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       /* This extension is only supported in vertex shaders.
 215        */
 216       if (state->target != vertex_shader) {
 217          unsupported = true;
 218       } else {
 219          state->ARB_draw_instanced_enable = (ext_mode != extension_disable);
 220          state->ARB_draw_instanced_warn = (ext_mode == extension_warn);
 221       }
 222    } else if (strcmp(name, "GL_ARB_explicit_attrib_location") == 0) {
 223       state->ARB_explicit_attrib_location_enable =
 224          (ext_mode != extension_disable);
 225       state->ARB_explicit_attrib_location_warn =
 226          (ext_mode == extension_warn);
 227
 228       unsupported = !state->extensions->ARB_explicit_attrib_location;
 229    } else if (strcmp(name, "GL_ARB_fragment_coord_conventions") == 0) {
 230       state->ARB_fragment_coord_conventions_enable =
 231          (ext_mode != extension_disable);
 232       state->ARB_fragment_coord_conventions_warn =
 233          (ext_mode == extension_warn);
 234
 235       unsupported = !state->extensions->ARB_fragment_coord_conventions;
 236    } else if (strcmp(name, "GL_ARB_texture_rectangle") == 0) {
 237       state->ARB_texture_rectangle_enable = (ext_mode != extension_disable);
 238       state->ARB_texture_rectangle_warn = (ext_mode == extension_warn);
 239    } else if (strcmp(name, "GL_EXT_texture_array") == 0) {
 240       state->EXT_texture_array_enable = (ext_mode != extension_disable);
 241       state->EXT_texture_array_warn = (ext_mode == extension_warn);
 242
 243       unsupported = !state->extensions->EXT_texture_array;
 244    } else if (strcmp(name, "GL_ARB_shader_stencil_export") == 0) {
 245       if (state->target != fragment_shader) {
 246          unsupported = true;
 247       } else {
 248          state->ARB_shader_stencil_export_enable = (ext_mode != extension_disable);
 249          state->ARB_shader_stencil_export_warn = (ext_mode == extension_warn);
 250          unsupported = !state->extensions->ARB_shader_stencil_export;
 251       }
 252    } else if (strcmp(name, "GL_AMD_conservative_depth") == 0) {
 253       /* The AMD_conservative spec does not forbid requiring the extension in
 254        * the vertex shader.
 255        */
 256       state->AMD_conservative_depth_enable = (ext_mode != extension_disable);
 257       state->AMD_conservative_depth_warn = (ext_mode == extension_warn);
 258       unsupported = !state->extensions->AMD_conservative_depth;
 259    } else {
 260       unsupported = true;
 261    }
 262
 263    if (unsupported) {
 264       static const char *const fmt = "extension `%s' unsupported in %s shader";
 265
 266       if (ext_mode == extension_require) {
 267          _mesa_glsl_error(name_locp, state, fmt,
 268                           name, _mesa_glsl_shader_target_name(state->target));
 269          return false;
 270       } else {
 271          _mesa_glsl_warning(name_locp, state, fmt,
 272                             name, _mesa_glsl_shader_target_name(state->target));
 273       }
 274    }
 275
 276    return true;
 277 }
 278
 279 void
 280 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
 281 {
 282    if (q->flags.q.constant)
 283       printf("const ");
 284
 285    if (q->flags.q.invariant)
 286       printf("invariant ");
 287
 288    if (q->flags.q.attribute)
 289       printf("attribute ");
 290
 291    if (q->flags.q.varying)
 292       printf("varying ");
 293
 294    if (q->flags.q.in && q->flags.q.out)
 295       printf("inout ");
 296    else {
 297       if (q->flags.q.in)
 298          printf("in ");
 299
 300       if (q->flags.q.out)
 301          printf("out ");
 302    }
 303
 304    if (q->flags.q.centroid)
 305       printf("centroid ");
 306    if (q->flags.q.uniform)
 307       printf("uniform ");
 308    if (q->flags.q.smooth)
 309       printf("smooth ");
 310    if (q->flags.q.flat)
 311       printf("flat ");
 312    if (q->flags.q.noperspective)
 313       printf("noperspective ");
 314 }
 315
 316
 317 void
 318 ast_node::print(void) const
 319 {
 320    printf("unhandled node ");
 321 }
 322
 323
 324 ast_node::ast_node(void)
 325 {
 326    this->location.source = 0;
 327    this->location.line = 0;
 328    this->location.column = 0;
 329 }
 330
 331
 332 static void
 333 ast_opt_array_size_print(bool is_array, const ast_expression *array_size)
 334 {
 335    if (is_array) {
 336       printf("[ ");
 337
 338       if (array_size)
 339          array_size->print();
 340
 341       printf("] ");
 342    }
 343 }
 344
 345
 346 void
 347 ast_compound_statement::print(void) const
 348 {
 349    printf("{\n");
 350
 351    foreach_list_const(n, &this->statements) {
 352       ast_node *ast = exec_node_data(ast_node, n, link);
 353       ast->print();
 354    }
 355
 356    printf("}\n");
 357 }
 358
 359
 360 ast_compound_statement::ast_compound_statement(int new_scope,
 361                                                ast_node *statements)
 362 {
 363    this->new_scope = new_scope;
 364
 365    if (statements != NULL) {
 366       this->statements.push_degenerate_list_at_head(&statements->link);
 367    }
 368 }
 369
 370
 371 void
 372 ast_expression::print(void) const
 373 {
 374    switch (oper) {
 375    case ast_assign:
 376    case ast_mul_assign:
 377    case ast_div_assign:
 378    case ast_mod_assign:
 379    case ast_add_assign:
 380    case ast_sub_assign:
 381    case ast_ls_assign:
 382    case ast_rs_assign:
 383    case ast_and_assign:
 384    case ast_xor_assign:
 385    case ast_or_assign:
 386       subexpressions[0]->print();
 387       printf("%s ", operator_string(oper));
 388       subexpressions[1]->print();
 389       break;
 390
 391    case ast_field_selection:
 392       subexpressions[0]->print();
 393       printf(". %s ", primary_expression.identifier);
 394       break;
 395
 396    case ast_plus:
 397    case ast_neg:
 398    case ast_bit_not:
 399    case ast_logic_not:
 400    case ast_pre_inc:
 401    case ast_pre_dec:
 402       printf("%s ", operator_string(oper));
 403       subexpressions[0]->print();
 404       break;
 405
 406    case ast_post_inc:
 407    case ast_post_dec:
 408       subexpressions[0]->print();
 409       printf("%s ", operator_string(oper));
 410       break;
 411
 412    case ast_conditional:
 413       subexpressions[0]->print();
 414       printf("? ");
 415       subexpressions[1]->print();
 416       printf(": ");
 417       subexpressions[1]->print();
 418       break;
 419
 420    case ast_array_index:
 421       subexpressions[0]->print();
 422       printf("[ ");
 423       subexpressions[1]->print();
 424       printf("] ");
 425       break;
 426
 427    case ast_function_call: {
 428       subexpressions[0]->print();
 429       printf("( ");
 430
 431       foreach_list_const (n, &this->expressions) {
 432          if (n != this->expressions.get_head())
 433             printf(", ");
 434
 435          ast_node *ast = exec_node_data(ast_node, n, link);
 436          ast->print();
 437       }
 438
 439       printf(") ");
 440       break;
 441    }
 442
 443    case ast_identifier:
 444       printf("%s ", primary_expression.identifier);
 445       break;
 446
 447    case ast_int_constant:
 448       printf("%d ", primary_expression.int_constant);
 449       break;
 450
 451    case ast_uint_constant:
 452       printf("%u ", primary_expression.uint_constant);
 453       break;
 454
 455    case ast_float_constant:
 456       printf("%f ", primary_expression.float_constant);
 457       break;
 458
 459    case ast_bool_constant:
 460       printf("%s ",
 461              primary_expression.bool_constant
 462              ? "true" : "false");
 463       break;
 464
 465    case ast_sequence: {
 466       printf("( ");
 467       foreach_list_const(n, & this->expressions) {
 468          if (n != this->expressions.get_head())
 469             printf(", ");
 470
 471          ast_node *ast = exec_node_data(ast_node, n, link);
 472          ast->print();
 473       }
 474       printf(") ");
 475       break;
 476    }
 477
 478    default:
 479       assert(0);
 480       break;
 481    }
 482 }
 483
 484 ast_expression::ast_expression(int oper,
 485                                ast_expression *ex0,
 486                                ast_expression *ex1,
 487                                ast_expression *ex2)
 488 {
 489    this->oper = ast_operators(oper);
 490    this->subexpressions[0] = ex0;
 491    this->subexpressions[1] = ex1;
 492    this->subexpressions[2] = ex2;
 493 }
 494
 495
 496 void
 497 ast_expression_statement::print(void) const
 498 {
 499    if (expression)
 500       expression->print();
 501
 502    printf("; ");
 503 }
 504
 505
 506 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
 507    expression(ex)
 508 {
 509    /* empty */
 510 }
 511
 512
 513 void
 514 ast_function::print(void) const
 515 {
 516    return_type->print();
 517    printf(" %s (", identifier);
 518
 519    foreach_list_const(n, & this->parameters) {
 520       ast_node *ast = exec_node_data(ast_node, n, link);
 521       ast->print();
 522    }
 523
 524    printf(")");
 525 }
 526
 527
 528 ast_function::ast_function(void)
 529    : is_definition(false), signature(NULL)
 530 {
 531    /* empty */
 532 }
 533
 534
 535 void
 536 ast_fully_specified_type::print(void) const
 537 {
 538    _mesa_ast_type_qualifier_print(& qualifier);
 539    specifier->print();
 540 }
 541
 542
 543 void
 544 ast_parameter_declarator::print(void) const
 545 {
 546    type->print();
 547    if (identifier)
 548       printf("%s ", identifier);
 549    ast_opt_array_size_print(is_array, array_size);
 550 }
 551
 552
 553 void
 554 ast_function_definition::print(void) const
 555 {
 556    prototype->print();
 557    body->print();
 558 }
 559
 560
 561 void
 562 ast_declaration::print(void) const
 563 {
 564    printf("%s ", identifier);
 565    ast_opt_array_size_print(is_array, array_size);
 566
 567    if (initializer) {
 568       printf("= ");
 569       initializer->print();
 570    }
 571 }
 572
 573
 574 ast_declaration::ast_declaration(char *identifier, int is_array,
 575                                  ast_expression *array_size,
 576                                  ast_expression *initializer)
 577 {
 578    this->identifier = identifier;
 579    this->is_array = is_array;
 580    this->array_size = array_size;
 581    this->initializer = initializer;
 582 }
 583
 584
 585 void
 586 ast_declarator_list::print(void) const
 587 {
 588    assert(type || invariant);
 589
 590    if (type)
 591       type->print();
 592    else
 593       printf("invariant ");
 594
 595    foreach_list_const (ptr, & this->declarations) {
 596       if (ptr != this->declarations.get_head())
 597          printf(", ");
 598
 599       ast_node *ast = exec_node_data(ast_node, ptr, link);
 600       ast->print();
 601    }
 602
 603    printf("; ");
 604 }
 605
 606
 607 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
 608 {
 609    this->type = type;
 610    this->invariant = false;
 611 }
 612
 613 void
 614 ast_jump_statement::print(void) const
 615 {
 616    switch (mode) {
 617    case ast_continue:
 618       printf("continue; ");
 619       break;
 620    case ast_break:
 621       printf("break; ");
 622       break;
 623    case ast_return:
 624       printf("return ");
 625       if (opt_return_value)
 626          opt_return_value->print();
 627
 628       printf("; ");
 629       break;
 630    case ast_discard:
 631       printf("discard; ");
 632       break;
 633    }
 634 }
 635
 636
 637 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
 638 {
 639    this->mode = ast_jump_modes(mode);
 640
 641    if (mode == ast_return)
 642       opt_return_value = return_value;
 643 }
 644
 645
 646 void
 647 ast_selection_statement::print(void) const
 648 {
 649    printf("if ( ");
 650    condition->print();
 651    printf(") ");
 652
 653    then_statement->print();
 654
 655    if (else_statement) {
 656       printf("else ");
 657       else_statement->print();
 658    }
 659
 660 }
 661
 662
 663 ast_selection_statement::ast_selection_statement(ast_expression *condition,
 664                                                  ast_node *then_statement,
 665                                                  ast_node *else_statement)
 666 {
 667    this->condition = condition;
 668    this->then_statement = then_statement;
 669    this->else_statement = else_statement;
 670 }
 671
 672
 673 void
 674 ast_iteration_statement::print(void) const
 675 {
 676    switch (mode) {
 677    case ast_for:
 678       printf("for( ");
 679       if (init_statement)
 680          init_statement->print();
 681       printf("; ");
 682
 683       if (condition)
 684          condition->print();
 685       printf("; ");
 686
 687       if (rest_expression)
 688          rest_expression->print();
 689       printf(") ");
 690
 691       body->print();
 692       break;
 693
 694    case ast_while:
 695       printf("while ( ");
 696       if (condition)
 697          condition->print();
 698       printf(") ");
 699       body->print();
 700       break;
 701
 702    case ast_do_while:
 703       printf("do ");
 704       body->print();
 705       printf("while ( ");
 706       if (condition)
 707          condition->print();
 708       printf("); ");
 709       break;
 710    }
 711 }
 712
 713
 714 ast_iteration_statement::ast_iteration_statement(int mode,
 715                                                  ast_node *init,
 716                                                  ast_node *condition,
 717                                                  ast_expression *rest_expression,
 718                                                  ast_node *body)
 719 {
 720    this->mode = ast_iteration_modes(mode);
 721    this->init_statement = init;
 722    this->condition = condition;
 723    this->rest_expression = rest_expression;
 724    this->body = body;
 725 }
 726
 727
 728 void
 729 ast_struct_specifier::print(void) const
 730 {
 731    printf("struct %s { ", name);
 732    foreach_list_const(n, &this->declarations) {
 733       ast_node *ast = exec_node_data(ast_node, n, link);
 734       ast->print();
 735    }
 736    printf("} ");
 737 }
 738
 739
 740 ast_struct_specifier::ast_struct_specifier(char *identifier,
 741                                            ast_node *declarator_list)
 742 {
 743    if (identifier == NULL) {
 744       static unsigned anon_count = 1;
 745       identifier = ralloc_asprintf(this, "#anon_struct_%04x", anon_count);
 746       anon_count++;
 747    }
 748    name = identifier;
 749    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
 750 }
 751
 752 bool
 753 do_common_optimization(exec_list *ir, bool linked, unsigned max_unroll_iterations)
 754 {
 755    GLboolean progress = GL_FALSE;
 756
 757    progress = lower_instructions(ir, SUB_TO_ADD_NEG) || progress;
 758
 759    if (linked) {
 760       progress = do_function_inlining(ir) || progress;
 761       progress = do_dead_functions(ir) || progress;
 762    }
 763    progress = do_structure_splitting(ir) || progress;
 764    progress = do_if_simplification(ir) || progress;
 765    progress = do_discard_simplification(ir) || progress;
 766    progress = do_copy_propagation(ir) || progress;
 767    /*progress = do_copy_propagation_elements(ir) || progress;*/
 768    if (linked)
 769       progress = do_dead_code(ir) || progress;
 770    else
 771       progress = do_dead_code_unlinked(ir) || progress;
 772    progress = do_dead_code_local(ir) || progress;
 773    progress = do_tree_grafting(ir) || progress;
 774    progress = do_constant_propagation(ir) || progress;
 775    if (linked)
 776       progress = do_constant_variable(ir) || progress;
 777    else
 778       progress = do_constant_variable_unlinked(ir) || progress;
 779    progress = do_constant_folding(ir) || progress;
 780    progress = do_algebraic(ir) || progress;
 781    progress = do_lower_jumps(ir) || progress;
 782    progress = do_vec_index_to_swizzle(ir) || progress;
 783    progress = do_swizzle_swizzle(ir) || progress;
 784    progress = do_noop_swizzle(ir) || progress;
 785
 786    progress = optimize_redundant_jumps(ir) || progress;
 787
 788    loop_state *ls = analyze_loop_variables(ir);
 789    if (ls->loop_found) {
 790       progress = set_loop_controls(ir, ls) || progress;
 791       progress = unroll_loops(ir, ls, max_unroll_iterations) || progress;
 792    }
 793    delete ls;
 794
 795    return progress;
 796 }
 797
 798 extern "C" {
 799
 800 /**
 801  * To be called at GL teardown time, this frees compiler datastructures.
 802  *
 803  * After calling this, any previously compiled shaders and shader
 804  * programs would be invalid.  So this should happen at approximately
 805  * program exit.
 806  */
 807 void
 808 _mesa_destroy_shader_compiler(void)
 809 {
 810    _mesa_destroy_shader_compiler_caches();
 811
 812    _mesa_glsl_release_types();
 813 }
 814
 815 /**
 816  * Releases compiler caches to trade off performance for memory.
 817  *
 818  * Intended to be used with glReleaseShaderCompiler().
 819  */
 820 void
 821 _mesa_destroy_shader_compiler_caches(void)
 822 {
 823    _mesa_glsl_release_functions();
 824 }
 825
 826 }