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 "adt/util.h"
  36 #include "symbol_t.h"
  37 #include "token_t.h"
  38 #include "type_t.h"
  39 #include "ast_t.h"
  40 #include "entity_t.h"
  41 #include "parser.h"
  42 #include "diagnostic.h"
  43 #include "lang_features.h"
  44 #include "types.h"
  45 #include "type_hash.h"
  46 #include "mangle.h"
  47 #include "walk_statements.h"
  48 #include "warning.h"
  49 #include "entitymap_t.h"
  50 #include "driver/firm_opt.h"
  51 #include "driver/firm_cmdline.h"
  52
  53 static ir_type *ir_type_const_char;
  54 static ir_type *ir_type_wchar_t;
  55 static ir_type *ir_type_void;
  56 static ir_type *ir_type_int;
  57
  58 /* architecture specific floating point arithmetic mode (if any) */
  59 static ir_mode *mode_float_arithmetic;
  60
  61 static int        next_value_number_function;
  62 static ir_node   *continue_label;
  63 static ir_node   *break_label;
  64 static ir_node   *current_switch_cond;
  65 static bool       saw_default_label;
  66 static label_t  **all_labels;
  67 static entity_t **inner_functions;
  68 static ir_node   *ijmp_list;
  69 static bool       constant_folding;
  70
  71 extern bool       have_const_functions;
  72
  73 static const entity_t     *current_function_entity;
  74 static ir_node            *current_function_name;
  75 static ir_node            *current_funcsig;
  76 static switch_statement_t *current_switch;
  77 static ir_graph           *current_function;
  78 static translation_unit_t *current_translation_unit;
  79
  80 static entitymap_t  entitymap;
  81
  82 static struct obstack asm_obst;
  83
  84 typedef enum declaration_kind_t {
  85         DECLARATION_KIND_UNKNOWN,
  86         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  87         DECLARATION_KIND_GLOBAL_VARIABLE,
  88         DECLARATION_KIND_LOCAL_VARIABLE,
  89         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  90         DECLARATION_KIND_PARAMETER,
  91         DECLARATION_KIND_PARAMETER_ENTITY,
  92         DECLARATION_KIND_FUNCTION,
  93         DECLARATION_KIND_COMPOUND_MEMBER,
  94         DECLARATION_KIND_INNER_FUNCTION
  95 } declaration_kind_t;
  96
  97 static ir_mode *get_ir_mode_storage(type_t *type);
  98 /*
  99  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 100  * int that it returns bigger modes for floating point on some platforms
 101  * (x87 internally does arithemtic with 80bits)
 102  */
 103 static ir_mode *get_ir_mode_arithmetic(type_t *type);
 104
 105 static ir_type *get_ir_type_incomplete(type_t *type);
 106
 107 static void enqueue_inner_function(entity_t *entity)
 108 {
 109         ARR_APP1(entity_t*, inner_functions, entity);
 110 }
 111
 112 static entity_t *next_inner_function(void)
 113 {
 114         int len = ARR_LEN(inner_functions);
 115         if (len == 0)
 116                 return NULL;
 117
 118         entity_t *entity = inner_functions[len-1];
 119         ARR_SHRINKLEN(inner_functions, len-1);
 120
 121         return entity;
 122 }
 123
 124 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 125 {
 126         const entity_t *entity = get_irg_loc_description(irg, pos);
 127
 128         if (entity != NULL) {
 129                 warningf(&entity->base.source_position,
 130                          "%s '%#T' might be used uninitialized",
 131                          get_entity_kind_name(entity->kind),
 132                          entity->declaration.type, entity->base.symbol);
 133         }
 134         return new_r_Unknown(irg, mode);
 135 }
 136
 137 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 138 {
 139         const source_position_t *pos = (const source_position_t*) dbg;
 140         if (pos == NULL)
 141                 return 0;
 142         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 143                                    pos->linenr);
 144 }
 145
 146 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 147 {
 148         const source_position_t *pos = (const source_position_t*) dbg;
 149         if (pos == NULL)
 150                 return NULL;
 151         if (line != NULL)
 152                 *line = pos->linenr;
 153         return pos->input_name;
 154 }
 155
 156 static dbg_info *get_dbg_info(const source_position_t *pos)
 157 {
 158         return (dbg_info*) pos;
 159 }
 160
 161 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 162
 163 static ir_mode *mode_int, *mode_uint;
 164
 165 static ir_node *_expression_to_firm(const expression_t *expression);
 166 static ir_node *expression_to_firm(const expression_t *expression);
 167 static void create_local_declaration(entity_t *entity);
 168
 169 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 170 {
 171         unsigned flags = get_atomic_type_flags(kind);
 172         unsigned size  = get_atomic_type_size(kind);
 173         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 174                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 175                 char            name[64];
 176                 ir_mode_sort    sort;
 177                 unsigned        bit_size     = size * 8;
 178                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 179                 unsigned        modulo_shift;
 180                 ir_mode_arithmetic arithmetic;
 181
 182                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 183                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 184                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 185                                  bit_size);
 186                         sort         = irms_int_number;
 187                         arithmetic   = irma_twos_complement;
 188                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 189                 } else {
 190                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 191                         snprintf(name, sizeof(name), "F%u", bit_size);
 192                         sort         = irms_float_number;
 193                         arithmetic   = irma_ieee754;
 194                         modulo_shift = 0;
 195                 }
 196                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 197                                    modulo_shift);
 198         }
 199
 200         return NULL;
 201 }
 202
 203 /**
 204  * Initialises the atomic modes depending on the machine size.
 205  */
 206 static void init_atomic_modes(void)
 207 {
 208         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 209                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 210         }
 211         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 212         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 213
 214         /* there's no real void type in firm */
 215         atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
 216
 217         /* initialize pointer modes */
 218         char            name[64];
 219         ir_mode_sort    sort         = irms_reference;
 220         unsigned        bit_size     = machine_size;
 221         bool            is_signed    = 0;
 222         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 223         unsigned        modulo_shift
 224                 = bit_size < machine_size ? machine_size : bit_size;
 225
 226         snprintf(name, sizeof(name), "p%u", machine_size);
 227         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 228                                         modulo_shift);
 229
 230         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 231         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 232
 233         /* Hmm, pointers should be machine size */
 234         set_modeP_data(ptr_mode);
 235         set_modeP_code(ptr_mode);
 236 }
 237
 238 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 239 {
 240         assert(kind <= ATOMIC_TYPE_LAST);
 241         return atomic_modes[kind];
 242 }
 243
 244 static unsigned get_compound_type_size(compound_type_t *type)
 245 {
 246         ir_type *irtype = get_ir_type((type_t*) type);
 247         return get_type_size_bytes(irtype);
 248 }
 249
 250 static unsigned get_array_type_size(array_type_t *type)
 251 {
 252         assert(!type->is_vla);
 253         ir_type *irtype = get_ir_type((type_t*) type);
 254         return get_type_size_bytes(irtype);
 255 }
 256
 257 static unsigned get_type_size_const(type_t *type)
 258 {
 259         switch(type->kind) {
 260         case TYPE_ERROR:
 261                 panic("error type occurred");
 262         case TYPE_ATOMIC:
 263                 return get_atomic_type_size(type->atomic.akind);
 264         case TYPE_COMPLEX:
 265                 return 2 * get_atomic_type_size(type->complex.akind);
 266         case TYPE_IMAGINARY:
 267                 return get_atomic_type_size(type->imaginary.akind);
 268         case TYPE_ENUM:
 269                 return get_atomic_type_size(type->enumt.akind);
 270         case TYPE_COMPOUND_UNION:
 271         case TYPE_COMPOUND_STRUCT:
 272                 return get_compound_type_size(&type->compound);
 273         case TYPE_FUNCTION:
 274                 /* just a pointer to the function */
 275                 return get_mode_size_bytes(mode_P_code);
 276         case TYPE_POINTER:
 277         case TYPE_REFERENCE:
 278                 return get_mode_size_bytes(mode_P_data);
 279         case TYPE_ARRAY:
 280                 return get_array_type_size(&type->array);
 281         case TYPE_BUILTIN:
 282                 return get_type_size_const(type->builtin.real_type);
 283         case TYPE_BITFIELD:
 284                 panic("type size of bitfield request");
 285         case TYPE_TYPEDEF:
 286         case TYPE_TYPEOF:
 287         case TYPE_INVALID:
 288                 break;
 289         }
 290         panic("Trying to determine size of invalid type");
 291 }
 292
 293 static ir_node *get_vla_size(array_type_t *const type)
 294 {
 295         ir_node *size_node = type->size_node;
 296         if (size_node == NULL) {
 297                 size_node = expression_to_firm(type->size_expression);
 298                 type->size_node = size_node;
 299         }
 300         return size_node;
 301 }
 302
 303 static ir_node *get_type_size(type_t *type)
 304 {
 305         type = skip_typeref(type);
 306
 307         if (is_type_array(type) && type->array.is_vla) {
 308                 ir_node *size_node = get_vla_size(&type->array);
 309                 ir_node *elem_size = get_type_size(type->array.element_type);
 310                 ir_mode *mode      = get_irn_mode(size_node);
 311                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 312                 return real_size;
 313         }
 314
 315         ir_mode *mode = get_ir_mode_storage(type_size_t);
 316         symconst_symbol sym;
 317         sym.type_p = get_ir_type(type);
 318         return new_SymConst(mode, sym, symconst_type_size);
 319 }
 320
 321 static unsigned count_parameters(const function_type_t *function_type)
 322 {
 323         unsigned count = 0;
 324
 325         function_parameter_t *parameter = function_type->parameters;
 326         for ( ; parameter != NULL; parameter = parameter->next) {
 327                 ++count;
 328         }
 329
 330         return count;
 331 }
 332
 333 static type_t *get_aligned_type(type_t *type, int alignment)
 334 {
 335         if (alignment == 0)
 336                 return type;
 337
 338         type = skip_typeref(type);
 339         if (alignment > type->base.alignment) {
 340                 type_t *copy         = duplicate_type(type);
 341                 copy->base.alignment = alignment;
 342                 type                 = identify_new_type(copy);
 343         }
 344         return type;
 345 }
 346
 347 /**
 348  * Creates a Firm type for an atomic type
 349  */
 350 static ir_type *create_atomic_type(atomic_type_kind_t akind, int alignment)
 351 {
 352         ir_mode            *mode   = atomic_modes[akind];
 353         ident              *id     = get_mode_ident(mode);
 354         ir_type            *irtype = new_type_primitive(id, mode);
 355
 356         set_type_alignment_bytes(irtype, alignment);
 357
 358         return irtype;
 359 }
 360
 361 /**
 362  * Creates a Firm type for a complex type
 363  */
 364 static ir_type *create_complex_type(const complex_type_t *type)
 365 {
 366         atomic_type_kind_t  kind = type->akind;
 367         ir_mode            *mode = atomic_modes[kind];
 368         ident              *id   = get_mode_ident(mode);
 369
 370         (void) id;
 371
 372         /* FIXME: finish the array */
 373         return NULL;
 374 }
 375
 376 /**
 377  * Creates a Firm type for an imaginary type
 378  */
 379 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 380 {
 381         atomic_type_kind_t  kind      = type->akind;
 382         ir_mode            *mode      = atomic_modes[kind];
 383         ident              *id        = get_mode_ident(mode);
 384         ir_type            *irtype    = new_type_primitive(id, mode);
 385
 386         set_type_alignment_bytes(irtype, type->base.alignment);
 387
 388         return irtype;
 389 }
 390
 391 /**
 392  * return type of a parameter (and take transparent union gnu extension into
 393  * account)
 394  */
 395 static type_t *get_parameter_type(type_t *type)
 396 {
 397         type = skip_typeref(type);
 398         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 399                 compound_t *compound = type->compound.compound;
 400                 type                 = compound->members.entities->declaration.type;
 401         }
 402
 403         return type;
 404 }
 405
 406 static ir_type *create_method_type(const function_type_t *function_type)
 407 {
 408         type_t  *return_type  = skip_typeref(function_type->return_type);
 409
 410         ident   *id           = id_unique("functiontype.%u");
 411         int      n_parameters = count_parameters(function_type);
 412         int      n_results    = return_type == type_void ? 0 : 1;
 413         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 414
 415         if (return_type != type_void) {
 416                 ir_type *restype = get_ir_type(return_type);
 417                 set_method_res_type(irtype, 0, restype);
 418         }
 419
 420         function_parameter_t *parameter = function_type->parameters;
 421         int                   n         = 0;
 422         for ( ; parameter != NULL; parameter = parameter->next) {
 423                 type_t  *type     = get_parameter_type(parameter->type);
 424                 ir_type *p_irtype = get_ir_type(type);
 425                 set_method_param_type(irtype, n, p_irtype);
 426                 ++n;
 427         }
 428
 429         if (function_type->variadic || function_type->unspecified_parameters) {
 430                 set_method_variadicity(irtype, variadicity_variadic);
 431         }
 432
 433         unsigned cc = get_method_calling_convention(irtype);
 434         switch (function_type->calling_convention) {
 435         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 436         case CC_CDECL:
 437 is_cdecl:
 438                 set_method_calling_convention(irtype, SET_CDECL(cc));
 439                 break;
 440
 441         case CC_STDCALL:
 442                 if (function_type->variadic || function_type->unspecified_parameters)
 443                         goto is_cdecl;
 444
 445                 /* only non-variadic function can use stdcall, else use cdecl */
 446                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 447                 break;
 448
 449         case CC_FASTCALL:
 450                 if (function_type->variadic || function_type->unspecified_parameters)
 451                         goto is_cdecl;
 452                 /* only non-variadic function can use fastcall, else use cdecl */
 453                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 454                 break;
 455
 456         case CC_THISCALL:
 457                 /* Hmm, leave default, not accepted by the parser yet. */
 458                 break;
 459         }
 460
 461         return irtype;
 462 }
 463
 464 static ir_type *create_pointer_type(pointer_type_t *type)
 465 {
 466         type_t   *points_to    = type->points_to;
 467         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 468         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 469                                                   ir_points_to, mode_P_data);
 470
 471         return ir_type;
 472 }
 473
 474 static ir_type *create_reference_type(reference_type_t *type)
 475 {
 476         type_t  *refers_to    = type->refers_to;
 477         ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
 478         ir_type *ir_type      = new_type_pointer(id_unique("reference.%u"),
 479                                                  ir_refers_to, mode_P_data);
 480
 481         return ir_type;
 482 }
 483
 484 static ir_type *create_array_type(array_type_t *type)
 485 {
 486         type_t  *element_type    = type->element_type;
 487         ir_type *ir_element_type = get_ir_type(element_type);
 488
 489         ident    *id      = id_unique("array.%u");
 490         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 491
 492         const int align = get_type_alignment_bytes(ir_element_type);
 493         set_type_alignment_bytes(ir_type, align);
 494
 495         if (type->size_constant) {
 496                 int n_elements = type->size;
 497
 498                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 499
 500                 size_t elemsize = get_type_size_bytes(ir_element_type);
 501                 if (elemsize % align > 0) {
 502                         elemsize += align - (elemsize % align);
 503                 }
 504                 set_type_size_bytes(ir_type, n_elements * elemsize);
 505         } else {
 506                 set_array_lower_bound_int(ir_type, 0, 0);
 507         }
 508         set_type_state(ir_type, layout_fixed);
 509
 510         return ir_type;
 511 }
 512
 513 /**
 514  * Return the signed integer type of size bits.
 515  *
 516  * @param size   the size
 517  */
 518 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 519                                                  unsigned size)
 520 {
 521         static ir_mode *s_modes[64 + 1] = {NULL, };
 522         ir_type *res;
 523         ir_mode *mode;
 524
 525         if (size <= 0 || size > 64)
 526                 return NULL;
 527
 528         mode = s_modes[size];
 529         if (mode == NULL) {
 530                 char name[32];
 531
 532                 snprintf(name, sizeof(name), "bf_I%u", size);
 533                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 534                                    size <= 32 ? 32 : size );
 535                 s_modes[size] = mode;
 536         }
 537
 538         char name[32];
 539         snprintf(name, sizeof(name), "I%u", size);
 540         ident *id = new_id_from_str(name);
 541         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 542         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 543         set_primitive_base_type(res, base_tp);
 544
 545         return res;
 546 }
 547
 548 /**
 549  * Return the unsigned integer type of size bits.
 550  *
 551  * @param size   the size
 552  */
 553 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 554                                                    unsigned size)
 555 {
 556         static ir_mode *u_modes[64 + 1] = {NULL, };
 557         ir_type *res;
 558         ir_mode *mode;
 559
 560         if (size <= 0 || size > 64)
 561                 return NULL;
 562
 563         mode = u_modes[size];
 564         if (mode == NULL) {
 565                 char name[32];
 566
 567                 snprintf(name, sizeof(name), "bf_U%u", size);
 568                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 569                                    size <= 32 ? 32 : size );
 570                 u_modes[size] = mode;
 571         }
 572
 573         char name[32];
 574
 575         snprintf(name, sizeof(name), "U%u", size);
 576         ident *id = new_id_from_str(name);
 577         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 578         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 579         set_primitive_base_type(res, base_tp);
 580
 581         return res;
 582 }
 583
 584 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 585 {
 586         type_t *base = skip_typeref(type->base_type);
 587         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 588         ir_type *irbase = get_ir_type(base);
 589
 590         unsigned size = type->bit_size;
 591
 592         assert(!is_type_float(base));
 593         if (is_type_signed(base)) {
 594                 return get_signed_int_type_for_bit_size(irbase, size);
 595         } else {
 596                 return get_unsigned_int_type_for_bit_size(irbase, size);
 597         }
 598 }
 599
 600 #define INVALID_TYPE ((ir_type_ptr)-1)
 601
 602 enum {
 603         COMPOUND_IS_STRUCT = false,
 604         COMPOUND_IS_UNION  = true
 605 };
 606
 607 /**
 608  * Construct firm type from ast struct type.
 609  *
 610  * As anonymous inner structs get flattened to a single firm type, we might get
 611  * irtype, outer_offset and out_align passed (they represent the position of
 612  * the anonymous inner struct inside the resulting firm struct)
 613  */
 614 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 615                                      size_t *outer_offset, size_t *outer_align,
 616                                      bool incomplete, bool is_union)
 617 {
 618         compound_t *compound = type->compound;
 619
 620         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 621                 return compound->irtype;
 622         }
 623
 624         size_t align_all  = 1;
 625         size_t offset     = 0;
 626         size_t bit_offset = 0;
 627         size_t size       = 0;
 628
 629         if (irtype == NULL) {
 630                 symbol_t *symbol = compound->base.symbol;
 631                 ident    *id;
 632                 if (symbol != NULL) {
 633                         id = new_id_from_str(symbol->string);
 634                 } else {
 635                         if (is_union) {
 636                                 id = id_unique("__anonymous_union.%u");
 637                         } else {
 638                                 id = id_unique("__anonymous_struct.%u");
 639                         }
 640                 }
 641                 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 642
 643                 if (is_union) {
 644                         irtype = new_d_type_union(id, dbgi);
 645                 } else {
 646                         irtype = new_d_type_struct(id, dbgi);
 647                 }
 648
 649                 compound->irtype_complete = false;
 650                 compound->irtype          = irtype;
 651         } else {
 652                 offset    = *outer_offset;
 653                 align_all = *outer_align;
 654         }
 655
 656         if (incomplete)
 657                 return irtype;
 658
 659         compound->irtype_complete = true;
 660
 661         entity_t *entry = compound->members.entities;
 662         for ( ; entry != NULL; entry = entry->base.next) {
 663                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 664                         continue;
 665
 666                 size_t prev_offset = offset;
 667
 668                 symbol_t *symbol     = entry->base.symbol;
 669                 type_t   *entry_type = skip_typeref(entry->declaration.type);
 670                 entry_type
 671                         = get_aligned_type(entry_type, entry->compound_member.alignment);
 672                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 673
 674                 ident    *ident;
 675                 if (symbol != NULL) {
 676                         ident = new_id_from_str(symbol->string);
 677                 } else {
 678                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 679                                 create_compound_type(&entry_type->compound, irtype, &offset,
 680                                                      &align_all, false, COMPOUND_IS_STRUCT);
 681                                 goto finished_member;
 682                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 683                                 create_compound_type(&entry_type->compound, irtype, &offset,
 684                                                      &align_all, false, COMPOUND_IS_UNION);
 685                                 goto finished_member;
 686                         } else {
 687                                 assert(entry_type->kind == TYPE_BITFIELD);
 688                         }
 689                         ident = id_unique("anon.%u");
 690                 }
 691
 692                 ir_type *base_irtype;
 693                 if (entry_type->kind == TYPE_BITFIELD) {
 694                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 695                 } else {
 696                         base_irtype = get_ir_type(entry_type);
 697                 }
 698
 699                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 700                 size_t misalign        = offset % entry_alignment;
 701
 702                 ir_type   *entry_irtype = get_ir_type(entry_type);
 703                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 704
 705                 size_t base;
 706                 size_t bits_remainder;
 707                 if (entry_type->kind == TYPE_BITFIELD) {
 708                         size_t size_bits      = entry_type->bitfield.bit_size;
 709                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 710
 711                         if (size_bits > rest_size_bits) {
 712                                 /* start a new bucket */
 713                                 offset     += entry_alignment - misalign;
 714                                 bit_offset  = 0;
 715
 716                                 base           = offset;
 717                                 bits_remainder = 0;
 718                         } else {
 719                                 /* put into current bucket */
 720                                 base           = offset - misalign;
 721                                 bits_remainder = misalign * 8 + bit_offset;
 722                         }
 723
 724                         offset     += size_bits / 8;
 725                         bit_offset  = bit_offset + (size_bits % 8);
 726                 } else {
 727                         size_t entry_size = get_type_size_bytes(base_irtype);
 728                         if (misalign > 0 || bit_offset > 0)
 729                                 offset += entry_alignment - misalign;
 730
 731                         base           = offset;
 732                         bits_remainder = 0;
 733                         offset        += entry_size;
 734                         bit_offset     = 0;
 735                 }
 736
 737                 if (entry_alignment > align_all) {
 738                         if (entry_alignment % align_all != 0) {
 739                                 panic("uneven alignments not supported yet");
 740                         }
 741                         align_all = entry_alignment;
 742                 }
 743
 744                 set_entity_offset(entity, base);
 745                 set_entity_offset_bits_remainder(entity,
 746                                                  (unsigned char) bits_remainder);
 747                 //add_struct_member(irtype, entity);
 748                 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
 749                 assert(entry->compound_member.entity == NULL);
 750                 entry->compound_member.entity = entity;
 751
 752 finished_member:
 753                 if (is_union) {
 754                         size_t entry_size = offset - prev_offset;
 755                         if (entry_size > size) {
 756                                 size = entry_size;
 757                         }
 758                         offset     = 0;
 759                         bit_offset = 0;
 760                 }
 761         }
 762
 763         if (!is_union) {
 764                 size = offset;
 765         }
 766
 767         size_t misalign = offset % align_all;
 768         if (misalign > 0 || bit_offset > 0) {
 769                 size += align_all - misalign;
 770         }
 771
 772         if (outer_offset != NULL) {
 773                 if (!is_union) {
 774                         *outer_offset = offset;
 775                 } else {
 776                         *outer_offset += size;
 777                 }
 778
 779                 if (align_all > *outer_align) {
 780                         if (align_all % *outer_align != 0) {
 781                                 panic("uneven alignments not supported yet");
 782                         }
 783                         *outer_align = align_all;
 784                 }
 785         } else {
 786                 set_type_alignment_bytes(irtype, align_all);
 787                 set_type_size_bytes(irtype, size);
 788                 set_type_state(irtype, layout_fixed);
 789         }
 790
 791         return irtype;
 792 }
 793
 794 static ir_type *create_enum_type(enum_type_t *const type)
 795 {
 796         type->base.firm_type = ir_type_int;
 797
 798         ir_mode *const mode    = mode_int;
 799         tarval  *const one     = get_mode_one(mode);
 800         tarval  *      tv_next = get_tarval_null(mode);
 801
 802         bool constant_folding_old = constant_folding;
 803         constant_folding = true;
 804
 805         enum_t   *enume = type->enume;
 806         entity_t *entry = enume->base.next;
 807         for (; entry != NULL; entry = entry->base.next) {
 808                 if (entry->kind != ENTITY_ENUM_VALUE)
 809                         break;
 810
 811                 expression_t *const init = entry->enum_value.value;
 812                 if (init != NULL) {
 813                         ir_node *const cnst = expression_to_firm(init);
 814                         if (!is_Const(cnst)) {
 815                                 panic("couldn't fold constant");
 816                         }
 817                         tv_next = get_Const_tarval(cnst);
 818                 }
 819                 entry->enum_value.tv = tv_next;
 820                 tv_next = tarval_add(tv_next, one);
 821         }
 822
 823         constant_folding = constant_folding_old;
 824
 825         return create_atomic_type(type->akind, type->base.alignment);
 826 }
 827
 828 static ir_type *get_ir_type_incomplete(type_t *type)
 829 {
 830         assert(type != NULL);
 831         type = skip_typeref(type);
 832
 833         if (type->base.firm_type != NULL) {
 834                 assert(type->base.firm_type != INVALID_TYPE);
 835                 return type->base.firm_type;
 836         }
 837
 838         switch (type->kind) {
 839         case TYPE_COMPOUND_STRUCT:
 840                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 841                                             true, COMPOUND_IS_STRUCT);
 842         case TYPE_COMPOUND_UNION:
 843                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 844                                             true, COMPOUND_IS_UNION);
 845         default:
 846                 return get_ir_type(type);
 847         }
 848 }
 849
 850 ir_type *get_ir_type(type_t *type)
 851 {
 852         assert(type != NULL);
 853
 854         type = skip_typeref(type);
 855
 856         if (type->base.firm_type != NULL) {
 857                 assert(type->base.firm_type != INVALID_TYPE);
 858                 return type->base.firm_type;
 859         }
 860
 861         ir_type *firm_type = NULL;
 862         switch (type->kind) {
 863         case TYPE_ERROR:
 864                 /* Happens while constant folding, when there was an error */
 865                 return create_atomic_type(ATOMIC_TYPE_VOID, 0);
 866
 867         case TYPE_ATOMIC:
 868                 firm_type = create_atomic_type(type->atomic.akind,
 869                                                type->base.alignment);
 870                 break;
 871         case TYPE_COMPLEX:
 872                 firm_type = create_complex_type(&type->complex);
 873                 break;
 874         case TYPE_IMAGINARY:
 875                 firm_type = create_imaginary_type(&type->imaginary);
 876                 break;
 877         case TYPE_FUNCTION:
 878                 firm_type = create_method_type(&type->function);
 879                 break;
 880         case TYPE_POINTER:
 881                 firm_type = create_pointer_type(&type->pointer);
 882                 break;
 883         case TYPE_REFERENCE:
 884                 firm_type = create_reference_type(&type->reference);
 885                 break;
 886         case TYPE_ARRAY:
 887                 firm_type = create_array_type(&type->array);
 888                 break;
 889         case TYPE_COMPOUND_STRUCT:
 890                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 891                                                  false, COMPOUND_IS_STRUCT);
 892                 break;
 893         case TYPE_COMPOUND_UNION:
 894                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 895                                                  false, COMPOUND_IS_UNION);
 896                 break;
 897         case TYPE_ENUM:
 898                 firm_type = create_enum_type(&type->enumt);
 899                 break;
 900         case TYPE_BUILTIN:
 901                 firm_type = get_ir_type(type->builtin.real_type);
 902                 break;
 903         case TYPE_BITFIELD:
 904                 firm_type = create_bitfield_type(&type->bitfield);
 905                 break;
 906
 907         case TYPE_TYPEOF:
 908         case TYPE_TYPEDEF:
 909         case TYPE_INVALID:
 910                 break;
 911         }
 912         if (firm_type == NULL)
 913                 panic("unknown type found");
 914
 915         type->base.firm_type = firm_type;
 916         return firm_type;
 917 }
 918
 919 static ir_mode *get_ir_mode_storage(type_t *type)
 920 {
 921         ir_type *irtype = get_ir_type(type);
 922
 923         /* firm doesn't report a mode for arrays somehow... */
 924         if (is_Array_type(irtype)) {
 925                 return mode_P_data;
 926         }
 927
 928         ir_mode *mode = get_type_mode(irtype);
 929         assert(mode != NULL);
 930         return mode;
 931 }
 932
 933 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 934 {
 935         ir_mode *mode = get_ir_mode_storage(type);
 936         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 937                 return mode_float_arithmetic;
 938         }
 939
 940         return mode;
 941 }
 942
 943 /** Names of the runtime functions. */
 944 static const struct {
 945         int        id;           /**< the rts id */
 946         int        n_res;        /**< number of return values */
 947         const char *name;        /**< the name of the rts function */
 948         int        n_params;     /**< number of parameters */
 949         unsigned   flags;        /**< language flags */
 950 } rts_data[] = {
 951         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 952         { rts_abort,      0, "abort",        0, _C89 },
 953         { rts_alloca,     1, "alloca",       1, _ALL },
 954         { rts_abs,        1, "abs",          1, _C89 },
 955         { rts_labs,       1, "labs",         1, _C89 },
 956         { rts_llabs,      1, "llabs",        1, _C99 },
 957         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 958
 959         { rts_fabs,       1, "fabs",         1, _C89 },
 960         { rts_sqrt,       1, "sqrt",         1, _C89 },
 961         { rts_cbrt,       1, "cbrt",         1, _C99 },
 962         { rts_exp,        1, "exp",          1, _C89 },
 963         { rts_exp2,       1, "exp2",         1, _C89 },
 964         { rts_exp10,      1, "exp10",        1, _GNUC },
 965         { rts_log,        1, "log",          1, _C89 },
 966         { rts_log2,       1, "log2",         1, _C89 },
 967         { rts_log10,      1, "log10",        1, _C89 },
 968         { rts_pow,        1, "pow",          2, _C89 },
 969         { rts_sin,        1, "sin",          1, _C89 },
 970         { rts_cos,        1, "cos",          1, _C89 },
 971         { rts_tan,        1, "tan",          1, _C89 },
 972         { rts_asin,       1, "asin",         1, _C89 },
 973         { rts_acos,       1, "acos",         1, _C89 },
 974         { rts_atan,       1, "atan",         1, _C89 },
 975         { rts_sinh,       1, "sinh",         1, _C89 },
 976         { rts_cosh,       1, "cosh",         1, _C89 },
 977         { rts_tanh,       1, "tanh",         1, _C89 },
 978
 979         { rts_fabsf,      1, "fabsf",        1, _C99 },
 980         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 981         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 982         { rts_expf,       1, "expf",         1, _C99 },
 983         { rts_exp2f,      1, "exp2f",        1, _C99 },
 984         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 985         { rts_logf,       1, "logf",         1, _C99 },
 986         { rts_log2f,      1, "log2f",        1, _C99 },
 987         { rts_log10f,     1, "log10f",       1, _C99 },
 988         { rts_powf,       1, "powf",         2, _C99 },
 989         { rts_sinf,       1, "sinf",         1, _C99 },
 990         { rts_cosf,       1, "cosf",         1, _C99 },
 991         { rts_tanf,       1, "tanf",         1, _C99 },
 992         { rts_asinf,      1, "asinf",        1, _C99 },
 993         { rts_acosf,      1, "acosf",        1, _C99 },
 994         { rts_atanf,      1, "atanf",        1, _C99 },
 995         { rts_sinhf,      1, "sinhf",        1, _C99 },
 996         { rts_coshf,      1, "coshf",        1, _C99 },
 997         { rts_tanhf,      1, "tanhf",        1, _C99 },
 998
 999         { rts_fabsl,      1, "fabsl",        1, _C99 },
1000         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
1001         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
1002         { rts_expl,       1, "expl",         1, _C99 },
1003         { rts_exp2l,      1, "exp2l",        1, _C99 },
1004         { rts_exp10l,     1, "exp10l",       1, _GNUC },
1005         { rts_logl,       1, "logl",         1, _C99 },
1006         { rts_log2l,      1, "log2l",        1, _C99 },
1007         { rts_log10l,     1, "log10l",       1, _C99 },
1008         { rts_powl,       1, "powl",         2, _C99 },
1009         { rts_sinl,       1, "sinl",         1, _C99 },
1010         { rts_cosl,       1, "cosl",         1, _C99 },
1011         { rts_tanl,       1, "tanl",         1, _C99 },
1012         { rts_asinl,      1, "asinl",        1, _C99 },
1013         { rts_acosl,      1, "acosl",        1, _C99 },
1014         { rts_atanl,      1, "atanl",        1, _C99 },
1015         { rts_sinhl,      1, "sinhl",        1, _C99 },
1016         { rts_coshl,      1, "coshl",        1, _C99 },
1017         { rts_tanhl,      1, "tanhl",        1, _C99 },
1018
1019         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
1020         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
1021         { rts_strcmp,     1, "strcmp",       2, _C89 },
1022         { rts_strncmp,    1, "strncmp",      3, _C89 }
1023 };
1024
1025 static ident *rts_idents[lengthof(rts_data)];
1026
1027 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
1028
1029 /**
1030  * Handle GNU attributes for entities
1031  *
1032  * @param ent   the entity
1033  * @param decl  the routine declaration
1034  */
1035 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
1036 {
1037         assert(is_declaration(entity));
1038         decl_modifiers_t modifiers = entity->declaration.modifiers;
1039         if (modifiers & DM_PURE) {
1040                 /* TRUE if the declaration includes the GNU
1041                    __attribute__((pure)) specifier. */
1042                 set_entity_additional_property(irentity, mtp_property_pure);
1043         }
1044         if (modifiers & DM_CONST) {
1045                 set_entity_additional_property(irentity, mtp_property_const);
1046                 have_const_functions = true;
1047         }
1048         if (modifiers & DM_USED) {
1049                 /* TRUE if the declaration includes the GNU
1050                    __attribute__((used)) specifier. */
1051                 set_entity_stickyness(irentity, stickyness_sticky);
1052         }
1053 }
1054
1055 static bool is_main(entity_t *entity)
1056 {
1057         static symbol_t *sym_main = NULL;
1058         if (sym_main == NULL) {
1059                 sym_main = symbol_table_insert("main");
1060         }
1061
1062         if (entity->base.symbol != sym_main)
1063                 return false;
1064         /* must be in outermost scope */
1065         if (entity->base.parent_scope != &current_translation_unit->scope)
1066                 return false;
1067
1068         return true;
1069 }
1070
1071 /**
1072  * Creates an entity representing a function.
1073  *
1074  * @param declaration  the function declaration
1075  */
1076 static ir_entity *get_function_entity(entity_t *entity)
1077 {
1078         assert(entity->kind == ENTITY_FUNCTION);
1079         if (entity->function.entity != NULL) {
1080                 return entity->function.entity;
1081         }
1082
1083         if (is_main(entity)) {
1084                 /* force main to C linkage */
1085                 type_t *type = entity->declaration.type;
1086                 assert(is_type_function(type));
1087                 if (type->function.linkage != LINKAGE_C) {
1088                         type_t *new_type           = duplicate_type(type);
1089                         new_type->function.linkage = LINKAGE_C;
1090                         type                       = identify_new_type(new_type);
1091                         entity->declaration.type   = type;
1092                 }
1093         }
1094
1095         symbol_t *symbol = entity->base.symbol;
1096         ident    *id     = new_id_from_str(symbol->string);
1097
1098         ir_type   *global_type    = get_glob_type();
1099         ir_type   *ir_type_method = get_ir_type(entity->declaration.type);
1100         bool const has_body       = entity->function.statement != NULL;
1101
1102         /* already an entity defined? */
1103         ir_entity *irentity = entitymap_get(&entitymap, symbol);
1104         if (irentity != NULL) {
1105                 if (get_entity_visibility(irentity) == visibility_external_allocated
1106                                 && has_body) {
1107                         set_entity_visibility(irentity, visibility_external_visible);
1108                 }
1109                 goto entity_created;
1110         }
1111
1112         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1113         irentity             = new_d_entity(global_type, id, ir_type_method, dbgi);
1114         set_entity_ld_ident(irentity, create_ld_ident(entity));
1115
1116         handle_gnu_attributes_ent(irentity, entity);
1117
1118         /* static inline             => local
1119          * extern inline             => local
1120          * inline without definition => local
1121          * inline with definition    => external_visible */
1122         storage_class_tag_t const storage_class
1123                 = (storage_class_tag_t) entity->declaration.storage_class;
1124         bool                const is_inline     = entity->function.is_inline;
1125         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1126                 set_entity_visibility(irentity, visibility_external_visible);
1127         } else if (storage_class == STORAGE_CLASS_STATIC ||
1128                    (is_inline && has_body)) {
1129                 if (!has_body) {
1130                         /* this entity was declared, but is defined nowhere */
1131                         set_entity_peculiarity(irentity, peculiarity_description);
1132                 }
1133                 set_entity_visibility(irentity, visibility_local);
1134         } else if (has_body) {
1135                 set_entity_visibility(irentity, visibility_external_visible);
1136         } else {
1137                 set_entity_visibility(irentity, visibility_external_allocated);
1138         }
1139         set_entity_allocation(irentity, allocation_static);
1140
1141         /* We should check for file scope here, but as long as we compile C only
1142            this is not needed. */
1143         if (! firm_opt.freestanding) {
1144                 /* check for a known runtime function */
1145                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1146                         if (id != rts_idents[i])
1147                                 continue;
1148
1149                         /* ignore those rts functions not necessary needed for current mode */
1150                         if ((c_mode & rts_data[i].flags) == 0)
1151                                 continue;
1152                         assert(rts_entities[rts_data[i].id] == NULL);
1153                         rts_entities[rts_data[i].id] = irentity;
1154                 }
1155         }
1156
1157         entitymap_insert(&entitymap, symbol, irentity);
1158
1159 entity_created:
1160         entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1161         entity->function.entity  = irentity;
1162
1163         return irentity;
1164 }
1165
1166 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1167 {
1168         ir_mode *value_mode = get_irn_mode(value);
1169
1170         if (value_mode == dest_mode || is_Bad(value))
1171                 return value;
1172
1173         if (dest_mode == mode_b) {
1174                 ir_node *zero = new_Const(get_mode_null(value_mode));
1175                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1176                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1177                 return proj;
1178         }
1179
1180         return new_d_Conv(dbgi, value, dest_mode);
1181 }
1182
1183 /**
1184  * Creates a Const node representing a constant.
1185  */
1186 static ir_node *const_to_firm(const const_expression_t *cnst)
1187 {
1188         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1189         type_t   *type = skip_typeref(cnst->base.type);
1190         ir_mode  *mode = get_ir_mode_storage(type);
1191
1192         char    buf[128];
1193         tarval *tv;
1194         size_t  len;
1195         if (mode_is_float(mode)) {
1196                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1197         } else {
1198                 if (mode_is_signed(mode)) {
1199                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1200                 } else {
1201                         len = snprintf(buf, sizeof(buf), "%llu",
1202                                        (unsigned long long) cnst->v.int_value);
1203                 }
1204                 tv = new_tarval_from_str(buf, len, mode);
1205         }
1206
1207         ir_node *res        = new_d_Const(dbgi, tv);
1208         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1209         return create_conv(dbgi, res, mode_arith);
1210 }
1211
1212 /**
1213  * Creates a Const node representing a character constant.
1214  */
1215 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1216 {
1217         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1218         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1219
1220         long long int v;
1221         size_t const  size = cnst->v.character.size;
1222         if (size == 1 && char_is_signed) {
1223                 v = (signed char)cnst->v.character.begin[0];
1224         } else {
1225                 v = 0;
1226                 for (size_t i = 0; i < size; ++i) {
1227                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1228                 }
1229         }
1230         char    buf[128];
1231         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1232         tarval *tv = new_tarval_from_str(buf, len, mode);
1233
1234         return new_d_Const(dbgi, tv);
1235 }
1236
1237 /**
1238  * Creates a Const node representing a wide character constant.
1239  */
1240 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1241 {
1242         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1243         ir_mode  *mode = get_ir_mode_arithmetic(cnst->base.type);
1244
1245         long long int v = cnst->v.wide_character.begin[0];
1246
1247         char    buf[128];
1248         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1249         tarval *tv = new_tarval_from_str(buf, len, mode);
1250
1251         return new_d_Const(dbgi, tv);
1252 }
1253
1254 /**
1255  * Creates a SymConst for a given entity.
1256  *
1257  * @param dbgi    debug info
1258  * @param mode    the (reference) mode for the SymConst
1259  * @param entity  the entity
1260  */
1261 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1262                               ir_entity *entity)
1263 {
1264         assert(entity != NULL);
1265         union symconst_symbol sym;
1266         sym.entity_p = entity;
1267         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1268 }
1269
1270 /**
1271  * Creates a SymConst node representing a string constant.
1272  *
1273  * @param src_pos    the source position of the string constant
1274  * @param id_prefix  a prefix for the name of the generated string constant
1275  * @param value      the value of the string constant
1276  */
1277 static ir_node *string_to_firm(const source_position_t *const src_pos,
1278                                const char *const id_prefix,
1279                                const string_t *const value)
1280 {
1281         ir_type  *const global_type = get_glob_type();
1282         dbg_info *const dbgi        = get_dbg_info(src_pos);
1283         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1284                                                        ir_type_const_char, dbgi);
1285
1286         ident     *const id     = id_unique(id_prefix);
1287         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1288         set_entity_ld_ident(entity, id);
1289         set_entity_variability(entity, variability_constant);
1290         set_entity_allocation(entity, allocation_static);
1291
1292         ir_type *const elem_type = ir_type_const_char;
1293         ir_mode *const mode      = get_type_mode(elem_type);
1294
1295         const char* const string = value->begin;
1296         const size_t      slen   = value->size;
1297
1298         set_array_lower_bound_int(type, 0, 0);
1299         set_array_upper_bound_int(type, 0, slen);
1300         set_type_size_bytes(type, slen);
1301         set_type_state(type, layout_fixed);
1302
1303         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1304         for (size_t i = 0; i < slen; ++i) {
1305                 tvs[i] = new_tarval_from_long(string[i], mode);
1306         }
1307
1308         set_array_entity_values(entity, tvs, slen);
1309         free(tvs);
1310
1311         return create_symconst(dbgi, mode_P_data, entity);
1312 }
1313
1314 /**
1315  * Creates a SymConst node representing a string literal.
1316  *
1317  * @param literal   the string literal
1318  */
1319 static ir_node *string_literal_to_firm(
1320                 const string_literal_expression_t* literal)
1321 {
1322         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1323                               &literal->value);
1324 }
1325
1326 /**
1327  * Creates a SymConst node representing a wide string literal.
1328  *
1329  * @param literal   the wide string literal
1330  */
1331 static ir_node *wide_string_literal_to_firm(
1332         const wide_string_literal_expression_t* const literal)
1333 {
1334         ir_type *const global_type = get_glob_type();
1335         ir_type *const elem_type   = ir_type_wchar_t;
1336         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1337         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1338                                                     elem_type, dbgi);
1339
1340         ident     *const id     = id_unique("Lstr.%u");
1341         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1342         set_entity_ld_ident(entity, id);
1343         set_entity_variability(entity, variability_constant);
1344         set_entity_allocation(entity, allocation_static);
1345
1346         ir_mode *const mode      = get_type_mode(elem_type);
1347
1348         const wchar_rep_t *const string = literal->value.begin;
1349         const size_t             slen   = literal->value.size;
1350
1351         set_array_lower_bound_int(type, 0, 0);
1352         set_array_upper_bound_int(type, 0, slen);
1353         set_type_size_bytes(type, slen);
1354         set_type_state(type, layout_fixed);
1355
1356         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1357         for (size_t i = 0; i < slen; ++i) {
1358                 tvs[i] = new_tarval_from_long(string[i], mode);
1359         }
1360
1361         set_array_entity_values(entity, tvs, slen);
1362         free(tvs);
1363
1364         return create_symconst(dbgi, mode_P_data, entity);
1365 }
1366
1367 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1368                                       ir_node *const addr)
1369 {
1370         ir_type *irtype = get_ir_type(type);
1371         if (is_compound_type(irtype)
1372                         || is_Method_type(irtype)
1373                         || is_Array_type(irtype)) {
1374                 return addr;
1375         }
1376
1377         ir_cons_flags  flags    = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1378                                   ? cons_volatile : cons_none;
1379         ir_mode *const mode     = get_type_mode(irtype);
1380         ir_node *const memory   = get_store();
1381         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1382         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1383         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1384
1385         set_store(load_mem);
1386
1387         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1388         return create_conv(dbgi, load_res, mode_arithmetic);
1389 }
1390
1391 /**
1392  * Creates a strict Conv if necessary.
1393  */
1394 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1395 {
1396         ir_mode *mode = get_irn_mode(node);
1397
1398         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1399                 return node;
1400         if (!mode_is_float(mode))
1401                 return node;
1402
1403         /* check if there is already a Conv */
1404         if (is_Conv(node)) {
1405                 /* convert it into a strict Conv */
1406                 set_Conv_strict(node, 1);
1407                 return node;
1408         }
1409
1410         /* otherwise create a new one */
1411         return new_d_strictConv(dbgi, node, mode);
1412 }
1413
1414 static ir_node *get_global_var_address(dbg_info *const dbgi,
1415                                        const entity_t *const entity)
1416 {
1417         assert(entity->kind == ENTITY_VARIABLE);
1418         assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1419
1420         ir_entity *const irentity = entity->variable.v.entity;
1421         if (entity->variable.thread_local) {
1422                 ir_node *const no_mem = new_NoMem();
1423                 ir_node *const tls    = get_irg_tls(current_ir_graph);
1424                 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1425         } else {
1426                 return create_symconst(dbgi, mode_P_data, irentity);
1427         }
1428 }
1429
1430 /**
1431  * Returns the correct base address depending on whether it is a parameter or a
1432  * normal local variable.
1433  */
1434 static ir_node *get_local_frame(ir_entity *const ent)
1435 {
1436         ir_graph      *const irg   = current_ir_graph;
1437         const ir_type *const owner = get_entity_owner(ent);
1438         if (owner == get_irg_frame_type(irg)) {
1439                 return get_irg_frame(irg);
1440         } else {
1441                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1442                 return get_irg_value_param_base(irg);
1443         }
1444 }
1445
1446 /**
1447  * Keep all memory edges of the given block.
1448  */
1449 static void keep_all_memory(ir_node *block)
1450 {
1451         ir_node *old = get_cur_block();
1452
1453         set_cur_block(block);
1454         keep_alive(get_store());
1455         /* TODO: keep all memory edges from restricted pointers */
1456         set_cur_block(old);
1457 }
1458
1459 static ir_node *reference_expression_enum_value_to_firm(
1460                 const reference_expression_t *ref)
1461 {
1462         entity_t *entity = ref->entity;
1463         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1464         /* make sure the type is constructed */
1465         (void) get_ir_type(type);
1466
1467         return new_Const(entity->enum_value.tv);
1468 }
1469
1470 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1471 {
1472         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1473         entity_t *entity = ref->entity;
1474         assert(is_declaration(entity));
1475         type_t   *type   = skip_typeref(entity->declaration.type);
1476
1477         /* make sure the type is constructed */
1478         (void) get_ir_type(type);
1479
1480         switch ((declaration_kind_t) entity->declaration.kind) {
1481         case DECLARATION_KIND_UNKNOWN:
1482                 break;
1483
1484         case DECLARATION_KIND_LOCAL_VARIABLE: {
1485                 ir_mode *const mode  = get_ir_mode_storage(type);
1486                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1487                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1488         }
1489         case DECLARATION_KIND_PARAMETER: {
1490                 ir_mode *const mode  = get_ir_mode_storage(type);
1491                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1492                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1493         }
1494         case DECLARATION_KIND_FUNCTION: {
1495                 ir_mode *const mode = get_ir_mode_storage(type);
1496                 return create_symconst(dbgi, mode, entity->function.entity);
1497         }
1498         case DECLARATION_KIND_INNER_FUNCTION: {
1499                 ir_mode *const mode = get_ir_mode_storage(type);
1500                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1501                         /* inner function not using the closure */
1502                         return create_symconst(dbgi, mode, entity->function.entity);
1503                 } else {
1504                         /* TODO: need trampoline here */
1505                         panic("Trampoline code not implemented");
1506                         return create_symconst(dbgi, mode, entity->function.entity);
1507                 }
1508         }
1509         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1510                 ir_node *const addr = get_global_var_address(dbgi, entity);
1511                 return deref_address(dbgi, entity->declaration.type, addr);
1512         }
1513
1514         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1515                 ir_entity *irentity = entity->variable.v.entity;
1516                 ir_node   *frame    = get_local_frame(irentity);
1517                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1518                 return deref_address(dbgi, entity->declaration.type, sel);
1519         }
1520         case DECLARATION_KIND_PARAMETER_ENTITY: {
1521                 ir_entity *irentity = entity->parameter.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
1527         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1528                 return entity->variable.v.vla_base;
1529
1530         case DECLARATION_KIND_COMPOUND_MEMBER:
1531                 panic("not implemented reference type");
1532         }
1533
1534         panic("reference to declaration with unknown type found");
1535 }
1536
1537 static ir_node *reference_addr(const reference_expression_t *ref)
1538 {
1539         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1540         entity_t *entity = ref->entity;
1541         assert(is_declaration(entity));
1542
1543         switch((declaration_kind_t) entity->declaration.kind) {
1544         case DECLARATION_KIND_UNKNOWN:
1545                 break;
1546         case DECLARATION_KIND_PARAMETER:
1547         case DECLARATION_KIND_LOCAL_VARIABLE:
1548                 /* you can store to a local variable (so we don't panic but return NULL
1549                  * as an indicator for no real address) */
1550                 return NULL;
1551         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1552                 ir_node *const addr = get_global_var_address(dbgi, entity);
1553                 return addr;
1554         }
1555         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1556                 ir_entity *irentity = entity->variable.v.entity;
1557                 ir_node   *frame    = get_local_frame(irentity);
1558                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1559
1560                 return sel;
1561         }
1562         case DECLARATION_KIND_PARAMETER_ENTITY: {
1563                 ir_entity *irentity = entity->parameter.v.entity;
1564                 ir_node   *frame    = get_local_frame(irentity);
1565                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1566
1567                 return sel;
1568         }
1569
1570         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1571                 return entity->variable.v.vla_base;
1572
1573         case DECLARATION_KIND_FUNCTION: {
1574                 type_t  *const type = skip_typeref(entity->declaration.type);
1575                 ir_mode *const mode = get_ir_mode_storage(type);
1576                 return create_symconst(dbgi, mode, entity->function.entity);
1577         }
1578
1579         case DECLARATION_KIND_INNER_FUNCTION:
1580         case DECLARATION_KIND_COMPOUND_MEMBER:
1581                 panic("not implemented reference type");
1582         }
1583
1584         panic("reference to declaration with unknown type found");
1585 }
1586
1587 /**
1588  * Transform calls to builtin functions.
1589  */
1590 static ir_node *process_builtin_call(const call_expression_t *call)
1591 {
1592         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1593
1594         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1595         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1596
1597         type_t *type = skip_typeref(builtin->base.type);
1598         assert(is_type_pointer(type));
1599
1600         type_t   *function_type = skip_typeref(type->pointer.points_to);
1601         symbol_t *symbol        = builtin->symbol;
1602
1603         switch(symbol->ID) {
1604         case T___builtin_alloca: {
1605                 if (call->arguments == NULL || call->arguments->next != NULL) {
1606                         panic("invalid number of parameters on __builtin_alloca");
1607                 }
1608                 expression_t *argument = call->arguments->expression;
1609                 ir_node      *size     = expression_to_firm(argument);
1610
1611                 ir_node *store  = get_store();
1612                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1613                                               stack_alloc);
1614                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1615                 set_store(proj_m);
1616                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1617
1618                 return res;
1619         }
1620
1621         case T___builtin_huge_val:
1622         case T___builtin_inf:
1623         case T___builtin_inff:
1624         case T___builtin_infl: {
1625                 type_t  *type = function_type->function.return_type;
1626                 ir_mode *mode = get_ir_mode_arithmetic(type);
1627                 tarval  *tv   = get_mode_infinite(mode);
1628                 ir_node *res  = new_d_Const(dbgi, tv);
1629                 return   res;
1630         }
1631         case T___builtin_nan:
1632         case T___builtin_nanf:
1633         case T___builtin_nanl: {
1634                 /* Ignore string for now... */
1635                 assert(is_type_function(function_type));
1636                 type_t  *type = function_type->function.return_type;
1637                 ir_mode *mode = get_ir_mode_arithmetic(type);
1638                 tarval  *tv   = get_mode_NAN(mode);
1639                 ir_node *res  = new_d_Const(dbgi, tv);
1640                 return res;
1641         }
1642         case T___builtin_expect: {
1643                 expression_t *argument = call->arguments->expression;
1644                 return _expression_to_firm(argument);
1645         }
1646         case T___builtin_va_end:
1647                 /* evaluate the argument of va_end for its side effects */
1648                 _expression_to_firm(call->arguments->expression);
1649                 return NULL;
1650         case T___builtin_frame_address: {
1651                 long val = fold_constant(call->arguments->expression);
1652                 if (val == 0) {
1653                         /* this nice case */
1654                         return get_irg_frame(current_ir_graph);
1655                 }
1656                 panic("__builtin_frame_address(!= 0) not implemented yet");
1657         }
1658         case T___builtin_return_address:
1659                 panic("__builtin_return_address() not implemented yet");
1660         default:
1661                 panic("unsupported builtin found");
1662         }
1663 }
1664
1665 /**
1666  * Transform a call expression.
1667  * Handles some special cases, like alloca() calls, which must be resolved
1668  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1669  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1670  * handled right...
1671  */
1672 static ir_node *call_expression_to_firm(const call_expression_t *call)
1673 {
1674         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1675         assert(get_cur_block() != NULL);
1676
1677         expression_t *function = call->function;
1678         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1679                 return process_builtin_call(call);
1680         }
1681         if (function->kind == EXPR_REFERENCE) {
1682                 const reference_expression_t *ref    = &function->reference;
1683                 entity_t                     *entity = ref->entity;
1684
1685                 if (entity->kind == ENTITY_FUNCTION
1686                                 && entity->function.entity == rts_entities[rts_alloca]) {
1687                         /* handle alloca() call */
1688                         expression_t *argument = call->arguments->expression;
1689                         ir_node      *size     = expression_to_firm(argument);
1690                         ir_mode      *mode     = get_ir_mode_arithmetic(type_size_t);
1691
1692                         size = create_conv(dbgi, size, mode);
1693
1694                         ir_node  *store  = get_store();
1695                         dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1696                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1697                                                        stack_alloc);
1698                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1699                         set_store(proj_m);
1700                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1701
1702                         return res;
1703                 }
1704         }
1705         ir_node *callee = expression_to_firm(function);
1706
1707         type_t *type = skip_typeref(function->base.type);
1708         assert(is_type_pointer(type));
1709         pointer_type_t *pointer_type = &type->pointer;
1710         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1711         assert(is_type_function(points_to));
1712         function_type_t *function_type = &points_to->function;
1713
1714         int      n_parameters = 0;
1715         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1716         ir_type *new_method_type = NULL;
1717         if (function_type->variadic || function_type->unspecified_parameters) {
1718                 const call_argument_t *argument = call->arguments;
1719                 for ( ; argument != NULL; argument = argument->next) {
1720                         ++n_parameters;
1721                 }
1722
1723                 /* we need to construct a new method type matching the call
1724                  * arguments... */
1725                 int n_res       = get_method_n_ress(ir_method_type);
1726                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1727                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1728                                                     n_parameters, n_res, dbgi);
1729                 set_method_calling_convention(new_method_type,
1730                                get_method_calling_convention(ir_method_type));
1731                 set_method_additional_properties(new_method_type,
1732                                get_method_additional_properties(ir_method_type));
1733                 set_method_variadicity(new_method_type,
1734                                        get_method_variadicity(ir_method_type));
1735
1736                 for (int i = 0; i < n_res; ++i) {
1737                         set_method_res_type(new_method_type, i,
1738                                             get_method_res_type(ir_method_type, i));
1739                 }
1740                 argument = call->arguments;
1741                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1742                         expression_t *expression = argument->expression;
1743                         ir_type      *irtype     = get_ir_type(expression->base.type);
1744                         set_method_param_type(new_method_type, i, irtype);
1745                 }
1746                 ir_method_type = new_method_type;
1747         } else {
1748                 n_parameters = get_method_n_params(ir_method_type);
1749         }
1750
1751         ir_node *in[n_parameters];
1752
1753         const call_argument_t *argument = call->arguments;
1754         for (int n = 0; n < n_parameters; ++n) {
1755                 expression_t *expression = argument->expression;
1756                 ir_node      *arg_node   = expression_to_firm(expression);
1757
1758                 type_t  *type = skip_typeref(expression->base.type);
1759                 if (!is_type_compound(type)) {
1760                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
1761                         arg_node      = create_conv(dbgi, arg_node, mode);
1762                         arg_node      = do_strict_conv(dbgi, arg_node);
1763                 }
1764
1765                 in[n] = arg_node;
1766
1767                 argument = argument->next;
1768         }
1769
1770         ir_node  *store = get_store();
1771         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1772                                      ir_method_type);
1773         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1774         set_store(mem);
1775
1776         type_t  *return_type = skip_typeref(function_type->return_type);
1777         ir_node *result      = NULL;
1778
1779         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1780                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1781
1782                 if (is_type_scalar(return_type)) {
1783                         ir_mode *mode       = get_ir_mode_storage(return_type);
1784                         result              = new_d_Proj(dbgi, resproj, mode, 0);
1785                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1786                         result              = create_conv(NULL, result, mode_arith);
1787                 } else {
1788                         ir_mode *mode = mode_P_data;
1789                         result        = new_d_Proj(dbgi, resproj, mode, 0);
1790                 }
1791         }
1792
1793         if (function->kind == EXPR_REFERENCE &&
1794             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1795                 /* A dead end:  Keep the Call and the Block.  Also place all further
1796                  * nodes into a new and unreachable block. */
1797                 keep_alive(node);
1798                 keep_alive(get_cur_block());
1799                 new_Block(0, NULL);
1800         }
1801
1802         return result;
1803 }
1804
1805 static void statement_to_firm(statement_t *statement);
1806 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1807
1808 static ir_node *expression_to_addr(const expression_t *expression);
1809 static ir_node *create_condition_evaluation(const expression_t *expression,
1810                                             ir_node *true_block,
1811                                             ir_node *false_block);
1812
1813 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1814                          ir_node *value)
1815 {
1816         if (!is_type_compound(type)) {
1817                 ir_mode *mode = get_ir_mode_storage(type);
1818                 value         = create_conv(dbgi, value, mode);
1819                 value         = do_strict_conv(dbgi, value);
1820         }
1821
1822         ir_node *memory = get_store();
1823
1824         if (is_type_scalar(type)) {
1825                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1826                                       ? cons_volatile : cons_none;
1827                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
1828                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1829                 set_store(store_mem);
1830         } else {
1831                 ir_type *irtype    = get_ir_type(type);
1832                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1833                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1834                 set_store(copyb_mem);
1835         }
1836 }
1837
1838 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1839 {
1840         tarval *all_one   = get_mode_all_one(mode);
1841         int     mode_size = get_mode_size_bits(mode);
1842
1843         assert(offset >= 0);
1844         assert(size   >= 0);
1845         assert(offset + size <= mode_size);
1846         if (size == mode_size) {
1847                 return all_one;
1848         }
1849
1850         long    shiftr    = get_mode_size_bits(mode) - size;
1851         long    shiftl    = offset;
1852         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1853         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1854         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1855         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1856
1857         return mask1;
1858 }
1859
1860 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1861                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1862 {
1863         ir_type *entity_type = get_entity_type(entity);
1864         ir_type *base_type   = get_primitive_base_type(entity_type);
1865         assert(base_type != NULL);
1866         ir_mode *mode        = get_type_mode(base_type);
1867
1868         value = create_conv(dbgi, value, mode);
1869
1870         /* kill upper bits of value and shift to right position */
1871         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1872         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1873
1874         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1875         ir_node *mask_node       = new_d_Const(dbgi, mask);
1876         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1877         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1878         ir_node *shiftcount      = new_d_Const(dbgi, shiftl);
1879         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1880
1881         /* load current value */
1882         ir_node  *mem             = get_store();
1883         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode,
1884                                         set_volatile ? cons_volatile : cons_none);
1885         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1886         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1887         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1888         tarval   *inv_mask        = tarval_not(shift_mask);
1889         ir_node  *inv_mask_node   = new_d_Const(dbgi, inv_mask);
1890         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1891
1892         /* construct new value and store */
1893         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1894         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
1895                                          set_volatile ? cons_volatile : cons_none);
1896         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1897         set_store(store_mem);
1898
1899         return value_masked;
1900 }
1901
1902 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1903                 ir_node *addr)
1904 {
1905         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1906         type_t   *type     = expression->base.type;
1907         ir_mode  *mode     = get_ir_mode_storage(type);
1908         ir_node  *mem      = get_store();
1909         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode, cons_none);
1910         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1911         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1912
1913         load_res           = create_conv(dbgi, load_res, mode_int);
1914
1915         set_store(load_mem);
1916
1917         /* kill upper bits */
1918         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1919         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1920         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1921         ir_type   *entity_type  = get_entity_type(entity);
1922         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1923         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1924         assert(shift_bitsl >= 0);
1925         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1926         ir_node   *countl       = new_d_Const(dbgi, tvl);
1927         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1928
1929         long       shift_bitsr  = bitoffset + shift_bitsl;
1930         assert(shift_bitsr <= (long) machine_size);
1931         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1932         ir_node   *countr       = new_d_Const(dbgi, tvr);
1933         ir_node   *shiftr;
1934         if (mode_is_signed(mode)) {
1935                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1936         } else {
1937                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1938         }
1939
1940         return create_conv(dbgi, shiftr, mode);
1941 }
1942
1943 /* make sure the selected compound type is constructed */
1944 static void construct_select_compound(const select_expression_t *expression)
1945 {
1946         type_t *type = skip_typeref(expression->compound->base.type);
1947         if (is_type_pointer(type)) {
1948                 type = type->pointer.points_to;
1949         }
1950         (void) get_ir_type(type);
1951 }
1952
1953 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1954                                               ir_node *value, ir_node *addr)
1955 {
1956         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1957         type_t   *type = skip_typeref(expression->base.type);
1958
1959         if (!is_type_compound(type)) {
1960                 ir_mode  *mode = get_ir_mode_storage(type);
1961                 value          = create_conv(dbgi, value, mode);
1962                 value          = do_strict_conv(dbgi, value);
1963         }
1964
1965         if (expression->kind == EXPR_REFERENCE) {
1966                 const reference_expression_t *ref = &expression->reference;
1967
1968                 entity_t *entity = ref->entity;
1969                 assert(is_declaration(entity));
1970                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1971                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1972                         set_value(entity->variable.v.value_number, value);
1973                         return value;
1974                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1975                         set_value(entity->parameter.v.value_number, value);
1976                         return value;
1977                 }
1978         }
1979
1980         if (addr == NULL)
1981                 addr = expression_to_addr(expression);
1982         assert(addr != NULL);
1983
1984         if (expression->kind == EXPR_SELECT) {
1985                 const select_expression_t *select = &expression->select;
1986
1987                 construct_select_compound(select);
1988
1989                 entity_t *entity = select->compound_entry;
1990                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1991                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1992                         ir_entity *irentity = entity->compound_member.entity;
1993                         bool       set_volatile
1994                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1995                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
1996                                                        set_volatile);
1997                         return value;
1998                 }
1999         }
2000
2001         assign_value(dbgi, addr, type, value);
2002         return value;
2003 }
2004
2005 static void set_value_for_expression(const expression_t *expression,
2006                                      ir_node *value)
2007 {
2008         set_value_for_expression_addr(expression, value, NULL);
2009 }
2010
2011 static ir_node *get_value_from_lvalue(const expression_t *expression,
2012                                       ir_node *addr)
2013 {
2014         if (expression->kind == EXPR_REFERENCE) {
2015                 const reference_expression_t *ref = &expression->reference;
2016
2017                 entity_t *entity = ref->entity;
2018                 assert(entity->kind == ENTITY_VARIABLE
2019                                 || entity->kind == ENTITY_PARAMETER);
2020                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2021                 int value_number;
2022                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2023                         value_number = entity->variable.v.value_number;
2024                         assert(addr == NULL);
2025                         type_t  *type = skip_typeref(expression->base.type);
2026                         ir_mode *mode = get_ir_mode_storage(type);
2027                         ir_node *res  = get_value(value_number, mode);
2028                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2029                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2030                         value_number = entity->parameter.v.value_number;
2031                         assert(addr == NULL);
2032                         type_t  *type = skip_typeref(expression->base.type);
2033                         ir_mode *mode = get_ir_mode_storage(type);
2034                         ir_node *res  = get_value(value_number, mode);
2035                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2036                 }
2037         }
2038
2039         assert(addr != NULL);
2040         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2041
2042         ir_node *value;
2043         if (expression->kind == EXPR_SELECT &&
2044             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2045             construct_select_compound(&expression->select);
2046                 value = bitfield_extract_to_firm(&expression->select, addr);
2047         } else {
2048                 value = deref_address(dbgi, expression->base.type, addr);
2049         }
2050
2051         return value;
2052 }
2053
2054
2055 static ir_node *create_incdec(const unary_expression_t *expression)
2056 {
2057         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2058         const expression_t *value_expr = expression->value;
2059         ir_node            *addr       = expression_to_addr(value_expr);
2060         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2061
2062         type_t  *type = skip_typeref(expression->base.type);
2063         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2064
2065         ir_node *offset;
2066         if (is_type_pointer(type)) {
2067                 pointer_type_t *pointer_type = &type->pointer;
2068                 offset                       = get_type_size(pointer_type->points_to);
2069         } else {
2070                 assert(is_type_arithmetic(type));
2071                 offset = new_Const(get_mode_one(mode));
2072         }
2073
2074         ir_node *result;
2075         ir_node *store_value;
2076         switch(expression->base.kind) {
2077         case EXPR_UNARY_POSTFIX_INCREMENT:
2078                 result      = value;
2079                 store_value = new_d_Add(dbgi, value, offset, mode);
2080                 break;
2081         case EXPR_UNARY_POSTFIX_DECREMENT:
2082                 result      = value;
2083                 store_value = new_d_Sub(dbgi, value, offset, mode);
2084                 break;
2085         case EXPR_UNARY_PREFIX_INCREMENT:
2086                 result      = new_d_Add(dbgi, value, offset, mode);
2087                 store_value = result;
2088                 break;
2089         case EXPR_UNARY_PREFIX_DECREMENT:
2090                 result      = new_d_Sub(dbgi, value, offset, mode);
2091                 store_value = result;
2092                 break;
2093         default:
2094                 panic("no incdec expr in create_incdec");
2095         }
2096
2097         set_value_for_expression_addr(value_expr, store_value, addr);
2098
2099         return result;
2100 }
2101
2102 static bool is_local_variable(expression_t *expression)
2103 {
2104         if (expression->kind != EXPR_REFERENCE)
2105                 return false;
2106         reference_expression_t *ref_expr = &expression->reference;
2107         entity_t               *entity   = ref_expr->entity;
2108         if (entity->kind != ENTITY_VARIABLE)
2109                 return false;
2110         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2111         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2112 }
2113
2114 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2115 {
2116         switch(kind) {
2117         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2118         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2119         case EXPR_BINARY_NOTEQUAL:
2120                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2121         case EXPR_BINARY_ISLESS:
2122         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2123         case EXPR_BINARY_ISLESSEQUAL:
2124         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2125         case EXPR_BINARY_ISGREATER:
2126         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2127         case EXPR_BINARY_ISGREATEREQUAL:
2128         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2129         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2130
2131         default:
2132                 break;
2133         }
2134         panic("trying to get pn_Cmp from non-comparison binexpr type");
2135 }
2136
2137 /**
2138  * Handle the assume optimizer hint: check if a Confirm
2139  * node can be created.
2140  *
2141  * @param dbi    debug info
2142  * @param expr   the IL assume expression
2143  *
2144  * we support here only some simple cases:
2145  *  - var rel const
2146  *  - const rel val
2147  *  - var rel var
2148  */
2149 static ir_node *handle_assume_compare(dbg_info *dbi,
2150                                       const binary_expression_t *expression)
2151 {
2152         expression_t *op1 = expression->left;
2153         expression_t *op2 = expression->right;
2154         entity_t     *var2, *var = NULL;
2155         ir_node      *res = NULL;
2156         pn_Cmp        cmp_val;
2157
2158         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2159
2160         if (is_local_variable(op1) && is_local_variable(op2)) {
2161         var  = op1->reference.entity;
2162             var2 = op2->reference.entity;
2163
2164                 type_t  *const type = skip_typeref(var->declaration.type);
2165                 ir_mode *const mode = get_ir_mode_storage(type);
2166
2167                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2168                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2169
2170                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2171                 set_value(var2->variable.v.value_number, res);
2172
2173                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2174                 set_value(var->variable.v.value_number, res);
2175
2176                 return res;
2177         }
2178
2179         expression_t *con;
2180         if (is_local_variable(op1) && is_constant_expression(op2)) {
2181                 var = op1->reference.entity;
2182                 con = op2;
2183         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2184                 cmp_val = get_inversed_pnc(cmp_val);
2185                 var = op2->reference.entity;
2186                 con = op1;
2187         }
2188
2189         if (var != NULL) {
2190                 type_t  *const type = skip_typeref(var->declaration.type);
2191                 ir_mode *const mode = get_ir_mode_storage(type);
2192
2193                 res = get_value(var->variable.v.value_number, mode);
2194                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2195                 set_value(var->variable.v.value_number, res);
2196         }
2197         return res;
2198 }
2199
2200 /**
2201  * Handle the assume optimizer hint.
2202  *
2203  * @param dbi    debug info
2204  * @param expr   the IL assume expression
2205  */
2206 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2207 {
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 static entity_t *get_expression_entity(const expression_t *expression)
2747 {
2748         if (expression->kind != EXPR_REFERENCE)
2749                 return NULL;
2750
2751         return expression->reference.entity;
2752 }
2753
2754 /**
2755  * Transform an alignof expression into Firm code.
2756  */
2757 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2758 {
2759         ir_entity *irentity = NULL;
2760
2761         const expression_t *tp_expression = expression->tp_expression;
2762         if (tp_expression != NULL) {
2763                 entity_t *entity = get_expression_entity(tp_expression);
2764                 if (entity != NULL && is_declaration(entity)) {
2765                         switch (entity->declaration.kind) {
2766                         case DECLARATION_KIND_UNKNOWN:
2767                                 panic("unknown entity reference found");
2768                         case DECLARATION_KIND_COMPOUND_MEMBER:
2769                                 irentity = entity->compound_member.entity;
2770                                 break;
2771                         case DECLARATION_KIND_GLOBAL_VARIABLE:
2772                         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
2773                                 irentity = entity->variable.v.entity;
2774                                 break;
2775                         case DECLARATION_KIND_PARAMETER_ENTITY:
2776                                 irentity = entity->parameter.v.entity;
2777                                 break;
2778                         case DECLARATION_KIND_FUNCTION:
2779                         case DECLARATION_KIND_INNER_FUNCTION:
2780                                 irentity = entity->function.entity;
2781                                 break;
2782                         case DECLARATION_KIND_PARAMETER:
2783                         case DECLARATION_KIND_LOCAL_VARIABLE:
2784                         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
2785                                 break;
2786                         }
2787                 }
2788         }
2789
2790         ir_type *irtype;
2791         if (irentity != NULL) {
2792                 irtype = get_entity_type(irentity);
2793         } else {
2794                 type_t *type = expression->type;
2795                 irtype = get_ir_type(type);
2796         }
2797
2798         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2799         symconst_symbol sym;
2800         sym.type_p = irtype;
2801         return new_SymConst(mode, sym, symconst_type_align);
2802 }
2803
2804 static void init_ir_types(void);
2805
2806 long fold_constant(const expression_t *expression)
2807 {
2808         assert(is_type_valid(skip_typeref(expression->base.type)));
2809
2810         bool constant_folding_old = constant_folding;
2811         constant_folding = true;
2812
2813         init_ir_types();
2814
2815         assert(is_constant_expression(expression));
2816
2817         ir_graph *old_current_ir_graph = current_ir_graph;
2818         current_ir_graph = get_const_code_irg();
2819
2820         ir_node *cnst = expression_to_firm(expression);
2821         current_ir_graph = old_current_ir_graph;
2822
2823         if (!is_Const(cnst)) {
2824                 panic("couldn't fold constant");
2825         }
2826
2827         tarval *tv = get_Const_tarval(cnst);
2828         if (!tarval_is_long(tv)) {
2829                 panic("result of constant folding is not integer");
2830         }
2831
2832         constant_folding = constant_folding_old;
2833
2834         return get_tarval_long(tv);
2835 }
2836
2837 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2838 {
2839         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2840
2841         /* first try to fold a constant condition */
2842         if (is_constant_expression(expression->condition)) {
2843                 long val = fold_constant(expression->condition);
2844                 if (val) {
2845                         expression_t *true_expression = expression->true_expression;
2846                         if (true_expression == NULL)
2847                                 true_expression = expression->condition;
2848                         return expression_to_firm(true_expression);
2849                 } else {
2850                         return expression_to_firm(expression->false_expression);
2851                 }
2852         }
2853
2854         ir_node *cur_block   = get_cur_block();
2855
2856         /* create the true block */
2857         ir_node *true_block  = new_immBlock();
2858         set_cur_block(true_block);
2859
2860         ir_node *true_val = expression->true_expression != NULL ?
2861                 expression_to_firm(expression->true_expression) : NULL;
2862         ir_node *true_jmp = new_Jmp();
2863
2864         /* create the false block */
2865         ir_node *false_block = new_immBlock();
2866         set_cur_block(false_block);
2867
2868         ir_node *false_val = expression_to_firm(expression->false_expression);
2869         ir_node *false_jmp = new_Jmp();
2870
2871         /* create the condition evaluation */
2872         set_cur_block(cur_block);
2873         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2874         if (expression->true_expression == NULL) {
2875                 if (cond_expr != NULL) {
2876                         true_val = cond_expr;
2877                 } else {
2878                         /* Condition ended with a short circuit (&&, ||, !) operation.
2879                          * Generate a "1" as value for the true branch. */
2880                         true_val = new_Const(get_mode_one(mode_Is));
2881                 }
2882         }
2883         mature_immBlock(true_block);
2884         mature_immBlock(false_block);
2885
2886         /* create the common block */
2887         ir_node *in_cf[2] = { true_jmp, false_jmp };
2888         new_Block(2, in_cf);
2889
2890         /* TODO improve static semantics, so either both or no values are NULL */
2891         if (true_val == NULL || false_val == NULL)
2892                 return NULL;
2893
2894         ir_node *in[2] = { true_val, false_val };
2895         ir_mode *mode  = get_irn_mode(true_val);
2896         assert(get_irn_mode(false_val) == mode);
2897         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2898
2899         return val;
2900 }
2901
2902 /**
2903  * Returns an IR-node representing the address of a field.
2904  */
2905 static ir_node *select_addr(const select_expression_t *expression)
2906 {
2907         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2908
2909         construct_select_compound(expression);
2910
2911         ir_node *compound_addr = expression_to_firm(expression->compound);
2912
2913         entity_t *entry = expression->compound_entry;
2914         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2915         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2916
2917         if (constant_folding) {
2918                 ir_mode *mode = get_irn_mode(compound_addr);
2919                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2920                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
2921                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2922         } else {
2923                 ir_entity *irentity = entry->compound_member.entity;
2924                 assert(irentity != NULL);
2925                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2926         }
2927 }
2928
2929 static ir_node *select_to_firm(const select_expression_t *expression)
2930 {
2931         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2932         ir_node  *addr = select_addr(expression);
2933         type_t   *type = revert_automatic_type_conversion(
2934                         (const expression_t*) expression);
2935         type           = skip_typeref(type);
2936
2937         entity_t *entry      = expression->compound_entry;
2938         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2939         type_t   *entry_type = skip_typeref(entry->declaration.type);
2940
2941         if (entry_type->kind == TYPE_BITFIELD) {
2942                 return bitfield_extract_to_firm(expression, addr);
2943         }
2944
2945         return deref_address(dbgi, type, addr);
2946 }
2947
2948 /* Values returned by __builtin_classify_type. */
2949 typedef enum gcc_type_class
2950 {
2951         no_type_class = -1,
2952         void_type_class,
2953         integer_type_class,
2954         char_type_class,
2955         enumeral_type_class,
2956         boolean_type_class,
2957         pointer_type_class,
2958         reference_type_class,
2959         offset_type_class,
2960         real_type_class,
2961         complex_type_class,
2962         function_type_class,
2963         method_type_class,
2964         record_type_class,
2965         union_type_class,
2966         array_type_class,
2967         string_type_class,
2968         set_type_class,
2969         file_type_class,
2970         lang_type_class
2971 } gcc_type_class;
2972
2973 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2974 {
2975         type_t *type = expr->type_expression->base.type;
2976
2977         /* FIXME gcc returns different values depending on whether compiling C or C++
2978          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2979         gcc_type_class tc;
2980         for (;;) {
2981                 type = skip_typeref(type);
2982                 switch (type->kind) {
2983                         case TYPE_ATOMIC: {
2984                                 const atomic_type_t *const atomic_type = &type->atomic;
2985                                 switch (atomic_type->akind) {
2986                                         /* should not be reached */
2987                                         case ATOMIC_TYPE_INVALID:
2988                                                 tc = no_type_class;
2989                                                 goto make_const;
2990
2991                                         /* gcc cannot do that */
2992                                         case ATOMIC_TYPE_VOID:
2993                                                 tc = void_type_class;
2994                                                 goto make_const;
2995
2996                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
2997                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2998                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2999                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3000                                         case ATOMIC_TYPE_SHORT:
3001                                         case ATOMIC_TYPE_USHORT:
3002                                         case ATOMIC_TYPE_INT:
3003                                         case ATOMIC_TYPE_UINT:
3004                                         case ATOMIC_TYPE_LONG:
3005                                         case ATOMIC_TYPE_ULONG:
3006                                         case ATOMIC_TYPE_LONGLONG:
3007                                         case ATOMIC_TYPE_ULONGLONG:
3008                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3009                                                 tc = integer_type_class;
3010                                                 goto make_const;
3011
3012                                         case ATOMIC_TYPE_FLOAT:
3013                                         case ATOMIC_TYPE_DOUBLE:
3014                                         case ATOMIC_TYPE_LONG_DOUBLE:
3015                                                 tc = real_type_class;
3016                                                 goto make_const;
3017                                 }
3018                                 panic("Unexpected atomic type in classify_type_to_firm().");
3019                         }
3020
3021                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3022                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3023                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
3024                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3025                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3026                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3027                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3028                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3029
3030                         /* gcc handles this as integer */
3031                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3032
3033                         /* gcc classifies the referenced type */
3034                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3035
3036                         case TYPE_BUILTIN:
3037                         /* typedef/typeof should be skipped already */
3038                         case TYPE_TYPEDEF:
3039                         case TYPE_TYPEOF:
3040                         case TYPE_INVALID:
3041                         case TYPE_ERROR:
3042                                 break;
3043                 }
3044                 panic("unexpected TYPE classify_type_to_firm().");
3045         }
3046
3047 make_const:;
3048         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3049         tarval   *const tv   = new_tarval_from_long(tc, mode_int);
3050         return new_d_Const(dbgi, tv);
3051 }
3052
3053 static ir_node *function_name_to_firm(
3054                 const funcname_expression_t *const expr)
3055 {
3056         switch(expr->kind) {
3057         case FUNCNAME_FUNCTION:
3058         case FUNCNAME_PRETTY_FUNCTION:
3059         case FUNCNAME_FUNCDNAME:
3060                 if (current_function_name == NULL) {
3061                         const source_position_t *const src_pos = &expr->base.source_position;
3062                         const char    *name  = current_function_entity->base.symbol->string;
3063                         const string_t string = { name, strlen(name) + 1 };
3064                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3065                 }
3066                 return current_function_name;
3067         case FUNCNAME_FUNCSIG:
3068                 if (current_funcsig == NULL) {
3069                         const source_position_t *const src_pos = &expr->base.source_position;
3070                         ir_entity *ent = get_irg_entity(current_ir_graph);
3071                         const char *const name = get_entity_ld_name(ent);
3072                         const string_t string = { name, strlen(name) + 1 };
3073                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3074                 }
3075                 return current_funcsig;
3076         }
3077         panic("Unsupported function name");
3078 }
3079
3080 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3081 {
3082         statement_t *statement = expr->statement;
3083
3084         assert(statement->kind == STATEMENT_COMPOUND);
3085         return compound_statement_to_firm(&statement->compound);
3086 }
3087
3088 static ir_node *va_start_expression_to_firm(
3089         const va_start_expression_t *const expr)
3090 {
3091         type_t    *const type        = current_function_entity->declaration.type;
3092         ir_type   *const method_type = get_ir_type(type);
3093         int        const n           = get_method_n_params(method_type) - 1;
3094         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3095         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
3096         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3097         ir_node   *const no_mem      = new_NoMem();
3098         ir_node   *const arg_sel     =
3099                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3100
3101         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
3102         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3103         set_value_for_expression(expr->ap, add);
3104
3105         return NULL;
3106 }
3107
3108 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3109 {
3110         type_t       *const type    = expr->base.type;
3111         expression_t *const ap_expr = expr->ap;
3112         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3113         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3114         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3115         ir_node      *const res     = deref_address(dbgi, type, ap);
3116
3117         ir_node      *const cnst    = get_type_size(expr->base.type);
3118         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
3119
3120         set_value_for_expression_addr(ap_expr, add, ap_addr);
3121
3122         return res;
3123 }
3124
3125 static ir_node *dereference_addr(const unary_expression_t *const expression)
3126 {
3127         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3128         return expression_to_firm(expression->value);
3129 }
3130
3131 /**
3132  * Returns a IR-node representing an lvalue of the given expression.
3133  */
3134 static ir_node *expression_to_addr(const expression_t *expression)
3135 {
3136         switch(expression->kind) {
3137         case EXPR_ARRAY_ACCESS:
3138                 return array_access_addr(&expression->array_access);
3139         case EXPR_CALL:
3140                 return call_expression_to_firm(&expression->call);
3141         case EXPR_COMPOUND_LITERAL:
3142                 return compound_literal_to_firm(&expression->compound_literal);
3143         case EXPR_REFERENCE:
3144                 return reference_addr(&expression->reference);
3145         case EXPR_SELECT:
3146                 return select_addr(&expression->select);
3147         case EXPR_UNARY_DEREFERENCE:
3148                 return dereference_addr(&expression->unary);
3149         default:
3150                 break;
3151         }
3152         panic("trying to get address of non-lvalue");
3153 }
3154
3155 static ir_node *builtin_constant_to_firm(
3156                 const builtin_constant_expression_t *expression)
3157 {
3158         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3159         long     v;
3160
3161         if (is_constant_expression(expression->value)) {
3162                 v = 1;
3163         } else {
3164                 v = 0;
3165         }
3166         return new_Const_long(mode, v);
3167 }
3168
3169 static ir_node *builtin_types_compatible_to_firm(
3170                 const builtin_types_compatible_expression_t *expression)
3171 {
3172         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3173         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3174         long     const value = types_compatible(left, right) ? 1 : 0;
3175         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3176         return new_Const_long(mode, value);
3177 }
3178
3179 static ir_node *builtin_prefetch_to_firm(
3180                 const builtin_prefetch_expression_t *expression)
3181 {
3182         ir_node *adr = expression_to_firm(expression->adr);
3183         /* no Firm support for prefetch yet */
3184         (void) adr;
3185         return NULL;
3186 }
3187
3188 static ir_node *get_label_block(label_t *label)
3189 {
3190         if (label->block != NULL)
3191                 return label->block;
3192
3193         /* beware: might be called from create initializer with current_ir_graph
3194          * set to const_code_irg. */
3195         ir_graph *rem    = current_ir_graph;
3196         current_ir_graph = current_function;
3197
3198         ir_node *block = new_immBlock();
3199
3200         label->block = block;
3201
3202         ARR_APP1(label_t *, all_labels, label);
3203
3204         current_ir_graph = rem;
3205         return block;
3206 }
3207
3208 /**
3209  * Pointer to a label.  This is used for the
3210  * GNU address-of-label extension.
3211  */
3212 static ir_node *label_address_to_firm(
3213                 const label_address_expression_t *label)
3214 {
3215         ir_node    *block = get_label_block(label->label);
3216         ir_label_t  nr    = get_Block_label(block);
3217
3218         if (nr == 0) {
3219                 nr = get_irp_next_label_nr();
3220                 set_Block_label(block, nr);
3221         }
3222         symconst_symbol value;
3223         value.label = nr;
3224         return new_SymConst(mode_P_code, value, symconst_label);
3225 }
3226
3227 static ir_node *builtin_symbol_to_firm(
3228                 const builtin_symbol_expression_t *expression)
3229 {
3230         /* for gcc compatibility we have to produce (dummy) addresses for some
3231          * builtins */
3232         if (warning.other) {
3233                 warningf(&expression->base.source_position,
3234                                  "taking address of builtin '%Y'", expression->symbol);
3235         }
3236
3237         /* simply create a NULL pointer */
3238         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
3239         ir_node  *res  = new_Const_long(mode, 0);
3240
3241         return res;
3242 }
3243
3244 /**
3245  * creates firm nodes for an expression. The difference between this function
3246  * and expression_to_firm is, that this version might produce mode_b nodes
3247  * instead of mode_Is.
3248  */
3249 static ir_node *_expression_to_firm(const expression_t *expression)
3250 {
3251 #ifndef NDEBUG
3252         if (!constant_folding) {
3253                 assert(!expression->base.transformed);
3254                 ((expression_t*) expression)->base.transformed = true;
3255         }
3256 #endif
3257
3258         switch (expression->kind) {
3259         case EXPR_CHARACTER_CONSTANT:
3260                 return character_constant_to_firm(&expression->conste);
3261         case EXPR_WIDE_CHARACTER_CONSTANT:
3262                 return wide_character_constant_to_firm(&expression->conste);
3263         case EXPR_CONST:
3264                 return const_to_firm(&expression->conste);
3265         case EXPR_STRING_LITERAL:
3266                 return string_literal_to_firm(&expression->string);
3267         case EXPR_WIDE_STRING_LITERAL:
3268                 return wide_string_literal_to_firm(&expression->wide_string);
3269         case EXPR_REFERENCE:
3270                 return reference_expression_to_firm(&expression->reference);
3271         case EXPR_REFERENCE_ENUM_VALUE:
3272                 return reference_expression_enum_value_to_firm(&expression->reference);
3273         case EXPR_CALL:
3274                 return call_expression_to_firm(&expression->call);
3275         EXPR_UNARY_CASES
3276                 return unary_expression_to_firm(&expression->unary);
3277         EXPR_BINARY_CASES
3278                 return binary_expression_to_firm(&expression->binary);
3279         case EXPR_ARRAY_ACCESS:
3280                 return array_access_to_firm(&expression->array_access);
3281         case EXPR_SIZEOF:
3282                 return sizeof_to_firm(&expression->typeprop);
3283         case EXPR_ALIGNOF:
3284                 return alignof_to_firm(&expression->typeprop);
3285         case EXPR_CONDITIONAL:
3286                 return conditional_to_firm(&expression->conditional);
3287         case EXPR_SELECT:
3288                 return select_to_firm(&expression->select);
3289         case EXPR_CLASSIFY_TYPE:
3290                 return classify_type_to_firm(&expression->classify_type);
3291         case EXPR_FUNCNAME:
3292                 return function_name_to_firm(&expression->funcname);
3293         case EXPR_STATEMENT:
3294                 return statement_expression_to_firm(&expression->statement);
3295         case EXPR_VA_START:
3296                 return va_start_expression_to_firm(&expression->va_starte);
3297         case EXPR_VA_ARG:
3298                 return va_arg_expression_to_firm(&expression->va_arge);
3299         case EXPR_BUILTIN_SYMBOL:
3300                 return builtin_symbol_to_firm(&expression->builtin_symbol);
3301         case EXPR_BUILTIN_CONSTANT_P:
3302                 return builtin_constant_to_firm(&expression->builtin_constant);
3303         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3304                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3305         case EXPR_BUILTIN_PREFETCH:
3306                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3307         case EXPR_OFFSETOF:
3308                 return offsetof_to_firm(&expression->offsetofe);
3309         case EXPR_COMPOUND_LITERAL:
3310                 return compound_literal_to_firm(&expression->compound_literal);
3311         case EXPR_LABEL_ADDRESS:
3312                 return label_address_to_firm(&expression->label_address);
3313
3314         case EXPR_UNKNOWN:
3315         case EXPR_INVALID:
3316                 break;
3317         }
3318         panic("invalid expression found");
3319 }
3320
3321 static bool is_builtin_expect(const expression_t *expression)
3322 {
3323         if (expression->kind != EXPR_CALL)
3324                 return false;
3325
3326         expression_t *function = expression->call.function;
3327         if (function->kind != EXPR_BUILTIN_SYMBOL)
3328                 return false;
3329         if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3330                 return false;
3331
3332         return true;
3333 }
3334
3335 static bool produces_mode_b(const expression_t *expression)
3336 {
3337         switch (expression->kind) {
3338         case EXPR_BINARY_EQUAL:
3339         case EXPR_BINARY_NOTEQUAL:
3340         case EXPR_BINARY_LESS:
3341         case EXPR_BINARY_LESSEQUAL:
3342         case EXPR_BINARY_GREATER:
3343         case EXPR_BINARY_GREATEREQUAL:
3344         case EXPR_BINARY_ISGREATER:
3345         case EXPR_BINARY_ISGREATEREQUAL:
3346         case EXPR_BINARY_ISLESS:
3347         case EXPR_BINARY_ISLESSEQUAL:
3348         case EXPR_BINARY_ISLESSGREATER:
3349         case EXPR_BINARY_ISUNORDERED:
3350         case EXPR_UNARY_NOT:
3351                 return true;
3352
3353         case EXPR_CALL:
3354                 if (is_builtin_expect(expression)) {
3355                         expression_t *argument = expression->call.arguments->expression;
3356                         return produces_mode_b(argument);
3357                 }
3358                 return false;
3359         case EXPR_BINARY_COMMA:
3360                 return produces_mode_b(expression->binary.right);
3361
3362         default:
3363                 return false;
3364         }
3365 }
3366
3367 static ir_node *expression_to_firm(const expression_t *expression)
3368 {
3369         if (!produces_mode_b(expression)) {
3370                 ir_node *res = _expression_to_firm(expression);
3371                 assert(res == NULL || get_irn_mode(res) != mode_b);
3372                 return res;
3373         }
3374
3375         if (is_constant_expression(expression)) {
3376                 ir_node *res  = _expression_to_firm(expression);
3377                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3378                 assert(is_Const(res));
3379                 if (is_Const_null(res)) {
3380                         return new_Const_long(mode, 0);
3381                 } else {
3382                         return new_Const_long(mode, 1);
3383                 }
3384         }
3385
3386         /* we have to produce a 0/1 from the mode_b expression */
3387         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3388         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3389         return produce_condition_result(expression, mode, dbgi);
3390 }
3391
3392 /**
3393  * create a short-circuit expression evaluation that tries to construct
3394  * efficient control flow structures for &&, || and ! expressions
3395  */
3396 static ir_node *create_condition_evaluation(const expression_t *expression,
3397                                             ir_node *true_block,
3398                                             ir_node *false_block)
3399 {
3400         switch(expression->kind) {
3401         case EXPR_UNARY_NOT: {
3402                 const unary_expression_t *unary_expression = &expression->unary;
3403                 create_condition_evaluation(unary_expression->value, false_block,
3404                                             true_block);
3405                 return NULL;
3406         }
3407         case EXPR_BINARY_LOGICAL_AND: {
3408                 const binary_expression_t *binary_expression = &expression->binary;
3409
3410                 ir_node *extra_block = new_immBlock();
3411                 create_condition_evaluation(binary_expression->left, extra_block,
3412                                             false_block);
3413                 mature_immBlock(extra_block);
3414                 set_cur_block(extra_block);
3415                 create_condition_evaluation(binary_expression->right, true_block,
3416                                             false_block);
3417                 return NULL;
3418         }
3419         case EXPR_BINARY_LOGICAL_OR: {
3420                 const binary_expression_t *binary_expression = &expression->binary;
3421
3422                 ir_node *extra_block = new_immBlock();
3423                 create_condition_evaluation(binary_expression->left, true_block,
3424                                             extra_block);
3425                 mature_immBlock(extra_block);
3426                 set_cur_block(extra_block);
3427                 create_condition_evaluation(binary_expression->right, true_block,
3428                                             false_block);
3429                 return NULL;
3430         }
3431         default:
3432                 break;
3433         }
3434
3435         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3436         ir_node  *cond_expr  = _expression_to_firm(expression);
3437         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3438         ir_node  *cond       = new_d_Cond(dbgi, condition);
3439         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3440         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3441
3442         /* set branch prediction info based on __builtin_expect */
3443         if (is_builtin_expect(expression) && is_Cond(cond)) {
3444                 call_argument_t *argument = expression->call.arguments->next;
3445                 if (is_constant_expression(argument->expression)) {
3446                         long               cnst = fold_constant(argument->expression);
3447                         cond_jmp_predicate pred;
3448
3449                         if (cnst == 0) {
3450                                 pred = COND_JMP_PRED_FALSE;
3451                         } else {
3452                                 pred = COND_JMP_PRED_TRUE;
3453                         }
3454                         set_Cond_jmp_pred(cond, pred);
3455                 }
3456         }
3457
3458         add_immBlock_pred(true_block, true_proj);
3459         add_immBlock_pred(false_block, false_proj);
3460
3461         set_cur_block(NULL);
3462         return cond_expr;
3463 }
3464
3465
3466 static void create_variable_entity(entity_t *variable,
3467                                    declaration_kind_t declaration_kind,
3468                                    ir_type *parent_type)
3469 {
3470         assert(variable->kind == ENTITY_VARIABLE);
3471         type_t    *type = skip_typeref(variable->declaration.type);
3472         type            = get_aligned_type(type, variable->variable.alignment);
3473
3474         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3475         ir_type   *const irtype   = get_ir_type(type);
3476         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3477
3478         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3479
3480         handle_gnu_attributes_ent(irentity, variable);
3481
3482         variable->declaration.kind  = (unsigned char) declaration_kind;
3483         variable->variable.v.entity = irentity;
3484         set_entity_variability(irentity, variability_uninitialized);
3485         set_entity_ld_ident(irentity, create_ld_ident(variable));
3486
3487         if (parent_type == get_tls_type())
3488                 set_entity_allocation(irentity, allocation_automatic);
3489         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3490                 set_entity_allocation(irentity, allocation_static);
3491
3492         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3493                 set_entity_volatility(irentity, volatility_is_volatile);
3494         }
3495 }
3496
3497
3498 typedef struct type_path_entry_t type_path_entry_t;
3499 struct type_path_entry_t {
3500         type_t           *type;
3501         ir_initializer_t *initializer;
3502         size_t            index;
3503         entity_t         *compound_entry;
3504 };
3505
3506 typedef struct type_path_t type_path_t;
3507 struct type_path_t {
3508         type_path_entry_t *path;
3509         type_t            *top_type;
3510         bool               invalid;
3511 };
3512
3513 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3514 {
3515         size_t len = ARR_LEN(path->path);
3516
3517         for (size_t i = 0; i < len; ++i) {
3518                 const type_path_entry_t *entry = & path->path[i];
3519
3520                 type_t *type = skip_typeref(entry->type);
3521                 if (is_type_compound(type)) {
3522                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3523                 } else if (is_type_array(type)) {
3524                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3525                 } else {
3526                         fprintf(stderr, "-INVALID-");
3527                 }
3528         }
3529         fprintf(stderr, "  (");
3530         print_type(path->top_type);
3531         fprintf(stderr, ")");
3532 }
3533
3534 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3535 {
3536         size_t len = ARR_LEN(path->path);
3537         assert(len > 0);
3538         return & path->path[len-1];
3539 }
3540
3541 static type_path_entry_t *append_to_type_path(type_path_t *path)
3542 {
3543         size_t len = ARR_LEN(path->path);
3544         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3545
3546         type_path_entry_t *result = & path->path[len];
3547         memset(result, 0, sizeof(result[0]));
3548         return result;
3549 }
3550
3551 static size_t get_compound_member_count(const compound_type_t *type)
3552 {
3553         compound_t *compound  = type->compound;
3554         size_t      n_members = 0;
3555         entity_t   *member    = compound->members.entities;
3556         for ( ; member != NULL; member = member->base.next) {
3557                 ++n_members;
3558         }
3559
3560         return n_members;
3561 }
3562
3563 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3564 {
3565         type_t *orig_top_type = path->top_type;
3566         type_t *top_type      = skip_typeref(orig_top_type);
3567
3568         assert(is_type_compound(top_type) || is_type_array(top_type));
3569
3570         if (ARR_LEN(path->path) == 0) {
3571                 return NULL;
3572         } else {
3573                 type_path_entry_t *top         = get_type_path_top(path);
3574                 ir_initializer_t  *initializer = top->initializer;
3575                 return get_initializer_compound_value(initializer, top->index);
3576         }
3577 }
3578
3579 static void descend_into_subtype(type_path_t *path)
3580 {
3581         type_t *orig_top_type = path->top_type;
3582         type_t *top_type      = skip_typeref(orig_top_type);
3583
3584         assert(is_type_compound(top_type) || is_type_array(top_type));
3585
3586         ir_initializer_t *initializer = get_initializer_entry(path);
3587
3588         type_path_entry_t *top = append_to_type_path(path);
3589         top->type              = top_type;
3590
3591         size_t len;
3592
3593         if (is_type_compound(top_type)) {
3594                 compound_t *compound = top_type->compound.compound;
3595                 entity_t   *entry    = compound->members.entities;
3596
3597                 top->compound_entry = entry;
3598                 top->index          = 0;
3599                 len                 = get_compound_member_count(&top_type->compound);
3600                 if (entry != NULL) {
3601                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3602                         path->top_type = entry->declaration.type;
3603                 }
3604         } else {
3605                 assert(is_type_array(top_type));
3606                 assert(top_type->array.size > 0);
3607
3608                 top->index     = 0;
3609                 path->top_type = top_type->array.element_type;
3610                 len            = top_type->array.size;
3611         }
3612         if (initializer == NULL
3613                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3614                 initializer = create_initializer_compound(len);
3615                 /* we have to set the entry at the 2nd latest path entry... */
3616                 size_t path_len = ARR_LEN(path->path);
3617                 assert(path_len >= 1);
3618                 if (path_len > 1) {
3619                         type_path_entry_t *entry        = & path->path[path_len-2];
3620                         ir_initializer_t  *tinitializer = entry->initializer;
3621                         set_initializer_compound_value(tinitializer, entry->index,
3622                                                        initializer);
3623                 }
3624         }
3625         top->initializer = initializer;
3626 }
3627
3628 static void ascend_from_subtype(type_path_t *path)
3629 {
3630         type_path_entry_t *top = get_type_path_top(path);
3631
3632         path->top_type = top->type;
3633
3634         size_t len = ARR_LEN(path->path);
3635         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3636 }
3637
3638 static void walk_designator(type_path_t *path, const designator_t *designator)
3639 {
3640         /* designators start at current object type */
3641         ARR_RESIZE(type_path_entry_t, path->path, 1);
3642
3643         for ( ; designator != NULL; designator = designator->next) {
3644                 type_path_entry_t *top         = get_type_path_top(path);
3645                 type_t            *orig_type   = top->type;
3646                 type_t            *type        = skip_typeref(orig_type);
3647
3648                 if (designator->symbol != NULL) {
3649                         assert(is_type_compound(type));
3650                         size_t    index  = 0;
3651                         symbol_t *symbol = designator->symbol;
3652
3653                         compound_t *compound = type->compound.compound;
3654                         entity_t   *iter     = compound->members.entities;
3655                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3656                                 if (iter->base.symbol == symbol) {
3657                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3658                                         break;
3659                                 }
3660                         }
3661                         assert(iter != NULL);
3662
3663                         top->type           = orig_type;
3664                         top->compound_entry = iter;
3665                         top->index          = index;
3666                         orig_type           = iter->declaration.type;
3667                 } else {
3668                         expression_t *array_index = designator->array_index;
3669                         assert(designator->array_index != NULL);
3670                         assert(is_type_array(type));
3671
3672                         long index = fold_constant(array_index);
3673                         assert(index >= 0);
3674 #ifndef NDEBUG
3675                         if (type->array.size_constant) {
3676                                 long array_size = type->array.size;
3677                                 assert(index < array_size);
3678                         }
3679 #endif
3680
3681                         top->type  = orig_type;
3682                         top->index = (size_t) index;
3683                         orig_type  = type->array.element_type;
3684                 }
3685                 path->top_type = orig_type;
3686
3687                 if (designator->next != NULL) {
3688                         descend_into_subtype(path);
3689                 }
3690         }
3691
3692         path->invalid  = false;
3693 }
3694
3695 static void advance_current_object(type_path_t *path)
3696 {
3697         if (path->invalid) {
3698                 /* TODO: handle this... */
3699                 panic("invalid initializer in ast2firm (excessive elements)");
3700         }
3701
3702         type_path_entry_t *top = get_type_path_top(path);
3703
3704         type_t *type = skip_typeref(top->type);
3705         if (is_type_union(type)) {
3706                 top->compound_entry = NULL;
3707         } else if (is_type_struct(type)) {
3708                 entity_t *entry = top->compound_entry;
3709
3710                 top->index++;
3711                 entry               = entry->base.next;
3712                 top->compound_entry = entry;
3713                 if (entry != NULL) {
3714                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3715                         path->top_type = entry->declaration.type;
3716                         return;
3717                 }
3718         } else {
3719                 assert(is_type_array(type));
3720
3721                 top->index++;
3722                 if (!type->array.size_constant || top->index < type->array.size) {
3723                         return;
3724                 }
3725         }
3726
3727         /* we're past the last member of the current sub-aggregate, try if we
3728          * can ascend in the type hierarchy and continue with another subobject */
3729         size_t len = ARR_LEN(path->path);
3730
3731         if (len > 1) {
3732                 ascend_from_subtype(path);
3733                 advance_current_object(path);
3734         } else {
3735                 path->invalid = true;
3736         }
3737 }
3738
3739
3740 static ir_initializer_t *create_ir_initializer(
3741                 const initializer_t *initializer, type_t *type);
3742
3743 static ir_initializer_t *create_ir_initializer_value(
3744                 const initializer_value_t *initializer)
3745 {
3746         if (is_type_compound(initializer->value->base.type)) {
3747                 panic("initializer creation for compounds not implemented yet");
3748         }
3749         ir_node *value = expression_to_firm(initializer->value);
3750         type_t  *type  = initializer->value->base.type;
3751         ir_mode *mode  = get_ir_mode_storage(type);
3752         value          = create_conv(NULL, value, mode);
3753         return create_initializer_const(value);
3754 }
3755
3756 /** test wether type can be initialized by a string constant */
3757 static bool is_string_type(type_t *type)
3758 {
3759         type_t *inner;
3760         if (is_type_pointer(type)) {
3761                 inner = skip_typeref(type->pointer.points_to);
3762         } else if(is_type_array(type)) {
3763                 inner = skip_typeref(type->array.element_type);
3764         } else {
3765                 return false;
3766         }
3767
3768         return is_type_integer(inner);
3769 }
3770
3771 static ir_initializer_t *create_ir_initializer_list(
3772                 const initializer_list_t *initializer, type_t *type)
3773 {
3774         type_path_t path;
3775         memset(&path, 0, sizeof(path));
3776         path.top_type = type;
3777         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3778
3779         descend_into_subtype(&path);
3780
3781         for (size_t i = 0; i < initializer->len; ++i) {
3782                 const initializer_t *sub_initializer = initializer->initializers[i];
3783
3784                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3785                         walk_designator(&path, sub_initializer->designator.designator);
3786                         continue;
3787                 }
3788
3789                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3790                         /* we might have to descend into types until we're at a scalar
3791                          * type */
3792                         while(true) {
3793                                 type_t *orig_top_type = path.top_type;
3794                                 type_t *top_type      = skip_typeref(orig_top_type);
3795
3796                                 if (is_type_scalar(top_type))
3797                                         break;
3798                                 descend_into_subtype(&path);
3799                         }
3800                 } else if (sub_initializer->kind == INITIALIZER_STRING
3801                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3802                         /* we might have to descend into types until we're at a scalar
3803                          * type */
3804                         while (true) {
3805                                 type_t *orig_top_type = path.top_type;
3806                                 type_t *top_type      = skip_typeref(orig_top_type);
3807
3808                                 if (is_string_type(top_type))
3809                                         break;
3810                                 descend_into_subtype(&path);
3811                         }
3812                 }
3813
3814                 ir_initializer_t *sub_irinitializer
3815                         = create_ir_initializer(sub_initializer, path.top_type);
3816
3817                 size_t path_len = ARR_LEN(path.path);
3818                 assert(path_len >= 1);
3819                 type_path_entry_t *entry        = & path.path[path_len-1];
3820                 ir_initializer_t  *tinitializer = entry->initializer;
3821                 set_initializer_compound_value(tinitializer, entry->index,
3822                                                sub_irinitializer);
3823
3824                 advance_current_object(&path);
3825         }
3826
3827         assert(ARR_LEN(path.path) >= 1);
3828         ir_initializer_t *result = path.path[0].initializer;
3829         DEL_ARR_F(path.path);
3830
3831         return result;
3832 }
3833
3834 static ir_initializer_t *create_ir_initializer_string(
3835                 const initializer_string_t *initializer, type_t *type)
3836 {
3837         type = skip_typeref(type);
3838
3839         size_t            string_len    = initializer->string.size;
3840         assert(type->kind == TYPE_ARRAY);
3841         assert(type->array.size_constant);
3842         size_t            len           = type->array.size;
3843         ir_initializer_t *irinitializer = create_initializer_compound(len);
3844
3845         const char *string = initializer->string.begin;
3846         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3847
3848         for (size_t i = 0; i < len; ++i) {
3849                 char c = 0;
3850                 if (i < string_len)
3851                         c = string[i];
3852
3853                 tarval           *tv = new_tarval_from_long(c, mode);
3854                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3855
3856                 set_initializer_compound_value(irinitializer, i, char_initializer);
3857         }
3858
3859         return irinitializer;
3860 }
3861
3862 static ir_initializer_t *create_ir_initializer_wide_string(
3863                 const initializer_wide_string_t *initializer, type_t *type)
3864 {
3865         size_t            string_len    = initializer->string.size;
3866         assert(type->kind == TYPE_ARRAY);
3867         assert(type->array.size_constant);
3868         size_t            len           = type->array.size;
3869         ir_initializer_t *irinitializer = create_initializer_compound(len);
3870
3871         const wchar_rep_t *string = initializer->string.begin;
3872         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3873
3874         for (size_t i = 0; i < len; ++i) {
3875                 wchar_rep_t c = 0;
3876                 if (i < string_len) {
3877                         c = string[i];
3878                 }
3879                 tarval *tv = new_tarval_from_long(c, mode);
3880                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3881
3882                 set_initializer_compound_value(irinitializer, i, char_initializer);
3883         }
3884
3885         return irinitializer;
3886 }
3887
3888 static ir_initializer_t *create_ir_initializer(
3889                 const initializer_t *initializer, type_t *type)
3890 {
3891         switch(initializer->kind) {
3892                 case INITIALIZER_STRING:
3893                         return create_ir_initializer_string(&initializer->string, type);
3894
3895                 case INITIALIZER_WIDE_STRING:
3896                         return create_ir_initializer_wide_string(&initializer->wide_string,
3897                                                                  type);
3898
3899                 case INITIALIZER_LIST:
3900                         return create_ir_initializer_list(&initializer->list, type);
3901
3902                 case INITIALIZER_VALUE:
3903                         return create_ir_initializer_value(&initializer->value);
3904
3905                 case INITIALIZER_DESIGNATOR:
3906                         panic("unexpected designator initializer found");
3907         }
3908         panic("unknown initializer");
3909 }
3910
3911 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3912                 ir_node *base_addr)
3913 {
3914         if (is_atomic_type(type)) {
3915                 ir_mode *mode = get_type_mode(type);
3916                 tarval  *zero = get_mode_null(mode);
3917                 ir_node *cnst = new_d_Const(dbgi, zero);
3918
3919                 /* TODO: bitfields */
3920                 ir_node *mem    = get_store();
3921                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3922                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3923                 set_store(proj_m);
3924         } else {
3925                 assert(is_compound_type(type));
3926
3927                 int n_members;
3928                 if (is_Array_type(type)) {
3929                         assert(has_array_upper_bound(type, 0));
3930                         n_members = get_array_upper_bound_int(type, 0);
3931                 } else {
3932                         n_members = get_compound_n_members(type);
3933                 }
3934
3935                 for (int i = 0; i < n_members; ++i) {
3936                         ir_node *addr;
3937                         ir_type *irtype;
3938                         if (is_Array_type(type)) {
3939                                 ir_entity *entity   = get_array_element_entity(type);
3940                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3941                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3942                                 ir_node   *in[1]    = { cnst };
3943                                 irtype = get_array_element_type(type);
3944                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3945                         } else {
3946                                 ir_entity *member = get_compound_member(type, i);
3947
3948                                 irtype = get_entity_type(member);
3949                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3950                         }
3951
3952                         create_dynamic_null_initializer(irtype, dbgi, addr);
3953                 }
3954         }
3955 }
3956
3957 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3958                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3959 {
3960         switch(get_initializer_kind(initializer)) {
3961         case IR_INITIALIZER_NULL: {
3962                 create_dynamic_null_initializer(type, dbgi, base_addr);
3963                 return;
3964         }
3965         case IR_INITIALIZER_CONST: {
3966                 ir_node *node     = get_initializer_const_value(initializer);
3967                 ir_mode *mode     = get_irn_mode(node);
3968                 ir_type *ent_type = get_entity_type(entity);
3969
3970                 /* is it a bitfield type? */
3971                 if (is_Primitive_type(ent_type) &&
3972                                 get_primitive_base_type(ent_type) != NULL) {
3973                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3974                         return;
3975                 }
3976
3977                 assert(get_type_mode(type) == mode);
3978                 ir_node *mem    = get_store();
3979                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3980                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3981                 set_store(proj_m);
3982                 return;
3983         }
3984         case IR_INITIALIZER_TARVAL: {
3985                 tarval  *tv       = get_initializer_tarval_value(initializer);
3986                 ir_mode *mode     = get_tarval_mode(tv);
3987                 ir_node *cnst     = new_d_Const(dbgi, tv);
3988                 ir_type *ent_type = get_entity_type(entity);
3989
3990                 /* is it a bitfield type? */
3991                 if (is_Primitive_type(ent_type) &&
3992                                 get_primitive_base_type(ent_type) != NULL) {
3993                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3994                         return;
3995                 }
3996
3997                 assert(get_type_mode(type) == mode);
3998                 ir_node *mem    = get_store();
3999                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4000                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4001                 set_store(proj_m);
4002                 return;
4003         }
4004         case IR_INITIALIZER_COMPOUND: {
4005                 assert(is_compound_type(type));
4006                 int n_members;
4007                 if (is_Array_type(type)) {
4008                         assert(has_array_upper_bound(type, 0));
4009                         n_members = get_array_upper_bound_int(type, 0);
4010                 } else {
4011                         n_members = get_compound_n_members(type);
4012                 }
4013
4014                 if (get_initializer_compound_n_entries(initializer)
4015                                 != (unsigned) n_members)
4016                         panic("initializer doesn't match compound type");
4017
4018                 for (int i = 0; i < n_members; ++i) {
4019                         ir_node   *addr;
4020                         ir_type   *irtype;
4021                         ir_entity *sub_entity;
4022                         if (is_Array_type(type)) {
4023                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
4024                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4025                                 ir_node   *in[1]    = { cnst };
4026                                 irtype     = get_array_element_type(type);
4027                                 sub_entity = get_array_element_entity(type);
4028                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4029                                                        sub_entity);
4030                         } else {
4031                                 sub_entity = get_compound_member(type, i);
4032                                 irtype     = get_entity_type(sub_entity);
4033                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4034                                                              sub_entity);
4035                         }
4036
4037                         ir_initializer_t *sub_init
4038                                 = get_initializer_compound_value(initializer, i);
4039
4040                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4041                                                        addr);
4042                 }
4043                 return;
4044         }
4045         }
4046
4047         panic("invalid IR_INITIALIZER found");
4048 }
4049
4050 static void create_dynamic_initializer(ir_initializer_t *initializer,
4051                 dbg_info *dbgi, ir_entity *entity)
4052 {
4053         ir_node *frame     = get_local_frame(entity);
4054         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4055         ir_type *type      = get_entity_type(entity);
4056
4057         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4058 }
4059
4060 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4061                                      ir_entity *entity, type_t *type)
4062 {
4063         ir_node *memory = get_store();
4064         ir_node *nomem  = new_NoMem();
4065         ir_node *frame  = get_irg_frame(current_ir_graph);
4066         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4067
4068         if (initializer->kind == INITIALIZER_VALUE) {
4069                 initializer_value_t *initializer_value = &initializer->value;
4070
4071                 ir_node *value = expression_to_firm(initializer_value->value);
4072                 type = skip_typeref(type);
4073                 assign_value(dbgi, addr, type, value);
4074                 return;
4075         }
4076
4077         if (!is_constant_initializer(initializer)) {
4078                 ir_initializer_t *irinitializer
4079                         = create_ir_initializer(initializer, type);
4080
4081                 create_dynamic_initializer(irinitializer, dbgi, entity);
4082                 return;
4083         }
4084
4085         /* create the ir_initializer */
4086         ir_graph *const old_current_ir_graph = current_ir_graph;
4087         current_ir_graph = get_const_code_irg();
4088
4089         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4090
4091         assert(current_ir_graph == get_const_code_irg());
4092         current_ir_graph = old_current_ir_graph;
4093
4094         /* create a "template" entity which is copied to the entity on the stack */
4095         ident     *const id          = id_unique("initializer.%u");
4096         ir_type   *const irtype      = get_ir_type(type);
4097         ir_type   *const global_type = get_glob_type();
4098         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4099         set_entity_ld_ident(init_entity, id);
4100
4101         set_entity_variability(init_entity, variability_initialized);
4102         set_entity_visibility(init_entity, visibility_local);
4103         set_entity_allocation(init_entity, allocation_static);
4104
4105         set_entity_initializer(init_entity, irinitializer);
4106
4107         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4108         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4109
4110         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4111         set_store(copyb_mem);
4112 }
4113
4114 static void create_initializer_local_variable_entity(entity_t *entity)
4115 {
4116         assert(entity->kind == ENTITY_VARIABLE);
4117         initializer_t *initializer = entity->variable.initializer;
4118         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4119         ir_entity     *irentity    = entity->variable.v.entity;
4120         type_t        *type        = entity->declaration.type;
4121
4122         type = get_aligned_type(type, entity->variable.alignment);
4123         create_local_initializer(initializer, dbgi, irentity, type);
4124 }
4125
4126 static void create_variable_initializer(entity_t *entity)
4127 {
4128         assert(entity->kind == ENTITY_VARIABLE);
4129         initializer_t *initializer = entity->variable.initializer;
4130         if (initializer == NULL)
4131                 return;
4132
4133         declaration_kind_t declaration_kind
4134                 = (declaration_kind_t) entity->declaration.kind;
4135         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4136                 create_initializer_local_variable_entity(entity);
4137                 return;
4138         }
4139
4140         type_t            *type = entity->declaration.type;
4141         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4142
4143         if (initializer->kind == INITIALIZER_VALUE) {
4144                 initializer_value_t *initializer_value = &initializer->value;
4145                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4146
4147                 ir_node *value = expression_to_firm(initializer_value->value);
4148
4149                 type_t  *type = initializer_value->value->base.type;
4150                 ir_mode *mode = get_ir_mode_storage(type);
4151                 value = create_conv(dbgi, value, mode);
4152                 value = do_strict_conv(dbgi, value);
4153
4154                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4155                         set_value(entity->variable.v.value_number, value);
4156                 } else {
4157                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4158
4159                         ir_entity *irentity = entity->variable.v.entity;
4160
4161                         if (tq & TYPE_QUALIFIER_CONST) {
4162                                 set_entity_variability(irentity, variability_constant);
4163                         } else {
4164                                 set_entity_variability(irentity, variability_initialized);
4165                         }
4166                         set_atomic_ent_value(irentity, value);
4167                 }
4168         } else {
4169                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4170                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4171
4172                 ir_entity        *irentity        = entity->variable.v.entity;
4173                 ir_initializer_t *irinitializer
4174                         = create_ir_initializer(initializer, type);
4175
4176                 if (tq & TYPE_QUALIFIER_CONST) {
4177                         set_entity_variability(irentity, variability_constant);
4178                 } else {
4179                         set_entity_variability(irentity, variability_initialized);
4180                 }
4181                 set_entity_initializer(irentity, irinitializer);
4182         }
4183 }
4184
4185 static void create_variable_length_array(entity_t *entity)
4186 {
4187         assert(entity->kind == ENTITY_VARIABLE);
4188         assert(entity->variable.initializer == NULL);
4189
4190         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4191         entity->variable.v.vla_base = NULL;
4192
4193         /* TODO: record VLA somewhere so we create the free node when we leave
4194          * it's scope */
4195 }
4196
4197 static void allocate_variable_length_array(entity_t *entity)
4198 {
4199         assert(entity->kind == ENTITY_VARIABLE);
4200         assert(entity->variable.initializer == NULL);
4201         assert(get_cur_block() != NULL);
4202
4203         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4204         type_t   *type      = entity->declaration.type;
4205         ir_type  *el_type   = get_ir_type(type->array.element_type);
4206
4207         /* make sure size_node is calculated */
4208         get_type_size(type);
4209         ir_node  *elems = type->array.size_node;
4210         ir_node  *mem   = get_store();
4211         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4212
4213         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4214         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4215         set_store(proj_m);
4216
4217         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4218         entity->variable.v.vla_base = addr;
4219 }
4220
4221 /**
4222  * Creates a Firm local variable from a declaration.
4223  */
4224 static void create_local_variable(entity_t *entity)
4225 {
4226         assert(entity->kind == ENTITY_VARIABLE);
4227         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4228
4229         bool needs_entity = entity->variable.address_taken;
4230         type_t *type = skip_typeref(entity->declaration.type);
4231
4232         /* is it a variable length array? */
4233         if (is_type_array(type) && !type->array.size_constant) {
4234                 create_variable_length_array(entity);
4235                 return;
4236         } else if (is_type_array(type) || is_type_compound(type)) {
4237                 needs_entity = true;
4238         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4239                 needs_entity = true;
4240         }
4241
4242         if (needs_entity) {
4243                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4244                 create_variable_entity(entity,
4245                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4246                                        frame_type);
4247         } else {
4248                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4249                 entity->variable.v.value_number = next_value_number_function;
4250                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4251                                         entity);
4252                 ++next_value_number_function;
4253         }
4254 }
4255
4256 static void create_local_static_variable(entity_t *entity)
4257 {
4258         assert(entity->kind == ENTITY_VARIABLE);
4259         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4260
4261         type_t    *type = skip_typeref(entity->declaration.type);
4262         type            = get_aligned_type(type, entity->variable.alignment);
4263
4264         ir_type   *const var_type = entity->variable.thread_local ?
4265                 get_tls_type() : get_glob_type();
4266         ir_type   *const irtype   = get_ir_type(type);
4267         dbg_info  *const dbgi     = get_dbg_info(&entity->base.source_position);
4268
4269         size_t l = strlen(entity->base.symbol->string);
4270         char   buf[l + sizeof(".%u")];
4271         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4272         ident     *const id = id_unique(buf);
4273
4274         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4275
4276         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4277                 set_entity_volatility(irentity, volatility_is_volatile);
4278         }
4279
4280         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4281         entity->variable.v.entity = irentity;
4282
4283         set_entity_ld_ident(irentity, id);
4284         set_entity_variability(irentity, variability_uninitialized);
4285         set_entity_visibility(irentity, visibility_local);
4286         set_entity_allocation(irentity, entity->variable.thread_local ?
4287                 allocation_automatic : allocation_static);
4288
4289         ir_graph *const old_current_ir_graph = current_ir_graph;
4290         current_ir_graph = get_const_code_irg();
4291
4292         create_variable_initializer(entity);
4293
4294         assert(current_ir_graph == get_const_code_irg());
4295         current_ir_graph = old_current_ir_graph;
4296 }
4297
4298
4299
4300 static void return_statement_to_firm(return_statement_t *statement)
4301 {
4302         if (get_cur_block() == NULL)
4303                 return;
4304
4305         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4306         type_t   *type        = current_function_entity->declaration.type;
4307         ir_type  *func_irtype = get_ir_type(type);
4308
4309
4310         ir_node *in[1];
4311         int      in_len;
4312         if (get_method_n_ress(func_irtype) > 0) {
4313                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4314
4315                 if (statement->value != NULL) {
4316                         ir_node *node = expression_to_firm(statement->value);
4317                         if (!is_compound_type(res_type)) {
4318                                 type_t  *type = statement->value->base.type;
4319                                 ir_mode *mode = get_ir_mode_storage(type);
4320                                 node          = create_conv(dbgi, node, mode);
4321                                 node          = do_strict_conv(dbgi, node);
4322                         }
4323                         in[0] = node;
4324                 } else {
4325                         ir_mode *mode;
4326                         if (is_compound_type(res_type)) {
4327                                 mode = mode_P_data;
4328                         } else {
4329                                 mode = get_type_mode(res_type);
4330                         }
4331                         in[0] = new_Unknown(mode);
4332                 }
4333                 in_len = 1;
4334         } else {
4335                 /* build return_value for its side effects */
4336                 if (statement->value != NULL) {
4337                         expression_to_firm(statement->value);
4338                 }
4339                 in_len = 0;
4340         }
4341
4342         ir_node  *store = get_store();
4343         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4344
4345         ir_node *end_block = get_irg_end_block(current_ir_graph);
4346         add_immBlock_pred(end_block, ret);
4347
4348         set_cur_block(NULL);
4349 }
4350
4351 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4352 {
4353         if (get_cur_block() == NULL)
4354                 return NULL;
4355
4356         return expression_to_firm(statement->expression);
4357 }
4358
4359 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4360 {
4361         entity_t *entity = compound->scope.entities;
4362         for ( ; entity != NULL; entity = entity->base.next) {
4363                 if (!is_declaration(entity))
4364                         continue;
4365
4366                 create_local_declaration(entity);
4367         }
4368
4369         ir_node     *result    = NULL;
4370         statement_t *statement = compound->statements;
4371         for ( ; statement != NULL; statement = statement->base.next) {
4372                 if (statement->base.next == NULL
4373                                 && statement->kind == STATEMENT_EXPRESSION) {
4374                         result = expression_statement_to_firm(
4375                                         &statement->expression);
4376                         break;
4377                 }
4378                 statement_to_firm(statement);
4379         }
4380
4381         return result;
4382 }
4383
4384 static void create_global_variable(entity_t *entity)
4385 {
4386         assert(entity->kind == ENTITY_VARIABLE);
4387
4388         ir_visibility vis;
4389         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4390                 case STORAGE_CLASS_STATIC: vis = visibility_local;              break;
4391                 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4392                 case STORAGE_CLASS_NONE:   vis = visibility_external_visible;   break;
4393
4394                 default: panic("Invalid storage class for global variable");
4395         }
4396
4397         ir_type *var_type = entity->variable.thread_local ?
4398                 get_tls_type() : get_glob_type();
4399         create_variable_entity(entity,
4400                         DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4401         set_entity_visibility(entity->variable.v.entity, vis);
4402 }
4403
4404 static void create_local_declaration(entity_t *entity)
4405 {
4406         assert(is_declaration(entity));
4407
4408         /* construct type */
4409         (void) get_ir_type(entity->declaration.type);
4410         if (entity->base.symbol == NULL) {
4411                 return;
4412         }
4413
4414         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4415         case STORAGE_CLASS_STATIC:
4416                 create_local_static_variable(entity);
4417                 return;
4418         case STORAGE_CLASS_EXTERN:
4419                 if (entity->kind == ENTITY_FUNCTION) {
4420                         assert(entity->function.statement == NULL);
4421                         get_function_entity(entity);
4422                 } else {
4423                         create_global_variable(entity);
4424                         create_variable_initializer(entity);
4425                 }
4426                 return;
4427         case STORAGE_CLASS_NONE:
4428         case STORAGE_CLASS_AUTO:
4429         case STORAGE_CLASS_REGISTER:
4430                 if (entity->kind == ENTITY_FUNCTION) {
4431                         if (entity->function.statement != NULL) {
4432                                 get_function_entity(entity);
4433                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4434                                 enqueue_inner_function(entity);
4435                         } else {
4436                                 get_function_entity(entity);
4437                         }
4438                 } else {
4439                         create_local_variable(entity);
4440                 }
4441                 return;
4442         case STORAGE_CLASS_TYPEDEF:
4443                 break;
4444         }
4445         panic("invalid storage class found");
4446 }
4447
4448 static void initialize_local_declaration(entity_t *entity)
4449 {
4450         if (entity->base.symbol == NULL)
4451                 return;
4452
4453         switch ((declaration_kind_t) entity->declaration.kind) {
4454         case DECLARATION_KIND_LOCAL_VARIABLE:
4455         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4456                 create_variable_initializer(entity);
4457                 return;
4458
4459         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4460                 allocate_variable_length_array(entity);
4461                 return;
4462
4463         case DECLARATION_KIND_COMPOUND_MEMBER:
4464         case DECLARATION_KIND_GLOBAL_VARIABLE:
4465         case DECLARATION_KIND_FUNCTION:
4466         case DECLARATION_KIND_INNER_FUNCTION:
4467                 return;
4468
4469         case DECLARATION_KIND_PARAMETER:
4470         case DECLARATION_KIND_PARAMETER_ENTITY:
4471                 panic("can't initialize parameters");
4472
4473         case DECLARATION_KIND_UNKNOWN:
4474                 panic("can't initialize unknown declaration");
4475         }
4476         panic("invalid declaration kind");
4477 }
4478
4479 static void declaration_statement_to_firm(declaration_statement_t *statement)
4480 {
4481         entity_t *entity = statement->declarations_begin;
4482         if (entity == NULL)
4483                 return;
4484
4485         entity_t *const last = statement->declarations_end;
4486         for ( ;; entity = entity->base.next) {
4487                 if (is_declaration(entity)) {
4488                         initialize_local_declaration(entity);
4489                 } else if (entity->kind == ENTITY_TYPEDEF) {
4490                         type_t *const type = skip_typeref(entity->typedefe.type);
4491                         if (is_type_array(type) && type->array.is_vla)
4492                                 get_vla_size(&type->array);
4493                 }
4494                 if (entity == last)
4495                         break;
4496         }
4497 }
4498
4499 static void if_statement_to_firm(if_statement_t *statement)
4500 {
4501         ir_node *cur_block = get_cur_block();
4502
4503         ir_node *fallthrough_block = NULL;
4504
4505         /* the true (blocks) */
4506         ir_node *true_block = NULL;
4507         if (statement->true_statement != NULL) {
4508                 true_block = new_immBlock();
4509                 set_cur_block(true_block);
4510                 statement_to_firm(statement->true_statement);
4511                 if (get_cur_block() != NULL) {
4512                         ir_node *jmp = new_Jmp();
4513                         if (fallthrough_block == NULL)
4514                                 fallthrough_block = new_immBlock();
4515                         add_immBlock_pred(fallthrough_block, jmp);
4516                 }
4517         }
4518
4519         /* the false (blocks) */
4520         ir_node *false_block = NULL;
4521         if (statement->false_statement != NULL) {
4522                 false_block = new_immBlock();
4523                 set_cur_block(false_block);
4524
4525                 statement_to_firm(statement->false_statement);
4526                 if (get_cur_block() != NULL) {
4527                         ir_node *jmp = new_Jmp();
4528                         if (fallthrough_block == NULL)
4529                                 fallthrough_block = new_immBlock();
4530                         add_immBlock_pred(fallthrough_block, jmp);
4531                 }
4532         }
4533
4534         /* create the condition */
4535         if (cur_block != NULL) {
4536                 if (true_block == NULL || false_block == NULL) {
4537                         if (fallthrough_block == NULL)
4538                                 fallthrough_block = new_immBlock();
4539                         if (true_block == NULL)
4540                                 true_block = fallthrough_block;
4541                         if (false_block == NULL)
4542                                 false_block = fallthrough_block;
4543                 }
4544
4545                 set_cur_block(cur_block);
4546                 create_condition_evaluation(statement->condition, true_block,
4547                                             false_block);
4548         }
4549
4550         mature_immBlock(true_block);
4551         if (false_block != fallthrough_block && false_block != NULL) {
4552                 mature_immBlock(false_block);
4553         }
4554         if (fallthrough_block != NULL) {
4555                 mature_immBlock(fallthrough_block);
4556         }
4557
4558         set_cur_block(fallthrough_block);
4559 }
4560
4561 static void while_statement_to_firm(while_statement_t *statement)
4562 {
4563         ir_node *jmp = NULL;
4564         if (get_cur_block() != NULL) {
4565                 jmp = new_Jmp();
4566         }
4567
4568         /* create the header block */
4569         ir_node *header_block = new_immBlock();
4570         if (jmp != NULL) {
4571                 add_immBlock_pred(header_block, jmp);
4572         }
4573
4574         /* the loop body */
4575         ir_node *old_continue_label = continue_label;
4576         ir_node *old_break_label    = break_label;
4577         continue_label              = header_block;
4578         break_label                 = NULL;
4579
4580         ir_node *body_block = new_immBlock();
4581         set_cur_block(body_block);
4582         statement_to_firm(statement->body);
4583         ir_node *false_block = break_label;
4584
4585         assert(continue_label == header_block);
4586         continue_label = old_continue_label;
4587         break_label    = old_break_label;
4588
4589         if (get_cur_block() != NULL) {
4590                 jmp = new_Jmp();
4591                 add_immBlock_pred(header_block, jmp);
4592         }
4593
4594         /* shortcut for while(true) */
4595         if (is_constant_expression(statement->condition)
4596                         && fold_constant(statement->condition) != 0) {
4597                 set_cur_block(header_block);
4598                 ir_node *header_jmp = new_Jmp();
4599                 add_immBlock_pred(body_block, header_jmp);
4600
4601                 keep_alive(body_block);
4602                 keep_all_memory(body_block);
4603                 set_cur_block(body_block);
4604         } else {
4605                 if (false_block == NULL) {
4606                         false_block = new_immBlock();
4607                 }
4608
4609                 /* create the condition */
4610                 set_cur_block(header_block);
4611
4612                 create_condition_evaluation(statement->condition, body_block,
4613                                             false_block);
4614         }
4615
4616         mature_immBlock(body_block);
4617         mature_immBlock(header_block);
4618         if (false_block != NULL) {
4619                 mature_immBlock(false_block);
4620         }
4621
4622         set_cur_block(false_block);
4623 }
4624
4625 static void do_while_statement_to_firm(do_while_statement_t *statement)
4626 {
4627         ir_node *jmp = NULL;
4628         if (get_cur_block() != NULL) {
4629                 jmp = new_Jmp();
4630         }
4631
4632         /* create the header block */
4633         ir_node *header_block = new_immBlock();
4634
4635         /* the loop body */
4636         ir_node *body_block = new_immBlock();
4637         if (jmp != NULL) {
4638                 add_immBlock_pred(body_block, jmp);
4639         }
4640
4641         ir_node *old_continue_label = continue_label;
4642         ir_node *old_break_label    = break_label;
4643         continue_label              = header_block;
4644         break_label                 = NULL;
4645
4646         set_cur_block(body_block);
4647         statement_to_firm(statement->body);
4648         ir_node *false_block = break_label;
4649
4650         assert(continue_label == header_block);
4651         continue_label = old_continue_label;
4652         break_label    = old_break_label;
4653
4654         if (get_cur_block() != NULL) {
4655                 ir_node *body_jmp = new_Jmp();
4656                 add_immBlock_pred(header_block, body_jmp);
4657                 mature_immBlock(header_block);
4658         }
4659
4660         if (false_block == NULL) {
4661                 false_block = new_immBlock();
4662         }
4663
4664         /* create the condition */
4665         set_cur_block(header_block);
4666
4667         create_condition_evaluation(statement->condition, body_block, false_block);
4668         mature_immBlock(body_block);
4669         mature_immBlock(header_block);
4670         mature_immBlock(false_block);
4671
4672         set_cur_block(false_block);
4673 }
4674
4675 static void for_statement_to_firm(for_statement_t *statement)
4676 {
4677         ir_node *jmp = NULL;
4678
4679         /* create declarations */
4680         entity_t *entity = statement->scope.entities;
4681         for ( ; entity != NULL; entity = entity->base.next) {
4682                 if (!is_declaration(entity))
4683                         continue;
4684
4685                 create_local_declaration(entity);
4686         }
4687
4688         if (get_cur_block() != NULL) {
4689                 entity = statement->scope.entities;
4690                 for ( ; entity != NULL; entity = entity->base.next) {
4691                         if (!is_declaration(entity))
4692                                 continue;
4693
4694                         initialize_local_declaration(entity);
4695                 }
4696
4697                 if (statement->initialisation != NULL) {
4698                         expression_to_firm(statement->initialisation);
4699                 }
4700
4701                 jmp = new_Jmp();
4702         }
4703
4704
4705         /* create the step block */
4706         ir_node *const step_block = new_immBlock();
4707         set_cur_block(step_block);
4708         if (statement->step != NULL) {
4709                 expression_to_firm(statement->step);
4710         }
4711         ir_node *const step_jmp = new_Jmp();
4712
4713         /* create the header block */
4714         ir_node *const header_block = new_immBlock();
4715         set_cur_block(header_block);
4716         if (jmp != NULL) {
4717                 add_immBlock_pred(header_block, jmp);
4718         }
4719         add_immBlock_pred(header_block, step_jmp);
4720
4721         /* the false block */
4722         ir_node *const false_block = new_immBlock();
4723
4724         /* the loop body */
4725         ir_node *body_block;
4726         if (statement->body != NULL) {
4727                 ir_node *const old_continue_label = continue_label;
4728                 ir_node *const old_break_label    = break_label;
4729                 continue_label = step_block;
4730                 break_label    = false_block;
4731
4732                 body_block = new_immBlock();
4733                 set_cur_block(body_block);
4734                 statement_to_firm(statement->body);
4735
4736                 assert(continue_label == step_block);
4737                 assert(break_label    == false_block);
4738                 continue_label = old_continue_label;
4739                 break_label    = old_break_label;
4740
4741                 if (get_cur_block() != NULL) {
4742                         jmp = new_Jmp();
4743                         add_immBlock_pred(step_block, jmp);
4744                 }
4745         } else {
4746                 body_block = step_block;
4747         }
4748
4749         /* create the condition */
4750         set_cur_block(header_block);
4751         if (statement->condition != NULL) {
4752                 create_condition_evaluation(statement->condition, body_block,
4753                                             false_block);
4754         } else {
4755                 keep_alive(header_block);
4756                 keep_all_memory(header_block);
4757                 jmp = new_Jmp();
4758                 add_immBlock_pred(body_block, jmp);
4759         }
4760
4761         mature_immBlock(body_block);
4762         mature_immBlock(false_block);
4763         mature_immBlock(step_block);
4764         mature_immBlock(header_block);
4765         mature_immBlock(false_block);
4766
4767         set_cur_block(false_block);
4768 }
4769
4770 static void create_jump_statement(const statement_t *statement,
4771                                   ir_node *target_block)
4772 {
4773         if (get_cur_block() == NULL)
4774                 return;
4775
4776         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4777         ir_node  *jump = new_d_Jmp(dbgi);
4778         add_immBlock_pred(target_block, jump);
4779
4780         set_cur_block(NULL);
4781 }
4782
4783 static ir_node *get_break_label(void)
4784 {
4785         if (break_label == NULL) {
4786                 break_label = new_immBlock();
4787         }
4788         return break_label;
4789 }
4790
4791 static void switch_statement_to_firm(switch_statement_t *statement)
4792 {
4793         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4794
4795         ir_node *expression  = expression_to_firm(statement->expression);
4796         ir_node *cond        = new_d_Cond(dbgi, expression);
4797
4798         set_cur_block(NULL);
4799
4800         ir_node *const old_switch_cond       = current_switch_cond;
4801         ir_node *const old_break_label       = break_label;
4802         const bool     old_saw_default_label = saw_default_label;
4803         saw_default_label                    = false;
4804         current_switch_cond                  = cond;
4805         break_label                          = NULL;
4806         switch_statement_t *const old_switch = current_switch;
4807         current_switch                       = statement;
4808
4809         /* determine a free number for the default label */
4810         unsigned long num_cases = 0;
4811         long def_nr = 0;
4812         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4813                 if (l->expression == NULL) {
4814                         /* default case */
4815                         continue;
4816                 }
4817                 if (l->last_case >= l->first_case)
4818                         num_cases += l->last_case - l->first_case + 1;
4819                 if (l->last_case > def_nr)
4820                         def_nr = l->last_case;
4821         }
4822
4823         if (def_nr == INT_MAX) {
4824                 /* Bad: an overflow will occurr, we cannot be sure that the
4825                  * maximum + 1 is a free number. Scan the values a second
4826                  * time to find a free number.
4827                  */
4828                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4829
4830                 memset(bits, 0, (num_cases + 7) >> 3);
4831                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4832                         if (l->expression == NULL) {
4833                                 /* default case */
4834                                 continue;
4835                         }
4836                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4837                         if (start < num_cases && l->last_case >= 0) {
4838                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4839                                         (unsigned long)l->last_case : num_cases - 1;
4840                                 for (unsigned long cns = start; cns <= end; ++cns) {
4841                                         bits[cns >> 3] |= (1 << (cns & 7));
4842                                 }
4843                         }
4844                 }
4845                 /* We look at the first num_cases constants:
4846                  * Either they are densed, so we took the last (num_cases)
4847                  * one, or they are non densed, so we will find one free
4848                  * there...
4849                  */
4850                 unsigned long i;
4851                 for (i = 0; i < num_cases; ++i)
4852                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4853                                 break;
4854
4855                 free(bits);
4856                 def_nr = i;
4857         } else {
4858                 ++def_nr;
4859         }
4860         statement->default_proj_nr = def_nr;
4861
4862         if (statement->body != NULL) {
4863                 statement_to_firm(statement->body);
4864         }
4865
4866         if (get_cur_block() != NULL) {
4867                 ir_node *jmp = new_Jmp();
4868                 add_immBlock_pred(get_break_label(), jmp);
4869         }
4870
4871         if (!saw_default_label) {
4872                 set_cur_block(get_nodes_block(cond));
4873                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4874                                                         statement->default_proj_nr);
4875                 add_immBlock_pred(get_break_label(), proj);
4876         }
4877
4878         if (break_label != NULL) {
4879                 mature_immBlock(break_label);
4880         }
4881         set_cur_block(break_label);
4882
4883         assert(current_switch_cond == cond);
4884         current_switch      = old_switch;
4885         current_switch_cond = old_switch_cond;
4886         break_label         = old_break_label;
4887         saw_default_label   = old_saw_default_label;
4888 }
4889
4890 static void case_label_to_firm(const case_label_statement_t *statement)
4891 {
4892         if (statement->is_empty_range)
4893                 return;
4894
4895         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4896
4897         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4898
4899         ir_node *proj;
4900         ir_node *block     = new_immBlock();
4901
4902         set_cur_block(get_nodes_block(current_switch_cond));
4903         if (statement->expression != NULL) {
4904                 long pn     = statement->first_case;
4905                 long end_pn = statement->last_case;
4906                 assert(pn <= end_pn);
4907                 /* create jumps for all cases in the given range */
4908                 do {
4909                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4910                         add_immBlock_pred(block, proj);
4911                 } while(pn++ < end_pn);
4912         } else {
4913                 saw_default_label = true;
4914                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4915                                          current_switch->default_proj_nr);
4916
4917                 add_immBlock_pred(block, proj);
4918         }
4919
4920         if (fallthrough != NULL) {
4921                 add_immBlock_pred(block, fallthrough);
4922         }
4923         mature_immBlock(block);
4924         set_cur_block(block);
4925
4926         if (statement->statement != NULL) {
4927                 statement_to_firm(statement->statement);
4928         }
4929 }
4930
4931 static void label_to_firm(const label_statement_t *statement)
4932 {
4933         ir_node *block = get_label_block(statement->label);
4934
4935         if (get_cur_block() != NULL) {
4936                 ir_node *jmp = new_Jmp();
4937                 add_immBlock_pred(block, jmp);
4938         }
4939
4940         set_cur_block(block);
4941         keep_alive(block);
4942         keep_all_memory(block);
4943
4944         if (statement->statement != NULL) {
4945                 statement_to_firm(statement->statement);
4946         }
4947 }
4948
4949 static void goto_to_firm(const goto_statement_t *statement)
4950 {
4951         if (get_cur_block() == NULL)
4952                 return;
4953
4954         if (statement->expression) {
4955                 ir_node  *irn  = expression_to_firm(statement->expression);
4956                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4957                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4958
4959                 set_irn_link(ijmp, ijmp_list);
4960                 ijmp_list = ijmp;
4961         } else {
4962                 ir_node *block = get_label_block(statement->label);
4963                 ir_node *jmp   = new_Jmp();
4964                 add_immBlock_pred(block, jmp);
4965         }
4966         set_cur_block(NULL);
4967 }
4968
4969 static void asm_statement_to_firm(const asm_statement_t *statement)
4970 {
4971         bool needs_memory = false;
4972
4973         if (statement->is_volatile) {
4974                 needs_memory = true;
4975         }
4976
4977         size_t         n_clobbers = 0;
4978         asm_clobber_t *clobber    = statement->clobbers;
4979         for ( ; clobber != NULL; clobber = clobber->next) {
4980                 const char *clobber_str = clobber->clobber.begin;
4981
4982                 if (!be_is_valid_clobber(clobber_str)) {
4983                         errorf(&statement->base.source_position,
4984                                    "invalid clobber '%s' specified", clobber->clobber);
4985                         continue;
4986                 }
4987
4988                 if (strcmp(clobber_str, "memory") == 0) {
4989                         needs_memory = true;
4990                         continue;
4991                 }
4992
4993                 ident *id = new_id_from_str(clobber_str);
4994                 obstack_ptr_grow(&asm_obst, id);
4995                 ++n_clobbers;
4996         }
4997         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4998         ident **clobbers = NULL;
4999         if (n_clobbers > 0) {
5000                 clobbers = obstack_finish(&asm_obst);
5001         }
5002
5003         size_t n_inputs  = 0;
5004         asm_argument_t *argument = statement->inputs;
5005         for ( ; argument != NULL; argument = argument->next)
5006                 n_inputs++;
5007         size_t n_outputs = 0;
5008         argument = statement->outputs;
5009         for ( ; argument != NULL; argument = argument->next)
5010                 n_outputs++;
5011
5012         unsigned next_pos = 0;
5013
5014         ir_node *ins[n_inputs + n_outputs + 1];
5015         size_t   in_size = 0;
5016
5017         ir_asm_constraint tmp_in_constraints[n_outputs];
5018
5019         const expression_t *out_exprs[n_outputs];
5020         ir_node            *out_addrs[n_outputs];
5021         size_t              out_size = 0;
5022
5023         argument = statement->outputs;
5024         for ( ; argument != NULL; argument = argument->next) {
5025                 const char *constraints = argument->constraints.begin;
5026                 asm_constraint_flags_t asm_flags
5027                         = be_parse_asm_constraints(constraints);
5028
5029                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5030                         warningf(&statement->base.source_position,
5031                                "some constraints in '%s' are not supported", constraints);
5032                 }
5033                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5034                         errorf(&statement->base.source_position,
5035                                "some constraints in '%s' are invalid", constraints);
5036                         continue;
5037                 }
5038                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5039                         errorf(&statement->base.source_position,
5040                                "no write flag specified for output constraints '%s'",
5041                                constraints);
5042                         continue;
5043                 }
5044
5045                 unsigned pos = next_pos++;
5046                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5047                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5048                         expression_t *expr = argument->expression;
5049                         ir_node      *addr = expression_to_addr(expr);
5050                         /* in+output, construct an artifical same_as constraint on the
5051                          * input */
5052                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5053                                 char     buf[64];
5054                                 ir_node *value = get_value_from_lvalue(expr, addr);
5055
5056                                 snprintf(buf, sizeof(buf), "%u", pos);
5057
5058                                 ir_asm_constraint constraint;
5059                                 constraint.pos              = pos;
5060                                 constraint.constraint       = new_id_from_str(buf);
5061                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5062                                 tmp_in_constraints[in_size] = constraint;
5063                                 ins[in_size] = value;
5064
5065                                 ++in_size;
5066                         }
5067
5068                         out_exprs[out_size] = expr;
5069                         out_addrs[out_size] = addr;
5070                         ++out_size;
5071                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5072                         /* pure memory ops need no input (but we have to make sure we
5073                          * attach to the memory) */
5074                         assert(! (asm_flags &
5075                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5076                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5077                         needs_memory = true;
5078
5079                         /* we need to attach the address to the inputs */
5080                         expression_t *expr = argument->expression;
5081
5082                         ir_asm_constraint constraint;
5083                         constraint.pos              = pos;
5084                         constraint.constraint       = new_id_from_str(constraints);
5085                         constraint.mode             = NULL;
5086                         tmp_in_constraints[in_size] = constraint;
5087
5088                         ins[in_size]          = expression_to_addr(expr);
5089                         ++in_size;
5090                         continue;
5091                 } else {
5092                         errorf(&statement->base.source_position,
5093                                "only modifiers but no place set in constraints '%s'",
5094                                constraints);
5095                         continue;
5096                 }
5097
5098                 ir_asm_constraint constraint;
5099                 constraint.pos        = pos;
5100                 constraint.constraint = new_id_from_str(constraints);
5101                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5102
5103                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5104         }
5105         assert(obstack_object_size(&asm_obst)
5106                         == out_size * sizeof(ir_asm_constraint));
5107         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5108
5109
5110         obstack_grow(&asm_obst, tmp_in_constraints,
5111                      in_size * sizeof(tmp_in_constraints[0]));
5112         /* find and count input and output arguments */
5113         argument = statement->inputs;
5114         for ( ; argument != NULL; argument = argument->next) {
5115                 const char *constraints = argument->constraints.begin;
5116                 asm_constraint_flags_t asm_flags
5117                         = be_parse_asm_constraints(constraints);
5118
5119                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5120                         errorf(&statement->base.source_position,
5121                                "some constraints in '%s' are not supported", constraints);
5122                         continue;
5123                 }
5124                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5125                         errorf(&statement->base.source_position,
5126                                "some constraints in '%s' are invalid", constraints);
5127                         continue;
5128                 }
5129                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5130                         errorf(&statement->base.source_position,
5131                                "write flag specified for input constraints '%s'",
5132                                constraints);
5133                         continue;
5134                 }
5135
5136                 ir_node *input;
5137                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5138                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5139                         /* we can treat this as "normal" input */
5140                         input = expression_to_firm(argument->expression);
5141                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5142                         /* pure memory ops need no input (but we have to make sure we
5143                          * attach to the memory) */
5144                         assert(! (asm_flags &
5145                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5146                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5147                         needs_memory = true;
5148                         input = expression_to_addr(argument->expression);
5149                 } else {
5150                         errorf(&statement->base.source_position,
5151                                "only modifiers but no place set in constraints '%s'",
5152                                constraints);
5153                         continue;
5154                 }
5155
5156                 ir_asm_constraint constraint;
5157                 constraint.pos        = next_pos++;
5158                 constraint.constraint = new_id_from_str(constraints);
5159                 constraint.mode       = get_irn_mode(input);
5160
5161                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5162                 ins[in_size++] = input;
5163         }
5164
5165         if (needs_memory) {
5166                 ir_asm_constraint constraint;
5167                 constraint.pos        = next_pos++;
5168                 constraint.constraint = new_id_from_str("");
5169                 constraint.mode       = mode_M;
5170
5171                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5172                 ins[in_size++] = get_store();
5173         }
5174
5175         assert(obstack_object_size(&asm_obst)
5176                         == in_size * sizeof(ir_asm_constraint));
5177         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5178
5179         /* create asm node */
5180         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5181
5182         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5183
5184         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5185                                   out_size, output_constraints,
5186                                   n_clobbers, clobbers, asm_text);
5187
5188         if (statement->is_volatile) {
5189                 set_irn_pinned(node, op_pin_state_pinned);
5190         } else {
5191                 set_irn_pinned(node, op_pin_state_floats);
5192         }
5193
5194         /* create output projs & connect them */
5195         if (needs_memory) {
5196                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5197                 set_store(projm);
5198         }
5199
5200         size_t i;
5201         for (i = 0; i < out_size; ++i) {
5202                 const expression_t *out_expr = out_exprs[i];
5203                 long                pn       = i;
5204                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5205                 ir_node            *proj     = new_Proj(node, mode, pn);
5206                 ir_node            *addr     = out_addrs[i];
5207
5208                 set_value_for_expression_addr(out_expr, proj, addr);
5209         }
5210 }
5211
5212 static void     ms_try_statement_to_firm(ms_try_statement_t *statement)
5213 {
5214         statement_to_firm(statement->try_statement);
5215         warningf(&statement->base.source_position, "structured exception handling ignored");
5216 }
5217
5218 static void     leave_statement_to_firm(leave_statement_t *statement)
5219 {
5220         errorf(&statement->base.source_position, "__leave not supported yet");
5221 }
5222
5223 /**
5224  * Transform a statement.
5225  */
5226 static void statement_to_firm(statement_t *statement)
5227 {
5228 #ifndef NDEBUG
5229         assert(!statement->base.transformed);
5230         statement->base.transformed = true;
5231 #endif
5232
5233         switch (statement->kind) {
5234         case STATEMENT_INVALID:
5235                 panic("invalid statement found");
5236         case STATEMENT_EMPTY:
5237                 /* nothing */
5238                 return;
5239         case STATEMENT_COMPOUND:
5240                 compound_statement_to_firm(&statement->compound);
5241                 return;
5242         case STATEMENT_RETURN:
5243                 return_statement_to_firm(&statement->returns);
5244                 return;
5245         case STATEMENT_EXPRESSION:
5246                 expression_statement_to_firm(&statement->expression);
5247                 return;
5248         case STATEMENT_IF:
5249                 if_statement_to_firm(&statement->ifs);
5250                 return;
5251         case STATEMENT_WHILE:
5252                 while_statement_to_firm(&statement->whiles);
5253                 return;
5254         case STATEMENT_DO_WHILE:
5255                 do_while_statement_to_firm(&statement->do_while);
5256                 return;
5257         case STATEMENT_DECLARATION:
5258                 declaration_statement_to_firm(&statement->declaration);
5259                 return;
5260         case STATEMENT_BREAK:
5261                 create_jump_statement(statement, get_break_label());
5262                 return;
5263         case STATEMENT_CONTINUE:
5264                 create_jump_statement(statement, continue_label);
5265                 return;
5266         case STATEMENT_SWITCH:
5267                 switch_statement_to_firm(&statement->switchs);
5268                 return;
5269         case STATEMENT_CASE_LABEL:
5270                 case_label_to_firm(&statement->case_label);
5271                 return;
5272         case STATEMENT_FOR:
5273                 for_statement_to_firm(&statement->fors);
5274                 return;
5275         case STATEMENT_LABEL:
5276                 label_to_firm(&statement->label);
5277                 return;
5278         case STATEMENT_GOTO:
5279                 goto_to_firm(&statement->gotos);
5280                 return;
5281         case STATEMENT_ASM:
5282                 asm_statement_to_firm(&statement->asms);
5283                 return;
5284         case STATEMENT_MS_TRY:
5285                 ms_try_statement_to_firm(&statement->ms_try);
5286                 return;
5287         case STATEMENT_LEAVE:
5288                 leave_statement_to_firm(&statement->leave);
5289                 return;
5290         }
5291         panic("statement not implemented");
5292 }
5293
5294 static int count_local_variables(const entity_t *entity,
5295                                  const entity_t *const last)
5296 {
5297         int count = 0;
5298         entity_t const *const end = last != NULL ? last->base.next : NULL;
5299         for (; entity != end; entity = entity->base.next) {
5300                 type_t *type;
5301                 bool    address_taken;
5302
5303                 if (entity->kind == ENTITY_VARIABLE) {
5304                         type          = skip_typeref(entity->declaration.type);
5305                         address_taken = entity->variable.address_taken;
5306                 } else if (entity->kind == ENTITY_PARAMETER) {
5307                         type          = skip_typeref(entity->declaration.type);
5308                         address_taken = entity->parameter.address_taken;
5309                 } else {
5310                         continue;
5311                 }
5312
5313                 if (!address_taken && is_type_scalar(type))
5314                         ++count;
5315         }
5316         return count;
5317 }
5318
5319 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5320 {
5321         int *const count = env;
5322
5323         switch (stmt->kind) {
5324         case STATEMENT_DECLARATION: {
5325                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5326                 *count += count_local_variables(decl_stmt->declarations_begin,
5327                                 decl_stmt->declarations_end);
5328                 break;
5329         }
5330
5331         case STATEMENT_FOR:
5332                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5333                 break;
5334
5335         default:
5336                 break;
5337         }
5338 }
5339
5340 static int get_function_n_local_vars(entity_t *entity)
5341 {
5342         int count = 0;
5343
5344         /* count parameters */
5345         count += count_local_variables(entity->function.parameters.entities, NULL);
5346
5347         /* count local variables declared in body */
5348         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5349                         &count);
5350         return count;
5351 }
5352
5353 static void initialize_function_parameters(entity_t *entity)
5354 {
5355         assert(entity->kind == ENTITY_FUNCTION);
5356         ir_graph *irg             = current_ir_graph;
5357         ir_node  *args            = get_irg_args(irg);
5358         ir_node  *start_block     = get_irg_start_block(irg);
5359         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5360
5361         int       n         = 0;
5362         entity_t *parameter = entity->function.parameters.entities;
5363         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5364                 if (parameter->kind != ENTITY_PARAMETER)
5365                         continue;
5366
5367                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5368                 type_t *type = skip_typeref(parameter->declaration.type);
5369
5370                 bool needs_entity = parameter->parameter.address_taken;
5371                 assert(!is_type_array(type));
5372                 if (is_type_compound(type)) {
5373                         needs_entity = true;
5374                 }
5375
5376                 if (needs_entity) {
5377                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5378                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5379                         set_entity_ident(entity, id);
5380
5381                         parameter->declaration.kind
5382                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5383                         parameter->parameter.v.entity = entity;
5384                         continue;
5385                 }
5386
5387                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5388                 ir_mode *param_mode   = get_type_mode(param_irtype);
5389
5390                 long     pn    = n;
5391                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5392
5393                 ir_mode *mode = get_ir_mode_storage(type);
5394                 value = create_conv(NULL, value, mode);
5395                 value = do_strict_conv(NULL, value);
5396
5397                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5398                 parameter->parameter.v.value_number = next_value_number_function;
5399                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5400                                         parameter);
5401                 ++next_value_number_function;
5402
5403                 set_value(parameter->parameter.v.value_number, value);
5404         }
5405 }
5406
5407 /**
5408  * Handle additional decl modifiers for IR-graphs
5409  *
5410  * @param irg            the IR-graph
5411  * @param dec_modifiers  additional modifiers
5412  */
5413 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5414 {
5415         if (decl_modifiers & DM_RETURNS_TWICE) {
5416                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5417                 set_irg_additional_property(irg, mtp_property_returns_twice);
5418         }
5419         if (decl_modifiers & DM_NORETURN) {
5420                 /* TRUE if the declaration includes the Microsoft
5421                    __declspec(noreturn) specifier. */
5422                 set_irg_additional_property(irg, mtp_property_noreturn);
5423         }
5424         if (decl_modifiers & DM_NOTHROW) {
5425                 /* TRUE if the declaration includes the Microsoft
5426                    __declspec(nothrow) specifier. */
5427                 set_irg_additional_property(irg, mtp_property_nothrow);
5428         }
5429         if (decl_modifiers & DM_NAKED) {
5430                 /* TRUE if the declaration includes the Microsoft
5431                    __declspec(naked) specifier. */
5432                 set_irg_additional_property(irg, mtp_property_naked);
5433         }
5434         if (decl_modifiers & DM_FORCEINLINE) {
5435                 /* TRUE if the declaration includes the
5436                    Microsoft __forceinline specifier. */
5437                 set_irg_inline_property(irg, irg_inline_forced);
5438         }
5439         if (decl_modifiers & DM_NOINLINE) {
5440                 /* TRUE if the declaration includes the Microsoft
5441                    __declspec(noinline) specifier. */
5442                 set_irg_inline_property(irg, irg_inline_forbidden);
5443         }
5444 }
5445
5446 static void add_function_pointer(ir_type *segment, ir_entity *method,
5447                                  const char *unique_template)
5448 {
5449         ir_type   *method_type  = get_entity_type(method);
5450         ident     *id           = id_unique(unique_template);
5451         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5452
5453         ident     *ide          = id_unique(unique_template);
5454         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5455         ir_graph  *irg          = get_const_code_irg();
5456         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5457                                                            method, NULL);
5458
5459         set_entity_compiler_generated(ptr, 1);
5460         set_entity_variability(ptr, variability_constant);
5461         set_atomic_ent_value(ptr, val);
5462 }
5463
5464 /**
5465  * Generate possible IJmp branches to a given label block.
5466  */
5467 static void gen_ijmp_branches(ir_node *block)
5468 {
5469         ir_node *ijmp;
5470         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5471                 add_immBlock_pred(block, ijmp);
5472         }
5473 }
5474
5475 /**
5476  * Create code for a function.
5477  */
5478 static void create_function(entity_t *entity)
5479 {
5480         assert(entity->kind == ENTITY_FUNCTION);
5481         ir_entity *function_entity = get_function_entity(entity);
5482
5483         if (entity->function.statement == NULL)
5484                 return;
5485
5486         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5487                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5488                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5489         }
5490         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5491                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5492                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5493         }
5494
5495         current_function_entity = entity;
5496         current_function_name   = NULL;
5497         current_funcsig         = NULL;
5498
5499         assert(all_labels == NULL);
5500         all_labels = NEW_ARR_F(label_t *, 0);
5501         ijmp_list  = NULL;
5502
5503         int       n_local_vars = get_function_n_local_vars(entity);
5504         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5505
5506         ir_graph *old_current_function = current_function;
5507         current_function = irg;
5508
5509         set_irg_fp_model(irg, firm_opt.fp_model);
5510         tarval_enable_fp_ops(1);
5511         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5512
5513         ir_node *first_block = get_cur_block();
5514
5515         /* set inline flags */
5516         if (entity->function.is_inline)
5517                 set_irg_inline_property(irg, irg_inline_recomended);
5518         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5519
5520         next_value_number_function = 0;
5521         initialize_function_parameters(entity);
5522
5523         statement_to_firm(entity->function.statement);
5524
5525         ir_node *end_block = get_irg_end_block(irg);
5526
5527         /* do we have a return statement yet? */
5528         if (get_cur_block() != NULL) {
5529                 type_t *type = skip_typeref(entity->declaration.type);
5530                 assert(is_type_function(type));
5531                 const function_type_t *func_type   = &type->function;
5532                 const type_t          *return_type
5533                         = skip_typeref(func_type->return_type);
5534
5535                 ir_node *ret;
5536                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5537                         ret = new_Return(get_store(), 0, NULL);
5538                 } else {
5539                         ir_mode *mode;
5540                         if (is_type_scalar(return_type)) {
5541                                 mode = get_ir_mode_storage(func_type->return_type);
5542                         } else {
5543                                 mode = mode_P_data;
5544                         }
5545
5546                         ir_node *in[1];
5547                         /* §5.1.2.2.3 main implicitly returns 0 */
5548                         if (is_main(entity)) {
5549                                 in[0] = new_Const(get_mode_null(mode));
5550                         } else {
5551                                 in[0] = new_Unknown(mode);
5552                         }
5553                         ret = new_Return(get_store(), 1, in);
5554                 }
5555                 add_immBlock_pred(end_block, ret);
5556         }
5557
5558         bool has_computed_gotos = false;
5559         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5560                 label_t *label = all_labels[i];
5561                 if (label->address_taken) {
5562                         gen_ijmp_branches(label->block);
5563                         has_computed_gotos = true;
5564                 }
5565                 mature_immBlock(label->block);
5566         }
5567         if (has_computed_gotos) {
5568                 /* if we have computed goto's in the function, we cannot inline it */
5569                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5570                         warningf(&entity->base.source_position,
5571                                  "function '%Y' can never be inlined because it contains a computed goto",
5572                                  entity->base.symbol);
5573                 }
5574                 set_irg_inline_property(irg, irg_inline_forbidden);
5575         }
5576
5577         DEL_ARR_F(all_labels);
5578         all_labels = NULL;
5579
5580         mature_immBlock(first_block);
5581         mature_immBlock(end_block);
5582
5583         irg_finalize_cons(irg);
5584
5585         /* finalize the frame type */
5586         ir_type *frame_type = get_irg_frame_type(irg);
5587         int      n          = get_compound_n_members(frame_type);
5588         int      align_all  = 4;
5589         int      offset     = 0;
5590         for (int i = 0; i < n; ++i) {
5591                 ir_entity *entity      = get_compound_member(frame_type, i);
5592                 ir_type   *entity_type = get_entity_type(entity);
5593
5594                 int align = get_type_alignment_bytes(entity_type);
5595                 if (align > align_all)
5596                         align_all = align;
5597                 int misalign = 0;
5598                 if (align > 0) {
5599                         misalign  = offset % align;
5600                         if (misalign > 0) {
5601                                 offset += align - misalign;
5602                         }
5603                 }
5604
5605                 set_entity_offset(entity, offset);
5606                 offset += get_type_size_bytes(entity_type);
5607         }
5608         set_type_size_bytes(frame_type, offset);
5609         set_type_alignment_bytes(frame_type, align_all);
5610
5611         irg_vrfy(irg);
5612         current_function = old_current_function;
5613
5614         /* create inner functions */
5615         entity_t *inner;
5616         for (inner = next_inner_function(); inner != NULL;
5617              inner = next_inner_function()) {
5618                 create_function(inner);
5619         }
5620 }
5621
5622 static void scope_to_firm(scope_t *scope)
5623 {
5624         /* first pass: create declarations */
5625         entity_t *entity = scope->entities;
5626         for ( ; entity != NULL; entity = entity->base.next) {
5627                 if (entity->base.symbol == NULL)
5628                         continue;
5629
5630                 if (entity->kind == ENTITY_FUNCTION) {
5631                         get_function_entity(entity);
5632                 } else if (entity->kind == ENTITY_VARIABLE) {
5633                         create_global_variable(entity);
5634                 }
5635         }
5636
5637         /* second pass: create code/initializers */
5638         entity = scope->entities;
5639         for ( ; entity != NULL; entity = entity->base.next) {
5640                 if (entity->base.symbol == NULL)
5641                         continue;
5642
5643                 if (entity->kind == ENTITY_FUNCTION) {
5644                         create_function(entity);
5645                 } else if (entity->kind == ENTITY_VARIABLE) {
5646                         assert(entity->declaration.kind
5647                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5648                         current_ir_graph = get_const_code_irg();
5649                         create_variable_initializer(entity);
5650                 }
5651         }
5652 }
5653
5654 void init_ast2firm(void)
5655 {
5656         obstack_init(&asm_obst);
5657         init_atomic_modes();
5658
5659         /* OS option must be set to the backend */
5660         switch (firm_opt.os_support) {
5661         case OS_SUPPORT_MINGW:
5662                 create_ld_ident = create_name_win32;
5663                 break;
5664         case OS_SUPPORT_LINUX:
5665                 create_ld_ident = create_name_linux_elf;
5666                 break;
5667         case OS_SUPPORT_MACHO:
5668                 create_ld_ident = create_name_macho;
5669                 break;
5670         default:
5671                 panic("unexpected OS support mode");
5672         }
5673
5674         /* create idents for all known runtime functions */
5675         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5676                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5677         }
5678
5679         entitymap_init(&entitymap);
5680 }
5681
5682 static void init_ir_types(void)
5683 {
5684         static int ir_types_initialized = 0;
5685         if (ir_types_initialized)
5686                 return;
5687         ir_types_initialized = 1;
5688
5689         ir_type_int        = get_ir_type(type_int);
5690         ir_type_const_char = get_ir_type(type_const_char);
5691         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5692         ir_type_void       = get_ir_type(type_void);
5693
5694         const backend_params *be_params = be_get_backend_param();
5695         mode_float_arithmetic = be_params->mode_float_arithmetic;
5696 }
5697
5698 void exit_ast2firm(void)
5699 {
5700         entitymap_destroy(&entitymap);
5701         obstack_free(&asm_obst, NULL);
5702 }
5703
5704 static void global_asm_to_firm(statement_t *s)
5705 {
5706         for (; s != NULL; s = s->base.next) {
5707                 assert(s->kind == STATEMENT_ASM);
5708
5709                 char const *const text = s->asms.asm_text.begin;
5710                 size_t            size = s->asms.asm_text.size;
5711
5712                 /* skip the last \0 */
5713                 if (text[size - 1] == '\0')
5714                         --size;
5715
5716                 ident *const id = new_id_from_chars(text, size);
5717                 add_irp_asm(id);
5718         }
5719 }
5720
5721 void translation_unit_to_firm(translation_unit_t *unit)
5722 {
5723         /* just to be sure */
5724         continue_label           = NULL;
5725         break_label              = NULL;
5726         current_switch_cond      = NULL;
5727         current_translation_unit = unit;
5728
5729         init_ir_types();
5730         inner_functions = NEW_ARR_F(entity_t *, 0);
5731
5732         scope_to_firm(&unit->scope);
5733         global_asm_to_firm(unit->global_asm);
5734
5735         DEL_ARR_F(inner_functions);
5736         inner_functions  = NULL;
5737
5738         current_ir_graph         = NULL;
5739         current_translation_unit = NULL;
5740 }