nsz Git - cparser/blob - ast2firm.c

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