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 "diagnostic.h"
  21 #include "lang_features.h"
  22 #include "types.h"
  23 #include "driver/firm_opt.h"
  24 #include "driver/firm_cmdline.h"
  25
  26 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  27
  28 static ir_type *ir_type_const_char;
  29 static ir_type *ir_type_wchar_t;
  30 static ir_type *ir_type_void;
  31 static ir_type *ir_type_int;
  32
  33 static type_t *type_const_char;
  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         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  64
  65         warningf(declaration->source_position,
  66                  "variable '%#T' might be used uninitialized",
  67                  declaration->type, declaration->symbol);
  68         return new_r_Unknown(irg, mode);
  69 }
  70
  71 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  72 {
  73         const source_position_t *pos = (const source_position_t*) dbg;
  74         if(pos == NULL)
  75                 return 0;
  76         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  77                                    pos->linenr);
  78 }
  79
  80 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
  81 {
  82         const source_position_t *pos = (const source_position_t*) dbg;
  83         if(pos == NULL)
  84                 return NULL;
  85         if(line != NULL)
  86                 *line = pos->linenr;
  87         return pos->input_name;
  88 }
  89
  90 static dbg_info *get_dbg_info(const source_position_t *pos)
  91 {
  92         return (dbg_info*) pos;
  93 }
  94
  95 static unsigned unique_id = 0;
  96
  97 static ident *unique_ident(const char *tag)
  98 {
  99         char buf[256];
 100
 101         snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
 102         unique_id++;
 103         return new_id_from_str(buf);
 104 }
 105
 106 /**
 107  * Return the signed integer mode of size bytes.
 108  *
 109  * @param size   the size
 110  */
 111 static ir_mode *get_smode(unsigned size)
 112 {
 113         static ir_mode *s_modes[16 + 1] = {0, };
 114         ir_mode *res;
 115
 116         if (size <= 0 || size > 16)
 117                 return NULL;
 118
 119         res = s_modes[size];
 120         if (res == NULL) {
 121                 unsigned bits;
 122         char name[32];
 123
 124         bits = size * 8;
 125         snprintf(name, sizeof(name), "i%u", bits);
 126         res = new_ir_mode(name, irms_int_number, bits, 1, irma_twos_complement,
 127                                         bits <= machine_size ? machine_size : bits );
 128
 129                 s_modes[size] = res;
 130         }
 131         return res;
 132 }
 133
 134 /**
 135  * Return the unsigned integer mode of size bytes.
 136  *
 137  * @param size  the size
 138  */
 139 static ir_mode *get_umode(unsigned size)
 140 {
 141         static ir_mode *u_modes[16 + 1] = {0, };
 142         ir_mode *res;
 143
 144         if (size <= 0 || size > 16)
 145                 return NULL;
 146
 147         res = u_modes[size];
 148         if (res == NULL) {
 149                 unsigned bits;
 150                 char name[32];
 151
 152                 bits = size * 8;
 153                 snprintf(name, sizeof(name), "u%u", bits);
 154                 res = new_ir_mode(name, irms_int_number, bits, 0, irma_twos_complement,
 155                                                 bits <= machine_size ? machine_size : bits );
 156
 157                 u_modes[size] = res;
 158         }
 159         return res;
 160 }
 161
 162 /**
 163  * Return the pointer mode of size bytes.
 164  *
 165  * @param size  the size
 166  */
 167 static ir_mode *get_ptrmode(unsigned size, char *name)
 168 {
 169         static ir_mode *p_modes[16 + 1] = {0, };
 170         ir_mode *res;
 171
 172         if (size <= 0 || size > 16)
 173                 return NULL;
 174
 175         res = p_modes[size];
 176         if (res == NULL) {
 177                 unsigned bits;
 178                 char buf[32];
 179
 180                 bits = size * 8;
 181                 if (name == NULL) {
 182                         snprintf(buf, sizeof(buf), "p%u", bits);
 183                         name = buf;
 184                 }
 185                 res = new_ir_mode(name, irms_reference, bits, 0, irma_twos_complement,
 186                                                 bits <= machine_size ? machine_size : bits);
 187
 188                 p_modes[size] = res;
 189
 190                 set_reference_mode_signed_eq(res, get_smode(size));
 191                 set_reference_mode_unsigned_eq(res, get_umode(size));
 192         }
 193         return res;
 194 }
 195
 196 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST];
 197
 198 static ir_mode *mode_int, *mode_uint;
 199
 200 /**
 201  * Initialises the atomic modes depending on the machine size.
 202  */
 203 static void init_atomic_modes(void) {
 204         unsigned int_size   = machine_size < 32 ? 2 : 4;
 205         unsigned long_size  = machine_size < 64 ? 4 : 8;
 206         unsigned llong_size = machine_size < 32 ? 4 : 8;
 207
 208         /* firm has no real void... */
 209         _atomic_modes[ATOMIC_TYPE_VOID]        = mode_T;
 210         _atomic_modes[ATOMIC_TYPE_CHAR]        = char_is_signed ? get_smode(1) : get_umode(1);
 211         _atomic_modes[ATOMIC_TYPE_SCHAR]       = get_smode(1);
 212         _atomic_modes[ATOMIC_TYPE_UCHAR]       = get_umode(1);
 213         _atomic_modes[ATOMIC_TYPE_SHORT]       = get_smode(2);
 214         _atomic_modes[ATOMIC_TYPE_USHORT]      = get_umode(2);
 215         _atomic_modes[ATOMIC_TYPE_INT]         = get_smode(int_size);
 216         _atomic_modes[ATOMIC_TYPE_UINT]        = get_umode(int_size);
 217         _atomic_modes[ATOMIC_TYPE_LONG]        = get_smode(long_size);
 218         _atomic_modes[ATOMIC_TYPE_ULONG]       = get_umode(long_size);
 219         _atomic_modes[ATOMIC_TYPE_LONGLONG]    = get_smode(llong_size);
 220         _atomic_modes[ATOMIC_TYPE_ULONGLONG]   = get_umode(llong_size);
 221         _atomic_modes[ATOMIC_TYPE_FLOAT]       = mode_F;
 222         _atomic_modes[ATOMIC_TYPE_DOUBLE]      = mode_D;
 223         _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE] = mode_E;
 224         _atomic_modes[ATOMIC_TYPE_BOOL]        = get_umode(int_size);
 225
 226 #ifdef PROVIDE_COMPLEX
 227         _atomic_modes[ATOMIC_TYPE_BOOL]                  = _atomic_modes[ATOMIC_TYPE_INT];
 228         _atomic_modes[ATOMIC_TYPE_FLOAT_IMAGINARY]       = _atomic_modes[ATOMIC_TYPE_FLOAT];
 229         _atomic_modes[ATOMIC_TYPE_DOUBLE_IMAGINARY]      = _atomic_modes[ATOMIC_TYPE_DOUBLE];
 230         _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY] = _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE];
 231 #endif
 232
 233         /* Hmm, pointers should be machine size */
 234         set_modeP_data(get_ptrmode(machine_size >> 3, NULL));
 235         set_modeP_code(get_ptrmode(machine_size >> 3, NULL));
 236
 237         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 238         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 239 }
 240
 241 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 242 {
 243         ir_mode *res = NULL;
 244         if ((unsigned)atomic_type->akind < (unsigned)ATOMIC_TYPE_LAST)
 245                 res = _atomic_modes[(unsigned)atomic_type->akind];
 246         if (res == NULL)
 247                 panic("Encountered unknown atomic type");
 248         return res;
 249 }
 250
 251 static unsigned get_type_size(type_t *type);
 252
 253 static unsigned get_atomic_type_size(const atomic_type_t *type)
 254 {
 255         switch(type->akind) {
 256         case ATOMIC_TYPE_CHAR:
 257         case ATOMIC_TYPE_SCHAR:
 258         case ATOMIC_TYPE_UCHAR:
 259                 return 1;
 260
 261         case ATOMIC_TYPE_SHORT:
 262         case ATOMIC_TYPE_USHORT:
 263                 return 2;
 264
 265         case ATOMIC_TYPE_BOOL:
 266         case ATOMIC_TYPE_INT:
 267         case ATOMIC_TYPE_UINT:
 268                 return machine_size >> 3;
 269
 270         case ATOMIC_TYPE_LONG:
 271         case ATOMIC_TYPE_ULONG:
 272                 return machine_size > 16 ? machine_size >> 3 : 4;
 273
 274         case ATOMIC_TYPE_LONGLONG:
 275         case ATOMIC_TYPE_ULONGLONG:
 276                 return machine_size > 16 ? 8 : 4;
 277
 278         case ATOMIC_TYPE_FLOAT:
 279                 return 4;
 280
 281         case ATOMIC_TYPE_DOUBLE:
 282                 return 8;
 283
 284         case ATOMIC_TYPE_LONG_DOUBLE:
 285                 return 12;
 286
 287         case ATOMIC_TYPE_VOID:
 288                 return 1;
 289
 290         case ATOMIC_TYPE_INVALID:
 291         case ATOMIC_TYPE_LAST:
 292                 break;
 293         }
 294         panic("Trying to determine size of invalid atomic type");
 295 }
 296
 297 static unsigned get_compound_type_size(compound_type_t *type)
 298 {
 299         ir_type *irtype = get_ir_type((type_t*) type);
 300         return get_type_size_bytes(irtype);
 301 }
 302
 303 static unsigned get_array_type_size(array_type_t *type)
 304 {
 305         ir_type *irtype = get_ir_type((type_t*) type);
 306         return get_type_size_bytes(irtype);
 307 }
 308
 309
 310 static unsigned get_type_size(type_t *type)
 311 {
 312         type = skip_typeref(type);
 313
 314         switch(type->kind) {
 315         case TYPE_ERROR:
 316                 panic("error type occured");
 317         case TYPE_ATOMIC:
 318                 return get_atomic_type_size(&type->atomic);
 319         case TYPE_ENUM:
 320                 return get_mode_size_bytes(mode_int);
 321         case TYPE_COMPOUND_UNION:
 322         case TYPE_COMPOUND_STRUCT:
 323                 return get_compound_type_size(&type->compound);
 324         case TYPE_FUNCTION:
 325                 /* just a pointer to the function */
 326                 return get_mode_size_bytes(mode_P_code);
 327         case TYPE_POINTER:
 328                 return get_mode_size_bytes(mode_P_data);
 329         case TYPE_ARRAY:
 330                 return get_array_type_size(&type->array);
 331         case TYPE_BUILTIN:
 332                 return get_type_size(type->builtin.real_type);
 333         case TYPE_BITFIELD:
 334                 panic("type size of bitfield request");
 335         case TYPE_TYPEDEF:
 336         case TYPE_TYPEOF:
 337         case TYPE_INVALID:
 338                 break;
 339         }
 340         panic("Trying to determine size of invalid type");
 341 }
 342
 343 static unsigned count_parameters(const function_type_t *function_type)
 344 {
 345         unsigned count = 0;
 346
 347         function_parameter_t *parameter = function_type->parameters;
 348         for ( ; parameter != NULL; parameter = parameter->next) {
 349                 ++count;
 350         }
 351
 352         return count;
 353 }
 354
 355
 356 static ir_type *create_atomic_type(const atomic_type_t *type)
 357 {
 358         dbg_info *dbgi  = get_dbg_info(&type->type.source_position);
 359         ir_mode *mode   = get_atomic_mode(type);
 360         ident   *id     = get_mode_ident(mode);
 361         ir_type *irtype = new_d_type_primitive(id, mode, dbgi);
 362
 363         if(type->akind == ATOMIC_TYPE_LONG_DOUBLE
 364                         || type->akind == ATOMIC_TYPE_DOUBLE) {
 365                 set_type_alignment_bytes(irtype, 4);
 366         }
 367
 368         return irtype;
 369 }
 370
 371 static ir_type *create_method_type(const function_type_t *function_type)
 372 {
 373         type_t  *return_type  = function_type->return_type;
 374
 375         ident   *id           = unique_ident("functiontype");
 376         int      n_parameters = count_parameters(function_type);
 377         int      n_results    = return_type == type_void ? 0 : 1;
 378         dbg_info *dbgi        = get_dbg_info(&function_type->type.source_position);
 379         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 380
 381         if(return_type != type_void) {
 382                 ir_type *restype = get_ir_type(return_type);
 383                 set_method_res_type(irtype, 0, restype);
 384         }
 385
 386         function_parameter_t *parameter = function_type->parameters;
 387         int                   n         = 0;
 388         for( ; parameter != NULL; parameter = parameter->next) {
 389                 ir_type *p_irtype = get_ir_type(parameter->type);
 390                 set_method_param_type(irtype, n, p_irtype);
 391                 ++n;
 392         }
 393
 394         if(function_type->variadic || function_type->unspecified_parameters) {
 395                 set_method_variadicity(irtype, variadicity_variadic);
 396         }
 397
 398         return irtype;
 399 }
 400
 401 static ir_type *create_pointer_type(pointer_type_t *type)
 402 {
 403         type_t  *points_to = type->points_to;
 404         ir_type *ir_points_to;
 405         /* Avoid endless recursion if the points_to type contains this poiner type
 406          * again (might be a struct). We therefore first create a void* pointer
 407          * and then set the real points_to type
 408          */
 409         dbg_info *dbgi   = get_dbg_info(&type->type.source_position);
 410         ir_type *ir_type = new_d_type_pointer(unique_ident("pointer"),
 411                                             ir_type_void, mode_P_data, dbgi);
 412         type->type.firm_type  = ir_type;
 413
 414         ir_points_to = get_ir_type(points_to);
 415         set_pointer_points_to_type(ir_type, ir_points_to);
 416
 417         return ir_type;
 418 }
 419
 420 static ir_type *create_array_type(array_type_t *type)
 421 {
 422         type_t  *element_type    = type->element_type;
 423         ir_type *ir_element_type = get_ir_type(element_type);
 424
 425         ident    *id      = unique_ident("array");
 426         dbg_info *dbgi    = get_dbg_info(&type->type.source_position);
 427         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 428
 429         const int align = get_type_alignment_bytes(ir_element_type);
 430         set_type_alignment_bytes(ir_type, align);
 431
 432         if(type->size_constant) {
 433                 int n_elements = type->size;
 434
 435                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 436
 437                 size_t elemsize = get_type_size_bytes(ir_element_type);
 438                 if(elemsize % align > 0) {
 439                         elemsize += align - (elemsize % align);
 440                 }
 441                 set_type_size_bytes(ir_type, n_elements * elemsize);
 442         } else {
 443                 set_array_lower_bound_int(ir_type, 0, 0);
 444         }
 445         set_type_state(ir_type, layout_fixed);
 446
 447         return ir_type;
 448 }
 449
 450 /**
 451  * Return the signed integer type of size bits.
 452  *
 453  * @param size   the size
 454  */
 455 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 456                                                  unsigned size)
 457 {
 458         static ir_mode *s_modes[64 + 1] = {NULL, };
 459         ir_type *res;
 460         ir_mode *mode;
 461
 462         if (size <= 0 || size > 64)
 463                 return NULL;
 464
 465         mode = s_modes[size];
 466         if (mode == NULL) {
 467                 char name[32];
 468
 469                 snprintf(name, sizeof(name), "bf_I%u", size);
 470                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 471                                    size <= 32 ? 32 : size );
 472                 s_modes[size] = mode;
 473         }
 474
 475         char name[32];
 476         snprintf(name, sizeof(name), "I%u", size);
 477         ident *id = new_id_from_str(name);
 478         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 479         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 480         set_primitive_base_type(res, base_tp);
 481
 482         return res;
 483 }
 484
 485 /**
 486  * Return the unsigned integer type of size bits.
 487  *
 488  * @param size   the size
 489  */
 490 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 491                                                    unsigned size)
 492 {
 493         static ir_mode *u_modes[64 + 1] = {NULL, };
 494         ir_type *res;
 495         ir_mode *mode;
 496
 497         if (size <= 0 || size > 64)
 498                 return NULL;
 499
 500         mode = u_modes[size];
 501         if (mode == NULL) {
 502                 char name[32];
 503
 504                 snprintf(name, sizeof(name), "bf_U%u", size);
 505                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 506                                    size <= 32 ? 32 : size );
 507                 u_modes[size] = mode;
 508         }
 509
 510         char name[32];
 511
 512         snprintf(name, sizeof(name), "U%u", size);
 513         ident *id = new_id_from_str(name);
 514         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 515         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 516         set_primitive_base_type(res, base_tp);
 517
 518         return res;
 519 }
 520
 521 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 522 {
 523         type_t *base = skip_typeref(type->base);
 524         assert(base->kind == TYPE_ATOMIC);
 525         ir_type *irbase = get_ir_type(base);
 526
 527         unsigned size = fold_constant(type->size);
 528
 529         assert(!is_type_float(base));
 530         if(is_type_signed(base)) {
 531                 return get_signed_int_type_for_bit_size(irbase, size);
 532         } else {
 533                 return get_unsigned_int_type_for_bit_size(irbase, size);
 534         }
 535 }
 536
 537 #define INVALID_TYPE ((ir_type_ptr)-1)
 538
 539 static ir_type *create_union_type(compound_type_t *type, ir_type *irtype,
 540                                   size_t *outer_offset, size_t *outer_align);
 541
 542 static ir_type *create_struct_type(compound_type_t *type, ir_type *irtype,
 543                                    size_t *outer_offset, size_t *outer_align)
 544 {
 545         declaration_t *declaration = type->declaration;
 546         if(declaration->v.irtype != NULL) {
 547                 return declaration->v.irtype;
 548         }
 549
 550         size_t align_all  = 1;
 551         size_t offset     = 0;
 552         size_t bit_offset = 0;
 553         if(irtype == NULL) {
 554                 symbol_t *symbol = declaration->symbol;
 555                 ident    *id;
 556                 if(symbol != NULL) {
 557                         id = unique_ident(symbol->string);
 558                 } else {
 559                         id = unique_ident("__anonymous_struct");
 560                 }
 561                 dbg_info *dbgi  = get_dbg_info(&type->type.source_position);
 562
 563                 irtype = new_d_type_struct(id, dbgi);
 564
 565                 declaration->v.irtype = irtype;
 566                 type->type.firm_type  = irtype;
 567         } else {
 568                 offset    = *outer_offset;
 569                 align_all = *outer_align;
 570         }
 571
 572         declaration_t *entry = declaration->scope.declarations;
 573         for( ; entry != NULL; entry = entry->next) {
 574                 if(entry->namespc != NAMESPACE_NORMAL)
 575                         continue;
 576
 577                 symbol_t *symbol     = entry->symbol;
 578                 type_t   *entry_type = skip_typeref(entry->type);
 579                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 580                 ident    *ident;
 581                 if(symbol != NULL) {
 582                         ident = new_id_from_str(symbol->string);
 583                 } else {
 584                         if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
 585                                 create_struct_type(&entry_type->compound, irtype, &offset,
 586                                                    &align_all);
 587                                 continue;
 588                         } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
 589                                 create_union_type(&entry_type->compound, irtype, &offset,
 590                                                   &align_all);
 591                                 continue;
 592                         } else {
 593                                 assert(entry_type->kind == TYPE_BITFIELD);
 594                         }
 595                         ident = unique_ident("anon");
 596                 }
 597
 598                 ir_type *base_irtype;
 599                 if(entry_type->kind == TYPE_BITFIELD) {
 600                         base_irtype = get_ir_type(entry_type->bitfield.base);
 601                 } else {
 602                         base_irtype = get_ir_type(entry_type);
 603                 }
 604
 605                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 606                 size_t misalign        = offset % entry_alignment;
 607
 608                 ir_type   *entry_irtype = get_ir_type(entry_type);
 609                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 610
 611                 size_t base;
 612                 size_t bits_remainder;
 613                 if(entry_type->kind == TYPE_BITFIELD) {
 614                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 615                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 616
 617                         if(size_bits > rest_size_bits) {
 618                                 /* start a new bucket */
 619                                 offset     += entry_alignment - misalign;
 620                                 bit_offset  = 0;
 621
 622                                 base           = offset;
 623                                 bits_remainder = 0;
 624                         } else {
 625                                 /* put into current bucket */
 626                                 base           = offset - misalign;
 627                                 bits_remainder = misalign * 8 + bit_offset;
 628                         }
 629
 630                         offset     += size_bits / 8;
 631                         bit_offset  = bit_offset + (size_bits % 8);
 632                 } else {
 633                         size_t entry_size = get_type_size_bytes(base_irtype);
 634                         if(misalign > 0 || bit_offset > 0)
 635                                 offset += entry_alignment - misalign;
 636
 637                         base           = offset;
 638                         bits_remainder = 0;
 639                         offset        += entry_size;
 640                         bit_offset     = 0;
 641                 }
 642
 643                 if(entry_alignment > align_all) {
 644                         if(entry_alignment % align_all != 0) {
 645                                 panic("uneven alignments not supported yet");
 646                         }
 647                         align_all = entry_alignment;
 648                 }
 649
 650                 set_entity_offset(entity, base);
 651                 set_entity_offset_bits_remainder(entity,
 652                                                  (unsigned char) bits_remainder);
 653                 //add_struct_member(irtype, entity);
 654                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 655                 assert(entry->v.entity == NULL);
 656                 entry->v.entity         = entity;
 657         }
 658
 659         size_t misalign = offset % align_all;
 660         if(misalign > 0 || bit_offset > 0) {
 661                 offset += align_all - misalign;
 662         }
 663
 664         if(outer_offset != NULL) {
 665                 *outer_offset = offset;
 666                 *outer_align  = align_all;
 667         } else {
 668                 set_type_alignment_bytes(irtype, align_all);
 669                 set_type_size_bytes(irtype, offset);
 670                 set_type_state(irtype, layout_fixed);
 671         }
 672
 673         return irtype;
 674 }
 675
 676 static ir_type *create_union_type(compound_type_t *type, ir_type *irtype,
 677                                   size_t *outer_offset, size_t *outer_align)
 678 {
 679         declaration_t *declaration = type->declaration;
 680         if(declaration->v.irtype != NULL) {
 681                 return declaration->v.irtype;
 682         }
 683
 684         size_t align_all = 1;
 685         size_t offset    = 0;
 686         size_t size      = 0;
 687
 688         if(irtype == NULL) {
 689                 symbol_t      *symbol      = declaration->symbol;
 690                 ident         *id;
 691                 if(symbol != NULL) {
 692                         id = unique_ident(symbol->string);
 693                 } else {
 694                         id = unique_ident("__anonymous_union");
 695                 }
 696                 dbg_info *dbgi = get_dbg_info(&type->type.source_position);
 697
 698                 irtype = new_d_type_union(id, dbgi);
 699
 700                 declaration->v.irtype = irtype;
 701                 type->type.firm_type  = irtype;
 702         } else {
 703                 offset    = *outer_offset;
 704                 align_all = *outer_align;
 705         }
 706
 707         type->type.firm_type = irtype;
 708
 709         declaration_t *entry = declaration->scope.declarations;
 710         for( ; entry != NULL; entry = entry->next) {
 711                 if(entry->namespc != NAMESPACE_NORMAL)
 712                         continue;
 713
 714                 symbol_t *symbol        = entry->symbol;
 715                 type_t   *entry_type    = skip_typeref(entry->type);
 716                 ir_type  *entry_ir_type = get_ir_type(entry_type);
 717
 718                 ident *ident;
 719                 if(symbol != NULL) {
 720                         ident = new_id_from_str(entry->symbol->string);
 721                 } else {
 722                         size_t offs = offset;
 723                         if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
 724                                 create_struct_type(&entry_type->compound, irtype, &offs,
 725                                                    &align_all);
 726                                 continue;
 727                         } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
 728                                 create_union_type(&entry_type->compound, irtype, &offs,
 729                                                   &align_all);
 730                                 continue;
 731                         } else {
 732                                 panic("anonymous union member must be struct or union");
 733                         }
 734                         size_t entry_size = offs - offset;
 735                         if(entry_size > size) {
 736                                 size = entry_size;
 737                         }
 738                         ident = unique_ident("anon");
 739                 }
 740
 741                 size_t entry_size      = get_type_size_bytes(entry_ir_type);
 742                 size_t entry_alignment = get_type_alignment_bytes(entry_ir_type);
 743
 744                 dbg_info  *const dbgi   = get_dbg_info(&entry->source_position);
 745                 ir_entity *const entity = new_d_entity(irtype, ident, entry_ir_type,
 746                                                        dbgi);
 747                 //add_union_member(irtype, entity);
 748                 set_entity_offset(entity, 0);
 749                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 750                 assert(entry->v.entity == NULL);
 751                 entry->v.entity         = entity;
 752
 753                 if(entry_size > size) {
 754                         size = entry_size;
 755                 }
 756                 if(entry_alignment > align_all) {
 757                         if(entry_alignment % align_all != 0) {
 758                                 panic("Uneven alignments not supported yet");
 759                         }
 760                         align_all = entry_alignment;
 761                 }
 762         }
 763
 764         if(outer_offset != NULL) {
 765                 assert(*outer_offset == offset);
 766
 767                 size_t misalign = offset % align_all;
 768                 if (misalign != 0)
 769                         size += align_all - misalign;
 770                 *outer_offset += size;
 771
 772                 if(align_all > *outer_align) {
 773                         if(align_all % *outer_align != 0) {
 774                                 panic("uneven alignments not supported yet");
 775                         }
 776                         *outer_align = align_all;
 777                 }
 778         } else {
 779                 set_type_alignment_bytes(irtype, align_all);
 780                 set_type_size_bytes(irtype, size);
 781                 set_type_state(irtype, layout_fixed);
 782                 declaration->v.irtype = irtype;
 783         }
 784
 785         return irtype;
 786 }
 787
 788 static ir_node *expression_to_firm(const expression_t *expression);
 789 static inline ir_mode *get_ir_mode(type_t *type);
 790
 791 static ir_type *create_enum_type(enum_type_t *const type)
 792 {
 793         type->type.firm_type = ir_type_int;
 794
 795         ir_mode *const mode    = mode_int;
 796         tarval  *const one     = get_mode_one(mode);
 797         tarval  *      tv_next = get_tarval_null(mode);
 798
 799         declaration_t *declaration = type->declaration->next;
 800         for (; declaration != NULL; declaration = declaration->next) {
 801                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 802                         break;
 803
 804                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 805
 806                 expression_t *const init = declaration->init.enum_value;
 807                 if (init != NULL) {
 808                         ir_node *const cnst = expression_to_firm(init);
 809                         if (!is_Const(cnst)) {
 810                                 panic("couldn't fold constant");
 811                         }
 812                         tv_next = get_Const_tarval(cnst);
 813                 }
 814                 declaration->v.enum_val = tv_next;
 815                 tv_next = tarval_add(tv_next, one);
 816         }
 817
 818         return ir_type_int;
 819 }
 820
 821 static ir_type *get_ir_type(type_t *type)
 822 {
 823         assert(type != NULL);
 824
 825         type = skip_typeref(type);
 826
 827         if(type->base.firm_type != NULL) {
 828                 assert(type->base.firm_type != INVALID_TYPE);
 829                 return type->base.firm_type;
 830         }
 831
 832         ir_type *firm_type = NULL;
 833         switch(type->kind) {
 834         case TYPE_ERROR:
 835                 panic("error type occured");
 836         case TYPE_ATOMIC:
 837                 firm_type = create_atomic_type(&type->atomic);
 838                 break;
 839         case TYPE_FUNCTION:
 840                 firm_type = create_method_type(&type->function);
 841                 break;
 842         case TYPE_POINTER:
 843                 firm_type = create_pointer_type(&type->pointer);
 844                 break;
 845         case TYPE_ARRAY:
 846                 firm_type = create_array_type(&type->array);
 847                 break;
 848         case TYPE_COMPOUND_STRUCT:
 849                 firm_type = create_struct_type(&type->compound, NULL, NULL, NULL);
 850                 break;
 851         case TYPE_COMPOUND_UNION:
 852                 firm_type = create_union_type(&type->compound, NULL, NULL, NULL);
 853                 break;
 854         case TYPE_ENUM:
 855                 firm_type = create_enum_type(&type->enumt);
 856                 break;
 857         case TYPE_BUILTIN:
 858                 firm_type = get_ir_type(type->builtin.real_type);
 859                 break;
 860         case TYPE_BITFIELD:
 861                 firm_type = create_bitfield_type(&type->bitfield);
 862                 break;
 863
 864         case TYPE_TYPEOF:
 865         case TYPE_TYPEDEF:
 866         case TYPE_INVALID:
 867                 break;
 868         }
 869         if(firm_type == NULL)
 870                 panic("unknown type found");
 871
 872         type->base.firm_type = firm_type;
 873         return firm_type;
 874 }
 875
 876 static inline ir_mode *get_ir_mode(type_t *type)
 877 {
 878         ir_type *irtype = get_ir_type(type);
 879
 880         /* firm doesn't report a mode for arrays somehow... */
 881         if(is_Array_type(irtype)) {
 882                 return mode_P_data;
 883         }
 884
 885         ir_mode *mode = get_type_mode(irtype);
 886         assert(mode != NULL);
 887         return mode;
 888 }
 889
 890 static ident *predef_idents[rts_max];
 891
 892 /** Names of the runtime functions. */
 893 static const struct {
 894         int        id;           /**< the rts id */
 895         int        n_res;        /**< number of return values */
 896         const char *name;        /**< the name of the rts function */
 897         int        n_params;     /**< number of parameters */
 898         unsigned   flags;        /**< language flags */
 899 } rts_data[] = {
 900         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 901         { rts_abort,      0, "abort",        0, _C89 },
 902         { rts_abs,        1, "abs",          1, _C89 },
 903         { rts_labs,       1, "labs",         1, _C89 },
 904         { rts_llabs,      1, "llabs",        1, _C99 },
 905         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 906
 907         { rts_fabs,       1, "fabs",         1, _C89 },
 908         { rts_sqrt,       1, "sqrt",         1, _C89 },
 909         { rts_cbrt,       1, "cbrt",         1, _C99 },
 910         { rts_exp,        1, "exp",          1, _C89 },
 911         { rts_exp2,       1, "exp2",         1, _C89 },
 912         { rts_exp10,      1, "exp10",        1, _GNUC },
 913         { rts_log,        1, "log",          1, _C89 },
 914         { rts_log2,       1, "log2",         1, _C89 },
 915         { rts_log10,      1, "log10",        1, _C89 },
 916         { rts_pow,        1, "pow",          2, _C89 },
 917         { rts_sin,        1, "sin",          1, _C89 },
 918         { rts_cos,        1, "cos",          1, _C89 },
 919         { rts_tan,        1, "tan",          1, _C89 },
 920         { rts_asin,       1, "asin",         1, _C89 },
 921         { rts_acos,       1, "acos",         1, _C89 },
 922         { rts_atan,       1, "atan",         1, _C89 },
 923         { rts_sinh,       1, "sinh",         1, _C89 },
 924         { rts_cosh,       1, "cosh",         1, _C89 },
 925         { rts_tanh,       1, "tanh",         1, _C89 },
 926
 927         { rts_fabsf,      1, "fabsf",        1, _C99 },
 928         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 929         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 930         { rts_expf,       1, "expf",         1, _C99 },
 931         { rts_exp2f,      1, "exp2f",        1, _C99 },
 932         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 933         { rts_logf,       1, "logf",         1, _C99 },
 934         { rts_log2f,      1, "log2f",        1, _C99 },
 935         { rts_log10f,     1, "log10f",       1, _C99 },
 936         { rts_powf,       1, "powf",         2, _C99 },
 937         { rts_sinf,       1, "sinf",         1, _C99 },
 938         { rts_cosf,       1, "cosf",         1, _C99 },
 939         { rts_tanf,       1, "tanf",         1, _C99 },
 940         { rts_asinf,      1, "asinf",        1, _C99 },
 941         { rts_acosf,      1, "acosf",        1, _C99 },
 942         { rts_atanf,      1, "atanf",        1, _C99 },
 943         { rts_sinhf,      1, "sinhf",        1, _C99 },
 944         { rts_coshf,      1, "coshf",        1, _C99 },
 945         { rts_tanhf,      1, "tanhf",        1, _C99 },
 946
 947         { rts_fabsl,      1, "fabsl",        1, _C99 },
 948         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 949         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 950         { rts_expl,       1, "expl",         1, _C99 },
 951         { rts_exp2l,      1, "exp2l",        1, _C99 },
 952         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 953         { rts_logl,       1, "logl",         1, _C99 },
 954         { rts_log2l,      1, "log2l",        1, _C99 },
 955         { rts_log10l,     1, "log10l",       1, _C99 },
 956         { rts_powl,       1, "powl",         2, _C99 },
 957         { rts_sinl,       1, "sinl",         1, _C99 },
 958         { rts_cosl,       1, "cosl",         1, _C99 },
 959         { rts_tanl,       1, "tanl",         1, _C99 },
 960         { rts_asinl,      1, "asinl",        1, _C99 },
 961         { rts_acosl,      1, "acosl",        1, _C99 },
 962         { rts_atanl,      1, "atanl",        1, _C99 },
 963         { rts_sinhl,      1, "sinhl",        1, _C99 },
 964         { rts_coshl,      1, "coshl",        1, _C99 },
 965         { rts_tanhl,      1, "tanhl",        1, _C99 },
 966
 967         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 968         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 969         { rts_strcmp,     1, "strcmp",       2, _C89 },
 970         { rts_strncmp,    1, "strncmp",      3, _C89 }
 971 };
 972
 973 static ir_entity* get_function_entity(declaration_t *declaration)
 974 {
 975         if(declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
 976                 return declaration->v.entity;
 977         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
 978
 979         symbol_t *symbol = declaration->symbol;
 980         ident    *id     = new_id_from_str(symbol->string);
 981
 982         ir_type  *global_type    = get_glob_type();
 983         ir_type  *ir_type_method = get_ir_type(declaration->type);
 984         assert(is_Method_type(ir_type_method));
 985
 986         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
 987         ir_entity *const entity = new_d_entity(global_type, id, ir_type_method, dbgi);
 988         set_entity_ld_ident(entity, id);
 989         if(declaration->storage_class == STORAGE_CLASS_STATIC
 990                         || declaration->is_inline) {
 991                 set_entity_visibility(entity, visibility_local);
 992         } else if(declaration->init.statement != NULL) {
 993                 set_entity_visibility(entity, visibility_external_visible);
 994         } else {
 995                 set_entity_visibility(entity, visibility_external_allocated);
 996
 997                 /* We should check for file scope here, but as long as we compile C only
 998                    this is not needed. */
 999                 int    n_params = get_method_n_params(ir_type_method);
1000                 int    n_res    = get_method_n_ress(ir_type_method);
1001                 int    i;
1002
1003                 if (n_params == 0 && n_res == 0 && id == predef_idents[rts_abort]) {
1004                         /* found abort(), store for later */
1005                         //abort_ent = ent;
1006                         //abort_tp  = ftype;
1007                 } else {
1008                         if (! firm_opt.freestanding) {
1009                                 /* check for a known runtime function */
1010                                 for (i = 0; i < rts_max; ++i) {
1011                                         /* ignore those rts functions not necessary needed for current mode */
1012                                         if ((c_mode & rts_data[i].flags) == 0)
1013                                                 continue;
1014                                         if (n_params == rts_data[i].n_params && n_res == rts_data[i].n_res &&
1015                                                 id == predef_idents[rts_data[i].id])
1016                                                 rts_entities[rts_data[i].id] = entity;
1017                                 }
1018                         }
1019                 }
1020         }
1021         set_entity_allocation(entity, allocation_static);
1022
1023         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1024         declaration->v.entity         = entity;
1025
1026         return entity;
1027 }
1028
1029 static ir_node *const_to_firm(const const_expression_t *cnst)
1030 {
1031         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1032         ir_mode  *mode = get_ir_mode(cnst->base.type);
1033
1034         char    buf[128];
1035         tarval *tv;
1036         size_t  len;
1037         if(mode_is_float(mode)) {
1038                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1039         } else {
1040                 if(mode_is_signed(mode)) {
1041                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1042                 } else {
1043                         len = snprintf(buf, sizeof(buf), "%llu",
1044                                        (unsigned long long) cnst->v.int_value);
1045                 }
1046                 tv = new_tarval_from_str(buf, len, mode);
1047         }
1048
1049         return new_d_Const(dbgi, mode, tv);
1050 }
1051
1052 static ir_node *char_const_to_firm(const const_expression_t *cnst)
1053 {
1054         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1055         ir_mode  *mode = get_ir_mode(cnst->base.type);
1056
1057         long long int v = 0;
1058         for (size_t i = 0; i < cnst->v.chars.size; ++i) {
1059                 v = (v << 8) | ((unsigned char)cnst->v.chars.begin[i]);
1060         }
1061         char    buf[128];
1062         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1063         tarval *tv = new_tarval_from_str(buf, len, mode);
1064
1065         return new_d_Const(dbgi, mode, tv);
1066 }
1067
1068 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1069                                 ir_entity *entity)
1070 {
1071         assert(entity != NULL);
1072         union symconst_symbol sym;
1073         sym.entity_p = entity;
1074         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1075 }
1076
1077 static ir_node *string_to_firm(const source_position_t *const src_pos,
1078                                const char *const id_prefix,
1079                                const string_t *const value)
1080 {
1081         ir_type  *const global_type = get_glob_type();
1082         dbg_info *const dbgi        = get_dbg_info(src_pos);
1083         ir_type  *const type        = new_d_type_array(unique_ident("strtype"), 1,
1084                                                        ir_type_const_char, dbgi);
1085
1086         ident     *const id     = unique_ident(id_prefix);
1087         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1088         set_entity_ld_ident(entity, id);
1089         set_entity_variability(entity, variability_constant);
1090         set_entity_allocation(entity, allocation_static);
1091
1092         ir_type *const elem_type = ir_type_const_char;
1093         ir_mode *const mode      = get_type_mode(elem_type);
1094
1095         const char* const string = value->begin;
1096         const size_t      slen   = value->size;
1097
1098         set_array_lower_bound_int(type, 0, 0);
1099         set_array_upper_bound_int(type, 0, slen);
1100         set_type_size_bytes(type, slen);
1101         set_type_state(type, layout_fixed);
1102
1103         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1104         for(size_t i = 0; i < slen; ++i) {
1105                 tvs[i] = new_tarval_from_long(string[i], mode);
1106         }
1107
1108         set_array_entity_values(entity, tvs, slen);
1109         free(tvs);
1110
1111         return create_symconst(dbgi, mode_P_data, entity);
1112 }
1113
1114 static ir_node *string_literal_to_firm(
1115                 const string_literal_expression_t* literal)
1116 {
1117         return string_to_firm(&literal->base.source_position, "Lstr",
1118                               &literal->value);
1119 }
1120
1121 static ir_node *wide_string_literal_to_firm(
1122         const wide_string_literal_expression_t* const literal)
1123 {
1124         ir_type *const global_type = get_glob_type();
1125         ir_type *const elem_type   = ir_type_wchar_t;
1126         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1127         ir_type *const type        = new_d_type_array(unique_ident("strtype"), 1,
1128                                                     elem_type, dbgi);
1129
1130         ident     *const id     = unique_ident("Lstr");
1131         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1132         set_entity_ld_ident(entity, id);
1133         set_entity_variability(entity, variability_constant);
1134         set_entity_allocation(entity, allocation_static);
1135
1136         ir_mode *const mode      = get_type_mode(elem_type);
1137
1138         const wchar_rep_t *const string = literal->value.begin;
1139         const size_t             slen   = literal->value.size;
1140
1141         set_array_lower_bound_int(type, 0, 0);
1142         set_array_upper_bound_int(type, 0, slen);
1143         set_type_size_bytes(type, slen);
1144         set_type_state(type, layout_fixed);
1145
1146         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1147         for(size_t i = 0; i < slen; ++i) {
1148                 tvs[i] = new_tarval_from_long(string[i], mode);
1149         }
1150
1151         set_array_entity_values(entity, tvs, slen);
1152         free(tvs);
1153
1154         return create_symconst(dbgi, mode_P_data, entity);
1155 }
1156
1157 static ir_node *deref_address(ir_type *const irtype, ir_node *const addr,
1158                               dbg_info *const dbgi)
1159 {
1160         if (is_compound_type(irtype) ||
1161                         is_Method_type(irtype)   ||
1162                         is_Array_type(irtype)) {
1163                 return addr;
1164         }
1165
1166         ir_mode *const mode     = get_type_mode(irtype);
1167         ir_node *const memory   = get_store();
1168         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1169         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1170         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1171         set_store(load_mem);
1172         return load_res;
1173 }
1174
1175 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1176 {
1177         ir_mode *mode = get_irn_mode(node);
1178
1179         if(!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1180                 return node;
1181         if(!mode_is_float(mode))
1182                 return node;
1183
1184         /* check if there is already a Conv */
1185         if (get_irn_op(node) == op_Conv) {
1186                 /* convert it into a strict Conv */
1187                 set_Conv_strict(node, 1);
1188                 return node;
1189         }
1190
1191         /* otherwise create a new one */
1192         return new_d_strictConv(dbgi, node, mode);
1193 }
1194
1195 static ir_node *get_global_var_address(dbg_info *const dbgi,
1196                                        const declaration_t *const decl)
1197 {
1198         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1199
1200         ir_entity *const entity = decl->v.entity;
1201         switch ((storage_class_tag_t)decl->storage_class) {
1202                 case STORAGE_CLASS_THREAD:
1203                 case STORAGE_CLASS_THREAD_EXTERN:
1204                 case STORAGE_CLASS_THREAD_STATIC: {
1205                         ir_node *const no_mem = new_NoMem();
1206                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1207                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1208                 }
1209
1210                 default:
1211                         return create_symconst(dbgi, mode_P_data, entity);
1212         }
1213 }
1214
1215 /* Returns the correct base address depending on whether it is a parameter or a
1216  * normal local variable */
1217 static ir_node *get_local_frame(ir_entity *const ent)
1218 {
1219         ir_graph      *const irg   = current_ir_graph;
1220         const ir_type *const owner = get_entity_owner(ent);
1221         if (owner == get_irg_frame_type(irg)) {
1222                 return get_irg_frame(irg);
1223         } else {
1224                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1225                 return get_irg_value_param_base(irg);
1226         }
1227 }
1228
1229 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1230 {
1231         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1232         declaration_t *declaration = ref->declaration;
1233         type_t        *type        = skip_typeref(declaration->type);
1234
1235         switch((declaration_kind_t) declaration->declaration_kind) {
1236         case DECLARATION_KIND_UNKNOWN:
1237                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
1238                         break;
1239                 }
1240                 get_ir_type(type);
1241                 /* FALLTHROUGH */
1242
1243         case DECLARATION_KIND_ENUM_ENTRY: {
1244                 ir_mode *const mode = get_ir_mode(type);
1245                 return new_Const(mode, declaration->v.enum_val);
1246         }
1247
1248         case DECLARATION_KIND_LOCAL_VARIABLE: {
1249                 ir_mode *const mode = get_ir_mode(type);
1250                 return get_value(declaration->v.value_number, mode);
1251         }
1252         case DECLARATION_KIND_FUNCTION: {
1253                 ir_mode *const mode = get_ir_mode(type);
1254                 return create_symconst(dbgi, mode, declaration->v.entity);
1255         }
1256         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1257                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1258                 ir_type *const irtype = get_entity_type(declaration->v.entity);
1259                 return deref_address(irtype, addr, dbgi);
1260         }
1261
1262         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1263                 ir_entity *entity = declaration->v.entity;
1264                 ir_node   *frame  = get_local_frame(entity);
1265                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1266                 ir_type   *irtype = get_entity_type(entity);
1267                 return deref_address(irtype, sel, dbgi);
1268         }
1269
1270         case DECLARATION_KIND_COMPOUND_MEMBER:
1271         case DECLARATION_KIND_LABEL_BLOCK:
1272                 panic("not implemented reference type");
1273         }
1274
1275         panic("reference to declaration with unknown type found");
1276 }
1277
1278 static ir_node *reference_addr(const reference_expression_t *ref)
1279 {
1280         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1281         declaration_t *declaration = ref->declaration;
1282
1283         switch((declaration_kind_t) declaration->declaration_kind) {
1284         case DECLARATION_KIND_UNKNOWN:
1285                 break;
1286         case DECLARATION_KIND_LOCAL_VARIABLE:
1287                 panic("local variable without entity has no address");
1288         case DECLARATION_KIND_FUNCTION: {
1289                 type_t *const  type = skip_typeref(ref->base.type);
1290                 ir_mode *const mode = get_ir_mode(type);
1291                 return create_symconst(dbgi, mode, declaration->v.entity);
1292         }
1293         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1294                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1295                 return addr;
1296         }
1297         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1298                 ir_entity *entity = declaration->v.entity;
1299                 ir_node   *frame  = get_local_frame(entity);
1300                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1301
1302                 return sel;
1303         }
1304
1305         case DECLARATION_KIND_ENUM_ENTRY:
1306                 panic("trying to reference enum entry");
1307
1308         case DECLARATION_KIND_COMPOUND_MEMBER:
1309         case DECLARATION_KIND_LABEL_BLOCK:
1310                 panic("not implemented reference type");
1311         }
1312
1313         panic("reference to declaration with unknown type found");
1314 }
1315
1316 static ir_node *process_builtin_call(const call_expression_t *call)
1317 {
1318         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1319
1320         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1321         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1322
1323         type_t *type = skip_typeref(builtin->base.type);
1324         assert(is_type_pointer(type));
1325
1326         type_t   *function_type = skip_typeref(type->pointer.points_to);
1327         symbol_t *symbol        = builtin->symbol;
1328
1329         switch(symbol->ID) {
1330         case T___builtin_alloca: {
1331                 if(call->arguments == NULL || call->arguments->next != NULL) {
1332                         panic("invalid number of parameters on __builtin_alloca");
1333                 }
1334                 expression_t *argument = call->arguments->expression;
1335                 ir_node      *size     = expression_to_firm(argument);
1336
1337                 ir_node *store  = get_store();
1338                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1339                                               stack_alloc);
1340                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1341                 set_store(proj_m);
1342                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1343
1344                 return res;
1345         }
1346         case T___builtin_nan:
1347         case T___builtin_nanf:
1348         case T___builtin_nand: {
1349                 /* Ignore string for now... */
1350                 assert(is_type_function(function_type));
1351                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1352                 tarval  *tv   = get_mode_NAN(mode);
1353                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1354                 return res;
1355         }
1356         case T___builtin_va_end:
1357                 return NULL;
1358         default:
1359                 panic("Unsupported builtin found\n");
1360         }
1361 }
1362
1363 static ir_node *call_expression_to_firm(const call_expression_t *call)
1364 {
1365         assert(get_cur_block() != NULL);
1366
1367         expression_t *function = call->function;
1368         if(function->kind == EXPR_BUILTIN_SYMBOL) {
1369                 return process_builtin_call(call);
1370         }
1371         ir_node *callee = expression_to_firm(function);
1372
1373         type_t *type = skip_typeref(function->base.type);
1374         assert(is_type_pointer(type));
1375         pointer_type_t *pointer_type = &type->pointer;
1376         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1377         assert(is_type_function(points_to));
1378         function_type_t *function_type = &points_to->function;
1379
1380         int              n_parameters = 0;
1381         call_argument_t *argument     = call->arguments;
1382         for( ; argument != NULL; argument = argument->next) {
1383                 ++n_parameters;
1384         }
1385
1386         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1387
1388         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1389         ir_type *new_method_type = NULL;
1390         if(function_type->variadic || function_type->unspecified_parameters) {
1391                 /* we need to construct a new method type matching the call
1392                  * arguments... */
1393                 int n_res       = get_method_n_ress(ir_method_type);
1394                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1395                 new_method_type = new_d_type_method(unique_ident("calltype"),
1396                                                   n_parameters, n_res, dbgi);
1397                 set_method_calling_convention(new_method_type,
1398                                get_method_calling_convention(ir_method_type));
1399                 set_method_additional_properties(new_method_type,
1400                                get_method_additional_properties(ir_method_type));
1401
1402                 for(int i = 0; i < n_res; ++i) {
1403                         set_method_res_type(new_method_type, i,
1404                                             get_method_res_type(ir_method_type, i));
1405                 }
1406         }
1407         ir_node *in[n_parameters];
1408
1409         argument = call->arguments;
1410         int n = 0;
1411         for( ; argument != NULL; argument = argument->next) {
1412                 expression_t *expression = argument->expression;
1413                 ir_node      *arg_node   = expression_to_firm(expression);
1414
1415                 arg_node = do_strict_conv(dbgi, arg_node);
1416
1417                 in[n] = arg_node;
1418                 if(new_method_type != NULL) {
1419                         ir_type *irtype = get_ir_type(expression->base.type);
1420                         set_method_param_type(new_method_type, n, irtype);
1421                 }
1422
1423                 n++;
1424         }
1425         assert(n == n_parameters);
1426
1427         if(new_method_type != NULL)
1428                 ir_method_type = new_method_type;
1429
1430         ir_node  *store = get_store();
1431         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1432                                      ir_method_type);
1433         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1434         set_store(mem);
1435
1436         type_t  *return_type = skip_typeref(function_type->return_type);
1437         ir_node *result      = NULL;
1438
1439         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1440                 ir_mode *mode;
1441                 if(is_type_scalar(return_type)) {
1442                         mode = get_ir_mode(return_type);
1443                 } else {
1444                         mode = mode_P_data;
1445                 }
1446                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1447                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1448         }
1449
1450         return result;
1451 }
1452
1453 static void statement_to_firm(statement_t *statement);
1454 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1455
1456 static ir_node *expression_to_addr(const expression_t *expression);
1457 static void create_condition_evaluation(const expression_t *expression,
1458                                         ir_node *true_block,
1459                                         ir_node *false_block);
1460
1461 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1462                          ir_node *value)
1463 {
1464         value = do_strict_conv(dbgi, value);
1465
1466         ir_node *memory = get_store();
1467
1468         if(is_type_scalar(type)) {
1469                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1470                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1471                 set_store(store_mem);
1472         } else {
1473                 ir_type *irtype    = get_ir_type(type);
1474                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1475                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1476                 set_store(copyb_mem);
1477         }
1478 }
1479
1480 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1481 {
1482         tarval *all_one   = get_mode_all_one(mode);
1483         int     mode_size = get_mode_size_bits(mode);
1484
1485         assert(offset >= 0 && size >= 0);
1486         assert(offset + size <= mode_size);
1487         if(size == mode_size) {
1488                 return all_one;
1489         }
1490
1491         long    shiftr    = get_mode_size_bits(mode) - size;
1492         long    shiftl    = offset;
1493         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1494         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1495         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1496         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1497
1498         return mask1;
1499 }
1500
1501 static void bitfield_store_to_firm(const unary_expression_t *expression,
1502                                    ir_node *value)
1503 {
1504         expression_t *select = expression->value;
1505         assert(select->kind == EXPR_SELECT);
1506         type_t       *type   = select->base.type;
1507         assert(type->kind == TYPE_BITFIELD);
1508         ir_mode      *mode   = get_ir_mode(type->bitfield.base);
1509         ir_node      *addr   = expression_to_addr(select);
1510
1511         assert(get_irn_mode(value) == mode);
1512
1513         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1514
1515         /* kill upper bits of value and shift to right position */
1516         ir_entity *entity       = select->select.compound_entry->v.entity;
1517         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1518         ir_type   *entity_type  = get_entity_type(entity);
1519         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1520
1521         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1522         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1523         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1524         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1525         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1526         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1527
1528         /* load current value */
1529         ir_node  *mem             = get_store();
1530         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1531         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1532         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1533         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1534         tarval   *inv_mask        = tarval_not(shift_mask);
1535         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1536         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1537
1538         /* construct new value and store */
1539         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1540         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1541         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1542         set_store(store_mem);
1543 }
1544
1545 static void set_value_for_expression(const expression_t *expression,
1546                                      ir_node *value)
1547 {
1548         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1549         value          = do_strict_conv(dbgi, value);
1550
1551         if(expression->kind == EXPR_REFERENCE) {
1552                 const reference_expression_t *ref = &expression->reference;
1553
1554                 declaration_t *declaration = ref->declaration;
1555                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1556                 if(declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1557                         set_value(declaration->v.value_number, value);
1558                         return;
1559                 }
1560         }
1561
1562         if(expression->kind == EXPR_UNARY_BITFIELD_EXTRACT) {
1563                 bitfield_store_to_firm(&expression->unary, value);
1564                 return;
1565         }
1566
1567         ir_node *addr = expression_to_addr(expression);
1568         type_t  *type = skip_typeref(expression->base.type);
1569         assign_value(dbgi, addr, type, value);
1570 }
1571
1572 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1573 {
1574         ir_mode *value_mode = get_irn_mode(value);
1575
1576         if (value_mode == dest_mode || is_Bad(value))
1577                 return value;
1578
1579         if(dest_mode == mode_b) {
1580                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1581                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1582                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1583                 return proj;
1584         }
1585
1586         return new_d_Conv(dbgi, value, dest_mode);
1587 }
1588
1589 static ir_node *create_incdec(const unary_expression_t *expression)
1590 {
1591         dbg_info     *dbgi  = get_dbg_info(&expression->base.source_position);
1592         type_t       *type  = skip_typeref(expression->base.type);
1593         ir_mode      *mode  = get_ir_mode(type);
1594         expression_t *value = expression->value;
1595
1596         ir_node *value_node = expression_to_firm(value);
1597
1598         ir_node *offset;
1599         if(is_type_pointer(type)) {
1600                 pointer_type_t *pointer_type = &type->pointer;
1601                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
1602                 offset = new_Const_long(mode_int, elem_size);
1603         } else {
1604                 assert(is_type_arithmetic(type));
1605                 offset = new_Const(mode, get_mode_one(mode));
1606         }
1607
1608         switch(expression->base.kind) {
1609         case EXPR_UNARY_POSTFIX_INCREMENT: {
1610                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1611                 set_value_for_expression(value, new_value);
1612                 return value_node;
1613         }
1614         case EXPR_UNARY_POSTFIX_DECREMENT: {
1615                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1616                 set_value_for_expression(value, new_value);
1617                 return value_node;
1618         }
1619         case EXPR_UNARY_PREFIX_INCREMENT: {
1620                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1621                 set_value_for_expression(value, new_value);
1622                 return new_value;
1623         }
1624         case EXPR_UNARY_PREFIX_DECREMENT: {
1625                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1626                 set_value_for_expression(value, new_value);
1627                 return new_value;
1628         }
1629         default:
1630                 panic("no incdec expr in create_incdec");
1631                 return NULL;
1632         }
1633 }
1634
1635 static bool is_local_variable(expression_t *expression)
1636 {
1637         if (expression->kind != EXPR_REFERENCE)
1638                 return false;
1639         reference_expression_t *ref_expr    = &expression->reference;
1640         declaration_t          *declaration = ref_expr->declaration;
1641         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1642 }
1643
1644 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1645 {
1646         switch(kind) {
1647         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1648         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1649         case EXPR_BINARY_NOTEQUAL:
1650                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1651         case EXPR_BINARY_ISLESS:
1652         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1653         case EXPR_BINARY_ISLESSEQUAL:
1654         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1655         case EXPR_BINARY_ISGREATER:
1656         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1657         case EXPR_BINARY_ISGREATEREQUAL:
1658         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1659         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1660
1661         default:
1662                 break;
1663         }
1664         panic("trying to get pn_Cmp from non-comparison binexpr type");
1665 }
1666
1667 /**
1668  * Handle the assume optimizer hint: check if a Confirm
1669  * node can be created.
1670  *
1671  * @param dbi    debug info
1672  * @param expr   the IL assume expression
1673  *
1674  * we support here only some simple cases:
1675  *  - var rel const
1676  *  - const rel val
1677  *  - var rel var
1678  */
1679 static ir_node *handle_assume_compare(dbg_info *dbi,
1680                                       const binary_expression_t *expression)
1681 {
1682         expression_t  *op1 = expression->left;
1683         expression_t  *op2 = expression->right;
1684         declaration_t *var2, *var = NULL;
1685         ir_node       *res = NULL;
1686         pn_Cmp         cmp_val;
1687
1688         cmp_val = get_pnc(expression->base.kind, op1->base.type);
1689
1690         if (is_local_variable(op1) && is_local_variable(op2)) {
1691         var  = op1->reference.declaration;
1692             var2 = op2->reference.declaration;
1693
1694                 type_t  *const type = skip_typeref(var->type);
1695                 ir_mode *const mode = get_ir_mode(type);
1696
1697                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1698                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1699
1700                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1701                 set_value(var2->v.value_number, res);
1702
1703                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1704                 set_value(var->v.value_number, res);
1705
1706                 return res;
1707         }
1708
1709         expression_t *con;
1710         if (is_local_variable(op1) && is_constant_expression(op2)) {
1711                 var = op1->reference.declaration;
1712                 con = op2;
1713         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
1714                 cmp_val = get_inversed_pnc(cmp_val);
1715                 var = op2->reference.declaration;
1716                 con = op1;
1717         }
1718
1719         if (var != NULL) {
1720                 type_t  *const type = skip_typeref(var->type);
1721                 ir_mode *const mode = get_ir_mode(type);
1722
1723                 res = get_value(var->v.value_number, mode);
1724                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
1725                 set_value(var->v.value_number, res);
1726         }
1727         return res;
1728 }
1729
1730 /**
1731  * Handle the assume optimizer hint.
1732  *
1733  * @param dbi    debug info
1734  * @param expr   the IL assume expression
1735  */
1736 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
1737         switch(expression->kind) {
1738         case EXPR_BINARY_EQUAL:
1739         case EXPR_BINARY_NOTEQUAL:
1740         case EXPR_BINARY_LESS:
1741         case EXPR_BINARY_LESSEQUAL:
1742         case EXPR_BINARY_GREATER:
1743         case EXPR_BINARY_GREATEREQUAL:
1744                 return handle_assume_compare(dbi, &expression->binary);
1745         default:
1746                 return NULL;
1747         }
1748 }
1749
1750 static ir_node *bitfield_extract_to_firm(const unary_expression_t *expression)
1751 {
1752         expression_t *select = expression->value;
1753         assert(select->kind == EXPR_SELECT);
1754
1755         type_t   *type     = select->base.type;
1756         assert(type->kind == TYPE_BITFIELD);
1757         ir_mode  *mode     = get_ir_mode(type->bitfield.base);
1758         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1759         ir_node  *addr     = expression_to_addr(select);
1760         ir_node  *mem      = get_store();
1761         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1762         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1763         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1764
1765         load_res           = create_conv(dbgi, load_res, mode_int);
1766
1767         set_store(load_mem);
1768
1769         /* kill upper bits */
1770         ir_entity *entity       = select->select.compound_entry->v.entity;
1771         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1772         ir_type   *entity_type  = get_entity_type(entity);
1773         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1774         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1775         assert(shift_bitsl >= 0);
1776         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1777         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1778         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1779
1780         long       shift_bitsr  = bitoffset + shift_bitsl;
1781         assert(shift_bitsr <= (long) machine_size);
1782         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1783         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1784         ir_node   *shiftr;
1785         if(mode_is_signed(mode)) {
1786                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1787         } else {
1788                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1789         }
1790
1791         return create_conv(dbgi, shiftr, mode);
1792 }
1793
1794 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1795 {
1796         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1797         type_t   *type = skip_typeref(expression->base.type);
1798
1799         if(expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
1800                 return expression_to_addr(expression->value);
1801
1802         const expression_t *value = expression->value;
1803
1804         switch(expression->base.kind) {
1805         case EXPR_UNARY_NEGATE: {
1806                 ir_node *value_node = expression_to_firm(value);
1807                 ir_mode *mode = get_ir_mode(type);
1808                 return new_d_Minus(dbgi, value_node, mode);
1809         }
1810         case EXPR_UNARY_PLUS:
1811                 return expression_to_firm(value);
1812         case EXPR_UNARY_BITWISE_NEGATE: {
1813                 ir_node *value_node = expression_to_firm(value);
1814                 ir_mode *mode = get_ir_mode(type);
1815                 return new_d_Not(dbgi, value_node, mode);
1816         }
1817         case EXPR_UNARY_NOT: {
1818                 ir_node *value_node = expression_to_firm(value);
1819                 ir_mode *mode = get_ir_mode(type);
1820                 if(get_irn_mode(value_node) != mode_b) {
1821                         value_node = create_conv(dbgi, value_node, mode_b);
1822                 }
1823                 value_node = new_d_Not(dbgi, value_node, mode_b);
1824                 if(mode != mode_b) {
1825                         value_node = create_conv(dbgi, value_node, mode);
1826                 }
1827                 return value_node;
1828         }
1829         case EXPR_UNARY_DEREFERENCE: {
1830                 ir_node *value_node = expression_to_firm(value);
1831                 type_t  *value_type = skip_typeref(value->base.type);
1832                 ir_type *irtype     = get_ir_type(value_type);
1833                 assert(is_Pointer_type(irtype));
1834                 ir_type *points_to  = get_pointer_points_to_type(irtype);
1835                 return deref_address(points_to, value_node, dbgi);
1836         }
1837         case EXPR_UNARY_POSTFIX_INCREMENT:
1838         case EXPR_UNARY_POSTFIX_DECREMENT:
1839         case EXPR_UNARY_PREFIX_INCREMENT:
1840         case EXPR_UNARY_PREFIX_DECREMENT:
1841                 return create_incdec(expression);
1842         case EXPR_UNARY_CAST: {
1843                 ir_node *value_node = expression_to_firm(value);
1844                 if(is_type_scalar(type)) {
1845                         ir_mode *mode = get_ir_mode(type);
1846                         ir_node *node = create_conv(dbgi, value_node, mode);
1847                         node = do_strict_conv(dbgi, node);
1848                         return node;
1849                 } else {
1850                         return value_node;
1851                 }
1852         }
1853         case EXPR_UNARY_CAST_IMPLICIT: {
1854                 ir_node *value_node = expression_to_firm(value);
1855                 if(is_type_scalar(type)) {
1856                         ir_mode *mode = get_ir_mode(type);
1857                         return create_conv(dbgi, value_node, mode);
1858                 } else {
1859                         return value_node;
1860                 }
1861         }
1862         case EXPR_UNARY_ASSUME:
1863                 if(firm_opt.confirm)
1864                         return handle_assume(dbgi, value);
1865                 else
1866                         return NULL;
1867         case EXPR_UNARY_BITFIELD_EXTRACT:
1868                 return bitfield_extract_to_firm(expression);
1869
1870         default:
1871                 break;
1872         }
1873         panic("invalid UNEXPR type found");
1874 }
1875
1876 static ir_node *create_lazy_op(const binary_expression_t *expression)
1877 {
1878         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1879         type_t   *type = expression->base.type;
1880         ir_mode  *mode = get_ir_mode(type);
1881
1882         if(is_constant_expression(expression->left)) {
1883                 long val = fold_constant(expression->left);
1884                 expression_kind_t ekind = expression->base.kind;
1885                 if((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
1886                                 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
1887                         return expression_to_firm(expression->right);
1888                 } else {
1889                         assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
1890                                         || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
1891                         return new_Const(mode, get_mode_one(mode));
1892                 }
1893         }
1894
1895         ir_node *cur_block = get_cur_block();
1896
1897         ir_node *one_block = new_immBlock();
1898         ir_node *one       = new_Const(mode, get_mode_one(mode));
1899         ir_node *jmp_one   = new_d_Jmp(dbgi);
1900
1901         ir_node *zero_block = new_immBlock();
1902         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1903         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1904
1905         set_cur_block(cur_block);
1906         create_condition_evaluation((const expression_t*) expression,
1907                                     one_block, zero_block);
1908         mature_immBlock(one_block);
1909         mature_immBlock(zero_block);
1910
1911         ir_node *common_block = new_immBlock();
1912         add_immBlock_pred(common_block, jmp_one);
1913         add_immBlock_pred(common_block, jmp_zero);
1914         mature_immBlock(common_block);
1915
1916         ir_node *in[2] = { one, zero };
1917         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1918
1919         return val;
1920 }
1921
1922 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1923                                             ir_node *right, ir_mode *mode);
1924
1925 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1926                                         create_arithmetic_func func)
1927 {
1928         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
1929         ir_node  *left  = expression_to_firm(expression->left);
1930         ir_node  *right = expression_to_firm(expression->right);
1931         type_t   *type  = expression->right->base.type;
1932         /* be careful with the modes, because in arithmetic assign nodes only
1933          * the right operand has the mode of the arithmetic already */
1934         ir_mode  *mode  = get_ir_mode(type);
1935         left            = create_conv(dbgi, left, mode);
1936         ir_node  *res   = func(dbgi, left, right, mode);
1937
1938         return res;
1939 }
1940
1941 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1942                                    ir_node  *      integer,
1943                                    type_t   *const type,
1944                                    dbg_info *const dbgi,
1945                                    const create_arithmetic_func func)
1946 {
1947         pointer_type_t *const pointer_type = &type->pointer;
1948         type_t         *const points_to    = pointer_type->points_to;
1949         const unsigned        elem_size    = get_type_size(points_to);
1950
1951         assert(elem_size >= 1);
1952         if (elem_size > 1) {
1953                 integer             = create_conv(dbgi, integer, mode_int);
1954                 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
1955                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_int);
1956                 integer = mul;
1957         }
1958
1959         ir_mode *const mode = get_ir_mode(type);
1960         return func(dbgi, pointer, integer, mode);
1961 }
1962
1963 static ir_node *create_arithmetic_assign_binop(
1964                 const binary_expression_t *expression, create_arithmetic_func func)
1965 {
1966         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
1967         type_t   *const type = skip_typeref(expression->base.type);
1968         ir_node  *value;
1969
1970         if (is_type_pointer(type)) {
1971                 ir_node *const pointer = expression_to_firm(expression->left);
1972                 ir_node *      integer = expression_to_firm(expression->right);
1973                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1974         } else {
1975                 value = create_arithmetic_binop(expression, func);
1976         }
1977
1978         ir_mode *const mode = get_ir_mode(type);
1979         value = create_conv(dbgi, value, mode);
1980         set_value_for_expression(expression->left, value);
1981
1982         return value;
1983 }
1984
1985 static ir_node *create_add(const binary_expression_t *expression)
1986 {
1987         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
1988         ir_node  *left  = expression_to_firm(expression->left);
1989         ir_node  *right = expression_to_firm(expression->right);
1990         type_t   *type  = expression->base.type;
1991
1992         expression_t *expr_left  = expression->left;
1993         expression_t *expr_right = expression->right;
1994         type_t       *type_left  = skip_typeref(expr_left->base.type);
1995         type_t       *type_right = skip_typeref(expr_right->base.type);
1996
1997         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1998                 ir_mode *const mode = get_ir_mode(type);
1999                 return new_d_Add(dbgi, left, right, mode);
2000         }
2001
2002         if (is_type_pointer(type_left)) {
2003                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
2004         } else {
2005                 assert(is_type_pointer(type_right));
2006                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
2007         }
2008 }
2009
2010 static ir_node *create_sub(const binary_expression_t *expression)
2011 {
2012         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2013         expression_t *const expr_left  = expression->left;
2014         expression_t *const expr_right = expression->right;
2015         ir_node      *const left       = expression_to_firm(expr_left);
2016         ir_node      *const right      = expression_to_firm(expr_right);
2017         type_t       *const type       = expression->base.type;
2018         type_t       *const type_left  = skip_typeref(expr_left->base.type);
2019         type_t       *const type_right = skip_typeref(expr_right->base.type);
2020
2021         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2022                 ir_mode *const mode = get_ir_mode(type);
2023                 return new_d_Sub(dbgi, left, right, mode);
2024         } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2025                 const pointer_type_t *const ptr_type = &type_left->pointer;
2026                 const unsigned elem_size             = get_type_size(ptr_type->points_to);
2027                 ir_mode *const mode   = get_ir_mode(type);
2028                 ir_node *const sub    = new_d_Sub(dbgi, left, right, mode);
2029                 ir_node *const cnst   = new_Const_long(mode_int, (long)elem_size);
2030                 ir_node *const no_mem = new_NoMem();
2031                 ir_node *const div    = new_d_Div(dbgi, no_mem, sub, cnst, mode,
2032                                                   op_pin_state_floats);
2033                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2034         }
2035
2036         assert(is_type_pointer(type_left));
2037         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
2038 }
2039
2040 static ir_node *create_shift(const binary_expression_t *expression)
2041 {
2042         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2043         ir_node  *left  = expression_to_firm(expression->left);
2044         ir_node  *right = expression_to_firm(expression->right);
2045         type_t   *type  = expression->base.type;
2046         ir_mode  *mode  = get_ir_mode(type);
2047
2048         /* firm always wants the shift count to be unsigned */
2049         right = create_conv(dbgi, right, mode_uint);
2050
2051         ir_node *res;
2052
2053         switch(expression->base.kind) {
2054         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2055         case EXPR_BINARY_SHIFTLEFT:
2056                 res = new_d_Shl(dbgi, left, right, mode);
2057                 break;
2058         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2059         case EXPR_BINARY_SHIFTRIGHT: {
2060                  expression_t *expr_left = expression->left;
2061                  type_t       *type_left = skip_typeref(expr_left->base.type);
2062
2063                  if(is_type_signed(type_left)) {
2064                         res = new_d_Shrs(dbgi, left, right, mode);
2065                  } else {
2066                          res = new_d_Shr(dbgi, left, right, mode);
2067                  }
2068                  break;
2069         }
2070         default:
2071                 panic("create shift op called for non-shift op");
2072         }
2073
2074         return res;
2075 }
2076
2077
2078 static ir_node *create_divmod(const binary_expression_t *expression)
2079 {
2080         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2081         ir_node  *left  = expression_to_firm(expression->left);
2082         ir_node  *right = expression_to_firm(expression->right);
2083         ir_node  *pin   = new_Pin(new_NoMem());
2084         /* be careful with the modes, because in arithmetic assign nodes only
2085          * the right operand has the mode of the arithmetic already */
2086         type_t   *type  = expression->right->base.type;
2087         ir_mode  *mode  = get_ir_mode(type);
2088         left            = create_conv(dbgi, left, mode);
2089         ir_node  *op;
2090         ir_node  *res;
2091
2092         switch (expression->base.kind) {
2093         case EXPR_BINARY_DIV:
2094         case EXPR_BINARY_DIV_ASSIGN:
2095                 if(mode_is_float(mode)) {
2096                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2097                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2098                 } else {
2099                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2100                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2101                 }
2102                 break;
2103
2104         case EXPR_BINARY_MOD:
2105         case EXPR_BINARY_MOD_ASSIGN:
2106                 assert(!mode_is_float(mode));
2107                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
2108                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2109                 break;
2110
2111         default: panic("unexpected binary expression type in create_divmod()");
2112         }
2113
2114         return res;
2115 }
2116
2117 static ir_node *create_arithmetic_assign_divmod(
2118                 const binary_expression_t *expression)
2119 {
2120         ir_node  *      value = create_divmod(expression);
2121         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2122         type_t   *const type  = expression->base.type;
2123         ir_mode  *const mode  = get_ir_mode(type);
2124
2125         assert(type->kind != TYPE_POINTER);
2126
2127         value = create_conv(dbgi, value, mode);
2128         set_value_for_expression(expression->left, value);
2129
2130         return value;
2131 }
2132
2133 static ir_node *create_arithmetic_assign_shift(
2134                 const binary_expression_t *expression)
2135 {
2136         ir_node  *      value = create_shift(expression);
2137         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2138         type_t   *const type  = expression->base.type;
2139         ir_mode  *const mode  = get_ir_mode(type);
2140
2141         value = create_conv(dbgi, value, mode);
2142         set_value_for_expression(expression->left, value);
2143
2144         return value;
2145 }
2146
2147 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2148 {
2149         expression_kind_t kind = expression->base.kind;
2150
2151         switch(kind) {
2152         case EXPR_BINARY_EQUAL:
2153         case EXPR_BINARY_NOTEQUAL:
2154         case EXPR_BINARY_LESS:
2155         case EXPR_BINARY_LESSEQUAL:
2156         case EXPR_BINARY_GREATER:
2157         case EXPR_BINARY_GREATEREQUAL:
2158         case EXPR_BINARY_ISGREATER:
2159         case EXPR_BINARY_ISGREATEREQUAL:
2160         case EXPR_BINARY_ISLESS:
2161         case EXPR_BINARY_ISLESSEQUAL:
2162         case EXPR_BINARY_ISLESSGREATER:
2163         case EXPR_BINARY_ISUNORDERED: {
2164                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2165                 ir_node *left  = expression_to_firm(expression->left);
2166                 ir_node *right = expression_to_firm(expression->right);
2167                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2168                 long     pnc   = get_pnc(kind, expression->left->base.type);
2169                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2170                 return proj;
2171         }
2172         case EXPR_BINARY_ASSIGN: {
2173                 ir_node *right = expression_to_firm(expression->right);
2174                 set_value_for_expression(expression->left, right);
2175
2176                 return right;
2177         }
2178         case EXPR_BINARY_ADD:
2179                 return create_add(expression);
2180         case EXPR_BINARY_SUB:
2181                 return create_sub(expression);
2182         case EXPR_BINARY_MUL:
2183                 return create_arithmetic_binop(expression, new_d_Mul);
2184         case EXPR_BINARY_BITWISE_AND:
2185                 return create_arithmetic_binop(expression, new_d_And);
2186         case EXPR_BINARY_BITWISE_OR:
2187                 return create_arithmetic_binop(expression, new_d_Or);
2188         case EXPR_BINARY_BITWISE_XOR:
2189                 return create_arithmetic_binop(expression, new_d_Eor);
2190         case EXPR_BINARY_SHIFTLEFT:
2191         case EXPR_BINARY_SHIFTRIGHT:
2192                 return create_shift(expression);
2193         case EXPR_BINARY_DIV:
2194         case EXPR_BINARY_MOD:
2195                 return create_divmod(expression);
2196         case EXPR_BINARY_LOGICAL_AND:
2197         case EXPR_BINARY_LOGICAL_OR:
2198                 return create_lazy_op(expression);
2199         case EXPR_BINARY_COMMA:
2200                 expression_to_firm(expression->left);
2201                 return expression_to_firm(expression->right);
2202         case EXPR_BINARY_ADD_ASSIGN:
2203                 return create_arithmetic_assign_binop(expression, new_d_Add);
2204         case EXPR_BINARY_SUB_ASSIGN:
2205                 return create_arithmetic_assign_binop(expression, new_d_Sub);
2206         case EXPR_BINARY_MUL_ASSIGN:
2207                 return create_arithmetic_assign_binop(expression, new_d_Mul);
2208         case EXPR_BINARY_MOD_ASSIGN:
2209         case EXPR_BINARY_DIV_ASSIGN:
2210                 return create_arithmetic_assign_divmod(expression);
2211         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2212                 return create_arithmetic_assign_binop(expression, new_d_And);
2213         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2214                 return create_arithmetic_assign_binop(expression, new_d_Or);
2215         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2216                 return create_arithmetic_assign_binop(expression, new_d_Eor);
2217         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2218         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2219                 return create_arithmetic_assign_shift(expression);
2220         case EXPR_BINARY_BUILTIN_EXPECT:
2221                 return expression_to_firm(expression->left);
2222         default:
2223                 panic("TODO binexpr type");
2224         }
2225 }
2226
2227 static ir_node *array_access_addr(const array_access_expression_t *expression)
2228 {
2229         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2230         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2231         ir_node  *offset    = expression_to_firm(expression->index);
2232         offset              = create_conv(dbgi, offset, mode_uint);
2233
2234         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2235         assert(is_type_pointer(ref_type));
2236         pointer_type_t *pointer_type = &ref_type->pointer;
2237
2238         unsigned elem_size       = get_type_size(pointer_type->points_to);
2239         ir_node *elem_size_const = new_Const_long(mode_uint, elem_size);
2240         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2241                                              mode_uint);
2242         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2243
2244         return result;
2245 }
2246
2247 static ir_node *array_access_to_firm(
2248                 const array_access_expression_t *expression)
2249 {
2250         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2251         ir_node  *addr   = array_access_addr(expression);
2252         type_t   *type   = revert_automatic_type_conversion(
2253                         (const expression_t*) expression);
2254         type             = skip_typeref(type);
2255         ir_type  *irtype = get_ir_type(type);
2256
2257         return deref_address(irtype, addr, dbgi);
2258 }
2259
2260 static long get_offsetof_offset(const offsetof_expression_t *expression)
2261 {
2262         type_t *orig_type = expression->type;
2263         long    offset    = 0;
2264
2265         designator_t *designator = expression->designator;
2266         for( ; designator != NULL; designator = designator->next) {
2267                 type_t *type = skip_typeref(orig_type);
2268                 /* be sure the type is constructed */
2269                 (void) get_ir_type(type);
2270
2271                 if(designator->symbol != NULL) {
2272                         assert(is_type_compound(type));
2273                         symbol_t *symbol = designator->symbol;
2274
2275                         declaration_t *declaration = type->compound.declaration;
2276                         declaration_t *iter        = declaration->scope.declarations;
2277                         for( ; iter != NULL; iter = iter->next) {
2278                                 if(iter->symbol == symbol) {
2279                                         break;
2280                                 }
2281                         }
2282                         assert(iter != NULL);
2283
2284                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2285                         offset += get_entity_offset(iter->v.entity);
2286
2287                         orig_type = iter->type;
2288                 } else {
2289                         expression_t *array_index = designator->array_index;
2290                         assert(designator->array_index != NULL);
2291                         assert(is_type_array(type));
2292                         assert(is_type_valid(array_index->base.type));
2293
2294                         long index         = fold_constant(array_index);
2295                         ir_type *arr_type  = get_ir_type(type);
2296                         ir_type *elem_type = get_array_element_type(arr_type);
2297                         long     elem_size = get_type_size_bytes(elem_type);
2298
2299                         offset += index * elem_size;
2300
2301                         orig_type = type->array.element_type;
2302                 }
2303         }
2304
2305         return offset;
2306 }
2307
2308 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2309 {
2310         ir_mode  *mode   = get_ir_mode(expression->base.type);
2311         long      offset = get_offsetof_offset(expression);
2312         tarval   *tv     = new_tarval_from_long(offset, mode);
2313         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2314
2315         return new_d_Const(dbgi, mode, tv);
2316 }
2317
2318 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2319                                      ir_entity *entity, type_t *type);
2320
2321 static ir_node *compound_literal_to_firm(
2322                 const compound_literal_expression_t *expression)
2323 {
2324         type_t *type = expression->type;
2325
2326         /* create an entity on the stack */
2327         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2328
2329         ident     *const id     = unique_ident("CompLit");
2330         ir_type   *const irtype = get_ir_type(type);
2331         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2332         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2333         set_entity_ld_ident(entity, id);
2334
2335         set_entity_variability(entity, variability_uninitialized);
2336
2337         /* create initialisation code TODO */
2338         initializer_t *initializer = expression->initializer;
2339         create_local_initializer(initializer, dbgi, entity, type);
2340
2341         /* create a sel for the compound literal address */
2342         ir_node   *frame = get_local_frame(entity);
2343         ir_node   *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2344         return sel;
2345 }
2346
2347 /**
2348  * Transform a sizeof expression into Firm code.
2349  */
2350 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2351 {
2352         type_t *type = expression->type;
2353         if(type == NULL) {
2354                 type = expression->tp_expression->base.type;
2355                 assert(type != NULL);
2356         }
2357
2358         ir_mode *const mode = get_ir_mode(expression->base.type);
2359         symconst_symbol sym;
2360         sym.type_p = get_ir_type(type);
2361         return new_SymConst(mode, sym, symconst_type_size);
2362 }
2363
2364 /**
2365  * Transform an alignof expression into Firm code.
2366  */
2367 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2368 {
2369         type_t *type = expression->type;
2370         if(type == NULL) {
2371                 /* beware: if expression is a variable reference, return the
2372                    alignment of the variable. */
2373                 const expression_t *tp_expression = expression->tp_expression;
2374                 const declaration_t *declaration = expr_is_variable(tp_expression);
2375                 if (declaration != NULL) {
2376                         /* TODO: get the alignment of this variable. */
2377                 }
2378                 type = tp_expression->base.type;
2379                 assert(type != NULL);
2380         }
2381
2382         ir_mode *const mode = get_ir_mode(expression->base.type);
2383         symconst_symbol sym;
2384         sym.type_p = get_ir_type(type);
2385         return new_SymConst(mode, sym, symconst_type_align);
2386 }
2387
2388 static void init_ir_types(void);
2389 long fold_constant(const expression_t *expression)
2390 {
2391         init_ir_types();
2392
2393         assert(is_constant_expression(expression));
2394
2395         ir_graph *old_current_ir_graph = current_ir_graph;
2396         if(current_ir_graph == NULL) {
2397                 current_ir_graph = get_const_code_irg();
2398         }
2399
2400         ir_node *cnst = expression_to_firm(expression);
2401         current_ir_graph = old_current_ir_graph;
2402
2403         if(!is_Const(cnst)) {
2404                 panic("couldn't fold constant\n");
2405         }
2406
2407         tarval *tv = get_Const_tarval(cnst);
2408         if(!tarval_is_long(tv)) {
2409                 panic("result of constant folding is not integer\n");
2410         }
2411
2412         return get_tarval_long(tv);
2413 }
2414
2415 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2416 {
2417         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2418
2419         /* first try to fold a constant condition */
2420         if(is_constant_expression(expression->condition)) {
2421                 long val = fold_constant(expression->condition);
2422                 if(val) {
2423                         return expression_to_firm(expression->true_expression);
2424                 } else {
2425                         return expression_to_firm(expression->false_expression);
2426                 }
2427         }
2428
2429         ir_node *cur_block   = get_cur_block();
2430
2431         /* create the true block */
2432         ir_node *true_block  = new_immBlock();
2433
2434         ir_node *true_val = expression_to_firm(expression->true_expression);
2435         ir_node *true_jmp = new_Jmp();
2436
2437         /* create the false block */
2438         ir_node *false_block = new_immBlock();
2439
2440         ir_node *false_val = expression_to_firm(expression->false_expression);
2441         ir_node *false_jmp = new_Jmp();
2442
2443         /* create the condition evaluation */
2444         set_cur_block(cur_block);
2445         create_condition_evaluation(expression->condition, true_block, false_block);
2446         mature_immBlock(true_block);
2447         mature_immBlock(false_block);
2448
2449         /* create the common block */
2450         ir_node *common_block = new_immBlock();
2451         add_immBlock_pred(common_block, true_jmp);
2452         add_immBlock_pred(common_block, false_jmp);
2453         mature_immBlock(common_block);
2454
2455         /* TODO improve static semantics, so either both or no values are NULL */
2456         if (true_val == NULL || false_val == NULL)
2457                 return NULL;
2458
2459         ir_node *in[2] = { true_val, false_val };
2460         ir_mode *mode  = get_irn_mode(true_val);
2461         assert(get_irn_mode(false_val) == mode);
2462         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2463
2464         return val;
2465 }
2466
2467 static ir_node *select_addr(const select_expression_t *expression)
2468 {
2469         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2470
2471         ir_node *compound_addr = expression_to_firm(expression->compound);
2472
2473         declaration_t *entry = expression->compound_entry;
2474         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2475         ir_entity     *entity = entry->v.entity;
2476
2477         assert(entity != NULL);
2478
2479         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2480
2481         return sel;
2482 }
2483
2484 static ir_node *select_to_firm(const select_expression_t *expression)
2485 {
2486         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2487         ir_node  *addr   = select_addr(expression);
2488         type_t   *type   = revert_automatic_type_conversion(
2489                         (const expression_t*) expression);
2490         type             = skip_typeref(type);
2491         ir_type  *irtype = get_ir_type(type);
2492
2493         return deref_address(irtype, addr, dbgi);
2494 }
2495
2496 /* Values returned by __builtin_classify_type. */
2497 typedef enum gcc_type_class
2498 {
2499         no_type_class = -1,
2500         void_type_class,
2501         integer_type_class,
2502         char_type_class,
2503         enumeral_type_class,
2504         boolean_type_class,
2505         pointer_type_class,
2506         reference_type_class,
2507         offset_type_class,
2508         real_type_class,
2509         complex_type_class,
2510         function_type_class,
2511         method_type_class,
2512         record_type_class,
2513         union_type_class,
2514         array_type_class,
2515         string_type_class,
2516         set_type_class,
2517         file_type_class,
2518         lang_type_class
2519 } gcc_type_class;
2520
2521 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2522 {
2523         const type_t *const type = expr->type_expression->base.type;
2524
2525         gcc_type_class tc;
2526         switch (type->kind)
2527         {
2528                 case TYPE_ATOMIC: {
2529                         const atomic_type_t *const atomic_type = &type->atomic;
2530                         switch (atomic_type->akind) {
2531                                 /* should not be reached */
2532                                 case ATOMIC_TYPE_INVALID:
2533                                         tc = no_type_class;
2534                                         break;
2535
2536                                 /* gcc cannot do that */
2537                                 case ATOMIC_TYPE_VOID:
2538                                         tc = void_type_class;
2539                                         break;
2540
2541                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2542                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2543                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2544                                 case ATOMIC_TYPE_SHORT:
2545                                 case ATOMIC_TYPE_USHORT:
2546                                 case ATOMIC_TYPE_INT:
2547                                 case ATOMIC_TYPE_UINT:
2548                                 case ATOMIC_TYPE_LONG:
2549                                 case ATOMIC_TYPE_ULONG:
2550                                 case ATOMIC_TYPE_LONGLONG:
2551                                 case ATOMIC_TYPE_ULONGLONG:
2552                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2553                                         tc = integer_type_class;
2554                                         break;
2555
2556                                 case ATOMIC_TYPE_FLOAT:
2557                                 case ATOMIC_TYPE_DOUBLE:
2558                                 case ATOMIC_TYPE_LONG_DOUBLE:
2559                                         tc = real_type_class;
2560                                         break;
2561
2562 #ifdef PROVIDE_COMPLEX
2563                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
2564                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
2565                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
2566                                         tc = complex_type_class;
2567                                         break;
2568                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
2569                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
2570                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
2571                                         tc = complex_type_class;
2572                                         break;
2573 #endif
2574
2575                                 default:
2576                                         panic("Unimplemented case in classify_type_to_firm().");
2577                         }
2578                         break;
2579                 }
2580
2581                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2582                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2583                 case TYPE_POINTER:         tc = pointer_type_class; break;
2584                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
2585                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
2586
2587                 /* gcc handles this as integer */
2588                 case TYPE_ENUM:            tc = integer_type_class; break;
2589
2590                 default:
2591                         panic("Unimplemented case in classify_type_to_firm().");
2592         }
2593
2594         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2595         ir_mode  *const mode = mode_int;
2596         tarval   *const tv   = new_tarval_from_long(tc, mode);
2597         return new_d_Const(dbgi, mode, tv);
2598 }
2599
2600 static ir_node *function_name_to_firm(
2601                 const string_literal_expression_t *const expr)
2602 {
2603         if (current_function_name == NULL) {
2604                 const source_position_t *const src_pos = &expr->base.source_position;
2605                 const char *const name = current_function_decl->symbol->string;
2606                 const string_t string = { name, strlen(name) + 1 };
2607                 current_function_name = string_to_firm(src_pos, "__func__", &string);
2608         }
2609
2610         return current_function_name;
2611 }
2612
2613 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2614 {
2615         statement_t *statement = expr->statement;
2616
2617         assert(statement->kind == STATEMENT_COMPOUND);
2618         return compound_statement_to_firm(&statement->compound);
2619 }
2620
2621 static ir_node *va_start_expression_to_firm(
2622         const va_start_expression_t *const expr)
2623 {
2624         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2625         int        const n           = get_method_n_params(method_type) - 1;
2626         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2627         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2628         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2629         ir_node   *const no_mem      = new_NoMem();
2630         ir_node   *const arg_sel     =
2631                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2632
2633         size_t     const parm_size   = get_type_size(expr->parameter->type);
2634         ir_node   *const cnst        = new_Const_long(mode_uint, parm_size);
2635         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2636         set_value_for_expression(expr->ap, add);
2637
2638         return NULL;
2639 }
2640
2641 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2642 {
2643         ir_type  *const irtype = get_ir_type(expr->base.type);
2644         ir_node  *const ap     = expression_to_firm(expr->ap);
2645         dbg_info *const dbgi   = get_dbg_info(&expr->base.source_position);
2646         ir_node  *const res    = deref_address(irtype, ap, dbgi);
2647
2648         size_t    const parm_size = get_type_size(expr->base.type);
2649         ir_node  *const cnst      = new_Const_long(mode_uint, parm_size);
2650         ir_node  *const add       = new_d_Add(dbgi, ap, cnst, mode_P_data);
2651         set_value_for_expression(expr->ap, add);
2652
2653         return res;
2654 }
2655
2656 static ir_node *dereference_addr(const unary_expression_t *const expression)
2657 {
2658         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2659         return expression_to_firm(expression->value);
2660 }
2661
2662 static ir_node *expression_to_addr(const expression_t *expression)
2663 {
2664         switch(expression->kind) {
2665         case EXPR_REFERENCE:
2666                 return reference_addr(&expression->reference);
2667         case EXPR_ARRAY_ACCESS:
2668                 return array_access_addr(&expression->array_access);
2669         case EXPR_SELECT:
2670                 return select_addr(&expression->select);
2671         case EXPR_CALL:
2672                 return call_expression_to_firm(&expression->call);
2673         case EXPR_UNARY_DEREFERENCE: {
2674                 return dereference_addr(&expression->unary);
2675         }
2676         default:
2677                 break;
2678         }
2679         panic("trying to get address of non-lvalue");
2680 }
2681
2682 static ir_node *builtin_constant_to_firm(
2683                 const builtin_constant_expression_t *expression)
2684 {
2685         ir_mode *mode = get_ir_mode(expression->base.type);
2686         long     v;
2687
2688         if (is_constant_expression(expression->value)) {
2689                 v = 1;
2690         } else {
2691                 v = 0;
2692         }
2693         return new_Const_long(mode, v);
2694 }
2695
2696 static ir_node *builtin_prefetch_to_firm(
2697                 const builtin_prefetch_expression_t *expression)
2698 {
2699         ir_node *adr = expression_to_firm(expression->adr);
2700         /* no Firm support for prefetch yet */
2701         (void) adr;
2702         return NULL;
2703 }
2704
2705 static ir_node *_expression_to_firm(const expression_t *expression)
2706 {
2707         switch(expression->kind) {
2708         case EXPR_CHAR_CONST:
2709                 return char_const_to_firm(&expression->conste);
2710         case EXPR_CONST:
2711                 return const_to_firm(&expression->conste);
2712         case EXPR_STRING_LITERAL:
2713                 return string_literal_to_firm(&expression->string);
2714         case EXPR_WIDE_STRING_LITERAL:
2715                 return wide_string_literal_to_firm(&expression->wide_string);
2716         case EXPR_REFERENCE:
2717                 return reference_expression_to_firm(&expression->reference);
2718         case EXPR_CALL:
2719                 return call_expression_to_firm(&expression->call);
2720         EXPR_UNARY_CASES
2721                 return unary_expression_to_firm(&expression->unary);
2722         EXPR_BINARY_CASES
2723                 return binary_expression_to_firm(&expression->binary);
2724         case EXPR_ARRAY_ACCESS:
2725                 return array_access_to_firm(&expression->array_access);
2726         case EXPR_SIZEOF:
2727                 return sizeof_to_firm(&expression->typeprop);
2728         case EXPR_ALIGNOF:
2729                 return alignof_to_firm(&expression->typeprop);
2730         case EXPR_CONDITIONAL:
2731                 return conditional_to_firm(&expression->conditional);
2732         case EXPR_SELECT:
2733                 return select_to_firm(&expression->select);
2734         case EXPR_CLASSIFY_TYPE:
2735                 return classify_type_to_firm(&expression->classify_type);
2736         case EXPR_FUNCTION:
2737         case EXPR_PRETTY_FUNCTION:
2738                 return function_name_to_firm(&expression->string);
2739         case EXPR_STATEMENT:
2740                 return statement_expression_to_firm(&expression->statement);
2741         case EXPR_VA_START:
2742                 return va_start_expression_to_firm(&expression->va_starte);
2743         case EXPR_VA_ARG:
2744                 return va_arg_expression_to_firm(&expression->va_arge);
2745         case EXPR_BUILTIN_SYMBOL:
2746                 panic("unimplemented expression found");
2747         case EXPR_BUILTIN_CONSTANT_P:
2748                 return builtin_constant_to_firm(&expression->builtin_constant);
2749         case EXPR_BUILTIN_PREFETCH:
2750                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2751         case EXPR_OFFSETOF:
2752                 return offsetof_to_firm(&expression->offsetofe);
2753         case EXPR_COMPOUND_LITERAL:
2754                 return compound_literal_to_firm(&expression->compound_literal);
2755
2756         case EXPR_UNKNOWN:
2757         case EXPR_INVALID:
2758                 break;
2759         }
2760         panic("invalid expression found");
2761 }
2762
2763 static ir_node *expression_to_firm(const expression_t *expression)
2764 {
2765         ir_node *res = _expression_to_firm(expression);
2766
2767         if(res != NULL && get_irn_mode(res) == mode_b) {
2768                 ir_mode *mode = get_ir_mode(expression->base.type);
2769                 res           = create_conv(NULL, res, mode);
2770         }
2771
2772         return res;
2773 }
2774
2775 static ir_node *expression_to_modeb(const expression_t *expression)
2776 {
2777         ir_node *res = _expression_to_firm(expression);
2778         res          = create_conv(NULL, res, mode_b);
2779
2780         return res;
2781 }
2782
2783 /**
2784  * create a short-circuit expression evaluation that tries to construct
2785  * efficient control flow structures for &&, || and ! expressions
2786  */
2787 static void create_condition_evaluation(const expression_t *expression,
2788                                         ir_node *true_block,
2789                                         ir_node *false_block)
2790 {
2791         switch(expression->kind) {
2792         case EXPR_UNARY_NOT: {
2793                 const unary_expression_t *unary_expression = &expression->unary;
2794                 create_condition_evaluation(unary_expression->value, false_block,
2795                                             true_block);
2796                 return;
2797         }
2798         case EXPR_BINARY_LOGICAL_AND: {
2799                 const binary_expression_t *binary_expression = &expression->binary;
2800
2801                 ir_node *cur_block   = get_cur_block();
2802                 ir_node *extra_block = new_immBlock();
2803                 set_cur_block(cur_block);
2804                 create_condition_evaluation(binary_expression->left, extra_block,
2805                                             false_block);
2806                 mature_immBlock(extra_block);
2807                 set_cur_block(extra_block);
2808                 create_condition_evaluation(binary_expression->right, true_block,
2809                                             false_block);
2810                 return;
2811         }
2812         case EXPR_BINARY_LOGICAL_OR: {
2813                 const binary_expression_t *binary_expression = &expression->binary;
2814
2815                 ir_node *cur_block   = get_cur_block();
2816                 ir_node *extra_block = new_immBlock();
2817                 set_cur_block(cur_block);
2818                 create_condition_evaluation(binary_expression->left, true_block,
2819                                             extra_block);
2820                 mature_immBlock(extra_block);
2821                 set_cur_block(extra_block);
2822                 create_condition_evaluation(binary_expression->right, true_block,
2823                                             false_block);
2824                 return;
2825         }
2826         default:
2827                 break;
2828         }
2829
2830         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
2831         ir_node  *condition  = expression_to_modeb(expression);
2832         ir_node  *cond       = new_d_Cond(dbgi, condition);
2833         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2834         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2835
2836         /* set branch prediction info based on __builtin_expect */
2837         if(expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
2838                 long               cnst = fold_constant(expression->binary.right);
2839                 cond_jmp_predicate pred;
2840
2841                 if(cnst == 0) {
2842                         pred = COND_JMP_PRED_FALSE;
2843                 } else {
2844                         pred = COND_JMP_PRED_TRUE;
2845                 }
2846                 set_Cond_jmp_pred(cond, pred);
2847         }
2848
2849         add_immBlock_pred(true_block, true_proj);
2850         add_immBlock_pred(false_block, false_proj);
2851
2852         set_cur_block(NULL);
2853 }
2854
2855
2856
2857 static void create_declaration_entity(declaration_t *declaration,
2858                                       declaration_kind_t declaration_kind,
2859                                       ir_type *parent_type)
2860 {
2861         ident     *const id     = new_id_from_str(declaration->symbol->string);
2862         ir_type   *const irtype = get_ir_type(declaration->type);
2863         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
2864         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
2865         set_entity_ld_ident(entity, id);
2866
2867         declaration->declaration_kind = (unsigned char) declaration_kind;
2868         declaration->v.entity         = entity;
2869         set_entity_variability(entity, variability_uninitialized);
2870         if(parent_type == get_tls_type())
2871                 set_entity_allocation(entity, allocation_automatic);
2872         else if(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
2873                 set_entity_allocation(entity, allocation_static);
2874         /* TODO: visibility? */
2875 }
2876
2877
2878 typedef struct type_path_entry_t type_path_entry_t;
2879 struct type_path_entry_t {
2880         type_t           *type;
2881         ir_initializer_t *initializer;
2882         size_t            index;
2883         declaration_t    *compound_entry;
2884 };
2885
2886 typedef struct type_path_t type_path_t;
2887 struct type_path_t {
2888         type_path_entry_t *path;
2889         type_t            *top_type;
2890         bool               invalid;
2891 };
2892
2893 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
2894 {
2895         size_t len = ARR_LEN(path->path);
2896
2897         for(size_t i = 0; i < len; ++i) {
2898                 const type_path_entry_t *entry = & path->path[i];
2899
2900                 type_t *type = skip_typeref(entry->type);
2901                 if(is_type_compound(type)) {
2902                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
2903                 } else if(is_type_array(type)) {
2904                         fprintf(stderr, "[%u]", entry->index);
2905                 } else {
2906                         fprintf(stderr, "-INVALID-");
2907                 }
2908         }
2909         fprintf(stderr, "  (");
2910         print_type(path->top_type);
2911         fprintf(stderr, ")");
2912 }
2913
2914 static type_path_entry_t *get_type_path_top(const type_path_t *path)
2915 {
2916         size_t len = ARR_LEN(path->path);
2917         assert(len > 0);
2918         return & path->path[len-1];
2919 }
2920
2921 static type_path_entry_t *append_to_type_path(type_path_t *path)
2922 {
2923         size_t len = ARR_LEN(path->path);
2924         ARR_RESIZE(type_path_entry_t, path->path, len+1);
2925
2926         type_path_entry_t *result = & path->path[len];
2927         memset(result, 0, sizeof(result[0]));
2928         return result;
2929 }
2930
2931 static size_t get_compound_size(const compound_type_t *type)
2932 {
2933         declaration_t *declaration = type->declaration;
2934         declaration_t *member      = declaration->scope.declarations;
2935         size_t         size        = 0;
2936         for( ; member != NULL; member = member->next) {
2937                 ++size;
2938         }
2939         /* TODO: cache results? */
2940
2941         return size;
2942 }
2943
2944 static ir_initializer_t *get_initializer_entry(type_path_t *path)
2945 {
2946         type_t *orig_top_type = path->top_type;
2947         type_t *top_type      = skip_typeref(orig_top_type);
2948
2949         assert(is_type_compound(top_type) || is_type_array(top_type));
2950
2951         if(ARR_LEN(path->path) == 0) {
2952                 return NULL;
2953         } else {
2954                 type_path_entry_t *top         = get_type_path_top(path);
2955                 ir_initializer_t  *initializer = top->initializer;
2956                 return get_initializer_compound_value(initializer, top->index);
2957         }
2958 }
2959
2960 static void descend_into_subtype(type_path_t *path)
2961 {
2962         type_t *orig_top_type = path->top_type;
2963         type_t *top_type      = skip_typeref(orig_top_type);
2964
2965         assert(is_type_compound(top_type) || is_type_array(top_type));
2966
2967         ir_initializer_t *initializer = get_initializer_entry(path);
2968
2969         type_path_entry_t *top = append_to_type_path(path);
2970         top->type              = top_type;
2971
2972         size_t len;
2973
2974         if(is_type_compound(top_type)) {
2975                 declaration_t *declaration = top_type->compound.declaration;
2976                 declaration_t *entry       = declaration->scope.declarations;
2977
2978                 top->compound_entry = entry;
2979                 top->index          = 0;
2980                 path->top_type      = entry->type;
2981                 len                 = get_compound_size(&top_type->compound);
2982         } else {
2983                 assert(is_type_array(top_type));
2984                 assert(top_type->array.size > 0);
2985
2986                 top->index     = 0;
2987                 path->top_type = top_type->array.element_type;
2988                 len            = top_type->array.size;
2989         }
2990         if(initializer == NULL
2991                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
2992                 initializer = create_initializer_compound(len);
2993                 /* we have to set the entry at the 2nd latest path entry... */
2994                 size_t path_len = ARR_LEN(path->path);
2995                 assert(path_len >= 1);
2996                 if(path_len > 1) {
2997                         type_path_entry_t *entry        = & path->path[path_len-2];
2998                         ir_initializer_t  *tinitializer = entry->initializer;
2999                         set_initializer_compound_value(tinitializer, entry->index,
3000                                                        initializer);
3001                 }
3002         }
3003         top->initializer = initializer;
3004 }
3005
3006 static void ascend_from_subtype(type_path_t *path)
3007 {
3008         type_path_entry_t *top = get_type_path_top(path);
3009
3010         path->top_type = top->type;
3011
3012         size_t len = ARR_LEN(path->path);
3013         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3014 }
3015
3016 static void walk_designator(type_path_t *path, const designator_t *designator)
3017 {
3018         /* designators start at current object type */
3019         ARR_RESIZE(type_path_entry_t, path->path, 1);
3020
3021         for( ; designator != NULL; designator = designator->next) {
3022                 type_path_entry_t *top         = get_type_path_top(path);
3023                 type_t            *orig_type   = top->type;
3024                 type_t            *type        = skip_typeref(orig_type);
3025
3026                 if(designator->symbol != NULL) {
3027                         assert(is_type_compound(type));
3028                         size_t    index  = 0;
3029                         symbol_t *symbol = designator->symbol;
3030
3031                         declaration_t *declaration = type->compound.declaration;
3032                         declaration_t *iter        = declaration->scope.declarations;
3033                         for( ; iter != NULL; iter = iter->next, ++index) {
3034                                 if(iter->symbol == symbol) {
3035                                         break;
3036                                 }
3037                         }
3038                         assert(iter != NULL);
3039
3040                         top->type           = orig_type;
3041                         top->compound_entry = iter;
3042                         top->index          = index;
3043                         orig_type           = iter->type;
3044                 } else {
3045                         expression_t *array_index = designator->array_index;
3046                         assert(designator->array_index != NULL);
3047                         assert(is_type_array(type));
3048                         assert(is_type_valid(array_index->base.type));
3049
3050                         long index = fold_constant(array_index);
3051                         assert(index >= 0);
3052 #ifndef NDEBUG
3053                         if(type->array.size_constant == 1) {
3054                                 long array_size = type->array.size;
3055                                 assert(index < array_size);
3056                         }
3057 #endif
3058
3059                         top->type  = orig_type;
3060                         top->index = (size_t) index;
3061                         orig_type  = type->array.element_type;
3062                 }
3063                 path->top_type = orig_type;
3064
3065                 if(designator->next != NULL) {
3066                         descend_into_subtype(path);
3067                 }
3068         }
3069
3070         path->invalid  = false;
3071 }
3072
3073 static void advance_current_object(type_path_t *path)
3074 {
3075         if(path->invalid) {
3076                 /* TODO: handle this... */
3077                 panic("invalid initializer in ast2firm (excessive elements)");
3078                 return;
3079         }
3080
3081         type_path_entry_t *top = get_type_path_top(path);
3082
3083         type_t *type = skip_typeref(top->type);
3084         if(is_type_union(type)) {
3085                 top->compound_entry = NULL;
3086         } else if(is_type_struct(type)) {
3087                 declaration_t *entry = top->compound_entry;
3088
3089                 top->index++;
3090                 entry               = entry->next;
3091                 top->compound_entry = entry;
3092                 if(entry != NULL) {
3093                         path->top_type = entry->type;
3094                         return;
3095                 }
3096         } else {
3097                 assert(is_type_array(type));
3098
3099                 top->index++;
3100                 if(!type->array.size_constant || top->index < type->array.size) {
3101                         return;
3102                 }
3103         }
3104
3105         /* we're past the last member of the current sub-aggregate, try if we
3106          * can ascend in the type hierarchy and continue with another subobject */
3107         size_t len = ARR_LEN(path->path);
3108
3109         if(len > 1) {
3110                 ascend_from_subtype(path);
3111                 advance_current_object(path);
3112         } else {
3113                 path->invalid = true;
3114         }
3115 }
3116
3117
3118 static ir_initializer_t *create_ir_initializer(
3119                 const initializer_t *initializer, type_t *type);
3120
3121 static ir_initializer_t *create_ir_initializer_value(
3122                 const initializer_value_t *initializer)
3123 {
3124         ir_node *value = expression_to_firm(initializer->value);
3125         return create_initializer_const(value);
3126 }
3127
3128 static ir_initializer_t *create_ir_initializer_list(
3129                 const initializer_list_t *initializer, type_t *type)
3130 {
3131         type_path_t path;
3132         memset(&path, 0, sizeof(path));
3133         path.top_type = type;
3134         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3135
3136         descend_into_subtype(&path);
3137
3138         for(size_t i = 0; i < initializer->len; ++i) {
3139                 const initializer_t *sub_initializer = initializer->initializers[i];
3140
3141                 if(sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3142                         walk_designator(&path, sub_initializer->designator.designator);
3143                         continue;
3144                 }
3145
3146                 if(sub_initializer->kind == INITIALIZER_VALUE) {
3147                         /* we might have to descend into types until we're at a scalar
3148                          * type */
3149                         while(true) {
3150                                 type_t *orig_top_type = path.top_type;
3151                                 type_t *top_type      = skip_typeref(orig_top_type);
3152
3153                                 if(is_type_scalar(top_type))
3154                                         break;
3155                                 descend_into_subtype(&path);
3156                         }
3157                 }
3158
3159                 ir_initializer_t *sub_irinitializer
3160                         = create_ir_initializer(sub_initializer, path.top_type);
3161
3162                 size_t path_len = ARR_LEN(path.path);
3163                 assert(path_len >= 1);
3164                 type_path_entry_t *entry        = & path.path[path_len-1];
3165                 ir_initializer_t  *tinitializer = entry->initializer;
3166                 set_initializer_compound_value(tinitializer, entry->index,
3167                                                sub_irinitializer);
3168
3169                 advance_current_object(&path);
3170         }
3171
3172         assert(ARR_LEN(path.path) >= 1);
3173         ir_initializer_t *result = path.path[0].initializer;
3174         DEL_ARR_F(path.path);
3175
3176         return result;
3177 }
3178
3179 static ir_initializer_t *create_ir_initializer_string(
3180                 const initializer_string_t *initializer)
3181 {
3182         size_t            len           = initializer->string.size;
3183         ir_initializer_t *irinitializer = create_initializer_compound(len);
3184
3185         const char *string = initializer->string.begin;
3186         ir_mode    *mode   = get_type_mode(ir_type_const_char);
3187
3188         for(size_t i = 0; i < len; ++i) {
3189                 tarval           *tv = new_tarval_from_long(string[i], mode);
3190                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3191
3192                 set_initializer_compound_value(irinitializer, i, char_initializer);
3193         }
3194
3195         return irinitializer;
3196 }
3197
3198 static ir_initializer_t *create_ir_initializer_wide_string(
3199                 const initializer_wide_string_t *initializer)
3200 {
3201         size_t            len           = initializer->string.size;
3202         ir_initializer_t *irinitializer = create_initializer_compound(len);
3203
3204         const wchar_rep_t *string = initializer->string.begin;
3205         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3206
3207         for(size_t i = 0; i < len; ++i) {
3208                 tarval *tv = new_tarval_from_long(string[i], mode);
3209                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3210
3211                 set_initializer_compound_value(irinitializer, i, char_initializer);
3212         }
3213
3214         return irinitializer;
3215 }
3216
3217 static ir_initializer_t *create_ir_initializer(
3218                 const initializer_t *initializer, type_t *type)
3219 {
3220         switch(initializer->kind) {
3221                 case INITIALIZER_STRING:
3222                         return create_ir_initializer_string(&initializer->string);
3223
3224                 case INITIALIZER_WIDE_STRING:
3225                         return create_ir_initializer_wide_string(&initializer->wide_string);
3226
3227                 case INITIALIZER_LIST:
3228                         return create_ir_initializer_list(&initializer->list, type);
3229
3230                 case INITIALIZER_VALUE:
3231                         return create_ir_initializer_value(&initializer->value);
3232
3233                 case INITIALIZER_DESIGNATOR:
3234                         panic("unexpected designator initializer found");
3235         }
3236         panic("unknown initializer");
3237 }
3238
3239
3240 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3241                                      ir_entity *entity, type_t *type)
3242 {
3243         ir_node *memory = get_store();
3244         ir_node *nomem  = new_NoMem();
3245         ir_node *frame  = get_irg_frame(current_ir_graph);
3246         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3247
3248         if(initializer->kind == INITIALIZER_VALUE) {
3249                 initializer_value_t *initializer_value = &initializer->value;
3250
3251                 ir_node *value = expression_to_firm(initializer_value->value);
3252                 type = skip_typeref(type);
3253                 assign_value(dbgi, addr, type, value);
3254                 return;
3255         }
3256
3257         /* create a "template" entity which is copied to the entity on the stack */
3258         ident     *const id          = unique_ident("initializer");
3259         ir_type   *const irtype      = get_ir_type(type);
3260         ir_type   *const global_type = get_glob_type();
3261         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3262         set_entity_ld_ident(init_entity, id);
3263
3264         set_entity_variability(init_entity, variability_initialized);
3265         set_entity_visibility(init_entity, visibility_local);
3266         set_entity_allocation(init_entity, allocation_static);
3267
3268         ir_graph *const old_current_ir_graph = current_ir_graph;
3269         current_ir_graph = get_const_code_irg();
3270
3271         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3272         set_entity_initializer(init_entity, irinitializer);
3273
3274         assert(current_ir_graph == get_const_code_irg());
3275         current_ir_graph = old_current_ir_graph;
3276
3277         ir_node *const src_addr  = create_symconst(dbgi, mode_P_data, init_entity);
3278         ir_node *const copyb     = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3279
3280         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3281         set_store(copyb_mem);
3282 }
3283
3284 static void create_initializer_local_variable_entity(declaration_t *declaration)
3285 {
3286         initializer_t *initializer = declaration->init.initializer;
3287         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3288         ir_entity     *entity      = declaration->v.entity;
3289         type_t        *type        = declaration->type;
3290         create_local_initializer(initializer, dbgi, entity, type);
3291 }
3292
3293 static void create_declaration_initializer(declaration_t *declaration)
3294 {
3295         initializer_t *initializer = declaration->init.initializer;
3296         if(initializer == NULL)
3297                 return;
3298
3299         declaration_kind_t declaration_kind
3300                 = (declaration_kind_t) declaration->declaration_kind;
3301         if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3302                 create_initializer_local_variable_entity(declaration);
3303                 return;
3304         }
3305
3306         if(initializer->kind == INITIALIZER_VALUE) {
3307                 initializer_value_t *initializer_value = &initializer->value;
3308
3309                 ir_node *value = expression_to_firm(initializer_value->value);
3310
3311                 if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3312                         set_value(declaration->v.value_number, value);
3313                 } else {
3314                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3315
3316                         ir_entity *entity = declaration->v.entity;
3317
3318                         set_entity_variability(entity, variability_initialized);
3319                         set_atomic_ent_value(entity, value);
3320                 }
3321         } else {
3322                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3323                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3324
3325                 ir_entity        *entity        = declaration->v.entity;
3326                 ir_initializer_t *irinitializer
3327                         = create_ir_initializer(initializer, declaration->type);
3328
3329                 set_entity_variability(entity, variability_initialized);
3330                 set_entity_initializer(entity, irinitializer);
3331         }
3332 }
3333
3334 /**
3335  * Creates a Firm local variable from a declaration.
3336  */
3337 static void create_local_variable(declaration_t *declaration)
3338 {
3339         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3340
3341         bool needs_entity = declaration->address_taken;
3342         type_t *type = skip_typeref(declaration->type);
3343
3344         if(is_type_array(type) || is_type_compound(type)) {
3345                 needs_entity = true;
3346         }
3347
3348         if(needs_entity) {
3349                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3350                 create_declaration_entity(declaration,
3351                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3352                                           frame_type);
3353         } else {
3354                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3355                 declaration->v.value_number   = next_value_number_function;
3356                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3357                 ++next_value_number_function;
3358         }
3359
3360         create_declaration_initializer(declaration);
3361 }
3362
3363 static void create_local_static_variable(declaration_t *declaration)
3364 {
3365         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3366
3367         type_t    *const type        = skip_typeref(declaration->type);
3368         ir_type   *const global_type = get_glob_type();
3369         ident     *const id          = unique_ident(declaration->symbol->string);
3370         ir_type   *const irtype      = get_ir_type(type);
3371         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3372         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3373         set_entity_ld_ident(entity, id);
3374
3375         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3376         declaration->v.entity         = entity;
3377         set_entity_variability(entity, variability_uninitialized);
3378         set_entity_visibility(entity, visibility_local);
3379         set_entity_allocation(entity, allocation_static);
3380
3381         ir_graph *const old_current_ir_graph = current_ir_graph;
3382         current_ir_graph = get_const_code_irg();
3383
3384         create_declaration_initializer(declaration);
3385
3386         assert(current_ir_graph == get_const_code_irg());
3387         current_ir_graph = old_current_ir_graph;
3388 }
3389
3390
3391
3392 static void return_statement_to_firm(return_statement_t *statement)
3393 {
3394         if(get_cur_block() == NULL)
3395                 return;
3396
3397         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3398         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3399
3400
3401         ir_node *in[1];
3402         int      in_len;
3403         if(get_method_n_ress(func_irtype) > 0) {
3404                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3405
3406                 if(statement->value != NULL) {
3407                         ir_node *node = expression_to_firm(statement->value);
3408                         node  = do_strict_conv(dbgi, node);
3409                         in[0] = node;
3410                 } else {
3411                         ir_mode *mode;
3412                         if(is_compound_type(res_type)) {
3413                                 mode = mode_P_data;
3414                         } else {
3415                                 mode = get_type_mode(res_type);
3416                         }
3417                         in[0] = new_Unknown(mode);
3418                 }
3419                 in_len = 1;
3420         } else {
3421                 /* build return_value for its side effects */
3422                 if(statement->value != NULL) {
3423                         expression_to_firm(statement->value);
3424                 }
3425                 in_len = 0;
3426         }
3427
3428         ir_node  *store = get_store();
3429         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
3430
3431         ir_node *end_block = get_irg_end_block(current_ir_graph);
3432         add_immBlock_pred(end_block, ret);
3433
3434         set_cur_block(NULL);
3435 }
3436
3437 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3438 {
3439         if(get_cur_block() == NULL)
3440                 return NULL;
3441
3442         return expression_to_firm(statement->expression);
3443 }
3444
3445 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3446 {
3447         ir_node     *result    = NULL;
3448         statement_t *statement = compound->statements;
3449         for( ; statement != NULL; statement = statement->base.next) {
3450                 //context2firm(&statement->scope);
3451
3452                 if(statement->base.next == NULL
3453                                 && statement->kind == STATEMENT_EXPRESSION) {
3454                         result = expression_statement_to_firm(
3455                                         &statement->expression);
3456                         break;
3457                 }
3458                 statement_to_firm(statement);
3459         }
3460
3461         return result;
3462 }
3463
3464 static void create_global_variable(declaration_t *declaration)
3465 {
3466         ir_visibility  vis;
3467         ir_type       *var_type;
3468         switch ((storage_class_tag_t)declaration->storage_class) {
3469                 case STORAGE_CLASS_STATIC:
3470                         vis = visibility_local;
3471                         goto global_var;
3472
3473                 case STORAGE_CLASS_EXTERN:
3474                         vis = visibility_external_allocated;
3475                         goto global_var;
3476
3477                 case STORAGE_CLASS_NONE:
3478                         vis = visibility_external_visible;
3479                         goto global_var;
3480
3481                 case STORAGE_CLASS_THREAD:
3482                         vis = visibility_external_visible;
3483                         goto tls_var;
3484
3485                 case STORAGE_CLASS_THREAD_EXTERN:
3486                         vis = visibility_external_allocated;
3487                         goto tls_var;
3488
3489                 case STORAGE_CLASS_THREAD_STATIC:
3490                         vis = visibility_local;
3491                         goto tls_var;
3492
3493 tls_var:
3494                         var_type = get_tls_type();
3495                         goto create_var;
3496
3497 global_var:
3498                         var_type = get_glob_type();
3499                         goto create_var;
3500
3501 create_var:
3502                         create_declaration_entity(declaration,
3503                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
3504                                                   var_type);
3505                         set_entity_visibility(declaration->v.entity, vis);
3506
3507                         return;
3508
3509                 case STORAGE_CLASS_TYPEDEF:
3510                 case STORAGE_CLASS_AUTO:
3511                 case STORAGE_CLASS_REGISTER:
3512                 case STORAGE_CLASS_ENUM_ENTRY:
3513                         break;
3514         }
3515         panic("Invalid storage class for global variable");
3516 }
3517
3518 static void create_local_declaration(declaration_t *declaration)
3519 {
3520         if(declaration->symbol == NULL)
3521                 return;
3522
3523         type_t *type = skip_typeref(declaration->type);
3524
3525         switch ((storage_class_tag_t) declaration->storage_class) {
3526         case STORAGE_CLASS_STATIC:
3527                 create_local_static_variable(declaration);
3528                 return;
3529         case STORAGE_CLASS_ENUM_ENTRY:
3530                 panic("enum entry declaration in local block found");
3531         case STORAGE_CLASS_EXTERN:
3532                 create_global_variable(declaration);
3533                 create_declaration_initializer(declaration);
3534                 return;
3535         case STORAGE_CLASS_NONE:
3536         case STORAGE_CLASS_AUTO:
3537         case STORAGE_CLASS_REGISTER:
3538                 if(is_type_function(type)) {
3539                         if(declaration->init.statement != NULL) {
3540                                 panic("nested functions not supported yet");
3541                         } else {
3542                                 get_function_entity(declaration);
3543                         }
3544                 } else {
3545                         create_local_variable(declaration);
3546                 }
3547                 return;
3548         case STORAGE_CLASS_TYPEDEF:
3549         case STORAGE_CLASS_THREAD:
3550         case STORAGE_CLASS_THREAD_EXTERN:
3551         case STORAGE_CLASS_THREAD_STATIC:
3552                 return;
3553         }
3554         panic("invalid storage class found");
3555 }
3556
3557 static void declaration_statement_to_firm(declaration_statement_t *statement)
3558 {
3559         declaration_t *declaration = statement->declarations_begin;
3560         declaration_t *end         = statement->declarations_end->next;
3561         for( ; declaration != end; declaration = declaration->next) {
3562                 if(declaration->namespc != NAMESPACE_NORMAL)
3563                         continue;
3564                 create_local_declaration(declaration);
3565         }
3566 }
3567
3568 static void if_statement_to_firm(if_statement_t *statement)
3569 {
3570         ir_node *cur_block = get_cur_block();
3571
3572         ir_node *fallthrough_block = new_immBlock();
3573
3574         /* the true (blocks) */
3575         ir_node *true_block;
3576         if (statement->true_statement != NULL) {
3577                 true_block = new_immBlock();
3578                 statement_to_firm(statement->true_statement);
3579                 if(get_cur_block() != NULL) {
3580                         ir_node *jmp = new_Jmp();
3581                         add_immBlock_pred(fallthrough_block, jmp);
3582                 }
3583         } else {
3584                 true_block = fallthrough_block;
3585         }
3586
3587         /* the false (blocks) */
3588         ir_node *false_block;
3589         if(statement->false_statement != NULL) {
3590                 false_block = new_immBlock();
3591
3592                 statement_to_firm(statement->false_statement);
3593                 if(get_cur_block() != NULL) {
3594                         ir_node *jmp = new_Jmp();
3595                         add_immBlock_pred(fallthrough_block, jmp);
3596                 }
3597         } else {
3598                 false_block = fallthrough_block;
3599         }
3600
3601         /* create the condition */
3602         if(cur_block != NULL) {
3603                 set_cur_block(cur_block);
3604                 create_condition_evaluation(statement->condition, true_block,
3605                                             false_block);
3606         }
3607
3608         mature_immBlock(true_block);
3609         if(false_block != fallthrough_block) {
3610                 mature_immBlock(false_block);
3611         }
3612         mature_immBlock(fallthrough_block);
3613
3614         set_cur_block(fallthrough_block);
3615 }
3616
3617 static void while_statement_to_firm(while_statement_t *statement)
3618 {
3619         ir_node *jmp = NULL;
3620         if(get_cur_block() != NULL) {
3621                 jmp = new_Jmp();
3622         }
3623
3624         /* create the header block */
3625         ir_node *header_block = new_immBlock();
3626         if(jmp != NULL) {
3627                 add_immBlock_pred(header_block, jmp);
3628         }
3629
3630         /* the false block */
3631         ir_node *false_block = new_immBlock();
3632
3633         /* the loop body */
3634         ir_node *body_block;
3635         if (statement->body != NULL) {
3636                 ir_node *old_continue_label = continue_label;
3637                 ir_node *old_break_label    = break_label;
3638                 continue_label              = header_block;
3639                 break_label                 = false_block;
3640
3641                 body_block = new_immBlock();
3642                 statement_to_firm(statement->body);
3643
3644                 assert(continue_label == header_block);
3645                 assert(break_label    == false_block);
3646                 continue_label = old_continue_label;
3647                 break_label    = old_break_label;
3648
3649                 if(get_cur_block() != NULL) {
3650                         jmp = new_Jmp();
3651                         add_immBlock_pred(header_block, jmp);
3652                 }
3653         } else {
3654                 body_block = header_block;
3655         }
3656
3657         /* create the condition */
3658         set_cur_block(header_block);
3659
3660         create_condition_evaluation(statement->condition, body_block, false_block);
3661         mature_immBlock(body_block);
3662         mature_immBlock(false_block);
3663         mature_immBlock(header_block);
3664
3665         set_cur_block(false_block);
3666 }
3667
3668 static void do_while_statement_to_firm(do_while_statement_t *statement)
3669 {
3670         ir_node *jmp = NULL;
3671         if(get_cur_block() != NULL) {
3672                 jmp = new_Jmp();
3673         }
3674
3675         /* create the header block */
3676         ir_node *header_block = new_immBlock();
3677
3678         /* the false block */
3679         ir_node *false_block = new_immBlock();
3680
3681         /* the loop body */
3682         ir_node *body_block = new_immBlock();
3683         if(jmp != NULL) {
3684                 add_immBlock_pred(body_block, jmp);
3685         }
3686
3687         if (statement->body != NULL) {
3688                 ir_node *old_continue_label = continue_label;
3689                 ir_node *old_break_label    = break_label;
3690                 continue_label              = header_block;
3691                 break_label                 = false_block;
3692
3693                 statement_to_firm(statement->body);
3694
3695                 assert(continue_label == header_block);
3696                 assert(break_label    == false_block);
3697                 continue_label = old_continue_label;
3698                 break_label    = old_break_label;
3699
3700                 if (get_cur_block() == NULL) {
3701                         mature_immBlock(header_block);
3702                         mature_immBlock(body_block);
3703                         mature_immBlock(false_block);
3704                         return;
3705                 }
3706         }
3707
3708         ir_node *body_jmp = new_Jmp();
3709         add_immBlock_pred(header_block, body_jmp);
3710         mature_immBlock(header_block);
3711
3712         /* create the condition */
3713         set_cur_block(header_block);
3714
3715         create_condition_evaluation(statement->condition, body_block, false_block);
3716         mature_immBlock(body_block);
3717         mature_immBlock(false_block);
3718         mature_immBlock(header_block);
3719
3720         set_cur_block(false_block);
3721 }
3722
3723 static void for_statement_to_firm(for_statement_t *statement)
3724 {
3725         ir_node *jmp = NULL;
3726         if (get_cur_block() != NULL) {
3727                 if(statement->initialisation != NULL) {
3728                         expression_to_firm(statement->initialisation);
3729                 }
3730
3731                 /* create declarations */
3732                 declaration_t *declaration = statement->scope.declarations;
3733                 for( ; declaration != NULL; declaration = declaration->next) {
3734                         create_local_declaration(declaration);
3735                 }
3736
3737                 jmp = new_Jmp();
3738         }
3739
3740
3741         /* create the step block */
3742         ir_node *const step_block = new_immBlock();
3743         if (statement->step != NULL) {
3744                 expression_to_firm(statement->step);
3745         }
3746         ir_node *const step_jmp = new_Jmp();
3747
3748         /* create the header block */
3749         ir_node *const header_block = new_immBlock();
3750         if (jmp != NULL) {
3751                 add_immBlock_pred(header_block, jmp);
3752         }
3753         add_immBlock_pred(header_block, step_jmp);
3754
3755         /* the false block */
3756         ir_node *const false_block = new_immBlock();
3757
3758         /* the loop body */
3759         ir_node * body_block;
3760         if (statement->body != NULL) {
3761                 ir_node *const old_continue_label = continue_label;
3762                 ir_node *const old_break_label    = break_label;
3763                 continue_label = step_block;
3764                 break_label    = false_block;
3765
3766                 body_block = new_immBlock();
3767                 statement_to_firm(statement->body);
3768
3769                 assert(continue_label == step_block);
3770                 assert(break_label    == false_block);
3771                 continue_label = old_continue_label;
3772                 break_label    = old_break_label;
3773
3774                 if (get_cur_block() != NULL) {
3775                         jmp = new_Jmp();
3776                         add_immBlock_pred(step_block, jmp);
3777                 }
3778         } else {
3779                 body_block = step_block;
3780         }
3781
3782         /* create the condition */
3783         set_cur_block(header_block);
3784         if (statement->condition != NULL) {
3785                 create_condition_evaluation(statement->condition, body_block,
3786                                             false_block);
3787         } else {
3788                 keep_alive(header_block);
3789                 jmp = new_Jmp();
3790                 add_immBlock_pred(body_block, jmp);
3791         }
3792
3793         mature_immBlock(body_block);
3794         mature_immBlock(false_block);
3795         mature_immBlock(step_block);
3796         mature_immBlock(header_block);
3797         mature_immBlock(false_block);
3798
3799         set_cur_block(false_block);
3800 }
3801
3802 static void create_jump_statement(const statement_t *statement,
3803                                   ir_node *target_block)
3804 {
3805         if(get_cur_block() == NULL)
3806                 return;
3807
3808         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
3809         ir_node  *jump = new_d_Jmp(dbgi);
3810         add_immBlock_pred(target_block, jump);
3811
3812         set_cur_block(NULL);
3813 }
3814
3815 static void switch_statement_to_firm(const switch_statement_t *statement)
3816 {
3817         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
3818
3819         ir_node *expression  = expression_to_firm(statement->expression);
3820         ir_node *cond        = new_d_Cond(dbgi, expression);
3821         ir_node *break_block = new_immBlock();
3822
3823         set_cur_block(NULL);
3824
3825         ir_node *const old_switch_cond       = current_switch_cond;
3826         ir_node *const old_break_label       = break_label;
3827         const bool     old_saw_default_label = saw_default_label;
3828         current_switch_cond                  = cond;
3829         break_label                          = break_block;
3830
3831         if (statement->body != NULL) {
3832                 statement_to_firm(statement->body);
3833         }
3834
3835         if(get_cur_block() != NULL) {
3836                 ir_node *jmp = new_Jmp();
3837                 add_immBlock_pred(break_block, jmp);
3838         }
3839
3840         if (!saw_default_label) {
3841                 set_cur_block(get_nodes_block(cond));
3842                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
3843                                                         MAGIC_DEFAULT_PN_NUMBER);
3844                 add_immBlock_pred(break_block, proj);
3845         }
3846
3847         assert(current_switch_cond == cond);
3848         assert(break_label         == break_block);
3849         current_switch_cond = old_switch_cond;
3850         break_label         = old_break_label;
3851         saw_default_label   = old_saw_default_label;
3852
3853         mature_immBlock(break_block);
3854         set_cur_block(break_block);
3855 }
3856
3857 static void case_label_to_firm(const case_label_statement_t *statement)
3858 {
3859         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
3860
3861         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
3862
3863         /* let's create a node and hope firm constant folding creates a Const
3864          * node... */
3865         ir_node *proj;
3866         ir_node *old_block = get_nodes_block(current_switch_cond);
3867         ir_node *block     = new_immBlock();
3868
3869         set_cur_block(old_block);
3870         if(statement->expression != NULL) {
3871                 long start_pn = fold_constant(statement->expression);
3872                 long end_pn = start_pn;
3873                 if (statement->end_range != NULL) {
3874                         end_pn = fold_constant(statement->end_range);
3875                 }
3876                 assert(start_pn <= end_pn);
3877                 /* create jumps for all cases in the given range */
3878                 for (long pn = start_pn; pn <= end_pn; ++pn) {
3879                         if(pn == MAGIC_DEFAULT_PN_NUMBER) {
3880                                 /* oops someone detected our cheating... */
3881                                 panic("magic default pn used");
3882                         }
3883                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
3884                         add_immBlock_pred(block, proj);
3885                 }
3886         } else {
3887                 saw_default_label = true;
3888                 proj = new_d_defaultProj(dbgi, current_switch_cond,
3889                                          MAGIC_DEFAULT_PN_NUMBER);
3890
3891                 add_immBlock_pred(block, proj);
3892         }
3893
3894         if (fallthrough != NULL) {
3895                 add_immBlock_pred(block, fallthrough);
3896         }
3897         mature_immBlock(block);
3898         set_cur_block(block);
3899
3900         if(statement->statement != NULL) {
3901                 statement_to_firm(statement->statement);
3902         }
3903 }
3904
3905 static ir_node *get_label_block(declaration_t *label)
3906 {
3907         assert(label->namespc == NAMESPACE_LABEL);
3908
3909         if(label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
3910                 return label->v.block;
3911         }
3912         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
3913
3914         ir_node *old_cur_block = get_cur_block();
3915         ir_node *block         = new_immBlock();
3916         set_cur_block(old_cur_block);
3917
3918         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
3919         label->v.block          = block;
3920
3921         ARR_APP1(ir_node *, imature_blocks, block);
3922
3923         return block;
3924 }
3925
3926 static void label_to_firm(const label_statement_t *statement)
3927 {
3928         ir_node *block = get_label_block(statement->label);
3929
3930         if(get_cur_block() != NULL) {
3931                 ir_node *jmp = new_Jmp();
3932                 add_immBlock_pred(block, jmp);
3933         }
3934
3935         set_cur_block(block);
3936         keep_alive(block);
3937
3938         if(statement->statement != NULL) {
3939                 statement_to_firm(statement->statement);
3940         }
3941 }
3942
3943 static void goto_to_firm(const goto_statement_t *statement)
3944 {
3945         if(get_cur_block() == NULL)
3946                 return;
3947
3948         ir_node *block = get_label_block(statement->label);
3949         ir_node *jmp   = new_Jmp();
3950         add_immBlock_pred(block, jmp);
3951
3952         set_cur_block(NULL);
3953 }
3954
3955 typedef enum modifier_t {
3956         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
3957         ASM_MODIFIER_READ_WRITE   = 1 << 1,
3958         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
3959         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
3960 } modifier_t;
3961
3962 static void asm_statement_to_firm(const asm_statement_t *statement)
3963 {
3964         (void) statement;
3965         fprintf(stderr, "WARNING asm not implemented yet!\n");
3966 #if 0
3967         bool needs_memory = false;
3968
3969         size_t         n_clobbers = 0;
3970         asm_clobber_t *clobber    = statement->clobbers;
3971         for( ; clobber != NULL; clobber = clobber->next) {
3972                 if(strcmp(clobber->clobber, "memory") == 0) {
3973                         needs_memory = true;
3974                         continue;
3975                 }
3976
3977                 ident *id = new_id_from_str(clobber->clobber);
3978                 obstack_ptr_grow(&asm_obst, id);
3979                 ++n_clobbers;
3980         }
3981         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
3982         ident **clobbers = NULL;
3983         if(n_clobbers > 0) {
3984                 clobbers = obstack_finish(&asm_obst);
3985         }
3986
3987         /* find and count input and output constraints */
3988         asm_constraint_t *constraint = statement->inputs;
3989         for( ; constraint != NULL; constraint = constraint->next) {
3990                 int  modifiers      = 0;
3991                 bool supports_memop = false;
3992                 for(const char *c = constraint->constraints; *c != 0; ++c) {
3993                         /* TODO: improve error messages */
3994                         switch(*c) {
3995                         case '?':
3996                         case '!':
3997                                 panic("multiple alternative assembler constraints not "
3998                                       "supported");
3999                         case 'm':
4000                         case 'o':
4001                         case 'V':
4002                         case '<':
4003                         case '>':
4004                         case 'X':
4005                                 supports_memop = true;
4006                                 obstack_1grow(&asm_obst, *c);
4007                                 break;
4008                         case '=':
4009                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
4010                                         panic("inconsistent register constraints");
4011                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
4012                                 break;
4013                         case '+':
4014                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
4015                                         panic("inconsistent register constraints");
4016                                 modifiers |= ASM_MODIFIER_READ_WRITE;
4017                                 break;
4018                         case '&':
4019                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
4020                                 panic("early clobber assembler constraint not supported yet");
4021                                 break;
4022                         case '%':
4023                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
4024                                 panic("commutative assembler constraint not supported yet");
4025                                 break;
4026                         case '#':
4027                                 /* skip register preferences stuff... */
4028                                 while(*c != 0 && *c != ',')
4029                                         ++c;
4030                                 break;
4031                         case '*':
4032                                 /* skip register preferences stuff... */
4033                                 ++c;
4034                                 break;
4035                         default:
4036                                 obstack_1grow(&asm_obst, *c);
4037                                 break;
4038                         }
4039                 }
4040                 obstack_1grow(&asm_obst, '\0');
4041                 const char *constraint_string = obstack_finish(&asm_obst);
4042
4043                 needs_memory |= supports_memop;
4044                 if(supports_memop) {
4045
4046                 }
4047         }
4048 #endif
4049 }
4050
4051 static void statement_to_firm(statement_t *statement)
4052 {
4053         switch(statement->kind) {
4054         case STATEMENT_INVALID:
4055                 panic("invalid statement found");
4056         case STATEMENT_COMPOUND:
4057                 compound_statement_to_firm(&statement->compound);
4058                 return;
4059         case STATEMENT_RETURN:
4060                 return_statement_to_firm(&statement->returns);
4061                 return;
4062         case STATEMENT_EXPRESSION:
4063                 expression_statement_to_firm(&statement->expression);
4064                 return;
4065         case STATEMENT_IF:
4066                 if_statement_to_firm(&statement->ifs);
4067                 return;
4068         case STATEMENT_WHILE:
4069                 while_statement_to_firm(&statement->whiles);
4070                 return;
4071         case STATEMENT_DO_WHILE:
4072                 do_while_statement_to_firm(&statement->do_while);
4073                 return;
4074         case STATEMENT_DECLARATION:
4075                 declaration_statement_to_firm(&statement->declaration);
4076                 return;
4077         case STATEMENT_BREAK:
4078                 create_jump_statement(statement, break_label);
4079                 return;
4080         case STATEMENT_CONTINUE:
4081                 create_jump_statement(statement, continue_label);
4082                 return;
4083         case STATEMENT_SWITCH:
4084                 switch_statement_to_firm(&statement->switchs);
4085                 return;
4086         case STATEMENT_CASE_LABEL:
4087                 case_label_to_firm(&statement->case_label);
4088                 return;
4089         case STATEMENT_FOR:
4090                 for_statement_to_firm(&statement->fors);
4091                 return;
4092         case STATEMENT_LABEL:
4093                 label_to_firm(&statement->label);
4094                 return;
4095         case STATEMENT_GOTO:
4096                 goto_to_firm(&statement->gotos);
4097                 return;
4098         case STATEMENT_ASM:
4099                 asm_statement_to_firm(&statement->asms);
4100                 return;
4101         }
4102         panic("Statement not implemented\n");
4103 }
4104
4105 static int count_decls_in_expression(const expression_t *expression);
4106
4107 static int count_local_declarations(const declaration_t *      decl,
4108                                     const declaration_t *const end)
4109 {
4110         int count = 0;
4111         for (; decl != end; decl = decl->next) {
4112                 if(decl->namespc != NAMESPACE_NORMAL)
4113                         continue;
4114                 const type_t *type = skip_typeref(decl->type);
4115                 if (!decl->address_taken && is_type_scalar(type))
4116                         ++count;
4117                 const initializer_t *initializer = decl->init.initializer;
4118                 /* FIXME: should walk initializer hierarchies... */
4119                 if(initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4120                         count += count_decls_in_expression(initializer->value.value);
4121                 }
4122         }
4123         return count;
4124 }
4125
4126 static int count_decls_in_expression(const expression_t *expression) {
4127         if(expression == NULL)
4128                 return 0;
4129
4130         switch(expression->base.kind) {
4131         case EXPR_STATEMENT:
4132                 return count_decls_in_stmts(expression->statement.statement);
4133         EXPR_BINARY_CASES {
4134                 int count_left  = count_decls_in_expression(expression->binary.left);
4135                 int count_right = count_decls_in_expression(expression->binary.right);
4136                 return count_left + count_right;
4137         }
4138         EXPR_UNARY_CASES
4139                 return count_decls_in_expression(expression->unary.value);
4140         case EXPR_CALL: {
4141                 int count = 0;
4142                 call_argument_t *argument = expression->call.arguments;
4143                 for( ; argument != NULL; argument = argument->next) {
4144                         count += count_decls_in_expression(argument->expression);
4145                 }
4146                 return count;
4147         }
4148
4149         default:
4150                 break;
4151         }
4152
4153         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
4154          * (or implement all the missing expressions here/implement a walker)
4155          */
4156
4157         return 0;
4158 }
4159
4160 static int count_decls_in_stmts(const statement_t *stmt)
4161 {
4162         int count = 0;
4163         for (; stmt != NULL; stmt = stmt->base.next) {
4164                 switch (stmt->kind) {
4165                         case STATEMENT_DECLARATION: {
4166                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
4167                                 count += count_local_declarations(decl_stmt->declarations_begin,
4168                                                                   decl_stmt->declarations_end->next);
4169                                 break;
4170                         }
4171
4172                         case STATEMENT_COMPOUND: {
4173                                 const compound_statement_t *const comp =
4174                                         &stmt->compound;
4175                                 count += count_decls_in_stmts(comp->statements);
4176                                 break;
4177                         }
4178
4179                         case STATEMENT_IF: {
4180                                 const if_statement_t *const if_stmt = &stmt->ifs;
4181                                 count += count_decls_in_expression(if_stmt->condition);
4182                                 count += count_decls_in_stmts(if_stmt->true_statement);
4183                                 count += count_decls_in_stmts(if_stmt->false_statement);
4184                                 break;
4185                         }
4186
4187                         case STATEMENT_SWITCH: {
4188                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
4189                                 count += count_decls_in_expression(switch_stmt->expression);
4190                                 count += count_decls_in_stmts(switch_stmt->body);
4191                                 break;
4192                         }
4193
4194                         case STATEMENT_LABEL: {
4195                                 const label_statement_t *const label_stmt = &stmt->label;
4196                                 if(label_stmt->statement != NULL) {
4197                                         count += count_decls_in_stmts(label_stmt->statement);
4198                                 }
4199                                 break;
4200                         }
4201
4202                         case STATEMENT_WHILE: {
4203                                 const while_statement_t *const while_stmt = &stmt->whiles;
4204                                 count += count_decls_in_expression(while_stmt->condition);
4205                                 count += count_decls_in_stmts(while_stmt->body);
4206                                 break;
4207                         }
4208
4209                         case STATEMENT_DO_WHILE: {
4210                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
4211                                 count += count_decls_in_expression(do_while_stmt->condition);
4212                                 count += count_decls_in_stmts(do_while_stmt->body);
4213                                 break;
4214                         }
4215
4216                         case STATEMENT_FOR: {
4217                                 const for_statement_t *const for_stmt = &stmt->fors;
4218                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
4219                                 count += count_decls_in_expression(for_stmt->initialisation);
4220                                 count += count_decls_in_expression(for_stmt->condition);
4221                                 count += count_decls_in_expression(for_stmt->step);
4222                                 count += count_decls_in_stmts(for_stmt->body);
4223                                 break;
4224                         }
4225
4226                         case STATEMENT_CASE_LABEL: {
4227                                 const case_label_statement_t *label = &stmt->case_label;
4228                                 count += count_decls_in_expression(label->expression);
4229                                 if(label->statement != NULL) {
4230                                         count += count_decls_in_stmts(label->statement);
4231                                 }
4232                                 break;
4233                         }
4234
4235                         case STATEMENT_ASM:
4236                         case STATEMENT_BREAK:
4237                         case STATEMENT_CONTINUE:
4238                                 break;
4239
4240                         case STATEMENT_EXPRESSION: {
4241                                 const expression_statement_t *expr_stmt = &stmt->expression;
4242                                 count += count_decls_in_expression(expr_stmt->expression);
4243                                 break;
4244                         }
4245
4246                         case STATEMENT_GOTO:
4247                         case STATEMENT_INVALID:
4248                                 break;
4249
4250                         case STATEMENT_RETURN: {
4251                                 const return_statement_t *ret_stmt = &stmt->returns;
4252                                 count += count_decls_in_expression(ret_stmt->value);
4253                                 break;
4254                         }
4255                 }
4256         }
4257         return count;
4258 }
4259
4260 static int get_function_n_local_vars(declaration_t *declaration)
4261 {
4262         int count = 0;
4263
4264         /* count parameters */
4265         count += count_local_declarations(declaration->scope.declarations, NULL);
4266
4267         /* count local variables declared in body */
4268         count += count_decls_in_stmts(declaration->init.statement);
4269
4270         return count;
4271 }
4272
4273 static void initialize_function_parameters(declaration_t *declaration)
4274 {
4275         ir_graph        *irg             = current_ir_graph;
4276         ir_node         *args            = get_irg_args(irg);
4277         ir_node         *start_block     = get_irg_start_block(irg);
4278         ir_type         *function_irtype = get_ir_type(declaration->type);
4279
4280         int            n         = 0;
4281         declaration_t *parameter = declaration->scope.declarations;
4282         for( ; parameter != NULL; parameter = parameter->next, ++n) {
4283                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
4284                 type_t *type = skip_typeref(parameter->type);
4285
4286                 bool needs_entity = parameter->address_taken;
4287                 assert(!is_type_array(type));
4288                 if(is_type_compound(type)) {
4289                         needs_entity = true;
4290                 }
4291
4292                 if(needs_entity) {
4293                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
4294                         ident     *id     = new_id_from_str(parameter->symbol->string);
4295                         set_entity_ident(entity, id);
4296
4297                         parameter->declaration_kind
4298                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
4299                         parameter->v.entity = entity;
4300                         continue;
4301                 }
4302
4303                 ir_mode *mode = get_ir_mode(parameter->type);
4304                 long     pn   = n;
4305                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
4306
4307                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
4308                 parameter->v.value_number   = next_value_number_function;
4309                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
4310                 ++next_value_number_function;
4311
4312                 set_value(parameter->v.value_number, proj);
4313         }
4314 }
4315
4316 /**
4317  * Handle additional decl modifiers for IR-graphs
4318  *
4319  * @param irg            the IR-graph
4320  * @param dec_modifiers  additional modifiers
4321  */
4322 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
4323 {
4324         if (decl_modifiers & DM_NORETURN) {
4325                 /* TRUE if the declaration includes the Microsoft
4326                    __declspec(noreturn) specifier. */
4327                 set_irg_additional_property(irg, mtp_property_noreturn);
4328         }
4329         if (decl_modifiers & DM_NOTHROW) {
4330                 /* TRUE if the declaration includes the Microsoft
4331                    __declspec(nothrow) specifier. */
4332                 set_irg_additional_property(irg, mtp_property_nothrow);
4333         }
4334         if (decl_modifiers & DM_NAKED) {
4335                 /* TRUE if the declaration includes the Microsoft
4336                    __declspec(naked) specifier. */
4337                 set_irg_additional_property(irg, mtp_property_naked);
4338         }
4339         if (decl_modifiers & DM_FORCEINLINE) {
4340                 /* TRUE if the declaration includes the
4341                    Microsoft __forceinline specifier. */
4342                 set_irg_inline_property(irg, irg_inline_forced);
4343         }
4344         if (decl_modifiers & DM_NOINLINE) {
4345                 /* TRUE if the declaration includes the Microsoft
4346                    __declspec(noinline) specifier. */
4347                 set_irg_inline_property(irg, irg_inline_forbidden);
4348         }
4349 }
4350
4351 static void create_function(declaration_t *declaration)
4352 {
4353         ir_entity *function_entity = get_function_entity(declaration);
4354
4355         if(declaration->init.statement == NULL)
4356                 return;
4357
4358         current_function_decl = declaration;
4359         current_function_name = NULL;
4360
4361         assert(imature_blocks == NULL);
4362         imature_blocks = NEW_ARR_F(ir_node*, 0);
4363
4364         int       n_local_vars = get_function_n_local_vars(declaration);
4365         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
4366         ir_node  *first_block  = get_cur_block();
4367
4368         /* set inline flags */
4369         if (declaration->is_inline)
4370         set_irg_inline_property(irg, irg_inline_recomended);
4371     handle_decl_modifier_irg(irg, declaration->modifiers);
4372
4373         next_value_number_function = 0;
4374         initialize_function_parameters(declaration);
4375
4376         statement_to_firm(declaration->init.statement);
4377
4378         ir_node *end_block = get_irg_end_block(irg);
4379
4380         /* do we have a return statement yet? */
4381         if(get_cur_block() != NULL) {
4382                 type_t *type = skip_typeref(declaration->type);
4383                 assert(is_type_function(type));
4384                 const function_type_t *func_type   = &type->function;
4385                 const type_t          *return_type
4386                         = skip_typeref(func_type->return_type);
4387
4388                 ir_node *ret;
4389                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
4390                         ret = new_Return(get_store(), 0, NULL);
4391                 } else {
4392                         ir_mode *mode;
4393                         if(is_type_scalar(return_type)) {
4394                                 mode = get_ir_mode(func_type->return_type);
4395                         } else {
4396                                 mode = mode_P_data;
4397                         }
4398
4399                         ir_node *in[1];
4400                         /* §5.1.2.2.3 main implicitly returns 0 */
4401                         if (strcmp(declaration->symbol->string, "main") == 0) {
4402                                 in[0] = new_Const(mode, get_mode_null(mode));
4403                         } else {
4404                                 in[0] = new_Unknown(mode);
4405                         }
4406                         ret = new_Return(get_store(), 1, in);
4407                 }
4408                 add_immBlock_pred(end_block, ret);
4409         }
4410
4411         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
4412                 mature_immBlock(imature_blocks[i]);
4413         }
4414         DEL_ARR_F(imature_blocks);
4415         imature_blocks = NULL;
4416
4417         mature_immBlock(first_block);
4418         mature_immBlock(end_block);
4419
4420         irg_finalize_cons(irg);
4421
4422         /* finalize the frame type */
4423         ir_type *frame_type = get_irg_frame_type(irg);
4424         int      n          = get_compound_n_members(frame_type);
4425         int      align_all  = 4;
4426         int      offset     = 0;
4427         for(int i = 0; i < n; ++i) {
4428                 ir_entity *entity      = get_compound_member(frame_type, i);
4429                 ir_type   *entity_type = get_entity_type(entity);
4430
4431                 int align = get_type_alignment_bytes(entity_type);
4432                 if(align > align_all)
4433                         align_all = align;
4434                 int misalign = 0;
4435                 if(align > 0) {
4436                         misalign  = offset % align;
4437                         if(misalign > 0) {
4438                                 offset += align - misalign;
4439                         }
4440                 }
4441
4442                 set_entity_offset(entity, offset);
4443                 offset += get_type_size_bytes(entity_type);
4444         }
4445         set_type_size_bytes(frame_type, offset);
4446         set_type_alignment_bytes(frame_type, align_all);
4447         set_type_state(frame_type, layout_fixed);
4448
4449         irg_vrfy(irg);
4450 }
4451
4452 static void scope_to_firm(scope_t *scope)
4453 {
4454         /* first pass: create declarations */
4455         declaration_t *declaration = scope->declarations;
4456         for( ; declaration != NULL; declaration = declaration->next) {
4457                 if(declaration->namespc != NAMESPACE_NORMAL)
4458                         continue;
4459                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4460                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4461                         continue;
4462                 if(declaration->symbol == NULL)
4463                         continue;
4464
4465                 type_t *type = skip_typeref(declaration->type);
4466                 if(is_type_function(type)) {
4467                         get_function_entity(declaration);
4468                 } else {
4469                         create_global_variable(declaration);
4470                 }
4471         }
4472
4473         /* second pass: create code/initializers */
4474         declaration = scope->declarations;
4475         for( ; declaration != NULL; declaration = declaration->next) {
4476                 if(declaration->namespc != NAMESPACE_NORMAL)
4477                         continue;
4478                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4479                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4480                         continue;
4481                 if(declaration->symbol == NULL)
4482                         continue;
4483
4484                 type_t *type = declaration->type;
4485                 if(type->kind == TYPE_FUNCTION) {
4486                         create_function(declaration);
4487                 } else {
4488                         assert(declaration->declaration_kind
4489                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
4490                         current_ir_graph = get_const_code_irg();
4491                         create_declaration_initializer(declaration);
4492                 }
4493         }
4494 }
4495
4496 void init_ast2firm(void)
4497 {
4498         obstack_init(&asm_obst);
4499         init_atomic_modes();
4500
4501         /* create idents for all known runtime functions */
4502         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
4503                 predef_idents[rts_data[i].id] = new_id_from_str(rts_data[i].name);
4504         }
4505 }
4506
4507 static void init_ir_types(void)
4508 {
4509         static int ir_types_initialized = 0;
4510         if(ir_types_initialized)
4511                 return;
4512         ir_types_initialized = 1;
4513
4514         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
4515         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
4516         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
4517
4518         ir_type_int        = get_ir_type(type_int);
4519         ir_type_const_char = get_ir_type(type_const_char);
4520         ir_type_wchar_t    = get_ir_type(type_wchar_t);
4521         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
4522                                                        type in firm */
4523
4524         type_void->base.firm_type = ir_type_void;
4525 }
4526
4527 void exit_ast2firm(void)
4528 {
4529         obstack_free(&asm_obst, NULL);
4530 }
4531
4532 void translation_unit_to_firm(translation_unit_t *unit)
4533 {
4534         /* just to be sure */
4535         continue_label      = NULL;
4536         break_label         = NULL;
4537         current_switch_cond = NULL;
4538
4539         init_ir_types();
4540
4541         scope_to_firm(&unit->scope);
4542 }