nsz Git - cparser/blob - ast2firm.c

   1 #include <config.h>
   2
   3 #define _GNU_SOURCE
   4
   5 #include <assert.h>
   6 #include <string.h>
   7 #include <stdbool.h>
   8
   9 #include <libfirm/firm.h>
  10 #include <libfirm/adt/obst.h>
  11
  12 #include "ast2firm.h"
  13
  14 #include "adt/error.h"
  15 #include "adt/array.h"
  16 #include "token_t.h"
  17 #include "type_t.h"
  18 #include "ast_t.h"
  19
  20 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  21
  22 static ir_type *ir_type_const_char;
  23 static ir_type *ir_type_void;
  24 static ir_type *ir_type_int;
  25 static ir_type *ir_type_void_ptr;
  26
  27 static type_t *type_const_char;
  28 static type_t *type_void;
  29 static type_t *type_int;
  30
  31 static int       next_value_number_function;
  32 static ir_node  *continue_label;
  33 static ir_node  *break_label;
  34 static ir_node  *current_switch_cond;
  35 static ir_node **imature_blocks;
  36
  37 typedef enum declaration_type_t {
  38         DECLARATION_TYPE_UNKNOWN,
  39         DECLARATION_TYPE_FUNCTION,
  40         DECLARATION_TYPE_GLOBAL_VARIABLE,
  41         DECLARATION_TYPE_LOCAL_VARIABLE,
  42         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  43         DECLARATION_TYPE_COMPOUND_MEMBER,
  44         DECLARATION_TYPE_LABEL_BLOCK,
  45 } declaration_type_t;
  46
  47 static ir_type *get_ir_type(type_t *type);
  48
  49 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  50 {
  51         (void) pos;
  52 #if 0
  53         const declaration_t *declaration = & value_numbers[pos]->declaration;
  54
  55         print_warning_prefix(declaration->source_position);
  56         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  57                         declaration->symbol->string);
  58 #endif
  59         fprintf(stderr, "Some variable might be used uninitialized\n");
  60         return new_r_Unknown(irg, mode);
  61 }
  62
  63 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  64 {
  65         const source_position_t *pos = (const source_position_t*) dbg;
  66         if(pos == NULL)
  67                 return 0;
  68         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  69                                    pos->linenr);
  70 }
  71
  72 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  73 {
  74         const source_position_t *pos = (const source_position_t*) dbg;
  75         if(pos == NULL)
  76                 return NULL;
  77         if(line != NULL)
  78                 *line = pos->linenr;
  79         return pos->input_name;
  80 }
  81
  82 void init_ast2firm(void)
  83 {
  84         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  85         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, 0);
  86         type_int        = make_atomic_type(ATOMIC_TYPE_INT, 0);
  87
  88         ir_type_int        = get_ir_type(type_int);
  89         ir_type_const_char = get_ir_type(type_const_char);
  90         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  91                                                        type in firm */
  92         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
  93                                               ir_type_void, mode_P_data);
  94
  95         type_void->firm_type = ir_type_void;
  96 }
  97
  98 void exit_ast2firm(void)
  99 {
 100 }
 101
 102 static unsigned unique_id = 0;
 103
 104 static ident *unique_ident(const char *tag)
 105 {
 106         char buf[256];
 107
 108         snprintf(buf, sizeof(buf), "%s.%d", tag, unique_id);
 109         unique_id++;
 110         return new_id_from_str(buf);
 111 }
 112
 113 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 114 {
 115         switch(atomic_type->atype) {
 116         case ATOMIC_TYPE_SCHAR:
 117         case ATOMIC_TYPE_CHAR:
 118                 return mode_Bs;
 119         case ATOMIC_TYPE_UCHAR:
 120                 return mode_Bu;
 121         case ATOMIC_TYPE_SHORT:
 122                 return mode_Hs;
 123         case ATOMIC_TYPE_USHORT:
 124                 return mode_Hu;
 125         case ATOMIC_TYPE_LONG:
 126         case ATOMIC_TYPE_INT:
 127                 return mode_Is;
 128         case ATOMIC_TYPE_ULONG:
 129         case ATOMIC_TYPE_UINT:
 130                 return mode_Iu;
 131         case ATOMIC_TYPE_LONGLONG:
 132                 return mode_Ls;
 133         case ATOMIC_TYPE_ULONGLONG:
 134                 return mode_Lu;
 135         case ATOMIC_TYPE_FLOAT:
 136                 return mode_F;
 137         case ATOMIC_TYPE_DOUBLE:
 138                 return mode_D;
 139         case ATOMIC_TYPE_LONG_DOUBLE:
 140                 return mode_E;
 141         case ATOMIC_TYPE_BOOL:
 142                 return mode_b;
 143 #ifdef PROVIDE_COMPLEX
 144         case ATOMIC_TYPE_FLOAT_COMPLEX:
 145         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 146         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 147                 panic("complex lowering not implemented yet");
 148                 break;
 149         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 150         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 151         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 152                 panic("imaginary lowering not implemented yet");
 153                 break;
 154 #endif
 155         case ATOMIC_TYPE_VOID:
 156                 /* firm has no real void... */
 157                 return mode_Is;
 158         case ATOMIC_TYPE_INVALID:
 159                 break;
 160         }
 161         panic("Encountered unknown atomic type");
 162 }
 163
 164
 165 static unsigned get_type_size(type_t *type);
 166
 167 static unsigned get_atomic_type_size(const atomic_type_t *type)
 168 {
 169         switch(type->atype) {
 170         case ATOMIC_TYPE_CHAR:
 171         case ATOMIC_TYPE_SCHAR:
 172         case ATOMIC_TYPE_UCHAR:
 173                 return 1;
 174
 175         case ATOMIC_TYPE_SHORT:
 176         case ATOMIC_TYPE_USHORT:
 177                 return 2;
 178
 179         case ATOMIC_TYPE_BOOL:
 180         case ATOMIC_TYPE_INT:
 181         case ATOMIC_TYPE_UINT:
 182         case ATOMIC_TYPE_LONG:
 183         case ATOMIC_TYPE_ULONG:
 184         case ATOMIC_TYPE_FLOAT:
 185                 return 4;
 186
 187         case ATOMIC_TYPE_LONGLONG:
 188         case ATOMIC_TYPE_ULONGLONG:
 189         case ATOMIC_TYPE_DOUBLE:
 190                 return 8;
 191
 192         case ATOMIC_TYPE_LONG_DOUBLE:
 193                 return 12;
 194
 195         case ATOMIC_TYPE_VOID:
 196                 return 1;
 197
 198         case ATOMIC_TYPE_INVALID:
 199                 break;
 200         }
 201         panic("Trying to determine size of invalid atomic type");
 202 }
 203
 204 static unsigned get_compound_type_size(compound_type_t *type)
 205 {
 206         ir_type *irtype = get_ir_type(&type->type);
 207         return get_type_size_bytes(irtype);
 208 }
 209
 210 static unsigned get_array_type_size(array_type_t *type)
 211 {
 212         ir_type *irtype = get_ir_type(&type->type);
 213         return get_type_size_bytes(irtype);
 214 }
 215
 216 static unsigned get_type_size(type_t *type)
 217 {
 218         type = skip_typeref(type);
 219
 220         switch(type->type) {
 221         case TYPE_ATOMIC:
 222                 return get_atomic_type_size((const atomic_type_t*) type);
 223         case TYPE_ENUM:
 224                 return get_mode_size_bytes(mode_Is);
 225         case TYPE_COMPOUND_UNION:
 226         case TYPE_COMPOUND_STRUCT:
 227                 return get_compound_type_size((compound_type_t*) type);
 228         case TYPE_FUNCTION:
 229                 /* just a pointer to the function */
 230                 return get_mode_size_bytes(mode_P_code);
 231         case TYPE_POINTER:
 232                 return get_mode_size_bytes(mode_P_data);
 233         case TYPE_ARRAY:
 234                 return get_array_type_size((array_type_t*) type);
 235         case TYPE_BUILTIN:
 236         case TYPE_TYPEDEF:
 237         case TYPE_TYPEOF:
 238         case TYPE_INVALID:
 239                 break;
 240         }
 241         panic("Trying to determine size of invalid type");
 242 }
 243
 244 static unsigned count_parameters(const function_type_t *function_type)
 245 {
 246         unsigned count = 0;
 247
 248         function_parameter_t *parameter = function_type->parameters;
 249         for ( ; parameter != NULL; parameter = parameter->next) {
 250                 ++count;
 251         }
 252
 253         return count;
 254 }
 255
 256
 257
 258
 259 static long fold_constant(const expression_t *expression);
 260
 261 static ir_type *create_atomic_type(const atomic_type_t *type)
 262 {
 263         ir_mode *mode   = get_atomic_mode(type);
 264         ident   *id     = get_mode_ident(mode);
 265         ir_type *irtype = new_type_primitive(id, mode);
 266
 267         return irtype;
 268 }
 269
 270 static ir_type *create_method_type(const function_type_t *function_type)
 271 {
 272         type_t  *result_type  = function_type->result_type;
 273
 274         ident   *id           = unique_ident("functiontype");
 275         int      n_parameters = count_parameters(function_type);
 276         int      n_results    = result_type == type_void ? 0 : 1;
 277         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 278
 279         if(result_type != type_void) {
 280                 ir_type *restype = get_ir_type(result_type);
 281                 set_method_res_type(irtype, 0, restype);
 282         }
 283
 284         function_parameter_t *parameter = function_type->parameters;
 285         int                   n         = 0;
 286         for( ; parameter != NULL; parameter = parameter->next) {
 287                 ir_type *p_irtype = get_ir_type(parameter->type);
 288                 set_method_param_type(irtype, n, p_irtype);
 289                 ++n;
 290         }
 291
 292         if(function_type->variadic || function_type->unspecified_parameters) {
 293                 set_method_variadicity(irtype, variadicity_variadic);
 294         }
 295
 296         return irtype;
 297 }
 298
 299 static ir_type *create_pointer_type(pointer_type_t *type)
 300 {
 301         type_t  *points_to = type->points_to;
 302         ir_type *ir_points_to;
 303         /* Avoid endless recursion if the points_to type contains this poiner type
 304          * again (might be a struct). We therefore first create a void* pointer
 305          * and then set the real points_to type
 306          */
 307         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 308                                             ir_type_void, mode_P_data);
 309         type->type.firm_type  = ir_type;
 310
 311         ir_points_to = get_ir_type(points_to);
 312         set_pointer_points_to_type(ir_type, ir_points_to);
 313
 314         return ir_type;
 315 }
 316
 317 static ir_type *create_array_type(array_type_t *type)
 318 {
 319         type_t  *element_type    = type->element_type;
 320         ir_type *ir_element_type = get_ir_type(element_type);
 321
 322         ident   *id      = unique_ident("array");
 323         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 324
 325         if(type->size != NULL) {
 326                 int n_elements = fold_constant(type->size);
 327
 328                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 329
 330                 size_t elemsize = get_type_size_bytes(ir_element_type);
 331                 int align = get_type_alignment_bytes(ir_element_type);
 332                 if(elemsize % align > 0) {
 333                         elemsize += align - (elemsize % align);
 334                 }
 335                 set_type_size_bytes(ir_type, n_elements * elemsize);
 336                 set_type_alignment_bytes(ir_type, align);
 337                 set_type_state(ir_type, layout_fixed);
 338         }
 339
 340         return ir_type;
 341 }
 342
 343 #define INVALID_TYPE ((ir_type_ptr)-1)
 344
 345 static ir_type *create_struct_type(compound_type_t *type)
 346 {
 347         symbol_t *symbol = type->declaration->symbol;
 348         ident    *id;
 349         if(symbol != NULL) {
 350                 id = unique_ident(symbol->string);
 351         } else {
 352                 id = unique_ident("__anonymous_struct");
 353         }
 354         ir_type *ir_type = new_type_struct(id);
 355
 356         type->type.firm_type = ir_type;
 357
 358         int align_all = 1;
 359         int offset    = 0;
 360         declaration_t *entry = type->declaration->context.declarations;
 361         for( ; entry != NULL; entry = entry->next) {
 362                 if(entry->namespace != NAMESPACE_NORMAL)
 363                         continue;
 364
 365                 ident       *ident         = new_id_from_str(entry->symbol->string);
 366                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 367
 368                 int entry_size      = get_type_size_bytes(entry_ir_type);
 369                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 370                 int misalign = offset % entry_alignment;
 371                 offset += misalign;
 372
 373                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 374                 set_entity_offset(entity, offset);
 375                 add_struct_member(ir_type, entity);
 376                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 377                 entry->v.entity         = entity;
 378
 379                 offset += entry_size;
 380                 if(entry_alignment > align_all) {
 381                         if(entry_alignment % align_all != 0) {
 382                                 panic("Uneven alignments not supported yet");
 383                         }
 384                         align_all = entry_alignment;
 385                 }
 386         }
 387
 388         int misalign = offset % align_all;
 389         offset += misalign;
 390         set_type_alignment_bytes(ir_type, align_all);
 391         set_type_size_bytes(ir_type, offset);
 392         set_type_state(ir_type, layout_fixed);
 393
 394         return ir_type;
 395 }
 396
 397 static ir_type *create_union_type(compound_type_t *type)
 398 {
 399         declaration_t *declaration = type->declaration;
 400         symbol_t      *symbol      = declaration->symbol;
 401         ident         *id;
 402         if(symbol != NULL) {
 403                 id = unique_ident(symbol->string);
 404         } else {
 405                 id = unique_ident("__anonymous_union");
 406         }
 407         ir_type  *ir_type = new_type_union(id);
 408
 409         type->type.firm_type = ir_type;
 410
 411         int align_all = 1;
 412         int size      = 0;
 413         declaration_t *entry = declaration->context.declarations;
 414         for( ; entry != NULL; entry = entry->next) {
 415                 if(entry->namespace != NAMESPACE_NORMAL)
 416                         continue;
 417
 418                 ident       *ident         = new_id_from_str(entry->symbol->string);
 419                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 420
 421                 int entry_size      = get_type_size_bytes(entry_ir_type);
 422                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 423
 424                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 425                 add_union_member(ir_type, entity);
 426                 set_entity_offset(entity, 0);
 427                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 428                 entry->v.entity         = entity;
 429
 430                 if(entry_size > size) {
 431                         size = entry_size;
 432                 }
 433                 if(entry_alignment > align_all) {
 434                         if(entry_alignment % align_all != 0) {
 435                                 panic("Uneven alignments not supported yet");
 436                         }
 437                         align_all = entry_alignment;
 438                 }
 439         }
 440
 441         set_type_alignment_bytes(ir_type, align_all);
 442         set_type_size_bytes(ir_type, size);
 443         set_type_state(ir_type, layout_fixed);
 444
 445         return ir_type;
 446 }
 447
 448 static ir_type *get_ir_type(type_t *type)
 449 {
 450         assert(type != NULL);
 451
 452         type = skip_typeref(type);
 453
 454         if(type->firm_type != NULL) {
 455                 assert(type->firm_type != INVALID_TYPE);
 456                 return type->firm_type;
 457         }
 458
 459         ir_type *firm_type = NULL;
 460         switch(type->type) {
 461         case TYPE_ATOMIC:
 462                 firm_type = create_atomic_type((atomic_type_t*) type);
 463                 break;
 464         case TYPE_FUNCTION:
 465                 firm_type = create_method_type((function_type_t*) type);
 466                 break;
 467         case TYPE_POINTER:
 468                 firm_type = create_pointer_type((pointer_type_t*) type);
 469                 break;
 470         case TYPE_ARRAY:
 471                 firm_type = create_array_type((array_type_t*) type);
 472                 break;
 473         case TYPE_COMPOUND_STRUCT:
 474                 firm_type = create_struct_type((compound_type_t*) type);
 475                 break;
 476         case TYPE_COMPOUND_UNION:
 477                 firm_type = create_union_type((compound_type_t*) type);
 478                 break;
 479         case TYPE_ENUM:
 480                 firm_type = ir_type_int;
 481                 break;
 482         case TYPE_BUILTIN:
 483         case TYPE_TYPEOF:
 484         case TYPE_TYPEDEF:
 485         case TYPE_INVALID:
 486                 break;
 487         }
 488         if(firm_type == NULL)
 489                 panic("unknown type found");
 490
 491         type->firm_type = firm_type;
 492         return firm_type;
 493 }
 494
 495 static inline ir_mode *get_ir_mode(type_t *type)
 496 {
 497         ir_type *irtype = get_ir_type(type);
 498
 499         /* firm doesn't report a mode for arrays somehow... */
 500         if(is_Array_type(irtype)) {
 501                 return mode_P;
 502         }
 503
 504         ir_mode *mode   = get_type_mode(irtype);
 505         assert(mode != NULL);
 506         return mode;
 507 }
 508
 509 static ir_entity* get_function_entity(declaration_t *declaration)
 510 {
 511         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 512                 return declaration->v.entity;
 513         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 514
 515         symbol_t *symbol = declaration->symbol;
 516         ident    *id     = new_id_from_str(symbol->string);
 517
 518         ir_type  *global_type    = get_glob_type();
 519         ir_type  *ir_type_method = get_ir_type(declaration->type);
 520         assert(is_Method_type(ir_type_method));
 521
 522         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 523         set_entity_ld_ident(entity, id);
 524         if(declaration->storage_class == STORAGE_CLASS_STATIC
 525                         || declaration->is_inline) {
 526                 set_entity_visibility(entity, visibility_local);
 527         } else if(declaration->init.statement != NULL) {
 528                 set_entity_visibility(entity, visibility_external_visible);
 529         } else {
 530                 set_entity_visibility(entity, visibility_external_allocated);
 531         }
 532
 533         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 534         declaration->v.entity         = entity;
 535
 536         return entity;
 537 }
 538
 539
 540
 541 static ir_node *expression_to_firm(const expression_t *expression);
 542 static ir_node *expression_to_modeb(const expression_t *expression);
 543
 544 static dbg_info *get_dbg_info(const source_position_t *pos)
 545 {
 546         return (dbg_info*) pos;
 547 }
 548
 549 static ir_node *const_to_firm(const const_t *cnst)
 550 {
 551         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 552         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 553
 554         tarval   *tv;
 555         if(mode_is_float(mode)) {
 556                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 557         } else {
 558                 tv = new_tarval_from_long(cnst->v.int_value, mode);
 559         }
 560
 561         return new_d_Const(dbgi, mode, tv);
 562 }
 563
 564 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 565 {
 566         assert(entity != NULL);
 567         union symconst_symbol sym;
 568         sym.entity_p = entity;
 569         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 570 }
 571
 572 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 573 {
 574         ir_type   *global_type = get_glob_type();
 575         ir_type   *type        = new_type_array(unique_ident("strtype"), 1,
 576                                                 ir_type_const_char);
 577
 578         ident     *id     = unique_ident("Lstr");
 579         ir_entity *entity = new_entity(global_type, id, type);
 580         set_entity_ld_ident(entity, id);
 581         set_entity_variability(entity, variability_constant);
 582
 583         ir_type    *elem_type = ir_type_const_char;
 584         ir_mode    *mode      = get_type_mode(elem_type);
 585
 586         const char *string = literal->value;
 587         size_t      slen   = strlen(string) + 1;
 588
 589         set_array_lower_bound_int(type, 0, 0);
 590         set_array_upper_bound_int(type, 0, slen);
 591         set_type_size_bytes(type, slen);
 592         set_type_state(type, layout_fixed);
 593
 594         tarval **tvs = xmalloc(slen * sizeof(tvs[0]));
 595         for(size_t i = 0; i < slen; ++i) {
 596                 tvs[i] = new_tarval_from_long(string[i], mode);
 597         }
 598
 599         set_array_entity_values(entity, tvs, slen);
 600         free(tvs);
 601
 602         dbg_info *dbgi = get_dbg_info(&literal->expression.source_position);
 603
 604         return create_symconst(dbgi, entity);
 605 }
 606
 607 static ir_node *load_from_expression_addr(type_t *type, ir_node *addr,
 608                                           dbg_info *dbgi)
 609 {
 610         ir_mode *mode     = get_ir_mode(type);
 611         ir_node *memory   = get_store();
 612         ir_node *load     = new_d_Load(dbgi, memory, addr, mode);
 613         ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 614         ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
 615         set_store(load_mem);
 616
 617         return load_res;
 618 }
 619
 620 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 621 {
 622         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 623         declaration_t *declaration = ref->declaration;
 624         type_t        *type        = skip_typeref(declaration->type);
 625         ir_mode       *mode        = get_ir_mode(type);
 626
 627         switch((declaration_type_t) declaration->declaration_type) {
 628         case DECLARATION_TYPE_UNKNOWN:
 629                 break;
 630         case DECLARATION_TYPE_LOCAL_VARIABLE:
 631                 return get_value(declaration->v.value_number, mode);
 632         case DECLARATION_TYPE_FUNCTION: {
 633                 return create_symconst(dbgi, declaration->v.entity);
 634         }
 635         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 636                 ir_entity *entity   = declaration->v.entity;
 637                 ir_node   *symconst = create_symconst(dbgi, entity);
 638
 639                 if(type->type == TYPE_ARRAY) {
 640                         return symconst;
 641                 } else {
 642                         return load_from_expression_addr(type, symconst, dbgi);
 643                 }
 644         }
 645         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY:
 646         case DECLARATION_TYPE_COMPOUND_MEMBER:
 647         case DECLARATION_TYPE_LABEL_BLOCK:
 648                 panic("not implemented reference type");
 649         }
 650
 651         panic("reference to declaration with unknown type found");
 652 }
 653
 654 static ir_node *reference_addr(const reference_expression_t *ref)
 655 {
 656         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 657         declaration_t *declaration = ref->declaration;
 658
 659         switch((declaration_type_t) declaration->declaration_type) {
 660         case DECLARATION_TYPE_UNKNOWN:
 661                 break;
 662         case DECLARATION_TYPE_LOCAL_VARIABLE:
 663                 panic("local variable without entity has no address");
 664         case DECLARATION_TYPE_FUNCTION: {
 665                 return create_symconst(dbgi, declaration->v.entity);
 666         }
 667         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 668                 ir_entity *entity   = declaration->v.entity;
 669                 ir_node   *symconst = create_symconst(dbgi, entity);
 670                 return symconst;
 671         }
 672         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY:
 673         case DECLARATION_TYPE_COMPOUND_MEMBER:
 674         case DECLARATION_TYPE_LABEL_BLOCK:
 675                 panic("not implemented reference type");
 676         }
 677
 678         panic("reference to declaration with unknown type found");
 679 }
 680
 681 static ir_node *call_expression_to_firm(const call_expression_t *call)
 682 {
 683         assert(get_cur_block() != NULL);
 684
 685         expression_t  *function = call->function;
 686         ir_node       *callee   = expression_to_firm(function);
 687
 688         assert(function->datatype->type == TYPE_FUNCTION);
 689         function_type_t *function_type = (function_type_t*) function->datatype;
 690
 691         int              n_parameters = 0;
 692         call_argument_t *argument     = call->arguments;
 693         for( ; argument != NULL; argument = argument->next) {
 694                 ++n_parameters;
 695         }
 696
 697         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 698         ir_type *new_method_type = NULL;
 699         if(function_type->variadic || function_type->unspecified_parameters) {
 700                 /* we need to construct a new method type matching the call
 701                  * arguments... */
 702                 int n_res       = get_method_n_ress(ir_method_type);
 703                 new_method_type = new_type_method(unique_ident("calltype"),
 704                                                   n_parameters, n_res);
 705                 set_method_calling_convention(new_method_type,
 706                                get_method_calling_convention(ir_method_type));
 707                 set_method_additional_properties(new_method_type,
 708                                get_method_additional_properties(ir_method_type));
 709
 710                 for(int i = 0; i < n_res; ++i) {
 711                         set_method_res_type(new_method_type, i,
 712                                             get_method_res_type(ir_method_type, i));
 713                 }
 714         }
 715         ir_node *in[n_parameters];
 716
 717         argument = call->arguments;
 718         int n = 0;
 719         for( ; argument != NULL; argument = argument->next) {
 720                 expression_t *expression = argument->expression;
 721                 ir_node      *arg_node   = expression_to_firm(expression);
 722
 723                 in[n] = arg_node;
 724                 if(new_method_type != NULL) {
 725                         ir_type *irtype = get_ir_type(expression->datatype);
 726                         set_method_param_type(new_method_type, n, irtype);
 727                 }
 728
 729                 n++;
 730         }
 731         assert(n == n_parameters);
 732
 733         if(new_method_type != NULL)
 734                 ir_method_type = new_method_type;
 735
 736         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 737         ir_node  *store = get_store();
 738         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 739                                      ir_method_type);
 740         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 741         set_store(mem);
 742
 743         type_t  *result_type = function_type->result_type;
 744         ir_node *result      = NULL;
 745         if(result_type != type_void) {
 746                 ir_mode *mode    = get_ir_mode(result_type);
 747                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 748                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 749         }
 750
 751         return result;
 752 }
 753
 754 static ir_node *expression_to_addr(const expression_t *expression);
 755
 756 static void set_value_for_expression(const expression_t *expression,
 757                                      ir_node *value)
 758 {
 759         if(expression->type == EXPR_REFERENCE) {
 760                 reference_expression_t *ref = (reference_expression_t*) expression;
 761
 762                 declaration_t *declaration = ref->declaration;
 763                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 764                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 765                         set_value(declaration->v.value_number, value);
 766                         return;
 767                 }
 768         }
 769
 770         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 771         ir_node  *addr      = expression_to_addr(expression);
 772         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 773         ir_node  *memory    = get_store();
 774         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 775         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 776         set_store(store_mem);
 777 }
 778
 779 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 780 {
 781         ir_mode *value_mode = get_irn_mode(value);
 782
 783         if(value_mode == dest_mode)
 784                 return value;
 785
 786         if(dest_mode == mode_b) {
 787                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 788                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 789                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 790                 return proj;
 791         }
 792
 793         return new_d_Conv(dbgi, value, dest_mode);
 794 }
 795
 796 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 797 {
 798         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 799         type_t   *type = expression->expression.datatype;
 800         ir_mode  *mode = get_ir_mode(type);
 801
 802         if(expression->type == UNEXPR_TAKE_ADDRESS)
 803                 return expression_to_addr(expression->value);
 804
 805         const expression_t *value      = expression->value;
 806         ir_node            *value_node = expression_to_firm(value);
 807
 808         switch(expression->type) {
 809         case UNEXPR_NEGATE:
 810                 return new_d_Minus(dbgi, value_node, mode);
 811         case UNEXPR_PLUS:
 812                 return value_node;
 813         case UNEXPR_BITWISE_NEGATE:
 814                 return new_d_Not(dbgi, value_node, mode);
 815         case UNEXPR_NOT:
 816                 if(get_irn_mode(value_node) != mode_b) {
 817                         value_node = create_conv(dbgi, value_node, mode_b);
 818                 }
 819                 value_node = new_d_Not(dbgi, value_node, mode_b);
 820                 if(mode != mode_b) {
 821                         value_node = create_conv(dbgi, value_node, mode);
 822                 }
 823                 return value_node;
 824         case UNEXPR_DEREFERENCE:
 825                 return load_from_expression_addr(type, value_node, dbgi);
 826         case UNEXPR_POSTFIX_INCREMENT: {
 827                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 828                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 829                 set_value_for_expression(value, new_value);
 830                 return value_node;
 831         }
 832         case UNEXPR_POSTFIX_DECREMENT: {
 833                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 834                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 835                 set_value_for_expression(value, new_value);
 836                 return value_node;
 837         }
 838         case UNEXPR_PREFIX_INCREMENT: {
 839                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 840                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 841                 set_value_for_expression(value, new_value);
 842                 return new_value;
 843         }
 844         case UNEXPR_PREFIX_DECREMENT: {
 845                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 846                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 847                 set_value_for_expression(value, new_value);
 848                 return new_value;
 849         }
 850         case UNEXPR_CAST:
 851                 return create_conv(dbgi, value_node, mode);
 852
 853         case UNEXPR_TAKE_ADDRESS:
 854         case UNEXPR_INVALID:
 855                 break;
 856         }
 857         panic("invalid UNEXPR type found");
 858 }
 859
 860 static long get_pnc(binary_expression_type_t type)
 861 {
 862         switch(type) {
 863         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 864         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 865         case BINEXPR_LESS:         return pn_Cmp_Lt;
 866         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 867         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 868         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 869         default:
 870                 break;
 871         }
 872         panic("trying to get pn_Cmp from non-comparison binexpr type");
 873 }
 874
 875 static ir_node *create_lazy_op(const binary_expression_t *expression)
 876 {
 877         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 878
 879         bool is_or = (expression->type == BINEXPR_LOGICAL_OR);
 880         assert(is_or || expression->type == BINEXPR_LOGICAL_AND);
 881
 882         ir_node  *val1       = expression_to_modeb(expression->left);
 883         ir_node  *cond       = new_d_Cond(dbgi, val1);
 884         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
 885         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
 886
 887         ir_node *fallthrough_block = new_immBlock();
 888
 889         /* the true case */
 890         ir_node *calc_val2_block = new_immBlock();
 891         if(is_or) {
 892                 add_immBlock_pred(calc_val2_block, false_proj);
 893         } else {
 894                 add_immBlock_pred(calc_val2_block, true_proj);
 895         }
 896
 897         mature_immBlock(calc_val2_block);
 898
 899         ir_node *val2 = expression_to_modeb(expression->right);
 900         if(get_cur_block() != NULL) {
 901                 ir_node *jmp = new_d_Jmp(dbgi);
 902                 add_immBlock_pred(fallthrough_block, jmp);
 903         }
 904
 905         /* fallthrough */
 906         ir_node *constb;
 907         if(is_or) {
 908                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_true());
 909                 add_immBlock_pred(fallthrough_block, true_proj);
 910         } else {
 911                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_false());
 912                 add_immBlock_pred(fallthrough_block, false_proj);
 913         }
 914         mature_immBlock(fallthrough_block);
 915
 916         set_cur_block(fallthrough_block);
 917
 918         ir_node *in[2] = { val2, constb };
 919         ir_node *val   = new_d_Phi(dbgi, 2, in, mode_b);
 920
 921         return val;
 922 }
 923
 924 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
 925                                             ir_node *right, ir_mode *mode);
 926
 927 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
 928                                         create_arithmetic_func func)
 929 {
 930         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 931         ir_node  *left  = expression_to_firm(expression->left);
 932         ir_node  *right = expression_to_firm(expression->right);
 933         type_t   *type  = expression->right->datatype;
 934         /* be careful with the modes, because in asithmetic assign nodes only
 935          * the right operand has the mode of the arithmetic alread */
 936         ir_mode  *mode  = get_ir_mode(type);
 937         left            = create_conv(dbgi, left, mode);
 938         ir_node  *res   = func(dbgi, left, right, mode);
 939
 940         return res;
 941 }
 942
 943 static ir_node *create_arithmetic_assign_binop(
 944                 const binary_expression_t *expression, create_arithmetic_func func)
 945 {
 946         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 947         ir_node  *value = create_arithmetic_binop(expression, func);
 948         type_t   *type  = expression->expression.datatype;
 949         ir_mode  *mode  = get_ir_mode(type);
 950
 951         assert(type->type != TYPE_POINTER);
 952
 953         value = create_conv(dbgi, value, mode);
 954         set_value_for_expression(expression->left, value);
 955
 956         return value;
 957 }
 958
 959 static ir_node *create_add(const binary_expression_t *expression)
 960 {
 961         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 962         ir_node  *left  = expression_to_firm(expression->left);
 963         ir_node  *right = expression_to_firm(expression->right);
 964         type_t   *type  = expression->expression.datatype;
 965         ir_mode  *mode  = get_ir_mode(type);
 966
 967         expression_t *expr_left  = expression->left;
 968         expression_t *expr_right = expression->right;
 969         type_t       *type_left  = skip_typeref(expr_left->datatype);
 970         type_t       *type_right = skip_typeref(expr_right->datatype);
 971
 972         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
 973                 return new_d_Add(dbgi, left, right, mode);
 974         }
 975
 976         ir_node        *pointer;
 977         ir_node        *integer;
 978         pointer_type_t *pointer_type;
 979         if(type_left->type == TYPE_POINTER) {
 980                 pointer      = left;
 981                 integer      = right;
 982                 pointer_type = (pointer_type_t*) type_left;
 983         } else {
 984                 assert(type_right->type == TYPE_POINTER);
 985                 pointer      = right;
 986                 integer      = left;
 987                 pointer_type = (pointer_type_t*) type_right;
 988         }
 989
 990         type_t   *points_to = pointer_type->points_to;
 991         unsigned  elem_size = get_type_size(points_to);
 992
 993         assert(elem_size >= 1);
 994         if(elem_size > 1) {
 995                 integer       = create_conv(dbgi, integer, mode_Is);
 996                 ir_node *cnst = new_Const_long(mode_Is, (int) elem_size);
 997                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
 998                 integer = mul;
 999         }
1000
1001         ir_node *res = new_d_Add(dbgi, pointer, integer, mode);
1002
1003         return res;
1004 }
1005
1006 static ir_node *create_sub(const binary_expression_t *expression)
1007 {
1008         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1009         ir_node  *left  = expression_to_firm(expression->left);
1010         ir_node  *right = expression_to_firm(expression->right);
1011         type_t   *type  = expression->expression.datatype;
1012         ir_mode  *mode  = get_ir_mode(type);
1013
1014         expression_t *expr_left  = expression->left;
1015         expression_t *expr_right = expression->right;
1016         type_t       *type_left  = skip_typeref(expr_left->datatype);
1017         type_t       *type_right = skip_typeref(expr_right->datatype);
1018
1019         if((is_type_arithmetic(type_left) && is_type_arithmetic(type_right))
1020                         || (type_left->type == TYPE_POINTER
1021                                 && type_right->type == TYPE_POINTER)) {
1022                 return new_d_Sub(dbgi, left, right, mode);
1023         }
1024
1025         assert(type_right->type == TYPE_POINTER);
1026         ir_node        *pointer      = left;
1027         ir_node        *integer      = right;
1028         pointer_type_t *pointer_type = (pointer_type_t*) type_right;
1029
1030         type_t   *points_to = pointer_type->points_to;
1031         unsigned  elem_size = get_type_size(points_to);
1032
1033         assert(elem_size >= 1);
1034         if(elem_size > 1) {
1035                 ir_node *cnst = new_Const_long(mode_Iu, elem_size);
1036                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Iu);
1037                 integer = mul;
1038         }
1039
1040         ir_node *res = new_d_Sub(dbgi, pointer, integer, mode);
1041
1042         return res;
1043 }
1044
1045 static ir_node *create_divmod(const binary_expression_t *expression)
1046 {
1047         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1048         ir_node  *left  = expression_to_firm(expression->left);
1049         ir_node  *right = expression_to_firm(expression->right);
1050         ir_node  *pin   = new_Pin(new_NoMem());
1051         type_t   *type  = expression->expression.datatype;
1052         ir_mode  *mode  = get_ir_mode(type);
1053         ir_node  *op;
1054         ir_node  *res;
1055
1056         if(expression->type == BINEXPR_DIV) {
1057                 if(mode_is_float(mode)) {
1058                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1059                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1060                 } else {
1061                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1062                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1063                 }
1064         } else {
1065                 assert(expression->type == BINEXPR_MOD);
1066                 assert(!mode_is_float(mode));
1067                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1068                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1069         }
1070
1071         return res;
1072 }
1073
1074
1075
1076 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1077 {
1078         binary_expression_type_t type = expression->type;
1079         switch(type) {
1080         case BINEXPR_EQUAL:
1081         case BINEXPR_NOTEQUAL:
1082         case BINEXPR_LESS:
1083         case BINEXPR_LESSEQUAL:
1084         case BINEXPR_GREATER:
1085         case BINEXPR_GREATEREQUAL: {
1086                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1087                 ir_node *left  = expression_to_firm(expression->left);
1088                 ir_node *right = expression_to_firm(expression->right);
1089                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1090                 long     pnc   = get_pnc(type);
1091                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1092                 return proj;
1093         }
1094         case BINEXPR_ASSIGN: {
1095                 ir_node *right = expression_to_firm(expression->right);
1096                 set_value_for_expression(expression->left, right);
1097                 return right;
1098         }
1099         case BINEXPR_ADD:
1100                 return create_add(expression);
1101         case BINEXPR_SUB:
1102                 return create_sub(expression);
1103         case BINEXPR_MUL:
1104                 return create_arithmetic_binop(expression, new_d_Mul);
1105         case BINEXPR_BITWISE_AND:
1106                 return create_arithmetic_binop(expression, new_d_And);
1107         case BINEXPR_BITWISE_OR:
1108                 return create_arithmetic_binop(expression, new_d_Or);
1109         case BINEXPR_BITWISE_XOR:
1110                 return create_arithmetic_binop(expression, new_d_Eor);
1111         case BINEXPR_SHIFTLEFT:
1112                 return create_arithmetic_binop(expression, new_d_Shl);
1113         case BINEXPR_SHIFTRIGHT:
1114                 return create_arithmetic_binop(expression, new_d_Shr);
1115         case BINEXPR_DIV:
1116         case BINEXPR_MOD:
1117                 return create_divmod(expression);
1118         case BINEXPR_LOGICAL_AND:
1119         case BINEXPR_LOGICAL_OR:
1120                 return create_lazy_op(expression);
1121         case BINEXPR_COMMA:
1122                 expression_to_firm(expression->left);
1123                 return expression_to_firm(expression->right);
1124         case BINEXPR_ADD_ASSIGN:
1125                 return create_arithmetic_assign_binop(expression, new_d_Add);
1126         case BINEXPR_SUB_ASSIGN:
1127                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1128         case BINEXPR_MUL_ASSIGN:
1129                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1130         case BINEXPR_BITWISE_AND_ASSIGN:
1131                 return create_arithmetic_assign_binop(expression, new_d_And);
1132         case BINEXPR_BITWISE_OR_ASSIGN:
1133                 return create_arithmetic_assign_binop(expression, new_d_Or);
1134         case BINEXPR_BITWISE_XOR_ASSIGN:
1135                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1136         case BINEXPR_SHIFTLEFT_ASSIGN:
1137                 return create_arithmetic_assign_binop(expression, new_d_Shl);
1138         case BINEXPR_SHIFTRIGHT_ASSIGN:
1139                 return create_arithmetic_assign_binop(expression, new_d_Shr);
1140         default:
1141                 panic("TODO binexpr type");
1142         }
1143 }
1144
1145 static ir_node *array_access_addr(const array_access_expression_t *expression)
1146 {
1147         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1148
1149         ir_node *base_addr = expression_to_firm(expression->array_ref);
1150         ir_node *offset    = expression_to_firm(expression->index);
1151         offset             = create_conv(dbgi, offset, mode_Iu);
1152
1153         unsigned elem_size       = get_type_size(expression->expression.datatype);
1154         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1155         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1156                                              mode_Iu);
1157         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1158
1159         return result;
1160 }
1161
1162 static ir_node *array_access_to_firm(
1163                 const array_access_expression_t *expression)
1164 {
1165         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1166         ir_node  *addr = array_access_addr(expression);
1167         type_t   *type = expression->expression.datatype;
1168
1169         return load_from_expression_addr(type, addr, dbgi);
1170 }
1171
1172 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1173 {
1174         type_t *type = expression->type;
1175         if(type == NULL) {
1176                 type = expression->size_expression->datatype;
1177                 assert(type != NULL);
1178         }
1179
1180         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1181         unsigned  size      = get_type_size(type);
1182         ir_node  *size_node = new_Const_long(mode, size);
1183
1184         return size_node;
1185 }
1186
1187 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1188 {
1189         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1190
1191         ir_node *condition  = expression_to_modeb(expression->condition);
1192         ir_node *cond       = new_d_Cond(dbgi, condition);
1193         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1194         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1195
1196         /* create the true block */
1197         ir_node *true_block = new_immBlock();
1198         add_immBlock_pred(true_block, true_proj);
1199         mature_immBlock(true_block);
1200
1201         ir_node *true_val = expression_to_firm(expression->true_expression);
1202         ir_node *true_jmp = new_Jmp();
1203
1204         /* create the false block */
1205         ir_node *false_block = new_immBlock();
1206         add_immBlock_pred(false_block, false_proj);
1207         mature_immBlock(false_block);
1208
1209         ir_node *false_val = expression_to_firm(expression->false_expression);
1210         ir_node *false_jmp = new_Jmp();
1211
1212         /* create the common block */
1213         ir_node *common_block = new_immBlock();
1214         add_immBlock_pred(common_block, true_jmp);
1215         add_immBlock_pred(common_block, false_jmp);
1216         mature_immBlock(common_block);
1217
1218         ir_node *in[2] = { true_val, false_val };
1219         ir_mode *mode  = get_irn_mode(true_val);
1220         assert(get_irn_mode(false_val) == mode);
1221         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1222
1223         return val;
1224 }
1225
1226 static ir_node *expression_to_addr(const expression_t *expression)
1227 {
1228         switch(expression->type) {
1229         case EXPR_REFERENCE:
1230                 return reference_addr((const reference_expression_t*) expression);
1231         case EXPR_ARRAY_ACCESS:
1232                 return array_access_addr((const array_access_expression_t*) expression);
1233         default:
1234                 break;
1235         }
1236         panic("trying to get address of non-lvalue");
1237 }
1238
1239 static ir_node *_expression_to_firm(const expression_t *expression)
1240 {
1241         switch(expression->type) {
1242         case EXPR_CONST:
1243                 return const_to_firm((const const_t*) expression);
1244         case EXPR_STRING_LITERAL:
1245                 return string_literal_to_firm((const string_literal_t*) expression);
1246         case EXPR_REFERENCE:
1247                 return reference_expression_to_firm(
1248                                 (const reference_expression_t*) expression);
1249         case EXPR_CALL:
1250                 return call_expression_to_firm((const call_expression_t*) expression);
1251         case EXPR_UNARY:
1252                 return unary_expression_to_firm((const unary_expression_t*) expression);
1253         case EXPR_BINARY:
1254                 return binary_expression_to_firm(
1255                                 (const binary_expression_t*) expression);
1256         case EXPR_ARRAY_ACCESS:
1257                 return array_access_to_firm(
1258                                 (const array_access_expression_t*) expression);
1259         case EXPR_SIZEOF:
1260                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1261         case EXPR_CONDITIONAL:
1262                 return conditional_to_firm((const conditional_expression_t*)expression);
1263         default:
1264                 break;
1265         }
1266         panic("unsupported expression found");
1267 }
1268
1269 static ir_node *expression_to_firm(const expression_t *expression)
1270 {
1271         ir_node *res  = _expression_to_firm(expression);
1272
1273         if(expression->datatype == type_void)
1274                 return NULL;
1275
1276         ir_mode *mode = get_ir_mode(expression->datatype);
1277         res           = create_conv(NULL, res, mode);
1278         return res;
1279 }
1280
1281 static ir_node *expression_to_modeb(const expression_t *expression)
1282 {
1283         ir_node *res = _expression_to_firm(expression);
1284         res          = create_conv(NULL, res, mode_b);
1285
1286         return res;
1287 }
1288
1289 static void statement_to_firm(statement_t *statement);
1290
1291 static void return_statement_to_firm(return_statement_t *statement)
1292 {
1293         if(get_cur_block() == NULL)
1294                 return;
1295
1296         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1297         ir_node  *ret;
1298
1299         if(statement->return_value != NULL) {
1300                 ir_node *retval = expression_to_firm(statement->return_value);
1301                 ir_node *in[1];
1302
1303                 in[0] = retval;
1304                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1305         } else {
1306                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1307         }
1308         ir_node *end_block = get_irg_end_block(current_ir_graph);
1309         add_immBlock_pred(end_block, ret);
1310
1311         set_cur_block(NULL);
1312 }
1313
1314 static void compound_statement_to_firm(compound_statement_t *compound)
1315 {
1316         statement_t *statement = compound->statements;
1317         for( ; statement != NULL; statement = statement->next) {
1318                 //context2firm(&statement->context);
1319                 statement_to_firm(statement);
1320         }
1321 }
1322
1323 static void expression_statement_to_firm(expression_statement_t *statement)
1324 {
1325         if(get_cur_block() == NULL)
1326                 return;
1327
1328         expression_to_firm(statement->expression);
1329 }
1330
1331 static void if_statement_to_firm(if_statement_t *statement)
1332 {
1333         dbg_info *dbgi      = get_dbg_info(&statement->statement.source_position);
1334         ir_node  *condition = expression_to_modeb(statement->condition);
1335
1336         /* make sure we have a mode_b condition */
1337         ir_node *cond       = new_d_Cond(dbgi, condition);
1338         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1339         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1340
1341         ir_node *fallthrough_block = new_immBlock();
1342
1343         /* the true (blocks) */
1344         ir_node *true_block = new_immBlock();
1345         add_immBlock_pred(true_block, true_proj);
1346         mature_immBlock(true_block);
1347
1348         statement_to_firm(statement->true_statement);
1349         if(get_cur_block() != NULL) {
1350                 ir_node *jmp = new_Jmp();
1351                 add_immBlock_pred(fallthrough_block, jmp);
1352         }
1353
1354         /* the false (blocks) */
1355         if(statement->false_statement != NULL) {
1356                 ir_node *false_block = new_immBlock();
1357                 add_immBlock_pred(false_block, false_proj);
1358                 mature_immBlock(false_block);
1359
1360                 statement_to_firm(statement->false_statement);
1361                 if(get_cur_block() != NULL) {
1362                         ir_node *jmp = new_Jmp();
1363                         add_immBlock_pred(fallthrough_block, jmp);
1364                 }
1365         } else {
1366                 add_immBlock_pred(fallthrough_block, false_proj);
1367         }
1368         mature_immBlock(fallthrough_block);
1369
1370         set_cur_block(fallthrough_block);
1371 }
1372
1373 static void while_statement_to_firm(while_statement_t *statement)
1374 {
1375         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1376
1377         ir_node *jmp = NULL;
1378         if(get_cur_block() != NULL) {
1379                 jmp = new_Jmp();
1380         }
1381
1382         /* create the header block */
1383         ir_node *header_block = new_immBlock();
1384         if(jmp != NULL) {
1385                 add_immBlock_pred(header_block, jmp);
1386         }
1387
1388         /* create the condition */
1389         ir_node *condition  = expression_to_modeb(statement->condition);
1390         ir_node *cond       = new_d_Cond(dbgi, condition);
1391         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1392         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1393
1394         /* the false block */
1395         ir_node *false_block = new_immBlock();
1396         add_immBlock_pred(false_block, false_proj);
1397
1398         /* the loop body */
1399         ir_node *body_block = new_immBlock();
1400         add_immBlock_pred(body_block, true_proj);
1401         mature_immBlock(body_block);
1402
1403         ir_node *old_continue_label = continue_label;
1404         ir_node *old_break_label    = break_label;
1405         continue_label              = header_block;
1406         break_label                 = false_block;
1407
1408         statement_to_firm(statement->body);
1409
1410         assert(continue_label == header_block);
1411         assert(break_label    == false_block);
1412         continue_label = old_continue_label;
1413         break_label    = old_break_label;
1414
1415         if(get_cur_block() != NULL) {
1416                 ir_node *jmp = new_Jmp();
1417                 add_immBlock_pred(header_block, jmp);
1418         }
1419
1420         mature_immBlock(header_block);
1421         mature_immBlock(false_block);
1422
1423         set_cur_block(false_block);
1424 }
1425
1426 static void do_while_statement_to_firm(do_while_statement_t *statement)
1427 {
1428         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1429
1430         ir_node *jmp = NULL;
1431         if(get_cur_block() != NULL) {
1432                 jmp = new_Jmp();
1433         }
1434
1435         /* create the header block */
1436         ir_node *header_block = new_immBlock();
1437
1438         /* the false block */
1439         ir_node *false_block = new_immBlock();
1440
1441         /* the loop body */
1442         ir_node *body_block = new_immBlock();
1443         if(jmp != NULL) {
1444                 add_immBlock_pred(body_block, jmp);
1445         }
1446
1447         ir_node *old_continue_label = continue_label;
1448         ir_node *old_break_label    = break_label;
1449         continue_label              = header_block;
1450         break_label                 = false_block;
1451
1452         statement_to_firm(statement->body);
1453
1454         assert(continue_label == header_block);
1455         assert(break_label    == false_block);
1456         continue_label = old_continue_label;
1457         break_label    = old_break_label;
1458
1459         if(get_cur_block() == NULL) {
1460                 mature_immBlock(header_block);
1461                 mature_immBlock(body_block);
1462                 return;
1463         }
1464
1465         ir_node *body_jmp = new_Jmp();
1466         add_immBlock_pred(header_block, body_jmp);
1467         mature_immBlock(header_block);
1468
1469         /* create the condition */
1470         ir_node *condition  = expression_to_modeb(statement->condition);
1471         ir_node *cond       = new_d_Cond(dbgi, condition);
1472         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1473         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1474
1475         add_immBlock_pred(body_block, true_proj);
1476         mature_immBlock(body_block);
1477
1478         add_immBlock_pred(false_block, false_proj);
1479         mature_immBlock(false_block);
1480
1481         set_cur_block(false_block);
1482 }
1483
1484 static void for_statement_to_firm(for_statement_t *statement)
1485 {
1486         dbg_info *const dbgi = get_dbg_info(&statement->statement.source_position);
1487
1488         ir_node *jmp = NULL;
1489         if (get_cur_block() != NULL) {
1490                 if(statement->initialisation != NULL) {
1491                         expression_to_firm(statement->initialisation);
1492                 }
1493                 jmp = new_Jmp();
1494         }
1495
1496         /* create the step block */
1497         ir_node *const step_block = new_immBlock();
1498         if (statement->step != NULL) {
1499                 expression_to_firm(statement->step);
1500         }
1501         ir_node *const step_jmp   = new_Jmp();
1502
1503         /* create the header block */
1504         ir_node *const header_block = new_immBlock();
1505         if (jmp != NULL) {
1506                 add_immBlock_pred(header_block, jmp);
1507         }
1508         add_immBlock_pred(header_block, step_jmp);
1509
1510         /* create the condition */
1511         ir_node *true_proj;
1512         ir_node *false_proj;
1513         if (statement->condition != NULL) {
1514                 ir_node *const condition  = expression_to_modeb(statement->condition);
1515                 ir_node *const cond       = new_d_Cond(dbgi, condition);
1516                 true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1517                 false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1518         } else {
1519                 keep_alive(header_block);
1520                 true_proj  = new_Jmp();
1521                 false_proj = NULL;
1522         }
1523
1524         /* the false block */
1525         ir_node *const false_block = new_immBlock();
1526         if (false_proj != NULL) {
1527                 add_immBlock_pred(false_block, false_proj);
1528         }
1529
1530         /* the loop body */
1531         ir_node *const body_block = new_immBlock();
1532         add_immBlock_pred(body_block, true_proj);
1533         mature_immBlock(body_block);
1534
1535         ir_node *const old_continue_label = continue_label;
1536         ir_node *const old_break_label    = break_label;
1537         continue_label = step_block;
1538         break_label    = false_block;
1539
1540         statement_to_firm(statement->body);
1541
1542         assert(continue_label == step_block);
1543         assert(break_label    == false_block);
1544         continue_label = old_continue_label;
1545         break_label    = old_break_label;
1546
1547         if (get_cur_block() != NULL) {
1548                 ir_node *const jmp = new_Jmp();
1549                 add_immBlock_pred(step_block, jmp);
1550         }
1551
1552         mature_immBlock(step_block);
1553         mature_immBlock(header_block);
1554         mature_immBlock(false_block);
1555
1556         set_cur_block(false_block);
1557 }
1558
1559 static void create_declaration_entity(declaration_t *declaration,
1560                                       declaration_type_t declaration_type,
1561                                       ir_type *parent_type)
1562 {
1563         ident     *id     = new_id_from_str(declaration->symbol->string);
1564         ir_type   *irtype = get_ir_type(declaration->type);
1565         ir_entity *entity = new_entity(parent_type, id, irtype);
1566         set_entity_ld_ident(entity, id);
1567
1568         declaration->declaration_type = declaration_type;
1569         declaration->v.entity         = entity;
1570         set_entity_variability(entity, variability_uninitialized);
1571         /* TODO: visibility? */
1572 }
1573
1574 static void create_initializer(declaration_t *declaration)
1575 {
1576         initializer_t *initializer = declaration->init.initializer;
1577         if(initializer == NULL)
1578                 return;
1579
1580         if(initializer->type == INITIALIZER_VALUE) {
1581                 assert(initializer->designator == NULL);
1582                 assert(initializer->next == NULL);
1583                 ir_node *init_node = expression_to_firm(initializer->v.value);
1584
1585                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1586                         set_value(declaration->v.value_number, init_node);
1587                 } else {
1588                         ir_entity *entity = declaration->v.entity;
1589
1590                         set_entity_variability(entity, variability_initialized);
1591                         set_atomic_ent_value(entity, init_node);
1592                 }
1593         } else {
1594                 assert(initializer->type == INITIALIZER_LIST);
1595                 panic("list initializer not supported yet");
1596         }
1597 }
1598
1599 static void create_local_variable(declaration_t *declaration)
1600 {
1601         bool needs_entity = declaration->address_taken;
1602
1603         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
1604
1605         if(needs_entity) {
1606                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
1607                 create_declaration_entity(declaration,
1608                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
1609                                           frame_type);
1610         } else {
1611                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1612                 declaration->v.value_number   = next_value_number_function;
1613                 ++next_value_number_function;
1614         }
1615
1616         create_initializer(declaration);
1617 }
1618
1619 static void declaration_statement_to_firm(declaration_statement_t *statement)
1620 {
1621         declaration_t *declaration = statement->declarations_begin;
1622         declaration_t *end         = statement->declarations_end->next;
1623         for( ; declaration != end; declaration = declaration->next) {
1624                 type_t *type = declaration->type;
1625
1626                 switch(declaration->storage_class) {
1627                 case STORAGE_CLASS_TYPEDEF:
1628                         continue;
1629                 case STORAGE_CLASS_STATIC:
1630                         panic("static local vars not implemented yet");
1631                 case STORAGE_CLASS_ENUM_ENTRY:
1632                         panic("enum entry declaration in local block found");
1633                 case STORAGE_CLASS_EXTERN:
1634                         panic("extern declaration in local block found");
1635                 case STORAGE_CLASS_NONE:
1636                 case STORAGE_CLASS_AUTO:
1637                 case STORAGE_CLASS_REGISTER:
1638                         if(type->type == TYPE_FUNCTION) {
1639                                 panic("nested functions not supported yet");
1640                         } else {
1641                                 create_local_variable(declaration);
1642                         }
1643                         continue;
1644                 }
1645                 panic("invalid storage class found");
1646         }
1647 }
1648
1649 static void create_jump_statement(const statement_t *statement,
1650                                   ir_node *target_block)
1651 {
1652         dbg_info *dbgi = get_dbg_info(&statement->source_position);
1653         ir_node  *jump = new_d_Jmp(dbgi);
1654         add_immBlock_pred(target_block, jump);
1655
1656         set_cur_block(NULL);
1657 }
1658
1659 static void switch_statement_to_firm(const switch_statement_t *statement)
1660 {
1661         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1662
1663         ir_node *expression  = expression_to_firm(statement->expression);
1664         ir_node *cond        = new_d_Cond(dbgi, expression);
1665         ir_node *break_block = new_immBlock();
1666
1667         set_cur_block(NULL);
1668
1669         ir_node *old_switch_cond = current_switch_cond;
1670         ir_node *old_break_label = break_label;
1671         current_switch_cond      = cond;
1672         break_label              = break_block;
1673
1674         statement_to_firm(statement->body);
1675
1676         if(get_cur_block() != NULL) {
1677                 ir_node *jmp = new_Jmp();
1678                 add_immBlock_pred(break_block, jmp);
1679         }
1680
1681         assert(current_switch_cond == cond);
1682         assert(break_label         == break_block);
1683         current_switch_cond = old_switch_cond;
1684         break_label         = old_break_label;
1685
1686         mature_immBlock(break_block);
1687         set_cur_block(break_block);
1688 }
1689
1690 static long fold_constant(const expression_t *expression)
1691 {
1692         ir_graph *old_current_ir_graph = current_ir_graph;
1693         current_ir_graph = get_const_code_irg();
1694
1695         ir_node *cnst = expression_to_firm(expression);
1696         if(!is_Const(cnst)) {
1697                 panic("couldn't fold constantl");
1698         }
1699         tarval *tv = get_Const_tarval(cnst);
1700         if(!tarval_is_long(tv)) {
1701                 panic("folded constant not an integer");
1702         }
1703
1704         long res = get_tarval_long(tv);
1705
1706         current_ir_graph = old_current_ir_graph;
1707         return res;
1708 }
1709
1710 static void case_label_to_firm(const case_label_statement_t *statement)
1711 {
1712         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1713
1714         /* let's create a node and hope firm constant folding creates a Const
1715          * node... */
1716         ir_node *proj;
1717         set_cur_block(get_nodes_block(current_switch_cond));
1718         if(statement->expression) {
1719                 long pn = fold_constant(statement->expression);
1720                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
1721                         /* oops someone detected our cheating... */
1722                         panic("magic default pn used");
1723                 }
1724                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
1725         } else {
1726                 proj = new_d_defaultProj(dbgi, current_switch_cond,
1727                                          MAGIC_DEFAULT_PN_NUMBER);
1728         }
1729
1730         ir_node *block = new_immBlock();
1731         add_immBlock_pred(block, proj);
1732         mature_immBlock(block);
1733 }
1734
1735 static ir_node *get_label_block(declaration_t *label)
1736 {
1737         assert(label->namespace == NAMESPACE_LABEL);
1738
1739         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
1740                 return label->v.block;
1741         }
1742         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
1743
1744         ir_node *old_cur_block = get_cur_block();
1745         ir_node *block         = new_immBlock();
1746         set_cur_block(old_cur_block);
1747
1748         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
1749         label->v.block          = block;
1750
1751         ARR_APP1(imature_blocks, block);
1752
1753         return block;
1754 }
1755
1756 static void label_to_firm(const label_statement_t *statement)
1757 {
1758         ir_node *block = get_label_block(statement->label);
1759
1760         if(get_cur_block() != NULL) {
1761                 ir_node *jmp = new_Jmp();
1762                 add_immBlock_pred(block, jmp);
1763         }
1764
1765         set_cur_block(block);
1766         keep_alive(block);
1767
1768         statement_to_firm(statement->label_statement);
1769 }
1770
1771 static void goto_to_firm(const goto_statement_t *statement)
1772 {
1773         if(get_cur_block() == NULL)
1774                 return;
1775
1776         ir_node *block = get_label_block(statement->label);
1777         ir_node *jmp   = new_Jmp();
1778         add_immBlock_pred(block, jmp);
1779
1780         set_cur_block(NULL);
1781 }
1782
1783 static void statement_to_firm(statement_t *statement)
1784 {
1785         switch(statement->type) {
1786         case STATEMENT_COMPOUND:
1787                 compound_statement_to_firm((compound_statement_t*) statement);
1788                 return;
1789         case STATEMENT_RETURN:
1790                 return_statement_to_firm((return_statement_t*) statement);
1791                 return;
1792         case STATEMENT_EXPRESSION:
1793                 expression_statement_to_firm((expression_statement_t*) statement);
1794                 return;
1795         case STATEMENT_IF:
1796                 if_statement_to_firm((if_statement_t*) statement);
1797                 return;
1798         case STATEMENT_WHILE:
1799                 while_statement_to_firm((while_statement_t*) statement);
1800                 return;
1801         case STATEMENT_DO_WHILE:
1802                 do_while_statement_to_firm((do_while_statement_t*) statement);
1803                 return;
1804         case STATEMENT_DECLARATION:
1805                 declaration_statement_to_firm((declaration_statement_t*) statement);
1806                 return;
1807         case STATEMENT_BREAK:
1808                 create_jump_statement(statement, break_label);
1809                 return;
1810         case STATEMENT_CONTINUE:
1811                 create_jump_statement(statement, continue_label);
1812                 return;
1813         case STATEMENT_SWITCH:
1814                 switch_statement_to_firm((switch_statement_t*) statement);
1815                 return;
1816         case STATEMENT_CASE_LABEL:
1817                 case_label_to_firm((case_label_statement_t*) statement);
1818                 return;
1819         case STATEMENT_FOR:
1820                 for_statement_to_firm((for_statement_t*) statement);
1821                 return;
1822         case STATEMENT_LABEL:
1823                 label_to_firm((label_statement_t*) statement);
1824                 return;
1825         case STATEMENT_GOTO:
1826                 goto_to_firm((goto_statement_t*) statement);
1827                 return;
1828         default:
1829                 break;
1830         }
1831         panic("Statement not implemented\n");
1832 }
1833
1834 static int get_function_n_local_vars(declaration_t *declaration)
1835 {
1836         (void) declaration;
1837         /* TODO */
1838         return 30;
1839 }
1840
1841 static void initialize_function_parameters(declaration_t *declaration)
1842 {
1843         ir_graph *irg         = current_ir_graph;
1844         ir_node  *args        = get_irg_args(irg);
1845         ir_node  *start_block = get_irg_start_block(irg);
1846
1847         int            n         = 0;
1848         declaration_t *parameter = declaration->context.declarations;
1849         for( ; parameter != NULL; parameter = parameter->next) {
1850                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
1851
1852                 if(parameter->address_taken) {
1853                         panic("address take from parameter not implemented yet");
1854                 }
1855
1856                 ir_mode *mode = get_ir_mode(parameter->type);
1857                 long     pn   = n;
1858                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
1859                 ++n;
1860
1861                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1862                 parameter->v.value_number   = next_value_number_function;
1863                 ++next_value_number_function;
1864
1865                 set_value(parameter->v.value_number, proj);
1866         }
1867 }
1868
1869 static void create_function(declaration_t *declaration)
1870 {
1871         ir_entity *entity = get_function_entity(declaration);
1872
1873         if(declaration->init.statement == NULL)
1874                 return;
1875
1876         assert(imature_blocks == NULL);
1877         imature_blocks = NEW_ARR_F(ir_node*, 0);
1878
1879         int       n_local_vars = get_function_n_local_vars(declaration);
1880         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
1881         ir_node  *first_block  = get_cur_block();
1882
1883         next_value_number_function = 0;
1884         initialize_function_parameters(declaration);
1885
1886         statement_to_firm(declaration->init.statement);
1887
1888         ir_node *end_block = get_irg_end_block(irg);
1889
1890         /* do we have a return statement yet? */
1891         if(get_cur_block() != NULL) {
1892                 assert(declaration->type->type == TYPE_FUNCTION);
1893                 const function_type_t* const func_type
1894                         = (const function_type_t*) declaration->type;
1895                 ir_node *ret;
1896                 if (func_type->result_type == type_void) {
1897                         ret = new_Return(get_store(), 0, NULL);
1898                 } else {
1899                         ir_mode *const mode = get_ir_mode(func_type->result_type);
1900                         ir_node *      in[1];
1901                         // §5.1.2.2.3 main implicitly returns 0
1902                         if (strcmp(declaration->symbol->string, "main") == 0) {
1903                                 in[0] = new_Const(mode, get_mode_null(mode));
1904                         } else {
1905                                 in[0] = new_Unknown(mode);
1906                         }
1907                         ret = new_Return(get_store(), 1, in);
1908                 }
1909                 add_immBlock_pred(end_block, ret);
1910         }
1911
1912         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
1913                 mature_immBlock(imature_blocks[i]);
1914         }
1915         DEL_ARR_F(imature_blocks);
1916         imature_blocks = NULL;
1917
1918         mature_immBlock(first_block);
1919         mature_immBlock(end_block);
1920
1921         irg_finalize_cons(irg);
1922
1923         /* finalize the frame type */
1924         ir_type *frame_type = get_irg_frame_type(irg);
1925         int      n          = get_compound_n_members(frame_type);
1926         int      align_all  = 4;
1927         int      offset     = 0;
1928         for(int i = 0; i < n; ++i) {
1929                 ir_entity *entity      = get_compound_member(frame_type, i);
1930                 ir_type   *entity_type = get_entity_type(entity);
1931
1932                 int align = get_type_alignment_bytes(entity_type);
1933                 if(align > align_all)
1934                         align_all = align;
1935                 int misalign = 0;
1936                 if(align > 0) {
1937                         misalign  = offset % align;
1938                         offset   += misalign;
1939                 }
1940
1941                 set_entity_offset(entity, offset);
1942                 offset += get_type_size_bytes(entity_type);
1943         }
1944         set_type_size_bytes(frame_type, offset);
1945         set_type_alignment_bytes(frame_type, align_all);
1946         set_type_state(frame_type, layout_fixed);
1947
1948         irg_vrfy(irg);
1949 }
1950
1951 static void create_global_variable(declaration_t *declaration)
1952 {
1953         ir_type   *global_type = get_glob_type();
1954         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
1955                                   global_type);
1956
1957         ir_entity *entity = declaration->v.entity;
1958         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
1959                 set_entity_visibility(entity, visibility_local);
1960         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
1961                 set_entity_visibility(entity, visibility_external_allocated);
1962         } else {
1963                 set_entity_visibility(entity, visibility_external_visible);
1964         }
1965         current_ir_graph = get_const_code_irg();
1966         create_initializer(declaration);
1967 }
1968
1969 static void context_to_firm(context_t *context)
1970 {
1971         declaration_t *declaration = context->declarations;
1972         for( ; declaration != NULL; declaration = declaration->next) {
1973                 if(declaration->namespace != NAMESPACE_NORMAL)
1974                         continue;
1975                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
1976                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
1977                         continue;
1978                 if(declaration->symbol == NULL)
1979                         continue;
1980
1981                 type_t *type = declaration->type;
1982                 if(type->type == TYPE_FUNCTION) {
1983                         create_function(declaration);
1984                 } else {
1985                         create_global_variable(declaration);
1986                 }
1987         }
1988 }
1989
1990 void translation_unit_to_firm(translation_unit_t *unit)
1991 {
1992         /* remove me later TODO FIXME */
1993         (void) get_type_size;
1994
1995         /* just to be sure */
1996         continue_label      = NULL;
1997         break_label         = NULL;
1998         current_switch_cond = NULL;
1999
2000         context_to_firm(& unit->context);
2001 }