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 symbol_t *symbol_alloca;
  32
  33 static int       next_value_number_function;
  34 static ir_node  *continue_label;
  35 static ir_node  *break_label;
  36 static ir_node  *current_switch_cond;
  37 static bool      saw_default_label;
  38 static ir_node **imature_blocks;
  39
  40 static const declaration_t *current_function_decl;
  41 static ir_node             *current_function_name;
  42
  43 typedef enum declaration_type_t {
  44         DECLARATION_TYPE_UNKNOWN,
  45         DECLARATION_TYPE_FUNCTION,
  46         DECLARATION_TYPE_GLOBAL_VARIABLE,
  47         DECLARATION_TYPE_LOCAL_VARIABLE,
  48         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  49         DECLARATION_TYPE_COMPOUND_MEMBER,
  50         DECLARATION_TYPE_LABEL_BLOCK,
  51 } declaration_type_t;
  52
  53 static ir_type *get_ir_type(type_t *type);
  54
  55 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  56 {
  57         (void) pos;
  58 #if 0
  59         const declaration_t *declaration = & value_numbers[pos]->declaration;
  60
  61         print_warning_prefix(declaration->source_position);
  62         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  63                         declaration->symbol->string);
  64 #endif
  65         fprintf(stderr, "Some variable might be used uninitialized\n");
  66         return new_r_Unknown(irg, mode);
  67 }
  68
  69 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  70 {
  71         const source_position_t *pos = (const source_position_t*) dbg;
  72         if(pos == NULL)
  73                 return 0;
  74         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  75                                    pos->linenr);
  76 }
  77
  78 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  79 {
  80         const source_position_t *pos = (const source_position_t*) dbg;
  81         if(pos == NULL)
  82                 return NULL;
  83         if(line != NULL)
  84                 *line = pos->linenr;
  85         return pos->input_name;
  86 }
  87
  88 void init_ast2firm(void)
  89 {
  90         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  91         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
  92         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
  93
  94         ir_type_int        = get_ir_type(type_int);
  95         ir_type_const_char = get_ir_type(type_const_char);
  96         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  97                                                        type in firm */
  98         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
  99                                               ir_type_void, mode_P_data);
 100
 101         type_void->firm_type = ir_type_void;
 102
 103         symbol_alloca = symbol_table_insert("__builtin_alloca");
 104 }
 105
 106 void exit_ast2firm(void)
 107 {
 108 }
 109
 110 static unsigned unique_id = 0;
 111
 112 static ident *unique_ident(const char *tag)
 113 {
 114         char buf[256];
 115
 116         snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
 117         unique_id++;
 118         return new_id_from_str(buf);
 119 }
 120
 121 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 122 {
 123         switch(atomic_type->atype) {
 124         case ATOMIC_TYPE_SCHAR:
 125         case ATOMIC_TYPE_CHAR:
 126                 return mode_Bs;
 127         case ATOMIC_TYPE_UCHAR:
 128                 return mode_Bu;
 129         case ATOMIC_TYPE_SHORT:
 130                 return mode_Hs;
 131         case ATOMIC_TYPE_USHORT:
 132                 return mode_Hu;
 133         case ATOMIC_TYPE_LONG:
 134         case ATOMIC_TYPE_INT:
 135                 return mode_Is;
 136         case ATOMIC_TYPE_ULONG:
 137         case ATOMIC_TYPE_UINT:
 138                 return mode_Iu;
 139         case ATOMIC_TYPE_LONGLONG:
 140                 return mode_Ls;
 141         case ATOMIC_TYPE_ULONGLONG:
 142                 return mode_Lu;
 143         case ATOMIC_TYPE_FLOAT:
 144                 return mode_F;
 145         case ATOMIC_TYPE_DOUBLE:
 146                 return mode_D;
 147         case ATOMIC_TYPE_LONG_DOUBLE:
 148                 return mode_E;
 149         case ATOMIC_TYPE_BOOL:
 150                 return mode_b;
 151 #ifdef PROVIDE_COMPLEX
 152         case ATOMIC_TYPE_FLOAT_COMPLEX:
 153         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 154         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 155                 panic("complex lowering not implemented yet");
 156                 break;
 157         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 158         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 159         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 160                 panic("imaginary lowering not implemented yet");
 161                 break;
 162 #endif
 163         case ATOMIC_TYPE_VOID:
 164                 /* firm has no real void... */
 165                 return mode_Is;
 166         case ATOMIC_TYPE_INVALID:
 167                 break;
 168         }
 169         panic("Encountered unknown atomic type");
 170 }
 171
 172
 173 static unsigned get_type_size(type_t *type);
 174
 175 static unsigned get_atomic_type_size(const atomic_type_t *type)
 176 {
 177         switch(type->atype) {
 178         case ATOMIC_TYPE_CHAR:
 179         case ATOMIC_TYPE_SCHAR:
 180         case ATOMIC_TYPE_UCHAR:
 181                 return 1;
 182
 183         case ATOMIC_TYPE_SHORT:
 184         case ATOMIC_TYPE_USHORT:
 185                 return 2;
 186
 187         case ATOMIC_TYPE_BOOL:
 188         case ATOMIC_TYPE_INT:
 189         case ATOMIC_TYPE_UINT:
 190         case ATOMIC_TYPE_LONG:
 191         case ATOMIC_TYPE_ULONG:
 192         case ATOMIC_TYPE_FLOAT:
 193                 return 4;
 194
 195         case ATOMIC_TYPE_LONGLONG:
 196         case ATOMIC_TYPE_ULONGLONG:
 197         case ATOMIC_TYPE_DOUBLE:
 198                 return 8;
 199
 200         case ATOMIC_TYPE_LONG_DOUBLE:
 201                 return 12;
 202
 203         case ATOMIC_TYPE_VOID:
 204                 return 1;
 205
 206         case ATOMIC_TYPE_INVALID:
 207                 break;
 208         }
 209         panic("Trying to determine size of invalid atomic type");
 210 }
 211
 212 static unsigned get_compound_type_size(compound_type_t *type)
 213 {
 214         ir_type *irtype = get_ir_type(&type->type);
 215         return get_type_size_bytes(irtype);
 216 }
 217
 218 static unsigned get_array_type_size(array_type_t *type)
 219 {
 220         ir_type *irtype = get_ir_type(&type->type);
 221         return get_type_size_bytes(irtype);
 222 }
 223
 224 static unsigned get_type_size(type_t *type)
 225 {
 226         type = skip_typeref(type);
 227
 228         switch(type->type) {
 229         case TYPE_ATOMIC:
 230                 return get_atomic_type_size((const atomic_type_t*) type);
 231         case TYPE_ENUM:
 232                 return get_mode_size_bytes(mode_Is);
 233         case TYPE_COMPOUND_UNION:
 234         case TYPE_COMPOUND_STRUCT:
 235                 return get_compound_type_size((compound_type_t*) type);
 236         case TYPE_FUNCTION:
 237                 /* just a pointer to the function */
 238                 return get_mode_size_bytes(mode_P_code);
 239         case TYPE_POINTER:
 240                 return get_mode_size_bytes(mode_P_data);
 241         case TYPE_ARRAY:
 242                 return get_array_type_size((array_type_t*) type);
 243         case TYPE_BUILTIN:
 244         case TYPE_TYPEDEF:
 245         case TYPE_TYPEOF:
 246         case TYPE_INVALID:
 247                 break;
 248         }
 249         panic("Trying to determine size of invalid type");
 250 }
 251
 252 static unsigned count_parameters(const function_type_t *function_type)
 253 {
 254         unsigned count = 0;
 255
 256         function_parameter_t *parameter = function_type->parameters;
 257         for ( ; parameter != NULL; parameter = parameter->next) {
 258                 ++count;
 259         }
 260
 261         return count;
 262 }
 263
 264
 265
 266
 267 static long fold_constant(const expression_t *expression);
 268
 269 static ir_type *create_atomic_type(const atomic_type_t *type)
 270 {
 271         ir_mode *mode   = get_atomic_mode(type);
 272         ident   *id     = get_mode_ident(mode);
 273         ir_type *irtype = new_type_primitive(id, mode);
 274
 275         return irtype;
 276 }
 277
 278 static ir_type *create_method_type(const function_type_t *function_type)
 279 {
 280         type_t  *result_type  = function_type->result_type;
 281
 282         ident   *id           = unique_ident("functiontype");
 283         int      n_parameters = count_parameters(function_type);
 284         int      n_results    = result_type == type_void ? 0 : 1;
 285         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 286
 287         if(result_type != type_void) {
 288                 ir_type *restype = get_ir_type(result_type);
 289                 set_method_res_type(irtype, 0, restype);
 290         }
 291
 292         function_parameter_t *parameter = function_type->parameters;
 293         int                   n         = 0;
 294         for( ; parameter != NULL; parameter = parameter->next) {
 295                 ir_type *p_irtype = get_ir_type(parameter->type);
 296                 set_method_param_type(irtype, n, p_irtype);
 297                 ++n;
 298         }
 299
 300         if(function_type->variadic || function_type->unspecified_parameters) {
 301                 set_method_variadicity(irtype, variadicity_variadic);
 302         }
 303
 304         return irtype;
 305 }
 306
 307 static ir_type *create_pointer_type(pointer_type_t *type)
 308 {
 309         type_t  *points_to = type->points_to;
 310         ir_type *ir_points_to;
 311         /* Avoid endless recursion if the points_to type contains this poiner type
 312          * again (might be a struct). We therefore first create a void* pointer
 313          * and then set the real points_to type
 314          */
 315         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 316                                             ir_type_void, mode_P_data);
 317         type->type.firm_type  = ir_type;
 318
 319         ir_points_to = get_ir_type(points_to);
 320         set_pointer_points_to_type(ir_type, ir_points_to);
 321
 322         return ir_type;
 323 }
 324
 325 static ir_type *create_array_type(array_type_t *type)
 326 {
 327         type_t  *element_type    = type->element_type;
 328         ir_type *ir_element_type = get_ir_type(element_type);
 329
 330         ident   *id      = unique_ident("array");
 331         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 332
 333         if(type->size != NULL) {
 334                 int n_elements = fold_constant(type->size);
 335
 336                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 337
 338                 size_t elemsize = get_type_size_bytes(ir_element_type);
 339                 int align = get_type_alignment_bytes(ir_element_type);
 340                 if(elemsize % align > 0) {
 341                         elemsize += align - (elemsize % align);
 342                 }
 343                 set_type_size_bytes(ir_type, n_elements * elemsize);
 344                 set_type_alignment_bytes(ir_type, align);
 345                 set_type_state(ir_type, layout_fixed);
 346         }
 347
 348         return ir_type;
 349 }
 350
 351 #define INVALID_TYPE ((ir_type_ptr)-1)
 352
 353 static ir_type *create_struct_type(compound_type_t *type)
 354 {
 355         symbol_t *symbol = type->declaration->symbol;
 356         ident    *id;
 357         if(symbol != NULL) {
 358                 id = unique_ident(symbol->string);
 359         } else {
 360                 id = unique_ident("__anonymous_struct");
 361         }
 362         ir_type *ir_type = new_type_struct(id);
 363
 364         type->type.firm_type = ir_type;
 365
 366         int align_all = 1;
 367         int offset    = 0;
 368         declaration_t *entry = type->declaration->context.declarations;
 369         for( ; entry != NULL; entry = entry->next) {
 370                 if(entry->namespc != NAMESPACE_NORMAL)
 371                         continue;
 372
 373                 ident       *ident         = new_id_from_str(entry->symbol->string);
 374                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 375
 376                 int entry_size      = get_type_size_bytes(entry_ir_type);
 377                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 378                 int misalign        = offset % entry_alignment;
 379                 if (misalign != 0)
 380                         offset += entry_alignment - misalign;
 381
 382                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 383                 set_entity_offset(entity, offset);
 384                 add_struct_member(ir_type, entity);
 385                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 386                 entry->v.entity         = entity;
 387
 388                 offset += entry_size;
 389                 if(entry_alignment > align_all) {
 390                         if(entry_alignment % align_all != 0) {
 391                                 panic("Uneven alignments not supported yet");
 392                         }
 393                         align_all = entry_alignment;
 394                 }
 395         }
 396
 397         int misalign = offset % align_all;
 398         offset += misalign;
 399         set_type_alignment_bytes(ir_type, align_all);
 400         set_type_size_bytes(ir_type, offset);
 401         set_type_state(ir_type, layout_fixed);
 402
 403         return ir_type;
 404 }
 405
 406 static ir_type *create_union_type(compound_type_t *type)
 407 {
 408         declaration_t *declaration = type->declaration;
 409         symbol_t      *symbol      = declaration->symbol;
 410         ident         *id;
 411         if(symbol != NULL) {
 412                 id = unique_ident(symbol->string);
 413         } else {
 414                 id = unique_ident("__anonymous_union");
 415         }
 416         ir_type  *ir_type = new_type_union(id);
 417
 418         type->type.firm_type = ir_type;
 419
 420         int align_all = 1;
 421         int size      = 0;
 422         declaration_t *entry = declaration->context.declarations;
 423         for( ; entry != NULL; entry = entry->next) {
 424                 if(entry->namespc != NAMESPACE_NORMAL)
 425                         continue;
 426
 427                 ident       *ident         = new_id_from_str(entry->symbol->string);
 428                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 429
 430                 int entry_size      = get_type_size_bytes(entry_ir_type);
 431                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 432
 433                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 434                 add_union_member(ir_type, entity);
 435                 set_entity_offset(entity, 0);
 436                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 437                 entry->v.entity         = entity;
 438
 439                 if(entry_size > size) {
 440                         size = entry_size;
 441                 }
 442                 if(entry_alignment > align_all) {
 443                         if(entry_alignment % align_all != 0) {
 444                                 panic("Uneven alignments not supported yet");
 445                         }
 446                         align_all = entry_alignment;
 447                 }
 448         }
 449
 450         set_type_alignment_bytes(ir_type, align_all);
 451         set_type_size_bytes(ir_type, size);
 452         set_type_state(ir_type, layout_fixed);
 453
 454         return ir_type;
 455 }
 456
 457 static ir_type *get_ir_type(type_t *type)
 458 {
 459         assert(type != NULL);
 460
 461         type = skip_typeref(type);
 462
 463         if(type->firm_type != NULL) {
 464                 assert(type->firm_type != INVALID_TYPE);
 465                 return type->firm_type;
 466         }
 467
 468         ir_type *firm_type = NULL;
 469         switch(type->type) {
 470         case TYPE_ATOMIC:
 471                 firm_type = create_atomic_type((atomic_type_t*) type);
 472                 break;
 473         case TYPE_FUNCTION:
 474                 firm_type = create_method_type((function_type_t*) type);
 475                 break;
 476         case TYPE_POINTER:
 477                 firm_type = create_pointer_type((pointer_type_t*) type);
 478                 break;
 479         case TYPE_ARRAY:
 480                 firm_type = create_array_type((array_type_t*) type);
 481                 break;
 482         case TYPE_COMPOUND_STRUCT:
 483                 firm_type = create_struct_type((compound_type_t*) type);
 484                 break;
 485         case TYPE_COMPOUND_UNION:
 486                 firm_type = create_union_type((compound_type_t*) type);
 487                 break;
 488         case TYPE_ENUM:
 489                 firm_type = ir_type_int;
 490                 break;
 491         case TYPE_BUILTIN:
 492         case TYPE_TYPEOF:
 493         case TYPE_TYPEDEF:
 494         case TYPE_INVALID:
 495                 break;
 496         }
 497         if(firm_type == NULL)
 498                 panic("unknown type found");
 499
 500         type->firm_type = firm_type;
 501         return firm_type;
 502 }
 503
 504 static inline ir_mode *get_ir_mode(type_t *type)
 505 {
 506         ir_type *irtype = get_ir_type(type);
 507
 508         /* firm doesn't report a mode for arrays somehow... */
 509         if(is_Array_type(irtype)) {
 510                 return mode_P;
 511         }
 512
 513         ir_mode *mode = get_type_mode(irtype);
 514         assert(mode != NULL);
 515         return mode;
 516 }
 517
 518 static ir_entity* get_function_entity(declaration_t *declaration)
 519 {
 520         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 521                 return declaration->v.entity;
 522         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 523
 524         symbol_t *symbol = declaration->symbol;
 525         ident    *id     = new_id_from_str(symbol->string);
 526
 527         ir_type  *global_type    = get_glob_type();
 528         ir_type  *ir_type_method = get_ir_type(declaration->type);
 529         assert(is_Method_type(ir_type_method));
 530
 531         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 532         set_entity_ld_ident(entity, id);
 533         if(declaration->storage_class == STORAGE_CLASS_STATIC
 534                         || declaration->is_inline) {
 535                 set_entity_visibility(entity, visibility_local);
 536         } else if(declaration->init.statement != NULL) {
 537                 set_entity_visibility(entity, visibility_external_visible);
 538         } else {
 539                 set_entity_visibility(entity, visibility_external_allocated);
 540         }
 541
 542         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 543         declaration->v.entity         = entity;
 544
 545         return entity;
 546 }
 547
 548
 549
 550 static ir_node *expression_to_firm(const expression_t *expression);
 551
 552 static dbg_info *get_dbg_info(const source_position_t *pos)
 553 {
 554         return (dbg_info*) pos;
 555 }
 556
 557 static ir_node *const_to_firm(const const_t *cnst)
 558 {
 559         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 560         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 561
 562         char    buf[128];
 563         tarval *tv;
 564         size_t  len;
 565         if(mode_is_float(mode)) {
 566                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 567         } else {
 568                 if(mode_is_signed(mode)) {
 569                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
 570                 } else {
 571                         len = snprintf(buf, sizeof(buf), "%llu", cnst->v.int_value);
 572                 }
 573                 tv = new_tarval_from_str(buf, len, mode);
 574         }
 575
 576         return new_d_Const(dbgi, mode, tv);
 577 }
 578
 579 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 580 {
 581         assert(entity != NULL);
 582         union symconst_symbol sym;
 583         sym.entity_p = entity;
 584         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 585 }
 586
 587 static ir_node *string_to_firm(const source_position_t *const src_pos,
 588                                const char *const id_prefix,
 589                                const char *const string)
 590 {
 591         ir_type *const global_type = get_glob_type();
 592         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 593                                                     ir_type_const_char);
 594
 595         ident     *const id     = unique_ident(id_prefix);
 596         ir_entity *const entity = new_entity(global_type, id, type);
 597         set_entity_ld_ident(entity, id);
 598         set_entity_variability(entity, variability_constant);
 599
 600         ir_type *const elem_type = ir_type_const_char;
 601         ir_mode *const mode      = get_type_mode(elem_type);
 602
 603         const size_t slen = strlen(string) + 1;
 604
 605         set_array_lower_bound_int(type, 0, 0);
 606         set_array_upper_bound_int(type, 0, slen);
 607         set_type_size_bytes(type, slen);
 608         set_type_state(type, layout_fixed);
 609
 610         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 611         for(size_t i = 0; i < slen; ++i) {
 612                 tvs[i] = new_tarval_from_long(string[i], mode);
 613         }
 614
 615         set_array_entity_values(entity, tvs, slen);
 616         free(tvs);
 617
 618         dbg_info *const dbgi = get_dbg_info(src_pos);
 619
 620         return create_symconst(dbgi, entity);
 621 }
 622
 623 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 624 {
 625         return string_to_firm(&literal->expression.source_position, "Lstr",
 626                               literal->value);
 627 }
 628
 629 static ir_node *deref_address(type_t *const type, ir_node *const addr,
 630                               dbg_info *const dbgi)
 631 {
 632         switch (type->type) {
 633                 case TYPE_ARRAY:
 634                 case TYPE_COMPOUND_STRUCT:
 635                 case TYPE_COMPOUND_UNION:
 636                         return addr;
 637
 638                 default: {
 639                         ir_mode *const mode     = get_ir_mode(type);
 640                         ir_node *const memory   = get_store();
 641                         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
 642                         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 643                         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
 644                         set_store(load_mem);
 645                         return load_res;
 646                 }
 647         }
 648 }
 649
 650 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 651 {
 652         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 653         declaration_t *declaration = ref->declaration;
 654         type_t        *type        = skip_typeref(declaration->type);
 655
 656         switch((declaration_type_t) declaration->declaration_type) {
 657         case DECLARATION_TYPE_UNKNOWN:
 658                 break;
 659         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 660                 ir_mode *mode = get_ir_mode(type);
 661                 return get_value(declaration->v.value_number, mode);
 662         }
 663         case DECLARATION_TYPE_FUNCTION: {
 664                 return create_symconst(dbgi, declaration->v.entity);
 665         }
 666         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 667                 ir_entity *entity   = declaration->v.entity;
 668                 ir_node   *symconst = create_symconst(dbgi, entity);
 669                 return deref_address(type, symconst, dbgi);
 670         }
 671         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 672                 ir_entity *entity = declaration->v.entity;
 673                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 674                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 675                 return deref_address(type, sel, dbgi);
 676         }
 677
 678         case DECLARATION_TYPE_COMPOUND_MEMBER:
 679         case DECLARATION_TYPE_LABEL_BLOCK:
 680                 panic("not implemented reference type");
 681         }
 682
 683         panic("reference to declaration with unknown type found");
 684 }
 685
 686 static ir_node *reference_addr(const reference_expression_t *ref)
 687 {
 688         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 689         declaration_t *declaration = ref->declaration;
 690
 691         switch((declaration_type_t) declaration->declaration_type) {
 692         case DECLARATION_TYPE_UNKNOWN:
 693                 break;
 694         case DECLARATION_TYPE_LOCAL_VARIABLE:
 695                 panic("local variable without entity has no address");
 696         case DECLARATION_TYPE_FUNCTION: {
 697                 return create_symconst(dbgi, declaration->v.entity);
 698         }
 699         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 700                 ir_entity *entity   = declaration->v.entity;
 701                 ir_node   *symconst = create_symconst(dbgi, entity);
 702                 return symconst;
 703         }
 704         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 705                 ir_entity *entity = declaration->v.entity;
 706                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 707                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 708
 709                 return sel;
 710         }
 711         case DECLARATION_TYPE_COMPOUND_MEMBER:
 712         case DECLARATION_TYPE_LABEL_BLOCK:
 713                 panic("not implemented reference type");
 714         }
 715
 716         panic("reference to declaration with unknown type found");
 717 }
 718
 719 static ir_node *process_builtin_call(const call_expression_t *call)
 720 {
 721         dbg_info *dbgi = get_dbg_info(&call->expression.source_position);
 722
 723         assert(call->function->type == EXPR_BUILTIN_SYMBOL);
 724         builtin_symbol_expression_t *builtin
 725                 = (builtin_symbol_expression_t*) call->function;
 726         symbol_t *symbol = builtin->symbol;
 727
 728         if(symbol == symbol_alloca) {
 729                 if(call->arguments == NULL || call->arguments->next != NULL) {
 730                         panic("invalid number of parameters on __builtin_alloca");
 731                 }
 732                 expression_t *argument = call->arguments->expression;
 733                 ir_node      *size     = expression_to_firm(argument);
 734
 735                 ir_node *store  = get_store();
 736                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
 737                                               stack_alloc);
 738                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
 739                 set_store(proj_m);
 740                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
 741
 742                 return res;
 743         } else {
 744                 panic("Unsupported builtin found\n");
 745         }
 746 }
 747
 748 static ir_node *call_expression_to_firm(const call_expression_t *call)
 749 {
 750         assert(get_cur_block() != NULL);
 751
 752         expression_t  *function = call->function;
 753         if(function->type == EXPR_BUILTIN_SYMBOL) {
 754                 return process_builtin_call(call);
 755         }
 756         ir_node       *callee   = expression_to_firm(function);
 757
 758         function_type_t *function_type;
 759         if (function->datatype->type == TYPE_POINTER) {
 760                 pointer_type_t *const ptr_type = (pointer_type_t*)function->datatype;
 761                 assert(ptr_type->points_to->type == TYPE_FUNCTION);
 762                 function_type = (function_type_t*)ptr_type->points_to;
 763         } else {
 764                 assert(function->datatype->type == TYPE_FUNCTION);
 765                 function_type = (function_type_t*)function->datatype;
 766         }
 767
 768         int              n_parameters = 0;
 769         call_argument_t *argument     = call->arguments;
 770         for( ; argument != NULL; argument = argument->next) {
 771                 ++n_parameters;
 772         }
 773
 774         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 775         ir_type *new_method_type = NULL;
 776         if(function_type->variadic || function_type->unspecified_parameters) {
 777                 /* we need to construct a new method type matching the call
 778                  * arguments... */
 779                 int n_res       = get_method_n_ress(ir_method_type);
 780                 new_method_type = new_type_method(unique_ident("calltype"),
 781                                                   n_parameters, n_res);
 782                 set_method_calling_convention(new_method_type,
 783                                get_method_calling_convention(ir_method_type));
 784                 set_method_additional_properties(new_method_type,
 785                                get_method_additional_properties(ir_method_type));
 786
 787                 for(int i = 0; i < n_res; ++i) {
 788                         set_method_res_type(new_method_type, i,
 789                                             get_method_res_type(ir_method_type, i));
 790                 }
 791         }
 792         ir_node *in[n_parameters];
 793
 794         argument = call->arguments;
 795         int n = 0;
 796         for( ; argument != NULL; argument = argument->next) {
 797                 expression_t *expression = argument->expression;
 798                 ir_node      *arg_node   = expression_to_firm(expression);
 799
 800                 in[n] = arg_node;
 801                 if(new_method_type != NULL) {
 802                         ir_type *irtype = get_ir_type(expression->datatype);
 803                         set_method_param_type(new_method_type, n, irtype);
 804                 }
 805
 806                 n++;
 807         }
 808         assert(n == n_parameters);
 809
 810         if(new_method_type != NULL)
 811                 ir_method_type = new_method_type;
 812
 813         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 814         ir_node  *store = get_store();
 815         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 816                                      ir_method_type);
 817         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 818         set_store(mem);
 819
 820         type_t  *result_type = function_type->result_type;
 821         ir_node *result      = NULL;
 822         if(result_type != type_void) {
 823                 ir_mode *mode    = get_ir_mode(result_type);
 824                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 825                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 826         }
 827
 828         return result;
 829 }
 830
 831 static ir_node *expression_to_addr(const expression_t *expression);
 832 static void create_condition_evaluation(const expression_t *expression,
 833                                         ir_node *true_block,
 834                                         ir_node *false_block);
 835
 836 static void set_value_for_expression(const expression_t *expression,
 837                                      ir_node *value)
 838 {
 839         if(expression->type == EXPR_REFERENCE) {
 840                 reference_expression_t *ref = (reference_expression_t*) expression;
 841
 842                 declaration_t *declaration = ref->declaration;
 843                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 844                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 845                         set_value(declaration->v.value_number, value);
 846                         return;
 847                 }
 848         }
 849
 850         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 851         ir_node  *addr      = expression_to_addr(expression);
 852         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 853         ir_node  *memory    = get_store();
 854         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 855         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 856         set_store(store_mem);
 857 }
 858
 859 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 860 {
 861         ir_mode *value_mode = get_irn_mode(value);
 862
 863         if (value_mode == dest_mode || is_Bad(value))
 864                 return value;
 865
 866         if(dest_mode == mode_b) {
 867                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 868                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 869                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 870                 return proj;
 871         }
 872
 873         return new_d_Conv(dbgi, value, dest_mode);
 874 }
 875
 876 static ir_node *create_incdec(const unary_expression_t *expression)
 877 {
 878         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
 879         type_t       *type  = expression->expression.datatype;
 880         ir_mode      *mode  = get_ir_mode(type);
 881         expression_t *value = expression->value;
 882
 883         ir_node *value_node = expression_to_firm(value);
 884
 885         ir_node *offset;
 886         if(type->type == TYPE_POINTER) {
 887                 pointer_type_t *pointer_type = (pointer_type_t*) type;
 888                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
 889                 offset = new_Const_long(mode_Is, elem_size);
 890         } else {
 891                 assert(is_type_arithmetic(type));
 892                 offset = new_Const(mode, get_mode_one(mode));
 893         }
 894
 895         ir_node *new_value;
 896         switch(expression->type) {
 897         case UNEXPR_POSTFIX_INCREMENT: {
 898                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 899                 set_value_for_expression(value, new_value);
 900                 return value_node;
 901         }
 902         case UNEXPR_POSTFIX_DECREMENT: {
 903                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 904                 set_value_for_expression(value, new_value);
 905                 return value_node;
 906         }
 907         case UNEXPR_PREFIX_INCREMENT: {
 908                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 909                 set_value_for_expression(value, new_value);
 910                 return new_value;
 911         }
 912         case UNEXPR_PREFIX_DECREMENT: {
 913                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 914                 set_value_for_expression(value, new_value);
 915                 return new_value;
 916         }
 917         default:
 918                 panic("no incdec expr in create_incdec");
 919         }
 920
 921         return new_value;
 922 }
 923
 924 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 925 {
 926         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 927         type_t   *type = expression->expression.datatype;
 928
 929         if(expression->type == UNEXPR_TAKE_ADDRESS)
 930                 return expression_to_addr(expression->value);
 931
 932         const expression_t *value      = expression->value;
 933         ir_node            *value_node = expression_to_firm(value);
 934
 935         switch(expression->type) {
 936         case UNEXPR_NEGATE:
 937                 return new_d_Minus(dbgi, value_node, get_ir_mode(type));
 938         case UNEXPR_PLUS:
 939                 return value_node;
 940         case UNEXPR_BITWISE_NEGATE:
 941                 return new_d_Not(dbgi, value_node, get_ir_mode(type));
 942         case UNEXPR_NOT: {
 943                 if(get_irn_mode(value_node) != mode_b) {
 944                         value_node = create_conv(dbgi, value_node, mode_b);
 945                 }
 946                 value_node = new_d_Not(dbgi, value_node, mode_b);
 947                 ir_mode *const mode = get_ir_mode(type);
 948                 if(mode != mode_b) {
 949                         value_node = create_conv(dbgi, value_node, mode);
 950                 }
 951                 return value_node;
 952         }
 953         case UNEXPR_DEREFERENCE:
 954                 return deref_address(type, value_node, dbgi);
 955         case UNEXPR_POSTFIX_INCREMENT:
 956         case UNEXPR_POSTFIX_DECREMENT:
 957         case UNEXPR_PREFIX_INCREMENT:
 958         case UNEXPR_PREFIX_DECREMENT:
 959                 return create_incdec(expression);
 960         case UNEXPR_CAST:
 961                 return create_conv(dbgi, value_node, get_ir_mode(type));
 962
 963         case UNEXPR_TAKE_ADDRESS:
 964         case UNEXPR_INVALID:
 965                 break;
 966         }
 967         panic("invalid UNEXPR type found");
 968 }
 969
 970 static long get_pnc(binary_expression_type_t type)
 971 {
 972         switch(type) {
 973         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 974         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 975         case BINEXPR_LESS:         return pn_Cmp_Lt;
 976         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 977         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 978         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 979         default:
 980                 break;
 981         }
 982         panic("trying to get pn_Cmp from non-comparison binexpr type");
 983 }
 984
 985 static ir_node *create_lazy_op(const binary_expression_t *expression)
 986 {
 987         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 988         type_t   *type = expression->expression.datatype;
 989         ir_mode  *mode = get_ir_mode(type);
 990
 991         ir_node *cur_block = get_cur_block();
 992
 993         ir_node *one_block = new_immBlock();
 994         ir_node *one       = new_Const(mode, get_mode_one(mode));
 995         ir_node *jmp_one   = new_d_Jmp(dbgi);
 996
 997         ir_node *zero_block = new_immBlock();
 998         ir_node *zero       = new_Const(mode, get_mode_null(mode));
 999         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1000
1001         set_cur_block(cur_block);
1002         create_condition_evaluation((const expression_t*) expression,
1003                                     one_block, zero_block);
1004         mature_immBlock(one_block);
1005         mature_immBlock(zero_block);
1006
1007         ir_node *common_block = new_immBlock();
1008         add_immBlock_pred(common_block, jmp_one);
1009         add_immBlock_pred(common_block, jmp_zero);
1010         mature_immBlock(common_block);
1011
1012         ir_node *in[2] = { one, zero };
1013         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1014
1015         return val;
1016 }
1017
1018 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1019                                             ir_node *right, ir_mode *mode);
1020
1021 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1022                                         create_arithmetic_func func)
1023 {
1024         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1025         ir_node  *left  = expression_to_firm(expression->left);
1026         ir_node  *right = expression_to_firm(expression->right);
1027         type_t   *type  = expression->right->datatype;
1028         /* be careful with the modes, because in arithmetic assign nodes only
1029          * the right operand has the mode of the arithmetic already */
1030         ir_mode  *mode  = get_ir_mode(type);
1031         left            = create_conv(dbgi, left, mode);
1032         ir_node  *res   = func(dbgi, left, right, mode);
1033
1034         return res;
1035 }
1036
1037 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1038                                    ir_node  *      integer,
1039                                    type_t   *const type,
1040                                    dbg_info *const dbgi,
1041                                    const create_arithmetic_func func)
1042 {
1043         pointer_type_t *const pointer_type = (pointer_type_t*)type;
1044         type_t         *const points_to    = pointer_type->points_to;
1045         const unsigned        elem_size    = get_type_size(points_to);
1046
1047         assert(elem_size >= 1);
1048         if (elem_size > 1) {
1049                 integer             = create_conv(dbgi, integer, mode_Is);
1050                 ir_node *const cnst = new_Const_long(mode_Is, (long)elem_size);
1051                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
1052                 integer = mul;
1053         }
1054
1055         ir_mode *const mode = get_ir_mode(type);
1056         return func(dbgi, pointer, integer, mode);
1057 }
1058
1059 static ir_node *create_arithmetic_assign_binop(
1060                 const binary_expression_t *expression, create_arithmetic_func func)
1061 {
1062         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1063         type_t   *const type = expression->expression.datatype;
1064         ir_node  *value;
1065
1066         if (type->type == TYPE_POINTER) {
1067                 ir_node        *const pointer = expression_to_firm(expression->left);
1068                 ir_node        *      integer = expression_to_firm(expression->right);
1069                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1070         } else {
1071                 value = create_arithmetic_binop(expression, func);
1072         }
1073
1074         ir_mode  *const mode = get_ir_mode(type);
1075         value = create_conv(dbgi, value, mode);
1076         set_value_for_expression(expression->left, value);
1077
1078         return value;
1079 }
1080
1081 static ir_node *create_add(const binary_expression_t *expression)
1082 {
1083         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1084         ir_node  *left  = expression_to_firm(expression->left);
1085         ir_node  *right = expression_to_firm(expression->right);
1086         type_t   *type  = expression->expression.datatype;
1087
1088         expression_t *expr_left  = expression->left;
1089         expression_t *expr_right = expression->right;
1090         type_t       *type_left  = skip_typeref(expr_left->datatype);
1091         type_t       *type_right = skip_typeref(expr_right->datatype);
1092
1093         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1094                 ir_mode *const mode = get_ir_mode(type);
1095                 return new_d_Add(dbgi, left, right, mode);
1096         }
1097
1098         if (type_left->type == TYPE_POINTER || type_left->type == TYPE_ARRAY) {
1099                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1100         } else {
1101                 assert(type_right->type == TYPE_POINTER || type_right->type == TYPE_ARRAY);
1102                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1103         }
1104 }
1105
1106 static ir_node *create_sub(const binary_expression_t *expression)
1107 {
1108         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1109         expression_t *const expr_left  = expression->left;
1110         expression_t *const expr_right = expression->right;
1111         ir_node      *const left       = expression_to_firm(expr_left);
1112         ir_node      *const right      = expression_to_firm(expr_right);
1113         type_t       *const type       = expression->expression.datatype;
1114         type_t       *const type_left  = skip_typeref(expr_left->datatype);
1115         type_t       *const type_right = skip_typeref(expr_right->datatype);
1116
1117         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1118                 ir_mode *const mode = get_ir_mode(type);
1119                 return new_d_Sub(dbgi, left, right, mode);
1120         } else if (type_left->type == TYPE_POINTER && type_right->type == TYPE_POINTER) {
1121                 const pointer_type_t *const ptr_type = (const pointer_type_t*)type_left;
1122                 const unsigned elem_size             = get_type_size(ptr_type->points_to);
1123                 ir_mode *const mode   = get_ir_mode(type);
1124                 ir_node *const sub    = new_d_Sub(dbgi, left, right, mode);
1125                 ir_node *const cnst   = new_Const_long(mode_Is, (long)elem_size);
1126                 ir_node *const no_mem = new_NoMem();
1127                 ir_node *const div    = new_d_Div(dbgi, no_mem, sub, cnst, mode,
1128                                                   op_pin_state_floats);
1129                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
1130         }
1131
1132         assert(type_left->type == TYPE_POINTER);
1133         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1134 }
1135
1136 static ir_node *create_shift(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         type_t   *type  = expression->expression.datatype;
1142         ir_mode  *mode  = get_ir_mode(type);
1143
1144         /* firm always wants the shift count to be unsigned */
1145         right = create_conv(dbgi, right, mode_Iu);
1146
1147         ir_node *res;
1148
1149         switch(expression->type) {
1150         case BINEXPR_SHIFTLEFT:
1151                 res = new_d_Shl(dbgi, left, right, mode);
1152                 break;
1153         case BINEXPR_SHIFTRIGHT: {
1154                  expression_t *expr_left = expression->left;
1155                  type_t       *type_left = skip_typeref(expr_left->datatype);
1156
1157                  if(is_type_signed(type_left)) {
1158                         res = new_d_Shrs(dbgi, left, right, mode);
1159                  } else {
1160                          res = new_d_Shr(dbgi, left, right, mode);
1161                  }
1162                  break;
1163         }
1164         default:
1165                 panic("create shift op called for non-shift op");
1166         }
1167
1168         return res;
1169 }
1170
1171
1172 static ir_node *create_divmod(const binary_expression_t *expression)
1173 {
1174         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1175         ir_node  *left  = expression_to_firm(expression->left);
1176         ir_node  *right = expression_to_firm(expression->right);
1177         ir_node  *pin   = new_Pin(new_NoMem());
1178         type_t   *type  = expression->expression.datatype;
1179         ir_mode  *mode  = get_ir_mode(type);
1180         ir_node  *op;
1181         ir_node  *res;
1182
1183         switch (expression->type)  {
1184                 case BINEXPR_DIV:
1185                 case BINEXPR_DIV_ASSIGN:
1186                         if(mode_is_float(mode)) {
1187                                 op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1188                                 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1189                         } else {
1190                                 op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1191                                 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1192                         }
1193                         break;
1194
1195                 case BINEXPR_MOD:
1196                 case BINEXPR_MOD_ASSIGN:
1197                         assert(!mode_is_float(mode));
1198                         op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1199                         res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1200                         break;
1201
1202                 default: panic("unexpected binary expression type in create_divmod()");
1203         }
1204
1205         return res;
1206 }
1207
1208 static ir_node *create_arithmetic_assign_divmod(
1209                 const binary_expression_t *expression)
1210 {
1211         ir_node  *      value = create_divmod(expression);
1212         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1213         type_t   *const type  = expression->expression.datatype;
1214         ir_mode  *const mode  = get_ir_mode(type);
1215
1216         assert(type->type != TYPE_POINTER);
1217
1218         value = create_conv(dbgi, value, mode);
1219         set_value_for_expression(expression->left, value);
1220
1221         return value;
1222 }
1223
1224
1225 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1226 {
1227         binary_expression_type_t type = expression->type;
1228         switch(type) {
1229         case BINEXPR_EQUAL:
1230         case BINEXPR_NOTEQUAL:
1231         case BINEXPR_LESS:
1232         case BINEXPR_LESSEQUAL:
1233         case BINEXPR_GREATER:
1234         case BINEXPR_GREATEREQUAL: {
1235                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1236                 ir_node *left  = expression_to_firm(expression->left);
1237                 ir_node *right = expression_to_firm(expression->right);
1238                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1239                 long     pnc   = get_pnc(type);
1240                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1241                 return proj;
1242         }
1243         case BINEXPR_ASSIGN: {
1244                 ir_node *right = expression_to_firm(expression->right);
1245                 set_value_for_expression(expression->left, right);
1246                 return right;
1247         }
1248         case BINEXPR_ADD:
1249                 return create_add(expression);
1250         case BINEXPR_SUB:
1251                 return create_sub(expression);
1252         case BINEXPR_MUL:
1253                 return create_arithmetic_binop(expression, new_d_Mul);
1254         case BINEXPR_BITWISE_AND:
1255                 return create_arithmetic_binop(expression, new_d_And);
1256         case BINEXPR_BITWISE_OR:
1257                 return create_arithmetic_binop(expression, new_d_Or);
1258         case BINEXPR_BITWISE_XOR:
1259                 return create_arithmetic_binop(expression, new_d_Eor);
1260         case BINEXPR_SHIFTLEFT:
1261         case BINEXPR_SHIFTRIGHT:
1262                 return create_shift(expression);
1263         case BINEXPR_DIV:
1264         case BINEXPR_MOD:
1265                 return create_divmod(expression);
1266         case BINEXPR_LOGICAL_AND:
1267         case BINEXPR_LOGICAL_OR:
1268                 return create_lazy_op(expression);
1269         case BINEXPR_COMMA:
1270                 expression_to_firm(expression->left);
1271                 return expression_to_firm(expression->right);
1272         case BINEXPR_ADD_ASSIGN:
1273                 return create_arithmetic_assign_binop(expression, new_d_Add);
1274         case BINEXPR_SUB_ASSIGN:
1275                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1276         case BINEXPR_MUL_ASSIGN:
1277                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1278         case BINEXPR_DIV_ASSIGN:
1279                 return create_arithmetic_assign_divmod(expression);
1280         case BINEXPR_BITWISE_AND_ASSIGN:
1281                 return create_arithmetic_assign_binop(expression, new_d_And);
1282         case BINEXPR_BITWISE_OR_ASSIGN:
1283                 return create_arithmetic_assign_binop(expression, new_d_Or);
1284         case BINEXPR_BITWISE_XOR_ASSIGN:
1285                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1286         case BINEXPR_SHIFTLEFT_ASSIGN:
1287                 return create_arithmetic_assign_binop(expression, new_d_Shl);
1288         case BINEXPR_SHIFTRIGHT_ASSIGN:
1289                 return create_arithmetic_assign_binop(expression, new_d_Shr);
1290         default:
1291                 panic("TODO binexpr type");
1292         }
1293 }
1294
1295 static ir_node *array_access_addr(const array_access_expression_t *expression)
1296 {
1297         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1298         ir_node  *base_addr;
1299         ir_node  *offset;
1300
1301         type_t   *type_left  = skip_typeref(expression->array_ref->datatype);
1302         type_t   *type_right = skip_typeref(expression->index->datatype);
1303
1304         if(type_left->type == TYPE_POINTER || type_left->type == TYPE_ARRAY) {
1305                 base_addr = expression_to_firm(expression->array_ref);
1306                 offset    = expression_to_firm(expression->index);
1307         } else {
1308                 assert(type_right->type == TYPE_POINTER
1309                                 || type_right->type == TYPE_ARRAY);
1310                 base_addr = expression_to_firm(expression->index);
1311                 offset    = expression_to_firm(expression->array_ref);
1312         }
1313         offset    = create_conv(dbgi, offset, mode_Iu);
1314
1315         unsigned elem_size       = get_type_size(expression->expression.datatype);
1316         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1317         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1318                                              mode_Iu);
1319         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1320
1321         return result;
1322 }
1323
1324 static ir_node *array_access_to_firm(
1325                 const array_access_expression_t *expression)
1326 {
1327         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1328         ir_node  *addr = array_access_addr(expression);
1329         type_t   *type = skip_typeref(expression->expression.datatype);
1330         return deref_address(type, addr, dbgi);
1331 }
1332
1333 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1334 {
1335         type_t *type = expression->type;
1336         if(type == NULL) {
1337                 type = expression->size_expression->datatype;
1338                 assert(type != NULL);
1339         }
1340
1341         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1342         unsigned  size      = get_type_size(type);
1343         ir_node  *size_node = new_Const_long(mode, size);
1344
1345         return size_node;
1346 }
1347
1348 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1349 {
1350         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1351
1352         ir_node *cur_block   = get_cur_block();
1353
1354         /* create the true block */
1355         ir_node *true_block  = new_immBlock();
1356
1357         ir_node *true_val = expression_to_firm(expression->true_expression);
1358         ir_node *true_jmp = new_Jmp();
1359
1360         /* create the false block */
1361         ir_node *false_block = new_immBlock();
1362
1363         ir_node *false_val = expression_to_firm(expression->false_expression);
1364         ir_node *false_jmp = new_Jmp();
1365
1366         /* create the condition evaluation */
1367         set_cur_block(cur_block);
1368         create_condition_evaluation(expression->condition, true_block, false_block);
1369         mature_immBlock(true_block);
1370         mature_immBlock(false_block);
1371
1372         /* create the common block */
1373         ir_node *common_block = new_immBlock();
1374         add_immBlock_pred(common_block, true_jmp);
1375         add_immBlock_pred(common_block, false_jmp);
1376         mature_immBlock(common_block);
1377
1378         /* TODO improve static semantics, so either both or no values are NULL */
1379         if (true_val == NULL || false_val == NULL) return NULL;
1380
1381         ir_node *in[2] = { true_val, false_val };
1382         ir_mode *mode  = get_irn_mode(true_val);
1383         assert(get_irn_mode(false_val) == mode);
1384         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1385
1386         return val;
1387 }
1388
1389 static ir_node *select_addr(const select_expression_t *expression)
1390 {
1391         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1392
1393         ir_node *compound_addr = expression_to_firm(expression->compound);
1394
1395         declaration_t *entry = expression->compound_entry;
1396         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1397         ir_entity     *entity = entry->v.entity;
1398
1399         assert(entity != NULL);
1400
1401         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1402
1403         return sel;
1404 }
1405
1406 static ir_node *select_to_firm(const select_expression_t *expression)
1407 {
1408         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1409         ir_node  *addr = select_addr(expression);
1410         type_t   *type = skip_typeref(expression->expression.datatype);
1411         return deref_address(type, addr, dbgi);
1412 }
1413
1414 /* Values returned by __builtin_classify_type. */
1415 typedef enum gcc_type_class
1416 {
1417         no_type_class = -1,
1418         void_type_class,
1419         integer_type_class,
1420         char_type_class,
1421         enumeral_type_class,
1422         boolean_type_class,
1423         pointer_type_class,
1424         reference_type_class,
1425         offset_type_class,
1426         real_type_class,
1427         complex_type_class,
1428         function_type_class,
1429         method_type_class,
1430         record_type_class,
1431         union_type_class,
1432         array_type_class,
1433         string_type_class,
1434         set_type_class,
1435         file_type_class,
1436         lang_type_class
1437 } gcc_type_class;
1438
1439 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
1440 {
1441         const type_t *const type = expr->type_expression->datatype;
1442
1443         gcc_type_class tc;
1444         switch (type->type)
1445         {
1446                 case TYPE_ATOMIC: {
1447                         const atomic_type_t *const atomic_type = (const atomic_type_t*)type;
1448                         switch (atomic_type->atype) {
1449                                 // should not be reached
1450                                 case ATOMIC_TYPE_INVALID:
1451                                         tc = no_type_class;
1452                                         break;
1453
1454                                 // gcc cannot do that
1455                                 case ATOMIC_TYPE_VOID:
1456                                         tc = void_type_class;
1457                                         break;
1458
1459                                 case ATOMIC_TYPE_CHAR:      // gcc handles this as integer
1460                                 case ATOMIC_TYPE_SCHAR:     // gcc handles this as integer
1461                                 case ATOMIC_TYPE_UCHAR:     // gcc handles this as integer
1462                                 case ATOMIC_TYPE_SHORT:
1463                                 case ATOMIC_TYPE_USHORT:
1464                                 case ATOMIC_TYPE_INT:
1465                                 case ATOMIC_TYPE_UINT:
1466                                 case ATOMIC_TYPE_LONG:
1467                                 case ATOMIC_TYPE_ULONG:
1468                                 case ATOMIC_TYPE_LONGLONG:
1469                                 case ATOMIC_TYPE_ULONGLONG:
1470                                 case ATOMIC_TYPE_BOOL:      // gcc handles this as integer
1471                                         tc = integer_type_class;
1472                                         break;
1473
1474                                 case ATOMIC_TYPE_FLOAT:
1475                                 case ATOMIC_TYPE_DOUBLE:
1476                                 case ATOMIC_TYPE_LONG_DOUBLE:
1477                                         tc = real_type_class;
1478                                         break;
1479
1480 #ifdef PROVIDE_COMPLEX
1481                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
1482                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
1483                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
1484                                         tc = complex_type_class;
1485                                         break;
1486                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
1487                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
1488                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
1489                                         tc = complex_type_class;
1490                                         break;
1491 #endif
1492
1493                                 default:
1494                                         panic("Unimplemented case in classify_type_to_firm().");
1495                         }
1496                         break;
1497                 }
1498
1499                 case TYPE_ARRAY:           // gcc handles this as pointer
1500                 case TYPE_FUNCTION:        // gcc handles this as pointer
1501                 case TYPE_POINTER:         tc = pointer_type_class; break;
1502                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
1503                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
1504
1505                 // gcc handles this as integer
1506                 case TYPE_ENUM:            tc = integer_type_class; break;
1507
1508                 default:
1509                         panic("Unimplemented case in classify_type_to_firm().");
1510         }
1511
1512         dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
1513         ir_mode  *const mode = mode_Is;
1514         tarval   *const tv   = new_tarval_from_long(tc, mode);
1515         return new_d_Const(dbgi, mode, tv);
1516 }
1517
1518 static ir_node *function_name_to_firm(const string_literal_t *const expr)
1519 {
1520         if (current_function_name == NULL) {
1521                 const source_position_t *const src_pos =
1522                         &expr->expression.source_position;
1523                 const char *const name = current_function_decl->symbol->string;
1524                 current_function_name = string_to_firm(src_pos, "__func__", name);
1525         }
1526
1527         return current_function_name;
1528 }
1529
1530 static ir_node *dereference_addr(const unary_expression_t *const expression)
1531 {
1532         assert(expression->type == UNEXPR_DEREFERENCE);
1533         return expression_to_firm(expression->value);
1534 }
1535
1536 static ir_node *expression_to_addr(const expression_t *expression)
1537 {
1538         switch(expression->type) {
1539         case EXPR_REFERENCE:
1540                 return reference_addr((const reference_expression_t*) expression);
1541         case EXPR_ARRAY_ACCESS:
1542                 return array_access_addr((const array_access_expression_t*) expression);
1543         case EXPR_SELECT:
1544                 return select_addr((const select_expression_t*) expression);
1545         case EXPR_UNARY: {
1546                 const unary_expression_t *const unary_expr =
1547                         (const unary_expression_t*)expression;
1548                 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1549                         return dereference_addr(unary_expr);
1550                 }
1551                 break;
1552         }
1553         default:
1554                 break;
1555         }
1556         panic("trying to get address of non-lvalue");
1557 }
1558
1559 static ir_node *_expression_to_firm(const expression_t *expression)
1560 {
1561         switch(expression->type) {
1562         case EXPR_CONST:
1563                 return const_to_firm((const const_t*) expression);
1564         case EXPR_STRING_LITERAL:
1565                 return string_literal_to_firm((const string_literal_t*) expression);
1566         case EXPR_REFERENCE:
1567                 return reference_expression_to_firm(
1568                                 (const reference_expression_t*) expression);
1569         case EXPR_CALL:
1570                 return call_expression_to_firm((const call_expression_t*) expression);
1571         case EXPR_UNARY:
1572                 return unary_expression_to_firm((const unary_expression_t*) expression);
1573         case EXPR_BINARY:
1574                 return binary_expression_to_firm(
1575                                 (const binary_expression_t*) expression);
1576         case EXPR_ARRAY_ACCESS:
1577                 return array_access_to_firm(
1578                                 (const array_access_expression_t*) expression);
1579         case EXPR_SIZEOF:
1580                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1581         case EXPR_CONDITIONAL:
1582                 return conditional_to_firm((const conditional_expression_t*)expression);
1583         case EXPR_SELECT:
1584                 return select_to_firm((const select_expression_t*) expression);
1585         case EXPR_CLASSIFY_TYPE:
1586                 return classify_type_to_firm((const classify_type_expression_t*)expression);
1587         case EXPR_FUNCTION:
1588         case EXPR_PRETTY_FUNCTION:
1589                 return function_name_to_firm((const string_literal_t*)expression);
1590         case EXPR_OFFSETOF:
1591         case EXPR_VA_ARG:
1592         case EXPR_STATEMENT:
1593         case EXPR_BUILTIN_SYMBOL:
1594                 panic("unimplemented expression found");
1595
1596         case EXPR_UNKNOWN:
1597         case EXPR_INVALID:
1598                 break;
1599         }
1600         panic("invalid expression found");
1601 }
1602
1603 static ir_node *expression_to_firm(const expression_t *expression)
1604 {
1605         ir_node *res = _expression_to_firm(expression);
1606
1607         if(res != NULL && get_irn_mode(res) == mode_b) {
1608                 ir_mode *mode = get_ir_mode(expression->datatype);
1609                 res           = create_conv(NULL, res, mode);
1610         }
1611
1612         return res;
1613 }
1614
1615 static ir_node *expression_to_modeb(const expression_t *expression)
1616 {
1617         ir_node *res = _expression_to_firm(expression);
1618         res          = create_conv(NULL, res, mode_b);
1619
1620         return res;
1621 }
1622
1623 /**
1624  * create a short-circuit expression evaluation that tries to construct
1625  * efficient control flow structures for &&, || and ! expressions
1626  */
1627 static void create_condition_evaluation(const expression_t *expression,
1628                                         ir_node *true_block,
1629                                         ir_node *false_block)
1630 {
1631         switch(expression->type) {
1632         case EXPR_UNARY: {
1633                 unary_expression_t *unary_expression = (unary_expression_t*) expression;
1634                 if(unary_expression->type == UNEXPR_NOT) {
1635                         create_condition_evaluation(unary_expression->value, false_block,
1636                                                     true_block);
1637                         return;
1638                 }
1639                 break;
1640         }
1641         case EXPR_BINARY: {
1642                 binary_expression_t *binary_expression
1643                         = (binary_expression_t*) expression;
1644                 if(binary_expression->type == BINEXPR_LOGICAL_AND) {
1645                         ir_node *cur_block   = get_cur_block();
1646                         ir_node *extra_block = new_immBlock();
1647                         set_cur_block(cur_block);
1648                         create_condition_evaluation(binary_expression->left, extra_block,
1649                                                     false_block);
1650                         mature_immBlock(extra_block);
1651                         set_cur_block(extra_block);
1652                         create_condition_evaluation(binary_expression->right, true_block,
1653                                                     false_block);
1654                         return;
1655                 }
1656                 if(binary_expression->type == BINEXPR_LOGICAL_OR) {
1657                         ir_node *cur_block   = get_cur_block();
1658                         ir_node *extra_block = new_immBlock();
1659                         set_cur_block(cur_block);
1660                         create_condition_evaluation(binary_expression->left, true_block,
1661                                                     extra_block);
1662                         mature_immBlock(extra_block);
1663                         set_cur_block(extra_block);
1664                         create_condition_evaluation(binary_expression->right, true_block,
1665                                                     false_block);
1666                         return;
1667                 }
1668                 break;
1669         }
1670         default:
1671                 break;
1672         }
1673
1674         dbg_info *dbgi       = get_dbg_info(&expression->source_position);
1675         ir_node  *condition  = expression_to_modeb(expression);
1676         ir_node  *cond       = new_d_Cond(dbgi, condition);
1677         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1678         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1679
1680         add_immBlock_pred(true_block, true_proj);
1681         add_immBlock_pred(false_block, false_proj);
1682
1683         set_cur_block(NULL);
1684 }
1685
1686 static void statement_to_firm(statement_t *statement);
1687
1688 static void return_statement_to_firm(return_statement_t *statement)
1689 {
1690         if(get_cur_block() == NULL)
1691                 return;
1692
1693         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1694         ir_node  *ret;
1695
1696         if(statement->return_value != NULL) {
1697                 ir_node *retval = expression_to_firm(statement->return_value);
1698                 ir_node *in[1];
1699
1700                 in[0] = retval;
1701                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1702         } else {
1703                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1704         }
1705         ir_node *end_block = get_irg_end_block(current_ir_graph);
1706         add_immBlock_pred(end_block, ret);
1707
1708         set_cur_block(NULL);
1709 }
1710
1711 static void compound_statement_to_firm(compound_statement_t *compound)
1712 {
1713         statement_t *statement = compound->statements;
1714         for( ; statement != NULL; statement = statement->next) {
1715                 //context2firm(&statement->context);
1716                 statement_to_firm(statement);
1717         }
1718 }
1719
1720 static void expression_statement_to_firm(expression_statement_t *statement)
1721 {
1722         if(get_cur_block() == NULL)
1723                 return;
1724
1725         expression_to_firm(statement->expression);
1726 }
1727
1728 static void if_statement_to_firm(if_statement_t *statement)
1729 {
1730         ir_node *cur_block = get_cur_block();
1731
1732         ir_node *fallthrough_block = new_immBlock();
1733
1734         /* the true (blocks) */
1735         ir_node *true_block;
1736         if (statement->true_statement != NULL) {
1737                 true_block = new_immBlock();
1738                 statement_to_firm(statement->true_statement);
1739                 if(get_cur_block() != NULL) {
1740                         ir_node *jmp = new_Jmp();
1741                         add_immBlock_pred(fallthrough_block, jmp);
1742                 }
1743         } else {
1744                 true_block = fallthrough_block;
1745         }
1746
1747         /* the false (blocks) */
1748         ir_node *false_block;
1749         if(statement->false_statement != NULL) {
1750                 false_block = new_immBlock();
1751
1752                 statement_to_firm(statement->false_statement);
1753                 if(get_cur_block() != NULL) {
1754                         ir_node *jmp = new_Jmp();
1755                         add_immBlock_pred(fallthrough_block, jmp);
1756                 }
1757         } else {
1758                 false_block = fallthrough_block;
1759         }
1760
1761         /* create the condition */
1762         if(cur_block != NULL) {
1763                 set_cur_block(cur_block);
1764                 create_condition_evaluation(statement->condition, true_block,
1765                                             false_block);
1766         }
1767
1768         mature_immBlock(true_block);
1769         if(false_block != fallthrough_block) {
1770                 mature_immBlock(false_block);
1771         }
1772         mature_immBlock(fallthrough_block);
1773
1774         set_cur_block(fallthrough_block);
1775 }
1776
1777 static void while_statement_to_firm(while_statement_t *statement)
1778 {
1779         ir_node *jmp = NULL;
1780         if(get_cur_block() != NULL) {
1781                 jmp = new_Jmp();
1782         }
1783
1784         /* create the header block */
1785         ir_node *header_block = new_immBlock();
1786         if(jmp != NULL) {
1787                 add_immBlock_pred(header_block, jmp);
1788         }
1789
1790         /* the false block */
1791         ir_node *false_block = new_immBlock();
1792
1793         /* the loop body */
1794         ir_node *body_block;
1795         if (statement->body != NULL) {
1796                 ir_node *old_continue_label = continue_label;
1797                 ir_node *old_break_label    = break_label;
1798                 continue_label              = header_block;
1799                 break_label                 = false_block;
1800
1801                 body_block = new_immBlock();
1802                 statement_to_firm(statement->body);
1803
1804                 assert(continue_label == header_block);
1805                 assert(break_label    == false_block);
1806                 continue_label = old_continue_label;
1807                 break_label    = old_break_label;
1808
1809                 if(get_cur_block() != NULL) {
1810                         ir_node *jmp = new_Jmp();
1811                         add_immBlock_pred(header_block, jmp);
1812                 }
1813         } else {
1814                 body_block = header_block;
1815         }
1816
1817         /* create the condition */
1818         set_cur_block(header_block);
1819
1820         create_condition_evaluation(statement->condition, body_block, false_block);
1821         mature_immBlock(body_block);
1822         mature_immBlock(false_block);
1823         mature_immBlock(header_block);
1824
1825         set_cur_block(false_block);
1826 }
1827
1828 static void do_while_statement_to_firm(do_while_statement_t *statement)
1829 {
1830         ir_node *jmp = NULL;
1831         if(get_cur_block() != NULL) {
1832                 jmp = new_Jmp();
1833         }
1834
1835         /* create the header block */
1836         ir_node *header_block = new_immBlock();
1837
1838         /* the false block */
1839         ir_node *false_block = new_immBlock();
1840
1841         /* the loop body */
1842         ir_node *body_block = new_immBlock();
1843         if(jmp != NULL) {
1844                 add_immBlock_pred(body_block, jmp);
1845         }
1846
1847         if (statement->body != NULL) {
1848                 ir_node *old_continue_label = continue_label;
1849                 ir_node *old_break_label    = break_label;
1850                 continue_label              = header_block;
1851                 break_label                 = false_block;
1852
1853                 statement_to_firm(statement->body);
1854
1855                 assert(continue_label == header_block);
1856                 assert(break_label    == false_block);
1857                 continue_label = old_continue_label;
1858                 break_label    = old_break_label;
1859
1860                 if (get_cur_block() == NULL) {
1861                         mature_immBlock(header_block);
1862                         mature_immBlock(body_block);
1863                         mature_immBlock(false_block);
1864                         return;
1865                 }
1866         }
1867
1868         ir_node *body_jmp = new_Jmp();
1869         add_immBlock_pred(header_block, body_jmp);
1870         mature_immBlock(header_block);
1871
1872         /* create the condition */
1873         set_cur_block(header_block);
1874
1875         create_condition_evaluation(statement->condition, body_block, false_block);
1876         mature_immBlock(body_block);
1877         mature_immBlock(false_block);
1878         mature_immBlock(header_block);
1879
1880         set_cur_block(false_block);
1881 }
1882
1883 static void for_statement_to_firm(for_statement_t *statement)
1884 {
1885         ir_node *jmp = NULL;
1886         if (get_cur_block() != NULL) {
1887                 if(statement->initialisation != NULL) {
1888                         expression_to_firm(statement->initialisation);
1889                 }
1890                 jmp = new_Jmp();
1891         }
1892
1893         /* create the step block */
1894         ir_node *const step_block = new_immBlock();
1895         if (statement->step != NULL) {
1896                 expression_to_firm(statement->step);
1897         }
1898         ir_node *const step_jmp = new_Jmp();
1899
1900         /* create the header block */
1901         ir_node *const header_block = new_immBlock();
1902         if (jmp != NULL) {
1903                 add_immBlock_pred(header_block, jmp);
1904         }
1905         add_immBlock_pred(header_block, step_jmp);
1906
1907         /* the false block */
1908         ir_node *const false_block = new_immBlock();
1909
1910         /* the loop body */
1911         ir_node * body_block;
1912         if (statement->body != NULL) {
1913                 ir_node *const old_continue_label = continue_label;
1914                 ir_node *const old_break_label    = break_label;
1915                 continue_label = step_block;
1916                 break_label    = false_block;
1917
1918                 body_block = new_immBlock();
1919                 statement_to_firm(statement->body);
1920
1921                 assert(continue_label == step_block);
1922                 assert(break_label    == false_block);
1923                 continue_label = old_continue_label;
1924                 break_label    = old_break_label;
1925
1926                 if (get_cur_block() != NULL) {
1927                         ir_node *const jmp = new_Jmp();
1928                         add_immBlock_pred(step_block, jmp);
1929                 }
1930         } else {
1931                 body_block = step_block;
1932         }
1933
1934         /* create the condition */
1935         set_cur_block(header_block);
1936         if (statement->condition != NULL) {
1937                 create_condition_evaluation(statement->condition, body_block,
1938                                             false_block);
1939         } else {
1940                 keep_alive(header_block);
1941                 ir_node *jmp = new_Jmp();
1942                 add_immBlock_pred(body_block, jmp);
1943         }
1944
1945         mature_immBlock(body_block);
1946         mature_immBlock(false_block);
1947         mature_immBlock(step_block);
1948         mature_immBlock(header_block);
1949         mature_immBlock(false_block);
1950
1951         set_cur_block(false_block);
1952 }
1953
1954 static void create_declaration_entity(declaration_t *declaration,
1955                                       declaration_type_t declaration_type,
1956                                       ir_type *parent_type)
1957 {
1958         ident     *id     = new_id_from_str(declaration->symbol->string);
1959         ir_type   *irtype = get_ir_type(declaration->type);
1960         ir_entity *entity = new_entity(parent_type, id, irtype);
1961         set_entity_ld_ident(entity, id);
1962
1963         declaration->declaration_type = declaration_type;
1964         declaration->v.entity         = entity;
1965         set_entity_variability(entity, variability_uninitialized);
1966         /* TODO: visibility? */
1967 }
1968
1969 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
1970
1971 enum compound_graph_entry_type_t {
1972         COMPOUND_GRAPH_ENTRY_ARRAY,
1973         COMPOUND_GRAPH_ENTRY_COMPOUND
1974 };
1975
1976 struct compound_graph_path_entry_t {
1977         int type;
1978         union {
1979                 ir_entity *entity;
1980                 int        array_index;
1981         } v;
1982         compound_graph_path_entry_t *prev;
1983 };
1984
1985 static void create_initializer_list(initializer_list_t *initializer,
1986                                     type_t *type, ir_entity *entity,
1987                                     compound_graph_path_entry_t *entry,
1988                                     int len);
1989
1990 static void create_initializer_value(initializer_value_t *initializer,
1991                                      ir_entity *entity,
1992                                      compound_graph_path_entry_t *entry,
1993                                      int len)
1994 {
1995         ir_node *node = expression_to_firm(initializer->value);
1996
1997         ir_type *type = get_entity_type(entity);
1998         compound_graph_path *path = new_compound_graph_path(type, len);
1999
2000         int i = len - 1;
2001         for( ; entry != NULL; entry = entry->prev, --i) {
2002                 assert(i >= 0);
2003                 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
2004                         set_compound_graph_path_node(path, i, entry->v.entity);
2005                 } else {
2006                         assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
2007                         set_compound_graph_path_array_index(path, i, entry->v.array_index);
2008                 }
2009         }
2010         assert(i == -1);
2011
2012         add_compound_ent_value_w_path(entity, node, path);
2013 }
2014
2015 static void create_initializer_compound(initializer_list_t *initializer,
2016                                         compound_type_t *type,
2017                                         ir_entity *entity,
2018                                         compound_graph_path_entry_t *last_entry,
2019                                         int len)
2020 {
2021         declaration_t *compound_declaration = type->declaration;
2022
2023         declaration_t *compound_entry = compound_declaration->context.declarations;
2024
2025         compound_graph_path_entry_t entry;
2026         entry.type = COMPOUND_GRAPH_ENTRY_COMPOUND;
2027         entry.prev = last_entry;
2028         ++len;
2029
2030         size_t i = 0;
2031         for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
2032                 if(compound_entry->symbol == NULL)
2033                         continue;
2034                 if(compound_entry->namespc != NAMESPACE_NORMAL)
2035                         continue;
2036
2037                 if(i >= initializer->len)
2038                         break;
2039
2040                 entry.v.entity = compound_entry->v.entity;
2041
2042                 initializer_t *sub_initializer = initializer->initializers[i];
2043
2044                 assert(compound_entry != NULL);
2045                 assert(compound_entry->declaration_type
2046                                 == DECLARATION_TYPE_COMPOUND_MEMBER);
2047
2048                 if(sub_initializer->type == INITIALIZER_VALUE) {
2049                         create_initializer_value((initializer_value_t*) sub_initializer,
2050                                                  entity, &entry, len);
2051                 } else {
2052                         assert(sub_initializer->type == INITIALIZER_LIST);
2053                         create_initializer_list((initializer_list_t*) sub_initializer,
2054                                                 compound_entry->type, entity, &entry, len);
2055                 }
2056
2057                 ++i;
2058         }
2059 }
2060
2061 static void create_initializer_array(initializer_list_t *initializer,
2062                                      array_type_t *type, ir_entity *entity,
2063                                      compound_graph_path_entry_t *last_entry,
2064                                      int len)
2065 {
2066         type_t *element_type = type->element_type;
2067
2068         compound_graph_path_entry_t entry;
2069         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2070         entry.prev = last_entry;
2071         ++len;
2072
2073         for(size_t i = 0; i < initializer->len; ++i) {
2074                 entry.v.array_index = i;
2075
2076                 initializer_t *sub_initializer = initializer->initializers[i];
2077
2078                 if(sub_initializer->type == INITIALIZER_VALUE) {
2079                         create_initializer_value((initializer_value_t*) sub_initializer,
2080                                                  entity, &entry, len);
2081                 } else {
2082                         assert(sub_initializer->type == INITIALIZER_LIST);
2083                         create_initializer_list((initializer_list_t*) sub_initializer,
2084                                                 element_type, entity, &entry, len);
2085                 }
2086         }
2087 }
2088
2089 static void create_initializer_list(initializer_list_t *initializer,
2090                                     type_t *type, ir_entity *entity,
2091                                     compound_graph_path_entry_t *entry, int len)
2092 {
2093         if(type->type == TYPE_ARRAY) {
2094                 create_initializer_array(initializer, (array_type_t*) type,
2095                                          entity, entry, len);
2096         } else {
2097                 assert(type->type == TYPE_COMPOUND_STRUCT
2098                                 || type->type == TYPE_COMPOUND_UNION);
2099                 create_initializer_compound(initializer, (compound_type_t*) type,
2100                                             entity, entry, len);
2101         }
2102 }
2103
2104 static void create_initializer(declaration_t *declaration)
2105 {
2106         initializer_t *initializer = declaration->init.initializer;
2107         if(initializer == NULL)
2108                 return;
2109
2110         if(initializer->type == INITIALIZER_VALUE) {
2111                 initializer_value_t *initializer_value
2112                         = (initializer_value_t*) initializer;
2113                 ir_node *value = expression_to_firm(initializer_value->value);
2114
2115                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
2116                         set_value(declaration->v.value_number, value);
2117                 } else {
2118                         ir_entity *entity = declaration->v.entity;
2119
2120                         set_entity_variability(entity, variability_initialized);
2121                         set_atomic_ent_value(entity, value);
2122                 }
2123         } else {
2124                 assert(initializer->type == INITIALIZER_LIST);
2125                 initializer_list_t *list = (initializer_list_t*) initializer;
2126
2127                 declaration_type_t declaration_type = declaration->declaration_type;
2128                 assert(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY
2129                                 || declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2130
2131                 ir_entity *entity = declaration->v.entity;
2132                 set_entity_variability(entity, variability_initialized);
2133
2134                 create_initializer_list(list, declaration->type, entity, NULL, 0);
2135         }
2136 }
2137
2138 static void create_local_variable(declaration_t *declaration)
2139 {
2140         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2141
2142         bool needs_entity = declaration->address_taken;
2143         type_t *type = skip_typeref(declaration->type);
2144
2145         if(type->type == TYPE_ARRAY
2146                         || type->type == TYPE_COMPOUND_STRUCT
2147                         || type->type == TYPE_COMPOUND_UNION) {
2148                 needs_entity = true;
2149         }
2150
2151         if(needs_entity) {
2152                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2153                 create_declaration_entity(declaration,
2154                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
2155                                           frame_type);
2156         } else {
2157                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2158                 declaration->v.value_number   = next_value_number_function;
2159                 ++next_value_number_function;
2160         }
2161
2162         create_initializer(declaration);
2163 }
2164
2165 static void declaration_statement_to_firm(declaration_statement_t *statement)
2166 {
2167         declaration_t *declaration = statement->declarations_begin;
2168         declaration_t *end         = statement->declarations_end->next;
2169         for( ; declaration != end; declaration = declaration->next) {
2170                 type_t *type = declaration->type;
2171
2172                 switch(declaration->storage_class) {
2173                 case STORAGE_CLASS_TYPEDEF:
2174                         continue;
2175                 case STORAGE_CLASS_STATIC:
2176                         panic("static local vars not implemented yet");
2177                 case STORAGE_CLASS_ENUM_ENTRY:
2178                         panic("enum entry declaration in local block found");
2179                 case STORAGE_CLASS_EXTERN:
2180                         panic("extern declaration in local block found");
2181                 case STORAGE_CLASS_NONE:
2182                 case STORAGE_CLASS_AUTO:
2183                 case STORAGE_CLASS_REGISTER:
2184                         if(type->type == TYPE_FUNCTION) {
2185                                 panic("nested functions not supported yet");
2186                         } else {
2187                                 create_local_variable(declaration);
2188                         }
2189                         continue;
2190                 }
2191                 panic("invalid storage class found");
2192         }
2193 }
2194
2195 static void create_jump_statement(const statement_t *statement,
2196                                   ir_node *target_block)
2197 {
2198         if(get_cur_block() == NULL)
2199                 return;
2200
2201         dbg_info *dbgi = get_dbg_info(&statement->source_position);
2202         ir_node  *jump = new_d_Jmp(dbgi);
2203         add_immBlock_pred(target_block, jump);
2204
2205         set_cur_block(NULL);
2206 }
2207
2208 static void switch_statement_to_firm(const switch_statement_t *statement)
2209 {
2210         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2211
2212         ir_node *expression  = expression_to_firm(statement->expression);
2213         ir_node *cond        = new_d_Cond(dbgi, expression);
2214         ir_node *break_block = new_immBlock();
2215
2216         set_cur_block(NULL);
2217
2218         ir_node *const old_switch_cond       = current_switch_cond;
2219         ir_node *const old_break_label       = break_label;
2220         const bool     old_saw_default_label = saw_default_label;
2221         current_switch_cond                  = cond;
2222         break_label                          = break_block;
2223
2224         statement_to_firm(statement->body);
2225
2226         if(get_cur_block() != NULL) {
2227                 ir_node *jmp = new_Jmp();
2228                 add_immBlock_pred(break_block, jmp);
2229         }
2230
2231         if (!saw_default_label) {
2232                 set_cur_block(get_nodes_block(cond));
2233                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
2234                                                         MAGIC_DEFAULT_PN_NUMBER);
2235                 add_immBlock_pred(break_block, proj);
2236         }
2237
2238         assert(current_switch_cond == cond);
2239         assert(break_label         == break_block);
2240         current_switch_cond = old_switch_cond;
2241         break_label         = old_break_label;
2242         saw_default_label   = old_saw_default_label;
2243
2244         mature_immBlock(break_block);
2245         set_cur_block(break_block);
2246 }
2247
2248 static long fold_constant(const expression_t *expression)
2249 {
2250         ir_graph *old_current_ir_graph = current_ir_graph;
2251         current_ir_graph = get_const_code_irg();
2252
2253         ir_node *cnst = expression_to_firm(expression);
2254         if(!is_Const(cnst)) {
2255                 panic("couldn't fold constantl");
2256         }
2257         tarval *tv = get_Const_tarval(cnst);
2258         if(!tarval_is_long(tv)) {
2259                 panic("folded constant not an integer");
2260         }
2261
2262         long res = get_tarval_long(tv);
2263
2264         current_ir_graph = old_current_ir_graph;
2265         return res;
2266 }
2267
2268 static void case_label_to_firm(const case_label_statement_t *statement)
2269 {
2270         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2271
2272         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
2273
2274         /* let's create a node and hope firm constant folding creates a Const
2275          * node... */
2276         ir_node *proj;
2277         set_cur_block(get_nodes_block(current_switch_cond));
2278         if(statement->expression) {
2279                 long pn = fold_constant(statement->expression);
2280                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
2281                         /* oops someone detected our cheating... */
2282                         panic("magic default pn used");
2283                 }
2284                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
2285         } else {
2286                 saw_default_label = true;
2287                 proj = new_d_defaultProj(dbgi, current_switch_cond,
2288                                          MAGIC_DEFAULT_PN_NUMBER);
2289         }
2290
2291         ir_node *block = new_immBlock();
2292         if (fallthrough != NULL) {
2293                 add_immBlock_pred(block, fallthrough);
2294         }
2295         add_immBlock_pred(block, proj);
2296         mature_immBlock(block);
2297
2298         statement_to_firm(statement->label_statement);
2299 }
2300
2301 static ir_node *get_label_block(declaration_t *label)
2302 {
2303         assert(label->namespc == NAMESPACE_LABEL);
2304
2305         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
2306                 return label->v.block;
2307         }
2308         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
2309
2310         ir_node *old_cur_block = get_cur_block();
2311         ir_node *block         = new_immBlock();
2312         set_cur_block(old_cur_block);
2313
2314         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
2315         label->v.block          = block;
2316
2317         ARR_APP1(ir_node *, imature_blocks, block);
2318
2319         return block;
2320 }
2321
2322 static void label_to_firm(const label_statement_t *statement)
2323 {
2324         ir_node *block = get_label_block(statement->label);
2325
2326         if(get_cur_block() != NULL) {
2327                 ir_node *jmp = new_Jmp();
2328                 add_immBlock_pred(block, jmp);
2329         }
2330
2331         set_cur_block(block);
2332         keep_alive(block);
2333
2334         statement_to_firm(statement->label_statement);
2335 }
2336
2337 static void goto_to_firm(const goto_statement_t *statement)
2338 {
2339         if(get_cur_block() == NULL)
2340                 return;
2341
2342         ir_node *block = get_label_block(statement->label);
2343         ir_node *jmp   = new_Jmp();
2344         add_immBlock_pred(block, jmp);
2345
2346         set_cur_block(NULL);
2347 }
2348
2349 static void statement_to_firm(statement_t *statement)
2350 {
2351         switch(statement->type) {
2352         case STATEMENT_COMPOUND:
2353                 compound_statement_to_firm((compound_statement_t*) statement);
2354                 return;
2355         case STATEMENT_RETURN:
2356                 return_statement_to_firm((return_statement_t*) statement);
2357                 return;
2358         case STATEMENT_EXPRESSION:
2359                 expression_statement_to_firm((expression_statement_t*) statement);
2360                 return;
2361         case STATEMENT_IF:
2362                 if_statement_to_firm((if_statement_t*) statement);
2363                 return;
2364         case STATEMENT_WHILE:
2365                 while_statement_to_firm((while_statement_t*) statement);
2366                 return;
2367         case STATEMENT_DO_WHILE:
2368                 do_while_statement_to_firm((do_while_statement_t*) statement);
2369                 return;
2370         case STATEMENT_DECLARATION:
2371                 declaration_statement_to_firm((declaration_statement_t*) statement);
2372                 return;
2373         case STATEMENT_BREAK:
2374                 create_jump_statement(statement, break_label);
2375                 return;
2376         case STATEMENT_CONTINUE:
2377                 create_jump_statement(statement, continue_label);
2378                 return;
2379         case STATEMENT_SWITCH:
2380                 switch_statement_to_firm((switch_statement_t*) statement);
2381                 return;
2382         case STATEMENT_CASE_LABEL:
2383                 case_label_to_firm((case_label_statement_t*) statement);
2384                 return;
2385         case STATEMENT_FOR:
2386                 for_statement_to_firm((for_statement_t*) statement);
2387                 return;
2388         case STATEMENT_LABEL:
2389                 label_to_firm((label_statement_t*) statement);
2390                 return;
2391         case STATEMENT_GOTO:
2392                 goto_to_firm((goto_statement_t*) statement);
2393                 return;
2394         default:
2395                 break;
2396         }
2397         panic("Statement not implemented\n");
2398 }
2399
2400 static int count_local_declarations(const declaration_t *      decl,
2401                                     const declaration_t *const end)
2402 {
2403         int count = 0;
2404         for (; decl != end; decl = decl->next) {
2405                 const type_t *type = skip_typeref(decl->type);
2406                 switch (type->type) {
2407                         case TYPE_ATOMIC:
2408                         case TYPE_ENUM:
2409                         case TYPE_POINTER:
2410                                 if (!decl->address_taken) ++count;
2411                                 break;
2412
2413                         default: break;
2414                 }
2415         }
2416         return count;
2417 }
2418
2419 static int count_decls_in_stmts(const statement_t *stmt)
2420 {
2421         int count = 0;
2422         for (; stmt != NULL; stmt = stmt->next) {
2423                 switch (stmt->type) {
2424                         case STATEMENT_DECLARATION: {
2425                                 const declaration_statement_t *const decl_stmt =
2426                                         (const declaration_statement_t*)stmt;
2427                                 count += count_local_declarations(decl_stmt->declarations_begin,
2428                                                                   decl_stmt->declarations_end->next);
2429                                 break;
2430                         }
2431
2432                         case STATEMENT_COMPOUND: {
2433                                 const compound_statement_t *const comp =
2434                                         (const compound_statement_t*)stmt;
2435                                 count += count_decls_in_stmts(comp->statements);
2436                                 break;
2437                         }
2438
2439                         case STATEMENT_IF: {
2440                                 const if_statement_t *const if_stmt = (const if_statement_t*)stmt;
2441                                 count += count_decls_in_stmts(if_stmt->true_statement);
2442                                 count += count_decls_in_stmts(if_stmt->false_statement);
2443                                 break;
2444                         }
2445
2446                         case STATEMENT_SWITCH: {
2447                                 const switch_statement_t *const switch_stmt =
2448                                         (const switch_statement_t*)stmt;
2449                                 count += count_decls_in_stmts(switch_stmt->body);
2450                                 break;
2451                         }
2452
2453                         case STATEMENT_LABEL: {
2454                                 const label_statement_t *const label_stmt =
2455                                         (const label_statement_t*)stmt;
2456                                 count += count_decls_in_stmts(label_stmt->label_statement);
2457                                 break;
2458                         }
2459
2460                         case STATEMENT_WHILE: {
2461                                 const while_statement_t *const while_stmt =
2462                                         (const while_statement_t*)stmt;
2463                                 count += count_decls_in_stmts(while_stmt->body);
2464                                 break;
2465                         }
2466
2467                         case STATEMENT_DO_WHILE: {
2468                                 const do_while_statement_t *const do_while_stmt =
2469                                         (const do_while_statement_t*)stmt;
2470                                 count += count_decls_in_stmts(do_while_stmt->body);
2471                                 break;
2472                         }
2473
2474                         case STATEMENT_FOR: {
2475                                 const for_statement_t *const for_stmt =
2476                                         (const for_statement_t*)stmt;
2477                                 /* TODO initialisation */
2478                                 count += count_decls_in_stmts(for_stmt->body);
2479                                 break;
2480                         }
2481
2482                         case STATEMENT_BREAK:
2483                         case STATEMENT_CASE_LABEL:
2484                         case STATEMENT_CONTINUE:
2485                         case STATEMENT_EXPRESSION:
2486                         case STATEMENT_GOTO:
2487                         case STATEMENT_INVALID:
2488                         case STATEMENT_RETURN:
2489                                 break;
2490                 }
2491         }
2492         return count;
2493 }
2494
2495 static int get_function_n_local_vars(declaration_t *declaration)
2496 {
2497         int count = 0;
2498
2499         /* count parameters */
2500         count += count_local_declarations(declaration->context.declarations, NULL);
2501
2502         /* count local variables declared in body */
2503         count += count_decls_in_stmts(declaration->init.statement);
2504
2505         return count;
2506 }
2507
2508 static void initialize_function_parameters(declaration_t *declaration)
2509 {
2510         ir_graph        *irg             = current_ir_graph;
2511         ir_node         *args            = get_irg_args(irg);
2512         ir_node         *start_block     = get_irg_start_block(irg);
2513         ir_type         *function_irtype = get_ir_type(declaration->type);
2514
2515         int            n         = 0;
2516         declaration_t *parameter = declaration->context.declarations;
2517         for( ; parameter != NULL; parameter = parameter->next, ++n) {
2518                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
2519                 type_t *type = parameter->type;
2520
2521                 bool needs_entity = parameter->address_taken;
2522                 if(type->type == TYPE_COMPOUND_STRUCT
2523                                 || type->type == TYPE_COMPOUND_UNION) {
2524                         needs_entity = true;
2525                 }
2526
2527                 if(needs_entity) {
2528                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
2529                         ident     *id     = new_id_from_str(parameter->symbol->string);
2530                         set_entity_ident(entity, id);
2531
2532                         parameter->declaration_type
2533                                 = DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY;
2534                         parameter->v.entity = entity;
2535                         continue;
2536                 }
2537
2538                 ir_mode *mode = get_ir_mode(parameter->type);
2539                 long     pn   = n;
2540                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2541
2542                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2543                 parameter->v.value_number   = next_value_number_function;
2544                 ++next_value_number_function;
2545
2546                 set_value(parameter->v.value_number, proj);
2547         }
2548 }
2549
2550 static void create_function(declaration_t *declaration)
2551 {
2552         ir_entity *entity = get_function_entity(declaration);
2553
2554         if(declaration->init.statement == NULL)
2555                 return;
2556
2557         current_function_decl = declaration;
2558         current_function_name = NULL;
2559
2560         assert(imature_blocks == NULL);
2561         imature_blocks = NEW_ARR_F(ir_node*, 0);
2562
2563         int       n_local_vars = get_function_n_local_vars(declaration);
2564         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
2565         ir_node  *first_block  = get_cur_block();
2566
2567         next_value_number_function = 0;
2568         initialize_function_parameters(declaration);
2569
2570         statement_to_firm(declaration->init.statement);
2571
2572         ir_node *end_block = get_irg_end_block(irg);
2573
2574         /* do we have a return statement yet? */
2575         if(get_cur_block() != NULL) {
2576                 assert(declaration->type->type == TYPE_FUNCTION);
2577                 const function_type_t* const func_type
2578                         = (const function_type_t*) declaration->type;
2579                 ir_node *ret;
2580                 if (func_type->result_type == type_void) {
2581                         ret = new_Return(get_store(), 0, NULL);
2582                 } else {
2583                         ir_mode *const mode = get_ir_mode(func_type->result_type);
2584                         ir_node *      in[1];
2585                         // §5.1.2.2.3 main implicitly returns 0
2586                         if (strcmp(declaration->symbol->string, "main") == 0) {
2587                                 in[0] = new_Const(mode, get_mode_null(mode));
2588                         } else {
2589                                 in[0] = new_Unknown(mode);
2590                         }
2591                         ret = new_Return(get_store(), 1, in);
2592                 }
2593                 add_immBlock_pred(end_block, ret);
2594         }
2595
2596         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2597                 mature_immBlock(imature_blocks[i]);
2598         }
2599         DEL_ARR_F(imature_blocks);
2600         imature_blocks = NULL;
2601
2602         mature_immBlock(first_block);
2603         mature_immBlock(end_block);
2604
2605         irg_finalize_cons(irg);
2606
2607         /* finalize the frame type */
2608         ir_type *frame_type = get_irg_frame_type(irg);
2609         int      n          = get_compound_n_members(frame_type);
2610         int      align_all  = 4;
2611         int      offset     = 0;
2612         for(int i = 0; i < n; ++i) {
2613                 ir_entity *entity      = get_compound_member(frame_type, i);
2614                 ir_type   *entity_type = get_entity_type(entity);
2615
2616                 int align = get_type_alignment_bytes(entity_type);
2617                 if(align > align_all)
2618                         align_all = align;
2619                 int misalign = 0;
2620                 if(align > 0) {
2621                         misalign  = offset % align;
2622                         if(misalign > 0) {
2623                                 offset += align - misalign;
2624                         }
2625                 }
2626
2627                 set_entity_offset(entity, offset);
2628                 offset += get_type_size_bytes(entity_type);
2629         }
2630         set_type_size_bytes(frame_type, offset);
2631         set_type_alignment_bytes(frame_type, align_all);
2632         set_type_state(frame_type, layout_fixed);
2633
2634         irg_vrfy(irg);
2635 }
2636
2637 static void create_global_variable(declaration_t *declaration)
2638 {
2639         ir_type   *global_type = get_glob_type();
2640         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
2641                                   global_type);
2642
2643         ir_entity *entity = declaration->v.entity;
2644         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
2645                 set_entity_visibility(entity, visibility_local);
2646         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
2647                 set_entity_visibility(entity, visibility_external_allocated);
2648         } else {
2649                 set_entity_visibility(entity, visibility_external_visible);
2650         }
2651         current_ir_graph = get_const_code_irg();
2652         create_initializer(declaration);
2653 }
2654
2655 static void context_to_firm(context_t *context)
2656 {
2657         declaration_t *declaration = context->declarations;
2658         for( ; declaration != NULL; declaration = declaration->next) {
2659                 if(declaration->namespc != NAMESPACE_NORMAL)
2660                         continue;
2661                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2662                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2663                         continue;
2664                 if(declaration->symbol == NULL)
2665                         continue;
2666
2667                 type_t *type = declaration->type;
2668                 if(type->type == TYPE_FUNCTION) {
2669                         create_function(declaration);
2670                 } else {
2671                         create_global_variable(declaration);
2672                 }
2673         }
2674 }
2675
2676 void translation_unit_to_firm(translation_unit_t *unit)
2677 {
2678         /* just to be sure */
2679         continue_label      = NULL;
2680         break_label         = NULL;
2681         current_switch_cond = NULL;
2682
2683         context_to_firm(& unit->context);
2684 }