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 #include "lang_features.h"
  21 #include "driver/firm_opt.h"
  22 #include "driver/firm_cmdline.h"
  23
  24 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  25
  26 static ir_type *ir_type_const_char;
  27 static ir_type *ir_type_wchar_t;
  28 static ir_type *ir_type_void;
  29 static ir_type *ir_type_int;
  30
  31 static type_t *type_const_char;
  32 static type_t *type_void;
  33 static type_t *type_int;
  34
  35 static int       next_value_number_function;
  36 static ir_node  *continue_label;
  37 static ir_node  *break_label;
  38 static ir_node  *current_switch_cond;
  39 static bool      saw_default_label;
  40 static ir_node **imature_blocks;
  41
  42 static const declaration_t *current_function_decl;
  43 static ir_node             *current_function_name;
  44
  45 static struct obstack asm_obst;
  46
  47 typedef enum declaration_kind_t {
  48         DECLARATION_KIND_UNKNOWN,
  49         DECLARATION_KIND_FUNCTION,
  50         DECLARATION_KIND_GLOBAL_VARIABLE,
  51         DECLARATION_KIND_LOCAL_VARIABLE,
  52         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  53         DECLARATION_KIND_COMPOUND_MEMBER,
  54         DECLARATION_KIND_LABEL_BLOCK,
  55         DECLARATION_KIND_ENUM_ENTRY
  56 } declaration_kind_t;
  57
  58 static ir_type *get_ir_type(type_t *type);
  59 static int count_decls_in_stmts(const statement_t *stmt);
  60
  61 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  62 {
  63         (void) pos;
  64 #if 0
  65         const declaration_t *declaration = & value_numbers[pos]->declaration;
  66
  67         print_warning_prefix(declaration->source_position);
  68         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  69                         declaration->symbol->string);
  70 #endif
  71         fprintf(stderr, "Some variable might be used uninitialized\n");
  72         return new_r_Unknown(irg, mode);
  73 }
  74
  75 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  76 {
  77         const source_position_t *pos = (const source_position_t*) dbg;
  78         if(pos == NULL)
  79                 return 0;
  80         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  81                                    pos->linenr);
  82 }
  83
  84 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
  85 {
  86         const source_position_t *pos = (const source_position_t*) dbg;
  87         if(pos == NULL)
  88                 return NULL;
  89         if(line != NULL)
  90                 *line = pos->linenr;
  91         return pos->input_name;
  92 }
  93
  94 static dbg_info *get_dbg_info(const source_position_t *pos)
  95 {
  96         return (dbg_info*) pos;
  97 }
  98
  99 static unsigned unique_id = 0;
 100
 101 static ident *unique_ident(const char *tag)
 102 {
 103         char buf[256];
 104
 105         snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
 106         unique_id++;
 107         return new_id_from_str(buf);
 108 }
 109
 110 /**
 111  * Return the signed integer mode of size bytes.
 112  *
 113  * @param size   the size
 114  */
 115 static ir_mode *get_smode(unsigned size)
 116 {
 117         static ir_mode *s_modes[16 + 1] = {0, };
 118         ir_mode *res;
 119
 120         if (size <= 0 || size > 16)
 121                 return NULL;
 122
 123         res = s_modes[size];
 124         if (res == NULL) {
 125                 unsigned bits;
 126         char name[32];
 127
 128         bits = size * 8;
 129         snprintf(name, sizeof(name), "i%u", bits);
 130         res = new_ir_mode(name, irms_int_number, bits, 1, irma_twos_complement,
 131                                         bits <= machine_size ? machine_size : bits );
 132
 133                 s_modes[size] = res;
 134         }
 135         return res;
 136 }
 137
 138 /**
 139  * Return the unsigned integer mode of size bytes.
 140  *
 141  * @param size  the size
 142  */
 143 static ir_mode *get_umode(unsigned size)
 144 {
 145         static ir_mode *u_modes[16 + 1] = {0, };
 146         ir_mode *res;
 147
 148         if (size <= 0 || size > 16)
 149                 return NULL;
 150
 151         res = u_modes[size];
 152         if (res == NULL) {
 153                 unsigned bits;
 154                 char name[32];
 155
 156                 bits = size * 8;
 157                 snprintf(name, sizeof(name), "u%u", bits);
 158                 res = new_ir_mode(name, irms_int_number, bits, 0, irma_twos_complement,
 159                                                 bits <= machine_size ? machine_size : bits );
 160
 161                 u_modes[size] = res;
 162         }
 163         return res;
 164 }
 165
 166 /**
 167  * Return the pointer mode of size bytes.
 168  *
 169  * @param size  the size
 170  */
 171 static ir_mode *get_ptrmode(unsigned size, char *name)
 172 {
 173         static ir_mode *p_modes[16 + 1] = {0, };
 174         ir_mode *res;
 175
 176         if (size <= 0 || size > 16)
 177                 return NULL;
 178
 179         res = p_modes[size];
 180         if (res == NULL) {
 181                 unsigned bits;
 182                 char buf[32];
 183
 184                 bits = size * 8;
 185                 if (name == NULL) {
 186                         snprintf(buf, sizeof(buf), "p%u", bits);
 187                         name = buf;
 188                 }
 189                 res = new_ir_mode(name, irms_reference, bits, 0, irma_twos_complement,
 190                                                 bits <= machine_size ? machine_size : bits);
 191
 192                 p_modes[size] = res;
 193
 194                 set_reference_mode_signed_eq(res, get_smode(size));
 195                 set_reference_mode_unsigned_eq(res, get_umode(size));
 196         }
 197         return res;
 198 }
 199
 200 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST];
 201
 202 static ir_mode *mode_int, *mode_uint;
 203
 204 /**
 205  * Initialises the atomic modes depending on the machine size.
 206  */
 207 static void init_atomic_modes(void) {
 208         unsigned int_size   = machine_size < 32 ? 2 : 4;
 209         unsigned long_size  = machine_size < 64 ? 4 : 8;
 210         unsigned llong_size = machine_size < 32 ? 4 : 8;
 211
 212         /* firm has no real void... */
 213         _atomic_modes[ATOMIC_TYPE_VOID]        = mode_T;
 214         _atomic_modes[ATOMIC_TYPE_CHAR]        = char_is_signed ? get_smode(1) : get_umode(1);
 215         _atomic_modes[ATOMIC_TYPE_SCHAR]       = get_smode(1);
 216         _atomic_modes[ATOMIC_TYPE_UCHAR]       = get_umode(1);
 217         _atomic_modes[ATOMIC_TYPE_SHORT]       = get_smode(2);
 218         _atomic_modes[ATOMIC_TYPE_USHORT]      = get_umode(2);
 219         _atomic_modes[ATOMIC_TYPE_INT]         = get_smode(int_size);
 220         _atomic_modes[ATOMIC_TYPE_UINT]        = get_umode(int_size);
 221         _atomic_modes[ATOMIC_TYPE_LONG]        = get_smode(long_size);
 222         _atomic_modes[ATOMIC_TYPE_ULONG]       = get_umode(long_size);
 223         _atomic_modes[ATOMIC_TYPE_LONGLONG]    = get_smode(llong_size);
 224         _atomic_modes[ATOMIC_TYPE_ULONGLONG]   = get_umode(llong_size);
 225         _atomic_modes[ATOMIC_TYPE_FLOAT]       = mode_F;
 226         _atomic_modes[ATOMIC_TYPE_DOUBLE]      = mode_D;
 227         _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE] = mode_E;
 228         _atomic_modes[ATOMIC_TYPE_BOOL]        = get_umode(int_size);
 229
 230 #ifdef PROVIDE_COMPLEX
 231         _atomic_modes[ATOMIC_TYPE_BOOL]                  = _atomic_modes[ATOMIC_TYPE_INT];
 232         _atomic_modes[ATOMIC_TYPE_FLOAT_IMAGINARY]       = _atomic_modes[ATOMIC_TYPE_FLOAT];
 233         _atomic_modes[ATOMIC_TYPE_DOUBLE_IMAGINARY]      = _atomic_modes[ATOMIC_TYPE_DOUBLE];
 234         _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY] = _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE];
 235 #endif
 236
 237         /* Hmm, pointers should be machine size */
 238         set_modeP_data(get_ptrmode(machine_size >> 3, NULL));
 239         set_modeP_code(get_ptrmode(machine_size >> 3, NULL));
 240
 241         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 242         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 243 }
 244
 245 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 246 {
 247         ir_mode *res = NULL;
 248         if ((unsigned)atomic_type->atype < (unsigned)ATOMIC_TYPE_LAST)
 249                 res = _atomic_modes[(unsigned)atomic_type->atype];
 250         if (res == NULL)
 251                 panic("Encountered unknown atomic type");
 252         return res;
 253 }
 254
 255 static unsigned get_type_size(type_t *type);
 256
 257 static unsigned get_atomic_type_size(const atomic_type_t *type)
 258 {
 259         switch(type->atype) {
 260         case ATOMIC_TYPE_CHAR:
 261         case ATOMIC_TYPE_SCHAR:
 262         case ATOMIC_TYPE_UCHAR:
 263                 return 1;
 264
 265         case ATOMIC_TYPE_SHORT:
 266         case ATOMIC_TYPE_USHORT:
 267                 return 2;
 268
 269         case ATOMIC_TYPE_BOOL:
 270         case ATOMIC_TYPE_INT:
 271         case ATOMIC_TYPE_UINT:
 272                 return machine_size >> 3;
 273
 274         case ATOMIC_TYPE_LONG:
 275         case ATOMIC_TYPE_ULONG:
 276                 return machine_size > 16 ? machine_size >> 3 : 4;
 277
 278         case ATOMIC_TYPE_LONGLONG:
 279         case ATOMIC_TYPE_ULONGLONG:
 280                 return machine_size > 16 ? 8 : 4;
 281
 282         case ATOMIC_TYPE_FLOAT:
 283                 return 4;
 284
 285         case ATOMIC_TYPE_DOUBLE:
 286                 return 8;
 287
 288         case ATOMIC_TYPE_LONG_DOUBLE:
 289                 return 12;
 290
 291         case ATOMIC_TYPE_VOID:
 292                 return 1;
 293
 294         case ATOMIC_TYPE_INVALID:
 295         case ATOMIC_TYPE_LAST:
 296                 break;
 297         }
 298         panic("Trying to determine size of invalid atomic type");
 299 }
 300
 301 static unsigned get_compound_type_size(compound_type_t *type)
 302 {
 303         ir_type *irtype = get_ir_type((type_t*) type);
 304         return get_type_size_bytes(irtype);
 305 }
 306
 307 static unsigned get_array_type_size(array_type_t *type)
 308 {
 309         ir_type *irtype = get_ir_type((type_t*) type);
 310         return get_type_size_bytes(irtype);
 311 }
 312
 313
 314 static unsigned get_type_size(type_t *type)
 315 {
 316         type = skip_typeref(type);
 317
 318         switch(type->kind) {
 319         case TYPE_ATOMIC:
 320                 return get_atomic_type_size(&type->atomic);
 321         case TYPE_ENUM:
 322                 return get_mode_size_bytes(mode_int);
 323         case TYPE_COMPOUND_UNION:
 324         case TYPE_COMPOUND_STRUCT:
 325                 return get_compound_type_size(&type->compound);
 326         case TYPE_FUNCTION:
 327                 /* just a pointer to the function */
 328                 return get_mode_size_bytes(mode_P_code);
 329         case TYPE_POINTER:
 330                 return get_mode_size_bytes(mode_P_data);
 331         case TYPE_ARRAY:
 332                 return get_array_type_size(&type->array);
 333         case TYPE_BUILTIN:
 334                 return get_type_size(type->builtin.real_type);
 335         case TYPE_BITFIELD:
 336                 panic("type size of bitfield request");
 337         case TYPE_TYPEDEF:
 338         case TYPE_TYPEOF:
 339         case TYPE_INVALID:
 340                 break;
 341         }
 342         panic("Trying to determine size of invalid type");
 343 }
 344
 345 static unsigned count_parameters(const function_type_t *function_type)
 346 {
 347         unsigned count = 0;
 348
 349         function_parameter_t *parameter = function_type->parameters;
 350         for ( ; parameter != NULL; parameter = parameter->next) {
 351                 ++count;
 352         }
 353
 354         return count;
 355 }
 356
 357
 358
 359
 360 static long fold_constant(const expression_t *expression);
 361
 362 static ir_type *create_atomic_type(const atomic_type_t *type)
 363 {
 364         ir_mode *mode   = get_atomic_mode(type);
 365         ident   *id     = get_mode_ident(mode);
 366         ir_type *irtype = new_type_primitive(id, mode);
 367
 368         if(type->atype == ATOMIC_TYPE_LONG_DOUBLE) {
 369                 set_type_alignment_bytes(irtype, 4);
 370         }
 371
 372         return irtype;
 373 }
 374
 375 static ir_type *create_method_type(const function_type_t *function_type)
 376 {
 377         type_t  *return_type  = function_type->return_type;
 378
 379         ident   *id           = unique_ident("functiontype");
 380         int      n_parameters = count_parameters(function_type);
 381         int      n_results    = return_type == type_void ? 0 : 1;
 382         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 383
 384         if(return_type != type_void) {
 385                 ir_type *restype = get_ir_type(return_type);
 386                 set_method_res_type(irtype, 0, restype);
 387         }
 388
 389         function_parameter_t *parameter = function_type->parameters;
 390         int                   n         = 0;
 391         for( ; parameter != NULL; parameter = parameter->next) {
 392                 ir_type *p_irtype = get_ir_type(parameter->type);
 393                 set_method_param_type(irtype, n, p_irtype);
 394                 ++n;
 395         }
 396
 397         if(function_type->variadic || function_type->unspecified_parameters) {
 398                 set_method_variadicity(irtype, variadicity_variadic);
 399         }
 400
 401         return irtype;
 402 }
 403
 404 static ir_type *create_pointer_type(pointer_type_t *type)
 405 {
 406         type_t  *points_to = type->points_to;
 407         ir_type *ir_points_to;
 408         /* Avoid endless recursion if the points_to type contains this poiner type
 409          * again (might be a struct). We therefore first create a void* pointer
 410          * and then set the real points_to type
 411          */
 412         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 413                                             ir_type_void, mode_P_data);
 414         type->type.firm_type  = ir_type;
 415
 416         ir_points_to = get_ir_type(points_to);
 417         set_pointer_points_to_type(ir_type, ir_points_to);
 418
 419         return ir_type;
 420 }
 421
 422 static ir_type *create_array_type(array_type_t *type)
 423 {
 424         type_t  *element_type    = type->element_type;
 425         ir_type *ir_element_type = get_ir_type(element_type);
 426
 427         ident   *id      = unique_ident("array");
 428         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 429
 430         if(type->size != NULL) {
 431                 int n_elements = fold_constant(type->size);
 432
 433                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 434
 435                 size_t elemsize = get_type_size_bytes(ir_element_type);
 436                 int align = get_type_alignment_bytes(ir_element_type);
 437                 if(elemsize % align > 0) {
 438                         elemsize += align - (elemsize % align);
 439                 }
 440                 set_type_size_bytes(ir_type, n_elements * elemsize);
 441                 set_type_alignment_bytes(ir_type, align);
 442                 set_type_state(ir_type, layout_fixed);
 443         } else {
 444                 set_array_lower_bound_int(ir_type, 0, 0);
 445         }
 446
 447         return ir_type;
 448 }
 449
 450 #define INVALID_TYPE ((ir_type_ptr)-1)
 451
 452 static ir_type *create_struct_type(compound_type_t *type)
 453 {
 454         symbol_t *symbol = type->declaration->symbol;
 455         ident    *id;
 456         if(symbol != NULL) {
 457                 id = unique_ident(symbol->string);
 458         } else {
 459                 id = unique_ident("__anonymous_struct");
 460         }
 461         ir_type *irtype = new_type_struct(id);
 462
 463         type->type.firm_type = irtype;
 464
 465         size_t align_all  = 1;
 466         size_t offset     = 0;
 467         size_t bit_offset = 0;
 468         declaration_t *entry = type->declaration->context.declarations;
 469         for( ; entry != NULL; entry = entry->next) {
 470                 if(entry->namespc != NAMESPACE_NORMAL)
 471                         continue;
 472
 473                 type_t *entry_type = skip_typeref(entry->type);
 474
 475                 ir_type *base_irtype;
 476                 if(entry_type->kind == TYPE_BITFIELD) {
 477                         base_irtype = get_ir_type(entry_type->bitfield.base);
 478                 } else {
 479                         base_irtype = get_ir_type(entry_type);
 480                 }
 481
 482                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 483                 size_t misalign        = offset % entry_alignment;
 484
 485                 dbg_info  *dbgi   = get_dbg_info(&entry->source_position);
 486                 ir_entity *entity = NULL;
 487                 if(entry->symbol != NULL) {
 488                         ident   *ident        = new_id_from_str(entry->symbol->string);
 489                         ir_type *entry_irtype = get_ir_type(entry_type);
 490
 491                         entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 492                 } else {
 493                         /* only bitfields are allowed to be anonymous */
 494                         assert(entry_type->kind == TYPE_BITFIELD);
 495                 }
 496
 497                 size_t base;
 498                 size_t bits_remainder;
 499                 if(entry_type->kind == TYPE_BITFIELD) {
 500                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 501                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 502
 503                         if(size_bits > rest_size_bits) {
 504                                 /* start a new bucket */
 505                                 offset     += entry_alignment - misalign;
 506                                 bit_offset  = 0;
 507
 508                                 base           = offset;
 509                                 bits_remainder = 0;
 510                         } else {
 511                                 /* put into current bucket */
 512                                 base           = offset - misalign;
 513                                 bits_remainder = misalign * 8 + bit_offset;
 514                         }
 515
 516                         offset     += size_bits / 8;
 517                         bit_offset  = bit_offset + (size_bits % 8);
 518                 } else {
 519                         size_t entry_size = get_type_size_bytes(base_irtype);
 520                         if(misalign > 0)
 521                                 offset += entry_size - misalign;
 522
 523                         base           = offset;
 524                         bits_remainder = 0;
 525                         offset        += entry_size;
 526                         bit_offset     = 0;
 527                 }
 528
 529                 if(entry_alignment > align_all) {
 530                         if(entry_alignment % align_all != 0) {
 531                                 panic("uneven alignments not supported yet");
 532                         }
 533                         align_all = entry_alignment;
 534                 }
 535
 536                 if(entity != NULL) {
 537                         set_entity_offset(entity, base);
 538                         set_entity_offset_bits_remainder(entity,
 539                                                          (unsigned char) bits_remainder);
 540                         add_struct_member(irtype, entity);
 541                         entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 542                         entry->v.entity         = entity;
 543                 }
 544         }
 545
 546         size_t misalign = offset % align_all;
 547         if(misalign > 0) {
 548                 offset += align_all - misalign;
 549         }
 550         set_type_alignment_bytes(irtype, align_all);
 551         set_type_size_bytes(irtype, offset);
 552         set_type_state(irtype, layout_fixed);
 553
 554         return irtype;
 555 }
 556
 557 static ir_type *create_union_type(compound_type_t *type)
 558 {
 559         declaration_t *declaration = type->declaration;
 560         symbol_t      *symbol      = declaration->symbol;
 561         ident         *id;
 562         if(symbol != NULL) {
 563                 id = unique_ident(symbol->string);
 564         } else {
 565                 id = unique_ident("__anonymous_union");
 566         }
 567         ir_type *irtype = new_type_union(id);
 568
 569         type->type.firm_type = irtype;
 570
 571         int align_all = 1;
 572         int size      = 0;
 573         declaration_t *entry = declaration->context.declarations;
 574         for( ; entry != NULL; entry = entry->next) {
 575                 if(entry->namespc != NAMESPACE_NORMAL)
 576                         continue;
 577
 578                 ident   *ident         = new_id_from_str(entry->symbol->string);
 579                 ir_type *entry_ir_type = get_ir_type(entry->type);
 580
 581                 int entry_size      = get_type_size_bytes(entry_ir_type);
 582                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 583
 584                 dbg_info  *const dbgi   = get_dbg_info(&entry->source_position);
 585                 ir_entity *const entity = new_d_entity(irtype, ident, entry_ir_type,
 586                                                        dbgi);
 587                 add_union_member(irtype, entity);
 588                 set_entity_offset(entity, 0);
 589                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 590                 entry->v.entity         = entity;
 591
 592                 if(entry_size > size) {
 593                         size = entry_size;
 594                 }
 595                 if(entry_alignment > align_all) {
 596                         if(entry_alignment % align_all != 0) {
 597                                 panic("Uneven alignments not supported yet");
 598                         }
 599                         align_all = entry_alignment;
 600                 }
 601         }
 602
 603         set_type_alignment_bytes(irtype, align_all);
 604         set_type_size_bytes(irtype, size);
 605         set_type_state(irtype, layout_fixed);
 606
 607         return irtype;
 608 }
 609
 610 static ir_node *expression_to_firm(const expression_t *expression);
 611 static inline ir_mode *get_ir_mode(type_t *type);
 612
 613 static ir_type *create_enum_type(enum_type_t *const type)
 614 {
 615         type->type.firm_type = ir_type_int;
 616
 617         ir_mode *const mode    = get_ir_mode((type_t*) type);
 618         tarval  *const one     = get_mode_one(mode);
 619         tarval  *      tv_next = get_tarval_null(mode);
 620
 621         declaration_t *declaration = type->declaration->next;
 622         for (; declaration != NULL; declaration = declaration->next) {
 623                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 624                         break;
 625
 626                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 627
 628                 expression_t *const init = declaration->init.enum_value;
 629                 if (init != NULL) {
 630                         ir_node *const cnst = expression_to_firm(init);
 631                         if (!is_Const(cnst)) {
 632                                 panic("couldn't fold constant");
 633                         }
 634                         tv_next = get_Const_tarval(cnst);
 635                 }
 636                 declaration->v.enum_val = tv_next;
 637                 tv_next = tarval_add(tv_next, one);
 638         }
 639
 640         return ir_type_int;
 641 }
 642
 643 /**
 644  * Return the signed integer type of size bits.
 645  *
 646  * @param size   the size
 647  */
 648 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 649                                                  unsigned size)
 650 {
 651         static ir_mode *s_modes[64 + 1] = {NULL, };
 652         ir_type *res;
 653         ir_mode *mode;
 654
 655         if (size <= 0 || size > 64)
 656                 return NULL;
 657
 658         mode = s_modes[size];
 659         if (mode == NULL) {
 660                 char name[32];
 661
 662                 snprintf(name, sizeof(name), "bf_I%u", size);
 663                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 664                                    size <= 32 ? 32 : size );
 665                 s_modes[size] = mode;
 666         }
 667
 668         char name[32];
 669         snprintf(name, sizeof(name), "I%u", size);
 670         ident *id = new_id_from_str(name);
 671         res = new_type_primitive(mangle_u(get_type_ident(base_tp), id), mode);
 672         set_primitive_base_type(res, base_tp);
 673
 674         return res;
 675 }
 676
 677 /**
 678  * Return the unsigned integer type of size bits.
 679  *
 680  * @param size   the size
 681  */
 682 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 683                                                    unsigned size)
 684 {
 685         static ir_mode *u_modes[64 + 1] = {NULL, };
 686         ir_type *res;
 687         ir_mode *mode;
 688
 689         if (size <= 0 || size > 64)
 690                 return NULL;
 691
 692         mode = u_modes[size];
 693         if (mode == NULL) {
 694                 char name[32];
 695
 696                 snprintf(name, sizeof(name), "bf_U%u", size);
 697                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 698                                    size <= 32 ? 32 : size );
 699                 u_modes[size] = mode;
 700         }
 701
 702         char name[32];
 703
 704         snprintf(name, sizeof(name), "U%u", size);
 705         ident *id = new_id_from_str(name);
 706         res = new_type_primitive(mangle_u(get_type_ident(base_tp), id), mode);
 707         set_primitive_base_type(res, base_tp);
 708
 709         return res;
 710 }
 711
 712 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 713 {
 714         type_t *base = skip_typeref(type->base);
 715         assert(base->kind == TYPE_ATOMIC);
 716
 717         ir_type *irbase = get_ir_type(base);
 718
 719         unsigned size = fold_constant(type->size);
 720
 721         assert(!is_type_floating(base));
 722         if(is_type_signed(base)) {
 723                 return get_signed_int_type_for_bit_size(irbase, size);
 724         } else {
 725                 return get_unsigned_int_type_for_bit_size(irbase, size);
 726         }
 727 }
 728
 729 static ir_type *get_ir_type(type_t *type)
 730 {
 731         assert(type != NULL);
 732
 733         type = skip_typeref(type);
 734
 735         if(type->base.firm_type != NULL) {
 736                 assert(type->base.firm_type != INVALID_TYPE);
 737                 return type->base.firm_type;
 738         }
 739
 740         ir_type *firm_type = NULL;
 741         switch(type->kind) {
 742         case TYPE_ATOMIC:
 743                 firm_type = create_atomic_type(&type->atomic);
 744                 break;
 745         case TYPE_FUNCTION:
 746                 firm_type = create_method_type(&type->function);
 747                 break;
 748         case TYPE_POINTER:
 749                 firm_type = create_pointer_type(&type->pointer);
 750                 break;
 751         case TYPE_ARRAY:
 752                 firm_type = create_array_type(&type->array);
 753                 break;
 754         case TYPE_COMPOUND_STRUCT:
 755                 firm_type = create_struct_type(&type->compound);
 756                 break;
 757         case TYPE_COMPOUND_UNION:
 758                 firm_type = create_union_type(&type->compound);
 759                 break;
 760         case TYPE_ENUM:
 761                 firm_type = create_enum_type(&type->enumt);
 762                 break;
 763         case TYPE_BUILTIN:
 764                 firm_type = get_ir_type(type->builtin.real_type);
 765                 break;
 766         case TYPE_BITFIELD:
 767                 firm_type = create_bitfield_type(&type->bitfield);
 768                 break;
 769
 770         case TYPE_TYPEOF:
 771         case TYPE_TYPEDEF:
 772         case TYPE_INVALID:
 773                 break;
 774         }
 775         if(firm_type == NULL)
 776                 panic("unknown type found");
 777
 778         type->base.firm_type = firm_type;
 779         return firm_type;
 780 }
 781
 782 static inline ir_mode *get_ir_mode(type_t *type)
 783 {
 784         ir_type *irtype = get_ir_type(type);
 785
 786         /* firm doesn't report a mode for arrays somehow... */
 787         if(is_Array_type(irtype)) {
 788                 return mode_P_data;
 789         }
 790
 791         ir_mode *mode = get_type_mode(irtype);
 792         assert(mode != NULL);
 793         return mode;
 794 }
 795
 796 static ident *predef_idents[rts_max];
 797
 798 /** Names of the runtime functions. */
 799 static const struct {
 800         int        id;           /**< the rts id */
 801         int        n_res;        /**< number of return values */
 802         const char *name;        /**< the name of the rts function */
 803         int        n_params;     /**< number of parameters */
 804         unsigned   flags;        /**< language flags */
 805 } rts_data[] = {
 806         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 807         { rts_abort,      0, "abort",        0, _C89 },
 808         { rts_abs,        1, "abs",          1, _C89 },
 809         { rts_labs,       1, "labs",         1, _C89 },
 810         { rts_llabs,      1, "llabs",        1, _C99 },
 811         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 812
 813         { rts_fabs,       1, "fabs",         1, _C89 },
 814         { rts_sqrt,       1, "sqrt",         1, _C89 },
 815         { rts_cbrt,       1, "cbrt",         1, _C99 },
 816         { rts_exp,        1, "exp",          1, _C89 },
 817         { rts_exp2,       1, "exp2",         1, _C89 },
 818         { rts_exp10,      1, "exp10",        1, _GNUC },
 819         { rts_log,        1, "log",          1, _C89 },
 820         { rts_log2,       1, "log2",         1, _C89 },
 821         { rts_log10,      1, "log10",        1, _C89 },
 822         { rts_pow,        1, "pow",          2, _C89 },
 823         { rts_sin,        1, "sin",          1, _C89 },
 824         { rts_cos,        1, "cos",          1, _C89 },
 825         { rts_tan,        1, "tan",          1, _C89 },
 826         { rts_asin,       1, "asin",         1, _C89 },
 827         { rts_acos,       1, "acos",         1, _C89 },
 828         { rts_atan,       1, "atan",         1, _C89 },
 829         { rts_sinh,       1, "sinh",         1, _C89 },
 830         { rts_cosh,       1, "cosh",         1, _C89 },
 831         { rts_tanh,       1, "tanh",         1, _C89 },
 832
 833         { rts_fabsf,      1, "fabsf",        1, _C99 },
 834         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 835         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 836         { rts_expf,       1, "expf",         1, _C99 },
 837         { rts_exp2f,      1, "exp2f",        1, _C99 },
 838         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 839         { rts_logf,       1, "logf",         1, _C99 },
 840         { rts_log2f,      1, "log2f",        1, _C99 },
 841         { rts_log10f,     1, "log10f",       1, _C99 },
 842         { rts_powf,       1, "powf",         2, _C99 },
 843         { rts_sinf,       1, "sinf",         1, _C99 },
 844         { rts_cosf,       1, "cosf",         1, _C99 },
 845         { rts_tanf,       1, "tanf",         1, _C99 },
 846         { rts_asinf,      1, "asinf",        1, _C99 },
 847         { rts_acosf,      1, "acosf",        1, _C99 },
 848         { rts_atanf,      1, "atanf",        1, _C99 },
 849         { rts_sinhf,      1, "sinhf",        1, _C99 },
 850         { rts_coshf,      1, "coshf",        1, _C99 },
 851         { rts_tanhf,      1, "tanhf",        1, _C99 },
 852
 853         { rts_fabsl,      1, "fabsl",        1, _C99 },
 854         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 855         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 856         { rts_expl,       1, "expl",         1, _C99 },
 857         { rts_exp2l,      1, "exp2l",        1, _C99 },
 858         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 859         { rts_logl,       1, "logl",         1, _C99 },
 860         { rts_log2l,      1, "log2l",        1, _C99 },
 861         { rts_log10l,     1, "log10l",       1, _C99 },
 862         { rts_powl,       1, "powl",         2, _C99 },
 863         { rts_sinl,       1, "sinl",         1, _C99 },
 864         { rts_cosl,       1, "cosl",         1, _C99 },
 865         { rts_tanl,       1, "tanl",         1, _C99 },
 866         { rts_asinl,      1, "asinl",        1, _C99 },
 867         { rts_acosl,      1, "acosl",        1, _C99 },
 868         { rts_atanl,      1, "atanl",        1, _C99 },
 869         { rts_sinhl,      1, "sinhl",        1, _C99 },
 870         { rts_coshl,      1, "coshl",        1, _C99 },
 871         { rts_tanhl,      1, "tanhl",        1, _C99 },
 872
 873         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 874         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 875         { rts_strcmp,     1, "strcmp",       2, _C89 },
 876         { rts_strncmp,    1, "strncmp",      3, _C89 }
 877 };
 878
 879 static ir_entity* get_function_entity(declaration_t *declaration)
 880 {
 881         if(declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
 882                 return declaration->v.entity;
 883         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
 884
 885         symbol_t *symbol = declaration->symbol;
 886         ident    *id     = new_id_from_str(symbol->string);
 887
 888         ir_type  *global_type    = get_glob_type();
 889         ir_type  *ir_type_method = get_ir_type(declaration->type);
 890         assert(is_Method_type(ir_type_method));
 891
 892         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
 893         ir_entity *const entity = new_d_entity(global_type, id, ir_type_method, dbgi);
 894         set_entity_ld_ident(entity, id);
 895         if(declaration->storage_class == STORAGE_CLASS_STATIC
 896                         || declaration->is_inline) {
 897                 set_entity_visibility(entity, visibility_local);
 898         } else if(declaration->init.statement != NULL) {
 899                 set_entity_visibility(entity, visibility_external_visible);
 900         } else {
 901                 set_entity_visibility(entity, visibility_external_allocated);
 902
 903                 /* We should check for file scope here, but as long as we compile C only
 904                    this is not needed. */
 905                 int    n_params = get_method_n_params(ir_type_method);
 906                 int    n_res    = get_method_n_ress(ir_type_method);
 907                 int    i;
 908
 909                 if (n_params == 0 && n_res == 0 && id == predef_idents[rts_abort]) {
 910                         /* found abort(), store for later */
 911                         //abort_ent = ent;
 912                         //abort_tp  = ftype;
 913                 } else {
 914                         if (! firm_opt.freestanding) {
 915                                 /* check for a known runtime function */
 916                                 for (i = 0; i < rts_max; ++i) {
 917                                         /* ignore those rts functions not necessary needed for current mode */
 918                                         if ((c_mode & rts_data[i].flags) == 0)
 919                                                 continue;
 920                                         if (n_params == rts_data[i].n_params && n_res == rts_data[i].n_res &&
 921                                                 id == predef_idents[rts_data[i].id])
 922                                                 rts_entities[rts_data[i].id] = entity;
 923                                 }
 924                         }
 925                 }
 926         }
 927         set_entity_allocation(entity, allocation_static);
 928
 929         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
 930         declaration->v.entity         = entity;
 931
 932         return entity;
 933 }
 934
 935 static ir_node *const_to_firm(const const_expression_t *cnst)
 936 {
 937         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 938         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 939
 940         char    buf[128];
 941         tarval *tv;
 942         size_t  len;
 943         if(mode_is_float(mode)) {
 944                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 945         } else {
 946                 if(mode_is_signed(mode)) {
 947                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
 948                 } else {
 949                         len = snprintf(buf, sizeof(buf), "%llu",
 950                                        (unsigned long long) cnst->v.int_value);
 951                 }
 952                 tv = new_tarval_from_str(buf, len, mode);
 953         }
 954
 955         return new_d_Const(dbgi, mode, tv);
 956 }
 957
 958 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
 959                                 ir_entity *entity)
 960 {
 961         assert(entity != NULL);
 962         union symconst_symbol sym;
 963         sym.entity_p = entity;
 964         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
 965 }
 966
 967 static ir_node *string_to_firm(const source_position_t *const src_pos,
 968                                const char *const id_prefix,
 969                                const char *const string)
 970 {
 971         ir_type *const global_type = get_glob_type();
 972         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 973                                                     ir_type_const_char);
 974
 975         ident     *const id     = unique_ident(id_prefix);
 976         dbg_info  *const dbgi   = get_dbg_info(src_pos);
 977         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
 978         set_entity_ld_ident(entity, id);
 979         set_entity_variability(entity, variability_constant);
 980         set_entity_allocation(entity, allocation_static);
 981
 982         ir_type *const elem_type = ir_type_const_char;
 983         ir_mode *const mode      = get_type_mode(elem_type);
 984
 985         const size_t slen = strlen(string) + 1;
 986
 987         set_array_lower_bound_int(type, 0, 0);
 988         set_array_upper_bound_int(type, 0, slen);
 989         set_type_size_bytes(type, slen);
 990         set_type_state(type, layout_fixed);
 991
 992         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 993         for(size_t i = 0; i < slen; ++i) {
 994                 tvs[i] = new_tarval_from_long(string[i], mode);
 995         }
 996
 997         set_array_entity_values(entity, tvs, slen);
 998         free(tvs);
 999
1000         return create_symconst(dbgi, mode_P_data, entity);
1001 }
1002
1003 static ir_node *string_literal_to_firm(
1004                 const string_literal_expression_t* literal)
1005 {
1006         return string_to_firm(&literal->expression.source_position, "Lstr",
1007                               literal->value);
1008 }
1009
1010 static ir_node *wide_string_literal_to_firm(
1011         const wide_string_literal_expression_t* const literal)
1012 {
1013         ir_type *const global_type = get_glob_type();
1014         ir_type *const elem_type   = ir_type_wchar_t;
1015         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
1016                                                     elem_type);
1017
1018         ident     *const id     = unique_ident("Lstr");
1019         dbg_info  *const dbgi   = get_dbg_info(&literal->expression.source_position);
1020         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1021         set_entity_ld_ident(entity, id);
1022         set_entity_variability(entity, variability_constant);
1023         set_entity_allocation(entity, allocation_static);
1024
1025         ir_mode *const mode      = get_type_mode(elem_type);
1026
1027         const wchar_rep_t *const string = literal->value.begin;
1028         const size_t             slen   = literal->value.size;
1029
1030         set_array_lower_bound_int(type, 0, 0);
1031         set_array_upper_bound_int(type, 0, slen);
1032         set_type_size_bytes(type, slen);
1033         set_type_state(type, layout_fixed);
1034
1035         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1036         for(size_t i = 0; i < slen; ++i) {
1037                 tvs[i] = new_tarval_from_long(string[i], mode);
1038         }
1039
1040         set_array_entity_values(entity, tvs, slen);
1041         free(tvs);
1042
1043         return create_symconst(dbgi, mode_P_data, entity);
1044 }
1045
1046 static ir_node *deref_address(ir_type *const irtype, ir_node *const addr,
1047                               dbg_info *const dbgi)
1048 {
1049         if(is_compound_type(irtype) || is_Array_type(irtype)) {
1050                 return addr;
1051         }
1052
1053         ir_mode *const mode     = get_type_mode(irtype);
1054         ir_node *const memory   = get_store();
1055         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1056         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1057         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1058         set_store(load_mem);
1059         return load_res;
1060 }
1061
1062 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1063 {
1064         ir_mode *mode = get_irn_mode(node);
1065
1066         if(!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1067                 return node;
1068         if(!mode_is_float(mode))
1069                 return node;
1070
1071         /* check if there is already a Conv */
1072         if (get_irn_op(node) == op_Conv) {
1073                 /* convert it into a strict Conv */
1074                 set_Conv_strict(node, 1);
1075                 return node;
1076         }
1077
1078         /* otherwise create a new one */
1079         return new_d_strictConv(dbgi, node, mode);
1080 }
1081
1082 static ir_node *get_global_var_address(dbg_info *const dbgi,
1083                                        const declaration_t *const decl)
1084 {
1085         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1086
1087         ir_entity *const entity = decl->v.entity;
1088         switch ((storage_class_tag_t)decl->storage_class) {
1089                 case STORAGE_CLASS_THREAD:
1090                 case STORAGE_CLASS_THREAD_EXTERN:
1091                 case STORAGE_CLASS_THREAD_STATIC: {
1092                         ir_node *const no_mem = new_NoMem();
1093                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1094                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1095                 }
1096
1097                 default:
1098                         return create_symconst(dbgi, mode_P_data, entity);
1099         }
1100 }
1101
1102 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1103 {
1104         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
1105         declaration_t *declaration = ref->declaration;
1106         type_t        *type        = skip_typeref(declaration->type);
1107
1108         switch((declaration_kind_t) declaration->declaration_kind) {
1109         case DECLARATION_KIND_UNKNOWN:
1110                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
1111                         break;
1112                 }
1113                 get_ir_type(type);
1114                 /* FALLTHROUGH */
1115
1116         case DECLARATION_KIND_ENUM_ENTRY: {
1117                 ir_mode *const mode = get_ir_mode(type);
1118                 return new_Const(mode, declaration->v.enum_val);
1119         }
1120
1121         case DECLARATION_KIND_LOCAL_VARIABLE: {
1122                 ir_mode *const mode = get_ir_mode(type);
1123                 return get_value(declaration->v.value_number, mode);
1124         }
1125         case DECLARATION_KIND_FUNCTION: {
1126                 ir_mode *const mode = get_ir_mode(type);
1127                 return create_symconst(dbgi, mode, declaration->v.entity);
1128         }
1129         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1130                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1131                 ir_type *const irtype = get_entity_type(declaration->v.entity);
1132                 return deref_address(irtype, addr, dbgi);
1133         }
1134
1135         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1136                 ir_entity *entity = declaration->v.entity;
1137                 ir_node   *frame  = get_irg_frame(current_ir_graph);
1138                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1139                 ir_type   *irtype = get_entity_type(entity);
1140                 return deref_address(irtype, sel, dbgi);
1141         }
1142
1143         case DECLARATION_KIND_COMPOUND_MEMBER:
1144         case DECLARATION_KIND_LABEL_BLOCK:
1145                 panic("not implemented reference type");
1146         }
1147
1148         panic("reference to declaration with unknown type found");
1149 }
1150
1151 static ir_node *reference_addr(const reference_expression_t *ref)
1152 {
1153         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
1154         declaration_t *declaration = ref->declaration;
1155
1156         switch((declaration_kind_t) declaration->declaration_kind) {
1157         case DECLARATION_KIND_UNKNOWN:
1158                 break;
1159         case DECLARATION_KIND_LOCAL_VARIABLE:
1160                 panic("local variable without entity has no address");
1161         case DECLARATION_KIND_FUNCTION: {
1162                 type_t *const  type = skip_typeref(ref->expression.datatype);
1163                 ir_mode *const mode = get_ir_mode(type);
1164                 return create_symconst(dbgi, mode, declaration->v.entity);
1165         }
1166         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1167                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1168                 return addr;
1169         }
1170         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1171                 ir_entity *entity = declaration->v.entity;
1172                 ir_node   *frame  = get_irg_frame(current_ir_graph);
1173                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1174
1175                 return sel;
1176         }
1177
1178         case DECLARATION_KIND_ENUM_ENTRY:
1179                 panic("trying to reference enum entry");
1180
1181         case DECLARATION_KIND_COMPOUND_MEMBER:
1182         case DECLARATION_KIND_LABEL_BLOCK:
1183                 panic("not implemented reference type");
1184         }
1185
1186         panic("reference to declaration with unknown type found");
1187 }
1188
1189 static ir_node *process_builtin_call(const call_expression_t *call)
1190 {
1191         dbg_info *dbgi = get_dbg_info(&call->expression.source_position);
1192
1193         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1194         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1195
1196         type_t *type = skip_typeref(builtin->expression.datatype);
1197         assert(is_type_pointer(type));
1198
1199         type_t   *function_type = skip_typeref(type->pointer.points_to);
1200         symbol_t *symbol        = builtin->symbol;
1201
1202         switch(symbol->ID) {
1203         case T___builtin_alloca: {
1204                 if(call->arguments == NULL || call->arguments->next != NULL) {
1205                         panic("invalid number of parameters on __builtin_alloca");
1206                 }
1207                 expression_t *argument = call->arguments->expression;
1208                 ir_node      *size     = expression_to_firm(argument);
1209
1210                 ir_node *store  = get_store();
1211                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1212                                               stack_alloc);
1213                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1214                 set_store(proj_m);
1215                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1216
1217                 return res;
1218         }
1219         case T___builtin_nan:
1220         case T___builtin_nanf:
1221         case T___builtin_nand: {
1222                 /* Ignore string for now... */
1223                 assert(is_type_function(function_type));
1224                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1225                 tarval  *tv   = get_mode_NAN(mode);
1226                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1227                 return res;
1228         }
1229         case T___builtin_va_end:
1230                 return NULL;
1231         default:
1232                 panic("Unsupported builtin found\n");
1233         }
1234 }
1235
1236 static ir_node *call_expression_to_firm(const call_expression_t *call)
1237 {
1238         assert(get_cur_block() != NULL);
1239
1240         expression_t *function = call->function;
1241         if(function->kind == EXPR_BUILTIN_SYMBOL) {
1242                 return process_builtin_call(call);
1243         }
1244         ir_node *callee = expression_to_firm(function);
1245
1246         type_t *type = skip_typeref(function->base.datatype);
1247         assert(is_type_pointer(type));
1248         pointer_type_t *pointer_type = &type->pointer;
1249         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1250         assert(is_type_function(points_to));
1251         function_type_t *function_type = &points_to->function;
1252
1253         int              n_parameters = 0;
1254         call_argument_t *argument     = call->arguments;
1255         for( ; argument != NULL; argument = argument->next) {
1256                 ++n_parameters;
1257         }
1258
1259         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
1260
1261         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1262         ir_type *new_method_type = NULL;
1263         if(function_type->variadic || function_type->unspecified_parameters) {
1264                 /* we need to construct a new method type matching the call
1265                  * arguments... */
1266                 int n_res       = get_method_n_ress(ir_method_type);
1267                 new_method_type = new_type_method(unique_ident("calltype"),
1268                                                   n_parameters, n_res);
1269                 set_method_calling_convention(new_method_type,
1270                                get_method_calling_convention(ir_method_type));
1271                 set_method_additional_properties(new_method_type,
1272                                get_method_additional_properties(ir_method_type));
1273
1274                 for(int i = 0; i < n_res; ++i) {
1275                         set_method_res_type(new_method_type, i,
1276                                             get_method_res_type(ir_method_type, i));
1277                 }
1278         }
1279         ir_node *in[n_parameters];
1280
1281         argument = call->arguments;
1282         int n = 0;
1283         for( ; argument != NULL; argument = argument->next) {
1284                 expression_t *expression = argument->expression;
1285                 ir_node      *arg_node   = expression_to_firm(expression);
1286
1287                 arg_node = do_strict_conv(dbgi, arg_node);
1288
1289                 in[n] = arg_node;
1290                 if(new_method_type != NULL) {
1291                         ir_type *irtype = get_ir_type(expression->base.datatype);
1292                         set_method_param_type(new_method_type, n, irtype);
1293                 }
1294
1295                 n++;
1296         }
1297         assert(n == n_parameters);
1298
1299         if(new_method_type != NULL)
1300                 ir_method_type = new_method_type;
1301
1302         ir_node  *store = get_store();
1303         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1304                                      ir_method_type);
1305         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1306         set_store(mem);
1307
1308         type_t  *return_type = skip_typeref(function_type->return_type);
1309         ir_node *result      = NULL;
1310
1311         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1312                 ir_mode *mode;
1313                 if(is_type_scalar(return_type)) {
1314                         mode = get_ir_mode(return_type);
1315                 } else {
1316                         mode = mode_P_data;
1317                 }
1318                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1319                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1320         }
1321
1322         return result;
1323 }
1324
1325 static void statement_to_firm(statement_t *statement);
1326 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1327
1328 static ir_node *expression_to_addr(const expression_t *expression);
1329 static void create_condition_evaluation(const expression_t *expression,
1330                                         ir_node *true_block,
1331                                         ir_node *false_block);
1332
1333 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1334                          ir_node *value)
1335 {
1336         value = do_strict_conv(dbgi, value);
1337
1338         ir_node  *memory = get_store();
1339
1340         if(is_type_scalar(type)) {
1341                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1342                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1343                 set_store(store_mem);
1344         } else {
1345                 ir_type *irtype    = get_ir_type(type);
1346                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1347                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1348                 set_store(copyb_mem);
1349         }
1350 }
1351
1352 static void set_value_for_expression(const expression_t *expression,
1353                                      ir_node *value)
1354 {
1355         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1356         value          = do_strict_conv(dbgi, value);
1357
1358         if(expression->kind == EXPR_REFERENCE) {
1359                 const reference_expression_t *ref = &expression->reference;
1360
1361                 declaration_t *declaration = ref->declaration;
1362                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1363                 if(declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1364                         set_value(declaration->v.value_number, value);
1365                         return;
1366                 }
1367         }
1368
1369         ir_node *addr = expression_to_addr(expression);
1370         type_t  *type = skip_typeref(expression->base.datatype);
1371         assign_value(dbgi, addr, type, value);
1372 }
1373
1374 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1375 {
1376         ir_mode *value_mode = get_irn_mode(value);
1377
1378         if (value_mode == dest_mode || is_Bad(value))
1379                 return value;
1380
1381         if(dest_mode == mode_b) {
1382                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1383                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1384                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1385                 return proj;
1386         }
1387
1388         return new_d_Conv(dbgi, value, dest_mode);
1389 }
1390
1391 static ir_node *create_incdec(const unary_expression_t *expression)
1392 {
1393         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
1394         type_t       *type  = skip_typeref(expression->expression.datatype);
1395         ir_mode      *mode  = get_ir_mode(type);
1396         expression_t *value = expression->value;
1397
1398         ir_node *value_node = expression_to_firm(value);
1399
1400         ir_node *offset;
1401         if(is_type_pointer(type)) {
1402                 pointer_type_t *pointer_type = &type->pointer;
1403                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
1404                 offset = new_Const_long(mode_int, elem_size);
1405         } else {
1406                 assert(is_type_arithmetic(type));
1407                 offset = new_Const(mode, get_mode_one(mode));
1408         }
1409
1410         switch(expression->expression.kind) {
1411         case EXPR_UNARY_POSTFIX_INCREMENT: {
1412                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1413                 set_value_for_expression(value, new_value);
1414                 return value_node;
1415         }
1416         case EXPR_UNARY_POSTFIX_DECREMENT: {
1417                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1418                 set_value_for_expression(value, new_value);
1419                 return value_node;
1420         }
1421         case EXPR_UNARY_PREFIX_INCREMENT: {
1422                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1423                 set_value_for_expression(value, new_value);
1424                 return new_value;
1425         }
1426         case EXPR_UNARY_PREFIX_DECREMENT: {
1427                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1428                 set_value_for_expression(value, new_value);
1429                 return new_value;
1430         }
1431         default:
1432                 panic("no incdec expr in create_incdec");
1433                 return NULL;
1434         }
1435 }
1436
1437 static bool is_local_variable(expression_t *expression)
1438 {
1439         if (expression->kind != EXPR_REFERENCE)
1440                 return false;
1441         reference_expression_t *ref_expr    = &expression->reference;
1442         declaration_t          *declaration = ref_expr->declaration;
1443         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1444 }
1445
1446 static pn_Cmp get_pnc(const expression_kind_t kind)
1447 {
1448         switch(kind) {
1449         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1450         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1451         case EXPR_BINARY_NOTEQUAL:      return pn_Cmp_Ne;
1452         case EXPR_BINARY_ISLESS:
1453         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1454         case EXPR_BINARY_ISLESSEQUAL:
1455         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1456         case EXPR_BINARY_ISGREATER:
1457         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1458         case EXPR_BINARY_ISGREATEREQUAL:
1459         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1460         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1461
1462         default:
1463                 break;
1464         }
1465         panic("trying to get pn_Cmp from non-comparison binexpr type");
1466 }
1467
1468 /**
1469  * Handle the assume optimizer hint: check if a Confirm
1470  * node can be created.
1471  *
1472  * @param dbi    debug info
1473  * @param expr   the IL assume expression
1474  *
1475  * we support here only some simple cases:
1476  *  - var rel const
1477  *  - const rel val
1478  *  - var rel var
1479  */
1480 static ir_node *handle_assume_compare(dbg_info *dbi,
1481                                       const binary_expression_t *expression)
1482 {
1483         expression_t  *op1 = expression->left;
1484         expression_t  *op2 = expression->right;
1485         declaration_t *var2, *var = NULL;
1486         ir_node       *res = NULL;
1487         pn_Cmp         cmp_val;
1488
1489         cmp_val = get_pnc(expression->expression.kind);
1490
1491         if (is_local_variable(op1) && is_local_variable(op2)) {
1492         var  = op1->reference.declaration;
1493             var2 = op2->reference.declaration;
1494
1495                 type_t  *const type = skip_typeref(var->type);
1496                 ir_mode *const mode = get_ir_mode(type);
1497
1498                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1499                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1500
1501                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1502                 set_value(var2->v.value_number, res);
1503
1504                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1505                 set_value(var->v.value_number, res);
1506
1507                 return res;
1508         }
1509
1510         expression_t *con;
1511         if (is_local_variable(op1) && is_constant_expression(op2)) {
1512                 var = op1->reference.declaration;
1513                 con = op2;
1514         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
1515                 cmp_val = get_inversed_pnc(cmp_val);
1516                 var = op2->reference.declaration;
1517                 con = op1;
1518         }
1519
1520         if (var != NULL) {
1521                 type_t  *const type = skip_typeref(var->type);
1522                 ir_mode *const mode = get_ir_mode(type);
1523
1524                 res = get_value(var->v.value_number, mode);
1525                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
1526                 set_value(var->v.value_number, res);
1527         }
1528         return res;
1529 }
1530
1531 /**
1532  * Handle the assume optimizer hint.
1533  *
1534  * @param dbi    debug info
1535  * @param expr   the IL assume expression
1536  */
1537 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
1538         switch(expression->kind) {
1539         case EXPR_BINARY_EQUAL:
1540         case EXPR_BINARY_NOTEQUAL:
1541         case EXPR_BINARY_LESS:
1542         case EXPR_BINARY_LESSEQUAL:
1543         case EXPR_BINARY_GREATER:
1544         case EXPR_BINARY_GREATEREQUAL:
1545                 return handle_assume_compare(dbi, &expression->binary);
1546         default:
1547                 return NULL;
1548         }
1549 }
1550
1551 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1552 {
1553         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1554         type_t   *type = skip_typeref(expression->expression.datatype);
1555
1556         if(expression->expression.kind == EXPR_UNARY_TAKE_ADDRESS)
1557                 return expression_to_addr(expression->value);
1558
1559         const expression_t *value = expression->value;
1560
1561         switch(expression->expression.kind) {
1562         case EXPR_UNARY_NEGATE: {
1563                 ir_node *value_node = expression_to_firm(value);
1564                 ir_mode *mode = get_ir_mode(type);
1565                 return new_d_Minus(dbgi, value_node, mode);
1566         }
1567         case EXPR_UNARY_PLUS:
1568                 return expression_to_firm(value);
1569         case EXPR_UNARY_BITWISE_NEGATE: {
1570                 ir_node *value_node = expression_to_firm(value);
1571                 ir_mode *mode = get_ir_mode(type);
1572                 return new_d_Not(dbgi, value_node, mode);
1573         }
1574         case EXPR_UNARY_NOT: {
1575                 ir_node *value_node = expression_to_firm(value);
1576                 ir_mode *mode = get_ir_mode(type);
1577                 if(get_irn_mode(value_node) != mode_b) {
1578                         value_node = create_conv(dbgi, value_node, mode_b);
1579                 }
1580                 value_node = new_d_Not(dbgi, value_node, mode_b);
1581                 if(mode != mode_b) {
1582                         value_node = create_conv(dbgi, value_node, mode);
1583                 }
1584                 return value_node;
1585         }
1586         case EXPR_UNARY_DEREFERENCE: {
1587                 ir_node *value_node = expression_to_firm(value);
1588                 type_t  *value_type = skip_typeref(value->base.datatype);
1589                 ir_type *irtype     = get_ir_type(value_type);
1590                 assert(is_Pointer_type(irtype));
1591                 ir_type *points_to  = get_pointer_points_to_type(irtype);
1592                 return deref_address(points_to, value_node, dbgi);
1593         }
1594         case EXPR_UNARY_POSTFIX_INCREMENT:
1595         case EXPR_UNARY_POSTFIX_DECREMENT:
1596         case EXPR_UNARY_PREFIX_INCREMENT:
1597         case EXPR_UNARY_PREFIX_DECREMENT:
1598                 return create_incdec(expression);
1599         case EXPR_UNARY_CAST: {
1600                 ir_node *value_node = expression_to_firm(value);
1601                 ir_mode *mode = get_ir_mode(type);
1602                 ir_node *node = create_conv(dbgi, value_node, mode);
1603                 node = do_strict_conv(dbgi, node);
1604                 return node;
1605         }
1606         case EXPR_UNARY_CAST_IMPLICIT: {
1607                 ir_node *value_node = expression_to_firm(value);
1608                 ir_mode *mode = get_ir_mode(type);
1609                 return create_conv(dbgi, value_node, mode);
1610         }
1611         case EXPR_UNARY_ASSUME:
1612                 if(firm_opt.confirm)
1613                         return handle_assume(dbgi, value);
1614                 else
1615                         return NULL;
1616
1617         default:
1618                 break;
1619         }
1620         panic("invalid UNEXPR type found");
1621 }
1622
1623 static ir_node *create_lazy_op(const binary_expression_t *expression)
1624 {
1625         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1626         type_t   *type = expression->expression.datatype;
1627         ir_mode  *mode = get_ir_mode(type);
1628
1629         if(is_constant_expression(expression->left)) {
1630                 long val = fold_constant(expression->left);
1631                 expression_kind_t ekind = expression->expression.kind;
1632                 if((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
1633                                 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
1634                         return expression_to_firm(expression->right);
1635                 } else {
1636                         assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
1637                                         || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
1638                         return new_Const(mode, get_mode_one(mode));
1639                 }
1640         }
1641
1642         ir_node *cur_block = get_cur_block();
1643
1644         ir_node *one_block = new_immBlock();
1645         ir_node *one       = new_Const(mode, get_mode_one(mode));
1646         ir_node *jmp_one   = new_d_Jmp(dbgi);
1647
1648         ir_node *zero_block = new_immBlock();
1649         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1650         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1651
1652         set_cur_block(cur_block);
1653         create_condition_evaluation((const expression_t*) expression,
1654                                     one_block, zero_block);
1655         mature_immBlock(one_block);
1656         mature_immBlock(zero_block);
1657
1658         ir_node *common_block = new_immBlock();
1659         add_immBlock_pred(common_block, jmp_one);
1660         add_immBlock_pred(common_block, jmp_zero);
1661         mature_immBlock(common_block);
1662
1663         ir_node *in[2] = { one, zero };
1664         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1665
1666         return val;
1667 }
1668
1669 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1670                                             ir_node *right, ir_mode *mode);
1671
1672 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1673                                         create_arithmetic_func func)
1674 {
1675         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1676         ir_node  *left  = expression_to_firm(expression->left);
1677         ir_node  *right = expression_to_firm(expression->right);
1678         type_t   *type  = expression->right->base.datatype;
1679         /* be careful with the modes, because in arithmetic assign nodes only
1680          * the right operand has the mode of the arithmetic already */
1681         ir_mode  *mode  = get_ir_mode(type);
1682         left            = create_conv(dbgi, left, mode);
1683         ir_node  *res   = func(dbgi, left, right, mode);
1684
1685         return res;
1686 }
1687
1688 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1689                                    ir_node  *      integer,
1690                                    type_t   *const type,
1691                                    dbg_info *const dbgi,
1692                                    const create_arithmetic_func func)
1693 {
1694         pointer_type_t *const pointer_type = &type->pointer;
1695         type_t         *const points_to    = pointer_type->points_to;
1696         const unsigned        elem_size    = get_type_size(points_to);
1697
1698         assert(elem_size >= 1);
1699         if (elem_size > 1) {
1700                 integer             = create_conv(dbgi, integer, mode_int);
1701                 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
1702                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_int);
1703                 integer = mul;
1704         }
1705
1706         ir_mode *const mode = get_ir_mode(type);
1707         return func(dbgi, pointer, integer, mode);
1708 }
1709
1710 static ir_node *create_arithmetic_assign_binop(
1711                 const binary_expression_t *expression, create_arithmetic_func func)
1712 {
1713         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1714         type_t   *const type = skip_typeref(expression->expression.datatype);
1715         ir_node  *value;
1716
1717         if (is_type_pointer(type)) {
1718                 ir_node *const pointer = expression_to_firm(expression->left);
1719                 ir_node *      integer = expression_to_firm(expression->right);
1720                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1721         } else {
1722                 value = create_arithmetic_binop(expression, func);
1723         }
1724
1725         ir_mode *const mode = get_ir_mode(type);
1726         value = create_conv(dbgi, value, mode);
1727         set_value_for_expression(expression->left, value);
1728
1729         return value;
1730 }
1731
1732 static ir_node *create_add(const binary_expression_t *expression)
1733 {
1734         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1735         ir_node  *left  = expression_to_firm(expression->left);
1736         ir_node  *right = expression_to_firm(expression->right);
1737         type_t   *type  = expression->expression.datatype;
1738
1739         expression_t *expr_left  = expression->left;
1740         expression_t *expr_right = expression->right;
1741         type_t       *type_left  = skip_typeref(expr_left->base.datatype);
1742         type_t       *type_right = skip_typeref(expr_right->base.datatype);
1743
1744         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1745                 ir_mode *const mode = get_ir_mode(type);
1746                 return new_d_Add(dbgi, left, right, mode);
1747         }
1748
1749         if (is_type_pointer(type_left)) {
1750                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1751         } else {
1752                 assert(is_type_pointer(type_right));
1753                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1754         }
1755 }
1756
1757 static ir_node *create_sub(const binary_expression_t *expression)
1758 {
1759         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1760         expression_t *const expr_left  = expression->left;
1761         expression_t *const expr_right = expression->right;
1762         ir_node      *const left       = expression_to_firm(expr_left);
1763         ir_node      *const right      = expression_to_firm(expr_right);
1764         type_t       *const type       = expression->expression.datatype;
1765         type_t       *const type_left  = skip_typeref(expr_left->base.datatype);
1766         type_t       *const type_right = skip_typeref(expr_right->base.datatype);
1767
1768         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1769                 ir_mode *const mode = get_ir_mode(type);
1770                 return new_d_Sub(dbgi, left, right, mode);
1771         } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
1772                 const pointer_type_t *const ptr_type = &type_left->pointer;
1773                 const unsigned elem_size             = get_type_size(ptr_type->points_to);
1774                 ir_mode *const mode   = get_ir_mode(type);
1775                 ir_node *const sub    = new_d_Sub(dbgi, left, right, mode);
1776                 ir_node *const cnst   = new_Const_long(mode_int, (long)elem_size);
1777                 ir_node *const no_mem = new_NoMem();
1778                 ir_node *const div    = new_d_Div(dbgi, no_mem, sub, cnst, mode,
1779                                                   op_pin_state_floats);
1780                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
1781         }
1782
1783         assert(is_type_pointer(type_left));
1784         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1785 }
1786
1787 static ir_node *create_shift(const binary_expression_t *expression)
1788 {
1789         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1790         ir_node  *left  = expression_to_firm(expression->left);
1791         ir_node  *right = expression_to_firm(expression->right);
1792         type_t   *type  = expression->expression.datatype;
1793         ir_mode  *mode  = get_ir_mode(type);
1794
1795         /* firm always wants the shift count to be unsigned */
1796         right = create_conv(dbgi, right, mode_uint);
1797
1798         ir_node *res;
1799
1800         switch(expression->expression.kind) {
1801         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1802         case EXPR_BINARY_SHIFTLEFT:
1803                 res = new_d_Shl(dbgi, left, right, mode);
1804                 break;
1805         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1806         case EXPR_BINARY_SHIFTRIGHT: {
1807                  expression_t *expr_left = expression->left;
1808                  type_t       *type_left = skip_typeref(expr_left->base.datatype);
1809
1810                  if(is_type_signed(type_left)) {
1811                         res = new_d_Shrs(dbgi, left, right, mode);
1812                  } else {
1813                          res = new_d_Shr(dbgi, left, right, mode);
1814                  }
1815                  break;
1816         }
1817         default:
1818                 panic("create shift op called for non-shift op");
1819         }
1820
1821         return res;
1822 }
1823
1824
1825 static ir_node *create_divmod(const binary_expression_t *expression)
1826 {
1827         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1828         ir_node  *left  = expression_to_firm(expression->left);
1829         ir_node  *right = expression_to_firm(expression->right);
1830         ir_node  *pin   = new_Pin(new_NoMem());
1831         /* be careful with the modes, because in arithmetic assign nodes only
1832          * the right operand has the mode of the arithmetic already */
1833         type_t   *type  = expression->right->base.datatype;
1834         ir_mode  *mode  = get_ir_mode(type);
1835         left            = create_conv(dbgi, left, mode);
1836         ir_node  *op;
1837         ir_node  *res;
1838
1839         switch (expression->expression.kind) {
1840         case EXPR_BINARY_DIV:
1841         case EXPR_BINARY_DIV_ASSIGN:
1842                 if(mode_is_float(mode)) {
1843                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1844                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1845                 } else {
1846                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1847                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1848                 }
1849                 break;
1850
1851         case EXPR_BINARY_MOD:
1852         case EXPR_BINARY_MOD_ASSIGN:
1853                 assert(!mode_is_float(mode));
1854                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1855                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1856                 break;
1857
1858         default: panic("unexpected binary expression type in create_divmod()");
1859         }
1860
1861         return res;
1862 }
1863
1864 static ir_node *create_arithmetic_assign_divmod(
1865                 const binary_expression_t *expression)
1866 {
1867         ir_node  *      value = create_divmod(expression);
1868         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1869         type_t   *const type  = expression->expression.datatype;
1870         ir_mode  *const mode  = get_ir_mode(type);
1871
1872         assert(type->kind != TYPE_POINTER);
1873
1874         value = create_conv(dbgi, value, mode);
1875         set_value_for_expression(expression->left, value);
1876
1877         return value;
1878 }
1879
1880 static ir_node *create_arithmetic_assign_shift(
1881                 const binary_expression_t *expression)
1882 {
1883         ir_node  *      value = create_shift(expression);
1884         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1885         type_t   *const type  = expression->expression.datatype;
1886         ir_mode  *const mode  = get_ir_mode(type);
1887
1888         value = create_conv(dbgi, value, mode);
1889         set_value_for_expression(expression->left, value);
1890
1891         return value;
1892 }
1893
1894 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1895 {
1896         expression_kind_t kind = expression->expression.kind;
1897
1898         switch(kind) {
1899         case EXPR_BINARY_EQUAL:
1900         case EXPR_BINARY_NOTEQUAL:
1901         case EXPR_BINARY_LESS:
1902         case EXPR_BINARY_LESSEQUAL:
1903         case EXPR_BINARY_GREATER:
1904         case EXPR_BINARY_GREATEREQUAL:
1905         case EXPR_BINARY_ISGREATER:
1906         case EXPR_BINARY_ISGREATEREQUAL:
1907         case EXPR_BINARY_ISLESS:
1908         case EXPR_BINARY_ISLESSEQUAL:
1909         case EXPR_BINARY_ISLESSGREATER:
1910         case EXPR_BINARY_ISUNORDERED: {
1911                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1912                 ir_node *left  = expression_to_firm(expression->left);
1913                 ir_node *right = expression_to_firm(expression->right);
1914                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1915                 long     pnc   = get_pnc(kind);
1916                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1917                 return proj;
1918         }
1919         case EXPR_BINARY_ASSIGN: {
1920                 ir_node *right = expression_to_firm(expression->right);
1921                 set_value_for_expression(expression->left, right);
1922
1923                 return right;
1924         }
1925         case EXPR_BINARY_ADD:
1926                 return create_add(expression);
1927         case EXPR_BINARY_SUB:
1928                 return create_sub(expression);
1929         case EXPR_BINARY_MUL:
1930                 return create_arithmetic_binop(expression, new_d_Mul);
1931         case EXPR_BINARY_BITWISE_AND:
1932                 return create_arithmetic_binop(expression, new_d_And);
1933         case EXPR_BINARY_BITWISE_OR:
1934                 return create_arithmetic_binop(expression, new_d_Or);
1935         case EXPR_BINARY_BITWISE_XOR:
1936                 return create_arithmetic_binop(expression, new_d_Eor);
1937         case EXPR_BINARY_SHIFTLEFT:
1938         case EXPR_BINARY_SHIFTRIGHT:
1939                 return create_shift(expression);
1940         case EXPR_BINARY_DIV:
1941         case EXPR_BINARY_MOD:
1942                 return create_divmod(expression);
1943         case EXPR_BINARY_LOGICAL_AND:
1944         case EXPR_BINARY_LOGICAL_OR:
1945                 return create_lazy_op(expression);
1946         case EXPR_BINARY_COMMA:
1947                 expression_to_firm(expression->left);
1948                 return expression_to_firm(expression->right);
1949         case EXPR_BINARY_ADD_ASSIGN:
1950                 return create_arithmetic_assign_binop(expression, new_d_Add);
1951         case EXPR_BINARY_SUB_ASSIGN:
1952                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1953         case EXPR_BINARY_MUL_ASSIGN:
1954                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1955         case EXPR_BINARY_DIV_ASSIGN:
1956                 return create_arithmetic_assign_divmod(expression);
1957         case EXPR_BINARY_BITWISE_AND_ASSIGN:
1958                 return create_arithmetic_assign_binop(expression, new_d_And);
1959         case EXPR_BINARY_BITWISE_OR_ASSIGN:
1960                 return create_arithmetic_assign_binop(expression, new_d_Or);
1961         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
1962                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1963         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1964         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1965                 return create_arithmetic_assign_shift(expression);
1966         case EXPR_BINARY_BUILTIN_EXPECT:
1967                 return expression_to_firm(expression->left);
1968         default:
1969                 panic("TODO binexpr type");
1970         }
1971 }
1972
1973 static ir_node *array_access_addr(const array_access_expression_t *expression)
1974 {
1975         dbg_info *dbgi      = get_dbg_info(&expression->expression.source_position);
1976         ir_node  *base_addr = expression_to_firm(expression->array_ref);
1977         ir_node  *offset    = expression_to_firm(expression->index);
1978         offset              = create_conv(dbgi, offset, mode_uint);
1979
1980         type_t *ref_type = skip_typeref(expression->array_ref->base.datatype);
1981         assert(is_type_pointer(ref_type));
1982         pointer_type_t *pointer_type = &ref_type->pointer;
1983
1984         unsigned elem_size       = get_type_size(pointer_type->points_to);
1985         ir_node *elem_size_const = new_Const_long(mode_uint, elem_size);
1986         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1987                                              mode_uint);
1988         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
1989
1990         return result;
1991 }
1992
1993 static ir_node *array_access_to_firm(
1994                 const array_access_expression_t *expression)
1995 {
1996         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1997         ir_node  *addr   = array_access_addr(expression);
1998         type_t   *type   = revert_automatic_type_conversion(
1999                         (const expression_t*) expression);
2000         type             = skip_typeref(type);
2001         ir_type  *irtype = get_ir_type(type);
2002
2003         return deref_address(irtype, addr, dbgi);
2004 }
2005
2006 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
2007 {
2008         type_t *type = expression->type;
2009         if(type == NULL) {
2010                 type = expression->size_expression->base.datatype;
2011                 assert(type != NULL);
2012         }
2013
2014         ir_mode *const mode = get_ir_mode(expression->expression.datatype);
2015         symconst_symbol sym;
2016         sym.type_p = get_ir_type(type);
2017         return new_SymConst(mode, sym, symconst_type_size);
2018 }
2019
2020 static ir_node *alignof_to_firm(const alignof_expression_t *expression)
2021 {
2022         type_t *const  type = expression->type;
2023         ir_mode *const mode = get_ir_mode(expression->expression.datatype);
2024         symconst_symbol sym;
2025         sym.type_p = get_ir_type(type);
2026         return new_SymConst(mode, sym, symconst_type_align);
2027 }
2028
2029 static long fold_constant(const expression_t *expression)
2030 {
2031         assert(is_constant_expression(expression));
2032
2033         ir_graph *old_current_ir_graph = current_ir_graph;
2034         if(current_ir_graph == NULL) {
2035                 current_ir_graph = get_const_code_irg();
2036         }
2037
2038         ir_node *cnst = expression_to_firm(expression);
2039         current_ir_graph = old_current_ir_graph;
2040
2041         if(!is_Const(cnst)) {
2042                 panic("couldn't fold constant\n");
2043         }
2044
2045         tarval *tv = get_Const_tarval(cnst);
2046         if(!tarval_is_long(tv)) {
2047                 panic("result of constant folding is not integer\n");
2048         }
2049
2050         return get_tarval_long(tv);
2051 }
2052
2053 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2054 {
2055         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
2056
2057         /* first try to fold a constant condition */
2058         if(is_constant_expression(expression->condition)) {
2059                 long val = fold_constant(expression->condition);
2060                 if(val) {
2061                         return expression_to_firm(expression->true_expression);
2062                 } else {
2063                         return expression_to_firm(expression->false_expression);
2064                 }
2065         }
2066
2067         ir_node *cur_block   = get_cur_block();
2068
2069         /* create the true block */
2070         ir_node *true_block  = new_immBlock();
2071
2072         ir_node *true_val = expression_to_firm(expression->true_expression);
2073         ir_node *true_jmp = new_Jmp();
2074
2075         /* create the false block */
2076         ir_node *false_block = new_immBlock();
2077
2078         ir_node *false_val = expression_to_firm(expression->false_expression);
2079         ir_node *false_jmp = new_Jmp();
2080
2081         /* create the condition evaluation */
2082         set_cur_block(cur_block);
2083         create_condition_evaluation(expression->condition, true_block, false_block);
2084         mature_immBlock(true_block);
2085         mature_immBlock(false_block);
2086
2087         /* create the common block */
2088         ir_node *common_block = new_immBlock();
2089         add_immBlock_pred(common_block, true_jmp);
2090         add_immBlock_pred(common_block, false_jmp);
2091         mature_immBlock(common_block);
2092
2093         /* TODO improve static semantics, so either both or no values are NULL */
2094         if (true_val == NULL || false_val == NULL)
2095                 return NULL;
2096
2097         ir_node *in[2] = { true_val, false_val };
2098         ir_mode *mode  = get_irn_mode(true_val);
2099         assert(get_irn_mode(false_val) == mode);
2100         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2101
2102         return val;
2103 }
2104
2105 static ir_node *select_addr(const select_expression_t *expression)
2106 {
2107         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
2108
2109         ir_node *compound_addr = expression_to_firm(expression->compound);
2110
2111         declaration_t *entry = expression->compound_entry;
2112         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2113         ir_entity     *entity = entry->v.entity;
2114
2115         assert(entity != NULL);
2116
2117         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2118
2119         return sel;
2120 }
2121
2122 static ir_node *select_to_firm(const select_expression_t *expression)
2123 {
2124         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
2125         ir_node  *addr   = select_addr(expression);
2126         type_t   *type   = revert_automatic_type_conversion(
2127                         (const expression_t*) expression);
2128         type             = skip_typeref(type);
2129         ir_type  *irtype = get_ir_type(type);
2130
2131         return deref_address(irtype, addr, dbgi);
2132 }
2133
2134 /* Values returned by __builtin_classify_type. */
2135 typedef enum gcc_type_class
2136 {
2137         no_type_class = -1,
2138         void_type_class,
2139         integer_type_class,
2140         char_type_class,
2141         enumeral_type_class,
2142         boolean_type_class,
2143         pointer_type_class,
2144         reference_type_class,
2145         offset_type_class,
2146         real_type_class,
2147         complex_type_class,
2148         function_type_class,
2149         method_type_class,
2150         record_type_class,
2151         union_type_class,
2152         array_type_class,
2153         string_type_class,
2154         set_type_class,
2155         file_type_class,
2156         lang_type_class
2157 } gcc_type_class;
2158
2159 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2160 {
2161         const type_t *const type = expr->type_expression->base.datatype;
2162
2163         gcc_type_class tc;
2164         switch (type->kind)
2165         {
2166                 case TYPE_ATOMIC: {
2167                         const atomic_type_t *const atomic_type = &type->atomic;
2168                         switch (atomic_type->atype) {
2169                                 /* should not be reached */
2170                                 case ATOMIC_TYPE_INVALID:
2171                                         tc = no_type_class;
2172                                         break;
2173
2174                                 /* gcc cannot do that */
2175                                 case ATOMIC_TYPE_VOID:
2176                                         tc = void_type_class;
2177                                         break;
2178
2179                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2180                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2181                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2182                                 case ATOMIC_TYPE_SHORT:
2183                                 case ATOMIC_TYPE_USHORT:
2184                                 case ATOMIC_TYPE_INT:
2185                                 case ATOMIC_TYPE_UINT:
2186                                 case ATOMIC_TYPE_LONG:
2187                                 case ATOMIC_TYPE_ULONG:
2188                                 case ATOMIC_TYPE_LONGLONG:
2189                                 case ATOMIC_TYPE_ULONGLONG:
2190                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2191                                         tc = integer_type_class;
2192                                         break;
2193
2194                                 case ATOMIC_TYPE_FLOAT:
2195                                 case ATOMIC_TYPE_DOUBLE:
2196                                 case ATOMIC_TYPE_LONG_DOUBLE:
2197                                         tc = real_type_class;
2198                                         break;
2199
2200 #ifdef PROVIDE_COMPLEX
2201                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
2202                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
2203                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
2204                                         tc = complex_type_class;
2205                                         break;
2206                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
2207                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
2208                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
2209                                         tc = complex_type_class;
2210                                         break;
2211 #endif
2212
2213                                 default:
2214                                         panic("Unimplemented case in classify_type_to_firm().");
2215                         }
2216                         break;
2217                 }
2218
2219                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2220                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2221                 case TYPE_POINTER:         tc = pointer_type_class; break;
2222                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
2223                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
2224
2225                 /* gcc handles this as integer */
2226                 case TYPE_ENUM:            tc = integer_type_class; break;
2227
2228                 default:
2229                         panic("Unimplemented case in classify_type_to_firm().");
2230         }
2231
2232         dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
2233         ir_mode  *const mode = mode_int;
2234         tarval   *const tv   = new_tarval_from_long(tc, mode);
2235         return new_d_Const(dbgi, mode, tv);
2236 }
2237
2238 static ir_node *function_name_to_firm(
2239                 const string_literal_expression_t *const expr)
2240 {
2241         if (current_function_name == NULL) {
2242                 const source_position_t *const src_pos =
2243                         &expr->expression.source_position;
2244                 const char *const name = current_function_decl->symbol->string;
2245                 current_function_name = string_to_firm(src_pos, "__func__", name);
2246         }
2247
2248         return current_function_name;
2249 }
2250
2251 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2252 {
2253         statement_t *statement = expr->statement;
2254
2255         assert(statement->kind == STATEMENT_COMPOUND);
2256         return compound_statement_to_firm(&statement->compound);
2257 }
2258
2259 static ir_node *va_start_expression_to_firm(
2260         const va_start_expression_t *const expr)
2261 {
2262         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2263         int        const n           = get_method_n_params(method_type) - 1;
2264         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2265         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2266         dbg_info  *const dbgi        =
2267                 get_dbg_info(&expr->expression.source_position);
2268         ir_node   *const no_mem      = new_NoMem();
2269         ir_node   *const arg_sel     =
2270                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2271
2272         size_t     const parm_size   = get_type_size(expr->parameter->type);
2273         ir_node   *const cnst        = new_Const_long(mode_uint, parm_size);
2274         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2275         set_value_for_expression(expr->ap, add);
2276
2277         return NULL;
2278 }
2279
2280 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2281 {
2282         ir_type  *const irtype = get_ir_type(expr->expression.datatype);
2283         ir_node  *const ap     = expression_to_firm(expr->ap);
2284         dbg_info *const dbgi   = get_dbg_info(&expr->expression.source_position);
2285         ir_node  *const res    = deref_address(irtype, ap, dbgi);
2286
2287         size_t    const parm_size = get_type_size(expr->expression.datatype);
2288         ir_node  *const cnst      = new_Const_long(mode_uint, parm_size);
2289         ir_node  *const add       = new_d_Add(dbgi, ap, cnst, mode_P_data);
2290         set_value_for_expression(expr->ap, add);
2291
2292         return res;
2293 }
2294
2295 static ir_node *dereference_addr(const unary_expression_t *const expression)
2296 {
2297         assert(expression->expression.kind == EXPR_UNARY_DEREFERENCE);
2298         return expression_to_firm(expression->value);
2299 }
2300
2301 static ir_node *expression_to_addr(const expression_t *expression)
2302 {
2303         switch(expression->kind) {
2304         case EXPR_REFERENCE:
2305                 return reference_addr(&expression->reference);
2306         case EXPR_ARRAY_ACCESS:
2307                 return array_access_addr(&expression->array_access);
2308         case EXPR_SELECT:
2309                 return select_addr(&expression->select);
2310         case EXPR_CALL:
2311                 return call_expression_to_firm(&expression->call);
2312         case EXPR_UNARY_DEREFERENCE: {
2313                 return dereference_addr(&expression->unary);
2314         }
2315         default:
2316                 break;
2317         }
2318         panic("trying to get address of non-lvalue");
2319 }
2320
2321 static ir_node *builtin_constant_to_firm(const builtin_constant_expression_t *expression)
2322 {
2323         ir_mode *mode = get_ir_mode(expression->expression.datatype);
2324         long     v;
2325
2326         if (is_constant_expression(expression->value)) {
2327                 v = 1;
2328         } else {
2329                 v = 0;
2330         }
2331         return new_Const_long(mode, v);
2332 }
2333
2334 static ir_node *builtin_prefetch_to_firm(const builtin_prefetch_expression_t *expression)
2335 {
2336         ir_node *adr = expression_to_firm(expression->adr);
2337         /* no Firm support for prefetch yet */
2338         (void) adr;
2339         return NULL;
2340 }
2341
2342 static ir_node *_expression_to_firm(const expression_t *expression)
2343 {
2344         switch(expression->kind) {
2345         case EXPR_CONST:
2346                 return const_to_firm(&expression->conste);
2347         case EXPR_STRING_LITERAL:
2348                 return string_literal_to_firm(&expression->string);
2349         case EXPR_WIDE_STRING_LITERAL:
2350                 return wide_string_literal_to_firm(&expression->wide_string);
2351         case EXPR_REFERENCE:
2352                 return reference_expression_to_firm(&expression->reference);
2353         case EXPR_CALL:
2354                 return call_expression_to_firm(&expression->call);
2355         EXPR_UNARY_CASES
2356                 return unary_expression_to_firm(&expression->unary);
2357         EXPR_BINARY_CASES
2358                 return binary_expression_to_firm(&expression->binary);
2359         case EXPR_ARRAY_ACCESS:
2360                 return array_access_to_firm(&expression->array_access);
2361         case EXPR_SIZEOF:
2362                 return sizeof_to_firm(&expression->sizeofe);
2363         case EXPR_ALIGNOF:
2364                 return alignof_to_firm(&expression->alignofe);
2365         case EXPR_CONDITIONAL:
2366                 return conditional_to_firm(&expression->conditional);
2367         case EXPR_SELECT:
2368                 return select_to_firm(&expression->select);
2369         case EXPR_CLASSIFY_TYPE:
2370                 return classify_type_to_firm(&expression->classify_type);
2371         case EXPR_FUNCTION:
2372         case EXPR_PRETTY_FUNCTION:
2373                 return function_name_to_firm(&expression->string);
2374         case EXPR_STATEMENT:
2375                 return statement_expression_to_firm(&expression->statement);
2376         case EXPR_VA_START:
2377                 return va_start_expression_to_firm(&expression->va_starte);
2378         case EXPR_VA_ARG:
2379                 return va_arg_expression_to_firm(&expression->va_arge);
2380         case EXPR_OFFSETOF:
2381         case EXPR_BUILTIN_SYMBOL:
2382                 panic("unimplemented expression found");
2383         case EXPR_BUILTIN_CONSTANT_P:
2384                 return builtin_constant_to_firm(&expression->builtin_constant);
2385         case EXPR_BUILTIN_PREFETCH:
2386                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2387
2388         case EXPR_UNKNOWN:
2389         case EXPR_INVALID:
2390                 break;
2391         }
2392         panic("invalid expression found");
2393 }
2394
2395 static ir_node *expression_to_firm(const expression_t *expression)
2396 {
2397         ir_node *res = _expression_to_firm(expression);
2398
2399         if(res != NULL && get_irn_mode(res) == mode_b) {
2400                 ir_mode *mode = get_ir_mode(expression->base.datatype);
2401                 res           = create_conv(NULL, res, mode);
2402         }
2403
2404         return res;
2405 }
2406
2407 static ir_node *expression_to_modeb(const expression_t *expression)
2408 {
2409         ir_node *res = _expression_to_firm(expression);
2410         res          = create_conv(NULL, res, mode_b);
2411
2412         return res;
2413 }
2414
2415 /**
2416  * create a short-circuit expression evaluation that tries to construct
2417  * efficient control flow structures for &&, || and ! expressions
2418  */
2419 static void create_condition_evaluation(const expression_t *expression,
2420                                         ir_node *true_block,
2421                                         ir_node *false_block)
2422 {
2423         switch(expression->kind) {
2424         case EXPR_UNARY_NOT: {
2425                 const unary_expression_t *unary_expression = &expression->unary;
2426                 create_condition_evaluation(unary_expression->value, false_block,
2427                                             true_block);
2428                 return;
2429         }
2430         case EXPR_BINARY_LOGICAL_AND: {
2431                 const binary_expression_t *binary_expression = &expression->binary;
2432
2433                 ir_node *cur_block   = get_cur_block();
2434                 ir_node *extra_block = new_immBlock();
2435                 set_cur_block(cur_block);
2436                 create_condition_evaluation(binary_expression->left, extra_block,
2437                                             false_block);
2438                 mature_immBlock(extra_block);
2439                 set_cur_block(extra_block);
2440                 create_condition_evaluation(binary_expression->right, true_block,
2441                                             false_block);
2442                 return;
2443         }
2444         case EXPR_BINARY_LOGICAL_OR: {
2445                 const binary_expression_t *binary_expression = &expression->binary;
2446
2447                 ir_node *cur_block   = get_cur_block();
2448                 ir_node *extra_block = new_immBlock();
2449                 set_cur_block(cur_block);
2450                 create_condition_evaluation(binary_expression->left, true_block,
2451                                             extra_block);
2452                 mature_immBlock(extra_block);
2453                 set_cur_block(extra_block);
2454                 create_condition_evaluation(binary_expression->right, true_block,
2455                                             false_block);
2456                 return;
2457         }
2458         default:
2459                 break;
2460         }
2461
2462         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
2463         ir_node  *condition  = expression_to_modeb(expression);
2464         ir_node  *cond       = new_d_Cond(dbgi, condition);
2465         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2466         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2467
2468         /* set branch prediction info based on __builtin_expect */
2469         if(expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
2470                 long               cnst = fold_constant(expression->binary.right);
2471                 cond_jmp_predicate pred;
2472
2473                 if(cnst == 0) {
2474                         pred = COND_JMP_PRED_FALSE;
2475                 } else {
2476                         pred = COND_JMP_PRED_TRUE;
2477                 }
2478                 set_Cond_jmp_pred(cond, pred);
2479         }
2480
2481         add_immBlock_pred(true_block, true_proj);
2482         add_immBlock_pred(false_block, false_proj);
2483
2484         set_cur_block(NULL);
2485 }
2486
2487
2488
2489 static void create_declaration_entity(declaration_t *declaration,
2490                                       declaration_kind_t declaration_kind,
2491                                       ir_type *parent_type)
2492 {
2493         ident     *const id     = new_id_from_str(declaration->symbol->string);
2494         ir_type   *const irtype = get_ir_type(declaration->type);
2495         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
2496         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
2497         set_entity_ld_ident(entity, id);
2498
2499         declaration->declaration_kind = (unsigned char) declaration_kind;
2500         declaration->v.entity         = entity;
2501         set_entity_variability(entity, variability_uninitialized);
2502         if(parent_type == get_tls_type())
2503                 set_entity_allocation(entity, allocation_automatic);
2504         else if(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
2505                 set_entity_allocation(entity, allocation_static);
2506         /* TODO: visibility? */
2507 }
2508
2509 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
2510
2511 enum compound_graph_entry_type_t {
2512         COMPOUND_GRAPH_ENTRY_ARRAY,
2513         COMPOUND_GRAPH_ENTRY_COMPOUND
2514 };
2515
2516 struct compound_graph_path_entry_t {
2517         int type;
2518         union {
2519                 ir_entity *entity;
2520                 int        array_index;
2521         } v;
2522         compound_graph_path_entry_t *prev;
2523 };
2524
2525 static void create_initializer_object(initializer_t *initializer, type_t *type,
2526                 ir_entity *entity, compound_graph_path_entry_t *entry, int len);
2527
2528 static compound_graph_path *create_compound_path(ir_type *type,
2529                 compound_graph_path_entry_t *entry, int len)
2530 {
2531         compound_graph_path *path = new_compound_graph_path(type, len);
2532
2533         int i = len - 1;
2534         for( ; entry != NULL; entry = entry->prev, --i) {
2535                 assert(i >= 0);
2536                 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
2537                         set_compound_graph_path_node(path, i, entry->v.entity);
2538                 } else {
2539                         assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
2540                         set_compound_graph_path_array_index(path, i, entry->v.array_index);
2541                 }
2542         }
2543         assert(i == -1);
2544
2545         return path;
2546 }
2547
2548 static void create_initializer_value(initializer_value_t *initializer,
2549                                      ir_entity *entity,
2550                                      compound_graph_path_entry_t *entry,
2551                                      int len)
2552 {
2553         ir_node             *node = expression_to_firm(initializer->value);
2554         ir_type             *type = get_entity_type(entity);
2555         compound_graph_path *path = create_compound_path(type, entry, len);
2556         add_compound_ent_value_w_path(entity, node, path);
2557 }
2558
2559 static void create_initializer_compound(initializer_list_t *initializer,
2560                                         compound_type_t *type,
2561                                         ir_entity *entity,
2562                                         compound_graph_path_entry_t *last_entry,
2563                                         int len)
2564 {
2565         declaration_t *compound_declaration = type->declaration;
2566
2567         declaration_t *compound_entry = compound_declaration->context.declarations;
2568
2569         compound_graph_path_entry_t entry;
2570         entry.type = COMPOUND_GRAPH_ENTRY_COMPOUND;
2571         entry.prev = last_entry;
2572         ++len;
2573
2574         size_t i = 0;
2575         for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
2576                 if(compound_entry->symbol == NULL)
2577                         continue;
2578                 if(compound_entry->namespc != NAMESPACE_NORMAL)
2579                         continue;
2580
2581                 if(i >= initializer->len)
2582                         break;
2583
2584                 entry.v.entity = compound_entry->v.entity;
2585
2586                 initializer_t *sub_initializer = initializer->initializers[i];
2587
2588                 assert(compound_entry != NULL);
2589                 assert(compound_entry->declaration_kind
2590                                 == DECLARATION_KIND_COMPOUND_MEMBER);
2591
2592                 if(sub_initializer->kind == INITIALIZER_VALUE) {
2593                         create_initializer_value(&sub_initializer->value,
2594                                                  entity, &entry, len);
2595                 } else {
2596                         type_t *entry_type = skip_typeref(compound_entry->type);
2597                         create_initializer_object(sub_initializer, entry_type, entity,
2598                                                   &entry, len);
2599                 }
2600
2601                 ++i;
2602         }
2603 }
2604
2605 static void create_initializer_array(initializer_list_t *initializer,
2606                                      array_type_t *type, ir_entity *entity,
2607                                      compound_graph_path_entry_t *last_entry,
2608                                      int len)
2609 {
2610         type_t *element_type = type->element_type;
2611         element_type         = skip_typeref(element_type);
2612
2613         compound_graph_path_entry_t entry;
2614         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2615         entry.prev = last_entry;
2616         ++len;
2617
2618         size_t i;
2619         for(i = 0; i < initializer->len; ++i) {
2620                 entry.v.array_index = i;
2621
2622                 initializer_t *sub_initializer = initializer->initializers[i];
2623
2624                 if(sub_initializer->kind == INITIALIZER_VALUE) {
2625                         create_initializer_value(&sub_initializer->value,
2626                                                  entity, &entry, len);
2627                 } else {
2628                         create_initializer_object(sub_initializer, element_type, entity,
2629                                                   &entry, len);
2630                 }
2631         }
2632
2633 #if 0
2634         /* TODO: initialize rest... */
2635         if(type->size_expression != NULL) {
2636                 size_t array_len = fold_constant(type->size_expression);
2637                 for( ; i < array_len; ++i) {
2638
2639                 }
2640         }
2641 #endif
2642 }
2643
2644 static void create_initializer_string(initializer_string_t *initializer,
2645                                       array_type_t *type, ir_entity *entity,
2646                                       compound_graph_path_entry_t *last_entry,
2647                                       int len)
2648 {
2649         type_t *element_type = type->element_type;
2650         element_type         = skip_typeref(element_type);
2651
2652         compound_graph_path_entry_t entry;
2653         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2654         entry.prev = last_entry;
2655         ++len;
2656
2657         ir_type    *irtype  = get_entity_type(entity);
2658         size_t      arr_len = get_array_type_size(type);
2659         const char *p       = initializer->string;
2660         size_t      i       = 0;
2661         for(i = 0; i < arr_len; ++i, ++p) {
2662                 entry.v.array_index = i;
2663
2664                 ir_node             *node = new_Const_long(mode_Bs, *p);
2665                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2666                 add_compound_ent_value_w_path(entity, node, path);
2667
2668                 if(*p == '\0')
2669                         break;
2670         }
2671 }
2672
2673 static void create_initializer_wide_string(
2674         const initializer_wide_string_t *const initializer, array_type_t *const type,
2675         ir_entity *const entity, compound_graph_path_entry_t *const last_entry,
2676         int len)
2677 {
2678         type_t *element_type = type->element_type;
2679         element_type         = skip_typeref(element_type);
2680
2681         compound_graph_path_entry_t entry;
2682         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2683         entry.prev = last_entry;
2684         ++len;
2685
2686         ir_type           *const irtype  = get_entity_type(entity);
2687         const size_t             arr_len = get_array_type_size(type);
2688         const wchar_rep_t *      p       = initializer->string.begin;
2689         const wchar_rep_t *const end     = p + initializer->string.size;
2690         for (size_t i = 0; i < arr_len && p != end; ++i, ++p) {
2691                 entry.v.array_index = i;
2692
2693                 ir_node             *node = new_Const_long(mode_int, *p);
2694                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2695                 add_compound_ent_value_w_path(entity, node, path);
2696         }
2697 }
2698
2699 static void create_initializer_object(initializer_t *initializer, type_t *type,
2700                 ir_entity *entity, compound_graph_path_entry_t *entry, int len)
2701 {
2702         if(is_type_array(type)) {
2703                 array_type_t *array_type = &type->array;
2704
2705                 switch (initializer->kind) {
2706                         case INITIALIZER_STRING: {
2707                                 initializer_string_t *const string = &initializer->string;
2708                                 create_initializer_string(string, array_type, entity, entry, len);
2709                                 return;
2710                         }
2711
2712                         case INITIALIZER_WIDE_STRING: {
2713                                 initializer_wide_string_t *const string = &initializer->wide_string;
2714                                 create_initializer_wide_string(string, array_type, entity, entry, len);
2715                                 return;
2716                         }
2717
2718                         case INITIALIZER_LIST: {
2719                                 initializer_list_t *const list = &initializer->list;
2720                                 create_initializer_array(list, array_type, entity, entry, len);
2721                                 return;
2722                         }
2723
2724                         case INITIALIZER_VALUE:
2725                                 break;
2726                 }
2727                 panic("Unhandled initializer");
2728         } else {
2729                 assert(initializer->kind == INITIALIZER_LIST);
2730                 initializer_list_t *list = &initializer->list;
2731
2732                 assert(is_type_compound(type));
2733                 compound_type_t *compound_type = &type->compound;
2734                 create_initializer_compound(list, compound_type, entity, entry, len);
2735         }
2736 }
2737
2738 static void create_initializer_local_variable_entity(declaration_t *declaration)
2739 {
2740         initializer_t *initializer = declaration->init.initializer;
2741         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
2742         ir_entity     *entity      = declaration->v.entity;
2743         ir_node       *memory      = get_store();
2744         ir_node       *nomem       = new_NoMem();
2745         ir_node       *frame       = get_irg_frame(current_ir_graph);
2746         ir_node       *addr        = new_d_simpleSel(dbgi, nomem, frame, entity);
2747
2748         if(initializer->kind == INITIALIZER_VALUE) {
2749                 initializer_value_t *initializer_value = &initializer->value;
2750
2751                 ir_node *value = expression_to_firm(initializer_value->value);
2752                 type_t  *type  = skip_typeref(declaration->type);
2753                 assign_value(dbgi, addr, type, value);
2754                 return;
2755         }
2756
2757         /* create a "template" entity which is copied to the entity on the stack */
2758         ident     *const id          = unique_ident("initializer");
2759         ir_type   *const irtype      = get_ir_type(declaration->type);
2760         ir_type   *const global_type = get_glob_type();
2761         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
2762         set_entity_ld_ident(init_entity, id);
2763
2764         set_entity_variability(init_entity, variability_initialized);
2765         set_entity_visibility(init_entity, visibility_local);
2766         set_entity_allocation(init_entity, allocation_static);
2767
2768         ir_graph *const old_current_ir_graph = current_ir_graph;
2769         current_ir_graph = get_const_code_irg();
2770
2771         type_t *const type = skip_typeref(declaration->type);
2772         create_initializer_object(initializer, type, init_entity, NULL, 0);
2773
2774         assert(current_ir_graph == get_const_code_irg());
2775         current_ir_graph = old_current_ir_graph;
2776
2777         ir_node *const src_addr  = create_symconst(dbgi, mode_P_data, init_entity);
2778         ir_node *const copyb     = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
2779
2780         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
2781         set_store(copyb_mem);
2782 }
2783
2784 static void create_initializer(declaration_t *declaration)
2785 {
2786         initializer_t *initializer = declaration->init.initializer;
2787         if(initializer == NULL)
2788                 return;
2789
2790         declaration_kind_t declaration_kind
2791                 = (declaration_kind_t) declaration->declaration_kind;
2792         if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
2793                 create_initializer_local_variable_entity(declaration);
2794                 return;
2795         }
2796
2797         if(initializer->kind == INITIALIZER_VALUE) {
2798                 initializer_value_t *initializer_value = &initializer->value;
2799
2800                 ir_node *value = expression_to_firm(initializer_value->value);
2801
2802                 if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2803                         set_value(declaration->v.value_number, value);
2804                 } else {
2805                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
2806
2807                         ir_entity *entity = declaration->v.entity;
2808
2809                         set_entity_variability(entity, variability_initialized);
2810                         set_atomic_ent_value(entity, value);
2811                 }
2812         } else {
2813                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
2814                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
2815
2816                 ir_entity *entity = declaration->v.entity;
2817                 set_entity_variability(entity, variability_initialized);
2818
2819                 type_t *type = skip_typeref(declaration->type);
2820                 create_initializer_object(initializer, type, entity, NULL, 0);
2821         }
2822 }
2823
2824 static void create_local_variable(declaration_t *declaration)
2825 {
2826         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
2827
2828         bool needs_entity = declaration->address_taken;
2829         type_t *type = skip_typeref(declaration->type);
2830
2831         if(is_type_array(type) || is_type_compound(type)) {
2832                 needs_entity = true;
2833         }
2834
2835         if(needs_entity) {
2836                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2837                 create_declaration_entity(declaration,
2838                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
2839                                           frame_type);
2840         } else {
2841                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
2842                 declaration->v.value_number   = next_value_number_function;
2843                 ++next_value_number_function;
2844         }
2845
2846         create_initializer(declaration);
2847 }
2848
2849 static void create_local_static_variable(declaration_t *declaration)
2850 {
2851         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
2852
2853         type_t    *const type        = skip_typeref(declaration->type);
2854         ir_type   *const global_type = get_glob_type();
2855         ident     *const id          = unique_ident(declaration->symbol->string);
2856         ir_type   *const irtype      = get_ir_type(type);
2857         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
2858         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2859         set_entity_ld_ident(entity, id);
2860
2861         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
2862         declaration->v.entity         = entity;
2863         set_entity_variability(entity, variability_uninitialized);
2864         set_entity_visibility(entity, visibility_local);
2865         set_entity_allocation(entity, allocation_static);
2866
2867         ir_graph *const old_current_ir_graph = current_ir_graph;
2868         current_ir_graph = get_const_code_irg();
2869
2870         create_initializer(declaration);
2871
2872         assert(current_ir_graph == get_const_code_irg());
2873         current_ir_graph = old_current_ir_graph;
2874 }
2875
2876
2877
2878 static void return_statement_to_firm(return_statement_t *statement)
2879 {
2880         if(get_cur_block() == NULL)
2881                 return;
2882
2883         ir_type *func_irtype = get_ir_type(current_function_decl->type);
2884
2885         dbg_info *dbgi  = get_dbg_info(&statement->statement.source_position);
2886
2887         ir_node *in[1];
2888         int      in_len;
2889         if(get_method_n_ress(func_irtype) > 0) {
2890                 ir_type *res_type = get_method_res_type(func_irtype, 0);
2891
2892                 if(statement->return_value != NULL) {
2893                         ir_node *node = expression_to_firm(statement->return_value);
2894                         node  = do_strict_conv(dbgi, node);
2895                         in[0] = node;
2896                 } else {
2897                         ir_mode *mode;
2898                         if(is_compound_type(res_type)) {
2899                                 mode = mode_P_data;
2900                         } else {
2901                                 mode = get_type_mode(res_type);
2902                         }
2903                         in[0] = new_Unknown(mode);
2904                 }
2905                 in_len = 1;
2906         } else {
2907                 /* build return_value for its side effects */
2908                 if(statement->return_value != NULL) {
2909                         expression_to_firm(statement->return_value);
2910                 }
2911                 in_len = 0;
2912         }
2913
2914         ir_node  *store = get_store();
2915         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
2916
2917         ir_node *end_block = get_irg_end_block(current_ir_graph);
2918         add_immBlock_pred(end_block, ret);
2919
2920         set_cur_block(NULL);
2921 }
2922
2923 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
2924 {
2925         if(get_cur_block() == NULL)
2926                 return NULL;
2927
2928         return expression_to_firm(statement->expression);
2929 }
2930
2931 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
2932 {
2933         ir_node     *result    = NULL;
2934         statement_t *statement = compound->statements;
2935         for( ; statement != NULL; statement = statement->base.next) {
2936                 //context2firm(&statement->context);
2937
2938                 if(statement->base.next == NULL
2939                                 && statement->kind == STATEMENT_EXPRESSION) {
2940                         result = expression_statement_to_firm(
2941                                         &statement->expression);
2942                         break;
2943                 }
2944                 statement_to_firm(statement);
2945         }
2946
2947         return result;
2948 }
2949
2950 static void create_local_declaration(declaration_t *declaration)
2951 {
2952         type_t *type = skip_typeref(declaration->type);
2953
2954         switch ((storage_class_tag_t) declaration->storage_class) {
2955         case STORAGE_CLASS_STATIC:
2956                 create_local_static_variable(declaration);
2957                 return;
2958         case STORAGE_CLASS_ENUM_ENTRY:
2959                 panic("enum entry declaration in local block found");
2960         case STORAGE_CLASS_EXTERN:
2961                 panic("extern declaration in local block found");
2962         case STORAGE_CLASS_NONE:
2963         case STORAGE_CLASS_AUTO:
2964         case STORAGE_CLASS_REGISTER:
2965                 if(is_type_function(type)) {
2966                         panic("nested functions not supported yet");
2967                 } else {
2968                         create_local_variable(declaration);
2969                 }
2970                 return;
2971         case STORAGE_CLASS_TYPEDEF:
2972         case STORAGE_CLASS_THREAD:
2973         case STORAGE_CLASS_THREAD_EXTERN:
2974         case STORAGE_CLASS_THREAD_STATIC:
2975                 return;
2976         }
2977         panic("invalid storage class found");
2978 }
2979
2980 static void declaration_statement_to_firm(declaration_statement_t *statement)
2981 {
2982         declaration_t *declaration = statement->declarations_begin;
2983         declaration_t *end         = statement->declarations_end->next;
2984         for( ; declaration != end; declaration = declaration->next) {
2985                 create_local_variable(declaration);
2986         }
2987 }
2988
2989 static void if_statement_to_firm(if_statement_t *statement)
2990 {
2991         ir_node *cur_block = get_cur_block();
2992
2993         ir_node *fallthrough_block = new_immBlock();
2994
2995         /* the true (blocks) */
2996         ir_node *true_block;
2997         if (statement->true_statement != NULL) {
2998                 true_block = new_immBlock();
2999                 statement_to_firm(statement->true_statement);
3000                 if(get_cur_block() != NULL) {
3001                         ir_node *jmp = new_Jmp();
3002                         add_immBlock_pred(fallthrough_block, jmp);
3003                 }
3004         } else {
3005                 true_block = fallthrough_block;
3006         }
3007
3008         /* the false (blocks) */
3009         ir_node *false_block;
3010         if(statement->false_statement != NULL) {
3011                 false_block = new_immBlock();
3012
3013                 statement_to_firm(statement->false_statement);
3014                 if(get_cur_block() != NULL) {
3015                         ir_node *jmp = new_Jmp();
3016                         add_immBlock_pred(fallthrough_block, jmp);
3017                 }
3018         } else {
3019                 false_block = fallthrough_block;
3020         }
3021
3022         /* create the condition */
3023         if(cur_block != NULL) {
3024                 set_cur_block(cur_block);
3025                 create_condition_evaluation(statement->condition, true_block,
3026                                             false_block);
3027         }
3028
3029         mature_immBlock(true_block);
3030         if(false_block != fallthrough_block) {
3031                 mature_immBlock(false_block);
3032         }
3033         mature_immBlock(fallthrough_block);
3034
3035         set_cur_block(fallthrough_block);
3036 }
3037
3038 static void while_statement_to_firm(while_statement_t *statement)
3039 {
3040         ir_node *jmp = NULL;
3041         if(get_cur_block() != NULL) {
3042                 jmp = new_Jmp();
3043         }
3044
3045         /* create the header block */
3046         ir_node *header_block = new_immBlock();
3047         if(jmp != NULL) {
3048                 add_immBlock_pred(header_block, jmp);
3049         }
3050
3051         /* the false block */
3052         ir_node *false_block = new_immBlock();
3053
3054         /* the loop body */
3055         ir_node *body_block;
3056         if (statement->body != NULL) {
3057                 ir_node *old_continue_label = continue_label;
3058                 ir_node *old_break_label    = break_label;
3059                 continue_label              = header_block;
3060                 break_label                 = false_block;
3061
3062                 body_block = new_immBlock();
3063                 statement_to_firm(statement->body);
3064
3065                 assert(continue_label == header_block);
3066                 assert(break_label    == false_block);
3067                 continue_label = old_continue_label;
3068                 break_label    = old_break_label;
3069
3070                 if(get_cur_block() != NULL) {
3071                         jmp = new_Jmp();
3072                         add_immBlock_pred(header_block, jmp);
3073                 }
3074         } else {
3075                 body_block = header_block;
3076         }
3077
3078         /* create the condition */
3079         set_cur_block(header_block);
3080
3081         create_condition_evaluation(statement->condition, body_block, false_block);
3082         mature_immBlock(body_block);
3083         mature_immBlock(false_block);
3084         mature_immBlock(header_block);
3085
3086         set_cur_block(false_block);
3087 }
3088
3089 static void do_while_statement_to_firm(do_while_statement_t *statement)
3090 {
3091         ir_node *jmp = NULL;
3092         if(get_cur_block() != NULL) {
3093                 jmp = new_Jmp();
3094         }
3095
3096         /* create the header block */
3097         ir_node *header_block = new_immBlock();
3098
3099         /* the false block */
3100         ir_node *false_block = new_immBlock();
3101
3102         /* the loop body */
3103         ir_node *body_block = new_immBlock();
3104         if(jmp != NULL) {
3105                 add_immBlock_pred(body_block, jmp);
3106         }
3107
3108         if (statement->body != NULL) {
3109                 ir_node *old_continue_label = continue_label;
3110                 ir_node *old_break_label    = break_label;
3111                 continue_label              = header_block;
3112                 break_label                 = false_block;
3113
3114                 statement_to_firm(statement->body);
3115
3116                 assert(continue_label == header_block);
3117                 assert(break_label    == false_block);
3118                 continue_label = old_continue_label;
3119                 break_label    = old_break_label;
3120
3121                 if (get_cur_block() == NULL) {
3122                         mature_immBlock(header_block);
3123                         mature_immBlock(body_block);
3124                         mature_immBlock(false_block);
3125                         return;
3126                 }
3127         }
3128
3129         ir_node *body_jmp = new_Jmp();
3130         add_immBlock_pred(header_block, body_jmp);
3131         mature_immBlock(header_block);
3132
3133         /* create the condition */
3134         set_cur_block(header_block);
3135
3136         create_condition_evaluation(statement->condition, body_block, false_block);
3137         mature_immBlock(body_block);
3138         mature_immBlock(false_block);
3139         mature_immBlock(header_block);
3140
3141         set_cur_block(false_block);
3142 }
3143
3144 static void for_statement_to_firm(for_statement_t *statement)
3145 {
3146         ir_node *jmp = NULL;
3147         if (get_cur_block() != NULL) {
3148                 if(statement->initialisation != NULL) {
3149                         expression_to_firm(statement->initialisation);
3150                 }
3151
3152                 /* create declarations */
3153                 declaration_t *declaration = statement->context.declarations;
3154                 for( ; declaration != NULL; declaration = declaration->next) {
3155                         create_local_declaration(declaration);
3156                 }
3157
3158                 jmp = new_Jmp();
3159         }
3160
3161
3162         /* create the step block */
3163         ir_node *const step_block = new_immBlock();
3164         if (statement->step != NULL) {
3165                 expression_to_firm(statement->step);
3166         }
3167         ir_node *const step_jmp = new_Jmp();
3168
3169         /* create the header block */
3170         ir_node *const header_block = new_immBlock();
3171         if (jmp != NULL) {
3172                 add_immBlock_pred(header_block, jmp);
3173         }
3174         add_immBlock_pred(header_block, step_jmp);
3175
3176         /* the false block */
3177         ir_node *const false_block = new_immBlock();
3178
3179         /* the loop body */
3180         ir_node * body_block;
3181         if (statement->body != NULL) {
3182                 ir_node *const old_continue_label = continue_label;
3183                 ir_node *const old_break_label    = break_label;
3184                 continue_label = step_block;
3185                 break_label    = false_block;
3186
3187                 body_block = new_immBlock();
3188                 statement_to_firm(statement->body);
3189
3190                 assert(continue_label == step_block);
3191                 assert(break_label    == false_block);
3192                 continue_label = old_continue_label;
3193                 break_label    = old_break_label;
3194
3195                 if (get_cur_block() != NULL) {
3196                         jmp = new_Jmp();
3197                         add_immBlock_pred(step_block, jmp);
3198                 }
3199         } else {
3200                 body_block = step_block;
3201         }
3202
3203         /* create the condition */
3204         set_cur_block(header_block);
3205         if (statement->condition != NULL) {
3206                 create_condition_evaluation(statement->condition, body_block,
3207                                             false_block);
3208         } else {
3209                 keep_alive(header_block);
3210                 jmp = new_Jmp();
3211                 add_immBlock_pred(body_block, jmp);
3212         }
3213
3214         mature_immBlock(body_block);
3215         mature_immBlock(false_block);
3216         mature_immBlock(step_block);
3217         mature_immBlock(header_block);
3218         mature_immBlock(false_block);
3219
3220         set_cur_block(false_block);
3221 }
3222
3223 static void create_jump_statement(const statement_t *statement,
3224                                   ir_node *target_block)
3225 {
3226         if(get_cur_block() == NULL)
3227                 return;
3228
3229         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
3230         ir_node  *jump = new_d_Jmp(dbgi);
3231         add_immBlock_pred(target_block, jump);
3232
3233         set_cur_block(NULL);
3234 }
3235
3236 static void switch_statement_to_firm(const switch_statement_t *statement)
3237 {
3238         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
3239
3240         ir_node *expression  = expression_to_firm(statement->expression);
3241         ir_node *cond        = new_d_Cond(dbgi, expression);
3242         ir_node *break_block = new_immBlock();
3243
3244         set_cur_block(NULL);
3245
3246         ir_node *const old_switch_cond       = current_switch_cond;
3247         ir_node *const old_break_label       = break_label;
3248         const bool     old_saw_default_label = saw_default_label;
3249         current_switch_cond                  = cond;
3250         break_label                          = break_block;
3251
3252         statement_to_firm(statement->body);
3253
3254         if(get_cur_block() != NULL) {
3255                 ir_node *jmp = new_Jmp();
3256                 add_immBlock_pred(break_block, jmp);
3257         }
3258
3259         if (!saw_default_label) {
3260                 set_cur_block(get_nodes_block(cond));
3261                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
3262                                                         MAGIC_DEFAULT_PN_NUMBER);
3263                 add_immBlock_pred(break_block, proj);
3264         }
3265
3266         assert(current_switch_cond == cond);
3267         assert(break_label         == break_block);
3268         current_switch_cond = old_switch_cond;
3269         break_label         = old_break_label;
3270         saw_default_label   = old_saw_default_label;
3271
3272         mature_immBlock(break_block);
3273         set_cur_block(break_block);
3274 }
3275
3276 static void case_label_to_firm(const case_label_statement_t *statement)
3277 {
3278         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
3279
3280         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
3281
3282         /* let's create a node and hope firm constant folding creates a Const
3283          * node... */
3284         ir_node *proj;
3285         set_cur_block(get_nodes_block(current_switch_cond));
3286         if(statement->expression) {
3287                 long pn = fold_constant(statement->expression);
3288                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
3289                         /* oops someone detected our cheating... */
3290                         panic("magic default pn used");
3291                 }
3292                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
3293         } else {
3294                 saw_default_label = true;
3295                 proj = new_d_defaultProj(dbgi, current_switch_cond,
3296                                          MAGIC_DEFAULT_PN_NUMBER);
3297         }
3298
3299         ir_node *block = new_immBlock();
3300         if (fallthrough != NULL) {
3301                 add_immBlock_pred(block, fallthrough);
3302         }
3303         add_immBlock_pred(block, proj);
3304         mature_immBlock(block);
3305
3306         if(statement->label_statement != NULL) {
3307                 statement_to_firm(statement->label_statement);
3308         }
3309 }
3310
3311 static ir_node *get_label_block(declaration_t *label)
3312 {
3313         assert(label->namespc == NAMESPACE_LABEL);
3314
3315         if(label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
3316                 return label->v.block;
3317         }
3318         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
3319
3320         ir_node *old_cur_block = get_cur_block();
3321         ir_node *block         = new_immBlock();
3322         set_cur_block(old_cur_block);
3323
3324         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
3325         label->v.block          = block;
3326
3327         ARR_APP1(ir_node *, imature_blocks, block);
3328
3329         return block;
3330 }
3331
3332 static void label_to_firm(const label_statement_t *statement)
3333 {
3334         ir_node *block = get_label_block(statement->label);
3335
3336         if(get_cur_block() != NULL) {
3337                 ir_node *jmp = new_Jmp();
3338                 add_immBlock_pred(block, jmp);
3339         }
3340
3341         set_cur_block(block);
3342         keep_alive(block);
3343
3344         if(statement->label_statement != NULL) {
3345                 statement_to_firm(statement->label_statement);
3346         }
3347 }
3348
3349 static void goto_to_firm(const goto_statement_t *statement)
3350 {
3351         if(get_cur_block() == NULL)
3352                 return;
3353
3354         ir_node *block = get_label_block(statement->label);
3355         ir_node *jmp   = new_Jmp();
3356         add_immBlock_pred(block, jmp);
3357
3358         set_cur_block(NULL);
3359 }
3360
3361 typedef enum modifier_t {
3362         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
3363         ASM_MODIFIER_READ_WRITE   = 1 << 1,
3364         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
3365         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
3366 } modifier_t;
3367
3368 #if 0
3369 static void asm_statement_to_firm(const asm_statement_t *statement)
3370 {
3371         bool needs_memory = false;
3372
3373         size_t         n_clobbers = 0;
3374         asm_clobber_t *clobber    = statement->clobbers;
3375         for( ; clobber != NULL; clobber = clobber->next) {
3376                 if(strcmp(clobber->clobber, "memory") == 0) {
3377                         needs_memory = true;
3378                         continue;
3379                 }
3380
3381                 ident *id = new_id_from_str(clobber->clobber);
3382                 obstack_ptr_grow(&asm_obst, id);
3383                 ++n_clobbers;
3384         }
3385         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
3386         ident **clobbers = NULL;
3387         if(n_clobbers > 0) {
3388                 clobbers = obstack_finish(&asm_obst);
3389         }
3390
3391         /* find and count input and output constraints */
3392         asm_constraint_t *constraint = statement->inputs;
3393         for( ; constraint != NULL; constraint = constraint->next) {
3394                 int  modifiers      = 0;
3395                 bool supports_memop = false;
3396                 for(const char *c = constraint->constraints; *c != 0; ++c) {
3397                         /* TODO: improve error messages */
3398                         switch(*c) {
3399                         case '?':
3400                         case '!':
3401                                 panic("multiple alternative assembler constraints not "
3402                                       "supported");
3403                         case 'm':
3404                         case 'o':
3405                         case 'V':
3406                         case '<':
3407                         case '>':
3408                         case 'X':
3409                                 supports_memop = true;
3410                                 obstack_1grow(&asm_obst, *c);
3411                                 break;
3412                         case '=':
3413                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
3414                                         panic("inconsistent register constraints");
3415                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
3416                                 break;
3417                         case '+':
3418                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
3419                                         panic("inconsistent register constraints");
3420                                 modifiers |= ASM_MODIFIER_READ_WRITE;
3421                                 break;
3422                         case '&':
3423                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
3424                                 panic("early clobber assembler constraint not supported yet");
3425                                 break;
3426                         case '%':
3427                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
3428                                 panic("commutative assembler constraint not supported yet");
3429                                 break;
3430                         case '#':
3431                                 /* skip register preferences stuff... */
3432                                 while(*c != 0 && *c != ',')
3433                                         ++c;
3434                                 break;
3435                         case '*':
3436                                 /* skip register preferences stuff... */
3437                                 ++c;
3438                                 break;
3439                         default:
3440                                 obstack_1grow(&asm_obst, *c);
3441                                 break;
3442                         }
3443                 }
3444                 obstack_1grow(&asm_obst, '\0');
3445                 const char *constraint_string = obstack_finish(&asm_obst);
3446
3447                 needs_memory |= supports_memop;
3448                 if(supports_memop) {
3449
3450                 }
3451         }
3452
3453 }
3454 #endif
3455
3456 static void statement_to_firm(statement_t *statement)
3457 {
3458         switch(statement->kind) {
3459         case STATEMENT_INVALID:
3460                 panic("invalid statement found");
3461         case STATEMENT_COMPOUND:
3462                 compound_statement_to_firm(&statement->compound);
3463                 return;
3464         case STATEMENT_RETURN:
3465                 return_statement_to_firm(&statement->returns);
3466                 return;
3467         case STATEMENT_EXPRESSION:
3468                 expression_statement_to_firm(&statement->expression);
3469                 return;
3470         case STATEMENT_IF:
3471                 if_statement_to_firm(&statement->ifs);
3472                 return;
3473         case STATEMENT_WHILE:
3474                 while_statement_to_firm(&statement->whiles);
3475                 return;
3476         case STATEMENT_DO_WHILE:
3477                 do_while_statement_to_firm(&statement->do_while);
3478                 return;
3479         case STATEMENT_DECLARATION:
3480                 declaration_statement_to_firm(&statement->declaration);
3481                 return;
3482         case STATEMENT_BREAK:
3483                 create_jump_statement(statement, break_label);
3484                 return;
3485         case STATEMENT_CONTINUE:
3486                 create_jump_statement(statement, continue_label);
3487                 return;
3488         case STATEMENT_SWITCH:
3489                 switch_statement_to_firm(&statement->switchs);
3490                 return;
3491         case STATEMENT_CASE_LABEL:
3492                 case_label_to_firm(&statement->case_label);
3493                 return;
3494         case STATEMENT_FOR:
3495                 for_statement_to_firm(&statement->fors);
3496                 return;
3497         case STATEMENT_LABEL:
3498                 label_to_firm(&statement->label);
3499                 return;
3500         case STATEMENT_GOTO:
3501                 goto_to_firm(&statement->gotos);
3502                 return;
3503         case STATEMENT_ASM:
3504                 //asm_statement_to_firm(&statement->asms);
3505                 //return;
3506                 break;
3507         }
3508         panic("Statement not implemented\n");
3509 }
3510
3511 static int count_decls_in_expression(const expression_t *expression);
3512
3513 static int count_local_declarations(const declaration_t *      decl,
3514                                     const declaration_t *const end)
3515 {
3516         int count = 0;
3517         for (; decl != end; decl = decl->next) {
3518                 const type_t *type = skip_typeref(decl->type);
3519                 switch (type->kind) {
3520                         case TYPE_ATOMIC:
3521                         case TYPE_ENUM:
3522                         case TYPE_POINTER:
3523                                 if (!decl->address_taken)
3524                                         ++count;
3525                                 break;
3526
3527                         default: break;
3528                 }
3529                 const initializer_t *initializer = decl->init.initializer;
3530                 /* FIXME: should walk initializer hierarchies... */
3531                 if(initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
3532                         count += count_decls_in_expression(initializer->value.value);
3533                 }
3534         }
3535         return count;
3536 }
3537
3538 static int count_decls_in_expression(const expression_t *expression) {
3539         if(expression == NULL)
3540                 return 0;
3541
3542         switch(expression->base.kind) {
3543         case EXPR_STATEMENT:
3544                 return count_decls_in_stmts(expression->statement.statement);
3545         EXPR_BINARY_CASES {
3546                 int count_left  = count_decls_in_expression(expression->binary.left);
3547                 int count_right = count_decls_in_expression(expression->binary.right);
3548                 return count_left + count_right;
3549         }
3550         EXPR_UNARY_CASES
3551                 return count_decls_in_expression(expression->unary.value);
3552
3553         default:
3554                 break;
3555         }
3556
3557         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
3558          * (or implement all the missing expressions here/implement a walker)
3559          */
3560
3561         return 0;
3562 }
3563
3564 static int count_decls_in_stmts(const statement_t *stmt)
3565 {
3566         int count = 0;
3567         for (; stmt != NULL; stmt = stmt->base.next) {
3568                 switch (stmt->kind) {
3569                         case STATEMENT_DECLARATION: {
3570                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
3571                                 count += count_local_declarations(decl_stmt->declarations_begin,
3572                                                                   decl_stmt->declarations_end->next);
3573                                 break;
3574                         }
3575
3576                         case STATEMENT_COMPOUND: {
3577                                 const compound_statement_t *const comp =
3578                                         &stmt->compound;
3579                                 count += count_decls_in_stmts(comp->statements);
3580                                 break;
3581                         }
3582
3583                         case STATEMENT_IF: {
3584                                 const if_statement_t *const if_stmt = &stmt->ifs;
3585                                 count += count_decls_in_expression(if_stmt->condition);
3586                                 count += count_decls_in_stmts(if_stmt->true_statement);
3587                                 count += count_decls_in_stmts(if_stmt->false_statement);
3588                                 break;
3589                         }
3590
3591                         case STATEMENT_SWITCH: {
3592                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
3593                                 count += count_decls_in_expression(switch_stmt->expression);
3594                                 count += count_decls_in_stmts(switch_stmt->body);
3595                                 break;
3596                         }
3597
3598                         case STATEMENT_LABEL: {
3599                                 const label_statement_t *const label_stmt = &stmt->label;
3600                                 count += count_decls_in_stmts(label_stmt->label_statement);
3601                                 break;
3602                         }
3603
3604                         case STATEMENT_WHILE: {
3605                                 const while_statement_t *const while_stmt = &stmt->whiles;
3606                                 count += count_decls_in_expression(while_stmt->condition);
3607                                 count += count_decls_in_stmts(while_stmt->body);
3608                                 break;
3609                         }
3610
3611                         case STATEMENT_DO_WHILE: {
3612                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
3613                                 count += count_decls_in_expression(do_while_stmt->condition);
3614                                 count += count_decls_in_stmts(do_while_stmt->body);
3615                                 break;
3616                         }
3617
3618                         case STATEMENT_FOR: {
3619                                 const for_statement_t *const for_stmt = &stmt->fors;
3620                                 count += count_local_declarations(for_stmt->context.declarations, NULL);
3621                                 count += count_decls_in_expression(for_stmt->initialisation);
3622                                 count += count_decls_in_expression(for_stmt->condition);
3623                                 count += count_decls_in_expression(for_stmt->step);
3624                                 count += count_decls_in_stmts(for_stmt->body);
3625                                 break;
3626                         }
3627
3628                         case STATEMENT_CASE_LABEL: {
3629                                 const case_label_statement_t *label = &stmt->case_label;
3630                                 count += count_decls_in_expression(label->expression);
3631                                 count += count_decls_in_stmts(label->label_statement);
3632                                 break;
3633                         }
3634
3635                         case STATEMENT_ASM:
3636                         case STATEMENT_BREAK:
3637                         case STATEMENT_CONTINUE:
3638                                 break;
3639
3640                         case STATEMENT_EXPRESSION: {
3641                                 const expression_statement_t *expr_stmt = &stmt->expression;
3642                                 count += count_decls_in_expression(expr_stmt->expression);
3643                                 break;
3644                         }
3645
3646                         case STATEMENT_GOTO:
3647                         case STATEMENT_INVALID:
3648                                 break;
3649
3650                         case STATEMENT_RETURN: {
3651                                 const return_statement_t *ret_stmt = &stmt->returns;
3652                                 count += count_decls_in_expression(ret_stmt->return_value);
3653                                 break;
3654                         }
3655                 }
3656         }
3657         return count;
3658 }
3659
3660 static int get_function_n_local_vars(declaration_t *declaration)
3661 {
3662         int count = 0;
3663
3664         /* count parameters */
3665         count += count_local_declarations(declaration->context.declarations, NULL);
3666
3667         /* count local variables declared in body */
3668         count += count_decls_in_stmts(declaration->init.statement);
3669
3670         return count;
3671 }
3672
3673 static void initialize_function_parameters(declaration_t *declaration)
3674 {
3675         ir_graph        *irg             = current_ir_graph;
3676         ir_node         *args            = get_irg_args(irg);
3677         ir_node         *start_block     = get_irg_start_block(irg);
3678         ir_type         *function_irtype = get_ir_type(declaration->type);
3679
3680         int            n         = 0;
3681         declaration_t *parameter = declaration->context.declarations;
3682         for( ; parameter != NULL; parameter = parameter->next, ++n) {
3683                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
3684                 type_t *type = skip_typeref(parameter->type);
3685
3686                 bool needs_entity = parameter->address_taken;
3687                 assert(!is_type_array(type));
3688                 if(is_type_compound(type)) {
3689                         needs_entity = true;
3690                 }
3691
3692                 if(needs_entity) {
3693                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
3694                         ident     *id     = new_id_from_str(parameter->symbol->string);
3695                         set_entity_ident(entity, id);
3696
3697                         parameter->declaration_kind
3698                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
3699                         parameter->v.entity = entity;
3700                         continue;
3701                 }
3702
3703                 ir_mode *mode = get_ir_mode(parameter->type);
3704                 long     pn   = n;
3705                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
3706
3707                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3708                 parameter->v.value_number   = next_value_number_function;
3709                 ++next_value_number_function;
3710
3711                 set_value(parameter->v.value_number, proj);
3712         }
3713 }
3714
3715 /**
3716  * Handle additional decl modifiers for IR-graphs
3717  *
3718  * @param irg            the IR-graph
3719  * @param dec_modifiers  additional modifiers
3720  */
3721 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
3722 {
3723         if (decl_modifiers & DM_NORETURN) {
3724                 /* TRUE if the declaration includes the Microsoft
3725                    __declspec(noreturn) specifier. */
3726                 set_irg_additional_property(irg, mtp_property_noreturn);
3727         }
3728         if (decl_modifiers & DM_NOTHROW) {
3729                 /* TRUE if the declaration includes the Microsoft
3730                    __declspec(nothrow) specifier. */
3731                 set_irg_additional_property(irg, mtp_property_nothrow);
3732         }
3733         if (decl_modifiers & DM_NAKED) {
3734                 /* TRUE if the declaration includes the Microsoft
3735                    __declspec(naked) specifier. */
3736                 set_irg_additional_property(irg, mtp_property_naked);
3737         }
3738         if (decl_modifiers & DM_FORCEINLINE) {
3739                 /* TRUE if the declaration includes the
3740                    Microsoft __forceinline specifier. */
3741                 set_irg_inline_property(irg, irg_inline_forced);
3742         }
3743         if (decl_modifiers & DM_NOINLINE) {
3744                 /* TRUE if the declaration includes the Microsoft
3745                    __declspec(noinline) specifier. */
3746                 set_irg_inline_property(irg, irg_inline_forbidden);
3747         }
3748 }
3749
3750 static void create_function(declaration_t *declaration)
3751 {
3752         ir_entity *function_entity = get_function_entity(declaration);
3753
3754         if(declaration->init.statement == NULL)
3755                 return;
3756
3757         current_function_decl = declaration;
3758         current_function_name = NULL;
3759
3760         assert(imature_blocks == NULL);
3761         imature_blocks = NEW_ARR_F(ir_node*, 0);
3762
3763         int       n_local_vars = get_function_n_local_vars(declaration);
3764         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
3765         ir_node  *first_block  = get_cur_block();
3766
3767         /* set inline flags */
3768         if (declaration->is_inline)
3769         set_irg_inline_property(irg, irg_inline_recomended);
3770     handle_decl_modifier_irg(irg, declaration->modifiers);
3771
3772         next_value_number_function = 0;
3773         initialize_function_parameters(declaration);
3774
3775         statement_to_firm(declaration->init.statement);
3776
3777         ir_node *end_block = get_irg_end_block(irg);
3778
3779         /* do we have a return statement yet? */
3780         if(get_cur_block() != NULL) {
3781                 type_t *type = skip_typeref(declaration->type);
3782                 assert(is_type_function(type));
3783                 const function_type_t *func_type   = &type->function;
3784                 const type_t          *return_type
3785                         = skip_typeref(func_type->return_type);
3786
3787                 ir_node *ret;
3788                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
3789                         ret = new_Return(get_store(), 0, NULL);
3790                 } else {
3791                         ir_mode *mode;
3792                         if(is_type_scalar(return_type)) {
3793                                 mode = get_ir_mode(func_type->return_type);
3794                         } else {
3795                                 mode = mode_P_data;
3796                         }
3797
3798                         ir_node *in[1];
3799                         /* §5.1.2.2.3 main implicitly returns 0 */
3800                         if (strcmp(declaration->symbol->string, "main") == 0) {
3801                                 in[0] = new_Const(mode, get_mode_null(mode));
3802                         } else {
3803                                 in[0] = new_Unknown(mode);
3804                         }
3805                         ret = new_Return(get_store(), 1, in);
3806                 }
3807                 add_immBlock_pred(end_block, ret);
3808         }
3809
3810         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
3811                 mature_immBlock(imature_blocks[i]);
3812         }
3813         DEL_ARR_F(imature_blocks);
3814         imature_blocks = NULL;
3815
3816         mature_immBlock(first_block);
3817         mature_immBlock(end_block);
3818
3819         irg_finalize_cons(irg);
3820
3821         /* finalize the frame type */
3822         ir_type *frame_type = get_irg_frame_type(irg);
3823         int      n          = get_compound_n_members(frame_type);
3824         int      align_all  = 4;
3825         int      offset     = 0;
3826         for(int i = 0; i < n; ++i) {
3827                 ir_entity *entity      = get_compound_member(frame_type, i);
3828                 ir_type   *entity_type = get_entity_type(entity);
3829
3830                 int align = get_type_alignment_bytes(entity_type);
3831                 if(align > align_all)
3832                         align_all = align;
3833                 int misalign = 0;
3834                 if(align > 0) {
3835                         misalign  = offset % align;
3836                         if(misalign > 0) {
3837                                 offset += align - misalign;
3838                         }
3839                 }
3840
3841                 set_entity_offset(entity, offset);
3842                 offset += get_type_size_bytes(entity_type);
3843         }
3844         set_type_size_bytes(frame_type, offset);
3845         set_type_alignment_bytes(frame_type, align_all);
3846         set_type_state(frame_type, layout_fixed);
3847
3848         irg_vrfy(irg);
3849 }
3850
3851 static void create_global_variable(declaration_t *declaration)
3852 {
3853         ir_visibility  vis;
3854         ir_type       *var_type;
3855         switch ((storage_class_tag_t)declaration->storage_class) {
3856                 case STORAGE_CLASS_STATIC:
3857                         vis = visibility_local;
3858                         goto global_var;
3859
3860                 case STORAGE_CLASS_EXTERN:
3861                         vis = visibility_external_allocated;
3862                         goto global_var;
3863
3864                 case STORAGE_CLASS_NONE:
3865                         vis = visibility_external_visible;
3866                         goto global_var;
3867
3868                 case STORAGE_CLASS_THREAD:
3869                         vis = visibility_external_visible;
3870                         goto tls_var;
3871
3872                 case STORAGE_CLASS_THREAD_EXTERN:
3873                         vis = visibility_external_allocated;
3874                         goto tls_var;
3875
3876                 case STORAGE_CLASS_THREAD_STATIC:
3877                         vis = visibility_local;
3878                         goto tls_var;
3879
3880 tls_var:
3881                         var_type = get_tls_type();
3882                         goto create_var;
3883
3884 global_var:
3885                         var_type = get_glob_type();
3886                         goto create_var;
3887
3888 create_var:
3889                         create_declaration_entity(declaration,
3890                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
3891                                                   var_type);
3892                         set_entity_visibility(declaration->v.entity, vis);
3893
3894                         current_ir_graph = get_const_code_irg();
3895                         create_initializer(declaration);
3896                         return;
3897
3898                 case STORAGE_CLASS_TYPEDEF:
3899                 case STORAGE_CLASS_AUTO:
3900                 case STORAGE_CLASS_REGISTER:
3901                 case STORAGE_CLASS_ENUM_ENTRY:
3902                         break;
3903         }
3904         panic("Invalid storage class for global variable");
3905 }
3906
3907 static void context_to_firm(context_t *context)
3908 {
3909         /* first pass: create declarations */
3910         declaration_t *declaration = context->declarations;
3911         for( ; declaration != NULL; declaration = declaration->next) {
3912                 if(declaration->namespc != NAMESPACE_NORMAL)
3913                         continue;
3914                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3915                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3916                         continue;
3917                 if(declaration->symbol == NULL)
3918                         continue;
3919
3920                 type_t *type = skip_typeref(declaration->type);
3921                 if(is_type_function(type)) {
3922                         get_function_entity(declaration);
3923                 } else {
3924                         create_global_variable(declaration);
3925                 }
3926         }
3927
3928         /* second pass: create code */
3929         declaration = context->declarations;
3930         for( ; declaration != NULL; declaration = declaration->next) {
3931                 if(declaration->namespc != NAMESPACE_NORMAL)
3932                         continue;
3933                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3934                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3935                         continue;
3936                 if(declaration->symbol == NULL)
3937                         continue;
3938
3939                 type_t *type = declaration->type;
3940                 if(type->kind != TYPE_FUNCTION)
3941                         continue;
3942
3943                 create_function(declaration);
3944         }
3945 }
3946
3947 void init_ast2firm(void)
3948 {
3949         obstack_init(&asm_obst);
3950         init_atomic_modes();
3951
3952         /* create idents for all known runtime functions */
3953         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
3954                 predef_idents[rts_data[i].id] = new_id_from_str(rts_data[i].name);
3955         }
3956 }
3957
3958 void exit_ast2firm(void)
3959 {
3960         obstack_free(&asm_obst, NULL);
3961 }
3962
3963 void translation_unit_to_firm(translation_unit_t *unit)
3964 {
3965         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
3966         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
3967         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
3968
3969         ir_type_int        = get_ir_type(type_int);
3970         ir_type_const_char = get_ir_type(type_const_char);
3971         ir_type_wchar_t    = get_ir_type(type_wchar_t);
3972         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
3973                                                        type in firm */
3974
3975         type_void->base.firm_type = ir_type_void;
3976
3977         /* just to be sure */
3978         continue_label      = NULL;
3979         break_label         = NULL;
3980         current_switch_cond = NULL;
3981
3982         context_to_firm(&unit->context);
3983 }