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 if (strcmp(name, "GL_OES_texture_3D") == 0 && state->es_shader) {
 260       state->OES_texture_3D_enable = (ext_mode != extension_disable);
 261       state->OES_texture_3D_warn = (ext_mode == extension_warn);
 262
 263       unsupported = !state->extensions->EXT_texture3D;
 264    } else {
 265       unsupported = true;
 266    }
 267
 268    if (unsupported) {
 269       static const char *const fmt = "extension `%s' unsupported in %s shader";
 270
 271       if (ext_mode == extension_require) {
 272          _mesa_glsl_error(name_locp, state, fmt,
 273                           name, _mesa_glsl_shader_target_name(state->target));
 274          return false;
 275       } else {
 276          _mesa_glsl_warning(name_locp, state, fmt,
 277                             name, _mesa_glsl_shader_target_name(state->target));
 278       }
 279    }
 280
 281    return true;
 282 }
 283
 284 void
 285 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
 286 {
 287    if (q->flags.q.constant)
 288       printf("const ");
 289
 290    if (q->flags.q.invariant)
 291       printf("invariant ");
 292
 293    if (q->flags.q.attribute)
 294       printf("attribute ");
 295
 296    if (q->flags.q.varying)
 297       printf("varying ");
 298
 299    if (q->flags.q.in && q->flags.q.out)
 300       printf("inout ");
 301    else {
 302       if (q->flags.q.in)
 303          printf("in ");
 304
 305       if (q->flags.q.out)
 306          printf("out ");
 307    }
 308
 309    if (q->flags.q.centroid)
 310       printf("centroid ");
 311    if (q->flags.q.uniform)
 312       printf("uniform ");
 313    if (q->flags.q.smooth)
 314       printf("smooth ");
 315    if (q->flags.q.flat)
 316       printf("flat ");
 317    if (q->flags.q.noperspective)
 318       printf("noperspective ");
 319 }
 320
 321
 322 void
 323 ast_node::print(void) const
 324 {
 325    printf("unhandled node ");
 326 }
 327
 328
 329 ast_node::ast_node(void)
 330 {
 331    this->location.source = 0;
 332    this->location.line = 0;
 333    this->location.column = 0;
 334 }
 335
 336
 337 static void
 338 ast_opt_array_size_print(bool is_array, const ast_expression *array_size)
 339 {
 340    if (is_array) {
 341       printf("[ ");
 342
 343       if (array_size)
 344          array_size->print();
 345
 346       printf("] ");
 347    }
 348 }
 349
 350
 351 void
 352 ast_compound_statement::print(void) const
 353 {
 354    printf("{\n");
 355
 356    foreach_list_const(n, &this->statements) {
 357       ast_node *ast = exec_node_data(ast_node, n, link);
 358       ast->print();
 359    }
 360
 361    printf("}\n");
 362 }
 363
 364
 365 ast_compound_statement::ast_compound_statement(int new_scope,
 366                                                ast_node *statements)
 367 {
 368    this->new_scope = new_scope;
 369
 370    if (statements != NULL) {
 371       this->statements.push_degenerate_list_at_head(&statements->link);
 372    }
 373 }
 374
 375
 376 void
 377 ast_expression::print(void) const
 378 {
 379    switch (oper) {
 380    case ast_assign:
 381    case ast_mul_assign:
 382    case ast_div_assign:
 383    case ast_mod_assign:
 384    case ast_add_assign:
 385    case ast_sub_assign:
 386    case ast_ls_assign:
 387    case ast_rs_assign:
 388    case ast_and_assign:
 389    case ast_xor_assign:
 390    case ast_or_assign:
 391       subexpressions[0]->print();
 392       printf("%s ", operator_string(oper));
 393       subexpressions[1]->print();
 394       break;
 395
 396    case ast_field_selection:
 397       subexpressions[0]->print();
 398       printf(". %s ", primary_expression.identifier);
 399       break;
 400
 401    case ast_plus:
 402    case ast_neg:
 403    case ast_bit_not:
 404    case ast_logic_not:
 405    case ast_pre_inc:
 406    case ast_pre_dec:
 407       printf("%s ", operator_string(oper));
 408       subexpressions[0]->print();
 409       break;
 410
 411    case ast_post_inc:
 412    case ast_post_dec:
 413       subexpressions[0]->print();
 414       printf("%s ", operator_string(oper));
 415       break;
 416
 417    case ast_conditional:
 418       subexpressions[0]->print();
 419       printf("? ");
 420       subexpressions[1]->print();
 421       printf(": ");
 422       subexpressions[1]->print();
 423       break;
 424
 425    case ast_array_index:
 426       subexpressions[0]->print();
 427       printf("[ ");
 428       subexpressions[1]->print();
 429       printf("] ");
 430       break;
 431
 432    case ast_function_call: {
 433       subexpressions[0]->print();
 434       printf("( ");
 435
 436       foreach_list_const (n, &this->expressions) {
 437          if (n != this->expressions.get_head())
 438             printf(", ");
 439
 440          ast_node *ast = exec_node_data(ast_node, n, link);
 441          ast->print();
 442       }
 443
 444       printf(") ");
 445       break;
 446    }
 447
 448    case ast_identifier:
 449       printf("%s ", primary_expression.identifier);
 450       break;
 451
 452    case ast_int_constant:
 453       printf("%d ", primary_expression.int_constant);
 454       break;
 455
 456    case ast_uint_constant:
 457       printf("%u ", primary_expression.uint_constant);
 458       break;
 459
 460    case ast_float_constant:
 461       printf("%f ", primary_expression.float_constant);
 462       break;
 463
 464    case ast_bool_constant:
 465       printf("%s ",
 466              primary_expression.bool_constant
 467              ? "true" : "false");
 468       break;
 469
 470    case ast_sequence: {
 471       printf("( ");
 472       foreach_list_const(n, & this->expressions) {
 473          if (n != this->expressions.get_head())
 474             printf(", ");
 475
 476          ast_node *ast = exec_node_data(ast_node, n, link);
 477          ast->print();
 478       }
 479       printf(") ");
 480       break;
 481    }
 482
 483    default:
 484       assert(0);
 485       break;
 486    }
 487 }
 488
 489 ast_expression::ast_expression(int oper,
 490                                ast_expression *ex0,
 491                                ast_expression *ex1,
 492                                ast_expression *ex2)
 493 {
 494    this->oper = ast_operators(oper);
 495    this->subexpressions[0] = ex0;
 496    this->subexpressions[1] = ex1;
 497    this->subexpressions[2] = ex2;
 498 }
 499
 500
 501 void
 502 ast_expression_statement::print(void) const
 503 {
 504    if (expression)
 505       expression->print();
 506
 507    printf("; ");
 508 }
 509
 510
 511 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
 512    expression(ex)
 513 {
 514    /* empty */
 515 }
 516
 517
 518 void
 519 ast_function::print(void) const
 520 {
 521    return_type->print();
 522    printf(" %s (", identifier);
 523
 524    foreach_list_const(n, & this->parameters) {
 525       ast_node *ast = exec_node_data(ast_node, n, link);
 526       ast->print();
 527    }
 528
 529    printf(")");
 530 }
 531
 532
 533 ast_function::ast_function(void)
 534    : is_definition(false), signature(NULL)
 535 {
 536    /* empty */
 537 }
 538
 539
 540 void
 541 ast_fully_specified_type::print(void) const
 542 {
 543    _mesa_ast_type_qualifier_print(& qualifier);
 544    specifier->print();
 545 }
 546
 547
 548 void
 549 ast_parameter_declarator::print(void) const
 550 {
 551    type->print();
 552    if (identifier)
 553       printf("%s ", identifier);
 554    ast_opt_array_size_print(is_array, array_size);
 555 }
 556
 557
 558 void
 559 ast_function_definition::print(void) const
 560 {
 561    prototype->print();
 562    body->print();
 563 }
 564
 565
 566 void
 567 ast_declaration::print(void) const
 568 {
 569    printf("%s ", identifier);
 570    ast_opt_array_size_print(is_array, array_size);
 571
 572    if (initializer) {
 573       printf("= ");
 574       initializer->print();
 575    }
 576 }
 577
 578
 579 ast_declaration::ast_declaration(char *identifier, int is_array,
 580                                  ast_expression *array_size,
 581                                  ast_expression *initializer)
 582 {
 583    this->identifier = identifier;
 584    this->is_array = is_array;
 585    this->array_size = array_size;
 586    this->initializer = initializer;
 587 }
 588
 589
 590 void
 591 ast_declarator_list::print(void) const
 592 {
 593    assert(type || invariant);
 594
 595    if (type)
 596       type->print();
 597    else
 598       printf("invariant ");
 599
 600    foreach_list_const (ptr, & this->declarations) {
 601       if (ptr != this->declarations.get_head())
 602          printf(", ");
 603
 604       ast_node *ast = exec_node_data(ast_node, ptr, link);
 605       ast->print();
 606    }
 607
 608    printf("; ");
 609 }
 610
 611
 612 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
 613 {
 614    this->type = type;
 615    this->invariant = false;
 616 }
 617
 618 void
 619 ast_jump_statement::print(void) const
 620 {
 621    switch (mode) {
 622    case ast_continue:
 623       printf("continue; ");
 624       break;
 625    case ast_break:
 626       printf("break; ");
 627       break;
 628    case ast_return:
 629       printf("return ");
 630       if (opt_return_value)
 631          opt_return_value->print();
 632
 633       printf("; ");
 634       break;
 635    case ast_discard:
 636       printf("discard; ");
 637       break;
 638    }
 639 }
 640
 641
 642 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
 643 {
 644    this->mode = ast_jump_modes(mode);
 645
 646    if (mode == ast_return)
 647       opt_return_value = return_value;
 648 }
 649
 650
 651 void
 652 ast_selection_statement::print(void) const
 653 {
 654    printf("if ( ");
 655    condition->print();
 656    printf(") ");
 657
 658    then_statement->print();
 659
 660    if (else_statement) {
 661       printf("else ");
 662       else_statement->print();
 663    }
 664
 665 }
 666
 667
 668 ast_selection_statement::ast_selection_statement(ast_expression *condition,
 669                                                  ast_node *then_statement,
 670                                                  ast_node *else_statement)
 671 {
 672    this->condition = condition;
 673    this->then_statement = then_statement;
 674    this->else_statement = else_statement;
 675 }
 676
 677
 678 void
 679 ast_iteration_statement::print(void) const
 680 {
 681    switch (mode) {
 682    case ast_for:
 683       printf("for( ");
 684       if (init_statement)
 685          init_statement->print();
 686       printf("; ");
 687
 688       if (condition)
 689          condition->print();
 690       printf("; ");
 691
 692       if (rest_expression)
 693          rest_expression->print();
 694       printf(") ");
 695
 696       body->print();
 697       break;
 698
 699    case ast_while:
 700       printf("while ( ");
 701       if (condition)
 702          condition->print();
 703       printf(") ");
 704       body->print();
 705       break;
 706
 707    case ast_do_while:
 708       printf("do ");
 709       body->print();
 710       printf("while ( ");
 711       if (condition)
 712          condition->print();
 713       printf("); ");
 714       break;
 715    }
 716 }
 717
 718
 719 ast_iteration_statement::ast_iteration_statement(int mode,
 720                                                  ast_node *init,
 721                                                  ast_node *condition,
 722                                                  ast_expression *rest_expression,
 723                                                  ast_node *body)
 724 {
 725    this->mode = ast_iteration_modes(mode);
 726    this->init_statement = init;
 727    this->condition = condition;
 728    this->rest_expression = rest_expression;
 729    this->body = body;
 730 }
 731
 732
 733 void
 734 ast_struct_specifier::print(void) const
 735 {
 736    printf("struct %s { ", name);
 737    foreach_list_const(n, &this->declarations) {
 738       ast_node *ast = exec_node_data(ast_node, n, link);
 739       ast->print();
 740    }
 741    printf("} ");
 742 }
 743
 744
 745 ast_struct_specifier::ast_struct_specifier(char *identifier,
 746                                            ast_node *declarator_list)
 747 {
 748    if (identifier == NULL) {
 749       static unsigned anon_count = 1;
 750       identifier = ralloc_asprintf(this, "#anon_struct_%04x", anon_count);
 751       anon_count++;
 752    }
 753    name = identifier;
 754    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
 755 }
 756
 757 bool
 758 do_common_optimization(exec_list *ir, bool linked, unsigned max_unroll_iterations)
 759 {
 760    GLboolean progress = GL_FALSE;
 761
 762    progress = lower_instructions(ir, SUB_TO_ADD_NEG) || progress;
 763
 764    if (linked) {
 765       progress = do_function_inlining(ir) || progress;
 766       progress = do_dead_functions(ir) || progress;
 767    }
 768    progress = do_structure_splitting(ir) || progress;
 769    progress = do_if_simplification(ir) || progress;
 770    progress = do_discard_simplification(ir) || progress;
 771    progress = do_copy_propagation(ir) || progress;
 772    /*progress = do_copy_propagation_elements(ir) || progress;*/
 773    if (linked)
 774       progress = do_dead_code(ir) || progress;
 775    else
 776       progress = do_dead_code_unlinked(ir) || progress;
 777    progress = do_dead_code_local(ir) || progress;
 778    progress = do_tree_grafting(ir) || progress;
 779    progress = do_constant_propagation(ir) || progress;
 780    if (linked)
 781       progress = do_constant_variable(ir) || progress;
 782    else
 783       progress = do_constant_variable_unlinked(ir) || progress;
 784    progress = do_constant_folding(ir) || progress;
 785    progress = do_algebraic(ir) || progress;
 786    progress = do_lower_jumps(ir) || progress;
 787    progress = do_vec_index_to_swizzle(ir) || progress;
 788    progress = do_swizzle_swizzle(ir) || progress;
 789    progress = do_noop_swizzle(ir) || progress;
 790
 791    progress = optimize_redundant_jumps(ir) || progress;
 792
 793    loop_state *ls = analyze_loop_variables(ir);
 794    if (ls->loop_found) {
 795       progress = set_loop_controls(ir, ls) || progress;
 796       progress = unroll_loops(ir, ls, max_unroll_iterations) || progress;
 797    }
 798    delete ls;
 799
 800    return progress;
 801 }
 802
 803 extern "C" {
 804
 805 /**
 806  * To be called at GL teardown time, this frees compiler datastructures.
 807  *
 808  * After calling this, any previously compiled shaders and shader
 809  * programs would be invalid.  So this should happen at approximately
 810  * program exit.
 811  */
 812 void
 813 _mesa_destroy_shader_compiler(void)
 814 {
 815    _mesa_destroy_shader_compiler_caches();
 816
 817    _mesa_glsl_release_types();
 818 }
 819
 820 /**
 821  * Releases compiler caches to trade off performance for memory.
 822  *
 823  * Intended to be used with glReleaseShaderCompiler().
 824  */
 825 void
 826 _mesa_destroy_shader_compiler_caches(void)
 827 {
 828    _mesa_glsl_release_functions();
 829 }
 830
 831 }