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 bool      saw_default_label;
  36 static ir_node **imature_blocks;
  37
  38 static const declaration_t *current_function_decl;
  39 static ir_node             *current_function_name;
  40
  41 typedef enum declaration_type_t {
  42         DECLARATION_TYPE_UNKNOWN,
  43         DECLARATION_TYPE_FUNCTION,
  44         DECLARATION_TYPE_GLOBAL_VARIABLE,
  45         DECLARATION_TYPE_LOCAL_VARIABLE,
  46         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  47         DECLARATION_TYPE_COMPOUND_MEMBER,
  48         DECLARATION_TYPE_LABEL_BLOCK,
  49 } declaration_type_t;
  50
  51 static ir_type *get_ir_type(type_t *type);
  52
  53 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  54 {
  55         (void) pos;
  56 #if 0
  57         const declaration_t *declaration = & value_numbers[pos]->declaration;
  58
  59         print_warning_prefix(declaration->source_position);
  60         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  61                         declaration->symbol->string);
  62 #endif
  63         fprintf(stderr, "Some variable might be used uninitialized\n");
  64         return new_r_Unknown(irg, mode);
  65 }
  66
  67 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  68 {
  69         const source_position_t *pos = (const source_position_t*) dbg;
  70         if(pos == NULL)
  71                 return 0;
  72         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  73                                    pos->linenr);
  74 }
  75
  76 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  77 {
  78         const source_position_t *pos = (const source_position_t*) dbg;
  79         if(pos == NULL)
  80                 return NULL;
  81         if(line != NULL)
  82                 *line = pos->linenr;
  83         return pos->input_name;
  84 }
  85
  86 void init_ast2firm(void)
  87 {
  88         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  89         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
  90         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
  91
  92         ir_type_int        = get_ir_type(type_int);
  93         ir_type_const_char = get_ir_type(type_const_char);
  94         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  95                                                        type in firm */
  96         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
  97                                               ir_type_void, mode_P_data);
  98
  99         type_void->firm_type = ir_type_void;
 100 }
 101
 102 void exit_ast2firm(void)
 103 {
 104 }
 105
 106 static unsigned unique_id = 0;
 107
 108 static ident *unique_ident(const char *tag)
 109 {
 110         char buf[256];
 111
 112         snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
 113         unique_id++;
 114         return new_id_from_str(buf);
 115 }
 116
 117 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 118 {
 119         switch(atomic_type->atype) {
 120         case ATOMIC_TYPE_SCHAR:
 121         case ATOMIC_TYPE_CHAR:
 122                 return mode_Bs;
 123         case ATOMIC_TYPE_UCHAR:
 124                 return mode_Bu;
 125         case ATOMIC_TYPE_SHORT:
 126                 return mode_Hs;
 127         case ATOMIC_TYPE_USHORT:
 128                 return mode_Hu;
 129         case ATOMIC_TYPE_LONG:
 130         case ATOMIC_TYPE_INT:
 131                 return mode_Is;
 132         case ATOMIC_TYPE_ULONG:
 133         case ATOMIC_TYPE_UINT:
 134                 return mode_Iu;
 135         case ATOMIC_TYPE_LONGLONG:
 136                 return mode_Ls;
 137         case ATOMIC_TYPE_ULONGLONG:
 138                 return mode_Lu;
 139         case ATOMIC_TYPE_FLOAT:
 140                 return mode_F;
 141         case ATOMIC_TYPE_DOUBLE:
 142                 return mode_D;
 143         case ATOMIC_TYPE_LONG_DOUBLE:
 144                 return mode_E;
 145         case ATOMIC_TYPE_BOOL:
 146                 return mode_b;
 147 #ifdef PROVIDE_COMPLEX
 148         case ATOMIC_TYPE_FLOAT_COMPLEX:
 149         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 150         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 151                 panic("complex lowering not implemented yet");
 152                 break;
 153         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 154         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 155         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 156                 panic("imaginary lowering not implemented yet");
 157                 break;
 158 #endif
 159         case ATOMIC_TYPE_VOID:
 160                 /* firm has no real void... */
 161                 return mode_Is;
 162         case ATOMIC_TYPE_INVALID:
 163                 break;
 164         }
 165         panic("Encountered unknown atomic type");
 166 }
 167
 168
 169 static unsigned get_type_size(type_t *type);
 170
 171 static unsigned get_atomic_type_size(const atomic_type_t *type)
 172 {
 173         switch(type->atype) {
 174         case ATOMIC_TYPE_CHAR:
 175         case ATOMIC_TYPE_SCHAR:
 176         case ATOMIC_TYPE_UCHAR:
 177                 return 1;
 178
 179         case ATOMIC_TYPE_SHORT:
 180         case ATOMIC_TYPE_USHORT:
 181                 return 2;
 182
 183         case ATOMIC_TYPE_BOOL:
 184         case ATOMIC_TYPE_INT:
 185         case ATOMIC_TYPE_UINT:
 186         case ATOMIC_TYPE_LONG:
 187         case ATOMIC_TYPE_ULONG:
 188         case ATOMIC_TYPE_FLOAT:
 189                 return 4;
 190
 191         case ATOMIC_TYPE_LONGLONG:
 192         case ATOMIC_TYPE_ULONGLONG:
 193         case ATOMIC_TYPE_DOUBLE:
 194                 return 8;
 195
 196         case ATOMIC_TYPE_LONG_DOUBLE:
 197                 return 12;
 198
 199         case ATOMIC_TYPE_VOID:
 200                 return 1;
 201
 202         case ATOMIC_TYPE_INVALID:
 203                 break;
 204         }
 205         panic("Trying to determine size of invalid atomic type");
 206 }
 207
 208 static unsigned get_compound_type_size(compound_type_t *type)
 209 {
 210         ir_type *irtype = get_ir_type(&type->type);
 211         return get_type_size_bytes(irtype);
 212 }
 213
 214 static unsigned get_array_type_size(array_type_t *type)
 215 {
 216         ir_type *irtype = get_ir_type(&type->type);
 217         return get_type_size_bytes(irtype);
 218 }
 219
 220 static unsigned get_type_size(type_t *type)
 221 {
 222         type = skip_typeref(type);
 223
 224         switch(type->type) {
 225         case TYPE_ATOMIC:
 226                 return get_atomic_type_size((const atomic_type_t*) type);
 227         case TYPE_ENUM:
 228                 return get_mode_size_bytes(mode_Is);
 229         case TYPE_COMPOUND_UNION:
 230         case TYPE_COMPOUND_STRUCT:
 231                 return get_compound_type_size((compound_type_t*) type);
 232         case TYPE_FUNCTION:
 233                 /* just a pointer to the function */
 234                 return get_mode_size_bytes(mode_P_code);
 235         case TYPE_POINTER:
 236                 return get_mode_size_bytes(mode_P_data);
 237         case TYPE_ARRAY:
 238                 return get_array_type_size((array_type_t*) type);
 239         case TYPE_BUILTIN:
 240         case TYPE_TYPEDEF:
 241         case TYPE_TYPEOF:
 242         case TYPE_INVALID:
 243                 break;
 244         }
 245         panic("Trying to determine size of invalid type");
 246 }
 247
 248 static unsigned count_parameters(const function_type_t *function_type)
 249 {
 250         unsigned count = 0;
 251
 252         function_parameter_t *parameter = function_type->parameters;
 253         for ( ; parameter != NULL; parameter = parameter->next) {
 254                 ++count;
 255         }
 256
 257         return count;
 258 }
 259
 260
 261
 262
 263 static long fold_constant(const expression_t *expression);
 264
 265 static ir_type *create_atomic_type(const atomic_type_t *type)
 266 {
 267         ir_mode *mode   = get_atomic_mode(type);
 268         ident   *id     = get_mode_ident(mode);
 269         ir_type *irtype = new_type_primitive(id, mode);
 270
 271         return irtype;
 272 }
 273
 274 static ir_type *create_method_type(const function_type_t *function_type)
 275 {
 276         type_t  *result_type  = function_type->result_type;
 277
 278         ident   *id           = unique_ident("functiontype");
 279         int      n_parameters = count_parameters(function_type);
 280         int      n_results    = result_type == type_void ? 0 : 1;
 281         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 282
 283         if(result_type != type_void) {
 284                 ir_type *restype = get_ir_type(result_type);
 285                 set_method_res_type(irtype, 0, restype);
 286         }
 287
 288         function_parameter_t *parameter = function_type->parameters;
 289         int                   n         = 0;
 290         for( ; parameter != NULL; parameter = parameter->next) {
 291                 ir_type *p_irtype = get_ir_type(parameter->type);
 292                 set_method_param_type(irtype, n, p_irtype);
 293                 ++n;
 294         }
 295
 296         if(function_type->variadic || function_type->unspecified_parameters) {
 297                 set_method_variadicity(irtype, variadicity_variadic);
 298         }
 299
 300         return irtype;
 301 }
 302
 303 static ir_type *create_pointer_type(pointer_type_t *type)
 304 {
 305         type_t  *points_to = type->points_to;
 306         ir_type *ir_points_to;
 307         /* Avoid endless recursion if the points_to type contains this poiner type
 308          * again (might be a struct). We therefore first create a void* pointer
 309          * and then set the real points_to type
 310          */
 311         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 312                                             ir_type_void, mode_P_data);
 313         type->type.firm_type  = ir_type;
 314
 315         ir_points_to = get_ir_type(points_to);
 316         set_pointer_points_to_type(ir_type, ir_points_to);
 317
 318         return ir_type;
 319 }
 320
 321 static ir_type *create_array_type(array_type_t *type)
 322 {
 323         type_t  *element_type    = type->element_type;
 324         ir_type *ir_element_type = get_ir_type(element_type);
 325
 326         ident   *id      = unique_ident("array");
 327         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 328
 329         if(type->size != NULL) {
 330                 int n_elements = fold_constant(type->size);
 331
 332                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 333
 334                 size_t elemsize = get_type_size_bytes(ir_element_type);
 335                 int align = get_type_alignment_bytes(ir_element_type);
 336                 if(elemsize % align > 0) {
 337                         elemsize += align - (elemsize % align);
 338                 }
 339                 set_type_size_bytes(ir_type, n_elements * elemsize);
 340                 set_type_alignment_bytes(ir_type, align);
 341                 set_type_state(ir_type, layout_fixed);
 342         }
 343
 344         return ir_type;
 345 }
 346
 347 #define INVALID_TYPE ((ir_type_ptr)-1)
 348
 349 static ir_type *create_struct_type(compound_type_t *type)
 350 {
 351         symbol_t *symbol = type->declaration->symbol;
 352         ident    *id;
 353         if(symbol != NULL) {
 354                 id = unique_ident(symbol->string);
 355         } else {
 356                 id = unique_ident("__anonymous_struct");
 357         }
 358         ir_type *ir_type = new_type_struct(id);
 359
 360         type->type.firm_type = ir_type;
 361
 362         int align_all = 1;
 363         int offset    = 0;
 364         declaration_t *entry = type->declaration->context.declarations;
 365         for( ; entry != NULL; entry = entry->next) {
 366                 if(entry->namespc != NAMESPACE_NORMAL)
 367                         continue;
 368
 369                 ident       *ident         = new_id_from_str(entry->symbol->string);
 370                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 371
 372                 int entry_size      = get_type_size_bytes(entry_ir_type);
 373                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 374                 int misalign        = offset % entry_alignment;
 375                 if (misalign != 0)
 376                         offset += entry_alignment - misalign;
 377
 378                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 379                 set_entity_offset(entity, offset);
 380                 add_struct_member(ir_type, entity);
 381                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 382                 entry->v.entity         = entity;
 383
 384                 offset += entry_size;
 385                 if(entry_alignment > align_all) {
 386                         if(entry_alignment % align_all != 0) {
 387                                 panic("Uneven alignments not supported yet");
 388                         }
 389                         align_all = entry_alignment;
 390                 }
 391         }
 392
 393         int misalign = offset % align_all;
 394         offset += misalign;
 395         set_type_alignment_bytes(ir_type, align_all);
 396         set_type_size_bytes(ir_type, offset);
 397         set_type_state(ir_type, layout_fixed);
 398
 399         return ir_type;
 400 }
 401
 402 static ir_type *create_union_type(compound_type_t *type)
 403 {
 404         declaration_t *declaration = type->declaration;
 405         symbol_t      *symbol      = declaration->symbol;
 406         ident         *id;
 407         if(symbol != NULL) {
 408                 id = unique_ident(symbol->string);
 409         } else {
 410                 id = unique_ident("__anonymous_union");
 411         }
 412         ir_type  *ir_type = new_type_union(id);
 413
 414         type->type.firm_type = ir_type;
 415
 416         int align_all = 1;
 417         int size      = 0;
 418         declaration_t *entry = declaration->context.declarations;
 419         for( ; entry != NULL; entry = entry->next) {
 420                 if(entry->namespc != NAMESPACE_NORMAL)
 421                         continue;
 422
 423                 ident       *ident         = new_id_from_str(entry->symbol->string);
 424                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 425
 426                 int entry_size      = get_type_size_bytes(entry_ir_type);
 427                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 428
 429                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 430                 add_union_member(ir_type, entity);
 431                 set_entity_offset(entity, 0);
 432                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 433                 entry->v.entity         = entity;
 434
 435                 if(entry_size > size) {
 436                         size = entry_size;
 437                 }
 438                 if(entry_alignment > align_all) {
 439                         if(entry_alignment % align_all != 0) {
 440                                 panic("Uneven alignments not supported yet");
 441                         }
 442                         align_all = entry_alignment;
 443                 }
 444         }
 445
 446         set_type_alignment_bytes(ir_type, align_all);
 447         set_type_size_bytes(ir_type, size);
 448         set_type_state(ir_type, layout_fixed);
 449
 450         return ir_type;
 451 }
 452
 453 static ir_type *get_ir_type(type_t *type)
 454 {
 455         assert(type != NULL);
 456
 457         type = skip_typeref(type);
 458
 459         if(type->firm_type != NULL) {
 460                 assert(type->firm_type != INVALID_TYPE);
 461                 return type->firm_type;
 462         }
 463
 464         ir_type *firm_type = NULL;
 465         switch(type->type) {
 466         case TYPE_ATOMIC:
 467                 firm_type = create_atomic_type((atomic_type_t*) type);
 468                 break;
 469         case TYPE_FUNCTION:
 470                 firm_type = create_method_type((function_type_t*) type);
 471                 break;
 472         case TYPE_POINTER:
 473                 firm_type = create_pointer_type((pointer_type_t*) type);
 474                 break;
 475         case TYPE_ARRAY:
 476                 firm_type = create_array_type((array_type_t*) type);
 477                 break;
 478         case TYPE_COMPOUND_STRUCT:
 479                 firm_type = create_struct_type((compound_type_t*) type);
 480                 break;
 481         case TYPE_COMPOUND_UNION:
 482                 firm_type = create_union_type((compound_type_t*) type);
 483                 break;
 484         case TYPE_ENUM:
 485                 firm_type = ir_type_int;
 486                 break;
 487         case TYPE_BUILTIN:
 488         case TYPE_TYPEOF:
 489         case TYPE_TYPEDEF:
 490         case TYPE_INVALID:
 491                 break;
 492         }
 493         if(firm_type == NULL)
 494                 panic("unknown type found");
 495
 496         type->firm_type = firm_type;
 497         return firm_type;
 498 }
 499
 500 static inline ir_mode *get_ir_mode(type_t *type)
 501 {
 502         ir_type *irtype = get_ir_type(type);
 503
 504         /* firm doesn't report a mode for arrays somehow... */
 505         if(is_Array_type(irtype)) {
 506                 return mode_P;
 507         }
 508
 509         ir_mode *mode = get_type_mode(irtype);
 510         assert(mode != NULL);
 511         return mode;
 512 }
 513
 514 static ir_entity* get_function_entity(declaration_t *declaration)
 515 {
 516         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 517                 return declaration->v.entity;
 518         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 519
 520         symbol_t *symbol = declaration->symbol;
 521         ident    *id     = new_id_from_str(symbol->string);
 522
 523         ir_type  *global_type    = get_glob_type();
 524         ir_type  *ir_type_method = get_ir_type(declaration->type);
 525         assert(is_Method_type(ir_type_method));
 526
 527         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 528         set_entity_ld_ident(entity, id);
 529         if(declaration->storage_class == STORAGE_CLASS_STATIC
 530                         || declaration->is_inline) {
 531                 set_entity_visibility(entity, visibility_local);
 532         } else if(declaration->init.statement != NULL) {
 533                 set_entity_visibility(entity, visibility_external_visible);
 534         } else {
 535                 set_entity_visibility(entity, visibility_external_allocated);
 536         }
 537
 538         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 539         declaration->v.entity         = entity;
 540
 541         return entity;
 542 }
 543
 544
 545
 546 static ir_node *expression_to_firm(const expression_t *expression);
 547
 548 static dbg_info *get_dbg_info(const source_position_t *pos)
 549 {
 550         return (dbg_info*) pos;
 551 }
 552
 553 static ir_node *const_to_firm(const const_t *cnst)
 554 {
 555         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 556         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 557
 558         tarval   *tv;
 559         if(mode_is_float(mode)) {
 560                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 561         } else {
 562                 tv = new_tarval_from_long(cnst->v.int_value, mode);
 563         }
 564
 565         return new_d_Const(dbgi, mode, tv);
 566 }
 567
 568 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 569 {
 570         assert(entity != NULL);
 571         union symconst_symbol sym;
 572         sym.entity_p = entity;
 573         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 574 }
 575
 576 static ir_node *string_to_firm(const source_position_t *const src_pos,
 577                                const char *const id_prefix,
 578                                const char *const string)
 579 {
 580         ir_type *const global_type = get_glob_type();
 581         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 582                                                     ir_type_const_char);
 583
 584         ident     *const id     = unique_ident(id_prefix);
 585         ir_entity *const entity = new_entity(global_type, id, type);
 586         set_entity_ld_ident(entity, id);
 587         set_entity_variability(entity, variability_constant);
 588
 589         ir_type *const elem_type = ir_type_const_char;
 590         ir_mode *const mode      = get_type_mode(elem_type);
 591
 592         const size_t slen = strlen(string) + 1;
 593
 594         set_array_lower_bound_int(type, 0, 0);
 595         set_array_upper_bound_int(type, 0, slen);
 596         set_type_size_bytes(type, slen);
 597         set_type_state(type, layout_fixed);
 598
 599         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 600         for(size_t i = 0; i < slen; ++i) {
 601                 tvs[i] = new_tarval_from_long(string[i], mode);
 602         }
 603
 604         set_array_entity_values(entity, tvs, slen);
 605         free(tvs);
 606
 607         dbg_info *const dbgi = get_dbg_info(src_pos);
 608
 609         return create_symconst(dbgi, entity);
 610 }
 611
 612 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 613 {
 614         return string_to_firm(&literal->expression.source_position, "Lstr",
 615                               literal->value);
 616 }
 617
 618 static ir_node *deref_address(type_t *const type, ir_node *const addr,
 619                               dbg_info *const dbgi)
 620 {
 621         switch (type->type) {
 622                 case TYPE_ARRAY:
 623                 case TYPE_COMPOUND_STRUCT:
 624                 case TYPE_COMPOUND_UNION:
 625                         return addr;
 626
 627                 default: {
 628                         ir_mode *const mode     = get_ir_mode(type);
 629                         ir_node *const memory   = get_store();
 630                         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
 631                         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 632                         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
 633                         set_store(load_mem);
 634                         return load_res;
 635                 }
 636         }
 637 }
 638
 639 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 640 {
 641         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 642         declaration_t *declaration = ref->declaration;
 643         type_t        *type        = skip_typeref(declaration->type);
 644
 645         switch((declaration_type_t) declaration->declaration_type) {
 646         case DECLARATION_TYPE_UNKNOWN:
 647                 break;
 648         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 649                 ir_mode *mode = get_ir_mode(type);
 650                 return get_value(declaration->v.value_number, mode);
 651         }
 652         case DECLARATION_TYPE_FUNCTION: {
 653                 return create_symconst(dbgi, declaration->v.entity);
 654         }
 655         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 656                 ir_entity *entity   = declaration->v.entity;
 657                 ir_node   *symconst = create_symconst(dbgi, entity);
 658                 return deref_address(type, symconst, dbgi);
 659         }
 660         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 661                 ir_entity *entity = declaration->v.entity;
 662                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 663                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 664                 return deref_address(type, sel, dbgi);
 665         }
 666
 667         case DECLARATION_TYPE_COMPOUND_MEMBER:
 668         case DECLARATION_TYPE_LABEL_BLOCK:
 669                 panic("not implemented reference type");
 670         }
 671
 672         panic("reference to declaration with unknown type found");
 673 }
 674
 675 static ir_node *reference_addr(const reference_expression_t *ref)
 676 {
 677         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 678         declaration_t *declaration = ref->declaration;
 679
 680         switch((declaration_type_t) declaration->declaration_type) {
 681         case DECLARATION_TYPE_UNKNOWN:
 682                 break;
 683         case DECLARATION_TYPE_LOCAL_VARIABLE:
 684                 panic("local variable without entity has no address");
 685         case DECLARATION_TYPE_FUNCTION: {
 686                 return create_symconst(dbgi, declaration->v.entity);
 687         }
 688         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 689                 ir_entity *entity   = declaration->v.entity;
 690                 ir_node   *symconst = create_symconst(dbgi, entity);
 691                 return symconst;
 692         }
 693         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 694                 ir_entity *entity = declaration->v.entity;
 695                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 696                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 697
 698                 return sel;
 699         }
 700         case DECLARATION_TYPE_COMPOUND_MEMBER:
 701         case DECLARATION_TYPE_LABEL_BLOCK:
 702                 panic("not implemented reference type");
 703         }
 704
 705         panic("reference to declaration with unknown type found");
 706 }
 707
 708 static ir_node *call_expression_to_firm(const call_expression_t *call)
 709 {
 710         assert(get_cur_block() != NULL);
 711
 712         expression_t  *function = call->function;
 713         ir_node       *callee   = expression_to_firm(function);
 714
 715         function_type_t *function_type;
 716         if (function->datatype->type == TYPE_POINTER) {
 717                 pointer_type_t *const ptr_type = (pointer_type_t*)function->datatype;
 718                 assert(ptr_type->points_to->type == TYPE_FUNCTION);
 719                 function_type = (function_type_t*)ptr_type->points_to;
 720         } else {
 721                 assert(function->datatype->type == TYPE_FUNCTION);
 722                 function_type = (function_type_t*)function->datatype;
 723         }
 724
 725         int              n_parameters = 0;
 726         call_argument_t *argument     = call->arguments;
 727         for( ; argument != NULL; argument = argument->next) {
 728                 ++n_parameters;
 729         }
 730
 731         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 732         ir_type *new_method_type = NULL;
 733         if(function_type->variadic || function_type->unspecified_parameters) {
 734                 /* we need to construct a new method type matching the call
 735                  * arguments... */
 736                 int n_res       = get_method_n_ress(ir_method_type);
 737                 new_method_type = new_type_method(unique_ident("calltype"),
 738                                                   n_parameters, n_res);
 739                 set_method_calling_convention(new_method_type,
 740                                get_method_calling_convention(ir_method_type));
 741                 set_method_additional_properties(new_method_type,
 742                                get_method_additional_properties(ir_method_type));
 743
 744                 for(int i = 0; i < n_res; ++i) {
 745                         set_method_res_type(new_method_type, i,
 746                                             get_method_res_type(ir_method_type, i));
 747                 }
 748         }
 749         ir_node *in[n_parameters];
 750
 751         argument = call->arguments;
 752         int n = 0;
 753         for( ; argument != NULL; argument = argument->next) {
 754                 expression_t *expression = argument->expression;
 755                 ir_node      *arg_node   = expression_to_firm(expression);
 756
 757                 in[n] = arg_node;
 758                 if(new_method_type != NULL) {
 759                         ir_type *irtype = get_ir_type(expression->datatype);
 760                         set_method_param_type(new_method_type, n, irtype);
 761                 }
 762
 763                 n++;
 764         }
 765         assert(n == n_parameters);
 766
 767         if(new_method_type != NULL)
 768                 ir_method_type = new_method_type;
 769
 770         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 771         ir_node  *store = get_store();
 772         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 773                                      ir_method_type);
 774         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 775         set_store(mem);
 776
 777         type_t  *result_type = function_type->result_type;
 778         ir_node *result      = NULL;
 779         if(result_type != type_void) {
 780                 ir_mode *mode    = get_ir_mode(result_type);
 781                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 782                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 783         }
 784
 785         return result;
 786 }
 787
 788 static ir_node *expression_to_addr(const expression_t *expression);
 789 static void create_condition_evaluation(const expression_t *expression,
 790                                         ir_node *true_block,
 791                                         ir_node *false_block);
 792
 793 static void set_value_for_expression(const expression_t *expression,
 794                                      ir_node *value)
 795 {
 796         if(expression->type == EXPR_REFERENCE) {
 797                 reference_expression_t *ref = (reference_expression_t*) expression;
 798
 799                 declaration_t *declaration = ref->declaration;
 800                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 801                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 802                         set_value(declaration->v.value_number, value);
 803                         return;
 804                 }
 805         }
 806
 807         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 808         ir_node  *addr      = expression_to_addr(expression);
 809         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 810         ir_node  *memory    = get_store();
 811         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 812         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 813         set_store(store_mem);
 814 }
 815
 816 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 817 {
 818         ir_mode *value_mode = get_irn_mode(value);
 819
 820         if (value_mode == dest_mode || is_Bad(value))
 821                 return value;
 822
 823         if(dest_mode == mode_b) {
 824                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 825                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 826                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 827                 return proj;
 828         }
 829
 830         return new_d_Conv(dbgi, value, dest_mode);
 831 }
 832
 833 static ir_node *create_incdec(const unary_expression_t *expression)
 834 {
 835         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
 836         type_t       *type  = expression->expression.datatype;
 837         ir_mode      *mode  = get_ir_mode(type);
 838         expression_t *value = expression->value;
 839
 840         ir_node *value_node = expression_to_firm(value);
 841
 842         ir_node *offset;
 843         if(type->type == TYPE_POINTER) {
 844                 pointer_type_t *pointer_type = (pointer_type_t*) type;
 845                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
 846                 offset = new_Const_long(mode_Is, elem_size);
 847         } else {
 848                 assert(is_type_arithmetic(type));
 849                 offset = new_Const(mode, get_mode_one(mode));
 850         }
 851
 852         ir_node *new_value;
 853         switch(expression->type) {
 854         case UNEXPR_POSTFIX_INCREMENT: {
 855                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 856                 set_value_for_expression(value, new_value);
 857                 return value_node;
 858         }
 859         case UNEXPR_POSTFIX_DECREMENT: {
 860                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 861                 set_value_for_expression(value, new_value);
 862                 return value_node;
 863         }
 864         case UNEXPR_PREFIX_INCREMENT: {
 865                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 866                 set_value_for_expression(value, new_value);
 867                 return new_value;
 868         }
 869         case UNEXPR_PREFIX_DECREMENT: {
 870                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 871                 set_value_for_expression(value, new_value);
 872                 return new_value;
 873         }
 874         default:
 875                 panic("no incdec expr in create_incdec");
 876         }
 877
 878         return new_value;
 879 }
 880
 881 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 882 {
 883         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 884         type_t   *type = expression->expression.datatype;
 885
 886         if(expression->type == UNEXPR_TAKE_ADDRESS)
 887                 return expression_to_addr(expression->value);
 888
 889         const expression_t *value      = expression->value;
 890         ir_node            *value_node = expression_to_firm(value);
 891
 892         switch(expression->type) {
 893         case UNEXPR_NEGATE:
 894                 return new_d_Minus(dbgi, value_node, get_ir_mode(type));
 895         case UNEXPR_PLUS:
 896                 return value_node;
 897         case UNEXPR_BITWISE_NEGATE:
 898                 return new_d_Not(dbgi, value_node, get_ir_mode(type));
 899         case UNEXPR_NOT: {
 900                 if(get_irn_mode(value_node) != mode_b) {
 901                         value_node = create_conv(dbgi, value_node, mode_b);
 902                 }
 903                 value_node = new_d_Not(dbgi, value_node, mode_b);
 904                 ir_mode *const mode = get_ir_mode(type);
 905                 if(mode != mode_b) {
 906                         value_node = create_conv(dbgi, value_node, mode);
 907                 }
 908                 return value_node;
 909         }
 910         case UNEXPR_DEREFERENCE:
 911                 return deref_address(type, value_node, dbgi);
 912         case UNEXPR_POSTFIX_INCREMENT:
 913         case UNEXPR_POSTFIX_DECREMENT:
 914         case UNEXPR_PREFIX_INCREMENT:
 915         case UNEXPR_PREFIX_DECREMENT:
 916                 return create_incdec(expression);
 917         case UNEXPR_CAST:
 918                 return create_conv(dbgi, value_node, get_ir_mode(type));
 919
 920         case UNEXPR_TAKE_ADDRESS:
 921         case UNEXPR_INVALID:
 922                 break;
 923         }
 924         panic("invalid UNEXPR type found");
 925 }
 926
 927 static long get_pnc(binary_expression_type_t type)
 928 {
 929         switch(type) {
 930         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 931         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 932         case BINEXPR_LESS:         return pn_Cmp_Lt;
 933         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 934         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 935         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 936         default:
 937                 break;
 938         }
 939         panic("trying to get pn_Cmp from non-comparison binexpr type");
 940 }
 941
 942 static ir_node *create_lazy_op(const binary_expression_t *expression)
 943 {
 944         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 945         type_t   *type = expression->expression.datatype;
 946         ir_mode  *mode = get_ir_mode(type);
 947
 948         ir_node *cur_block = get_cur_block();
 949
 950         ir_node *one_block = new_immBlock();
 951         ir_node *one       = new_Const(mode, get_mode_one(mode));
 952         ir_node *jmp_one   = new_d_Jmp(dbgi);
 953
 954         ir_node *zero_block = new_immBlock();
 955         ir_node *zero       = new_Const(mode, get_mode_null(mode));
 956         ir_node *jmp_zero   = new_d_Jmp(dbgi);
 957
 958         set_cur_block(cur_block);
 959         create_condition_evaluation((const expression_t*) expression,
 960                                     one_block, zero_block);
 961         mature_immBlock(one_block);
 962         mature_immBlock(zero_block);
 963
 964         ir_node *common_block = new_immBlock();
 965         add_immBlock_pred(common_block, jmp_one);
 966         add_immBlock_pred(common_block, jmp_zero);
 967         mature_immBlock(common_block);
 968
 969         ir_node *in[2] = { one, zero };
 970         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
 971
 972         return val;
 973 }
 974
 975 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
 976                                             ir_node *right, ir_mode *mode);
 977
 978 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
 979                                         create_arithmetic_func func)
 980 {
 981         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 982         ir_node  *left  = expression_to_firm(expression->left);
 983         ir_node  *right = expression_to_firm(expression->right);
 984         type_t   *type  = expression->right->datatype;
 985         /* be careful with the modes, because in arithmetic assign nodes only
 986          * the right operand has the mode of the arithmetic already */
 987         ir_mode  *mode  = get_ir_mode(type);
 988         left            = create_conv(dbgi, left, mode);
 989         ir_node  *res   = func(dbgi, left, right, mode);
 990
 991         return res;
 992 }
 993
 994 static ir_node *pointer_arithmetic(ir_node  *const pointer,
 995                                    ir_node  *      integer,
 996                                    type_t   *const type,
 997                                    dbg_info *const dbgi,
 998                                    const create_arithmetic_func func)
 999 {
1000         pointer_type_t *const pointer_type = (pointer_type_t*)type;
1001         type_t         *const points_to    = pointer_type->points_to;
1002         const unsigned        elem_size    = get_type_size(points_to);
1003
1004         assert(elem_size >= 1);
1005         if (elem_size > 1) {
1006                 integer             = create_conv(dbgi, integer, mode_Is);
1007                 ir_node *const cnst = new_Const_long(mode_Is, (long)elem_size);
1008                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
1009                 integer = mul;
1010         }
1011
1012         ir_mode *const mode = get_ir_mode(type);
1013         return func(dbgi, pointer, integer, mode);
1014 }
1015
1016 static ir_node *create_arithmetic_assign_binop(
1017                 const binary_expression_t *expression, create_arithmetic_func func)
1018 {
1019         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1020         type_t   *const type = expression->expression.datatype;
1021         ir_node  *value;
1022
1023         if (type->type == TYPE_POINTER) {
1024                 ir_node        *const pointer = expression_to_firm(expression->left);
1025                 ir_node        *      integer = expression_to_firm(expression->right);
1026                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1027         } else {
1028                 value = create_arithmetic_binop(expression, func);
1029         }
1030
1031         ir_mode  *const mode = get_ir_mode(type);
1032         value = create_conv(dbgi, value, mode);
1033         set_value_for_expression(expression->left, value);
1034
1035         return value;
1036 }
1037
1038 static ir_node *create_add(const binary_expression_t *expression)
1039 {
1040         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1041         ir_node  *left  = expression_to_firm(expression->left);
1042         ir_node  *right = expression_to_firm(expression->right);
1043         type_t   *type  = expression->expression.datatype;
1044
1045         expression_t *expr_left  = expression->left;
1046         expression_t *expr_right = expression->right;
1047         type_t       *type_left  = skip_typeref(expr_left->datatype);
1048         type_t       *type_right = skip_typeref(expr_right->datatype);
1049
1050         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1051                 ir_mode *const mode = get_ir_mode(type);
1052                 return new_d_Add(dbgi, left, right, mode);
1053         }
1054
1055         if (type_left->type == TYPE_POINTER || type_left->type == TYPE_ARRAY) {
1056                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1057         } else {
1058                 assert(type_right->type == TYPE_POINTER || type_right->type == TYPE_ARRAY);
1059                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1060         }
1061 }
1062
1063 static ir_node *create_sub(const binary_expression_t *expression)
1064 {
1065         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1066         expression_t *const expr_left  = expression->left;
1067         expression_t *const expr_right = expression->right;
1068         ir_node      *const left       = expression_to_firm(expr_left);
1069         ir_node      *const right      = expression_to_firm(expr_right);
1070         type_t       *const type       = expression->expression.datatype;
1071         type_t       *const type_left  = skip_typeref(expr_left->datatype);
1072         type_t       *const type_right = skip_typeref(expr_right->datatype);
1073
1074         if ((is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) ||
1075             (type_left->type == TYPE_POINTER && type_right->type == TYPE_POINTER)) {
1076                 ir_mode *const mode = get_ir_mode(type);
1077                 return new_d_Sub(dbgi, left, right, mode);
1078         }
1079
1080         assert(type_left->type == TYPE_POINTER);
1081         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1082 }
1083
1084 static ir_node *create_shift(const binary_expression_t *expression)
1085 {
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         type_t   *type  = expression->expression.datatype;
1090         ir_mode  *mode  = get_ir_mode(type);
1091
1092         /* firm always wants the shift count to be unsigned */
1093         right = create_conv(dbgi, right, mode_Iu);
1094
1095         ir_node *res;
1096
1097         switch(expression->type) {
1098         case BINEXPR_SHIFTLEFT:
1099                 res = new_d_Shl(dbgi, left, right, mode);
1100                 break;
1101         case BINEXPR_SHIFTRIGHT: {
1102                  expression_t *expr_left = expression->left;
1103                  type_t       *type_left = skip_typeref(expr_left->datatype);
1104
1105                  if(is_type_signed(type_left)) {
1106                         res = new_d_Shrs(dbgi, left, right, mode);
1107                  } else {
1108                          res = new_d_Shr(dbgi, left, right, mode);
1109                  }
1110                  break;
1111         }
1112         default:
1113                 panic("create shift op called for non-shift op");
1114         }
1115
1116         return res;
1117 }
1118
1119
1120 static ir_node *create_divmod(const binary_expression_t *expression)
1121 {
1122         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1123         ir_node  *left  = expression_to_firm(expression->left);
1124         ir_node  *right = expression_to_firm(expression->right);
1125         ir_node  *pin   = new_Pin(new_NoMem());
1126         type_t   *type  = expression->expression.datatype;
1127         ir_mode  *mode  = get_ir_mode(type);
1128         ir_node  *op;
1129         ir_node  *res;
1130
1131         switch (expression->type)  {
1132                 case BINEXPR_DIV:
1133                 case BINEXPR_DIV_ASSIGN:
1134                         if(mode_is_float(mode)) {
1135                                 op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1136                                 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1137                         } else {
1138                                 op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1139                                 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1140                         }
1141                         break;
1142
1143                 case BINEXPR_MOD:
1144                 case BINEXPR_MOD_ASSIGN:
1145                         assert(!mode_is_float(mode));
1146                         op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1147                         res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1148                         break;
1149
1150                 default: panic("unexpected binary expression type in create_divmod()");
1151         }
1152
1153         return res;
1154 }
1155
1156 static ir_node *create_arithmetic_assign_divmod(
1157                 const binary_expression_t *expression)
1158 {
1159         ir_node  *      value = create_divmod(expression);
1160         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1161         type_t   *const type  = expression->expression.datatype;
1162         ir_mode  *const mode  = get_ir_mode(type);
1163
1164         assert(type->type != TYPE_POINTER);
1165
1166         value = create_conv(dbgi, value, mode);
1167         set_value_for_expression(expression->left, value);
1168
1169         return value;
1170 }
1171
1172
1173 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1174 {
1175         binary_expression_type_t type = expression->type;
1176         switch(type) {
1177         case BINEXPR_EQUAL:
1178         case BINEXPR_NOTEQUAL:
1179         case BINEXPR_LESS:
1180         case BINEXPR_LESSEQUAL:
1181         case BINEXPR_GREATER:
1182         case BINEXPR_GREATEREQUAL: {
1183                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1184                 ir_node *left  = expression_to_firm(expression->left);
1185                 ir_node *right = expression_to_firm(expression->right);
1186                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1187                 long     pnc   = get_pnc(type);
1188                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1189                 return proj;
1190         }
1191         case BINEXPR_ASSIGN: {
1192                 ir_node *right = expression_to_firm(expression->right);
1193                 set_value_for_expression(expression->left, right);
1194                 return right;
1195         }
1196         case BINEXPR_ADD:
1197                 return create_add(expression);
1198         case BINEXPR_SUB:
1199                 return create_sub(expression);
1200         case BINEXPR_MUL:
1201                 return create_arithmetic_binop(expression, new_d_Mul);
1202         case BINEXPR_BITWISE_AND:
1203                 return create_arithmetic_binop(expression, new_d_And);
1204         case BINEXPR_BITWISE_OR:
1205                 return create_arithmetic_binop(expression, new_d_Or);
1206         case BINEXPR_BITWISE_XOR:
1207                 return create_arithmetic_binop(expression, new_d_Eor);
1208         case BINEXPR_SHIFTLEFT:
1209         case BINEXPR_SHIFTRIGHT:
1210                 return create_shift(expression);
1211         case BINEXPR_DIV:
1212         case BINEXPR_MOD:
1213                 return create_divmod(expression);
1214         case BINEXPR_LOGICAL_AND:
1215         case BINEXPR_LOGICAL_OR:
1216                 return create_lazy_op(expression);
1217         case BINEXPR_COMMA:
1218                 expression_to_firm(expression->left);
1219                 return expression_to_firm(expression->right);
1220         case BINEXPR_ADD_ASSIGN:
1221                 return create_arithmetic_assign_binop(expression, new_d_Add);
1222         case BINEXPR_SUB_ASSIGN:
1223                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1224         case BINEXPR_MUL_ASSIGN:
1225                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1226         case BINEXPR_DIV_ASSIGN:
1227                 return create_arithmetic_assign_divmod(expression);
1228         case BINEXPR_BITWISE_AND_ASSIGN:
1229                 return create_arithmetic_assign_binop(expression, new_d_And);
1230         case BINEXPR_BITWISE_OR_ASSIGN:
1231                 return create_arithmetic_assign_binop(expression, new_d_Or);
1232         case BINEXPR_BITWISE_XOR_ASSIGN:
1233                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1234         case BINEXPR_SHIFTLEFT_ASSIGN:
1235                 return create_arithmetic_assign_binop(expression, new_d_Shl);
1236         case BINEXPR_SHIFTRIGHT_ASSIGN:
1237                 return create_arithmetic_assign_binop(expression, new_d_Shr);
1238         default:
1239                 panic("TODO binexpr type");
1240         }
1241 }
1242
1243 static ir_node *array_access_addr(const array_access_expression_t *expression)
1244 {
1245         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1246
1247         ir_node *base_addr = expression_to_firm(expression->array_ref);
1248         ir_node *offset    = expression_to_firm(expression->index);
1249         offset             = create_conv(dbgi, offset, mode_Iu);
1250
1251         unsigned elem_size       = get_type_size(expression->expression.datatype);
1252         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1253         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1254                                              mode_Iu);
1255         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1256
1257         return result;
1258 }
1259
1260 static ir_node *array_access_to_firm(
1261                 const array_access_expression_t *expression)
1262 {
1263         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1264         ir_node  *addr = array_access_addr(expression);
1265         type_t   *type = skip_typeref(expression->expression.datatype);
1266         return deref_address(type, addr, dbgi);
1267 }
1268
1269 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1270 {
1271         type_t *type = expression->type;
1272         if(type == NULL) {
1273                 type = expression->size_expression->datatype;
1274                 assert(type != NULL);
1275         }
1276
1277         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1278         unsigned  size      = get_type_size(type);
1279         ir_node  *size_node = new_Const_long(mode, size);
1280
1281         return size_node;
1282 }
1283
1284 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1285 {
1286         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1287
1288         ir_node *cur_block   = get_cur_block();
1289
1290         /* create the true block */
1291         ir_node *true_block  = new_immBlock();
1292
1293         ir_node *true_val = expression_to_firm(expression->true_expression);
1294         ir_node *true_jmp = new_Jmp();
1295
1296         /* create the false block */
1297         ir_node *false_block = new_immBlock();
1298
1299         ir_node *false_val = expression_to_firm(expression->false_expression);
1300         ir_node *false_jmp = new_Jmp();
1301
1302         /* create the condition evaluation */
1303         set_cur_block(cur_block);
1304         create_condition_evaluation(expression->condition, true_block, false_block);
1305         mature_immBlock(true_block);
1306         mature_immBlock(false_block);
1307
1308         /* create the common block */
1309         ir_node *common_block = new_immBlock();
1310         add_immBlock_pred(common_block, true_jmp);
1311         add_immBlock_pred(common_block, false_jmp);
1312         mature_immBlock(common_block);
1313
1314         ir_node *in[2] = { true_val, false_val };
1315         ir_mode *mode  = get_irn_mode(true_val);
1316         assert(get_irn_mode(false_val) == mode);
1317         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1318
1319         return val;
1320 }
1321
1322 static ir_node *select_addr(const select_expression_t *expression)
1323 {
1324         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1325
1326         ir_node *compound_addr = expression_to_firm(expression->compound);
1327
1328         declaration_t *entry = expression->compound_entry;
1329         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1330         ir_entity     *entity = entry->v.entity;
1331
1332         assert(entity != NULL);
1333
1334         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1335
1336         return sel;
1337 }
1338
1339 static ir_node *select_to_firm(const select_expression_t *expression)
1340 {
1341         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1342         ir_node  *addr = select_addr(expression);
1343         type_t   *type = skip_typeref(expression->expression.datatype);
1344         return deref_address(type, addr, dbgi);
1345 }
1346
1347 /* Values returned by __builtin_classify_type. */
1348 typedef enum gcc_type_class
1349 {
1350         no_type_class = -1,
1351         void_type_class,
1352         integer_type_class,
1353         char_type_class,
1354         enumeral_type_class,
1355         boolean_type_class,
1356         pointer_type_class,
1357         reference_type_class,
1358         offset_type_class,
1359         real_type_class,
1360         complex_type_class,
1361         function_type_class,
1362         method_type_class,
1363         record_type_class,
1364         union_type_class,
1365         array_type_class,
1366         string_type_class,
1367         set_type_class,
1368         file_type_class,
1369         lang_type_class
1370 } gcc_type_class;
1371
1372 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
1373 {
1374         const type_t *const type = expr->type_expression->datatype;
1375
1376         gcc_type_class tc;
1377         switch (type->type)
1378         {
1379                 case TYPE_ATOMIC: {
1380                         const atomic_type_t *const atomic_type = (const atomic_type_t*)type;
1381                         switch (atomic_type->atype) {
1382                                 // should not be reached
1383                                 case ATOMIC_TYPE_INVALID:
1384                                         tc = no_type_class;
1385                                         break;
1386
1387                                 // gcc cannot do that
1388                                 case ATOMIC_TYPE_VOID:
1389                                         tc = void_type_class;
1390                                         break;
1391
1392                                 case ATOMIC_TYPE_CHAR:      // gcc handles this as integer
1393                                 case ATOMIC_TYPE_SCHAR:     // gcc handles this as integer
1394                                 case ATOMIC_TYPE_UCHAR:     // gcc handles this as integer
1395                                 case ATOMIC_TYPE_SHORT:
1396                                 case ATOMIC_TYPE_USHORT:
1397                                 case ATOMIC_TYPE_INT:
1398                                 case ATOMIC_TYPE_UINT:
1399                                 case ATOMIC_TYPE_LONG:
1400                                 case ATOMIC_TYPE_ULONG:
1401                                 case ATOMIC_TYPE_LONGLONG:
1402                                 case ATOMIC_TYPE_ULONGLONG:
1403                                 case ATOMIC_TYPE_BOOL:      // gcc handles this as integer
1404                                         tc = integer_type_class;
1405                                         break;
1406
1407                                 case ATOMIC_TYPE_FLOAT:
1408                                 case ATOMIC_TYPE_DOUBLE:
1409                                 case ATOMIC_TYPE_LONG_DOUBLE:
1410                                         tc = real_type_class;
1411                                         break;
1412
1413 #ifdef PROVIDE_COMPLEX
1414                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
1415                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
1416                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
1417                                         tc = complex_type_class;
1418                                         break;
1419 #endif
1420
1421 #ifdef PROVIDE_IMAGINARY
1422                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
1423                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
1424                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
1425                                         tc = complex_type_class;
1426                                         break;
1427 #endif
1428
1429                                 default:
1430                                         panic("Unimplemented case in classify_type_to_firm().");
1431                         }
1432                         break;
1433                 }
1434
1435                 case TYPE_ARRAY:           // gcc handles this as pointer
1436                 case TYPE_FUNCTION:        // gcc handles this as pointer
1437                 case TYPE_POINTER:         tc = pointer_type_class; break;
1438                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
1439                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
1440
1441                 // gcc handles this as integer
1442                 case TYPE_ENUM:            tc = integer_type_class; break;
1443
1444                 default:
1445                         panic("Unimplemented case in classify_type_to_firm().");
1446         }
1447
1448         dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
1449         ir_mode  *const mode = mode_Is;
1450         tarval   *const tv   = new_tarval_from_long(tc, mode);
1451         return new_d_Const(dbgi, mode, tv);
1452 }
1453
1454 static ir_node *function_name_to_firm(const string_literal_t *const expr)
1455 {
1456         if (current_function_name == NULL) {
1457                 const source_position_t *const src_pos =
1458                         &expr->expression.source_position;
1459                 const char *const name = current_function_decl->symbol->string;
1460                 current_function_name = string_to_firm(src_pos, "__func__", name);
1461         }
1462
1463         return current_function_name;
1464 }
1465
1466 static ir_node *dereference_addr(const unary_expression_t *const expression)
1467 {
1468         assert(expression->type == UNEXPR_DEREFERENCE);
1469         return expression_to_firm(expression->value);
1470 }
1471
1472 static ir_node *expression_to_addr(const expression_t *expression)
1473 {
1474         switch(expression->type) {
1475         case EXPR_REFERENCE:
1476                 return reference_addr((const reference_expression_t*) expression);
1477         case EXPR_ARRAY_ACCESS:
1478                 return array_access_addr((const array_access_expression_t*) expression);
1479         case EXPR_SELECT:
1480                 return select_addr((const select_expression_t*) expression);
1481         case EXPR_UNARY: {
1482                 const unary_expression_t *const unary_expr =
1483                         (const unary_expression_t*)expression;
1484                 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1485                         return dereference_addr(unary_expr);
1486                 }
1487                 break;
1488         }
1489         default:
1490                 break;
1491         }
1492         panic("trying to get address of non-lvalue");
1493 }
1494
1495 static ir_node *_expression_to_firm(const expression_t *expression)
1496 {
1497         switch(expression->type) {
1498         case EXPR_CONST:
1499                 return const_to_firm((const const_t*) expression);
1500         case EXPR_STRING_LITERAL:
1501                 return string_literal_to_firm((const string_literal_t*) expression);
1502         case EXPR_REFERENCE:
1503                 return reference_expression_to_firm(
1504                                 (const reference_expression_t*) expression);
1505         case EXPR_CALL:
1506                 return call_expression_to_firm((const call_expression_t*) expression);
1507         case EXPR_UNARY:
1508                 return unary_expression_to_firm((const unary_expression_t*) expression);
1509         case EXPR_BINARY:
1510                 return binary_expression_to_firm(
1511                                 (const binary_expression_t*) expression);
1512         case EXPR_ARRAY_ACCESS:
1513                 return array_access_to_firm(
1514                                 (const array_access_expression_t*) expression);
1515         case EXPR_SIZEOF:
1516                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1517         case EXPR_CONDITIONAL:
1518                 return conditional_to_firm((const conditional_expression_t*)expression);
1519         case EXPR_SELECT:
1520                 return select_to_firm((const select_expression_t*) expression);
1521         case EXPR_CLASSIFY_TYPE:
1522                 return classify_type_to_firm((const classify_type_expression_t*)expression);
1523         case EXPR_FUNCTION:
1524         case EXPR_PRETTY_FUNCTION:
1525                 return function_name_to_firm((const string_literal_t*)expression);
1526         case EXPR_OFFSETOF:
1527         case EXPR_VA_ARG:
1528         case EXPR_STATEMENT:
1529         case EXPR_BUILTIN_SYMBOL:
1530                 panic("unimplemented expression found");
1531
1532         case EXPR_UNKNOWN:
1533         case EXPR_INVALID:
1534                 break;
1535         }
1536         panic("invalid expression found");
1537 }
1538
1539 static ir_node *expression_to_firm(const expression_t *expression)
1540 {
1541         ir_node *res = _expression_to_firm(expression);
1542
1543         if(res != NULL && get_irn_mode(res) == mode_b) {
1544                 ir_mode *mode = get_ir_mode(expression->datatype);
1545                 res           = create_conv(NULL, res, mode);
1546         }
1547
1548         return res;
1549 }
1550
1551 static ir_node *expression_to_modeb(const expression_t *expression)
1552 {
1553         ir_node *res = _expression_to_firm(expression);
1554         res          = create_conv(NULL, res, mode_b);
1555
1556         return res;
1557 }
1558
1559 /**
1560  * create a short-circuit expression evaluation that tries to construct
1561  * efficient control flow structures for &&, || and ! expressions
1562  */
1563 static void create_condition_evaluation(const expression_t *expression,
1564                                         ir_node *true_block,
1565                                         ir_node *false_block)
1566 {
1567         switch(expression->type) {
1568         case EXPR_UNARY: {
1569                 unary_expression_t *unary_expression = (unary_expression_t*) expression;
1570                 if(unary_expression->type == UNEXPR_NOT) {
1571                         create_condition_evaluation(unary_expression->value, false_block,
1572                                                     true_block);
1573                         return;
1574                 }
1575                 break;
1576         }
1577         case EXPR_BINARY: {
1578                 binary_expression_t *binary_expression
1579                         = (binary_expression_t*) expression;
1580                 if(binary_expression->type == BINEXPR_LOGICAL_AND) {
1581                         ir_node *cur_block   = get_cur_block();
1582                         ir_node *extra_block = new_immBlock();
1583                         set_cur_block(cur_block);
1584                         create_condition_evaluation(binary_expression->left, extra_block,
1585                                                     false_block);
1586                         mature_immBlock(extra_block);
1587                         set_cur_block(extra_block);
1588                         create_condition_evaluation(binary_expression->right, true_block,
1589                                                     false_block);
1590                         return;
1591                 }
1592                 if(binary_expression->type == BINEXPR_LOGICAL_OR) {
1593                         ir_node *cur_block   = get_cur_block();
1594                         ir_node *extra_block = new_immBlock();
1595                         set_cur_block(cur_block);
1596                         create_condition_evaluation(binary_expression->left, true_block,
1597                                                     extra_block);
1598                         mature_immBlock(extra_block);
1599                         set_cur_block(extra_block);
1600                         create_condition_evaluation(binary_expression->right, true_block,
1601                                                     false_block);
1602                         return;
1603                 }
1604                 break;
1605         }
1606         default:
1607                 break;
1608         }
1609
1610         dbg_info *dbgi       = get_dbg_info(&expression->source_position);
1611         ir_node  *condition  = expression_to_modeb(expression);
1612         ir_node  *cond       = new_d_Cond(dbgi, condition);
1613         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1614         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1615
1616         add_immBlock_pred(true_block, true_proj);
1617         add_immBlock_pred(false_block, false_proj);
1618
1619         set_cur_block(NULL);
1620 }
1621
1622 static void statement_to_firm(statement_t *statement);
1623
1624 static void return_statement_to_firm(return_statement_t *statement)
1625 {
1626         if(get_cur_block() == NULL)
1627                 return;
1628
1629         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1630         ir_node  *ret;
1631
1632         if(statement->return_value != NULL) {
1633                 ir_node *retval = expression_to_firm(statement->return_value);
1634                 ir_node *in[1];
1635
1636                 in[0] = retval;
1637                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1638         } else {
1639                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1640         }
1641         ir_node *end_block = get_irg_end_block(current_ir_graph);
1642         add_immBlock_pred(end_block, ret);
1643
1644         set_cur_block(NULL);
1645 }
1646
1647 static void compound_statement_to_firm(compound_statement_t *compound)
1648 {
1649         statement_t *statement = compound->statements;
1650         for( ; statement != NULL; statement = statement->next) {
1651                 //context2firm(&statement->context);
1652                 statement_to_firm(statement);
1653         }
1654 }
1655
1656 static void expression_statement_to_firm(expression_statement_t *statement)
1657 {
1658         if(get_cur_block() == NULL)
1659                 return;
1660
1661         expression_to_firm(statement->expression);
1662 }
1663
1664 static void if_statement_to_firm(if_statement_t *statement)
1665 {
1666         ir_node *cur_block = get_cur_block();
1667
1668         ir_node *fallthrough_block = new_immBlock();
1669
1670         /* the true (blocks) */
1671         ir_node *true_block;
1672         if (statement->true_statement != NULL) {
1673                 true_block = new_immBlock();
1674                 statement_to_firm(statement->true_statement);
1675                 if(get_cur_block() != NULL) {
1676                         ir_node *jmp = new_Jmp();
1677                         add_immBlock_pred(fallthrough_block, jmp);
1678                 }
1679         } else {
1680                 true_block = fallthrough_block;
1681         }
1682
1683         /* the false (blocks) */
1684         ir_node *false_block;
1685         if(statement->false_statement != NULL) {
1686                 false_block = new_immBlock();
1687
1688                 statement_to_firm(statement->false_statement);
1689                 if(get_cur_block() != NULL) {
1690                         ir_node *jmp = new_Jmp();
1691                         add_immBlock_pred(fallthrough_block, jmp);
1692                 }
1693         } else {
1694                 false_block = fallthrough_block;
1695         }
1696
1697         /* create the condition */
1698         if(cur_block != NULL) {
1699                 set_cur_block(cur_block);
1700                 create_condition_evaluation(statement->condition, true_block,
1701                                             false_block);
1702         }
1703
1704         mature_immBlock(true_block);
1705         if(false_block != fallthrough_block) {
1706                 mature_immBlock(false_block);
1707         }
1708         mature_immBlock(fallthrough_block);
1709
1710         set_cur_block(fallthrough_block);
1711 }
1712
1713 static void while_statement_to_firm(while_statement_t *statement)
1714 {
1715         ir_node *jmp = NULL;
1716         if(get_cur_block() != NULL) {
1717                 jmp = new_Jmp();
1718         }
1719
1720         /* create the header block */
1721         ir_node *header_block = new_immBlock();
1722         if(jmp != NULL) {
1723                 add_immBlock_pred(header_block, jmp);
1724         }
1725
1726         /* the false block */
1727         ir_node *false_block = new_immBlock();
1728
1729         /* the loop body */
1730         ir_node *body_block;
1731         if (statement->body != NULL) {
1732                 ir_node *old_continue_label = continue_label;
1733                 ir_node *old_break_label    = break_label;
1734                 continue_label              = header_block;
1735                 break_label                 = false_block;
1736
1737                 body_block = new_immBlock();
1738                 statement_to_firm(statement->body);
1739
1740                 assert(continue_label == header_block);
1741                 assert(break_label    == false_block);
1742                 continue_label = old_continue_label;
1743                 break_label    = old_break_label;
1744
1745                 if(get_cur_block() != NULL) {
1746                         ir_node *jmp = new_Jmp();
1747                         add_immBlock_pred(header_block, jmp);
1748                 }
1749         } else {
1750                 body_block = header_block;
1751         }
1752
1753         /* create the condition */
1754         set_cur_block(header_block);
1755
1756         create_condition_evaluation(statement->condition, body_block, false_block);
1757         mature_immBlock(body_block);
1758         mature_immBlock(false_block);
1759         mature_immBlock(header_block);
1760
1761         set_cur_block(false_block);
1762 }
1763
1764 static void do_while_statement_to_firm(do_while_statement_t *statement)
1765 {
1766         ir_node *jmp = NULL;
1767         if(get_cur_block() != NULL) {
1768                 jmp = new_Jmp();
1769         }
1770
1771         /* create the header block */
1772         ir_node *header_block = new_immBlock();
1773
1774         /* the false block */
1775         ir_node *false_block = new_immBlock();
1776
1777         /* the loop body */
1778         ir_node *body_block = new_immBlock();
1779         if(jmp != NULL) {
1780                 add_immBlock_pred(body_block, jmp);
1781         }
1782
1783         if (statement->body != NULL) {
1784                 ir_node *old_continue_label = continue_label;
1785                 ir_node *old_break_label    = break_label;
1786                 continue_label              = header_block;
1787                 break_label                 = false_block;
1788
1789                 statement_to_firm(statement->body);
1790
1791                 assert(continue_label == header_block);
1792                 assert(break_label    == false_block);
1793                 continue_label = old_continue_label;
1794                 break_label    = old_break_label;
1795
1796                 if (get_cur_block() == NULL) {
1797                         mature_immBlock(header_block);
1798                         mature_immBlock(body_block);
1799                         mature_immBlock(false_block);
1800                         return;
1801                 }
1802         }
1803
1804         ir_node *body_jmp = new_Jmp();
1805         add_immBlock_pred(header_block, body_jmp);
1806         mature_immBlock(header_block);
1807
1808         /* create the condition */
1809         set_cur_block(header_block);
1810
1811         create_condition_evaluation(statement->condition, body_block, false_block);
1812         mature_immBlock(body_block);
1813         mature_immBlock(false_block);
1814         mature_immBlock(header_block);
1815
1816         set_cur_block(false_block);
1817 }
1818
1819 static void for_statement_to_firm(for_statement_t *statement)
1820 {
1821         ir_node *jmp = NULL;
1822         if (get_cur_block() != NULL) {
1823                 if(statement->initialisation != NULL) {
1824                         expression_to_firm(statement->initialisation);
1825                 }
1826                 jmp = new_Jmp();
1827         }
1828
1829         /* create the step block */
1830         ir_node *const step_block = new_immBlock();
1831         if (statement->step != NULL) {
1832                 expression_to_firm(statement->step);
1833         }
1834         ir_node *const step_jmp = new_Jmp();
1835
1836         /* create the header block */
1837         ir_node *const header_block = new_immBlock();
1838         if (jmp != NULL) {
1839                 add_immBlock_pred(header_block, jmp);
1840         }
1841         add_immBlock_pred(header_block, step_jmp);
1842
1843         /* the false block */
1844         ir_node *const false_block = new_immBlock();
1845
1846         /* the loop body */
1847         ir_node * body_block;
1848         if (statement->body != NULL) {
1849                 ir_node *const old_continue_label = continue_label;
1850                 ir_node *const old_break_label    = break_label;
1851                 continue_label = step_block;
1852                 break_label    = false_block;
1853
1854                 body_block = new_immBlock();
1855                 statement_to_firm(statement->body);
1856
1857                 assert(continue_label == step_block);
1858                 assert(break_label    == false_block);
1859                 continue_label = old_continue_label;
1860                 break_label    = old_break_label;
1861
1862                 if (get_cur_block() != NULL) {
1863                         ir_node *const jmp = new_Jmp();
1864                         add_immBlock_pred(step_block, jmp);
1865                 }
1866         } else {
1867                 body_block = step_block;
1868         }
1869
1870         /* create the condition */
1871         set_cur_block(header_block);
1872         if (statement->condition != NULL) {
1873                 create_condition_evaluation(statement->condition, body_block,
1874                                             false_block);
1875         } else {
1876                 keep_alive(header_block);
1877                 ir_node *jmp = new_Jmp();
1878                 add_immBlock_pred(body_block, jmp);
1879         }
1880
1881         mature_immBlock(body_block);
1882         mature_immBlock(false_block);
1883         mature_immBlock(step_block);
1884         mature_immBlock(header_block);
1885         mature_immBlock(false_block);
1886
1887         set_cur_block(false_block);
1888 }
1889
1890 static void create_declaration_entity(declaration_t *declaration,
1891                                       declaration_type_t declaration_type,
1892                                       ir_type *parent_type)
1893 {
1894         ident     *id     = new_id_from_str(declaration->symbol->string);
1895         ir_type   *irtype = get_ir_type(declaration->type);
1896         ir_entity *entity = new_entity(parent_type, id, irtype);
1897         set_entity_ld_ident(entity, id);
1898
1899         declaration->declaration_type = declaration_type;
1900         declaration->v.entity         = entity;
1901         set_entity_variability(entity, variability_uninitialized);
1902         /* TODO: visibility? */
1903 }
1904
1905 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
1906
1907 enum compound_graph_entry_type_t {
1908         COMPOUND_GRAPH_ENTRY_ARRAY,
1909         COMPOUND_GRAPH_ENTRY_COMPOUND
1910 };
1911
1912 struct compound_graph_path_entry_t {
1913         int type;
1914         union {
1915                 ir_entity *entity;
1916                 int        array_index;
1917         } v;
1918         compound_graph_path_entry_t *prev;
1919 };
1920
1921 static void create_initializer_list(initializer_list_t *initializer,
1922                                     type_t *type, ir_entity *entity,
1923                                     compound_graph_path_entry_t *entry,
1924                                     int len);
1925
1926 static void create_initializer_value(initializer_value_t *initializer,
1927                                      ir_entity *entity,
1928                                      compound_graph_path_entry_t *entry,
1929                                      int len)
1930 {
1931         ir_node *node = expression_to_firm(initializer->value);
1932
1933         ir_type *type = get_entity_type(entity);
1934         compound_graph_path *path = new_compound_graph_path(type, len);
1935
1936         int i = len - 1;
1937         for( ; entry != NULL; entry = entry->prev, --i) {
1938                 assert(i >= 0);
1939                 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
1940                         set_compound_graph_path_node(path, i, entry->v.entity);
1941                 } else {
1942                         assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
1943                         set_compound_graph_path_array_index(path, i, entry->v.array_index);
1944                 }
1945         }
1946         assert(i == -1);
1947
1948         add_compound_ent_value_w_path(entity, node, path);
1949 }
1950
1951 static void create_initializer_compound(initializer_list_t *initializer,
1952                                         compound_type_t *type,
1953                                         ir_entity *entity,
1954                                         compound_graph_path_entry_t *last_entry,
1955                                         int len)
1956 {
1957         declaration_t *compound_declaration = type->declaration;
1958
1959         declaration_t *compound_entry = compound_declaration->context.declarations;
1960
1961         compound_graph_path_entry_t entry;
1962         entry.type     = COMPOUND_GRAPH_ENTRY_COMPOUND;
1963         entry.prev     = last_entry;
1964         ++len;
1965
1966         size_t i = 0;
1967         for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
1968                 if(compound_entry->symbol == NULL)
1969                         continue;
1970                 if(compound_entry->namespc != NAMESPACE_NORMAL)
1971                         continue;
1972
1973                 if(i >= initializer->len)
1974                         break;
1975
1976                 entry.v.entity = compound_entry->v.entity;
1977
1978                 initializer_t *sub_initializer = initializer->initializers[i];
1979
1980                 assert(compound_entry != NULL);
1981                 assert(compound_entry->declaration_type
1982                                 == DECLARATION_TYPE_COMPOUND_MEMBER);
1983
1984                 if(sub_initializer->type == INITIALIZER_VALUE) {
1985                         create_initializer_value((initializer_value_t*) sub_initializer,
1986                                                  entity, &entry, len);
1987                 } else {
1988                         assert(sub_initializer->type == INITIALIZER_LIST);
1989                         create_initializer_list((initializer_list_t*) sub_initializer,
1990                                                 compound_entry->type, entity, &entry, len);
1991                 }
1992
1993                 ++i;
1994         }
1995 }
1996
1997 static void create_initializer_list(initializer_list_t *initializer,
1998                                     type_t *type, ir_entity *entity,
1999                                     compound_graph_path_entry_t *entry, int len)
2000 {
2001         if(type->type == TYPE_ARRAY) {
2002                 /* TODO */
2003         } else {
2004                 assert(type->type == TYPE_COMPOUND_STRUCT
2005                                 || type->type == TYPE_COMPOUND_UNION);
2006                 create_initializer_compound(initializer, (compound_type_t*) type,
2007                                             entity, entry, len);
2008         }
2009 }
2010
2011 static void create_initializer(declaration_t *declaration)
2012 {
2013         initializer_t *initializer = declaration->init.initializer;
2014         if(initializer == NULL)
2015                 return;
2016
2017         if(initializer->type == INITIALIZER_VALUE) {
2018                 initializer_value_t *initializer_value
2019                         = (initializer_value_t*) initializer;
2020                 ir_node *value = expression_to_firm(initializer_value->value);
2021
2022                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
2023                         set_value(declaration->v.value_number, value);
2024                 } else {
2025                         ir_entity *entity = declaration->v.entity;
2026
2027                         set_entity_variability(entity, variability_initialized);
2028                         set_atomic_ent_value(entity, value);
2029                 }
2030         } else {
2031                 assert(initializer->type == INITIALIZER_LIST);
2032                 initializer_list_t *list = (initializer_list_t*) initializer;
2033
2034                 declaration_type_t declaration_type = declaration->declaration_type;
2035                 assert(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY
2036                                 || declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2037
2038                 ir_entity *entity = declaration->v.entity;
2039                 set_entity_variability(entity, variability_initialized);
2040
2041                 create_initializer_list(list, declaration->type, entity, NULL, 0);
2042         }
2043 }
2044
2045 static void create_local_variable(declaration_t *declaration)
2046 {
2047         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2048
2049         bool needs_entity = declaration->address_taken;
2050         type_t *type = skip_typeref(declaration->type);
2051
2052         if(type->type == TYPE_ARRAY
2053                         || type->type == TYPE_COMPOUND_STRUCT
2054                         || type->type == TYPE_COMPOUND_UNION) {
2055                 needs_entity = true;
2056         }
2057
2058         if(needs_entity) {
2059                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2060                 create_declaration_entity(declaration,
2061                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
2062                                           frame_type);
2063         } else {
2064                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2065                 declaration->v.value_number   = next_value_number_function;
2066                 ++next_value_number_function;
2067         }
2068
2069         create_initializer(declaration);
2070 }
2071
2072 static void declaration_statement_to_firm(declaration_statement_t *statement)
2073 {
2074         declaration_t *declaration = statement->declarations_begin;
2075         declaration_t *end         = statement->declarations_end->next;
2076         for( ; declaration != end; declaration = declaration->next) {
2077                 type_t *type = declaration->type;
2078
2079                 switch(declaration->storage_class) {
2080                 case STORAGE_CLASS_TYPEDEF:
2081                         continue;
2082                 case STORAGE_CLASS_STATIC:
2083                         panic("static local vars not implemented yet");
2084                 case STORAGE_CLASS_ENUM_ENTRY:
2085                         panic("enum entry declaration in local block found");
2086                 case STORAGE_CLASS_EXTERN:
2087                         panic("extern declaration in local block found");
2088                 case STORAGE_CLASS_NONE:
2089                 case STORAGE_CLASS_AUTO:
2090                 case STORAGE_CLASS_REGISTER:
2091                         if(type->type == TYPE_FUNCTION) {
2092                                 panic("nested functions not supported yet");
2093                         } else {
2094                                 create_local_variable(declaration);
2095                         }
2096                         continue;
2097                 }
2098                 panic("invalid storage class found");
2099         }
2100 }
2101
2102 static void create_jump_statement(const statement_t *statement,
2103                                   ir_node *target_block)
2104 {
2105         if(get_cur_block() == NULL)
2106                 return;
2107
2108         dbg_info *dbgi = get_dbg_info(&statement->source_position);
2109         ir_node  *jump = new_d_Jmp(dbgi);
2110         add_immBlock_pred(target_block, jump);
2111
2112         set_cur_block(NULL);
2113 }
2114
2115 static void switch_statement_to_firm(const switch_statement_t *statement)
2116 {
2117         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2118
2119         ir_node *expression  = expression_to_firm(statement->expression);
2120         ir_node *cond        = new_d_Cond(dbgi, expression);
2121         ir_node *break_block = new_immBlock();
2122
2123         set_cur_block(NULL);
2124
2125         ir_node *const old_switch_cond       = current_switch_cond;
2126         ir_node *const old_break_label       = break_label;
2127         const bool     old_saw_default_label = saw_default_label;
2128         current_switch_cond                  = cond;
2129         break_label                          = break_block;
2130
2131         statement_to_firm(statement->body);
2132
2133         if(get_cur_block() != NULL) {
2134                 ir_node *jmp = new_Jmp();
2135                 add_immBlock_pred(break_block, jmp);
2136         }
2137
2138         if (!saw_default_label) {
2139                 set_cur_block(get_nodes_block(cond));
2140                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
2141                                                         MAGIC_DEFAULT_PN_NUMBER);
2142                 add_immBlock_pred(break_block, proj);
2143         }
2144
2145         assert(current_switch_cond == cond);
2146         assert(break_label         == break_block);
2147         current_switch_cond = old_switch_cond;
2148         break_label         = old_break_label;
2149         saw_default_label   = old_saw_default_label;
2150
2151         mature_immBlock(break_block);
2152         set_cur_block(break_block);
2153 }
2154
2155 static long fold_constant(const expression_t *expression)
2156 {
2157         ir_graph *old_current_ir_graph = current_ir_graph;
2158         current_ir_graph = get_const_code_irg();
2159
2160         ir_node *cnst = expression_to_firm(expression);
2161         if(!is_Const(cnst)) {
2162                 panic("couldn't fold constantl");
2163         }
2164         tarval *tv = get_Const_tarval(cnst);
2165         if(!tarval_is_long(tv)) {
2166                 panic("folded constant not an integer");
2167         }
2168
2169         long res = get_tarval_long(tv);
2170
2171         current_ir_graph = old_current_ir_graph;
2172         return res;
2173 }
2174
2175 static void case_label_to_firm(const case_label_statement_t *statement)
2176 {
2177         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2178
2179         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
2180
2181         /* let's create a node and hope firm constant folding creates a Const
2182          * node... */
2183         ir_node *proj;
2184         set_cur_block(get_nodes_block(current_switch_cond));
2185         if(statement->expression) {
2186                 long pn = fold_constant(statement->expression);
2187                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
2188                         /* oops someone detected our cheating... */
2189                         panic("magic default pn used");
2190                 }
2191                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
2192         } else {
2193                 saw_default_label = true;
2194                 proj = new_d_defaultProj(dbgi, current_switch_cond,
2195                                          MAGIC_DEFAULT_PN_NUMBER);
2196         }
2197
2198         ir_node *block = new_immBlock();
2199         if (fallthrough != NULL) {
2200                 add_immBlock_pred(block, fallthrough);
2201         }
2202         add_immBlock_pred(block, proj);
2203         mature_immBlock(block);
2204 }
2205
2206 static ir_node *get_label_block(declaration_t *label)
2207 {
2208         assert(label->namespc == NAMESPACE_LABEL);
2209
2210         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
2211                 return label->v.block;
2212         }
2213         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
2214
2215         ir_node *old_cur_block = get_cur_block();
2216         ir_node *block         = new_immBlock();
2217         set_cur_block(old_cur_block);
2218
2219         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
2220         label->v.block          = block;
2221
2222         ARR_APP1(ir_node *, imature_blocks, block);
2223
2224         return block;
2225 }
2226
2227 static void label_to_firm(const label_statement_t *statement)
2228 {
2229         ir_node *block = get_label_block(statement->label);
2230
2231         if(get_cur_block() != NULL) {
2232                 ir_node *jmp = new_Jmp();
2233                 add_immBlock_pred(block, jmp);
2234         }
2235
2236         set_cur_block(block);
2237         keep_alive(block);
2238
2239         statement_to_firm(statement->label_statement);
2240 }
2241
2242 static void goto_to_firm(const goto_statement_t *statement)
2243 {
2244         if(get_cur_block() == NULL)
2245                 return;
2246
2247         ir_node *block = get_label_block(statement->label);
2248         ir_node *jmp   = new_Jmp();
2249         add_immBlock_pred(block, jmp);
2250
2251         set_cur_block(NULL);
2252 }
2253
2254 static void statement_to_firm(statement_t *statement)
2255 {
2256         switch(statement->type) {
2257         case STATEMENT_COMPOUND:
2258                 compound_statement_to_firm((compound_statement_t*) statement);
2259                 return;
2260         case STATEMENT_RETURN:
2261                 return_statement_to_firm((return_statement_t*) statement);
2262                 return;
2263         case STATEMENT_EXPRESSION:
2264                 expression_statement_to_firm((expression_statement_t*) statement);
2265                 return;
2266         case STATEMENT_IF:
2267                 if_statement_to_firm((if_statement_t*) statement);
2268                 return;
2269         case STATEMENT_WHILE:
2270                 while_statement_to_firm((while_statement_t*) statement);
2271                 return;
2272         case STATEMENT_DO_WHILE:
2273                 do_while_statement_to_firm((do_while_statement_t*) statement);
2274                 return;
2275         case STATEMENT_DECLARATION:
2276                 declaration_statement_to_firm((declaration_statement_t*) statement);
2277                 return;
2278         case STATEMENT_BREAK:
2279                 create_jump_statement(statement, break_label);
2280                 return;
2281         case STATEMENT_CONTINUE:
2282                 create_jump_statement(statement, continue_label);
2283                 return;
2284         case STATEMENT_SWITCH:
2285                 switch_statement_to_firm((switch_statement_t*) statement);
2286                 return;
2287         case STATEMENT_CASE_LABEL:
2288                 case_label_to_firm((case_label_statement_t*) statement);
2289                 return;
2290         case STATEMENT_FOR:
2291                 for_statement_to_firm((for_statement_t*) statement);
2292                 return;
2293         case STATEMENT_LABEL:
2294                 label_to_firm((label_statement_t*) statement);
2295                 return;
2296         case STATEMENT_GOTO:
2297                 goto_to_firm((goto_statement_t*) statement);
2298                 return;
2299         default:
2300                 break;
2301         }
2302         panic("Statement not implemented\n");
2303 }
2304
2305 static int count_local_declarations(const declaration_t *      decl,
2306                                     const declaration_t *const end)
2307 {
2308         int count = 0;
2309         for (; decl != end; decl = decl->next) {
2310                 const type_t *type = skip_typeref(decl->type);
2311                 switch (type->type) {
2312                         case TYPE_ATOMIC:
2313                         case TYPE_ENUM:
2314                         case TYPE_POINTER:
2315                                 if (!decl->address_taken) ++count;
2316                                 break;
2317
2318                         default: break;
2319                 }
2320         }
2321         return count;
2322 }
2323
2324 static int count_decls_in_stmts(const statement_t *stmt)
2325 {
2326         int count = 0;
2327         for (; stmt != NULL; stmt = stmt->next) {
2328                 switch (stmt->type) {
2329                         case STATEMENT_DECLARATION: {
2330                                 const declaration_statement_t *const decl_stmt =
2331                                         (const declaration_statement_t*)stmt;
2332                                 count += count_local_declarations(decl_stmt->declarations_begin,
2333                                                                   decl_stmt->declarations_end->next);
2334                                 break;
2335                         }
2336
2337                         case STATEMENT_COMPOUND: {
2338                                 const compound_statement_t *const comp =
2339                                         (const compound_statement_t*)stmt;
2340                                 count += count_decls_in_stmts(comp->statements);
2341                                 break;
2342                         }
2343
2344                         case STATEMENT_IF: {
2345                                 const if_statement_t *const if_stmt = (const if_statement_t*)stmt;
2346                                 count += count_decls_in_stmts(if_stmt->true_statement);
2347                                 count += count_decls_in_stmts(if_stmt->false_statement);
2348                                 break;
2349                         }
2350
2351                         case STATEMENT_SWITCH: {
2352                                 const switch_statement_t *const switch_stmt =
2353                                         (const switch_statement_t*)stmt;
2354                                 count += count_decls_in_stmts(switch_stmt->body);
2355                                 break;
2356                         }
2357
2358                         case STATEMENT_LABEL: {
2359                                 const label_statement_t *const label_stmt =
2360                                         (const label_statement_t*)stmt;
2361                                 count += count_decls_in_stmts(label_stmt->label_statement);
2362                                 break;
2363                         }
2364
2365                         case STATEMENT_WHILE: {
2366                                 const while_statement_t *const while_stmt =
2367                                         (const while_statement_t*)stmt;
2368                                 count += count_decls_in_stmts(while_stmt->body);
2369                                 break;
2370                         }
2371
2372                         case STATEMENT_DO_WHILE: {
2373                                 const do_while_statement_t *const do_while_stmt =
2374                                         (const do_while_statement_t*)stmt;
2375                                 count += count_decls_in_stmts(do_while_stmt->body);
2376                                 break;
2377                         }
2378
2379                         case STATEMENT_FOR: {
2380                                 const for_statement_t *const for_stmt =
2381                                         (const for_statement_t*)stmt;
2382                                 /* TODO initialisation */
2383                                 count += count_decls_in_stmts(for_stmt->body);
2384                                 break;
2385                         }
2386
2387                         case STATEMENT_BREAK:
2388                         case STATEMENT_CASE_LABEL:
2389                         case STATEMENT_CONTINUE:
2390                         case STATEMENT_EXPRESSION:
2391                         case STATEMENT_GOTO:
2392                         case STATEMENT_INVALID:
2393                         case STATEMENT_RETURN:
2394                                 break;
2395                 }
2396         }
2397         return count;
2398 }
2399
2400 static int get_function_n_local_vars(declaration_t *declaration)
2401 {
2402         int count = 0;
2403
2404         /* count parameters */
2405         count += count_local_declarations(declaration->context.declarations, NULL);
2406
2407         /* count local variables declared in body */
2408         count += count_decls_in_stmts(declaration->init.statement);
2409
2410         return count;
2411 }
2412
2413 static void initialize_function_parameters(declaration_t *declaration)
2414 {
2415         ir_graph *irg         = current_ir_graph;
2416         ir_node  *args        = get_irg_args(irg);
2417         ir_node  *start_block = get_irg_start_block(irg);
2418
2419         int            n         = 0;
2420         declaration_t *parameter = declaration->context.declarations;
2421         for( ; parameter != NULL; parameter = parameter->next) {
2422                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
2423                 type_t *type = parameter->type;
2424
2425                 bool needs_entity = parameter->address_taken;
2426                 if(type->type == TYPE_COMPOUND_STRUCT
2427                                 || type->type == TYPE_COMPOUND_UNION) {
2428                         needs_entity = true;
2429                 }
2430
2431                 if(needs_entity) {
2432                         panic("entities for function parameters not implemented yet");
2433                 }
2434
2435                 ir_mode *mode = get_ir_mode(parameter->type);
2436                 long     pn   = n;
2437                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2438                 ++n;
2439
2440                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2441                 parameter->v.value_number   = next_value_number_function;
2442                 ++next_value_number_function;
2443
2444                 set_value(parameter->v.value_number, proj);
2445         }
2446 }
2447
2448 static void create_function(declaration_t *declaration)
2449 {
2450         ir_entity *entity = get_function_entity(declaration);
2451
2452         if(declaration->init.statement == NULL)
2453                 return;
2454
2455         current_function_decl = declaration;
2456         current_function_name = NULL;
2457
2458         assert(imature_blocks == NULL);
2459         imature_blocks = NEW_ARR_F(ir_node*, 0);
2460
2461         int       n_local_vars = get_function_n_local_vars(declaration);
2462         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
2463         ir_node  *first_block  = get_cur_block();
2464
2465         next_value_number_function = 0;
2466         initialize_function_parameters(declaration);
2467
2468         statement_to_firm(declaration->init.statement);
2469
2470         ir_node *end_block = get_irg_end_block(irg);
2471
2472         /* do we have a return statement yet? */
2473         if(get_cur_block() != NULL) {
2474                 assert(declaration->type->type == TYPE_FUNCTION);
2475                 const function_type_t* const func_type
2476                         = (const function_type_t*) declaration->type;
2477                 ir_node *ret;
2478                 if (func_type->result_type == type_void) {
2479                         ret = new_Return(get_store(), 0, NULL);
2480                 } else {
2481                         ir_mode *const mode = get_ir_mode(func_type->result_type);
2482                         ir_node *      in[1];
2483                         // §5.1.2.2.3 main implicitly returns 0
2484                         if (strcmp(declaration->symbol->string, "main") == 0) {
2485                                 in[0] = new_Const(mode, get_mode_null(mode));
2486                         } else {
2487                                 in[0] = new_Unknown(mode);
2488                         }
2489                         ret = new_Return(get_store(), 1, in);
2490                 }
2491                 add_immBlock_pred(end_block, ret);
2492         }
2493
2494         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2495                 mature_immBlock(imature_blocks[i]);
2496         }
2497         DEL_ARR_F(imature_blocks);
2498         imature_blocks = NULL;
2499
2500         mature_immBlock(first_block);
2501         mature_immBlock(end_block);
2502
2503         irg_finalize_cons(irg);
2504
2505         /* finalize the frame type */
2506         ir_type *frame_type = get_irg_frame_type(irg);
2507         int      n          = get_compound_n_members(frame_type);
2508         int      align_all  = 4;
2509         int      offset     = 0;
2510         for(int i = 0; i < n; ++i) {
2511                 ir_entity *entity      = get_compound_member(frame_type, i);
2512                 ir_type   *entity_type = get_entity_type(entity);
2513
2514                 int align = get_type_alignment_bytes(entity_type);
2515                 if(align > align_all)
2516                         align_all = align;
2517                 int misalign = 0;
2518                 if(align > 0) {
2519                         misalign  = offset % align;
2520                         if(misalign > 0) {
2521                                 offset += align - misalign;
2522                         }
2523                 }
2524
2525                 set_entity_offset(entity, offset);
2526                 offset += get_type_size_bytes(entity_type);
2527         }
2528         set_type_size_bytes(frame_type, offset);
2529         set_type_alignment_bytes(frame_type, align_all);
2530         set_type_state(frame_type, layout_fixed);
2531
2532         irg_vrfy(irg);
2533 }
2534
2535 static void create_global_variable(declaration_t *declaration)
2536 {
2537         ir_type   *global_type = get_glob_type();
2538         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
2539                                   global_type);
2540
2541         ir_entity *entity = declaration->v.entity;
2542         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
2543                 set_entity_visibility(entity, visibility_local);
2544         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
2545                 set_entity_visibility(entity, visibility_external_allocated);
2546         } else {
2547                 set_entity_visibility(entity, visibility_external_visible);
2548         }
2549         current_ir_graph = get_const_code_irg();
2550         create_initializer(declaration);
2551 }
2552
2553 static void context_to_firm(context_t *context)
2554 {
2555         declaration_t *declaration = context->declarations;
2556         for( ; declaration != NULL; declaration = declaration->next) {
2557                 if(declaration->namespc != NAMESPACE_NORMAL)
2558                         continue;
2559                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2560                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2561                         continue;
2562                 if(declaration->symbol == NULL)
2563                         continue;
2564
2565                 type_t *type = declaration->type;
2566                 if(type->type == TYPE_FUNCTION) {
2567                         create_function(declaration);
2568                 } else {
2569                         create_global_variable(declaration);
2570                 }
2571         }
2572 }
2573
2574 void translation_unit_to_firm(translation_unit_t *unit)
2575 {
2576         /* just to be sure */
2577         continue_label      = NULL;
2578         break_label         = NULL;
2579         current_switch_cond = NULL;
2580
2581         context_to_firm(& unit->context);
2582 }