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