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->found_begin_interlock = false;
 201    this->found_end_interlock = false;
 202    this->all_invariant = false;
 203    this->user_structures = NULL;
 204    this->num_user_structures = 0;
 205    this->num_subroutines = 0;
 206    this->subroutines = NULL;
 207    this->num_subroutine_types = 0;
 208    this->subroutine_types = NULL;
 209
 210    /* supported_versions should be large enough to support the known desktop
 211     * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
 212     */
 213    STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 4) ==
 214                  ARRAY_SIZE(this->supported_versions));
 215
 216    /* Populate the list of supported GLSL versions */
 217    /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
 218     * the OpenGL 3.2 Core context is supported, this logic will need
 219     * change.  Older versions of GLSL are no longer supported
 220     * outside the compatibility contexts of 3.x.
 221     */
 222    this->num_supported_versions = 0;
 223    if (_mesa_is_desktop_gl(ctx)) {
 224       for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
 225          if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
 226             this->supported_versions[this->num_supported_versions].ver
 227                = known_desktop_glsl_versions[i];
 228             this->supported_versions[this->num_supported_versions].gl_ver
 229                = known_desktop_gl_versions[i];
 230             this->supported_versions[this->num_supported_versions].es = false;
 231             this->num_supported_versions++;
 232          }
 233       }
 234    }
 235    if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
 236       this->supported_versions[this->num_supported_versions].ver = 100;
 237       this->supported_versions[this->num_supported_versions].gl_ver = 20;
 238       this->supported_versions[this->num_supported_versions].es = true;
 239       this->num_supported_versions++;
 240    }
 241    if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
 242       this->supported_versions[this->num_supported_versions].ver = 300;
 243       this->supported_versions[this->num_supported_versions].gl_ver = 30;
 244       this->supported_versions[this->num_supported_versions].es = true;
 245       this->num_supported_versions++;
 246    }
 247    if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
 248       this->supported_versions[this->num_supported_versions].ver = 310;
 249       this->supported_versions[this->num_supported_versions].gl_ver = 31;
 250       this->supported_versions[this->num_supported_versions].es = true;
 251       this->num_supported_versions++;
 252    }
 253    if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
 254        ctx->Extensions.ARB_ES3_2_compatibility) {
 255       this->supported_versions[this->num_supported_versions].ver = 320;
 256       this->supported_versions[this->num_supported_versions].gl_ver = 32;
 257       this->supported_versions[this->num_supported_versions].es = true;
 258       this->num_supported_versions++;
 259    }
 260
 261    /* Create a string for use in error messages to tell the user which GLSL
 262     * versions are supported.
 263     */
 264    char *supported = ralloc_strdup(this, "");
 265    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 266       unsigned ver = this->supported_versions[i].ver;
 267       const char *const prefix = (i == 0)
 268          ? ""
 269          : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
 270       const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
 271
 272       ralloc_asprintf_append(& supported, "%s%u.%02u%s",
 273                              prefix,
 274                              ver / 100, ver % 100,
 275                              suffix);
 276    }
 277
 278    this->supported_version_string = supported;
 279
 280    if (ctx->Const.ForceGLSLExtensionsWarn)
 281       _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
 282
 283    this->default_uniform_qualifier = new(this) ast_type_qualifier();
 284    this->default_uniform_qualifier->flags.q.shared = 1;
 285    this->default_uniform_qualifier->flags.q.column_major = 1;
 286
 287    this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
 288    this->default_shader_storage_qualifier->flags.q.shared = 1;
 289    this->default_shader_storage_qualifier->flags.q.column_major = 1;
 290
 291    this->fs_uses_gl_fragcoord = false;
 292    this->fs_redeclares_gl_fragcoord = false;
 293    this->fs_origin_upper_left = false;
 294    this->fs_pixel_center_integer = false;
 295    this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
 296
 297    this->gs_input_prim_type_specified = false;
 298    this->tcs_output_vertices_specified = false;
 299    this->gs_input_size = 0;
 300    this->in_qualifier = new(this) ast_type_qualifier();
 301    this->out_qualifier = new(this) ast_type_qualifier();
 302    this->fs_early_fragment_tests = false;
 303    this->fs_inner_coverage = false;
 304    this->fs_post_depth_coverage = false;
 305    this->fs_pixel_interlock_ordered = false;
 306    this->fs_pixel_interlock_unordered = false;
 307    this->fs_sample_interlock_ordered = false;
 308    this->fs_sample_interlock_unordered = false;
 309    this->fs_blend_support = 0;
 310    memset(this->atomic_counter_offsets, 0,
 311           sizeof(this->atomic_counter_offsets));
 312    this->allow_extension_directive_midshader =
 313       ctx->Const.AllowGLSLExtensionDirectiveMidShader;
 314    this->allow_builtin_variable_redeclaration =
 315       ctx->Const.AllowGLSLBuiltinVariableRedeclaration;
 316    this->allow_layout_qualifier_on_function_parameter =
 317       ctx->Const.AllowLayoutQualifiersOnFunctionParameters;
 318
 319    this->cs_input_local_size_variable_specified = false;
 320
 321    /* ARB_bindless_texture */
 322    this->bindless_sampler_specified = false;
 323    this->bindless_image_specified = false;
 324    this->bound_sampler_specified = false;
 325    this->bound_image_specified = false;
 326 }
 327
 328 /**
 329  * Determine whether the current GLSL version is sufficiently high to support
 330  * a certain feature, and generate an error message if it isn't.
 331  *
 332  * \param required_glsl_version and \c required_glsl_es_version are
 333  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 334  *
 335  * \param locp is the parser location where the error should be reported.
 336  *
 337  * \param fmt (and additional arguments) constitute a printf-style error
 338  * message to report if the version check fails.  Information about the
 339  * current and required GLSL versions will be appended.  So, for example, if
 340  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 341  * "foo unsupported") is called, the error message will be "foo unsupported in
 342  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 343  */
 344 bool
 345 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 346                                       unsigned required_glsl_es_version,
 347                                       YYLTYPE *locp, const char *fmt, ...)
 348 {
 349    if (this->is_version(required_glsl_version, required_glsl_es_version))
 350       return true;
 351
 352    va_list args;
 353    va_start(args, fmt);
 354    char *problem = ralloc_vasprintf(this, fmt, args);
 355    va_end(args);
 356    const char *glsl_version_string
 357       = glsl_compute_version_string(this, false, required_glsl_version);
 358    const char *glsl_es_version_string
 359       = glsl_compute_version_string(this, true, required_glsl_es_version);
 360    const char *requirement_string = "";
 361    if (required_glsl_version && required_glsl_es_version) {
 362       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 363                                            glsl_version_string,
 364                                            glsl_es_version_string);
 365    } else if (required_glsl_version) {
 366       requirement_string = ralloc_asprintf(this, " (%s required)",
 367                                            glsl_version_string);
 368    } else if (required_glsl_es_version) {
 369       requirement_string = ralloc_asprintf(this, " (%s required)",
 370                                            glsl_es_version_string);
 371    }
 372    _mesa_glsl_error(locp, this, "%s in %s%s",
 373                     problem, this->get_version_string(),
 374                     requirement_string);
 375
 376    return false;
 377 }
 378
 379 /**
 380  * Process a GLSL #version directive.
 381  *
 382  * \param version is the integer that follows the #version token.
 383  *
 384  * \param ident is a string identifier that follows the integer, if any is
 385  * present.  Otherwise NULL.
 386  */
 387 void
 388 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 389                                                   const char *ident)
 390 {
 391    bool es_token_present = false;
 392    bool compat_token_present = false;
 393    if (ident) {
 394       if (strcmp(ident, "es") == 0) {
 395          es_token_present = true;
 396       } else if (version >= 150) {
 397          if (strcmp(ident, "core") == 0) {
 398             /* Accept the token.  There's no need to record that this is
 399              * a core profile shader since that's the only profile we support.
 400              */
 401          } else if (strcmp(ident, "compatibility") == 0) {
 402             compat_token_present = true;
 403
 404             if (this->ctx->API != API_OPENGL_COMPAT) {
 405                _mesa_glsl_error(locp, this,
 406                                 "the compatibility profile is not supported");
 407             }
 408          } else {
 409             _mesa_glsl_error(locp, this,
 410                              "\"%s\" is not a valid shading language profile; "
 411                              "if present, it must be \"core\"", ident);
 412          }
 413       } else {
 414          _mesa_glsl_error(locp, this,
 415                           "illegal text following version number");
 416       }
 417    }
 418
 419    this->es_shader = es_token_present;
 420    if (version == 100) {
 421       if (es_token_present) {
 422          _mesa_glsl_error(locp, this,
 423                           "GLSL 1.00 ES should be selected using "
 424                           "`#version 100'");
 425       } else {
 426          this->es_shader = true;
 427       }
 428    }
 429
 430    if (this->es_shader) {
 431       this->ARB_texture_rectangle_enable = false;
 432    }
 433
 434    if (this->forced_language_version)
 435       this->language_version = this->forced_language_version;
 436    else
 437       this->language_version = version;
 438
 439    this->compat_shader = compat_token_present ||
 440                          (this->ctx->API == API_OPENGL_COMPAT &&
 441                           this->language_version == 140) ||
 442                          (!this->es_shader && this->language_version < 140);
 443
 444    bool supported = false;
 445    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 446       if (this->supported_versions[i].ver == this->language_version
 447           && this->supported_versions[i].es == this->es_shader) {
 448          this->gl_version = this->supported_versions[i].gl_ver;
 449          supported = true;
 450          break;
 451       }
 452    }
 453
 454    if (!supported) {
 455       _mesa_glsl_error(locp, this, "%s is not supported. "
 456                        "Supported versions are: %s",
 457                        this->get_version_string(),
 458                        this->supported_version_string);
 459
 460       /* On exit, the language_version must be set to a valid value.
 461        * Later calls to _mesa_glsl_initialize_types will misbehave if
 462        * the version is invalid.
 463        */
 464       switch (this->ctx->API) {
 465       case API_OPENGL_COMPAT:
 466       case API_OPENGL_CORE:
 467          this->language_version = this->ctx->Const.GLSLVersion;
 468          break;
 469
 470       case API_OPENGLES:
 471          assert(!"Should not get here.");
 472          /* FALLTHROUGH */
 473
 474       case API_OPENGLES2:
 475          this->language_version = 100;
 476          break;
 477       }
 478    }
 479 }
 480
 481
 482 /* This helper function will append the given message to the shader's
 483    info log and report it via GL_ARB_debug_output. Per that extension,
 484    'type' is one of the enum values classifying the message, and
 485    'id' is the implementation-defined ID of the given message. */
 486 static void
 487 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 488                GLenum type, const char *fmt, va_list ap)
 489 {
 490    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 491    GLuint msg_id = 0;
 492
 493    assert(state->info_log != NULL);
 494
 495    /* Get the offset that the new message will be written to. */
 496    int msg_offset = strlen(state->info_log);
 497
 498    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 499                                             locp->source,
 500                                             locp->first_line,
 501                                             locp->first_column,
 502                                             error ? "error" : "warning");
 503    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 504
 505    const char *const msg = &state->info_log[msg_offset];
 506    struct gl_context *ctx = state->ctx;
 507
 508    /* Report the error via GL_ARB_debug_output. */
 509    _mesa_shader_debug(ctx, type, &msg_id, msg);
 510
 511    ralloc_strcat(&state->info_log, "\n");
 512 }
 513
 514 void
 515 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 516                  const char *fmt, ...)
 517 {
 518    va_list ap;
 519
 520    state->error = true;
 521
 522    va_start(ap, fmt);
 523    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 524    va_end(ap);
 525 }
 526
 527
 528 void
 529 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 530                    const char *fmt, ...)
 531 {
 532    if (state->warnings_enabled) {
 533       va_list ap;
 534
 535       va_start(ap, fmt);
 536       _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 537       va_end(ap);
 538    }
 539 }
 540
 541
 542 /**
 543  * Enum representing the possible behaviors that can be specified in
 544  * an #extension directive.
 545  */
 546 enum ext_behavior {
 547    extension_disable,
 548    extension_enable,
 549    extension_require,
 550    extension_warn
 551 };
 552
 553 /**
 554  * Element type for _mesa_glsl_supported_extensions
 555  */
 556 struct _mesa_glsl_extension {
 557    /**
 558     * Name of the extension when referred to in a GLSL extension
 559     * statement
 560     */
 561    const char *name;
 562
 563    /**
 564     * Whether this extension is a part of AEP
 565     */
 566    bool aep;
 567
 568    /**
 569     * Predicate that checks whether the relevant extension is available for
 570     * this context.
 571     */
 572    bool (*available_pred)(const struct gl_context *,
 573                           gl_api api, uint8_t version);
 574
 575    /**
 576     * Flag in the _mesa_glsl_parse_state struct that should be set
 577     * when this extension is enabled.
 578     *
 579     * See note in _mesa_glsl_extension::supported_flag about "pointer
 580     * to member" types.
 581     */
 582    bool _mesa_glsl_parse_state::* enable_flag;
 583
 584    /**
 585     * Flag in the _mesa_glsl_parse_state struct that should be set
 586     * when the shader requests "warn" behavior for this extension.
 587     *
 588     * See note in _mesa_glsl_extension::supported_flag about "pointer
 589     * to member" types.
 590     */
 591    bool _mesa_glsl_parse_state::* warn_flag;
 592
 593
 594    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 595                               gl_api api, uint8_t gl_version) const;
 596    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 597 };
 598
 599 /** Checks if the context supports a user-facing extension */
 600 #define EXT(name_str, driver_cap, ...) \
 601 static UNUSED bool \
 602 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 603 { \
 604    return ctx->Extensions.driver_cap && (version >= \
 605           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 606 }
 607 #include "main/extensions_table.h"
 608 #undef EXT
 609
 610 #define EXT(NAME)                                           \
 611    { "GL_" #NAME, false, has_##NAME,                        \
 612      &_mesa_glsl_parse_state::NAME##_enable,                \
 613      &_mesa_glsl_parse_state::NAME##_warn }
 614
 615 #define EXT_AEP(NAME)                                       \
 616    { "GL_" #NAME, true, has_##NAME,                         \
 617      &_mesa_glsl_parse_state::NAME##_enable,                \
 618      &_mesa_glsl_parse_state::NAME##_warn }
 619
 620 /**
 621  * Table of extensions that can be enabled/disabled within a shader,
 622  * and the conditions under which they are supported.
 623  */
 624 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 625    /* ARB extensions go here, sorted alphabetically.
 626     */
 627    EXT(ARB_ES3_1_compatibility),
 628    EXT(ARB_ES3_2_compatibility),
 629    EXT(ARB_arrays_of_arrays),
 630    EXT(ARB_bindless_texture),
 631    EXT(ARB_compatibility),
 632    EXT(ARB_compute_shader),
 633    EXT(ARB_compute_variable_group_size),
 634    EXT(ARB_conservative_depth),
 635    EXT(ARB_cull_distance),
 636    EXT(ARB_derivative_control),
 637    EXT(ARB_draw_buffers),
 638    EXT(ARB_draw_instanced),
 639    EXT(ARB_enhanced_layouts),
 640    EXT(ARB_explicit_attrib_location),
 641    EXT(ARB_explicit_uniform_location),
 642    EXT(ARB_fragment_coord_conventions),
 643    EXT(ARB_fragment_layer_viewport),
 644    EXT(ARB_fragment_shader_interlock),
 645    EXT(ARB_gpu_shader5),
 646    EXT(ARB_gpu_shader_fp64),
 647    EXT(ARB_gpu_shader_int64),
 648    EXT(ARB_post_depth_coverage),
 649    EXT(ARB_sample_shading),
 650    EXT(ARB_separate_shader_objects),
 651    EXT(ARB_shader_atomic_counter_ops),
 652    EXT(ARB_shader_atomic_counters),
 653    EXT(ARB_shader_ballot),
 654    EXT(ARB_shader_bit_encoding),
 655    EXT(ARB_shader_clock),
 656    EXT(ARB_shader_draw_parameters),
 657    EXT(ARB_shader_group_vote),
 658    EXT(ARB_shader_image_load_store),
 659    EXT(ARB_shader_image_size),
 660    EXT(ARB_shader_precision),
 661    EXT(ARB_shader_stencil_export),
 662    EXT(ARB_shader_storage_buffer_object),
 663    EXT(ARB_shader_subroutine),
 664    EXT(ARB_shader_texture_image_samples),
 665    EXT(ARB_shader_texture_lod),
 666    EXT(ARB_shader_viewport_layer_array),
 667    EXT(ARB_shading_language_420pack),
 668    EXT(ARB_shading_language_packing),
 669    EXT(ARB_tessellation_shader),
 670    EXT(ARB_texture_cube_map_array),
 671    EXT(ARB_texture_gather),
 672    EXT(ARB_texture_multisample),
 673    EXT(ARB_texture_query_levels),
 674    EXT(ARB_texture_query_lod),
 675    EXT(ARB_texture_rectangle),
 676    EXT(ARB_uniform_buffer_object),
 677    EXT(ARB_vertex_attrib_64bit),
 678    EXT(ARB_viewport_array),
 679
 680    /* KHR extensions go here, sorted alphabetically.
 681     */
 682    EXT_AEP(KHR_blend_equation_advanced),
 683
 684    /* OES extensions go here, sorted alphabetically.
 685     */
 686    EXT(OES_EGL_image_external),
 687    EXT(OES_EGL_image_external_essl3),
 688    EXT(OES_geometry_point_size),
 689    EXT(OES_geometry_shader),
 690    EXT(OES_gpu_shader5),
 691    EXT(OES_primitive_bounding_box),
 692    EXT_AEP(OES_sample_variables),
 693    EXT_AEP(OES_shader_image_atomic),
 694    EXT(OES_shader_io_blocks),
 695    EXT_AEP(OES_shader_multisample_interpolation),
 696    EXT(OES_standard_derivatives),
 697    EXT(OES_tessellation_point_size),
 698    EXT(OES_tessellation_shader),
 699    EXT(OES_texture_3D),
 700    EXT(OES_texture_buffer),
 701    EXT(OES_texture_cube_map_array),
 702    EXT_AEP(OES_texture_storage_multisample_2d_array),
 703    EXT(OES_viewport_array),
 704
 705    /* All other extensions go here, sorted alphabetically.
 706     */
 707    EXT(AMD_conservative_depth),
 708    EXT(AMD_gpu_shader_int64),
 709    EXT(AMD_shader_stencil_export),
 710    EXT(AMD_shader_trinary_minmax),
 711    EXT(AMD_texture_texture4),
 712    EXT(AMD_vertex_shader_layer),
 713    EXT(AMD_vertex_shader_viewport_index),
 714    EXT(ANDROID_extension_pack_es31a),
 715    EXT(EXT_blend_func_extended),
 716    EXT(EXT_frag_depth),
 717    EXT(EXT_draw_buffers),
 718    EXT(EXT_clip_cull_distance),
 719    EXT(EXT_geometry_point_size),
 720    EXT_AEP(EXT_geometry_shader),
 721    EXT(EXT_gpu_shader4),
 722    EXT_AEP(EXT_gpu_shader5),
 723    EXT_AEP(EXT_primitive_bounding_box),
 724    EXT(EXT_separate_shader_objects),
 725    EXT(EXT_shader_framebuffer_fetch),
 726    EXT(EXT_shader_framebuffer_fetch_non_coherent),
 727    EXT(EXT_shader_image_load_formatted),
 728    EXT(EXT_shader_implicit_conversions),
 729    EXT(EXT_shader_integer_mix),
 730    EXT_AEP(EXT_shader_io_blocks),
 731    EXT(EXT_shader_samples_identical),
 732    EXT(EXT_tessellation_point_size),
 733    EXT_AEP(EXT_tessellation_shader),
 734    EXT(EXT_texture_array),
 735    EXT_AEP(EXT_texture_buffer),
 736    EXT_AEP(EXT_texture_cube_map_array),
 737    EXT(EXT_texture_query_lod),
 738    EXT(EXT_texture_shadow_lod),
 739    EXT(INTEL_conservative_rasterization),
 740    EXT(INTEL_shader_atomic_float_minmax),
 741    EXT(MESA_shader_integer_functions),
 742    EXT(NV_compute_shader_derivatives),
 743    EXT(NV_fragment_shader_interlock),
 744    EXT(NV_image_formats),
 745    EXT(NV_shader_atomic_float),
 746 };
 747
 748 #undef EXT
 749
 750
 751 /**
 752  * Determine whether a given extension is compatible with the target,
 753  * API, and extension information in the current parser state.
 754  */
 755 bool _mesa_glsl_extension::compatible_with_state(
 756       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 757 {
 758    return this->available_pred(state->ctx, api, gl_version);
 759 }
 760
 761 /**
 762  * Set the appropriate flags in the parser state to establish the
 763  * given behavior for this extension.
 764  */
 765 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 766                                      ext_behavior behavior) const
 767 {
 768    /* Note: the ->* operator indexes into state by the
 769     * offsets this->enable_flag and this->warn_flag.  See
 770     * _mesa_glsl_extension::supported_flag for more info.
 771     */
 772    state->*(this->enable_flag) = (behavior != extension_disable);
 773    state->*(this->warn_flag)   = (behavior == extension_warn);
 774 }
 775
 776 /**
 777  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 778  * the name is not found, return NULL.
 779  */
 780 static const _mesa_glsl_extension *find_extension(const char *name)
 781 {
 782    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 783       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 784          return &_mesa_glsl_supported_extensions[i];
 785       }
 786    }
 787    return NULL;
 788 }
 789
 790 bool
 791 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 792                              const char *behavior_string, YYLTYPE *behavior_locp,
 793                              _mesa_glsl_parse_state *state)
 794 {
 795    uint8_t gl_version = state->ctx->Extensions.Version;
 796    gl_api api = state->ctx->API;
 797    ext_behavior behavior;
 798    if (strcmp(behavior_string, "warn") == 0) {
 799       behavior = extension_warn;
 800    } else if (strcmp(behavior_string, "require") == 0) {
 801       behavior = extension_require;
 802    } else if (strcmp(behavior_string, "enable") == 0) {
 803       behavior = extension_enable;
 804    } else if (strcmp(behavior_string, "disable") == 0) {
 805       behavior = extension_disable;
 806    } else {
 807       _mesa_glsl_error(behavior_locp, state,
 808                        "unknown extension behavior `%s'",
 809                        behavior_string);
 810       return false;
 811    }
 812
 813    /* If we're in a desktop context but with an ES shader, use an ES API enum
 814     * to verify extension availability.
 815     */
 816    if (state->es_shader && api != API_OPENGLES2)
 817       api = API_OPENGLES2;
 818    /* Use the language-version derived GL version to extension checks, unless
 819     * we're using meta, which sets the version to the max.
 820     */
 821    if (gl_version != 0xff)
 822       gl_version = state->gl_version;
 823
 824    if (strcmp(name, "all") == 0) {
 825       if ((behavior == extension_enable) || (behavior == extension_require)) {
 826          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 827                           (behavior == extension_enable)
 828                           ? "enable" : "require");
 829          return false;
 830       } else {
 831          for (unsigned i = 0;
 832               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 833             const _mesa_glsl_extension *extension
 834                = &_mesa_glsl_supported_extensions[i];
 835             if (extension->compatible_with_state(state, api, gl_version)) {
 836                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 837             }
 838          }
 839       }
 840    } else {
 841       const _mesa_glsl_extension *extension = find_extension(name);
 842       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 843          extension->set_flags(state, behavior);
 844          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 845             for (unsigned i = 0;
 846                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 847                const _mesa_glsl_extension *extension =
 848                   &_mesa_glsl_supported_extensions[i];
 849
 850                if (!extension->aep)
 851                   continue;
 852                /* AEP should not be enabled if all of the sub-extensions can't
 853                 * also be enabled. This is not the proper layer to do such
 854                 * error-checking though.
 855                 */
 856                assert(extension->compatible_with_state(state, api, gl_version));
 857                extension->set_flags(state, behavior);
 858             }
 859          }
 860       } else {
 861          static const char fmt[] = "extension `%s' unsupported in %s shader";
 862
 863          if (behavior == extension_require) {
 864             _mesa_glsl_error(name_locp, state, fmt,
 865                              name, _mesa_shader_stage_to_string(state->stage));
 866             return false;
 867          } else {
 868             _mesa_glsl_warning(name_locp, state, fmt,
 869                                name, _mesa_shader_stage_to_string(state->stage));
 870          }
 871       }
 872    }
 873
 874    return true;
 875 }
 876
 877
 878 /**
 879  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 880  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 881  * (process_array_constructor, et al) sufficient information to do type
 882  * checking.
 883  *
 884  * Operates on assignments involving an aggregate initializer. E.g.,
 885  *
 886  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 887  *
 888  * or more ridiculously,
 889  *
 890  * struct S {
 891  *     vec4 v[2];
 892  * };
 893  *
 894  * struct {
 895  *     S a[2], b;
 896  *     int c;
 897  * } aggregate = {
 898  *     {
 899  *         {
 900  *             {
 901  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 902  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 903  *             } // a[0].v
 904  *         }, // a[0]
 905  *         {
 906  *             {
 907  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 908  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 909  *             } // a[1].v
 910  *         } // a[1]
 911  *     }, // a
 912  *     {
 913  *         {
 914  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 915  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 916  *         } // b.v
 917  *     }, // b
 918  *     4 // c
 919  * };
 920  *
 921  * This pass is necessary because the right-hand side of <type> e = { ... }
 922  * doesn't contain sufficient information to determine if the types match.
 923  */
 924 void
 925 _mesa_ast_set_aggregate_type(const glsl_type *type,
 926                              ast_expression *expr)
 927 {
 928    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 929    ai->constructor_type = type;
 930
 931    /* If the aggregate is an array, recursively set its elements' types. */
 932    if (type->is_array()) {
 933       /* Each array element has the type type->fields.array.
 934        *
 935        * E.g., if <type> if struct S[2] we want to set each element's type to
 936        * struct S.
 937        */
 938       for (exec_node *expr_node = ai->expressions.get_head_raw();
 939            !expr_node->is_tail_sentinel();
 940            expr_node = expr_node->next) {
 941          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 942                                                link);
 943
 944          if (expr->oper == ast_aggregate)
 945             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 946       }
 947
 948    /* If the aggregate is a struct, recursively set its fields' types. */
 949    } else if (type->is_struct()) {
 950       exec_node *expr_node = ai->expressions.get_head_raw();
 951
 952       /* Iterate through the struct's fields. */
 953       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 954            i++, expr_node = expr_node->next) {
 955          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 956                                                link);
 957
 958          if (expr->oper == ast_aggregate) {
 959             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 960          }
 961       }
 962    /* If the aggregate is a matrix, set its columns' types. */
 963    } else if (type->is_matrix()) {
 964       for (exec_node *expr_node = ai->expressions.get_head_raw();
 965            !expr_node->is_tail_sentinel();
 966            expr_node = expr_node->next) {
 967          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 968                                                link);
 969
 970          if (expr->oper == ast_aggregate)
 971             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 972       }
 973    }
 974 }
 975
 976 void
 977 _mesa_ast_process_interface_block(YYLTYPE *locp,
 978                                   _mesa_glsl_parse_state *state,
 979                                   ast_interface_block *const block,
 980                                   const struct ast_type_qualifier &q)
 981 {
 982    if (q.flags.q.buffer) {
 983       if (!state->has_shader_storage_buffer_objects()) {
 984          _mesa_glsl_error(locp, state,
 985                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 986                           "required for defining shader storage blocks");
 987       } else if (state->ARB_shader_storage_buffer_object_warn) {
 988          _mesa_glsl_warning(locp, state,
 989                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 990                             "required for defining shader storage blocks");
 991       }
 992    } else if (q.flags.q.uniform) {
 993       if (!state->has_uniform_buffer_objects()) {
 994          _mesa_glsl_error(locp, state,
 995                           "#version 140 / GL_ARB_uniform_buffer_object "
 996                           "required for defining uniform blocks");
 997       } else if (state->ARB_uniform_buffer_object_warn) {
 998          _mesa_glsl_warning(locp, state,
 999                             "#version 140 / GL_ARB_uniform_buffer_object "
1000                             "required for defining uniform blocks");
1001       }
1002    } else {
1003       if (!state->has_shader_io_blocks()) {
1004          if (state->es_shader) {
1005             _mesa_glsl_error(locp, state,
1006                              "GL_OES_shader_io_blocks or #version 320 "
1007                              "required for using interface blocks");
1008          } else {
1009             _mesa_glsl_error(locp, state,
1010                              "#version 150 required for using "
1011                              "interface blocks");
1012          }
1013       }
1014    }
1015
1016    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
1017     * "It is illegal to have an input block in a vertex shader
1018     *  or an output block in a fragment shader"
1019     */
1020    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
1021       _mesa_glsl_error(locp, state,
1022                        "`in' interface block is not allowed for "
1023                        "a vertex shader");
1024    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
1025       _mesa_glsl_error(locp, state,
1026                        "`out' interface block is not allowed for "
1027                        "a fragment shader");
1028    }
1029
1030    /* Since block arrays require names, and both features are added in
1031     * the same language versions, we don't have to explicitly
1032     * version-check both things.
1033     */
1034    if (block->instance_name != NULL) {
1035       state->check_version(150, 300, locp, "interface blocks with "
1036                            "an instance name are not allowed");
1037    }
1038
1039    ast_type_qualifier::bitset_t interface_type_mask;
1040    struct ast_type_qualifier temp_type_qualifier;
1041
1042    /* Get a bitmask containing only the in/out/uniform/buffer
1043     * flags, allowing us to ignore other irrelevant flags like
1044     * interpolation qualifiers.
1045     */
1046    temp_type_qualifier.flags.i = 0;
1047    temp_type_qualifier.flags.q.uniform = true;
1048    temp_type_qualifier.flags.q.in = true;
1049    temp_type_qualifier.flags.q.out = true;
1050    temp_type_qualifier.flags.q.buffer = true;
1051    temp_type_qualifier.flags.q.patch = true;
1052    interface_type_mask = temp_type_qualifier.flags.i;
1053
1054    /* Get the block's interface qualifier.  The interface_qualifier
1055     * production rule guarantees that only one bit will be set (and
1056     * it will be in/out/uniform).
1057     */
1058    ast_type_qualifier::bitset_t block_interface_qualifier = q.flags.i;
1059
1060    block->default_layout.flags.i |= block_interface_qualifier;
1061
1062    if (state->stage == MESA_SHADER_GEOMETRY &&
1063        state->has_explicit_attrib_stream() &&
1064        block->default_layout.flags.q.out) {
1065       /* Assign global layout's stream value. */
1066       block->default_layout.flags.q.stream = 1;
1067       block->default_layout.flags.q.explicit_stream = 0;
1068       block->default_layout.stream = state->out_qualifier->stream;
1069    }
1070
1071    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1072       /* Assign global layout's xfb_buffer value. */
1073       block->default_layout.flags.q.xfb_buffer = 1;
1074       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1075       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1076    }
1077
1078    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1079       ast_type_qualifier& qualifier = member->type->qualifier;
1080       if ((qualifier.flags.i & interface_type_mask) == 0) {
1081          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1082           * "If no optional qualifier is used in a member declaration, the
1083           *  qualifier of the variable is just in, out, or uniform as declared
1084           *  by interface-qualifier."
1085           */
1086          qualifier.flags.i |= block_interface_qualifier;
1087       } else if ((qualifier.flags.i & interface_type_mask) !=
1088                  block_interface_qualifier) {
1089          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1090           * "If optional qualifiers are used, they can include interpolation
1091           *  and storage qualifiers and they must declare an input, output,
1092           *  or uniform variable consistent with the interface qualifier of
1093           *  the block."
1094           */
1095          _mesa_glsl_error(locp, state,
1096                           "uniform/in/out qualifier on "
1097                           "interface block member does not match "
1098                           "the interface block");
1099       }
1100
1101       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1102          _mesa_glsl_error(locp, state,
1103                           "invariant qualifiers can be used only "
1104                           "in interface block members for shader "
1105                           "inputs or outputs");
1106    }
1107 }
1108
1109 static void
1110 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1111 {
1112    if (q->is_subroutine_decl())
1113       printf("subroutine ");
1114
1115    if (q->subroutine_list) {
1116       printf("subroutine (");
1117       q->subroutine_list->print();
1118       printf(")");
1119    }
1120
1121    if (q->flags.q.constant)
1122       printf("const ");
1123
1124    if (q->flags.q.invariant)
1125       printf("invariant ");
1126
1127    if (q->flags.q.attribute)
1128       printf("attribute ");
1129
1130    if (q->flags.q.varying)
1131       printf("varying ");
1132
1133    if (q->flags.q.in && q->flags.q.out)
1134       printf("inout ");
1135    else {
1136       if (q->flags.q.in)
1137          printf("in ");
1138
1139       if (q->flags.q.out)
1140          printf("out ");
1141    }
1142
1143    if (q->flags.q.centroid)
1144       printf("centroid ");
1145    if (q->flags.q.sample)
1146       printf("sample ");
1147    if (q->flags.q.patch)
1148       printf("patch ");
1149    if (q->flags.q.uniform)
1150       printf("uniform ");
1151    if (q->flags.q.buffer)
1152       printf("buffer ");
1153    if (q->flags.q.smooth)
1154       printf("smooth ");
1155    if (q->flags.q.flat)
1156       printf("flat ");
1157    if (q->flags.q.noperspective)
1158       printf("noperspective ");
1159 }
1160
1161
1162 void
1163 ast_node::print(void) const
1164 {
1165    printf("unhandled node ");
1166 }
1167
1168
1169 ast_node::ast_node(void)
1170 {
1171    this->location.source = 0;
1172    this->location.first_line = 0;
1173    this->location.first_column = 0;
1174    this->location.last_line = 0;
1175    this->location.last_column = 0;
1176 }
1177
1178
1179 static void
1180 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1181 {
1182    if (array_specifier)
1183       array_specifier->print();
1184 }
1185
1186
1187 void
1188 ast_compound_statement::print(void) const
1189 {
1190    printf("{\n");
1191
1192    foreach_list_typed(ast_node, ast, link, &this->statements) {
1193       ast->print();
1194    }
1195
1196    printf("}\n");
1197 }
1198
1199
1200 ast_compound_statement::ast_compound_statement(int new_scope,
1201                                                ast_node *statements)
1202 {
1203    this->new_scope = new_scope;
1204
1205    if (statements != NULL) {
1206       this->statements.push_degenerate_list_at_head(&statements->link);
1207    }
1208 }
1209
1210
1211 void
1212 ast_expression::print(void) const
1213 {
1214    switch (oper) {
1215    case ast_assign:
1216    case ast_mul_assign:
1217    case ast_div_assign:
1218    case ast_mod_assign:
1219    case ast_add_assign:
1220    case ast_sub_assign:
1221    case ast_ls_assign:
1222    case ast_rs_assign:
1223    case ast_and_assign:
1224    case ast_xor_assign:
1225    case ast_or_assign:
1226       subexpressions[0]->print();
1227       printf("%s ", operator_string(oper));
1228       subexpressions[1]->print();
1229       break;
1230
1231    case ast_field_selection:
1232       subexpressions[0]->print();
1233       printf(". %s ", primary_expression.identifier);
1234       break;
1235
1236    case ast_plus:
1237    case ast_neg:
1238    case ast_bit_not:
1239    case ast_logic_not:
1240    case ast_pre_inc:
1241    case ast_pre_dec:
1242       printf("%s ", operator_string(oper));
1243       subexpressions[0]->print();
1244       break;
1245
1246    case ast_post_inc:
1247    case ast_post_dec:
1248       subexpressions[0]->print();
1249       printf("%s ", operator_string(oper));
1250       break;
1251
1252    case ast_conditional:
1253       subexpressions[0]->print();
1254       printf("? ");
1255       subexpressions[1]->print();
1256       printf(": ");
1257       subexpressions[2]->print();
1258       break;
1259
1260    case ast_array_index:
1261       subexpressions[0]->print();
1262       printf("[ ");
1263       subexpressions[1]->print();
1264       printf("] ");
1265       break;
1266
1267    case ast_function_call: {
1268       subexpressions[0]->print();
1269       printf("( ");
1270
1271       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1272          if (&ast->link != this->expressions.get_head())
1273             printf(", ");
1274
1275          ast->print();
1276       }
1277
1278       printf(") ");
1279       break;
1280    }
1281
1282    case ast_identifier:
1283       printf("%s ", primary_expression.identifier);
1284       break;
1285
1286    case ast_int_constant:
1287       printf("%d ", primary_expression.int_constant);
1288       break;
1289
1290    case ast_uint_constant:
1291       printf("%u ", primary_expression.uint_constant);
1292       break;
1293
1294    case ast_float_constant:
1295       printf("%f ", primary_expression.float_constant);
1296       break;
1297
1298    case ast_double_constant:
1299       printf("%f ", primary_expression.double_constant);
1300       break;
1301
1302    case ast_int64_constant:
1303       printf("%" PRId64 " ", primary_expression.int64_constant);
1304       break;
1305
1306    case ast_uint64_constant:
1307       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1308       break;
1309
1310    case ast_bool_constant:
1311       printf("%s ",
1312              primary_expression.bool_constant
1313              ? "true" : "false");
1314       break;
1315
1316    case ast_sequence: {
1317       printf("( ");
1318       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1319          if (&ast->link != this->expressions.get_head())
1320             printf(", ");
1321
1322          ast->print();
1323       }
1324       printf(") ");
1325       break;
1326    }
1327
1328    case ast_aggregate: {
1329       printf("{ ");
1330       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1331          if (&ast->link != this->expressions.get_head())
1332             printf(", ");
1333
1334          ast->print();
1335       }
1336       printf("} ");
1337       break;
1338    }
1339
1340    default:
1341       assert(0);
1342       break;
1343    }
1344 }
1345
1346 ast_expression::ast_expression(int oper,
1347                                ast_expression *ex0,
1348                                ast_expression *ex1,
1349                                ast_expression *ex2) :
1350    primary_expression()
1351 {
1352    this->oper = ast_operators(oper);
1353    this->subexpressions[0] = ex0;
1354    this->subexpressions[1] = ex1;
1355    this->subexpressions[2] = ex2;
1356    this->non_lvalue_description = NULL;
1357    this->is_lhs = false;
1358 }
1359
1360
1361 void
1362 ast_expression_statement::print(void) const
1363 {
1364    if (expression)
1365       expression->print();
1366
1367    printf("; ");
1368 }
1369
1370
1371 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1372    expression(ex)
1373 {
1374    /* empty */
1375 }
1376
1377
1378 void
1379 ast_function::print(void) const
1380 {
1381    return_type->print();
1382    printf(" %s (", identifier);
1383
1384    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1385       ast->print();
1386    }
1387
1388    printf(")");
1389 }
1390
1391
1392 ast_function::ast_function(void)
1393    : return_type(NULL), identifier(NULL), is_definition(false),
1394      signature(NULL)
1395 {
1396    /* empty */
1397 }
1398
1399
1400 void
1401 ast_fully_specified_type::print(void) const
1402 {
1403    _mesa_ast_type_qualifier_print(& qualifier);
1404    specifier->print();
1405 }
1406
1407
1408 void
1409 ast_parameter_declarator::print(void) const
1410 {
1411    type->print();
1412    if (identifier)
1413       printf("%s ", identifier);
1414    ast_opt_array_dimensions_print(array_specifier);
1415 }
1416
1417
1418 void
1419 ast_function_definition::print(void) const
1420 {
1421    prototype->print();
1422    body->print();
1423 }
1424
1425
1426 void
1427 ast_declaration::print(void) const
1428 {
1429    printf("%s ", identifier);
1430    ast_opt_array_dimensions_print(array_specifier);
1431
1432    if (initializer) {
1433       printf("= ");
1434       initializer->print();
1435    }
1436 }
1437
1438
1439 ast_declaration::ast_declaration(const char *identifier,
1440                                  ast_array_specifier *array_specifier,
1441                                  ast_expression *initializer)
1442 {
1443    this->identifier = identifier;
1444    this->array_specifier = array_specifier;
1445    this->initializer = initializer;
1446 }
1447
1448
1449 void
1450 ast_declarator_list::print(void) const
1451 {
1452    assert(type || invariant);
1453
1454    if (type)
1455       type->print();
1456    else if (invariant)
1457       printf("invariant ");
1458    else
1459       printf("precise ");
1460
1461    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1462       if (&ast->link != this->declarations.get_head())
1463          printf(", ");
1464
1465       ast->print();
1466    }
1467
1468    printf("; ");
1469 }
1470
1471
1472 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1473 {
1474    this->type = type;
1475    this->invariant = false;
1476    this->precise = false;
1477 }
1478
1479 void
1480 ast_jump_statement::print(void) const
1481 {
1482    switch (mode) {
1483    case ast_continue:
1484       printf("continue; ");
1485       break;
1486    case ast_break:
1487       printf("break; ");
1488       break;
1489    case ast_return:
1490       printf("return ");
1491       if (opt_return_value)
1492          opt_return_value->print();
1493
1494       printf("; ");
1495       break;
1496    case ast_discard:
1497       printf("discard; ");
1498       break;
1499    }
1500 }
1501
1502
1503 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1504    : opt_return_value(NULL)
1505 {
1506    this->mode = ast_jump_modes(mode);
1507
1508    if (mode == ast_return)
1509       opt_return_value = return_value;
1510 }
1511
1512
1513 void
1514 ast_selection_statement::print(void) const
1515 {
1516    printf("if ( ");
1517    condition->print();
1518    printf(") ");
1519
1520    then_statement->print();
1521
1522    if (else_statement) {
1523       printf("else ");
1524       else_statement->print();
1525    }
1526 }
1527
1528
1529 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1530                                                  ast_node *then_statement,
1531                                                  ast_node *else_statement)
1532 {
1533    this->condition = condition;
1534    this->then_statement = then_statement;
1535    this->else_statement = else_statement;
1536 }
1537
1538
1539 void
1540 ast_switch_statement::print(void) const
1541 {
1542    printf("switch ( ");
1543    test_expression->print();
1544    printf(") ");
1545
1546    body->print();
1547 }
1548
1549
1550 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1551                                            ast_node *body)
1552 {
1553    this->test_expression = test_expression;
1554    this->body = body;
1555 }
1556
1557
1558 void
1559 ast_switch_body::print(void) const
1560 {
1561    printf("{\n");
1562    if (stmts != NULL) {
1563       stmts->print();
1564    }
1565    printf("}\n");
1566 }
1567
1568
1569 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1570 {
1571    this->stmts = stmts;
1572 }
1573
1574
1575 void ast_case_label::print(void) const
1576 {
1577    if (test_value != NULL) {
1578       printf("case ");
1579       test_value->print();
1580       printf(": ");
1581    } else {
1582       printf("default: ");
1583    }
1584 }
1585
1586
1587 ast_case_label::ast_case_label(ast_expression *test_value)
1588 {
1589    this->test_value = test_value;
1590 }
1591
1592
1593 void ast_case_label_list::print(void) const
1594 {
1595    foreach_list_typed(ast_node, ast, link, & this->labels) {
1596       ast->print();
1597    }
1598    printf("\n");
1599 }
1600
1601
1602 ast_case_label_list::ast_case_label_list(void)
1603 {
1604 }
1605
1606
1607 void ast_case_statement::print(void) const
1608 {
1609    labels->print();
1610    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1611       ast->print();
1612       printf("\n");
1613    }
1614 }
1615
1616
1617 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1618 {
1619    this->labels = labels;
1620 }
1621
1622
1623 void ast_case_statement_list::print(void) const
1624 {
1625    foreach_list_typed(ast_node, ast, link, & this->cases) {
1626       ast->print();
1627    }
1628 }
1629
1630
1631 ast_case_statement_list::ast_case_statement_list(void)
1632 {
1633 }
1634
1635
1636 void
1637 ast_iteration_statement::print(void) const
1638 {
1639    switch (mode) {
1640    case ast_for:
1641       printf("for( ");
1642       if (init_statement)
1643          init_statement->print();
1644       printf("; ");
1645
1646       if (condition)
1647          condition->print();
1648       printf("; ");
1649
1650       if (rest_expression)
1651          rest_expression->print();
1652       printf(") ");
1653
1654       body->print();
1655       break;
1656
1657    case ast_while:
1658       printf("while ( ");
1659       if (condition)
1660          condition->print();
1661       printf(") ");
1662       body->print();
1663       break;
1664
1665    case ast_do_while:
1666       printf("do ");
1667       body->print();
1668       printf("while ( ");
1669       if (condition)
1670          condition->print();
1671       printf("); ");
1672       break;
1673    }
1674 }
1675
1676
1677 ast_iteration_statement::ast_iteration_statement(int mode,
1678                                                  ast_node *init,
1679                                                  ast_node *condition,
1680                                                  ast_expression *rest_expression,
1681                                                  ast_node *body)
1682 {
1683    this->mode = ast_iteration_modes(mode);
1684    this->init_statement = init;
1685    this->condition = condition;
1686    this->rest_expression = rest_expression;
1687    this->body = body;
1688 }
1689
1690
1691 void
1692 ast_struct_specifier::print(void) const
1693 {
1694    printf("struct %s { ", name);
1695    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1696       ast->print();
1697    }
1698    printf("} ");
1699 }
1700
1701
1702 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1703                                            ast_declarator_list *declarator_list)
1704    : name(identifier), layout(NULL), declarations(), is_declaration(true),
1705      type(NULL)
1706 {
1707    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1708 }
1709
1710 void ast_subroutine_list::print(void) const
1711 {
1712    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1713       if (&ast->link != this->declarations.get_head())
1714          printf(", ");
1715       ast->print();
1716    }
1717 }
1718
1719 static void
1720 set_shader_inout_layout(struct gl_shader *shader,
1721                      struct _mesa_glsl_parse_state *state)
1722 {
1723    /* Should have been prevented by the parser. */
1724    if (shader->Stage != MESA_SHADER_GEOMETRY &&
1725        shader->Stage != MESA_SHADER_TESS_EVAL &&
1726        shader->Stage != MESA_SHADER_COMPUTE) {
1727       assert(!state->in_qualifier->flags.i);
1728    }
1729
1730    if (shader->Stage != MESA_SHADER_COMPUTE) {
1731       /* Should have been prevented by the parser. */
1732       assert(!state->cs_input_local_size_specified);
1733       assert(!state->cs_input_local_size_variable_specified);
1734       assert(state->cs_derivative_group == DERIVATIVE_GROUP_NONE);
1735    }
1736
1737    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1738       /* Should have been prevented by the parser. */
1739       assert(!state->fs_uses_gl_fragcoord);
1740       assert(!state->fs_redeclares_gl_fragcoord);
1741       assert(!state->fs_pixel_center_integer);
1742       assert(!state->fs_origin_upper_left);
1743       assert(!state->fs_early_fragment_tests);
1744       assert(!state->fs_inner_coverage);
1745       assert(!state->fs_post_depth_coverage);
1746       assert(!state->fs_pixel_interlock_ordered);
1747       assert(!state->fs_pixel_interlock_unordered);
1748       assert(!state->fs_sample_interlock_ordered);
1749       assert(!state->fs_sample_interlock_unordered);
1750    }
1751
1752    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1753       if (state->out_qualifier->out_xfb_stride[i]) {
1754          unsigned xfb_stride;
1755          if (state->out_qualifier->out_xfb_stride[i]->
1756                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1757                 true)) {
1758             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1759          }
1760       }
1761    }
1762
1763    switch (shader->Stage) {
1764    case MESA_SHADER_TESS_CTRL:
1765       shader->info.TessCtrl.VerticesOut = 0;
1766       if (state->tcs_output_vertices_specified) {
1767          unsigned vertices;
1768          if (state->out_qualifier->vertices->
1769                process_qualifier_constant(state, "vertices", &vertices,
1770                                           false)) {
1771
1772             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1773             if (vertices > state->Const.MaxPatchVertices) {
1774                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1775                                 "GL_MAX_PATCH_VERTICES", vertices);
1776             }
1777             shader->info.TessCtrl.VerticesOut = vertices;
1778          }
1779       }
1780       break;
1781    case MESA_SHADER_TESS_EVAL:
1782       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1783       if (state->in_qualifier->flags.q.prim_type)
1784          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1785
1786       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1787       if (state->in_qualifier->flags.q.vertex_spacing)
1788          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1789
1790       shader->info.TessEval.VertexOrder = 0;
1791       if (state->in_qualifier->flags.q.ordering)
1792          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1793
1794       shader->info.TessEval.PointMode = -1;
1795       if (state->in_qualifier->flags.q.point_mode)
1796          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1797       break;
1798    case MESA_SHADER_GEOMETRY:
1799       shader->info.Geom.VerticesOut = -1;
1800       if (state->out_qualifier->flags.q.max_vertices) {
1801          unsigned qual_max_vertices;
1802          if (state->out_qualifier->max_vertices->
1803                process_qualifier_constant(state, "max_vertices",
1804                                           &qual_max_vertices, true)) {
1805
1806             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1807                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1808                _mesa_glsl_error(&loc, state,
1809                                 "maximum output vertices (%d) exceeds "
1810                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1811                                 qual_max_vertices);
1812             }
1813             shader->info.Geom.VerticesOut = qual_max_vertices;
1814          }
1815       }
1816
1817       if (state->gs_input_prim_type_specified) {
1818          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1819       } else {
1820          shader->info.Geom.InputType = PRIM_UNKNOWN;
1821       }
1822
1823       if (state->out_qualifier->flags.q.prim_type) {
1824          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1825       } else {
1826          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1827       }
1828
1829       shader->info.Geom.Invocations = 0;
1830       if (state->in_qualifier->flags.q.invocations) {
1831          unsigned invocations;
1832          if (state->in_qualifier->invocations->
1833                process_qualifier_constant(state, "invocations",
1834                                           &invocations, false)) {
1835
1836             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1837             if (invocations > state->Const.MaxGeometryShaderInvocations) {
1838                _mesa_glsl_error(&loc, state,
1839                                 "invocations (%d) exceeds "
1840                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1841                                 invocations);
1842             }
1843             shader->info.Geom.Invocations = invocations;
1844          }
1845       }
1846       break;
1847
1848    case MESA_SHADER_COMPUTE:
1849       if (state->cs_input_local_size_specified) {
1850          for (int i = 0; i < 3; i++)
1851             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1852       } else {
1853          for (int i = 0; i < 3; i++)
1854             shader->info.Comp.LocalSize[i] = 0;
1855       }
1856
1857       shader->info.Comp.LocalSizeVariable =
1858          state->cs_input_local_size_variable_specified;
1859
1860       shader->info.Comp.DerivativeGroup = state->cs_derivative_group;
1861
1862       if (state->NV_compute_shader_derivatives_enable) {
1863          /* We allow multiple cs_input_layout nodes, but do not store them in
1864           * a convenient place, so for now live with an empty location error.
1865           */
1866          YYLTYPE loc = {0};
1867          if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_QUADS) {
1868             if (shader->info.Comp.LocalSize[0] % 2 != 0) {
1869                _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1870                                 "local group size whose first dimension "
1871                                 "is a multiple of 2\n");
1872             }
1873             if (shader->info.Comp.LocalSize[1] % 2 != 0) {
1874                _mesa_glsl_error(&loc, state, "derivative_group_quadsNV must be used with a "
1875                                 "local group size whose second dimension "
1876                                 "is a multiple of 2\n");
1877             }
1878          } else if (shader->info.Comp.DerivativeGroup == DERIVATIVE_GROUP_LINEAR) {
1879             if ((shader->info.Comp.LocalSize[0] *
1880                  shader->info.Comp.LocalSize[1] *
1881                  shader->info.Comp.LocalSize[2]) % 4 != 0) {
1882                _mesa_glsl_error(&loc, state, "derivative_group_linearNV must be used with a "
1883                             "local group size whose total number of invocations "
1884                             "is a multiple of 4\n");
1885             }
1886          }
1887       }
1888
1889       break;
1890
1891    case MESA_SHADER_FRAGMENT:
1892       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1893       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1894       shader->pixel_center_integer = state->fs_pixel_center_integer;
1895       shader->origin_upper_left = state->fs_origin_upper_left;
1896       shader->ARB_fragment_coord_conventions_enable =
1897          state->ARB_fragment_coord_conventions_enable;
1898       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1899       shader->InnerCoverage = state->fs_inner_coverage;
1900       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1901       shader->PixelInterlockOrdered = state->fs_pixel_interlock_ordered;
1902       shader->PixelInterlockUnordered = state->fs_pixel_interlock_unordered;
1903       shader->SampleInterlockOrdered = state->fs_sample_interlock_ordered;
1904       shader->SampleInterlockUnordered = state->fs_sample_interlock_unordered;
1905       shader->BlendSupport = state->fs_blend_support;
1906       break;
1907
1908    default:
1909       /* Nothing to do. */
1910       break;
1911    }
1912
1913    shader->bindless_sampler = state->bindless_sampler_specified;
1914    shader->bindless_image = state->bindless_image_specified;
1915    shader->bound_sampler = state->bound_sampler_specified;
1916    shader->bound_image = state->bound_image_specified;
1917 }
1918
1919 /* src can be NULL if only the symbols found in the exec_list should be
1920  * copied
1921  */
1922 void
1923 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1924                                    struct glsl_symbol_table *src,
1925                                    struct glsl_symbol_table *dest)
1926 {
1927    foreach_in_list (ir_instruction, ir, shader_ir) {
1928       switch (ir->ir_type) {
1929       case ir_type_function:
1930          dest->add_function((ir_function *) ir);
1931          break;
1932       case ir_type_variable: {
1933          ir_variable *const var = (ir_variable *) ir;
1934
1935          if (var->data.mode != ir_var_temporary)
1936             dest->add_variable(var);
1937          break;
1938       }
1939       default:
1940          break;
1941       }
1942    }
1943
1944    if (src != NULL) {
1945       /* Explicitly copy the gl_PerVertex interface definitions because these
1946        * are needed to check they are the same during the interstage link.
1947        * They can’t necessarily be found via the exec_list because the members
1948        * might not be referenced. The GL spec still requires that they match
1949        * in that case.
1950        */
1951       const glsl_type *iface =
1952          src->get_interface("gl_PerVertex", ir_var_shader_in);
1953       if (iface)
1954          dest->add_interface(iface->name, iface, ir_var_shader_in);
1955
1956       iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1957       if (iface)
1958          dest->add_interface(iface->name, iface, ir_var_shader_out);
1959    }
1960 }
1961
1962 extern "C" {
1963
1964 static void
1965 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1966 {
1967    int j, k;
1968    int index = 0;
1969
1970    for (j = 0; j < state->num_subroutines; j++) {
1971       while (state->subroutines[j]->subroutine_index == -1) {
1972          for (k = 0; k < state->num_subroutines; k++) {
1973             if (state->subroutines[k]->subroutine_index == index)
1974                break;
1975             else if (k == state->num_subroutines - 1) {
1976                state->subroutines[j]->subroutine_index = index;
1977             }
1978          }
1979          index++;
1980       }
1981    }
1982 }
1983
1984 static void
1985 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1986                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1987                     struct glcpp_parser *data,
1988                     unsigned version,
1989                     bool es)
1990 {
1991    unsigned gl_version = state->ctx->Extensions.Version;
1992    gl_api api = state->ctx->API;
1993
1994    if (gl_version != 0xff) {
1995       unsigned i;
1996       for (i = 0; i < state->num_supported_versions; i++) {
1997          if (state->supported_versions[i].ver == version &&
1998              state->supported_versions[i].es == es) {
1999             gl_version = state->supported_versions[i].gl_ver;
2000             break;
2001          }
2002       }
2003
2004       if (i == state->num_supported_versions)
2005          return;
2006    }
2007
2008    if (es)
2009       api = API_OPENGLES2;
2010
2011    for (unsigned i = 0;
2012         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
2013       const _mesa_glsl_extension *extension
2014          = &_mesa_glsl_supported_extensions[i];
2015       if (extension->compatible_with_state(state, api, gl_version)) {
2016          add_builtin_define(data, extension->name, 1);
2017       }
2018    }
2019 }
2020
2021 /* Implements parsing checks that we can't do during parsing */
2022 static void
2023 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
2024 {
2025    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
2026       YYLTYPE loc;
2027       memset(&loc, 0, sizeof(loc));
2028       _mesa_glsl_error(&loc, state, "Compute shaders require "
2029                        "GLSL 4.30 or GLSL ES 3.10");
2030    }
2031 }
2032
2033 static void
2034 opt_shader_and_create_symbol_table(struct gl_context *ctx,
2035                                    struct glsl_symbol_table *source_symbols,
2036                                    struct gl_shader *shader)
2037 {
2038    assert(shader->CompileStatus != COMPILE_FAILURE &&
2039           !shader->ir->is_empty());
2040
2041    struct gl_shader_compiler_options *options =
2042       &ctx->Const.ShaderCompilerOptions[shader->Stage];
2043
2044    /* Do some optimization at compile time to reduce shader IR size
2045     * and reduce later work if the same shader is linked multiple times
2046     */
2047    if (ctx->Const.GLSLOptimizeConservatively) {
2048       /* Run it just once. */
2049       do_common_optimization(shader->ir, false, false, options,
2050                              ctx->Const.NativeIntegers);
2051    } else {
2052       /* Repeat it until it stops making changes. */
2053       while (do_common_optimization(shader->ir, false, false, options,
2054                                     ctx->Const.NativeIntegers))
2055          ;
2056    }
2057
2058    validate_ir_tree(shader->ir);
2059
2060    enum ir_variable_mode other;
2061    switch (shader->Stage) {
2062    case MESA_SHADER_VERTEX:
2063       other = ir_var_shader_in;
2064       break;
2065    case MESA_SHADER_FRAGMENT:
2066       other = ir_var_shader_out;
2067       break;
2068    default:
2069       /* Something invalid to ensure optimize_dead_builtin_uniforms
2070        * doesn't remove anything other than uniforms or constants.
2071        */
2072       other = ir_var_mode_count;
2073       break;
2074    }
2075
2076    optimize_dead_builtin_variables(shader->ir, other);
2077
2078    validate_ir_tree(shader->ir);
2079
2080    /* Retain any live IR, but trash the rest. */
2081    reparent_ir(shader->ir, shader->ir);
2082
2083    /* Destroy the symbol table.  Create a new symbol table that contains only
2084     * the variables and functions that still exist in the IR.  The symbol
2085     * table will be used later during linking.
2086     *
2087     * There must NOT be any freed objects still referenced by the symbol
2088     * table.  That could cause the linker to dereference freed memory.
2089     *
2090     * We don't have to worry about types or interface-types here because those
2091     * are fly-weights that are looked up by glsl_type.
2092     */
2093    _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2094                                       shader->symbols);
2095 }
2096
2097 void
2098 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2099                           bool dump_ast, bool dump_hir, bool force_recompile)
2100 {
2101    const char *source = force_recompile && shader->FallbackSource ?
2102       shader->FallbackSource : shader->Source;
2103
2104    if (!force_recompile) {
2105       if (ctx->Cache) {
2106          char buf[41];
2107          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2108                                 shader->sha1);
2109          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2110             /* We've seen this shader before and know it compiles */
2111             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2112                _mesa_sha1_format(buf, shader->sha1);
2113                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2114             }
2115             shader->CompileStatus = COMPILE_SKIPPED;
2116
2117             free((void *)shader->FallbackSource);
2118             shader->FallbackSource = NULL;
2119             return;
2120          }
2121       }
2122    } else {
2123       /* We should only ever end up here if a re-compile has been forced by a
2124        * shader cache miss. In which case we can skip the compile if its
2125        * already be done by a previous fallback or the initial compile call.
2126        */
2127       if (shader->CompileStatus == COMPILE_SUCCESS)
2128          return;
2129    }
2130
2131    struct _mesa_glsl_parse_state *state =
2132       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2133
2134    if (ctx->Const.GenerateTemporaryNames)
2135       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2136                               false, true);
2137
2138    state->error = glcpp_preprocess(state, &source, &state->info_log,
2139                                    add_builtin_defines, state, ctx);
2140
2141    if (!state->error) {
2142      _mesa_glsl_lexer_ctor(state, source);
2143      _mesa_glsl_parse(state);
2144      _mesa_glsl_lexer_dtor(state);
2145      do_late_parsing_checks(state);
2146    }
2147
2148    if (dump_ast) {
2149       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2150          ast->print();
2151       }
2152       printf("\n\n");
2153    }
2154
2155    ralloc_free(shader->ir);
2156    shader->ir = new(shader) exec_list;
2157    if (!state->error && !state->translation_unit.is_empty())
2158       _mesa_ast_to_hir(shader->ir, state);
2159
2160    if (!state->error) {
2161       validate_ir_tree(shader->ir);
2162
2163       /* Print out the unoptimized IR. */
2164       if (dump_hir) {
2165          _mesa_print_ir(stdout, shader->ir, state);
2166       }
2167    }
2168
2169    if (shader->InfoLog)
2170       ralloc_free(shader->InfoLog);
2171
2172    if (!state->error)
2173       set_shader_inout_layout(shader, state);
2174
2175    shader->symbols = new(shader->ir) glsl_symbol_table;
2176    shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2177    shader->InfoLog = state->info_log;
2178    shader->Version = state->language_version;
2179    shader->IsES = state->es_shader;
2180
2181    if (!state->error && !shader->ir->is_empty()) {
2182       assign_subroutine_indexes(state);
2183       lower_subroutine(shader->ir, state);
2184       opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2185    }
2186
2187    if (!force_recompile) {
2188       free((void *)shader->FallbackSource);
2189       shader->FallbackSource = NULL;
2190    }
2191
2192    delete state->symbols;
2193    ralloc_free(state);
2194
2195    if (ctx->Cache && shader->CompileStatus == COMPILE_SUCCESS) {
2196       char sha1_buf[41];
2197       disk_cache_put_key(ctx->Cache, shader->sha1);
2198       if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2199          _mesa_sha1_format(sha1_buf, shader->sha1);
2200          fprintf(stderr, "marking shader: %s\n", sha1_buf);
2201       }
2202    }
2203 }
2204
2205 } /* extern "C" */
2206 /**
2207  * Do the set of common optimizations passes
2208  *
2209  * \param ir                          List of instructions to be optimized
2210  * \param linked                      Is the shader linked?  This enables
2211  *                                    optimizations passes that remove code at
2212  *                                    global scope and could cause linking to
2213  *                                    fail.
2214  * \param uniform_locations_assigned  Have locations already been assigned for
2215  *                                    uniforms?  This prevents the declarations
2216  *                                    of unused uniforms from being removed.
2217  *                                    The setting of this flag only matters if
2218  *                                    \c linked is \c true.
2219  * \param options                     The driver's preferred shader options.
2220  * \param native_integers             Selects optimizations that depend on the
2221  *                                    implementations supporting integers
2222  *                                    natively (as opposed to supporting
2223  *                                    integers in floating point registers).
2224  */
2225 bool
2226 do_common_optimization(exec_list *ir, bool linked,
2227                        bool uniform_locations_assigned,
2228                        const struct gl_shader_compiler_options *options,
2229                        bool native_integers)
2230 {
2231    const bool debug = false;
2232    bool progress = false;
2233
2234 #define OPT(PASS, ...) do {                                             \
2235       if (debug) {                                                      \
2236          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2237          const bool opt_progress = PASS(__VA_ARGS__);                   \
2238          progress = opt_progress || progress;                           \
2239          if (opt_progress)                                              \
2240             _mesa_print_ir(stderr, ir, NULL);                           \
2241          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2242                  #PASS, opt_progress ? "made" : "no");                  \
2243       } else {                                                          \
2244          progress = PASS(__VA_ARGS__) || progress;                      \
2245       }                                                                 \
2246    } while (false)
2247
2248    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2249
2250    if (linked) {
2251       OPT(do_function_inlining, ir);
2252       OPT(do_dead_functions, ir);
2253       OPT(do_structure_splitting, ir);
2254    }
2255    propagate_invariance(ir);
2256    OPT(do_if_simplification, ir);
2257    OPT(opt_flatten_nested_if_blocks, ir);
2258    OPT(opt_conditional_discard, ir);
2259    OPT(do_copy_propagation_elements, ir);
2260
2261    if (options->OptimizeForAOS && !linked)
2262       OPT(opt_flip_matrices, ir);
2263
2264    if (linked && options->OptimizeForAOS) {
2265       OPT(do_vectorize, ir);
2266    }
2267
2268    if (linked)
2269       OPT(do_dead_code, ir, uniform_locations_assigned);
2270    else
2271       OPT(do_dead_code_unlinked, ir);
2272    OPT(do_dead_code_local, ir);
2273    OPT(do_tree_grafting, ir);
2274    OPT(do_constant_propagation, ir);
2275    if (linked)
2276       OPT(do_constant_variable, ir);
2277    else
2278       OPT(do_constant_variable_unlinked, ir);
2279    OPT(do_constant_folding, ir);
2280    OPT(do_minmax_prune, ir);
2281    OPT(do_rebalance_tree, ir);
2282    OPT(do_algebraic, ir, native_integers, options);
2283    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2284        options->EmitNoCont, options->EmitNoLoops);
2285    OPT(do_vec_index_to_swizzle, ir);
2286    OPT(lower_vector_insert, ir, false);
2287    OPT(optimize_swizzles, ir);
2288
2289    OPT(optimize_split_arrays, ir, linked);
2290    OPT(optimize_redundant_jumps, ir);
2291
2292    if (options->MaxUnrollIterations) {
2293       loop_state *ls = analyze_loop_variables(ir);
2294       if (ls->loop_found) {
2295          bool loop_progress = unroll_loops(ir, ls, options);
2296          while (loop_progress) {
2297             loop_progress = false;
2298             loop_progress |= do_constant_propagation(ir);
2299             loop_progress |= do_if_simplification(ir);
2300
2301             /* Some drivers only call do_common_optimization() once rather
2302              * than in a loop. So we must call do_lower_jumps() after
2303              * unrolling a loop because for drivers that use LLVM validation
2304              * will fail if a jump is not the last instruction in the block.
2305              * For example the following will fail LLVM validation:
2306              *
2307              *   (loop (
2308              *      ...
2309              *   break
2310              *   (assign  (x) (var_ref v124)  (expression int + (var_ref v124)
2311              *      (constant int (1)) ) )
2312              *   ))
2313              */
2314             loop_progress |= do_lower_jumps(ir, true, true,
2315                                             options->EmitNoMainReturn,
2316                                             options->EmitNoCont,
2317                                             options->EmitNoLoops);
2318          }
2319          progress |= loop_progress;
2320       }
2321       delete ls;
2322    }
2323
2324 #undef OPT
2325
2326    return progress;
2327 }
2328
2329 extern "C" {
2330
2331 /**
2332  * To be called at GL context ctor.
2333  */
2334 void
2335 _mesa_init_shader_compiler_types(void)
2336 {
2337    glsl_type_singleton_init_or_ref();
2338 }
2339
2340 /**
2341  * To be called at GL context dtor.
2342  */
2343 void
2344 _mesa_destroy_shader_compiler_types(void)
2345 {
2346    glsl_type_singleton_decref();
2347 }
2348
2349 /**
2350  * To be called at GL teardown time, this frees compiler datastructures.
2351  *
2352  * After calling this, any previously compiled shaders and shader
2353  * programs would be invalid.  So this should happen at approximately
2354  * program exit.
2355  */
2356 void
2357 _mesa_destroy_shader_compiler(void)
2358 {
2359    _mesa_destroy_shader_compiler_caches();
2360 }
2361
2362 /**
2363  * Releases compiler caches to trade off performance for memory.
2364  *
2365  * Intended to be used with glReleaseShaderCompiler().
2366  */
2367 void
2368 _mesa_destroy_shader_compiler_caches(void)
2369 {
2370    _mesa_glsl_release_builtin_functions();
2371 }
2372
2373 }