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_texture_lod") == 0) {
 244       /* Force ARB_texture_rectangle to be on so sampler2DRects are defined */
 245       state->ARB_texture_rectangle_enable = true;
 246
 247       state->ARB_shader_texture_lod_enable = (ext_mode != extension_disable);
 248       state->ARB_shader_texture_lod_warn = (ext_mode == extension_warn);
 249
 250       unsupported = !state->extensions->ARB_shader_texture_lod;
 251    } else if (strcmp(name, "GL_ARB_shader_stencil_export") == 0) {
 252       state->ARB_shader_stencil_export_enable = (ext_mode != extension_disable);
 253       state->ARB_shader_stencil_export_warn = (ext_mode == extension_warn);
 254
 255       /* This extension is only supported in fragment shaders.
 256        */
 257       unsupported = (state->target != fragment_shader)
 258          || !state->extensions->ARB_shader_stencil_export;
 259    } else if (strcmp(name, "GL_AMD_conservative_depth") == 0) {
 260       /* The AMD_conservative spec does not forbid requiring the extension in
 261        * the vertex shader.
 262        */
 263       state->AMD_conservative_depth_enable = (ext_mode != extension_disable);
 264       state->AMD_conservative_depth_warn = (ext_mode == extension_warn);
 265       unsupported = !state->extensions->AMD_conservative_depth;
 266    } else if (strcmp(name, "GL_AMD_shader_stencil_export") == 0) {
 267       state->AMD_shader_stencil_export_enable = (ext_mode != extension_disable);
 268       state->AMD_shader_stencil_export_warn = (ext_mode == extension_warn);
 269
 270       /* This extension is only supported in fragment shaders.
 271        * Both the ARB and AMD variants share the same ARB flag
 272        * in gl_extensions.
 273        */
 274       unsupported = (state->target != fragment_shader)
 275          || !state->extensions->ARB_shader_stencil_export;
 276    } else if (strcmp(name, "GL_OES_texture_3D") == 0 && state->es_shader) {
 277       state->OES_texture_3D_enable = (ext_mode != extension_disable);
 278       state->OES_texture_3D_warn = (ext_mode == extension_warn);
 279
 280       unsupported = !state->extensions->EXT_texture3D;
 281    } else {
 282       unsupported = true;
 283    }
 284
 285    if (unsupported) {
 286       static const char *const fmt = "extension `%s' unsupported in %s shader";
 287
 288       if (ext_mode == extension_require) {
 289          _mesa_glsl_error(name_locp, state, fmt,
 290                           name, _mesa_glsl_shader_target_name(state->target));
 291          return false;
 292       } else {
 293          _mesa_glsl_warning(name_locp, state, fmt,
 294                             name, _mesa_glsl_shader_target_name(state->target));
 295       }
 296    }
 297
 298    return true;
 299 }
 300
 301 void
 302 _mesa_ast_type_qualifier_print(const struct ast_type_qualifier *q)
 303 {
 304    if (q->flags.q.constant)
 305       printf("const ");
 306
 307    if (q->flags.q.invariant)
 308       printf("invariant ");
 309
 310    if (q->flags.q.attribute)
 311       printf("attribute ");
 312
 313    if (q->flags.q.varying)
 314       printf("varying ");
 315
 316    if (q->flags.q.in && q->flags.q.out)
 317       printf("inout ");
 318    else {
 319       if (q->flags.q.in)
 320          printf("in ");
 321
 322       if (q->flags.q.out)
 323          printf("out ");
 324    }
 325
 326    if (q->flags.q.centroid)
 327       printf("centroid ");
 328    if (q->flags.q.uniform)
 329       printf("uniform ");
 330    if (q->flags.q.smooth)
 331       printf("smooth ");
 332    if (q->flags.q.flat)
 333       printf("flat ");
 334    if (q->flags.q.noperspective)
 335       printf("noperspective ");
 336 }
 337
 338
 339 void
 340 ast_node::print(void) const
 341 {
 342    printf("unhandled node ");
 343 }
 344
 345
 346 ast_node::ast_node(void)
 347 {
 348    this->location.source = 0;
 349    this->location.line = 0;
 350    this->location.column = 0;
 351 }
 352
 353
 354 static void
 355 ast_opt_array_size_print(bool is_array, const ast_expression *array_size)
 356 {
 357    if (is_array) {
 358       printf("[ ");
 359
 360       if (array_size)
 361          array_size->print();
 362
 363       printf("] ");
 364    }
 365 }
 366
 367
 368 void
 369 ast_compound_statement::print(void) const
 370 {
 371    printf("{\n");
 372
 373    foreach_list_const(n, &this->statements) {
 374       ast_node *ast = exec_node_data(ast_node, n, link);
 375       ast->print();
 376    }
 377
 378    printf("}\n");
 379 }
 380
 381
 382 ast_compound_statement::ast_compound_statement(int new_scope,
 383                                                ast_node *statements)
 384 {
 385    this->new_scope = new_scope;
 386
 387    if (statements != NULL) {
 388       this->statements.push_degenerate_list_at_head(&statements->link);
 389    }
 390 }
 391
 392
 393 void
 394 ast_expression::print(void) const
 395 {
 396    switch (oper) {
 397    case ast_assign:
 398    case ast_mul_assign:
 399    case ast_div_assign:
 400    case ast_mod_assign:
 401    case ast_add_assign:
 402    case ast_sub_assign:
 403    case ast_ls_assign:
 404    case ast_rs_assign:
 405    case ast_and_assign:
 406    case ast_xor_assign:
 407    case ast_or_assign:
 408       subexpressions[0]->print();
 409       printf("%s ", operator_string(oper));
 410       subexpressions[1]->print();
 411       break;
 412
 413    case ast_field_selection:
 414       subexpressions[0]->print();
 415       printf(". %s ", primary_expression.identifier);
 416       break;
 417
 418    case ast_plus:
 419    case ast_neg:
 420    case ast_bit_not:
 421    case ast_logic_not:
 422    case ast_pre_inc:
 423    case ast_pre_dec:
 424       printf("%s ", operator_string(oper));
 425       subexpressions[0]->print();
 426       break;
 427
 428    case ast_post_inc:
 429    case ast_post_dec:
 430       subexpressions[0]->print();
 431       printf("%s ", operator_string(oper));
 432       break;
 433
 434    case ast_conditional:
 435       subexpressions[0]->print();
 436       printf("? ");
 437       subexpressions[1]->print();
 438       printf(": ");
 439       subexpressions[1]->print();
 440       break;
 441
 442    case ast_array_index:
 443       subexpressions[0]->print();
 444       printf("[ ");
 445       subexpressions[1]->print();
 446       printf("] ");
 447       break;
 448
 449    case ast_function_call: {
 450       subexpressions[0]->print();
 451       printf("( ");
 452
 453       foreach_list_const (n, &this->expressions) {
 454          if (n != this->expressions.get_head())
 455             printf(", ");
 456
 457          ast_node *ast = exec_node_data(ast_node, n, link);
 458          ast->print();
 459       }
 460
 461       printf(") ");
 462       break;
 463    }
 464
 465    case ast_identifier:
 466       printf("%s ", primary_expression.identifier);
 467       break;
 468
 469    case ast_int_constant:
 470       printf("%d ", primary_expression.int_constant);
 471       break;
 472
 473    case ast_uint_constant:
 474       printf("%u ", primary_expression.uint_constant);
 475       break;
 476
 477    case ast_float_constant:
 478       printf("%f ", primary_expression.float_constant);
 479       break;
 480
 481    case ast_bool_constant:
 482       printf("%s ",
 483              primary_expression.bool_constant
 484              ? "true" : "false");
 485       break;
 486
 487    case ast_sequence: {
 488       printf("( ");
 489       foreach_list_const(n, & this->expressions) {
 490          if (n != this->expressions.get_head())
 491             printf(", ");
 492
 493          ast_node *ast = exec_node_data(ast_node, n, link);
 494          ast->print();
 495       }
 496       printf(") ");
 497       break;
 498    }
 499
 500    default:
 501       assert(0);
 502       break;
 503    }
 504 }
 505
 506 ast_expression::ast_expression(int oper,
 507                                ast_expression *ex0,
 508                                ast_expression *ex1,
 509                                ast_expression *ex2)
 510 {
 511    this->oper = ast_operators(oper);
 512    this->subexpressions[0] = ex0;
 513    this->subexpressions[1] = ex1;
 514    this->subexpressions[2] = ex2;
 515 }
 516
 517
 518 void
 519 ast_expression_statement::print(void) const
 520 {
 521    if (expression)
 522       expression->print();
 523
 524    printf("; ");
 525 }
 526
 527
 528 ast_expression_statement::ast_expression_statement(ast_expression *ex) :
 529    expression(ex)
 530 {
 531    /* empty */
 532 }
 533
 534
 535 void
 536 ast_function::print(void) const
 537 {
 538    return_type->print();
 539    printf(" %s (", identifier);
 540
 541    foreach_list_const(n, & this->parameters) {
 542       ast_node *ast = exec_node_data(ast_node, n, link);
 543       ast->print();
 544    }
 545
 546    printf(")");
 547 }
 548
 549
 550 ast_function::ast_function(void)
 551    : is_definition(false), signature(NULL)
 552 {
 553    /* empty */
 554 }
 555
 556
 557 void
 558 ast_fully_specified_type::print(void) const
 559 {
 560    _mesa_ast_type_qualifier_print(& qualifier);
 561    specifier->print();
 562 }
 563
 564
 565 void
 566 ast_parameter_declarator::print(void) const
 567 {
 568    type->print();
 569    if (identifier)
 570       printf("%s ", identifier);
 571    ast_opt_array_size_print(is_array, array_size);
 572 }
 573
 574
 575 void
 576 ast_function_definition::print(void) const
 577 {
 578    prototype->print();
 579    body->print();
 580 }
 581
 582
 583 void
 584 ast_declaration::print(void) const
 585 {
 586    printf("%s ", identifier);
 587    ast_opt_array_size_print(is_array, array_size);
 588
 589    if (initializer) {
 590       printf("= ");
 591       initializer->print();
 592    }
 593 }
 594
 595
 596 ast_declaration::ast_declaration(char *identifier, int is_array,
 597                                  ast_expression *array_size,
 598                                  ast_expression *initializer)
 599 {
 600    this->identifier = identifier;
 601    this->is_array = is_array;
 602    this->array_size = array_size;
 603    this->initializer = initializer;
 604 }
 605
 606
 607 void
 608 ast_declarator_list::print(void) const
 609 {
 610    assert(type || invariant);
 611
 612    if (type)
 613       type->print();
 614    else
 615       printf("invariant ");
 616
 617    foreach_list_const (ptr, & this->declarations) {
 618       if (ptr != this->declarations.get_head())
 619          printf(", ");
 620
 621       ast_node *ast = exec_node_data(ast_node, ptr, link);
 622       ast->print();
 623    }
 624
 625    printf("; ");
 626 }
 627
 628
 629 ast_declarator_list::ast_declarator_list(ast_fully_specified_type *type)
 630 {
 631    this->type = type;
 632    this->invariant = false;
 633 }
 634
 635 void
 636 ast_jump_statement::print(void) const
 637 {
 638    switch (mode) {
 639    case ast_continue:
 640       printf("continue; ");
 641       break;
 642    case ast_break:
 643       printf("break; ");
 644       break;
 645    case ast_return:
 646       printf("return ");
 647       if (opt_return_value)
 648          opt_return_value->print();
 649
 650       printf("; ");
 651       break;
 652    case ast_discard:
 653       printf("discard; ");
 654       break;
 655    }
 656 }
 657
 658
 659 ast_jump_statement::ast_jump_statement(int mode, ast_expression *return_value)
 660 {
 661    this->mode = ast_jump_modes(mode);
 662
 663    if (mode == ast_return)
 664       opt_return_value = return_value;
 665 }
 666
 667
 668 void
 669 ast_selection_statement::print(void) const
 670 {
 671    printf("if ( ");
 672    condition->print();
 673    printf(") ");
 674
 675    then_statement->print();
 676
 677    if (else_statement) {
 678       printf("else ");
 679       else_statement->print();
 680    }
 681
 682 }
 683
 684
 685 ast_selection_statement::ast_selection_statement(ast_expression *condition,
 686                                                  ast_node *then_statement,
 687                                                  ast_node *else_statement)
 688 {
 689    this->condition = condition;
 690    this->then_statement = then_statement;
 691    this->else_statement = else_statement;
 692 }
 693
 694
 695 void
 696 ast_iteration_statement::print(void) const
 697 {
 698    switch (mode) {
 699    case ast_for:
 700       printf("for( ");
 701       if (init_statement)
 702          init_statement->print();
 703       printf("; ");
 704
 705       if (condition)
 706          condition->print();
 707       printf("; ");
 708
 709       if (rest_expression)
 710          rest_expression->print();
 711       printf(") ");
 712
 713       body->print();
 714       break;
 715
 716    case ast_while:
 717       printf("while ( ");
 718       if (condition)
 719          condition->print();
 720       printf(") ");
 721       body->print();
 722       break;
 723
 724    case ast_do_while:
 725       printf("do ");
 726       body->print();
 727       printf("while ( ");
 728       if (condition)
 729          condition->print();
 730       printf("); ");
 731       break;
 732    }
 733 }
 734
 735
 736 ast_iteration_statement::ast_iteration_statement(int mode,
 737                                                  ast_node *init,
 738                                                  ast_node *condition,
 739                                                  ast_expression *rest_expression,
 740                                                  ast_node *body)
 741 {
 742    this->mode = ast_iteration_modes(mode);
 743    this->init_statement = init;
 744    this->condition = condition;
 745    this->rest_expression = rest_expression;
 746    this->body = body;
 747 }
 748
 749
 750 void
 751 ast_struct_specifier::print(void) const
 752 {
 753    printf("struct %s { ", name);
 754    foreach_list_const(n, &this->declarations) {
 755       ast_node *ast = exec_node_data(ast_node, n, link);
 756       ast->print();
 757    }
 758    printf("} ");
 759 }
 760
 761
 762 ast_struct_specifier::ast_struct_specifier(char *identifier,
 763                                            ast_node *declarator_list)
 764 {
 765    if (identifier == NULL) {
 766       static unsigned anon_count = 1;
 767       identifier = ralloc_asprintf(this, "#anon_struct_%04x", anon_count);
 768       anon_count++;
 769    }
 770    name = identifier;
 771    this->declarations.push_degenerate_list_at_head(&declarator_list->link);
 772 }
 773
 774 bool
 775 do_common_optimization(exec_list *ir, bool linked, unsigned max_unroll_iterations)
 776 {
 777    GLboolean progress = GL_FALSE;
 778
 779    progress = lower_instructions(ir, SUB_TO_ADD_NEG) || progress;
 780
 781    if (linked) {
 782       progress = do_function_inlining(ir) || progress;
 783       progress = do_dead_functions(ir) || progress;
 784    }
 785    progress = do_structure_splitting(ir) || progress;
 786    progress = do_if_simplification(ir) || progress;
 787    progress = do_discard_simplification(ir) || progress;
 788    progress = do_copy_propagation(ir) || progress;
 789    progress = do_copy_propagation_elements(ir) || progress;
 790    if (linked)
 791       progress = do_dead_code(ir) || progress;
 792    else
 793       progress = do_dead_code_unlinked(ir) || progress;
 794    progress = do_dead_code_local(ir) || progress;
 795    progress = do_tree_grafting(ir) || progress;
 796    progress = do_constant_propagation(ir) || progress;
 797    if (linked)
 798       progress = do_constant_variable(ir) || progress;
 799    else
 800       progress = do_constant_variable_unlinked(ir) || progress;
 801    progress = do_constant_folding(ir) || progress;
 802    progress = do_algebraic(ir) || progress;
 803    progress = do_lower_jumps(ir) || progress;
 804    progress = do_vec_index_to_swizzle(ir) || progress;
 805    progress = do_swizzle_swizzle(ir) || progress;
 806    progress = do_noop_swizzle(ir) || progress;
 807
 808    progress = optimize_redundant_jumps(ir) || progress;
 809
 810    loop_state *ls = analyze_loop_variables(ir);
 811    if (ls->loop_found) {
 812       progress = set_loop_controls(ir, ls) || progress;
 813       progress = unroll_loops(ir, ls, max_unroll_iterations) || progress;
 814    }
 815    delete ls;
 816
 817    return progress;
 818 }
 819
 820 extern "C" {
 821
 822 /**
 823  * To be called at GL teardown time, this frees compiler datastructures.
 824  *
 825  * After calling this, any previously compiled shaders and shader
 826  * programs would be invalid.  So this should happen at approximately
 827  * program exit.
 828  */
 829 void
 830 _mesa_destroy_shader_compiler(void)
 831 {
 832    _mesa_destroy_shader_compiler_caches();
 833
 834    _mesa_glsl_release_types();
 835 }
 836
 837 /**
 838  * Releases compiler caches to trade off performance for memory.
 839  *
 840  * Intended to be used with glReleaseShaderCompiler().
 841  */
 842 void
 843 _mesa_destroy_shader_compiler_caches(void)
 844 {
 845    _mesa_glsl_release_functions();
 846 }
 847
 848 }