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
2249                         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2250                         node = create_conv(dbgi, node, mode_arith);
2251                         return node;
2252                 } else {
2253                         /* make sure firm type is constructed */
2254                         (void) get_ir_type(type);
2255                         return value_node;
2256                 }
2257         }
2258         case EXPR_UNARY_CAST_IMPLICIT: {
2259                 ir_node *value_node = expression_to_firm(value);
2260                 if (is_type_scalar(type)) {
2261                         ir_mode *mode = get_ir_mode_arithmetic(type);
2262                         return create_conv(dbgi, value_node, mode);
2263                 } else {
2264                         return value_node;
2265                 }
2266         }
2267         case EXPR_UNARY_ASSUME:
2268                 if (firm_opt.confirm)
2269                         return handle_assume(dbgi, value);
2270                 else
2271                         return NULL;
2272
2273         default:
2274                 break;
2275         }
2276         panic("invalid UNEXPR type found");
2277 }
2278
2279 /**
2280  * produces a 0/1 depending of the value of a mode_b node
2281  */
2282 static ir_node *produce_condition_result(const expression_t *expression,
2283                                          ir_mode *mode, dbg_info *dbgi)
2284 {
2285         ir_node *cur_block = get_cur_block();
2286
2287         ir_node *one_block = new_immBlock();
2288         set_cur_block(one_block);
2289         ir_node *one       = new_Const(get_mode_one(mode));
2290         ir_node *jmp_one   = new_d_Jmp(dbgi);
2291
2292         ir_node *zero_block = new_immBlock();
2293         set_cur_block(zero_block);
2294         ir_node *zero       = new_Const(get_mode_null(mode));
2295         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2296
2297         set_cur_block(cur_block);
2298         create_condition_evaluation(expression, one_block, zero_block);
2299         mature_immBlock(one_block);
2300         mature_immBlock(zero_block);
2301
2302         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2303         new_Block(2, in_cf);
2304
2305         ir_node *in[2] = { one, zero };
2306         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2307
2308         return val;
2309 }
2310
2311 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2312                 ir_node *value, type_t *type)
2313 {
2314         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2315         assert(is_type_pointer(type));
2316         pointer_type_t *const pointer_type = &type->pointer;
2317         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2318         unsigned              elem_size    = get_type_size_const(points_to);
2319
2320         value = create_conv(dbgi, value, mode);
2321
2322         /* gcc extension: allow arithmetic with void * and function * */
2323         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2324             is_type_function(points_to))  {
2325                 elem_size = 1;
2326         }
2327
2328         assert(elem_size >= 1);
2329         if (elem_size == 1)
2330                 return value;
2331
2332         ir_node *const cnst = new_Const_long(mode, (long)elem_size);
2333         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode);
2334         return mul;
2335 }
2336
2337 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2338                           ir_node *left, ir_node *right)
2339 {
2340         ir_mode  *mode;
2341         type_t   *type_left  = skip_typeref(expression->left->base.type);
2342         type_t   *type_right = skip_typeref(expression->right->base.type);
2343
2344         expression_kind_t kind = expression->base.kind;
2345
2346         switch (kind) {
2347         case EXPR_BINARY_SHIFTLEFT:
2348         case EXPR_BINARY_SHIFTRIGHT:
2349         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2350         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2351                 mode  = get_irn_mode(left);
2352                 right = create_conv(dbgi, right, mode_uint);
2353                 break;
2354
2355         case EXPR_BINARY_SUB:
2356                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2357                         const pointer_type_t *const ptr_type = &type_left->pointer;
2358
2359                         mode = get_ir_mode_arithmetic(expression->base.type);
2360                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2361                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2362                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2363                         ir_node *const no_mem    = new_NoMem();
2364                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2365                                                                                                    mode, op_pin_state_floats);
2366                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2367                 }
2368                 /* fallthrough */
2369         case EXPR_BINARY_SUB_ASSIGN:
2370                 if (is_type_pointer(type_left)) {
2371                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2372                         mode  = get_ir_mode_arithmetic(type_left);
2373                         break;
2374                 }
2375                 goto normal_node;
2376
2377         case EXPR_BINARY_ADD:
2378         case EXPR_BINARY_ADD_ASSIGN:
2379                 if (is_type_pointer(type_left)) {
2380                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2381                         mode  = get_ir_mode_arithmetic(type_left);
2382                         break;
2383                 } else if (is_type_pointer(type_right)) {
2384                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2385                         mode  = get_ir_mode_arithmetic(type_right);
2386                         break;
2387                 }
2388                 goto normal_node;
2389
2390         default:
2391 normal_node:
2392                 mode = get_ir_mode_arithmetic(type_right);
2393                 left = create_conv(dbgi, left, mode);
2394                 break;
2395         }
2396
2397         switch (kind) {
2398         case EXPR_BINARY_ADD_ASSIGN:
2399         case EXPR_BINARY_ADD:
2400                 return new_d_Add(dbgi, left, right, mode);
2401         case EXPR_BINARY_SUB_ASSIGN:
2402         case EXPR_BINARY_SUB:
2403                 return new_d_Sub(dbgi, left, right, mode);
2404         case EXPR_BINARY_MUL_ASSIGN:
2405         case EXPR_BINARY_MUL:
2406                 return new_d_Mul(dbgi, left, right, mode);
2407         case EXPR_BINARY_BITWISE_AND:
2408         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2409                 return new_d_And(dbgi, left, right, mode);
2410         case EXPR_BINARY_BITWISE_OR:
2411         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2412                 return new_d_Or(dbgi, left, right, mode);
2413         case EXPR_BINARY_BITWISE_XOR:
2414         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2415                 return new_d_Eor(dbgi, left, right, mode);
2416         case EXPR_BINARY_SHIFTLEFT:
2417         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2418                 return new_d_Shl(dbgi, left, right, mode);
2419         case EXPR_BINARY_SHIFTRIGHT:
2420         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2421                 if (mode_is_signed(mode)) {
2422                         return new_d_Shrs(dbgi, left, right, mode);
2423                 } else {
2424                         return new_d_Shr(dbgi, left, right, mode);
2425                 }
2426         case EXPR_BINARY_DIV:
2427         case EXPR_BINARY_DIV_ASSIGN: {
2428                 ir_node *pin = new_Pin(new_NoMem());
2429                 ir_node *op;
2430                 ir_node *res;
2431                 if (mode_is_float(mode)) {
2432                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2433                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2434                 } else {
2435                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2436                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2437                 }
2438                 return res;
2439         }
2440         case EXPR_BINARY_MOD:
2441         case EXPR_BINARY_MOD_ASSIGN: {
2442                 ir_node *pin = new_Pin(new_NoMem());
2443                 assert(!mode_is_float(mode));
2444                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2445                                          op_pin_state_floats);
2446                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2447                 return res;
2448         }
2449         default:
2450                 panic("unexpected expression kind");
2451         }
2452 }
2453
2454 static ir_node *create_lazy_op(const binary_expression_t *expression)
2455 {
2456         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2457         type_t   *type = skip_typeref(expression->base.type);
2458         ir_mode  *mode = get_ir_mode_arithmetic(type);
2459
2460         if (is_constant_expression(expression->left)) {
2461                 long val = fold_constant(expression->left);
2462                 expression_kind_t ekind = expression->base.kind;
2463                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2464                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2465                         if (val == 0) {
2466                                 return new_Const(get_mode_null(mode));
2467                         }
2468                 } else {
2469                         if (val != 0) {
2470                                 return new_Const(get_mode_one(mode));
2471                         }
2472                 }
2473
2474                 if (is_constant_expression(expression->right)) {
2475                         long const valr = fold_constant(expression->left);
2476                         return valr != 0 ?
2477                                 new_Const(get_mode_one(mode)) :
2478                                 new_Const(get_mode_null(mode));
2479                 }
2480
2481                 return produce_condition_result(expression->right, mode, dbgi);
2482         }
2483
2484         return produce_condition_result((const expression_t*) expression, mode,
2485                                         dbgi);
2486 }
2487
2488 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2489                                             ir_node *right, ir_mode *mode);
2490
2491 static ir_node *create_assign_binop(const binary_expression_t *expression)
2492 {
2493         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2494         const expression_t *left_expr = expression->left;
2495         type_t             *type      = left_expr->base.type;
2496         ir_mode            *left_mode = get_ir_mode_storage(type);
2497         ir_node            *right     = expression_to_firm(expression->right);
2498         ir_node            *left_addr = expression_to_addr(left_expr);
2499         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2500         ir_node            *result    = create_op(dbgi, expression, left, right);
2501
2502         result = create_conv(dbgi, result, left_mode);
2503         result = do_strict_conv(dbgi, result);
2504
2505         result = set_value_for_expression_addr(left_expr, result, left_addr);
2506
2507         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2508         return create_conv(dbgi, result, mode_arithmetic);
2509 }
2510
2511 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2512 {
2513         expression_kind_t kind = expression->base.kind;
2514
2515         switch(kind) {
2516         case EXPR_BINARY_EQUAL:
2517         case EXPR_BINARY_NOTEQUAL:
2518         case EXPR_BINARY_LESS:
2519         case EXPR_BINARY_LESSEQUAL:
2520         case EXPR_BINARY_GREATER:
2521         case EXPR_BINARY_GREATEREQUAL:
2522         case EXPR_BINARY_ISGREATER:
2523         case EXPR_BINARY_ISGREATEREQUAL:
2524         case EXPR_BINARY_ISLESS:
2525         case EXPR_BINARY_ISLESSEQUAL:
2526         case EXPR_BINARY_ISLESSGREATER:
2527         case EXPR_BINARY_ISUNORDERED: {
2528                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2529                 ir_node *left  = expression_to_firm(expression->left);
2530                 ir_node *right = expression_to_firm(expression->right);
2531                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2532                 long     pnc   = get_pnc(kind, expression->left->base.type);
2533                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2534                 return proj;
2535         }
2536         case EXPR_BINARY_ASSIGN: {
2537                 ir_node *addr  = expression_to_addr(expression->left);
2538                 ir_node *right = expression_to_firm(expression->right);
2539                 ir_node *res
2540                         = set_value_for_expression_addr(expression->left, right, addr);
2541
2542                 type_t  *type            = skip_typeref(expression->base.type);
2543                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2544                 return create_conv(NULL, res, mode_arithmetic);
2545         }
2546         case EXPR_BINARY_ADD:
2547         case EXPR_BINARY_SUB:
2548         case EXPR_BINARY_MUL:
2549         case EXPR_BINARY_DIV:
2550         case EXPR_BINARY_MOD:
2551         case EXPR_BINARY_BITWISE_AND:
2552         case EXPR_BINARY_BITWISE_OR:
2553         case EXPR_BINARY_BITWISE_XOR:
2554         case EXPR_BINARY_SHIFTLEFT:
2555         case EXPR_BINARY_SHIFTRIGHT:
2556         {
2557                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2558                 ir_node  *left  = expression_to_firm(expression->left);
2559                 ir_node  *right = expression_to_firm(expression->right);
2560                 return create_op(dbgi, expression, left, right);
2561         }
2562         case EXPR_BINARY_LOGICAL_AND:
2563         case EXPR_BINARY_LOGICAL_OR:
2564                 return create_lazy_op(expression);
2565         case EXPR_BINARY_COMMA:
2566                 /* create side effects of left side */
2567                 (void) expression_to_firm(expression->left);
2568                 return _expression_to_firm(expression->right);
2569
2570         case EXPR_BINARY_ADD_ASSIGN:
2571         case EXPR_BINARY_SUB_ASSIGN:
2572         case EXPR_BINARY_MUL_ASSIGN:
2573         case EXPR_BINARY_MOD_ASSIGN:
2574         case EXPR_BINARY_DIV_ASSIGN:
2575         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2576         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2577         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2578         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2579         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2580                 return create_assign_binop(expression);
2581         default:
2582                 panic("TODO binexpr type");
2583         }
2584 }
2585
2586 static ir_node *array_access_addr(const array_access_expression_t *expression)
2587 {
2588         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2589         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2590         ir_node  *offset      = expression_to_firm(expression->index);
2591         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2592         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2593         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2594
2595         return result;
2596 }
2597
2598 static ir_node *array_access_to_firm(
2599                 const array_access_expression_t *expression)
2600 {
2601         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2602         ir_node  *addr   = array_access_addr(expression);
2603         type_t   *type   = revert_automatic_type_conversion(
2604                         (const expression_t*) expression);
2605         type             = skip_typeref(type);
2606
2607         return deref_address(dbgi, type, addr);
2608 }
2609
2610 static long get_offsetof_offset(const offsetof_expression_t *expression)
2611 {
2612         type_t *orig_type = expression->type;
2613         long    offset    = 0;
2614
2615         designator_t *designator = expression->designator;
2616         for ( ; designator != NULL; designator = designator->next) {
2617                 type_t *type = skip_typeref(orig_type);
2618                 /* be sure the type is constructed */
2619                 (void) get_ir_type(type);
2620
2621                 if (designator->symbol != NULL) {
2622                         assert(is_type_compound(type));
2623                         symbol_t *symbol = designator->symbol;
2624
2625                         compound_t *compound = type->compound.compound;
2626                         entity_t   *iter     = compound->members.entities;
2627                         for ( ; iter != NULL; iter = iter->base.next) {
2628                                 if (iter->base.symbol == symbol) {
2629                                         break;
2630                                 }
2631                         }
2632                         assert(iter != NULL);
2633
2634                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2635                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2636                         offset += get_entity_offset(iter->compound_member.entity);
2637
2638                         orig_type = iter->declaration.type;
2639                 } else {
2640                         expression_t *array_index = designator->array_index;
2641                         assert(designator->array_index != NULL);
2642                         assert(is_type_array(type));
2643
2644                         long index         = fold_constant(array_index);
2645                         ir_type *arr_type  = get_ir_type(type);
2646                         ir_type *elem_type = get_array_element_type(arr_type);
2647                         long     elem_size = get_type_size_bytes(elem_type);
2648
2649                         offset += index * elem_size;
2650
2651                         orig_type = type->array.element_type;
2652                 }
2653         }
2654
2655         return offset;
2656 }
2657
2658 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2659 {
2660         ir_mode  *mode   = get_ir_mode_arithmetic(expression->base.type);
2661         long      offset = get_offsetof_offset(expression);
2662         tarval   *tv     = new_tarval_from_long(offset, mode);
2663         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2664
2665         return new_d_Const(dbgi, tv);
2666 }
2667
2668 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2669                                      ir_entity *entity, type_t *type);
2670
2671 static ir_node *compound_literal_to_firm(
2672                 const compound_literal_expression_t *expression)
2673 {
2674         type_t *type = expression->type;
2675
2676         /* create an entity on the stack */
2677         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2678
2679         ident     *const id     = id_unique("CompLit.%u");
2680         ir_type   *const irtype = get_ir_type(type);
2681         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2682         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2683         set_entity_ld_ident(entity, id);
2684
2685         set_entity_variability(entity, variability_uninitialized);
2686
2687         /* create initialisation code */
2688         initializer_t *initializer = expression->initializer;
2689         create_local_initializer(initializer, dbgi, entity, type);
2690
2691         /* create a sel for the compound literal address */
2692         ir_node *frame = get_local_frame(entity);
2693         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2694         return sel;
2695 }
2696
2697 /**
2698  * Transform a sizeof expression into Firm code.
2699  */
2700 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2701 {
2702         type_t *type = expression->type;
2703         if (type == NULL) {
2704                 type = expression->tp_expression->base.type;
2705                 assert(type != NULL);
2706         }
2707
2708         type = skip_typeref(type);
2709         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2710         if (is_type_array(type) && type->array.is_vla
2711                         && expression->tp_expression != NULL) {
2712                 expression_to_firm(expression->tp_expression);
2713         }
2714
2715         return get_type_size(type);
2716 }
2717
2718 /**
2719  * Transform an alignof expression into Firm code.
2720  */
2721 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2722 {
2723         type_t *type = expression->type;
2724         if (type == NULL) {
2725                 /* beware: if expression is a variable reference, return the
2726                    alignment of the variable. */
2727                 const expression_t *tp_expression = expression->tp_expression;
2728                 const entity_t     *entity        = expression_is_variable(tp_expression);
2729                 if (entity != NULL) {
2730                         /* TODO: get the alignment of this variable. */
2731                         (void) entity;
2732                 }
2733                 type = tp_expression->base.type;
2734                 assert(type != NULL);
2735         }
2736
2737         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2738         symconst_symbol sym;
2739         sym.type_p = get_ir_type(type);
2740         return new_SymConst(mode, sym, symconst_type_align);
2741 }
2742
2743 static void init_ir_types(void);
2744
2745 long fold_constant(const expression_t *expression)
2746 {
2747         assert(is_type_valid(skip_typeref(expression->base.type)));
2748
2749         bool constant_folding_old = constant_folding;
2750         constant_folding = true;
2751
2752         init_ir_types();
2753
2754         assert(is_constant_expression(expression));
2755
2756         ir_graph *old_current_ir_graph = current_ir_graph;
2757         if (current_ir_graph == NULL) {
2758                 current_ir_graph = get_const_code_irg();
2759         }
2760
2761         ir_node *cnst = expression_to_firm(expression);
2762         current_ir_graph = old_current_ir_graph;
2763
2764         if (!is_Const(cnst)) {
2765                 panic("couldn't fold constant");
2766         }
2767
2768         tarval *tv = get_Const_tarval(cnst);
2769         if (!tarval_is_long(tv)) {
2770                 panic("result of constant folding is not integer");
2771         }
2772
2773         constant_folding = constant_folding_old;
2774
2775         return get_tarval_long(tv);
2776 }
2777
2778 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2779 {
2780         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2781
2782         /* first try to fold a constant condition */
2783         if (is_constant_expression(expression->condition)) {
2784                 long val = fold_constant(expression->condition);
2785                 if (val) {
2786                         expression_t *true_expression = expression->true_expression;
2787                         if (true_expression == NULL)
2788                                 true_expression = expression->condition;
2789                         return expression_to_firm(true_expression);
2790                 } else {
2791                         return expression_to_firm(expression->false_expression);
2792                 }
2793         }
2794
2795         ir_node *cur_block   = get_cur_block();
2796
2797         /* create the true block */
2798         ir_node *true_block  = new_immBlock();
2799         set_cur_block(true_block);
2800
2801         ir_node *true_val = expression->true_expression != NULL ?
2802                 expression_to_firm(expression->true_expression) : NULL;
2803         ir_node *true_jmp = new_Jmp();
2804
2805         /* create the false block */
2806         ir_node *false_block = new_immBlock();
2807         set_cur_block(false_block);
2808
2809         ir_node *false_val = expression_to_firm(expression->false_expression);
2810         ir_node *false_jmp = new_Jmp();
2811
2812         /* create the condition evaluation */
2813         set_cur_block(cur_block);
2814         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2815         if (expression->true_expression == NULL) {
2816                 if (cond_expr != NULL) {
2817                         true_val = cond_expr;
2818                 } else {
2819                         /* Condition ended with a short circuit (&&, ||, !) operation.
2820                          * Generate a "1" as value for the true branch. */
2821                         true_val = new_Const(get_mode_one(mode_Is));
2822                 }
2823         }
2824         mature_immBlock(true_block);
2825         mature_immBlock(false_block);
2826
2827         /* create the common block */
2828         ir_node *in_cf[2] = { true_jmp, false_jmp };
2829         new_Block(2, in_cf);
2830
2831         /* TODO improve static semantics, so either both or no values are NULL */
2832         if (true_val == NULL || false_val == NULL)
2833                 return NULL;
2834
2835         ir_node *in[2] = { true_val, false_val };
2836         ir_mode *mode  = get_irn_mode(true_val);
2837         assert(get_irn_mode(false_val) == mode);
2838         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2839
2840         return val;
2841 }
2842
2843 /**
2844  * Returns an IR-node representing the address of a field.
2845  */
2846 static ir_node *select_addr(const select_expression_t *expression)
2847 {
2848         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2849
2850         construct_select_compound(expression);
2851
2852         ir_node *compound_addr = expression_to_firm(expression->compound);
2853
2854         entity_t *entry = expression->compound_entry;
2855         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2856         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2857
2858         if (constant_folding) {
2859                 ir_mode *mode = get_irn_mode(compound_addr);
2860                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2861                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
2862                 return new_d_Add(dbgi, compound_addr, ofs, mode);
2863         } else {
2864                 ir_entity *irentity = entry->compound_member.entity;
2865                 assert(irentity != NULL);
2866                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2867         }
2868 }
2869
2870 static ir_node *select_to_firm(const select_expression_t *expression)
2871 {
2872         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2873         ir_node  *addr = select_addr(expression);
2874         type_t   *type = revert_automatic_type_conversion(
2875                         (const expression_t*) expression);
2876         type           = skip_typeref(type);
2877
2878         entity_t *entry      = expression->compound_entry;
2879         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2880         type_t   *entry_type = skip_typeref(entry->declaration.type);
2881
2882         if (entry_type->kind == TYPE_BITFIELD) {
2883                 return bitfield_extract_to_firm(expression, addr);
2884         }
2885
2886         return deref_address(dbgi, type, addr);
2887 }
2888
2889 /* Values returned by __builtin_classify_type. */
2890 typedef enum gcc_type_class
2891 {
2892         no_type_class = -1,
2893         void_type_class,
2894         integer_type_class,
2895         char_type_class,
2896         enumeral_type_class,
2897         boolean_type_class,
2898         pointer_type_class,
2899         reference_type_class,
2900         offset_type_class,
2901         real_type_class,
2902         complex_type_class,
2903         function_type_class,
2904         method_type_class,
2905         record_type_class,
2906         union_type_class,
2907         array_type_class,
2908         string_type_class,
2909         set_type_class,
2910         file_type_class,
2911         lang_type_class
2912 } gcc_type_class;
2913
2914 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2915 {
2916         type_t *type = expr->type_expression->base.type;
2917
2918         /* FIXME gcc returns different values depending on whether compiling C or C++
2919          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2920         gcc_type_class tc;
2921         for (;;) {
2922                 type = skip_typeref(type);
2923                 switch (type->kind) {
2924                         case TYPE_ATOMIC: {
2925                                 const atomic_type_t *const atomic_type = &type->atomic;
2926                                 switch (atomic_type->akind) {
2927                                         /* should not be reached */
2928                                         case ATOMIC_TYPE_INVALID:
2929                                                 tc = no_type_class;
2930                                                 goto make_const;
2931
2932                                         /* gcc cannot do that */
2933                                         case ATOMIC_TYPE_VOID:
2934                                                 tc = void_type_class;
2935                                                 goto make_const;
2936
2937                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
2938                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2939                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2940                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2941                                         case ATOMIC_TYPE_SHORT:
2942                                         case ATOMIC_TYPE_USHORT:
2943                                         case ATOMIC_TYPE_INT:
2944                                         case ATOMIC_TYPE_UINT:
2945                                         case ATOMIC_TYPE_LONG:
2946                                         case ATOMIC_TYPE_ULONG:
2947                                         case ATOMIC_TYPE_LONGLONG:
2948                                         case ATOMIC_TYPE_ULONGLONG:
2949                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2950                                                 tc = integer_type_class;
2951                                                 goto make_const;
2952
2953                                         case ATOMIC_TYPE_FLOAT:
2954                                         case ATOMIC_TYPE_DOUBLE:
2955                                         case ATOMIC_TYPE_LONG_DOUBLE:
2956                                                 tc = real_type_class;
2957                                                 goto make_const;
2958                                 }
2959                                 panic("Unexpected atomic type in classify_type_to_firm().");
2960                         }
2961
2962                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2963                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2964                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2965                         case TYPE_ARRAY:           /* gcc handles this as pointer */
2966                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
2967                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2968                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2969                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2970
2971                         /* gcc handles this as integer */
2972                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2973
2974                         /* gcc classifies the referenced type */
2975                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
2976
2977                         case TYPE_BUILTIN:
2978                         /* typedef/typeof should be skipped already */
2979                         case TYPE_TYPEDEF:
2980                         case TYPE_TYPEOF:
2981                         case TYPE_INVALID:
2982                         case TYPE_ERROR:
2983                                 break;
2984                 }
2985                 panic("unexpected TYPE classify_type_to_firm().");
2986         }
2987
2988 make_const:;
2989         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2990         tarval   *const tv   = new_tarval_from_long(tc, mode_int);
2991         return new_d_Const(dbgi, tv);
2992 }
2993
2994 static ir_node *function_name_to_firm(
2995                 const funcname_expression_t *const expr)
2996 {
2997         switch(expr->kind) {
2998         case FUNCNAME_FUNCTION:
2999         case FUNCNAME_PRETTY_FUNCTION:
3000         case FUNCNAME_FUNCDNAME:
3001                 if (current_function_name == NULL) {
3002                         const source_position_t *const src_pos = &expr->base.source_position;
3003                         const char    *name  = current_function_entity->base.symbol->string;
3004                         const string_t string = { name, strlen(name) + 1 };
3005                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3006                 }
3007                 return current_function_name;
3008         case FUNCNAME_FUNCSIG:
3009                 if (current_funcsig == NULL) {
3010                         const source_position_t *const src_pos = &expr->base.source_position;
3011                         ir_entity *ent = get_irg_entity(current_ir_graph);
3012                         const char *const name = get_entity_ld_name(ent);
3013                         const string_t string = { name, strlen(name) + 1 };
3014                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3015                 }
3016                 return current_funcsig;
3017         }
3018         panic("Unsupported function name");
3019 }
3020
3021 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3022 {
3023         statement_t *statement = expr->statement;
3024
3025         assert(statement->kind == STATEMENT_COMPOUND);
3026         return compound_statement_to_firm(&statement->compound);
3027 }
3028
3029 static ir_node *va_start_expression_to_firm(
3030         const va_start_expression_t *const expr)
3031 {
3032         type_t    *const type        = current_function_entity->declaration.type;
3033         ir_type   *const method_type = get_ir_type(type);
3034         int        const n           = get_method_n_params(method_type) - 1;
3035         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3036         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
3037         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3038         ir_node   *const no_mem      = new_NoMem();
3039         ir_node   *const arg_sel     =
3040                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3041
3042         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
3043         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3044         set_value_for_expression(expr->ap, add);
3045
3046         return NULL;
3047 }
3048
3049 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3050 {
3051         type_t       *const type    = expr->base.type;
3052         expression_t *const ap_expr = expr->ap;
3053         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3054         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3055         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3056         ir_node      *const res     = deref_address(dbgi, type, ap);
3057
3058         ir_node      *const cnst    = get_type_size(expr->base.type);
3059         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
3060
3061         set_value_for_expression_addr(ap_expr, add, ap_addr);
3062
3063         return res;
3064 }
3065
3066 static ir_node *dereference_addr(const unary_expression_t *const expression)
3067 {
3068         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3069         return expression_to_firm(expression->value);
3070 }
3071
3072 /**
3073  * Returns a IR-node representing an lvalue of the given expression.
3074  */
3075 static ir_node *expression_to_addr(const expression_t *expression)
3076 {
3077         switch(expression->kind) {
3078         case EXPR_ARRAY_ACCESS:
3079                 return array_access_addr(&expression->array_access);
3080         case EXPR_CALL:
3081                 return call_expression_to_firm(&expression->call);
3082         case EXPR_COMPOUND_LITERAL:
3083                 return compound_literal_to_firm(&expression->compound_literal);
3084         case EXPR_REFERENCE:
3085                 return reference_addr(&expression->reference);
3086         case EXPR_SELECT:
3087                 return select_addr(&expression->select);
3088         case EXPR_UNARY_DEREFERENCE:
3089                 return dereference_addr(&expression->unary);
3090         default:
3091                 break;
3092         }
3093         panic("trying to get address of non-lvalue");
3094 }
3095
3096 static ir_node *builtin_constant_to_firm(
3097                 const builtin_constant_expression_t *expression)
3098 {
3099         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3100         long     v;
3101
3102         if (is_constant_expression(expression->value)) {
3103                 v = 1;
3104         } else {
3105                 v = 0;
3106         }
3107         return new_Const_long(mode, v);
3108 }
3109
3110 static ir_node *builtin_prefetch_to_firm(
3111                 const builtin_prefetch_expression_t *expression)
3112 {
3113         ir_node *adr = expression_to_firm(expression->adr);
3114         /* no Firm support for prefetch yet */
3115         (void) adr;
3116         return NULL;
3117 }
3118
3119 static ir_node *get_label_block(label_t *label)
3120 {
3121         if (label->block != NULL)
3122                 return label->block;
3123
3124         /* beware: might be called from create initializer with current_ir_graph
3125          * set to const_code_irg. */
3126         ir_graph *rem    = current_ir_graph;
3127         current_ir_graph = current_function;
3128
3129         ir_node *block = new_immBlock();
3130
3131         label->block = block;
3132
3133         ARR_APP1(label_t *, all_labels, label);
3134
3135         current_ir_graph = rem;
3136         return block;
3137 }
3138
3139 /**
3140  * Pointer to a label.  This is used for the
3141  * GNU address-of-label extension.
3142  */
3143 static ir_node *label_address_to_firm(
3144                 const label_address_expression_t *label)
3145 {
3146         ir_node    *block = get_label_block(label->label);
3147         ir_label_t  nr    = get_Block_label(block);
3148
3149         if (nr == 0) {
3150                 nr = get_irp_next_label_nr();
3151                 set_Block_label(block, nr);
3152         }
3153         symconst_symbol value;
3154         value.label = nr;
3155         return new_SymConst(mode_P_code, value, symconst_label);
3156 }
3157
3158 static ir_node *builtin_symbol_to_firm(
3159                 const builtin_symbol_expression_t *expression)
3160 {
3161         /* for gcc compatibility we have to produce (dummy) addresses for some
3162          * builtins */
3163         if (warning.other) {
3164                 warningf(&expression->base.source_position,
3165                                  "taking address of builtin '%Y'", expression->symbol);
3166         }
3167
3168         /* simply create a NULL pointer */
3169         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
3170         ir_node  *res  = new_Const_long(mode, 0);
3171
3172         return res;
3173 }
3174
3175 /**
3176  * creates firm nodes for an expression. The difference between this function
3177  * and expression_to_firm is, that this version might produce mode_b nodes
3178  * instead of mode_Is.
3179  */
3180 static ir_node *_expression_to_firm(const expression_t *expression)
3181 {
3182 #ifndef NDEBUG
3183         if (!constant_folding) {
3184                 assert(!expression->base.transformed);
3185                 ((expression_t*) expression)->base.transformed = true;
3186         }
3187 #endif
3188
3189         switch (expression->kind) {
3190         case EXPR_CHARACTER_CONSTANT:
3191                 return character_constant_to_firm(&expression->conste);
3192         case EXPR_WIDE_CHARACTER_CONSTANT:
3193                 return wide_character_constant_to_firm(&expression->conste);
3194         case EXPR_CONST:
3195                 return const_to_firm(&expression->conste);
3196         case EXPR_STRING_LITERAL:
3197                 return string_literal_to_firm(&expression->string);
3198         case EXPR_WIDE_STRING_LITERAL:
3199                 return wide_string_literal_to_firm(&expression->wide_string);
3200         case EXPR_REFERENCE:
3201                 return reference_expression_to_firm(&expression->reference);
3202         case EXPR_REFERENCE_ENUM_VALUE:
3203                 return reference_expression_enum_value_to_firm(&expression->reference);
3204         case EXPR_CALL:
3205                 return call_expression_to_firm(&expression->call);
3206         EXPR_UNARY_CASES
3207                 return unary_expression_to_firm(&expression->unary);
3208         EXPR_BINARY_CASES
3209                 return binary_expression_to_firm(&expression->binary);
3210         case EXPR_ARRAY_ACCESS:
3211                 return array_access_to_firm(&expression->array_access);
3212         case EXPR_SIZEOF:
3213                 return sizeof_to_firm(&expression->typeprop);
3214         case EXPR_ALIGNOF:
3215                 return alignof_to_firm(&expression->typeprop);
3216         case EXPR_CONDITIONAL:
3217                 return conditional_to_firm(&expression->conditional);
3218         case EXPR_SELECT:
3219                 return select_to_firm(&expression->select);
3220         case EXPR_CLASSIFY_TYPE:
3221                 return classify_type_to_firm(&expression->classify_type);
3222         case EXPR_FUNCNAME:
3223                 return function_name_to_firm(&expression->funcname);
3224         case EXPR_STATEMENT:
3225                 return statement_expression_to_firm(&expression->statement);
3226         case EXPR_VA_START:
3227                 return va_start_expression_to_firm(&expression->va_starte);
3228         case EXPR_VA_ARG:
3229                 return va_arg_expression_to_firm(&expression->va_arge);
3230         case EXPR_BUILTIN_SYMBOL:
3231                 return builtin_symbol_to_firm(&expression->builtin_symbol);
3232         case EXPR_BUILTIN_CONSTANT_P:
3233                 return builtin_constant_to_firm(&expression->builtin_constant);
3234         case EXPR_BUILTIN_PREFETCH:
3235                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3236         case EXPR_OFFSETOF:
3237                 return offsetof_to_firm(&expression->offsetofe);
3238         case EXPR_COMPOUND_LITERAL:
3239                 return compound_literal_to_firm(&expression->compound_literal);
3240         case EXPR_LABEL_ADDRESS:
3241                 return label_address_to_firm(&expression->label_address);
3242
3243         case EXPR_UNKNOWN:
3244         case EXPR_INVALID:
3245                 break;
3246         }
3247         panic("invalid expression found");
3248 }
3249
3250 static bool is_builtin_expect(const expression_t *expression)
3251 {
3252         if (expression->kind != EXPR_CALL)
3253                 return false;
3254
3255         expression_t *function = expression->call.function;
3256         if (function->kind != EXPR_BUILTIN_SYMBOL)
3257                 return false;
3258         if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3259                 return false;
3260
3261         return true;
3262 }
3263
3264 static bool produces_mode_b(const expression_t *expression)
3265 {
3266         switch (expression->kind) {
3267         case EXPR_BINARY_EQUAL:
3268         case EXPR_BINARY_NOTEQUAL:
3269         case EXPR_BINARY_LESS:
3270         case EXPR_BINARY_LESSEQUAL:
3271         case EXPR_BINARY_GREATER:
3272         case EXPR_BINARY_GREATEREQUAL:
3273         case EXPR_BINARY_ISGREATER:
3274         case EXPR_BINARY_ISGREATEREQUAL:
3275         case EXPR_BINARY_ISLESS:
3276         case EXPR_BINARY_ISLESSEQUAL:
3277         case EXPR_BINARY_ISLESSGREATER:
3278         case EXPR_BINARY_ISUNORDERED:
3279         case EXPR_UNARY_NOT:
3280                 return true;
3281
3282         case EXPR_CALL:
3283                 if (is_builtin_expect(expression)) {
3284                         expression_t *argument = expression->call.arguments->expression;
3285                         return produces_mode_b(argument);
3286                 }
3287                 return false;
3288         case EXPR_BINARY_COMMA:
3289                 return produces_mode_b(expression->binary.right);
3290
3291         default:
3292                 return false;
3293         }
3294 }
3295
3296 static ir_node *expression_to_firm(const expression_t *expression)
3297 {
3298         if (!produces_mode_b(expression)) {
3299                 ir_node *res = _expression_to_firm(expression);
3300                 assert(res == NULL || get_irn_mode(res) != mode_b);
3301                 return res;
3302         }
3303
3304         if (is_constant_expression(expression)) {
3305                 ir_node *res  = _expression_to_firm(expression);
3306                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3307                 assert(is_Const(res));
3308                 if (is_Const_null(res)) {
3309                         return new_Const_long(mode, 0);
3310                 } else {
3311                         return new_Const_long(mode, 1);
3312                 }
3313         }
3314
3315         /* we have to produce a 0/1 from the mode_b expression */
3316         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3317         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3318         return produce_condition_result(expression, mode, dbgi);
3319 }
3320
3321 /**
3322  * create a short-circuit expression evaluation that tries to construct
3323  * efficient control flow structures for &&, || and ! expressions
3324  */
3325 static ir_node *create_condition_evaluation(const expression_t *expression,
3326                                             ir_node *true_block,
3327                                             ir_node *false_block)
3328 {
3329         switch(expression->kind) {
3330         case EXPR_UNARY_NOT: {
3331                 const unary_expression_t *unary_expression = &expression->unary;
3332                 create_condition_evaluation(unary_expression->value, false_block,
3333                                             true_block);
3334                 return NULL;
3335         }
3336         case EXPR_BINARY_LOGICAL_AND: {
3337                 const binary_expression_t *binary_expression = &expression->binary;
3338
3339                 ir_node *extra_block = new_immBlock();
3340                 create_condition_evaluation(binary_expression->left, extra_block,
3341                                             false_block);
3342                 mature_immBlock(extra_block);
3343                 set_cur_block(extra_block);
3344                 create_condition_evaluation(binary_expression->right, true_block,
3345                                             false_block);
3346                 return NULL;
3347         }
3348         case EXPR_BINARY_LOGICAL_OR: {
3349                 const binary_expression_t *binary_expression = &expression->binary;
3350
3351                 ir_node *extra_block = new_immBlock();
3352                 create_condition_evaluation(binary_expression->left, true_block,
3353                                             extra_block);
3354                 mature_immBlock(extra_block);
3355                 set_cur_block(extra_block);
3356                 create_condition_evaluation(binary_expression->right, true_block,
3357                                             false_block);
3358                 return NULL;
3359         }
3360         default:
3361                 break;
3362         }
3363
3364         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3365         ir_node  *cond_expr  = _expression_to_firm(expression);
3366         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3367         ir_node  *cond       = new_d_Cond(dbgi, condition);
3368         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3369         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3370
3371         /* set branch prediction info based on __builtin_expect */
3372         if (is_builtin_expect(expression)) {
3373                 call_argument_t *argument = expression->call.arguments->next;
3374                 if (is_constant_expression(argument->expression)) {
3375                         long               cnst = fold_constant(argument->expression);
3376                         cond_jmp_predicate pred;
3377
3378                         if (cnst == 0) {
3379                                 pred = COND_JMP_PRED_FALSE;
3380                         } else {
3381                                 pred = COND_JMP_PRED_TRUE;
3382                         }
3383                         set_Cond_jmp_pred(cond, pred);
3384                 }
3385         }
3386
3387         add_immBlock_pred(true_block, true_proj);
3388         add_immBlock_pred(false_block, false_proj);
3389
3390         set_cur_block(NULL);
3391         return cond_expr;
3392 }
3393
3394
3395 static void create_variable_entity(entity_t *variable,
3396                                    declaration_kind_t declaration_kind,
3397                                    ir_type *parent_type)
3398 {
3399         assert(variable->kind == ENTITY_VARIABLE);
3400         type_t    *const type     = skip_typeref(variable->declaration.type);
3401         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3402         ir_type   *const irtype   = get_ir_type(type);
3403         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3404         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3405
3406         handle_gnu_attributes_ent(irentity, variable);
3407
3408         variable->declaration.kind  = (unsigned char) declaration_kind;
3409         variable->variable.v.entity = irentity;
3410         set_entity_variability(irentity, variability_uninitialized);
3411         set_entity_ld_ident(irentity, create_ld_ident(variable));
3412         if (parent_type == get_tls_type())
3413                 set_entity_allocation(irentity, allocation_automatic);
3414         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3415                 set_entity_allocation(irentity, allocation_static);
3416
3417         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3418                 set_entity_volatility(irentity, volatility_is_volatile);
3419         }
3420 }
3421
3422
3423 typedef struct type_path_entry_t type_path_entry_t;
3424 struct type_path_entry_t {
3425         type_t           *type;
3426         ir_initializer_t *initializer;
3427         size_t            index;
3428         entity_t         *compound_entry;
3429 };
3430
3431 typedef struct type_path_t type_path_t;
3432 struct type_path_t {
3433         type_path_entry_t *path;
3434         type_t            *top_type;
3435         bool               invalid;
3436 };
3437
3438 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3439 {
3440         size_t len = ARR_LEN(path->path);
3441
3442         for (size_t i = 0; i < len; ++i) {
3443                 const type_path_entry_t *entry = & path->path[i];
3444
3445                 type_t *type = skip_typeref(entry->type);
3446                 if (is_type_compound(type)) {
3447                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3448                 } else if (is_type_array(type)) {
3449                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3450                 } else {
3451                         fprintf(stderr, "-INVALID-");
3452                 }
3453         }
3454         fprintf(stderr, "  (");
3455         print_type(path->top_type);
3456         fprintf(stderr, ")");
3457 }
3458
3459 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3460 {
3461         size_t len = ARR_LEN(path->path);
3462         assert(len > 0);
3463         return & path->path[len-1];
3464 }
3465
3466 static type_path_entry_t *append_to_type_path(type_path_t *path)
3467 {
3468         size_t len = ARR_LEN(path->path);
3469         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3470
3471         type_path_entry_t *result = & path->path[len];
3472         memset(result, 0, sizeof(result[0]));
3473         return result;
3474 }
3475
3476 static size_t get_compound_member_count(const compound_type_t *type)
3477 {
3478         compound_t *compound  = type->compound;
3479         size_t      n_members = 0;
3480         entity_t   *member    = compound->members.entities;
3481         for ( ; member != NULL; member = member->base.next) {
3482                 ++n_members;
3483         }
3484
3485         return n_members;
3486 }
3487
3488 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3489 {
3490         type_t *orig_top_type = path->top_type;
3491         type_t *top_type      = skip_typeref(orig_top_type);
3492
3493         assert(is_type_compound(top_type) || is_type_array(top_type));
3494
3495         if (ARR_LEN(path->path) == 0) {
3496                 return NULL;
3497         } else {
3498                 type_path_entry_t *top         = get_type_path_top(path);
3499                 ir_initializer_t  *initializer = top->initializer;
3500                 return get_initializer_compound_value(initializer, top->index);
3501         }
3502 }
3503
3504 static void descend_into_subtype(type_path_t *path)
3505 {
3506         type_t *orig_top_type = path->top_type;
3507         type_t *top_type      = skip_typeref(orig_top_type);
3508
3509         assert(is_type_compound(top_type) || is_type_array(top_type));
3510
3511         ir_initializer_t *initializer = get_initializer_entry(path);
3512
3513         type_path_entry_t *top = append_to_type_path(path);
3514         top->type              = top_type;
3515
3516         size_t len;
3517
3518         if (is_type_compound(top_type)) {
3519                 compound_t *compound = top_type->compound.compound;
3520                 entity_t   *entry    = compound->members.entities;
3521
3522                 top->compound_entry = entry;
3523                 top->index          = 0;
3524                 len                 = get_compound_member_count(&top_type->compound);
3525                 if (entry != NULL) {
3526                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3527                         path->top_type = entry->declaration.type;
3528                 }
3529         } else {
3530                 assert(is_type_array(top_type));
3531                 assert(top_type->array.size > 0);
3532
3533                 top->index     = 0;
3534                 path->top_type = top_type->array.element_type;
3535                 len            = top_type->array.size;
3536         }
3537         if (initializer == NULL
3538                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3539                 initializer = create_initializer_compound(len);
3540                 /* we have to set the entry at the 2nd latest path entry... */
3541                 size_t path_len = ARR_LEN(path->path);
3542                 assert(path_len >= 1);
3543                 if (path_len > 1) {
3544                         type_path_entry_t *entry        = & path->path[path_len-2];
3545                         ir_initializer_t  *tinitializer = entry->initializer;
3546                         set_initializer_compound_value(tinitializer, entry->index,
3547                                                        initializer);
3548                 }
3549         }
3550         top->initializer = initializer;
3551 }
3552
3553 static void ascend_from_subtype(type_path_t *path)
3554 {
3555         type_path_entry_t *top = get_type_path_top(path);
3556
3557         path->top_type = top->type;
3558
3559         size_t len = ARR_LEN(path->path);
3560         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3561 }
3562
3563 static void walk_designator(type_path_t *path, const designator_t *designator)
3564 {
3565         /* designators start at current object type */
3566         ARR_RESIZE(type_path_entry_t, path->path, 1);
3567
3568         for ( ; designator != NULL; designator = designator->next) {
3569                 type_path_entry_t *top         = get_type_path_top(path);
3570                 type_t            *orig_type   = top->type;
3571                 type_t            *type        = skip_typeref(orig_type);
3572
3573                 if (designator->symbol != NULL) {
3574                         assert(is_type_compound(type));
3575                         size_t    index  = 0;
3576                         symbol_t *symbol = designator->symbol;
3577
3578                         compound_t *compound = type->compound.compound;
3579                         entity_t   *iter     = compound->members.entities;
3580                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3581                                 if (iter->base.symbol == symbol) {
3582                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3583                                         break;
3584                                 }
3585                         }
3586                         assert(iter != NULL);
3587
3588                         top->type           = orig_type;
3589                         top->compound_entry = iter;
3590                         top->index          = index;
3591                         orig_type           = iter->declaration.type;
3592                 } else {
3593                         expression_t *array_index = designator->array_index;
3594                         assert(designator->array_index != NULL);
3595                         assert(is_type_array(type));
3596
3597                         long index = fold_constant(array_index);
3598                         assert(index >= 0);
3599 #ifndef NDEBUG
3600                         if (type->array.size_constant) {
3601                                 long array_size = type->array.size;
3602                                 assert(index < array_size);
3603                         }
3604 #endif
3605
3606                         top->type  = orig_type;
3607                         top->index = (size_t) index;
3608                         orig_type  = type->array.element_type;
3609                 }
3610                 path->top_type = orig_type;
3611
3612                 if (designator->next != NULL) {
3613                         descend_into_subtype(path);
3614                 }
3615         }
3616
3617         path->invalid  = false;
3618 }
3619
3620 static void advance_current_object(type_path_t *path)
3621 {
3622         if (path->invalid) {
3623                 /* TODO: handle this... */
3624                 panic("invalid initializer in ast2firm (excessive elements)");
3625         }
3626
3627         type_path_entry_t *top = get_type_path_top(path);
3628
3629         type_t *type = skip_typeref(top->type);
3630         if (is_type_union(type)) {
3631                 top->compound_entry = NULL;
3632         } else if (is_type_struct(type)) {
3633                 entity_t *entry = top->compound_entry;
3634
3635                 top->index++;
3636                 entry               = entry->base.next;
3637                 top->compound_entry = entry;
3638                 if (entry != NULL) {
3639                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3640                         path->top_type = entry->declaration.type;
3641                         return;
3642                 }
3643         } else {
3644                 assert(is_type_array(type));
3645
3646                 top->index++;
3647                 if (!type->array.size_constant || top->index < type->array.size) {
3648                         return;
3649                 }
3650         }
3651
3652         /* we're past the last member of the current sub-aggregate, try if we
3653          * can ascend in the type hierarchy and continue with another subobject */
3654         size_t len = ARR_LEN(path->path);
3655
3656         if (len > 1) {
3657                 ascend_from_subtype(path);
3658                 advance_current_object(path);
3659         } else {
3660                 path->invalid = true;
3661         }
3662 }
3663
3664
3665 static ir_initializer_t *create_ir_initializer(
3666                 const initializer_t *initializer, type_t *type);
3667
3668 static ir_initializer_t *create_ir_initializer_value(
3669                 const initializer_value_t *initializer)
3670 {
3671         if (is_type_compound(initializer->value->base.type)) {
3672                 panic("initializer creation for compounds not implemented yet");
3673         }
3674         ir_node *value = expression_to_firm(initializer->value);
3675         type_t  *type  = initializer->value->base.type;
3676         ir_mode *mode  = get_ir_mode_storage(type);
3677         value          = create_conv(NULL, value, mode);
3678         return create_initializer_const(value);
3679 }
3680
3681 /** test wether type can be initialized by a string constant */
3682 static bool is_string_type(type_t *type)
3683 {
3684         type_t *inner;
3685         if (is_type_pointer(type)) {
3686                 inner = skip_typeref(type->pointer.points_to);
3687         } else if(is_type_array(type)) {
3688                 inner = skip_typeref(type->array.element_type);
3689         } else {
3690                 return false;
3691         }
3692
3693         return is_type_integer(inner);
3694 }
3695
3696 static ir_initializer_t *create_ir_initializer_list(
3697                 const initializer_list_t *initializer, type_t *type)
3698 {
3699         type_path_t path;
3700         memset(&path, 0, sizeof(path));
3701         path.top_type = type;
3702         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3703
3704         descend_into_subtype(&path);
3705
3706         for (size_t i = 0; i < initializer->len; ++i) {
3707                 const initializer_t *sub_initializer = initializer->initializers[i];
3708
3709                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3710                         walk_designator(&path, sub_initializer->designator.designator);
3711                         continue;
3712                 }
3713
3714                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3715                         /* we might have to descend into types until we're at a scalar
3716                          * type */
3717                         while(true) {
3718                                 type_t *orig_top_type = path.top_type;
3719                                 type_t *top_type      = skip_typeref(orig_top_type);
3720
3721                                 if (is_type_scalar(top_type))
3722                                         break;
3723                                 descend_into_subtype(&path);
3724                         }
3725                 } else if (sub_initializer->kind == INITIALIZER_STRING
3726                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3727                         /* we might have to descend into types until we're at a scalar
3728                          * type */
3729                         while (true) {
3730                                 type_t *orig_top_type = path.top_type;
3731                                 type_t *top_type      = skip_typeref(orig_top_type);
3732
3733                                 if (is_string_type(top_type))
3734                                         break;
3735                                 descend_into_subtype(&path);
3736                         }
3737                 }
3738
3739                 ir_initializer_t *sub_irinitializer
3740                         = create_ir_initializer(sub_initializer, path.top_type);
3741
3742                 size_t path_len = ARR_LEN(path.path);
3743                 assert(path_len >= 1);
3744                 type_path_entry_t *entry        = & path.path[path_len-1];
3745                 ir_initializer_t  *tinitializer = entry->initializer;
3746                 set_initializer_compound_value(tinitializer, entry->index,
3747                                                sub_irinitializer);
3748
3749                 advance_current_object(&path);
3750         }
3751
3752         assert(ARR_LEN(path.path) >= 1);
3753         ir_initializer_t *result = path.path[0].initializer;
3754         DEL_ARR_F(path.path);
3755
3756         return result;
3757 }
3758
3759 static ir_initializer_t *create_ir_initializer_string(
3760                 const initializer_string_t *initializer, type_t *type)
3761 {
3762         type = skip_typeref(type);
3763
3764         size_t            string_len    = initializer->string.size;
3765         assert(type->kind == TYPE_ARRAY);
3766         assert(type->array.size_constant);
3767         size_t            len           = type->array.size;
3768         ir_initializer_t *irinitializer = create_initializer_compound(len);
3769
3770         const char *string = initializer->string.begin;
3771         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
3772
3773         for (size_t i = 0; i < len; ++i) {
3774                 char c = 0;
3775                 if (i < string_len)
3776                         c = string[i];
3777
3778                 tarval           *tv = new_tarval_from_long(c, mode);
3779                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3780
3781                 set_initializer_compound_value(irinitializer, i, char_initializer);
3782         }
3783
3784         return irinitializer;
3785 }
3786
3787 static ir_initializer_t *create_ir_initializer_wide_string(
3788                 const initializer_wide_string_t *initializer, type_t *type)
3789 {
3790         size_t            string_len    = initializer->string.size;
3791         assert(type->kind == TYPE_ARRAY);
3792         assert(type->array.size_constant);
3793         size_t            len           = type->array.size;
3794         ir_initializer_t *irinitializer = create_initializer_compound(len);
3795
3796         const wchar_rep_t *string = initializer->string.begin;
3797         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3798
3799         for (size_t i = 0; i < len; ++i) {
3800                 wchar_rep_t c = 0;
3801                 if (i < string_len) {
3802                         c = string[i];
3803                 }
3804                 tarval *tv = new_tarval_from_long(c, mode);
3805                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3806
3807                 set_initializer_compound_value(irinitializer, i, char_initializer);
3808         }
3809
3810         return irinitializer;
3811 }
3812
3813 static ir_initializer_t *create_ir_initializer(
3814                 const initializer_t *initializer, type_t *type)
3815 {
3816         switch(initializer->kind) {
3817                 case INITIALIZER_STRING:
3818                         return create_ir_initializer_string(&initializer->string, type);
3819
3820                 case INITIALIZER_WIDE_STRING:
3821                         return create_ir_initializer_wide_string(&initializer->wide_string,
3822                                                                  type);
3823
3824                 case INITIALIZER_LIST:
3825                         return create_ir_initializer_list(&initializer->list, type);
3826
3827                 case INITIALIZER_VALUE:
3828                         return create_ir_initializer_value(&initializer->value);
3829
3830                 case INITIALIZER_DESIGNATOR:
3831                         panic("unexpected designator initializer found");
3832         }
3833         panic("unknown initializer");
3834 }
3835
3836 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3837                 ir_node *base_addr)
3838 {
3839         if (is_atomic_type(type)) {
3840                 ir_mode *mode = get_type_mode(type);
3841                 tarval  *zero = get_mode_null(mode);
3842                 ir_node *cnst = new_d_Const(dbgi, zero);
3843
3844                 /* TODO: bitfields */
3845                 ir_node *mem    = get_store();
3846                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3847                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3848                 set_store(proj_m);
3849         } else {
3850                 assert(is_compound_type(type));
3851
3852                 int n_members;
3853                 if (is_Array_type(type)) {
3854                         assert(has_array_upper_bound(type, 0));
3855                         n_members = get_array_upper_bound_int(type, 0);
3856                 } else {
3857                         n_members = get_compound_n_members(type);
3858                 }
3859
3860                 for (int i = 0; i < n_members; ++i) {
3861                         ir_node *addr;
3862                         ir_type *irtype;
3863                         if (is_Array_type(type)) {
3864                                 ir_entity *entity   = get_array_element_entity(type);
3865                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3866                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3867                                 ir_node   *in[1]    = { cnst };
3868                                 irtype = get_array_element_type(type);
3869                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3870                         } else {
3871                                 ir_entity *member = get_compound_member(type, i);
3872
3873                                 irtype = get_entity_type(member);
3874                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3875                         }
3876
3877                         create_dynamic_null_initializer(irtype, dbgi, addr);
3878                 }
3879         }
3880 }
3881
3882 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3883                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3884 {
3885         switch(get_initializer_kind(initializer)) {
3886         case IR_INITIALIZER_NULL: {
3887                 create_dynamic_null_initializer(type, dbgi, base_addr);
3888                 return;
3889         }
3890         case IR_INITIALIZER_CONST: {
3891                 ir_node *node     = get_initializer_const_value(initializer);
3892                 ir_mode *mode     = get_irn_mode(node);
3893                 ir_type *ent_type = get_entity_type(entity);
3894
3895                 /* is it a bitfield type? */
3896                 if (is_Primitive_type(ent_type) &&
3897                                 get_primitive_base_type(ent_type) != NULL) {
3898                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3899                         return;
3900                 }
3901
3902                 assert(get_type_mode(type) == mode);
3903                 ir_node *mem    = get_store();
3904                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3905                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3906                 set_store(proj_m);
3907                 return;
3908         }
3909         case IR_INITIALIZER_TARVAL: {
3910                 tarval  *tv       = get_initializer_tarval_value(initializer);
3911                 ir_mode *mode     = get_tarval_mode(tv);
3912                 ir_node *cnst     = new_d_Const(dbgi, tv);
3913                 ir_type *ent_type = get_entity_type(entity);
3914
3915                 /* is it a bitfield type? */
3916                 if (is_Primitive_type(ent_type) &&
3917                                 get_primitive_base_type(ent_type) != NULL) {
3918                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3919                         return;
3920                 }
3921
3922                 assert(get_type_mode(type) == mode);
3923                 ir_node *mem    = get_store();
3924                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3925                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3926                 set_store(proj_m);
3927                 return;
3928         }
3929         case IR_INITIALIZER_COMPOUND: {
3930                 assert(is_compound_type(type));
3931                 int n_members;
3932                 if (is_Array_type(type)) {
3933                         assert(has_array_upper_bound(type, 0));
3934                         n_members = get_array_upper_bound_int(type, 0);
3935                 } else {
3936                         n_members = get_compound_n_members(type);
3937                 }
3938
3939                 if (get_initializer_compound_n_entries(initializer)
3940                                 != (unsigned) n_members)
3941                         panic("initializer doesn't match compound type");
3942
3943                 for (int i = 0; i < n_members; ++i) {
3944                         ir_node   *addr;
3945                         ir_type   *irtype;
3946                         ir_entity *sub_entity;
3947                         if (is_Array_type(type)) {
3948                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3949                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
3950                                 ir_node   *in[1]    = { cnst };
3951                                 irtype     = get_array_element_type(type);
3952                                 sub_entity = get_array_element_entity(type);
3953                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3954                                                        sub_entity);
3955                         } else {
3956                                 sub_entity = get_compound_member(type, i);
3957                                 irtype     = get_entity_type(sub_entity);
3958                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3959                                                              sub_entity);
3960                         }
3961
3962                         ir_initializer_t *sub_init
3963                                 = get_initializer_compound_value(initializer, i);
3964
3965                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3966                                                        addr);
3967                 }
3968                 return;
3969         }
3970         }
3971
3972         panic("invalid IR_INITIALIZER found");
3973 }
3974
3975 static void create_dynamic_initializer(ir_initializer_t *initializer,
3976                 dbg_info *dbgi, ir_entity *entity)
3977 {
3978         ir_node *frame     = get_local_frame(entity);
3979         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3980         ir_type *type      = get_entity_type(entity);
3981
3982         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3983 }
3984
3985 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3986                                      ir_entity *entity, type_t *type)
3987 {
3988         ir_node *memory = get_store();
3989         ir_node *nomem  = new_NoMem();
3990         ir_node *frame  = get_irg_frame(current_ir_graph);
3991         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3992
3993         if (initializer->kind == INITIALIZER_VALUE) {
3994                 initializer_value_t *initializer_value = &initializer->value;
3995
3996                 ir_node *value = expression_to_firm(initializer_value->value);
3997                 type = skip_typeref(type);
3998                 assign_value(dbgi, addr, type, value);
3999                 return;
4000         }
4001
4002         if (!is_constant_initializer(initializer)) {
4003                 ir_initializer_t *irinitializer
4004                         = create_ir_initializer(initializer, type);
4005
4006                 create_dynamic_initializer(irinitializer, dbgi, entity);
4007                 return;
4008         }
4009
4010         /* create the ir_initializer */
4011         ir_graph *const old_current_ir_graph = current_ir_graph;
4012         current_ir_graph = get_const_code_irg();
4013
4014         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4015
4016         assert(current_ir_graph == get_const_code_irg());
4017         current_ir_graph = old_current_ir_graph;
4018
4019         /* create a "template" entity which is copied to the entity on the stack */
4020         ident     *const id          = id_unique("initializer.%u");
4021         ir_type   *const irtype      = get_ir_type(type);
4022         ir_type   *const global_type = get_glob_type();
4023         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4024         set_entity_ld_ident(init_entity, id);
4025
4026         set_entity_variability(init_entity, variability_initialized);
4027         set_entity_visibility(init_entity, visibility_local);
4028         set_entity_allocation(init_entity, allocation_static);
4029
4030         set_entity_initializer(init_entity, irinitializer);
4031
4032         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4033         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4034
4035         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4036         set_store(copyb_mem);
4037 }
4038
4039 static void create_initializer_local_variable_entity(entity_t *entity)
4040 {
4041         assert(entity->kind == ENTITY_VARIABLE);
4042         initializer_t *initializer = entity->variable.initializer;
4043         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4044         ir_entity     *irentity    = entity->variable.v.entity;
4045         type_t        *type        = entity->declaration.type;
4046         create_local_initializer(initializer, dbgi, irentity, type);
4047 }
4048
4049 static void create_variable_initializer(entity_t *entity)
4050 {
4051         assert(entity->kind == ENTITY_VARIABLE);
4052         initializer_t *initializer = entity->variable.initializer;
4053         if (initializer == NULL)
4054                 return;
4055
4056         declaration_kind_t declaration_kind
4057                 = (declaration_kind_t) entity->declaration.kind;
4058         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4059                 create_initializer_local_variable_entity(entity);
4060                 return;
4061         }
4062
4063         type_t            *type = entity->declaration.type;
4064         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4065
4066         if (initializer->kind == INITIALIZER_VALUE) {
4067                 initializer_value_t *initializer_value = &initializer->value;
4068                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4069
4070                 ir_node *value = expression_to_firm(initializer_value->value);
4071
4072                 type_t  *type = initializer_value->value->base.type;
4073                 ir_mode *mode = get_ir_mode_storage(type);
4074                 value = create_conv(dbgi, value, mode);
4075                 value = do_strict_conv(dbgi, value);
4076
4077                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4078                         set_value(entity->variable.v.value_number, value);
4079                 } else {
4080                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4081
4082                         ir_entity *irentity = entity->variable.v.entity;
4083
4084                         if (tq & TYPE_QUALIFIER_CONST) {
4085                                 set_entity_variability(irentity, variability_constant);
4086                         } else {
4087                                 set_entity_variability(irentity, variability_initialized);
4088                         }
4089                         set_atomic_ent_value(irentity, value);
4090                 }
4091         } else {
4092                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4093                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4094
4095                 ir_entity        *irentity        = entity->variable.v.entity;
4096                 ir_initializer_t *irinitializer
4097                         = create_ir_initializer(initializer, type);
4098
4099                 if (tq & TYPE_QUALIFIER_CONST) {
4100                         set_entity_variability(irentity, variability_constant);
4101                 } else {
4102                         set_entity_variability(irentity, variability_initialized);
4103                 }
4104                 set_entity_initializer(irentity, irinitializer);
4105         }
4106 }
4107
4108 static void create_variable_length_array(entity_t *entity)
4109 {
4110         assert(entity->kind == ENTITY_VARIABLE);
4111         assert(entity->variable.initializer == NULL);
4112
4113         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4114         entity->variable.v.vla_base = NULL;
4115
4116         /* TODO: record VLA somewhere so we create the free node when we leave
4117          * it's scope */
4118 }
4119
4120 static void allocate_variable_length_array(entity_t *entity)
4121 {
4122         assert(entity->kind == ENTITY_VARIABLE);
4123         assert(entity->variable.initializer == NULL);
4124         assert(get_cur_block() != NULL);
4125
4126         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4127         type_t   *type      = entity->declaration.type;
4128         ir_type  *el_type   = get_ir_type(type->array.element_type);
4129
4130         /* make sure size_node is calculated */
4131         get_type_size(type);
4132         ir_node  *elems = type->array.size_node;
4133         ir_node  *mem   = get_store();
4134         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4135
4136         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4137         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4138         set_store(proj_m);
4139
4140         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4141         entity->variable.v.vla_base = addr;
4142 }
4143
4144 /**
4145  * Creates a Firm local variable from a declaration.
4146  */
4147 static void create_local_variable(entity_t *entity)
4148 {
4149         assert(entity->kind == ENTITY_VARIABLE);
4150         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4151
4152         bool needs_entity = entity->variable.address_taken;
4153         type_t *type = skip_typeref(entity->declaration.type);
4154
4155         /* is it a variable length array? */
4156         if (is_type_array(type) && !type->array.size_constant) {
4157                 create_variable_length_array(entity);
4158                 return;
4159         } else if (is_type_array(type) || is_type_compound(type)) {
4160                 needs_entity = true;
4161         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4162                 needs_entity = true;
4163         }
4164
4165         if (needs_entity) {
4166                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4167                 create_variable_entity(entity,
4168                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4169                                        frame_type);
4170         } else {
4171                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4172                 entity->variable.v.value_number = next_value_number_function;
4173                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4174                                         entity);
4175                 ++next_value_number_function;
4176         }
4177 }
4178
4179 static void create_local_static_variable(entity_t *entity)
4180 {
4181         assert(entity->kind == ENTITY_VARIABLE);
4182         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4183
4184         type_t    *const type     = skip_typeref(entity->declaration.type);
4185         ir_type   *const var_type = entity->variable.thread_local ?
4186                 get_tls_type() : get_glob_type();
4187         ir_type   *const irtype   = get_ir_type(type);
4188         dbg_info  *const dbgi     = get_dbg_info(&entity->base.source_position);
4189
4190         size_t l = strlen(entity->base.symbol->string);
4191         char   buf[l + sizeof(".%u")];
4192         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4193         ident     *const id = id_unique(buf);
4194
4195         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4196
4197         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4198                 set_entity_volatility(irentity, volatility_is_volatile);
4199         }
4200
4201         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4202         entity->variable.v.entity = irentity;
4203         set_entity_ld_ident(irentity, id);
4204         set_entity_variability(irentity, variability_uninitialized);
4205         set_entity_visibility(irentity, visibility_local);
4206         set_entity_allocation(irentity, entity->variable.thread_local ?
4207                 allocation_automatic : allocation_static);
4208
4209         ir_graph *const old_current_ir_graph = current_ir_graph;
4210         current_ir_graph = get_const_code_irg();
4211
4212         create_variable_initializer(entity);
4213
4214         assert(current_ir_graph == get_const_code_irg());
4215         current_ir_graph = old_current_ir_graph;
4216 }
4217
4218
4219
4220 static void return_statement_to_firm(return_statement_t *statement)
4221 {
4222         if (get_cur_block() == NULL)
4223                 return;
4224
4225         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4226         type_t   *type        = current_function_entity->declaration.type;
4227         ir_type  *func_irtype = get_ir_type(type);
4228
4229
4230         ir_node *in[1];
4231         int      in_len;
4232         if (get_method_n_ress(func_irtype) > 0) {
4233                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4234
4235                 if (statement->value != NULL) {
4236                         ir_node *node = expression_to_firm(statement->value);
4237                         if (!is_compound_type(res_type)) {
4238                                 type_t  *type = statement->value->base.type;
4239                                 ir_mode *mode = get_ir_mode_storage(type);
4240                                 node          = create_conv(dbgi, node, mode);
4241                                 node          = do_strict_conv(dbgi, node);
4242                         }
4243                         in[0] = node;
4244                 } else {
4245                         ir_mode *mode;
4246                         if (is_compound_type(res_type)) {
4247                                 mode = mode_P_data;
4248                         } else {
4249                                 mode = get_type_mode(res_type);
4250                         }
4251                         in[0] = new_Unknown(mode);
4252                 }
4253                 in_len = 1;
4254         } else {
4255                 /* build return_value for its side effects */
4256                 if (statement->value != NULL) {
4257                         expression_to_firm(statement->value);
4258                 }
4259                 in_len = 0;
4260         }
4261
4262         ir_node  *store = get_store();
4263         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4264
4265         ir_node *end_block = get_irg_end_block(current_ir_graph);
4266         add_immBlock_pred(end_block, ret);
4267
4268         set_cur_block(NULL);
4269 }
4270
4271 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4272 {
4273         if (get_cur_block() == NULL)
4274                 return NULL;
4275
4276         return expression_to_firm(statement->expression);
4277 }
4278
4279 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4280 {
4281         entity_t *entity = compound->scope.entities;
4282         for ( ; entity != NULL; entity = entity->base.next) {
4283                 if (!is_declaration(entity))
4284                         continue;
4285
4286                 create_local_declaration(entity);
4287         }
4288
4289         ir_node     *result    = NULL;
4290         statement_t *statement = compound->statements;
4291         for ( ; statement != NULL; statement = statement->base.next) {
4292                 if (statement->base.next == NULL
4293                                 && statement->kind == STATEMENT_EXPRESSION) {
4294                         result = expression_statement_to_firm(
4295                                         &statement->expression);
4296                         break;
4297                 }
4298                 statement_to_firm(statement);
4299         }
4300
4301         return result;
4302 }
4303
4304 static void create_global_variable(entity_t *entity)
4305 {
4306         assert(entity->kind == ENTITY_VARIABLE);
4307
4308         ir_visibility vis;
4309         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4310                 case STORAGE_CLASS_STATIC: vis = visibility_local;              break;
4311                 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4312                 case STORAGE_CLASS_NONE:   vis = visibility_external_visible;   break;
4313
4314                 default: panic("Invalid storage class for global variable");
4315         }
4316
4317         ir_type *var_type = entity->variable.thread_local ?
4318                 get_tls_type() : get_glob_type();
4319         create_variable_entity(entity,
4320                         DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4321         set_entity_visibility(entity->variable.v.entity, vis);
4322 }
4323
4324 static void create_local_declaration(entity_t *entity)
4325 {
4326         assert(is_declaration(entity));
4327
4328         /* construct type */
4329         (void) get_ir_type(entity->declaration.type);
4330         if (entity->base.symbol == NULL) {
4331                 return;
4332         }
4333
4334         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4335         case STORAGE_CLASS_STATIC:
4336                 create_local_static_variable(entity);
4337                 return;
4338         case STORAGE_CLASS_EXTERN:
4339                 if (entity->kind == ENTITY_FUNCTION) {
4340                         assert(entity->function.statement == NULL);
4341                         get_function_entity(entity);
4342                 } else {
4343                         create_global_variable(entity);
4344                         create_variable_initializer(entity);
4345                 }
4346                 return;
4347         case STORAGE_CLASS_NONE:
4348         case STORAGE_CLASS_AUTO:
4349         case STORAGE_CLASS_REGISTER:
4350                 if (entity->kind == ENTITY_FUNCTION) {
4351                         if (entity->function.statement != NULL) {
4352                                 get_function_entity(entity);
4353                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4354                                 enqueue_inner_function(entity);
4355                         } else {
4356                                 get_function_entity(entity);
4357                         }
4358                 } else {
4359                         create_local_variable(entity);
4360                 }
4361                 return;
4362         case STORAGE_CLASS_TYPEDEF:
4363                 break;
4364         }
4365         panic("invalid storage class found");
4366 }
4367
4368 static void initialize_local_declaration(entity_t *entity)
4369 {
4370         if (entity->base.symbol == NULL)
4371                 return;
4372
4373         switch ((declaration_kind_t) entity->declaration.kind) {
4374         case DECLARATION_KIND_LOCAL_VARIABLE:
4375         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4376                 create_variable_initializer(entity);
4377                 return;
4378
4379         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4380                 allocate_variable_length_array(entity);
4381                 return;
4382
4383         case DECLARATION_KIND_COMPOUND_MEMBER:
4384         case DECLARATION_KIND_GLOBAL_VARIABLE:
4385         case DECLARATION_KIND_FUNCTION:
4386         case DECLARATION_KIND_INNER_FUNCTION:
4387                 return;
4388
4389         case DECLARATION_KIND_PARAMETER:
4390         case DECLARATION_KIND_PARAMETER_ENTITY:
4391                 panic("can't initialize parameters");
4392
4393         case DECLARATION_KIND_UNKNOWN:
4394                 panic("can't initialize unknown declaration");
4395         }
4396         panic("invalid declaration kind");
4397 }
4398
4399 static void declaration_statement_to_firm(declaration_statement_t *statement)
4400 {
4401         entity_t *      entity = statement->declarations_begin;
4402         entity_t *const last   = statement->declarations_end;
4403         if (entity != NULL) {
4404                 for ( ;; entity = entity->base.next) {
4405                         if (is_declaration(entity)) {
4406                                 initialize_local_declaration(entity);
4407                         } else if (entity->kind == ENTITY_TYPEDEF) {
4408                                 type_t *const type = entity->typedefe.type;
4409                                 if (is_type_array(type) && type->array.is_vla)
4410                                         get_vla_size(&type->array);
4411                         }
4412                         if (entity == last)
4413                                 break;
4414                 }
4415         }
4416 }
4417
4418 static void if_statement_to_firm(if_statement_t *statement)
4419 {
4420         ir_node *cur_block = get_cur_block();
4421
4422         ir_node *fallthrough_block = NULL;
4423
4424         /* the true (blocks) */
4425         ir_node *true_block = NULL;
4426         if (statement->true_statement != NULL) {
4427                 true_block = new_immBlock();
4428                 set_cur_block(true_block);
4429                 statement_to_firm(statement->true_statement);
4430                 if (get_cur_block() != NULL) {
4431                         ir_node *jmp = new_Jmp();
4432                         if (fallthrough_block == NULL)
4433                                 fallthrough_block = new_immBlock();
4434                         add_immBlock_pred(fallthrough_block, jmp);
4435                 }
4436         }
4437
4438         /* the false (blocks) */
4439         ir_node *false_block = NULL;
4440         if (statement->false_statement != NULL) {
4441                 false_block = new_immBlock();
4442                 set_cur_block(false_block);
4443
4444                 statement_to_firm(statement->false_statement);
4445                 if (get_cur_block() != NULL) {
4446                         ir_node *jmp = new_Jmp();
4447                         if (fallthrough_block == NULL)
4448                                 fallthrough_block = new_immBlock();
4449                         add_immBlock_pred(fallthrough_block, jmp);
4450                 }
4451         }
4452
4453         /* create the condition */
4454         if (cur_block != NULL) {
4455                 if (true_block == NULL || false_block == NULL) {
4456                         if (fallthrough_block == NULL)
4457                                 fallthrough_block = new_immBlock();
4458                         if (true_block == NULL)
4459                                 true_block = fallthrough_block;
4460                         if (false_block == NULL)
4461                                 false_block = fallthrough_block;
4462                 }
4463
4464                 set_cur_block(cur_block);
4465                 create_condition_evaluation(statement->condition, true_block,
4466                                             false_block);
4467         }
4468
4469         mature_immBlock(true_block);
4470         if (false_block != fallthrough_block && false_block != NULL) {
4471                 mature_immBlock(false_block);
4472         }
4473         if (fallthrough_block != NULL) {
4474                 mature_immBlock(fallthrough_block);
4475         }
4476
4477         set_cur_block(fallthrough_block);
4478 }
4479
4480 static void while_statement_to_firm(while_statement_t *statement)
4481 {
4482         ir_node *jmp = NULL;
4483         if (get_cur_block() != NULL) {
4484                 jmp = new_Jmp();
4485         }
4486
4487         /* create the header block */
4488         ir_node *header_block = new_immBlock();
4489         if (jmp != NULL) {
4490                 add_immBlock_pred(header_block, jmp);
4491         }
4492
4493         /* the loop body */
4494         ir_node *old_continue_label = continue_label;
4495         ir_node *old_break_label    = break_label;
4496         continue_label              = header_block;
4497         break_label                 = NULL;
4498
4499         ir_node *body_block = new_immBlock();
4500         set_cur_block(body_block);
4501         statement_to_firm(statement->body);
4502         ir_node *false_block = break_label;
4503
4504         assert(continue_label == header_block);
4505         continue_label = old_continue_label;
4506         break_label    = old_break_label;
4507
4508         if (get_cur_block() != NULL) {
4509                 jmp = new_Jmp();
4510                 add_immBlock_pred(header_block, jmp);
4511         }
4512
4513         /* shortcut for while(true) */
4514         if (is_constant_expression(statement->condition)
4515                         && fold_constant(statement->condition) != 0) {
4516                 set_cur_block(header_block);
4517                 ir_node *header_jmp = new_Jmp();
4518                 add_immBlock_pred(body_block, header_jmp);
4519
4520                 keep_alive(body_block);
4521                 keep_all_memory(body_block);
4522                 set_cur_block(body_block);
4523         } else {
4524                 if (false_block == NULL) {
4525                         false_block = new_immBlock();
4526                 }
4527
4528                 /* create the condition */
4529                 set_cur_block(header_block);
4530
4531                 create_condition_evaluation(statement->condition, body_block,
4532                                             false_block);
4533         }
4534
4535         mature_immBlock(body_block);
4536         mature_immBlock(header_block);
4537         if (false_block != NULL) {
4538                 mature_immBlock(false_block);
4539         }
4540
4541         set_cur_block(false_block);
4542 }
4543
4544 static void do_while_statement_to_firm(do_while_statement_t *statement)
4545 {
4546         ir_node *jmp = NULL;
4547         if (get_cur_block() != NULL) {
4548                 jmp = new_Jmp();
4549         }
4550
4551         /* create the header block */
4552         ir_node *header_block = new_immBlock();
4553
4554         /* the loop body */
4555         ir_node *body_block = new_immBlock();
4556         if (jmp != NULL) {
4557                 add_immBlock_pred(body_block, jmp);
4558         }
4559
4560         ir_node *old_continue_label = continue_label;
4561         ir_node *old_break_label    = break_label;
4562         continue_label              = header_block;
4563         break_label                 = NULL;
4564
4565         set_cur_block(body_block);
4566         statement_to_firm(statement->body);
4567         ir_node *false_block = break_label;
4568
4569         assert(continue_label == header_block);
4570         continue_label = old_continue_label;
4571         break_label    = old_break_label;
4572
4573         if (get_cur_block() != NULL) {
4574                 ir_node *body_jmp = new_Jmp();
4575                 add_immBlock_pred(header_block, body_jmp);
4576                 mature_immBlock(header_block);
4577         }
4578
4579         if (false_block == NULL) {
4580                 false_block = new_immBlock();
4581         }
4582
4583         /* create the condition */
4584         set_cur_block(header_block);
4585
4586         create_condition_evaluation(statement->condition, body_block, false_block);
4587         mature_immBlock(body_block);
4588         mature_immBlock(header_block);
4589         mature_immBlock(false_block);
4590
4591         set_cur_block(false_block);
4592 }
4593
4594 static void for_statement_to_firm(for_statement_t *statement)
4595 {
4596         ir_node *jmp = NULL;
4597
4598         /* create declarations */
4599         entity_t *entity = statement->scope.entities;
4600         for ( ; entity != NULL; entity = entity->base.next) {
4601                 if (!is_declaration(entity))
4602                         continue;
4603
4604                 create_local_declaration(entity);
4605         }
4606
4607         if (get_cur_block() != NULL) {
4608                 entity = statement->scope.entities;
4609                 for ( ; entity != NULL; entity = entity->base.next) {
4610                         if (!is_declaration(entity))
4611                                 continue;
4612
4613                         initialize_local_declaration(entity);
4614                 }
4615
4616                 if (statement->initialisation != NULL) {
4617                         expression_to_firm(statement->initialisation);
4618                 }
4619
4620                 jmp = new_Jmp();
4621         }
4622
4623
4624         /* create the step block */
4625         ir_node *const step_block = new_immBlock();
4626         set_cur_block(step_block);
4627         if (statement->step != NULL) {
4628                 expression_to_firm(statement->step);
4629         }
4630         ir_node *const step_jmp = new_Jmp();
4631
4632         /* create the header block */
4633         ir_node *const header_block = new_immBlock();
4634         set_cur_block(header_block);
4635         if (jmp != NULL) {
4636                 add_immBlock_pred(header_block, jmp);
4637         }
4638         add_immBlock_pred(header_block, step_jmp);
4639
4640         /* the false block */
4641         ir_node *const false_block = new_immBlock();
4642
4643         /* the loop body */
4644         ir_node *body_block;
4645         if (statement->body != NULL) {
4646                 ir_node *const old_continue_label = continue_label;
4647                 ir_node *const old_break_label    = break_label;
4648                 continue_label = step_block;
4649                 break_label    = false_block;
4650
4651                 body_block = new_immBlock();
4652                 set_cur_block(body_block);
4653                 statement_to_firm(statement->body);
4654
4655                 assert(continue_label == step_block);
4656                 assert(break_label    == false_block);
4657                 continue_label = old_continue_label;
4658                 break_label    = old_break_label;
4659
4660                 if (get_cur_block() != NULL) {
4661                         jmp = new_Jmp();
4662                         add_immBlock_pred(step_block, jmp);
4663                 }
4664         } else {
4665                 body_block = step_block;
4666         }
4667
4668         /* create the condition */
4669         set_cur_block(header_block);
4670         if (statement->condition != NULL) {
4671                 create_condition_evaluation(statement->condition, body_block,
4672                                             false_block);
4673         } else {
4674                 keep_alive(header_block);
4675                 keep_all_memory(header_block);
4676                 jmp = new_Jmp();
4677                 add_immBlock_pred(body_block, jmp);
4678         }
4679
4680         mature_immBlock(body_block);
4681         mature_immBlock(false_block);
4682         mature_immBlock(step_block);
4683         mature_immBlock(header_block);
4684         mature_immBlock(false_block);
4685
4686         set_cur_block(false_block);
4687 }
4688
4689 static void create_jump_statement(const statement_t *statement,
4690                                   ir_node *target_block)
4691 {
4692         if (get_cur_block() == NULL)
4693                 return;
4694
4695         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4696         ir_node  *jump = new_d_Jmp(dbgi);
4697         add_immBlock_pred(target_block, jump);
4698
4699         set_cur_block(NULL);
4700 }
4701
4702 static ir_node *get_break_label(void)
4703 {
4704         if (break_label == NULL) {
4705                 break_label = new_immBlock();
4706         }
4707         return break_label;
4708 }
4709
4710 static void switch_statement_to_firm(switch_statement_t *statement)
4711 {
4712         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4713
4714         ir_node *expression  = expression_to_firm(statement->expression);
4715         ir_node *cond        = new_d_Cond(dbgi, expression);
4716
4717         set_cur_block(NULL);
4718
4719         ir_node *const old_switch_cond       = current_switch_cond;
4720         ir_node *const old_break_label       = break_label;
4721         const bool     old_saw_default_label = saw_default_label;
4722         saw_default_label                    = false;
4723         current_switch_cond                  = cond;
4724         break_label                          = NULL;
4725         switch_statement_t *const old_switch = current_switch;
4726         current_switch                       = statement;
4727
4728         /* determine a free number for the default label */
4729         unsigned long num_cases = 0;
4730         long def_nr = 0;
4731         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4732                 if (l->expression == NULL) {
4733                         /* default case */
4734                         continue;
4735                 }
4736                 if (l->last_case >= l->first_case)
4737                         num_cases += l->last_case - l->first_case + 1;
4738                 if (l->last_case > def_nr)
4739                         def_nr = l->last_case;
4740         }
4741
4742         if (def_nr == INT_MAX) {
4743                 /* Bad: an overflow will occurr, we cannot be sure that the
4744                  * maximum + 1 is a free number. Scan the values a second
4745                  * time to find a free number.
4746                  */
4747                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4748
4749                 memset(bits, 0, (num_cases + 7) >> 3);
4750                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4751                         if (l->expression == NULL) {
4752                                 /* default case */
4753                                 continue;
4754                         }
4755                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4756                         if (start < num_cases && l->last_case >= 0) {
4757                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4758                                         (unsigned long)l->last_case : num_cases - 1;
4759                                 for (unsigned long cns = start; cns <= end; ++cns) {
4760                                         bits[cns >> 3] |= (1 << (cns & 7));
4761                                 }
4762                         }
4763                 }
4764                 /* We look at the first num_cases constants:
4765                  * Either they are densed, so we took the last (num_cases)
4766                  * one, or they are non densed, so we will find one free
4767                  * there...
4768                  */
4769                 unsigned long i;
4770                 for (i = 0; i < num_cases; ++i)
4771                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4772                                 break;
4773
4774                 free(bits);
4775                 def_nr = i;
4776         } else {
4777                 ++def_nr;
4778         }
4779         statement->default_proj_nr = def_nr;
4780
4781         if (statement->body != NULL) {
4782                 statement_to_firm(statement->body);
4783         }
4784
4785         if (get_cur_block() != NULL) {
4786                 ir_node *jmp = new_Jmp();
4787                 add_immBlock_pred(get_break_label(), jmp);
4788         }
4789
4790         if (!saw_default_label) {
4791                 set_cur_block(get_nodes_block(cond));
4792                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4793                                                         statement->default_proj_nr);
4794                 add_immBlock_pred(get_break_label(), proj);
4795         }
4796
4797         if (break_label != NULL) {
4798                 mature_immBlock(break_label);
4799         }
4800         set_cur_block(break_label);
4801
4802         assert(current_switch_cond == cond);
4803         current_switch      = old_switch;
4804         current_switch_cond = old_switch_cond;
4805         break_label         = old_break_label;
4806         saw_default_label   = old_saw_default_label;
4807 }
4808
4809 static void case_label_to_firm(const case_label_statement_t *statement)
4810 {
4811         if (statement->is_empty_range)
4812                 return;
4813
4814         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4815
4816         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4817
4818         ir_node *proj;
4819         ir_node *block     = new_immBlock();
4820
4821         set_cur_block(get_nodes_block(current_switch_cond));
4822         if (statement->expression != NULL) {
4823                 long pn     = statement->first_case;
4824                 long end_pn = statement->last_case;
4825                 assert(pn <= end_pn);
4826                 /* create jumps for all cases in the given range */
4827                 do {
4828                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4829                         add_immBlock_pred(block, proj);
4830                 } while(pn++ < end_pn);
4831         } else {
4832                 saw_default_label = true;
4833                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4834                                          current_switch->default_proj_nr);
4835
4836                 add_immBlock_pred(block, proj);
4837         }
4838
4839         if (fallthrough != NULL) {
4840                 add_immBlock_pred(block, fallthrough);
4841         }
4842         mature_immBlock(block);
4843         set_cur_block(block);
4844
4845         if (statement->statement != NULL) {
4846                 statement_to_firm(statement->statement);
4847         }
4848 }
4849
4850 static void label_to_firm(const label_statement_t *statement)
4851 {
4852         ir_node *block = get_label_block(statement->label);
4853
4854         if (get_cur_block() != NULL) {
4855                 ir_node *jmp = new_Jmp();
4856                 add_immBlock_pred(block, jmp);
4857         }
4858
4859         set_cur_block(block);
4860         keep_alive(block);
4861         keep_all_memory(block);
4862
4863         if (statement->statement != NULL) {
4864                 statement_to_firm(statement->statement);
4865         }
4866 }
4867
4868 static void goto_to_firm(const goto_statement_t *statement)
4869 {
4870         if (get_cur_block() == NULL)
4871                 return;
4872
4873         if (statement->expression) {
4874                 ir_node  *irn  = expression_to_firm(statement->expression);
4875                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4876                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4877
4878                 set_irn_link(ijmp, ijmp_list);
4879                 ijmp_list = ijmp;
4880         } else {
4881                 ir_node *block = get_label_block(statement->label);
4882                 ir_node *jmp   = new_Jmp();
4883                 add_immBlock_pred(block, jmp);
4884         }
4885         set_cur_block(NULL);
4886 }
4887
4888 static void asm_statement_to_firm(const asm_statement_t *statement)
4889 {
4890         bool needs_memory = false;
4891
4892         if (statement->is_volatile) {
4893                 needs_memory = true;
4894         }
4895
4896         size_t         n_clobbers = 0;
4897         asm_clobber_t *clobber    = statement->clobbers;
4898         for ( ; clobber != NULL; clobber = clobber->next) {
4899                 const char *clobber_str = clobber->clobber.begin;
4900
4901                 if (!be_is_valid_clobber(clobber_str)) {
4902                         errorf(&statement->base.source_position,
4903                                    "invalid clobber '%s' specified", clobber->clobber);
4904                         continue;
4905                 }
4906
4907                 if (strcmp(clobber_str, "memory") == 0) {
4908                         needs_memory = true;
4909                         continue;
4910                 }
4911
4912                 ident *id = new_id_from_str(clobber_str);
4913                 obstack_ptr_grow(&asm_obst, id);
4914                 ++n_clobbers;
4915         }
4916         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4917         ident **clobbers = NULL;
4918         if (n_clobbers > 0) {
4919                 clobbers = obstack_finish(&asm_obst);
4920         }
4921
4922         size_t n_inputs  = 0;
4923         asm_argument_t *argument = statement->inputs;
4924         for ( ; argument != NULL; argument = argument->next)
4925                 n_inputs++;
4926         size_t n_outputs = 0;
4927         argument = statement->outputs;
4928         for ( ; argument != NULL; argument = argument->next)
4929                 n_outputs++;
4930
4931         unsigned next_pos = 0;
4932
4933         ir_node *ins[n_inputs + n_outputs + 1];
4934         size_t   in_size = 0;
4935
4936         ir_asm_constraint tmp_in_constraints[n_outputs];
4937
4938         const expression_t *out_exprs[n_outputs];
4939         ir_node            *out_addrs[n_outputs];
4940         size_t              out_size = 0;
4941
4942         argument = statement->outputs;
4943         for ( ; argument != NULL; argument = argument->next) {
4944                 const char *constraints = argument->constraints.begin;
4945                 asm_constraint_flags_t asm_flags
4946                         = be_parse_asm_constraints(constraints);
4947
4948                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4949                         warningf(&statement->base.source_position,
4950                                "some constraints in '%s' are not supported", constraints);
4951                 }
4952                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4953                         errorf(&statement->base.source_position,
4954                                "some constraints in '%s' are invalid", constraints);
4955                         continue;
4956                 }
4957                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4958                         errorf(&statement->base.source_position,
4959                                "no write flag specified for output constraints '%s'",
4960                                constraints);
4961                         continue;
4962                 }
4963
4964                 unsigned pos = next_pos++;
4965                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4966                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4967                         expression_t *expr = argument->expression;
4968                         ir_node      *addr = expression_to_addr(expr);
4969                         /* in+output, construct an artifical same_as constraint on the
4970                          * input */
4971                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4972                                 char     buf[64];
4973                                 ir_node *value = get_value_from_lvalue(expr, addr);
4974
4975                                 snprintf(buf, sizeof(buf), "%u", pos);
4976
4977                                 ir_asm_constraint constraint;
4978                                 constraint.pos              = pos;
4979                                 constraint.constraint       = new_id_from_str(buf);
4980                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
4981                                 tmp_in_constraints[in_size] = constraint;
4982                                 ins[in_size] = value;
4983
4984                                 ++in_size;
4985                         }
4986
4987                         out_exprs[out_size] = expr;
4988                         out_addrs[out_size] = addr;
4989                         ++out_size;
4990                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4991                         /* pure memory ops need no input (but we have to make sure we
4992                          * attach to the memory) */
4993                         assert(! (asm_flags &
4994                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4995                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4996                         needs_memory = true;
4997
4998                         /* we need to attach the address to the inputs */
4999                         expression_t *expr = argument->expression;
5000
5001                         ir_asm_constraint constraint;
5002                         constraint.pos              = pos;
5003                         constraint.constraint       = new_id_from_str(constraints);
5004                         constraint.mode             = NULL;
5005                         tmp_in_constraints[in_size] = constraint;
5006
5007                         ins[in_size]          = expression_to_addr(expr);
5008                         ++in_size;
5009                         continue;
5010                 } else {
5011                         errorf(&statement->base.source_position,
5012                                "only modifiers but no place set in constraints '%s'",
5013                                constraints);
5014                         continue;
5015                 }
5016
5017                 ir_asm_constraint constraint;
5018                 constraint.pos        = pos;
5019                 constraint.constraint = new_id_from_str(constraints);
5020                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5021
5022                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5023         }
5024         assert(obstack_object_size(&asm_obst)
5025                         == out_size * sizeof(ir_asm_constraint));
5026         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5027
5028
5029         obstack_grow(&asm_obst, tmp_in_constraints,
5030                      in_size * sizeof(tmp_in_constraints[0]));
5031         /* find and count input and output arguments */
5032         argument = statement->inputs;
5033         for ( ; argument != NULL; argument = argument->next) {
5034                 const char *constraints = argument->constraints.begin;
5035                 asm_constraint_flags_t asm_flags
5036                         = be_parse_asm_constraints(constraints);
5037
5038                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5039                         errorf(&statement->base.source_position,
5040                                "some constraints in '%s' are not supported", constraints);
5041                         continue;
5042                 }
5043                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5044                         errorf(&statement->base.source_position,
5045                                "some constraints in '%s' are invalid", constraints);
5046                         continue;
5047                 }
5048                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5049                         errorf(&statement->base.source_position,
5050                                "write flag specified for input constraints '%s'",
5051                                constraints);
5052                         continue;
5053                 }
5054
5055                 ir_node *input;
5056                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5057                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5058                         /* we can treat this as "normal" input */
5059                         input = expression_to_firm(argument->expression);
5060                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5061                         /* pure memory ops need no input (but we have to make sure we
5062                          * attach to the memory) */
5063                         assert(! (asm_flags &
5064                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5065                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5066                         needs_memory = true;
5067                         input = expression_to_addr(argument->expression);
5068                 } else {
5069                         errorf(&statement->base.source_position,
5070                                "only modifiers but no place set in constraints '%s'",
5071                                constraints);
5072                         continue;
5073                 }
5074
5075                 ir_asm_constraint constraint;
5076                 constraint.pos        = next_pos++;
5077                 constraint.constraint = new_id_from_str(constraints);
5078                 constraint.mode       = get_irn_mode(input);
5079
5080                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5081                 ins[in_size++] = input;
5082         }
5083
5084         if (needs_memory) {
5085                 ir_asm_constraint constraint;
5086                 constraint.pos        = next_pos++;
5087                 constraint.constraint = new_id_from_str("");
5088                 constraint.mode       = mode_M;
5089
5090                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5091                 ins[in_size++] = get_store();
5092         }
5093
5094         assert(obstack_object_size(&asm_obst)
5095                         == in_size * sizeof(ir_asm_constraint));
5096         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5097
5098         /* create asm node */
5099         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5100
5101         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5102
5103         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5104                                   out_size, output_constraints,
5105                                   n_clobbers, clobbers, asm_text);
5106
5107         if (statement->is_volatile) {
5108                 set_irn_pinned(node, op_pin_state_pinned);
5109         } else {
5110                 set_irn_pinned(node, op_pin_state_floats);
5111         }
5112
5113         /* create output projs & connect them */
5114         if (needs_memory) {
5115                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5116                 set_store(projm);
5117         }
5118
5119         size_t i;
5120         for (i = 0; i < out_size; ++i) {
5121                 const expression_t *out_expr = out_exprs[i];
5122                 long                pn       = i;
5123                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5124                 ir_node            *proj     = new_Proj(node, mode, pn);
5125                 ir_node            *addr     = out_addrs[i];
5126
5127                 set_value_for_expression_addr(out_expr, proj, addr);
5128         }
5129 }
5130
5131 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
5132         statement_to_firm(statement->try_statement);
5133         warningf(&statement->base.source_position, "structured exception handling ignored");
5134 }
5135
5136 static void     leave_statement_to_firm(leave_statement_t *statement) {
5137         errorf(&statement->base.source_position, "__leave not supported yet");
5138 }
5139
5140 /**
5141  * Transform a statement.
5142  */
5143 static void statement_to_firm(statement_t *statement)
5144 {
5145 #ifndef NDEBUG
5146         assert(!statement->base.transformed);
5147         statement->base.transformed = true;
5148 #endif
5149
5150         switch (statement->kind) {
5151         case STATEMENT_INVALID:
5152                 panic("invalid statement found");
5153         case STATEMENT_EMPTY:
5154                 /* nothing */
5155                 return;
5156         case STATEMENT_COMPOUND:
5157                 compound_statement_to_firm(&statement->compound);
5158                 return;
5159         case STATEMENT_RETURN:
5160                 return_statement_to_firm(&statement->returns);
5161                 return;
5162         case STATEMENT_EXPRESSION:
5163                 expression_statement_to_firm(&statement->expression);
5164                 return;
5165         case STATEMENT_IF:
5166                 if_statement_to_firm(&statement->ifs);
5167                 return;
5168         case STATEMENT_WHILE:
5169                 while_statement_to_firm(&statement->whiles);
5170                 return;
5171         case STATEMENT_DO_WHILE:
5172                 do_while_statement_to_firm(&statement->do_while);
5173                 return;
5174         case STATEMENT_DECLARATION:
5175                 declaration_statement_to_firm(&statement->declaration);
5176                 return;
5177         case STATEMENT_BREAK:
5178                 create_jump_statement(statement, get_break_label());
5179                 return;
5180         case STATEMENT_CONTINUE:
5181                 create_jump_statement(statement, continue_label);
5182                 return;
5183         case STATEMENT_SWITCH:
5184                 switch_statement_to_firm(&statement->switchs);
5185                 return;
5186         case STATEMENT_CASE_LABEL:
5187                 case_label_to_firm(&statement->case_label);
5188                 return;
5189         case STATEMENT_FOR:
5190                 for_statement_to_firm(&statement->fors);
5191                 return;
5192         case STATEMENT_LABEL:
5193                 label_to_firm(&statement->label);
5194                 return;
5195         case STATEMENT_GOTO:
5196                 goto_to_firm(&statement->gotos);
5197                 return;
5198         case STATEMENT_ASM:
5199                 asm_statement_to_firm(&statement->asms);
5200                 return;
5201         case STATEMENT_MS_TRY:
5202                 ms_try_statement_to_firm(&statement->ms_try);
5203                 return;
5204         case STATEMENT_LEAVE:
5205                 leave_statement_to_firm(&statement->leave);
5206                 return;
5207         }
5208         panic("statement not implemented");
5209 }
5210
5211 static int count_local_variables(const entity_t *entity,
5212                                  const entity_t *const last)
5213 {
5214         int count = 0;
5215         for (; entity != NULL; entity = entity->base.next) {
5216                 type_t *type;
5217                 bool    address_taken;
5218
5219                 if (entity->kind == ENTITY_VARIABLE) {
5220                         type          = skip_typeref(entity->declaration.type);
5221                         address_taken = entity->variable.address_taken;
5222                 } else if (entity->kind == ENTITY_PARAMETER) {
5223                         type          = skip_typeref(entity->declaration.type);
5224                         address_taken = entity->parameter.address_taken;
5225                 } else {
5226                         continue;
5227                 }
5228
5229                 if (!address_taken && is_type_scalar(type))
5230                         ++count;
5231
5232                 if (entity == last)
5233                         break;
5234         }
5235         return count;
5236 }
5237
5238 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5239 {
5240         int *const count = env;
5241
5242         switch (stmt->kind) {
5243         case STATEMENT_DECLARATION: {
5244                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5245                 *count += count_local_variables(decl_stmt->declarations_begin,
5246                                 decl_stmt->declarations_end);
5247                 break;
5248         }
5249
5250         case STATEMENT_FOR:
5251                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5252                 break;
5253
5254         default:
5255                 break;
5256         }
5257 }
5258
5259 static int get_function_n_local_vars(entity_t *entity)
5260 {
5261         int count = 0;
5262
5263         /* count parameters */
5264         count += count_local_variables(entity->function.parameters.entities, NULL);
5265
5266         /* count local variables declared in body */
5267         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5268                         &count);
5269         return count;
5270 }
5271
5272 static void initialize_function_parameters(entity_t *entity)
5273 {
5274         assert(entity->kind == ENTITY_FUNCTION);
5275         ir_graph *irg             = current_ir_graph;
5276         ir_node  *args            = get_irg_args(irg);
5277         ir_node  *start_block     = get_irg_start_block(irg);
5278         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5279
5280         int       n         = 0;
5281         entity_t *parameter = entity->function.parameters.entities;
5282         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5283                 assert(parameter->kind == ENTITY_PARAMETER);
5284                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5285                 type_t *type = skip_typeref(parameter->declaration.type);
5286
5287                 bool needs_entity = parameter->parameter.address_taken;
5288                 assert(!is_type_array(type));
5289                 if (is_type_compound(type)) {
5290                         needs_entity = true;
5291                 }
5292
5293                 if (needs_entity) {
5294                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5295                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5296                         set_entity_ident(entity, id);
5297
5298                         parameter->declaration.kind
5299                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5300                         parameter->parameter.v.entity = entity;
5301                         continue;
5302                 }
5303
5304                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5305                 ir_mode *param_mode   = get_type_mode(param_irtype);
5306
5307                 long     pn    = n;
5308                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5309
5310                 ir_mode *mode = get_ir_mode_storage(type);
5311                 value = create_conv(NULL, value, mode);
5312                 value = do_strict_conv(NULL, value);
5313
5314                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5315                 parameter->parameter.v.value_number = next_value_number_function;
5316                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5317                                         parameter);
5318                 ++next_value_number_function;
5319
5320                 set_value(parameter->parameter.v.value_number, value);
5321         }
5322 }
5323
5324 /**
5325  * Handle additional decl modifiers for IR-graphs
5326  *
5327  * @param irg            the IR-graph
5328  * @param dec_modifiers  additional modifiers
5329  */
5330 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5331 {
5332         if (decl_modifiers & DM_RETURNS_TWICE) {
5333                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5334                 set_irg_additional_property(irg, mtp_property_returns_twice);
5335         }
5336         if (decl_modifiers & DM_NORETURN) {
5337                 /* TRUE if the declaration includes the Microsoft
5338                    __declspec(noreturn) specifier. */
5339                 set_irg_additional_property(irg, mtp_property_noreturn);
5340         }
5341         if (decl_modifiers & DM_NOTHROW) {
5342                 /* TRUE if the declaration includes the Microsoft
5343                    __declspec(nothrow) specifier. */
5344                 set_irg_additional_property(irg, mtp_property_nothrow);
5345         }
5346         if (decl_modifiers & DM_NAKED) {
5347                 /* TRUE if the declaration includes the Microsoft
5348                    __declspec(naked) specifier. */
5349                 set_irg_additional_property(irg, mtp_property_naked);
5350         }
5351         if (decl_modifiers & DM_FORCEINLINE) {
5352                 /* TRUE if the declaration includes the
5353                    Microsoft __forceinline specifier. */
5354                 set_irg_inline_property(irg, irg_inline_forced);
5355         }
5356         if (decl_modifiers & DM_NOINLINE) {
5357                 /* TRUE if the declaration includes the Microsoft
5358                    __declspec(noinline) specifier. */
5359                 set_irg_inline_property(irg, irg_inline_forbidden);
5360         }
5361 }
5362
5363 static void add_function_pointer(ir_type *segment, ir_entity *method,
5364                                  const char *unique_template)
5365 {
5366         ir_type   *method_type  = get_entity_type(method);
5367         ident     *id           = id_unique(unique_template);
5368         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5369
5370         ident     *ide          = id_unique(unique_template);
5371         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5372         ir_graph  *irg          = get_const_code_irg();
5373         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5374                                                            method, NULL);
5375
5376         set_entity_compiler_generated(ptr, 1);
5377         set_entity_variability(ptr, variability_constant);
5378         set_atomic_ent_value(ptr, val);
5379 }
5380
5381 /**
5382  * Generate possible IJmp branches to a given label block.
5383  */
5384 static void gen_ijmp_branches(ir_node *block) {
5385         ir_node *ijmp;
5386         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5387                 add_immBlock_pred(block, ijmp);
5388         }
5389 }
5390
5391 /**
5392  * Create code for a function.
5393  */
5394 static void create_function(entity_t *entity)
5395 {
5396         assert(entity->kind == ENTITY_FUNCTION);
5397         ir_entity *function_entity = get_function_entity(entity);
5398
5399         if (entity->function.statement == NULL)
5400                 return;
5401
5402         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5403                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5404                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5405         }
5406         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5407                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5408                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5409         }
5410
5411         current_function_entity = entity;
5412         current_function_name   = NULL;
5413         current_funcsig         = NULL;
5414
5415         assert(all_labels == NULL);
5416         all_labels = NEW_ARR_F(label_t *, 0);
5417         ijmp_list  = NULL;
5418
5419         int       n_local_vars = get_function_n_local_vars(entity);
5420         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5421
5422         ir_graph *old_current_function = current_function;
5423         current_function = irg;
5424
5425         set_irg_fp_model(irg, firm_opt.fp_model);
5426         tarval_enable_fp_ops(1);
5427         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5428
5429         ir_node *first_block = get_cur_block();
5430
5431         /* set inline flags */
5432         if (entity->function.is_inline)
5433                 set_irg_inline_property(irg, irg_inline_recomended);
5434         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5435
5436         next_value_number_function = 0;
5437         initialize_function_parameters(entity);
5438
5439         statement_to_firm(entity->function.statement);
5440
5441         ir_node *end_block = get_irg_end_block(irg);
5442
5443         /* do we have a return statement yet? */
5444         if (get_cur_block() != NULL) {
5445                 type_t *type = skip_typeref(entity->declaration.type);
5446                 assert(is_type_function(type));
5447                 const function_type_t *func_type   = &type->function;
5448                 const type_t          *return_type
5449                         = skip_typeref(func_type->return_type);
5450
5451                 ir_node *ret;
5452                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5453                         ret = new_Return(get_store(), 0, NULL);
5454                 } else {
5455                         ir_mode *mode;
5456                         if (is_type_scalar(return_type)) {
5457                                 mode = get_ir_mode_storage(func_type->return_type);
5458                         } else {
5459                                 mode = mode_P_data;
5460                         }
5461
5462                         ir_node *in[1];
5463                         /* §5.1.2.2.3 main implicitly returns 0 */
5464                         if (is_main(entity)) {
5465                                 in[0] = new_Const(get_mode_null(mode));
5466                         } else {
5467                                 in[0] = new_Unknown(mode);
5468                         }
5469                         ret = new_Return(get_store(), 1, in);
5470                 }
5471                 add_immBlock_pred(end_block, ret);
5472         }
5473
5474         bool has_computed_gotos = false;
5475         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5476                 label_t *label = all_labels[i];
5477                 if (label->address_taken) {
5478                         gen_ijmp_branches(label->block);
5479                         has_computed_gotos = true;
5480                 }
5481                 mature_immBlock(label->block);
5482         }
5483         if (has_computed_gotos) {
5484                 /* if we have computed goto's in the function, we cannot inline it */
5485                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5486                         warningf(&entity->base.source_position,
5487                                  "function '%Y' can never be inlined because it contains a computed goto",
5488                                  entity->base.symbol);
5489                 }
5490                 set_irg_inline_property(irg, irg_inline_forbidden);
5491         }
5492
5493         DEL_ARR_F(all_labels);
5494         all_labels = NULL;
5495
5496         mature_immBlock(first_block);
5497         mature_immBlock(end_block);
5498
5499         irg_finalize_cons(irg);
5500
5501         /* finalize the frame type */
5502         ir_type *frame_type = get_irg_frame_type(irg);
5503         int      n          = get_compound_n_members(frame_type);
5504         int      align_all  = 4;
5505         int      offset     = 0;
5506         for (int i = 0; i < n; ++i) {
5507                 ir_entity *entity      = get_compound_member(frame_type, i);
5508                 ir_type   *entity_type = get_entity_type(entity);
5509
5510                 int align = get_type_alignment_bytes(entity_type);
5511                 if (align > align_all)
5512                         align_all = align;
5513                 int misalign = 0;
5514                 if (align > 0) {
5515                         misalign  = offset % align;
5516                         if (misalign > 0) {
5517                                 offset += align - misalign;
5518                         }
5519                 }
5520
5521                 set_entity_offset(entity, offset);
5522                 offset += get_type_size_bytes(entity_type);
5523         }
5524         set_type_size_bytes(frame_type, offset);
5525         set_type_alignment_bytes(frame_type, align_all);
5526
5527         irg_vrfy(irg);
5528         current_function = old_current_function;
5529
5530         /* create inner functions */
5531         entity_t *inner;
5532         for (inner = next_inner_function(); inner != NULL;
5533              inner = next_inner_function()) {
5534                 create_function(inner);
5535         }
5536 }
5537
5538 static void scope_to_firm(scope_t *scope)
5539 {
5540         /* first pass: create declarations */
5541         entity_t *entity = scope->entities;
5542         for ( ; entity != NULL; entity = entity->base.next) {
5543                 if (entity->base.symbol == NULL)
5544                         continue;
5545
5546                 if (entity->kind == ENTITY_FUNCTION) {
5547                         get_function_entity(entity);
5548                 } else if (entity->kind == ENTITY_VARIABLE) {
5549                         create_global_variable(entity);
5550                 }
5551         }
5552
5553         /* second pass: create code/initializers */
5554         entity = scope->entities;
5555         for ( ; entity != NULL; entity = entity->base.next) {
5556                 if (entity->base.symbol == NULL)
5557                         continue;
5558
5559                 if (entity->kind == ENTITY_FUNCTION) {
5560                         create_function(entity);
5561                 } else if (entity->kind == ENTITY_VARIABLE) {
5562                         assert(entity->declaration.kind
5563                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5564                         current_ir_graph = get_const_code_irg();
5565                         create_variable_initializer(entity);
5566                 }
5567         }
5568 }
5569
5570 void init_ast2firm(void)
5571 {
5572         obstack_init(&asm_obst);
5573         init_atomic_modes();
5574
5575         /* OS option must be set to the backend */
5576         switch (firm_opt.os_support) {
5577         case OS_SUPPORT_MINGW:
5578                 create_ld_ident = create_name_win32;
5579                 break;
5580         case OS_SUPPORT_LINUX:
5581                 create_ld_ident = create_name_linux_elf;
5582                 break;
5583         case OS_SUPPORT_MACHO:
5584                 create_ld_ident = create_name_macho;
5585                 break;
5586         default:
5587                 panic("unexpected OS support mode");
5588         }
5589
5590         /* create idents for all known runtime functions */
5591         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5592                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5593         }
5594
5595         entitymap_init(&entitymap);
5596 }
5597
5598 static void init_ir_types(void)
5599 {
5600         static int ir_types_initialized = 0;
5601         if (ir_types_initialized)
5602                 return;
5603         ir_types_initialized = 1;
5604
5605         ir_type_int        = get_ir_type(type_int);
5606         ir_type_const_char = get_ir_type(type_const_char);
5607         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5608         ir_type_void       = get_ir_type(type_void);
5609
5610         const backend_params *be_params = be_get_backend_param();
5611         mode_float_arithmetic = be_params->mode_float_arithmetic;
5612 }
5613
5614 void exit_ast2firm(void)
5615 {
5616         entitymap_destroy(&entitymap);
5617         obstack_free(&asm_obst, NULL);
5618 }
5619
5620 static void global_asm_to_firm(statement_t *s)
5621 {
5622         for (; s != NULL; s = s->base.next) {
5623                 assert(s->kind == STATEMENT_ASM);
5624
5625                 char const *const text = s->asms.asm_text.begin;
5626                 size_t            size = s->asms.asm_text.size;
5627
5628                 /* skip the last \0 */
5629                 if (text[size - 1] == '\0')
5630                         --size;
5631
5632                 ident *const id = new_id_from_chars(text, size);
5633                 add_irp_asm(id);
5634         }
5635 }
5636
5637 void translation_unit_to_firm(translation_unit_t *unit)
5638 {
5639         /* just to be sure */
5640         continue_label           = NULL;
5641         break_label              = NULL;
5642         current_switch_cond      = NULL;
5643         current_translation_unit = unit;
5644
5645         init_ir_types();
5646         inner_functions = NEW_ARR_F(entity_t *, 0);
5647
5648         scope_to_firm(&unit->scope);
5649         global_asm_to_firm(unit->global_asm);
5650
5651         DEL_ARR_F(inner_functions);
5652         inner_functions  = NULL;
5653
5654         current_ir_graph         = NULL;
5655         current_translation_unit = NULL;
5656 }