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/context.h"
  30 #include "main/debug_output.h"
  31 #include "main/formats.h"
  32 #include "main/shaderobj.h"
  33 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
  34 #include "util/ralloc.h"
  35 #include "util/disk_cache.h"
  36 #include "util/mesa-sha1.h"
  37 #include "ast.h"
  38 #include "glsl_parser_extras.h"
  39 #include "glsl_parser.h"
  40 #include "ir_optimization.h"
  41 #include "loop_analysis.h"
  42 #include "builtin_functions.h"
  43
  44 /**
  45  * Format a short human-readable description of the given GLSL version.
  46  */
  47 const char *
  48 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
  49 {
  50    return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
  51                           version / 100, version % 100);
  52 }
  53
  54
  55 static const unsigned known_desktop_glsl_versions[] =
  56    { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450, 460 };
  57 static const unsigned known_desktop_gl_versions[] =
  58    {  20,  21,  30,  31,  32,  33,  40,  41,  42,  43,  44,  45, 46 };
  59
  60
  61 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
  62                                                gl_shader_stage stage,
  63                                                void *mem_ctx)
  64    : ctx(_ctx), cs_input_local_size_specified(false), cs_input_local_size(),
  65      switch_state()
  66 {
  67    assert(stage < MESA_SHADER_STAGES);
  68    this->stage = stage;
  69
  70    this->scanner = NULL;
  71    this->translation_unit.make_empty();
  72    this->symbols = new(mem_ctx) glsl_symbol_table;
  73
  74    this->linalloc = linear_alloc_parent(this, 0);
  75
  76    this->info_log = ralloc_strdup(mem_ctx, "");
  77    this->error = false;
  78    this->loop_nesting_ast = NULL;
  79
  80    this->uses_builtin_functions = false;
  81
  82    /* Set default language version and extensions */
  83    this->language_version = 110;
  84    this->forced_language_version = ctx->Const.ForceGLSLVersion;
  85    this->zero_init = ctx->Const.GLSLZeroInit;
  86    this->gl_version = 20;
  87    this->compat_shader = true;
  88    this->es_shader = false;
  89    this->ARB_texture_rectangle_enable = true;
  90
  91    /* OpenGL ES 2.0 has different defaults from desktop GL. */
  92    if (ctx->API == API_OPENGLES2) {
  93       this->language_version = 100;
  94       this->es_shader = true;
  95       this->ARB_texture_rectangle_enable = false;
  96    }
  97
  98    this->extensions = &ctx->Extensions;
  99
 100    this->Const.MaxLights = ctx->Const.MaxLights;
 101    this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
 102    this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
 103    this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
 104    this->Const.MaxVertexAttribs = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs;
 105    this->Const.MaxVertexUniformComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxUniformComponents;
 106    this->Const.MaxVertexTextureImageUnits = ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits;
 107    this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
 108    this->Const.MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
 109    this->Const.MaxFragmentUniformComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxUniformComponents;
 110    this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset;
 111    this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset;
 112
 113    this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
 114
 115    this->Const.MaxDualSourceDrawBuffers = ctx->Const.MaxDualSourceDrawBuffers;
 116
 117    /* 1.50 constants */
 118    this->Const.MaxVertexOutputComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents;
 119    this->Const.MaxGeometryInputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxInputComponents;
 120    this->Const.MaxGeometryOutputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxOutputComponents;
 121    this->Const.MaxFragmentInputComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents;
 122    this->Const.MaxGeometryTextureImageUnits = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits;
 123    this->Const.MaxGeometryOutputVertices = ctx->Const.MaxGeometryOutputVertices;
 124    this->Const.MaxGeometryTotalOutputComponents = ctx->Const.MaxGeometryTotalOutputComponents;
 125    this->Const.MaxGeometryUniformComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxUniformComponents;
 126
 127    this->Const.MaxVertexAtomicCounters = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicCounters;
 128    this->Const.MaxTessControlAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters;
 129    this->Const.MaxTessEvaluationAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicCounters;
 130    this->Const.MaxGeometryAtomicCounters = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicCounters;
 131    this->Const.MaxFragmentAtomicCounters = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
 132    this->Const.MaxComputeAtomicCounters = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicCounters;
 133    this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
 134    this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
 135    this->Const.MaxVertexAtomicCounterBuffers =
 136       ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicBuffers;
 137    this->Const.MaxTessControlAtomicCounterBuffers =
 138       ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers;
 139    this->Const.MaxTessEvaluationAtomicCounterBuffers =
 140       ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers;
 141    this->Const.MaxGeometryAtomicCounterBuffers =
 142       ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers;
 143    this->Const.MaxFragmentAtomicCounterBuffers =
 144       ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
 145    this->Const.MaxComputeAtomicCounterBuffers =
 146       ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers;
 147    this->Const.MaxCombinedAtomicCounterBuffers =
 148       ctx->Const.MaxCombinedAtomicBuffers;
 149    this->Const.MaxAtomicCounterBufferSize =
 150       ctx->Const.MaxAtomicBufferSize;
 151
 152    /* ARB_enhanced_layouts constants */
 153    this->Const.MaxTransformFeedbackBuffers = ctx->Const.MaxTransformFeedbackBuffers;
 154    this->Const.MaxTransformFeedbackInterleavedComponents = ctx->Const.MaxTransformFeedbackInterleavedComponents;
 155
 156    /* Compute shader constants */
 157    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupCount); i++)
 158       this->Const.MaxComputeWorkGroupCount[i] = ctx->Const.MaxComputeWorkGroupCount[i];
 159    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupSize); i++)
 160       this->Const.MaxComputeWorkGroupSize[i] = ctx->Const.MaxComputeWorkGroupSize[i];
 161
 162    this->Const.MaxComputeTextureImageUnits = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
 163    this->Const.MaxComputeUniformComponents = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxUniformComponents;
 164
 165    this->Const.MaxImageUnits = ctx->Const.MaxImageUnits;
 166    this->Const.MaxCombinedShaderOutputResources = ctx->Const.MaxCombinedShaderOutputResources;
 167    this->Const.MaxImageSamples = ctx->Const.MaxImageSamples;
 168    this->Const.MaxVertexImageUniforms = ctx->Const.Program[MESA_SHADER_VERTEX].MaxImageUniforms;
 169    this->Const.MaxTessControlImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms;
 170    this->Const.MaxTessEvaluationImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms;
 171    this->Const.MaxGeometryImageUniforms = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxImageUniforms;
 172    this->Const.MaxFragmentImageUniforms = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxImageUniforms;
 173    this->Const.MaxComputeImageUniforms = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
 174    this->Const.MaxCombinedImageUniforms = ctx->Const.MaxCombinedImageUniforms;
 175
 176    /* ARB_viewport_array */
 177    this->Const.MaxViewports = ctx->Const.MaxViewports;
 178
 179    /* tessellation shader constants */
 180    this->Const.MaxPatchVertices = ctx->Const.MaxPatchVertices;
 181    this->Const.MaxTessGenLevel = ctx->Const.MaxTessGenLevel;
 182    this->Const.MaxTessControlInputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents;
 183    this->Const.MaxTessControlOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents;
 184    this->Const.MaxTessControlTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits;
 185    this->Const.MaxTessEvaluationInputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents;
 186    this->Const.MaxTessEvaluationOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents;
 187    this->Const.MaxTessEvaluationTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits;
 188    this->Const.MaxTessPatchComponents = ctx->Const.MaxTessPatchComponents;
 189    this->Const.MaxTessControlTotalOutputComponents = ctx->Const.MaxTessControlTotalOutputComponents;
 190    this->Const.MaxTessControlUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents;
 191    this->Const.MaxTessEvaluationUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents;
 192
 193    /* GL 4.5 / OES_sample_variables */
 194    this->Const.MaxSamples = ctx->Const.MaxSamples;
 195
 196    this->current_function = NULL;
 197    this->toplevel_ir = NULL;
 198    this->found_return = false;
 199    this->all_invariant = false;
 200    this->user_structures = NULL;
 201    this->num_user_structures = 0;
 202    this->num_subroutines = 0;
 203    this->subroutines = NULL;
 204    this->num_subroutine_types = 0;
 205    this->subroutine_types = NULL;
 206
 207    /* supported_versions should be large enough to support the known desktop
 208     * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
 209     */
 210    STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 4) ==
 211                  ARRAY_SIZE(this->supported_versions));
 212
 213    /* Populate the list of supported GLSL versions */
 214    /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
 215     * the OpenGL 3.2 Core context is supported, this logic will need
 216     * change.  Older versions of GLSL are no longer supported
 217     * outside the compatibility contexts of 3.x.
 218     */
 219    this->num_supported_versions = 0;
 220    if (_mesa_is_desktop_gl(ctx)) {
 221       for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
 222          if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
 223             this->supported_versions[this->num_supported_versions].ver
 224                = known_desktop_glsl_versions[i];
 225             this->supported_versions[this->num_supported_versions].gl_ver
 226                = known_desktop_gl_versions[i];
 227             this->supported_versions[this->num_supported_versions].es = false;
 228             this->num_supported_versions++;
 229          }
 230       }
 231    }
 232    if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
 233       this->supported_versions[this->num_supported_versions].ver = 100;
 234       this->supported_versions[this->num_supported_versions].gl_ver = 20;
 235       this->supported_versions[this->num_supported_versions].es = true;
 236       this->num_supported_versions++;
 237    }
 238    if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
 239       this->supported_versions[this->num_supported_versions].ver = 300;
 240       this->supported_versions[this->num_supported_versions].gl_ver = 30;
 241       this->supported_versions[this->num_supported_versions].es = true;
 242       this->num_supported_versions++;
 243    }
 244    if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
 245       this->supported_versions[this->num_supported_versions].ver = 310;
 246       this->supported_versions[this->num_supported_versions].gl_ver = 31;
 247       this->supported_versions[this->num_supported_versions].es = true;
 248       this->num_supported_versions++;
 249    }
 250    if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
 251        ctx->Extensions.ARB_ES3_2_compatibility) {
 252       this->supported_versions[this->num_supported_versions].ver = 320;
 253       this->supported_versions[this->num_supported_versions].gl_ver = 32;
 254       this->supported_versions[this->num_supported_versions].es = true;
 255       this->num_supported_versions++;
 256    }
 257
 258    /* Create a string for use in error messages to tell the user which GLSL
 259     * versions are supported.
 260     */
 261    char *supported = ralloc_strdup(this, "");
 262    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 263       unsigned ver = this->supported_versions[i].ver;
 264       const char *const prefix = (i == 0)
 265          ? ""
 266          : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
 267       const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
 268
 269       ralloc_asprintf_append(& supported, "%s%u.%02u%s",
 270                              prefix,
 271                              ver / 100, ver % 100,
 272                              suffix);
 273    }
 274
 275    this->supported_version_string = supported;
 276
 277    if (ctx->Const.ForceGLSLExtensionsWarn)
 278       _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
 279
 280    this->default_uniform_qualifier = new(this) ast_type_qualifier();
 281    this->default_uniform_qualifier->flags.q.shared = 1;
 282    this->default_uniform_qualifier->flags.q.column_major = 1;
 283
 284    this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
 285    this->default_shader_storage_qualifier->flags.q.shared = 1;
 286    this->default_shader_storage_qualifier->flags.q.column_major = 1;
 287
 288    this->fs_uses_gl_fragcoord = false;
 289    this->fs_redeclares_gl_fragcoord = false;
 290    this->fs_origin_upper_left = false;
 291    this->fs_pixel_center_integer = false;
 292    this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
 293
 294    this->gs_input_prim_type_specified = false;
 295    this->tcs_output_vertices_specified = false;
 296    this->gs_input_size = 0;
 297    this->in_qualifier = new(this) ast_type_qualifier();
 298    this->out_qualifier = new(this) ast_type_qualifier();
 299    this->fs_early_fragment_tests = false;
 300    this->fs_inner_coverage = false;
 301    this->fs_post_depth_coverage = false;
 302    this->fs_pixel_interlock_ordered = false;
 303    this->fs_pixel_interlock_unordered = false;
 304    this->fs_sample_interlock_ordered = false;
 305    this->fs_sample_interlock_unordered = false;
 306    this->fs_blend_support = 0;
 307    memset(this->atomic_counter_offsets, 0,
 308           sizeof(this->atomic_counter_offsets));
 309    this->allow_extension_directive_midshader =
 310       ctx->Const.AllowGLSLExtensionDirectiveMidShader;
 311    this->allow_builtin_variable_redeclaration =
 312       ctx->Const.AllowGLSLBuiltinVariableRedeclaration;
 313
 314    this->cs_input_local_size_variable_specified = false;
 315
 316    /* ARB_bindless_texture */
 317    this->bindless_sampler_specified = false;
 318    this->bindless_image_specified = false;
 319    this->bound_sampler_specified = false;
 320    this->bound_image_specified = false;
 321 }
 322
 323 /**
 324  * Determine whether the current GLSL version is sufficiently high to support
 325  * a certain feature, and generate an error message if it isn't.
 326  *
 327  * \param required_glsl_version and \c required_glsl_es_version are
 328  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 329  *
 330  * \param locp is the parser location where the error should be reported.
 331  *
 332  * \param fmt (and additional arguments) constitute a printf-style error
 333  * message to report if the version check fails.  Information about the
 334  * current and required GLSL versions will be appended.  So, for example, if
 335  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 336  * "foo unsupported") is called, the error message will be "foo unsupported in
 337  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 338  */
 339 bool
 340 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 341                                       unsigned required_glsl_es_version,
 342                                       YYLTYPE *locp, const char *fmt, ...)
 343 {
 344    if (this->is_version(required_glsl_version, required_glsl_es_version))
 345       return true;
 346
 347    va_list args;
 348    va_start(args, fmt);
 349    char *problem = ralloc_vasprintf(this, fmt, args);
 350    va_end(args);
 351    const char *glsl_version_string
 352       = glsl_compute_version_string(this, false, required_glsl_version);
 353    const char *glsl_es_version_string
 354       = glsl_compute_version_string(this, true, required_glsl_es_version);
 355    const char *requirement_string = "";
 356    if (required_glsl_version && required_glsl_es_version) {
 357       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 358                                            glsl_version_string,
 359                                            glsl_es_version_string);
 360    } else if (required_glsl_version) {
 361       requirement_string = ralloc_asprintf(this, " (%s required)",
 362                                            glsl_version_string);
 363    } else if (required_glsl_es_version) {
 364       requirement_string = ralloc_asprintf(this, " (%s required)",
 365                                            glsl_es_version_string);
 366    }
 367    _mesa_glsl_error(locp, this, "%s in %s%s",
 368                     problem, this->get_version_string(),
 369                     requirement_string);
 370
 371    return false;
 372 }
 373
 374 /**
 375  * Process a GLSL #version directive.
 376  *
 377  * \param version is the integer that follows the #version token.
 378  *
 379  * \param ident is a string identifier that follows the integer, if any is
 380  * present.  Otherwise NULL.
 381  */
 382 void
 383 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 384                                                   const char *ident)
 385 {
 386    bool es_token_present = false;
 387    bool compat_token_present = false;
 388    if (ident) {
 389       if (strcmp(ident, "es") == 0) {
 390          es_token_present = true;
 391       } else if (version >= 150) {
 392          if (strcmp(ident, "core") == 0) {
 393             /* Accept the token.  There's no need to record that this is
 394              * a core profile shader since that's the only profile we support.
 395              */
 396          } else if (strcmp(ident, "compatibility") == 0) {
 397             compat_token_present = true;
 398
 399             if (this->ctx->API != API_OPENGL_COMPAT) {
 400                _mesa_glsl_error(locp, this,
 401                                 "the compatibility profile is not supported");
 402             }
 403          } else {
 404             _mesa_glsl_error(locp, this,
 405                              "\"%s\" is not a valid shading language profile; "
 406                              "if present, it must be \"core\"", ident);
 407          }
 408       } else {
 409          _mesa_glsl_error(locp, this,
 410                           "illegal text following version number");
 411       }
 412    }
 413
 414    this->es_shader = es_token_present;
 415    if (version == 100) {
 416       if (es_token_present) {
 417          _mesa_glsl_error(locp, this,
 418                           "GLSL 1.00 ES should be selected using "
 419                           "`#version 100'");
 420       } else {
 421          this->es_shader = true;
 422       }
 423    }
 424
 425    if (this->es_shader) {
 426       this->ARB_texture_rectangle_enable = false;
 427    }
 428
 429    if (this->forced_language_version)
 430       this->language_version = this->forced_language_version;
 431    else
 432       this->language_version = version;
 433
 434    this->compat_shader = compat_token_present ||
 435                          (this->ctx->API == API_OPENGL_COMPAT &&
 436                           this->language_version == 140) ||
 437                          (!this->es_shader && this->language_version < 140);
 438
 439    bool supported = false;
 440    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 441       if (this->supported_versions[i].ver == this->language_version
 442           && this->supported_versions[i].es == this->es_shader) {
 443          this->gl_version = this->supported_versions[i].gl_ver;
 444          supported = true;
 445          break;
 446       }
 447    }
 448
 449    if (!supported) {
 450       _mesa_glsl_error(locp, this, "%s is not supported. "
 451                        "Supported versions are: %s",
 452                        this->get_version_string(),
 453                        this->supported_version_string);
 454
 455       /* On exit, the language_version must be set to a valid value.
 456        * Later calls to _mesa_glsl_initialize_types will misbehave if
 457        * the version is invalid.
 458        */
 459       switch (this->ctx->API) {
 460       case API_OPENGL_COMPAT:
 461       case API_OPENGL_CORE:
 462          this->language_version = this->ctx->Const.GLSLVersion;
 463          break;
 464
 465       case API_OPENGLES:
 466          assert(!"Should not get here.");
 467          /* FALLTHROUGH */
 468
 469       case API_OPENGLES2:
 470          this->language_version = 100;
 471          break;
 472       }
 473    }
 474 }
 475
 476
 477 /* This helper function will append the given message to the shader's
 478    info log and report it via GL_ARB_debug_output. Per that extension,
 479    'type' is one of the enum values classifying the message, and
 480    'id' is the implementation-defined ID of the given message. */
 481 static void
 482 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 483                GLenum type, const char *fmt, va_list ap)
 484 {
 485    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 486    GLuint msg_id = 0;
 487
 488    assert(state->info_log != NULL);
 489
 490    /* Get the offset that the new message will be written to. */
 491    int msg_offset = strlen(state->info_log);
 492
 493    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 494                                             locp->source,
 495                                             locp->first_line,
 496                                             locp->first_column,
 497                                             error ? "error" : "warning");
 498    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 499
 500    const char *const msg = &state->info_log[msg_offset];
 501    struct gl_context *ctx = state->ctx;
 502
 503    /* Report the error via GL_ARB_debug_output. */
 504    _mesa_shader_debug(ctx, type, &msg_id, msg);
 505
 506    ralloc_strcat(&state->info_log, "\n");
 507 }
 508
 509 void
 510 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 511                  const char *fmt, ...)
 512 {
 513    va_list ap;
 514
 515    state->error = true;
 516
 517    va_start(ap, fmt);
 518    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 519    va_end(ap);
 520 }
 521
 522
 523 void
 524 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 525                    const char *fmt, ...)
 526 {
 527    va_list ap;
 528
 529    va_start(ap, fmt);
 530    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 531    va_end(ap);
 532 }
 533
 534
 535 /**
 536  * Enum representing the possible behaviors that can be specified in
 537  * an #extension directive.
 538  */
 539 enum ext_behavior {
 540    extension_disable,
 541    extension_enable,
 542    extension_require,
 543    extension_warn
 544 };
 545
 546 /**
 547  * Element type for _mesa_glsl_supported_extensions
 548  */
 549 struct _mesa_glsl_extension {
 550    /**
 551     * Name of the extension when referred to in a GLSL extension
 552     * statement
 553     */
 554    const char *name;
 555
 556    /**
 557     * Whether this extension is a part of AEP
 558     */
 559    bool aep;
 560
 561    /**
 562     * Predicate that checks whether the relevant extension is available for
 563     * this context.
 564     */
 565    bool (*available_pred)(const struct gl_context *,
 566                           gl_api api, uint8_t version);
 567
 568    /**
 569     * Flag in the _mesa_glsl_parse_state struct that should be set
 570     * when this extension is enabled.
 571     *
 572     * See note in _mesa_glsl_extension::supported_flag about "pointer
 573     * to member" types.
 574     */
 575    bool _mesa_glsl_parse_state::* enable_flag;
 576
 577    /**
 578     * Flag in the _mesa_glsl_parse_state struct that should be set
 579     * when the shader requests "warn" behavior for this extension.
 580     *
 581     * See note in _mesa_glsl_extension::supported_flag about "pointer
 582     * to member" types.
 583     */
 584    bool _mesa_glsl_parse_state::* warn_flag;
 585
 586
 587    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 588                               gl_api api, uint8_t gl_version) const;
 589    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 590 };
 591
 592 /** Checks if the context supports a user-facing extension */
 593 #define EXT(name_str, driver_cap, ...) \
 594 static MAYBE_UNUSED bool \
 595 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 596 { \
 597    return ctx->Extensions.driver_cap && (version >= \
 598           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 599 }
 600 #include "main/extensions_table.h"
 601 #undef EXT
 602
 603 #define EXT(NAME)                                           \
 604    { "GL_" #NAME, false, has_##NAME,                        \
 605      &_mesa_glsl_parse_state::NAME##_enable,                \
 606      &_mesa_glsl_parse_state::NAME##_warn }
 607
 608 #define EXT_AEP(NAME)                                       \
 609    { "GL_" #NAME, true, has_##NAME,                         \
 610      &_mesa_glsl_parse_state::NAME##_enable,                \
 611      &_mesa_glsl_parse_state::NAME##_warn }
 612
 613 /**
 614  * Table of extensions that can be enabled/disabled within a shader,
 615  * and the conditions under which they are supported.
 616  */
 617 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 618    /* ARB extensions go here, sorted alphabetically.
 619     */
 620    EXT(ARB_ES3_1_compatibility),
 621    EXT(ARB_ES3_2_compatibility),
 622    EXT(ARB_arrays_of_arrays),
 623    EXT(ARB_bindless_texture),
 624    EXT(ARB_compatibility),
 625    EXT(ARB_compute_shader),
 626    EXT(ARB_compute_variable_group_size),
 627    EXT(ARB_conservative_depth),
 628    EXT(ARB_cull_distance),
 629    EXT(ARB_derivative_control),
 630    EXT(ARB_draw_buffers),
 631    EXT(ARB_draw_instanced),
 632    EXT(ARB_enhanced_layouts),
 633    EXT(ARB_explicit_attrib_location),
 634    EXT(ARB_explicit_uniform_location),
 635    EXT(ARB_fragment_coord_conventions),
 636    EXT(ARB_fragment_layer_viewport),
 637    EXT(ARB_fragment_shader_interlock),
 638    EXT(ARB_gpu_shader5),
 639    EXT(ARB_gpu_shader_fp64),
 640    EXT(ARB_gpu_shader_int64),
 641    EXT(ARB_post_depth_coverage),
 642    EXT(ARB_sample_shading),
 643    EXT(ARB_separate_shader_objects),
 644    EXT(ARB_shader_atomic_counter_ops),
 645    EXT(ARB_shader_atomic_counters),
 646    EXT(ARB_shader_ballot),
 647    EXT(ARB_shader_bit_encoding),
 648    EXT(ARB_shader_clock),
 649    EXT(ARB_shader_draw_parameters),
 650    EXT(ARB_shader_group_vote),
 651    EXT(ARB_shader_image_load_store),
 652    EXT(ARB_shader_image_size),
 653    EXT(ARB_shader_precision),
 654    EXT(ARB_shader_stencil_export),
 655    EXT(ARB_shader_storage_buffer_object),
 656    EXT(ARB_shader_subroutine),
 657    EXT(ARB_shader_texture_image_samples),
 658    EXT(ARB_shader_texture_lod),
 659    EXT(ARB_shader_viewport_layer_array),
 660    EXT(ARB_shading_language_420pack),
 661    EXT(ARB_shading_language_packing),
 662    EXT(ARB_tessellation_shader),
 663    EXT(ARB_texture_cube_map_array),
 664    EXT(ARB_texture_gather),
 665    EXT(ARB_texture_multisample),
 666    EXT(ARB_texture_query_levels),
 667    EXT(ARB_texture_query_lod),
 668    EXT(ARB_texture_rectangle),
 669    EXT(ARB_uniform_buffer_object),
 670    EXT(ARB_vertex_attrib_64bit),
 671    EXT(ARB_viewport_array),
 672
 673    /* KHR extensions go here, sorted alphabetically.
 674     */
 675    EXT_AEP(KHR_blend_equation_advanced),
 676
 677    /* OES extensions go here, sorted alphabetically.
 678     */
 679    EXT(OES_EGL_image_external),
 680    EXT(OES_EGL_image_external_essl3),
 681    EXT(OES_geometry_point_size),
 682    EXT(OES_geometry_shader),
 683    EXT(OES_gpu_shader5),
 684    EXT(OES_primitive_bounding_box),
 685    EXT_AEP(OES_sample_variables),
 686    EXT_AEP(OES_shader_image_atomic),
 687    EXT(OES_shader_io_blocks),
 688    EXT_AEP(OES_shader_multisample_interpolation),
 689    EXT(OES_standard_derivatives),
 690    EXT(OES_tessellation_point_size),
 691    EXT(OES_tessellation_shader),
 692    EXT(OES_texture_3D),
 693    EXT(OES_texture_buffer),
 694    EXT(OES_texture_cube_map_array),
 695    EXT_AEP(OES_texture_storage_multisample_2d_array),
 696    EXT(OES_viewport_array),
 697
 698    /* All other extensions go here, sorted alphabetically.
 699     */
 700    EXT(AMD_conservative_depth),
 701    EXT(AMD_shader_stencil_export),
 702    EXT(AMD_shader_trinary_minmax),
 703    EXT(AMD_vertex_shader_layer),
 704    EXT(AMD_vertex_shader_viewport_index),
 705    EXT(ANDROID_extension_pack_es31a),
 706    EXT(EXT_blend_func_extended),
 707    EXT(EXT_frag_depth),
 708    EXT(EXT_draw_buffers),
 709    EXT(EXT_clip_cull_distance),
 710    EXT(EXT_geometry_point_size),
 711    EXT_AEP(EXT_geometry_shader),
 712    EXT_AEP(EXT_gpu_shader5),
 713    EXT_AEP(EXT_primitive_bounding_box),
 714    EXT(EXT_separate_shader_objects),
 715    EXT(EXT_shader_framebuffer_fetch),
 716    EXT(EXT_shader_framebuffer_fetch_non_coherent),
 717    EXT(EXT_shader_integer_mix),
 718    EXT_AEP(EXT_shader_io_blocks),
 719    EXT(EXT_shader_samples_identical),
 720    EXT(EXT_tessellation_point_size),
 721    EXT_AEP(EXT_tessellation_shader),
 722    EXT(EXT_texture_array),
 723    EXT_AEP(EXT_texture_buffer),
 724    EXT_AEP(EXT_texture_cube_map_array),
 725    EXT(INTEL_conservative_rasterization),
 726    EXT(MESA_shader_integer_functions),
 727    EXT(NV_fragment_shader_interlock),
 728    EXT(NV_image_formats),
 729 };
 730
 731 #undef EXT
 732
 733
 734 /**
 735  * Determine whether a given extension is compatible with the target,
 736  * API, and extension information in the current parser state.
 737  */
 738 bool _mesa_glsl_extension::compatible_with_state(
 739       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 740 {
 741    return this->available_pred(state->ctx, api, gl_version);
 742 }
 743
 744 /**
 745  * Set the appropriate flags in the parser state to establish the
 746  * given behavior for this extension.
 747  */
 748 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 749                                      ext_behavior behavior) const
 750 {
 751    /* Note: the ->* operator indexes into state by the
 752     * offsets this->enable_flag and this->warn_flag.  See
 753     * _mesa_glsl_extension::supported_flag for more info.
 754     */
 755    state->*(this->enable_flag) = (behavior != extension_disable);
 756    state->*(this->warn_flag)   = (behavior == extension_warn);
 757 }
 758
 759 /**
 760  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 761  * the name is not found, return NULL.
 762  */
 763 static const _mesa_glsl_extension *find_extension(const char *name)
 764 {
 765    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 766       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 767          return &_mesa_glsl_supported_extensions[i];
 768       }
 769    }
 770    return NULL;
 771 }
 772
 773 bool
 774 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 775                              const char *behavior_string, YYLTYPE *behavior_locp,
 776                              _mesa_glsl_parse_state *state)
 777 {
 778    uint8_t gl_version = state->ctx->Extensions.Version;
 779    gl_api api = state->ctx->API;
 780    ext_behavior behavior;
 781    if (strcmp(behavior_string, "warn") == 0) {
 782       behavior = extension_warn;
 783    } else if (strcmp(behavior_string, "require") == 0) {
 784       behavior = extension_require;
 785    } else if (strcmp(behavior_string, "enable") == 0) {
 786       behavior = extension_enable;
 787    } else if (strcmp(behavior_string, "disable") == 0) {
 788       behavior = extension_disable;
 789    } else {
 790       _mesa_glsl_error(behavior_locp, state,
 791                        "unknown extension behavior `%s'",
 792                        behavior_string);
 793       return false;
 794    }
 795
 796    /* If we're in a desktop context but with an ES shader, use an ES API enum
 797     * to verify extension availability.
 798     */
 799    if (state->es_shader && api != API_OPENGLES2)
 800       api = API_OPENGLES2;
 801    /* Use the language-version derived GL version to extension checks, unless
 802     * we're using meta, which sets the version to the max.
 803     */
 804    if (gl_version != 0xff)
 805       gl_version = state->gl_version;
 806
 807    if (strcmp(name, "all") == 0) {
 808       if ((behavior == extension_enable) || (behavior == extension_require)) {
 809          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 810                           (behavior == extension_enable)
 811                           ? "enable" : "require");
 812          return false;
 813       } else {
 814          for (unsigned i = 0;
 815               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 816             const _mesa_glsl_extension *extension
 817                = &_mesa_glsl_supported_extensions[i];
 818             if (extension->compatible_with_state(state, api, gl_version)) {
 819                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 820             }
 821          }
 822       }
 823    } else {
 824       const _mesa_glsl_extension *extension = find_extension(name);
 825       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 826          extension->set_flags(state, behavior);
 827          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 828             for (unsigned i = 0;
 829                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 830                const _mesa_glsl_extension *extension =
 831                   &_mesa_glsl_supported_extensions[i];
 832
 833                if (!extension->aep)
 834                   continue;
 835                /* AEP should not be enabled if all of the sub-extensions can't
 836                 * also be enabled. This is not the proper layer to do such
 837                 * error-checking though.
 838                 */
 839                assert(extension->compatible_with_state(state, api, gl_version));
 840                extension->set_flags(state, behavior);
 841             }
 842          }
 843       } else {
 844          static const char fmt[] = "extension `%s' unsupported in %s shader";
 845
 846          if (behavior == extension_require) {
 847             _mesa_glsl_error(name_locp, state, fmt,
 848                              name, _mesa_shader_stage_to_string(state->stage));
 849             return false;
 850          } else {
 851             _mesa_glsl_warning(name_locp, state, fmt,
 852                                name, _mesa_shader_stage_to_string(state->stage));
 853          }
 854       }
 855    }
 856
 857    return true;
 858 }
 859
 860
 861 /**
 862  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 863  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 864  * (process_array_constructor, et al) sufficient information to do type
 865  * checking.
 866  *
 867  * Operates on assignments involving an aggregate initializer. E.g.,
 868  *
 869  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 870  *
 871  * or more ridiculously,
 872  *
 873  * struct S {
 874  *     vec4 v[2];
 875  * };
 876  *
 877  * struct {
 878  *     S a[2], b;
 879  *     int c;
 880  * } aggregate = {
 881  *     {
 882  *         {
 883  *             {
 884  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 885  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 886  *             } // a[0].v
 887  *         }, // a[0]
 888  *         {
 889  *             {
 890  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 891  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 892  *             } // a[1].v
 893  *         } // a[1]
 894  *     }, // a
 895  *     {
 896  *         {
 897  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 898  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 899  *         } // b.v
 900  *     }, // b
 901  *     4 // c
 902  * };
 903  *
 904  * This pass is necessary because the right-hand side of <type> e = { ... }
 905  * doesn't contain sufficient information to determine if the types match.
 906  */
 907 void
 908 _mesa_ast_set_aggregate_type(const glsl_type *type,
 909                              ast_expression *expr)
 910 {
 911    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 912    ai->constructor_type = type;
 913
 914    /* If the aggregate is an array, recursively set its elements' types. */
 915    if (type->is_array()) {
 916       /* Each array element has the type type->fields.array.
 917        *
 918        * E.g., if <type> if struct S[2] we want to set each element's type to
 919        * struct S.
 920        */
 921       for (exec_node *expr_node = ai->expressions.get_head_raw();
 922            !expr_node->is_tail_sentinel();
 923            expr_node = expr_node->next) {
 924          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 925                                                link);
 926
 927          if (expr->oper == ast_aggregate)
 928             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 929       }
 930
 931    /* If the aggregate is a struct, recursively set its fields' types. */
 932    } else if (type->is_record()) {
 933       exec_node *expr_node = ai->expressions.get_head_raw();
 934
 935       /* Iterate through the struct's fields. */
 936       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 937            i++, expr_node = expr_node->next) {
 938          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 939                                                link);
 940
 941          if (expr->oper == ast_aggregate) {
 942             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 943          }
 944       }
 945    /* If the aggregate is a matrix, set its columns' types. */
 946    } else if (type->is_matrix()) {
 947       for (exec_node *expr_node = ai->expressions.get_head_raw();
 948            !expr_node->is_tail_sentinel();
 949            expr_node = expr_node->next) {
 950          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 951                                                link);
 952
 953          if (expr->oper == ast_aggregate)
 954             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 955       }
 956    }
 957 }
 958
 959 void
 960 _mesa_ast_process_interface_block(YYLTYPE *locp,
 961                                   _mesa_glsl_parse_state *state,
 962                                   ast_interface_block *const block,
 963                                   const struct ast_type_qualifier &q)
 964 {
 965    if (q.flags.q.buffer) {
 966       if (!state->has_shader_storage_buffer_objects()) {
 967          _mesa_glsl_error(locp, state,
 968                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 969                           "required for defining shader storage blocks");
 970       } else if (state->ARB_shader_storage_buffer_object_warn) {
 971          _mesa_glsl_warning(locp, state,
 972                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 973                             "required for defining shader storage blocks");
 974       }
 975    } else if (q.flags.q.uniform) {
 976       if (!state->has_uniform_buffer_objects()) {
 977          _mesa_glsl_error(locp, state,
 978                           "#version 140 / GL_ARB_uniform_buffer_object "
 979                           "required for defining uniform blocks");
 980       } else if (state->ARB_uniform_buffer_object_warn) {
 981          _mesa_glsl_warning(locp, state,
 982                             "#version 140 / GL_ARB_uniform_buffer_object "
 983                             "required for defining uniform blocks");
 984       }
 985    } else {
 986       if (!state->has_shader_io_blocks()) {
 987          if (state->es_shader) {
 988             _mesa_glsl_error(locp, state,
 989                              "GL_OES_shader_io_blocks or #version 320 "
 990                              "required for using interface blocks");
 991          } else {
 992             _mesa_glsl_error(locp, state,
 993                              "#version 150 required for using "
 994                              "interface blocks");
 995          }
 996       }
 997    }
 998
 999    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
1000     * "It is illegal to have an input block in a vertex shader
1001     *  or an output block in a fragment shader"
1002     */
1003    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
1004       _mesa_glsl_error(locp, state,
1005                        "`in' interface block is not allowed for "
1006                        "a vertex shader");
1007    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1008       _mesa_glsl_error(locp, state,
1009                        "`out' interface block is not allowed for "
1010                        "a fragment shader");
1011    }
1012
1013    /* Since block arrays require names, and both features are added in
1014     * the same language versions, we don't have to explicitly
1015     * version-check both things.
1016     */
1017    if (block->instance_name != NULL) {
1018       state->check_version(150, 300, locp, "interface blocks with "
1019                            "an instance name are not allowed");
1020    }
1021
1022    ast_type_qualifier::bitset_t interface_type_mask;
1023    struct ast_type_qualifier temp_type_qualifier;
1024
1025    /* Get a bitmask containing only the in/out/uniform/buffer
1026     * flags, allowing us to ignore other irrelevant flags like
1027     * interpolation qualifiers.
1028     */
1029    temp_type_qualifier.flags.i = 0;
1030    temp_type_qualifier.flags.q.uniform = true;
1031    temp_type_qualifier.flags.q.in = true;
1032    temp_type_qualifier.flags.q.out = true;
1033    temp_type_qualifier.flags.q.buffer = true;
1034    temp_type_qualifier.flags.q.patch = true;
1035    interface_type_mask = temp_type_qualifier.flags.i;
1036
1037    /* Get the block's interface qualifier.  The interface_qualifier
1038     * production rule guarantees that only one bit will be set (and
1039     * it will be in/out/uniform).
1040     */
1041    ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1042
1043    block->default_layout.flags.i |= block_interface_qualifier;
1044
1045    if (state->stage == MESA_SHADER_GEOMETRY &&
1046        state->has_explicit_attrib_stream() &&
1047        block->default_layout.flags.q.out) {
1048       /* Assign global layout's stream value. */
1049       block->default_layout.flags.q.stream = 1;
1050       block->default_layout.flags.q.explicit_stream = 0;
1051       block->default_layout.stream = state->out_qualifier->stream;
1052    }
1053
1054    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1055       /* Assign global layout's xfb_buffer value. */
1056       block->default_layout.flags.q.xfb_buffer = 1;
1057       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1058       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1059    }
1060
1061    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1062       ast_type_qualifier& qualifier = member->type->qualifier;
1063       if ((qualifier.flags.i & interface_type_mask) == 0) {
1064          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1065           * "If no optional qualifier is used in a member declaration, the
1066           *  qualifier of the variable is just in, out, or uniform as declared
1067           *  by interface-qualifier."
1068           */
1069          qualifier.flags.i |= block_interface_qualifier;
1070       } else if ((qualifier.flags.i & interface_type_mask) !=
1071                  block_interface_qualifier) {
1072          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1073           * "If optional qualifiers are used, they can include interpolation
1074           *  and storage qualifiers and they must declare an input, output,
1075           *  or uniform variable consistent with the interface qualifier of
1076           *  the block."
1077           */
1078          _mesa_glsl_error(locp, state,
1079                           "uniform/in/out qualifier on "
1080                           "interface block member does not match "
1081                           "the interface block");
1082       }
1083
1084       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1085          _mesa_glsl_error(locp, state,
1086                           "invariant qualifiers can be used only "
1087                           "in interface block members for shader "
1088                           "inputs or outputs");
1089    }
1090 }
1091
1092 static void
1093 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1094 {
1095    if (q->is_subroutine_decl())
1096       printf("subroutine ");
1097
1098    if (q->subroutine_list) {
1099       printf("subroutine (");
1100       q->subroutine_list->print();
1101       printf(")");
1102    }
1103
1104    if (q->flags.q.constant)
1105       printf("const ");
1106
1107    if (q->flags.q.invariant)
1108       printf("invariant ");
1109
1110    if (q->flags.q.attribute)
1111       printf("attribute ");
1112
1113    if (q->flags.q.varying)
1114       printf("varying ");
1115
1116    if (q->flags.q.in && q->flags.q.out)
1117       printf("inout ");
1118    else {
1119       if (q->flags.q.in)
1120          printf("in ");
1121
1122       if (q->flags.q.out)
1123          printf("out ");
1124    }
1125
1126    if (q->flags.q.centroid)
1127       printf("centroid ");
1128    if (q->flags.q.sample)
1129       printf("sample ");
1130    if (q->flags.q.patch)
1131       printf("patch ");
1132    if (q->flags.q.uniform)
1133       printf("uniform ");
1134    if (q->flags.q.buffer)
1135       printf("buffer ");
1136    if (q->flags.q.smooth)
1137       printf("smooth ");
1138    if (q->flags.q.flat)
1139       printf("flat ");
1140    if (q->flags.q.noperspective)
1141       printf("noperspective ");
1142 }
1143
1144
1145 void
1146 ast_node::print(void) const
1147 {
1148    printf("unhandled node ");
1149 }
1150
1151
1152 ast_node::ast_node(void)
1153 {
1154    this->location.source = 0;
1155    this->location.first_line = 0;
1156    this->location.first_column = 0;
1157    this->location.last_line = 0;
1158    this->location.last_column = 0;
1159 }
1160
1161
1162 static void
1163 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1164 {
1165    if (array_specifier)
1166       array_specifier->print();
1167 }
1168
1169
1170 void
1171 ast_compound_statement::print(void) const
1172 {
1173    printf("{\n");
1174
1175    foreach_list_typed(ast_node, ast, link, &this->statements) {
1176       ast->print();
1177    }
1178
1179    printf("}\n");
1180 }
1181
1182
1183 ast_compound_statement::ast_compound_statement(int new_scope,
1184                                                ast_node *statements)
1185 {
1186    this->new_scope = new_scope;
1187
1188    if (statements != NULL) {
1189       this->statements.push_degenerate_list_at_head(&statements->link);
1190    }
1191 }
1192
1193
1194 void
1195 ast_expression::print(void) const
1196 {
1197    switch (oper) {
1198    case ast_assign:
1199    case ast_mul_assign:
1200    case ast_div_assign:
1201    case ast_mod_assign:
1202    case ast_add_assign:
1203    case ast_sub_assign:
1204    case ast_ls_assign:
1205    case ast_rs_assign:
1206    case ast_and_assign:
1207    case ast_xor_assign:
1208    case ast_or_assign:
1209       subexpressions[0]->print();
1210       printf("%s ", operator_string(oper));
1211       subexpressions[1]->print();
1212       break;
1213
1214    case ast_field_selection:
1215       subexpressions[0]->print();
1216       printf(". %s ", primary_expression.identifier);
1217       break;
1218
1219    case ast_plus:
1220    case ast_neg:
1221    case ast_bit_not:
1222    case ast_logic_not:
1223    case ast_pre_inc:
1224    case ast_pre_dec:
1225       printf("%s ", operator_string(oper));
1226       subexpressions[0]->print();
1227       break;
1228
1229    case ast_post_inc:
1230    case ast_post_dec:
1231       subexpressions[0]->print();
1232       printf("%s ", operator_string(oper));
1233       break;
1234
1235    case ast_conditional:
1236       subexpressions[0]->print();
1237       printf("? ");
1238       subexpressions[1]->print();
1239       printf(": ");
1240       subexpressions[2]->print();
1241       break;
1242
1243    case ast_array_index:
1244       subexpressions[0]->print();
1245       printf("[ ");
1246       subexpressions[1]->print();
1247       printf("] ");
1248       break;
1249
1250    case ast_function_call: {
1251       subexpressions[0]->print();
1252       printf("( ");
1253
1254       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1255          if (&ast->link != this->expressions.get_head())
1256             printf(", ");
1257
1258          ast->print();
1259       }
1260
1261       printf(") ");
1262       break;
1263    }
1264
1265    case ast_identifier:
1266       printf("%s ", primary_expression.identifier);
1267       break;
1268
1269    case ast_int_constant:
1270       printf("%d ", primary_expression.int_constant);
1271       break;
1272
1273    case ast_uint_constant:
1274       printf("%u ", primary_expression.uint_constant);
1275       break;
1276
1277    case ast_float_constant:
1278       printf("%f ", primary_expression.float_constant);
1279       break;
1280
1281    case ast_double_constant:
1282       printf("%f ", primary_expression.double_constant);
1283       break;
1284
1285    case ast_int64_constant:
1286       printf("%" PRId64 " ", primary_expression.int64_constant);
1287       break;
1288
1289    case ast_uint64_constant:
1290       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1291       break;
1292
1293    case ast_bool_constant:
1294       printf("%s ",
1295              primary_expression.bool_constant
1296              ? "true" : "false");
1297       break;
1298
1299    case ast_sequence: {
1300       printf("( ");
1301       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1302          if (&ast->link != this->expressions.get_head())
1303             printf(", ");
1304
1305          ast->print();
1306       }
1307       printf(") ");
1308       break;
1309    }
1310
1311    case ast_aggregate: {
1312       printf("{ ");
1313       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1314          if (&ast->link != this->expressions.get_head())
1315             printf(", ");
1316
1317          ast->print();
1318       }
1319       printf("} ");
1320       break;
1321    }
1322
1323    default:
1324       assert(0);
1325       break;
1326    }
1327 }
1328
1329 ast_expression::ast_expression(int oper,
1330                                ast_expression *ex0,
1331                                ast_expression *ex1,
1332                                ast_expression *ex2) :
1333    primary_expression()
1334 {
1335    this->oper = ast_operators(oper);
1336    this->subexpressions[0] = ex0;
1337    this->subexpressions[1] = ex1;
1338    this->subexpressions[2] = ex2;
1339    this->non_lvalue_description = NULL;
1340    this->is_lhs = false;
1341 }
1342
1343
1344 void
1345 ast_expression_statement::print(void) const
1346 {
1347    if (expression)
1348       expression->print();
1349
1350    printf("; ");
1351 }
1352
1353
1354 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1355    expression(ex)
1356 {
1357    /* empty */
1358 }
1359
1360
1361 void
1362 ast_function::print(void) const
1363 {
1364    return_type->print();
1365    printf(" %s (", identifier);
1366
1367    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1368       ast->print();
1369    }
1370
1371    printf(")");
1372 }
1373
1374
1375 ast_function::ast_function(void)
1376    : return_type(NULL), identifier(NULL), is_definition(false),
1377      signature(NULL)
1378 {
1379    /* empty */
1380 }
1381
1382
1383 void
1384 ast_fully_specified_type::print(void) const
1385 {
1386    _mesa_ast_type_qualifier_print(& qualifier);
1387    specifier->print();
1388 }
1389
1390
1391 void
1392 ast_parameter_declarator::print(void) const
1393 {
1394    type->print();
1395    if (identifier)
1396       printf("%s ", identifier);
1397    ast_opt_array_dimensions_print(array_specifier);
1398 }
1399
1400
1401 void
1402 ast_function_definition::print(void) const
1403 {
1404    prototype->print();
1405    body->print();
1406 }
1407
1408
1409 void
1410 ast_declaration::print(void) const
1411 {
1412    printf("%s ", identifier);
1413    ast_opt_array_dimensions_print(array_specifier);
1414
1415    if (initializer) {
1416       printf("= ");
1417       initializer->print();
1418    }
1419 }
1420
1421
1422 ast_declaration::ast_declaration(const char *identifier,
1423                                  ast_array_specifier *array_specifier,
1424                                  ast_expression *initializer)
1425 {
1426    this->identifier = identifier;
1427    this->array_specifier = array_specifier;
1428    this->initializer = initializer;
1429 }
1430
1431
1432 void
1433 ast_declarator_list::print(void) const
1434 {
1435    assert(type || invariant);
1436
1437    if (type)
1438       type->print();
1439    else if (invariant)
1440       printf("invariant ");
1441    else
1442       printf("precise ");
1443
1444    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1445       if (&ast->link != this->declarations.get_head())
1446          printf(", ");
1447
1448       ast->print();
1449    }
1450
1451    printf("; ");
1452 }
1453
1454
1455 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1456 {
1457    this->type = type;
1458    this->invariant = false;
1459    this->precise = false;
1460 }
1461
1462 void
1463 ast_jump_statement::print(void) const
1464 {
1465    switch (mode) {
1466    case ast_continue:
1467       printf("continue; ");
1468       break;
1469    case ast_break:
1470       printf("break; ");
1471       break;
1472    case ast_return:
1473       printf("return ");
1474       if (opt_return_value)
1475          opt_return_value->print();
1476
1477       printf("; ");
1478       break;
1479    case ast_discard:
1480       printf("discard; ");
1481       break;
1482    }
1483 }
1484
1485
1486 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1487    : opt_return_value(NULL)
1488 {
1489    this->mode = ast_jump_modes(mode);
1490
1491    if (mode == ast_return)
1492       opt_return_value = return_value;
1493 }
1494
1495
1496 void
1497 ast_selection_statement::print(void) const
1498 {
1499    printf("if ( ");
1500    condition->print();
1501    printf(") ");
1502
1503    then_statement->print();
1504
1505    if (else_statement) {
1506       printf("else ");
1507       else_statement->print();
1508    }
1509 }
1510
1511
1512 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1513                                                  ast_node *then_statement,
1514                                                  ast_node *else_statement)
1515 {
1516    this->condition = condition;
1517    this->then_statement = then_statement;
1518    this->else_statement = else_statement;
1519 }
1520
1521
1522 void
1523 ast_switch_statement::print(void) const
1524 {
1525    printf("switch ( ");
1526    test_expression->print();
1527    printf(") ");
1528
1529    body->print();
1530 }
1531
1532
1533 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1534                                            ast_node *body)
1535 {
1536    this->test_expression = test_expression;
1537    this->body = body;
1538 }
1539
1540
1541 void
1542 ast_switch_body::print(void) const
1543 {
1544    printf("{\n");
1545    if (stmts != NULL) {
1546       stmts->print();
1547    }
1548    printf("}\n");
1549 }
1550
1551
1552 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1553 {
1554    this->stmts = stmts;
1555 }
1556
1557
1558 void ast_case_label::print(void) const
1559 {
1560    if (test_value != NULL) {
1561       printf("case ");
1562       test_value->print();
1563       printf(": ");
1564    } else {
1565       printf("default: ");
1566    }
1567 }
1568
1569
1570 ast_case_label::ast_case_label(ast_expression *test_value)
1571 {
1572    this->test_value = test_value;
1573 }
1574
1575
1576 void ast_case_label_list::print(void) const
1577 {
1578    foreach_list_typed(ast_node, ast, link, & this->labels) {
1579       ast->print();
1580    }
1581    printf("\n");
1582 }
1583
1584
1585 ast_case_label_list::ast_case_label_list(void)
1586 {
1587 }
1588
1589
1590 void ast_case_statement::print(void) const
1591 {
1592    labels->print();
1593    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1594       ast->print();
1595       printf("\n");
1596    }
1597 }
1598
1599
1600 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1601 {
1602    this->labels = labels;
1603 }
1604
1605
1606 void ast_case_statement_list::print(void) const
1607 {
1608    foreach_list_typed(ast_node, ast, link, & this->cases) {
1609       ast->print();
1610    }
1611 }
1612
1613
1614 ast_case_statement_list::ast_case_statement_list(void)
1615 {
1616 }
1617
1618
1619 void
1620 ast_iteration_statement::print(void) const
1621 {
1622    switch (mode) {
1623    case ast_for:
1624       printf("for( ");
1625       if (init_statement)
1626          init_statement->print();
1627       printf("; ");
1628
1629       if (condition)
1630          condition->print();
1631       printf("; ");
1632
1633       if (rest_expression)
1634          rest_expression->print();
1635       printf(") ");
1636
1637       body->print();
1638       break;
1639
1640    case ast_while:
1641       printf("while ( ");
1642       if (condition)
1643          condition->print();
1644       printf(") ");
1645       body->print();
1646       break;
1647
1648    case ast_do_while:
1649       printf("do ");
1650       body->print();
1651       printf("while ( ");
1652       if (condition)
1653          condition->print();
1654       printf("); ");
1655       break;
1656    }
1657 }
1658
1659
1660 ast_iteration_statement::ast_iteration_statement(int mode,
1661                                                  ast_node *init,
1662                                                  ast_node *condition,
1663                                                  ast_expression *rest_expression,
1664                                                  ast_node *body)
1665 {
1666    this->mode = ast_iteration_modes(mode);
1667    this->init_statement = init;
1668    this->condition = condition;
1669    this->rest_expression = rest_expression;
1670    this->body = body;
1671 }
1672
1673
1674 void
1675 ast_struct_specifier::print(void) const
1676 {
1677    printf("struct %s { ", name);
1678    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1679       ast->print();
1680    }
1681    printf("} ");
1682 }
1683
1684
1685 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1686                                            ast_declarator_list *declarator_list)
1687    : name(identifier), layout(NULL), declarations(), is_declaration(true),
1688      type(NULL)
1689 {
1690    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1691 }
1692
1693 void ast_subroutine_list::print(void) const
1694 {
1695    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1696       if (&ast->link != this->declarations.get_head())
1697          printf(", ");
1698       ast->print();
1699    }
1700 }
1701
1702 static void
1703 set_shader_inout_layout(struct gl_shader *shader,
1704                      struct _mesa_glsl_parse_state *state)
1705 {
1706    /* Should have been prevented by the parser. */
1707    if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1708        shader->Stage == MESA_SHADER_VERTEX) {
1709       assert(!state->in_qualifier->flags.i);
1710    } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1711               shader->Stage != MESA_SHADER_TESS_EVAL) {
1712       assert(!state->in_qualifier->flags.i);
1713    }
1714
1715    if (shader->Stage != MESA_SHADER_COMPUTE) {
1716       /* Should have been prevented by the parser. */
1717       assert(!state->cs_input_local_size_specified);
1718       assert(!state->cs_input_local_size_variable_specified);
1719    }
1720
1721    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1722       /* Should have been prevented by the parser. */
1723       assert(!state->fs_uses_gl_fragcoord);
1724       assert(!state->fs_redeclares_gl_fragcoord);
1725       assert(!state->fs_pixel_center_integer);
1726       assert(!state->fs_origin_upper_left);
1727       assert(!state->fs_early_fragment_tests);
1728       assert(!state->fs_inner_coverage);
1729       assert(!state->fs_post_depth_coverage);
1730       assert(!state->fs_pixel_interlock_ordered);
1731       assert(!state->fs_pixel_interlock_unordered);
1732       assert(!state->fs_sample_interlock_ordered);
1733       assert(!state->fs_sample_interlock_unordered);
1734    }
1735
1736    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1737       if (state->out_qualifier->out_xfb_stride[i]) {
1738          unsigned xfb_stride;
1739          if (state->out_qualifier->out_xfb_stride[i]->
1740                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1741                 true)) {
1742             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1743          }
1744       }
1745    }
1746
1747    switch (shader->Stage) {
1748    case MESA_SHADER_TESS_CTRL:
1749       shader->info.TessCtrl.VerticesOut = 0;
1750       if (state->tcs_output_vertices_specified) {
1751          unsigned vertices;
1752          if (state->out_qualifier->vertices->
1753                process_qualifier_constant(state, "vertices", &vertices,
1754                                           false)) {
1755
1756             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1757             if (vertices > state->Const.MaxPatchVertices) {
1758                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1759                                 "GL_MAX_PATCH_VERTICES", vertices);
1760             }
1761             shader->info.TessCtrl.VerticesOut = vertices;
1762          }
1763       }
1764       break;
1765    case MESA_SHADER_TESS_EVAL:
1766       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1767       if (state->in_qualifier->flags.q.prim_type)
1768          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1769
1770       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1771       if (state->in_qualifier->flags.q.vertex_spacing)
1772          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1773
1774       shader->info.TessEval.VertexOrder = 0;
1775       if (state->in_qualifier->flags.q.ordering)
1776          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1777
1778       shader->info.TessEval.PointMode = -1;
1779       if (state->in_qualifier->flags.q.point_mode)
1780          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1781       break;
1782    case MESA_SHADER_GEOMETRY:
1783       shader->info.Geom.VerticesOut = -1;
1784       if (state->out_qualifier->flags.q.max_vertices) {
1785          unsigned qual_max_vertices;
1786          if (state->out_qualifier->max_vertices->
1787                process_qualifier_constant(state, "max_vertices",
1788                                           &qual_max_vertices, true)) {
1789
1790             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1791                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1792                _mesa_glsl_error(&loc, state,
1793                                 "maximum output vertices (%d) exceeds "
1794                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1795                                 qual_max_vertices);
1796             }
1797             shader->info.Geom.VerticesOut = qual_max_vertices;
1798          }
1799       }
1800
1801       if (state->gs_input_prim_type_specified) {
1802          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1803       } else {
1804          shader->info.Geom.InputType = PRIM_UNKNOWN;
1805       }
1806
1807       if (state->out_qualifier->flags.q.prim_type) {
1808          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1809       } else {
1810          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1811       }
1812
1813       shader->info.Geom.Invocations = 0;
1814       if (state->in_qualifier->flags.q.invocations) {
1815          unsigned invocations;
1816          if (state->in_qualifier->invocations->
1817                process_qualifier_constant(state, "invocations",
1818                                           &invocations, false)) {
1819
1820             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1821             if (invocations > MAX_GEOMETRY_SHADER_INVOCATIONS) {
1822                _mesa_glsl_error(&loc, state,
1823                                 "invocations (%d) exceeds "
1824                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1825                                 invocations);
1826             }
1827             shader->info.Geom.Invocations = invocations;
1828          }
1829       }
1830       break;
1831
1832    case MESA_SHADER_COMPUTE:
1833       if (state->cs_input_local_size_specified) {
1834          for (int i = 0; i < 3; i++)
1835             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1836       } else {
1837          for (int i = 0; i < 3; i++)
1838             shader->info.Comp.LocalSize[i] = 0;
1839       }
1840
1841       shader->info.Comp.LocalSizeVariable =
1842          state->cs_input_local_size_variable_specified;
1843       break;
1844
1845    case MESA_SHADER_FRAGMENT:
1846       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1847       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1848       shader->pixel_center_integer = state->fs_pixel_center_integer;
1849       shader->origin_upper_left = state->fs_origin_upper_left;
1850       shader->ARB_fragment_coord_conventions_enable =
1851          state->ARB_fragment_coord_conventions_enable;
1852       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1853       shader->InnerCoverage = state->fs_inner_coverage;
1854       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1855       shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
1856       shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
1857       shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
1858       shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
1859       shader->BlendSupport = state->fs_blend_support;
1860       break;
1861
1862    default:
1863       /* Nothing to do. */
1864       break;
1865    }
1866
1867    shader->bindless_sampler = state->bindless_sampler_specified;
1868    shader->bindless_image = state->bindless_image_specified;
1869    shader->bound_sampler = state->bound_sampler_specified;
1870    shader->bound_image = state->bound_image_specified;
1871 }
1872
1873 /* src can be NULL if only the symbols found in the exec_list should be
1874  * copied
1875  */
1876 void
1877 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1878                                    struct glsl_symbol_table *src,
1879                                    struct glsl_symbol_table *dest)
1880 {
1881    foreach_in_list (ir_instruction, ir, shader_ir) {
1882       switch (ir->ir_type) {
1883       case ir_type_function:
1884          dest->add_function((ir_function *) ir);
1885          break;
1886       case ir_type_variable: {
1887          ir_variable *const var = (ir_variable *) ir;
1888
1889          if (var->data.mode != ir_var_temporary)
1890             dest->add_variable(var);
1891          break;
1892       }
1893       default:
1894          break;
1895       }
1896    }
1897
1898    if (src != NULL) {
1899       /* Explicitly copy the gl_PerVertex interface definitions because these
1900        * are needed to check they are the same during the interstage link.
1901        * They can’t necessarily be found via the exec_list because the members
1902        * might not be referenced. The GL spec still requires that they match
1903        * in that case.
1904        */
1905       const glsl_type *iface =
1906          src->get_interface("gl_PerVertex", ir_var_shader_in);
1907       if (iface)
1908          dest->add_interface(iface->name, iface, ir_var_shader_in);
1909
1910       iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1911       if (iface)
1912          dest->add_interface(iface->name, iface, ir_var_shader_out);
1913    }
1914 }
1915
1916 extern "C" {
1917
1918 static void
1919 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1920 {
1921    int j, k;
1922    int index = 0;
1923
1924    for (j = 0; j < state->num_subroutines; j++) {
1925       while (state->subroutines[j]->subroutine_index == -1) {
1926          for (k = 0; k < state->num_subroutines; k++) {
1927             if (state->subroutines[k]->subroutine_index == index)
1928                break;
1929             else if (k == state->num_subroutines - 1) {
1930                state->subroutines[j]->subroutine_index = index;
1931             }
1932          }
1933          index++;
1934       }
1935    }
1936 }
1937
1938 static void
1939 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1940                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1941                     struct glcpp_parser *data,
1942                     unsigned version,
1943                     bool es)
1944 {
1945    unsigned gl_version = state->ctx->Extensions.Version;
1946    gl_api api = state->ctx->API;
1947
1948    if (gl_version != 0xff) {
1949       unsigned i;
1950       for (i = 0; i < state->num_supported_versions; i++) {
1951          if (state->supported_versions[i].ver == version &&
1952              state->supported_versions[i].es == es) {
1953             gl_version = state->supported_versions[i].gl_ver;
1954             break;
1955          }
1956       }
1957
1958       if (i == state->num_supported_versions)
1959          return;
1960    }
1961
1962    if (es)
1963       api = API_OPENGLES2;
1964
1965    for (unsigned i = 0;
1966         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
1967       const _mesa_glsl_extension *extension
1968          = &_mesa_glsl_supported_extensions[i];
1969       if (extension->compatible_with_state(state, api, gl_version)) {
1970          add_builtin_define(data, extension->name, 1);
1971       }
1972    }
1973 }
1974
1975 /* Implements parsing checks that we can't do during parsing */
1976 static void
1977 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
1978 {
1979    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
1980       YYLTYPE loc;
1981       memset(&loc, 0, sizeof(loc));
1982       _mesa_glsl_error(&loc, state, "Compute shaders require "
1983                        "GLSL 4.30 or GLSL ES 3.10");
1984    }
1985 }
1986
1987 static void
1988 opt_shader_and_create_symbol_table(struct gl_context *ctx,
1989                                    struct glsl_symbol_table *source_symbols,
1990                                    struct gl_shader *shader)
1991 {
1992    assert(shader->CompileStatus != COMPILE_FAILURE &&
1993           !shader->ir->is_empty());
1994
1995    struct gl_shader_compiler_options *options =
1996       &ctx->Const.ShaderCompilerOptions[shader->Stage];
1997
1998    /* Do some optimization at compile time to reduce shader IR size
1999     * and reduce later work if the same shader is linked multiple times
2000     */
2001    if (ctx->Const.GLSLOptimizeConservatively) {
2002       /* Run it just once. */
2003       do_common_optimization(shader->ir, false, false, options,
2004                              ctx->Const.NativeIntegers);
2005    } else {
2006       /* Repeat it until it stops making changes. */
2007       while (do_common_optimization(shader->ir, false, false, options,
2008                                     ctx->Const.NativeIntegers))
2009          ;
2010    }
2011
2012    validate_ir_tree(shader->ir);
2013
2014    enum ir_variable_mode other;
2015    switch (shader->Stage) {
2016    case MESA_SHADER_VERTEX:
2017       other = ir_var_shader_in;
2018       break;
2019    case MESA_SHADER_FRAGMENT:
2020       other = ir_var_shader_out;
2021       break;
2022    default:
2023       /* Something invalid to ensure optimize_dead_builtin_uniforms
2024        * doesn't remove anything other than uniforms or constants.
2025        */
2026       other = ir_var_mode_count;
2027       break;
2028    }
2029
2030    optimize_dead_builtin_variables(shader->ir, other);
2031
2032    validate_ir_tree(shader->ir);
2033
2034    /* Retain any live IR, but trash the rest. */
2035    reparent_ir(shader->ir, shader->ir);
2036
2037    /* Destroy the symbol table.  Create a new symbol table that contains only
2038     * the variables and functions that still exist in the IR.  The symbol
2039     * table will be used later during linking.
2040     *
2041     * There must NOT be any freed objects still referenced by the symbol
2042     * table.  That could cause the linker to dereference freed memory.
2043     *
2044     * We don't have to worry about types or interface-types here because those
2045     * are fly-weights that are looked up by glsl_type.
2046     */
2047    _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2048                                       shader->symbols);
2049 }
2050
2051 void
2052 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2053                           bool dump_ast, bool dump_hir, bool force_recompile)
2054 {
2055    const char *source = force_recompile && shader->FallbackSource ?
2056       shader->FallbackSource : shader->Source;
2057
2058    if (!force_recompile) {
2059       if (ctx->Cache) {
2060          char buf[41];
2061          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2062                                 shader->sha1);
2063          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2064             /* We've seen this shader before and know it compiles */
2065             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2066                _mesa_sha1_format(buf, shader->sha1);
2067                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2068             }
2069             shader->CompileStatus = COMPILE_SKIPPED;
2070
2071             free((void *)shader->FallbackSource);
2072             shader->FallbackSource = NULL;
2073             return;
2074          }
2075       }
2076    } else {
2077       /* We should only ever end up here if a re-compile has been forced by a
2078        * shader cache miss. In which case we can skip the compile if its
2079        * already be done by a previous fallback or the initial compile call.
2080        */
2081       if (shader->CompileStatus == COMPILE_SUCCESS)
2082          return;
2083
2084       if (shader->CompileStatus == COMPILED_NO_OPTS) {
2085          opt_shader_and_create_symbol_table(ctx,
2086                                             NULL, /* source_symbols */
2087                                             shader);
2088          shader->CompileStatus = COMPILE_SUCCESS;
2089          return;
2090       }
2091    }
2092
2093    struct _mesa_glsl_parse_state *state =
2094       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2095
2096    if (ctx->Const.GenerateTemporaryNames)
2097       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2098                               false, true);
2099
2100    state->error = glcpp_preprocess(state, &source, &state->info_log,
2101                                    add_builtin_defines, state, ctx);
2102
2103    if (!state->error) {
2104      _mesa_glsl_lexer_ctor(state, source);
2105      _mesa_glsl_parse(state);
2106      _mesa_glsl_lexer_dtor(state);
2107      do_late_parsing_checks(state);
2108    }
2109
2110    if (dump_ast) {
2111       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2112          ast->print();
2113       }
2114       printf("\n\n");
2115    }
2116
2117    ralloc_free(shader->ir);
2118    shader->ir = new(shader) exec_list;
2119    if (!state->error && !state->translation_unit.is_empty())
2120       _mesa_ast_to_hir(shader->ir, state);
2121
2122    if (!state->error) {
2123       validate_ir_tree(shader->ir);
2124
2125       /* Print out the unoptimized IR. */
2126       if (dump_hir) {
2127          _mesa_print_ir(stdout, shader->ir, state);
2128       }
2129    }
2130
2131    if (shader->InfoLog)
2132       ralloc_free(shader->InfoLog);
2133
2134    if (!state->error)
2135       set_shader_inout_layout(shader, state);
2136
2137    shader->symbols = new(shader->ir) glsl_symbol_table;
2138    shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2139    shader->InfoLog = state->info_log;
2140    shader->Version = state->language_version;
2141    shader->IsES = state->es_shader;
2142
2143    if (!state->error && !shader->ir->is_empty()) {
2144       assign_subroutine_indexes(state);
2145       lower_subroutine(shader->ir, state);
2146
2147       if (!ctx->Cache || force_recompile)
2148          opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2149       else {
2150          reparent_ir(shader->ir, shader->ir);
2151          shader->CompileStatus = COMPILED_NO_OPTS;
2152       }
2153    }
2154
2155    if (!force_recompile) {
2156       free((void *)shader->FallbackSource);
2157       shader->FallbackSource = NULL;
2158    }
2159
2160    delete state->symbols;
2161    ralloc_free(state);
2162 }
2163
2164 } /* extern "C" */
2165 /**
2166  * Do the set of common optimizations passes
2167  *
2168  * \param ir                          List of instructions to be optimized
2169  * \param linked                      Is the shader linked?  This enables
2170  *                                    optimizations passes that remove code at
2171  *                                    global scope and could cause linking to
2172  *                                    fail.
2173  * \param uniform_locations_assigned  Have locations already been assigned for
2174  *                                    uniforms?  This prevents the declarations
2175  *                                    of unused uniforms from being removed.
2176  *                                    The setting of this flag only matters if
2177  *                                    \c linked is \c true.
2178  * \param options                     The driver's preferred shader options.
2179  * \param native_integers             Selects optimizations that depend on the
2180  *                                    implementations supporting integers
2181  *                                    natively (as opposed to supporting
2182  *                                    integers in floating point registers).
2183  */
2184 bool
2185 do_common_optimization(exec_list *ir, bool linked,
2186                        bool uniform_locations_assigned,
2187                        const struct gl_shader_compiler_options *options,
2188                        bool native_integers)
2189 {
2190    const bool debug = false;
2191    GLboolean progress = GL_FALSE;
2192
2193 #define OPT(PASS, ...) do {                                             \
2194       if (debug) {                                                      \
2195          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2196          const bool opt_progress = PASS(__VA_ARGS__);                   \
2197          progress = opt_progress || progress;                           \
2198          if (opt_progress)                                              \
2199             _mesa_print_ir(stderr, ir, NULL);                           \
2200          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2201                  #PASS, opt_progress ? "made" : "no");                  \
2202       } else {                                                          \
2203          progress = PASS(__VA_ARGS__) || progress;                      \
2204       }                                                                 \
2205    } while (false)
2206
2207    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2208
2209    if (linked) {
2210       OPT(do_function_inlining, ir);
2211       OPT(do_dead_functions, ir);
2212       OPT(do_structure_splitting, ir);
2213    }
2214    propagate_invariance(ir);
2215    OPT(do_if_simplification, ir);
2216    OPT(opt_flatten_nested_if_blocks, ir);
2217    OPT(opt_conditional_discard, ir);
2218    OPT(do_copy_propagation_elements, ir);
2219
2220    if (options->OptimizeForAOS && !linked)
2221       OPT(opt_flip_matrices, ir);
2222
2223    if (linked && options->OptimizeForAOS) {
2224       OPT(do_vectorize, ir);
2225    }
2226
2227    if (linked)
2228       OPT(do_dead_code, ir, uniform_locations_assigned);
2229    else
2230       OPT(do_dead_code_unlinked, ir);
2231    OPT(do_dead_code_local, ir);
2232    OPT(do_tree_grafting, ir);
2233    OPT(do_constant_propagation, ir);
2234    if (linked)
2235       OPT(do_constant_variable, ir);
2236    else
2237       OPT(do_constant_variable_unlinked, ir);
2238    OPT(do_constant_folding, ir);
2239    OPT(do_minmax_prune, ir);
2240    OPT(do_rebalance_tree, ir);
2241    OPT(do_algebraic, ir, native_integers, options);
2242    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2243        options->EmitNoCont, options->EmitNoLoops);
2244    OPT(do_vec_index_to_swizzle, ir);
2245    OPT(lower_vector_insert, ir, false);
2246    OPT(optimize_swizzles, ir);
2247
2248    OPT(optimize_split_arrays, ir, linked);
2249    OPT(optimize_redundant_jumps, ir);
2250
2251    if (options->MaxUnrollIterations) {
2252       loop_state *ls = analyze_loop_variables(ir);
2253       if (ls->loop_found) {
2254          bool loop_progress = unroll_loops(ir, ls, options);
2255          while (loop_progress) {
2256             loop_progress = false;
2257             loop_progress |= do_constant_propagation(ir);
2258             loop_progress |= do_if_simplification(ir);
2259
2260             /* Some drivers only call do_common_optimization() once rather
2261              * than in a loop. So we must call do_lower_jumps() after
2262              * unrolling a loop because for drivers that use LLVM validation
2263              * will fail if a jump is not the last instruction in the block.
2264              * For example the following will fail LLVM validation:
2265              *
2266              *   (loop (
2267              *      ...
2268              *   break
2269              *   (assign  (x) (var_ref v124)  (expression int + (var_ref v124)
2270              *      (constant int (1)) ) )
2271              *   ))
2272              */
2273             loop_progress |= do_lower_jumps(ir, true, true,
2274                                             options->EmitNoMainReturn,
2275                                             options->EmitNoCont,
2276                                             options->EmitNoLoops);
2277          }
2278          progress |= loop_progress;
2279       }
2280       delete ls;
2281    }
2282
2283 #undef OPT
2284
2285    return progress;
2286 }
2287
2288 extern "C" {
2289
2290 /**
2291  * To be called at GL teardown time, this frees compiler datastructures.
2292  *
2293  * After calling this, any previously compiled shaders and shader
2294  * programs would be invalid.  So this should happen at approximately
2295  * program exit.
2296  */
2297 void
2298 _mesa_destroy_shader_compiler(void)
2299 {
2300    _mesa_destroy_shader_compiler_caches();
2301
2302    _mesa_glsl_release_types();
2303 }
2304
2305 /**
2306  * Releases compiler caches to trade off performance for memory.
2307  *
2308  * Intended to be used with glReleaseShaderCompiler().
2309  */
2310 void
2311 _mesa_destroy_shader_compiler_caches(void)
2312 {
2313    _mesa_glsl_release_builtin_functions();
2314 }
2315
2316 }