nsz Git - cparser/blob - ast2firm.c

   1 #include <config.h>
   2
   3 #define _GNU_SOURCE
   4
   5 #include <assert.h>
   6 #include <string.h>
   7 #include <stdbool.h>
   8
   9 #include <libfirm/firm.h>
  10 #include <libfirm/adt/obst.h>
  11
  12 #include "ast2firm.h"
  13
  14 #include "adt/error.h"
  15 #include "adt/array.h"
  16 #include "token_t.h"
  17 #include "type_t.h"
  18 #include "ast_t.h"
  19 #include "parser.h"
  20 #include "lang_features.h"
  21 #include "driver/firm_opt.h"
  22 #include "driver/firm_cmdline.h"
  23
  24 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  25
  26 static ir_type *ir_type_const_char;
  27 static ir_type *ir_type_wchar_t;
  28 static ir_type *ir_type_void;
  29 static ir_type *ir_type_int;
  30
  31 static type_t *type_const_char;
  32 static type_t *type_void;
  33 static type_t *type_int;
  34
  35 static int       next_value_number_function;
  36 static ir_node  *continue_label;
  37 static ir_node  *break_label;
  38 static ir_node  *current_switch_cond;
  39 static bool      saw_default_label;
  40 static ir_node **imature_blocks;
  41
  42 static const declaration_t *current_function_decl;
  43 static ir_node             *current_function_name;
  44
  45 static struct obstack asm_obst;
  46
  47 typedef enum declaration_type_t {
  48         DECLARATION_TYPE_UNKNOWN,
  49         DECLARATION_TYPE_FUNCTION,
  50         DECLARATION_TYPE_GLOBAL_VARIABLE,
  51         DECLARATION_TYPE_LOCAL_VARIABLE,
  52         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  53         DECLARATION_TYPE_COMPOUND_MEMBER,
  54         DECLARATION_TYPE_LABEL_BLOCK,
  55         DECLARATION_TYPE_ENUM_ENTRY
  56 } declaration_type_t;
  57
  58 static ir_type *get_ir_type(type_t *type);
  59 static int count_decls_in_stmts(const statement_t *stmt);
  60
  61 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  62 {
  63         (void) pos;
  64 #if 0
  65         const declaration_t *declaration = & value_numbers[pos]->declaration;
  66
  67         print_warning_prefix(declaration->source_position);
  68         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  69                         declaration->symbol->string);
  70 #endif
  71         fprintf(stderr, "Some variable might be used uninitialized\n");
  72         return new_r_Unknown(irg, mode);
  73 }
  74
  75 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  76 {
  77         const source_position_t *pos = (const source_position_t*) dbg;
  78         if(pos == NULL)
  79                 return 0;
  80         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  81                                    pos->linenr);
  82 }
  83
  84 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
  85 {
  86         const source_position_t *pos = (const source_position_t*) dbg;
  87         if(pos == NULL)
  88                 return NULL;
  89         if(line != NULL)
  90                 *line = pos->linenr;
  91         return pos->input_name;
  92 }
  93
  94 static dbg_info *get_dbg_info(const source_position_t *pos)
  95 {
  96         return (dbg_info*) pos;
  97 }
  98
  99 static unsigned unique_id = 0;
 100
 101 static ident *unique_ident(const char *tag)
 102 {
 103         char buf[256];
 104
 105         snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
 106         unique_id++;
 107         return new_id_from_str(buf);
 108 }
 109
 110 /**
 111  * Return the signed integer mode of size bytes.
 112  *
 113  * @param size   the size
 114  */
 115 static ir_mode *get_smode(unsigned size)
 116 {
 117         static ir_mode *s_modes[16 + 1] = {0, };
 118         ir_mode *res;
 119
 120         if (size <= 0 || size > 16)
 121                 return NULL;
 122
 123         res = s_modes[size];
 124         if (res == NULL) {
 125                 unsigned bits;
 126         char name[32];
 127
 128         bits = size * 8;
 129         snprintf(name, sizeof(name), "i%u", bits);
 130         res = new_ir_mode(name, irms_int_number, bits, 1, irma_twos_complement,
 131                                         bits <= machine_size ? machine_size : bits );
 132
 133                 s_modes[size] = res;
 134         }
 135         return res;
 136 }
 137
 138 /**
 139  * Return the unsigned integer mode of size bytes.
 140  *
 141  * @param size  the size
 142  */
 143 static ir_mode *get_umode(unsigned size)
 144 {
 145         static ir_mode *u_modes[16 + 1] = {0, };
 146         ir_mode *res;
 147
 148         if (size <= 0 || size > 16)
 149                 return NULL;
 150
 151         res = u_modes[size];
 152         if (res == NULL) {
 153                 unsigned bits;
 154                 char name[32];
 155
 156                 bits = size * 8;
 157                 snprintf(name, sizeof(name), "u%u", bits);
 158                 res = new_ir_mode(name, irms_int_number, bits, 0, irma_twos_complement,
 159                                                 bits <= machine_size ? machine_size : bits );
 160
 161                 u_modes[size] = res;
 162         }
 163         return res;
 164 }
 165
 166 /**
 167  * Return the pointer mode of size bytes.
 168  *
 169  * @param size  the size
 170  */
 171 static ir_mode *get_ptrmode(unsigned size, char *name)
 172 {
 173         static ir_mode *p_modes[16 + 1] = {0, };
 174         ir_mode *res;
 175
 176         if (size <= 0 || size > 16)
 177                 return NULL;
 178
 179         res = p_modes[size];
 180         if (res == NULL) {
 181                 unsigned bits;
 182                 char buf[32];
 183
 184                 bits = size * 8;
 185                 if (name == NULL) {
 186                         snprintf(buf, sizeof(buf), "p%u", bits);
 187                         name = buf;
 188                 }
 189                 res = new_ir_mode(name, irms_reference, bits, 0, irma_twos_complement,
 190                                                 bits <= machine_size ? machine_size : bits);
 191
 192                 p_modes[size] = res;
 193
 194                 set_reference_mode_signed_eq(res, get_smode(size));
 195                 set_reference_mode_unsigned_eq(res, get_umode(size));
 196         }
 197         return res;
 198 }
 199
 200 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST];
 201
 202 static ir_mode *mode_int, *mode_uint;
 203
 204 /**
 205  * Initialises the atomic modes depending on the machine size.
 206  */
 207 static void init_atomic_modes(void) {
 208         unsigned int_size   = machine_size < 32 ? 2 : 4;
 209         unsigned long_size  = machine_size < 64 ? 4 : 8;
 210         unsigned llong_size = machine_size < 32 ? 4 : 8;
 211
 212         /* firm has no real void... */
 213         _atomic_modes[ATOMIC_TYPE_VOID]        = mode_T;
 214         _atomic_modes[ATOMIC_TYPE_CHAR]        = char_is_signed ? get_smode(1) : get_umode(1);
 215         _atomic_modes[ATOMIC_TYPE_SCHAR]       = get_smode(1);
 216         _atomic_modes[ATOMIC_TYPE_UCHAR]       = get_umode(1);
 217         _atomic_modes[ATOMIC_TYPE_SHORT]       = get_smode(2);
 218         _atomic_modes[ATOMIC_TYPE_USHORT]      = get_umode(2);
 219         _atomic_modes[ATOMIC_TYPE_INT]         = get_smode(int_size);
 220         _atomic_modes[ATOMIC_TYPE_UINT]        = get_umode(int_size);
 221         _atomic_modes[ATOMIC_TYPE_LONG]        = get_smode(long_size);
 222         _atomic_modes[ATOMIC_TYPE_ULONG]       = get_umode(long_size);
 223         _atomic_modes[ATOMIC_TYPE_LONGLONG]    = get_smode(llong_size);
 224         _atomic_modes[ATOMIC_TYPE_ULONGLONG]   = get_umode(llong_size);
 225         _atomic_modes[ATOMIC_TYPE_FLOAT]       = mode_F;
 226         _atomic_modes[ATOMIC_TYPE_DOUBLE]      = mode_D;
 227         _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE] = mode_E;
 228         _atomic_modes[ATOMIC_TYPE_BOOL]        = get_umode(int_size);
 229
 230 #ifdef PROVIDE_COMPLEX
 231         _atomic_modes[ATOMIC_TYPE_BOOL]                  = _atomic_modes[ATOMIC_TYPE_INT];
 232         _atomic_modes[ATOMIC_TYPE_FLOAT_IMAGINARY]       = _atomic_modes[ATOMIC_TYPE_FLOAT];
 233         _atomic_modes[ATOMIC_TYPE_DOUBLE_IMAGINARY]      = _atomic_modes[ATOMIC_TYPE_DOUBLE];
 234         _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY] = _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE];
 235 #endif
 236
 237         /* Hmm, pointers should be machine size */
 238         set_modeP_data(get_ptrmode(machine_size >> 3, NULL));
 239         set_modeP_code(get_ptrmode(machine_size >> 3, NULL));
 240
 241         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 242         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 243 }
 244
 245 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 246 {
 247         ir_mode *res = NULL;
 248         if ((unsigned)atomic_type->atype < (unsigned)ATOMIC_TYPE_LAST)
 249                 res = _atomic_modes[(unsigned)atomic_type->atype];
 250         if (res == NULL)
 251                 panic("Encountered unknown atomic type");
 252         return res;
 253 }
 254
 255 static unsigned get_type_size(type_t *type);
 256
 257 static unsigned get_atomic_type_size(const atomic_type_t *type)
 258 {
 259         switch(type->atype) {
 260         case ATOMIC_TYPE_CHAR:
 261         case ATOMIC_TYPE_SCHAR:
 262         case ATOMIC_TYPE_UCHAR:
 263                 return 1;
 264
 265         case ATOMIC_TYPE_SHORT:
 266         case ATOMIC_TYPE_USHORT:
 267                 return 2;
 268
 269         case ATOMIC_TYPE_BOOL:
 270         case ATOMIC_TYPE_INT:
 271         case ATOMIC_TYPE_UINT:
 272                 return machine_size >> 3;
 273
 274         case ATOMIC_TYPE_LONG:
 275         case ATOMIC_TYPE_ULONG:
 276                 return machine_size > 16 ? machine_size >> 3 : 4;
 277
 278         case ATOMIC_TYPE_LONGLONG:
 279         case ATOMIC_TYPE_ULONGLONG:
 280                 return machine_size > 16 ? 8 : 4;
 281
 282         case ATOMIC_TYPE_FLOAT:
 283                 return 4;
 284
 285         case ATOMIC_TYPE_DOUBLE:
 286                 return 8;
 287
 288         case ATOMIC_TYPE_LONG_DOUBLE:
 289                 return 12;
 290
 291         case ATOMIC_TYPE_VOID:
 292                 return 1;
 293
 294         case ATOMIC_TYPE_INVALID:
 295         case ATOMIC_TYPE_LAST:
 296                 break;
 297         }
 298         panic("Trying to determine size of invalid atomic type");
 299 }
 300
 301 static unsigned get_compound_type_size(compound_type_t *type)
 302 {
 303         ir_type *irtype = get_ir_type((type_t*) type);
 304         return get_type_size_bytes(irtype);
 305 }
 306
 307 static unsigned get_array_type_size(array_type_t *type)
 308 {
 309         ir_type *irtype = get_ir_type((type_t*) type);
 310         return get_type_size_bytes(irtype);
 311 }
 312
 313
 314 static unsigned get_type_size(type_t *type)
 315 {
 316         type = skip_typeref(type);
 317
 318         switch(type->type) {
 319         case TYPE_ATOMIC:
 320                 return get_atomic_type_size(&type->atomic);
 321         case TYPE_ENUM:
 322                 return get_mode_size_bytes(mode_int);
 323         case TYPE_COMPOUND_UNION:
 324         case TYPE_COMPOUND_STRUCT:
 325                 return get_compound_type_size(&type->compound);
 326         case TYPE_FUNCTION:
 327                 /* just a pointer to the function */
 328                 return get_mode_size_bytes(mode_P_code);
 329         case TYPE_POINTER:
 330                 return get_mode_size_bytes(mode_P_data);
 331         case TYPE_ARRAY:
 332                 return get_array_type_size(&type->array);
 333         case TYPE_BUILTIN:
 334                 return get_type_size(type->builtin.real_type);
 335         case TYPE_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->atype == ATOMIC_TYPE_LONG_DOUBLE) {
 367                 set_type_alignment_bytes(irtype, 4);
 368         }
 369
 370         return irtype;
 371 }
 372
 373 static ir_type *create_method_type(const function_type_t *function_type)
 374 {
 375         type_t  *return_type  = function_type->return_type;
 376
 377         ident   *id           = unique_ident("functiontype");
 378         int      n_parameters = count_parameters(function_type);
 379         int      n_results    = return_type == type_void ? 0 : 1;
 380         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 381
 382         if(return_type != type_void) {
 383                 ir_type *restype = get_ir_type(return_type);
 384                 set_method_res_type(irtype, 0, restype);
 385         }
 386
 387         function_parameter_t *parameter = function_type->parameters;
 388         int                   n         = 0;
 389         for( ; parameter != NULL; parameter = parameter->next) {
 390                 ir_type *p_irtype = get_ir_type(parameter->type);
 391                 set_method_param_type(irtype, n, p_irtype);
 392                 ++n;
 393         }
 394
 395         if(function_type->variadic || function_type->unspecified_parameters) {
 396                 set_method_variadicity(irtype, variadicity_variadic);
 397         }
 398
 399         return irtype;
 400 }
 401
 402 static ir_type *create_pointer_type(pointer_type_t *type)
 403 {
 404         type_t  *points_to = type->points_to;
 405         ir_type *ir_points_to;
 406         /* Avoid endless recursion if the points_to type contains this poiner type
 407          * again (might be a struct). We therefore first create a void* pointer
 408          * and then set the real points_to type
 409          */
 410         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 411                                             ir_type_void, mode_P_data);
 412         type->type.firm_type  = ir_type;
 413
 414         ir_points_to = get_ir_type(points_to);
 415         set_pointer_points_to_type(ir_type, ir_points_to);
 416
 417         return ir_type;
 418 }
 419
 420 static ir_type *create_array_type(array_type_t *type)
 421 {
 422         type_t  *element_type    = type->element_type;
 423         ir_type *ir_element_type = get_ir_type(element_type);
 424
 425         ident   *id      = unique_ident("array");
 426         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 427
 428         if(type->size != NULL) {
 429                 int n_elements = fold_constant(type->size);
 430
 431                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 432
 433                 size_t elemsize = get_type_size_bytes(ir_element_type);
 434                 int align = get_type_alignment_bytes(ir_element_type);
 435                 if(elemsize % align > 0) {
 436                         elemsize += align - (elemsize % align);
 437                 }
 438                 set_type_size_bytes(ir_type, n_elements * elemsize);
 439                 set_type_alignment_bytes(ir_type, align);
 440                 set_type_state(ir_type, layout_fixed);
 441         } else {
 442                 set_array_lower_bound_int(ir_type, 0, 0);
 443         }
 444
 445         return ir_type;
 446 }
 447
 448 #define INVALID_TYPE ((ir_type_ptr)-1)
 449
 450 static ir_type *create_struct_type(compound_type_t *type)
 451 {
 452         symbol_t *symbol = type->declaration->symbol;
 453         ident    *id;
 454         if(symbol != NULL) {
 455                 id = unique_ident(symbol->string);
 456         } else {
 457                 id = unique_ident("__anonymous_struct");
 458         }
 459         ir_type *ir_type = new_type_struct(id);
 460
 461         type->type.firm_type = ir_type;
 462
 463         int align_all = 1;
 464         int offset    = 0;
 465         declaration_t *entry = type->declaration->context.declarations;
 466         for( ; entry != NULL; entry = entry->next) {
 467                 if(entry->namespc != NAMESPACE_NORMAL)
 468                         continue;
 469
 470                 ident       *ident         = new_id_from_str(entry->symbol->string);
 471                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 472
 473                 int entry_size      = get_type_size_bytes(entry_ir_type);
 474                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 475                 int misalign        = offset % entry_alignment;
 476                 if (misalign != 0)
 477                         offset += entry_alignment - misalign;
 478
 479                 dbg_info  *const dbgi   = get_dbg_info(&entry->source_position);
 480                 ir_entity *const entity = new_d_entity(ir_type, ident, entry_ir_type, dbgi);
 481                 set_entity_offset(entity, offset);
 482                 add_struct_member(ir_type, entity);
 483                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 484                 entry->v.entity         = entity;
 485
 486                 offset += entry_size;
 487                 if(entry_alignment > align_all) {
 488                         if(entry_alignment % align_all != 0) {
 489                                 panic("Uneven alignments not supported yet");
 490                         }
 491                         align_all = entry_alignment;
 492                 }
 493         }
 494
 495         int misalign = offset % align_all;
 496         offset += misalign;
 497         set_type_alignment_bytes(ir_type, align_all);
 498         set_type_size_bytes(ir_type, offset);
 499         set_type_state(ir_type, layout_fixed);
 500
 501         return ir_type;
 502 }
 503
 504 static ir_type *create_union_type(compound_type_t *type)
 505 {
 506         declaration_t *declaration = type->declaration;
 507         symbol_t      *symbol      = declaration->symbol;
 508         ident         *id;
 509         if(symbol != NULL) {
 510                 id = unique_ident(symbol->string);
 511         } else {
 512                 id = unique_ident("__anonymous_union");
 513         }
 514         ir_type  *ir_type = new_type_union(id);
 515
 516         type->type.firm_type = ir_type;
 517
 518         int align_all = 1;
 519         int size      = 0;
 520         declaration_t *entry = declaration->context.declarations;
 521         for( ; entry != NULL; entry = entry->next) {
 522                 if(entry->namespc != NAMESPACE_NORMAL)
 523                         continue;
 524
 525                 ident       *ident         = new_id_from_str(entry->symbol->string);
 526                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 527
 528                 int entry_size      = get_type_size_bytes(entry_ir_type);
 529                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 530
 531                 dbg_info  *const dbgi   = get_dbg_info(&entry->source_position);
 532                 ir_entity *const entity = new_d_entity(ir_type, ident, entry_ir_type, dbgi);
 533                 add_union_member(ir_type, entity);
 534                 set_entity_offset(entity, 0);
 535                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 536                 entry->v.entity         = entity;
 537
 538                 if(entry_size > size) {
 539                         size = entry_size;
 540                 }
 541                 if(entry_alignment > align_all) {
 542                         if(entry_alignment % align_all != 0) {
 543                                 panic("Uneven alignments not supported yet");
 544                         }
 545                         align_all = entry_alignment;
 546                 }
 547         }
 548
 549         set_type_alignment_bytes(ir_type, align_all);
 550         set_type_size_bytes(ir_type, size);
 551         set_type_state(ir_type, layout_fixed);
 552
 553         return ir_type;
 554 }
 555
 556 static ir_node *expression_to_firm(const expression_t *expression);
 557 static inline ir_mode *get_ir_mode(type_t *type);
 558
 559 static ir_type *create_enum_type(enum_type_t *const type)
 560 {
 561         type->type.firm_type = ir_type_int;
 562
 563         ir_mode *const mode    = get_ir_mode((type_t*) type);
 564         tarval  *const one     = get_mode_one(mode);
 565         tarval  *      tv_next = get_tarval_null(mode);
 566
 567         declaration_t *declaration = type->declaration->next;
 568         for (; declaration != NULL; declaration = declaration->next) {
 569                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 570                         break;
 571
 572                 declaration->declaration_type = DECLARATION_TYPE_ENUM_ENTRY;
 573
 574                 expression_t *const init = declaration->init.enum_value;
 575                 if (init != NULL) {
 576                         ir_node *const cnst = expression_to_firm(init);
 577                         if (!is_Const(cnst)) {
 578                                 panic("couldn't fold constant");
 579                         }
 580                         tv_next = get_Const_tarval(cnst);
 581                 }
 582                 declaration->v.enum_val = tv_next;
 583                 tv_next = tarval_add(tv_next, one);
 584         }
 585
 586         return ir_type_int;
 587 }
 588
 589 static ir_type *get_ir_type(type_t *type)
 590 {
 591         assert(type != NULL);
 592
 593         type = skip_typeref(type);
 594
 595         if(type->base.firm_type != NULL) {
 596                 assert(type->base.firm_type != INVALID_TYPE);
 597                 return type->base.firm_type;
 598         }
 599
 600         ir_type *firm_type = NULL;
 601         switch(type->type) {
 602         case TYPE_ATOMIC:
 603                 firm_type = create_atomic_type(&type->atomic);
 604                 break;
 605         case TYPE_FUNCTION:
 606                 firm_type = create_method_type(&type->function);
 607                 break;
 608         case TYPE_POINTER:
 609                 firm_type = create_pointer_type(&type->pointer);
 610                 break;
 611         case TYPE_ARRAY:
 612                 firm_type = create_array_type(&type->array);
 613                 break;
 614         case TYPE_COMPOUND_STRUCT:
 615                 firm_type = create_struct_type(&type->compound);
 616                 break;
 617         case TYPE_COMPOUND_UNION:
 618                 firm_type = create_union_type(&type->compound);
 619                 break;
 620         case TYPE_ENUM:
 621                 firm_type = create_enum_type(&type->enumt);
 622                 break;
 623         case TYPE_BUILTIN:
 624                 firm_type = get_ir_type(type->builtin.real_type);
 625                 break;
 626         case TYPE_TYPEOF:
 627         case TYPE_TYPEDEF:
 628         case TYPE_INVALID:
 629                 break;
 630         }
 631         if(firm_type == NULL)
 632                 panic("unknown type found");
 633
 634         type->base.firm_type = firm_type;
 635         return firm_type;
 636 }
 637
 638 static inline ir_mode *get_ir_mode(type_t *type)
 639 {
 640         ir_type *irtype = get_ir_type(type);
 641
 642         /* firm doesn't report a mode for arrays somehow... */
 643         if(is_Array_type(irtype)) {
 644                 return mode_P_data;
 645         }
 646
 647         ir_mode *mode = get_type_mode(irtype);
 648         assert(mode != NULL);
 649         return mode;
 650 }
 651
 652 static ident *predef_idents[rts_max];
 653
 654 /** Names of the runtime functions. */
 655 static const struct {
 656         int        id;           /**< the rts id */
 657         int        n_res;        /**< number of return values */
 658         const char *name;        /**< the name of the rts function */
 659         int        n_params;     /**< number of parameters */
 660         unsigned   flags;        /**< language flags */
 661 } rts_data[] = {
 662         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 663         { rts_abort,      0, "abort",        0, _C89 },
 664         { rts_abs,        1, "abs",          1, _C89 },
 665         { rts_labs,       1, "labs",         1, _C89 },
 666         { rts_llabs,      1, "llabs",        1, _C99 },
 667         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 668
 669         { rts_fabs,       1, "fabs",         1, _C89 },
 670         { rts_sqrt,       1, "sqrt",         1, _C89 },
 671         { rts_cbrt,       1, "cbrt",         1, _C99 },
 672         { rts_exp,        1, "exp",          1, _C89 },
 673         { rts_exp2,       1, "exp2",         1, _C89 },
 674         { rts_exp10,      1, "exp10",        1, _GNUC },
 675         { rts_log,        1, "log",          1, _C89 },
 676         { rts_log2,       1, "log2",         1, _C89 },
 677         { rts_log10,      1, "log10",        1, _C89 },
 678         { rts_pow,        1, "pow",          2, _C89 },
 679         { rts_sin,        1, "sin",          1, _C89 },
 680         { rts_cos,        1, "cos",          1, _C89 },
 681         { rts_tan,        1, "tan",          1, _C89 },
 682         { rts_asin,       1, "asin",         1, _C89 },
 683         { rts_acos,       1, "acos",         1, _C89 },
 684         { rts_atan,       1, "atan",         1, _C89 },
 685         { rts_sinh,       1, "sinh",         1, _C89 },
 686         { rts_cosh,       1, "cosh",         1, _C89 },
 687         { rts_tanh,       1, "tanh",         1, _C89 },
 688
 689         { rts_fabsf,      1, "fabsf",        1, _C99 },
 690         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 691         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 692         { rts_expf,       1, "expf",         1, _C99 },
 693         { rts_exp2f,      1, "exp2f",        1, _C99 },
 694         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 695         { rts_logf,       1, "logf",         1, _C99 },
 696         { rts_log2f,      1, "log2f",        1, _C99 },
 697         { rts_log10f,     1, "log10f",       1, _C99 },
 698         { rts_powf,       1, "powf",         2, _C99 },
 699         { rts_sinf,       1, "sinf",         1, _C99 },
 700         { rts_cosf,       1, "cosf",         1, _C99 },
 701         { rts_tanf,       1, "tanf",         1, _C99 },
 702         { rts_asinf,      1, "asinf",        1, _C99 },
 703         { rts_acosf,      1, "acosf",        1, _C99 },
 704         { rts_atanf,      1, "atanf",        1, _C99 },
 705         { rts_sinhf,      1, "sinhf",        1, _C99 },
 706         { rts_coshf,      1, "coshf",        1, _C99 },
 707         { rts_tanhf,      1, "tanhf",        1, _C99 },
 708
 709         { rts_fabsl,      1, "fabsl",        1, _C99 },
 710         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 711         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 712         { rts_expl,       1, "expl",         1, _C99 },
 713         { rts_exp2l,      1, "exp2l",        1, _C99 },
 714         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 715         { rts_logl,       1, "logl",         1, _C99 },
 716         { rts_log2l,      1, "log2l",        1, _C99 },
 717         { rts_log10l,     1, "log10l",       1, _C99 },
 718         { rts_powl,       1, "powl",         2, _C99 },
 719         { rts_sinl,       1, "sinl",         1, _C99 },
 720         { rts_cosl,       1, "cosl",         1, _C99 },
 721         { rts_tanl,       1, "tanl",         1, _C99 },
 722         { rts_asinl,      1, "asinl",        1, _C99 },
 723         { rts_acosl,      1, "acosl",        1, _C99 },
 724         { rts_atanl,      1, "atanl",        1, _C99 },
 725         { rts_sinhl,      1, "sinhl",        1, _C99 },
 726         { rts_coshl,      1, "coshl",        1, _C99 },
 727         { rts_tanhl,      1, "tanhl",        1, _C99 },
 728
 729         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 730         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 731         { rts_strcmp,     1, "strcmp",       2, _C89 },
 732         { rts_strncmp,    1, "strncmp",      3, _C89 }
 733 };
 734
 735 static ir_entity* get_function_entity(declaration_t *declaration)
 736 {
 737         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 738                 return declaration->v.entity;
 739         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 740
 741         symbol_t *symbol = declaration->symbol;
 742         ident    *id     = new_id_from_str(symbol->string);
 743
 744         ir_type  *global_type    = get_glob_type();
 745         ir_type  *ir_type_method = get_ir_type(declaration->type);
 746         assert(is_Method_type(ir_type_method));
 747
 748         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
 749         ir_entity *const entity = new_d_entity(global_type, id, ir_type_method, dbgi);
 750         set_entity_ld_ident(entity, id);
 751         if(declaration->storage_class == STORAGE_CLASS_STATIC
 752                         || declaration->is_inline) {
 753                 set_entity_visibility(entity, visibility_local);
 754         } else if(declaration->init.statement != NULL) {
 755                 set_entity_visibility(entity, visibility_external_visible);
 756         } else {
 757                 set_entity_visibility(entity, visibility_external_allocated);
 758
 759                 /* We should check for file scope here, but as long as we compile C only
 760                    this is not needed. */
 761                 int n_params     = get_method_n_params(ir_type_method);
 762                 int n_res        = get_method_n_ress(ir_type_method);
 763                 ir_ident_ptr id  = get_entity_ident(entity);
 764                 int i;
 765
 766                 if (n_params == 0 && n_res == 0 && id == predef_idents[rts_abort]) {
 767                         /* found abort(), store for later */
 768                         //abort_ent = ent;
 769                         //abort_tp  = ftype;
 770                 } else {
 771                         if (! firm_opt.freestanding) {
 772                                 /* check for a known runtime function */
 773                                 for (i = 0; i < rts_max; ++i) {
 774                                         /* ignore those rts functions not necessary needed for current mode */
 775                                         if ((c_mode & rts_data[i].flags) == 0)
 776                                                 continue;
 777                                         if (n_params == rts_data[i].n_params && n_res == rts_data[i].n_res &&
 778                                                 id == predef_idents[rts_data[i].id])
 779                                                 rts_entities[rts_data[i].id] = entity;
 780                                 }
 781                         }
 782                 }
 783         }
 784         set_entity_allocation(entity, allocation_static);
 785
 786         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 787         declaration->v.entity         = entity;
 788
 789         return entity;
 790 }
 791
 792 static ir_node *const_to_firm(const const_expression_t *cnst)
 793 {
 794         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 795         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 796
 797         char    buf[128];
 798         tarval *tv;
 799         size_t  len;
 800         if(mode_is_float(mode)) {
 801                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 802         } else {
 803                 if(mode_is_signed(mode)) {
 804                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
 805                 } else {
 806                         len = snprintf(buf, sizeof(buf), "%llu",
 807                                        (unsigned long long) cnst->v.int_value);
 808                 }
 809                 tv = new_tarval_from_str(buf, len, mode);
 810         }
 811
 812         return new_d_Const(dbgi, mode, tv);
 813 }
 814
 815 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 816 {
 817         assert(entity != NULL);
 818         union symconst_symbol sym;
 819         sym.entity_p = entity;
 820         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 821 }
 822
 823 static ir_node *string_to_firm(const source_position_t *const src_pos,
 824                                const char *const id_prefix,
 825                                const char *const string)
 826 {
 827         ir_type *const global_type = get_glob_type();
 828         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 829                                                     ir_type_const_char);
 830
 831         ident     *const id     = unique_ident(id_prefix);
 832         dbg_info  *const dbgi   = get_dbg_info(src_pos);
 833         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
 834         set_entity_ld_ident(entity, id);
 835         set_entity_variability(entity, variability_constant);
 836         set_entity_allocation(entity, allocation_static);
 837
 838         ir_type *const elem_type = ir_type_const_char;
 839         ir_mode *const mode      = get_type_mode(elem_type);
 840
 841         const size_t slen = strlen(string) + 1;
 842
 843         set_array_lower_bound_int(type, 0, 0);
 844         set_array_upper_bound_int(type, 0, slen);
 845         set_type_size_bytes(type, slen);
 846         set_type_state(type, layout_fixed);
 847
 848         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 849         for(size_t i = 0; i < slen; ++i) {
 850                 tvs[i] = new_tarval_from_long(string[i], mode);
 851         }
 852
 853         set_array_entity_values(entity, tvs, slen);
 854         free(tvs);
 855
 856         return create_symconst(dbgi, entity);
 857 }
 858
 859 static ir_node *string_literal_to_firm(
 860                 const string_literal_expression_t* literal)
 861 {
 862         return string_to_firm(&literal->expression.source_position, "Lstr",
 863                               literal->value);
 864 }
 865
 866 static ir_node *wide_string_literal_to_firm(
 867         const wide_string_literal_expression_t* const literal)
 868 {
 869         ir_type *const global_type = get_glob_type();
 870         ir_type *const elem_type   = ir_type_wchar_t;
 871         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 872                                                     elem_type);
 873
 874         ident     *const id     = unique_ident("Lstr");
 875         dbg_info  *const dbgi   = get_dbg_info(&literal->expression.source_position);
 876         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
 877         set_entity_ld_ident(entity, id);
 878         set_entity_variability(entity, variability_constant);
 879         set_entity_allocation(entity, allocation_static);
 880
 881         ir_mode *const mode      = get_type_mode(elem_type);
 882
 883         const wchar_rep_t *const string = literal->value.begin;
 884         const size_t             slen   = literal->value.size;
 885
 886         set_array_lower_bound_int(type, 0, 0);
 887         set_array_upper_bound_int(type, 0, slen);
 888         set_type_size_bytes(type, slen);
 889         set_type_state(type, layout_fixed);
 890
 891         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 892         for(size_t i = 0; i < slen; ++i) {
 893                 tvs[i] = new_tarval_from_long(string[i], mode);
 894         }
 895
 896         set_array_entity_values(entity, tvs, slen);
 897         free(tvs);
 898
 899         return create_symconst(dbgi, entity);
 900 }
 901
 902 static ir_node *deref_address(ir_type *const irtype, ir_node *const addr,
 903                               dbg_info *const dbgi)
 904 {
 905         if(is_compound_type(irtype) || is_Array_type(irtype)) {
 906                 return addr;
 907         }
 908
 909         ir_mode *const mode     = get_type_mode(irtype);
 910         ir_node *const memory   = get_store();
 911         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
 912         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 913         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
 914         set_store(load_mem);
 915         return load_res;
 916 }
 917
 918 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
 919 {
 920         ir_mode *mode = get_irn_mode(node);
 921
 922         if(!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
 923                 return node;
 924         if(!mode_is_float(mode))
 925                 return node;
 926
 927         /* check if there is already a Conv */
 928         if (get_irn_op(node) == op_Conv) {
 929                 /* convert it into a strict Conv */
 930                 set_Conv_strict(node, 1);
 931                 return node;
 932         }
 933
 934         /* otherwise create a new one */
 935         return new_d_strictConv(dbgi, node, mode);
 936 }
 937
 938 static ir_node *get_global_var_address(dbg_info *const dbgi,
 939                                        const declaration_t *const decl)
 940 {
 941         assert(decl->declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
 942
 943         ir_entity *const entity = decl->v.entity;
 944         switch ((storage_class_tag_t)decl->storage_class) {
 945                 case STORAGE_CLASS_THREAD:
 946                 case STORAGE_CLASS_THREAD_EXTERN:
 947                 case STORAGE_CLASS_THREAD_STATIC: {
 948                         ir_node *const no_mem = new_NoMem();
 949                         ir_node *const tls    = get_irg_tls(current_ir_graph);
 950                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
 951                 }
 952
 953                 default:
 954                         return create_symconst(dbgi, entity);
 955         }
 956 }
 957
 958 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 959 {
 960         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 961         declaration_t *declaration = ref->declaration;
 962         type_t        *type        = skip_typeref(declaration->type);
 963
 964         switch((declaration_type_t) declaration->declaration_type) {
 965         case DECLARATION_TYPE_UNKNOWN:
 966                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
 967                         break;
 968                 }
 969                 get_ir_type(type);
 970                 /* FALLTHROUGH */
 971
 972         case DECLARATION_TYPE_ENUM_ENTRY: {
 973                 ir_mode *const mode = get_ir_mode(type);
 974                 return new_Const(mode, declaration->v.enum_val);
 975         }
 976
 977         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 978                 ir_mode *mode = get_ir_mode(type);
 979                 return get_value(declaration->v.value_number, mode);
 980         }
 981         case DECLARATION_TYPE_FUNCTION: {
 982                 return create_symconst(dbgi, declaration->v.entity);
 983         }
 984         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 985                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
 986                 ir_type *const irtype = get_entity_type(declaration->v.entity);
 987                 return deref_address(irtype, addr, dbgi);
 988         }
 989
 990         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 991                 ir_entity *entity = declaration->v.entity;
 992                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 993                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 994                 ir_type   *irtype = get_entity_type(entity);
 995                 return deref_address(irtype, sel, dbgi);
 996         }
 997
 998         case DECLARATION_TYPE_COMPOUND_MEMBER:
 999         case DECLARATION_TYPE_LABEL_BLOCK:
1000                 panic("not implemented reference type");
1001         }
1002
1003         panic("reference to declaration with unknown type found");
1004 }
1005
1006 static ir_node *reference_addr(const reference_expression_t *ref)
1007 {
1008         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
1009         declaration_t *declaration = ref->declaration;
1010
1011         switch((declaration_type_t) declaration->declaration_type) {
1012         case DECLARATION_TYPE_UNKNOWN:
1013                 break;
1014         case DECLARATION_TYPE_LOCAL_VARIABLE:
1015                 panic("local variable without entity has no address");
1016         case DECLARATION_TYPE_FUNCTION: {
1017                 return create_symconst(dbgi, declaration->v.entity);
1018         }
1019         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
1020                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1021                 return addr;
1022         }
1023         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
1024                 ir_entity *entity = declaration->v.entity;
1025                 ir_node   *frame  = get_irg_frame(current_ir_graph);
1026                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1027
1028                 return sel;
1029         }
1030
1031         case DECLARATION_TYPE_ENUM_ENTRY:
1032                 panic("trying to reference enum entry");
1033
1034         case DECLARATION_TYPE_COMPOUND_MEMBER:
1035         case DECLARATION_TYPE_LABEL_BLOCK:
1036                 panic("not implemented reference type");
1037         }
1038
1039         panic("reference to declaration with unknown type found");
1040 }
1041
1042 static ir_node *process_builtin_call(const call_expression_t *call)
1043 {
1044         dbg_info *dbgi = get_dbg_info(&call->expression.source_position);
1045
1046         assert(call->function->type == EXPR_BUILTIN_SYMBOL);
1047         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1048
1049         type_t *type = skip_typeref(builtin->expression.datatype);
1050         assert(is_type_pointer(type));
1051
1052         type_t   *function_type = skip_typeref(type->pointer.points_to);
1053         symbol_t *symbol        = builtin->symbol;
1054
1055         switch(symbol->ID) {
1056         case T___builtin_alloca: {
1057                 if(call->arguments == NULL || call->arguments->next != NULL) {
1058                         panic("invalid number of parameters on __builtin_alloca");
1059                 }
1060                 expression_t *argument = call->arguments->expression;
1061                 ir_node      *size     = expression_to_firm(argument);
1062
1063                 ir_node *store  = get_store();
1064                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1065                                               stack_alloc);
1066                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1067                 set_store(proj_m);
1068                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1069
1070                 return res;
1071         }
1072         case T___builtin_nan:
1073         case T___builtin_nanf:
1074         case T___builtin_nand: {
1075                 /* Ignore string for now... */
1076                 assert(is_type_function(function_type));
1077                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1078                 tarval  *tv   = get_mode_NAN(mode);
1079                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1080                 return res;
1081         }
1082         case T___builtin_va_end:
1083                 return NULL;
1084         default:
1085                 panic("Unsupported builtin found\n");
1086         }
1087 }
1088
1089 static ir_node *call_expression_to_firm(const call_expression_t *call)
1090 {
1091         assert(get_cur_block() != NULL);
1092
1093         expression_t *function = call->function;
1094         if(function->type == EXPR_BUILTIN_SYMBOL) {
1095                 return process_builtin_call(call);
1096         }
1097         ir_node *callee = expression_to_firm(function);
1098
1099         type_t *type = skip_typeref(function->base.datatype);
1100         assert(is_type_pointer(type));
1101         pointer_type_t *pointer_type = &type->pointer;
1102         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1103         assert(is_type_function(points_to));
1104         function_type_t *function_type = &points_to->function;
1105
1106         int              n_parameters = 0;
1107         call_argument_t *argument     = call->arguments;
1108         for( ; argument != NULL; argument = argument->next) {
1109                 ++n_parameters;
1110         }
1111
1112         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
1113
1114         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1115         ir_type *new_method_type = NULL;
1116         if(function_type->variadic || function_type->unspecified_parameters) {
1117                 /* we need to construct a new method type matching the call
1118                  * arguments... */
1119                 int n_res       = get_method_n_ress(ir_method_type);
1120                 new_method_type = new_type_method(unique_ident("calltype"),
1121                                                   n_parameters, n_res);
1122                 set_method_calling_convention(new_method_type,
1123                                get_method_calling_convention(ir_method_type));
1124                 set_method_additional_properties(new_method_type,
1125                                get_method_additional_properties(ir_method_type));
1126
1127                 for(int i = 0; i < n_res; ++i) {
1128                         set_method_res_type(new_method_type, i,
1129                                             get_method_res_type(ir_method_type, i));
1130                 }
1131         }
1132         ir_node *in[n_parameters];
1133
1134         argument = call->arguments;
1135         int n = 0;
1136         for( ; argument != NULL; argument = argument->next) {
1137                 expression_t *expression = argument->expression;
1138                 ir_node      *arg_node   = expression_to_firm(expression);
1139
1140                 arg_node = do_strict_conv(dbgi, arg_node);
1141
1142                 in[n] = arg_node;
1143                 if(new_method_type != NULL) {
1144                         ir_type *irtype = get_ir_type(expression->base.datatype);
1145                         set_method_param_type(new_method_type, n, irtype);
1146                 }
1147
1148                 n++;
1149         }
1150         assert(n == n_parameters);
1151
1152         if(new_method_type != NULL)
1153                 ir_method_type = new_method_type;
1154
1155         ir_node  *store = get_store();
1156         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1157                                      ir_method_type);
1158         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1159         set_store(mem);
1160
1161         type_t  *return_type = skip_typeref(function_type->return_type);
1162         ir_node *result      = NULL;
1163
1164         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1165                 ir_mode *mode;
1166                 if(is_type_scalar(return_type)) {
1167                         mode = get_ir_mode(return_type);
1168                 } else {
1169                         mode = mode_P_data;
1170                 }
1171                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1172                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1173         }
1174
1175         return result;
1176 }
1177
1178 static void statement_to_firm(statement_t *statement);
1179 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1180
1181 static ir_node *expression_to_addr(const expression_t *expression);
1182 static void create_condition_evaluation(const expression_t *expression,
1183                                         ir_node *true_block,
1184                                         ir_node *false_block);
1185
1186 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1187                          ir_node *value)
1188 {
1189         value = do_strict_conv(dbgi, value);
1190
1191         ir_node  *memory = get_store();
1192
1193         if(is_type_scalar(type)) {
1194                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1195                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1196                 set_store(store_mem);
1197         } else {
1198                 ir_type *irtype    = get_ir_type(type);
1199                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1200                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1201                 set_store(copyb_mem);
1202         }
1203 }
1204
1205 static void set_value_for_expression(const expression_t *expression,
1206                                      ir_node *value)
1207 {
1208         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1209         value          = do_strict_conv(dbgi, value);
1210
1211         if(expression->type == EXPR_REFERENCE) {
1212                 reference_expression_t *ref = (reference_expression_t*) expression;
1213
1214                 declaration_t *declaration = ref->declaration;
1215                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
1216                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
1217                         set_value(declaration->v.value_number, value);
1218                         return;
1219                 }
1220         }
1221
1222         ir_node *addr = expression_to_addr(expression);
1223         type_t  *type = skip_typeref(expression->base.datatype);
1224         assign_value(dbgi, addr, type, value);
1225 }
1226
1227 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1228 {
1229         ir_mode *value_mode = get_irn_mode(value);
1230
1231         if (value_mode == dest_mode || is_Bad(value))
1232                 return value;
1233
1234         if(dest_mode == mode_b) {
1235                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1236                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1237                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1238                 return proj;
1239         }
1240
1241         return new_d_Conv(dbgi, value, dest_mode);
1242 }
1243
1244 static ir_node *create_incdec(const unary_expression_t *expression)
1245 {
1246         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
1247         type_t       *type  = skip_typeref(expression->expression.datatype);
1248         ir_mode      *mode  = get_ir_mode(type);
1249         expression_t *value = expression->value;
1250
1251         ir_node *value_node = expression_to_firm(value);
1252
1253         ir_node *offset;
1254         if(is_type_pointer(type)) {
1255                 pointer_type_t *pointer_type = &type->pointer;
1256                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
1257                 offset = new_Const_long(mode_int, elem_size);
1258         } else {
1259                 assert(is_type_arithmetic(type));
1260                 offset = new_Const(mode, get_mode_one(mode));
1261         }
1262
1263         switch(expression->expression.type) {
1264         case EXPR_UNARY_POSTFIX_INCREMENT: {
1265                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1266                 set_value_for_expression(value, new_value);
1267                 return value_node;
1268         }
1269         case EXPR_UNARY_POSTFIX_DECREMENT: {
1270                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1271                 set_value_for_expression(value, new_value);
1272                 return value_node;
1273         }
1274         case EXPR_UNARY_PREFIX_INCREMENT: {
1275                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1276                 set_value_for_expression(value, new_value);
1277                 return new_value;
1278         }
1279         case EXPR_UNARY_PREFIX_DECREMENT: {
1280                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1281                 set_value_for_expression(value, new_value);
1282                 return new_value;
1283         }
1284         default:
1285                 panic("no incdec expr in create_incdec");
1286                 return NULL;
1287         }
1288 }
1289
1290 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1291 {
1292         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1293         type_t   *type = skip_typeref(expression->expression.datatype);
1294
1295         if(expression->expression.type == EXPR_UNARY_TAKE_ADDRESS)
1296                 return expression_to_addr(expression->value);
1297
1298         const expression_t *value      = expression->value;
1299         ir_node            *value_node = expression_to_firm(value);
1300
1301         switch(expression->expression.type) {
1302         case EXPR_UNARY_NEGATE: {
1303                 ir_mode *mode = get_ir_mode(type);
1304                 return new_d_Minus(dbgi, value_node, mode);
1305         }
1306         case EXPR_UNARY_PLUS:
1307                 return value_node;
1308         case EXPR_UNARY_BITWISE_NEGATE: {
1309                 ir_mode *mode = get_ir_mode(type);
1310                 return new_d_Not(dbgi, value_node, mode);
1311         }
1312         case EXPR_UNARY_NOT: {
1313                 ir_mode *mode = get_ir_mode(type);
1314                 if(get_irn_mode(value_node) != mode_b) {
1315                         value_node = create_conv(dbgi, value_node, mode_b);
1316                 }
1317                 value_node = new_d_Not(dbgi, value_node, mode_b);
1318                 if(mode != mode_b) {
1319                         value_node = create_conv(dbgi, value_node, mode);
1320                 }
1321                 return value_node;
1322         }
1323         case EXPR_UNARY_DEREFERENCE: {
1324                 type_t  *value_type = skip_typeref(value->base.datatype);
1325                 ir_type *irtype     = get_ir_type(value_type);
1326                 assert(is_Pointer_type(irtype));
1327                 ir_type *points_to  = get_pointer_points_to_type(irtype);
1328                 return deref_address(points_to, value_node, dbgi);
1329         }
1330         case EXPR_UNARY_POSTFIX_INCREMENT:
1331         case EXPR_UNARY_POSTFIX_DECREMENT:
1332         case EXPR_UNARY_PREFIX_INCREMENT:
1333         case EXPR_UNARY_PREFIX_DECREMENT:
1334                 return create_incdec(expression);
1335         case EXPR_UNARY_CAST: {
1336                 ir_mode *mode = get_ir_mode(type);
1337                 ir_node *node = create_conv(dbgi, value_node, mode);
1338                 node = do_strict_conv(dbgi, node);
1339                 return node;
1340         }
1341         case EXPR_UNARY_CAST_IMPLICIT: {
1342                 ir_mode *mode = get_ir_mode(type);
1343                 return create_conv(dbgi, value_node, mode);
1344         }
1345
1346         default:
1347                 break;
1348         }
1349         panic("invalid UNEXPR type found");
1350 }
1351
1352 static long get_pnc(const expression_type_t type)
1353 {
1354         switch(type) {
1355         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1356         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1357         case EXPR_BINARY_NOTEQUAL:      return pn_Cmp_Ne;
1358         case EXPR_BINARY_ISLESS:
1359         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1360         case EXPR_BINARY_ISLESSEQUAL:
1361         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1362         case EXPR_BINARY_ISGREATER:
1363         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1364         case EXPR_BINARY_ISGREATEREQUAL:
1365         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1366         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1367
1368         default:
1369                 break;
1370         }
1371         panic("trying to get pn_Cmp from non-comparison binexpr type");
1372 }
1373
1374 static ir_node *create_lazy_op(const binary_expression_t *expression)
1375 {
1376         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1377         type_t   *type = expression->expression.datatype;
1378         ir_mode  *mode = get_ir_mode(type);
1379
1380         if(is_constant_expression(expression->left)) {
1381                 long val = fold_constant(expression->left);
1382                 expression_type_t etype = expression->expression.type;
1383                 if((etype == EXPR_BINARY_LOGICAL_AND && val != 0)
1384                                 || (etype == EXPR_BINARY_LOGICAL_OR && val == 0)) {
1385                         return expression_to_firm(expression->right);
1386                 } else {
1387                         assert((etype == EXPR_BINARY_LOGICAL_AND && val == 0)
1388                                         || (etype == EXPR_BINARY_LOGICAL_OR && val != 0));
1389                         return new_Const(mode, get_mode_one(mode));
1390                 }
1391         }
1392
1393         ir_node *cur_block = get_cur_block();
1394
1395         ir_node *one_block = new_immBlock();
1396         ir_node *one       = new_Const(mode, get_mode_one(mode));
1397         ir_node *jmp_one   = new_d_Jmp(dbgi);
1398
1399         ir_node *zero_block = new_immBlock();
1400         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1401         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1402
1403         set_cur_block(cur_block);
1404         create_condition_evaluation((const expression_t*) expression,
1405                                     one_block, zero_block);
1406         mature_immBlock(one_block);
1407         mature_immBlock(zero_block);
1408
1409         ir_node *common_block = new_immBlock();
1410         add_immBlock_pred(common_block, jmp_one);
1411         add_immBlock_pred(common_block, jmp_zero);
1412         mature_immBlock(common_block);
1413
1414         ir_node *in[2] = { one, zero };
1415         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1416
1417         return val;
1418 }
1419
1420 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1421                                             ir_node *right, ir_mode *mode);
1422
1423 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1424                                         create_arithmetic_func func)
1425 {
1426         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1427         ir_node  *left  = expression_to_firm(expression->left);
1428         ir_node  *right = expression_to_firm(expression->right);
1429         type_t   *type  = expression->right->base.datatype;
1430         /* be careful with the modes, because in arithmetic assign nodes only
1431          * the right operand has the mode of the arithmetic already */
1432         ir_mode  *mode  = get_ir_mode(type);
1433         left            = create_conv(dbgi, left, mode);
1434         ir_node  *res   = func(dbgi, left, right, mode);
1435
1436         return res;
1437 }
1438
1439 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1440                                    ir_node  *      integer,
1441                                    type_t   *const type,
1442                                    dbg_info *const dbgi,
1443                                    const create_arithmetic_func func)
1444 {
1445         pointer_type_t *const pointer_type = (pointer_type_t*)type;
1446         type_t         *const points_to    = pointer_type->points_to;
1447         const unsigned        elem_size    = get_type_size(points_to);
1448
1449         assert(elem_size >= 1);
1450         if (elem_size > 1) {
1451                 integer             = create_conv(dbgi, integer, mode_int);
1452                 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
1453                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_int);
1454                 integer = mul;
1455         }
1456
1457         ir_mode *const mode = get_ir_mode(type);
1458         return func(dbgi, pointer, integer, mode);
1459 }
1460
1461 static ir_node *create_arithmetic_assign_binop(
1462                 const binary_expression_t *expression, create_arithmetic_func func)
1463 {
1464         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1465         type_t   *const type = skip_typeref(expression->expression.datatype);
1466         ir_node  *value;
1467
1468         if (is_type_pointer(type)) {
1469                 ir_node        *const pointer = expression_to_firm(expression->left);
1470                 ir_node        *      integer = expression_to_firm(expression->right);
1471                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1472         } else {
1473                 value = create_arithmetic_binop(expression, func);
1474         }
1475
1476         ir_mode  *const mode = get_ir_mode(type);
1477         value = create_conv(dbgi, value, mode);
1478         set_value_for_expression(expression->left, value);
1479
1480         return value;
1481 }
1482
1483 static ir_node *create_add(const binary_expression_t *expression)
1484 {
1485         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1486         ir_node  *left  = expression_to_firm(expression->left);
1487         ir_node  *right = expression_to_firm(expression->right);
1488         type_t   *type  = expression->expression.datatype;
1489
1490         expression_t *expr_left  = expression->left;
1491         expression_t *expr_right = expression->right;
1492         type_t       *type_left  = skip_typeref(expr_left->base.datatype);
1493         type_t       *type_right = skip_typeref(expr_right->base.datatype);
1494
1495         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1496                 ir_mode *const mode = get_ir_mode(type);
1497                 return new_d_Add(dbgi, left, right, mode);
1498         }
1499
1500         if (is_type_pointer(type_left)) {
1501                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1502         } else {
1503                 assert(is_type_pointer(type_right));
1504                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1505         }
1506 }
1507
1508 static ir_node *create_sub(const binary_expression_t *expression)
1509 {
1510         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1511         expression_t *const expr_left  = expression->left;
1512         expression_t *const expr_right = expression->right;
1513         ir_node      *const left       = expression_to_firm(expr_left);
1514         ir_node      *const right      = expression_to_firm(expr_right);
1515         type_t       *const type       = expression->expression.datatype;
1516         type_t       *const type_left  = skip_typeref(expr_left->base.datatype);
1517         type_t       *const type_right = skip_typeref(expr_right->base.datatype);
1518
1519         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1520                 ir_mode *const mode = get_ir_mode(type);
1521                 return new_d_Sub(dbgi, left, right, mode);
1522         } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
1523                 const pointer_type_t *const ptr_type = &type_left->pointer;
1524                 const unsigned elem_size             = get_type_size(ptr_type->points_to);
1525                 ir_mode *const mode   = get_ir_mode(type);
1526                 ir_node *const sub    = new_d_Sub(dbgi, left, right, mode);
1527                 ir_node *const cnst   = new_Const_long(mode_int, (long)elem_size);
1528                 ir_node *const no_mem = new_NoMem();
1529                 ir_node *const div    = new_d_Div(dbgi, no_mem, sub, cnst, mode,
1530                                                   op_pin_state_floats);
1531                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
1532         }
1533
1534         assert(is_type_pointer(type_left));
1535         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1536 }
1537
1538 static ir_node *create_shift(const binary_expression_t *expression)
1539 {
1540         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1541         ir_node  *left  = expression_to_firm(expression->left);
1542         ir_node  *right = expression_to_firm(expression->right);
1543         type_t   *type  = expression->expression.datatype;
1544         ir_mode  *mode  = get_ir_mode(type);
1545
1546         /* firm always wants the shift count to be unsigned */
1547         right = create_conv(dbgi, right, mode_uint);
1548
1549         ir_node *res;
1550
1551         switch(expression->expression.type) {
1552         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1553         case EXPR_BINARY_SHIFTLEFT:
1554                 res = new_d_Shl(dbgi, left, right, mode);
1555                 break;
1556         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1557         case EXPR_BINARY_SHIFTRIGHT: {
1558                  expression_t *expr_left = expression->left;
1559                  type_t       *type_left = skip_typeref(expr_left->base.datatype);
1560
1561                  if(is_type_signed(type_left)) {
1562                         res = new_d_Shrs(dbgi, left, right, mode);
1563                  } else {
1564                          res = new_d_Shr(dbgi, left, right, mode);
1565                  }
1566                  break;
1567         }
1568         default:
1569                 panic("create shift op called for non-shift op");
1570         }
1571
1572         return res;
1573 }
1574
1575
1576 static ir_node *create_divmod(const binary_expression_t *expression)
1577 {
1578         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1579         ir_node  *left  = expression_to_firm(expression->left);
1580         ir_node  *right = expression_to_firm(expression->right);
1581         ir_node  *pin   = new_Pin(new_NoMem());
1582         /* be careful with the modes, because in arithmetic assign nodes only
1583          * the right operand has the mode of the arithmetic already */
1584         type_t   *type  = expression->right->base.datatype;
1585         ir_mode  *mode  = get_ir_mode(type);
1586         left            = create_conv(dbgi, left, mode);
1587         ir_node  *op;
1588         ir_node  *res;
1589
1590         switch (expression->expression.type) {
1591         case EXPR_BINARY_DIV:
1592         case EXPR_BINARY_DIV_ASSIGN:
1593                 if(mode_is_float(mode)) {
1594                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1595                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1596                 } else {
1597                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1598                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1599                 }
1600                 break;
1601
1602         case EXPR_BINARY_MOD:
1603         case EXPR_BINARY_MOD_ASSIGN:
1604                 assert(!mode_is_float(mode));
1605                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1606                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1607                 break;
1608
1609         default: panic("unexpected binary expression type in create_divmod()");
1610         }
1611
1612         return res;
1613 }
1614
1615 static ir_node *create_arithmetic_assign_divmod(
1616                 const binary_expression_t *expression)
1617 {
1618         ir_node  *      value = create_divmod(expression);
1619         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1620         type_t   *const type  = expression->expression.datatype;
1621         ir_mode  *const mode  = get_ir_mode(type);
1622
1623         assert(type->type != TYPE_POINTER);
1624
1625         value = create_conv(dbgi, value, mode);
1626         set_value_for_expression(expression->left, value);
1627
1628         return value;
1629 }
1630
1631 static ir_node *create_arithmetic_assign_shift(
1632                 const binary_expression_t *expression)
1633 {
1634         ir_node  *      value = create_shift(expression);
1635         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1636         type_t   *const type  = expression->expression.datatype;
1637         ir_mode  *const mode  = get_ir_mode(type);
1638
1639         value = create_conv(dbgi, value, mode);
1640         set_value_for_expression(expression->left, value);
1641
1642         return value;
1643 }
1644
1645 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1646 {
1647         expression_type_t type = expression->expression.type;
1648
1649         switch(type) {
1650         case EXPR_BINARY_EQUAL:
1651         case EXPR_BINARY_NOTEQUAL:
1652         case EXPR_BINARY_LESS:
1653         case EXPR_BINARY_LESSEQUAL:
1654         case EXPR_BINARY_GREATER:
1655         case EXPR_BINARY_GREATEREQUAL:
1656         case EXPR_BINARY_ISGREATER:
1657         case EXPR_BINARY_ISGREATEREQUAL:
1658         case EXPR_BINARY_ISLESS:
1659         case EXPR_BINARY_ISLESSEQUAL:
1660         case EXPR_BINARY_ISLESSGREATER:
1661         case EXPR_BINARY_ISUNORDERED: {
1662                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1663                 ir_node *left  = expression_to_firm(expression->left);
1664                 ir_node *right = expression_to_firm(expression->right);
1665                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1666                 long     pnc   = get_pnc(type);
1667                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1668                 return proj;
1669         }
1670         case EXPR_BINARY_ASSIGN: {
1671                 ir_node *right = expression_to_firm(expression->right);
1672                 set_value_for_expression(expression->left, right);
1673
1674                 return right;
1675         }
1676         case EXPR_BINARY_ADD:
1677                 return create_add(expression);
1678         case EXPR_BINARY_SUB:
1679                 return create_sub(expression);
1680         case EXPR_BINARY_MUL:
1681                 return create_arithmetic_binop(expression, new_d_Mul);
1682         case EXPR_BINARY_BITWISE_AND:
1683                 return create_arithmetic_binop(expression, new_d_And);
1684         case EXPR_BINARY_BITWISE_OR:
1685                 return create_arithmetic_binop(expression, new_d_Or);
1686         case EXPR_BINARY_BITWISE_XOR:
1687                 return create_arithmetic_binop(expression, new_d_Eor);
1688         case EXPR_BINARY_SHIFTLEFT:
1689         case EXPR_BINARY_SHIFTRIGHT:
1690                 return create_shift(expression);
1691         case EXPR_BINARY_DIV:
1692         case EXPR_BINARY_MOD:
1693                 return create_divmod(expression);
1694         case EXPR_BINARY_LOGICAL_AND:
1695         case EXPR_BINARY_LOGICAL_OR:
1696                 return create_lazy_op(expression);
1697         case EXPR_BINARY_COMMA:
1698                 expression_to_firm(expression->left);
1699                 return expression_to_firm(expression->right);
1700         case EXPR_BINARY_ADD_ASSIGN:
1701                 return create_arithmetic_assign_binop(expression, new_d_Add);
1702         case EXPR_BINARY_SUB_ASSIGN:
1703                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1704         case EXPR_BINARY_MUL_ASSIGN:
1705                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1706         case EXPR_BINARY_DIV_ASSIGN:
1707                 return create_arithmetic_assign_divmod(expression);
1708         case EXPR_BINARY_BITWISE_AND_ASSIGN:
1709                 return create_arithmetic_assign_binop(expression, new_d_And);
1710         case EXPR_BINARY_BITWISE_OR_ASSIGN:
1711                 return create_arithmetic_assign_binop(expression, new_d_Or);
1712         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
1713                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1714         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1715         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1716                 return create_arithmetic_assign_shift(expression);
1717         case EXPR_BINARY_BUILTIN_EXPECT:
1718                 return expression_to_firm(expression->left);
1719         default:
1720                 panic("TODO binexpr type");
1721         }
1722 }
1723
1724 static ir_node *array_access_addr(const array_access_expression_t *expression)
1725 {
1726         dbg_info *dbgi      = get_dbg_info(&expression->expression.source_position);
1727         ir_node  *base_addr = expression_to_firm(expression->array_ref);
1728         ir_node  *offset    = expression_to_firm(expression->index);
1729         offset              = create_conv(dbgi, offset, mode_uint);
1730
1731         type_t *ref_type = skip_typeref(expression->array_ref->base.datatype);
1732         assert(is_type_pointer(ref_type));
1733         pointer_type_t *pointer_type = (pointer_type_t*) ref_type;
1734
1735         unsigned elem_size       = get_type_size(pointer_type->points_to);
1736         ir_node *elem_size_const = new_Const_long(mode_uint, elem_size);
1737         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1738                                              mode_uint);
1739         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
1740
1741         return result;
1742 }
1743
1744 static ir_node *array_access_to_firm(
1745                 const array_access_expression_t *expression)
1746 {
1747         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1748         ir_node  *addr   = array_access_addr(expression);
1749         type_t   *type   = revert_automatic_type_conversion(
1750                         (const expression_t*) expression);
1751         type             = skip_typeref(type);
1752         ir_type  *irtype = get_ir_type(type);
1753
1754         return deref_address(irtype, addr, dbgi);
1755 }
1756
1757 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1758 {
1759         type_t *type = expression->type;
1760         if(type == NULL) {
1761                 type = expression->size_expression->base.datatype;
1762                 assert(type != NULL);
1763         }
1764
1765         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1766         unsigned  size      = get_type_size(type);
1767         ir_node  *size_node = new_Const_long(mode, size);
1768
1769         return size_node;
1770 }
1771
1772 static long fold_constant(const expression_t *expression)
1773 {
1774         assert(is_constant_expression(expression));
1775
1776         ir_graph *old_current_ir_graph = current_ir_graph;
1777         if(current_ir_graph == NULL) {
1778                 current_ir_graph = get_const_code_irg();
1779         }
1780
1781         ir_node *cnst = expression_to_firm(expression);
1782         current_ir_graph = old_current_ir_graph;
1783
1784         if(!is_Const(cnst)) {
1785                 panic("couldn't fold constant\n");
1786         }
1787
1788         tarval *tv = get_Const_tarval(cnst);
1789         if(!tarval_is_long(tv)) {
1790                 panic("result of constant folding is not integer\n");
1791         }
1792
1793         return get_tarval_long(tv);
1794 }
1795
1796 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1797 {
1798         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1799
1800         /* first try to fold a constant condition */
1801         if(is_constant_expression(expression->condition)) {
1802                 long val = fold_constant(expression->condition);
1803                 if(val) {
1804                         return expression_to_firm(expression->true_expression);
1805                 } else {
1806                         return expression_to_firm(expression->false_expression);
1807                 }
1808         }
1809
1810         ir_node *cur_block   = get_cur_block();
1811
1812         /* create the true block */
1813         ir_node *true_block  = new_immBlock();
1814
1815         ir_node *true_val = expression_to_firm(expression->true_expression);
1816         ir_node *true_jmp = new_Jmp();
1817
1818         /* create the false block */
1819         ir_node *false_block = new_immBlock();
1820
1821         ir_node *false_val = expression_to_firm(expression->false_expression);
1822         ir_node *false_jmp = new_Jmp();
1823
1824         /* create the condition evaluation */
1825         set_cur_block(cur_block);
1826         create_condition_evaluation(expression->condition, true_block, false_block);
1827         mature_immBlock(true_block);
1828         mature_immBlock(false_block);
1829
1830         /* create the common block */
1831         ir_node *common_block = new_immBlock();
1832         add_immBlock_pred(common_block, true_jmp);
1833         add_immBlock_pred(common_block, false_jmp);
1834         mature_immBlock(common_block);
1835
1836         /* TODO improve static semantics, so either both or no values are NULL */
1837         if (true_val == NULL || false_val == NULL)
1838                 return NULL;
1839
1840         ir_node *in[2] = { true_val, false_val };
1841         ir_mode *mode  = get_irn_mode(true_val);
1842         assert(get_irn_mode(false_val) == mode);
1843         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1844
1845         return val;
1846 }
1847
1848 static ir_node *select_addr(const select_expression_t *expression)
1849 {
1850         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1851
1852         ir_node *compound_addr = expression_to_firm(expression->compound);
1853
1854         declaration_t *entry = expression->compound_entry;
1855         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1856         ir_entity     *entity = entry->v.entity;
1857
1858         assert(entity != NULL);
1859
1860         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1861
1862         return sel;
1863 }
1864
1865 static ir_node *select_to_firm(const select_expression_t *expression)
1866 {
1867         dbg_info *dbgi   = get_dbg_info(&expression->expression.source_position);
1868         ir_node  *addr   = select_addr(expression);
1869         type_t   *type   = revert_automatic_type_conversion(
1870                         (const expression_t*) expression);
1871         type             = skip_typeref(type);
1872         ir_type  *irtype = get_ir_type(type);
1873
1874         return deref_address(irtype, addr, dbgi);
1875 }
1876
1877 /* Values returned by __builtin_classify_type. */
1878 typedef enum gcc_type_class
1879 {
1880         no_type_class = -1,
1881         void_type_class,
1882         integer_type_class,
1883         char_type_class,
1884         enumeral_type_class,
1885         boolean_type_class,
1886         pointer_type_class,
1887         reference_type_class,
1888         offset_type_class,
1889         real_type_class,
1890         complex_type_class,
1891         function_type_class,
1892         method_type_class,
1893         record_type_class,
1894         union_type_class,
1895         array_type_class,
1896         string_type_class,
1897         set_type_class,
1898         file_type_class,
1899         lang_type_class
1900 } gcc_type_class;
1901
1902 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
1903 {
1904         const type_t *const type = expr->type_expression->base.datatype;
1905
1906         gcc_type_class tc;
1907         switch (type->type)
1908         {
1909                 case TYPE_ATOMIC: {
1910                         const atomic_type_t *const atomic_type = &type->atomic;
1911                         switch (atomic_type->atype) {
1912                                 /* should not be reached */
1913                                 case ATOMIC_TYPE_INVALID:
1914                                         tc = no_type_class;
1915                                         break;
1916
1917                                 /* gcc cannot do that */
1918                                 case ATOMIC_TYPE_VOID:
1919                                         tc = void_type_class;
1920                                         break;
1921
1922                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
1923                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
1924                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
1925                                 case ATOMIC_TYPE_SHORT:
1926                                 case ATOMIC_TYPE_USHORT:
1927                                 case ATOMIC_TYPE_INT:
1928                                 case ATOMIC_TYPE_UINT:
1929                                 case ATOMIC_TYPE_LONG:
1930                                 case ATOMIC_TYPE_ULONG:
1931                                 case ATOMIC_TYPE_LONGLONG:
1932                                 case ATOMIC_TYPE_ULONGLONG:
1933                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
1934                                         tc = integer_type_class;
1935                                         break;
1936
1937                                 case ATOMIC_TYPE_FLOAT:
1938                                 case ATOMIC_TYPE_DOUBLE:
1939                                 case ATOMIC_TYPE_LONG_DOUBLE:
1940                                         tc = real_type_class;
1941                                         break;
1942
1943 #ifdef PROVIDE_COMPLEX
1944                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
1945                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
1946                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
1947                                         tc = complex_type_class;
1948                                         break;
1949                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
1950                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
1951                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
1952                                         tc = complex_type_class;
1953                                         break;
1954 #endif
1955
1956                                 default:
1957                                         panic("Unimplemented case in classify_type_to_firm().");
1958                         }
1959                         break;
1960                 }
1961
1962                 case TYPE_ARRAY:           /* gcc handles this as pointer */
1963                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
1964                 case TYPE_POINTER:         tc = pointer_type_class; break;
1965                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
1966                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
1967
1968                 /* gcc handles this as integer */
1969                 case TYPE_ENUM:            tc = integer_type_class; break;
1970
1971                 default:
1972                         panic("Unimplemented case in classify_type_to_firm().");
1973         }
1974
1975         dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
1976         ir_mode  *const mode = mode_int;
1977         tarval   *const tv   = new_tarval_from_long(tc, mode);
1978         return new_d_Const(dbgi, mode, tv);
1979 }
1980
1981 static ir_node *function_name_to_firm(
1982                 const string_literal_expression_t *const expr)
1983 {
1984         if (current_function_name == NULL) {
1985                 const source_position_t *const src_pos =
1986                         &expr->expression.source_position;
1987                 const char *const name = current_function_decl->symbol->string;
1988                 current_function_name = string_to_firm(src_pos, "__func__", name);
1989         }
1990
1991         return current_function_name;
1992 }
1993
1994 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
1995 {
1996         statement_t *statement = expr->statement;
1997
1998         assert(statement->type == STATEMENT_COMPOUND);
1999         return compound_statement_to_firm((compound_statement_t*) statement);
2000 }
2001
2002 static ir_node *va_start_expression_to_firm(
2003         const va_start_expression_t *const expr)
2004 {
2005         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2006         int        const n           = get_method_n_params(method_type) - 1;
2007         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2008         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2009         dbg_info  *const dbgi        =
2010                 get_dbg_info(&expr->expression.source_position);
2011         ir_node   *const no_mem      = new_NoMem();
2012         ir_node   *const arg_sel     =
2013                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2014
2015         size_t     const parm_size   = get_type_size(expr->parameter->type);
2016         ir_node   *const cnst        = new_Const_long(mode_uint, parm_size);
2017         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2018         set_value_for_expression(expr->ap, add);
2019
2020         return NULL;
2021 }
2022
2023 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2024 {
2025         ir_type  *const irtype = get_ir_type(expr->expression.datatype);
2026         ir_node  *const ap     = expression_to_firm(expr->ap);
2027         dbg_info *const dbgi   = get_dbg_info(&expr->expression.source_position);
2028         ir_node  *const res    = deref_address(irtype, ap, dbgi);
2029
2030         size_t     const parm_size   = get_type_size(expr->expression.datatype);
2031         ir_node   *const cnst        = new_Const_long(mode_uint, parm_size);
2032         ir_node   *const add         = new_d_Add(dbgi, ap, cnst, mode_P_data);
2033         set_value_for_expression(expr->ap, add);
2034
2035         return res;
2036 }
2037
2038 static ir_node *dereference_addr(const unary_expression_t *const expression)
2039 {
2040         assert(expression->expression.type == EXPR_UNARY_DEREFERENCE);
2041         return expression_to_firm(expression->value);
2042 }
2043
2044 static ir_node *expression_to_addr(const expression_t *expression)
2045 {
2046         switch(expression->type) {
2047         case EXPR_REFERENCE:
2048                 return reference_addr(&expression->reference);
2049         case EXPR_ARRAY_ACCESS:
2050                 return array_access_addr(&expression->array_access);
2051         case EXPR_SELECT:
2052                 return select_addr(&expression->select);
2053         case EXPR_CALL:
2054                 return call_expression_to_firm(&expression->call);
2055         case EXPR_UNARY_DEREFERENCE: {
2056                 return dereference_addr(&expression->unary);
2057         }
2058         default:
2059                 break;
2060         }
2061         panic("trying to get address of non-lvalue");
2062 }
2063
2064 static ir_node *_expression_to_firm(const expression_t *expression)
2065 {
2066         switch(expression->type) {
2067         case EXPR_CONST:
2068                 return const_to_firm(&expression->conste);
2069         case EXPR_STRING_LITERAL:
2070                 return string_literal_to_firm(&expression->string);
2071         case EXPR_WIDE_STRING_LITERAL:
2072                 return wide_string_literal_to_firm(&expression->wide_string);
2073         case EXPR_REFERENCE:
2074                 return reference_expression_to_firm(&expression->reference);
2075         case EXPR_CALL:
2076                 return call_expression_to_firm(&expression->call);
2077         EXPR_UNARY_CASES
2078                 return unary_expression_to_firm(&expression->unary);
2079         EXPR_BINARY_CASES
2080                 return binary_expression_to_firm(&expression->binary);
2081         case EXPR_ARRAY_ACCESS:
2082                 return array_access_to_firm(&expression->array_access);
2083         case EXPR_SIZEOF:
2084                 return sizeof_to_firm(&expression->sizeofe);
2085         case EXPR_CONDITIONAL:
2086                 return conditional_to_firm(&expression->conditional);
2087         case EXPR_SELECT:
2088                 return select_to_firm(&expression->select);
2089         case EXPR_CLASSIFY_TYPE:
2090                 return classify_type_to_firm(&expression->classify_type);
2091         case EXPR_FUNCTION:
2092         case EXPR_PRETTY_FUNCTION:
2093                 return function_name_to_firm(&expression->string);
2094         case EXPR_STATEMENT:
2095                 return statement_expression_to_firm(&expression->statement);
2096         case EXPR_VA_START:
2097                 return va_start_expression_to_firm(&expression->va_starte);
2098         case EXPR_VA_ARG:
2099                 return va_arg_expression_to_firm(&expression->va_arge);
2100         case EXPR_OFFSETOF:
2101         case EXPR_BUILTIN_SYMBOL:
2102                 panic("unimplemented expression found");
2103
2104         case EXPR_UNKNOWN:
2105         case EXPR_INVALID:
2106                 break;
2107         }
2108         panic("invalid expression found");
2109 }
2110
2111 static ir_node *expression_to_firm(const expression_t *expression)
2112 {
2113         ir_node *res = _expression_to_firm(expression);
2114
2115         if(res != NULL && get_irn_mode(res) == mode_b) {
2116                 ir_mode *mode = get_ir_mode(expression->base.datatype);
2117                 res           = create_conv(NULL, res, mode);
2118         }
2119
2120         return res;
2121 }
2122
2123 static ir_node *expression_to_modeb(const expression_t *expression)
2124 {
2125         ir_node *res = _expression_to_firm(expression);
2126         res          = create_conv(NULL, res, mode_b);
2127
2128         return res;
2129 }
2130
2131 /**
2132  * create a short-circuit expression evaluation that tries to construct
2133  * efficient control flow structures for &&, || and ! expressions
2134  */
2135 static void create_condition_evaluation(const expression_t *expression,
2136                                         ir_node *true_block,
2137                                         ir_node *false_block)
2138 {
2139         switch(expression->type) {
2140         case EXPR_UNARY_NOT: {
2141                 const unary_expression_t *unary_expression = &expression->unary;
2142                 create_condition_evaluation(unary_expression->value, false_block,
2143                                             true_block);
2144                 return;
2145         }
2146         case EXPR_BINARY_LOGICAL_AND: {
2147                 const binary_expression_t *binary_expression = &expression->binary;
2148
2149                 ir_node *cur_block   = get_cur_block();
2150                 ir_node *extra_block = new_immBlock();
2151                 set_cur_block(cur_block);
2152                 create_condition_evaluation(binary_expression->left, extra_block,
2153                                             false_block);
2154                 mature_immBlock(extra_block);
2155                 set_cur_block(extra_block);
2156                 create_condition_evaluation(binary_expression->right, true_block,
2157                                             false_block);
2158                 return;
2159         }
2160         case EXPR_BINARY_LOGICAL_OR: {
2161                 const binary_expression_t *binary_expression = &expression->binary;
2162
2163                 ir_node *cur_block   = get_cur_block();
2164                 ir_node *extra_block = new_immBlock();
2165                 set_cur_block(cur_block);
2166                 create_condition_evaluation(binary_expression->left, true_block,
2167                                             extra_block);
2168                 mature_immBlock(extra_block);
2169                 set_cur_block(extra_block);
2170                 create_condition_evaluation(binary_expression->right, true_block,
2171                                             false_block);
2172                 return;
2173         }
2174         default:
2175                 break;
2176         }
2177
2178         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
2179         ir_node  *condition  = expression_to_modeb(expression);
2180         ir_node  *cond       = new_d_Cond(dbgi, condition);
2181         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2182         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2183
2184         add_immBlock_pred(true_block, true_proj);
2185         add_immBlock_pred(false_block, false_proj);
2186
2187         set_cur_block(NULL);
2188 }
2189
2190
2191
2192 static void create_declaration_entity(declaration_t *declaration,
2193                                       declaration_type_t declaration_type,
2194                                       ir_type *parent_type)
2195 {
2196         ident     *const id     = new_id_from_str(declaration->symbol->string);
2197         ir_type   *const irtype = get_ir_type(declaration->type);
2198         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
2199         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
2200         set_entity_ld_ident(entity, id);
2201
2202         declaration->declaration_type = (unsigned char) declaration_type;
2203         declaration->v.entity         = entity;
2204         set_entity_variability(entity, variability_uninitialized);
2205         if(parent_type == get_tls_type())
2206                 set_entity_allocation(entity, allocation_automatic);
2207         else if(declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE)
2208                 set_entity_allocation(entity, allocation_static);
2209         /* TODO: visibility? */
2210 }
2211
2212 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
2213
2214 enum compound_graph_entry_type_t {
2215         COMPOUND_GRAPH_ENTRY_ARRAY,
2216         COMPOUND_GRAPH_ENTRY_COMPOUND
2217 };
2218
2219 struct compound_graph_path_entry_t {
2220         int type;
2221         union {
2222                 ir_entity *entity;
2223                 int        array_index;
2224         } v;
2225         compound_graph_path_entry_t *prev;
2226 };
2227
2228 static void create_initializer_object(initializer_t *initializer, type_t *type,
2229                 ir_entity *entity, compound_graph_path_entry_t *entry, int len);
2230
2231 static compound_graph_path *create_compound_path(ir_type *type,
2232                 compound_graph_path_entry_t *entry, int len)
2233 {
2234         compound_graph_path *path = new_compound_graph_path(type, len);
2235
2236         int i = len - 1;
2237         for( ; entry != NULL; entry = entry->prev, --i) {
2238                 assert(i >= 0);
2239                 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
2240                         set_compound_graph_path_node(path, i, entry->v.entity);
2241                 } else {
2242                         assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
2243                         set_compound_graph_path_array_index(path, i, entry->v.array_index);
2244                 }
2245         }
2246         assert(i == -1);
2247
2248         return path;
2249 }
2250
2251 static void create_initializer_value(initializer_value_t *initializer,
2252                                      ir_entity *entity,
2253                                      compound_graph_path_entry_t *entry,
2254                                      int len)
2255 {
2256         ir_node             *node = expression_to_firm(initializer->value);
2257         ir_type             *type = get_entity_type(entity);
2258         compound_graph_path *path = create_compound_path(type, entry, len);
2259         add_compound_ent_value_w_path(entity, node, path);
2260 }
2261
2262 static void create_initializer_compound(initializer_list_t *initializer,
2263                                         compound_type_t *type,
2264                                         ir_entity *entity,
2265                                         compound_graph_path_entry_t *last_entry,
2266                                         int len)
2267 {
2268         declaration_t *compound_declaration = type->declaration;
2269
2270         declaration_t *compound_entry = compound_declaration->context.declarations;
2271
2272         compound_graph_path_entry_t entry;
2273         entry.type = COMPOUND_GRAPH_ENTRY_COMPOUND;
2274         entry.prev = last_entry;
2275         ++len;
2276
2277         size_t i = 0;
2278         for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
2279                 if(compound_entry->symbol == NULL)
2280                         continue;
2281                 if(compound_entry->namespc != NAMESPACE_NORMAL)
2282                         continue;
2283
2284                 if(i >= initializer->len)
2285                         break;
2286
2287                 entry.v.entity = compound_entry->v.entity;
2288
2289                 initializer_t *sub_initializer = initializer->initializers[i];
2290
2291                 assert(compound_entry != NULL);
2292                 assert(compound_entry->declaration_type
2293                                 == DECLARATION_TYPE_COMPOUND_MEMBER);
2294
2295                 if(sub_initializer->type == INITIALIZER_VALUE) {
2296                         create_initializer_value(&sub_initializer->value,
2297                                                  entity, &entry, len);
2298                 } else {
2299                         type_t *entry_type = skip_typeref(compound_entry->type);
2300                         create_initializer_object(sub_initializer, entry_type, entity,
2301                                                   &entry, len);
2302                 }
2303
2304                 ++i;
2305         }
2306 }
2307
2308 static void create_initializer_array(initializer_list_t *initializer,
2309                                      array_type_t *type, ir_entity *entity,
2310                                      compound_graph_path_entry_t *last_entry,
2311                                      int len)
2312 {
2313         type_t *element_type = type->element_type;
2314         element_type         = skip_typeref(element_type);
2315
2316         compound_graph_path_entry_t entry;
2317         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2318         entry.prev = last_entry;
2319         ++len;
2320
2321         size_t i;
2322         for(i = 0; i < initializer->len; ++i) {
2323                 entry.v.array_index = i;
2324
2325                 initializer_t *sub_initializer = initializer->initializers[i];
2326
2327                 if(sub_initializer->type == INITIALIZER_VALUE) {
2328                         create_initializer_value(&sub_initializer->value,
2329                                                  entity, &entry, len);
2330                 } else {
2331                         create_initializer_object(sub_initializer, element_type, entity,
2332                                                   &entry, len);
2333                 }
2334         }
2335
2336 #if 0
2337         /* TODO: initialize rest... */
2338         if(type->size_expression != NULL) {
2339                 size_t array_len = fold_constant(type->size_expression);
2340                 for( ; i < array_len; ++i) {
2341
2342                 }
2343         }
2344 #endif
2345 }
2346
2347 static void create_initializer_string(initializer_string_t *initializer,
2348                                       array_type_t *type, ir_entity *entity,
2349                                       compound_graph_path_entry_t *last_entry,
2350                                       int len)
2351 {
2352         type_t *element_type = type->element_type;
2353         element_type         = skip_typeref(element_type);
2354
2355         compound_graph_path_entry_t entry;
2356         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2357         entry.prev = last_entry;
2358         ++len;
2359
2360         ir_type    *irtype  = get_entity_type(entity);
2361         size_t      arr_len = get_array_type_size(type);
2362         const char *p       = initializer->string;
2363         size_t      i       = 0;
2364         for(i = 0; i < arr_len; ++i, ++p) {
2365                 entry.v.array_index = i;
2366
2367                 ir_node             *node = new_Const_long(mode_Bs, *p);
2368                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2369                 add_compound_ent_value_w_path(entity, node, path);
2370
2371                 if(*p == '\0')
2372                         break;
2373         }
2374 }
2375
2376 static void create_initializer_wide_string(
2377         const initializer_wide_string_t *const initializer, array_type_t *const type,
2378         ir_entity *const entity, compound_graph_path_entry_t *const last_entry,
2379         int len)
2380 {
2381         type_t *element_type = type->element_type;
2382         element_type         = skip_typeref(element_type);
2383
2384         compound_graph_path_entry_t entry;
2385         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2386         entry.prev = last_entry;
2387         ++len;
2388
2389         ir_type           *const irtype  = get_entity_type(entity);
2390         const size_t             arr_len = get_array_type_size(type);
2391         const wchar_rep_t *      p       = initializer->string.begin;
2392         const wchar_rep_t *const end     = p + initializer->string.size;
2393         for (size_t i = 0; i < arr_len && p != end; ++i, ++p) {
2394                 entry.v.array_index = i;
2395
2396                 ir_node             *node = new_Const_long(mode_int, *p);
2397                 compound_graph_path *path = create_compound_path(irtype, &entry, len);
2398                 add_compound_ent_value_w_path(entity, node, path);
2399         }
2400 }
2401
2402 static void create_initializer_object(initializer_t *initializer, type_t *type,
2403                 ir_entity *entity, compound_graph_path_entry_t *entry, int len)
2404 {
2405         if(is_type_array(type)) {
2406                 array_type_t *array_type = &type->array;
2407
2408                 switch (initializer->type) {
2409                         case INITIALIZER_STRING: {
2410                                 initializer_string_t *const string = &initializer->string;
2411                                 create_initializer_string(string, array_type, entity, entry, len);
2412                                 return;
2413                         }
2414
2415                         case INITIALIZER_WIDE_STRING: {
2416                                 initializer_wide_string_t *const string = &initializer->wide_string;
2417                                 create_initializer_wide_string(string, array_type, entity, entry, len);
2418                                 return;
2419                         }
2420
2421                         case INITIALIZER_LIST: {
2422                                 initializer_list_t *const list = &initializer->list;
2423                                 create_initializer_array(list, array_type, entity, entry, len);
2424                                 return;
2425                         }
2426
2427                         case INITIALIZER_VALUE:
2428                                 break;
2429                 }
2430                 panic("Unhandled initializer");
2431         } else {
2432                 assert(initializer->type == INITIALIZER_LIST);
2433                 initializer_list_t *list = &initializer->list;
2434
2435                 assert(is_type_compound(type));
2436                 compound_type_t *compound_type = &type->compound;
2437                 create_initializer_compound(list, compound_type, entity, entry, len);
2438         }
2439 }
2440
2441 static void create_initializer_local_variable_entity(declaration_t *declaration)
2442 {
2443         initializer_t *initializer = declaration->init.initializer;
2444         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
2445         ir_entity     *entity      = declaration->v.entity;
2446         ir_node       *memory      = get_store();
2447         ir_node       *nomem       = new_NoMem();
2448         ir_node       *frame       = get_irg_frame(current_ir_graph);
2449         ir_node       *addr        = new_d_simpleSel(dbgi, nomem, frame, entity);
2450
2451         if(initializer->type == INITIALIZER_VALUE) {
2452                 initializer_value_t *initializer_value = &initializer->value;
2453
2454                 ir_node *value = expression_to_firm(initializer_value->value);
2455                 type_t  *type  = skip_typeref(declaration->type);
2456                 assign_value(dbgi, addr, type, value);
2457                 return;
2458         }
2459
2460         /* create a "template" entity which is copied to the entity on the stack */
2461         ident     *const id          = unique_ident("initializer");
2462         ir_type   *const irtype      = get_ir_type(declaration->type);
2463         ir_type   *const global_type = get_glob_type();
2464         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
2465         set_entity_ld_ident(init_entity, id);
2466
2467         set_entity_variability(init_entity, variability_initialized);
2468         set_entity_visibility(init_entity, visibility_local);
2469         set_entity_allocation(init_entity, allocation_static);
2470
2471         ir_graph *const old_current_ir_graph = current_ir_graph;
2472         current_ir_graph = get_const_code_irg();
2473
2474         type_t *const type = skip_typeref(declaration->type);
2475         create_initializer_object(initializer, type, init_entity, NULL, 0);
2476
2477         assert(current_ir_graph == get_const_code_irg());
2478         current_ir_graph = old_current_ir_graph;
2479
2480         ir_node *const src_addr  = create_symconst(dbgi, init_entity);
2481         ir_node *const copyb     = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
2482
2483         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
2484         set_store(copyb_mem);
2485 }
2486
2487 static void create_initializer(declaration_t *declaration)
2488 {
2489         initializer_t *initializer = declaration->init.initializer;
2490         if(initializer == NULL)
2491                 return;
2492
2493         declaration_type_t declaration_type
2494                 = (declaration_type_t) declaration->declaration_type;
2495         if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY) {
2496                 create_initializer_local_variable_entity(declaration);
2497                 return;
2498         }
2499
2500         if(initializer->type == INITIALIZER_VALUE) {
2501                 initializer_value_t *initializer_value = &initializer->value;
2502
2503                 ir_node *value = expression_to_firm(initializer_value->value);
2504
2505                 if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
2506                         set_value(declaration->v.value_number, value);
2507                 } else {
2508                         assert(declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2509
2510                         ir_entity *entity = declaration->v.entity;
2511
2512                         set_entity_variability(entity, variability_initialized);
2513                         set_atomic_ent_value(entity, value);
2514                 }
2515         } else {
2516                 assert(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY
2517                                 || declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2518
2519                 ir_entity *entity = declaration->v.entity;
2520                 set_entity_variability(entity, variability_initialized);
2521
2522                 type_t *type = skip_typeref(declaration->type);
2523                 create_initializer_object(initializer, type, entity, NULL, 0);
2524         }
2525 }
2526
2527 static void create_local_variable(declaration_t *declaration)
2528 {
2529         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2530
2531         bool needs_entity = declaration->address_taken;
2532         type_t *type = skip_typeref(declaration->type);
2533
2534         if(is_type_array(type) || is_type_compound(type)) {
2535                 needs_entity = true;
2536         }
2537
2538         if(needs_entity) {
2539                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2540                 create_declaration_entity(declaration,
2541                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
2542                                           frame_type);
2543         } else {
2544                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2545                 declaration->v.value_number   = next_value_number_function;
2546                 ++next_value_number_function;
2547         }
2548
2549         create_initializer(declaration);
2550 }
2551
2552 static void create_local_static_variable(declaration_t *declaration)
2553 {
2554         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2555
2556         type_t    *const type        = skip_typeref(declaration->type);
2557         ir_type   *const global_type = get_glob_type();
2558         ident     *const id          = unique_ident(declaration->symbol->string);
2559         ir_type   *const irtype      = get_ir_type(type);
2560         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
2561         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
2562         set_entity_ld_ident(entity, id);
2563
2564         declaration->declaration_type = DECLARATION_TYPE_GLOBAL_VARIABLE;
2565         declaration->v.entity         = entity;
2566         set_entity_variability(entity, variability_uninitialized);
2567         set_entity_visibility(entity, visibility_local);
2568         set_entity_allocation(entity, allocation_static);
2569
2570         ir_graph *const old_current_ir_graph = current_ir_graph;
2571         current_ir_graph = get_const_code_irg();
2572
2573         create_initializer(declaration);
2574
2575         assert(current_ir_graph == get_const_code_irg());
2576         current_ir_graph = old_current_ir_graph;
2577 }
2578
2579
2580
2581 static void return_statement_to_firm(return_statement_t *statement)
2582 {
2583         if(get_cur_block() == NULL)
2584                 return;
2585
2586         ir_type *func_irtype = get_ir_type(current_function_decl->type);
2587
2588         dbg_info *dbgi  = get_dbg_info(&statement->statement.source_position);
2589
2590         ir_node *in[1];
2591         int      in_len;
2592         if(get_method_n_ress(func_irtype) > 0) {
2593                 ir_type *res_type = get_method_res_type(func_irtype, 0);
2594
2595                 if(statement->return_value != NULL) {
2596                         ir_node *node = expression_to_firm(statement->return_value);
2597                         node  = do_strict_conv(dbgi, node);
2598                         in[0] = node;
2599                 } else {
2600                         ir_mode *mode;
2601                         if(is_compound_type(res_type)) {
2602                                 mode = mode_P_data;
2603                         } else {
2604                                 mode = get_type_mode(res_type);
2605                         }
2606                         in[0] = new_Unknown(mode);
2607                 }
2608                 in_len = 1;
2609         } else {
2610                 /* build return_value for its side effects */
2611                 if(statement->return_value != NULL) {
2612                         expression_to_firm(statement->return_value);
2613                 }
2614                 in_len = 0;
2615         }
2616
2617         ir_node  *store = get_store();
2618         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
2619
2620         ir_node *end_block = get_irg_end_block(current_ir_graph);
2621         add_immBlock_pred(end_block, ret);
2622
2623         set_cur_block(NULL);
2624 }
2625
2626 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
2627 {
2628         if(get_cur_block() == NULL)
2629                 return NULL;
2630
2631         return expression_to_firm(statement->expression);
2632 }
2633
2634 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
2635 {
2636         ir_node     *result    = NULL;
2637         statement_t *statement = compound->statements;
2638         for( ; statement != NULL; statement = statement->base.next) {
2639                 //context2firm(&statement->context);
2640
2641                 if(statement->base.next == NULL
2642                                 && statement->type == STATEMENT_EXPRESSION) {
2643                         result = expression_statement_to_firm(
2644                                         (expression_statement_t*) statement);
2645                         break;
2646                 }
2647                 statement_to_firm(statement);
2648         }
2649
2650         return result;
2651 }
2652
2653 static void create_local_declaration(declaration_t *declaration)
2654 {
2655         type_t *type = skip_typeref(declaration->type);
2656
2657         switch ((storage_class_tag_t) declaration->storage_class) {
2658         case STORAGE_CLASS_STATIC:
2659                 create_local_static_variable(declaration);
2660                 return;
2661         case STORAGE_CLASS_ENUM_ENTRY:
2662                 panic("enum entry declaration in local block found");
2663         case STORAGE_CLASS_EXTERN:
2664                 panic("extern declaration in local block found");
2665         case STORAGE_CLASS_NONE:
2666         case STORAGE_CLASS_AUTO:
2667         case STORAGE_CLASS_REGISTER:
2668                 if(is_type_function(type)) {
2669                         panic("nested functions not supported yet");
2670                 } else {
2671                         create_local_variable(declaration);
2672                 }
2673                 return;
2674         case STORAGE_CLASS_TYPEDEF:
2675         case STORAGE_CLASS_THREAD:
2676         case STORAGE_CLASS_THREAD_EXTERN:
2677         case STORAGE_CLASS_THREAD_STATIC:
2678                 return;
2679         }
2680         panic("invalid storage class found");
2681 }
2682
2683 static void declaration_statement_to_firm(declaration_statement_t *statement)
2684 {
2685         declaration_t *declaration = statement->declarations_begin;
2686         declaration_t *end         = statement->declarations_end->next;
2687         for( ; declaration != end; declaration = declaration->next) {
2688                 create_local_variable(declaration);
2689         }
2690 }
2691
2692 static void if_statement_to_firm(if_statement_t *statement)
2693 {
2694         ir_node *cur_block = get_cur_block();
2695
2696         ir_node *fallthrough_block = new_immBlock();
2697
2698         /* the true (blocks) */
2699         ir_node *true_block;
2700         if (statement->true_statement != NULL) {
2701                 true_block = new_immBlock();
2702                 statement_to_firm(statement->true_statement);
2703                 if(get_cur_block() != NULL) {
2704                         ir_node *jmp = new_Jmp();
2705                         add_immBlock_pred(fallthrough_block, jmp);
2706                 }
2707         } else {
2708                 true_block = fallthrough_block;
2709         }
2710
2711         /* the false (blocks) */
2712         ir_node *false_block;
2713         if(statement->false_statement != NULL) {
2714                 false_block = new_immBlock();
2715
2716                 statement_to_firm(statement->false_statement);
2717                 if(get_cur_block() != NULL) {
2718                         ir_node *jmp = new_Jmp();
2719                         add_immBlock_pred(fallthrough_block, jmp);
2720                 }
2721         } else {
2722                 false_block = fallthrough_block;
2723         }
2724
2725         /* create the condition */
2726         if(cur_block != NULL) {
2727                 set_cur_block(cur_block);
2728                 create_condition_evaluation(statement->condition, true_block,
2729                                             false_block);
2730         }
2731
2732         mature_immBlock(true_block);
2733         if(false_block != fallthrough_block) {
2734                 mature_immBlock(false_block);
2735         }
2736         mature_immBlock(fallthrough_block);
2737
2738         set_cur_block(fallthrough_block);
2739 }
2740
2741 static void while_statement_to_firm(while_statement_t *statement)
2742 {
2743         ir_node *jmp = NULL;
2744         if(get_cur_block() != NULL) {
2745                 jmp = new_Jmp();
2746         }
2747
2748         /* create the header block */
2749         ir_node *header_block = new_immBlock();
2750         if(jmp != NULL) {
2751                 add_immBlock_pred(header_block, jmp);
2752         }
2753
2754         /* the false block */
2755         ir_node *false_block = new_immBlock();
2756
2757         /* the loop body */
2758         ir_node *body_block;
2759         if (statement->body != NULL) {
2760                 ir_node *old_continue_label = continue_label;
2761                 ir_node *old_break_label    = break_label;
2762                 continue_label              = header_block;
2763                 break_label                 = false_block;
2764
2765                 body_block = new_immBlock();
2766                 statement_to_firm(statement->body);
2767
2768                 assert(continue_label == header_block);
2769                 assert(break_label    == false_block);
2770                 continue_label = old_continue_label;
2771                 break_label    = old_break_label;
2772
2773                 if(get_cur_block() != NULL) {
2774                         jmp = new_Jmp();
2775                         add_immBlock_pred(header_block, jmp);
2776                 }
2777         } else {
2778                 body_block = header_block;
2779         }
2780
2781         /* create the condition */
2782         set_cur_block(header_block);
2783
2784         create_condition_evaluation(statement->condition, body_block, false_block);
2785         mature_immBlock(body_block);
2786         mature_immBlock(false_block);
2787         mature_immBlock(header_block);
2788
2789         set_cur_block(false_block);
2790 }
2791
2792 static void do_while_statement_to_firm(do_while_statement_t *statement)
2793 {
2794         ir_node *jmp = NULL;
2795         if(get_cur_block() != NULL) {
2796                 jmp = new_Jmp();
2797         }
2798
2799         /* create the header block */
2800         ir_node *header_block = new_immBlock();
2801
2802         /* the false block */
2803         ir_node *false_block = new_immBlock();
2804
2805         /* the loop body */
2806         ir_node *body_block = new_immBlock();
2807         if(jmp != NULL) {
2808                 add_immBlock_pred(body_block, jmp);
2809         }
2810
2811         if (statement->body != NULL) {
2812                 ir_node *old_continue_label = continue_label;
2813                 ir_node *old_break_label    = break_label;
2814                 continue_label              = header_block;
2815                 break_label                 = false_block;
2816
2817                 statement_to_firm(statement->body);
2818
2819                 assert(continue_label == header_block);
2820                 assert(break_label    == false_block);
2821                 continue_label = old_continue_label;
2822                 break_label    = old_break_label;
2823
2824                 if (get_cur_block() == NULL) {
2825                         mature_immBlock(header_block);
2826                         mature_immBlock(body_block);
2827                         mature_immBlock(false_block);
2828                         return;
2829                 }
2830         }
2831
2832         ir_node *body_jmp = new_Jmp();
2833         add_immBlock_pred(header_block, body_jmp);
2834         mature_immBlock(header_block);
2835
2836         /* create the condition */
2837         set_cur_block(header_block);
2838
2839         create_condition_evaluation(statement->condition, body_block, false_block);
2840         mature_immBlock(body_block);
2841         mature_immBlock(false_block);
2842         mature_immBlock(header_block);
2843
2844         set_cur_block(false_block);
2845 }
2846
2847 static void for_statement_to_firm(for_statement_t *statement)
2848 {
2849         ir_node *jmp = NULL;
2850         if (get_cur_block() != NULL) {
2851                 if(statement->initialisation != NULL) {
2852                         expression_to_firm(statement->initialisation);
2853                 }
2854
2855                 /* create declarations */
2856                 declaration_t *declaration = statement->context.declarations;
2857                 for( ; declaration != NULL; declaration = declaration->next) {
2858                         create_local_declaration(declaration);
2859                 }
2860
2861                 jmp = new_Jmp();
2862         }
2863
2864
2865         /* create the step block */
2866         ir_node *const step_block = new_immBlock();
2867         if (statement->step != NULL) {
2868                 expression_to_firm(statement->step);
2869         }
2870         ir_node *const step_jmp = new_Jmp();
2871
2872         /* create the header block */
2873         ir_node *const header_block = new_immBlock();
2874         if (jmp != NULL) {
2875                 add_immBlock_pred(header_block, jmp);
2876         }
2877         add_immBlock_pred(header_block, step_jmp);
2878
2879         /* the false block */
2880         ir_node *const false_block = new_immBlock();
2881
2882         /* the loop body */
2883         ir_node * body_block;
2884         if (statement->body != NULL) {
2885                 ir_node *const old_continue_label = continue_label;
2886                 ir_node *const old_break_label    = break_label;
2887                 continue_label = step_block;
2888                 break_label    = false_block;
2889
2890                 body_block = new_immBlock();
2891                 statement_to_firm(statement->body);
2892
2893                 assert(continue_label == step_block);
2894                 assert(break_label    == false_block);
2895                 continue_label = old_continue_label;
2896                 break_label    = old_break_label;
2897
2898                 if (get_cur_block() != NULL) {
2899                         jmp = new_Jmp();
2900                         add_immBlock_pred(step_block, jmp);
2901                 }
2902         } else {
2903                 body_block = step_block;
2904         }
2905
2906         /* create the condition */
2907         set_cur_block(header_block);
2908         if (statement->condition != NULL) {
2909                 create_condition_evaluation(statement->condition, body_block,
2910                                             false_block);
2911         } else {
2912                 keep_alive(header_block);
2913                 jmp = new_Jmp();
2914                 add_immBlock_pred(body_block, jmp);
2915         }
2916
2917         mature_immBlock(body_block);
2918         mature_immBlock(false_block);
2919         mature_immBlock(step_block);
2920         mature_immBlock(header_block);
2921         mature_immBlock(false_block);
2922
2923         set_cur_block(false_block);
2924 }
2925
2926 static void create_jump_statement(const statement_t *statement,
2927                                   ir_node *target_block)
2928 {
2929         if(get_cur_block() == NULL)
2930                 return;
2931
2932         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
2933         ir_node  *jump = new_d_Jmp(dbgi);
2934         add_immBlock_pred(target_block, jump);
2935
2936         set_cur_block(NULL);
2937 }
2938
2939 static void switch_statement_to_firm(const switch_statement_t *statement)
2940 {
2941         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2942
2943         ir_node *expression  = expression_to_firm(statement->expression);
2944         ir_node *cond        = new_d_Cond(dbgi, expression);
2945         ir_node *break_block = new_immBlock();
2946
2947         set_cur_block(NULL);
2948
2949         ir_node *const old_switch_cond       = current_switch_cond;
2950         ir_node *const old_break_label       = break_label;
2951         const bool     old_saw_default_label = saw_default_label;
2952         current_switch_cond                  = cond;
2953         break_label                          = break_block;
2954
2955         statement_to_firm(statement->body);
2956
2957         if(get_cur_block() != NULL) {
2958                 ir_node *jmp = new_Jmp();
2959                 add_immBlock_pred(break_block, jmp);
2960         }
2961
2962         if (!saw_default_label) {
2963                 set_cur_block(get_nodes_block(cond));
2964                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
2965                                                         MAGIC_DEFAULT_PN_NUMBER);
2966                 add_immBlock_pred(break_block, proj);
2967         }
2968
2969         assert(current_switch_cond == cond);
2970         assert(break_label         == break_block);
2971         current_switch_cond = old_switch_cond;
2972         break_label         = old_break_label;
2973         saw_default_label   = old_saw_default_label;
2974
2975         mature_immBlock(break_block);
2976         set_cur_block(break_block);
2977 }
2978
2979 static void case_label_to_firm(const case_label_statement_t *statement)
2980 {
2981         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2982
2983         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
2984
2985         /* let's create a node and hope firm constant folding creates a Const
2986          * node... */
2987         ir_node *proj;
2988         set_cur_block(get_nodes_block(current_switch_cond));
2989         if(statement->expression) {
2990                 long pn = fold_constant(statement->expression);
2991                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
2992                         /* oops someone detected our cheating... */
2993                         panic("magic default pn used");
2994                 }
2995                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
2996         } else {
2997                 saw_default_label = true;
2998                 proj = new_d_defaultProj(dbgi, current_switch_cond,
2999                                          MAGIC_DEFAULT_PN_NUMBER);
3000         }
3001
3002         ir_node *block = new_immBlock();
3003         if (fallthrough != NULL) {
3004                 add_immBlock_pred(block, fallthrough);
3005         }
3006         add_immBlock_pred(block, proj);
3007         mature_immBlock(block);
3008
3009         if(statement->label_statement != NULL) {
3010                 statement_to_firm(statement->label_statement);
3011         }
3012 }
3013
3014 static ir_node *get_label_block(declaration_t *label)
3015 {
3016         assert(label->namespc == NAMESPACE_LABEL);
3017
3018         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
3019                 return label->v.block;
3020         }
3021         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
3022
3023         ir_node *old_cur_block = get_cur_block();
3024         ir_node *block         = new_immBlock();
3025         set_cur_block(old_cur_block);
3026
3027         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
3028         label->v.block          = block;
3029
3030         ARR_APP1(ir_node *, imature_blocks, block);
3031
3032         return block;
3033 }
3034
3035 static void label_to_firm(const label_statement_t *statement)
3036 {
3037         ir_node *block = get_label_block(statement->label);
3038
3039         if(get_cur_block() != NULL) {
3040                 ir_node *jmp = new_Jmp();
3041                 add_immBlock_pred(block, jmp);
3042         }
3043
3044         set_cur_block(block);
3045         keep_alive(block);
3046
3047         if(statement->label_statement != NULL) {
3048                 statement_to_firm(statement->label_statement);
3049         }
3050 }
3051
3052 static void goto_to_firm(const goto_statement_t *statement)
3053 {
3054         if(get_cur_block() == NULL)
3055                 return;
3056
3057         ir_node *block = get_label_block(statement->label);
3058         ir_node *jmp   = new_Jmp();
3059         add_immBlock_pred(block, jmp);
3060
3061         set_cur_block(NULL);
3062 }
3063
3064 typedef enum modifier_t {
3065         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
3066         ASM_MODIFIER_READ_WRITE   = 1 << 1,
3067         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
3068         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
3069 } modifier_t;
3070
3071 #if 0
3072 static void asm_statement_to_firm(const asm_statement_t *statement)
3073 {
3074         bool needs_memory = false;
3075
3076         size_t         n_clobbers = 0;
3077         asm_clobber_t *clobber    = statement->clobbers;
3078         for( ; clobber != NULL; clobber = clobber->next) {
3079                 if(strcmp(clobber->clobber, "memory") == 0) {
3080                         needs_memory = true;
3081                         continue;
3082                 }
3083
3084                 ident *id = new_id_from_str(clobber->clobber);
3085                 obstack_ptr_grow(&asm_obst, id);
3086                 ++n_clobbers;
3087         }
3088         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
3089         ident **clobbers = NULL;
3090         if(n_clobbers > 0) {
3091                 clobbers = obstack_finish(&asm_obst);
3092         }
3093
3094         /* find and count input and output constraints */
3095         asm_constraint_t *constraint = statement->inputs;
3096         for( ; constraint != NULL; constraint = constraint->next) {
3097                 int  modifiers      = 0;
3098                 bool supports_memop = false;
3099                 for(const char *c = constraint->constraints; *c != 0; ++c) {
3100                         /* TODO: improve error messages */
3101                         switch(*c) {
3102                         case '?':
3103                         case '!':
3104                                 panic("multiple alternative assembler constraints not "
3105                                       "supported");
3106                         case 'm':
3107                         case 'o':
3108                         case 'V':
3109                         case '<':
3110                         case '>':
3111                         case 'X':
3112                                 supports_memop = true;
3113                                 obstack_1grow(&asm_obst, *c);
3114                                 break;
3115                         case '=':
3116                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
3117                                         panic("inconsistent register constraints");
3118                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
3119                                 break;
3120                         case '+':
3121                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
3122                                         panic("inconsistent register constraints");
3123                                 modifiers |= ASM_MODIFIER_READ_WRITE;
3124                                 break;
3125                         case '&':
3126                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
3127                                 panic("early clobber assembler constraint not supported yet");
3128                                 break;
3129                         case '%':
3130                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
3131                                 panic("commutative assembler constraint not supported yet");
3132                                 break;
3133                         case '#':
3134                                 /* skip register preferences stuff... */
3135                                 while(*c != 0 && *c != ',')
3136                                         ++c;
3137                                 break;
3138                         case '*':
3139                                 /* skip register preferences stuff... */
3140                                 ++c;
3141                                 break;
3142                         default:
3143                                 obstack_1grow(&asm_obst, *c);
3144                                 break;
3145                         }
3146                 }
3147                 obstack_1grow(&asm_obst, '\0');
3148                 const char *constraint_string = obstack_finish(&asm_obst);
3149
3150                 needs_memory |= supports_memop;
3151                 if(supports_memop) {
3152
3153                 }
3154         }
3155
3156 }
3157 #endif
3158
3159 static void statement_to_firm(statement_t *statement)
3160 {
3161         switch(statement->type) {
3162         case STATEMENT_INVALID:
3163                 panic("invalid statement found");
3164         case STATEMENT_COMPOUND:
3165                 compound_statement_to_firm(&statement->compound);
3166                 return;
3167         case STATEMENT_RETURN:
3168                 return_statement_to_firm(&statement->returns);
3169                 return;
3170         case STATEMENT_EXPRESSION:
3171                 expression_statement_to_firm(&statement->expression);
3172                 return;
3173         case STATEMENT_IF:
3174                 if_statement_to_firm(&statement->ifs);
3175                 return;
3176         case STATEMENT_WHILE:
3177                 while_statement_to_firm(&statement->whiles);
3178                 return;
3179         case STATEMENT_DO_WHILE:
3180                 do_while_statement_to_firm(&statement->do_while);
3181                 return;
3182         case STATEMENT_DECLARATION:
3183                 declaration_statement_to_firm(&statement->declaration);
3184                 return;
3185         case STATEMENT_BREAK:
3186                 create_jump_statement(statement, break_label);
3187                 return;
3188         case STATEMENT_CONTINUE:
3189                 create_jump_statement(statement, continue_label);
3190                 return;
3191         case STATEMENT_SWITCH:
3192                 switch_statement_to_firm(&statement->switchs);
3193                 return;
3194         case STATEMENT_CASE_LABEL:
3195                 case_label_to_firm(&statement->case_label);
3196                 return;
3197         case STATEMENT_FOR:
3198                 for_statement_to_firm(&statement->fors);
3199                 return;
3200         case STATEMENT_LABEL:
3201                 label_to_firm(&statement->label);
3202                 return;
3203         case STATEMENT_GOTO:
3204                 goto_to_firm(&statement->gotos);
3205                 return;
3206         case STATEMENT_ASM:
3207                 //asm_statement_to_firm(&statement->asms);
3208                 //return;
3209                 break;
3210         }
3211         panic("Statement not implemented\n");
3212 }
3213
3214 static int count_decls_in_expression(const expression_t *expression);
3215
3216 static int count_local_declarations(const declaration_t *      decl,
3217                                     const declaration_t *const end)
3218 {
3219         int count = 0;
3220         for (; decl != end; decl = decl->next) {
3221                 const type_t *type = skip_typeref(decl->type);
3222                 switch (type->type) {
3223                         case TYPE_ATOMIC:
3224                         case TYPE_ENUM:
3225                         case TYPE_POINTER:
3226                                 if (!decl->address_taken)
3227                                         ++count;
3228                                 break;
3229
3230                         default: break;
3231                 }
3232                 const initializer_t *initializer = decl->init.initializer;
3233                 /* FIXME: should walk initializer hierarchies... */
3234                 if(initializer != NULL && initializer->type == INITIALIZER_VALUE) {
3235                         count += count_decls_in_expression(initializer->value.value);
3236                 }
3237         }
3238         return count;
3239 }
3240
3241 static int count_decls_in_expression(const expression_t *expression) {
3242         if(expression == NULL)
3243                 return 0;
3244
3245         switch(expression->base.type) {
3246         case EXPR_STATEMENT:
3247                 return count_decls_in_stmts(expression->statement.statement);
3248         EXPR_BINARY_CASES
3249                 return count_decls_in_expression(expression->binary.left)
3250                         + count_decls_in_expression(expression->binary.right);
3251         EXPR_UNARY_CASES
3252                 return count_decls_in_expression(expression->unary.value);
3253
3254         default:
3255                 break;
3256         }
3257
3258         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
3259          * (or implement all the missing expressions here/implement a walker)
3260          */
3261
3262         return 0;
3263 }
3264
3265 static int count_decls_in_stmts(const statement_t *stmt)
3266 {
3267         int count = 0;
3268         for (; stmt != NULL; stmt = stmt->base.next) {
3269                 switch (stmt->type) {
3270                         case STATEMENT_DECLARATION: {
3271                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
3272                                 count += count_local_declarations(decl_stmt->declarations_begin,
3273                                                                   decl_stmt->declarations_end->next);
3274                                 break;
3275                         }
3276
3277                         case STATEMENT_COMPOUND: {
3278                                 const compound_statement_t *const comp =
3279                                         (const compound_statement_t*)stmt;
3280                                 count += count_decls_in_stmts(comp->statements);
3281                                 break;
3282                         }
3283
3284                         case STATEMENT_IF: {
3285                                 const if_statement_t *const if_stmt = &stmt->ifs;
3286                                 count += count_decls_in_expression(if_stmt->condition);
3287                                 count += count_decls_in_stmts(if_stmt->true_statement);
3288                                 count += count_decls_in_stmts(if_stmt->false_statement);
3289                                 break;
3290                         }
3291
3292                         case STATEMENT_SWITCH: {
3293                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
3294                                 count += count_decls_in_expression(switch_stmt->expression);
3295                                 count += count_decls_in_stmts(switch_stmt->body);
3296                                 break;
3297                         }
3298
3299                         case STATEMENT_LABEL: {
3300                                 const label_statement_t *const label_stmt = &stmt->label;
3301                                 count += count_decls_in_stmts(label_stmt->label_statement);
3302                                 break;
3303                         }
3304
3305                         case STATEMENT_WHILE: {
3306                                 const while_statement_t *const while_stmt = &stmt->whiles;
3307                                 count += count_decls_in_expression(while_stmt->condition);
3308                                 count += count_decls_in_stmts(while_stmt->body);
3309                                 break;
3310                         }
3311
3312                         case STATEMENT_DO_WHILE: {
3313                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
3314                                 count += count_decls_in_expression(do_while_stmt->condition);
3315                                 count += count_decls_in_stmts(do_while_stmt->body);
3316                                 break;
3317                         }
3318
3319                         case STATEMENT_FOR: {
3320                                 const for_statement_t *const for_stmt = &stmt->fors;
3321                                 count += count_local_declarations(for_stmt->context.declarations, NULL);
3322                                 count += count_decls_in_expression(for_stmt->initialisation);
3323                                 count += count_decls_in_expression(for_stmt->condition);
3324                                 count += count_decls_in_expression(for_stmt->step);
3325                                 count += count_decls_in_stmts(for_stmt->body);
3326                                 break;
3327                         }
3328
3329                         case STATEMENT_CASE_LABEL: {
3330                                 const case_label_statement_t *label = &stmt->case_label;
3331                                 count += count_decls_in_expression(label->expression);
3332                                 count += count_decls_in_stmts(label->label_statement);
3333                                 break;
3334                         }
3335
3336                         case STATEMENT_ASM:
3337                         case STATEMENT_BREAK:
3338                         case STATEMENT_CONTINUE:
3339                                 break;
3340
3341                         case STATEMENT_EXPRESSION: {
3342                                 const expression_statement_t *expr_stmt = &stmt->expression;
3343                                 count += count_decls_in_expression(expr_stmt->expression);
3344                                 break;
3345                         }
3346
3347                         case STATEMENT_GOTO:
3348                         case STATEMENT_INVALID:
3349                                 break;
3350
3351                         case STATEMENT_RETURN: {
3352                                 const return_statement_t *ret_stmt = &stmt->returns;
3353                                 count += count_decls_in_expression(ret_stmt->return_value);
3354                                 break;
3355                         }
3356                 }
3357         }
3358         return count;
3359 }
3360
3361 static int get_function_n_local_vars(declaration_t *declaration)
3362 {
3363         int count = 0;
3364
3365         /* count parameters */
3366         count += count_local_declarations(declaration->context.declarations, NULL);
3367
3368         /* count local variables declared in body */
3369         count += count_decls_in_stmts(declaration->init.statement);
3370
3371         return count;
3372 }
3373
3374 static void initialize_function_parameters(declaration_t *declaration)
3375 {
3376         ir_graph        *irg             = current_ir_graph;
3377         ir_node         *args            = get_irg_args(irg);
3378         ir_node         *start_block     = get_irg_start_block(irg);
3379         ir_type         *function_irtype = get_ir_type(declaration->type);
3380
3381         int            n         = 0;
3382         declaration_t *parameter = declaration->context.declarations;
3383         for( ; parameter != NULL; parameter = parameter->next, ++n) {
3384                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
3385                 type_t *type = skip_typeref(parameter->type);
3386
3387                 bool needs_entity = parameter->address_taken;
3388                 assert(!is_type_array(type));
3389                 if(is_type_compound(type)) {
3390                         needs_entity = true;
3391                 }
3392
3393                 if(needs_entity) {
3394                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
3395                         ident     *id     = new_id_from_str(parameter->symbol->string);
3396                         set_entity_ident(entity, id);
3397
3398                         parameter->declaration_type
3399                                 = DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY;
3400                         parameter->v.entity = entity;
3401                         continue;
3402                 }
3403
3404                 ir_mode *mode = get_ir_mode(parameter->type);
3405                 long     pn   = n;
3406                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
3407
3408                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
3409                 parameter->v.value_number   = next_value_number_function;
3410                 ++next_value_number_function;
3411
3412                 set_value(parameter->v.value_number, proj);
3413         }
3414 }
3415
3416 /**
3417  * Handle additional decl modifiers for IR-graphs
3418  *
3419  * @param irg            the IR-graph
3420  * @param dec_modifiers  additional modifiers
3421  */
3422 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
3423 {
3424         if (decl_modifiers & DM_NORETURN) {
3425                 /* TRUE if the declaration includes the Microsoft
3426                    __declspec(noreturn) specifier. */
3427                 set_irg_additional_property(irg, mtp_property_noreturn);
3428         }
3429         if (decl_modifiers & DM_NOTHROW) {
3430                 /* TRUE if the declaration includes the Microsoft
3431                    __declspec(nothrow) specifier. */
3432                 set_irg_additional_property(irg, mtp_property_nothrow);
3433         }
3434         if (decl_modifiers & DM_NAKED) {
3435                 /* TRUE if the declaration includes the Microsoft
3436                    __declspec(naked) specifier. */
3437                 set_irg_additional_property(irg, mtp_property_naked);
3438         }
3439         if (decl_modifiers & DM_FORCEINLINE) {
3440                 /* TRUE if the declaration includes the
3441                    Microsoft __forceinline specifier. */
3442                 set_irg_inline_property(irg, irg_inline_forced);
3443         }
3444         if (decl_modifiers & DM_NOINLINE) {
3445                 /* TRUE if the declaration includes the Microsoft
3446                    __declspec(noinline) specifier. */
3447                 set_irg_inline_property(irg, irg_inline_forbidden);
3448         }
3449 }
3450
3451 static void create_function(declaration_t *declaration)
3452 {
3453         ir_entity *function_entity = get_function_entity(declaration);
3454
3455         if(declaration->init.statement == NULL)
3456                 return;
3457
3458         current_function_decl = declaration;
3459         current_function_name = NULL;
3460
3461         assert(imature_blocks == NULL);
3462         imature_blocks = NEW_ARR_F(ir_node*, 0);
3463
3464         int       n_local_vars = get_function_n_local_vars(declaration);
3465         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
3466         ir_node  *first_block  = get_cur_block();
3467
3468         /* set inline flags */
3469         if (declaration->is_inline)
3470         set_irg_inline_property(irg, irg_inline_recomended);
3471     handle_decl_modifier_irg(irg, declaration->decl_modifiers);
3472
3473         next_value_number_function = 0;
3474         initialize_function_parameters(declaration);
3475
3476         statement_to_firm(declaration->init.statement);
3477
3478         ir_node *end_block = get_irg_end_block(irg);
3479
3480         /* do we have a return statement yet? */
3481         if(get_cur_block() != NULL) {
3482                 type_t *type = skip_typeref(declaration->type);
3483                 assert(is_type_function(type));
3484                 const function_type_t *func_type   = &type->function;
3485                 const type_t          *return_type
3486                         = skip_typeref(func_type->return_type);
3487
3488                 ir_node *ret;
3489                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
3490                         ret = new_Return(get_store(), 0, NULL);
3491                 } else {
3492                         ir_mode *mode;
3493                         if(is_type_scalar(return_type)) {
3494                                 mode = get_ir_mode(func_type->return_type);
3495                         } else {
3496                                 mode = mode_P_data;
3497                         }
3498
3499                         ir_node *in[1];
3500                         /* §5.1.2.2.3 main implicitly returns 0 */
3501                         if (strcmp(declaration->symbol->string, "main") == 0) {
3502                                 in[0] = new_Const(mode, get_mode_null(mode));
3503                         } else {
3504                                 in[0] = new_Unknown(mode);
3505                         }
3506                         ret = new_Return(get_store(), 1, in);
3507                 }
3508                 add_immBlock_pred(end_block, ret);
3509         }
3510
3511         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
3512                 mature_immBlock(imature_blocks[i]);
3513         }
3514         DEL_ARR_F(imature_blocks);
3515         imature_blocks = NULL;
3516
3517         mature_immBlock(first_block);
3518         mature_immBlock(end_block);
3519
3520         irg_finalize_cons(irg);
3521
3522         /* finalize the frame type */
3523         ir_type *frame_type = get_irg_frame_type(irg);
3524         int      n          = get_compound_n_members(frame_type);
3525         int      align_all  = 4;
3526         int      offset     = 0;
3527         for(int i = 0; i < n; ++i) {
3528                 ir_entity *entity      = get_compound_member(frame_type, i);
3529                 ir_type   *entity_type = get_entity_type(entity);
3530
3531                 int align = get_type_alignment_bytes(entity_type);
3532                 if(align > align_all)
3533                         align_all = align;
3534                 int misalign = 0;
3535                 if(align > 0) {
3536                         misalign  = offset % align;
3537                         if(misalign > 0) {
3538                                 offset += align - misalign;
3539                         }
3540                 }
3541
3542                 set_entity_offset(entity, offset);
3543                 offset += get_type_size_bytes(entity_type);
3544         }
3545         set_type_size_bytes(frame_type, offset);
3546         set_type_alignment_bytes(frame_type, align_all);
3547         set_type_state(frame_type, layout_fixed);
3548
3549         irg_vrfy(irg);
3550 }
3551
3552 static void create_global_variable(declaration_t *declaration)
3553 {
3554         ir_visibility  vis;
3555         ir_type       *var_type;
3556         switch ((storage_class_tag_t)declaration->storage_class) {
3557                 case STORAGE_CLASS_STATIC:
3558                         vis = visibility_local;
3559                         goto global_var;
3560
3561                 case STORAGE_CLASS_EXTERN:
3562                         vis = visibility_external_allocated;
3563                         goto global_var;
3564
3565                 case STORAGE_CLASS_NONE:
3566                         vis = visibility_external_visible;
3567                         goto global_var;
3568
3569                 case STORAGE_CLASS_THREAD:
3570                         vis = visibility_external_visible;
3571                         goto tls_var;
3572
3573                 case STORAGE_CLASS_THREAD_EXTERN:
3574                         vis = visibility_external_allocated;
3575                         goto tls_var;
3576
3577                 case STORAGE_CLASS_THREAD_STATIC:
3578                         vis = visibility_local;
3579                         goto tls_var;
3580
3581 tls_var:
3582                         var_type = get_tls_type();
3583                         goto create_var;
3584
3585 global_var:
3586                         var_type = get_glob_type();
3587                         goto create_var;
3588
3589 create_var:
3590                         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
3591                                                   var_type);
3592                         set_entity_visibility(declaration->v.entity, vis);
3593
3594                         current_ir_graph = get_const_code_irg();
3595                         create_initializer(declaration);
3596                         return;
3597
3598                 case STORAGE_CLASS_TYPEDEF:
3599                 case STORAGE_CLASS_AUTO:
3600                 case STORAGE_CLASS_REGISTER:
3601                 case STORAGE_CLASS_ENUM_ENTRY:
3602                         break;
3603         }
3604         panic("Invalid storage class for global variable");
3605 }
3606
3607 static void context_to_firm(context_t *context)
3608 {
3609         /* first pass: create declarations */
3610         declaration_t *declaration = context->declarations;
3611         for( ; declaration != NULL; declaration = declaration->next) {
3612                 if(declaration->namespc != NAMESPACE_NORMAL)
3613                         continue;
3614                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3615                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3616                         continue;
3617                 if(declaration->symbol == NULL)
3618                         continue;
3619
3620                 type_t *type = skip_typeref(declaration->type);
3621                 if(is_type_function(type)) {
3622                         get_function_entity(declaration);
3623                 } else {
3624                         create_global_variable(declaration);
3625                 }
3626         }
3627
3628         /* second pass: create code */
3629         declaration = context->declarations;
3630         for( ; declaration != NULL; declaration = declaration->next) {
3631                 if(declaration->namespc != NAMESPACE_NORMAL)
3632                         continue;
3633                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
3634                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
3635                         continue;
3636                 if(declaration->symbol == NULL)
3637                         continue;
3638
3639                 type_t *type = declaration->type;
3640                 if(type->type != TYPE_FUNCTION)
3641                         continue;
3642
3643                 create_function(declaration);
3644         }
3645 }
3646
3647 void init_ast2firm(void)
3648 {
3649         obstack_init(&asm_obst);
3650         init_atomic_modes();
3651
3652         /* create idents for all known runtime functions */
3653         for (int i = 0; i < sizeof(rts_data)/sizeof(rts_data[0]); ++i) {
3654                 predef_idents[rts_data[i].id] = new_id_from_str(rts_data[i].name);
3655         }
3656 }
3657
3658 void exit_ast2firm(void)
3659 {
3660         obstack_free(&asm_obst, NULL);
3661 }
3662
3663 void translation_unit_to_firm(translation_unit_t *unit)
3664 {
3665         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
3666         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
3667         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
3668
3669         ir_type_int        = get_ir_type(type_int);
3670         ir_type_const_char = get_ir_type(type_const_char);
3671         ir_type_wchar_t    = get_ir_type(type_wchar_t);
3672         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
3673                                                        type in firm */
3674
3675         type_void->base.firm_type = ir_type_void;
3676
3677         /* just to be sure */
3678         continue_label      = NULL;
3679         break_label         = NULL;
3680         current_switch_cond = NULL;
3681
3682         context_to_firm(&unit->context);
3683 }