nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25 #include <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "adt/util.h"
  36 #include "symbol_t.h"
  37 #include "token_t.h"
  38 #include "type_t.h"
  39 #include "ast_t.h"
  40 #include "entity_t.h"
  41 #include "parser.h"
  42 #include "diagnostic.h"
  43 #include "lang_features.h"
  44 #include "types.h"
  45 #include "type_hash.h"
  46 #include "mangle.h"
  47 #include "walk_statements.h"
  48 #include "warning.h"
  49 #include "printer.h"
  50 #include "entitymap_t.h"
  51 #include "driver/firm_opt.h"
  52
  53 typedef struct trampoline_region trampoline_region;
  54 struct trampoline_region {
  55         ir_entity        *function;    /**< The function that is called by this trampoline */
  56         ir_entity        *region;      /**< created region for the trampoline */
  57 };
  58
  59 fp_model_t firm_fp_model = fp_model_precise;
  60
  61 static const backend_params *be_params;
  62
  63 static ir_type *ir_type_char;
  64 static ir_type *ir_type_const_char;
  65 static ir_type *ir_type_wchar_t;
  66 static ir_type *ir_type_void;
  67 static ir_type *ir_type_int;
  68
  69 /* architecture specific floating point arithmetic mode (if any) */
  70 static ir_mode *mode_float_arithmetic;
  71
  72 /* alignment of stack parameters */
  73 static unsigned stack_param_align;
  74
  75 static int        next_value_number_function;
  76 static ir_node   *continue_label;
  77 static ir_node   *break_label;
  78 static ir_node   *current_switch_cond;
  79 static bool       saw_default_label;
  80 static label_t  **all_labels;
  81 static entity_t **inner_functions;
  82 static ir_node   *ijmp_list;
  83 static bool       constant_folding;
  84 static bool       initializer_use_bitfield_basetype;
  85
  86 static const entity_t     *current_function_entity;
  87 static ir_node            *current_function_name;
  88 static ir_node            *current_funcsig;
  89 static switch_statement_t *current_switch;
  90 static ir_graph           *current_function;
  91 static translation_unit_t *current_translation_unit;
  92 static trampoline_region  *current_trampolines;
  93 static ir_type            *current_outer_frame;
  94 static ir_node            *current_static_link;
  95
  96 static entitymap_t  entitymap;
  97
  98 static struct obstack asm_obst;
  99
 100 typedef enum declaration_kind_t {
 101         DECLARATION_KIND_UNKNOWN,
 102         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 103         DECLARATION_KIND_GLOBAL_VARIABLE,
 104         DECLARATION_KIND_LOCAL_VARIABLE,
 105         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 106         DECLARATION_KIND_PARAMETER,
 107         DECLARATION_KIND_PARAMETER_ENTITY,
 108         DECLARATION_KIND_FUNCTION,
 109         DECLARATION_KIND_COMPOUND_MEMBER,
 110         DECLARATION_KIND_INNER_FUNCTION
 111 } declaration_kind_t;
 112
 113 static ir_mode *get_ir_mode_storage(type_t *type);
 114
 115 static ir_type *get_ir_type_incomplete(type_t *type);
 116
 117 static void enqueue_inner_function(entity_t *entity)
 118 {
 119         if (inner_functions == NULL)
 120                 inner_functions = NEW_ARR_F(entity_t *, 0);
 121         ARR_APP1(entity_t*, inner_functions, entity);
 122 }
 123
 124 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 125 {
 126         const entity_t *entity = get_irg_loc_description(irg, pos);
 127
 128         if (entity != NULL) {
 129                 source_position_t const *const pos = &entity->base.source_position;
 130                 warningf(WARN_UNINITIALIZED, pos, "'%N' might be used uninitialized", entity);
 131         }
 132         return new_r_Unknown(irg, mode);
 133 }
 134
 135 static const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 136 {
 137         const source_position_t *pos = (const source_position_t*) dbg;
 138         if (pos == NULL)
 139                 return NULL;
 140         if (line != NULL)
 141                 *line = pos->lineno;
 142         return pos->input_name;
 143 }
 144
 145 static dbg_info *get_dbg_info(const source_position_t *pos)
 146 {
 147         return (dbg_info*) pos;
 148 }
 149
 150 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 151                                     const type_dbg_info *dbg)
 152 {
 153         assert(dbg != NULL);
 154         print_to_buffer(buffer, buffer_size);
 155         const type_t *type = (const type_t*) dbg;
 156         print_type(type);
 157         finish_print_to_buffer();
 158 }
 159
 160 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 161 {
 162         return (type_dbg_info*) type;
 163 }
 164
 165 /* is the current block a reachable one? */
 166 static bool currently_reachable(void)
 167 {
 168         ir_node *const block = get_cur_block();
 169         return block != NULL && !is_Bad(block);
 170 }
 171
 172 static void set_unreachable_now(void)
 173 {
 174         set_cur_block(NULL);
 175 }
 176
 177 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 178
 179 static ir_mode *mode_int, *mode_uint;
 180
 181 static ir_node *_expression_to_firm(const expression_t *expression);
 182 static ir_node *expression_to_firm(const expression_t *expression);
 183 static void create_local_declaration(entity_t *entity);
 184
 185 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 186 {
 187         unsigned flags = get_atomic_type_flags(kind);
 188         unsigned size  = get_atomic_type_size(kind);
 189         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 190                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 191                 char            name[64];
 192                 ir_mode_sort    sort;
 193                 unsigned        bit_size     = size * 8;
 194                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 195                 unsigned        modulo_shift;
 196                 ir_mode_arithmetic arithmetic;
 197
 198                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 199                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 200                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 201                                  bit_size);
 202                         sort         = irms_int_number;
 203                         arithmetic   = irma_twos_complement;
 204                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 205                 } else {
 206                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 207                         snprintf(name, sizeof(name), "F%u", bit_size);
 208                         sort         = irms_float_number;
 209                         arithmetic   = irma_ieee754;
 210                         modulo_shift = 0;
 211                 }
 212                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 213                                    modulo_shift);
 214         }
 215
 216         return NULL;
 217 }
 218
 219 /**
 220  * Initialises the atomic modes depending on the machine size.
 221  */
 222 static void init_atomic_modes(void)
 223 {
 224         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 225                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 226         }
 227         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 228         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 229
 230         /* there's no real void type in firm */
 231         atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
 232
 233         /* initialize pointer modes */
 234         char            name[64];
 235         ir_mode_sort    sort         = irms_reference;
 236         unsigned        bit_size     = machine_size;
 237         bool            is_signed    = 0;
 238         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 239         unsigned        modulo_shift
 240                 = bit_size < machine_size ? machine_size : bit_size;
 241
 242         snprintf(name, sizeof(name), "p%u", machine_size);
 243         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 244                                         modulo_shift);
 245
 246         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 247         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 248
 249         /* Hmm, pointers should be machine size */
 250         set_modeP_data(ptr_mode);
 251         set_modeP_code(ptr_mode);
 252 }
 253
 254 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 255 {
 256         assert(kind <= ATOMIC_TYPE_LAST);
 257         return atomic_modes[kind];
 258 }
 259
 260 static ir_node *get_vla_size(array_type_t *const type)
 261 {
 262         ir_node *size_node = type->size_node;
 263         if (size_node == NULL) {
 264                 size_node = expression_to_firm(type->size_expression);
 265                 type->size_node = size_node;
 266         }
 267         return size_node;
 268 }
 269
 270 /**
 271  * Return a node representing the size of a type.
 272  */
 273 static ir_node *get_type_size_node(type_t *type)
 274 {
 275         type = skip_typeref(type);
 276
 277         if (is_type_array(type) && type->array.is_vla) {
 278                 ir_node *size_node = get_vla_size(&type->array);
 279                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 280                 ir_mode *mode      = get_irn_mode(size_node);
 281                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 282                 return real_size;
 283         }
 284
 285         ir_mode *mode = get_ir_mode_storage(type_size_t);
 286         symconst_symbol sym;
 287         sym.type_p = get_ir_type(type);
 288         return new_SymConst(mode, sym, symconst_type_size);
 289 }
 290
 291 static unsigned count_parameters(const function_type_t *function_type)
 292 {
 293         unsigned count = 0;
 294
 295         function_parameter_t *parameter = function_type->parameters;
 296         for ( ; parameter != NULL; parameter = parameter->next) {
 297                 ++count;
 298         }
 299
 300         return count;
 301 }
 302
 303 /**
 304  * Creates a Firm type for an atomic type
 305  */
 306 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 307 {
 308         ir_mode        *mode      = atomic_modes[akind];
 309         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 310         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 311         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 312
 313         set_type_alignment_bytes(irtype, alignment);
 314
 315         return irtype;
 316 }
 317
 318 /**
 319  * Creates a Firm type for a complex type
 320  */
 321 static ir_type *create_complex_type(const complex_type_t *type)
 322 {
 323         atomic_type_kind_t  kind = type->akind;
 324         ir_mode            *mode = atomic_modes[kind];
 325         ident              *id   = get_mode_ident(mode);
 326
 327         (void) id;
 328
 329         /* FIXME: finish the array */
 330         return NULL;
 331 }
 332
 333 /**
 334  * Creates a Firm type for an imaginary type
 335  */
 336 static ir_type *create_imaginary_type(imaginary_type_t *type)
 337 {
 338         return create_atomic_type(type->akind, (const type_t*) type);
 339 }
 340
 341 /**
 342  * return type of a parameter (and take transparent union gnu extension into
 343  * account)
 344  */
 345 static type_t *get_parameter_type(type_t *orig_type)
 346 {
 347         type_t *type = skip_typeref(orig_type);
 348         if (is_type_union(type)
 349                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 350                 compound_t *compound = type->compound.compound;
 351                 type                 = compound->members.entities->declaration.type;
 352         }
 353
 354         return type;
 355 }
 356
 357 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 358 {
 359         type_t        *return_type  = skip_typeref(function_type->return_type);
 360
 361         int            n_parameters = count_parameters(function_type)
 362                                        + (for_closure ? 1 : 0);
 363         int            n_results    = return_type == type_void ? 0 : 1;
 364         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 365         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 366
 367         if (return_type != type_void) {
 368                 ir_type *restype = get_ir_type(return_type);
 369                 set_method_res_type(irtype, 0, restype);
 370         }
 371
 372         function_parameter_t *parameter = function_type->parameters;
 373         int                   n         = 0;
 374         if (for_closure) {
 375                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 376                 set_method_param_type(irtype, n, p_irtype);
 377                 ++n;
 378         }
 379         for ( ; parameter != NULL; parameter = parameter->next) {
 380                 type_t  *type     = get_parameter_type(parameter->type);
 381                 ir_type *p_irtype = get_ir_type(type);
 382                 set_method_param_type(irtype, n, p_irtype);
 383                 ++n;
 384         }
 385
 386         bool is_variadic = function_type->variadic;
 387
 388         if (is_variadic)
 389                 set_method_variadicity(irtype, variadicity_variadic);
 390
 391         unsigned cc = get_method_calling_convention(irtype);
 392         switch (function_type->calling_convention) {
 393         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 394         case CC_CDECL:
 395 is_cdecl:
 396                 set_method_calling_convention(irtype, SET_CDECL(cc));
 397                 break;
 398
 399         case CC_STDCALL:
 400                 if (is_variadic)
 401                         goto is_cdecl;
 402
 403                 /* only non-variadic function can use stdcall, else use cdecl */
 404                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 405                 break;
 406
 407         case CC_FASTCALL:
 408                 if (is_variadic)
 409                         goto is_cdecl;
 410                 /* only non-variadic function can use fastcall, else use cdecl */
 411                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 412                 break;
 413
 414         case CC_THISCALL:
 415                 /* Hmm, leave default, not accepted by the parser yet. */
 416                 break;
 417         }
 418
 419         if (for_closure)
 420                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 421
 422         return irtype;
 423 }
 424
 425 static ir_type *create_pointer_type(pointer_type_t *type)
 426 {
 427         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 428         type_t        *points_to    = type->points_to;
 429         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 430         ir_type       *irtype       = new_d_type_pointer(ir_points_to, dbgi);
 431
 432         return irtype;
 433 }
 434
 435 static ir_type *create_reference_type(reference_type_t *type)
 436 {
 437         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 438         type_t        *refers_to    = type->refers_to;
 439         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 440         ir_type       *irtype       = new_d_type_pointer(ir_refers_to, dbgi);
 441
 442         return irtype;
 443 }
 444
 445 static ir_type *create_array_type(array_type_t *type)
 446 {
 447         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 448         type_t        *element_type    = type->element_type;
 449         ir_type       *ir_element_type = get_ir_type(element_type);
 450         ir_type       *irtype          = new_d_type_array(1, ir_element_type, dbgi);
 451
 452         const int align = get_type_alignment_bytes(ir_element_type);
 453         set_type_alignment_bytes(irtype, align);
 454
 455         if (type->size_constant) {
 456                 int n_elements = type->size;
 457
 458                 set_array_bounds_int(irtype, 0, 0, n_elements);
 459
 460                 size_t elemsize = get_type_size_bytes(ir_element_type);
 461                 if (elemsize % align > 0) {
 462                         elemsize += align - (elemsize % align);
 463                 }
 464                 set_type_size_bytes(irtype, n_elements * elemsize);
 465         } else {
 466                 set_array_lower_bound_int(irtype, 0, 0);
 467         }
 468         set_type_state(irtype, layout_fixed);
 469
 470         return irtype;
 471 }
 472
 473 /**
 474  * Return the signed integer type of size bits.
 475  *
 476  * @param size   the size
 477  */
 478 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 479                                                  unsigned size,
 480                                                                                                  const type_t *type)
 481 {
 482         static ir_mode *s_modes[64 + 1] = {NULL, };
 483         ir_type *res;
 484         ir_mode *mode;
 485
 486         if (size <= 0 || size > 64)
 487                 return NULL;
 488
 489         mode = s_modes[size];
 490         if (mode == NULL) {
 491                 char name[32];
 492
 493                 snprintf(name, sizeof(name), "bf_I%u", size);
 494                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 495                                    size <= 32 ? 32 : size );
 496                 s_modes[size] = mode;
 497         }
 498
 499         type_dbg_info *dbgi = get_type_dbg_info_(type);
 500         res                 = new_d_type_primitive(mode, dbgi);
 501         set_primitive_base_type(res, base_tp);
 502
 503         return res;
 504 }
 505
 506 /**
 507  * Return the unsigned integer type of size bits.
 508  *
 509  * @param size   the size
 510  */
 511 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 512                                                    unsigned size,
 513                                                                                                    const type_t *type)
 514 {
 515         static ir_mode *u_modes[64 + 1] = {NULL, };
 516         ir_type *res;
 517         ir_mode *mode;
 518
 519         if (size <= 0 || size > 64)
 520                 return NULL;
 521
 522         mode = u_modes[size];
 523         if (mode == NULL) {
 524                 char name[32];
 525
 526                 snprintf(name, sizeof(name), "bf_U%u", size);
 527                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 528                                    size <= 32 ? 32 : size );
 529                 u_modes[size] = mode;
 530         }
 531
 532         type_dbg_info *dbgi = get_type_dbg_info_(type);
 533         res = new_d_type_primitive(mode, dbgi);
 534         set_primitive_base_type(res, base_tp);
 535
 536         return res;
 537 }
 538
 539 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 540 {
 541         type_t *base = skip_typeref(type->base_type);
 542         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 543         ir_type *irbase = get_ir_type(base);
 544
 545         unsigned size = type->bit_size;
 546
 547         assert(!is_type_float(base));
 548         if (is_type_signed(base)) {
 549                 return get_signed_int_type_for_bit_size(irbase, size,
 550                                                         (const type_t*) type);
 551         } else {
 552                 return get_unsigned_int_type_for_bit_size(irbase, size,
 553                                                           (const type_t*) type);
 554         }
 555 }
 556
 557 #define INVALID_TYPE ((ir_type_ptr)-1)
 558
 559 enum {
 560         COMPOUND_IS_STRUCT = false,
 561         COMPOUND_IS_UNION  = true
 562 };
 563
 564 /**
 565  * Construct firm type from ast struct type.
 566  */
 567 static ir_type *create_compound_type(compound_type_t *type,
 568                                      bool incomplete, bool is_union)
 569 {
 570         compound_t *compound = type->compound;
 571
 572         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 573                 return compound->irtype;
 574         }
 575
 576         symbol_t *type_symbol = compound->base.symbol;
 577         ident    *id;
 578         if (type_symbol != NULL) {
 579                 id = new_id_from_str(type_symbol->string);
 580         } else {
 581                 if (is_union) {
 582                         id = id_unique("__anonymous_union.%u");
 583                 } else {
 584                         id = id_unique("__anonymous_struct.%u");
 585                 }
 586         }
 587
 588         ir_type *irtype;
 589         if (is_union) {
 590                 irtype = new_type_union(id);
 591         } else {
 592                 irtype = new_type_struct(id);
 593         }
 594
 595         compound->irtype_complete = false;
 596         compound->irtype          = irtype;
 597
 598         if (incomplete)
 599                 return irtype;
 600
 601         if (is_union) {
 602                 layout_union_type(type);
 603         } else {
 604                 layout_struct_type(type);
 605         }
 606
 607         compound->irtype_complete = true;
 608
 609         entity_t *entry = compound->members.entities;
 610         for ( ; entry != NULL; entry = entry->base.next) {
 611                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 612                         continue;
 613
 614                 symbol_t *symbol     = entry->base.symbol;
 615                 type_t   *entry_type = entry->declaration.type;
 616                 ident    *ident;
 617                 if (symbol == NULL) {
 618                         /* anonymous bitfield member, skip */
 619                         if (entry_type->kind == TYPE_BITFIELD)
 620                                 continue;
 621                         assert(entry_type->kind == TYPE_COMPOUND_STRUCT
 622                                         || entry_type->kind == TYPE_COMPOUND_UNION);
 623                         ident = id_unique("anon.%u");
 624                 } else {
 625                         ident = new_id_from_str(symbol->string);
 626                 }
 627
 628                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 629
 630                 ir_type   *entry_irtype = get_ir_type(entry_type);
 631                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 632
 633                 set_entity_offset(entity, entry->compound_member.offset);
 634                 set_entity_offset_bits_remainder(entity,
 635                                                  entry->compound_member.bit_offset);
 636
 637                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 638                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 639                 entry->compound_member.entity = entity;
 640         }
 641
 642         set_type_alignment_bytes(irtype, compound->alignment);
 643         set_type_size_bytes(irtype, compound->size);
 644         set_type_state(irtype, layout_fixed);
 645
 646         return irtype;
 647 }
 648
 649 static ir_type *create_enum_type(enum_type_t *const type)
 650 {
 651         type->base.firm_type = ir_type_int;
 652
 653         ir_mode   *const mode    = mode_int;
 654         ir_tarval *const one     = get_mode_one(mode);
 655         ir_tarval *      tv_next = get_mode_null(mode);
 656
 657         bool constant_folding_old = constant_folding;
 658         constant_folding = true;
 659
 660         enum_t   *enume = type->enume;
 661         entity_t *entry = enume->base.next;
 662         for (; entry != NULL; entry = entry->base.next) {
 663                 if (entry->kind != ENTITY_ENUM_VALUE)
 664                         break;
 665
 666                 expression_t *const init = entry->enum_value.value;
 667                 if (init != NULL) {
 668                         ir_node *const cnst = expression_to_firm(init);
 669                         if (!is_Const(cnst)) {
 670                                 panic("couldn't fold constant");
 671                         }
 672                         tv_next = get_Const_tarval(cnst);
 673                 }
 674                 entry->enum_value.tv = tv_next;
 675                 tv_next = tarval_add(tv_next, one);
 676         }
 677
 678         constant_folding = constant_folding_old;
 679
 680         return create_atomic_type(type->akind, (const type_t*) type);
 681 }
 682
 683 static ir_type *get_ir_type_incomplete(type_t *type)
 684 {
 685         assert(type != NULL);
 686         type = skip_typeref(type);
 687
 688         if (type->base.firm_type != NULL) {
 689                 assert(type->base.firm_type != INVALID_TYPE);
 690                 return type->base.firm_type;
 691         }
 692
 693         switch (type->kind) {
 694         case TYPE_COMPOUND_STRUCT:
 695                 return create_compound_type(&type->compound, true, COMPOUND_IS_STRUCT);
 696         case TYPE_COMPOUND_UNION:
 697                 return create_compound_type(&type->compound, true, COMPOUND_IS_UNION);
 698         default:
 699                 return get_ir_type(type);
 700         }
 701 }
 702
 703 ir_type *get_ir_type(type_t *type)
 704 {
 705         assert(type != NULL);
 706
 707         type = skip_typeref(type);
 708
 709         if (type->base.firm_type != NULL) {
 710                 assert(type->base.firm_type != INVALID_TYPE);
 711                 return type->base.firm_type;
 712         }
 713
 714         ir_type *firm_type = NULL;
 715         switch (type->kind) {
 716         case TYPE_ERROR:
 717                 /* Happens while constant folding, when there was an error */
 718                 return create_atomic_type(ATOMIC_TYPE_VOID, NULL);
 719
 720         case TYPE_ATOMIC:
 721                 firm_type = create_atomic_type(type->atomic.akind, type);
 722                 break;
 723         case TYPE_COMPLEX:
 724                 firm_type = create_complex_type(&type->complex);
 725                 break;
 726         case TYPE_IMAGINARY:
 727                 firm_type = create_imaginary_type(&type->imaginary);
 728                 break;
 729         case TYPE_FUNCTION:
 730                 firm_type = create_method_type(&type->function, false);
 731                 break;
 732         case TYPE_POINTER:
 733                 firm_type = create_pointer_type(&type->pointer);
 734                 break;
 735         case TYPE_REFERENCE:
 736                 firm_type = create_reference_type(&type->reference);
 737                 break;
 738         case TYPE_ARRAY:
 739                 firm_type = create_array_type(&type->array);
 740                 break;
 741         case TYPE_COMPOUND_STRUCT:
 742                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_STRUCT);
 743                 break;
 744         case TYPE_COMPOUND_UNION:
 745                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_UNION);
 746                 break;
 747         case TYPE_ENUM:
 748                 firm_type = create_enum_type(&type->enumt);
 749                 break;
 750         case TYPE_BITFIELD:
 751                 firm_type = create_bitfield_type(&type->bitfield);
 752                 break;
 753
 754         case TYPE_TYPEOF:
 755         case TYPE_TYPEDEF:
 756         case TYPE_INVALID:
 757                 break;
 758         }
 759         if (firm_type == NULL)
 760                 panic("unknown type found");
 761
 762         type->base.firm_type = firm_type;
 763         return firm_type;
 764 }
 765
 766 static ir_mode *get_ir_mode_storage(type_t *type)
 767 {
 768         ir_type *irtype = get_ir_type(type);
 769
 770         /* firm doesn't report a mode for arrays somehow... */
 771         if (is_Array_type(irtype)) {
 772                 return mode_P_data;
 773         }
 774
 775         ir_mode *mode = get_type_mode(irtype);
 776         assert(mode != NULL);
 777         return mode;
 778 }
 779
 780 /*
 781  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 782  * int that it returns bigger modes for floating point on some platforms
 783  * (x87 internally does arithemtic with 80bits)
 784  */
 785 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 786 {
 787         ir_mode *mode = get_ir_mode_storage(type);
 788         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 789                 return mode_float_arithmetic;
 790         }
 791
 792         return mode;
 793 }
 794
 795 /** Names of the runtime functions. */
 796 static const struct {
 797         int        id;           /**< the rts id */
 798         int        n_res;        /**< number of return values */
 799         const char *name;        /**< the name of the rts function */
 800         int        n_params;     /**< number of parameters */
 801         unsigned   flags;        /**< language flags */
 802 } rts_data[] = {
 803         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 804         { rts_abort,      0, "abort",        0, _C89 },
 805         { rts_alloca,     1, "alloca",       1, _ALL },
 806         { rts_abs,        1, "abs",          1, _C89 },
 807         { rts_labs,       1, "labs",         1, _C89 },
 808         { rts_llabs,      1, "llabs",        1, _C99 },
 809         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 810
 811         { rts_fabs,       1, "fabs",         1, _C89 },
 812         { rts_sqrt,       1, "sqrt",         1, _C89 },
 813         { rts_cbrt,       1, "cbrt",         1, _C99 },
 814         { rts_exp,        1, "exp",          1, _C89 },
 815         { rts_exp2,       1, "exp2",         1, _C89 },
 816         { rts_exp10,      1, "exp10",        1, _GNUC },
 817         { rts_log,        1, "log",          1, _C89 },
 818         { rts_log2,       1, "log2",         1, _C89 },
 819         { rts_log10,      1, "log10",        1, _C89 },
 820         { rts_pow,        1, "pow",          2, _C89 },
 821         { rts_sin,        1, "sin",          1, _C89 },
 822         { rts_cos,        1, "cos",          1, _C89 },
 823         { rts_tan,        1, "tan",          1, _C89 },
 824         { rts_asin,       1, "asin",         1, _C89 },
 825         { rts_acos,       1, "acos",         1, _C89 },
 826         { rts_atan,       1, "atan",         1, _C89 },
 827         { rts_sinh,       1, "sinh",         1, _C89 },
 828         { rts_cosh,       1, "cosh",         1, _C89 },
 829         { rts_tanh,       1, "tanh",         1, _C89 },
 830
 831         { rts_fabsf,      1, "fabsf",        1, _C99 },
 832         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 833         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 834         { rts_expf,       1, "expf",         1, _C99 },
 835         { rts_exp2f,      1, "exp2f",        1, _C99 },
 836         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 837         { rts_logf,       1, "logf",         1, _C99 },
 838         { rts_log2f,      1, "log2f",        1, _C99 },
 839         { rts_log10f,     1, "log10f",       1, _C99 },
 840         { rts_powf,       1, "powf",         2, _C99 },
 841         { rts_sinf,       1, "sinf",         1, _C99 },
 842         { rts_cosf,       1, "cosf",         1, _C99 },
 843         { rts_tanf,       1, "tanf",         1, _C99 },
 844         { rts_asinf,      1, "asinf",        1, _C99 },
 845         { rts_acosf,      1, "acosf",        1, _C99 },
 846         { rts_atanf,      1, "atanf",        1, _C99 },
 847         { rts_sinhf,      1, "sinhf",        1, _C99 },
 848         { rts_coshf,      1, "coshf",        1, _C99 },
 849         { rts_tanhf,      1, "tanhf",        1, _C99 },
 850
 851         { rts_fabsl,      1, "fabsl",        1, _C99 },
 852         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 853         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 854         { rts_expl,       1, "expl",         1, _C99 },
 855         { rts_exp2l,      1, "exp2l",        1, _C99 },
 856         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 857         { rts_logl,       1, "logl",         1, _C99 },
 858         { rts_log2l,      1, "log2l",        1, _C99 },
 859         { rts_log10l,     1, "log10l",       1, _C99 },
 860         { rts_powl,       1, "powl",         2, _C99 },
 861         { rts_sinl,       1, "sinl",         1, _C99 },
 862         { rts_cosl,       1, "cosl",         1, _C99 },
 863         { rts_tanl,       1, "tanl",         1, _C99 },
 864         { rts_asinl,      1, "asinl",        1, _C99 },
 865         { rts_acosl,      1, "acosl",        1, _C99 },
 866         { rts_atanl,      1, "atanl",        1, _C99 },
 867         { rts_sinhl,      1, "sinhl",        1, _C99 },
 868         { rts_coshl,      1, "coshl",        1, _C99 },
 869         { rts_tanhl,      1, "tanhl",        1, _C99 },
 870
 871         { rts_strcmp,     1, "strcmp",       2, _C89 },
 872         { rts_strncmp,    1, "strncmp",      3, _C89 },
 873         { rts_strcpy,     1, "strcpy",       2, _C89 },
 874         { rts_strlen,     1, "strlen",       1, _C89 },
 875         { rts_memcpy,     1, "memcpy",       3, _C89 },
 876         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 877         { rts_memmove,    1, "memmove",      3, _C89 },
 878         { rts_memset,     1, "memset",       3, _C89 },
 879         { rts_memcmp,     1, "memcmp",       3, _C89 },
 880 };
 881
 882 static ident *rts_idents[lengthof(rts_data)];
 883
 884 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 885
 886 void set_create_ld_ident(ident *(*func)(entity_t*))
 887 {
 888         create_ld_ident = func;
 889 }
 890
 891 /**
 892  * Handle GNU attributes for entities
 893  *
 894  * @param ent   the entity
 895  * @param decl  the routine declaration
 896  */
 897 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 898 {
 899         assert(is_declaration(entity));
 900         decl_modifiers_t modifiers = entity->declaration.modifiers;
 901
 902         if (is_method_entity(irentity)) {
 903                 if (modifiers & DM_PURE) {
 904                         set_entity_additional_properties(irentity, mtp_property_pure);
 905                 }
 906                 if (modifiers & DM_CONST) {
 907                         add_entity_additional_properties(irentity, mtp_property_const);
 908                 }
 909         }
 910         if (modifiers & DM_USED) {
 911                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 912         }
 913         if (modifiers & DM_WEAK) {
 914                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 915         }
 916 }
 917
 918 static bool is_main(entity_t *entity)
 919 {
 920         static symbol_t *sym_main = NULL;
 921         if (sym_main == NULL) {
 922                 sym_main = symbol_table_insert("main");
 923         }
 924
 925         if (entity->base.symbol != sym_main)
 926                 return false;
 927         /* must be in outermost scope */
 928         if (entity->base.parent_scope != &current_translation_unit->scope)
 929                 return false;
 930
 931         return true;
 932 }
 933
 934 /**
 935  * Creates an entity representing a function.
 936  *
 937  * @param entity       the function declaration/definition
 938  * @param owner_type   the owner type of this function, NULL
 939  *                     for global functions
 940  */
 941 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 942 {
 943         assert(entity->kind == ENTITY_FUNCTION);
 944         if (entity->function.irentity != NULL) {
 945                 return entity->function.irentity;
 946         }
 947
 948         entity_t *original_entity = entity;
 949         if (entity->function.btk != bk_none) {
 950                 entity = get_builtin_replacement(entity);
 951                 if (entity == NULL)
 952                         return NULL;
 953         }
 954
 955         if (is_main(entity)) {
 956                 /* force main to C linkage */
 957                 type_t *type = entity->declaration.type;
 958                 assert(is_type_function(type));
 959                 if (type->function.linkage != LINKAGE_C) {
 960                         type_t *new_type           = duplicate_type(type);
 961                         new_type->function.linkage = LINKAGE_C;
 962                         type                       = identify_new_type(new_type);
 963                         entity->declaration.type   = type;
 964                 }
 965         }
 966
 967         symbol_t *symbol = entity->base.symbol;
 968         ident    *id     = new_id_from_str(symbol->string);
 969
 970         /* already an entity defined? */
 971         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 972         bool const has_body = entity->function.statement != NULL;
 973         if (irentity != NULL) {
 974                 if (get_entity_visibility(irentity) == ir_visibility_external
 975                                 && has_body) {
 976                         set_entity_visibility(irentity, ir_visibility_default);
 977                 }
 978                 goto entity_created;
 979         }
 980
 981         ir_type *ir_type_method;
 982         if (entity->function.need_closure)
 983                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 984         else
 985                 ir_type_method = get_ir_type(entity->declaration.type);
 986
 987         bool nested_function = false;
 988         if (owner_type == NULL)
 989                 owner_type = get_glob_type();
 990         else
 991                 nested_function = true;
 992
 993         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 994         irentity             = new_d_entity(owner_type, id, ir_type_method, dbgi);
 995
 996         ident *ld_id;
 997         if (nested_function)
 998                 ld_id = id_unique("inner.%u");
 999         else
1000                 ld_id = create_ld_ident(entity);
1001         set_entity_ld_ident(irentity, ld_id);
1002
1003         handle_decl_modifiers(irentity, entity);
1004
1005         if (! nested_function) {
1006                 /* static inline             => local
1007                  * extern inline             => local
1008                  * inline without definition => local
1009                  * inline with definition    => external_visible */
1010                 storage_class_tag_t const storage_class
1011                         = (storage_class_tag_t) entity->declaration.storage_class;
1012                 bool                const is_inline     = entity->function.is_inline;
1013
1014                 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1015                     set_entity_visibility(irentity, ir_visibility_default);
1016                 } else if (storage_class == STORAGE_CLASS_STATIC ||
1017                            (is_inline && has_body)) {
1018                     set_entity_visibility(irentity, ir_visibility_local);
1019                 } else if (has_body) {
1020                     set_entity_visibility(irentity, ir_visibility_default);
1021                 } else {
1022                     set_entity_visibility(irentity, ir_visibility_external);
1023                 }
1024         } else {
1025                 /* nested functions are always local */
1026                 set_entity_visibility(irentity, ir_visibility_local);
1027         }
1028
1029         /* We should check for file scope here, but as long as we compile C only
1030            this is not needed. */
1031         if (!freestanding && !has_body) {
1032                 /* check for a known runtime function */
1033                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1034                         if (id != rts_idents[i])
1035                                 continue;
1036
1037                         function_type_t *function_type
1038                                 = &entity->declaration.type->function;
1039                         /* rts_entities code can't handle a "wrong" number of parameters */
1040                         if (function_type->unspecified_parameters)
1041                                 continue;
1042
1043                         /* check number of parameters */
1044                         int n_params = count_parameters(function_type);
1045                         if (n_params != rts_data[i].n_params)
1046                                 continue;
1047
1048                         type_t *return_type = skip_typeref(function_type->return_type);
1049                         int     n_res       = return_type != type_void ? 1 : 0;
1050                         if (n_res != rts_data[i].n_res)
1051                                 continue;
1052
1053                         /* ignore those rts functions not necessary needed for current mode */
1054                         if ((c_mode & rts_data[i].flags) == 0)
1055                                 continue;
1056                         assert(rts_entities[rts_data[i].id] == NULL);
1057                         rts_entities[rts_data[i].id] = irentity;
1058                 }
1059         }
1060
1061         entitymap_insert(&entitymap, symbol, irentity);
1062
1063 entity_created:
1064         original_entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1065         original_entity->function.irentity = irentity;
1066
1067         return irentity;
1068 }
1069
1070 /**
1071  * Creates a SymConst for a given entity.
1072  *
1073  * @param dbgi    debug info
1074  * @param entity  the entity
1075  */
1076 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
1077 {
1078         assert(entity != NULL);
1079         union symconst_symbol sym;
1080         sym.entity_p = entity;
1081         return new_d_SymConst(dbgi, mode_P, sym, symconst_addr_ent);
1082 }
1083
1084 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1085 {
1086         ir_mode *value_mode = get_irn_mode(value);
1087
1088         if (value_mode == dest_mode)
1089                 return value;
1090
1091         if (dest_mode == mode_b) {
1092                 ir_node *zero = new_Const(get_mode_null(value_mode));
1093                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero, ir_relation_less_greater);
1094                 return cmp;
1095         }
1096
1097         return new_d_Conv(dbgi, value, dest_mode);
1098 }
1099
1100 static ir_node *create_Const_from_bool(ir_mode *const mode, bool const v)
1101 {
1102         return new_Const((v ? get_mode_one : get_mode_null)(mode));
1103 }
1104
1105 /**
1106  * Creates a SymConst node representing a wide string literal.
1107  *
1108  * @param literal   the wide string literal
1109  */
1110 static ir_node *wide_string_literal_to_firm(
1111                 const string_literal_expression_t *literal)
1112 {
1113         ir_type  *const global_type = get_glob_type();
1114         ir_type  *const elem_type   = ir_type_wchar_t;
1115         dbg_info *const dbgi        = get_dbg_info(&literal->base.source_position);
1116         ir_type  *const type        = new_type_array(1, elem_type);
1117
1118         ident     *const id     = id_unique("str.%u");
1119         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1120         set_entity_ld_ident(entity, id);
1121         set_entity_visibility(entity, ir_visibility_private);
1122         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1123
1124         ir_mode      *const mode = get_type_mode(elem_type);
1125         const size_t        slen = wstrlen(&literal->value);
1126
1127         set_array_lower_bound_int(type, 0, 0);
1128         set_array_upper_bound_int(type, 0, slen);
1129         set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1130         set_type_state(type, layout_fixed);
1131
1132         ir_initializer_t *initializer = create_initializer_compound(slen);
1133         const char              *p    = literal->value.begin;
1134         for (size_t i = 0; i < slen; ++i) {
1135                 assert(p < literal->value.begin + literal->value.size);
1136                 utf32             v   = read_utf8_char(&p);
1137                 ir_tarval        *tv  = new_tarval_from_long(v, mode);
1138                 ir_initializer_t *val = create_initializer_tarval(tv);
1139                 set_initializer_compound_value(initializer, i, val);
1140         }
1141         set_entity_initializer(entity, initializer);
1142
1143         return create_symconst(dbgi, entity);
1144 }
1145
1146 /**
1147  * Creates a SymConst node representing a string constant.
1148  *
1149  * @param src_pos    the source position of the string constant
1150  * @param id_prefix  a prefix for the name of the generated string constant
1151  * @param value      the value of the string constant
1152  */
1153 static ir_node *string_to_firm(const source_position_t *const src_pos,
1154                                const char *const id_prefix,
1155                                const string_t *const value)
1156 {
1157         ir_type  *const global_type = get_glob_type();
1158         dbg_info *const dbgi        = get_dbg_info(src_pos);
1159         ir_type  *const type        = new_type_array(1, ir_type_const_char);
1160
1161         ident     *const id     = id_unique(id_prefix);
1162         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1163         set_entity_ld_ident(entity, id);
1164         set_entity_visibility(entity, ir_visibility_private);
1165         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1166
1167         ir_type *const elem_type = ir_type_const_char;
1168         ir_mode *const mode      = get_type_mode(elem_type);
1169
1170         const char* const string = value->begin;
1171         const size_t      slen   = value->size;
1172
1173         set_array_lower_bound_int(type, 0, 0);
1174         set_array_upper_bound_int(type, 0, slen);
1175         set_type_size_bytes(type, slen);
1176         set_type_state(type, layout_fixed);
1177
1178         ir_initializer_t *initializer = create_initializer_compound(slen);
1179         for (size_t i = 0; i < slen; ++i) {
1180                 ir_tarval        *tv  = new_tarval_from_long(string[i], mode);
1181                 ir_initializer_t *val = create_initializer_tarval(tv);
1182                 set_initializer_compound_value(initializer, i, val);
1183         }
1184         set_entity_initializer(entity, initializer);
1185
1186         return create_symconst(dbgi, entity);
1187 }
1188
1189 static bool try_create_integer(literal_expression_t *literal,
1190                                type_t *type, unsigned char base)
1191 {
1192         const char *string = literal->value.begin;
1193         size_t      size   = literal->value.size;
1194
1195         assert(type->kind == TYPE_ATOMIC);
1196         atomic_type_kind_t akind = type->atomic.akind;
1197
1198         ir_mode   *mode = atomic_modes[akind];
1199         ir_tarval *tv   = new_integer_tarval_from_str(string, size, 1, base, mode);
1200         if (tv == tarval_bad)
1201                 return false;
1202
1203         literal->base.type    = type;
1204         literal->target_value = tv;
1205         return true;
1206 }
1207
1208 static void create_integer_tarval(literal_expression_t *literal)
1209 {
1210         unsigned  us     = 0;
1211         unsigned  ls     = 0;
1212         symbol_t *suffix = literal->suffix;
1213         /* parse suffix */
1214         if (suffix != NULL) {
1215                 for (const char *c = suffix->string; *c != '\0'; ++c) {
1216                         if (*c == 'u' || *c == 'U') { ++us; }
1217                         if (*c == 'l' || *c == 'L') { ++ls; }
1218                 }
1219         }
1220
1221         unsigned base;
1222         switch (literal->base.kind) {
1223                 case EXPR_LITERAL_INTEGER_OCTAL:       base =  8; break;
1224                 case EXPR_LITERAL_INTEGER:             base = 10; break;
1225                 case EXPR_LITERAL_INTEGER_HEXADECIMAL: base = 16; break;
1226                 default: panic("invalid literal kind");
1227         }
1228
1229         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1230
1231         /* now try if the constant is small enough for some types */
1232         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1233         if (ls < 1) {
1234                 if (us == 0 && try_create_integer(literal, type_int, base))
1235                         goto finished;
1236                 if ((us == 1 || base != 10)
1237                                 && try_create_integer(literal, type_unsigned_int, base))
1238                         goto finished;
1239         }
1240         if (ls < 2) {
1241                 if (us == 0 && try_create_integer(literal, type_long, base))
1242                         goto finished;
1243                 if ((us == 1 || base != 10)
1244                                 && try_create_integer(literal, type_unsigned_long, base))
1245                         goto finished;
1246         }
1247         /* last try? then we should not report tarval_bad */
1248         if (us != 1 && base == 10)
1249                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1250         if (us == 0 && try_create_integer(literal, type_long_long, base))
1251                 goto finished;
1252
1253         /* last try */
1254         assert(us == 1 || base != 10);
1255         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1256         bool res = try_create_integer(literal, type_unsigned_long_long, base);
1257         if (!res)
1258                 panic("internal error when parsing number literal");
1259
1260 finished:
1261         tarval_set_integer_overflow_mode(old_mode);
1262 }
1263
1264 void determine_literal_type(literal_expression_t *literal)
1265 {
1266         switch (literal->base.kind) {
1267         case EXPR_LITERAL_INTEGER:
1268         case EXPR_LITERAL_INTEGER_OCTAL:
1269         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1270                 create_integer_tarval(literal);
1271                 return;
1272         default:
1273                 break;
1274         }
1275 }
1276
1277 /**
1278  * Creates a Const node representing a constant.
1279  */
1280 static ir_node *literal_to_firm(const literal_expression_t *literal)
1281 {
1282         type_t     *type   = skip_typeref(literal->base.type);
1283         ir_mode    *mode   = get_ir_mode_storage(type);
1284         const char *string = literal->value.begin;
1285         size_t      size   = literal->value.size;
1286         ir_tarval  *tv;
1287
1288         switch (literal->base.kind) {
1289         case EXPR_LITERAL_WIDE_CHARACTER: {
1290                 utf32  v = read_utf8_char(&string);
1291                 char   buf[128];
1292                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1293
1294                 tv = new_tarval_from_str(buf, len, mode);
1295                 goto make_const;
1296         }
1297         case EXPR_LITERAL_CHARACTER: {
1298                 long long int v;
1299                 if (size == 1 && char_is_signed) {
1300                         v = (signed char)string[0];
1301                 } else {
1302                         v = 0;
1303                         for (size_t i = 0; i < size; ++i) {
1304                                 v = (v << 8) | ((unsigned char)string[i]);
1305                         }
1306                 }
1307                 char   buf[128];
1308                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1309
1310                 tv = new_tarval_from_str(buf, len, mode);
1311                 goto make_const;
1312         }
1313         case EXPR_LITERAL_INTEGER:
1314         case EXPR_LITERAL_INTEGER_OCTAL:
1315         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1316                 assert(literal->target_value != NULL);
1317                 tv = literal->target_value;
1318                 goto make_const;
1319         case EXPR_LITERAL_FLOATINGPOINT:
1320                 tv = new_tarval_from_str(string, size, mode);
1321                 goto make_const;
1322         case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: {
1323                 char buffer[size + 2];
1324                 memcpy(buffer, "0x", 2);
1325                 memcpy(buffer+2, string, size);
1326                 tv = new_tarval_from_str(buffer, size+2, mode);
1327                 goto make_const;
1328         }
1329         case EXPR_LITERAL_BOOLEAN:
1330                 if (string[0] == 't') {
1331                         tv = get_mode_one(mode);
1332                 } else {
1333                         assert(string[0] == 'f');
1334                         tv = get_mode_null(mode);
1335                 }
1336                 goto make_const;
1337         case EXPR_LITERAL_MS_NOOP:
1338                 tv = get_mode_null(mode);
1339                 goto make_const;
1340         default:
1341                 break;
1342         }
1343         panic("Invalid literal kind found");
1344
1345 make_const: ;
1346         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1347         ir_node  *res        = new_d_Const(dbgi, tv);
1348         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1349         return create_conv(dbgi, res, mode_arith);
1350 }
1351
1352 /*
1353  * Allocate an area of size bytes aligned at alignment
1354  * at a frame type.
1355  */
1356 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1357 {
1358         static unsigned area_cnt = 0;
1359         char buf[32];
1360
1361         ir_type *tp = new_type_array(1, ir_type_char);
1362         set_array_bounds_int(tp, 0, 0, size);
1363         set_type_alignment_bytes(tp, alignment);
1364
1365         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1366         ident *name = new_id_from_str(buf);
1367         ir_entity *area = new_entity(frame_type, name, tp);
1368
1369         /* mark this entity as compiler generated */
1370         set_entity_compiler_generated(area, 1);
1371         return area;
1372 }
1373
1374 /**
1375  * Return a node representing a trampoline region
1376  * for a given function entity.
1377  *
1378  * @param dbgi    debug info
1379  * @param entity  the function entity
1380  */
1381 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1382 {
1383         ir_entity *region = NULL;
1384         int        i;
1385
1386         if (current_trampolines != NULL) {
1387                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1388                         if (current_trampolines[i].function == entity) {
1389                                 region = current_trampolines[i].region;
1390                                 break;
1391                         }
1392                 }
1393         } else {
1394                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1395         }
1396         ir_graph *irg = current_ir_graph;
1397         if (region == NULL) {
1398                 /* create a new region */
1399                 ir_type           *frame_tp = get_irg_frame_type(irg);
1400                 trampoline_region  reg;
1401                 reg.function = entity;
1402
1403                 reg.region   = alloc_trampoline(frame_tp,
1404                                                 be_params->trampoline_size,
1405                                                 be_params->trampoline_align);
1406                 ARR_APP1(trampoline_region, current_trampolines, reg);
1407                 region = reg.region;
1408         }
1409         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1410                                region);
1411 }
1412
1413 /**
1414  * Creates a trampoline for a function represented by an entity.
1415  *
1416  * @param dbgi    debug info
1417  * @param mode    the (reference) mode for the function address
1418  * @param entity  the function entity
1419  */
1420 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1421                                   ir_entity *entity)
1422 {
1423         assert(entity != NULL);
1424         ir_node *in[3];
1425         in[0] = get_trampoline_region(dbgi, entity);
1426         in[1] = create_symconst(dbgi, entity);
1427         in[2] = get_irg_frame(current_ir_graph);
1428
1429         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1430         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1431         return new_Proj(irn, mode, pn_Builtin_1_result);
1432 }
1433
1434 /**
1435  * Dereference an address.
1436  *
1437  * @param dbgi  debug info
1438  * @param type  the type of the dereferenced result (the points_to type)
1439  * @param addr  the address to dereference
1440  */
1441 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1442                                       ir_node *const addr)
1443 {
1444         ir_type *irtype = get_ir_type(type);
1445         if (is_compound_type(irtype)
1446                         || is_Method_type(irtype)
1447                         || is_Array_type(irtype)) {
1448                 return addr;
1449         }
1450
1451         ir_cons_flags  flags    = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1452                                   ? cons_volatile : cons_none;
1453         ir_mode *const mode     = get_type_mode(irtype);
1454         ir_node *const memory   = get_store();
1455         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1456         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1457         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1458
1459         set_store(load_mem);
1460
1461         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1462         return create_conv(dbgi, load_res, mode_arithmetic);
1463 }
1464
1465 /**
1466  * Creates a strict Conv (to the node's mode) if necessary.
1467  *
1468  * @param dbgi  debug info
1469  * @param node  the node to strict conv
1470  */
1471 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1472 {
1473         ir_mode *mode = get_irn_mode(node);
1474
1475         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1476                 return node;
1477         if (!mode_is_float(mode))
1478                 return node;
1479
1480         /* check if there is already a Conv */
1481         if (is_Conv(node)) {
1482                 /* convert it into a strict Conv */
1483                 set_Conv_strict(node, 1);
1484                 return node;
1485         }
1486
1487         /* otherwise create a new one */
1488         return new_d_strictConv(dbgi, node, mode);
1489 }
1490
1491 /**
1492  * Returns the correct base address depending on whether it is a parameter or a
1493  * normal local variable.
1494  */
1495 static ir_node *get_local_frame(ir_entity *const ent)
1496 {
1497         ir_graph      *const irg   = current_ir_graph;
1498         const ir_type *const owner = get_entity_owner(ent);
1499         if (owner == current_outer_frame) {
1500                 assert(current_static_link != NULL);
1501                 return current_static_link;
1502         } else {
1503                 return get_irg_frame(irg);
1504         }
1505 }
1506
1507 /**
1508  * Keep all memory edges of the given block.
1509  */
1510 static void keep_all_memory(ir_node *block)
1511 {
1512         ir_node *old = get_cur_block();
1513
1514         set_cur_block(block);
1515         keep_alive(get_store());
1516         /* TODO: keep all memory edges from restricted pointers */
1517         set_cur_block(old);
1518 }
1519
1520 static ir_node *reference_expression_enum_value_to_firm(
1521                 const reference_expression_t *ref)
1522 {
1523         entity_t *entity = ref->entity;
1524         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1525         /* make sure the type is constructed */
1526         (void) get_ir_type(type);
1527
1528         return new_Const(entity->enum_value.tv);
1529 }
1530
1531 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1532 {
1533         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1534         entity_t *entity = ref->entity;
1535         assert(is_declaration(entity));
1536         type_t   *type   = skip_typeref(entity->declaration.type);
1537
1538         /* make sure the type is constructed */
1539         (void) get_ir_type(type);
1540
1541         if (entity->kind == ENTITY_FUNCTION && entity->function.btk != bk_none) {
1542                 ir_entity *irentity = get_function_entity(entity, NULL);
1543                 /* for gcc compatibility we have to produce (dummy) addresses for some
1544                  * builtins which don't have entities */
1545                 if (irentity == NULL) {
1546                         source_position_t const *const pos = &ref->base.source_position;
1547                         symbol_t          const *const sym = ref->entity->base.symbol;
1548                         warningf(WARN_OTHER, pos, "taking address of builtin '%Y'", sym);
1549
1550                         /* simply create a NULL pointer */
1551                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1552                         ir_node  *res  = new_Const(get_mode_null(mode));
1553
1554                         return res;
1555                 }
1556         }
1557
1558         switch ((declaration_kind_t) entity->declaration.kind) {
1559         case DECLARATION_KIND_UNKNOWN:
1560                 break;
1561
1562         case DECLARATION_KIND_LOCAL_VARIABLE: {
1563                 ir_mode *const mode  = get_ir_mode_storage(type);
1564                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1565                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1566         }
1567         case DECLARATION_KIND_PARAMETER: {
1568                 ir_mode *const mode  = get_ir_mode_storage(type);
1569                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1570                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1571         }
1572         case DECLARATION_KIND_FUNCTION: {
1573                 return create_symconst(dbgi, entity->function.irentity);
1574         }
1575         case DECLARATION_KIND_INNER_FUNCTION: {
1576                 ir_mode *const mode = get_ir_mode_storage(type);
1577                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1578                         /* inner function not using the closure */
1579                         return create_symconst(dbgi, entity->function.irentity);
1580                 } else {
1581                         /* need trampoline here */
1582                         return create_trampoline(dbgi, mode, entity->function.irentity);
1583                 }
1584         }
1585         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1586                 const variable_t *variable = &entity->variable;
1587                 ir_node *const addr = create_symconst(dbgi, variable->v.entity);
1588                 return deref_address(dbgi, variable->base.type, addr);
1589         }
1590
1591         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1592                 ir_entity *irentity = entity->variable.v.entity;
1593                 ir_node   *frame    = get_local_frame(irentity);
1594                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1595                 return deref_address(dbgi, entity->declaration.type, sel);
1596         }
1597         case DECLARATION_KIND_PARAMETER_ENTITY: {
1598                 ir_entity *irentity = entity->parameter.v.entity;
1599                 ir_node   *frame    = get_local_frame(irentity);
1600                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1601                 return deref_address(dbgi, entity->declaration.type, sel);
1602         }
1603
1604         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1605                 return entity->variable.v.vla_base;
1606
1607         case DECLARATION_KIND_COMPOUND_MEMBER:
1608                 panic("not implemented reference type");
1609         }
1610
1611         panic("reference to declaration with unknown type found");
1612 }
1613
1614 static ir_node *reference_addr(const reference_expression_t *ref)
1615 {
1616         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1617         entity_t *entity = ref->entity;
1618         assert(is_declaration(entity));
1619
1620         switch((declaration_kind_t) entity->declaration.kind) {
1621         case DECLARATION_KIND_UNKNOWN:
1622                 break;
1623         case DECLARATION_KIND_PARAMETER:
1624         case DECLARATION_KIND_LOCAL_VARIABLE:
1625                 /* you can store to a local variable (so we don't panic but return NULL
1626                  * as an indicator for no real address) */
1627                 return NULL;
1628         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1629                 ir_node *const addr = create_symconst(dbgi, entity->variable.v.entity);
1630                 return addr;
1631         }
1632         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1633                 ir_entity *irentity = entity->variable.v.entity;
1634                 ir_node   *frame    = get_local_frame(irentity);
1635                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1636
1637                 return sel;
1638         }
1639         case DECLARATION_KIND_PARAMETER_ENTITY: {
1640                 ir_entity *irentity = entity->parameter.v.entity;
1641                 ir_node   *frame    = get_local_frame(irentity);
1642                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1643
1644                 return sel;
1645         }
1646
1647         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1648                 return entity->variable.v.vla_base;
1649
1650         case DECLARATION_KIND_FUNCTION: {
1651                 return create_symconst(dbgi, entity->function.irentity);
1652         }
1653
1654         case DECLARATION_KIND_INNER_FUNCTION: {
1655                 type_t  *const type = skip_typeref(entity->declaration.type);
1656                 ir_mode *const mode = get_ir_mode_storage(type);
1657                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1658                         /* inner function not using the closure */
1659                         return create_symconst(dbgi, entity->function.irentity);
1660                 } else {
1661                         /* need trampoline here */
1662                         return create_trampoline(dbgi, mode, entity->function.irentity);
1663                 }
1664         }
1665
1666         case DECLARATION_KIND_COMPOUND_MEMBER:
1667                 panic("not implemented reference type");
1668         }
1669
1670         panic("reference to declaration with unknown type found");
1671 }
1672
1673 /**
1674  * Generate an unary builtin.
1675  *
1676  * @param kind           the builtin kind to generate
1677  * @param op             the operand
1678  * @param function_type  the function type for the GNU builtin routine
1679  * @param db             debug info
1680  */
1681 static ir_node *gen_unary_builtin(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1682 {
1683         ir_node *in[1];
1684         in[0] = expression_to_firm(op);
1685
1686         ir_type *tp  = get_ir_type(function_type);
1687         ir_type *res = get_method_res_type(tp, 0);
1688         ir_node *irn = new_d_Builtin(db, get_irg_no_mem(current_ir_graph), 1, in, kind, tp);
1689         set_irn_pinned(irn, op_pin_state_floats);
1690         return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1691 }
1692
1693 /**
1694  * Generate a pinned unary builtin.
1695  *
1696  * @param kind           the builtin kind to generate
1697  * @param op             the operand
1698  * @param function_type  the function type for the GNU builtin routine
1699  * @param db             debug info
1700  */
1701 static ir_node *gen_unary_builtin_pinned(ir_builtin_kind kind, expression_t *op,
1702                                          type_t *function_type, dbg_info *db)
1703 {
1704         ir_node *in[1];
1705         in[0] = expression_to_firm(op);
1706
1707         ir_type *tp  = get_ir_type(function_type);
1708         ir_type *res = get_method_res_type(tp, 0);
1709         ir_node *mem = get_store();
1710         ir_node *irn = new_d_Builtin(db, mem, 1, in, kind, tp);
1711         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1712         return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1713 }
1714
1715 /**
1716  * Generate an binary-void-return builtin.
1717  *
1718  * @param kind           the builtin kind to generate
1719  * @param op1            the first operand
1720  * @param op2            the second operand
1721  * @param function_type  the function type for the GNU builtin routine
1722  * @param db             debug info
1723  */
1724 static ir_node *gen_binary_builtin_mem(ir_builtin_kind kind, expression_t *op1,
1725                                        expression_t *op2, type_t *function_type,
1726                                                                            dbg_info *db)
1727 {
1728         ir_node *in[2];
1729         in[0] = expression_to_firm(op1);
1730         in[1] = expression_to_firm(op2);
1731
1732         ir_type *tp  = get_ir_type(function_type);
1733         ir_node *mem = get_store();
1734         ir_node *irn = new_d_Builtin(db, mem, 2, in, kind, tp);
1735         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1736         return NULL;
1737 }
1738
1739 /**
1740  * Transform calls to builtin functions.
1741  */
1742 static ir_node *process_builtin_call(const call_expression_t *call)
1743 {
1744         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1745
1746         assert(call->function->kind == EXPR_REFERENCE);
1747         reference_expression_t *builtin = &call->function->reference;
1748
1749         type_t *expr_type = skip_typeref(builtin->base.type);
1750         assert(is_type_pointer(expr_type));
1751
1752         type_t *function_type = skip_typeref(expr_type->pointer.points_to);
1753
1754         switch (builtin->entity->function.btk) {
1755         case bk_gnu_builtin_alloca: {
1756                 if (call->arguments == NULL || call->arguments->next != NULL) {
1757                         panic("invalid number of parameters on __builtin_alloca");
1758                 }
1759                 expression_t *argument = call->arguments->expression;
1760                 ir_node      *size     = expression_to_firm(argument);
1761
1762                 ir_node *store  = get_store();
1763                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1764                                               stack_alloc);
1765                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1766                 set_store(proj_m);
1767                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1768
1769                 return res;
1770         }
1771
1772         case bk_gnu_builtin_huge_val:
1773         case bk_gnu_builtin_huge_valf:
1774         case bk_gnu_builtin_huge_vall:
1775         case bk_gnu_builtin_inf:
1776         case bk_gnu_builtin_inff:
1777         case bk_gnu_builtin_infl: {
1778                 type_t    *type = function_type->function.return_type;
1779                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1780                 ir_tarval *tv   = get_mode_infinite(mode);
1781                 ir_node   *res  = new_d_Const(dbgi, tv);
1782                 return res;
1783         }
1784         case bk_gnu_builtin_nan:
1785         case bk_gnu_builtin_nanf:
1786         case bk_gnu_builtin_nanl: {
1787                 /* Ignore string for now... */
1788                 assert(is_type_function(function_type));
1789                 type_t    *type = function_type->function.return_type;
1790                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1791                 ir_tarval *tv   = get_mode_NAN(mode);
1792                 ir_node   *res  = new_d_Const(dbgi, tv);
1793                 return res;
1794         }
1795         case bk_gnu_builtin_expect: {
1796                 expression_t *argument = call->arguments->expression;
1797                 return _expression_to_firm(argument);
1798         }
1799         case bk_gnu_builtin_va_end:
1800                 /* evaluate the argument of va_end for its side effects */
1801                 _expression_to_firm(call->arguments->expression);
1802                 return NULL;
1803         case bk_gnu_builtin_frame_address: {
1804                 expression_t *const expression = call->arguments->expression;
1805                 bool val = fold_constant_to_bool(expression);
1806                 if (!val) {
1807                         /* the nice case */
1808                         return get_irg_frame(current_ir_graph);
1809                 } else {
1810                         /* get the argument */
1811                         ir_node *in[2];
1812
1813                         in[0] = expression_to_firm(expression);
1814                         in[1] = get_irg_frame(current_ir_graph);
1815                         ir_type *tp  = get_ir_type(function_type);
1816                         ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_frame_address, tp);
1817                         return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1818                 }
1819         }
1820         case bk_gnu_builtin_return_address: {
1821                 expression_t *const expression = call->arguments->expression;
1822                 ir_node *in[2];
1823
1824                 in[0] = expression_to_firm(expression);
1825                 in[1] = get_irg_frame(current_ir_graph);
1826                 ir_type *tp  = get_ir_type(function_type);
1827                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_return_address, tp);
1828                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1829         }
1830         case bk_gnu_builtin_ffs:
1831                  return gen_unary_builtin(ir_bk_ffs,      call->arguments->expression, function_type, dbgi);
1832         case bk_gnu_builtin_clz:
1833                  return gen_unary_builtin(ir_bk_clz,      call->arguments->expression, function_type, dbgi);
1834         case bk_gnu_builtin_ctz:
1835                  return gen_unary_builtin(ir_bk_ctz,      call->arguments->expression, function_type, dbgi);
1836         case bk_gnu_builtin_popcount:
1837         case bk_ms__popcount:
1838                  return gen_unary_builtin(ir_bk_popcount, call->arguments->expression, function_type, dbgi);
1839         case bk_gnu_builtin_parity:
1840                  return gen_unary_builtin(ir_bk_parity,   call->arguments->expression, function_type, dbgi);
1841         case bk_gnu_builtin_prefetch: {
1842                 call_argument_t *const args = call->arguments;
1843                 expression_t *const addr    = args->expression;
1844                 ir_node *in[3];
1845
1846                 in[0] = _expression_to_firm(addr);
1847                 if (args->next != NULL) {
1848                         expression_t *const rw = args->next->expression;
1849
1850                         in[1] = _expression_to_firm(rw);
1851
1852                         if (args->next->next != NULL) {
1853                                 expression_t *const locality = args->next->next->expression;
1854
1855                                 in[2] = expression_to_firm(locality);
1856                         } else {
1857                                 in[2] = new_Const_long(mode_int, 3);
1858                         }
1859                 } else {
1860                         in[1] = new_Const_long(mode_int, 0);
1861                         in[2] = new_Const_long(mode_int, 3);
1862                 }
1863                 ir_type *tp  = get_ir_type(function_type);
1864                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_prefetch, tp);
1865                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1866                 return NULL;
1867         }
1868         case bk_gnu_builtin_object_size: {
1869                 /* determine value of "type" */
1870                 expression_t *type_expression = call->arguments->next->expression;
1871                 long          type_val        = fold_constant_to_int(type_expression);
1872                 type_t       *type            = function_type->function.return_type;
1873                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1874                 /* just produce a "I don't know" result */
1875                 ir_tarval    *result          = type_val & 2 ? get_mode_null(mode) :
1876                                                 get_mode_minus_one(mode);
1877
1878                 return new_d_Const(dbgi, result);
1879         }
1880         case bk_gnu_builtin_trap:
1881         case bk_ms__ud2:
1882         {
1883                 ir_type *tp  = get_ir_type(function_type);
1884                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 0, NULL, ir_bk_trap, tp);
1885                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1886                 return NULL;
1887         }
1888         case bk_ms__debugbreak: {
1889                 ir_type *tp  = get_ir_type(function_type);
1890                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 0, NULL, ir_bk_debugbreak, tp);
1891                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1892                 return NULL;
1893         }
1894         case bk_ms_ReturnAddress: {
1895                 ir_node *in[2];
1896
1897                 in[0] = new_Const(get_mode_null(mode_int));
1898                 in[1] = get_irg_frame(current_ir_graph);
1899                 ir_type *tp  = get_ir_type(function_type);
1900                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_return_address, tp);
1901                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1902         }
1903         case bk_ms_rotl:
1904         case bk_ms_rotl64: {
1905                 ir_node *val  = expression_to_firm(call->arguments->expression);
1906                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1907                 ir_mode *mode = get_irn_mode(val);
1908                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1909         }
1910         case bk_ms_rotr:
1911         case bk_ms_rotr64: {
1912                 ir_node *val  = expression_to_firm(call->arguments->expression);
1913                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1914                 ir_mode *mode = get_irn_mode(val);
1915                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1916                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1917                 return new_d_Rotl(dbgi, val, sub, mode);
1918         }
1919         case bk_ms_byteswap_ushort:
1920         case bk_ms_byteswap_ulong:
1921         case bk_ms_byteswap_uint64:
1922                 return gen_unary_builtin(ir_bk_bswap, call->arguments->expression, function_type, dbgi);
1923         case bk_ms__inbyte:
1924         case bk_ms__inword:
1925         case bk_ms__indword:
1926                 return gen_unary_builtin_pinned(ir_bk_inport, call->arguments->expression, function_type, dbgi);
1927         case bk_ms__outbyte:
1928         case bk_ms__outword:
1929         case bk_ms__outdword:
1930                 return gen_binary_builtin_mem(ir_bk_outport, call->arguments->expression,
1931                         call->arguments->next->expression, function_type, dbgi);
1932         default:
1933                 panic("unsupported builtin found");
1934         }
1935 }
1936
1937 /**
1938  * Transform a call expression.
1939  * Handles some special cases, like alloca() calls, which must be resolved
1940  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1941  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1942  * handled right...
1943  */
1944 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1945 {
1946         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1947         assert(currently_reachable());
1948
1949         expression_t *function = call->function;
1950         if (function->kind == EXPR_REFERENCE) {
1951                 const reference_expression_t *ref    = &function->reference;
1952                 entity_t                     *entity = ref->entity;
1953
1954                 if (entity->kind == ENTITY_FUNCTION) {
1955                         ir_entity *irentity = entity->function.irentity;
1956                         if (irentity == NULL)
1957                                 irentity = get_function_entity(entity, NULL);
1958
1959                         if (irentity == NULL && entity->function.btk != bk_none) {
1960                                 return process_builtin_call(call);
1961                         }
1962
1963 #if 0
1964                         if (irentity == rts_entities[rts_alloca]) {
1965                                 /* handle alloca() call */
1966                                 expression_t *argument = call->arguments->expression;
1967                                 ir_node      *size     = expression_to_firm(argument);
1968                                 ir_mode      *mode     = get_ir_mode_arithmetic(type_size_t);
1969
1970                                 size = create_conv(dbgi, size, mode);
1971
1972                                 ir_node  *store  = get_store();
1973                                 ir_node  *alloca = new_d_Alloc(dbgi, store, size,
1974                                                                firm_unknown_type, stack_alloc);
1975                                 ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1976                                 set_store(proj_m);
1977                                 ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1978
1979                                 return res;
1980                         }
1981 #endif
1982                 }
1983         }
1984         ir_node *callee = expression_to_firm(function);
1985
1986         type_t *type = skip_typeref(function->base.type);
1987         assert(is_type_pointer(type));
1988         pointer_type_t *pointer_type = &type->pointer;
1989         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1990         assert(is_type_function(points_to));
1991         function_type_t *function_type = &points_to->function;
1992
1993         int      n_parameters = 0;
1994         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1995         ir_type *new_method_type = NULL;
1996         if (function_type->variadic || function_type->unspecified_parameters) {
1997                 const call_argument_t *argument = call->arguments;
1998                 for ( ; argument != NULL; argument = argument->next) {
1999                         ++n_parameters;
2000                 }
2001
2002                 /* we need to construct a new method type matching the call
2003                  * arguments... */
2004                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
2005                 int n_res       = get_method_n_ress(ir_method_type);
2006                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
2007                 set_method_calling_convention(new_method_type,
2008                                get_method_calling_convention(ir_method_type));
2009                 set_method_additional_properties(new_method_type,
2010                                get_method_additional_properties(ir_method_type));
2011                 set_method_variadicity(new_method_type,
2012                                        get_method_variadicity(ir_method_type));
2013
2014                 for (int i = 0; i < n_res; ++i) {
2015                         set_method_res_type(new_method_type, i,
2016                                             get_method_res_type(ir_method_type, i));
2017                 }
2018                 argument = call->arguments;
2019                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
2020                         expression_t *expression = argument->expression;
2021                         ir_type      *irtype     = get_ir_type(expression->base.type);
2022                         set_method_param_type(new_method_type, i, irtype);
2023                 }
2024                 ir_method_type = new_method_type;
2025         } else {
2026                 n_parameters = get_method_n_params(ir_method_type);
2027         }
2028
2029         ir_node *in[n_parameters];
2030
2031         const call_argument_t *argument = call->arguments;
2032         for (int n = 0; n < n_parameters; ++n) {
2033                 expression_t *expression = argument->expression;
2034                 ir_node      *arg_node   = expression_to_firm(expression);
2035
2036                 type_t *arg_type = skip_typeref(expression->base.type);
2037                 if (!is_type_compound(arg_type)) {
2038                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
2039                         arg_node      = create_conv(dbgi, arg_node, mode);
2040                         arg_node      = do_strict_conv(dbgi, arg_node);
2041                 }
2042
2043                 in[n] = arg_node;
2044
2045                 argument = argument->next;
2046         }
2047
2048         ir_node  *store = get_store();
2049         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
2050                                      ir_method_type);
2051         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M);
2052         set_store(mem);
2053
2054         type_t  *return_type = skip_typeref(function_type->return_type);
2055         ir_node *result      = NULL;
2056
2057         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
2058                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
2059
2060                 if (is_type_scalar(return_type)) {
2061                         ir_mode *mode       = get_ir_mode_storage(return_type);
2062                         result              = new_d_Proj(dbgi, resproj, mode, 0);
2063                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
2064                         result              = create_conv(NULL, result, mode_arith);
2065                 } else {
2066                         ir_mode *mode = mode_P_data;
2067                         result        = new_d_Proj(dbgi, resproj, mode, 0);
2068                 }
2069         }
2070
2071         if (function->kind == EXPR_REFERENCE &&
2072             function->reference.entity->declaration.modifiers & DM_NORETURN) {
2073                 /* A dead end:  Keep the Call and the Block.  Also place all further
2074                  * nodes into a new and unreachable block. */
2075                 keep_alive(node);
2076                 keep_alive(get_cur_block());
2077                 ir_node *block = new_Block(0, NULL);
2078                 set_cur_block(block);
2079         }
2080
2081         return result;
2082 }
2083
2084 static void statement_to_firm(statement_t *statement);
2085 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
2086
2087 static ir_node *expression_to_addr(const expression_t *expression);
2088 static ir_node *create_condition_evaluation(const expression_t *expression,
2089                                             ir_node *true_block,
2090                                             ir_node *false_block);
2091
2092 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
2093                          ir_node *value)
2094 {
2095         if (!is_type_compound(type)) {
2096                 ir_mode *mode = get_ir_mode_storage(type);
2097                 value         = create_conv(dbgi, value, mode);
2098                 value         = do_strict_conv(dbgi, value);
2099         }
2100
2101         ir_node *memory = get_store();
2102
2103         if (is_type_scalar(type)) {
2104                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
2105                                       ? cons_volatile : cons_none;
2106                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
2107                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2108                 set_store(store_mem);
2109         } else {
2110                 ir_type *irtype    = get_ir_type(type);
2111                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
2112                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
2113                 set_store(copyb_mem);
2114         }
2115 }
2116
2117 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
2118 {
2119         ir_tarval *all_one   = get_mode_all_one(mode);
2120         int        mode_size = get_mode_size_bits(mode);
2121
2122         assert(offset >= 0);
2123         assert(size   >= 0);
2124         assert(offset + size <= mode_size);
2125         if (size == mode_size) {
2126                 return all_one;
2127         }
2128
2129         long       shiftr    = get_mode_size_bits(mode) - size;
2130         long       shiftl    = offset;
2131         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
2132         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
2133         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
2134         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
2135
2136         return mask1;
2137 }
2138
2139 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
2140                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
2141 {
2142         ir_type *entity_type = get_entity_type(entity);
2143         ir_type *base_type   = get_primitive_base_type(entity_type);
2144         assert(base_type != NULL);
2145         ir_mode *mode        = get_type_mode(base_type);
2146
2147         value = create_conv(dbgi, value, mode);
2148
2149         /* kill upper bits of value and shift to right position */
2150         int      bitoffset    = get_entity_offset_bits_remainder(entity);
2151         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
2152
2153         ir_tarval *mask            = create_bitfield_mask(mode, 0, bitsize);
2154         ir_node   *mask_node       = new_d_Const(dbgi, mask);
2155         ir_node   *value_masked    = new_d_And(dbgi, value, mask_node, mode);
2156         ir_tarval *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
2157         ir_node   *shiftcount      = new_d_Const(dbgi, shiftl);
2158         ir_node   *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
2159
2160         /* load current value */
2161         ir_node   *mem             = get_store();
2162         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
2163                                           set_volatile ? cons_volatile : cons_none);
2164         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2165         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
2166         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
2167         ir_tarval *inv_mask        = tarval_not(shift_mask);
2168         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
2169         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2170
2171         /* construct new value and store */
2172         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
2173         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
2174                                          set_volatile ? cons_volatile : cons_none);
2175         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2176         set_store(store_mem);
2177
2178         return value_masked;
2179 }
2180
2181 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2182                 ir_node *addr)
2183 {
2184         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
2185         type_t   *type     = expression->base.type;
2186         ir_mode  *mode     = get_ir_mode_storage(type);
2187         ir_node  *mem      = get_store();
2188         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode, cons_none);
2189         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2190         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2191
2192         load_res           = create_conv(dbgi, load_res, mode_int);
2193
2194         set_store(load_mem);
2195
2196         /* kill upper bits */
2197         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2198         ir_entity *entity       = expression->compound_entry->compound_member.entity;
2199         int        bitoffset    = get_entity_offset_bits_remainder(entity);
2200         ir_type   *entity_type  = get_entity_type(entity);
2201         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
2202         long       shift_bitsl  = machine_size - bitoffset - bitsize;
2203         assert(shift_bitsl >= 0);
2204         ir_tarval *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
2205         ir_node   *countl       = new_d_Const(dbgi, tvl);
2206         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
2207
2208         long       shift_bitsr  = bitoffset + shift_bitsl;
2209         assert(shift_bitsr <= (long) machine_size);
2210         ir_tarval *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
2211         ir_node   *countr       = new_d_Const(dbgi, tvr);
2212         ir_node   *shiftr;
2213         if (mode_is_signed(mode)) {
2214                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
2215         } else {
2216                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
2217         }
2218
2219         return create_conv(dbgi, shiftr, mode);
2220 }
2221
2222 /* make sure the selected compound type is constructed */
2223 static void construct_select_compound(const select_expression_t *expression)
2224 {
2225         type_t *type = skip_typeref(expression->compound->base.type);
2226         if (is_type_pointer(type)) {
2227                 type = type->pointer.points_to;
2228         }
2229         (void) get_ir_type(type);
2230 }
2231
2232 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2233                                               ir_node *value, ir_node *addr)
2234 {
2235         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2236         type_t   *type = skip_typeref(expression->base.type);
2237
2238         if (!is_type_compound(type)) {
2239                 ir_mode  *mode = get_ir_mode_storage(type);
2240                 value          = create_conv(dbgi, value, mode);
2241                 value          = do_strict_conv(dbgi, value);
2242         }
2243
2244         if (expression->kind == EXPR_REFERENCE) {
2245                 const reference_expression_t *ref = &expression->reference;
2246
2247                 entity_t *entity = ref->entity;
2248                 assert(is_declaration(entity));
2249                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2250                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2251                         set_value(entity->variable.v.value_number, value);
2252                         return value;
2253                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2254                         set_value(entity->parameter.v.value_number, value);
2255                         return value;
2256                 }
2257         }
2258
2259         if (addr == NULL)
2260                 addr = expression_to_addr(expression);
2261         assert(addr != NULL);
2262
2263         if (expression->kind == EXPR_SELECT) {
2264                 const select_expression_t *select = &expression->select;
2265
2266                 construct_select_compound(select);
2267
2268                 entity_t *entity = select->compound_entry;
2269                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2270                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
2271                         ir_entity *irentity = entity->compound_member.entity;
2272                         bool       set_volatile
2273                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2274                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2275                                                        set_volatile);
2276                         return value;
2277                 }
2278         }
2279
2280         assign_value(dbgi, addr, type, value);
2281         return value;
2282 }
2283
2284 static void set_value_for_expression(const expression_t *expression,
2285                                      ir_node *value)
2286 {
2287         set_value_for_expression_addr(expression, value, NULL);
2288 }
2289
2290 static ir_node *get_value_from_lvalue(const expression_t *expression,
2291                                       ir_node *addr)
2292 {
2293         if (expression->kind == EXPR_REFERENCE) {
2294                 const reference_expression_t *ref = &expression->reference;
2295
2296                 entity_t *entity = ref->entity;
2297                 assert(entity->kind == ENTITY_VARIABLE
2298                                 || entity->kind == ENTITY_PARAMETER);
2299                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2300                 int value_number;
2301                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2302                         value_number = entity->variable.v.value_number;
2303                         assert(addr == NULL);
2304                         type_t  *type = skip_typeref(expression->base.type);
2305                         ir_mode *mode = get_ir_mode_storage(type);
2306                         ir_node *res  = get_value(value_number, mode);
2307                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2308                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2309                         value_number = entity->parameter.v.value_number;
2310                         assert(addr == NULL);
2311                         type_t  *type = skip_typeref(expression->base.type);
2312                         ir_mode *mode = get_ir_mode_storage(type);
2313                         ir_node *res  = get_value(value_number, mode);
2314                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2315                 }
2316         }
2317
2318         assert(addr != NULL);
2319         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2320
2321         ir_node *value;
2322         if (expression->kind == EXPR_SELECT &&
2323             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2324             construct_select_compound(&expression->select);
2325                 value = bitfield_extract_to_firm(&expression->select, addr);
2326         } else {
2327                 value = deref_address(dbgi, expression->base.type, addr);
2328         }
2329
2330         return value;
2331 }
2332
2333
2334 static ir_node *create_incdec(const unary_expression_t *expression)
2335 {
2336         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2337         const expression_t *value_expr = expression->value;
2338         ir_node            *addr       = expression_to_addr(value_expr);
2339         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2340
2341         type_t  *type = skip_typeref(expression->base.type);
2342         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2343
2344         ir_node *offset;
2345         if (is_type_pointer(type)) {
2346                 pointer_type_t *pointer_type = &type->pointer;
2347                 offset = get_type_size_node(pointer_type->points_to);
2348         } else {
2349                 assert(is_type_arithmetic(type));
2350                 offset = new_Const(get_mode_one(mode));
2351         }
2352
2353         ir_node *result;
2354         ir_node *store_value;
2355         switch(expression->base.kind) {
2356         case EXPR_UNARY_POSTFIX_INCREMENT:
2357                 result      = value;
2358                 store_value = new_d_Add(dbgi, value, offset, mode);
2359                 break;
2360         case EXPR_UNARY_POSTFIX_DECREMENT:
2361                 result      = value;
2362                 store_value = new_d_Sub(dbgi, value, offset, mode);
2363                 break;
2364         case EXPR_UNARY_PREFIX_INCREMENT:
2365                 result      = new_d_Add(dbgi, value, offset, mode);
2366                 store_value = result;
2367                 break;
2368         case EXPR_UNARY_PREFIX_DECREMENT:
2369                 result      = new_d_Sub(dbgi, value, offset, mode);
2370                 store_value = result;
2371                 break;
2372         default:
2373                 panic("no incdec expr in create_incdec");
2374         }
2375
2376         set_value_for_expression_addr(value_expr, store_value, addr);
2377
2378         return result;
2379 }
2380
2381 static bool is_local_variable(expression_t *expression)
2382 {
2383         if (expression->kind != EXPR_REFERENCE)
2384                 return false;
2385         reference_expression_t *ref_expr = &expression->reference;
2386         entity_t               *entity   = ref_expr->entity;
2387         if (entity->kind != ENTITY_VARIABLE)
2388                 return false;
2389         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2390         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2391 }
2392
2393 static ir_relation get_relation(const expression_kind_t kind)
2394 {
2395         switch(kind) {
2396         case EXPR_BINARY_EQUAL:         return ir_relation_equal;
2397         case EXPR_BINARY_ISLESSGREATER: return ir_relation_less_greater;
2398         case EXPR_BINARY_NOTEQUAL:      return ir_relation_unordered_less_greater;
2399         case EXPR_BINARY_ISLESS:
2400         case EXPR_BINARY_LESS:          return ir_relation_less;
2401         case EXPR_BINARY_ISLESSEQUAL:
2402         case EXPR_BINARY_LESSEQUAL:     return ir_relation_less_equal;
2403         case EXPR_BINARY_ISGREATER:
2404         case EXPR_BINARY_GREATER:       return ir_relation_greater;
2405         case EXPR_BINARY_ISGREATEREQUAL:
2406         case EXPR_BINARY_GREATEREQUAL:  return ir_relation_greater_equal;
2407         case EXPR_BINARY_ISUNORDERED:   return ir_relation_unordered;
2408
2409         default:
2410                 break;
2411         }
2412         panic("trying to get pn_Cmp from non-comparison binexpr type");
2413 }
2414
2415 /**
2416  * Handle the assume optimizer hint: check if a Confirm
2417  * node can be created.
2418  *
2419  * @param dbi    debug info
2420  * @param expr   the IL assume expression
2421  *
2422  * we support here only some simple cases:
2423  *  - var rel const
2424  *  - const rel val
2425  *  - var rel var
2426  */
2427 static ir_node *handle_assume_compare(dbg_info *dbi,
2428                                       const binary_expression_t *expression)
2429 {
2430         expression_t *op1 = expression->left;
2431         expression_t *op2 = expression->right;
2432         entity_t     *var2, *var = NULL;
2433         ir_node      *res      = NULL;
2434         ir_relation   relation = get_relation(expression->base.kind);
2435
2436         if (is_local_variable(op1) && is_local_variable(op2)) {
2437                 var  = op1->reference.entity;
2438             var2 = op2->reference.entity;
2439
2440                 type_t  *const type = skip_typeref(var->declaration.type);
2441                 ir_mode *const mode = get_ir_mode_storage(type);
2442
2443                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2444                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2445
2446                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_relation(relation));
2447                 set_value(var2->variable.v.value_number, res);
2448
2449                 res = new_d_Confirm(dbi, irn1, irn2, relation);
2450                 set_value(var->variable.v.value_number, res);
2451
2452                 return res;
2453         }
2454
2455         expression_t *con = NULL;
2456         if (is_local_variable(op1) && is_constant_expression(op2) == EXPR_CLASS_CONSTANT) {
2457                 var = op1->reference.entity;
2458                 con = op2;
2459         } else if (is_constant_expression(op1) == EXPR_CLASS_CONSTANT && is_local_variable(op2)) {
2460                 relation = get_inversed_relation(relation);
2461                 var = op2->reference.entity;
2462                 con = op1;
2463         }
2464
2465         if (var != NULL) {
2466                 type_t  *const type = skip_typeref(var->declaration.type);
2467                 ir_mode *const mode = get_ir_mode_storage(type);
2468
2469                 res = get_value(var->variable.v.value_number, mode);
2470                 res = new_d_Confirm(dbi, res, expression_to_firm(con), relation);
2471                 set_value(var->variable.v.value_number, res);
2472         }
2473         return res;
2474 }
2475
2476 /**
2477  * Handle the assume optimizer hint.
2478  *
2479  * @param dbi    debug info
2480  * @param expr   the IL assume expression
2481  */
2482 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2483 {
2484         switch(expression->kind) {
2485         case EXPR_BINARY_EQUAL:
2486         case EXPR_BINARY_NOTEQUAL:
2487         case EXPR_BINARY_LESS:
2488         case EXPR_BINARY_LESSEQUAL:
2489         case EXPR_BINARY_GREATER:
2490         case EXPR_BINARY_GREATEREQUAL:
2491                 return handle_assume_compare(dbi, &expression->binary);
2492         default:
2493                 return NULL;
2494         }
2495 }
2496
2497 static ir_node *create_cast(dbg_info *dbgi, ir_node *value_node,
2498                             type_t *from_type, type_t *type)
2499 {
2500         type = skip_typeref(type);
2501         if (type == type_void) {
2502                 /* make sure firm type is constructed */
2503                 (void) get_ir_type(type);
2504                 return NULL;
2505         }
2506         if (!is_type_scalar(type)) {
2507                 /* make sure firm type is constructed */
2508                 (void) get_ir_type(type);
2509                 return value_node;
2510         }
2511
2512         from_type     = skip_typeref(from_type);
2513         ir_mode *mode = get_ir_mode_storage(type);
2514         /* check for conversion from / to __based types */
2515         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2516                 const variable_t *from_var = from_type->pointer.base_variable;
2517                 const variable_t *to_var   = type->pointer.base_variable;
2518                 if (from_var != to_var) {
2519                         if (from_var != NULL) {
2520                                 ir_node *const addr = create_symconst(dbgi, from_var->v.entity);
2521                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2522                                 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(from_type));
2523                         }
2524                         if (to_var != NULL) {
2525                                 ir_node *const addr = create_symconst(dbgi, to_var->v.entity);
2526                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2527                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2528                         }
2529                 }
2530         }
2531
2532         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2533                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2534                  * convert to mode_b so we only get a 0/1 value */
2535                 value_node = create_conv(dbgi, value_node, mode_b);
2536         }
2537
2538         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2539         ir_node *node       = create_conv(dbgi, value_node, mode);
2540         node                = do_strict_conv(dbgi, node);
2541         node                = create_conv(dbgi, node, mode_arith);
2542
2543         return node;
2544 }
2545
2546 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2547 {
2548         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2549         type_t   *type = skip_typeref(expression->base.type);
2550
2551         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2552                 return expression_to_addr(expression->value);
2553
2554         const expression_t *value = expression->value;
2555
2556         switch(expression->base.kind) {
2557         case EXPR_UNARY_NEGATE: {
2558                 ir_node *value_node = expression_to_firm(value);
2559                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2560                 return new_d_Minus(dbgi, value_node, mode);
2561         }
2562         case EXPR_UNARY_PLUS:
2563                 return expression_to_firm(value);
2564         case EXPR_UNARY_BITWISE_NEGATE: {
2565                 ir_node *value_node = expression_to_firm(value);
2566                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2567                 return new_d_Not(dbgi, value_node, mode);
2568         }
2569         case EXPR_UNARY_NOT: {
2570                 ir_node *value_node = _expression_to_firm(value);
2571                 value_node          = create_conv(dbgi, value_node, mode_b);
2572                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2573                 return res;
2574         }
2575         case EXPR_UNARY_DEREFERENCE: {
2576                 ir_node *value_node = expression_to_firm(value);
2577                 type_t  *value_type = skip_typeref(value->base.type);
2578                 assert(is_type_pointer(value_type));
2579
2580                 /* check for __based */
2581                 const variable_t *const base_var = value_type->pointer.base_variable;
2582                 if (base_var != NULL) {
2583                         ir_node *const addr = create_symconst(dbgi, base_var->v.entity);
2584                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2585                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2586                 }
2587                 type_t  *points_to  = value_type->pointer.points_to;
2588                 return deref_address(dbgi, points_to, value_node);
2589         }
2590         case EXPR_UNARY_POSTFIX_INCREMENT:
2591         case EXPR_UNARY_POSTFIX_DECREMENT:
2592         case EXPR_UNARY_PREFIX_INCREMENT:
2593         case EXPR_UNARY_PREFIX_DECREMENT:
2594                 return create_incdec(expression);
2595         case EXPR_UNARY_CAST: {
2596                 ir_node *value_node = expression_to_firm(value);
2597                 type_t  *from_type  = value->base.type;
2598                 return create_cast(dbgi, value_node, from_type, type);
2599         }
2600         case EXPR_UNARY_ASSUME:
2601                 return handle_assume(dbgi, value);
2602
2603         default:
2604                 break;
2605         }
2606         panic("invalid UNEXPR type found");
2607 }
2608
2609 /**
2610  * produces a 0/1 depending of the value of a mode_b node
2611  */
2612 static ir_node *produce_condition_result(const expression_t *expression,
2613                                          ir_mode *mode, dbg_info *dbgi)
2614 {
2615         ir_node *const one_block  = new_immBlock();
2616         ir_node *const zero_block = new_immBlock();
2617         create_condition_evaluation(expression, one_block, zero_block);
2618         mature_immBlock(one_block);
2619         mature_immBlock(zero_block);
2620
2621         ir_node *const jmp_one  = new_rd_Jmp(dbgi, one_block);
2622         ir_node *const jmp_zero = new_rd_Jmp(dbgi, zero_block);
2623         ir_node *const in_cf[2] = { jmp_one, jmp_zero };
2624         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
2625         set_cur_block(block);
2626
2627         ir_node *const one   = new_Const(get_mode_one(mode));
2628         ir_node *const zero  = new_Const(get_mode_null(mode));
2629         ir_node *const in[2] = { one, zero };
2630         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
2631
2632         return val;
2633 }
2634
2635 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2636                 ir_node *value, type_t *type)
2637 {
2638         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2639         assert(is_type_pointer(type));
2640         pointer_type_t *const pointer_type = &type->pointer;
2641         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2642         ir_node        *      elem_size    = get_type_size_node(points_to);
2643         elem_size                          = create_conv(dbgi, elem_size, mode);
2644         value                              = create_conv(dbgi, value,     mode);
2645         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2646         return mul;
2647 }
2648
2649 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2650                           ir_node *left, ir_node *right)
2651 {
2652         ir_mode  *mode;
2653         type_t   *type_left  = skip_typeref(expression->left->base.type);
2654         type_t   *type_right = skip_typeref(expression->right->base.type);
2655
2656         expression_kind_t kind = expression->base.kind;
2657
2658         switch (kind) {
2659         case EXPR_BINARY_SHIFTLEFT:
2660         case EXPR_BINARY_SHIFTRIGHT:
2661         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2662         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2663                 mode  = get_ir_mode_arithmetic(expression->base.type);
2664                 right = create_conv(dbgi, right, mode_uint);
2665                 break;
2666
2667         case EXPR_BINARY_SUB:
2668                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2669                         const pointer_type_t *const ptr_type = &type_left->pointer;
2670
2671                         mode = get_ir_mode_arithmetic(expression->base.type);
2672                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2673                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2674                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2675                         ir_node *const no_mem    = new_NoMem();
2676                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2677                                                                                                    mode, op_pin_state_floats);
2678                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2679                 }
2680                 /* fallthrough */
2681         case EXPR_BINARY_SUB_ASSIGN:
2682                 if (is_type_pointer(type_left)) {
2683                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2684                         mode  = get_ir_mode_arithmetic(type_left);
2685                         break;
2686                 }
2687                 goto normal_node;
2688
2689         case EXPR_BINARY_ADD:
2690         case EXPR_BINARY_ADD_ASSIGN:
2691                 if (is_type_pointer(type_left)) {
2692                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2693                         mode  = get_ir_mode_arithmetic(type_left);
2694                         break;
2695                 } else if (is_type_pointer(type_right)) {
2696                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2697                         mode  = get_ir_mode_arithmetic(type_right);
2698                         break;
2699                 }
2700                 goto normal_node;
2701
2702         default:
2703 normal_node:
2704                 mode = get_ir_mode_arithmetic(type_right);
2705                 left = create_conv(dbgi, left, mode);
2706                 break;
2707         }
2708
2709         switch (kind) {
2710         case EXPR_BINARY_ADD_ASSIGN:
2711         case EXPR_BINARY_ADD:
2712                 return new_d_Add(dbgi, left, right, mode);
2713         case EXPR_BINARY_SUB_ASSIGN:
2714         case EXPR_BINARY_SUB:
2715                 return new_d_Sub(dbgi, left, right, mode);
2716         case EXPR_BINARY_MUL_ASSIGN:
2717         case EXPR_BINARY_MUL:
2718                 return new_d_Mul(dbgi, left, right, mode);
2719         case EXPR_BINARY_BITWISE_AND:
2720         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2721                 return new_d_And(dbgi, left, right, mode);
2722         case EXPR_BINARY_BITWISE_OR:
2723         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2724                 return new_d_Or(dbgi, left, right, mode);
2725         case EXPR_BINARY_BITWISE_XOR:
2726         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2727                 return new_d_Eor(dbgi, left, right, mode);
2728         case EXPR_BINARY_SHIFTLEFT:
2729         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2730                 return new_d_Shl(dbgi, left, right, mode);
2731         case EXPR_BINARY_SHIFTRIGHT:
2732         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2733                 if (mode_is_signed(mode)) {
2734                         return new_d_Shrs(dbgi, left, right, mode);
2735                 } else {
2736                         return new_d_Shr(dbgi, left, right, mode);
2737                 }
2738         case EXPR_BINARY_DIV:
2739         case EXPR_BINARY_DIV_ASSIGN: {
2740                 ir_node *pin = new_Pin(new_NoMem());
2741                 ir_node *op  = new_d_Div(dbgi, pin, left, right, mode,
2742                                          op_pin_state_floats);
2743                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2744                 return res;
2745         }
2746         case EXPR_BINARY_MOD:
2747         case EXPR_BINARY_MOD_ASSIGN: {
2748                 ir_node *pin = new_Pin(new_NoMem());
2749                 assert(!mode_is_float(mode));
2750                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2751                                          op_pin_state_floats);
2752                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2753                 return res;
2754         }
2755         default:
2756                 panic("unexpected expression kind");
2757         }
2758 }
2759
2760 static ir_node *create_lazy_op(const binary_expression_t *expression)
2761 {
2762         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2763         type_t   *type = skip_typeref(expression->base.type);
2764         ir_mode  *mode = get_ir_mode_arithmetic(type);
2765
2766         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2767                 bool val = fold_constant_to_bool(expression->left);
2768                 expression_kind_t ekind = expression->base.kind;
2769                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2770                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2771                         if (!val) {
2772                                 return new_Const(get_mode_null(mode));
2773                         }
2774                 } else {
2775                         if (val) {
2776                                 return new_Const(get_mode_one(mode));
2777                         }
2778                 }
2779
2780                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2781                         bool valr = fold_constant_to_bool(expression->right);
2782                         return create_Const_from_bool(mode, valr);
2783                 }
2784
2785                 return produce_condition_result(expression->right, mode, dbgi);
2786         }
2787
2788         return produce_condition_result((const expression_t*) expression, mode,
2789                                         dbgi);
2790 }
2791
2792 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2793                                             ir_node *right, ir_mode *mode);
2794
2795 static ir_node *create_assign_binop(const binary_expression_t *expression)
2796 {
2797         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2798         const expression_t *left_expr = expression->left;
2799         type_t             *type      = skip_typeref(left_expr->base.type);
2800         ir_node            *right     = expression_to_firm(expression->right);
2801         ir_node            *left_addr = expression_to_addr(left_expr);
2802         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2803         ir_node            *result    = create_op(dbgi, expression, left, right);
2804
2805         result = create_cast(dbgi, result, expression->right->base.type, type);
2806         result = do_strict_conv(dbgi, result);
2807
2808         result = set_value_for_expression_addr(left_expr, result, left_addr);
2809
2810         if (!is_type_compound(type)) {
2811                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2812                 result = create_conv(dbgi, result, mode_arithmetic);
2813         }
2814         return result;
2815 }
2816
2817 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2818 {
2819         expression_kind_t kind = expression->base.kind;
2820
2821         switch(kind) {
2822         case EXPR_BINARY_EQUAL:
2823         case EXPR_BINARY_NOTEQUAL:
2824         case EXPR_BINARY_LESS:
2825         case EXPR_BINARY_LESSEQUAL:
2826         case EXPR_BINARY_GREATER:
2827         case EXPR_BINARY_GREATEREQUAL:
2828         case EXPR_BINARY_ISGREATER:
2829         case EXPR_BINARY_ISGREATEREQUAL:
2830         case EXPR_BINARY_ISLESS:
2831         case EXPR_BINARY_ISLESSEQUAL:
2832         case EXPR_BINARY_ISLESSGREATER:
2833         case EXPR_BINARY_ISUNORDERED: {
2834                 dbg_info   *dbgi     = get_dbg_info(&expression->base.source_position);
2835                 ir_node    *left     = expression_to_firm(expression->left);
2836                 ir_node    *right    = expression_to_firm(expression->right);
2837                 ir_relation relation = get_relation(kind);
2838                 ir_node    *cmp      = new_d_Cmp(dbgi, left, right, relation);
2839                 return cmp;
2840         }
2841         case EXPR_BINARY_ASSIGN: {
2842                 ir_node *addr  = expression_to_addr(expression->left);
2843                 ir_node *right = expression_to_firm(expression->right);
2844                 ir_node *res
2845                         = set_value_for_expression_addr(expression->left, right, addr);
2846
2847                 type_t  *type            = skip_typeref(expression->base.type);
2848                 if (!is_type_compound(type)) {
2849                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2850                         res                      = create_conv(NULL, res, mode_arithmetic);
2851                 }
2852                 return res;
2853         }
2854         case EXPR_BINARY_ADD:
2855         case EXPR_BINARY_SUB:
2856         case EXPR_BINARY_MUL:
2857         case EXPR_BINARY_DIV:
2858         case EXPR_BINARY_MOD:
2859         case EXPR_BINARY_BITWISE_AND:
2860         case EXPR_BINARY_BITWISE_OR:
2861         case EXPR_BINARY_BITWISE_XOR:
2862         case EXPR_BINARY_SHIFTLEFT:
2863         case EXPR_BINARY_SHIFTRIGHT:
2864         {
2865                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2866                 ir_node  *left  = expression_to_firm(expression->left);
2867                 ir_node  *right = expression_to_firm(expression->right);
2868                 return create_op(dbgi, expression, left, right);
2869         }
2870         case EXPR_BINARY_LOGICAL_AND:
2871         case EXPR_BINARY_LOGICAL_OR:
2872                 return create_lazy_op(expression);
2873         case EXPR_BINARY_COMMA:
2874                 /* create side effects of left side */
2875                 (void) expression_to_firm(expression->left);
2876                 return _expression_to_firm(expression->right);
2877
2878         case EXPR_BINARY_ADD_ASSIGN:
2879         case EXPR_BINARY_SUB_ASSIGN:
2880         case EXPR_BINARY_MUL_ASSIGN:
2881         case EXPR_BINARY_MOD_ASSIGN:
2882         case EXPR_BINARY_DIV_ASSIGN:
2883         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2884         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2885         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2886         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2887         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2888                 return create_assign_binop(expression);
2889         default:
2890                 panic("TODO binexpr type");
2891         }
2892 }
2893
2894 static ir_node *array_access_addr(const array_access_expression_t *expression)
2895 {
2896         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2897         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2898         ir_node  *offset      = expression_to_firm(expression->index);
2899         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2900         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2901         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2902
2903         return result;
2904 }
2905
2906 static ir_node *array_access_to_firm(
2907                 const array_access_expression_t *expression)
2908 {
2909         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2910         ir_node  *addr   = array_access_addr(expression);
2911         type_t   *type   = revert_automatic_type_conversion(
2912                         (const expression_t*) expression);
2913         type             = skip_typeref(type);
2914
2915         return deref_address(dbgi, type, addr);
2916 }
2917
2918 static long get_offsetof_offset(const offsetof_expression_t *expression)
2919 {
2920         type_t *orig_type = expression->type;
2921         long    offset    = 0;
2922
2923         designator_t *designator = expression->designator;
2924         for ( ; designator != NULL; designator = designator->next) {
2925                 type_t *type = skip_typeref(orig_type);
2926                 /* be sure the type is constructed */
2927                 (void) get_ir_type(type);
2928
2929                 if (designator->symbol != NULL) {
2930                         assert(is_type_compound(type));
2931                         symbol_t *symbol = designator->symbol;
2932
2933                         compound_t *compound = type->compound.compound;
2934                         entity_t   *iter     = compound->members.entities;
2935                         for ( ; iter != NULL; iter = iter->base.next) {
2936                                 if (iter->base.symbol == symbol) {
2937                                         break;
2938                                 }
2939                         }
2940                         assert(iter != NULL);
2941
2942                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2943                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2944                         offset += get_entity_offset(iter->compound_member.entity);
2945
2946                         orig_type = iter->declaration.type;
2947                 } else {
2948                         expression_t *array_index = designator->array_index;
2949                         assert(designator->array_index != NULL);
2950                         assert(is_type_array(type));
2951
2952                         long index         = fold_constant_to_int(array_index);
2953                         ir_type *arr_type  = get_ir_type(type);
2954                         ir_type *elem_type = get_array_element_type(arr_type);
2955                         long     elem_size = get_type_size_bytes(elem_type);
2956
2957                         offset += index * elem_size;
2958
2959                         orig_type = type->array.element_type;
2960                 }
2961         }
2962
2963         return offset;
2964 }
2965
2966 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2967 {
2968         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
2969         long       offset = get_offsetof_offset(expression);
2970         ir_tarval *tv     = new_tarval_from_long(offset, mode);
2971         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
2972
2973         return new_d_Const(dbgi, tv);
2974 }
2975
2976 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2977                                      ir_entity *entity, type_t *type);
2978
2979 static ir_node *compound_literal_to_firm(
2980                 const compound_literal_expression_t *expression)
2981 {
2982         type_t *type = expression->type;
2983
2984         /* create an entity on the stack */
2985         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2986
2987         ident     *const id     = id_unique("CompLit.%u");
2988         ir_type   *const irtype = get_ir_type(type);
2989         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2990         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2991         set_entity_ld_ident(entity, id);
2992
2993         /* create initialisation code */
2994         initializer_t *initializer = expression->initializer;
2995         create_local_initializer(initializer, dbgi, entity, type);
2996
2997         /* create a sel for the compound literal address */
2998         ir_node *frame = get_irg_frame(current_ir_graph);
2999         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3000         return sel;
3001 }
3002
3003 /**
3004  * Transform a sizeof expression into Firm code.
3005  */
3006 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
3007 {
3008         type_t *const type = skip_typeref(expression->type);
3009         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
3010         if (is_type_array(type) && type->array.is_vla
3011                         && expression->tp_expression != NULL) {
3012                 expression_to_firm(expression->tp_expression);
3013         }
3014         /* strange gnu extensions: sizeof(function) == 1 */
3015         if (is_type_function(type)) {
3016                 ir_mode *mode = get_ir_mode_storage(type_size_t);
3017                 return new_Const(get_mode_one(mode));
3018         }
3019
3020         return get_type_size_node(type);
3021 }
3022
3023 static entity_t *get_expression_entity(const expression_t *expression)
3024 {
3025         if (expression->kind != EXPR_REFERENCE)
3026                 return NULL;
3027
3028         return expression->reference.entity;
3029 }
3030
3031 static unsigned get_cparser_entity_alignment(const entity_t *entity)
3032 {
3033         switch(entity->kind) {
3034         DECLARATION_KIND_CASES
3035                 return entity->declaration.alignment;
3036         case ENTITY_STRUCT:
3037         case ENTITY_UNION:
3038                 return entity->compound.alignment;
3039         case ENTITY_TYPEDEF:
3040                 return entity->typedefe.alignment;
3041         default:
3042                 break;
3043         }
3044         return 0;
3045 }
3046
3047 /**
3048  * Transform an alignof expression into Firm code.
3049  */
3050 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
3051 {
3052         unsigned alignment = 0;
3053
3054         const expression_t *tp_expression = expression->tp_expression;
3055         if (tp_expression != NULL) {
3056                 entity_t *entity = get_expression_entity(tp_expression);
3057                 if (entity != NULL) {
3058                         if (entity->kind == ENTITY_FUNCTION) {
3059                                 /* a gnu-extension */
3060                                 alignment = 1;
3061                         } else {
3062                                 alignment = get_cparser_entity_alignment(entity);
3063                         }
3064                 }
3065         }
3066
3067         if (alignment == 0) {
3068                 type_t *type = expression->type;
3069                 alignment = get_type_alignment(type);
3070         }
3071
3072         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
3073         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
3074         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
3075         return new_d_Const(dbgi, tv);
3076 }
3077
3078 static void init_ir_types(void);
3079
3080 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
3081 {
3082         assert(is_type_valid(skip_typeref(expression->base.type)));
3083
3084         bool constant_folding_old = constant_folding;
3085         constant_folding = true;
3086
3087         init_ir_types();
3088
3089         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
3090
3091         ir_graph *old_current_ir_graph = current_ir_graph;
3092         current_ir_graph = get_const_code_irg();
3093
3094         ir_node *cnst = expression_to_firm(expression);
3095         current_ir_graph = old_current_ir_graph;
3096
3097         if (!is_Const(cnst)) {
3098                 panic("couldn't fold constant");
3099         }
3100
3101         constant_folding = constant_folding_old;
3102
3103         return get_Const_tarval(cnst);
3104 }
3105
3106 long fold_constant_to_int(const expression_t *expression)
3107 {
3108         if (expression->kind == EXPR_INVALID)
3109                 return 0;
3110
3111         ir_tarval *tv = fold_constant_to_tarval(expression);
3112         if (!tarval_is_long(tv)) {
3113                 panic("result of constant folding is not integer");
3114         }
3115
3116         return get_tarval_long(tv);
3117 }
3118
3119 bool fold_constant_to_bool(const expression_t *expression)
3120 {
3121         if (expression->kind == EXPR_INVALID)
3122                 return false;
3123         ir_tarval *tv = fold_constant_to_tarval(expression);
3124         return !tarval_is_null(tv);
3125 }
3126
3127 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3128 {
3129         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3130
3131         /* first try to fold a constant condition */
3132         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3133                 bool val = fold_constant_to_bool(expression->condition);
3134                 if (val) {
3135                         expression_t *true_expression = expression->true_expression;
3136                         if (true_expression == NULL)
3137                                 true_expression = expression->condition;
3138                         return expression_to_firm(true_expression);
3139                 } else {
3140                         return expression_to_firm(expression->false_expression);
3141                 }
3142         }
3143
3144         ir_node *const true_block  = new_immBlock();
3145         ir_node *const false_block = new_immBlock();
3146         ir_node *const cond_expr   = create_condition_evaluation(expression->condition, true_block, false_block);
3147         mature_immBlock(true_block);
3148         mature_immBlock(false_block);
3149
3150         set_cur_block(true_block);
3151         ir_node *true_val;
3152         if (expression->true_expression != NULL) {
3153                 true_val = expression_to_firm(expression->true_expression);
3154         } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3155                 true_val = cond_expr;
3156         } else {
3157                 /* Condition ended with a short circuit (&&, ||, !) operation or a
3158                  * comparison.  Generate a "1" as value for the true branch. */
3159                 true_val = new_Const(get_mode_one(mode_Is));
3160         }
3161         ir_node *const true_jmp = new_d_Jmp(dbgi);
3162
3163         set_cur_block(false_block);
3164         ir_node *const false_val = expression_to_firm(expression->false_expression);
3165         ir_node *const false_jmp = new_d_Jmp(dbgi);
3166
3167         /* create the common block */
3168         ir_node *const in_cf[2] = { true_jmp, false_jmp };
3169         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
3170         set_cur_block(block);
3171
3172         /* TODO improve static semantics, so either both or no values are NULL */
3173         if (true_val == NULL || false_val == NULL)
3174                 return NULL;
3175
3176         ir_node *const in[2] = { true_val, false_val };
3177         type_t  *const type  = skip_typeref(expression->base.type);
3178         ir_mode *mode;
3179         if (is_type_compound(type)) {
3180                 mode = mode_P;
3181         } else {
3182                 mode = get_ir_mode_arithmetic(type);
3183         }
3184         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
3185
3186         return val;
3187 }
3188
3189 /**
3190  * Returns an IR-node representing the address of a field.
3191  */
3192 static ir_node *select_addr(const select_expression_t *expression)
3193 {
3194         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3195
3196         construct_select_compound(expression);
3197
3198         ir_node *compound_addr = expression_to_firm(expression->compound);
3199
3200         entity_t *entry = expression->compound_entry;
3201         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3202         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3203
3204         if (constant_folding) {
3205                 ir_mode *mode = get_irn_mode(compound_addr);
3206                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
3207                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
3208                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3209         } else {
3210                 ir_entity *irentity = entry->compound_member.entity;
3211                 assert(irentity != NULL);
3212                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3213         }
3214 }
3215
3216 static ir_node *select_to_firm(const select_expression_t *expression)
3217 {
3218         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3219         ir_node  *addr = select_addr(expression);
3220         type_t   *type = revert_automatic_type_conversion(
3221                         (const expression_t*) expression);
3222         type           = skip_typeref(type);
3223
3224         entity_t *entry      = expression->compound_entry;
3225         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3226         type_t   *entry_type = skip_typeref(entry->declaration.type);
3227
3228         if (entry_type->kind == TYPE_BITFIELD) {
3229                 return bitfield_extract_to_firm(expression, addr);
3230         }
3231
3232         return deref_address(dbgi, type, addr);
3233 }
3234
3235 /* Values returned by __builtin_classify_type. */
3236 typedef enum gcc_type_class
3237 {
3238         no_type_class = -1,
3239         void_type_class,
3240         integer_type_class,
3241         char_type_class,
3242         enumeral_type_class,
3243         boolean_type_class,
3244         pointer_type_class,
3245         reference_type_class,
3246         offset_type_class,
3247         real_type_class,
3248         complex_type_class,
3249         function_type_class,
3250         method_type_class,
3251         record_type_class,
3252         union_type_class,
3253         array_type_class,
3254         string_type_class,
3255         set_type_class,
3256         file_type_class,
3257         lang_type_class
3258 } gcc_type_class;
3259
3260 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3261 {
3262         type_t *type = expr->type_expression->base.type;
3263
3264         /* FIXME gcc returns different values depending on whether compiling C or C++
3265          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3266         gcc_type_class tc;
3267         for (;;) {
3268                 type = skip_typeref(type);
3269                 switch (type->kind) {
3270                         case TYPE_ATOMIC: {
3271                                 const atomic_type_t *const atomic_type = &type->atomic;
3272                                 switch (atomic_type->akind) {
3273                                         /* should not be reached */
3274                                         case ATOMIC_TYPE_INVALID:
3275                                                 tc = no_type_class;
3276                                                 goto make_const;
3277
3278                                         /* gcc cannot do that */
3279                                         case ATOMIC_TYPE_VOID:
3280                                                 tc = void_type_class;
3281                                                 goto make_const;
3282
3283                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3284                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3285                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3286                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3287                                         case ATOMIC_TYPE_SHORT:
3288                                         case ATOMIC_TYPE_USHORT:
3289                                         case ATOMIC_TYPE_INT:
3290                                         case ATOMIC_TYPE_UINT:
3291                                         case ATOMIC_TYPE_LONG:
3292                                         case ATOMIC_TYPE_ULONG:
3293                                         case ATOMIC_TYPE_LONGLONG:
3294                                         case ATOMIC_TYPE_ULONGLONG:
3295                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3296                                                 tc = integer_type_class;
3297                                                 goto make_const;
3298
3299                                         case ATOMIC_TYPE_FLOAT:
3300                                         case ATOMIC_TYPE_DOUBLE:
3301                                         case ATOMIC_TYPE_LONG_DOUBLE:
3302                                                 tc = real_type_class;
3303                                                 goto make_const;
3304                                 }
3305                                 panic("Unexpected atomic type in classify_type_to_firm().");
3306                         }
3307
3308                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3309                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3310                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
3311                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3312                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3313                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3314                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3315                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3316
3317                         /* gcc handles this as integer */
3318                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3319
3320                         /* gcc classifies the referenced type */
3321                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3322
3323                         /* typedef/typeof should be skipped already */
3324                         case TYPE_TYPEDEF:
3325                         case TYPE_TYPEOF:
3326                         case TYPE_INVALID:
3327                         case TYPE_ERROR:
3328                                 break;
3329                 }
3330                 panic("unexpected TYPE classify_type_to_firm().");
3331         }
3332
3333 make_const:;
3334         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3335         ir_tarval *const tv   = new_tarval_from_long(tc, mode_int);
3336         return new_d_Const(dbgi, tv);
3337 }
3338
3339 static ir_node *function_name_to_firm(
3340                 const funcname_expression_t *const expr)
3341 {
3342         switch(expr->kind) {
3343         case FUNCNAME_FUNCTION:
3344         case FUNCNAME_PRETTY_FUNCTION:
3345         case FUNCNAME_FUNCDNAME:
3346                 if (current_function_name == NULL) {
3347                         const source_position_t *const src_pos = &expr->base.source_position;
3348                         const char    *name  = current_function_entity->base.symbol->string;
3349                         const string_t string = { name, strlen(name) + 1 };
3350                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3351                 }
3352                 return current_function_name;
3353         case FUNCNAME_FUNCSIG:
3354                 if (current_funcsig == NULL) {
3355                         const source_position_t *const src_pos = &expr->base.source_position;
3356                         ir_entity *ent = get_irg_entity(current_ir_graph);
3357                         const char *const name = get_entity_ld_name(ent);
3358                         const string_t string = { name, strlen(name) + 1 };
3359                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3360                 }
3361                 return current_funcsig;
3362         }
3363         panic("Unsupported function name");
3364 }
3365
3366 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3367 {
3368         statement_t *statement = expr->statement;
3369
3370         assert(statement->kind == STATEMENT_COMPOUND);
3371         return compound_statement_to_firm(&statement->compound);
3372 }
3373
3374 static ir_node *va_start_expression_to_firm(
3375         const va_start_expression_t *const expr)
3376 {
3377         ir_graph  *const irg         = current_ir_graph;
3378         type_t    *const type        = current_function_entity->declaration.type;
3379         ir_type   *const method_type = get_ir_type(type);
3380         size_t     const n           = get_method_n_params(method_type) - 1;
3381         ir_type   *frame_type        = get_irg_frame_type(irg);
3382         ir_type   *param_irtype      = get_method_param_type(method_type, n);
3383         ir_entity *const param_ent   =
3384                 new_parameter_entity(frame_type, n, param_irtype);
3385         ir_node   *const frame       = get_irg_frame(irg);
3386         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3387         ir_node   *const no_mem      = new_NoMem();
3388         ir_node   *const arg_sel     =
3389                 new_d_simpleSel(dbgi, no_mem, frame, param_ent);
3390
3391         type_t    *const param_type  = expr->parameter->base.type;
3392         ir_node   *const cnst        = get_type_size_node(param_type);
3393         ir_mode   *const mode        = get_irn_mode(cnst);
3394         ir_node   *const c1          = new_Const_long(mode, stack_param_align - 1);
3395         ir_node   *const c2          = new_d_Add(dbgi, cnst, c1, mode);
3396         ir_node   *const c3          = new_Const_long(mode, -(long)stack_param_align);
3397         ir_node   *const c4          = new_d_And(dbgi, c2, c3, mode);
3398         ir_node   *const add         = new_d_Add(dbgi, arg_sel, c4, mode_P_data);
3399         set_value_for_expression(expr->ap, add);
3400
3401         return NULL;
3402 }
3403
3404 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3405 {
3406         type_t       *const type    = expr->base.type;
3407         expression_t *const ap_expr = expr->ap;
3408         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3409         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3410         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3411         ir_node      *const res     = deref_address(dbgi, type, ap);
3412
3413         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3414         ir_mode      *const mode    = get_irn_mode(cnst);
3415         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3416         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3417         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3418         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3419         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3420
3421         set_value_for_expression_addr(ap_expr, add, ap_addr);
3422
3423         return res;
3424 }
3425
3426 /**
3427  * Generate Firm for a va_copy expression.
3428  */
3429 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3430 {
3431         ir_node *const src = expression_to_firm(expr->src);
3432         set_value_for_expression(expr->dst, src);
3433         return NULL;
3434 }
3435
3436 static ir_node *dereference_addr(const unary_expression_t *const expression)
3437 {
3438         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3439         return expression_to_firm(expression->value);
3440 }
3441
3442 /**
3443  * Returns a IR-node representing an lvalue of the given expression.
3444  */
3445 static ir_node *expression_to_addr(const expression_t *expression)
3446 {
3447         switch(expression->kind) {
3448         case EXPR_ARRAY_ACCESS:
3449                 return array_access_addr(&expression->array_access);
3450         case EXPR_CALL:
3451                 return call_expression_to_firm(&expression->call);
3452         case EXPR_COMPOUND_LITERAL:
3453                 return compound_literal_to_firm(&expression->compound_literal);
3454         case EXPR_REFERENCE:
3455                 return reference_addr(&expression->reference);
3456         case EXPR_SELECT:
3457                 return select_addr(&expression->select);
3458         case EXPR_UNARY_DEREFERENCE:
3459                 return dereference_addr(&expression->unary);
3460         default:
3461                 break;
3462         }
3463         panic("trying to get address of non-lvalue");
3464 }
3465
3466 static ir_node *builtin_constant_to_firm(
3467                 const builtin_constant_expression_t *expression)
3468 {
3469         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3470         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3471         return create_Const_from_bool(mode, v);
3472 }
3473
3474 static ir_node *builtin_types_compatible_to_firm(
3475                 const builtin_types_compatible_expression_t *expression)
3476 {
3477         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3478         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3479         bool     const value = types_compatible(left, right);
3480         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3481         return create_Const_from_bool(mode, value);
3482 }
3483
3484 static ir_node *get_label_block(label_t *label)
3485 {
3486         if (label->block != NULL)
3487                 return label->block;
3488
3489         /* beware: might be called from create initializer with current_ir_graph
3490          * set to const_code_irg. */
3491         ir_graph *rem    = current_ir_graph;
3492         current_ir_graph = current_function;
3493
3494         ir_node *block = new_immBlock();
3495
3496         label->block = block;
3497
3498         ARR_APP1(label_t *, all_labels, label);
3499
3500         current_ir_graph = rem;
3501         return block;
3502 }
3503
3504 /**
3505  * Pointer to a label.  This is used for the
3506  * GNU address-of-label extension.
3507  */
3508 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3509 {
3510         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3511         ir_node   *block  = get_label_block(label->label);
3512         ir_entity *entity = create_Block_entity(block);
3513
3514         symconst_symbol value;
3515         value.entity_p = entity;
3516         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3517 }
3518
3519 /**
3520  * creates firm nodes for an expression. The difference between this function
3521  * and expression_to_firm is, that this version might produce mode_b nodes
3522  * instead of mode_Is.
3523  */
3524 static ir_node *_expression_to_firm(const expression_t *expression)
3525 {
3526 #ifndef NDEBUG
3527         if (!constant_folding) {
3528                 assert(!expression->base.transformed);
3529                 ((expression_t*) expression)->base.transformed = true;
3530         }
3531 #endif
3532
3533         switch (expression->kind) {
3534         EXPR_LITERAL_CASES
3535                 return literal_to_firm(&expression->literal);
3536         case EXPR_STRING_LITERAL:
3537                 return string_to_firm(&expression->base.source_position, "str.%u",
3538                                       &expression->literal.value);
3539         case EXPR_WIDE_STRING_LITERAL:
3540                 return wide_string_literal_to_firm(&expression->string_literal);
3541         case EXPR_REFERENCE:
3542                 return reference_expression_to_firm(&expression->reference);
3543         case EXPR_REFERENCE_ENUM_VALUE:
3544                 return reference_expression_enum_value_to_firm(&expression->reference);
3545         case EXPR_CALL:
3546                 return call_expression_to_firm(&expression->call);
3547         EXPR_UNARY_CASES
3548                 return unary_expression_to_firm(&expression->unary);
3549         EXPR_BINARY_CASES
3550                 return binary_expression_to_firm(&expression->binary);
3551         case EXPR_ARRAY_ACCESS:
3552                 return array_access_to_firm(&expression->array_access);
3553         case EXPR_SIZEOF:
3554                 return sizeof_to_firm(&expression->typeprop);
3555         case EXPR_ALIGNOF:
3556                 return alignof_to_firm(&expression->typeprop);
3557         case EXPR_CONDITIONAL:
3558                 return conditional_to_firm(&expression->conditional);
3559         case EXPR_SELECT:
3560                 return select_to_firm(&expression->select);
3561         case EXPR_CLASSIFY_TYPE:
3562                 return classify_type_to_firm(&expression->classify_type);
3563         case EXPR_FUNCNAME:
3564                 return function_name_to_firm(&expression->funcname);
3565         case EXPR_STATEMENT:
3566                 return statement_expression_to_firm(&expression->statement);
3567         case EXPR_VA_START:
3568                 return va_start_expression_to_firm(&expression->va_starte);
3569         case EXPR_VA_ARG:
3570                 return va_arg_expression_to_firm(&expression->va_arge);
3571         case EXPR_VA_COPY:
3572                 return va_copy_expression_to_firm(&expression->va_copye);
3573         case EXPR_BUILTIN_CONSTANT_P:
3574                 return builtin_constant_to_firm(&expression->builtin_constant);
3575         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3576                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3577         case EXPR_OFFSETOF:
3578                 return offsetof_to_firm(&expression->offsetofe);
3579         case EXPR_COMPOUND_LITERAL:
3580                 return compound_literal_to_firm(&expression->compound_literal);
3581         case EXPR_LABEL_ADDRESS:
3582                 return label_address_to_firm(&expression->label_address);
3583
3584         case EXPR_UNKNOWN:
3585         case EXPR_INVALID:
3586                 break;
3587         }
3588         panic("invalid expression found");
3589 }
3590
3591 /**
3592  * Check if a given expression is a GNU __builtin_expect() call.
3593  */
3594 static bool is_builtin_expect(const expression_t *expression)
3595 {
3596         if (expression->kind != EXPR_CALL)
3597                 return false;
3598
3599         expression_t *function = expression->call.function;
3600         if (function->kind != EXPR_REFERENCE)
3601                 return false;
3602         reference_expression_t *ref = &function->reference;
3603         if (ref->entity->kind         != ENTITY_FUNCTION ||
3604             ref->entity->function.btk != bk_gnu_builtin_expect)
3605                 return false;
3606
3607         return true;
3608 }
3609
3610 static bool produces_mode_b(const expression_t *expression)
3611 {
3612         switch (expression->kind) {
3613         case EXPR_BINARY_EQUAL:
3614         case EXPR_BINARY_NOTEQUAL:
3615         case EXPR_BINARY_LESS:
3616         case EXPR_BINARY_LESSEQUAL:
3617         case EXPR_BINARY_GREATER:
3618         case EXPR_BINARY_GREATEREQUAL:
3619         case EXPR_BINARY_ISGREATER:
3620         case EXPR_BINARY_ISGREATEREQUAL:
3621         case EXPR_BINARY_ISLESS:
3622         case EXPR_BINARY_ISLESSEQUAL:
3623         case EXPR_BINARY_ISLESSGREATER:
3624         case EXPR_BINARY_ISUNORDERED:
3625         case EXPR_UNARY_NOT:
3626                 return true;
3627
3628         case EXPR_CALL:
3629                 if (is_builtin_expect(expression)) {
3630                         expression_t *argument = expression->call.arguments->expression;
3631                         return produces_mode_b(argument);
3632                 }
3633                 return false;
3634         case EXPR_BINARY_COMMA:
3635                 return produces_mode_b(expression->binary.right);
3636
3637         default:
3638                 return false;
3639         }
3640 }
3641
3642 static ir_node *expression_to_firm(const expression_t *expression)
3643 {
3644         if (!produces_mode_b(expression)) {
3645                 ir_node *res = _expression_to_firm(expression);
3646                 assert(res == NULL || get_irn_mode(res) != mode_b);
3647                 return res;
3648         }
3649
3650         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3651                 bool const constant_folding_old = constant_folding;
3652                 constant_folding = true;
3653                 ir_node *res  = _expression_to_firm(expression);
3654                 constant_folding = constant_folding_old;
3655                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3656                 assert(is_Const(res));
3657                 return create_Const_from_bool(mode, !is_Const_null(res));
3658         }
3659
3660         /* we have to produce a 0/1 from the mode_b expression */
3661         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3662         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3663         return produce_condition_result(expression, mode, dbgi);
3664 }
3665
3666 /**
3667  * create a short-circuit expression evaluation that tries to construct
3668  * efficient control flow structures for &&, || and ! expressions
3669  */
3670 static ir_node *create_condition_evaluation(const expression_t *expression,
3671                                             ir_node *true_block,
3672                                             ir_node *false_block)
3673 {
3674         switch(expression->kind) {
3675         case EXPR_UNARY_NOT: {
3676                 const unary_expression_t *unary_expression = &expression->unary;
3677                 create_condition_evaluation(unary_expression->value, false_block,
3678                                             true_block);
3679                 return NULL;
3680         }
3681         case EXPR_BINARY_LOGICAL_AND: {
3682                 const binary_expression_t *binary_expression = &expression->binary;
3683
3684                 ir_node *extra_block = new_immBlock();
3685                 create_condition_evaluation(binary_expression->left, extra_block,
3686                                             false_block);
3687                 mature_immBlock(extra_block);
3688                 set_cur_block(extra_block);
3689                 create_condition_evaluation(binary_expression->right, true_block,
3690                                             false_block);
3691                 return NULL;
3692         }
3693         case EXPR_BINARY_LOGICAL_OR: {
3694                 const binary_expression_t *binary_expression = &expression->binary;
3695
3696                 ir_node *extra_block = new_immBlock();
3697                 create_condition_evaluation(binary_expression->left, true_block,
3698                                             extra_block);
3699                 mature_immBlock(extra_block);
3700                 set_cur_block(extra_block);
3701                 create_condition_evaluation(binary_expression->right, true_block,
3702                                             false_block);
3703                 return NULL;
3704         }
3705         default:
3706                 break;
3707         }
3708
3709         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3710         ir_node  *cond_expr  = _expression_to_firm(expression);
3711         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3712         ir_node  *cond       = new_d_Cond(dbgi, condition);
3713         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3714         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3715
3716         /* set branch prediction info based on __builtin_expect */
3717         if (is_builtin_expect(expression) && is_Cond(cond)) {
3718                 call_argument_t *argument = expression->call.arguments->next;
3719                 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3720                         bool               const cnst = fold_constant_to_bool(argument->expression);
3721                         cond_jmp_predicate const pred = cnst ? COND_JMP_PRED_TRUE : COND_JMP_PRED_FALSE;
3722                         set_Cond_jmp_pred(cond, pred);
3723                 }
3724         }
3725
3726         add_immBlock_pred(true_block, true_proj);
3727         add_immBlock_pred(false_block, false_proj);
3728
3729         set_unreachable_now();
3730         return cond_expr;
3731 }
3732
3733 static void create_variable_entity(entity_t *variable,
3734                                    declaration_kind_t declaration_kind,
3735                                    ir_type *parent_type)
3736 {
3737         assert(variable->kind == ENTITY_VARIABLE);
3738         type_t    *type = skip_typeref(variable->declaration.type);
3739
3740         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3741         ir_type   *const irtype    = get_ir_type(type);
3742         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3743         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3744         unsigned         alignment = variable->declaration.alignment;
3745
3746         set_entity_alignment(irentity, alignment);
3747
3748         handle_decl_modifiers(irentity, variable);
3749
3750         variable->declaration.kind  = (unsigned char) declaration_kind;
3751         variable->variable.v.entity = irentity;
3752         set_entity_ld_ident(irentity, create_ld_ident(variable));
3753
3754         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3755                 set_entity_volatility(irentity, volatility_is_volatile);
3756         }
3757 }
3758
3759
3760 typedef struct type_path_entry_t type_path_entry_t;
3761 struct type_path_entry_t {
3762         type_t           *type;
3763         ir_initializer_t *initializer;
3764         size_t            index;
3765         entity_t         *compound_entry;
3766 };
3767
3768 typedef struct type_path_t type_path_t;
3769 struct type_path_t {
3770         type_path_entry_t *path;
3771         type_t            *top_type;
3772         bool               invalid;
3773 };
3774
3775 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3776 {
3777         size_t len = ARR_LEN(path->path);
3778
3779         for (size_t i = 0; i < len; ++i) {
3780                 const type_path_entry_t *entry = & path->path[i];
3781
3782                 type_t *type = skip_typeref(entry->type);
3783                 if (is_type_compound(type)) {
3784                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3785                 } else if (is_type_array(type)) {
3786                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3787                 } else {
3788                         fprintf(stderr, "-INVALID-");
3789                 }
3790         }
3791         fprintf(stderr, "  (");
3792         print_type(path->top_type);
3793         fprintf(stderr, ")");
3794 }
3795
3796 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3797 {
3798         size_t len = ARR_LEN(path->path);
3799         assert(len > 0);
3800         return & path->path[len-1];
3801 }
3802
3803 static type_path_entry_t *append_to_type_path(type_path_t *path)
3804 {
3805         size_t len = ARR_LEN(path->path);
3806         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3807
3808         type_path_entry_t *result = & path->path[len];
3809         memset(result, 0, sizeof(result[0]));
3810         return result;
3811 }
3812
3813 static size_t get_compound_member_count(const compound_type_t *type)
3814 {
3815         compound_t *compound  = type->compound;
3816         size_t      n_members = 0;
3817         entity_t   *member    = compound->members.entities;
3818         for ( ; member != NULL; member = member->base.next) {
3819                 ++n_members;
3820         }
3821
3822         return n_members;
3823 }
3824
3825 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3826 {
3827         type_t *orig_top_type = path->top_type;
3828         type_t *top_type      = skip_typeref(orig_top_type);
3829
3830         assert(is_type_compound(top_type) || is_type_array(top_type));
3831
3832         if (ARR_LEN(path->path) == 0) {
3833                 return NULL;
3834         } else {
3835                 type_path_entry_t *top         = get_type_path_top(path);
3836                 ir_initializer_t  *initializer = top->initializer;
3837                 return get_initializer_compound_value(initializer, top->index);
3838         }
3839 }
3840
3841 static void descend_into_subtype(type_path_t *path)
3842 {
3843         type_t *orig_top_type = path->top_type;
3844         type_t *top_type      = skip_typeref(orig_top_type);
3845
3846         assert(is_type_compound(top_type) || is_type_array(top_type));
3847
3848         ir_initializer_t *initializer = get_initializer_entry(path);
3849
3850         type_path_entry_t *top = append_to_type_path(path);
3851         top->type              = top_type;
3852
3853         size_t len;
3854
3855         if (is_type_compound(top_type)) {
3856                 compound_t *compound = top_type->compound.compound;
3857                 entity_t   *entry    = compound->members.entities;
3858
3859                 top->compound_entry = entry;
3860                 top->index          = 0;
3861                 len                 = get_compound_member_count(&top_type->compound);
3862                 if (entry != NULL) {
3863                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3864                         path->top_type = entry->declaration.type;
3865                 }
3866         } else {
3867                 assert(is_type_array(top_type));
3868                 assert(top_type->array.size > 0);
3869
3870                 top->index     = 0;
3871                 path->top_type = top_type->array.element_type;
3872                 len            = top_type->array.size;
3873         }
3874         if (initializer == NULL
3875                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3876                 initializer = create_initializer_compound(len);
3877                 /* we have to set the entry at the 2nd latest path entry... */
3878                 size_t path_len = ARR_LEN(path->path);
3879                 assert(path_len >= 1);
3880                 if (path_len > 1) {
3881                         type_path_entry_t *entry        = & path->path[path_len-2];
3882                         ir_initializer_t  *tinitializer = entry->initializer;
3883                         set_initializer_compound_value(tinitializer, entry->index,
3884                                                        initializer);
3885                 }
3886         }
3887         top->initializer = initializer;
3888 }
3889
3890 static void ascend_from_subtype(type_path_t *path)
3891 {
3892         type_path_entry_t *top = get_type_path_top(path);
3893
3894         path->top_type = top->type;
3895
3896         size_t len = ARR_LEN(path->path);
3897         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3898 }
3899
3900 static void walk_designator(type_path_t *path, const designator_t *designator)
3901 {
3902         /* designators start at current object type */
3903         ARR_RESIZE(type_path_entry_t, path->path, 1);
3904
3905         for ( ; designator != NULL; designator = designator->next) {
3906                 type_path_entry_t *top         = get_type_path_top(path);
3907                 type_t            *orig_type   = top->type;
3908                 type_t            *type        = skip_typeref(orig_type);
3909
3910                 if (designator->symbol != NULL) {
3911                         assert(is_type_compound(type));
3912                         size_t    index  = 0;
3913                         symbol_t *symbol = designator->symbol;
3914
3915                         compound_t *compound = type->compound.compound;
3916                         entity_t   *iter     = compound->members.entities;
3917                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3918                                 if (iter->base.symbol == symbol) {
3919                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3920                                         break;
3921                                 }
3922                         }
3923                         assert(iter != NULL);
3924
3925                         /* revert previous initialisations of other union elements */
3926                         if (type->kind == TYPE_COMPOUND_UNION) {
3927                                 ir_initializer_t *initializer = top->initializer;
3928                                 if (initializer != NULL
3929                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3930                                         /* are we writing to a new element? */
3931                                         ir_initializer_t *oldi
3932                                                 = get_initializer_compound_value(initializer, index);
3933                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3934                                                 /* clear initializer */
3935                                                 size_t len
3936                                                         = get_initializer_compound_n_entries(initializer);
3937                                                 ir_initializer_t *nulli = get_initializer_null();
3938                                                 for (size_t i = 0; i < len; ++i) {
3939                                                         set_initializer_compound_value(initializer, i,
3940                                                                                        nulli);
3941                                                 }
3942                                         }
3943                                 }
3944                         }
3945
3946                         top->type           = orig_type;
3947                         top->compound_entry = iter;
3948                         top->index          = index;
3949                         orig_type           = iter->declaration.type;
3950                 } else {
3951                         expression_t *array_index = designator->array_index;
3952                         assert(designator->array_index != NULL);
3953                         assert(is_type_array(type));
3954
3955                         long index = fold_constant_to_int(array_index);
3956                         assert(index >= 0);
3957 #ifndef NDEBUG
3958                         if (type->array.size_constant) {
3959                                 long array_size = type->array.size;
3960                                 assert(index < array_size);
3961                         }
3962 #endif
3963
3964                         top->type  = orig_type;
3965                         top->index = (size_t) index;
3966                         orig_type  = type->array.element_type;
3967                 }
3968                 path->top_type = orig_type;
3969
3970                 if (designator->next != NULL) {
3971                         descend_into_subtype(path);
3972                 }
3973         }
3974
3975         path->invalid  = false;
3976 }
3977
3978 static void advance_current_object(type_path_t *path)
3979 {
3980         if (path->invalid) {
3981                 /* TODO: handle this... */
3982                 panic("invalid initializer in ast2firm (excessive elements)");
3983         }
3984
3985         type_path_entry_t *top = get_type_path_top(path);
3986
3987         type_t *type = skip_typeref(top->type);
3988         if (is_type_union(type)) {
3989                 /* only the first element is initialized in unions */
3990                 top->compound_entry = NULL;
3991         } else if (is_type_struct(type)) {
3992                 entity_t *entry = top->compound_entry;
3993
3994                 top->index++;
3995                 entry               = entry->base.next;
3996                 top->compound_entry = entry;
3997                 if (entry != NULL) {
3998                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3999                         path->top_type = entry->declaration.type;
4000                         return;
4001                 }
4002         } else {
4003                 assert(is_type_array(type));
4004
4005                 top->index++;
4006                 if (!type->array.size_constant || top->index < type->array.size) {
4007                         return;
4008                 }
4009         }
4010
4011         /* we're past the last member of the current sub-aggregate, try if we
4012          * can ascend in the type hierarchy and continue with another subobject */
4013         size_t len = ARR_LEN(path->path);
4014
4015         if (len > 1) {
4016                 ascend_from_subtype(path);
4017                 advance_current_object(path);
4018         } else {
4019                 path->invalid = true;
4020         }
4021 }
4022
4023
4024 static ir_initializer_t *create_ir_initializer(
4025                 const initializer_t *initializer, type_t *type);
4026
4027 static ir_initializer_t *create_ir_initializer_value(
4028                 const initializer_value_t *initializer)
4029 {
4030         if (is_type_compound(initializer->value->base.type)) {
4031                 panic("initializer creation for compounds not implemented yet");
4032         }
4033         type_t       *type = initializer->value->base.type;
4034         expression_t *expr = initializer->value;
4035         if (initializer_use_bitfield_basetype) {
4036                 type_t *skipped = skip_typeref(type);
4037                 if (skipped->kind == TYPE_BITFIELD) {
4038                         /* remove the bitfield cast... */
4039                         assert(expr->kind == EXPR_UNARY_CAST && expr->base.implicit);
4040                         expr = expr->unary.value;
4041                         type = skipped->bitfield.base_type;
4042                 }
4043         }
4044         ir_node *value = expression_to_firm(expr);
4045         ir_mode *mode  = get_ir_mode_storage(type);
4046         value          = create_conv(NULL, value, mode);
4047         return create_initializer_const(value);
4048 }
4049
4050 /** test wether type can be initialized by a string constant */
4051 static bool is_string_type(type_t *type)
4052 {
4053         type_t *inner;
4054         if (is_type_pointer(type)) {
4055                 inner = skip_typeref(type->pointer.points_to);
4056         } else if(is_type_array(type)) {
4057                 inner = skip_typeref(type->array.element_type);
4058         } else {
4059                 return false;
4060         }
4061
4062         return is_type_integer(inner);
4063 }
4064
4065 static ir_initializer_t *create_ir_initializer_list(
4066                 const initializer_list_t *initializer, type_t *type)
4067 {
4068         type_path_t path;
4069         memset(&path, 0, sizeof(path));
4070         path.top_type = type;
4071         path.path     = NEW_ARR_F(type_path_entry_t, 0);
4072
4073         descend_into_subtype(&path);
4074
4075         for (size_t i = 0; i < initializer->len; ++i) {
4076                 const initializer_t *sub_initializer = initializer->initializers[i];
4077
4078                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
4079                         walk_designator(&path, sub_initializer->designator.designator);
4080                         continue;
4081                 }
4082
4083                 if (sub_initializer->kind == INITIALIZER_VALUE) {
4084                         /* we might have to descend into types until we're at a scalar
4085                          * type */
4086                         while(true) {
4087                                 type_t *orig_top_type = path.top_type;
4088                                 type_t *top_type      = skip_typeref(orig_top_type);
4089
4090                                 if (is_type_scalar(top_type))
4091                                         break;
4092                                 descend_into_subtype(&path);
4093                         }
4094                 } else if (sub_initializer->kind == INITIALIZER_STRING
4095                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
4096                         /* we might have to descend into types until we're at a scalar
4097                          * type */
4098                         while (true) {
4099                                 type_t *orig_top_type = path.top_type;
4100                                 type_t *top_type      = skip_typeref(orig_top_type);
4101
4102                                 if (is_string_type(top_type))
4103                                         break;
4104                                 descend_into_subtype(&path);
4105                         }
4106                 }
4107
4108                 ir_initializer_t *sub_irinitializer
4109                         = create_ir_initializer(sub_initializer, path.top_type);
4110
4111                 size_t path_len = ARR_LEN(path.path);
4112                 assert(path_len >= 1);
4113                 type_path_entry_t *entry        = & path.path[path_len-1];
4114                 ir_initializer_t  *tinitializer = entry->initializer;
4115                 set_initializer_compound_value(tinitializer, entry->index,
4116                                                sub_irinitializer);
4117
4118                 advance_current_object(&path);
4119         }
4120
4121         assert(ARR_LEN(path.path) >= 1);
4122         ir_initializer_t *result = path.path[0].initializer;
4123         DEL_ARR_F(path.path);
4124
4125         return result;
4126 }
4127
4128 static ir_initializer_t *create_ir_initializer_string(
4129                 const initializer_string_t *initializer, type_t *type)
4130 {
4131         type = skip_typeref(type);
4132
4133         size_t            string_len    = initializer->string.size;
4134         assert(type->kind == TYPE_ARRAY);
4135         assert(type->array.size_constant);
4136         size_t            len           = type->array.size;
4137         ir_initializer_t *irinitializer = create_initializer_compound(len);
4138
4139         const char *string = initializer->string.begin;
4140         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
4141
4142         for (size_t i = 0; i < len; ++i) {
4143                 char c = 0;
4144                 if (i < string_len)
4145                         c = string[i];
4146
4147                 ir_tarval        *tv = new_tarval_from_long(c, mode);
4148                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4149
4150                 set_initializer_compound_value(irinitializer, i, char_initializer);
4151         }
4152
4153         return irinitializer;
4154 }
4155
4156 static ir_initializer_t *create_ir_initializer_wide_string(
4157                 const initializer_wide_string_t *initializer, type_t *type)
4158 {
4159         assert(type->kind == TYPE_ARRAY);
4160         assert(type->array.size_constant);
4161         size_t            len           = type->array.size;
4162         size_t            string_len    = wstrlen(&initializer->string);
4163         ir_initializer_t *irinitializer = create_initializer_compound(len);
4164
4165         const char *p    = initializer->string.begin;
4166         ir_mode    *mode = get_type_mode(ir_type_wchar_t);
4167
4168         for (size_t i = 0; i < len; ++i) {
4169                 utf32 c = 0;
4170                 if (i < string_len) {
4171                         c = read_utf8_char(&p);
4172                 }
4173                 ir_tarval *tv = new_tarval_from_long(c, mode);
4174                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4175
4176                 set_initializer_compound_value(irinitializer, i, char_initializer);
4177         }
4178
4179         return irinitializer;
4180 }
4181
4182 static ir_initializer_t *create_ir_initializer(
4183                 const initializer_t *initializer, type_t *type)
4184 {
4185         switch(initializer->kind) {
4186                 case INITIALIZER_STRING:
4187                         return create_ir_initializer_string(&initializer->string, type);
4188
4189                 case INITIALIZER_WIDE_STRING:
4190                         return create_ir_initializer_wide_string(&initializer->wide_string,
4191                                                                  type);
4192
4193                 case INITIALIZER_LIST:
4194                         return create_ir_initializer_list(&initializer->list, type);
4195
4196                 case INITIALIZER_VALUE:
4197                         return create_ir_initializer_value(&initializer->value);
4198
4199                 case INITIALIZER_DESIGNATOR:
4200                         panic("unexpected designator initializer found");
4201         }
4202         panic("unknown initializer");
4203 }
4204
4205 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
4206  *  are elements [...] the remainder of the aggregate shall be initialized
4207  *  implicitly the same as objects that have static storage duration. */
4208 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4209                 ir_node *base_addr)
4210 {
4211         /* for unions we must NOT do anything for null initializers */
4212         ir_type *owner = get_entity_owner(entity);
4213         if (is_Union_type(owner)) {
4214                 return;
4215         }
4216
4217         ir_type *ent_type = get_entity_type(entity);
4218         /* create sub-initializers for a compound type */
4219         if (is_compound_type(ent_type)) {
4220                 unsigned n_members = get_compound_n_members(ent_type);
4221                 for (unsigned n = 0; n < n_members; ++n) {
4222                         ir_entity *member = get_compound_member(ent_type, n);
4223                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4224                                                                 member);
4225                         create_dynamic_null_initializer(member, dbgi, addr);
4226                 }
4227                 return;
4228         }
4229         if (is_Array_type(ent_type)) {
4230                 assert(has_array_upper_bound(ent_type, 0));
4231                 long n = get_array_upper_bound_int(ent_type, 0);
4232                 for (long i = 0; i < n; ++i) {
4233                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4234                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4235                         ir_node   *in[1]    = { cnst };
4236                         ir_entity *arrent   = get_array_element_entity(ent_type);
4237                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4238                                                         arrent);
4239                         create_dynamic_null_initializer(arrent, dbgi, addr);
4240                 }
4241                 return;
4242         }
4243
4244         ir_mode *value_mode = get_type_mode(ent_type);
4245         ir_node *node       = new_Const(get_mode_null(value_mode));
4246
4247         /* is it a bitfield type? */
4248         if (is_Primitive_type(ent_type) &&
4249                         get_primitive_base_type(ent_type) != NULL) {
4250                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4251                 return;
4252         }
4253
4254         ir_node *mem    = get_store();
4255         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4256         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4257         set_store(proj_m);
4258 }
4259
4260 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4261                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4262 {
4263         switch(get_initializer_kind(initializer)) {
4264         case IR_INITIALIZER_NULL:
4265                 create_dynamic_null_initializer(entity, dbgi, base_addr);
4266                 return;
4267         case IR_INITIALIZER_CONST: {
4268                 ir_node *node     = get_initializer_const_value(initializer);
4269                 ir_type *ent_type = get_entity_type(entity);
4270
4271                 /* is it a bitfield type? */
4272                 if (is_Primitive_type(ent_type) &&
4273                                 get_primitive_base_type(ent_type) != NULL) {
4274                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4275                         return;
4276                 }
4277
4278                 assert(get_type_mode(type) == get_irn_mode(node));
4279                 ir_node *mem    = get_store();
4280                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4281                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4282                 set_store(proj_m);
4283                 return;
4284         }
4285         case IR_INITIALIZER_TARVAL: {
4286                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
4287                 ir_node   *cnst     = new_d_Const(dbgi, tv);
4288                 ir_type   *ent_type = get_entity_type(entity);
4289
4290                 /* is it a bitfield type? */
4291                 if (is_Primitive_type(ent_type) &&
4292                                 get_primitive_base_type(ent_type) != NULL) {
4293                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
4294                         return;
4295                 }
4296
4297                 assert(get_type_mode(type) == get_tarval_mode(tv));
4298                 ir_node *mem    = get_store();
4299                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4300                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4301                 set_store(proj_m);
4302                 return;
4303         }
4304         case IR_INITIALIZER_COMPOUND: {
4305                 assert(is_compound_type(type) || is_Array_type(type));
4306                 int n_members;
4307                 if (is_Array_type(type)) {
4308                         assert(has_array_upper_bound(type, 0));
4309                         n_members = get_array_upper_bound_int(type, 0);
4310                 } else {
4311                         n_members = get_compound_n_members(type);
4312                 }
4313
4314                 if (get_initializer_compound_n_entries(initializer)
4315                                 != (unsigned) n_members)
4316                         panic("initializer doesn't match compound type");
4317
4318                 for (int i = 0; i < n_members; ++i) {
4319                         ir_node   *addr;
4320                         ir_type   *irtype;
4321                         ir_entity *sub_entity;
4322                         if (is_Array_type(type)) {
4323                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4324                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4325                                 ir_node   *in[1]    = { cnst };
4326                                 irtype     = get_array_element_type(type);
4327                                 sub_entity = get_array_element_entity(type);
4328                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4329                                                        sub_entity);
4330                         } else {
4331                                 sub_entity = get_compound_member(type, i);
4332                                 irtype     = get_entity_type(sub_entity);
4333                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4334                                                              sub_entity);
4335                         }
4336
4337                         ir_initializer_t *sub_init
4338                                 = get_initializer_compound_value(initializer, i);
4339
4340                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4341                                                        addr);
4342                 }
4343                 return;
4344         }
4345         }
4346
4347         panic("invalid IR_INITIALIZER found");
4348 }
4349
4350 static void create_dynamic_initializer(ir_initializer_t *initializer,
4351                 dbg_info *dbgi, ir_entity *entity)
4352 {
4353         ir_node *frame     = get_irg_frame(current_ir_graph);
4354         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4355         ir_type *type      = get_entity_type(entity);
4356
4357         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4358 }
4359
4360 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4361                                      ir_entity *entity, type_t *type)
4362 {
4363         ir_node *memory = get_store();
4364         ir_node *nomem  = new_NoMem();
4365         ir_node *frame  = get_irg_frame(current_ir_graph);
4366         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4367
4368         if (initializer->kind == INITIALIZER_VALUE) {
4369                 initializer_value_t *initializer_value = &initializer->value;
4370
4371                 ir_node *value = expression_to_firm(initializer_value->value);
4372                 type = skip_typeref(type);
4373                 assign_value(dbgi, addr, type, value);
4374                 return;
4375         }
4376
4377         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4378                 bool old_initializer_use_bitfield_basetype
4379                         = initializer_use_bitfield_basetype;
4380                 initializer_use_bitfield_basetype = true;
4381                 ir_initializer_t *irinitializer
4382                         = create_ir_initializer(initializer, type);
4383                 initializer_use_bitfield_basetype
4384                         = old_initializer_use_bitfield_basetype;
4385
4386                 create_dynamic_initializer(irinitializer, dbgi, entity);
4387                 return;
4388         }
4389
4390         /* create the ir_initializer */
4391         ir_graph *const old_current_ir_graph = current_ir_graph;
4392         current_ir_graph = get_const_code_irg();
4393
4394         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4395
4396         assert(current_ir_graph == get_const_code_irg());
4397         current_ir_graph = old_current_ir_graph;
4398
4399         /* create a "template" entity which is copied to the entity on the stack */
4400         ident     *const id          = id_unique("initializer.%u");
4401         ir_type   *const irtype      = get_ir_type(type);
4402         ir_type   *const global_type = get_glob_type();
4403         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4404         set_entity_ld_ident(init_entity, id);
4405
4406         set_entity_visibility(init_entity, ir_visibility_private);
4407         add_entity_linkage(init_entity, IR_LINKAGE_CONSTANT);
4408
4409         set_entity_initializer(init_entity, irinitializer);
4410
4411         ir_node *const src_addr = create_symconst(dbgi, init_entity);
4412         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4413
4414         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4415         set_store(copyb_mem);
4416 }
4417
4418 static void create_initializer_local_variable_entity(entity_t *entity)
4419 {
4420         assert(entity->kind == ENTITY_VARIABLE);
4421         initializer_t *initializer = entity->variable.initializer;
4422         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4423         ir_entity     *irentity    = entity->variable.v.entity;
4424         type_t        *type        = entity->declaration.type;
4425
4426         create_local_initializer(initializer, dbgi, irentity, type);
4427 }
4428
4429 static void create_variable_initializer(entity_t *entity)
4430 {
4431         assert(entity->kind == ENTITY_VARIABLE);
4432         initializer_t *initializer = entity->variable.initializer;
4433         if (initializer == NULL)
4434                 return;
4435
4436         declaration_kind_t declaration_kind
4437                 = (declaration_kind_t) entity->declaration.kind;
4438         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4439                 create_initializer_local_variable_entity(entity);
4440                 return;
4441         }
4442
4443         type_t            *type = entity->declaration.type;
4444         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4445
4446         if (initializer->kind == INITIALIZER_VALUE) {
4447                 initializer_value_t *initializer_value = &initializer->value;
4448                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4449
4450                 ir_node *value = expression_to_firm(initializer_value->value);
4451
4452                 type_t  *init_type = initializer_value->value->base.type;
4453                 ir_mode *mode      = get_ir_mode_storage(init_type);
4454                 value = create_conv(dbgi, value, mode);
4455                 value = do_strict_conv(dbgi, value);
4456
4457                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4458                         set_value(entity->variable.v.value_number, value);
4459                 } else {
4460                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4461
4462                         ir_entity *irentity = entity->variable.v.entity;
4463
4464                         if (tq & TYPE_QUALIFIER_CONST
4465                                         && get_entity_owner(irentity) != get_tls_type()) {
4466                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4467                         }
4468                         set_atomic_ent_value(irentity, value);
4469                 }
4470         } else {
4471                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4472                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4473
4474                 ir_entity        *irentity        = entity->variable.v.entity;
4475                 ir_initializer_t *irinitializer
4476                         = create_ir_initializer(initializer, type);
4477
4478                 if (tq & TYPE_QUALIFIER_CONST) {
4479                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4480                 }
4481                 set_entity_initializer(irentity, irinitializer);
4482         }
4483 }
4484
4485 static void create_variable_length_array(entity_t *entity)
4486 {
4487         assert(entity->kind == ENTITY_VARIABLE);
4488         assert(entity->variable.initializer == NULL);
4489
4490         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4491         entity->variable.v.vla_base = NULL;
4492
4493         /* TODO: record VLA somewhere so we create the free node when we leave
4494          * it's scope */
4495 }
4496
4497 static void allocate_variable_length_array(entity_t *entity)
4498 {
4499         assert(entity->kind == ENTITY_VARIABLE);
4500         assert(entity->variable.initializer == NULL);
4501         assert(currently_reachable());
4502
4503         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4504         type_t   *type      = entity->declaration.type;
4505         ir_type  *el_type   = get_ir_type(type->array.element_type);
4506
4507         /* make sure size_node is calculated */
4508         get_type_size_node(type);
4509         ir_node  *elems = type->array.size_node;
4510         ir_node  *mem   = get_store();
4511         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4512
4513         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4514         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4515         set_store(proj_m);
4516
4517         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4518         entity->variable.v.vla_base = addr;
4519 }
4520
4521 /**
4522  * Creates a Firm local variable from a declaration.
4523  */
4524 static void create_local_variable(entity_t *entity)
4525 {
4526         assert(entity->kind == ENTITY_VARIABLE);
4527         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4528
4529         bool needs_entity = entity->variable.address_taken;
4530         type_t *type = skip_typeref(entity->declaration.type);
4531
4532         /* is it a variable length array? */
4533         if (is_type_array(type) && !type->array.size_constant) {
4534                 create_variable_length_array(entity);
4535                 return;
4536         } else if (is_type_array(type) || is_type_compound(type)) {
4537                 needs_entity = true;
4538         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4539                 needs_entity = true;
4540         }
4541
4542         if (needs_entity) {
4543                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4544                 create_variable_entity(entity,
4545                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4546                                        frame_type);
4547         } else {
4548                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4549                 entity->variable.v.value_number = next_value_number_function;
4550                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4551                                         entity);
4552                 ++next_value_number_function;
4553         }
4554 }
4555
4556 static void create_local_static_variable(entity_t *entity)
4557 {
4558         assert(entity->kind == ENTITY_VARIABLE);
4559         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4560
4561         type_t   *type           = skip_typeref(entity->declaration.type);
4562         ir_type  *const var_type = entity->variable.thread_local ?
4563                 get_tls_type() : get_glob_type();
4564         ir_type  *const irtype   = get_ir_type(type);
4565         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4566
4567         size_t l = strlen(entity->base.symbol->string);
4568         char   buf[l + sizeof(".%u")];
4569         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4570         ident     *const id       = id_unique(buf);
4571         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4572
4573         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4574                 set_entity_volatility(irentity, volatility_is_volatile);
4575         }
4576
4577         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4578         entity->variable.v.entity = irentity;
4579
4580         set_entity_ld_ident(irentity, id);
4581         set_entity_visibility(irentity, ir_visibility_local);
4582
4583         ir_graph *const old_current_ir_graph = current_ir_graph;
4584         current_ir_graph = get_const_code_irg();
4585
4586         create_variable_initializer(entity);
4587
4588         assert(current_ir_graph == get_const_code_irg());
4589         current_ir_graph = old_current_ir_graph;
4590 }
4591
4592
4593
4594 static void return_statement_to_firm(return_statement_t *statement)
4595 {
4596         if (!currently_reachable())
4597                 return;
4598
4599         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4600         type_t   *type        = current_function_entity->declaration.type;
4601         ir_type  *func_irtype = get_ir_type(type);
4602
4603         ir_node *in[1];
4604         int      in_len;
4605         if (get_method_n_ress(func_irtype) > 0) {
4606                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4607
4608                 if (statement->value != NULL) {
4609                         ir_node *node = expression_to_firm(statement->value);
4610                         if (!is_compound_type(res_type)) {
4611                                 type_t  *ret_value_type = statement->value->base.type;
4612                                 ir_mode *mode           = get_ir_mode_storage(ret_value_type);
4613                                 node                    = create_conv(dbgi, node, mode);
4614                                 node                    = do_strict_conv(dbgi, node);
4615                         }
4616                         in[0] = node;
4617                 } else {
4618                         ir_mode *mode;
4619                         if (is_compound_type(res_type)) {
4620                                 mode = mode_P_data;
4621                         } else {
4622                                 mode = get_type_mode(res_type);
4623                         }
4624                         in[0] = new_Unknown(mode);
4625                 }
4626                 in_len = 1;
4627         } else {
4628                 /* build return_value for its side effects */
4629                 if (statement->value != NULL) {
4630                         expression_to_firm(statement->value);
4631                 }
4632                 in_len = 0;
4633         }
4634
4635         ir_node  *store = get_store();
4636         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4637
4638         ir_node *end_block = get_irg_end_block(current_ir_graph);
4639         add_immBlock_pred(end_block, ret);
4640
4641         set_unreachable_now();
4642 }
4643
4644 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4645 {
4646         if (!currently_reachable())
4647                 return NULL;
4648
4649         return expression_to_firm(statement->expression);
4650 }
4651
4652 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4653 {
4654         entity_t *entity = compound->scope.entities;
4655         for ( ; entity != NULL; entity = entity->base.next) {
4656                 if (!is_declaration(entity))
4657                         continue;
4658
4659                 create_local_declaration(entity);
4660         }
4661
4662         ir_node     *result    = NULL;
4663         statement_t *statement = compound->statements;
4664         for ( ; statement != NULL; statement = statement->base.next) {
4665                 if (statement->base.next == NULL
4666                                 && statement->kind == STATEMENT_EXPRESSION) {
4667                         result = expression_statement_to_firm(
4668                                         &statement->expression);
4669                         break;
4670                 }
4671                 statement_to_firm(statement);
4672         }
4673
4674         return result;
4675 }
4676
4677 static void create_global_variable(entity_t *entity)
4678 {
4679         ir_linkage    linkage    = IR_LINKAGE_DEFAULT;
4680         ir_visibility visibility = ir_visibility_default;
4681         ir_entity    *irentity;
4682         assert(entity->kind == ENTITY_VARIABLE);
4683
4684         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4685         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4686         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4687         case STORAGE_CLASS_NONE:
4688                 visibility = ir_visibility_default;
4689                 /* uninitialized globals get merged in C */
4690                 if (entity->variable.initializer == NULL)
4691                         linkage |= IR_LINKAGE_MERGE;
4692                 break;
4693         case STORAGE_CLASS_TYPEDEF:
4694         case STORAGE_CLASS_AUTO:
4695         case STORAGE_CLASS_REGISTER:
4696                 panic("invalid storage class for global var");
4697         }
4698
4699         ir_type *var_type = get_glob_type();
4700         if (entity->variable.thread_local) {
4701                 var_type = get_tls_type();
4702                 /* LINKAGE_MERGE not supported by current linkers */
4703                 linkage &= ~IR_LINKAGE_MERGE;
4704         }
4705         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4706         irentity = entity->variable.v.entity;
4707         add_entity_linkage(irentity, linkage);
4708         set_entity_visibility(irentity, visibility);
4709 }
4710
4711 static void create_local_declaration(entity_t *entity)
4712 {
4713         assert(is_declaration(entity));
4714
4715         /* construct type */
4716         (void) get_ir_type(entity->declaration.type);
4717         if (entity->base.symbol == NULL) {
4718                 return;
4719         }
4720
4721         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4722         case STORAGE_CLASS_STATIC:
4723                 if (entity->kind == ENTITY_FUNCTION) {
4724                         (void)get_function_entity(entity, NULL);
4725                 } else {
4726                         create_local_static_variable(entity);
4727                 }
4728                 return;
4729         case STORAGE_CLASS_EXTERN:
4730                 if (entity->kind == ENTITY_FUNCTION) {
4731                         assert(entity->function.statement == NULL);
4732                         (void)get_function_entity(entity, NULL);
4733                 } else {
4734                         create_global_variable(entity);
4735                         create_variable_initializer(entity);
4736                 }
4737                 return;
4738         case STORAGE_CLASS_NONE:
4739         case STORAGE_CLASS_AUTO:
4740         case STORAGE_CLASS_REGISTER:
4741                 if (entity->kind == ENTITY_FUNCTION) {
4742                         if (entity->function.statement != NULL) {
4743                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4744                                 (void)get_function_entity(entity, owner);
4745                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4746                                 enqueue_inner_function(entity);
4747                         } else {
4748                                 (void)get_function_entity(entity, NULL);
4749                         }
4750                 } else {
4751                         create_local_variable(entity);
4752                 }
4753                 return;
4754         case STORAGE_CLASS_TYPEDEF:
4755                 break;
4756         }
4757         panic("invalid storage class found");
4758 }
4759
4760 static void initialize_local_declaration(entity_t *entity)
4761 {
4762         if (entity->base.symbol == NULL)
4763                 return;
4764
4765         // no need to emit code in dead blocks
4766         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4767                         && !currently_reachable())
4768                 return;
4769
4770         switch ((declaration_kind_t) entity->declaration.kind) {
4771         case DECLARATION_KIND_LOCAL_VARIABLE:
4772         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4773                 create_variable_initializer(entity);
4774                 return;
4775
4776         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4777                 allocate_variable_length_array(entity);
4778                 return;
4779
4780         case DECLARATION_KIND_COMPOUND_MEMBER:
4781         case DECLARATION_KIND_GLOBAL_VARIABLE:
4782         case DECLARATION_KIND_FUNCTION:
4783         case DECLARATION_KIND_INNER_FUNCTION:
4784                 return;
4785
4786         case DECLARATION_KIND_PARAMETER:
4787         case DECLARATION_KIND_PARAMETER_ENTITY:
4788                 panic("can't initialize parameters");
4789
4790         case DECLARATION_KIND_UNKNOWN:
4791                 panic("can't initialize unknown declaration");
4792         }
4793         panic("invalid declaration kind");
4794 }
4795
4796 static void declaration_statement_to_firm(declaration_statement_t *statement)
4797 {
4798         entity_t *entity = statement->declarations_begin;
4799         if (entity == NULL)
4800                 return;
4801
4802         entity_t *const last = statement->declarations_end;
4803         for ( ;; entity = entity->base.next) {
4804                 if (is_declaration(entity)) {
4805                         initialize_local_declaration(entity);
4806                 } else if (entity->kind == ENTITY_TYPEDEF) {
4807                         /* §6.7.7:3  Any array size expressions associated with variable length
4808                          * array declarators are evaluated each time the declaration of the
4809                          * typedef name is reached in the order of execution. */
4810                         type_t *const type = skip_typeref(entity->typedefe.type);
4811                         if (is_type_array(type) && type->array.is_vla)
4812                                 get_vla_size(&type->array);
4813                 }
4814                 if (entity == last)
4815                         break;
4816         }
4817 }
4818
4819 static void if_statement_to_firm(if_statement_t *statement)
4820 {
4821         /* Create the condition. */
4822         ir_node *true_block  = NULL;
4823         ir_node *false_block = NULL;
4824         if (currently_reachable()) {
4825                 true_block  = new_immBlock();
4826                 false_block = new_immBlock();
4827                 create_condition_evaluation(statement->condition, true_block, false_block);
4828                 mature_immBlock(true_block);
4829         }
4830
4831         /* Create the false statement.
4832          * Handle false before true, so if no false statement is present, then the
4833          * empty false block is reused as fallthrough block. */
4834         ir_node *fallthrough_block = NULL;
4835         if (statement->false_statement != NULL) {
4836                 if (false_block != NULL) {
4837                         mature_immBlock(false_block);
4838                 }
4839                 set_cur_block(false_block);
4840                 statement_to_firm(statement->false_statement);
4841                 if (currently_reachable()) {
4842                         fallthrough_block = new_immBlock();
4843                         add_immBlock_pred(fallthrough_block, new_Jmp());
4844                 }
4845         } else {
4846                 fallthrough_block = false_block;
4847         }
4848
4849         /* Create the true statement. */
4850         set_cur_block(true_block);
4851         statement_to_firm(statement->true_statement);
4852         if (currently_reachable()) {
4853                 if (fallthrough_block == NULL) {
4854                         fallthrough_block = new_immBlock();
4855                 }
4856                 add_immBlock_pred(fallthrough_block, new_Jmp());
4857         }
4858
4859         /* Handle the block after the if-statement. */
4860         if (fallthrough_block != NULL) {
4861                 mature_immBlock(fallthrough_block);
4862         }
4863         set_cur_block(fallthrough_block);
4864 }
4865
4866 /* Create a jump node which jumps into target_block, if the current block is
4867  * reachable. */
4868 static void jump_if_reachable(ir_node *const target_block)
4869 {
4870         ir_node *const pred = currently_reachable() ? new_Jmp() : new_Bad(mode_X);
4871         add_immBlock_pred(target_block, pred);
4872 }
4873
4874 static void while_statement_to_firm(while_statement_t *statement)
4875 {
4876         /* Create the header block */
4877         ir_node *const header_block = new_immBlock();
4878         jump_if_reachable(header_block);
4879
4880         /* Create the condition. */
4881         ir_node      *      body_block;
4882         ir_node      *      false_block;
4883         expression_t *const cond = statement->condition;
4884         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4885                         fold_constant_to_bool(cond)) {
4886                 /* Shortcut for while (true). */
4887                 body_block  = header_block;
4888                 false_block = NULL;
4889
4890                 keep_alive(header_block);
4891                 keep_all_memory(header_block);
4892         } else {
4893                 body_block  = new_immBlock();
4894                 false_block = new_immBlock();
4895
4896                 set_cur_block(header_block);
4897                 create_condition_evaluation(cond, body_block, false_block);
4898                 mature_immBlock(body_block);
4899         }
4900
4901         ir_node *const old_continue_label = continue_label;
4902         ir_node *const old_break_label    = break_label;
4903         continue_label = header_block;
4904         break_label    = false_block;
4905
4906         /* Create the loop body. */
4907         set_cur_block(body_block);
4908         statement_to_firm(statement->body);
4909         jump_if_reachable(header_block);
4910
4911         mature_immBlock(header_block);
4912         assert(false_block == NULL || false_block == break_label);
4913         false_block = break_label;
4914         if (false_block != NULL) {
4915                 mature_immBlock(false_block);
4916         }
4917         set_cur_block(false_block);
4918
4919         assert(continue_label == header_block);
4920         continue_label = old_continue_label;
4921         break_label    = old_break_label;
4922 }
4923
4924 static ir_node *get_break_label(void)
4925 {
4926         if (break_label == NULL) {
4927                 break_label = new_immBlock();
4928         }
4929         return break_label;
4930 }
4931
4932 static void do_while_statement_to_firm(do_while_statement_t *statement)
4933 {
4934         /* create the header block */
4935         ir_node *header_block = new_immBlock();
4936
4937         /* the loop body */
4938         ir_node *body_block = new_immBlock();
4939         jump_if_reachable(body_block);
4940
4941         ir_node *old_continue_label = continue_label;
4942         ir_node *old_break_label    = break_label;
4943         continue_label              = header_block;
4944         break_label                 = NULL;
4945
4946         set_cur_block(body_block);
4947         statement_to_firm(statement->body);
4948         ir_node *const false_block = get_break_label();
4949
4950         assert(continue_label == header_block);
4951         continue_label = old_continue_label;
4952         break_label    = old_break_label;
4953
4954         jump_if_reachable(header_block);
4955
4956         /* create the condition */
4957         mature_immBlock(header_block);
4958         set_cur_block(header_block);
4959
4960         create_condition_evaluation(statement->condition, body_block, false_block);
4961         mature_immBlock(body_block);
4962         mature_immBlock(false_block);
4963
4964         set_cur_block(false_block);
4965 }
4966
4967 static void for_statement_to_firm(for_statement_t *statement)
4968 {
4969         /* create declarations */
4970         entity_t *entity = statement->scope.entities;
4971         for ( ; entity != NULL; entity = entity->base.next) {
4972                 if (!is_declaration(entity))
4973                         continue;
4974
4975                 create_local_declaration(entity);
4976         }
4977
4978         if (currently_reachable()) {
4979                 entity = statement->scope.entities;
4980                 for ( ; entity != NULL; entity = entity->base.next) {
4981                         if (!is_declaration(entity))
4982                                 continue;
4983
4984                         initialize_local_declaration(entity);
4985                 }
4986
4987                 if (statement->initialisation != NULL) {
4988                         expression_to_firm(statement->initialisation);
4989                 }
4990         }
4991
4992         /* Create the header block */
4993         ir_node *const header_block = new_immBlock();
4994         jump_if_reachable(header_block);
4995
4996         /* Create the condition. */
4997         ir_node *body_block;
4998         ir_node *false_block;
4999         if (statement->condition != NULL) {
5000                 body_block  = new_immBlock();
5001                 false_block = new_immBlock();
5002
5003                 set_cur_block(header_block);
5004                 create_condition_evaluation(statement->condition, body_block, false_block);
5005                 mature_immBlock(body_block);
5006         } else {
5007                 /* for-ever. */
5008                 body_block  = header_block;
5009                 false_block = NULL;
5010
5011                 keep_alive(header_block);
5012                 keep_all_memory(header_block);
5013         }
5014
5015         /* Create the step block, if necessary. */
5016         ir_node      *      step_block = header_block;
5017         expression_t *const step       = statement->step;
5018         if (step != NULL) {
5019                 step_block = new_immBlock();
5020         }
5021
5022         ir_node *const old_continue_label = continue_label;
5023         ir_node *const old_break_label    = break_label;
5024         continue_label = step_block;
5025         break_label    = false_block;
5026
5027         /* Create the loop body. */
5028         set_cur_block(body_block);
5029         statement_to_firm(statement->body);
5030         jump_if_reachable(step_block);
5031
5032         /* Create the step code. */
5033         if (step != NULL) {
5034                 mature_immBlock(step_block);
5035                 set_cur_block(step_block);
5036                 expression_to_firm(step);
5037                 jump_if_reachable(header_block);
5038         }
5039
5040         mature_immBlock(header_block);
5041         assert(false_block == NULL || false_block == break_label);
5042         false_block = break_label;
5043         if (false_block != NULL) {
5044                 mature_immBlock(false_block);
5045         }
5046         set_cur_block(false_block);
5047
5048         assert(continue_label == step_block);
5049         continue_label = old_continue_label;
5050         break_label    = old_break_label;
5051 }
5052
5053 static void create_jump_statement(const statement_t *statement,
5054                                   ir_node *target_block)
5055 {
5056         if (!currently_reachable())
5057                 return;
5058
5059         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5060         ir_node  *jump = new_d_Jmp(dbgi);
5061         add_immBlock_pred(target_block, jump);
5062
5063         set_unreachable_now();
5064 }
5065
5066 static void switch_statement_to_firm(switch_statement_t *statement)
5067 {
5068         ir_node  *first_block = NULL;
5069         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
5070         ir_node  *cond        = NULL;
5071
5072         if (currently_reachable()) {
5073                 ir_node *expression = expression_to_firm(statement->expression);
5074                 cond                = new_d_Cond(dbgi, expression);
5075                 first_block         = get_cur_block();
5076         }
5077
5078         set_unreachable_now();
5079
5080         ir_node *const old_switch_cond       = current_switch_cond;
5081         ir_node *const old_break_label       = break_label;
5082         const bool     old_saw_default_label = saw_default_label;
5083         saw_default_label                    = false;
5084         current_switch_cond                  = cond;
5085         break_label                          = NULL;
5086         switch_statement_t *const old_switch = current_switch;
5087         current_switch                       = statement;
5088
5089         /* determine a free number for the default label */
5090         unsigned long num_cases       = 0;
5091         long          default_proj_nr = 0;
5092         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5093                 if (l->expression == NULL) {
5094                         /* default case */
5095                         continue;
5096                 }
5097                 if (l->last_case >= l->first_case)
5098                         num_cases += l->last_case - l->first_case + 1;
5099                 if (l->last_case > default_proj_nr)
5100                         default_proj_nr = l->last_case;
5101         }
5102
5103         if (default_proj_nr == LONG_MAX) {
5104                 /* Bad: an overflow will occur, we cannot be sure that the
5105                  * maximum + 1 is a free number. Scan the values a second
5106                  * time to find a free number.
5107                  */
5108                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
5109
5110                 memset(bits, 0, (num_cases + 7) >> 3);
5111                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5112                         if (l->expression == NULL) {
5113                                 /* default case */
5114                                 continue;
5115                         }
5116                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
5117                         if (start < num_cases && l->last_case >= 0) {
5118                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
5119                                         (unsigned long)l->last_case : num_cases - 1;
5120                                 for (unsigned long cns = start; cns <= end; ++cns) {
5121                                         bits[cns >> 3] |= (1 << (cns & 7));
5122                                 }
5123                         }
5124                 }
5125                 /* We look at the first num_cases constants:
5126                  * Either they are dense, so we took the last (num_cases)
5127                  * one, or they are not dense, so we will find one free
5128                  * there...
5129                  */
5130                 unsigned long i;
5131                 for (i = 0; i < num_cases; ++i)
5132                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
5133                                 break;
5134
5135                 free(bits);
5136                 default_proj_nr = i;
5137         } else {
5138                 ++default_proj_nr;
5139         }
5140         statement->default_proj_nr = default_proj_nr;
5141         /* safety check: cond might already be folded to a Bad */
5142         if (cond != NULL && is_Cond(cond)) {
5143                 set_Cond_default_proj(cond, default_proj_nr);
5144         }
5145
5146         statement_to_firm(statement->body);
5147
5148         jump_if_reachable(get_break_label());
5149
5150         if (!saw_default_label && first_block != NULL) {
5151                 set_cur_block(first_block);
5152                 ir_node *const proj = new_d_Proj(dbgi, cond, mode_X, default_proj_nr);
5153                 add_immBlock_pred(get_break_label(), proj);
5154         }
5155
5156         if (break_label != NULL) {
5157                 mature_immBlock(break_label);
5158         }
5159         set_cur_block(break_label);
5160
5161         assert(current_switch_cond == cond);
5162         current_switch      = old_switch;
5163         current_switch_cond = old_switch_cond;
5164         break_label         = old_break_label;
5165         saw_default_label   = old_saw_default_label;
5166 }
5167
5168 static void case_label_to_firm(const case_label_statement_t *statement)
5169 {
5170         if (statement->is_empty_range)
5171                 return;
5172
5173         ir_node *block = new_immBlock();
5174         /* Fallthrough from previous case */
5175         jump_if_reachable(block);
5176
5177         if (current_switch_cond != NULL) {
5178                 set_cur_block(get_nodes_block(current_switch_cond));
5179                 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5180                 if (statement->expression != NULL) {
5181                         long pn     = statement->first_case;
5182                         long end_pn = statement->last_case;
5183                         assert(pn <= end_pn);
5184                         /* create jumps for all cases in the given range */
5185                         do {
5186                                 ir_node *const proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
5187                                 add_immBlock_pred(block, proj);
5188                         } while (pn++ < end_pn);
5189                 } else {
5190                         saw_default_label = true;
5191                         ir_node *const proj = new_d_Proj(dbgi, current_switch_cond, mode_X,
5192                                                          current_switch->default_proj_nr);
5193                         add_immBlock_pred(block, proj);
5194                 }
5195         }
5196
5197         mature_immBlock(block);
5198         set_cur_block(block);
5199
5200         statement_to_firm(statement->statement);
5201 }
5202
5203 static void label_to_firm(const label_statement_t *statement)
5204 {
5205         ir_node *block = get_label_block(statement->label);
5206         jump_if_reachable(block);
5207
5208         set_cur_block(block);
5209         keep_alive(block);
5210         keep_all_memory(block);
5211
5212         statement_to_firm(statement->statement);
5213 }
5214
5215 static void goto_to_firm(const goto_statement_t *statement)
5216 {
5217         if (!currently_reachable())
5218                 return;
5219
5220         if (statement->expression) {
5221                 ir_node  *irn  = expression_to_firm(statement->expression);
5222                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5223                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
5224
5225                 set_irn_link(ijmp, ijmp_list);
5226                 ijmp_list = ijmp;
5227         } else {
5228                 ir_node *block = get_label_block(statement->label);
5229                 ir_node *jmp   = new_Jmp();
5230                 add_immBlock_pred(block, jmp);
5231         }
5232         set_unreachable_now();
5233 }
5234
5235 static void asm_statement_to_firm(const asm_statement_t *statement)
5236 {
5237         bool needs_memory = false;
5238
5239         if (statement->is_volatile) {
5240                 needs_memory = true;
5241         }
5242
5243         size_t         n_clobbers = 0;
5244         asm_clobber_t *clobber    = statement->clobbers;
5245         for ( ; clobber != NULL; clobber = clobber->next) {
5246                 const char *clobber_str = clobber->clobber.begin;
5247
5248                 if (!be_is_valid_clobber(clobber_str)) {
5249                         errorf(&statement->base.source_position,
5250                                    "invalid clobber '%s' specified", clobber->clobber);
5251                         continue;
5252                 }
5253
5254                 if (strcmp(clobber_str, "memory") == 0) {
5255                         needs_memory = true;
5256                         continue;
5257                 }
5258
5259                 ident *id = new_id_from_str(clobber_str);
5260                 obstack_ptr_grow(&asm_obst, id);
5261                 ++n_clobbers;
5262         }
5263         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5264         ident **clobbers = NULL;
5265         if (n_clobbers > 0) {
5266                 clobbers = obstack_finish(&asm_obst);
5267         }
5268
5269         size_t n_inputs  = 0;
5270         asm_argument_t *argument = statement->inputs;
5271         for ( ; argument != NULL; argument = argument->next)
5272                 n_inputs++;
5273         size_t n_outputs = 0;
5274         argument = statement->outputs;
5275         for ( ; argument != NULL; argument = argument->next)
5276                 n_outputs++;
5277
5278         unsigned next_pos = 0;
5279
5280         ir_node *ins[n_inputs + n_outputs + 1];
5281         size_t   in_size = 0;
5282
5283         ir_asm_constraint tmp_in_constraints[n_outputs];
5284
5285         const expression_t *out_exprs[n_outputs];
5286         ir_node            *out_addrs[n_outputs];
5287         size_t              out_size = 0;
5288
5289         argument = statement->outputs;
5290         for ( ; argument != NULL; argument = argument->next) {
5291                 const char *constraints = argument->constraints.begin;
5292                 asm_constraint_flags_t asm_flags
5293                         = be_parse_asm_constraints(constraints);
5294
5295                 {
5296                         source_position_t const *const pos = &statement->base.source_position;
5297                         if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5298                                 warningf(WARN_OTHER, pos, "some constraints in '%s' are not supported", constraints);
5299                         }
5300                         if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5301                                 errorf(pos, "some constraints in '%s' are invalid", constraints);
5302                                 continue;
5303                         }
5304                         if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5305                                 errorf(pos, "no write flag specified for output constraints '%s'", constraints);
5306                                 continue;
5307                         }
5308                 }
5309
5310                 unsigned pos = next_pos++;
5311                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5312                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5313                         expression_t *expr = argument->expression;
5314                         ir_node      *addr = expression_to_addr(expr);
5315                         /* in+output, construct an artifical same_as constraint on the
5316                          * input */
5317                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5318                                 char     buf[64];
5319                                 ir_node *value = get_value_from_lvalue(expr, addr);
5320
5321                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5322
5323                                 ir_asm_constraint constraint;
5324                                 constraint.pos              = pos;
5325                                 constraint.constraint       = new_id_from_str(buf);
5326                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5327                                 tmp_in_constraints[in_size] = constraint;
5328                                 ins[in_size] = value;
5329
5330                                 ++in_size;
5331                         }
5332
5333                         out_exprs[out_size] = expr;
5334                         out_addrs[out_size] = addr;
5335                         ++out_size;
5336                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5337                         /* pure memory ops need no input (but we have to make sure we
5338                          * attach to the memory) */
5339                         assert(! (asm_flags &
5340                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5341                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5342                         needs_memory = true;
5343
5344                         /* we need to attach the address to the inputs */
5345                         expression_t *expr = argument->expression;
5346
5347                         ir_asm_constraint constraint;
5348                         constraint.pos              = pos;
5349                         constraint.constraint       = new_id_from_str(constraints);
5350                         constraint.mode             = NULL;
5351                         tmp_in_constraints[in_size] = constraint;
5352
5353                         ins[in_size]          = expression_to_addr(expr);
5354                         ++in_size;
5355                         continue;
5356                 } else {
5357                         errorf(&statement->base.source_position,
5358                                "only modifiers but no place set in constraints '%s'",
5359                                constraints);
5360                         continue;
5361                 }
5362
5363                 ir_asm_constraint constraint;
5364                 constraint.pos        = pos;
5365                 constraint.constraint = new_id_from_str(constraints);
5366                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5367
5368                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5369         }
5370         assert(obstack_object_size(&asm_obst)
5371                         == out_size * sizeof(ir_asm_constraint));
5372         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5373
5374
5375         obstack_grow(&asm_obst, tmp_in_constraints,
5376                      in_size * sizeof(tmp_in_constraints[0]));
5377         /* find and count input and output arguments */
5378         argument = statement->inputs;
5379         for ( ; argument != NULL; argument = argument->next) {
5380                 const char *constraints = argument->constraints.begin;
5381                 asm_constraint_flags_t asm_flags
5382                         = be_parse_asm_constraints(constraints);
5383
5384                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5385                         errorf(&statement->base.source_position,
5386                                "some constraints in '%s' are not supported", constraints);
5387                         continue;
5388                 }
5389                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5390                         errorf(&statement->base.source_position,
5391                                "some constraints in '%s' are invalid", constraints);
5392                         continue;
5393                 }
5394                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5395                         errorf(&statement->base.source_position,
5396                                "write flag specified for input constraints '%s'",
5397                                constraints);
5398                         continue;
5399                 }
5400
5401                 ir_node *input;
5402                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5403                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5404                         /* we can treat this as "normal" input */
5405                         input = expression_to_firm(argument->expression);
5406                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5407                         /* pure memory ops need no input (but we have to make sure we
5408                          * attach to the memory) */
5409                         assert(! (asm_flags &
5410                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5411                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5412                         needs_memory = true;
5413                         input = expression_to_addr(argument->expression);
5414                 } else {
5415                         errorf(&statement->base.source_position,
5416                                "only modifiers but no place set in constraints '%s'",
5417                                constraints);
5418                         continue;
5419                 }
5420
5421                 ir_asm_constraint constraint;
5422                 constraint.pos        = next_pos++;
5423                 constraint.constraint = new_id_from_str(constraints);
5424                 constraint.mode       = get_irn_mode(input);
5425
5426                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5427                 ins[in_size++] = input;
5428         }
5429
5430         if (needs_memory) {
5431                 ir_asm_constraint constraint;
5432                 constraint.pos        = next_pos++;
5433                 constraint.constraint = new_id_from_str("");
5434                 constraint.mode       = mode_M;
5435
5436                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5437                 ins[in_size++] = get_store();
5438         }
5439
5440         assert(obstack_object_size(&asm_obst)
5441                         == in_size * sizeof(ir_asm_constraint));
5442         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5443
5444         /* create asm node */
5445         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5446
5447         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5448
5449         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5450                                   out_size, output_constraints,
5451                                   n_clobbers, clobbers, asm_text);
5452
5453         if (statement->is_volatile) {
5454                 set_irn_pinned(node, op_pin_state_pinned);
5455         } else {
5456                 set_irn_pinned(node, op_pin_state_floats);
5457         }
5458
5459         /* create output projs & connect them */
5460         if (needs_memory) {
5461                 ir_node *projm = new_Proj(node, mode_M, out_size);
5462                 set_store(projm);
5463         }
5464
5465         size_t i;
5466         for (i = 0; i < out_size; ++i) {
5467                 const expression_t *out_expr = out_exprs[i];
5468                 long                pn       = i;
5469                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5470                 ir_node            *proj     = new_Proj(node, mode, pn);
5471                 ir_node            *addr     = out_addrs[i];
5472
5473                 set_value_for_expression_addr(out_expr, proj, addr);
5474         }
5475 }
5476
5477 static void ms_try_statement_to_firm(ms_try_statement_t *statement)
5478 {
5479         statement_to_firm(statement->try_statement);
5480         source_position_t const *const pos = &statement->base.source_position;
5481         warningf(WARN_OTHER, pos, "structured exception handling ignored");
5482 }
5483
5484 static void leave_statement_to_firm(leave_statement_t *statement)
5485 {
5486         errorf(&statement->base.source_position, "__leave not supported yet");
5487 }
5488
5489 /**
5490  * Transform a statement.
5491  */
5492 static void statement_to_firm(statement_t *statement)
5493 {
5494 #ifndef NDEBUG
5495         assert(!statement->base.transformed);
5496         statement->base.transformed = true;
5497 #endif
5498
5499         switch (statement->kind) {
5500         case STATEMENT_INVALID:
5501                 panic("invalid statement found");
5502         case STATEMENT_EMPTY:
5503                 /* nothing */
5504                 return;
5505         case STATEMENT_COMPOUND:
5506                 compound_statement_to_firm(&statement->compound);
5507                 return;
5508         case STATEMENT_RETURN:
5509                 return_statement_to_firm(&statement->returns);
5510                 return;
5511         case STATEMENT_EXPRESSION:
5512                 expression_statement_to_firm(&statement->expression);
5513                 return;
5514         case STATEMENT_IF:
5515                 if_statement_to_firm(&statement->ifs);
5516                 return;
5517         case STATEMENT_WHILE:
5518                 while_statement_to_firm(&statement->whiles);
5519                 return;
5520         case STATEMENT_DO_WHILE:
5521                 do_while_statement_to_firm(&statement->do_while);
5522                 return;
5523         case STATEMENT_DECLARATION:
5524                 declaration_statement_to_firm(&statement->declaration);
5525                 return;
5526         case STATEMENT_BREAK:
5527                 create_jump_statement(statement, get_break_label());
5528                 return;
5529         case STATEMENT_CONTINUE:
5530                 create_jump_statement(statement, continue_label);
5531                 return;
5532         case STATEMENT_SWITCH:
5533                 switch_statement_to_firm(&statement->switchs);
5534                 return;
5535         case STATEMENT_CASE_LABEL:
5536                 case_label_to_firm(&statement->case_label);
5537                 return;
5538         case STATEMENT_FOR:
5539                 for_statement_to_firm(&statement->fors);
5540                 return;
5541         case STATEMENT_LABEL:
5542                 label_to_firm(&statement->label);
5543                 return;
5544         case STATEMENT_GOTO:
5545                 goto_to_firm(&statement->gotos);
5546                 return;
5547         case STATEMENT_ASM:
5548                 asm_statement_to_firm(&statement->asms);
5549                 return;
5550         case STATEMENT_MS_TRY:
5551                 ms_try_statement_to_firm(&statement->ms_try);
5552                 return;
5553         case STATEMENT_LEAVE:
5554                 leave_statement_to_firm(&statement->leave);
5555                 return;
5556         }
5557         panic("statement not implemented");
5558 }
5559
5560 static int count_local_variables(const entity_t *entity,
5561                                  const entity_t *const last)
5562 {
5563         int count = 0;
5564         entity_t const *const end = last != NULL ? last->base.next : NULL;
5565         for (; entity != end; entity = entity->base.next) {
5566                 type_t *type;
5567                 bool    address_taken;
5568
5569                 if (entity->kind == ENTITY_VARIABLE) {
5570                         type          = skip_typeref(entity->declaration.type);
5571                         address_taken = entity->variable.address_taken;
5572                 } else if (entity->kind == ENTITY_PARAMETER) {
5573                         type          = skip_typeref(entity->declaration.type);
5574                         address_taken = entity->parameter.address_taken;
5575                 } else {
5576                         continue;
5577                 }
5578
5579                 if (!address_taken && is_type_scalar(type))
5580                         ++count;
5581         }
5582         return count;
5583 }
5584
5585 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5586 {
5587         int *const count = env;
5588
5589         switch (stmt->kind) {
5590         case STATEMENT_DECLARATION: {
5591                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5592                 *count += count_local_variables(decl_stmt->declarations_begin,
5593                                 decl_stmt->declarations_end);
5594                 break;
5595         }
5596
5597         case STATEMENT_FOR:
5598                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5599                 break;
5600
5601         default:
5602                 break;
5603         }
5604 }
5605
5606 /**
5607  * Return the number of local (alias free) variables used by a function.
5608  */
5609 static int get_function_n_local_vars(entity_t *entity)
5610 {
5611         const function_t *function = &entity->function;
5612         int count = 0;
5613
5614         /* count parameters */
5615         count += count_local_variables(function->parameters.entities, NULL);
5616
5617         /* count local variables declared in body */
5618         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5619         return count;
5620 }
5621
5622 /**
5623  * Build Firm code for the parameters of a function.
5624  */
5625 static void initialize_function_parameters(entity_t *entity)
5626 {
5627         assert(entity->kind == ENTITY_FUNCTION);
5628         ir_graph *irg             = current_ir_graph;
5629         ir_node  *args            = get_irg_args(irg);
5630         int       n               = 0;
5631         ir_type  *function_irtype;
5632
5633         if (entity->function.need_closure) {
5634                 /* add an extra parameter for the static link */
5635                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5636                 ++n;
5637
5638                 /* Matze: IMO this is wrong, nested functions should have an own
5639                  * type and not rely on strange parameters... */
5640                 function_irtype = create_method_type(&entity->declaration.type->function, true);
5641         } else {
5642                 function_irtype = get_ir_type(entity->declaration.type);
5643         }
5644
5645
5646
5647         entity_t *parameter = entity->function.parameters.entities;
5648         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5649                 if (parameter->kind != ENTITY_PARAMETER)
5650                         continue;
5651
5652                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5653                 type_t *type = skip_typeref(parameter->declaration.type);
5654
5655                 bool needs_entity = parameter->parameter.address_taken;
5656                 assert(!is_type_array(type));
5657                 if (is_type_compound(type)) {
5658                         needs_entity = true;
5659                 }
5660
5661                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5662                 if (needs_entity) {
5663                         ir_type   *frame_type = get_irg_frame_type(irg);
5664                         ir_entity *param
5665                                 = new_parameter_entity(frame_type, n, param_irtype);
5666                         parameter->declaration.kind
5667                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5668                         parameter->parameter.v.entity = param;
5669                         continue;
5670                 }
5671
5672                 ir_mode *param_mode = get_type_mode(param_irtype);
5673                 long     pn         = n;
5674                 ir_node *value      = new_r_Proj(args, param_mode, pn);
5675
5676                 ir_mode *mode = get_ir_mode_storage(type);
5677                 value = create_conv(NULL, value, mode);
5678                 value = do_strict_conv(NULL, value);
5679
5680                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5681                 parameter->parameter.v.value_number = next_value_number_function;
5682                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5683                                         parameter);
5684                 ++next_value_number_function;
5685
5686                 set_value(parameter->parameter.v.value_number, value);
5687         }
5688 }
5689
5690 /**
5691  * Handle additional decl modifiers for IR-graphs
5692  *
5693  * @param irg            the IR-graph
5694  * @param dec_modifiers  additional modifiers
5695  */
5696 static void handle_decl_modifier_irg(ir_graph_ptr irg,
5697                                      decl_modifiers_t decl_modifiers)
5698 {
5699         if (decl_modifiers & DM_RETURNS_TWICE) {
5700                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5701                 add_irg_additional_properties(irg, mtp_property_returns_twice);
5702         }
5703         if (decl_modifiers & DM_NORETURN) {
5704                 /* TRUE if the declaration includes the Microsoft
5705                    __declspec(noreturn) specifier. */
5706                 add_irg_additional_properties(irg, mtp_property_noreturn);
5707         }
5708         if (decl_modifiers & DM_NOTHROW) {
5709                 /* TRUE if the declaration includes the Microsoft
5710                    __declspec(nothrow) specifier. */
5711                 add_irg_additional_properties(irg, mtp_property_nothrow);
5712         }
5713         if (decl_modifiers & DM_NAKED) {
5714                 /* TRUE if the declaration includes the Microsoft
5715                    __declspec(naked) specifier. */
5716                 add_irg_additional_properties(irg, mtp_property_naked);
5717         }
5718         if (decl_modifiers & DM_FORCEINLINE) {
5719                 /* TRUE if the declaration includes the
5720                    Microsoft __forceinline specifier. */
5721                 set_irg_inline_property(irg, irg_inline_forced);
5722         }
5723         if (decl_modifiers & DM_NOINLINE) {
5724                 /* TRUE if the declaration includes the Microsoft
5725                    __declspec(noinline) specifier. */
5726                 set_irg_inline_property(irg, irg_inline_forbidden);
5727         }
5728 }
5729
5730 static void add_function_pointer(ir_type *segment, ir_entity *method,
5731                                  const char *unique_template)
5732 {
5733         ir_type   *method_type  = get_entity_type(method);
5734         ir_type   *ptr_type     = new_type_pointer(method_type);
5735
5736         /* these entities don't really have a name but firm only allows
5737          * "" in ld_ident.
5738          * Note that we mustn't give these entities a name since for example
5739          * Mach-O doesn't allow them. */
5740         ident     *ide          = id_unique(unique_template);
5741         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5742         ir_graph  *irg          = get_const_code_irg();
5743         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5744                                                            method);
5745
5746         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5747         set_entity_compiler_generated(ptr, 1);
5748         set_entity_visibility(ptr, ir_visibility_private);
5749         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5750         set_atomic_ent_value(ptr, val);
5751 }
5752
5753 /**
5754  * Generate possible IJmp branches to a given label block.
5755  */
5756 static void gen_ijmp_branches(ir_node *block)
5757 {
5758         ir_node *ijmp;
5759         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5760                 add_immBlock_pred(block, ijmp);
5761         }
5762 }
5763
5764 /**
5765  * Create code for a function and all inner functions.
5766  *
5767  * @param entity  the function entity
5768  */
5769 static void create_function(entity_t *entity)
5770 {
5771         assert(entity->kind == ENTITY_FUNCTION);
5772         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5773
5774         if (entity->function.statement == NULL)
5775                 return;
5776
5777         if (is_main(entity) && enable_main_collect2_hack) {
5778                 prepare_main_collect2(entity);
5779         }
5780
5781         inner_functions     = NULL;
5782         current_trampolines = NULL;
5783
5784         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5785                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5786                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5787         }
5788         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5789                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5790                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5791         }
5792
5793         current_function_entity = entity;
5794         current_function_name   = NULL;
5795         current_funcsig         = NULL;
5796
5797         assert(all_labels == NULL);
5798         all_labels = NEW_ARR_F(label_t *, 0);
5799         ijmp_list  = NULL;
5800
5801         int       n_local_vars = get_function_n_local_vars(entity);
5802         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5803         current_ir_graph = irg;
5804
5805         ir_graph *old_current_function = current_function;
5806         current_function = irg;
5807
5808         set_irg_fp_model(irg, firm_fp_model);
5809         tarval_enable_fp_ops(1);
5810         set_irn_dbg_info(get_irg_start_block(irg),
5811                          get_entity_dbg_info(function_entity));
5812
5813         ir_node *first_block = get_cur_block();
5814
5815         /* set inline flags */
5816         if (entity->function.is_inline)
5817                 set_irg_inline_property(irg, irg_inline_recomended);
5818         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5819
5820         next_value_number_function = 0;
5821         initialize_function_parameters(entity);
5822         current_static_link = entity->function.static_link;
5823
5824         statement_to_firm(entity->function.statement);
5825
5826         ir_node *end_block = get_irg_end_block(irg);
5827
5828         /* do we have a return statement yet? */
5829         if (currently_reachable()) {
5830                 type_t *type = skip_typeref(entity->declaration.type);
5831                 assert(is_type_function(type));
5832                 const function_type_t *func_type   = &type->function;
5833                 const type_t          *return_type
5834                         = skip_typeref(func_type->return_type);
5835
5836                 ir_node *ret;
5837                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5838                         ret = new_Return(get_store(), 0, NULL);
5839                 } else {
5840                         ir_mode *mode;
5841                         if (is_type_scalar(return_type)) {
5842                                 mode = get_ir_mode_storage(func_type->return_type);
5843                         } else {
5844                                 mode = mode_P_data;
5845                         }
5846
5847                         ir_node *in[1];
5848                         /* §5.1.2.2.3 main implicitly returns 0 */
5849                         if (is_main(entity)) {
5850                                 in[0] = new_Const(get_mode_null(mode));
5851                         } else {
5852                                 in[0] = new_Unknown(mode);
5853                         }
5854                         ret = new_Return(get_store(), 1, in);
5855                 }
5856                 add_immBlock_pred(end_block, ret);
5857         }
5858
5859         bool has_computed_gotos = false;
5860         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5861                 label_t *label = all_labels[i];
5862                 if (label->address_taken) {
5863                         gen_ijmp_branches(label->block);
5864                         has_computed_gotos = true;
5865                 }
5866                 mature_immBlock(label->block);
5867         }
5868         if (has_computed_gotos) {
5869                 /* if we have computed goto's in the function, we cannot inline it */
5870                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5871                         source_position_t const *const pos = &entity->base.source_position;
5872                         warningf(WARN_OTHER, pos, "'%N' can never be inlined because it contains a computed goto", entity);
5873                 }
5874                 set_irg_inline_property(irg, irg_inline_forbidden);
5875         }
5876
5877         DEL_ARR_F(all_labels);
5878         all_labels = NULL;
5879
5880         mature_immBlock(first_block);
5881         mature_immBlock(end_block);
5882
5883         irg_finalize_cons(irg);
5884
5885         /* finalize the frame type */
5886         ir_type *frame_type = get_irg_frame_type(irg);
5887         int      n          = get_compound_n_members(frame_type);
5888         int      align_all  = 4;
5889         int      offset     = 0;
5890         for (int i = 0; i < n; ++i) {
5891                 ir_entity *member      = get_compound_member(frame_type, i);
5892                 ir_type   *entity_type = get_entity_type(member);
5893
5894                 int align = get_type_alignment_bytes(entity_type);
5895                 if (align > align_all)
5896                         align_all = align;
5897                 int misalign = 0;
5898                 if (align > 0) {
5899                         misalign  = offset % align;
5900                         if (misalign > 0) {
5901                                 offset += align - misalign;
5902                         }
5903                 }
5904
5905                 set_entity_offset(member, offset);
5906                 offset += get_type_size_bytes(entity_type);
5907         }
5908         set_type_size_bytes(frame_type, offset);
5909         set_type_alignment_bytes(frame_type, align_all);
5910
5911         irg_verify(irg, VERIFY_ENFORCE_SSA);
5912         current_function = old_current_function;
5913
5914         if (current_trampolines != NULL) {
5915                 DEL_ARR_F(current_trampolines);
5916                 current_trampolines = NULL;
5917         }
5918
5919         /* create inner functions if any */
5920         entity_t **inner = inner_functions;
5921         if (inner != NULL) {
5922                 ir_type *rem_outer_frame      = current_outer_frame;
5923                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5924                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5925                         create_function(inner[i]);
5926                 }
5927                 DEL_ARR_F(inner);
5928
5929                 current_outer_frame      = rem_outer_frame;
5930         }
5931 }
5932
5933 static void scope_to_firm(scope_t *scope)
5934 {
5935         /* first pass: create declarations */
5936         entity_t *entity = scope->entities;
5937         for ( ; entity != NULL; entity = entity->base.next) {
5938                 if (entity->base.symbol == NULL)
5939                         continue;
5940
5941                 if (entity->kind == ENTITY_FUNCTION) {
5942                         if (entity->function.btk != bk_none) {
5943                                 /* builtins have no representation */
5944                                 continue;
5945                         }
5946                         (void)get_function_entity(entity, NULL);
5947                 } else if (entity->kind == ENTITY_VARIABLE) {
5948                         create_global_variable(entity);
5949                 } else if (entity->kind == ENTITY_NAMESPACE) {
5950                         scope_to_firm(&entity->namespacee.members);
5951                 }
5952         }
5953
5954         /* second pass: create code/initializers */
5955         entity = scope->entities;
5956         for ( ; entity != NULL; entity = entity->base.next) {
5957                 if (entity->base.symbol == NULL)
5958                         continue;
5959
5960                 if (entity->kind == ENTITY_FUNCTION) {
5961                         if (entity->function.btk != bk_none) {
5962                                 /* builtins have no representation */
5963                                 continue;
5964                         }
5965                         create_function(entity);
5966                 } else if (entity->kind == ENTITY_VARIABLE) {
5967                         assert(entity->declaration.kind
5968                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5969                         current_ir_graph = get_const_code_irg();
5970                         create_variable_initializer(entity);
5971                 }
5972         }
5973 }
5974
5975 void init_ast2firm(void)
5976 {
5977         obstack_init(&asm_obst);
5978         init_atomic_modes();
5979
5980         ir_set_debug_retrieve(dbg_retrieve);
5981         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
5982
5983         /* create idents for all known runtime functions */
5984         for (size_t i = 0; i < lengthof(rts_data); ++i) {
5985                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5986         }
5987
5988         entitymap_init(&entitymap);
5989 }
5990
5991 static void init_ir_types(void)
5992 {
5993         static int ir_types_initialized = 0;
5994         if (ir_types_initialized)
5995                 return;
5996         ir_types_initialized = 1;
5997
5998         ir_type_int        = get_ir_type(type_int);
5999         ir_type_char       = get_ir_type(type_char);
6000         ir_type_const_char = get_ir_type(type_const_char);
6001         ir_type_wchar_t    = get_ir_type(type_wchar_t);
6002         ir_type_void       = get_ir_type(type_void);
6003
6004         be_params             = be_get_backend_param();
6005         mode_float_arithmetic = be_params->mode_float_arithmetic;
6006
6007         stack_param_align     = be_params->stack_param_align;
6008 }
6009
6010 void exit_ast2firm(void)
6011 {
6012         entitymap_destroy(&entitymap);
6013         obstack_free(&asm_obst, NULL);
6014 }
6015
6016 static void global_asm_to_firm(statement_t *s)
6017 {
6018         for (; s != NULL; s = s->base.next) {
6019                 assert(s->kind == STATEMENT_ASM);
6020
6021                 char const *const text = s->asms.asm_text.begin;
6022                 size_t            size = s->asms.asm_text.size;
6023
6024                 /* skip the last \0 */
6025                 if (text[size - 1] == '\0')
6026                         --size;
6027
6028                 ident *const id = new_id_from_chars(text, size);
6029                 add_irp_asm(id);
6030         }
6031 }
6032
6033 void translation_unit_to_firm(translation_unit_t *unit)
6034 {
6035         /* initialize firm arithmetic */
6036         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
6037         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
6038
6039         /* just to be sure */
6040         continue_label           = NULL;
6041         break_label              = NULL;
6042         current_switch_cond      = NULL;
6043         current_translation_unit = unit;
6044
6045         init_ir_types();
6046
6047         scope_to_firm(&unit->scope);
6048         global_asm_to_firm(unit->global_asm);
6049
6050         current_ir_graph         = NULL;
6051         current_translation_unit = NULL;
6052 }