nsz Git - cparser/blob - ast2firm.c

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