nsz Git - cparser/blob - ast2firm.c

   1 #include <config.h>
   2
   3 #define _GNU_SOURCE
   4
   5 #include <assert.h>
   6 #include <string.h>
   7 #include <stdbool.h>
   8
   9 #include <libfirm/firm.h>
  10 #include <libfirm/adt/obst.h>
  11
  12 #include "ast2firm.h"
  13
  14 #include "adt/error.h"
  15 #include "adt/array.h"
  16 #include "token_t.h"
  17 #include "type_t.h"
  18 #include "ast_t.h"
  19 #include "parser.h"
  20
  21 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  22
  23 static ir_type *ir_type_const_char;
  24 static ir_type *ir_type_wchar_t;
  25 static ir_type *ir_type_void;
  26 static ir_type *ir_type_int;
  27
  28 static type_t *type_const_char;
  29 static type_t *type_void;
  30 static type_t *type_int;
  31
  32 static int       next_value_number_function;
  33 static ir_node  *continue_label;
  34 static ir_node  *break_label;
  35 static ir_node  *current_switch_cond;
  36 static bool      saw_default_label;
  37 static ir_node **imature_blocks;
  38
  39 static const declaration_t *current_function_decl;
  40 static ir_node             *current_function_name;
  41
  42 typedef enum declaration_type_t {
  43         DECLARATION_TYPE_UNKNOWN,
  44         DECLARATION_TYPE_FUNCTION,
  45         DECLARATION_TYPE_GLOBAL_VARIABLE,
  46         DECLARATION_TYPE_LOCAL_VARIABLE,
  47         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  48         DECLARATION_TYPE_COMPOUND_MEMBER,
  49         DECLARATION_TYPE_LABEL_BLOCK,
  50         DECLARATION_TYPE_ENUM_ENTRY
  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 }
  91
  92 void exit_ast2firm(void)
  93 {
  94 }
  95
  96 static unsigned unique_id = 0;
  97
  98 static ident *unique_ident(const char *tag)
  99 {
 100         char buf[256];
 101
 102         snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
 103         unique_id++;
 104         return new_id_from_str(buf);
 105 }
 106
 107 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 108 {
 109         switch(atomic_type->atype) {
 110         case ATOMIC_TYPE_SCHAR:
 111         case ATOMIC_TYPE_CHAR:
 112                 return mode_Bs;
 113         case ATOMIC_TYPE_UCHAR:
 114                 return mode_Bu;
 115         case ATOMIC_TYPE_SHORT:
 116                 return mode_Hs;
 117         case ATOMIC_TYPE_USHORT:
 118                 return mode_Hu;
 119         case ATOMIC_TYPE_LONG:
 120         case ATOMIC_TYPE_INT:
 121                 return mode_Is;
 122         case ATOMIC_TYPE_ULONG:
 123         case ATOMIC_TYPE_UINT:
 124                 return mode_Iu;
 125         case ATOMIC_TYPE_LONGLONG:
 126                 return mode_Ls;
 127         case ATOMIC_TYPE_ULONGLONG:
 128                 return mode_Lu;
 129         case ATOMIC_TYPE_FLOAT:
 130                 return mode_F;
 131         case ATOMIC_TYPE_DOUBLE:
 132                 return mode_D;
 133         case ATOMIC_TYPE_LONG_DOUBLE:
 134                 return mode_E;
 135         case ATOMIC_TYPE_BOOL:
 136                 return mode_b;
 137 #ifdef PROVIDE_COMPLEX
 138         case ATOMIC_TYPE_FLOAT_COMPLEX:
 139         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 140         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 141                 panic("complex lowering not implemented yet");
 142                 break;
 143         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 144         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 145         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 146                 panic("imaginary lowering not implemented yet");
 147                 break;
 148 #endif
 149         case ATOMIC_TYPE_VOID:
 150                 /* firm has no real void... */
 151                 return mode_Is;
 152         case ATOMIC_TYPE_INVALID:
 153                 break;
 154         }
 155         panic("Encountered unknown atomic type");
 156 }
 157
 158
 159 static unsigned get_type_size(type_t *type);
 160
 161 static unsigned get_atomic_type_size(const atomic_type_t *type)
 162 {
 163         switch(type->atype) {
 164         case ATOMIC_TYPE_CHAR:
 165         case ATOMIC_TYPE_SCHAR:
 166         case ATOMIC_TYPE_UCHAR:
 167                 return 1;
 168
 169         case ATOMIC_TYPE_SHORT:
 170         case ATOMIC_TYPE_USHORT:
 171                 return 2;
 172
 173         case ATOMIC_TYPE_BOOL:
 174         case ATOMIC_TYPE_INT:
 175         case ATOMIC_TYPE_UINT:
 176         case ATOMIC_TYPE_LONG:
 177         case ATOMIC_TYPE_ULONG:
 178         case ATOMIC_TYPE_FLOAT:
 179                 return 4;
 180
 181         case ATOMIC_TYPE_LONGLONG:
 182         case ATOMIC_TYPE_ULONGLONG:
 183         case ATOMIC_TYPE_DOUBLE:
 184                 return 8;
 185
 186         case ATOMIC_TYPE_LONG_DOUBLE:
 187                 return 12;
 188
 189         case ATOMIC_TYPE_VOID:
 190                 return 1;
 191
 192         case ATOMIC_TYPE_INVALID:
 193                 break;
 194         }
 195         panic("Trying to determine size of invalid atomic type");
 196 }
 197
 198 static unsigned get_compound_type_size(compound_type_t *type)
 199 {
 200         ir_type *irtype = get_ir_type((type_t*) type);
 201         return get_type_size_bytes(irtype);
 202 }
 203
 204 static unsigned get_array_type_size(array_type_t *type)
 205 {
 206         ir_type *irtype = get_ir_type((type_t*) type);
 207         return get_type_size_bytes(irtype);
 208 }
 209
 210 static unsigned get_type_size(type_t *type)
 211 {
 212         type = skip_typeref(type);
 213
 214         switch(type->type) {
 215         case TYPE_ATOMIC:
 216                 return get_atomic_type_size(&type->atomic);
 217         case TYPE_ENUM:
 218                 return get_mode_size_bytes(mode_Is);
 219         case TYPE_COMPOUND_UNION:
 220         case TYPE_COMPOUND_STRUCT:
 221                 return get_compound_type_size(&type->compound);
 222         case TYPE_FUNCTION:
 223                 /* just a pointer to the function */
 224                 return get_mode_size_bytes(mode_P_code);
 225         case TYPE_POINTER:
 226                 return get_mode_size_bytes(mode_P_data);
 227         case TYPE_ARRAY:
 228                 return get_array_type_size(&type->array);
 229         case TYPE_BUILTIN:
 230         case TYPE_TYPEDEF:
 231         case TYPE_TYPEOF:
 232         case TYPE_INVALID:
 233                 break;
 234         }
 235         panic("Trying to determine size of invalid type");
 236 }
 237
 238 static unsigned count_parameters(const function_type_t *function_type)
 239 {
 240         unsigned count = 0;
 241
 242         function_parameter_t *parameter = function_type->parameters;
 243         for ( ; parameter != NULL; parameter = parameter->next) {
 244                 ++count;
 245         }
 246
 247         return count;
 248 }
 249
 250
 251
 252
 253 static long fold_constant(const expression_t *expression);
 254
 255 static ir_type *create_atomic_type(const atomic_type_t *type)
 256 {
 257         ir_mode *mode   = get_atomic_mode(type);
 258         ident   *id     = get_mode_ident(mode);
 259         ir_type *irtype = new_type_primitive(id, mode);
 260
 261         return irtype;
 262 }
 263
 264 static ir_type *create_method_type(const function_type_t *function_type)
 265 {
 266         type_t  *return_type  = function_type->return_type;
 267
 268         ident   *id           = unique_ident("functiontype");
 269         int      n_parameters = count_parameters(function_type);
 270         int      n_results    = return_type == type_void ? 0 : 1;
 271         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 272
 273         if(return_type != type_void) {
 274                 ir_type *restype = get_ir_type(return_type);
 275                 set_method_res_type(irtype, 0, restype);
 276         }
 277
 278         function_parameter_t *parameter = function_type->parameters;
 279         int                   n         = 0;
 280         for( ; parameter != NULL; parameter = parameter->next) {
 281                 ir_type *p_irtype = get_ir_type(parameter->type);
 282                 set_method_param_type(irtype, n, p_irtype);
 283                 ++n;
 284         }
 285
 286         if(function_type->variadic || function_type->unspecified_parameters) {
 287                 set_method_variadicity(irtype, variadicity_variadic);
 288         }
 289
 290         return irtype;
 291 }
 292
 293 static ir_type *create_pointer_type(pointer_type_t *type)
 294 {
 295         type_t  *points_to = type->points_to;
 296         ir_type *ir_points_to;
 297         /* Avoid endless recursion if the points_to type contains this poiner type
 298          * again (might be a struct). We therefore first create a void* pointer
 299          * and then set the real points_to type
 300          */
 301         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 302                                             ir_type_void, mode_P_data);
 303         type->type.firm_type  = ir_type;
 304
 305         ir_points_to = get_ir_type(points_to);
 306         set_pointer_points_to_type(ir_type, ir_points_to);
 307
 308         return ir_type;
 309 }
 310
 311 static ir_type *create_array_type(array_type_t *type)
 312 {
 313         type_t  *element_type    = type->element_type;
 314         ir_type *ir_element_type = get_ir_type(element_type);
 315
 316         ident   *id      = unique_ident("array");
 317         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 318
 319         if(type->size != NULL) {
 320                 int n_elements = fold_constant(type->size);
 321
 322                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 323
 324                 size_t elemsize = get_type_size_bytes(ir_element_type);
 325                 int align = get_type_alignment_bytes(ir_element_type);
 326                 if(elemsize % align > 0) {
 327                         elemsize += align - (elemsize % align);
 328                 }
 329                 set_type_size_bytes(ir_type, n_elements * elemsize);
 330                 set_type_alignment_bytes(ir_type, align);
 331                 set_type_state(ir_type, layout_fixed);
 332         }
 333
 334         return ir_type;
 335 }
 336
 337 #define INVALID_TYPE ((ir_type_ptr)-1)
 338
 339 static ir_type *create_struct_type(compound_type_t *type)
 340 {
 341         symbol_t *symbol = type->declaration->symbol;
 342         ident    *id;
 343         if(symbol != NULL) {
 344                 id = unique_ident(symbol->string);
 345         } else {
 346                 id = unique_ident("__anonymous_struct");
 347         }
 348         ir_type *ir_type = new_type_struct(id);
 349
 350         type->type.firm_type = ir_type;
 351
 352         int align_all = 1;
 353         int offset    = 0;
 354         declaration_t *entry = type->declaration->context.declarations;
 355         for( ; entry != NULL; entry = entry->next) {
 356                 if(entry->namespc != NAMESPACE_NORMAL)
 357                         continue;
 358
 359                 ident       *ident         = new_id_from_str(entry->symbol->string);
 360                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 361
 362                 int entry_size      = get_type_size_bytes(entry_ir_type);
 363                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 364                 int misalign        = offset % entry_alignment;
 365                 if (misalign != 0)
 366                         offset += entry_alignment - misalign;
 367
 368                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 369                 set_entity_offset(entity, offset);
 370                 add_struct_member(ir_type, entity);
 371                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 372                 entry->v.entity         = entity;
 373
 374                 offset += entry_size;
 375                 if(entry_alignment > align_all) {
 376                         if(entry_alignment % align_all != 0) {
 377                                 panic("Uneven alignments not supported yet");
 378                         }
 379                         align_all = entry_alignment;
 380                 }
 381         }
 382
 383         int misalign = offset % align_all;
 384         offset += misalign;
 385         set_type_alignment_bytes(ir_type, align_all);
 386         set_type_size_bytes(ir_type, offset);
 387         set_type_state(ir_type, layout_fixed);
 388
 389         return ir_type;
 390 }
 391
 392 static ir_type *create_union_type(compound_type_t *type)
 393 {
 394         declaration_t *declaration = type->declaration;
 395         symbol_t      *symbol      = declaration->symbol;
 396         ident         *id;
 397         if(symbol != NULL) {
 398                 id = unique_ident(symbol->string);
 399         } else {
 400                 id = unique_ident("__anonymous_union");
 401         }
 402         ir_type  *ir_type = new_type_union(id);
 403
 404         type->type.firm_type = ir_type;
 405
 406         int align_all = 1;
 407         int size      = 0;
 408         declaration_t *entry = declaration->context.declarations;
 409         for( ; entry != NULL; entry = entry->next) {
 410                 if(entry->namespc != NAMESPACE_NORMAL)
 411                         continue;
 412
 413                 ident       *ident         = new_id_from_str(entry->symbol->string);
 414                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 415
 416                 int entry_size      = get_type_size_bytes(entry_ir_type);
 417                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 418
 419                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 420                 add_union_member(ir_type, entity);
 421                 set_entity_offset(entity, 0);
 422                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 423                 entry->v.entity         = entity;
 424
 425                 if(entry_size > size) {
 426                         size = entry_size;
 427                 }
 428                 if(entry_alignment > align_all) {
 429                         if(entry_alignment % align_all != 0) {
 430                                 panic("Uneven alignments not supported yet");
 431                         }
 432                         align_all = entry_alignment;
 433                 }
 434         }
 435
 436         set_type_alignment_bytes(ir_type, align_all);
 437         set_type_size_bytes(ir_type, size);
 438         set_type_state(ir_type, layout_fixed);
 439
 440         return ir_type;
 441 }
 442
 443 static ir_node *expression_to_firm(const expression_t *expression);
 444 static inline ir_mode *get_ir_mode(type_t *type);
 445
 446 static ir_type *create_enum_type(enum_type_t *const type)
 447 {
 448         type->type.firm_type = ir_type_int;
 449
 450         ir_mode *const mode    = get_ir_mode((type_t*) type);
 451         tarval  *const one     = get_mode_one(mode);
 452         tarval  *      tv_next = get_tarval_null(mode);
 453
 454         declaration_t *declaration = type->declaration->next;
 455         for (; declaration != NULL; declaration = declaration->next) {
 456                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 457                         break;
 458
 459                 declaration->declaration_type = DECLARATION_TYPE_ENUM_ENTRY;
 460
 461                 expression_t *const init = declaration->init.enum_value;
 462                 if (init != NULL) {
 463                         ir_node *const cnst = expression_to_firm(init);
 464                         if (!is_Const(cnst)) {
 465                                 panic("couldn't fold constant");
 466                         }
 467                         tv_next = get_Const_tarval(cnst);
 468                 }
 469                 declaration->v.enum_val = tv_next;
 470                 tv_next = tarval_add(tv_next, one);
 471         }
 472
 473         return ir_type_int;
 474 }
 475
 476 static ir_type *get_ir_type(type_t *type)
 477 {
 478         assert(type != NULL);
 479
 480         type = skip_typeref(type);
 481
 482         if(type->base.firm_type != NULL) {
 483                 assert(type->base.firm_type != INVALID_TYPE);
 484                 return type->base.firm_type;
 485         }
 486
 487         ir_type *firm_type = NULL;
 488         switch(type->type) {
 489         case TYPE_ATOMIC:
 490                 firm_type = create_atomic_type(&type->atomic);
 491                 break;
 492         case TYPE_FUNCTION:
 493                 firm_type = create_method_type(&type->function);
 494                 break;
 495         case TYPE_POINTER:
 496                 firm_type = create_pointer_type(&type->pointer);
 497                 break;
 498         case TYPE_ARRAY:
 499                 firm_type = create_array_type(&type->array);
 500                 break;
 501         case TYPE_COMPOUND_STRUCT:
 502                 firm_type = create_struct_type(&type->compound);
 503                 break;
 504         case TYPE_COMPOUND_UNION:
 505                 firm_type = create_union_type(&type->compound);
 506                 break;
 507         case TYPE_ENUM:
 508                 firm_type = create_enum_type(&type->enumt);
 509                 break;
 510         case TYPE_BUILTIN:
 511         case TYPE_TYPEOF:
 512         case TYPE_TYPEDEF:
 513         case TYPE_INVALID:
 514                 break;
 515         }
 516         if(firm_type == NULL)
 517                 panic("unknown type found");
 518
 519         type->base.firm_type = firm_type;
 520         return firm_type;
 521 }
 522
 523 static inline ir_mode *get_ir_mode(type_t *type)
 524 {
 525         ir_type *irtype = get_ir_type(type);
 526
 527         /* firm doesn't report a mode for arrays somehow... */
 528         if(is_Array_type(irtype)) {
 529                 return mode_P;
 530         }
 531
 532         ir_mode *mode = get_type_mode(irtype);
 533         assert(mode != NULL);
 534         return mode;
 535 }
 536
 537 static ir_entity* get_function_entity(declaration_t *declaration)
 538 {
 539         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 540                 return declaration->v.entity;
 541         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 542
 543         symbol_t *symbol = declaration->symbol;
 544         ident    *id     = new_id_from_str(symbol->string);
 545
 546         ir_type  *global_type    = get_glob_type();
 547         ir_type  *ir_type_method = get_ir_type(declaration->type);
 548         assert(is_Method_type(ir_type_method));
 549
 550         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 551         set_entity_ld_ident(entity, id);
 552         if(declaration->storage_class == STORAGE_CLASS_STATIC
 553                         || declaration->is_inline) {
 554                 set_entity_visibility(entity, visibility_local);
 555         } else if(declaration->init.statement != NULL) {
 556                 set_entity_visibility(entity, visibility_external_visible);
 557         } else {
 558                 set_entity_visibility(entity, visibility_external_allocated);
 559         }
 560
 561         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 562         declaration->v.entity         = entity;
 563
 564         return entity;
 565 }
 566
 567 static dbg_info *get_dbg_info(const source_position_t *pos)
 568 {
 569         return (dbg_info*) pos;
 570 }
 571
 572 static ir_node *const_to_firm(const const_expression_t *cnst)
 573 {
 574         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 575         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 576
 577         char    buf[128];
 578         tarval *tv;
 579         size_t  len;
 580         if(mode_is_float(mode)) {
 581                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 582         } else {
 583                 if(mode_is_signed(mode)) {
 584                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
 585                 } else {
 586                         len = snprintf(buf, sizeof(buf), "%llu",
 587                                        (unsigned long long) cnst->v.int_value);
 588                 }
 589                 tv = new_tarval_from_str(buf, len, mode);
 590         }
 591
 592         return new_d_Const(dbgi, mode, tv);
 593 }
 594
 595 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 596 {
 597         assert(entity != NULL);
 598         union symconst_symbol sym;
 599         sym.entity_p = entity;
 600         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 601 }
 602
 603 static ir_node *string_to_firm(const source_position_t *const src_pos,
 604                                const char *const id_prefix,
 605                                const char *const string)
 606 {
 607         ir_type *const global_type = get_glob_type();
 608         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 609                                                     ir_type_const_char);
 610
 611         ident     *const id     = unique_ident(id_prefix);
 612         ir_entity *const entity = new_entity(global_type, id, type);
 613         set_entity_ld_ident(entity, id);
 614         set_entity_variability(entity, variability_constant);
 615
 616         ir_type *const elem_type = ir_type_const_char;
 617         ir_mode *const mode      = get_type_mode(elem_type);
 618
 619         const size_t slen = strlen(string) + 1;
 620
 621         set_array_lower_bound_int(type, 0, 0);
 622         set_array_upper_bound_int(type, 0, slen);
 623         set_type_size_bytes(type, slen);
 624         set_type_state(type, layout_fixed);
 625
 626         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 627         for(size_t i = 0; i < slen; ++i) {
 628                 tvs[i] = new_tarval_from_long(string[i], mode);
 629         }
 630
 631         set_array_entity_values(entity, tvs, slen);
 632         free(tvs);
 633
 634         dbg_info *const dbgi = get_dbg_info(src_pos);
 635
 636         return create_symconst(dbgi, entity);
 637 }
 638
 639 static ir_node *string_literal_to_firm(
 640                 const string_literal_expression_t* literal)
 641 {
 642         return string_to_firm(&literal->expression.source_position, "Lstr",
 643                               literal->value);
 644 }
 645
 646 static ir_node *wide_string_literal_to_firm(
 647         const wide_string_literal_expression_t* const literal)
 648 {
 649         ir_type *const global_type = get_glob_type();
 650         ir_type *const elem_type   = ir_type_wchar_t;
 651         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 652                                                     elem_type);
 653
 654         ident     *const id     = unique_ident("Lstr");
 655         ir_entity *const entity = new_entity(global_type, id, type);
 656         set_entity_ld_ident(entity, id);
 657         set_entity_variability(entity, variability_constant);
 658
 659         ir_mode *const mode      = get_type_mode(elem_type);
 660
 661         const wchar_rep_t *const string = literal->value.begin;
 662         const size_t             slen   = literal->value.size;
 663
 664         set_array_lower_bound_int(type, 0, 0);
 665         set_array_upper_bound_int(type, 0, slen);
 666         set_type_size_bytes(type, slen);
 667         set_type_state(type, layout_fixed);
 668
 669         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 670         for(size_t i = 0; i < slen; ++i) {
 671                 tvs[i] = new_tarval_from_long(string[i], mode);
 672         }
 673
 674         set_array_entity_values(entity, tvs, slen);
 675         free(tvs);
 676
 677         dbg_info *const dbgi = get_dbg_info(&literal->expression.source_position);
 678
 679         return create_symconst(dbgi, entity);
 680 }
 681
 682 static ir_node *deref_address(ir_type *const irtype, ir_node *const addr,
 683                               dbg_info *const dbgi)
 684 {
 685         if(is_compound_type(irtype) || is_Array_type(irtype)) {
 686                 return addr;
 687         }
 688
 689         ir_mode *const mode     = get_type_mode(irtype);
 690         ir_node *const memory   = get_store();
 691         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
 692         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 693         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
 694         set_store(load_mem);
 695         return load_res;
 696 }
 697
 698 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
 699 {
 700         ir_mode *mode = get_irn_mode(node);
 701
 702         if(!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
 703                 return node;
 704         if(!mode_is_float(mode))
 705                 return node;
 706
 707         /* check if there is already a Conv */
 708         if (get_irn_op(node) == op_Conv) {
 709                 /* convert it into a strict Conv */
 710                 set_Conv_strict(node, 1);
 711                 return node;
 712         }
 713
 714         /* otherwise create a new one */
 715         return new_d_strictConv(dbgi, node, mode);
 716 }
 717
 718 static ir_node *get_global_var_address(dbg_info *const dbgi,
 719                                        const declaration_t *const decl)
 720 {
 721         assert(decl->declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
 722
 723         ir_entity *const entity = decl->v.entity;
 724         switch ((storage_class_tag_t)decl->storage_class) {
 725                 case STORAGE_CLASS_THREAD:
 726                 case STORAGE_CLASS_THREAD_EXTERN:
 727                 case STORAGE_CLASS_THREAD_STATIC: {
 728                         ir_node *const no_mem = new_NoMem();
 729                         ir_node *const tls    = get_irg_tls(current_ir_graph);
 730                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
 731                 }
 732
 733                 default:
 734                         return create_symconst(dbgi, entity);
 735         }
 736 }
 737
 738 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 739 {
 740         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 741         declaration_t *declaration = ref->declaration;
 742         type_t        *type        = skip_typeref(declaration->type);
 743
 744         switch((declaration_type_t) declaration->declaration_type) {
 745         case DECLARATION_TYPE_UNKNOWN:
 746                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
 747                         break;
 748                 }
 749                 get_ir_type(type);
 750                 /* FALLTHROUGH */
 751
 752         case DECLARATION_TYPE_ENUM_ENTRY: {
 753                 ir_mode *const mode = get_ir_mode(type);
 754                 return new_Const(mode, declaration->v.enum_val);
 755         }
 756
 757         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 758                 ir_mode *mode = get_ir_mode(type);
 759                 return get_value(declaration->v.value_number, mode);
 760         }
 761         case DECLARATION_TYPE_FUNCTION: {
 762                 return create_symconst(dbgi, declaration->v.entity);
 763         }
 764         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 765                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
 766                 ir_type *const irtype = get_entity_type(declaration->v.entity);
 767                 return deref_address(irtype, addr, dbgi);
 768         }
 769
 770         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 771                 ir_entity *entity = declaration->v.entity;
 772                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 773                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 774                 ir_type   *irtype = get_entity_type(entity);
 775                 return deref_address(irtype, sel, dbgi);
 776         }
 777
 778         case DECLARATION_TYPE_COMPOUND_MEMBER:
 779         case DECLARATION_TYPE_LABEL_BLOCK:
 780                 panic("not implemented reference type");
 781         }
 782
 783         panic("reference to declaration with unknown type found");
 784 }
 785
 786 static ir_node *reference_addr(const reference_expression_t *ref)
 787 {
 788         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 789         declaration_t *declaration = ref->declaration;
 790
 791         switch((declaration_type_t) declaration->declaration_type) {
 792         case DECLARATION_TYPE_UNKNOWN:
 793                 break;
 794         case DECLARATION_TYPE_LOCAL_VARIABLE:
 795                 panic("local variable without entity has no address");
 796         case DECLARATION_TYPE_FUNCTION: {
 797                 return create_symconst(dbgi, declaration->v.entity);
 798         }
 799         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 800                 ir_node *const addr = get_global_var_address(dbgi, declaration);
 801                 return addr;
 802         }
 803         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 804                 ir_entity *entity = declaration->v.entity;
 805                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 806                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 807
 808                 return sel;
 809         }
 810
 811         case DECLARATION_TYPE_ENUM_ENTRY:
 812                 panic("trying to reference enum entry");
 813
 814         case DECLARATION_TYPE_COMPOUND_MEMBER:
 815         case DECLARATION_TYPE_LABEL_BLOCK:
 816                 panic("not implemented reference type");
 817         }
 818
 819         panic("reference to declaration with unknown type found");
 820 }
 821
 822 static ir_node *process_builtin_call(const call_expression_t *call)
 823 {
 824         dbg_info *dbgi = get_dbg_info(&call->expression.source_position);
 825
 826         assert(call->function->type == EXPR_BUILTIN_SYMBOL);
 827         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
 828
 829         type_t *type = skip_typeref(builtin->expression.datatype);
 830         assert(is_type_pointer(type));
 831
 832         type_t   *function_type = skip_typeref(type->pointer.points_to);
 833         symbol_t *symbol        = builtin->symbol;
 834
 835         switch(symbol->ID) {
 836         case T___builtin_alloca: {
 837                 if(call->arguments == NULL || call->arguments->next != NULL) {
 838                         panic("invalid number of parameters on __builtin_alloca");
 839                 }
 840                 expression_t *argument = call->arguments->expression;
 841                 ir_node      *size     = expression_to_firm(argument);
 842
 843                 ir_node *store  = get_store();
 844                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
 845                                               stack_alloc);
 846                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
 847                 set_store(proj_m);
 848                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
 849
 850                 return res;
 851         }
 852         case T___builtin_nan:
 853         case T___builtin_nanf:
 854         case T___builtin_nand: {
 855                 /* Ignore string for now... */
 856                 assert(is_type_function(function_type));
 857                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
 858                 tarval  *tv   = get_mode_NAN(mode);
 859                 ir_node *res  = new_d_Const(dbgi, mode, tv);
 860                 return res;
 861         }
 862         default:
 863                 panic("Unsupported builtin found\n");
 864         }
 865 }
 866
 867 static ir_node *call_expression_to_firm(const call_expression_t *call)
 868 {
 869         assert(get_cur_block() != NULL);
 870
 871         expression_t *function = call->function;
 872         if(function->type == EXPR_BUILTIN_SYMBOL) {
 873                 return process_builtin_call(call);
 874         }
 875         ir_node *callee = expression_to_firm(function);
 876
 877         type_t *type = skip_typeref(function->base.datatype);
 878         assert(is_type_pointer(type));
 879         pointer_type_t *pointer_type = &type->pointer;
 880         type_t         *points_to    = skip_typeref(pointer_type->points_to);
 881         assert(is_type_function(points_to));
 882         function_type_t *function_type = &points_to->function;
 883
 884         int              n_parameters = 0;
 885         call_argument_t *argument     = call->arguments;
 886         for( ; argument != NULL; argument = argument->next) {
 887                 ++n_parameters;
 888         }
 889
 890         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 891
 892         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 893         ir_type *new_method_type = NULL;
 894         if(function_type->variadic || function_type->unspecified_parameters) {
 895                 /* we need to construct a new method type matching the call
 896                  * arguments... */
 897                 int n_res       = get_method_n_ress(ir_method_type);
 898                 new_method_type = new_type_method(unique_ident("calltype"),
 899                                                   n_parameters, n_res);
 900                 set_method_calling_convention(new_method_type,
 901                                get_method_calling_convention(ir_method_type));
 902                 set_method_additional_properties(new_method_type,
 903                                get_method_additional_properties(ir_method_type));
 904
 905                 for(int i = 0; i < n_res; ++i) {
 906                         set_method_res_type(new_method_type, i,
 907                                             get_method_res_type(ir_method_type, i));
 908                 }
 909         }
 910         ir_node *in[n_parameters];
 911
 912         argument = call->arguments;
 913         int n = 0;
 914         for( ; argument != NULL; argument = argument->next) {
 915                 expression_t *expression = argument->expression;
 916                 ir_node      *arg_node   = expression_to_firm(expression);
 917
 918                 arg_node = do_strict_conv(dbgi, arg_node);
 919
 920                 in[n] = arg_node;
 921                 if(new_method_type != NULL) {
 922                         ir_type *irtype = get_ir_type(expression->base.datatype);
 923                         set_method_param_type(new_method_type, n, irtype);
 924                 }
 925
 926                 n++;
 927         }
 928         assert(n == n_parameters);
 929
 930         if(new_method_type != NULL)
 931                 ir_method_type = new_method_type;
 932
 933         ir_node  *store = get_store();
 934         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 935                                      ir_method_type);
 936         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 937         set_store(mem);
 938
 939         type_t  *return_type = skip_typeref(function_type->return_type);
 940         ir_node *result      = NULL;
 941
 942         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
 943                 ir_mode *mode;
 944                 if(is_type_scalar(return_type)) {
 945                         mode = get_ir_mode(return_type);
 946                 } else {
 947                         mode = mode_P_data;
 948                 }
 949                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 950                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 951         }
 952
 953         return result;
 954 }
 955
 956 static void statement_to_firm(statement_t *statement);
 957 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
 958
 959 static ir_node *expression_to_addr(const expression_t *expression);
 960 static void create_condition_evaluation(const expression_t *expression,
 961                                         ir_node *true_block,
 962                                         ir_node *false_block);
 963
 964 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
 965                          ir_node *value)
 966 {
 967         value = do_strict_conv(dbgi, value);
 968
 969         ir_node  *memory = get_store();
 970
 971         if(is_type_scalar(type)) {
 972                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 973                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 974                 set_store(store_mem);
 975         } else {
 976                 ir_type *irtype    = get_ir_type(type);
 977                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
 978                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
 979                 set_store(copyb_mem);
 980         }
 981 }
 982
 983 static void set_value_for_expression(const expression_t *expression,
 984                                      ir_node *value)
 985 {
 986         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
 987         value          = do_strict_conv(dbgi, value);
 988
 989         if(expression->type == EXPR_REFERENCE) {
 990                 reference_expression_t *ref = (reference_expression_t*) expression;
 991
 992                 declaration_t *declaration = ref->declaration;
 993                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 994                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 995                         set_value(declaration->v.value_number, value);
 996                         return;
 997                 }
 998         }
 999
1000         ir_node *addr = expression_to_addr(expression);
1001         type_t  *type = skip_typeref(expression->base.datatype);
1002         assign_value(dbgi, addr, type, value);
1003 }
1004
1005 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1006 {
1007         ir_mode *value_mode = get_irn_mode(value);
1008
1009         if (value_mode == dest_mode || is_Bad(value))
1010                 return value;
1011
1012         if(dest_mode == mode_b) {
1013                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1014                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1015                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1016                 return proj;
1017         }
1018
1019         return new_d_Conv(dbgi, value, dest_mode);
1020 }
1021
1022 static ir_node *create_incdec(const unary_expression_t *expression)
1023 {
1024         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
1025         type_t       *type  = skip_typeref(expression->expression.datatype);
1026         ir_mode      *mode  = get_ir_mode(type);
1027         expression_t *value = expression->value;
1028
1029         ir_node *value_node = expression_to_firm(value);
1030
1031         ir_node *offset;
1032         if(is_type_pointer(type)) {
1033                 pointer_type_t *pointer_type = &type->pointer;
1034                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
1035                 offset = new_Const_long(mode_Is, elem_size);
1036         } else {
1037                 assert(is_type_arithmetic(type));
1038                 offset = new_Const(mode, get_mode_one(mode));
1039         }
1040
1041         switch(expression->type) {
1042         case UNEXPR_POSTFIX_INCREMENT: {
1043                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1044                 set_value_for_expression(value, new_value);
1045                 return value_node;
1046         }
1047         case UNEXPR_POSTFIX_DECREMENT: {
1048                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1049                 set_value_for_expression(value, new_value);
1050                 return value_node;
1051         }
1052         case UNEXPR_PREFIX_INCREMENT: {
1053                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1054                 set_value_for_expression(value, new_value);
1055                 return new_value;
1056         }
1057         case UNEXPR_PREFIX_DECREMENT: {
1058                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1059                 set_value_for_expression(value, new_value);
1060                 return new_value;
1061         }
1062         default:
1063                 panic("no incdec expr in create_incdec");
1064                 return NULL;
1065         }
1066 }
1067
1068 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1069 {
1070         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1071         type_t   *type = skip_typeref(expression->expression.datatype);
1072         ir_mode  *mode = get_ir_mode(type);
1073
1074         if(expression->type == UNEXPR_TAKE_ADDRESS)
1075                 return expression_to_addr(expression->value);
1076
1077         const expression_t *value      = expression->value;
1078         ir_node            *value_node = expression_to_firm(value);
1079
1080         switch(expression->type) {
1081         case UNEXPR_NEGATE:
1082                 return new_d_Minus(dbgi, value_node, mode);
1083         case UNEXPR_PLUS:
1084                 return value_node;
1085         case UNEXPR_BITWISE_NEGATE:
1086                 return new_d_Not(dbgi, value_node, mode);
1087         case UNEXPR_NOT: {
1088                 if(get_irn_mode(value_node) != mode_b) {
1089                         value_node = create_conv(dbgi, value_node, mode_b);
1090                 }
1091                 value_node = new_d_Not(dbgi, value_node, mode_b);
1092                 if(mode != mode_b) {
1093                         value_node = create_conv(dbgi, value_node, mode);
1094                 }
1095                 return value_node;
1096         }
1097         case UNEXPR_DEREFERENCE: {
1098                 type_t  *value_type = skip_typeref(value->base.datatype);
1099                 ir_type *irtype     = get_ir_type(value_type);
1100                 assert(is_Pointer_type(irtype));
1101                 ir_type *points_to  = get_pointer_points_to_type(irtype);
1102                 return deref_address(points_to, value_node, dbgi);
1103         }
1104         case UNEXPR_POSTFIX_INCREMENT:
1105         case UNEXPR_POSTFIX_DECREMENT:
1106         case UNEXPR_PREFIX_INCREMENT:
1107         case UNEXPR_PREFIX_DECREMENT:
1108                 return create_incdec(expression);
1109         case UNEXPR_CAST: {
1110                 ir_node *node = create_conv(dbgi, value_node, get_ir_mode(type));
1111                 node = do_strict_conv(dbgi, node);
1112                 return node;
1113         }
1114         case UNEXPR_CAST_IMPLICIT:
1115                 return create_conv(dbgi, value_node, get_ir_mode(type));
1116
1117         case UNEXPR_TAKE_ADDRESS:
1118         case UNEXPR_INVALID:
1119                 break;
1120         }
1121         panic("invalid UNEXPR type found");
1122 }
1123
1124 static long get_pnc(binary_expression_type_t type)
1125 {
1126         switch(type) {
1127         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
1128         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
1129         case BINEXPR_LESS:         return pn_Cmp_Lt;
1130         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
1131         case BINEXPR_GREATER:      return pn_Cmp_Gt;
1132         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
1133         default:
1134                 break;
1135         }
1136         panic("trying to get pn_Cmp from non-comparison binexpr type");
1137 }
1138
1139 static ir_node *create_lazy_op(const binary_expression_t *expression)
1140 {
1141         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1142         type_t   *type = expression->expression.datatype;
1143         ir_mode  *mode = get_ir_mode(type);
1144
1145         ir_node *cur_block = get_cur_block();
1146
1147         ir_node *one_block = new_immBlock();
1148         ir_node *one       = new_Const(mode, get_mode_one(mode));
1149         ir_node *jmp_one   = new_d_Jmp(dbgi);
1150
1151         ir_node *zero_block = new_immBlock();
1152         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1153         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1154
1155         set_cur_block(cur_block);
1156         create_condition_evaluation((const expression_t*) expression,
1157                                     one_block, zero_block);
1158         mature_immBlock(one_block);
1159         mature_immBlock(zero_block);
1160
1161         ir_node *common_block = new_immBlock();
1162         add_immBlock_pred(common_block, jmp_one);
1163         add_immBlock_pred(common_block, jmp_zero);
1164         mature_immBlock(common_block);
1165
1166         ir_node *in[2] = { one, zero };
1167         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1168
1169         return val;
1170 }
1171
1172 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1173                                             ir_node *right, ir_mode *mode);
1174
1175 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1176                                         create_arithmetic_func func)
1177 {
1178         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1179         ir_node  *left  = expression_to_firm(expression->left);
1180         ir_node  *right = expression_to_firm(expression->right);
1181         type_t   *type  = expression->right->base.datatype;
1182         /* be careful with the modes, because in arithmetic assign nodes only
1183          * the right operand has the mode of the arithmetic already */
1184         ir_mode  *mode  = get_ir_mode(type);
1185         left            = create_conv(dbgi, left, mode);
1186         ir_node  *res   = func(dbgi, left, right, mode);
1187
1188         return res;
1189 }
1190
1191 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1192                                    ir_node  *      integer,
1193                                    type_t   *const type,
1194                                    dbg_info *const dbgi,
1195                                    const create_arithmetic_func func)
1196 {
1197         pointer_type_t *const pointer_type = (pointer_type_t*)type;
1198         type_t         *const points_to    = pointer_type->points_to;
1199         const unsigned        elem_size    = get_type_size(points_to);
1200
1201         assert(elem_size >= 1);
1202         if (elem_size > 1) {
1203                 integer             = create_conv(dbgi, integer, mode_Is);
1204                 ir_node *const cnst = new_Const_long(mode_Is, (long)elem_size);
1205                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
1206                 integer = mul;
1207         }
1208
1209         ir_mode *const mode = get_ir_mode(type);
1210         return func(dbgi, pointer, integer, mode);
1211 }
1212
1213 static ir_node *create_arithmetic_assign_binop(
1214                 const binary_expression_t *expression, create_arithmetic_func func)
1215 {
1216         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1217         type_t   *const type = skip_typeref(expression->expression.datatype);
1218         ir_node  *value;
1219
1220         if (is_type_pointer(type)) {
1221                 ir_node        *const pointer = expression_to_firm(expression->left);
1222                 ir_node        *      integer = expression_to_firm(expression->right);
1223                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1224         } else {
1225                 value = create_arithmetic_binop(expression, func);
1226         }
1227
1228         ir_mode  *const mode = get_ir_mode(type);
1229         value = create_conv(dbgi, value, mode);
1230         set_value_for_expression(expression->left, value);
1231
1232         return value;
1233 }
1234
1235 static ir_node *create_add(const binary_expression_t *expression)
1236 {
1237         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1238         ir_node  *left  = expression_to_firm(expression->left);
1239         ir_node  *right = expression_to_firm(expression->right);
1240         type_t   *type  = expression->expression.datatype;
1241
1242         expression_t *expr_left  = expression->left;
1243         expression_t *expr_right = expression->right;
1244         type_t       *type_left  = skip_typeref(expr_left->base.datatype);
1245         type_t       *type_right = skip_typeref(expr_right->base.datatype);
1246
1247         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1248                 ir_mode *const mode = get_ir_mode(type);
1249                 return new_d_Add(dbgi, left, right, mode);
1250         }
1251
1252         if (is_type_pointer(type_left)) {
1253                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1254         } else {
1255                 assert(is_type_pointer(type_right));
1256                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1257         }
1258 }
1259
1260 static ir_node *create_sub(const binary_expression_t *expression)
1261 {
1262         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1263         expression_t *const expr_left  = expression->left;
1264         expression_t *const expr_right = expression->right;
1265         ir_node      *const left       = expression_to_firm(expr_left);
1266         ir_node      *const right      = expression_to_firm(expr_right);
1267         type_t       *const type       = expression->expression.datatype;
1268         type_t       *const type_left  = skip_typeref(expr_left->base.datatype);
1269         type_t       *const type_right = skip_typeref(expr_right->base.datatype);
1270
1271         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1272                 ir_mode *const mode = get_ir_mode(type);
1273                 return new_d_Sub(dbgi, left, right, mode);
1274         } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
1275                 const pointer_type_t *const ptr_type = &type_left->pointer;
1276                 const unsigned elem_size             = get_type_size(ptr_type->points_to);
1277                 ir_mode *const mode   = get_ir_mode(type);
1278                 ir_node *const sub    = new_d_Sub(dbgi, left, right, mode);
1279                 ir_node *const cnst   = new_Const_long(mode_Is, (long)elem_size);
1280                 ir_node *const no_mem = new_NoMem();
1281                 ir_node *const div    = new_d_Div(dbgi, no_mem, sub, cnst, mode,
1282                                                   op_pin_state_floats);
1283                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
1284         }
1285
1286         assert(is_type_pointer(type_left));
1287         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1288 }
1289
1290 static ir_node *create_shift(const binary_expression_t *expression)
1291 {
1292         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1293         ir_node  *left  = expression_to_firm(expression->left);
1294         ir_node  *right = expression_to_firm(expression->right);
1295         type_t   *type  = expression->expression.datatype;
1296         ir_mode  *mode  = get_ir_mode(type);
1297
1298         /* firm always wants the shift count to be unsigned */
1299         right = create_conv(dbgi, right, mode_Iu);
1300
1301         ir_node *res;
1302
1303         switch(expression->type) {
1304         case BINEXPR_SHIFTLEFT_ASSIGN:
1305         case BINEXPR_SHIFTLEFT:
1306                 res = new_d_Shl(dbgi, left, right, mode);
1307                 break;
1308         case BINEXPR_SHIFTRIGHT_ASSIGN:
1309         case BINEXPR_SHIFTRIGHT: {
1310                  expression_t *expr_left = expression->left;
1311                  type_t       *type_left = skip_typeref(expr_left->base.datatype);
1312
1313                  if(is_type_signed(type_left)) {
1314                         res = new_d_Shrs(dbgi, left, right, mode);
1315                  } else {
1316                          res = new_d_Shr(dbgi, left, right, mode);
1317                  }
1318                  break;
1319         }
1320         default:
1321                 panic("create shift op called for non-shift op");
1322         }
1323
1324         return res;
1325 }
1326
1327
1328 static ir_node *create_divmod(const binary_expression_t *expression)
1329 {
1330         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1331         ir_node  *left  = expression_to_firm(expression->left);
1332         ir_node  *right = expression_to_firm(expression->right);
1333         ir_node  *pin   = new_Pin(new_NoMem());
1334         /* be careful with the modes, because in arithmetic assign nodes only
1335          * the right operand has the mode of the arithmetic already */
1336         type_t   *type  = expression->right->base.datatype;
1337         ir_mode  *mode  = get_ir_mode(type);
1338         left            = create_conv(dbgi, left, mode);
1339         ir_node  *op;
1340         ir_node  *res;
1341
1342         switch (expression->type)  {
1343                 case BINEXPR_DIV:
1344                 case BINEXPR_DIV_ASSIGN:
1345                         if(mode_is_float(mode)) {
1346                                 op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1347                                 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1348                         } else {
1349                                 op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1350                                 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1351                         }
1352                         break;
1353
1354                 case BINEXPR_MOD:
1355                 case BINEXPR_MOD_ASSIGN:
1356                         assert(!mode_is_float(mode));
1357                         op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1358                         res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1359                         break;
1360
1361                 default: panic("unexpected binary expression type in create_divmod()");
1362         }
1363
1364         return res;
1365 }
1366
1367 static ir_node *create_arithmetic_assign_divmod(
1368                 const binary_expression_t *expression)
1369 {
1370         ir_node  *      value = create_divmod(expression);
1371         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1372         type_t   *const type  = expression->expression.datatype;
1373         ir_mode  *const mode  = get_ir_mode(type);
1374
1375         assert(type->type != TYPE_POINTER);
1376
1377         value = create_conv(dbgi, value, mode);
1378         set_value_for_expression(expression->left, value);
1379
1380         return value;
1381 }
1382
1383 static ir_node *create_arithmetic_assign_shift(
1384                 const binary_expression_t *expression)
1385 {
1386         ir_node  *      value = create_shift(expression);
1387         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1388         type_t   *const type  = expression->expression.datatype;
1389         ir_mode  *const mode  = get_ir_mode(type);
1390
1391         value = create_conv(dbgi, value, mode);
1392         set_value_for_expression(expression->left, value);
1393
1394         return value;
1395 }
1396
1397 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1398 {
1399         binary_expression_type_t type = expression->type;
1400         switch(type) {
1401         case BINEXPR_EQUAL:
1402         case BINEXPR_NOTEQUAL:
1403         case BINEXPR_LESS:
1404         case BINEXPR_LESSEQUAL:
1405         case BINEXPR_GREATER:
1406         case BINEXPR_GREATEREQUAL: {
1407                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1408                 ir_node *left  = expression_to_firm(expression->left);
1409                 ir_node *right = expression_to_firm(expression->right);
1410                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1411                 long     pnc   = get_pnc(type);
1412                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1413                 return proj;
1414         }
1415         case BINEXPR_ASSIGN: {
1416                 ir_node *right = expression_to_firm(expression->right);
1417                 set_value_for_expression(expression->left, right);
1418
1419                 return right;
1420         }
1421         case BINEXPR_ADD:
1422                 return create_add(expression);
1423         case BINEXPR_SUB:
1424                 return create_sub(expression);
1425         case BINEXPR_MUL:
1426                 return create_arithmetic_binop(expression, new_d_Mul);
1427         case BINEXPR_BITWISE_AND:
1428                 return create_arithmetic_binop(expression, new_d_And);
1429         case BINEXPR_BITWISE_OR:
1430                 return create_arithmetic_binop(expression, new_d_Or);
1431         case BINEXPR_BITWISE_XOR:
1432                 return create_arithmetic_binop(expression, new_d_Eor);
1433         case BINEXPR_SHIFTLEFT:
1434         case BINEXPR_SHIFTRIGHT:
1435                 return create_shift(expression);
1436         case BINEXPR_DIV:
1437         case BINEXPR_MOD:
1438                 return create_divmod(expression);
1439         case BINEXPR_LOGICAL_AND:
1440         case BINEXPR_LOGICAL_OR:
1441                 return create_lazy_op(expression);
1442         case BINEXPR_COMMA:
1443                 expression_to_firm(expression->left);
1444                 return expression_to_firm(expression->right);
1445         case BINEXPR_ADD_ASSIGN:
1446                 return create_arithmetic_assign_binop(expression, new_d_Add);
1447         case BINEXPR_SUB_ASSIGN:
1448                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1449         case BINEXPR_MUL_ASSIGN:
1450                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1451         case BINEXPR_DIV_ASSIGN:
1452                 return create_arithmetic_assign_divmod(expression);
1453         case BINEXPR_BITWISE_AND_ASSIGN:
1454                 return create_arithmetic_assign_binop(expression, new_d_And);
1455         case BINEXPR_BITWISE_OR_ASSIGN:
1456                 return create_arithmetic_assign_binop(expression, new_d_Or);
1457         case BINEXPR_BITWISE_XOR_ASSIGN:
1458                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1459         case BINEXPR_SHIFTLEFT_ASSIGN:
1460         case BINEXPR_SHIFTRIGHT_ASSIGN:
1461                 return create_arithmetic_assign_shift(expression);
1462         default:
1463                 panic("TODO binexpr type");
1464         }
1465 }
1466
1467 static ir_node *array_access_addr(const array_access_expression_t *expression)
1468 {
1469         dbg_info *dbgi      = get_dbg_info(&expression->expression.source_position);
1470         ir_node  *base_addr = expression_to_firm(expression->array_ref);
1471         ir_node  *offset    = expression_to_firm(expression->index);
1472         offset              = create_conv(dbgi, offset, mode_Iu);
1473
1474         type_t *ref_type = skip_typeref(expression->array_ref->base.datatype);
1475         assert(is_type_pointer(ref_type));
1476         pointer_type_t *pointer_type = (pointer_type_t*) ref_type;
1477
1478         unsigned elem_size       = get_type_size(pointer_type->points_to);
1479         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1480         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1481                                              mode_Iu);
1482         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1483
1484         return result;
1485 }
1486
1487 static ir_node *array_access_to_firm(
1488                 const array_access_expression_t *expression)
1489 {
1490         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1491         ir_node  *addr   = array_access_addr(expression);
1492         type_t   *type   = revert_automatic_type_conversion(
1493                         (const expression_t*) expression);
1494         type             = skip_typeref(type);
1495         ir_type  *irtype = get_ir_type(type);
1496
1497         return deref_address(irtype, addr, dbgi);
1498 }
1499
1500 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1501 {
1502         type_t *type = expression->type;
1503         if(type == NULL) {
1504                 type = expression->size_expression->base.datatype;
1505                 assert(type != NULL);
1506         }
1507
1508         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1509         unsigned  size      = get_type_size(type);
1510         ir_node  *size_node = new_Const_long(mode, size);
1511
1512         return size_node;
1513 }
1514
1515 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1516 {
1517         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1518
1519         ir_node *cur_block   = get_cur_block();
1520
1521         /* create the true block */
1522         ir_node *true_block  = new_immBlock();
1523
1524         ir_node *true_val = expression_to_firm(expression->true_expression);
1525         ir_node *true_jmp = new_Jmp();
1526
1527         /* create the false block */
1528         ir_node *false_block = new_immBlock();
1529
1530         ir_node *false_val = expression_to_firm(expression->false_expression);
1531         ir_node *false_jmp = new_Jmp();
1532
1533         /* create the condition evaluation */
1534         set_cur_block(cur_block);
1535         create_condition_evaluation(expression->condition, true_block, false_block);
1536         mature_immBlock(true_block);
1537         mature_immBlock(false_block);
1538
1539         /* create the common block */
1540         ir_node *common_block = new_immBlock();
1541         add_immBlock_pred(common_block, true_jmp);
1542         add_immBlock_pred(common_block, false_jmp);
1543         mature_immBlock(common_block);
1544
1545         /* TODO improve static semantics, so either both or no values are NULL */
1546         if (true_val == NULL || false_val == NULL)
1547                 return NULL;
1548
1549         ir_node *in[2] = { true_val, false_val };
1550         ir_mode *mode  = get_irn_mode(true_val);
1551         assert(get_irn_mode(false_val) == mode);
1552         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1553
1554         return val;
1555 }
1556
1557 static ir_node *select_addr(const select_expression_t *expression)
1558 {
1559         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1560
1561         ir_node *compound_addr = expression_to_firm(expression->compound);
1562
1563         declaration_t *entry = expression->compound_entry;
1564         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1565         ir_entity     *entity = entry->v.entity;
1566
1567         assert(entity != NULL);
1568
1569         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1570
1571         return sel;
1572 }
1573
1574 static ir_node *select_to_firm(const select_expression_t *expression)
1575 {
1576         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1577         ir_node  *addr   = select_addr(expression);
1578         type_t   *type   = revert_automatic_type_conversion(
1579                         (const expression_t*) expression);
1580         type             = skip_typeref(type);
1581         ir_type  *irtype = get_ir_type(type);
1582
1583         return deref_address(irtype, addr, dbgi);
1584 }
1585
1586 /* Values returned by __builtin_classify_type. */
1587 typedef enum gcc_type_class
1588 {
1589         no_type_class = -1,
1590         void_type_class,
1591         integer_type_class,
1592         char_type_class,
1593         enumeral_type_class,
1594         boolean_type_class,
1595         pointer_type_class,
1596         reference_type_class,
1597         offset_type_class,
1598         real_type_class,
1599         complex_type_class,
1600         function_type_class,
1601         method_type_class,
1602         record_type_class,
1603         union_type_class,
1604         array_type_class,
1605         string_type_class,
1606         set_type_class,
1607         file_type_class,
1608         lang_type_class
1609 } gcc_type_class;
1610
1611 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
1612 {
1613         const type_t *const type = expr->type_expression->base.datatype;
1614
1615         gcc_type_class tc;
1616         switch (type->type)
1617         {
1618                 case TYPE_ATOMIC: {
1619                         const atomic_type_t *const atomic_type = &type->atomic;
1620                         switch (atomic_type->atype) {
1621                                 // should not be reached
1622                                 case ATOMIC_TYPE_INVALID:
1623                                         tc = no_type_class;
1624                                         break;
1625
1626                                 // gcc cannot do that
1627                                 case ATOMIC_TYPE_VOID:
1628                                         tc = void_type_class;
1629                                         break;
1630
1631                                 case ATOMIC_TYPE_CHAR:      // gcc handles this as integer
1632                                 case ATOMIC_TYPE_SCHAR:     // gcc handles this as integer
1633                                 case ATOMIC_TYPE_UCHAR:     // gcc handles this as integer
1634                                 case ATOMIC_TYPE_SHORT:
1635                                 case ATOMIC_TYPE_USHORT:
1636                                 case ATOMIC_TYPE_INT:
1637                                 case ATOMIC_TYPE_UINT:
1638                                 case ATOMIC_TYPE_LONG:
1639                                 case ATOMIC_TYPE_ULONG:
1640                                 case ATOMIC_TYPE_LONGLONG:
1641                                 case ATOMIC_TYPE_ULONGLONG:
1642                                 case ATOMIC_TYPE_BOOL:      // gcc handles this as integer
1643                                         tc = integer_type_class;
1644                                         break;
1645
1646                                 case ATOMIC_TYPE_FLOAT:
1647                                 case ATOMIC_TYPE_DOUBLE:
1648                                 case ATOMIC_TYPE_LONG_DOUBLE:
1649                                         tc = real_type_class;
1650                                         break;
1651
1652 #ifdef PROVIDE_COMPLEX
1653                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
1654                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
1655                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
1656                                         tc = complex_type_class;
1657                                         break;
1658                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
1659                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
1660                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
1661                                         tc = complex_type_class;
1662                                         break;
1663 #endif
1664
1665                                 default:
1666                                         panic("Unimplemented case in classify_type_to_firm().");
1667                         }
1668                         break;
1669                 }
1670
1671                 case TYPE_ARRAY:           // gcc handles this as pointer
1672                 case TYPE_FUNCTION:        // gcc handles this as pointer
1673                 case TYPE_POINTER:         tc = pointer_type_class; break;
1674                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
1675                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
1676
1677                 // gcc handles this as integer
1678                 case TYPE_ENUM:            tc = integer_type_class; break;
1679
1680                 default:
1681                         panic("Unimplemented case in classify_type_to_firm().");
1682         }
1683
1684         dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
1685         ir_mode  *const mode = mode_Is;
1686         tarval   *const tv   = new_tarval_from_long(tc, mode);
1687         return new_d_Const(dbgi, mode, tv);
1688 }
1689
1690 static ir_node *function_name_to_firm(
1691                 const string_literal_expression_t *const expr)
1692 {
1693         if (current_function_name == NULL) {
1694                 const source_position_t *const src_pos =
1695                         &expr->expression.source_position;
1696                 const char *const name = current_function_decl->symbol->string;
1697                 current_function_name = string_to_firm(src_pos, "__func__", name);
1698         }
1699
1700         return current_function_name;
1701 }
1702
1703 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
1704 {
1705         statement_t *statement = expr->statement;
1706
1707         assert(statement->type == STATEMENT_COMPOUND);
1708         return compound_statement_to_firm((compound_statement_t*) statement);
1709 }
1710
1711 static ir_node *dereference_addr(const unary_expression_t *const expression)
1712 {
1713         assert(expression->type == UNEXPR_DEREFERENCE);
1714         return expression_to_firm(expression->value);
1715 }
1716
1717 static ir_node *expression_to_addr(const expression_t *expression)
1718 {
1719         switch(expression->type) {
1720         case EXPR_REFERENCE:
1721                 return reference_addr(&expression->reference);
1722         case EXPR_ARRAY_ACCESS:
1723                 return array_access_addr(&expression->array_access);
1724         case EXPR_SELECT:
1725                 return select_addr(&expression->select);
1726         case EXPR_CALL:
1727                 return call_expression_to_firm(&expression->call);
1728         case EXPR_UNARY: {
1729                 const unary_expression_t *const unary_expr = &expression->unary;
1730                 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1731                         return dereference_addr(unary_expr);
1732                 }
1733                 break;
1734         }
1735         default:
1736                 break;
1737         }
1738         panic("trying to get address of non-lvalue");
1739 }
1740
1741 static ir_node *_expression_to_firm(const expression_t *expression)
1742 {
1743         switch(expression->type) {
1744         case EXPR_CONST:
1745                 return const_to_firm(&expression->conste);
1746         case EXPR_STRING_LITERAL:
1747                 return string_literal_to_firm(&expression->string);
1748         case EXPR_WIDE_STRING_LITERAL:
1749                 return wide_string_literal_to_firm(&expression->wide_string);
1750         case EXPR_REFERENCE:
1751                 return reference_expression_to_firm(&expression->reference);
1752         case EXPR_CALL:
1753                 return call_expression_to_firm(&expression->call);
1754         case EXPR_UNARY:
1755                 return unary_expression_to_firm(&expression->unary);
1756         case EXPR_BINARY:
1757                 return binary_expression_to_firm(&expression->binary);
1758         case EXPR_ARRAY_ACCESS:
1759                 return array_access_to_firm(&expression->array_access);
1760         case EXPR_SIZEOF:
1761                 return sizeof_to_firm(&expression->sizeofe);
1762         case EXPR_CONDITIONAL:
1763                 return conditional_to_firm(&expression->conditional);
1764         case EXPR_SELECT:
1765                 return select_to_firm(&expression->select);
1766         case EXPR_CLASSIFY_TYPE:
1767                 return classify_type_to_firm(&expression->classify_type);
1768         case EXPR_FUNCTION:
1769         case EXPR_PRETTY_FUNCTION:
1770                 return function_name_to_firm(&expression->string);
1771         case EXPR_STATEMENT:
1772                 return statement_expression_to_firm(&expression->statement);
1773         case EXPR_OFFSETOF:
1774         case EXPR_VA_ARG:
1775         case EXPR_BUILTIN_SYMBOL:
1776                 panic("unimplemented expression found");
1777
1778         case EXPR_UNKNOWN:
1779         case EXPR_INVALID:
1780                 break;
1781         }
1782         panic("invalid expression found");
1783 }
1784
1785 static ir_node *expression_to_firm(const expression_t *expression)
1786 {
1787         ir_node *res = _expression_to_firm(expression);
1788
1789         if(res != NULL && get_irn_mode(res) == mode_b) {
1790                 ir_mode *mode = get_ir_mode(expression->base.datatype);
1791                 res           = create_conv(NULL, res, mode);
1792         }
1793
1794         return res;
1795 }
1796
1797 static ir_node *expression_to_modeb(const expression_t *expression)
1798 {
1799         ir_node *res = _expression_to_firm(expression);
1800         res          = create_conv(NULL, res, mode_b);
1801
1802         return res;
1803 }
1804
1805 /**
1806  * create a short-circuit expression evaluation that tries to construct
1807  * efficient control flow structures for &&, || and ! expressions
1808  */
1809 static void create_condition_evaluation(const expression_t *expression,
1810                                         ir_node *true_block,
1811                                         ir_node *false_block)
1812 {
1813         switch(expression->type) {
1814         case EXPR_UNARY: {
1815                 unary_expression_t *unary_expression = (unary_expression_t*) expression;
1816                 if(unary_expression->type == UNEXPR_NOT) {
1817                         create_condition_evaluation(unary_expression->value, false_block,
1818                                                     true_block);
1819                         return;
1820                 }
1821                 break;
1822         }
1823         case EXPR_BINARY: {
1824                 binary_expression_t *binary_expression
1825                         = (binary_expression_t*) expression;
1826                 if(binary_expression->type == BINEXPR_LOGICAL_AND) {
1827                         ir_node *cur_block   = get_cur_block();
1828                         ir_node *extra_block = new_immBlock();
1829                         set_cur_block(cur_block);
1830                         create_condition_evaluation(binary_expression->left, extra_block,
1831                                                     false_block);
1832                         mature_immBlock(extra_block);
1833                         set_cur_block(extra_block);
1834                         create_condition_evaluation(binary_expression->right, true_block,
1835                                                     false_block);
1836                         return;
1837                 }
1838                 if(binary_expression->type == BINEXPR_LOGICAL_OR) {
1839                         ir_node *cur_block   = get_cur_block();
1840                         ir_node *extra_block = new_immBlock();
1841                         set_cur_block(cur_block);
1842                         create_condition_evaluation(binary_expression->left, true_block,
1843                                                     extra_block);
1844                         mature_immBlock(extra_block);
1845                         set_cur_block(extra_block);
1846                         create_condition_evaluation(binary_expression->right, true_block,
1847                                                     false_block);
1848                         return;
1849                 }
1850                 break;
1851         }
1852         default:
1853                 break;
1854         }
1855
1856         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
1857         ir_node  *condition  = expression_to_modeb(expression);
1858         ir_node  *cond       = new_d_Cond(dbgi, condition);
1859         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1860         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1861
1862         add_immBlock_pred(true_block, true_proj);
1863         add_immBlock_pred(false_block, false_proj);
1864
1865         set_cur_block(NULL);
1866 }
1867
1868 static void return_statement_to_firm(return_statement_t *statement)
1869 {
1870         if(get_cur_block() == NULL)
1871                 return;
1872
1873         ir_type *func_irtype = get_ir_type(current_function_decl->type);
1874
1875         dbg_info *dbgi  = get_dbg_info(&statement->statement.source_position);
1876
1877         ir_node *in[1];
1878         int      in_len;
1879         if(get_method_n_ress(func_irtype) > 0) {
1880                 ir_type *res_type = get_method_res_type(func_irtype, 0);
1881
1882                 if(statement->return_value != NULL) {
1883                         ir_node *node = expression_to_firm(statement->return_value);
1884                         node  = do_strict_conv(dbgi, node);
1885                         in[0] = node;
1886                 } else {
1887                         ir_mode *mode;
1888                         if(is_compound_type(res_type)) {
1889                                 mode = mode_P_data;
1890                         } else {
1891                                 mode = get_type_mode(res_type);
1892                         }
1893                         in[0] = new_Unknown(mode);
1894                 }
1895                 in_len = 1;
1896         } else {
1897                 /* build return_value for its side effects */
1898                 if(statement->return_value != NULL) {
1899                         expression_to_firm(statement->return_value);
1900                 }
1901                 in_len = 0;
1902         }
1903
1904         ir_node  *store = get_store();
1905         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
1906
1907         ir_node *end_block = get_irg_end_block(current_ir_graph);
1908         add_immBlock_pred(end_block, ret);
1909
1910         set_cur_block(NULL);
1911 }
1912
1913 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
1914 {
1915         if(get_cur_block() == NULL)
1916                 return NULL;
1917
1918         return expression_to_firm(statement->expression);
1919 }
1920
1921 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
1922 {
1923         ir_node     *result    = NULL;
1924         statement_t *statement = compound->statements;
1925         for( ; statement != NULL; statement = statement->base.next) {
1926                 //context2firm(&statement->context);
1927
1928                 if(statement->base.next == NULL
1929                                 && statement->type == STATEMENT_EXPRESSION) {
1930                         result = expression_statement_to_firm(
1931                                         (expression_statement_t*) statement);
1932                         break;
1933                 }
1934                 statement_to_firm(statement);
1935         }
1936
1937         return result;
1938 }
1939
1940 static void if_statement_to_firm(if_statement_t *statement)
1941 {
1942         ir_node *cur_block = get_cur_block();
1943
1944         ir_node *fallthrough_block = new_immBlock();
1945
1946         /* the true (blocks) */
1947         ir_node *true_block;
1948         if (statement->true_statement != NULL) {
1949                 true_block = new_immBlock();
1950                 statement_to_firm(statement->true_statement);
1951                 if(get_cur_block() != NULL) {
1952                         ir_node *jmp = new_Jmp();
1953                         add_immBlock_pred(fallthrough_block, jmp);
1954                 }
1955         } else {
1956                 true_block = fallthrough_block;
1957         }
1958
1959         /* the false (blocks) */
1960         ir_node *false_block;
1961         if(statement->false_statement != NULL) {
1962                 false_block = new_immBlock();
1963
1964                 statement_to_firm(statement->false_statement);
1965                 if(get_cur_block() != NULL) {
1966                         ir_node *jmp = new_Jmp();
1967                         add_immBlock_pred(fallthrough_block, jmp);
1968                 }
1969         } else {
1970                 false_block = fallthrough_block;
1971         }
1972
1973         /* create the condition */
1974         if(cur_block != NULL) {
1975                 set_cur_block(cur_block);
1976                 create_condition_evaluation(statement->condition, true_block,
1977                                             false_block);
1978         }
1979
1980         mature_immBlock(true_block);
1981         if(false_block != fallthrough_block) {
1982                 mature_immBlock(false_block);
1983         }
1984         mature_immBlock(fallthrough_block);
1985
1986         set_cur_block(fallthrough_block);
1987 }
1988
1989 static void while_statement_to_firm(while_statement_t *statement)
1990 {
1991         ir_node *jmp = NULL;
1992         if(get_cur_block() != NULL) {
1993                 jmp = new_Jmp();
1994         }
1995
1996         /* create the header block */
1997         ir_node *header_block = new_immBlock();
1998         if(jmp != NULL) {
1999                 add_immBlock_pred(header_block, jmp);
2000         }
2001
2002         /* the false block */
2003         ir_node *false_block = new_immBlock();
2004
2005         /* the loop body */
2006         ir_node *body_block;
2007         if (statement->body != NULL) {
2008                 ir_node *old_continue_label = continue_label;
2009                 ir_node *old_break_label    = break_label;
2010                 continue_label              = header_block;
2011                 break_label                 = false_block;
2012
2013                 body_block = new_immBlock();
2014                 statement_to_firm(statement->body);
2015
2016                 assert(continue_label == header_block);
2017                 assert(break_label    == false_block);
2018                 continue_label = old_continue_label;
2019                 break_label    = old_break_label;
2020
2021                 if(get_cur_block() != NULL) {
2022                         jmp = new_Jmp();
2023                         add_immBlock_pred(header_block, jmp);
2024                 }
2025         } else {
2026                 body_block = header_block;
2027         }
2028
2029         /* create the condition */
2030         set_cur_block(header_block);
2031
2032         create_condition_evaluation(statement->condition, body_block, false_block);
2033         mature_immBlock(body_block);
2034         mature_immBlock(false_block);
2035         mature_immBlock(header_block);
2036
2037         set_cur_block(false_block);
2038 }
2039
2040 static void do_while_statement_to_firm(do_while_statement_t *statement)
2041 {
2042         ir_node *jmp = NULL;
2043         if(get_cur_block() != NULL) {
2044                 jmp = new_Jmp();
2045         }
2046
2047         /* create the header block */
2048         ir_node *header_block = new_immBlock();
2049
2050         /* the false block */
2051         ir_node *false_block = new_immBlock();
2052
2053         /* the loop body */
2054         ir_node *body_block = new_immBlock();
2055         if(jmp != NULL) {
2056                 add_immBlock_pred(body_block, jmp);
2057         }
2058
2059         if (statement->body != NULL) {
2060                 ir_node *old_continue_label = continue_label;
2061                 ir_node *old_break_label    = break_label;
2062                 continue_label              = header_block;
2063                 break_label                 = false_block;
2064
2065                 statement_to_firm(statement->body);
2066
2067                 assert(continue_label == header_block);
2068                 assert(break_label    == false_block);
2069                 continue_label = old_continue_label;
2070                 break_label    = old_break_label;
2071
2072                 if (get_cur_block() == NULL) {
2073                         mature_immBlock(header_block);
2074                         mature_immBlock(body_block);
2075                         mature_immBlock(false_block);
2076                         return;
2077                 }
2078         }
2079
2080         ir_node *body_jmp = new_Jmp();
2081         add_immBlock_pred(header_block, body_jmp);
2082         mature_immBlock(header_block);
2083
2084         /* create the condition */
2085         set_cur_block(header_block);
2086
2087         create_condition_evaluation(statement->condition, body_block, false_block);
2088         mature_immBlock(body_block);
2089         mature_immBlock(false_block);
2090         mature_immBlock(header_block);
2091
2092         set_cur_block(false_block);
2093 }
2094
2095 static void for_statement_to_firm(for_statement_t *statement)
2096 {
2097         ir_node *jmp = NULL;
2098         if (get_cur_block() != NULL) {
2099                 if(statement->initialisation != NULL) {
2100                         expression_to_firm(statement->initialisation);
2101                 }
2102                 jmp = new_Jmp();
2103         }
2104
2105         /* create the step block */
2106         ir_node *const step_block = new_immBlock();
2107         if (statement->step != NULL) {
2108                 expression_to_firm(statement->step);
2109         }
2110         ir_node *const step_jmp = new_Jmp();
2111
2112         /* create the header block */
2113         ir_node *const header_block = new_immBlock();
2114         if (jmp != NULL) {
2115                 add_immBlock_pred(header_block, jmp);
2116         }
2117         add_immBlock_pred(header_block, step_jmp);
2118
2119         /* the false block */
2120         ir_node *const false_block = new_immBlock();
2121
2122         /* the loop body */
2123         ir_node * body_block;
2124         if (statement->body != NULL) {
2125                 ir_node *const old_continue_label = continue_label;
2126                 ir_node *const old_break_label    = break_label;
2127                 continue_label = step_block;
2128                 break_label    = false_block;
2129
2130                 body_block = new_immBlock();
2131                 statement_to_firm(statement->body);
2132
2133                 assert(continue_label == step_block);
2134                 assert(break_label    == false_block);
2135                 continue_label = old_continue_label;
2136                 break_label    = old_break_label;
2137
2138                 if (get_cur_block() != NULL) {
2139                         jmp = new_Jmp();
2140                         add_immBlock_pred(step_block, jmp);
2141                 }
2142         } else {
2143                 body_block = step_block;
2144         }
2145
2146         /* create the condition */
2147         set_cur_block(header_block);
2148         if (statement->condition != NULL) {
2149                 create_condition_evaluation(statement->condition, body_block,
2150                                             false_block);
2151         } else {
2152                 keep_alive(header_block);
2153                 jmp = new_Jmp();
2154                 add_immBlock_pred(body_block, jmp);
2155         }
2156
2157         mature_immBlock(body_block);
2158         mature_immBlock(false_block);
2159         mature_immBlock(step_block);
2160         mature_immBlock(header_block);
2161         mature_immBlock(false_block);
2162
2163         set_cur_block(false_block);
2164 }
2165
2166 static void create_declaration_entity(declaration_t *declaration,
2167                                       declaration_type_t declaration_type,
2168                                       ir_type *parent_type)
2169 {
2170         ident     *id     = new_id_from_str(declaration->symbol->string);
2171         ir_type   *irtype = get_ir_type(declaration->type);
2172         ir_entity *entity = new_entity(parent_type, id, irtype);
2173         set_entity_ld_ident(entity, id);
2174
2175         declaration->declaration_type = (unsigned char) declaration_type;
2176         declaration->v.entity         = entity;
2177         set_entity_variability(entity, variability_uninitialized);
2178         /* TODO: visibility? */
2179 }
2180
2181 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
2182
2183 enum compound_graph_entry_type_t {
2184         COMPOUND_GRAPH_ENTRY_ARRAY,
2185         COMPOUND_GRAPH_ENTRY_COMPOUND
2186 };
2187
2188 struct compound_graph_path_entry_t {
2189         int type;
2190         union {
2191                 ir_entity *entity;
2192                 int        array_index;
2193         } v;
2194         compound_graph_path_entry_t *prev;
2195 };
2196
2197 static void create_initializer_object(initializer_t *initializer, type_t *type,
2198                 ir_entity *entity, compound_graph_path_entry_t *entry, int len);
2199
2200 static compound_graph_path *create_compound_path(ir_type *type,
2201                 compound_graph_path_entry_t *entry, int len)
2202 {
2203         compound_graph_path *path = new_compound_graph_path(type, len);
2204
2205         int i = len - 1;
2206         for( ; entry != NULL; entry = entry->prev, --i) {
2207                 assert(i >= 0);
2208                 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
2209                         set_compound_graph_path_node(path, i, entry->v.entity);
2210                 } else {
2211                         assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
2212                         set_compound_graph_path_array_index(path, i, entry->v.array_index);
2213                 }
2214         }
2215         assert(i == -1);
2216
2217         return path;
2218 }
2219
2220 static void create_initializer_value(initializer_value_t *initializer,
2221                                      ir_entity *entity,
2222                                      compound_graph_path_entry_t *entry,
2223                                      int len)
2224 {
2225         ir_node             *node = expression_to_firm(initializer->value);
2226         ir_type             *type = get_entity_type(entity);
2227         compound_graph_path *path = create_compound_path(type, entry, len);
2228         add_compound_ent_value_w_path(entity, node, path);
2229 }
2230
2231 static void create_initializer_compound(initializer_list_t *initializer,
2232                                         compound_type_t *type,
2233                                         ir_entity *entity,
2234                                         compound_graph_path_entry_t *last_entry,
2235                                         int len)
2236 {
2237         declaration_t *compound_declaration = type->declaration;
2238
2239         declaration_t *compound_entry = compound_declaration->context.declarations;
2240
2241         compound_graph_path_entry_t entry;
2242         entry.type = COMPOUND_GRAPH_ENTRY_COMPOUND;
2243         entry.prev = last_entry;
2244         ++len;
2245
2246         size_t i = 0;
2247         for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
2248                 if(compound_entry->symbol == NULL)
2249                         continue;
2250                 if(compound_entry->namespc != NAMESPACE_NORMAL)
2251                         continue;
2252
2253                 if(i >= initializer->len)
2254                         break;
2255
2256                 entry.v.entity = compound_entry->v.entity;
2257
2258                 initializer_t *sub_initializer = initializer->initializers[i];
2259
2260                 assert(compound_entry != NULL);
2261                 assert(compound_entry->declaration_type
2262                                 == DECLARATION_TYPE_COMPOUND_MEMBER);
2263
2264                 if(sub_initializer->type == INITIALIZER_VALUE) {
2265                         create_initializer_value(&sub_initializer->value,
2266                                                  entity, &entry, len);
2267                 } else {
2268                         type_t *entry_type = skip_typeref(compound_entry->type);
2269                         create_initializer_object(sub_initializer, entry_type, entity,
2270                                                   &entry, len);
2271                 }
2272
2273                 ++i;
2274         }
2275 }
2276
2277 static void create_initializer_array(initializer_list_t *initializer,
2278                                      array_type_t *type, ir_entity *entity,
2279                                      compound_graph_path_entry_t *last_entry,
2280                                      int len)
2281 {
2282         type_t *element_type = type->element_type;
2283         element_type         = skip_typeref(element_type);
2284
2285         compound_graph_path_entry_t entry;
2286         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2287         entry.prev = last_entry;
2288         ++len;
2289
2290         size_t i;
2291         for(i = 0; i < initializer->len; ++i) {
2292                 entry.v.array_index = i;
2293
2294                 initializer_t *sub_initializer = initializer->initializers[i];
2295
2296                 if(sub_initializer->type == INITIALIZER_VALUE) {
2297                         create_initializer_value(&sub_initializer->value,
2298                                                  entity, &entry, len);
2299                 } else {
2300                         create_initializer_object(sub_initializer, element_type, entity,
2301                                                   &entry, len);
2302                 }
2303         }
2304
2305 #if 0
2306         /* TODO: initialize rest... */
2307         if(type->size_expression != NULL) {
2308                 size_t array_len = fold_constant(type->size_expression);
2309                 for( ; i < array_len; ++i) {
2310
2311                 }
2312         }
2313 #endif
2314 }
2315
2316 static void create_initializer_string(initializer_string_t *initializer,
2317                                       array_type_t *type, ir_entity *entity,
2318                                       compound_graph_path_entry_t *last_entry,
2319                                       int len)
2320 {
2321         type_t *element_type = type->element_type;
2322         element_type         = skip_typeref(element_type);
2323
2324         compound_graph_path_entry_t entry;
2325         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2326         entry.prev = last_entry;
2327         ++len;
2328
2329         ir_type    *irtype  = get_entity_type(entity);
2330         size_t      arr_len = get_array_type_size(type);
2331         const char *p       = initializer->string;
2332         size_t      i       = 0;
2333         for(i = 0; i < arr_len; ++i, ++p) {
2334                 entry.v.array_index = i;
2335
2336                 ir_node             *node = new_Const_long(mode_Bs, *p);
2337                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2338                 add_compound_ent_value_w_path(entity, node, path);
2339
2340                 if(*p == '\0')
2341                         break;
2342         }
2343 }
2344
2345 static void create_initializer_object(initializer_t *initializer, type_t *type,
2346                 ir_entity *entity, compound_graph_path_entry_t *entry, int len)
2347 {
2348         if(is_type_array(type)) {
2349                 array_type_t *array_type = &type->array;
2350
2351                 if(initializer->type == INITIALIZER_STRING) {
2352                         initializer_string_t *string = &initializer->string;
2353                         create_initializer_string(string, array_type, entity, entry, len);
2354                 } else {
2355                         assert(initializer->type == INITIALIZER_LIST);
2356                         initializer_list_t *list = &initializer->list;
2357                         create_initializer_array(list, array_type, entity, entry, len);
2358                 }
2359         } else {
2360                 assert(initializer->type == INITIALIZER_LIST);
2361                 initializer_list_t *list = &initializer->list;
2362
2363                 assert(is_type_compound(type));
2364                 compound_type_t *compound_type = &type->compound;
2365                 create_initializer_compound(list, compound_type, entity, entry, len);
2366         }
2367 }
2368
2369 static void create_initializer_local_variable_entity(declaration_t *declaration)
2370 {
2371         initializer_t *initializer = declaration->init.initializer;
2372         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
2373         ir_entity     *entity      = declaration->v.entity;
2374         ir_node       *memory      = get_store();
2375         ir_node       *nomem       = new_NoMem();
2376         ir_node       *frame       = get_irg_frame(current_ir_graph);
2377         ir_node       *addr        = new_d_simpleSel(dbgi, nomem, frame, entity);
2378
2379         if(initializer->type == INITIALIZER_VALUE) {
2380                 initializer_value_t *initializer_value = &initializer->value;
2381
2382                 ir_node *value = expression_to_firm(initializer_value->value);
2383                 type_t  *type  = skip_typeref(declaration->type);
2384                 assign_value(dbgi, addr, type, value);
2385                 return;
2386         }
2387
2388         /* create a "template" entity which is copied to the entity on the stack */
2389         ident     *id          = unique_ident("initializer");
2390         ir_type   *irtype      = get_ir_type(declaration->type);
2391         ir_type   *global_type = get_glob_type();
2392         ir_entity *init_entity = new_entity(global_type, id, irtype);
2393         set_entity_ld_ident(init_entity, id);
2394
2395         set_entity_variability(init_entity, variability_initialized);
2396         set_entity_visibility(init_entity, visibility_local);
2397
2398         ir_graph *old_current_ir_graph = current_ir_graph;
2399         current_ir_graph = get_const_code_irg();
2400
2401         type_t *type = skip_typeref(declaration->type);
2402         create_initializer_object(initializer, type, init_entity, NULL, 0);
2403
2404         assert(current_ir_graph == get_const_code_irg());
2405         current_ir_graph = old_current_ir_graph;
2406
2407         ir_node *src_addr  = create_symconst(dbgi, init_entity);
2408         ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
2409
2410         ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
2411         set_store(copyb_mem);
2412 }
2413
2414 static void create_initializer(declaration_t *declaration)
2415 {
2416         initializer_t *initializer = declaration->init.initializer;
2417         if(initializer == NULL)
2418                 return;
2419
2420         declaration_type_t declaration_type
2421                 = (declaration_type_t) declaration->declaration_type;
2422         if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY) {
2423                 create_initializer_local_variable_entity(declaration);
2424                 return;
2425         }
2426
2427         if(initializer->type == INITIALIZER_VALUE) {
2428                 initializer_value_t *initializer_value = &initializer->value;
2429
2430                 ir_node *value = expression_to_firm(initializer_value->value);
2431
2432                 if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
2433                         set_value(declaration->v.value_number, value);
2434                 } else {
2435                         assert(declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2436
2437                         ir_entity *entity = declaration->v.entity;
2438
2439                         set_entity_variability(entity, variability_initialized);
2440                         set_atomic_ent_value(entity, value);
2441                 }
2442         } else {
2443                 assert(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY
2444                                 || declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2445
2446                 ir_entity *entity = declaration->v.entity;
2447                 set_entity_variability(entity, variability_initialized);
2448
2449                 type_t *type = skip_typeref(declaration->type);
2450                 create_initializer_object(initializer, type, entity, NULL, 0);
2451         }
2452 }
2453
2454 static void create_local_variable(declaration_t *declaration)
2455 {
2456         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2457
2458         bool needs_entity = declaration->address_taken;
2459         type_t *type = skip_typeref(declaration->type);
2460
2461         if(is_type_array(type) || is_type_compound(type)) {
2462                 needs_entity = true;
2463         }
2464
2465         if(needs_entity) {
2466                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2467                 create_declaration_entity(declaration,
2468                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
2469                                           frame_type);
2470         } else {
2471                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2472                 declaration->v.value_number   = next_value_number_function;
2473                 ++next_value_number_function;
2474         }
2475
2476         create_initializer(declaration);
2477 }
2478
2479 static void create_local_static_variable(declaration_t *declaration)
2480 {
2481         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2482
2483         type_t    *type        = skip_typeref(declaration->type);
2484         ir_type   *global_type = get_glob_type();
2485         ident     *id          = unique_ident(declaration->symbol->string);
2486         ir_type   *irtype      = get_ir_type(type);
2487         ir_entity *entity      = new_entity(global_type, id, irtype);
2488         set_entity_ld_ident(entity, id);
2489
2490         declaration->declaration_type = DECLARATION_TYPE_GLOBAL_VARIABLE;
2491         declaration->v.entity         = entity;
2492         set_entity_variability(entity, variability_uninitialized);
2493         set_entity_visibility(entity, visibility_local);
2494
2495         ir_graph *old_current_ir_graph = current_ir_graph;
2496         current_ir_graph = get_const_code_irg();
2497
2498         create_initializer(declaration);
2499
2500         assert(current_ir_graph == get_const_code_irg());
2501         current_ir_graph = old_current_ir_graph;
2502 }
2503
2504 static void declaration_statement_to_firm(declaration_statement_t *statement)
2505 {
2506         declaration_t *declaration = statement->declarations_begin;
2507         declaration_t *end         = statement->declarations_end->next;
2508         for( ; declaration != end; declaration = declaration->next) {
2509                 type_t *type = skip_typeref(declaration->type);
2510
2511                 switch ((storage_class_tag_t) declaration->storage_class) {
2512                 case STORAGE_CLASS_TYPEDEF:
2513                         continue;
2514                 case STORAGE_CLASS_STATIC:
2515                         create_local_static_variable(declaration);
2516                         continue;
2517                 case STORAGE_CLASS_ENUM_ENTRY:
2518                         panic("enum entry declaration in local block found");
2519                 case STORAGE_CLASS_EXTERN:
2520                         panic("extern declaration in local block found");
2521                 case STORAGE_CLASS_NONE:
2522                 case STORAGE_CLASS_AUTO:
2523                 case STORAGE_CLASS_REGISTER:
2524                         if(is_type_function(type)) {
2525                                 panic("nested functions not supported yet");
2526                         } else {
2527                                 create_local_variable(declaration);
2528                         }
2529                         continue;
2530                 case STORAGE_CLASS_THREAD:
2531                 case STORAGE_CLASS_THREAD_EXTERN:
2532                 case STORAGE_CLASS_THREAD_STATIC:
2533                         break;
2534                 }
2535                 panic("invalid storage class found");
2536         }
2537 }
2538
2539 static void create_jump_statement(const statement_t *statement,
2540                                   ir_node *target_block)
2541 {
2542         if(get_cur_block() == NULL)
2543                 return;
2544
2545         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
2546         ir_node  *jump = new_d_Jmp(dbgi);
2547         add_immBlock_pred(target_block, jump);
2548
2549         set_cur_block(NULL);
2550 }
2551
2552 static void switch_statement_to_firm(const switch_statement_t *statement)
2553 {
2554         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2555
2556         ir_node *expression  = expression_to_firm(statement->expression);
2557         ir_node *cond        = new_d_Cond(dbgi, expression);
2558         ir_node *break_block = new_immBlock();
2559
2560         set_cur_block(NULL);
2561
2562         ir_node *const old_switch_cond       = current_switch_cond;
2563         ir_node *const old_break_label       = break_label;
2564         const bool     old_saw_default_label = saw_default_label;
2565         current_switch_cond                  = cond;
2566         break_label                          = break_block;
2567
2568         statement_to_firm(statement->body);
2569
2570         if(get_cur_block() != NULL) {
2571                 ir_node *jmp = new_Jmp();
2572                 add_immBlock_pred(break_block, jmp);
2573         }
2574
2575         if (!saw_default_label) {
2576                 set_cur_block(get_nodes_block(cond));
2577                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
2578                                                         MAGIC_DEFAULT_PN_NUMBER);
2579                 add_immBlock_pred(break_block, proj);
2580         }
2581
2582         assert(current_switch_cond == cond);
2583         assert(break_label         == break_block);
2584         current_switch_cond = old_switch_cond;
2585         break_label         = old_break_label;
2586         saw_default_label   = old_saw_default_label;
2587
2588         mature_immBlock(break_block);
2589         set_cur_block(break_block);
2590 }
2591
2592 static long fold_constant(const expression_t *expression)
2593 {
2594         ir_graph *old_current_ir_graph = current_ir_graph;
2595         current_ir_graph = get_const_code_irg();
2596
2597         ir_node *cnst = expression_to_firm(expression);
2598         if(!is_Const(cnst)) {
2599                 panic("couldn't fold constantl");
2600         }
2601         tarval *tv = get_Const_tarval(cnst);
2602         if(!tarval_is_long(tv)) {
2603                 panic("folded constant not an integer");
2604         }
2605
2606         long res = get_tarval_long(tv);
2607
2608         current_ir_graph = old_current_ir_graph;
2609         return res;
2610 }
2611
2612 static void case_label_to_firm(const case_label_statement_t *statement)
2613 {
2614         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2615
2616         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
2617
2618         /* let's create a node and hope firm constant folding creates a Const
2619          * node... */
2620         ir_node *proj;
2621         set_cur_block(get_nodes_block(current_switch_cond));
2622         if(statement->expression) {
2623                 long pn = fold_constant(statement->expression);
2624                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
2625                         /* oops someone detected our cheating... */
2626                         panic("magic default pn used");
2627                 }
2628                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
2629         } else {
2630                 saw_default_label = true;
2631                 proj = new_d_defaultProj(dbgi, current_switch_cond,
2632                                          MAGIC_DEFAULT_PN_NUMBER);
2633         }
2634
2635         ir_node *block = new_immBlock();
2636         if (fallthrough != NULL) {
2637                 add_immBlock_pred(block, fallthrough);
2638         }
2639         add_immBlock_pred(block, proj);
2640         mature_immBlock(block);
2641
2642         statement_to_firm(statement->label_statement);
2643 }
2644
2645 static ir_node *get_label_block(declaration_t *label)
2646 {
2647         assert(label->namespc == NAMESPACE_LABEL);
2648
2649         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
2650                 return label->v.block;
2651         }
2652         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
2653
2654         ir_node *old_cur_block = get_cur_block();
2655         ir_node *block         = new_immBlock();
2656         set_cur_block(old_cur_block);
2657
2658         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
2659         label->v.block          = block;
2660
2661         ARR_APP1(ir_node *, imature_blocks, block);
2662
2663         return block;
2664 }
2665
2666 static void label_to_firm(const label_statement_t *statement)
2667 {
2668         ir_node *block = get_label_block(statement->label);
2669
2670         if(get_cur_block() != NULL) {
2671                 ir_node *jmp = new_Jmp();
2672                 add_immBlock_pred(block, jmp);
2673         }
2674
2675         set_cur_block(block);
2676         keep_alive(block);
2677
2678         statement_to_firm(statement->label_statement);
2679 }
2680
2681 static void goto_to_firm(const goto_statement_t *statement)
2682 {
2683         if(get_cur_block() == NULL)
2684                 return;
2685
2686         ir_node *block = get_label_block(statement->label);
2687         ir_node *jmp   = new_Jmp();
2688         add_immBlock_pred(block, jmp);
2689
2690         set_cur_block(NULL);
2691 }
2692
2693 static void statement_to_firm(statement_t *statement)
2694 {
2695         switch(statement->type) {
2696         case STATEMENT_INVALID:
2697                 panic("invalid statement found");
2698         case STATEMENT_COMPOUND:
2699                 compound_statement_to_firm(&statement->compound);
2700                 return;
2701         case STATEMENT_RETURN:
2702                 return_statement_to_firm(&statement->returns);
2703                 return;
2704         case STATEMENT_EXPRESSION:
2705                 expression_statement_to_firm(&statement->expression);
2706                 return;
2707         case STATEMENT_IF:
2708                 if_statement_to_firm(&statement->ifs);
2709                 return;
2710         case STATEMENT_WHILE:
2711                 while_statement_to_firm(&statement->whiles);
2712                 return;
2713         case STATEMENT_DO_WHILE:
2714                 do_while_statement_to_firm(&statement->do_while);
2715                 return;
2716         case STATEMENT_DECLARATION:
2717                 declaration_statement_to_firm(&statement->declaration);
2718                 return;
2719         case STATEMENT_BREAK:
2720                 create_jump_statement(statement, break_label);
2721                 return;
2722         case STATEMENT_CONTINUE:
2723                 create_jump_statement(statement, continue_label);
2724                 return;
2725         case STATEMENT_SWITCH:
2726                 switch_statement_to_firm(&statement->switchs);
2727                 return;
2728         case STATEMENT_CASE_LABEL:
2729                 case_label_to_firm(&statement->case_label);
2730                 return;
2731         case STATEMENT_FOR:
2732                 for_statement_to_firm(&statement->fors);
2733                 return;
2734         case STATEMENT_LABEL:
2735                 label_to_firm(&statement->label);
2736                 return;
2737         case STATEMENT_GOTO:
2738                 goto_to_firm(&statement->gotos);
2739                 return;
2740         case STATEMENT_ASM:
2741                 break;
2742         }
2743         panic("Statement not implemented\n");
2744 }
2745
2746 static int count_local_declarations(const declaration_t *      decl,
2747                                     const declaration_t *const end)
2748 {
2749         int count = 0;
2750         for (; decl != end; decl = decl->next) {
2751                 const type_t *type = skip_typeref(decl->type);
2752                 switch (type->type) {
2753                         case TYPE_ATOMIC:
2754                         case TYPE_ENUM:
2755                         case TYPE_POINTER:
2756                                 if (!decl->address_taken)
2757                                         ++count;
2758                                 break;
2759
2760                         default: break;
2761                 }
2762         }
2763         return count;
2764 }
2765
2766 static int count_decls_in_stmts(const statement_t *stmt)
2767 {
2768         int count = 0;
2769         for (; stmt != NULL; stmt = stmt->base.next) {
2770                 switch (stmt->type) {
2771                         case STATEMENT_DECLARATION: {
2772                                 const declaration_statement_t *const decl_stmt =
2773                                         (const declaration_statement_t*)stmt;
2774                                 count += count_local_declarations(decl_stmt->declarations_begin,
2775                                                                   decl_stmt->declarations_end->next);
2776                                 break;
2777                         }
2778
2779                         case STATEMENT_COMPOUND: {
2780                                 const compound_statement_t *const comp =
2781                                         (const compound_statement_t*)stmt;
2782                                 count += count_decls_in_stmts(comp->statements);
2783                                 break;
2784                         }
2785
2786                         case STATEMENT_IF: {
2787                                 const if_statement_t *const if_stmt = (const if_statement_t*)stmt;
2788                                 count += count_decls_in_stmts(if_stmt->true_statement);
2789                                 count += count_decls_in_stmts(if_stmt->false_statement);
2790                                 break;
2791                         }
2792
2793                         case STATEMENT_SWITCH: {
2794                                 const switch_statement_t *const switch_stmt =
2795                                         (const switch_statement_t*)stmt;
2796                                 count += count_decls_in_stmts(switch_stmt->body);
2797                                 break;
2798                         }
2799
2800                         case STATEMENT_LABEL: {
2801                                 const label_statement_t *const label_stmt =
2802                                         (const label_statement_t*)stmt;
2803                                 count += count_decls_in_stmts(label_stmt->label_statement);
2804                                 break;
2805                         }
2806
2807                         case STATEMENT_WHILE: {
2808                                 const while_statement_t *const while_stmt =
2809                                         (const while_statement_t*)stmt;
2810                                 count += count_decls_in_stmts(while_stmt->body);
2811                                 break;
2812                         }
2813
2814                         case STATEMENT_DO_WHILE: {
2815                                 const do_while_statement_t *const do_while_stmt =
2816                                         (const do_while_statement_t*)stmt;
2817                                 count += count_decls_in_stmts(do_while_stmt->body);
2818                                 break;
2819                         }
2820
2821                         case STATEMENT_FOR: {
2822                                 const for_statement_t *const for_stmt =
2823                                         (const for_statement_t*)stmt;
2824                                 /* TODO initialisation */
2825                                 count += count_decls_in_stmts(for_stmt->body);
2826                                 break;
2827                         }
2828
2829                         case STATEMENT_ASM:
2830                         case STATEMENT_BREAK:
2831                         case STATEMENT_CASE_LABEL:
2832                         case STATEMENT_CONTINUE:
2833                         case STATEMENT_EXPRESSION:
2834                         case STATEMENT_GOTO:
2835                         case STATEMENT_INVALID:
2836                         case STATEMENT_RETURN:
2837                                 break;
2838                 }
2839         }
2840         return count;
2841 }
2842
2843 static int get_function_n_local_vars(declaration_t *declaration)
2844 {
2845         int count = 0;
2846
2847         /* count parameters */
2848         count += count_local_declarations(declaration->context.declarations, NULL);
2849
2850         /* count local variables declared in body */
2851         count += count_decls_in_stmts(declaration->init.statement);
2852
2853         /* TODO FIXME: Matze: I'm lazy don't want to scan all expressions
2854          * for expression statements... */
2855         count += 10;
2856
2857         return count;
2858 }
2859
2860 static void initialize_function_parameters(declaration_t *declaration)
2861 {
2862         ir_graph        *irg             = current_ir_graph;
2863         ir_node         *args            = get_irg_args(irg);
2864         ir_node         *start_block     = get_irg_start_block(irg);
2865         ir_type         *function_irtype = get_ir_type(declaration->type);
2866
2867         int            n         = 0;
2868         declaration_t *parameter = declaration->context.declarations;
2869         for( ; parameter != NULL; parameter = parameter->next, ++n) {
2870                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
2871                 type_t *type = skip_typeref(parameter->type);
2872
2873                 bool needs_entity = parameter->address_taken;
2874                 assert(!is_type_array(type));
2875                 if(is_type_compound(type)) {
2876                         needs_entity = true;
2877                 }
2878
2879                 if(needs_entity) {
2880                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
2881                         ident     *id     = new_id_from_str(parameter->symbol->string);
2882                         set_entity_ident(entity, id);
2883
2884                         parameter->declaration_type
2885                                 = DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY;
2886                         parameter->v.entity = entity;
2887                         continue;
2888                 }
2889
2890                 ir_mode *mode = get_ir_mode(parameter->type);
2891                 long     pn   = n;
2892                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2893
2894                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2895                 parameter->v.value_number   = next_value_number_function;
2896                 ++next_value_number_function;
2897
2898                 set_value(parameter->v.value_number, proj);
2899         }
2900 }
2901
2902 static void create_function(declaration_t *declaration)
2903 {
2904         ir_entity *function_entity = get_function_entity(declaration);
2905
2906         if(declaration->init.statement == NULL)
2907                 return;
2908
2909         current_function_decl = declaration;
2910         current_function_name = NULL;
2911
2912         assert(imature_blocks == NULL);
2913         imature_blocks = NEW_ARR_F(ir_node*, 0);
2914
2915         int       n_local_vars = get_function_n_local_vars(declaration);
2916         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
2917         ir_node  *first_block  = get_cur_block();
2918
2919         next_value_number_function = 0;
2920         initialize_function_parameters(declaration);
2921
2922         statement_to_firm(declaration->init.statement);
2923
2924         ir_node *end_block = get_irg_end_block(irg);
2925
2926         /* do we have a return statement yet? */
2927         if(get_cur_block() != NULL) {
2928                 type_t *type = skip_typeref(declaration->type);
2929                 assert(is_type_function(type));
2930                 const function_type_t *func_type   = &type->function;
2931                 const type_t          *return_type
2932                         = skip_typeref(func_type->return_type);
2933
2934                 ir_node *ret;
2935                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
2936                         ret = new_Return(get_store(), 0, NULL);
2937                 } else {
2938                         ir_mode *mode;
2939                         if(is_type_scalar(return_type)) {
2940                                 mode = get_ir_mode(func_type->return_type);
2941                         } else {
2942                                 mode = mode_P_data;
2943                         }
2944
2945                         ir_node *in[1];
2946                         // §5.1.2.2.3 main implicitly returns 0
2947                         if (strcmp(declaration->symbol->string, "main") == 0) {
2948                                 in[0] = new_Const(mode, get_mode_null(mode));
2949                         } else {
2950                                 in[0] = new_Unknown(mode);
2951                         }
2952                         ret = new_Return(get_store(), 1, in);
2953                 }
2954                 add_immBlock_pred(end_block, ret);
2955         }
2956
2957         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2958                 mature_immBlock(imature_blocks[i]);
2959         }
2960         DEL_ARR_F(imature_blocks);
2961         imature_blocks = NULL;
2962
2963         mature_immBlock(first_block);
2964         mature_immBlock(end_block);
2965
2966         irg_finalize_cons(irg);
2967
2968         /* finalize the frame type */
2969         ir_type *frame_type = get_irg_frame_type(irg);
2970         int      n          = get_compound_n_members(frame_type);
2971         int      align_all  = 4;
2972         int      offset     = 0;
2973         for(int i = 0; i < n; ++i) {
2974                 ir_entity *entity      = get_compound_member(frame_type, i);
2975                 ir_type   *entity_type = get_entity_type(entity);
2976
2977                 int align = get_type_alignment_bytes(entity_type);
2978                 if(align > align_all)
2979                         align_all = align;
2980                 int misalign = 0;
2981                 if(align > 0) {
2982                         misalign  = offset % align;
2983                         if(misalign > 0) {
2984                                 offset += align - misalign;
2985                         }
2986                 }
2987
2988                 set_entity_offset(entity, offset);
2989                 offset += get_type_size_bytes(entity_type);
2990         }
2991         set_type_size_bytes(frame_type, offset);
2992         set_type_alignment_bytes(frame_type, align_all);
2993         set_type_state(frame_type, layout_fixed);
2994
2995         irg_vrfy(irg);
2996 }
2997
2998 static void create_global_variable(declaration_t *declaration)
2999 {
3000         ir_visibility  vis;
3001         ir_type       *var_type;
3002         switch ((storage_class_tag_t)declaration->storage_class) {
3003                 case STORAGE_CLASS_STATIC:
3004                         vis = visibility_local;
3005                         goto global_var;
3006
3007                 case STORAGE_CLASS_EXTERN:
3008                         vis = visibility_external_allocated;
3009                         goto global_var;
3010
3011                 case STORAGE_CLASS_NONE:
3012                         vis = visibility_external_visible;
3013                         goto global_var;
3014
3015                 case STORAGE_CLASS_THREAD:
3016                         vis = visibility_external_visible;
3017                         goto tls_var;
3018
3019                 case STORAGE_CLASS_THREAD_EXTERN:
3020                         vis = visibility_external_allocated;
3021                         goto tls_var;
3022
3023                 case STORAGE_CLASS_THREAD_STATIC:
3024                         vis = visibility_local;
3025                         goto tls_var;
3026
3027 tls_var:
3028                         var_type = get_tls_type();
3029                         goto create_var;
3030
3031 global_var:
3032                         var_type = get_glob_type();
3033                         goto create_var;
3034
3035 create_var:
3036                         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
3037                                                   var_type);
3038                         set_entity_visibility(declaration->v.entity, vis);
3039
3040                         current_ir_graph = get_const_code_irg();
3041                         create_initializer(declaration);
3042                         return;
3043
3044                 case STORAGE_CLASS_TYPEDEF:
3045                 case STORAGE_CLASS_AUTO:
3046                 case STORAGE_CLASS_REGISTER:
3047                 case STORAGE_CLASS_ENUM_ENTRY:
3048                         break;
3049         }
3050         panic("Invalid storage class for global variable");
3051 }
3052
3053 static void context_to_firm(context_t *context)
3054 {
3055         /* first pass: create declarations */
3056         declaration_t *declaration = context->declarations;
3057         for( ; declaration != NULL; declaration = declaration->next) {
3058                 if(declaration->namespc != NAMESPACE_NORMAL)
3059                         continue;
3060                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3061                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3062                         continue;
3063                 if(declaration->symbol == NULL)
3064                         continue;
3065
3066                 type_t *type = skip_typeref(declaration->type);
3067                 if(is_type_function(type)) {
3068                         get_function_entity(declaration);
3069                 } else {
3070                         create_global_variable(declaration);
3071                 }
3072         }
3073
3074         /* second pass: create code */
3075         declaration = context->declarations;
3076         for( ; declaration != NULL; declaration = declaration->next) {
3077                 if(declaration->namespc != NAMESPACE_NORMAL)
3078                         continue;
3079                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3080                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3081                         continue;
3082                 if(declaration->symbol == NULL)
3083                         continue;
3084
3085                 type_t *type = declaration->type;
3086                 if(type->type != TYPE_FUNCTION)
3087                         continue;
3088
3089                 create_function(declaration);
3090         }
3091 }
3092
3093 void translation_unit_to_firm(translation_unit_t *unit)
3094 {
3095         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
3096         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
3097         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
3098
3099         ir_type_int        = get_ir_type(type_int);
3100         ir_type_const_char = get_ir_type(type_const_char);
3101         ir_type_wchar_t    = get_ir_type(type_wchar_t);
3102         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
3103                                                        type in firm */
3104
3105         type_void->base.firm_type = ir_type_void;
3106
3107         /* just to be sure */
3108         continue_label      = NULL;
3109         break_label         = NULL;
3110         current_switch_cond = NULL;
3111
3112         context_to_firm(& unit->context);
3113 }