nsz Git - cparser/blob - ast2firm.c

   1 #include <config.h>
   2
   3 #define _GNU_SOURCE
   4
   5 #include <assert.h>
   6 #include <string.h>
   7 #include <stdbool.h>
   8
   9 #include <libfirm/firm.h>
  10 #include <libfirm/adt/obst.h>
  11
  12 #include "ast2firm.h"
  13
  14 #include "adt/error.h"
  15 #include "adt/array.h"
  16 #include "token_t.h"
  17 #include "type_t.h"
  18 #include "ast_t.h"
  19
  20 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  21
  22 static ir_type *ir_type_const_char;
  23 static ir_type *ir_type_void;
  24 static ir_type *ir_type_int;
  25 static ir_type *ir_type_void_ptr;
  26
  27 static type_t *type_const_char;
  28 static type_t *type_void;
  29 static type_t *type_int;
  30
  31 static int       next_value_number_function;
  32 static ir_node  *continue_label;
  33 static ir_node  *break_label;
  34 static ir_node  *current_switch_cond;
  35 static bool      saw_default_label;
  36 static ir_node **imature_blocks;
  37
  38 typedef enum declaration_type_t {
  39         DECLARATION_TYPE_UNKNOWN,
  40         DECLARATION_TYPE_FUNCTION,
  41         DECLARATION_TYPE_GLOBAL_VARIABLE,
  42         DECLARATION_TYPE_LOCAL_VARIABLE,
  43         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  44         DECLARATION_TYPE_COMPOUND_MEMBER,
  45         DECLARATION_TYPE_LABEL_BLOCK,
  46 } declaration_type_t;
  47
  48 static ir_type *get_ir_type(type_t *type);
  49
  50 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  51 {
  52         (void) pos;
  53 #if 0
  54         const declaration_t *declaration = & value_numbers[pos]->declaration;
  55
  56         print_warning_prefix(declaration->source_position);
  57         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  58                         declaration->symbol->string);
  59 #endif
  60         fprintf(stderr, "Some variable might be used uninitialized\n");
  61         return new_r_Unknown(irg, mode);
  62 }
  63
  64 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  65 {
  66         const source_position_t *pos = (const source_position_t*) dbg;
  67         if(pos == NULL)
  68                 return 0;
  69         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  70                                    pos->linenr);
  71 }
  72
  73 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  74 {
  75         const source_position_t *pos = (const source_position_t*) dbg;
  76         if(pos == NULL)
  77                 return NULL;
  78         if(line != NULL)
  79                 *line = pos->linenr;
  80         return pos->input_name;
  81 }
  82
  83 void init_ast2firm(void)
  84 {
  85         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  86         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, 0);
  87         type_int        = make_atomic_type(ATOMIC_TYPE_INT, 0);
  88
  89         ir_type_int        = get_ir_type(type_int);
  90         ir_type_const_char = get_ir_type(type_const_char);
  91         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  92                                                        type in firm */
  93         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
  94                                               ir_type_void, mode_P_data);
  95
  96         type_void->firm_type = ir_type_void;
  97 }
  98
  99 void exit_ast2firm(void)
 100 {
 101 }
 102
 103 static unsigned unique_id = 0;
 104
 105 static ident *unique_ident(const char *tag)
 106 {
 107         char buf[256];
 108
 109         snprintf(buf, sizeof(buf), "%s.%d", tag, unique_id);
 110         unique_id++;
 111         return new_id_from_str(buf);
 112 }
 113
 114 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 115 {
 116         switch(atomic_type->atype) {
 117         case ATOMIC_TYPE_SCHAR:
 118         case ATOMIC_TYPE_CHAR:
 119                 return mode_Bs;
 120         case ATOMIC_TYPE_UCHAR:
 121                 return mode_Bu;
 122         case ATOMIC_TYPE_SHORT:
 123                 return mode_Hs;
 124         case ATOMIC_TYPE_USHORT:
 125                 return mode_Hu;
 126         case ATOMIC_TYPE_LONG:
 127         case ATOMIC_TYPE_INT:
 128                 return mode_Is;
 129         case ATOMIC_TYPE_ULONG:
 130         case ATOMIC_TYPE_UINT:
 131                 return mode_Iu;
 132         case ATOMIC_TYPE_LONGLONG:
 133                 return mode_Ls;
 134         case ATOMIC_TYPE_ULONGLONG:
 135                 return mode_Lu;
 136         case ATOMIC_TYPE_FLOAT:
 137                 return mode_F;
 138         case ATOMIC_TYPE_DOUBLE:
 139                 return mode_D;
 140         case ATOMIC_TYPE_LONG_DOUBLE:
 141                 return mode_E;
 142         case ATOMIC_TYPE_BOOL:
 143                 return mode_b;
 144 #ifdef PROVIDE_COMPLEX
 145         case ATOMIC_TYPE_FLOAT_COMPLEX:
 146         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 147         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 148                 panic("complex lowering not implemented yet");
 149                 break;
 150         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 151         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 152         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 153                 panic("imaginary lowering not implemented yet");
 154                 break;
 155 #endif
 156         case ATOMIC_TYPE_VOID:
 157                 /* firm has no real void... */
 158                 return mode_Is;
 159         case ATOMIC_TYPE_INVALID:
 160                 break;
 161         }
 162         panic("Encountered unknown atomic type");
 163 }
 164
 165
 166 static unsigned get_type_size(type_t *type);
 167
 168 static unsigned get_atomic_type_size(const atomic_type_t *type)
 169 {
 170         switch(type->atype) {
 171         case ATOMIC_TYPE_CHAR:
 172         case ATOMIC_TYPE_SCHAR:
 173         case ATOMIC_TYPE_UCHAR:
 174                 return 1;
 175
 176         case ATOMIC_TYPE_SHORT:
 177         case ATOMIC_TYPE_USHORT:
 178                 return 2;
 179
 180         case ATOMIC_TYPE_BOOL:
 181         case ATOMIC_TYPE_INT:
 182         case ATOMIC_TYPE_UINT:
 183         case ATOMIC_TYPE_LONG:
 184         case ATOMIC_TYPE_ULONG:
 185         case ATOMIC_TYPE_FLOAT:
 186                 return 4;
 187
 188         case ATOMIC_TYPE_LONGLONG:
 189         case ATOMIC_TYPE_ULONGLONG:
 190         case ATOMIC_TYPE_DOUBLE:
 191                 return 8;
 192
 193         case ATOMIC_TYPE_LONG_DOUBLE:
 194                 return 12;
 195
 196         case ATOMIC_TYPE_VOID:
 197                 return 1;
 198
 199         case ATOMIC_TYPE_INVALID:
 200                 break;
 201         }
 202         panic("Trying to determine size of invalid atomic type");
 203 }
 204
 205 static unsigned get_compound_type_size(compound_type_t *type)
 206 {
 207         ir_type *irtype = get_ir_type(&type->type);
 208         return get_type_size_bytes(irtype);
 209 }
 210
 211 static unsigned get_array_type_size(array_type_t *type)
 212 {
 213         ir_type *irtype = get_ir_type(&type->type);
 214         return get_type_size_bytes(irtype);
 215 }
 216
 217 static unsigned get_type_size(type_t *type)
 218 {
 219         type = skip_typeref(type);
 220
 221         switch(type->type) {
 222         case TYPE_ATOMIC:
 223                 return get_atomic_type_size((const atomic_type_t*) type);
 224         case TYPE_ENUM:
 225                 return get_mode_size_bytes(mode_Is);
 226         case TYPE_COMPOUND_UNION:
 227         case TYPE_COMPOUND_STRUCT:
 228                 return get_compound_type_size((compound_type_t*) type);
 229         case TYPE_FUNCTION:
 230                 /* just a pointer to the function */
 231                 return get_mode_size_bytes(mode_P_code);
 232         case TYPE_POINTER:
 233                 return get_mode_size_bytes(mode_P_data);
 234         case TYPE_ARRAY:
 235                 return get_array_type_size((array_type_t*) type);
 236         case TYPE_BUILTIN:
 237         case TYPE_TYPEDEF:
 238         case TYPE_TYPEOF:
 239         case TYPE_INVALID:
 240                 break;
 241         }
 242         panic("Trying to determine size of invalid type");
 243 }
 244
 245 static unsigned count_parameters(const function_type_t *function_type)
 246 {
 247         unsigned count = 0;
 248
 249         function_parameter_t *parameter = function_type->parameters;
 250         for ( ; parameter != NULL; parameter = parameter->next) {
 251                 ++count;
 252         }
 253
 254         return count;
 255 }
 256
 257
 258
 259
 260 static long fold_constant(const expression_t *expression);
 261
 262 static ir_type *create_atomic_type(const atomic_type_t *type)
 263 {
 264         ir_mode *mode   = get_atomic_mode(type);
 265         ident   *id     = get_mode_ident(mode);
 266         ir_type *irtype = new_type_primitive(id, mode);
 267
 268         return irtype;
 269 }
 270
 271 static ir_type *create_method_type(const function_type_t *function_type)
 272 {
 273         type_t  *result_type  = function_type->result_type;
 274
 275         ident   *id           = unique_ident("functiontype");
 276         int      n_parameters = count_parameters(function_type);
 277         int      n_results    = result_type == type_void ? 0 : 1;
 278         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 279
 280         if(result_type != type_void) {
 281                 ir_type *restype = get_ir_type(result_type);
 282                 set_method_res_type(irtype, 0, restype);
 283         }
 284
 285         function_parameter_t *parameter = function_type->parameters;
 286         int                   n         = 0;
 287         for( ; parameter != NULL; parameter = parameter->next) {
 288                 ir_type *p_irtype = get_ir_type(parameter->type);
 289                 set_method_param_type(irtype, n, p_irtype);
 290                 ++n;
 291         }
 292
 293         if(function_type->variadic || function_type->unspecified_parameters) {
 294                 set_method_variadicity(irtype, variadicity_variadic);
 295         }
 296
 297         return irtype;
 298 }
 299
 300 static ir_type *create_pointer_type(pointer_type_t *type)
 301 {
 302         type_t  *points_to = type->points_to;
 303         ir_type *ir_points_to;
 304         /* Avoid endless recursion if the points_to type contains this poiner type
 305          * again (might be a struct). We therefore first create a void* pointer
 306          * and then set the real points_to type
 307          */
 308         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 309                                             ir_type_void, mode_P_data);
 310         type->type.firm_type  = ir_type;
 311
 312         ir_points_to = get_ir_type(points_to);
 313         set_pointer_points_to_type(ir_type, ir_points_to);
 314
 315         return ir_type;
 316 }
 317
 318 static ir_type *create_array_type(array_type_t *type)
 319 {
 320         type_t  *element_type    = type->element_type;
 321         ir_type *ir_element_type = get_ir_type(element_type);
 322
 323         ident   *id      = unique_ident("array");
 324         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 325
 326         if(type->size != NULL) {
 327                 int n_elements = fold_constant(type->size);
 328
 329                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 330
 331                 size_t elemsize = get_type_size_bytes(ir_element_type);
 332                 int align = get_type_alignment_bytes(ir_element_type);
 333                 if(elemsize % align > 0) {
 334                         elemsize += align - (elemsize % align);
 335                 }
 336                 set_type_size_bytes(ir_type, n_elements * elemsize);
 337                 set_type_alignment_bytes(ir_type, align);
 338                 set_type_state(ir_type, layout_fixed);
 339         }
 340
 341         return ir_type;
 342 }
 343
 344 #define INVALID_TYPE ((ir_type_ptr)-1)
 345
 346 static ir_type *create_struct_type(compound_type_t *type)
 347 {
 348         symbol_t *symbol = type->declaration->symbol;
 349         ident    *id;
 350         if(symbol != NULL) {
 351                 id = unique_ident(symbol->string);
 352         } else {
 353                 id = unique_ident("__anonymous_struct");
 354         }
 355         ir_type *ir_type = new_type_struct(id);
 356
 357         type->type.firm_type = ir_type;
 358
 359         int align_all = 1;
 360         int offset    = 0;
 361         declaration_t *entry = type->declaration->context.declarations;
 362         for( ; entry != NULL; entry = entry->next) {
 363                 if(entry->namespace != NAMESPACE_NORMAL)
 364                         continue;
 365
 366                 ident       *ident         = new_id_from_str(entry->symbol->string);
 367                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 368
 369                 int entry_size      = get_type_size_bytes(entry_ir_type);
 370                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 371                 int misalign = offset % entry_alignment;
 372                 offset += misalign;
 373
 374                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 375                 set_entity_offset(entity, offset);
 376                 add_struct_member(ir_type, entity);
 377                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 378                 entry->v.entity         = entity;
 379
 380                 offset += entry_size;
 381                 if(entry_alignment > align_all) {
 382                         if(entry_alignment % align_all != 0) {
 383                                 panic("Uneven alignments not supported yet");
 384                         }
 385                         align_all = entry_alignment;
 386                 }
 387         }
 388
 389         int misalign = offset % align_all;
 390         offset += misalign;
 391         set_type_alignment_bytes(ir_type, align_all);
 392         set_type_size_bytes(ir_type, offset);
 393         set_type_state(ir_type, layout_fixed);
 394
 395         return ir_type;
 396 }
 397
 398 static ir_type *create_union_type(compound_type_t *type)
 399 {
 400         declaration_t *declaration = type->declaration;
 401         symbol_t      *symbol      = declaration->symbol;
 402         ident         *id;
 403         if(symbol != NULL) {
 404                 id = unique_ident(symbol->string);
 405         } else {
 406                 id = unique_ident("__anonymous_union");
 407         }
 408         ir_type  *ir_type = new_type_union(id);
 409
 410         type->type.firm_type = ir_type;
 411
 412         int align_all = 1;
 413         int size      = 0;
 414         declaration_t *entry = declaration->context.declarations;
 415         for( ; entry != NULL; entry = entry->next) {
 416                 if(entry->namespace != NAMESPACE_NORMAL)
 417                         continue;
 418
 419                 ident       *ident         = new_id_from_str(entry->symbol->string);
 420                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 421
 422                 int entry_size      = get_type_size_bytes(entry_ir_type);
 423                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 424
 425                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 426                 add_union_member(ir_type, entity);
 427                 set_entity_offset(entity, 0);
 428                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 429                 entry->v.entity         = entity;
 430
 431                 if(entry_size > size) {
 432                         size = entry_size;
 433                 }
 434                 if(entry_alignment > align_all) {
 435                         if(entry_alignment % align_all != 0) {
 436                                 panic("Uneven alignments not supported yet");
 437                         }
 438                         align_all = entry_alignment;
 439                 }
 440         }
 441
 442         set_type_alignment_bytes(ir_type, align_all);
 443         set_type_size_bytes(ir_type, size);
 444         set_type_state(ir_type, layout_fixed);
 445
 446         return ir_type;
 447 }
 448
 449 static ir_type *get_ir_type(type_t *type)
 450 {
 451         assert(type != NULL);
 452
 453         type = skip_typeref(type);
 454
 455         if(type->firm_type != NULL) {
 456                 assert(type->firm_type != INVALID_TYPE);
 457                 return type->firm_type;
 458         }
 459
 460         ir_type *firm_type = NULL;
 461         switch(type->type) {
 462         case TYPE_ATOMIC:
 463                 firm_type = create_atomic_type((atomic_type_t*) type);
 464                 break;
 465         case TYPE_FUNCTION:
 466                 firm_type = create_method_type((function_type_t*) type);
 467                 break;
 468         case TYPE_POINTER:
 469                 firm_type = create_pointer_type((pointer_type_t*) type);
 470                 break;
 471         case TYPE_ARRAY:
 472                 firm_type = create_array_type((array_type_t*) type);
 473                 break;
 474         case TYPE_COMPOUND_STRUCT:
 475                 firm_type = create_struct_type((compound_type_t*) type);
 476                 break;
 477         case TYPE_COMPOUND_UNION:
 478                 firm_type = create_union_type((compound_type_t*) type);
 479                 break;
 480         case TYPE_ENUM:
 481                 firm_type = ir_type_int;
 482                 break;
 483         case TYPE_BUILTIN:
 484         case TYPE_TYPEOF:
 485         case TYPE_TYPEDEF:
 486         case TYPE_INVALID:
 487                 break;
 488         }
 489         if(firm_type == NULL)
 490                 panic("unknown type found");
 491
 492         type->firm_type = firm_type;
 493         return firm_type;
 494 }
 495
 496 static inline ir_mode *get_ir_mode(type_t *type)
 497 {
 498         ir_type *irtype = get_ir_type(type);
 499
 500         /* firm doesn't report a mode for arrays somehow... */
 501         if(is_Array_type(irtype)) {
 502                 return mode_P;
 503         }
 504
 505         ir_mode *mode = get_type_mode(irtype);
 506         assert(mode != NULL);
 507         return mode;
 508 }
 509
 510 static ir_entity* get_function_entity(declaration_t *declaration)
 511 {
 512         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 513                 return declaration->v.entity;
 514         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 515
 516         symbol_t *symbol = declaration->symbol;
 517         ident    *id     = new_id_from_str(symbol->string);
 518
 519         ir_type  *global_type    = get_glob_type();
 520         ir_type  *ir_type_method = get_ir_type(declaration->type);
 521         assert(is_Method_type(ir_type_method));
 522
 523         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 524         set_entity_ld_ident(entity, id);
 525         if(declaration->storage_class == STORAGE_CLASS_STATIC
 526                         || declaration->is_inline) {
 527                 set_entity_visibility(entity, visibility_local);
 528         } else if(declaration->init.statement != NULL) {
 529                 set_entity_visibility(entity, visibility_external_visible);
 530         } else {
 531                 set_entity_visibility(entity, visibility_external_allocated);
 532         }
 533
 534         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 535         declaration->v.entity         = entity;
 536
 537         return entity;
 538 }
 539
 540
 541
 542 static ir_node *expression_to_firm(const expression_t *expression);
 543 static ir_node *expression_to_modeb(const expression_t *expression);
 544
 545 static dbg_info *get_dbg_info(const source_position_t *pos)
 546 {
 547         return (dbg_info*) pos;
 548 }
 549
 550 static ir_node *const_to_firm(const const_t *cnst)
 551 {
 552         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 553         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 554
 555         tarval   *tv;
 556         if(mode_is_float(mode)) {
 557                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 558         } else {
 559                 tv = new_tarval_from_long(cnst->v.int_value, mode);
 560         }
 561
 562         return new_d_Const(dbgi, mode, tv);
 563 }
 564
 565 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 566 {
 567         assert(entity != NULL);
 568         union symconst_symbol sym;
 569         sym.entity_p = entity;
 570         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 571 }
 572
 573 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 574 {
 575         ir_type   *global_type = get_glob_type();
 576         ir_type   *type        = new_type_array(unique_ident("strtype"), 1,
 577                                                 ir_type_const_char);
 578
 579         ident     *id     = unique_ident("Lstr");
 580         ir_entity *entity = new_entity(global_type, id, type);
 581         set_entity_ld_ident(entity, id);
 582         set_entity_variability(entity, variability_constant);
 583
 584         ir_type    *elem_type = ir_type_const_char;
 585         ir_mode    *mode      = get_type_mode(elem_type);
 586
 587         const char *string = literal->value;
 588         size_t      slen   = strlen(string) + 1;
 589
 590         set_array_lower_bound_int(type, 0, 0);
 591         set_array_upper_bound_int(type, 0, slen);
 592         set_type_size_bytes(type, slen);
 593         set_type_state(type, layout_fixed);
 594
 595         tarval **tvs = xmalloc(slen * sizeof(tvs[0]));
 596         for(size_t i = 0; i < slen; ++i) {
 597                 tvs[i] = new_tarval_from_long(string[i], mode);
 598         }
 599
 600         set_array_entity_values(entity, tvs, slen);
 601         free(tvs);
 602
 603         dbg_info *dbgi = get_dbg_info(&literal->expression.source_position);
 604
 605         return create_symconst(dbgi, entity);
 606 }
 607
 608 static ir_node *load_from_expression_addr(type_t *type, ir_node *addr,
 609                                           dbg_info *dbgi)
 610 {
 611         ir_mode *mode     = get_ir_mode(type);
 612         ir_node *memory   = get_store();
 613         ir_node *load     = new_d_Load(dbgi, memory, addr, mode);
 614         ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 615         ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
 616         set_store(load_mem);
 617
 618         return load_res;
 619 }
 620
 621 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 622 {
 623         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 624         declaration_t *declaration = ref->declaration;
 625         type_t        *type        = skip_typeref(declaration->type);
 626
 627         switch((declaration_type_t) declaration->declaration_type) {
 628         case DECLARATION_TYPE_UNKNOWN:
 629                 break;
 630         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 631                 ir_mode *mode = get_ir_mode(type);
 632                 return get_value(declaration->v.value_number, mode);
 633         }
 634         case DECLARATION_TYPE_FUNCTION: {
 635                 return create_symconst(dbgi, declaration->v.entity);
 636         }
 637         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 638                 ir_entity *entity   = declaration->v.entity;
 639                 ir_node   *symconst = create_symconst(dbgi, entity);
 640
 641                 if(type->type == TYPE_ARRAY) {
 642                         return symconst;
 643                 } else {
 644                         return load_from_expression_addr(type, symconst, dbgi);
 645                 }
 646         }
 647         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 648                 ir_entity *entity = declaration->v.entity;
 649                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 650                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 651
 652                 if(type->type == TYPE_ARRAY || type->type == TYPE_COMPOUND_STRUCT
 653                                 || type->type == TYPE_COMPOUND_UNION) {
 654                         return sel;
 655                 } else {
 656                         return load_from_expression_addr(type, sel, dbgi);
 657                 }
 658         }
 659
 660         case DECLARATION_TYPE_COMPOUND_MEMBER:
 661         case DECLARATION_TYPE_LABEL_BLOCK:
 662                 panic("not implemented reference type");
 663         }
 664
 665         panic("reference to declaration with unknown type found");
 666 }
 667
 668 static ir_node *reference_addr(const reference_expression_t *ref)
 669 {
 670         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 671         declaration_t *declaration = ref->declaration;
 672
 673         switch((declaration_type_t) declaration->declaration_type) {
 674         case DECLARATION_TYPE_UNKNOWN:
 675                 break;
 676         case DECLARATION_TYPE_LOCAL_VARIABLE:
 677                 panic("local variable without entity has no address");
 678         case DECLARATION_TYPE_FUNCTION: {
 679                 return create_symconst(dbgi, declaration->v.entity);
 680         }
 681         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 682                 ir_entity *entity   = declaration->v.entity;
 683                 ir_node   *symconst = create_symconst(dbgi, entity);
 684                 return symconst;
 685         }
 686         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 687                 ir_entity *entity = declaration->v.entity;
 688                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 689                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 690
 691                 return sel;
 692         }
 693         case DECLARATION_TYPE_COMPOUND_MEMBER:
 694         case DECLARATION_TYPE_LABEL_BLOCK:
 695                 panic("not implemented reference type");
 696         }
 697
 698         panic("reference to declaration with unknown type found");
 699 }
 700
 701 static ir_node *call_expression_to_firm(const call_expression_t *call)
 702 {
 703         assert(get_cur_block() != NULL);
 704
 705         expression_t  *function = call->function;
 706         ir_node       *callee   = expression_to_firm(function);
 707
 708         assert(function->datatype->type == TYPE_FUNCTION);
 709         function_type_t *function_type = (function_type_t*) function->datatype;
 710
 711         int              n_parameters = 0;
 712         call_argument_t *argument     = call->arguments;
 713         for( ; argument != NULL; argument = argument->next) {
 714                 ++n_parameters;
 715         }
 716
 717         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 718         ir_type *new_method_type = NULL;
 719         if(function_type->variadic || function_type->unspecified_parameters) {
 720                 /* we need to construct a new method type matching the call
 721                  * arguments... */
 722                 int n_res       = get_method_n_ress(ir_method_type);
 723                 new_method_type = new_type_method(unique_ident("calltype"),
 724                                                   n_parameters, n_res);
 725                 set_method_calling_convention(new_method_type,
 726                                get_method_calling_convention(ir_method_type));
 727                 set_method_additional_properties(new_method_type,
 728                                get_method_additional_properties(ir_method_type));
 729
 730                 for(int i = 0; i < n_res; ++i) {
 731                         set_method_res_type(new_method_type, i,
 732                                             get_method_res_type(ir_method_type, i));
 733                 }
 734         }
 735         ir_node *in[n_parameters];
 736
 737         argument = call->arguments;
 738         int n = 0;
 739         for( ; argument != NULL; argument = argument->next) {
 740                 expression_t *expression = argument->expression;
 741                 ir_node      *arg_node   = expression_to_firm(expression);
 742
 743                 in[n] = arg_node;
 744                 if(new_method_type != NULL) {
 745                         ir_type *irtype = get_ir_type(expression->datatype);
 746                         set_method_param_type(new_method_type, n, irtype);
 747                 }
 748
 749                 n++;
 750         }
 751         assert(n == n_parameters);
 752
 753         if(new_method_type != NULL)
 754                 ir_method_type = new_method_type;
 755
 756         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 757         ir_node  *store = get_store();
 758         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 759                                      ir_method_type);
 760         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 761         set_store(mem);
 762
 763         type_t  *result_type = function_type->result_type;
 764         ir_node *result      = NULL;
 765         if(result_type != type_void) {
 766                 ir_mode *mode    = get_ir_mode(result_type);
 767                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 768                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 769         }
 770
 771         return result;
 772 }
 773
 774 static ir_node *expression_to_addr(const expression_t *expression);
 775
 776 static void set_value_for_expression(const expression_t *expression,
 777                                      ir_node *value)
 778 {
 779         if(expression->type == EXPR_REFERENCE) {
 780                 reference_expression_t *ref = (reference_expression_t*) expression;
 781
 782                 declaration_t *declaration = ref->declaration;
 783                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 784                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 785                         set_value(declaration->v.value_number, value);
 786                         return;
 787                 }
 788         }
 789
 790         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 791         ir_node  *addr      = expression_to_addr(expression);
 792         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 793         ir_node  *memory    = get_store();
 794         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 795         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 796         set_store(store_mem);
 797 }
 798
 799 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 800 {
 801         ir_mode *value_mode = get_irn_mode(value);
 802
 803         if(value_mode == dest_mode)
 804                 return value;
 805
 806         if(dest_mode == mode_b) {
 807                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 808                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 809                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 810                 return proj;
 811         }
 812
 813         return new_d_Conv(dbgi, value, dest_mode);
 814 }
 815
 816 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 817 {
 818         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 819         type_t   *type = expression->expression.datatype;
 820         ir_mode  *mode = get_ir_mode(type);
 821
 822         if(expression->type == UNEXPR_TAKE_ADDRESS)
 823                 return expression_to_addr(expression->value);
 824
 825         const expression_t *value      = expression->value;
 826         ir_node            *value_node = expression_to_firm(value);
 827
 828         switch(expression->type) {
 829         case UNEXPR_NEGATE:
 830                 return new_d_Minus(dbgi, value_node, mode);
 831         case UNEXPR_PLUS:
 832                 return value_node;
 833         case UNEXPR_BITWISE_NEGATE:
 834                 return new_d_Not(dbgi, value_node, mode);
 835         case UNEXPR_NOT:
 836                 if(get_irn_mode(value_node) != mode_b) {
 837                         value_node = create_conv(dbgi, value_node, mode_b);
 838                 }
 839                 value_node = new_d_Not(dbgi, value_node, mode_b);
 840                 if(mode != mode_b) {
 841                         value_node = create_conv(dbgi, value_node, mode);
 842                 }
 843                 return value_node;
 844         case UNEXPR_DEREFERENCE:
 845                 return load_from_expression_addr(type, value_node, dbgi);
 846         case UNEXPR_POSTFIX_INCREMENT: {
 847                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 848                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 849                 set_value_for_expression(value, new_value);
 850                 return value_node;
 851         }
 852         case UNEXPR_POSTFIX_DECREMENT: {
 853                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 854                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 855                 set_value_for_expression(value, new_value);
 856                 return value_node;
 857         }
 858         case UNEXPR_PREFIX_INCREMENT: {
 859                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 860                 ir_node *new_value = new_d_Add(dbgi, value_node, one, mode);
 861                 set_value_for_expression(value, new_value);
 862                 return new_value;
 863         }
 864         case UNEXPR_PREFIX_DECREMENT: {
 865                 ir_node *one       = new_Const(mode, get_mode_one(mode));
 866                 ir_node *new_value = new_d_Sub(dbgi, value_node, one, mode);
 867                 set_value_for_expression(value, new_value);
 868                 return new_value;
 869         }
 870         case UNEXPR_CAST:
 871                 return create_conv(dbgi, value_node, mode);
 872
 873         case UNEXPR_TAKE_ADDRESS:
 874         case UNEXPR_INVALID:
 875                 break;
 876         }
 877         panic("invalid UNEXPR type found");
 878 }
 879
 880 static long get_pnc(binary_expression_type_t type)
 881 {
 882         switch(type) {
 883         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 884         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 885         case BINEXPR_LESS:         return pn_Cmp_Lt;
 886         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 887         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 888         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 889         default:
 890                 break;
 891         }
 892         panic("trying to get pn_Cmp from non-comparison binexpr type");
 893 }
 894
 895 static ir_node *create_lazy_op(const binary_expression_t *expression)
 896 {
 897         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 898
 899         bool is_or = (expression->type == BINEXPR_LOGICAL_OR);
 900         assert(is_or || expression->type == BINEXPR_LOGICAL_AND);
 901
 902         ir_node  *val1       = expression_to_modeb(expression->left);
 903         ir_node  *cond       = new_d_Cond(dbgi, val1);
 904         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
 905         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
 906
 907         ir_node *fallthrough_block = new_immBlock();
 908
 909         /* the true case */
 910         ir_node *calc_val2_block = new_immBlock();
 911         if(is_or) {
 912                 add_immBlock_pred(calc_val2_block, false_proj);
 913         } else {
 914                 add_immBlock_pred(calc_val2_block, true_proj);
 915         }
 916
 917         mature_immBlock(calc_val2_block);
 918
 919         ir_node *val2 = expression_to_modeb(expression->right);
 920         if(get_cur_block() != NULL) {
 921                 ir_node *jmp = new_d_Jmp(dbgi);
 922                 add_immBlock_pred(fallthrough_block, jmp);
 923         }
 924
 925         /* fallthrough */
 926         ir_node *constb;
 927         if(is_or) {
 928                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_true());
 929                 add_immBlock_pred(fallthrough_block, true_proj);
 930         } else {
 931                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_false());
 932                 add_immBlock_pred(fallthrough_block, false_proj);
 933         }
 934         mature_immBlock(fallthrough_block);
 935
 936         set_cur_block(fallthrough_block);
 937
 938         ir_node *in[2] = { val2, constb };
 939         ir_node *val   = new_d_Phi(dbgi, 2, in, mode_b);
 940
 941         return val;
 942 }
 943
 944 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
 945                                             ir_node *right, ir_mode *mode);
 946
 947 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
 948                                         create_arithmetic_func func)
 949 {
 950         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 951         ir_node  *left  = expression_to_firm(expression->left);
 952         ir_node  *right = expression_to_firm(expression->right);
 953         type_t   *type  = expression->right->datatype;
 954         /* be careful with the modes, because in asithmetic assign nodes only
 955          * the right operand has the mode of the arithmetic alread */
 956         ir_mode  *mode  = get_ir_mode(type);
 957         left            = create_conv(dbgi, left, mode);
 958         ir_node  *res   = func(dbgi, left, right, mode);
 959
 960         return res;
 961 }
 962
 963 static ir_node *create_arithmetic_assign_binop(
 964                 const binary_expression_t *expression, create_arithmetic_func func)
 965 {
 966         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 967         ir_node  *value = create_arithmetic_binop(expression, func);
 968         type_t   *type  = expression->expression.datatype;
 969         ir_mode  *mode  = get_ir_mode(type);
 970
 971         assert(type->type != TYPE_POINTER);
 972
 973         value = create_conv(dbgi, value, mode);
 974         set_value_for_expression(expression->left, value);
 975
 976         return value;
 977 }
 978
 979 static ir_node *create_add(const binary_expression_t *expression)
 980 {
 981         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 982         ir_node  *left  = expression_to_firm(expression->left);
 983         ir_node  *right = expression_to_firm(expression->right);
 984         type_t   *type  = expression->expression.datatype;
 985         ir_mode  *mode  = get_ir_mode(type);
 986
 987         expression_t *expr_left  = expression->left;
 988         expression_t *expr_right = expression->right;
 989         type_t       *type_left  = skip_typeref(expr_left->datatype);
 990         type_t       *type_right = skip_typeref(expr_right->datatype);
 991
 992         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
 993                 return new_d_Add(dbgi, left, right, mode);
 994         }
 995
 996         ir_node        *pointer;
 997         ir_node        *integer;
 998         pointer_type_t *pointer_type;
 999         if(type_left->type == TYPE_POINTER) {
1000                 pointer      = left;
1001                 integer      = right;
1002                 pointer_type = (pointer_type_t*) type_left;
1003         } else {
1004                 assert(type_right->type == TYPE_POINTER);
1005                 pointer      = right;
1006                 integer      = left;
1007                 pointer_type = (pointer_type_t*) type_right;
1008         }
1009
1010         type_t   *points_to = pointer_type->points_to;
1011         unsigned  elem_size = get_type_size(points_to);
1012
1013         assert(elem_size >= 1);
1014         if(elem_size > 1) {
1015                 integer       = create_conv(dbgi, integer, mode_Is);
1016                 ir_node *cnst = new_Const_long(mode_Is, (int) elem_size);
1017                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
1018                 integer = mul;
1019         }
1020
1021         ir_node *res = new_d_Add(dbgi, pointer, integer, mode);
1022
1023         return res;
1024 }
1025
1026 static ir_node *create_sub(const binary_expression_t *expression)
1027 {
1028         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1029         ir_node  *left  = expression_to_firm(expression->left);
1030         ir_node  *right = expression_to_firm(expression->right);
1031         type_t   *type  = expression->expression.datatype;
1032         ir_mode  *mode  = get_ir_mode(type);
1033
1034         expression_t *expr_left  = expression->left;
1035         expression_t *expr_right = expression->right;
1036         type_t       *type_left  = skip_typeref(expr_left->datatype);
1037         type_t       *type_right = skip_typeref(expr_right->datatype);
1038
1039         if((is_type_arithmetic(type_left) && is_type_arithmetic(type_right))
1040                         || (type_left->type == TYPE_POINTER
1041                                 && type_right->type == TYPE_POINTER)) {
1042                 return new_d_Sub(dbgi, left, right, mode);
1043         }
1044
1045         assert(type_right->type == TYPE_POINTER);
1046         ir_node        *pointer      = left;
1047         ir_node        *integer      = right;
1048         pointer_type_t *pointer_type = (pointer_type_t*) type_right;
1049
1050         type_t   *points_to = pointer_type->points_to;
1051         unsigned  elem_size = get_type_size(points_to);
1052
1053         assert(elem_size >= 1);
1054         if(elem_size > 1) {
1055                 ir_node *cnst = new_Const_long(mode_Iu, elem_size);
1056                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Iu);
1057                 integer = mul;
1058         }
1059
1060         ir_node *res = new_d_Sub(dbgi, pointer, integer, mode);
1061
1062         return res;
1063 }
1064
1065 static ir_node *create_shift(const binary_expression_t *expression)
1066 {
1067         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1068         ir_node  *left  = expression_to_firm(expression->left);
1069         ir_node  *right = expression_to_firm(expression->right);
1070         type_t   *type  = expression->expression.datatype;
1071         ir_mode  *mode  = get_ir_mode(type);
1072
1073         /* firm always wants the shift count to be unsigned */
1074         right = create_conv(dbgi, right, mode_Iu);
1075
1076         ir_node *res;
1077
1078         switch(expression->type) {
1079         case BINEXPR_SHIFTLEFT:
1080                 res = new_d_Shl(dbgi, left, right, mode);
1081                 break;
1082         case BINEXPR_SHIFTRIGHT: {
1083                  expression_t *expr_left = expression->left;
1084                  type_t       *type_left = skip_typeref(expr_left->datatype);
1085
1086                  if(is_type_signed(type_left)) {
1087                         res = new_d_Shrs(dbgi, left, right, mode);
1088                  } else {
1089                          res = new_d_Shr(dbgi, left, right, mode);
1090                  }
1091                  break;
1092         }
1093         default:
1094                 panic("create shift op called for non-shift op");
1095         }
1096
1097         return res;
1098 }
1099
1100
1101 static ir_node *create_divmod(const binary_expression_t *expression)
1102 {
1103         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1104         ir_node  *left  = expression_to_firm(expression->left);
1105         ir_node  *right = expression_to_firm(expression->right);
1106         ir_node  *pin   = new_Pin(new_NoMem());
1107         type_t   *type  = expression->expression.datatype;
1108         ir_mode  *mode  = get_ir_mode(type);
1109         ir_node  *op;
1110         ir_node  *res;
1111
1112         if(expression->type == BINEXPR_DIV) {
1113                 if(mode_is_float(mode)) {
1114                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1115                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1116                 } else {
1117                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1118                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1119                 }
1120         } else {
1121                 assert(expression->type == BINEXPR_MOD);
1122                 assert(!mode_is_float(mode));
1123                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1124                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1125         }
1126
1127         return res;
1128 }
1129
1130
1131
1132 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1133 {
1134         binary_expression_type_t type = expression->type;
1135         switch(type) {
1136         case BINEXPR_EQUAL:
1137         case BINEXPR_NOTEQUAL:
1138         case BINEXPR_LESS:
1139         case BINEXPR_LESSEQUAL:
1140         case BINEXPR_GREATER:
1141         case BINEXPR_GREATEREQUAL: {
1142                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1143                 ir_node *left  = expression_to_firm(expression->left);
1144                 ir_node *right = expression_to_firm(expression->right);
1145                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1146                 long     pnc   = get_pnc(type);
1147                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1148                 return proj;
1149         }
1150         case BINEXPR_ASSIGN: {
1151                 ir_node *right = expression_to_firm(expression->right);
1152                 set_value_for_expression(expression->left, right);
1153                 return right;
1154         }
1155         case BINEXPR_ADD:
1156                 return create_add(expression);
1157         case BINEXPR_SUB:
1158                 return create_sub(expression);
1159         case BINEXPR_MUL:
1160                 return create_arithmetic_binop(expression, new_d_Mul);
1161         case BINEXPR_BITWISE_AND:
1162                 return create_arithmetic_binop(expression, new_d_And);
1163         case BINEXPR_BITWISE_OR:
1164                 return create_arithmetic_binop(expression, new_d_Or);
1165         case BINEXPR_BITWISE_XOR:
1166                 return create_arithmetic_binop(expression, new_d_Eor);
1167         case BINEXPR_SHIFTLEFT:
1168         case BINEXPR_SHIFTRIGHT:
1169                 return create_shift(expression);
1170         case BINEXPR_DIV:
1171         case BINEXPR_MOD:
1172                 return create_divmod(expression);
1173         case BINEXPR_LOGICAL_AND:
1174         case BINEXPR_LOGICAL_OR:
1175                 return create_lazy_op(expression);
1176         case BINEXPR_COMMA:
1177                 expression_to_firm(expression->left);
1178                 return expression_to_firm(expression->right);
1179         case BINEXPR_ADD_ASSIGN:
1180                 return create_arithmetic_assign_binop(expression, new_d_Add);
1181         case BINEXPR_SUB_ASSIGN:
1182                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1183         case BINEXPR_MUL_ASSIGN:
1184                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1185         case BINEXPR_BITWISE_AND_ASSIGN:
1186                 return create_arithmetic_assign_binop(expression, new_d_And);
1187         case BINEXPR_BITWISE_OR_ASSIGN:
1188                 return create_arithmetic_assign_binop(expression, new_d_Or);
1189         case BINEXPR_BITWISE_XOR_ASSIGN:
1190                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1191         case BINEXPR_SHIFTLEFT_ASSIGN:
1192                 return create_arithmetic_assign_binop(expression, new_d_Shl);
1193         case BINEXPR_SHIFTRIGHT_ASSIGN:
1194                 return create_arithmetic_assign_binop(expression, new_d_Shr);
1195         default:
1196                 panic("TODO binexpr type");
1197         }
1198 }
1199
1200 static ir_node *array_access_addr(const array_access_expression_t *expression)
1201 {
1202         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1203
1204         ir_node *base_addr = expression_to_firm(expression->array_ref);
1205         ir_node *offset    = expression_to_firm(expression->index);
1206         offset             = create_conv(dbgi, offset, mode_Iu);
1207
1208         unsigned elem_size       = get_type_size(expression->expression.datatype);
1209         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1210         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1211                                              mode_Iu);
1212         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1213
1214         return result;
1215 }
1216
1217 static ir_node *array_access_to_firm(
1218                 const array_access_expression_t *expression)
1219 {
1220         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1221         ir_node  *addr = array_access_addr(expression);
1222         type_t   *type = expression->expression.datatype;
1223
1224         return load_from_expression_addr(type, addr, dbgi);
1225 }
1226
1227 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1228 {
1229         type_t *type = expression->type;
1230         if(type == NULL) {
1231                 type = expression->size_expression->datatype;
1232                 assert(type != NULL);
1233         }
1234
1235         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1236         unsigned  size      = get_type_size(type);
1237         ir_node  *size_node = new_Const_long(mode, size);
1238
1239         return size_node;
1240 }
1241
1242 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1243 {
1244         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1245
1246         ir_node *condition  = expression_to_modeb(expression->condition);
1247         ir_node *cond       = new_d_Cond(dbgi, condition);
1248         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1249         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1250
1251         /* create the true block */
1252         ir_node *true_block = new_immBlock();
1253         add_immBlock_pred(true_block, true_proj);
1254         mature_immBlock(true_block);
1255
1256         ir_node *true_val = expression_to_firm(expression->true_expression);
1257         ir_node *true_jmp = new_Jmp();
1258
1259         /* create the false block */
1260         ir_node *false_block = new_immBlock();
1261         add_immBlock_pred(false_block, false_proj);
1262         mature_immBlock(false_block);
1263
1264         ir_node *false_val = expression_to_firm(expression->false_expression);
1265         ir_node *false_jmp = new_Jmp();
1266
1267         /* create the common block */
1268         ir_node *common_block = new_immBlock();
1269         add_immBlock_pred(common_block, true_jmp);
1270         add_immBlock_pred(common_block, false_jmp);
1271         mature_immBlock(common_block);
1272
1273         ir_node *in[2] = { true_val, false_val };
1274         ir_mode *mode  = get_irn_mode(true_val);
1275         assert(get_irn_mode(false_val) == mode);
1276         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1277
1278         return val;
1279 }
1280
1281 static ir_node *select_addr(const select_expression_t *expression)
1282 {
1283         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1284
1285         ir_node *compound_addr = expression_to_firm(expression->compound);
1286
1287         declaration_t *entry = expression->compound_entry;
1288         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1289         ir_entity     *entity = entry->v.entity;
1290
1291         assert(entity != NULL);
1292
1293         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1294
1295         return sel;
1296 }
1297
1298 static ir_node *select_to_firm(const select_expression_t *expression)
1299 {
1300         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1301         ir_node  *addr = select_addr(expression);
1302         type_t   *type = expression->expression.datatype;
1303
1304         return load_from_expression_addr(type, addr, dbgi);
1305 }
1306
1307 static ir_node *dereference_addr(const unary_expression_t *const expression)
1308 {
1309         assert(expression->type == UNEXPR_DEREFERENCE);
1310         return expression_to_firm(expression->value);
1311 }
1312
1313 static ir_node *expression_to_addr(const expression_t *expression)
1314 {
1315         switch(expression->type) {
1316         case EXPR_REFERENCE:
1317                 return reference_addr((const reference_expression_t*) expression);
1318         case EXPR_ARRAY_ACCESS:
1319                 return array_access_addr((const array_access_expression_t*) expression);
1320         case EXPR_SELECT:
1321                 return select_addr((const select_expression_t*) expression);
1322         case EXPR_UNARY: {
1323                 const unary_expression_t *const unary_expr =
1324                         (const unary_expression_t*)expression;
1325                 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1326                         return dereference_addr(unary_expr);
1327                 }
1328                 break;
1329         }
1330         default:
1331                 break;
1332         }
1333         panic("trying to get address of non-lvalue");
1334 }
1335
1336 static ir_node *_expression_to_firm(const expression_t *expression)
1337 {
1338         switch(expression->type) {
1339         case EXPR_CONST:
1340                 return const_to_firm((const const_t*) expression);
1341         case EXPR_STRING_LITERAL:
1342                 return string_literal_to_firm((const string_literal_t*) expression);
1343         case EXPR_REFERENCE:
1344                 return reference_expression_to_firm(
1345                                 (const reference_expression_t*) expression);
1346         case EXPR_CALL:
1347                 return call_expression_to_firm((const call_expression_t*) expression);
1348         case EXPR_UNARY:
1349                 return unary_expression_to_firm((const unary_expression_t*) expression);
1350         case EXPR_BINARY:
1351                 return binary_expression_to_firm(
1352                                 (const binary_expression_t*) expression);
1353         case EXPR_ARRAY_ACCESS:
1354                 return array_access_to_firm(
1355                                 (const array_access_expression_t*) expression);
1356         case EXPR_SIZEOF:
1357                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1358         case EXPR_CONDITIONAL:
1359                 return conditional_to_firm((const conditional_expression_t*)expression);
1360         case EXPR_SELECT:
1361                 return select_to_firm((const select_expression_t*) expression);
1362         case EXPR_FUNCTION:
1363         case EXPR_OFFSETOF:
1364         case EXPR_PRETTY_FUNCTION:
1365         case EXPR_VA_ARG:
1366         case EXPR_STATEMENT:
1367         case EXPR_BUILTIN_SYMBOL:
1368                 panic("unimplemented expression found");
1369
1370         case EXPR_UNKNOWN:
1371         case EXPR_INVALID:
1372                 break;
1373         }
1374         panic("invalid expression found");
1375 }
1376
1377 static ir_node *expression_to_firm(const expression_t *expression)
1378 {
1379         ir_node *res = _expression_to_firm(expression);
1380
1381         if(res != NULL && get_irn_mode(res) == mode_b) {
1382                 ir_mode *mode = get_ir_mode(expression->datatype);
1383                 res           = create_conv(NULL, res, mode);
1384         }
1385
1386         return res;
1387 }
1388
1389 static ir_node *expression_to_modeb(const expression_t *expression)
1390 {
1391         ir_node *res = _expression_to_firm(expression);
1392         res          = create_conv(NULL, res, mode_b);
1393
1394         return res;
1395 }
1396
1397 static void statement_to_firm(statement_t *statement);
1398
1399 static void return_statement_to_firm(return_statement_t *statement)
1400 {
1401         if(get_cur_block() == NULL)
1402                 return;
1403
1404         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1405         ir_node  *ret;
1406
1407         if(statement->return_value != NULL) {
1408                 ir_node *retval = expression_to_firm(statement->return_value);
1409                 ir_node *in[1];
1410
1411                 in[0] = retval;
1412                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1413         } else {
1414                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1415         }
1416         ir_node *end_block = get_irg_end_block(current_ir_graph);
1417         add_immBlock_pred(end_block, ret);
1418
1419         set_cur_block(NULL);
1420 }
1421
1422 static void compound_statement_to_firm(compound_statement_t *compound)
1423 {
1424         statement_t *statement = compound->statements;
1425         for( ; statement != NULL; statement = statement->next) {
1426                 //context2firm(&statement->context);
1427                 statement_to_firm(statement);
1428         }
1429 }
1430
1431 static void expression_statement_to_firm(expression_statement_t *statement)
1432 {
1433         if(get_cur_block() == NULL)
1434                 return;
1435
1436         expression_to_firm(statement->expression);
1437 }
1438
1439 static void if_statement_to_firm(if_statement_t *statement)
1440 {
1441         dbg_info *dbgi      = get_dbg_info(&statement->statement.source_position);
1442         ir_node  *condition = expression_to_modeb(statement->condition);
1443
1444         /* make sure we have a mode_b condition */
1445         ir_node *cond       = new_d_Cond(dbgi, condition);
1446         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1447         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1448
1449         ir_node *fallthrough_block = new_immBlock();
1450
1451         /* the true (blocks) */
1452         ir_node *true_block = new_immBlock();
1453         add_immBlock_pred(true_block, true_proj);
1454         mature_immBlock(true_block);
1455
1456         statement_to_firm(statement->true_statement);
1457         if(get_cur_block() != NULL) {
1458                 ir_node *jmp = new_Jmp();
1459                 add_immBlock_pred(fallthrough_block, jmp);
1460         }
1461
1462         /* the false (blocks) */
1463         if(statement->false_statement != NULL) {
1464                 ir_node *false_block = new_immBlock();
1465                 add_immBlock_pred(false_block, false_proj);
1466                 mature_immBlock(false_block);
1467
1468                 statement_to_firm(statement->false_statement);
1469                 if(get_cur_block() != NULL) {
1470                         ir_node *jmp = new_Jmp();
1471                         add_immBlock_pred(fallthrough_block, jmp);
1472                 }
1473         } else {
1474                 add_immBlock_pred(fallthrough_block, false_proj);
1475         }
1476         mature_immBlock(fallthrough_block);
1477
1478         set_cur_block(fallthrough_block);
1479 }
1480
1481 static void while_statement_to_firm(while_statement_t *statement)
1482 {
1483         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1484
1485         ir_node *jmp = NULL;
1486         if(get_cur_block() != NULL) {
1487                 jmp = new_Jmp();
1488         }
1489
1490         /* create the header block */
1491         ir_node *header_block = new_immBlock();
1492         if(jmp != NULL) {
1493                 add_immBlock_pred(header_block, jmp);
1494         }
1495
1496         /* create the condition */
1497         ir_node *condition  = expression_to_modeb(statement->condition);
1498         ir_node *cond       = new_d_Cond(dbgi, condition);
1499         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1500         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1501
1502         /* the false block */
1503         ir_node *false_block = new_immBlock();
1504         add_immBlock_pred(false_block, false_proj);
1505
1506         /* the loop body */
1507         ir_node *body_block = new_immBlock();
1508         add_immBlock_pred(body_block, true_proj);
1509         mature_immBlock(body_block);
1510
1511         ir_node *old_continue_label = continue_label;
1512         ir_node *old_break_label    = break_label;
1513         continue_label              = header_block;
1514         break_label                 = false_block;
1515
1516         statement_to_firm(statement->body);
1517
1518         assert(continue_label == header_block);
1519         assert(break_label    == false_block);
1520         continue_label = old_continue_label;
1521         break_label    = old_break_label;
1522
1523         if(get_cur_block() != NULL) {
1524                 ir_node *jmp = new_Jmp();
1525                 add_immBlock_pred(header_block, jmp);
1526         }
1527
1528         mature_immBlock(header_block);
1529         mature_immBlock(false_block);
1530
1531         set_cur_block(false_block);
1532 }
1533
1534 static void do_while_statement_to_firm(do_while_statement_t *statement)
1535 {
1536         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1537
1538         ir_node *jmp = NULL;
1539         if(get_cur_block() != NULL) {
1540                 jmp = new_Jmp();
1541         }
1542
1543         /* create the header block */
1544         ir_node *header_block = new_immBlock();
1545
1546         /* the false block */
1547         ir_node *false_block = new_immBlock();
1548
1549         /* the loop body */
1550         ir_node *body_block = new_immBlock();
1551         if(jmp != NULL) {
1552                 add_immBlock_pred(body_block, jmp);
1553         }
1554
1555         ir_node *old_continue_label = continue_label;
1556         ir_node *old_break_label    = break_label;
1557         continue_label              = header_block;
1558         break_label                 = false_block;
1559
1560         statement_to_firm(statement->body);
1561
1562         assert(continue_label == header_block);
1563         assert(break_label    == false_block);
1564         continue_label = old_continue_label;
1565         break_label    = old_break_label;
1566
1567         if(get_cur_block() == NULL) {
1568                 mature_immBlock(header_block);
1569                 mature_immBlock(body_block);
1570                 mature_immBlock(false_block);
1571                 return;
1572         }
1573
1574         ir_node *body_jmp = new_Jmp();
1575         add_immBlock_pred(header_block, body_jmp);
1576         mature_immBlock(header_block);
1577
1578         /* create the condition */
1579         set_cur_block(header_block);
1580         ir_node *condition  = expression_to_modeb(statement->condition);
1581         ir_node *cond       = new_d_Cond(dbgi, condition);
1582         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1583         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1584
1585         add_immBlock_pred(body_block, true_proj);
1586         mature_immBlock(body_block);
1587
1588         add_immBlock_pred(false_block, false_proj);
1589         mature_immBlock(false_block);
1590
1591         set_cur_block(false_block);
1592 }
1593
1594 static void for_statement_to_firm(for_statement_t *statement)
1595 {
1596         dbg_info *const dbgi = get_dbg_info(&statement->statement.source_position);
1597
1598         ir_node *jmp = NULL;
1599         if (get_cur_block() != NULL) {
1600                 if(statement->initialisation != NULL) {
1601                         expression_to_firm(statement->initialisation);
1602                 }
1603                 jmp = new_Jmp();
1604         }
1605
1606         /* create the step block */
1607         ir_node *const step_block = new_immBlock();
1608         if (statement->step != NULL) {
1609                 expression_to_firm(statement->step);
1610         }
1611         ir_node *const step_jmp   = new_Jmp();
1612
1613         /* create the header block */
1614         ir_node *const header_block = new_immBlock();
1615         if (jmp != NULL) {
1616                 add_immBlock_pred(header_block, jmp);
1617         }
1618         add_immBlock_pred(header_block, step_jmp);
1619
1620         /* create the condition */
1621         ir_node *true_proj;
1622         ir_node *false_proj;
1623         if (statement->condition != NULL) {
1624                 ir_node *const condition  = expression_to_modeb(statement->condition);
1625                 ir_node *const cond       = new_d_Cond(dbgi, condition);
1626                 true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1627                 false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1628         } else {
1629                 keep_alive(header_block);
1630                 true_proj  = new_Jmp();
1631                 false_proj = NULL;
1632         }
1633
1634         /* the false block */
1635         ir_node *const false_block = new_immBlock();
1636         if (false_proj != NULL) {
1637                 add_immBlock_pred(false_block, false_proj);
1638         }
1639
1640         /* the loop body */
1641         ir_node *const body_block = new_immBlock();
1642         add_immBlock_pred(body_block, true_proj);
1643         mature_immBlock(body_block);
1644
1645         ir_node *const old_continue_label = continue_label;
1646         ir_node *const old_break_label    = break_label;
1647         continue_label = step_block;
1648         break_label    = false_block;
1649
1650         statement_to_firm(statement->body);
1651
1652         assert(continue_label == step_block);
1653         assert(break_label    == false_block);
1654         continue_label = old_continue_label;
1655         break_label    = old_break_label;
1656
1657         if (get_cur_block() != NULL) {
1658                 ir_node *const jmp = new_Jmp();
1659                 add_immBlock_pred(step_block, jmp);
1660         }
1661
1662         mature_immBlock(step_block);
1663         mature_immBlock(header_block);
1664         mature_immBlock(false_block);
1665
1666         set_cur_block(false_block);
1667 }
1668
1669 static void create_declaration_entity(declaration_t *declaration,
1670                                       declaration_type_t declaration_type,
1671                                       ir_type *parent_type)
1672 {
1673         ident     *id     = new_id_from_str(declaration->symbol->string);
1674         ir_type   *irtype = get_ir_type(declaration->type);
1675         ir_entity *entity = new_entity(parent_type, id, irtype);
1676         set_entity_ld_ident(entity, id);
1677
1678         declaration->declaration_type = declaration_type;
1679         declaration->v.entity         = entity;
1680         set_entity_variability(entity, variability_uninitialized);
1681         /* TODO: visibility? */
1682 }
1683
1684 static void create_initializer(declaration_t *declaration)
1685 {
1686         initializer_t *initializer = declaration->init.initializer;
1687         if(initializer == NULL)
1688                 return;
1689
1690         if(initializer->type == INITIALIZER_VALUE) {
1691                 assert(initializer->designator == NULL);
1692                 assert(initializer->next == NULL);
1693                 ir_node *init_node = expression_to_firm(initializer->v.value);
1694
1695                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1696                         set_value(declaration->v.value_number, init_node);
1697                 } else {
1698                         ir_entity *entity = declaration->v.entity;
1699
1700                         set_entity_variability(entity, variability_initialized);
1701                         set_atomic_ent_value(entity, init_node);
1702                 }
1703         } else {
1704                 assert(initializer->type == INITIALIZER_LIST);
1705                 panic("list initializer not supported yet");
1706         }
1707 }
1708
1709 static void create_local_variable(declaration_t *declaration)
1710 {
1711         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
1712
1713         bool needs_entity = declaration->address_taken;
1714         type_t *type = skip_typeref(declaration->type);
1715
1716         if(type->type == TYPE_ARRAY
1717                         || type->type == TYPE_COMPOUND_STRUCT
1718                         || type->type == TYPE_COMPOUND_UNION) {
1719                 needs_entity = true;
1720         }
1721
1722         if(needs_entity) {
1723                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
1724                 create_declaration_entity(declaration,
1725                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
1726                                           frame_type);
1727         } else {
1728                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1729                 declaration->v.value_number   = next_value_number_function;
1730                 ++next_value_number_function;
1731         }
1732
1733         create_initializer(declaration);
1734 }
1735
1736 static void declaration_statement_to_firm(declaration_statement_t *statement)
1737 {
1738         declaration_t *declaration = statement->declarations_begin;
1739         declaration_t *end         = statement->declarations_end->next;
1740         for( ; declaration != end; declaration = declaration->next) {
1741                 type_t *type = declaration->type;
1742
1743                 switch(declaration->storage_class) {
1744                 case STORAGE_CLASS_TYPEDEF:
1745                         continue;
1746                 case STORAGE_CLASS_STATIC:
1747                         panic("static local vars not implemented yet");
1748                 case STORAGE_CLASS_ENUM_ENTRY:
1749                         panic("enum entry declaration in local block found");
1750                 case STORAGE_CLASS_EXTERN:
1751                         panic("extern declaration in local block found");
1752                 case STORAGE_CLASS_NONE:
1753                 case STORAGE_CLASS_AUTO:
1754                 case STORAGE_CLASS_REGISTER:
1755                         if(type->type == TYPE_FUNCTION) {
1756                                 panic("nested functions not supported yet");
1757                         } else {
1758                                 create_local_variable(declaration);
1759                         }
1760                         continue;
1761                 }
1762                 panic("invalid storage class found");
1763         }
1764 }
1765
1766 static void create_jump_statement(const statement_t *statement,
1767                                   ir_node *target_block)
1768 {
1769         if(get_cur_block() == NULL)
1770                 return;
1771
1772         dbg_info *dbgi = get_dbg_info(&statement->source_position);
1773         ir_node  *jump = new_d_Jmp(dbgi);
1774         add_immBlock_pred(target_block, jump);
1775
1776         set_cur_block(NULL);
1777 }
1778
1779 static void switch_statement_to_firm(const switch_statement_t *statement)
1780 {
1781         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1782
1783         ir_node *expression  = expression_to_firm(statement->expression);
1784         ir_node *cond        = new_d_Cond(dbgi, expression);
1785         ir_node *break_block = new_immBlock();
1786
1787         set_cur_block(NULL);
1788
1789         ir_node *const old_switch_cond       = current_switch_cond;
1790         ir_node *const old_break_label       = break_label;
1791         const bool     old_saw_default_label = saw_default_label;
1792         current_switch_cond                  = cond;
1793         break_label                          = break_block;
1794
1795         statement_to_firm(statement->body);
1796
1797         if(get_cur_block() != NULL) {
1798                 ir_node *jmp = new_Jmp();
1799                 add_immBlock_pred(break_block, jmp);
1800         }
1801
1802         if (!saw_default_label) {
1803                 set_cur_block(get_nodes_block(cond));
1804                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
1805                                                         MAGIC_DEFAULT_PN_NUMBER);
1806                 add_immBlock_pred(break_block, proj);
1807         }
1808
1809         assert(current_switch_cond == cond);
1810         assert(break_label         == break_block);
1811         current_switch_cond = old_switch_cond;
1812         break_label         = old_break_label;
1813         saw_default_label   = old_saw_default_label;
1814
1815         mature_immBlock(break_block);
1816         set_cur_block(break_block);
1817 }
1818
1819 static long fold_constant(const expression_t *expression)
1820 {
1821         ir_graph *old_current_ir_graph = current_ir_graph;
1822         current_ir_graph = get_const_code_irg();
1823
1824         ir_node *cnst = expression_to_firm(expression);
1825         if(!is_Const(cnst)) {
1826                 panic("couldn't fold constantl");
1827         }
1828         tarval *tv = get_Const_tarval(cnst);
1829         if(!tarval_is_long(tv)) {
1830                 panic("folded constant not an integer");
1831         }
1832
1833         long res = get_tarval_long(tv);
1834
1835         current_ir_graph = old_current_ir_graph;
1836         return res;
1837 }
1838
1839 static void case_label_to_firm(const case_label_statement_t *statement)
1840 {
1841         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1842
1843         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
1844
1845         /* let's create a node and hope firm constant folding creates a Const
1846          * node... */
1847         ir_node *proj;
1848         set_cur_block(get_nodes_block(current_switch_cond));
1849         if(statement->expression) {
1850                 long pn = fold_constant(statement->expression);
1851                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
1852                         /* oops someone detected our cheating... */
1853                         panic("magic default pn used");
1854                 }
1855                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
1856         } else {
1857                 saw_default_label = true;
1858                 proj = new_d_defaultProj(dbgi, current_switch_cond,
1859                                          MAGIC_DEFAULT_PN_NUMBER);
1860         }
1861
1862         ir_node *block = new_immBlock();
1863         if (fallthrough != NULL) {
1864                 add_immBlock_pred(block, fallthrough);
1865         }
1866         add_immBlock_pred(block, proj);
1867         mature_immBlock(block);
1868 }
1869
1870 static ir_node *get_label_block(declaration_t *label)
1871 {
1872         assert(label->namespace == NAMESPACE_LABEL);
1873
1874         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
1875                 return label->v.block;
1876         }
1877         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
1878
1879         ir_node *old_cur_block = get_cur_block();
1880         ir_node *block         = new_immBlock();
1881         set_cur_block(old_cur_block);
1882
1883         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
1884         label->v.block          = block;
1885
1886         ARR_APP1(imature_blocks, block);
1887
1888         return block;
1889 }
1890
1891 static void label_to_firm(const label_statement_t *statement)
1892 {
1893         ir_node *block = get_label_block(statement->label);
1894
1895         if(get_cur_block() != NULL) {
1896                 ir_node *jmp = new_Jmp();
1897                 add_immBlock_pred(block, jmp);
1898         }
1899
1900         set_cur_block(block);
1901         keep_alive(block);
1902
1903         statement_to_firm(statement->label_statement);
1904 }
1905
1906 static void goto_to_firm(const goto_statement_t *statement)
1907 {
1908         if(get_cur_block() == NULL)
1909                 return;
1910
1911         ir_node *block = get_label_block(statement->label);
1912         ir_node *jmp   = new_Jmp();
1913         add_immBlock_pred(block, jmp);
1914
1915         set_cur_block(NULL);
1916 }
1917
1918 static void statement_to_firm(statement_t *statement)
1919 {
1920         switch(statement->type) {
1921         case STATEMENT_COMPOUND:
1922                 compound_statement_to_firm((compound_statement_t*) statement);
1923                 return;
1924         case STATEMENT_RETURN:
1925                 return_statement_to_firm((return_statement_t*) statement);
1926                 return;
1927         case STATEMENT_EXPRESSION:
1928                 expression_statement_to_firm((expression_statement_t*) statement);
1929                 return;
1930         case STATEMENT_IF:
1931                 if_statement_to_firm((if_statement_t*) statement);
1932                 return;
1933         case STATEMENT_WHILE:
1934                 while_statement_to_firm((while_statement_t*) statement);
1935                 return;
1936         case STATEMENT_DO_WHILE:
1937                 do_while_statement_to_firm((do_while_statement_t*) statement);
1938                 return;
1939         case STATEMENT_DECLARATION:
1940                 declaration_statement_to_firm((declaration_statement_t*) statement);
1941                 return;
1942         case STATEMENT_BREAK:
1943                 create_jump_statement(statement, break_label);
1944                 return;
1945         case STATEMENT_CONTINUE:
1946                 create_jump_statement(statement, continue_label);
1947                 return;
1948         case STATEMENT_SWITCH:
1949                 switch_statement_to_firm((switch_statement_t*) statement);
1950                 return;
1951         case STATEMENT_CASE_LABEL:
1952                 case_label_to_firm((case_label_statement_t*) statement);
1953                 return;
1954         case STATEMENT_FOR:
1955                 for_statement_to_firm((for_statement_t*) statement);
1956                 return;
1957         case STATEMENT_LABEL:
1958                 label_to_firm((label_statement_t*) statement);
1959                 return;
1960         case STATEMENT_GOTO:
1961                 goto_to_firm((goto_statement_t*) statement);
1962                 return;
1963         default:
1964                 break;
1965         }
1966         panic("Statement not implemented\n");
1967 }
1968
1969 static int get_function_n_local_vars(declaration_t *declaration)
1970 {
1971         (void) declaration;
1972         /* TODO */
1973         return 30;
1974 }
1975
1976 static void initialize_function_parameters(declaration_t *declaration)
1977 {
1978         ir_graph *irg         = current_ir_graph;
1979         ir_node  *args        = get_irg_args(irg);
1980         ir_node  *start_block = get_irg_start_block(irg);
1981
1982         int            n         = 0;
1983         declaration_t *parameter = declaration->context.declarations;
1984         for( ; parameter != NULL; parameter = parameter->next) {
1985                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
1986                 type_t *type = parameter->type;
1987
1988                 bool needs_entity = parameter->address_taken;
1989                 if(type->type == TYPE_COMPOUND_STRUCT
1990                                 || type->type == TYPE_COMPOUND_UNION) {
1991                         needs_entity = true;
1992                 }
1993
1994                 if(needs_entity) {
1995                         panic("entities for function parameters not implemented yet");
1996                 }
1997
1998                 ir_mode *mode = get_ir_mode(parameter->type);
1999                 long     pn   = n;
2000                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2001                 ++n;
2002
2003                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2004                 parameter->v.value_number   = next_value_number_function;
2005                 ++next_value_number_function;
2006
2007                 set_value(parameter->v.value_number, proj);
2008         }
2009 }
2010
2011 static void create_function(declaration_t *declaration)
2012 {
2013         ir_entity *entity = get_function_entity(declaration);
2014
2015         if(declaration->init.statement == NULL)
2016                 return;
2017
2018         assert(imature_blocks == NULL);
2019         imature_blocks = NEW_ARR_F(ir_node*, 0);
2020
2021         int       n_local_vars = get_function_n_local_vars(declaration);
2022         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
2023         ir_node  *first_block  = get_cur_block();
2024
2025         next_value_number_function = 0;
2026         initialize_function_parameters(declaration);
2027
2028         statement_to_firm(declaration->init.statement);
2029
2030         ir_node *end_block = get_irg_end_block(irg);
2031
2032         /* do we have a return statement yet? */
2033         if(get_cur_block() != NULL) {
2034                 assert(declaration->type->type == TYPE_FUNCTION);
2035                 const function_type_t* const func_type
2036                         = (const function_type_t*) declaration->type;
2037                 ir_node *ret;
2038                 if (func_type->result_type == type_void) {
2039                         ret = new_Return(get_store(), 0, NULL);
2040                 } else {
2041                         ir_mode *const mode = get_ir_mode(func_type->result_type);
2042                         ir_node *      in[1];
2043                         // §5.1.2.2.3 main implicitly returns 0
2044                         if (strcmp(declaration->symbol->string, "main") == 0) {
2045                                 in[0] = new_Const(mode, get_mode_null(mode));
2046                         } else {
2047                                 in[0] = new_Unknown(mode);
2048                         }
2049                         ret = new_Return(get_store(), 1, in);
2050                 }
2051                 add_immBlock_pred(end_block, ret);
2052         }
2053
2054         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2055                 mature_immBlock(imature_blocks[i]);
2056         }
2057         DEL_ARR_F(imature_blocks);
2058         imature_blocks = NULL;
2059
2060         mature_immBlock(first_block);
2061         mature_immBlock(end_block);
2062
2063         irg_finalize_cons(irg);
2064
2065         /* finalize the frame type */
2066         ir_type *frame_type = get_irg_frame_type(irg);
2067         int      n          = get_compound_n_members(frame_type);
2068         int      align_all  = 4;
2069         int      offset     = 0;
2070         for(int i = 0; i < n; ++i) {
2071                 ir_entity *entity      = get_compound_member(frame_type, i);
2072                 ir_type   *entity_type = get_entity_type(entity);
2073
2074                 int align = get_type_alignment_bytes(entity_type);
2075                 if(align > align_all)
2076                         align_all = align;
2077                 int misalign = 0;
2078                 if(align > 0) {
2079                         misalign  = offset % align;
2080                         offset   += misalign;
2081                 }
2082
2083                 set_entity_offset(entity, offset);
2084                 offset += get_type_size_bytes(entity_type);
2085         }
2086         set_type_size_bytes(frame_type, offset);
2087         set_type_alignment_bytes(frame_type, align_all);
2088         set_type_state(frame_type, layout_fixed);
2089
2090         irg_vrfy(irg);
2091 }
2092
2093 static void create_global_variable(declaration_t *declaration)
2094 {
2095         ir_type   *global_type = get_glob_type();
2096         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
2097                                   global_type);
2098
2099         ir_entity *entity = declaration->v.entity;
2100         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
2101                 set_entity_visibility(entity, visibility_local);
2102         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
2103                 set_entity_visibility(entity, visibility_external_allocated);
2104         } else {
2105                 set_entity_visibility(entity, visibility_external_visible);
2106         }
2107         current_ir_graph = get_const_code_irg();
2108         create_initializer(declaration);
2109 }
2110
2111 static void context_to_firm(context_t *context)
2112 {
2113         declaration_t *declaration = context->declarations;
2114         for( ; declaration != NULL; declaration = declaration->next) {
2115                 if(declaration->namespace != NAMESPACE_NORMAL)
2116                         continue;
2117                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2118                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2119                         continue;
2120                 if(declaration->symbol == NULL)
2121                         continue;
2122
2123                 type_t *type = declaration->type;
2124                 if(type->type == TYPE_FUNCTION) {
2125                         create_function(declaration);
2126                 } else {
2127                         create_global_variable(declaration);
2128                 }
2129         }
2130 }
2131
2132 void translation_unit_to_firm(translation_unit_t *unit)
2133 {
2134         /* remove me later TODO FIXME */
2135         (void) get_type_size;
2136
2137         /* just to be sure */
2138         continue_label      = NULL;
2139         break_label         = NULL;
2140         current_switch_cond = NULL;
2141
2142         context_to_firm(& unit->context);
2143 }