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