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 "driver/firm_opt.h"
  23 #include "driver/firm_cmdline.h"
  24
  25 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  26
  27 static ir_type *ir_type_const_char;
  28 static ir_type *ir_type_wchar_t;
  29 static ir_type *ir_type_void;
  30 static ir_type *ir_type_int;
  31
  32 static type_t *type_const_char;
  33 static type_t *type_void;
  34 static type_t *type_int;
  35
  36 static int       next_value_number_function;
  37 static ir_node  *continue_label;
  38 static ir_node  *break_label;
  39 static ir_node  *current_switch_cond;
  40 static bool      saw_default_label;
  41 static ir_node **imature_blocks;
  42
  43 static const declaration_t *current_function_decl;
  44 static ir_node             *current_function_name;
  45
  46 static struct obstack asm_obst;
  47
  48 typedef enum declaration_kind_t {
  49         DECLARATION_KIND_UNKNOWN,
  50         DECLARATION_KIND_FUNCTION,
  51         DECLARATION_KIND_GLOBAL_VARIABLE,
  52         DECLARATION_KIND_LOCAL_VARIABLE,
  53         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  54         DECLARATION_KIND_COMPOUND_MEMBER,
  55         DECLARATION_KIND_LABEL_BLOCK,
  56         DECLARATION_KIND_ENUM_ENTRY
  57 } declaration_kind_t;
  58
  59 static ir_type *get_ir_type(type_t *type);
  60 static int count_decls_in_stmts(const statement_t *stmt);
  61
  62 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  63 {
  64         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  65
  66         warningf(declaration->source_position, "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
 357
 358 static long fold_constant(const expression_t *expression);
 359
 360 static ir_type *create_atomic_type(const atomic_type_t *type)
 361 {
 362         dbg_info *dbgi  = get_dbg_info(&type->type.source_position);
 363         ir_mode *mode   = get_atomic_mode(type);
 364         ident   *id     = get_mode_ident(mode);
 365         ir_type *irtype = new_d_type_primitive(id, mode, dbgi);
 366
 367         if(type->akind == ATOMIC_TYPE_LONG_DOUBLE
 368                         || type->akind == ATOMIC_TYPE_DOUBLE) {
 369                 set_type_alignment_bytes(irtype, 4);
 370         }
 371
 372         return irtype;
 373 }
 374
 375 static ir_type *create_method_type(const function_type_t *function_type)
 376 {
 377         type_t  *return_type  = function_type->return_type;
 378
 379         ident   *id           = unique_ident("functiontype");
 380         int      n_parameters = count_parameters(function_type);
 381         int      n_results    = return_type == type_void ? 0 : 1;
 382         dbg_info *dbgi        = get_dbg_info(&function_type->type.source_position);
 383         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 384
 385         if(return_type != type_void) {
 386                 ir_type *restype = get_ir_type(return_type);
 387                 set_method_res_type(irtype, 0, restype);
 388         }
 389
 390         function_parameter_t *parameter = function_type->parameters;
 391         int                   n         = 0;
 392         for( ; parameter != NULL; parameter = parameter->next) {
 393                 ir_type *p_irtype = get_ir_type(parameter->type);
 394                 set_method_param_type(irtype, n, p_irtype);
 395                 ++n;
 396         }
 397
 398         if(function_type->variadic || function_type->unspecified_parameters) {
 399                 set_method_variadicity(irtype, variadicity_variadic);
 400         }
 401
 402         return irtype;
 403 }
 404
 405 static ir_type *create_pointer_type(pointer_type_t *type)
 406 {
 407         type_t  *points_to = type->points_to;
 408         ir_type *ir_points_to;
 409         /* Avoid endless recursion if the points_to type contains this poiner type
 410          * again (might be a struct). We therefore first create a void* pointer
 411          * and then set the real points_to type
 412          */
 413         dbg_info *dbgi   = get_dbg_info(&type->type.source_position);
 414         ir_type *ir_type = new_d_type_pointer(unique_ident("pointer"),
 415                                             ir_type_void, mode_P_data, dbgi);
 416         type->type.firm_type  = ir_type;
 417
 418         ir_points_to = get_ir_type(points_to);
 419         set_pointer_points_to_type(ir_type, ir_points_to);
 420
 421         return ir_type;
 422 }
 423
 424 static ir_type *create_array_type(array_type_t *type)
 425 {
 426         type_t  *element_type    = type->element_type;
 427         ir_type *ir_element_type = get_ir_type(element_type);
 428
 429         ident   *id      = unique_ident("array");
 430         dbg_info *dbgi   = get_dbg_info(&type->type.source_position);
 431         ir_type *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 432
 433         const int align = get_type_alignment_bytes(ir_element_type);
 434         set_type_alignment_bytes(ir_type, align);
 435
 436         if(type->size != NULL) {
 437                 int n_elements = fold_constant(type->size);
 438
 439                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 440
 441                 size_t elemsize = get_type_size_bytes(ir_element_type);
 442                 if(elemsize % align > 0) {
 443                         elemsize += align - (elemsize % align);
 444                 }
 445                 set_type_size_bytes(ir_type, n_elements * elemsize);
 446         } else {
 447                 set_array_lower_bound_int(ir_type, 0, 0);
 448         }
 449         set_type_state(ir_type, layout_fixed);
 450
 451         return ir_type;
 452 }
 453
 454 /**
 455  * Return the signed integer type of size bits.
 456  *
 457  * @param size   the size
 458  */
 459 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 460                                                  unsigned size)
 461 {
 462         static ir_mode *s_modes[64 + 1] = {NULL, };
 463         ir_type *res;
 464         ir_mode *mode;
 465
 466         if (size <= 0 || size > 64)
 467                 return NULL;
 468
 469         mode = s_modes[size];
 470         if (mode == NULL) {
 471                 char name[32];
 472
 473                 snprintf(name, sizeof(name), "bf_I%u", size);
 474                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 475                                    size <= 32 ? 32 : size );
 476                 s_modes[size] = mode;
 477         }
 478
 479         char name[32];
 480         snprintf(name, sizeof(name), "I%u", size);
 481         ident *id = new_id_from_str(name);
 482         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 483         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 484         set_primitive_base_type(res, base_tp);
 485
 486         return res;
 487 }
 488
 489 /**
 490  * Return the unsigned integer type of size bits.
 491  *
 492  * @param size   the size
 493  */
 494 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 495                                                    unsigned size)
 496 {
 497         static ir_mode *u_modes[64 + 1] = {NULL, };
 498         ir_type *res;
 499         ir_mode *mode;
 500
 501         if (size <= 0 || size > 64)
 502                 return NULL;
 503
 504         mode = u_modes[size];
 505         if (mode == NULL) {
 506                 char name[32];
 507
 508                 snprintf(name, sizeof(name), "bf_U%u", size);
 509                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 510                                    size <= 32 ? 32 : size );
 511                 u_modes[size] = mode;
 512         }
 513
 514         char name[32];
 515
 516         snprintf(name, sizeof(name), "U%u", size);
 517         ident *id = new_id_from_str(name);
 518         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 519         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 520         set_primitive_base_type(res, base_tp);
 521
 522         return res;
 523 }
 524
 525 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 526 {
 527         type_t *base = skip_typeref(type->base);
 528         assert(base->kind == TYPE_ATOMIC);
 529         ir_type *irbase = get_ir_type(base);
 530
 531         unsigned size = fold_constant(type->size);
 532
 533         assert(!is_type_float(base));
 534         if(is_type_signed(base)) {
 535                 return get_signed_int_type_for_bit_size(irbase, size);
 536         } else {
 537                 return get_unsigned_int_type_for_bit_size(irbase, size);
 538         }
 539 }
 540
 541 #define INVALID_TYPE ((ir_type_ptr)-1)
 542
 543 static ir_type *create_union_type(compound_type_t *type, ir_type *irtype,
 544                                   size_t *outer_offset, size_t *outer_align);
 545
 546 static ir_type *create_struct_type(compound_type_t *type, ir_type *irtype,
 547                                    size_t *outer_offset, size_t *outer_align)
 548 {
 549         declaration_t *declaration = type->declaration;
 550         if(declaration->v.irtype != NULL) {
 551                 return declaration->v.irtype;
 552         }
 553
 554         size_t align_all  = 1;
 555         size_t offset     = 0;
 556         size_t bit_offset = 0;
 557         if(irtype == NULL) {
 558                 symbol_t *symbol = declaration->symbol;
 559                 ident    *id;
 560                 if(symbol != NULL) {
 561                         id = unique_ident(symbol->string);
 562                 } else {
 563                         id = unique_ident("__anonymous_struct");
 564                 }
 565                 dbg_info *dbgi  = get_dbg_info(&type->type.source_position);
 566
 567                 irtype = new_d_type_struct(id, dbgi);
 568
 569                 declaration->v.irtype = irtype;
 570                 type->type.firm_type  = irtype;
 571         } else {
 572                 offset    = *outer_offset;
 573                 align_all = *outer_align;
 574         }
 575
 576         declaration_t *entry = declaration->scope.declarations;
 577         for( ; entry != NULL; entry = entry->next) {
 578                 if(entry->namespc != NAMESPACE_NORMAL)
 579                         continue;
 580
 581                 symbol_t *symbol     = entry->symbol;
 582                 type_t   *entry_type = skip_typeref(entry->type);
 583                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 584                 ident    *ident;
 585                 if(symbol != NULL) {
 586                         ident = new_id_from_str(symbol->string);
 587                 } else {
 588                         if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
 589                                 create_struct_type(&entry_type->compound, irtype, &offset,
 590                                                    &align_all);
 591                                 continue;
 592                         } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
 593                                 create_union_type(&entry_type->compound, irtype, &offset,
 594                                                   &align_all);
 595                                 continue;
 596                         } else {
 597                                 assert(entry_type->kind == TYPE_BITFIELD);
 598                         }
 599                         ident = unique_ident("anon");
 600                 }
 601
 602                 ir_type *base_irtype;
 603                 if(entry_type->kind == TYPE_BITFIELD) {
 604                         base_irtype = get_ir_type(entry_type->bitfield.base);
 605                 } else {
 606                         base_irtype = get_ir_type(entry_type);
 607                 }
 608
 609                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 610                 size_t misalign        = offset % entry_alignment;
 611
 612                 ir_type   *entry_irtype = get_ir_type(entry_type);
 613                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 614
 615                 size_t base;
 616                 size_t bits_remainder;
 617                 if(entry_type->kind == TYPE_BITFIELD) {
 618                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 619                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 620
 621                         if(size_bits > rest_size_bits) {
 622                                 /* start a new bucket */
 623                                 offset     += entry_alignment - misalign;
 624                                 bit_offset  = 0;
 625
 626                                 base           = offset;
 627                                 bits_remainder = 0;
 628                         } else {
 629                                 /* put into current bucket */
 630                                 base           = offset - misalign;
 631                                 bits_remainder = misalign * 8 + bit_offset;
 632                         }
 633
 634                         offset     += size_bits / 8;
 635                         bit_offset  = bit_offset + (size_bits % 8);
 636                 } else {
 637                         size_t entry_size = get_type_size_bytes(base_irtype);
 638                         if(misalign > 0 || bit_offset > 0)
 639                                 offset += entry_alignment - misalign;
 640
 641                         base           = offset;
 642                         bits_remainder = 0;
 643                         offset        += entry_size;
 644                         bit_offset     = 0;
 645                 }
 646
 647                 if(entry_alignment > align_all) {
 648                         if(entry_alignment % align_all != 0) {
 649                                 panic("uneven alignments not supported yet");
 650                         }
 651                         align_all = entry_alignment;
 652                 }
 653
 654                 set_entity_offset(entity, base);
 655                 set_entity_offset_bits_remainder(entity,
 656                                                  (unsigned char) bits_remainder);
 657                 //add_struct_member(irtype, entity);
 658                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 659                 assert(entry->v.entity == NULL);
 660                 entry->v.entity         = entity;
 661         }
 662
 663         size_t misalign = offset % align_all;
 664         if(misalign > 0 || bit_offset > 0) {
 665                 offset += align_all - misalign;
 666         }
 667
 668         if(outer_offset != NULL) {
 669                 *outer_offset = offset;
 670                 *outer_align  = align_all;
 671         } else {
 672                 set_type_alignment_bytes(irtype, align_all);
 673                 set_type_size_bytes(irtype, offset);
 674                 set_type_state(irtype, layout_fixed);
 675         }
 676
 677         return irtype;
 678 }
 679
 680 static ir_type *create_union_type(compound_type_t *type, ir_type *irtype,
 681                                   size_t *outer_offset, size_t *outer_align)
 682 {
 683         declaration_t *declaration = type->declaration;
 684         if(declaration->v.irtype != NULL) {
 685                 return declaration->v.irtype;
 686         }
 687
 688         size_t offset    = 0;
 689         size_t align_all = 1;
 690         size_t size      = 0;
 691
 692         if(irtype == NULL) {
 693                 symbol_t      *symbol      = declaration->symbol;
 694                 ident         *id;
 695                 if(symbol != NULL) {
 696                         id = unique_ident(symbol->string);
 697                 } else {
 698                         id = unique_ident("__anonymous_union");
 699                 }
 700                 dbg_info *dbgi = get_dbg_info(&type->type.source_position);
 701
 702                 irtype = new_d_type_union(id, dbgi);
 703         } else {
 704                 offset    = *outer_offset;
 705                 align_all = *outer_align;
 706         }
 707
 708         type->type.firm_type = irtype;
 709
 710         declaration_t *entry = declaration->scope.declarations;
 711         for( ; entry != NULL; entry = entry->next) {
 712                 if(entry->namespc != NAMESPACE_NORMAL)
 713                         continue;
 714
 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(entry->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    = get_ir_mode((type_t*) type);
 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 /**
2261  * Transform a sizeof expression into Firm code.
2262  */
2263 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2264 {
2265         type_t *type = expression->type;
2266         if(type == NULL) {
2267                 type = expression->tp_expression->base.type;
2268                 assert(type != NULL);
2269         }
2270
2271         ir_mode *const mode = get_ir_mode(expression->base.type);
2272         symconst_symbol sym;
2273         sym.type_p = get_ir_type(type);
2274         return new_SymConst(mode, sym, symconst_type_size);
2275 }
2276
2277 /**
2278  * Transform an alignof expression into Firm code.
2279  */
2280 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2281 {
2282         type_t *type = expression->type;
2283         if(type == NULL) {
2284                 /* beware: if expression is a variable reference, return the
2285                    alignment of the variable. */
2286                 const expression_t *tp_expression = expression->tp_expression;
2287                 const declaration_t *declaration = expr_is_variable(tp_expression);
2288                 if (declaration != NULL) {
2289                         /* TODO: get the alignment of this variable. */
2290                 }
2291                 type = tp_expression->base.type;
2292                 assert(type != NULL);
2293         }
2294
2295         ir_mode *const mode = get_ir_mode(expression->base.type);
2296         symconst_symbol sym;
2297         sym.type_p = get_ir_type(type);
2298         return new_SymConst(mode, sym, symconst_type_align);
2299 }
2300
2301 static long fold_constant(const expression_t *expression)
2302 {
2303         assert(is_constant_expression(expression));
2304
2305         ir_graph *old_current_ir_graph = current_ir_graph;
2306         if(current_ir_graph == NULL) {
2307                 current_ir_graph = get_const_code_irg();
2308         }
2309
2310         ir_node *cnst = expression_to_firm(expression);
2311         current_ir_graph = old_current_ir_graph;
2312
2313         if(!is_Const(cnst)) {
2314                 panic("couldn't fold constant\n");
2315         }
2316
2317         tarval *tv = get_Const_tarval(cnst);
2318         if(!tarval_is_long(tv)) {
2319                 panic("result of constant folding is not integer\n");
2320         }
2321
2322         return get_tarval_long(tv);
2323 }
2324
2325 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2326 {
2327         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2328
2329         /* first try to fold a constant condition */
2330         if(is_constant_expression(expression->condition)) {
2331                 long val = fold_constant(expression->condition);
2332                 if(val) {
2333                         return expression_to_firm(expression->true_expression);
2334                 } else {
2335                         return expression_to_firm(expression->false_expression);
2336                 }
2337         }
2338
2339         ir_node *cur_block   = get_cur_block();
2340
2341         /* create the true block */
2342         ir_node *true_block  = new_immBlock();
2343
2344         ir_node *true_val = expression_to_firm(expression->true_expression);
2345         ir_node *true_jmp = new_Jmp();
2346
2347         /* create the false block */
2348         ir_node *false_block = new_immBlock();
2349
2350         ir_node *false_val = expression_to_firm(expression->false_expression);
2351         ir_node *false_jmp = new_Jmp();
2352
2353         /* create the condition evaluation */
2354         set_cur_block(cur_block);
2355         create_condition_evaluation(expression->condition, true_block, false_block);
2356         mature_immBlock(true_block);
2357         mature_immBlock(false_block);
2358
2359         /* create the common block */
2360         ir_node *common_block = new_immBlock();
2361         add_immBlock_pred(common_block, true_jmp);
2362         add_immBlock_pred(common_block, false_jmp);
2363         mature_immBlock(common_block);
2364
2365         /* TODO improve static semantics, so either both or no values are NULL */
2366         if (true_val == NULL || false_val == NULL)
2367                 return NULL;
2368
2369         ir_node *in[2] = { true_val, false_val };
2370         ir_mode *mode  = get_irn_mode(true_val);
2371         assert(get_irn_mode(false_val) == mode);
2372         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2373
2374         return val;
2375 }
2376
2377 static ir_node *select_addr(const select_expression_t *expression)
2378 {
2379         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2380
2381         ir_node *compound_addr = expression_to_firm(expression->compound);
2382
2383         declaration_t *entry = expression->compound_entry;
2384         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2385         ir_entity     *entity = entry->v.entity;
2386
2387         assert(entity != NULL);
2388
2389         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2390
2391         return sel;
2392 }
2393
2394 static ir_node *select_to_firm(const select_expression_t *expression)
2395 {
2396         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2397         ir_node  *addr   = select_addr(expression);
2398         type_t   *type   = revert_automatic_type_conversion(
2399                         (const expression_t*) expression);
2400         type             = skip_typeref(type);
2401         ir_type  *irtype = get_ir_type(type);
2402
2403         return deref_address(irtype, addr, dbgi);
2404 }
2405
2406 /* Values returned by __builtin_classify_type. */
2407 typedef enum gcc_type_class
2408 {
2409         no_type_class = -1,
2410         void_type_class,
2411         integer_type_class,
2412         char_type_class,
2413         enumeral_type_class,
2414         boolean_type_class,
2415         pointer_type_class,
2416         reference_type_class,
2417         offset_type_class,
2418         real_type_class,
2419         complex_type_class,
2420         function_type_class,
2421         method_type_class,
2422         record_type_class,
2423         union_type_class,
2424         array_type_class,
2425         string_type_class,
2426         set_type_class,
2427         file_type_class,
2428         lang_type_class
2429 } gcc_type_class;
2430
2431 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2432 {
2433         const type_t *const type = expr->type_expression->base.type;
2434
2435         gcc_type_class tc;
2436         switch (type->kind)
2437         {
2438                 case TYPE_ATOMIC: {
2439                         const atomic_type_t *const atomic_type = &type->atomic;
2440                         switch (atomic_type->akind) {
2441                                 /* should not be reached */
2442                                 case ATOMIC_TYPE_INVALID:
2443                                         tc = no_type_class;
2444                                         break;
2445
2446                                 /* gcc cannot do that */
2447                                 case ATOMIC_TYPE_VOID:
2448                                         tc = void_type_class;
2449                                         break;
2450
2451                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2452                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2453                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2454                                 case ATOMIC_TYPE_SHORT:
2455                                 case ATOMIC_TYPE_USHORT:
2456                                 case ATOMIC_TYPE_INT:
2457                                 case ATOMIC_TYPE_UINT:
2458                                 case ATOMIC_TYPE_LONG:
2459                                 case ATOMIC_TYPE_ULONG:
2460                                 case ATOMIC_TYPE_LONGLONG:
2461                                 case ATOMIC_TYPE_ULONGLONG:
2462                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2463                                         tc = integer_type_class;
2464                                         break;
2465
2466                                 case ATOMIC_TYPE_FLOAT:
2467                                 case ATOMIC_TYPE_DOUBLE:
2468                                 case ATOMIC_TYPE_LONG_DOUBLE:
2469                                         tc = real_type_class;
2470                                         break;
2471
2472 #ifdef PROVIDE_COMPLEX
2473                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
2474                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
2475                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
2476                                         tc = complex_type_class;
2477                                         break;
2478                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
2479                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
2480                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
2481                                         tc = complex_type_class;
2482                                         break;
2483 #endif
2484
2485                                 default:
2486                                         panic("Unimplemented case in classify_type_to_firm().");
2487                         }
2488                         break;
2489                 }
2490
2491                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2492                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2493                 case TYPE_POINTER:         tc = pointer_type_class; break;
2494                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
2495                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
2496
2497                 /* gcc handles this as integer */
2498                 case TYPE_ENUM:            tc = integer_type_class; break;
2499
2500                 default:
2501                         panic("Unimplemented case in classify_type_to_firm().");
2502         }
2503
2504         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2505         ir_mode  *const mode = mode_int;
2506         tarval   *const tv   = new_tarval_from_long(tc, mode);
2507         return new_d_Const(dbgi, mode, tv);
2508 }
2509
2510 static ir_node *function_name_to_firm(
2511                 const string_literal_expression_t *const expr)
2512 {
2513         if (current_function_name == NULL) {
2514                 const source_position_t *const src_pos = &expr->base.source_position;
2515                 const char *const name = current_function_decl->symbol->string;
2516                 const string_t string = { name, strlen(name) + 1 };
2517                 current_function_name = string_to_firm(src_pos, "__func__", &string);
2518         }
2519
2520         return current_function_name;
2521 }
2522
2523 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2524 {
2525         statement_t *statement = expr->statement;
2526
2527         assert(statement->kind == STATEMENT_COMPOUND);
2528         return compound_statement_to_firm(&statement->compound);
2529 }
2530
2531 static ir_node *va_start_expression_to_firm(
2532         const va_start_expression_t *const expr)
2533 {
2534         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2535         int        const n           = get_method_n_params(method_type) - 1;
2536         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2537         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2538         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2539         ir_node   *const no_mem      = new_NoMem();
2540         ir_node   *const arg_sel     =
2541                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2542
2543         size_t     const parm_size   = get_type_size(expr->parameter->type);
2544         ir_node   *const cnst        = new_Const_long(mode_uint, parm_size);
2545         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2546         set_value_for_expression(expr->ap, add);
2547
2548         return NULL;
2549 }
2550
2551 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2552 {
2553         ir_type  *const irtype = get_ir_type(expr->base.type);
2554         ir_node  *const ap     = expression_to_firm(expr->ap);
2555         dbg_info *const dbgi   = get_dbg_info(&expr->base.source_position);
2556         ir_node  *const res    = deref_address(irtype, ap, dbgi);
2557
2558         size_t    const parm_size = get_type_size(expr->base.type);
2559         ir_node  *const cnst      = new_Const_long(mode_uint, parm_size);
2560         ir_node  *const add       = new_d_Add(dbgi, ap, cnst, mode_P_data);
2561         set_value_for_expression(expr->ap, add);
2562
2563         return res;
2564 }
2565
2566 static ir_node *dereference_addr(const unary_expression_t *const expression)
2567 {
2568         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2569         return expression_to_firm(expression->value);
2570 }
2571
2572 static ir_node *expression_to_addr(const expression_t *expression)
2573 {
2574         switch(expression->kind) {
2575         case EXPR_REFERENCE:
2576                 return reference_addr(&expression->reference);
2577         case EXPR_ARRAY_ACCESS:
2578                 return array_access_addr(&expression->array_access);
2579         case EXPR_SELECT:
2580                 return select_addr(&expression->select);
2581         case EXPR_CALL:
2582                 return call_expression_to_firm(&expression->call);
2583         case EXPR_UNARY_DEREFERENCE: {
2584                 return dereference_addr(&expression->unary);
2585         }
2586         default:
2587                 break;
2588         }
2589         panic("trying to get address of non-lvalue");
2590 }
2591
2592 static ir_node *builtin_constant_to_firm(
2593                 const builtin_constant_expression_t *expression)
2594 {
2595         ir_mode *mode = get_ir_mode(expression->base.type);
2596         long     v;
2597
2598         if (is_constant_expression(expression->value)) {
2599                 v = 1;
2600         } else {
2601                 v = 0;
2602         }
2603         return new_Const_long(mode, v);
2604 }
2605
2606 static ir_node *builtin_prefetch_to_firm(
2607                 const builtin_prefetch_expression_t *expression)
2608 {
2609         ir_node *adr = expression_to_firm(expression->adr);
2610         /* no Firm support for prefetch yet */
2611         (void) adr;
2612         return NULL;
2613 }
2614
2615 static ir_node *_expression_to_firm(const expression_t *expression)
2616 {
2617         switch(expression->kind) {
2618         case EXPR_CHAR_CONST:
2619                 return char_const_to_firm(&expression->conste);
2620         case EXPR_CONST:
2621                 return const_to_firm(&expression->conste);
2622         case EXPR_STRING_LITERAL:
2623                 return string_literal_to_firm(&expression->string);
2624         case EXPR_WIDE_STRING_LITERAL:
2625                 return wide_string_literal_to_firm(&expression->wide_string);
2626         case EXPR_REFERENCE:
2627                 return reference_expression_to_firm(&expression->reference);
2628         case EXPR_CALL:
2629                 return call_expression_to_firm(&expression->call);
2630         EXPR_UNARY_CASES
2631                 return unary_expression_to_firm(&expression->unary);
2632         EXPR_BINARY_CASES
2633                 return binary_expression_to_firm(&expression->binary);
2634         case EXPR_ARRAY_ACCESS:
2635                 return array_access_to_firm(&expression->array_access);
2636         case EXPR_SIZEOF:
2637                 return sizeof_to_firm(&expression->typeprop);
2638         case EXPR_ALIGNOF:
2639                 return alignof_to_firm(&expression->typeprop);
2640         case EXPR_CONDITIONAL:
2641                 return conditional_to_firm(&expression->conditional);
2642         case EXPR_SELECT:
2643                 return select_to_firm(&expression->select);
2644         case EXPR_CLASSIFY_TYPE:
2645                 return classify_type_to_firm(&expression->classify_type);
2646         case EXPR_FUNCTION:
2647         case EXPR_PRETTY_FUNCTION:
2648                 return function_name_to_firm(&expression->string);
2649         case EXPR_STATEMENT:
2650                 return statement_expression_to_firm(&expression->statement);
2651         case EXPR_VA_START:
2652                 return va_start_expression_to_firm(&expression->va_starte);
2653         case EXPR_VA_ARG:
2654                 return va_arg_expression_to_firm(&expression->va_arge);
2655         case EXPR_OFFSETOF:
2656         case EXPR_BUILTIN_SYMBOL:
2657                 panic("unimplemented expression found");
2658         case EXPR_BUILTIN_CONSTANT_P:
2659                 return builtin_constant_to_firm(&expression->builtin_constant);
2660         case EXPR_BUILTIN_PREFETCH:
2661                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2662
2663         case EXPR_UNKNOWN:
2664         case EXPR_INVALID:
2665                 break;
2666         }
2667         panic("invalid expression found");
2668 }
2669
2670 static ir_node *expression_to_firm(const expression_t *expression)
2671 {
2672         ir_node *res = _expression_to_firm(expression);
2673
2674         if(res != NULL && get_irn_mode(res) == mode_b) {
2675                 ir_mode *mode = get_ir_mode(expression->base.type);
2676                 res           = create_conv(NULL, res, mode);
2677         }
2678
2679         return res;
2680 }
2681
2682 static ir_node *expression_to_modeb(const expression_t *expression)
2683 {
2684         ir_node *res = _expression_to_firm(expression);
2685         res          = create_conv(NULL, res, mode_b);
2686
2687         return res;
2688 }
2689
2690 /**
2691  * create a short-circuit expression evaluation that tries to construct
2692  * efficient control flow structures for &&, || and ! expressions
2693  */
2694 static void create_condition_evaluation(const expression_t *expression,
2695                                         ir_node *true_block,
2696                                         ir_node *false_block)
2697 {
2698         switch(expression->kind) {
2699         case EXPR_UNARY_NOT: {
2700                 const unary_expression_t *unary_expression = &expression->unary;
2701                 create_condition_evaluation(unary_expression->value, false_block,
2702                                             true_block);
2703                 return;
2704         }
2705         case EXPR_BINARY_LOGICAL_AND: {
2706                 const binary_expression_t *binary_expression = &expression->binary;
2707
2708                 ir_node *cur_block   = get_cur_block();
2709                 ir_node *extra_block = new_immBlock();
2710                 set_cur_block(cur_block);
2711                 create_condition_evaluation(binary_expression->left, extra_block,
2712                                             false_block);
2713                 mature_immBlock(extra_block);
2714                 set_cur_block(extra_block);
2715                 create_condition_evaluation(binary_expression->right, true_block,
2716                                             false_block);
2717                 return;
2718         }
2719         case EXPR_BINARY_LOGICAL_OR: {
2720                 const binary_expression_t *binary_expression = &expression->binary;
2721
2722                 ir_node *cur_block   = get_cur_block();
2723                 ir_node *extra_block = new_immBlock();
2724                 set_cur_block(cur_block);
2725                 create_condition_evaluation(binary_expression->left, true_block,
2726                                             extra_block);
2727                 mature_immBlock(extra_block);
2728                 set_cur_block(extra_block);
2729                 create_condition_evaluation(binary_expression->right, true_block,
2730                                             false_block);
2731                 return;
2732         }
2733         default:
2734                 break;
2735         }
2736
2737         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
2738         ir_node  *condition  = expression_to_modeb(expression);
2739         ir_node  *cond       = new_d_Cond(dbgi, condition);
2740         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2741         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2742
2743         /* set branch prediction info based on __builtin_expect */
2744         if(expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
2745                 long               cnst = fold_constant(expression->binary.right);
2746                 cond_jmp_predicate pred;
2747
2748                 if(cnst == 0) {
2749                         pred = COND_JMP_PRED_FALSE;
2750                 } else {
2751                         pred = COND_JMP_PRED_TRUE;
2752                 }
2753                 set_Cond_jmp_pred(cond, pred);
2754         }
2755
2756         add_immBlock_pred(true_block, true_proj);
2757         add_immBlock_pred(false_block, false_proj);
2758
2759         set_cur_block(NULL);
2760 }
2761
2762
2763
2764 static void create_declaration_entity(declaration_t *declaration,
2765                                       declaration_kind_t declaration_kind,
2766                                       ir_type *parent_type)
2767 {
2768         ident     *const id     = new_id_from_str(declaration->symbol->string);
2769         ir_type   *const irtype = get_ir_type(declaration->type);
2770         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
2771         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
2772         set_entity_ld_ident(entity, id);
2773
2774         declaration->declaration_kind = (unsigned char) declaration_kind;
2775         declaration->v.entity         = entity;
2776         set_entity_variability(entity, variability_uninitialized);
2777         if(parent_type == get_tls_type())
2778                 set_entity_allocation(entity, allocation_automatic);
2779         else if(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
2780                 set_entity_allocation(entity, allocation_static);
2781         /* TODO: visibility? */
2782 }
2783
2784 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
2785
2786 enum compound_graph_entry_type_t {
2787         COMPOUND_GRAPH_ENTRY_ARRAY,
2788         COMPOUND_GRAPH_ENTRY_COMPOUND
2789 };
2790
2791 struct compound_graph_path_entry_t {
2792         int type;
2793         union {
2794                 ir_entity *entity;
2795                 int        array_index;
2796         } v;
2797         compound_graph_path_entry_t *prev;
2798 };
2799
2800 static void create_initializer_object(initializer_t *initializer, type_t *type,
2801                 ir_entity *entity, compound_graph_path_entry_t *entry, int len);
2802
2803 static compound_graph_path *create_compound_path(ir_type *type,
2804                 compound_graph_path_entry_t *entry, int len)
2805 {
2806         compound_graph_path *path = new_compound_graph_path(type, len);
2807
2808         int i = len - 1;
2809         for( ; entry != NULL; entry = entry->prev, --i) {
2810                 assert(i >= 0);
2811                 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
2812                         set_compound_graph_path_node(path, i, entry->v.entity);
2813                 } else {
2814                         assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
2815                         set_compound_graph_path_array_index(path, i, entry->v.array_index);
2816                 }
2817         }
2818         assert(i == -1);
2819
2820         return path;
2821 }
2822
2823 static void create_initializer_value(initializer_value_t *initializer,
2824                                      ir_entity *entity,
2825                                      compound_graph_path_entry_t *entry,
2826                                      int len)
2827 {
2828         ir_node             *node = expression_to_firm(initializer->value);
2829         ir_type             *type = get_entity_type(entity);
2830         compound_graph_path *path = create_compound_path(type, entry, len);
2831         add_compound_ent_value_w_path(entity, node, path);
2832 }
2833
2834 static void create_initializer_compound(initializer_list_t *initializer,
2835                                         compound_type_t *type,
2836                                         ir_entity *entity,
2837                                         compound_graph_path_entry_t *last_entry,
2838                                         int len)
2839 {
2840         declaration_t *compound_declaration = type->declaration;
2841
2842         declaration_t *compound_entry = compound_declaration->scope.declarations;
2843
2844         compound_graph_path_entry_t entry;
2845         entry.type = COMPOUND_GRAPH_ENTRY_COMPOUND;
2846         entry.prev = last_entry;
2847         ++len;
2848
2849         size_t i = 0;
2850         for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
2851                 if(compound_entry->symbol == NULL)
2852                         continue;
2853                 if(compound_entry->namespc != NAMESPACE_NORMAL)
2854                         continue;
2855
2856                 if(i >= initializer->len)
2857                         break;
2858
2859                 entry.v.entity = compound_entry->v.entity;
2860
2861                 initializer_t *sub_initializer = initializer->initializers[i];
2862
2863                 assert(compound_entry != NULL);
2864                 assert(compound_entry->declaration_kind
2865                                 == DECLARATION_KIND_COMPOUND_MEMBER);
2866
2867                 if(sub_initializer->kind == INITIALIZER_VALUE) {
2868                         create_initializer_value(&sub_initializer->value,
2869                                                  entity, &entry, len);
2870                 } else {
2871                         type_t *entry_type = skip_typeref(compound_entry->type);
2872                         create_initializer_object(sub_initializer, entry_type, entity,
2873                                                   &entry, len);
2874                 }
2875
2876                 ++i;
2877         }
2878 }
2879
2880 static void create_initializer_array(initializer_list_t *initializer,
2881                                      array_type_t *type, ir_entity *entity,
2882                                      compound_graph_path_entry_t *last_entry,
2883                                      int len)
2884 {
2885         type_t *element_type = type->element_type;
2886         element_type         = skip_typeref(element_type);
2887
2888         compound_graph_path_entry_t entry;
2889         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2890         entry.prev = last_entry;
2891         ++len;
2892
2893         size_t i;
2894         for(i = 0; i < initializer->len; ++i) {
2895                 entry.v.array_index = i;
2896
2897                 initializer_t *sub_initializer = initializer->initializers[i];
2898
2899                 if(sub_initializer->kind == INITIALIZER_VALUE) {
2900                         create_initializer_value(&sub_initializer->value,
2901                                                  entity, &entry, len);
2902                 } else {
2903                         create_initializer_object(sub_initializer, element_type, entity,
2904                                                   &entry, len);
2905                 }
2906         }
2907
2908 #if 0
2909         /* TODO: initialize rest... */
2910         if(type->size_expression != NULL) {
2911                 size_t array_len = fold_constant(type->size_expression);
2912                 for( ; i < array_len; ++i) {
2913
2914                 }
2915         }
2916 #endif
2917 }
2918
2919 static void create_initializer_string(initializer_string_t *initializer,
2920                                       array_type_t *type, ir_entity *entity,
2921                                       compound_graph_path_entry_t *last_entry,
2922                                       int len)
2923 {
2924         type_t *element_type = type->element_type;
2925         element_type         = skip_typeref(element_type);
2926
2927         compound_graph_path_entry_t entry;
2928         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2929         entry.prev = last_entry;
2930         ++len;
2931
2932         ir_type    *const irtype  = get_entity_type(entity);
2933         size_t            arr_len = get_array_type_size(type);
2934         const char *const p       = initializer->string.begin;
2935         if (initializer->string.size < arr_len) {
2936                 arr_len = initializer->string.size;
2937         }
2938         for (size_t i = 0; i < arr_len; ++i) {
2939                 entry.v.array_index = i;
2940
2941                 ir_node             *node = new_Const_long(mode_Bs, p[i]);
2942                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2943                 add_compound_ent_value_w_path(entity, node, path);
2944         }
2945 }
2946
2947 static void create_initializer_wide_string(
2948         const initializer_wide_string_t *const initializer, array_type_t *const type,
2949         ir_entity *const entity, compound_graph_path_entry_t *const last_entry,
2950         int len)
2951 {
2952         type_t *element_type = type->element_type;
2953         element_type         = skip_typeref(element_type);
2954
2955         compound_graph_path_entry_t entry;
2956         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2957         entry.prev = last_entry;
2958         ++len;
2959
2960         ir_type           *const irtype  = get_entity_type(entity);
2961         const size_t             arr_len = get_array_type_size(type);
2962         const wchar_rep_t *      p       = initializer->string.begin;
2963         const wchar_rep_t *const end     = p + initializer->string.size;
2964         for (size_t i = 0; i < arr_len && p != end; ++i, ++p) {
2965                 entry.v.array_index = i;
2966
2967                 ir_node             *node = new_Const_long(mode_int, *p);
2968                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2969                 add_compound_ent_value_w_path(entity, node, path);
2970         }
2971 }
2972
2973 static void create_initializer_object(initializer_t *initializer, type_t *type,
2974                 ir_entity *entity, compound_graph_path_entry_t *entry, int len)
2975 {
2976         if(is_type_array(type)) {
2977                 array_type_t *array_type = &type->array;
2978
2979                 switch (initializer->kind) {
2980                         case INITIALIZER_STRING: {
2981                                 initializer_string_t *const string = &initializer->string;
2982                                 create_initializer_string(string, array_type, entity, entry, len);
2983                                 return;
2984                         }
2985
2986                         case INITIALIZER_WIDE_STRING: {
2987                                 initializer_wide_string_t *const string = &initializer->wide_string;
2988                                 create_initializer_wide_string(string, array_type, entity, entry, len);
2989                                 return;
2990                         }
2991
2992                         case INITIALIZER_LIST: {
2993                                 initializer_list_t *const list = &initializer->list;
2994                                 create_initializer_array(list, array_type, entity, entry, len);
2995                                 return;
2996                         }
2997
2998                         case INITIALIZER_VALUE:
2999                                 break;
3000                 }
3001                 panic("Unhandled initializer");
3002         } else {
3003                 assert(initializer->kind == INITIALIZER_LIST);
3004                 initializer_list_t *list = &initializer->list;
3005
3006                 assert(is_type_compound(type));
3007                 compound_type_t *compound_type = &type->compound;
3008                 create_initializer_compound(list, compound_type, entity, entry, len);
3009         }
3010 }
3011
3012 static void create_initializer_local_variable_entity(declaration_t *declaration)
3013 {
3014         initializer_t *initializer = declaration->init.initializer;
3015         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3016         ir_entity     *entity      = declaration->v.entity;
3017         ir_node       *memory      = get_store();
3018         ir_node       *nomem       = new_NoMem();
3019         ir_node       *frame       = get_irg_frame(current_ir_graph);
3020         ir_node       *addr        = new_d_simpleSel(dbgi, nomem, frame, entity);
3021
3022         if(initializer->kind == INITIALIZER_VALUE) {
3023                 initializer_value_t *initializer_value = &initializer->value;
3024
3025                 ir_node *value = expression_to_firm(initializer_value->value);
3026                 type_t  *type  = skip_typeref(declaration->type);
3027                 assign_value(dbgi, addr, type, value);
3028                 return;
3029         }
3030
3031         /* create a "template" entity which is copied to the entity on the stack */
3032         ident     *const id          = unique_ident("initializer");
3033         ir_type   *const irtype      = get_ir_type(declaration->type);
3034         ir_type   *const global_type = get_glob_type();
3035         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3036         set_entity_ld_ident(init_entity, id);
3037
3038         set_entity_variability(init_entity, variability_initialized);
3039         set_entity_visibility(init_entity, visibility_local);
3040         set_entity_allocation(init_entity, allocation_static);
3041
3042         ir_graph *const old_current_ir_graph = current_ir_graph;
3043         current_ir_graph = get_const_code_irg();
3044
3045         type_t *const type = skip_typeref(declaration->type);
3046         create_initializer_object(initializer, type, init_entity, NULL, 0);
3047
3048         assert(current_ir_graph == get_const_code_irg());
3049         current_ir_graph = old_current_ir_graph;
3050
3051         ir_node *const src_addr  = create_symconst(dbgi, mode_P_data, init_entity);
3052         ir_node *const copyb     = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3053
3054         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3055         set_store(copyb_mem);
3056 }
3057
3058 static void create_initializer(declaration_t *declaration)
3059 {
3060         initializer_t *initializer = declaration->init.initializer;
3061         if(initializer == NULL)
3062                 return;
3063
3064         declaration_kind_t declaration_kind
3065                 = (declaration_kind_t) declaration->declaration_kind;
3066         if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3067                 create_initializer_local_variable_entity(declaration);
3068                 return;
3069         }
3070
3071         if(initializer->kind == INITIALIZER_VALUE) {
3072                 initializer_value_t *initializer_value = &initializer->value;
3073
3074                 ir_node *value = expression_to_firm(initializer_value->value);
3075
3076                 if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3077                         set_value(declaration->v.value_number, value);
3078                 } else {
3079                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3080
3081                         ir_entity *entity = declaration->v.entity;
3082
3083                         set_entity_variability(entity, variability_initialized);
3084                         set_atomic_ent_value(entity, value);
3085                 }
3086         } else {
3087                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3088                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3089
3090                 ir_entity *entity = declaration->v.entity;
3091                 set_entity_variability(entity, variability_initialized);
3092
3093                 type_t *type = skip_typeref(declaration->type);
3094                 create_initializer_object(initializer, type, entity, NULL, 0);
3095         }
3096 }
3097
3098 /**
3099  * Creates a Firm local variable from a declaration.
3100  */
3101 static void create_local_variable(declaration_t *declaration)
3102 {
3103         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3104
3105         bool needs_entity = declaration->address_taken;
3106         type_t *type = skip_typeref(declaration->type);
3107
3108         if(is_type_array(type) || is_type_compound(type)) {
3109                 needs_entity = true;
3110         }
3111
3112         if(needs_entity) {
3113                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3114                 create_declaration_entity(declaration,
3115                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3116                                           frame_type);
3117         } else {
3118                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3119                 declaration->v.value_number   = next_value_number_function;
3120                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3121                 ++next_value_number_function;
3122         }
3123
3124         create_initializer(declaration);
3125 }
3126
3127 static void create_local_static_variable(declaration_t *declaration)
3128 {
3129         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3130
3131         type_t    *const type        = skip_typeref(declaration->type);
3132         ir_type   *const global_type = get_glob_type();
3133         ident     *const id          = unique_ident(declaration->symbol->string);
3134         ir_type   *const irtype      = get_ir_type(type);
3135         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3136         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3137         set_entity_ld_ident(entity, id);
3138
3139         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3140         declaration->v.entity         = entity;
3141         set_entity_variability(entity, variability_uninitialized);
3142         set_entity_visibility(entity, visibility_local);
3143         set_entity_allocation(entity, allocation_static);
3144
3145         ir_graph *const old_current_ir_graph = current_ir_graph;
3146         current_ir_graph = get_const_code_irg();
3147
3148         create_initializer(declaration);
3149
3150         assert(current_ir_graph == get_const_code_irg());
3151         current_ir_graph = old_current_ir_graph;
3152 }
3153
3154
3155
3156 static void return_statement_to_firm(return_statement_t *statement)
3157 {
3158         if(get_cur_block() == NULL)
3159                 return;
3160
3161         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3162         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3163
3164
3165         ir_node *in[1];
3166         int      in_len;
3167         if(get_method_n_ress(func_irtype) > 0) {
3168                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3169
3170                 if(statement->value != NULL) {
3171                         ir_node *node = expression_to_firm(statement->value);
3172                         node  = do_strict_conv(dbgi, node);
3173                         in[0] = node;
3174                 } else {
3175                         ir_mode *mode;
3176                         if(is_compound_type(res_type)) {
3177                                 mode = mode_P_data;
3178                         } else {
3179                                 mode = get_type_mode(res_type);
3180                         }
3181                         in[0] = new_Unknown(mode);
3182                 }
3183                 in_len = 1;
3184         } else {
3185                 /* build return_value for its side effects */
3186                 if(statement->value != NULL) {
3187                         expression_to_firm(statement->value);
3188                 }
3189                 in_len = 0;
3190         }
3191
3192         ir_node  *store = get_store();
3193         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
3194
3195         ir_node *end_block = get_irg_end_block(current_ir_graph);
3196         add_immBlock_pred(end_block, ret);
3197
3198         set_cur_block(NULL);
3199 }
3200
3201 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3202 {
3203         if(get_cur_block() == NULL)
3204                 return NULL;
3205
3206         return expression_to_firm(statement->expression);
3207 }
3208
3209 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3210 {
3211         ir_node     *result    = NULL;
3212         statement_t *statement = compound->statements;
3213         for( ; statement != NULL; statement = statement->base.next) {
3214                 //context2firm(&statement->scope);
3215
3216                 if(statement->base.next == NULL
3217                                 && statement->kind == STATEMENT_EXPRESSION) {
3218                         result = expression_statement_to_firm(
3219                                         &statement->expression);
3220                         break;
3221                 }
3222                 statement_to_firm(statement);
3223         }
3224
3225         return result;
3226 }
3227
3228 static void create_local_declaration(declaration_t *declaration)
3229 {
3230         if(declaration->symbol == NULL)
3231                 return;
3232
3233         type_t *type = skip_typeref(declaration->type);
3234
3235         switch ((storage_class_tag_t) declaration->storage_class) {
3236         case STORAGE_CLASS_STATIC:
3237                 create_local_static_variable(declaration);
3238                 return;
3239         case STORAGE_CLASS_ENUM_ENTRY:
3240                 panic("enum entry declaration in local block found");
3241         case STORAGE_CLASS_EXTERN:
3242                 panic("extern declaration in local block found");
3243         case STORAGE_CLASS_NONE:
3244         case STORAGE_CLASS_AUTO:
3245         case STORAGE_CLASS_REGISTER:
3246                 if(is_type_function(type)) {
3247                         if(declaration->init.statement != NULL) {
3248                                 panic("nested functions not supported yet");
3249                         } else {
3250                                 get_function_entity(declaration);
3251                         }
3252                 } else {
3253                         create_local_variable(declaration);
3254                 }
3255                 return;
3256         case STORAGE_CLASS_TYPEDEF:
3257         case STORAGE_CLASS_THREAD:
3258         case STORAGE_CLASS_THREAD_EXTERN:
3259         case STORAGE_CLASS_THREAD_STATIC:
3260                 return;
3261         }
3262         panic("invalid storage class found");
3263 }
3264
3265 static void declaration_statement_to_firm(declaration_statement_t *statement)
3266 {
3267         declaration_t *declaration = statement->declarations_begin;
3268         declaration_t *end         = statement->declarations_end->next;
3269         for( ; declaration != end; declaration = declaration->next) {
3270                 if(declaration->namespc != NAMESPACE_NORMAL)
3271                         continue;
3272                 create_local_declaration(declaration);
3273         }
3274 }
3275
3276 static void if_statement_to_firm(if_statement_t *statement)
3277 {
3278         ir_node *cur_block = get_cur_block();
3279
3280         ir_node *fallthrough_block = new_immBlock();
3281
3282         /* the true (blocks) */
3283         ir_node *true_block;
3284         if (statement->true_statement != NULL) {
3285                 true_block = new_immBlock();
3286                 statement_to_firm(statement->true_statement);
3287                 if(get_cur_block() != NULL) {
3288                         ir_node *jmp = new_Jmp();
3289                         add_immBlock_pred(fallthrough_block, jmp);
3290                 }
3291         } else {
3292                 true_block = fallthrough_block;
3293         }
3294
3295         /* the false (blocks) */
3296         ir_node *false_block;
3297         if(statement->false_statement != NULL) {
3298                 false_block = new_immBlock();
3299
3300                 statement_to_firm(statement->false_statement);
3301                 if(get_cur_block() != NULL) {
3302                         ir_node *jmp = new_Jmp();
3303                         add_immBlock_pred(fallthrough_block, jmp);
3304                 }
3305         } else {
3306                 false_block = fallthrough_block;
3307         }
3308
3309         /* create the condition */
3310         if(cur_block != NULL) {
3311                 set_cur_block(cur_block);
3312                 create_condition_evaluation(statement->condition, true_block,
3313                                             false_block);
3314         }
3315
3316         mature_immBlock(true_block);
3317         if(false_block != fallthrough_block) {
3318                 mature_immBlock(false_block);
3319         }
3320         mature_immBlock(fallthrough_block);
3321
3322         set_cur_block(fallthrough_block);
3323 }
3324
3325 static void while_statement_to_firm(while_statement_t *statement)
3326 {
3327         ir_node *jmp = NULL;
3328         if(get_cur_block() != NULL) {
3329                 jmp = new_Jmp();
3330         }
3331
3332         /* create the header block */
3333         ir_node *header_block = new_immBlock();
3334         if(jmp != NULL) {
3335                 add_immBlock_pred(header_block, jmp);
3336         }
3337
3338         /* the false block */
3339         ir_node *false_block = new_immBlock();
3340
3341         /* the loop body */
3342         ir_node *body_block;
3343         if (statement->body != NULL) {
3344                 ir_node *old_continue_label = continue_label;
3345                 ir_node *old_break_label    = break_label;
3346                 continue_label              = header_block;
3347                 break_label                 = false_block;
3348
3349                 body_block = new_immBlock();
3350                 statement_to_firm(statement->body);
3351
3352                 assert(continue_label == header_block);
3353                 assert(break_label    == false_block);
3354                 continue_label = old_continue_label;
3355                 break_label    = old_break_label;
3356
3357                 if(get_cur_block() != NULL) {
3358                         jmp = new_Jmp();
3359                         add_immBlock_pred(header_block, jmp);
3360                 }
3361         } else {
3362                 body_block = header_block;
3363         }
3364
3365         /* create the condition */
3366         set_cur_block(header_block);
3367
3368         create_condition_evaluation(statement->condition, body_block, false_block);
3369         mature_immBlock(body_block);
3370         mature_immBlock(false_block);
3371         mature_immBlock(header_block);
3372
3373         set_cur_block(false_block);
3374 }
3375
3376 static void do_while_statement_to_firm(do_while_statement_t *statement)
3377 {
3378         ir_node *jmp = NULL;
3379         if(get_cur_block() != NULL) {
3380                 jmp = new_Jmp();
3381         }
3382
3383         /* create the header block */
3384         ir_node *header_block = new_immBlock();
3385
3386         /* the false block */
3387         ir_node *false_block = new_immBlock();
3388
3389         /* the loop body */
3390         ir_node *body_block = new_immBlock();
3391         if(jmp != NULL) {
3392                 add_immBlock_pred(body_block, jmp);
3393         }
3394
3395         if (statement->body != NULL) {
3396                 ir_node *old_continue_label = continue_label;
3397                 ir_node *old_break_label    = break_label;
3398                 continue_label              = header_block;
3399                 break_label                 = false_block;
3400
3401                 statement_to_firm(statement->body);
3402
3403                 assert(continue_label == header_block);
3404                 assert(break_label    == false_block);
3405                 continue_label = old_continue_label;
3406                 break_label    = old_break_label;
3407
3408                 if (get_cur_block() == NULL) {
3409                         mature_immBlock(header_block);
3410                         mature_immBlock(body_block);
3411                         mature_immBlock(false_block);
3412                         return;
3413                 }
3414         }
3415
3416         ir_node *body_jmp = new_Jmp();
3417         add_immBlock_pred(header_block, body_jmp);
3418         mature_immBlock(header_block);
3419
3420         /* create the condition */
3421         set_cur_block(header_block);
3422
3423         create_condition_evaluation(statement->condition, body_block, false_block);
3424         mature_immBlock(body_block);
3425         mature_immBlock(false_block);
3426         mature_immBlock(header_block);
3427
3428         set_cur_block(false_block);
3429 }
3430
3431 static void for_statement_to_firm(for_statement_t *statement)
3432 {
3433         ir_node *jmp = NULL;
3434         if (get_cur_block() != NULL) {
3435                 if(statement->initialisation != NULL) {
3436                         expression_to_firm(statement->initialisation);
3437                 }
3438
3439                 /* create declarations */
3440                 declaration_t *declaration = statement->scope.declarations;
3441                 for( ; declaration != NULL; declaration = declaration->next) {
3442                         create_local_declaration(declaration);
3443                 }
3444
3445                 jmp = new_Jmp();
3446         }
3447
3448
3449         /* create the step block */
3450         ir_node *const step_block = new_immBlock();
3451         if (statement->step != NULL) {
3452                 expression_to_firm(statement->step);
3453         }
3454         ir_node *const step_jmp = new_Jmp();
3455
3456         /* create the header block */
3457         ir_node *const header_block = new_immBlock();
3458         if (jmp != NULL) {
3459                 add_immBlock_pred(header_block, jmp);
3460         }
3461         add_immBlock_pred(header_block, step_jmp);
3462
3463         /* the false block */
3464         ir_node *const false_block = new_immBlock();
3465
3466         /* the loop body */
3467         ir_node * body_block;
3468         if (statement->body != NULL) {
3469                 ir_node *const old_continue_label = continue_label;
3470                 ir_node *const old_break_label    = break_label;
3471                 continue_label = step_block;
3472                 break_label    = false_block;
3473
3474                 body_block = new_immBlock();
3475                 statement_to_firm(statement->body);
3476
3477                 assert(continue_label == step_block);
3478                 assert(break_label    == false_block);
3479                 continue_label = old_continue_label;
3480                 break_label    = old_break_label;
3481
3482                 if (get_cur_block() != NULL) {
3483                         jmp = new_Jmp();
3484                         add_immBlock_pred(step_block, jmp);
3485                 }
3486         } else {
3487                 body_block = step_block;
3488         }
3489
3490         /* create the condition */
3491         set_cur_block(header_block);
3492         if (statement->condition != NULL) {
3493                 create_condition_evaluation(statement->condition, body_block,
3494                                             false_block);
3495         } else {
3496                 keep_alive(header_block);
3497                 jmp = new_Jmp();
3498                 add_immBlock_pred(body_block, jmp);
3499         }
3500
3501         mature_immBlock(body_block);
3502         mature_immBlock(false_block);
3503         mature_immBlock(step_block);
3504         mature_immBlock(header_block);
3505         mature_immBlock(false_block);
3506
3507         set_cur_block(false_block);
3508 }
3509
3510 static void create_jump_statement(const statement_t *statement,
3511                                   ir_node *target_block)
3512 {
3513         if(get_cur_block() == NULL)
3514                 return;
3515
3516         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
3517         ir_node  *jump = new_d_Jmp(dbgi);
3518         add_immBlock_pred(target_block, jump);
3519
3520         set_cur_block(NULL);
3521 }
3522
3523 static void switch_statement_to_firm(const switch_statement_t *statement)
3524 {
3525         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
3526
3527         ir_node *expression  = expression_to_firm(statement->expression);
3528         ir_node *cond        = new_d_Cond(dbgi, expression);
3529         ir_node *break_block = new_immBlock();
3530
3531         set_cur_block(NULL);
3532
3533         ir_node *const old_switch_cond       = current_switch_cond;
3534         ir_node *const old_break_label       = break_label;
3535         const bool     old_saw_default_label = saw_default_label;
3536         current_switch_cond                  = cond;
3537         break_label                          = break_block;
3538
3539         if (statement->body != NULL) {
3540                 statement_to_firm(statement->body);
3541         }
3542
3543         if(get_cur_block() != NULL) {
3544                 ir_node *jmp = new_Jmp();
3545                 add_immBlock_pred(break_block, jmp);
3546         }
3547
3548         if (!saw_default_label) {
3549                 set_cur_block(get_nodes_block(cond));
3550                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
3551                                                         MAGIC_DEFAULT_PN_NUMBER);
3552                 add_immBlock_pred(break_block, proj);
3553         }
3554
3555         assert(current_switch_cond == cond);
3556         assert(break_label         == break_block);
3557         current_switch_cond = old_switch_cond;
3558         break_label         = old_break_label;
3559         saw_default_label   = old_saw_default_label;
3560
3561         mature_immBlock(break_block);
3562         set_cur_block(break_block);
3563 }
3564
3565 static void case_label_to_firm(const case_label_statement_t *statement)
3566 {
3567         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
3568
3569         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
3570
3571         /* let's create a node and hope firm constant folding creates a Const
3572          * node... */
3573         ir_node *proj;
3574         ir_node *old_block = get_nodes_block(current_switch_cond);
3575         ir_node *block     = new_immBlock();
3576
3577         set_cur_block(old_block);
3578         if(statement->expression != NULL) {
3579                 long start_pn = fold_constant(statement->expression);
3580                 long end_pn = start_pn;
3581                 if (statement->end_range != NULL) {
3582                         end_pn = fold_constant(statement->end_range);
3583                 }
3584                 assert(start_pn <= end_pn);
3585                 /* create jumps for all cases in the given range */
3586                 for (long pn = start_pn; pn <= end_pn; ++pn) {
3587                         if(pn == MAGIC_DEFAULT_PN_NUMBER) {
3588                                 /* oops someone detected our cheating... */
3589                                 panic("magic default pn used");
3590                         }
3591                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
3592                         add_immBlock_pred(block, proj);
3593                 }
3594         } else {
3595                 saw_default_label = true;
3596                 proj = new_d_defaultProj(dbgi, current_switch_cond,
3597                                          MAGIC_DEFAULT_PN_NUMBER);
3598
3599                 add_immBlock_pred(block, proj);
3600         }
3601
3602         if (fallthrough != NULL) {
3603                 add_immBlock_pred(block, fallthrough);
3604         }
3605         mature_immBlock(block);
3606         set_cur_block(block);
3607
3608         if(statement->statement != NULL) {
3609                 statement_to_firm(statement->statement);
3610         }
3611 }
3612
3613 static ir_node *get_label_block(declaration_t *label)
3614 {
3615         assert(label->namespc == NAMESPACE_LABEL);
3616
3617         if(label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
3618                 return label->v.block;
3619         }
3620         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
3621
3622         ir_node *old_cur_block = get_cur_block();
3623         ir_node *block         = new_immBlock();
3624         set_cur_block(old_cur_block);
3625
3626         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
3627         label->v.block          = block;
3628
3629         ARR_APP1(ir_node *, imature_blocks, block);
3630
3631         return block;
3632 }
3633
3634 static void label_to_firm(const label_statement_t *statement)
3635 {
3636         ir_node *block = get_label_block(statement->label);
3637
3638         if(get_cur_block() != NULL) {
3639                 ir_node *jmp = new_Jmp();
3640                 add_immBlock_pred(block, jmp);
3641         }
3642
3643         set_cur_block(block);
3644         keep_alive(block);
3645
3646         if(statement->statement != NULL) {
3647                 statement_to_firm(statement->statement);
3648         }
3649 }
3650
3651 static void goto_to_firm(const goto_statement_t *statement)
3652 {
3653         if(get_cur_block() == NULL)
3654                 return;
3655
3656         ir_node *block = get_label_block(statement->label);
3657         ir_node *jmp   = new_Jmp();
3658         add_immBlock_pred(block, jmp);
3659
3660         set_cur_block(NULL);
3661 }
3662
3663 typedef enum modifier_t {
3664         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
3665         ASM_MODIFIER_READ_WRITE   = 1 << 1,
3666         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
3667         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
3668 } modifier_t;
3669
3670 static void asm_statement_to_firm(const asm_statement_t *statement)
3671 {
3672         (void) statement;
3673         fprintf(stderr, "WARNING asm not implemented yet!\n");
3674 #if 0
3675         bool needs_memory = false;
3676
3677         size_t         n_clobbers = 0;
3678         asm_clobber_t *clobber    = statement->clobbers;
3679         for( ; clobber != NULL; clobber = clobber->next) {
3680                 if(strcmp(clobber->clobber, "memory") == 0) {
3681                         needs_memory = true;
3682                         continue;
3683                 }
3684
3685                 ident *id = new_id_from_str(clobber->clobber);
3686                 obstack_ptr_grow(&asm_obst, id);
3687                 ++n_clobbers;
3688         }
3689         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
3690         ident **clobbers = NULL;
3691         if(n_clobbers > 0) {
3692                 clobbers = obstack_finish(&asm_obst);
3693         }
3694
3695         /* find and count input and output constraints */
3696         asm_constraint_t *constraint = statement->inputs;
3697         for( ; constraint != NULL; constraint = constraint->next) {
3698                 int  modifiers      = 0;
3699                 bool supports_memop = false;
3700                 for(const char *c = constraint->constraints; *c != 0; ++c) {
3701                         /* TODO: improve error messages */
3702                         switch(*c) {
3703                         case '?':
3704                         case '!':
3705                                 panic("multiple alternative assembler constraints not "
3706                                       "supported");
3707                         case 'm':
3708                         case 'o':
3709                         case 'V':
3710                         case '<':
3711                         case '>':
3712                         case 'X':
3713                                 supports_memop = true;
3714                                 obstack_1grow(&asm_obst, *c);
3715                                 break;
3716                         case '=':
3717                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
3718                                         panic("inconsistent register constraints");
3719                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
3720                                 break;
3721                         case '+':
3722                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
3723                                         panic("inconsistent register constraints");
3724                                 modifiers |= ASM_MODIFIER_READ_WRITE;
3725                                 break;
3726                         case '&':
3727                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
3728                                 panic("early clobber assembler constraint not supported yet");
3729                                 break;
3730                         case '%':
3731                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
3732                                 panic("commutative assembler constraint not supported yet");
3733                                 break;
3734                         case '#':
3735                                 /* skip register preferences stuff... */
3736                                 while(*c != 0 && *c != ',')
3737                                         ++c;
3738                                 break;
3739                         case '*':
3740                                 /* skip register preferences stuff... */
3741                                 ++c;
3742                                 break;
3743                         default:
3744                                 obstack_1grow(&asm_obst, *c);
3745                                 break;
3746                         }
3747                 }
3748                 obstack_1grow(&asm_obst, '\0');
3749                 const char *constraint_string = obstack_finish(&asm_obst);
3750
3751                 needs_memory |= supports_memop;
3752                 if(supports_memop) {
3753
3754                 }
3755         }
3756 #endif
3757 }
3758
3759 static void statement_to_firm(statement_t *statement)
3760 {
3761         switch(statement->kind) {
3762         case STATEMENT_INVALID:
3763                 panic("invalid statement found");
3764         case STATEMENT_COMPOUND:
3765                 compound_statement_to_firm(&statement->compound);
3766                 return;
3767         case STATEMENT_RETURN:
3768                 return_statement_to_firm(&statement->returns);
3769                 return;
3770         case STATEMENT_EXPRESSION:
3771                 expression_statement_to_firm(&statement->expression);
3772                 return;
3773         case STATEMENT_IF:
3774                 if_statement_to_firm(&statement->ifs);
3775                 return;
3776         case STATEMENT_WHILE:
3777                 while_statement_to_firm(&statement->whiles);
3778                 return;
3779         case STATEMENT_DO_WHILE:
3780                 do_while_statement_to_firm(&statement->do_while);
3781                 return;
3782         case STATEMENT_DECLARATION:
3783                 declaration_statement_to_firm(&statement->declaration);
3784                 return;
3785         case STATEMENT_BREAK:
3786                 create_jump_statement(statement, break_label);
3787                 return;
3788         case STATEMENT_CONTINUE:
3789                 create_jump_statement(statement, continue_label);
3790                 return;
3791         case STATEMENT_SWITCH:
3792                 switch_statement_to_firm(&statement->switchs);
3793                 return;
3794         case STATEMENT_CASE_LABEL:
3795                 case_label_to_firm(&statement->case_label);
3796                 return;
3797         case STATEMENT_FOR:
3798                 for_statement_to_firm(&statement->fors);
3799                 return;
3800         case STATEMENT_LABEL:
3801                 label_to_firm(&statement->label);
3802                 return;
3803         case STATEMENT_GOTO:
3804                 goto_to_firm(&statement->gotos);
3805                 return;
3806         case STATEMENT_ASM:
3807                 asm_statement_to_firm(&statement->asms);
3808                 return;
3809         }
3810         panic("Statement not implemented\n");
3811 }
3812
3813 static int count_decls_in_expression(const expression_t *expression);
3814
3815 static int count_local_declarations(const declaration_t *      decl,
3816                                     const declaration_t *const end)
3817 {
3818         int count = 0;
3819         for (; decl != end; decl = decl->next) {
3820                 if(decl->namespc != NAMESPACE_NORMAL)
3821                         continue;
3822                 const type_t *type = skip_typeref(decl->type);
3823                 if (!decl->address_taken && is_type_scalar(type))
3824                         ++count;
3825                 const initializer_t *initializer = decl->init.initializer;
3826                 /* FIXME: should walk initializer hierarchies... */
3827                 if(initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
3828                         count += count_decls_in_expression(initializer->value.value);
3829                 }
3830         }
3831         return count;
3832 }
3833
3834 static int count_decls_in_expression(const expression_t *expression) {
3835         if(expression == NULL)
3836                 return 0;
3837
3838         switch(expression->base.kind) {
3839         case EXPR_STATEMENT:
3840                 return count_decls_in_stmts(expression->statement.statement);
3841         EXPR_BINARY_CASES {
3842                 int count_left  = count_decls_in_expression(expression->binary.left);
3843                 int count_right = count_decls_in_expression(expression->binary.right);
3844                 return count_left + count_right;
3845         }
3846         EXPR_UNARY_CASES
3847                 return count_decls_in_expression(expression->unary.value);
3848         case EXPR_CALL: {
3849                 int count = 0;
3850                 call_argument_t *argument = expression->call.arguments;
3851                 for( ; argument != NULL; argument = argument->next) {
3852                         count += count_decls_in_expression(argument->expression);
3853                 }
3854                 return count;
3855         }
3856
3857         default:
3858                 break;
3859         }
3860
3861         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
3862          * (or implement all the missing expressions here/implement a walker)
3863          */
3864
3865         return 0;
3866 }
3867
3868 static int count_decls_in_stmts(const statement_t *stmt)
3869 {
3870         int count = 0;
3871         for (; stmt != NULL; stmt = stmt->base.next) {
3872                 switch (stmt->kind) {
3873                         case STATEMENT_DECLARATION: {
3874                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
3875                                 count += count_local_declarations(decl_stmt->declarations_begin,
3876                                                                   decl_stmt->declarations_end->next);
3877                                 break;
3878                         }
3879
3880                         case STATEMENT_COMPOUND: {
3881                                 const compound_statement_t *const comp =
3882                                         &stmt->compound;
3883                                 count += count_decls_in_stmts(comp->statements);
3884                                 break;
3885                         }
3886
3887                         case STATEMENT_IF: {
3888                                 const if_statement_t *const if_stmt = &stmt->ifs;
3889                                 count += count_decls_in_expression(if_stmt->condition);
3890                                 count += count_decls_in_stmts(if_stmt->true_statement);
3891                                 count += count_decls_in_stmts(if_stmt->false_statement);
3892                                 break;
3893                         }
3894
3895                         case STATEMENT_SWITCH: {
3896                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
3897                                 count += count_decls_in_expression(switch_stmt->expression);
3898                                 count += count_decls_in_stmts(switch_stmt->body);
3899                                 break;
3900                         }
3901
3902                         case STATEMENT_LABEL: {
3903                                 const label_statement_t *const label_stmt = &stmt->label;
3904                                 if(label_stmt->statement != NULL) {
3905                                         count += count_decls_in_stmts(label_stmt->statement);
3906                                 }
3907                                 break;
3908                         }
3909
3910                         case STATEMENT_WHILE: {
3911                                 const while_statement_t *const while_stmt = &stmt->whiles;
3912                                 count += count_decls_in_expression(while_stmt->condition);
3913                                 count += count_decls_in_stmts(while_stmt->body);
3914                                 break;
3915                         }
3916
3917                         case STATEMENT_DO_WHILE: {
3918                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
3919                                 count += count_decls_in_expression(do_while_stmt->condition);
3920                                 count += count_decls_in_stmts(do_while_stmt->body);
3921                                 break;
3922                         }
3923
3924                         case STATEMENT_FOR: {
3925                                 const for_statement_t *const for_stmt = &stmt->fors;
3926                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
3927                                 count += count_decls_in_expression(for_stmt->initialisation);
3928                                 count += count_decls_in_expression(for_stmt->condition);
3929                                 count += count_decls_in_expression(for_stmt->step);
3930                                 count += count_decls_in_stmts(for_stmt->body);
3931                                 break;
3932                         }
3933
3934                         case STATEMENT_CASE_LABEL: {
3935                                 const case_label_statement_t *label = &stmt->case_label;
3936                                 count += count_decls_in_expression(label->expression);
3937                                 if(label->statement != NULL) {
3938                                         count += count_decls_in_stmts(label->statement);
3939                                 }
3940                                 break;
3941                         }
3942
3943                         case STATEMENT_ASM:
3944                         case STATEMENT_BREAK:
3945                         case STATEMENT_CONTINUE:
3946                                 break;
3947
3948                         case STATEMENT_EXPRESSION: {
3949                                 const expression_statement_t *expr_stmt = &stmt->expression;
3950                                 count += count_decls_in_expression(expr_stmt->expression);
3951                                 break;
3952                         }
3953
3954                         case STATEMENT_GOTO:
3955                         case STATEMENT_INVALID:
3956                                 break;
3957
3958                         case STATEMENT_RETURN: {
3959                                 const return_statement_t *ret_stmt = &stmt->returns;
3960                                 count += count_decls_in_expression(ret_stmt->value);
3961                                 break;
3962                         }
3963                 }
3964         }
3965         return count;
3966 }
3967
3968 static int get_function_n_local_vars(declaration_t *declaration)
3969 {
3970         int count = 0;
3971
3972         /* count parameters */
3973         count += count_local_declarations(declaration->scope.declarations, NULL);
3974
3975         /* count local variables declared in body */
3976         count += count_decls_in_stmts(declaration->init.statement);
3977
3978         return count;
3979 }
3980
3981 static void initialize_function_parameters(declaration_t *declaration)
3982 {
3983         ir_graph        *irg             = current_ir_graph;
3984         ir_node         *args            = get_irg_args(irg);
3985         ir_node         *start_block     = get_irg_start_block(irg);
3986         ir_type         *function_irtype = get_ir_type(declaration->type);
3987
3988         int            n         = 0;
3989         declaration_t *parameter = declaration->scope.declarations;
3990         for( ; parameter != NULL; parameter = parameter->next, ++n) {
3991                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
3992                 type_t *type = skip_typeref(parameter->type);
3993
3994                 bool needs_entity = parameter->address_taken;
3995                 assert(!is_type_array(type));
3996                 if(is_type_compound(type)) {
3997                         needs_entity = true;
3998                 }
3999
4000                 if(needs_entity) {
4001                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
4002                         ident     *id     = new_id_from_str(parameter->symbol->string);
4003                         set_entity_ident(entity, id);
4004
4005                         parameter->declaration_kind
4006                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
4007                         parameter->v.entity = entity;
4008                         continue;
4009                 }
4010
4011                 ir_mode *mode = get_ir_mode(parameter->type);
4012                 long     pn   = n;
4013                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
4014
4015                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
4016                 parameter->v.value_number   = next_value_number_function;
4017                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
4018                 ++next_value_number_function;
4019
4020                 set_value(parameter->v.value_number, proj);
4021         }
4022 }
4023
4024 /**
4025  * Handle additional decl modifiers for IR-graphs
4026  *
4027  * @param irg            the IR-graph
4028  * @param dec_modifiers  additional modifiers
4029  */
4030 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
4031 {
4032         if (decl_modifiers & DM_NORETURN) {
4033                 /* TRUE if the declaration includes the Microsoft
4034                    __declspec(noreturn) specifier. */
4035                 set_irg_additional_property(irg, mtp_property_noreturn);
4036         }
4037         if (decl_modifiers & DM_NOTHROW) {
4038                 /* TRUE if the declaration includes the Microsoft
4039                    __declspec(nothrow) specifier. */
4040                 set_irg_additional_property(irg, mtp_property_nothrow);
4041         }
4042         if (decl_modifiers & DM_NAKED) {
4043                 /* TRUE if the declaration includes the Microsoft
4044                    __declspec(naked) specifier. */
4045                 set_irg_additional_property(irg, mtp_property_naked);
4046         }
4047         if (decl_modifiers & DM_FORCEINLINE) {
4048                 /* TRUE if the declaration includes the
4049                    Microsoft __forceinline specifier. */
4050                 set_irg_inline_property(irg, irg_inline_forced);
4051         }
4052         if (decl_modifiers & DM_NOINLINE) {
4053                 /* TRUE if the declaration includes the Microsoft
4054                    __declspec(noinline) specifier. */
4055                 set_irg_inline_property(irg, irg_inline_forbidden);
4056         }
4057 }
4058
4059 static void create_function(declaration_t *declaration)
4060 {
4061         ir_entity *function_entity = get_function_entity(declaration);
4062
4063         if(declaration->init.statement == NULL)
4064                 return;
4065
4066         current_function_decl = declaration;
4067         current_function_name = NULL;
4068
4069         assert(imature_blocks == NULL);
4070         imature_blocks = NEW_ARR_F(ir_node*, 0);
4071
4072         int       n_local_vars = get_function_n_local_vars(declaration);
4073         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
4074         ir_node  *first_block  = get_cur_block();
4075
4076         /* set inline flags */
4077         if (declaration->is_inline)
4078         set_irg_inline_property(irg, irg_inline_recomended);
4079     handle_decl_modifier_irg(irg, declaration->modifiers);
4080
4081         next_value_number_function = 0;
4082         initialize_function_parameters(declaration);
4083
4084         statement_to_firm(declaration->init.statement);
4085
4086         ir_node *end_block = get_irg_end_block(irg);
4087
4088         /* do we have a return statement yet? */
4089         if(get_cur_block() != NULL) {
4090                 type_t *type = skip_typeref(declaration->type);
4091                 assert(is_type_function(type));
4092                 const function_type_t *func_type   = &type->function;
4093                 const type_t          *return_type
4094                         = skip_typeref(func_type->return_type);
4095
4096                 ir_node *ret;
4097                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
4098                         ret = new_Return(get_store(), 0, NULL);
4099                 } else {
4100                         ir_mode *mode;
4101                         if(is_type_scalar(return_type)) {
4102                                 mode = get_ir_mode(func_type->return_type);
4103                         } else {
4104                                 mode = mode_P_data;
4105                         }
4106
4107                         ir_node *in[1];
4108                         /* §5.1.2.2.3 main implicitly returns 0 */
4109                         if (strcmp(declaration->symbol->string, "main") == 0) {
4110                                 in[0] = new_Const(mode, get_mode_null(mode));
4111                         } else {
4112                                 in[0] = new_Unknown(mode);
4113                         }
4114                         ret = new_Return(get_store(), 1, in);
4115                 }
4116                 add_immBlock_pred(end_block, ret);
4117         }
4118
4119         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
4120                 mature_immBlock(imature_blocks[i]);
4121         }
4122         DEL_ARR_F(imature_blocks);
4123         imature_blocks = NULL;
4124
4125         mature_immBlock(first_block);
4126         mature_immBlock(end_block);
4127
4128         irg_finalize_cons(irg);
4129
4130         /* finalize the frame type */
4131         ir_type *frame_type = get_irg_frame_type(irg);
4132         int      n          = get_compound_n_members(frame_type);
4133         int      align_all  = 4;
4134         int      offset     = 0;
4135         for(int i = 0; i < n; ++i) {
4136                 ir_entity *entity      = get_compound_member(frame_type, i);
4137                 ir_type   *entity_type = get_entity_type(entity);
4138
4139                 int align = get_type_alignment_bytes(entity_type);
4140                 if(align > align_all)
4141                         align_all = align;
4142                 int misalign = 0;
4143                 if(align > 0) {
4144                         misalign  = offset % align;
4145                         if(misalign > 0) {
4146                                 offset += align - misalign;
4147                         }
4148                 }
4149
4150                 set_entity_offset(entity, offset);
4151                 offset += get_type_size_bytes(entity_type);
4152         }
4153         set_type_size_bytes(frame_type, offset);
4154         set_type_alignment_bytes(frame_type, align_all);
4155         set_type_state(frame_type, layout_fixed);
4156
4157         irg_vrfy(irg);
4158 }
4159
4160 static void create_global_variable(declaration_t *declaration)
4161 {
4162         ir_visibility  vis;
4163         ir_type       *var_type;
4164         switch ((storage_class_tag_t)declaration->storage_class) {
4165                 case STORAGE_CLASS_STATIC:
4166                         vis = visibility_local;
4167                         goto global_var;
4168
4169                 case STORAGE_CLASS_EXTERN:
4170                         vis = visibility_external_allocated;
4171                         goto global_var;
4172
4173                 case STORAGE_CLASS_NONE:
4174                         vis = visibility_external_visible;
4175                         goto global_var;
4176
4177                 case STORAGE_CLASS_THREAD:
4178                         vis = visibility_external_visible;
4179                         goto tls_var;
4180
4181                 case STORAGE_CLASS_THREAD_EXTERN:
4182                         vis = visibility_external_allocated;
4183                         goto tls_var;
4184
4185                 case STORAGE_CLASS_THREAD_STATIC:
4186                         vis = visibility_local;
4187                         goto tls_var;
4188
4189 tls_var:
4190                         var_type = get_tls_type();
4191                         goto create_var;
4192
4193 global_var:
4194                         var_type = get_glob_type();
4195                         goto create_var;
4196
4197 create_var:
4198                         create_declaration_entity(declaration,
4199                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
4200                                                   var_type);
4201                         set_entity_visibility(declaration->v.entity, vis);
4202
4203                         return;
4204
4205                 case STORAGE_CLASS_TYPEDEF:
4206                 case STORAGE_CLASS_AUTO:
4207                 case STORAGE_CLASS_REGISTER:
4208                 case STORAGE_CLASS_ENUM_ENTRY:
4209                         break;
4210         }
4211         panic("Invalid storage class for global variable");
4212 }
4213
4214 static void scope_to_firm(scope_t *scope)
4215 {
4216         /* first pass: create declarations */
4217         declaration_t *declaration = scope->declarations;
4218         for( ; declaration != NULL; declaration = declaration->next) {
4219                 if(declaration->namespc != NAMESPACE_NORMAL)
4220                         continue;
4221                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4222                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4223                         continue;
4224                 if(declaration->symbol == NULL)
4225                         continue;
4226
4227                 type_t *type = skip_typeref(declaration->type);
4228                 if(is_type_function(type)) {
4229                         get_function_entity(declaration);
4230                 } else {
4231                         create_global_variable(declaration);
4232                 }
4233         }
4234
4235         /* second pass: create code/initializers */
4236         declaration = scope->declarations;
4237         for( ; declaration != NULL; declaration = declaration->next) {
4238                 if(declaration->namespc != NAMESPACE_NORMAL)
4239                         continue;
4240                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4241                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4242                         continue;
4243                 if(declaration->symbol == NULL)
4244                         continue;
4245
4246                 type_t *type = declaration->type;
4247                 if(type->kind == TYPE_FUNCTION) {
4248                         create_function(declaration);
4249                 } else {
4250                         assert(declaration->declaration_kind
4251                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
4252                         current_ir_graph = get_const_code_irg();
4253                         create_initializer(declaration);
4254                 }
4255         }
4256 }
4257
4258 void init_ast2firm(void)
4259 {
4260         obstack_init(&asm_obst);
4261         init_atomic_modes();
4262
4263         /* create idents for all known runtime functions */
4264         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
4265                 predef_idents[rts_data[i].id] = new_id_from_str(rts_data[i].name);
4266         }
4267 }
4268
4269 void exit_ast2firm(void)
4270 {
4271         obstack_free(&asm_obst, NULL);
4272 }
4273
4274 void translation_unit_to_firm(translation_unit_t *unit)
4275 {
4276         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
4277         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
4278         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
4279
4280         ir_type_int        = get_ir_type(type_int);
4281         ir_type_const_char = get_ir_type(type_const_char);
4282         ir_type_wchar_t    = get_ir_type(type_wchar_t);
4283         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
4284                                                        type in firm */
4285
4286         type_void->base.firm_type = ir_type_void;
4287
4288         /* just to be sure */
4289         continue_label      = NULL;
4290         break_label         = NULL;
4291         current_switch_cond = NULL;
4292
4293         scope_to_firm(&unit->scope);
4294 }