src/compiler/glsl/glsl_parser_extras.cpp

   1 /*
   2  * Copyright © 2008, 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23 #include <inttypes.h> /* for PRIx64 macro */
  24 #include <stdio.h>
  25 #include <stdarg.h>
  26 #include <string.h>
  27 #include <assert.h>
  28
  29 #include "main/core.h" /* for struct gl_context */
  30 #include "main/context.h"
  31 #include "main/debug_output.h"
  32 #include "main/formats.h"
  33 #include "main/shaderobj.h"
  34 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
  35 #include "util/ralloc.h"
  36 #include "util/disk_cache.h"
  37 #include "util/mesa-sha1.h"
  38 #include "ast.h"
  39 #include "glsl_parser_extras.h"
  40 #include "glsl_parser.h"
  41 #include "ir_optimization.h"
  42 #include "loop_analysis.h"
  43 #include "builtin_functions.h"
  44
  45 /**
  46  * Format a short human-readable description of the given GLSL version.
  47  */
  48 const char *
  49 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version)
  50 {
  51    return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "",
  52                           version / 100, version % 100);
  53 }
  54
  55
  56 static const unsigned known_desktop_glsl_versions[] =
  57    { 110, 120, 130, 140, 150, 330, 400, 410, 420, 430, 440, 450, 460 };
  58 static const unsigned known_desktop_gl_versions[] =
  59    {  20,  21,  30,  31,  32,  33,  40,  41,  42,  43,  44,  45, 46 };
  60
  61
  62 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
  63                                                gl_shader_stage stage,
  64                                                void *mem_ctx)
  65    : ctx(_ctx), cs_input_local_size_specified(false), cs_input_local_size(),
  66      switch_state()
  67 {
  68    assert(stage < MESA_SHADER_STAGES);
  69    this->stage = stage;
  70
  71    this->scanner = NULL;
  72    this->translation_unit.make_empty();
  73    this->symbols = new(mem_ctx) glsl_symbol_table;
  74
  75    this->linalloc = linear_alloc_parent(this, 0);
  76
  77    this->info_log = ralloc_strdup(mem_ctx, "");
  78    this->error = false;
  79    this->loop_nesting_ast = NULL;
  80
  81    this->uses_builtin_functions = false;
  82
  83    /* Set default language version and extensions */
  84    this->language_version = 110;
  85    this->forced_language_version = ctx->Const.ForceGLSLVersion;
  86    this->zero_init = ctx->Const.GLSLZeroInit;
  87    this->gl_version = 20;
  88    this->compat_shader = true;
  89    this->es_shader = false;
  90    this->ARB_texture_rectangle_enable = true;
  91
  92    /* OpenGL ES 2.0 has different defaults from desktop GL. */
  93    if (ctx->API == API_OPENGLES2) {
  94       this->language_version = 100;
  95       this->es_shader = true;
  96       this->ARB_texture_rectangle_enable = false;
  97    }
  98
  99    this->extensions = &ctx->Extensions;
 100
 101    this->Const.MaxLights = ctx->Const.MaxLights;
 102    this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
 103    this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
 104    this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
 105    this->Const.MaxVertexAttribs = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs;
 106    this->Const.MaxVertexUniformComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxUniformComponents;
 107    this->Const.MaxVertexTextureImageUnits = ctx->Const.Program[MESA_SHADER_VERTEX].MaxTextureImageUnits;
 108    this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
 109    this->Const.MaxTextureImageUnits = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits;
 110    this->Const.MaxFragmentUniformComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxUniformComponents;
 111    this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset;
 112    this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset;
 113
 114    this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
 115
 116    this->Const.MaxDualSourceDrawBuffers = ctx->Const.MaxDualSourceDrawBuffers;
 117
 118    /* 1.50 constants */
 119    this->Const.MaxVertexOutputComponents = ctx->Const.Program[MESA_SHADER_VERTEX].MaxOutputComponents;
 120    this->Const.MaxGeometryInputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxInputComponents;
 121    this->Const.MaxGeometryOutputComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxOutputComponents;
 122    this->Const.MaxFragmentInputComponents = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxInputComponents;
 123    this->Const.MaxGeometryTextureImageUnits = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits;
 124    this->Const.MaxGeometryOutputVertices = ctx->Const.MaxGeometryOutputVertices;
 125    this->Const.MaxGeometryTotalOutputComponents = ctx->Const.MaxGeometryTotalOutputComponents;
 126    this->Const.MaxGeometryUniformComponents = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxUniformComponents;
 127
 128    this->Const.MaxVertexAtomicCounters = ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicCounters;
 129    this->Const.MaxTessControlAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicCounters;
 130    this->Const.MaxTessEvaluationAtomicCounters = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicCounters;
 131    this->Const.MaxGeometryAtomicCounters = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicCounters;
 132    this->Const.MaxFragmentAtomicCounters = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
 133    this->Const.MaxComputeAtomicCounters = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicCounters;
 134    this->Const.MaxCombinedAtomicCounters = ctx->Const.MaxCombinedAtomicCounters;
 135    this->Const.MaxAtomicBufferBindings = ctx->Const.MaxAtomicBufferBindings;
 136    this->Const.MaxVertexAtomicCounterBuffers =
 137       ctx->Const.Program[MESA_SHADER_VERTEX].MaxAtomicBuffers;
 138    this->Const.MaxTessControlAtomicCounterBuffers =
 139       ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers;
 140    this->Const.MaxTessEvaluationAtomicCounterBuffers =
 141       ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers;
 142    this->Const.MaxGeometryAtomicCounterBuffers =
 143       ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers;
 144    this->Const.MaxFragmentAtomicCounterBuffers =
 145       ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
 146    this->Const.MaxComputeAtomicCounterBuffers =
 147       ctx->Const.Program[MESA_SHADER_COMPUTE].MaxAtomicBuffers;
 148    this->Const.MaxCombinedAtomicCounterBuffers =
 149       ctx->Const.MaxCombinedAtomicBuffers;
 150    this->Const.MaxAtomicCounterBufferSize =
 151       ctx->Const.MaxAtomicBufferSize;
 152
 153    /* ARB_enhanced_layouts constants */
 154    this->Const.MaxTransformFeedbackBuffers = ctx->Const.MaxTransformFeedbackBuffers;
 155    this->Const.MaxTransformFeedbackInterleavedComponents = ctx->Const.MaxTransformFeedbackInterleavedComponents;
 156
 157    /* Compute shader constants */
 158    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupCount); i++)
 159       this->Const.MaxComputeWorkGroupCount[i] = ctx->Const.MaxComputeWorkGroupCount[i];
 160    for (unsigned i = 0; i < ARRAY_SIZE(this->Const.MaxComputeWorkGroupSize); i++)
 161       this->Const.MaxComputeWorkGroupSize[i] = ctx->Const.MaxComputeWorkGroupSize[i];
 162
 163    this->Const.MaxComputeTextureImageUnits = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits;
 164    this->Const.MaxComputeUniformComponents = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxUniformComponents;
 165
 166    this->Const.MaxImageUnits = ctx->Const.MaxImageUnits;
 167    this->Const.MaxCombinedShaderOutputResources = ctx->Const.MaxCombinedShaderOutputResources;
 168    this->Const.MaxImageSamples = ctx->Const.MaxImageSamples;
 169    this->Const.MaxVertexImageUniforms = ctx->Const.Program[MESA_SHADER_VERTEX].MaxImageUniforms;
 170    this->Const.MaxTessControlImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms;
 171    this->Const.MaxTessEvaluationImageUniforms = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms;
 172    this->Const.MaxGeometryImageUniforms = ctx->Const.Program[MESA_SHADER_GEOMETRY].MaxImageUniforms;
 173    this->Const.MaxFragmentImageUniforms = ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxImageUniforms;
 174    this->Const.MaxComputeImageUniforms = ctx->Const.Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
 175    this->Const.MaxCombinedImageUniforms = ctx->Const.MaxCombinedImageUniforms;
 176
 177    /* ARB_viewport_array */
 178    this->Const.MaxViewports = ctx->Const.MaxViewports;
 179
 180    /* tessellation shader constants */
 181    this->Const.MaxPatchVertices = ctx->Const.MaxPatchVertices;
 182    this->Const.MaxTessGenLevel = ctx->Const.MaxTessGenLevel;
 183    this->Const.MaxTessControlInputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxInputComponents;
 184    this->Const.MaxTessControlOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxOutputComponents;
 185    this->Const.MaxTessControlTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits;
 186    this->Const.MaxTessEvaluationInputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxInputComponents;
 187    this->Const.MaxTessEvaluationOutputComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxOutputComponents;
 188    this->Const.MaxTessEvaluationTextureImageUnits = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits;
 189    this->Const.MaxTessPatchComponents = ctx->Const.MaxTessPatchComponents;
 190    this->Const.MaxTessControlTotalOutputComponents = ctx->Const.MaxTessControlTotalOutputComponents;
 191    this->Const.MaxTessControlUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_CTRL].MaxUniformComponents;
 192    this->Const.MaxTessEvaluationUniformComponents = ctx->Const.Program[MESA_SHADER_TESS_EVAL].MaxUniformComponents;
 193
 194    /* GL 4.5 / OES_sample_variables */
 195    this->Const.MaxSamples = ctx->Const.MaxSamples;
 196
 197    this->current_function = NULL;
 198    this->toplevel_ir = NULL;
 199    this->found_return = false;
 200    this->all_invariant = false;
 201    this->user_structures = NULL;
 202    this->num_user_structures = 0;
 203    this->num_subroutines = 0;
 204    this->subroutines = NULL;
 205    this->num_subroutine_types = 0;
 206    this->subroutine_types = NULL;
 207
 208    /* supported_versions should be large enough to support the known desktop
 209     * GLSL versions plus 4 GLES versions (ES 1.00, ES 3.00, ES 3.10, ES 3.20)
 210     */
 211    STATIC_ASSERT((ARRAY_SIZE(known_desktop_glsl_versions) + 4) ==
 212                  ARRAY_SIZE(this->supported_versions));
 213
 214    /* Populate the list of supported GLSL versions */
 215    /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
 216     * the OpenGL 3.2 Core context is supported, this logic will need
 217     * change.  Older versions of GLSL are no longer supported
 218     * outside the compatibility contexts of 3.x.
 219     */
 220    this->num_supported_versions = 0;
 221    if (_mesa_is_desktop_gl(ctx)) {
 222       for (unsigned i = 0; i < ARRAY_SIZE(known_desktop_glsl_versions); i++) {
 223          if (known_desktop_glsl_versions[i] <= ctx->Const.GLSLVersion) {
 224             this->supported_versions[this->num_supported_versions].ver
 225                = known_desktop_glsl_versions[i];
 226             this->supported_versions[this->num_supported_versions].gl_ver
 227                = known_desktop_gl_versions[i];
 228             this->supported_versions[this->num_supported_versions].es = false;
 229             this->num_supported_versions++;
 230          }
 231       }
 232    }
 233    if (ctx->API == API_OPENGLES2 || ctx->Extensions.ARB_ES2_compatibility) {
 234       this->supported_versions[this->num_supported_versions].ver = 100;
 235       this->supported_versions[this->num_supported_versions].gl_ver = 20;
 236       this->supported_versions[this->num_supported_versions].es = true;
 237       this->num_supported_versions++;
 238    }
 239    if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
 240       this->supported_versions[this->num_supported_versions].ver = 300;
 241       this->supported_versions[this->num_supported_versions].gl_ver = 30;
 242       this->supported_versions[this->num_supported_versions].es = true;
 243       this->num_supported_versions++;
 244    }
 245    if (_mesa_is_gles31(ctx) || ctx->Extensions.ARB_ES3_1_compatibility) {
 246       this->supported_versions[this->num_supported_versions].ver = 310;
 247       this->supported_versions[this->num_supported_versions].gl_ver = 31;
 248       this->supported_versions[this->num_supported_versions].es = true;
 249       this->num_supported_versions++;
 250    }
 251    if ((ctx->API == API_OPENGLES2 && ctx->Version >= 32) ||
 252        ctx->Extensions.ARB_ES3_2_compatibility) {
 253       this->supported_versions[this->num_supported_versions].ver = 320;
 254       this->supported_versions[this->num_supported_versions].gl_ver = 32;
 255       this->supported_versions[this->num_supported_versions].es = true;
 256       this->num_supported_versions++;
 257    }
 258
 259    /* Create a string for use in error messages to tell the user which GLSL
 260     * versions are supported.
 261     */
 262    char *supported = ralloc_strdup(this, "");
 263    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 264       unsigned ver = this->supported_versions[i].ver;
 265       const char *const prefix = (i == 0)
 266          ? ""
 267          : ((i == this->num_supported_versions - 1) ? ", and " : ", ");
 268       const char *const suffix = (this->supported_versions[i].es) ? " ES" : "";
 269
 270       ralloc_asprintf_append(& supported, "%s%u.%02u%s",
 271                              prefix,
 272                              ver / 100, ver % 100,
 273                              suffix);
 274    }
 275
 276    this->supported_version_string = supported;
 277
 278    if (ctx->Const.ForceGLSLExtensionsWarn)
 279       _mesa_glsl_process_extension("all", NULL, "warn", NULL, this);
 280
 281    this->default_uniform_qualifier = new(this) ast_type_qualifier();
 282    this->default_uniform_qualifier->flags.q.shared = 1;
 283    this->default_uniform_qualifier->flags.q.column_major = 1;
 284
 285    this->default_shader_storage_qualifier = new(this) ast_type_qualifier();
 286    this->default_shader_storage_qualifier->flags.q.shared = 1;
 287    this->default_shader_storage_qualifier->flags.q.column_major = 1;
 288
 289    this->fs_uses_gl_fragcoord = false;
 290    this->fs_redeclares_gl_fragcoord = false;
 291    this->fs_origin_upper_left = false;
 292    this->fs_pixel_center_integer = false;
 293    this->fs_redeclares_gl_fragcoord_with_no_layout_qualifiers = false;
 294
 295    this->gs_input_prim_type_specified = false;
 296    this->tcs_output_vertices_specified = false;
 297    this->gs_input_size = 0;
 298    this->in_qualifier = new(this) ast_type_qualifier();
 299    this->out_qualifier = new(this) ast_type_qualifier();
 300    this->fs_early_fragment_tests = false;
 301    this->fs_inner_coverage = false;
 302    this->fs_post_depth_coverage = false;
 303    this->fs_blend_support = 0;
 304    memset(this->atomic_counter_offsets, 0,
 305           sizeof(this->atomic_counter_offsets));
 306    this->allow_extension_directive_midshader =
 307       ctx->Const.AllowGLSLExtensionDirectiveMidShader;
 308    this->allow_builtin_variable_redeclaration =
 309       ctx->Const.AllowGLSLBuiltinVariableRedeclaration;
 310
 311    this->cs_input_local_size_variable_specified = false;
 312
 313    /* ARB_bindless_texture */
 314    this->bindless_sampler_specified = false;
 315    this->bindless_image_specified = false;
 316    this->bound_sampler_specified = false;
 317    this->bound_image_specified = false;
 318 }
 319
 320 /**
 321  * Determine whether the current GLSL version is sufficiently high to support
 322  * a certain feature, and generate an error message if it isn't.
 323  *
 324  * \param required_glsl_version and \c required_glsl_es_version are
 325  * interpreted as they are in _mesa_glsl_parse_state::is_version().
 326  *
 327  * \param locp is the parser location where the error should be reported.
 328  *
 329  * \param fmt (and additional arguments) constitute a printf-style error
 330  * message to report if the version check fails.  Information about the
 331  * current and required GLSL versions will be appended.  So, for example, if
 332  * the GLSL version being compiled is 1.20, and check_version(130, 300, locp,
 333  * "foo unsupported") is called, the error message will be "foo unsupported in
 334  * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)".
 335  */
 336 bool
 337 _mesa_glsl_parse_state::check_version(unsigned required_glsl_version,
 338                                       unsigned required_glsl_es_version,
 339                                       YYLTYPE *locp, const char *fmt, ...)
 340 {
 341    if (this->is_version(required_glsl_version, required_glsl_es_version))
 342       return true;
 343
 344    va_list args;
 345    va_start(args, fmt);
 346    char *problem = ralloc_vasprintf(this, fmt, args);
 347    va_end(args);
 348    const char *glsl_version_string
 349       = glsl_compute_version_string(this, false, required_glsl_version);
 350    const char *glsl_es_version_string
 351       = glsl_compute_version_string(this, true, required_glsl_es_version);
 352    const char *requirement_string = "";
 353    if (required_glsl_version && required_glsl_es_version) {
 354       requirement_string = ralloc_asprintf(this, " (%s or %s required)",
 355                                            glsl_version_string,
 356                                            glsl_es_version_string);
 357    } else if (required_glsl_version) {
 358       requirement_string = ralloc_asprintf(this, " (%s required)",
 359                                            glsl_version_string);
 360    } else if (required_glsl_es_version) {
 361       requirement_string = ralloc_asprintf(this, " (%s required)",
 362                                            glsl_es_version_string);
 363    }
 364    _mesa_glsl_error(locp, this, "%s in %s%s",
 365                     problem, this->get_version_string(),
 366                     requirement_string);
 367
 368    return false;
 369 }
 370
 371 /**
 372  * Process a GLSL #version directive.
 373  *
 374  * \param version is the integer that follows the #version token.
 375  *
 376  * \param ident is a string identifier that follows the integer, if any is
 377  * present.  Otherwise NULL.
 378  */
 379 void
 380 _mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version,
 381                                                   const char *ident)
 382 {
 383    bool es_token_present = false;
 384    bool compat_token_present = false;
 385    if (ident) {
 386       if (strcmp(ident, "es") == 0) {
 387          es_token_present = true;
 388       } else if (version >= 150) {
 389          if (strcmp(ident, "core") == 0) {
 390             /* Accept the token.  There's no need to record that this is
 391              * a core profile shader since that's the only profile we support.
 392              */
 393          } else if (strcmp(ident, "compatibility") == 0) {
 394             compat_token_present = true;
 395
 396             if (this->ctx->API != API_OPENGL_COMPAT) {
 397                _mesa_glsl_error(locp, this,
 398                                 "the compatibility profile is not supported");
 399             }
 400          } else {
 401             _mesa_glsl_error(locp, this,
 402                              "\"%s\" is not a valid shading language profile; "
 403                              "if present, it must be \"core\"", ident);
 404          }
 405       } else {
 406          _mesa_glsl_error(locp, this,
 407                           "illegal text following version number");
 408       }
 409    }
 410
 411    this->es_shader = es_token_present;
 412    if (version == 100) {
 413       if (es_token_present) {
 414          _mesa_glsl_error(locp, this,
 415                           "GLSL 1.00 ES should be selected using "
 416                           "`#version 100'");
 417       } else {
 418          this->es_shader = true;
 419       }
 420    }
 421
 422    if (this->es_shader) {
 423       this->ARB_texture_rectangle_enable = false;
 424    }
 425
 426    if (this->forced_language_version)
 427       this->language_version = this->forced_language_version;
 428    else
 429       this->language_version = version;
 430
 431    this->compat_shader = compat_token_present ||
 432                          (!this->es_shader && this->language_version < 140);
 433
 434    bool supported = false;
 435    for (unsigned i = 0; i < this->num_supported_versions; i++) {
 436       if (this->supported_versions[i].ver == this->language_version
 437           && this->supported_versions[i].es == this->es_shader) {
 438          this->gl_version = this->supported_versions[i].gl_ver;
 439          supported = true;
 440          break;
 441       }
 442    }
 443
 444    if (!supported) {
 445       _mesa_glsl_error(locp, this, "%s is not supported. "
 446                        "Supported versions are: %s",
 447                        this->get_version_string(),
 448                        this->supported_version_string);
 449
 450       /* On exit, the language_version must be set to a valid value.
 451        * Later calls to _mesa_glsl_initialize_types will misbehave if
 452        * the version is invalid.
 453        */
 454       switch (this->ctx->API) {
 455       case API_OPENGL_COMPAT:
 456       case API_OPENGL_CORE:
 457          this->language_version = this->ctx->Const.GLSLVersion;
 458          break;
 459
 460       case API_OPENGLES:
 461          assert(!"Should not get here.");
 462          /* FALLTHROUGH */
 463
 464       case API_OPENGLES2:
 465          this->language_version = 100;
 466          break;
 467       }
 468    }
 469 }
 470
 471
 472 /* This helper function will append the given message to the shader's
 473    info log and report it via GL_ARB_debug_output. Per that extension,
 474    'type' is one of the enum values classifying the message, and
 475    'id' is the implementation-defined ID of the given message. */
 476 static void
 477 _mesa_glsl_msg(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 478                GLenum type, const char *fmt, va_list ap)
 479 {
 480    bool error = (type == MESA_DEBUG_TYPE_ERROR);
 481    GLuint msg_id = 0;
 482
 483    assert(state->info_log != NULL);
 484
 485    /* Get the offset that the new message will be written to. */
 486    int msg_offset = strlen(state->info_log);
 487
 488    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): %s: ",
 489                                             locp->source,
 490                                             locp->first_line,
 491                                             locp->first_column,
 492                                             error ? "error" : "warning");
 493    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 494
 495    const char *const msg = &state->info_log[msg_offset];
 496    struct gl_context *ctx = state->ctx;
 497
 498    /* Report the error via GL_ARB_debug_output. */
 499    _mesa_shader_debug(ctx, type, &msg_id, msg);
 500
 501    ralloc_strcat(&state->info_log, "\n");
 502 }
 503
 504 void
 505 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 506                  const char *fmt, ...)
 507 {
 508    va_list ap;
 509
 510    state->error = true;
 511
 512    va_start(ap, fmt);
 513    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_ERROR, fmt, ap);
 514    va_end(ap);
 515 }
 516
 517
 518 void
 519 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 520                    const char *fmt, ...)
 521 {
 522    va_list ap;
 523
 524    va_start(ap, fmt);
 525    _mesa_glsl_msg(locp, state, MESA_DEBUG_TYPE_OTHER, fmt, ap);
 526    va_end(ap);
 527 }
 528
 529
 530 /**
 531  * Enum representing the possible behaviors that can be specified in
 532  * an #extension directive.
 533  */
 534 enum ext_behavior {
 535    extension_disable,
 536    extension_enable,
 537    extension_require,
 538    extension_warn
 539 };
 540
 541 /**
 542  * Element type for _mesa_glsl_supported_extensions
 543  */
 544 struct _mesa_glsl_extension {
 545    /**
 546     * Name of the extension when referred to in a GLSL extension
 547     * statement
 548     */
 549    const char *name;
 550
 551    /**
 552     * Whether this extension is a part of AEP
 553     */
 554    bool aep;
 555
 556    /**
 557     * Predicate that checks whether the relevant extension is available for
 558     * this context.
 559     */
 560    bool (*available_pred)(const struct gl_context *,
 561                           gl_api api, uint8_t version);
 562
 563    /**
 564     * Flag in the _mesa_glsl_parse_state struct that should be set
 565     * when this extension is enabled.
 566     *
 567     * See note in _mesa_glsl_extension::supported_flag about "pointer
 568     * to member" types.
 569     */
 570    bool _mesa_glsl_parse_state::* enable_flag;
 571
 572    /**
 573     * Flag in the _mesa_glsl_parse_state struct that should be set
 574     * when the shader requests "warn" behavior for this extension.
 575     *
 576     * See note in _mesa_glsl_extension::supported_flag about "pointer
 577     * to member" types.
 578     */
 579    bool _mesa_glsl_parse_state::* warn_flag;
 580
 581
 582    bool compatible_with_state(const _mesa_glsl_parse_state *state,
 583                               gl_api api, uint8_t gl_version) const;
 584    void set_flags(_mesa_glsl_parse_state *state, ext_behavior behavior) const;
 585 };
 586
 587 /** Checks if the context supports a user-facing extension */
 588 #define EXT(name_str, driver_cap, ...) \
 589 static MAYBE_UNUSED bool \
 590 has_##name_str(const struct gl_context *ctx, gl_api api, uint8_t version) \
 591 { \
 592    return ctx->Extensions.driver_cap && (version >= \
 593           _mesa_extension_table[MESA_EXTENSION_##name_str].version[api]); \
 594 }
 595 #include "main/extensions_table.h"
 596 #undef EXT
 597
 598 #define EXT(NAME)                                           \
 599    { "GL_" #NAME, false, has_##NAME,                        \
 600      &_mesa_glsl_parse_state::NAME##_enable,                \
 601      &_mesa_glsl_parse_state::NAME##_warn }
 602
 603 #define EXT_AEP(NAME)                                       \
 604    { "GL_" #NAME, true, has_##NAME,                         \
 605      &_mesa_glsl_parse_state::NAME##_enable,                \
 606      &_mesa_glsl_parse_state::NAME##_warn }
 607
 608 /**
 609  * Table of extensions that can be enabled/disabled within a shader,
 610  * and the conditions under which they are supported.
 611  */
 612 static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
 613    /* ARB extensions go here, sorted alphabetically.
 614     */
 615    EXT(ARB_ES3_1_compatibility),
 616    EXT(ARB_ES3_2_compatibility),
 617    EXT(ARB_arrays_of_arrays),
 618    EXT(ARB_bindless_texture),
 619    EXT(ARB_compute_shader),
 620    EXT(ARB_compute_variable_group_size),
 621    EXT(ARB_conservative_depth),
 622    EXT(ARB_cull_distance),
 623    EXT(ARB_derivative_control),
 624    EXT(ARB_draw_buffers),
 625    EXT(ARB_draw_instanced),
 626    EXT(ARB_enhanced_layouts),
 627    EXT(ARB_explicit_attrib_location),
 628    EXT(ARB_explicit_uniform_location),
 629    EXT(ARB_fragment_coord_conventions),
 630    EXT(ARB_fragment_layer_viewport),
 631    EXT(ARB_gpu_shader5),
 632    EXT(ARB_gpu_shader_fp64),
 633    EXT(ARB_gpu_shader_int64),
 634    EXT(ARB_post_depth_coverage),
 635    EXT(ARB_sample_shading),
 636    EXT(ARB_separate_shader_objects),
 637    EXT(ARB_shader_atomic_counter_ops),
 638    EXT(ARB_shader_atomic_counters),
 639    EXT(ARB_shader_ballot),
 640    EXT(ARB_shader_bit_encoding),
 641    EXT(ARB_shader_clock),
 642    EXT(ARB_shader_draw_parameters),
 643    EXT(ARB_shader_group_vote),
 644    EXT(ARB_shader_image_load_store),
 645    EXT(ARB_shader_image_size),
 646    EXT(ARB_shader_precision),
 647    EXT(ARB_shader_stencil_export),
 648    EXT(ARB_shader_storage_buffer_object),
 649    EXT(ARB_shader_subroutine),
 650    EXT(ARB_shader_texture_image_samples),
 651    EXT(ARB_shader_texture_lod),
 652    EXT(ARB_shader_viewport_layer_array),
 653    EXT(ARB_shading_language_420pack),
 654    EXT(ARB_shading_language_packing),
 655    EXT(ARB_tessellation_shader),
 656    EXT(ARB_texture_cube_map_array),
 657    EXT(ARB_texture_gather),
 658    EXT(ARB_texture_multisample),
 659    EXT(ARB_texture_query_levels),
 660    EXT(ARB_texture_query_lod),
 661    EXT(ARB_texture_rectangle),
 662    EXT(ARB_uniform_buffer_object),
 663    EXT(ARB_vertex_attrib_64bit),
 664    EXT(ARB_viewport_array),
 665
 666    /* KHR extensions go here, sorted alphabetically.
 667     */
 668    EXT_AEP(KHR_blend_equation_advanced),
 669
 670    /* OES extensions go here, sorted alphabetically.
 671     */
 672    EXT(OES_EGL_image_external),
 673    EXT(OES_EGL_image_external_essl3),
 674    EXT(OES_geometry_point_size),
 675    EXT(OES_geometry_shader),
 676    EXT(OES_gpu_shader5),
 677    EXT(OES_primitive_bounding_box),
 678    EXT_AEP(OES_sample_variables),
 679    EXT_AEP(OES_shader_image_atomic),
 680    EXT(OES_shader_io_blocks),
 681    EXT_AEP(OES_shader_multisample_interpolation),
 682    EXT(OES_standard_derivatives),
 683    EXT(OES_tessellation_point_size),
 684    EXT(OES_tessellation_shader),
 685    EXT(OES_texture_3D),
 686    EXT(OES_texture_buffer),
 687    EXT(OES_texture_cube_map_array),
 688    EXT_AEP(OES_texture_storage_multisample_2d_array),
 689    EXT(OES_viewport_array),
 690
 691    /* All other extensions go here, sorted alphabetically.
 692     */
 693    EXT(AMD_conservative_depth),
 694    EXT(AMD_shader_stencil_export),
 695    EXT(AMD_shader_trinary_minmax),
 696    EXT(AMD_vertex_shader_layer),
 697    EXT(AMD_vertex_shader_viewport_index),
 698    EXT(ANDROID_extension_pack_es31a),
 699    EXT(EXT_blend_func_extended),
 700    EXT(EXT_frag_depth),
 701    EXT(EXT_draw_buffers),
 702    EXT(EXT_clip_cull_distance),
 703    EXT(EXT_geometry_point_size),
 704    EXT_AEP(EXT_geometry_shader),
 705    EXT_AEP(EXT_gpu_shader5),
 706    EXT_AEP(EXT_primitive_bounding_box),
 707    EXT(EXT_separate_shader_objects),
 708    EXT(EXT_shader_framebuffer_fetch),
 709    EXT(EXT_shader_integer_mix),
 710    EXT_AEP(EXT_shader_io_blocks),
 711    EXT(EXT_shader_samples_identical),
 712    EXT(EXT_tessellation_point_size),
 713    EXT_AEP(EXT_tessellation_shader),
 714    EXT(EXT_texture_array),
 715    EXT_AEP(EXT_texture_buffer),
 716    EXT_AEP(EXT_texture_cube_map_array),
 717    EXT(INTEL_conservative_rasterization),
 718    EXT(MESA_shader_integer_functions),
 719    EXT(NV_image_formats),
 720 };
 721
 722 #undef EXT
 723
 724
 725 /**
 726  * Determine whether a given extension is compatible with the target,
 727  * API, and extension information in the current parser state.
 728  */
 729 bool _mesa_glsl_extension::compatible_with_state(
 730       const _mesa_glsl_parse_state *state, gl_api api, uint8_t gl_version) const
 731 {
 732    return this->available_pred(state->ctx, api, gl_version);
 733 }
 734
 735 /**
 736  * Set the appropriate flags in the parser state to establish the
 737  * given behavior for this extension.
 738  */
 739 void _mesa_glsl_extension::set_flags(_mesa_glsl_parse_state *state,
 740                                      ext_behavior behavior) const
 741 {
 742    /* Note: the ->* operator indexes into state by the
 743     * offsets this->enable_flag and this->warn_flag.  See
 744     * _mesa_glsl_extension::supported_flag for more info.
 745     */
 746    state->*(this->enable_flag) = (behavior != extension_disable);
 747    state->*(this->warn_flag)   = (behavior == extension_warn);
 748 }
 749
 750 /**
 751  * Find an extension by name in _mesa_glsl_supported_extensions.  If
 752  * the name is not found, return NULL.
 753  */
 754 static const _mesa_glsl_extension *find_extension(const char *name)
 755 {
 756    for (unsigned i = 0; i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 757       if (strcmp(name, _mesa_glsl_supported_extensions[i].name) == 0) {
 758          return &_mesa_glsl_supported_extensions[i];
 759       }
 760    }
 761    return NULL;
 762 }
 763
 764 bool
 765 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 766                              const char *behavior_string, YYLTYPE *behavior_locp,
 767                              _mesa_glsl_parse_state *state)
 768 {
 769    uint8_t gl_version = state->ctx->Extensions.Version;
 770    gl_api api = state->ctx->API;
 771    ext_behavior behavior;
 772    if (strcmp(behavior_string, "warn") == 0) {
 773       behavior = extension_warn;
 774    } else if (strcmp(behavior_string, "require") == 0) {
 775       behavior = extension_require;
 776    } else if (strcmp(behavior_string, "enable") == 0) {
 777       behavior = extension_enable;
 778    } else if (strcmp(behavior_string, "disable") == 0) {
 779       behavior = extension_disable;
 780    } else {
 781       _mesa_glsl_error(behavior_locp, state,
 782                        "unknown extension behavior `%s'",
 783                        behavior_string);
 784       return false;
 785    }
 786
 787    /* If we're in a desktop context but with an ES shader, use an ES API enum
 788     * to verify extension availability.
 789     */
 790    if (state->es_shader && api != API_OPENGLES2)
 791       api = API_OPENGLES2;
 792    /* Use the language-version derived GL version to extension checks, unless
 793     * we're using meta, which sets the version to the max.
 794     */
 795    if (gl_version != 0xff)
 796       gl_version = state->gl_version;
 797
 798    if (strcmp(name, "all") == 0) {
 799       if ((behavior == extension_enable) || (behavior == extension_require)) {
 800          _mesa_glsl_error(name_locp, state, "cannot %s all extensions",
 801                           (behavior == extension_enable)
 802                           ? "enable" : "require");
 803          return false;
 804       } else {
 805          for (unsigned i = 0;
 806               i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 807             const _mesa_glsl_extension *extension
 808                = &_mesa_glsl_supported_extensions[i];
 809             if (extension->compatible_with_state(state, api, gl_version)) {
 810                _mesa_glsl_supported_extensions[i].set_flags(state, behavior);
 811             }
 812          }
 813       }
 814    } else {
 815       const _mesa_glsl_extension *extension = find_extension(name);
 816       if (extension && extension->compatible_with_state(state, api, gl_version)) {
 817          extension->set_flags(state, behavior);
 818          if (extension->available_pred == has_ANDROID_extension_pack_es31a) {
 819             for (unsigned i = 0;
 820                  i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
 821                const _mesa_glsl_extension *extension =
 822                   &_mesa_glsl_supported_extensions[i];
 823
 824                if (!extension->aep)
 825                   continue;
 826                /* AEP should not be enabled if all of the sub-extensions can't
 827                 * also be enabled. This is not the proper layer to do such
 828                 * error-checking though.
 829                 */
 830                assert(extension->compatible_with_state(state, api, gl_version));
 831                extension->set_flags(state, behavior);
 832             }
 833          }
 834       } else {
 835          static const char fmt[] = "extension `%s' unsupported in %s shader";
 836
 837          if (behavior == extension_require) {
 838             _mesa_glsl_error(name_locp, state, fmt,
 839                              name, _mesa_shader_stage_to_string(state->stage));
 840             return false;
 841          } else {
 842             _mesa_glsl_warning(name_locp, state, fmt,
 843                                name, _mesa_shader_stage_to_string(state->stage));
 844          }
 845       }
 846    }
 847
 848    return true;
 849 }
 850
 851
 852 /**
 853  * Recurses through <type> and <expr> if <expr> is an aggregate initializer
 854  * and sets <expr>'s <constructor_type> field to <type>. Gives later functions
 855  * (process_array_constructor, et al) sufficient information to do type
 856  * checking.
 857  *
 858  * Operates on assignments involving an aggregate initializer. E.g.,
 859  *
 860  * vec4 pos = {1.0, -1.0, 0.0, 1.0};
 861  *
 862  * or more ridiculously,
 863  *
 864  * struct S {
 865  *     vec4 v[2];
 866  * };
 867  *
 868  * struct {
 869  *     S a[2], b;
 870  *     int c;
 871  * } aggregate = {
 872  *     {
 873  *         {
 874  *             {
 875  *                 {1.0, 2.0, 3.0, 4.0}, // a[0].v[0]
 876  *                 {5.0, 6.0, 7.0, 8.0}  // a[0].v[1]
 877  *             } // a[0].v
 878  *         }, // a[0]
 879  *         {
 880  *             {
 881  *                 {1.0, 2.0, 3.0, 4.0}, // a[1].v[0]
 882  *                 {5.0, 6.0, 7.0, 8.0}  // a[1].v[1]
 883  *             } // a[1].v
 884  *         } // a[1]
 885  *     }, // a
 886  *     {
 887  *         {
 888  *             {1.0, 2.0, 3.0, 4.0}, // b.v[0]
 889  *             {5.0, 6.0, 7.0, 8.0}  // b.v[1]
 890  *         } // b.v
 891  *     }, // b
 892  *     4 // c
 893  * };
 894  *
 895  * This pass is necessary because the right-hand side of <type> e = { ... }
 896  * doesn't contain sufficient information to determine if the types match.
 897  */
 898 void
 899 _mesa_ast_set_aggregate_type(const glsl_type *type,
 900                              ast_expression *expr)
 901 {
 902    ast_aggregate_initializer *ai = (ast_aggregate_initializer *)expr;
 903    ai->constructor_type = type;
 904
 905    /* If the aggregate is an array, recursively set its elements' types. */
 906    if (type->is_array()) {
 907       /* Each array element has the type type->fields.array.
 908        *
 909        * E.g., if <type> if struct S[2] we want to set each element's type to
 910        * struct S.
 911        */
 912       for (exec_node *expr_node = ai->expressions.get_head_raw();
 913            !expr_node->is_tail_sentinel();
 914            expr_node = expr_node->next) {
 915          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 916                                                link);
 917
 918          if (expr->oper == ast_aggregate)
 919             _mesa_ast_set_aggregate_type(type->fields.array, expr);
 920       }
 921
 922    /* If the aggregate is a struct, recursively set its fields' types. */
 923    } else if (type->is_record()) {
 924       exec_node *expr_node = ai->expressions.get_head_raw();
 925
 926       /* Iterate through the struct's fields. */
 927       for (unsigned i = 0; !expr_node->is_tail_sentinel() && i < type->length;
 928            i++, expr_node = expr_node->next) {
 929          ast_expression *expr = exec_node_data(ast_expression, expr_node,
 930                                                link);
 931
 932          if (expr->oper == ast_aggregate) {
 933             _mesa_ast_set_aggregate_type(type->fields.structure[i].type, expr);
 934          }
 935       }
 936    /* If the aggregate is a matrix, set its columns' types. */
 937    } else if (type->is_matrix()) {
 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->column_type(), expr);
 946       }
 947    }
 948 }
 949
 950 void
 951 _mesa_ast_process_interface_block(YYLTYPE *locp,
 952                                   _mesa_glsl_parse_state *state,
 953                                   ast_interface_block *const block,
 954                                   const struct ast_type_qualifier &q)
 955 {
 956    if (q.flags.q.buffer) {
 957       if (!state->has_shader_storage_buffer_objects()) {
 958          _mesa_glsl_error(locp, state,
 959                           "#version 430 / GL_ARB_shader_storage_buffer_object "
 960                           "required for defining shader storage blocks");
 961       } else if (state->ARB_shader_storage_buffer_object_warn) {
 962          _mesa_glsl_warning(locp, state,
 963                             "#version 430 / GL_ARB_shader_storage_buffer_object "
 964                             "required for defining shader storage blocks");
 965       }
 966    } else if (q.flags.q.uniform) {
 967       if (!state->has_uniform_buffer_objects()) {
 968          _mesa_glsl_error(locp, state,
 969                           "#version 140 / GL_ARB_uniform_buffer_object "
 970                           "required for defining uniform blocks");
 971       } else if (state->ARB_uniform_buffer_object_warn) {
 972          _mesa_glsl_warning(locp, state,
 973                             "#version 140 / GL_ARB_uniform_buffer_object "
 974                             "required for defining uniform blocks");
 975       }
 976    } else {
 977       if (!state->has_shader_io_blocks()) {
 978          if (state->es_shader) {
 979             _mesa_glsl_error(locp, state,
 980                              "GL_OES_shader_io_blocks or #version 320 "
 981                              "required for using interface blocks");
 982          } else {
 983             _mesa_glsl_error(locp, state,
 984                              "#version 150 required for using "
 985                              "interface blocks");
 986          }
 987       }
 988    }
 989
 990    /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
 991     * "It is illegal to have an input block in a vertex shader
 992     *  or an output block in a fragment shader"
 993     */
 994    if ((state->stage == MESA_SHADER_VERTEX) && q.flags.q.in) {
 995       _mesa_glsl_error(locp, state,
 996                        "`in' interface block is not allowed for "
 997                        "a vertex shader");
 998    } else if ((state->stage == MESA_SHADER_FRAGMENT) && q.flags.q.out) {
 999       _mesa_glsl_error(locp, state,
1000                        "`out' interface block is not allowed for "
1001                        "a fragment shader");
1002    }
1003
1004    /* Since block arrays require names, and both features are added in
1005     * the same language versions, we don't have to explicitly
1006     * version-check both things.
1007     */
1008    if (block->instance_name != NULL) {
1009       state->check_version(150, 300, locp, "interface blocks with "
1010                            "an instance name are not allowed");
1011    }
1012
1013    uint64_t interface_type_mask;
1014    struct ast_type_qualifier temp_type_qualifier;
1015
1016    /* Get a bitmask containing only the in/out/uniform/buffer
1017     * flags, allowing us to ignore other irrelevant flags like
1018     * interpolation qualifiers.
1019     */
1020    temp_type_qualifier.flags.i = 0;
1021    temp_type_qualifier.flags.q.uniform = true;
1022    temp_type_qualifier.flags.q.in = true;
1023    temp_type_qualifier.flags.q.out = true;
1024    temp_type_qualifier.flags.q.buffer = true;
1025    temp_type_qualifier.flags.q.patch = true;
1026    interface_type_mask = temp_type_qualifier.flags.i;
1027
1028    /* Get the block's interface qualifier.  The interface_qualifier
1029     * production rule guarantees that only one bit will be set (and
1030     * it will be in/out/uniform).
1031     */
1032    uint64_t block_interface_qualifier = q.flags.i;
1033
1034    block->default_layout.flags.i |= block_interface_qualifier;
1035
1036    if (state->stage == MESA_SHADER_GEOMETRY &&
1037        state->has_explicit_attrib_stream() &&
1038        block->default_layout.flags.q.out) {
1039       /* Assign global layout's stream value. */
1040       block->default_layout.flags.q.stream = 1;
1041       block->default_layout.flags.q.explicit_stream = 0;
1042       block->default_layout.stream = state->out_qualifier->stream;
1043    }
1044
1045    if (state->has_enhanced_layouts() && block->default_layout.flags.q.out) {
1046       /* Assign global layout's xfb_buffer value. */
1047       block->default_layout.flags.q.xfb_buffer = 1;
1048       block->default_layout.flags.q.explicit_xfb_buffer = 0;
1049       block->default_layout.xfb_buffer = state->out_qualifier->xfb_buffer;
1050    }
1051
1052    foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
1053       ast_type_qualifier& qualifier = member->type->qualifier;
1054       if ((qualifier.flags.i & interface_type_mask) == 0) {
1055          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1056           * "If no optional qualifier is used in a member declaration, the
1057           *  qualifier of the variable is just in, out, or uniform as declared
1058           *  by interface-qualifier."
1059           */
1060          qualifier.flags.i |= block_interface_qualifier;
1061       } else if ((qualifier.flags.i & interface_type_mask) !=
1062                  block_interface_qualifier) {
1063          /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
1064           * "If optional qualifiers are used, they can include interpolation
1065           *  and storage qualifiers and they must declare an input, output,
1066           *  or uniform variable consistent with the interface qualifier of
1067           *  the block."
1068           */
1069          _mesa_glsl_error(locp, state,
1070                           "uniform/in/out qualifier on "
1071                           "interface block member does not match "
1072                           "the interface block");
1073       }
1074
1075       if (!(q.flags.q.in || q.flags.q.out) && qualifier.flags.q.invariant)
1076          _mesa_glsl_error(locp, state,
1077                           "invariant qualifiers can be used only "
1078                           "in interface block members for shader "
1079                           "inputs or outputs");
1080    }
1081 }
1082
1083 static void
1084 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
1085 {
1086    if (q->is_subroutine_decl())
1087       printf("subroutine ");
1088
1089    if (q->subroutine_list) {
1090       printf("subroutine (");
1091       q->subroutine_list->print();
1092       printf(")");
1093    }
1094
1095    if (q->flags.q.constant)
1096       printf("const ");
1097
1098    if (q->flags.q.invariant)
1099       printf("invariant ");
1100
1101    if (q->flags.q.attribute)
1102       printf("attribute ");
1103
1104    if (q->flags.q.varying)
1105       printf("varying ");
1106
1107    if (q->flags.q.in && q->flags.q.out)
1108       printf("inout ");
1109    else {
1110       if (q->flags.q.in)
1111          printf("in ");
1112
1113       if (q->flags.q.out)
1114          printf("out ");
1115    }
1116
1117    if (q->flags.q.centroid)
1118       printf("centroid ");
1119    if (q->flags.q.sample)
1120       printf("sample ");
1121    if (q->flags.q.patch)
1122       printf("patch ");
1123    if (q->flags.q.uniform)
1124       printf("uniform ");
1125    if (q->flags.q.buffer)
1126       printf("buffer ");
1127    if (q->flags.q.smooth)
1128       printf("smooth ");
1129    if (q->flags.q.flat)
1130       printf("flat ");
1131    if (q->flags.q.noperspective)
1132       printf("noperspective ");
1133 }
1134
1135
1136 void
1137 ast_node::print(void) const
1138 {
1139    printf("unhandled node ");
1140 }
1141
1142
1143 ast_node::ast_node(void)
1144 {
1145    this->location.source = 0;
1146    this->location.first_line = 0;
1147    this->location.first_column = 0;
1148    this->location.last_line = 0;
1149    this->location.last_column = 0;
1150 }
1151
1152
1153 static void
1154 ast_opt_array_dimensions_print(const ast_array_specifier *array_specifier)
1155 {
1156    if (array_specifier)
1157       array_specifier->print();
1158 }
1159
1160
1161 void
1162 ast_compound_statement::print(void) const
1163 {
1164    printf("{\n");
1165
1166    foreach_list_typed(ast_node, ast, link, &this->statements) {
1167       ast->print();
1168    }
1169
1170    printf("}\n");
1171 }
1172
1173
1174 ast_compound_statement::ast_compound_statement(int new_scope,
1175                                                ast_node *statements)
1176 {
1177    this->new_scope = new_scope;
1178
1179    if (statements != NULL) {
1180       this->statements.push_degenerate_list_at_head(&statements->link);
1181    }
1182 }
1183
1184
1185 void
1186 ast_expression::print(void) const
1187 {
1188    switch (oper) {
1189    case ast_assign:
1190    case ast_mul_assign:
1191    case ast_div_assign:
1192    case ast_mod_assign:
1193    case ast_add_assign:
1194    case ast_sub_assign:
1195    case ast_ls_assign:
1196    case ast_rs_assign:
1197    case ast_and_assign:
1198    case ast_xor_assign:
1199    case ast_or_assign:
1200       subexpressions[0]->print();
1201       printf("%s ", operator_string(oper));
1202       subexpressions[1]->print();
1203       break;
1204
1205    case ast_field_selection:
1206       subexpressions[0]->print();
1207       printf(". %s ", primary_expression.identifier);
1208       break;
1209
1210    case ast_plus:
1211    case ast_neg:
1212    case ast_bit_not:
1213    case ast_logic_not:
1214    case ast_pre_inc:
1215    case ast_pre_dec:
1216       printf("%s ", operator_string(oper));
1217       subexpressions[0]->print();
1218       break;
1219
1220    case ast_post_inc:
1221    case ast_post_dec:
1222       subexpressions[0]->print();
1223       printf("%s ", operator_string(oper));
1224       break;
1225
1226    case ast_conditional:
1227       subexpressions[0]->print();
1228       printf("? ");
1229       subexpressions[1]->print();
1230       printf(": ");
1231       subexpressions[2]->print();
1232       break;
1233
1234    case ast_array_index:
1235       subexpressions[0]->print();
1236       printf("[ ");
1237       subexpressions[1]->print();
1238       printf("] ");
1239       break;
1240
1241    case ast_function_call: {
1242       subexpressions[0]->print();
1243       printf("( ");
1244
1245       foreach_list_typed (ast_node, ast, link, &this->expressions) {
1246          if (&ast->link != this->expressions.get_head())
1247             printf(", ");
1248
1249          ast->print();
1250       }
1251
1252       printf(") ");
1253       break;
1254    }
1255
1256    case ast_identifier:
1257       printf("%s ", primary_expression.identifier);
1258       break;
1259
1260    case ast_int_constant:
1261       printf("%d ", primary_expression.int_constant);
1262       break;
1263
1264    case ast_uint_constant:
1265       printf("%u ", primary_expression.uint_constant);
1266       break;
1267
1268    case ast_float_constant:
1269       printf("%f ", primary_expression.float_constant);
1270       break;
1271
1272    case ast_double_constant:
1273       printf("%f ", primary_expression.double_constant);
1274       break;
1275
1276    case ast_int64_constant:
1277       printf("%" PRId64 " ", primary_expression.int64_constant);
1278       break;
1279
1280    case ast_uint64_constant:
1281       printf("%" PRIu64 " ", primary_expression.uint64_constant);
1282       break;
1283
1284    case ast_bool_constant:
1285       printf("%s ",
1286              primary_expression.bool_constant
1287              ? "true" : "false");
1288       break;
1289
1290    case ast_sequence: {
1291       printf("( ");
1292       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1293          if (&ast->link != this->expressions.get_head())
1294             printf(", ");
1295
1296          ast->print();
1297       }
1298       printf(") ");
1299       break;
1300    }
1301
1302    case ast_aggregate: {
1303       printf("{ ");
1304       foreach_list_typed (ast_node, ast, link, & this->expressions) {
1305          if (&ast->link != this->expressions.get_head())
1306             printf(", ");
1307
1308          ast->print();
1309       }
1310       printf("} ");
1311       break;
1312    }
1313
1314    default:
1315       assert(0);
1316       break;
1317    }
1318 }
1319
1320 ast_expression::ast_expression(int oper,
1321                                ast_expression *ex0,
1322                                ast_expression *ex1,
1323                                ast_expression *ex2) :
1324    primary_expression()
1325 {
1326    this->oper = ast_operators(oper);
1327    this->subexpressions[0] = ex0;
1328    this->subexpressions[1] = ex1;
1329    this->subexpressions[2] = ex2;
1330    this->non_lvalue_description = NULL;
1331    this->is_lhs = false;
1332 }
1333
1334
1335 void
1336 ast_expression_statement::print(void) const
1337 {
1338    if (expression)
1339       expression->print();
1340
1341    printf("; ");
1342 }
1343
1344
1345 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
1346    expression(ex)
1347 {
1348    /* empty */
1349 }
1350
1351
1352 void
1353 ast_function::print(void) const
1354 {
1355    return_type->print();
1356    printf(" %s (", identifier);
1357
1358    foreach_list_typed(ast_node, ast, link, & this->parameters) {
1359       ast->print();
1360    }
1361
1362    printf(")");
1363 }
1364
1365
1366 ast_function::ast_function(void)
1367    : return_type(NULL), identifier(NULL), is_definition(false),
1368      signature(NULL)
1369 {
1370    /* empty */
1371 }
1372
1373
1374 void
1375 ast_fully_specified_type::print(void) const
1376 {
1377    _mesa_ast_type_qualifier_print(& qualifier);
1378    specifier->print();
1379 }
1380
1381
1382 void
1383 ast_parameter_declarator::print(void) const
1384 {
1385    type->print();
1386    if (identifier)
1387       printf("%s ", identifier);
1388    ast_opt_array_dimensions_print(array_specifier);
1389 }
1390
1391
1392 void
1393 ast_function_definition::print(void) const
1394 {
1395    prototype->print();
1396    body->print();
1397 }
1398
1399
1400 void
1401 ast_declaration::print(void) const
1402 {
1403    printf("%s ", identifier);
1404    ast_opt_array_dimensions_print(array_specifier);
1405
1406    if (initializer) {
1407       printf("= ");
1408       initializer->print();
1409    }
1410 }
1411
1412
1413 ast_declaration::ast_declaration(const char *identifier,
1414                                  ast_array_specifier *array_specifier,
1415                                  ast_expression *initializer)
1416 {
1417    this->identifier = identifier;
1418    this->array_specifier = array_specifier;
1419    this->initializer = initializer;
1420 }
1421
1422
1423 void
1424 ast_declarator_list::print(void) const
1425 {
1426    assert(type || invariant);
1427
1428    if (type)
1429       type->print();
1430    else if (invariant)
1431       printf("invariant ");
1432    else
1433       printf("precise ");
1434
1435    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1436       if (&ast->link != this->declarations.get_head())
1437          printf(", ");
1438
1439       ast->print();
1440    }
1441
1442    printf("; ");
1443 }
1444
1445
1446 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
1447 {
1448    this->type = type;
1449    this->invariant = false;
1450    this->precise = false;
1451 }
1452
1453 void
1454 ast_jump_statement::print(void) const
1455 {
1456    switch (mode) {
1457    case ast_continue:
1458       printf("continue; ");
1459       break;
1460    case ast_break:
1461       printf("break; ");
1462       break;
1463    case ast_return:
1464       printf("return ");
1465       if (opt_return_value)
1466          opt_return_value->print();
1467
1468       printf("; ");
1469       break;
1470    case ast_discard:
1471       printf("discard; ");
1472       break;
1473    }
1474 }
1475
1476
1477 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
1478    : opt_return_value(NULL)
1479 {
1480    this->mode = ast_jump_modes(mode);
1481
1482    if (mode == ast_return)
1483       opt_return_value = return_value;
1484 }
1485
1486
1487 void
1488 ast_selection_statement::print(void) const
1489 {
1490    printf("if ( ");
1491    condition->print();
1492    printf(") ");
1493
1494    then_statement->print();
1495
1496    if (else_statement) {
1497       printf("else ");
1498       else_statement->print();
1499    }
1500 }
1501
1502
1503 ast_selection_statement::ast_selection_statement(ast_expression *condition,
1504                                                  ast_node *then_statement,
1505                                                  ast_node *else_statement)
1506 {
1507    this->condition = condition;
1508    this->then_statement = then_statement;
1509    this->else_statement = else_statement;
1510 }
1511
1512
1513 void
1514 ast_switch_statement::print(void) const
1515 {
1516    printf("switch ( ");
1517    test_expression->print();
1518    printf(") ");
1519
1520    body->print();
1521 }
1522
1523
1524 ast_switch_statement::ast_switch_statement(ast_expression *test_expression,
1525                                            ast_node *body)
1526 {
1527    this->test_expression = test_expression;
1528    this->body = body;
1529 }
1530
1531
1532 void
1533 ast_switch_body::print(void) const
1534 {
1535    printf("{\n");
1536    if (stmts != NULL) {
1537       stmts->print();
1538    }
1539    printf("}\n");
1540 }
1541
1542
1543 ast_switch_body::ast_switch_body(ast_case_statement_list *stmts)
1544 {
1545    this->stmts = stmts;
1546 }
1547
1548
1549 void ast_case_label::print(void) const
1550 {
1551    if (test_value != NULL) {
1552       printf("case ");
1553       test_value->print();
1554       printf(": ");
1555    } else {
1556       printf("default: ");
1557    }
1558 }
1559
1560
1561 ast_case_label::ast_case_label(ast_expression *test_value)
1562 {
1563    this->test_value = test_value;
1564 }
1565
1566
1567 void ast_case_label_list::print(void) const
1568 {
1569    foreach_list_typed(ast_node, ast, link, & this->labels) {
1570       ast->print();
1571    }
1572    printf("\n");
1573 }
1574
1575
1576 ast_case_label_list::ast_case_label_list(void)
1577 {
1578 }
1579
1580
1581 void ast_case_statement::print(void) const
1582 {
1583    labels->print();
1584    foreach_list_typed(ast_node, ast, link, & this->stmts) {
1585       ast->print();
1586       printf("\n");
1587    }
1588 }
1589
1590
1591 ast_case_statement::ast_case_statement(ast_case_label_list *labels)
1592 {
1593    this->labels = labels;
1594 }
1595
1596
1597 void ast_case_statement_list::print(void) const
1598 {
1599    foreach_list_typed(ast_node, ast, link, & this->cases) {
1600       ast->print();
1601    }
1602 }
1603
1604
1605 ast_case_statement_list::ast_case_statement_list(void)
1606 {
1607 }
1608
1609
1610 void
1611 ast_iteration_statement::print(void) const
1612 {
1613    switch (mode) {
1614    case ast_for:
1615       printf("for( ");
1616       if (init_statement)
1617          init_statement->print();
1618       printf("; ");
1619
1620       if (condition)
1621          condition->print();
1622       printf("; ");
1623
1624       if (rest_expression)
1625          rest_expression->print();
1626       printf(") ");
1627
1628       body->print();
1629       break;
1630
1631    case ast_while:
1632       printf("while ( ");
1633       if (condition)
1634          condition->print();
1635       printf(") ");
1636       body->print();
1637       break;
1638
1639    case ast_do_while:
1640       printf("do ");
1641       body->print();
1642       printf("while ( ");
1643       if (condition)
1644          condition->print();
1645       printf("); ");
1646       break;
1647    }
1648 }
1649
1650
1651 ast_iteration_statement::ast_iteration_statement(int mode,
1652                                                  ast_node *init,
1653                                                  ast_node *condition,
1654                                                  ast_expression *rest_expression,
1655                                                  ast_node *body)
1656 {
1657    this->mode = ast_iteration_modes(mode);
1658    this->init_statement = init;
1659    this->condition = condition;
1660    this->rest_expression = rest_expression;
1661    this->body = body;
1662 }
1663
1664
1665 void
1666 ast_struct_specifier::print(void) const
1667 {
1668    printf("struct %s { ", name);
1669    foreach_list_typed(ast_node, ast, link, &this->declarations) {
1670       ast->print();
1671    }
1672    printf("} ");
1673 }
1674
1675
1676 ast_struct_specifier::ast_struct_specifier(const char *identifier,
1677                                            ast_declarator_list *declarator_list)
1678    : name(identifier), layout(NULL), declarations(), is_declaration(true),
1679      type(NULL)
1680 {
1681    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
1682 }
1683
1684 void ast_subroutine_list::print(void) const
1685 {
1686    foreach_list_typed (ast_node, ast, link, & this->declarations) {
1687       if (&ast->link != this->declarations.get_head())
1688          printf(", ");
1689       ast->print();
1690    }
1691 }
1692
1693 static void
1694 set_shader_inout_layout(struct gl_shader *shader,
1695                      struct _mesa_glsl_parse_state *state)
1696 {
1697    /* Should have been prevented by the parser. */
1698    if (shader->Stage == MESA_SHADER_TESS_CTRL ||
1699        shader->Stage == MESA_SHADER_VERTEX) {
1700       assert(!state->in_qualifier->flags.i);
1701    } else if (shader->Stage != MESA_SHADER_GEOMETRY &&
1702               shader->Stage != MESA_SHADER_TESS_EVAL) {
1703       assert(!state->in_qualifier->flags.i);
1704    }
1705
1706    if (shader->Stage != MESA_SHADER_COMPUTE) {
1707       /* Should have been prevented by the parser. */
1708       assert(!state->cs_input_local_size_specified);
1709       assert(!state->cs_input_local_size_variable_specified);
1710    }
1711
1712    if (shader->Stage != MESA_SHADER_FRAGMENT) {
1713       /* Should have been prevented by the parser. */
1714       assert(!state->fs_uses_gl_fragcoord);
1715       assert(!state->fs_redeclares_gl_fragcoord);
1716       assert(!state->fs_pixel_center_integer);
1717       assert(!state->fs_origin_upper_left);
1718       assert(!state->fs_early_fragment_tests);
1719       assert(!state->fs_inner_coverage);
1720       assert(!state->fs_post_depth_coverage);
1721    }
1722
1723    for (unsigned i = 0; i < MAX_FEEDBACK_BUFFERS; i++) {
1724       if (state->out_qualifier->out_xfb_stride[i]) {
1725          unsigned xfb_stride;
1726          if (state->out_qualifier->out_xfb_stride[i]->
1727                 process_qualifier_constant(state, "xfb_stride", &xfb_stride,
1728                 true)) {
1729             shader->TransformFeedbackBufferStride[i] = xfb_stride;
1730          }
1731       }
1732    }
1733
1734    switch (shader->Stage) {
1735    case MESA_SHADER_TESS_CTRL:
1736       shader->info.TessCtrl.VerticesOut = 0;
1737       if (state->tcs_output_vertices_specified) {
1738          unsigned vertices;
1739          if (state->out_qualifier->vertices->
1740                process_qualifier_constant(state, "vertices", &vertices,
1741                                           false)) {
1742
1743             YYLTYPE loc = state->out_qualifier->vertices->get_location();
1744             if (vertices > state->Const.MaxPatchVertices) {
1745                _mesa_glsl_error(&loc, state, "vertices (%d) exceeds "
1746                                 "GL_MAX_PATCH_VERTICES", vertices);
1747             }
1748             shader->info.TessCtrl.VerticesOut = vertices;
1749          }
1750       }
1751       break;
1752    case MESA_SHADER_TESS_EVAL:
1753       shader->info.TessEval.PrimitiveMode = PRIM_UNKNOWN;
1754       if (state->in_qualifier->flags.q.prim_type)
1755          shader->info.TessEval.PrimitiveMode = state->in_qualifier->prim_type;
1756
1757       shader->info.TessEval.Spacing = TESS_SPACING_UNSPECIFIED;
1758       if (state->in_qualifier->flags.q.vertex_spacing)
1759          shader->info.TessEval.Spacing = state->in_qualifier->vertex_spacing;
1760
1761       shader->info.TessEval.VertexOrder = 0;
1762       if (state->in_qualifier->flags.q.ordering)
1763          shader->info.TessEval.VertexOrder = state->in_qualifier->ordering;
1764
1765       shader->info.TessEval.PointMode = -1;
1766       if (state->in_qualifier->flags.q.point_mode)
1767          shader->info.TessEval.PointMode = state->in_qualifier->point_mode;
1768       break;
1769    case MESA_SHADER_GEOMETRY:
1770       shader->info.Geom.VerticesOut = -1;
1771       if (state->out_qualifier->flags.q.max_vertices) {
1772          unsigned qual_max_vertices;
1773          if (state->out_qualifier->max_vertices->
1774                process_qualifier_constant(state, "max_vertices",
1775                                           &qual_max_vertices, true)) {
1776
1777             if (qual_max_vertices > state->Const.MaxGeometryOutputVertices) {
1778                YYLTYPE loc = state->out_qualifier->max_vertices->get_location();
1779                _mesa_glsl_error(&loc, state,
1780                                 "maximum output vertices (%d) exceeds "
1781                                 "GL_MAX_GEOMETRY_OUTPUT_VERTICES",
1782                                 qual_max_vertices);
1783             }
1784             shader->info.Geom.VerticesOut = qual_max_vertices;
1785          }
1786       }
1787
1788       if (state->gs_input_prim_type_specified) {
1789          shader->info.Geom.InputType = state->in_qualifier->prim_type;
1790       } else {
1791          shader->info.Geom.InputType = PRIM_UNKNOWN;
1792       }
1793
1794       if (state->out_qualifier->flags.q.prim_type) {
1795          shader->info.Geom.OutputType = state->out_qualifier->prim_type;
1796       } else {
1797          shader->info.Geom.OutputType = PRIM_UNKNOWN;
1798       }
1799
1800       shader->info.Geom.Invocations = 0;
1801       if (state->in_qualifier->flags.q.invocations) {
1802          unsigned invocations;
1803          if (state->in_qualifier->invocations->
1804                process_qualifier_constant(state, "invocations",
1805                                           &invocations, false)) {
1806
1807             YYLTYPE loc = state->in_qualifier->invocations->get_location();
1808             if (invocations > MAX_GEOMETRY_SHADER_INVOCATIONS) {
1809                _mesa_glsl_error(&loc, state,
1810                                 "invocations (%d) exceeds "
1811                                 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS",
1812                                 invocations);
1813             }
1814             shader->info.Geom.Invocations = invocations;
1815          }
1816       }
1817       break;
1818
1819    case MESA_SHADER_COMPUTE:
1820       if (state->cs_input_local_size_specified) {
1821          for (int i = 0; i < 3; i++)
1822             shader->info.Comp.LocalSize[i] = state->cs_input_local_size[i];
1823       } else {
1824          for (int i = 0; i < 3; i++)
1825             shader->info.Comp.LocalSize[i] = 0;
1826       }
1827
1828       shader->info.Comp.LocalSizeVariable =
1829          state->cs_input_local_size_variable_specified;
1830       break;
1831
1832    case MESA_SHADER_FRAGMENT:
1833       shader->redeclares_gl_fragcoord = state->fs_redeclares_gl_fragcoord;
1834       shader->uses_gl_fragcoord = state->fs_uses_gl_fragcoord;
1835       shader->pixel_center_integer = state->fs_pixel_center_integer;
1836       shader->origin_upper_left = state->fs_origin_upper_left;
1837       shader->ARB_fragment_coord_conventions_enable =
1838          state->ARB_fragment_coord_conventions_enable;
1839       shader->EarlyFragmentTests = state->fs_early_fragment_tests;
1840       shader->InnerCoverage = state->fs_inner_coverage;
1841       shader->PostDepthCoverage = state->fs_post_depth_coverage;
1842       shader->BlendSupport = state->fs_blend_support;
1843       break;
1844
1845    default:
1846       /* Nothing to do. */
1847       break;
1848    }
1849
1850    shader->bindless_sampler = state->bindless_sampler_specified;
1851    shader->bindless_image = state->bindless_image_specified;
1852    shader->bound_sampler = state->bound_sampler_specified;
1853    shader->bound_image = state->bound_image_specified;
1854 }
1855
1856 /* src can be NULL if only the symbols found in the exec_list should be
1857  * copied
1858  */
1859 void
1860 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1861                                    struct glsl_symbol_table *src,
1862                                    struct glsl_symbol_table *dest)
1863 {
1864    foreach_in_list (ir_instruction, ir, shader_ir) {
1865       switch (ir->ir_type) {
1866       case ir_type_function:
1867          dest->add_function((ir_function *) ir);
1868          break;
1869       case ir_type_variable: {
1870          ir_variable *const var = (ir_variable *) ir;
1871
1872          if (var->data.mode != ir_var_temporary)
1873             dest->add_variable(var);
1874          break;
1875       }
1876       default:
1877          break;
1878       }
1879    }
1880
1881    if (src != NULL) {
1882       /* Explicitly copy the gl_PerVertex interface definitions because these
1883        * are needed to check they are the same during the interstage link.
1884        * They can’t necessarily be found via the exec_list because the members
1885        * might not be referenced. The GL spec still requires that they match
1886        * in that case.
1887        */
1888       const glsl_type *iface =
1889          src->get_interface("gl_PerVertex", ir_var_shader_in);
1890       if (iface)
1891          dest->add_interface(iface->name, iface, ir_var_shader_in);
1892
1893       iface = src->get_interface("gl_PerVertex", ir_var_shader_out);
1894       if (iface)
1895          dest->add_interface(iface->name, iface, ir_var_shader_out);
1896    }
1897 }
1898
1899 extern "C" {
1900
1901 static void
1902 assign_subroutine_indexes(struct _mesa_glsl_parse_state *state)
1903 {
1904    int j, k;
1905    int index = 0;
1906
1907    for (j = 0; j < state->num_subroutines; j++) {
1908       while (state->subroutines[j]->subroutine_index == -1) {
1909          for (k = 0; k < state->num_subroutines; k++) {
1910             if (state->subroutines[k]->subroutine_index == index)
1911                break;
1912             else if (k == state->num_subroutines - 1) {
1913                state->subroutines[j]->subroutine_index = index;
1914             }
1915          }
1916          index++;
1917       }
1918    }
1919 }
1920
1921 static void
1922 add_builtin_defines(struct _mesa_glsl_parse_state *state,
1923                     void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1924                     struct glcpp_parser *data,
1925                     unsigned version,
1926                     bool es)
1927 {
1928    unsigned gl_version = state->ctx->Extensions.Version;
1929    gl_api api = state->ctx->API;
1930
1931    if (gl_version != 0xff) {
1932       unsigned i;
1933       for (i = 0; i < state->num_supported_versions; i++) {
1934          if (state->supported_versions[i].ver == version &&
1935              state->supported_versions[i].es == es) {
1936             gl_version = state->supported_versions[i].gl_ver;
1937             break;
1938          }
1939       }
1940
1941       if (i == state->num_supported_versions)
1942          return;
1943    }
1944
1945    if (es)
1946       api = API_OPENGLES2;
1947
1948    for (unsigned i = 0;
1949         i < ARRAY_SIZE(_mesa_glsl_supported_extensions); ++i) {
1950       const _mesa_glsl_extension *extension
1951          = &_mesa_glsl_supported_extensions[i];
1952       if (extension->compatible_with_state(state, api, gl_version)) {
1953          add_builtin_define(data, extension->name, 1);
1954       }
1955    }
1956 }
1957
1958 /* Implements parsing checks that we can't do during parsing */
1959 static void
1960 do_late_parsing_checks(struct _mesa_glsl_parse_state *state)
1961 {
1962    if (state->stage == MESA_SHADER_COMPUTE && !state->has_compute_shader()) {
1963       YYLTYPE loc;
1964       memset(&loc, 0, sizeof(loc));
1965       _mesa_glsl_error(&loc, state, "Compute shaders require "
1966                        "GLSL 4.30 or GLSL ES 3.10");
1967    }
1968 }
1969
1970 static void
1971 opt_shader_and_create_symbol_table(struct gl_context *ctx,
1972                                    struct glsl_symbol_table *source_symbols,
1973                                    struct gl_shader *shader)
1974 {
1975    assert(shader->CompileStatus != COMPILE_FAILURE &&
1976           !shader->ir->is_empty());
1977
1978    struct gl_shader_compiler_options *options =
1979       &ctx->Const.ShaderCompilerOptions[shader->Stage];
1980
1981    /* Do some optimization at compile time to reduce shader IR size
1982     * and reduce later work if the same shader is linked multiple times
1983     */
1984    if (ctx->Const.GLSLOptimizeConservatively) {
1985       /* Run it just once. */
1986       do_common_optimization(shader->ir, false, false, options,
1987                              ctx->Const.NativeIntegers);
1988    } else {
1989       /* Repeat it until it stops making changes. */
1990       while (do_common_optimization(shader->ir, false, false, options,
1991                                     ctx->Const.NativeIntegers))
1992          ;
1993    }
1994
1995    validate_ir_tree(shader->ir);
1996
1997    enum ir_variable_mode other;
1998    switch (shader->Stage) {
1999    case MESA_SHADER_VERTEX:
2000       other = ir_var_shader_in;
2001       break;
2002    case MESA_SHADER_FRAGMENT:
2003       other = ir_var_shader_out;
2004       break;
2005    default:
2006       /* Something invalid to ensure optimize_dead_builtin_uniforms
2007        * doesn't remove anything other than uniforms or constants.
2008        */
2009       other = ir_var_mode_count;
2010       break;
2011    }
2012
2013    optimize_dead_builtin_variables(shader->ir, other);
2014
2015    validate_ir_tree(shader->ir);
2016
2017    /* Retain any live IR, but trash the rest. */
2018    reparent_ir(shader->ir, shader->ir);
2019
2020    /* Destroy the symbol table.  Create a new symbol table that contains only
2021     * the variables and functions that still exist in the IR.  The symbol
2022     * table will be used later during linking.
2023     *
2024     * There must NOT be any freed objects still referenced by the symbol
2025     * table.  That could cause the linker to dereference freed memory.
2026     *
2027     * We don't have to worry about types or interface-types here because those
2028     * are fly-weights that are looked up by glsl_type.
2029     */
2030    _mesa_glsl_copy_symbols_from_table(shader->ir, source_symbols,
2031                                       shader->symbols);
2032 }
2033
2034 void
2035 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
2036                           bool dump_ast, bool dump_hir, bool force_recompile)
2037 {
2038    const char *source = force_recompile && shader->FallbackSource ?
2039       shader->FallbackSource : shader->Source;
2040
2041    if (!force_recompile) {
2042       if (ctx->Cache) {
2043          char buf[41];
2044          disk_cache_compute_key(ctx->Cache, source, strlen(source),
2045                                 shader->sha1);
2046          if (disk_cache_has_key(ctx->Cache, shader->sha1)) {
2047             /* We've seen this shader before and know it compiles */
2048             if (ctx->_Shader->Flags & GLSL_CACHE_INFO) {
2049                _mesa_sha1_format(buf, shader->sha1);
2050                fprintf(stderr, "deferring compile of shader: %s\n", buf);
2051             }
2052             shader->CompileStatus = COMPILE_SKIPPED;
2053
2054             free((void *)shader->FallbackSource);
2055             shader->FallbackSource = NULL;
2056             return;
2057          }
2058       }
2059    } else {
2060       /* We should only ever end up here if a re-compile has been forced by a
2061        * shader cache miss. In which case we can skip the compile if its
2062        * already be done by a previous fallback or the initial compile call.
2063        */
2064       if (shader->CompileStatus == COMPILE_SUCCESS)
2065          return;
2066
2067       if (shader->CompileStatus == COMPILED_NO_OPTS) {
2068          opt_shader_and_create_symbol_table(ctx,
2069                                             NULL, /* source_symbols */
2070                                             shader);
2071          shader->CompileStatus = COMPILE_SUCCESS;
2072          return;
2073       }
2074    }
2075
2076    struct _mesa_glsl_parse_state *state =
2077       new(shader) _mesa_glsl_parse_state(ctx, shader->Stage, shader);
2078
2079    if (ctx->Const.GenerateTemporaryNames)
2080       (void) p_atomic_cmpxchg(&ir_variable::temporaries_allocate_names,
2081                               false, true);
2082
2083    state->error = glcpp_preprocess(state, &source, &state->info_log,
2084                                    add_builtin_defines, state, ctx);
2085
2086    if (!state->error) {
2087      _mesa_glsl_lexer_ctor(state, source);
2088      _mesa_glsl_parse(state);
2089      _mesa_glsl_lexer_dtor(state);
2090      do_late_parsing_checks(state);
2091    }
2092
2093    if (dump_ast) {
2094       foreach_list_typed(ast_node, ast, link, &state->translation_unit) {
2095          ast->print();
2096       }
2097       printf("\n\n");
2098    }
2099
2100    ralloc_free(shader->ir);
2101    shader->ir = new(shader) exec_list;
2102    if (!state->error && !state->translation_unit.is_empty())
2103       _mesa_ast_to_hir(shader->ir, state);
2104
2105    if (!state->error) {
2106       validate_ir_tree(shader->ir);
2107
2108       /* Print out the unoptimized IR. */
2109       if (dump_hir) {
2110          _mesa_print_ir(stdout, shader->ir, state);
2111       }
2112    }
2113
2114    if (shader->InfoLog)
2115       ralloc_free(shader->InfoLog);
2116
2117    if (!state->error)
2118       set_shader_inout_layout(shader, state);
2119
2120    shader->symbols = new(shader->ir) glsl_symbol_table;
2121    shader->CompileStatus = state->error ? COMPILE_FAILURE : COMPILE_SUCCESS;
2122    shader->InfoLog = state->info_log;
2123    shader->Version = state->language_version;
2124    shader->IsES = state->es_shader;
2125
2126    if (!state->error && !shader->ir->is_empty()) {
2127       assign_subroutine_indexes(state);
2128       lower_subroutine(shader->ir, state);
2129
2130       if (!ctx->Cache || force_recompile)
2131          opt_shader_and_create_symbol_table(ctx, state->symbols, shader);
2132       else {
2133          reparent_ir(shader->ir, shader->ir);
2134          shader->CompileStatus = COMPILED_NO_OPTS;
2135       }
2136    }
2137
2138    if (!force_recompile) {
2139       free((void *)shader->FallbackSource);
2140       shader->FallbackSource = NULL;
2141    }
2142
2143    delete state->symbols;
2144    ralloc_free(state);
2145 }
2146
2147 } /* extern "C" */
2148 /**
2149  * Do the set of common optimizations passes
2150  *
2151  * \param ir                          List of instructions to be optimized
2152  * \param linked                      Is the shader linked?  This enables
2153  *                                    optimizations passes that remove code at
2154  *                                    global scope and could cause linking to
2155  *                                    fail.
2156  * \param uniform_locations_assigned  Have locations already been assigned for
2157  *                                    uniforms?  This prevents the declarations
2158  *                                    of unused uniforms from being removed.
2159  *                                    The setting of this flag only matters if
2160  *                                    \c linked is \c true.
2161  * \param options                     The driver's preferred shader options.
2162  * \param native_integers             Selects optimizations that depend on the
2163  *                                    implementations supporting integers
2164  *                                    natively (as opposed to supporting
2165  *                                    integers in floating point registers).
2166  */
2167 bool
2168 do_common_optimization(exec_list *ir, bool linked,
2169                        bool uniform_locations_assigned,
2170                        const struct gl_shader_compiler_options *options,
2171                        bool native_integers)
2172 {
2173    const bool debug = false;
2174    GLboolean progress = GL_FALSE;
2175
2176 #define OPT(PASS, ...) do {                                             \
2177       if (debug) {                                                      \
2178          fprintf(stderr, "START GLSL optimization %s\n", #PASS);        \
2179          const bool opt_progress = PASS(__VA_ARGS__);                   \
2180          progress = opt_progress || progress;                           \
2181          if (opt_progress)                                              \
2182             _mesa_print_ir(stderr, ir, NULL);                           \
2183          fprintf(stderr, "GLSL optimization %s: %s progress\n",         \
2184                  #PASS, opt_progress ? "made" : "no");                  \
2185       } else {                                                          \
2186          progress = PASS(__VA_ARGS__) || progress;                      \
2187       }                                                                 \
2188    } while (false)
2189
2190    OPT(lower_instructions, ir, SUB_TO_ADD_NEG);
2191
2192    if (linked) {
2193       OPT(do_function_inlining, ir);
2194       OPT(do_dead_functions, ir);
2195       OPT(do_structure_splitting, ir);
2196    }
2197    propagate_invariance(ir);
2198    OPT(do_if_simplification, ir);
2199    OPT(opt_flatten_nested_if_blocks, ir);
2200    OPT(opt_conditional_discard, ir);
2201    OPT(do_copy_propagation, ir);
2202    OPT(do_copy_propagation_elements, ir);
2203
2204    if (options->OptimizeForAOS && !linked)
2205       OPT(opt_flip_matrices, ir);
2206
2207    if (linked && options->OptimizeForAOS) {
2208       OPT(do_vectorize, ir);
2209    }
2210
2211    if (linked)
2212       OPT(do_dead_code, ir, uniform_locations_assigned);
2213    else
2214       OPT(do_dead_code_unlinked, ir);
2215    OPT(do_dead_code_local, ir);
2216    OPT(do_tree_grafting, ir);
2217    OPT(do_constant_propagation, ir);
2218    if (linked)
2219       OPT(do_constant_variable, ir);
2220    else
2221       OPT(do_constant_variable_unlinked, ir);
2222    OPT(do_constant_folding, ir);
2223    OPT(do_minmax_prune, ir);
2224    OPT(do_rebalance_tree, ir);
2225    OPT(do_algebraic, ir, native_integers, options);
2226    OPT(do_lower_jumps, ir, true, true, options->EmitNoMainReturn,
2227        options->EmitNoCont, options->EmitNoLoops);
2228    OPT(do_vec_index_to_swizzle, ir);
2229    OPT(lower_vector_insert, ir, false);
2230    OPT(optimize_swizzles, ir);
2231
2232    OPT(optimize_split_arrays, ir, linked);
2233    OPT(optimize_redundant_jumps, ir);
2234
2235    if (options->MaxUnrollIterations) {
2236       loop_state *ls = analyze_loop_variables(ir);
2237       if (ls->loop_found) {
2238          bool loop_progress = unroll_loops(ir, ls, options);
2239          while (loop_progress) {
2240             loop_progress = false;
2241             loop_progress |= do_constant_propagation(ir);
2242             loop_progress |= do_if_simplification(ir);
2243          }
2244          progress |= loop_progress;
2245       }
2246       delete ls;
2247    }
2248
2249 #undef OPT
2250
2251    return progress;
2252 }
2253
2254 extern "C" {
2255
2256 /**
2257  * To be called at GL teardown time, this frees compiler datastructures.
2258  *
2259  * After calling this, any previously compiled shaders and shader
2260  * programs would be invalid.  So this should happen at approximately
2261  * program exit.
2262  */
2263 void
2264 _mesa_destroy_shader_compiler(void)
2265 {
2266    _mesa_destroy_shader_compiler_caches();
2267
2268    _mesa_glsl_release_types();
2269 }
2270
2271 /**
2272  * Releases compiler caches to trade off performance for memory.
2273  *
2274  * Intended to be used with glReleaseShaderCompiler().
2275  */
2276 void
2277 _mesa_destroy_shader_compiler_caches(void)
2278 {
2279    _mesa_glsl_release_builtin_functions();
2280 }
2281
2282 }