src/compiler/glsl/glsl_parser_extras.cpp

   1 /*
   2  * Copyright © 2008, 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23 #include <inttypes.h> /* for PRIx64 macro */
  24 #include <stdio.h>
  25 #include <stdarg.h>
  26 #include <string.h>
  27 #include <assert.h>
  28
  29 #include "main/context.h"
  30 #include "main/debug_output.h"
  31 #include "main/formats.h"
  32 #include "main/shaderobj.h"
  33 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
  34 #include "util/ralloc.h"
  35 #include "util/disk_cache.h"
  36 #include "util/mesa-sha1.h"
  37 #include "ast.h"
  38 #include "glsl_parser_extras.h"
  39 #include "glsl_parser.h"
  40 #include "ir_optimization.h"
  41 #include "loop_analysis.h"
  42 #include "builtin_functions.h"
  43
  44 /**
  45  * Format a short human-readable description of the given GLSL version.
  46  */
  47 const char *
  48 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
  49 {
  50    return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
  51                           version / 100, version % 100);
  52 }
  53
  54
  55 static const unsigned known_desktop_glsl_versions[] =
  56    { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450, 460 };
  57 static const unsigned known_desktop_gl_versions[] =
  58    {  20,  21,  30,  31,  32,  33,  40,  41,  42,  43,  44,  45, 46 };
  59
  60
  61 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
  62                                                gl_shader_stage stage,
  63                                                void *mem_ctx)
  64    : ctx(_ctx), cs_input_local_size_specified(false), cs_input_local_size(),
  65      switch_state(), warnings_enabled(true)
  66 {
  67    assert(stage < MESA_SHADER_STAGES);
  68    this->stage = stage;
  69
  70    this->scanner = NULL;
  71    this->translation_unit.make_empty();
  72    this->symbols = new(mem_ctx) glsl_symbol_table;
  73
  74    this->linalloc = linear_alloc_parent(this, 0);
  75
  76    this->info_log = ralloc_strdup(mem_ctx, "");
  77    this->error = false;
  78    this->loop_nesting_ast = NULL;
  79
  80    this->uses_builtin_functions = false;
  81
  82    /* Set default language version and extensions */
  83    this->language_version = 110;
  84    this->forced_language_version = ctx->Const.ForceGLSLVersion;
  85    this->zero_init = ctx->Const.GLSLZeroInit;
  86    this->gl_version = 20;
  87    this->compat_shader = true;
  88    this->es_shader = false;
  89    this->ARB_texture_rectangle_enable = true;
  90
  91    /* OpenGL ES 2.0 has different defaults from desktop GL. */
  92    if (ctx->API == API_OPENGLES2) {
  93       this->language_version = 100;
  94       this->es_shader = true;
  95       this->ARB_texture_rectangle_enable = false;
  96    }
  97
  98    this->extensions = &ctx->Extensions;
  99
 100    this->Const.MaxLights = ctx->Const.MaxLights;
 101    this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
 102    this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
 103    this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
 104    this->Const.MaxVertexAttribs = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs;
 105    this->Const.MaxVertexUniformComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxUniformComponents;
 106    this->Const.MaxVertexTextureImageUnits = ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits;
 107    this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
 108    this->Const.MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
 109    this->Const.MaxFragmentUniformComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxUniformComponents;
 110    this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset;
 111    this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset;
 112
 113    this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
 114
 115    this->Const.MaxDualSourceDrawBuffers = ctx->Const.MaxDualSourceDrawBuffers;
 116
 117    /* 1.50 constants */
 118    this->Const.MaxVertexOutputComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents;
 119    this->Const.MaxGeometryInputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxInputComponents;
 120    this->Const.MaxGeometryOutputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxOutputComponents;
 121    this->Const.MaxGeometryShaderInvocations = ctx->Const.MaxGeometryShaderInvocations;
 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_pixel_interlock_ordered = false;
 304    this->fs_pixel_interlock_unordered = false;
 305    this->fs_sample_interlock_ordered = false;
 306    this->fs_sample_interlock_unordered = false;
 307    this->fs_blend_support = 0;
 308    memset(this->atomic_counter_offsets, 0,
 309           sizeof(this->atomic_counter_offsets));
 310    this->allow_extension_directive_midshader =
 311       ctx->Const.AllowGLSLExtensionDirectiveMidShader;
 312    this->allow_builtin_variable_redeclaration =
 313       ctx->Const.AllowGLSLBuiltinVariableRedeclaration;
 314    this->allow_layout_qualifier_on_function_parameter =
 315       ctx->Const.AllowLayoutQualifiersOnFunctionParameters;
 316
 317    this->cs_input_local_size_variable_specified = false;
 318
 319    /* ARB_bindless_texture */
 320    this->bindless_sampler_specified = false;
 321    this->bindless_image_specified = false;
 322    this->bound_sampler_specified = false;
 323    this->bound_image_specified = false;
 324 }
 325
 326 /**
 327  * Determine whether the current GLSL version is sufficiently high to support
 328  * a certain feature, and generate an error message if it isn't.
 329  *
 330  * \param required_glsl_version and \c required_glsl_es_version are
 331  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 332  *
 333  * \param locp is the parser location where the error should be reported.
 334  *
 335  * \param fmt (and additional arguments) constitute a printf-style error
 336  * message to report if the version check fails.  Information about the
 337  * current and required GLSL versions will be appended.  So, for example, if
 338  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 339  * "foo unsupported") is called, the error message will be "foo unsupported in
 340  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 341  */
 342 bool
 343 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 344                                       unsigned required_glsl_es_version,
 345                                       YYLTYPE *locp, const char *fmt, ...)
 346 {
 347    if (this->is_version(required_glsl_version, required_glsl_es_version))
 348       return true;
 349
 350    va_list args;
 351    va_start(args, fmt);
 352    char *problem = ralloc_vasprintf(this, fmt, args);
 353    va_end(args);
 354    const char *glsl_version_string
 355       = glsl_compute_version_string(this, false, required_glsl_version);
 356    const char *glsl_es_version_string
 357       = glsl_compute_version_string(this, true, required_glsl_es_version);
 358    const char *requirement_string = "";
 359    if (required_glsl_version && required_glsl_es_version) {
 360       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 361                                            glsl_version_string,
 362                                            glsl_es_version_string);
 363    } else if (required_glsl_version) {
 364       requirement_string = ralloc_asprintf(this, " (%s required)",
 365                                            glsl_version_string);
 366    } else if (required_glsl_es_version) {
 367       requirement_string = ralloc_asprintf(this, " (%s required)",
 368                                            glsl_es_version_string);
 369    }
 370    _mesa_glsl_error(locp, this, "%s in %s%s",
 371                     problem, this->get_version_string(),
 372                     requirement_string);
 373
 374    return false;
 375 }
 376
 377 /**
 378  * Process a GLSL #version directive.
 379  *
 380  * \param version is the integer that follows the #version token.
 381  *
 382  * \param ident is a string identifier that follows the integer, if any is
 383  * present.  Otherwise NULL.
 384  */
 385 void
 386 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 387                                                   const char *ident)
 388 {
 389    bool es_token_present = false;
 390    bool compat_token_present = false;
 391    if (ident) {
 392       if (strcmp(ident, "es") == 0) {
 393          es_token_present = true;
 394       } else if (version >= 150) {
 395          if (strcmp(ident, "core") == 0) {
 396             /* Accept the token.  There's no need to record that this is
 397              * a core profile shader since that's the only profile we support.
 398              */
 399          } else if (strcmp(ident, "compatibility") == 0) {
 400             compat_token_present = true;
 401
 402             if (this->ctx->API != API_OPENGL_COMPAT) {
 403                _mesa_glsl_error(locp, this,
 404                                 "the compatibility profile is not supported");
 405             }
 406          } else {
 407             _mesa_glsl_error(locp, this,
 408                              "\"%s\" is not a valid shading language profile; "
 409                              "if present, it must be \"core\"", ident);
 410          }
 411       } else {
 412          _mesa_glsl_error(locp, this,
 413                           "illegal text following version number");
 414       }
 415    }
 416
 417    this->es_shader = es_token_present;
 418    if (version == 100) {
 419       if (es_token_present) {
 420          _mesa_glsl_error(locp, this,
 421                           "GLSL 1.00 ES should be selected using "
 422                           "`#version 100'");
 423       } else {
 424          this->es_shader = true;
 425       }
 426    }
 427
 428    if (this->es_shader) {
 429       this->ARB_texture_rectangle_enable = false;
 430    }
 431
 432    if (this->forced_language_version)
 433       this->language_version = this->forced_language_version;
 434    else
 435       this->language_version = version;
 436
 437    this->compat_shader = compat_token_present ||
 438                          (this->ctx->API == API_OPENGL_COMPAT &&
 439                           this->language_version == 140) ||
 440                          (!this->es_shader && this->language_version < 140);
 441
 442    bool supported = false;
 443    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 444       if (this->supported_versions[i].ver == this->language_version
 445           && this->supported_versions[i].es == this->es_shader) {
 446          this->gl_version = this->supported_versions[i].gl_ver;
 447          supported = true;
 448          break;
 449       }
 450    }
 451
 452    if (!supported) {
 453       _mesa_glsl_error(locp, this, "%s is not supported. "
 454                        "Supported versions are: %s",
 455                        this->get_version_string(),
 456                        this->supported_version_string);
 457
 458       /* On exit, the language_version must be set to a valid value.
 459        * Later calls to _mesa_glsl_initialize_types will misbehave if
 460        * the version is invalid.
 461        */
 462       switch (this->ctx->API) {
 463       case API_OPENGL_COMPAT:
 464       case API_OPENGL_CORE:
 465          this->language_version = this->ctx->Const.GLSLVersion;
 466          break;
 467
 468       case API_OPENGLES:
 469          assert(!"Should not get here.");
 470          /* FALLTHROUGH */
 471
 472       case API_OPENGLES2:
 473          this->language_version = 100;
 474          break;
 475       }
 476    }
 477 }
 478
 479
 480 /* This helper function will append the given message to the shader's
 481    info log and report it via GL_ARB_debug_output. Per that extension,
 482    'type' is one of the enum values classifying the message, and
 483    'id' is the implementation-defined ID of the given message. */
 484 static void
 485 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 486                GLenum type, const char *fmt, va_list ap)
 487 {
 488    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 489    GLuint msg_id = 0;
 490
 491    assert(state->info_log != NULL);
 492
 493    /* Get the offset that the new message will be written to. */
 494    int msg_offset = strlen(state->info_log);
 495
 496    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 497                                             locp->source,
 498                                             locp->first_line,
 499                                             locp->first_column,
 500                                             error ? "error" : "warning");
 501    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 502
 503    const char *const msg = &state->info_log[msg_offset];
 504    struct gl_context *ctx = state->ctx;
 505
 506    /* Report the error via GL_ARB_debug_output. */
 507    _mesa_shader_debug(ctx, type, &msg_id, msg);
 508
 509    ralloc_strcat(&state->info_log, "\n");
 510 }
 511
 512 void
 513 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 514                  const char *fmt, ...)
 515 {
 516    va_list ap;
 517
 518    state->error = true;
 519
 520    va_start(ap, fmt);
 521    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 522    va_end(ap);
 523 }
 524
 525
 526 void
 527 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 528                    const char *fmt, ...)
 529 {
 530    if (state->warnings_enabled) {
 531       va_list ap;
 532
 533       va_start(ap, fmt);
 534       _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 535       va_end(ap);
 536    }
 537 }
 538
 539
 540 /**
 541  * Enum representing the possible behaviors that can be specified in
 542  * an #extension directive.
 543  */
 544 enum ext_behavior {
 545    extension_disable,
 546    extension_enable,
 547    extension_require,
 548    extension_warn
 549 };
 550
 551 /**
 552  * Element type for _mesa_glsl_supported_extensions
 553  */
 554 struct _mesa_glsl_extension {
 555    /**
 556     * Name of the extension when referred to in a GLSL extension
 557     * statement
 558     */
 559    const char *name;
 560
 561    /**
 562     * Whether this extension is a part of AEP
 563     */
 564    bool aep;
 565
 566    /**
 567     * Predicate that checks whether the relevant extension is available for
 568     * this context.
 569     */
 570    bool (*available_pred)(const struct gl_context *,
 571                           gl_api api, uint8_t version);
 572
 573    /**
 574     * Flag in the _mesa_glsl_parse_state struct that should be set
 575     * when this extension is enabled.
 576     *
 577     * See note in _mesa_glsl_extension::supported_flag about "pointer
 578     * to member" types.
 579     */
 580    bool _mesa_glsl_parse_state::* enable_flag;
 581
 582    /**
 583     * Flag in the _mesa_glsl_parse_state struct that should be set
 584     * when the shader requests "warn" behavior for this extension.
 585     *
 586     * See note in _mesa_glsl_extension::supported_flag about "pointer
 587     * to member" types.
 588     */
 589    bool _mesa_glsl_parse_state::* warn_flag;
 590
 591
 592    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 593                               gl_api api, uint8_t gl_version) const;
 594    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 595 };
 596
 597 /** Checks if the context supports a user-facing extension */
 598 #define EXT(name_str, driver_cap, ...) \
 599 static MAYBE_UNUSED bool \
 600 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 601 { \
 602    return ctx->Extensions.driver_cap && (version >= \
 603           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 604 }
 605 #include "main/extensions_table.h"
 606 #undef EXT
 607
 608 #define EXT(NAME)                                           \
 609    { "GL_" #NAME, false, has_##NAME,                        \
 610      &_mesa_glsl_parse_state::NAME##_enable,                \
 611      &_mesa_glsl_parse_state::NAME##_warn }
 612
 613 #define EXT_AEP(NAME)                                       \
 614    { "GL_" #NAME, true, has_##NAME,                         \
 615      &_mesa_glsl_parse_state::NAME##_enable,                \
 616      &_mesa_glsl_parse_state::NAME##_warn }
 617
 618 /**
 619  * Table of extensions that can be enabled/disabled within a shader,
 620  * and the conditions under which they are supported.
 621  */
 622 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 623    /* ARB extensions go here, sorted alphabetically.
 624     */
 625    EXT(ARB_ES3_1_compatibility),
 626    EXT(ARB_ES3_2_compatibility),
 627    EXT(ARB_arrays_of_arrays),
 628    EXT(ARB_bindless_texture),
 629    EXT(ARB_compatibility),
 630    EXT(ARB_compute_shader),
 631    EXT(ARB_compute_variable_group_size),
 632    EXT(ARB_conservative_depth),
 633    EXT(ARB_cull_distance),
 634    EXT(ARB_derivative_control),
 635    EXT(ARB_draw_buffers),
 636    EXT(ARB_draw_instanced),
 637    EXT(ARB_enhanced_layouts),
 638    EXT(ARB_explicit_attrib_location),
 639    EXT(ARB_explicit_uniform_location),
 640    EXT(ARB_fragment_coord_conventions),
 641    EXT(ARB_fragment_layer_viewport),
 642    EXT(ARB_fragment_shader_interlock),
 643    EXT(ARB_gpu_shader5),
 644    EXT(ARB_gpu_shader_fp64),
 645    EXT(ARB_gpu_shader_int64),
 646    EXT(ARB_post_depth_coverage),
 647    EXT(ARB_sample_shading),
 648    EXT(ARB_separate_shader_objects),
 649    EXT(ARB_shader_atomic_counter_ops),
 650    EXT(ARB_shader_atomic_counters),
 651    EXT(ARB_shader_ballot),
 652    EXT(ARB_shader_bit_encoding),
 653    EXT(ARB_shader_clock),
 654    EXT(ARB_shader_draw_parameters),
 655    EXT(ARB_shader_group_vote),
 656    EXT(ARB_shader_image_load_store),
 657    EXT(ARB_shader_image_size),
 658    EXT(ARB_shader_precision),
 659    EXT(ARB_shader_stencil_export),
 660    EXT(ARB_shader_storage_buffer_object),
 661    EXT(ARB_shader_subroutine),
 662    EXT(ARB_shader_texture_image_samples),
 663    EXT(ARB_shader_texture_lod),
 664    EXT(ARB_shader_viewport_layer_array),
 665    EXT(ARB_shading_language_420pack),
 666    EXT(ARB_shading_language_packing),
 667    EXT(ARB_tessellation_shader),
 668    EXT(ARB_texture_cube_map_array),
 669    EXT(ARB_texture_gather),
 670    EXT(ARB_texture_multisample),
 671    EXT(ARB_texture_query_levels),
 672    EXT(ARB_texture_query_lod),
 673    EXT(ARB_texture_rectangle),
 674    EXT(ARB_uniform_buffer_object),
 675    EXT(ARB_vertex_attrib_64bit),
 676    EXT(ARB_viewport_array),
 677
 678    /* KHR extensions go here, sorted alphabetically.
 679     */
 680    EXT_AEP(KHR_blend_equation_advanced),
 681
 682    /* OES extensions go here, sorted alphabetically.
 683     */
 684    EXT(OES_EGL_image_external),
 685    EXT(OES_EGL_image_external_essl3),
 686    EXT(OES_geometry_point_size),
 687    EXT(OES_geometry_shader),
 688    EXT(OES_gpu_shader5),
 689    EXT(OES_primitive_bounding_box),
 690    EXT_AEP(OES_sample_variables),
 691    EXT_AEP(OES_shader_image_atomic),
 692    EXT(OES_shader_io_blocks),
 693    EXT_AEP(OES_shader_multisample_interpolation),
 694    EXT(OES_standard_derivatives),
 695    EXT(OES_tessellation_point_size),
 696    EXT(OES_tessellation_shader),
 697    EXT(OES_texture_3D),
 698    EXT(OES_texture_buffer),
 699    EXT(OES_texture_cube_map_array),
 700    EXT_AEP(OES_texture_storage_multisample_2d_array),
 701    EXT(OES_viewport_array),
 702
 703    /* All other extensions go here, sorted alphabetically.
 704     */
 705    EXT(AMD_conservative_depth),
 706    EXT(AMD_gpu_shader_int64),
 707    EXT(AMD_shader_stencil_export),
 708    EXT(AMD_shader_trinary_minmax),
 709    EXT(AMD_texture_texture4),
 710    EXT(AMD_vertex_shader_layer),
 711    EXT(AMD_vertex_shader_viewport_index),
 712    EXT(ANDROID_extension_pack_es31a),
 713    EXT(EXT_blend_func_extended),
 714    EXT(EXT_frag_depth),
 715    EXT(EXT_draw_buffers),
 716    EXT(EXT_clip_cull_distance),
 717    EXT(EXT_geometry_point_size),
 718    EXT_AEP(EXT_geometry_shader),
 719    EXT_AEP(EXT_gpu_shader5),
 720    EXT_AEP(EXT_primitive_bounding_box),
 721    EXT(EXT_separate_shader_objects),
 722    EXT(EXT_shader_framebuffer_fetch),
 723    EXT(EXT_shader_framebuffer_fetch_non_coherent),
 724    EXT(EXT_shader_image_load_formatted),
 725    EXT(EXT_shader_implicit_conversions),
 726    EXT(EXT_shader_integer_mix),
 727    EXT_AEP(EXT_shader_io_blocks),
 728    EXT(EXT_shader_samples_identical),
 729    EXT(EXT_tessellation_point_size),
 730    EXT_AEP(EXT_tessellation_shader),
 731    EXT(EXT_texture_array),
 732    EXT_AEP(EXT_texture_buffer),
 733    EXT_AEP(EXT_texture_cube_map_array),
 734    EXT(EXT_texture_query_lod),
 735    EXT(INTEL_conservative_rasterization),
 736    EXT(INTEL_shader_atomic_float_minmax),
 737    EXT(MESA_shader_integer_functions),
 738    EXT(NV_compute_shader_derivatives),
 739    EXT(NV_fragment_shader_interlock),
 740    EXT(NV_image_formats),
 741    EXT(NV_shader_atomic_float),
 742 };
 743
 744 #undef EXT
 745
 746
 747 /**
 748  * Determine whether a given extension is compatible with the target,
 749  * API, and extension information in the current parser state.
 750  */
 751 bool _mesa_glsl_extension::compatible_with_state(
 752       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 753 {
 754    return this->available_pred(state->ctx, api, gl_version);
 755 }
 756
 757 /**
 758  * Set the appropriate flags in the parser state to establish the
 759  * given behavior for this extension.
 760  */
 761 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 762                                      ext_behavior behavior) const
 763 {
 764    /* Note: the ->* operator indexes into state by the
 765     * offsets this->enable_flag and this->warn_flag.  See
 766     * _mesa_glsl_extension::supported_flag for more info.
 767     */
 768    state->*(this->enable_flag) = (behavior != extension_disable);
 769    state->*(this->warn_flag)   = (behavior == extension_warn);
 770 }
 771
 772 /**
 773  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 774  * the name is not found, return NULL.
 775  */
 776 static const _mesa_glsl_extension *find_extension(const char *name)
 777 {
 778    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 779       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 780          return &_mesa_glsl_supported_extensions[i];
 781       }
 782    }
 783    return NULL;
 784 }
 785
 786 bool
 787 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 788                              const char *behavior_string, YYLTYPE *behavior_locp,
 789                              _mesa_glsl_parse_state *state)
 790 {
 791    uint8_t gl_version = state->ctx->Extensions.Version;
 792    gl_api api = state->ctx->API;
 793    ext_behavior behavior;
 794    if (strcmp(behavior_string, "warn") == 0) {
 795       behavior = extension_warn;
 796    } else if (strcmp(behavior_string, "require") == 0) {
 797       behavior = extension_require;
 798    } else if (strcmp(behavior_string, "enable") == 0) {
 799       behavior = extension_enable;
 800    } else if (strcmp(behavior_string, "disable") == 0) {
 801       behavior = extension_disable;
 802    } else {
 803       _mesa_glsl_error(behavior_locp, state,
 804                        "unknown extension behavior `%s'",
 805                        behavior_string);
 806       return false;
 807    }
 808
 809    /* If we're in a desktop context but with an ES shader, use an ES API enum
 810     * to verify extension availability.
 811     */
 812    if (state->es_shader && api != API_OPENGLES2)
 813       api = API_OPENGLES2;
 814    /* Use the language-version derived GL version to extension checks, unless
 815     * we're using meta, which sets the version to the max.
 816     */
 817    if (gl_version != 0xff)
 818       gl_version = state->gl_version;
 819
 820    if (strcmp(name, "all") == 0) {
 821       if ((behavior == extension_enable) || (behavior == extension_require)) {
 822          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 823                           (behavior == extension_enable)
 824                           ? "enable" : "require");
 825          return false;
 826       } else {
 827          for (unsigned i = 0;
 828               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 829             const _mesa_glsl_extension *extension
 830                = &_mesa_glsl_supported_extensions[i];
 831             if (extension->compatible_with_state(state, api, gl_version)) {
 832                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 833             }
 834          }
 835       }
 836    } else {
 837       const _mesa_glsl_extension *extension = find_extension(name);
 838       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 839          extension->set_flags(state, behavior);
 840          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 841             for (unsigned i = 0;
 842                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 843                const _mesa_glsl_extension *extension =
 844                   &_mesa_glsl_supported_extensions[i];
 845
 846                if (!extension->aep)
 847                   continue;
 848                /* AEP should not be enabled if all of the sub-extensions can't
 849                 * also be enabled. This is not the proper layer to do such
 850                 * error-checking though.
 851                 */
 852                assert(extension->compatible_with_state(state, api, gl_version));
 853                extension->set_flags(state, behavior);
 854             }
 855          }
 856       } else {
 857          static const char fmt[] = "extension `%s' unsupported in %s shader";
 858
 859          if (behavior == extension_require) {
 860             _mesa_glsl_error(name_locp, state, fmt,
 861                              name, _mesa_shader_stage_to_string(state->stage));
 862             return false;
 863          } else {
 864             _mesa_glsl_warning(name_locp, state, fmt,
 865                                name, _mesa_shader_stage_to_string(state->stage));
 866          }
 867       }
 868    }
 869
 870    return true;
 871 }
 872
 873
 874 /**
 875  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 876  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 877  * (process_array_constructor, et al) sufficient information to do type
 878  * checking.
 879  *
 880  * Operates on assignments involving an aggregate initializer. E.g.,
 881  *
 882  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 883  *
 884  * or more ridiculously,
 885  *
 886  * struct S {
 887  *     vec4 v[2];
 888  * };
 889  *
 890  * struct {
 891  *     S a[2], b;
 892  *     int c;
 893  * } aggregate = {
 894  *     {
 895  *         {
 896  *             {
 897  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 898  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 899  *             } // a[0].v
 900  *         }, // a[0]
 901  *         {
 902  *             {
 903  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 904  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 905  *             } // a[1].v
 906  *         } // a[1]
 907  *     }, // a
 908  *     {
 909  *         {
 910  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 911  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 912  *         } // b.v
 913  *     }, // b
 914  *     4 // c
 915  * };
 916  *
 917  * This pass is necessary because the right-hand side of <type> e = { ... }
 918  * doesn't contain sufficient information to determine if the types match.
 919  */
 920 void
 921 _mesa_ast_set_aggregate_type(const glsl_type *type,
 922                              ast_expression *expr)
 923 {
 924    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 925    ai->constructor_type = type;
 926
 927    /* If the aggregate is an array, recursively set its elements' types. */
 928    if (type->is_array()) {
 929       /* Each array element has the type type->fields.array.
 930        *
 931        * E.g., if <type> if struct S[2] we want to set each element's type to
 932        * struct S.
 933        */
 934       for (exec_node *expr_node = ai->expressions.get_head_raw();
 935            !expr_node->is_tail_sentinel();
 936            expr_node = expr_node->next) {
 937          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 938                                                link);
 939
 940          if (expr->oper == ast_aggregate)
 941             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 942       }
 943
 944    /* If the aggregate is a struct, recursively set its fields' types. */
 945    } else if (type->is_struct()) {
 946       exec_node *expr_node = ai->expressions.get_head_raw();
 947
 948       /* Iterate through the struct's fields. */
 949       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 950            i++, expr_node = expr_node->next) {
 951          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 952                                                link);
 953
 954          if (expr->oper == ast_aggregate) {
 955             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 956          }
 957       }
 958    /* If the aggregate is a matrix, set its columns' types. */
 959    } else if (type->is_matrix()) {
 960       for (exec_node *expr_node = ai->expressions.get_head_raw();
 961            !expr_node->is_tail_sentinel();
 962            expr_node = expr_node->next) {
 963          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 964                                                link);
 965
 966          if (expr->oper == ast_aggregate)
 967             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 968       }
 969    }
 970 }
 971
 972 void
 973 _mesa_ast_process_interface_block(YYLTYPE *locp,
 974                                   _mesa_glsl_parse_state *state,
 975                                   ast_interface_block *const block,
 976                                   const struct ast_type_qualifier &q)
 977 {
 978    if (q.flags.q.buffer) {
 979       if (!state->has_shader_storage_buffer_objects()) {
 980          _mesa_glsl_error(locp, state,
 981                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 982                           "required for defining shader storage blocks");
 983       } else if (state->ARB_shader_storage_buffer_object_warn) {
 984          _mesa_glsl_warning(locp, state,
 985                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 986                             "required for defining shader storage blocks");
 987       }
 988    } else if (q.flags.q.uniform) {
 989       if (!state->has_uniform_buffer_objects()) {
 990          _mesa_glsl_error(locp, state,
 991                           "#version 140 / GL_ARB_uniform_buffer_object "
 992                           "required for defining uniform blocks");
 993       } else if (state->ARB_uniform_buffer_object_warn) {
 994          _mesa_glsl_warning(locp, state,
 995                             "#version 140 / GL_ARB_uniform_buffer_object "
 996                             "required for defining uniform blocks");
 997       }
 998    } else {
 999       if (!state->has_shader_io_blocks()) {
1000          if (state->es_shader) {
1001             _mesa_glsl_error(locp, state,
1002                              "GL_OES_shader_io_blocks or #version 320 "
1003                              "required for using interface blocks");
1004          } else {
1005             _mesa_glsl_error(locp, state,
1006                              "#version 150 required for using "
1007                              "interface blocks");
1008          }
1009       }
1010    }
1011
1012    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
1013     * "It is illegal to have an input block in a vertex shader
1014     *  or an output block in a fragment shader"
1015     */
1016    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
1017       _mesa_glsl_error(locp, state,
1018                        "`in' interface block is not allowed for "
1019                        "a vertex shader");
1020    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1021       _mesa_glsl_error(locp, state,
1022                        "`out' interface block is not allowed for "
1023                        "a fragment shader");
1024    }
1025
1026    /* Since block arrays require names, and both features are added in
1027     * the same language versions, we don't have to explicitly
1028     * version-check both things.
1029     */
1030    if (block->instance_name != NULL) {
1031       state->check_version(150, 300, locp, "interface blocks with "
1032                            "an instance name are not allowed");
1033    }
1034
1035    ast_type_qualifier::bitset_t interface_type_mask;
1036    struct ast_type_qualifier temp_type_qualifier;
1037
1038    /* Get a bitmask containing only the in/out/uniform/buffer
1039     * flags, allowing us to ignore other irrelevant flags like
1040     * interpolation qualifiers.
1041     */
1042    temp_type_qualifier.flags.i = 0;
1043    temp_type_qualifier.flags.q.uniform = true;
1044    temp_type_qualifier.flags.q.in = true;
1045    temp_type_qualifier.flags.q.out = true;
1046    temp_type_qualifier.flags.q.buffer = true;
1047    temp_type_qualifier.flags.q.patch = true;
1048    interface_type_mask = temp_type_qualifier.flags.i;
1049
1050    /* Get the block's interface qualifier.  The interface_qualifier
1051     * production rule guarantees that only one bit will be set (and
1052     * it will be in/out/uniform).
1053     */
1054    ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1055
1056    block->default_layout.flags.i |= block_interface_qualifier;
1057
1058    if (state->stage == MESA_SHADER_GEOMETRY &&
1059        state->has_explicit_attrib_stream() &&
1060        block->default_layout.flags.q.out) {
1061       /* Assign global layout's stream value. */
1062       block->default_layout.flags.q.stream = 1;
1063       block->default_layout.flags.q.explicit_stream = 0;
1064       block->default_layout.stream = state->out_qualifier->stream;
1065    }
1066
1067    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1068       /* Assign global layout's xfb_buffer value. */
1069       block->default_layout.flags.q.xfb_buffer = 1;
1070       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1071       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1072    }
1073
1074    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1075       ast_type_qualifier& qualifier = member->type->qualifier;
1076       if ((qualifier.flags.i & interface_type_mask) == 0) {
1077          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1078           * "If no optional qualifier is used in a member declaration, the
1079           *  qualifier of the variable is just in, out, or uniform as declared
1080           *  by interface-qualifier."
1081           */
1082          qualifier.flags.i |= block_interface_qualifier;
1083       } else if ((qualifier.flags.i & interface_type_mask) !=
1084                  block_interface_qualifier) {
1085          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1086           * "If optional qualifiers are used, they can include interpolation
1087           *  and storage qualifiers and they must declare an input, output,
1088           *  or uniform variable consistent with the interface qualifier of
1089           *  the block."
1090           */
1091          _mesa_glsl_error(locp, state,
1092                           "uniform/in/out qualifier on "
1093                           "interface block member does not match "
1094                           "the interface block");
1095       }
1096
1097       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1098          _mesa_glsl_error(locp, state,
1099                           "invariant qualifiers can be used only "
1100                           "in interface block members for shader "
1101                           "inputs or outputs");
1102    }
1103 }
1104
1105 static void
1106 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1107 {
1108    if (q->is_subroutine_decl())
1109       printf("subroutine ");
1110
1111    if (q->subroutine_list) {
1112       printf("subroutine (");
1113       q->subroutine_list->print();
1114       printf(")");
1115    }
1116
1117    if (q->flags.q.constant)
1118       printf("const ");
1119
1120    if (q->flags.q.invariant)
1121       printf("invariant ");
1122
1123    if (q->flags.q.attribute)
1124       printf("attribute ");
1125
1126    if (q->flags.q.varying)
1127       printf("varying ");
1128
1129    if (q->flags.q.in && q->flags.q.out)
1130       printf("inout ");
1131    else {
1132       if (q->flags.q.in)
1133          printf("in ");
1134
1135       if (q->flags.q.out)
1136          printf("out ");
1137    }
1138
1139    if (q->flags.q.centroid)
1140       printf("centroid ");
1141    if (q->flags.q.sample)
1142       printf("sample ");
1143    if (q->flags.q.patch)
1144       printf("patch ");
1145    if (q->flags.q.uniform)
1146       printf("uniform ");
1147    if (q->flags.q.buffer)
1148       printf("buffer ");
1149    if (q->flags.q.smooth)
1150       printf("smooth ");
1151    if (q->flags.q.flat)
1152       printf("flat ");
1153    if (q->flags.q.noperspective)
1154       printf("noperspective ");
1155 }
1156
1157
1158 void
1159 ast_node::print(void) const
1160 {
1161    printf("unhandled node ");
1162 }
1163
1164
1165 ast_node::ast_node(void)
1166 {
1167    this->location.source = 0;
1168    this->location.first_line = 0;
1169    this->location.first_column = 0;
1170    this->location.last_line = 0;
1171    this->location.last_column = 0;
1172 }
1173
1174
1175 static void
1176 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1177 {
1178    if (array_specifier)
1179       array_specifier->print();
1180 }
1181
1182
1183 void
1184 ast_compound_statement::print(void) const
1185 {
1186    printf("{\n");
1187
1188    foreach_list_typed(ast_node, ast, link, &this->statements) {
1189       ast->print();
1190    }
1191
1192    printf("}\n");
1193 }
1194
1195
1196 ast_compound_statement::ast_compound_statement(int new_scope,
1197                                                ast_node *statements)
1198 {
1199    this->new_scope = new_scope;
1200
1201    if (statements != NULL) {
1202       this->statements.push_degenerate_list_at_head(&statements->link);
1203    }
1204 }
1205
1206
1207 void
1208 ast_expression::print(void) const
1209 {
1210    switch (oper) {
1211    case ast_assign:
1212    case ast_mul_assign:
1213    case ast_div_assign:
1214    case ast_mod_assign:
1215    case ast_add_assign:
1216    case ast_sub_assign:
1217    case ast_ls_assign:
1218    case ast_rs_assign:
1219    case ast_and_assign:
1220    case ast_xor_assign:
1221    case ast_or_assign:
1222       subexpressions[0]->print();
1223       printf("%s ", operator_string(oper));
1224       subexpressions[1]->print();
1225       break;
1226
1227    case ast_field_selection:
1228       subexpressions[0]->print();
1229       printf(". %s ", primary_expression.identifier);
1230       break;
1231
1232    case ast_plus:
1233    case ast_neg:
1234    case ast_bit_not:
1235    case ast_logic_not:
1236    case ast_pre_inc:
1237    case ast_pre_dec:
1238       printf("%s ", operator_string(oper));
1239       subexpressions[0]->print();
1240       break;
1241
1242    case ast_post_inc:
1243    case ast_post_dec:
1244       subexpressions[0]->print();
1245       printf("%s ", operator_string(oper));
1246       break;
1247
1248    case ast_conditional:
1249       subexpressions[0]->print();
1250       printf("? ");
1251       subexpressions[1]->print();
1252       printf(": ");
1253       subexpressions[2]->print();
1254       break;
1255
1256    case ast_array_index:
1257       subexpressions[0]->print();
1258       printf("[ ");
1259       subexpressions[1]->print();
1260       printf("] ");
1261       break;
1262
1263    case ast_function_call: {
1264       subexpressions[0]->print();
1265       printf("( ");
1266
1267       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1268          if (&ast->link != this->expressions.get_head())
1269             printf(", ");
1270
1271          ast->print();
1272       }
1273
1274       printf(") ");
1275       break;
1276    }
1277
1278    case ast_identifier:
1279       printf("%s ", primary_expression.identifier);
1280       break;
1281
1282    case ast_int_constant:
1283       printf("%d ", primary_expression.int_constant);
1284       break;
1285
1286    case ast_uint_constant:
1287       printf("%u ", primary_expression.uint_constant);
1288       break;
1289
1290    case ast_float_constant:
1291       printf("%f ", primary_expression.float_constant);
1292       break;
1293
1294    case ast_double_constant:
1295       printf("%f ", primary_expression.double_constant);
1296       break;
1297
1298    case ast_int64_constant:
1299       printf("%" PRId64 " ", primary_expression.int64_constant);
1300       break;
1301
1302    case ast_uint64_constant:
1303       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1304       break;
1305
1306    case ast_bool_constant:
1307       printf("%s ",
1308              primary_expression.bool_constant
1309              ? "true" : "false");
1310       break;
1311
1312    case ast_sequence: {
1313       printf("( ");
1314       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1315          if (&ast->link != this->expressions.get_head())
1316             printf(", ");
1317
1318          ast->print();
1319       }
1320       printf(") ");
1321       break;
1322    }
1323
1324    case ast_aggregate: {
1325       printf("{ ");
1326       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1327          if (&ast->link != this->expressions.get_head())
1328             printf(", ");
1329
1330          ast->print();
1331       }
1332       printf("} ");
1333       break;
1334    }
1335
1336    default:
1337       assert(0);
1338       break;
1339    }
1340 }
1341
1342 ast_expression::ast_expression(int oper,
1343                                ast_expression *ex0,
1344                                ast_expression *ex1,
1345                                ast_expression *ex2) :
1346    primary_expression()
1347 {
1348    this->oper = ast_operators(oper);
1349    this->subexpressions[0] = ex0;
1350    this->subexpressions[1] = ex1;
1351    this->subexpressions[2] = ex2;
1352    this->non_lvalue_description = NULL;
1353    this->is_lhs = false;
1354 }
1355
1356
1357 void
1358 ast_expression_statement::print(void) const
1359 {
1360    if (expression)
1361       expression->print();
1362
1363    printf("; ");
1364 }
1365
1366
1367 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1368    expression(ex)
1369 {
1370    /* empty */
1371 }
1372
1373
1374 void
1375 ast_function::print(void) const
1376 {
1377    return_type->print();
1378    printf(" %s (", identifier);
1379
1380    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1381       ast->print();
1382    }
1383
1384    printf(")");
1385 }
1386
1387
1388 ast_function::ast_function(void)
1389    : return_type(NULL), identifier(NULL), is_definition(false),
1390      signature(NULL)
1391 {
1392    /* empty */
1393 }
1394
1395
1396 void
1397 ast_fully_specified_type::print(void) const
1398 {
1399    _mesa_ast_type_qualifier_print(& qualifier);
1400    specifier->print();
1401 }
1402
1403
1404 void
1405 ast_parameter_declarator::print(void) const
1406 {
1407    type->print();
1408    if (identifier)
1409       printf("%s ", identifier);
1410    ast_opt_array_dimensions_print(array_specifier);
1411 }
1412
1413
1414 void
1415 ast_function_definition::print(void) const
1416 {
1417    prototype->print();
1418    body->print();
1419 }
1420
1421
1422 void
1423 ast_declaration::print(void) const
1424 {
1425    printf("%s ", identifier);
1426    ast_opt_array_dimensions_print(array_specifier);
1427
1428    if (initializer) {
1429       printf("= ");
1430       initializer->print();
1431    }
1432 }
1433
1434
1435 ast_declaration::ast_declaration(const char *identifier,
1436                                  ast_array_specifier *array_specifier,
1437                                  ast_expression *initializer)
1438 {
1439    this->identifier = identifier;
1440    this->array_specifier = array_specifier;
1441    this->initializer = initializer;
1442 }
1443
1444
1445 void
1446 ast_declarator_list::print(void) const
1447 {
1448    assert(type || invariant);
1449
1450    if (type)
1451       type->print();
1452    else if (invariant)
1453       printf("invariant ");
1454    else
1455       printf("precise ");
1456
1457    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1458       if (&ast->link != this->declarations.get_head())
1459          printf(", ");
1460
1461       ast->print();
1462    }
1463
1464    printf("; ");
1465 }
1466
1467
1468 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1469 {
1470    this->type = type;
1471    this->invariant = false;
1472    this->precise = false;
1473 }
1474
1475 void
1476 ast_jump_statement::print(void) const
1477 {
1478    switch (mode) {
1479    case ast_continue:
1480       printf("continue; ");
1481       break;
1482    case ast_break:
1483       printf("break; ");
1484       break;
1485    case ast_return:
1486       printf("return ");
1487       if (opt_return_value)
1488          opt_return_value->print();
1489
1490       printf("; ");
1491       break;
1492    case ast_discard:
1493       printf("discard; ");
1494       break;
1495    }
1496 }
1497
1498
1499 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1500    : opt_return_value(NULL)
1501 {
1502    this->mode = ast_jump_modes(mode);
1503
1504    if (mode == ast_return)
1505       opt_return_value = return_value;
1506 }
1507
1508
1509 void
1510 ast_selection_statement::print(void) const
1511 {
1512    printf("if ( ");
1513    condition->print();
1514    printf(") ");
1515
1516    then_statement->print();
1517
1518    if (else_statement) {
1519       printf("else ");
1520       else_statement->print();
1521    }
1522 }
1523
1524
1525 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1526                                                  ast_node *then_statement,
1527                                                  ast_node *else_statement)
1528 {
1529    this->condition = condition;
1530    this->then_statement = then_statement;
1531    this->else_statement = else_statement;
1532 }
1533
1534
1535 void
1536 ast_switch_statement::print(void) const
1537 {
1538    printf("switch ( ");
1539    test_expression->print();
1540    printf(") ");
1541
1542    body->print();
1543 }
1544
1545
1546 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1547                                            ast_node *body)
1548 {
1549    this->test_expression = test_expression;
1550    this->body = body;
1551 }
1552
1553
1554 void
1555 ast_switch_body::print(void) const
1556 {
1557    printf("{\n");
1558    if (stmts != NULL) {
1559       stmts->print();
1560    }
1561    printf("}\n");
1562 }
1563
1564
1565 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1566 {
1567    this->stmts = stmts;
1568 }
1569
1570
1571 void ast_case_label::print(void) const
1572 {
1573    if (test_value != NULL) {
1574       printf("case ");
1575       test_value->print();
1576       printf(": ");
1577    } else {
1578       printf("default: ");
1579    }
1580 }
1581
1582
1583 ast_case_label::ast_case_label(ast_expression *test_value)
1584 {
1585    this->test_value = test_value;
1586 }
1587
1588
1589 void ast_case_label_list::print(void) const
1590 {
1591    foreach_list_typed(ast_node, ast, link, & this->labels) {
1592       ast->print();
1593    }
1594    printf("\n");
1595 }
1596
1597
1598 ast_case_label_list::ast_case_label_list(void)
1599 {
1600 }
1601
1602
1603 void ast_case_statement::print(void) const
1604 {
1605    labels->print();
1606    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1607       ast->print();
1608       printf("\n");
1609    }
1610 }
1611
1612
1613 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1614 {
1615    this->labels = labels;
1616 }
1617
1618
1619 void ast_case_statement_list::print(void) const
1620 {
1621    foreach_list_typed(ast_node, ast, link, & this->cases) {
1622       ast->print();
1623    }
1624 }
1625
1626
1627 ast_case_statement_list::ast_case_statement_list(void)
1628 {
1629 }
1630
1631
1632 void
1633 ast_iteration_statement::print(void) const
1634 {
1635    switch (mode) {
1636    case ast_for:
1637       printf("for( ");
1638       if (init_statement)
1639          init_statement->print();
1640       printf("; ");
1641
1642       if (condition)
1643          condition->print();
1644       printf("; ");
1645
1646       if (rest_expression)
1647          rest_expression->print();
1648       printf(") ");
1649
1650       body->print();
1651       break;
1652
1653    case ast_while:
1654       printf("while ( ");
1655       if (condition)
1656          condition->print();
1657       printf(") ");
1658       body->print();
1659       break;
1660
1661    case ast_do_while:
1662       printf("do ");
1663       body->print();
1664       printf("while ( ");
1665       if (condition)
1666          condition->print();
1667       printf("); ");
1668       break;
1669    }
1670 }
1671
1672
1673 ast_iteration_statement::ast_iteration_statement(int mode,
1674                                                  ast_node *init,
1675                                                  ast_node *condition,
1676                                                  ast_expression *rest_expression,
1677                                                  ast_node *body)
1678 {
1679    this->mode = ast_iteration_modes(mode);
1680    this->init_statement = init;
1681    this->condition = condition;
1682    this->rest_expression = rest_expression;
1683    this->body = body;
1684 }
1685
1686
1687 void
1688 ast_struct_specifier::print(void) const
1689 {
1690    printf("struct %s { ", name);
1691    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1692       ast->print();
1693    }
1694    printf("} ");
1695 }
1696
1697
1698 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1699                                            ast_declarator_list *declarator_list)
1700    : name(identifier), layout(NULL), declarations(), is_declaration(true),
1701      type(NULL)
1702 {
1703    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1704 }
1705
1706 void ast_subroutine_list::print(void) const
1707 {
1708    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1709       if (&ast->link != this->declarations.get_head())
1710          printf(", ");
1711       ast->print();
1712    }
1713 }
1714
1715 static void
1716 set_shader_inout_layout(struct gl_shader *shader,
1717                      struct _mesa_glsl_parse_state *state)
1718 {
1719    /* Should have been prevented by the parser. */
1720    if (shader->Stage != MESA_SHADER_GEOMETRY &&
1721        shader->Stage != MESA_SHADER_TESS_EVAL &&
1722        shader->Stage != MESA_SHADER_COMPUTE) {
1723       assert(!state->in_qualifier->flags.i);
1724    }
1725
1726    if (shader->Stage != MESA_SHADER_COMPUTE) {
1727       /* Should have been prevented by the parser. */
1728       assert(!state->cs_input_local_size_specified);
1729       assert(!state->cs_input_local_size_variable_specified);
1730       assert(state->cs_derivative_group == DERIVATIVE_GROUP_NONE);
1731    }
1732
1733    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1734       /* Should have been prevented by the parser. */
1735       assert(!state->fs_uses_gl_fragcoord);
1736       assert(!state->fs_redeclares_gl_fragcoord);
1737       assert(!state->fs_pixel_center_integer);
1738       assert(!state->fs_origin_upper_left);
1739       assert(!state->fs_early_fragment_tests);
1740       assert(!state->fs_inner_coverage);
1741       assert(!state->fs_post_depth_coverage);
1742       assert(!state->fs_pixel_interlock_ordered);
1743       assert(!state->fs_pixel_interlock_unordered);
1744       assert(!state->fs_sample_interlock_ordered);
1745       assert(!state->fs_sample_interlock_unordered);
1746    }
1747
1748    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1749       if (state->out_qualifier->out_xfb_stride[i]) {
1750          unsigned xfb_stride;
1751          if (state->out_qualifier->out_xfb_stride[i]->
1752                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1753                 true)) {
1754             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1755          }
1756       }
1757    }
1758
1759    switch (shader->Stage) {
1760    case MESA_SHADER_TESS_CTRL:
1761       shader->info.TessCtrl.VerticesOut = 0;
1762       if (state->tcs_output_vertices_specified) {
1763          unsigned vertices;
1764          if (state->out_qualifier->vertices->
1765                process_qualifier_constant(state, "vertices", &vertices,
1766                                           false)) {
1767
1768             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1769             if (vertices > state->Const.MaxPatchVertices) {
1770                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1771                                 "GL_MAX_PATCH_VERTICES", vertices);
1772             }
1773             shader->info.TessCtrl.VerticesOut = vertices;
1774          }
1775       }
1776       break;
1777    case MESA_SHADER_TESS_EVAL:
1778       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1779       if (state->in_qualifier->flags.q.prim_type)
1780          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1781
1782       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1783       if (state->in_qualifier->flags.q.vertex_spacing)
1784          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1785
1786       shader->info.TessEval.VertexOrder = 0;
1787       if (state->in_qualifier->flags.q.ordering)
1788          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1789
1790       shader->info.TessEval.PointMode = -1;
1791       if (state->in_qualifier->flags.q.point_mode)
1792          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1793       break;
1794    case MESA_SHADER_GEOMETRY:
1795       shader->info.Geom.VerticesOut = -1;
1796       if (state->out_qualifier->flags.q.max_vertices) {
1797          unsigned qual_max_vertices;
1798          if (state->out_qualifier->max_vertices->
1799                process_qualifier_constant(state, "max_vertices",
1800                                           &qual_max_vertices, true)) {
1801
1802             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1803                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1804                _mesa_glsl_error(&loc, state,
1805                                 "maximum output vertices (%d) exceeds "
1806                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1807                                 qual_max_vertices);
1808             }
1809             shader->info.Geom.VerticesOut = qual_max_vertices;
1810          }
1811       }
1812
1813       if (state->gs_input_prim_type_specified) {
1814          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1815       } else {
1816          shader->info.Geom.InputType = PRIM_UNKNOWN;
1817       }
1818
1819       if (state->out_qualifier->flags.q.prim_type) {
1820          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1821       } else {
1822          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1823       }
1824
1825       shader->info.Geom.Invocations = 0;
1826       if (state->in_qualifier->flags.q.invocations) {
1827          unsigned invocations;
1828          if (state->in_qualifier->invocations->
1829                process_qualifier_constant(state, "invocations",
1830                                           &invocations, false)) {
1831
1832             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1833             if (invocations > state->Const.MaxGeometryShaderInvocations) {
1834                _mesa_glsl_error(&loc, state,
1835                                 "invocations (%d) exceeds "
1836                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1837                                 invocations);
1838             }
1839             shader->info.Geom.Invocations = invocations;
1840          }
1841       }
1842       break;
1843
1844    case MESA_SHADER_COMPUTE:
1845       if (state->cs_input_local_size_specified) {
1846          for (int i = 0; i < 3; i++)
1847             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1848       } else {
1849          for (int i = 0; i < 3; i++)
1850             shader->info.Comp.LocalSize[i] = 0;
1851       }
1852
1853       shader->info.Comp.LocalSizeVariable =
1854          state->cs_input_local_size_variable_specified;
1855
1856       shader->info.Comp.DerivativeGroup = state->cs_derivative_group;
1857
1858       if (state->NV_compute_shader_derivatives_enable) {
1859          /* We allow multiple cs_input_layout nodes, but do not store them in
1860           * a convenient place, so for now live with an empty location error.
1861           */
1862          YYLTYPE loc = {0};
1863          if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_QUADS) {
1864             if (shader->info.Comp.LocalSize[0] % 2 != 0) {
1865                _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1866                                 "local group size whose first dimension "
1867                                 "is a multiple of 2\n");
1868             }
1869             if (shader->info.Comp.LocalSize[1] % 2 != 0) {
1870                _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1871                                 "local group size whose second dimension "
1872                                 "is a multiple of 2\n");
1873             }
1874          } else if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_LINEAR) {
1875             if ((shader->info.Comp.LocalSize[0] *
1876                  shader->info.Comp.LocalSize[1] *
1877                  shader->info.Comp.LocalSize[2]) % 4 != 0) {
1878                _mesa_glsl_error(&loc, state, "derivative_group_linearNV must be used with a "
1879                             "local group size whose total number of invocations "
1880                             "is a multiple of 4\n");
1881             }
1882          }
1883       }
1884
1885       break;
1886
1887    case MESA_SHADER_FRAGMENT:
1888       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1889       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1890       shader->pixel_center_integer = state->fs_pixel_center_integer;
1891       shader->origin_upper_left = state->fs_origin_upper_left;
1892       shader->ARB_fragment_coord_conventions_enable =
1893          state->ARB_fragment_coord_conventions_enable;
1894       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1895       shader->InnerCoverage = state->fs_inner_coverage;
1896       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1897       shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
1898       shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
1899       shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
1900       shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
1901       shader->BlendSupport = state->fs_blend_support;
1902       break;
1903
1904    default:
1905       /* Nothing to do. */
1906       break;
1907    }
1908
1909    shader->bindless_sampler = state->bindless_sampler_specified;
1910    shader->bindless_image = state->bindless_image_specified;
1911    shader->bound_sampler = state->bound_sampler_specified;
1912    shader->bound_image = state->bound_image_specified;
1913 }
1914
1915 /* src can be NULL if only the symbols found in the exec_list should be
1916  * copied
1917  */
1918 void
1919 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1920                                    struct glsl_symbol_table *src,
1921                                    struct glsl_symbol_table *dest)
1922 {
1923    foreach_in_list (ir_instruction, ir, shader_ir) {
1924       switch (ir->ir_type) {
1925       case ir_type_function:
1926          dest->add_function((ir_function *) ir);
1927          break;
1928       case ir_type_variable: {
1929          ir_variable *const var = (ir_variable *) ir;
1930
1931          if (var->data.mode != ir_var_temporary)
1932             dest->add_variable(var);
1933          break;
1934       }
1935       default:
1936          break;
1937       }
1938    }
1939
1940    if (src != NULL) {
1941       /* Explicitly copy the gl_PerVertex interface definitions because these
1942        * are needed to check they are the same during the interstage link.
1943        * They can’t necessarily be found via the exec_list because the members
1944        * might not be referenced. The GL spec still requires that they match
1945        * in that case.
1946        */
1947       const glsl_type *iface =
1948          src->get_interface("gl_PerVertex", ir_var_shader_in);
1949       if (iface)
1950          dest->add_interface(iface->name, iface, ir_var_shader_in);
1951
1952       iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1953       if (iface)
1954          dest->add_interface(iface->name, iface, ir_var_shader_out);
1955    }
1956 }
1957
1958 extern "C" {
1959
1960 static void
1961 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1962 {
1963    int j, k;
1964    int index = 0;
1965
1966    for (j = 0; j < state->num_subroutines; j++) {
1967       while (state->subroutines[j]->subroutine_index == -1) {
1968          for (k = 0; k < state->num_subroutines; k++) {
1969             if (state->subroutines[k]->subroutine_index == index)
1970                break;
1971             else if (k == state->num_subroutines - 1) {
1972                state->subroutines[j]->subroutine_index = index;
1973             }
1974          }
1975          index++;
1976       }
1977    }
1978 }
1979
1980 static void
1981 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1982                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1983                     struct glcpp_parser *data,
1984                     unsigned version,
1985                     bool es)
1986 {
1987    unsigned gl_version = state->ctx->Extensions.Version;
1988    gl_api api = state->ctx->API;
1989
1990    if (gl_version != 0xff) {
1991       unsigned i;
1992       for (i = 0; i < state->num_supported_versions; i++) {
1993          if (state->supported_versions[i].ver == version &&
1994              state->supported_versions[i].es == es) {
1995             gl_version = state->supported_versions[i].gl_ver;
1996             break;
1997          }
1998       }
1999
2000       if (i == state->num_supported_versions)
2001          return;
2002    }
2003
2004    if (es)
2005       api = API_OPENGLES2;
2006
2007    for (unsigned i = 0;
2008         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
2009       const _mesa_glsl_extension *extension
2010          = &_mesa_glsl_supported_extensions[i];
2011       if (extension->compatible_with_state(state, api, gl_version)) {
2012          add_builtin_define(data, extension->name, 1);
2013       }
2014    }
2015 }
2016
2017 /* Implements parsing checks that we can't do during parsing */
2018 static void
2019 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
2020 {
2021    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
2022       YYLTYPE loc;
2023       memset(&loc, 0, sizeof(loc));
2024       _mesa_glsl_error(&loc, state, "Compute shaders require "
2025                        "GLSL 4.30 or GLSL ES 3.10");
2026    }
2027 }
2028
2029 static void
2030 opt_shader_and_create_symbol_table(struct gl_context *ctx,
2031                                    struct glsl_symbol_table *source_symbols,
2032                                    struct gl_shader *shader)
2033 {
2034    assert(shader->CompileStatus != COMPILE_FAILURE &&
2035           !shader->ir->is_empty());
2036
2037    struct gl_shader_compiler_options *options =
2038       &ctx->Const.ShaderCompilerOptions[shader->Stage];
2039
2040    /* Do some optimization at compile time to reduce shader IR size
2041     * and reduce later work if the same shader is linked multiple times
2042     */
2043    if (ctx->Const.GLSLOptimizeConservatively) {
2044       /* Run it just once. */
2045       do_common_optimization(shader->ir, false, false, options,
2046                              ctx->Const.NativeIntegers);
2047    } else {
2048       /* Repeat it until it stops making changes. */
2049       while (do_common_optimization(shader->ir, false, false, options,
2050                                     ctx->Const.NativeIntegers))
2051          ;
2052    }
2053
2054    validate_ir_tree(shader->ir);
2055
2056    enum ir_variable_mode other;
2057    switch (shader->Stage) {
2058    case MESA_SHADER_VERTEX:
2059       other = ir_var_shader_in;
2060       break;
2061    case MESA_SHADER_FRAGMENT:
2062       other = ir_var_shader_out;
2063       break;
2064    default:
2065       /* Something invalid to ensure optimize_dead_builtin_uniforms
2066        * doesn't remove anything other than uniforms or constants.
2067        */
2068       other = ir_var_mode_count;
2069       break;
2070    }
2071
2072    optimize_dead_builtin_variables(shader->ir, other);
2073
2074    validate_ir_tree(shader->ir);
2075
2076    /* Retain any live IR, but trash the rest. */
2077    reparent_ir(shader->ir, shader->ir);
2078
2079    /* Destroy the symbol table.  Create a new symbol table that contains only
2080     * the variables and functions that still exist in the IR.  The symbol
2081     * table will be used later during linking.
2082     *
2083     * There must NOT be any freed objects still referenced by the symbol
2084     * table.  That could cause the linker to dereference freed memory.
2085     *
2086     * We don't have to worry about types or interface-types here because those
2087     * are fly-weights that are looked up by glsl_type.
2088     */
2089    _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2090                                       shader->symbols);
2091 }
2092
2093 void
2094 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2095                           bool dump_ast, bool dump_hir, bool force_recompile)
2096 {
2097    const char *source = force_recompile && shader->FallbackSource ?
2098       shader->FallbackSource : shader->Source;
2099
2100    if (!force_recompile) {
2101       if (ctx->Cache) {
2102          char buf[41];
2103          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2104                                 shader->sha1);
2105          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2106             /* We've seen this shader before and know it compiles */
2107             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2108                _mesa_sha1_format(buf, shader->sha1);
2109                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2110             }
2111             shader->CompileStatus = COMPILE_SKIPPED;
2112
2113             free((void *)shader->FallbackSource);
2114             shader->FallbackSource = NULL;
2115             return;
2116          }
2117       }
2118    } else {
2119       /* We should only ever end up here if a re-compile has been forced by a
2120        * shader cache miss. In which case we can skip the compile if its
2121        * already be done by a previous fallback or the initial compile call.
2122        */
2123       if (shader->CompileStatus == COMPILE_SUCCESS)
2124          return;
2125    }
2126
2127    struct _mesa_glsl_parse_state *state =
2128       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2129
2130    if (ctx->Const.GenerateTemporaryNames)
2131       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2132                               false, true);
2133
2134    state->error = glcpp_preprocess(state, &source, &state->info_log,
2135                                    add_builtin_defines, state, ctx);
2136
2137    if (!state->error) {
2138      _mesa_glsl_lexer_ctor(state, source);
2139      _mesa_glsl_parse(state);
2140      _mesa_glsl_lexer_dtor(state);
2141      do_late_parsing_checks(state);
2142    }
2143
2144    if (dump_ast) {
2145       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2146          ast->print();
2147       }
2148       printf("\n\n");
2149    }
2150
2151    ralloc_free(shader->ir);
2152    shader->ir = new(shader) exec_list;
2153    if (!state->error && !state->translation_unit.is_empty())
2154       _mesa_ast_to_hir(shader->ir, state);
2155
2156    if (!state->error) {
2157       validate_ir_tree(shader->ir);
2158
2159       /* Print out the unoptimized IR. */
2160       if (dump_hir) {
2161          _mesa_print_ir(stdout, shader->ir, state);
2162       }
2163    }
2164
2165    if (shader->InfoLog)
2166       ralloc_free(shader->InfoLog);
2167
2168    if (!state->error)
2169       set_shader_inout_layout(shader, state);
2170
2171    shader->symbols = new(shader->ir) glsl_symbol_table;
2172    shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2173    shader->InfoLog = state->info_log;
2174    shader->Version = state->language_version;
2175    shader->IsES = state->es_shader;
2176
2177    if (!state->error && !shader->ir->is_empty()) {
2178       assign_subroutine_indexes(state);
2179       lower_subroutine(shader->ir, state);
2180       opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2181    }
2182
2183    if (!force_recompile) {
2184       free((void *)shader->FallbackSource);
2185       shader->FallbackSource = NULL;
2186    }
2187
2188    delete state->symbols;
2189    ralloc_free(state);
2190
2191    if (ctx->Cache && shader->CompileStatus == COMPILE_SUCCESS) {
2192       char sha1_buf[41];
2193       disk_cache_put_key(ctx->Cache, shader->sha1);
2194       if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2195          _mesa_sha1_format(sha1_buf, shader->sha1);
2196          fprintf(stderr, "marking shader: %s\n", sha1_buf);
2197       }
2198    }
2199 }
2200
2201 } /* extern "C" */
2202 /**
2203  * Do the set of common optimizations passes
2204  *
2205  * \param ir                          List of instructions to be optimized
2206  * \param linked                      Is the shader linked?  This enables
2207  *                                    optimizations passes that remove code at
2208  *                                    global scope and could cause linking to
2209  *                                    fail.
2210  * \param uniform_locations_assigned  Have locations already been assigned for
2211  *                                    uniforms?  This prevents the declarations
2212  *                                    of unused uniforms from being removed.
2213  *                                    The setting of this flag only matters if
2214  *                                    \c linked is \c true.
2215  * \param options                     The driver's preferred shader options.
2216  * \param native_integers             Selects optimizations that depend on the
2217  *                                    implementations supporting integers
2218  *                                    natively (as opposed to supporting
2219  *                                    integers in floating point registers).
2220  */
2221 bool
2222 do_common_optimization(exec_list *ir, bool linked,
2223                        bool uniform_locations_assigned,
2224                        const struct gl_shader_compiler_options *options,
2225                        bool native_integers)
2226 {
2227    const bool debug = false;
2228    GLboolean progress = GL_FALSE;
2229
2230 #define OPT(PASS, ...) do {                                             \
2231       if (debug) {                                                      \
2232          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2233          const bool opt_progress = PASS(__VA_ARGS__);                   \
2234          progress = opt_progress || progress;                           \
2235          if (opt_progress)                                              \
2236             _mesa_print_ir(stderr, ir, NULL);                           \
2237          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2238                  #PASS, opt_progress ? "made" : "no");                  \
2239       } else {                                                          \
2240          progress = PASS(__VA_ARGS__) || progress;                      \
2241       }                                                                 \
2242    } while (false)
2243
2244    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2245
2246    if (linked) {
2247       OPT(do_function_inlining, ir);
2248       OPT(do_dead_functions, ir);
2249       OPT(do_structure_splitting, ir);
2250    }
2251    propagate_invariance(ir);
2252    OPT(do_if_simplification, ir);
2253    OPT(opt_flatten_nested_if_blocks, ir);
2254    OPT(opt_conditional_discard, ir);
2255    OPT(do_copy_propagation_elements, ir);
2256
2257    if (options->OptimizeForAOS && !linked)
2258       OPT(opt_flip_matrices, ir);
2259
2260    if (linked && options->OptimizeForAOS) {
2261       OPT(do_vectorize, ir);
2262    }
2263
2264    if (linked)
2265       OPT(do_dead_code, ir, uniform_locations_assigned);
2266    else
2267       OPT(do_dead_code_unlinked, ir);
2268    OPT(do_dead_code_local, ir);
2269    OPT(do_tree_grafting, ir);
2270    OPT(do_constant_propagation, ir);
2271    if (linked)
2272       OPT(do_constant_variable, ir);
2273    else
2274       OPT(do_constant_variable_unlinked, ir);
2275    OPT(do_constant_folding, ir);
2276    OPT(do_minmax_prune, ir);
2277    OPT(do_rebalance_tree, ir);
2278    OPT(do_algebraic, ir, native_integers, options);
2279    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2280        options->EmitNoCont, options->EmitNoLoops);
2281    OPT(do_vec_index_to_swizzle, ir);
2282    OPT(lower_vector_insert, ir, false);
2283    OPT(optimize_swizzles, ir);
2284
2285    OPT(optimize_split_arrays, ir, linked);
2286    OPT(optimize_redundant_jumps, ir);
2287
2288    if (options->MaxUnrollIterations) {
2289       loop_state *ls = analyze_loop_variables(ir);
2290       if (ls->loop_found) {
2291          bool loop_progress = unroll_loops(ir, ls, options);
2292          while (loop_progress) {
2293             loop_progress = false;
2294             loop_progress |= do_constant_propagation(ir);
2295             loop_progress |= do_if_simplification(ir);
2296
2297             /* Some drivers only call do_common_optimization() once rather
2298              * than in a loop. So we must call do_lower_jumps() after
2299              * unrolling a loop because for drivers that use LLVM validation
2300              * will fail if a jump is not the last instruction in the block.
2301              * For example the following will fail LLVM validation:
2302              *
2303              *   (loop (
2304              *      ...
2305              *   break
2306              *   (assign  (x) (var_ref v124)  (expression int + (var_ref v124)
2307              *      (constant int (1)) ) )
2308              *   ))
2309              */
2310             loop_progress |= do_lower_jumps(ir, true, true,
2311                                             options->EmitNoMainReturn,
2312                                             options->EmitNoCont,
2313                                             options->EmitNoLoops);
2314          }
2315          progress |= loop_progress;
2316       }
2317       delete ls;
2318    }
2319
2320 #undef OPT
2321
2322    return progress;
2323 }
2324
2325 extern "C" {
2326
2327 /**
2328  * To be called at GL teardown time, this frees compiler datastructures.
2329  *
2330  * After calling this, any previously compiled shaders and shader
2331  * programs would be invalid.  So this should happen at approximately
2332  * program exit.
2333  */
2334 void
2335 _mesa_destroy_shader_compiler(void)
2336 {
2337    _mesa_destroy_shader_compiler_caches();
2338
2339    _mesa_glsl_release_types();
2340 }
2341
2342 /**
2343  * Releases compiler caches to trade off performance for memory.
2344  *
2345  * Intended to be used with glReleaseShaderCompiler().
2346  */
2347 void
2348 _mesa_destroy_shader_compiler_caches(void)
2349 {
2350    _mesa_glsl_release_builtin_functions();
2351 }
2352
2353 }