src/compiler/glsl/glsl_parser_extras.cpp

   1 /*
   2  * Copyright © 2008, 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23 #include <inttypes.h> /* for PRIx64 macro */
  24 #include <stdio.h>
  25 #include <stdarg.h>
  26 #include <string.h>
  27 #include <assert.h>
  28
  29 #include "main/core.h" /* for struct gl_context */
  30 #include "main/context.h"
  31 #include "main/debug_output.h"
  32 #include "main/formats.h"
  33 #include "main/shaderobj.h"
  34 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
  35 #include "util/ralloc.h"
  36 #include "util/disk_cache.h"
  37 #include "util/mesa-sha1.h"
  38 #include "ast.h"
  39 #include "glsl_parser_extras.h"
  40 #include "glsl_parser.h"
  41 #include "ir_optimization.h"
  42 #include "loop_analysis.h"
  43 #include "builtin_functions.h"
  44
  45 /**
  46  * Format a short human-readable description of the given GLSL version.
  47  */
  48 const char *
  49 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
  50 {
  51    return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
  52                           version / 100, version % 100);
  53 }
  54
  55
  56 static const unsigned known_desktop_glsl_versions[] =
  57    { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450 };
  58 static const unsigned known_desktop_gl_versions[] =
  59    {  20,  21,  30,  31,  32,  33,  40,  41,  42,  43,  44,  45 };
  60
  61
  62 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
  63                                                gl_shader_stage stage,
  64                                                void *mem_ctx)
  65    : ctx(_ctx), cs_input_local_size_specified(false), cs_input_local_size(),
  66      switch_state()
  67 {
  68    assert(stage < MESA_SHADER_STAGES);
  69    this->stage = stage;
  70
  71    this->scanner = NULL;
  72    this->translation_unit.make_empty();
  73    this->symbols = new(mem_ctx) glsl_symbol_table;
  74
  75    this->linalloc = linear_alloc_parent(this, 0);
  76
  77    this->info_log = ralloc_strdup(mem_ctx, "");
  78    this->error = false;
  79    this->loop_nesting_ast = NULL;
  80
  81    this->uses_builtin_functions = false;
  82
  83    /* Set default language version and extensions */
  84    this->language_version = 110;
  85    this->forced_language_version = ctx->Const.ForceGLSLVersion;
  86    this->zero_init = ctx->Const.GLSLZeroInit;
  87    this->gl_version = 20;
  88    this->compat_shader = true;
  89    this->es_shader = false;
  90    this->ARB_texture_rectangle_enable = true;
  91
  92    /* OpenGL ES 2.0 has different defaults from desktop GL. */
  93    if (ctx->API == API_OPENGLES2) {
  94       this->language_version = 100;
  95       this->es_shader = true;
  96       this->ARB_texture_rectangle_enable = false;
  97    }
  98
  99    this->extensions = &ctx->Extensions;
 100
 101    this->Const.MaxLights = ctx->Const.MaxLights;
 102    this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
 103    this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
 104    this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
 105    this->Const.MaxVertexAttribs = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs;
 106    this->Const.MaxVertexUniformComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxUniformComponents;
 107    this->Const.MaxVertexTextureImageUnits = ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits;
 108    this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
 109    this->Const.MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
 110    this->Const.MaxFragmentUniformComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxUniformComponents;
 111    this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset;
 112    this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset;
 113
 114    this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
 115
 116    this->Const.MaxDualSourceDrawBuffers = ctx->Const.MaxDualSourceDrawBuffers;
 117
 118    /* 1.50 constants */
 119    this->Const.MaxVertexOutputComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents;
 120    this->Const.MaxGeometryInputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxInputComponents;
 121    this->Const.MaxGeometryOutputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxOutputComponents;
 122    this->Const.MaxFragmentInputComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents;
 123    this->Const.MaxGeometryTextureImageUnits = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits;
 124    this->Const.MaxGeometryOutputVertices = ctx->Const.MaxGeometryOutputVertices;
 125    this->Const.MaxGeometryTotalOutputComponents = ctx->Const.MaxGeometryTotalOutputComponents;
 126    this->Const.MaxGeometryUniformComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxUniformComponents;
 127
 128    this->Const.MaxVertexAtomicCounters = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicCounters;
 129    this->Const.MaxTessControlAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters;
 130    this->Const.MaxTessEvaluationAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicCounters;
 131    this->Const.MaxGeometryAtomicCounters = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicCounters;
 132    this->Const.MaxFragmentAtomicCounters = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
 133    this->Const.MaxComputeAtomicCounters = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicCounters;
 134    this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
 135    this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
 136    this->Const.MaxVertexAtomicCounterBuffers =
 137       ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicBuffers;
 138    this->Const.MaxTessControlAtomicCounterBuffers =
 139       ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers;
 140    this->Const.MaxTessEvaluationAtomicCounterBuffers =
 141       ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers;
 142    this->Const.MaxGeometryAtomicCounterBuffers =
 143       ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers;
 144    this->Const.MaxFragmentAtomicCounterBuffers =
 145       ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
 146    this->Const.MaxComputeAtomicCounterBuffers =
 147       ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers;
 148    this->Const.MaxCombinedAtomicCounterBuffers =
 149       ctx->Const.MaxCombinedAtomicBuffers;
 150    this->Const.MaxAtomicCounterBufferSize =
 151       ctx->Const.MaxAtomicBufferSize;
 152
 153    /* ARB_enhanced_layouts constants */
 154    this->Const.MaxTransformFeedbackBuffers = ctx->Const.MaxTransformFeedbackBuffers;
 155    this->Const.MaxTransformFeedbackInterleavedComponents = ctx->Const.MaxTransformFeedbackInterleavedComponents;
 156
 157    /* Compute shader constants */
 158    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupCount); i++)
 159       this->Const.MaxComputeWorkGroupCount[i] = ctx->Const.MaxComputeWorkGroupCount[i];
 160    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupSize); i++)
 161       this->Const.MaxComputeWorkGroupSize[i] = ctx->Const.MaxComputeWorkGroupSize[i];
 162
 163    this->Const.MaxComputeTextureImageUnits = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
 164    this->Const.MaxComputeUniformComponents = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxUniformComponents;
 165
 166    this->Const.MaxImageUnits = ctx->Const.MaxImageUnits;
 167    this->Const.MaxCombinedShaderOutputResources = ctx->Const.MaxCombinedShaderOutputResources;
 168    this->Const.MaxImageSamples = ctx->Const.MaxImageSamples;
 169    this->Const.MaxVertexImageUniforms = ctx->Const.Program[MESA_SHADER_VERTEX].MaxImageUniforms;
 170    this->Const.MaxTessControlImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms;
 171    this->Const.MaxTessEvaluationImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms;
 172    this->Const.MaxGeometryImageUniforms = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxImageUniforms;
 173    this->Const.MaxFragmentImageUniforms = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxImageUniforms;
 174    this->Const.MaxComputeImageUniforms = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
 175    this->Const.MaxCombinedImageUniforms = ctx->Const.MaxCombinedImageUniforms;
 176
 177    /* ARB_viewport_array */
 178    this->Const.MaxViewports = ctx->Const.MaxViewports;
 179
 180    /* tessellation shader constants */
 181    this->Const.MaxPatchVertices = ctx->Const.MaxPatchVertices;
 182    this->Const.MaxTessGenLevel = ctx->Const.MaxTessGenLevel;
 183    this->Const.MaxTessControlInputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents;
 184    this->Const.MaxTessControlOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents;
 185    this->Const.MaxTessControlTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits;
 186    this->Const.MaxTessEvaluationInputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents;
 187    this->Const.MaxTessEvaluationOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents;
 188    this->Const.MaxTessEvaluationTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits;
 189    this->Const.MaxTessPatchComponents = ctx->Const.MaxTessPatchComponents;
 190    this->Const.MaxTessControlTotalOutputComponents = ctx->Const.MaxTessControlTotalOutputComponents;
 191    this->Const.MaxTessControlUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents;
 192    this->Const.MaxTessEvaluationUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents;
 193
 194    /* GL 4.5 / OES_sample_variables */
 195    this->Const.MaxSamples = ctx->Const.MaxSamples;
 196
 197    this->current_function = NULL;
 198    this->toplevel_ir = NULL;
 199    this->found_return = false;
 200    this->all_invariant = false;
 201    this->user_structures = NULL;
 202    this->num_user_structures = 0;
 203    this->num_subroutines = 0;
 204    this->subroutines = NULL;
 205    this->num_subroutine_types = 0;
 206    this->subroutine_types = NULL;
 207
 208    /* supported_versions should be large enough to support the known desktop
 209     * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
 210     */
 211    STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 4) ==
 212                  ARRAY_SIZE(this->supported_versions));
 213
 214    /* Populate the list of supported GLSL versions */
 215    /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
 216     * the OpenGL 3.2 Core context is supported, this logic will need
 217     * change.  Older versions of GLSL are no longer supported
 218     * outside the compatibility contexts of 3.x.
 219     */
 220    this->num_supported_versions = 0;
 221    if (_mesa_is_desktop_gl(ctx)) {
 222       for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
 223          if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
 224             this->supported_versions[this->num_supported_versions].ver
 225                = known_desktop_glsl_versions[i];
 226             this->supported_versions[this->num_supported_versions].gl_ver
 227                = known_desktop_gl_versions[i];
 228             this->supported_versions[this->num_supported_versions].es = false;
 229             this->num_supported_versions++;
 230          }
 231       }
 232    }
 233    if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
 234       this->supported_versions[this->num_supported_versions].ver = 100;
 235       this->supported_versions[this->num_supported_versions].gl_ver = 20;
 236       this->supported_versions[this->num_supported_versions].es = true;
 237       this->num_supported_versions++;
 238    }
 239    if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
 240       this->supported_versions[this->num_supported_versions].ver = 300;
 241       this->supported_versions[this->num_supported_versions].gl_ver = 30;
 242       this->supported_versions[this->num_supported_versions].es = true;
 243       this->num_supported_versions++;
 244    }
 245    if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
 246       this->supported_versions[this->num_supported_versions].ver = 310;
 247       this->supported_versions[this->num_supported_versions].gl_ver = 31;
 248       this->supported_versions[this->num_supported_versions].es = true;
 249       this->num_supported_versions++;
 250    }
 251    if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
 252        ctx->Extensions.ARB_ES3_2_compatibility) {
 253       this->supported_versions[this->num_supported_versions].ver = 320;
 254       this->supported_versions[this->num_supported_versions].gl_ver = 32;
 255       this->supported_versions[this->num_supported_versions].es = true;
 256       this->num_supported_versions++;
 257    }
 258
 259    /* Create a string for use in error messages to tell the user which GLSL
 260     * versions are supported.
 261     */
 262    char *supported = ralloc_strdup(this, "");
 263    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 264       unsigned ver = this->supported_versions[i].ver;
 265       const char *const prefix = (i == 0)
 266          ? ""
 267          : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
 268       const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
 269
 270       ralloc_asprintf_append(& supported, "%s%u.%02u%s",
 271                              prefix,
 272                              ver / 100, ver % 100,
 273                              suffix);
 274    }
 275
 276    this->supported_version_string = supported;
 277
 278    if (ctx->Const.ForceGLSLExtensionsWarn)
 279       _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
 280
 281    this->default_uniform_qualifier = new(this) ast_type_qualifier();
 282    this->default_uniform_qualifier->flags.q.shared = 1;
 283    this->default_uniform_qualifier->flags.q.column_major = 1;
 284
 285    this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
 286    this->default_shader_storage_qualifier->flags.q.shared = 1;
 287    this->default_shader_storage_qualifier->flags.q.column_major = 1;
 288
 289    this->fs_uses_gl_fragcoord = false;
 290    this->fs_redeclares_gl_fragcoord = false;
 291    this->fs_origin_upper_left = false;
 292    this->fs_pixel_center_integer = false;
 293    this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
 294
 295    this->gs_input_prim_type_specified = false;
 296    this->tcs_output_vertices_specified = false;
 297    this->gs_input_size = 0;
 298    this->in_qualifier = new(this) ast_type_qualifier();
 299    this->out_qualifier = new(this) ast_type_qualifier();
 300    this->fs_early_fragment_tests = false;
 301    this->fs_inner_coverage = false;
 302    this->fs_post_depth_coverage = false;
 303    this->fs_blend_support = 0;
 304    memset(this->atomic_counter_offsets, 0,
 305           sizeof(this->atomic_counter_offsets));
 306    this->allow_extension_directive_midshader =
 307       ctx->Const.AllowGLSLExtensionDirectiveMidShader;
 308
 309    this->cs_input_local_size_variable_specified = false;
 310
 311    /* ARB_bindless_texture */
 312    this->bindless_sampler_specified = false;
 313    this->bindless_image_specified = false;
 314    this->bound_sampler_specified = false;
 315    this->bound_image_specified = false;
 316 }
 317
 318 /**
 319  * Determine whether the current GLSL version is sufficiently high to support
 320  * a certain feature, and generate an error message if it isn't.
 321  *
 322  * \param required_glsl_version and \c required_glsl_es_version are
 323  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 324  *
 325  * \param locp is the parser location where the error should be reported.
 326  *
 327  * \param fmt (and additional arguments) constitute a printf-style error
 328  * message to report if the version check fails.  Information about the
 329  * current and required GLSL versions will be appended.  So, for example, if
 330  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 331  * "foo unsupported") is called, the error message will be "foo unsupported in
 332  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 333  */
 334 bool
 335 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 336                                       unsigned required_glsl_es_version,
 337                                       YYLTYPE *locp, const char *fmt, ...)
 338 {
 339    if (this->is_version(required_glsl_version, required_glsl_es_version))
 340       return true;
 341
 342    va_list args;
 343    va_start(args, fmt);
 344    char *problem = ralloc_vasprintf(this, fmt, args);
 345    va_end(args);
 346    const char *glsl_version_string
 347       = glsl_compute_version_string(this, false, required_glsl_version);
 348    const char *glsl_es_version_string
 349       = glsl_compute_version_string(this, true, required_glsl_es_version);
 350    const char *requirement_string = "";
 351    if (required_glsl_version && required_glsl_es_version) {
 352       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 353                                            glsl_version_string,
 354                                            glsl_es_version_string);
 355    } else if (required_glsl_version) {
 356       requirement_string = ralloc_asprintf(this, " (%s required)",
 357                                            glsl_version_string);
 358    } else if (required_glsl_es_version) {
 359       requirement_string = ralloc_asprintf(this, " (%s required)",
 360                                            glsl_es_version_string);
 361    }
 362    _mesa_glsl_error(locp, this, "%s in %s%s",
 363                     problem, this->get_version_string(),
 364                     requirement_string);
 365
 366    return false;
 367 }
 368
 369 /**
 370  * Process a GLSL #version directive.
 371  *
 372  * \param version is the integer that follows the #version token.
 373  *
 374  * \param ident is a string identifier that follows the integer, if any is
 375  * present.  Otherwise NULL.
 376  */
 377 void
 378 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 379                                                   const char *ident)
 380 {
 381    bool es_token_present = false;
 382    bool compat_token_present = false;
 383    if (ident) {
 384       if (strcmp(ident, "es") == 0) {
 385          es_token_present = true;
 386       } else if (version >= 150) {
 387          if (strcmp(ident, "core") == 0) {
 388             /* Accept the token.  There's no need to record that this is
 389              * a core profile shader since that's the only profile we support.
 390              */
 391          } else if (strcmp(ident, "compatibility") == 0) {
 392             compat_token_present = true;
 393
 394             if (this->ctx->API != API_OPENGL_COMPAT) {
 395                _mesa_glsl_error(locp, this,
 396                                 "the compatibility profile is not supported");
 397             }
 398          } else {
 399             _mesa_glsl_error(locp, this,
 400                              "\"%s\" is not a valid shading language profile; "
 401                              "if present, it must be \"core\"", ident);
 402          }
 403       } else {
 404          _mesa_glsl_error(locp, this,
 405                           "illegal text following version number");
 406       }
 407    }
 408
 409    this->es_shader = es_token_present;
 410    if (version == 100) {
 411       if (es_token_present) {
 412          _mesa_glsl_error(locp, this,
 413                           "GLSL 1.00 ES should be selected using "
 414                           "`#version 100'");
 415       } else {
 416          this->es_shader = true;
 417       }
 418    }
 419
 420    if (this->es_shader) {
 421       this->ARB_texture_rectangle_enable = false;
 422    }
 423
 424    if (this->forced_language_version)
 425       this->language_version = this->forced_language_version;
 426    else
 427       this->language_version = version;
 428
 429    this->compat_shader = compat_token_present ||
 430                          (!this->es_shader && this->language_version < 140);
 431
 432    bool supported = false;
 433    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 434       if (this->supported_versions[i].ver == this->language_version
 435           && this->supported_versions[i].es == this->es_shader) {
 436          this->gl_version = this->supported_versions[i].gl_ver;
 437          supported = true;
 438          break;
 439       }
 440    }
 441
 442    if (!supported) {
 443       _mesa_glsl_error(locp, this, "%s is not supported. "
 444                        "Supported versions are: %s",
 445                        this->get_version_string(),
 446                        this->supported_version_string);
 447
 448       /* On exit, the language_version must be set to a valid value.
 449        * Later calls to _mesa_glsl_initialize_types will misbehave if
 450        * the version is invalid.
 451        */
 452       switch (this->ctx->API) {
 453       case API_OPENGL_COMPAT:
 454       case API_OPENGL_CORE:
 455          this->language_version = this->ctx->Const.GLSLVersion;
 456          break;
 457
 458       case API_OPENGLES:
 459          assert(!"Should not get here.");
 460          /* FALLTHROUGH */
 461
 462       case API_OPENGLES2:
 463          this->language_version = 100;
 464          break;
 465       }
 466    }
 467 }
 468
 469
 470 /* This helper function will append the given message to the shader's
 471    info log and report it via GL_ARB_debug_output. Per that extension,
 472    'type' is one of the enum values classifying the message, and
 473    'id' is the implementation-defined ID of the given message. */
 474 static void
 475 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 476                GLenum type, const char *fmt, va_list ap)
 477 {
 478    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 479    GLuint msg_id = 0;
 480
 481    assert(state->info_log != NULL);
 482
 483    /* Get the offset that the new message will be written to. */
 484    int msg_offset = strlen(state->info_log);
 485
 486    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 487                                             locp->source,
 488                                             locp->first_line,
 489                                             locp->first_column,
 490                                             error ? "error" : "warning");
 491    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 492
 493    const char *const msg = &state->info_log[msg_offset];
 494    struct gl_context *ctx = state->ctx;
 495
 496    /* Report the error via GL_ARB_debug_output. */
 497    _mesa_shader_debug(ctx, type, &msg_id, msg);
 498
 499    ralloc_strcat(&state->info_log, "\n");
 500 }
 501
 502 void
 503 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 504                  const char *fmt, ...)
 505 {
 506    va_list ap;
 507
 508    state->error = true;
 509
 510    va_start(ap, fmt);
 511    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 512    va_end(ap);
 513 }
 514
 515
 516 void
 517 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 518                    const char *fmt, ...)
 519 {
 520    va_list ap;
 521
 522    va_start(ap, fmt);
 523    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 524    va_end(ap);
 525 }
 526
 527
 528 /**
 529  * Enum representing the possible behaviors that can be specified in
 530  * an #extension directive.
 531  */
 532 enum ext_behavior {
 533    extension_disable,
 534    extension_enable,
 535    extension_require,
 536    extension_warn
 537 };
 538
 539 /**
 540  * Element type for _mesa_glsl_supported_extensions
 541  */
 542 struct _mesa_glsl_extension {
 543    /**
 544     * Name of the extension when referred to in a GLSL extension
 545     * statement
 546     */
 547    const char *name;
 548
 549    /**
 550     * Whether this extension is a part of AEP
 551     */
 552    bool aep;
 553
 554    /**
 555     * Predicate that checks whether the relevant extension is available for
 556     * this context.
 557     */
 558    bool (*available_pred)(const struct gl_context *,
 559                           gl_api api, uint8_t version);
 560
 561    /**
 562     * Flag in the _mesa_glsl_parse_state struct that should be set
 563     * when this extension is enabled.
 564     *
 565     * See note in _mesa_glsl_extension::supported_flag about "pointer
 566     * to member" types.
 567     */
 568    bool _mesa_glsl_parse_state::* enable_flag;
 569
 570    /**
 571     * Flag in the _mesa_glsl_parse_state struct that should be set
 572     * when the shader requests "warn" behavior for this extension.
 573     *
 574     * See note in _mesa_glsl_extension::supported_flag about "pointer
 575     * to member" types.
 576     */
 577    bool _mesa_glsl_parse_state::* warn_flag;
 578
 579
 580    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 581                               gl_api api, uint8_t gl_version) const;
 582    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 583 };
 584
 585 /** Checks if the context supports a user-facing extension */
 586 #define EXT(name_str, driver_cap, ...) \
 587 static MAYBE_UNUSED bool \
 588 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 589 { \
 590    return ctx->Extensions.driver_cap && (version >= \
 591           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 592 }
 593 #include "main/extensions_table.h"
 594 #undef EXT
 595
 596 #define EXT(NAME)                                           \
 597    { "GL_" #NAME, false, has_##NAME,                        \
 598      &_mesa_glsl_parse_state::NAME##_enable,                \
 599      &_mesa_glsl_parse_state::NAME##_warn }
 600
 601 #define EXT_AEP(NAME)                                       \
 602    { "GL_" #NAME, true, has_##NAME,                         \
 603      &_mesa_glsl_parse_state::NAME##_enable,                \
 604      &_mesa_glsl_parse_state::NAME##_warn }
 605
 606 /**
 607  * Table of extensions that can be enabled/disabled within a shader,
 608  * and the conditions under which they are supported.
 609  */
 610 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 611    /* ARB extensions go here, sorted alphabetically.
 612     */
 613    EXT(ARB_ES3_1_compatibility),
 614    EXT(ARB_ES3_2_compatibility),
 615    EXT(ARB_arrays_of_arrays),
 616    EXT(ARB_bindless_texture),
 617    EXT(ARB_compute_shader),
 618    EXT(ARB_compute_variable_group_size),
 619    EXT(ARB_conservative_depth),
 620    EXT(ARB_cull_distance),
 621    EXT(ARB_derivative_control),
 622    EXT(ARB_draw_buffers),
 623    EXT(ARB_draw_instanced),
 624    EXT(ARB_enhanced_layouts),
 625    EXT(ARB_explicit_attrib_location),
 626    EXT(ARB_explicit_uniform_location),
 627    EXT(ARB_fragment_coord_conventions),
 628    EXT(ARB_fragment_layer_viewport),
 629    EXT(ARB_gpu_shader5),
 630    EXT(ARB_gpu_shader_fp64),
 631    EXT(ARB_gpu_shader_int64),
 632    EXT(ARB_post_depth_coverage),
 633    EXT(ARB_sample_shading),
 634    EXT(ARB_separate_shader_objects),
 635    EXT(ARB_shader_atomic_counter_ops),
 636    EXT(ARB_shader_atomic_counters),
 637    EXT(ARB_shader_ballot),
 638    EXT(ARB_shader_bit_encoding),
 639    EXT(ARB_shader_clock),
 640    EXT(ARB_shader_draw_parameters),
 641    EXT(ARB_shader_group_vote),
 642    EXT(ARB_shader_image_load_store),
 643    EXT(ARB_shader_image_size),
 644    EXT(ARB_shader_precision),
 645    EXT(ARB_shader_stencil_export),
 646    EXT(ARB_shader_storage_buffer_object),
 647    EXT(ARB_shader_subroutine),
 648    EXT(ARB_shader_texture_image_samples),
 649    EXT(ARB_shader_texture_lod),
 650    EXT(ARB_shader_viewport_layer_array),
 651    EXT(ARB_shading_language_420pack),
 652    EXT(ARB_shading_language_packing),
 653    EXT(ARB_tessellation_shader),
 654    EXT(ARB_texture_cube_map_array),
 655    EXT(ARB_texture_gather),
 656    EXT(ARB_texture_multisample),
 657    EXT(ARB_texture_query_levels),
 658    EXT(ARB_texture_query_lod),
 659    EXT(ARB_texture_rectangle),
 660    EXT(ARB_uniform_buffer_object),
 661    EXT(ARB_vertex_attrib_64bit),
 662    EXT(ARB_viewport_array),
 663
 664    /* KHR extensions go here, sorted alphabetically.
 665     */
 666    EXT_AEP(KHR_blend_equation_advanced),
 667
 668    /* OES extensions go here, sorted alphabetically.
 669     */
 670    EXT(OES_EGL_image_external),
 671    EXT(OES_geometry_point_size),
 672    EXT(OES_geometry_shader),
 673    EXT(OES_gpu_shader5),
 674    EXT(OES_primitive_bounding_box),
 675    EXT_AEP(OES_sample_variables),
 676    EXT_AEP(OES_shader_image_atomic),
 677    EXT(OES_shader_io_blocks),
 678    EXT_AEP(OES_shader_multisample_interpolation),
 679    EXT(OES_standard_derivatives),
 680    EXT(OES_tessellation_point_size),
 681    EXT(OES_tessellation_shader),
 682    EXT(OES_texture_3D),
 683    EXT(OES_texture_buffer),
 684    EXT(OES_texture_cube_map_array),
 685    EXT_AEP(OES_texture_storage_multisample_2d_array),
 686    EXT(OES_viewport_array),
 687
 688    /* All other extensions go here, sorted alphabetically.
 689     */
 690    EXT(AMD_conservative_depth),
 691    EXT(AMD_shader_stencil_export),
 692    EXT(AMD_shader_trinary_minmax),
 693    EXT(AMD_vertex_shader_layer),
 694    EXT(AMD_vertex_shader_viewport_index),
 695    EXT(ANDROID_extension_pack_es31a),
 696    EXT(EXT_blend_func_extended),
 697    EXT(EXT_frag_depth),
 698    EXT(EXT_draw_buffers),
 699    EXT(EXT_clip_cull_distance),
 700    EXT(EXT_geometry_point_size),
 701    EXT_AEP(EXT_geometry_shader),
 702    EXT_AEP(EXT_gpu_shader5),
 703    EXT_AEP(EXT_primitive_bounding_box),
 704    EXT(EXT_separate_shader_objects),
 705    EXT(EXT_shader_framebuffer_fetch),
 706    EXT(EXT_shader_integer_mix),
 707    EXT_AEP(EXT_shader_io_blocks),
 708    EXT(EXT_shader_samples_identical),
 709    EXT(EXT_tessellation_point_size),
 710    EXT_AEP(EXT_tessellation_shader),
 711    EXT(EXT_texture_array),
 712    EXT_AEP(EXT_texture_buffer),
 713    EXT_AEP(EXT_texture_cube_map_array),
 714    EXT(INTEL_conservative_rasterization),
 715    EXT(MESA_shader_integer_functions),
 716    EXT(NV_image_formats),
 717 };
 718
 719 #undef EXT
 720
 721
 722 /**
 723  * Determine whether a given extension is compatible with the target,
 724  * API, and extension information in the current parser state.
 725  */
 726 bool _mesa_glsl_extension::compatible_with_state(
 727       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 728 {
 729    return this->available_pred(state->ctx, api, gl_version);
 730 }
 731
 732 /**
 733  * Set the appropriate flags in the parser state to establish the
 734  * given behavior for this extension.
 735  */
 736 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 737                                      ext_behavior behavior) const
 738 {
 739    /* Note: the ->* operator indexes into state by the
 740     * offsets this->enable_flag and this->warn_flag.  See
 741     * _mesa_glsl_extension::supported_flag for more info.
 742     */
 743    state->*(this->enable_flag) = (behavior != extension_disable);
 744    state->*(this->warn_flag)   = (behavior == extension_warn);
 745 }
 746
 747 /**
 748  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 749  * the name is not found, return NULL.
 750  */
 751 static const _mesa_glsl_extension *find_extension(const char *name)
 752 {
 753    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 754       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 755          return &_mesa_glsl_supported_extensions[i];
 756       }
 757    }
 758    return NULL;
 759 }
 760
 761 bool
 762 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 763                              const char *behavior_string, YYLTYPE *behavior_locp,
 764                              _mesa_glsl_parse_state *state)
 765 {
 766    uint8_t gl_version = state->ctx->Extensions.Version;
 767    gl_api api = state->ctx->API;
 768    ext_behavior behavior;
 769    if (strcmp(behavior_string, "warn") == 0) {
 770       behavior = extension_warn;
 771    } else if (strcmp(behavior_string, "require") == 0) {
 772       behavior = extension_require;
 773    } else if (strcmp(behavior_string, "enable") == 0) {
 774       behavior = extension_enable;
 775    } else if (strcmp(behavior_string, "disable") == 0) {
 776       behavior = extension_disable;
 777    } else {
 778       _mesa_glsl_error(behavior_locp, state,
 779                        "unknown extension behavior `%s'",
 780                        behavior_string);
 781       return false;
 782    }
 783
 784    /* If we're in a desktop context but with an ES shader, use an ES API enum
 785     * to verify extension availability.
 786     */
 787    if (state->es_shader && api != API_OPENGLES2)
 788       api = API_OPENGLES2;
 789    /* Use the language-version derived GL version to extension checks, unless
 790     * we're using meta, which sets the version to the max.
 791     */
 792    if (gl_version != 0xff)
 793       gl_version = state->gl_version;
 794
 795    if (strcmp(name, "all") == 0) {
 796       if ((behavior == extension_enable) || (behavior == extension_require)) {
 797          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 798                           (behavior == extension_enable)
 799                           ? "enable" : "require");
 800          return false;
 801       } else {
 802          for (unsigned i = 0;
 803               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 804             const _mesa_glsl_extension *extension
 805                = &_mesa_glsl_supported_extensions[i];
 806             if (extension->compatible_with_state(state, api, gl_version)) {
 807                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 808             }
 809          }
 810       }
 811    } else {
 812       const _mesa_glsl_extension *extension = find_extension(name);
 813       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 814          extension->set_flags(state, behavior);
 815          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 816             for (unsigned i = 0;
 817                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 818                const _mesa_glsl_extension *extension =
 819                   &_mesa_glsl_supported_extensions[i];
 820
 821                if (!extension->aep)
 822                   continue;
 823                /* AEP should not be enabled if all of the sub-extensions can't
 824                 * also be enabled. This is not the proper layer to do such
 825                 * error-checking though.
 826                 */
 827                assert(extension->compatible_with_state(state, api, gl_version));
 828                extension->set_flags(state, behavior);
 829             }
 830          }
 831       } else {
 832          static const char fmt[] = "extension `%s' unsupported in %s shader";
 833
 834          if (behavior == extension_require) {
 835             _mesa_glsl_error(name_locp, state, fmt,
 836                              name, _mesa_shader_stage_to_string(state->stage));
 837             return false;
 838          } else {
 839             _mesa_glsl_warning(name_locp, state, fmt,
 840                                name, _mesa_shader_stage_to_string(state->stage));
 841          }
 842       }
 843    }
 844
 845    return true;
 846 }
 847
 848
 849 /**
 850  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 851  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 852  * (process_array_constructor, et al) sufficient information to do type
 853  * checking.
 854  *
 855  * Operates on assignments involving an aggregate initializer. E.g.,
 856  *
 857  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 858  *
 859  * or more ridiculously,
 860  *
 861  * struct S {
 862  *     vec4 v[2];
 863  * };
 864  *
 865  * struct {
 866  *     S a[2], b;
 867  *     int c;
 868  * } aggregate = {
 869  *     {
 870  *         {
 871  *             {
 872  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 873  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 874  *             } // a[0].v
 875  *         }, // a[0]
 876  *         {
 877  *             {
 878  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 879  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 880  *             } // a[1].v
 881  *         } // a[1]
 882  *     }, // a
 883  *     {
 884  *         {
 885  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 886  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 887  *         } // b.v
 888  *     }, // b
 889  *     4 // c
 890  * };
 891  *
 892  * This pass is necessary because the right-hand side of <type> e = { ... }
 893  * doesn't contain sufficient information to determine if the types match.
 894  */
 895 void
 896 _mesa_ast_set_aggregate_type(const glsl_type *type,
 897                              ast_expression *expr)
 898 {
 899    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 900    ai->constructor_type = type;
 901
 902    /* If the aggregate is an array, recursively set its elements' types. */
 903    if (type->is_array()) {
 904       /* Each array element has the type type->fields.array.
 905        *
 906        * E.g., if <type> if struct S[2] we want to set each element's type to
 907        * struct S.
 908        */
 909       for (exec_node *expr_node = ai->expressions.get_head_raw();
 910            !expr_node->is_tail_sentinel();
 911            expr_node = expr_node->next) {
 912          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 913                                                link);
 914
 915          if (expr->oper == ast_aggregate)
 916             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 917       }
 918
 919    /* If the aggregate is a struct, recursively set its fields' types. */
 920    } else if (type->is_record()) {
 921       exec_node *expr_node = ai->expressions.get_head_raw();
 922
 923       /* Iterate through the struct's fields. */
 924       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 925            i++, expr_node = expr_node->next) {
 926          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 927                                                link);
 928
 929          if (expr->oper == ast_aggregate) {
 930             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 931          }
 932       }
 933    /* If the aggregate is a matrix, set its columns' types. */
 934    } else if (type->is_matrix()) {
 935       for (exec_node *expr_node = ai->expressions.get_head_raw();
 936            !expr_node->is_tail_sentinel();
 937            expr_node = expr_node->next) {
 938          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 939                                                link);
 940
 941          if (expr->oper == ast_aggregate)
 942             _mesa_ast_set_aggregate_type(type->column_type(), expr);
 943       }
 944    }
 945 }
 946
 947 void
 948 _mesa_ast_process_interface_block(YYLTYPE *locp,
 949                                   _mesa_glsl_parse_state *state,
 950                                   ast_interface_block *const block,
 951                                   const struct ast_type_qualifier &q)
 952 {
 953    if (q.flags.q.buffer) {
 954       if (!state->has_shader_storage_buffer_objects()) {
 955          _mesa_glsl_error(locp, state,
 956                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 957                           "required for defining shader storage blocks");
 958       } else if (state->ARB_shader_storage_buffer_object_warn) {
 959          _mesa_glsl_warning(locp, state,
 960                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 961                             "required for defining shader storage blocks");
 962       }
 963    } else if (q.flags.q.uniform) {
 964       if (!state->has_uniform_buffer_objects()) {
 965          _mesa_glsl_error(locp, state,
 966                           "#version 140 / GL_ARB_uniform_buffer_object "
 967                           "required for defining uniform blocks");
 968       } else if (state->ARB_uniform_buffer_object_warn) {
 969          _mesa_glsl_warning(locp, state,
 970                             "#version 140 / GL_ARB_uniform_buffer_object "
 971                             "required for defining uniform blocks");
 972       }
 973    } else {
 974       if (!state->has_shader_io_blocks()) {
 975          if (state->es_shader) {
 976             _mesa_glsl_error(locp, state,
 977                              "GL_OES_shader_io_blocks or #version 320 "
 978                              "required for using interface blocks");
 979          } else {
 980             _mesa_glsl_error(locp, state,
 981                              "#version 150 required for using "
 982                              "interface blocks");
 983          }
 984       }
 985    }
 986
 987    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
 988     * "It is illegal to have an input block in a vertex shader
 989     *  or an output block in a fragment shader"
 990     */
 991    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
 992       _mesa_glsl_error(locp, state,
 993                        "`in' interface block is not allowed for "
 994                        "a vertex shader");
 995    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
 996       _mesa_glsl_error(locp, state,
 997                        "`out' interface block is not allowed for "
 998                        "a fragment shader");
 999    }
1000
1001    /* Since block arrays require names, and both features are added in
1002     * the same language versions, we don't have to explicitly
1003     * version-check both things.
1004     */
1005    if (block->instance_name != NULL) {
1006       state->check_version(150, 300, locp, "interface blocks with "
1007                            "an instance name are not allowed");
1008    }
1009
1010    uint64_t interface_type_mask;
1011    struct ast_type_qualifier temp_type_qualifier;
1012
1013    /* Get a bitmask containing only the in/out/uniform/buffer
1014     * flags, allowing us to ignore other irrelevant flags like
1015     * interpolation qualifiers.
1016     */
1017    temp_type_qualifier.flags.i = 0;
1018    temp_type_qualifier.flags.q.uniform = true;
1019    temp_type_qualifier.flags.q.in = true;
1020    temp_type_qualifier.flags.q.out = true;
1021    temp_type_qualifier.flags.q.buffer = true;
1022    temp_type_qualifier.flags.q.patch = true;
1023    interface_type_mask = temp_type_qualifier.flags.i;
1024
1025    /* Get the block's interface qualifier.  The interface_qualifier
1026     * production rule guarantees that only one bit will be set (and
1027     * it will be in/out/uniform).
1028     */
1029    uint64_t block_interface_qualifier = q.flags.i;
1030
1031    block->default_layout.flags.i |= block_interface_qualifier;
1032
1033    if (state->stage == MESA_SHADER_GEOMETRY &&
1034        state->has_explicit_attrib_stream() &&
1035        block->default_layout.flags.q.out) {
1036       /* Assign global layout's stream value. */
1037       block->default_layout.flags.q.stream = 1;
1038       block->default_layout.flags.q.explicit_stream = 0;
1039       block->default_layout.stream = state->out_qualifier->stream;
1040    }
1041
1042    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1043       /* Assign global layout's xfb_buffer value. */
1044       block->default_layout.flags.q.xfb_buffer = 1;
1045       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1046       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1047    }
1048
1049    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1050       ast_type_qualifier& qualifier = member->type->qualifier;
1051       if ((qualifier.flags.i & interface_type_mask) == 0) {
1052          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1053           * "If no optional qualifier is used in a member declaration, the
1054           *  qualifier of the variable is just in, out, or uniform as declared
1055           *  by interface-qualifier."
1056           */
1057          qualifier.flags.i |= block_interface_qualifier;
1058       } else if ((qualifier.flags.i & interface_type_mask) !=
1059                  block_interface_qualifier) {
1060          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1061           * "If optional qualifiers are used, they can include interpolation
1062           *  and storage qualifiers and they must declare an input, output,
1063           *  or uniform variable consistent with the interface qualifier of
1064           *  the block."
1065           */
1066          _mesa_glsl_error(locp, state,
1067                           "uniform/in/out qualifier on "
1068                           "interface block member does not match "
1069                           "the interface block");
1070       }
1071
1072       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1073          _mesa_glsl_error(locp, state,
1074                           "invariant qualifiers can be used only "
1075                           "in interface block members for shader "
1076                           "inputs or outputs");
1077    }
1078 }
1079
1080 void
1081 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1082 {
1083    if (q->is_subroutine_decl())
1084       printf("subroutine ");
1085
1086    if (q->subroutine_list) {
1087       printf("subroutine (");
1088       q->subroutine_list->print();
1089       printf(")");
1090    }
1091
1092    if (q->flags.q.constant)
1093       printf("const ");
1094
1095    if (q->flags.q.invariant)
1096       printf("invariant ");
1097
1098    if (q->flags.q.attribute)
1099       printf("attribute ");
1100
1101    if (q->flags.q.varying)
1102       printf("varying ");
1103
1104    if (q->flags.q.in && q->flags.q.out)
1105       printf("inout ");
1106    else {
1107       if (q->flags.q.in)
1108          printf("in ");
1109
1110       if (q->flags.q.out)
1111          printf("out ");
1112    }
1113
1114    if (q->flags.q.centroid)
1115       printf("centroid ");
1116    if (q->flags.q.sample)
1117       printf("sample ");
1118    if (q->flags.q.patch)
1119       printf("patch ");
1120    if (q->flags.q.uniform)
1121       printf("uniform ");
1122    if (q->flags.q.buffer)
1123       printf("buffer ");
1124    if (q->flags.q.smooth)
1125       printf("smooth ");
1126    if (q->flags.q.flat)
1127       printf("flat ");
1128    if (q->flags.q.noperspective)
1129       printf("noperspective ");
1130 }
1131
1132
1133 void
1134 ast_node::print(void) const
1135 {
1136    printf("unhandled node ");
1137 }
1138
1139
1140 ast_node::ast_node(void)
1141 {
1142    this->location.source = 0;
1143    this->location.first_line = 0;
1144    this->location.first_column = 0;
1145    this->location.last_line = 0;
1146    this->location.last_column = 0;
1147 }
1148
1149
1150 static void
1151 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1152 {
1153    if (array_specifier)
1154       array_specifier->print();
1155 }
1156
1157
1158 void
1159 ast_compound_statement::print(void) const
1160 {
1161    printf("{\n");
1162
1163    foreach_list_typed(ast_node, ast, link, &this->statements) {
1164       ast->print();
1165    }
1166
1167    printf("}\n");
1168 }
1169
1170
1171 ast_compound_statement::ast_compound_statement(int new_scope,
1172                                                ast_node *statements)
1173 {
1174    this->new_scope = new_scope;
1175
1176    if (statements != NULL) {
1177       this->statements.push_degenerate_list_at_head(&statements->link);
1178    }
1179 }
1180
1181
1182 void
1183 ast_expression::print(void) const
1184 {
1185    switch (oper) {
1186    case ast_assign:
1187    case ast_mul_assign:
1188    case ast_div_assign:
1189    case ast_mod_assign:
1190    case ast_add_assign:
1191    case ast_sub_assign:
1192    case ast_ls_assign:
1193    case ast_rs_assign:
1194    case ast_and_assign:
1195    case ast_xor_assign:
1196    case ast_or_assign:
1197       subexpressions[0]->print();
1198       printf("%s ", operator_string(oper));
1199       subexpressions[1]->print();
1200       break;
1201
1202    case ast_field_selection:
1203       subexpressions[0]->print();
1204       printf(". %s ", primary_expression.identifier);
1205       break;
1206
1207    case ast_plus:
1208    case ast_neg:
1209    case ast_bit_not:
1210    case ast_logic_not:
1211    case ast_pre_inc:
1212    case ast_pre_dec:
1213       printf("%s ", operator_string(oper));
1214       subexpressions[0]->print();
1215       break;
1216
1217    case ast_post_inc:
1218    case ast_post_dec:
1219       subexpressions[0]->print();
1220       printf("%s ", operator_string(oper));
1221       break;
1222
1223    case ast_conditional:
1224       subexpressions[0]->print();
1225       printf("? ");
1226       subexpressions[1]->print();
1227       printf(": ");
1228       subexpressions[2]->print();
1229       break;
1230
1231    case ast_array_index:
1232       subexpressions[0]->print();
1233       printf("[ ");
1234       subexpressions[1]->print();
1235       printf("] ");
1236       break;
1237
1238    case ast_function_call: {
1239       subexpressions[0]->print();
1240       printf("( ");
1241
1242       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1243          if (&ast->link != this->expressions.get_head())
1244             printf(", ");
1245
1246          ast->print();
1247       }
1248
1249       printf(") ");
1250       break;
1251    }
1252
1253    case ast_identifier:
1254       printf("%s ", primary_expression.identifier);
1255       break;
1256
1257    case ast_int_constant:
1258       printf("%d ", primary_expression.int_constant);
1259       break;
1260
1261    case ast_uint_constant:
1262       printf("%u ", primary_expression.uint_constant);
1263       break;
1264
1265    case ast_float_constant:
1266       printf("%f ", primary_expression.float_constant);
1267       break;
1268
1269    case ast_double_constant:
1270       printf("%f ", primary_expression.double_constant);
1271       break;
1272
1273    case ast_int64_constant:
1274       printf("%" PRId64 " ", primary_expression.int64_constant);
1275       break;
1276
1277    case ast_uint64_constant:
1278       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1279       break;
1280
1281    case ast_bool_constant:
1282       printf("%s ",
1283              primary_expression.bool_constant
1284              ? "true" : "false");
1285       break;
1286
1287    case ast_sequence: {
1288       printf("( ");
1289       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1290          if (&ast->link != this->expressions.get_head())
1291             printf(", ");
1292
1293          ast->print();
1294       }
1295       printf(") ");
1296       break;
1297    }
1298
1299    case ast_aggregate: {
1300       printf("{ ");
1301       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1302          if (&ast->link != this->expressions.get_head())
1303             printf(", ");
1304
1305          ast->print();
1306       }
1307       printf("} ");
1308       break;
1309    }
1310
1311    default:
1312       assert(0);
1313       break;
1314    }
1315 }
1316
1317 ast_expression::ast_expression(int oper,
1318                                ast_expression *ex0,
1319                                ast_expression *ex1,
1320                                ast_expression *ex2) :
1321    primary_expression()
1322 {
1323    this->oper = ast_operators(oper);
1324    this->subexpressions[0] = ex0;
1325    this->subexpressions[1] = ex1;
1326    this->subexpressions[2] = ex2;
1327    this->non_lvalue_description = NULL;
1328    this->is_lhs = false;
1329 }
1330
1331
1332 void
1333 ast_expression_statement::print(void) const
1334 {
1335    if (expression)
1336       expression->print();
1337
1338    printf("; ");
1339 }
1340
1341
1342 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1343    expression(ex)
1344 {
1345    /* empty */
1346 }
1347
1348
1349 void
1350 ast_function::print(void) const
1351 {
1352    return_type->print();
1353    printf(" %s (", identifier);
1354
1355    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1356       ast->print();
1357    }
1358
1359    printf(")");
1360 }
1361
1362
1363 ast_function::ast_function(void)
1364    : return_type(NULL), identifier(NULL), is_definition(false),
1365      signature(NULL)
1366 {
1367    /* empty */
1368 }
1369
1370
1371 void
1372 ast_fully_specified_type::print(void) const
1373 {
1374    _mesa_ast_type_qualifier_print(& qualifier);
1375    specifier->print();
1376 }
1377
1378
1379 void
1380 ast_parameter_declarator::print(void) const
1381 {
1382    type->print();
1383    if (identifier)
1384       printf("%s ", identifier);
1385    ast_opt_array_dimensions_print(array_specifier);
1386 }
1387
1388
1389 void
1390 ast_function_definition::print(void) const
1391 {
1392    prototype->print();
1393    body->print();
1394 }
1395
1396
1397 void
1398 ast_declaration::print(void) const
1399 {
1400    printf("%s ", identifier);
1401    ast_opt_array_dimensions_print(array_specifier);
1402
1403    if (initializer) {
1404       printf("= ");
1405       initializer->print();
1406    }
1407 }
1408
1409
1410 ast_declaration::ast_declaration(const char *identifier,
1411                                  ast_array_specifier *array_specifier,
1412                                  ast_expression *initializer)
1413 {
1414    this->identifier = identifier;
1415    this->array_specifier = array_specifier;
1416    this->initializer = initializer;
1417 }
1418
1419
1420 void
1421 ast_declarator_list::print(void) const
1422 {
1423    assert(type || invariant);
1424
1425    if (type)
1426       type->print();
1427    else if (invariant)
1428       printf("invariant ");
1429    else
1430       printf("precise ");
1431
1432    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1433       if (&ast->link != this->declarations.get_head())
1434          printf(", ");
1435
1436       ast->print();
1437    }
1438
1439    printf("; ");
1440 }
1441
1442
1443 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1444 {
1445    this->type = type;
1446    this->invariant = false;
1447    this->precise = false;
1448 }
1449
1450 void
1451 ast_jump_statement::print(void) const
1452 {
1453    switch (mode) {
1454    case ast_continue:
1455       printf("continue; ");
1456       break;
1457    case ast_break:
1458       printf("break; ");
1459       break;
1460    case ast_return:
1461       printf("return ");
1462       if (opt_return_value)
1463          opt_return_value->print();
1464
1465       printf("; ");
1466       break;
1467    case ast_discard:
1468       printf("discard; ");
1469       break;
1470    }
1471 }
1472
1473
1474 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1475    : opt_return_value(NULL)
1476 {
1477    this->mode = ast_jump_modes(mode);
1478
1479    if (mode == ast_return)
1480       opt_return_value = return_value;
1481 }
1482
1483
1484 void
1485 ast_selection_statement::print(void) const
1486 {
1487    printf("if ( ");
1488    condition->print();
1489    printf(") ");
1490
1491    then_statement->print();
1492
1493    if (else_statement) {
1494       printf("else ");
1495       else_statement->print();
1496    }
1497 }
1498
1499
1500 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1501                                                  ast_node *then_statement,
1502                                                  ast_node *else_statement)
1503 {
1504    this->condition = condition;
1505    this->then_statement = then_statement;
1506    this->else_statement = else_statement;
1507 }
1508
1509
1510 void
1511 ast_switch_statement::print(void) const
1512 {
1513    printf("switch ( ");
1514    test_expression->print();
1515    printf(") ");
1516
1517    body->print();
1518 }
1519
1520
1521 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1522                                            ast_node *body)
1523 {
1524    this->test_expression = test_expression;
1525    this->body = body;
1526 }
1527
1528
1529 void
1530 ast_switch_body::print(void) const
1531 {
1532    printf("{\n");
1533    if (stmts != NULL) {
1534       stmts->print();
1535    }
1536    printf("}\n");
1537 }
1538
1539
1540 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1541 {
1542    this->stmts = stmts;
1543 }
1544
1545
1546 void ast_case_label::print(void) const
1547 {
1548    if (test_value != NULL) {
1549       printf("case ");
1550       test_value->print();
1551       printf(": ");
1552    } else {
1553       printf("default: ");
1554    }
1555 }
1556
1557
1558 ast_case_label::ast_case_label(ast_expression *test_value)
1559 {
1560    this->test_value = test_value;
1561 }
1562
1563
1564 void ast_case_label_list::print(void) const
1565 {
1566    foreach_list_typed(ast_node, ast, link, & this->labels) {
1567       ast->print();
1568    }
1569    printf("\n");
1570 }
1571
1572
1573 ast_case_label_list::ast_case_label_list(void)
1574 {
1575 }
1576
1577
1578 void ast_case_statement::print(void) const
1579 {
1580    labels->print();
1581    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1582       ast->print();
1583       printf("\n");
1584    }
1585 }
1586
1587
1588 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1589 {
1590    this->labels = labels;
1591 }
1592
1593
1594 void ast_case_statement_list::print(void) const
1595 {
1596    foreach_list_typed(ast_node, ast, link, & this->cases) {
1597       ast->print();
1598    }
1599 }
1600
1601
1602 ast_case_statement_list::ast_case_statement_list(void)
1603 {
1604 }
1605
1606
1607 void
1608 ast_iteration_statement::print(void) const
1609 {
1610    switch (mode) {
1611    case ast_for:
1612       printf("for( ");
1613       if (init_statement)
1614          init_statement->print();
1615       printf("; ");
1616
1617       if (condition)
1618          condition->print();
1619       printf("; ");
1620
1621       if (rest_expression)
1622          rest_expression->print();
1623       printf(") ");
1624
1625       body->print();
1626       break;
1627
1628    case ast_while:
1629       printf("while ( ");
1630       if (condition)
1631          condition->print();
1632       printf(") ");
1633       body->print();
1634       break;
1635
1636    case ast_do_while:
1637       printf("do ");
1638       body->print();
1639       printf("while ( ");
1640       if (condition)
1641          condition->print();
1642       printf("); ");
1643       break;
1644    }
1645 }
1646
1647
1648 ast_iteration_statement::ast_iteration_statement(int mode,
1649                                                  ast_node *init,
1650                                                  ast_node *condition,
1651                                                  ast_expression *rest_expression,
1652                                                  ast_node *body)
1653 {
1654    this->mode = ast_iteration_modes(mode);
1655    this->init_statement = init;
1656    this->condition = condition;
1657    this->rest_expression = rest_expression;
1658    this->body = body;
1659 }
1660
1661
1662 void
1663 ast_struct_specifier::print(void) const
1664 {
1665    printf("struct %s { ", name);
1666    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1667       ast->print();
1668    }
1669    printf("} ");
1670 }
1671
1672
1673 ast_struct_specifier::ast_struct_specifier(void *lin_ctx, const char *identifier,
1674                                            ast_declarator_list *declarator_list)
1675 {
1676    if (identifier == NULL) {
1677       static mtx_t mutex = _MTX_INITIALIZER_NP;
1678       static unsigned anon_count = 1;
1679       unsigned count;
1680
1681       mtx_lock(&mutex);
1682       count = anon_count++;
1683       mtx_unlock(&mutex);
1684
1685       identifier = linear_asprintf(lin_ctx, "#anon_struct_%04x", count);
1686    }
1687    name = identifier;
1688    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1689    is_declaration = true;
1690    layout = NULL;
1691 }
1692
1693 void ast_subroutine_list::print(void) const
1694 {
1695    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1696       if (&ast->link != this->declarations.get_head())
1697          printf(", ");
1698       ast->print();
1699    }
1700 }
1701
1702 static void
1703 set_shader_inout_layout(struct gl_shader *shader,
1704                      struct _mesa_glsl_parse_state *state)
1705 {
1706    /* Should have been prevented by the parser. */
1707    if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1708        shader->Stage == MESA_SHADER_VERTEX) {
1709       assert(!state->in_qualifier->flags.i);
1710    } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1711               shader->Stage != MESA_SHADER_TESS_EVAL) {
1712       assert(!state->in_qualifier->flags.i);
1713    }
1714
1715    if (shader->Stage != MESA_SHADER_COMPUTE) {
1716       /* Should have been prevented by the parser. */
1717       assert(!state->cs_input_local_size_specified);
1718       assert(!state->cs_input_local_size_variable_specified);
1719    }
1720
1721    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1722       /* Should have been prevented by the parser. */
1723       assert(!state->fs_uses_gl_fragcoord);
1724       assert(!state->fs_redeclares_gl_fragcoord);
1725       assert(!state->fs_pixel_center_integer);
1726       assert(!state->fs_origin_upper_left);
1727       assert(!state->fs_early_fragment_tests);
1728       assert(!state->fs_inner_coverage);
1729       assert(!state->fs_post_depth_coverage);
1730    }
1731
1732    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1733       if (state->out_qualifier->out_xfb_stride[i]) {
1734          unsigned xfb_stride;
1735          if (state->out_qualifier->out_xfb_stride[i]->
1736                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1737                 true)) {
1738             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1739          }
1740       }
1741    }
1742
1743    switch (shader->Stage) {
1744    case MESA_SHADER_TESS_CTRL:
1745       shader->info.TessCtrl.VerticesOut = 0;
1746       if (state->tcs_output_vertices_specified) {
1747          unsigned vertices;
1748          if (state->out_qualifier->vertices->
1749                process_qualifier_constant(state, "vertices", &vertices,
1750                                           false)) {
1751
1752             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1753             if (vertices > state->Const.MaxPatchVertices) {
1754                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1755                                 "GL_MAX_PATCH_VERTICES", vertices);
1756             }
1757             shader->info.TessCtrl.VerticesOut = vertices;
1758          }
1759       }
1760       break;
1761    case MESA_SHADER_TESS_EVAL:
1762       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1763       if (state->in_qualifier->flags.q.prim_type)
1764          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1765
1766       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1767       if (state->in_qualifier->flags.q.vertex_spacing)
1768          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1769
1770       shader->info.TessEval.VertexOrder = 0;
1771       if (state->in_qualifier->flags.q.ordering)
1772          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1773
1774       shader->info.TessEval.PointMode = -1;
1775       if (state->in_qualifier->flags.q.point_mode)
1776          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1777       break;
1778    case MESA_SHADER_GEOMETRY:
1779       shader->info.Geom.VerticesOut = -1;
1780       if (state->out_qualifier->flags.q.max_vertices) {
1781          unsigned qual_max_vertices;
1782          if (state->out_qualifier->max_vertices->
1783                process_qualifier_constant(state, "max_vertices",
1784                                           &qual_max_vertices, true)) {
1785
1786             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1787                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1788                _mesa_glsl_error(&loc, state,
1789                                 "maximum output vertices (%d) exceeds "
1790                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1791                                 qual_max_vertices);
1792             }
1793             shader->info.Geom.VerticesOut = qual_max_vertices;
1794          }
1795       }
1796
1797       if (state->gs_input_prim_type_specified) {
1798          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1799       } else {
1800          shader->info.Geom.InputType = PRIM_UNKNOWN;
1801       }
1802
1803       if (state->out_qualifier->flags.q.prim_type) {
1804          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1805       } else {
1806          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1807       }
1808
1809       shader->info.Geom.Invocations = 0;
1810       if (state->in_qualifier->flags.q.invocations) {
1811          unsigned invocations;
1812          if (state->in_qualifier->invocations->
1813                process_qualifier_constant(state, "invocations",
1814                                           &invocations, false)) {
1815
1816             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1817             if (invocations > MAX_GEOMETRY_SHADER_INVOCATIONS) {
1818                _mesa_glsl_error(&loc, state,
1819                                 "invocations (%d) exceeds "
1820                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1821                                 invocations);
1822             }
1823             shader->info.Geom.Invocations = invocations;
1824          }
1825       }
1826       break;
1827
1828    case MESA_SHADER_COMPUTE:
1829       if (state->cs_input_local_size_specified) {
1830          for (int i = 0; i < 3; i++)
1831             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1832       } else {
1833          for (int i = 0; i < 3; i++)
1834             shader->info.Comp.LocalSize[i] = 0;
1835       }
1836
1837       shader->info.Comp.LocalSizeVariable =
1838          state->cs_input_local_size_variable_specified;
1839       break;
1840
1841    case MESA_SHADER_FRAGMENT:
1842       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1843       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1844       shader->pixel_center_integer = state->fs_pixel_center_integer;
1845       shader->origin_upper_left = state->fs_origin_upper_left;
1846       shader->ARB_fragment_coord_conventions_enable =
1847          state->ARB_fragment_coord_conventions_enable;
1848       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1849       shader->InnerCoverage = state->fs_inner_coverage;
1850       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1851       shader->BlendSupport = state->fs_blend_support;
1852       break;
1853
1854    default:
1855       /* Nothing to do. */
1856       break;
1857    }
1858
1859    shader->bindless_sampler = state->bindless_sampler_specified;
1860    shader->bindless_image = state->bindless_image_specified;
1861    shader->bound_sampler = state->bound_sampler_specified;
1862    shader->bound_image = state->bound_image_specified;
1863 }
1864
1865 extern "C" {
1866
1867 static void
1868 assign_subroutine_indexes(struct gl_shader *sh,
1869                           struct _mesa_glsl_parse_state *state)
1870 {
1871    int j, k;
1872    int index = 0;
1873
1874    for (j = 0; j < state->num_subroutines; j++) {
1875       while (state->subroutines[j]->subroutine_index == -1) {
1876          for (k = 0; k < state->num_subroutines; k++) {
1877             if (state->subroutines[k]->subroutine_index == index)
1878                break;
1879             else if (k == state->num_subroutines - 1) {
1880                state->subroutines[j]->subroutine_index = index;
1881             }
1882          }
1883          index++;
1884       }
1885    }
1886 }
1887
1888 static void
1889 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1890                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1891                     struct glcpp_parser *data,
1892                     unsigned version,
1893                     bool es)
1894 {
1895    unsigned gl_version = state->ctx->Extensions.Version;
1896    gl_api api = state->ctx->API;
1897
1898    if (gl_version != 0xff) {
1899       unsigned i;
1900       for (i = 0; i < state->num_supported_versions; i++) {
1901          if (state->supported_versions[i].ver == version &&
1902              state->supported_versions[i].es == es) {
1903             gl_version = state->supported_versions[i].gl_ver;
1904             break;
1905          }
1906       }
1907
1908       if (i == state->num_supported_versions)
1909          return;
1910    }
1911
1912    if (es)
1913       api = API_OPENGLES2;
1914
1915    for (unsigned i = 0;
1916         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
1917       const _mesa_glsl_extension *extension
1918          = &_mesa_glsl_supported_extensions[i];
1919       if (extension->compatible_with_state(state, api, gl_version)) {
1920          add_builtin_define(data, extension->name, 1);
1921       }
1922    }
1923 }
1924
1925 /* Implements parsing checks that we can't do during parsing */
1926 static void
1927 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
1928 {
1929    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
1930       YYLTYPE loc;
1931       memset(&loc, 0, sizeof(loc));
1932       _mesa_glsl_error(&loc, state, "Compute shaders require "
1933                        "GLSL 4.30 or GLSL ES 3.10");
1934    }
1935 }
1936
1937 static void
1938 opt_shader_and_create_symbol_table(struct gl_context *ctx,
1939                                    struct gl_shader *shader)
1940 {
1941    assert(shader->CompileStatus != compile_failure &&
1942           !shader->ir->is_empty());
1943
1944    struct gl_shader_compiler_options *options =
1945       &ctx->Const.ShaderCompilerOptions[shader->Stage];
1946
1947    /* Do some optimization at compile time to reduce shader IR size
1948     * and reduce later work if the same shader is linked multiple times
1949     */
1950    if (ctx->Const.GLSLOptimizeConservatively) {
1951       /* Run it just once. */
1952       do_common_optimization(shader->ir, false, false, options,
1953                              ctx->Const.NativeIntegers);
1954    } else {
1955       /* Repeat it until it stops making changes. */
1956       while (do_common_optimization(shader->ir, false, false, options,
1957                                     ctx->Const.NativeIntegers))
1958          ;
1959    }
1960
1961    validate_ir_tree(shader->ir);
1962
1963    enum ir_variable_mode other;
1964    switch (shader->Stage) {
1965    case MESA_SHADER_VERTEX:
1966       other = ir_var_shader_in;
1967       break;
1968    case MESA_SHADER_FRAGMENT:
1969       other = ir_var_shader_out;
1970       break;
1971    default:
1972       /* Something invalid to ensure optimize_dead_builtin_uniforms
1973        * doesn't remove anything other than uniforms or constants.
1974        */
1975       other = ir_var_mode_count;
1976       break;
1977    }
1978
1979    optimize_dead_builtin_variables(shader->ir, other);
1980
1981    validate_ir_tree(shader->ir);
1982
1983    /* Retain any live IR, but trash the rest. */
1984    reparent_ir(shader->ir, shader->ir);
1985
1986    /* Destroy the symbol table.  Create a new symbol table that contains only
1987     * the variables and functions that still exist in the IR.  The symbol
1988     * table will be used later during linking.
1989     *
1990     * There must NOT be any freed objects still referenced by the symbol
1991     * table.  That could cause the linker to dereference freed memory.
1992     *
1993     * We don't have to worry about types or interface-types here because those
1994     * are fly-weights that are looked up by glsl_type.
1995     */
1996    foreach_in_list (ir_instruction, ir, shader->ir) {
1997       switch (ir->ir_type) {
1998       case ir_type_function:
1999          shader->symbols->add_function((ir_function *) ir);
2000          break;
2001       case ir_type_variable: {
2002          ir_variable *const var = (ir_variable *) ir;
2003
2004          if (var->data.mode != ir_var_temporary)
2005             shader->symbols->add_variable(var);
2006          break;
2007       }
2008       default:
2009          break;
2010       }
2011    }
2012
2013    _mesa_glsl_initialize_derived_variables(ctx, shader);
2014 }
2015
2016 void
2017 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2018                           bool dump_ast, bool dump_hir, bool force_recompile)
2019 {
2020    const char *source = force_recompile && shader->FallbackSource ?
2021       shader->FallbackSource : shader->Source;
2022
2023    if (!force_recompile) {
2024       if (ctx->Cache) {
2025          char buf[41];
2026          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2027                                 shader->sha1);
2028          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2029             /* We've seen this shader before and know it compiles */
2030             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2031                _mesa_sha1_format(buf, shader->sha1);
2032                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2033             }
2034             shader->CompileStatus = compile_skipped;
2035
2036             free((void *)shader->FallbackSource);
2037             shader->FallbackSource = NULL;
2038             return;
2039          }
2040       }
2041    } else {
2042       /* We should only ever end up here if a re-compile has been forced by a
2043        * shader cache miss. In which case we can skip the compile if its
2044        * already be done by a previous fallback or the initial compile call.
2045        */
2046       if (shader->CompileStatus == compile_success)
2047          return;
2048
2049       if (shader->CompileStatus == compiled_no_opts) {
2050          opt_shader_and_create_symbol_table(ctx, shader);
2051          shader->CompileStatus = compile_success;
2052          return;
2053       }
2054    }
2055
2056    struct _mesa_glsl_parse_state *state =
2057       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2058
2059    if (ctx->Const.GenerateTemporaryNames)
2060       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2061                               false, true);
2062
2063    state->error = glcpp_preprocess(state, &source, &state->info_log,
2064                                    add_builtin_defines, state, ctx);
2065
2066    if (!state->error) {
2067      _mesa_glsl_lexer_ctor(state, source);
2068      _mesa_glsl_parse(state);
2069      _mesa_glsl_lexer_dtor(state);
2070      do_late_parsing_checks(state);
2071    }
2072
2073    if (dump_ast) {
2074       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2075          ast->print();
2076       }
2077       printf("\n\n");
2078    }
2079
2080    ralloc_free(shader->ir);
2081    shader->ir = new(shader) exec_list;
2082    if (!state->error && !state->translation_unit.is_empty())
2083       _mesa_ast_to_hir(shader->ir, state);
2084
2085    if (!state->error) {
2086       validate_ir_tree(shader->ir);
2087
2088       /* Print out the unoptimized IR. */
2089       if (dump_hir) {
2090          _mesa_print_ir(stdout, shader->ir, state);
2091       }
2092    }
2093
2094    if (shader->InfoLog)
2095       ralloc_free(shader->InfoLog);
2096
2097    if (!state->error)
2098       set_shader_inout_layout(shader, state);
2099
2100    shader->symbols = new(shader->ir) glsl_symbol_table;
2101    shader->CompileStatus = state->error ? compile_failure : compile_success;
2102    shader->InfoLog = state->info_log;
2103    shader->Version = state->language_version;
2104    shader->IsES = state->es_shader;
2105
2106    if (!state->error && !shader->ir->is_empty()) {
2107       assign_subroutine_indexes(shader, state);
2108       lower_subroutine(shader->ir, state);
2109
2110       if (!ctx->Cache || force_recompile)
2111          opt_shader_and_create_symbol_table(ctx, shader);
2112       else {
2113          reparent_ir(shader->ir, shader->ir);
2114          shader->CompileStatus = compiled_no_opts;
2115       }
2116    }
2117
2118    if (!force_recompile) {
2119       free((void *)shader->FallbackSource);
2120       shader->FallbackSource = NULL;
2121    }
2122
2123    delete state->symbols;
2124    ralloc_free(state);
2125 }
2126
2127 } /* extern "C" */
2128 /**
2129  * Do the set of common optimizations passes
2130  *
2131  * \param ir                          List of instructions to be optimized
2132  * \param linked                      Is the shader linked?  This enables
2133  *                                    optimizations passes that remove code at
2134  *                                    global scope and could cause linking to
2135  *                                    fail.
2136  * \param uniform_locations_assigned  Have locations already been assigned for
2137  *                                    uniforms?  This prevents the declarations
2138  *                                    of unused uniforms from being removed.
2139  *                                    The setting of this flag only matters if
2140  *                                    \c linked is \c true.
2141  * \param options                     The driver's preferred shader options.
2142  * \param native_integers             Selects optimizations that depend on the
2143  *                                    implementations supporting integers
2144  *                                    natively (as opposed to supporting
2145  *                                    integers in floating point registers).
2146  */
2147 bool
2148 do_common_optimization(exec_list *ir, bool linked,
2149                        bool uniform_locations_assigned,
2150                        const struct gl_shader_compiler_options *options,
2151                        bool native_integers)
2152 {
2153    const bool debug = false;
2154    GLboolean progress = GL_FALSE;
2155
2156 #define OPT(PASS, ...) do {                                             \
2157       if (debug) {                                                      \
2158          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2159          const bool opt_progress = PASS(__VA_ARGS__);                   \
2160          progress = opt_progress || progress;                           \
2161          if (opt_progress)                                              \
2162             _mesa_print_ir(stderr, ir, NULL);                           \
2163          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2164                  #PASS, opt_progress ? "made" : "no");                  \
2165       } else {                                                          \
2166          progress = PASS(__VA_ARGS__) || progress;                      \
2167       }                                                                 \
2168    } while (false)
2169
2170    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2171
2172    if (linked) {
2173       OPT(do_function_inlining, ir);
2174       OPT(do_dead_functions, ir);
2175       OPT(do_structure_splitting, ir);
2176    }
2177    propagate_invariance(ir);
2178    OPT(do_if_simplification, ir);
2179    OPT(opt_flatten_nested_if_blocks, ir);
2180    OPT(opt_conditional_discard, ir);
2181    OPT(do_copy_propagation, ir);
2182    OPT(do_copy_propagation_elements, ir);
2183
2184    if (options->OptimizeForAOS && !linked)
2185       OPT(opt_flip_matrices, ir);
2186
2187    if (linked && options->OptimizeForAOS) {
2188       OPT(do_vectorize, ir);
2189    }
2190
2191    if (linked)
2192       OPT(do_dead_code, ir, uniform_locations_assigned);
2193    else
2194       OPT(do_dead_code_unlinked, ir);
2195    OPT(do_dead_code_local, ir);
2196    OPT(do_tree_grafting, ir);
2197    OPT(do_constant_propagation, ir);
2198    if (linked)
2199       OPT(do_constant_variable, ir);
2200    else
2201       OPT(do_constant_variable_unlinked, ir);
2202    OPT(do_constant_folding, ir);
2203    OPT(do_minmax_prune, ir);
2204    OPT(do_rebalance_tree, ir);
2205    OPT(do_algebraic, ir, native_integers, options);
2206    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2207        options->EmitNoCont, options->EmitNoLoops);
2208    OPT(do_vec_index_to_swizzle, ir);
2209    OPT(lower_vector_insert, ir, false);
2210    OPT(do_swizzle_swizzle, ir);
2211    OPT(do_noop_swizzle, ir);
2212
2213    OPT(optimize_split_arrays, ir, linked);
2214    OPT(optimize_redundant_jumps, ir);
2215
2216    if (options->MaxUnrollIterations) {
2217       loop_state *ls = analyze_loop_variables(ir);
2218       if (ls->loop_found) {
2219          OPT(set_loop_controls, ir, ls);
2220          OPT(unroll_loops, ir, ls, options);
2221       }
2222       delete ls;
2223    }
2224
2225 #undef OPT
2226
2227    return progress;
2228 }
2229
2230 extern "C" {
2231
2232 /**
2233  * To be called at GL teardown time, this frees compiler datastructures.
2234  *
2235  * After calling this, any previously compiled shaders and shader
2236  * programs would be invalid.  So this should happen at approximately
2237  * program exit.
2238  */
2239 void
2240 _mesa_destroy_shader_compiler(void)
2241 {
2242    _mesa_destroy_shader_compiler_caches();
2243
2244    _mesa_glsl_release_types();
2245 }
2246
2247 /**
2248  * Releases compiler caches to trade off performance for memory.
2249  *
2250  * Intended to be used with glReleaseShaderCompiler().
2251  */
2252 void
2253 _mesa_destroy_shader_compiler_caches(void)
2254 {
2255    _mesa_glsl_release_builtin_functions();
2256 }
2257
2258 }