nsz Git - cparser/blob - ast2firm.c

   1 #include <config.h>
   2
   3 #define _GNU_SOURCE
   4
   5 #include <assert.h>
   6 #include <string.h>
   7 #include <stdbool.h>
   8
   9 #include <libfirm/firm.h>
  10 #include <libfirm/adt/obst.h>
  11
  12 #include "ast2firm.h"
  13
  14 #include "adt/error.h"
  15 #include "adt/array.h"
  16 #include "token_t.h"
  17 #include "type_t.h"
  18 #include "ast_t.h"
  19
  20 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  21
  22 static ir_type *ir_type_const_char;
  23 static ir_type *ir_type_void;
  24 static ir_type *ir_type_int;
  25 static ir_type *ir_type_void_ptr;
  26
  27 static type_t *type_const_char;
  28 static type_t *type_void;
  29 static type_t *type_int;
  30
  31 static int       next_value_number_function;
  32 static ir_node  *continue_label;
  33 static ir_node  *break_label;
  34 static ir_node  *current_switch_cond;
  35 static ir_node **imature_blocks;
  36
  37 typedef enum declaration_type_t {
  38         DECLARATION_TYPE_UNKNOWN,
  39         DECLARATION_TYPE_FUNCTION,
  40         DECLARATION_TYPE_GLOBAL_VARIABLE,
  41         DECLARATION_TYPE_LOCAL_VARIABLE,
  42         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  43         DECLARATION_TYPE_COMPOUND_MEMBER,
  44         DECLARATION_TYPE_LABEL_BLOCK,
  45 } declaration_type_t;
  46
  47 static ir_type *get_ir_type(type_t *type);
  48
  49 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  50 {
  51         (void) pos;
  52 #if 0
  53         const declaration_t *declaration = & value_numbers[pos]->declaration;
  54
  55         print_warning_prefix(declaration->source_position);
  56         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  57                         declaration->symbol->string);
  58 #endif
  59         fprintf(stderr, "Some variable might be used uninitialized\n");
  60         return new_r_Unknown(irg, mode);
  61 }
  62
  63 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  64 {
  65         const source_position_t *pos = (const source_position_t*) dbg;
  66         if(pos == NULL)
  67                 return 0;
  68         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  69                                    pos->linenr);
  70 }
  71
  72 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  73 {
  74         const source_position_t *pos = (const source_position_t*) dbg;
  75         if(pos == NULL)
  76                 return NULL;
  77         if(line != NULL)
  78                 *line = pos->linenr;
  79         return pos->input_name;
  80 }
  81
  82 void init_ast2firm(void)
  83 {
  84         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  85         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, 0);
  86         type_int        = make_atomic_type(ATOMIC_TYPE_INT, 0);
  87
  88         ir_type_int        = get_ir_type(type_int);
  89         ir_type_const_char = get_ir_type(type_const_char);
  90         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  91                                                        type in firm */
  92         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
  93                                               ir_type_void, mode_P_data);
  94
  95         type_void->firm_type = ir_type_void;
  96 }
  97
  98 void exit_ast2firm(void)
  99 {
 100 }
 101
 102 static unsigned unique_id = 0;
 103
 104 static ident *unique_ident(const char *tag)
 105 {
 106         char buf[256];
 107
 108         snprintf(buf, sizeof(buf), "%s.%d", tag, unique_id);
 109         unique_id++;
 110         return new_id_from_str(buf);
 111 }
 112
 113 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 114 {
 115         switch(atomic_type->atype) {
 116         case ATOMIC_TYPE_SCHAR:
 117         case ATOMIC_TYPE_CHAR:
 118                 return mode_Bs;
 119         case ATOMIC_TYPE_UCHAR:
 120                 return mode_Bu;
 121         case ATOMIC_TYPE_SHORT:
 122                 return mode_Hs;
 123         case ATOMIC_TYPE_USHORT:
 124                 return mode_Hu;
 125         case ATOMIC_TYPE_LONG:
 126         case ATOMIC_TYPE_INT:
 127                 return mode_Is;
 128         case ATOMIC_TYPE_ULONG:
 129         case ATOMIC_TYPE_UINT:
 130                 return mode_Iu;
 131         case ATOMIC_TYPE_LONGLONG:
 132                 return mode_Ls;
 133         case ATOMIC_TYPE_ULONGLONG:
 134                 return mode_Lu;
 135         case ATOMIC_TYPE_FLOAT:
 136                 return mode_F;
 137         case ATOMIC_TYPE_DOUBLE:
 138                 return mode_D;
 139         case ATOMIC_TYPE_LONG_DOUBLE:
 140                 return mode_E;
 141         case ATOMIC_TYPE_BOOL:
 142                 return mode_b;
 143 #ifdef PROVIDE_COMPLEX
 144         case ATOMIC_TYPE_FLOAT_COMPLEX:
 145         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 146         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 147                 panic("complex lowering not implemented yet");
 148                 break;
 149         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 150         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 151         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 152                 panic("imaginary lowering not implemented yet");
 153                 break;
 154 #endif
 155         case ATOMIC_TYPE_VOID:
 156                 /* firm has no real void... */
 157                 return mode_Is;
 158         case ATOMIC_TYPE_INVALID:
 159                 break;
 160         }
 161         panic("Encountered unknown atomic type");
 162 }
 163
 164
 165 static unsigned get_type_size(type_t *type);
 166
 167 static unsigned get_atomic_type_size(const atomic_type_t *type)
 168 {
 169         switch(type->atype) {
 170         case ATOMIC_TYPE_CHAR:
 171         case ATOMIC_TYPE_SCHAR:
 172         case ATOMIC_TYPE_UCHAR:
 173                 return 1;
 174
 175         case ATOMIC_TYPE_SHORT:
 176         case ATOMIC_TYPE_USHORT:
 177                 return 2;
 178
 179         case ATOMIC_TYPE_BOOL:
 180         case ATOMIC_TYPE_INT:
 181         case ATOMIC_TYPE_UINT:
 182         case ATOMIC_TYPE_LONG:
 183         case ATOMIC_TYPE_ULONG:
 184         case ATOMIC_TYPE_FLOAT:
 185                 return 4;
 186
 187         case ATOMIC_TYPE_LONGLONG:
 188         case ATOMIC_TYPE_ULONGLONG:
 189         case ATOMIC_TYPE_DOUBLE:
 190                 return 8;
 191
 192         case ATOMIC_TYPE_LONG_DOUBLE:
 193                 return 12;
 194
 195         case ATOMIC_TYPE_VOID:
 196                 return 1;
 197
 198         case ATOMIC_TYPE_INVALID:
 199                 break;
 200         }
 201         panic("Trying to determine size of invalid atomic type");
 202 }
 203
 204 static unsigned get_compound_type_size(compound_type_t *type)
 205 {
 206         ir_type *irtype = get_ir_type(&type->type);
 207         return get_type_size_bytes(irtype);
 208 }
 209
 210 static unsigned get_array_type_size(array_type_t *type)
 211 {
 212         ir_type *irtype = get_ir_type(&type->type);
 213         return get_type_size_bytes(irtype);
 214 }
 215
 216 static unsigned get_type_size(type_t *type)
 217 {
 218         type = skip_typeref(type);
 219
 220         switch(type->type) {
 221         case TYPE_ATOMIC:
 222                 return get_atomic_type_size((const atomic_type_t*) type);
 223         case TYPE_ENUM:
 224                 return get_mode_size_bytes(mode_Is);
 225         case TYPE_COMPOUND_UNION:
 226         case TYPE_COMPOUND_STRUCT:
 227                 return get_compound_type_size((compound_type_t*) type);
 228         case TYPE_FUNCTION:
 229                 /* just a pointer to the function */
 230                 return get_mode_size_bytes(mode_P_code);
 231         case TYPE_POINTER:
 232                 return get_mode_size_bytes(mode_P_data);
 233         case TYPE_ARRAY:
 234                 return get_array_type_size((array_type_t*) type);
 235         case TYPE_BUILTIN:
 236         case TYPE_TYPEDEF:
 237         case TYPE_TYPEOF:
 238         case TYPE_INVALID:
 239                 break;
 240         }
 241         panic("Trying to determine size of invalid type");
 242 }
 243
 244 static unsigned count_parameters(const function_type_t *function_type)
 245 {
 246         unsigned count = 0;
 247
 248         function_parameter_t *parameter = function_type->parameters;
 249         for ( ; parameter != NULL; parameter = parameter->next) {
 250                 ++count;
 251         }
 252
 253         return count;
 254 }
 255
 256
 257
 258
 259 static long fold_constant(const expression_t *expression);
 260
 261 static ir_type *create_atomic_type(const atomic_type_t *type)
 262 {
 263         ir_mode *mode   = get_atomic_mode(type);
 264         ident   *id     = get_mode_ident(mode);
 265         ir_type *irtype = new_type_primitive(id, mode);
 266
 267         return irtype;
 268 }
 269
 270 static ir_type *create_method_type(const function_type_t *function_type)
 271 {
 272         type_t  *result_type  = function_type->result_type;
 273
 274         ident   *id           = unique_ident("functiontype");
 275         int      n_parameters = count_parameters(function_type);
 276         int      n_results    = result_type == type_void ? 0 : 1;
 277         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 278
 279         if(result_type != type_void) {
 280                 ir_type *restype = get_ir_type(result_type);
 281                 set_method_res_type(irtype, 0, restype);
 282         }
 283
 284         function_parameter_t *parameter = function_type->parameters;
 285         int                   n         = 0;
 286         for( ; parameter != NULL; parameter = parameter->next) {
 287                 ir_type *p_irtype = get_ir_type(parameter->type);
 288                 set_method_param_type(irtype, n, p_irtype);
 289                 ++n;
 290         }
 291
 292         if(function_type->variadic || function_type->unspecified_parameters) {
 293                 set_method_variadicity(irtype, variadicity_variadic);
 294         }
 295
 296         return irtype;
 297 }
 298
 299 static ir_type *create_pointer_type(pointer_type_t *type)
 300 {
 301         type_t  *points_to = type->points_to;
 302         ir_type *ir_points_to;
 303         /* Avoid endless recursion if the points_to type contains this poiner type
 304          * again (might be a struct). We therefore first create a void* pointer
 305          * and then set the real points_to type
 306          */
 307         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 308                                             ir_type_void, mode_P_data);
 309         type->type.firm_type  = ir_type;
 310
 311         ir_points_to = get_ir_type(points_to);
 312         set_pointer_points_to_type(ir_type, ir_points_to);
 313
 314         return ir_type;
 315 }
 316
 317 static ir_type *create_array_type(array_type_t *type)
 318 {
 319         type_t  *element_type    = type->element_type;
 320         ir_type *ir_element_type = get_ir_type(element_type);
 321
 322         ident   *id      = unique_ident("array");
 323         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 324
 325         if(type->size != NULL) {
 326                 int n_elements = fold_constant(type->size);
 327
 328                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 329
 330                 size_t elemsize = get_type_size_bytes(ir_element_type);
 331                 int align = get_type_alignment_bytes(ir_element_type);
 332                 if(elemsize % align > 0) {
 333                         elemsize += align - (elemsize % align);
 334                 }
 335                 set_type_size_bytes(ir_type, n_elements * elemsize);
 336                 set_type_alignment_bytes(ir_type, align);
 337                 set_type_state(ir_type, layout_fixed);
 338         }
 339
 340         return ir_type;
 341 }
 342
 343 #define INVALID_TYPE ((ir_type_ptr)-1)
 344
 345 static ir_type *create_struct_type(compound_type_t *type)
 346 {
 347         symbol_t *symbol = type->declaration->symbol;
 348         ident    *id;
 349         if(symbol != NULL) {
 350                 id = unique_ident(symbol->string);
 351         } else {
 352                 id = unique_ident("__anonymous_struct");
 353         }
 354         ir_type *ir_type = new_type_struct(id);
 355
 356         type->type.firm_type = ir_type;
 357
 358         int align_all = 1;
 359         int offset    = 0;
 360         declaration_t *entry = type->declaration->context.declarations;
 361         for( ; entry != NULL; entry = entry->next) {
 362                 if(entry->namespace != NAMESPACE_NORMAL)
 363                         continue;
 364
 365                 ident       *ident         = new_id_from_str(entry->symbol->string);
 366                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 367
 368                 int entry_size      = get_type_size_bytes(entry_ir_type);
 369                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 370                 int misalign = offset % entry_alignment;
 371                 offset += misalign;
 372
 373                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 374                 set_entity_offset(entity, offset);
 375                 add_struct_member(ir_type, entity);
 376                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 377                 entry->v.entity         = entity;
 378
 379                 offset += entry_size;
 380                 if(entry_alignment > align_all) {
 381                         if(entry_alignment % align_all != 0) {
 382                                 panic("Uneven alignments not supported yet");
 383                         }
 384                         align_all = entry_alignment;
 385                 }
 386         }
 387
 388         int misalign = offset % align_all;
 389         offset += misalign;
 390         set_type_alignment_bytes(ir_type, align_all);
 391         set_type_size_bytes(ir_type, offset);
 392         set_type_state(ir_type, layout_fixed);
 393
 394         return ir_type;
 395 }
 396
 397 static ir_type *create_union_type(compound_type_t *type)
 398 {
 399         declaration_t *declaration = type->declaration;
 400         symbol_t      *symbol      = declaration->symbol;
 401         ident         *id;
 402         if(symbol != NULL) {
 403                 id = unique_ident(symbol->string);
 404         } else {
 405                 id = unique_ident("__anonymous_union");
 406         }
 407         ir_type  *ir_type = new_type_union(id);
 408
 409         type->type.firm_type = ir_type;
 410
 411         int align_all = 1;
 412         int size      = 0;
 413         declaration_t *entry = declaration->context.declarations;
 414         for( ; entry != NULL; entry = entry->next) {
 415                 if(entry->namespace != NAMESPACE_NORMAL)
 416                         continue;
 417
 418                 ident       *ident         = new_id_from_str(entry->symbol->string);
 419                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 420
 421                 int entry_size      = get_type_size_bytes(entry_ir_type);
 422                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 423
 424                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 425                 add_union_member(ir_type, entity);
 426                 set_entity_offset(entity, 0);
 427                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 428                 entry->v.entity         = entity;
 429
 430                 if(entry_size > size) {
 431                         size = entry_size;
 432                 }
 433                 if(entry_alignment > align_all) {
 434                         if(entry_alignment % align_all != 0) {
 435                                 panic("Uneven alignments not supported yet");
 436                         }
 437                         align_all = entry_alignment;
 438                 }
 439         }
 440
 441         set_type_alignment_bytes(ir_type, align_all);
 442         set_type_size_bytes(ir_type, size);
 443         set_type_state(ir_type, layout_fixed);
 444
 445         return ir_type;
 446 }
 447
 448 static ir_type *get_ir_type(type_t *type)
 449 {
 450         assert(type != NULL);
 451
 452         type = skip_typeref(type);
 453
 454         if(type->firm_type != NULL) {
 455                 assert(type->firm_type != INVALID_TYPE);
 456                 return type->firm_type;
 457         }
 458
 459         ir_type *firm_type = NULL;
 460         switch(type->type) {
 461         case TYPE_ATOMIC:
 462                 firm_type = create_atomic_type((atomic_type_t*) type);
 463                 break;
 464         case TYPE_FUNCTION:
 465                 firm_type = create_method_type((function_type_t*) type);
 466                 break;
 467         case TYPE_POINTER:
 468                 firm_type = create_pointer_type((pointer_type_t*) type);
 469                 break;
 470         case TYPE_ARRAY:
 471                 firm_type = create_array_type((array_type_t*) type);
 472                 break;
 473         case TYPE_COMPOUND_STRUCT:
 474                 firm_type = create_struct_type((compound_type_t*) type);
 475                 break;
 476         case TYPE_COMPOUND_UNION:
 477                 firm_type = create_union_type((compound_type_t*) type);
 478                 break;
 479         case TYPE_ENUM:
 480                 firm_type = ir_type_int;
 481                 break;
 482         case TYPE_BUILTIN:
 483         case TYPE_TYPEOF:
 484         case TYPE_TYPEDEF:
 485         case TYPE_INVALID:
 486                 break;
 487         }
 488         if(firm_type == NULL)
 489                 panic("unknown type found");
 490
 491         type->firm_type = firm_type;
 492         return firm_type;
 493 }
 494
 495 static inline ir_mode *get_ir_mode(type_t *type)
 496 {
 497         ir_type *irtype = get_ir_type(type);
 498
 499         /* firm doesn't report a mode for arrays somehow... */
 500         if(is_Array_type(irtype)) {
 501                 return mode_P;
 502         }
 503
 504         ir_mode *mode   = get_type_mode(irtype);
 505         assert(mode != NULL);
 506         return mode;
 507 }
 508
 509 static ir_entity* get_function_entity(declaration_t *declaration)
 510 {
 511         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 512                 return declaration->v.entity;
 513         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 514
 515         symbol_t *symbol = declaration->symbol;
 516         ident    *id     = new_id_from_str(symbol->string);
 517
 518         ir_type  *global_type    = get_glob_type();
 519         ir_type  *ir_type_method = get_ir_type(declaration->type);
 520         assert(is_Method_type(ir_type_method));
 521
 522         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 523         set_entity_ld_ident(entity, id);
 524         if(declaration->storage_class == STORAGE_CLASS_STATIC
 525                         || declaration->is_inline) {
 526                 set_entity_visibility(entity, visibility_local);
 527         } else if(declaration->init.statement != NULL) {
 528                 set_entity_visibility(entity, visibility_external_visible);
 529         } else {
 530                 set_entity_visibility(entity, visibility_external_allocated);
 531         }
 532
 533         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 534         declaration->v.entity         = entity;
 535
 536         return entity;
 537 }
 538
 539
 540
 541 static ir_node *expression_to_firm(const expression_t *expression);
 542 static ir_node *expression_to_modeb(const expression_t *expression);
 543
 544 static dbg_info *get_dbg_info(const source_position_t *pos)
 545 {
 546         return (dbg_info*) pos;
 547 }
 548
 549 static ir_node *const_to_firm(const const_t *cnst)
 550 {
 551         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 552         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 553
 554         tarval   *tv;
 555         if(mode_is_float(mode)) {
 556                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 557         } else {
 558                 tv = new_tarval_from_long(cnst->v.int_value, mode);
 559         }
 560
 561         return new_d_Const(dbgi, mode, tv);
 562 }
 563
 564 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 565 {
 566         assert(entity != NULL);
 567         union symconst_symbol sym;
 568         sym.entity_p = entity;
 569         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 570 }
 571
 572 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 573 {
 574         ir_type   *global_type = get_glob_type();
 575         ir_type   *type        = new_type_array(unique_ident("strtype"), 1,
 576                                                 ir_type_const_char);
 577
 578         ident     *id     = unique_ident("Lstr");
 579         ir_entity *entity = new_entity(global_type, id, type);
 580         set_entity_ld_ident(entity, id);
 581         set_entity_variability(entity, variability_constant);
 582
 583         ir_type    *elem_type = ir_type_const_char;
 584         ir_mode    *mode      = get_type_mode(elem_type);
 585
 586         const char *string = literal->value;
 587         size_t      slen   = strlen(string) + 1;
 588
 589         set_array_lower_bound_int(type, 0, 0);
 590         set_array_upper_bound_int(type, 0, slen);
 591         set_type_size_bytes(type, slen);
 592         set_type_state(type, layout_fixed);
 593
 594         tarval **tvs = xmalloc(slen * sizeof(tvs[0]));
 595         for(size_t i = 0; i < slen; ++i) {
 596                 tvs[i] = new_tarval_from_long(string[i], mode);
 597         }
 598
 599         set_array_entity_values(entity, tvs, slen);
 600         free(tvs);
 601
 602         dbg_info *dbgi = get_dbg_info(&literal->expression.source_position);
 603
 604         return create_symconst(dbgi, entity);
 605 }
 606
 607 static ir_node *load_from_expression_addr(type_t *type, ir_node *addr,
 608                                           dbg_info *dbgi)
 609 {
 610         ir_mode *mode     = get_ir_mode(type);
 611         ir_node *memory   = get_store();
 612         ir_node *load     = new_d_Load(dbgi, memory, addr, mode);
 613         ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 614         ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
 615         set_store(load_mem);
 616
 617         return load_res;
 618 }
 619
 620 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 621 {
 622         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 623         declaration_t *declaration = ref->declaration;
 624         type_t        *type        = skip_typeref(declaration->type);
 625         ir_mode       *mode        = get_ir_mode(type);
 626
 627         switch((declaration_type_t) declaration->declaration_type) {
 628         case DECLARATION_TYPE_UNKNOWN:
 629                 break;
 630         case DECLARATION_TYPE_LOCAL_VARIABLE:
 631                 return get_value(declaration->v.value_number, mode);
 632         case DECLARATION_TYPE_FUNCTION: {
 633                 return create_symconst(dbgi, declaration->v.entity);
 634         }
 635         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 636                 ir_entity *entity   = declaration->v.entity;
 637                 ir_node   *symconst = create_symconst(dbgi, entity);
 638
 639                 if(type->type == TYPE_ARRAY) {
 640                         return symconst;
 641                 } else {
 642                         return load_from_expression_addr(type, symconst, dbgi);
 643                 }
 644         }
 645         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 646                 ir_entity *entity = declaration->v.entity;
 647                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 648                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 649
 650                 if(type->type == TYPE_ARRAY) {
 651                         return sel;
 652                 } else {
 653                         return load_from_expression_addr(type, sel, dbgi);
 654                 }
 655         }
 656
 657         case DECLARATION_TYPE_COMPOUND_MEMBER:
 658         case DECLARATION_TYPE_LABEL_BLOCK:
 659                 panic("not implemented reference type");
 660         }
 661
 662         panic("reference to declaration with unknown type found");
 663 }
 664
 665 static ir_node *reference_addr(const reference_expression_t *ref)
 666 {
 667         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 668         declaration_t *declaration = ref->declaration;
 669
 670         switch((declaration_type_t) declaration->declaration_type) {
 671         case DECLARATION_TYPE_UNKNOWN:
 672                 break;
 673         case DECLARATION_TYPE_LOCAL_VARIABLE:
 674                 panic("local variable without entity has no address");
 675         case DECLARATION_TYPE_FUNCTION: {
 676                 return create_symconst(dbgi, declaration->v.entity);
 677         }
 678         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 679                 ir_entity *entity   = declaration->v.entity;
 680                 ir_node   *symconst = create_symconst(dbgi, entity);
 681                 return symconst;
 682         }
 683         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY:
 684         case DECLARATION_TYPE_COMPOUND_MEMBER:
 685         case DECLARATION_TYPE_LABEL_BLOCK:
 686                 panic("not implemented reference type");
 687         }
 688
 689         panic("reference to declaration with unknown type found");
 690 }
 691
 692 static ir_node *call_expression_to_firm(const call_expression_t *call)
 693 {
 694         assert(get_cur_block() != NULL);
 695
 696         expression_t  *function = call->function;
 697         ir_node       *callee   = expression_to_firm(function);
 698
 699         assert(function->datatype->type == TYPE_FUNCTION);
 700         function_type_t *function_type = (function_type_t*) function->datatype;
 701
 702         int              n_parameters = 0;
 703         call_argument_t *argument     = call->arguments;
 704         for( ; argument != NULL; argument = argument->next) {
 705                 ++n_parameters;
 706         }
 707
 708         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 709         ir_type *new_method_type = NULL;
 710         if(function_type->variadic || function_type->unspecified_parameters) {
 711                 /* we need to construct a new method type matching the call
 712                  * arguments... */
 713                 int n_res       = get_method_n_ress(ir_method_type);
 714                 new_method_type = new_type_method(unique_ident("calltype"),
 715                                                   n_parameters, n_res);
 716                 set_method_calling_convention(new_method_type,
 717                                get_method_calling_convention(ir_method_type));
 718                 set_method_additional_properties(new_method_type,
 719                                get_method_additional_properties(ir_method_type));
 720
 721                 for(int i = 0; i < n_res; ++i) {
 722                         set_method_res_type(new_method_type, i,
 723                                             get_method_res_type(ir_method_type, i));
 724                 }
 725         }
 726         ir_node *in[n_parameters];
 727
 728         argument = call->arguments;
 729         int n = 0;
 730         for( ; argument != NULL; argument = argument->next) {
 731                 expression_t *expression = argument->expression;
 732                 ir_node      *arg_node   = expression_to_firm(expression);
 733
 734                 in[n] = arg_node;
 735                 if(new_method_type != NULL) {
 736                         ir_type *irtype = get_ir_type(expression->datatype);
 737                         set_method_param_type(new_method_type, n, irtype);
 738                 }
 739
 740                 n++;
 741         }
 742         assert(n == n_parameters);
 743
 744         if(new_method_type != NULL)
 745                 ir_method_type = new_method_type;
 746
 747         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 748         ir_node  *store = get_store();
 749         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 750                                      ir_method_type);
 751         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 752         set_store(mem);
 753
 754         type_t  *result_type = function_type->result_type;
 755         ir_node *result      = NULL;
 756         if(result_type != type_void) {
 757                 ir_mode *mode    = get_ir_mode(result_type);
 758                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 759                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 760         }
 761
 762         return result;
 763 }
 764
 765 static ir_node *expression_to_addr(const expression_t *expression);
 766
 767 static void set_value_for_expression(const expression_t *expression,
 768                                      ir_node *value)
 769 {
 770         if(expression->type == EXPR_REFERENCE) {
 771                 reference_expression_t *ref = (reference_expression_t*) expression;
 772
 773                 declaration_t *declaration = ref->declaration;
 774                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 775                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 776                         set_value(declaration->v.value_number, value);
 777                         return;
 778                 }
 779         }
 780
 781         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 782         ir_node  *addr      = expression_to_addr(expression);
 783         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 784         ir_node  *memory    = get_store();
 785         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 786         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 787         set_store(store_mem);
 788 }
 789
 790 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 791 {
 792         ir_mode *value_mode = get_irn_mode(value);
 793
 794         if(value_mode == dest_mode)
 795                 return value;
 796
 797         if(dest_mode == mode_b) {
 798                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 799                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 800                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 801                 return proj;
 802         }
 803
 804         return new_d_Conv(dbgi, value, dest_mode);
 805 }
 806
 807 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 808 {
 809         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 810         type_t   *type = expression->expression.datatype;
 811         ir_mode  *mode = get_ir_mode(type);
 812
 813         if(expression->type == UNEXPR_TAKE_ADDRESS)
 814                 return expression_to_addr(expression->value);
 815
 816         const expression_t *value      = expression->value;
 817         ir_node            *value_node = expression_to_firm(value);
 818
 819         switch(expression->type) {
 820         case UNEXPR_NEGATE:
 821                 return new_d_Minus(dbgi, value_node, mode);
 822         case UNEXPR_PLUS:
 823                 return value_node;
 824         case UNEXPR_BITWISE_NEGATE:
 825                 return new_d_Not(dbgi, value_node, mode);
 826         case UNEXPR_NOT:
 827                 if(get_irn_mode(value_node) != mode_b) {
 828                         value_node = create_conv(dbgi, value_node, mode_b);
 829                 }
 830                 value_node = new_d_Not(dbgi, value_node, mode_b);
 831                 if(mode != mode_b) {
 832                         value_node = create_conv(dbgi, value_node, mode);
 833                 }
 834                 return value_node;
 835         case UNEXPR_DEREFERENCE:
 836                 return load_from_expression_addr(type, value_node, dbgi);
 837         case UNEXPR_POSTFIX_INCREMENT: {
 838                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 839                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 840                 set_value_for_expression(value, new_value);
 841                 return value_node;
 842         }
 843         case UNEXPR_POSTFIX_DECREMENT: {
 844                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 845                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 846                 set_value_for_expression(value, new_value);
 847                 return value_node;
 848         }
 849         case UNEXPR_PREFIX_INCREMENT: {
 850                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 851                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 852                 set_value_for_expression(value, new_value);
 853                 return new_value;
 854         }
 855         case UNEXPR_PREFIX_DECREMENT: {
 856                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 857                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 858                 set_value_for_expression(value, new_value);
 859                 return new_value;
 860         }
 861         case UNEXPR_CAST:
 862                 return create_conv(dbgi, value_node, mode);
 863
 864         case UNEXPR_TAKE_ADDRESS:
 865         case UNEXPR_INVALID:
 866                 break;
 867         }
 868         panic("invalid UNEXPR type found");
 869 }
 870
 871 static long get_pnc(binary_expression_type_t type)
 872 {
 873         switch(type) {
 874         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 875         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 876         case BINEXPR_LESS:         return pn_Cmp_Lt;
 877         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 878         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 879         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 880         default:
 881                 break;
 882         }
 883         panic("trying to get pn_Cmp from non-comparison binexpr type");
 884 }
 885
 886 static ir_node *create_lazy_op(const binary_expression_t *expression)
 887 {
 888         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 889
 890         bool is_or = (expression->type == BINEXPR_LOGICAL_OR);
 891         assert(is_or || expression->type == BINEXPR_LOGICAL_AND);
 892
 893         ir_node  *val1       = expression_to_modeb(expression->left);
 894         ir_node  *cond       = new_d_Cond(dbgi, val1);
 895         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
 896         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
 897
 898         ir_node *fallthrough_block = new_immBlock();
 899
 900         /* the true case */
 901         ir_node *calc_val2_block = new_immBlock();
 902         if(is_or) {
 903                 add_immBlock_pred(calc_val2_block, false_proj);
 904         } else {
 905                 add_immBlock_pred(calc_val2_block, true_proj);
 906         }
 907
 908         mature_immBlock(calc_val2_block);
 909
 910         ir_node *val2 = expression_to_modeb(expression->right);
 911         if(get_cur_block() != NULL) {
 912                 ir_node *jmp = new_d_Jmp(dbgi);
 913                 add_immBlock_pred(fallthrough_block, jmp);
 914         }
 915
 916         /* fallthrough */
 917         ir_node *constb;
 918         if(is_or) {
 919                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_true());
 920                 add_immBlock_pred(fallthrough_block, true_proj);
 921         } else {
 922                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_false());
 923                 add_immBlock_pred(fallthrough_block, false_proj);
 924         }
 925         mature_immBlock(fallthrough_block);
 926
 927         set_cur_block(fallthrough_block);
 928
 929         ir_node *in[2] = { val2, constb };
 930         ir_node *val   = new_d_Phi(dbgi, 2, in, mode_b);
 931
 932         return val;
 933 }
 934
 935 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
 936                                             ir_node *right, ir_mode *mode);
 937
 938 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
 939                                         create_arithmetic_func func)
 940 {
 941         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 942         ir_node  *left  = expression_to_firm(expression->left);
 943         ir_node  *right = expression_to_firm(expression->right);
 944         type_t   *type  = expression->right->datatype;
 945         /* be careful with the modes, because in asithmetic assign nodes only
 946          * the right operand has the mode of the arithmetic alread */
 947         ir_mode  *mode  = get_ir_mode(type);
 948         left            = create_conv(dbgi, left, mode);
 949         ir_node  *res   = func(dbgi, left, right, mode);
 950
 951         return res;
 952 }
 953
 954 static ir_node *create_arithmetic_assign_binop(
 955                 const binary_expression_t *expression, create_arithmetic_func func)
 956 {
 957         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 958         ir_node  *value = create_arithmetic_binop(expression, func);
 959         type_t   *type  = expression->expression.datatype;
 960         ir_mode  *mode  = get_ir_mode(type);
 961
 962         assert(type->type != TYPE_POINTER);
 963
 964         value = create_conv(dbgi, value, mode);
 965         set_value_for_expression(expression->left, value);
 966
 967         return value;
 968 }
 969
 970 static ir_node *create_add(const binary_expression_t *expression)
 971 {
 972         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 973         ir_node  *left  = expression_to_firm(expression->left);
 974         ir_node  *right = expression_to_firm(expression->right);
 975         type_t   *type  = expression->expression.datatype;
 976         ir_mode  *mode  = get_ir_mode(type);
 977
 978         expression_t *expr_left  = expression->left;
 979         expression_t *expr_right = expression->right;
 980         type_t       *type_left  = skip_typeref(expr_left->datatype);
 981         type_t       *type_right = skip_typeref(expr_right->datatype);
 982
 983         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
 984                 return new_d_Add(dbgi, left, right, mode);
 985         }
 986
 987         ir_node        *pointer;
 988         ir_node        *integer;
 989         pointer_type_t *pointer_type;
 990         if(type_left->type == TYPE_POINTER) {
 991                 pointer      = left;
 992                 integer      = right;
 993                 pointer_type = (pointer_type_t*) type_left;
 994         } else {
 995                 assert(type_right->type == TYPE_POINTER);
 996                 pointer      = right;
 997                 integer      = left;
 998                 pointer_type = (pointer_type_t*) type_right;
 999         }
1000
1001         type_t   *points_to = pointer_type->points_to;
1002         unsigned  elem_size = get_type_size(points_to);
1003
1004         assert(elem_size >= 1);
1005         if(elem_size > 1) {
1006                 integer       = create_conv(dbgi, integer, mode_Is);
1007                 ir_node *cnst = new_Const_long(mode_Is, (int) elem_size);
1008                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
1009                 integer = mul;
1010         }
1011
1012         ir_node *res = new_d_Add(dbgi, pointer, integer, mode);
1013
1014         return res;
1015 }
1016
1017 static ir_node *create_sub(const binary_expression_t *expression)
1018 {
1019         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1020         ir_node  *left  = expression_to_firm(expression->left);
1021         ir_node  *right = expression_to_firm(expression->right);
1022         type_t   *type  = expression->expression.datatype;
1023         ir_mode  *mode  = get_ir_mode(type);
1024
1025         expression_t *expr_left  = expression->left;
1026         expression_t *expr_right = expression->right;
1027         type_t       *type_left  = skip_typeref(expr_left->datatype);
1028         type_t       *type_right = skip_typeref(expr_right->datatype);
1029
1030         if((is_type_arithmetic(type_left) && is_type_arithmetic(type_right))
1031                         || (type_left->type == TYPE_POINTER
1032                                 && type_right->type == TYPE_POINTER)) {
1033                 return new_d_Sub(dbgi, left, right, mode);
1034         }
1035
1036         assert(type_right->type == TYPE_POINTER);
1037         ir_node        *pointer      = left;
1038         ir_node        *integer      = right;
1039         pointer_type_t *pointer_type = (pointer_type_t*) type_right;
1040
1041         type_t   *points_to = pointer_type->points_to;
1042         unsigned  elem_size = get_type_size(points_to);
1043
1044         assert(elem_size >= 1);
1045         if(elem_size > 1) {
1046                 ir_node *cnst = new_Const_long(mode_Iu, elem_size);
1047                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Iu);
1048                 integer = mul;
1049         }
1050
1051         ir_node *res = new_d_Sub(dbgi, pointer, integer, mode);
1052
1053         return res;
1054 }
1055
1056 static ir_node *create_shift(const binary_expression_t *expression)
1057 {
1058         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1059         ir_node  *left  = expression_to_firm(expression->left);
1060         ir_node  *right = expression_to_firm(expression->right);
1061         type_t   *type  = expression->expression.datatype;
1062         ir_mode  *mode  = get_ir_mode(type);
1063
1064         /* firm always wants the shift count to be unsigned */
1065         right = create_conv(dbgi, right, mode_Iu);
1066
1067         ir_node *res;
1068
1069         switch(expression->type) {
1070         case BINEXPR_SHIFTLEFT:
1071                 res = new_d_Shl(dbgi, left, right, mode);
1072                 break;
1073         case BINEXPR_SHIFTRIGHT: {
1074                  expression_t *expr_left = expression->left;
1075                  type_t       *type_left = skip_typeref(expr_left->datatype);
1076
1077                  if(is_type_signed(type_left)) {
1078                         res = new_d_Shrs(dbgi, left, right, mode);
1079                  } else {
1080                          res = new_d_Shr(dbgi, left, right, mode);
1081                  }
1082                  break;
1083         }
1084         default:
1085                 panic("create shift op called for non-shift op");
1086         }
1087
1088         return res;
1089 }
1090
1091
1092 static ir_node *create_divmod(const binary_expression_t *expression)
1093 {
1094         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1095         ir_node  *left  = expression_to_firm(expression->left);
1096         ir_node  *right = expression_to_firm(expression->right);
1097         ir_node  *pin   = new_Pin(new_NoMem());
1098         type_t   *type  = expression->expression.datatype;
1099         ir_mode  *mode  = get_ir_mode(type);
1100         ir_node  *op;
1101         ir_node  *res;
1102
1103         if(expression->type == BINEXPR_DIV) {
1104                 if(mode_is_float(mode)) {
1105                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1106                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1107                 } else {
1108                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1109                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1110                 }
1111         } else {
1112                 assert(expression->type == BINEXPR_MOD);
1113                 assert(!mode_is_float(mode));
1114                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1115                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1116         }
1117
1118         return res;
1119 }
1120
1121
1122
1123 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1124 {
1125         binary_expression_type_t type = expression->type;
1126         switch(type) {
1127         case BINEXPR_EQUAL:
1128         case BINEXPR_NOTEQUAL:
1129         case BINEXPR_LESS:
1130         case BINEXPR_LESSEQUAL:
1131         case BINEXPR_GREATER:
1132         case BINEXPR_GREATEREQUAL: {
1133                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1134                 ir_node *left  = expression_to_firm(expression->left);
1135                 ir_node *right = expression_to_firm(expression->right);
1136                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1137                 long     pnc   = get_pnc(type);
1138                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1139                 return proj;
1140         }
1141         case BINEXPR_ASSIGN: {
1142                 ir_node *right = expression_to_firm(expression->right);
1143                 set_value_for_expression(expression->left, right);
1144                 return right;
1145         }
1146         case BINEXPR_ADD:
1147                 return create_add(expression);
1148         case BINEXPR_SUB:
1149                 return create_sub(expression);
1150         case BINEXPR_MUL:
1151                 return create_arithmetic_binop(expression, new_d_Mul);
1152         case BINEXPR_BITWISE_AND:
1153                 return create_arithmetic_binop(expression, new_d_And);
1154         case BINEXPR_BITWISE_OR:
1155                 return create_arithmetic_binop(expression, new_d_Or);
1156         case BINEXPR_BITWISE_XOR:
1157                 return create_arithmetic_binop(expression, new_d_Eor);
1158         case BINEXPR_SHIFTLEFT:
1159         case BINEXPR_SHIFTRIGHT:
1160                 return create_shift(expression);
1161         case BINEXPR_DIV:
1162         case BINEXPR_MOD:
1163                 return create_divmod(expression);
1164         case BINEXPR_LOGICAL_AND:
1165         case BINEXPR_LOGICAL_OR:
1166                 return create_lazy_op(expression);
1167         case BINEXPR_COMMA:
1168                 expression_to_firm(expression->left);
1169                 return expression_to_firm(expression->right);
1170         case BINEXPR_ADD_ASSIGN:
1171                 return create_arithmetic_assign_binop(expression, new_d_Add);
1172         case BINEXPR_SUB_ASSIGN:
1173                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1174         case BINEXPR_MUL_ASSIGN:
1175                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1176         case BINEXPR_BITWISE_AND_ASSIGN:
1177                 return create_arithmetic_assign_binop(expression, new_d_And);
1178         case BINEXPR_BITWISE_OR_ASSIGN:
1179                 return create_arithmetic_assign_binop(expression, new_d_Or);
1180         case BINEXPR_BITWISE_XOR_ASSIGN:
1181                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1182         case BINEXPR_SHIFTLEFT_ASSIGN:
1183                 return create_arithmetic_assign_binop(expression, new_d_Shl);
1184         case BINEXPR_SHIFTRIGHT_ASSIGN:
1185                 return create_arithmetic_assign_binop(expression, new_d_Shr);
1186         default:
1187                 panic("TODO binexpr type");
1188         }
1189 }
1190
1191 static ir_node *array_access_addr(const array_access_expression_t *expression)
1192 {
1193         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1194
1195         ir_node *base_addr = expression_to_firm(expression->array_ref);
1196         ir_node *offset    = expression_to_firm(expression->index);
1197         offset             = create_conv(dbgi, offset, mode_Iu);
1198
1199         unsigned elem_size       = get_type_size(expression->expression.datatype);
1200         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1201         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1202                                              mode_Iu);
1203         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1204
1205         return result;
1206 }
1207
1208 static ir_node *array_access_to_firm(
1209                 const array_access_expression_t *expression)
1210 {
1211         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1212         ir_node  *addr = array_access_addr(expression);
1213         type_t   *type = expression->expression.datatype;
1214
1215         return load_from_expression_addr(type, addr, dbgi);
1216 }
1217
1218 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1219 {
1220         type_t *type = expression->type;
1221         if(type == NULL) {
1222                 type = expression->size_expression->datatype;
1223                 assert(type != NULL);
1224         }
1225
1226         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1227         unsigned  size      = get_type_size(type);
1228         ir_node  *size_node = new_Const_long(mode, size);
1229
1230         return size_node;
1231 }
1232
1233 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1234 {
1235         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1236
1237         ir_node *condition  = expression_to_modeb(expression->condition);
1238         ir_node *cond       = new_d_Cond(dbgi, condition);
1239         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1240         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1241
1242         /* create the true block */
1243         ir_node *true_block = new_immBlock();
1244         add_immBlock_pred(true_block, true_proj);
1245         mature_immBlock(true_block);
1246
1247         ir_node *true_val = expression_to_firm(expression->true_expression);
1248         ir_node *true_jmp = new_Jmp();
1249
1250         /* create the false block */
1251         ir_node *false_block = new_immBlock();
1252         add_immBlock_pred(false_block, false_proj);
1253         mature_immBlock(false_block);
1254
1255         ir_node *false_val = expression_to_firm(expression->false_expression);
1256         ir_node *false_jmp = new_Jmp();
1257
1258         /* create the common block */
1259         ir_node *common_block = new_immBlock();
1260         add_immBlock_pred(common_block, true_jmp);
1261         add_immBlock_pred(common_block, false_jmp);
1262         mature_immBlock(common_block);
1263
1264         ir_node *in[2] = { true_val, false_val };
1265         ir_mode *mode  = get_irn_mode(true_val);
1266         assert(get_irn_mode(false_val) == mode);
1267         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1268
1269         return val;
1270 }
1271
1272 static ir_node *select_addr(const select_expression_t *expression)
1273 {
1274         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1275
1276         ir_node *compound_addr = expression_to_firm(expression->compound);
1277
1278         declaration_t *entry = expression->compound_entry;
1279         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1280         ir_entity     *entity = entry->v.entity;
1281
1282         assert(entity != NULL);
1283
1284         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1285
1286         return sel;
1287 }
1288
1289 static ir_node *select_to_firm(const select_expression_t *expression)
1290 {
1291         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1292         ir_node  *addr = select_addr(expression);
1293         type_t   *type = expression->expression.datatype;
1294
1295         return load_from_expression_addr(type, addr, dbgi);
1296 }
1297
1298 static ir_node *dereference_addr(const unary_expression_t *const expression)
1299 {
1300         assert(expression->type == UNEXPR_DEREFERENCE);
1301         return expression_to_firm(expression->value);
1302 }
1303
1304 static ir_node *expression_to_addr(const expression_t *expression)
1305 {
1306         switch(expression->type) {
1307         case EXPR_REFERENCE:
1308                 return reference_addr((const reference_expression_t*) expression);
1309         case EXPR_ARRAY_ACCESS:
1310                 return array_access_addr((const array_access_expression_t*) expression);
1311         case EXPR_SELECT:
1312                 return select_addr((const select_expression_t*) expression);
1313         case EXPR_UNARY: {
1314                 const unary_expression_t *const unary_expr =
1315                         (const unary_expression_t*)expression;
1316                 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1317                         return dereference_addr(unary_expr);
1318                 }
1319                 break;
1320         }
1321         default:
1322                 break;
1323         }
1324         panic("trying to get address of non-lvalue");
1325 }
1326
1327 static ir_node *_expression_to_firm(const expression_t *expression)
1328 {
1329         switch(expression->type) {
1330         case EXPR_CONST:
1331                 return const_to_firm((const const_t*) expression);
1332         case EXPR_STRING_LITERAL:
1333                 return string_literal_to_firm((const string_literal_t*) expression);
1334         case EXPR_REFERENCE:
1335                 return reference_expression_to_firm(
1336                                 (const reference_expression_t*) expression);
1337         case EXPR_CALL:
1338                 return call_expression_to_firm((const call_expression_t*) expression);
1339         case EXPR_UNARY:
1340                 return unary_expression_to_firm((const unary_expression_t*) expression);
1341         case EXPR_BINARY:
1342                 return binary_expression_to_firm(
1343                                 (const binary_expression_t*) expression);
1344         case EXPR_ARRAY_ACCESS:
1345                 return array_access_to_firm(
1346                                 (const array_access_expression_t*) expression);
1347         case EXPR_SIZEOF:
1348                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1349         case EXPR_CONDITIONAL:
1350                 return conditional_to_firm((const conditional_expression_t*)expression);
1351         case EXPR_SELECT:
1352                 return select_to_firm((const select_expression_t*) expression);
1353         case EXPR_FUNCTION:
1354         case EXPR_OFFSETOF:
1355         case EXPR_PRETTY_FUNCTION:
1356         case EXPR_VA_ARG:
1357         case EXPR_STATEMENT:
1358         case EXPR_BUILTIN_SYMBOL:
1359                 panic("unimplemented expression found");
1360
1361         case EXPR_UNKNOWN:
1362         case EXPR_INVALID:
1363                 break;
1364         }
1365         panic("invalid expression found");
1366 }
1367
1368 static ir_node *expression_to_firm(const expression_t *expression)
1369 {
1370         ir_node *res  = _expression_to_firm(expression);
1371
1372         if(expression->datatype == type_void)
1373                 return NULL;
1374
1375         ir_mode *mode = get_ir_mode(expression->datatype);
1376         res           = create_conv(NULL, res, mode);
1377         return res;
1378 }
1379
1380 static ir_node *expression_to_modeb(const expression_t *expression)
1381 {
1382         ir_node *res = _expression_to_firm(expression);
1383         res          = create_conv(NULL, res, mode_b);
1384
1385         return res;
1386 }
1387
1388 static void statement_to_firm(statement_t *statement);
1389
1390 static void return_statement_to_firm(return_statement_t *statement)
1391 {
1392         if(get_cur_block() == NULL)
1393                 return;
1394
1395         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1396         ir_node  *ret;
1397
1398         if(statement->return_value != NULL) {
1399                 ir_node *retval = expression_to_firm(statement->return_value);
1400                 ir_node *in[1];
1401
1402                 in[0] = retval;
1403                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1404         } else {
1405                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1406         }
1407         ir_node *end_block = get_irg_end_block(current_ir_graph);
1408         add_immBlock_pred(end_block, ret);
1409
1410         set_cur_block(NULL);
1411 }
1412
1413 static void compound_statement_to_firm(compound_statement_t *compound)
1414 {
1415         statement_t *statement = compound->statements;
1416         for( ; statement != NULL; statement = statement->next) {
1417                 //context2firm(&statement->context);
1418                 statement_to_firm(statement);
1419         }
1420 }
1421
1422 static void expression_statement_to_firm(expression_statement_t *statement)
1423 {
1424         if(get_cur_block() == NULL)
1425                 return;
1426
1427         expression_to_firm(statement->expression);
1428 }
1429
1430 static void if_statement_to_firm(if_statement_t *statement)
1431 {
1432         dbg_info *dbgi      = get_dbg_info(&statement->statement.source_position);
1433         ir_node  *condition = expression_to_modeb(statement->condition);
1434
1435         /* make sure we have a mode_b condition */
1436         ir_node *cond       = new_d_Cond(dbgi, condition);
1437         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1438         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1439
1440         ir_node *fallthrough_block = new_immBlock();
1441
1442         /* the true (blocks) */
1443         ir_node *true_block = new_immBlock();
1444         add_immBlock_pred(true_block, true_proj);
1445         mature_immBlock(true_block);
1446
1447         statement_to_firm(statement->true_statement);
1448         if(get_cur_block() != NULL) {
1449                 ir_node *jmp = new_Jmp();
1450                 add_immBlock_pred(fallthrough_block, jmp);
1451         }
1452
1453         /* the false (blocks) */
1454         if(statement->false_statement != NULL) {
1455                 ir_node *false_block = new_immBlock();
1456                 add_immBlock_pred(false_block, false_proj);
1457                 mature_immBlock(false_block);
1458
1459                 statement_to_firm(statement->false_statement);
1460                 if(get_cur_block() != NULL) {
1461                         ir_node *jmp = new_Jmp();
1462                         add_immBlock_pred(fallthrough_block, jmp);
1463                 }
1464         } else {
1465                 add_immBlock_pred(fallthrough_block, false_proj);
1466         }
1467         mature_immBlock(fallthrough_block);
1468
1469         set_cur_block(fallthrough_block);
1470 }
1471
1472 static void while_statement_to_firm(while_statement_t *statement)
1473 {
1474         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1475
1476         ir_node *jmp = NULL;
1477         if(get_cur_block() != NULL) {
1478                 jmp = new_Jmp();
1479         }
1480
1481         /* create the header block */
1482         ir_node *header_block = new_immBlock();
1483         if(jmp != NULL) {
1484                 add_immBlock_pred(header_block, jmp);
1485         }
1486
1487         /* create the condition */
1488         ir_node *condition  = expression_to_modeb(statement->condition);
1489         ir_node *cond       = new_d_Cond(dbgi, condition);
1490         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1491         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1492
1493         /* the false block */
1494         ir_node *false_block = new_immBlock();
1495         add_immBlock_pred(false_block, false_proj);
1496
1497         /* the loop body */
1498         ir_node *body_block = new_immBlock();
1499         add_immBlock_pred(body_block, true_proj);
1500         mature_immBlock(body_block);
1501
1502         ir_node *old_continue_label = continue_label;
1503         ir_node *old_break_label    = break_label;
1504         continue_label              = header_block;
1505         break_label                 = false_block;
1506
1507         statement_to_firm(statement->body);
1508
1509         assert(continue_label == header_block);
1510         assert(break_label    == false_block);
1511         continue_label = old_continue_label;
1512         break_label    = old_break_label;
1513
1514         if(get_cur_block() != NULL) {
1515                 ir_node *jmp = new_Jmp();
1516                 add_immBlock_pred(header_block, jmp);
1517         }
1518
1519         mature_immBlock(header_block);
1520         mature_immBlock(false_block);
1521
1522         set_cur_block(false_block);
1523 }
1524
1525 static void do_while_statement_to_firm(do_while_statement_t *statement)
1526 {
1527         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1528
1529         ir_node *jmp = NULL;
1530         if(get_cur_block() != NULL) {
1531                 jmp = new_Jmp();
1532         }
1533
1534         /* create the header block */
1535         ir_node *header_block = new_immBlock();
1536
1537         /* the false block */
1538         ir_node *false_block = new_immBlock();
1539
1540         /* the loop body */
1541         ir_node *body_block = new_immBlock();
1542         if(jmp != NULL) {
1543                 add_immBlock_pred(body_block, jmp);
1544         }
1545
1546         ir_node *old_continue_label = continue_label;
1547         ir_node *old_break_label    = break_label;
1548         continue_label              = header_block;
1549         break_label                 = false_block;
1550
1551         statement_to_firm(statement->body);
1552
1553         assert(continue_label == header_block);
1554         assert(break_label    == false_block);
1555         continue_label = old_continue_label;
1556         break_label    = old_break_label;
1557
1558         if(get_cur_block() == NULL) {
1559                 mature_immBlock(header_block);
1560                 mature_immBlock(body_block);
1561                 mature_immBlock(false_block);
1562                 return;
1563         }
1564
1565         ir_node *body_jmp = new_Jmp();
1566         add_immBlock_pred(header_block, body_jmp);
1567         mature_immBlock(header_block);
1568
1569         /* create the condition */
1570         set_cur_block(header_block);
1571         ir_node *condition  = expression_to_modeb(statement->condition);
1572         ir_node *cond       = new_d_Cond(dbgi, condition);
1573         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1574         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1575
1576         add_immBlock_pred(body_block, true_proj);
1577         mature_immBlock(body_block);
1578
1579         add_immBlock_pred(false_block, false_proj);
1580         mature_immBlock(false_block);
1581
1582         set_cur_block(false_block);
1583 }
1584
1585 static void for_statement_to_firm(for_statement_t *statement)
1586 {
1587         dbg_info *const dbgi = get_dbg_info(&statement->statement.source_position);
1588
1589         ir_node *jmp = NULL;
1590         if (get_cur_block() != NULL) {
1591                 if(statement->initialisation != NULL) {
1592                         expression_to_firm(statement->initialisation);
1593                 }
1594                 jmp = new_Jmp();
1595         }
1596
1597         /* create the step block */
1598         ir_node *const step_block = new_immBlock();
1599         if (statement->step != NULL) {
1600                 expression_to_firm(statement->step);
1601         }
1602         ir_node *const step_jmp   = new_Jmp();
1603
1604         /* create the header block */
1605         ir_node *const header_block = new_immBlock();
1606         if (jmp != NULL) {
1607                 add_immBlock_pred(header_block, jmp);
1608         }
1609         add_immBlock_pred(header_block, step_jmp);
1610
1611         /* create the condition */
1612         ir_node *true_proj;
1613         ir_node *false_proj;
1614         if (statement->condition != NULL) {
1615                 ir_node *const condition  = expression_to_modeb(statement->condition);
1616                 ir_node *const cond       = new_d_Cond(dbgi, condition);
1617                 true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1618                 false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1619         } else {
1620                 keep_alive(header_block);
1621                 true_proj  = new_Jmp();
1622                 false_proj = NULL;
1623         }
1624
1625         /* the false block */
1626         ir_node *const false_block = new_immBlock();
1627         if (false_proj != NULL) {
1628                 add_immBlock_pred(false_block, false_proj);
1629         }
1630
1631         /* the loop body */
1632         ir_node *const body_block = new_immBlock();
1633         add_immBlock_pred(body_block, true_proj);
1634         mature_immBlock(body_block);
1635
1636         ir_node *const old_continue_label = continue_label;
1637         ir_node *const old_break_label    = break_label;
1638         continue_label = step_block;
1639         break_label    = false_block;
1640
1641         statement_to_firm(statement->body);
1642
1643         assert(continue_label == step_block);
1644         assert(break_label    == false_block);
1645         continue_label = old_continue_label;
1646         break_label    = old_break_label;
1647
1648         if (get_cur_block() != NULL) {
1649                 ir_node *const jmp = new_Jmp();
1650                 add_immBlock_pred(step_block, jmp);
1651         }
1652
1653         mature_immBlock(step_block);
1654         mature_immBlock(header_block);
1655         mature_immBlock(false_block);
1656
1657         set_cur_block(false_block);
1658 }
1659
1660 static void create_declaration_entity(declaration_t *declaration,
1661                                       declaration_type_t declaration_type,
1662                                       ir_type *parent_type)
1663 {
1664         ident     *id     = new_id_from_str(declaration->symbol->string);
1665         ir_type   *irtype = get_ir_type(declaration->type);
1666         ir_entity *entity = new_entity(parent_type, id, irtype);
1667         set_entity_ld_ident(entity, id);
1668
1669         declaration->declaration_type = declaration_type;
1670         declaration->v.entity         = entity;
1671         set_entity_variability(entity, variability_uninitialized);
1672         /* TODO: visibility? */
1673 }
1674
1675 static void create_initializer(declaration_t *declaration)
1676 {
1677         initializer_t *initializer = declaration->init.initializer;
1678         if(initializer == NULL)
1679                 return;
1680
1681         if(initializer->type == INITIALIZER_VALUE) {
1682                 assert(initializer->designator == NULL);
1683                 assert(initializer->next == NULL);
1684                 ir_node *init_node = expression_to_firm(initializer->v.value);
1685
1686                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1687                         set_value(declaration->v.value_number, init_node);
1688                 } else {
1689                         ir_entity *entity = declaration->v.entity;
1690
1691                         set_entity_variability(entity, variability_initialized);
1692                         set_atomic_ent_value(entity, init_node);
1693                 }
1694         } else {
1695                 assert(initializer->type == INITIALIZER_LIST);
1696                 panic("list initializer not supported yet");
1697         }
1698 }
1699
1700 static void create_local_variable(declaration_t *declaration)
1701 {
1702         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
1703
1704         bool needs_entity = declaration->address_taken;
1705         type_t *type = declaration->type;
1706         if(type->type == TYPE_ARRAY
1707                         || type->type == TYPE_COMPOUND_STRUCT
1708                         || type->type == TYPE_COMPOUND_UNION) {
1709                 needs_entity = true;
1710         }
1711
1712         if(needs_entity) {
1713                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
1714                 create_declaration_entity(declaration,
1715                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
1716                                           frame_type);
1717         } else {
1718                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1719                 declaration->v.value_number   = next_value_number_function;
1720                 ++next_value_number_function;
1721         }
1722
1723         create_initializer(declaration);
1724 }
1725
1726 static void declaration_statement_to_firm(declaration_statement_t *statement)
1727 {
1728         declaration_t *declaration = statement->declarations_begin;
1729         declaration_t *end         = statement->declarations_end->next;
1730         for( ; declaration != end; declaration = declaration->next) {
1731                 type_t *type = declaration->type;
1732
1733                 switch(declaration->storage_class) {
1734                 case STORAGE_CLASS_TYPEDEF:
1735                         continue;
1736                 case STORAGE_CLASS_STATIC:
1737                         panic("static local vars not implemented yet");
1738                 case STORAGE_CLASS_ENUM_ENTRY:
1739                         panic("enum entry declaration in local block found");
1740                 case STORAGE_CLASS_EXTERN:
1741                         panic("extern declaration in local block found");
1742                 case STORAGE_CLASS_NONE:
1743                 case STORAGE_CLASS_AUTO:
1744                 case STORAGE_CLASS_REGISTER:
1745                         if(type->type == TYPE_FUNCTION) {
1746                                 panic("nested functions not supported yet");
1747                         } else {
1748                                 create_local_variable(declaration);
1749                         }
1750                         continue;
1751                 }
1752                 panic("invalid storage class found");
1753         }
1754 }
1755
1756 static void create_jump_statement(const statement_t *statement,
1757                                   ir_node *target_block)
1758 {
1759         if(get_cur_block() == NULL)
1760                 return;
1761
1762         dbg_info *dbgi = get_dbg_info(&statement->source_position);
1763         ir_node  *jump = new_d_Jmp(dbgi);
1764         add_immBlock_pred(target_block, jump);
1765
1766         set_cur_block(NULL);
1767 }
1768
1769 static void switch_statement_to_firm(const switch_statement_t *statement)
1770 {
1771         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1772
1773         ir_node *expression  = expression_to_firm(statement->expression);
1774         ir_node *cond        = new_d_Cond(dbgi, expression);
1775         ir_node *break_block = new_immBlock();
1776
1777         set_cur_block(NULL);
1778
1779         ir_node *old_switch_cond = current_switch_cond;
1780         ir_node *old_break_label = break_label;
1781         current_switch_cond      = cond;
1782         break_label              = break_block;
1783
1784         statement_to_firm(statement->body);
1785
1786         if(get_cur_block() != NULL) {
1787                 ir_node *jmp = new_Jmp();
1788                 add_immBlock_pred(break_block, jmp);
1789         }
1790
1791         assert(current_switch_cond == cond);
1792         assert(break_label         == break_block);
1793         current_switch_cond = old_switch_cond;
1794         break_label         = old_break_label;
1795
1796         mature_immBlock(break_block);
1797         set_cur_block(break_block);
1798 }
1799
1800 static long fold_constant(const expression_t *expression)
1801 {
1802         ir_graph *old_current_ir_graph = current_ir_graph;
1803         current_ir_graph = get_const_code_irg();
1804
1805         ir_node *cnst = expression_to_firm(expression);
1806         if(!is_Const(cnst)) {
1807                 panic("couldn't fold constantl");
1808         }
1809         tarval *tv = get_Const_tarval(cnst);
1810         if(!tarval_is_long(tv)) {
1811                 panic("folded constant not an integer");
1812         }
1813
1814         long res = get_tarval_long(tv);
1815
1816         current_ir_graph = old_current_ir_graph;
1817         return res;
1818 }
1819
1820 static void case_label_to_firm(const case_label_statement_t *statement)
1821 {
1822         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1823
1824         /* let's create a node and hope firm constant folding creates a Const
1825          * node... */
1826         ir_node *proj;
1827         set_cur_block(get_nodes_block(current_switch_cond));
1828         if(statement->expression) {
1829                 long pn = fold_constant(statement->expression);
1830                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
1831                         /* oops someone detected our cheating... */
1832                         panic("magic default pn used");
1833                 }
1834                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
1835         } else {
1836                 proj = new_d_defaultProj(dbgi, current_switch_cond,
1837                                          MAGIC_DEFAULT_PN_NUMBER);
1838         }
1839
1840         ir_node *block = new_immBlock();
1841         add_immBlock_pred(block, proj);
1842         mature_immBlock(block);
1843 }
1844
1845 static ir_node *get_label_block(declaration_t *label)
1846 {
1847         assert(label->namespace == NAMESPACE_LABEL);
1848
1849         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
1850                 return label->v.block;
1851         }
1852         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
1853
1854         ir_node *old_cur_block = get_cur_block();
1855         ir_node *block         = new_immBlock();
1856         set_cur_block(old_cur_block);
1857
1858         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
1859         label->v.block          = block;
1860
1861         ARR_APP1(imature_blocks, block);
1862
1863         return block;
1864 }
1865
1866 static void label_to_firm(const label_statement_t *statement)
1867 {
1868         ir_node *block = get_label_block(statement->label);
1869
1870         if(get_cur_block() != NULL) {
1871                 ir_node *jmp = new_Jmp();
1872                 add_immBlock_pred(block, jmp);
1873         }
1874
1875         set_cur_block(block);
1876         keep_alive(block);
1877
1878         statement_to_firm(statement->label_statement);
1879 }
1880
1881 static void goto_to_firm(const goto_statement_t *statement)
1882 {
1883         if(get_cur_block() == NULL)
1884                 return;
1885
1886         ir_node *block = get_label_block(statement->label);
1887         ir_node *jmp   = new_Jmp();
1888         add_immBlock_pred(block, jmp);
1889
1890         set_cur_block(NULL);
1891 }
1892
1893 static void statement_to_firm(statement_t *statement)
1894 {
1895         switch(statement->type) {
1896         case STATEMENT_COMPOUND:
1897                 compound_statement_to_firm((compound_statement_t*) statement);
1898                 return;
1899         case STATEMENT_RETURN:
1900                 return_statement_to_firm((return_statement_t*) statement);
1901                 return;
1902         case STATEMENT_EXPRESSION:
1903                 expression_statement_to_firm((expression_statement_t*) statement);
1904                 return;
1905         case STATEMENT_IF:
1906                 if_statement_to_firm((if_statement_t*) statement);
1907                 return;
1908         case STATEMENT_WHILE:
1909                 while_statement_to_firm((while_statement_t*) statement);
1910                 return;
1911         case STATEMENT_DO_WHILE:
1912                 do_while_statement_to_firm((do_while_statement_t*) statement);
1913                 return;
1914         case STATEMENT_DECLARATION:
1915                 declaration_statement_to_firm((declaration_statement_t*) statement);
1916                 return;
1917         case STATEMENT_BREAK:
1918                 create_jump_statement(statement, break_label);
1919                 return;
1920         case STATEMENT_CONTINUE:
1921                 create_jump_statement(statement, continue_label);
1922                 return;
1923         case STATEMENT_SWITCH:
1924                 switch_statement_to_firm((switch_statement_t*) statement);
1925                 return;
1926         case STATEMENT_CASE_LABEL:
1927                 case_label_to_firm((case_label_statement_t*) statement);
1928                 return;
1929         case STATEMENT_FOR:
1930                 for_statement_to_firm((for_statement_t*) statement);
1931                 return;
1932         case STATEMENT_LABEL:
1933                 label_to_firm((label_statement_t*) statement);
1934                 return;
1935         case STATEMENT_GOTO:
1936                 goto_to_firm((goto_statement_t*) statement);
1937                 return;
1938         default:
1939                 break;
1940         }
1941         panic("Statement not implemented\n");
1942 }
1943
1944 static int get_function_n_local_vars(declaration_t *declaration)
1945 {
1946         (void) declaration;
1947         /* TODO */
1948         return 30;
1949 }
1950
1951 static void initialize_function_parameters(declaration_t *declaration)
1952 {
1953         ir_graph *irg         = current_ir_graph;
1954         ir_node  *args        = get_irg_args(irg);
1955         ir_node  *start_block = get_irg_start_block(irg);
1956
1957         int            n         = 0;
1958         declaration_t *parameter = declaration->context.declarations;
1959         for( ; parameter != NULL; parameter = parameter->next) {
1960                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
1961
1962                 if(parameter->address_taken) {
1963                         panic("address take from parameter not implemented yet");
1964                 }
1965
1966                 ir_mode *mode = get_ir_mode(parameter->type);
1967                 long     pn   = n;
1968                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
1969                 ++n;
1970
1971                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1972                 parameter->v.value_number   = next_value_number_function;
1973                 ++next_value_number_function;
1974
1975                 set_value(parameter->v.value_number, proj);
1976         }
1977 }
1978
1979 static void create_function(declaration_t *declaration)
1980 {
1981         ir_entity *entity = get_function_entity(declaration);
1982
1983         if(declaration->init.statement == NULL)
1984                 return;
1985
1986         assert(imature_blocks == NULL);
1987         imature_blocks = NEW_ARR_F(ir_node*, 0);
1988
1989         int       n_local_vars = get_function_n_local_vars(declaration);
1990         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
1991         ir_node  *first_block  = get_cur_block();
1992
1993         next_value_number_function = 0;
1994         initialize_function_parameters(declaration);
1995
1996         statement_to_firm(declaration->init.statement);
1997
1998         ir_node *end_block = get_irg_end_block(irg);
1999
2000         /* do we have a return statement yet? */
2001         if(get_cur_block() != NULL) {
2002                 assert(declaration->type->type == TYPE_FUNCTION);
2003                 const function_type_t* const func_type
2004                         = (const function_type_t*) declaration->type;
2005                 ir_node *ret;
2006                 if (func_type->result_type == type_void) {
2007                         ret = new_Return(get_store(), 0, NULL);
2008                 } else {
2009                         ir_mode *const mode = get_ir_mode(func_type->result_type);
2010                         ir_node *      in[1];
2011                         // §5.1.2.2.3 main implicitly returns 0
2012                         if (strcmp(declaration->symbol->string, "main") == 0) {
2013                                 in[0] = new_Const(mode, get_mode_null(mode));
2014                         } else {
2015                                 in[0] = new_Unknown(mode);
2016                         }
2017                         ret = new_Return(get_store(), 1, in);
2018                 }
2019                 add_immBlock_pred(end_block, ret);
2020         }
2021
2022         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2023                 mature_immBlock(imature_blocks[i]);
2024         }
2025         DEL_ARR_F(imature_blocks);
2026         imature_blocks = NULL;
2027
2028         mature_immBlock(first_block);
2029         mature_immBlock(end_block);
2030
2031         irg_finalize_cons(irg);
2032
2033         /* finalize the frame type */
2034         ir_type *frame_type = get_irg_frame_type(irg);
2035         int      n          = get_compound_n_members(frame_type);
2036         int      align_all  = 4;
2037         int      offset     = 0;
2038         for(int i = 0; i < n; ++i) {
2039                 ir_entity *entity      = get_compound_member(frame_type, i);
2040                 ir_type   *entity_type = get_entity_type(entity);
2041
2042                 int align = get_type_alignment_bytes(entity_type);
2043                 if(align > align_all)
2044                         align_all = align;
2045                 int misalign = 0;
2046                 if(align > 0) {
2047                         misalign  = offset % align;
2048                         offset   += misalign;
2049                 }
2050
2051                 set_entity_offset(entity, offset);
2052                 offset += get_type_size_bytes(entity_type);
2053         }
2054         set_type_size_bytes(frame_type, offset);
2055         set_type_alignment_bytes(frame_type, align_all);
2056         set_type_state(frame_type, layout_fixed);
2057
2058         irg_vrfy(irg);
2059 }
2060
2061 static void create_global_variable(declaration_t *declaration)
2062 {
2063         ir_type   *global_type = get_glob_type();
2064         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
2065                                   global_type);
2066
2067         ir_entity *entity = declaration->v.entity;
2068         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
2069                 set_entity_visibility(entity, visibility_local);
2070         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
2071                 set_entity_visibility(entity, visibility_external_allocated);
2072         } else {
2073                 set_entity_visibility(entity, visibility_external_visible);
2074         }
2075         current_ir_graph = get_const_code_irg();
2076         create_initializer(declaration);
2077 }
2078
2079 static void context_to_firm(context_t *context)
2080 {
2081         declaration_t *declaration = context->declarations;
2082         for( ; declaration != NULL; declaration = declaration->next) {
2083                 if(declaration->namespace != NAMESPACE_NORMAL)
2084                         continue;
2085                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2086                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2087                         continue;
2088                 if(declaration->symbol == NULL)
2089                         continue;
2090
2091                 type_t *type = declaration->type;
2092                 if(type->type == TYPE_FUNCTION) {
2093                         create_function(declaration);
2094                 } else {
2095                         create_global_variable(declaration);
2096                 }
2097         }
2098 }
2099
2100 void translation_unit_to_firm(translation_unit_t *unit)
2101 {
2102         /* remove me later TODO FIXME */
2103         (void) get_type_size;
2104
2105         /* just to be sure */
2106         continue_label      = NULL;
2107         break_label         = NULL;
2108         current_switch_cond = NULL;
2109
2110         context_to_firm(& unit->context);
2111 }