nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25
  26 #include <libfirm/firm.h>
  27 #include <libfirm/adt/obst.h>
  28 #include <libfirm/be.h>
  29
  30 #include "ast2firm.h"
  31
  32 #include "adt/error.h"
  33 #include "adt/array.h"
  34 #include "symbol_t.h"
  35 #include "token_t.h"
  36 #include "type_t.h"
  37 #include "ast_t.h"
  38 #include "parser.h"
  39 #include "diagnostic.h"
  40 #include "lang_features.h"
  41 #include "types.h"
  42 #include "warning.h"
  43 #include "entitymap_t.h"
  44 #include "driver/firm_opt.h"
  45 #include "driver/firm_cmdline.h"
  46
  47 /* some idents needed for name mangling */
  48 static ident *id_underscore;
  49 static ident *id_imp;
  50
  51 static ir_type *ir_type_const_char;
  52 static ir_type *ir_type_wchar_t;
  53 static ir_type *ir_type_void;
  54 static ir_type *ir_type_int;
  55
  56 static int             next_value_number_function;
  57 static ir_node        *continue_label;
  58 static ir_node        *break_label;
  59 static ir_node        *current_switch_cond;
  60 static bool            saw_default_label;
  61 static declaration_t **all_labels;
  62 static declaration_t **inner_functions;
  63 static int             inner_function_idx;
  64 static ir_node        *ijmp_list;
  65 static bool            constant_folding;
  66
  67 extern bool            have_const_functions;
  68
  69 static const declaration_t *current_function_decl;
  70 static ir_node             *current_function_name;
  71 static ir_node             *current_funcsig;
  72 static switch_statement_t  *current_switch;
  73 static ir_graph            *current_function;
  74
  75 static entitymap_t  entitymap;
  76
  77 static struct obstack asm_obst;
  78
  79 typedef enum declaration_kind_t {
  80         DECLARATION_KIND_UNKNOWN,
  81         DECLARATION_KIND_FUNCTION,
  82         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  83         DECLARATION_KIND_GLOBAL_VARIABLE,
  84         DECLARATION_KIND_LOCAL_VARIABLE,
  85         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  86         DECLARATION_KIND_COMPOUND_MEMBER,
  87         DECLARATION_KIND_LABEL_BLOCK,
  88         DECLARATION_KIND_ENUM_ENTRY,
  89         DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE,
  90         DECLARATION_KIND_COMPOUND_TYPE_COMPLETE,
  91         DECLARATION_KIND_TYPE,
  92         DECLARATION_KIND_INNER_FUNCTION
  93 } declaration_kind_t;
  94
  95 static ir_type *get_ir_type(type_t *type);
  96 static ir_type *get_ir_type_incomplete(type_t *type);
  97 static int count_decls_in_stmts(const statement_t *stmt);
  98
  99 static void enqueue_inner_function(declaration_t *declaration) {
 100         if (inner_functions == NULL) {
 101                 inner_functions = NEW_ARR_F(declaration_t *, 16);
 102                 inner_functions[0] = declaration;
 103                 inner_function_idx = 1;
 104         } else {
 105                 int size = ARR_LEN(inner_functions);
 106                 if (inner_function_idx >= size) {
 107                         ARR_RESIZE(declaration_t *, inner_functions, size + 16);
 108                 }
 109                 inner_functions[inner_function_idx++] = declaration;
 110         }
 111 }
 112
 113 static declaration_t *next_inner_function(void) {
 114         if (inner_function_idx == 0)
 115                 return 0;
 116         return inner_functions[--inner_function_idx];
 117 }
 118
 119 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 120 {
 121         const declaration_t *declaration = get_irg_loc_description(irg, pos);
 122
 123         if (declaration != NULL) {
 124                 warningf(&declaration->source_position,
 125                          "variable '%#T' might be used uninitialized",
 126                          declaration->type, declaration->symbol);
 127         }
 128         return new_r_Unknown(irg, mode);
 129 }
 130
 131 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 132 {
 133         const source_position_t *pos = (const source_position_t*) dbg;
 134         if (pos == NULL)
 135                 return 0;
 136         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 137                                    pos->linenr);
 138 }
 139
 140 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 141 {
 142         const source_position_t *pos = (const source_position_t*) dbg;
 143         if (pos == NULL)
 144                 return NULL;
 145         if (line != NULL)
 146                 *line = pos->linenr;
 147         return pos->input_name;
 148 }
 149
 150 static dbg_info *get_dbg_info(const source_position_t *pos)
 151 {
 152         return (dbg_info*) pos;
 153 }
 154
 155 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 156
 157 static ir_mode *mode_int, *mode_uint;
 158
 159 static ir_node *_expression_to_firm(const expression_t *expression);
 160 static ir_node *expression_to_firm(const expression_t *expression);
 161 static inline ir_mode *get_ir_mode(type_t *type);
 162 static void create_local_declaration(declaration_t *declaration);
 163
 164 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 165 {
 166         unsigned flags = get_atomic_type_flags(kind);
 167         unsigned size  = get_atomic_type_size(kind);
 168         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 169                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 170                 char            name[64];
 171                 ir_mode_sort    sort;
 172                 unsigned        bit_size     = size * 8;
 173                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 174                 ir_mode_arithmetic arithmetic;
 175                 unsigned        modulo_shift;
 176
 177                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 178                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 179                         snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
 180                         sort         = irms_int_number;
 181                         arithmetic   = irma_twos_complement;
 182                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 183                 } else {
 184                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 185                         snprintf(name, sizeof(name), "f%d", bit_size);
 186                         sort         = irms_float_number;
 187                         arithmetic   = irma_ieee754;
 188                         modulo_shift = 0;
 189                 }
 190                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 191                                    modulo_shift);
 192         }
 193
 194         return NULL;
 195 }
 196
 197 /**
 198  * Initialises the atomic modes depending on the machine size.
 199  */
 200 static void init_atomic_modes(void)
 201 {
 202         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 203                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 204         }
 205         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 206         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 207
 208         /* there's no real void type in firm */
 209         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 210
 211         /* initialize pointer modes */
 212         char            name[64];
 213         ir_mode_sort    sort         = irms_reference;
 214         unsigned        bit_size     = machine_size;
 215         bool            is_signed    = 0;
 216         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 217         unsigned        modulo_shift
 218                 = bit_size < machine_size ? machine_size : bit_size;
 219
 220         snprintf(name, sizeof(name), "p%d", machine_size);
 221         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 222                                         modulo_shift);
 223
 224         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 225         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 226
 227         /* Hmm, pointers should be machine size */
 228         set_modeP_data(ptr_mode);
 229         set_modeP_code(ptr_mode);
 230 }
 231
 232 static unsigned get_compound_type_size(compound_type_t *type)
 233 {
 234         ir_type *irtype = get_ir_type((type_t*) type);
 235         return get_type_size_bytes(irtype);
 236 }
 237
 238 static unsigned get_array_type_size(array_type_t *type)
 239 {
 240         assert(!type->is_vla);
 241         ir_type *irtype = get_ir_type((type_t*) type);
 242         return get_type_size_bytes(irtype);
 243 }
 244
 245
 246 static unsigned get_type_size_const(type_t *type)
 247 {
 248         switch(type->kind) {
 249         case TYPE_ERROR:
 250                 panic("error type occurred");
 251         case TYPE_ATOMIC:
 252                 return get_atomic_type_size(type->atomic.akind);
 253         case TYPE_COMPLEX:
 254                 return 2 * get_atomic_type_size(type->complex.akind);
 255         case TYPE_IMAGINARY:
 256                 return get_atomic_type_size(type->imaginary.akind);
 257         case TYPE_ENUM:
 258                 return get_mode_size_bytes(mode_int);
 259         case TYPE_COMPOUND_UNION:
 260         case TYPE_COMPOUND_STRUCT:
 261                 return get_compound_type_size(&type->compound);
 262         case TYPE_FUNCTION:
 263                 /* just a pointer to the function */
 264                 return get_mode_size_bytes(mode_P_code);
 265         case TYPE_POINTER:
 266                 return get_mode_size_bytes(mode_P_data);
 267         case TYPE_ARRAY:
 268                 return get_array_type_size(&type->array);
 269         case TYPE_BUILTIN:
 270                 return get_type_size_const(type->builtin.real_type);
 271         case TYPE_BITFIELD:
 272                 panic("type size of bitfield request");
 273         case TYPE_TYPEDEF:
 274         case TYPE_TYPEOF:
 275         case TYPE_INVALID:
 276                 break;
 277         }
 278         panic("Trying to determine size of invalid type");
 279 }
 280
 281 static ir_node *get_type_size(type_t *type)
 282 {
 283         type = skip_typeref(type);
 284
 285         if (is_type_array(type) && type->array.is_vla) {
 286                 ir_node *size_node = type->array.size_node;
 287                 if (size_node == NULL) {
 288                         size_node = expression_to_firm(type->array.size_expression);
 289                         assert(!is_Const(size_node));
 290                         type->array.size_node = size_node;
 291                 }
 292
 293                 ir_node *elem_size = get_type_size(type->array.element_type);
 294                 ir_mode *mode      = get_irn_mode(size_node);
 295                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 296                 return real_size;
 297         }
 298
 299         ir_mode *mode = get_ir_mode(type_size_t);
 300         symconst_symbol sym;
 301         sym.type_p = get_ir_type(type);
 302         return new_SymConst(mode, sym, symconst_type_size);
 303 }
 304
 305 static unsigned count_parameters(const function_type_t *function_type)
 306 {
 307         unsigned count = 0;
 308
 309         function_parameter_t *parameter = function_type->parameters;
 310         for ( ; parameter != NULL; parameter = parameter->next) {
 311                 ++count;
 312         }
 313
 314         return count;
 315 }
 316
 317 /**
 318  * Creates a Firm type for an atomic type
 319  */
 320 static ir_type *create_atomic_type(const atomic_type_t *type)
 321 {
 322         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 323         atomic_type_kind_t  kind      = type->akind;
 324         ir_mode            *mode      = _atomic_modes[kind];
 325         ident              *id        = get_mode_ident(mode);
 326         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 327
 328         set_type_alignment_bytes(irtype, type->base.alignment);
 329
 330         return irtype;
 331 }
 332
 333 /**
 334  * Creates a Firm type for a complex type
 335  */
 336 static ir_type *create_complex_type(const complex_type_t *type)
 337 {
 338         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 339         atomic_type_kind_t  kind      = type->akind;
 340         ir_mode            *mode      = _atomic_modes[kind];
 341         ident              *id        = get_mode_ident(mode);
 342
 343         (void) id;
 344         (void) dbgi;
 345
 346         /* FIXME: finish the array */
 347         return NULL;
 348 }
 349
 350 /**
 351  * Creates a Firm type for an imaginary type
 352  */
 353 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 354 {
 355         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 356         atomic_type_kind_t  kind      = type->akind;
 357         ir_mode            *mode      = _atomic_modes[kind];
 358         ident              *id        = get_mode_ident(mode);
 359         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 360
 361         set_type_alignment_bytes(irtype, type->base.alignment);
 362
 363         return irtype;
 364 }
 365
 366 /**
 367  * return type of a parameter (and take transparent union gnu extension into
 368  * account)
 369  */
 370 static type_t *get_parameter_type(type_t *type)
 371 {
 372         type = skip_typeref(type);
 373         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 374                 declaration_t *decl = type->compound.declaration;
 375                 type                = decl->scope.declarations->type;
 376         }
 377
 378         return type;
 379 }
 380
 381 static ir_type *create_method_type(const function_type_t *function_type)
 382 {
 383         type_t  *return_type  = function_type->return_type;
 384
 385         ident   *id           = id_unique("functiontype.%u");
 386         int      n_parameters = count_parameters(function_type);
 387         int      n_results    = return_type == type_void ? 0 : 1;
 388         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 389         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 390
 391         if (return_type != type_void) {
 392                 ir_type *restype = get_ir_type(return_type);
 393                 set_method_res_type(irtype, 0, restype);
 394         }
 395
 396         function_parameter_t *parameter = function_type->parameters;
 397         int                   n         = 0;
 398         for ( ; parameter != NULL; parameter = parameter->next) {
 399                 type_t  *type     = get_parameter_type(parameter->type);
 400                 ir_type *p_irtype = get_ir_type(type);
 401                 set_method_param_type(irtype, n, p_irtype);
 402                 ++n;
 403         }
 404
 405         if (function_type->variadic || function_type->unspecified_parameters) {
 406                 set_method_variadicity(irtype, variadicity_variadic);
 407         }
 408
 409         unsigned cc = get_method_calling_convention(irtype);
 410         switch (function_type->calling_convention) {
 411         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 412         case CC_CDECL:
 413 is_cdecl:
 414                 set_method_calling_convention(irtype, SET_CDECL(cc));
 415                 break;
 416
 417         case CC_STDCALL:
 418                 if (function_type->variadic || function_type->unspecified_parameters)
 419                         goto is_cdecl;
 420
 421                 /* only non-variadic function can use stdcall, else use cdecl */
 422                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 423                 break;
 424
 425         case CC_FASTCALL:
 426                 if (function_type->variadic || function_type->unspecified_parameters)
 427                         goto is_cdecl;
 428                 /* only non-variadic function can use fastcall, else use cdecl */
 429                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 430                 break;
 431
 432         case CC_THISCALL:
 433                 /* Hmm, leave default, not accepted by the parser yet. */
 434                 warningf(&function_type->base.source_position, "THISCALL calling convention not supported yet");
 435                 break;
 436         }
 437         return irtype;
 438 }
 439
 440 static ir_type *create_pointer_type(pointer_type_t *type)
 441 {
 442         type_t   *points_to    = type->points_to;
 443         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 444         dbg_info *dbgi         = get_dbg_info(&type->base.source_position);
 445         ir_type  *ir_type      = new_d_type_pointer(id_unique("pointer.%u"),
 446                                                     ir_points_to, mode_P_data, dbgi);
 447
 448         return ir_type;
 449 }
 450
 451 static ir_type *create_array_type(array_type_t *type)
 452 {
 453         type_t  *element_type    = type->element_type;
 454         ir_type *ir_element_type = get_ir_type(element_type);
 455
 456         ident    *id      = id_unique("array.%u");
 457         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 458         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 459
 460         const int align = get_type_alignment_bytes(ir_element_type);
 461         set_type_alignment_bytes(ir_type, align);
 462
 463         if (type->size_constant) {
 464                 int n_elements = type->size;
 465
 466                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 467
 468                 size_t elemsize = get_type_size_bytes(ir_element_type);
 469                 if (elemsize % align > 0) {
 470                         elemsize += align - (elemsize % align);
 471                 }
 472                 set_type_size_bytes(ir_type, n_elements * elemsize);
 473         } else {
 474                 set_array_lower_bound_int(ir_type, 0, 0);
 475         }
 476         set_type_state(ir_type, layout_fixed);
 477
 478         return ir_type;
 479 }
 480
 481 /**
 482  * Return the signed integer type of size bits.
 483  *
 484  * @param size   the size
 485  */
 486 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 487                                                  unsigned size)
 488 {
 489         static ir_mode *s_modes[64 + 1] = {NULL, };
 490         ir_type *res;
 491         ir_mode *mode;
 492
 493         if (size <= 0 || size > 64)
 494                 return NULL;
 495
 496         mode = s_modes[size];
 497         if (mode == NULL) {
 498                 char name[32];
 499
 500                 snprintf(name, sizeof(name), "bf_I%u", size);
 501                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 502                                    size <= 32 ? 32 : size );
 503                 s_modes[size] = mode;
 504         }
 505
 506         char name[32];
 507         snprintf(name, sizeof(name), "I%u", size);
 508         ident *id = new_id_from_str(name);
 509         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 510         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 511         set_primitive_base_type(res, base_tp);
 512
 513         return res;
 514 }
 515
 516 /**
 517  * Return the unsigned integer type of size bits.
 518  *
 519  * @param size   the size
 520  */
 521 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 522                                                    unsigned size)
 523 {
 524         static ir_mode *u_modes[64 + 1] = {NULL, };
 525         ir_type *res;
 526         ir_mode *mode;
 527
 528         if (size <= 0 || size > 64)
 529                 return NULL;
 530
 531         mode = u_modes[size];
 532         if (mode == NULL) {
 533                 char name[32];
 534
 535                 snprintf(name, sizeof(name), "bf_U%u", size);
 536                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 537                                    size <= 32 ? 32 : size );
 538                 u_modes[size] = mode;
 539         }
 540
 541         char name[32];
 542
 543         snprintf(name, sizeof(name), "U%u", size);
 544         ident *id = new_id_from_str(name);
 545         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 546         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 547         set_primitive_base_type(res, base_tp);
 548
 549         return res;
 550 }
 551
 552 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 553 {
 554         type_t *base = skip_typeref(type->base_type);
 555         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 556         ir_type *irbase = get_ir_type(base);
 557
 558         unsigned size = type->bit_size;
 559
 560         assert(!is_type_float(base));
 561         if (is_type_signed(base)) {
 562                 return get_signed_int_type_for_bit_size(irbase, size);
 563         } else {
 564                 return get_unsigned_int_type_for_bit_size(irbase, size);
 565         }
 566 }
 567
 568 #define INVALID_TYPE ((ir_type_ptr)-1)
 569
 570 enum {
 571         COMPOUND_IS_STRUCT = false,
 572         COMPOUND_IS_UNION  = true
 573 };
 574
 575 /**
 576  * Construct firm type from ast struct type.
 577  *
 578  * As anonymous inner structs get flattened to a single firm type, we might get
 579  * irtype, outer_offset and out_align passed (they represent the position of
 580  * the anonymous inner struct inside the resulting firm struct)
 581  */
 582 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 583                                      size_t *outer_offset, size_t *outer_align,
 584                                      bool incomplete, bool is_union)
 585 {
 586         declaration_t      *declaration = type->declaration;
 587         declaration_kind_t  kind        = (declaration_kind_t)declaration->declaration_kind;
 588
 589         if (kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
 590                         || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE
 591                                 && incomplete))
 592                 return declaration->v.irtype;
 593
 594         size_t align_all  = 1;
 595         size_t offset     = 0;
 596         size_t bit_offset = 0;
 597         size_t size       = 0;
 598
 599         if (irtype == NULL) {
 600                 symbol_t *symbol = declaration->symbol;
 601                 ident    *id;
 602                 if (symbol != NULL) {
 603                         id = new_id_from_str(symbol->string);
 604                 } else {
 605                         if (is_union) {
 606                                 id = id_unique("__anonymous_union.%u");
 607                         } else {
 608                                 id = id_unique("__anonymous_struct.%u");
 609                         }
 610                 }
 611                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 612
 613                 if (is_union) {
 614                         irtype = new_d_type_union(id, dbgi);
 615                 } else {
 616                         irtype = new_d_type_struct(id, dbgi);
 617                 }
 618
 619                 declaration->declaration_kind
 620                         = DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE;
 621                 declaration->v.irtype         = irtype;
 622                 //type->base.firm_type          = irtype;
 623         } else {
 624                 offset    = *outer_offset;
 625                 align_all = *outer_align;
 626         }
 627
 628         if (incomplete)
 629                 return irtype;
 630
 631         declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE;
 632
 633         declaration_t *entry = declaration->scope.declarations;
 634         for( ; entry != NULL; entry = entry->next) {
 635                 if (entry->namespc != NAMESPACE_NORMAL)
 636                         continue;
 637
 638                 size_t prev_offset = offset;
 639
 640                 symbol_t *symbol     = entry->symbol;
 641                 type_t   *entry_type = skip_typeref(entry->type);
 642                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 643
 644                 ident    *ident;
 645                 if (symbol != NULL) {
 646                         ident = new_id_from_str(symbol->string);
 647                 } else {
 648                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 649                                 create_compound_type(&entry_type->compound, irtype, &offset,
 650                                                      &align_all, false, COMPOUND_IS_STRUCT);
 651                                 goto finished_member;
 652                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 653                                 create_compound_type(&entry_type->compound, irtype, &offset,
 654                                                      &align_all, false, COMPOUND_IS_UNION);
 655                                 goto finished_member;
 656                         } else {
 657                                 assert(entry_type->kind == TYPE_BITFIELD);
 658                         }
 659                         ident = id_unique("anon.%u");
 660                 }
 661
 662                 ir_type *base_irtype;
 663                 if (entry_type->kind == TYPE_BITFIELD) {
 664                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 665                 } else {
 666                         base_irtype = get_ir_type(entry_type);
 667                 }
 668
 669                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 670                 size_t misalign        = offset % entry_alignment;
 671
 672                 ir_type   *entry_irtype = get_ir_type(entry_type);
 673                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 674
 675                 size_t base;
 676                 size_t bits_remainder;
 677                 if (entry_type->kind == TYPE_BITFIELD) {
 678                         size_t size_bits      = entry_type->bitfield.bit_size;
 679                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 680
 681                         if (size_bits > rest_size_bits) {
 682                                 /* start a new bucket */
 683                                 offset     += entry_alignment - misalign;
 684                                 bit_offset  = 0;
 685
 686                                 base           = offset;
 687                                 bits_remainder = 0;
 688                         } else {
 689                                 /* put into current bucket */
 690                                 base           = offset - misalign;
 691                                 bits_remainder = misalign * 8 + bit_offset;
 692                         }
 693
 694                         offset     += size_bits / 8;
 695                         bit_offset  = bit_offset + (size_bits % 8);
 696                 } else {
 697                         size_t entry_size = get_type_size_bytes(base_irtype);
 698                         if (misalign > 0 || bit_offset > 0)
 699                                 offset += entry_alignment - misalign;
 700
 701                         base           = offset;
 702                         bits_remainder = 0;
 703                         offset        += entry_size;
 704                         bit_offset     = 0;
 705                 }
 706
 707                 if (entry_alignment > align_all) {
 708                         if (entry_alignment % align_all != 0) {
 709                                 panic("uneven alignments not supported yet");
 710                         }
 711                         align_all = entry_alignment;
 712                 }
 713
 714                 set_entity_offset(entity, base);
 715                 set_entity_offset_bits_remainder(entity,
 716                                                  (unsigned char) bits_remainder);
 717                 //add_struct_member(irtype, entity);
 718                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 719                 assert(entry->v.entity == NULL);
 720                 entry->v.entity         = entity;
 721
 722 finished_member:
 723                 if (is_union) {
 724                         size_t entry_size = offset - prev_offset;
 725                         if (entry_size > size) {
 726                                 size = entry_size;
 727                         }
 728                         offset     = 0;
 729                         bit_offset = 0;
 730                 }
 731         }
 732
 733         if (!is_union) {
 734                 size = offset;
 735         }
 736
 737         size_t misalign = offset % align_all;
 738         if (misalign > 0 || bit_offset > 0) {
 739                 size += align_all - misalign;
 740         }
 741
 742         if (outer_offset != NULL) {
 743                 if (!is_union) {
 744                         *outer_offset = offset;
 745                 } else {
 746                         *outer_offset += size;
 747                 }
 748
 749                 if (align_all > *outer_align) {
 750                         if (align_all % *outer_align != 0) {
 751                                 panic("uneven alignments not supported yet");
 752                         }
 753                         *outer_align = align_all;
 754                 }
 755         } else {
 756                 set_type_alignment_bytes(irtype, align_all);
 757                 set_type_size_bytes(irtype, size);
 758                 set_type_state(irtype, layout_fixed);
 759         }
 760
 761         return irtype;
 762 }
 763
 764 static ir_type *create_enum_type(enum_type_t *const type)
 765 {
 766         type->base.firm_type = ir_type_int;
 767
 768         ir_mode *const mode    = mode_int;
 769         tarval  *const one     = get_mode_one(mode);
 770         tarval  *      tv_next = get_tarval_null(mode);
 771
 772         bool constant_folding_old = constant_folding;
 773         constant_folding = true;
 774
 775         declaration_t *declaration = type->declaration->next;
 776         for (; declaration != NULL; declaration = declaration->next) {
 777                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 778                         break;
 779
 780                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 781
 782                 expression_t *const init = declaration->init.enum_value;
 783                 if (init != NULL) {
 784                         ir_node *const cnst = expression_to_firm(init);
 785                         if (!is_Const(cnst)) {
 786                                 panic("couldn't fold constant");
 787                         }
 788                         tv_next = get_Const_tarval(cnst);
 789                 }
 790                 declaration->v.enum_val = tv_next;
 791                 tv_next = tarval_add(tv_next, one);
 792         }
 793
 794         constant_folding = constant_folding_old;
 795
 796         return ir_type_int;
 797 }
 798
 799 static ir_type *get_ir_type_incomplete(type_t *type)
 800 {
 801         assert(type != NULL);
 802         type = skip_typeref(type);
 803
 804         if (type->base.firm_type != NULL) {
 805                 assert(type->base.firm_type != INVALID_TYPE);
 806                 return type->base.firm_type;
 807         }
 808
 809         switch (type->kind) {
 810         case TYPE_COMPOUND_STRUCT:
 811                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 812                                             true, COMPOUND_IS_STRUCT);
 813         case TYPE_COMPOUND_UNION:
 814                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 815                                             true, COMPOUND_IS_UNION);
 816         default:
 817                 return get_ir_type(type);
 818         }
 819 }
 820
 821 static ir_type *get_ir_type(type_t *type)
 822 {
 823         assert(type != NULL);
 824
 825         type = skip_typeref(type);
 826
 827         if (type->base.firm_type != NULL) {
 828                 assert(type->base.firm_type != INVALID_TYPE);
 829                 return type->base.firm_type;
 830         }
 831
 832         ir_type *firm_type = NULL;
 833         switch (type->kind) {
 834         case TYPE_ERROR:
 835                 /* Happens while constant folding, when there was an error */
 836                 return create_atomic_type(&type_void->atomic);
 837
 838         case TYPE_ATOMIC:
 839                 firm_type = create_atomic_type(&type->atomic);
 840                 break;
 841         case TYPE_COMPLEX:
 842                 firm_type = create_complex_type(&type->complex);
 843                 break;
 844         case TYPE_IMAGINARY:
 845                 firm_type = create_imaginary_type(&type->imaginary);
 846                 break;
 847         case TYPE_FUNCTION:
 848                 firm_type = create_method_type(&type->function);
 849                 break;
 850         case TYPE_POINTER:
 851                 firm_type = create_pointer_type(&type->pointer);
 852                 break;
 853         case TYPE_ARRAY:
 854                 firm_type = create_array_type(&type->array);
 855                 break;
 856         case TYPE_COMPOUND_STRUCT:
 857                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 858                                                  false, COMPOUND_IS_STRUCT);
 859                 break;
 860         case TYPE_COMPOUND_UNION:
 861                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 862                                                  false, COMPOUND_IS_UNION);
 863                 break;
 864         case TYPE_ENUM:
 865                 firm_type = create_enum_type(&type->enumt);
 866                 break;
 867         case TYPE_BUILTIN:
 868                 firm_type = get_ir_type(type->builtin.real_type);
 869                 break;
 870         case TYPE_BITFIELD:
 871                 firm_type = create_bitfield_type(&type->bitfield);
 872                 break;
 873
 874         case TYPE_TYPEOF:
 875         case TYPE_TYPEDEF:
 876         case TYPE_INVALID:
 877                 break;
 878         }
 879         if (firm_type == NULL)
 880                 panic("unknown type found");
 881
 882         type->base.firm_type = firm_type;
 883         return firm_type;
 884 }
 885
 886 static inline ir_mode *get_ir_mode(type_t *type)
 887 {
 888         ir_type *irtype = get_ir_type(type);
 889
 890         /* firm doesn't report a mode for arrays somehow... */
 891         if (is_Array_type(irtype)) {
 892                 return mode_P_data;
 893         }
 894
 895         ir_mode *mode = get_type_mode(irtype);
 896         assert(mode != NULL);
 897         return mode;
 898 }
 899
 900 /** Names of the runtime functions. */
 901 static const struct {
 902         int        id;           /**< the rts id */
 903         int        n_res;        /**< number of return values */
 904         const char *name;        /**< the name of the rts function */
 905         int        n_params;     /**< number of parameters */
 906         unsigned   flags;        /**< language flags */
 907 } rts_data[] = {
 908         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 909         { rts_abort,      0, "abort",        0, _C89 },
 910         { rts_alloca,     1, "alloca",       1, _ALL },
 911         { rts_abs,        1, "abs",          1, _C89 },
 912         { rts_labs,       1, "labs",         1, _C89 },
 913         { rts_llabs,      1, "llabs",        1, _C99 },
 914         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 915
 916         { rts_fabs,       1, "fabs",         1, _C89 },
 917         { rts_sqrt,       1, "sqrt",         1, _C89 },
 918         { rts_cbrt,       1, "cbrt",         1, _C99 },
 919         { rts_exp,        1, "exp",          1, _C89 },
 920         { rts_exp2,       1, "exp2",         1, _C89 },
 921         { rts_exp10,      1, "exp10",        1, _GNUC },
 922         { rts_log,        1, "log",          1, _C89 },
 923         { rts_log2,       1, "log2",         1, _C89 },
 924         { rts_log10,      1, "log10",        1, _C89 },
 925         { rts_pow,        1, "pow",          2, _C89 },
 926         { rts_sin,        1, "sin",          1, _C89 },
 927         { rts_cos,        1, "cos",          1, _C89 },
 928         { rts_tan,        1, "tan",          1, _C89 },
 929         { rts_asin,       1, "asin",         1, _C89 },
 930         { rts_acos,       1, "acos",         1, _C89 },
 931         { rts_atan,       1, "atan",         1, _C89 },
 932         { rts_sinh,       1, "sinh",         1, _C89 },
 933         { rts_cosh,       1, "cosh",         1, _C89 },
 934         { rts_tanh,       1, "tanh",         1, _C89 },
 935
 936         { rts_fabsf,      1, "fabsf",        1, _C99 },
 937         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 938         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 939         { rts_expf,       1, "expf",         1, _C99 },
 940         { rts_exp2f,      1, "exp2f",        1, _C99 },
 941         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 942         { rts_logf,       1, "logf",         1, _C99 },
 943         { rts_log2f,      1, "log2f",        1, _C99 },
 944         { rts_log10f,     1, "log10f",       1, _C99 },
 945         { rts_powf,       1, "powf",         2, _C99 },
 946         { rts_sinf,       1, "sinf",         1, _C99 },
 947         { rts_cosf,       1, "cosf",         1, _C99 },
 948         { rts_tanf,       1, "tanf",         1, _C99 },
 949         { rts_asinf,      1, "asinf",        1, _C99 },
 950         { rts_acosf,      1, "acosf",        1, _C99 },
 951         { rts_atanf,      1, "atanf",        1, _C99 },
 952         { rts_sinhf,      1, "sinhf",        1, _C99 },
 953         { rts_coshf,      1, "coshf",        1, _C99 },
 954         { rts_tanhf,      1, "tanhf",        1, _C99 },
 955
 956         { rts_fabsl,      1, "fabsl",        1, _C99 },
 957         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 958         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 959         { rts_expl,       1, "expl",         1, _C99 },
 960         { rts_exp2l,      1, "exp2l",        1, _C99 },
 961         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 962         { rts_logl,       1, "logl",         1, _C99 },
 963         { rts_log2l,      1, "log2l",        1, _C99 },
 964         { rts_log10l,     1, "log10l",       1, _C99 },
 965         { rts_powl,       1, "powl",         2, _C99 },
 966         { rts_sinl,       1, "sinl",         1, _C99 },
 967         { rts_cosl,       1, "cosl",         1, _C99 },
 968         { rts_tanl,       1, "tanl",         1, _C99 },
 969         { rts_asinl,      1, "asinl",        1, _C99 },
 970         { rts_acosl,      1, "acosl",        1, _C99 },
 971         { rts_atanl,      1, "atanl",        1, _C99 },
 972         { rts_sinhl,      1, "sinhl",        1, _C99 },
 973         { rts_coshl,      1, "coshl",        1, _C99 },
 974         { rts_tanhl,      1, "tanhl",        1, _C99 },
 975
 976         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 977         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 978         { rts_strcmp,     1, "strcmp",       2, _C89 },
 979         { rts_strncmp,    1, "strncmp",      3, _C89 }
 980 };
 981
 982 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 983
 984 /**
 985  * Mangles an entity linker (ld) name for win32 usage.
 986  *
 987  * @param ent          the entity to be mangled
 988  * @param declaration  the declaration
 989  */
 990 static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration)
 991 {
 992         ident *id;
 993
 994         if (is_Method_type(get_entity_type(ent)))
 995                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 996         else {
 997                 /* always add an underscore in win32 */
 998                 id = mangle(id_underscore, get_entity_ident(ent));
 999         }
1000
1001         decl_modifiers_t decl_modifiers = declaration->modifiers;
1002         if (decl_modifiers & DM_DLLIMPORT) {
1003                 /* add prefix for imported symbols */
1004                 id = mangle(id_imp, id);
1005         }
1006         return id;
1007 }
1008
1009 /**
1010  * Mangles an entity linker (ld) name for Linux ELF usage.
1011  *
1012  * @param ent          the entity to be mangled
1013  * @param declaration  the declaration
1014  */
1015 static ident *create_ld_ident_linux_elf(ir_entity *entity,
1016                                         declaration_t *declaration)
1017 {
1018         (void) declaration;
1019         return get_entity_ident(entity);
1020 }
1021
1022 /**
1023  * Mangles an entity linker (ld) name for Mach-O usage.
1024  *
1025  * @param ent          the entity to be mangled
1026  * @param declaration  the declaration
1027  */
1028 static ident *create_ld_ident_macho(ir_entity *ent, declaration_t *declaration)
1029 {
1030         (void) declaration;
1031         ident *id = mangle(id_underscore, get_entity_ident(ent));
1032         return id;
1033 }
1034
1035 typedef ident* (*create_ld_ident_func)(ir_entity *entity,
1036                                        declaration_t *declaration);
1037 create_ld_ident_func  create_ld_ident = create_ld_ident_linux_elf;
1038
1039 /**
1040  * Handle GNU attributes for entities
1041  *
1042  * @param ent   the entity
1043  * @param decl  the routine declaration
1044  */
1045 static void handle_gnu_attributes_ent(ir_entity *ent, declaration_t *decl)
1046 {
1047         if (decl->modifiers & DM_PURE) {
1048                 /* TRUE if the declaration includes the GNU
1049                    __attribute__((pure)) specifier. */
1050                 set_entity_additional_property(ent, mtp_property_pure);
1051         }
1052         if (decl->modifiers & DM_CONST) {
1053                 set_entity_additional_property(ent, mtp_property_const);
1054                 have_const_functions = true;
1055         }
1056         if (decl->modifiers & DM_USED) {
1057                 /* TRUE if the declaration includes the GNU
1058                    __attribute__((used)) specifier. */
1059                 set_entity_stickyness(ent, stickyness_sticky);
1060         }
1061 }
1062
1063 /**
1064  * Creates an entity representing a function.
1065  *
1066  * @param declaration  the function declaration
1067  */
1068 static ir_entity *get_function_entity(declaration_t *declaration)
1069 {
1070         if (declaration->declaration_kind == DECLARATION_KIND_FUNCTION ||
1071             declaration->declaration_kind == DECLARATION_KIND_INNER_FUNCTION)
1072                 return declaration->v.entity;
1073         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
1074
1075         symbol_t *symbol = declaration->symbol;
1076         ident    *id     = new_id_from_str(symbol->string);
1077
1078         ir_type  *global_type    = get_glob_type();
1079         ir_type  *ir_type_method = get_ir_type(declaration->type);
1080         assert(is_Method_type(ir_type_method));
1081
1082         /* already an entity defined? */
1083         ir_entity *entity = entitymap_get(&entitymap, symbol);
1084         if (entity != NULL) {
1085                 if (get_entity_visibility(entity) == visibility_external_allocated
1086                                 && declaration->init.statement != NULL) {
1087                         set_entity_visibility(entity, visibility_external_visible);
1088                 }
1089                 goto entity_created;
1090         }
1091
1092         dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
1093         entity               = new_d_entity(global_type, id, ir_type_method, dbgi);
1094         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
1095
1096         handle_gnu_attributes_ent(entity, declaration);
1097
1098         /* static inline             => local
1099          * extern inline             => local
1100          * inline without definition => local
1101          * inline with definition    => external_visible */
1102         storage_class_tag_t const storage_class = (storage_class_tag_t)declaration->storage_class;
1103         bool                const is_inline     = declaration->is_inline;
1104         bool                const has_body      = declaration->init.statement != NULL;
1105         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1106                 set_entity_visibility(entity, visibility_external_visible);
1107         } else if (storage_class == STORAGE_CLASS_STATIC ||
1108                    (is_inline && has_body)) {
1109                 if (!has_body) {
1110                         /* this entity was declared, but is defined nowhere */
1111                         set_entity_peculiarity(entity, peculiarity_description);
1112                 }
1113                 set_entity_visibility(entity, visibility_local);
1114         } else if (has_body) {
1115                 set_entity_visibility(entity, visibility_external_visible);
1116         } else {
1117                 set_entity_visibility(entity, visibility_external_allocated);
1118         }
1119         set_entity_allocation(entity, allocation_static);
1120
1121         /* We should check for file scope here, but as long as we compile C only
1122            this is not needed. */
1123         if (! firm_opt.freestanding) {
1124                 /* check for a known runtime function */
1125                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1126                         if (id != rts_idents[i])
1127                                 continue;
1128
1129                         /* ignore those rts functions not necessary needed for current mode */
1130                         if ((c_mode & rts_data[i].flags) == 0)
1131                                 continue;
1132                         assert(rts_entities[rts_data[i].id] == NULL);
1133                         rts_entities[rts_data[i].id] = entity;
1134                 }
1135         }
1136
1137         entitymap_insert(&entitymap, symbol, entity);
1138
1139 entity_created:
1140         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1141         declaration->v.entity         = entity;
1142
1143         return entity;
1144 }
1145
1146 /**
1147  * Creates a Const node representing a constant.
1148  */
1149 static ir_node *const_to_firm(const const_expression_t *cnst)
1150 {
1151         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1152         ir_mode  *mode = get_ir_mode(cnst->base.type);
1153
1154         char    buf[128];
1155         tarval *tv;
1156         size_t  len;
1157         if (mode_is_float(mode)) {
1158                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1159         } else {
1160                 if (mode_is_signed(mode)) {
1161                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1162                 } else {
1163                         len = snprintf(buf, sizeof(buf), "%llu",
1164                                        (unsigned long long) cnst->v.int_value);
1165                 }
1166                 tv = new_tarval_from_str(buf, len, mode);
1167         }
1168
1169         return new_d_Const(dbgi, mode, tv);
1170 }
1171
1172 /**
1173  * Creates a Const node representing a character constant.
1174  */
1175 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1176 {
1177         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1178         ir_mode  *mode = get_ir_mode(cnst->base.type);
1179
1180         long long int v = 0;
1181         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1182                 if (char_is_signed) {
1183                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1184                 } else {
1185                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1186                 }
1187         }
1188         char    buf[128];
1189         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1190         tarval *tv = new_tarval_from_str(buf, len, mode);
1191
1192         return new_d_Const(dbgi, mode, tv);
1193 }
1194
1195 /**
1196  * Creates a Const node representing a wide character constant.
1197  */
1198 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1199 {
1200         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1201         ir_mode  *mode = get_ir_mode(cnst->base.type);
1202
1203         long long int v = cnst->v.wide_character.begin[0];
1204
1205         char    buf[128];
1206         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1207         tarval *tv = new_tarval_from_str(buf, len, mode);
1208
1209         return new_d_Const(dbgi, mode, tv);
1210 }
1211
1212 /**
1213  * Creates a SymConst for a given entity.
1214  *
1215  * @param dbgi    debug info
1216  * @param mode    the (reference) mode for the SymConst
1217  * @param entity  the entity
1218  */
1219 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1220                               ir_entity *entity)
1221 {
1222         assert(entity != NULL);
1223         union symconst_symbol sym;
1224         sym.entity_p = entity;
1225         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1226 }
1227
1228 /**
1229  * Creates a SymConst node representing a string constant.
1230  *
1231  * @param src_pos    the source position of the string constant
1232  * @param id_prefix  a prefix for the name of the generated string constant
1233  * @param value      the value of the string constant
1234  */
1235 static ir_node *string_to_firm(const source_position_t *const src_pos,
1236                                const char *const id_prefix,
1237                                const string_t *const value)
1238 {
1239         ir_type  *const global_type = get_glob_type();
1240         dbg_info *const dbgi        = get_dbg_info(src_pos);
1241         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1242                                                        ir_type_const_char, dbgi);
1243
1244         ident     *const id     = id_unique(id_prefix);
1245         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1246         set_entity_ld_ident(entity, id);
1247         set_entity_variability(entity, variability_constant);
1248         set_entity_allocation(entity, allocation_static);
1249
1250         ir_type *const elem_type = ir_type_const_char;
1251         ir_mode *const mode      = get_type_mode(elem_type);
1252
1253         const char* const string = value->begin;
1254         const size_t      slen   = value->size;
1255
1256         set_array_lower_bound_int(type, 0, 0);
1257         set_array_upper_bound_int(type, 0, slen);
1258         set_type_size_bytes(type, slen);
1259         set_type_state(type, layout_fixed);
1260
1261         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1262         for(size_t i = 0; i < slen; ++i) {
1263                 tvs[i] = new_tarval_from_long(string[i], mode);
1264         }
1265
1266         set_array_entity_values(entity, tvs, slen);
1267         free(tvs);
1268
1269         return create_symconst(dbgi, mode_P_data, entity);
1270 }
1271
1272 /**
1273  * Creates a SymConst node representing a string literal.
1274  *
1275  * @param literal   the string literal
1276  */
1277 static ir_node *string_literal_to_firm(
1278                 const string_literal_expression_t* literal)
1279 {
1280         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1281                               &literal->value);
1282 }
1283
1284 /**
1285  * Creates a SymConst node representing a wide string literal.
1286  *
1287  * @param literal   the wide string literal
1288  */
1289 static ir_node *wide_string_literal_to_firm(
1290         const wide_string_literal_expression_t* const literal)
1291 {
1292         ir_type *const global_type = get_glob_type();
1293         ir_type *const elem_type   = ir_type_wchar_t;
1294         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1295         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1296                                                     elem_type, dbgi);
1297
1298         ident     *const id     = id_unique("Lstr.%u");
1299         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1300         set_entity_ld_ident(entity, id);
1301         set_entity_variability(entity, variability_constant);
1302         set_entity_allocation(entity, allocation_static);
1303
1304         ir_mode *const mode      = get_type_mode(elem_type);
1305
1306         const wchar_rep_t *const string = literal->value.begin;
1307         const size_t             slen   = literal->value.size;
1308
1309         set_array_lower_bound_int(type, 0, 0);
1310         set_array_upper_bound_int(type, 0, slen);
1311         set_type_size_bytes(type, slen);
1312         set_type_state(type, layout_fixed);
1313
1314         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1315         for(size_t i = 0; i < slen; ++i) {
1316                 tvs[i] = new_tarval_from_long(string[i], mode);
1317         }
1318
1319         set_array_entity_values(entity, tvs, slen);
1320         free(tvs);
1321
1322         return create_symconst(dbgi, mode_P_data, entity);
1323 }
1324
1325 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1326                                       ir_node *const addr)
1327 {
1328         ir_type *irtype = get_ir_type(type);
1329         if (is_compound_type(irtype)
1330                         || is_Method_type(irtype)
1331                         || is_Array_type(irtype)) {
1332                 return addr;
1333         }
1334
1335         ir_mode *const mode     = get_type_mode(irtype);
1336         ir_node *const memory   = get_store();
1337         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1338         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1339         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1340
1341         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1342                 set_Load_volatility(load, volatility_is_volatile);
1343         }
1344
1345         set_store(load_mem);
1346         return load_res;
1347 }
1348
1349 /**
1350  * Creates a strict Conv if neccessary.
1351  */
1352 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1353 {
1354         ir_mode *mode = get_irn_mode(node);
1355
1356         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1357                 return node;
1358         if (!mode_is_float(mode))
1359                 return node;
1360
1361         /* check if there is already a Conv */
1362         if (is_Conv(node)) {
1363                 /* convert it into a strict Conv */
1364                 set_Conv_strict(node, 1);
1365                 return node;
1366         }
1367
1368         /* otherwise create a new one */
1369         return new_d_strictConv(dbgi, node, mode);
1370 }
1371
1372 static ir_node *get_global_var_address(dbg_info *const dbgi,
1373                                        const declaration_t *const decl)
1374 {
1375         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1376
1377         ir_entity *const entity = decl->v.entity;
1378         switch ((storage_class_tag_t)decl->storage_class) {
1379                 case STORAGE_CLASS_THREAD:
1380                 case STORAGE_CLASS_THREAD_EXTERN:
1381                 case STORAGE_CLASS_THREAD_STATIC: {
1382                         ir_node *const no_mem = new_NoMem();
1383                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1384                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1385                 }
1386
1387                 default:
1388                         return create_symconst(dbgi, mode_P_data, entity);
1389         }
1390 }
1391
1392 /**
1393  * Returns the correct base address depending on whether it is a parameter or a
1394  * normal local variable.
1395  */
1396 static ir_node *get_local_frame(ir_entity *const ent)
1397 {
1398         ir_graph      *const irg   = current_ir_graph;
1399         const ir_type *const owner = get_entity_owner(ent);
1400         if (owner == get_irg_frame_type(irg)) {
1401                 return get_irg_frame(irg);
1402         } else {
1403                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1404                 return get_irg_value_param_base(irg);
1405         }
1406 }
1407
1408 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1409 {
1410         ir_mode *value_mode = get_irn_mode(value);
1411
1412         if (value_mode == dest_mode || is_Bad(value))
1413                 return value;
1414
1415         if (dest_mode == mode_b) {
1416                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1417                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1418                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1419                 return proj;
1420         }
1421
1422         return new_d_Conv(dbgi, value, dest_mode);
1423 }
1424
1425 /**
1426  * Keep all memory edges of the given block.
1427  */
1428 static void keep_all_memory(ir_node *block) {
1429         ir_node *old = get_cur_block();
1430
1431         set_cur_block(block);
1432         keep_alive(get_store());
1433         /* TODO: keep all memory edges from restricted pointers */
1434         set_cur_block(old);
1435 }
1436
1437 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1438 {
1439         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1440         declaration_t *declaration = ref->declaration;
1441         type_t        *type        = skip_typeref(declaration->type);
1442
1443         /* make sure the type is constructed */
1444         (void) get_ir_type(type);
1445
1446         switch ((declaration_kind_t)declaration->declaration_kind) {
1447         case DECLARATION_KIND_TYPE:
1448         case DECLARATION_KIND_UNKNOWN:
1449                 break;
1450
1451         case DECLARATION_KIND_ENUM_ENTRY: {
1452                 ir_mode *const mode = get_ir_mode(type);
1453                 if (ref->is_outer_ref) {
1454                         /* reference to an outer variable */
1455                         panic("Outer variable reference not implemented");
1456                 } else {
1457                         return new_Const(mode, declaration->v.enum_val);
1458                 }
1459         }
1460
1461         case DECLARATION_KIND_LOCAL_VARIABLE: {
1462                 ir_mode *const mode = get_ir_mode(type);
1463                 return get_value(declaration->v.value_number, mode);
1464         }
1465         case DECLARATION_KIND_FUNCTION: {
1466                 ir_mode *const mode = get_ir_mode(type);
1467                 return create_symconst(dbgi, mode, declaration->v.entity);
1468         }
1469         case DECLARATION_KIND_INNER_FUNCTION: {
1470                 ir_mode *const mode = get_ir_mode(type);
1471                 if (! declaration->goto_to_outer && !declaration->need_closure) {
1472                         /* inner function not using the closure */
1473                         return create_symconst(dbgi, mode, declaration->v.entity);
1474                 } else {
1475                         /* TODO: need trampoline here */
1476                         panic("Trampoline code not implemented");
1477                         return create_symconst(dbgi, mode, declaration->v.entity);
1478                 }
1479         }
1480         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1481                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1482                 return deref_address(dbgi, declaration->type, addr);
1483         }
1484
1485         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1486                 ir_entity *entity = declaration->v.entity;
1487                 ir_node   *frame  = get_local_frame(entity);
1488                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1489                 return deref_address(dbgi, declaration->type, sel);
1490         }
1491
1492         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1493                 return declaration->v.vla_base;
1494
1495         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1496         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1497         case DECLARATION_KIND_COMPOUND_MEMBER:
1498         case DECLARATION_KIND_LABEL_BLOCK:
1499                 panic("not implemented reference type");
1500         }
1501
1502         panic("reference to declaration with unknown type found");
1503 }
1504
1505 static ir_node *reference_addr(const reference_expression_t *ref)
1506 {
1507         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1508         declaration_t *declaration = ref->declaration;
1509
1510         switch((declaration_kind_t) declaration->declaration_kind) {
1511         case DECLARATION_KIND_TYPE:
1512         case DECLARATION_KIND_UNKNOWN:
1513                 break;
1514         case DECLARATION_KIND_LOCAL_VARIABLE:
1515                 /* you can store to a local variable (so we don't panic but return NULL
1516                  * as an indicator for no real address) */
1517                 return NULL;
1518         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1519                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1520                 return addr;
1521         }
1522         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1523                 ir_entity *entity = declaration->v.entity;
1524                 ir_node   *frame  = get_local_frame(entity);
1525                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1526
1527                 return sel;
1528         }
1529
1530         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1531                 return declaration->v.vla_base;
1532
1533         case DECLARATION_KIND_ENUM_ENTRY:
1534                 panic("trying to reference enum entry");
1535
1536         case DECLARATION_KIND_FUNCTION:
1537         case DECLARATION_KIND_INNER_FUNCTION:
1538         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1539         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1540         case DECLARATION_KIND_COMPOUND_MEMBER:
1541         case DECLARATION_KIND_LABEL_BLOCK:
1542                 panic("not implemented reference type");
1543         }
1544
1545         panic("reference to declaration with unknown type found");
1546 }
1547
1548 /**
1549  * Transform calls to builtin functions.
1550  */
1551 static ir_node *process_builtin_call(const call_expression_t *call)
1552 {
1553         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1554
1555         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1556         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1557
1558         type_t *type = skip_typeref(builtin->base.type);
1559         assert(is_type_pointer(type));
1560
1561         type_t   *function_type = skip_typeref(type->pointer.points_to);
1562         symbol_t *symbol        = builtin->symbol;
1563
1564         switch(symbol->ID) {
1565         case T___builtin_alloca: {
1566                 if (call->arguments == NULL || call->arguments->next != NULL) {
1567                         panic("invalid number of parameters on __builtin_alloca");
1568                 }
1569                 expression_t *argument = call->arguments->expression;
1570                 ir_node      *size     = expression_to_firm(argument);
1571
1572                 ir_node *store  = get_store();
1573                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1574                                               stack_alloc);
1575                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1576                 set_store(proj_m);
1577                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1578
1579                 return res;
1580         }
1581
1582         case T___builtin_huge_val:
1583         case T___builtin_inf:
1584         case T___builtin_inff:
1585         case T___builtin_infl: {
1586                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1587                 tarval  *tv   = get_mode_infinite(mode);
1588                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1589                 return   res;
1590         }
1591         case T___builtin_nan:
1592         case T___builtin_nanf:
1593         case T___builtin_nanl: {
1594                 /* Ignore string for now... */
1595                 assert(is_type_function(function_type));
1596                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1597                 tarval  *tv   = get_mode_NAN(mode);
1598                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1599                 return res;
1600         }
1601         case T___builtin_va_end:
1602                 return NULL;
1603         default:
1604                 panic("Unsupported builtin found\n");
1605         }
1606 }
1607
1608 /**
1609  * Transform a call expression.
1610  * Handles some special cases, like alloca() calls, which must be resolved
1611  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1612  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1613  * handled right...
1614  */
1615 static ir_node *call_expression_to_firm(const call_expression_t *call)
1616 {
1617         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1618         assert(get_cur_block() != NULL);
1619
1620         expression_t *function = call->function;
1621         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1622                 return process_builtin_call(call);
1623         }
1624         if (function->kind == EXPR_REFERENCE) {
1625                 const reference_expression_t *ref = &function->reference;
1626                 declaration_t *declaration = ref->declaration;
1627
1628                 if ((declaration_kind_t)declaration->declaration_kind == DECLARATION_KIND_FUNCTION) {
1629                         if (declaration->v.entity == rts_entities[rts_alloca]) {
1630                                 /* handle alloca() call */
1631                                 expression_t *argument = call->arguments->expression;
1632                                 ir_node      *size     = expression_to_firm(argument);
1633
1634                                 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1635
1636                                 ir_node  *store  = get_store();
1637                                 dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1638                                 ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1639                                                                stack_alloc);
1640                                 ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1641                                 set_store(proj_m);
1642                                 ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1643
1644                                 return res;
1645                         }
1646                 }
1647         }
1648         ir_node *callee = expression_to_firm(function);
1649
1650         type_t *type = skip_typeref(function->base.type);
1651         assert(is_type_pointer(type));
1652         pointer_type_t *pointer_type = &type->pointer;
1653         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1654         assert(is_type_function(points_to));
1655         function_type_t *function_type = &points_to->function;
1656
1657         int      n_parameters = 0;
1658         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1659         ir_type *new_method_type = NULL;
1660         if (function_type->variadic || function_type->unspecified_parameters) {
1661                 const call_argument_t *argument = call->arguments;
1662                 for( ; argument != NULL; argument = argument->next) {
1663                         ++n_parameters;
1664                 }
1665
1666                 /* we need to construct a new method type matching the call
1667                  * arguments... */
1668                 int n_res       = get_method_n_ress(ir_method_type);
1669                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1670                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1671                                                     n_parameters, n_res, dbgi);
1672                 set_method_calling_convention(new_method_type,
1673                                get_method_calling_convention(ir_method_type));
1674                 set_method_additional_properties(new_method_type,
1675                                get_method_additional_properties(ir_method_type));
1676                 set_method_variadicity(new_method_type,
1677                                        get_method_variadicity(ir_method_type));
1678
1679                 for(int i = 0; i < n_res; ++i) {
1680                         set_method_res_type(new_method_type, i,
1681                                             get_method_res_type(ir_method_type, i));
1682                 }
1683                 argument = call->arguments;
1684                 for(int i = 0; i < n_parameters; ++i, argument = argument->next) {
1685                         expression_t *expression = argument->expression;
1686                         ir_type      *irtype     = get_ir_type(expression->base.type);
1687                         set_method_param_type(new_method_type, i, irtype);
1688                 }
1689                 ir_method_type = new_method_type;
1690         } else {
1691                 n_parameters = get_method_n_params(ir_method_type);
1692         }
1693
1694         ir_node *in[n_parameters];
1695
1696         const call_argument_t *argument = call->arguments;
1697         for(int n = 0; n < n_parameters; ++n) {
1698                 expression_t *expression = argument->expression;
1699                 ir_node      *arg_node   = expression_to_firm(expression);
1700
1701                 arg_node = do_strict_conv(dbgi, arg_node);
1702
1703                 in[n] = arg_node;
1704
1705                 argument = argument->next;
1706         }
1707
1708         ir_node  *store = get_store();
1709         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1710                                      ir_method_type);
1711         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1712         set_store(mem);
1713
1714         type_t  *return_type = skip_typeref(function_type->return_type);
1715         ir_node *result      = NULL;
1716
1717         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1718                 ir_mode *mode;
1719                 if (is_type_scalar(return_type)) {
1720                         mode = get_ir_mode(return_type);
1721                 } else {
1722                         mode = mode_P_data;
1723                 }
1724                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1725                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1726         }
1727
1728         if (function->kind == EXPR_REFERENCE &&
1729             function->reference.declaration->modifiers & DM_NORETURN) {
1730                 /* A dead end:  Keep the Call and the Block.  Also place all further
1731                  * nodes into a new and unreachable block. */
1732                 keep_alive(node);
1733                 keep_alive(get_cur_block());
1734                 new_Block(0, NULL);
1735         }
1736
1737         return result;
1738 }
1739
1740 static void statement_to_firm(statement_t *statement);
1741 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1742
1743 static ir_node *expression_to_addr(const expression_t *expression);
1744 static ir_node *create_condition_evaluation(const expression_t *expression,
1745                                             ir_node *true_block,
1746                                             ir_node *false_block);
1747
1748 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1749                          ir_node *value)
1750 {
1751         value = do_strict_conv(dbgi, value);
1752
1753         ir_node *memory = get_store();
1754
1755         if (is_type_scalar(type)) {
1756                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1757                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1758                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1759                         set_Store_volatility(store, volatility_is_volatile);
1760                 set_store(store_mem);
1761         } else {
1762                 ir_type *irtype    = get_ir_type(type);
1763                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1764                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1765                 set_store(copyb_mem);
1766         }
1767 }
1768
1769 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1770 {
1771         tarval *all_one   = get_mode_all_one(mode);
1772         int     mode_size = get_mode_size_bits(mode);
1773
1774         assert(offset >= 0);
1775         assert(size   >= 0);
1776         assert(offset + size <= mode_size);
1777         if (size == mode_size) {
1778                 return all_one;
1779         }
1780
1781         long    shiftr    = get_mode_size_bits(mode) - size;
1782         long    shiftl    = offset;
1783         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1784         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1785         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1786         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1787
1788         return mask1;
1789 }
1790
1791 static void bitfield_store_to_firm(const select_expression_t *expression,
1792                                    ir_node *addr, ir_node *value)
1793 {
1794         type_t       *type   = expression->base.type;
1795         ir_mode      *mode   = get_ir_mode(type);
1796
1797         assert(get_irn_mode(value) == mode || is_Bad(value));
1798
1799         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1800
1801         /* kill upper bits of value and shift to right position */
1802         ir_entity *entity       = expression->compound_entry->v.entity;
1803         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1804         ir_type   *entity_type  = get_entity_type(entity);
1805         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1806
1807         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1808         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1809         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1810         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1811         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1812         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1813
1814         /* load current value */
1815         ir_node  *mem             = get_store();
1816         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1817         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1818         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1819         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1820         tarval   *inv_mask        = tarval_not(shift_mask);
1821         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1822         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1823
1824         /* construct new value and store */
1825         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1826         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1827         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1828         set_store(store_mem);
1829
1830         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1831                 set_Load_volatility(load, volatility_is_volatile);
1832                 set_Store_volatility(store, volatility_is_volatile);
1833         }
1834 }
1835
1836 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1837                 ir_node *addr)
1838 {
1839         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1840         type_t   *type     = expression->base.type;
1841         ir_mode  *mode     = get_ir_mode(type);
1842         ir_node  *mem      = get_store();
1843         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1844         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1845         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1846
1847         load_res           = create_conv(dbgi, load_res, mode_int);
1848
1849         set_store(load_mem);
1850
1851         /* kill upper bits */
1852         ir_entity *entity       = expression->compound_entry->v.entity;
1853         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1854         ir_type   *entity_type  = get_entity_type(entity);
1855         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1856         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1857         assert(shift_bitsl >= 0);
1858         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1859         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1860         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1861
1862         long       shift_bitsr  = bitoffset + shift_bitsl;
1863         assert(shift_bitsr <= (long) machine_size);
1864         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1865         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1866         ir_node   *shiftr;
1867         if (mode_is_signed(mode)) {
1868                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1869         } else {
1870                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1871         }
1872
1873         return create_conv(dbgi, shiftr, mode);
1874 }
1875
1876 static void set_value_for_expression_addr(const expression_t *expression,
1877                                           ir_node *value, ir_node *addr)
1878 {
1879         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1880         value          = do_strict_conv(dbgi, value);
1881
1882         if (expression->kind == EXPR_REFERENCE) {
1883                 const reference_expression_t *ref = &expression->reference;
1884
1885                 declaration_t *declaration = ref->declaration;
1886                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1887                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1888                         set_value(declaration->v.value_number, value);
1889                         return;
1890                 }
1891         }
1892
1893         if (addr == NULL)
1894                 addr = expression_to_addr(expression);
1895
1896         type_t *type = skip_typeref(expression->base.type);
1897
1898         if (expression->kind == EXPR_SELECT) {
1899                 const select_expression_t *select = &expression->select;
1900
1901                 declaration_t *declaration = select->compound_entry;
1902                 if (declaration->type->kind == TYPE_BITFIELD) {
1903                         bitfield_store_to_firm(select, addr, value);
1904                         return;
1905                 }
1906         }
1907
1908         assign_value(dbgi, addr, type, value);
1909 }
1910
1911 static void set_value_for_expression(const expression_t *expression,
1912                                      ir_node *value)
1913 {
1914         set_value_for_expression_addr(expression, value, NULL);
1915 }
1916
1917 static ir_node *get_value_from_lvalue(const expression_t *expression,
1918                                       ir_node *addr)
1919 {
1920         if (expression->kind == EXPR_REFERENCE) {
1921                 const reference_expression_t *ref = &expression->reference;
1922
1923                 declaration_t *declaration = ref->declaration;
1924                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1925                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1926                         assert(addr == NULL);
1927                         ir_mode *mode = get_ir_mode(expression->base.type);
1928                         return get_value(declaration->v.value_number, mode);
1929                 }
1930         }
1931
1932         assert(addr != NULL);
1933         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1934
1935         ir_node *value;
1936         if (expression->kind == EXPR_SELECT &&
1937             expression->select.compound_entry->type->kind == TYPE_BITFIELD){
1938                 value = bitfield_extract_to_firm(&expression->select, addr);
1939         } else {
1940                 value = deref_address(dbgi, expression->base.type, addr);
1941         }
1942
1943         return value;
1944 }
1945
1946
1947 static ir_node *create_incdec(const unary_expression_t *expression)
1948 {
1949         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1950         const expression_t *value_expr = expression->value;
1951         ir_node            *addr       = expression_to_addr(value_expr);
1952         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1953
1954         type_t  *type = skip_typeref(expression->base.type);
1955         ir_mode *mode = get_ir_mode(expression->base.type);
1956
1957         ir_node *offset;
1958         if (is_type_pointer(type)) {
1959                 pointer_type_t *pointer_type = &type->pointer;
1960                 offset                       = get_type_size(pointer_type->points_to);
1961         } else {
1962                 assert(is_type_arithmetic(type));
1963                 offset = new_Const(mode, get_mode_one(mode));
1964         }
1965
1966         ir_node *result;
1967         ir_node *store_value;
1968         switch(expression->base.kind) {
1969         case EXPR_UNARY_POSTFIX_INCREMENT:
1970                 result      = value;
1971                 store_value = new_d_Add(dbgi, value, offset, mode);
1972                 break;
1973         case EXPR_UNARY_POSTFIX_DECREMENT:
1974                 result      = value;
1975                 store_value = new_d_Sub(dbgi, value, offset, mode);
1976                 break;
1977         case EXPR_UNARY_PREFIX_INCREMENT:
1978                 result      = new_d_Add(dbgi, value, offset, mode);
1979                 store_value = result;
1980                 break;
1981         case EXPR_UNARY_PREFIX_DECREMENT:
1982                 result      = new_d_Sub(dbgi, value, offset, mode);
1983                 store_value = result;
1984                 break;
1985         default:
1986                 panic("no incdec expr in create_incdec");
1987         }
1988
1989         set_value_for_expression_addr(value_expr, store_value, addr);
1990
1991         return result;
1992 }
1993
1994 static bool is_local_variable(expression_t *expression)
1995 {
1996         if (expression->kind != EXPR_REFERENCE)
1997                 return false;
1998         reference_expression_t *ref_expr    = &expression->reference;
1999         declaration_t          *declaration = ref_expr->declaration;
2000         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
2001 }
2002
2003 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2004 {
2005         switch(kind) {
2006         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2007         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2008         case EXPR_BINARY_NOTEQUAL:
2009                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2010         case EXPR_BINARY_ISLESS:
2011         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2012         case EXPR_BINARY_ISLESSEQUAL:
2013         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2014         case EXPR_BINARY_ISGREATER:
2015         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2016         case EXPR_BINARY_ISGREATEREQUAL:
2017         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2018         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2019
2020         default:
2021                 break;
2022         }
2023         panic("trying to get pn_Cmp from non-comparison binexpr type");
2024 }
2025
2026 /**
2027  * Handle the assume optimizer hint: check if a Confirm
2028  * node can be created.
2029  *
2030  * @param dbi    debug info
2031  * @param expr   the IL assume expression
2032  *
2033  * we support here only some simple cases:
2034  *  - var rel const
2035  *  - const rel val
2036  *  - var rel var
2037  */
2038 static ir_node *handle_assume_compare(dbg_info *dbi,
2039                                       const binary_expression_t *expression)
2040 {
2041         expression_t  *op1 = expression->left;
2042         expression_t  *op2 = expression->right;
2043         declaration_t *var2, *var = NULL;
2044         ir_node       *res = NULL;
2045         pn_Cmp         cmp_val;
2046
2047         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2048
2049         if (is_local_variable(op1) && is_local_variable(op2)) {
2050         var  = op1->reference.declaration;
2051             var2 = op2->reference.declaration;
2052
2053                 type_t  *const type = skip_typeref(var->type);
2054                 ir_mode *const mode = get_ir_mode(type);
2055
2056                 ir_node *const irn1 = get_value(var->v.value_number, mode);
2057                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
2058
2059                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2060                 set_value(var2->v.value_number, res);
2061
2062                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2063                 set_value(var->v.value_number, res);
2064
2065                 return res;
2066         }
2067
2068         expression_t *con;
2069         if (is_local_variable(op1) && is_constant_expression(op2)) {
2070                 var = op1->reference.declaration;
2071                 con = op2;
2072         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2073                 cmp_val = get_inversed_pnc(cmp_val);
2074                 var = op2->reference.declaration;
2075                 con = op1;
2076         }
2077
2078         if (var != NULL) {
2079                 type_t  *const type = skip_typeref(var->type);
2080                 ir_mode *const mode = get_ir_mode(type);
2081
2082                 res = get_value(var->v.value_number, mode);
2083                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2084                 set_value(var->v.value_number, res);
2085         }
2086         return res;
2087 }
2088
2089 /**
2090  * Handle the assume optimizer hint.
2091  *
2092  * @param dbi    debug info
2093  * @param expr   the IL assume expression
2094  */
2095 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2096         switch(expression->kind) {
2097         case EXPR_BINARY_EQUAL:
2098         case EXPR_BINARY_NOTEQUAL:
2099         case EXPR_BINARY_LESS:
2100         case EXPR_BINARY_LESSEQUAL:
2101         case EXPR_BINARY_GREATER:
2102         case EXPR_BINARY_GREATEREQUAL:
2103                 return handle_assume_compare(dbi, &expression->binary);
2104         default:
2105                 return NULL;
2106         }
2107 }
2108
2109 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2110 {
2111         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2112         type_t   *type = skip_typeref(expression->base.type);
2113
2114         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2115                 return expression_to_addr(expression->value);
2116
2117         const expression_t *value = expression->value;
2118
2119         switch(expression->base.kind) {
2120         case EXPR_UNARY_NEGATE: {
2121                 ir_node *value_node = expression_to_firm(value);
2122                 ir_mode *mode = get_ir_mode(type);
2123                 return new_d_Minus(dbgi, value_node, mode);
2124         }
2125         case EXPR_UNARY_PLUS:
2126                 return expression_to_firm(value);
2127         case EXPR_UNARY_BITWISE_NEGATE: {
2128                 ir_node *value_node = expression_to_firm(value);
2129                 ir_mode *mode = get_ir_mode(type);
2130                 return new_d_Not(dbgi, value_node, mode);
2131         }
2132         case EXPR_UNARY_NOT: {
2133                 ir_node *value_node = _expression_to_firm(value);
2134                 value_node          = create_conv(dbgi, value_node, mode_b);
2135                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2136                 return res;
2137         }
2138         case EXPR_UNARY_DEREFERENCE: {
2139                 ir_node *value_node = expression_to_firm(value);
2140                 type_t  *value_type = skip_typeref(value->base.type);
2141                 assert(is_type_pointer(value_type));
2142                 type_t  *points_to  = value_type->pointer.points_to;
2143                 return deref_address(dbgi, points_to, value_node);
2144         }
2145         case EXPR_UNARY_POSTFIX_INCREMENT:
2146         case EXPR_UNARY_POSTFIX_DECREMENT:
2147         case EXPR_UNARY_PREFIX_INCREMENT:
2148         case EXPR_UNARY_PREFIX_DECREMENT:
2149                 return create_incdec(expression);
2150         case EXPR_UNARY_CAST: {
2151                 ir_node *value_node = expression_to_firm(value);
2152                 if (is_type_scalar(type)) {
2153                         ir_mode *mode = get_ir_mode(type);
2154                         ir_node *node = create_conv(dbgi, value_node, mode);
2155                         node = do_strict_conv(dbgi, node);
2156                         return node;
2157                 } else {
2158                         /* make sure firm type is constructed */
2159                         (void) get_ir_type(type);
2160                         return value_node;
2161                 }
2162         }
2163         case EXPR_UNARY_CAST_IMPLICIT: {
2164                 ir_node *value_node = expression_to_firm(value);
2165                 if (is_type_scalar(type)) {
2166                         ir_mode *mode = get_ir_mode(type);
2167                         return create_conv(dbgi, value_node, mode);
2168                 } else {
2169                         return value_node;
2170                 }
2171         }
2172         case EXPR_UNARY_ASSUME:
2173                 if (firm_opt.confirm)
2174                         return handle_assume(dbgi, value);
2175                 else
2176                         return NULL;
2177
2178         default:
2179                 break;
2180         }
2181         panic("invalid UNEXPR type found");
2182 }
2183
2184 /**
2185  * produces a 0/1 depending of the value of a mode_b node
2186  */
2187 static ir_node *produce_condition_result(const expression_t *expression,
2188                                          dbg_info *dbgi)
2189 {
2190         ir_mode *mode      = get_ir_mode(expression->base.type);
2191         ir_node *cur_block = get_cur_block();
2192
2193         ir_node *one_block = new_immBlock();
2194         ir_node *one       = new_Const(mode, get_mode_one(mode));
2195         ir_node *jmp_one   = new_d_Jmp(dbgi);
2196
2197         ir_node *zero_block = new_immBlock();
2198         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2199         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2200
2201         set_cur_block(cur_block);
2202         create_condition_evaluation(expression, one_block, zero_block);
2203         mature_immBlock(one_block);
2204         mature_immBlock(zero_block);
2205
2206         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2207         new_Block(2, in_cf);
2208
2209         ir_node *in[2] = { one, zero };
2210         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2211
2212         return val;
2213 }
2214
2215 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2216                 ir_node *value, type_t *type)
2217 {
2218         pointer_type_t *const pointer_type = &type->pointer;
2219         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2220         unsigned              elem_size    = get_type_size_const(points_to);
2221
2222         /* gcc extension: allow arithmetic with void * and function * */
2223         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2224             is_type_function(points_to))  {
2225                 elem_size = 1;
2226         }
2227
2228         assert(elem_size >= 1);
2229         if (elem_size == 1)
2230                 return value;
2231
2232         value = create_conv(dbgi, value, mode_int);
2233         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2234         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2235         return mul;
2236 }
2237
2238 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2239                           ir_node *left, ir_node *right)
2240 {
2241         ir_mode  *mode;
2242         type_t   *type_left  = skip_typeref(expression->left->base.type);
2243         type_t   *type_right = skip_typeref(expression->right->base.type);
2244
2245         expression_kind_t kind = expression->base.kind;
2246
2247         switch (kind) {
2248         case EXPR_BINARY_SHIFTLEFT:
2249         case EXPR_BINARY_SHIFTRIGHT:
2250         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2251         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2252                 mode  = get_irn_mode(left);
2253                 right = create_conv(dbgi, right, mode_uint);
2254                 break;
2255
2256         case EXPR_BINARY_SUB:
2257                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2258                         const pointer_type_t *const ptr_type = &type_left->pointer;
2259
2260                         mode = get_ir_mode(expression->base.type);
2261                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2262                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2263                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2264                         ir_node *const no_mem    = new_NoMem();
2265                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2266                                                                                                    mode, op_pin_state_floats);
2267                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2268                 }
2269                 /* fallthrough */
2270         case EXPR_BINARY_SUB_ASSIGN:
2271                 if (is_type_pointer(type_left)) {
2272                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2273                         mode  = get_ir_mode(type_left);
2274                         break;
2275                 }
2276                 goto normal_node;
2277
2278         case EXPR_BINARY_ADD:
2279         case EXPR_BINARY_ADD_ASSIGN:
2280                 if (is_type_pointer(type_left)) {
2281                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2282                         mode  = get_ir_mode(type_left);
2283                         break;
2284                 } else if (is_type_pointer(type_right)) {
2285                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2286                         mode  = get_ir_mode(type_right);
2287                         break;
2288                 }
2289                 goto normal_node;
2290
2291         default:
2292 normal_node:
2293                 mode = get_irn_mode(right);
2294                 left = create_conv(dbgi, left, mode);
2295                 break;
2296         }
2297
2298         switch (kind) {
2299         case EXPR_BINARY_ADD_ASSIGN:
2300         case EXPR_BINARY_ADD:
2301                 return new_d_Add(dbgi, left, right, mode);
2302         case EXPR_BINARY_SUB_ASSIGN:
2303         case EXPR_BINARY_SUB:
2304                 return new_d_Sub(dbgi, left, right, mode);
2305         case EXPR_BINARY_MUL_ASSIGN:
2306         case EXPR_BINARY_MUL:
2307                 return new_d_Mul(dbgi, left, right, mode);
2308         case EXPR_BINARY_BITWISE_AND:
2309         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2310                 return new_d_And(dbgi, left, right, mode);
2311         case EXPR_BINARY_BITWISE_OR:
2312         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2313                 return new_d_Or(dbgi, left, right, mode);
2314         case EXPR_BINARY_BITWISE_XOR:
2315         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2316                 return new_d_Eor(dbgi, left, right, mode);
2317         case EXPR_BINARY_SHIFTLEFT:
2318         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2319                 return new_d_Shl(dbgi, left, right, mode);
2320         case EXPR_BINARY_SHIFTRIGHT:
2321         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2322                 if (mode_is_signed(mode)) {
2323                         return new_d_Shrs(dbgi, left, right, mode);
2324                 } else {
2325                         return new_d_Shr(dbgi, left, right, mode);
2326                 }
2327         case EXPR_BINARY_DIV:
2328         case EXPR_BINARY_DIV_ASSIGN: {
2329                 ir_node *pin = new_Pin(new_NoMem());
2330                 ir_node *op;
2331                 ir_node *res;
2332                 if (mode_is_float(mode)) {
2333                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2334                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2335                 } else {
2336                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2337                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2338                 }
2339                 return res;
2340         }
2341         case EXPR_BINARY_MOD:
2342         case EXPR_BINARY_MOD_ASSIGN: {
2343                 ir_node *pin = new_Pin(new_NoMem());
2344                 assert(!mode_is_float(mode));
2345                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2346                                          op_pin_state_floats);
2347                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2348                 return res;
2349         }
2350         default:
2351                 panic("unexpected expression kind");
2352         }
2353 }
2354
2355 static ir_node *create_lazy_op(const binary_expression_t *expression)
2356 {
2357         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2358         type_t   *type = expression->base.type;
2359         ir_mode  *mode = get_ir_mode(type);
2360
2361         if (is_constant_expression(expression->left)) {
2362                 long val = fold_constant(expression->left);
2363                 expression_kind_t ekind = expression->base.kind;
2364                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2365                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2366                     (ekind == EXPR_BINARY_LOGICAL_OR  && val == 0)) {
2367                         return expression_to_firm(expression->right);
2368                 } else {
2369                         return new_Const(mode, get_mode_one(mode));
2370                 }
2371         }
2372
2373         return produce_condition_result((const expression_t*) expression, dbgi);
2374 }
2375
2376 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2377                                             ir_node *right, ir_mode *mode);
2378
2379 static ir_node *create_assign_binop(const binary_expression_t *expression)
2380 {
2381         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2382         const expression_t *left_expr = expression->left;
2383         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2384         ir_node            *right     = expression_to_firm(expression->right);
2385         ir_node            *left_addr = expression_to_addr(left_expr);
2386         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2387         ir_node            *result    = create_op(dbgi, expression, left, right);
2388
2389         result = create_conv(dbgi, result, left_mode);
2390         result = do_strict_conv(dbgi, result);
2391
2392         set_value_for_expression_addr(left_expr, result, left_addr);
2393
2394         return result;
2395 }
2396
2397 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2398 {
2399         expression_kind_t kind = expression->base.kind;
2400
2401         switch(kind) {
2402         case EXPR_BINARY_EQUAL:
2403         case EXPR_BINARY_NOTEQUAL:
2404         case EXPR_BINARY_LESS:
2405         case EXPR_BINARY_LESSEQUAL:
2406         case EXPR_BINARY_GREATER:
2407         case EXPR_BINARY_GREATEREQUAL:
2408         case EXPR_BINARY_ISGREATER:
2409         case EXPR_BINARY_ISGREATEREQUAL:
2410         case EXPR_BINARY_ISLESS:
2411         case EXPR_BINARY_ISLESSEQUAL:
2412         case EXPR_BINARY_ISLESSGREATER:
2413         case EXPR_BINARY_ISUNORDERED: {
2414                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2415                 ir_node *left  = expression_to_firm(expression->left);
2416                 ir_node *right = expression_to_firm(expression->right);
2417                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2418                 long     pnc   = get_pnc(kind, expression->left->base.type);
2419                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2420                 return proj;
2421         }
2422         case EXPR_BINARY_ASSIGN: {
2423                 ir_node *addr  = expression_to_addr(expression->left);
2424                 ir_node *right = expression_to_firm(expression->right);
2425                 set_value_for_expression_addr(expression->left, right, addr);
2426
2427                 return right;
2428         }
2429         case EXPR_BINARY_ADD:
2430         case EXPR_BINARY_SUB:
2431         case EXPR_BINARY_MUL:
2432         case EXPR_BINARY_DIV:
2433         case EXPR_BINARY_MOD:
2434         case EXPR_BINARY_BITWISE_AND:
2435         case EXPR_BINARY_BITWISE_OR:
2436         case EXPR_BINARY_BITWISE_XOR:
2437         case EXPR_BINARY_SHIFTLEFT:
2438         case EXPR_BINARY_SHIFTRIGHT:
2439         {
2440                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2441                 ir_node  *left  = expression_to_firm(expression->left);
2442                 ir_node  *right = expression_to_firm(expression->right);
2443                 return create_op(dbgi, expression, left, right);
2444         }
2445         case EXPR_BINARY_LOGICAL_AND:
2446         case EXPR_BINARY_LOGICAL_OR:
2447                 return create_lazy_op(expression);
2448         case EXPR_BINARY_COMMA:
2449                 /* create side effects of left side */
2450                 (void) expression_to_firm(expression->left);
2451                 return _expression_to_firm(expression->right);
2452
2453         case EXPR_BINARY_ADD_ASSIGN:
2454         case EXPR_BINARY_SUB_ASSIGN:
2455         case EXPR_BINARY_MUL_ASSIGN:
2456         case EXPR_BINARY_MOD_ASSIGN:
2457         case EXPR_BINARY_DIV_ASSIGN:
2458         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2459         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2460         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2461         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2462         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2463                 return create_assign_binop(expression);
2464         case EXPR_BINARY_BUILTIN_EXPECT:
2465                 return _expression_to_firm(expression->left);
2466         default:
2467                 panic("TODO binexpr type");
2468         }
2469 }
2470
2471 static ir_node *array_access_addr(const array_access_expression_t *expression)
2472 {
2473         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2474         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2475         ir_node  *offset    = expression_to_firm(expression->index);
2476
2477         type_t  *offset_type = skip_typeref(expression->index->base.type);
2478         ir_mode *mode;
2479         if (is_type_signed(offset_type)) {
2480                 mode = get_ir_mode(type_ssize_t);
2481         } else {
2482                 mode = get_ir_mode(type_size_t);
2483         }
2484         offset = create_conv(dbgi, offset, mode);
2485
2486         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2487         assert(is_type_pointer(ref_type));
2488         pointer_type_t *pointer_type = &ref_type->pointer;
2489
2490         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2491         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2492         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2493                                              mode);
2494         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2495
2496         return result;
2497 }
2498
2499 static ir_node *array_access_to_firm(
2500                 const array_access_expression_t *expression)
2501 {
2502         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2503         ir_node  *addr   = array_access_addr(expression);
2504         type_t   *type   = revert_automatic_type_conversion(
2505                         (const expression_t*) expression);
2506         type             = skip_typeref(type);
2507
2508         return deref_address(dbgi, type, addr);
2509 }
2510
2511 static long get_offsetof_offset(const offsetof_expression_t *expression)
2512 {
2513         type_t *orig_type = expression->type;
2514         long    offset    = 0;
2515
2516         designator_t *designator = expression->designator;
2517         for( ; designator != NULL; designator = designator->next) {
2518                 type_t *type = skip_typeref(orig_type);
2519                 /* be sure the type is constructed */
2520                 (void) get_ir_type(type);
2521
2522                 if (designator->symbol != NULL) {
2523                         assert(is_type_compound(type));
2524                         symbol_t *symbol = designator->symbol;
2525
2526                         declaration_t *declaration = type->compound.declaration;
2527                         declaration_t *iter        = declaration->scope.declarations;
2528                         for( ; iter != NULL; iter = iter->next) {
2529                                 if (iter->symbol == symbol) {
2530                                         break;
2531                                 }
2532                         }
2533                         assert(iter != NULL);
2534
2535                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2536                         offset += get_entity_offset(iter->v.entity);
2537
2538                         orig_type = iter->type;
2539                 } else {
2540                         expression_t *array_index = designator->array_index;
2541                         assert(designator->array_index != NULL);
2542                         assert(is_type_array(type));
2543                         assert(is_type_valid(array_index->base.type));
2544
2545                         long index         = fold_constant(array_index);
2546                         ir_type *arr_type  = get_ir_type(type);
2547                         ir_type *elem_type = get_array_element_type(arr_type);
2548                         long     elem_size = get_type_size_bytes(elem_type);
2549
2550                         offset += index * elem_size;
2551
2552                         orig_type = type->array.element_type;
2553                 }
2554         }
2555
2556         return offset;
2557 }
2558
2559 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2560 {
2561         ir_mode  *mode   = get_ir_mode(expression->base.type);
2562         long      offset = get_offsetof_offset(expression);
2563         tarval   *tv     = new_tarval_from_long(offset, mode);
2564         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2565
2566         return new_d_Const(dbgi, mode, tv);
2567 }
2568
2569 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2570                                      ir_entity *entity, type_t *type);
2571
2572 static ir_node *compound_literal_to_firm(
2573                 const compound_literal_expression_t *expression)
2574 {
2575         type_t *type = expression->type;
2576
2577         /* create an entity on the stack */
2578         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2579
2580         ident     *const id     = id_unique("CompLit.%u");
2581         ir_type   *const irtype = get_ir_type(type);
2582         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2583         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2584         set_entity_ld_ident(entity, id);
2585
2586         set_entity_variability(entity, variability_uninitialized);
2587
2588         /* create initialisation code */
2589         initializer_t *initializer = expression->initializer;
2590         create_local_initializer(initializer, dbgi, entity, type);
2591
2592         /* create a sel for the compound literal address */
2593         ir_node *frame = get_local_frame(entity);
2594         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2595         return sel;
2596 }
2597
2598 /**
2599  * Transform a sizeof expression into Firm code.
2600  */
2601 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2602 {
2603         type_t *type = expression->type;
2604         if (type == NULL) {
2605                 type = expression->tp_expression->base.type;
2606                 assert(type != NULL);
2607         }
2608
2609         type = skip_typeref(type);
2610         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2611         if (is_type_array(type) && type->array.is_vla
2612                         && expression->tp_expression != NULL) {
2613                 expression_to_firm(expression->tp_expression);
2614         }
2615
2616         return get_type_size(type);
2617 }
2618
2619 /**
2620  * Transform an alignof expression into Firm code.
2621  */
2622 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2623 {
2624         type_t *type = expression->type;
2625         if (type == NULL) {
2626                 /* beware: if expression is a variable reference, return the
2627                    alignment of the variable. */
2628                 const expression_t *tp_expression = expression->tp_expression;
2629                 const declaration_t *declaration = expr_is_variable(tp_expression);
2630                 if (declaration != NULL) {
2631                         /* TODO: get the alignment of this variable. */
2632                 }
2633                 type = tp_expression->base.type;
2634                 assert(type != NULL);
2635         }
2636
2637         ir_mode *const mode = get_ir_mode(expression->base.type);
2638         symconst_symbol sym;
2639         sym.type_p = get_ir_type(type);
2640         return new_SymConst(mode, sym, symconst_type_align);
2641 }
2642
2643 static void init_ir_types(void);
2644
2645 long fold_constant(const expression_t *expression)
2646 {
2647         bool constant_folding_old = constant_folding;
2648         constant_folding = true;
2649
2650         init_ir_types();
2651
2652         assert(is_constant_expression(expression));
2653
2654         ir_graph *old_current_ir_graph = current_ir_graph;
2655         if (current_ir_graph == NULL) {
2656                 current_ir_graph = get_const_code_irg();
2657         }
2658
2659         ir_node *cnst = expression_to_firm(expression);
2660         current_ir_graph = old_current_ir_graph;
2661
2662         if (!is_Const(cnst)) {
2663                 panic("couldn't fold constant\n");
2664         }
2665
2666         tarval *tv = get_Const_tarval(cnst);
2667         if (!tarval_is_long(tv)) {
2668                 panic("result of constant folding is not integer\n");
2669         }
2670
2671         constant_folding = constant_folding_old;
2672
2673         return get_tarval_long(tv);
2674 }
2675
2676 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2677 {
2678         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2679
2680         /* first try to fold a constant condition */
2681         if (is_constant_expression(expression->condition)) {
2682                 long val = fold_constant(expression->condition);
2683                 if (val) {
2684                         expression_t *true_expression = expression->true_expression;
2685                         if (true_expression == NULL)
2686                                 true_expression = expression->condition;
2687                         return expression_to_firm(true_expression);
2688                 } else {
2689                         return expression_to_firm(expression->false_expression);
2690                 }
2691         }
2692
2693         ir_node *cur_block   = get_cur_block();
2694
2695         /* create the true block */
2696         ir_node *true_block  = new_immBlock();
2697
2698         ir_node *true_val = expression->true_expression != NULL ?
2699                 expression_to_firm(expression->true_expression) : NULL;
2700         ir_node *true_jmp = new_Jmp();
2701
2702         /* create the false block */
2703         ir_node *false_block = new_immBlock();
2704
2705         ir_node *false_val = expression_to_firm(expression->false_expression);
2706         ir_node *false_jmp = new_Jmp();
2707
2708         /* create the condition evaluation */
2709         set_cur_block(cur_block);
2710         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2711         if (expression->true_expression == NULL) {
2712                 if (cond_expr != NULL) {
2713                         true_val = cond_expr;
2714                 } else {
2715                         /* Condition ended with a short circuit (&&, ||, !) operation.
2716                          * Generate a "1" as value for the true branch. */
2717                         ir_mode *const mode = mode_Is;
2718                         true_val = new_Const(mode, get_mode_one(mode));
2719                 }
2720         }
2721         mature_immBlock(true_block);
2722         mature_immBlock(false_block);
2723
2724         /* create the common block */
2725         ir_node *in_cf[2] = { true_jmp, false_jmp };
2726         new_Block(2, in_cf);
2727
2728         /* TODO improve static semantics, so either both or no values are NULL */
2729         if (true_val == NULL || false_val == NULL)
2730                 return NULL;
2731
2732         ir_node *in[2] = { true_val, false_val };
2733         ir_mode *mode  = get_irn_mode(true_val);
2734         assert(get_irn_mode(false_val) == mode);
2735         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2736
2737         return val;
2738 }
2739
2740 /**
2741  * Returns an IR-node representing the address of a field.
2742  */
2743 static ir_node *select_addr(const select_expression_t *expression)
2744 {
2745         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2746
2747         ir_node *compound_addr = expression_to_firm(expression->compound);
2748
2749         /* make sure the type is constructed */
2750         type_t *type = skip_typeref(expression->compound->base.type);
2751         if (is_type_pointer(type)) {
2752                 type = type->pointer.points_to;
2753         }
2754         (void) get_ir_type(type);
2755
2756         declaration_t *entry = expression->compound_entry;
2757         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2758         ir_entity     *entity = entry->v.entity;
2759
2760         assert(entity != NULL);
2761
2762         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2763
2764         return sel;
2765 }
2766
2767 static ir_node *select_to_firm(const select_expression_t *expression)
2768 {
2769         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2770         ir_node  *addr = select_addr(expression);
2771         type_t   *type = revert_automatic_type_conversion(
2772                         (const expression_t*) expression);
2773         type           = skip_typeref(type);
2774
2775         declaration_t *entry      = expression->compound_entry;
2776         type_t        *entry_type = skip_typeref(entry->type);
2777
2778         if (entry_type->kind == TYPE_BITFIELD) {
2779                 return bitfield_extract_to_firm(expression, addr);
2780         }
2781
2782         return deref_address(dbgi, type, addr);
2783 }
2784
2785 /* Values returned by __builtin_classify_type. */
2786 typedef enum gcc_type_class
2787 {
2788         no_type_class = -1,
2789         void_type_class,
2790         integer_type_class,
2791         char_type_class,
2792         enumeral_type_class,
2793         boolean_type_class,
2794         pointer_type_class,
2795         reference_type_class,
2796         offset_type_class,
2797         real_type_class,
2798         complex_type_class,
2799         function_type_class,
2800         method_type_class,
2801         record_type_class,
2802         union_type_class,
2803         array_type_class,
2804         string_type_class,
2805         set_type_class,
2806         file_type_class,
2807         lang_type_class
2808 } gcc_type_class;
2809
2810 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2811 {
2812         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2813
2814         gcc_type_class tc;
2815         switch (type->kind)
2816         {
2817                 case TYPE_ATOMIC: {
2818                         const atomic_type_t *const atomic_type = &type->atomic;
2819                         switch (atomic_type->akind) {
2820                                 /* should not be reached */
2821                                 case ATOMIC_TYPE_INVALID:
2822                                         tc = no_type_class;
2823                                         goto make_const;
2824
2825                                 /* gcc cannot do that */
2826                                 case ATOMIC_TYPE_VOID:
2827                                         tc = void_type_class;
2828                                         goto make_const;
2829
2830                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2831                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2832                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2833                                 case ATOMIC_TYPE_SHORT:
2834                                 case ATOMIC_TYPE_USHORT:
2835                                 case ATOMIC_TYPE_INT:
2836                                 case ATOMIC_TYPE_UINT:
2837                                 case ATOMIC_TYPE_LONG:
2838                                 case ATOMIC_TYPE_ULONG:
2839                                 case ATOMIC_TYPE_LONGLONG:
2840                                 case ATOMIC_TYPE_ULONGLONG:
2841                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2842                                         tc = integer_type_class;
2843                                         goto make_const;
2844
2845                                 case ATOMIC_TYPE_FLOAT:
2846                                 case ATOMIC_TYPE_DOUBLE:
2847                                 case ATOMIC_TYPE_LONG_DOUBLE:
2848                                         tc = real_type_class;
2849                                         goto make_const;
2850                         }
2851                         panic("Unexpected atomic type in classify_type_to_firm().");
2852                 }
2853
2854                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2855                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2856                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2857                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2858                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2859                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2860                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2861                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2862
2863                 /* gcc handles this as integer */
2864                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2865
2866                 case TYPE_BUILTIN:
2867                 /* typedef/typeof should be skipped already */
2868                 case TYPE_TYPEDEF:
2869                 case TYPE_TYPEOF:
2870                 case TYPE_INVALID:
2871                 case TYPE_ERROR:
2872                         break;
2873         }
2874         panic("unexpected TYPE classify_type_to_firm().");
2875
2876 make_const: ;
2877         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2878         ir_mode  *const mode = mode_int;
2879         tarval   *const tv   = new_tarval_from_long(tc, mode);
2880         return new_d_Const(dbgi, mode, tv);
2881 }
2882
2883 static ir_node *function_name_to_firm(
2884                 const funcname_expression_t *const expr)
2885 {
2886         switch(expr->kind) {
2887         case FUNCNAME_FUNCTION:
2888         case FUNCNAME_PRETTY_FUNCTION:
2889         case FUNCNAME_FUNCDNAME:
2890                 if (current_function_name == NULL) {
2891                         const source_position_t *const src_pos = &expr->base.source_position;
2892                         const char *const name = current_function_decl->symbol->string;
2893                         const string_t string = { name, strlen(name) + 1 };
2894                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2895                 }
2896                 return current_function_name;
2897         case FUNCNAME_FUNCSIG:
2898                 if (current_funcsig == NULL) {
2899                         const source_position_t *const src_pos = &expr->base.source_position;
2900                         ir_entity *ent = get_irg_entity(current_ir_graph);
2901                         const char *const name = get_entity_ld_name(ent);
2902                         const string_t string = { name, strlen(name) + 1 };
2903                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2904                 }
2905                 return current_funcsig;
2906         }
2907         panic("Unsupported function name");
2908 }
2909
2910 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2911 {
2912         statement_t *statement = expr->statement;
2913
2914         assert(statement->kind == STATEMENT_COMPOUND);
2915         return compound_statement_to_firm(&statement->compound);
2916 }
2917
2918 static ir_node *va_start_expression_to_firm(
2919         const va_start_expression_t *const expr)
2920 {
2921         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2922         int        const n           = get_method_n_params(method_type) - 1;
2923         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2924         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2925         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2926         ir_node   *const no_mem      = new_NoMem();
2927         ir_node   *const arg_sel     =
2928                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2929
2930         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2931         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2932         set_value_for_expression(expr->ap, add);
2933
2934         return NULL;
2935 }
2936
2937 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2938 {
2939         type_t       *const type    = expr->base.type;
2940         expression_t *const ap_expr = expr->ap;
2941         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2942         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2943         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2944         ir_node      *const res     = deref_address(dbgi, type, ap);
2945
2946         ir_node      *const cnst    = get_type_size(expr->base.type);
2947         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2948
2949         set_value_for_expression_addr(ap_expr, add, ap_addr);
2950
2951         return res;
2952 }
2953
2954 static ir_node *dereference_addr(const unary_expression_t *const expression)
2955 {
2956         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2957         return expression_to_firm(expression->value);
2958 }
2959
2960 /**
2961  * Returns a IR-node representing an lvalue of the given expression.
2962  */
2963 static ir_node *expression_to_addr(const expression_t *expression)
2964 {
2965         switch(expression->kind) {
2966         case EXPR_REFERENCE:
2967                 return reference_addr(&expression->reference);
2968         case EXPR_ARRAY_ACCESS:
2969                 return array_access_addr(&expression->array_access);
2970         case EXPR_SELECT:
2971                 return select_addr(&expression->select);
2972         case EXPR_CALL:
2973                 return call_expression_to_firm(&expression->call);
2974         case EXPR_UNARY_DEREFERENCE: {
2975                 return dereference_addr(&expression->unary);
2976         }
2977         default:
2978                 break;
2979         }
2980         panic("trying to get address of non-lvalue");
2981 }
2982
2983 static ir_node *builtin_constant_to_firm(
2984                 const builtin_constant_expression_t *expression)
2985 {
2986         ir_mode *mode = get_ir_mode(expression->base.type);
2987         long     v;
2988
2989         if (is_constant_expression(expression->value)) {
2990                 v = 1;
2991         } else {
2992                 v = 0;
2993         }
2994         return new_Const_long(mode, v);
2995 }
2996
2997 static ir_node *builtin_prefetch_to_firm(
2998                 const builtin_prefetch_expression_t *expression)
2999 {
3000         ir_node *adr = expression_to_firm(expression->adr);
3001         /* no Firm support for prefetch yet */
3002         (void) adr;
3003         return NULL;
3004 }
3005
3006 static ir_node *get_label_block(declaration_t *label)
3007 {
3008         assert(label->namespc == NAMESPACE_LABEL || label->namespc == NAMESPACE_LOCAL_LABEL);
3009
3010         if (label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
3011                 return label->v.block;
3012         }
3013         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
3014
3015         /* beware: might be called from create initializer with current_ir_graph
3016          * set to const_code_irg. */
3017         ir_graph *rem    = current_ir_graph;
3018         current_ir_graph = current_function;
3019
3020         ir_node *old_cur_block = get_cur_block();
3021         ir_node *block         = new_immBlock();
3022         set_cur_block(old_cur_block);
3023
3024         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
3025         label->v.block          = block;
3026
3027         ARR_APP1(declaration_t *, all_labels, label);
3028
3029         current_ir_graph = rem;
3030         return block;
3031 }
3032
3033 /**
3034  * Pointer to a label.  This is used for the
3035  * GNU address-of-label extension.
3036  */
3037 static ir_node *label_address_to_firm(
3038                 const label_address_expression_t *label)
3039 {
3040         ir_node    *block = get_label_block(label->declaration);
3041         ir_label_t  nr    = get_Block_label(block);
3042
3043         if (nr == 0) {
3044                 nr = get_irp_next_label_nr();
3045                 set_Block_label(block, nr);
3046         }
3047         symconst_symbol value;
3048         value.label = nr;
3049         return new_SymConst(mode_P_code, value, symconst_label);
3050 }
3051
3052 /**
3053  * creates firm nodes for an expression. The difference between this function
3054  * and expression_to_firm is, that this version might produce mode_b nodes
3055  * instead of mode_Is.
3056  */
3057 static ir_node *_expression_to_firm(const expression_t *expression)
3058 {
3059 #ifndef NDEBUG
3060         if (!constant_folding) {
3061                 assert(!expression->base.transformed);
3062                 ((expression_t*) expression)->base.transformed = true;
3063         }
3064 #endif
3065
3066         switch (expression->kind) {
3067         case EXPR_CHARACTER_CONSTANT:
3068                 return character_constant_to_firm(&expression->conste);
3069         case EXPR_WIDE_CHARACTER_CONSTANT:
3070                 return wide_character_constant_to_firm(&expression->conste);
3071         case EXPR_CONST:
3072                 return const_to_firm(&expression->conste);
3073         case EXPR_STRING_LITERAL:
3074                 return string_literal_to_firm(&expression->string);
3075         case EXPR_WIDE_STRING_LITERAL:
3076                 return wide_string_literal_to_firm(&expression->wide_string);
3077         case EXPR_REFERENCE:
3078                 return reference_expression_to_firm(&expression->reference);
3079         case EXPR_CALL:
3080                 return call_expression_to_firm(&expression->call);
3081         EXPR_UNARY_CASES
3082                 return unary_expression_to_firm(&expression->unary);
3083         EXPR_BINARY_CASES
3084                 return binary_expression_to_firm(&expression->binary);
3085         case EXPR_ARRAY_ACCESS:
3086                 return array_access_to_firm(&expression->array_access);
3087         case EXPR_SIZEOF:
3088                 return sizeof_to_firm(&expression->typeprop);
3089         case EXPR_ALIGNOF:
3090                 return alignof_to_firm(&expression->typeprop);
3091         case EXPR_CONDITIONAL:
3092                 return conditional_to_firm(&expression->conditional);
3093         case EXPR_SELECT:
3094                 return select_to_firm(&expression->select);
3095         case EXPR_CLASSIFY_TYPE:
3096                 return classify_type_to_firm(&expression->classify_type);
3097         case EXPR_FUNCNAME:
3098                 return function_name_to_firm(&expression->funcname);
3099         case EXPR_STATEMENT:
3100                 return statement_expression_to_firm(&expression->statement);
3101         case EXPR_VA_START:
3102                 return va_start_expression_to_firm(&expression->va_starte);
3103         case EXPR_VA_ARG:
3104                 return va_arg_expression_to_firm(&expression->va_arge);
3105         case EXPR_BUILTIN_SYMBOL:
3106                 panic("unimplemented expression found");
3107         case EXPR_BUILTIN_CONSTANT_P:
3108                 return builtin_constant_to_firm(&expression->builtin_constant);
3109         case EXPR_BUILTIN_PREFETCH:
3110                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3111         case EXPR_OFFSETOF:
3112                 return offsetof_to_firm(&expression->offsetofe);
3113         case EXPR_COMPOUND_LITERAL:
3114                 return compound_literal_to_firm(&expression->compound_literal);
3115         case EXPR_LABEL_ADDRESS:
3116                 return label_address_to_firm(&expression->label_address);
3117
3118         case EXPR_UNKNOWN:
3119         case EXPR_INVALID:
3120                 break;
3121         }
3122         panic("invalid expression found");
3123 }
3124
3125 static bool produces_mode_b(const expression_t *expression)
3126 {
3127         switch (expression->kind) {
3128         case EXPR_BINARY_EQUAL:
3129         case EXPR_BINARY_NOTEQUAL:
3130         case EXPR_BINARY_LESS:
3131         case EXPR_BINARY_LESSEQUAL:
3132         case EXPR_BINARY_GREATER:
3133         case EXPR_BINARY_GREATEREQUAL:
3134         case EXPR_BINARY_ISGREATER:
3135         case EXPR_BINARY_ISGREATEREQUAL:
3136         case EXPR_BINARY_ISLESS:
3137         case EXPR_BINARY_ISLESSEQUAL:
3138         case EXPR_BINARY_ISLESSGREATER:
3139         case EXPR_BINARY_ISUNORDERED:
3140         case EXPR_UNARY_NOT:
3141                 return true;
3142
3143         case EXPR_BINARY_BUILTIN_EXPECT:
3144                 return produces_mode_b(expression->binary.left);
3145         case EXPR_BINARY_COMMA:
3146                 return produces_mode_b(expression->binary.right);
3147
3148         default:
3149                 return false;
3150         }
3151 }
3152
3153 static ir_node *expression_to_firm(const expression_t *expression)
3154 {
3155         if (!produces_mode_b(expression)) {
3156                 ir_node *res = _expression_to_firm(expression);
3157                 assert(res == NULL || get_irn_mode(res) != mode_b);
3158                 return res;
3159         }
3160
3161         if (is_constant_expression(expression)) {
3162                 ir_node *res  = _expression_to_firm(expression);
3163                 ir_mode *mode = get_ir_mode(expression->base.type);
3164                 assert(is_Const(res));
3165                 if (is_Const_null(res)) {
3166                         return new_Const_long(mode, 0);
3167                 } else {
3168                         return new_Const_long(mode, 1);
3169                 }
3170         }
3171
3172         /* we have to produce a 0/1 from the mode_b expression */
3173         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3174         return produce_condition_result(expression, dbgi);
3175 }
3176
3177 /**
3178  * create a short-circuit expression evaluation that tries to construct
3179  * efficient control flow structures for &&, || and ! expressions
3180  */
3181 static ir_node *create_condition_evaluation(const expression_t *expression,
3182                                             ir_node *true_block,
3183                                             ir_node *false_block)
3184 {
3185         switch(expression->kind) {
3186         case EXPR_UNARY_NOT: {
3187                 const unary_expression_t *unary_expression = &expression->unary;
3188                 create_condition_evaluation(unary_expression->value, false_block,
3189                                             true_block);
3190                 return NULL;
3191         }
3192         case EXPR_BINARY_LOGICAL_AND: {
3193                 const binary_expression_t *binary_expression = &expression->binary;
3194
3195                 ir_node *cur_block   = get_cur_block();
3196                 ir_node *extra_block = new_immBlock();
3197                 set_cur_block(cur_block);
3198                 create_condition_evaluation(binary_expression->left, extra_block,
3199                                             false_block);
3200                 mature_immBlock(extra_block);
3201                 set_cur_block(extra_block);
3202                 create_condition_evaluation(binary_expression->right, true_block,
3203                                             false_block);
3204                 return NULL;
3205         }
3206         case EXPR_BINARY_LOGICAL_OR: {
3207                 const binary_expression_t *binary_expression = &expression->binary;
3208
3209                 ir_node *cur_block   = get_cur_block();
3210                 ir_node *extra_block = new_immBlock();
3211                 set_cur_block(cur_block);
3212                 create_condition_evaluation(binary_expression->left, true_block,
3213                                             extra_block);
3214                 mature_immBlock(extra_block);
3215                 set_cur_block(extra_block);
3216                 create_condition_evaluation(binary_expression->right, true_block,
3217                                             false_block);
3218                 return NULL;
3219         }
3220         default:
3221                 break;
3222         }
3223
3224         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3225         ir_node  *cond_expr  = _expression_to_firm(expression);
3226         ir_node  *condition  = create_conv(NULL, cond_expr, mode_b);
3227         ir_node  *cond       = new_d_Cond(dbgi, condition);
3228         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3229         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3230
3231         /* set branch prediction info based on __builtin_expect */
3232         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3233                 long               cnst = fold_constant(expression->binary.right);
3234                 cond_jmp_predicate pred;
3235
3236                 if (cnst == 0) {
3237                         pred = COND_JMP_PRED_FALSE;
3238                 } else {
3239                         pred = COND_JMP_PRED_TRUE;
3240                 }
3241                 set_Cond_jmp_pred(cond, pred);
3242         }
3243
3244         add_immBlock_pred(true_block, true_proj);
3245         if (false_block != NULL) {
3246                 add_immBlock_pred(false_block, false_proj);
3247         }
3248
3249         set_cur_block(NULL);
3250         return cond_expr;
3251 }
3252
3253
3254
3255 static void create_declaration_entity(declaration_t *declaration,
3256                                       declaration_kind_t declaration_kind,
3257                                       ir_type *parent_type)
3258 {
3259         type_t    *const type   = skip_typeref(declaration->type);
3260         if (is_type_function(type)) {
3261                 (void) get_function_entity(declaration);
3262                 return;
3263         }
3264
3265         ident     *const id     = new_id_from_str(declaration->symbol->string);
3266         ir_type   *const irtype = get_ir_type(type);
3267         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
3268         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
3269
3270         handle_gnu_attributes_ent(entity, declaration);
3271
3272         declaration->declaration_kind = (unsigned char) declaration_kind;
3273         declaration->v.entity         = entity;
3274         set_entity_variability(entity, variability_uninitialized);
3275         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3276         if (parent_type == get_tls_type())
3277                 set_entity_allocation(entity, allocation_automatic);
3278         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3279                 set_entity_allocation(entity, allocation_static);
3280
3281         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3282                 set_entity_volatility(entity, volatility_is_volatile);
3283         }
3284 }
3285
3286
3287 typedef struct type_path_entry_t type_path_entry_t;
3288 struct type_path_entry_t {
3289         type_t           *type;
3290         ir_initializer_t *initializer;
3291         size_t            index;
3292         declaration_t    *compound_entry;
3293 };
3294
3295 typedef struct type_path_t type_path_t;
3296 struct type_path_t {
3297         type_path_entry_t *path;
3298         type_t            *top_type;
3299         bool               invalid;
3300 };
3301
3302 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3303 {
3304         size_t len = ARR_LEN(path->path);
3305
3306         for(size_t i = 0; i < len; ++i) {
3307                 const type_path_entry_t *entry = & path->path[i];
3308
3309                 type_t *type = skip_typeref(entry->type);
3310                 if (is_type_compound(type)) {
3311                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
3312                 } else if (is_type_array(type)) {
3313                         fprintf(stderr, "[%zd]", entry->index);
3314                 } else {
3315                         fprintf(stderr, "-INVALID-");
3316                 }
3317         }
3318         fprintf(stderr, "  (");
3319         print_type(path->top_type);
3320         fprintf(stderr, ")");
3321 }
3322
3323 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3324 {
3325         size_t len = ARR_LEN(path->path);
3326         assert(len > 0);
3327         return & path->path[len-1];
3328 }
3329
3330 static type_path_entry_t *append_to_type_path(type_path_t *path)
3331 {
3332         size_t len = ARR_LEN(path->path);
3333         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3334
3335         type_path_entry_t *result = & path->path[len];
3336         memset(result, 0, sizeof(result[0]));
3337         return result;
3338 }
3339
3340 static size_t get_compound_size(const compound_type_t *type)
3341 {
3342         declaration_t *declaration = type->declaration;
3343         declaration_t *member      = declaration->scope.declarations;
3344         size_t         size        = 0;
3345         for( ; member != NULL; member = member->next) {
3346                 ++size;
3347         }
3348         /* TODO: cache results? */
3349
3350         return size;
3351 }
3352
3353 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3354 {
3355         type_t *orig_top_type = path->top_type;
3356         type_t *top_type      = skip_typeref(orig_top_type);
3357
3358         assert(is_type_compound(top_type) || is_type_array(top_type));
3359
3360         if (ARR_LEN(path->path) == 0) {
3361                 return NULL;
3362         } else {
3363                 type_path_entry_t *top         = get_type_path_top(path);
3364                 ir_initializer_t  *initializer = top->initializer;
3365                 return get_initializer_compound_value(initializer, top->index);
3366         }
3367 }
3368
3369 static void descend_into_subtype(type_path_t *path)
3370 {
3371         type_t *orig_top_type = path->top_type;
3372         type_t *top_type      = skip_typeref(orig_top_type);
3373
3374         assert(is_type_compound(top_type) || is_type_array(top_type));
3375
3376         ir_initializer_t *initializer = get_initializer_entry(path);
3377
3378         type_path_entry_t *top = append_to_type_path(path);
3379         top->type              = top_type;
3380
3381         size_t len;
3382
3383         if (is_type_compound(top_type)) {
3384                 declaration_t *declaration = top_type->compound.declaration;
3385                 declaration_t *entry       = declaration->scope.declarations;
3386
3387                 top->compound_entry = entry;
3388                 top->index          = 0;
3389                 len                 = get_compound_size(&top_type->compound);
3390                 if (entry != NULL)
3391                         path->top_type = entry->type;
3392         } else {
3393                 assert(is_type_array(top_type));
3394                 assert(top_type->array.size > 0);
3395
3396                 top->index     = 0;
3397                 path->top_type = top_type->array.element_type;
3398                 len            = top_type->array.size;
3399         }
3400         if (initializer == NULL
3401                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3402                 initializer = create_initializer_compound(len);
3403                 /* we have to set the entry at the 2nd latest path entry... */
3404                 size_t path_len = ARR_LEN(path->path);
3405                 assert(path_len >= 1);
3406                 if (path_len > 1) {
3407                         type_path_entry_t *entry        = & path->path[path_len-2];
3408                         ir_initializer_t  *tinitializer = entry->initializer;
3409                         set_initializer_compound_value(tinitializer, entry->index,
3410                                                        initializer);
3411                 }
3412         }
3413         top->initializer = initializer;
3414 }
3415
3416 static void ascend_from_subtype(type_path_t *path)
3417 {
3418         type_path_entry_t *top = get_type_path_top(path);
3419
3420         path->top_type = top->type;
3421
3422         size_t len = ARR_LEN(path->path);
3423         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3424 }
3425
3426 static void walk_designator(type_path_t *path, const designator_t *designator)
3427 {
3428         /* designators start at current object type */
3429         ARR_RESIZE(type_path_entry_t, path->path, 1);
3430
3431         for( ; designator != NULL; designator = designator->next) {
3432                 type_path_entry_t *top         = get_type_path_top(path);
3433                 type_t            *orig_type   = top->type;
3434                 type_t            *type        = skip_typeref(orig_type);
3435
3436                 if (designator->symbol != NULL) {
3437                         assert(is_type_compound(type));
3438                         size_t    index  = 0;
3439                         symbol_t *symbol = designator->symbol;
3440
3441                         declaration_t *declaration = type->compound.declaration;
3442                         declaration_t *iter        = declaration->scope.declarations;
3443                         for( ; iter != NULL; iter = iter->next, ++index) {
3444                                 if (iter->symbol == symbol) {
3445                                         break;
3446                                 }
3447                         }
3448                         assert(iter != NULL);
3449
3450                         top->type           = orig_type;
3451                         top->compound_entry = iter;
3452                         top->index          = index;
3453                         orig_type           = iter->type;
3454                 } else {
3455                         expression_t *array_index = designator->array_index;
3456                         assert(designator->array_index != NULL);
3457                         assert(is_type_array(type));
3458                         assert(is_type_valid(array_index->base.type));
3459
3460                         long index = fold_constant(array_index);
3461                         assert(index >= 0);
3462 #ifndef NDEBUG
3463                         if (type->array.size_constant) {
3464                                 long array_size = type->array.size;
3465                                 assert(index < array_size);
3466                         }
3467 #endif
3468
3469                         top->type  = orig_type;
3470                         top->index = (size_t) index;
3471                         orig_type  = type->array.element_type;
3472                 }
3473                 path->top_type = orig_type;
3474
3475                 if (designator->next != NULL) {
3476                         descend_into_subtype(path);
3477                 }
3478         }
3479
3480         path->invalid  = false;
3481 }
3482
3483 static void advance_current_object(type_path_t *path)
3484 {
3485         if (path->invalid) {
3486                 /* TODO: handle this... */
3487                 panic("invalid initializer in ast2firm (excessive elements)");
3488                 return;
3489         }
3490
3491         type_path_entry_t *top = get_type_path_top(path);
3492
3493         type_t *type = skip_typeref(top->type);
3494         if (is_type_union(type)) {
3495                 top->compound_entry = NULL;
3496         } else if (is_type_struct(type)) {
3497                 declaration_t *entry = top->compound_entry;
3498
3499                 top->index++;
3500                 entry               = entry->next;
3501                 top->compound_entry = entry;
3502                 if (entry != NULL) {
3503                         path->top_type = entry->type;
3504                         return;
3505                 }
3506         } else {
3507                 assert(is_type_array(type));
3508
3509                 top->index++;
3510                 if (!type->array.size_constant || top->index < type->array.size) {
3511                         return;
3512                 }
3513         }
3514
3515         /* we're past the last member of the current sub-aggregate, try if we
3516          * can ascend in the type hierarchy and continue with another subobject */
3517         size_t len = ARR_LEN(path->path);
3518
3519         if (len > 1) {
3520                 ascend_from_subtype(path);
3521                 advance_current_object(path);
3522         } else {
3523                 path->invalid = true;
3524         }
3525 }
3526
3527
3528 static ir_initializer_t *create_ir_initializer(
3529                 const initializer_t *initializer, type_t *type);
3530
3531 static ir_initializer_t *create_ir_initializer_value(
3532                 const initializer_value_t *initializer)
3533 {
3534         if (is_type_compound(initializer->value->base.type)) {
3535                 panic("initializer creation for compounds not implemented yet");
3536         }
3537         ir_node *value = expression_to_firm(initializer->value);
3538         return create_initializer_const(value);
3539 }
3540
3541 static ir_initializer_t *create_ir_initializer_list(
3542                 const initializer_list_t *initializer, type_t *type)
3543 {
3544         type_path_t path;
3545         memset(&path, 0, sizeof(path));
3546         path.top_type = type;
3547         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3548
3549         descend_into_subtype(&path);
3550
3551         for(size_t i = 0; i < initializer->len; ++i) {
3552                 const initializer_t *sub_initializer = initializer->initializers[i];
3553
3554                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3555                         walk_designator(&path, sub_initializer->designator.designator);
3556                         continue;
3557                 }
3558
3559                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3560                         /* we might have to descend into types until we're at a scalar
3561                          * type */
3562                         while(true) {
3563                                 type_t *orig_top_type = path.top_type;
3564                                 type_t *top_type      = skip_typeref(orig_top_type);
3565
3566                                 if (is_type_scalar(top_type))
3567                                         break;
3568                                 descend_into_subtype(&path);
3569                         }
3570                 }
3571
3572                 ir_initializer_t *sub_irinitializer
3573                         = create_ir_initializer(sub_initializer, path.top_type);
3574
3575                 size_t path_len = ARR_LEN(path.path);
3576                 assert(path_len >= 1);
3577                 type_path_entry_t *entry        = & path.path[path_len-1];
3578                 ir_initializer_t  *tinitializer = entry->initializer;
3579                 set_initializer_compound_value(tinitializer, entry->index,
3580                                                sub_irinitializer);
3581
3582                 advance_current_object(&path);
3583         }
3584
3585         assert(ARR_LEN(path.path) >= 1);
3586         ir_initializer_t *result = path.path[0].initializer;
3587         DEL_ARR_F(path.path);
3588
3589         return result;
3590 }
3591
3592 static ir_initializer_t *create_ir_initializer_string(
3593                 const initializer_string_t *initializer, type_t *type)
3594 {
3595         type = skip_typeref(type);
3596
3597         size_t            string_len    = initializer->string.size;
3598         assert(type->kind == TYPE_ARRAY);
3599         assert(type->array.size_constant);
3600         size_t            len           = type->array.size;
3601         ir_initializer_t *irinitializer = create_initializer_compound(len);
3602
3603         const char *string = initializer->string.begin;
3604         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3605
3606         for(size_t i = 0; i < len; ++i) {
3607                 char c = 0;
3608                 if (i < string_len)
3609                         c = string[i];
3610
3611                 tarval           *tv = new_tarval_from_long(c, mode);
3612                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3613
3614                 set_initializer_compound_value(irinitializer, i, char_initializer);
3615         }
3616
3617         return irinitializer;
3618 }
3619
3620 static ir_initializer_t *create_ir_initializer_wide_string(
3621                 const initializer_wide_string_t *initializer, type_t *type)
3622 {
3623         size_t            string_len    = initializer->string.size;
3624         assert(type->kind == TYPE_ARRAY);
3625         assert(type->array.size_constant);
3626         size_t            len           = type->array.size;
3627         ir_initializer_t *irinitializer = create_initializer_compound(len);
3628
3629         const wchar_rep_t *string = initializer->string.begin;
3630         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3631
3632         for(size_t i = 0; i < len; ++i) {
3633                 wchar_rep_t c = 0;
3634                 if (i < string_len) {
3635                         c = string[i];
3636                 }
3637                 tarval *tv = new_tarval_from_long(c, mode);
3638                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3639
3640                 set_initializer_compound_value(irinitializer, i, char_initializer);
3641         }
3642
3643         return irinitializer;
3644 }
3645
3646 static ir_initializer_t *create_ir_initializer(
3647                 const initializer_t *initializer, type_t *type)
3648 {
3649         switch(initializer->kind) {
3650                 case INITIALIZER_STRING:
3651                         return create_ir_initializer_string(&initializer->string, type);
3652
3653                 case INITIALIZER_WIDE_STRING:
3654                         return create_ir_initializer_wide_string(&initializer->wide_string,
3655                                                                  type);
3656
3657                 case INITIALIZER_LIST:
3658                         return create_ir_initializer_list(&initializer->list, type);
3659
3660                 case INITIALIZER_VALUE:
3661                         return create_ir_initializer_value(&initializer->value);
3662
3663                 case INITIALIZER_DESIGNATOR:
3664                         panic("unexpected designator initializer found");
3665         }
3666         panic("unknown initializer");
3667 }
3668
3669 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3670                 ir_node *base_addr)
3671 {
3672         if (is_atomic_type(type)) {
3673                 ir_mode *mode = get_type_mode(type);
3674                 tarval  *zero = get_mode_null(mode);
3675                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3676
3677                 /* TODO: bitfields */
3678                 ir_node *mem    = get_store();
3679                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3680                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3681                 set_store(proj_m);
3682         } else {
3683                 assert(is_compound_type(type));
3684
3685                 int n_members;
3686                 if (is_Array_type(type)) {
3687                         assert(has_array_upper_bound(type, 0));
3688                         n_members = get_array_upper_bound_int(type, 0);
3689                 } else {
3690                         n_members = get_compound_n_members(type);
3691                 }
3692
3693                 for(int i = 0; i < n_members; ++i) {
3694                         ir_node *addr;
3695                         ir_type *irtype;
3696                         if (is_Array_type(type)) {
3697                                 ir_entity *entity   = get_array_element_entity(type);
3698                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3699                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3700                                 ir_node   *in[1]    = { cnst };
3701                                 irtype = get_array_element_type(type);
3702                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3703                         } else {
3704                                 ir_entity *member = get_compound_member(type, i);
3705
3706                                 irtype = get_entity_type(member);
3707                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3708                         }
3709
3710                         create_dynamic_null_initializer(irtype, dbgi, addr);
3711                 }
3712         }
3713 }
3714
3715 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3716                 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3717 {
3718         switch(get_initializer_kind(initializer)) {
3719         case IR_INITIALIZER_NULL: {
3720                 create_dynamic_null_initializer(type, dbgi, base_addr);
3721                 return;
3722         }
3723         case IR_INITIALIZER_CONST: {
3724                 ir_node *node = get_initializer_const_value(initializer);
3725                 ir_mode *mode = get_irn_mode(node);
3726                 assert(get_type_mode(type) == mode);
3727
3728                 /* TODO: bitfields... */
3729                 ir_node *mem    = get_store();
3730                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3731                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3732                 set_store(proj_m);
3733                 return;
3734         }
3735         case IR_INITIALIZER_TARVAL: {
3736                 tarval  *tv   = get_initializer_tarval_value(initializer);
3737                 ir_mode *mode = get_tarval_mode(tv);
3738                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3739                 assert(get_type_mode(type) == mode);
3740
3741                 /* TODO: bitfields... */
3742                 ir_node *mem    = get_store();
3743                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3744                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3745                 set_store(proj_m);
3746                 return;
3747         }
3748         case IR_INITIALIZER_COMPOUND: {
3749                 assert(is_compound_type(type));
3750                 int n_members;
3751                 if (is_Array_type(type)) {
3752                         assert(has_array_upper_bound(type, 0));
3753                         n_members = get_array_upper_bound_int(type, 0);
3754                 } else {
3755                         n_members = get_compound_n_members(type);
3756                 }
3757
3758                 if (get_initializer_compound_n_entries(initializer)
3759                                 != (unsigned) n_members)
3760                         panic("initializer doesn't match compound type");
3761
3762                 for(int i = 0; i < n_members; ++i) {
3763                         ir_node *addr;
3764                         ir_type *irtype;
3765                         if (is_Array_type(type)) {
3766                                 ir_entity *entity   = get_array_element_entity(type);
3767                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3768                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3769                                 ir_node   *in[1]    = { cnst };
3770                                 irtype = get_array_element_type(type);
3771                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3772                         } else {
3773                                 ir_entity *member = get_compound_member(type, i);
3774
3775                                 irtype = get_entity_type(member);
3776                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3777                         }
3778
3779                         ir_initializer_t *sub_init
3780                                 = get_initializer_compound_value(initializer, i);
3781
3782                         create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3783                 }
3784                 return;
3785         }
3786         }
3787
3788         panic("invalid IR_INITIALIZER found");
3789 }
3790
3791 static void create_dynamic_initializer(ir_initializer_t *initializer,
3792                 dbg_info *dbgi, ir_entity *entity)
3793 {
3794         ir_node *frame     = get_local_frame(entity);
3795         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3796         ir_type *type      = get_entity_type(entity);
3797
3798         create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3799 }
3800
3801 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3802                                      ir_entity *entity, type_t *type)
3803 {
3804         ir_node *memory = get_store();
3805         ir_node *nomem  = new_NoMem();
3806         ir_node *frame  = get_irg_frame(current_ir_graph);
3807         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3808
3809         if (initializer->kind == INITIALIZER_VALUE) {
3810                 initializer_value_t *initializer_value = &initializer->value;
3811
3812                 ir_node *value = expression_to_firm(initializer_value->value);
3813                 type = skip_typeref(type);
3814                 assign_value(dbgi, addr, type, value);
3815                 return;
3816         }
3817
3818         if (!is_constant_initializer(initializer)) {
3819                 ir_initializer_t *irinitializer
3820                         = create_ir_initializer(initializer, type);
3821
3822                 create_dynamic_initializer(irinitializer, dbgi, entity);
3823                 return;
3824         }
3825
3826         /* create the ir_initializer */
3827         ir_graph *const old_current_ir_graph = current_ir_graph;
3828         current_ir_graph = get_const_code_irg();
3829
3830         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3831
3832         assert(current_ir_graph == get_const_code_irg());
3833         current_ir_graph = old_current_ir_graph;
3834
3835         /* create a "template" entity which is copied to the entity on the stack */
3836         ident     *const id          = id_unique("initializer.%u");
3837         ir_type   *const irtype      = get_ir_type(type);
3838         ir_type   *const global_type = get_glob_type();
3839         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3840         set_entity_ld_ident(init_entity, id);
3841
3842         set_entity_variability(init_entity, variability_initialized);
3843         set_entity_visibility(init_entity, visibility_local);
3844         set_entity_allocation(init_entity, allocation_static);
3845
3846         set_entity_initializer(init_entity, irinitializer);
3847
3848         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3849         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3850
3851         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3852         set_store(copyb_mem);
3853 }
3854
3855 static void create_initializer_local_variable_entity(declaration_t *declaration)
3856 {
3857         initializer_t *initializer = declaration->init.initializer;
3858         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3859         ir_entity     *entity      = declaration->v.entity;
3860         type_t        *type        = declaration->type;
3861         create_local_initializer(initializer, dbgi, entity, type);
3862 }
3863
3864 static void create_declaration_initializer(declaration_t *declaration)
3865 {
3866         initializer_t *initializer = declaration->init.initializer;
3867         if (initializer == NULL)
3868                 return;
3869
3870         declaration_kind_t declaration_kind
3871                 = (declaration_kind_t) declaration->declaration_kind;
3872         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3873                 create_initializer_local_variable_entity(declaration);
3874                 return;
3875         }
3876
3877         type_t            *type = declaration->type;
3878         type_qualifiers_t  tq   = get_type_qualifier(type, true);
3879
3880         if (initializer->kind == INITIALIZER_VALUE) {
3881                 initializer_value_t *initializer_value = &initializer->value;
3882                 dbg_info            *dbgi
3883                         = get_dbg_info(&declaration->source_position);
3884
3885                 ir_node *value = expression_to_firm(initializer_value->value);
3886                 value = do_strict_conv(dbgi, value);
3887
3888                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3889                         set_value(declaration->v.value_number, value);
3890                 } else {
3891                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3892
3893                         ir_entity *entity = declaration->v.entity;
3894
3895                         if (tq & TYPE_QUALIFIER_CONST) {
3896                                 set_entity_variability(entity, variability_constant);
3897                         } else {
3898                                 set_entity_variability(entity, variability_initialized);
3899                         }
3900                         set_atomic_ent_value(entity, value);
3901                 }
3902         } else {
3903                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
3904                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3905
3906                 ir_entity        *entity        = declaration->v.entity;
3907                 ir_initializer_t *irinitializer
3908                         = create_ir_initializer(initializer, type);
3909
3910                 if (tq & TYPE_QUALIFIER_CONST) {
3911                         set_entity_variability(entity, variability_constant);
3912                 } else {
3913                         set_entity_variability(entity, variability_initialized);
3914                 }
3915                 set_entity_initializer(entity, irinitializer);
3916         }
3917 }
3918
3919 static void create_variable_length_array(declaration_t *declaration)
3920 {
3921         /* initializers are not allowed for VLAs */
3922         assert(declaration->init.initializer == NULL);
3923
3924         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3925         declaration->v.vla_base       = NULL;
3926
3927         /* TODO: record VLA somewhere so we create the free node when we leave
3928          * it's scope */
3929 }
3930
3931 static void allocate_variable_length_array(declaration_t *declaration)
3932 {
3933         /* initializers are not allowed for VLAs */
3934         assert(declaration->init.initializer == NULL);
3935         assert(get_cur_block() != NULL);
3936
3937         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3938         type_t   *type      = declaration->type;
3939         ir_type  *el_type   = get_ir_type(type->array.element_type);
3940
3941         /* make sure size_node is calculated */
3942         get_type_size(type);
3943         ir_node  *elems = type->array.size_node;
3944         ir_node  *mem   = get_store();
3945         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3946
3947         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3948         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3949         set_store(proj_m);
3950
3951         assert(declaration->declaration_kind
3952                         == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3953         declaration->v.vla_base       = addr;
3954 }
3955
3956 /**
3957  * Creates a Firm local variable from a declaration.
3958  */
3959 static void create_local_variable(declaration_t *declaration)
3960 {
3961         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3962
3963         bool needs_entity = declaration->address_taken;
3964         type_t *type = skip_typeref(declaration->type);
3965
3966         /* is it a variable length array? */
3967         if (is_type_array(type) && !type->array.size_constant) {
3968                 create_variable_length_array(declaration);
3969                 return;
3970         } else if (is_type_array(type) || is_type_compound(type)) {
3971                 needs_entity = true;
3972         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3973                 needs_entity = true;
3974         }
3975
3976         if (needs_entity) {
3977                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3978                 create_declaration_entity(declaration,
3979                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3980                                           frame_type);
3981         } else {
3982                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3983                 declaration->v.value_number   = next_value_number_function;
3984                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3985                 ++next_value_number_function;
3986         }
3987 }
3988
3989 static void create_local_static_variable(declaration_t *declaration)
3990 {
3991         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3992
3993         type_t    *const type        = skip_typeref(declaration->type);
3994         ir_type   *const global_type = get_glob_type();
3995         ir_type   *const irtype      = get_ir_type(type);
3996         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3997
3998         size_t l = strlen(declaration->symbol->string);
3999         char   buf[l + sizeof(".%u")];
4000         snprintf(buf, sizeof(buf), "%s.%%u", declaration->symbol->string);
4001         ident     *const id = id_unique(buf);
4002
4003         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
4004
4005         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4006                 set_entity_volatility(entity, volatility_is_volatile);
4007         }
4008
4009         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4010         declaration->v.entity         = entity;
4011         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
4012         set_entity_variability(entity, variability_uninitialized);
4013         set_entity_visibility(entity, visibility_local);
4014         set_entity_allocation(entity, allocation_static);
4015
4016         ir_graph *const old_current_ir_graph = current_ir_graph;
4017         current_ir_graph = get_const_code_irg();
4018
4019         create_declaration_initializer(declaration);
4020
4021         assert(current_ir_graph == get_const_code_irg());
4022         current_ir_graph = old_current_ir_graph;
4023 }
4024
4025
4026
4027 static void return_statement_to_firm(return_statement_t *statement)
4028 {
4029         if (get_cur_block() == NULL)
4030                 return;
4031
4032         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4033         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
4034
4035
4036         ir_node *in[1];
4037         int      in_len;
4038         if (get_method_n_ress(func_irtype) > 0) {
4039                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4040
4041                 if (statement->value != NULL) {
4042                         ir_node *node = expression_to_firm(statement->value);
4043                         node  = do_strict_conv(dbgi, node);
4044                         in[0] = node;
4045                 } else {
4046                         ir_mode *mode;
4047                         if (is_compound_type(res_type)) {
4048                                 mode = mode_P_data;
4049                         } else {
4050                                 mode = get_type_mode(res_type);
4051                         }
4052                         in[0] = new_Unknown(mode);
4053                 }
4054                 in_len = 1;
4055         } else {
4056                 /* build return_value for its side effects */
4057                 if (statement->value != NULL) {
4058                         expression_to_firm(statement->value);
4059                 }
4060                 in_len = 0;
4061         }
4062
4063         ir_node  *store = get_store();
4064         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4065
4066         ir_node *end_block = get_irg_end_block(current_ir_graph);
4067         add_immBlock_pred(end_block, ret);
4068
4069         set_cur_block(NULL);
4070 }
4071
4072 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4073 {
4074         if (get_cur_block() == NULL)
4075                 return NULL;
4076
4077         return expression_to_firm(statement->expression);
4078 }
4079
4080 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4081 {
4082         declaration_t *declaration = compound->scope.declarations;
4083         for( ; declaration != NULL; declaration = declaration->next) {
4084                 create_local_declaration(declaration);
4085         }
4086
4087         ir_node     *result    = NULL;
4088         statement_t *statement = compound->statements;
4089         for( ; statement != NULL; statement = statement->base.next) {
4090                 if (statement->base.next == NULL
4091                                 && statement->kind == STATEMENT_EXPRESSION) {
4092                         result = expression_statement_to_firm(
4093                                         &statement->expression);
4094                         break;
4095                 }
4096                 statement_to_firm(statement);
4097         }
4098
4099         return result;
4100 }
4101
4102 static void create_global_variable(declaration_t *declaration)
4103 {
4104         ir_visibility  vis;
4105         ir_type       *var_type;
4106         switch ((storage_class_tag_t)declaration->storage_class) {
4107                 case STORAGE_CLASS_STATIC:
4108                         vis = visibility_local;
4109                         goto global_var;
4110
4111                 case STORAGE_CLASS_EXTERN:
4112                         vis = visibility_external_allocated;
4113                         goto global_var;
4114
4115                 case STORAGE_CLASS_NONE:
4116                         vis = visibility_external_visible;
4117                         goto global_var;
4118
4119                 case STORAGE_CLASS_THREAD:
4120                         vis = visibility_external_visible;
4121                         goto tls_var;
4122
4123                 case STORAGE_CLASS_THREAD_EXTERN:
4124                         vis = visibility_external_allocated;
4125                         goto tls_var;
4126
4127                 case STORAGE_CLASS_THREAD_STATIC:
4128                         vis = visibility_local;
4129                         goto tls_var;
4130
4131 tls_var:
4132                         var_type = get_tls_type();
4133                         goto create_var;
4134
4135 global_var:
4136                         var_type = get_glob_type();
4137                         goto create_var;
4138
4139 create_var:
4140                         create_declaration_entity(declaration,
4141                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
4142                                                   var_type);
4143                         if (!is_type_function(skip_typeref(declaration->type))) {
4144                                 set_entity_visibility(declaration->v.entity, vis);
4145                         }
4146
4147                         return;
4148
4149                 case STORAGE_CLASS_TYPEDEF:
4150                 case STORAGE_CLASS_AUTO:
4151                 case STORAGE_CLASS_REGISTER:
4152                 case STORAGE_CLASS_ENUM_ENTRY:
4153                         break;
4154         }
4155         panic("Invalid storage class for global variable");
4156 }
4157
4158 static void create_local_declaration(declaration_t *declaration)
4159 {
4160         if (declaration->namespc != NAMESPACE_NORMAL)
4161                 return;
4162         /* construct type */
4163         (void) get_ir_type(declaration->type);
4164         if (declaration->symbol == NULL) {
4165                 return;
4166         }
4167
4168         type_t *type = skip_typeref(declaration->type);
4169
4170         switch ((storage_class_tag_t) declaration->storage_class) {
4171         case STORAGE_CLASS_STATIC:
4172                 create_local_static_variable(declaration);
4173                 return;
4174         case STORAGE_CLASS_EXTERN:
4175                 create_global_variable(declaration);
4176                 create_declaration_initializer(declaration);
4177                 return;
4178         case STORAGE_CLASS_NONE:
4179         case STORAGE_CLASS_AUTO:
4180         case STORAGE_CLASS_REGISTER:
4181                 if (is_type_function(type)) {
4182                         if (declaration->init.statement != NULL) {
4183                                 get_function_entity(declaration);
4184                                 declaration->declaration_kind = DECLARATION_KIND_INNER_FUNCTION;
4185                                 enqueue_inner_function(declaration);
4186                         } else {
4187                                 get_function_entity(declaration);
4188                         }
4189                 } else {
4190                         create_local_variable(declaration);
4191                 }
4192                 return;
4193         case STORAGE_CLASS_ENUM_ENTRY:
4194                 /* should already be handled */
4195                 assert(declaration->declaration_kind == DECLARATION_KIND_ENUM_ENTRY);
4196                 return;
4197         case STORAGE_CLASS_TYPEDEF:
4198                 declaration->declaration_kind = DECLARATION_KIND_TYPE;
4199                 return;
4200         case STORAGE_CLASS_THREAD:
4201         case STORAGE_CLASS_THREAD_EXTERN:
4202         case STORAGE_CLASS_THREAD_STATIC:
4203                 break;
4204         }
4205         panic("invalid storage class found");
4206 }
4207
4208 static void initialize_local_declaration(declaration_t *declaration)
4209 {
4210         if (declaration->symbol == NULL || declaration->namespc != NAMESPACE_NORMAL)
4211                 return;
4212
4213         switch ((declaration_kind_t) declaration->declaration_kind) {
4214         case DECLARATION_KIND_LOCAL_VARIABLE:
4215         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4216                 create_declaration_initializer(declaration);
4217                 return;
4218
4219         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4220                 allocate_variable_length_array(declaration);
4221                 return;
4222
4223         case DECLARATION_KIND_LABEL_BLOCK:
4224         case DECLARATION_KIND_COMPOUND_MEMBER:
4225         case DECLARATION_KIND_GLOBAL_VARIABLE:
4226         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
4227         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
4228         case DECLARATION_KIND_FUNCTION:
4229         case DECLARATION_KIND_TYPE:
4230         case DECLARATION_KIND_ENUM_ENTRY:
4231         case DECLARATION_KIND_INNER_FUNCTION:
4232                 return;
4233
4234         case DECLARATION_KIND_UNKNOWN:
4235                 panic("can't initialize unknown declaration");
4236         }
4237         panic("invalid declaration kind");
4238 }
4239
4240 static void declaration_statement_to_firm(declaration_statement_t *statement)
4241 {
4242         declaration_t *declaration = statement->declarations_begin;
4243         declaration_t *end         = statement->declarations_end->next;
4244         for( ; declaration != end; declaration = declaration->next) {
4245                 if (declaration->namespc != NAMESPACE_NORMAL)
4246                         continue;
4247                 initialize_local_declaration(declaration);
4248         }
4249 }
4250
4251 static void if_statement_to_firm(if_statement_t *statement)
4252 {
4253         ir_node *cur_block = get_cur_block();
4254
4255         ir_node *fallthrough_block = NULL;
4256
4257         /* the true (blocks) */
4258         ir_node *true_block = NULL;
4259         if (statement->true_statement != NULL) {
4260                 true_block = new_immBlock();
4261                 statement_to_firm(statement->true_statement);
4262                 if (get_cur_block() != NULL) {
4263                         ir_node *jmp = new_Jmp();
4264                         if (fallthrough_block == NULL)
4265                                 fallthrough_block = new_immBlock();
4266                         add_immBlock_pred(fallthrough_block, jmp);
4267                 }
4268         }
4269
4270         /* the false (blocks) */
4271         ir_node *false_block = NULL;
4272         if (statement->false_statement != NULL) {
4273                 false_block = new_immBlock();
4274
4275                 statement_to_firm(statement->false_statement);
4276                 if (get_cur_block() != NULL) {
4277                         ir_node *jmp = new_Jmp();
4278                         if (fallthrough_block == NULL)
4279                                 fallthrough_block = new_immBlock();
4280                         add_immBlock_pred(fallthrough_block, jmp);
4281                 }
4282         }
4283
4284         /* create the condition */
4285         if (cur_block != NULL) {
4286                 if (true_block == NULL || false_block == NULL) {
4287                         if (fallthrough_block == NULL)
4288                                 fallthrough_block = new_immBlock();
4289                         if (true_block == NULL)
4290                                 true_block = fallthrough_block;
4291                         if (false_block == NULL)
4292                                 false_block = fallthrough_block;
4293                 }
4294
4295                 set_cur_block(cur_block);
4296                 create_condition_evaluation(statement->condition, true_block,
4297                                             false_block);
4298         }
4299
4300         mature_immBlock(true_block);
4301         if (false_block != fallthrough_block && false_block != NULL) {
4302                 mature_immBlock(false_block);
4303         }
4304         if (fallthrough_block != NULL) {
4305                 mature_immBlock(fallthrough_block);
4306         }
4307
4308         set_cur_block(fallthrough_block);
4309 }
4310
4311 static void while_statement_to_firm(while_statement_t *statement)
4312 {
4313         ir_node *jmp = NULL;
4314         if (get_cur_block() != NULL) {
4315                 jmp = new_Jmp();
4316         }
4317
4318         /* create the header block */
4319         ir_node *header_block = new_immBlock();
4320         if (jmp != NULL) {
4321                 add_immBlock_pred(header_block, jmp);
4322         }
4323
4324         /* the loop body */
4325         ir_node *old_continue_label = continue_label;
4326         ir_node *old_break_label    = break_label;
4327         continue_label              = header_block;
4328         break_label                 = NULL;
4329
4330         ir_node *body_block = new_immBlock();
4331         statement_to_firm(statement->body);
4332         ir_node *false_block = break_label;
4333
4334         assert(continue_label == header_block);
4335         continue_label = old_continue_label;
4336         break_label    = old_break_label;
4337
4338         if (get_cur_block() != NULL) {
4339                 jmp = new_Jmp();
4340                 add_immBlock_pred(header_block, jmp);
4341         }
4342
4343         /* shortcut for while(true) */
4344         if (is_constant_expression(statement->condition)
4345                         && fold_constant(statement->condition) != 0) {
4346                 set_cur_block(header_block);
4347                 ir_node *header_jmp = new_Jmp();
4348                 add_immBlock_pred(body_block, header_jmp);
4349
4350                 keep_alive(body_block);
4351                 keep_all_memory(body_block);
4352                 set_cur_block(body_block);
4353         } else {
4354                 if (false_block == NULL) {
4355                         false_block = new_immBlock();
4356                 }
4357
4358                 /* create the condition */
4359                 set_cur_block(header_block);
4360
4361                 create_condition_evaluation(statement->condition, body_block,
4362                                             false_block);
4363         }
4364
4365         mature_immBlock(body_block);
4366         mature_immBlock(header_block);
4367         if (false_block != NULL) {
4368                 mature_immBlock(false_block);
4369         }
4370
4371         set_cur_block(false_block);
4372 }
4373
4374 static void do_while_statement_to_firm(do_while_statement_t *statement)
4375 {
4376         ir_node *jmp = NULL;
4377         if (get_cur_block() != NULL) {
4378                 jmp = new_Jmp();
4379         }
4380
4381         /* create the header block */
4382         ir_node *header_block = new_immBlock();
4383
4384         /* the loop body */
4385         ir_node *body_block = new_immBlock();
4386         if (jmp != NULL) {
4387                 add_immBlock_pred(body_block, jmp);
4388         }
4389
4390         ir_node *old_continue_label = continue_label;
4391         ir_node *old_break_label    = break_label;
4392         continue_label              = header_block;
4393         break_label                 = NULL;
4394
4395         statement_to_firm(statement->body);
4396         ir_node *false_block = break_label;
4397
4398         assert(continue_label == header_block);
4399         continue_label = old_continue_label;
4400         break_label    = old_break_label;
4401
4402         if (get_cur_block() != NULL) {
4403                 ir_node *body_jmp = new_Jmp();
4404                 add_immBlock_pred(header_block, body_jmp);
4405                 mature_immBlock(header_block);
4406         }
4407
4408         if (false_block == NULL) {
4409                 false_block = new_immBlock();
4410         }
4411
4412         /* create the condition */
4413         set_cur_block(header_block);
4414
4415         create_condition_evaluation(statement->condition, body_block, false_block);
4416         mature_immBlock(body_block);
4417         mature_immBlock(header_block);
4418         if (false_block != NULL) {
4419                 mature_immBlock(false_block);
4420         }
4421
4422         set_cur_block(false_block);
4423 }
4424
4425 static void for_statement_to_firm(for_statement_t *statement)
4426 {
4427         ir_node *jmp = NULL;
4428
4429         /* create declarations */
4430         declaration_t *declaration = statement->scope.declarations;
4431         for( ; declaration != NULL; declaration = declaration->next) {
4432                 create_local_declaration(declaration);
4433         }
4434
4435         if (get_cur_block() != NULL) {
4436                 declaration = statement->scope.declarations;
4437                 for( ; declaration != NULL; declaration = declaration->next) {
4438                         initialize_local_declaration(declaration);
4439                 }
4440
4441                 if (statement->initialisation != NULL) {
4442                         expression_to_firm(statement->initialisation);
4443                 }
4444
4445                 jmp = new_Jmp();
4446         }
4447
4448
4449         /* create the step block */
4450         ir_node *const step_block = new_immBlock();
4451         if (statement->step != NULL) {
4452                 expression_to_firm(statement->step);
4453         }
4454         ir_node *const step_jmp = new_Jmp();
4455
4456         /* create the header block */
4457         ir_node *const header_block = new_immBlock();
4458         if (jmp != NULL) {
4459                 add_immBlock_pred(header_block, jmp);
4460         }
4461         add_immBlock_pred(header_block, step_jmp);
4462
4463         /* the false block */
4464         ir_node *const false_block = new_immBlock();
4465
4466         /* the loop body */
4467         ir_node * body_block;
4468         if (statement->body != NULL) {
4469                 ir_node *const old_continue_label = continue_label;
4470                 ir_node *const old_break_label    = break_label;
4471                 continue_label = step_block;
4472                 break_label    = false_block;
4473
4474                 body_block = new_immBlock();
4475                 statement_to_firm(statement->body);
4476
4477                 assert(continue_label == step_block);
4478                 assert(break_label    == false_block);
4479                 continue_label = old_continue_label;
4480                 break_label    = old_break_label;
4481
4482                 if (get_cur_block() != NULL) {
4483                         jmp = new_Jmp();
4484                         add_immBlock_pred(step_block, jmp);
4485                 }
4486         } else {
4487                 body_block = step_block;
4488         }
4489
4490         /* create the condition */
4491         set_cur_block(header_block);
4492         if (statement->condition != NULL) {
4493                 create_condition_evaluation(statement->condition, body_block,
4494                                             false_block);
4495         } else {
4496                 keep_alive(header_block);
4497                 keep_all_memory(header_block);
4498                 jmp = new_Jmp();
4499                 add_immBlock_pred(body_block, jmp);
4500         }
4501
4502         mature_immBlock(body_block);
4503         mature_immBlock(false_block);
4504         mature_immBlock(step_block);
4505         mature_immBlock(header_block);
4506         mature_immBlock(false_block);
4507
4508         set_cur_block(false_block);
4509 }
4510
4511 static void create_jump_statement(const statement_t *statement,
4512                                   ir_node *target_block)
4513 {
4514         if (get_cur_block() == NULL)
4515                 return;
4516
4517         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4518         ir_node  *jump = new_d_Jmp(dbgi);
4519         add_immBlock_pred(target_block, jump);
4520
4521         set_cur_block(NULL);
4522 }
4523
4524 static ir_node *get_break_label(void)
4525 {
4526         if (break_label == NULL) {
4527                 ir_node *cur_block = get_cur_block();
4528                 break_label = new_immBlock();
4529                 set_cur_block(cur_block);
4530         }
4531         return break_label;
4532 }
4533
4534 static void switch_statement_to_firm(switch_statement_t *statement)
4535 {
4536         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4537
4538         ir_node *expression  = expression_to_firm(statement->expression);
4539         ir_node *cond        = new_d_Cond(dbgi, expression);
4540
4541         set_cur_block(NULL);
4542
4543         ir_node *const old_switch_cond       = current_switch_cond;
4544         ir_node *const old_break_label       = break_label;
4545         const bool     old_saw_default_label = saw_default_label;
4546         saw_default_label                    = false;
4547         current_switch_cond                  = cond;
4548         break_label                          = NULL;
4549         switch_statement_t *const old_switch = current_switch;
4550         current_switch                       = statement;
4551
4552         /* determine a free number for the default label */
4553         unsigned long num_cases = 0;
4554         long def_nr = 0;
4555         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4556                 if (l->expression == NULL) {
4557                         /* default case */
4558                         continue;
4559                 }
4560                 if (l->last_case >= l->first_case)
4561                         num_cases += l->last_case - l->first_case;
4562                 if (l->last_case > def_nr)
4563                         def_nr = l->last_case;
4564         }
4565
4566         if (def_nr + 1 < 0) {
4567                 /* Bad: an overflow occurred, we cannot be sure that the
4568          * maximum + 1 is a free number. Scan the values a second
4569          * time to find a free number.
4570          */
4571                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4572                 unsigned long i;
4573
4574                 memset(bits, 0, (num_cases + 7) >> 3);
4575                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4576                         if (l->expression == NULL) {
4577                                 /* default case */
4578                                 continue;
4579                         }
4580                         for (long cns = l->first_case; cns <= l->last_case; ++cns) {
4581                                 if (cns >= 0 && (unsigned long)cns < num_cases)
4582                                         bits[cns >> 3] |= (1 << (cns & 7));
4583                         }
4584                 }
4585                 /* We look at the first num_cases constants:
4586                  * Either they are densed, so we took the last (num_cases)
4587                  * one, or they are non densed, so we will find one free
4588                  * there...
4589                  */
4590                 for (i = 0; i < num_cases; ++i)
4591                         if ((bits[i >> 3] & (i & 7)) == 0)
4592                                 break;
4593
4594                 free(bits);
4595                 def_nr = i;
4596         } else {
4597                 ++def_nr;
4598         }
4599         statement->default_proj_nr = def_nr;
4600
4601         if (statement->body != NULL) {
4602                 statement_to_firm(statement->body);
4603         }
4604
4605         if (get_cur_block() != NULL) {
4606                 ir_node *jmp = new_Jmp();
4607                 add_immBlock_pred(get_break_label(), jmp);
4608         }
4609
4610         if (!saw_default_label) {
4611                 set_cur_block(get_nodes_block(cond));
4612                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4613                                                         statement->default_proj_nr);
4614                 add_immBlock_pred(get_break_label(), proj);
4615         }
4616
4617         if (break_label != NULL) {
4618                 mature_immBlock(break_label);
4619         }
4620         set_cur_block(break_label);
4621
4622         assert(current_switch_cond == cond);
4623         current_switch      = old_switch;
4624         current_switch_cond = old_switch_cond;
4625         break_label         = old_break_label;
4626         saw_default_label   = old_saw_default_label;
4627 }
4628
4629 static void case_label_to_firm(const case_label_statement_t *statement)
4630 {
4631         if (statement->is_empty_range)
4632                 return;
4633
4634         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4635
4636         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4637
4638         ir_node *proj;
4639         ir_node *old_block = get_nodes_block(current_switch_cond);
4640         ir_node *block     = new_immBlock();
4641
4642         set_cur_block(old_block);
4643         if (statement->expression != NULL) {
4644                 long pn     = statement->first_case;
4645                 long end_pn = statement->last_case;
4646                 assert(pn <= end_pn);
4647                 /* create jumps for all cases in the given range */
4648                 do {
4649                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4650                         add_immBlock_pred(block, proj);
4651                 } while(pn++ < end_pn);
4652         } else {
4653                 saw_default_label = true;
4654                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4655                                          current_switch->default_proj_nr);
4656
4657                 add_immBlock_pred(block, proj);
4658         }
4659
4660         if (fallthrough != NULL) {
4661                 add_immBlock_pred(block, fallthrough);
4662         }
4663         mature_immBlock(block);
4664         set_cur_block(block);
4665
4666         if (statement->statement != NULL) {
4667                 statement_to_firm(statement->statement);
4668         }
4669 }
4670
4671 static void label_to_firm(const label_statement_t *statement)
4672 {
4673         ir_node *block = get_label_block(statement->label);
4674
4675         if (get_cur_block() != NULL) {
4676                 ir_node *jmp = new_Jmp();
4677                 add_immBlock_pred(block, jmp);
4678         }
4679
4680         set_cur_block(block);
4681         keep_alive(block);
4682         keep_all_memory(block);
4683
4684         if (statement->statement != NULL) {
4685                 statement_to_firm(statement->statement);
4686         }
4687 }
4688
4689 static void goto_to_firm(const goto_statement_t *statement)
4690 {
4691         if (get_cur_block() == NULL)
4692                 return;
4693
4694         if (statement->expression) {
4695                 ir_node  *irn  = expression_to_firm(statement->expression);
4696                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4697                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4698
4699                 set_irn_link(ijmp, ijmp_list);
4700                 ijmp_list = ijmp;
4701         } else {
4702                 if (statement->outer_fkt_jmp) {
4703                         /* TODO: this is a outer function jmp */
4704                         panic("outer function jump not implemented");
4705                 } else {
4706                         ir_node *block = get_label_block(statement->label);
4707                         ir_node *jmp   = new_Jmp();
4708                         add_immBlock_pred(block, jmp);
4709                 }
4710         }
4711         set_cur_block(NULL);
4712 }
4713
4714 static void asm_statement_to_firm(const asm_statement_t *statement)
4715 {
4716         bool needs_memory = false;
4717
4718         if (statement->is_volatile) {
4719                 needs_memory = true;
4720         }
4721
4722         size_t         n_clobbers = 0;
4723         asm_clobber_t *clobber    = statement->clobbers;
4724         for( ; clobber != NULL; clobber = clobber->next) {
4725                 const char *clobber_str = clobber->clobber.begin;
4726
4727                 if (!be_is_valid_clobber(clobber_str)) {
4728                         errorf(&statement->base.source_position,
4729                                    "invalid clobber '%s' specified", clobber->clobber);
4730                         continue;
4731                 }
4732
4733                 if (strcmp(clobber_str, "memory") == 0) {
4734                         needs_memory = true;
4735                         continue;
4736                 }
4737
4738                 ident *id = new_id_from_str(clobber_str);
4739                 obstack_ptr_grow(&asm_obst, id);
4740                 ++n_clobbers;
4741         }
4742         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4743         ident **clobbers = NULL;
4744         if (n_clobbers > 0) {
4745                 clobbers = obstack_finish(&asm_obst);
4746         }
4747
4748         size_t n_inputs  = 0;
4749         asm_argument_t *argument = statement->inputs;
4750         for ( ; argument != NULL; argument = argument->next)
4751                 n_inputs++;
4752         size_t n_outputs = 0;
4753         argument = statement->outputs;
4754         for ( ; argument != NULL; argument = argument->next)
4755                 n_outputs++;
4756
4757         unsigned next_pos = 0;
4758
4759         ir_node *ins[n_inputs + n_outputs + 1];
4760         size_t   in_size = 0;
4761
4762         ir_asm_constraint tmp_in_constraints[n_outputs];
4763
4764         const expression_t *out_exprs[n_outputs];
4765         ir_node            *out_addrs[n_outputs];
4766         size_t              out_size = 0;
4767
4768         argument = statement->outputs;
4769         for ( ; argument != NULL; argument = argument->next) {
4770                 const char *constraints = argument->constraints.begin;
4771                 asm_constraint_flags_t asm_flags
4772                         = be_parse_asm_constraints(constraints);
4773
4774                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4775                         errorf(&statement->base.source_position,
4776                                "some constraints in '%s' are not supported", constraints);
4777                         continue;
4778                 }
4779                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4780                         errorf(&statement->base.source_position,
4781                                "some constraints in '%s' are invalid", constraints);
4782                         continue;
4783                 }
4784                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4785                         errorf(&statement->base.source_position,
4786                                "no write flag specified for output constraints '%s'",
4787                                constraints);
4788                         continue;
4789                 }
4790
4791                 unsigned pos = next_pos++;
4792                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4793                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4794                         expression_t *expr = argument->expression;
4795                         ir_node      *addr = expression_to_addr(expr);
4796                         /* in+output, construct an artifical same_as constraint on the
4797                          * input */
4798                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4799                                 char     buf[64];
4800                                 ir_node *value = get_value_from_lvalue(expr, addr);
4801
4802                                 snprintf(buf, sizeof(buf), "%d", pos);
4803
4804                                 ir_asm_constraint constraint;
4805                                 constraint.pos              = pos;
4806                                 constraint.constraint       = new_id_from_str(buf);
4807                                 constraint.mode             = get_ir_mode(expr->base.type);
4808                                 tmp_in_constraints[in_size] = constraint;
4809                                 ins[in_size] = value;
4810
4811                                 ++in_size;
4812                         }
4813
4814                         out_exprs[out_size] = expr;
4815                         out_addrs[out_size] = addr;
4816                         ++out_size;
4817                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4818                         /* pure memory ops need no input (but we have to make sure we
4819                          * attach to the memory) */
4820                         assert(! (asm_flags &
4821                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4822                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4823                         needs_memory = true;
4824
4825                         /* we need to attach the address to the inputs */
4826                         expression_t *expr = argument->expression;
4827
4828                         ir_asm_constraint constraint;
4829                         constraint.pos              = pos;
4830                         constraint.constraint       = new_id_from_str(constraints);
4831                         constraint.mode             = NULL;
4832                         tmp_in_constraints[in_size] = constraint;
4833
4834                         ins[in_size]          = expression_to_addr(expr);
4835                         ++in_size;
4836                         continue;
4837                 } else {
4838                         errorf(&statement->base.source_position,
4839                                "only modifiers but no place set in constraints '%s'",
4840                                constraints);
4841                         continue;
4842                 }
4843
4844                 ir_asm_constraint constraint;
4845                 constraint.pos        = pos;
4846                 constraint.constraint = new_id_from_str(constraints);
4847                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4848
4849                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4850         }
4851         assert(obstack_object_size(&asm_obst)
4852                         == out_size * sizeof(ir_asm_constraint));
4853         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4854
4855
4856         obstack_grow(&asm_obst, tmp_in_constraints,
4857                      in_size * sizeof(tmp_in_constraints[0]));
4858         /* find and count input and output arguments */
4859         argument = statement->inputs;
4860         for( ; argument != NULL; argument = argument->next) {
4861                 const char *constraints = argument->constraints.begin;
4862                 asm_constraint_flags_t asm_flags
4863                         = be_parse_asm_constraints(constraints);
4864
4865                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4866                         errorf(&statement->base.source_position,
4867                                "some constraints in '%s' are not supported", constraints);
4868                         continue;
4869                 }
4870                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4871                         errorf(&statement->base.source_position,
4872                                "some constraints in '%s' are invalid", constraints);
4873                         continue;
4874                 }
4875                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4876                         errorf(&statement->base.source_position,
4877                                "write flag specified for input constraints '%s'",
4878                                constraints);
4879                         continue;
4880                 }
4881
4882                 ir_node *input;
4883                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4884                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4885                         /* we can treat this as "normal" input */
4886                         input = expression_to_firm(argument->expression);
4887                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4888                         /* pure memory ops need no input (but we have to make sure we
4889                          * attach to the memory) */
4890                         assert(! (asm_flags &
4891                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4892                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4893                         needs_memory = true;
4894                         input = expression_to_addr(argument->expression);
4895                 } else {
4896                         errorf(&statement->base.source_position,
4897                                "only modifiers but no place set in constraints '%s'",
4898                                constraints);
4899                         continue;
4900                 }
4901
4902                 ir_asm_constraint constraint;
4903                 constraint.pos        = next_pos++;
4904                 constraint.constraint = new_id_from_str(constraints);
4905                 constraint.mode       = get_irn_mode(input);
4906
4907                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4908                 ins[in_size++] = input;
4909         }
4910
4911         if (needs_memory) {
4912                 ir_asm_constraint constraint;
4913                 constraint.pos        = next_pos++;
4914                 constraint.constraint = new_id_from_str("");
4915                 constraint.mode       = mode_M;
4916
4917                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4918                 ins[in_size++] = get_store();
4919         }
4920
4921         assert(obstack_object_size(&asm_obst)
4922                         == in_size * sizeof(ir_asm_constraint));
4923         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4924
4925         /* create asm node */
4926         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4927
4928         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4929
4930         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4931                                   out_size, output_constraints,
4932                                   n_clobbers, clobbers, asm_text);
4933
4934         if (statement->is_volatile) {
4935                 set_irn_pinned(node, op_pin_state_pinned);
4936         } else {
4937                 set_irn_pinned(node, op_pin_state_floats);
4938         }
4939
4940         /* create output projs & connect them */
4941         if (needs_memory) {
4942                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4943                 set_store(projm);
4944         }
4945
4946         size_t i;
4947         for (i = 0; i < out_size; ++i) {
4948                 const expression_t *out_expr = out_exprs[i];
4949                 long                pn       = i;
4950                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4951                 ir_node            *proj     = new_Proj(node, mode, pn);
4952                 ir_node            *addr     = out_addrs[i];
4953
4954                 set_value_for_expression_addr(out_expr, proj, addr);
4955         }
4956 }
4957
4958 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4959         statement_to_firm(statement->try_statement);
4960         warningf(&statement->base.source_position, "structured exception handling ignored");
4961 }
4962
4963 static void     leave_statement_to_firm(leave_statement_t *statement) {
4964         errorf(&statement->base.source_position, "__leave not supported yet");
4965 }
4966
4967 /**
4968  * Transform a statement.
4969  */
4970 static void statement_to_firm(statement_t *statement)
4971 {
4972 #ifndef NDEBUG
4973         assert(!statement->base.transformed);
4974         statement->base.transformed = true;
4975 #endif
4976
4977         switch(statement->kind) {
4978         case STATEMENT_INVALID:
4979                 panic("invalid statement found");
4980                 return;
4981         case STATEMENT_EMPTY:
4982                 /* nothing */
4983                 return;
4984         case STATEMENT_COMPOUND:
4985                 compound_statement_to_firm(&statement->compound);
4986                 return;
4987         case STATEMENT_RETURN:
4988                 return_statement_to_firm(&statement->returns);
4989                 return;
4990         case STATEMENT_EXPRESSION:
4991                 expression_statement_to_firm(&statement->expression);
4992                 return;
4993         case STATEMENT_IF:
4994                 if_statement_to_firm(&statement->ifs);
4995                 return;
4996         case STATEMENT_WHILE:
4997                 while_statement_to_firm(&statement->whiles);
4998                 return;
4999         case STATEMENT_DO_WHILE:
5000                 do_while_statement_to_firm(&statement->do_while);
5001                 return;
5002         case STATEMENT_DECLARATION:
5003                 declaration_statement_to_firm(&statement->declaration);
5004                 return;
5005         case STATEMENT_BREAK:
5006                 create_jump_statement(statement, get_break_label());
5007                 return;
5008         case STATEMENT_CONTINUE:
5009                 create_jump_statement(statement, continue_label);
5010                 return;
5011         case STATEMENT_SWITCH:
5012                 switch_statement_to_firm(&statement->switchs);
5013                 return;
5014         case STATEMENT_CASE_LABEL:
5015                 case_label_to_firm(&statement->case_label);
5016                 return;
5017         case STATEMENT_FOR:
5018                 for_statement_to_firm(&statement->fors);
5019                 return;
5020         case STATEMENT_LABEL:
5021                 label_to_firm(&statement->label);
5022                 return;
5023         case STATEMENT_GOTO:
5024                 goto_to_firm(&statement->gotos);
5025                 return;
5026         case STATEMENT_ASM:
5027                 asm_statement_to_firm(&statement->asms);
5028                 return;
5029         case STATEMENT_MS_TRY:
5030                 ms_try_statement_to_firm(&statement->ms_try);
5031                 return;
5032         case STATEMENT_LEAVE:
5033                 leave_statement_to_firm(&statement->leave);
5034                 return;
5035         }
5036         panic("Statement not implemented\n");
5037 }
5038
5039 static int count_decls_in_expression(const expression_t *expression);
5040
5041 static int count_local_declarations(const declaration_t *      decl,
5042                                     const declaration_t *const end)
5043 {
5044         int count = 0;
5045         for (; decl != end; decl = decl->next) {
5046                 if (decl->namespc != NAMESPACE_NORMAL)
5047                         continue;
5048                 type_t *type = skip_typeref(decl->type);
5049
5050                 if (!decl->address_taken && is_type_scalar(type))
5051                         ++count;
5052                 const initializer_t *initializer = decl->init.initializer;
5053                 /* FIXME: should walk initializer hierarchies... */
5054                 if (initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
5055                         count += count_decls_in_expression(initializer->value.value);
5056                 }
5057         }
5058         return count;
5059 }
5060
5061 static int count_decls_in_expression(const expression_t *expression) {
5062         int count = 0;
5063
5064         if (expression == NULL)
5065                 return 0;
5066
5067         switch((expression_kind_t) expression->base.kind) {
5068         case EXPR_STATEMENT:
5069                 return count_decls_in_stmts(expression->statement.statement);
5070         EXPR_BINARY_CASES {
5071                 int count_left  = count_decls_in_expression(expression->binary.left);
5072                 int count_right = count_decls_in_expression(expression->binary.right);
5073                 return count_left + count_right;
5074         }
5075         EXPR_UNARY_CASES
5076                 return count_decls_in_expression(expression->unary.value);
5077         case EXPR_CALL: {
5078                 call_argument_t *argument = expression->call.arguments;
5079                 for( ; argument != NULL; argument = argument->next) {
5080                         count += count_decls_in_expression(argument->expression);
5081                 }
5082                 return count;
5083         }
5084
5085         case EXPR_UNKNOWN:
5086         case EXPR_INVALID:
5087                 panic("unexpected expression kind");
5088
5089         case EXPR_COMPOUND_LITERAL:
5090                 /* TODO... */
5091                 break;
5092
5093         case EXPR_CONDITIONAL:
5094                 count += count_decls_in_expression(expression->conditional.condition);
5095                 count += count_decls_in_expression(expression->conditional.true_expression);
5096                 count += count_decls_in_expression(expression->conditional.false_expression);
5097                 return count;
5098
5099         case EXPR_BUILTIN_PREFETCH:
5100                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
5101                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
5102                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
5103                 return count;
5104
5105         case EXPR_BUILTIN_CONSTANT_P:
5106                 count += count_decls_in_expression(expression->builtin_constant.value);
5107                 return count;
5108
5109         case EXPR_SELECT:
5110                 count += count_decls_in_expression(expression->select.compound);
5111                 return count;
5112
5113         case EXPR_ARRAY_ACCESS:
5114                 count += count_decls_in_expression(expression->array_access.array_ref);
5115                 count += count_decls_in_expression(expression->array_access.index);
5116                 return count;
5117
5118         case EXPR_CLASSIFY_TYPE:
5119                 count += count_decls_in_expression(expression->classify_type.type_expression);
5120                 return count;
5121
5122         case EXPR_SIZEOF:
5123         case EXPR_ALIGNOF: {
5124                 expression_t *tp_expression = expression->typeprop.tp_expression;
5125                 if (tp_expression != NULL) {
5126                         count += count_decls_in_expression(tp_expression);
5127                 }
5128                 return count;
5129         }
5130
5131         case EXPR_OFFSETOF:
5132         case EXPR_REFERENCE:
5133         case EXPR_CONST:
5134         case EXPR_CHARACTER_CONSTANT:
5135         case EXPR_WIDE_CHARACTER_CONSTANT:
5136         case EXPR_STRING_LITERAL:
5137         case EXPR_WIDE_STRING_LITERAL:
5138         case EXPR_FUNCNAME:
5139         case EXPR_BUILTIN_SYMBOL:
5140         case EXPR_VA_START:
5141         case EXPR_VA_ARG:
5142         case EXPR_LABEL_ADDRESS:
5143                 break;
5144         }
5145
5146         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
5147          * (or implement all the missing expressions here/implement a walker)
5148          */
5149
5150         return 0;
5151 }
5152
5153 static int count_decls_in_stmts(const statement_t *stmt)
5154 {
5155         int count = 0;
5156         for (; stmt != NULL; stmt = stmt->base.next) {
5157                 switch (stmt->kind) {
5158                         case STATEMENT_EMPTY:
5159                                 break;
5160
5161                         case STATEMENT_DECLARATION: {
5162                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5163                                 count += count_local_declarations(decl_stmt->declarations_begin,
5164                                                                   decl_stmt->declarations_end->next);
5165                                 break;
5166                         }
5167
5168                         case STATEMENT_COMPOUND: {
5169                                 const compound_statement_t *const comp =
5170                                         &stmt->compound;
5171                                 count += count_decls_in_stmts(comp->statements);
5172                                 break;
5173                         }
5174
5175                         case STATEMENT_IF: {
5176                                 const if_statement_t *const if_stmt = &stmt->ifs;
5177                                 count += count_decls_in_expression(if_stmt->condition);
5178                                 count += count_decls_in_stmts(if_stmt->true_statement);
5179                                 count += count_decls_in_stmts(if_stmt->false_statement);
5180                                 break;
5181                         }
5182
5183                         case STATEMENT_SWITCH: {
5184                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
5185                                 count += count_decls_in_expression(switch_stmt->expression);
5186                                 count += count_decls_in_stmts(switch_stmt->body);
5187                                 break;
5188                         }
5189
5190                         case STATEMENT_LABEL: {
5191                                 const label_statement_t *const label_stmt = &stmt->label;
5192                                 if (label_stmt->statement != NULL) {
5193                                         count += count_decls_in_stmts(label_stmt->statement);
5194                                 }
5195                                 break;
5196                         }
5197
5198                         case STATEMENT_WHILE: {
5199                                 const while_statement_t *const while_stmt = &stmt->whiles;
5200                                 count += count_decls_in_expression(while_stmt->condition);
5201                                 count += count_decls_in_stmts(while_stmt->body);
5202                                 break;
5203                         }
5204
5205                         case STATEMENT_DO_WHILE: {
5206                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
5207                                 count += count_decls_in_expression(do_while_stmt->condition);
5208                                 count += count_decls_in_stmts(do_while_stmt->body);
5209                                 break;
5210                         }
5211
5212                         case STATEMENT_FOR: {
5213                                 const for_statement_t *const for_stmt = &stmt->fors;
5214                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
5215                                 count += count_decls_in_expression(for_stmt->initialisation);
5216                                 count += count_decls_in_expression(for_stmt->condition);
5217                                 count += count_decls_in_expression(for_stmt->step);
5218                                 count += count_decls_in_stmts(for_stmt->body);
5219                                 break;
5220                         }
5221
5222                         case STATEMENT_CASE_LABEL: {
5223                                 const case_label_statement_t *label = &stmt->case_label;
5224                                 count += count_decls_in_expression(label->expression);
5225                                 if (label->statement != NULL) {
5226                                         count += count_decls_in_stmts(label->statement);
5227                                 }
5228                                 break;
5229                         }
5230
5231                         case STATEMENT_ASM:
5232                         case STATEMENT_BREAK:
5233                         case STATEMENT_CONTINUE:
5234                                 break;
5235
5236                         case STATEMENT_EXPRESSION: {
5237                                 const expression_statement_t *expr_stmt = &stmt->expression;
5238                                 count += count_decls_in_expression(expr_stmt->expression);
5239                                 break;
5240                         }
5241
5242                         case STATEMENT_GOTO:
5243                         case STATEMENT_LEAVE:
5244                         case STATEMENT_INVALID:
5245                                 break;
5246
5247                         case STATEMENT_RETURN: {
5248                                 const return_statement_t *ret_stmt = &stmt->returns;
5249                                 count += count_decls_in_expression(ret_stmt->value);
5250                                 break;
5251                         }
5252
5253                         case STATEMENT_MS_TRY: {
5254                                 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
5255                                 count += count_decls_in_stmts(try_stmt->try_statement);
5256                                 if (try_stmt->except_expression != NULL)
5257                                         count += count_decls_in_expression(try_stmt->except_expression);
5258                                 count += count_decls_in_stmts(try_stmt->final_statement);
5259                                 break;
5260                         }
5261                 }
5262         }
5263         return count;
5264 }
5265
5266 static int get_function_n_local_vars(declaration_t *declaration)
5267 {
5268         int count = 0;
5269
5270         /* count parameters */
5271         count += count_local_declarations(declaration->scope.declarations, NULL);
5272
5273         /* count local variables declared in body */
5274         count += count_decls_in_stmts(declaration->init.statement);
5275
5276         return count;
5277 }
5278
5279 static void initialize_function_parameters(declaration_t *declaration)
5280 {
5281         ir_graph        *irg             = current_ir_graph;
5282         ir_node         *args            = get_irg_args(irg);
5283         ir_node         *start_block     = get_irg_start_block(irg);
5284         ir_type         *function_irtype = get_ir_type(declaration->type);
5285
5286         int            n         = 0;
5287         declaration_t *parameter = declaration->scope.declarations;
5288         for( ; parameter != NULL; parameter = parameter->next, ++n) {
5289                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
5290                 type_t *type = skip_typeref(parameter->type);
5291
5292                 bool needs_entity = parameter->address_taken;
5293                 assert(!is_type_array(type));
5294                 if (is_type_compound(type)) {
5295                         needs_entity = true;
5296                 }
5297
5298                 if (needs_entity) {
5299                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5300                         ident     *id     = new_id_from_str(parameter->symbol->string);
5301                         set_entity_ident(entity, id);
5302
5303                         parameter->declaration_kind
5304                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5305                         parameter->v.entity = entity;
5306                         continue;
5307                 }
5308
5309                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5310                 ir_mode *param_mode   = get_type_mode(param_irtype);
5311
5312                 long     pn    = n;
5313                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5314
5315                 ir_mode *mode = get_ir_mode(type);
5316                 value = create_conv(NULL, value, mode);
5317                 value = do_strict_conv(NULL, value);
5318
5319                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
5320                 parameter->v.value_number   = next_value_number_function;
5321                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
5322                 ++next_value_number_function;
5323
5324                 set_value(parameter->v.value_number, value);
5325         }
5326 }
5327
5328 /**
5329  * Handle additional decl modifiers for IR-graphs
5330  *
5331  * @param irg            the IR-graph
5332  * @param dec_modifiers  additional modifiers
5333  */
5334 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5335 {
5336         if (decl_modifiers & DM_NORETURN) {
5337                 /* TRUE if the declaration includes the Microsoft
5338                    __declspec(noreturn) specifier. */
5339                 set_irg_additional_property(irg, mtp_property_noreturn);
5340         }
5341         if (decl_modifiers & DM_NOTHROW) {
5342                 /* TRUE if the declaration includes the Microsoft
5343                    __declspec(nothrow) specifier. */
5344                 set_irg_additional_property(irg, mtp_property_nothrow);
5345         }
5346         if (decl_modifiers & DM_NAKED) {
5347                 /* TRUE if the declaration includes the Microsoft
5348                    __declspec(naked) specifier. */
5349                 set_irg_additional_property(irg, mtp_property_naked);
5350         }
5351         if (decl_modifiers & DM_FORCEINLINE) {
5352                 /* TRUE if the declaration includes the
5353                    Microsoft __forceinline specifier. */
5354                 set_irg_inline_property(irg, irg_inline_forced);
5355         }
5356         if (decl_modifiers & DM_NOINLINE) {
5357                 /* TRUE if the declaration includes the Microsoft
5358                    __declspec(noinline) specifier. */
5359                 set_irg_inline_property(irg, irg_inline_forbidden);
5360         }
5361 }
5362
5363 static void add_function_pointer(ir_type *segment, ir_entity *method,
5364                                  const char *unique_template)
5365 {
5366         ir_type   *method_type  = get_entity_type(method);
5367         ident     *id           = id_unique(unique_template);
5368         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5369
5370         ident     *ide          = id_unique(unique_template);
5371         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5372         ir_graph  *irg          = get_const_code_irg();
5373         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5374                                                            method, NULL);
5375
5376         set_entity_compiler_generated(ptr, 1);
5377         set_entity_variability(ptr, variability_constant);
5378         set_atomic_ent_value(ptr, val);
5379 }
5380
5381 /**
5382  * Generate possible IJmp branches to a given label block.
5383  */
5384 static void gen_ijmp_branches(ir_node *block) {
5385         ir_node *ijmp;
5386         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5387                 add_immBlock_pred(block, ijmp);
5388         }
5389 }
5390
5391 /**
5392  * Create code for a function.
5393  */
5394 static void create_function(declaration_t *declaration)
5395 {
5396         ir_entity *function_entity = get_function_entity(declaration);
5397
5398         if (declaration->init.statement == NULL)
5399                 return;
5400
5401         if (declaration->modifiers & DM_CONSTRUCTOR) {
5402                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5403                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5404         }
5405         if (declaration->modifiers & DM_DESTRUCTOR) {
5406                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5407                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5408         }
5409
5410         current_function_decl = declaration;
5411         current_function_name = NULL;
5412         current_funcsig       = NULL;
5413
5414         assert(all_labels == NULL);
5415         all_labels = NEW_ARR_F(declaration_t *, 0);
5416         ijmp_list  = NULL;
5417
5418         int       n_local_vars = get_function_n_local_vars(declaration);
5419         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5420
5421         ir_graph *old_current_function = current_function;
5422         current_function = irg;
5423
5424         set_irg_fp_model(irg, firm_opt.fp_model);
5425         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5426         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5427
5428         ir_node *first_block = get_cur_block();
5429
5430         /* set inline flags */
5431         if (declaration->is_inline)
5432                 set_irg_inline_property(irg, irg_inline_recomended);
5433         handle_decl_modifier_irg(irg, declaration->modifiers);
5434
5435         next_value_number_function = 0;
5436         initialize_function_parameters(declaration);
5437
5438         statement_to_firm(declaration->init.statement);
5439
5440         ir_node *end_block = get_irg_end_block(irg);
5441
5442         /* do we have a return statement yet? */
5443         if (get_cur_block() != NULL) {
5444                 type_t *type = skip_typeref(declaration->type);
5445                 assert(is_type_function(type));
5446                 const function_type_t *func_type   = &type->function;
5447                 const type_t          *return_type
5448                         = skip_typeref(func_type->return_type);
5449
5450                 ir_node *ret;
5451                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5452                         ret = new_Return(get_store(), 0, NULL);
5453                 } else {
5454                         ir_mode *mode;
5455                         if (is_type_scalar(return_type)) {
5456                                 mode = get_ir_mode(func_type->return_type);
5457                         } else {
5458                                 mode = mode_P_data;
5459                         }
5460
5461                         ir_node *in[1];
5462                         /* §5.1.2.2.3 main implicitly returns 0 */
5463                         if (strcmp(declaration->symbol->string, "main") == 0) {
5464                                 in[0] = new_Const(mode, get_mode_null(mode));
5465                         } else {
5466                                 in[0] = new_Unknown(mode);
5467                         }
5468                         ret = new_Return(get_store(), 1, in);
5469                 }
5470                 add_immBlock_pred(end_block, ret);
5471         }
5472
5473         bool has_computed_gotos = false;
5474         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5475                 declaration_t *label = all_labels[i];
5476                 if (label->address_taken) {
5477                         gen_ijmp_branches(label->v.block);
5478                         has_computed_gotos = true;
5479                 }
5480                 mature_immBlock(label->v.block);
5481         }
5482         if (has_computed_gotos) {
5483                 /* if we have computed goto's in the function, we cannot inline it */
5484                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5485                         warningf(&declaration->source_position,
5486                                 "function '%Y' can never be inlined because it contains a computed goto",
5487                                 declaration->symbol);
5488                 }
5489                 set_irg_inline_property(irg, irg_inline_forbidden);
5490         }
5491
5492         DEL_ARR_F(all_labels);
5493         all_labels = NULL;
5494
5495         mature_immBlock(first_block);
5496         mature_immBlock(end_block);
5497
5498         irg_finalize_cons(irg);
5499
5500         /* finalize the frame type */
5501         ir_type *frame_type = get_irg_frame_type(irg);
5502         int      n          = get_compound_n_members(frame_type);
5503         int      align_all  = 4;
5504         int      offset     = 0;
5505         for(int i = 0; i < n; ++i) {
5506                 ir_entity *entity      = get_compound_member(frame_type, i);
5507                 ir_type   *entity_type = get_entity_type(entity);
5508
5509                 int align = get_type_alignment_bytes(entity_type);
5510                 if (align > align_all)
5511                         align_all = align;
5512                 int misalign = 0;
5513                 if (align > 0) {
5514                         misalign  = offset % align;
5515                         if (misalign > 0) {
5516                                 offset += align - misalign;
5517                         }
5518                 }
5519
5520                 set_entity_offset(entity, offset);
5521                 offset += get_type_size_bytes(entity_type);
5522         }
5523         set_type_size_bytes(frame_type, offset);
5524         set_type_alignment_bytes(frame_type, align_all);
5525
5526         irg_vrfy(irg);
5527         current_function = old_current_function;
5528 }
5529
5530 static void scope_to_firm(scope_t *scope)
5531 {
5532         /* first pass: create declarations */
5533         declaration_t *declaration = scope->declarations;
5534         for( ; declaration != NULL; declaration = declaration->next) {
5535                 if (declaration->namespc != NAMESPACE_NORMAL)
5536                         continue;
5537                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5538                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5539                         continue;
5540                 if (declaration->symbol == NULL)
5541                         continue;
5542
5543                 type_t *type = skip_typeref(declaration->type);
5544                 if (is_type_function(type)) {
5545                         get_function_entity(declaration);
5546                 } else {
5547                         create_global_variable(declaration);
5548                 }
5549         }
5550
5551         /* second pass: create code/initializers */
5552         declaration = scope->declarations;
5553         for( ; declaration != NULL; declaration = declaration->next) {
5554                 if (declaration->namespc != NAMESPACE_NORMAL)
5555                         continue;
5556                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5557                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5558                         continue;
5559                 if (declaration->symbol == NULL)
5560                         continue;
5561
5562                 type_t *type = declaration->type;
5563                 if (type->kind == TYPE_FUNCTION) {
5564                         create_function(declaration);
5565                         declaration_t *inner;
5566                         for (inner = next_inner_function(); inner != NULL;
5567                              inner = next_inner_function())
5568                                  create_function(inner);
5569                 } else {
5570                         assert(declaration->declaration_kind
5571                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5572                         current_ir_graph = get_const_code_irg();
5573                         create_declaration_initializer(declaration);
5574                 }
5575         }
5576 }
5577
5578 static void set_be_option(const char *option)
5579 {
5580         int res = firm_be_option(option);
5581         assert(res);
5582 }
5583
5584 void init_ast2firm(void)
5585 {
5586         obstack_init(&asm_obst);
5587         init_atomic_modes();
5588
5589         id_underscore = new_id_from_chars("_", 1);
5590         id_imp        = new_id_from_chars("__imp_", 6);
5591
5592         /* OS option must be set to the backend */
5593         switch (firm_opt.os_support) {
5594         case OS_SUPPORT_MINGW:
5595                 create_ld_ident = create_ld_ident_win32;
5596                 set_be_option("ia32-gasmode=mingw");
5597                 break;
5598         case OS_SUPPORT_LINUX:
5599                 create_ld_ident = create_ld_ident_linux_elf;
5600                 set_be_option("ia32-gasmode=elf");
5601                 break;
5602         case OS_SUPPORT_MACHO:
5603                 create_ld_ident = create_ld_ident_macho;
5604                 set_be_option("ia32-gasmode=macho");
5605                 set_be_option("ia32-stackalign=4");
5606                 set_be_option("pic");
5607                 break;
5608         }
5609
5610         /* create idents for all known runtime functions */
5611         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5612                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5613         }
5614
5615         entitymap_init(&entitymap);
5616 }
5617
5618 static void init_ir_types(void)
5619 {
5620         static int ir_types_initialized = 0;
5621         if (ir_types_initialized)
5622                 return;
5623         ir_types_initialized = 1;
5624
5625         ir_type_int        = get_ir_type(type_int);
5626         ir_type_const_char = get_ir_type(type_const_char);
5627         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5628         ir_type_void       = get_ir_type(type_void);
5629 }
5630
5631 void exit_ast2firm(void)
5632 {
5633         entitymap_destroy(&entitymap);
5634         obstack_free(&asm_obst, NULL);
5635 }
5636
5637 static void global_asm_to_firm(statement_t *s)
5638 {
5639         for (; s != NULL; s = s->base.next) {
5640                 assert(s->kind == STATEMENT_ASM);
5641
5642                 char const *const text = s->asms.asm_text.begin;
5643                 size_t            size = s->asms.asm_text.size;
5644
5645                 /* skip the last \0 */
5646                 if (text[size - 1] == '\0')
5647                         --size;
5648
5649                 ident *const id = new_id_from_chars(text, size);
5650                 add_irp_asm(id);
5651         }
5652 }
5653
5654 void translation_unit_to_firm(translation_unit_t *unit)
5655 {
5656         /* just to be sure */
5657         continue_label      = NULL;
5658         break_label         = NULL;
5659         current_switch_cond = NULL;
5660
5661         init_ir_types();
5662
5663         scope_to_firm(&unit->scope);
5664         global_asm_to_firm(unit->global_asm);
5665
5666         current_ir_graph = NULL;
5667 }