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         char    buf[128];
 559         tarval *tv;
 560         size_t  len;
 561         if(mode_is_float(mode)) {
 562                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 563         } else {
 564                 if(mode_is_signed(mode)) {
 565                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
 566                 } else {
 567                         len = snprintf(buf, sizeof(buf), "%llu", cnst->v.int_value);
 568                 }
 569                 tv = new_tarval_from_str(buf, len, mode);
 570         }
 571
 572         return new_d_Const(dbgi, mode, tv);
 573 }
 574
 575 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 576 {
 577         assert(entity != NULL);
 578         union symconst_symbol sym;
 579         sym.entity_p = entity;
 580         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 581 }
 582
 583 static ir_node *string_to_firm(const source_position_t *const src_pos,
 584                                const char *const id_prefix,
 585                                const char *const string)
 586 {
 587         ir_type *const global_type = get_glob_type();
 588         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 589                                                     ir_type_const_char);
 590
 591         ident     *const id     = unique_ident(id_prefix);
 592         ir_entity *const entity = new_entity(global_type, id, type);
 593         set_entity_ld_ident(entity, id);
 594         set_entity_variability(entity, variability_constant);
 595
 596         ir_type *const elem_type = ir_type_const_char;
 597         ir_mode *const mode      = get_type_mode(elem_type);
 598
 599         const size_t slen = strlen(string) + 1;
 600
 601         set_array_lower_bound_int(type, 0, 0);
 602         set_array_upper_bound_int(type, 0, slen);
 603         set_type_size_bytes(type, slen);
 604         set_type_state(type, layout_fixed);
 605
 606         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 607         for(size_t i = 0; i < slen; ++i) {
 608                 tvs[i] = new_tarval_from_long(string[i], mode);
 609         }
 610
 611         set_array_entity_values(entity, tvs, slen);
 612         free(tvs);
 613
 614         dbg_info *const dbgi = get_dbg_info(src_pos);
 615
 616         return create_symconst(dbgi, entity);
 617 }
 618
 619 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 620 {
 621         return string_to_firm(&literal->expression.source_position, "Lstr",
 622                               literal->value);
 623 }
 624
 625 static ir_node *deref_address(type_t *const type, ir_node *const addr,
 626                               dbg_info *const dbgi)
 627 {
 628         switch (type->type) {
 629                 case TYPE_ARRAY:
 630                 case TYPE_COMPOUND_STRUCT:
 631                 case TYPE_COMPOUND_UNION:
 632                         return addr;
 633
 634                 default: {
 635                         ir_mode *const mode     = get_ir_mode(type);
 636                         ir_node *const memory   = get_store();
 637                         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
 638                         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 639                         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
 640                         set_store(load_mem);
 641                         return load_res;
 642                 }
 643         }
 644 }
 645
 646 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 647 {
 648         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 649         declaration_t *declaration = ref->declaration;
 650         type_t        *type        = skip_typeref(declaration->type);
 651
 652         switch((declaration_type_t) declaration->declaration_type) {
 653         case DECLARATION_TYPE_UNKNOWN:
 654                 break;
 655         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 656                 ir_mode *mode = get_ir_mode(type);
 657                 return get_value(declaration->v.value_number, mode);
 658         }
 659         case DECLARATION_TYPE_FUNCTION: {
 660                 return create_symconst(dbgi, declaration->v.entity);
 661         }
 662         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 663                 ir_entity *entity   = declaration->v.entity;
 664                 ir_node   *symconst = create_symconst(dbgi, entity);
 665                 return deref_address(type, symconst, dbgi);
 666         }
 667         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 668                 ir_entity *entity = declaration->v.entity;
 669                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 670                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 671                 return deref_address(type, sel, dbgi);
 672         }
 673
 674         case DECLARATION_TYPE_COMPOUND_MEMBER:
 675         case DECLARATION_TYPE_LABEL_BLOCK:
 676                 panic("not implemented reference type");
 677         }
 678
 679         panic("reference to declaration with unknown type found");
 680 }
 681
 682 static ir_node *reference_addr(const reference_expression_t *ref)
 683 {
 684         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 685         declaration_t *declaration = ref->declaration;
 686
 687         switch((declaration_type_t) declaration->declaration_type) {
 688         case DECLARATION_TYPE_UNKNOWN:
 689                 break;
 690         case DECLARATION_TYPE_LOCAL_VARIABLE:
 691                 panic("local variable without entity has no address");
 692         case DECLARATION_TYPE_FUNCTION: {
 693                 return create_symconst(dbgi, declaration->v.entity);
 694         }
 695         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 696                 ir_entity *entity   = declaration->v.entity;
 697                 ir_node   *symconst = create_symconst(dbgi, entity);
 698                 return symconst;
 699         }
 700         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 701                 ir_entity *entity = declaration->v.entity;
 702                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 703                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 704
 705                 return sel;
 706         }
 707         case DECLARATION_TYPE_COMPOUND_MEMBER:
 708         case DECLARATION_TYPE_LABEL_BLOCK:
 709                 panic("not implemented reference type");
 710         }
 711
 712         panic("reference to declaration with unknown type found");
 713 }
 714
 715 static ir_node *call_expression_to_firm(const call_expression_t *call)
 716 {
 717         assert(get_cur_block() != NULL);
 718
 719         expression_t  *function = call->function;
 720         ir_node       *callee   = expression_to_firm(function);
 721
 722         function_type_t *function_type;
 723         if (function->datatype->type == TYPE_POINTER) {
 724                 pointer_type_t *const ptr_type = (pointer_type_t*)function->datatype;
 725                 assert(ptr_type->points_to->type == TYPE_FUNCTION);
 726                 function_type = (function_type_t*)ptr_type->points_to;
 727         } else {
 728                 assert(function->datatype->type == TYPE_FUNCTION);
 729                 function_type = (function_type_t*)function->datatype;
 730         }
 731
 732         int              n_parameters = 0;
 733         call_argument_t *argument     = call->arguments;
 734         for( ; argument != NULL; argument = argument->next) {
 735                 ++n_parameters;
 736         }
 737
 738         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 739         ir_type *new_method_type = NULL;
 740         if(function_type->variadic || function_type->unspecified_parameters) {
 741                 /* we need to construct a new method type matching the call
 742                  * arguments... */
 743                 int n_res       = get_method_n_ress(ir_method_type);
 744                 new_method_type = new_type_method(unique_ident("calltype"),
 745                                                   n_parameters, n_res);
 746                 set_method_calling_convention(new_method_type,
 747                                get_method_calling_convention(ir_method_type));
 748                 set_method_additional_properties(new_method_type,
 749                                get_method_additional_properties(ir_method_type));
 750
 751                 for(int i = 0; i < n_res; ++i) {
 752                         set_method_res_type(new_method_type, i,
 753                                             get_method_res_type(ir_method_type, i));
 754                 }
 755         }
 756         ir_node *in[n_parameters];
 757
 758         argument = call->arguments;
 759         int n = 0;
 760         for( ; argument != NULL; argument = argument->next) {
 761                 expression_t *expression = argument->expression;
 762                 ir_node      *arg_node   = expression_to_firm(expression);
 763
 764                 in[n] = arg_node;
 765                 if(new_method_type != NULL) {
 766                         ir_type *irtype = get_ir_type(expression->datatype);
 767                         set_method_param_type(new_method_type, n, irtype);
 768                 }
 769
 770                 n++;
 771         }
 772         assert(n == n_parameters);
 773
 774         if(new_method_type != NULL)
 775                 ir_method_type = new_method_type;
 776
 777         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 778         ir_node  *store = get_store();
 779         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 780                                      ir_method_type);
 781         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 782         set_store(mem);
 783
 784         type_t  *result_type = function_type->result_type;
 785         ir_node *result      = NULL;
 786         if(result_type != type_void) {
 787                 ir_mode *mode    = get_ir_mode(result_type);
 788                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 789                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 790         }
 791
 792         return result;
 793 }
 794
 795 static ir_node *expression_to_addr(const expression_t *expression);
 796 static void create_condition_evaluation(const expression_t *expression,
 797                                         ir_node *true_block,
 798                                         ir_node *false_block);
 799
 800 static void set_value_for_expression(const expression_t *expression,
 801                                      ir_node *value)
 802 {
 803         if(expression->type == EXPR_REFERENCE) {
 804                 reference_expression_t *ref = (reference_expression_t*) expression;
 805
 806                 declaration_t *declaration = ref->declaration;
 807                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 808                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 809                         set_value(declaration->v.value_number, value);
 810                         return;
 811                 }
 812         }
 813
 814         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 815         ir_node  *addr      = expression_to_addr(expression);
 816         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 817         ir_node  *memory    = get_store();
 818         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 819         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 820         set_store(store_mem);
 821 }
 822
 823 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 824 {
 825         ir_mode *value_mode = get_irn_mode(value);
 826
 827         if (value_mode == dest_mode || is_Bad(value))
 828                 return value;
 829
 830         if(dest_mode == mode_b) {
 831                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 832                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 833                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 834                 return proj;
 835         }
 836
 837         return new_d_Conv(dbgi, value, dest_mode);
 838 }
 839
 840 static ir_node *create_incdec(const unary_expression_t *expression)
 841 {
 842         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
 843         type_t       *type  = expression->expression.datatype;
 844         ir_mode      *mode  = get_ir_mode(type);
 845         expression_t *value = expression->value;
 846
 847         ir_node *value_node = expression_to_firm(value);
 848
 849         ir_node *offset;
 850         if(type->type == TYPE_POINTER) {
 851                 pointer_type_t *pointer_type = (pointer_type_t*) type;
 852                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
 853                 offset = new_Const_long(mode_Is, elem_size);
 854         } else {
 855                 assert(is_type_arithmetic(type));
 856                 offset = new_Const(mode, get_mode_one(mode));
 857         }
 858
 859         ir_node *new_value;
 860         switch(expression->type) {
 861         case UNEXPR_POSTFIX_INCREMENT: {
 862                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 863                 set_value_for_expression(value, new_value);
 864                 return value_node;
 865         }
 866         case UNEXPR_POSTFIX_DECREMENT: {
 867                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 868                 set_value_for_expression(value, new_value);
 869                 return value_node;
 870         }
 871         case UNEXPR_PREFIX_INCREMENT: {
 872                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 873                 set_value_for_expression(value, new_value);
 874                 return new_value;
 875         }
 876         case UNEXPR_PREFIX_DECREMENT: {
 877                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 878                 set_value_for_expression(value, new_value);
 879                 return new_value;
 880         }
 881         default:
 882                 panic("no incdec expr in create_incdec");
 883         }
 884
 885         return new_value;
 886 }
 887
 888 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 889 {
 890         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 891         type_t   *type = expression->expression.datatype;
 892
 893         if(expression->type == UNEXPR_TAKE_ADDRESS)
 894                 return expression_to_addr(expression->value);
 895
 896         const expression_t *value      = expression->value;
 897         ir_node            *value_node = expression_to_firm(value);
 898
 899         switch(expression->type) {
 900         case UNEXPR_NEGATE:
 901                 return new_d_Minus(dbgi, value_node, get_ir_mode(type));
 902         case UNEXPR_PLUS:
 903                 return value_node;
 904         case UNEXPR_BITWISE_NEGATE:
 905                 return new_d_Not(dbgi, value_node, get_ir_mode(type));
 906         case UNEXPR_NOT: {
 907                 if(get_irn_mode(value_node) != mode_b) {
 908                         value_node = create_conv(dbgi, value_node, mode_b);
 909                 }
 910                 value_node = new_d_Not(dbgi, value_node, mode_b);
 911                 ir_mode *const mode = get_ir_mode(type);
 912                 if(mode != mode_b) {
 913                         value_node = create_conv(dbgi, value_node, mode);
 914                 }
 915                 return value_node;
 916         }
 917         case UNEXPR_DEREFERENCE:
 918                 return deref_address(type, value_node, dbgi);
 919         case UNEXPR_POSTFIX_INCREMENT:
 920         case UNEXPR_POSTFIX_DECREMENT:
 921         case UNEXPR_PREFIX_INCREMENT:
 922         case UNEXPR_PREFIX_DECREMENT:
 923                 return create_incdec(expression);
 924         case UNEXPR_CAST:
 925                 return create_conv(dbgi, value_node, get_ir_mode(type));
 926
 927         case UNEXPR_TAKE_ADDRESS:
 928         case UNEXPR_INVALID:
 929                 break;
 930         }
 931         panic("invalid UNEXPR type found");
 932 }
 933
 934 static long get_pnc(binary_expression_type_t type)
 935 {
 936         switch(type) {
 937         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 938         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 939         case BINEXPR_LESS:         return pn_Cmp_Lt;
 940         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 941         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 942         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 943         default:
 944                 break;
 945         }
 946         panic("trying to get pn_Cmp from non-comparison binexpr type");
 947 }
 948
 949 static ir_node *create_lazy_op(const binary_expression_t *expression)
 950 {
 951         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 952         type_t   *type = expression->expression.datatype;
 953         ir_mode  *mode = get_ir_mode(type);
 954
 955         ir_node *cur_block = get_cur_block();
 956
 957         ir_node *one_block = new_immBlock();
 958         ir_node *one       = new_Const(mode, get_mode_one(mode));
 959         ir_node *jmp_one   = new_d_Jmp(dbgi);
 960
 961         ir_node *zero_block = new_immBlock();
 962         ir_node *zero       = new_Const(mode, get_mode_null(mode));
 963         ir_node *jmp_zero   = new_d_Jmp(dbgi);
 964
 965         set_cur_block(cur_block);
 966         create_condition_evaluation((const expression_t*) expression,
 967                                     one_block, zero_block);
 968         mature_immBlock(one_block);
 969         mature_immBlock(zero_block);
 970
 971         ir_node *common_block = new_immBlock();
 972         add_immBlock_pred(common_block, jmp_one);
 973         add_immBlock_pred(common_block, jmp_zero);
 974         mature_immBlock(common_block);
 975
 976         ir_node *in[2] = { one, zero };
 977         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
 978
 979         return val;
 980 }
 981
 982 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
 983                                             ir_node *right, ir_mode *mode);
 984
 985 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
 986                                         create_arithmetic_func func)
 987 {
 988         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 989         ir_node  *left  = expression_to_firm(expression->left);
 990         ir_node  *right = expression_to_firm(expression->right);
 991         type_t   *type  = expression->right->datatype;
 992         /* be careful with the modes, because in arithmetic assign nodes only
 993          * the right operand has the mode of the arithmetic already */
 994         ir_mode  *mode  = get_ir_mode(type);
 995         left            = create_conv(dbgi, left, mode);
 996         ir_node  *res   = func(dbgi, left, right, mode);
 997
 998         return res;
 999 }
1000
1001 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1002                                    ir_node  *      integer,
1003                                    type_t   *const type,
1004                                    dbg_info *const dbgi,
1005                                    const create_arithmetic_func func)
1006 {
1007         pointer_type_t *const pointer_type = (pointer_type_t*)type;
1008         type_t         *const points_to    = pointer_type->points_to;
1009         const unsigned        elem_size    = get_type_size(points_to);
1010
1011         assert(elem_size >= 1);
1012         if (elem_size > 1) {
1013                 integer             = create_conv(dbgi, integer, mode_Is);
1014                 ir_node *const cnst = new_Const_long(mode_Is, (long)elem_size);
1015                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
1016                 integer = mul;
1017         }
1018
1019         ir_mode *const mode = get_ir_mode(type);
1020         return func(dbgi, pointer, integer, mode);
1021 }
1022
1023 static ir_node *create_arithmetic_assign_binop(
1024                 const binary_expression_t *expression, create_arithmetic_func func)
1025 {
1026         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1027         type_t   *const type = expression->expression.datatype;
1028         ir_node  *value;
1029
1030         if (type->type == TYPE_POINTER) {
1031                 ir_node        *const pointer = expression_to_firm(expression->left);
1032                 ir_node        *      integer = expression_to_firm(expression->right);
1033                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1034         } else {
1035                 value = create_arithmetic_binop(expression, func);
1036         }
1037
1038         ir_mode  *const mode = get_ir_mode(type);
1039         value = create_conv(dbgi, value, mode);
1040         set_value_for_expression(expression->left, value);
1041
1042         return value;
1043 }
1044
1045 static ir_node *create_add(const binary_expression_t *expression)
1046 {
1047         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1048         ir_node  *left  = expression_to_firm(expression->left);
1049         ir_node  *right = expression_to_firm(expression->right);
1050         type_t   *type  = expression->expression.datatype;
1051
1052         expression_t *expr_left  = expression->left;
1053         expression_t *expr_right = expression->right;
1054         type_t       *type_left  = skip_typeref(expr_left->datatype);
1055         type_t       *type_right = skip_typeref(expr_right->datatype);
1056
1057         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1058                 ir_mode *const mode = get_ir_mode(type);
1059                 return new_d_Add(dbgi, left, right, mode);
1060         }
1061
1062         if (type_left->type == TYPE_POINTER || type_left->type == TYPE_ARRAY) {
1063                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1064         } else {
1065                 assert(type_right->type == TYPE_POINTER || type_right->type == TYPE_ARRAY);
1066                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1067         }
1068 }
1069
1070 static ir_node *create_sub(const binary_expression_t *expression)
1071 {
1072         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1073         expression_t *const expr_left  = expression->left;
1074         expression_t *const expr_right = expression->right;
1075         ir_node      *const left       = expression_to_firm(expr_left);
1076         ir_node      *const right      = expression_to_firm(expr_right);
1077         type_t       *const type       = expression->expression.datatype;
1078         type_t       *const type_left  = skip_typeref(expr_left->datatype);
1079         type_t       *const type_right = skip_typeref(expr_right->datatype);
1080
1081         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1082                 ir_mode *const mode = get_ir_mode(type);
1083                 return new_d_Sub(dbgi, left, right, mode);
1084         } else if (type_left->type == TYPE_POINTER && type_right->type == TYPE_POINTER) {
1085                 const pointer_type_t *const ptr_type = (const pointer_type_t*)type_left;
1086                 const unsigned elem_size             = get_type_size(ptr_type->points_to);
1087                 ir_mode *const mode   = get_ir_mode(type);
1088                 ir_node *const sub    = new_d_Sub(dbgi, left, right, mode);
1089                 ir_node *const cnst   = new_Const_long(mode_Is, (long)elem_size);
1090                 ir_node *const no_mem = new_NoMem();
1091                 ir_node *const div    = new_d_Div(dbgi, no_mem, sub, cnst, mode,
1092                                                   op_pin_state_floats);
1093                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
1094         }
1095
1096         assert(type_left->type == TYPE_POINTER);
1097         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1098 }
1099
1100 static ir_node *create_shift(const binary_expression_t *expression)
1101 {
1102         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1103         ir_node  *left  = expression_to_firm(expression->left);
1104         ir_node  *right = expression_to_firm(expression->right);
1105         type_t   *type  = expression->expression.datatype;
1106         ir_mode  *mode  = get_ir_mode(type);
1107
1108         /* firm always wants the shift count to be unsigned */
1109         right = create_conv(dbgi, right, mode_Iu);
1110
1111         ir_node *res;
1112
1113         switch(expression->type) {
1114         case BINEXPR_SHIFTLEFT:
1115                 res = new_d_Shl(dbgi, left, right, mode);
1116                 break;
1117         case BINEXPR_SHIFTRIGHT: {
1118                  expression_t *expr_left = expression->left;
1119                  type_t       *type_left = skip_typeref(expr_left->datatype);
1120
1121                  if(is_type_signed(type_left)) {
1122                         res = new_d_Shrs(dbgi, left, right, mode);
1123                  } else {
1124                          res = new_d_Shr(dbgi, left, right, mode);
1125                  }
1126                  break;
1127         }
1128         default:
1129                 panic("create shift op called for non-shift op");
1130         }
1131
1132         return res;
1133 }
1134
1135
1136 static ir_node *create_divmod(const binary_expression_t *expression)
1137 {
1138         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1139         ir_node  *left  = expression_to_firm(expression->left);
1140         ir_node  *right = expression_to_firm(expression->right);
1141         ir_node  *pin   = new_Pin(new_NoMem());
1142         type_t   *type  = expression->expression.datatype;
1143         ir_mode  *mode  = get_ir_mode(type);
1144         ir_node  *op;
1145         ir_node  *res;
1146
1147         switch (expression->type)  {
1148                 case BINEXPR_DIV:
1149                 case BINEXPR_DIV_ASSIGN:
1150                         if(mode_is_float(mode)) {
1151                                 op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1152                                 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1153                         } else {
1154                                 op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1155                                 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1156                         }
1157                         break;
1158
1159                 case BINEXPR_MOD:
1160                 case BINEXPR_MOD_ASSIGN:
1161                         assert(!mode_is_float(mode));
1162                         op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1163                         res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1164                         break;
1165
1166                 default: panic("unexpected binary expression type in create_divmod()");
1167         }
1168
1169         return res;
1170 }
1171
1172 static ir_node *create_arithmetic_assign_divmod(
1173                 const binary_expression_t *expression)
1174 {
1175         ir_node  *      value = create_divmod(expression);
1176         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1177         type_t   *const type  = expression->expression.datatype;
1178         ir_mode  *const mode  = get_ir_mode(type);
1179
1180         assert(type->type != TYPE_POINTER);
1181
1182         value = create_conv(dbgi, value, mode);
1183         set_value_for_expression(expression->left, value);
1184
1185         return value;
1186 }
1187
1188
1189 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1190 {
1191         binary_expression_type_t type = expression->type;
1192         switch(type) {
1193         case BINEXPR_EQUAL:
1194         case BINEXPR_NOTEQUAL:
1195         case BINEXPR_LESS:
1196         case BINEXPR_LESSEQUAL:
1197         case BINEXPR_GREATER:
1198         case BINEXPR_GREATEREQUAL: {
1199                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1200                 ir_node *left  = expression_to_firm(expression->left);
1201                 ir_node *right = expression_to_firm(expression->right);
1202                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1203                 long     pnc   = get_pnc(type);
1204                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1205                 return proj;
1206         }
1207         case BINEXPR_ASSIGN: {
1208                 ir_node *right = expression_to_firm(expression->right);
1209                 set_value_for_expression(expression->left, right);
1210                 return right;
1211         }
1212         case BINEXPR_ADD:
1213                 return create_add(expression);
1214         case BINEXPR_SUB:
1215                 return create_sub(expression);
1216         case BINEXPR_MUL:
1217                 return create_arithmetic_binop(expression, new_d_Mul);
1218         case BINEXPR_BITWISE_AND:
1219                 return create_arithmetic_binop(expression, new_d_And);
1220         case BINEXPR_BITWISE_OR:
1221                 return create_arithmetic_binop(expression, new_d_Or);
1222         case BINEXPR_BITWISE_XOR:
1223                 return create_arithmetic_binop(expression, new_d_Eor);
1224         case BINEXPR_SHIFTLEFT:
1225         case BINEXPR_SHIFTRIGHT:
1226                 return create_shift(expression);
1227         case BINEXPR_DIV:
1228         case BINEXPR_MOD:
1229                 return create_divmod(expression);
1230         case BINEXPR_LOGICAL_AND:
1231         case BINEXPR_LOGICAL_OR:
1232                 return create_lazy_op(expression);
1233         case BINEXPR_COMMA:
1234                 expression_to_firm(expression->left);
1235                 return expression_to_firm(expression->right);
1236         case BINEXPR_ADD_ASSIGN:
1237                 return create_arithmetic_assign_binop(expression, new_d_Add);
1238         case BINEXPR_SUB_ASSIGN:
1239                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1240         case BINEXPR_MUL_ASSIGN:
1241                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1242         case BINEXPR_DIV_ASSIGN:
1243                 return create_arithmetic_assign_divmod(expression);
1244         case BINEXPR_BITWISE_AND_ASSIGN:
1245                 return create_arithmetic_assign_binop(expression, new_d_And);
1246         case BINEXPR_BITWISE_OR_ASSIGN:
1247                 return create_arithmetic_assign_binop(expression, new_d_Or);
1248         case BINEXPR_BITWISE_XOR_ASSIGN:
1249                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1250         case BINEXPR_SHIFTLEFT_ASSIGN:
1251                 return create_arithmetic_assign_binop(expression, new_d_Shl);
1252         case BINEXPR_SHIFTRIGHT_ASSIGN:
1253                 return create_arithmetic_assign_binop(expression, new_d_Shr);
1254         default:
1255                 panic("TODO binexpr type");
1256         }
1257 }
1258
1259 static ir_node *array_access_addr(const array_access_expression_t *expression)
1260 {
1261         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1262         ir_node  *base_addr;
1263         ir_node  *offset;
1264
1265         type_t   *type_left  = skip_typeref(expression->array_ref->datatype);
1266         type_t   *type_right = skip_typeref(expression->index->datatype);
1267
1268         if(type_left->type == TYPE_POINTER || type_left->type == TYPE_ARRAY) {
1269                 base_addr = expression_to_firm(expression->array_ref);
1270                 offset    = expression_to_firm(expression->index);
1271         } else {
1272                 assert(type_right->type == TYPE_POINTER
1273                                 || type_right->type == TYPE_ARRAY);
1274                 base_addr = expression_to_firm(expression->index);
1275                 offset    = expression_to_firm(expression->array_ref);
1276         }
1277         offset    = create_conv(dbgi, offset, mode_Iu);
1278
1279         unsigned elem_size       = get_type_size(expression->expression.datatype);
1280         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1281         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1282                                              mode_Iu);
1283         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1284
1285         return result;
1286 }
1287
1288 static ir_node *array_access_to_firm(
1289                 const array_access_expression_t *expression)
1290 {
1291         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1292         ir_node  *addr = array_access_addr(expression);
1293         type_t   *type = skip_typeref(expression->expression.datatype);
1294         return deref_address(type, addr, dbgi);
1295 }
1296
1297 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1298 {
1299         type_t *type = expression->type;
1300         if(type == NULL) {
1301                 type = expression->size_expression->datatype;
1302                 assert(type != NULL);
1303         }
1304
1305         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1306         unsigned  size      = get_type_size(type);
1307         ir_node  *size_node = new_Const_long(mode, size);
1308
1309         return size_node;
1310 }
1311
1312 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1313 {
1314         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1315
1316         ir_node *cur_block   = get_cur_block();
1317
1318         /* create the true block */
1319         ir_node *true_block  = new_immBlock();
1320
1321         ir_node *true_val = expression_to_firm(expression->true_expression);
1322         ir_node *true_jmp = new_Jmp();
1323
1324         /* create the false block */
1325         ir_node *false_block = new_immBlock();
1326
1327         ir_node *false_val = expression_to_firm(expression->false_expression);
1328         ir_node *false_jmp = new_Jmp();
1329
1330         /* create the condition evaluation */
1331         set_cur_block(cur_block);
1332         create_condition_evaluation(expression->condition, true_block, false_block);
1333         mature_immBlock(true_block);
1334         mature_immBlock(false_block);
1335
1336         /* create the common block */
1337         ir_node *common_block = new_immBlock();
1338         add_immBlock_pred(common_block, true_jmp);
1339         add_immBlock_pred(common_block, false_jmp);
1340         mature_immBlock(common_block);
1341
1342         /* TODO improve static semantics, so either both or no values are NULL */
1343         if (true_val == NULL || false_val == NULL) return NULL;
1344
1345         ir_node *in[2] = { true_val, false_val };
1346         ir_mode *mode  = get_irn_mode(true_val);
1347         assert(get_irn_mode(false_val) == mode);
1348         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1349
1350         return val;
1351 }
1352
1353 static ir_node *select_addr(const select_expression_t *expression)
1354 {
1355         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1356
1357         ir_node *compound_addr = expression_to_firm(expression->compound);
1358
1359         declaration_t *entry = expression->compound_entry;
1360         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1361         ir_entity     *entity = entry->v.entity;
1362
1363         assert(entity != NULL);
1364
1365         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1366
1367         return sel;
1368 }
1369
1370 static ir_node *select_to_firm(const select_expression_t *expression)
1371 {
1372         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1373         ir_node  *addr = select_addr(expression);
1374         type_t   *type = skip_typeref(expression->expression.datatype);
1375         return deref_address(type, addr, dbgi);
1376 }
1377
1378 /* Values returned by __builtin_classify_type. */
1379 typedef enum gcc_type_class
1380 {
1381         no_type_class = -1,
1382         void_type_class,
1383         integer_type_class,
1384         char_type_class,
1385         enumeral_type_class,
1386         boolean_type_class,
1387         pointer_type_class,
1388         reference_type_class,
1389         offset_type_class,
1390         real_type_class,
1391         complex_type_class,
1392         function_type_class,
1393         method_type_class,
1394         record_type_class,
1395         union_type_class,
1396         array_type_class,
1397         string_type_class,
1398         set_type_class,
1399         file_type_class,
1400         lang_type_class
1401 } gcc_type_class;
1402
1403 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
1404 {
1405         const type_t *const type = expr->type_expression->datatype;
1406
1407         gcc_type_class tc;
1408         switch (type->type)
1409         {
1410                 case TYPE_ATOMIC: {
1411                         const atomic_type_t *const atomic_type = (const atomic_type_t*)type;
1412                         switch (atomic_type->atype) {
1413                                 // should not be reached
1414                                 case ATOMIC_TYPE_INVALID:
1415                                         tc = no_type_class;
1416                                         break;
1417
1418                                 // gcc cannot do that
1419                                 case ATOMIC_TYPE_VOID:
1420                                         tc = void_type_class;
1421                                         break;
1422
1423                                 case ATOMIC_TYPE_CHAR:      // gcc handles this as integer
1424                                 case ATOMIC_TYPE_SCHAR:     // gcc handles this as integer
1425                                 case ATOMIC_TYPE_UCHAR:     // gcc handles this as integer
1426                                 case ATOMIC_TYPE_SHORT:
1427                                 case ATOMIC_TYPE_USHORT:
1428                                 case ATOMIC_TYPE_INT:
1429                                 case ATOMIC_TYPE_UINT:
1430                                 case ATOMIC_TYPE_LONG:
1431                                 case ATOMIC_TYPE_ULONG:
1432                                 case ATOMIC_TYPE_LONGLONG:
1433                                 case ATOMIC_TYPE_ULONGLONG:
1434                                 case ATOMIC_TYPE_BOOL:      // gcc handles this as integer
1435                                         tc = integer_type_class;
1436                                         break;
1437
1438                                 case ATOMIC_TYPE_FLOAT:
1439                                 case ATOMIC_TYPE_DOUBLE:
1440                                 case ATOMIC_TYPE_LONG_DOUBLE:
1441                                         tc = real_type_class;
1442                                         break;
1443
1444 #ifdef PROVIDE_COMPLEX
1445                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
1446                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
1447                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
1448                                         tc = complex_type_class;
1449                                         break;
1450                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
1451                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
1452                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
1453                                         tc = complex_type_class;
1454                                         break;
1455 #endif
1456
1457                                 default:
1458                                         panic("Unimplemented case in classify_type_to_firm().");
1459                         }
1460                         break;
1461                 }
1462
1463                 case TYPE_ARRAY:           // gcc handles this as pointer
1464                 case TYPE_FUNCTION:        // gcc handles this as pointer
1465                 case TYPE_POINTER:         tc = pointer_type_class; break;
1466                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
1467                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
1468
1469                 // gcc handles this as integer
1470                 case TYPE_ENUM:            tc = integer_type_class; break;
1471
1472                 default:
1473                         panic("Unimplemented case in classify_type_to_firm().");
1474         }
1475
1476         dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
1477         ir_mode  *const mode = mode_Is;
1478         tarval   *const tv   = new_tarval_from_long(tc, mode);
1479         return new_d_Const(dbgi, mode, tv);
1480 }
1481
1482 static ir_node *function_name_to_firm(const string_literal_t *const expr)
1483 {
1484         if (current_function_name == NULL) {
1485                 const source_position_t *const src_pos =
1486                         &expr->expression.source_position;
1487                 const char *const name = current_function_decl->symbol->string;
1488                 current_function_name = string_to_firm(src_pos, "__func__", name);
1489         }
1490
1491         return current_function_name;
1492 }
1493
1494 static ir_node *dereference_addr(const unary_expression_t *const expression)
1495 {
1496         assert(expression->type == UNEXPR_DEREFERENCE);
1497         return expression_to_firm(expression->value);
1498 }
1499
1500 static ir_node *expression_to_addr(const expression_t *expression)
1501 {
1502         switch(expression->type) {
1503         case EXPR_REFERENCE:
1504                 return reference_addr((const reference_expression_t*) expression);
1505         case EXPR_ARRAY_ACCESS:
1506                 return array_access_addr((const array_access_expression_t*) expression);
1507         case EXPR_SELECT:
1508                 return select_addr((const select_expression_t*) expression);
1509         case EXPR_UNARY: {
1510                 const unary_expression_t *const unary_expr =
1511                         (const unary_expression_t*)expression;
1512                 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1513                         return dereference_addr(unary_expr);
1514                 }
1515                 break;
1516         }
1517         default:
1518                 break;
1519         }
1520         panic("trying to get address of non-lvalue");
1521 }
1522
1523 static ir_node *_expression_to_firm(const expression_t *expression)
1524 {
1525         switch(expression->type) {
1526         case EXPR_CONST:
1527                 return const_to_firm((const const_t*) expression);
1528         case EXPR_STRING_LITERAL:
1529                 return string_literal_to_firm((const string_literal_t*) expression);
1530         case EXPR_REFERENCE:
1531                 return reference_expression_to_firm(
1532                                 (const reference_expression_t*) expression);
1533         case EXPR_CALL:
1534                 return call_expression_to_firm((const call_expression_t*) expression);
1535         case EXPR_UNARY:
1536                 return unary_expression_to_firm((const unary_expression_t*) expression);
1537         case EXPR_BINARY:
1538                 return binary_expression_to_firm(
1539                                 (const binary_expression_t*) expression);
1540         case EXPR_ARRAY_ACCESS:
1541                 return array_access_to_firm(
1542                                 (const array_access_expression_t*) expression);
1543         case EXPR_SIZEOF:
1544                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1545         case EXPR_CONDITIONAL:
1546                 return conditional_to_firm((const conditional_expression_t*)expression);
1547         case EXPR_SELECT:
1548                 return select_to_firm((const select_expression_t*) expression);
1549         case EXPR_CLASSIFY_TYPE:
1550                 return classify_type_to_firm((const classify_type_expression_t*)expression);
1551         case EXPR_FUNCTION:
1552         case EXPR_PRETTY_FUNCTION:
1553                 return function_name_to_firm((const string_literal_t*)expression);
1554         case EXPR_OFFSETOF:
1555         case EXPR_VA_ARG:
1556         case EXPR_STATEMENT:
1557         case EXPR_BUILTIN_SYMBOL:
1558                 panic("unimplemented expression found");
1559
1560         case EXPR_UNKNOWN:
1561         case EXPR_INVALID:
1562                 break;
1563         }
1564         panic("invalid expression found");
1565 }
1566
1567 static ir_node *expression_to_firm(const expression_t *expression)
1568 {
1569         ir_node *res = _expression_to_firm(expression);
1570
1571         if(res != NULL && get_irn_mode(res) == mode_b) {
1572                 ir_mode *mode = get_ir_mode(expression->datatype);
1573                 res           = create_conv(NULL, res, mode);
1574         }
1575
1576         return res;
1577 }
1578
1579 static ir_node *expression_to_modeb(const expression_t *expression)
1580 {
1581         ir_node *res = _expression_to_firm(expression);
1582         res          = create_conv(NULL, res, mode_b);
1583
1584         return res;
1585 }
1586
1587 /**
1588  * create a short-circuit expression evaluation that tries to construct
1589  * efficient control flow structures for &&, || and ! expressions
1590  */
1591 static void create_condition_evaluation(const expression_t *expression,
1592                                         ir_node *true_block,
1593                                         ir_node *false_block)
1594 {
1595         switch(expression->type) {
1596         case EXPR_UNARY: {
1597                 unary_expression_t *unary_expression = (unary_expression_t*) expression;
1598                 if(unary_expression->type == UNEXPR_NOT) {
1599                         create_condition_evaluation(unary_expression->value, false_block,
1600                                                     true_block);
1601                         return;
1602                 }
1603                 break;
1604         }
1605         case EXPR_BINARY: {
1606                 binary_expression_t *binary_expression
1607                         = (binary_expression_t*) expression;
1608                 if(binary_expression->type == BINEXPR_LOGICAL_AND) {
1609                         ir_node *cur_block   = get_cur_block();
1610                         ir_node *extra_block = new_immBlock();
1611                         set_cur_block(cur_block);
1612                         create_condition_evaluation(binary_expression->left, extra_block,
1613                                                     false_block);
1614                         mature_immBlock(extra_block);
1615                         set_cur_block(extra_block);
1616                         create_condition_evaluation(binary_expression->right, true_block,
1617                                                     false_block);
1618                         return;
1619                 }
1620                 if(binary_expression->type == BINEXPR_LOGICAL_OR) {
1621                         ir_node *cur_block   = get_cur_block();
1622                         ir_node *extra_block = new_immBlock();
1623                         set_cur_block(cur_block);
1624                         create_condition_evaluation(binary_expression->left, true_block,
1625                                                     extra_block);
1626                         mature_immBlock(extra_block);
1627                         set_cur_block(extra_block);
1628                         create_condition_evaluation(binary_expression->right, true_block,
1629                                                     false_block);
1630                         return;
1631                 }
1632                 break;
1633         }
1634         default:
1635                 break;
1636         }
1637
1638         dbg_info *dbgi       = get_dbg_info(&expression->source_position);
1639         ir_node  *condition  = expression_to_modeb(expression);
1640         ir_node  *cond       = new_d_Cond(dbgi, condition);
1641         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1642         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1643
1644         add_immBlock_pred(true_block, true_proj);
1645         add_immBlock_pred(false_block, false_proj);
1646
1647         set_cur_block(NULL);
1648 }
1649
1650 static void statement_to_firm(statement_t *statement);
1651
1652 static void return_statement_to_firm(return_statement_t *statement)
1653 {
1654         if(get_cur_block() == NULL)
1655                 return;
1656
1657         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1658         ir_node  *ret;
1659
1660         if(statement->return_value != NULL) {
1661                 ir_node *retval = expression_to_firm(statement->return_value);
1662                 ir_node *in[1];
1663
1664                 in[0] = retval;
1665                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1666         } else {
1667                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1668         }
1669         ir_node *end_block = get_irg_end_block(current_ir_graph);
1670         add_immBlock_pred(end_block, ret);
1671
1672         set_cur_block(NULL);
1673 }
1674
1675 static void compound_statement_to_firm(compound_statement_t *compound)
1676 {
1677         statement_t *statement = compound->statements;
1678         for( ; statement != NULL; statement = statement->next) {
1679                 //context2firm(&statement->context);
1680                 statement_to_firm(statement);
1681         }
1682 }
1683
1684 static void expression_statement_to_firm(expression_statement_t *statement)
1685 {
1686         if(get_cur_block() == NULL)
1687                 return;
1688
1689         expression_to_firm(statement->expression);
1690 }
1691
1692 static void if_statement_to_firm(if_statement_t *statement)
1693 {
1694         ir_node *cur_block = get_cur_block();
1695
1696         ir_node *fallthrough_block = new_immBlock();
1697
1698         /* the true (blocks) */
1699         ir_node *true_block;
1700         if (statement->true_statement != NULL) {
1701                 true_block = new_immBlock();
1702                 statement_to_firm(statement->true_statement);
1703                 if(get_cur_block() != NULL) {
1704                         ir_node *jmp = new_Jmp();
1705                         add_immBlock_pred(fallthrough_block, jmp);
1706                 }
1707         } else {
1708                 true_block = fallthrough_block;
1709         }
1710
1711         /* the false (blocks) */
1712         ir_node *false_block;
1713         if(statement->false_statement != NULL) {
1714                 false_block = new_immBlock();
1715
1716                 statement_to_firm(statement->false_statement);
1717                 if(get_cur_block() != NULL) {
1718                         ir_node *jmp = new_Jmp();
1719                         add_immBlock_pred(fallthrough_block, jmp);
1720                 }
1721         } else {
1722                 false_block = fallthrough_block;
1723         }
1724
1725         /* create the condition */
1726         if(cur_block != NULL) {
1727                 set_cur_block(cur_block);
1728                 create_condition_evaluation(statement->condition, true_block,
1729                                             false_block);
1730         }
1731
1732         mature_immBlock(true_block);
1733         if(false_block != fallthrough_block) {
1734                 mature_immBlock(false_block);
1735         }
1736         mature_immBlock(fallthrough_block);
1737
1738         set_cur_block(fallthrough_block);
1739 }
1740
1741 static void while_statement_to_firm(while_statement_t *statement)
1742 {
1743         ir_node *jmp = NULL;
1744         if(get_cur_block() != NULL) {
1745                 jmp = new_Jmp();
1746         }
1747
1748         /* create the header block */
1749         ir_node *header_block = new_immBlock();
1750         if(jmp != NULL) {
1751                 add_immBlock_pred(header_block, jmp);
1752         }
1753
1754         /* the false block */
1755         ir_node *false_block = new_immBlock();
1756
1757         /* the loop body */
1758         ir_node *body_block;
1759         if (statement->body != NULL) {
1760                 ir_node *old_continue_label = continue_label;
1761                 ir_node *old_break_label    = break_label;
1762                 continue_label              = header_block;
1763                 break_label                 = false_block;
1764
1765                 body_block = new_immBlock();
1766                 statement_to_firm(statement->body);
1767
1768                 assert(continue_label == header_block);
1769                 assert(break_label    == false_block);
1770                 continue_label = old_continue_label;
1771                 break_label    = old_break_label;
1772
1773                 if(get_cur_block() != NULL) {
1774                         ir_node *jmp = new_Jmp();
1775                         add_immBlock_pred(header_block, jmp);
1776                 }
1777         } else {
1778                 body_block = header_block;
1779         }
1780
1781         /* create the condition */
1782         set_cur_block(header_block);
1783
1784         create_condition_evaluation(statement->condition, body_block, false_block);
1785         mature_immBlock(body_block);
1786         mature_immBlock(false_block);
1787         mature_immBlock(header_block);
1788
1789         set_cur_block(false_block);
1790 }
1791
1792 static void do_while_statement_to_firm(do_while_statement_t *statement)
1793 {
1794         ir_node *jmp = NULL;
1795         if(get_cur_block() != NULL) {
1796                 jmp = new_Jmp();
1797         }
1798
1799         /* create the header block */
1800         ir_node *header_block = new_immBlock();
1801
1802         /* the false block */
1803         ir_node *false_block = new_immBlock();
1804
1805         /* the loop body */
1806         ir_node *body_block = new_immBlock();
1807         if(jmp != NULL) {
1808                 add_immBlock_pred(body_block, jmp);
1809         }
1810
1811         if (statement->body != NULL) {
1812                 ir_node *old_continue_label = continue_label;
1813                 ir_node *old_break_label    = break_label;
1814                 continue_label              = header_block;
1815                 break_label                 = false_block;
1816
1817                 statement_to_firm(statement->body);
1818
1819                 assert(continue_label == header_block);
1820                 assert(break_label    == false_block);
1821                 continue_label = old_continue_label;
1822                 break_label    = old_break_label;
1823
1824                 if (get_cur_block() == NULL) {
1825                         mature_immBlock(header_block);
1826                         mature_immBlock(body_block);
1827                         mature_immBlock(false_block);
1828                         return;
1829                 }
1830         }
1831
1832         ir_node *body_jmp = new_Jmp();
1833         add_immBlock_pred(header_block, body_jmp);
1834         mature_immBlock(header_block);
1835
1836         /* create the condition */
1837         set_cur_block(header_block);
1838
1839         create_condition_evaluation(statement->condition, body_block, false_block);
1840         mature_immBlock(body_block);
1841         mature_immBlock(false_block);
1842         mature_immBlock(header_block);
1843
1844         set_cur_block(false_block);
1845 }
1846
1847 static void for_statement_to_firm(for_statement_t *statement)
1848 {
1849         ir_node *jmp = NULL;
1850         if (get_cur_block() != NULL) {
1851                 if(statement->initialisation != NULL) {
1852                         expression_to_firm(statement->initialisation);
1853                 }
1854                 jmp = new_Jmp();
1855         }
1856
1857         /* create the step block */
1858         ir_node *const step_block = new_immBlock();
1859         if (statement->step != NULL) {
1860                 expression_to_firm(statement->step);
1861         }
1862         ir_node *const step_jmp = new_Jmp();
1863
1864         /* create the header block */
1865         ir_node *const header_block = new_immBlock();
1866         if (jmp != NULL) {
1867                 add_immBlock_pred(header_block, jmp);
1868         }
1869         add_immBlock_pred(header_block, step_jmp);
1870
1871         /* the false block */
1872         ir_node *const false_block = new_immBlock();
1873
1874         /* the loop body */
1875         ir_node * body_block;
1876         if (statement->body != NULL) {
1877                 ir_node *const old_continue_label = continue_label;
1878                 ir_node *const old_break_label    = break_label;
1879                 continue_label = step_block;
1880                 break_label    = false_block;
1881
1882                 body_block = new_immBlock();
1883                 statement_to_firm(statement->body);
1884
1885                 assert(continue_label == step_block);
1886                 assert(break_label    == false_block);
1887                 continue_label = old_continue_label;
1888                 break_label    = old_break_label;
1889
1890                 if (get_cur_block() != NULL) {
1891                         ir_node *const jmp = new_Jmp();
1892                         add_immBlock_pred(step_block, jmp);
1893                 }
1894         } else {
1895                 body_block = step_block;
1896         }
1897
1898         /* create the condition */
1899         set_cur_block(header_block);
1900         if (statement->condition != NULL) {
1901                 create_condition_evaluation(statement->condition, body_block,
1902                                             false_block);
1903         } else {
1904                 keep_alive(header_block);
1905                 ir_node *jmp = new_Jmp();
1906                 add_immBlock_pred(body_block, jmp);
1907         }
1908
1909         mature_immBlock(body_block);
1910         mature_immBlock(false_block);
1911         mature_immBlock(step_block);
1912         mature_immBlock(header_block);
1913         mature_immBlock(false_block);
1914
1915         set_cur_block(false_block);
1916 }
1917
1918 static void create_declaration_entity(declaration_t *declaration,
1919                                       declaration_type_t declaration_type,
1920                                       ir_type *parent_type)
1921 {
1922         ident     *id     = new_id_from_str(declaration->symbol->string);
1923         ir_type   *irtype = get_ir_type(declaration->type);
1924         ir_entity *entity = new_entity(parent_type, id, irtype);
1925         set_entity_ld_ident(entity, id);
1926
1927         declaration->declaration_type = declaration_type;
1928         declaration->v.entity         = entity;
1929         set_entity_variability(entity, variability_uninitialized);
1930         /* TODO: visibility? */
1931 }
1932
1933 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
1934
1935 enum compound_graph_entry_type_t {
1936         COMPOUND_GRAPH_ENTRY_ARRAY,
1937         COMPOUND_GRAPH_ENTRY_COMPOUND
1938 };
1939
1940 struct compound_graph_path_entry_t {
1941         int type;
1942         union {
1943                 ir_entity *entity;
1944                 int        array_index;
1945         } v;
1946         compound_graph_path_entry_t *prev;
1947 };
1948
1949 static void create_initializer_list(initializer_list_t *initializer,
1950                                     type_t *type, ir_entity *entity,
1951                                     compound_graph_path_entry_t *entry,
1952                                     int len);
1953
1954 static void create_initializer_value(initializer_value_t *initializer,
1955                                      ir_entity *entity,
1956                                      compound_graph_path_entry_t *entry,
1957                                      int len)
1958 {
1959         ir_node *node = expression_to_firm(initializer->value);
1960
1961         ir_type *type = get_entity_type(entity);
1962         compound_graph_path *path = new_compound_graph_path(type, len);
1963
1964         int i = len - 1;
1965         for( ; entry != NULL; entry = entry->prev, --i) {
1966                 assert(i >= 0);
1967                 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
1968                         set_compound_graph_path_node(path, i, entry->v.entity);
1969                 } else {
1970                         assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
1971                         set_compound_graph_path_array_index(path, i, entry->v.array_index);
1972                 }
1973         }
1974         assert(i == -1);
1975
1976         add_compound_ent_value_w_path(entity, node, path);
1977 }
1978
1979 static void create_initializer_compound(initializer_list_t *initializer,
1980                                         compound_type_t *type,
1981                                         ir_entity *entity,
1982                                         compound_graph_path_entry_t *last_entry,
1983                                         int len)
1984 {
1985         declaration_t *compound_declaration = type->declaration;
1986
1987         declaration_t *compound_entry = compound_declaration->context.declarations;
1988
1989         compound_graph_path_entry_t entry;
1990         entry.type = COMPOUND_GRAPH_ENTRY_COMPOUND;
1991         entry.prev = last_entry;
1992         ++len;
1993
1994         size_t i = 0;
1995         for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
1996                 if(compound_entry->symbol == NULL)
1997                         continue;
1998                 if(compound_entry->namespc != NAMESPACE_NORMAL)
1999                         continue;
2000
2001                 if(i >= initializer->len)
2002                         break;
2003
2004                 entry.v.entity = compound_entry->v.entity;
2005
2006                 initializer_t *sub_initializer = initializer->initializers[i];
2007
2008                 assert(compound_entry != NULL);
2009                 assert(compound_entry->declaration_type
2010                                 == DECLARATION_TYPE_COMPOUND_MEMBER);
2011
2012                 if(sub_initializer->type == INITIALIZER_VALUE) {
2013                         create_initializer_value((initializer_value_t*) sub_initializer,
2014                                                  entity, &entry, len);
2015                 } else {
2016                         assert(sub_initializer->type == INITIALIZER_LIST);
2017                         create_initializer_list((initializer_list_t*) sub_initializer,
2018                                                 compound_entry->type, entity, &entry, len);
2019                 }
2020
2021                 ++i;
2022         }
2023 }
2024
2025 static void create_initializer_array(initializer_list_t *initializer,
2026                                      array_type_t *type, ir_entity *entity,
2027                                      compound_graph_path_entry_t *last_entry,
2028                                      int len)
2029 {
2030         type_t *element_type = type->element_type;
2031
2032         compound_graph_path_entry_t entry;
2033         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2034         entry.prev = last_entry;
2035         ++len;
2036
2037         for(size_t i = 0; i < initializer->len; ++i) {
2038                 entry.v.array_index = i;
2039
2040                 initializer_t *sub_initializer = initializer->initializers[i];
2041
2042                 if(sub_initializer->type == INITIALIZER_VALUE) {
2043                         create_initializer_value((initializer_value_t*) sub_initializer,
2044                                                  entity, &entry, len);
2045                 } else {
2046                         assert(sub_initializer->type == INITIALIZER_LIST);
2047                         create_initializer_list((initializer_list_t*) sub_initializer,
2048                                                 element_type, entity, &entry, len);
2049                 }
2050         }
2051 }
2052
2053 static void create_initializer_list(initializer_list_t *initializer,
2054                                     type_t *type, ir_entity *entity,
2055                                     compound_graph_path_entry_t *entry, int len)
2056 {
2057         if(type->type == TYPE_ARRAY) {
2058                 create_initializer_array(initializer, (array_type_t*) type,
2059                                          entity, entry, len);
2060         } else {
2061                 assert(type->type == TYPE_COMPOUND_STRUCT
2062                                 || type->type == TYPE_COMPOUND_UNION);
2063                 create_initializer_compound(initializer, (compound_type_t*) type,
2064                                             entity, entry, len);
2065         }
2066 }
2067
2068 static void create_initializer(declaration_t *declaration)
2069 {
2070         initializer_t *initializer = declaration->init.initializer;
2071         if(initializer == NULL)
2072                 return;
2073
2074         if(initializer->type == INITIALIZER_VALUE) {
2075                 initializer_value_t *initializer_value
2076                         = (initializer_value_t*) initializer;
2077                 ir_node *value = expression_to_firm(initializer_value->value);
2078
2079                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
2080                         set_value(declaration->v.value_number, value);
2081                 } else {
2082                         ir_entity *entity = declaration->v.entity;
2083
2084                         set_entity_variability(entity, variability_initialized);
2085                         set_atomic_ent_value(entity, value);
2086                 }
2087         } else {
2088                 assert(initializer->type == INITIALIZER_LIST);
2089                 initializer_list_t *list = (initializer_list_t*) initializer;
2090
2091                 declaration_type_t declaration_type = declaration->declaration_type;
2092                 assert(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY
2093                                 || declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2094
2095                 ir_entity *entity = declaration->v.entity;
2096                 set_entity_variability(entity, variability_initialized);
2097
2098                 create_initializer_list(list, declaration->type, entity, NULL, 0);
2099         }
2100 }
2101
2102 static void create_local_variable(declaration_t *declaration)
2103 {
2104         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2105
2106         bool needs_entity = declaration->address_taken;
2107         type_t *type = skip_typeref(declaration->type);
2108
2109         if(type->type == TYPE_ARRAY
2110                         || type->type == TYPE_COMPOUND_STRUCT
2111                         || type->type == TYPE_COMPOUND_UNION) {
2112                 needs_entity = true;
2113         }
2114
2115         if(needs_entity) {
2116                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2117                 create_declaration_entity(declaration,
2118                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
2119                                           frame_type);
2120         } else {
2121                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2122                 declaration->v.value_number   = next_value_number_function;
2123                 ++next_value_number_function;
2124         }
2125
2126         create_initializer(declaration);
2127 }
2128
2129 static void declaration_statement_to_firm(declaration_statement_t *statement)
2130 {
2131         declaration_t *declaration = statement->declarations_begin;
2132         declaration_t *end         = statement->declarations_end->next;
2133         for( ; declaration != end; declaration = declaration->next) {
2134                 type_t *type = declaration->type;
2135
2136                 switch(declaration->storage_class) {
2137                 case STORAGE_CLASS_TYPEDEF:
2138                         continue;
2139                 case STORAGE_CLASS_STATIC:
2140                         panic("static local vars not implemented yet");
2141                 case STORAGE_CLASS_ENUM_ENTRY:
2142                         panic("enum entry declaration in local block found");
2143                 case STORAGE_CLASS_EXTERN:
2144                         panic("extern declaration in local block found");
2145                 case STORAGE_CLASS_NONE:
2146                 case STORAGE_CLASS_AUTO:
2147                 case STORAGE_CLASS_REGISTER:
2148                         if(type->type == TYPE_FUNCTION) {
2149                                 panic("nested functions not supported yet");
2150                         } else {
2151                                 create_local_variable(declaration);
2152                         }
2153                         continue;
2154                 }
2155                 panic("invalid storage class found");
2156         }
2157 }
2158
2159 static void create_jump_statement(const statement_t *statement,
2160                                   ir_node *target_block)
2161 {
2162         if(get_cur_block() == NULL)
2163                 return;
2164
2165         dbg_info *dbgi = get_dbg_info(&statement->source_position);
2166         ir_node  *jump = new_d_Jmp(dbgi);
2167         add_immBlock_pred(target_block, jump);
2168
2169         set_cur_block(NULL);
2170 }
2171
2172 static void switch_statement_to_firm(const switch_statement_t *statement)
2173 {
2174         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2175
2176         ir_node *expression  = expression_to_firm(statement->expression);
2177         ir_node *cond        = new_d_Cond(dbgi, expression);
2178         ir_node *break_block = new_immBlock();
2179
2180         set_cur_block(NULL);
2181
2182         ir_node *const old_switch_cond       = current_switch_cond;
2183         ir_node *const old_break_label       = break_label;
2184         const bool     old_saw_default_label = saw_default_label;
2185         current_switch_cond                  = cond;
2186         break_label                          = break_block;
2187
2188         statement_to_firm(statement->body);
2189
2190         if(get_cur_block() != NULL) {
2191                 ir_node *jmp = new_Jmp();
2192                 add_immBlock_pred(break_block, jmp);
2193         }
2194
2195         if (!saw_default_label) {
2196                 set_cur_block(get_nodes_block(cond));
2197                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
2198                                                         MAGIC_DEFAULT_PN_NUMBER);
2199                 add_immBlock_pred(break_block, proj);
2200         }
2201
2202         assert(current_switch_cond == cond);
2203         assert(break_label         == break_block);
2204         current_switch_cond = old_switch_cond;
2205         break_label         = old_break_label;
2206         saw_default_label   = old_saw_default_label;
2207
2208         mature_immBlock(break_block);
2209         set_cur_block(break_block);
2210 }
2211
2212 static long fold_constant(const expression_t *expression)
2213 {
2214         ir_graph *old_current_ir_graph = current_ir_graph;
2215         current_ir_graph = get_const_code_irg();
2216
2217         ir_node *cnst = expression_to_firm(expression);
2218         if(!is_Const(cnst)) {
2219                 panic("couldn't fold constantl");
2220         }
2221         tarval *tv = get_Const_tarval(cnst);
2222         if(!tarval_is_long(tv)) {
2223                 panic("folded constant not an integer");
2224         }
2225
2226         long res = get_tarval_long(tv);
2227
2228         current_ir_graph = old_current_ir_graph;
2229         return res;
2230 }
2231
2232 static void case_label_to_firm(const case_label_statement_t *statement)
2233 {
2234         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2235
2236         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
2237
2238         /* let's create a node and hope firm constant folding creates a Const
2239          * node... */
2240         ir_node *proj;
2241         set_cur_block(get_nodes_block(current_switch_cond));
2242         if(statement->expression) {
2243                 long pn = fold_constant(statement->expression);
2244                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
2245                         /* oops someone detected our cheating... */
2246                         panic("magic default pn used");
2247                 }
2248                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
2249         } else {
2250                 saw_default_label = true;
2251                 proj = new_d_defaultProj(dbgi, current_switch_cond,
2252                                          MAGIC_DEFAULT_PN_NUMBER);
2253         }
2254
2255         ir_node *block = new_immBlock();
2256         if (fallthrough != NULL) {
2257                 add_immBlock_pred(block, fallthrough);
2258         }
2259         add_immBlock_pred(block, proj);
2260         mature_immBlock(block);
2261
2262         statement_to_firm(statement->label_statement);
2263 }
2264
2265 static ir_node *get_label_block(declaration_t *label)
2266 {
2267         assert(label->namespc == NAMESPACE_LABEL);
2268
2269         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
2270                 return label->v.block;
2271         }
2272         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
2273
2274         ir_node *old_cur_block = get_cur_block();
2275         ir_node *block         = new_immBlock();
2276         set_cur_block(old_cur_block);
2277
2278         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
2279         label->v.block          = block;
2280
2281         ARR_APP1(ir_node *, imature_blocks, block);
2282
2283         return block;
2284 }
2285
2286 static void label_to_firm(const label_statement_t *statement)
2287 {
2288         ir_node *block = get_label_block(statement->label);
2289
2290         if(get_cur_block() != NULL) {
2291                 ir_node *jmp = new_Jmp();
2292                 add_immBlock_pred(block, jmp);
2293         }
2294
2295         set_cur_block(block);
2296         keep_alive(block);
2297
2298         statement_to_firm(statement->label_statement);
2299 }
2300
2301 static void goto_to_firm(const goto_statement_t *statement)
2302 {
2303         if(get_cur_block() == NULL)
2304                 return;
2305
2306         ir_node *block = get_label_block(statement->label);
2307         ir_node *jmp   = new_Jmp();
2308         add_immBlock_pred(block, jmp);
2309
2310         set_cur_block(NULL);
2311 }
2312
2313 static void statement_to_firm(statement_t *statement)
2314 {
2315         switch(statement->type) {
2316         case STATEMENT_COMPOUND:
2317                 compound_statement_to_firm((compound_statement_t*) statement);
2318                 return;
2319         case STATEMENT_RETURN:
2320                 return_statement_to_firm((return_statement_t*) statement);
2321                 return;
2322         case STATEMENT_EXPRESSION:
2323                 expression_statement_to_firm((expression_statement_t*) statement);
2324                 return;
2325         case STATEMENT_IF:
2326                 if_statement_to_firm((if_statement_t*) statement);
2327                 return;
2328         case STATEMENT_WHILE:
2329                 while_statement_to_firm((while_statement_t*) statement);
2330                 return;
2331         case STATEMENT_DO_WHILE:
2332                 do_while_statement_to_firm((do_while_statement_t*) statement);
2333                 return;
2334         case STATEMENT_DECLARATION:
2335                 declaration_statement_to_firm((declaration_statement_t*) statement);
2336                 return;
2337         case STATEMENT_BREAK:
2338                 create_jump_statement(statement, break_label);
2339                 return;
2340         case STATEMENT_CONTINUE:
2341                 create_jump_statement(statement, continue_label);
2342                 return;
2343         case STATEMENT_SWITCH:
2344                 switch_statement_to_firm((switch_statement_t*) statement);
2345                 return;
2346         case STATEMENT_CASE_LABEL:
2347                 case_label_to_firm((case_label_statement_t*) statement);
2348                 return;
2349         case STATEMENT_FOR:
2350                 for_statement_to_firm((for_statement_t*) statement);
2351                 return;
2352         case STATEMENT_LABEL:
2353                 label_to_firm((label_statement_t*) statement);
2354                 return;
2355         case STATEMENT_GOTO:
2356                 goto_to_firm((goto_statement_t*) statement);
2357                 return;
2358         default:
2359                 break;
2360         }
2361         panic("Statement not implemented\n");
2362 }
2363
2364 static int count_local_declarations(const declaration_t *      decl,
2365                                     const declaration_t *const end)
2366 {
2367         int count = 0;
2368         for (; decl != end; decl = decl->next) {
2369                 const type_t *type = skip_typeref(decl->type);
2370                 switch (type->type) {
2371                         case TYPE_ATOMIC:
2372                         case TYPE_ENUM:
2373                         case TYPE_POINTER:
2374                                 if (!decl->address_taken) ++count;
2375                                 break;
2376
2377                         default: break;
2378                 }
2379         }
2380         return count;
2381 }
2382
2383 static int count_decls_in_stmts(const statement_t *stmt)
2384 {
2385         int count = 0;
2386         for (; stmt != NULL; stmt = stmt->next) {
2387                 switch (stmt->type) {
2388                         case STATEMENT_DECLARATION: {
2389                                 const declaration_statement_t *const decl_stmt =
2390                                         (const declaration_statement_t*)stmt;
2391                                 count += count_local_declarations(decl_stmt->declarations_begin,
2392                                                                   decl_stmt->declarations_end->next);
2393                                 break;
2394                         }
2395
2396                         case STATEMENT_COMPOUND: {
2397                                 const compound_statement_t *const comp =
2398                                         (const compound_statement_t*)stmt;
2399                                 count += count_decls_in_stmts(comp->statements);
2400                                 break;
2401                         }
2402
2403                         case STATEMENT_IF: {
2404                                 const if_statement_t *const if_stmt = (const if_statement_t*)stmt;
2405                                 count += count_decls_in_stmts(if_stmt->true_statement);
2406                                 count += count_decls_in_stmts(if_stmt->false_statement);
2407                                 break;
2408                         }
2409
2410                         case STATEMENT_SWITCH: {
2411                                 const switch_statement_t *const switch_stmt =
2412                                         (const switch_statement_t*)stmt;
2413                                 count += count_decls_in_stmts(switch_stmt->body);
2414                                 break;
2415                         }
2416
2417                         case STATEMENT_LABEL: {
2418                                 const label_statement_t *const label_stmt =
2419                                         (const label_statement_t*)stmt;
2420                                 count += count_decls_in_stmts(label_stmt->label_statement);
2421                                 break;
2422                         }
2423
2424                         case STATEMENT_WHILE: {
2425                                 const while_statement_t *const while_stmt =
2426                                         (const while_statement_t*)stmt;
2427                                 count += count_decls_in_stmts(while_stmt->body);
2428                                 break;
2429                         }
2430
2431                         case STATEMENT_DO_WHILE: {
2432                                 const do_while_statement_t *const do_while_stmt =
2433                                         (const do_while_statement_t*)stmt;
2434                                 count += count_decls_in_stmts(do_while_stmt->body);
2435                                 break;
2436                         }
2437
2438                         case STATEMENT_FOR: {
2439                                 const for_statement_t *const for_stmt =
2440                                         (const for_statement_t*)stmt;
2441                                 /* TODO initialisation */
2442                                 count += count_decls_in_stmts(for_stmt->body);
2443                                 break;
2444                         }
2445
2446                         case STATEMENT_BREAK:
2447                         case STATEMENT_CASE_LABEL:
2448                         case STATEMENT_CONTINUE:
2449                         case STATEMENT_EXPRESSION:
2450                         case STATEMENT_GOTO:
2451                         case STATEMENT_INVALID:
2452                         case STATEMENT_RETURN:
2453                                 break;
2454                 }
2455         }
2456         return count;
2457 }
2458
2459 static int get_function_n_local_vars(declaration_t *declaration)
2460 {
2461         int count = 0;
2462
2463         /* count parameters */
2464         count += count_local_declarations(declaration->context.declarations, NULL);
2465
2466         /* count local variables declared in body */
2467         count += count_decls_in_stmts(declaration->init.statement);
2468
2469         return count;
2470 }
2471
2472 static void initialize_function_parameters(declaration_t *declaration)
2473 {
2474         ir_graph        *irg             = current_ir_graph;
2475         ir_node         *args            = get_irg_args(irg);
2476         ir_node         *start_block     = get_irg_start_block(irg);
2477         ir_type         *function_irtype = get_ir_type(declaration->type);
2478
2479         int            n         = 0;
2480         declaration_t *parameter = declaration->context.declarations;
2481         for( ; parameter != NULL; parameter = parameter->next) {
2482                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
2483                 type_t *type = parameter->type;
2484
2485                 bool needs_entity = parameter->address_taken;
2486                 if(type->type == TYPE_COMPOUND_STRUCT
2487                                 || type->type == TYPE_COMPOUND_UNION) {
2488                         needs_entity = true;
2489                 }
2490
2491                 if(needs_entity) {
2492                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
2493
2494                         parameter->declaration_type
2495                                 = DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY;
2496                         parameter->v.entity = entity;
2497                         continue;
2498                 }
2499
2500                 ir_mode *mode = get_ir_mode(parameter->type);
2501                 long     pn   = n;
2502                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2503                 ++n;
2504
2505                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2506                 parameter->v.value_number   = next_value_number_function;
2507                 ++next_value_number_function;
2508
2509                 set_value(parameter->v.value_number, proj);
2510         }
2511 }
2512
2513 static void create_function(declaration_t *declaration)
2514 {
2515         ir_entity *entity = get_function_entity(declaration);
2516
2517         if(declaration->init.statement == NULL)
2518                 return;
2519
2520         current_function_decl = declaration;
2521         current_function_name = NULL;
2522
2523         assert(imature_blocks == NULL);
2524         imature_blocks = NEW_ARR_F(ir_node*, 0);
2525
2526         int       n_local_vars = get_function_n_local_vars(declaration);
2527         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
2528         ir_node  *first_block  = get_cur_block();
2529
2530         next_value_number_function = 0;
2531         initialize_function_parameters(declaration);
2532
2533         statement_to_firm(declaration->init.statement);
2534
2535         ir_node *end_block = get_irg_end_block(irg);
2536
2537         /* do we have a return statement yet? */
2538         if(get_cur_block() != NULL) {
2539                 assert(declaration->type->type == TYPE_FUNCTION);
2540                 const function_type_t* const func_type
2541                         = (const function_type_t*) declaration->type;
2542                 ir_node *ret;
2543                 if (func_type->result_type == type_void) {
2544                         ret = new_Return(get_store(), 0, NULL);
2545                 } else {
2546                         ir_mode *const mode = get_ir_mode(func_type->result_type);
2547                         ir_node *      in[1];
2548                         // §5.1.2.2.3 main implicitly returns 0
2549                         if (strcmp(declaration->symbol->string, "main") == 0) {
2550                                 in[0] = new_Const(mode, get_mode_null(mode));
2551                         } else {
2552                                 in[0] = new_Unknown(mode);
2553                         }
2554                         ret = new_Return(get_store(), 1, in);
2555                 }
2556                 add_immBlock_pred(end_block, ret);
2557         }
2558
2559         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2560                 mature_immBlock(imature_blocks[i]);
2561         }
2562         DEL_ARR_F(imature_blocks);
2563         imature_blocks = NULL;
2564
2565         mature_immBlock(first_block);
2566         mature_immBlock(end_block);
2567
2568         irg_finalize_cons(irg);
2569
2570         /* finalize the frame type */
2571         ir_type *frame_type = get_irg_frame_type(irg);
2572         int      n          = get_compound_n_members(frame_type);
2573         int      align_all  = 4;
2574         int      offset     = 0;
2575         for(int i = 0; i < n; ++i) {
2576                 ir_entity *entity      = get_compound_member(frame_type, i);
2577                 ir_type   *entity_type = get_entity_type(entity);
2578
2579                 int align = get_type_alignment_bytes(entity_type);
2580                 if(align > align_all)
2581                         align_all = align;
2582                 int misalign = 0;
2583                 if(align > 0) {
2584                         misalign  = offset % align;
2585                         if(misalign > 0) {
2586                                 offset += align - misalign;
2587                         }
2588                 }
2589
2590                 set_entity_offset(entity, offset);
2591                 offset += get_type_size_bytes(entity_type);
2592         }
2593         set_type_size_bytes(frame_type, offset);
2594         set_type_alignment_bytes(frame_type, align_all);
2595         set_type_state(frame_type, layout_fixed);
2596
2597         irg_vrfy(irg);
2598 }
2599
2600 static void create_global_variable(declaration_t *declaration)
2601 {
2602         ir_type   *global_type = get_glob_type();
2603         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
2604                                   global_type);
2605
2606         ir_entity *entity = declaration->v.entity;
2607         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
2608                 set_entity_visibility(entity, visibility_local);
2609         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
2610                 set_entity_visibility(entity, visibility_external_allocated);
2611         } else {
2612                 set_entity_visibility(entity, visibility_external_visible);
2613         }
2614         current_ir_graph = get_const_code_irg();
2615         create_initializer(declaration);
2616 }
2617
2618 static void context_to_firm(context_t *context)
2619 {
2620         declaration_t *declaration = context->declarations;
2621         for( ; declaration != NULL; declaration = declaration->next) {
2622                 if(declaration->namespc != NAMESPACE_NORMAL)
2623                         continue;
2624                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2625                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2626                         continue;
2627                 if(declaration->symbol == NULL)
2628                         continue;
2629
2630                 type_t *type = declaration->type;
2631                 if(type->type == TYPE_FUNCTION) {
2632                         create_function(declaration);
2633                 } else {
2634                         create_global_variable(declaration);
2635                 }
2636         }
2637 }
2638
2639 void translation_unit_to_firm(translation_unit_t *unit)
2640 {
2641         /* just to be sure */
2642         continue_label      = NULL;
2643         break_label         = NULL;
2644         current_switch_cond = NULL;
2645
2646         context_to_firm(& unit->context);
2647 }