nsz Git - cparser/blob - ast2firm.c

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