src/compiler/glsl/glsl_parser_extras.cpp

   1 /*
   2  * Copyright © 2008, 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23 #include <inttypes.h> /* for PRIx64 macro */
  24 #include <stdio.h>
  25 #include <stdarg.h>
  26 #include <string.h>
  27 #include <assert.h>
  28
  29 #include "main/core.h" /* for struct gl_context */
  30 #include "main/context.h"
  31 #include "main/debug_output.h"
  32 #include "main/formats.h"
  33 #include "main/shaderobj.h"
  34 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
  35 #include "util/ralloc.h"
  36 #include "util/disk_cache.h"
  37 #include "util/mesa-sha1.h"
  38 #include "ast.h"
  39 #include "glsl_parser_extras.h"
  40 #include "glsl_parser.h"
  41 #include "ir_optimization.h"
  42 #include "loop_analysis.h"
  43 #include "builtin_functions.h"
  44
  45 /**
  46  * Format a short human-readable description of the given GLSL version.
  47  */
  48 const char *
  49 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
  50 {
  51    return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
  52                           version / 100, version % 100);
  53 }
  54
  55
  56 static const unsigned known_desktop_glsl_versions[] =
  57    { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450, 460 };
  58 static const unsigned known_desktop_gl_versions[] =
  59    {  20,  21,  30,  31,  32,  33,  40,  41,  42,  43,  44,  45, 46 };
  60
  61
  62 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
  63                                                gl_shader_stage stage,
  64                                                void *mem_ctx)
  65    : ctx(_ctx), cs_input_local_size_specified(false), cs_input_local_size(),
  66      switch_state()
  67 {
  68    assert(stage < MESA_SHADER_STAGES);
  69    this->stage = stage;
  70
  71    this->scanner = NULL;
  72    this->translation_unit.make_empty();
  73    this->symbols = new(mem_ctx) glsl_symbol_table;
  74
  75    this->linalloc = linear_alloc_parent(this, 0);
  76
  77    this->info_log = ralloc_strdup(mem_ctx, "");
  78    this->error = false;
  79    this->loop_nesting_ast = NULL;
  80
  81    this->uses_builtin_functions = false;
  82
  83    /* Set default language version and extensions */
  84    this->language_version = 110;
  85    this->forced_language_version = ctx->Const.ForceGLSLVersion;
  86    this->zero_init = ctx->Const.GLSLZeroInit;
  87    this->gl_version = 20;
  88    this->compat_shader = true;
  89    this->es_shader = false;
  90    this->ARB_texture_rectangle_enable = true;
  91
  92    /* OpenGL ES 2.0 has different defaults from desktop GL. */
  93    if (ctx->API == API_OPENGLES2) {
  94       this->language_version = 100;
  95       this->es_shader = true;
  96       this->ARB_texture_rectangle_enable = false;
  97    }
  98
  99    this->extensions = &ctx->Extensions;
 100
 101    this->Const.MaxLights = ctx->Const.MaxLights;
 102    this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
 103    this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
 104    this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
 105    this->Const.MaxVertexAttribs = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs;
 106    this->Const.MaxVertexUniformComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxUniformComponents;
 107    this->Const.MaxVertexTextureImageUnits = ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits;
 108    this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
 109    this->Const.MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
 110    this->Const.MaxFragmentUniformComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxUniformComponents;
 111    this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset;
 112    this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset;
 113
 114    this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
 115
 116    this->Const.MaxDualSourceDrawBuffers = ctx->Const.MaxDualSourceDrawBuffers;
 117
 118    /* 1.50 constants */
 119    this->Const.MaxVertexOutputComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents;
 120    this->Const.MaxGeometryInputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxInputComponents;
 121    this->Const.MaxGeometryOutputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxOutputComponents;
 122    this->Const.MaxFragmentInputComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents;
 123    this->Const.MaxGeometryTextureImageUnits = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits;
 124    this->Const.MaxGeometryOutputVertices = ctx->Const.MaxGeometryOutputVertices;
 125    this->Const.MaxGeometryTotalOutputComponents = ctx->Const.MaxGeometryTotalOutputComponents;
 126    this->Const.MaxGeometryUniformComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxUniformComponents;
 127
 128    this->Const.MaxVertexAtomicCounters = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicCounters;
 129    this->Const.MaxTessControlAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters;
 130    this->Const.MaxTessEvaluationAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicCounters;
 131    this->Const.MaxGeometryAtomicCounters = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicCounters;
 132    this->Const.MaxFragmentAtomicCounters = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
 133    this->Const.MaxComputeAtomicCounters = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicCounters;
 134    this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
 135    this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
 136    this->Const.MaxVertexAtomicCounterBuffers =
 137       ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicBuffers;
 138    this->Const.MaxTessControlAtomicCounterBuffers =
 139       ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers;
 140    this->Const.MaxTessEvaluationAtomicCounterBuffers =
 141       ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers;
 142    this->Const.MaxGeometryAtomicCounterBuffers =
 143       ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers;
 144    this->Const.MaxFragmentAtomicCounterBuffers =
 145       ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
 146    this->Const.MaxComputeAtomicCounterBuffers =
 147       ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers;
 148    this->Const.MaxCombinedAtomicCounterBuffers =
 149       ctx->Const.MaxCombinedAtomicBuffers;
 150    this->Const.MaxAtomicCounterBufferSize =
 151       ctx->Const.MaxAtomicBufferSize;
 152
 153    /* ARB_enhanced_layouts constants */
 154    this->Const.MaxTransformFeedbackBuffers = ctx->Const.MaxTransformFeedbackBuffers;
 155    this->Const.MaxTransformFeedbackInterleavedComponents = ctx->Const.MaxTransformFeedbackInterleavedComponents;
 156
 157    /* Compute shader constants */
 158    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupCount); i++)
 159       this->Const.MaxComputeWorkGroupCount[i] = ctx->Const.MaxComputeWorkGroupCount[i];
 160    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupSize); i++)
 161       this->Const.MaxComputeWorkGroupSize[i] = ctx->Const.MaxComputeWorkGroupSize[i];
 162
 163    this->Const.MaxComputeTextureImageUnits = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
 164    this->Const.MaxComputeUniformComponents = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxUniformComponents;
 165
 166    this->Const.MaxImageUnits = ctx->Const.MaxImageUnits;
 167    this->Const.MaxCombinedShaderOutputResources = ctx->Const.MaxCombinedShaderOutputResources;
 168    this->Const.MaxImageSamples = ctx->Const.MaxImageSamples;
 169    this->Const.MaxVertexImageUniforms = ctx->Const.Program[MESA_SHADER_VERTEX].MaxImageUniforms;
 170    this->Const.MaxTessControlImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms;
 171    this->Const.MaxTessEvaluationImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms;
 172    this->Const.MaxGeometryImageUniforms = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxImageUniforms;
 173    this->Const.MaxFragmentImageUniforms = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxImageUniforms;
 174    this->Const.MaxComputeImageUniforms = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
 175    this->Const.MaxCombinedImageUniforms = ctx->Const.MaxCombinedImageUniforms;
 176
 177    /* ARB_viewport_array */
 178    this->Const.MaxViewports = ctx->Const.MaxViewports;
 179
 180    /* tessellation shader constants */
 181    this->Const.MaxPatchVertices = ctx->Const.MaxPatchVertices;
 182    this->Const.MaxTessGenLevel = ctx->Const.MaxTessGenLevel;
 183    this->Const.MaxTessControlInputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents;
 184    this->Const.MaxTessControlOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents;
 185    this->Const.MaxTessControlTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits;
 186    this->Const.MaxTessEvaluationInputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents;
 187    this->Const.MaxTessEvaluationOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents;
 188    this->Const.MaxTessEvaluationTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits;
 189    this->Const.MaxTessPatchComponents = ctx->Const.MaxTessPatchComponents;
 190    this->Const.MaxTessControlTotalOutputComponents = ctx->Const.MaxTessControlTotalOutputComponents;
 191    this->Const.MaxTessControlUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents;
 192    this->Const.MaxTessEvaluationUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents;
 193
 194    /* GL 4.5 / OES_sample_variables */
 195    this->Const.MaxSamples = ctx->Const.MaxSamples;
 196
 197    this->current_function = NULL;
 198    this->toplevel_ir = NULL;
 199    this->found_return = false;
 200    this->all_invariant = false;
 201    this->user_structures = NULL;
 202    this->num_user_structures = 0;
 203    this->num_subroutines = 0;
 204    this->subroutines = NULL;
 205    this->num_subroutine_types = 0;
 206    this->subroutine_types = NULL;
 207
 208    /* supported_versions should be large enough to support the known desktop
 209     * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
 210     */
 211    STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 4) ==
 212                  ARRAY_SIZE(this->supported_versions));
 213
 214    /* Populate the list of supported GLSL versions */
 215    /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
 216     * the OpenGL 3.2 Core context is supported, this logic will need
 217     * change.  Older versions of GLSL are no longer supported
 218     * outside the compatibility contexts of 3.x.
 219     */
 220    this->num_supported_versions = 0;
 221    if (_mesa_is_desktop_gl(ctx)) {
 222       for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
 223          if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
 224             this->supported_versions[this->num_supported_versions].ver
 225                = known_desktop_glsl_versions[i];
 226             this->supported_versions[this->num_supported_versions].gl_ver
 227                = known_desktop_gl_versions[i];
 228             this->supported_versions[this->num_supported_versions].es = false;
 229             this->num_supported_versions++;
 230          }
 231       }
 232    }
 233    if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
 234       this->supported_versions[this->num_supported_versions].ver = 100;
 235       this->supported_versions[this->num_supported_versions].gl_ver = 20;
 236       this->supported_versions[this->num_supported_versions].es = true;
 237       this->num_supported_versions++;
 238    }
 239    if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
 240       this->supported_versions[this->num_supported_versions].ver = 300;
 241       this->supported_versions[this->num_supported_versions].gl_ver = 30;
 242       this->supported_versions[this->num_supported_versions].es = true;
 243       this->num_supported_versions++;
 244    }
 245    if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
 246       this->supported_versions[this->num_supported_versions].ver = 310;
 247       this->supported_versions[this->num_supported_versions].gl_ver = 31;
 248       this->supported_versions[this->num_supported_versions].es = true;
 249       this->num_supported_versions++;
 250    }
 251    if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
 252        ctx->Extensions.ARB_ES3_2_compatibility) {
 253       this->supported_versions[this->num_supported_versions].ver = 320;
 254       this->supported_versions[this->num_supported_versions].gl_ver = 32;
 255       this->supported_versions[this->num_supported_versions].es = true;
 256       this->num_supported_versions++;
 257    }
 258
 259    /* Create a string for use in error messages to tell the user which GLSL
 260     * versions are supported.
 261     */
 262    char *supported = ralloc_strdup(this, "");
 263    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 264       unsigned ver = this->supported_versions[i].ver;
 265       const char *const prefix = (i == 0)
 266          ? ""
 267          : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
 268       const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
 269
 270       ralloc_asprintf_append(& supported, "%s%u.%02u%s",
 271                              prefix,
 272                              ver / 100, ver % 100,
 273                              suffix);
 274    }
 275
 276    this->supported_version_string = supported;
 277
 278    if (ctx->Const.ForceGLSLExtensionsWarn)
 279       _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
 280
 281    this->default_uniform_qualifier = new(this) ast_type_qualifier();
 282    this->default_uniform_qualifier->flags.q.shared = 1;
 283    this->default_uniform_qualifier->flags.q.column_major = 1;
 284
 285    this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
 286    this->default_shader_storage_qualifier->flags.q.shared = 1;
 287    this->default_shader_storage_qualifier->flags.q.column_major = 1;
 288
 289    this->fs_uses_gl_fragcoord = false;
 290    this->fs_redeclares_gl_fragcoord = false;
 291    this->fs_origin_upper_left = false;
 292    this->fs_pixel_center_integer = false;
 293    this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
 294
 295    this->gs_input_prim_type_specified = false;
 296    this->tcs_output_vertices_specified = false;
 297    this->gs_input_size = 0;
 298    this->in_qualifier = new(this) ast_type_qualifier();
 299    this->out_qualifier = new(this) ast_type_qualifier();
 300    this->fs_early_fragment_tests = false;
 301    this->fs_inner_coverage = false;
 302    this->fs_post_depth_coverage = false;
 303    this->fs_blend_support = 0;
 304    memset(this->atomic_counter_offsets, 0,
 305           sizeof(this->atomic_counter_offsets));
 306    this->allow_extension_directive_midshader =
 307       ctx->Const.AllowGLSLExtensionDirectiveMidShader;
 308    this->allow_builtin_variable_redeclaration =
 309       ctx->Const.AllowGLSLBuiltinVariableRedeclaration;
 310
 311    this->cs_input_local_size_variable_specified = false;
 312
 313    /* ARB_bindless_texture */
 314    this->bindless_sampler_specified = false;
 315    this->bindless_image_specified = false;
 316    this->bound_sampler_specified = false;
 317    this->bound_image_specified = false;
 318 }
 319
 320 /**
 321  * Determine whether the current GLSL version is sufficiently high to support
 322  * a certain feature, and generate an error message if it isn't.
 323  *
 324  * \param required_glsl_version and \c required_glsl_es_version are
 325  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 326  *
 327  * \param locp is the parser location where the error should be reported.
 328  *
 329  * \param fmt (and additional arguments) constitute a printf-style error
 330  * message to report if the version check fails.  Information about the
 331  * current and required GLSL versions will be appended.  So, for example, if
 332  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 333  * "foo unsupported") is called, the error message will be "foo unsupported in
 334  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 335  */
 336 bool
 337 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 338                                       unsigned required_glsl_es_version,
 339                                       YYLTYPE *locp, const char *fmt, ...)
 340 {
 341    if (this->is_version(required_glsl_version, required_glsl_es_version))
 342       return true;
 343
 344    va_list args;
 345    va_start(args, fmt);
 346    char *problem = ralloc_vasprintf(this, fmt, args);
 347    va_end(args);
 348    const char *glsl_version_string
 349       = glsl_compute_version_string(this, false, required_glsl_version);
 350    const char *glsl_es_version_string
 351       = glsl_compute_version_string(this, true, required_glsl_es_version);
 352    const char *requirement_string = "";
 353    if (required_glsl_version && required_glsl_es_version) {
 354       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 355                                            glsl_version_string,
 356                                            glsl_es_version_string);
 357    } else if (required_glsl_version) {
 358       requirement_string = ralloc_asprintf(this, " (%s required)",
 359                                            glsl_version_string);
 360    } else if (required_glsl_es_version) {
 361       requirement_string = ralloc_asprintf(this, " (%s required)",
 362                                            glsl_es_version_string);
 363    }
 364    _mesa_glsl_error(locp, this, "%s in %s%s",
 365                     problem, this->get_version_string(),
 366                     requirement_string);
 367
 368    return false;
 369 }
 370
 371 /**
 372  * Process a GLSL #version directive.
 373  *
 374  * \param version is the integer that follows the #version token.
 375  *
 376  * \param ident is a string identifier that follows the integer, if any is
 377  * present.  Otherwise NULL.
 378  */
 379 void
 380 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 381                                                   const char *ident)
 382 {
 383    bool es_token_present = false;
 384    bool compat_token_present = false;
 385    if (ident) {
 386       if (strcmp(ident, "es") == 0) {
 387          es_token_present = true;
 388       } else if (version >= 150) {
 389          if (strcmp(ident, "core") == 0) {
 390             /* Accept the token.  There's no need to record that this is
 391              * a core profile shader since that's the only profile we support.
 392              */
 393          } else if (strcmp(ident, "compatibility") == 0) {
 394             compat_token_present = true;
 395
 396             if (this->ctx->API != API_OPENGL_COMPAT) {
 397                _mesa_glsl_error(locp, this,
 398                                 "the compatibility profile is not supported");
 399             }
 400          } else {
 401             _mesa_glsl_error(locp, this,
 402                              "\"%s\" is not a valid shading language profile; "
 403                              "if present, it must be \"core\"", ident);
 404          }
 405       } else {
 406          _mesa_glsl_error(locp, this,
 407                           "illegal text following version number");
 408       }
 409    }
 410
 411    this->es_shader = es_token_present;
 412    if (version == 100) {
 413       if (es_token_present) {
 414          _mesa_glsl_error(locp, this,
 415                           "GLSL 1.00 ES should be selected using "
 416                           "`#version 100'");
 417       } else {
 418          this->es_shader = true;
 419       }
 420    }
 421
 422    if (this->es_shader) {
 423       this->ARB_texture_rectangle_enable = false;
 424    }
 425
 426    if (this->forced_language_version)
 427       this->language_version = this->forced_language_version;
 428    else
 429       this->language_version = version;
 430
 431    this->compat_shader = compat_token_present ||
 432                          (!this->es_shader && this->language_version < 140);
 433
 434    bool supported = false;
 435    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 436       if (this->supported_versions[i].ver == this->language_version
 437           && this->supported_versions[i].es == this->es_shader) {
 438          this->gl_version = this->supported_versions[i].gl_ver;
 439          supported = true;
 440          break;
 441       }
 442    }
 443
 444    if (!supported) {
 445       _mesa_glsl_error(locp, this, "%s is not supported. "
 446                        "Supported versions are: %s",
 447                        this->get_version_string(),
 448                        this->supported_version_string);
 449
 450       /* On exit, the language_version must be set to a valid value.
 451        * Later calls to _mesa_glsl_initialize_types will misbehave if
 452        * the version is invalid.
 453        */
 454       switch (this->ctx->API) {
 455       case API_OPENGL_COMPAT:
 456       case API_OPENGL_CORE:
 457          this->language_version = this->ctx->Const.GLSLVersion;
 458          break;
 459
 460       case API_OPENGLES:
 461          assert(!"Should not get here.");
 462          /* FALLTHROUGH */
 463
 464       case API_OPENGLES2:
 465          this->language_version = 100;
 466          break;
 467       }
 468    }
 469 }
 470
 471
 472 /* This helper function will append the given message to the shader's
 473    info log and report it via GL_ARB_debug_output. Per that extension,
 474    'type' is one of the enum values classifying the message, and
 475    'id' is the implementation-defined ID of the given message. */
 476 static void
 477 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 478                GLenum type, const char *fmt, va_list ap)
 479 {
 480    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 481    GLuint msg_id = 0;
 482
 483    assert(state->info_log != NULL);
 484
 485    /* Get the offset that the new message will be written to. */
 486    int msg_offset = strlen(state->info_log);
 487
 488    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 489                                             locp->source,
 490                                             locp->first_line,
 491                                             locp->first_column,
 492                                             error ? "error" : "warning");
 493    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 494
 495    const char *const msg = &state->info_log[msg_offset];
 496    struct gl_context *ctx = state->ctx;
 497
 498    /* Report the error via GL_ARB_debug_output. */
 499    _mesa_shader_debug(ctx, type, &msg_id, msg);
 500
 501    ralloc_strcat(&state->info_log, "\n");
 502 }
 503
 504 void
 505 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 506                  const char *fmt, ...)
 507 {
 508    va_list ap;
 509
 510    state->error = true;
 511
 512    va_start(ap, fmt);
 513    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 514    va_end(ap);
 515 }
 516
 517
 518 void
 519 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 520                    const char *fmt, ...)
 521 {
 522    va_list ap;
 523
 524    va_start(ap, fmt);
 525    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 526    va_end(ap);
 527 }
 528
 529
 530 /**
 531  * Enum representing the possible behaviors that can be specified in
 532  * an #extension directive.
 533  */
 534 enum ext_behavior {
 535    extension_disable,
 536    extension_enable,
 537    extension_require,
 538    extension_warn
 539 };
 540
 541 /**
 542  * Element type for _mesa_glsl_supported_extensions
 543  */
 544 struct _mesa_glsl_extension {
 545    /**
 546     * Name of the extension when referred to in a GLSL extension
 547     * statement
 548     */
 549    const char *name;
 550
 551    /**
 552     * Whether this extension is a part of AEP
 553     */
 554    bool aep;
 555
 556    /**
 557     * Predicate that checks whether the relevant extension is available for
 558     * this context.
 559     */
 560    bool (*available_pred)(const struct gl_context *,
 561                           gl_api api, uint8_t version);
 562
 563    /**
 564     * Flag in the _mesa_glsl_parse_state struct that should be set
 565     * when this extension is enabled.
 566     *
 567     * See note in _mesa_glsl_extension::supported_flag about "pointer
 568     * to member" types.
 569     */
 570    bool _mesa_glsl_parse_state::* enable_flag;
 571
 572    /**
 573     * Flag in the _mesa_glsl_parse_state struct that should be set
 574     * when the shader requests "warn" behavior for this extension.
 575     *
 576     * See note in _mesa_glsl_extension::supported_flag about "pointer
 577     * to member" types.
 578     */
 579    bool _mesa_glsl_parse_state::* warn_flag;
 580
 581
 582    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 583                               gl_api api, uint8_t gl_version) const;
 584    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 585 };
 586
 587 /** Checks if the context supports a user-facing extension */
 588 #define EXT(name_str, driver_cap, ...) \
 589 static MAYBE_UNUSED bool \
 590 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 591 { \
 592    return ctx->Extensions.driver_cap && (version >= \
 593           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 594 }
 595 #include "main/extensions_table.h"
 596 #undef EXT
 597
 598 #define EXT(NAME)                                           \
 599    { "GL_" #NAME, false, has_##NAME,                        \
 600      &_mesa_glsl_parse_state::NAME##_enable,                \
 601      &_mesa_glsl_parse_state::NAME##_warn }
 602
 603 #define EXT_AEP(NAME)                                       \
 604    { "GL_" #NAME, true, has_##NAME,                         \
 605      &_mesa_glsl_parse_state::NAME##_enable,                \
 606      &_mesa_glsl_parse_state::NAME##_warn }
 607
 608 /**
 609  * Table of extensions that can be enabled/disabled within a shader,
 610  * and the conditions under which they are supported.
 611  */
 612 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 613    /* ARB extensions go here, sorted alphabetically.
 614     */
 615    EXT(ARB_ES3_1_compatibility),
 616    EXT(ARB_ES3_2_compatibility),
 617    EXT(ARB_arrays_of_arrays),
 618    EXT(ARB_bindless_texture),
 619    EXT(ARB_compatibility),
 620    EXT(ARB_compute_shader),
 621    EXT(ARB_compute_variable_group_size),
 622    EXT(ARB_conservative_depth),
 623    EXT(ARB_cull_distance),
 624    EXT(ARB_derivative_control),
 625    EXT(ARB_draw_buffers),
 626    EXT(ARB_draw_instanced),
 627    EXT(ARB_enhanced_layouts),
 628    EXT(ARB_explicit_attrib_location),
 629    EXT(ARB_explicit_uniform_location),
 630    EXT(ARB_fragment_coord_conventions),
 631    EXT(ARB_fragment_layer_viewport),
 632    EXT(ARB_gpu_shader5),
 633    EXT(ARB_gpu_shader_fp64),
 634    EXT(ARB_gpu_shader_int64),
 635    EXT(ARB_post_depth_coverage),
 636    EXT(ARB_sample_shading),
 637    EXT(ARB_separate_shader_objects),
 638    EXT(ARB_shader_atomic_counter_ops),
 639    EXT(ARB_shader_atomic_counters),
 640    EXT(ARB_shader_ballot),
 641    EXT(ARB_shader_bit_encoding),
 642    EXT(ARB_shader_clock),
 643    EXT(ARB_shader_draw_parameters),
 644    EXT(ARB_shader_group_vote),
 645    EXT(ARB_shader_image_load_store),
 646    EXT(ARB_shader_image_size),
 647    EXT(ARB_shader_precision),
 648    EXT(ARB_shader_stencil_export),
 649    EXT(ARB_shader_storage_buffer_object),
 650    EXT(ARB_shader_subroutine),
 651    EXT(ARB_shader_texture_image_samples),
 652    EXT(ARB_shader_texture_lod),
 653    EXT(ARB_shader_viewport_layer_array),
 654    EXT(ARB_shading_language_420pack),
 655    EXT(ARB_shading_language_packing),
 656    EXT(ARB_tessellation_shader),
 657    EXT(ARB_texture_cube_map_array),
 658    EXT(ARB_texture_gather),
 659    EXT(ARB_texture_multisample),
 660    EXT(ARB_texture_query_levels),
 661    EXT(ARB_texture_query_lod),
 662    EXT(ARB_texture_rectangle),
 663    EXT(ARB_uniform_buffer_object),
 664    EXT(ARB_vertex_attrib_64bit),
 665    EXT(ARB_viewport_array),
 666
 667    /* KHR extensions go here, sorted alphabetically.
 668     */
 669    EXT_AEP(KHR_blend_equation_advanced),
 670
 671    /* OES extensions go here, sorted alphabetically.
 672     */
 673    EXT(OES_EGL_image_external),
 674    EXT(OES_EGL_image_external_essl3),
 675    EXT(OES_geometry_point_size),
 676    EXT(OES_geometry_shader),
 677    EXT(OES_gpu_shader5),
 678    EXT(OES_primitive_bounding_box),
 679    EXT_AEP(OES_sample_variables),
 680    EXT_AEP(OES_shader_image_atomic),
 681    EXT(OES_shader_io_blocks),
 682    EXT_AEP(OES_shader_multisample_interpolation),
 683    EXT(OES_standard_derivatives),
 684    EXT(OES_tessellation_point_size),
 685    EXT(OES_tessellation_shader),
 686    EXT(OES_texture_3D),
 687    EXT(OES_texture_buffer),
 688    EXT(OES_texture_cube_map_array),
 689    EXT_AEP(OES_texture_storage_multisample_2d_array),
 690    EXT(OES_viewport_array),
 691
 692    /* All other extensions go here, sorted alphabetically.
 693     */
 694    EXT(AMD_conservative_depth),
 695    EXT(AMD_shader_stencil_export),
 696    EXT(AMD_shader_trinary_minmax),
 697    EXT(AMD_vertex_shader_layer),
 698    EXT(AMD_vertex_shader_viewport_index),
 699    EXT(ANDROID_extension_pack_es31a),
 700    EXT(EXT_blend_func_extended),
 701    EXT(EXT_frag_depth),
 702    EXT(EXT_draw_buffers),
 703    EXT(EXT_clip_cull_distance),
 704    EXT(EXT_geometry_point_size),
 705    EXT_AEP(EXT_geometry_shader),
 706    EXT_AEP(EXT_gpu_shader5),
 707    EXT_AEP(EXT_primitive_bounding_box),
 708    EXT(EXT_separate_shader_objects),
 709    EXT(EXT_shader_framebuffer_fetch),
 710    EXT(EXT_shader_framebuffer_fetch_non_coherent),
 711    EXT(EXT_shader_integer_mix),
 712    EXT_AEP(EXT_shader_io_blocks),
 713    EXT(EXT_shader_samples_identical),
 714    EXT(EXT_tessellation_point_size),
 715    EXT_AEP(EXT_tessellation_shader),
 716    EXT(EXT_texture_array),
 717    EXT_AEP(EXT_texture_buffer),
 718    EXT_AEP(EXT_texture_cube_map_array),
 719    EXT(INTEL_conservative_rasterization),
 720    EXT(MESA_shader_integer_functions),
 721    EXT(NV_image_formats),
 722 };
 723
 724 #undef EXT
 725
 726
 727 /**
 728  * Determine whether a given extension is compatible with the target,
 729  * API, and extension information in the current parser state.
 730  */
 731 bool _mesa_glsl_extension::compatible_with_state(
 732       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 733 {
 734    return this->available_pred(state->ctx, api, gl_version);
 735 }
 736
 737 /**
 738  * Set the appropriate flags in the parser state to establish the
 739  * given behavior for this extension.
 740  */
 741 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 742                                      ext_behavior behavior) const
 743 {
 744    /* Note: the ->* operator indexes into state by the
 745     * offsets this->enable_flag and this->warn_flag.  See
 746     * _mesa_glsl_extension::supported_flag for more info.
 747     */
 748    state->*(this->enable_flag) = (behavior != extension_disable);
 749    state->*(this->warn_flag)   = (behavior == extension_warn);
 750 }
 751
 752 /**
 753  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 754  * the name is not found, return NULL.
 755  */
 756 static const _mesa_glsl_extension *find_extension(const char *name)
 757 {
 758    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 759       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 760          return &_mesa_glsl_supported_extensions[i];
 761       }
 762    }
 763    return NULL;
 764 }
 765
 766 bool
 767 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 768                              const char *behavior_string, YYLTYPE *behavior_locp,
 769                              _mesa_glsl_parse_state *state)
 770 {
 771    uint8_t gl_version = state->ctx->Extensions.Version;
 772    gl_api api = state->ctx->API;
 773    ext_behavior behavior;
 774    if (strcmp(behavior_string, "warn") == 0) {
 775       behavior = extension_warn;
 776    } else if (strcmp(behavior_string, "require") == 0) {
 777       behavior = extension_require;
 778    } else if (strcmp(behavior_string, "enable") == 0) {
 779       behavior = extension_enable;
 780    } else if (strcmp(behavior_string, "disable") == 0) {
 781       behavior = extension_disable;
 782    } else {
 783       _mesa_glsl_error(behavior_locp, state,
 784                        "unknown extension behavior `%s'",
 785                        behavior_string);
 786       return false;
 787    }
 788
 789    /* If we're in a desktop context but with an ES shader, use an ES API enum
 790     * to verify extension availability.
 791     */
 792    if (state->es_shader && api != API_OPENGLES2)
 793       api = API_OPENGLES2;
 794    /* Use the language-version derived GL version to extension checks, unless
 795     * we're using meta, which sets the version to the max.
 796     */
 797    if (gl_version != 0xff)
 798       gl_version = state->gl_version;
 799
 800    if (strcmp(name, "all") == 0) {
 801       if ((behavior == extension_enable) || (behavior == extension_require)) {
 802          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 803                           (behavior == extension_enable)
 804                           ? "enable" : "require");
 805          return false;
 806       } else {
 807          for (unsigned i = 0;
 808               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 809             const _mesa_glsl_extension *extension
 810                = &_mesa_glsl_supported_extensions[i];
 811             if (extension->compatible_with_state(state, api, gl_version)) {
 812                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 813             }
 814          }
 815       }
 816    } else {
 817       const _mesa_glsl_extension *extension = find_extension(name);
 818       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 819          extension->set_flags(state, behavior);
 820          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 821             for (unsigned i = 0;
 822                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 823                const _mesa_glsl_extension *extension =
 824                   &_mesa_glsl_supported_extensions[i];
 825
 826                if (!extension->aep)
 827                   continue;
 828                /* AEP should not be enabled if all of the sub-extensions can't
 829                 * also be enabled. This is not the proper layer to do such
 830                 * error-checking though.
 831                 */
 832                assert(extension->compatible_with_state(state, api, gl_version));
 833                extension->set_flags(state, behavior);
 834             }
 835          }
 836       } else {
 837          static const char fmt[] = "extension `%s' unsupported in %s shader";
 838
 839          if (behavior == extension_require) {
 840             _mesa_glsl_error(name_locp, state, fmt,
 841                              name, _mesa_shader_stage_to_string(state->stage));
 842             return false;
 843          } else {
 844             _mesa_glsl_warning(name_locp, state, fmt,
 845                                name, _mesa_shader_stage_to_string(state->stage));
 846          }
 847       }
 848    }
 849
 850    return true;
 851 }
 852
 853
 854 /**
 855  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 856  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 857  * (process_array_constructor, et al) sufficient information to do type
 858  * checking.
 859  *
 860  * Operates on assignments involving an aggregate initializer. E.g.,
 861  *
 862  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 863  *
 864  * or more ridiculously,
 865  *
 866  * struct S {
 867  *     vec4 v[2];
 868  * };
 869  *
 870  * struct {
 871  *     S a[2], b;
 872  *     int c;
 873  * } aggregate = {
 874  *     {
 875  *         {
 876  *             {
 877  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 878  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 879  *             } // a[0].v
 880  *         }, // a[0]
 881  *         {
 882  *             {
 883  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 884  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 885  *             } // a[1].v
 886  *         } // a[1]
 887  *     }, // a
 888  *     {
 889  *         {
 890  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 891  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 892  *         } // b.v
 893  *     }, // b
 894  *     4 // c
 895  * };
 896  *
 897  * This pass is necessary because the right-hand side of <type> e = { ... }
 898  * doesn't contain sufficient information to determine if the types match.
 899  */
 900 void
 901 _mesa_ast_set_aggregate_type(const glsl_type *type,
 902                              ast_expression *expr)
 903 {
 904    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 905    ai->constructor_type = type;
 906
 907    /* If the aggregate is an array, recursively set its elements' types. */
 908    if (type->is_array()) {
 909       /* Each array element has the type type->fields.array.
 910        *
 911        * E.g., if <type> if struct S[2] we want to set each element's type to
 912        * struct S.
 913        */
 914       for (exec_node *expr_node = ai->expressions.get_head_raw();
 915            !expr_node->is_tail_sentinel();
 916            expr_node = expr_node->next) {
 917          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 918                                                link);
 919
 920          if (expr->oper == ast_aggregate)
 921             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 922       }
 923
 924    /* If the aggregate is a struct, recursively set its fields' types. */
 925    } else if (type->is_record()) {
 926       exec_node *expr_node = ai->expressions.get_head_raw();
 927
 928       /* Iterate through the struct's fields. */
 929       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 930            i++, expr_node = expr_node->next) {
 931          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 932                                                link);
 933
 934          if (expr->oper == ast_aggregate) {
 935             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 936          }
 937       }
 938    /* If the aggregate is a matrix, set its columns' types. */
 939    } else if (type->is_matrix()) {
 940       for (exec_node *expr_node = ai->expressions.get_head_raw();
 941            !expr_node->is_tail_sentinel();
 942            expr_node = expr_node->next) {
 943          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 944                                                link);
 945
 946          if (expr->oper == ast_aggregate)
 947             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 948       }
 949    }
 950 }
 951
 952 void
 953 _mesa_ast_process_interface_block(YYLTYPE *locp,
 954                                   _mesa_glsl_parse_state *state,
 955                                   ast_interface_block *const block,
 956                                   const struct ast_type_qualifier &q)
 957 {
 958    if (q.flags.q.buffer) {
 959       if (!state->has_shader_storage_buffer_objects()) {
 960          _mesa_glsl_error(locp, state,
 961                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 962                           "required for defining shader storage blocks");
 963       } else if (state->ARB_shader_storage_buffer_object_warn) {
 964          _mesa_glsl_warning(locp, state,
 965                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 966                             "required for defining shader storage blocks");
 967       }
 968    } else if (q.flags.q.uniform) {
 969       if (!state->has_uniform_buffer_objects()) {
 970          _mesa_glsl_error(locp, state,
 971                           "#version 140 / GL_ARB_uniform_buffer_object "
 972                           "required for defining uniform blocks");
 973       } else if (state->ARB_uniform_buffer_object_warn) {
 974          _mesa_glsl_warning(locp, state,
 975                             "#version 140 / GL_ARB_uniform_buffer_object "
 976                             "required for defining uniform blocks");
 977       }
 978    } else {
 979       if (!state->has_shader_io_blocks()) {
 980          if (state->es_shader) {
 981             _mesa_glsl_error(locp, state,
 982                              "GL_OES_shader_io_blocks or #version 320 "
 983                              "required for using interface blocks");
 984          } else {
 985             _mesa_glsl_error(locp, state,
 986                              "#version 150 required for using "
 987                              "interface blocks");
 988          }
 989       }
 990    }
 991
 992    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
 993     * "It is illegal to have an input block in a vertex shader
 994     *  or an output block in a fragment shader"
 995     */
 996    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
 997       _mesa_glsl_error(locp, state,
 998                        "`in' interface block is not allowed for "
 999                        "a vertex shader");
1000    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1001       _mesa_glsl_error(locp, state,
1002                        "`out' interface block is not allowed for "
1003                        "a fragment shader");
1004    }
1005
1006    /* Since block arrays require names, and both features are added in
1007     * the same language versions, we don't have to explicitly
1008     * version-check both things.
1009     */
1010    if (block->instance_name != NULL) {
1011       state->check_version(150, 300, locp, "interface blocks with "
1012                            "an instance name are not allowed");
1013    }
1014
1015    ast_type_qualifier::bitset_t interface_type_mask;
1016    struct ast_type_qualifier temp_type_qualifier;
1017
1018    /* Get a bitmask containing only the in/out/uniform/buffer
1019     * flags, allowing us to ignore other irrelevant flags like
1020     * interpolation qualifiers.
1021     */
1022    temp_type_qualifier.flags.i = 0;
1023    temp_type_qualifier.flags.q.uniform = true;
1024    temp_type_qualifier.flags.q.in = true;
1025    temp_type_qualifier.flags.q.out = true;
1026    temp_type_qualifier.flags.q.buffer = true;
1027    temp_type_qualifier.flags.q.patch = true;
1028    interface_type_mask = temp_type_qualifier.flags.i;
1029
1030    /* Get the block's interface qualifier.  The interface_qualifier
1031     * production rule guarantees that only one bit will be set (and
1032     * it will be in/out/uniform).
1033     */
1034    ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1035
1036    block->default_layout.flags.i |= block_interface_qualifier;
1037
1038    if (state->stage == MESA_SHADER_GEOMETRY &&
1039        state->has_explicit_attrib_stream() &&
1040        block->default_layout.flags.q.out) {
1041       /* Assign global layout's stream value. */
1042       block->default_layout.flags.q.stream = 1;
1043       block->default_layout.flags.q.explicit_stream = 0;
1044       block->default_layout.stream = state->out_qualifier->stream;
1045    }
1046
1047    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1048       /* Assign global layout's xfb_buffer value. */
1049       block->default_layout.flags.q.xfb_buffer = 1;
1050       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1051       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1052    }
1053
1054    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1055       ast_type_qualifier& qualifier = member->type->qualifier;
1056       if ((qualifier.flags.i & interface_type_mask) == 0) {
1057          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1058           * "If no optional qualifier is used in a member declaration, the
1059           *  qualifier of the variable is just in, out, or uniform as declared
1060           *  by interface-qualifier."
1061           */
1062          qualifier.flags.i |= block_interface_qualifier;
1063       } else if ((qualifier.flags.i & interface_type_mask) !=
1064                  block_interface_qualifier) {
1065          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1066           * "If optional qualifiers are used, they can include interpolation
1067           *  and storage qualifiers and they must declare an input, output,
1068           *  or uniform variable consistent with the interface qualifier of
1069           *  the block."
1070           */
1071          _mesa_glsl_error(locp, state,
1072                           "uniform/in/out qualifier on "
1073                           "interface block member does not match "
1074                           "the interface block");
1075       }
1076
1077       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1078          _mesa_glsl_error(locp, state,
1079                           "invariant qualifiers can be used only "
1080                           "in interface block members for shader "
1081                           "inputs or outputs");
1082    }
1083 }
1084
1085 static void
1086 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1087 {
1088    if (q->is_subroutine_decl())
1089       printf("subroutine ");
1090
1091    if (q->subroutine_list) {
1092       printf("subroutine (");
1093       q->subroutine_list->print();
1094       printf(")");
1095    }
1096
1097    if (q->flags.q.constant)
1098       printf("const ");
1099
1100    if (q->flags.q.invariant)
1101       printf("invariant ");
1102
1103    if (q->flags.q.attribute)
1104       printf("attribute ");
1105
1106    if (q->flags.q.varying)
1107       printf("varying ");
1108
1109    if (q->flags.q.in && q->flags.q.out)
1110       printf("inout ");
1111    else {
1112       if (q->flags.q.in)
1113          printf("in ");
1114
1115       if (q->flags.q.out)
1116          printf("out ");
1117    }
1118
1119    if (q->flags.q.centroid)
1120       printf("centroid ");
1121    if (q->flags.q.sample)
1122       printf("sample ");
1123    if (q->flags.q.patch)
1124       printf("patch ");
1125    if (q->flags.q.uniform)
1126       printf("uniform ");
1127    if (q->flags.q.buffer)
1128       printf("buffer ");
1129    if (q->flags.q.smooth)
1130       printf("smooth ");
1131    if (q->flags.q.flat)
1132       printf("flat ");
1133    if (q->flags.q.noperspective)
1134       printf("noperspective ");
1135 }
1136
1137
1138 void
1139 ast_node::print(void) const
1140 {
1141    printf("unhandled node ");
1142 }
1143
1144
1145 ast_node::ast_node(void)
1146 {
1147    this->location.source = 0;
1148    this->location.first_line = 0;
1149    this->location.first_column = 0;
1150    this->location.last_line = 0;
1151    this->location.last_column = 0;
1152 }
1153
1154
1155 static void
1156 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1157 {
1158    if (array_specifier)
1159       array_specifier->print();
1160 }
1161
1162
1163 void
1164 ast_compound_statement::print(void) const
1165 {
1166    printf("{\n");
1167
1168    foreach_list_typed(ast_node, ast, link, &this->statements) {
1169       ast->print();
1170    }
1171
1172    printf("}\n");
1173 }
1174
1175
1176 ast_compound_statement::ast_compound_statement(int new_scope,
1177                                                ast_node *statements)
1178 {
1179    this->new_scope = new_scope;
1180
1181    if (statements != NULL) {
1182       this->statements.push_degenerate_list_at_head(&statements->link);
1183    }
1184 }
1185
1186
1187 void
1188 ast_expression::print(void) const
1189 {
1190    switch (oper) {
1191    case ast_assign:
1192    case ast_mul_assign:
1193    case ast_div_assign:
1194    case ast_mod_assign:
1195    case ast_add_assign:
1196    case ast_sub_assign:
1197    case ast_ls_assign:
1198    case ast_rs_assign:
1199    case ast_and_assign:
1200    case ast_xor_assign:
1201    case ast_or_assign:
1202       subexpressions[0]->print();
1203       printf("%s ", operator_string(oper));
1204       subexpressions[1]->print();
1205       break;
1206
1207    case ast_field_selection:
1208       subexpressions[0]->print();
1209       printf(". %s ", primary_expression.identifier);
1210       break;
1211
1212    case ast_plus:
1213    case ast_neg:
1214    case ast_bit_not:
1215    case ast_logic_not:
1216    case ast_pre_inc:
1217    case ast_pre_dec:
1218       printf("%s ", operator_string(oper));
1219       subexpressions[0]->print();
1220       break;
1221
1222    case ast_post_inc:
1223    case ast_post_dec:
1224       subexpressions[0]->print();
1225       printf("%s ", operator_string(oper));
1226       break;
1227
1228    case ast_conditional:
1229       subexpressions[0]->print();
1230       printf("? ");
1231       subexpressions[1]->print();
1232       printf(": ");
1233       subexpressions[2]->print();
1234       break;
1235
1236    case ast_array_index:
1237       subexpressions[0]->print();
1238       printf("[ ");
1239       subexpressions[1]->print();
1240       printf("] ");
1241       break;
1242
1243    case ast_function_call: {
1244       subexpressions[0]->print();
1245       printf("( ");
1246
1247       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1248          if (&ast->link != this->expressions.get_head())
1249             printf(", ");
1250
1251          ast->print();
1252       }
1253
1254       printf(") ");
1255       break;
1256    }
1257
1258    case ast_identifier:
1259       printf("%s ", primary_expression.identifier);
1260       break;
1261
1262    case ast_int_constant:
1263       printf("%d ", primary_expression.int_constant);
1264       break;
1265
1266    case ast_uint_constant:
1267       printf("%u ", primary_expression.uint_constant);
1268       break;
1269
1270    case ast_float_constant:
1271       printf("%f ", primary_expression.float_constant);
1272       break;
1273
1274    case ast_double_constant:
1275       printf("%f ", primary_expression.double_constant);
1276       break;
1277
1278    case ast_int64_constant:
1279       printf("%" PRId64 " ", primary_expression.int64_constant);
1280       break;
1281
1282    case ast_uint64_constant:
1283       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1284       break;
1285
1286    case ast_bool_constant:
1287       printf("%s ",
1288              primary_expression.bool_constant
1289              ? "true" : "false");
1290       break;
1291
1292    case ast_sequence: {
1293       printf("( ");
1294       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1295          if (&ast->link != this->expressions.get_head())
1296             printf(", ");
1297
1298          ast->print();
1299       }
1300       printf(") ");
1301       break;
1302    }
1303
1304    case ast_aggregate: {
1305       printf("{ ");
1306       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1307          if (&ast->link != this->expressions.get_head())
1308             printf(", ");
1309
1310          ast->print();
1311       }
1312       printf("} ");
1313       break;
1314    }
1315
1316    default:
1317       assert(0);
1318       break;
1319    }
1320 }
1321
1322 ast_expression::ast_expression(int oper,
1323                                ast_expression *ex0,
1324                                ast_expression *ex1,
1325                                ast_expression *ex2) :
1326    primary_expression()
1327 {
1328    this->oper = ast_operators(oper);
1329    this->subexpressions[0] = ex0;
1330    this->subexpressions[1] = ex1;
1331    this->subexpressions[2] = ex2;
1332    this->non_lvalue_description = NULL;
1333    this->is_lhs = false;
1334 }
1335
1336
1337 void
1338 ast_expression_statement::print(void) const
1339 {
1340    if (expression)
1341       expression->print();
1342
1343    printf("; ");
1344 }
1345
1346
1347 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1348    expression(ex)
1349 {
1350    /* empty */
1351 }
1352
1353
1354 void
1355 ast_function::print(void) const
1356 {
1357    return_type->print();
1358    printf(" %s (", identifier);
1359
1360    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1361       ast->print();
1362    }
1363
1364    printf(")");
1365 }
1366
1367
1368 ast_function::ast_function(void)
1369    : return_type(NULL), identifier(NULL), is_definition(false),
1370      signature(NULL)
1371 {
1372    /* empty */
1373 }
1374
1375
1376 void
1377 ast_fully_specified_type::print(void) const
1378 {
1379    _mesa_ast_type_qualifier_print(& qualifier);
1380    specifier->print();
1381 }
1382
1383
1384 void
1385 ast_parameter_declarator::print(void) const
1386 {
1387    type->print();
1388    if (identifier)
1389       printf("%s ", identifier);
1390    ast_opt_array_dimensions_print(array_specifier);
1391 }
1392
1393
1394 void
1395 ast_function_definition::print(void) const
1396 {
1397    prototype->print();
1398    body->print();
1399 }
1400
1401
1402 void
1403 ast_declaration::print(void) const
1404 {
1405    printf("%s ", identifier);
1406    ast_opt_array_dimensions_print(array_specifier);
1407
1408    if (initializer) {
1409       printf("= ");
1410       initializer->print();
1411    }
1412 }
1413
1414
1415 ast_declaration::ast_declaration(const char *identifier,
1416                                  ast_array_specifier *array_specifier,
1417                                  ast_expression *initializer)
1418 {
1419    this->identifier = identifier;
1420    this->array_specifier = array_specifier;
1421    this->initializer = initializer;
1422 }
1423
1424
1425 void
1426 ast_declarator_list::print(void) const
1427 {
1428    assert(type || invariant);
1429
1430    if (type)
1431       type->print();
1432    else if (invariant)
1433       printf("invariant ");
1434    else
1435       printf("precise ");
1436
1437    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1438       if (&ast->link != this->declarations.get_head())
1439          printf(", ");
1440
1441       ast->print();
1442    }
1443
1444    printf("; ");
1445 }
1446
1447
1448 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1449 {
1450    this->type = type;
1451    this->invariant = false;
1452    this->precise = false;
1453 }
1454
1455 void
1456 ast_jump_statement::print(void) const
1457 {
1458    switch (mode) {
1459    case ast_continue:
1460       printf("continue; ");
1461       break;
1462    case ast_break:
1463       printf("break; ");
1464       break;
1465    case ast_return:
1466       printf("return ");
1467       if (opt_return_value)
1468          opt_return_value->print();
1469
1470       printf("; ");
1471       break;
1472    case ast_discard:
1473       printf("discard; ");
1474       break;
1475    }
1476 }
1477
1478
1479 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1480    : opt_return_value(NULL)
1481 {
1482    this->mode = ast_jump_modes(mode);
1483
1484    if (mode == ast_return)
1485       opt_return_value = return_value;
1486 }
1487
1488
1489 void
1490 ast_selection_statement::print(void) const
1491 {
1492    printf("if ( ");
1493    condition->print();
1494    printf(") ");
1495
1496    then_statement->print();
1497
1498    if (else_statement) {
1499       printf("else ");
1500       else_statement->print();
1501    }
1502 }
1503
1504
1505 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1506                                                  ast_node *then_statement,
1507                                                  ast_node *else_statement)
1508 {
1509    this->condition = condition;
1510    this->then_statement = then_statement;
1511    this->else_statement = else_statement;
1512 }
1513
1514
1515 void
1516 ast_switch_statement::print(void) const
1517 {
1518    printf("switch ( ");
1519    test_expression->print();
1520    printf(") ");
1521
1522    body->print();
1523 }
1524
1525
1526 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1527                                            ast_node *body)
1528 {
1529    this->test_expression = test_expression;
1530    this->body = body;
1531 }
1532
1533
1534 void
1535 ast_switch_body::print(void) const
1536 {
1537    printf("{\n");
1538    if (stmts != NULL) {
1539       stmts->print();
1540    }
1541    printf("}\n");
1542 }
1543
1544
1545 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1546 {
1547    this->stmts = stmts;
1548 }
1549
1550
1551 void ast_case_label::print(void) const
1552 {
1553    if (test_value != NULL) {
1554       printf("case ");
1555       test_value->print();
1556       printf(": ");
1557    } else {
1558       printf("default: ");
1559    }
1560 }
1561
1562
1563 ast_case_label::ast_case_label(ast_expression *test_value)
1564 {
1565    this->test_value = test_value;
1566 }
1567
1568
1569 void ast_case_label_list::print(void) const
1570 {
1571    foreach_list_typed(ast_node, ast, link, & this->labels) {
1572       ast->print();
1573    }
1574    printf("\n");
1575 }
1576
1577
1578 ast_case_label_list::ast_case_label_list(void)
1579 {
1580 }
1581
1582
1583 void ast_case_statement::print(void) const
1584 {
1585    labels->print();
1586    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1587       ast->print();
1588       printf("\n");
1589    }
1590 }
1591
1592
1593 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1594 {
1595    this->labels = labels;
1596 }
1597
1598
1599 void ast_case_statement_list::print(void) const
1600 {
1601    foreach_list_typed(ast_node, ast, link, & this->cases) {
1602       ast->print();
1603    }
1604 }
1605
1606
1607 ast_case_statement_list::ast_case_statement_list(void)
1608 {
1609 }
1610
1611
1612 void
1613 ast_iteration_statement::print(void) const
1614 {
1615    switch (mode) {
1616    case ast_for:
1617       printf("for( ");
1618       if (init_statement)
1619          init_statement->print();
1620       printf("; ");
1621
1622       if (condition)
1623          condition->print();
1624       printf("; ");
1625
1626       if (rest_expression)
1627          rest_expression->print();
1628       printf(") ");
1629
1630       body->print();
1631       break;
1632
1633    case ast_while:
1634       printf("while ( ");
1635       if (condition)
1636          condition->print();
1637       printf(") ");
1638       body->print();
1639       break;
1640
1641    case ast_do_while:
1642       printf("do ");
1643       body->print();
1644       printf("while ( ");
1645       if (condition)
1646          condition->print();
1647       printf("); ");
1648       break;
1649    }
1650 }
1651
1652
1653 ast_iteration_statement::ast_iteration_statement(int mode,
1654                                                  ast_node *init,
1655                                                  ast_node *condition,
1656                                                  ast_expression *rest_expression,
1657                                                  ast_node *body)
1658 {
1659    this->mode = ast_iteration_modes(mode);
1660    this->init_statement = init;
1661    this->condition = condition;
1662    this->rest_expression = rest_expression;
1663    this->body = body;
1664 }
1665
1666
1667 void
1668 ast_struct_specifier::print(void) const
1669 {
1670    printf("struct %s { ", name);
1671    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1672       ast->print();
1673    }
1674    printf("} ");
1675 }
1676
1677
1678 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1679                                            ast_declarator_list *declarator_list)
1680    : name(identifier), layout(NULL), declarations(), is_declaration(true),
1681      type(NULL)
1682 {
1683    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1684 }
1685
1686 void ast_subroutine_list::print(void) const
1687 {
1688    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1689       if (&ast->link != this->declarations.get_head())
1690          printf(", ");
1691       ast->print();
1692    }
1693 }
1694
1695 static void
1696 set_shader_inout_layout(struct gl_shader *shader,
1697                      struct _mesa_glsl_parse_state *state)
1698 {
1699    /* Should have been prevented by the parser. */
1700    if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1701        shader->Stage == MESA_SHADER_VERTEX) {
1702       assert(!state->in_qualifier->flags.i);
1703    } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1704               shader->Stage != MESA_SHADER_TESS_EVAL) {
1705       assert(!state->in_qualifier->flags.i);
1706    }
1707
1708    if (shader->Stage != MESA_SHADER_COMPUTE) {
1709       /* Should have been prevented by the parser. */
1710       assert(!state->cs_input_local_size_specified);
1711       assert(!state->cs_input_local_size_variable_specified);
1712    }
1713
1714    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1715       /* Should have been prevented by the parser. */
1716       assert(!state->fs_uses_gl_fragcoord);
1717       assert(!state->fs_redeclares_gl_fragcoord);
1718       assert(!state->fs_pixel_center_integer);
1719       assert(!state->fs_origin_upper_left);
1720       assert(!state->fs_early_fragment_tests);
1721       assert(!state->fs_inner_coverage);
1722       assert(!state->fs_post_depth_coverage);
1723    }
1724
1725    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1726       if (state->out_qualifier->out_xfb_stride[i]) {
1727          unsigned xfb_stride;
1728          if (state->out_qualifier->out_xfb_stride[i]->
1729                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1730                 true)) {
1731             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1732          }
1733       }
1734    }
1735
1736    switch (shader->Stage) {
1737    case MESA_SHADER_TESS_CTRL:
1738       shader->info.TessCtrl.VerticesOut = 0;
1739       if (state->tcs_output_vertices_specified) {
1740          unsigned vertices;
1741          if (state->out_qualifier->vertices->
1742                process_qualifier_constant(state, "vertices", &vertices,
1743                                           false)) {
1744
1745             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1746             if (vertices > state->Const.MaxPatchVertices) {
1747                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1748                                 "GL_MAX_PATCH_VERTICES", vertices);
1749             }
1750             shader->info.TessCtrl.VerticesOut = vertices;
1751          }
1752       }
1753       break;
1754    case MESA_SHADER_TESS_EVAL:
1755       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1756       if (state->in_qualifier->flags.q.prim_type)
1757          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1758
1759       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1760       if (state->in_qualifier->flags.q.vertex_spacing)
1761          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1762
1763       shader->info.TessEval.VertexOrder = 0;
1764       if (state->in_qualifier->flags.q.ordering)
1765          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1766
1767       shader->info.TessEval.PointMode = -1;
1768       if (state->in_qualifier->flags.q.point_mode)
1769          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1770       break;
1771    case MESA_SHADER_GEOMETRY:
1772       shader->info.Geom.VerticesOut = -1;
1773       if (state->out_qualifier->flags.q.max_vertices) {
1774          unsigned qual_max_vertices;
1775          if (state->out_qualifier->max_vertices->
1776                process_qualifier_constant(state, "max_vertices",
1777                                           &qual_max_vertices, true)) {
1778
1779             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1780                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1781                _mesa_glsl_error(&loc, state,
1782                                 "maximum output vertices (%d) exceeds "
1783                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1784                                 qual_max_vertices);
1785             }
1786             shader->info.Geom.VerticesOut = qual_max_vertices;
1787          }
1788       }
1789
1790       if (state->gs_input_prim_type_specified) {
1791          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1792       } else {
1793          shader->info.Geom.InputType = PRIM_UNKNOWN;
1794       }
1795
1796       if (state->out_qualifier->flags.q.prim_type) {
1797          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1798       } else {
1799          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1800       }
1801
1802       shader->info.Geom.Invocations = 0;
1803       if (state->in_qualifier->flags.q.invocations) {
1804          unsigned invocations;
1805          if (state->in_qualifier->invocations->
1806                process_qualifier_constant(state, "invocations",
1807                                           &invocations, false)) {
1808
1809             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1810             if (invocations > MAX_GEOMETRY_SHADER_INVOCATIONS) {
1811                _mesa_glsl_error(&loc, state,
1812                                 "invocations (%d) exceeds "
1813                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1814                                 invocations);
1815             }
1816             shader->info.Geom.Invocations = invocations;
1817          }
1818       }
1819       break;
1820
1821    case MESA_SHADER_COMPUTE:
1822       if (state->cs_input_local_size_specified) {
1823          for (int i = 0; i < 3; i++)
1824             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1825       } else {
1826          for (int i = 0; i < 3; i++)
1827             shader->info.Comp.LocalSize[i] = 0;
1828       }
1829
1830       shader->info.Comp.LocalSizeVariable =
1831          state->cs_input_local_size_variable_specified;
1832       break;
1833
1834    case MESA_SHADER_FRAGMENT:
1835       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1836       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1837       shader->pixel_center_integer = state->fs_pixel_center_integer;
1838       shader->origin_upper_left = state->fs_origin_upper_left;
1839       shader->ARB_fragment_coord_conventions_enable =
1840          state->ARB_fragment_coord_conventions_enable;
1841       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1842       shader->InnerCoverage = state->fs_inner_coverage;
1843       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1844       shader->BlendSupport = state->fs_blend_support;
1845       break;
1846
1847    default:
1848       /* Nothing to do. */
1849       break;
1850    }
1851
1852    shader->bindless_sampler = state->bindless_sampler_specified;
1853    shader->bindless_image = state->bindless_image_specified;
1854    shader->bound_sampler = state->bound_sampler_specified;
1855    shader->bound_image = state->bound_image_specified;
1856 }
1857
1858 /* src can be NULL if only the symbols found in the exec_list should be
1859  * copied
1860  */
1861 void
1862 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1863                                    struct glsl_symbol_table *src,
1864                                    struct glsl_symbol_table *dest)
1865 {
1866    foreach_in_list (ir_instruction, ir, shader_ir) {
1867       switch (ir->ir_type) {
1868       case ir_type_function:
1869          dest->add_function((ir_function *) ir);
1870          break;
1871       case ir_type_variable: {
1872          ir_variable *const var = (ir_variable *) ir;
1873
1874          if (var->data.mode != ir_var_temporary)
1875             dest->add_variable(var);
1876          break;
1877       }
1878       default:
1879          break;
1880       }
1881    }
1882
1883    if (src != NULL) {
1884       /* Explicitly copy the gl_PerVertex interface definitions because these
1885        * are needed to check they are the same during the interstage link.
1886        * They can’t necessarily be found via the exec_list because the members
1887        * might not be referenced. The GL spec still requires that they match
1888        * in that case.
1889        */
1890       const glsl_type *iface =
1891          src->get_interface("gl_PerVertex", ir_var_shader_in);
1892       if (iface)
1893          dest->add_interface(iface->name, iface, ir_var_shader_in);
1894
1895       iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1896       if (iface)
1897          dest->add_interface(iface->name, iface, ir_var_shader_out);
1898    }
1899 }
1900
1901 extern "C" {
1902
1903 static void
1904 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1905 {
1906    int j, k;
1907    int index = 0;
1908
1909    for (j = 0; j < state->num_subroutines; j++) {
1910       while (state->subroutines[j]->subroutine_index == -1) {
1911          for (k = 0; k < state->num_subroutines; k++) {
1912             if (state->subroutines[k]->subroutine_index == index)
1913                break;
1914             else if (k == state->num_subroutines - 1) {
1915                state->subroutines[j]->subroutine_index = index;
1916             }
1917          }
1918          index++;
1919       }
1920    }
1921 }
1922
1923 static void
1924 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1925                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1926                     struct glcpp_parser *data,
1927                     unsigned version,
1928                     bool es)
1929 {
1930    unsigned gl_version = state->ctx->Extensions.Version;
1931    gl_api api = state->ctx->API;
1932
1933    if (gl_version != 0xff) {
1934       unsigned i;
1935       for (i = 0; i < state->num_supported_versions; i++) {
1936          if (state->supported_versions[i].ver == version &&
1937              state->supported_versions[i].es == es) {
1938             gl_version = state->supported_versions[i].gl_ver;
1939             break;
1940          }
1941       }
1942
1943       if (i == state->num_supported_versions)
1944          return;
1945    }
1946
1947    if (es)
1948       api = API_OPENGLES2;
1949
1950    for (unsigned i = 0;
1951         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
1952       const _mesa_glsl_extension *extension
1953          = &_mesa_glsl_supported_extensions[i];
1954       if (extension->compatible_with_state(state, api, gl_version)) {
1955          add_builtin_define(data, extension->name, 1);
1956       }
1957    }
1958 }
1959
1960 /* Implements parsing checks that we can't do during parsing */
1961 static void
1962 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
1963 {
1964    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
1965       YYLTYPE loc;
1966       memset(&loc, 0, sizeof(loc));
1967       _mesa_glsl_error(&loc, state, "Compute shaders require "
1968                        "GLSL 4.30 or GLSL ES 3.10");
1969    }
1970 }
1971
1972 static void
1973 opt_shader_and_create_symbol_table(struct gl_context *ctx,
1974                                    struct glsl_symbol_table *source_symbols,
1975                                    struct gl_shader *shader)
1976 {
1977    assert(shader->CompileStatus != COMPILE_FAILURE &&
1978           !shader->ir->is_empty());
1979
1980    struct gl_shader_compiler_options *options =
1981       &ctx->Const.ShaderCompilerOptions[shader->Stage];
1982
1983    /* Do some optimization at compile time to reduce shader IR size
1984     * and reduce later work if the same shader is linked multiple times
1985     */
1986    if (ctx->Const.GLSLOptimizeConservatively) {
1987       /* Run it just once. */
1988       do_common_optimization(shader->ir, false, false, options,
1989                              ctx->Const.NativeIntegers);
1990    } else {
1991       /* Repeat it until it stops making changes. */
1992       while (do_common_optimization(shader->ir, false, false, options,
1993                                     ctx->Const.NativeIntegers))
1994          ;
1995    }
1996
1997    validate_ir_tree(shader->ir);
1998
1999    enum ir_variable_mode other;
2000    switch (shader->Stage) {
2001    case MESA_SHADER_VERTEX:
2002       other = ir_var_shader_in;
2003       break;
2004    case MESA_SHADER_FRAGMENT:
2005       other = ir_var_shader_out;
2006       break;
2007    default:
2008       /* Something invalid to ensure optimize_dead_builtin_uniforms
2009        * doesn't remove anything other than uniforms or constants.
2010        */
2011       other = ir_var_mode_count;
2012       break;
2013    }
2014
2015    optimize_dead_builtin_variables(shader->ir, other);
2016
2017    validate_ir_tree(shader->ir);
2018
2019    /* Retain any live IR, but trash the rest. */
2020    reparent_ir(shader->ir, shader->ir);
2021
2022    /* Destroy the symbol table.  Create a new symbol table that contains only
2023     * the variables and functions that still exist in the IR.  The symbol
2024     * table will be used later during linking.
2025     *
2026     * There must NOT be any freed objects still referenced by the symbol
2027     * table.  That could cause the linker to dereference freed memory.
2028     *
2029     * We don't have to worry about types or interface-types here because those
2030     * are fly-weights that are looked up by glsl_type.
2031     */
2032    _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2033                                       shader->symbols);
2034 }
2035
2036 void
2037 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2038                           bool dump_ast, bool dump_hir, bool force_recompile)
2039 {
2040    const char *source = force_recompile && shader->FallbackSource ?
2041       shader->FallbackSource : shader->Source;
2042
2043    if (!force_recompile) {
2044       if (ctx->Cache) {
2045          char buf[41];
2046          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2047                                 shader->sha1);
2048          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2049             /* We've seen this shader before and know it compiles */
2050             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2051                _mesa_sha1_format(buf, shader->sha1);
2052                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2053             }
2054             shader->CompileStatus = COMPILE_SKIPPED;
2055
2056             free((void *)shader->FallbackSource);
2057             shader->FallbackSource = NULL;
2058             return;
2059          }
2060       }
2061    } else {
2062       /* We should only ever end up here if a re-compile has been forced by a
2063        * shader cache miss. In which case we can skip the compile if its
2064        * already be done by a previous fallback or the initial compile call.
2065        */
2066       if (shader->CompileStatus == COMPILE_SUCCESS)
2067          return;
2068
2069       if (shader->CompileStatus == COMPILED_NO_OPTS) {
2070          opt_shader_and_create_symbol_table(ctx,
2071                                             NULL, /* source_symbols */
2072                                             shader);
2073          shader->CompileStatus = COMPILE_SUCCESS;
2074          return;
2075       }
2076    }
2077
2078    struct _mesa_glsl_parse_state *state =
2079       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2080
2081    if (ctx->Const.GenerateTemporaryNames)
2082       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2083                               false, true);
2084
2085    state->error = glcpp_preprocess(state, &source, &state->info_log,
2086                                    add_builtin_defines, state, ctx);
2087
2088    if (!state->error) {
2089      _mesa_glsl_lexer_ctor(state, source);
2090      _mesa_glsl_parse(state);
2091      _mesa_glsl_lexer_dtor(state);
2092      do_late_parsing_checks(state);
2093    }
2094
2095    if (dump_ast) {
2096       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2097          ast->print();
2098       }
2099       printf("\n\n");
2100    }
2101
2102    ralloc_free(shader->ir);
2103    shader->ir = new(shader) exec_list;
2104    if (!state->error && !state->translation_unit.is_empty())
2105       _mesa_ast_to_hir(shader->ir, state);
2106
2107    if (!state->error) {
2108       validate_ir_tree(shader->ir);
2109
2110       /* Print out the unoptimized IR. */
2111       if (dump_hir) {
2112          _mesa_print_ir(stdout, shader->ir, state);
2113       }
2114    }
2115
2116    if (shader->InfoLog)
2117       ralloc_free(shader->InfoLog);
2118
2119    if (!state->error)
2120       set_shader_inout_layout(shader, state);
2121
2122    shader->symbols = new(shader->ir) glsl_symbol_table;
2123    shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2124    shader->InfoLog = state->info_log;
2125    shader->Version = state->language_version;
2126    shader->IsES = state->es_shader;
2127
2128    if (!state->error && !shader->ir->is_empty()) {
2129       assign_subroutine_indexes(state);
2130       lower_subroutine(shader->ir, state);
2131
2132       if (!ctx->Cache || force_recompile)
2133          opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2134       else {
2135          reparent_ir(shader->ir, shader->ir);
2136          shader->CompileStatus = COMPILED_NO_OPTS;
2137       }
2138    }
2139
2140    if (!force_recompile) {
2141       free((void *)shader->FallbackSource);
2142       shader->FallbackSource = NULL;
2143    }
2144
2145    delete state->symbols;
2146    ralloc_free(state);
2147 }
2148
2149 } /* extern "C" */
2150 /**
2151  * Do the set of common optimizations passes
2152  *
2153  * \param ir                          List of instructions to be optimized
2154  * \param linked                      Is the shader linked?  This enables
2155  *                                    optimizations passes that remove code at
2156  *                                    global scope and could cause linking to
2157  *                                    fail.
2158  * \param uniform_locations_assigned  Have locations already been assigned for
2159  *                                    uniforms?  This prevents the declarations
2160  *                                    of unused uniforms from being removed.
2161  *                                    The setting of this flag only matters if
2162  *                                    \c linked is \c true.
2163  * \param options                     The driver's preferred shader options.
2164  * \param native_integers             Selects optimizations that depend on the
2165  *                                    implementations supporting integers
2166  *                                    natively (as opposed to supporting
2167  *                                    integers in floating point registers).
2168  */
2169 bool
2170 do_common_optimization(exec_list *ir, bool linked,
2171                        bool uniform_locations_assigned,
2172                        const struct gl_shader_compiler_options *options,
2173                        bool native_integers)
2174 {
2175    const bool debug = false;
2176    GLboolean progress = GL_FALSE;
2177
2178 #define OPT(PASS, ...) do {                                             \
2179       if (debug) {                                                      \
2180          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2181          const bool opt_progress = PASS(__VA_ARGS__);                   \
2182          progress = opt_progress || progress;                           \
2183          if (opt_progress)                                              \
2184             _mesa_print_ir(stderr, ir, NULL);                           \
2185          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2186                  #PASS, opt_progress ? "made" : "no");                  \
2187       } else {                                                          \
2188          progress = PASS(__VA_ARGS__) || progress;                      \
2189       }                                                                 \
2190    } while (false)
2191
2192    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2193
2194    if (linked) {
2195       OPT(do_function_inlining, ir);
2196       OPT(do_dead_functions, ir);
2197       OPT(do_structure_splitting, ir);
2198    }
2199    propagate_invariance(ir);
2200    OPT(do_if_simplification, ir);
2201    OPT(opt_flatten_nested_if_blocks, ir);
2202    OPT(opt_conditional_discard, ir);
2203    OPT(do_copy_propagation, ir);
2204    OPT(do_copy_propagation_elements, ir);
2205
2206    if (options->OptimizeForAOS && !linked)
2207       OPT(opt_flip_matrices, ir);
2208
2209    if (linked && options->OptimizeForAOS) {
2210       OPT(do_vectorize, ir);
2211    }
2212
2213    if (linked)
2214       OPT(do_dead_code, ir, uniform_locations_assigned);
2215    else
2216       OPT(do_dead_code_unlinked, ir);
2217    OPT(do_dead_code_local, ir);
2218    OPT(do_tree_grafting, ir);
2219    OPT(do_constant_propagation, ir);
2220    if (linked)
2221       OPT(do_constant_variable, ir);
2222    else
2223       OPT(do_constant_variable_unlinked, ir);
2224    OPT(do_constant_folding, ir);
2225    OPT(do_minmax_prune, ir);
2226    OPT(do_rebalance_tree, ir);
2227    OPT(do_algebraic, ir, native_integers, options);
2228    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2229        options->EmitNoCont, options->EmitNoLoops);
2230    OPT(do_vec_index_to_swizzle, ir);
2231    OPT(lower_vector_insert, ir, false);
2232    OPT(optimize_swizzles, ir);
2233
2234    OPT(optimize_split_arrays, ir, linked);
2235    OPT(optimize_redundant_jumps, ir);
2236
2237    if (options->MaxUnrollIterations) {
2238       loop_state *ls = analyze_loop_variables(ir);
2239       if (ls->loop_found) {
2240          bool loop_progress = unroll_loops(ir, ls, options);
2241          while (loop_progress) {
2242             loop_progress = false;
2243             loop_progress |= do_constant_propagation(ir);
2244             loop_progress |= do_if_simplification(ir);
2245
2246             /* Some drivers only call do_common_optimization() once rather
2247              * than in a loop. So we must call do_lower_jumps() after
2248              * unrolling a loop because for drivers that use LLVM validation
2249              * will fail if a jump is not the last instruction in the block.
2250              * For example the following will fail LLVM validation:
2251              *
2252              *   (loop (
2253              *      ...
2254              *   break
2255              *   (assign  (x) (var_ref v124)  (expression int + (var_ref v124)
2256              *      (constant int (1)) ) )
2257              *   ))
2258              */
2259             loop_progress |= do_lower_jumps(ir, true, true,
2260                                             options->EmitNoMainReturn,
2261                                             options->EmitNoCont,
2262                                             options->EmitNoLoops);
2263          }
2264          progress |= loop_progress;
2265       }
2266       delete ls;
2267    }
2268
2269 #undef OPT
2270
2271    return progress;
2272 }
2273
2274 extern "C" {
2275
2276 /**
2277  * To be called at GL teardown time, this frees compiler datastructures.
2278  *
2279  * After calling this, any previously compiled shaders and shader
2280  * programs would be invalid.  So this should happen at approximately
2281  * program exit.
2282  */
2283 void
2284 _mesa_destroy_shader_compiler(void)
2285 {
2286    _mesa_destroy_shader_compiler_caches();
2287
2288    _mesa_glsl_release_types();
2289 }
2290
2291 /**
2292  * Releases compiler caches to trade off performance for memory.
2293  *
2294  * Intended to be used with glReleaseShaderCompiler().
2295  */
2296 void
2297 _mesa_destroy_shader_compiler_caches(void)
2298 {
2299    _mesa_glsl_release_builtin_functions();
2300 }
2301
2302 }