nsz Git - cparser/blob - ast2firm.c

   1 #include <config.h>
   2
   3 #define _GNU_SOURCE
   4
   5 #include <assert.h>
   6 #include <string.h>
   7 #include <stdbool.h>
   8
   9 #include <libfirm/firm.h>
  10 #include <libfirm/adt/obst.h>
  11
  12 #include "ast2firm.h"
  13
  14 #include "adt/error.h"
  15 #include "adt/array.h"
  16 #include "token_t.h"
  17 #include "type_t.h"
  18 #include "ast_t.h"
  19
  20 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  21
  22 static ir_type *ir_type_const_char;
  23 static ir_type *ir_type_void;
  24 static ir_type *ir_type_int;
  25 static ir_type *ir_type_void_ptr;
  26
  27 static type_t *type_const_char;
  28 static type_t *type_void;
  29 static type_t *type_int;
  30
  31 static int       next_value_number_function;
  32 static ir_node  *continue_label;
  33 static ir_node  *break_label;
  34 static ir_node  *current_switch_cond;
  35 static bool      saw_default_label;
  36 static ir_node **imature_blocks;
  37
  38 typedef enum declaration_type_t {
  39         DECLARATION_TYPE_UNKNOWN,
  40         DECLARATION_TYPE_FUNCTION,
  41         DECLARATION_TYPE_GLOBAL_VARIABLE,
  42         DECLARATION_TYPE_LOCAL_VARIABLE,
  43         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  44         DECLARATION_TYPE_COMPOUND_MEMBER,
  45         DECLARATION_TYPE_LABEL_BLOCK,
  46 } declaration_type_t;
  47
  48 static ir_type *get_ir_type(type_t *type);
  49
  50 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  51 {
  52         (void) pos;
  53 #if 0
  54         const declaration_t *declaration = & value_numbers[pos]->declaration;
  55
  56         print_warning_prefix(declaration->source_position);
  57         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  58                         declaration->symbol->string);
  59 #endif
  60         fprintf(stderr, "Some variable might be used uninitialized\n");
  61         return new_r_Unknown(irg, mode);
  62 }
  63
  64 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  65 {
  66         const source_position_t *pos = (const source_position_t*) dbg;
  67         if(pos == NULL)
  68                 return 0;
  69         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  70                                    pos->linenr);
  71 }
  72
  73 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  74 {
  75         const source_position_t *pos = (const source_position_t*) dbg;
  76         if(pos == NULL)
  77                 return NULL;
  78         if(line != NULL)
  79                 *line = pos->linenr;
  80         return pos->input_name;
  81 }
  82
  83 void init_ast2firm(void)
  84 {
  85         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  86         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
  87         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
  88
  89         ir_type_int        = get_ir_type(type_int);
  90         ir_type_const_char = get_ir_type(type_const_char);
  91         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  92                                                        type in firm */
  93         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
  94                                               ir_type_void, mode_P_data);
  95
  96         type_void->firm_type = ir_type_void;
  97 }
  98
  99 void exit_ast2firm(void)
 100 {
 101 }
 102
 103 static unsigned unique_id = 0;
 104
 105 static ident *unique_ident(const char *tag)
 106 {
 107         char buf[256];
 108
 109         snprintf(buf, sizeof(buf), "%s.%d", tag, unique_id);
 110         unique_id++;
 111         return new_id_from_str(buf);
 112 }
 113
 114 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 115 {
 116         switch(atomic_type->atype) {
 117         case ATOMIC_TYPE_SCHAR:
 118         case ATOMIC_TYPE_CHAR:
 119                 return mode_Bs;
 120         case ATOMIC_TYPE_UCHAR:
 121                 return mode_Bu;
 122         case ATOMIC_TYPE_SHORT:
 123                 return mode_Hs;
 124         case ATOMIC_TYPE_USHORT:
 125                 return mode_Hu;
 126         case ATOMIC_TYPE_LONG:
 127         case ATOMIC_TYPE_INT:
 128                 return mode_Is;
 129         case ATOMIC_TYPE_ULONG:
 130         case ATOMIC_TYPE_UINT:
 131                 return mode_Iu;
 132         case ATOMIC_TYPE_LONGLONG:
 133                 return mode_Ls;
 134         case ATOMIC_TYPE_ULONGLONG:
 135                 return mode_Lu;
 136         case ATOMIC_TYPE_FLOAT:
 137                 return mode_F;
 138         case ATOMIC_TYPE_DOUBLE:
 139                 return mode_D;
 140         case ATOMIC_TYPE_LONG_DOUBLE:
 141                 return mode_E;
 142         case ATOMIC_TYPE_BOOL:
 143                 return mode_b;
 144 #ifdef PROVIDE_COMPLEX
 145         case ATOMIC_TYPE_FLOAT_COMPLEX:
 146         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 147         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 148                 panic("complex lowering not implemented yet");
 149                 break;
 150         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 151         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 152         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 153                 panic("imaginary lowering not implemented yet");
 154                 break;
 155 #endif
 156         case ATOMIC_TYPE_VOID:
 157                 /* firm has no real void... */
 158                 return mode_Is;
 159         case ATOMIC_TYPE_INVALID:
 160                 break;
 161         }
 162         panic("Encountered unknown atomic type");
 163 }
 164
 165
 166 static unsigned get_type_size(type_t *type);
 167
 168 static unsigned get_atomic_type_size(const atomic_type_t *type)
 169 {
 170         switch(type->atype) {
 171         case ATOMIC_TYPE_CHAR:
 172         case ATOMIC_TYPE_SCHAR:
 173         case ATOMIC_TYPE_UCHAR:
 174                 return 1;
 175
 176         case ATOMIC_TYPE_SHORT:
 177         case ATOMIC_TYPE_USHORT:
 178                 return 2;
 179
 180         case ATOMIC_TYPE_BOOL:
 181         case ATOMIC_TYPE_INT:
 182         case ATOMIC_TYPE_UINT:
 183         case ATOMIC_TYPE_LONG:
 184         case ATOMIC_TYPE_ULONG:
 185         case ATOMIC_TYPE_FLOAT:
 186                 return 4;
 187
 188         case ATOMIC_TYPE_LONGLONG:
 189         case ATOMIC_TYPE_ULONGLONG:
 190         case ATOMIC_TYPE_DOUBLE:
 191                 return 8;
 192
 193         case ATOMIC_TYPE_LONG_DOUBLE:
 194                 return 12;
 195
 196         case ATOMIC_TYPE_VOID:
 197                 return 1;
 198
 199         case ATOMIC_TYPE_INVALID:
 200                 break;
 201         }
 202         panic("Trying to determine size of invalid atomic type");
 203 }
 204
 205 static unsigned get_compound_type_size(compound_type_t *type)
 206 {
 207         ir_type *irtype = get_ir_type(&type->type);
 208         return get_type_size_bytes(irtype);
 209 }
 210
 211 static unsigned get_array_type_size(array_type_t *type)
 212 {
 213         ir_type *irtype = get_ir_type(&type->type);
 214         return get_type_size_bytes(irtype);
 215 }
 216
 217 static unsigned get_type_size(type_t *type)
 218 {
 219         type = skip_typeref(type);
 220
 221         switch(type->type) {
 222         case TYPE_ATOMIC:
 223                 return get_atomic_type_size((const atomic_type_t*) type);
 224         case TYPE_ENUM:
 225                 return get_mode_size_bytes(mode_Is);
 226         case TYPE_COMPOUND_UNION:
 227         case TYPE_COMPOUND_STRUCT:
 228                 return get_compound_type_size((compound_type_t*) type);
 229         case TYPE_FUNCTION:
 230                 /* just a pointer to the function */
 231                 return get_mode_size_bytes(mode_P_code);
 232         case TYPE_POINTER:
 233                 return get_mode_size_bytes(mode_P_data);
 234         case TYPE_ARRAY:
 235                 return get_array_type_size((array_type_t*) type);
 236         case TYPE_BUILTIN:
 237         case TYPE_TYPEDEF:
 238         case TYPE_TYPEOF:
 239         case TYPE_INVALID:
 240                 break;
 241         }
 242         panic("Trying to determine size of invalid type");
 243 }
 244
 245 static unsigned count_parameters(const function_type_t *function_type)
 246 {
 247         unsigned count = 0;
 248
 249         function_parameter_t *parameter = function_type->parameters;
 250         for ( ; parameter != NULL; parameter = parameter->next) {
 251                 ++count;
 252         }
 253
 254         return count;
 255 }
 256
 257
 258
 259
 260 static long fold_constant(const expression_t *expression);
 261
 262 static ir_type *create_atomic_type(const atomic_type_t *type)
 263 {
 264         ir_mode *mode   = get_atomic_mode(type);
 265         ident   *id     = get_mode_ident(mode);
 266         ir_type *irtype = new_type_primitive(id, mode);
 267
 268         return irtype;
 269 }
 270
 271 static ir_type *create_method_type(const function_type_t *function_type)
 272 {
 273         type_t  *result_type  = function_type->result_type;
 274
 275         ident   *id           = unique_ident("functiontype");
 276         int      n_parameters = count_parameters(function_type);
 277         int      n_results    = result_type == type_void ? 0 : 1;
 278         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 279
 280         if(result_type != type_void) {
 281                 ir_type *restype = get_ir_type(result_type);
 282                 set_method_res_type(irtype, 0, restype);
 283         }
 284
 285         function_parameter_t *parameter = function_type->parameters;
 286         int                   n         = 0;
 287         for( ; parameter != NULL; parameter = parameter->next) {
 288                 ir_type *p_irtype = get_ir_type(parameter->type);
 289                 set_method_param_type(irtype, n, p_irtype);
 290                 ++n;
 291         }
 292
 293         if(function_type->variadic || function_type->unspecified_parameters) {
 294                 set_method_variadicity(irtype, variadicity_variadic);
 295         }
 296
 297         return irtype;
 298 }
 299
 300 static ir_type *create_pointer_type(pointer_type_t *type)
 301 {
 302         type_t  *points_to = type->points_to;
 303         ir_type *ir_points_to;
 304         /* Avoid endless recursion if the points_to type contains this poiner type
 305          * again (might be a struct). We therefore first create a void* pointer
 306          * and then set the real points_to type
 307          */
 308         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 309                                             ir_type_void, mode_P_data);
 310         type->type.firm_type  = ir_type;
 311
 312         ir_points_to = get_ir_type(points_to);
 313         set_pointer_points_to_type(ir_type, ir_points_to);
 314
 315         return ir_type;
 316 }
 317
 318 static ir_type *create_array_type(array_type_t *type)
 319 {
 320         type_t  *element_type    = type->element_type;
 321         ir_type *ir_element_type = get_ir_type(element_type);
 322
 323         ident   *id      = unique_ident("array");
 324         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 325
 326         if(type->size != NULL) {
 327                 int n_elements = fold_constant(type->size);
 328
 329                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 330
 331                 size_t elemsize = get_type_size_bytes(ir_element_type);
 332                 int align = get_type_alignment_bytes(ir_element_type);
 333                 if(elemsize % align > 0) {
 334                         elemsize += align - (elemsize % align);
 335                 }
 336                 set_type_size_bytes(ir_type, n_elements * elemsize);
 337                 set_type_alignment_bytes(ir_type, align);
 338                 set_type_state(ir_type, layout_fixed);
 339         }
 340
 341         return ir_type;
 342 }
 343
 344 #define INVALID_TYPE ((ir_type_ptr)-1)
 345
 346 static ir_type *create_struct_type(compound_type_t *type)
 347 {
 348         symbol_t *symbol = type->declaration->symbol;
 349         ident    *id;
 350         if(symbol != NULL) {
 351                 id = unique_ident(symbol->string);
 352         } else {
 353                 id = unique_ident("__anonymous_struct");
 354         }
 355         ir_type *ir_type = new_type_struct(id);
 356
 357         type->type.firm_type = ir_type;
 358
 359         int align_all = 1;
 360         int offset    = 0;
 361         declaration_t *entry = type->declaration->context.declarations;
 362         for( ; entry != NULL; entry = entry->next) {
 363                 if(entry->namespace != NAMESPACE_NORMAL)
 364                         continue;
 365
 366                 ident       *ident         = new_id_from_str(entry->symbol->string);
 367                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 368
 369                 int entry_size      = get_type_size_bytes(entry_ir_type);
 370                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 371                 int misalign = offset % entry_alignment;
 372                 offset += misalign;
 373
 374                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 375                 set_entity_offset(entity, offset);
 376                 add_struct_member(ir_type, entity);
 377                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 378                 entry->v.entity         = entity;
 379
 380                 offset += entry_size;
 381                 if(entry_alignment > align_all) {
 382                         if(entry_alignment % align_all != 0) {
 383                                 panic("Uneven alignments not supported yet");
 384                         }
 385                         align_all = entry_alignment;
 386                 }
 387         }
 388
 389         int misalign = offset % align_all;
 390         offset += misalign;
 391         set_type_alignment_bytes(ir_type, align_all);
 392         set_type_size_bytes(ir_type, offset);
 393         set_type_state(ir_type, layout_fixed);
 394
 395         return ir_type;
 396 }
 397
 398 static ir_type *create_union_type(compound_type_t *type)
 399 {
 400         declaration_t *declaration = type->declaration;
 401         symbol_t      *symbol      = declaration->symbol;
 402         ident         *id;
 403         if(symbol != NULL) {
 404                 id = unique_ident(symbol->string);
 405         } else {
 406                 id = unique_ident("__anonymous_union");
 407         }
 408         ir_type  *ir_type = new_type_union(id);
 409
 410         type->type.firm_type = ir_type;
 411
 412         int align_all = 1;
 413         int size      = 0;
 414         declaration_t *entry = declaration->context.declarations;
 415         for( ; entry != NULL; entry = entry->next) {
 416                 if(entry->namespace != NAMESPACE_NORMAL)
 417                         continue;
 418
 419                 ident       *ident         = new_id_from_str(entry->symbol->string);
 420                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 421
 422                 int entry_size      = get_type_size_bytes(entry_ir_type);
 423                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 424
 425                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 426                 add_union_member(ir_type, entity);
 427                 set_entity_offset(entity, 0);
 428                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 429                 entry->v.entity         = entity;
 430
 431                 if(entry_size > size) {
 432                         size = entry_size;
 433                 }
 434                 if(entry_alignment > align_all) {
 435                         if(entry_alignment % align_all != 0) {
 436                                 panic("Uneven alignments not supported yet");
 437                         }
 438                         align_all = entry_alignment;
 439                 }
 440         }
 441
 442         set_type_alignment_bytes(ir_type, align_all);
 443         set_type_size_bytes(ir_type, size);
 444         set_type_state(ir_type, layout_fixed);
 445
 446         return ir_type;
 447 }
 448
 449 static ir_type *get_ir_type(type_t *type)
 450 {
 451         assert(type != NULL);
 452
 453         type = skip_typeref(type);
 454
 455         if(type->firm_type != NULL) {
 456                 assert(type->firm_type != INVALID_TYPE);
 457                 return type->firm_type;
 458         }
 459
 460         ir_type *firm_type = NULL;
 461         switch(type->type) {
 462         case TYPE_ATOMIC:
 463                 firm_type = create_atomic_type((atomic_type_t*) type);
 464                 break;
 465         case TYPE_FUNCTION:
 466                 firm_type = create_method_type((function_type_t*) type);
 467                 break;
 468         case TYPE_POINTER:
 469                 firm_type = create_pointer_type((pointer_type_t*) type);
 470                 break;
 471         case TYPE_ARRAY:
 472                 firm_type = create_array_type((array_type_t*) type);
 473                 break;
 474         case TYPE_COMPOUND_STRUCT:
 475                 firm_type = create_struct_type((compound_type_t*) type);
 476                 break;
 477         case TYPE_COMPOUND_UNION:
 478                 firm_type = create_union_type((compound_type_t*) type);
 479                 break;
 480         case TYPE_ENUM:
 481                 firm_type = ir_type_int;
 482                 break;
 483         case TYPE_BUILTIN:
 484         case TYPE_TYPEOF:
 485         case TYPE_TYPEDEF:
 486         case TYPE_INVALID:
 487                 break;
 488         }
 489         if(firm_type == NULL)
 490                 panic("unknown type found");
 491
 492         type->firm_type = firm_type;
 493         return firm_type;
 494 }
 495
 496 static inline ir_mode *get_ir_mode(type_t *type)
 497 {
 498         ir_type *irtype = get_ir_type(type);
 499
 500         /* firm doesn't report a mode for arrays somehow... */
 501         if(is_Array_type(irtype)) {
 502                 return mode_P;
 503         }
 504
 505         ir_mode *mode = get_type_mode(irtype);
 506         assert(mode != NULL);
 507         return mode;
 508 }
 509
 510 static ir_entity* get_function_entity(declaration_t *declaration)
 511 {
 512         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 513                 return declaration->v.entity;
 514         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 515
 516         symbol_t *symbol = declaration->symbol;
 517         ident    *id     = new_id_from_str(symbol->string);
 518
 519         ir_type  *global_type    = get_glob_type();
 520         ir_type  *ir_type_method = get_ir_type(declaration->type);
 521         assert(is_Method_type(ir_type_method));
 522
 523         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 524         set_entity_ld_ident(entity, id);
 525         if(declaration->storage_class == STORAGE_CLASS_STATIC
 526                         || declaration->is_inline) {
 527                 set_entity_visibility(entity, visibility_local);
 528         } else if(declaration->init.statement != NULL) {
 529                 set_entity_visibility(entity, visibility_external_visible);
 530         } else {
 531                 set_entity_visibility(entity, visibility_external_allocated);
 532         }
 533
 534         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 535         declaration->v.entity         = entity;
 536
 537         return entity;
 538 }
 539
 540
 541
 542 static ir_node *expression_to_firm(const expression_t *expression);
 543 static ir_node *expression_to_modeb(const expression_t *expression);
 544
 545 static dbg_info *get_dbg_info(const source_position_t *pos)
 546 {
 547         return (dbg_info*) pos;
 548 }
 549
 550 static ir_node *const_to_firm(const const_t *cnst)
 551 {
 552         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 553         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 554
 555         tarval   *tv;
 556         if(mode_is_float(mode)) {
 557                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 558         } else {
 559                 tv = new_tarval_from_long(cnst->v.int_value, mode);
 560         }
 561
 562         return new_d_Const(dbgi, mode, tv);
 563 }
 564
 565 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 566 {
 567         assert(entity != NULL);
 568         union symconst_symbol sym;
 569         sym.entity_p = entity;
 570         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 571 }
 572
 573 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 574 {
 575         ir_type   *global_type = get_glob_type();
 576         ir_type   *type        = new_type_array(unique_ident("strtype"), 1,
 577                                                 ir_type_const_char);
 578
 579         ident     *id     = unique_ident("Lstr");
 580         ir_entity *entity = new_entity(global_type, id, type);
 581         set_entity_ld_ident(entity, id);
 582         set_entity_variability(entity, variability_constant);
 583
 584         ir_type    *elem_type = ir_type_const_char;
 585         ir_mode    *mode      = get_type_mode(elem_type);
 586
 587         const char *string = literal->value;
 588         size_t      slen   = strlen(string) + 1;
 589
 590         set_array_lower_bound_int(type, 0, 0);
 591         set_array_upper_bound_int(type, 0, slen);
 592         set_type_size_bytes(type, slen);
 593         set_type_state(type, layout_fixed);
 594
 595         tarval **tvs = xmalloc(slen * sizeof(tvs[0]));
 596         for(size_t i = 0; i < slen; ++i) {
 597                 tvs[i] = new_tarval_from_long(string[i], mode);
 598         }
 599
 600         set_array_entity_values(entity, tvs, slen);
 601         free(tvs);
 602
 603         dbg_info *dbgi = get_dbg_info(&literal->expression.source_position);
 604
 605         return create_symconst(dbgi, entity);
 606 }
 607
 608 static ir_node *load_from_expression_addr(type_t *type, ir_node *addr,
 609                                           dbg_info *dbgi)
 610 {
 611         ir_mode *mode     = get_ir_mode(type);
 612         ir_node *memory   = get_store();
 613         ir_node *load     = new_d_Load(dbgi, memory, addr, mode);
 614         ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 615         ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
 616         set_store(load_mem);
 617
 618         return load_res;
 619 }
 620
 621 static ir_node *deref_address(type_t *const type, ir_node *const addr,
 622                               dbg_info *const dbgi)
 623 {
 624         switch (type->type) {
 625                 case TYPE_ARRAY:
 626                 case TYPE_COMPOUND_STRUCT:
 627                 case TYPE_COMPOUND_UNION:
 628                         return addr;
 629
 630                 default:
 631                         return load_from_expression_addr(type, addr, dbgi);
 632         }
 633 }
 634
 635 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 636 {
 637         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 638         declaration_t *declaration = ref->declaration;
 639         type_t        *type        = skip_typeref(declaration->type);
 640
 641         switch((declaration_type_t) declaration->declaration_type) {
 642         case DECLARATION_TYPE_UNKNOWN:
 643                 break;
 644         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 645                 ir_mode *mode = get_ir_mode(type);
 646                 return get_value(declaration->v.value_number, mode);
 647         }
 648         case DECLARATION_TYPE_FUNCTION: {
 649                 return create_symconst(dbgi, declaration->v.entity);
 650         }
 651         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 652                 ir_entity *entity   = declaration->v.entity;
 653                 ir_node   *symconst = create_symconst(dbgi, entity);
 654
 655                 if(type->type == TYPE_ARRAY) {
 656                         return symconst;
 657                 } else {
 658                         return load_from_expression_addr(type, symconst, dbgi);
 659                 }
 660         }
 661         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 662                 ir_entity *entity = declaration->v.entity;
 663                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 664                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 665                 return deref_address(type, sel, dbgi);
 666         }
 667
 668         case DECLARATION_TYPE_COMPOUND_MEMBER:
 669         case DECLARATION_TYPE_LABEL_BLOCK:
 670                 panic("not implemented reference type");
 671         }
 672
 673         panic("reference to declaration with unknown type found");
 674 }
 675
 676 static ir_node *reference_addr(const reference_expression_t *ref)
 677 {
 678         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 679         declaration_t *declaration = ref->declaration;
 680
 681         switch((declaration_type_t) declaration->declaration_type) {
 682         case DECLARATION_TYPE_UNKNOWN:
 683                 break;
 684         case DECLARATION_TYPE_LOCAL_VARIABLE:
 685                 panic("local variable without entity has no address");
 686         case DECLARATION_TYPE_FUNCTION: {
 687                 return create_symconst(dbgi, declaration->v.entity);
 688         }
 689         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 690                 ir_entity *entity   = declaration->v.entity;
 691                 ir_node   *symconst = create_symconst(dbgi, entity);
 692                 return symconst;
 693         }
 694         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 695                 ir_entity *entity = declaration->v.entity;
 696                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 697                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 698
 699                 return sel;
 700         }
 701         case DECLARATION_TYPE_COMPOUND_MEMBER:
 702         case DECLARATION_TYPE_LABEL_BLOCK:
 703                 panic("not implemented reference type");
 704         }
 705
 706         panic("reference to declaration with unknown type found");
 707 }
 708
 709 static ir_node *call_expression_to_firm(const call_expression_t *call)
 710 {
 711         assert(get_cur_block() != NULL);
 712
 713         expression_t  *function = call->function;
 714         ir_node       *callee   = expression_to_firm(function);
 715
 716         assert(function->datatype->type == TYPE_FUNCTION);
 717         function_type_t *function_type = (function_type_t*) function->datatype;
 718
 719         int              n_parameters = 0;
 720         call_argument_t *argument     = call->arguments;
 721         for( ; argument != NULL; argument = argument->next) {
 722                 ++n_parameters;
 723         }
 724
 725         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 726         ir_type *new_method_type = NULL;
 727         if(function_type->variadic || function_type->unspecified_parameters) {
 728                 /* we need to construct a new method type matching the call
 729                  * arguments... */
 730                 int n_res       = get_method_n_ress(ir_method_type);
 731                 new_method_type = new_type_method(unique_ident("calltype"),
 732                                                   n_parameters, n_res);
 733                 set_method_calling_convention(new_method_type,
 734                                get_method_calling_convention(ir_method_type));
 735                 set_method_additional_properties(new_method_type,
 736                                get_method_additional_properties(ir_method_type));
 737
 738                 for(int i = 0; i < n_res; ++i) {
 739                         set_method_res_type(new_method_type, i,
 740                                             get_method_res_type(ir_method_type, i));
 741                 }
 742         }
 743         ir_node *in[n_parameters];
 744
 745         argument = call->arguments;
 746         int n = 0;
 747         for( ; argument != NULL; argument = argument->next) {
 748                 expression_t *expression = argument->expression;
 749                 ir_node      *arg_node   = expression_to_firm(expression);
 750
 751                 in[n] = arg_node;
 752                 if(new_method_type != NULL) {
 753                         ir_type *irtype = get_ir_type(expression->datatype);
 754                         set_method_param_type(new_method_type, n, irtype);
 755                 }
 756
 757                 n++;
 758         }
 759         assert(n == n_parameters);
 760
 761         if(new_method_type != NULL)
 762                 ir_method_type = new_method_type;
 763
 764         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 765         ir_node  *store = get_store();
 766         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 767                                      ir_method_type);
 768         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 769         set_store(mem);
 770
 771         type_t  *result_type = function_type->result_type;
 772         ir_node *result      = NULL;
 773         if(result_type != type_void) {
 774                 ir_mode *mode    = get_ir_mode(result_type);
 775                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 776                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 777         }
 778
 779         return result;
 780 }
 781
 782 static ir_node *expression_to_addr(const expression_t *expression);
 783
 784 static void set_value_for_expression(const expression_t *expression,
 785                                      ir_node *value)
 786 {
 787         if(expression->type == EXPR_REFERENCE) {
 788                 reference_expression_t *ref = (reference_expression_t*) expression;
 789
 790                 declaration_t *declaration = ref->declaration;
 791                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 792                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 793                         set_value(declaration->v.value_number, value);
 794                         return;
 795                 }
 796         }
 797
 798         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 799         ir_node  *addr      = expression_to_addr(expression);
 800         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 801         ir_node  *memory    = get_store();
 802         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 803         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 804         set_store(store_mem);
 805 }
 806
 807 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 808 {
 809         ir_mode *value_mode = get_irn_mode(value);
 810
 811         if(value_mode == dest_mode)
 812                 return value;
 813
 814         if(dest_mode == mode_b) {
 815                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 816                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 817                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 818                 return proj;
 819         }
 820
 821         return new_d_Conv(dbgi, value, dest_mode);
 822 }
 823
 824 static ir_node *create_incdec(const unary_expression_t *expression)
 825 {
 826         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
 827         type_t       *type  = expression->expression.datatype;
 828         ir_mode      *mode  = get_ir_mode(type);
 829         expression_t *value = expression->value;
 830
 831         ir_node *value_node = expression_to_firm(value);
 832
 833         ir_node *offset;
 834         if(type->type == TYPE_POINTER) {
 835                 pointer_type_t *pointer_type = (pointer_type_t*) type;
 836                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
 837                 offset = new_Const_long(mode_Is, elem_size);
 838         } else {
 839                 assert(is_type_arithmetic(type));
 840                 offset = new_Const(mode, get_mode_one(mode));
 841         }
 842
 843         ir_node *new_value;
 844         switch(expression->type) {
 845         case UNEXPR_POSTFIX_INCREMENT: {
 846                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 847                 set_value_for_expression(value, new_value);
 848                 return value_node;
 849         }
 850         case UNEXPR_POSTFIX_DECREMENT: {
 851                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 852                 set_value_for_expression(value, new_value);
 853                 return value_node;
 854         }
 855         case UNEXPR_PREFIX_INCREMENT: {
 856                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 857                 set_value_for_expression(value, new_value);
 858                 return new_value;
 859         }
 860         case UNEXPR_PREFIX_DECREMENT: {
 861                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 862                 set_value_for_expression(value, new_value);
 863                 return new_value;
 864         }
 865         default:
 866                 panic("no incdec expr in create_incdec");
 867         }
 868
 869         return new_value;
 870 }
 871
 872 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 873 {
 874         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 875         type_t   *type = expression->expression.datatype;
 876         ir_mode  *mode = get_ir_mode(type);
 877
 878         if(expression->type == UNEXPR_TAKE_ADDRESS)
 879                 return expression_to_addr(expression->value);
 880
 881         const expression_t *value      = expression->value;
 882         ir_node            *value_node = expression_to_firm(value);
 883
 884         switch(expression->type) {
 885         case UNEXPR_NEGATE:
 886                 return new_d_Minus(dbgi, value_node, mode);
 887         case UNEXPR_PLUS:
 888                 return value_node;
 889         case UNEXPR_BITWISE_NEGATE:
 890                 return new_d_Not(dbgi, value_node, mode);
 891         case UNEXPR_NOT:
 892                 if(get_irn_mode(value_node) != mode_b) {
 893                         value_node = create_conv(dbgi, value_node, mode_b);
 894                 }
 895                 value_node = new_d_Not(dbgi, value_node, mode_b);
 896                 if(mode != mode_b) {
 897                         value_node = create_conv(dbgi, value_node, mode);
 898                 }
 899                 return value_node;
 900         case UNEXPR_DEREFERENCE:
 901                 return load_from_expression_addr(type, value_node, dbgi);
 902         case UNEXPR_POSTFIX_INCREMENT:
 903         case UNEXPR_POSTFIX_DECREMENT:
 904         case UNEXPR_PREFIX_INCREMENT:
 905         case UNEXPR_PREFIX_DECREMENT:
 906                 return create_incdec(expression);
 907         case UNEXPR_CAST:
 908                 return create_conv(dbgi, value_node, mode);
 909
 910         case UNEXPR_TAKE_ADDRESS:
 911         case UNEXPR_INVALID:
 912                 break;
 913         }
 914         panic("invalid UNEXPR type found");
 915 }
 916
 917 static long get_pnc(binary_expression_type_t type)
 918 {
 919         switch(type) {
 920         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 921         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 922         case BINEXPR_LESS:         return pn_Cmp_Lt;
 923         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 924         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 925         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 926         default:
 927                 break;
 928         }
 929         panic("trying to get pn_Cmp from non-comparison binexpr type");
 930 }
 931
 932 static ir_node *create_lazy_op(const binary_expression_t *expression)
 933 {
 934         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 935
 936         bool is_or = (expression->type == BINEXPR_LOGICAL_OR);
 937         assert(is_or || expression->type == BINEXPR_LOGICAL_AND);
 938
 939         ir_node  *val1       = expression_to_modeb(expression->left);
 940         ir_node  *cond       = new_d_Cond(dbgi, val1);
 941         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
 942         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
 943
 944         ir_node *fallthrough_block = new_immBlock();
 945
 946         /* the true case */
 947         ir_node *calc_val2_block = new_immBlock();
 948         if(is_or) {
 949                 add_immBlock_pred(calc_val2_block, false_proj);
 950         } else {
 951                 add_immBlock_pred(calc_val2_block, true_proj);
 952         }
 953
 954         mature_immBlock(calc_val2_block);
 955
 956         ir_node *val2 = expression_to_modeb(expression->right);
 957         if(get_cur_block() != NULL) {
 958                 ir_node *jmp = new_d_Jmp(dbgi);
 959                 add_immBlock_pred(fallthrough_block, jmp);
 960         }
 961
 962         /* fallthrough */
 963         ir_node *constb;
 964         if(is_or) {
 965                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_true());
 966                 add_immBlock_pred(fallthrough_block, true_proj);
 967         } else {
 968                 constb = new_d_Const(dbgi, mode_b, get_tarval_b_false());
 969                 add_immBlock_pred(fallthrough_block, false_proj);
 970         }
 971         mature_immBlock(fallthrough_block);
 972
 973         set_cur_block(fallthrough_block);
 974
 975         ir_node *in[2] = { val2, constb };
 976         ir_node *val   = new_d_Phi(dbgi, 2, in, mode_b);
 977
 978         return val;
 979 }
 980
 981 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
 982                                             ir_node *right, ir_mode *mode);
 983
 984 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
 985                                         create_arithmetic_func func)
 986 {
 987         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 988         ir_node  *left  = expression_to_firm(expression->left);
 989         ir_node  *right = expression_to_firm(expression->right);
 990         type_t   *type  = expression->right->datatype;
 991         /* be careful with the modes, because in asithmetic assign nodes only
 992          * the right operand has the mode of the arithmetic alread */
 993         ir_mode  *mode  = get_ir_mode(type);
 994         left            = create_conv(dbgi, left, mode);
 995         ir_node  *res   = func(dbgi, left, right, mode);
 996
 997         return res;
 998 }
 999
1000 static ir_node *create_arithmetic_assign_binop(
1001                 const binary_expression_t *expression, create_arithmetic_func func)
1002 {
1003         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1004         ir_node  *value = create_arithmetic_binop(expression, func);
1005         type_t   *type  = expression->expression.datatype;
1006         ir_mode  *mode  = get_ir_mode(type);
1007
1008         assert(type->type != TYPE_POINTER);
1009
1010         value = create_conv(dbgi, value, mode);
1011         set_value_for_expression(expression->left, value);
1012
1013         return value;
1014 }
1015
1016 static ir_node *create_add(const binary_expression_t *expression)
1017 {
1018         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1019         ir_node  *left  = expression_to_firm(expression->left);
1020         ir_node  *right = expression_to_firm(expression->right);
1021         type_t   *type  = expression->expression.datatype;
1022         ir_mode  *mode  = get_ir_mode(type);
1023
1024         expression_t *expr_left  = expression->left;
1025         expression_t *expr_right = expression->right;
1026         type_t       *type_left  = skip_typeref(expr_left->datatype);
1027         type_t       *type_right = skip_typeref(expr_right->datatype);
1028
1029         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1030                 return new_d_Add(dbgi, left, right, mode);
1031         }
1032
1033         ir_node        *pointer;
1034         ir_node        *integer;
1035         pointer_type_t *pointer_type;
1036         if(type_left->type == TYPE_POINTER) {
1037                 pointer      = left;
1038                 integer      = right;
1039                 pointer_type = (pointer_type_t*) type_left;
1040         } else {
1041                 assert(type_right->type == TYPE_POINTER);
1042                 pointer      = right;
1043                 integer      = left;
1044                 pointer_type = (pointer_type_t*) type_right;
1045         }
1046
1047         type_t   *points_to = pointer_type->points_to;
1048         unsigned  elem_size = get_type_size(points_to);
1049
1050         assert(elem_size >= 1);
1051         if(elem_size > 1) {
1052                 integer       = create_conv(dbgi, integer, mode_Is);
1053                 ir_node *cnst = new_Const_long(mode_Is, (int) elem_size);
1054                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
1055                 integer = mul;
1056         }
1057
1058         ir_node *res = new_d_Add(dbgi, pointer, integer, mode);
1059
1060         return res;
1061 }
1062
1063 static ir_node *create_sub(const binary_expression_t *expression)
1064 {
1065         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1066         ir_node  *left  = expression_to_firm(expression->left);
1067         ir_node  *right = expression_to_firm(expression->right);
1068         type_t   *type  = expression->expression.datatype;
1069         ir_mode  *mode  = get_ir_mode(type);
1070
1071         expression_t *expr_left  = expression->left;
1072         expression_t *expr_right = expression->right;
1073         type_t       *type_left  = skip_typeref(expr_left->datatype);
1074         type_t       *type_right = skip_typeref(expr_right->datatype);
1075
1076         if((is_type_arithmetic(type_left) && is_type_arithmetic(type_right))
1077                         || (type_left->type == TYPE_POINTER
1078                                 && type_right->type == TYPE_POINTER)) {
1079                 return new_d_Sub(dbgi, left, right, mode);
1080         }
1081
1082         assert(type_right->type == TYPE_POINTER);
1083         ir_node        *pointer      = left;
1084         ir_node        *integer      = right;
1085         pointer_type_t *pointer_type = (pointer_type_t*) type_right;
1086
1087         type_t   *points_to = pointer_type->points_to;
1088         unsigned  elem_size = get_type_size(points_to);
1089
1090         assert(elem_size >= 1);
1091         if(elem_size > 1) {
1092                 ir_node *cnst = new_Const_long(mode_Iu, elem_size);
1093                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Iu);
1094                 integer = mul;
1095         }
1096
1097         ir_node *res = new_d_Sub(dbgi, pointer, integer, mode);
1098
1099         return res;
1100 }
1101
1102 static ir_node *create_shift(const binary_expression_t *expression)
1103 {
1104         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1105         ir_node  *left  = expression_to_firm(expression->left);
1106         ir_node  *right = expression_to_firm(expression->right);
1107         type_t   *type  = expression->expression.datatype;
1108         ir_mode  *mode  = get_ir_mode(type);
1109
1110         /* firm always wants the shift count to be unsigned */
1111         right = create_conv(dbgi, right, mode_Iu);
1112
1113         ir_node *res;
1114
1115         switch(expression->type) {
1116         case BINEXPR_SHIFTLEFT:
1117                 res = new_d_Shl(dbgi, left, right, mode);
1118                 break;
1119         case BINEXPR_SHIFTRIGHT: {
1120                  expression_t *expr_left = expression->left;
1121                  type_t       *type_left = skip_typeref(expr_left->datatype);
1122
1123                  if(is_type_signed(type_left)) {
1124                         res = new_d_Shrs(dbgi, left, right, mode);
1125                  } else {
1126                          res = new_d_Shr(dbgi, left, right, mode);
1127                  }
1128                  break;
1129         }
1130         default:
1131                 panic("create shift op called for non-shift op");
1132         }
1133
1134         return res;
1135 }
1136
1137
1138 static ir_node *create_divmod(const binary_expression_t *expression)
1139 {
1140         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1141         ir_node  *left  = expression_to_firm(expression->left);
1142         ir_node  *right = expression_to_firm(expression->right);
1143         ir_node  *pin   = new_Pin(new_NoMem());
1144         type_t   *type  = expression->expression.datatype;
1145         ir_mode  *mode  = get_ir_mode(type);
1146         ir_node  *op;
1147         ir_node  *res;
1148
1149         switch (expression->type)  {
1150                 case BINEXPR_DIV:
1151                 case BINEXPR_DIV_ASSIGN:
1152                         if(mode_is_float(mode)) {
1153                                 op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1154                                 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1155                         } else {
1156                                 op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1157                                 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1158                         }
1159                         break;
1160
1161                 case BINEXPR_MOD:
1162                 case BINEXPR_MOD_ASSIGN:
1163                         assert(!mode_is_float(mode));
1164                         op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1165                         res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1166                         break;
1167
1168                 default: panic("unexpected binary expression type in create_divmod()");
1169         }
1170
1171         return res;
1172 }
1173
1174 static ir_node *create_arithmetic_assign_divmod(
1175                 const binary_expression_t *expression)
1176 {
1177         ir_node  *      value = create_divmod(expression);
1178         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1179         type_t   *const type  = expression->expression.datatype;
1180         ir_mode  *const mode  = get_ir_mode(type);
1181
1182         assert(type->type != TYPE_POINTER);
1183
1184         value = create_conv(dbgi, value, mode);
1185         set_value_for_expression(expression->left, value);
1186
1187         return value;
1188 }
1189
1190
1191 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1192 {
1193         binary_expression_type_t type = expression->type;
1194         switch(type) {
1195         case BINEXPR_EQUAL:
1196         case BINEXPR_NOTEQUAL:
1197         case BINEXPR_LESS:
1198         case BINEXPR_LESSEQUAL:
1199         case BINEXPR_GREATER:
1200         case BINEXPR_GREATEREQUAL: {
1201                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1202                 ir_node *left  = expression_to_firm(expression->left);
1203                 ir_node *right = expression_to_firm(expression->right);
1204                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1205                 long     pnc   = get_pnc(type);
1206                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1207                 return proj;
1208         }
1209         case BINEXPR_ASSIGN: {
1210                 ir_node *right = expression_to_firm(expression->right);
1211                 set_value_for_expression(expression->left, right);
1212                 return right;
1213         }
1214         case BINEXPR_ADD:
1215                 return create_add(expression);
1216         case BINEXPR_SUB:
1217                 return create_sub(expression);
1218         case BINEXPR_MUL:
1219                 return create_arithmetic_binop(expression, new_d_Mul);
1220         case BINEXPR_BITWISE_AND:
1221                 return create_arithmetic_binop(expression, new_d_And);
1222         case BINEXPR_BITWISE_OR:
1223                 return create_arithmetic_binop(expression, new_d_Or);
1224         case BINEXPR_BITWISE_XOR:
1225                 return create_arithmetic_binop(expression, new_d_Eor);
1226         case BINEXPR_SHIFTLEFT:
1227         case BINEXPR_SHIFTRIGHT:
1228                 return create_shift(expression);
1229         case BINEXPR_DIV:
1230         case BINEXPR_MOD:
1231                 return create_divmod(expression);
1232         case BINEXPR_LOGICAL_AND:
1233         case BINEXPR_LOGICAL_OR:
1234                 return create_lazy_op(expression);
1235         case BINEXPR_COMMA:
1236                 expression_to_firm(expression->left);
1237                 return expression_to_firm(expression->right);
1238         case BINEXPR_ADD_ASSIGN:
1239                 return create_arithmetic_assign_binop(expression, new_d_Add);
1240         case BINEXPR_SUB_ASSIGN:
1241                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1242         case BINEXPR_MUL_ASSIGN:
1243                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1244         case BINEXPR_DIV_ASSIGN:
1245                 return create_arithmetic_assign_divmod(expression);
1246         case BINEXPR_BITWISE_AND_ASSIGN:
1247                 return create_arithmetic_assign_binop(expression, new_d_And);
1248         case BINEXPR_BITWISE_OR_ASSIGN:
1249                 return create_arithmetic_assign_binop(expression, new_d_Or);
1250         case BINEXPR_BITWISE_XOR_ASSIGN:
1251                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1252         case BINEXPR_SHIFTLEFT_ASSIGN:
1253                 return create_arithmetic_assign_binop(expression, new_d_Shl);
1254         case BINEXPR_SHIFTRIGHT_ASSIGN:
1255                 return create_arithmetic_assign_binop(expression, new_d_Shr);
1256         default:
1257                 panic("TODO binexpr type");
1258         }
1259 }
1260
1261 static ir_node *array_access_addr(const array_access_expression_t *expression)
1262 {
1263         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1264
1265         ir_node *base_addr = expression_to_firm(expression->array_ref);
1266         ir_node *offset    = expression_to_firm(expression->index);
1267         offset             = create_conv(dbgi, offset, mode_Iu);
1268
1269         unsigned elem_size       = get_type_size(expression->expression.datatype);
1270         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1271         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1272                                              mode_Iu);
1273         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1274
1275         return result;
1276 }
1277
1278 static ir_node *array_access_to_firm(
1279                 const array_access_expression_t *expression)
1280 {
1281         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1282         ir_node  *addr = array_access_addr(expression);
1283         type_t   *type = expression->expression.datatype;
1284         return deref_address(type, addr, dbgi);
1285 }
1286
1287 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1288 {
1289         type_t *type = expression->type;
1290         if(type == NULL) {
1291                 type = expression->size_expression->datatype;
1292                 assert(type != NULL);
1293         }
1294
1295         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1296         unsigned  size      = get_type_size(type);
1297         ir_node  *size_node = new_Const_long(mode, size);
1298
1299         return size_node;
1300 }
1301
1302 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1303 {
1304         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1305
1306         ir_node *condition  = expression_to_modeb(expression->condition);
1307         ir_node *cond       = new_d_Cond(dbgi, condition);
1308         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1309         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1310
1311         /* create the true block */
1312         ir_node *true_block = new_immBlock();
1313         add_immBlock_pred(true_block, true_proj);
1314         mature_immBlock(true_block);
1315
1316         ir_node *true_val = expression_to_firm(expression->true_expression);
1317         ir_node *true_jmp = new_Jmp();
1318
1319         /* create the false block */
1320         ir_node *false_block = new_immBlock();
1321         add_immBlock_pred(false_block, false_proj);
1322         mature_immBlock(false_block);
1323
1324         ir_node *false_val = expression_to_firm(expression->false_expression);
1325         ir_node *false_jmp = new_Jmp();
1326
1327         /* create the common block */
1328         ir_node *common_block = new_immBlock();
1329         add_immBlock_pred(common_block, true_jmp);
1330         add_immBlock_pred(common_block, false_jmp);
1331         mature_immBlock(common_block);
1332
1333         ir_node *in[2] = { true_val, false_val };
1334         ir_mode *mode  = get_irn_mode(true_val);
1335         assert(get_irn_mode(false_val) == mode);
1336         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1337
1338         return val;
1339 }
1340
1341 static ir_node *select_addr(const select_expression_t *expression)
1342 {
1343         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1344
1345         ir_node *compound_addr = expression_to_firm(expression->compound);
1346
1347         declaration_t *entry = expression->compound_entry;
1348         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1349         ir_entity     *entity = entry->v.entity;
1350
1351         assert(entity != NULL);
1352
1353         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1354
1355         return sel;
1356 }
1357
1358 static ir_node *select_to_firm(const select_expression_t *expression)
1359 {
1360         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1361         ir_node  *addr = select_addr(expression);
1362         type_t   *type = expression->expression.datatype;
1363
1364         return load_from_expression_addr(type, addr, dbgi);
1365 }
1366
1367 static ir_node *dereference_addr(const unary_expression_t *const expression)
1368 {
1369         assert(expression->type == UNEXPR_DEREFERENCE);
1370         return expression_to_firm(expression->value);
1371 }
1372
1373 static ir_node *expression_to_addr(const expression_t *expression)
1374 {
1375         switch(expression->type) {
1376         case EXPR_REFERENCE:
1377                 return reference_addr((const reference_expression_t*) expression);
1378         case EXPR_ARRAY_ACCESS:
1379                 return array_access_addr((const array_access_expression_t*) expression);
1380         case EXPR_SELECT:
1381                 return select_addr((const select_expression_t*) expression);
1382         case EXPR_UNARY: {
1383                 const unary_expression_t *const unary_expr =
1384                         (const unary_expression_t*)expression;
1385                 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1386                         return dereference_addr(unary_expr);
1387                 }
1388                 break;
1389         }
1390         default:
1391                 break;
1392         }
1393         panic("trying to get address of non-lvalue");
1394 }
1395
1396 static ir_node *_expression_to_firm(const expression_t *expression)
1397 {
1398         switch(expression->type) {
1399         case EXPR_CONST:
1400                 return const_to_firm((const const_t*) expression);
1401         case EXPR_STRING_LITERAL:
1402                 return string_literal_to_firm((const string_literal_t*) expression);
1403         case EXPR_REFERENCE:
1404                 return reference_expression_to_firm(
1405                                 (const reference_expression_t*) expression);
1406         case EXPR_CALL:
1407                 return call_expression_to_firm((const call_expression_t*) expression);
1408         case EXPR_UNARY:
1409                 return unary_expression_to_firm((const unary_expression_t*) expression);
1410         case EXPR_BINARY:
1411                 return binary_expression_to_firm(
1412                                 (const binary_expression_t*) expression);
1413         case EXPR_ARRAY_ACCESS:
1414                 return array_access_to_firm(
1415                                 (const array_access_expression_t*) expression);
1416         case EXPR_SIZEOF:
1417                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1418         case EXPR_CONDITIONAL:
1419                 return conditional_to_firm((const conditional_expression_t*)expression);
1420         case EXPR_SELECT:
1421                 return select_to_firm((const select_expression_t*) expression);
1422         case EXPR_FUNCTION:
1423         case EXPR_OFFSETOF:
1424         case EXPR_PRETTY_FUNCTION:
1425         case EXPR_VA_ARG:
1426         case EXPR_STATEMENT:
1427         case EXPR_BUILTIN_SYMBOL:
1428                 panic("unimplemented expression found");
1429
1430         case EXPR_UNKNOWN:
1431         case EXPR_INVALID:
1432                 break;
1433         }
1434         panic("invalid expression found");
1435 }
1436
1437 static ir_node *expression_to_firm(const expression_t *expression)
1438 {
1439         ir_node *res = _expression_to_firm(expression);
1440
1441         if(res != NULL && get_irn_mode(res) == mode_b) {
1442                 ir_mode *mode = get_ir_mode(expression->datatype);
1443                 res           = create_conv(NULL, res, mode);
1444         }
1445
1446         return res;
1447 }
1448
1449 static ir_node *expression_to_modeb(const expression_t *expression)
1450 {
1451         ir_node *res = _expression_to_firm(expression);
1452         res          = create_conv(NULL, res, mode_b);
1453
1454         return res;
1455 }
1456
1457 static void statement_to_firm(statement_t *statement);
1458
1459 static void return_statement_to_firm(return_statement_t *statement)
1460 {
1461         if(get_cur_block() == NULL)
1462                 return;
1463
1464         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1465         ir_node  *ret;
1466
1467         if(statement->return_value != NULL) {
1468                 ir_node *retval = expression_to_firm(statement->return_value);
1469                 ir_node *in[1];
1470
1471                 in[0] = retval;
1472                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1473         } else {
1474                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1475         }
1476         ir_node *end_block = get_irg_end_block(current_ir_graph);
1477         add_immBlock_pred(end_block, ret);
1478
1479         set_cur_block(NULL);
1480 }
1481
1482 static void compound_statement_to_firm(compound_statement_t *compound)
1483 {
1484         statement_t *statement = compound->statements;
1485         for( ; statement != NULL; statement = statement->next) {
1486                 //context2firm(&statement->context);
1487                 statement_to_firm(statement);
1488         }
1489 }
1490
1491 static void expression_statement_to_firm(expression_statement_t *statement)
1492 {
1493         if(get_cur_block() == NULL)
1494                 return;
1495
1496         expression_to_firm(statement->expression);
1497 }
1498
1499 static void if_statement_to_firm(if_statement_t *statement)
1500 {
1501         dbg_info *dbgi      = get_dbg_info(&statement->statement.source_position);
1502         ir_node  *condition = expression_to_modeb(statement->condition);
1503
1504         /* make sure we have a mode_b condition */
1505         ir_node *cond       = new_d_Cond(dbgi, condition);
1506         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1507         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1508
1509         ir_node *fallthrough_block = new_immBlock();
1510
1511         /* the true (blocks) */
1512         ir_node *true_block = new_immBlock();
1513         add_immBlock_pred(true_block, true_proj);
1514         mature_immBlock(true_block);
1515
1516         statement_to_firm(statement->true_statement);
1517         if(get_cur_block() != NULL) {
1518                 ir_node *jmp = new_Jmp();
1519                 add_immBlock_pred(fallthrough_block, jmp);
1520         }
1521
1522         /* the false (blocks) */
1523         if(statement->false_statement != NULL) {
1524                 ir_node *false_block = new_immBlock();
1525                 add_immBlock_pred(false_block, false_proj);
1526                 mature_immBlock(false_block);
1527
1528                 statement_to_firm(statement->false_statement);
1529                 if(get_cur_block() != NULL) {
1530                         ir_node *jmp = new_Jmp();
1531                         add_immBlock_pred(fallthrough_block, jmp);
1532                 }
1533         } else {
1534                 add_immBlock_pred(fallthrough_block, false_proj);
1535         }
1536         mature_immBlock(fallthrough_block);
1537
1538         set_cur_block(fallthrough_block);
1539 }
1540
1541 static void while_statement_to_firm(while_statement_t *statement)
1542 {
1543         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1544
1545         ir_node *jmp = NULL;
1546         if(get_cur_block() != NULL) {
1547                 jmp = new_Jmp();
1548         }
1549
1550         /* create the header block */
1551         ir_node *header_block = new_immBlock();
1552         if(jmp != NULL) {
1553                 add_immBlock_pred(header_block, jmp);
1554         }
1555
1556         /* create the condition */
1557         ir_node *condition  = expression_to_modeb(statement->condition);
1558         ir_node *cond       = new_d_Cond(dbgi, condition);
1559         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1560         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1561
1562         /* the false block */
1563         ir_node *false_block = new_immBlock();
1564         add_immBlock_pred(false_block, false_proj);
1565
1566         /* the loop body */
1567         ir_node *body_block = new_immBlock();
1568         add_immBlock_pred(body_block, true_proj);
1569         mature_immBlock(body_block);
1570
1571         ir_node *old_continue_label = continue_label;
1572         ir_node *old_break_label    = break_label;
1573         continue_label              = header_block;
1574         break_label                 = false_block;
1575
1576         statement_to_firm(statement->body);
1577
1578         assert(continue_label == header_block);
1579         assert(break_label    == false_block);
1580         continue_label = old_continue_label;
1581         break_label    = old_break_label;
1582
1583         if(get_cur_block() != NULL) {
1584                 ir_node *jmp = new_Jmp();
1585                 add_immBlock_pred(header_block, jmp);
1586         }
1587
1588         mature_immBlock(header_block);
1589         mature_immBlock(false_block);
1590
1591         set_cur_block(false_block);
1592 }
1593
1594 static void do_while_statement_to_firm(do_while_statement_t *statement)
1595 {
1596         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1597
1598         ir_node *jmp = NULL;
1599         if(get_cur_block() != NULL) {
1600                 jmp = new_Jmp();
1601         }
1602
1603         /* create the header block */
1604         ir_node *header_block = new_immBlock();
1605
1606         /* the false block */
1607         ir_node *false_block = new_immBlock();
1608
1609         /* the loop body */
1610         ir_node *body_block = new_immBlock();
1611         if(jmp != NULL) {
1612                 add_immBlock_pred(body_block, jmp);
1613         }
1614
1615         ir_node *old_continue_label = continue_label;
1616         ir_node *old_break_label    = break_label;
1617         continue_label              = header_block;
1618         break_label                 = false_block;
1619
1620         statement_to_firm(statement->body);
1621
1622         assert(continue_label == header_block);
1623         assert(break_label    == false_block);
1624         continue_label = old_continue_label;
1625         break_label    = old_break_label;
1626
1627         if(get_cur_block() == NULL) {
1628                 mature_immBlock(header_block);
1629                 mature_immBlock(body_block);
1630                 mature_immBlock(false_block);
1631                 return;
1632         }
1633
1634         ir_node *body_jmp = new_Jmp();
1635         add_immBlock_pred(header_block, body_jmp);
1636         mature_immBlock(header_block);
1637
1638         /* create the condition */
1639         set_cur_block(header_block);
1640         ir_node *condition  = expression_to_modeb(statement->condition);
1641         ir_node *cond       = new_d_Cond(dbgi, condition);
1642         ir_node *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1643         ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1644
1645         add_immBlock_pred(body_block, true_proj);
1646         mature_immBlock(body_block);
1647
1648         add_immBlock_pred(false_block, false_proj);
1649         mature_immBlock(false_block);
1650
1651         set_cur_block(false_block);
1652 }
1653
1654 static void for_statement_to_firm(for_statement_t *statement)
1655 {
1656         dbg_info *const dbgi = get_dbg_info(&statement->statement.source_position);
1657
1658         ir_node *jmp = NULL;
1659         if (get_cur_block() != NULL) {
1660                 if(statement->initialisation != NULL) {
1661                         expression_to_firm(statement->initialisation);
1662                 }
1663                 jmp = new_Jmp();
1664         }
1665
1666         /* create the step block */
1667         ir_node *const step_block = new_immBlock();
1668         if (statement->step != NULL) {
1669                 expression_to_firm(statement->step);
1670         }
1671         ir_node *const step_jmp   = new_Jmp();
1672
1673         /* create the header block */
1674         ir_node *const header_block = new_immBlock();
1675         if (jmp != NULL) {
1676                 add_immBlock_pred(header_block, jmp);
1677         }
1678         add_immBlock_pred(header_block, step_jmp);
1679
1680         /* create the condition */
1681         ir_node *true_proj;
1682         ir_node *false_proj;
1683         if (statement->condition != NULL) {
1684                 ir_node *const condition  = expression_to_modeb(statement->condition);
1685                 ir_node *const cond       = new_d_Cond(dbgi, condition);
1686                 true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1687                 false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1688         } else {
1689                 keep_alive(header_block);
1690                 true_proj  = new_Jmp();
1691                 false_proj = NULL;
1692         }
1693
1694         /* the false block */
1695         ir_node *const false_block = new_immBlock();
1696         if (false_proj != NULL) {
1697                 add_immBlock_pred(false_block, false_proj);
1698         }
1699
1700         /* the loop body */
1701         ir_node *const body_block = new_immBlock();
1702         add_immBlock_pred(body_block, true_proj);
1703         mature_immBlock(body_block);
1704
1705         ir_node *const old_continue_label = continue_label;
1706         ir_node *const old_break_label    = break_label;
1707         continue_label = step_block;
1708         break_label    = false_block;
1709
1710         statement_to_firm(statement->body);
1711
1712         assert(continue_label == step_block);
1713         assert(break_label    == false_block);
1714         continue_label = old_continue_label;
1715         break_label    = old_break_label;
1716
1717         if (get_cur_block() != NULL) {
1718                 ir_node *const jmp = new_Jmp();
1719                 add_immBlock_pred(step_block, jmp);
1720         }
1721
1722         mature_immBlock(step_block);
1723         mature_immBlock(header_block);
1724         mature_immBlock(false_block);
1725
1726         set_cur_block(false_block);
1727 }
1728
1729 static void create_declaration_entity(declaration_t *declaration,
1730                                       declaration_type_t declaration_type,
1731                                       ir_type *parent_type)
1732 {
1733         ident     *id     = new_id_from_str(declaration->symbol->string);
1734         ir_type   *irtype = get_ir_type(declaration->type);
1735         ir_entity *entity = new_entity(parent_type, id, irtype);
1736         set_entity_ld_ident(entity, id);
1737
1738         declaration->declaration_type = declaration_type;
1739         declaration->v.entity         = entity;
1740         set_entity_variability(entity, variability_uninitialized);
1741         /* TODO: visibility? */
1742 }
1743
1744 static void create_initializer(declaration_t *declaration)
1745 {
1746         initializer_t *initializer = declaration->init.initializer;
1747         if(initializer == NULL)
1748                 return;
1749
1750         if(initializer->type == INITIALIZER_VALUE) {
1751                 assert(initializer->designator == NULL);
1752                 assert(initializer->next == NULL);
1753                 ir_node *init_node = expression_to_firm(initializer->v.value);
1754
1755                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1756                         set_value(declaration->v.value_number, init_node);
1757                 } else {
1758                         ir_entity *entity = declaration->v.entity;
1759
1760                         set_entity_variability(entity, variability_initialized);
1761                         set_atomic_ent_value(entity, init_node);
1762                 }
1763         } else {
1764                 assert(initializer->type == INITIALIZER_LIST);
1765                 panic("list initializer not supported yet");
1766         }
1767 }
1768
1769 static void create_local_variable(declaration_t *declaration)
1770 {
1771         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
1772
1773         bool needs_entity = declaration->address_taken;
1774         type_t *type = skip_typeref(declaration->type);
1775
1776         if(type->type == TYPE_ARRAY
1777                         || type->type == TYPE_COMPOUND_STRUCT
1778                         || type->type == TYPE_COMPOUND_UNION) {
1779                 needs_entity = true;
1780         }
1781
1782         if(needs_entity) {
1783                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
1784                 create_declaration_entity(declaration,
1785                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
1786                                           frame_type);
1787         } else {
1788                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1789                 declaration->v.value_number   = next_value_number_function;
1790                 ++next_value_number_function;
1791         }
1792
1793         create_initializer(declaration);
1794 }
1795
1796 static void declaration_statement_to_firm(declaration_statement_t *statement)
1797 {
1798         declaration_t *declaration = statement->declarations_begin;
1799         declaration_t *end         = statement->declarations_end->next;
1800         for( ; declaration != end; declaration = declaration->next) {
1801                 type_t *type = declaration->type;
1802
1803                 switch(declaration->storage_class) {
1804                 case STORAGE_CLASS_TYPEDEF:
1805                         continue;
1806                 case STORAGE_CLASS_STATIC:
1807                         panic("static local vars not implemented yet");
1808                 case STORAGE_CLASS_ENUM_ENTRY:
1809                         panic("enum entry declaration in local block found");
1810                 case STORAGE_CLASS_EXTERN:
1811                         panic("extern declaration in local block found");
1812                 case STORAGE_CLASS_NONE:
1813                 case STORAGE_CLASS_AUTO:
1814                 case STORAGE_CLASS_REGISTER:
1815                         if(type->type == TYPE_FUNCTION) {
1816                                 panic("nested functions not supported yet");
1817                         } else {
1818                                 create_local_variable(declaration);
1819                         }
1820                         continue;
1821                 }
1822                 panic("invalid storage class found");
1823         }
1824 }
1825
1826 static void create_jump_statement(const statement_t *statement,
1827                                   ir_node *target_block)
1828 {
1829         if(get_cur_block() == NULL)
1830                 return;
1831
1832         dbg_info *dbgi = get_dbg_info(&statement->source_position);
1833         ir_node  *jump = new_d_Jmp(dbgi);
1834         add_immBlock_pred(target_block, jump);
1835
1836         set_cur_block(NULL);
1837 }
1838
1839 static void switch_statement_to_firm(const switch_statement_t *statement)
1840 {
1841         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1842
1843         ir_node *expression  = expression_to_firm(statement->expression);
1844         ir_node *cond        = new_d_Cond(dbgi, expression);
1845         ir_node *break_block = new_immBlock();
1846
1847         set_cur_block(NULL);
1848
1849         ir_node *const old_switch_cond       = current_switch_cond;
1850         ir_node *const old_break_label       = break_label;
1851         const bool     old_saw_default_label = saw_default_label;
1852         current_switch_cond                  = cond;
1853         break_label                          = break_block;
1854
1855         statement_to_firm(statement->body);
1856
1857         if(get_cur_block() != NULL) {
1858                 ir_node *jmp = new_Jmp();
1859                 add_immBlock_pred(break_block, jmp);
1860         }
1861
1862         if (!saw_default_label) {
1863                 set_cur_block(get_nodes_block(cond));
1864                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
1865                                                         MAGIC_DEFAULT_PN_NUMBER);
1866                 add_immBlock_pred(break_block, proj);
1867         }
1868
1869         assert(current_switch_cond == cond);
1870         assert(break_label         == break_block);
1871         current_switch_cond = old_switch_cond;
1872         break_label         = old_break_label;
1873         saw_default_label   = old_saw_default_label;
1874
1875         mature_immBlock(break_block);
1876         set_cur_block(break_block);
1877 }
1878
1879 static long fold_constant(const expression_t *expression)
1880 {
1881         ir_graph *old_current_ir_graph = current_ir_graph;
1882         current_ir_graph = get_const_code_irg();
1883
1884         ir_node *cnst = expression_to_firm(expression);
1885         if(!is_Const(cnst)) {
1886                 panic("couldn't fold constantl");
1887         }
1888         tarval *tv = get_Const_tarval(cnst);
1889         if(!tarval_is_long(tv)) {
1890                 panic("folded constant not an integer");
1891         }
1892
1893         long res = get_tarval_long(tv);
1894
1895         current_ir_graph = old_current_ir_graph;
1896         return res;
1897 }
1898
1899 static void case_label_to_firm(const case_label_statement_t *statement)
1900 {
1901         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1902
1903         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
1904
1905         /* let's create a node and hope firm constant folding creates a Const
1906          * node... */
1907         ir_node *proj;
1908         set_cur_block(get_nodes_block(current_switch_cond));
1909         if(statement->expression) {
1910                 long pn = fold_constant(statement->expression);
1911                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
1912                         /* oops someone detected our cheating... */
1913                         panic("magic default pn used");
1914                 }
1915                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
1916         } else {
1917                 saw_default_label = true;
1918                 proj = new_d_defaultProj(dbgi, current_switch_cond,
1919                                          MAGIC_DEFAULT_PN_NUMBER);
1920         }
1921
1922         ir_node *block = new_immBlock();
1923         if (fallthrough != NULL) {
1924                 add_immBlock_pred(block, fallthrough);
1925         }
1926         add_immBlock_pred(block, proj);
1927         mature_immBlock(block);
1928 }
1929
1930 static ir_node *get_label_block(declaration_t *label)
1931 {
1932         assert(label->namespace == NAMESPACE_LABEL);
1933
1934         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
1935                 return label->v.block;
1936         }
1937         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
1938
1939         ir_node *old_cur_block = get_cur_block();
1940         ir_node *block         = new_immBlock();
1941         set_cur_block(old_cur_block);
1942
1943         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
1944         label->v.block          = block;
1945
1946         ARR_APP1(ir_node *, imature_blocks, block);
1947
1948         return block;
1949 }
1950
1951 static void label_to_firm(const label_statement_t *statement)
1952 {
1953         ir_node *block = get_label_block(statement->label);
1954
1955         if(get_cur_block() != NULL) {
1956                 ir_node *jmp = new_Jmp();
1957                 add_immBlock_pred(block, jmp);
1958         }
1959
1960         set_cur_block(block);
1961         keep_alive(block);
1962
1963         statement_to_firm(statement->label_statement);
1964 }
1965
1966 static void goto_to_firm(const goto_statement_t *statement)
1967 {
1968         if(get_cur_block() == NULL)
1969                 return;
1970
1971         ir_node *block = get_label_block(statement->label);
1972         ir_node *jmp   = new_Jmp();
1973         add_immBlock_pred(block, jmp);
1974
1975         set_cur_block(NULL);
1976 }
1977
1978 static void statement_to_firm(statement_t *statement)
1979 {
1980         switch(statement->type) {
1981         case STATEMENT_COMPOUND:
1982                 compound_statement_to_firm((compound_statement_t*) statement);
1983                 return;
1984         case STATEMENT_RETURN:
1985                 return_statement_to_firm((return_statement_t*) statement);
1986                 return;
1987         case STATEMENT_EXPRESSION:
1988                 expression_statement_to_firm((expression_statement_t*) statement);
1989                 return;
1990         case STATEMENT_IF:
1991                 if_statement_to_firm((if_statement_t*) statement);
1992                 return;
1993         case STATEMENT_WHILE:
1994                 while_statement_to_firm((while_statement_t*) statement);
1995                 return;
1996         case STATEMENT_DO_WHILE:
1997                 do_while_statement_to_firm((do_while_statement_t*) statement);
1998                 return;
1999         case STATEMENT_DECLARATION:
2000                 declaration_statement_to_firm((declaration_statement_t*) statement);
2001                 return;
2002         case STATEMENT_BREAK:
2003                 create_jump_statement(statement, break_label);
2004                 return;
2005         case STATEMENT_CONTINUE:
2006                 create_jump_statement(statement, continue_label);
2007                 return;
2008         case STATEMENT_SWITCH:
2009                 switch_statement_to_firm((switch_statement_t*) statement);
2010                 return;
2011         case STATEMENT_CASE_LABEL:
2012                 case_label_to_firm((case_label_statement_t*) statement);
2013                 return;
2014         case STATEMENT_FOR:
2015                 for_statement_to_firm((for_statement_t*) statement);
2016                 return;
2017         case STATEMENT_LABEL:
2018                 label_to_firm((label_statement_t*) statement);
2019                 return;
2020         case STATEMENT_GOTO:
2021                 goto_to_firm((goto_statement_t*) statement);
2022                 return;
2023         default:
2024                 break;
2025         }
2026         panic("Statement not implemented\n");
2027 }
2028
2029 static int get_function_n_local_vars(declaration_t *declaration)
2030 {
2031         (void) declaration;
2032         /* TODO */
2033         return 30;
2034 }
2035
2036 static void initialize_function_parameters(declaration_t *declaration)
2037 {
2038         ir_graph *irg         = current_ir_graph;
2039         ir_node  *args        = get_irg_args(irg);
2040         ir_node  *start_block = get_irg_start_block(irg);
2041
2042         int            n         = 0;
2043         declaration_t *parameter = declaration->context.declarations;
2044         for( ; parameter != NULL; parameter = parameter->next) {
2045                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
2046                 type_t *type = parameter->type;
2047
2048                 bool needs_entity = parameter->address_taken;
2049                 if(type->type == TYPE_COMPOUND_STRUCT
2050                                 || type->type == TYPE_COMPOUND_UNION) {
2051                         needs_entity = true;
2052                 }
2053
2054                 if(needs_entity) {
2055                         panic("entities for function parameters not implemented yet");
2056                 }
2057
2058                 ir_mode *mode = get_ir_mode(parameter->type);
2059                 long     pn   = n;
2060                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2061                 ++n;
2062
2063                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2064                 parameter->v.value_number   = next_value_number_function;
2065                 ++next_value_number_function;
2066
2067                 set_value(parameter->v.value_number, proj);
2068         }
2069 }
2070
2071 static void create_function(declaration_t *declaration)
2072 {
2073         ir_entity *entity = get_function_entity(declaration);
2074
2075         if(declaration->init.statement == NULL)
2076                 return;
2077
2078         assert(imature_blocks == NULL);
2079         imature_blocks = NEW_ARR_F(ir_node*, 0);
2080
2081         int       n_local_vars = get_function_n_local_vars(declaration);
2082         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
2083         ir_node  *first_block  = get_cur_block();
2084
2085         next_value_number_function = 0;
2086         initialize_function_parameters(declaration);
2087
2088         statement_to_firm(declaration->init.statement);
2089
2090         ir_node *end_block = get_irg_end_block(irg);
2091
2092         /* do we have a return statement yet? */
2093         if(get_cur_block() != NULL) {
2094                 assert(declaration->type->type == TYPE_FUNCTION);
2095                 const function_type_t* const func_type
2096                         = (const function_type_t*) declaration->type;
2097                 ir_node *ret;
2098                 if (func_type->result_type == type_void) {
2099                         ret = new_Return(get_store(), 0, NULL);
2100                 } else {
2101                         ir_mode *const mode = get_ir_mode(func_type->result_type);
2102                         ir_node *      in[1];
2103                         // §5.1.2.2.3 main implicitly returns 0
2104                         if (strcmp(declaration->symbol->string, "main") == 0) {
2105                                 in[0] = new_Const(mode, get_mode_null(mode));
2106                         } else {
2107                                 in[0] = new_Unknown(mode);
2108                         }
2109                         ret = new_Return(get_store(), 1, in);
2110                 }
2111                 add_immBlock_pred(end_block, ret);
2112         }
2113
2114         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2115                 mature_immBlock(imature_blocks[i]);
2116         }
2117         DEL_ARR_F(imature_blocks);
2118         imature_blocks = NULL;
2119
2120         mature_immBlock(first_block);
2121         mature_immBlock(end_block);
2122
2123         irg_finalize_cons(irg);
2124
2125         /* finalize the frame type */
2126         ir_type *frame_type = get_irg_frame_type(irg);
2127         int      n          = get_compound_n_members(frame_type);
2128         int      align_all  = 4;
2129         int      offset     = 0;
2130         for(int i = 0; i < n; ++i) {
2131                 ir_entity *entity      = get_compound_member(frame_type, i);
2132                 ir_type   *entity_type = get_entity_type(entity);
2133
2134                 int align = get_type_alignment_bytes(entity_type);
2135                 if(align > align_all)
2136                         align_all = align;
2137                 int misalign = 0;
2138                 if(align > 0) {
2139                         misalign  = offset % align;
2140                         offset   += misalign;
2141                 }
2142
2143                 set_entity_offset(entity, offset);
2144                 offset += get_type_size_bytes(entity_type);
2145         }
2146         set_type_size_bytes(frame_type, offset);
2147         set_type_alignment_bytes(frame_type, align_all);
2148         set_type_state(frame_type, layout_fixed);
2149
2150         irg_vrfy(irg);
2151 }
2152
2153 static void create_global_variable(declaration_t *declaration)
2154 {
2155         ir_type   *global_type = get_glob_type();
2156         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
2157                                   global_type);
2158
2159         ir_entity *entity = declaration->v.entity;
2160         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
2161                 set_entity_visibility(entity, visibility_local);
2162         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
2163                 set_entity_visibility(entity, visibility_external_allocated);
2164         } else {
2165                 set_entity_visibility(entity, visibility_external_visible);
2166         }
2167         current_ir_graph = get_const_code_irg();
2168         create_initializer(declaration);
2169 }
2170
2171 static void context_to_firm(context_t *context)
2172 {
2173         declaration_t *declaration = context->declarations;
2174         for( ; declaration != NULL; declaration = declaration->next) {
2175                 if(declaration->namespace != NAMESPACE_NORMAL)
2176                         continue;
2177                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2178                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2179                         continue;
2180                 if(declaration->symbol == NULL)
2181                         continue;
2182
2183                 type_t *type = declaration->type;
2184                 if(type->type == TYPE_FUNCTION) {
2185                         create_function(declaration);
2186                 } else {
2187                         create_global_variable(declaration);
2188                 }
2189         }
2190 }
2191
2192 void translation_unit_to_firm(translation_unit_t *unit)
2193 {
2194         /* remove me later TODO FIXME */
2195         (void) get_type_size;
2196
2197         /* just to be sure */
2198         continue_label      = NULL;
2199         break_label         = NULL;
2200         current_switch_cond = NULL;
2201
2202         context_to_firm(& unit->context);
2203 }