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
 544 static dbg_info *get_dbg_info(const source_position_t *pos)
 545 {
 546         return (dbg_info*) pos;
 547 }
 548
 549 static ir_node *const_to_firm(const const_t *cnst)
 550 {
 551         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 552         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 553
 554         tarval   *tv;
 555         if(mode_is_float(mode)) {
 556                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 557         } else {
 558                 tv = new_tarval_from_long(cnst->v.int_value, mode);
 559         }
 560
 561         return new_d_Const(dbgi, mode, tv);
 562 }
 563
 564 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 565 {
 566         assert(entity != NULL);
 567         union symconst_symbol sym;
 568         sym.entity_p = entity;
 569         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 570 }
 571
 572 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 573 {
 574         ir_type   *global_type = get_glob_type();
 575         ir_type   *type        = new_type_array(unique_ident("strtype"), 1,
 576                                                 ir_type_const_char);
 577
 578         ident     *id     = unique_ident("Lstr");
 579         ir_entity *entity = new_entity(global_type, id, type);
 580         set_entity_ld_ident(entity, id);
 581         set_entity_variability(entity, variability_constant);
 582
 583         ir_type    *elem_type = ir_type_const_char;
 584         ir_mode    *mode      = get_type_mode(elem_type);
 585
 586         const char *string = literal->value;
 587         size_t      slen   = strlen(string) + 1;
 588
 589         set_array_lower_bound_int(type, 0, 0);
 590         set_array_upper_bound_int(type, 0, slen);
 591         set_type_size_bytes(type, slen);
 592         set_type_state(type, layout_fixed);
 593
 594         tarval **tvs = xmalloc(slen * sizeof(tvs[0]));
 595         for(size_t i = 0; i < slen; ++i) {
 596                 tvs[i] = new_tarval_from_long(string[i], mode);
 597         }
 598
 599         set_array_entity_values(entity, tvs, slen);
 600         free(tvs);
 601
 602         dbg_info *dbgi = get_dbg_info(&literal->expression.source_position);
 603
 604         return create_symconst(dbgi, entity);
 605 }
 606
 607 static ir_node *load_from_expression_addr(type_t *type, ir_node *addr,
 608                                           dbg_info *dbgi)
 609 {
 610         ir_mode *mode     = get_ir_mode(type);
 611         ir_node *memory   = get_store();
 612         ir_node *load     = new_d_Load(dbgi, memory, addr, mode);
 613         ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 614         ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
 615         set_store(load_mem);
 616
 617         return load_res;
 618 }
 619
 620 static ir_node *deref_address(type_t *const type, ir_node *const addr,
 621                               dbg_info *const dbgi)
 622 {
 623         switch (type->type) {
 624                 case TYPE_ARRAY:
 625                 case TYPE_COMPOUND_STRUCT:
 626                 case TYPE_COMPOUND_UNION:
 627                         return addr;
 628
 629                 default:
 630                         return load_from_expression_addr(type, addr, dbgi);
 631         }
 632 }
 633
 634 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 635 {
 636         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 637         declaration_t *declaration = ref->declaration;
 638         type_t        *type        = skip_typeref(declaration->type);
 639
 640         switch((declaration_type_t) declaration->declaration_type) {
 641         case DECLARATION_TYPE_UNKNOWN:
 642                 break;
 643         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 644                 ir_mode *mode = get_ir_mode(type);
 645                 return get_value(declaration->v.value_number, mode);
 646         }
 647         case DECLARATION_TYPE_FUNCTION: {
 648                 return create_symconst(dbgi, declaration->v.entity);
 649         }
 650         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 651                 ir_entity *entity   = declaration->v.entity;
 652                 ir_node   *symconst = create_symconst(dbgi, entity);
 653                 return deref_address(type, symconst, dbgi);
 654         }
 655         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 656                 ir_entity *entity = declaration->v.entity;
 657                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 658                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 659                 return deref_address(type, sel, dbgi);
 660         }
 661
 662         case DECLARATION_TYPE_COMPOUND_MEMBER:
 663         case DECLARATION_TYPE_LABEL_BLOCK:
 664                 panic("not implemented reference type");
 665         }
 666
 667         panic("reference to declaration with unknown type found");
 668 }
 669
 670 static ir_node *reference_addr(const reference_expression_t *ref)
 671 {
 672         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 673         declaration_t *declaration = ref->declaration;
 674
 675         switch((declaration_type_t) declaration->declaration_type) {
 676         case DECLARATION_TYPE_UNKNOWN:
 677                 break;
 678         case DECLARATION_TYPE_LOCAL_VARIABLE:
 679                 panic("local variable without entity has no address");
 680         case DECLARATION_TYPE_FUNCTION: {
 681                 return create_symconst(dbgi, declaration->v.entity);
 682         }
 683         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 684                 ir_entity *entity   = declaration->v.entity;
 685                 ir_node   *symconst = create_symconst(dbgi, entity);
 686                 return symconst;
 687         }
 688         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 689                 ir_entity *entity = declaration->v.entity;
 690                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 691                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 692
 693                 return sel;
 694         }
 695         case DECLARATION_TYPE_COMPOUND_MEMBER:
 696         case DECLARATION_TYPE_LABEL_BLOCK:
 697                 panic("not implemented reference type");
 698         }
 699
 700         panic("reference to declaration with unknown type found");
 701 }
 702
 703 static ir_node *call_expression_to_firm(const call_expression_t *call)
 704 {
 705         assert(get_cur_block() != NULL);
 706
 707         expression_t  *function = call->function;
 708         ir_node       *callee   = expression_to_firm(function);
 709
 710         assert(function->datatype->type == TYPE_FUNCTION);
 711         function_type_t *function_type = (function_type_t*) function->datatype;
 712
 713         int              n_parameters = 0;
 714         call_argument_t *argument     = call->arguments;
 715         for( ; argument != NULL; argument = argument->next) {
 716                 ++n_parameters;
 717         }
 718
 719         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 720         ir_type *new_method_type = NULL;
 721         if(function_type->variadic || function_type->unspecified_parameters) {
 722                 /* we need to construct a new method type matching the call
 723                  * arguments... */
 724                 int n_res       = get_method_n_ress(ir_method_type);
 725                 new_method_type = new_type_method(unique_ident("calltype"),
 726                                                   n_parameters, n_res);
 727                 set_method_calling_convention(new_method_type,
 728                                get_method_calling_convention(ir_method_type));
 729                 set_method_additional_properties(new_method_type,
 730                                get_method_additional_properties(ir_method_type));
 731
 732                 for(int i = 0; i < n_res; ++i) {
 733                         set_method_res_type(new_method_type, i,
 734                                             get_method_res_type(ir_method_type, i));
 735                 }
 736         }
 737         ir_node *in[n_parameters];
 738
 739         argument = call->arguments;
 740         int n = 0;
 741         for( ; argument != NULL; argument = argument->next) {
 742                 expression_t *expression = argument->expression;
 743                 ir_node      *arg_node   = expression_to_firm(expression);
 744
 745                 in[n] = arg_node;
 746                 if(new_method_type != NULL) {
 747                         ir_type *irtype = get_ir_type(expression->datatype);
 748                         set_method_param_type(new_method_type, n, irtype);
 749                 }
 750
 751                 n++;
 752         }
 753         assert(n == n_parameters);
 754
 755         if(new_method_type != NULL)
 756                 ir_method_type = new_method_type;
 757
 758         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 759         ir_node  *store = get_store();
 760         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 761                                      ir_method_type);
 762         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 763         set_store(mem);
 764
 765         type_t  *result_type = function_type->result_type;
 766         ir_node *result      = NULL;
 767         if(result_type != type_void) {
 768                 ir_mode *mode    = get_ir_mode(result_type);
 769                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 770                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 771         }
 772
 773         return result;
 774 }
 775
 776 static ir_node *expression_to_addr(const expression_t *expression);
 777 static void create_condition_evaluation(const expression_t *expression,
 778                                         ir_node *true_block,
 779                                         ir_node *false_block);
 780
 781 static void set_value_for_expression(const expression_t *expression,
 782                                      ir_node *value)
 783 {
 784         if(expression->type == EXPR_REFERENCE) {
 785                 reference_expression_t *ref = (reference_expression_t*) expression;
 786
 787                 declaration_t *declaration = ref->declaration;
 788                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 789                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 790                         set_value(declaration->v.value_number, value);
 791                         return;
 792                 }
 793         }
 794
 795         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 796         ir_node  *addr      = expression_to_addr(expression);
 797         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 798         ir_node  *memory    = get_store();
 799         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 800         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 801         set_store(store_mem);
 802 }
 803
 804 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 805 {
 806         ir_mode *value_mode = get_irn_mode(value);
 807
 808         if(value_mode == dest_mode)
 809                 return value;
 810
 811         if(dest_mode == mode_b) {
 812                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 813                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 814                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 815                 return proj;
 816         }
 817
 818         return new_d_Conv(dbgi, value, dest_mode);
 819 }
 820
 821 static ir_node *create_incdec(const unary_expression_t *expression)
 822 {
 823         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
 824         type_t       *type  = expression->expression.datatype;
 825         ir_mode      *mode  = get_ir_mode(type);
 826         expression_t *value = expression->value;
 827
 828         ir_node *value_node = expression_to_firm(value);
 829
 830         ir_node *offset;
 831         if(type->type == TYPE_POINTER) {
 832                 pointer_type_t *pointer_type = (pointer_type_t*) type;
 833                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
 834                 offset = new_Const_long(mode_Is, elem_size);
 835         } else {
 836                 assert(is_type_arithmetic(type));
 837                 offset = new_Const(mode, get_mode_one(mode));
 838         }
 839
 840         ir_node *new_value;
 841         switch(expression->type) {
 842         case UNEXPR_POSTFIX_INCREMENT: {
 843                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 844                 set_value_for_expression(value, new_value);
 845                 return value_node;
 846         }
 847         case UNEXPR_POSTFIX_DECREMENT: {
 848                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 849                 set_value_for_expression(value, new_value);
 850                 return value_node;
 851         }
 852         case UNEXPR_PREFIX_INCREMENT: {
 853                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 854                 set_value_for_expression(value, new_value);
 855                 return new_value;
 856         }
 857         case UNEXPR_PREFIX_DECREMENT: {
 858                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 859                 set_value_for_expression(value, new_value);
 860                 return new_value;
 861         }
 862         default:
 863                 panic("no incdec expr in create_incdec");
 864         }
 865
 866         return new_value;
 867 }
 868
 869 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 870 {
 871         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 872         type_t   *type = expression->expression.datatype;
 873         ir_mode  *mode = get_ir_mode(type);
 874
 875         if(expression->type == UNEXPR_TAKE_ADDRESS)
 876                 return expression_to_addr(expression->value);
 877
 878         const expression_t *value      = expression->value;
 879         ir_node            *value_node = expression_to_firm(value);
 880
 881         switch(expression->type) {
 882         case UNEXPR_NEGATE:
 883                 return new_d_Minus(dbgi, value_node, mode);
 884         case UNEXPR_PLUS:
 885                 return value_node;
 886         case UNEXPR_BITWISE_NEGATE:
 887                 return new_d_Not(dbgi, value_node, mode);
 888         case UNEXPR_NOT:
 889                 if(get_irn_mode(value_node) != mode_b) {
 890                         value_node = create_conv(dbgi, value_node, mode_b);
 891                 }
 892                 value_node = new_d_Not(dbgi, value_node, mode_b);
 893                 if(mode != mode_b) {
 894                         value_node = create_conv(dbgi, value_node, mode);
 895                 }
 896                 return value_node;
 897         case UNEXPR_DEREFERENCE:
 898                 return load_from_expression_addr(type, value_node, dbgi);
 899         case UNEXPR_POSTFIX_INCREMENT:
 900         case UNEXPR_POSTFIX_DECREMENT:
 901         case UNEXPR_PREFIX_INCREMENT:
 902         case UNEXPR_PREFIX_DECREMENT:
 903                 return create_incdec(expression);
 904         case UNEXPR_CAST:
 905                 return create_conv(dbgi, value_node, mode);
 906
 907         case UNEXPR_TAKE_ADDRESS:
 908         case UNEXPR_INVALID:
 909                 break;
 910         }
 911         panic("invalid UNEXPR type found");
 912 }
 913
 914 static long get_pnc(binary_expression_type_t type)
 915 {
 916         switch(type) {
 917         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 918         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 919         case BINEXPR_LESS:         return pn_Cmp_Lt;
 920         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 921         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 922         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 923         default:
 924                 break;
 925         }
 926         panic("trying to get pn_Cmp from non-comparison binexpr type");
 927 }
 928
 929 static ir_node *create_lazy_op(const binary_expression_t *expression)
 930 {
 931         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 932         type_t   *type = expression->expression.datatype;
 933         ir_mode  *mode = get_ir_mode(type);
 934
 935         ir_node *cur_block = get_cur_block();
 936
 937         ir_node *one_block = new_immBlock();
 938         ir_node *one       = new_Const(mode, get_mode_one(mode));
 939         ir_node *jmp_one   = new_d_Jmp(dbgi);
 940
 941         ir_node *zero_block = new_immBlock();
 942         ir_node *zero       = new_Const(mode, get_mode_null(mode));
 943         ir_node *jmp_zero   = new_d_Jmp(dbgi);
 944
 945         set_cur_block(cur_block);
 946         create_condition_evaluation((const expression_t*) expression,
 947                                     one_block, zero_block);
 948         mature_immBlock(one_block);
 949         mature_immBlock(zero_block);
 950
 951         ir_node *common_block = new_immBlock();
 952         add_immBlock_pred(common_block, jmp_one);
 953         add_immBlock_pred(common_block, jmp_zero);
 954         mature_immBlock(common_block);
 955
 956         ir_node *in[2] = { one, zero };
 957         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
 958
 959         return val;
 960 }
 961
 962 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
 963                                             ir_node *right, ir_mode *mode);
 964
 965 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
 966                                         create_arithmetic_func func)
 967 {
 968         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 969         ir_node  *left  = expression_to_firm(expression->left);
 970         ir_node  *right = expression_to_firm(expression->right);
 971         type_t   *type  = expression->right->datatype;
 972         /* be careful with the modes, because in asithmetic assign nodes only
 973          * the right operand has the mode of the arithmetic alread */
 974         ir_mode  *mode  = get_ir_mode(type);
 975         left            = create_conv(dbgi, left, mode);
 976         ir_node  *res   = func(dbgi, left, right, mode);
 977
 978         return res;
 979 }
 980
 981 static ir_node *create_arithmetic_assign_binop(
 982                 const binary_expression_t *expression, create_arithmetic_func func)
 983 {
 984         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
 985         ir_node  *value = create_arithmetic_binop(expression, func);
 986         type_t   *type  = expression->expression.datatype;
 987         ir_mode  *mode  = get_ir_mode(type);
 988
 989         assert(type->type != TYPE_POINTER);
 990
 991         value = create_conv(dbgi, value, mode);
 992         set_value_for_expression(expression->left, value);
 993
 994         return value;
 995 }
 996
 997 static ir_node *create_add(const binary_expression_t *expression)
 998 {
 999         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1000         ir_node  *left  = expression_to_firm(expression->left);
1001         ir_node  *right = expression_to_firm(expression->right);
1002         type_t   *type  = expression->expression.datatype;
1003         ir_mode  *mode  = get_ir_mode(type);
1004
1005         expression_t *expr_left  = expression->left;
1006         expression_t *expr_right = expression->right;
1007         type_t       *type_left  = skip_typeref(expr_left->datatype);
1008         type_t       *type_right = skip_typeref(expr_right->datatype);
1009
1010         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1011                 return new_d_Add(dbgi, left, right, mode);
1012         }
1013
1014         ir_node        *pointer;
1015         ir_node        *integer;
1016         pointer_type_t *pointer_type;
1017         if(type_left->type == TYPE_POINTER) {
1018                 pointer      = left;
1019                 integer      = right;
1020                 pointer_type = (pointer_type_t*) type_left;
1021         } else {
1022                 assert(type_right->type == TYPE_POINTER);
1023                 pointer      = right;
1024                 integer      = left;
1025                 pointer_type = (pointer_type_t*) type_right;
1026         }
1027
1028         type_t   *points_to = pointer_type->points_to;
1029         unsigned  elem_size = get_type_size(points_to);
1030
1031         assert(elem_size >= 1);
1032         if(elem_size > 1) {
1033                 integer       = create_conv(dbgi, integer, mode_Is);
1034                 ir_node *cnst = new_Const_long(mode_Is, (int) elem_size);
1035                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
1036                 integer = mul;
1037         }
1038
1039         ir_node *res = new_d_Add(dbgi, pointer, integer, mode);
1040
1041         return res;
1042 }
1043
1044 static ir_node *create_sub(const binary_expression_t *expression)
1045 {
1046         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1047         ir_node  *left  = expression_to_firm(expression->left);
1048         ir_node  *right = expression_to_firm(expression->right);
1049         type_t   *type  = expression->expression.datatype;
1050         ir_mode  *mode  = get_ir_mode(type);
1051
1052         expression_t *expr_left  = expression->left;
1053         expression_t *expr_right = expression->right;
1054         type_t       *type_left  = skip_typeref(expr_left->datatype);
1055         type_t       *type_right = skip_typeref(expr_right->datatype);
1056
1057         if((is_type_arithmetic(type_left) && is_type_arithmetic(type_right))
1058                         || (type_left->type == TYPE_POINTER
1059                                 && type_right->type == TYPE_POINTER)) {
1060                 return new_d_Sub(dbgi, left, right, mode);
1061         }
1062
1063         assert(type_right->type == TYPE_POINTER);
1064         ir_node        *pointer      = left;
1065         ir_node        *integer      = right;
1066         pointer_type_t *pointer_type = (pointer_type_t*) type_right;
1067
1068         type_t   *points_to = pointer_type->points_to;
1069         unsigned  elem_size = get_type_size(points_to);
1070
1071         assert(elem_size >= 1);
1072         if(elem_size > 1) {
1073                 ir_node *cnst = new_Const_long(mode_Iu, elem_size);
1074                 ir_node *mul  = new_d_Mul(dbgi, integer, cnst, mode_Iu);
1075                 integer = mul;
1076         }
1077
1078         ir_node *res = new_d_Sub(dbgi, pointer, integer, mode);
1079
1080         return res;
1081 }
1082
1083 static ir_node *create_shift(const binary_expression_t *expression)
1084 {
1085         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1086         ir_node  *left  = expression_to_firm(expression->left);
1087         ir_node  *right = expression_to_firm(expression->right);
1088         type_t   *type  = expression->expression.datatype;
1089         ir_mode  *mode  = get_ir_mode(type);
1090
1091         /* firm always wants the shift count to be unsigned */
1092         right = create_conv(dbgi, right, mode_Iu);
1093
1094         ir_node *res;
1095
1096         switch(expression->type) {
1097         case BINEXPR_SHIFTLEFT:
1098                 res = new_d_Shl(dbgi, left, right, mode);
1099                 break;
1100         case BINEXPR_SHIFTRIGHT: {
1101                  expression_t *expr_left = expression->left;
1102                  type_t       *type_left = skip_typeref(expr_left->datatype);
1103
1104                  if(is_type_signed(type_left)) {
1105                         res = new_d_Shrs(dbgi, left, right, mode);
1106                  } else {
1107                          res = new_d_Shr(dbgi, left, right, mode);
1108                  }
1109                  break;
1110         }
1111         default:
1112                 panic("create shift op called for non-shift op");
1113         }
1114
1115         return res;
1116 }
1117
1118
1119 static ir_node *create_divmod(const binary_expression_t *expression)
1120 {
1121         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1122         ir_node  *left  = expression_to_firm(expression->left);
1123         ir_node  *right = expression_to_firm(expression->right);
1124         ir_node  *pin   = new_Pin(new_NoMem());
1125         type_t   *type  = expression->expression.datatype;
1126         ir_mode  *mode  = get_ir_mode(type);
1127         ir_node  *op;
1128         ir_node  *res;
1129
1130         switch (expression->type)  {
1131                 case BINEXPR_DIV:
1132                 case BINEXPR_DIV_ASSIGN:
1133                         if(mode_is_float(mode)) {
1134                                 op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1135                                 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1136                         } else {
1137                                 op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1138                                 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1139                         }
1140                         break;
1141
1142                 case BINEXPR_MOD:
1143                 case BINEXPR_MOD_ASSIGN:
1144                         assert(!mode_is_float(mode));
1145                         op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1146                         res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1147                         break;
1148
1149                 default: panic("unexpected binary expression type in create_divmod()");
1150         }
1151
1152         return res;
1153 }
1154
1155 static ir_node *create_arithmetic_assign_divmod(
1156                 const binary_expression_t *expression)
1157 {
1158         ir_node  *      value = create_divmod(expression);
1159         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1160         type_t   *const type  = expression->expression.datatype;
1161         ir_mode  *const mode  = get_ir_mode(type);
1162
1163         assert(type->type != TYPE_POINTER);
1164
1165         value = create_conv(dbgi, value, mode);
1166         set_value_for_expression(expression->left, value);
1167
1168         return value;
1169 }
1170
1171
1172 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1173 {
1174         binary_expression_type_t type = expression->type;
1175         switch(type) {
1176         case BINEXPR_EQUAL:
1177         case BINEXPR_NOTEQUAL:
1178         case BINEXPR_LESS:
1179         case BINEXPR_LESSEQUAL:
1180         case BINEXPR_GREATER:
1181         case BINEXPR_GREATEREQUAL: {
1182                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1183                 ir_node *left  = expression_to_firm(expression->left);
1184                 ir_node *right = expression_to_firm(expression->right);
1185                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1186                 long     pnc   = get_pnc(type);
1187                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1188                 return proj;
1189         }
1190         case BINEXPR_ASSIGN: {
1191                 ir_node *right = expression_to_firm(expression->right);
1192                 set_value_for_expression(expression->left, right);
1193                 return right;
1194         }
1195         case BINEXPR_ADD:
1196                 return create_add(expression);
1197         case BINEXPR_SUB:
1198                 return create_sub(expression);
1199         case BINEXPR_MUL:
1200                 return create_arithmetic_binop(expression, new_d_Mul);
1201         case BINEXPR_BITWISE_AND:
1202                 return create_arithmetic_binop(expression, new_d_And);
1203         case BINEXPR_BITWISE_OR:
1204                 return create_arithmetic_binop(expression, new_d_Or);
1205         case BINEXPR_BITWISE_XOR:
1206                 return create_arithmetic_binop(expression, new_d_Eor);
1207         case BINEXPR_SHIFTLEFT:
1208         case BINEXPR_SHIFTRIGHT:
1209                 return create_shift(expression);
1210         case BINEXPR_DIV:
1211         case BINEXPR_MOD:
1212                 return create_divmod(expression);
1213         case BINEXPR_LOGICAL_AND:
1214         case BINEXPR_LOGICAL_OR:
1215                 return create_lazy_op(expression);
1216         case BINEXPR_COMMA:
1217                 expression_to_firm(expression->left);
1218                 return expression_to_firm(expression->right);
1219         case BINEXPR_ADD_ASSIGN:
1220                 return create_arithmetic_assign_binop(expression, new_d_Add);
1221         case BINEXPR_SUB_ASSIGN:
1222                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1223         case BINEXPR_MUL_ASSIGN:
1224                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1225         case BINEXPR_DIV_ASSIGN:
1226                 return create_arithmetic_assign_divmod(expression);
1227         case BINEXPR_BITWISE_AND_ASSIGN:
1228                 return create_arithmetic_assign_binop(expression, new_d_And);
1229         case BINEXPR_BITWISE_OR_ASSIGN:
1230                 return create_arithmetic_assign_binop(expression, new_d_Or);
1231         case BINEXPR_BITWISE_XOR_ASSIGN:
1232                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1233         case BINEXPR_SHIFTLEFT_ASSIGN:
1234                 return create_arithmetic_assign_binop(expression, new_d_Shl);
1235         case BINEXPR_SHIFTRIGHT_ASSIGN:
1236                 return create_arithmetic_assign_binop(expression, new_d_Shr);
1237         default:
1238                 panic("TODO binexpr type");
1239         }
1240 }
1241
1242 static ir_node *array_access_addr(const array_access_expression_t *expression)
1243 {
1244         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1245
1246         ir_node *base_addr = expression_to_firm(expression->array_ref);
1247         ir_node *offset    = expression_to_firm(expression->index);
1248         offset             = create_conv(dbgi, offset, mode_Iu);
1249
1250         unsigned elem_size       = get_type_size(expression->expression.datatype);
1251         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1252         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1253                                              mode_Iu);
1254         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1255
1256         return result;
1257 }
1258
1259 static ir_node *array_access_to_firm(
1260                 const array_access_expression_t *expression)
1261 {
1262         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1263         ir_node  *addr = array_access_addr(expression);
1264         type_t   *type = expression->expression.datatype;
1265         return deref_address(type, addr, dbgi);
1266 }
1267
1268 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1269 {
1270         type_t *type = expression->type;
1271         if(type == NULL) {
1272                 type = expression->size_expression->datatype;
1273                 assert(type != NULL);
1274         }
1275
1276         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1277         unsigned  size      = get_type_size(type);
1278         ir_node  *size_node = new_Const_long(mode, size);
1279
1280         return size_node;
1281 }
1282
1283 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1284 {
1285         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1286
1287         ir_node *cur_block   = get_cur_block();
1288
1289         /* create the true block */
1290         ir_node *true_block  = new_immBlock();
1291
1292         ir_node *true_val = expression_to_firm(expression->true_expression);
1293         ir_node *true_jmp = new_Jmp();
1294
1295         /* create the false block */
1296         ir_node *false_block = new_immBlock();
1297
1298         ir_node *false_val = expression_to_firm(expression->false_expression);
1299         ir_node *false_jmp = new_Jmp();
1300
1301         /* create the condition evaluation */
1302         set_cur_block(cur_block);
1303         create_condition_evaluation(expression->condition, true_block, false_block);
1304         mature_immBlock(true_block);
1305         mature_immBlock(false_block);
1306
1307         /* create the common block */
1308         ir_node *common_block = new_immBlock();
1309         add_immBlock_pred(common_block, true_jmp);
1310         add_immBlock_pred(common_block, false_jmp);
1311         mature_immBlock(common_block);
1312
1313         ir_node *in[2] = { true_val, false_val };
1314         ir_mode *mode  = get_irn_mode(true_val);
1315         assert(get_irn_mode(false_val) == mode);
1316         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1317
1318         return val;
1319 }
1320
1321 static ir_node *select_addr(const select_expression_t *expression)
1322 {
1323         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1324
1325         ir_node *compound_addr = expression_to_firm(expression->compound);
1326
1327         declaration_t *entry = expression->compound_entry;
1328         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1329         ir_entity     *entity = entry->v.entity;
1330
1331         assert(entity != NULL);
1332
1333         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1334
1335         return sel;
1336 }
1337
1338 static ir_node *select_to_firm(const select_expression_t *expression)
1339 {
1340         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1341         ir_node  *addr = select_addr(expression);
1342         type_t   *type = expression->expression.datatype;
1343         return deref_address(type, addr, dbgi);
1344 }
1345
1346 static ir_node *dereference_addr(const unary_expression_t *const expression)
1347 {
1348         assert(expression->type == UNEXPR_DEREFERENCE);
1349         return expression_to_firm(expression->value);
1350 }
1351
1352 static ir_node *expression_to_addr(const expression_t *expression)
1353 {
1354         switch(expression->type) {
1355         case EXPR_REFERENCE:
1356                 return reference_addr((const reference_expression_t*) expression);
1357         case EXPR_ARRAY_ACCESS:
1358                 return array_access_addr((const array_access_expression_t*) expression);
1359         case EXPR_SELECT:
1360                 return select_addr((const select_expression_t*) expression);
1361         case EXPR_UNARY: {
1362                 const unary_expression_t *const unary_expr =
1363                         (const unary_expression_t*)expression;
1364                 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1365                         return dereference_addr(unary_expr);
1366                 }
1367                 break;
1368         }
1369         default:
1370                 break;
1371         }
1372         panic("trying to get address of non-lvalue");
1373 }
1374
1375 static ir_node *_expression_to_firm(const expression_t *expression)
1376 {
1377         switch(expression->type) {
1378         case EXPR_CONST:
1379                 return const_to_firm((const const_t*) expression);
1380         case EXPR_STRING_LITERAL:
1381                 return string_literal_to_firm((const string_literal_t*) expression);
1382         case EXPR_REFERENCE:
1383                 return reference_expression_to_firm(
1384                                 (const reference_expression_t*) expression);
1385         case EXPR_CALL:
1386                 return call_expression_to_firm((const call_expression_t*) expression);
1387         case EXPR_UNARY:
1388                 return unary_expression_to_firm((const unary_expression_t*) expression);
1389         case EXPR_BINARY:
1390                 return binary_expression_to_firm(
1391                                 (const binary_expression_t*) expression);
1392         case EXPR_ARRAY_ACCESS:
1393                 return array_access_to_firm(
1394                                 (const array_access_expression_t*) expression);
1395         case EXPR_SIZEOF:
1396                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1397         case EXPR_CONDITIONAL:
1398                 return conditional_to_firm((const conditional_expression_t*)expression);
1399         case EXPR_SELECT:
1400                 return select_to_firm((const select_expression_t*) expression);
1401         case EXPR_FUNCTION:
1402         case EXPR_OFFSETOF:
1403         case EXPR_PRETTY_FUNCTION:
1404         case EXPR_VA_ARG:
1405         case EXPR_STATEMENT:
1406         case EXPR_BUILTIN_SYMBOL:
1407                 panic("unimplemented expression found");
1408
1409         case EXPR_UNKNOWN:
1410         case EXPR_INVALID:
1411                 break;
1412         }
1413         panic("invalid expression found");
1414 }
1415
1416 static ir_node *expression_to_firm(const expression_t *expression)
1417 {
1418         ir_node *res = _expression_to_firm(expression);
1419
1420         if(res != NULL && get_irn_mode(res) == mode_b) {
1421                 ir_mode *mode = get_ir_mode(expression->datatype);
1422                 res           = create_conv(NULL, res, mode);
1423         }
1424
1425         return res;
1426 }
1427
1428 static ir_node *expression_to_modeb(const expression_t *expression)
1429 {
1430         ir_node *res = _expression_to_firm(expression);
1431         res          = create_conv(NULL, res, mode_b);
1432
1433         return res;
1434 }
1435
1436 /**
1437  * create a short-circuit expression evaluation that tries to construct
1438  * efficient control flow structures for &&, || and ! expressions
1439  */
1440 static void create_condition_evaluation(const expression_t *expression,
1441                                         ir_node *true_block,
1442                                         ir_node *false_block)
1443 {
1444         switch(expression->type) {
1445         case EXPR_UNARY: {
1446                 unary_expression_t *unary_expression = (unary_expression_t*) expression;
1447                 if(unary_expression->type == UNEXPR_NOT) {
1448                         create_condition_evaluation(unary_expression->value, false_block,
1449                                                     true_block);
1450                         return;
1451                 }
1452                 break;
1453         }
1454         case EXPR_BINARY: {
1455                 binary_expression_t *binary_expression
1456                         = (binary_expression_t*) expression;
1457                 if(binary_expression->type == BINEXPR_LOGICAL_AND) {
1458                         ir_node *cur_block   = get_cur_block();
1459                         ir_node *extra_block = new_immBlock();
1460                         set_cur_block(cur_block);
1461                         create_condition_evaluation(binary_expression->left, extra_block,
1462                                                     false_block);
1463                         mature_immBlock(extra_block);
1464                         set_cur_block(extra_block);
1465                         create_condition_evaluation(binary_expression->right, true_block,
1466                                                     false_block);
1467                         return;
1468                 }
1469                 if(binary_expression->type == BINEXPR_LOGICAL_OR) {
1470                         ir_node *cur_block   = get_cur_block();
1471                         ir_node *extra_block = new_immBlock();
1472                         set_cur_block(cur_block);
1473                         create_condition_evaluation(binary_expression->left, true_block,
1474                                                     extra_block);
1475                         mature_immBlock(extra_block);
1476                         set_cur_block(extra_block);
1477                         create_condition_evaluation(binary_expression->right, true_block,
1478                                                     false_block);
1479                         return;
1480                 }
1481                 break;
1482         }
1483         default:
1484                 break;
1485         }
1486
1487         dbg_info *dbgi       = get_dbg_info(&expression->source_position);
1488         ir_node  *condition  = expression_to_modeb(expression);
1489         ir_node  *cond       = new_d_Cond(dbgi, condition);
1490         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1491         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1492
1493         add_immBlock_pred(true_block, true_proj);
1494         add_immBlock_pred(false_block, false_proj);
1495
1496         set_cur_block(NULL);
1497 }
1498
1499 static void statement_to_firm(statement_t *statement);
1500
1501 static void return_statement_to_firm(return_statement_t *statement)
1502 {
1503         if(get_cur_block() == NULL)
1504                 return;
1505
1506         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1507         ir_node  *ret;
1508
1509         if(statement->return_value != NULL) {
1510                 ir_node *retval = expression_to_firm(statement->return_value);
1511                 ir_node *in[1];
1512
1513                 in[0] = retval;
1514                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1515         } else {
1516                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1517         }
1518         ir_node *end_block = get_irg_end_block(current_ir_graph);
1519         add_immBlock_pred(end_block, ret);
1520
1521         set_cur_block(NULL);
1522 }
1523
1524 static void compound_statement_to_firm(compound_statement_t *compound)
1525 {
1526         statement_t *statement = compound->statements;
1527         for( ; statement != NULL; statement = statement->next) {
1528                 //context2firm(&statement->context);
1529                 statement_to_firm(statement);
1530         }
1531 }
1532
1533 static void expression_statement_to_firm(expression_statement_t *statement)
1534 {
1535         if(get_cur_block() == NULL)
1536                 return;
1537
1538         expression_to_firm(statement->expression);
1539 }
1540
1541 static void if_statement_to_firm(if_statement_t *statement)
1542 {
1543         ir_node *cur_block = get_cur_block();
1544
1545         ir_node *fallthrough_block = new_immBlock();
1546
1547         /* the true (blocks) */
1548         ir_node *true_block = new_immBlock();
1549
1550         statement_to_firm(statement->true_statement);
1551         if(get_cur_block() != NULL) {
1552                 ir_node *jmp = new_Jmp();
1553                 add_immBlock_pred(fallthrough_block, jmp);
1554         }
1555
1556         /* the false (blocks) */
1557         ir_node *false_block;
1558         if(statement->false_statement != NULL) {
1559                 false_block = new_immBlock();
1560
1561                 statement_to_firm(statement->false_statement);
1562                 if(get_cur_block() != NULL) {
1563                         ir_node *jmp = new_Jmp();
1564                         add_immBlock_pred(fallthrough_block, jmp);
1565                 }
1566         } else {
1567                 false_block = fallthrough_block;
1568         }
1569
1570         /* create the condition */
1571         if(cur_block != NULL) {
1572                 set_cur_block(cur_block);
1573                 create_condition_evaluation(statement->condition, true_block,
1574                                             false_block);
1575         }
1576
1577         mature_immBlock(true_block);
1578         if(false_block != fallthrough_block) {
1579                 mature_immBlock(false_block);
1580         }
1581         mature_immBlock(fallthrough_block);
1582
1583         set_cur_block(fallthrough_block);
1584 }
1585
1586 static void while_statement_to_firm(while_statement_t *statement)
1587 {
1588         ir_node *jmp = NULL;
1589         if(get_cur_block() != NULL) {
1590                 jmp = new_Jmp();
1591         }
1592
1593         /* create the header block */
1594         ir_node *header_block = new_immBlock();
1595         if(jmp != NULL) {
1596                 add_immBlock_pred(header_block, jmp);
1597         }
1598
1599         /* the false block */
1600         ir_node *false_block = new_immBlock();
1601
1602         /* the loop body */
1603         ir_node *body_block = new_immBlock();
1604
1605         ir_node *old_continue_label = continue_label;
1606         ir_node *old_break_label    = break_label;
1607         continue_label              = header_block;
1608         break_label                 = false_block;
1609
1610         statement_to_firm(statement->body);
1611
1612         assert(continue_label == header_block);
1613         assert(break_label    == false_block);
1614         continue_label = old_continue_label;
1615         break_label    = old_break_label;
1616
1617         if(get_cur_block() != NULL) {
1618                 ir_node *jmp = new_Jmp();
1619                 add_immBlock_pred(header_block, jmp);
1620         }
1621
1622         /* create the condition */
1623         set_cur_block(header_block);
1624
1625         create_condition_evaluation(statement->condition, body_block, false_block);
1626         mature_immBlock(body_block);
1627         mature_immBlock(false_block);
1628         mature_immBlock(header_block);
1629
1630         set_cur_block(false_block);
1631 }
1632
1633 static void do_while_statement_to_firm(do_while_statement_t *statement)
1634 {
1635         ir_node *jmp = NULL;
1636         if(get_cur_block() != NULL) {
1637                 jmp = new_Jmp();
1638         }
1639
1640         /* create the header block */
1641         ir_node *header_block = new_immBlock();
1642
1643         /* the false block */
1644         ir_node *false_block = new_immBlock();
1645
1646         /* the loop body */
1647         ir_node *body_block = new_immBlock();
1648         if(jmp != NULL) {
1649                 add_immBlock_pred(body_block, jmp);
1650         }
1651
1652         ir_node *old_continue_label = continue_label;
1653         ir_node *old_break_label    = break_label;
1654         continue_label              = header_block;
1655         break_label                 = false_block;
1656
1657         statement_to_firm(statement->body);
1658
1659         assert(continue_label == header_block);
1660         assert(break_label    == false_block);
1661         continue_label = old_continue_label;
1662         break_label    = old_break_label;
1663
1664         if(get_cur_block() == NULL) {
1665                 mature_immBlock(header_block);
1666                 mature_immBlock(body_block);
1667                 mature_immBlock(false_block);
1668                 return;
1669         }
1670
1671         ir_node *body_jmp = new_Jmp();
1672         add_immBlock_pred(header_block, body_jmp);
1673         mature_immBlock(header_block);
1674
1675         /* create the condition */
1676         set_cur_block(header_block);
1677
1678         create_condition_evaluation(statement->condition, body_block, false_block);
1679         mature_immBlock(body_block);
1680         mature_immBlock(false_block);
1681         mature_immBlock(header_block);
1682
1683         set_cur_block(false_block);
1684 }
1685
1686 static void for_statement_to_firm(for_statement_t *statement)
1687 {
1688         ir_node *jmp = NULL;
1689         if (get_cur_block() != NULL) {
1690                 if(statement->initialisation != NULL) {
1691                         expression_to_firm(statement->initialisation);
1692                 }
1693                 jmp = new_Jmp();
1694         }
1695
1696         /* create the step block */
1697         ir_node *const step_block = new_immBlock();
1698         if (statement->step != NULL) {
1699                 expression_to_firm(statement->step);
1700         }
1701         ir_node *const step_jmp = new_Jmp();
1702
1703         /* create the header block */
1704         ir_node *const header_block = new_immBlock();
1705         if (jmp != NULL) {
1706                 add_immBlock_pred(header_block, jmp);
1707         }
1708         add_immBlock_pred(header_block, step_jmp);
1709
1710         /* the false block */
1711         ir_node *const false_block = new_immBlock();
1712
1713         /* the loop body */
1714         ir_node *const body_block = new_immBlock();
1715
1716         ir_node *const old_continue_label = continue_label;
1717         ir_node *const old_break_label    = break_label;
1718         continue_label = step_block;
1719         break_label    = false_block;
1720
1721         statement_to_firm(statement->body);
1722
1723         assert(continue_label == step_block);
1724         assert(break_label    == false_block);
1725         continue_label = old_continue_label;
1726         break_label    = old_break_label;
1727
1728         if (get_cur_block() != NULL) {
1729                 ir_node *const jmp = new_Jmp();
1730                 add_immBlock_pred(step_block, jmp);
1731         }
1732
1733         /* create the condition */
1734         set_cur_block(header_block);
1735         if (statement->condition != NULL) {
1736                 create_condition_evaluation(statement->condition, body_block,
1737                                             false_block);
1738         } else {
1739                 keep_alive(header_block);
1740                 ir_node *jmp = new_Jmp();
1741                 add_immBlock_pred(body_block, jmp);
1742         }
1743
1744         mature_immBlock(body_block);
1745         mature_immBlock(false_block);
1746         mature_immBlock(step_block);
1747         mature_immBlock(header_block);
1748         mature_immBlock(false_block);
1749
1750         set_cur_block(false_block);
1751 }
1752
1753 static void create_declaration_entity(declaration_t *declaration,
1754                                       declaration_type_t declaration_type,
1755                                       ir_type *parent_type)
1756 {
1757         ident     *id     = new_id_from_str(declaration->symbol->string);
1758         ir_type   *irtype = get_ir_type(declaration->type);
1759         ir_entity *entity = new_entity(parent_type, id, irtype);
1760         set_entity_ld_ident(entity, id);
1761
1762         declaration->declaration_type = declaration_type;
1763         declaration->v.entity         = entity;
1764         set_entity_variability(entity, variability_uninitialized);
1765         /* TODO: visibility? */
1766 }
1767
1768 static void create_initializer(declaration_t *declaration)
1769 {
1770         initializer_t *initializer = declaration->init.initializer;
1771         if(initializer == NULL)
1772                 return;
1773
1774         if(initializer->type == INITIALIZER_VALUE) {
1775                 assert(initializer->designator == NULL);
1776                 assert(initializer->next == NULL);
1777                 ir_node *init_node = expression_to_firm(initializer->v.value);
1778
1779                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1780                         set_value(declaration->v.value_number, init_node);
1781                 } else {
1782                         ir_entity *entity = declaration->v.entity;
1783
1784                         set_entity_variability(entity, variability_initialized);
1785                         set_atomic_ent_value(entity, init_node);
1786                 }
1787         } else {
1788                 assert(initializer->type == INITIALIZER_LIST);
1789                 panic("list initializer not supported yet");
1790         }
1791 }
1792
1793 static void create_local_variable(declaration_t *declaration)
1794 {
1795         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
1796
1797         bool needs_entity = declaration->address_taken;
1798         type_t *type = skip_typeref(declaration->type);
1799
1800         if(type->type == TYPE_ARRAY
1801                         || type->type == TYPE_COMPOUND_STRUCT
1802                         || type->type == TYPE_COMPOUND_UNION) {
1803                 needs_entity = true;
1804         }
1805
1806         if(needs_entity) {
1807                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
1808                 create_declaration_entity(declaration,
1809                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
1810                                           frame_type);
1811         } else {
1812                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
1813                 declaration->v.value_number   = next_value_number_function;
1814                 ++next_value_number_function;
1815         }
1816
1817         create_initializer(declaration);
1818 }
1819
1820 static void declaration_statement_to_firm(declaration_statement_t *statement)
1821 {
1822         declaration_t *declaration = statement->declarations_begin;
1823         declaration_t *end         = statement->declarations_end->next;
1824         for( ; declaration != end; declaration = declaration->next) {
1825                 type_t *type = declaration->type;
1826
1827                 switch(declaration->storage_class) {
1828                 case STORAGE_CLASS_TYPEDEF:
1829                         continue;
1830                 case STORAGE_CLASS_STATIC:
1831                         panic("static local vars not implemented yet");
1832                 case STORAGE_CLASS_ENUM_ENTRY:
1833                         panic("enum entry declaration in local block found");
1834                 case STORAGE_CLASS_EXTERN:
1835                         panic("extern declaration in local block found");
1836                 case STORAGE_CLASS_NONE:
1837                 case STORAGE_CLASS_AUTO:
1838                 case STORAGE_CLASS_REGISTER:
1839                         if(type->type == TYPE_FUNCTION) {
1840                                 panic("nested functions not supported yet");
1841                         } else {
1842                                 create_local_variable(declaration);
1843                         }
1844                         continue;
1845                 }
1846                 panic("invalid storage class found");
1847         }
1848 }
1849
1850 static void create_jump_statement(const statement_t *statement,
1851                                   ir_node *target_block)
1852 {
1853         if(get_cur_block() == NULL)
1854                 return;
1855
1856         dbg_info *dbgi = get_dbg_info(&statement->source_position);
1857         ir_node  *jump = new_d_Jmp(dbgi);
1858         add_immBlock_pred(target_block, jump);
1859
1860         set_cur_block(NULL);
1861 }
1862
1863 static void switch_statement_to_firm(const switch_statement_t *statement)
1864 {
1865         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1866
1867         ir_node *expression  = expression_to_firm(statement->expression);
1868         ir_node *cond        = new_d_Cond(dbgi, expression);
1869         ir_node *break_block = new_immBlock();
1870
1871         set_cur_block(NULL);
1872
1873         ir_node *const old_switch_cond       = current_switch_cond;
1874         ir_node *const old_break_label       = break_label;
1875         const bool     old_saw_default_label = saw_default_label;
1876         current_switch_cond                  = cond;
1877         break_label                          = break_block;
1878
1879         statement_to_firm(statement->body);
1880
1881         if(get_cur_block() != NULL) {
1882                 ir_node *jmp = new_Jmp();
1883                 add_immBlock_pred(break_block, jmp);
1884         }
1885
1886         if (!saw_default_label) {
1887                 set_cur_block(get_nodes_block(cond));
1888                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
1889                                                         MAGIC_DEFAULT_PN_NUMBER);
1890                 add_immBlock_pred(break_block, proj);
1891         }
1892
1893         assert(current_switch_cond == cond);
1894         assert(break_label         == break_block);
1895         current_switch_cond = old_switch_cond;
1896         break_label         = old_break_label;
1897         saw_default_label   = old_saw_default_label;
1898
1899         mature_immBlock(break_block);
1900         set_cur_block(break_block);
1901 }
1902
1903 static long fold_constant(const expression_t *expression)
1904 {
1905         ir_graph *old_current_ir_graph = current_ir_graph;
1906         current_ir_graph = get_const_code_irg();
1907
1908         ir_node *cnst = expression_to_firm(expression);
1909         if(!is_Const(cnst)) {
1910                 panic("couldn't fold constantl");
1911         }
1912         tarval *tv = get_Const_tarval(cnst);
1913         if(!tarval_is_long(tv)) {
1914                 panic("folded constant not an integer");
1915         }
1916
1917         long res = get_tarval_long(tv);
1918
1919         current_ir_graph = old_current_ir_graph;
1920         return res;
1921 }
1922
1923 static void case_label_to_firm(const case_label_statement_t *statement)
1924 {
1925         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1926
1927         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
1928
1929         /* let's create a node and hope firm constant folding creates a Const
1930          * node... */
1931         ir_node *proj;
1932         set_cur_block(get_nodes_block(current_switch_cond));
1933         if(statement->expression) {
1934                 long pn = fold_constant(statement->expression);
1935                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
1936                         /* oops someone detected our cheating... */
1937                         panic("magic default pn used");
1938                 }
1939                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
1940         } else {
1941                 saw_default_label = true;
1942                 proj = new_d_defaultProj(dbgi, current_switch_cond,
1943                                          MAGIC_DEFAULT_PN_NUMBER);
1944         }
1945
1946         ir_node *block = new_immBlock();
1947         if (fallthrough != NULL) {
1948                 add_immBlock_pred(block, fallthrough);
1949         }
1950         add_immBlock_pred(block, proj);
1951         mature_immBlock(block);
1952 }
1953
1954 static ir_node *get_label_block(declaration_t *label)
1955 {
1956         assert(label->namespace == NAMESPACE_LABEL);
1957
1958         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
1959                 return label->v.block;
1960         }
1961         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
1962
1963         ir_node *old_cur_block = get_cur_block();
1964         ir_node *block         = new_immBlock();
1965         set_cur_block(old_cur_block);
1966
1967         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
1968         label->v.block          = block;
1969
1970         ARR_APP1(ir_node *, imature_blocks, block);
1971
1972         return block;
1973 }
1974
1975 static void label_to_firm(const label_statement_t *statement)
1976 {
1977         ir_node *block = get_label_block(statement->label);
1978
1979         if(get_cur_block() != NULL) {
1980                 ir_node *jmp = new_Jmp();
1981                 add_immBlock_pred(block, jmp);
1982         }
1983
1984         set_cur_block(block);
1985         keep_alive(block);
1986
1987         statement_to_firm(statement->label_statement);
1988 }
1989
1990 static void goto_to_firm(const goto_statement_t *statement)
1991 {
1992         if(get_cur_block() == NULL)
1993                 return;
1994
1995         ir_node *block = get_label_block(statement->label);
1996         ir_node *jmp   = new_Jmp();
1997         add_immBlock_pred(block, jmp);
1998
1999         set_cur_block(NULL);
2000 }
2001
2002 static void statement_to_firm(statement_t *statement)
2003 {
2004         switch(statement->type) {
2005         case STATEMENT_COMPOUND:
2006                 compound_statement_to_firm((compound_statement_t*) statement);
2007                 return;
2008         case STATEMENT_RETURN:
2009                 return_statement_to_firm((return_statement_t*) statement);
2010                 return;
2011         case STATEMENT_EXPRESSION:
2012                 expression_statement_to_firm((expression_statement_t*) statement);
2013                 return;
2014         case STATEMENT_IF:
2015                 if_statement_to_firm((if_statement_t*) statement);
2016                 return;
2017         case STATEMENT_WHILE:
2018                 while_statement_to_firm((while_statement_t*) statement);
2019                 return;
2020         case STATEMENT_DO_WHILE:
2021                 do_while_statement_to_firm((do_while_statement_t*) statement);
2022                 return;
2023         case STATEMENT_DECLARATION:
2024                 declaration_statement_to_firm((declaration_statement_t*) statement);
2025                 return;
2026         case STATEMENT_BREAK:
2027                 create_jump_statement(statement, break_label);
2028                 return;
2029         case STATEMENT_CONTINUE:
2030                 create_jump_statement(statement, continue_label);
2031                 return;
2032         case STATEMENT_SWITCH:
2033                 switch_statement_to_firm((switch_statement_t*) statement);
2034                 return;
2035         case STATEMENT_CASE_LABEL:
2036                 case_label_to_firm((case_label_statement_t*) statement);
2037                 return;
2038         case STATEMENT_FOR:
2039                 for_statement_to_firm((for_statement_t*) statement);
2040                 return;
2041         case STATEMENT_LABEL:
2042                 label_to_firm((label_statement_t*) statement);
2043                 return;
2044         case STATEMENT_GOTO:
2045                 goto_to_firm((goto_statement_t*) statement);
2046                 return;
2047         default:
2048                 break;
2049         }
2050         panic("Statement not implemented\n");
2051 }
2052
2053 static int get_function_n_local_vars(declaration_t *declaration)
2054 {
2055         (void) declaration;
2056         /* TODO */
2057         return 30;
2058 }
2059
2060 static void initialize_function_parameters(declaration_t *declaration)
2061 {
2062         ir_graph *irg         = current_ir_graph;
2063         ir_node  *args        = get_irg_args(irg);
2064         ir_node  *start_block = get_irg_start_block(irg);
2065
2066         int            n         = 0;
2067         declaration_t *parameter = declaration->context.declarations;
2068         for( ; parameter != NULL; parameter = parameter->next) {
2069                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
2070                 type_t *type = parameter->type;
2071
2072                 bool needs_entity = parameter->address_taken;
2073                 if(type->type == TYPE_COMPOUND_STRUCT
2074                                 || type->type == TYPE_COMPOUND_UNION) {
2075                         needs_entity = true;
2076                 }
2077
2078                 if(needs_entity) {
2079                         panic("entities for function parameters not implemented yet");
2080                 }
2081
2082                 ir_mode *mode = get_ir_mode(parameter->type);
2083                 long     pn   = n;
2084                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2085                 ++n;
2086
2087                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2088                 parameter->v.value_number   = next_value_number_function;
2089                 ++next_value_number_function;
2090
2091                 set_value(parameter->v.value_number, proj);
2092         }
2093 }
2094
2095 static void create_function(declaration_t *declaration)
2096 {
2097         ir_entity *entity = get_function_entity(declaration);
2098
2099         if(declaration->init.statement == NULL)
2100                 return;
2101
2102         assert(imature_blocks == NULL);
2103         imature_blocks = NEW_ARR_F(ir_node*, 0);
2104
2105         int       n_local_vars = get_function_n_local_vars(declaration);
2106         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
2107         ir_node  *first_block  = get_cur_block();
2108
2109         next_value_number_function = 0;
2110         initialize_function_parameters(declaration);
2111
2112         statement_to_firm(declaration->init.statement);
2113
2114         ir_node *end_block = get_irg_end_block(irg);
2115
2116         /* do we have a return statement yet? */
2117         if(get_cur_block() != NULL) {
2118                 assert(declaration->type->type == TYPE_FUNCTION);
2119                 const function_type_t* const func_type
2120                         = (const function_type_t*) declaration->type;
2121                 ir_node *ret;
2122                 if (func_type->result_type == type_void) {
2123                         ret = new_Return(get_store(), 0, NULL);
2124                 } else {
2125                         ir_mode *const mode = get_ir_mode(func_type->result_type);
2126                         ir_node *      in[1];
2127                         // §5.1.2.2.3 main implicitly returns 0
2128                         if (strcmp(declaration->symbol->string, "main") == 0) {
2129                                 in[0] = new_Const(mode, get_mode_null(mode));
2130                         } else {
2131                                 in[0] = new_Unknown(mode);
2132                         }
2133                         ret = new_Return(get_store(), 1, in);
2134                 }
2135                 add_immBlock_pred(end_block, ret);
2136         }
2137
2138         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2139                 mature_immBlock(imature_blocks[i]);
2140         }
2141         DEL_ARR_F(imature_blocks);
2142         imature_blocks = NULL;
2143
2144         mature_immBlock(first_block);
2145         mature_immBlock(end_block);
2146
2147         irg_finalize_cons(irg);
2148
2149         /* finalize the frame type */
2150         ir_type *frame_type = get_irg_frame_type(irg);
2151         int      n          = get_compound_n_members(frame_type);
2152         int      align_all  = 4;
2153         int      offset     = 0;
2154         for(int i = 0; i < n; ++i) {
2155                 ir_entity *entity      = get_compound_member(frame_type, i);
2156                 ir_type   *entity_type = get_entity_type(entity);
2157
2158                 int align = get_type_alignment_bytes(entity_type);
2159                 if(align > align_all)
2160                         align_all = align;
2161                 int misalign = 0;
2162                 if(align > 0) {
2163                         misalign  = offset % align;
2164                         offset   += misalign;
2165                 }
2166
2167                 set_entity_offset(entity, offset);
2168                 offset += get_type_size_bytes(entity_type);
2169         }
2170         set_type_size_bytes(frame_type, offset);
2171         set_type_alignment_bytes(frame_type, align_all);
2172         set_type_state(frame_type, layout_fixed);
2173
2174         irg_vrfy(irg);
2175 }
2176
2177 static void create_global_variable(declaration_t *declaration)
2178 {
2179         ir_type   *global_type = get_glob_type();
2180         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
2181                                   global_type);
2182
2183         ir_entity *entity = declaration->v.entity;
2184         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
2185                 set_entity_visibility(entity, visibility_local);
2186         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
2187                 set_entity_visibility(entity, visibility_external_allocated);
2188         } else {
2189                 set_entity_visibility(entity, visibility_external_visible);
2190         }
2191         current_ir_graph = get_const_code_irg();
2192         create_initializer(declaration);
2193 }
2194
2195 static void context_to_firm(context_t *context)
2196 {
2197         declaration_t *declaration = context->declarations;
2198         for( ; declaration != NULL; declaration = declaration->next) {
2199                 if(declaration->namespace != NAMESPACE_NORMAL)
2200                         continue;
2201                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2202                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2203                         continue;
2204                 if(declaration->symbol == NULL)
2205                         continue;
2206
2207                 type_t *type = declaration->type;
2208                 if(type->type == TYPE_FUNCTION) {
2209                         create_function(declaration);
2210                 } else {
2211                         create_global_variable(declaration);
2212                 }
2213         }
2214 }
2215
2216 void translation_unit_to_firm(translation_unit_t *unit)
2217 {
2218         /* remove me later TODO FIXME */
2219         (void) get_type_size;
2220
2221         /* just to be sure */
2222         continue_label      = NULL;
2223         break_label         = NULL;
2224         current_switch_cond = NULL;
2225
2226         context_to_firm(& unit->context);
2227 }