nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25 #include <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "symbol_t.h"
  36 #include "token_t.h"
  37 #include "type_t.h"
  38 #include "ast_t.h"
  39 #include "entity_t.h"
  40 #include "parser.h"
  41 #include "diagnostic.h"
  42 #include "lang_features.h"
  43 #include "types.h"
  44 #include "type_hash.h"
  45 #include "mangle.h"
  46 #include "walk_statements.h"
  47 #include "warning.h"
  48 #include "entitymap_t.h"
  49 #include "driver/firm_opt.h"
  50 #include "driver/firm_cmdline.h"
  51
  52 static ir_type *ir_type_const_char;
  53 static ir_type *ir_type_wchar_t;
  54 static ir_type *ir_type_void;
  55 static ir_type *ir_type_int;
  56
  57 /* architecture specific floating point arithmetic mode (if any) */
  58 static ir_mode *mode_float_arithmetic;
  59
  60 static int        next_value_number_function;
  61 static ir_node   *continue_label;
  62 static ir_node   *break_label;
  63 static ir_node   *current_switch_cond;
  64 static bool       saw_default_label;
  65 static label_t  **all_labels;
  66 static entity_t **inner_functions;
  67 static ir_node   *ijmp_list;
  68 static bool       constant_folding;
  69
  70 extern bool       have_const_functions;
  71
  72 static const entity_t     *current_function_entity;
  73 static ir_node            *current_function_name;
  74 static ir_node            *current_funcsig;
  75 static switch_statement_t *current_switch;
  76 static ir_graph           *current_function;
  77 static translation_unit_t *current_translation_unit;
  78
  79 static entitymap_t  entitymap;
  80
  81 static struct obstack asm_obst;
  82
  83 typedef enum declaration_kind_t {
  84         DECLARATION_KIND_UNKNOWN,
  85         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  86         DECLARATION_KIND_GLOBAL_VARIABLE,
  87         DECLARATION_KIND_LOCAL_VARIABLE,
  88         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  89         DECLARATION_KIND_PARAMETER,
  90         DECLARATION_KIND_PARAMETER_ENTITY,
  91         DECLARATION_KIND_FUNCTION,
  92         DECLARATION_KIND_COMPOUND_MEMBER,
  93         DECLARATION_KIND_INNER_FUNCTION
  94 } declaration_kind_t;
  95
  96 static ir_mode *get_ir_mode_storage(type_t *type);
  97 /*
  98  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
  99  * int that it returns bigger modes for floating point on some platforms
 100  * (x87 internally does arithemtic with 80bits)
 101  */
 102 static ir_mode *get_ir_mode_arithmetic(type_t *type);
 103
 104 static ir_type *get_ir_type_incomplete(type_t *type);
 105
 106 static void enqueue_inner_function(entity_t *entity)
 107 {
 108         ARR_APP1(entity_t*, inner_functions, entity);
 109 }
 110
 111 static entity_t *next_inner_function(void)
 112 {
 113         int len = ARR_LEN(inner_functions);
 114         if (len == 0)
 115                 return NULL;
 116
 117         entity_t *entity = inner_functions[len-1];
 118         ARR_SHRINKLEN(inner_functions, len-1);
 119
 120         return entity;
 121 }
 122
 123 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 124 {
 125         const entity_t *entity = get_irg_loc_description(irg, pos);
 126
 127         if (entity != NULL) {
 128                 warningf(&entity->base.source_position,
 129                          "%s '%#T' might be used uninitialized",
 130                          get_entity_kind_name(entity->kind),
 131                          entity->declaration.type, entity->base.symbol);
 132         }
 133         return new_r_Unknown(irg, mode);
 134 }
 135
 136 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 137 {
 138         const source_position_t *pos = (const source_position_t*) dbg;
 139         if (pos == NULL)
 140                 return 0;
 141         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 142                                    pos->linenr);
 143 }
 144
 145 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 146 {
 147         const source_position_t *pos = (const source_position_t*) dbg;
 148         if (pos == NULL)
 149                 return NULL;
 150         if (line != NULL)
 151                 *line = pos->linenr;
 152         return pos->input_name;
 153 }
 154
 155 static dbg_info *get_dbg_info(const source_position_t *pos)
 156 {
 157         return (dbg_info*) pos;
 158 }
 159
 160 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 161
 162 static ir_mode *mode_int, *mode_uint;
 163
 164 static ir_node *_expression_to_firm(const expression_t *expression);
 165 static ir_node *expression_to_firm(const expression_t *expression);
 166 static void create_local_declaration(entity_t *entity);
 167
 168 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 169 {
 170         unsigned flags = get_atomic_type_flags(kind);
 171         unsigned size  = get_atomic_type_size(kind);
 172         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 173                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 174                 char            name[64];
 175                 ir_mode_sort    sort;
 176                 unsigned        bit_size     = size * 8;
 177                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 178                 unsigned        modulo_shift;
 179                 ir_mode_arithmetic arithmetic;
 180
 181                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 182                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 183                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 184                                  bit_size);
 185                         sort         = irms_int_number;
 186                         arithmetic   = irma_twos_complement;
 187                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 188                 } else {
 189                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 190                         snprintf(name, sizeof(name), "F%u", bit_size);
 191                         sort         = irms_float_number;
 192                         arithmetic   = irma_ieee754;
 193                         modulo_shift = 0;
 194                 }
 195                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 196                                    modulo_shift);
 197         }
 198
 199         return NULL;
 200 }
 201
 202 /**
 203  * Initialises the atomic modes depending on the machine size.
 204  */
 205 static void init_atomic_modes(void)
 206 {
 207         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 208                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 209         }
 210         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 211         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 212
 213         /* there's no real void type in firm */
 214         atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
 215
 216         /* initialize pointer modes */
 217         char            name[64];
 218         ir_mode_sort    sort         = irms_reference;
 219         unsigned        bit_size     = machine_size;
 220         bool            is_signed    = 0;
 221         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 222         unsigned        modulo_shift
 223                 = bit_size < machine_size ? machine_size : bit_size;
 224
 225         snprintf(name, sizeof(name), "p%u", machine_size);
 226         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 227                                         modulo_shift);
 228
 229         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 230         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 231
 232         /* Hmm, pointers should be machine size */
 233         set_modeP_data(ptr_mode);
 234         set_modeP_code(ptr_mode);
 235 }
 236
 237 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 238 {
 239         assert(kind <= ATOMIC_TYPE_LAST);
 240         return atomic_modes[kind];
 241 }
 242
 243 static unsigned get_compound_type_size(compound_type_t *type)
 244 {
 245         ir_type *irtype = get_ir_type((type_t*) type);
 246         return get_type_size_bytes(irtype);
 247 }
 248
 249 static unsigned get_array_type_size(array_type_t *type)
 250 {
 251         assert(!type->is_vla);
 252         ir_type *irtype = get_ir_type((type_t*) type);
 253         return get_type_size_bytes(irtype);
 254 }
 255
 256 static unsigned get_type_size_const(type_t *type)
 257 {
 258         switch(type->kind) {
 259         case TYPE_ERROR:
 260                 panic("error type occurred");
 261         case TYPE_ATOMIC:
 262                 return get_atomic_type_size(type->atomic.akind);
 263         case TYPE_COMPLEX:
 264                 return 2 * get_atomic_type_size(type->complex.akind);
 265         case TYPE_IMAGINARY:
 266                 return get_atomic_type_size(type->imaginary.akind);
 267         case TYPE_ENUM:
 268                 return get_mode_size_bytes(mode_int);
 269         case TYPE_COMPOUND_UNION:
 270         case TYPE_COMPOUND_STRUCT:
 271                 return get_compound_type_size(&type->compound);
 272         case TYPE_FUNCTION:
 273                 /* just a pointer to the function */
 274                 return get_mode_size_bytes(mode_P_code);
 275         case TYPE_POINTER:
 276         case TYPE_REFERENCE:
 277                 return get_mode_size_bytes(mode_P_data);
 278         case TYPE_ARRAY:
 279                 return get_array_type_size(&type->array);
 280         case TYPE_BUILTIN:
 281                 return get_type_size_const(type->builtin.real_type);
 282         case TYPE_BITFIELD:
 283                 panic("type size of bitfield request");
 284         case TYPE_TYPEDEF:
 285         case TYPE_TYPEOF:
 286         case TYPE_INVALID:
 287                 break;
 288         }
 289         panic("Trying to determine size of invalid type");
 290 }
 291
 292 static ir_node *get_vla_size(array_type_t *const type)
 293 {
 294         ir_node *size_node = type->size_node;
 295         if (size_node == NULL) {
 296                 size_node = expression_to_firm(type->size_expression);
 297                 type->size_node = size_node;
 298         }
 299         return size_node;
 300 }
 301
 302 static ir_node *get_type_size(type_t *type)
 303 {
 304         type = skip_typeref(type);
 305
 306         if (is_type_array(type) && type->array.is_vla) {
 307                 ir_node *size_node = get_vla_size(&type->array);
 308                 ir_node *elem_size = get_type_size(type->array.element_type);
 309                 ir_mode *mode      = get_irn_mode(size_node);
 310                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 311                 return real_size;
 312         }
 313
 314         ir_mode *mode = get_ir_mode_storage(type_size_t);
 315         symconst_symbol sym;
 316         sym.type_p = get_ir_type(type);
 317         return new_SymConst(mode, sym, symconst_type_size);
 318 }
 319
 320 static unsigned count_parameters(const function_type_t *function_type)
 321 {
 322         unsigned count = 0;
 323
 324         function_parameter_t *parameter = function_type->parameters;
 325         for ( ; parameter != NULL; parameter = parameter->next) {
 326                 ++count;
 327         }
 328
 329         return count;
 330 }
 331
 332 static type_t *get_aligned_type(type_t *type, int alignment)
 333 {
 334         if (alignment == 0)
 335                 return type;
 336
 337         type = skip_typeref(type);
 338         if (alignment > type->base.alignment) {
 339                 type_t *copy = duplicate_type(type);
 340                 copy->base.alignment = alignment;
 341
 342                 type = typehash_insert(copy);
 343                 if (type != copy) {
 344                         obstack_free(type_obst, copy);
 345                 }
 346         }
 347         return type;
 348 }
 349
 350 /**
 351  * Creates a Firm type for an atomic type
 352  */
 353 static ir_type *create_atomic_type(const atomic_type_t *type)
 354 {
 355         atomic_type_kind_t  kind   = type->akind;
 356         ir_mode            *mode   = atomic_modes[kind];
 357         ident              *id     = get_mode_ident(mode);
 358         ir_type            *irtype = new_type_primitive(id, mode);
 359
 360         set_type_alignment_bytes(irtype, type->base.alignment);
 361
 362         return irtype;
 363 }
 364
 365 /**
 366  * Creates a Firm type for a complex type
 367  */
 368 static ir_type *create_complex_type(const complex_type_t *type)
 369 {
 370         atomic_type_kind_t  kind = type->akind;
 371         ir_mode            *mode = atomic_modes[kind];
 372         ident              *id   = get_mode_ident(mode);
 373
 374         (void) id;
 375
 376         /* FIXME: finish the array */
 377         return NULL;
 378 }
 379
 380 /**
 381  * Creates a Firm type for an imaginary type
 382  */
 383 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 384 {
 385         atomic_type_kind_t  kind      = type->akind;
 386         ir_mode            *mode      = atomic_modes[kind];
 387         ident              *id        = get_mode_ident(mode);
 388         ir_type            *irtype    = new_type_primitive(id, mode);
 389
 390         set_type_alignment_bytes(irtype, type->base.alignment);
 391
 392         return irtype;
 393 }
 394
 395 /**
 396  * return type of a parameter (and take transparent union gnu extension into
 397  * account)
 398  */
 399 static type_t *get_parameter_type(type_t *type)
 400 {
 401         type = skip_typeref(type);
 402         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 403                 compound_t *compound = type->compound.compound;
 404                 type                 = compound->members.entities->declaration.type;
 405         }
 406
 407         return type;
 408 }
 409
 410 static ir_type *create_method_type(const function_type_t *function_type)
 411 {
 412         type_t  *return_type  = skip_typeref(function_type->return_type);
 413
 414         ident   *id           = id_unique("functiontype.%u");
 415         int      n_parameters = count_parameters(function_type);
 416         int      n_results    = return_type == type_void ? 0 : 1;
 417         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 418
 419         if (return_type != type_void) {
 420                 ir_type *restype = get_ir_type(return_type);
 421                 set_method_res_type(irtype, 0, restype);
 422         }
 423
 424         function_parameter_t *parameter = function_type->parameters;
 425         int                   n         = 0;
 426         for ( ; parameter != NULL; parameter = parameter->next) {
 427                 type_t  *type     = get_parameter_type(parameter->type);
 428                 ir_type *p_irtype = get_ir_type(type);
 429                 set_method_param_type(irtype, n, p_irtype);
 430                 ++n;
 431         }
 432
 433         if (function_type->variadic || function_type->unspecified_parameters) {
 434                 set_method_variadicity(irtype, variadicity_variadic);
 435         }
 436
 437         unsigned cc = get_method_calling_convention(irtype);
 438         switch (function_type->calling_convention) {
 439         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 440         case CC_CDECL:
 441 is_cdecl:
 442                 set_method_calling_convention(irtype, SET_CDECL(cc));
 443                 break;
 444
 445         case CC_STDCALL:
 446                 if (function_type->variadic || function_type->unspecified_parameters)
 447                         goto is_cdecl;
 448
 449                 /* only non-variadic function can use stdcall, else use cdecl */
 450                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 451                 break;
 452
 453         case CC_FASTCALL:
 454                 if (function_type->variadic || function_type->unspecified_parameters)
 455                         goto is_cdecl;
 456                 /* only non-variadic function can use fastcall, else use cdecl */
 457                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 458                 break;
 459
 460         case CC_THISCALL:
 461                 /* Hmm, leave default, not accepted by the parser yet. */
 462                 break;
 463         }
 464
 465         return irtype;
 466 }
 467
 468 static ir_type *create_pointer_type(pointer_type_t *type)
 469 {
 470         type_t   *points_to    = type->points_to;
 471         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 472         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 473                                                   ir_points_to, mode_P_data);
 474
 475         return ir_type;
 476 }
 477
 478 static ir_type *create_reference_type(reference_type_t *type)
 479 {
 480         type_t  *refers_to    = type->refers_to;
 481         ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
 482         ir_type *ir_type      = new_type_pointer(id_unique("reference.%u"),
 483                                                  ir_refers_to, mode_P_data);
 484
 485         return ir_type;
 486 }
 487
 488 static ir_type *create_array_type(array_type_t *type)
 489 {
 490         type_t  *element_type    = type->element_type;
 491         ir_type *ir_element_type = get_ir_type(element_type);
 492
 493         ident    *id      = id_unique("array.%u");
 494         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 495
 496         const int align = get_type_alignment_bytes(ir_element_type);
 497         set_type_alignment_bytes(ir_type, align);
 498
 499         if (type->size_constant) {
 500                 int n_elements = type->size;
 501
 502                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 503
 504                 size_t elemsize = get_type_size_bytes(ir_element_type);
 505                 if (elemsize % align > 0) {
 506                         elemsize += align - (elemsize % align);
 507                 }
 508                 set_type_size_bytes(ir_type, n_elements * elemsize);
 509         } else {
 510                 set_array_lower_bound_int(ir_type, 0, 0);
 511         }
 512         set_type_state(ir_type, layout_fixed);
 513
 514         return ir_type;
 515 }
 516
 517 /**
 518  * Return the signed integer type of size bits.
 519  *
 520  * @param size   the size
 521  */
 522 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 523                                                  unsigned size)
 524 {
 525         static ir_mode *s_modes[64 + 1] = {NULL, };
 526         ir_type *res;
 527         ir_mode *mode;
 528
 529         if (size <= 0 || size > 64)
 530                 return NULL;
 531
 532         mode = s_modes[size];
 533         if (mode == NULL) {
 534                 char name[32];
 535
 536                 snprintf(name, sizeof(name), "bf_I%u", size);
 537                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 538                                    size <= 32 ? 32 : size );
 539                 s_modes[size] = mode;
 540         }
 541
 542         char name[32];
 543         snprintf(name, sizeof(name), "I%u", size);
 544         ident *id = new_id_from_str(name);
 545         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 546         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 547         set_primitive_base_type(res, base_tp);
 548
 549         return res;
 550 }
 551
 552 /**
 553  * Return the unsigned integer type of size bits.
 554  *
 555  * @param size   the size
 556  */
 557 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 558                                                    unsigned size)
 559 {
 560         static ir_mode *u_modes[64 + 1] = {NULL, };
 561         ir_type *res;
 562         ir_mode *mode;
 563
 564         if (size <= 0 || size > 64)
 565                 return NULL;
 566
 567         mode = u_modes[size];
 568         if (mode == NULL) {
 569                 char name[32];
 570
 571                 snprintf(name, sizeof(name), "bf_U%u", size);
 572                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 573                                    size <= 32 ? 32 : size );
 574                 u_modes[size] = mode;
 575         }
 576
 577         char name[32];
 578
 579         snprintf(name, sizeof(name), "U%u", size);
 580         ident *id = new_id_from_str(name);
 581         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 582         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 583         set_primitive_base_type(res, base_tp);
 584
 585         return res;
 586 }
 587
 588 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 589 {
 590         type_t *base = skip_typeref(type->base_type);
 591         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 592         ir_type *irbase = get_ir_type(base);
 593
 594         unsigned size = type->bit_size;
 595
 596         assert(!is_type_float(base));
 597         if (is_type_signed(base)) {
 598                 return get_signed_int_type_for_bit_size(irbase, size);
 599         } else {
 600                 return get_unsigned_int_type_for_bit_size(irbase, size);
 601         }
 602 }
 603
 604 #define INVALID_TYPE ((ir_type_ptr)-1)
 605
 606 enum {
 607         COMPOUND_IS_STRUCT = false,
 608         COMPOUND_IS_UNION  = true
 609 };
 610
 611 /**
 612  * Construct firm type from ast struct type.
 613  *
 614  * As anonymous inner structs get flattened to a single firm type, we might get
 615  * irtype, outer_offset and out_align passed (they represent the position of
 616  * the anonymous inner struct inside the resulting firm struct)
 617  */
 618 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 619                                      size_t *outer_offset, size_t *outer_align,
 620                                      bool incomplete, bool is_union)
 621 {
 622         compound_t *compound = type->compound;
 623
 624         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 625                 return compound->irtype;
 626         }
 627
 628         size_t align_all  = 1;
 629         size_t offset     = 0;
 630         size_t bit_offset = 0;
 631         size_t size       = 0;
 632
 633         if (irtype == NULL) {
 634                 symbol_t *symbol = compound->base.symbol;
 635                 ident    *id;
 636                 if (symbol != NULL) {
 637                         id = new_id_from_str(symbol->string);
 638                 } else {
 639                         if (is_union) {
 640                                 id = id_unique("__anonymous_union.%u");
 641                         } else {
 642                                 id = id_unique("__anonymous_struct.%u");
 643                         }
 644                 }
 645                 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 646
 647                 if (is_union) {
 648                         irtype = new_d_type_union(id, dbgi);
 649                 } else {
 650                         irtype = new_d_type_struct(id, dbgi);
 651                 }
 652
 653                 compound->irtype_complete = false;
 654                 compound->irtype          = irtype;
 655         } else {
 656                 offset    = *outer_offset;
 657                 align_all = *outer_align;
 658         }
 659
 660         if (incomplete)
 661                 return irtype;
 662
 663         compound->irtype_complete = true;
 664
 665         entity_t *entry = compound->members.entities;
 666         for ( ; entry != NULL; entry = entry->base.next) {
 667                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 668                         continue;
 669
 670                 size_t prev_offset = offset;
 671
 672                 symbol_t *symbol     = entry->base.symbol;
 673                 type_t   *entry_type = skip_typeref(entry->declaration.type);
 674                 entry_type
 675                         = get_aligned_type(entry_type, entry->compound_member.alignment);
 676                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 677
 678                 ident    *ident;
 679                 if (symbol != NULL) {
 680                         ident = new_id_from_str(symbol->string);
 681                 } else {
 682                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 683                                 create_compound_type(&entry_type->compound, irtype, &offset,
 684                                                      &align_all, false, COMPOUND_IS_STRUCT);
 685                                 goto finished_member;
 686                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 687                                 create_compound_type(&entry_type->compound, irtype, &offset,
 688                                                      &align_all, false, COMPOUND_IS_UNION);
 689                                 goto finished_member;
 690                         } else {
 691                                 assert(entry_type->kind == TYPE_BITFIELD);
 692                         }
 693                         ident = id_unique("anon.%u");
 694                 }
 695
 696                 ir_type *base_irtype;
 697                 if (entry_type->kind == TYPE_BITFIELD) {
 698                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 699                 } else {
 700                         base_irtype = get_ir_type(entry_type);
 701                 }
 702
 703                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 704                 size_t misalign        = offset % entry_alignment;
 705
 706                 ir_type   *entry_irtype = get_ir_type(entry_type);
 707                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 708
 709                 size_t base;
 710                 size_t bits_remainder;
 711                 if (entry_type->kind == TYPE_BITFIELD) {
 712                         size_t size_bits      = entry_type->bitfield.bit_size;
 713                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 714
 715                         if (size_bits > rest_size_bits) {
 716                                 /* start a new bucket */
 717                                 offset     += entry_alignment - misalign;
 718                                 bit_offset  = 0;
 719
 720                                 base           = offset;
 721                                 bits_remainder = 0;
 722                         } else {
 723                                 /* put into current bucket */
 724                                 base           = offset - misalign;
 725                                 bits_remainder = misalign * 8 + bit_offset;
 726                         }
 727
 728                         offset     += size_bits / 8;
 729                         bit_offset  = bit_offset + (size_bits % 8);
 730                 } else {
 731                         size_t entry_size = get_type_size_bytes(base_irtype);
 732                         if (misalign > 0 || bit_offset > 0)
 733                                 offset += entry_alignment - misalign;
 734
 735                         base           = offset;
 736                         bits_remainder = 0;
 737                         offset        += entry_size;
 738                         bit_offset     = 0;
 739                 }
 740
 741                 if (entry_alignment > align_all) {
 742                         if (entry_alignment % align_all != 0) {
 743                                 panic("uneven alignments not supported yet");
 744                         }
 745                         align_all = entry_alignment;
 746                 }
 747
 748                 set_entity_offset(entity, base);
 749                 set_entity_offset_bits_remainder(entity,
 750                                                  (unsigned char) bits_remainder);
 751                 //add_struct_member(irtype, entity);
 752                 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
 753                 assert(entry->compound_member.entity == NULL);
 754                 entry->compound_member.entity = entity;
 755
 756 finished_member:
 757                 if (is_union) {
 758                         size_t entry_size = offset - prev_offset;
 759                         if (entry_size > size) {
 760                                 size = entry_size;
 761                         }
 762                         offset     = 0;
 763                         bit_offset = 0;
 764                 }
 765         }
 766
 767         if (!is_union) {
 768                 size = offset;
 769         }
 770
 771         size_t misalign = offset % align_all;
 772         if (misalign > 0 || bit_offset > 0) {
 773                 size += align_all - misalign;
 774         }
 775
 776         if (outer_offset != NULL) {
 777                 if (!is_union) {
 778                         *outer_offset = offset;
 779                 } else {
 780                         *outer_offset += size;
 781                 }
 782
 783                 if (align_all > *outer_align) {
 784                         if (align_all % *outer_align != 0) {
 785                                 panic("uneven alignments not supported yet");
 786                         }
 787                         *outer_align = align_all;
 788                 }
 789         } else {
 790                 set_type_alignment_bytes(irtype, align_all);
 791                 set_type_size_bytes(irtype, size);
 792                 set_type_state(irtype, layout_fixed);
 793         }
 794
 795         return irtype;
 796 }
 797
 798 static ir_type *create_enum_type(enum_type_t *const type)
 799 {
 800         type->base.firm_type = ir_type_int;
 801
 802         ir_mode *const mode    = mode_int;
 803         tarval  *const one     = get_mode_one(mode);
 804         tarval  *      tv_next = get_tarval_null(mode);
 805
 806         bool constant_folding_old = constant_folding;
 807         constant_folding = true;
 808
 809         enum_t   *enume = type->enume;
 810         entity_t *entry = enume->base.next;
 811         for (; entry != NULL; entry = entry->base.next) {
 812                 if (entry->kind != ENTITY_ENUM_VALUE)
 813                         break;
 814
 815                 expression_t *const init = entry->enum_value.value;
 816                 if (init != NULL) {
 817                         ir_node *const cnst = expression_to_firm(init);
 818                         if (!is_Const(cnst)) {
 819                                 panic("couldn't fold constant");
 820                         }
 821                         tv_next = get_Const_tarval(cnst);
 822                 }
 823                 entry->enum_value.tv = tv_next;
 824                 tv_next = tarval_add(tv_next, one);
 825         }
 826
 827         constant_folding = constant_folding_old;
 828
 829         return ir_type_int;
 830 }
 831
 832 static ir_type *get_ir_type_incomplete(type_t *type)
 833 {
 834         assert(type != NULL);
 835         type = skip_typeref(type);
 836
 837         if (type->base.firm_type != NULL) {
 838                 assert(type->base.firm_type != INVALID_TYPE);
 839                 return type->base.firm_type;
 840         }
 841
 842         switch (type->kind) {
 843         case TYPE_COMPOUND_STRUCT:
 844                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 845                                             true, COMPOUND_IS_STRUCT);
 846         case TYPE_COMPOUND_UNION:
 847                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 848                                             true, COMPOUND_IS_UNION);
 849         default:
 850                 return get_ir_type(type);
 851         }
 852 }
 853
 854 ir_type *get_ir_type(type_t *type)
 855 {
 856         assert(type != NULL);
 857
 858         type = skip_typeref(type);
 859
 860         if (type->base.firm_type != NULL) {
 861                 assert(type->base.firm_type != INVALID_TYPE);
 862                 return type->base.firm_type;
 863         }
 864
 865         ir_type *firm_type = NULL;
 866         switch (type->kind) {
 867         case TYPE_ERROR:
 868                 /* Happens while constant folding, when there was an error */
 869                 return create_atomic_type(&type_void->atomic);
 870
 871         case TYPE_ATOMIC:
 872                 firm_type = create_atomic_type(&type->atomic);
 873                 break;
 874         case TYPE_COMPLEX:
 875                 firm_type = create_complex_type(&type->complex);
 876                 break;
 877         case TYPE_IMAGINARY:
 878                 firm_type = create_imaginary_type(&type->imaginary);
 879                 break;
 880         case TYPE_FUNCTION:
 881                 firm_type = create_method_type(&type->function);
 882                 break;
 883         case TYPE_POINTER:
 884                 firm_type = create_pointer_type(&type->pointer);
 885                 break;
 886         case TYPE_REFERENCE:
 887                 firm_type = create_reference_type(&type->reference);
 888                 break;
 889         case TYPE_ARRAY:
 890                 firm_type = create_array_type(&type->array);
 891                 break;
 892         case TYPE_COMPOUND_STRUCT:
 893                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 894                                                  false, COMPOUND_IS_STRUCT);
 895                 break;
 896         case TYPE_COMPOUND_UNION:
 897                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 898                                                  false, COMPOUND_IS_UNION);
 899                 break;
 900         case TYPE_ENUM:
 901                 firm_type = create_enum_type(&type->enumt);
 902                 break;
 903         case TYPE_BUILTIN:
 904                 firm_type = get_ir_type(type->builtin.real_type);
 905                 break;
 906         case TYPE_BITFIELD:
 907                 firm_type = create_bitfield_type(&type->bitfield);
 908                 break;
 909
 910         case TYPE_TYPEOF:
 911         case TYPE_TYPEDEF:
 912         case TYPE_INVALID:
 913                 break;
 914         }
 915         if (firm_type == NULL)
 916                 panic("unknown type found");
 917
 918         type->base.firm_type = firm_type;
 919         return firm_type;
 920 }
 921
 922 static ir_mode *get_ir_mode_storage(type_t *type)
 923 {
 924         ir_type *irtype = get_ir_type(type);
 925
 926         /* firm doesn't report a mode for arrays somehow... */
 927         if (is_Array_type(irtype)) {
 928                 return mode_P_data;
 929         }
 930
 931         ir_mode *mode = get_type_mode(irtype);
 932         assert(mode != NULL);
 933         return mode;
 934 }
 935
 936 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 937 {
 938         ir_mode *mode = get_ir_mode_storage(type);
 939         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 940                 return mode_float_arithmetic;
 941         }
 942
 943         return mode;
 944 }
 945
 946 /** Names of the runtime functions. */
 947 static const struct {
 948         int        id;           /**< the rts id */
 949         int        n_res;        /**< number of return values */
 950         const char *name;        /**< the name of the rts function */
 951         int        n_params;     /**< number of parameters */
 952         unsigned   flags;        /**< language flags */
 953 } rts_data[] = {
 954         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 955         { rts_abort,      0, "abort",        0, _C89 },
 956         { rts_alloca,     1, "alloca",       1, _ALL },
 957         { rts_abs,        1, "abs",          1, _C89 },
 958         { rts_labs,       1, "labs",         1, _C89 },
 959         { rts_llabs,      1, "llabs",        1, _C99 },
 960         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 961
 962         { rts_fabs,       1, "fabs",         1, _C89 },
 963         { rts_sqrt,       1, "sqrt",         1, _C89 },
 964         { rts_cbrt,       1, "cbrt",         1, _C99 },
 965         { rts_exp,        1, "exp",          1, _C89 },
 966         { rts_exp2,       1, "exp2",         1, _C89 },
 967         { rts_exp10,      1, "exp10",        1, _GNUC },
 968         { rts_log,        1, "log",          1, _C89 },
 969         { rts_log2,       1, "log2",         1, _C89 },
 970         { rts_log10,      1, "log10",        1, _C89 },
 971         { rts_pow,        1, "pow",          2, _C89 },
 972         { rts_sin,        1, "sin",          1, _C89 },
 973         { rts_cos,        1, "cos",          1, _C89 },
 974         { rts_tan,        1, "tan",          1, _C89 },
 975         { rts_asin,       1, "asin",         1, _C89 },
 976         { rts_acos,       1, "acos",         1, _C89 },
 977         { rts_atan,       1, "atan",         1, _C89 },
 978         { rts_sinh,       1, "sinh",         1, _C89 },
 979         { rts_cosh,       1, "cosh",         1, _C89 },
 980         { rts_tanh,       1, "tanh",         1, _C89 },
 981
 982         { rts_fabsf,      1, "fabsf",        1, _C99 },
 983         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 984         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 985         { rts_expf,       1, "expf",         1, _C99 },
 986         { rts_exp2f,      1, "exp2f",        1, _C99 },
 987         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 988         { rts_logf,       1, "logf",         1, _C99 },
 989         { rts_log2f,      1, "log2f",        1, _C99 },
 990         { rts_log10f,     1, "log10f",       1, _C99 },
 991         { rts_powf,       1, "powf",         2, _C99 },
 992         { rts_sinf,       1, "sinf",         1, _C99 },
 993         { rts_cosf,       1, "cosf",         1, _C99 },
 994         { rts_tanf,       1, "tanf",         1, _C99 },
 995         { rts_asinf,      1, "asinf",        1, _C99 },
 996         { rts_acosf,      1, "acosf",        1, _C99 },
 997         { rts_atanf,      1, "atanf",        1, _C99 },
 998         { rts_sinhf,      1, "sinhf",        1, _C99 },
 999         { rts_coshf,      1, "coshf",        1, _C99 },
1000         { rts_tanhf,      1, "tanhf",        1, _C99 },
1001
1002         { rts_fabsl,      1, "fabsl",        1, _C99 },
1003         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
1004         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
1005         { rts_expl,       1, "expl",         1, _C99 },
1006         { rts_exp2l,      1, "exp2l",        1, _C99 },
1007         { rts_exp10l,     1, "exp10l",       1, _GNUC },
1008         { rts_logl,       1, "logl",         1, _C99 },
1009         { rts_log2l,      1, "log2l",        1, _C99 },
1010         { rts_log10l,     1, "log10l",       1, _C99 },
1011         { rts_powl,       1, "powl",         2, _C99 },
1012         { rts_sinl,       1, "sinl",         1, _C99 },
1013         { rts_cosl,       1, "cosl",         1, _C99 },
1014         { rts_tanl,       1, "tanl",         1, _C99 },
1015         { rts_asinl,      1, "asinl",        1, _C99 },
1016         { rts_acosl,      1, "acosl",        1, _C99 },
1017         { rts_atanl,      1, "atanl",        1, _C99 },
1018         { rts_sinhl,      1, "sinhl",        1, _C99 },
1019         { rts_coshl,      1, "coshl",        1, _C99 },
1020         { rts_tanhl,      1, "tanhl",        1, _C99 },
1021
1022         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
1023         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
1024         { rts_strcmp,     1, "strcmp",       2, _C89 },
1025         { rts_strncmp,    1, "strncmp",      3, _C89 }
1026 };
1027
1028 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
1029
1030 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
1031
1032 /**
1033  * Handle GNU attributes for entities
1034  *
1035  * @param ent   the entity
1036  * @param decl  the routine declaration
1037  */
1038 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
1039 {
1040         assert(is_declaration(entity));
1041         decl_modifiers_t modifiers = entity->declaration.modifiers;
1042         if (modifiers & DM_PURE) {
1043                 /* TRUE if the declaration includes the GNU
1044                    __attribute__((pure)) specifier. */
1045                 set_entity_additional_property(irentity, mtp_property_pure);
1046         }
1047         if (modifiers & DM_CONST) {
1048                 set_entity_additional_property(irentity, mtp_property_const);
1049                 have_const_functions = true;
1050         }
1051         if (modifiers & DM_USED) {
1052                 /* TRUE if the declaration includes the GNU
1053                    __attribute__((used)) specifier. */
1054                 set_entity_stickyness(irentity, stickyness_sticky);
1055         }
1056 }
1057
1058 static bool is_main(entity_t *entity)
1059 {
1060         static symbol_t *sym_main = NULL;
1061         if (sym_main == NULL) {
1062                 sym_main = symbol_table_insert("main");
1063         }
1064
1065         if (entity->base.symbol != sym_main)
1066                 return false;
1067         /* must be in outermost scope */
1068         if (entity->base.parent_scope != &current_translation_unit->scope)
1069                 return false;
1070
1071         return true;
1072 }
1073
1074 /**
1075  * Creates an entity representing a function.
1076  *
1077  * @param declaration  the function declaration
1078  */
1079 static ir_entity *get_function_entity(entity_t *entity)
1080 {
1081         assert(entity->kind == ENTITY_FUNCTION);
1082         if (entity->function.entity != NULL) {
1083                 return entity->function.entity;
1084         }
1085
1086         if (is_main(entity)) {
1087                 /* force main to C linkage */
1088                 type_t *type = entity->declaration.type;
1089                 assert(is_type_function(type));
1090                 if (type->function.linkage != LINKAGE_C) {
1091                         type_t *new_type           = duplicate_type(type);
1092                         new_type->function.linkage = LINKAGE_C;
1093
1094                         type = typehash_insert(new_type);
1095                         if (type != new_type) {
1096                                 obstack_free(type_obst, new_type);
1097                         }
1098                         entity->declaration.type = type;
1099                 }
1100         }
1101
1102         symbol_t *symbol = entity->base.symbol;
1103         ident    *id     = new_id_from_str(symbol->string);
1104
1105         ir_type   *global_type    = get_glob_type();
1106         ir_type   *ir_type_method = get_ir_type(entity->declaration.type);
1107         bool const has_body       = entity->function.statement != NULL;
1108
1109         /* already an entity defined? */
1110         ir_entity *irentity = entitymap_get(&entitymap, symbol);
1111         if (irentity != NULL) {
1112                 if (get_entity_visibility(irentity) == visibility_external_allocated
1113                                 && has_body) {
1114                         set_entity_visibility(irentity, visibility_external_visible);
1115                 }
1116                 goto entity_created;
1117         }
1118
1119         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1120         irentity             = new_d_entity(global_type, id, ir_type_method, dbgi);
1121         set_entity_ld_ident(irentity, create_ld_ident(entity));
1122
1123         handle_gnu_attributes_ent(irentity, entity);
1124
1125         /* static inline             => local
1126          * extern inline             => local
1127          * inline without definition => local
1128          * inline with definition    => external_visible */
1129         storage_class_tag_t const storage_class
1130                 = (storage_class_tag_t) entity->declaration.storage_class;
1131         bool                const is_inline     = entity->function.is_inline;
1132         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1133                 set_entity_visibility(irentity, visibility_external_visible);
1134         } else if (storage_class == STORAGE_CLASS_STATIC ||
1135                    (is_inline && has_body)) {
1136                 if (!has_body) {
1137                         /* this entity was declared, but is defined nowhere */
1138                         set_entity_peculiarity(irentity, peculiarity_description);
1139                 }
1140                 set_entity_visibility(irentity, visibility_local);
1141         } else if (has_body) {
1142                 set_entity_visibility(irentity, visibility_external_visible);
1143         } else {
1144                 set_entity_visibility(irentity, visibility_external_allocated);
1145         }
1146         set_entity_allocation(irentity, allocation_static);
1147
1148         /* We should check for file scope here, but as long as we compile C only
1149            this is not needed. */
1150         if (! firm_opt.freestanding) {
1151                 /* check for a known runtime function */
1152                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1153                         if (id != rts_idents[i])
1154                                 continue;
1155
1156                         /* ignore those rts functions not necessary needed for current mode */
1157                         if ((c_mode & rts_data[i].flags) == 0)
1158                                 continue;
1159                         assert(rts_entities[rts_data[i].id] == NULL);
1160                         rts_entities[rts_data[i].id] = irentity;
1161                 }
1162         }
1163
1164         entitymap_insert(&entitymap, symbol, irentity);
1165
1166 entity_created:
1167         entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1168         entity->function.entity  = irentity;
1169
1170         return irentity;
1171 }
1172
1173 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1174 {
1175         ir_mode *value_mode = get_irn_mode(value);
1176
1177         if (value_mode == dest_mode || is_Bad(value))
1178                 return value;
1179
1180         if (dest_mode == mode_b) {
1181                 ir_node *zero = new_Const(get_mode_null(value_mode));
1182                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1183                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1184                 return proj;
1185         }
1186
1187         return new_d_Conv(dbgi, value, dest_mode);
1188 }
1189
1190 /**
1191  * Creates a Const node representing a constant.
1192  */
1193 static ir_node *const_to_firm(const const_expression_t *cnst)
1194 {
1195         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1196         type_t   *type = skip_typeref(cnst->base.type);
1197         ir_mode  *mode = get_ir_mode_storage(type);
1198
1199         char    buf[128];
1200         tarval *tv;
1201         size_t  len;
1202         if (mode_is_float(mode)) {
1203                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1204         } else {
1205                 if (mode_is_signed(mode)) {
1206                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1207                 } else {
1208                         len = snprintf(buf, sizeof(buf), "%llu",
1209                                        (unsigned long long) cnst->v.int_value);
1210                 }
1211                 tv = new_tarval_from_str(buf, len, mode);
1212         }
1213
1214         ir_node *res        = new_d_Const(dbgi, tv);
1215         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1216         return create_conv(dbgi, res, mode_arith);
1217 }
1218
1219 /**
1220  * Creates a Const node representing a character constant.
1221  */
1222 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1223 {
1224         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1225         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1226
1227         long long int v = 0;
1228         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1229                 if (char_is_signed) {
1230                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1231                 } else {
1232                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1233                 }
1234         }
1235         char    buf[128];
1236         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1237         tarval *tv = new_tarval_from_str(buf, len, mode);
1238
1239         return new_d_Const(dbgi, tv);
1240 }
1241
1242 /**
1243  * Creates a Const node representing a wide character constant.
1244  */
1245 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1246 {
1247         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1248         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1249
1250         long long int v = cnst->v.wide_character.begin[0];
1251
1252         char    buf[128];
1253         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1254         tarval *tv = new_tarval_from_str(buf, len, mode);
1255
1256         return new_d_Const(dbgi, tv);
1257 }
1258
1259 /**
1260  * Creates a SymConst for a given entity.
1261  *
1262  * @param dbgi    debug info
1263  * @param mode    the (reference) mode for the SymConst
1264  * @param entity  the entity
1265  */
1266 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1267                               ir_entity *entity)
1268 {
1269         assert(entity != NULL);
1270         union symconst_symbol sym;
1271         sym.entity_p = entity;
1272         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1273 }
1274
1275 /**
1276  * Creates a SymConst node representing a string constant.
1277  *
1278  * @param src_pos    the source position of the string constant
1279  * @param id_prefix  a prefix for the name of the generated string constant
1280  * @param value      the value of the string constant
1281  */
1282 static ir_node *string_to_firm(const source_position_t *const src_pos,
1283                                const char *const id_prefix,
1284                                const string_t *const value)
1285 {
1286         ir_type  *const global_type = get_glob_type();
1287         dbg_info *const dbgi        = get_dbg_info(src_pos);
1288         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1289                                                        ir_type_const_char, dbgi);
1290
1291         ident     *const id     = id_unique(id_prefix);
1292         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1293         set_entity_ld_ident(entity, id);
1294         set_entity_variability(entity, variability_constant);
1295         set_entity_allocation(entity, allocation_static);
1296
1297         ir_type *const elem_type = ir_type_const_char;
1298         ir_mode *const mode      = get_type_mode(elem_type);
1299
1300         const char* const string = value->begin;
1301         const size_t      slen   = value->size;
1302
1303         set_array_lower_bound_int(type, 0, 0);
1304         set_array_upper_bound_int(type, 0, slen);
1305         set_type_size_bytes(type, slen);
1306         set_type_state(type, layout_fixed);
1307
1308         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1309         for (size_t i = 0; i < slen; ++i) {
1310                 tvs[i] = new_tarval_from_long(string[i], mode);
1311         }
1312
1313         set_array_entity_values(entity, tvs, slen);
1314         free(tvs);
1315
1316         return create_symconst(dbgi, mode_P_data, entity);
1317 }
1318
1319 /**
1320  * Creates a SymConst node representing a string literal.
1321  *
1322  * @param literal   the string literal
1323  */
1324 static ir_node *string_literal_to_firm(
1325                 const string_literal_expression_t* literal)
1326 {
1327         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1328                               &literal->value);
1329 }
1330
1331 /**
1332  * Creates a SymConst node representing a wide string literal.
1333  *
1334  * @param literal   the wide string literal
1335  */
1336 static ir_node *wide_string_literal_to_firm(
1337         const wide_string_literal_expression_t* const literal)
1338 {
1339         ir_type *const global_type = get_glob_type();
1340         ir_type *const elem_type   = ir_type_wchar_t;
1341         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1342         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1343                                                     elem_type, dbgi);
1344
1345         ident     *const id     = id_unique("Lstr.%u");
1346         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1347         set_entity_ld_ident(entity, id);
1348         set_entity_variability(entity, variability_constant);
1349         set_entity_allocation(entity, allocation_static);
1350
1351         ir_mode *const mode      = get_type_mode(elem_type);
1352
1353         const wchar_rep_t *const string = literal->value.begin;
1354         const size_t             slen   = literal->value.size;
1355
1356         set_array_lower_bound_int(type, 0, 0);
1357         set_array_upper_bound_int(type, 0, slen);
1358         set_type_size_bytes(type, slen);
1359         set_type_state(type, layout_fixed);
1360
1361         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1362         for (size_t i = 0; i < slen; ++i) {
1363                 tvs[i] = new_tarval_from_long(string[i], mode);
1364         }
1365
1366         set_array_entity_values(entity, tvs, slen);
1367         free(tvs);
1368
1369         return create_symconst(dbgi, mode_P_data, entity);
1370 }
1371
1372 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1373                                       ir_node *const addr)
1374 {
1375         ir_type *irtype = get_ir_type(type);
1376         if (is_compound_type(irtype)
1377                         || is_Method_type(irtype)
1378                         || is_Array_type(irtype)) {
1379                 return addr;
1380         }
1381
1382         ir_mode *const mode     = get_type_mode(irtype);
1383         ir_node *const memory   = get_store();
1384         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1385         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1386         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1387
1388         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE && !is_Bad(load)) {
1389                 set_Load_volatility(load, volatility_is_volatile);
1390         }
1391
1392         set_store(load_mem);
1393
1394         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1395         return create_conv(dbgi, load_res, mode_arithmetic);
1396 }
1397
1398 /**
1399  * Creates a strict Conv if neccessary.
1400  */
1401 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1402 {
1403         ir_mode *mode = get_irn_mode(node);
1404
1405         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1406                 return node;
1407         if (!mode_is_float(mode))
1408                 return node;
1409
1410         /* check if there is already a Conv */
1411         if (is_Conv(node)) {
1412                 /* convert it into a strict Conv */
1413                 set_Conv_strict(node, 1);
1414                 return node;
1415         }
1416
1417         /* otherwise create a new one */
1418         return new_d_strictConv(dbgi, node, mode);
1419 }
1420
1421 static ir_node *get_global_var_address(dbg_info *const dbgi,
1422                                        const entity_t *const entity)
1423 {
1424         assert(entity->kind == ENTITY_VARIABLE);
1425         assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1426
1427         ir_entity *const irentity = entity->variable.v.entity;
1428         if (entity->variable.thread_local) {
1429                 ir_node *const no_mem = new_NoMem();
1430                 ir_node *const tls    = get_irg_tls(current_ir_graph);
1431                 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1432         } else {
1433                 return create_symconst(dbgi, mode_P_data, irentity);
1434         }
1435 }
1436
1437 /**
1438  * Returns the correct base address depending on whether it is a parameter or a
1439  * normal local variable.
1440  */
1441 static ir_node *get_local_frame(ir_entity *const ent)
1442 {
1443         ir_graph      *const irg   = current_ir_graph;
1444         const ir_type *const owner = get_entity_owner(ent);
1445         if (owner == get_irg_frame_type(irg)) {
1446                 return get_irg_frame(irg);
1447         } else {
1448                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1449                 return get_irg_value_param_base(irg);
1450         }
1451 }
1452
1453 /**
1454  * Keep all memory edges of the given block.
1455  */
1456 static void keep_all_memory(ir_node *block) {
1457         ir_node *old = get_cur_block();
1458
1459         set_cur_block(block);
1460         keep_alive(get_store());
1461         /* TODO: keep all memory edges from restricted pointers */
1462         set_cur_block(old);
1463 }
1464
1465 static ir_node *reference_expression_enum_value_to_firm(
1466                 const reference_expression_t *ref)
1467 {
1468         entity_t *entity = ref->entity;
1469         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1470         /* make sure the type is constructed */
1471         (void) get_ir_type(type);
1472
1473         return new_Const(entity->enum_value.tv);
1474 }
1475
1476 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1477 {
1478         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1479         entity_t *entity = ref->entity;
1480         assert(is_declaration(entity));
1481         type_t   *type   = skip_typeref(entity->declaration.type);
1482
1483         /* make sure the type is constructed */
1484         (void) get_ir_type(type);
1485
1486         switch ((declaration_kind_t) entity->declaration.kind) {
1487         case DECLARATION_KIND_UNKNOWN:
1488                 break;
1489
1490         case DECLARATION_KIND_LOCAL_VARIABLE: {
1491                 ir_mode *const mode  = get_ir_mode_storage(type);
1492                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1493                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1494         }
1495         case DECLARATION_KIND_PARAMETER: {
1496                 ir_mode *const mode  = get_ir_mode_storage(type);
1497                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1498                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1499         }
1500         case DECLARATION_KIND_FUNCTION: {
1501                 ir_mode *const mode = get_ir_mode_storage(type);
1502                 return create_symconst(dbgi, mode, entity->function.entity);
1503         }
1504         case DECLARATION_KIND_INNER_FUNCTION: {
1505                 ir_mode *const mode = get_ir_mode_storage(type);
1506                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1507                         /* inner function not using the closure */
1508                         return create_symconst(dbgi, mode, entity->function.entity);
1509                 } else {
1510                         /* TODO: need trampoline here */
1511                         panic("Trampoline code not implemented");
1512                         return create_symconst(dbgi, mode, entity->function.entity);
1513                 }
1514         }
1515         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1516                 ir_node *const addr = get_global_var_address(dbgi, entity);
1517                 return deref_address(dbgi, entity->declaration.type, addr);
1518         }
1519
1520         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1521                 ir_entity *irentity = entity->variable.v.entity;
1522                 ir_node   *frame    = get_local_frame(irentity);
1523                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1524                 return deref_address(dbgi, entity->declaration.type, sel);
1525         }
1526         case DECLARATION_KIND_PARAMETER_ENTITY: {
1527                 ir_entity *irentity = entity->parameter.v.entity;
1528                 ir_node   *frame    = get_local_frame(irentity);
1529                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1530                 return deref_address(dbgi, entity->declaration.type, sel);
1531         }
1532
1533         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1534                 return entity->variable.v.vla_base;
1535
1536         case DECLARATION_KIND_COMPOUND_MEMBER:
1537                 panic("not implemented reference type");
1538         }
1539
1540         panic("reference to declaration with unknown type found");
1541 }
1542
1543 static ir_node *reference_addr(const reference_expression_t *ref)
1544 {
1545         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1546         entity_t *entity = ref->entity;
1547         assert(is_declaration(entity));
1548
1549         switch((declaration_kind_t) entity->declaration.kind) {
1550         case DECLARATION_KIND_UNKNOWN:
1551                 break;
1552         case DECLARATION_KIND_PARAMETER:
1553         case DECLARATION_KIND_LOCAL_VARIABLE:
1554                 /* you can store to a local variable (so we don't panic but return NULL
1555                  * as an indicator for no real address) */
1556                 return NULL;
1557         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1558                 ir_node *const addr = get_global_var_address(dbgi, entity);
1559                 return addr;
1560         }
1561         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1562                 ir_entity *irentity = entity->variable.v.entity;
1563                 ir_node   *frame    = get_local_frame(irentity);
1564                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1565
1566                 return sel;
1567         }
1568         case DECLARATION_KIND_PARAMETER_ENTITY: {
1569                 ir_entity *irentity = entity->parameter.v.entity;
1570                 ir_node   *frame    = get_local_frame(irentity);
1571                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1572
1573                 return sel;
1574         }
1575
1576         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1577                 return entity->variable.v.vla_base;
1578
1579         case DECLARATION_KIND_FUNCTION: {
1580                 type_t  *const type = skip_typeref(entity->declaration.type);
1581                 ir_mode *const mode = get_ir_mode_storage(type);
1582                 return create_symconst(dbgi, mode, entity->function.entity);
1583         }
1584
1585         case DECLARATION_KIND_INNER_FUNCTION:
1586         case DECLARATION_KIND_COMPOUND_MEMBER:
1587                 panic("not implemented reference type");
1588         }
1589
1590         panic("reference to declaration with unknown type found");
1591 }
1592
1593 /**
1594  * Transform calls to builtin functions.
1595  */
1596 static ir_node *process_builtin_call(const call_expression_t *call)
1597 {
1598         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1599
1600         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1601         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1602
1603         type_t *type = skip_typeref(builtin->base.type);
1604         assert(is_type_pointer(type));
1605
1606         type_t   *function_type = skip_typeref(type->pointer.points_to);
1607         symbol_t *symbol        = builtin->symbol;
1608
1609         switch(symbol->ID) {
1610         case T___builtin_alloca: {
1611                 if (call->arguments == NULL || call->arguments->next != NULL) {
1612                         panic("invalid number of parameters on __builtin_alloca");
1613                 }
1614                 expression_t *argument = call->arguments->expression;
1615                 ir_node      *size     = expression_to_firm(argument);
1616
1617                 ir_node *store  = get_store();
1618                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1619                                               stack_alloc);
1620                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1621                 set_store(proj_m);
1622                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1623
1624                 return res;
1625         }
1626
1627         case T___builtin_huge_val:
1628         case T___builtin_inf:
1629         case T___builtin_inff:
1630         case T___builtin_infl: {
1631                 type_t  *type = function_type->function.return_type;
1632                 ir_mode *mode = get_ir_mode_arithmetic(type);
1633                 tarval  *tv   = get_mode_infinite(mode);
1634                 ir_node *res  = new_d_Const(dbgi, tv);
1635                 return   res;
1636         }
1637         case T___builtin_nan:
1638         case T___builtin_nanf:
1639         case T___builtin_nanl: {
1640                 /* Ignore string for now... */
1641                 assert(is_type_function(function_type));
1642                 type_t  *type = function_type->function.return_type;
1643                 ir_mode *mode = get_ir_mode_arithmetic(type);
1644                 tarval  *tv   = get_mode_NAN(mode);
1645                 ir_node *res  = new_d_Const(dbgi, tv);
1646                 return res;
1647         }
1648         case T___builtin_expect: {
1649                 expression_t *argument = call->arguments->expression;
1650                 return _expression_to_firm(argument);
1651         }
1652         case T___builtin_va_end:
1653                 /* evaluate the argument of va_end for its side effects */
1654                 _expression_to_firm(call->arguments->expression);
1655                 return NULL;
1656         default:
1657                 panic("unsupported builtin found");
1658         }
1659 }
1660
1661 /**
1662  * Transform a call expression.
1663  * Handles some special cases, like alloca() calls, which must be resolved
1664  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1665  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1666  * handled right...
1667  */
1668 static ir_node *call_expression_to_firm(const call_expression_t *call)
1669 {
1670         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1671         assert(get_cur_block() != NULL);
1672
1673         expression_t *function = call->function;
1674         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1675                 return process_builtin_call(call);
1676         }
1677         if (function->kind == EXPR_REFERENCE) {
1678                 const reference_expression_t *ref    = &function->reference;
1679                 entity_t                     *entity = ref->entity;
1680
1681                 if (entity->kind == ENTITY_FUNCTION
1682                                 && entity->function.entity == rts_entities[rts_alloca]) {
1683                         /* handle alloca() call */
1684                         expression_t *argument = call->arguments->expression;
1685                         ir_node      *size     = expression_to_firm(argument);
1686                         ir_mode      *mode     = get_ir_mode_arithmetic(type_size_t);
1687
1688                         size = create_conv(dbgi, size, mode);
1689
1690                         ir_node  *store  = get_store();
1691                         dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1692                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1693                                                        stack_alloc);
1694                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1695                         set_store(proj_m);
1696                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1697
1698                         return res;
1699                 }
1700         }
1701         ir_node *callee = expression_to_firm(function);
1702
1703         type_t *type = skip_typeref(function->base.type);
1704         assert(is_type_pointer(type));
1705         pointer_type_t *pointer_type = &type->pointer;
1706         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1707         assert(is_type_function(points_to));
1708         function_type_t *function_type = &points_to->function;
1709
1710         int      n_parameters = 0;
1711         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1712         ir_type *new_method_type = NULL;
1713         if (function_type->variadic || function_type->unspecified_parameters) {
1714                 const call_argument_t *argument = call->arguments;
1715                 for ( ; argument != NULL; argument = argument->next) {
1716                         ++n_parameters;
1717                 }
1718
1719                 /* we need to construct a new method type matching the call
1720                  * arguments... */
1721                 int n_res       = get_method_n_ress(ir_method_type);
1722                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1723                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1724                                                     n_parameters, n_res, dbgi);
1725                 set_method_calling_convention(new_method_type,
1726                                get_method_calling_convention(ir_method_type));
1727                 set_method_additional_properties(new_method_type,
1728                                get_method_additional_properties(ir_method_type));
1729                 set_method_variadicity(new_method_type,
1730                                        get_method_variadicity(ir_method_type));
1731
1732                 for (int i = 0; i < n_res; ++i) {
1733                         set_method_res_type(new_method_type, i,
1734                                             get_method_res_type(ir_method_type, i));
1735                 }
1736                 argument = call->arguments;
1737                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1738                         expression_t *expression = argument->expression;
1739                         ir_type      *irtype     = get_ir_type(expression->base.type);
1740                         set_method_param_type(new_method_type, i, irtype);
1741                 }
1742                 ir_method_type = new_method_type;
1743         } else {
1744                 n_parameters = get_method_n_params(ir_method_type);
1745         }
1746
1747         ir_node *in[n_parameters];
1748
1749         const call_argument_t *argument = call->arguments;
1750         for (int n = 0; n < n_parameters; ++n) {
1751                 expression_t *expression = argument->expression;
1752                 ir_node      *arg_node   = expression_to_firm(expression);
1753
1754                 type_t  *type = skip_typeref(expression->base.type);
1755                 if (!is_type_compound(type)) {
1756                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
1757                         arg_node      = create_conv(dbgi, arg_node, mode);
1758                         arg_node      = do_strict_conv(dbgi, arg_node);
1759                 }
1760
1761                 in[n] = arg_node;
1762
1763                 argument = argument->next;
1764         }
1765
1766         ir_node  *store = get_store();
1767         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1768                                      ir_method_type);
1769         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1770         set_store(mem);
1771
1772         type_t  *return_type = skip_typeref(function_type->return_type);
1773         ir_node *result      = NULL;
1774
1775         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1776                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1777
1778                 if (is_type_scalar(return_type)) {
1779                         ir_mode *mode       = get_ir_mode_storage(return_type);
1780                         result              = new_d_Proj(dbgi, resproj, mode, 0);
1781                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1782                         result              = create_conv(NULL, result, mode_arith);
1783                 } else {
1784                         ir_mode *mode = mode_P_data;
1785                         result        = new_d_Proj(dbgi, resproj, mode, 0);
1786                 }
1787         }
1788
1789         if (function->kind == EXPR_REFERENCE &&
1790             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1791                 /* A dead end:  Keep the Call and the Block.  Also place all further
1792                  * nodes into a new and unreachable block. */
1793                 keep_alive(node);
1794                 keep_alive(get_cur_block());
1795                 new_Block(0, NULL);
1796         }
1797
1798         return result;
1799 }
1800
1801 static void statement_to_firm(statement_t *statement);
1802 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1803
1804 static ir_node *expression_to_addr(const expression_t *expression);
1805 static ir_node *create_condition_evaluation(const expression_t *expression,
1806                                             ir_node *true_block,
1807                                             ir_node *false_block);
1808
1809 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1810                          ir_node *value)
1811 {
1812         if (!is_type_compound(type)) {
1813                 ir_mode *mode = get_ir_mode_storage(type);
1814                 value         = create_conv(dbgi, value, mode);
1815                 value         = do_strict_conv(dbgi, value);
1816         }
1817
1818         ir_node *memory = get_store();
1819
1820         if (is_type_scalar(type)) {
1821                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1822                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1823                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE && !is_Bad(store))
1824                         set_Store_volatility(store, volatility_is_volatile);
1825                 set_store(store_mem);
1826         } else {
1827                 ir_type *irtype    = get_ir_type(type);
1828                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1829                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1830                 set_store(copyb_mem);
1831         }
1832 }
1833
1834 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1835 {
1836         tarval *all_one   = get_mode_all_one(mode);
1837         int     mode_size = get_mode_size_bits(mode);
1838
1839         assert(offset >= 0);
1840         assert(size   >= 0);
1841         assert(offset + size <= mode_size);
1842         if (size == mode_size) {
1843                 return all_one;
1844         }
1845
1846         long    shiftr    = get_mode_size_bits(mode) - size;
1847         long    shiftl    = offset;
1848         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1849         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1850         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1851         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1852
1853         return mask1;
1854 }
1855
1856 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1857                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1858 {
1859         ir_type *entity_type = get_entity_type(entity);
1860         ir_type *base_type   = get_primitive_base_type(entity_type);
1861         assert(base_type != NULL);
1862         ir_mode *mode        = get_type_mode(base_type);
1863
1864         value = create_conv(dbgi, value, mode);
1865
1866         /* kill upper bits of value and shift to right position */
1867         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1868         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1869
1870         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1871         ir_node *mask_node       = new_d_Const(dbgi, mask);
1872         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1873         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1874         ir_node *shiftcount      = new_d_Const(dbgi, shiftl);
1875         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1876
1877         /* load current value */
1878         ir_node  *mem             = get_store();
1879         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1880         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1881         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1882         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1883         tarval   *inv_mask        = tarval_not(shift_mask);
1884         ir_node  *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1885         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1886
1887         /* construct new value and store */
1888         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1889         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1890         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1891         set_store(store_mem);
1892
1893         if (set_volatile) {
1894                 if (!is_Bad(load))
1895                         set_Load_volatility(load, volatility_is_volatile);
1896                 if (!is_Bad(store))
1897                         set_Store_volatility(store, volatility_is_volatile);
1898         }
1899
1900         return value_masked;
1901 }
1902
1903 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1904                 ir_node *addr)
1905 {
1906         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1907         type_t   *type     = expression->base.type;
1908         ir_mode  *mode     = get_ir_mode_storage(type);
1909         ir_node  *mem      = get_store();
1910         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1911         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1912         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1913
1914         load_res           = create_conv(dbgi, load_res, mode_int);
1915
1916         set_store(load_mem);
1917
1918         /* kill upper bits */
1919         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1920         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1921         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1922         ir_type   *entity_type  = get_entity_type(entity);
1923         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1924         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1925         assert(shift_bitsl >= 0);
1926         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1927         ir_node   *countl       = new_d_Const(dbgi, tvl);
1928         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1929
1930         long       shift_bitsr  = bitoffset + shift_bitsl;
1931         assert(shift_bitsr <= (long) machine_size);
1932         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1933         ir_node   *countr       = new_d_Const(dbgi, tvr);
1934         ir_node   *shiftr;
1935         if (mode_is_signed(mode)) {
1936                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1937         } else {
1938                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1939         }
1940
1941         return create_conv(dbgi, shiftr, mode);
1942 }
1943
1944 /* make sure the selected compound type is constructed */
1945 static void construct_select_compound(const select_expression_t *expression)
1946 {
1947         type_t *type = skip_typeref(expression->compound->base.type);
1948         if (is_type_pointer(type)) {
1949                 type = type->pointer.points_to;
1950         }
1951         (void) get_ir_type(type);
1952 }
1953
1954 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1955                                               ir_node *value, ir_node *addr)
1956 {
1957         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1958         type_t   *type = skip_typeref(expression->base.type);
1959
1960         if (!is_type_compound(type)) {
1961                 ir_mode  *mode = get_ir_mode_storage(type);
1962                 value          = create_conv(dbgi, value, mode);
1963                 value          = do_strict_conv(dbgi, value);
1964         }
1965
1966         if (expression->kind == EXPR_REFERENCE) {
1967                 const reference_expression_t *ref = &expression->reference;
1968
1969                 entity_t *entity = ref->entity;
1970                 assert(is_declaration(entity));
1971                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1972                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1973                         set_value(entity->variable.v.value_number, value);
1974                         return value;
1975                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1976                         set_value(entity->parameter.v.value_number, value);
1977                         return value;
1978                 }
1979         }
1980
1981         if (addr == NULL)
1982                 addr = expression_to_addr(expression);
1983         assert(addr != NULL);
1984
1985         if (expression->kind == EXPR_SELECT) {
1986                 const select_expression_t *select = &expression->select;
1987
1988                 construct_select_compound(select);
1989
1990                 entity_t *entity = select->compound_entry;
1991                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1992                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1993                         ir_entity *irentity = entity->compound_member.entity;
1994                         bool       set_volatile
1995                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1996                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
1997                                                        set_volatile);
1998                         return value;
1999                 }
2000         }
2001
2002         assign_value(dbgi, addr, type, value);
2003         return value;
2004 }
2005
2006 static void set_value_for_expression(const expression_t *expression,
2007                                      ir_node *value)
2008 {
2009         set_value_for_expression_addr(expression, value, NULL);
2010 }
2011
2012 static ir_node *get_value_from_lvalue(const expression_t *expression,
2013                                       ir_node *addr)
2014 {
2015         if (expression->kind == EXPR_REFERENCE) {
2016                 const reference_expression_t *ref = &expression->reference;
2017
2018                 entity_t *entity = ref->entity;
2019                 assert(entity->kind == ENTITY_VARIABLE
2020                                 || entity->kind == ENTITY_PARAMETER);
2021                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2022                 int value_number;
2023                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2024                         value_number = entity->variable.v.value_number;
2025                         assert(addr == NULL);
2026                         type_t  *type = skip_typeref(expression->base.type);
2027                         ir_mode *mode = get_ir_mode_storage(type);
2028                         ir_node *res  = get_value(value_number, mode);
2029                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2030                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2031                         value_number = entity->parameter.v.value_number;
2032                         assert(addr == NULL);
2033                         type_t  *type = skip_typeref(expression->base.type);
2034                         ir_mode *mode = get_ir_mode_storage(type);
2035                         ir_node *res  = get_value(value_number, mode);
2036                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2037                 }
2038         }
2039
2040         assert(addr != NULL);
2041         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2042
2043         ir_node *value;
2044         if (expression->kind == EXPR_SELECT &&
2045             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2046             construct_select_compound(&expression->select);
2047                 value = bitfield_extract_to_firm(&expression->select, addr);
2048         } else {
2049                 value = deref_address(dbgi, expression->base.type, addr);
2050         }
2051
2052         return value;
2053 }
2054
2055
2056 static ir_node *create_incdec(const unary_expression_t *expression)
2057 {
2058         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2059         const expression_t *value_expr = expression->value;
2060         ir_node            *addr       = expression_to_addr(value_expr);
2061         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2062
2063         type_t  *type = skip_typeref(expression->base.type);
2064         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2065
2066         ir_node *offset;
2067         if (is_type_pointer(type)) {
2068                 pointer_type_t *pointer_type = &type->pointer;
2069                 offset                       = get_type_size(pointer_type->points_to);
2070         } else {
2071                 assert(is_type_arithmetic(type));
2072                 offset = new_Const(get_mode_one(mode));
2073         }
2074
2075         ir_node *result;
2076         ir_node *store_value;
2077         switch(expression->base.kind) {
2078         case EXPR_UNARY_POSTFIX_INCREMENT:
2079                 result      = value;
2080                 store_value = new_d_Add(dbgi, value, offset, mode);
2081                 break;
2082         case EXPR_UNARY_POSTFIX_DECREMENT:
2083                 result      = value;
2084                 store_value = new_d_Sub(dbgi, value, offset, mode);
2085                 break;
2086         case EXPR_UNARY_PREFIX_INCREMENT:
2087                 result      = new_d_Add(dbgi, value, offset, mode);
2088                 store_value = result;
2089                 break;
2090         case EXPR_UNARY_PREFIX_DECREMENT:
2091                 result      = new_d_Sub(dbgi, value, offset, mode);
2092                 store_value = result;
2093                 break;
2094         default:
2095                 panic("no incdec expr in create_incdec");
2096         }
2097
2098         set_value_for_expression_addr(value_expr, store_value, addr);
2099
2100         return result;
2101 }
2102
2103 static bool is_local_variable(expression_t *expression)
2104 {
2105         if (expression->kind != EXPR_REFERENCE)
2106                 return false;
2107         reference_expression_t *ref_expr = &expression->reference;
2108         entity_t               *entity   = ref_expr->entity;
2109         if (entity->kind != ENTITY_VARIABLE)
2110                 return false;
2111         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2112         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2113 }
2114
2115 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2116 {
2117         switch(kind) {
2118         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2119         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2120         case EXPR_BINARY_NOTEQUAL:
2121                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2122         case EXPR_BINARY_ISLESS:
2123         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2124         case EXPR_BINARY_ISLESSEQUAL:
2125         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2126         case EXPR_BINARY_ISGREATER:
2127         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2128         case EXPR_BINARY_ISGREATEREQUAL:
2129         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2130         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2131
2132         default:
2133                 break;
2134         }
2135         panic("trying to get pn_Cmp from non-comparison binexpr type");
2136 }
2137
2138 /**
2139  * Handle the assume optimizer hint: check if a Confirm
2140  * node can be created.
2141  *
2142  * @param dbi    debug info
2143  * @param expr   the IL assume expression
2144  *
2145  * we support here only some simple cases:
2146  *  - var rel const
2147  *  - const rel val
2148  *  - var rel var
2149  */
2150 static ir_node *handle_assume_compare(dbg_info *dbi,
2151                                       const binary_expression_t *expression)
2152 {
2153         expression_t *op1 = expression->left;
2154         expression_t *op2 = expression->right;
2155         entity_t     *var2, *var = NULL;
2156         ir_node      *res = NULL;
2157         pn_Cmp        cmp_val;
2158
2159         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2160
2161         if (is_local_variable(op1) && is_local_variable(op2)) {
2162         var  = op1->reference.entity;
2163             var2 = op2->reference.entity;
2164
2165                 type_t  *const type = skip_typeref(var->declaration.type);
2166                 ir_mode *const mode = get_ir_mode_storage(type);
2167
2168                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2169                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2170
2171                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2172                 set_value(var2->variable.v.value_number, res);
2173
2174                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2175                 set_value(var->variable.v.value_number, res);
2176
2177                 return res;
2178         }
2179
2180         expression_t *con;
2181         if (is_local_variable(op1) && is_constant_expression(op2)) {
2182                 var = op1->reference.entity;
2183                 con = op2;
2184         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2185                 cmp_val = get_inversed_pnc(cmp_val);
2186                 var = op2->reference.entity;
2187                 con = op1;
2188         }
2189
2190         if (var != NULL) {
2191                 type_t  *const type = skip_typeref(var->declaration.type);
2192                 ir_mode *const mode = get_ir_mode_storage(type);
2193
2194                 res = get_value(var->variable.v.value_number, mode);
2195                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2196                 set_value(var->variable.v.value_number, res);
2197         }
2198         return res;
2199 }
2200
2201 /**
2202  * Handle the assume optimizer hint.
2203  *
2204  * @param dbi    debug info
2205  * @param expr   the IL assume expression
2206  */
2207 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2208         switch(expression->kind) {
2209         case EXPR_BINARY_EQUAL:
2210         case EXPR_BINARY_NOTEQUAL:
2211         case EXPR_BINARY_LESS:
2212         case EXPR_BINARY_LESSEQUAL:
2213         case EXPR_BINARY_GREATER:
2214         case EXPR_BINARY_GREATEREQUAL:
2215                 return handle_assume_compare(dbi, &expression->binary);
2216         default:
2217                 return NULL;
2218         }
2219 }
2220
2221 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2222 {
2223         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2224         type_t   *type = skip_typeref(expression->base.type);
2225
2226         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2227                 return expression_to_addr(expression->value);
2228
2229         const expression_t *value = expression->value;
2230
2231         switch(expression->base.kind) {
2232         case EXPR_UNARY_NEGATE: {
2233                 ir_node *value_node = expression_to_firm(value);
2234                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2235                 return new_d_Minus(dbgi, value_node, mode);
2236         }
2237         case EXPR_UNARY_PLUS:
2238                 return expression_to_firm(value);
2239         case EXPR_UNARY_BITWISE_NEGATE: {
2240                 ir_node *value_node = expression_to_firm(value);
2241                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2242                 return new_d_Not(dbgi, value_node, mode);
2243         }
2244         case EXPR_UNARY_NOT: {
2245                 ir_node *value_node = _expression_to_firm(value);
2246                 value_node          = create_conv(dbgi, value_node, mode_b);
2247                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2248                 return res;
2249         }
2250         case EXPR_UNARY_DEREFERENCE: {
2251                 ir_node *value_node = expression_to_firm(value);
2252                 type_t  *value_type = skip_typeref(value->base.type);
2253                 assert(is_type_pointer(value_type));
2254                 type_t  *points_to  = value_type->pointer.points_to;
2255                 return deref_address(dbgi, points_to, value_node);
2256         }
2257         case EXPR_UNARY_POSTFIX_INCREMENT:
2258         case EXPR_UNARY_POSTFIX_DECREMENT:
2259         case EXPR_UNARY_PREFIX_INCREMENT:
2260         case EXPR_UNARY_PREFIX_DECREMENT:
2261                 return create_incdec(expression);
2262         case EXPR_UNARY_CAST: {
2263                 ir_node *value_node = expression_to_firm(value);
2264                 if (is_type_scalar(type)) {
2265                         ir_mode *mode       = get_ir_mode_storage(type);
2266                         ir_node *node       = create_conv(dbgi, value_node, mode);
2267                         node                = do_strict_conv(dbgi, node);
2268                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2269                         node                = create_conv(dbgi, node, mode_arith);
2270                         return node;
2271                 } else {
2272                         /* make sure firm type is constructed */
2273                         (void) get_ir_type(type);
2274                         return value_node;
2275                 }
2276         }
2277         case EXPR_UNARY_CAST_IMPLICIT: {
2278                 ir_node *value_node = expression_to_firm(value);
2279                 if (is_type_scalar(type)) {
2280                         ir_mode *mode       = get_ir_mode_storage(type);
2281                         ir_node *res        = create_conv(dbgi, value_node, mode);
2282                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2283                         res                 = create_conv(dbgi, res, mode_arith);
2284                         return res;
2285                 } else {
2286                         return value_node;
2287                 }
2288         }
2289         case EXPR_UNARY_ASSUME:
2290                 if (firm_opt.confirm)
2291                         return handle_assume(dbgi, value);
2292                 else
2293                         return NULL;
2294
2295         default:
2296                 break;
2297         }
2298         panic("invalid UNEXPR type found");
2299 }
2300
2301 /**
2302  * produces a 0/1 depending of the value of a mode_b node
2303  */
2304 static ir_node *produce_condition_result(const expression_t *expression,
2305                                          ir_mode *mode, dbg_info *dbgi)
2306 {
2307         ir_node *cur_block = get_cur_block();
2308
2309         ir_node *one_block = new_immBlock();
2310         set_cur_block(one_block);
2311         ir_node *one       = new_Const(get_mode_one(mode));
2312         ir_node *jmp_one   = new_d_Jmp(dbgi);
2313
2314         ir_node *zero_block = new_immBlock();
2315         set_cur_block(zero_block);
2316         ir_node *zero       = new_Const(get_mode_null(mode));
2317         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2318
2319         set_cur_block(cur_block);
2320         create_condition_evaluation(expression, one_block, zero_block);
2321         mature_immBlock(one_block);
2322         mature_immBlock(zero_block);
2323
2324         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2325         new_Block(2, in_cf);
2326
2327         ir_node *in[2] = { one, zero };
2328         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2329
2330         return val;
2331 }
2332
2333 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2334                 ir_node *value, type_t *type)
2335 {
2336         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2337         assert(is_type_pointer(type));
2338         pointer_type_t *const pointer_type = &type->pointer;
2339         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2340         unsigned              elem_size    = get_type_size_const(points_to);
2341
2342         value = create_conv(dbgi, value, mode);
2343
2344         /* gcc extension: allow arithmetic with void * and function * */
2345         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2346             is_type_function(points_to))  {
2347                 elem_size = 1;
2348         }
2349
2350         assert(elem_size >= 1);
2351         if (elem_size == 1)
2352                 return value;
2353
2354         ir_node *const cnst = new_Const_long(mode, (long)elem_size);
2355         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode);
2356         return mul;
2357 }
2358
2359 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2360                           ir_node *left, ir_node *right)
2361 {
2362         ir_mode  *mode;
2363         type_t   *type_left  = skip_typeref(expression->left->base.type);
2364         type_t   *type_right = skip_typeref(expression->right->base.type);
2365
2366         expression_kind_t kind = expression->base.kind;
2367
2368         switch (kind) {
2369         case EXPR_BINARY_SHIFTLEFT:
2370         case EXPR_BINARY_SHIFTRIGHT:
2371         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2372         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2373                 mode  = get_irn_mode(left);
2374                 right = create_conv(dbgi, right, mode_uint);
2375                 break;
2376
2377         case EXPR_BINARY_SUB:
2378                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2379                         const pointer_type_t *const ptr_type = &type_left->pointer;
2380
2381                         mode = get_ir_mode_arithmetic(expression->base.type);
2382                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2383                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2384                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2385                         ir_node *const no_mem    = new_NoMem();
2386                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2387                                                                                                    mode, op_pin_state_floats);
2388                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2389                 }
2390                 /* fallthrough */
2391         case EXPR_BINARY_SUB_ASSIGN:
2392                 if (is_type_pointer(type_left)) {
2393                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2394                         mode  = get_ir_mode_arithmetic(type_left);
2395                         break;
2396                 }
2397                 goto normal_node;
2398
2399         case EXPR_BINARY_ADD:
2400         case EXPR_BINARY_ADD_ASSIGN:
2401                 if (is_type_pointer(type_left)) {
2402                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2403                         mode  = get_ir_mode_arithmetic(type_left);
2404                         break;
2405                 } else if (is_type_pointer(type_right)) {
2406                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2407                         mode  = get_ir_mode_arithmetic(type_right);
2408                         break;
2409                 }
2410                 goto normal_node;
2411
2412         default:
2413 normal_node:
2414                 mode = get_ir_mode_arithmetic(type_right);
2415                 left = create_conv(dbgi, left, mode);
2416                 break;
2417         }
2418
2419         switch (kind) {
2420         case EXPR_BINARY_ADD_ASSIGN:
2421         case EXPR_BINARY_ADD:
2422                 return new_d_Add(dbgi, left, right, mode);
2423         case EXPR_BINARY_SUB_ASSIGN:
2424         case EXPR_BINARY_SUB:
2425                 return new_d_Sub(dbgi, left, right, mode);
2426         case EXPR_BINARY_MUL_ASSIGN:
2427         case EXPR_BINARY_MUL:
2428                 return new_d_Mul(dbgi, left, right, mode);
2429         case EXPR_BINARY_BITWISE_AND:
2430         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2431                 return new_d_And(dbgi, left, right, mode);
2432         case EXPR_BINARY_BITWISE_OR:
2433         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2434                 return new_d_Or(dbgi, left, right, mode);
2435         case EXPR_BINARY_BITWISE_XOR:
2436         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2437                 return new_d_Eor(dbgi, left, right, mode);
2438         case EXPR_BINARY_SHIFTLEFT:
2439         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2440                 return new_d_Shl(dbgi, left, right, mode);
2441         case EXPR_BINARY_SHIFTRIGHT:
2442         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2443                 if (mode_is_signed(mode)) {
2444                         return new_d_Shrs(dbgi, left, right, mode);
2445                 } else {
2446                         return new_d_Shr(dbgi, left, right, mode);
2447                 }
2448         case EXPR_BINARY_DIV:
2449         case EXPR_BINARY_DIV_ASSIGN: {
2450                 ir_node *pin = new_Pin(new_NoMem());
2451                 ir_node *op;
2452                 ir_node *res;
2453                 if (mode_is_float(mode)) {
2454                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2455                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2456                 } else {
2457                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2458                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2459                 }
2460                 return res;
2461         }
2462         case EXPR_BINARY_MOD:
2463         case EXPR_BINARY_MOD_ASSIGN: {
2464                 ir_node *pin = new_Pin(new_NoMem());
2465                 assert(!mode_is_float(mode));
2466                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2467                                          op_pin_state_floats);
2468                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2469                 return res;
2470         }
2471         default:
2472                 panic("unexpected expression kind");
2473         }
2474 }
2475
2476 static ir_node *create_lazy_op(const binary_expression_t *expression)
2477 {
2478         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2479         type_t   *type = skip_typeref(expression->base.type);
2480         ir_mode  *mode = get_ir_mode_arithmetic(type);
2481
2482         if (is_constant_expression(expression->left)) {
2483                 long val = fold_constant(expression->left);
2484                 expression_kind_t ekind = expression->base.kind;
2485                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2486                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2487                         if (val == 0) {
2488                                 return new_Const(get_mode_null(mode));
2489                         }
2490                 } else {
2491                         if (val != 0) {
2492                                 return new_Const(get_mode_one(mode));
2493                         }
2494                 }
2495
2496                 if (is_constant_expression(expression->right)) {
2497                         long const valr = fold_constant(expression->right);
2498                         return valr != 0 ?
2499                                 new_Const(get_mode_one(mode)) :
2500                                 new_Const(get_mode_null(mode));
2501                 }
2502
2503                 return produce_condition_result(expression->right, mode, dbgi);
2504         }
2505
2506         return produce_condition_result((const expression_t*) expression, mode,
2507                                         dbgi);
2508 }
2509
2510 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2511                                             ir_node *right, ir_mode *mode);
2512
2513 static ir_node *create_assign_binop(const binary_expression_t *expression)
2514 {
2515         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2516         const expression_t *left_expr = expression->left;
2517         type_t             *type      = skip_typeref(left_expr->base.type);
2518         ir_mode            *left_mode = get_ir_mode_storage(type);
2519         ir_node            *right     = expression_to_firm(expression->right);
2520         ir_node            *left_addr = expression_to_addr(left_expr);
2521         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2522         ir_node            *result    = create_op(dbgi, expression, left, right);
2523
2524         result = create_conv(dbgi, result, left_mode);
2525         result = do_strict_conv(dbgi, result);
2526
2527         result = set_value_for_expression_addr(left_expr, result, left_addr);
2528
2529         if (!is_type_compound(type)) {
2530                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2531                 result = create_conv(dbgi, result, mode_arithmetic);
2532         }
2533         return result;
2534 }
2535
2536 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2537 {
2538         expression_kind_t kind = expression->base.kind;
2539
2540         switch(kind) {
2541         case EXPR_BINARY_EQUAL:
2542         case EXPR_BINARY_NOTEQUAL:
2543         case EXPR_BINARY_LESS:
2544         case EXPR_BINARY_LESSEQUAL:
2545         case EXPR_BINARY_GREATER:
2546         case EXPR_BINARY_GREATEREQUAL:
2547         case EXPR_BINARY_ISGREATER:
2548         case EXPR_BINARY_ISGREATEREQUAL:
2549         case EXPR_BINARY_ISLESS:
2550         case EXPR_BINARY_ISLESSEQUAL:
2551         case EXPR_BINARY_ISLESSGREATER:
2552         case EXPR_BINARY_ISUNORDERED: {
2553                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2554                 ir_node *left  = expression_to_firm(expression->left);
2555                 ir_node *right = expression_to_firm(expression->right);
2556                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2557                 long     pnc   = get_pnc(kind, expression->left->base.type);
2558                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2559                 return proj;
2560         }
2561         case EXPR_BINARY_ASSIGN: {
2562                 ir_node *addr  = expression_to_addr(expression->left);
2563                 ir_node *right = expression_to_firm(expression->right);
2564                 ir_node *res
2565                         = set_value_for_expression_addr(expression->left, right, addr);
2566
2567                 type_t  *type            = skip_typeref(expression->base.type);
2568                 if (!is_type_compound(type)) {
2569                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2570                         res                      = create_conv(NULL, res, mode_arithmetic);
2571                 }
2572                 return res;
2573         }
2574         case EXPR_BINARY_ADD:
2575         case EXPR_BINARY_SUB:
2576         case EXPR_BINARY_MUL:
2577         case EXPR_BINARY_DIV:
2578         case EXPR_BINARY_MOD:
2579         case EXPR_BINARY_BITWISE_AND:
2580         case EXPR_BINARY_BITWISE_OR:
2581         case EXPR_BINARY_BITWISE_XOR:
2582         case EXPR_BINARY_SHIFTLEFT:
2583         case EXPR_BINARY_SHIFTRIGHT:
2584         {
2585                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2586                 ir_node  *left  = expression_to_firm(expression->left);
2587                 ir_node  *right = expression_to_firm(expression->right);
2588                 return create_op(dbgi, expression, left, right);
2589         }
2590         case EXPR_BINARY_LOGICAL_AND:
2591         case EXPR_BINARY_LOGICAL_OR:
2592                 return create_lazy_op(expression);
2593         case EXPR_BINARY_COMMA:
2594                 /* create side effects of left side */
2595                 (void) expression_to_firm(expression->left);
2596                 return _expression_to_firm(expression->right);
2597
2598         case EXPR_BINARY_ADD_ASSIGN:
2599         case EXPR_BINARY_SUB_ASSIGN:
2600         case EXPR_BINARY_MUL_ASSIGN:
2601         case EXPR_BINARY_MOD_ASSIGN:
2602         case EXPR_BINARY_DIV_ASSIGN:
2603         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2604         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2605         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2606         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2607         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2608                 return create_assign_binop(expression);
2609         default:
2610                 panic("TODO binexpr type");
2611         }
2612 }
2613
2614 static ir_node *array_access_addr(const array_access_expression_t *expression)
2615 {
2616         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2617         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2618         ir_node  *offset      = expression_to_firm(expression->index);
2619         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2620         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2621         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2622
2623         return result;
2624 }
2625
2626 static ir_node *array_access_to_firm(
2627                 const array_access_expression_t *expression)
2628 {
2629         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2630         ir_node  *addr   = array_access_addr(expression);
2631         type_t   *type   = revert_automatic_type_conversion(
2632                         (const expression_t*) expression);
2633         type             = skip_typeref(type);
2634
2635         return deref_address(dbgi, type, addr);
2636 }
2637
2638 static long get_offsetof_offset(const offsetof_expression_t *expression)
2639 {
2640         type_t *orig_type = expression->type;
2641         long    offset    = 0;
2642
2643         designator_t *designator = expression->designator;
2644         for ( ; designator != NULL; designator = designator->next) {
2645                 type_t *type = skip_typeref(orig_type);
2646                 /* be sure the type is constructed */
2647                 (void) get_ir_type(type);
2648
2649                 if (designator->symbol != NULL) {
2650                         assert(is_type_compound(type));
2651                         symbol_t *symbol = designator->symbol;
2652
2653                         compound_t *compound = type->compound.compound;
2654                         entity_t   *iter     = compound->members.entities;
2655                         for ( ; iter != NULL; iter = iter->base.next) {
2656                                 if (iter->base.symbol == symbol) {
2657                                         break;
2658                                 }
2659                         }
2660                         assert(iter != NULL);
2661
2662                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2663                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2664                         offset += get_entity_offset(iter->compound_member.entity);
2665
2666                         orig_type = iter->declaration.type;
2667                 } else {
2668                         expression_t *array_index = designator->array_index;
2669                         assert(designator->array_index != NULL);
2670                         assert(is_type_array(type));
2671
2672                         long index         = fold_constant(array_index);
2673                         ir_type *arr_type  = get_ir_type(type);
2674                         ir_type *elem_type = get_array_element_type(arr_type);
2675                         long     elem_size = get_type_size_bytes(elem_type);
2676
2677                         offset += index * elem_size;
2678
2679                         orig_type = type->array.element_type;
2680                 }
2681         }
2682
2683         return offset;
2684 }
2685
2686 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2687 {
2688         ir_mode  *mode   = get_ir_mode_arithmetic(expression->base.type);
2689         long      offset = get_offsetof_offset(expression);
2690         tarval   *tv     = new_tarval_from_long(offset, mode);
2691         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2692
2693         return new_d_Const(dbgi, tv);
2694 }
2695
2696 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2697                                      ir_entity *entity, type_t *type);
2698
2699 static ir_node *compound_literal_to_firm(
2700                 const compound_literal_expression_t *expression)
2701 {
2702         type_t *type = expression->type;
2703
2704         /* create an entity on the stack */
2705         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2706
2707         ident     *const id     = id_unique("CompLit.%u");
2708         ir_type   *const irtype = get_ir_type(type);
2709         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2710         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2711         set_entity_ld_ident(entity, id);
2712
2713         set_entity_variability(entity, variability_uninitialized);
2714
2715         /* create initialisation code */
2716         initializer_t *initializer = expression->initializer;
2717         create_local_initializer(initializer, dbgi, entity, type);
2718
2719         /* create a sel for the compound literal address */
2720         ir_node *frame = get_local_frame(entity);
2721         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2722         return sel;
2723 }
2724
2725 /**
2726  * Transform a sizeof expression into Firm code.
2727  */
2728 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2729 {
2730         type_t *type = expression->type;
2731         if (type == NULL) {
2732                 type = expression->tp_expression->base.type;
2733                 assert(type != NULL);
2734         }
2735
2736         type = skip_typeref(type);
2737         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2738         if (is_type_array(type) && type->array.is_vla
2739                         && expression->tp_expression != NULL) {
2740                 expression_to_firm(expression->tp_expression);
2741         }
2742
2743         return get_type_size(type);
2744 }
2745
2746 /**
2747  * Transform an alignof expression into Firm code.
2748  */
2749 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2750 {
2751         type_t *type = expression->type;
2752         if (type == NULL) {
2753                 /* beware: if expression is a variable reference, return the
2754                    alignment of the variable. */
2755                 const expression_t *tp_expression = expression->tp_expression;
2756                 const entity_t     *entity        = expression_is_variable(tp_expression);
2757                 if (entity != NULL) {
2758                         /* TODO: get the alignment of this variable. */
2759                         (void) entity;
2760                 }
2761                 type = tp_expression->base.type;
2762                 assert(type != NULL);
2763         }
2764
2765         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2766         symconst_symbol sym;
2767         sym.type_p = get_ir_type(type);
2768         return new_SymConst(mode, sym, symconst_type_align);
2769 }
2770
2771 static void init_ir_types(void);
2772
2773 long fold_constant(const expression_t *expression)
2774 {
2775         assert(is_type_valid(skip_typeref(expression->base.type)));
2776
2777         bool constant_folding_old = constant_folding;
2778         constant_folding = true;
2779
2780         init_ir_types();
2781
2782         assert(is_constant_expression(expression));
2783
2784         ir_graph *old_current_ir_graph = current_ir_graph;
2785         if (current_ir_graph == NULL) {
2786                 current_ir_graph = get_const_code_irg();
2787         }
2788
2789         ir_node *cnst = expression_to_firm(expression);
2790         current_ir_graph = old_current_ir_graph;
2791
2792         if (!is_Const(cnst)) {
2793                 panic("couldn't fold constant");
2794         }
2795
2796         tarval *tv = get_Const_tarval(cnst);
2797         if (!tarval_is_long(tv)) {
2798                 panic("result of constant folding is not integer");
2799         }
2800
2801         constant_folding = constant_folding_old;
2802
2803         return get_tarval_long(tv);
2804 }
2805
2806 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2807 {
2808         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2809
2810         /* first try to fold a constant condition */
2811         if (is_constant_expression(expression->condition)) {
2812                 long val = fold_constant(expression->condition);
2813                 if (val) {
2814                         expression_t *true_expression = expression->true_expression;
2815                         if (true_expression == NULL)
2816                                 true_expression = expression->condition;
2817                         return expression_to_firm(true_expression);
2818                 } else {
2819                         return expression_to_firm(expression->false_expression);
2820                 }
2821         }
2822
2823         ir_node *cur_block   = get_cur_block();
2824
2825         /* create the true block */
2826         ir_node *true_block  = new_immBlock();
2827         set_cur_block(true_block);
2828
2829         ir_node *true_val = expression->true_expression != NULL ?
2830                 expression_to_firm(expression->true_expression) : NULL;
2831         ir_node *true_jmp = new_Jmp();
2832
2833         /* create the false block */
2834         ir_node *false_block = new_immBlock();
2835         set_cur_block(false_block);
2836
2837         ir_node *false_val = expression_to_firm(expression->false_expression);
2838         ir_node *false_jmp = new_Jmp();
2839
2840         /* create the condition evaluation */
2841         set_cur_block(cur_block);
2842         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2843         if (expression->true_expression == NULL) {
2844                 if (cond_expr != NULL) {
2845                         true_val = cond_expr;
2846                 } else {
2847                         /* Condition ended with a short circuit (&&, ||, !) operation.
2848                          * Generate a "1" as value for the true branch. */
2849                         true_val = new_Const(get_mode_one(mode_Is));
2850                 }
2851         }
2852         mature_immBlock(true_block);
2853         mature_immBlock(false_block);
2854
2855         /* create the common block */
2856         ir_node *in_cf[2] = { true_jmp, false_jmp };
2857         new_Block(2, in_cf);
2858
2859         /* TODO improve static semantics, so either both or no values are NULL */
2860         if (true_val == NULL || false_val == NULL)
2861                 return NULL;
2862
2863         ir_node *in[2] = { true_val, false_val };
2864         ir_mode *mode  = get_irn_mode(true_val);
2865         assert(get_irn_mode(false_val) == mode);
2866         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2867
2868         return val;
2869 }
2870
2871 /**
2872  * Returns an IR-node representing the address of a field.
2873  */
2874 static ir_node *select_addr(const select_expression_t *expression)
2875 {
2876         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2877
2878         construct_select_compound(expression);
2879
2880         ir_node *compound_addr = expression_to_firm(expression->compound);
2881
2882         entity_t *entry = expression->compound_entry;
2883         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2884         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2885
2886         if (constant_folding) {
2887                 ir_mode *mode = get_irn_mode(compound_addr);
2888                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2889                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
2890                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2891         } else {
2892                 ir_entity *irentity = entry->compound_member.entity;
2893                 assert(irentity != NULL);
2894                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2895         }
2896 }
2897
2898 static ir_node *select_to_firm(const select_expression_t *expression)
2899 {
2900         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2901         ir_node  *addr = select_addr(expression);
2902         type_t   *type = revert_automatic_type_conversion(
2903                         (const expression_t*) expression);
2904         type           = skip_typeref(type);
2905
2906         entity_t *entry      = expression->compound_entry;
2907         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2908         type_t   *entry_type = skip_typeref(entry->declaration.type);
2909
2910         if (entry_type->kind == TYPE_BITFIELD) {
2911                 return bitfield_extract_to_firm(expression, addr);
2912         }
2913
2914         return deref_address(dbgi, type, addr);
2915 }
2916
2917 /* Values returned by __builtin_classify_type. */
2918 typedef enum gcc_type_class
2919 {
2920         no_type_class = -1,
2921         void_type_class,
2922         integer_type_class,
2923         char_type_class,
2924         enumeral_type_class,
2925         boolean_type_class,
2926         pointer_type_class,
2927         reference_type_class,
2928         offset_type_class,
2929         real_type_class,
2930         complex_type_class,
2931         function_type_class,
2932         method_type_class,
2933         record_type_class,
2934         union_type_class,
2935         array_type_class,
2936         string_type_class,
2937         set_type_class,
2938         file_type_class,
2939         lang_type_class
2940 } gcc_type_class;
2941
2942 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2943 {
2944         type_t *type = expr->type_expression->base.type;
2945
2946         /* FIXME gcc returns different values depending on whether compiling C or C++
2947          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2948         gcc_type_class tc;
2949         for (;;) {
2950                 type = skip_typeref(type);
2951                 switch (type->kind) {
2952                         case TYPE_ATOMIC: {
2953                                 const atomic_type_t *const atomic_type = &type->atomic;
2954                                 switch (atomic_type->akind) {
2955                                         /* should not be reached */
2956                                         case ATOMIC_TYPE_INVALID:
2957                                                 tc = no_type_class;
2958                                                 goto make_const;
2959
2960                                         /* gcc cannot do that */
2961                                         case ATOMIC_TYPE_VOID:
2962                                                 tc = void_type_class;
2963                                                 goto make_const;
2964
2965                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
2966                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2967                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2968                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2969                                         case ATOMIC_TYPE_SHORT:
2970                                         case ATOMIC_TYPE_USHORT:
2971                                         case ATOMIC_TYPE_INT:
2972                                         case ATOMIC_TYPE_UINT:
2973                                         case ATOMIC_TYPE_LONG:
2974                                         case ATOMIC_TYPE_ULONG:
2975                                         case ATOMIC_TYPE_LONGLONG:
2976                                         case ATOMIC_TYPE_ULONGLONG:
2977                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2978                                                 tc = integer_type_class;
2979                                                 goto make_const;
2980
2981                                         case ATOMIC_TYPE_FLOAT:
2982                                         case ATOMIC_TYPE_DOUBLE:
2983                                         case ATOMIC_TYPE_LONG_DOUBLE:
2984                                                 tc = real_type_class;
2985                                                 goto make_const;
2986                                 }
2987                                 panic("Unexpected atomic type in classify_type_to_firm().");
2988                         }
2989
2990                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2991                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2992                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2993                         case TYPE_ARRAY:           /* gcc handles this as pointer */
2994                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
2995                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2996                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2997                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2998
2999                         /* gcc handles this as integer */
3000                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3001
3002                         /* gcc classifies the referenced type */
3003                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3004
3005                         case TYPE_BUILTIN:
3006                         /* typedef/typeof should be skipped already */
3007                         case TYPE_TYPEDEF:
3008                         case TYPE_TYPEOF:
3009                         case TYPE_INVALID:
3010                         case TYPE_ERROR:
3011                                 break;
3012                 }
3013                 panic("unexpected TYPE classify_type_to_firm().");
3014         }
3015
3016 make_const:;
3017         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3018         tarval   *const tv   = new_tarval_from_long(tc, mode_int);
3019         return new_d_Const(dbgi, tv);
3020 }
3021
3022 static ir_node *function_name_to_firm(
3023                 const funcname_expression_t *const expr)
3024 {
3025         switch(expr->kind) {
3026         case FUNCNAME_FUNCTION:
3027         case FUNCNAME_PRETTY_FUNCTION:
3028         case FUNCNAME_FUNCDNAME:
3029                 if (current_function_name == NULL) {
3030                         const source_position_t *const src_pos = &expr->base.source_position;
3031                         const char    *name  = current_function_entity->base.symbol->string;
3032                         const string_t string = { name, strlen(name) + 1 };
3033                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3034                 }
3035                 return current_function_name;
3036         case FUNCNAME_FUNCSIG:
3037                 if (current_funcsig == NULL) {
3038                         const source_position_t *const src_pos = &expr->base.source_position;
3039                         ir_entity *ent = get_irg_entity(current_ir_graph);
3040                         const char *const name = get_entity_ld_name(ent);
3041                         const string_t string = { name, strlen(name) + 1 };
3042                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3043                 }
3044                 return current_funcsig;
3045         }
3046         panic("Unsupported function name");
3047 }
3048
3049 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3050 {
3051         statement_t *statement = expr->statement;
3052
3053         assert(statement->kind == STATEMENT_COMPOUND);
3054         return compound_statement_to_firm(&statement->compound);
3055 }
3056
3057 static ir_node *va_start_expression_to_firm(
3058         const va_start_expression_t *const expr)
3059 {
3060         type_t    *const type        = current_function_entity->declaration.type;
3061         ir_type   *const method_type = get_ir_type(type);
3062         int        const n           = get_method_n_params(method_type) - 1;
3063         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3064         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
3065         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3066         ir_node   *const no_mem      = new_NoMem();
3067         ir_node   *const arg_sel     =
3068                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3069
3070         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
3071         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3072         set_value_for_expression(expr->ap, add);
3073
3074         return NULL;
3075 }
3076
3077 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3078 {
3079         type_t       *const type    = expr->base.type;
3080         expression_t *const ap_expr = expr->ap;
3081         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3082         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3083         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3084         ir_node      *const res     = deref_address(dbgi, type, ap);
3085
3086         ir_node      *const cnst    = get_type_size(expr->base.type);
3087         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
3088
3089         set_value_for_expression_addr(ap_expr, add, ap_addr);
3090
3091         return res;
3092 }
3093
3094 static ir_node *dereference_addr(const unary_expression_t *const expression)
3095 {
3096         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3097         return expression_to_firm(expression->value);
3098 }
3099
3100 /**
3101  * Returns a IR-node representing an lvalue of the given expression.
3102  */
3103 static ir_node *expression_to_addr(const expression_t *expression)
3104 {
3105         switch(expression->kind) {
3106         case EXPR_ARRAY_ACCESS:
3107                 return array_access_addr(&expression->array_access);
3108         case EXPR_CALL:
3109                 return call_expression_to_firm(&expression->call);
3110         case EXPR_COMPOUND_LITERAL:
3111                 return compound_literal_to_firm(&expression->compound_literal);
3112         case EXPR_REFERENCE:
3113                 return reference_addr(&expression->reference);
3114         case EXPR_SELECT:
3115                 return select_addr(&expression->select);
3116         case EXPR_UNARY_DEREFERENCE:
3117                 return dereference_addr(&expression->unary);
3118         default:
3119                 break;
3120         }
3121         panic("trying to get address of non-lvalue");
3122 }
3123
3124 static ir_node *builtin_constant_to_firm(
3125                 const builtin_constant_expression_t *expression)
3126 {
3127         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3128         long     v;
3129
3130         if (is_constant_expression(expression->value)) {
3131                 v = 1;
3132         } else {
3133                 v = 0;
3134         }
3135         return new_Const_long(mode, v);
3136 }
3137
3138 static ir_node *builtin_prefetch_to_firm(
3139                 const builtin_prefetch_expression_t *expression)
3140 {
3141         ir_node *adr = expression_to_firm(expression->adr);
3142         /* no Firm support for prefetch yet */
3143         (void) adr;
3144         return NULL;
3145 }
3146
3147 static ir_node *get_label_block(label_t *label)
3148 {
3149         if (label->block != NULL)
3150                 return label->block;
3151
3152         /* beware: might be called from create initializer with current_ir_graph
3153          * set to const_code_irg. */
3154         ir_graph *rem    = current_ir_graph;
3155         current_ir_graph = current_function;
3156
3157         ir_node *block = new_immBlock();
3158
3159         label->block = block;
3160
3161         ARR_APP1(label_t *, all_labels, label);
3162
3163         current_ir_graph = rem;
3164         return block;
3165 }
3166
3167 /**
3168  * Pointer to a label.  This is used for the
3169  * GNU address-of-label extension.
3170  */
3171 static ir_node *label_address_to_firm(
3172                 const label_address_expression_t *label)
3173 {
3174         ir_node    *block = get_label_block(label->label);
3175         ir_label_t  nr    = get_Block_label(block);
3176
3177         if (nr == 0) {
3178                 nr = get_irp_next_label_nr();
3179                 set_Block_label(block, nr);
3180         }
3181         symconst_symbol value;
3182         value.label = nr;
3183         return new_SymConst(mode_P_code, value, symconst_label);
3184 }
3185
3186 static ir_node *builtin_symbol_to_firm(
3187                 const builtin_symbol_expression_t *expression)
3188 {
3189         /* for gcc compatibility we have to produce (dummy) addresses for some
3190          * builtins */
3191         if (warning.other) {
3192                 warningf(&expression->base.source_position,
3193                                  "taking address of builtin '%Y'", expression->symbol);
3194         }
3195
3196         /* simply create a NULL pointer */
3197         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
3198         ir_node  *res  = new_Const_long(mode, 0);
3199
3200         return res;
3201 }
3202
3203 /**
3204  * creates firm nodes for an expression. The difference between this function
3205  * and expression_to_firm is, that this version might produce mode_b nodes
3206  * instead of mode_Is.
3207  */
3208 static ir_node *_expression_to_firm(const expression_t *expression)
3209 {
3210 #ifndef NDEBUG
3211         if (!constant_folding) {
3212                 assert(!expression->base.transformed);
3213                 ((expression_t*) expression)->base.transformed = true;
3214         }
3215 #endif
3216
3217         switch (expression->kind) {
3218         case EXPR_CHARACTER_CONSTANT:
3219                 return character_constant_to_firm(&expression->conste);
3220         case EXPR_WIDE_CHARACTER_CONSTANT:
3221                 return wide_character_constant_to_firm(&expression->conste);
3222         case EXPR_CONST:
3223                 return const_to_firm(&expression->conste);
3224         case EXPR_STRING_LITERAL:
3225                 return string_literal_to_firm(&expression->string);
3226         case EXPR_WIDE_STRING_LITERAL:
3227                 return wide_string_literal_to_firm(&expression->wide_string);
3228         case EXPR_REFERENCE:
3229                 return reference_expression_to_firm(&expression->reference);
3230         case EXPR_REFERENCE_ENUM_VALUE:
3231                 return reference_expression_enum_value_to_firm(&expression->reference);
3232         case EXPR_CALL:
3233                 return call_expression_to_firm(&expression->call);
3234         EXPR_UNARY_CASES
3235                 return unary_expression_to_firm(&expression->unary);
3236         EXPR_BINARY_CASES
3237                 return binary_expression_to_firm(&expression->binary);
3238         case EXPR_ARRAY_ACCESS:
3239                 return array_access_to_firm(&expression->array_access);
3240         case EXPR_SIZEOF:
3241                 return sizeof_to_firm(&expression->typeprop);
3242         case EXPR_ALIGNOF:
3243                 return alignof_to_firm(&expression->typeprop);
3244         case EXPR_CONDITIONAL:
3245                 return conditional_to_firm(&expression->conditional);
3246         case EXPR_SELECT:
3247                 return select_to_firm(&expression->select);
3248         case EXPR_CLASSIFY_TYPE:
3249                 return classify_type_to_firm(&expression->classify_type);
3250         case EXPR_FUNCNAME:
3251                 return function_name_to_firm(&expression->funcname);
3252         case EXPR_STATEMENT:
3253                 return statement_expression_to_firm(&expression->statement);
3254         case EXPR_VA_START:
3255                 return va_start_expression_to_firm(&expression->va_starte);
3256         case EXPR_VA_ARG:
3257                 return va_arg_expression_to_firm(&expression->va_arge);
3258         case EXPR_BUILTIN_SYMBOL:
3259                 return builtin_symbol_to_firm(&expression->builtin_symbol);
3260         case EXPR_BUILTIN_CONSTANT_P:
3261                 return builtin_constant_to_firm(&expression->builtin_constant);
3262         case EXPR_BUILTIN_PREFETCH:
3263                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3264         case EXPR_OFFSETOF:
3265                 return offsetof_to_firm(&expression->offsetofe);
3266         case EXPR_COMPOUND_LITERAL:
3267                 return compound_literal_to_firm(&expression->compound_literal);
3268         case EXPR_LABEL_ADDRESS:
3269                 return label_address_to_firm(&expression->label_address);
3270
3271         case EXPR_UNKNOWN:
3272         case EXPR_INVALID:
3273                 break;
3274         }
3275         panic("invalid expression found");
3276 }
3277
3278 static bool is_builtin_expect(const expression_t *expression)
3279 {
3280         if (expression->kind != EXPR_CALL)
3281                 return false;
3282
3283         expression_t *function = expression->call.function;
3284         if (function->kind != EXPR_BUILTIN_SYMBOL)
3285                 return false;
3286         if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3287                 return false;
3288
3289         return true;
3290 }
3291
3292 static bool produces_mode_b(const expression_t *expression)
3293 {
3294         switch (expression->kind) {
3295         case EXPR_BINARY_EQUAL:
3296         case EXPR_BINARY_NOTEQUAL:
3297         case EXPR_BINARY_LESS:
3298         case EXPR_BINARY_LESSEQUAL:
3299         case EXPR_BINARY_GREATER:
3300         case EXPR_BINARY_GREATEREQUAL:
3301         case EXPR_BINARY_ISGREATER:
3302         case EXPR_BINARY_ISGREATEREQUAL:
3303         case EXPR_BINARY_ISLESS:
3304         case EXPR_BINARY_ISLESSEQUAL:
3305         case EXPR_BINARY_ISLESSGREATER:
3306         case EXPR_BINARY_ISUNORDERED:
3307         case EXPR_UNARY_NOT:
3308                 return true;
3309
3310         case EXPR_CALL:
3311                 if (is_builtin_expect(expression)) {
3312                         expression_t *argument = expression->call.arguments->expression;
3313                         return produces_mode_b(argument);
3314                 }
3315                 return false;
3316         case EXPR_BINARY_COMMA:
3317                 return produces_mode_b(expression->binary.right);
3318
3319         default:
3320                 return false;
3321         }
3322 }
3323
3324 static ir_node *expression_to_firm(const expression_t *expression)
3325 {
3326         if (!produces_mode_b(expression)) {
3327                 ir_node *res = _expression_to_firm(expression);
3328                 assert(res == NULL || get_irn_mode(res) != mode_b);
3329                 return res;
3330         }
3331
3332         if (is_constant_expression(expression)) {
3333                 ir_node *res  = _expression_to_firm(expression);
3334                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3335                 assert(is_Const(res));
3336                 if (is_Const_null(res)) {
3337                         return new_Const_long(mode, 0);
3338                 } else {
3339                         return new_Const_long(mode, 1);
3340                 }
3341         }
3342
3343         /* we have to produce a 0/1 from the mode_b expression */
3344         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3345         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3346         return produce_condition_result(expression, mode, dbgi);
3347 }
3348
3349 /**
3350  * create a short-circuit expression evaluation that tries to construct
3351  * efficient control flow structures for &&, || and ! expressions
3352  */
3353 static ir_node *create_condition_evaluation(const expression_t *expression,
3354                                             ir_node *true_block,
3355                                             ir_node *false_block)
3356 {
3357         switch(expression->kind) {
3358         case EXPR_UNARY_NOT: {
3359                 const unary_expression_t *unary_expression = &expression->unary;
3360                 create_condition_evaluation(unary_expression->value, false_block,
3361                                             true_block);
3362                 return NULL;
3363         }
3364         case EXPR_BINARY_LOGICAL_AND: {
3365                 const binary_expression_t *binary_expression = &expression->binary;
3366
3367                 ir_node *extra_block = new_immBlock();
3368                 create_condition_evaluation(binary_expression->left, extra_block,
3369                                             false_block);
3370                 mature_immBlock(extra_block);
3371                 set_cur_block(extra_block);
3372                 create_condition_evaluation(binary_expression->right, true_block,
3373                                             false_block);
3374                 return NULL;
3375         }
3376         case EXPR_BINARY_LOGICAL_OR: {
3377                 const binary_expression_t *binary_expression = &expression->binary;
3378
3379                 ir_node *extra_block = new_immBlock();
3380                 create_condition_evaluation(binary_expression->left, true_block,
3381                                             extra_block);
3382                 mature_immBlock(extra_block);
3383                 set_cur_block(extra_block);
3384                 create_condition_evaluation(binary_expression->right, true_block,
3385                                             false_block);
3386                 return NULL;
3387         }
3388         default:
3389                 break;
3390         }
3391
3392         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3393         ir_node  *cond_expr  = _expression_to_firm(expression);
3394         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3395         ir_node  *cond       = new_d_Cond(dbgi, condition);
3396         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3397         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3398
3399         /* set branch prediction info based on __builtin_expect */
3400         if (is_builtin_expect(expression)) {
3401                 call_argument_t *argument = expression->call.arguments->next;
3402                 if (is_constant_expression(argument->expression)) {
3403                         long               cnst = fold_constant(argument->expression);
3404                         cond_jmp_predicate pred;
3405
3406                         if (cnst == 0) {
3407                                 pred = COND_JMP_PRED_FALSE;
3408                         } else {
3409                                 pred = COND_JMP_PRED_TRUE;
3410                         }
3411                         set_Cond_jmp_pred(cond, pred);
3412                 }
3413         }
3414
3415         add_immBlock_pred(true_block, true_proj);
3416         add_immBlock_pred(false_block, false_proj);
3417
3418         set_cur_block(NULL);
3419         return cond_expr;
3420 }
3421
3422
3423 static void create_variable_entity(entity_t *variable,
3424                                    declaration_kind_t declaration_kind,
3425                                    ir_type *parent_type)
3426 {
3427         assert(variable->kind == ENTITY_VARIABLE);
3428         type_t    *type = skip_typeref(variable->declaration.type);
3429         type            = get_aligned_type(type, variable->variable.alignment);
3430
3431         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3432         ir_type   *const irtype   = get_ir_type(type);
3433         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3434
3435         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3436
3437         handle_gnu_attributes_ent(irentity, variable);
3438
3439         variable->declaration.kind  = (unsigned char) declaration_kind;
3440         variable->variable.v.entity = irentity;
3441         set_entity_variability(irentity, variability_uninitialized);
3442         set_entity_ld_ident(irentity, create_ld_ident(variable));
3443
3444         if (parent_type == get_tls_type())
3445                 set_entity_allocation(irentity, allocation_automatic);
3446         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3447                 set_entity_allocation(irentity, allocation_static);
3448
3449         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3450                 set_entity_volatility(irentity, volatility_is_volatile);
3451         }
3452 }
3453
3454
3455 typedef struct type_path_entry_t type_path_entry_t;
3456 struct type_path_entry_t {
3457         type_t           *type;
3458         ir_initializer_t *initializer;
3459         size_t            index;
3460         entity_t         *compound_entry;
3461 };
3462
3463 typedef struct type_path_t type_path_t;
3464 struct type_path_t {
3465         type_path_entry_t *path;
3466         type_t            *top_type;
3467         bool               invalid;
3468 };
3469
3470 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3471 {
3472         size_t len = ARR_LEN(path->path);
3473
3474         for (size_t i = 0; i < len; ++i) {
3475                 const type_path_entry_t *entry = & path->path[i];
3476
3477                 type_t *type = skip_typeref(entry->type);
3478                 if (is_type_compound(type)) {
3479                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3480                 } else if (is_type_array(type)) {
3481                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3482                 } else {
3483                         fprintf(stderr, "-INVALID-");
3484                 }
3485         }
3486         fprintf(stderr, "  (");
3487         print_type(path->top_type);
3488         fprintf(stderr, ")");
3489 }
3490
3491 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3492 {
3493         size_t len = ARR_LEN(path->path);
3494         assert(len > 0);
3495         return & path->path[len-1];
3496 }
3497
3498 static type_path_entry_t *append_to_type_path(type_path_t *path)
3499 {
3500         size_t len = ARR_LEN(path->path);
3501         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3502
3503         type_path_entry_t *result = & path->path[len];
3504         memset(result, 0, sizeof(result[0]));
3505         return result;
3506 }
3507
3508 static size_t get_compound_member_count(const compound_type_t *type)
3509 {
3510         compound_t *compound  = type->compound;
3511         size_t      n_members = 0;
3512         entity_t   *member    = compound->members.entities;
3513         for ( ; member != NULL; member = member->base.next) {
3514                 ++n_members;
3515         }
3516
3517         return n_members;
3518 }
3519
3520 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3521 {
3522         type_t *orig_top_type = path->top_type;
3523         type_t *top_type      = skip_typeref(orig_top_type);
3524
3525         assert(is_type_compound(top_type) || is_type_array(top_type));
3526
3527         if (ARR_LEN(path->path) == 0) {
3528                 return NULL;
3529         } else {
3530                 type_path_entry_t *top         = get_type_path_top(path);
3531                 ir_initializer_t  *initializer = top->initializer;
3532                 return get_initializer_compound_value(initializer, top->index);
3533         }
3534 }
3535
3536 static void descend_into_subtype(type_path_t *path)
3537 {
3538         type_t *orig_top_type = path->top_type;
3539         type_t *top_type      = skip_typeref(orig_top_type);
3540
3541         assert(is_type_compound(top_type) || is_type_array(top_type));
3542
3543         ir_initializer_t *initializer = get_initializer_entry(path);
3544
3545         type_path_entry_t *top = append_to_type_path(path);
3546         top->type              = top_type;
3547
3548         size_t len;
3549
3550         if (is_type_compound(top_type)) {
3551                 compound_t *compound = top_type->compound.compound;
3552                 entity_t   *entry    = compound->members.entities;
3553
3554                 top->compound_entry = entry;
3555                 top->index          = 0;
3556                 len                 = get_compound_member_count(&top_type->compound);
3557                 if (entry != NULL) {
3558                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3559                         path->top_type = entry->declaration.type;
3560                 }
3561         } else {
3562                 assert(is_type_array(top_type));
3563                 assert(top_type->array.size > 0);
3564
3565                 top->index     = 0;
3566                 path->top_type = top_type->array.element_type;
3567                 len            = top_type->array.size;
3568         }
3569         if (initializer == NULL
3570                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3571                 initializer = create_initializer_compound(len);
3572                 /* we have to set the entry at the 2nd latest path entry... */
3573                 size_t path_len = ARR_LEN(path->path);
3574                 assert(path_len >= 1);
3575                 if (path_len > 1) {
3576                         type_path_entry_t *entry        = & path->path[path_len-2];
3577                         ir_initializer_t  *tinitializer = entry->initializer;
3578                         set_initializer_compound_value(tinitializer, entry->index,
3579                                                        initializer);
3580                 }
3581         }
3582         top->initializer = initializer;
3583 }
3584
3585 static void ascend_from_subtype(type_path_t *path)
3586 {
3587         type_path_entry_t *top = get_type_path_top(path);
3588
3589         path->top_type = top->type;
3590
3591         size_t len = ARR_LEN(path->path);
3592         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3593 }
3594
3595 static void walk_designator(type_path_t *path, const designator_t *designator)
3596 {
3597         /* designators start at current object type */
3598         ARR_RESIZE(type_path_entry_t, path->path, 1);
3599
3600         for ( ; designator != NULL; designator = designator->next) {
3601                 type_path_entry_t *top         = get_type_path_top(path);
3602                 type_t            *orig_type   = top->type;
3603                 type_t            *type        = skip_typeref(orig_type);
3604
3605                 if (designator->symbol != NULL) {
3606                         assert(is_type_compound(type));
3607                         size_t    index  = 0;
3608                         symbol_t *symbol = designator->symbol;
3609
3610                         compound_t *compound = type->compound.compound;
3611                         entity_t   *iter     = compound->members.entities;
3612                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3613                                 if (iter->base.symbol == symbol) {
3614                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3615                                         break;
3616                                 }
3617                         }
3618                         assert(iter != NULL);
3619
3620                         top->type           = orig_type;
3621                         top->compound_entry = iter;
3622                         top->index          = index;
3623                         orig_type           = iter->declaration.type;
3624                 } else {
3625                         expression_t *array_index = designator->array_index;
3626                         assert(designator->array_index != NULL);
3627                         assert(is_type_array(type));
3628
3629                         long index = fold_constant(array_index);
3630                         assert(index >= 0);
3631 #ifndef NDEBUG
3632                         if (type->array.size_constant) {
3633                                 long array_size = type->array.size;
3634                                 assert(index < array_size);
3635                         }
3636 #endif
3637
3638                         top->type  = orig_type;
3639                         top->index = (size_t) index;
3640                         orig_type  = type->array.element_type;
3641                 }
3642                 path->top_type = orig_type;
3643
3644                 if (designator->next != NULL) {
3645                         descend_into_subtype(path);
3646                 }
3647         }
3648
3649         path->invalid  = false;
3650 }
3651
3652 static void advance_current_object(type_path_t *path)
3653 {
3654         if (path->invalid) {
3655                 /* TODO: handle this... */
3656                 panic("invalid initializer in ast2firm (excessive elements)");
3657         }
3658
3659         type_path_entry_t *top = get_type_path_top(path);
3660
3661         type_t *type = skip_typeref(top->type);
3662         if (is_type_union(type)) {
3663                 top->compound_entry = NULL;
3664         } else if (is_type_struct(type)) {
3665                 entity_t *entry = top->compound_entry;
3666
3667                 top->index++;
3668                 entry               = entry->base.next;
3669                 top->compound_entry = entry;
3670                 if (entry != NULL) {
3671                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3672                         path->top_type = entry->declaration.type;
3673                         return;
3674                 }
3675         } else {
3676                 assert(is_type_array(type));
3677
3678                 top->index++;
3679                 if (!type->array.size_constant || top->index < type->array.size) {
3680                         return;
3681                 }
3682         }
3683
3684         /* we're past the last member of the current sub-aggregate, try if we
3685          * can ascend in the type hierarchy and continue with another subobject */
3686         size_t len = ARR_LEN(path->path);
3687
3688         if (len > 1) {
3689                 ascend_from_subtype(path);
3690                 advance_current_object(path);
3691         } else {
3692                 path->invalid = true;
3693         }
3694 }
3695
3696
3697 static ir_initializer_t *create_ir_initializer(
3698                 const initializer_t *initializer, type_t *type);
3699
3700 static ir_initializer_t *create_ir_initializer_value(
3701                 const initializer_value_t *initializer)
3702 {
3703         if (is_type_compound(initializer->value->base.type)) {
3704                 panic("initializer creation for compounds not implemented yet");
3705         }
3706         ir_node *value = expression_to_firm(initializer->value);
3707         type_t  *type  = initializer->value->base.type;
3708         ir_mode *mode  = get_ir_mode_storage(type);
3709         value          = create_conv(NULL, value, mode);
3710         return create_initializer_const(value);
3711 }
3712
3713 /** test wether type can be initialized by a string constant */
3714 static bool is_string_type(type_t *type)
3715 {
3716         type_t *inner;
3717         if (is_type_pointer(type)) {
3718                 inner = skip_typeref(type->pointer.points_to);
3719         } else if(is_type_array(type)) {
3720                 inner = skip_typeref(type->array.element_type);
3721         } else {
3722                 return false;
3723         }
3724
3725         return is_type_integer(inner);
3726 }
3727
3728 static ir_initializer_t *create_ir_initializer_list(
3729                 const initializer_list_t *initializer, type_t *type)
3730 {
3731         type_path_t path;
3732         memset(&path, 0, sizeof(path));
3733         path.top_type = type;
3734         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3735
3736         descend_into_subtype(&path);
3737
3738         for (size_t i = 0; i < initializer->len; ++i) {
3739                 const initializer_t *sub_initializer = initializer->initializers[i];
3740
3741                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3742                         walk_designator(&path, sub_initializer->designator.designator);
3743                         continue;
3744                 }
3745
3746                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3747                         /* we might have to descend into types until we're at a scalar
3748                          * type */
3749                         while(true) {
3750                                 type_t *orig_top_type = path.top_type;
3751                                 type_t *top_type      = skip_typeref(orig_top_type);
3752
3753                                 if (is_type_scalar(top_type))
3754                                         break;
3755                                 descend_into_subtype(&path);
3756                         }
3757                 } else if (sub_initializer->kind == INITIALIZER_STRING
3758                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3759                         /* we might have to descend into types until we're at a scalar
3760                          * type */
3761                         while (true) {
3762                                 type_t *orig_top_type = path.top_type;
3763                                 type_t *top_type      = skip_typeref(orig_top_type);
3764
3765                                 if (is_string_type(top_type))
3766                                         break;
3767                                 descend_into_subtype(&path);
3768                         }
3769                 }
3770
3771                 ir_initializer_t *sub_irinitializer
3772                         = create_ir_initializer(sub_initializer, path.top_type);
3773
3774                 size_t path_len = ARR_LEN(path.path);
3775                 assert(path_len >= 1);
3776                 type_path_entry_t *entry        = & path.path[path_len-1];
3777                 ir_initializer_t  *tinitializer = entry->initializer;
3778                 set_initializer_compound_value(tinitializer, entry->index,
3779                                                sub_irinitializer);
3780
3781                 advance_current_object(&path);
3782         }
3783
3784         assert(ARR_LEN(path.path) >= 1);
3785         ir_initializer_t *result = path.path[0].initializer;
3786         DEL_ARR_F(path.path);
3787
3788         return result;
3789 }
3790
3791 static ir_initializer_t *create_ir_initializer_string(
3792                 const initializer_string_t *initializer, type_t *type)
3793 {
3794         type = skip_typeref(type);
3795
3796         size_t            string_len    = initializer->string.size;
3797         assert(type->kind == TYPE_ARRAY);
3798         assert(type->array.size_constant);
3799         size_t            len           = type->array.size;
3800         ir_initializer_t *irinitializer = create_initializer_compound(len);
3801
3802         const char *string = initializer->string.begin;
3803         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3804
3805         for (size_t i = 0; i < len; ++i) {
3806                 char c = 0;
3807                 if (i < string_len)
3808                         c = string[i];
3809
3810                 tarval           *tv = new_tarval_from_long(c, mode);
3811                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3812
3813                 set_initializer_compound_value(irinitializer, i, char_initializer);
3814         }
3815
3816         return irinitializer;
3817 }
3818
3819 static ir_initializer_t *create_ir_initializer_wide_string(
3820                 const initializer_wide_string_t *initializer, type_t *type)
3821 {
3822         size_t            string_len    = initializer->string.size;
3823         assert(type->kind == TYPE_ARRAY);
3824         assert(type->array.size_constant);
3825         size_t            len           = type->array.size;
3826         ir_initializer_t *irinitializer = create_initializer_compound(len);
3827
3828         const wchar_rep_t *string = initializer->string.begin;
3829         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3830
3831         for (size_t i = 0; i < len; ++i) {
3832                 wchar_rep_t c = 0;
3833                 if (i < string_len) {
3834                         c = string[i];
3835                 }
3836                 tarval *tv = new_tarval_from_long(c, mode);
3837                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3838
3839                 set_initializer_compound_value(irinitializer, i, char_initializer);
3840         }
3841
3842         return irinitializer;
3843 }
3844
3845 static ir_initializer_t *create_ir_initializer(
3846                 const initializer_t *initializer, type_t *type)
3847 {
3848         switch(initializer->kind) {
3849                 case INITIALIZER_STRING:
3850                         return create_ir_initializer_string(&initializer->string, type);
3851
3852                 case INITIALIZER_WIDE_STRING:
3853                         return create_ir_initializer_wide_string(&initializer->wide_string,
3854                                                                  type);
3855
3856                 case INITIALIZER_LIST:
3857                         return create_ir_initializer_list(&initializer->list, type);
3858
3859                 case INITIALIZER_VALUE:
3860                         return create_ir_initializer_value(&initializer->value);
3861
3862                 case INITIALIZER_DESIGNATOR:
3863                         panic("unexpected designator initializer found");
3864         }
3865         panic("unknown initializer");
3866 }
3867
3868 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3869                 ir_node *base_addr)
3870 {
3871         if (is_atomic_type(type)) {
3872                 ir_mode *mode = get_type_mode(type);
3873                 tarval  *zero = get_mode_null(mode);
3874                 ir_node *cnst = new_d_Const(dbgi, zero);
3875
3876                 /* TODO: bitfields */
3877                 ir_node *mem    = get_store();
3878                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3879                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3880                 set_store(proj_m);
3881         } else {
3882                 assert(is_compound_type(type));
3883
3884                 int n_members;
3885                 if (is_Array_type(type)) {
3886                         assert(has_array_upper_bound(type, 0));
3887                         n_members = get_array_upper_bound_int(type, 0);
3888                 } else {
3889                         n_members = get_compound_n_members(type);
3890                 }
3891
3892                 for (int i = 0; i < n_members; ++i) {
3893                         ir_node *addr;
3894                         ir_type *irtype;
3895                         if (is_Array_type(type)) {
3896                                 ir_entity *entity   = get_array_element_entity(type);
3897                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3898                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3899                                 ir_node   *in[1]    = { cnst };
3900                                 irtype = get_array_element_type(type);
3901                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3902                         } else {
3903                                 ir_entity *member = get_compound_member(type, i);
3904
3905                                 irtype = get_entity_type(member);
3906                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3907                         }
3908
3909                         create_dynamic_null_initializer(irtype, dbgi, addr);
3910                 }
3911         }
3912 }
3913
3914 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3915                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3916 {
3917         switch(get_initializer_kind(initializer)) {
3918         case IR_INITIALIZER_NULL: {
3919                 create_dynamic_null_initializer(type, dbgi, base_addr);
3920                 return;
3921         }
3922         case IR_INITIALIZER_CONST: {
3923                 ir_node *node     = get_initializer_const_value(initializer);
3924                 ir_mode *mode     = get_irn_mode(node);
3925                 ir_type *ent_type = get_entity_type(entity);
3926
3927                 /* is it a bitfield type? */
3928                 if (is_Primitive_type(ent_type) &&
3929                                 get_primitive_base_type(ent_type) != NULL) {
3930                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3931                         return;
3932                 }
3933
3934                 assert(get_type_mode(type) == mode);
3935                 ir_node *mem    = get_store();
3936                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3937                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3938                 set_store(proj_m);
3939                 return;
3940         }
3941         case IR_INITIALIZER_TARVAL: {
3942                 tarval  *tv       = get_initializer_tarval_value(initializer);
3943                 ir_mode *mode     = get_tarval_mode(tv);
3944                 ir_node *cnst     = new_d_Const(dbgi, tv);
3945                 ir_type *ent_type = get_entity_type(entity);
3946
3947                 /* is it a bitfield type? */
3948                 if (is_Primitive_type(ent_type) &&
3949                                 get_primitive_base_type(ent_type) != NULL) {
3950                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3951                         return;
3952                 }
3953
3954                 assert(get_type_mode(type) == mode);
3955                 ir_node *mem    = get_store();
3956                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3957                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3958                 set_store(proj_m);
3959                 return;
3960         }
3961         case IR_INITIALIZER_COMPOUND: {
3962                 assert(is_compound_type(type));
3963                 int n_members;
3964                 if (is_Array_type(type)) {
3965                         assert(has_array_upper_bound(type, 0));
3966                         n_members = get_array_upper_bound_int(type, 0);
3967                 } else {
3968                         n_members = get_compound_n_members(type);
3969                 }
3970
3971                 if (get_initializer_compound_n_entries(initializer)
3972                                 != (unsigned) n_members)
3973                         panic("initializer doesn't match compound type");
3974
3975                 for (int i = 0; i < n_members; ++i) {
3976                         ir_node   *addr;
3977                         ir_type   *irtype;
3978                         ir_entity *sub_entity;
3979                         if (is_Array_type(type)) {
3980                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3981                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3982                                 ir_node   *in[1]    = { cnst };
3983                                 irtype     = get_array_element_type(type);
3984                                 sub_entity = get_array_element_entity(type);
3985                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3986                                                        sub_entity);
3987                         } else {
3988                                 sub_entity = get_compound_member(type, i);
3989                                 irtype     = get_entity_type(sub_entity);
3990                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3991                                                              sub_entity);
3992                         }
3993
3994                         ir_initializer_t *sub_init
3995                                 = get_initializer_compound_value(initializer, i);
3996
3997                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3998                                                        addr);
3999                 }
4000                 return;
4001         }
4002         }
4003
4004         panic("invalid IR_INITIALIZER found");
4005 }
4006
4007 static void create_dynamic_initializer(ir_initializer_t *initializer,
4008                 dbg_info *dbgi, ir_entity *entity)
4009 {
4010         ir_node *frame     = get_local_frame(entity);
4011         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4012         ir_type *type      = get_entity_type(entity);
4013
4014         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4015 }
4016
4017 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4018                                      ir_entity *entity, type_t *type)
4019 {
4020         ir_node *memory = get_store();
4021         ir_node *nomem  = new_NoMem();
4022         ir_node *frame  = get_irg_frame(current_ir_graph);
4023         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4024
4025         if (initializer->kind == INITIALIZER_VALUE) {
4026                 initializer_value_t *initializer_value = &initializer->value;
4027
4028                 ir_node *value = expression_to_firm(initializer_value->value);
4029                 type = skip_typeref(type);
4030                 assign_value(dbgi, addr, type, value);
4031                 return;
4032         }
4033
4034         if (!is_constant_initializer(initializer)) {
4035                 ir_initializer_t *irinitializer
4036                         = create_ir_initializer(initializer, type);
4037
4038                 create_dynamic_initializer(irinitializer, dbgi, entity);
4039                 return;
4040         }
4041
4042         /* create the ir_initializer */
4043         ir_graph *const old_current_ir_graph = current_ir_graph;
4044         current_ir_graph = get_const_code_irg();
4045
4046         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4047
4048         assert(current_ir_graph == get_const_code_irg());
4049         current_ir_graph = old_current_ir_graph;
4050
4051         /* create a "template" entity which is copied to the entity on the stack */
4052         ident     *const id          = id_unique("initializer.%u");
4053         ir_type   *const irtype      = get_ir_type(type);
4054         ir_type   *const global_type = get_glob_type();
4055         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4056         set_entity_ld_ident(init_entity, id);
4057
4058         set_entity_variability(init_entity, variability_initialized);
4059         set_entity_visibility(init_entity, visibility_local);
4060         set_entity_allocation(init_entity, allocation_static);
4061
4062         set_entity_initializer(init_entity, irinitializer);
4063
4064         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4065         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4066
4067         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4068         set_store(copyb_mem);
4069 }
4070
4071 static void create_initializer_local_variable_entity(entity_t *entity)
4072 {
4073         assert(entity->kind == ENTITY_VARIABLE);
4074         initializer_t *initializer = entity->variable.initializer;
4075         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4076         ir_entity     *irentity    = entity->variable.v.entity;
4077         type_t        *type        = entity->declaration.type;
4078
4079         type = get_aligned_type(type, entity->variable.alignment);
4080         create_local_initializer(initializer, dbgi, irentity, type);
4081 }
4082
4083 static void create_variable_initializer(entity_t *entity)
4084 {
4085         assert(entity->kind == ENTITY_VARIABLE);
4086         initializer_t *initializer = entity->variable.initializer;
4087         if (initializer == NULL)
4088                 return;
4089
4090         declaration_kind_t declaration_kind
4091                 = (declaration_kind_t) entity->declaration.kind;
4092         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4093                 create_initializer_local_variable_entity(entity);
4094                 return;
4095         }
4096
4097         type_t            *type = entity->declaration.type;
4098         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4099
4100         if (initializer->kind == INITIALIZER_VALUE) {
4101                 initializer_value_t *initializer_value = &initializer->value;
4102                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4103
4104                 ir_node *value = expression_to_firm(initializer_value->value);
4105
4106                 type_t  *type = initializer_value->value->base.type;
4107                 ir_mode *mode = get_ir_mode_storage(type);
4108                 value = create_conv(dbgi, value, mode);
4109                 value = do_strict_conv(dbgi, value);
4110
4111                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4112                         set_value(entity->variable.v.value_number, value);
4113                 } else {
4114                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4115
4116                         ir_entity *irentity = entity->variable.v.entity;
4117
4118                         if (tq & TYPE_QUALIFIER_CONST) {
4119                                 set_entity_variability(irentity, variability_constant);
4120                         } else {
4121                                 set_entity_variability(irentity, variability_initialized);
4122                         }
4123                         set_atomic_ent_value(irentity, value);
4124                 }
4125         } else {
4126                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4127                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4128
4129                 ir_entity        *irentity        = entity->variable.v.entity;
4130                 ir_initializer_t *irinitializer
4131                         = create_ir_initializer(initializer, type);
4132
4133                 if (tq & TYPE_QUALIFIER_CONST) {
4134                         set_entity_variability(irentity, variability_constant);
4135                 } else {
4136                         set_entity_variability(irentity, variability_initialized);
4137                 }
4138                 set_entity_initializer(irentity, irinitializer);
4139         }
4140 }
4141
4142 static void create_variable_length_array(entity_t *entity)
4143 {
4144         assert(entity->kind == ENTITY_VARIABLE);
4145         assert(entity->variable.initializer == NULL);
4146
4147         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4148         entity->variable.v.vla_base = NULL;
4149
4150         /* TODO: record VLA somewhere so we create the free node when we leave
4151          * it's scope */
4152 }
4153
4154 static void allocate_variable_length_array(entity_t *entity)
4155 {
4156         assert(entity->kind == ENTITY_VARIABLE);
4157         assert(entity->variable.initializer == NULL);
4158         assert(get_cur_block() != NULL);
4159
4160         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4161         type_t   *type      = entity->declaration.type;
4162         ir_type  *el_type   = get_ir_type(type->array.element_type);
4163
4164         /* make sure size_node is calculated */
4165         get_type_size(type);
4166         ir_node  *elems = type->array.size_node;
4167         ir_node  *mem   = get_store();
4168         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4169
4170         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4171         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4172         set_store(proj_m);
4173
4174         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4175         entity->variable.v.vla_base = addr;
4176 }
4177
4178 /**
4179  * Creates a Firm local variable from a declaration.
4180  */
4181 static void create_local_variable(entity_t *entity)
4182 {
4183         assert(entity->kind == ENTITY_VARIABLE);
4184         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4185
4186         bool needs_entity = entity->variable.address_taken;
4187         type_t *type = skip_typeref(entity->declaration.type);
4188
4189         /* is it a variable length array? */
4190         if (is_type_array(type) && !type->array.size_constant) {
4191                 create_variable_length_array(entity);
4192                 return;
4193         } else if (is_type_array(type) || is_type_compound(type)) {
4194                 needs_entity = true;
4195         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4196                 needs_entity = true;
4197         }
4198
4199         if (needs_entity) {
4200                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4201                 create_variable_entity(entity,
4202                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4203                                        frame_type);
4204         } else {
4205                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4206                 entity->variable.v.value_number = next_value_number_function;
4207                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4208                                         entity);
4209                 ++next_value_number_function;
4210         }
4211 }
4212
4213 static void create_local_static_variable(entity_t *entity)
4214 {
4215         assert(entity->kind == ENTITY_VARIABLE);
4216         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4217
4218         type_t    *type = skip_typeref(entity->declaration.type);
4219         type            = get_aligned_type(type, entity->variable.alignment);
4220
4221         ir_type   *const var_type = entity->variable.thread_local ?
4222                 get_tls_type() : get_glob_type();
4223         ir_type   *const irtype   = get_ir_type(type);
4224         dbg_info  *const dbgi     = get_dbg_info(&entity->base.source_position);
4225
4226         size_t l = strlen(entity->base.symbol->string);
4227         char   buf[l + sizeof(".%u")];
4228         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4229         ident     *const id = id_unique(buf);
4230
4231         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4232
4233         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4234                 set_entity_volatility(irentity, volatility_is_volatile);
4235         }
4236
4237         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4238         entity->variable.v.entity = irentity;
4239
4240         set_entity_ld_ident(irentity, id);
4241         set_entity_variability(irentity, variability_uninitialized);
4242         set_entity_visibility(irentity, visibility_local);
4243         set_entity_allocation(irentity, entity->variable.thread_local ?
4244                 allocation_automatic : allocation_static);
4245
4246         ir_graph *const old_current_ir_graph = current_ir_graph;
4247         current_ir_graph = get_const_code_irg();
4248
4249         create_variable_initializer(entity);
4250
4251         assert(current_ir_graph == get_const_code_irg());
4252         current_ir_graph = old_current_ir_graph;
4253 }
4254
4255
4256
4257 static void return_statement_to_firm(return_statement_t *statement)
4258 {
4259         if (get_cur_block() == NULL)
4260                 return;
4261
4262         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4263         type_t   *type        = current_function_entity->declaration.type;
4264         ir_type  *func_irtype = get_ir_type(type);
4265
4266
4267         ir_node *in[1];
4268         int      in_len;
4269         if (get_method_n_ress(func_irtype) > 0) {
4270                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4271
4272                 if (statement->value != NULL) {
4273                         ir_node *node = expression_to_firm(statement->value);
4274                         if (!is_compound_type(res_type)) {
4275                                 type_t  *type = statement->value->base.type;
4276                                 ir_mode *mode = get_ir_mode_storage(type);
4277                                 node          = create_conv(dbgi, node, mode);
4278                                 node          = do_strict_conv(dbgi, node);
4279                         }
4280                         in[0] = node;
4281                 } else {
4282                         ir_mode *mode;
4283                         if (is_compound_type(res_type)) {
4284                                 mode = mode_P_data;
4285                         } else {
4286                                 mode = get_type_mode(res_type);
4287                         }
4288                         in[0] = new_Unknown(mode);
4289                 }
4290                 in_len = 1;
4291         } else {
4292                 /* build return_value for its side effects */
4293                 if (statement->value != NULL) {
4294                         expression_to_firm(statement->value);
4295                 }
4296                 in_len = 0;
4297         }
4298
4299         ir_node  *store = get_store();
4300         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4301
4302         ir_node *end_block = get_irg_end_block(current_ir_graph);
4303         add_immBlock_pred(end_block, ret);
4304
4305         set_cur_block(NULL);
4306 }
4307
4308 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4309 {
4310         if (get_cur_block() == NULL)
4311                 return NULL;
4312
4313         return expression_to_firm(statement->expression);
4314 }
4315
4316 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4317 {
4318         entity_t *entity = compound->scope.entities;
4319         for ( ; entity != NULL; entity = entity->base.next) {
4320                 if (!is_declaration(entity))
4321                         continue;
4322
4323                 create_local_declaration(entity);
4324         }
4325
4326         ir_node     *result    = NULL;
4327         statement_t *statement = compound->statements;
4328         for ( ; statement != NULL; statement = statement->base.next) {
4329                 if (statement->base.next == NULL
4330                                 && statement->kind == STATEMENT_EXPRESSION) {
4331                         result = expression_statement_to_firm(
4332                                         &statement->expression);
4333                         break;
4334                 }
4335                 statement_to_firm(statement);
4336         }
4337
4338         return result;
4339 }
4340
4341 static void create_global_variable(entity_t *entity)
4342 {
4343         assert(entity->kind == ENTITY_VARIABLE);
4344
4345         ir_visibility vis;
4346         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4347                 case STORAGE_CLASS_STATIC: vis = visibility_local;              break;
4348                 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4349                 case STORAGE_CLASS_NONE:   vis = visibility_external_visible;   break;
4350
4351                 default: panic("Invalid storage class for global variable");
4352         }
4353
4354         ir_type *var_type = entity->variable.thread_local ?
4355                 get_tls_type() : get_glob_type();
4356         create_variable_entity(entity,
4357                         DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4358         set_entity_visibility(entity->variable.v.entity, vis);
4359 }
4360
4361 static void create_local_declaration(entity_t *entity)
4362 {
4363         assert(is_declaration(entity));
4364
4365         /* construct type */
4366         (void) get_ir_type(entity->declaration.type);
4367         if (entity->base.symbol == NULL) {
4368                 return;
4369         }
4370
4371         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4372         case STORAGE_CLASS_STATIC:
4373                 create_local_static_variable(entity);
4374                 return;
4375         case STORAGE_CLASS_EXTERN:
4376                 if (entity->kind == ENTITY_FUNCTION) {
4377                         assert(entity->function.statement == NULL);
4378                         get_function_entity(entity);
4379                 } else {
4380                         create_global_variable(entity);
4381                         create_variable_initializer(entity);
4382                 }
4383                 return;
4384         case STORAGE_CLASS_NONE:
4385         case STORAGE_CLASS_AUTO:
4386         case STORAGE_CLASS_REGISTER:
4387                 if (entity->kind == ENTITY_FUNCTION) {
4388                         if (entity->function.statement != NULL) {
4389                                 get_function_entity(entity);
4390                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4391                                 enqueue_inner_function(entity);
4392                         } else {
4393                                 get_function_entity(entity);
4394                         }
4395                 } else {
4396                         create_local_variable(entity);
4397                 }
4398                 return;
4399         case STORAGE_CLASS_TYPEDEF:
4400                 break;
4401         }
4402         panic("invalid storage class found");
4403 }
4404
4405 static void initialize_local_declaration(entity_t *entity)
4406 {
4407         if (entity->base.symbol == NULL)
4408                 return;
4409
4410         switch ((declaration_kind_t) entity->declaration.kind) {
4411         case DECLARATION_KIND_LOCAL_VARIABLE:
4412         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4413                 create_variable_initializer(entity);
4414                 return;
4415
4416         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4417                 allocate_variable_length_array(entity);
4418                 return;
4419
4420         case DECLARATION_KIND_COMPOUND_MEMBER:
4421         case DECLARATION_KIND_GLOBAL_VARIABLE:
4422         case DECLARATION_KIND_FUNCTION:
4423         case DECLARATION_KIND_INNER_FUNCTION:
4424                 return;
4425
4426         case DECLARATION_KIND_PARAMETER:
4427         case DECLARATION_KIND_PARAMETER_ENTITY:
4428                 panic("can't initialize parameters");
4429
4430         case DECLARATION_KIND_UNKNOWN:
4431                 panic("can't initialize unknown declaration");
4432         }
4433         panic("invalid declaration kind");
4434 }
4435
4436 static void declaration_statement_to_firm(declaration_statement_t *statement)
4437 {
4438         entity_t *      entity = statement->declarations_begin;
4439         entity_t *const last   = statement->declarations_end;
4440         if (entity != NULL) {
4441                 for ( ;; entity = entity->base.next) {
4442                         if (is_declaration(entity)) {
4443                                 initialize_local_declaration(entity);
4444                         } else if (entity->kind == ENTITY_TYPEDEF) {
4445                                 type_t *const type = skip_typeref(entity->typedefe.type);
4446                                 if (is_type_array(type) && type->array.is_vla)
4447                                         get_vla_size(&type->array);
4448                         }
4449                         if (entity == last)
4450                                 break;
4451                 }
4452         }
4453 }
4454
4455 static void if_statement_to_firm(if_statement_t *statement)
4456 {
4457         ir_node *cur_block = get_cur_block();
4458
4459         ir_node *fallthrough_block = NULL;
4460
4461         /* the true (blocks) */
4462         ir_node *true_block = NULL;
4463         if (statement->true_statement != NULL) {
4464                 true_block = new_immBlock();
4465                 set_cur_block(true_block);
4466                 statement_to_firm(statement->true_statement);
4467                 if (get_cur_block() != NULL) {
4468                         ir_node *jmp = new_Jmp();
4469                         if (fallthrough_block == NULL)
4470                                 fallthrough_block = new_immBlock();
4471                         add_immBlock_pred(fallthrough_block, jmp);
4472                 }
4473         }
4474
4475         /* the false (blocks) */
4476         ir_node *false_block = NULL;
4477         if (statement->false_statement != NULL) {
4478                 false_block = new_immBlock();
4479                 set_cur_block(false_block);
4480
4481                 statement_to_firm(statement->false_statement);
4482                 if (get_cur_block() != NULL) {
4483                         ir_node *jmp = new_Jmp();
4484                         if (fallthrough_block == NULL)
4485                                 fallthrough_block = new_immBlock();
4486                         add_immBlock_pred(fallthrough_block, jmp);
4487                 }
4488         }
4489
4490         /* create the condition */
4491         if (cur_block != NULL) {
4492                 if (true_block == NULL || false_block == NULL) {
4493                         if (fallthrough_block == NULL)
4494                                 fallthrough_block = new_immBlock();
4495                         if (true_block == NULL)
4496                                 true_block = fallthrough_block;
4497                         if (false_block == NULL)
4498                                 false_block = fallthrough_block;
4499                 }
4500
4501                 set_cur_block(cur_block);
4502                 create_condition_evaluation(statement->condition, true_block,
4503                                             false_block);
4504         }
4505
4506         mature_immBlock(true_block);
4507         if (false_block != fallthrough_block && false_block != NULL) {
4508                 mature_immBlock(false_block);
4509         }
4510         if (fallthrough_block != NULL) {
4511                 mature_immBlock(fallthrough_block);
4512         }
4513
4514         set_cur_block(fallthrough_block);
4515 }
4516
4517 static void while_statement_to_firm(while_statement_t *statement)
4518 {
4519         ir_node *jmp = NULL;
4520         if (get_cur_block() != NULL) {
4521                 jmp = new_Jmp();
4522         }
4523
4524         /* create the header block */
4525         ir_node *header_block = new_immBlock();
4526         if (jmp != NULL) {
4527                 add_immBlock_pred(header_block, jmp);
4528         }
4529
4530         /* the loop body */
4531         ir_node *old_continue_label = continue_label;
4532         ir_node *old_break_label    = break_label;
4533         continue_label              = header_block;
4534         break_label                 = NULL;
4535
4536         ir_node *body_block = new_immBlock();
4537         set_cur_block(body_block);
4538         statement_to_firm(statement->body);
4539         ir_node *false_block = break_label;
4540
4541         assert(continue_label == header_block);
4542         continue_label = old_continue_label;
4543         break_label    = old_break_label;
4544
4545         if (get_cur_block() != NULL) {
4546                 jmp = new_Jmp();
4547                 add_immBlock_pred(header_block, jmp);
4548         }
4549
4550         /* shortcut for while(true) */
4551         if (is_constant_expression(statement->condition)
4552                         && fold_constant(statement->condition) != 0) {
4553                 set_cur_block(header_block);
4554                 ir_node *header_jmp = new_Jmp();
4555                 add_immBlock_pred(body_block, header_jmp);
4556
4557                 keep_alive(body_block);
4558                 keep_all_memory(body_block);
4559                 set_cur_block(body_block);
4560         } else {
4561                 if (false_block == NULL) {
4562                         false_block = new_immBlock();
4563                 }
4564
4565                 /* create the condition */
4566                 set_cur_block(header_block);
4567
4568                 create_condition_evaluation(statement->condition, body_block,
4569                                             false_block);
4570         }
4571
4572         mature_immBlock(body_block);
4573         mature_immBlock(header_block);
4574         if (false_block != NULL) {
4575                 mature_immBlock(false_block);
4576         }
4577
4578         set_cur_block(false_block);
4579 }
4580
4581 static void do_while_statement_to_firm(do_while_statement_t *statement)
4582 {
4583         ir_node *jmp = NULL;
4584         if (get_cur_block() != NULL) {
4585                 jmp = new_Jmp();
4586         }
4587
4588         /* create the header block */
4589         ir_node *header_block = new_immBlock();
4590
4591         /* the loop body */
4592         ir_node *body_block = new_immBlock();
4593         if (jmp != NULL) {
4594                 add_immBlock_pred(body_block, jmp);
4595         }
4596
4597         ir_node *old_continue_label = continue_label;
4598         ir_node *old_break_label    = break_label;
4599         continue_label              = header_block;
4600         break_label                 = NULL;
4601
4602         set_cur_block(body_block);
4603         statement_to_firm(statement->body);
4604         ir_node *false_block = break_label;
4605
4606         assert(continue_label == header_block);
4607         continue_label = old_continue_label;
4608         break_label    = old_break_label;
4609
4610         if (get_cur_block() != NULL) {
4611                 ir_node *body_jmp = new_Jmp();
4612                 add_immBlock_pred(header_block, body_jmp);
4613                 mature_immBlock(header_block);
4614         }
4615
4616         if (false_block == NULL) {
4617                 false_block = new_immBlock();
4618         }
4619
4620         /* create the condition */
4621         set_cur_block(header_block);
4622
4623         create_condition_evaluation(statement->condition, body_block, false_block);
4624         mature_immBlock(body_block);
4625         mature_immBlock(header_block);
4626         mature_immBlock(false_block);
4627
4628         set_cur_block(false_block);
4629 }
4630
4631 static void for_statement_to_firm(for_statement_t *statement)
4632 {
4633         ir_node *jmp = NULL;
4634
4635         /* create declarations */
4636         entity_t *entity = statement->scope.entities;
4637         for ( ; entity != NULL; entity = entity->base.next) {
4638                 if (!is_declaration(entity))
4639                         continue;
4640
4641                 create_local_declaration(entity);
4642         }
4643
4644         if (get_cur_block() != NULL) {
4645                 entity = statement->scope.entities;
4646                 for ( ; entity != NULL; entity = entity->base.next) {
4647                         if (!is_declaration(entity))
4648                                 continue;
4649
4650                         initialize_local_declaration(entity);
4651                 }
4652
4653                 if (statement->initialisation != NULL) {
4654                         expression_to_firm(statement->initialisation);
4655                 }
4656
4657                 jmp = new_Jmp();
4658         }
4659
4660
4661         /* create the step block */
4662         ir_node *const step_block = new_immBlock();
4663         set_cur_block(step_block);
4664         if (statement->step != NULL) {
4665                 expression_to_firm(statement->step);
4666         }
4667         ir_node *const step_jmp = new_Jmp();
4668
4669         /* create the header block */
4670         ir_node *const header_block = new_immBlock();
4671         set_cur_block(header_block);
4672         if (jmp != NULL) {
4673                 add_immBlock_pred(header_block, jmp);
4674         }
4675         add_immBlock_pred(header_block, step_jmp);
4676
4677         /* the false block */
4678         ir_node *const false_block = new_immBlock();
4679
4680         /* the loop body */
4681         ir_node *body_block;
4682         if (statement->body != NULL) {
4683                 ir_node *const old_continue_label = continue_label;
4684                 ir_node *const old_break_label    = break_label;
4685                 continue_label = step_block;
4686                 break_label    = false_block;
4687
4688                 body_block = new_immBlock();
4689                 set_cur_block(body_block);
4690                 statement_to_firm(statement->body);
4691
4692                 assert(continue_label == step_block);
4693                 assert(break_label    == false_block);
4694                 continue_label = old_continue_label;
4695                 break_label    = old_break_label;
4696
4697                 if (get_cur_block() != NULL) {
4698                         jmp = new_Jmp();
4699                         add_immBlock_pred(step_block, jmp);
4700                 }
4701         } else {
4702                 body_block = step_block;
4703         }
4704
4705         /* create the condition */
4706         set_cur_block(header_block);
4707         if (statement->condition != NULL) {
4708                 create_condition_evaluation(statement->condition, body_block,
4709                                             false_block);
4710         } else {
4711                 keep_alive(header_block);
4712                 keep_all_memory(header_block);
4713                 jmp = new_Jmp();
4714                 add_immBlock_pred(body_block, jmp);
4715         }
4716
4717         mature_immBlock(body_block);
4718         mature_immBlock(false_block);
4719         mature_immBlock(step_block);
4720         mature_immBlock(header_block);
4721         mature_immBlock(false_block);
4722
4723         set_cur_block(false_block);
4724 }
4725
4726 static void create_jump_statement(const statement_t *statement,
4727                                   ir_node *target_block)
4728 {
4729         if (get_cur_block() == NULL)
4730                 return;
4731
4732         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4733         ir_node  *jump = new_d_Jmp(dbgi);
4734         add_immBlock_pred(target_block, jump);
4735
4736         set_cur_block(NULL);
4737 }
4738
4739 static ir_node *get_break_label(void)
4740 {
4741         if (break_label == NULL) {
4742                 break_label = new_immBlock();
4743         }
4744         return break_label;
4745 }
4746
4747 static void switch_statement_to_firm(switch_statement_t *statement)
4748 {
4749         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4750
4751         ir_node *expression  = expression_to_firm(statement->expression);
4752         ir_node *cond        = new_d_Cond(dbgi, expression);
4753
4754         set_cur_block(NULL);
4755
4756         ir_node *const old_switch_cond       = current_switch_cond;
4757         ir_node *const old_break_label       = break_label;
4758         const bool     old_saw_default_label = saw_default_label;
4759         saw_default_label                    = false;
4760         current_switch_cond                  = cond;
4761         break_label                          = NULL;
4762         switch_statement_t *const old_switch = current_switch;
4763         current_switch                       = statement;
4764
4765         /* determine a free number for the default label */
4766         unsigned long num_cases = 0;
4767         long def_nr = 0;
4768         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4769                 if (l->expression == NULL) {
4770                         /* default case */
4771                         continue;
4772                 }
4773                 if (l->last_case >= l->first_case)
4774                         num_cases += l->last_case - l->first_case + 1;
4775                 if (l->last_case > def_nr)
4776                         def_nr = l->last_case;
4777         }
4778
4779         if (def_nr == INT_MAX) {
4780                 /* Bad: an overflow will occurr, we cannot be sure that the
4781                  * maximum + 1 is a free number. Scan the values a second
4782                  * time to find a free number.
4783                  */
4784                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4785
4786                 memset(bits, 0, (num_cases + 7) >> 3);
4787                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4788                         if (l->expression == NULL) {
4789                                 /* default case */
4790                                 continue;
4791                         }
4792                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4793                         if (start < num_cases && l->last_case >= 0) {
4794                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4795                                         (unsigned long)l->last_case : num_cases - 1;
4796                                 for (unsigned long cns = start; cns <= end; ++cns) {
4797                                         bits[cns >> 3] |= (1 << (cns & 7));
4798                                 }
4799                         }
4800                 }
4801                 /* We look at the first num_cases constants:
4802                  * Either they are densed, so we took the last (num_cases)
4803                  * one, or they are non densed, so we will find one free
4804                  * there...
4805                  */
4806                 unsigned long i;
4807                 for (i = 0; i < num_cases; ++i)
4808                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4809                                 break;
4810
4811                 free(bits);
4812                 def_nr = i;
4813         } else {
4814                 ++def_nr;
4815         }
4816         statement->default_proj_nr = def_nr;
4817
4818         if (statement->body != NULL) {
4819                 statement_to_firm(statement->body);
4820         }
4821
4822         if (get_cur_block() != NULL) {
4823                 ir_node *jmp = new_Jmp();
4824                 add_immBlock_pred(get_break_label(), jmp);
4825         }
4826
4827         if (!saw_default_label) {
4828                 set_cur_block(get_nodes_block(cond));
4829                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4830                                                         statement->default_proj_nr);
4831                 add_immBlock_pred(get_break_label(), proj);
4832         }
4833
4834         if (break_label != NULL) {
4835                 mature_immBlock(break_label);
4836         }
4837         set_cur_block(break_label);
4838
4839         assert(current_switch_cond == cond);
4840         current_switch      = old_switch;
4841         current_switch_cond = old_switch_cond;
4842         break_label         = old_break_label;
4843         saw_default_label   = old_saw_default_label;
4844 }
4845
4846 static void case_label_to_firm(const case_label_statement_t *statement)
4847 {
4848         if (statement->is_empty_range)
4849                 return;
4850
4851         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4852
4853         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4854
4855         ir_node *proj;
4856         ir_node *block     = new_immBlock();
4857
4858         set_cur_block(get_nodes_block(current_switch_cond));
4859         if (statement->expression != NULL) {
4860                 long pn     = statement->first_case;
4861                 long end_pn = statement->last_case;
4862                 assert(pn <= end_pn);
4863                 /* create jumps for all cases in the given range */
4864                 do {
4865                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4866                         add_immBlock_pred(block, proj);
4867                 } while(pn++ < end_pn);
4868         } else {
4869                 saw_default_label = true;
4870                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4871                                          current_switch->default_proj_nr);
4872
4873                 add_immBlock_pred(block, proj);
4874         }
4875
4876         if (fallthrough != NULL) {
4877                 add_immBlock_pred(block, fallthrough);
4878         }
4879         mature_immBlock(block);
4880         set_cur_block(block);
4881
4882         if (statement->statement != NULL) {
4883                 statement_to_firm(statement->statement);
4884         }
4885 }
4886
4887 static void label_to_firm(const label_statement_t *statement)
4888 {
4889         ir_node *block = get_label_block(statement->label);
4890
4891         if (get_cur_block() != NULL) {
4892                 ir_node *jmp = new_Jmp();
4893                 add_immBlock_pred(block, jmp);
4894         }
4895
4896         set_cur_block(block);
4897         keep_alive(block);
4898         keep_all_memory(block);
4899
4900         if (statement->statement != NULL) {
4901                 statement_to_firm(statement->statement);
4902         }
4903 }
4904
4905 static void goto_to_firm(const goto_statement_t *statement)
4906 {
4907         if (get_cur_block() == NULL)
4908                 return;
4909
4910         if (statement->expression) {
4911                 ir_node  *irn  = expression_to_firm(statement->expression);
4912                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4913                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4914
4915                 set_irn_link(ijmp, ijmp_list);
4916                 ijmp_list = ijmp;
4917         } else {
4918                 ir_node *block = get_label_block(statement->label);
4919                 ir_node *jmp   = new_Jmp();
4920                 add_immBlock_pred(block, jmp);
4921         }
4922         set_cur_block(NULL);
4923 }
4924
4925 static void asm_statement_to_firm(const asm_statement_t *statement)
4926 {
4927         bool needs_memory = false;
4928
4929         if (statement->is_volatile) {
4930                 needs_memory = true;
4931         }
4932
4933         size_t         n_clobbers = 0;
4934         asm_clobber_t *clobber    = statement->clobbers;
4935         for ( ; clobber != NULL; clobber = clobber->next) {
4936                 const char *clobber_str = clobber->clobber.begin;
4937
4938                 if (!be_is_valid_clobber(clobber_str)) {
4939                         errorf(&statement->base.source_position,
4940                                    "invalid clobber '%s' specified", clobber->clobber);
4941                         continue;
4942                 }
4943
4944                 if (strcmp(clobber_str, "memory") == 0) {
4945                         needs_memory = true;
4946                         continue;
4947                 }
4948
4949                 ident *id = new_id_from_str(clobber_str);
4950                 obstack_ptr_grow(&asm_obst, id);
4951                 ++n_clobbers;
4952         }
4953         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4954         ident **clobbers = NULL;
4955         if (n_clobbers > 0) {
4956                 clobbers = obstack_finish(&asm_obst);
4957         }
4958
4959         size_t n_inputs  = 0;
4960         asm_argument_t *argument = statement->inputs;
4961         for ( ; argument != NULL; argument = argument->next)
4962                 n_inputs++;
4963         size_t n_outputs = 0;
4964         argument = statement->outputs;
4965         for ( ; argument != NULL; argument = argument->next)
4966                 n_outputs++;
4967
4968         unsigned next_pos = 0;
4969
4970         ir_node *ins[n_inputs + n_outputs + 1];
4971         size_t   in_size = 0;
4972
4973         ir_asm_constraint tmp_in_constraints[n_outputs];
4974
4975         const expression_t *out_exprs[n_outputs];
4976         ir_node            *out_addrs[n_outputs];
4977         size_t              out_size = 0;
4978
4979         argument = statement->outputs;
4980         for ( ; argument != NULL; argument = argument->next) {
4981                 const char *constraints = argument->constraints.begin;
4982                 asm_constraint_flags_t asm_flags
4983                         = be_parse_asm_constraints(constraints);
4984
4985                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4986                         warningf(&statement->base.source_position,
4987                                "some constraints in '%s' are not supported", constraints);
4988                 }
4989                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4990                         errorf(&statement->base.source_position,
4991                                "some constraints in '%s' are invalid", constraints);
4992                         continue;
4993                 }
4994                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4995                         errorf(&statement->base.source_position,
4996                                "no write flag specified for output constraints '%s'",
4997                                constraints);
4998                         continue;
4999                 }
5000
5001                 unsigned pos = next_pos++;
5002                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5003                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5004                         expression_t *expr = argument->expression;
5005                         ir_node      *addr = expression_to_addr(expr);
5006                         /* in+output, construct an artifical same_as constraint on the
5007                          * input */
5008                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5009                                 char     buf[64];
5010                                 ir_node *value = get_value_from_lvalue(expr, addr);
5011
5012                                 snprintf(buf, sizeof(buf), "%u", pos);
5013
5014                                 ir_asm_constraint constraint;
5015                                 constraint.pos              = pos;
5016                                 constraint.constraint       = new_id_from_str(buf);
5017                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5018                                 tmp_in_constraints[in_size] = constraint;
5019                                 ins[in_size] = value;
5020
5021                                 ++in_size;
5022                         }
5023
5024                         out_exprs[out_size] = expr;
5025                         out_addrs[out_size] = addr;
5026                         ++out_size;
5027                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5028                         /* pure memory ops need no input (but we have to make sure we
5029                          * attach to the memory) */
5030                         assert(! (asm_flags &
5031                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5032                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5033                         needs_memory = true;
5034
5035                         /* we need to attach the address to the inputs */
5036                         expression_t *expr = argument->expression;
5037
5038                         ir_asm_constraint constraint;
5039                         constraint.pos              = pos;
5040                         constraint.constraint       = new_id_from_str(constraints);
5041                         constraint.mode             = NULL;
5042                         tmp_in_constraints[in_size] = constraint;
5043
5044                         ins[in_size]          = expression_to_addr(expr);
5045                         ++in_size;
5046                         continue;
5047                 } else {
5048                         errorf(&statement->base.source_position,
5049                                "only modifiers but no place set in constraints '%s'",
5050                                constraints);
5051                         continue;
5052                 }
5053
5054                 ir_asm_constraint constraint;
5055                 constraint.pos        = pos;
5056                 constraint.constraint = new_id_from_str(constraints);
5057                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5058
5059                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5060         }
5061         assert(obstack_object_size(&asm_obst)
5062                         == out_size * sizeof(ir_asm_constraint));
5063         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5064
5065
5066         obstack_grow(&asm_obst, tmp_in_constraints,
5067                      in_size * sizeof(tmp_in_constraints[0]));
5068         /* find and count input and output arguments */
5069         argument = statement->inputs;
5070         for ( ; argument != NULL; argument = argument->next) {
5071                 const char *constraints = argument->constraints.begin;
5072                 asm_constraint_flags_t asm_flags
5073                         = be_parse_asm_constraints(constraints);
5074
5075                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5076                         errorf(&statement->base.source_position,
5077                                "some constraints in '%s' are not supported", constraints);
5078                         continue;
5079                 }
5080                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5081                         errorf(&statement->base.source_position,
5082                                "some constraints in '%s' are invalid", constraints);
5083                         continue;
5084                 }
5085                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5086                         errorf(&statement->base.source_position,
5087                                "write flag specified for input constraints '%s'",
5088                                constraints);
5089                         continue;
5090                 }
5091
5092                 ir_node *input;
5093                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5094                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5095                         /* we can treat this as "normal" input */
5096                         input = expression_to_firm(argument->expression);
5097                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5098                         /* pure memory ops need no input (but we have to make sure we
5099                          * attach to the memory) */
5100                         assert(! (asm_flags &
5101                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5102                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5103                         needs_memory = true;
5104                         input = expression_to_addr(argument->expression);
5105                 } else {
5106                         errorf(&statement->base.source_position,
5107                                "only modifiers but no place set in constraints '%s'",
5108                                constraints);
5109                         continue;
5110                 }
5111
5112                 ir_asm_constraint constraint;
5113                 constraint.pos        = next_pos++;
5114                 constraint.constraint = new_id_from_str(constraints);
5115                 constraint.mode       = get_irn_mode(input);
5116
5117                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5118                 ins[in_size++] = input;
5119         }
5120
5121         if (needs_memory) {
5122                 ir_asm_constraint constraint;
5123                 constraint.pos        = next_pos++;
5124                 constraint.constraint = new_id_from_str("");
5125                 constraint.mode       = mode_M;
5126
5127                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5128                 ins[in_size++] = get_store();
5129         }
5130
5131         assert(obstack_object_size(&asm_obst)
5132                         == in_size * sizeof(ir_asm_constraint));
5133         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5134
5135         /* create asm node */
5136         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5137
5138         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5139
5140         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5141                                   out_size, output_constraints,
5142                                   n_clobbers, clobbers, asm_text);
5143
5144         if (statement->is_volatile) {
5145                 set_irn_pinned(node, op_pin_state_pinned);
5146         } else {
5147                 set_irn_pinned(node, op_pin_state_floats);
5148         }
5149
5150         /* create output projs & connect them */
5151         if (needs_memory) {
5152                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5153                 set_store(projm);
5154         }
5155
5156         size_t i;
5157         for (i = 0; i < out_size; ++i) {
5158                 const expression_t *out_expr = out_exprs[i];
5159                 long                pn       = i;
5160                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5161                 ir_node            *proj     = new_Proj(node, mode, pn);
5162                 ir_node            *addr     = out_addrs[i];
5163
5164                 set_value_for_expression_addr(out_expr, proj, addr);
5165         }
5166 }
5167
5168 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
5169         statement_to_firm(statement->try_statement);
5170         warningf(&statement->base.source_position, "structured exception handling ignored");
5171 }
5172
5173 static void     leave_statement_to_firm(leave_statement_t *statement) {
5174         errorf(&statement->base.source_position, "__leave not supported yet");
5175 }
5176
5177 /**
5178  * Transform a statement.
5179  */
5180 static void statement_to_firm(statement_t *statement)
5181 {
5182 #ifndef NDEBUG
5183         assert(!statement->base.transformed);
5184         statement->base.transformed = true;
5185 #endif
5186
5187         switch (statement->kind) {
5188         case STATEMENT_INVALID:
5189                 panic("invalid statement found");
5190         case STATEMENT_EMPTY:
5191                 /* nothing */
5192                 return;
5193         case STATEMENT_COMPOUND:
5194                 compound_statement_to_firm(&statement->compound);
5195                 return;
5196         case STATEMENT_RETURN:
5197                 return_statement_to_firm(&statement->returns);
5198                 return;
5199         case STATEMENT_EXPRESSION:
5200                 expression_statement_to_firm(&statement->expression);
5201                 return;
5202         case STATEMENT_IF:
5203                 if_statement_to_firm(&statement->ifs);
5204                 return;
5205         case STATEMENT_WHILE:
5206                 while_statement_to_firm(&statement->whiles);
5207                 return;
5208         case STATEMENT_DO_WHILE:
5209                 do_while_statement_to_firm(&statement->do_while);
5210                 return;
5211         case STATEMENT_DECLARATION:
5212                 declaration_statement_to_firm(&statement->declaration);
5213                 return;
5214         case STATEMENT_BREAK:
5215                 create_jump_statement(statement, get_break_label());
5216                 return;
5217         case STATEMENT_CONTINUE:
5218                 create_jump_statement(statement, continue_label);
5219                 return;
5220         case STATEMENT_SWITCH:
5221                 switch_statement_to_firm(&statement->switchs);
5222                 return;
5223         case STATEMENT_CASE_LABEL:
5224                 case_label_to_firm(&statement->case_label);
5225                 return;
5226         case STATEMENT_FOR:
5227                 for_statement_to_firm(&statement->fors);
5228                 return;
5229         case STATEMENT_LABEL:
5230                 label_to_firm(&statement->label);
5231                 return;
5232         case STATEMENT_GOTO:
5233                 goto_to_firm(&statement->gotos);
5234                 return;
5235         case STATEMENT_ASM:
5236                 asm_statement_to_firm(&statement->asms);
5237                 return;
5238         case STATEMENT_MS_TRY:
5239                 ms_try_statement_to_firm(&statement->ms_try);
5240                 return;
5241         case STATEMENT_LEAVE:
5242                 leave_statement_to_firm(&statement->leave);
5243                 return;
5244         }
5245         panic("statement not implemented");
5246 }
5247
5248 static int count_local_variables(const entity_t *entity,
5249                                  const entity_t *const last)
5250 {
5251         int count = 0;
5252         for (; entity != NULL; entity = entity->base.next) {
5253                 type_t *type;
5254                 bool    address_taken;
5255
5256                 if (entity->kind == ENTITY_VARIABLE) {
5257                         type          = skip_typeref(entity->declaration.type);
5258                         address_taken = entity->variable.address_taken;
5259                 } else if (entity->kind == ENTITY_PARAMETER) {
5260                         type          = skip_typeref(entity->declaration.type);
5261                         address_taken = entity->parameter.address_taken;
5262                 } else {
5263                         continue;
5264                 }
5265
5266                 if (!address_taken && is_type_scalar(type))
5267                         ++count;
5268
5269                 if (entity == last)
5270                         break;
5271         }
5272         return count;
5273 }
5274
5275 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5276 {
5277         int *const count = env;
5278
5279         switch (stmt->kind) {
5280         case STATEMENT_DECLARATION: {
5281                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5282                 *count += count_local_variables(decl_stmt->declarations_begin,
5283                                 decl_stmt->declarations_end);
5284                 break;
5285         }
5286
5287         case STATEMENT_FOR:
5288                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5289                 break;
5290
5291         default:
5292                 break;
5293         }
5294 }
5295
5296 static int get_function_n_local_vars(entity_t *entity)
5297 {
5298         int count = 0;
5299
5300         /* count parameters */
5301         count += count_local_variables(entity->function.parameters.entities, NULL);
5302
5303         /* count local variables declared in body */
5304         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5305                         &count);
5306         return count;
5307 }
5308
5309 static void initialize_function_parameters(entity_t *entity)
5310 {
5311         assert(entity->kind == ENTITY_FUNCTION);
5312         ir_graph *irg             = current_ir_graph;
5313         ir_node  *args            = get_irg_args(irg);
5314         ir_node  *start_block     = get_irg_start_block(irg);
5315         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5316
5317         int       n         = 0;
5318         entity_t *parameter = entity->function.parameters.entities;
5319         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5320                 assert(parameter->kind == ENTITY_PARAMETER);
5321                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5322                 type_t *type = skip_typeref(parameter->declaration.type);
5323
5324                 bool needs_entity = parameter->parameter.address_taken;
5325                 assert(!is_type_array(type));
5326                 if (is_type_compound(type)) {
5327                         needs_entity = true;
5328                 }
5329
5330                 if (needs_entity) {
5331                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5332                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5333                         set_entity_ident(entity, id);
5334
5335                         parameter->declaration.kind
5336                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5337                         parameter->parameter.v.entity = entity;
5338                         continue;
5339                 }
5340
5341                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5342                 ir_mode *param_mode   = get_type_mode(param_irtype);
5343
5344                 long     pn    = n;
5345                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5346
5347                 ir_mode *mode = get_ir_mode_storage(type);
5348                 value = create_conv(NULL, value, mode);
5349                 value = do_strict_conv(NULL, value);
5350
5351                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5352                 parameter->parameter.v.value_number = next_value_number_function;
5353                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5354                                         parameter);
5355                 ++next_value_number_function;
5356
5357                 set_value(parameter->parameter.v.value_number, value);
5358         }
5359 }
5360
5361 /**
5362  * Handle additional decl modifiers for IR-graphs
5363  *
5364  * @param irg            the IR-graph
5365  * @param dec_modifiers  additional modifiers
5366  */
5367 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5368 {
5369         if (decl_modifiers & DM_RETURNS_TWICE) {
5370                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5371                 set_irg_additional_property(irg, mtp_property_returns_twice);
5372         }
5373         if (decl_modifiers & DM_NORETURN) {
5374                 /* TRUE if the declaration includes the Microsoft
5375                    __declspec(noreturn) specifier. */
5376                 set_irg_additional_property(irg, mtp_property_noreturn);
5377         }
5378         if (decl_modifiers & DM_NOTHROW) {
5379                 /* TRUE if the declaration includes the Microsoft
5380                    __declspec(nothrow) specifier. */
5381                 set_irg_additional_property(irg, mtp_property_nothrow);
5382         }
5383         if (decl_modifiers & DM_NAKED) {
5384                 /* TRUE if the declaration includes the Microsoft
5385                    __declspec(naked) specifier. */
5386                 set_irg_additional_property(irg, mtp_property_naked);
5387         }
5388         if (decl_modifiers & DM_FORCEINLINE) {
5389                 /* TRUE if the declaration includes the
5390                    Microsoft __forceinline specifier. */
5391                 set_irg_inline_property(irg, irg_inline_forced);
5392         }
5393         if (decl_modifiers & DM_NOINLINE) {
5394                 /* TRUE if the declaration includes the Microsoft
5395                    __declspec(noinline) specifier. */
5396                 set_irg_inline_property(irg, irg_inline_forbidden);
5397         }
5398 }
5399
5400 static void add_function_pointer(ir_type *segment, ir_entity *method,
5401                                  const char *unique_template)
5402 {
5403         ir_type   *method_type  = get_entity_type(method);
5404         ident     *id           = id_unique(unique_template);
5405         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5406
5407         ident     *ide          = id_unique(unique_template);
5408         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5409         ir_graph  *irg          = get_const_code_irg();
5410         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5411                                                            method, NULL);
5412
5413         set_entity_compiler_generated(ptr, 1);
5414         set_entity_variability(ptr, variability_constant);
5415         set_atomic_ent_value(ptr, val);
5416 }
5417
5418 /**
5419  * Generate possible IJmp branches to a given label block.
5420  */
5421 static void gen_ijmp_branches(ir_node *block) {
5422         ir_node *ijmp;
5423         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5424                 add_immBlock_pred(block, ijmp);
5425         }
5426 }
5427
5428 /**
5429  * Create code for a function.
5430  */
5431 static void create_function(entity_t *entity)
5432 {
5433         assert(entity->kind == ENTITY_FUNCTION);
5434         ir_entity *function_entity = get_function_entity(entity);
5435
5436         if (entity->function.statement == NULL)
5437                 return;
5438
5439         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5440                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5441                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5442         }
5443         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5444                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5445                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5446         }
5447
5448         current_function_entity = entity;
5449         current_function_name   = NULL;
5450         current_funcsig         = NULL;
5451
5452         assert(all_labels == NULL);
5453         all_labels = NEW_ARR_F(label_t *, 0);
5454         ijmp_list  = NULL;
5455
5456         int       n_local_vars = get_function_n_local_vars(entity);
5457         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5458
5459         ir_graph *old_current_function = current_function;
5460         current_function = irg;
5461
5462         set_irg_fp_model(irg, firm_opt.fp_model);
5463         tarval_enable_fp_ops(1);
5464         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5465
5466         ir_node *first_block = get_cur_block();
5467
5468         /* set inline flags */
5469         if (entity->function.is_inline)
5470                 set_irg_inline_property(irg, irg_inline_recomended);
5471         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5472
5473         next_value_number_function = 0;
5474         initialize_function_parameters(entity);
5475
5476         statement_to_firm(entity->function.statement);
5477
5478         ir_node *end_block = get_irg_end_block(irg);
5479
5480         /* do we have a return statement yet? */
5481         if (get_cur_block() != NULL) {
5482                 type_t *type = skip_typeref(entity->declaration.type);
5483                 assert(is_type_function(type));
5484                 const function_type_t *func_type   = &type->function;
5485                 const type_t          *return_type
5486                         = skip_typeref(func_type->return_type);
5487
5488                 ir_node *ret;
5489                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5490                         ret = new_Return(get_store(), 0, NULL);
5491                 } else {
5492                         ir_mode *mode;
5493                         if (is_type_scalar(return_type)) {
5494                                 mode = get_ir_mode_storage(func_type->return_type);
5495                         } else {
5496                                 mode = mode_P_data;
5497                         }
5498
5499                         ir_node *in[1];
5500                         /* §5.1.2.2.3 main implicitly returns 0 */
5501                         if (is_main(entity)) {
5502                                 in[0] = new_Const(get_mode_null(mode));
5503                         } else {
5504                                 in[0] = new_Unknown(mode);
5505                         }
5506                         ret = new_Return(get_store(), 1, in);
5507                 }
5508                 add_immBlock_pred(end_block, ret);
5509         }
5510
5511         bool has_computed_gotos = false;
5512         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5513                 label_t *label = all_labels[i];
5514                 if (label->address_taken) {
5515                         gen_ijmp_branches(label->block);
5516                         has_computed_gotos = true;
5517                 }
5518                 mature_immBlock(label->block);
5519         }
5520         if (has_computed_gotos) {
5521                 /* if we have computed goto's in the function, we cannot inline it */
5522                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5523                         warningf(&entity->base.source_position,
5524                                  "function '%Y' can never be inlined because it contains a computed goto",
5525                                  entity->base.symbol);
5526                 }
5527                 set_irg_inline_property(irg, irg_inline_forbidden);
5528         }
5529
5530         DEL_ARR_F(all_labels);
5531         all_labels = NULL;
5532
5533         mature_immBlock(first_block);
5534         mature_immBlock(end_block);
5535
5536         irg_finalize_cons(irg);
5537
5538         /* finalize the frame type */
5539         ir_type *frame_type = get_irg_frame_type(irg);
5540         int      n          = get_compound_n_members(frame_type);
5541         int      align_all  = 4;
5542         int      offset     = 0;
5543         for (int i = 0; i < n; ++i) {
5544                 ir_entity *entity      = get_compound_member(frame_type, i);
5545                 ir_type   *entity_type = get_entity_type(entity);
5546
5547                 int align = get_type_alignment_bytes(entity_type);
5548                 if (align > align_all)
5549                         align_all = align;
5550                 int misalign = 0;
5551                 if (align > 0) {
5552                         misalign  = offset % align;
5553                         if (misalign > 0) {
5554                                 offset += align - misalign;
5555                         }
5556                 }
5557
5558                 set_entity_offset(entity, offset);
5559                 offset += get_type_size_bytes(entity_type);
5560         }
5561         set_type_size_bytes(frame_type, offset);
5562         set_type_alignment_bytes(frame_type, align_all);
5563
5564         irg_vrfy(irg);
5565         current_function = old_current_function;
5566
5567         /* create inner functions */
5568         entity_t *inner;
5569         for (inner = next_inner_function(); inner != NULL;
5570              inner = next_inner_function()) {
5571                 create_function(inner);
5572         }
5573 }
5574
5575 static void scope_to_firm(scope_t *scope)
5576 {
5577         /* first pass: create declarations */
5578         entity_t *entity = scope->entities;
5579         for ( ; entity != NULL; entity = entity->base.next) {
5580                 if (entity->base.symbol == NULL)
5581                         continue;
5582
5583                 if (entity->kind == ENTITY_FUNCTION) {
5584                         get_function_entity(entity);
5585                 } else if (entity->kind == ENTITY_VARIABLE) {
5586                         create_global_variable(entity);
5587                 }
5588         }
5589
5590         /* second pass: create code/initializers */
5591         entity = scope->entities;
5592         for ( ; entity != NULL; entity = entity->base.next) {
5593                 if (entity->base.symbol == NULL)
5594                         continue;
5595
5596                 if (entity->kind == ENTITY_FUNCTION) {
5597                         create_function(entity);
5598                 } else if (entity->kind == ENTITY_VARIABLE) {
5599                         assert(entity->declaration.kind
5600                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5601                         current_ir_graph = get_const_code_irg();
5602                         create_variable_initializer(entity);
5603                 }
5604         }
5605 }
5606
5607 void init_ast2firm(void)
5608 {
5609         obstack_init(&asm_obst);
5610         init_atomic_modes();
5611
5612         /* OS option must be set to the backend */
5613         switch (firm_opt.os_support) {
5614         case OS_SUPPORT_MINGW:
5615                 create_ld_ident = create_name_win32;
5616                 break;
5617         case OS_SUPPORT_LINUX:
5618                 create_ld_ident = create_name_linux_elf;
5619                 break;
5620         case OS_SUPPORT_MACHO:
5621                 create_ld_ident = create_name_macho;
5622                 break;
5623         default:
5624                 panic("unexpected OS support mode");
5625         }
5626
5627         /* create idents for all known runtime functions */
5628         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5629                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5630         }
5631
5632         entitymap_init(&entitymap);
5633 }
5634
5635 static void init_ir_types(void)
5636 {
5637         static int ir_types_initialized = 0;
5638         if (ir_types_initialized)
5639                 return;
5640         ir_types_initialized = 1;
5641
5642         ir_type_int        = get_ir_type(type_int);
5643         ir_type_const_char = get_ir_type(type_const_char);
5644         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5645         ir_type_void       = get_ir_type(type_void);
5646
5647         const backend_params *be_params = be_get_backend_param();
5648         mode_float_arithmetic = be_params->mode_float_arithmetic;
5649 }
5650
5651 void exit_ast2firm(void)
5652 {
5653         entitymap_destroy(&entitymap);
5654         obstack_free(&asm_obst, NULL);
5655 }
5656
5657 static void global_asm_to_firm(statement_t *s)
5658 {
5659         for (; s != NULL; s = s->base.next) {
5660                 assert(s->kind == STATEMENT_ASM);
5661
5662                 char const *const text = s->asms.asm_text.begin;
5663                 size_t            size = s->asms.asm_text.size;
5664
5665                 /* skip the last \0 */
5666                 if (text[size - 1] == '\0')
5667                         --size;
5668
5669                 ident *const id = new_id_from_chars(text, size);
5670                 add_irp_asm(id);
5671         }
5672 }
5673
5674 void translation_unit_to_firm(translation_unit_t *unit)
5675 {
5676         /* just to be sure */
5677         continue_label           = NULL;
5678         break_label              = NULL;
5679         current_switch_cond      = NULL;
5680         current_translation_unit = unit;
5681
5682         init_ir_types();
5683         inner_functions = NEW_ARR_F(entity_t *, 0);
5684
5685         scope_to_firm(&unit->scope);
5686         global_asm_to_firm(unit->global_asm);
5687
5688         DEL_ARR_F(inner_functions);
5689         inner_functions  = NULL;
5690
5691         current_ir_graph         = NULL;
5692         current_translation_unit = NULL;
5693 }