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, 460 };
  58 static const unsigned known_desktop_gl_versions[] =
  59    {  20,  21,  30,  31,  32,  33,  40,  41,  42,  43,  44,  45, 46 };
  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    this->allow_builtin_variable_redeclaration =
 309       ctx->Const.AllowGLSLBuiltinVariableRedeclaration;
 310
 311    this->cs_input_local_size_variable_specified = false;
 312
 313    /* ARB_bindless_texture */
 314    this->bindless_sampler_specified = false;
 315    this->bindless_image_specified = false;
 316    this->bound_sampler_specified = false;
 317    this->bound_image_specified = false;
 318 }
 319
 320 /**
 321  * Determine whether the current GLSL version is sufficiently high to support
 322  * a certain feature, and generate an error message if it isn't.
 323  *
 324  * \param required_glsl_version and \c required_glsl_es_version are
 325  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 326  *
 327  * \param locp is the parser location where the error should be reported.
 328  *
 329  * \param fmt (and additional arguments) constitute a printf-style error
 330  * message to report if the version check fails.  Information about the
 331  * current and required GLSL versions will be appended.  So, for example, if
 332  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 333  * "foo unsupported") is called, the error message will be "foo unsupported in
 334  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 335  */
 336 bool
 337 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 338                                       unsigned required_glsl_es_version,
 339                                       YYLTYPE *locp, const char *fmt, ...)
 340 {
 341    if (this->is_version(required_glsl_version, required_glsl_es_version))
 342       return true;
 343
 344    va_list args;
 345    va_start(args, fmt);
 346    char *problem = ralloc_vasprintf(this, fmt, args);
 347    va_end(args);
 348    const char *glsl_version_string
 349       = glsl_compute_version_string(this, false, required_glsl_version);
 350    const char *glsl_es_version_string
 351       = glsl_compute_version_string(this, true, required_glsl_es_version);
 352    const char *requirement_string = "";
 353    if (required_glsl_version && required_glsl_es_version) {
 354       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 355                                            glsl_version_string,
 356                                            glsl_es_version_string);
 357    } else if (required_glsl_version) {
 358       requirement_string = ralloc_asprintf(this, " (%s required)",
 359                                            glsl_version_string);
 360    } else if (required_glsl_es_version) {
 361       requirement_string = ralloc_asprintf(this, " (%s required)",
 362                                            glsl_es_version_string);
 363    }
 364    _mesa_glsl_error(locp, this, "%s in %s%s",
 365                     problem, this->get_version_string(),
 366                     requirement_string);
 367
 368    return false;
 369 }
 370
 371 /**
 372  * Process a GLSL #version directive.
 373  *
 374  * \param version is the integer that follows the #version token.
 375  *
 376  * \param ident is a string identifier that follows the integer, if any is
 377  * present.  Otherwise NULL.
 378  */
 379 void
 380 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 381                                                   const char *ident)
 382 {
 383    bool es_token_present = false;
 384    bool compat_token_present = false;
 385    if (ident) {
 386       if (strcmp(ident, "es") == 0) {
 387          es_token_present = true;
 388       } else if (version >= 150) {
 389          if (strcmp(ident, "core") == 0) {
 390             /* Accept the token.  There's no need to record that this is
 391              * a core profile shader since that's the only profile we support.
 392              */
 393          } else if (strcmp(ident, "compatibility") == 0) {
 394             compat_token_present = true;
 395
 396             if (this->ctx->API != API_OPENGL_COMPAT) {
 397                _mesa_glsl_error(locp, this,
 398                                 "the compatibility profile is not supported");
 399             }
 400          } else {
 401             _mesa_glsl_error(locp, this,
 402                              "\"%s\" is not a valid shading language profile; "
 403                              "if present, it must be \"core\"", ident);
 404          }
 405       } else {
 406          _mesa_glsl_error(locp, this,
 407                           "illegal text following version number");
 408       }
 409    }
 410
 411    this->es_shader = es_token_present;
 412    if (version == 100) {
 413       if (es_token_present) {
 414          _mesa_glsl_error(locp, this,
 415                           "GLSL 1.00 ES should be selected using "
 416                           "`#version 100'");
 417       } else {
 418          this->es_shader = true;
 419       }
 420    }
 421
 422    if (this->es_shader) {
 423       this->ARB_texture_rectangle_enable = false;
 424    }
 425
 426    if (this->forced_language_version)
 427       this->language_version = this->forced_language_version;
 428    else
 429       this->language_version = version;
 430
 431    this->compat_shader = compat_token_present ||
 432                          (!this->es_shader && this->language_version < 140);
 433
 434    bool supported = false;
 435    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 436       if (this->supported_versions[i].ver == this->language_version
 437           && this->supported_versions[i].es == this->es_shader) {
 438          this->gl_version = this->supported_versions[i].gl_ver;
 439          supported = true;
 440          break;
 441       }
 442    }
 443
 444    if (!supported) {
 445       _mesa_glsl_error(locp, this, "%s is not supported. "
 446                        "Supported versions are: %s",
 447                        this->get_version_string(),
 448                        this->supported_version_string);
 449
 450       /* On exit, the language_version must be set to a valid value.
 451        * Later calls to _mesa_glsl_initialize_types will misbehave if
 452        * the version is invalid.
 453        */
 454       switch (this->ctx->API) {
 455       case API_OPENGL_COMPAT:
 456       case API_OPENGL_CORE:
 457          this->language_version = this->ctx->Const.GLSLVersion;
 458          break;
 459
 460       case API_OPENGLES:
 461          assert(!"Should not get here.");
 462          /* FALLTHROUGH */
 463
 464       case API_OPENGLES2:
 465          this->language_version = 100;
 466          break;
 467       }
 468    }
 469 }
 470
 471
 472 /* This helper function will append the given message to the shader's
 473    info log and report it via GL_ARB_debug_output. Per that extension,
 474    'type' is one of the enum values classifying the message, and
 475    'id' is the implementation-defined ID of the given message. */
 476 static void
 477 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 478                GLenum type, const char *fmt, va_list ap)
 479 {
 480    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 481    GLuint msg_id = 0;
 482
 483    assert(state->info_log != NULL);
 484
 485    /* Get the offset that the new message will be written to. */
 486    int msg_offset = strlen(state->info_log);
 487
 488    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 489                                             locp->source,
 490                                             locp->first_line,
 491                                             locp->first_column,
 492                                             error ? "error" : "warning");
 493    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 494
 495    const char *const msg = &state->info_log[msg_offset];
 496    struct gl_context *ctx = state->ctx;
 497
 498    /* Report the error via GL_ARB_debug_output. */
 499    _mesa_shader_debug(ctx, type, &msg_id, msg);
 500
 501    ralloc_strcat(&state->info_log, "\n");
 502 }
 503
 504 void
 505 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 506                  const char *fmt, ...)
 507 {
 508    va_list ap;
 509
 510    state->error = true;
 511
 512    va_start(ap, fmt);
 513    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 514    va_end(ap);
 515 }
 516
 517
 518 void
 519 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 520                    const char *fmt, ...)
 521 {
 522    va_list ap;
 523
 524    va_start(ap, fmt);
 525    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 526    va_end(ap);
 527 }
 528
 529
 530 /**
 531  * Enum representing the possible behaviors that can be specified in
 532  * an #extension directive.
 533  */
 534 enum ext_behavior {
 535    extension_disable,
 536    extension_enable,
 537    extension_require,
 538    extension_warn
 539 };
 540
 541 /**
 542  * Element type for _mesa_glsl_supported_extensions
 543  */
 544 struct _mesa_glsl_extension {
 545    /**
 546     * Name of the extension when referred to in a GLSL extension
 547     * statement
 548     */
 549    const char *name;
 550
 551    /**
 552     * Whether this extension is a part of AEP
 553     */
 554    bool aep;
 555
 556    /**
 557     * Predicate that checks whether the relevant extension is available for
 558     * this context.
 559     */
 560    bool (*available_pred)(const struct gl_context *,
 561                           gl_api api, uint8_t version);
 562
 563    /**
 564     * Flag in the _mesa_glsl_parse_state struct that should be set
 565     * when this extension is enabled.
 566     *
 567     * See note in _mesa_glsl_extension::supported_flag about "pointer
 568     * to member" types.
 569     */
 570    bool _mesa_glsl_parse_state::* enable_flag;
 571
 572    /**
 573     * Flag in the _mesa_glsl_parse_state struct that should be set
 574     * when the shader requests "warn" behavior for this extension.
 575     *
 576     * See note in _mesa_glsl_extension::supported_flag about "pointer
 577     * to member" types.
 578     */
 579    bool _mesa_glsl_parse_state::* warn_flag;
 580
 581
 582    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 583                               gl_api api, uint8_t gl_version) const;
 584    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 585 };
 586
 587 /** Checks if the context supports a user-facing extension */
 588 #define EXT(name_str, driver_cap, ...) \
 589 static MAYBE_UNUSED bool \
 590 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 591 { \
 592    return ctx->Extensions.driver_cap && (version >= \
 593           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 594 }
 595 #include "main/extensions_table.h"
 596 #undef EXT
 597
 598 #define EXT(NAME)                                           \
 599    { "GL_" #NAME, false, has_##NAME,                        \
 600      &_mesa_glsl_parse_state::NAME##_enable,                \
 601      &_mesa_glsl_parse_state::NAME##_warn }
 602
 603 #define EXT_AEP(NAME)                                       \
 604    { "GL_" #NAME, true, has_##NAME,                         \
 605      &_mesa_glsl_parse_state::NAME##_enable,                \
 606      &_mesa_glsl_parse_state::NAME##_warn }
 607
 608 /**
 609  * Table of extensions that can be enabled/disabled within a shader,
 610  * and the conditions under which they are supported.
 611  */
 612 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 613    /* ARB extensions go here, sorted alphabetically.
 614     */
 615    EXT(ARB_ES3_1_compatibility),
 616    EXT(ARB_ES3_2_compatibility),
 617    EXT(ARB_arrays_of_arrays),
 618    EXT(ARB_bindless_texture),
 619    EXT(ARB_compute_shader),
 620    EXT(ARB_compute_variable_group_size),
 621    EXT(ARB_conservative_depth),
 622    EXT(ARB_cull_distance),
 623    EXT(ARB_derivative_control),
 624    EXT(ARB_draw_buffers),
 625    EXT(ARB_draw_instanced),
 626    EXT(ARB_enhanced_layouts),
 627    EXT(ARB_explicit_attrib_location),
 628    EXT(ARB_explicit_uniform_location),
 629    EXT(ARB_fragment_coord_conventions),
 630    EXT(ARB_fragment_layer_viewport),
 631    EXT(ARB_gpu_shader5),
 632    EXT(ARB_gpu_shader_fp64),
 633    EXT(ARB_gpu_shader_int64),
 634    EXT(ARB_post_depth_coverage),
 635    EXT(ARB_sample_shading),
 636    EXT(ARB_separate_shader_objects),
 637    EXT(ARB_shader_atomic_counter_ops),
 638    EXT(ARB_shader_atomic_counters),
 639    EXT(ARB_shader_ballot),
 640    EXT(ARB_shader_bit_encoding),
 641    EXT(ARB_shader_clock),
 642    EXT(ARB_shader_draw_parameters),
 643    EXT(ARB_shader_group_vote),
 644    EXT(ARB_shader_image_load_store),
 645    EXT(ARB_shader_image_size),
 646    EXT(ARB_shader_precision),
 647    EXT(ARB_shader_stencil_export),
 648    EXT(ARB_shader_storage_buffer_object),
 649    EXT(ARB_shader_subroutine),
 650    EXT(ARB_shader_texture_image_samples),
 651    EXT(ARB_shader_texture_lod),
 652    EXT(ARB_shader_viewport_layer_array),
 653    EXT(ARB_shading_language_420pack),
 654    EXT(ARB_shading_language_packing),
 655    EXT(ARB_tessellation_shader),
 656    EXT(ARB_texture_cube_map_array),
 657    EXT(ARB_texture_gather),
 658    EXT(ARB_texture_multisample),
 659    EXT(ARB_texture_query_levels),
 660    EXT(ARB_texture_query_lod),
 661    EXT(ARB_texture_rectangle),
 662    EXT(ARB_uniform_buffer_object),
 663    EXT(ARB_vertex_attrib_64bit),
 664    EXT(ARB_viewport_array),
 665
 666    /* KHR extensions go here, sorted alphabetically.
 667     */
 668    EXT_AEP(KHR_blend_equation_advanced),
 669
 670    /* OES extensions go here, sorted alphabetically.
 671     */
 672    EXT(OES_EGL_image_external),
 673    EXT(OES_geometry_point_size),
 674    EXT(OES_geometry_shader),
 675    EXT(OES_gpu_shader5),
 676    EXT(OES_primitive_bounding_box),
 677    EXT_AEP(OES_sample_variables),
 678    EXT_AEP(OES_shader_image_atomic),
 679    EXT(OES_shader_io_blocks),
 680    EXT_AEP(OES_shader_multisample_interpolation),
 681    EXT(OES_standard_derivatives),
 682    EXT(OES_tessellation_point_size),
 683    EXT(OES_tessellation_shader),
 684    EXT(OES_texture_3D),
 685    EXT(OES_texture_buffer),
 686    EXT(OES_texture_cube_map_array),
 687    EXT_AEP(OES_texture_storage_multisample_2d_array),
 688    EXT(OES_viewport_array),
 689
 690    /* All other extensions go here, sorted alphabetically.
 691     */
 692    EXT(AMD_conservative_depth),
 693    EXT(AMD_shader_stencil_export),
 694    EXT(AMD_shader_trinary_minmax),
 695    EXT(AMD_vertex_shader_layer),
 696    EXT(AMD_vertex_shader_viewport_index),
 697    EXT(ANDROID_extension_pack_es31a),
 698    EXT(EXT_blend_func_extended),
 699    EXT(EXT_frag_depth),
 700    EXT(EXT_draw_buffers),
 701    EXT(EXT_clip_cull_distance),
 702    EXT(EXT_geometry_point_size),
 703    EXT_AEP(EXT_geometry_shader),
 704    EXT_AEP(EXT_gpu_shader5),
 705    EXT_AEP(EXT_primitive_bounding_box),
 706    EXT(EXT_separate_shader_objects),
 707    EXT(EXT_shader_framebuffer_fetch),
 708    EXT(EXT_shader_integer_mix),
 709    EXT_AEP(EXT_shader_io_blocks),
 710    EXT(EXT_shader_samples_identical),
 711    EXT(EXT_tessellation_point_size),
 712    EXT_AEP(EXT_tessellation_shader),
 713    EXT(EXT_texture_array),
 714    EXT_AEP(EXT_texture_buffer),
 715    EXT_AEP(EXT_texture_cube_map_array),
 716    EXT(INTEL_conservative_rasterization),
 717    EXT(MESA_shader_integer_functions),
 718    EXT(NV_image_formats),
 719 };
 720
 721 #undef EXT
 722
 723
 724 /**
 725  * Determine whether a given extension is compatible with the target,
 726  * API, and extension information in the current parser state.
 727  */
 728 bool _mesa_glsl_extension::compatible_with_state(
 729       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 730 {
 731    return this->available_pred(state->ctx, api, gl_version);
 732 }
 733
 734 /**
 735  * Set the appropriate flags in the parser state to establish the
 736  * given behavior for this extension.
 737  */
 738 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 739                                      ext_behavior behavior) const
 740 {
 741    /* Note: the ->* operator indexes into state by the
 742     * offsets this->enable_flag and this->warn_flag.  See
 743     * _mesa_glsl_extension::supported_flag for more info.
 744     */
 745    state->*(this->enable_flag) = (behavior != extension_disable);
 746    state->*(this->warn_flag)   = (behavior == extension_warn);
 747 }
 748
 749 /**
 750  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 751  * the name is not found, return NULL.
 752  */
 753 static const _mesa_glsl_extension *find_extension(const char *name)
 754 {
 755    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 756       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 757          return &_mesa_glsl_supported_extensions[i];
 758       }
 759    }
 760    return NULL;
 761 }
 762
 763 bool
 764 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 765                              const char *behavior_string, YYLTYPE *behavior_locp,
 766                              _mesa_glsl_parse_state *state)
 767 {
 768    uint8_t gl_version = state->ctx->Extensions.Version;
 769    gl_api api = state->ctx->API;
 770    ext_behavior behavior;
 771    if (strcmp(behavior_string, "warn") == 0) {
 772       behavior = extension_warn;
 773    } else if (strcmp(behavior_string, "require") == 0) {
 774       behavior = extension_require;
 775    } else if (strcmp(behavior_string, "enable") == 0) {
 776       behavior = extension_enable;
 777    } else if (strcmp(behavior_string, "disable") == 0) {
 778       behavior = extension_disable;
 779    } else {
 780       _mesa_glsl_error(behavior_locp, state,
 781                        "unknown extension behavior `%s'",
 782                        behavior_string);
 783       return false;
 784    }
 785
 786    /* If we're in a desktop context but with an ES shader, use an ES API enum
 787     * to verify extension availability.
 788     */
 789    if (state->es_shader && api != API_OPENGLES2)
 790       api = API_OPENGLES2;
 791    /* Use the language-version derived GL version to extension checks, unless
 792     * we're using meta, which sets the version to the max.
 793     */
 794    if (gl_version != 0xff)
 795       gl_version = state->gl_version;
 796
 797    if (strcmp(name, "all") == 0) {
 798       if ((behavior == extension_enable) || (behavior == extension_require)) {
 799          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 800                           (behavior == extension_enable)
 801                           ? "enable" : "require");
 802          return false;
 803       } else {
 804          for (unsigned i = 0;
 805               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 806             const _mesa_glsl_extension *extension
 807                = &_mesa_glsl_supported_extensions[i];
 808             if (extension->compatible_with_state(state, api, gl_version)) {
 809                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 810             }
 811          }
 812       }
 813    } else {
 814       const _mesa_glsl_extension *extension = find_extension(name);
 815       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 816          extension->set_flags(state, behavior);
 817          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 818             for (unsigned i = 0;
 819                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 820                const _mesa_glsl_extension *extension =
 821                   &_mesa_glsl_supported_extensions[i];
 822
 823                if (!extension->aep)
 824                   continue;
 825                /* AEP should not be enabled if all of the sub-extensions can't
 826                 * also be enabled. This is not the proper layer to do such
 827                 * error-checking though.
 828                 */
 829                assert(extension->compatible_with_state(state, api, gl_version));
 830                extension->set_flags(state, behavior);
 831             }
 832          }
 833       } else {
 834          static const char fmt[] = "extension `%s' unsupported in %s shader";
 835
 836          if (behavior == extension_require) {
 837             _mesa_glsl_error(name_locp, state, fmt,
 838                              name, _mesa_shader_stage_to_string(state->stage));
 839             return false;
 840          } else {
 841             _mesa_glsl_warning(name_locp, state, fmt,
 842                                name, _mesa_shader_stage_to_string(state->stage));
 843          }
 844       }
 845    }
 846
 847    return true;
 848 }
 849
 850
 851 /**
 852  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 853  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 854  * (process_array_constructor, et al) sufficient information to do type
 855  * checking.
 856  *
 857  * Operates on assignments involving an aggregate initializer. E.g.,
 858  *
 859  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 860  *
 861  * or more ridiculously,
 862  *
 863  * struct S {
 864  *     vec4 v[2];
 865  * };
 866  *
 867  * struct {
 868  *     S a[2], b;
 869  *     int c;
 870  * } aggregate = {
 871  *     {
 872  *         {
 873  *             {
 874  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 875  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 876  *             } // a[0].v
 877  *         }, // a[0]
 878  *         {
 879  *             {
 880  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 881  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 882  *             } // a[1].v
 883  *         } // a[1]
 884  *     }, // a
 885  *     {
 886  *         {
 887  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 888  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 889  *         } // b.v
 890  *     }, // b
 891  *     4 // c
 892  * };
 893  *
 894  * This pass is necessary because the right-hand side of <type> e = { ... }
 895  * doesn't contain sufficient information to determine if the types match.
 896  */
 897 void
 898 _mesa_ast_set_aggregate_type(const glsl_type *type,
 899                              ast_expression *expr)
 900 {
 901    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 902    ai->constructor_type = type;
 903
 904    /* If the aggregate is an array, recursively set its elements' types. */
 905    if (type->is_array()) {
 906       /* Each array element has the type type->fields.array.
 907        *
 908        * E.g., if <type> if struct S[2] we want to set each element's type to
 909        * struct S.
 910        */
 911       for (exec_node *expr_node = ai->expressions.get_head_raw();
 912            !expr_node->is_tail_sentinel();
 913            expr_node = expr_node->next) {
 914          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 915                                                link);
 916
 917          if (expr->oper == ast_aggregate)
 918             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 919       }
 920
 921    /* If the aggregate is a struct, recursively set its fields' types. */
 922    } else if (type->is_record()) {
 923       exec_node *expr_node = ai->expressions.get_head_raw();
 924
 925       /* Iterate through the struct's fields. */
 926       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 927            i++, 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->fields.structure[i].type, expr);
 933          }
 934       }
 935    /* If the aggregate is a matrix, set its columns' types. */
 936    } else if (type->is_matrix()) {
 937       for (exec_node *expr_node = ai->expressions.get_head_raw();
 938            !expr_node->is_tail_sentinel();
 939            expr_node = expr_node->next) {
 940          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 941                                                link);
 942
 943          if (expr->oper == ast_aggregate)
 944             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 945       }
 946    }
 947 }
 948
 949 void
 950 _mesa_ast_process_interface_block(YYLTYPE *locp,
 951                                   _mesa_glsl_parse_state *state,
 952                                   ast_interface_block *const block,
 953                                   const struct ast_type_qualifier &q)
 954 {
 955    if (q.flags.q.buffer) {
 956       if (!state->has_shader_storage_buffer_objects()) {
 957          _mesa_glsl_error(locp, state,
 958                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 959                           "required for defining shader storage blocks");
 960       } else if (state->ARB_shader_storage_buffer_object_warn) {
 961          _mesa_glsl_warning(locp, state,
 962                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 963                             "required for defining shader storage blocks");
 964       }
 965    } else if (q.flags.q.uniform) {
 966       if (!state->has_uniform_buffer_objects()) {
 967          _mesa_glsl_error(locp, state,
 968                           "#version 140 / GL_ARB_uniform_buffer_object "
 969                           "required for defining uniform blocks");
 970       } else if (state->ARB_uniform_buffer_object_warn) {
 971          _mesa_glsl_warning(locp, state,
 972                             "#version 140 / GL_ARB_uniform_buffer_object "
 973                             "required for defining uniform blocks");
 974       }
 975    } else {
 976       if (!state->has_shader_io_blocks()) {
 977          if (state->es_shader) {
 978             _mesa_glsl_error(locp, state,
 979                              "GL_OES_shader_io_blocks or #version 320 "
 980                              "required for using interface blocks");
 981          } else {
 982             _mesa_glsl_error(locp, state,
 983                              "#version 150 required for using "
 984                              "interface blocks");
 985          }
 986       }
 987    }
 988
 989    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
 990     * "It is illegal to have an input block in a vertex shader
 991     *  or an output block in a fragment shader"
 992     */
 993    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
 994       _mesa_glsl_error(locp, state,
 995                        "`in' interface block is not allowed for "
 996                        "a vertex shader");
 997    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
 998       _mesa_glsl_error(locp, state,
 999                        "`out' interface block is not allowed for "
1000                        "a fragment shader");
1001    }
1002
1003    /* Since block arrays require names, and both features are added in
1004     * the same language versions, we don't have to explicitly
1005     * version-check both things.
1006     */
1007    if (block->instance_name != NULL) {
1008       state->check_version(150, 300, locp, "interface blocks with "
1009                            "an instance name are not allowed");
1010    }
1011
1012    uint64_t interface_type_mask;
1013    struct ast_type_qualifier temp_type_qualifier;
1014
1015    /* Get a bitmask containing only the in/out/uniform/buffer
1016     * flags, allowing us to ignore other irrelevant flags like
1017     * interpolation qualifiers.
1018     */
1019    temp_type_qualifier.flags.i = 0;
1020    temp_type_qualifier.flags.q.uniform = true;
1021    temp_type_qualifier.flags.q.in = true;
1022    temp_type_qualifier.flags.q.out = true;
1023    temp_type_qualifier.flags.q.buffer = true;
1024    temp_type_qualifier.flags.q.patch = true;
1025    interface_type_mask = temp_type_qualifier.flags.i;
1026
1027    /* Get the block's interface qualifier.  The interface_qualifier
1028     * production rule guarantees that only one bit will be set (and
1029     * it will be in/out/uniform).
1030     */
1031    uint64_t block_interface_qualifier = q.flags.i;
1032
1033    block->default_layout.flags.i |= block_interface_qualifier;
1034
1035    if (state->stage == MESA_SHADER_GEOMETRY &&
1036        state->has_explicit_attrib_stream() &&
1037        block->default_layout.flags.q.out) {
1038       /* Assign global layout's stream value. */
1039       block->default_layout.flags.q.stream = 1;
1040       block->default_layout.flags.q.explicit_stream = 0;
1041       block->default_layout.stream = state->out_qualifier->stream;
1042    }
1043
1044    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1045       /* Assign global layout's xfb_buffer value. */
1046       block->default_layout.flags.q.xfb_buffer = 1;
1047       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1048       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1049    }
1050
1051    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1052       ast_type_qualifier& qualifier = member->type->qualifier;
1053       if ((qualifier.flags.i & interface_type_mask) == 0) {
1054          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1055           * "If no optional qualifier is used in a member declaration, the
1056           *  qualifier of the variable is just in, out, or uniform as declared
1057           *  by interface-qualifier."
1058           */
1059          qualifier.flags.i |= block_interface_qualifier;
1060       } else if ((qualifier.flags.i & interface_type_mask) !=
1061                  block_interface_qualifier) {
1062          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1063           * "If optional qualifiers are used, they can include interpolation
1064           *  and storage qualifiers and they must declare an input, output,
1065           *  or uniform variable consistent with the interface qualifier of
1066           *  the block."
1067           */
1068          _mesa_glsl_error(locp, state,
1069                           "uniform/in/out qualifier on "
1070                           "interface block member does not match "
1071                           "the interface block");
1072       }
1073
1074       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1075          _mesa_glsl_error(locp, state,
1076                           "invariant qualifiers can be used only "
1077                           "in interface block members for shader "
1078                           "inputs or outputs");
1079    }
1080 }
1081
1082 void
1083 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1084 {
1085    if (q->is_subroutine_decl())
1086       printf("subroutine ");
1087
1088    if (q->subroutine_list) {
1089       printf("subroutine (");
1090       q->subroutine_list->print();
1091       printf(")");
1092    }
1093
1094    if (q->flags.q.constant)
1095       printf("const ");
1096
1097    if (q->flags.q.invariant)
1098       printf("invariant ");
1099
1100    if (q->flags.q.attribute)
1101       printf("attribute ");
1102
1103    if (q->flags.q.varying)
1104       printf("varying ");
1105
1106    if (q->flags.q.in && q->flags.q.out)
1107       printf("inout ");
1108    else {
1109       if (q->flags.q.in)
1110          printf("in ");
1111
1112       if (q->flags.q.out)
1113          printf("out ");
1114    }
1115
1116    if (q->flags.q.centroid)
1117       printf("centroid ");
1118    if (q->flags.q.sample)
1119       printf("sample ");
1120    if (q->flags.q.patch)
1121       printf("patch ");
1122    if (q->flags.q.uniform)
1123       printf("uniform ");
1124    if (q->flags.q.buffer)
1125       printf("buffer ");
1126    if (q->flags.q.smooth)
1127       printf("smooth ");
1128    if (q->flags.q.flat)
1129       printf("flat ");
1130    if (q->flags.q.noperspective)
1131       printf("noperspective ");
1132 }
1133
1134
1135 void
1136 ast_node::print(void) const
1137 {
1138    printf("unhandled node ");
1139 }
1140
1141
1142 ast_node::ast_node(void)
1143 {
1144    this->location.source = 0;
1145    this->location.first_line = 0;
1146    this->location.first_column = 0;
1147    this->location.last_line = 0;
1148    this->location.last_column = 0;
1149 }
1150
1151
1152 static void
1153 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1154 {
1155    if (array_specifier)
1156       array_specifier->print();
1157 }
1158
1159
1160 void
1161 ast_compound_statement::print(void) const
1162 {
1163    printf("{\n");
1164
1165    foreach_list_typed(ast_node, ast, link, &this->statements) {
1166       ast->print();
1167    }
1168
1169    printf("}\n");
1170 }
1171
1172
1173 ast_compound_statement::ast_compound_statement(int new_scope,
1174                                                ast_node *statements)
1175 {
1176    this->new_scope = new_scope;
1177
1178    if (statements != NULL) {
1179       this->statements.push_degenerate_list_at_head(&statements->link);
1180    }
1181 }
1182
1183
1184 void
1185 ast_expression::print(void) const
1186 {
1187    switch (oper) {
1188    case ast_assign:
1189    case ast_mul_assign:
1190    case ast_div_assign:
1191    case ast_mod_assign:
1192    case ast_add_assign:
1193    case ast_sub_assign:
1194    case ast_ls_assign:
1195    case ast_rs_assign:
1196    case ast_and_assign:
1197    case ast_xor_assign:
1198    case ast_or_assign:
1199       subexpressions[0]->print();
1200       printf("%s ", operator_string(oper));
1201       subexpressions[1]->print();
1202       break;
1203
1204    case ast_field_selection:
1205       subexpressions[0]->print();
1206       printf(". %s ", primary_expression.identifier);
1207       break;
1208
1209    case ast_plus:
1210    case ast_neg:
1211    case ast_bit_not:
1212    case ast_logic_not:
1213    case ast_pre_inc:
1214    case ast_pre_dec:
1215       printf("%s ", operator_string(oper));
1216       subexpressions[0]->print();
1217       break;
1218
1219    case ast_post_inc:
1220    case ast_post_dec:
1221       subexpressions[0]->print();
1222       printf("%s ", operator_string(oper));
1223       break;
1224
1225    case ast_conditional:
1226       subexpressions[0]->print();
1227       printf("? ");
1228       subexpressions[1]->print();
1229       printf(": ");
1230       subexpressions[2]->print();
1231       break;
1232
1233    case ast_array_index:
1234       subexpressions[0]->print();
1235       printf("[ ");
1236       subexpressions[1]->print();
1237       printf("] ");
1238       break;
1239
1240    case ast_function_call: {
1241       subexpressions[0]->print();
1242       printf("( ");
1243
1244       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1245          if (&ast->link != this->expressions.get_head())
1246             printf(", ");
1247
1248          ast->print();
1249       }
1250
1251       printf(") ");
1252       break;
1253    }
1254
1255    case ast_identifier:
1256       printf("%s ", primary_expression.identifier);
1257       break;
1258
1259    case ast_int_constant:
1260       printf("%d ", primary_expression.int_constant);
1261       break;
1262
1263    case ast_uint_constant:
1264       printf("%u ", primary_expression.uint_constant);
1265       break;
1266
1267    case ast_float_constant:
1268       printf("%f ", primary_expression.float_constant);
1269       break;
1270
1271    case ast_double_constant:
1272       printf("%f ", primary_expression.double_constant);
1273       break;
1274
1275    case ast_int64_constant:
1276       printf("%" PRId64 " ", primary_expression.int64_constant);
1277       break;
1278
1279    case ast_uint64_constant:
1280       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1281       break;
1282
1283    case ast_bool_constant:
1284       printf("%s ",
1285              primary_expression.bool_constant
1286              ? "true" : "false");
1287       break;
1288
1289    case ast_sequence: {
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    case ast_aggregate: {
1302       printf("{ ");
1303       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1304          if (&ast->link != this->expressions.get_head())
1305             printf(", ");
1306
1307          ast->print();
1308       }
1309       printf("} ");
1310       break;
1311    }
1312
1313    default:
1314       assert(0);
1315       break;
1316    }
1317 }
1318
1319 ast_expression::ast_expression(int oper,
1320                                ast_expression *ex0,
1321                                ast_expression *ex1,
1322                                ast_expression *ex2) :
1323    primary_expression()
1324 {
1325    this->oper = ast_operators(oper);
1326    this->subexpressions[0] = ex0;
1327    this->subexpressions[1] = ex1;
1328    this->subexpressions[2] = ex2;
1329    this->non_lvalue_description = NULL;
1330    this->is_lhs = false;
1331 }
1332
1333
1334 void
1335 ast_expression_statement::print(void) const
1336 {
1337    if (expression)
1338       expression->print();
1339
1340    printf("; ");
1341 }
1342
1343
1344 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1345    expression(ex)
1346 {
1347    /* empty */
1348 }
1349
1350
1351 void
1352 ast_function::print(void) const
1353 {
1354    return_type->print();
1355    printf(" %s (", identifier);
1356
1357    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1358       ast->print();
1359    }
1360
1361    printf(")");
1362 }
1363
1364
1365 ast_function::ast_function(void)
1366    : return_type(NULL), identifier(NULL), is_definition(false),
1367      signature(NULL)
1368 {
1369    /* empty */
1370 }
1371
1372
1373 void
1374 ast_fully_specified_type::print(void) const
1375 {
1376    _mesa_ast_type_qualifier_print(& qualifier);
1377    specifier->print();
1378 }
1379
1380
1381 void
1382 ast_parameter_declarator::print(void) const
1383 {
1384    type->print();
1385    if (identifier)
1386       printf("%s ", identifier);
1387    ast_opt_array_dimensions_print(array_specifier);
1388 }
1389
1390
1391 void
1392 ast_function_definition::print(void) const
1393 {
1394    prototype->print();
1395    body->print();
1396 }
1397
1398
1399 void
1400 ast_declaration::print(void) const
1401 {
1402    printf("%s ", identifier);
1403    ast_opt_array_dimensions_print(array_specifier);
1404
1405    if (initializer) {
1406       printf("= ");
1407       initializer->print();
1408    }
1409 }
1410
1411
1412 ast_declaration::ast_declaration(const char *identifier,
1413                                  ast_array_specifier *array_specifier,
1414                                  ast_expression *initializer)
1415 {
1416    this->identifier = identifier;
1417    this->array_specifier = array_specifier;
1418    this->initializer = initializer;
1419 }
1420
1421
1422 void
1423 ast_declarator_list::print(void) const
1424 {
1425    assert(type || invariant);
1426
1427    if (type)
1428       type->print();
1429    else if (invariant)
1430       printf("invariant ");
1431    else
1432       printf("precise ");
1433
1434    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1435       if (&ast->link != this->declarations.get_head())
1436          printf(", ");
1437
1438       ast->print();
1439    }
1440
1441    printf("; ");
1442 }
1443
1444
1445 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1446 {
1447    this->type = type;
1448    this->invariant = false;
1449    this->precise = false;
1450 }
1451
1452 void
1453 ast_jump_statement::print(void) const
1454 {
1455    switch (mode) {
1456    case ast_continue:
1457       printf("continue; ");
1458       break;
1459    case ast_break:
1460       printf("break; ");
1461       break;
1462    case ast_return:
1463       printf("return ");
1464       if (opt_return_value)
1465          opt_return_value->print();
1466
1467       printf("; ");
1468       break;
1469    case ast_discard:
1470       printf("discard; ");
1471       break;
1472    }
1473 }
1474
1475
1476 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1477    : opt_return_value(NULL)
1478 {
1479    this->mode = ast_jump_modes(mode);
1480
1481    if (mode == ast_return)
1482       opt_return_value = return_value;
1483 }
1484
1485
1486 void
1487 ast_selection_statement::print(void) const
1488 {
1489    printf("if ( ");
1490    condition->print();
1491    printf(") ");
1492
1493    then_statement->print();
1494
1495    if (else_statement) {
1496       printf("else ");
1497       else_statement->print();
1498    }
1499 }
1500
1501
1502 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1503                                                  ast_node *then_statement,
1504                                                  ast_node *else_statement)
1505 {
1506    this->condition = condition;
1507    this->then_statement = then_statement;
1508    this->else_statement = else_statement;
1509 }
1510
1511
1512 void
1513 ast_switch_statement::print(void) const
1514 {
1515    printf("switch ( ");
1516    test_expression->print();
1517    printf(") ");
1518
1519    body->print();
1520 }
1521
1522
1523 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1524                                            ast_node *body)
1525 {
1526    this->test_expression = test_expression;
1527    this->body = body;
1528 }
1529
1530
1531 void
1532 ast_switch_body::print(void) const
1533 {
1534    printf("{\n");
1535    if (stmts != NULL) {
1536       stmts->print();
1537    }
1538    printf("}\n");
1539 }
1540
1541
1542 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1543 {
1544    this->stmts = stmts;
1545 }
1546
1547
1548 void ast_case_label::print(void) const
1549 {
1550    if (test_value != NULL) {
1551       printf("case ");
1552       test_value->print();
1553       printf(": ");
1554    } else {
1555       printf("default: ");
1556    }
1557 }
1558
1559
1560 ast_case_label::ast_case_label(ast_expression *test_value)
1561 {
1562    this->test_value = test_value;
1563 }
1564
1565
1566 void ast_case_label_list::print(void) const
1567 {
1568    foreach_list_typed(ast_node, ast, link, & this->labels) {
1569       ast->print();
1570    }
1571    printf("\n");
1572 }
1573
1574
1575 ast_case_label_list::ast_case_label_list(void)
1576 {
1577 }
1578
1579
1580 void ast_case_statement::print(void) const
1581 {
1582    labels->print();
1583    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1584       ast->print();
1585       printf("\n");
1586    }
1587 }
1588
1589
1590 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1591 {
1592    this->labels = labels;
1593 }
1594
1595
1596 void ast_case_statement_list::print(void) const
1597 {
1598    foreach_list_typed(ast_node, ast, link, & this->cases) {
1599       ast->print();
1600    }
1601 }
1602
1603
1604 ast_case_statement_list::ast_case_statement_list(void)
1605 {
1606 }
1607
1608
1609 void
1610 ast_iteration_statement::print(void) const
1611 {
1612    switch (mode) {
1613    case ast_for:
1614       printf("for( ");
1615       if (init_statement)
1616          init_statement->print();
1617       printf("; ");
1618
1619       if (condition)
1620          condition->print();
1621       printf("; ");
1622
1623       if (rest_expression)
1624          rest_expression->print();
1625       printf(") ");
1626
1627       body->print();
1628       break;
1629
1630    case ast_while:
1631       printf("while ( ");
1632       if (condition)
1633          condition->print();
1634       printf(") ");
1635       body->print();
1636       break;
1637
1638    case ast_do_while:
1639       printf("do ");
1640       body->print();
1641       printf("while ( ");
1642       if (condition)
1643          condition->print();
1644       printf("); ");
1645       break;
1646    }
1647 }
1648
1649
1650 ast_iteration_statement::ast_iteration_statement(int mode,
1651                                                  ast_node *init,
1652                                                  ast_node *condition,
1653                                                  ast_expression *rest_expression,
1654                                                  ast_node *body)
1655 {
1656    this->mode = ast_iteration_modes(mode);
1657    this->init_statement = init;
1658    this->condition = condition;
1659    this->rest_expression = rest_expression;
1660    this->body = body;
1661 }
1662
1663
1664 void
1665 ast_struct_specifier::print(void) const
1666 {
1667    printf("struct %s { ", name);
1668    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1669       ast->print();
1670    }
1671    printf("} ");
1672 }
1673
1674
1675 ast_struct_specifier::ast_struct_specifier(void *lin_ctx, const char *identifier,
1676                                            ast_declarator_list *declarator_list)
1677 {
1678    if (identifier == NULL) {
1679       /* All anonymous structs have the same name. This simplifies matching of
1680        * globals whose type is an unnamed struct.
1681        *
1682        * It also avoids a memory leak when the same shader is compiled over and
1683        * over again.
1684        */
1685       identifier = "#anon_struct";
1686    }
1687    name = identifier;
1688    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1689    is_declaration = true;
1690    layout = NULL;
1691    type = NULL;
1692 }
1693
1694 void ast_subroutine_list::print(void) const
1695 {
1696    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1697       if (&ast->link != this->declarations.get_head())
1698          printf(", ");
1699       ast->print();
1700    }
1701 }
1702
1703 static void
1704 set_shader_inout_layout(struct gl_shader *shader,
1705                      struct _mesa_glsl_parse_state *state)
1706 {
1707    /* Should have been prevented by the parser. */
1708    if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1709        shader->Stage == MESA_SHADER_VERTEX) {
1710       assert(!state->in_qualifier->flags.i);
1711    } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1712               shader->Stage != MESA_SHADER_TESS_EVAL) {
1713       assert(!state->in_qualifier->flags.i);
1714    }
1715
1716    if (shader->Stage != MESA_SHADER_COMPUTE) {
1717       /* Should have been prevented by the parser. */
1718       assert(!state->cs_input_local_size_specified);
1719       assert(!state->cs_input_local_size_variable_specified);
1720    }
1721
1722    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1723       /* Should have been prevented by the parser. */
1724       assert(!state->fs_uses_gl_fragcoord);
1725       assert(!state->fs_redeclares_gl_fragcoord);
1726       assert(!state->fs_pixel_center_integer);
1727       assert(!state->fs_origin_upper_left);
1728       assert(!state->fs_early_fragment_tests);
1729       assert(!state->fs_inner_coverage);
1730       assert(!state->fs_post_depth_coverage);
1731    }
1732
1733    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1734       if (state->out_qualifier->out_xfb_stride[i]) {
1735          unsigned xfb_stride;
1736          if (state->out_qualifier->out_xfb_stride[i]->
1737                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1738                 true)) {
1739             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1740          }
1741       }
1742    }
1743
1744    switch (shader->Stage) {
1745    case MESA_SHADER_TESS_CTRL:
1746       shader->info.TessCtrl.VerticesOut = 0;
1747       if (state->tcs_output_vertices_specified) {
1748          unsigned vertices;
1749          if (state->out_qualifier->vertices->
1750                process_qualifier_constant(state, "vertices", &vertices,
1751                                           false)) {
1752
1753             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1754             if (vertices > state->Const.MaxPatchVertices) {
1755                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1756                                 "GL_MAX_PATCH_VERTICES", vertices);
1757             }
1758             shader->info.TessCtrl.VerticesOut = vertices;
1759          }
1760       }
1761       break;
1762    case MESA_SHADER_TESS_EVAL:
1763       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1764       if (state->in_qualifier->flags.q.prim_type)
1765          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1766
1767       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1768       if (state->in_qualifier->flags.q.vertex_spacing)
1769          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1770
1771       shader->info.TessEval.VertexOrder = 0;
1772       if (state->in_qualifier->flags.q.ordering)
1773          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1774
1775       shader->info.TessEval.PointMode = -1;
1776       if (state->in_qualifier->flags.q.point_mode)
1777          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1778       break;
1779    case MESA_SHADER_GEOMETRY:
1780       shader->info.Geom.VerticesOut = -1;
1781       if (state->out_qualifier->flags.q.max_vertices) {
1782          unsigned qual_max_vertices;
1783          if (state->out_qualifier->max_vertices->
1784                process_qualifier_constant(state, "max_vertices",
1785                                           &qual_max_vertices, true)) {
1786
1787             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1788                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1789                _mesa_glsl_error(&loc, state,
1790                                 "maximum output vertices (%d) exceeds "
1791                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1792                                 qual_max_vertices);
1793             }
1794             shader->info.Geom.VerticesOut = qual_max_vertices;
1795          }
1796       }
1797
1798       if (state->gs_input_prim_type_specified) {
1799          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1800       } else {
1801          shader->info.Geom.InputType = PRIM_UNKNOWN;
1802       }
1803
1804       if (state->out_qualifier->flags.q.prim_type) {
1805          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1806       } else {
1807          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1808       }
1809
1810       shader->info.Geom.Invocations = 0;
1811       if (state->in_qualifier->flags.q.invocations) {
1812          unsigned invocations;
1813          if (state->in_qualifier->invocations->
1814                process_qualifier_constant(state, "invocations",
1815                                           &invocations, false)) {
1816
1817             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1818             if (invocations > MAX_GEOMETRY_SHADER_INVOCATIONS) {
1819                _mesa_glsl_error(&loc, state,
1820                                 "invocations (%d) exceeds "
1821                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1822                                 invocations);
1823             }
1824             shader->info.Geom.Invocations = invocations;
1825          }
1826       }
1827       break;
1828
1829    case MESA_SHADER_COMPUTE:
1830       if (state->cs_input_local_size_specified) {
1831          for (int i = 0; i < 3; i++)
1832             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1833       } else {
1834          for (int i = 0; i < 3; i++)
1835             shader->info.Comp.LocalSize[i] = 0;
1836       }
1837
1838       shader->info.Comp.LocalSizeVariable =
1839          state->cs_input_local_size_variable_specified;
1840       break;
1841
1842    case MESA_SHADER_FRAGMENT:
1843       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1844       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1845       shader->pixel_center_integer = state->fs_pixel_center_integer;
1846       shader->origin_upper_left = state->fs_origin_upper_left;
1847       shader->ARB_fragment_coord_conventions_enable =
1848          state->ARB_fragment_coord_conventions_enable;
1849       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1850       shader->InnerCoverage = state->fs_inner_coverage;
1851       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1852       shader->BlendSupport = state->fs_blend_support;
1853       break;
1854
1855    default:
1856       /* Nothing to do. */
1857       break;
1858    }
1859
1860    shader->bindless_sampler = state->bindless_sampler_specified;
1861    shader->bindless_image = state->bindless_image_specified;
1862    shader->bound_sampler = state->bound_sampler_specified;
1863    shader->bound_image = state->bound_image_specified;
1864 }
1865
1866 extern "C" {
1867
1868 static void
1869 assign_subroutine_indexes(struct gl_shader *sh,
1870                           struct _mesa_glsl_parse_state *state)
1871 {
1872    int j, k;
1873    int index = 0;
1874
1875    for (j = 0; j < state->num_subroutines; j++) {
1876       while (state->subroutines[j]->subroutine_index == -1) {
1877          for (k = 0; k < state->num_subroutines; k++) {
1878             if (state->subroutines[k]->subroutine_index == index)
1879                break;
1880             else if (k == state->num_subroutines - 1) {
1881                state->subroutines[j]->subroutine_index = index;
1882             }
1883          }
1884          index++;
1885       }
1886    }
1887 }
1888
1889 static void
1890 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1891                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1892                     struct glcpp_parser *data,
1893                     unsigned version,
1894                     bool es)
1895 {
1896    unsigned gl_version = state->ctx->Extensions.Version;
1897    gl_api api = state->ctx->API;
1898
1899    if (gl_version != 0xff) {
1900       unsigned i;
1901       for (i = 0; i < state->num_supported_versions; i++) {
1902          if (state->supported_versions[i].ver == version &&
1903              state->supported_versions[i].es == es) {
1904             gl_version = state->supported_versions[i].gl_ver;
1905             break;
1906          }
1907       }
1908
1909       if (i == state->num_supported_versions)
1910          return;
1911    }
1912
1913    if (es)
1914       api = API_OPENGLES2;
1915
1916    for (unsigned i = 0;
1917         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
1918       const _mesa_glsl_extension *extension
1919          = &_mesa_glsl_supported_extensions[i];
1920       if (extension->compatible_with_state(state, api, gl_version)) {
1921          add_builtin_define(data, extension->name, 1);
1922       }
1923    }
1924 }
1925
1926 /* Implements parsing checks that we can't do during parsing */
1927 static void
1928 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
1929 {
1930    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
1931       YYLTYPE loc;
1932       memset(&loc, 0, sizeof(loc));
1933       _mesa_glsl_error(&loc, state, "Compute shaders require "
1934                        "GLSL 4.30 or GLSL ES 3.10");
1935    }
1936 }
1937
1938 static void
1939 opt_shader_and_create_symbol_table(struct gl_context *ctx,
1940                                    struct gl_shader *shader)
1941 {
1942    assert(shader->CompileStatus != compile_failure &&
1943           !shader->ir->is_empty());
1944
1945    struct gl_shader_compiler_options *options =
1946       &ctx->Const.ShaderCompilerOptions[shader->Stage];
1947
1948    /* Do some optimization at compile time to reduce shader IR size
1949     * and reduce later work if the same shader is linked multiple times
1950     */
1951    if (ctx->Const.GLSLOptimizeConservatively) {
1952       /* Run it just once. */
1953       do_common_optimization(shader->ir, false, false, options,
1954                              ctx->Const.NativeIntegers);
1955    } else {
1956       /* Repeat it until it stops making changes. */
1957       while (do_common_optimization(shader->ir, false, false, options,
1958                                     ctx->Const.NativeIntegers))
1959          ;
1960    }
1961
1962    validate_ir_tree(shader->ir);
1963
1964    enum ir_variable_mode other;
1965    switch (shader->Stage) {
1966    case MESA_SHADER_VERTEX:
1967       other = ir_var_shader_in;
1968       break;
1969    case MESA_SHADER_FRAGMENT:
1970       other = ir_var_shader_out;
1971       break;
1972    default:
1973       /* Something invalid to ensure optimize_dead_builtin_uniforms
1974        * doesn't remove anything other than uniforms or constants.
1975        */
1976       other = ir_var_mode_count;
1977       break;
1978    }
1979
1980    optimize_dead_builtin_variables(shader->ir, other);
1981
1982    validate_ir_tree(shader->ir);
1983
1984    /* Retain any live IR, but trash the rest. */
1985    reparent_ir(shader->ir, shader->ir);
1986
1987    /* Destroy the symbol table.  Create a new symbol table that contains only
1988     * the variables and functions that still exist in the IR.  The symbol
1989     * table will be used later during linking.
1990     *
1991     * There must NOT be any freed objects still referenced by the symbol
1992     * table.  That could cause the linker to dereference freed memory.
1993     *
1994     * We don't have to worry about types or interface-types here because those
1995     * are fly-weights that are looked up by glsl_type.
1996     */
1997    foreach_in_list (ir_instruction, ir, shader->ir) {
1998       switch (ir->ir_type) {
1999       case ir_type_function:
2000          shader->symbols->add_function((ir_function *) ir);
2001          break;
2002       case ir_type_variable: {
2003          ir_variable *const var = (ir_variable *) ir;
2004
2005          if (var->data.mode != ir_var_temporary)
2006             shader->symbols->add_variable(var);
2007          break;
2008       }
2009       default:
2010          break;
2011       }
2012    }
2013
2014    _mesa_glsl_initialize_derived_variables(ctx, shader);
2015 }
2016
2017 void
2018 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2019                           bool dump_ast, bool dump_hir, bool force_recompile)
2020 {
2021    const char *source = force_recompile && shader->FallbackSource ?
2022       shader->FallbackSource : shader->Source;
2023
2024    if (!force_recompile) {
2025       if (ctx->Cache) {
2026          char buf[41];
2027          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2028                                 shader->sha1);
2029          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2030             /* We've seen this shader before and know it compiles */
2031             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2032                _mesa_sha1_format(buf, shader->sha1);
2033                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2034             }
2035             shader->CompileStatus = compile_skipped;
2036
2037             free((void *)shader->FallbackSource);
2038             shader->FallbackSource = NULL;
2039             return;
2040          }
2041       }
2042    } else {
2043       /* We should only ever end up here if a re-compile has been forced by a
2044        * shader cache miss. In which case we can skip the compile if its
2045        * already be done by a previous fallback or the initial compile call.
2046        */
2047       if (shader->CompileStatus == compile_success)
2048          return;
2049
2050       if (shader->CompileStatus == compiled_no_opts) {
2051          opt_shader_and_create_symbol_table(ctx, shader);
2052          shader->CompileStatus = compile_success;
2053          return;
2054       }
2055    }
2056
2057    struct _mesa_glsl_parse_state *state =
2058       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2059
2060    if (ctx->Const.GenerateTemporaryNames)
2061       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2062                               false, true);
2063
2064    state->error = glcpp_preprocess(state, &source, &state->info_log,
2065                                    add_builtin_defines, state, ctx);
2066
2067    if (!state->error) {
2068      _mesa_glsl_lexer_ctor(state, source);
2069      _mesa_glsl_parse(state);
2070      _mesa_glsl_lexer_dtor(state);
2071      do_late_parsing_checks(state);
2072    }
2073
2074    if (dump_ast) {
2075       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2076          ast->print();
2077       }
2078       printf("\n\n");
2079    }
2080
2081    ralloc_free(shader->ir);
2082    shader->ir = new(shader) exec_list;
2083    if (!state->error && !state->translation_unit.is_empty())
2084       _mesa_ast_to_hir(shader->ir, state);
2085
2086    if (!state->error) {
2087       validate_ir_tree(shader->ir);
2088
2089       /* Print out the unoptimized IR. */
2090       if (dump_hir) {
2091          _mesa_print_ir(stdout, shader->ir, state);
2092       }
2093    }
2094
2095    if (shader->InfoLog)
2096       ralloc_free(shader->InfoLog);
2097
2098    if (!state->error)
2099       set_shader_inout_layout(shader, state);
2100
2101    shader->symbols = new(shader->ir) glsl_symbol_table;
2102    shader->CompileStatus = state->error ? compile_failure : compile_success;
2103    shader->InfoLog = state->info_log;
2104    shader->Version = state->language_version;
2105    shader->IsES = state->es_shader;
2106
2107    if (!state->error && !shader->ir->is_empty()) {
2108       assign_subroutine_indexes(shader, state);
2109       lower_subroutine(shader->ir, state);
2110
2111       if (!ctx->Cache || force_recompile)
2112          opt_shader_and_create_symbol_table(ctx, shader);
2113       else {
2114          reparent_ir(shader->ir, shader->ir);
2115          shader->CompileStatus = compiled_no_opts;
2116       }
2117    }
2118
2119    if (!force_recompile) {
2120       free((void *)shader->FallbackSource);
2121       shader->FallbackSource = NULL;
2122    }
2123
2124    delete state->symbols;
2125    ralloc_free(state);
2126 }
2127
2128 } /* extern "C" */
2129 /**
2130  * Do the set of common optimizations passes
2131  *
2132  * \param ir                          List of instructions to be optimized
2133  * \param linked                      Is the shader linked?  This enables
2134  *                                    optimizations passes that remove code at
2135  *                                    global scope and could cause linking to
2136  *                                    fail.
2137  * \param uniform_locations_assigned  Have locations already been assigned for
2138  *                                    uniforms?  This prevents the declarations
2139  *                                    of unused uniforms from being removed.
2140  *                                    The setting of this flag only matters if
2141  *                                    \c linked is \c true.
2142  * \param options                     The driver's preferred shader options.
2143  * \param native_integers             Selects optimizations that depend on the
2144  *                                    implementations supporting integers
2145  *                                    natively (as opposed to supporting
2146  *                                    integers in floating point registers).
2147  */
2148 bool
2149 do_common_optimization(exec_list *ir, bool linked,
2150                        bool uniform_locations_assigned,
2151                        const struct gl_shader_compiler_options *options,
2152                        bool native_integers)
2153 {
2154    const bool debug = false;
2155    GLboolean progress = GL_FALSE;
2156
2157 #define OPT(PASS, ...) do {                                             \
2158       if (debug) {                                                      \
2159          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2160          const bool opt_progress = PASS(__VA_ARGS__);                   \
2161          progress = opt_progress || progress;                           \
2162          if (opt_progress)                                              \
2163             _mesa_print_ir(stderr, ir, NULL);                           \
2164          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2165                  #PASS, opt_progress ? "made" : "no");                  \
2166       } else {                                                          \
2167          progress = PASS(__VA_ARGS__) || progress;                      \
2168       }                                                                 \
2169    } while (false)
2170
2171    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2172
2173    if (linked) {
2174       OPT(do_function_inlining, ir);
2175       OPT(do_dead_functions, ir);
2176       OPT(do_structure_splitting, ir);
2177    }
2178    propagate_invariance(ir);
2179    OPT(do_if_simplification, ir);
2180    OPT(opt_flatten_nested_if_blocks, ir);
2181    OPT(opt_conditional_discard, ir);
2182    OPT(do_copy_propagation, ir);
2183    OPT(do_copy_propagation_elements, ir);
2184
2185    if (options->OptimizeForAOS && !linked)
2186       OPT(opt_flip_matrices, ir);
2187
2188    if (linked && options->OptimizeForAOS) {
2189       OPT(do_vectorize, ir);
2190    }
2191
2192    if (linked)
2193       OPT(do_dead_code, ir, uniform_locations_assigned);
2194    else
2195       OPT(do_dead_code_unlinked, ir);
2196    OPT(do_dead_code_local, ir);
2197    OPT(do_tree_grafting, ir);
2198    OPT(do_constant_propagation, ir);
2199    if (linked)
2200       OPT(do_constant_variable, ir);
2201    else
2202       OPT(do_constant_variable_unlinked, ir);
2203    OPT(do_constant_folding, ir);
2204    OPT(do_minmax_prune, ir);
2205    OPT(do_rebalance_tree, ir);
2206    OPT(do_algebraic, ir, native_integers, options);
2207    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2208        options->EmitNoCont, options->EmitNoLoops);
2209    OPT(do_vec_index_to_swizzle, ir);
2210    OPT(lower_vector_insert, ir, false);
2211    OPT(do_swizzle_swizzle, ir);
2212    OPT(do_noop_swizzle, ir);
2213
2214    OPT(optimize_split_arrays, ir, linked);
2215    OPT(optimize_redundant_jumps, ir);
2216
2217    if (options->MaxUnrollIterations) {
2218       loop_state *ls = analyze_loop_variables(ir);
2219       if (ls->loop_found) {
2220          OPT(set_loop_controls, ir, ls);
2221          OPT(unroll_loops, ir, ls, options);
2222       }
2223       delete ls;
2224    }
2225
2226 #undef OPT
2227
2228    return progress;
2229 }
2230
2231 extern "C" {
2232
2233 /**
2234  * To be called at GL teardown time, this frees compiler datastructures.
2235  *
2236  * After calling this, any previously compiled shaders and shader
2237  * programs would be invalid.  So this should happen at approximately
2238  * program exit.
2239  */
2240 void
2241 _mesa_destroy_shader_compiler(void)
2242 {
2243    _mesa_destroy_shader_compiler_caches();
2244
2245    _mesa_glsl_release_types();
2246 }
2247
2248 /**
2249  * Releases compiler caches to trade off performance for memory.
2250  *
2251  * Intended to be used with glReleaseShaderCompiler().
2252  */
2253 void
2254 _mesa_destroy_shader_compiler_caches(void)
2255 {
2256    _mesa_glsl_release_builtin_functions();
2257 }
2258
2259 }