf("precise ");
1423
1424    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1425       if (&ast->link != this->declarations.get_head())
1426          printf(", ");
1427
1428       ast->print();
1429    }
1430
1431    printf("; ");
1432 }
1433
1434
1435 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1436 {
1437    this->type = type;
1438    this->invariant = false;
1439    this->precise = false;
1440 }
1441
1442 void
1443 ast_jump_statement::print(void) const
1444 {
1445    switch (mode) {
1446    case ast_continue:
1447       printf("continue; ");
1448       break;
1449    case ast_break:
1450       printf("break; ");
1451       break;
1452    case ast_return:
1453       printf("return ");
1454       if (opt_return_value)
1455          opt_return_value->print();
1456
1457       printf("; ");
1458       break;
1459    case ast_discard:
1460       printf("discard; ");
1461       break;
1462    }
1463 }
1464
1465
1466 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1467    : opt_return_value(NULL)
1468 {
1469    this->mode = ast_jump_modes(mode);
1470
1471    if (mode == ast_return)
1472       opt_return_value = return_value;
1473 }
1474
1475
1476 void
1477 ast_selection_statement::print(void) const
1478 {
1479    printf("if ( ");
1480    condition->print();
1481    printf(") ");
1482
1483    then_statement->print();
1484
1485    if (else_statement) {
1486       printf("else ");
1487       else_statement->print();
1488    }
1489 }
1490
1491
1492 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1493                                                  ast_node *then_statement,
1494                                                  ast_node *else_statement)
1495 {
1496    this->condition = condition;
1497    this->then_statement = then_statement;
1498    this->else_statement = else_statement;
1499 }
1500
1501
1502 void
1503 ast_switch_statement::print(void) const
1504 {
1505    printf("switch ( ");
1506    test_expression->print();
1507    printf(") ");
1508
1509    body->print();
1510 }
1511
1512
1513 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1514                                            ast_node *body)
1515 {
1516    this->test_expression = test_expression;
1517    this->body = body;
1518 }
1519
1520
1521 void
1522 ast_switch_body::print(void) const
1523 {
1524    printf("{\n");
1525    if (stmts != NULL) {
1526       stmts->print();
1527    }
1528    printf("}\n");
1529 }
1530
1531
1532 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1533 {
1534    this->stmts = stmts;
1535 }
1536
1537
1538 void ast_case_label::print(void) const
1539 {
1540    if (test_value != NULL) {
1541       printf("case ");
1542       test_value->print();
1543       printf(": ");
1544    } else {
1545       printf("default: ");
1546    }
1547 }
1548
1549
1550 ast_case_label::ast_case_label(ast_expression *test_value)
1551 {
1552    this->test_value = test_value;
1553 }
1554
1555
1556 void ast_case_label_list::print(void) const
1557 {
1558    foreach_list_typed(ast_node, ast, link, & this->labels) {
1559       ast->print();
1560    }
1561    printf("\n");
1562 }
1563
1564
1565 ast_case_label_list::ast_case_label_list(void)
1566 {
1567 }
1568
1569
1570 void ast_case_statement::print(void) const
1571 {
1572    labels->print();
1573    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1574       ast->print();
1575       printf("\n");
1576    }
1577 }
1578
1579
1580 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1581 {
1582    this->labels = labels;
1583 }
1584
1585
1586 void ast_case_statement_list::print(void) const
1587 {
1588    foreach_list_typed(ast_node, ast, link, & this->cases) {
1589       ast->print();
1590    }
1591 }
1592
1593
1594 ast_case_statement_list::ast_case_statement_list(void)
1595 {
1596 }
1597
1598
1599 void
1600 ast_iteration_statement::print(void) const
1601 {
1602    switch (mode) {
1603    case ast_for:
1604       printf("for( ");
1605       if (init_statement)
1606          init_statement->print();
1607       printf("; ");
1608
1609       if (condition)
1610          condition->print();
1611       printf("; ");
1612
1613       if (rest_expression)
1614          rest_expression->print();
1615       printf(") ");
1616
1617       body->print();
1618       break;
1619
1620    case ast_while:
1621       printf("while ( ");
1622       if (condition)
1623          condition->print();
1624       printf(") ");
1625       body->print();
1626       break;
1627
1628    case ast_do_while:
1629       printf("do ");
1630       body->print();
1631       printf("while ( ");
1632       if (condition)
1633          condition->print();
1634       printf("); ");
1635       break;
1636    }
1637 }
1638
1639
1640 ast_iteration_statement::ast_iteration_statement(int mode,
1641                                                  ast_node *init,
1642                                                  ast_node *condition,
1643                                                  ast_expression *rest_expression,
1644                                                  ast_node *body)
1645 {
1646    this->mode = ast_iteration_modes(mode);
1647    this->init_statement = init;
1648    this->condition = condition;
1649    this->rest_expression = rest_expression;
1650    this->body = body;
1651 }
1652
1653
1654 void
1655 ast_struct_specifier::print(void) const
1656 {
1657    printf("struct %s { ", name);
1658    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1659       ast->print();
1660    }
1661    printf("} ");
1662 }
1663
1664
1665 ast_struct_specifier::ast_struct_specifier(void *lin_ctx, const char *identifier,
1666                                            ast_declarator_list *declarator_list)
1667 {
1668    if (identifier == NULL) {
1669       static mtx_t mutex = _MTX_INITIALIZER_NP;
1670       static unsigned anon_count = 1;
1671       unsigned count;
1672
1673       mtx_lock(&mutex);
1674       count = anon_count++;
1675       mtx_unlock(&mutex);
1676
1677       identifier = linear_asprintf(lin_ctx, "#anon_struct_%04x", count);
1678    }
1679    name = identifier;
1680    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1681    is_declaration = true;
1682    layout = NULL;
1683 }
1684
1685 void ast_subroutine_list::print(void) const
1686 {
1687    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1688       if (&ast->link != this->declarations.get_head())
1689          printf(", ");
1690       ast->print();
1691    }
1692 }
1693
1694 static void
1695 set_shader_inout_layout(struct gl_shader *shader,
1696                      struct _mesa_glsl_parse_state *state)
1697 {
1698    /* Should have been prevented by the parser. */
1699    if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1700        shader->Stage == MESA_SHADER_VERTEX) {
1701       assert(!state->in_qualifier->flags.i);
1702    } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1703               shader->Stage != MESA_SHADER_TESS_EVAL) {
1704       assert(!state->in_qualifier->flags.i);
1705    }
1706
1707    if (shader->Stage != MESA_SHADER_COMPUTE) {
1708       /* Should have been prevented by the parser. */
1709       assert(!state->cs_input_local_size_specified);
1710       assert(!state->cs_input_local_size_variable_specified);
1711    }
1712
1713    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1714       /* Should have been prevented by the parser. */
1715       assert(!state->fs_uses_gl_fragcoord);
1716       assert(!state->fs_redeclares_gl_fragcoord);
1717       assert(!state->fs_pixel_center_integer);
1718       assert(!state->fs_origin_upper_left);
1719       assert(!state->fs_early_fragment_tests);
1720       assert(!state->fs_inner_coverage);
1721       assert(!state->fs_post_depth_coverage);
1722    }
1723
1724    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1725       if (state->out_qualifier->out_xfb_stride[i]) {
1726          unsigned xfb_stride;
1727          if (state->out_qualifier->out_xfb_stride[i]->
1728                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1729                 true)) {
1730             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1731          }
1732       }
1733    }
1734
1735    switch (shader->Stage) {
1736    case MESA_SHADER_TESS_CTRL:
1737       shader->info.TessCtrl.VerticesOut = 0;
1738       if (state->tcs_output_vertices_specified) {
1739          unsigned vertices;
1740          if (state->out_qualifier->vertices->
1741                process_qualifier_constant(state, "vertices", &vertices,
1742                                           false)) {
1743
1744             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1745             if (vertices > state->Const.MaxPatchVertices) {
1746                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1747                                 "GL_MAX_PATCH_VERTICES", vertices);
1748             }
1749             shader->info.TessCtrl.VerticesOut = vertices;
1750          }
1751       }
1752       break;
1753    case MESA_SHADER_TESS_EVAL:
1754       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1755       if (state->in_qualifier->flags.q.prim_type)
1756          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1757
1758       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1759       if (state->in_qualifier->flags.q.vertex_spacing)
1760          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1761
1762       shader->info.TessEval.VertexOrder = 0;
1763       if (state->in_qualifier->flags.q.ordering)
1764          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1765
1766       shader->info.TessEval.PointMode = -1;
1767       if (state->in_qualifier->flags.q.point_mode)
1768          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1769       break;
1770    case MESA_SHADER_GEOMETRY:
1771       shader->info.Geom.VerticesOut = -1;
1772       if (state->out_qualifier->flags.q.max_vertices) {
1773          unsigned qual_max_vertices;
1774          if (state->out_qualifier->max_vertices->
1775                process_qualifier_constant(state, "max_vertices",
1776                                           &qual_max_vertices, true)) {
1777
1778             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1779                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1780                _mesa_glsl_error(&loc, state,
1781                                 "maximum output vertices (%d) exceeds "
1782                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1783                                 qual_max_vertices);
1784             }
1785             shader->info.Geom.VerticesOut = qual_max_vertices;
1786          }
1787       }
1788
1789       if (state->gs_input_prim_type_specified) {
1790          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1791       } else {
1792          shader->info.Geom.InputType = PRIM_UNKNOWN;
1793       }
1794
1795       if (state->out_qualifier->flags.q.prim_type) {
1796          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1797       } else {
1798          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1799       }
1800
1801       shader->info.Geom.Invocations = 0;
1802       if (state->in_qualifier->flags.q.invocations) {
1803          unsigned invocations;
1804          if (state->in_qualifier->invocations->
1805                process_qualifier_constant(state, "invocations",
1806                                           &invocations, false)) {
1807
1808             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1809             if (invocations > MAX_GEOMETRY_SHADER_INVOCATIONS) {
1810                _mesa_glsl_error(&loc, state,
1811                                 "invocations (%d) exceeds "
1812                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1813                                 invocations);
1814             }
1815             shader->info.Geom.Invocations = invocations;
1816          }
1817       }
1818       break;
1819
1820    case MESA_SHADER_COMPUTE:
1821       if (state->cs_input_local_size_specified) {
1822          for (int i = 0; i < 3; i++)
1823             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1824       } else {
1825          for (int i = 0; i < 3; i++)
1826             shader->info.Comp.LocalSize[i] = 0;
1827       }
1828
1829       shader->info.Comp.LocalSizeVariable =
1830          state->cs_input_local_size_variable_specified;
1831       break;
1832
1833    case MESA_SHADER_FRAGMENT:
1834       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1835       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1836       shader->pixel_center_integer = state->fs_pixel_center_integer;
1837       shader->origin_upper_left = state->fs_origin_upper_left;
1838       shader->ARB_fragment_coord_conventions_enable =
1839          state->ARB_fragment_coord_conventions_enable;
1840       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1841       shader->InnerCoverage = state->fs_inner_coverage;
1842       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1843       shader->BlendSupport = state->fs_blend_support;
1844       break;
1845
1846    default:
1847       /* Nothing to do. */
1848       break;
1849    }
1850 }
1851
1852 extern "C" {
1853
1854 static void
1855 assign_subroutine_indexes(struct gl_shader *sh,
1856                           struct _mesa_glsl_parse_state *state)
1857 {
1858    int j, k;
1859    int index = 0;
1860
1861    for (j = 0; j < state->num_subroutines; j++) {
1862       while (state->subroutines[j]->subroutine_index == -1) {
1863          for (k = 0; k < state->num_subroutines; k++) {
1864             if (state->subroutines[k]->subroutine_index == index)
1865                break;
1866             else if (k == state->num_subroutines - 1) {
1867                state->subroutines[j]->subroutine_index = index;
1868             }
1869          }
1870          index++;
1871       }
1872    }
1873 }
1874
1875 static void
1876 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1877                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1878                     struct glcpp_parser *data,
1879                     unsigned version,
1880                     bool es)
1881 {
1882    unsigned gl_version = state->ctx->Extensions.Version;
1883    gl_api api = state->ctx->API;
1884
1885    if (gl_version != 0xff) {
1886       unsigned i;
1887       for (i = 0; i < state->num_supported_versions; i++) {
1888          if (state->supported_versions[i].ver == version &&
1889              state->supported_versions[i].es == es) {
1890             gl_version = state->supported_versions[i].gl_ver;
1891             break;
1892          }
1893       }
1894
1895       if (i == state->num_supported_versions)
1896          return;
1897    }
1898
1899    if (es)
1900       api = API_OPENGLES2;
1901
1902    for (unsigned i = 0;
1903         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
1904       const _mesa_glsl_extension *extension
1905          = &_mesa_glsl_supported_extensions[i];
1906       if (extension->compatible_with_state(state, api, gl_version)) {
1907          add_builtin_define(data, extension->name, 1);
1908       }
1909    }
1910 }
1911
1912 /* Implements parsing checks that we can't do during parsing */
1913 static void
1914 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
1915 {
1916    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
1917       YYLTYPE loc;
1918       memset(&loc, 0, sizeof(loc));
1919       _mesa_glsl_error(&loc, state, "Compute shaders require "
1920                        "GLSL 4.30 or GLSL ES 3.10");
1921    }
1922 }
1923
1924 void
1925 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
1926                           bool dump_ast, bool dump_hir, bool force_recompile)
1927 {
1928    struct _mesa_glsl_parse_state *state =
1929       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
1930    const char *source = force_recompile && shader->FallbackSource ?
1931       shader->FallbackSource : shader->Source;
1932
1933    if (ctx->Const.GenerateTemporaryNames)
1934       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
1935                               false, true);
1936
1937    state->error = glcpp_preprocess(state, &source, &state->info_log,
1938                              add_builtin_defines, state, ctx);
1939
1940    if (!force_recompile) {
1941       char buf[41];
1942       _mesa_sha1_compute(source, strlen(source), shader->sha1);
1943       if (ctx->Cache && disk_cache_has_key(ctx->Cache, shader->sha1)) {
1944          /* We've seen this shader before and know it compiles */
1945          if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
1946             fprintf(stderr, "deferring compile of shader: %s\n",
1947                     _mesa_sha1_format(buf, shader->sha1));
1948          }
1949          shader->CompileStatus = true;
1950
1951          free((void *)shader->FallbackSource);
1952          shader->FallbackSource = NULL;
1953          return;
1954       }
1955    }
1956
1957    if (!state->error) {
1958      _mesa_glsl_lexer_ctor(state, source);
1959      _mesa_glsl_parse(state);
1960      _mesa_glsl_lexer_dtor(state);
1961      do_late_parsing_checks(state);
1962    }
1963
1964    if (dump_ast) {
1965       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
1966          ast->print();
1967       }
1968       printf("\n\n");
1969    }
1970
1971    ralloc_free(shader->ir);
1972    shader->ir = new(shader) exec_list;
1973    if (!state->error && !state->translation_unit.is_empty())
1974       _mesa_ast_to_hir(shader->ir, state);
1975
1976    if (!state->error) {
1977       validate_ir_tree(shader->ir);
1978
1979       /* Print out the unoptimized IR. */
1980       if (dump_hir) {
1981          _mesa_print_ir(stdout, shader->ir, state);
1982       }
1983    }
1984
1985
1986    if (!state->error && !shader->ir->is_empty()) {
1987       struct gl_shader_compiler_options *options =
1988          &ctx->Const.ShaderCompilerOptions[shader->Stage];
1989
1990       assign_subroutine_indexes(shader, state);
1991       lower_subroutine(shader->ir, state);
1992
1993       /* Do some optimization at compile time to reduce shader IR size
1994        * and reduce later work if the same shader is linked multiple times
1995        */
1996       if (ctx->Const.GLSLOptimizeConservatively) {
1997          /* Run it just once. */
1998          do_common_optimization(shader->ir, false, false, options,
1999                                 ctx->Const.NativeIntegers);
2000       } else {
2001          /* Repeat it until it stops making changes. */
2002          while (do_common_optimization(shader->ir, false, false, options,
2003                                        ctx->Const.NativeIntegers))
2004             ;
2005       }
2006
2007       validate_ir_tree(shader->ir);
2008
2009       enum ir_variable_mode other;
2010       switch (shader->Stage) {
2011       case MESA_SHADER_VERTEX:
2012          other = ir_var_shader_in;
2013          break;
2014       case MESA_SHADER_FRAGMENT:
2015          other = ir_var_shader_out;
2016          break;
2017       default:
2018          /* Something invalid to ensure optimize_dead_builtin_uniforms
2019           * doesn't remove anything other than uniforms or constants.
2020           */
2021          other = ir_var_mode_count;
2022          break;
2023       }
2024
2025       optimize_dead_builtin_variables(shader->ir, other);
2026
2027       validate_ir_tree(shader->ir);
2028    }
2029
2030    if (shader->InfoLog)
2031       ralloc_free(shader->InfoLog);
2032
2033    if (!state->error)
2034       set_shader_inout_layout(shader, state);
2035
2036    shader->symbols = new(shader->ir) glsl_symbol_table;
2037    shader->CompileStatus = !state->error;
2038    shader->InfoLog = state->info_log;
2039    shader->Version = state->language_version;
2040    shader->IsES = state->es_shader;
2041
2042    /* Retain any live IR, but trash the rest. */
2043    reparent_ir(shader->ir, shader->ir);
2044
2045    /* Destroy the symbol table.  Create a new symbol table that contains only
2046     * the variables and functions that still exist in the IR.  The symbol
2047     * table will be used later during linking.
2048     *
2049     * There must NOT be any freed objects still referenced by the symbol
2050     * table.  That could cause the linker to dereference freed memory.
2051     *
2052     * We don't have to worry about types or interface-types here because those
2053     * are fly-weights that are looked up by glsl_type.
2054     */
2055    foreach_in_list (ir_instruction, ir, shader->ir) {
2056       switch (ir->ir_type) {
2057       case ir_type_function:
2058          shader->symbols->add_function((ir_function *) ir);
2059          break;
2060       case ir_type_variable: {
2061          ir_variable *const var = (ir_variable *) ir;
2062
2063          if (var->data.mode != ir_var_temporary)
2064             shader->symbols->add_variable(var);
2065          break;
2066       }
2067       default:
2068          break;
2069       }
2070    }
2071
2072    _mesa_glsl_initialize_derived_variables(ctx, shader);
2073
2074    if (!force_recompile) {
2075       free((void *)shader->FallbackSource);
2076       shader->FallbackSource = NULL;
2077    }
2078
2079    delete state->symbols;
2080    ralloc_free(state);
2081 }
2082
2083 } /* extern "C" */
2084 /**
2085  * Do the set of common optimizations passes
2086  *
2087  * \param ir                          List of instructions to be optimized
2088  * \param linked                      Is the shader linked?  This enables
2089  *                                    optimizations passes that remove code at
2090  *                                    global scope and could cause linking to
2091  *                                    fail.
2092  * \param uniform_locations_assigned  Have locations already been assigned for
2093  *                                    uniforms?  This prevents the declarations
2094  *                                    of unused uniforms from being removed.
2095  *                                    The setting of this flag only matters if
2096  *                                    \c linked is \c true.
2097  * \param options                     The driver's preferred shader options.
2098  * \param native_integers             Selects optimizations that depend on the
2099  *                                    implementations supporting integers
2100  *                                    natively (as opposed to supporting
2101  *                                    integers in floating point registers).
2102  */
2103 bool
2104 do_common_optimization(exec_list *ir, bool linked,
2105                        bool uniform_locations_assigned,
2106                        const struct gl_shader_compiler_options *options,
2107                        bool native_integers)
2108 {
2109    const bool debug = false;
2110    GLboolean progress = GL_FALSE;
2111
2112 #define OPT(PASS, ...) do {                                             \
2113       if (debug) {                                                      \
2114          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2115          const bool opt_progress = PASS(__VA_ARGS__);                   \
2116          progress = opt_progress || progress;                           \
2117          if (opt_progress)                                              \
2118             _mesa_print_ir(stderr, ir, NULL);                           \
2119          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2120                  #PASS, opt_progress ? "made" : "no");                  \
2121       } else {                                                          \
2122          progress = PASS(__VA_ARGS__) || progress;                      \
2123       }                                                                 \
2124    } while (false)
2125
2126    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2127
2128    if (linked) {
2129       OPT(do_function_inlining, ir);
2130       OPT(do_dead_functions, ir);
2131       OPT(do_structure_splitting, ir);
2132    }
2133    propagate_invariance(ir);
2134    OPT(do_if_simplification, ir);
2135    OPT(opt_flatten_nested_if_blocks, ir);
2136    OPT(opt_conditional_discard, ir);
2137    OPT(do_copy_propagation, ir);
2138    OPT(do_copy_propagation_elements, ir);
2139
2140    if (options->OptimizeForAOS && !linked)
2141       OPT(opt_flip_matrices, ir);
2142
2143    if (linked && options->OptimizeForAOS) {
2144       OPT(do_vectorize, ir);
2145    }
2146
2147    if (linked)
2148       OPT(do_dead_code, ir, uniform_locations_assigned);
2149    else
2150       OPT(do_dead_code_unlinked, ir);
2151    OPT(do_dead_code_local, ir);
2152    OPT(do_tree_grafting, ir);
2153    OPT(do_constant_propagation, ir);
2154    if (linked)
2155       OPT(do_constant_variable, ir);
2156    else
2157       OPT(do_constant_variable_unlinked, ir);
2158    OPT(do_constant_folding, ir);
2159    OPT(do_minmax_prune, ir);
2160    OPT(do_rebalance_tree, ir);
2161    OPT(do_algebraic, ir, native_integers, options);
2162    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2163        options->EmitNoCont, options->EmitNoLoops);
2164    OPT(do_vec_index_to_swizzle, ir);
2165    OPT(lower_vector_insert, ir, false);
2166    OPT(do_swizzle_swizzle, ir);
2167    OPT(do_noop_swizzle, ir);
2168
2169    OPT(optimize_split_arrays, ir, linked);
2170    OPT(optimize_redundant_jumps, ir);
2171
2172    if (options->MaxUnrollIterations) {
2173       loop_state *ls = analyze_loop_variables(ir);
2174       if (ls->loop_found) {
2175          OPT(set_loop_controls, ir, ls);
2176          OPT(unroll_loops, ir, ls, options);
2177       }
2178       delete ls;
2179    }
2180
2181 #undef OPT
2182
2183    return progress;
2184 }
2185
2186 extern "C" {
2187
2188 /**
2189  * To be called at GL teardown time, this frees compiler datastructures.
2190  *
2191  * After calling this, any previously compiled shaders and shader
2192  * programs would be invalid.  So this should happen at approximately
2193  * program exit.
2194  */
2195 void
2196 _mesa_destroy_shader_compiler(void)
2197 {
2198    _mesa_destroy_shader_compiler_caches();
2199
2200    _mesa_glsl_release_types();
2201 }
2202
2203 /**
2204  * Releases compiler caches to trade off performance for memory.
2205  *
2206  * Intended to be used with glReleaseShaderCompiler().
2207  */
2208 void
2209 _mesa_destroy_shader_compiler_caches(void)
2210 {
2211    _mesa_glsl_release_builtin_functions();
2212 }
2213
2214 }