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 #include "parser.h"
  20
  21 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  22
  23 static ir_type *ir_type_const_char;
  24 static ir_type *ir_type_void;
  25 static ir_type *ir_type_int;
  26 static ir_type *ir_type_void_ptr;
  27
  28 static type_t *type_const_char;
  29 static type_t *type_void;
  30 static type_t *type_int;
  31
  32 static symbol_t *symbol_alloca;
  33
  34 static int       next_value_number_function;
  35 static ir_node  *continue_label;
  36 static ir_node  *break_label;
  37 static ir_node  *current_switch_cond;
  38 static bool      saw_default_label;
  39 static ir_node **imature_blocks;
  40
  41 static const declaration_t *current_function_decl;
  42 static ir_node             *current_function_name;
  43
  44 typedef enum declaration_type_t {
  45         DECLARATION_TYPE_UNKNOWN,
  46         DECLARATION_TYPE_FUNCTION,
  47         DECLARATION_TYPE_GLOBAL_VARIABLE,
  48         DECLARATION_TYPE_LOCAL_VARIABLE,
  49         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  50         DECLARATION_TYPE_COMPOUND_MEMBER,
  51         DECLARATION_TYPE_LABEL_BLOCK,
  52         DECLARATION_TYPE_ENUM_ENTRY
  53 } declaration_type_t;
  54
  55 static ir_type *get_ir_type(type_t *type);
  56
  57 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  58 {
  59         (void) pos;
  60 #if 0
  61         const declaration_t *declaration = & value_numbers[pos]->declaration;
  62
  63         print_warning_prefix(declaration->source_position);
  64         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  65                         declaration->symbol->string);
  66 #endif
  67         fprintf(stderr, "Some variable might be used uninitialized\n");
  68         return new_r_Unknown(irg, mode);
  69 }
  70
  71 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  72 {
  73         const source_position_t *pos = (const source_position_t*) dbg;
  74         if(pos == NULL)
  75                 return 0;
  76         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  77                                    pos->linenr);
  78 }
  79
  80 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  81 {
  82         const source_position_t *pos = (const source_position_t*) dbg;
  83         if(pos == NULL)
  84                 return NULL;
  85         if(line != NULL)
  86                 *line = pos->linenr;
  87         return pos->input_name;
  88 }
  89
  90 void init_ast2firm(void)
  91 {
  92         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  93         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
  94         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
  95
  96         ir_type_int        = get_ir_type(type_int);
  97         ir_type_const_char = get_ir_type(type_const_char);
  98         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  99                                                        type in firm */
 100         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
 101                                               ir_type_void, mode_P_data);
 102
 103         type_void->base.firm_type = ir_type_void;
 104
 105         symbol_alloca = symbol_table_insert("__builtin_alloca");
 106 }
 107
 108 void exit_ast2firm(void)
 109 {
 110 }
 111
 112 static unsigned unique_id = 0;
 113
 114 static ident *unique_ident(const char *tag)
 115 {
 116         char buf[256];
 117
 118         snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
 119         unique_id++;
 120         return new_id_from_str(buf);
 121 }
 122
 123 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 124 {
 125         switch(atomic_type->atype) {
 126         case ATOMIC_TYPE_SCHAR:
 127         case ATOMIC_TYPE_CHAR:
 128                 return mode_Bs;
 129         case ATOMIC_TYPE_UCHAR:
 130                 return mode_Bu;
 131         case ATOMIC_TYPE_SHORT:
 132                 return mode_Hs;
 133         case ATOMIC_TYPE_USHORT:
 134                 return mode_Hu;
 135         case ATOMIC_TYPE_LONG:
 136         case ATOMIC_TYPE_INT:
 137                 return mode_Is;
 138         case ATOMIC_TYPE_ULONG:
 139         case ATOMIC_TYPE_UINT:
 140                 return mode_Iu;
 141         case ATOMIC_TYPE_LONGLONG:
 142                 return mode_Ls;
 143         case ATOMIC_TYPE_ULONGLONG:
 144                 return mode_Lu;
 145         case ATOMIC_TYPE_FLOAT:
 146                 return mode_F;
 147         case ATOMIC_TYPE_DOUBLE:
 148                 return mode_D;
 149         case ATOMIC_TYPE_LONG_DOUBLE:
 150                 return mode_E;
 151         case ATOMIC_TYPE_BOOL:
 152                 return mode_b;
 153 #ifdef PROVIDE_COMPLEX
 154         case ATOMIC_TYPE_FLOAT_COMPLEX:
 155         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 156         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 157                 panic("complex lowering not implemented yet");
 158                 break;
 159         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 160         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 161         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 162                 panic("imaginary lowering not implemented yet");
 163                 break;
 164 #endif
 165         case ATOMIC_TYPE_VOID:
 166                 /* firm has no real void... */
 167                 return mode_Is;
 168         case ATOMIC_TYPE_INVALID:
 169                 break;
 170         }
 171         panic("Encountered unknown atomic type");
 172 }
 173
 174
 175 static unsigned get_type_size(type_t *type);
 176
 177 static unsigned get_atomic_type_size(const atomic_type_t *type)
 178 {
 179         switch(type->atype) {
 180         case ATOMIC_TYPE_CHAR:
 181         case ATOMIC_TYPE_SCHAR:
 182         case ATOMIC_TYPE_UCHAR:
 183                 return 1;
 184
 185         case ATOMIC_TYPE_SHORT:
 186         case ATOMIC_TYPE_USHORT:
 187                 return 2;
 188
 189         case ATOMIC_TYPE_BOOL:
 190         case ATOMIC_TYPE_INT:
 191         case ATOMIC_TYPE_UINT:
 192         case ATOMIC_TYPE_LONG:
 193         case ATOMIC_TYPE_ULONG:
 194         case ATOMIC_TYPE_FLOAT:
 195                 return 4;
 196
 197         case ATOMIC_TYPE_LONGLONG:
 198         case ATOMIC_TYPE_ULONGLONG:
 199         case ATOMIC_TYPE_DOUBLE:
 200                 return 8;
 201
 202         case ATOMIC_TYPE_LONG_DOUBLE:
 203                 return 12;
 204
 205         case ATOMIC_TYPE_VOID:
 206                 return 1;
 207
 208         case ATOMIC_TYPE_INVALID:
 209                 break;
 210         }
 211         panic("Trying to determine size of invalid atomic type");
 212 }
 213
 214 static unsigned get_compound_type_size(compound_type_t *type)
 215 {
 216         ir_type *irtype = get_ir_type((type_t*) type);
 217         return get_type_size_bytes(irtype);
 218 }
 219
 220 static unsigned get_array_type_size(array_type_t *type)
 221 {
 222         ir_type *irtype = get_ir_type((type_t*) type);
 223         return get_type_size_bytes(irtype);
 224 }
 225
 226 static unsigned get_type_size(type_t *type)
 227 {
 228         type = skip_typeref(type);
 229
 230         switch(type->type) {
 231         case TYPE_ATOMIC:
 232                 return get_atomic_type_size(&type->atomic);
 233         case TYPE_ENUM:
 234                 return get_mode_size_bytes(mode_Is);
 235         case TYPE_COMPOUND_UNION:
 236         case TYPE_COMPOUND_STRUCT:
 237                 return get_compound_type_size(&type->compound);
 238         case TYPE_FUNCTION:
 239                 /* just a pointer to the function */
 240                 return get_mode_size_bytes(mode_P_code);
 241         case TYPE_POINTER:
 242                 return get_mode_size_bytes(mode_P_data);
 243         case TYPE_ARRAY:
 244                 return get_array_type_size(&type->array);
 245         case TYPE_BUILTIN:
 246         case TYPE_TYPEDEF:
 247         case TYPE_TYPEOF:
 248         case TYPE_COUNT:
 249         case TYPE_INVALID:
 250                 break;
 251         }
 252         panic("Trying to determine size of invalid type");
 253 }
 254
 255 static unsigned count_parameters(const function_type_t *function_type)
 256 {
 257         unsigned count = 0;
 258
 259         function_parameter_t *parameter = function_type->parameters;
 260         for ( ; parameter != NULL; parameter = parameter->next) {
 261                 ++count;
 262         }
 263
 264         return count;
 265 }
 266
 267
 268
 269
 270 static long fold_constant(const expression_t *expression);
 271
 272 static ir_type *create_atomic_type(const atomic_type_t *type)
 273 {
 274         ir_mode *mode   = get_atomic_mode(type);
 275         ident   *id     = get_mode_ident(mode);
 276         ir_type *irtype = new_type_primitive(id, mode);
 277
 278         return irtype;
 279 }
 280
 281 static ir_type *create_method_type(const function_type_t *function_type)
 282 {
 283         type_t  *result_type  = function_type->result_type;
 284
 285         ident   *id           = unique_ident("functiontype");
 286         int      n_parameters = count_parameters(function_type);
 287         int      n_results    = result_type == type_void ? 0 : 1;
 288         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 289
 290         if(result_type != type_void) {
 291                 ir_type *restype = get_ir_type(result_type);
 292                 set_method_res_type(irtype, 0, restype);
 293         }
 294
 295         function_parameter_t *parameter = function_type->parameters;
 296         int                   n         = 0;
 297         for( ; parameter != NULL; parameter = parameter->next) {
 298                 ir_type *p_irtype = get_ir_type(parameter->type);
 299                 set_method_param_type(irtype, n, p_irtype);
 300                 ++n;
 301         }
 302
 303         if(function_type->variadic || function_type->unspecified_parameters) {
 304                 set_method_variadicity(irtype, variadicity_variadic);
 305         }
 306
 307         return irtype;
 308 }
 309
 310 static ir_type *create_pointer_type(pointer_type_t *type)
 311 {
 312         type_t  *points_to = type->points_to;
 313         ir_type *ir_points_to;
 314         /* Avoid endless recursion if the points_to type contains this poiner type
 315          * again (might be a struct). We therefore first create a void* pointer
 316          * and then set the real points_to type
 317          */
 318         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 319                                             ir_type_void, mode_P_data);
 320         type->type.firm_type  = ir_type;
 321
 322         ir_points_to = get_ir_type(points_to);
 323         set_pointer_points_to_type(ir_type, ir_points_to);
 324
 325         return ir_type;
 326 }
 327
 328 static ir_type *create_array_type(array_type_t *type)
 329 {
 330         type_t  *element_type    = type->element_type;
 331         ir_type *ir_element_type = get_ir_type(element_type);
 332
 333         ident   *id      = unique_ident("array");
 334         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 335
 336         if(type->size != NULL) {
 337                 int n_elements = fold_constant(type->size);
 338
 339                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 340
 341                 size_t elemsize = get_type_size_bytes(ir_element_type);
 342                 int align = get_type_alignment_bytes(ir_element_type);
 343                 if(elemsize % align > 0) {
 344                         elemsize += align - (elemsize % align);
 345                 }
 346                 set_type_size_bytes(ir_type, n_elements * elemsize);
 347                 set_type_alignment_bytes(ir_type, align);
 348                 set_type_state(ir_type, layout_fixed);
 349         }
 350
 351         return ir_type;
 352 }
 353
 354 #define INVALID_TYPE ((ir_type_ptr)-1)
 355
 356 static ir_type *create_struct_type(compound_type_t *type)
 357 {
 358         symbol_t *symbol = type->declaration->symbol;
 359         ident    *id;
 360         if(symbol != NULL) {
 361                 id = unique_ident(symbol->string);
 362         } else {
 363                 id = unique_ident("__anonymous_struct");
 364         }
 365         ir_type *ir_type = new_type_struct(id);
 366
 367         type->type.firm_type = ir_type;
 368
 369         int align_all = 1;
 370         int offset    = 0;
 371         declaration_t *entry = type->declaration->context.declarations;
 372         for( ; entry != NULL; entry = entry->next) {
 373                 if(entry->namespc != NAMESPACE_NORMAL)
 374                         continue;
 375
 376                 ident       *ident         = new_id_from_str(entry->symbol->string);
 377                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 378
 379                 int entry_size      = get_type_size_bytes(entry_ir_type);
 380                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 381                 int misalign        = offset % entry_alignment;
 382                 if (misalign != 0)
 383                         offset += entry_alignment - misalign;
 384
 385                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 386                 set_entity_offset(entity, offset);
 387                 add_struct_member(ir_type, entity);
 388                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 389                 entry->v.entity         = entity;
 390
 391                 offset += entry_size;
 392                 if(entry_alignment > align_all) {
 393                         if(entry_alignment % align_all != 0) {
 394                                 panic("Uneven alignments not supported yet");
 395                         }
 396                         align_all = entry_alignment;
 397                 }
 398         }
 399
 400         int misalign = offset % align_all;
 401         offset += misalign;
 402         set_type_alignment_bytes(ir_type, align_all);
 403         set_type_size_bytes(ir_type, offset);
 404         set_type_state(ir_type, layout_fixed);
 405
 406         return ir_type;
 407 }
 408
 409 static ir_type *create_union_type(compound_type_t *type)
 410 {
 411         declaration_t *declaration = type->declaration;
 412         symbol_t      *symbol      = declaration->symbol;
 413         ident         *id;
 414         if(symbol != NULL) {
 415                 id = unique_ident(symbol->string);
 416         } else {
 417                 id = unique_ident("__anonymous_union");
 418         }
 419         ir_type  *ir_type = new_type_union(id);
 420
 421         type->type.firm_type = ir_type;
 422
 423         int align_all = 1;
 424         int size      = 0;
 425         declaration_t *entry = declaration->context.declarations;
 426         for( ; entry != NULL; entry = entry->next) {
 427                 if(entry->namespc != NAMESPACE_NORMAL)
 428                         continue;
 429
 430                 ident       *ident         = new_id_from_str(entry->symbol->string);
 431                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 432
 433                 int entry_size      = get_type_size_bytes(entry_ir_type);
 434                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 435
 436                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 437                 add_union_member(ir_type, entity);
 438                 set_entity_offset(entity, 0);
 439                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 440                 entry->v.entity         = entity;
 441
 442                 if(entry_size > size) {
 443                         size = entry_size;
 444                 }
 445                 if(entry_alignment > align_all) {
 446                         if(entry_alignment % align_all != 0) {
 447                                 panic("Uneven alignments not supported yet");
 448                         }
 449                         align_all = entry_alignment;
 450                 }
 451         }
 452
 453         set_type_alignment_bytes(ir_type, align_all);
 454         set_type_size_bytes(ir_type, size);
 455         set_type_state(ir_type, layout_fixed);
 456
 457         return ir_type;
 458 }
 459
 460 static ir_node *expression_to_firm(const expression_t *expression);
 461 static inline ir_mode *get_ir_mode(type_t *type);
 462
 463 static ir_type *create_enum_type(enum_type_t *const type)
 464 {
 465         type->type.firm_type = ir_type_int;
 466
 467         ir_mode *const mode    = get_ir_mode((type_t*) type);
 468         tarval  *const one     = get_mode_one(mode);
 469         tarval  *      tv_next = get_tarval_null(mode);
 470
 471         declaration_t *declaration = type->declaration->next;
 472         for (; declaration != NULL; declaration = declaration->next) {
 473                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 474                         break;
 475
 476                 declaration->declaration_type = DECLARATION_TYPE_ENUM_ENTRY;
 477
 478                 expression_t *const init = declaration->init.enum_value;
 479                 if (init != NULL) {
 480                         ir_node *const cnst = expression_to_firm(init);
 481                         if (!is_Const(cnst)) {
 482                                 panic("couldn't fold constant");
 483                         }
 484                         tv_next = get_Const_tarval(cnst);
 485                 }
 486                 declaration->v.enum_val = tv_next;
 487                 tv_next = tarval_add(tv_next, one);
 488         }
 489
 490         return ir_type_int;
 491 }
 492
 493 static ir_type *get_ir_type(type_t *type)
 494 {
 495         assert(type != NULL);
 496
 497         type = skip_typeref(type);
 498
 499         if(type->base.firm_type != NULL) {
 500                 assert(type->base.firm_type != INVALID_TYPE);
 501                 return type->base.firm_type;
 502         }
 503
 504         ir_type *firm_type = NULL;
 505         switch(type->type) {
 506         case TYPE_ATOMIC:
 507                 firm_type = create_atomic_type(&type->atomic);
 508                 break;
 509         case TYPE_FUNCTION:
 510                 firm_type = create_method_type(&type->function);
 511                 break;
 512         case TYPE_POINTER:
 513                 firm_type = create_pointer_type(&type->pointer);
 514                 break;
 515         case TYPE_ARRAY:
 516                 firm_type = create_array_type(&type->array);
 517                 break;
 518         case TYPE_COMPOUND_STRUCT:
 519                 firm_type = create_struct_type(&type->compound);
 520                 break;
 521         case TYPE_COMPOUND_UNION:
 522                 firm_type = create_union_type(&type->compound);
 523                 break;
 524         case TYPE_ENUM:
 525                 firm_type = create_enum_type(&type->enumt);
 526                 break;
 527         case TYPE_BUILTIN:
 528         case TYPE_TYPEOF:
 529         case TYPE_TYPEDEF:
 530         case TYPE_COUNT:
 531         case TYPE_INVALID:
 532                 break;
 533         }
 534         if(firm_type == NULL)
 535                 panic("unknown type found");
 536
 537         type->base.firm_type = firm_type;
 538         return firm_type;
 539 }
 540
 541 static inline ir_mode *get_ir_mode(type_t *type)
 542 {
 543         ir_type *irtype = get_ir_type(type);
 544
 545         /* firm doesn't report a mode for arrays somehow... */
 546         if(is_Array_type(irtype)) {
 547                 return mode_P;
 548         }
 549
 550         ir_mode *mode = get_type_mode(irtype);
 551         assert(mode != NULL);
 552         return mode;
 553 }
 554
 555 static ir_entity* get_function_entity(declaration_t *declaration)
 556 {
 557         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 558                 return declaration->v.entity;
 559         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 560
 561         symbol_t *symbol = declaration->symbol;
 562         ident    *id     = new_id_from_str(symbol->string);
 563
 564         ir_type  *global_type    = get_glob_type();
 565         ir_type  *ir_type_method = get_ir_type(declaration->type);
 566         assert(is_Method_type(ir_type_method));
 567
 568         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 569         set_entity_ld_ident(entity, id);
 570         if(declaration->storage_class == STORAGE_CLASS_STATIC
 571                         || declaration->is_inline) {
 572                 set_entity_visibility(entity, visibility_local);
 573         } else if(declaration->init.statement != NULL) {
 574                 set_entity_visibility(entity, visibility_external_visible);
 575         } else {
 576                 set_entity_visibility(entity, visibility_external_allocated);
 577         }
 578
 579         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 580         declaration->v.entity         = entity;
 581
 582         return entity;
 583 }
 584
 585 static dbg_info *get_dbg_info(const source_position_t *pos)
 586 {
 587         return (dbg_info*) pos;
 588 }
 589
 590 static ir_node *const_to_firm(const const_expression_t *cnst)
 591 {
 592         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 593         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 594
 595         char    buf[128];
 596         tarval *tv;
 597         size_t  len;
 598         if(mode_is_float(mode)) {
 599                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 600         } else {
 601                 if(mode_is_signed(mode)) {
 602                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
 603                 } else {
 604                         len = snprintf(buf, sizeof(buf), "%llu", cnst->v.int_value);
 605                 }
 606                 tv = new_tarval_from_str(buf, len, mode);
 607         }
 608
 609         return new_d_Const(dbgi, mode, tv);
 610 }
 611
 612 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 613 {
 614         assert(entity != NULL);
 615         union symconst_symbol sym;
 616         sym.entity_p = entity;
 617         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 618 }
 619
 620 static ir_node *string_to_firm(const source_position_t *const src_pos,
 621                                const char *const id_prefix,
 622                                const char *const string)
 623 {
 624         ir_type *const global_type = get_glob_type();
 625         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 626                                                     ir_type_const_char);
 627
 628         ident     *const id     = unique_ident(id_prefix);
 629         ir_entity *const entity = new_entity(global_type, id, type);
 630         set_entity_ld_ident(entity, id);
 631         set_entity_variability(entity, variability_constant);
 632
 633         ir_type *const elem_type = ir_type_const_char;
 634         ir_mode *const mode      = get_type_mode(elem_type);
 635
 636         const size_t slen = strlen(string) + 1;
 637
 638         set_array_lower_bound_int(type, 0, 0);
 639         set_array_upper_bound_int(type, 0, slen);
 640         set_type_size_bytes(type, slen);
 641         set_type_state(type, layout_fixed);
 642
 643         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 644         for(size_t i = 0; i < slen; ++i) {
 645                 tvs[i] = new_tarval_from_long(string[i], mode);
 646         }
 647
 648         set_array_entity_values(entity, tvs, slen);
 649         free(tvs);
 650
 651         dbg_info *const dbgi = get_dbg_info(src_pos);
 652
 653         return create_symconst(dbgi, entity);
 654 }
 655
 656 static ir_node *string_literal_to_firm(
 657                 const string_literal_expression_t* literal)
 658 {
 659         return string_to_firm(&literal->expression.source_position, "Lstr",
 660                               literal->value);
 661 }
 662
 663 static ir_node *deref_address(ir_type *const irtype, ir_node *const addr,
 664                               dbg_info *const dbgi)
 665 {
 666         if(is_compound_type(irtype) || is_Array_type(irtype)) {
 667                 return addr;
 668         }
 669
 670         ir_mode *const mode     = get_type_mode(irtype);
 671         ir_node *const memory   = get_store();
 672         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
 673         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 674         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
 675         set_store(load_mem);
 676         return load_res;
 677 }
 678
 679 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 680 {
 681         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 682         declaration_t *declaration = ref->declaration;
 683         type_t        *type        = skip_typeref(declaration->type);
 684
 685         switch((declaration_type_t) declaration->declaration_type) {
 686         case DECLARATION_TYPE_UNKNOWN:
 687                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
 688                         break;
 689                 }
 690                 get_ir_type(type);
 691                 /* FALLTHROUGH */
 692
 693         case DECLARATION_TYPE_ENUM_ENTRY: {
 694                 ir_mode *const mode = get_ir_mode(type);
 695                 return new_Const(mode, declaration->v.enum_val);
 696         }
 697
 698         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 699                 ir_mode *mode = get_ir_mode(type);
 700                 return get_value(declaration->v.value_number, mode);
 701         }
 702         case DECLARATION_TYPE_FUNCTION: {
 703                 return create_symconst(dbgi, declaration->v.entity);
 704         }
 705         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 706                 ir_entity *entity   = declaration->v.entity;
 707                 ir_node   *symconst = create_symconst(dbgi, entity);
 708                 ir_type   *irtype   = get_entity_type(entity);
 709                 return deref_address(irtype, symconst, dbgi);
 710         }
 711         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 712                 ir_entity *entity = declaration->v.entity;
 713                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 714                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 715                 ir_type   *irtype = get_entity_type(entity);
 716                 return deref_address(irtype, sel, dbgi);
 717         }
 718
 719         case DECLARATION_TYPE_COMPOUND_MEMBER:
 720         case DECLARATION_TYPE_LABEL_BLOCK:
 721                 panic("not implemented reference type");
 722         }
 723
 724         panic("reference to declaration with unknown type found");
 725 }
 726
 727 static ir_node *reference_addr(const reference_expression_t *ref)
 728 {
 729         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 730         declaration_t *declaration = ref->declaration;
 731
 732         switch((declaration_type_t) declaration->declaration_type) {
 733         case DECLARATION_TYPE_UNKNOWN:
 734                 break;
 735         case DECLARATION_TYPE_LOCAL_VARIABLE:
 736                 panic("local variable without entity has no address");
 737         case DECLARATION_TYPE_FUNCTION: {
 738                 return create_symconst(dbgi, declaration->v.entity);
 739         }
 740         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 741                 ir_entity *entity   = declaration->v.entity;
 742                 ir_node   *symconst = create_symconst(dbgi, entity);
 743                 return symconst;
 744         }
 745         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 746                 ir_entity *entity = declaration->v.entity;
 747                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 748                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 749
 750                 return sel;
 751         }
 752
 753         case DECLARATION_TYPE_ENUM_ENTRY:
 754                 panic("trying to reference enum entry");
 755
 756         case DECLARATION_TYPE_COMPOUND_MEMBER:
 757         case DECLARATION_TYPE_LABEL_BLOCK:
 758                 panic("not implemented reference type");
 759         }
 760
 761         panic("reference to declaration with unknown type found");
 762 }
 763
 764 static ir_node *process_builtin_call(const call_expression_t *call)
 765 {
 766         dbg_info *dbgi = get_dbg_info(&call->expression.source_position);
 767
 768         assert(call->function->type == EXPR_BUILTIN_SYMBOL);
 769         builtin_symbol_expression_t *builtin
 770                 = (builtin_symbol_expression_t*) call->function;
 771         symbol_t *symbol = builtin->symbol;
 772
 773         if(symbol == symbol_alloca) {
 774                 if(call->arguments == NULL || call->arguments->next != NULL) {
 775                         panic("invalid number of parameters on __builtin_alloca");
 776                 }
 777                 expression_t *argument = call->arguments->expression;
 778                 ir_node      *size     = expression_to_firm(argument);
 779
 780                 ir_node *store  = get_store();
 781                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
 782                                               stack_alloc);
 783                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
 784                 set_store(proj_m);
 785                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
 786
 787                 return res;
 788         } else {
 789                 panic("Unsupported builtin found\n");
 790         }
 791 }
 792
 793 static ir_node *call_expression_to_firm(const call_expression_t *call)
 794 {
 795         assert(get_cur_block() != NULL);
 796
 797         expression_t  *function = call->function;
 798         if(function->type == EXPR_BUILTIN_SYMBOL) {
 799                 return process_builtin_call(call);
 800         }
 801         ir_node       *callee   = expression_to_firm(function);
 802
 803         type_t *type = function->base.datatype;
 804         assert(type->type == TYPE_POINTER);
 805         pointer_type_t *const ptr_type = &type->pointer;
 806         assert(ptr_type->points_to->type == TYPE_FUNCTION);
 807         function_type_t *function_type = &ptr_type->points_to->function;
 808
 809         int              n_parameters = 0;
 810         call_argument_t *argument     = call->arguments;
 811         for( ; argument != NULL; argument = argument->next) {
 812                 ++n_parameters;
 813         }
 814
 815         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 816         ir_type *new_method_type = NULL;
 817         if(function_type->variadic || function_type->unspecified_parameters) {
 818                 /* we need to construct a new method type matching the call
 819                  * arguments... */
 820                 int n_res       = get_method_n_ress(ir_method_type);
 821                 new_method_type = new_type_method(unique_ident("calltype"),
 822                                                   n_parameters, n_res);
 823                 set_method_calling_convention(new_method_type,
 824                                get_method_calling_convention(ir_method_type));
 825                 set_method_additional_properties(new_method_type,
 826                                get_method_additional_properties(ir_method_type));
 827
 828                 for(int i = 0; i < n_res; ++i) {
 829                         set_method_res_type(new_method_type, i,
 830                                             get_method_res_type(ir_method_type, i));
 831                 }
 832         }
 833         ir_node *in[n_parameters];
 834
 835         argument = call->arguments;
 836         int n = 0;
 837         for( ; argument != NULL; argument = argument->next) {
 838                 expression_t *expression = argument->expression;
 839                 ir_node      *arg_node   = expression_to_firm(expression);
 840
 841                 in[n] = arg_node;
 842                 if(new_method_type != NULL) {
 843                         ir_type *irtype = get_ir_type(expression->base.datatype);
 844                         set_method_param_type(new_method_type, n, irtype);
 845                 }
 846
 847                 n++;
 848         }
 849         assert(n == n_parameters);
 850
 851         if(new_method_type != NULL)
 852                 ir_method_type = new_method_type;
 853
 854         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 855         ir_node  *store = get_store();
 856         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 857                                      ir_method_type);
 858         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 859         set_store(mem);
 860
 861         type_t  *result_type = function_type->result_type;
 862         ir_node *result      = NULL;
 863         if(result_type != type_void) {
 864                 ir_mode *mode    = get_ir_mode(result_type);
 865                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 866                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 867         }
 868
 869         return result;
 870 }
 871
 872 static void statement_to_firm(statement_t *statement);
 873 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
 874
 875 static ir_node *expression_to_addr(const expression_t *expression);
 876 static void create_condition_evaluation(const expression_t *expression,
 877                                         ir_node *true_block,
 878                                         ir_node *false_block);
 879
 880 static void set_value_for_expression(const expression_t *expression,
 881                                      ir_node *value)
 882 {
 883         if(expression->type == EXPR_REFERENCE) {
 884                 reference_expression_t *ref = (reference_expression_t*) expression;
 885
 886                 declaration_t *declaration = ref->declaration;
 887                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 888                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 889                         set_value(declaration->v.value_number, value);
 890                         return;
 891                 }
 892         }
 893
 894         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
 895         ir_node  *addr      = expression_to_addr(expression);
 896         assert(get_irn_mode(value) == get_ir_mode(expression->base.datatype));
 897         ir_node  *memory    = get_store();
 898         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 899         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 900         set_store(store_mem);
 901 }
 902
 903 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 904 {
 905         ir_mode *value_mode = get_irn_mode(value);
 906
 907         if (value_mode == dest_mode || is_Bad(value))
 908                 return value;
 909
 910         if(dest_mode == mode_b) {
 911                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 912                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 913                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 914                 return proj;
 915         }
 916
 917         return new_d_Conv(dbgi, value, dest_mode);
 918 }
 919
 920 static ir_node *create_incdec(const unary_expression_t *expression)
 921 {
 922         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
 923         type_t       *type  = expression->expression.datatype;
 924         ir_mode      *mode  = get_ir_mode(type);
 925         expression_t *value = expression->value;
 926
 927         ir_node *value_node = expression_to_firm(value);
 928
 929         ir_node *offset;
 930         if(type->type == TYPE_POINTER) {
 931                 pointer_type_t *pointer_type = &type->pointer;
 932                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
 933                 offset = new_Const_long(mode_Is, elem_size);
 934         } else {
 935                 assert(is_type_arithmetic(type));
 936                 offset = new_Const(mode, get_mode_one(mode));
 937         }
 938
 939         switch(expression->type) {
 940         case UNEXPR_POSTFIX_INCREMENT: {
 941                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 942                 set_value_for_expression(value, new_value);
 943                 return value_node;
 944         }
 945         case UNEXPR_POSTFIX_DECREMENT: {
 946                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 947                 set_value_for_expression(value, new_value);
 948                 return value_node;
 949         }
 950         case UNEXPR_PREFIX_INCREMENT: {
 951                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 952                 set_value_for_expression(value, new_value);
 953                 return new_value;
 954         }
 955         case UNEXPR_PREFIX_DECREMENT: {
 956                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 957                 set_value_for_expression(value, new_value);
 958                 return new_value;
 959         }
 960         default:
 961                 panic("no incdec expr in create_incdec");
 962                 return NULL;
 963         }
 964 }
 965
 966 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 967 {
 968         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 969         type_t   *type = skip_typeref(expression->expression.datatype);
 970
 971         if(expression->type == UNEXPR_TAKE_ADDRESS)
 972                 return expression_to_addr(expression->value);
 973
 974         const expression_t *value      = expression->value;
 975         ir_node            *value_node = expression_to_firm(value);
 976
 977         switch(expression->type) {
 978         case UNEXPR_NEGATE:
 979                 return new_d_Minus(dbgi, value_node, get_ir_mode(type));
 980         case UNEXPR_PLUS:
 981                 return value_node;
 982         case UNEXPR_BITWISE_NEGATE:
 983                 return new_d_Not(dbgi, value_node, get_ir_mode(type));
 984         case UNEXPR_NOT: {
 985                 if(get_irn_mode(value_node) != mode_b) {
 986                         value_node = create_conv(dbgi, value_node, mode_b);
 987                 }
 988                 value_node = new_d_Not(dbgi, value_node, mode_b);
 989                 ir_mode *const mode = get_ir_mode(type);
 990                 if(mode != mode_b) {
 991                         value_node = create_conv(dbgi, value_node, mode);
 992                 }
 993                 return value_node;
 994         }
 995         case UNEXPR_DEREFERENCE: {
 996                 ir_type *irtype = get_ir_type(type);
 997                 return deref_address(irtype, value_node, dbgi);
 998         }
 999         case UNEXPR_POSTFIX_INCREMENT:
1000         case UNEXPR_POSTFIX_DECREMENT:
1001         case UNEXPR_PREFIX_INCREMENT:
1002         case UNEXPR_PREFIX_DECREMENT:
1003                 return create_incdec(expression);
1004         case UNEXPR_CAST:
1005                 return create_conv(dbgi, value_node, get_ir_mode(type));
1006
1007         case UNEXPR_TAKE_ADDRESS:
1008         case UNEXPR_INVALID:
1009                 break;
1010         }
1011         panic("invalid UNEXPR type found");
1012 }
1013
1014 static long get_pnc(binary_expression_type_t type)
1015 {
1016         switch(type) {
1017         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
1018         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
1019         case BINEXPR_LESS:         return pn_Cmp_Lt;
1020         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
1021         case BINEXPR_GREATER:      return pn_Cmp_Gt;
1022         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
1023         default:
1024                 break;
1025         }
1026         panic("trying to get pn_Cmp from non-comparison binexpr type");
1027 }
1028
1029 static ir_node *create_lazy_op(const binary_expression_t *expression)
1030 {
1031         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1032         type_t   *type = expression->expression.datatype;
1033         ir_mode  *mode = get_ir_mode(type);
1034
1035         ir_node *cur_block = get_cur_block();
1036
1037         ir_node *one_block = new_immBlock();
1038         ir_node *one       = new_Const(mode, get_mode_one(mode));
1039         ir_node *jmp_one   = new_d_Jmp(dbgi);
1040
1041         ir_node *zero_block = new_immBlock();
1042         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1043         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1044
1045         set_cur_block(cur_block);
1046         create_condition_evaluation((const expression_t*) expression,
1047                                     one_block, zero_block);
1048         mature_immBlock(one_block);
1049         mature_immBlock(zero_block);
1050
1051         ir_node *common_block = new_immBlock();
1052         add_immBlock_pred(common_block, jmp_one);
1053         add_immBlock_pred(common_block, jmp_zero);
1054         mature_immBlock(common_block);
1055
1056         ir_node *in[2] = { one, zero };
1057         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1058
1059         return val;
1060 }
1061
1062 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1063                                             ir_node *right, ir_mode *mode);
1064
1065 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1066                                         create_arithmetic_func func)
1067 {
1068         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1069         ir_node  *left  = expression_to_firm(expression->left);
1070         ir_node  *right = expression_to_firm(expression->right);
1071         type_t   *type  = expression->right->base.datatype;
1072         /* be careful with the modes, because in arithmetic assign nodes only
1073          * the right operand has the mode of the arithmetic already */
1074         ir_mode  *mode  = get_ir_mode(type);
1075         left            = create_conv(dbgi, left, mode);
1076         ir_node  *res   = func(dbgi, left, right, mode);
1077
1078         return res;
1079 }
1080
1081 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1082                                    ir_node  *      integer,
1083                                    type_t   *const type,
1084                                    dbg_info *const dbgi,
1085                                    const create_arithmetic_func func)
1086 {
1087         pointer_type_t *const pointer_type = (pointer_type_t*)type;
1088         type_t         *const points_to    = pointer_type->points_to;
1089         const unsigned        elem_size    = get_type_size(points_to);
1090
1091         assert(elem_size >= 1);
1092         if (elem_size > 1) {
1093                 integer             = create_conv(dbgi, integer, mode_Is);
1094                 ir_node *const cnst = new_Const_long(mode_Is, (long)elem_size);
1095                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
1096                 integer = mul;
1097         }
1098
1099         ir_mode *const mode = get_ir_mode(type);
1100         return func(dbgi, pointer, integer, mode);
1101 }
1102
1103 static ir_node *create_arithmetic_assign_binop(
1104                 const binary_expression_t *expression, create_arithmetic_func func)
1105 {
1106         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1107         type_t   *const type = expression->expression.datatype;
1108         ir_node  *value;
1109
1110         if (type->type == TYPE_POINTER) {
1111                 ir_node        *const pointer = expression_to_firm(expression->left);
1112                 ir_node        *      integer = expression_to_firm(expression->right);
1113                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1114         } else {
1115                 value = create_arithmetic_binop(expression, func);
1116         }
1117
1118         ir_mode  *const mode = get_ir_mode(type);
1119         value = create_conv(dbgi, value, mode);
1120         set_value_for_expression(expression->left, value);
1121
1122         return value;
1123 }
1124
1125 static ir_node *create_add(const binary_expression_t *expression)
1126 {
1127         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1128         ir_node  *left  = expression_to_firm(expression->left);
1129         ir_node  *right = expression_to_firm(expression->right);
1130         type_t   *type  = expression->expression.datatype;
1131
1132         expression_t *expr_left  = expression->left;
1133         expression_t *expr_right = expression->right;
1134         type_t       *type_left  = skip_typeref(expr_left->base.datatype);
1135         type_t       *type_right = skip_typeref(expr_right->base.datatype);
1136
1137         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1138                 ir_mode *const mode = get_ir_mode(type);
1139                 return new_d_Add(dbgi, left, right, mode);
1140         }
1141
1142         if (type_left->type == TYPE_POINTER || type_left->type == TYPE_ARRAY) {
1143                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1144         } else {
1145                 assert(type_right->type == TYPE_POINTER || type_right->type == TYPE_ARRAY);
1146                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1147         }
1148 }
1149
1150 static ir_node *create_sub(const binary_expression_t *expression)
1151 {
1152         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1153         expression_t *const expr_left  = expression->left;
1154         expression_t *const expr_right = expression->right;
1155         ir_node      *const left       = expression_to_firm(expr_left);
1156         ir_node      *const right      = expression_to_firm(expr_right);
1157         type_t       *const type       = expression->expression.datatype;
1158         type_t       *const type_left  = skip_typeref(expr_left->base.datatype);
1159         type_t       *const type_right = skip_typeref(expr_right->base.datatype);
1160
1161         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1162                 ir_mode *const mode = get_ir_mode(type);
1163                 return new_d_Sub(dbgi, left, right, mode);
1164         } else if (type_left->type == TYPE_POINTER
1165                         && type_right->type == TYPE_POINTER) {
1166                 const pointer_type_t *const ptr_type = &type_left->pointer;
1167                 const unsigned elem_size             = get_type_size(ptr_type->points_to);
1168                 ir_mode *const mode   = get_ir_mode(type);
1169                 ir_node *const sub    = new_d_Sub(dbgi, left, right, mode);
1170                 ir_node *const cnst   = new_Const_long(mode_Is, (long)elem_size);
1171                 ir_node *const no_mem = new_NoMem();
1172                 ir_node *const div    = new_d_Div(dbgi, no_mem, sub, cnst, mode,
1173                                                   op_pin_state_floats);
1174                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
1175         }
1176
1177         assert(type_left->type == TYPE_POINTER);
1178         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1179 }
1180
1181 static ir_node *create_shift(const binary_expression_t *expression)
1182 {
1183         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1184         ir_node  *left  = expression_to_firm(expression->left);
1185         ir_node  *right = expression_to_firm(expression->right);
1186         type_t   *type  = expression->expression.datatype;
1187         ir_mode  *mode  = get_ir_mode(type);
1188
1189         /* firm always wants the shift count to be unsigned */
1190         right = create_conv(dbgi, right, mode_Iu);
1191
1192         ir_node *res;
1193
1194         switch(expression->type) {
1195         case BINEXPR_SHIFTLEFT_ASSIGN:
1196         case BINEXPR_SHIFTLEFT:
1197                 res = new_d_Shl(dbgi, left, right, mode);
1198                 break;
1199         case BINEXPR_SHIFTRIGHT_ASSIGN:
1200         case BINEXPR_SHIFTRIGHT: {
1201                  expression_t *expr_left = expression->left;
1202                  type_t       *type_left = skip_typeref(expr_left->base.datatype);
1203
1204                  if(is_type_signed(type_left)) {
1205                         res = new_d_Shrs(dbgi, left, right, mode);
1206                  } else {
1207                          res = new_d_Shr(dbgi, left, right, mode);
1208                  }
1209                  break;
1210         }
1211         default:
1212                 panic("create shift op called for non-shift op");
1213         }
1214
1215         return res;
1216 }
1217
1218
1219 static ir_node *create_divmod(const binary_expression_t *expression)
1220 {
1221         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1222         ir_node  *left  = expression_to_firm(expression->left);
1223         ir_node  *right = expression_to_firm(expression->right);
1224         ir_node  *pin   = new_Pin(new_NoMem());
1225         /* be careful with the modes, because in arithmetic assign nodes only
1226          * the right operand has the mode of the arithmetic already */
1227         type_t   *type  = expression->right->base.datatype;
1228         ir_mode  *mode  = get_ir_mode(type);
1229         left            = create_conv(dbgi, left, mode);
1230         ir_node  *op;
1231         ir_node  *res;
1232
1233         switch (expression->type)  {
1234                 case BINEXPR_DIV:
1235                 case BINEXPR_DIV_ASSIGN:
1236                         if(mode_is_float(mode)) {
1237                                 op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1238                                 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1239                         } else {
1240                                 op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1241                                 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1242                         }
1243                         break;
1244
1245                 case BINEXPR_MOD:
1246                 case BINEXPR_MOD_ASSIGN:
1247                         assert(!mode_is_float(mode));
1248                         op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1249                         res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1250                         break;
1251
1252                 default: panic("unexpected binary expression type in create_divmod()");
1253         }
1254
1255         return res;
1256 }
1257
1258 static ir_node *create_arithmetic_assign_divmod(
1259                 const binary_expression_t *expression)
1260 {
1261         ir_node  *      value = create_divmod(expression);
1262         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1263         type_t   *const type  = expression->expression.datatype;
1264         ir_mode  *const mode  = get_ir_mode(type);
1265
1266         assert(type->type != TYPE_POINTER);
1267
1268         value = create_conv(dbgi, value, mode);
1269         set_value_for_expression(expression->left, value);
1270
1271         return value;
1272 }
1273
1274 static ir_node *create_arithmetic_assign_shift(
1275                 const binary_expression_t *expression)
1276 {
1277         ir_node  *      value = create_shift(expression);
1278         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1279         type_t   *const type  = expression->expression.datatype;
1280         ir_mode  *const mode  = get_ir_mode(type);
1281
1282         value = create_conv(dbgi, value, mode);
1283         set_value_for_expression(expression->left, value);
1284
1285         return value;
1286 }
1287
1288 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1289 {
1290         binary_expression_type_t type = expression->type;
1291         switch(type) {
1292         case BINEXPR_EQUAL:
1293         case BINEXPR_NOTEQUAL:
1294         case BINEXPR_LESS:
1295         case BINEXPR_LESSEQUAL:
1296         case BINEXPR_GREATER:
1297         case BINEXPR_GREATEREQUAL: {
1298                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1299                 ir_node *left  = expression_to_firm(expression->left);
1300                 ir_node *right = expression_to_firm(expression->right);
1301                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1302                 long     pnc   = get_pnc(type);
1303                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1304                 return proj;
1305         }
1306         case BINEXPR_ASSIGN: {
1307                 ir_node *right = expression_to_firm(expression->right);
1308                 set_value_for_expression(expression->left, right);
1309                 return right;
1310         }
1311         case BINEXPR_ADD:
1312                 return create_add(expression);
1313         case BINEXPR_SUB:
1314                 return create_sub(expression);
1315         case BINEXPR_MUL:
1316                 return create_arithmetic_binop(expression, new_d_Mul);
1317         case BINEXPR_BITWISE_AND:
1318                 return create_arithmetic_binop(expression, new_d_And);
1319         case BINEXPR_BITWISE_OR:
1320                 return create_arithmetic_binop(expression, new_d_Or);
1321         case BINEXPR_BITWISE_XOR:
1322                 return create_arithmetic_binop(expression, new_d_Eor);
1323         case BINEXPR_SHIFTLEFT:
1324         case BINEXPR_SHIFTRIGHT:
1325                 return create_shift(expression);
1326         case BINEXPR_DIV:
1327         case BINEXPR_MOD:
1328                 return create_divmod(expression);
1329         case BINEXPR_LOGICAL_AND:
1330         case BINEXPR_LOGICAL_OR:
1331                 return create_lazy_op(expression);
1332         case BINEXPR_COMMA:
1333                 expression_to_firm(expression->left);
1334                 return expression_to_firm(expression->right);
1335         case BINEXPR_ADD_ASSIGN:
1336                 return create_arithmetic_assign_binop(expression, new_d_Add);
1337         case BINEXPR_SUB_ASSIGN:
1338                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1339         case BINEXPR_MUL_ASSIGN:
1340                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1341         case BINEXPR_DIV_ASSIGN:
1342                 return create_arithmetic_assign_divmod(expression);
1343         case BINEXPR_BITWISE_AND_ASSIGN:
1344                 return create_arithmetic_assign_binop(expression, new_d_And);
1345         case BINEXPR_BITWISE_OR_ASSIGN:
1346                 return create_arithmetic_assign_binop(expression, new_d_Or);
1347         case BINEXPR_BITWISE_XOR_ASSIGN:
1348                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1349         case BINEXPR_SHIFTLEFT_ASSIGN:
1350         case BINEXPR_SHIFTRIGHT_ASSIGN:
1351                 return create_arithmetic_assign_shift(expression);
1352         default:
1353                 panic("TODO binexpr type");
1354         }
1355 }
1356
1357 static ir_node *array_access_addr(const array_access_expression_t *expression)
1358 {
1359         dbg_info *dbgi      = get_dbg_info(&expression->expression.source_position);
1360         ir_node  *base_addr = expression_to_firm(expression->array_ref);
1361         ir_node  *offset    = expression_to_firm(expression->index);
1362         offset              = create_conv(dbgi, offset, mode_Iu);
1363
1364         type_t *ref_type = skip_typeref(expression->array_ref->base.datatype);
1365         assert(is_type_pointer(ref_type));
1366         pointer_type_t *pointer_type = (pointer_type_t*) ref_type;
1367
1368         unsigned elem_size       = get_type_size(pointer_type->points_to);
1369         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1370         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1371                                              mode_Iu);
1372         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1373
1374         return result;
1375 }
1376
1377 static ir_node *array_access_to_firm(
1378                 const array_access_expression_t *expression)
1379 {
1380         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1381         ir_node  *addr   = array_access_addr(expression);
1382         type_t   *type   = revert_automatic_type_conversion(
1383                         (const expression_t*) expression);
1384         type             = skip_typeref(type);
1385         ir_type  *irtype = get_ir_type(type);
1386
1387         return deref_address(irtype, addr, dbgi);
1388 }
1389
1390 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1391 {
1392         type_t *type = expression->type;
1393         if(type == NULL) {
1394                 type = expression->size_expression->base.datatype;
1395                 assert(type != NULL);
1396         }
1397
1398         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1399         unsigned  size      = get_type_size(type);
1400         ir_node  *size_node = new_Const_long(mode, size);
1401
1402         return size_node;
1403 }
1404
1405 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1406 {
1407         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1408
1409         ir_node *cur_block   = get_cur_block();
1410
1411         /* create the true block */
1412         ir_node *true_block  = new_immBlock();
1413
1414         ir_node *true_val = expression_to_firm(expression->true_expression);
1415         ir_node *true_jmp = new_Jmp();
1416
1417         /* create the false block */
1418         ir_node *false_block = new_immBlock();
1419
1420         ir_node *false_val = expression_to_firm(expression->false_expression);
1421         ir_node *false_jmp = new_Jmp();
1422
1423         /* create the condition evaluation */
1424         set_cur_block(cur_block);
1425         create_condition_evaluation(expression->condition, true_block, false_block);
1426         mature_immBlock(true_block);
1427         mature_immBlock(false_block);
1428
1429         /* create the common block */
1430         ir_node *common_block = new_immBlock();
1431         add_immBlock_pred(common_block, true_jmp);
1432         add_immBlock_pred(common_block, false_jmp);
1433         mature_immBlock(common_block);
1434
1435         /* TODO improve static semantics, so either both or no values are NULL */
1436         if (true_val == NULL || false_val == NULL) return NULL;
1437
1438         ir_node *in[2] = { true_val, false_val };
1439         ir_mode *mode  = get_irn_mode(true_val);
1440         assert(get_irn_mode(false_val) == mode);
1441         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1442
1443         return val;
1444 }
1445
1446 static ir_node *select_addr(const select_expression_t *expression)
1447 {
1448         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1449
1450         ir_node *compound_addr = expression_to_firm(expression->compound);
1451
1452         declaration_t *entry = expression->compound_entry;
1453         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1454         ir_entity     *entity = entry->v.entity;
1455
1456         assert(entity != NULL);
1457
1458         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1459
1460         return sel;
1461 }
1462
1463 static ir_node *select_to_firm(const select_expression_t *expression)
1464 {
1465         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1466         ir_node  *addr   = select_addr(expression);
1467         type_t   *type   = revert_automatic_type_conversion(
1468                         (const expression_t*) expression);
1469         type             = skip_typeref(type);
1470         ir_type  *irtype = get_ir_type(type);
1471
1472         return deref_address(irtype, addr, dbgi);
1473 }
1474
1475 /* Values returned by __builtin_classify_type. */
1476 typedef enum gcc_type_class
1477 {
1478         no_type_class = -1,
1479         void_type_class,
1480         integer_type_class,
1481         char_type_class,
1482         enumeral_type_class,
1483         boolean_type_class,
1484         pointer_type_class,
1485         reference_type_class,
1486         offset_type_class,
1487         real_type_class,
1488         complex_type_class,
1489         function_type_class,
1490         method_type_class,
1491         record_type_class,
1492         union_type_class,
1493         array_type_class,
1494         string_type_class,
1495         set_type_class,
1496         file_type_class,
1497         lang_type_class
1498 } gcc_type_class;
1499
1500 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
1501 {
1502         const type_t *const type = expr->type_expression->base.datatype;
1503
1504         gcc_type_class tc;
1505         switch (type->type)
1506         {
1507                 case TYPE_ATOMIC: {
1508                         const atomic_type_t *const atomic_type = &type->atomic;
1509                         switch (atomic_type->atype) {
1510                                 // should not be reached
1511                                 case ATOMIC_TYPE_INVALID:
1512                                         tc = no_type_class;
1513                                         break;
1514
1515                                 // gcc cannot do that
1516                                 case ATOMIC_TYPE_VOID:
1517                                         tc = void_type_class;
1518                                         break;
1519
1520                                 case ATOMIC_TYPE_CHAR:      // gcc handles this as integer
1521                                 case ATOMIC_TYPE_SCHAR:     // gcc handles this as integer
1522                                 case ATOMIC_TYPE_UCHAR:     // gcc handles this as integer
1523                                 case ATOMIC_TYPE_SHORT:
1524                                 case ATOMIC_TYPE_USHORT:
1525                                 case ATOMIC_TYPE_INT:
1526                                 case ATOMIC_TYPE_UINT:
1527                                 case ATOMIC_TYPE_LONG:
1528                                 case ATOMIC_TYPE_ULONG:
1529                                 case ATOMIC_TYPE_LONGLONG:
1530                                 case ATOMIC_TYPE_ULONGLONG:
1531                                 case ATOMIC_TYPE_BOOL:      // gcc handles this as integer
1532                                         tc = integer_type_class;
1533                                         break;
1534
1535                                 case ATOMIC_TYPE_FLOAT:
1536                                 case ATOMIC_TYPE_DOUBLE:
1537                                 case ATOMIC_TYPE_LONG_DOUBLE:
1538                                         tc = real_type_class;
1539                                         break;
1540
1541 #ifdef PROVIDE_COMPLEX
1542                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
1543                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
1544                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
1545                                         tc = complex_type_class;
1546                                         break;
1547                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
1548                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
1549                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
1550                                         tc = complex_type_class;
1551                                         break;
1552 #endif
1553
1554                                 default:
1555                                         panic("Unimplemented case in classify_type_to_firm().");
1556                         }
1557                         break;
1558                 }
1559
1560                 case TYPE_ARRAY:           // gcc handles this as pointer
1561                 case TYPE_FUNCTION:        // gcc handles this as pointer
1562                 case TYPE_POINTER:         tc = pointer_type_class; break;
1563                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
1564                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
1565
1566                 // gcc handles this as integer
1567                 case TYPE_ENUM:            tc = integer_type_class; break;
1568
1569                 default:
1570                         panic("Unimplemented case in classify_type_to_firm().");
1571         }
1572
1573         dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
1574         ir_mode  *const mode = mode_Is;
1575         tarval   *const tv   = new_tarval_from_long(tc, mode);
1576         return new_d_Const(dbgi, mode, tv);
1577 }
1578
1579 static ir_node *function_name_to_firm(
1580                 const string_literal_expression_t *const expr)
1581 {
1582         if (current_function_name == NULL) {
1583                 const source_position_t *const src_pos =
1584                         &expr->expression.source_position;
1585                 const char *const name = current_function_decl->symbol->string;
1586                 current_function_name = string_to_firm(src_pos, "__func__", name);
1587         }
1588
1589         return current_function_name;
1590 }
1591
1592 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
1593 {
1594         statement_t *statement = expr->statement;
1595
1596         assert(statement->type == STATEMENT_COMPOUND);
1597         return compound_statement_to_firm((compound_statement_t*) statement);
1598 }
1599
1600 static ir_node *dereference_addr(const unary_expression_t *const expression)
1601 {
1602         assert(expression->type == UNEXPR_DEREFERENCE);
1603         return expression_to_firm(expression->value);
1604 }
1605
1606 static ir_node *expression_to_addr(const expression_t *expression)
1607 {
1608         switch(expression->type) {
1609         case EXPR_REFERENCE:
1610                 return reference_addr((const reference_expression_t*) expression);
1611         case EXPR_ARRAY_ACCESS:
1612                 return array_access_addr((const array_access_expression_t*) expression);
1613         case EXPR_SELECT:
1614                 return select_addr((const select_expression_t*) expression);
1615         case EXPR_UNARY: {
1616                 const unary_expression_t *const unary_expr =
1617                         (const unary_expression_t*)expression;
1618                 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1619                         return dereference_addr(unary_expr);
1620                 }
1621                 break;
1622         }
1623         default:
1624                 break;
1625         }
1626         panic("trying to get address of non-lvalue");
1627 }
1628
1629 static ir_node *_expression_to_firm(const expression_t *expression)
1630 {
1631         switch(expression->type) {
1632         case EXPR_CONST:
1633                 return const_to_firm(&expression->conste);
1634         case EXPR_STRING_LITERAL:
1635                 return string_literal_to_firm(&expression->string_literal);
1636         case EXPR_REFERENCE:
1637                 return reference_expression_to_firm(&expression->reference);
1638         case EXPR_CALL:
1639                 return call_expression_to_firm(&expression->call);
1640         case EXPR_UNARY:
1641                 return unary_expression_to_firm(&expression->unary);
1642         case EXPR_BINARY:
1643                 return binary_expression_to_firm(&expression->binary);
1644         case EXPR_ARRAY_ACCESS:
1645                 return array_access_to_firm(&expression->array_access);
1646         case EXPR_SIZEOF:
1647                 return sizeof_to_firm(&expression->sizeofe);
1648         case EXPR_CONDITIONAL:
1649                 return conditional_to_firm(&expression->conditional);
1650         case EXPR_SELECT:
1651                 return select_to_firm(&expression->select);
1652         case EXPR_CLASSIFY_TYPE:
1653                 return classify_type_to_firm(&expression->classify_type);
1654         case EXPR_FUNCTION:
1655         case EXPR_PRETTY_FUNCTION:
1656                 return function_name_to_firm(&expression->string_literal);
1657         case EXPR_STATEMENT:
1658                 return statement_expression_to_firm(&expression->statement);
1659         case EXPR_OFFSETOF:
1660         case EXPR_VA_ARG:
1661         case EXPR_BUILTIN_SYMBOL:
1662                 panic("unimplemented expression found");
1663
1664         case EXPR_UNKNOWN:
1665         case EXPR_INVALID:
1666                 break;
1667         }
1668         panic("invalid expression found");
1669 }
1670
1671 static ir_node *expression_to_firm(const expression_t *expression)
1672 {
1673         ir_node *res = _expression_to_firm(expression);
1674
1675         if(res != NULL && get_irn_mode(res) == mode_b) {
1676                 ir_mode *mode = get_ir_mode(expression->base.datatype);
1677                 res           = create_conv(NULL, res, mode);
1678         }
1679
1680         return res;
1681 }
1682
1683 static ir_node *expression_to_modeb(const expression_t *expression)
1684 {
1685         ir_node *res = _expression_to_firm(expression);
1686         res          = create_conv(NULL, res, mode_b);
1687
1688         return res;
1689 }
1690
1691 /**
1692  * create a short-circuit expression evaluation that tries to construct
1693  * efficient control flow structures for &&, || and ! expressions
1694  */
1695 static void create_condition_evaluation(const expression_t *expression,
1696                                         ir_node *true_block,
1697                                         ir_node *false_block)
1698 {
1699         switch(expression->type) {
1700         case EXPR_UNARY: {
1701                 unary_expression_t *unary_expression = (unary_expression_t*) expression;
1702                 if(unary_expression->type == UNEXPR_NOT) {
1703                         create_condition_evaluation(unary_expression->value, false_block,
1704                                                     true_block);
1705                         return;
1706                 }
1707                 break;
1708         }
1709         case EXPR_BINARY: {
1710                 binary_expression_t *binary_expression
1711                         = (binary_expression_t*) expression;
1712                 if(binary_expression->type == BINEXPR_LOGICAL_AND) {
1713                         ir_node *cur_block   = get_cur_block();
1714                         ir_node *extra_block = new_immBlock();
1715                         set_cur_block(cur_block);
1716                         create_condition_evaluation(binary_expression->left, extra_block,
1717                                                     false_block);
1718                         mature_immBlock(extra_block);
1719                         set_cur_block(extra_block);
1720                         create_condition_evaluation(binary_expression->right, true_block,
1721                                                     false_block);
1722                         return;
1723                 }
1724                 if(binary_expression->type == BINEXPR_LOGICAL_OR) {
1725                         ir_node *cur_block   = get_cur_block();
1726                         ir_node *extra_block = new_immBlock();
1727                         set_cur_block(cur_block);
1728                         create_condition_evaluation(binary_expression->left, true_block,
1729                                                     extra_block);
1730                         mature_immBlock(extra_block);
1731                         set_cur_block(extra_block);
1732                         create_condition_evaluation(binary_expression->right, true_block,
1733                                                     false_block);
1734                         return;
1735                 }
1736                 break;
1737         }
1738         default:
1739                 break;
1740         }
1741
1742         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
1743         ir_node  *condition  = expression_to_modeb(expression);
1744         ir_node  *cond       = new_d_Cond(dbgi, condition);
1745         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1746         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1747
1748         add_immBlock_pred(true_block, true_proj);
1749         add_immBlock_pred(false_block, false_proj);
1750
1751         set_cur_block(NULL);
1752 }
1753
1754
1755 static void return_statement_to_firm(return_statement_t *statement)
1756 {
1757         if(get_cur_block() == NULL)
1758                 return;
1759
1760
1761         ir_type *func_irtype = get_ir_type(current_function_decl->type);
1762
1763         ir_node *value = NULL;
1764         if(statement->return_value != NULL) {
1765                 value = expression_to_firm(statement->return_value);
1766         }
1767
1768         ir_node *in[1];
1769         int      in_len;
1770         if(get_method_n_ress(func_irtype) > 0) {
1771                 if(value == NULL) {
1772                         ir_type *res_type = get_method_res_type(func_irtype, 0);
1773                         ir_mode *mode     = get_type_mode(res_type);
1774                         value             = new_Unknown(mode);
1775                 }
1776
1777                 in[0]  = value;
1778                 in_len = 1;
1779         } else {
1780                 in_len = 0;
1781         }
1782
1783         dbg_info *dbgi  = get_dbg_info(&statement->statement.source_position);
1784         ir_node  *store = get_store();
1785         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
1786
1787         ir_node *end_block = get_irg_end_block(current_ir_graph);
1788         add_immBlock_pred(end_block, ret);
1789
1790         set_cur_block(NULL);
1791 }
1792
1793 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
1794 {
1795         if(get_cur_block() == NULL)
1796                 return NULL;
1797
1798         return expression_to_firm(statement->expression);
1799 }
1800
1801 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
1802 {
1803         ir_node     *result    = NULL;
1804         statement_t *statement = compound->statements;
1805         for( ; statement != NULL; statement = statement->base.next) {
1806                 //context2firm(&statement->context);
1807
1808                 if(statement->base.next == NULL
1809                                 && statement->type == STATEMENT_EXPRESSION) {
1810                         result = expression_statement_to_firm(
1811                                         (expression_statement_t*) statement);
1812                         break;
1813                 }
1814                 statement_to_firm(statement);
1815         }
1816
1817         return result;
1818 }
1819
1820 static void if_statement_to_firm(if_statement_t *statement)
1821 {
1822         ir_node *cur_block = get_cur_block();
1823
1824         ir_node *fallthrough_block = new_immBlock();
1825
1826         /* the true (blocks) */
1827         ir_node *true_block;
1828         if (statement->true_statement != NULL) {
1829                 true_block = new_immBlock();
1830                 statement_to_firm(statement->true_statement);
1831                 if(get_cur_block() != NULL) {
1832                         ir_node *jmp = new_Jmp();
1833                         add_immBlock_pred(fallthrough_block, jmp);
1834                 }
1835         } else {
1836                 true_block = fallthrough_block;
1837         }
1838
1839         /* the false (blocks) */
1840         ir_node *false_block;
1841         if(statement->false_statement != NULL) {
1842                 false_block = new_immBlock();
1843
1844                 statement_to_firm(statement->false_statement);
1845                 if(get_cur_block() != NULL) {
1846                         ir_node *jmp = new_Jmp();
1847                         add_immBlock_pred(fallthrough_block, jmp);
1848                 }
1849         } else {
1850                 false_block = fallthrough_block;
1851         }
1852
1853         /* create the condition */
1854         if(cur_block != NULL) {
1855                 set_cur_block(cur_block);
1856                 create_condition_evaluation(statement->condition, true_block,
1857                                             false_block);
1858         }
1859
1860         mature_immBlock(true_block);
1861         if(false_block != fallthrough_block) {
1862                 mature_immBlock(false_block);
1863         }
1864         mature_immBlock(fallthrough_block);
1865
1866         set_cur_block(fallthrough_block);
1867 }
1868
1869 static void while_statement_to_firm(while_statement_t *statement)
1870 {
1871         ir_node *jmp = NULL;
1872         if(get_cur_block() != NULL) {
1873                 jmp = new_Jmp();
1874         }
1875
1876         /* create the header block */
1877         ir_node *header_block = new_immBlock();
1878         if(jmp != NULL) {
1879                 add_immBlock_pred(header_block, jmp);
1880         }
1881
1882         /* the false block */
1883         ir_node *false_block = new_immBlock();
1884
1885         /* the loop body */
1886         ir_node *body_block;
1887         if (statement->body != NULL) {
1888                 ir_node *old_continue_label = continue_label;
1889                 ir_node *old_break_label    = break_label;
1890                 continue_label              = header_block;
1891                 break_label                 = false_block;
1892
1893                 body_block = new_immBlock();
1894                 statement_to_firm(statement->body);
1895
1896                 assert(continue_label == header_block);
1897                 assert(break_label    == false_block);
1898                 continue_label = old_continue_label;
1899                 break_label    = old_break_label;
1900
1901                 if(get_cur_block() != NULL) {
1902                         ir_node *jmp = new_Jmp();
1903                         add_immBlock_pred(header_block, jmp);
1904                 }
1905         } else {
1906                 body_block = header_block;
1907         }
1908
1909         /* create the condition */
1910         set_cur_block(header_block);
1911
1912         create_condition_evaluation(statement->condition, body_block, false_block);
1913         mature_immBlock(body_block);
1914         mature_immBlock(false_block);
1915         mature_immBlock(header_block);
1916
1917         set_cur_block(false_block);
1918 }
1919
1920 static void do_while_statement_to_firm(do_while_statement_t *statement)
1921 {
1922         ir_node *jmp = NULL;
1923         if(get_cur_block() != NULL) {
1924                 jmp = new_Jmp();
1925         }
1926
1927         /* create the header block */
1928         ir_node *header_block = new_immBlock();
1929
1930         /* the false block */
1931         ir_node *false_block = new_immBlock();
1932
1933         /* the loop body */
1934         ir_node *body_block = new_immBlock();
1935         if(jmp != NULL) {
1936                 add_immBlock_pred(body_block, jmp);
1937         }
1938
1939         if (statement->body != NULL) {
1940                 ir_node *old_continue_label = continue_label;
1941                 ir_node *old_break_label    = break_label;
1942                 continue_label              = header_block;
1943                 break_label                 = false_block;
1944
1945                 statement_to_firm(statement->body);
1946
1947                 assert(continue_label == header_block);
1948                 assert(break_label    == false_block);
1949                 continue_label = old_continue_label;
1950                 break_label    = old_break_label;
1951
1952                 if (get_cur_block() == NULL) {
1953                         mature_immBlock(header_block);
1954                         mature_immBlock(body_block);
1955                         mature_immBlock(false_block);
1956                         return;
1957                 }
1958         }
1959
1960         ir_node *body_jmp = new_Jmp();
1961         add_immBlock_pred(header_block, body_jmp);
1962         mature_immBlock(header_block);
1963
1964         /* create the condition */
1965         set_cur_block(header_block);
1966
1967         create_condition_evaluation(statement->condition, body_block, false_block);
1968         mature_immBlock(body_block);
1969         mature_immBlock(false_block);
1970         mature_immBlock(header_block);
1971
1972         set_cur_block(false_block);
1973 }
1974
1975 static void for_statement_to_firm(for_statement_t *statement)
1976 {
1977         ir_node *jmp = NULL;
1978         if (get_cur_block() != NULL) {
1979                 if(statement->initialisation != NULL) {
1980                         expression_to_firm(statement->initialisation);
1981                 }
1982                 jmp = new_Jmp();
1983         }
1984
1985         /* create the step block */
1986         ir_node *const step_block = new_immBlock();
1987         if (statement->step != NULL) {
1988                 expression_to_firm(statement->step);
1989         }
1990         ir_node *const step_jmp = new_Jmp();
1991
1992         /* create the header block */
1993         ir_node *const header_block = new_immBlock();
1994         if (jmp != NULL) {
1995                 add_immBlock_pred(header_block, jmp);
1996         }
1997         add_immBlock_pred(header_block, step_jmp);
1998
1999         /* the false block */
2000         ir_node *const false_block = new_immBlock();
2001
2002         /* the loop body */
2003         ir_node * body_block;
2004         if (statement->body != NULL) {
2005                 ir_node *const old_continue_label = continue_label;
2006                 ir_node *const old_break_label    = break_label;
2007                 continue_label = step_block;
2008                 break_label    = false_block;
2009
2010                 body_block = new_immBlock();
2011                 statement_to_firm(statement->body);
2012
2013                 assert(continue_label == step_block);
2014                 assert(break_label    == false_block);
2015                 continue_label = old_continue_label;
2016                 break_label    = old_break_label;
2017
2018                 if (get_cur_block() != NULL) {
2019                         ir_node *const jmp = new_Jmp();
2020                         add_immBlock_pred(step_block, jmp);
2021                 }
2022         } else {
2023                 body_block = step_block;
2024         }
2025
2026         /* create the condition */
2027         set_cur_block(header_block);
2028         if (statement->condition != NULL) {
2029                 create_condition_evaluation(statement->condition, body_block,
2030                                             false_block);
2031         } else {
2032                 keep_alive(header_block);
2033                 ir_node *jmp = new_Jmp();
2034                 add_immBlock_pred(body_block, jmp);
2035         }
2036
2037         mature_immBlock(body_block);
2038         mature_immBlock(false_block);
2039         mature_immBlock(step_block);
2040         mature_immBlock(header_block);
2041         mature_immBlock(false_block);
2042
2043         set_cur_block(false_block);
2044 }
2045
2046 static void create_declaration_entity(declaration_t *declaration,
2047                                       declaration_type_t declaration_type,
2048                                       ir_type *parent_type)
2049 {
2050         ident     *id     = new_id_from_str(declaration->symbol->string);
2051         ir_type   *irtype = get_ir_type(declaration->type);
2052         ir_entity *entity = new_entity(parent_type, id, irtype);
2053         set_entity_ld_ident(entity, id);
2054
2055         declaration->declaration_type = declaration_type;
2056         declaration->v.entity         = entity;
2057         set_entity_variability(entity, variability_uninitialized);
2058         /* TODO: visibility? */
2059 }
2060
2061 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
2062
2063 enum compound_graph_entry_type_t {
2064         COMPOUND_GRAPH_ENTRY_ARRAY,
2065         COMPOUND_GRAPH_ENTRY_COMPOUND
2066 };
2067
2068 struct compound_graph_path_entry_t {
2069         int type;
2070         union {
2071                 ir_entity *entity;
2072                 int        array_index;
2073         } v;
2074         compound_graph_path_entry_t *prev;
2075 };
2076
2077 static void create_initializer_object(initializer_t *initializer, type_t *type,
2078                 ir_entity *entity, compound_graph_path_entry_t *entry, int len);
2079
2080 static compound_graph_path *create_compound_path(ir_type *type,
2081                 compound_graph_path_entry_t *entry, int len)
2082 {
2083         compound_graph_path *path = new_compound_graph_path(type, len);
2084
2085         int i = len - 1;
2086         for( ; entry != NULL; entry = entry->prev, --i) {
2087                 assert(i >= 0);
2088                 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
2089                         set_compound_graph_path_node(path, i, entry->v.entity);
2090                 } else {
2091                         assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
2092                         set_compound_graph_path_array_index(path, i, entry->v.array_index);
2093                 }
2094         }
2095         assert(i == -1);
2096
2097         return path;
2098 }
2099
2100 static void create_initializer_value(initializer_value_t *initializer,
2101                                      ir_entity *entity,
2102                                      compound_graph_path_entry_t *entry,
2103                                      int len)
2104 {
2105         ir_node             *node = expression_to_firm(initializer->value);
2106         ir_type             *type = get_entity_type(entity);
2107         compound_graph_path *path = create_compound_path(type, entry, len);
2108         add_compound_ent_value_w_path(entity, node, path);
2109 }
2110
2111 static void create_initializer_compound(initializer_list_t *initializer,
2112                                         compound_type_t *type,
2113                                         ir_entity *entity,
2114                                         compound_graph_path_entry_t *last_entry,
2115                                         int len)
2116 {
2117         declaration_t *compound_declaration = type->declaration;
2118
2119         declaration_t *compound_entry = compound_declaration->context.declarations;
2120
2121         compound_graph_path_entry_t entry;
2122         entry.type = COMPOUND_GRAPH_ENTRY_COMPOUND;
2123         entry.prev = last_entry;
2124         ++len;
2125
2126         size_t i = 0;
2127         for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
2128                 if(compound_entry->symbol == NULL)
2129                         continue;
2130                 if(compound_entry->namespc != NAMESPACE_NORMAL)
2131                         continue;
2132
2133                 if(i >= initializer->len)
2134                         break;
2135
2136                 entry.v.entity = compound_entry->v.entity;
2137
2138                 initializer_t *sub_initializer = initializer->initializers[i];
2139
2140                 assert(compound_entry != NULL);
2141                 assert(compound_entry->declaration_type
2142                                 == DECLARATION_TYPE_COMPOUND_MEMBER);
2143
2144                 if(sub_initializer->type == INITIALIZER_VALUE) {
2145                         create_initializer_value(&sub_initializer->value,
2146                                                  entity, &entry, len);
2147                 } else {
2148                         type_t *type = skip_typeref(compound_entry->type);
2149                         create_initializer_object(sub_initializer, type, entity, &entry,
2150                                                   len);
2151                 }
2152
2153                 ++i;
2154         }
2155 }
2156
2157 static void create_initializer_array(initializer_list_t *initializer,
2158                                      array_type_t *type, ir_entity *entity,
2159                                      compound_graph_path_entry_t *last_entry,
2160                                      int len)
2161 {
2162         type_t *element_type = type->element_type;
2163         element_type         = skip_typeref(element_type);
2164
2165         compound_graph_path_entry_t entry;
2166         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2167         entry.prev = last_entry;
2168         ++len;
2169
2170         size_t i;
2171         for(i = 0; i < initializer->len; ++i) {
2172                 entry.v.array_index = i;
2173
2174                 initializer_t *sub_initializer = initializer->initializers[i];
2175
2176                 if(sub_initializer->type == INITIALIZER_VALUE) {
2177                         create_initializer_value(&sub_initializer->value,
2178                                                  entity, &entry, len);
2179                 } else {
2180                         create_initializer_object(sub_initializer, element_type, entity,
2181                                                   &entry, len);
2182                 }
2183         }
2184
2185 #if 0
2186         /* TODO: initializer rest... */
2187         if(type->size_expression != NULL) {
2188                 size_t array_len = fold_constant(type->size_expression);
2189                 for( ; i < array_len; ++i) {
2190
2191                 }
2192         }
2193 #endif
2194 }
2195
2196 static void create_initializer_string(initializer_string_t *initializer,
2197                                       array_type_t *type, ir_entity *entity,
2198                                       compound_graph_path_entry_t *last_entry,
2199                                       int len)
2200 {
2201         type_t *element_type = type->element_type;
2202         element_type         = skip_typeref(element_type);
2203
2204         compound_graph_path_entry_t entry;
2205         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2206         entry.prev = last_entry;
2207         ++len;
2208
2209         ir_type    *irtype  = get_entity_type(entity);
2210         size_t      arr_len = get_array_type_size(type);
2211         const char *p       = initializer->string;
2212         size_t      i       = 0;
2213         for(i = 0; i < arr_len; ++i, ++p) {
2214                 entry.v.array_index = i;
2215
2216                 ir_node             *node = new_Const_long(mode_Bs, *p);
2217                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2218                 add_compound_ent_value_w_path(entity, node, path);
2219
2220                 if(*p == '\0')
2221                         break;
2222         }
2223 }
2224
2225 static void create_initializer_object(initializer_t *initializer, type_t *type,
2226                 ir_entity *entity, compound_graph_path_entry_t *entry, int len)
2227 {
2228         if(type->type == TYPE_ARRAY) {
2229                 array_type_t *array_type = &type->array;
2230
2231                 if(initializer->type == INITIALIZER_STRING) {
2232                         initializer_string_t *string = &initializer->string;
2233                         create_initializer_string(string, array_type, entity, entry, len);
2234                 } else {
2235                         assert(initializer->type == INITIALIZER_LIST);
2236                         initializer_list_t *list = &initializer->list;
2237                         create_initializer_array(list, array_type, entity, entry, len);
2238                 }
2239         } else {
2240                 assert(initializer->type == INITIALIZER_LIST);
2241                 initializer_list_t *list = &initializer->list;
2242
2243                 assert(type->type == TYPE_COMPOUND_STRUCT
2244                                 || type->type == TYPE_COMPOUND_UNION);
2245                 compound_type_t *compound_type = &type->compound;
2246                 create_initializer_compound(list, compound_type, entity, entry, len);
2247         }
2248 }
2249
2250 static void create_initializer_local_variable_entity(declaration_t *declaration)
2251 {
2252         initializer_t *initializer = declaration->init.initializer;
2253         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
2254         ir_entity     *entity      = declaration->v.entity;
2255         ir_node       *memory      = get_store();
2256         ir_node       *nomem       = new_NoMem();
2257         ir_node       *frame       = get_irg_frame(current_ir_graph);
2258         ir_node       *addr        = new_d_simpleSel(dbgi, nomem, frame, entity);
2259
2260         if(is_atomic_entity(entity)) {
2261                 assert(initializer->type == INITIALIZER_VALUE);
2262                 initializer_value_t *initializer_value = &initializer->value;
2263
2264                 ir_node *value     = expression_to_firm(initializer_value->value);
2265                 ir_node *store     = new_d_Store(dbgi, memory, addr, value);
2266                 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2267                 set_store(store_mem);
2268                 return;
2269         }
2270
2271         /* create a "template" entity which is copied to the entity on the stack */
2272         ident     *id          = unique_ident("initializer");
2273         ir_type   *irtype      = get_ir_type(declaration->type);
2274         ir_type   *global_type = get_glob_type();
2275         ir_entity *init_entity = new_entity(global_type, id, irtype);
2276         set_entity_ld_ident(init_entity, id);
2277
2278         set_entity_variability(init_entity, variability_initialized);
2279         set_entity_visibility(init_entity, visibility_local);
2280
2281         ir_graph *old_current_ir_graph = current_ir_graph;
2282         current_ir_graph = get_const_code_irg();
2283
2284         type_t *type = skip_typeref(declaration->type);
2285         create_initializer_object(initializer, type, init_entity, NULL, 0);
2286
2287         assert(current_ir_graph == get_const_code_irg());
2288         current_ir_graph = old_current_ir_graph;
2289
2290         ir_node *src_addr  = create_symconst(dbgi, init_entity);
2291         ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
2292
2293         ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
2294         set_store(copyb_mem);
2295 }
2296
2297 static void create_initializer(declaration_t *declaration)
2298 {
2299         initializer_t *initializer = declaration->init.initializer;
2300         if(initializer == NULL)
2301                 return;
2302
2303         declaration_type_t declaration_type = (declaration_type_t)declaration->declaration_type;
2304         if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY) {
2305                 create_initializer_local_variable_entity(declaration);
2306                 return;
2307         }
2308
2309         if(initializer->type == INITIALIZER_VALUE) {
2310                 initializer_value_t *initializer_value = &initializer->value;
2311
2312                 ir_node *value = expression_to_firm(initializer_value->value);
2313
2314                 if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
2315                         set_value(declaration->v.value_number, value);
2316                 } else {
2317                         assert(declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2318
2319                         ir_entity *entity = declaration->v.entity;
2320
2321                         set_entity_variability(entity, variability_initialized);
2322                         set_atomic_ent_value(entity, value);
2323                 }
2324         } else {
2325                 declaration_type_t declaration_type = (declaration_type_t)declaration->declaration_type;
2326                 assert(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY
2327                                 || declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2328
2329                 ir_entity *entity = declaration->v.entity;
2330                 set_entity_variability(entity, variability_initialized);
2331
2332                 type_t *type = skip_typeref(declaration->type);
2333                 create_initializer_object(initializer, type, entity, NULL, 0);
2334         }
2335 }
2336
2337 static void create_local_variable(declaration_t *declaration)
2338 {
2339         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2340
2341         bool needs_entity = declaration->address_taken;
2342         type_t *type = skip_typeref(declaration->type);
2343
2344         if(type->type == TYPE_ARRAY
2345                         || type->type == TYPE_COMPOUND_STRUCT
2346                         || type->type == TYPE_COMPOUND_UNION) {
2347                 needs_entity = true;
2348         }
2349
2350         if(needs_entity) {
2351                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2352                 create_declaration_entity(declaration,
2353                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
2354                                           frame_type);
2355         } else {
2356                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2357                 declaration->v.value_number   = next_value_number_function;
2358                 ++next_value_number_function;
2359         }
2360
2361         create_initializer(declaration);
2362 }
2363
2364 static void create_local_static_variable(declaration_t *declaration)
2365 {
2366         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2367
2368         type_t    *type        = skip_typeref(declaration->type);
2369         ir_type   *global_type = get_glob_type();
2370         ident     *id          = unique_ident(declaration->symbol->string);
2371         ir_type   *irtype      = get_ir_type(type);
2372         ir_entity *entity      = new_entity(global_type, id, irtype);
2373         set_entity_ld_ident(entity, id);
2374
2375         declaration->declaration_type = DECLARATION_TYPE_GLOBAL_VARIABLE;
2376         declaration->v.entity         = entity;
2377         set_entity_variability(entity, variability_uninitialized);
2378         set_entity_visibility(entity, visibility_local);
2379
2380         ir_graph *old_current_ir_graph = current_ir_graph;
2381         current_ir_graph = get_const_code_irg();
2382
2383         create_initializer(declaration);
2384
2385         assert(current_ir_graph == get_const_code_irg());
2386         current_ir_graph = old_current_ir_graph;
2387 }
2388
2389 static void declaration_statement_to_firm(declaration_statement_t *statement)
2390 {
2391         declaration_t *declaration = statement->declarations_begin;
2392         declaration_t *end         = statement->declarations_end->next;
2393         for( ; declaration != end; declaration = declaration->next) {
2394                 type_t *type = declaration->type;
2395
2396                 switch(declaration->storage_class) {
2397                 case STORAGE_CLASS_TYPEDEF:
2398                         continue;
2399                 case STORAGE_CLASS_STATIC:
2400                         create_local_static_variable(declaration);
2401                         continue;
2402                 case STORAGE_CLASS_ENUM_ENTRY:
2403                         panic("enum entry declaration in local block found");
2404                 case STORAGE_CLASS_EXTERN:
2405                         panic("extern declaration in local block found");
2406                 case STORAGE_CLASS_NONE:
2407                 case STORAGE_CLASS_AUTO:
2408                 case STORAGE_CLASS_REGISTER:
2409                         if(type->type == TYPE_FUNCTION) {
2410                                 panic("nested functions not supported yet");
2411                         } else {
2412                                 create_local_variable(declaration);
2413                         }
2414                         continue;
2415                 }
2416                 panic("invalid storage class found");
2417         }
2418 }
2419
2420 static void create_jump_statement(const statement_t *statement,
2421                                   ir_node *target_block)
2422 {
2423         if(get_cur_block() == NULL)
2424                 return;
2425
2426         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
2427         ir_node  *jump = new_d_Jmp(dbgi);
2428         add_immBlock_pred(target_block, jump);
2429
2430         set_cur_block(NULL);
2431 }
2432
2433 static void switch_statement_to_firm(const switch_statement_t *statement)
2434 {
2435         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2436
2437         ir_node *expression  = expression_to_firm(statement->expression);
2438         ir_node *cond        = new_d_Cond(dbgi, expression);
2439         ir_node *break_block = new_immBlock();
2440
2441         set_cur_block(NULL);
2442
2443         ir_node *const old_switch_cond       = current_switch_cond;
2444         ir_node *const old_break_label       = break_label;
2445         const bool     old_saw_default_label = saw_default_label;
2446         current_switch_cond                  = cond;
2447         break_label                          = break_block;
2448
2449         statement_to_firm(statement->body);
2450
2451         if(get_cur_block() != NULL) {
2452                 ir_node *jmp = new_Jmp();
2453                 add_immBlock_pred(break_block, jmp);
2454         }
2455
2456         if (!saw_default_label) {
2457                 set_cur_block(get_nodes_block(cond));
2458                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
2459                                                         MAGIC_DEFAULT_PN_NUMBER);
2460                 add_immBlock_pred(break_block, proj);
2461         }
2462
2463         assert(current_switch_cond == cond);
2464         assert(break_label         == break_block);
2465         current_switch_cond = old_switch_cond;
2466         break_label         = old_break_label;
2467         saw_default_label   = old_saw_default_label;
2468
2469         mature_immBlock(break_block);
2470         set_cur_block(break_block);
2471 }
2472
2473 static long fold_constant(const expression_t *expression)
2474 {
2475         ir_graph *old_current_ir_graph = current_ir_graph;
2476         current_ir_graph = get_const_code_irg();
2477
2478         ir_node *cnst = expression_to_firm(expression);
2479         if(!is_Const(cnst)) {
2480                 panic("couldn't fold constantl");
2481         }
2482         tarval *tv = get_Const_tarval(cnst);
2483         if(!tarval_is_long(tv)) {
2484                 panic("folded constant not an integer");
2485         }
2486
2487         long res = get_tarval_long(tv);
2488
2489         current_ir_graph = old_current_ir_graph;
2490         return res;
2491 }
2492
2493 static void case_label_to_firm(const case_label_statement_t *statement)
2494 {
2495         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2496
2497         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
2498
2499         /* let's create a node and hope firm constant folding creates a Const
2500          * node... */
2501         ir_node *proj;
2502         set_cur_block(get_nodes_block(current_switch_cond));
2503         if(statement->expression) {
2504                 long pn = fold_constant(statement->expression);
2505                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
2506                         /* oops someone detected our cheating... */
2507                         panic("magic default pn used");
2508                 }
2509                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
2510         } else {
2511                 saw_default_label = true;
2512                 proj = new_d_defaultProj(dbgi, current_switch_cond,
2513                                          MAGIC_DEFAULT_PN_NUMBER);
2514         }
2515
2516         ir_node *block = new_immBlock();
2517         if (fallthrough != NULL) {
2518                 add_immBlock_pred(block, fallthrough);
2519         }
2520         add_immBlock_pred(block, proj);
2521         mature_immBlock(block);
2522
2523         statement_to_firm(statement->label_statement);
2524 }
2525
2526 static ir_node *get_label_block(declaration_t *label)
2527 {
2528         assert(label->namespc == NAMESPACE_LABEL);
2529
2530         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
2531                 return label->v.block;
2532         }
2533         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
2534
2535         ir_node *old_cur_block = get_cur_block();
2536         ir_node *block         = new_immBlock();
2537         set_cur_block(old_cur_block);
2538
2539         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
2540         label->v.block          = block;
2541
2542         ARR_APP1(ir_node *, imature_blocks, block);
2543
2544         return block;
2545 }
2546
2547 static void label_to_firm(const label_statement_t *statement)
2548 {
2549         ir_node *block = get_label_block(statement->label);
2550
2551         if(get_cur_block() != NULL) {
2552                 ir_node *jmp = new_Jmp();
2553                 add_immBlock_pred(block, jmp);
2554         }
2555
2556         set_cur_block(block);
2557         keep_alive(block);
2558
2559         statement_to_firm(statement->label_statement);
2560 }
2561
2562 static void goto_to_firm(const goto_statement_t *statement)
2563 {
2564         if(get_cur_block() == NULL)
2565                 return;
2566
2567         ir_node *block = get_label_block(statement->label);
2568         ir_node *jmp   = new_Jmp();
2569         add_immBlock_pred(block, jmp);
2570
2571         set_cur_block(NULL);
2572 }
2573
2574 static void statement_to_firm(statement_t *statement)
2575 {
2576         switch(statement->type) {
2577         case STATEMENT_COMPOUND:
2578                 compound_statement_to_firm((compound_statement_t*) statement);
2579                 return;
2580         case STATEMENT_RETURN:
2581                 return_statement_to_firm((return_statement_t*) statement);
2582                 return;
2583         case STATEMENT_EXPRESSION:
2584                 expression_statement_to_firm((expression_statement_t*) statement);
2585                 return;
2586         case STATEMENT_IF:
2587                 if_statement_to_firm((if_statement_t*) statement);
2588                 return;
2589         case STATEMENT_WHILE:
2590                 while_statement_to_firm((while_statement_t*) statement);
2591                 return;
2592         case STATEMENT_DO_WHILE:
2593                 do_while_statement_to_firm((do_while_statement_t*) statement);
2594                 return;
2595         case STATEMENT_DECLARATION:
2596                 declaration_statement_to_firm((declaration_statement_t*) statement);
2597                 return;
2598         case STATEMENT_BREAK:
2599                 create_jump_statement(statement, break_label);
2600                 return;
2601         case STATEMENT_CONTINUE:
2602                 create_jump_statement(statement, continue_label);
2603                 return;
2604         case STATEMENT_SWITCH:
2605                 switch_statement_to_firm((switch_statement_t*) statement);
2606                 return;
2607         case STATEMENT_CASE_LABEL:
2608                 case_label_to_firm((case_label_statement_t*) statement);
2609                 return;
2610         case STATEMENT_FOR:
2611                 for_statement_to_firm((for_statement_t*) statement);
2612                 return;
2613         case STATEMENT_LABEL:
2614                 label_to_firm((label_statement_t*) statement);
2615                 return;
2616         case STATEMENT_GOTO:
2617                 goto_to_firm((goto_statement_t*) statement);
2618                 return;
2619         default:
2620                 break;
2621         }
2622         panic("Statement not implemented\n");
2623 }
2624
2625 static int count_local_declarations(const declaration_t *      decl,
2626                                     const declaration_t *const end)
2627 {
2628         int count = 0;
2629         for (; decl != end; decl = decl->next) {
2630                 const type_t *type = skip_typeref(decl->type);
2631                 switch (type->type) {
2632                         case TYPE_ATOMIC:
2633                         case TYPE_ENUM:
2634                         case TYPE_POINTER:
2635                                 if (!decl->address_taken)
2636                                         ++count;
2637                                 break;
2638
2639                         default: break;
2640                 }
2641         }
2642         return count;
2643 }
2644
2645 static int count_decls_in_stmts(const statement_t *stmt)
2646 {
2647         int count = 0;
2648         for (; stmt != NULL; stmt = stmt->base.next) {
2649                 switch (stmt->type) {
2650                         case STATEMENT_DECLARATION: {
2651                                 const declaration_statement_t *const decl_stmt =
2652                                         (const declaration_statement_t*)stmt;
2653                                 count += count_local_declarations(decl_stmt->declarations_begin,
2654                                                                   decl_stmt->declarations_end->next);
2655                                 break;
2656                         }
2657
2658                         case STATEMENT_COMPOUND: {
2659                                 const compound_statement_t *const comp =
2660                                         (const compound_statement_t*)stmt;
2661                                 count += count_decls_in_stmts(comp->statements);
2662                                 break;
2663                         }
2664
2665                         case STATEMENT_IF: {
2666                                 const if_statement_t *const if_stmt = (const if_statement_t*)stmt;
2667                                 count += count_decls_in_stmts(if_stmt->true_statement);
2668                                 count += count_decls_in_stmts(if_stmt->false_statement);
2669                                 break;
2670                         }
2671
2672                         case STATEMENT_SWITCH: {
2673                                 const switch_statement_t *const switch_stmt =
2674                                         (const switch_statement_t*)stmt;
2675                                 count += count_decls_in_stmts(switch_stmt->body);
2676                                 break;
2677                         }
2678
2679                         case STATEMENT_LABEL: {
2680                                 const label_statement_t *const label_stmt =
2681                                         (const label_statement_t*)stmt;
2682                                 count += count_decls_in_stmts(label_stmt->label_statement);
2683                                 break;
2684                         }
2685
2686                         case STATEMENT_WHILE: {
2687                                 const while_statement_t *const while_stmt =
2688                                         (const while_statement_t*)stmt;
2689                                 count += count_decls_in_stmts(while_stmt->body);
2690                                 break;
2691                         }
2692
2693                         case STATEMENT_DO_WHILE: {
2694                                 const do_while_statement_t *const do_while_stmt =
2695                                         (const do_while_statement_t*)stmt;
2696                                 count += count_decls_in_stmts(do_while_stmt->body);
2697                                 break;
2698                         }
2699
2700                         case STATEMENT_FOR: {
2701                                 const for_statement_t *const for_stmt =
2702                                         (const for_statement_t*)stmt;
2703                                 /* TODO initialisation */
2704                                 count += count_decls_in_stmts(for_stmt->body);
2705                                 break;
2706                         }
2707
2708                         case STATEMENT_BREAK:
2709                         case STATEMENT_CASE_LABEL:
2710                         case STATEMENT_CONTINUE:
2711                         case STATEMENT_EXPRESSION:
2712                         case STATEMENT_GOTO:
2713                         case STATEMENT_INVALID:
2714                         case STATEMENT_RETURN:
2715                                 break;
2716                 }
2717         }
2718         return count;
2719 }
2720
2721 static int get_function_n_local_vars(declaration_t *declaration)
2722 {
2723         int count = 0;
2724
2725         /* count parameters */
2726         count += count_local_declarations(declaration->context.declarations, NULL);
2727
2728         /* count local variables declared in body */
2729         count += count_decls_in_stmts(declaration->init.statement);
2730
2731         /* TODO FIXME: Matze: I'm lazy don't want to scan all expressions
2732          * for expression statements... */
2733         count += 10;
2734
2735         return count;
2736 }
2737
2738 static void initialize_function_parameters(declaration_t *declaration)
2739 {
2740         ir_graph        *irg             = current_ir_graph;
2741         ir_node         *args            = get_irg_args(irg);
2742         ir_node         *start_block     = get_irg_start_block(irg);
2743         ir_type         *function_irtype = get_ir_type(declaration->type);
2744
2745         int            n         = 0;
2746         declaration_t *parameter = declaration->context.declarations;
2747         for( ; parameter != NULL; parameter = parameter->next, ++n) {
2748                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
2749                 type_t *type = skip_typeref(parameter->type);
2750
2751                 bool needs_entity = parameter->address_taken;
2752                 if(type->type == TYPE_COMPOUND_STRUCT
2753                                 || type->type == TYPE_COMPOUND_UNION) {
2754                         needs_entity = true;
2755                 }
2756
2757                 if(needs_entity) {
2758                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
2759                         ident     *id     = new_id_from_str(parameter->symbol->string);
2760                         set_entity_ident(entity, id);
2761
2762                         parameter->declaration_type
2763                                 = DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY;
2764                         parameter->v.entity = entity;
2765                         continue;
2766                 }
2767
2768                 ir_mode *mode = get_ir_mode(parameter->type);
2769                 long     pn   = n;
2770                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2771
2772                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2773                 parameter->v.value_number   = next_value_number_function;
2774                 ++next_value_number_function;
2775
2776                 set_value(parameter->v.value_number, proj);
2777         }
2778 }
2779
2780 static void create_function(declaration_t *declaration)
2781 {
2782         ir_entity *entity = get_function_entity(declaration);
2783
2784         if(declaration->init.statement == NULL)
2785                 return;
2786
2787         current_function_decl = declaration;
2788         current_function_name = NULL;
2789
2790         assert(imature_blocks == NULL);
2791         imature_blocks = NEW_ARR_F(ir_node*, 0);
2792
2793         int       n_local_vars = get_function_n_local_vars(declaration);
2794         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
2795         ir_node  *first_block  = get_cur_block();
2796
2797         next_value_number_function = 0;
2798         initialize_function_parameters(declaration);
2799
2800         statement_to_firm(declaration->init.statement);
2801
2802         ir_node *end_block = get_irg_end_block(irg);
2803
2804         /* do we have a return statement yet? */
2805         if(get_cur_block() != NULL) {
2806                 assert(declaration->type->type == TYPE_FUNCTION);
2807                 const function_type_t* const func_type = &declaration->type->function;
2808
2809                 ir_node *ret;
2810                 if (func_type->result_type == type_void) {
2811                         ret = new_Return(get_store(), 0, NULL);
2812                 } else {
2813                         ir_mode *const mode = get_ir_mode(func_type->result_type);
2814                         ir_node *      in[1];
2815                         // §5.1.2.2.3 main implicitly returns 0
2816                         if (strcmp(declaration->symbol->string, "main") == 0) {
2817                                 in[0] = new_Const(mode, get_mode_null(mode));
2818                         } else {
2819                                 in[0] = new_Unknown(mode);
2820                         }
2821                         ret = new_Return(get_store(), 1, in);
2822                 }
2823                 add_immBlock_pred(end_block, ret);
2824         }
2825
2826         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2827                 mature_immBlock(imature_blocks[i]);
2828         }
2829         DEL_ARR_F(imature_blocks);
2830         imature_blocks = NULL;
2831
2832         mature_immBlock(first_block);
2833         mature_immBlock(end_block);
2834
2835         irg_finalize_cons(irg);
2836
2837         /* finalize the frame type */
2838         ir_type *frame_type = get_irg_frame_type(irg);
2839         int      n          = get_compound_n_members(frame_type);
2840         int      align_all  = 4;
2841         int      offset     = 0;
2842         for(int i = 0; i < n; ++i) {
2843                 ir_entity *entity      = get_compound_member(frame_type, i);
2844                 ir_type   *entity_type = get_entity_type(entity);
2845
2846                 int align = get_type_alignment_bytes(entity_type);
2847                 if(align > align_all)
2848                         align_all = align;
2849                 int misalign = 0;
2850                 if(align > 0) {
2851                         misalign  = offset % align;
2852                         if(misalign > 0) {
2853                                 offset += align - misalign;
2854                         }
2855                 }
2856
2857                 set_entity_offset(entity, offset);
2858                 offset += get_type_size_bytes(entity_type);
2859         }
2860         set_type_size_bytes(frame_type, offset);
2861         set_type_alignment_bytes(frame_type, align_all);
2862         set_type_state(frame_type, layout_fixed);
2863
2864         irg_vrfy(irg);
2865 }
2866
2867 static void create_global_variable(declaration_t *declaration)
2868 {
2869         ir_type   *global_type = get_glob_type();
2870         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
2871                                   global_type);
2872
2873         ir_entity *entity = declaration->v.entity;
2874         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
2875                 set_entity_visibility(entity, visibility_local);
2876         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
2877                 set_entity_visibility(entity, visibility_external_allocated);
2878         } else {
2879                 set_entity_visibility(entity, visibility_external_visible);
2880         }
2881         current_ir_graph = get_const_code_irg();
2882         create_initializer(declaration);
2883 }
2884
2885 static void context_to_firm(context_t *context)
2886 {
2887         /* first pass: create declarations */
2888         declaration_t *declaration = context->declarations;
2889         for( ; declaration != NULL; declaration = declaration->next) {
2890                 if(declaration->namespc != NAMESPACE_NORMAL)
2891                         continue;
2892                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2893                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2894                         continue;
2895                 if(declaration->symbol == NULL)
2896                         continue;
2897
2898                 type_t *type = declaration->type;
2899                 if(type->type == TYPE_FUNCTION) {
2900                         get_function_entity(declaration);
2901                 } else {
2902                         create_global_variable(declaration);
2903                 }
2904         }
2905
2906         /* second pass: create code */
2907         declaration = context->declarations;
2908         for( ; declaration != NULL; declaration = declaration->next) {
2909                 if(declaration->namespc != NAMESPACE_NORMAL)
2910                         continue;
2911                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2912                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2913                         continue;
2914                 if(declaration->symbol == NULL)
2915                         continue;
2916
2917                 type_t *type = declaration->type;
2918                 if(type->type != TYPE_FUNCTION)
2919                         continue;
2920
2921                 create_function(declaration);
2922         }
2923 }
2924
2925 void translation_unit_to_firm(translation_unit_t *unit)
2926 {
2927         /* just to be sure */
2928         continue_label      = NULL;
2929         break_label         = NULL;
2930         current_switch_cond = NULL;
2931
2932         context_to_firm(& unit->context);
2933 }