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