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