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