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 set_value_for_expression(const expression_t *expression,
 965                                      ir_node *value)
 966 {
 967         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
 968         value          = do_strict_conv(dbgi, value);
 969
 970         if(expression->type == EXPR_REFERENCE) {
 971                 reference_expression_t *ref = (reference_expression_t*) expression;
 972
 973                 declaration_t *declaration = ref->declaration;
 974                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 975                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 976                         set_value(declaration->v.value_number, value);
 977                         return;
 978                 }
 979         }
 980
 981         ir_node  *addr   = expression_to_addr(expression);
 982         ir_node  *memory = get_store();
 983
 984         type_t *type = skip_typeref(expression->base.datatype);
 985         if(is_type_scalar(type)) {
 986                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 987                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 988                 set_store(store_mem);
 989         } else {
 990                 ir_type *irtype    = get_ir_type(type);
 991                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
 992                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
 993                 set_store(copyb_mem);
 994         }
 995 }
 996
 997 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 998 {
 999         ir_mode *value_mode = get_irn_mode(value);
1000
1001         if (value_mode == dest_mode || is_Bad(value))
1002                 return value;
1003
1004         if(dest_mode == mode_b) {
1005                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1006                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1007                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1008                 return proj;
1009         }
1010
1011         return new_d_Conv(dbgi, value, dest_mode);
1012 }
1013
1014 static ir_node *create_incdec(const unary_expression_t *expression)
1015 {
1016         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
1017         type_t       *type  = skip_typeref(expression->expression.datatype);
1018         ir_mode      *mode  = get_ir_mode(type);
1019         expression_t *value = expression->value;
1020
1021         ir_node *value_node = expression_to_firm(value);
1022
1023         ir_node *offset;
1024         if(is_type_pointer(type)) {
1025                 pointer_type_t *pointer_type = &type->pointer;
1026                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
1027                 offset = new_Const_long(mode_Is, elem_size);
1028         } else {
1029                 assert(is_type_arithmetic(type));
1030                 offset = new_Const(mode, get_mode_one(mode));
1031         }
1032
1033         switch(expression->type) {
1034         case UNEXPR_POSTFIX_INCREMENT: {
1035                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1036                 set_value_for_expression(value, new_value);
1037                 return value_node;
1038         }
1039         case UNEXPR_POSTFIX_DECREMENT: {
1040                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1041                 set_value_for_expression(value, new_value);
1042                 return value_node;
1043         }
1044         case UNEXPR_PREFIX_INCREMENT: {
1045                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1046                 set_value_for_expression(value, new_value);
1047                 return new_value;
1048         }
1049         case UNEXPR_PREFIX_DECREMENT: {
1050                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1051                 set_value_for_expression(value, new_value);
1052                 return new_value;
1053         }
1054         default:
1055                 panic("no incdec expr in create_incdec");
1056                 return NULL;
1057         }
1058 }
1059
1060 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1061 {
1062         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1063         type_t   *type = skip_typeref(expression->expression.datatype);
1064         ir_mode  *mode = get_ir_mode(type);
1065
1066         if(expression->type == UNEXPR_TAKE_ADDRESS)
1067                 return expression_to_addr(expression->value);
1068
1069         const expression_t *value      = expression->value;
1070         ir_node            *value_node = expression_to_firm(value);
1071
1072         switch(expression->type) {
1073         case UNEXPR_NEGATE:
1074                 return new_d_Minus(dbgi, value_node, mode);
1075         case UNEXPR_PLUS:
1076                 return value_node;
1077         case UNEXPR_BITWISE_NEGATE:
1078                 return new_d_Not(dbgi, value_node, mode);
1079         case UNEXPR_NOT: {
1080                 if(get_irn_mode(value_node) != mode_b) {
1081                         value_node = create_conv(dbgi, value_node, mode_b);
1082                 }
1083                 value_node = new_d_Not(dbgi, value_node, mode_b);
1084                 if(mode != mode_b) {
1085                         value_node = create_conv(dbgi, value_node, mode);
1086                 }
1087                 return value_node;
1088         }
1089         case UNEXPR_DEREFERENCE: {
1090                 type_t  *value_type = skip_typeref(value->base.datatype);
1091                 ir_type *irtype     = get_ir_type(value_type);
1092                 assert(is_Pointer_type(irtype));
1093                 ir_type *points_to  = get_pointer_points_to_type(irtype);
1094                 return deref_address(points_to, value_node, dbgi);
1095         }
1096         case UNEXPR_POSTFIX_INCREMENT:
1097         case UNEXPR_POSTFIX_DECREMENT:
1098         case UNEXPR_PREFIX_INCREMENT:
1099         case UNEXPR_PREFIX_DECREMENT:
1100                 return create_incdec(expression);
1101         case UNEXPR_CAST: {
1102                 ir_node *node = create_conv(dbgi, value_node, get_ir_mode(type));
1103                 node = do_strict_conv(dbgi, node);
1104                 return node;
1105         }
1106         case UNEXPR_CAST_IMPLICIT:
1107                 return create_conv(dbgi, value_node, get_ir_mode(type));
1108
1109         case UNEXPR_TAKE_ADDRESS:
1110         case UNEXPR_INVALID:
1111                 break;
1112         }
1113         panic("invalid UNEXPR type found");
1114 }
1115
1116 static long get_pnc(binary_expression_type_t type)
1117 {
1118         switch(type) {
1119         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
1120         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
1121         case BINEXPR_LESS:         return pn_Cmp_Lt;
1122         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
1123         case BINEXPR_GREATER:      return pn_Cmp_Gt;
1124         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
1125         default:
1126                 break;
1127         }
1128         panic("trying to get pn_Cmp from non-comparison binexpr type");
1129 }
1130
1131 static ir_node *create_lazy_op(const binary_expression_t *expression)
1132 {
1133         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1134         type_t   *type = expression->expression.datatype;
1135         ir_mode  *mode = get_ir_mode(type);
1136
1137         ir_node *cur_block = get_cur_block();
1138
1139         ir_node *one_block = new_immBlock();
1140         ir_node *one       = new_Const(mode, get_mode_one(mode));
1141         ir_node *jmp_one   = new_d_Jmp(dbgi);
1142
1143         ir_node *zero_block = new_immBlock();
1144         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1145         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1146
1147         set_cur_block(cur_block);
1148         create_condition_evaluation((const expression_t*) expression,
1149                                     one_block, zero_block);
1150         mature_immBlock(one_block);
1151         mature_immBlock(zero_block);
1152
1153         ir_node *common_block = new_immBlock();
1154         add_immBlock_pred(common_block, jmp_one);
1155         add_immBlock_pred(common_block, jmp_zero);
1156         mature_immBlock(common_block);
1157
1158         ir_node *in[2] = { one, zero };
1159         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1160
1161         return val;
1162 }
1163
1164 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1165                                             ir_node *right, ir_mode *mode);
1166
1167 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1168                                         create_arithmetic_func func)
1169 {
1170         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1171         ir_node  *left  = expression_to_firm(expression->left);
1172         ir_node  *right = expression_to_firm(expression->right);
1173         type_t   *type  = expression->right->base.datatype;
1174         /* be careful with the modes, because in arithmetic assign nodes only
1175          * the right operand has the mode of the arithmetic already */
1176         ir_mode  *mode  = get_ir_mode(type);
1177         left            = create_conv(dbgi, left, mode);
1178         ir_node  *res   = func(dbgi, left, right, mode);
1179
1180         return res;
1181 }
1182
1183 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1184                                    ir_node  *      integer,
1185                                    type_t   *const type,
1186                                    dbg_info *const dbgi,
1187                                    const create_arithmetic_func func)
1188 {
1189         pointer_type_t *const pointer_type = (pointer_type_t*)type;
1190         type_t         *const points_to    = pointer_type->points_to;
1191         const unsigned        elem_size    = get_type_size(points_to);
1192
1193         assert(elem_size >= 1);
1194         if (elem_size > 1) {
1195                 integer             = create_conv(dbgi, integer, mode_Is);
1196                 ir_node *const cnst = new_Const_long(mode_Is, (long)elem_size);
1197                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
1198                 integer = mul;
1199         }
1200
1201         ir_mode *const mode = get_ir_mode(type);
1202         return func(dbgi, pointer, integer, mode);
1203 }
1204
1205 static ir_node *create_arithmetic_assign_binop(
1206                 const binary_expression_t *expression, create_arithmetic_func func)
1207 {
1208         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1209         type_t   *const type = skip_typeref(expression->expression.datatype);
1210         ir_node  *value;
1211
1212         if (is_type_pointer(type)) {
1213                 ir_node        *const pointer = expression_to_firm(expression->left);
1214                 ir_node        *      integer = expression_to_firm(expression->right);
1215                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1216         } else {
1217                 value = create_arithmetic_binop(expression, func);
1218         }
1219
1220         ir_mode  *const mode = get_ir_mode(type);
1221         value = create_conv(dbgi, value, mode);
1222         set_value_for_expression(expression->left, value);
1223
1224         return value;
1225 }
1226
1227 static ir_node *create_add(const binary_expression_t *expression)
1228 {
1229         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1230         ir_node  *left  = expression_to_firm(expression->left);
1231         ir_node  *right = expression_to_firm(expression->right);
1232         type_t   *type  = expression->expression.datatype;
1233
1234         expression_t *expr_left  = expression->left;
1235         expression_t *expr_right = expression->right;
1236         type_t       *type_left  = skip_typeref(expr_left->base.datatype);
1237         type_t       *type_right = skip_typeref(expr_right->base.datatype);
1238
1239         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1240                 ir_mode *const mode = get_ir_mode(type);
1241                 return new_d_Add(dbgi, left, right, mode);
1242         }
1243
1244         if (is_type_pointer(type_left)) {
1245                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1246         } else {
1247                 assert(is_type_pointer(type_right));
1248                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1249         }
1250 }
1251
1252 static ir_node *create_sub(const binary_expression_t *expression)
1253 {
1254         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1255         expression_t *const expr_left  = expression->left;
1256         expression_t *const expr_right = expression->right;
1257         ir_node      *const left       = expression_to_firm(expr_left);
1258         ir_node      *const right      = expression_to_firm(expr_right);
1259         type_t       *const type       = expression->expression.datatype;
1260         type_t       *const type_left  = skip_typeref(expr_left->base.datatype);
1261         type_t       *const type_right = skip_typeref(expr_right->base.datatype);
1262
1263         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1264                 ir_mode *const mode = get_ir_mode(type);
1265                 return new_d_Sub(dbgi, left, right, mode);
1266         } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
1267                 const pointer_type_t *const ptr_type = &type_left->pointer;
1268                 const unsigned elem_size             = get_type_size(ptr_type->points_to);
1269                 ir_mode *const mode   = get_ir_mode(type);
1270                 ir_node *const sub    = new_d_Sub(dbgi, left, right, mode);
1271                 ir_node *const cnst   = new_Const_long(mode_Is, (long)elem_size);
1272                 ir_node *const no_mem = new_NoMem();
1273                 ir_node *const div    = new_d_Div(dbgi, no_mem, sub, cnst, mode,
1274                                                   op_pin_state_floats);
1275                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
1276         }
1277
1278         assert(is_type_pointer(type_left));
1279         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1280 }
1281
1282 static ir_node *create_shift(const binary_expression_t *expression)
1283 {
1284         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1285         ir_node  *left  = expression_to_firm(expression->left);
1286         ir_node  *right = expression_to_firm(expression->right);
1287         type_t   *type  = expression->expression.datatype;
1288         ir_mode  *mode  = get_ir_mode(type);
1289
1290         /* firm always wants the shift count to be unsigned */
1291         right = create_conv(dbgi, right, mode_Iu);
1292
1293         ir_node *res;
1294
1295         switch(expression->type) {
1296         case BINEXPR_SHIFTLEFT_ASSIGN:
1297         case BINEXPR_SHIFTLEFT:
1298                 res = new_d_Shl(dbgi, left, right, mode);
1299                 break;
1300         case BINEXPR_SHIFTRIGHT_ASSIGN:
1301         case BINEXPR_SHIFTRIGHT: {
1302                  expression_t *expr_left = expression->left;
1303                  type_t       *type_left = skip_typeref(expr_left->base.datatype);
1304
1305                  if(is_type_signed(type_left)) {
1306                         res = new_d_Shrs(dbgi, left, right, mode);
1307                  } else {
1308                          res = new_d_Shr(dbgi, left, right, mode);
1309                  }
1310                  break;
1311         }
1312         default:
1313                 panic("create shift op called for non-shift op");
1314         }
1315
1316         return res;
1317 }
1318
1319
1320 static ir_node *create_divmod(const binary_expression_t *expression)
1321 {
1322         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1323         ir_node  *left  = expression_to_firm(expression->left);
1324         ir_node  *right = expression_to_firm(expression->right);
1325         ir_node  *pin   = new_Pin(new_NoMem());
1326         /* be careful with the modes, because in arithmetic assign nodes only
1327          * the right operand has the mode of the arithmetic already */
1328         type_t   *type  = expression->right->base.datatype;
1329         ir_mode  *mode  = get_ir_mode(type);
1330         left            = create_conv(dbgi, left, mode);
1331         ir_node  *op;
1332         ir_node  *res;
1333
1334         switch (expression->type)  {
1335                 case BINEXPR_DIV:
1336                 case BINEXPR_DIV_ASSIGN:
1337                         if(mode_is_float(mode)) {
1338                                 op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1339                                 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1340                         } else {
1341                                 op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1342                                 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1343                         }
1344                         break;
1345
1346                 case BINEXPR_MOD:
1347                 case BINEXPR_MOD_ASSIGN:
1348                         assert(!mode_is_float(mode));
1349                         op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1350                         res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1351                         break;
1352
1353                 default: panic("unexpected binary expression type in create_divmod()");
1354         }
1355
1356         return res;
1357 }
1358
1359 static ir_node *create_arithmetic_assign_divmod(
1360                 const binary_expression_t *expression)
1361 {
1362         ir_node  *      value = create_divmod(expression);
1363         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1364         type_t   *const type  = expression->expression.datatype;
1365         ir_mode  *const mode  = get_ir_mode(type);
1366
1367         assert(type->type != TYPE_POINTER);
1368
1369         value = create_conv(dbgi, value, mode);
1370         set_value_for_expression(expression->left, value);
1371
1372         return value;
1373 }
1374
1375 static ir_node *create_arithmetic_assign_shift(
1376                 const binary_expression_t *expression)
1377 {
1378         ir_node  *      value = create_shift(expression);
1379         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1380         type_t   *const type  = expression->expression.datatype;
1381         ir_mode  *const mode  = get_ir_mode(type);
1382
1383         value = create_conv(dbgi, value, mode);
1384         set_value_for_expression(expression->left, value);
1385
1386         return value;
1387 }
1388
1389 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1390 {
1391         binary_expression_type_t type = expression->type;
1392         switch(type) {
1393         case BINEXPR_EQUAL:
1394         case BINEXPR_NOTEQUAL:
1395         case BINEXPR_LESS:
1396         case BINEXPR_LESSEQUAL:
1397         case BINEXPR_GREATER:
1398         case BINEXPR_GREATEREQUAL: {
1399                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1400                 ir_node *left  = expression_to_firm(expression->left);
1401                 ir_node *right = expression_to_firm(expression->right);
1402                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1403                 long     pnc   = get_pnc(type);
1404                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1405                 return proj;
1406         }
1407         case BINEXPR_ASSIGN: {
1408                 ir_node *right = expression_to_firm(expression->right);
1409                 set_value_for_expression(expression->left, right);
1410
1411                 return right;
1412         }
1413         case BINEXPR_ADD:
1414                 return create_add(expression);
1415         case BINEXPR_SUB:
1416                 return create_sub(expression);
1417         case BINEXPR_MUL:
1418                 return create_arithmetic_binop(expression, new_d_Mul);
1419         case BINEXPR_BITWISE_AND:
1420                 return create_arithmetic_binop(expression, new_d_And);
1421         case BINEXPR_BITWISE_OR:
1422                 return create_arithmetic_binop(expression, new_d_Or);
1423         case BINEXPR_BITWISE_XOR:
1424                 return create_arithmetic_binop(expression, new_d_Eor);
1425         case BINEXPR_SHIFTLEFT:
1426         case BINEXPR_SHIFTRIGHT:
1427                 return create_shift(expression);
1428         case BINEXPR_DIV:
1429         case BINEXPR_MOD:
1430                 return create_divmod(expression);
1431         case BINEXPR_LOGICAL_AND:
1432         case BINEXPR_LOGICAL_OR:
1433                 return create_lazy_op(expression);
1434         case BINEXPR_COMMA:
1435                 expression_to_firm(expression->left);
1436                 return expression_to_firm(expression->right);
1437         case BINEXPR_ADD_ASSIGN:
1438                 return create_arithmetic_assign_binop(expression, new_d_Add);
1439         case BINEXPR_SUB_ASSIGN:
1440                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1441         case BINEXPR_MUL_ASSIGN:
1442                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1443         case BINEXPR_DIV_ASSIGN:
1444                 return create_arithmetic_assign_divmod(expression);
1445         case BINEXPR_BITWISE_AND_ASSIGN:
1446                 return create_arithmetic_assign_binop(expression, new_d_And);
1447         case BINEXPR_BITWISE_OR_ASSIGN:
1448                 return create_arithmetic_assign_binop(expression, new_d_Or);
1449         case BINEXPR_BITWISE_XOR_ASSIGN:
1450                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1451         case BINEXPR_SHIFTLEFT_ASSIGN:
1452         case BINEXPR_SHIFTRIGHT_ASSIGN:
1453                 return create_arithmetic_assign_shift(expression);
1454         default:
1455                 panic("TODO binexpr type");
1456         }
1457 }
1458
1459 static ir_node *array_access_addr(const array_access_expression_t *expression)
1460 {
1461         dbg_info *dbgi      = get_dbg_info(&expression->expression.source_position);
1462         ir_node  *base_addr = expression_to_firm(expression->array_ref);
1463         ir_node  *offset    = expression_to_firm(expression->index);
1464         offset              = create_conv(dbgi, offset, mode_Iu);
1465
1466         type_t *ref_type = skip_typeref(expression->array_ref->base.datatype);
1467         assert(is_type_pointer(ref_type));
1468         pointer_type_t *pointer_type = (pointer_type_t*) ref_type;
1469
1470         unsigned elem_size       = get_type_size(pointer_type->points_to);
1471         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1472         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1473                                              mode_Iu);
1474         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1475
1476         return result;
1477 }
1478
1479 static ir_node *array_access_to_firm(
1480                 const array_access_expression_t *expression)
1481 {
1482         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1483         ir_node  *addr   = array_access_addr(expression);
1484         type_t   *type   = revert_automatic_type_conversion(
1485                         (const expression_t*) expression);
1486         type             = skip_typeref(type);
1487         ir_type  *irtype = get_ir_type(type);
1488
1489         return deref_address(irtype, addr, dbgi);
1490 }
1491
1492 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1493 {
1494         type_t *type = expression->type;
1495         if(type == NULL) {
1496                 type = expression->size_expression->base.datatype;
1497                 assert(type != NULL);
1498         }
1499
1500         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1501         unsigned  size      = get_type_size(type);
1502         ir_node  *size_node = new_Const_long(mode, size);
1503
1504         return size_node;
1505 }
1506
1507 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1508 {
1509         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1510
1511         ir_node *cur_block   = get_cur_block();
1512
1513         /* create the true block */
1514         ir_node *true_block  = new_immBlock();
1515
1516         ir_node *true_val = expression_to_firm(expression->true_expression);
1517         ir_node *true_jmp = new_Jmp();
1518
1519         /* create the false block */
1520         ir_node *false_block = new_immBlock();
1521
1522         ir_node *false_val = expression_to_firm(expression->false_expression);
1523         ir_node *false_jmp = new_Jmp();
1524
1525         /* create the condition evaluation */
1526         set_cur_block(cur_block);
1527         create_condition_evaluation(expression->condition, true_block, false_block);
1528         mature_immBlock(true_block);
1529         mature_immBlock(false_block);
1530
1531         /* create the common block */
1532         ir_node *common_block = new_immBlock();
1533         add_immBlock_pred(common_block, true_jmp);
1534         add_immBlock_pred(common_block, false_jmp);
1535         mature_immBlock(common_block);
1536
1537         /* TODO improve static semantics, so either both or no values are NULL */
1538         if (true_val == NULL || false_val == NULL)
1539                 return NULL;
1540
1541         ir_node *in[2] = { true_val, false_val };
1542         ir_mode *mode  = get_irn_mode(true_val);
1543         assert(get_irn_mode(false_val) == mode);
1544         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1545
1546         return val;
1547 }
1548
1549 static ir_node *select_addr(const select_expression_t *expression)
1550 {
1551         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1552
1553         ir_node *compound_addr = expression_to_firm(expression->compound);
1554
1555         declaration_t *entry = expression->compound_entry;
1556         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1557         ir_entity     *entity = entry->v.entity;
1558
1559         assert(entity != NULL);
1560
1561         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1562
1563         return sel;
1564 }
1565
1566 static ir_node *select_to_firm(const select_expression_t *expression)
1567 {
1568         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1569         ir_node  *addr   = select_addr(expression);
1570         type_t   *type   = revert_automatic_type_conversion(
1571                         (const expression_t*) expression);
1572         type             = skip_typeref(type);
1573         ir_type  *irtype = get_ir_type(type);
1574
1575         return deref_address(irtype, addr, dbgi);
1576 }
1577
1578 /* Values returned by __builtin_classify_type. */
1579 typedef enum gcc_type_class
1580 {
1581         no_type_class = -1,
1582         void_type_class,
1583         integer_type_class,
1584         char_type_class,
1585         enumeral_type_class,
1586         boolean_type_class,
1587         pointer_type_class,
1588         reference_type_class,
1589         offset_type_class,
1590         real_type_class,
1591         complex_type_class,
1592         function_type_class,
1593         method_type_class,
1594         record_type_class,
1595         union_type_class,
1596         array_type_class,
1597         string_type_class,
1598         set_type_class,
1599         file_type_class,
1600         lang_type_class
1601 } gcc_type_class;
1602
1603 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
1604 {
1605         const type_t *const type = expr->type_expression->base.datatype;
1606
1607         gcc_type_class tc;
1608         switch (type->type)
1609         {
1610                 case TYPE_ATOMIC: {
1611                         const atomic_type_t *const atomic_type = &type->atomic;
1612                         switch (atomic_type->atype) {
1613                                 // should not be reached
1614                                 case ATOMIC_TYPE_INVALID:
1615                                         tc = no_type_class;
1616                                         break;
1617
1618                                 // gcc cannot do that
1619                                 case ATOMIC_TYPE_VOID:
1620                                         tc = void_type_class;
1621                                         break;
1622
1623                                 case ATOMIC_TYPE_CHAR:      // gcc handles this as integer
1624                                 case ATOMIC_TYPE_SCHAR:     // gcc handles this as integer
1625                                 case ATOMIC_TYPE_UCHAR:     // gcc handles this as integer
1626                                 case ATOMIC_TYPE_SHORT:
1627                                 case ATOMIC_TYPE_USHORT:
1628                                 case ATOMIC_TYPE_INT:
1629                                 case ATOMIC_TYPE_UINT:
1630                                 case ATOMIC_TYPE_LONG:
1631                                 case ATOMIC_TYPE_ULONG:
1632                                 case ATOMIC_TYPE_LONGLONG:
1633                                 case ATOMIC_TYPE_ULONGLONG:
1634                                 case ATOMIC_TYPE_BOOL:      // gcc handles this as integer
1635                                         tc = integer_type_class;
1636                                         break;
1637
1638                                 case ATOMIC_TYPE_FLOAT:
1639                                 case ATOMIC_TYPE_DOUBLE:
1640                                 case ATOMIC_TYPE_LONG_DOUBLE:
1641                                         tc = real_type_class;
1642                                         break;
1643
1644 #ifdef PROVIDE_COMPLEX
1645                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
1646                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
1647                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
1648                                         tc = complex_type_class;
1649                                         break;
1650                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
1651                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
1652                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
1653                                         tc = complex_type_class;
1654                                         break;
1655 #endif
1656
1657                                 default:
1658                                         panic("Unimplemented case in classify_type_to_firm().");
1659                         }
1660                         break;
1661                 }
1662
1663                 case TYPE_ARRAY:           // gcc handles this as pointer
1664                 case TYPE_FUNCTION:        // gcc handles this as pointer
1665                 case TYPE_POINTER:         tc = pointer_type_class; break;
1666                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
1667                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
1668
1669                 // gcc handles this as integer
1670                 case TYPE_ENUM:            tc = integer_type_class; break;
1671
1672                 default:
1673                         panic("Unimplemented case in classify_type_to_firm().");
1674         }
1675
1676         dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
1677         ir_mode  *const mode = mode_Is;
1678         tarval   *const tv   = new_tarval_from_long(tc, mode);
1679         return new_d_Const(dbgi, mode, tv);
1680 }
1681
1682 static ir_node *function_name_to_firm(
1683                 const string_literal_expression_t *const expr)
1684 {
1685         if (current_function_name == NULL) {
1686                 const source_position_t *const src_pos =
1687                         &expr->expression.source_position;
1688                 const char *const name = current_function_decl->symbol->string;
1689                 current_function_name = string_to_firm(src_pos, "__func__", name);
1690         }
1691
1692         return current_function_name;
1693 }
1694
1695 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
1696 {
1697         statement_t *statement = expr->statement;
1698
1699         assert(statement->type == STATEMENT_COMPOUND);
1700         return compound_statement_to_firm((compound_statement_t*) statement);
1701 }
1702
1703 static ir_node *dereference_addr(const unary_expression_t *const expression)
1704 {
1705         assert(expression->type == UNEXPR_DEREFERENCE);
1706         return expression_to_firm(expression->value);
1707 }
1708
1709 static ir_node *expression_to_addr(const expression_t *expression)
1710 {
1711         switch(expression->type) {
1712         case EXPR_REFERENCE:
1713                 return reference_addr(&expression->reference);
1714         case EXPR_ARRAY_ACCESS:
1715                 return array_access_addr(&expression->array_access);
1716         case EXPR_SELECT:
1717                 return select_addr(&expression->select);
1718         case EXPR_CALL:
1719                 return call_expression_to_firm(&expression->call);
1720         case EXPR_UNARY: {
1721                 const unary_expression_t *const unary_expr = &expression->unary;
1722                 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1723                         return dereference_addr(unary_expr);
1724                 }
1725                 break;
1726         }
1727         default:
1728                 break;
1729         }
1730         panic("trying to get address of non-lvalue");
1731 }
1732
1733 static ir_node *_expression_to_firm(const expression_t *expression)
1734 {
1735         switch(expression->type) {
1736         case EXPR_CONST:
1737                 return const_to_firm(&expression->conste);
1738         case EXPR_STRING_LITERAL:
1739                 return string_literal_to_firm(&expression->string);
1740         case EXPR_WIDE_STRING_LITERAL:
1741                 return wide_string_literal_to_firm(&expression->wide_string);
1742         case EXPR_REFERENCE:
1743                 return reference_expression_to_firm(&expression->reference);
1744         case EXPR_CALL:
1745                 return call_expression_to_firm(&expression->call);
1746         case EXPR_UNARY:
1747                 return unary_expression_to_firm(&expression->unary);
1748         case EXPR_BINARY:
1749                 return binary_expression_to_firm(&expression->binary);
1750         case EXPR_ARRAY_ACCESS:
1751                 return array_access_to_firm(&expression->array_access);
1752         case EXPR_SIZEOF:
1753                 return sizeof_to_firm(&expression->sizeofe);
1754         case EXPR_CONDITIONAL:
1755                 return conditional_to_firm(&expression->conditional);
1756         case EXPR_SELECT:
1757                 return select_to_firm(&expression->select);
1758         case EXPR_CLASSIFY_TYPE:
1759                 return classify_type_to_firm(&expression->classify_type);
1760         case EXPR_FUNCTION:
1761         case EXPR_PRETTY_FUNCTION:
1762                 return function_name_to_firm(&expression->string);
1763         case EXPR_STATEMENT:
1764                 return statement_expression_to_firm(&expression->statement);
1765         case EXPR_OFFSETOF:
1766         case EXPR_VA_ARG:
1767         case EXPR_BUILTIN_SYMBOL:
1768                 panic("unimplemented expression found");
1769
1770         case EXPR_UNKNOWN:
1771         case EXPR_INVALID:
1772                 break;
1773         }
1774         panic("invalid expression found");
1775 }
1776
1777 static ir_node *expression_to_firm(const expression_t *expression)
1778 {
1779         ir_node *res = _expression_to_firm(expression);
1780
1781         if(res != NULL && get_irn_mode(res) == mode_b) {
1782                 ir_mode *mode = get_ir_mode(expression->base.datatype);
1783                 res           = create_conv(NULL, res, mode);
1784         }
1785
1786         return res;
1787 }
1788
1789 static ir_node *expression_to_modeb(const expression_t *expression)
1790 {
1791         ir_node *res = _expression_to_firm(expression);
1792         res          = create_conv(NULL, res, mode_b);
1793
1794         return res;
1795 }
1796
1797 /**
1798  * create a short-circuit expression evaluation that tries to construct
1799  * efficient control flow structures for &&, || and ! expressions
1800  */
1801 static void create_condition_evaluation(const expression_t *expression,
1802                                         ir_node *true_block,
1803                                         ir_node *false_block)
1804 {
1805         switch(expression->type) {
1806         case EXPR_UNARY: {
1807                 unary_expression_t *unary_expression = (unary_expression_t*) expression;
1808                 if(unary_expression->type == UNEXPR_NOT) {
1809                         create_condition_evaluation(unary_expression->value, false_block,
1810                                                     true_block);
1811                         return;
1812                 }
1813                 break;
1814         }
1815         case EXPR_BINARY: {
1816                 binary_expression_t *binary_expression
1817                         = (binary_expression_t*) expression;
1818                 if(binary_expression->type == BINEXPR_LOGICAL_AND) {
1819                         ir_node *cur_block   = get_cur_block();
1820                         ir_node *extra_block = new_immBlock();
1821                         set_cur_block(cur_block);
1822                         create_condition_evaluation(binary_expression->left, extra_block,
1823                                                     false_block);
1824                         mature_immBlock(extra_block);
1825                         set_cur_block(extra_block);
1826                         create_condition_evaluation(binary_expression->right, true_block,
1827                                                     false_block);
1828                         return;
1829                 }
1830                 if(binary_expression->type == BINEXPR_LOGICAL_OR) {
1831                         ir_node *cur_block   = get_cur_block();
1832                         ir_node *extra_block = new_immBlock();
1833                         set_cur_block(cur_block);
1834                         create_condition_evaluation(binary_expression->left, true_block,
1835                                                     extra_block);
1836                         mature_immBlock(extra_block);
1837                         set_cur_block(extra_block);
1838                         create_condition_evaluation(binary_expression->right, true_block,
1839                                                     false_block);
1840                         return;
1841                 }
1842                 break;
1843         }
1844         default:
1845                 break;
1846         }
1847
1848         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
1849         ir_node  *condition  = expression_to_modeb(expression);
1850         ir_node  *cond       = new_d_Cond(dbgi, condition);
1851         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1852         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1853
1854         add_immBlock_pred(true_block, true_proj);
1855         add_immBlock_pred(false_block, false_proj);
1856
1857         set_cur_block(NULL);
1858 }
1859
1860 static void return_statement_to_firm(return_statement_t *statement)
1861 {
1862         if(get_cur_block() == NULL)
1863                 return;
1864
1865         ir_type *func_irtype = get_ir_type(current_function_decl->type);
1866
1867         dbg_info *dbgi  = get_dbg_info(&statement->statement.source_position);
1868
1869         ir_node *in[1];
1870         int      in_len;
1871         if(get_method_n_ress(func_irtype) > 0) {
1872                 ir_type *res_type = get_method_res_type(func_irtype, 0);
1873
1874                 if(statement->return_value != NULL) {
1875                         ir_node *node = expression_to_firm(statement->return_value);
1876                         node  = do_strict_conv(dbgi, node);
1877                         in[0] = node;
1878                 } else {
1879                         ir_mode *mode;
1880                         if(is_compound_type(res_type)) {
1881                                 mode = mode_P_data;
1882                         } else {
1883                                 mode = get_type_mode(res_type);
1884                         }
1885                         in[0] = new_Unknown(mode);
1886                 }
1887                 in_len = 1;
1888         } else {
1889                 /* build return_value for its side effects */
1890                 if(statement->return_value != NULL) {
1891                         expression_to_firm(statement->return_value);
1892                 }
1893                 in_len = 0;
1894         }
1895
1896         ir_node  *store = get_store();
1897         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
1898
1899         ir_node *end_block = get_irg_end_block(current_ir_graph);
1900         add_immBlock_pred(end_block, ret);
1901
1902         set_cur_block(NULL);
1903 }
1904
1905 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
1906 {
1907         if(get_cur_block() == NULL)
1908                 return NULL;
1909
1910         return expression_to_firm(statement->expression);
1911 }
1912
1913 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
1914 {
1915         ir_node     *result    = NULL;
1916         statement_t *statement = compound->statements;
1917         for( ; statement != NULL; statement = statement->base.next) {
1918                 //context2firm(&statement->context);
1919
1920                 if(statement->base.next == NULL
1921                                 && statement->type == STATEMENT_EXPRESSION) {
1922                         result = expression_statement_to_firm(
1923                                         (expression_statement_t*) statement);
1924                         break;
1925                 }
1926                 statement_to_firm(statement);
1927         }
1928
1929         return result;
1930 }
1931
1932 static void if_statement_to_firm(if_statement_t *statement)
1933 {
1934         ir_node *cur_block = get_cur_block();
1935
1936         ir_node *fallthrough_block = new_immBlock();
1937
1938         /* the true (blocks) */
1939         ir_node *true_block;
1940         if (statement->true_statement != NULL) {
1941                 true_block = new_immBlock();
1942                 statement_to_firm(statement->true_statement);
1943                 if(get_cur_block() != NULL) {
1944                         ir_node *jmp = new_Jmp();
1945                         add_immBlock_pred(fallthrough_block, jmp);
1946                 }
1947         } else {
1948                 true_block = fallthrough_block;
1949         }
1950
1951         /* the false (blocks) */
1952         ir_node *false_block;
1953         if(statement->false_statement != NULL) {
1954                 false_block = new_immBlock();
1955
1956                 statement_to_firm(statement->false_statement);
1957                 if(get_cur_block() != NULL) {
1958                         ir_node *jmp = new_Jmp();
1959                         add_immBlock_pred(fallthrough_block, jmp);
1960                 }
1961         } else {
1962                 false_block = fallthrough_block;
1963         }
1964
1965         /* create the condition */
1966         if(cur_block != NULL) {
1967                 set_cur_block(cur_block);
1968                 create_condition_evaluation(statement->condition, true_block,
1969                                             false_block);
1970         }
1971
1972         mature_immBlock(true_block);
1973         if(false_block != fallthrough_block) {
1974                 mature_immBlock(false_block);
1975         }
1976         mature_immBlock(fallthrough_block);
1977
1978         set_cur_block(fallthrough_block);
1979 }
1980
1981 static void while_statement_to_firm(while_statement_t *statement)
1982 {
1983         ir_node *jmp = NULL;
1984         if(get_cur_block() != NULL) {
1985                 jmp = new_Jmp();
1986         }
1987
1988         /* create the header block */
1989         ir_node *header_block = new_immBlock();
1990         if(jmp != NULL) {
1991                 add_immBlock_pred(header_block, jmp);
1992         }
1993
1994         /* the false block */
1995         ir_node *false_block = new_immBlock();
1996
1997         /* the loop body */
1998         ir_node *body_block;
1999         if (statement->body != NULL) {
2000                 ir_node *old_continue_label = continue_label;
2001                 ir_node *old_break_label    = break_label;
2002                 continue_label              = header_block;
2003                 break_label                 = false_block;
2004
2005                 body_block = new_immBlock();
2006                 statement_to_firm(statement->body);
2007
2008                 assert(continue_label == header_block);
2009                 assert(break_label    == false_block);
2010                 continue_label = old_continue_label;
2011                 break_label    = old_break_label;
2012
2013                 if(get_cur_block() != NULL) {
2014                         jmp = new_Jmp();
2015                         add_immBlock_pred(header_block, jmp);
2016                 }
2017         } else {
2018                 body_block = header_block;
2019         }
2020
2021         /* create the condition */
2022         set_cur_block(header_block);
2023
2024         create_condition_evaluation(statement->condition, body_block, false_block);
2025         mature_immBlock(body_block);
2026         mature_immBlock(false_block);
2027         mature_immBlock(header_block);
2028
2029         set_cur_block(false_block);
2030 }
2031
2032 static void do_while_statement_to_firm(do_while_statement_t *statement)
2033 {
2034         ir_node *jmp = NULL;
2035         if(get_cur_block() != NULL) {
2036                 jmp = new_Jmp();
2037         }
2038
2039         /* create the header block */
2040         ir_node *header_block = new_immBlock();
2041
2042         /* the false block */
2043         ir_node *false_block = new_immBlock();
2044
2045         /* the loop body */
2046         ir_node *body_block = new_immBlock();
2047         if(jmp != NULL) {
2048                 add_immBlock_pred(body_block, jmp);
2049         }
2050
2051         if (statement->body != NULL) {
2052                 ir_node *old_continue_label = continue_label;
2053                 ir_node *old_break_label    = break_label;
2054                 continue_label              = header_block;
2055                 break_label                 = false_block;
2056
2057                 statement_to_firm(statement->body);
2058
2059                 assert(continue_label == header_block);
2060                 assert(break_label    == false_block);
2061                 continue_label = old_continue_label;
2062                 break_label    = old_break_label;
2063
2064                 if (get_cur_block() == NULL) {
2065                         mature_immBlock(header_block);
2066                         mature_immBlock(body_block);
2067                         mature_immBlock(false_block);
2068                         return;
2069                 }
2070         }
2071
2072         ir_node *body_jmp = new_Jmp();
2073         add_immBlock_pred(header_block, body_jmp);
2074         mature_immBlock(header_block);
2075
2076         /* create the condition */
2077         set_cur_block(header_block);
2078
2079         create_condition_evaluation(statement->condition, body_block, false_block);
2080         mature_immBlock(body_block);
2081         mature_immBlock(false_block);
2082         mature_immBlock(header_block);
2083
2084         set_cur_block(false_block);
2085 }
2086
2087 static void for_statement_to_firm(for_statement_t *statement)
2088 {
2089         ir_node *jmp = NULL;
2090         if (get_cur_block() != NULL) {
2091                 if(statement->initialisation != NULL) {
2092                         expression_to_firm(statement->initialisation);
2093                 }
2094                 jmp = new_Jmp();
2095         }
2096
2097         /* create the step block */
2098         ir_node *const step_block = new_immBlock();
2099         if (statement->step != NULL) {
2100                 expression_to_firm(statement->step);
2101         }
2102         ir_node *const step_jmp = new_Jmp();
2103
2104         /* create the header block */
2105         ir_node *const header_block = new_immBlock();
2106         if (jmp != NULL) {
2107                 add_immBlock_pred(header_block, jmp);
2108         }
2109         add_immBlock_pred(header_block, step_jmp);
2110
2111         /* the false block */
2112         ir_node *const false_block = new_immBlock();
2113
2114         /* the loop body */
2115         ir_node * body_block;
2116         if (statement->body != NULL) {
2117                 ir_node *const old_continue_label = continue_label;
2118                 ir_node *const old_break_label    = break_label;
2119                 continue_label = step_block;
2120                 break_label    = false_block;
2121
2122                 body_block = new_immBlock();
2123                 statement_to_firm(statement->body);
2124
2125                 assert(continue_label == step_block);
2126                 assert(break_label    == false_block);
2127                 continue_label = old_continue_label;
2128                 break_label    = old_break_label;
2129
2130                 if (get_cur_block() != NULL) {
2131                         jmp = new_Jmp();
2132                         add_immBlock_pred(step_block, jmp);
2133                 }
2134         } else {
2135                 body_block = step_block;
2136         }
2137
2138         /* create the condition */
2139         set_cur_block(header_block);
2140         if (statement->condition != NULL) {
2141                 create_condition_evaluation(statement->condition, body_block,
2142                                             false_block);
2143         } else {
2144                 keep_alive(header_block);
2145                 jmp = new_Jmp();
2146                 add_immBlock_pred(body_block, jmp);
2147         }
2148
2149         mature_immBlock(body_block);
2150         mature_immBlock(false_block);
2151         mature_immBlock(step_block);
2152         mature_immBlock(header_block);
2153         mature_immBlock(false_block);
2154
2155         set_cur_block(false_block);
2156 }
2157
2158 static void create_declaration_entity(declaration_t *declaration,
2159                                       declaration_type_t declaration_type,
2160                                       ir_type *parent_type)
2161 {
2162         ident     *id     = new_id_from_str(declaration->symbol->string);
2163         ir_type   *irtype = get_ir_type(declaration->type);
2164         ir_entity *entity = new_entity(parent_type, id, irtype);
2165         set_entity_ld_ident(entity, id);
2166
2167         declaration->declaration_type = (unsigned char) declaration_type;
2168         declaration->v.entity         = entity;
2169         set_entity_variability(entity, variability_uninitialized);
2170         /* TODO: visibility? */
2171 }
2172
2173 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
2174
2175 enum compound_graph_entry_type_t {
2176         COMPOUND_GRAPH_ENTRY_ARRAY,
2177         COMPOUND_GRAPH_ENTRY_COMPOUND
2178 };
2179
2180 struct compound_graph_path_entry_t {
2181         int type;
2182         union {
2183                 ir_entity *entity;
2184                 int        array_index;
2185         } v;
2186         compound_graph_path_entry_t *prev;
2187 };
2188
2189 static void create_initializer_object(initializer_t *initializer, type_t *type,
2190                 ir_entity *entity, compound_graph_path_entry_t *entry, int len);
2191
2192 static compound_graph_path *create_compound_path(ir_type *type,
2193                 compound_graph_path_entry_t *entry, int len)
2194 {
2195         compound_graph_path *path = new_compound_graph_path(type, len);
2196
2197         int i = len - 1;
2198         for( ; entry != NULL; entry = entry->prev, --i) {
2199                 assert(i >= 0);
2200                 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
2201                         set_compound_graph_path_node(path, i, entry->v.entity);
2202                 } else {
2203                         assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
2204                         set_compound_graph_path_array_index(path, i, entry->v.array_index);
2205                 }
2206         }
2207         assert(i == -1);
2208
2209         return path;
2210 }
2211
2212 static void create_initializer_value(initializer_value_t *initializer,
2213                                      ir_entity *entity,
2214                                      compound_graph_path_entry_t *entry,
2215                                      int len)
2216 {
2217         ir_node             *node = expression_to_firm(initializer->value);
2218         ir_type             *type = get_entity_type(entity);
2219         compound_graph_path *path = create_compound_path(type, entry, len);
2220         add_compound_ent_value_w_path(entity, node, path);
2221 }
2222
2223 static void create_initializer_compound(initializer_list_t *initializer,
2224                                         compound_type_t *type,
2225                                         ir_entity *entity,
2226                                         compound_graph_path_entry_t *last_entry,
2227                                         int len)
2228 {
2229         declaration_t *compound_declaration = type->declaration;
2230
2231         declaration_t *compound_entry = compound_declaration->context.declarations;
2232
2233         compound_graph_path_entry_t entry;
2234         entry.type = COMPOUND_GRAPH_ENTRY_COMPOUND;
2235         entry.prev = last_entry;
2236         ++len;
2237
2238         size_t i = 0;
2239         for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
2240                 if(compound_entry->symbol == NULL)
2241                         continue;
2242                 if(compound_entry->namespc != NAMESPACE_NORMAL)
2243                         continue;
2244
2245                 if(i >= initializer->len)
2246                         break;
2247
2248                 entry.v.entity = compound_entry->v.entity;
2249
2250                 initializer_t *sub_initializer = initializer->initializers[i];
2251
2252                 assert(compound_entry != NULL);
2253                 assert(compound_entry->declaration_type
2254                                 == DECLARATION_TYPE_COMPOUND_MEMBER);
2255
2256                 if(sub_initializer->type == INITIALIZER_VALUE) {
2257                         create_initializer_value(&sub_initializer->value,
2258                                                  entity, &entry, len);
2259                 } else {
2260                         type_t *entry_type = skip_typeref(compound_entry->type);
2261                         create_initializer_object(sub_initializer, entry_type, entity,
2262                                                   &entry, len);
2263                 }
2264
2265                 ++i;
2266         }
2267 }
2268
2269 static void create_initializer_array(initializer_list_t *initializer,
2270                                      array_type_t *type, ir_entity *entity,
2271                                      compound_graph_path_entry_t *last_entry,
2272                                      int len)
2273 {
2274         type_t *element_type = type->element_type;
2275         element_type         = skip_typeref(element_type);
2276
2277         compound_graph_path_entry_t entry;
2278         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2279         entry.prev = last_entry;
2280         ++len;
2281
2282         size_t i;
2283         for(i = 0; i < initializer->len; ++i) {
2284                 entry.v.array_index = i;
2285
2286                 initializer_t *sub_initializer = initializer->initializers[i];
2287
2288                 if(sub_initializer->type == INITIALIZER_VALUE) {
2289                         create_initializer_value(&sub_initializer->value,
2290                                                  entity, &entry, len);
2291                 } else {
2292                         create_initializer_object(sub_initializer, element_type, entity,
2293                                                   &entry, len);
2294                 }
2295         }
2296
2297 #if 0
2298         /* TODO: initialize rest... */
2299         if(type->size_expression != NULL) {
2300                 size_t array_len = fold_constant(type->size_expression);
2301                 for( ; i < array_len; ++i) {
2302
2303                 }
2304         }
2305 #endif
2306 }
2307
2308 static void create_initializer_string(initializer_string_t *initializer,
2309                                       array_type_t *type, ir_entity *entity,
2310                                       compound_graph_path_entry_t *last_entry,
2311                                       int len)
2312 {
2313         type_t *element_type = type->element_type;
2314         element_type         = skip_typeref(element_type);
2315
2316         compound_graph_path_entry_t entry;
2317         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2318         entry.prev = last_entry;
2319         ++len;
2320
2321         ir_type    *irtype  = get_entity_type(entity);
2322         size_t      arr_len = get_array_type_size(type);
2323         const char *p       = initializer->string;
2324         size_t      i       = 0;
2325         for(i = 0; i < arr_len; ++i, ++p) {
2326                 entry.v.array_index = i;
2327
2328                 ir_node             *node = new_Const_long(mode_Bs, *p);
2329                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2330                 add_compound_ent_value_w_path(entity, node, path);
2331
2332                 if(*p == '\0')
2333                         break;
2334         }
2335 }
2336
2337 static void create_initializer_object(initializer_t *initializer, type_t *type,
2338                 ir_entity *entity, compound_graph_path_entry_t *entry, int len)
2339 {
2340         if(is_type_array(type)) {
2341                 array_type_t *array_type = &type->array;
2342
2343                 if(initializer->type == INITIALIZER_STRING) {
2344                         initializer_string_t *string = &initializer->string;
2345                         create_initializer_string(string, array_type, entity, entry, len);
2346                 } else {
2347                         assert(initializer->type == INITIALIZER_LIST);
2348                         initializer_list_t *list = &initializer->list;
2349                         create_initializer_array(list, array_type, entity, entry, len);
2350                 }
2351         } else {
2352                 assert(initializer->type == INITIALIZER_LIST);
2353                 initializer_list_t *list = &initializer->list;
2354
2355                 assert(is_type_compound(type));
2356                 compound_type_t *compound_type = &type->compound;
2357                 create_initializer_compound(list, compound_type, entity, entry, len);
2358         }
2359 }
2360
2361 static void create_initializer_local_variable_entity(declaration_t *declaration)
2362 {
2363         initializer_t *initializer = declaration->init.initializer;
2364         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
2365         ir_entity     *entity      = declaration->v.entity;
2366         ir_node       *memory      = get_store();
2367         ir_node       *nomem       = new_NoMem();
2368         ir_node       *frame       = get_irg_frame(current_ir_graph);
2369         ir_node       *addr        = new_d_simpleSel(dbgi, nomem, frame, entity);
2370
2371         if(is_atomic_entity(entity)) {
2372                 assert(initializer->type == INITIALIZER_VALUE);
2373                 initializer_value_t *initializer_value = &initializer->value;
2374
2375                 ir_node *value     = expression_to_firm(initializer_value->value);
2376                 ir_node *store     = new_d_Store(dbgi, memory, addr, value);
2377                 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2378                 set_store(store_mem);
2379                 return;
2380         }
2381
2382         /* create a "template" entity which is copied to the entity on the stack */
2383         ident     *id          = unique_ident("initializer");
2384         ir_type   *irtype      = get_ir_type(declaration->type);
2385         ir_type   *global_type = get_glob_type();
2386         ir_entity *init_entity = new_entity(global_type, id, irtype);
2387         set_entity_ld_ident(init_entity, id);
2388
2389         set_entity_variability(init_entity, variability_initialized);
2390         set_entity_visibility(init_entity, visibility_local);
2391
2392         ir_graph *old_current_ir_graph = current_ir_graph;
2393         current_ir_graph = get_const_code_irg();
2394
2395         type_t *type = skip_typeref(declaration->type);
2396         create_initializer_object(initializer, type, init_entity, NULL, 0);
2397
2398         assert(current_ir_graph == get_const_code_irg());
2399         current_ir_graph = old_current_ir_graph;
2400
2401         ir_node *src_addr  = create_symconst(dbgi, init_entity);
2402         ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
2403
2404         ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
2405         set_store(copyb_mem);
2406 }
2407
2408 static void create_initializer(declaration_t *declaration)
2409 {
2410         initializer_t *initializer = declaration->init.initializer;
2411         if(initializer == NULL)
2412                 return;
2413
2414         declaration_type_t declaration_type
2415                 = (declaration_type_t) declaration->declaration_type;
2416         if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY) {
2417                 create_initializer_local_variable_entity(declaration);
2418                 return;
2419         }
2420
2421         if(initializer->type == INITIALIZER_VALUE) {
2422                 initializer_value_t *initializer_value = &initializer->value;
2423
2424                 ir_node *value = expression_to_firm(initializer_value->value);
2425
2426                 if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
2427                         set_value(declaration->v.value_number, value);
2428                 } else {
2429                         assert(declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2430
2431                         ir_entity *entity = declaration->v.entity;
2432
2433                         set_entity_variability(entity, variability_initialized);
2434                         set_atomic_ent_value(entity, value);
2435                 }
2436         } else {
2437                 assert(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY
2438                                 || declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2439
2440                 ir_entity *entity = declaration->v.entity;
2441                 set_entity_variability(entity, variability_initialized);
2442
2443                 type_t *type = skip_typeref(declaration->type);
2444                 create_initializer_object(initializer, type, entity, NULL, 0);
2445         }
2446 }
2447
2448 static void create_local_variable(declaration_t *declaration)
2449 {
2450         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2451
2452         bool needs_entity = declaration->address_taken;
2453         type_t *type = skip_typeref(declaration->type);
2454
2455         if(is_type_array(type) || is_type_compound(type)) {
2456                 needs_entity = true;
2457         }
2458
2459         if(needs_entity) {
2460                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2461                 create_declaration_entity(declaration,
2462                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
2463                                           frame_type);
2464         } else {
2465                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2466                 declaration->v.value_number   = next_value_number_function;
2467                 ++next_value_number_function;
2468         }
2469
2470         create_initializer(declaration);
2471 }
2472
2473 static void create_local_static_variable(declaration_t *declaration)
2474 {
2475         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2476
2477         type_t    *type        = skip_typeref(declaration->type);
2478         ir_type   *global_type = get_glob_type();
2479         ident     *id          = unique_ident(declaration->symbol->string);
2480         ir_type   *irtype      = get_ir_type(type);
2481         ir_entity *entity      = new_entity(global_type, id, irtype);
2482         set_entity_ld_ident(entity, id);
2483
2484         declaration->declaration_type = DECLARATION_TYPE_GLOBAL_VARIABLE;
2485         declaration->v.entity         = entity;
2486         set_entity_variability(entity, variability_uninitialized);
2487         set_entity_visibility(entity, visibility_local);
2488
2489         ir_graph *old_current_ir_graph = current_ir_graph;
2490         current_ir_graph = get_const_code_irg();
2491
2492         create_initializer(declaration);
2493
2494         assert(current_ir_graph == get_const_code_irg());
2495         current_ir_graph = old_current_ir_graph;
2496 }
2497
2498 static void declaration_statement_to_firm(declaration_statement_t *statement)
2499 {
2500         declaration_t *declaration = statement->declarations_begin;
2501         declaration_t *end         = statement->declarations_end->next;
2502         for( ; declaration != end; declaration = declaration->next) {
2503                 type_t *type = skip_typeref(declaration->type);
2504
2505                 switch ((storage_class_tag_t) declaration->storage_class) {
2506                 case STORAGE_CLASS_TYPEDEF:
2507                         continue;
2508                 case STORAGE_CLASS_STATIC:
2509                         create_local_static_variable(declaration);
2510                         continue;
2511                 case STORAGE_CLASS_ENUM_ENTRY:
2512                         panic("enum entry declaration in local block found");
2513                 case STORAGE_CLASS_EXTERN:
2514                         panic("extern declaration in local block found");
2515                 case STORAGE_CLASS_NONE:
2516                 case STORAGE_CLASS_AUTO:
2517                 case STORAGE_CLASS_REGISTER:
2518                         if(is_type_function(type)) {
2519                                 panic("nested functions not supported yet");
2520                         } else {
2521                                 create_local_variable(declaration);
2522                         }
2523                         continue;
2524                 case STORAGE_CLASS_THREAD:
2525                 case STORAGE_CLASS_THREAD_EXTERN:
2526                 case STORAGE_CLASS_THREAD_STATIC:
2527                         break;
2528                 }
2529                 panic("invalid storage class found");
2530         }
2531 }
2532
2533 static void create_jump_statement(const statement_t *statement,
2534                                   ir_node *target_block)
2535 {
2536         if(get_cur_block() == NULL)
2537                 return;
2538
2539         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
2540         ir_node  *jump = new_d_Jmp(dbgi);
2541         add_immBlock_pred(target_block, jump);
2542
2543         set_cur_block(NULL);
2544 }
2545
2546 static void switch_statement_to_firm(const switch_statement_t *statement)
2547 {
2548         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2549
2550         ir_node *expression  = expression_to_firm(statement->expression);
2551         ir_node *cond        = new_d_Cond(dbgi, expression);
2552         ir_node *break_block = new_immBlock();
2553
2554         set_cur_block(NULL);
2555
2556         ir_node *const old_switch_cond       = current_switch_cond;
2557         ir_node *const old_break_label       = break_label;
2558         const bool     old_saw_default_label = saw_default_label;
2559         current_switch_cond                  = cond;
2560         break_label                          = break_block;
2561
2562         statement_to_firm(statement->body);
2563
2564         if(get_cur_block() != NULL) {
2565                 ir_node *jmp = new_Jmp();
2566                 add_immBlock_pred(break_block, jmp);
2567         }
2568
2569         if (!saw_default_label) {
2570                 set_cur_block(get_nodes_block(cond));
2571                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
2572                                                         MAGIC_DEFAULT_PN_NUMBER);
2573                 add_immBlock_pred(break_block, proj);
2574         }
2575
2576         assert(current_switch_cond == cond);
2577         assert(break_label         == break_block);
2578         current_switch_cond = old_switch_cond;
2579         break_label         = old_break_label;
2580         saw_default_label   = old_saw_default_label;
2581
2582         mature_immBlock(break_block);
2583         set_cur_block(break_block);
2584 }
2585
2586 static long fold_constant(const expression_t *expression)
2587 {
2588         ir_graph *old_current_ir_graph = current_ir_graph;
2589         current_ir_graph = get_const_code_irg();
2590
2591         ir_node *cnst = expression_to_firm(expression);
2592         if(!is_Const(cnst)) {
2593                 panic("couldn't fold constantl");
2594         }
2595         tarval *tv = get_Const_tarval(cnst);
2596         if(!tarval_is_long(tv)) {
2597                 panic("folded constant not an integer");
2598         }
2599
2600         long res = get_tarval_long(tv);
2601
2602         current_ir_graph = old_current_ir_graph;
2603         return res;
2604 }
2605
2606 static void case_label_to_firm(const case_label_statement_t *statement)
2607 {
2608         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2609
2610         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
2611
2612         /* let's create a node and hope firm constant folding creates a Const
2613          * node... */
2614         ir_node *proj;
2615         set_cur_block(get_nodes_block(current_switch_cond));
2616         if(statement->expression) {
2617                 long pn = fold_constant(statement->expression);
2618                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
2619                         /* oops someone detected our cheating... */
2620                         panic("magic default pn used");
2621                 }
2622                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
2623         } else {
2624                 saw_default_label = true;
2625                 proj = new_d_defaultProj(dbgi, current_switch_cond,
2626                                          MAGIC_DEFAULT_PN_NUMBER);
2627         }
2628
2629         ir_node *block = new_immBlock();
2630         if (fallthrough != NULL) {
2631                 add_immBlock_pred(block, fallthrough);
2632         }
2633         add_immBlock_pred(block, proj);
2634         mature_immBlock(block);
2635
2636         statement_to_firm(statement->label_statement);
2637 }
2638
2639 static ir_node *get_label_block(declaration_t *label)
2640 {
2641         assert(label->namespc == NAMESPACE_LABEL);
2642
2643         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
2644                 return label->v.block;
2645         }
2646         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
2647
2648         ir_node *old_cur_block = get_cur_block();
2649         ir_node *block         = new_immBlock();
2650         set_cur_block(old_cur_block);
2651
2652         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
2653         label->v.block          = block;
2654
2655         ARR_APP1(ir_node *, imature_blocks, block);
2656
2657         return block;
2658 }
2659
2660 static void label_to_firm(const label_statement_t *statement)
2661 {
2662         ir_node *block = get_label_block(statement->label);
2663
2664         if(get_cur_block() != NULL) {
2665                 ir_node *jmp = new_Jmp();
2666                 add_immBlock_pred(block, jmp);
2667         }
2668
2669         set_cur_block(block);
2670         keep_alive(block);
2671
2672         statement_to_firm(statement->label_statement);
2673 }
2674
2675 static void goto_to_firm(const goto_statement_t *statement)
2676 {
2677         if(get_cur_block() == NULL)
2678                 return;
2679
2680         ir_node *block = get_label_block(statement->label);
2681         ir_node *jmp   = new_Jmp();
2682         add_immBlock_pred(block, jmp);
2683
2684         set_cur_block(NULL);
2685 }
2686
2687 static void statement_to_firm(statement_t *statement)
2688 {
2689         switch(statement->type) {
2690         case STATEMENT_INVALID:
2691                 panic("invalid statement found");
2692         case STATEMENT_COMPOUND:
2693                 compound_statement_to_firm(&statement->compound);
2694                 return;
2695         case STATEMENT_RETURN:
2696                 return_statement_to_firm(&statement->returns);
2697                 return;
2698         case STATEMENT_EXPRESSION:
2699                 expression_statement_to_firm(&statement->expression);
2700                 return;
2701         case STATEMENT_IF:
2702                 if_statement_to_firm(&statement->ifs);
2703                 return;
2704         case STATEMENT_WHILE:
2705                 while_statement_to_firm(&statement->whiles);
2706                 return;
2707         case STATEMENT_DO_WHILE:
2708                 do_while_statement_to_firm(&statement->do_while);
2709                 return;
2710         case STATEMENT_DECLARATION:
2711                 declaration_statement_to_firm(&statement->declaration);
2712                 return;
2713         case STATEMENT_BREAK:
2714                 create_jump_statement(statement, break_label);
2715                 return;
2716         case STATEMENT_CONTINUE:
2717                 create_jump_statement(statement, continue_label);
2718                 return;
2719         case STATEMENT_SWITCH:
2720                 switch_statement_to_firm(&statement->switchs);
2721                 return;
2722         case STATEMENT_CASE_LABEL:
2723                 case_label_to_firm(&statement->case_label);
2724                 return;
2725         case STATEMENT_FOR:
2726                 for_statement_to_firm(&statement->fors);
2727                 return;
2728         case STATEMENT_LABEL:
2729                 label_to_firm(&statement->label);
2730                 return;
2731         case STATEMENT_GOTO:
2732                 goto_to_firm(&statement->gotos);
2733                 return;
2734         case STATEMENT_ASM:
2735                 break;
2736         }
2737         panic("Statement not implemented\n");
2738 }
2739
2740 static int count_local_declarations(const declaration_t *      decl,
2741                                     const declaration_t *const end)
2742 {
2743         int count = 0;
2744         for (; decl != end; decl = decl->next) {
2745                 const type_t *type = skip_typeref(decl->type);
2746                 switch (type->type) {
2747                         case TYPE_ATOMIC:
2748                         case TYPE_ENUM:
2749                         case TYPE_POINTER:
2750                                 if (!decl->address_taken)
2751                                         ++count;
2752                                 break;
2753
2754                         default: break;
2755                 }
2756         }
2757         return count;
2758 }
2759
2760 static int count_decls_in_stmts(const statement_t *stmt)
2761 {
2762         int count = 0;
2763         for (; stmt != NULL; stmt = stmt->base.next) {
2764                 switch (stmt->type) {
2765                         case STATEMENT_DECLARATION: {
2766                                 const declaration_statement_t *const decl_stmt =
2767                                         (const declaration_statement_t*)stmt;
2768                                 count += count_local_declarations(decl_stmt->declarations_begin,
2769                                                                   decl_stmt->declarations_end->next);
2770                                 break;
2771                         }
2772
2773                         case STATEMENT_COMPOUND: {
2774                                 const compound_statement_t *const comp =
2775                                         (const compound_statement_t*)stmt;
2776                                 count += count_decls_in_stmts(comp->statements);
2777                                 break;
2778                         }
2779
2780                         case STATEMENT_IF: {
2781                                 const if_statement_t *const if_stmt = (const if_statement_t*)stmt;
2782                                 count += count_decls_in_stmts(if_stmt->true_statement);
2783                                 count += count_decls_in_stmts(if_stmt->false_statement);
2784                                 break;
2785                         }
2786
2787                         case STATEMENT_SWITCH: {
2788                                 const switch_statement_t *const switch_stmt =
2789                                         (const switch_statement_t*)stmt;
2790                                 count += count_decls_in_stmts(switch_stmt->body);
2791                                 break;
2792                         }
2793
2794                         case STATEMENT_LABEL: {
2795                                 const label_statement_t *const label_stmt =
2796                                         (const label_statement_t*)stmt;
2797                                 count += count_decls_in_stmts(label_stmt->label_statement);
2798                                 break;
2799                         }
2800
2801                         case STATEMENT_WHILE: {
2802                                 const while_statement_t *const while_stmt =
2803                                         (const while_statement_t*)stmt;
2804                                 count += count_decls_in_stmts(while_stmt->body);
2805                                 break;
2806                         }
2807
2808                         case STATEMENT_DO_WHILE: {
2809                                 const do_while_statement_t *const do_while_stmt =
2810                                         (const do_while_statement_t*)stmt;
2811                                 count += count_decls_in_stmts(do_while_stmt->body);
2812                                 break;
2813                         }
2814
2815                         case STATEMENT_FOR: {
2816                                 const for_statement_t *const for_stmt =
2817                                         (const for_statement_t*)stmt;
2818                                 /* TODO initialisation */
2819                                 count += count_decls_in_stmts(for_stmt->body);
2820                                 break;
2821                         }
2822
2823                         case STATEMENT_ASM:
2824                         case STATEMENT_BREAK:
2825                         case STATEMENT_CASE_LABEL:
2826                         case STATEMENT_CONTINUE:
2827                         case STATEMENT_EXPRESSION:
2828                         case STATEMENT_GOTO:
2829                         case STATEMENT_INVALID:
2830                         case STATEMENT_RETURN:
2831                                 break;
2832                 }
2833         }
2834         return count;
2835 }
2836
2837 static int get_function_n_local_vars(declaration_t *declaration)
2838 {
2839         int count = 0;
2840
2841         /* count parameters */
2842         count += count_local_declarations(declaration->context.declarations, NULL);
2843
2844         /* count local variables declared in body */
2845         count += count_decls_in_stmts(declaration->init.statement);
2846
2847         /* TODO FIXME: Matze: I'm lazy don't want to scan all expressions
2848          * for expression statements... */
2849         count += 10;
2850
2851         return count;
2852 }
2853
2854 static void initialize_function_parameters(declaration_t *declaration)
2855 {
2856         ir_graph        *irg             = current_ir_graph;
2857         ir_node         *args            = get_irg_args(irg);
2858         ir_node         *start_block     = get_irg_start_block(irg);
2859         ir_type         *function_irtype = get_ir_type(declaration->type);
2860
2861         int            n         = 0;
2862         declaration_t *parameter = declaration->context.declarations;
2863         for( ; parameter != NULL; parameter = parameter->next, ++n) {
2864                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
2865                 type_t *type = skip_typeref(parameter->type);
2866
2867                 bool needs_entity = parameter->address_taken;
2868                 assert(!is_type_array(type));
2869                 if(is_type_compound(type)) {
2870                         needs_entity = true;
2871                 }
2872
2873                 if(needs_entity) {
2874                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
2875                         ident     *id     = new_id_from_str(parameter->symbol->string);
2876                         set_entity_ident(entity, id);
2877
2878                         parameter->declaration_type
2879                                 = DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY;
2880                         parameter->v.entity = entity;
2881                         continue;
2882                 }
2883
2884                 ir_mode *mode = get_ir_mode(parameter->type);
2885                 long     pn   = n;
2886                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2887
2888                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2889                 parameter->v.value_number   = next_value_number_function;
2890                 ++next_value_number_function;
2891
2892                 set_value(parameter->v.value_number, proj);
2893         }
2894 }
2895
2896 static void create_function(declaration_t *declaration)
2897 {
2898         ir_entity *function_entity = get_function_entity(declaration);
2899
2900         if(declaration->init.statement == NULL)
2901                 return;
2902
2903         current_function_decl = declaration;
2904         current_function_name = NULL;
2905
2906         assert(imature_blocks == NULL);
2907         imature_blocks = NEW_ARR_F(ir_node*, 0);
2908
2909         int       n_local_vars = get_function_n_local_vars(declaration);
2910         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
2911         ir_node  *first_block  = get_cur_block();
2912
2913         next_value_number_function = 0;
2914         initialize_function_parameters(declaration);
2915
2916         statement_to_firm(declaration->init.statement);
2917
2918         ir_node *end_block = get_irg_end_block(irg);
2919
2920         /* do we have a return statement yet? */
2921         if(get_cur_block() != NULL) {
2922                 type_t *type = skip_typeref(declaration->type);
2923                 assert(is_type_function(type));
2924                 const function_type_t *func_type   = &type->function;
2925                 const type_t          *return_type
2926                         = skip_typeref(func_type->return_type);
2927
2928                 ir_node *ret;
2929                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
2930                         ret = new_Return(get_store(), 0, NULL);
2931                 } else {
2932                         ir_mode *mode;
2933                         if(is_type_scalar(return_type)) {
2934                                 mode = get_ir_mode(func_type->return_type);
2935                         } else {
2936                                 mode = mode_P_data;
2937                         }
2938
2939                         ir_node *in[1];
2940                         // §5.1.2.2.3 main implicitly returns 0
2941                         if (strcmp(declaration->symbol->string, "main") == 0) {
2942                                 in[0] = new_Const(mode, get_mode_null(mode));
2943                         } else {
2944                                 in[0] = new_Unknown(mode);
2945                         }
2946                         ret = new_Return(get_store(), 1, in);
2947                 }
2948                 add_immBlock_pred(end_block, ret);
2949         }
2950
2951         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2952                 mature_immBlock(imature_blocks[i]);
2953         }
2954         DEL_ARR_F(imature_blocks);
2955         imature_blocks = NULL;
2956
2957         mature_immBlock(first_block);
2958         mature_immBlock(end_block);
2959
2960         irg_finalize_cons(irg);
2961
2962         /* finalize the frame type */
2963         ir_type *frame_type = get_irg_frame_type(irg);
2964         int      n          = get_compound_n_members(frame_type);
2965         int      align_all  = 4;
2966         int      offset     = 0;
2967         for(int i = 0; i < n; ++i) {
2968                 ir_entity *entity      = get_compound_member(frame_type, i);
2969                 ir_type   *entity_type = get_entity_type(entity);
2970
2971                 int align = get_type_alignment_bytes(entity_type);
2972                 if(align > align_all)
2973                         align_all = align;
2974                 int misalign = 0;
2975                 if(align > 0) {
2976                         misalign  = offset % align;
2977                         if(misalign > 0) {
2978                                 offset += align - misalign;
2979                         }
2980                 }
2981
2982                 set_entity_offset(entity, offset);
2983                 offset += get_type_size_bytes(entity_type);
2984         }
2985         set_type_size_bytes(frame_type, offset);
2986         set_type_alignment_bytes(frame_type, align_all);
2987         set_type_state(frame_type, layout_fixed);
2988
2989         irg_vrfy(irg);
2990 }
2991
2992 static void create_global_variable(declaration_t *declaration)
2993 {
2994         ir_visibility  vis;
2995         ir_type       *var_type;
2996         switch ((storage_class_tag_t)declaration->storage_class) {
2997                 case STORAGE_CLASS_STATIC:
2998                         vis = visibility_local;
2999                         goto global_var;
3000
3001                 case STORAGE_CLASS_EXTERN:
3002                         vis = visibility_external_allocated;
3003                         goto global_var;
3004
3005                 case STORAGE_CLASS_NONE:
3006                         vis = visibility_external_visible;
3007                         goto global_var;
3008
3009                 case STORAGE_CLASS_THREAD:
3010                         vis = visibility_external_visible;
3011                         goto tls_var;
3012
3013                 case STORAGE_CLASS_THREAD_EXTERN:
3014                         vis = visibility_external_allocated;
3015                         goto tls_var;
3016
3017                 case STORAGE_CLASS_THREAD_STATIC:
3018                         vis = visibility_local;
3019                         goto tls_var;
3020
3021 tls_var:
3022                         var_type = get_tls_type();
3023                         goto create_var;
3024
3025 global_var:
3026                         var_type = get_glob_type();
3027                         goto create_var;
3028
3029 create_var:
3030                         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
3031                                                   var_type);
3032                         set_entity_visibility(declaration->v.entity, vis);
3033
3034                         current_ir_graph = get_const_code_irg();
3035                         create_initializer(declaration);
3036                         return;
3037
3038                 case STORAGE_CLASS_TYPEDEF:
3039                 case STORAGE_CLASS_AUTO:
3040                 case STORAGE_CLASS_REGISTER:
3041                 case STORAGE_CLASS_ENUM_ENTRY:
3042                         break;
3043         }
3044         panic("Invalid storage class for global variable");
3045 }
3046
3047 static void context_to_firm(context_t *context)
3048 {
3049         /* first pass: create declarations */
3050         declaration_t *declaration = context->declarations;
3051         for( ; declaration != NULL; declaration = declaration->next) {
3052                 if(declaration->namespc != NAMESPACE_NORMAL)
3053                         continue;
3054                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3055                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3056                         continue;
3057                 if(declaration->symbol == NULL)
3058                         continue;
3059
3060                 type_t *type = skip_typeref(declaration->type);
3061                 if(is_type_function(type)) {
3062                         get_function_entity(declaration);
3063                 } else {
3064                         create_global_variable(declaration);
3065                 }
3066         }
3067
3068         /* second pass: create code */
3069         declaration = context->declarations;
3070         for( ; declaration != NULL; declaration = declaration->next) {
3071                 if(declaration->namespc != NAMESPACE_NORMAL)
3072                         continue;
3073                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3074                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3075                         continue;
3076                 if(declaration->symbol == NULL)
3077                         continue;
3078
3079                 type_t *type = declaration->type;
3080                 if(type->type != TYPE_FUNCTION)
3081                         continue;
3082
3083                 create_function(declaration);
3084         }
3085 }
3086
3087 void translation_unit_to_firm(translation_unit_t *unit)
3088 {
3089         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
3090         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
3091         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
3092
3093         ir_type_int        = get_ir_type(type_int);
3094         ir_type_const_char = get_ir_type(type_const_char);
3095         ir_type_wchar_t    = get_ir_type(type_wchar_t);
3096         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
3097                                                        type in firm */
3098
3099         type_void->base.firm_type = ir_type_void;
3100
3101         /* just to be sure */
3102         continue_label      = NULL;
3103         break_label         = NULL;
3104         current_switch_cond = NULL;
3105
3106         context_to_firm(& unit->context);
3107 }