src/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 extern "C" {
  29 #include "main/core.h" /* for struct gl_context */
  30 }
  31
  32 #include "ralloc.h"
  33 #include "ast.h"
  34 #include "glsl_parser_extras.h"
  35 #include "glsl_parser.h"
  36 #include "ir_optimization.h"
  37 #include "loop_analysis.h"
  38
  39 _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *ctx,
  40                                                GLenum target, void *mem_ctx)
  41 {
  42    switch (target) {
  43    case GL_VERTEX_SHADER:   this->target = vertex_shader; break;
  44    case GL_FRAGMENT_SHADER: this->target = fragment_shader; break;
  45    case GL_GEOMETRY_SHADER: this->target = geometry_shader; break;
  46    }
  47
  48    this->scanner = NULL;
  49    this->translation_unit.make_empty();
  50    this->symbols = new(mem_ctx) glsl_symbol_table;
  51    this->info_log = ralloc_strdup(mem_ctx, "");
  52    this->error = false;
  53    this->loop_or_switch_nesting = NULL;
  54
  55    /* Set default language version and extensions */
  56    this->language_version = 110;
  57    this->es_shader = false;
  58    this->ARB_texture_rectangle_enable = true;
  59
  60    /* OpenGL ES 2.0 has different defaults from desktop GL. */
  61    if (ctx->API == API_OPENGLES2) {
  62       this->language_version = 100;
  63       this->es_shader = true;
  64       this->ARB_texture_rectangle_enable = false;
  65    }
  66
  67    this->extensions = &ctx->Extensions;
  68
  69    this->Const.MaxLights = ctx->Const.MaxLights;
  70    this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
  71    this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;
  72    this->Const.MaxTextureCoords = ctx->Const.MaxTextureCoordUnits;
  73    this->Const.MaxVertexAttribs = ctx->Const.VertexProgram.MaxAttribs;
  74    this->Const.MaxVertexUniformComponents = ctx->Const.VertexProgram.MaxUniformComponents;
  75    this->Const.MaxVaryingFloats = ctx->Const.MaxVarying * 4;
  76    this->Const.MaxVertexTextureImageUnits = ctx->Const.MaxVertexTextureImageUnits;
  77    this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits;
  78    this->Const.MaxTextureImageUnits = ctx->Const.MaxTextureImageUnits;
  79    this->Const.MaxFragmentUniformComponents = ctx->Const.FragmentProgram.MaxUniformComponents;
  80
  81    this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers;
  82
  83    /* Note: Once the OpenGL 3.0 'forward compatible' context or the OpenGL 3.2
  84     * Core context is supported, this logic will need change.  Older versions of
  85     * GLSL are no longer supported outside the compatibility contexts of 3.x.
  86     */
  87    this->Const.GLSL_100ES = (ctx->API == API_OPENGLES2)
  88       || ctx->Extensions.ARB_ES2_compatibility;
  89    this->Const.GLSL_110 = (ctx->API == API_OPENGL);
  90    this->Const.GLSL_120 = (ctx->API == API_OPENGL)
  91       && (ctx->Const.GLSLVersion >= 120);
  92    this->Const.GLSL_130 = (ctx->API == API_OPENGL)
  93       && (ctx->Const.GLSLVersion >= 130);
  94
  95    const unsigned lowest_version =
  96       (ctx->API == API_OPENGLES2) || ctx->Extensions.ARB_ES2_compatibility
  97       ? 100 : 110;
  98    const unsigned highest_version =
  99       (ctx->API == API_OPENGL) ? ctx->Const.GLSLVersion : 100;
 100    char *supported = ralloc_strdup(this, "");
 101
 102    for (unsigned ver = lowest_version; ver <= highest_version; ver += 10) {
 103       const char *const prefix = (ver == lowest_version)
 104          ? ""
 105          : ((ver == highest_version) ? ", and " : ", ");
 106
 107       ralloc_asprintf_append(& supported, "%s%d.%02d%s",
 108                              prefix,
 109                              ver / 100, ver % 100,
 110                              (ver == 100) ? " ES" : "");
 111    }
 112
 113    this->supported_version_string = supported;
 114 }
 115
 116 const char *
 117 _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target)
 118 {
 119    switch (target) {
 120    case vertex_shader:   return "vertex";
 121    case fragment_shader: return "fragment";
 122    case geometry_shader: return "geometry";
 123    }
 124
 125    assert(!"Should not get here.");
 126    return "unknown";
 127 }
 128
 129
 130 void
 131 _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 132                  const char *fmt, ...)
 133 {
 134    va_list ap;
 135
 136    state->error = true;
 137
 138    assert(state->info_log != NULL);
 139    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): error: ",
 140                                             locp->source,
 141                                             locp->first_line,
 142                                             locp->first_column);
 143    va_start(ap, fmt);
 144    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 145    va_end(ap);
 146    ralloc_strcat(&state->info_log, "\n");
 147 }
 148
 149
 150 void
 151 _mesa_glsl_warning(const YYLTYPE *locp, _mesa_glsl_parse_state *state,
 152                    const char *fmt, ...)
 153 {
 154    va_list ap;
 155
 156    assert(state->info_log != NULL);
 157    ralloc_asprintf_append(&state->info_log, "%u:%u(%u): warning: ",
 158                                             locp->source,
 159                                             locp->first_line,
 160                                             locp->first_column);
 161    va_start(ap, fmt);
 162    ralloc_vasprintf_append(&state->info_log, fmt, ap);
 163    va_end(ap);
 164    ralloc_strcat(&state->info_log, "\n");
 165 }
 166
 167
 168 bool
 169 _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 170                              const char *behavior, YYLTYPE *behavior_locp,
 171                              _mesa_glsl_parse_state *state)
 172 {
 173    enum {
 174       extension_disable,
 175       extension_enable,
 176       extension_require,
 177       extension_warn
 178    } ext_mode;
 179
 180    if (strcmp(behavior, "warn") == 0) {
 181       ext_mode = extension_warn;
 182    } else if (strcmp(behavior, "require") == 0) {
 183       ext_mode = extension_require;
 184    } else if (strcmp(behavior, "enable") == 0) {
 185       ext_mode = extension_enable;
 186    } else if (strcmp(behavior, "disable") == 0) {
 187       ext_mode = extension_disable;
 188    } else {
 189       _mesa_glsl_error(behavior_locp, state,
 190                        "Unknown extension behavior `%s'",
 191                        behavior);
 192       return false;
 193    }
 194
 195    bool unsupported = false;
 196
 197    if (strcmp(name, "all") == 0) {
 198       if ((ext_mode == extension_enable) || (ext_mode == extension_require)) {
 199          _mesa_glsl_error(name_locp, state, "Cannot %s all extensions",
 200                           (ext_mode == extension_enable)
 201                           ? "enable" : "require");
 202          return false;
 203       }
 204    } else if (strcmp(name, "GL_ARB_draw_buffers") == 0) {
 205       /* This extension is only supported in fragment shaders.
 206        */
 207       if (state->target != fragment_shader) {
 208          unsupported = true;
 209       } else {
 210          state->ARB_draw_buffers_enable = (ext_mode != extension_disable);
 211          state->ARB_draw_buffers_warn = (ext_mode == extension_warn);
 212       }
 213    } else if (strcmp(name, "GL_ARB_draw_instanced") == 0) {
 214       state->ARB_draw_instanced_enable = (ext_mode != extension_disable);
 215       state->ARB_draw_instanced_warn = (ext_mode == extension_warn);
 216
 217       /* This extension is only supported in vertex shaders.
 218        */
 219       unsupported = (state->target != vertex_shader)
 220          ||  !state->extensions->ARB_draw_instanced;
 221    } else if (strcmp(name, "GL_ARB_explicit_attrib_location") == 0) {
 222       state->ARB_explicit_attrib_location_enable =
 223          (ext_mode != extension_disable);
 224       state->ARB_explicit_attrib_location_warn =
 225          (ext_mode == extension_warn);
 226
 227       unsupported = !state->extensions->ARB_explicit_attrib_location;
 228    } else if (strcmp(name, "GL_ARB_fragment_coord_conventions") == 0) {
 229       state->ARB_fragment_coord_conventions_enable =
 230          (ext_mode != extension_disable);
 231       state->ARB_fragment_coord_conventions_warn =
 232          (ext_mode == extension_warn);
 233
 234       unsupported = !state->extensions->ARB_fragment_coord_conventions;
 235    } else if (strcmp(name, "GL_ARB_texture_rectangle") == 0) {
 236       state->ARB_texture_rectangle_enable = (ext_mode != extension_disable);
 237       state->ARB_texture_rectangle_warn = (ext_mode == extension_warn);
 238    } else if (strcmp(name, "GL_EXT_texture_array") == 0) {
 239       state->EXT_texture_array_enable = (ext_mode != extension_disable);
 240       state->EXT_texture_array_warn = (ext_mode == extension_warn);
 241
 242       unsupported = !state->extensions->EXT_texture_array;
 243    } else if (strcmp(name, "GL_ARB_shader_stencil_export") == 0) {
 244       state->ARB_shader_stencil_export_enable = (ext_mode != extension_disable);
 245       state->ARB_shader_stencil_export_warn = (ext_mode == extension_warn);
 246
 247       /* This extension is only supported in fragment shaders.
 248        */
 249       unsupported = (state->target != fragment_shader)
 250          || !state->extensions->ARB_shader_stencil_export;
 251    } else if (strcmp(name, "GL_AMD_conservative_depth") == 0) {
 252       /* The AMD_conservative spec does not forbid requiring the extension in
 253        * the vertex shader.
 254        */
 255       state->AMD_conservative_depth_enable = (ext_mode != extension_disable);
 256       state->AMD_conservative_depth_warn = (ext_mode == extension_warn);
 257       unsupported = !state->extensions->AMD_conservative_depth;
 258    } else if (strcmp(name, "GL_AMD_shader_stencil_export") == 0) {
 259       state->AMD_shader_stencil_export_enable = (ext_mode != extension_disable);
 260       state->AMD_shader_stencil_export_warn = (ext_mode == extension_warn);
 261
 262       /* This extension is only supported in fragment shaders.
 263        * Both the ARB and AMD variants share the same ARB flag
 264        * in gl_extensions.
 265        */
 266       unsupported = (state->target != fragment_shader)
 267          || !state->extensions->ARB_shader_stencil_export;
 268    } else if (strcmp(name, "GL_OES_texture_3D") == 0 && state->es_shader) {
 269       state->OES_texture_3D_enable = (ext_mode != extension_disable);
 270       state->OES_texture_3D_warn = (ext_mode == extension_warn);
 271
 272       unsupported = !state->extensions->EXT_texture3D;
 273    } else {
 274       unsupported = true;
 275    }
 276
 277    if (unsupported) {
 278       static const char *const fmt = "extension `%s' unsupported in %s shader";
 279
 280       if (ext_mode == extension_require) {
 281          _mesa_glsl_error(name_locp, state, fmt,
 282                           name, _mesa_glsl_shader_target_name(state->target));
 283          return false;
 284       } else {
 285          _mesa_glsl_warning(name_locp, state, fmt,
 286                             name, _mesa_glsl_shader_target_name(state->target));
 287       }
 288    }
 289
 290    return true;
 291 }
 292
 293 void
 294 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
 295 {
 296    if (q->flags.q.constant)
 297       printf("const ");
 298
 299    if (q->flags.q.invariant)
 300       printf("invariant ");
 301
 302    if (q->flags.q.attribute)
 303       printf("attribute ");
 304
 305    if (q->flags.q.varying)
 306       printf("varying ");
 307
 308    if (q->flags.q.in && q->flags.q.out)
 309       printf("inout ");
 310    else {
 311       if (q->flags.q.in)
 312          printf("in ");
 313
 314       if (q->flags.q.out)
 315          printf("out ");
 316    }
 317
 318    if (q->flags.q.centroid)
 319       printf("centroid ");
 320    if (q->flags.q.uniform)
 321       printf("uniform ");
 322    if (q->flags.q.smooth)
 323       printf("smooth ");
 324    if (q->flags.q.flat)
 325       printf("flat ");
 326    if (q->flags.q.noperspective)
 327       printf("noperspective ");
 328 }
 329
 330
 331 void
 332 ast_node::print(void) const
 333 {
 334    printf("unhandled node ");
 335 }
 336
 337
 338 ast_node::ast_node(void)
 339 {
 340    this->location.source = 0;
 341    this->location.line = 0;
 342    this->location.column = 0;
 343 }
 344
 345
 346 static void
 347 ast_opt_array_size_print(bool is_array, const ast_expression *array_size)
 348 {
 349    if (is_array) {
 350       printf("[ ");
 351
 352       if (array_size)
 353          array_size->print();
 354
 355       printf("] ");
 356    }
 357 }
 358
 359
 360 void
 361 ast_compound_statement::print(void) const
 362 {
 363    printf("{\n");
 364
 365    foreach_list_const(n, &this->statements) {
 366       ast_node *ast = exec_node_data(ast_node, n, link);
 367       ast->print();
 368    }
 369
 370    printf("}\n");
 371 }
 372
 373
 374 ast_compound_statement::ast_compound_statement(int new_scope,
 375                                                ast_node *statements)
 376 {
 377    this->new_scope = new_scope;
 378
 379    if (statements != NULL) {
 380       this->statements.push_degenerate_list_at_head(&statements->link);
 381    }
 382 }
 383
 384
 385 void
 386 ast_expression::print(void) const
 387 {
 388    switch (oper) {
 389    case ast_assign:
 390    case ast_mul_assign:
 391    case ast_div_assign:
 392    case ast_mod_assign:
 393    case ast_add_assign:
 394    case ast_sub_assign:
 395    case ast_ls_assign:
 396    case ast_rs_assign:
 397    case ast_and_assign:
 398    case ast_xor_assign:
 399    case ast_or_assign:
 400       subexpressions[0]->print();
 401       printf("%s ", operator_string(oper));
 402       subexpressions[1]->print();
 403       break;
 404
 405    case ast_field_selection:
 406       subexpressions[0]->print();
 407       printf(". %s ", primary_expression.identifier);
 408       break;
 409
 410    case ast_plus:
 411    case ast_neg:
 412    case ast_bit_not:
 413    case ast_logic_not:
 414    case ast_pre_inc:
 415    case ast_pre_dec:
 416       printf("%s ", operator_string(oper));
 417       subexpressions[0]->print();
 418       break;
 419
 420    case ast_post_inc:
 421    case ast_post_dec:
 422       subexpressions[0]->print();
 423       printf("%s ", operator_string(oper));
 424       break;
 425
 426    case ast_conditional:
 427       subexpressions[0]->print();
 428       printf("? ");
 429       subexpressions[1]->print();
 430       printf(": ");
 431       subexpressions[1]->print();
 432       break;
 433
 434    case ast_array_index:
 435       subexpressions[0]->print();
 436       printf("[ ");
 437       subexpressions[1]->print();
 438       printf("] ");
 439       break;
 440
 441    case ast_function_call: {
 442       subexpressions[0]->print();
 443       printf("( ");
 444
 445       foreach_list_const (n, &this->expressions) {
 446          if (n != this->expressions.get_head())
 447             printf(", ");
 448
 449          ast_node *ast = exec_node_data(ast_node, n, link);
 450          ast->print();
 451       }
 452
 453       printf(") ");
 454       break;
 455    }
 456
 457    case ast_identifier:
 458       printf("%s ", primary_expression.identifier);
 459       break;
 460
 461    case ast_int_constant:
 462       printf("%d ", primary_expression.int_constant);
 463       break;
 464
 465    case ast_uint_constant:
 466       printf("%u ", primary_expression.uint_constant);
 467       break;
 468
 469    case ast_float_constant:
 470       printf("%f ", primary_expression.float_constant);
 471       break;
 472
 473    case ast_bool_constant:
 474       printf("%s ",
 475              primary_expression.bool_constant
 476              ? "true" : "false");
 477       break;
 478
 479    case ast_sequence: {
 480       printf("( ");
 481       foreach_list_const(n, & this->expressions) {
 482          if (n != this->expressions.get_head())
 483             printf(", ");
 484
 485          ast_node *ast = exec_node_data(ast_node, n, link);
 486          ast->print();
 487       }
 488       printf(") ");
 489       break;
 490    }
 491
 492    default:
 493       assert(0);
 494       break;
 495    }
 496 }
 497
 498 ast_expression::ast_expression(int oper,
 499                                ast_expression *ex0,
 500                                ast_expression *ex1,
 501                                ast_expression *ex2)
 502 {
 503    this->oper = ast_operators(oper);
 504    this->subexpressions[0] = ex0;
 505    this->subexpressions[1] = ex1;
 506    this->subexpressions[2] = ex2;
 507 }
 508
 509
 510 void
 511 ast_expression_statement::print(void) const
 512 {
 513    if (expression)
 514       expression->print();
 515
 516    printf("; ");
 517 }
 518
 519
 520 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
 521    expression(ex)
 522 {
 523    /* empty */
 524 }
 525
 526
 527 void
 528 ast_function::print(void) const
 529 {
 530    return_type->print();
 531    printf(" %s (", identifier);
 532
 533    foreach_list_const(n, & this->parameters) {
 534       ast_node *ast = exec_node_data(ast_node, n, link);
 535       ast->print();
 536    }
 537
 538    printf(")");
 539 }
 540
 541
 542 ast_function::ast_function(void)
 543    : is_definition(false), signature(NULL)
 544 {
 545    /* empty */
 546 }
 547
 548
 549 void
 550 ast_fully_specified_type::print(void) const
 551 {
 552    _mesa_ast_type_qualifier_print(& qualifier);
 553    specifier->print();
 554 }
 555
 556
 557 void
 558 ast_parameter_declarator::print(void) const
 559 {
 560    type->print();
 561    if (identifier)
 562       printf("%s ", identifier);
 563    ast_opt_array_size_print(is_array, array_size);
 564 }
 565
 566
 567 void
 568 ast_function_definition::print(void) const
 569 {
 570    prototype->print();
 571    body->print();
 572 }
 573
 574
 575 void
 576 ast_declaration::print(void) const
 577 {
 578    printf("%s ", identifier);
 579    ast_opt_array_size_print(is_array, array_size);
 580
 581    if (initializer) {
 582       printf("= ");
 583       initializer->print();
 584    }
 585 }
 586
 587
 588 ast_declaration::ast_declaration(char *identifier, int is_array,
 589                                  ast_expression *array_size,
 590                                  ast_expression *initializer)
 591 {
 592    this->identifier = identifier;
 593    this->is_array = is_array;
 594    this->array_size = array_size;
 595    this->initializer = initializer;
 596 }
 597
 598
 599 void
 600 ast_declarator_list::print(void) const
 601 {
 602    assert(type || invariant);
 603
 604    if (type)
 605       type->print();
 606    else
 607       printf("invariant ");
 608
 609    foreach_list_const (ptr, & this->declarations) {
 610       if (ptr != this->declarations.get_head())
 611          printf(", ");
 612
 613       ast_node *ast = exec_node_data(ast_node, ptr, link);
 614       ast->print();
 615    }
 616
 617    printf("; ");
 618 }
 619
 620
 621 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
 622 {
 623    this->type = type;
 624    this->invariant = false;
 625 }
 626
 627 void
 628 ast_jump_statement::print(void) const
 629 {
 630    switch (mode) {
 631    case ast_continue:
 632       printf("continue; ");
 633       break;
 634    case ast_break:
 635       printf("break; ");
 636       break;
 637    case ast_return:
 638       printf("return ");
 639       if (opt_return_value)
 640          opt_return_value->print();
 641
 642       printf("; ");
 643       break;
 644    case ast_discard:
 645       printf("discard; ");
 646       break;
 647    }
 648 }
 649
 650
 651 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
 652 {
 653    this->mode = ast_jump_modes(mode);
 654
 655    if (mode == ast_return)
 656       opt_return_value = return_value;
 657 }
 658
 659
 660 void
 661 ast_selection_statement::print(void) const
 662 {
 663    printf("if ( ");
 664    condition->print();
 665    printf(") ");
 666
 667    then_statement->print();
 668
 669    if (else_statement) {
 670       printf("else ");
 671       else_statement->print();
 672    }
 673
 674 }
 675
 676
 677 ast_selection_statement::ast_selection_statement(ast_expression *condition,
 678                                                  ast_node *then_statement,
 679                                                  ast_node *else_statement)
 680 {
 681    this->condition = condition;
 682    this->then_statement = then_statement;
 683    this->else_statement = else_statement;
 684 }
 685
 686
 687 void
 688 ast_iteration_statement::print(void) const
 689 {
 690    switch (mode) {
 691    case ast_for:
 692       printf("for( ");
 693       if (init_statement)
 694          init_statement->print();
 695       printf("; ");
 696
 697       if (condition)
 698          condition->print();
 699       printf("; ");
 700
 701       if (rest_expression)
 702          rest_expression->print();
 703       printf(") ");
 704
 705       body->print();
 706       break;
 707
 708    case ast_while:
 709       printf("while ( ");
 710       if (condition)
 711          condition->print();
 712       printf(") ");
 713       body->print();
 714       break;
 715
 716    case ast_do_while:
 717       printf("do ");
 718       body->print();
 719       printf("while ( ");
 720       if (condition)
 721          condition->print();
 722       printf("); ");
 723       break;
 724    }
 725 }
 726
 727
 728 ast_iteration_statement::ast_iteration_statement(int mode,
 729                                                  ast_node *init,
 730                                                  ast_node *condition,
 731                                                  ast_expression *rest_expression,
 732                                                  ast_node *body)
 733 {
 734    this->mode = ast_iteration_modes(mode);
 735    this->init_statement = init;
 736    this->condition = condition;
 737    this->rest_expression = rest_expression;
 738    this->body = body;
 739 }
 740
 741
 742 void
 743 ast_struct_specifier::print(void) const
 744 {
 745    printf("struct %s { ", name);
 746    foreach_list_const(n, &this->declarations) {
 747       ast_node *ast = exec_node_data(ast_node, n, link);
 748       ast->print();
 749    }
 750    printf("} ");
 751 }
 752
 753
 754 ast_struct_specifier::ast_struct_specifier(char *identifier,
 755                                            ast_node *declarator_list)
 756 {
 757    if (identifier == NULL) {
 758       static unsigned anon_count = 1;
 759       identifier = ralloc_asprintf(this, "#anon_struct_%04x", anon_count);
 760       anon_count++;
 761    }
 762    name = identifier;
 763    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
 764 }
 765
 766 bool
 767 do_common_optimization(exec_list *ir, bool linked, unsigned max_unroll_iterations)
 768 {
 769    GLboolean progress = GL_FALSE;
 770
 771    progress = lower_instructions(ir, SUB_TO_ADD_NEG) || progress;
 772
 773    if (linked) {
 774       progress = do_function_inlining(ir) || progress;
 775       progress = do_dead_functions(ir) || progress;
 776    }
 777    progress = do_structure_splitting(ir) || progress;
 778    progress = do_if_simplification(ir) || progress;
 779    progress = do_discard_simplification(ir) || progress;
 780    progress = do_copy_propagation(ir) || progress;
 781    progress = do_copy_propagation_elements(ir) || progress;
 782    if (linked)
 783       progress = do_dead_code(ir) || progress;
 784    else
 785       progress = do_dead_code_unlinked(ir) || progress;
 786    progress = do_dead_code_local(ir) || progress;
 787    progress = do_tree_grafting(ir) || progress;
 788    progress = do_constant_propagation(ir) || progress;
 789    if (linked)
 790       progress = do_constant_variable(ir) || progress;
 791    else
 792       progress = do_constant_variable_unlinked(ir) || progress;
 793    progress = do_constant_folding(ir) || progress;
 794    progress = do_algebraic(ir) || progress;
 795    progress = do_lower_jumps(ir) || progress;
 796    progress = do_vec_index_to_swizzle(ir) || progress;
 797    progress = do_swizzle_swizzle(ir) || progress;
 798    progress = do_noop_swizzle(ir) || progress;
 799
 800    progress = optimize_redundant_jumps(ir) || progress;
 801
 802    loop_state *ls = analyze_loop_variables(ir);
 803    if (ls->loop_found) {
 804       progress = set_loop_controls(ir, ls) || progress;
 805       progress = unroll_loops(ir, ls, max_unroll_iterations) || progress;
 806    }
 807    delete ls;
 808
 809    return progress;
 810 }
 811
 812 extern "C" {
 813
 814 /**
 815  * To be called at GL teardown time, this frees compiler datastructures.
 816  *
 817  * After calling this, any previously compiled shaders and shader
 818  * programs would be invalid.  So this should happen at approximately
 819  * program exit.
 820  */
 821 void
 822 _mesa_destroy_shader_compiler(void)
 823 {
 824    _mesa_destroy_shader_compiler_caches();
 825
 826    _mesa_glsl_release_types();
 827 }
 828
 829 /**
 830  * Releases compiler caches to trade off performance for memory.
 831  *
 832  * Intended to be used with glReleaseShaderCompiler().
 833  */
 834 void
 835 _mesa_destroy_shader_compiler_caches(void)
 836 {
 837    _mesa_glsl_release_functions();
 838 }
 839
 840 }