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