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/adt/bitfiddle.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "symbol_t.h"
  36 #include "token_t.h"
  37 #include "type_t.h"
  38 #include "ast_t.h"
  39 #include "parser.h"
  40 #include "diagnostic.h"
  41 #include "lang_features.h"
  42 #include "types.h"
  43 #include "warning.h"
  44 #include "entitymap_t.h"
  45 #include "driver/firm_opt.h"
  46 #include "driver/firm_cmdline.h"
  47
  48 /* some idents needed for name mangling */
  49 static ident *id_underscore;
  50 static ident *id_imp;
  51
  52 static ir_type *ir_type_const_char;
  53 static ir_type *ir_type_wchar_t;
  54 static ir_type *ir_type_void;
  55 static ir_type *ir_type_int;
  56
  57 static int             next_value_number_function;
  58 static ir_node        *continue_label;
  59 static ir_node        *break_label;
  60 static ir_node        *current_switch_cond;
  61 static bool            saw_default_label;
  62 static declaration_t **all_labels;
  63 static declaration_t **inner_functions;
  64 static int             inner_function_idx;
  65 static ir_node        *ijmp_list;
  66 static bool            constant_folding;
  67
  68 extern bool            have_const_functions;
  69
  70 static const declaration_t *current_function_decl;
  71 static ir_node             *current_function_name;
  72 static ir_node             *current_funcsig;
  73 static switch_statement_t  *current_switch;
  74 static ir_graph            *current_function;
  75
  76 static entitymap_t  entitymap;
  77
  78 static struct obstack asm_obst;
  79
  80 typedef enum declaration_kind_t {
  81         DECLARATION_KIND_UNKNOWN,
  82         DECLARATION_KIND_FUNCTION,
  83         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  84         DECLARATION_KIND_GLOBAL_VARIABLE,
  85         DECLARATION_KIND_LOCAL_VARIABLE,
  86         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  87         DECLARATION_KIND_COMPOUND_MEMBER,
  88         DECLARATION_KIND_LABEL_BLOCK,
  89         DECLARATION_KIND_ENUM_ENTRY,
  90         DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE,
  91         DECLARATION_KIND_COMPOUND_TYPE_COMPLETE,
  92         DECLARATION_KIND_TYPE,
  93         DECLARATION_KIND_INNER_FUNCTION
  94 } declaration_kind_t;
  95
  96 static ir_type *get_ir_type(type_t *type);
  97 static ir_type *get_ir_type_incomplete(type_t *type);
  98 static int count_decls_in_stmts(const statement_t *stmt);
  99
 100 static void enqueue_inner_function(declaration_t *declaration) {
 101         if (inner_functions == NULL) {
 102                 inner_functions = NEW_ARR_F(declaration_t *, 16);
 103                 inner_functions[0] = declaration;
 104                 inner_function_idx = 1;
 105         } else {
 106                 int size = ARR_LEN(inner_functions);
 107                 if (inner_function_idx >= size) {
 108                         ARR_RESIZE(declaration_t *, inner_functions, size + 16);
 109                 }
 110                 inner_functions[inner_function_idx++] = declaration;
 111         }
 112 }
 113
 114 static declaration_t *next_inner_function(void) {
 115         if (inner_function_idx == 0)
 116                 return 0;
 117         return inner_functions[--inner_function_idx];
 118 }
 119
 120 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 121 {
 122         const declaration_t *declaration = get_irg_loc_description(irg, pos);
 123
 124         if (declaration != NULL) {
 125                 warningf(&declaration->source_position,
 126                          "variable '%#T' might be used uninitialized",
 127                          declaration->type, declaration->symbol);
 128         }
 129         return new_r_Unknown(irg, mode);
 130 }
 131
 132 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 133 {
 134         const source_position_t *pos = (const source_position_t*) dbg;
 135         if (pos == NULL)
 136                 return 0;
 137         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 138                                    pos->linenr);
 139 }
 140
 141 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 142 {
 143         const source_position_t *pos = (const source_position_t*) dbg;
 144         if (pos == NULL)
 145                 return NULL;
 146         if (line != NULL)
 147                 *line = pos->linenr;
 148         return pos->input_name;
 149 }
 150
 151 static dbg_info *get_dbg_info(const source_position_t *pos)
 152 {
 153         return (dbg_info*) pos;
 154 }
 155
 156 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 157
 158 static ir_mode *mode_int, *mode_uint;
 159
 160 static ir_node *_expression_to_firm(const expression_t *expression);
 161 static ir_node *expression_to_firm(const expression_t *expression);
 162 static inline ir_mode *get_ir_mode(type_t *type);
 163 static void create_local_declaration(declaration_t *declaration);
 164
 165 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 166 {
 167         unsigned flags = get_atomic_type_flags(kind);
 168         unsigned size  = get_atomic_type_size(kind);
 169         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 170                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 171                 char            name[64];
 172                 ir_mode_sort    sort;
 173                 unsigned        bit_size     = size * 8;
 174                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 175                 ir_mode_arithmetic arithmetic;
 176                 unsigned        modulo_shift;
 177
 178                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 179                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 180                         snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
 181                         sort         = irms_int_number;
 182                         arithmetic   = irma_twos_complement;
 183                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 184                 } else {
 185                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 186                         snprintf(name, sizeof(name), "f%d", bit_size);
 187                         sort         = irms_float_number;
 188                         arithmetic   = irma_ieee754;
 189                         modulo_shift = 0;
 190                 }
 191                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 192                                    modulo_shift);
 193         }
 194
 195         return NULL;
 196 }
 197
 198 /**
 199  * Initialises the atomic modes depending on the machine size.
 200  */
 201 static void init_atomic_modes(void)
 202 {
 203         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 204                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 205         }
 206         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 207         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 208
 209         /* there's no real void type in firm */
 210         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 211
 212         /* initialize pointer modes */
 213         char            name[64];
 214         ir_mode_sort    sort         = irms_reference;
 215         unsigned        bit_size     = machine_size;
 216         bool            is_signed    = 0;
 217         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 218         unsigned        modulo_shift
 219                 = bit_size < machine_size ? machine_size : bit_size;
 220
 221         snprintf(name, sizeof(name), "p%d", machine_size);
 222         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 223                                         modulo_shift);
 224
 225         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 226         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 227
 228         /* Hmm, pointers should be machine size */
 229         set_modeP_data(ptr_mode);
 230         set_modeP_code(ptr_mode);
 231 }
 232
 233 static unsigned get_compound_type_size(compound_type_t *type)
 234 {
 235         ir_type *irtype = get_ir_type((type_t*) type);
 236         return get_type_size_bytes(irtype);
 237 }
 238
 239 static unsigned get_array_type_size(array_type_t *type)
 240 {
 241         assert(!type->is_vla);
 242         ir_type *irtype = get_ir_type((type_t*) type);
 243         return get_type_size_bytes(irtype);
 244 }
 245
 246
 247 static unsigned get_type_size_const(type_t *type)
 248 {
 249         switch(type->kind) {
 250         case TYPE_ERROR:
 251                 panic("error type occurred");
 252         case TYPE_ATOMIC:
 253                 return get_atomic_type_size(type->atomic.akind);
 254         case TYPE_COMPLEX:
 255                 return 2 * get_atomic_type_size(type->complex.akind);
 256         case TYPE_IMAGINARY:
 257                 return get_atomic_type_size(type->imaginary.akind);
 258         case TYPE_ENUM:
 259                 return get_mode_size_bytes(mode_int);
 260         case TYPE_COMPOUND_UNION:
 261         case TYPE_COMPOUND_STRUCT:
 262                 return get_compound_type_size(&type->compound);
 263         case TYPE_FUNCTION:
 264                 /* just a pointer to the function */
 265                 return get_mode_size_bytes(mode_P_code);
 266         case TYPE_POINTER:
 267                 return get_mode_size_bytes(mode_P_data);
 268         case TYPE_ARRAY:
 269                 return get_array_type_size(&type->array);
 270         case TYPE_BUILTIN:
 271                 return get_type_size_const(type->builtin.real_type);
 272         case TYPE_BITFIELD:
 273                 panic("type size of bitfield request");
 274         case TYPE_TYPEDEF:
 275         case TYPE_TYPEOF:
 276         case TYPE_INVALID:
 277                 break;
 278         }
 279         panic("Trying to determine size of invalid type");
 280 }
 281
 282 static ir_node *get_type_size(type_t *type)
 283 {
 284         type = skip_typeref(type);
 285
 286         if (is_type_array(type) && type->array.is_vla) {
 287                 ir_node *size_node = type->array.size_node;
 288                 if (size_node == NULL) {
 289                         size_node = expression_to_firm(type->array.size_expression);
 290                         assert(!is_Const(size_node));
 291                         type->array.size_node = size_node;
 292                 }
 293
 294                 ir_node *elem_size = get_type_size(type->array.element_type);
 295                 ir_mode *mode      = get_irn_mode(size_node);
 296                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 297                 return real_size;
 298         }
 299
 300         ir_mode *mode = get_ir_mode(type_size_t);
 301         symconst_symbol sym;
 302         sym.type_p = get_ir_type(type);
 303         return new_SymConst(mode, sym, symconst_type_size);
 304 }
 305
 306 static unsigned count_parameters(const function_type_t *function_type)
 307 {
 308         unsigned count = 0;
 309
 310         function_parameter_t *parameter = function_type->parameters;
 311         for ( ; parameter != NULL; parameter = parameter->next) {
 312                 ++count;
 313         }
 314
 315         return count;
 316 }
 317
 318 /**
 319  * Creates a Firm type for an atomic type
 320  */
 321 static ir_type *create_atomic_type(const atomic_type_t *type)
 322 {
 323         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 324         atomic_type_kind_t  kind      = type->akind;
 325         ir_mode            *mode      = _atomic_modes[kind];
 326         ident              *id        = get_mode_ident(mode);
 327         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 328
 329         set_type_alignment_bytes(irtype, type->base.alignment);
 330
 331         return irtype;
 332 }
 333
 334 /**
 335  * Creates a Firm type for a complex type
 336  */
 337 static ir_type *create_complex_type(const complex_type_t *type)
 338 {
 339         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 340         atomic_type_kind_t  kind      = type->akind;
 341         ir_mode            *mode      = _atomic_modes[kind];
 342         ident              *id        = get_mode_ident(mode);
 343
 344         (void) id;
 345         (void) dbgi;
 346
 347         /* FIXME: finish the array */
 348         return NULL;
 349 }
 350
 351 /**
 352  * Creates a Firm type for an imaginary type
 353  */
 354 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 355 {
 356         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 357         atomic_type_kind_t  kind      = type->akind;
 358         ir_mode            *mode      = _atomic_modes[kind];
 359         ident              *id        = get_mode_ident(mode);
 360         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 361
 362         set_type_alignment_bytes(irtype, type->base.alignment);
 363
 364         return irtype;
 365 }
 366
 367 /**
 368  * return type of a parameter (and take transparent union gnu extension into
 369  * account)
 370  */
 371 static type_t *get_parameter_type(type_t *type)
 372 {
 373         type = skip_typeref(type);
 374         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 375                 declaration_t *decl = type->compound.declaration;
 376                 type                = decl->scope.declarations->type;
 377         }
 378
 379         return type;
 380 }
 381
 382 static ir_type *create_method_type(const function_type_t *function_type)
 383 {
 384         type_t  *return_type  = function_type->return_type;
 385
 386         ident   *id           = id_unique("functiontype.%u");
 387         int      n_parameters = count_parameters(function_type);
 388         int      n_results    = return_type == type_void ? 0 : 1;
 389         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 390         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 391
 392         if (return_type != type_void) {
 393                 ir_type *restype = get_ir_type(return_type);
 394                 set_method_res_type(irtype, 0, restype);
 395         }
 396
 397         function_parameter_t *parameter = function_type->parameters;
 398         int                   n         = 0;
 399         for ( ; parameter != NULL; parameter = parameter->next) {
 400                 type_t  *type     = get_parameter_type(parameter->type);
 401                 ir_type *p_irtype = get_ir_type(type);
 402                 set_method_param_type(irtype, n, p_irtype);
 403                 ++n;
 404         }
 405
 406         if (function_type->variadic || function_type->unspecified_parameters) {
 407                 set_method_variadicity(irtype, variadicity_variadic);
 408         }
 409
 410         unsigned cc = get_method_calling_convention(irtype);
 411         switch (function_type->calling_convention) {
 412         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 413         case CC_CDECL:
 414 is_cdecl:
 415                 set_method_calling_convention(irtype, SET_CDECL(cc));
 416                 break;
 417
 418         case CC_STDCALL:
 419                 if (function_type->variadic || function_type->unspecified_parameters)
 420                         goto is_cdecl;
 421
 422                 /* only non-variadic function can use stdcall, else use cdecl */
 423                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 424                 break;
 425
 426         case CC_FASTCALL:
 427                 if (function_type->variadic || function_type->unspecified_parameters)
 428                         goto is_cdecl;
 429                 /* only non-variadic function can use fastcall, else use cdecl */
 430                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 431                 break;
 432
 433         case CC_THISCALL:
 434                 /* Hmm, leave default, not accepted by the parser yet. */
 435                 warningf(&function_type->base.source_position, "THISCALL calling convention not supported yet");
 436                 break;
 437         }
 438         return irtype;
 439 }
 440
 441 static ir_type *create_pointer_type(pointer_type_t *type)
 442 {
 443         type_t   *points_to    = type->points_to;
 444         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 445         dbg_info *dbgi         = get_dbg_info(&type->base.source_position);
 446         ir_type  *ir_type      = new_d_type_pointer(id_unique("pointer.%u"),
 447                                                     ir_points_to, mode_P_data, dbgi);
 448
 449         return ir_type;
 450 }
 451
 452 static ir_type *create_array_type(array_type_t *type)
 453 {
 454         type_t  *element_type    = type->element_type;
 455         ir_type *ir_element_type = get_ir_type(element_type);
 456
 457         ident    *id      = id_unique("array.%u");
 458         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 459         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 460
 461         const int align = get_type_alignment_bytes(ir_element_type);
 462         set_type_alignment_bytes(ir_type, align);
 463
 464         if (type->size_constant) {
 465                 int n_elements = type->size;
 466
 467                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 468
 469                 size_t elemsize = get_type_size_bytes(ir_element_type);
 470                 if (elemsize % align > 0) {
 471                         elemsize += align - (elemsize % align);
 472                 }
 473                 set_type_size_bytes(ir_type, n_elements * elemsize);
 474         } else {
 475                 set_array_lower_bound_int(ir_type, 0, 0);
 476         }
 477         set_type_state(ir_type, layout_fixed);
 478
 479         return ir_type;
 480 }
 481
 482 /**
 483  * Return the signed integer type of size bits.
 484  *
 485  * @param size   the size
 486  */
 487 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 488                                                  unsigned size)
 489 {
 490         static ir_mode *s_modes[64 + 1] = {NULL, };
 491         ir_type *res;
 492         ir_mode *mode;
 493
 494         if (size <= 0 || size > 64)
 495                 return NULL;
 496
 497         mode = s_modes[size];
 498         if (mode == NULL) {
 499                 char name[32];
 500
 501                 snprintf(name, sizeof(name), "bf_I%u", size);
 502                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 503                                    size <= 32 ? 32 : size );
 504                 s_modes[size] = mode;
 505         }
 506
 507         char name[32];
 508         snprintf(name, sizeof(name), "I%u", size);
 509         ident *id = new_id_from_str(name);
 510         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 511         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 512         set_primitive_base_type(res, base_tp);
 513
 514         return res;
 515 }
 516
 517 /**
 518  * Return the unsigned integer type of size bits.
 519  *
 520  * @param size   the size
 521  */
 522 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 523                                                    unsigned size)
 524 {
 525         static ir_mode *u_modes[64 + 1] = {NULL, };
 526         ir_type *res;
 527         ir_mode *mode;
 528
 529         if (size <= 0 || size > 64)
 530                 return NULL;
 531
 532         mode = u_modes[size];
 533         if (mode == NULL) {
 534                 char name[32];
 535
 536                 snprintf(name, sizeof(name), "bf_U%u", size);
 537                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 538                                    size <= 32 ? 32 : size );
 539                 u_modes[size] = mode;
 540         }
 541
 542         char name[32];
 543
 544         snprintf(name, sizeof(name), "U%u", size);
 545         ident *id = new_id_from_str(name);
 546         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 547         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 548         set_primitive_base_type(res, base_tp);
 549
 550         return res;
 551 }
 552
 553 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 554 {
 555         type_t *base = skip_typeref(type->base_type);
 556         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 557         ir_type *irbase = get_ir_type(base);
 558
 559         unsigned size = type->bit_size;
 560
 561         assert(!is_type_float(base));
 562         if (is_type_signed(base)) {
 563                 return get_signed_int_type_for_bit_size(irbase, size);
 564         } else {
 565                 return get_unsigned_int_type_for_bit_size(irbase, size);
 566         }
 567 }
 568
 569 #define INVALID_TYPE ((ir_type_ptr)-1)
 570
 571 enum {
 572         COMPOUND_IS_STRUCT = false,
 573         COMPOUND_IS_UNION  = true
 574 };
 575
 576 /**
 577  * Construct firm type from ast struct type.
 578  *
 579  * As anonymous inner structs get flattened to a single firm type, we might get
 580  * irtype, outer_offset and out_align passed (they represent the position of
 581  * the anonymous inner struct inside the resulting firm struct)
 582  */
 583 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 584                                      size_t *outer_offset, size_t *outer_align,
 585                                      bool incomplete, bool is_union)
 586 {
 587         declaration_t      *declaration = type->declaration;
 588         declaration_kind_t  kind        = (declaration_kind_t)declaration->declaration_kind;
 589
 590         if (kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
 591                         || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE
 592                                 && incomplete))
 593                 return declaration->v.irtype;
 594
 595         size_t align_all  = 1;
 596         size_t offset     = 0;
 597         size_t bit_offset = 0;
 598         size_t size       = 0;
 599
 600         if (irtype == NULL) {
 601                 symbol_t *symbol = declaration->symbol;
 602                 ident    *id;
 603                 if (symbol != NULL) {
 604                         id = new_id_from_str(symbol->string);
 605                 } else {
 606                         if (is_union) {
 607                                 id = id_unique("__anonymous_union.%u");
 608                         } else {
 609                                 id = id_unique("__anonymous_struct.%u");
 610                         }
 611                 }
 612                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 613
 614                 if (is_union) {
 615                         irtype = new_d_type_union(id, dbgi);
 616                 } else {
 617                         irtype = new_d_type_struct(id, dbgi);
 618                 }
 619
 620                 declaration->declaration_kind
 621                         = DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE;
 622                 declaration->v.irtype         = irtype;
 623                 //type->base.firm_type          = irtype;
 624         } else {
 625                 offset    = *outer_offset;
 626                 align_all = *outer_align;
 627         }
 628
 629         if (incomplete)
 630                 return irtype;
 631
 632         declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE;
 633
 634         declaration_t *entry = declaration->scope.declarations;
 635         for( ; entry != NULL; entry = entry->next) {
 636                 if (entry->namespc != NAMESPACE_NORMAL)
 637                         continue;
 638
 639                 size_t prev_offset = offset;
 640
 641                 symbol_t *symbol     = entry->symbol;
 642                 type_t   *entry_type = skip_typeref(entry->type);
 643                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 644
 645                 ident    *ident;
 646                 if (symbol != NULL) {
 647                         ident = new_id_from_str(symbol->string);
 648                 } else {
 649                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 650                                 create_compound_type(&entry_type->compound, irtype, &offset,
 651                                                      &align_all, false, COMPOUND_IS_STRUCT);
 652                                 goto finished_member;
 653                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 654                                 create_compound_type(&entry_type->compound, irtype, &offset,
 655                                                      &align_all, false, COMPOUND_IS_UNION);
 656                                 goto finished_member;
 657                         } else {
 658                                 assert(entry_type->kind == TYPE_BITFIELD);
 659                         }
 660                         ident = id_unique("anon.%u");
 661                 }
 662
 663                 ir_type *base_irtype;
 664                 if (entry_type->kind == TYPE_BITFIELD) {
 665                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 666                 } else {
 667                         base_irtype = get_ir_type(entry_type);
 668                 }
 669
 670                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 671                 size_t misalign        = offset % entry_alignment;
 672
 673                 ir_type   *entry_irtype = get_ir_type(entry_type);
 674                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 675
 676                 size_t base;
 677                 size_t bits_remainder;
 678                 if (entry_type->kind == TYPE_BITFIELD) {
 679                         size_t size_bits      = entry_type->bitfield.bit_size;
 680                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 681
 682                         if (size_bits > rest_size_bits) {
 683                                 /* start a new bucket */
 684                                 offset     += entry_alignment - misalign;
 685                                 bit_offset  = 0;
 686
 687                                 base           = offset;
 688                                 bits_remainder = 0;
 689                         } else {
 690                                 /* put into current bucket */
 691                                 base           = offset - misalign;
 692                                 bits_remainder = misalign * 8 + bit_offset;
 693                         }
 694
 695                         offset     += size_bits / 8;
 696                         bit_offset  = bit_offset + (size_bits % 8);
 697                 } else {
 698                         size_t entry_size = get_type_size_bytes(base_irtype);
 699                         if (misalign > 0 || bit_offset > 0)
 700                                 offset += entry_alignment - misalign;
 701
 702                         base           = offset;
 703                         bits_remainder = 0;
 704                         offset        += entry_size;
 705                         bit_offset     = 0;
 706                 }
 707
 708                 if (entry_alignment > align_all) {
 709                         if (entry_alignment % align_all != 0) {
 710                                 panic("uneven alignments not supported yet");
 711                         }
 712                         align_all = entry_alignment;
 713                 }
 714
 715                 set_entity_offset(entity, base);
 716                 set_entity_offset_bits_remainder(entity,
 717                                                  (unsigned char) bits_remainder);
 718                 //add_struct_member(irtype, entity);
 719                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 720                 assert(entry->v.entity == NULL);
 721                 entry->v.entity         = entity;
 722
 723 finished_member:
 724                 if (is_union) {
 725                         size_t entry_size = offset - prev_offset;
 726                         if (entry_size > size) {
 727                                 size = entry_size;
 728                         }
 729                         offset     = 0;
 730                         bit_offset = 0;
 731                 }
 732         }
 733
 734         if (!is_union) {
 735                 size = offset;
 736         }
 737
 738         size_t misalign = offset % align_all;
 739         if (misalign > 0 || bit_offset > 0) {
 740                 size += align_all - misalign;
 741         }
 742
 743         if (outer_offset != NULL) {
 744                 if (!is_union) {
 745                         *outer_offset = offset;
 746                 } else {
 747                         *outer_offset += size;
 748                 }
 749
 750                 if (align_all > *outer_align) {
 751                         if (align_all % *outer_align != 0) {
 752                                 panic("uneven alignments not supported yet");
 753                         }
 754                         *outer_align = align_all;
 755                 }
 756         } else {
 757                 set_type_alignment_bytes(irtype, align_all);
 758                 set_type_size_bytes(irtype, size);
 759                 set_type_state(irtype, layout_fixed);
 760         }
 761
 762         return irtype;
 763 }
 764
 765 static ir_type *create_enum_type(enum_type_t *const type)
 766 {
 767         type->base.firm_type = ir_type_int;
 768
 769         ir_mode *const mode    = mode_int;
 770         tarval  *const one     = get_mode_one(mode);
 771         tarval  *      tv_next = get_tarval_null(mode);
 772
 773         bool constant_folding_old = constant_folding;
 774         constant_folding = true;
 775
 776         declaration_t *declaration = type->declaration->next;
 777         for (; declaration != NULL; declaration = declaration->next) {
 778                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 779                         break;
 780
 781                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 782
 783                 expression_t *const init = declaration->init.enum_value;
 784                 if (init != NULL) {
 785                         ir_node *const cnst = expression_to_firm(init);
 786                         if (!is_Const(cnst)) {
 787                                 panic("couldn't fold constant");
 788                         }
 789                         tv_next = get_Const_tarval(cnst);
 790                 }
 791                 declaration->v.enum_val = tv_next;
 792                 tv_next = tarval_add(tv_next, one);
 793         }
 794
 795         constant_folding = constant_folding_old;
 796
 797         return ir_type_int;
 798 }
 799
 800 static ir_type *get_ir_type_incomplete(type_t *type)
 801 {
 802         assert(type != NULL);
 803         type = skip_typeref(type);
 804
 805         if (type->base.firm_type != NULL) {
 806                 assert(type->base.firm_type != INVALID_TYPE);
 807                 return type->base.firm_type;
 808         }
 809
 810         switch (type->kind) {
 811         case TYPE_COMPOUND_STRUCT:
 812                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 813                                             true, COMPOUND_IS_STRUCT);
 814         case TYPE_COMPOUND_UNION:
 815                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 816                                             true, COMPOUND_IS_UNION);
 817         default:
 818                 return get_ir_type(type);
 819         }
 820 }
 821
 822 static ir_type *get_ir_type(type_t *type)
 823 {
 824         assert(type != NULL);
 825
 826         type = skip_typeref(type);
 827
 828         if (type->base.firm_type != NULL) {
 829                 assert(type->base.firm_type != INVALID_TYPE);
 830                 return type->base.firm_type;
 831         }
 832
 833         ir_type *firm_type = NULL;
 834         switch (type->kind) {
 835         case TYPE_ERROR:
 836                 /* Happens while constant folding, when there was an error */
 837                 return create_atomic_type(&type_void->atomic);
 838
 839         case TYPE_ATOMIC:
 840                 firm_type = create_atomic_type(&type->atomic);
 841                 break;
 842         case TYPE_COMPLEX:
 843                 firm_type = create_complex_type(&type->complex);
 844                 break;
 845         case TYPE_IMAGINARY:
 846                 firm_type = create_imaginary_type(&type->imaginary);
 847                 break;
 848         case TYPE_FUNCTION:
 849                 firm_type = create_method_type(&type->function);
 850                 break;
 851         case TYPE_POINTER:
 852                 firm_type = create_pointer_type(&type->pointer);
 853                 break;
 854         case TYPE_ARRAY:
 855                 firm_type = create_array_type(&type->array);
 856                 break;
 857         case TYPE_COMPOUND_STRUCT:
 858                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 859                                                  false, COMPOUND_IS_STRUCT);
 860                 break;
 861         case TYPE_COMPOUND_UNION:
 862                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 863                                                  false, COMPOUND_IS_UNION);
 864                 break;
 865         case TYPE_ENUM:
 866                 firm_type = create_enum_type(&type->enumt);
 867                 break;
 868         case TYPE_BUILTIN:
 869                 firm_type = get_ir_type(type->builtin.real_type);
 870                 break;
 871         case TYPE_BITFIELD:
 872                 firm_type = create_bitfield_type(&type->bitfield);
 873                 break;
 874
 875         case TYPE_TYPEOF:
 876         case TYPE_TYPEDEF:
 877         case TYPE_INVALID:
 878                 break;
 879         }
 880         if (firm_type == NULL)
 881                 panic("unknown type found");
 882
 883         type->base.firm_type = firm_type;
 884         return firm_type;
 885 }
 886
 887 static inline ir_mode *get_ir_mode(type_t *type)
 888 {
 889         ir_type *irtype = get_ir_type(type);
 890
 891         /* firm doesn't report a mode for arrays somehow... */
 892         if (is_Array_type(irtype)) {
 893                 return mode_P_data;
 894         }
 895
 896         ir_mode *mode = get_type_mode(irtype);
 897         assert(mode != NULL);
 898         return mode;
 899 }
 900
 901 /** Names of the runtime functions. */
 902 static const struct {
 903         int        id;           /**< the rts id */
 904         int        n_res;        /**< number of return values */
 905         const char *name;        /**< the name of the rts function */
 906         int        n_params;     /**< number of parameters */
 907         unsigned   flags;        /**< language flags */
 908 } rts_data[] = {
 909         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 910         { rts_abort,      0, "abort",        0, _C89 },
 911         { rts_alloca,     1, "alloca",       1, _ALL },
 912         { rts_abs,        1, "abs",          1, _C89 },
 913         { rts_labs,       1, "labs",         1, _C89 },
 914         { rts_llabs,      1, "llabs",        1, _C99 },
 915         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 916
 917         { rts_fabs,       1, "fabs",         1, _C89 },
 918         { rts_sqrt,       1, "sqrt",         1, _C89 },
 919         { rts_cbrt,       1, "cbrt",         1, _C99 },
 920         { rts_exp,        1, "exp",          1, _C89 },
 921         { rts_exp2,       1, "exp2",         1, _C89 },
 922         { rts_exp10,      1, "exp10",        1, _GNUC },
 923         { rts_log,        1, "log",          1, _C89 },
 924         { rts_log2,       1, "log2",         1, _C89 },
 925         { rts_log10,      1, "log10",        1, _C89 },
 926         { rts_pow,        1, "pow",          2, _C89 },
 927         { rts_sin,        1, "sin",          1, _C89 },
 928         { rts_cos,        1, "cos",          1, _C89 },
 929         { rts_tan,        1, "tan",          1, _C89 },
 930         { rts_asin,       1, "asin",         1, _C89 },
 931         { rts_acos,       1, "acos",         1, _C89 },
 932         { rts_atan,       1, "atan",         1, _C89 },
 933         { rts_sinh,       1, "sinh",         1, _C89 },
 934         { rts_cosh,       1, "cosh",         1, _C89 },
 935         { rts_tanh,       1, "tanh",         1, _C89 },
 936
 937         { rts_fabsf,      1, "fabsf",        1, _C99 },
 938         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 939         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 940         { rts_expf,       1, "expf",         1, _C99 },
 941         { rts_exp2f,      1, "exp2f",        1, _C99 },
 942         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 943         { rts_logf,       1, "logf",         1, _C99 },
 944         { rts_log2f,      1, "log2f",        1, _C99 },
 945         { rts_log10f,     1, "log10f",       1, _C99 },
 946         { rts_powf,       1, "powf",         2, _C99 },
 947         { rts_sinf,       1, "sinf",         1, _C99 },
 948         { rts_cosf,       1, "cosf",         1, _C99 },
 949         { rts_tanf,       1, "tanf",         1, _C99 },
 950         { rts_asinf,      1, "asinf",        1, _C99 },
 951         { rts_acosf,      1, "acosf",        1, _C99 },
 952         { rts_atanf,      1, "atanf",        1, _C99 },
 953         { rts_sinhf,      1, "sinhf",        1, _C99 },
 954         { rts_coshf,      1, "coshf",        1, _C99 },
 955         { rts_tanhf,      1, "tanhf",        1, _C99 },
 956
 957         { rts_fabsl,      1, "fabsl",        1, _C99 },
 958         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 959         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 960         { rts_expl,       1, "expl",         1, _C99 },
 961         { rts_exp2l,      1, "exp2l",        1, _C99 },
 962         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 963         { rts_logl,       1, "logl",         1, _C99 },
 964         { rts_log2l,      1, "log2l",        1, _C99 },
 965         { rts_log10l,     1, "log10l",       1, _C99 },
 966         { rts_powl,       1, "powl",         2, _C99 },
 967         { rts_sinl,       1, "sinl",         1, _C99 },
 968         { rts_cosl,       1, "cosl",         1, _C99 },
 969         { rts_tanl,       1, "tanl",         1, _C99 },
 970         { rts_asinl,      1, "asinl",        1, _C99 },
 971         { rts_acosl,      1, "acosl",        1, _C99 },
 972         { rts_atanl,      1, "atanl",        1, _C99 },
 973         { rts_sinhl,      1, "sinhl",        1, _C99 },
 974         { rts_coshl,      1, "coshl",        1, _C99 },
 975         { rts_tanhl,      1, "tanhl",        1, _C99 },
 976
 977         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 978         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 979         { rts_strcmp,     1, "strcmp",       2, _C89 },
 980         { rts_strncmp,    1, "strncmp",      3, _C89 }
 981 };
 982
 983 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 984
 985 /**
 986  * Mangles an entity linker (ld) name for win32 usage.
 987  *
 988  * @param ent          the entity to be mangled
 989  * @param declaration  the declaration
 990  */
 991 static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration)
 992 {
 993         ident *id;
 994
 995         if (is_Method_type(get_entity_type(ent)))
 996                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 997         else {
 998                 /* always add an underscore in win32 */
 999                 id = mangle(id_underscore, get_entity_ident(ent));
1000         }
1001
1002         decl_modifiers_t decl_modifiers = declaration->modifiers;
1003         if (decl_modifiers & DM_DLLIMPORT) {
1004                 /* add prefix for imported symbols */
1005                 id = mangle(id_imp, id);
1006         }
1007         return id;
1008 }
1009
1010 /**
1011  * Mangles an entity linker (ld) name for Linux ELF usage.
1012  *
1013  * @param ent          the entity to be mangled
1014  * @param declaration  the declaration
1015  */
1016 static ident *create_ld_ident_linux_elf(ir_entity *entity,
1017                                         declaration_t *declaration)
1018 {
1019         (void) declaration;
1020         return get_entity_ident(entity);
1021 }
1022
1023 /**
1024  * Mangles an entity linker (ld) name for Mach-O usage.
1025  *
1026  * @param ent          the entity to be mangled
1027  * @param declaration  the declaration
1028  */
1029 static ident *create_ld_ident_macho(ir_entity *ent, declaration_t *declaration)
1030 {
1031         (void) declaration;
1032         ident *id = mangle(id_underscore, get_entity_ident(ent));
1033         return id;
1034 }
1035
1036 typedef ident* (*create_ld_ident_func)(ir_entity *entity,
1037                                        declaration_t *declaration);
1038 create_ld_ident_func  create_ld_ident = create_ld_ident_linux_elf;
1039
1040 /**
1041  * Handle GNU attributes for entities
1042  *
1043  * @param ent   the entity
1044  * @param decl  the routine declaration
1045  */
1046 static void handle_gnu_attributes_ent(ir_entity *ent, declaration_t *decl)
1047 {
1048         if (decl->modifiers & DM_PURE) {
1049                 /* TRUE if the declaration includes the GNU
1050                    __attribute__((pure)) specifier. */
1051                 set_entity_additional_property(ent, mtp_property_pure);
1052         }
1053         if (decl->modifiers & DM_CONST) {
1054                 set_entity_additional_property(ent, mtp_property_const);
1055                 have_const_functions = true;
1056         }
1057         if (decl->modifiers & DM_USED) {
1058                 /* TRUE if the declaration includes the GNU
1059                    __attribute__((used)) specifier. */
1060                 set_entity_stickyness(ent, stickyness_sticky);
1061         }
1062 }
1063
1064 /**
1065  * Creates an entity representing a function.
1066  *
1067  * @param declaration  the function declaration
1068  */
1069 static ir_entity *get_function_entity(declaration_t *declaration)
1070 {
1071         if (declaration->declaration_kind == DECLARATION_KIND_FUNCTION ||
1072             declaration->declaration_kind == DECLARATION_KIND_INNER_FUNCTION)
1073                 return declaration->v.entity;
1074         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
1075
1076         symbol_t *symbol = declaration->symbol;
1077         ident    *id     = new_id_from_str(symbol->string);
1078
1079         ir_type  *global_type    = get_glob_type();
1080         ir_type  *ir_type_method = get_ir_type(declaration->type);
1081         assert(is_Method_type(ir_type_method));
1082
1083         /* already an entity defined? */
1084         ir_entity *entity = entitymap_get(&entitymap, symbol);
1085         if (entity != NULL) {
1086                 if (get_entity_visibility(entity) == visibility_external_allocated
1087                                 && declaration->init.statement != NULL) {
1088                         set_entity_visibility(entity, visibility_external_visible);
1089                 }
1090                 goto entity_created;
1091         }
1092
1093         dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
1094         entity               = new_d_entity(global_type, id, ir_type_method, dbgi);
1095         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
1096
1097         handle_gnu_attributes_ent(entity, declaration);
1098
1099         /* static inline             => local
1100          * extern inline             => local
1101          * inline without definition => local
1102          * inline with definition    => external_visible */
1103         storage_class_tag_t const storage_class = (storage_class_tag_t)declaration->storage_class;
1104         bool                const is_inline     = declaration->is_inline;
1105         bool                const has_body      = declaration->init.statement != NULL;
1106         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1107                 set_entity_visibility(entity, visibility_external_visible);
1108         } else if (storage_class == STORAGE_CLASS_STATIC ||
1109                    (is_inline && has_body)) {
1110                 if (!has_body) {
1111                         /* this entity was declared, but is defined nowhere */
1112                         set_entity_peculiarity(entity, peculiarity_description);
1113                 }
1114                 set_entity_visibility(entity, visibility_local);
1115         } else if (has_body) {
1116                 set_entity_visibility(entity, visibility_external_visible);
1117         } else {
1118                 set_entity_visibility(entity, visibility_external_allocated);
1119         }
1120         set_entity_allocation(entity, allocation_static);
1121
1122         /* We should check for file scope here, but as long as we compile C only
1123            this is not needed. */
1124         if (! firm_opt.freestanding) {
1125                 /* check for a known runtime function */
1126                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1127                         if (id != rts_idents[i])
1128                                 continue;
1129
1130                         /* ignore those rts functions not necessary needed for current mode */
1131                         if ((c_mode & rts_data[i].flags) == 0)
1132                                 continue;
1133                         assert(rts_entities[rts_data[i].id] == NULL);
1134                         rts_entities[rts_data[i].id] = entity;
1135                 }
1136         }
1137
1138         entitymap_insert(&entitymap, symbol, entity);
1139
1140 entity_created:
1141         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1142         declaration->v.entity         = entity;
1143
1144         return entity;
1145 }
1146
1147 /**
1148  * Creates a Const node representing a constant.
1149  */
1150 static ir_node *const_to_firm(const const_expression_t *cnst)
1151 {
1152         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1153         ir_mode  *mode = get_ir_mode(cnst->base.type);
1154
1155         char    buf[128];
1156         tarval *tv;
1157         size_t  len;
1158         if (mode_is_float(mode)) {
1159                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1160         } else {
1161                 if (mode_is_signed(mode)) {
1162                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1163                 } else {
1164                         len = snprintf(buf, sizeof(buf), "%llu",
1165                                        (unsigned long long) cnst->v.int_value);
1166                 }
1167                 tv = new_tarval_from_str(buf, len, mode);
1168         }
1169
1170         return new_d_Const(dbgi, mode, tv);
1171 }
1172
1173 /**
1174  * Creates a Const node representing a character constant.
1175  */
1176 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1177 {
1178         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1179         ir_mode  *mode = get_ir_mode(cnst->base.type);
1180
1181         long long int v = 0;
1182         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1183                 if (char_is_signed) {
1184                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1185                 } else {
1186                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1187                 }
1188         }
1189         char    buf[128];
1190         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1191         tarval *tv = new_tarval_from_str(buf, len, mode);
1192
1193         return new_d_Const(dbgi, mode, tv);
1194 }
1195
1196 /**
1197  * Creates a Const node representing a wide character constant.
1198  */
1199 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1200 {
1201         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1202         ir_mode  *mode = get_ir_mode(cnst->base.type);
1203
1204         long long int v = cnst->v.wide_character.begin[0];
1205
1206         char    buf[128];
1207         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1208         tarval *tv = new_tarval_from_str(buf, len, mode);
1209
1210         return new_d_Const(dbgi, mode, tv);
1211 }
1212
1213 /**
1214  * Creates a SymConst for a given entity.
1215  *
1216  * @param dbgi    debug info
1217  * @param mode    the (reference) mode for the SymConst
1218  * @param entity  the entity
1219  */
1220 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1221                               ir_entity *entity)
1222 {
1223         assert(entity != NULL);
1224         union symconst_symbol sym;
1225         sym.entity_p = entity;
1226         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1227 }
1228
1229 /**
1230  * Creates a SymConst node representing a string constant.
1231  *
1232  * @param src_pos    the source position of the string constant
1233  * @param id_prefix  a prefix for the name of the generated string constant
1234  * @param value      the value of the string constant
1235  */
1236 static ir_node *string_to_firm(const source_position_t *const src_pos,
1237                                const char *const id_prefix,
1238                                const string_t *const value)
1239 {
1240         ir_type  *const global_type = get_glob_type();
1241         dbg_info *const dbgi        = get_dbg_info(src_pos);
1242         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1243                                                        ir_type_const_char, dbgi);
1244
1245         ident     *const id     = id_unique(id_prefix);
1246         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1247         set_entity_ld_ident(entity, id);
1248         set_entity_variability(entity, variability_constant);
1249         set_entity_allocation(entity, allocation_static);
1250
1251         ir_type *const elem_type = ir_type_const_char;
1252         ir_mode *const mode      = get_type_mode(elem_type);
1253
1254         const char* const string = value->begin;
1255         const size_t      slen   = value->size;
1256
1257         set_array_lower_bound_int(type, 0, 0);
1258         set_array_upper_bound_int(type, 0, slen);
1259         set_type_size_bytes(type, slen);
1260         set_type_state(type, layout_fixed);
1261
1262         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1263         for(size_t i = 0; i < slen; ++i) {
1264                 tvs[i] = new_tarval_from_long(string[i], mode);
1265         }
1266
1267         set_array_entity_values(entity, tvs, slen);
1268         free(tvs);
1269
1270         return create_symconst(dbgi, mode_P_data, entity);
1271 }
1272
1273 /**
1274  * Creates a SymConst node representing a string literal.
1275  *
1276  * @param literal   the string literal
1277  */
1278 static ir_node *string_literal_to_firm(
1279                 const string_literal_expression_t* literal)
1280 {
1281         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1282                               &literal->value);
1283 }
1284
1285 /**
1286  * Creates a SymConst node representing a wide string literal.
1287  *
1288  * @param literal   the wide string literal
1289  */
1290 static ir_node *wide_string_literal_to_firm(
1291         const wide_string_literal_expression_t* const literal)
1292 {
1293         ir_type *const global_type = get_glob_type();
1294         ir_type *const elem_type   = ir_type_wchar_t;
1295         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1296         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1297                                                     elem_type, dbgi);
1298
1299         ident     *const id     = id_unique("Lstr.%u");
1300         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1301         set_entity_ld_ident(entity, id);
1302         set_entity_variability(entity, variability_constant);
1303         set_entity_allocation(entity, allocation_static);
1304
1305         ir_mode *const mode      = get_type_mode(elem_type);
1306
1307         const wchar_rep_t *const string = literal->value.begin;
1308         const size_t             slen   = literal->value.size;
1309
1310         set_array_lower_bound_int(type, 0, 0);
1311         set_array_upper_bound_int(type, 0, slen);
1312         set_type_size_bytes(type, slen);
1313         set_type_state(type, layout_fixed);
1314
1315         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1316         for(size_t i = 0; i < slen; ++i) {
1317                 tvs[i] = new_tarval_from_long(string[i], mode);
1318         }
1319
1320         set_array_entity_values(entity, tvs, slen);
1321         free(tvs);
1322
1323         return create_symconst(dbgi, mode_P_data, entity);
1324 }
1325
1326 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1327                                       ir_node *const addr)
1328 {
1329         ir_type *irtype = get_ir_type(type);
1330         if (is_compound_type(irtype)
1331                         || is_Method_type(irtype)
1332                         || is_Array_type(irtype)) {
1333                 return addr;
1334         }
1335
1336         ir_mode *const mode     = get_type_mode(irtype);
1337         ir_node *const memory   = get_store();
1338         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1339         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1340         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1341
1342         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1343                 set_Load_volatility(load, volatility_is_volatile);
1344         }
1345
1346         set_store(load_mem);
1347         return load_res;
1348 }
1349
1350 /**
1351  * Creates a strict Conv if neccessary.
1352  */
1353 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1354 {
1355         ir_mode *mode = get_irn_mode(node);
1356
1357         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1358                 return node;
1359         if (!mode_is_float(mode))
1360                 return node;
1361
1362         /* check if there is already a Conv */
1363         if (is_Conv(node)) {
1364                 /* convert it into a strict Conv */
1365                 set_Conv_strict(node, 1);
1366                 return node;
1367         }
1368
1369         /* otherwise create a new one */
1370         return new_d_strictConv(dbgi, node, mode);
1371 }
1372
1373 static ir_node *get_global_var_address(dbg_info *const dbgi,
1374                                        const declaration_t *const decl)
1375 {
1376         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1377
1378         ir_entity *const entity = decl->v.entity;
1379         switch ((storage_class_tag_t)decl->storage_class) {
1380                 case STORAGE_CLASS_THREAD:
1381                 case STORAGE_CLASS_THREAD_EXTERN:
1382                 case STORAGE_CLASS_THREAD_STATIC: {
1383                         ir_node *const no_mem = new_NoMem();
1384                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1385                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1386                 }
1387
1388                 default:
1389                         return create_symconst(dbgi, mode_P_data, entity);
1390         }
1391 }
1392
1393 /**
1394  * Returns the correct base address depending on whether it is a parameter or a
1395  * normal local variable.
1396  */
1397 static ir_node *get_local_frame(ir_entity *const ent)
1398 {
1399         ir_graph      *const irg   = current_ir_graph;
1400         const ir_type *const owner = get_entity_owner(ent);
1401         if (owner == get_irg_frame_type(irg)) {
1402                 return get_irg_frame(irg);
1403         } else {
1404                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1405                 return get_irg_value_param_base(irg);
1406         }
1407 }
1408
1409 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1410 {
1411         ir_mode *value_mode = get_irn_mode(value);
1412
1413         if (value_mode == dest_mode || is_Bad(value))
1414                 return value;
1415
1416         if (dest_mode == mode_b) {
1417                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1418                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1419                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1420                 return proj;
1421         }
1422
1423         return new_d_Conv(dbgi, value, dest_mode);
1424 }
1425
1426 /**
1427  * Keep all memory edges of the given block.
1428  */
1429 static void keep_all_memory(ir_node *block) {
1430         ir_node *old = get_cur_block();
1431
1432         set_cur_block(block);
1433         keep_alive(get_store());
1434         /* TODO: keep all memory edges from restricted pointers */
1435         set_cur_block(old);
1436 }
1437
1438 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1439 {
1440         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1441         declaration_t *declaration = ref->declaration;
1442         type_t        *type        = skip_typeref(declaration->type);
1443
1444         /* make sure the type is constructed */
1445         (void) get_ir_type(type);
1446
1447         switch ((declaration_kind_t)declaration->declaration_kind) {
1448         case DECLARATION_KIND_TYPE:
1449         case DECLARATION_KIND_UNKNOWN:
1450                 break;
1451
1452         case DECLARATION_KIND_ENUM_ENTRY: {
1453                 ir_mode *const mode = get_ir_mode(type);
1454                 if (ref->is_outer_ref) {
1455                         /* reference to an outer variable */
1456                         panic("Outer variable reference not implemented");
1457                 } else {
1458                         return new_Const(mode, declaration->v.enum_val);
1459                 }
1460         }
1461
1462         case DECLARATION_KIND_LOCAL_VARIABLE: {
1463                 ir_mode *const mode = get_ir_mode(type);
1464                 return get_value(declaration->v.value_number, mode);
1465         }
1466         case DECLARATION_KIND_FUNCTION: {
1467                 ir_mode *const mode = get_ir_mode(type);
1468                 return create_symconst(dbgi, mode, declaration->v.entity);
1469         }
1470         case DECLARATION_KIND_INNER_FUNCTION: {
1471                 ir_mode *const mode = get_ir_mode(type);
1472                 if (! declaration->goto_to_outer && !declaration->need_closure) {
1473                         /* inner function not using the closure */
1474                         return create_symconst(dbgi, mode, declaration->v.entity);
1475                 } else {
1476                         /* TODO: need trampoline here */
1477                         panic("Trampoline code not implemented");
1478                         return create_symconst(dbgi, mode, declaration->v.entity);
1479                 }
1480         }
1481         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1482                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1483                 return deref_address(dbgi, declaration->type, addr);
1484         }
1485
1486         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1487                 ir_entity *entity = declaration->v.entity;
1488                 ir_node   *frame  = get_local_frame(entity);
1489                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1490                 return deref_address(dbgi, declaration->type, sel);
1491         }
1492
1493         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1494                 return declaration->v.vla_base;
1495
1496         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1497         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1498         case DECLARATION_KIND_COMPOUND_MEMBER:
1499         case DECLARATION_KIND_LABEL_BLOCK:
1500                 panic("not implemented reference type");
1501         }
1502
1503         panic("reference to declaration with unknown type found");
1504 }
1505
1506 static ir_node *reference_addr(const reference_expression_t *ref)
1507 {
1508         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1509         declaration_t *declaration = ref->declaration;
1510
1511         switch((declaration_kind_t) declaration->declaration_kind) {
1512         case DECLARATION_KIND_TYPE:
1513         case DECLARATION_KIND_UNKNOWN:
1514                 break;
1515         case DECLARATION_KIND_LOCAL_VARIABLE:
1516                 /* you can store to a local variable (so we don't panic but return NULL
1517                  * as an indicator for no real address) */
1518                 return NULL;
1519         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1520                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1521                 return addr;
1522         }
1523         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1524                 ir_entity *entity = declaration->v.entity;
1525                 ir_node   *frame  = get_local_frame(entity);
1526                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1527
1528                 return sel;
1529         }
1530
1531         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1532                 return declaration->v.vla_base;
1533
1534         case DECLARATION_KIND_ENUM_ENTRY:
1535                 panic("trying to reference enum entry");
1536
1537         case DECLARATION_KIND_FUNCTION: {
1538                 type_t  *const type = skip_typeref(declaration->type);
1539                 ir_mode *const mode = get_ir_mode(type);
1540                 return create_symconst(dbgi, mode, declaration->v.entity);
1541         }
1542
1543         case DECLARATION_KIND_INNER_FUNCTION:
1544         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1545         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1546         case DECLARATION_KIND_COMPOUND_MEMBER:
1547         case DECLARATION_KIND_LABEL_BLOCK:
1548                 panic("not implemented reference type");
1549         }
1550
1551         panic("reference to declaration with unknown type found");
1552 }
1553
1554 /**
1555  * Transform calls to builtin functions.
1556  */
1557 static ir_node *process_builtin_call(const call_expression_t *call)
1558 {
1559         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1560
1561         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1562         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1563
1564         type_t *type = skip_typeref(builtin->base.type);
1565         assert(is_type_pointer(type));
1566
1567         type_t   *function_type = skip_typeref(type->pointer.points_to);
1568         symbol_t *symbol        = builtin->symbol;
1569
1570         switch(symbol->ID) {
1571         case T___builtin_alloca: {
1572                 if (call->arguments == NULL || call->arguments->next != NULL) {
1573                         panic("invalid number of parameters on __builtin_alloca");
1574                 }
1575                 expression_t *argument = call->arguments->expression;
1576                 ir_node      *size     = expression_to_firm(argument);
1577
1578                 ir_node *store  = get_store();
1579                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1580                                               stack_alloc);
1581                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1582                 set_store(proj_m);
1583                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1584
1585                 return res;
1586         }
1587
1588         case T___builtin_huge_val:
1589         case T___builtin_inf:
1590         case T___builtin_inff:
1591         case T___builtin_infl: {
1592                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1593                 tarval  *tv   = get_mode_infinite(mode);
1594                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1595                 return   res;
1596         }
1597         case T___builtin_nan:
1598         case T___builtin_nanf:
1599         case T___builtin_nanl: {
1600                 /* Ignore string for now... */
1601                 assert(is_type_function(function_type));
1602                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1603                 tarval  *tv   = get_mode_NAN(mode);
1604                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1605                 return res;
1606         }
1607         case T___builtin_va_end:
1608                 return NULL;
1609         default:
1610                 panic("Unsupported builtin found\n");
1611         }
1612 }
1613
1614 /**
1615  * Transform a call expression.
1616  * Handles some special cases, like alloca() calls, which must be resolved
1617  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1618  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1619  * handled right...
1620  */
1621 static ir_node *call_expression_to_firm(const call_expression_t *call)
1622 {
1623         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1624         assert(get_cur_block() != NULL);
1625
1626         expression_t *function = call->function;
1627         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1628                 return process_builtin_call(call);
1629         }
1630         if (function->kind == EXPR_REFERENCE) {
1631                 const reference_expression_t *ref = &function->reference;
1632                 declaration_t *declaration = ref->declaration;
1633
1634                 if ((declaration_kind_t)declaration->declaration_kind == DECLARATION_KIND_FUNCTION) {
1635                         if (declaration->v.entity == rts_entities[rts_alloca]) {
1636                                 /* handle alloca() call */
1637                                 expression_t *argument = call->arguments->expression;
1638                                 ir_node      *size     = expression_to_firm(argument);
1639
1640                                 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1641
1642                                 ir_node  *store  = get_store();
1643                                 dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1644                                 ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1645                                                                stack_alloc);
1646                                 ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1647                                 set_store(proj_m);
1648                                 ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1649
1650                                 return res;
1651                         }
1652                 }
1653         }
1654         ir_node *callee = expression_to_firm(function);
1655
1656         type_t *type = skip_typeref(function->base.type);
1657         assert(is_type_pointer(type));
1658         pointer_type_t *pointer_type = &type->pointer;
1659         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1660         assert(is_type_function(points_to));
1661         function_type_t *function_type = &points_to->function;
1662
1663         int      n_parameters = 0;
1664         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1665         ir_type *new_method_type = NULL;
1666         if (function_type->variadic || function_type->unspecified_parameters) {
1667                 const call_argument_t *argument = call->arguments;
1668                 for( ; argument != NULL; argument = argument->next) {
1669                         ++n_parameters;
1670                 }
1671
1672                 /* we need to construct a new method type matching the call
1673                  * arguments... */
1674                 int n_res       = get_method_n_ress(ir_method_type);
1675                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1676                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1677                                                     n_parameters, n_res, dbgi);
1678                 set_method_calling_convention(new_method_type,
1679                                get_method_calling_convention(ir_method_type));
1680                 set_method_additional_properties(new_method_type,
1681                                get_method_additional_properties(ir_method_type));
1682                 set_method_variadicity(new_method_type,
1683                                        get_method_variadicity(ir_method_type));
1684
1685                 for(int i = 0; i < n_res; ++i) {
1686                         set_method_res_type(new_method_type, i,
1687                                             get_method_res_type(ir_method_type, i));
1688                 }
1689                 argument = call->arguments;
1690                 for(int i = 0; i < n_parameters; ++i, argument = argument->next) {
1691                         expression_t *expression = argument->expression;
1692                         ir_type      *irtype     = get_ir_type(expression->base.type);
1693                         set_method_param_type(new_method_type, i, irtype);
1694                 }
1695                 ir_method_type = new_method_type;
1696         } else {
1697                 n_parameters = get_method_n_params(ir_method_type);
1698         }
1699
1700         ir_node *in[n_parameters];
1701
1702         const call_argument_t *argument = call->arguments;
1703         for(int n = 0; n < n_parameters; ++n) {
1704                 expression_t *expression = argument->expression;
1705                 ir_node      *arg_node   = expression_to_firm(expression);
1706
1707                 arg_node = do_strict_conv(dbgi, arg_node);
1708
1709                 in[n] = arg_node;
1710
1711                 argument = argument->next;
1712         }
1713
1714         ir_node  *store = get_store();
1715         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1716                                      ir_method_type);
1717         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1718         set_store(mem);
1719
1720         type_t  *return_type = skip_typeref(function_type->return_type);
1721         ir_node *result      = NULL;
1722
1723         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1724                 ir_mode *mode;
1725                 if (is_type_scalar(return_type)) {
1726                         mode = get_ir_mode(return_type);
1727                 } else {
1728                         mode = mode_P_data;
1729                 }
1730                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1731                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1732         }
1733
1734         if (function->kind == EXPR_REFERENCE &&
1735             function->reference.declaration->modifiers & DM_NORETURN) {
1736                 /* A dead end:  Keep the Call and the Block.  Also place all further
1737                  * nodes into a new and unreachable block. */
1738                 keep_alive(node);
1739                 keep_alive(get_cur_block());
1740                 new_Block(0, NULL);
1741         }
1742
1743         return result;
1744 }
1745
1746 static void statement_to_firm(statement_t *statement);
1747 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1748
1749 static ir_node *expression_to_addr(const expression_t *expression);
1750 static ir_node *create_condition_evaluation(const expression_t *expression,
1751                                             ir_node *true_block,
1752                                             ir_node *false_block);
1753
1754 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1755                          ir_node *value)
1756 {
1757         value = do_strict_conv(dbgi, value);
1758
1759         ir_node *memory = get_store();
1760
1761         if (is_type_scalar(type)) {
1762                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1763                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1764                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1765                         set_Store_volatility(store, volatility_is_volatile);
1766                 set_store(store_mem);
1767         } else {
1768                 ir_type *irtype    = get_ir_type(type);
1769                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1770                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1771                 set_store(copyb_mem);
1772         }
1773 }
1774
1775 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1776 {
1777         tarval *all_one   = get_mode_all_one(mode);
1778         int     mode_size = get_mode_size_bits(mode);
1779
1780         assert(offset >= 0);
1781         assert(size   >= 0);
1782         assert(offset + size <= mode_size);
1783         if (size == mode_size) {
1784                 return all_one;
1785         }
1786
1787         long    shiftr    = get_mode_size_bits(mode) - size;
1788         long    shiftl    = offset;
1789         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1790         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1791         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1792         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1793
1794         return mask1;
1795 }
1796
1797 static void bitfield_store_to_firm(dbg_info *dbgi,
1798                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1799 {
1800         ir_mode *mode = get_irn_mode(value);
1801
1802         /* kill upper bits of value and shift to right position */
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 (set_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                         ir_entity *entity = select->compound_entry->v.entity;
1904                         bool       set_volatile
1905                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1906                         bitfield_store_to_firm(dbgi, entity, addr, value, set_volatile);
1907                         return;
1908                 }
1909         }
1910
1911         assign_value(dbgi, addr, type, value);
1912 }
1913
1914 static void set_value_for_expression(const expression_t *expression,
1915                                      ir_node *value)
1916 {
1917         set_value_for_expression_addr(expression, value, NULL);
1918 }
1919
1920 static ir_node *get_value_from_lvalue(const expression_t *expression,
1921                                       ir_node *addr)
1922 {
1923         if (expression->kind == EXPR_REFERENCE) {
1924                 const reference_expression_t *ref = &expression->reference;
1925
1926                 declaration_t *declaration = ref->declaration;
1927                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1928                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1929                         assert(addr == NULL);
1930                         ir_mode *mode = get_ir_mode(expression->base.type);
1931                         return get_value(declaration->v.value_number, mode);
1932                 }
1933         }
1934
1935         assert(addr != NULL);
1936         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1937
1938         ir_node *value;
1939         if (expression->kind == EXPR_SELECT &&
1940             expression->select.compound_entry->type->kind == TYPE_BITFIELD){
1941                 value = bitfield_extract_to_firm(&expression->select, addr);
1942         } else {
1943                 value = deref_address(dbgi, expression->base.type, addr);
1944         }
1945
1946         return value;
1947 }
1948
1949
1950 static ir_node *create_incdec(const unary_expression_t *expression)
1951 {
1952         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1953         const expression_t *value_expr = expression->value;
1954         ir_node            *addr       = expression_to_addr(value_expr);
1955         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1956
1957         type_t  *type = skip_typeref(expression->base.type);
1958         ir_mode *mode = get_ir_mode(expression->base.type);
1959
1960         ir_node *offset;
1961         if (is_type_pointer(type)) {
1962                 pointer_type_t *pointer_type = &type->pointer;
1963                 offset                       = get_type_size(pointer_type->points_to);
1964         } else {
1965                 assert(is_type_arithmetic(type));
1966                 offset = new_Const(mode, get_mode_one(mode));
1967         }
1968
1969         ir_node *result;
1970         ir_node *store_value;
1971         switch(expression->base.kind) {
1972         case EXPR_UNARY_POSTFIX_INCREMENT:
1973                 result      = value;
1974                 store_value = new_d_Add(dbgi, value, offset, mode);
1975                 break;
1976         case EXPR_UNARY_POSTFIX_DECREMENT:
1977                 result      = value;
1978                 store_value = new_d_Sub(dbgi, value, offset, mode);
1979                 break;
1980         case EXPR_UNARY_PREFIX_INCREMENT:
1981                 result      = new_d_Add(dbgi, value, offset, mode);
1982                 store_value = result;
1983                 break;
1984         case EXPR_UNARY_PREFIX_DECREMENT:
1985                 result      = new_d_Sub(dbgi, value, offset, mode);
1986                 store_value = result;
1987                 break;
1988         default:
1989                 panic("no incdec expr in create_incdec");
1990         }
1991
1992         set_value_for_expression_addr(value_expr, store_value, addr);
1993
1994         return result;
1995 }
1996
1997 static bool is_local_variable(expression_t *expression)
1998 {
1999         if (expression->kind != EXPR_REFERENCE)
2000                 return false;
2001         reference_expression_t *ref_expr    = &expression->reference;
2002         declaration_t          *declaration = ref_expr->declaration;
2003         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
2004 }
2005
2006 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2007 {
2008         switch(kind) {
2009         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2010         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2011         case EXPR_BINARY_NOTEQUAL:
2012                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2013         case EXPR_BINARY_ISLESS:
2014         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2015         case EXPR_BINARY_ISLESSEQUAL:
2016         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2017         case EXPR_BINARY_ISGREATER:
2018         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2019         case EXPR_BINARY_ISGREATEREQUAL:
2020         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2021         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2022
2023         default:
2024                 break;
2025         }
2026         panic("trying to get pn_Cmp from non-comparison binexpr type");
2027 }
2028
2029 /**
2030  * Handle the assume optimizer hint: check if a Confirm
2031  * node can be created.
2032  *
2033  * @param dbi    debug info
2034  * @param expr   the IL assume expression
2035  *
2036  * we support here only some simple cases:
2037  *  - var rel const
2038  *  - const rel val
2039  *  - var rel var
2040  */
2041 static ir_node *handle_assume_compare(dbg_info *dbi,
2042                                       const binary_expression_t *expression)
2043 {
2044         expression_t  *op1 = expression->left;
2045         expression_t  *op2 = expression->right;
2046         declaration_t *var2, *var = NULL;
2047         ir_node       *res = NULL;
2048         pn_Cmp         cmp_val;
2049
2050         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2051
2052         if (is_local_variable(op1) && is_local_variable(op2)) {
2053         var  = op1->reference.declaration;
2054             var2 = op2->reference.declaration;
2055
2056                 type_t  *const type = skip_typeref(var->type);
2057                 ir_mode *const mode = get_ir_mode(type);
2058
2059                 ir_node *const irn1 = get_value(var->v.value_number, mode);
2060                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
2061
2062                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2063                 set_value(var2->v.value_number, res);
2064
2065                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2066                 set_value(var->v.value_number, res);
2067
2068                 return res;
2069         }
2070
2071         expression_t *con;
2072         if (is_local_variable(op1) && is_constant_expression(op2)) {
2073                 var = op1->reference.declaration;
2074                 con = op2;
2075         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2076                 cmp_val = get_inversed_pnc(cmp_val);
2077                 var = op2->reference.declaration;
2078                 con = op1;
2079         }
2080
2081         if (var != NULL) {
2082                 type_t  *const type = skip_typeref(var->type);
2083                 ir_mode *const mode = get_ir_mode(type);
2084
2085                 res = get_value(var->v.value_number, mode);
2086                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2087                 set_value(var->v.value_number, res);
2088         }
2089         return res;
2090 }
2091
2092 /**
2093  * Handle the assume optimizer hint.
2094  *
2095  * @param dbi    debug info
2096  * @param expr   the IL assume expression
2097  */
2098 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2099         switch(expression->kind) {
2100         case EXPR_BINARY_EQUAL:
2101         case EXPR_BINARY_NOTEQUAL:
2102         case EXPR_BINARY_LESS:
2103         case EXPR_BINARY_LESSEQUAL:
2104         case EXPR_BINARY_GREATER:
2105         case EXPR_BINARY_GREATEREQUAL:
2106                 return handle_assume_compare(dbi, &expression->binary);
2107         default:
2108                 return NULL;
2109         }
2110 }
2111
2112 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2113 {
2114         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2115         type_t   *type = skip_typeref(expression->base.type);
2116
2117         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2118                 return expression_to_addr(expression->value);
2119
2120         const expression_t *value = expression->value;
2121
2122         switch(expression->base.kind) {
2123         case EXPR_UNARY_NEGATE: {
2124                 ir_node *value_node = expression_to_firm(value);
2125                 ir_mode *mode = get_ir_mode(type);
2126                 return new_d_Minus(dbgi, value_node, mode);
2127         }
2128         case EXPR_UNARY_PLUS:
2129                 return expression_to_firm(value);
2130         case EXPR_UNARY_BITWISE_NEGATE: {
2131                 ir_node *value_node = expression_to_firm(value);
2132                 ir_mode *mode = get_ir_mode(type);
2133                 return new_d_Not(dbgi, value_node, mode);
2134         }
2135         case EXPR_UNARY_NOT: {
2136                 ir_node *value_node = _expression_to_firm(value);
2137                 value_node          = create_conv(dbgi, value_node, mode_b);
2138                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2139                 return res;
2140         }
2141         case EXPR_UNARY_DEREFERENCE: {
2142                 ir_node *value_node = expression_to_firm(value);
2143                 type_t  *value_type = skip_typeref(value->base.type);
2144                 assert(is_type_pointer(value_type));
2145                 type_t  *points_to  = value_type->pointer.points_to;
2146                 return deref_address(dbgi, points_to, value_node);
2147         }
2148         case EXPR_UNARY_POSTFIX_INCREMENT:
2149         case EXPR_UNARY_POSTFIX_DECREMENT:
2150         case EXPR_UNARY_PREFIX_INCREMENT:
2151         case EXPR_UNARY_PREFIX_DECREMENT:
2152                 return create_incdec(expression);
2153         case EXPR_UNARY_CAST: {
2154                 ir_node *value_node = expression_to_firm(value);
2155                 if (is_type_scalar(type)) {
2156                         ir_mode *mode = get_ir_mode(type);
2157                         ir_node *node = create_conv(dbgi, value_node, mode);
2158                         node = do_strict_conv(dbgi, node);
2159                         return node;
2160                 } else {
2161                         /* make sure firm type is constructed */
2162                         (void) get_ir_type(type);
2163                         return value_node;
2164                 }
2165         }
2166         case EXPR_UNARY_CAST_IMPLICIT: {
2167                 ir_node *value_node = expression_to_firm(value);
2168                 if (is_type_scalar(type)) {
2169                         ir_mode *mode = get_ir_mode(type);
2170                         return create_conv(dbgi, value_node, mode);
2171                 } else {
2172                         return value_node;
2173                 }
2174         }
2175         case EXPR_UNARY_ASSUME:
2176                 if (firm_opt.confirm)
2177                         return handle_assume(dbgi, value);
2178                 else
2179                         return NULL;
2180
2181         default:
2182                 break;
2183         }
2184         panic("invalid UNEXPR type found");
2185 }
2186
2187 /**
2188  * produces a 0/1 depending of the value of a mode_b node
2189  */
2190 static ir_node *produce_condition_result(const expression_t *expression,
2191                                          dbg_info *dbgi)
2192 {
2193         ir_mode *mode      = get_ir_mode(expression->base.type);
2194         ir_node *cur_block = get_cur_block();
2195
2196         ir_node *one_block = new_immBlock();
2197         ir_node *one       = new_Const(mode, get_mode_one(mode));
2198         ir_node *jmp_one   = new_d_Jmp(dbgi);
2199
2200         ir_node *zero_block = new_immBlock();
2201         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2202         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2203
2204         set_cur_block(cur_block);
2205         create_condition_evaluation(expression, one_block, zero_block);
2206         mature_immBlock(one_block);
2207         mature_immBlock(zero_block);
2208
2209         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2210         new_Block(2, in_cf);
2211
2212         ir_node *in[2] = { one, zero };
2213         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2214
2215         return val;
2216 }
2217
2218 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2219                 ir_node *value, type_t *type)
2220 {
2221         pointer_type_t *const pointer_type = &type->pointer;
2222         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2223         unsigned              elem_size    = get_type_size_const(points_to);
2224
2225         /* gcc extension: allow arithmetic with void * and function * */
2226         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2227             is_type_function(points_to))  {
2228                 elem_size = 1;
2229         }
2230
2231         assert(elem_size >= 1);
2232         if (elem_size == 1)
2233                 return value;
2234
2235         value = create_conv(dbgi, value, mode_int);
2236         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2237         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2238         return mul;
2239 }
2240
2241 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2242                           ir_node *left, ir_node *right)
2243 {
2244         ir_mode  *mode;
2245         type_t   *type_left  = skip_typeref(expression->left->base.type);
2246         type_t   *type_right = skip_typeref(expression->right->base.type);
2247
2248         expression_kind_t kind = expression->base.kind;
2249
2250         switch (kind) {
2251         case EXPR_BINARY_SHIFTLEFT:
2252         case EXPR_BINARY_SHIFTRIGHT:
2253         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2254         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2255                 mode  = get_irn_mode(left);
2256                 right = create_conv(dbgi, right, mode_uint);
2257                 break;
2258
2259         case EXPR_BINARY_SUB:
2260                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2261                         const pointer_type_t *const ptr_type = &type_left->pointer;
2262
2263                         mode = get_ir_mode(expression->base.type);
2264                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2265                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2266                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2267                         ir_node *const no_mem    = new_NoMem();
2268                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2269                                                                                                    mode, op_pin_state_floats);
2270                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2271                 }
2272                 /* fallthrough */
2273         case EXPR_BINARY_SUB_ASSIGN:
2274                 if (is_type_pointer(type_left)) {
2275                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2276                         mode  = get_ir_mode(type_left);
2277                         break;
2278                 }
2279                 goto normal_node;
2280
2281         case EXPR_BINARY_ADD:
2282         case EXPR_BINARY_ADD_ASSIGN:
2283                 if (is_type_pointer(type_left)) {
2284                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2285                         mode  = get_ir_mode(type_left);
2286                         break;
2287                 } else if (is_type_pointer(type_right)) {
2288                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2289                         mode  = get_ir_mode(type_right);
2290                         break;
2291                 }
2292                 goto normal_node;
2293
2294         default:
2295 normal_node:
2296                 mode = get_irn_mode(right);
2297                 left = create_conv(dbgi, left, mode);
2298                 break;
2299         }
2300
2301         switch (kind) {
2302         case EXPR_BINARY_ADD_ASSIGN:
2303         case EXPR_BINARY_ADD:
2304                 return new_d_Add(dbgi, left, right, mode);
2305         case EXPR_BINARY_SUB_ASSIGN:
2306         case EXPR_BINARY_SUB:
2307                 return new_d_Sub(dbgi, left, right, mode);
2308         case EXPR_BINARY_MUL_ASSIGN:
2309         case EXPR_BINARY_MUL:
2310                 return new_d_Mul(dbgi, left, right, mode);
2311         case EXPR_BINARY_BITWISE_AND:
2312         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2313                 return new_d_And(dbgi, left, right, mode);
2314         case EXPR_BINARY_BITWISE_OR:
2315         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2316                 return new_d_Or(dbgi, left, right, mode);
2317         case EXPR_BINARY_BITWISE_XOR:
2318         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2319                 return new_d_Eor(dbgi, left, right, mode);
2320         case EXPR_BINARY_SHIFTLEFT:
2321         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2322                 return new_d_Shl(dbgi, left, right, mode);
2323         case EXPR_BINARY_SHIFTRIGHT:
2324         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2325                 if (mode_is_signed(mode)) {
2326                         return new_d_Shrs(dbgi, left, right, mode);
2327                 } else {
2328                         return new_d_Shr(dbgi, left, right, mode);
2329                 }
2330         case EXPR_BINARY_DIV:
2331         case EXPR_BINARY_DIV_ASSIGN: {
2332                 ir_node *pin = new_Pin(new_NoMem());
2333                 ir_node *op;
2334                 ir_node *res;
2335                 if (mode_is_float(mode)) {
2336                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2337                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2338                 } else {
2339                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2340                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2341                 }
2342                 return res;
2343         }
2344         case EXPR_BINARY_MOD:
2345         case EXPR_BINARY_MOD_ASSIGN: {
2346                 ir_node *pin = new_Pin(new_NoMem());
2347                 assert(!mode_is_float(mode));
2348                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2349                                          op_pin_state_floats);
2350                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2351                 return res;
2352         }
2353         default:
2354                 panic("unexpected expression kind");
2355         }
2356 }
2357
2358 static ir_node *create_lazy_op(const binary_expression_t *expression)
2359 {
2360         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2361         type_t   *type = expression->base.type;
2362         ir_mode  *mode = get_ir_mode(type);
2363
2364         if (is_constant_expression(expression->left)) {
2365                 long val = fold_constant(expression->left);
2366                 expression_kind_t ekind = expression->base.kind;
2367                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2368                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2369                     (ekind == EXPR_BINARY_LOGICAL_OR  && val == 0)) {
2370                         return expression_to_firm(expression->right);
2371                 } else {
2372                         return new_Const(mode, get_mode_one(mode));
2373                 }
2374         }
2375
2376         return produce_condition_result((const expression_t*) expression, dbgi);
2377 }
2378
2379 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2380                                             ir_node *right, ir_mode *mode);
2381
2382 static ir_node *create_assign_binop(const binary_expression_t *expression)
2383 {
2384         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2385         const expression_t *left_expr = expression->left;
2386         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2387         ir_node            *right     = expression_to_firm(expression->right);
2388         ir_node            *left_addr = expression_to_addr(left_expr);
2389         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2390         ir_node            *result    = create_op(dbgi, expression, left, right);
2391
2392         result = create_conv(dbgi, result, left_mode);
2393         result = do_strict_conv(dbgi, result);
2394
2395         set_value_for_expression_addr(left_expr, result, left_addr);
2396
2397         return result;
2398 }
2399
2400 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2401 {
2402         expression_kind_t kind = expression->base.kind;
2403
2404         switch(kind) {
2405         case EXPR_BINARY_EQUAL:
2406         case EXPR_BINARY_NOTEQUAL:
2407         case EXPR_BINARY_LESS:
2408         case EXPR_BINARY_LESSEQUAL:
2409         case EXPR_BINARY_GREATER:
2410         case EXPR_BINARY_GREATEREQUAL:
2411         case EXPR_BINARY_ISGREATER:
2412         case EXPR_BINARY_ISGREATEREQUAL:
2413         case EXPR_BINARY_ISLESS:
2414         case EXPR_BINARY_ISLESSEQUAL:
2415         case EXPR_BINARY_ISLESSGREATER:
2416         case EXPR_BINARY_ISUNORDERED: {
2417                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2418                 ir_node *left  = expression_to_firm(expression->left);
2419                 ir_node *right = expression_to_firm(expression->right);
2420                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2421                 long     pnc   = get_pnc(kind, expression->left->base.type);
2422                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2423                 return proj;
2424         }
2425         case EXPR_BINARY_ASSIGN: {
2426                 ir_node *addr  = expression_to_addr(expression->left);
2427                 ir_node *right = expression_to_firm(expression->right);
2428                 set_value_for_expression_addr(expression->left, right, addr);
2429
2430                 return right;
2431         }
2432         case EXPR_BINARY_ADD:
2433         case EXPR_BINARY_SUB:
2434         case EXPR_BINARY_MUL:
2435         case EXPR_BINARY_DIV:
2436         case EXPR_BINARY_MOD:
2437         case EXPR_BINARY_BITWISE_AND:
2438         case EXPR_BINARY_BITWISE_OR:
2439         case EXPR_BINARY_BITWISE_XOR:
2440         case EXPR_BINARY_SHIFTLEFT:
2441         case EXPR_BINARY_SHIFTRIGHT:
2442         {
2443                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2444                 ir_node  *left  = expression_to_firm(expression->left);
2445                 ir_node  *right = expression_to_firm(expression->right);
2446                 return create_op(dbgi, expression, left, right);
2447         }
2448         case EXPR_BINARY_LOGICAL_AND:
2449         case EXPR_BINARY_LOGICAL_OR:
2450                 return create_lazy_op(expression);
2451         case EXPR_BINARY_COMMA:
2452                 /* create side effects of left side */
2453                 (void) expression_to_firm(expression->left);
2454                 return _expression_to_firm(expression->right);
2455
2456         case EXPR_BINARY_ADD_ASSIGN:
2457         case EXPR_BINARY_SUB_ASSIGN:
2458         case EXPR_BINARY_MUL_ASSIGN:
2459         case EXPR_BINARY_MOD_ASSIGN:
2460         case EXPR_BINARY_DIV_ASSIGN:
2461         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2462         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2463         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2464         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2465         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2466                 return create_assign_binop(expression);
2467         case EXPR_BINARY_BUILTIN_EXPECT:
2468                 return _expression_to_firm(expression->left);
2469         default:
2470                 panic("TODO binexpr type");
2471         }
2472 }
2473
2474 static ir_node *array_access_addr(const array_access_expression_t *expression)
2475 {
2476         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2477         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2478         ir_node  *offset    = expression_to_firm(expression->index);
2479
2480         type_t  *offset_type = skip_typeref(expression->index->base.type);
2481         ir_mode *mode;
2482         if (is_type_signed(offset_type)) {
2483                 mode = get_ir_mode(type_ssize_t);
2484         } else {
2485                 mode = get_ir_mode(type_size_t);
2486         }
2487         offset = create_conv(dbgi, offset, mode);
2488
2489         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2490         assert(is_type_pointer(ref_type));
2491         pointer_type_t *pointer_type = &ref_type->pointer;
2492
2493         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2494         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2495         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2496                                              mode);
2497         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2498
2499         return result;
2500 }
2501
2502 static ir_node *array_access_to_firm(
2503                 const array_access_expression_t *expression)
2504 {
2505         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2506         ir_node  *addr   = array_access_addr(expression);
2507         type_t   *type   = revert_automatic_type_conversion(
2508                         (const expression_t*) expression);
2509         type             = skip_typeref(type);
2510
2511         return deref_address(dbgi, type, addr);
2512 }
2513
2514 static long get_offsetof_offset(const offsetof_expression_t *expression)
2515 {
2516         type_t *orig_type = expression->type;
2517         long    offset    = 0;
2518
2519         designator_t *designator = expression->designator;
2520         for( ; designator != NULL; designator = designator->next) {
2521                 type_t *type = skip_typeref(orig_type);
2522                 /* be sure the type is constructed */
2523                 (void) get_ir_type(type);
2524
2525                 if (designator->symbol != NULL) {
2526                         assert(is_type_compound(type));
2527                         symbol_t *symbol = designator->symbol;
2528
2529                         declaration_t *declaration = type->compound.declaration;
2530                         declaration_t *iter        = declaration->scope.declarations;
2531                         for( ; iter != NULL; iter = iter->next) {
2532                                 if (iter->symbol == symbol) {
2533                                         break;
2534                                 }
2535                         }
2536                         assert(iter != NULL);
2537
2538                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2539                         offset += get_entity_offset(iter->v.entity);
2540
2541                         orig_type = iter->type;
2542                 } else {
2543                         expression_t *array_index = designator->array_index;
2544                         assert(designator->array_index != NULL);
2545                         assert(is_type_array(type));
2546
2547                         long index         = fold_constant(array_index);
2548                         ir_type *arr_type  = get_ir_type(type);
2549                         ir_type *elem_type = get_array_element_type(arr_type);
2550                         long     elem_size = get_type_size_bytes(elem_type);
2551
2552                         offset += index * elem_size;
2553
2554                         orig_type = type->array.element_type;
2555                 }
2556         }
2557
2558         return offset;
2559 }
2560
2561 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2562 {
2563         ir_mode  *mode   = get_ir_mode(expression->base.type);
2564         long      offset = get_offsetof_offset(expression);
2565         tarval   *tv     = new_tarval_from_long(offset, mode);
2566         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2567
2568         return new_d_Const(dbgi, mode, tv);
2569 }
2570
2571 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2572                                      ir_entity *entity, type_t *type);
2573
2574 static ir_node *compound_literal_to_firm(
2575                 const compound_literal_expression_t *expression)
2576 {
2577         type_t *type = expression->type;
2578
2579         /* create an entity on the stack */
2580         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2581
2582         ident     *const id     = id_unique("CompLit.%u");
2583         ir_type   *const irtype = get_ir_type(type);
2584         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2585         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2586         set_entity_ld_ident(entity, id);
2587
2588         set_entity_variability(entity, variability_uninitialized);
2589
2590         /* create initialisation code */
2591         initializer_t *initializer = expression->initializer;
2592         create_local_initializer(initializer, dbgi, entity, type);
2593
2594         /* create a sel for the compound literal address */
2595         ir_node *frame = get_local_frame(entity);
2596         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2597         return sel;
2598 }
2599
2600 /**
2601  * Transform a sizeof expression into Firm code.
2602  */
2603 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2604 {
2605         type_t *type = expression->type;
2606         if (type == NULL) {
2607                 type = expression->tp_expression->base.type;
2608                 assert(type != NULL);
2609         }
2610
2611         type = skip_typeref(type);
2612         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2613         if (is_type_array(type) && type->array.is_vla
2614                         && expression->tp_expression != NULL) {
2615                 expression_to_firm(expression->tp_expression);
2616         }
2617
2618         return get_type_size(type);
2619 }
2620
2621 /**
2622  * Transform an alignof expression into Firm code.
2623  */
2624 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2625 {
2626         type_t *type = expression->type;
2627         if (type == NULL) {
2628                 /* beware: if expression is a variable reference, return the
2629                    alignment of the variable. */
2630                 const expression_t *tp_expression = expression->tp_expression;
2631                 const declaration_t *declaration = expr_is_variable(tp_expression);
2632                 if (declaration != NULL) {
2633                         /* TODO: get the alignment of this variable. */
2634                 }
2635                 type = tp_expression->base.type;
2636                 assert(type != NULL);
2637         }
2638
2639         ir_mode *const mode = get_ir_mode(expression->base.type);
2640         symconst_symbol sym;
2641         sym.type_p = get_ir_type(type);
2642         return new_SymConst(mode, sym, symconst_type_align);
2643 }
2644
2645 static void init_ir_types(void);
2646
2647 long fold_constant(const expression_t *expression)
2648 {
2649         assert(is_type_valid(skip_typeref(expression->base.type)));
2650
2651         bool constant_folding_old = constant_folding;
2652         constant_folding = true;
2653
2654         init_ir_types();
2655
2656         assert(is_constant_expression(expression));
2657
2658         ir_graph *old_current_ir_graph = current_ir_graph;
2659         if (current_ir_graph == NULL) {
2660                 current_ir_graph = get_const_code_irg();
2661         }
2662
2663         ir_node *cnst = expression_to_firm(expression);
2664         current_ir_graph = old_current_ir_graph;
2665
2666         if (!is_Const(cnst)) {
2667                 panic("couldn't fold constant\n");
2668         }
2669
2670         tarval *tv = get_Const_tarval(cnst);
2671         if (!tarval_is_long(tv)) {
2672                 panic("result of constant folding is not integer\n");
2673         }
2674
2675         constant_folding = constant_folding_old;
2676
2677         return get_tarval_long(tv);
2678 }
2679
2680 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2681 {
2682         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2683
2684         /* first try to fold a constant condition */
2685         if (is_constant_expression(expression->condition)) {
2686                 long val = fold_constant(expression->condition);
2687                 if (val) {
2688                         expression_t *true_expression = expression->true_expression;
2689                         if (true_expression == NULL)
2690                                 true_expression = expression->condition;
2691                         return expression_to_firm(true_expression);
2692                 } else {
2693                         return expression_to_firm(expression->false_expression);
2694                 }
2695         }
2696
2697         ir_node *cur_block   = get_cur_block();
2698
2699         /* create the true block */
2700         ir_node *true_block  = new_immBlock();
2701
2702         ir_node *true_val = expression->true_expression != NULL ?
2703                 expression_to_firm(expression->true_expression) : NULL;
2704         ir_node *true_jmp = new_Jmp();
2705
2706         /* create the false block */
2707         ir_node *false_block = new_immBlock();
2708
2709         ir_node *false_val = expression_to_firm(expression->false_expression);
2710         ir_node *false_jmp = new_Jmp();
2711
2712         /* create the condition evaluation */
2713         set_cur_block(cur_block);
2714         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2715         if (expression->true_expression == NULL) {
2716                 if (cond_expr != NULL) {
2717                         true_val = cond_expr;
2718                 } else {
2719                         /* Condition ended with a short circuit (&&, ||, !) operation.
2720                          * Generate a "1" as value for the true branch. */
2721                         ir_mode *const mode = mode_Is;
2722                         true_val = new_Const(mode, get_mode_one(mode));
2723                 }
2724         }
2725         mature_immBlock(true_block);
2726         mature_immBlock(false_block);
2727
2728         /* create the common block */
2729         ir_node *in_cf[2] = { true_jmp, false_jmp };
2730         new_Block(2, in_cf);
2731
2732         /* TODO improve static semantics, so either both or no values are NULL */
2733         if (true_val == NULL || false_val == NULL)
2734                 return NULL;
2735
2736         ir_node *in[2] = { true_val, false_val };
2737         ir_mode *mode  = get_irn_mode(true_val);
2738         assert(get_irn_mode(false_val) == mode);
2739         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2740
2741         return val;
2742 }
2743
2744 /**
2745  * Returns an IR-node representing the address of a field.
2746  */
2747 static ir_node *select_addr(const select_expression_t *expression)
2748 {
2749         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2750
2751         ir_node *compound_addr = expression_to_firm(expression->compound);
2752
2753         /* make sure the type is constructed */
2754         type_t *type = skip_typeref(expression->compound->base.type);
2755         if (is_type_pointer(type)) {
2756                 type = type->pointer.points_to;
2757         }
2758         (void) get_ir_type(type);
2759
2760         declaration_t *entry = expression->compound_entry;
2761         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2762         ir_entity     *entity = entry->v.entity;
2763
2764         assert(entity != NULL);
2765
2766         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2767
2768         return sel;
2769 }
2770
2771 static ir_node *select_to_firm(const select_expression_t *expression)
2772 {
2773         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2774         ir_node  *addr = select_addr(expression);
2775         type_t   *type = revert_automatic_type_conversion(
2776                         (const expression_t*) expression);
2777         type           = skip_typeref(type);
2778
2779         declaration_t *entry      = expression->compound_entry;
2780         type_t        *entry_type = skip_typeref(entry->type);
2781
2782         if (entry_type->kind == TYPE_BITFIELD) {
2783                 return bitfield_extract_to_firm(expression, addr);
2784         }
2785
2786         return deref_address(dbgi, type, addr);
2787 }
2788
2789 /* Values returned by __builtin_classify_type. */
2790 typedef enum gcc_type_class
2791 {
2792         no_type_class = -1,
2793         void_type_class,
2794         integer_type_class,
2795         char_type_class,
2796         enumeral_type_class,
2797         boolean_type_class,
2798         pointer_type_class,
2799         reference_type_class,
2800         offset_type_class,
2801         real_type_class,
2802         complex_type_class,
2803         function_type_class,
2804         method_type_class,
2805         record_type_class,
2806         union_type_class,
2807         array_type_class,
2808         string_type_class,
2809         set_type_class,
2810         file_type_class,
2811         lang_type_class
2812 } gcc_type_class;
2813
2814 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2815 {
2816         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2817
2818         gcc_type_class tc;
2819         switch (type->kind)
2820         {
2821                 case TYPE_ATOMIC: {
2822                         const atomic_type_t *const atomic_type = &type->atomic;
2823                         switch (atomic_type->akind) {
2824                                 /* should not be reached */
2825                                 case ATOMIC_TYPE_INVALID:
2826                                         tc = no_type_class;
2827                                         goto make_const;
2828
2829                                 /* gcc cannot do that */
2830                                 case ATOMIC_TYPE_VOID:
2831                                         tc = void_type_class;
2832                                         goto make_const;
2833
2834                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2835                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2836                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2837                                 case ATOMIC_TYPE_SHORT:
2838                                 case ATOMIC_TYPE_USHORT:
2839                                 case ATOMIC_TYPE_INT:
2840                                 case ATOMIC_TYPE_UINT:
2841                                 case ATOMIC_TYPE_LONG:
2842                                 case ATOMIC_TYPE_ULONG:
2843                                 case ATOMIC_TYPE_LONGLONG:
2844                                 case ATOMIC_TYPE_ULONGLONG:
2845                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2846                                         tc = integer_type_class;
2847                                         goto make_const;
2848
2849                                 case ATOMIC_TYPE_FLOAT:
2850                                 case ATOMIC_TYPE_DOUBLE:
2851                                 case ATOMIC_TYPE_LONG_DOUBLE:
2852                                         tc = real_type_class;
2853                                         goto make_const;
2854                         }
2855                         panic("Unexpected atomic type in classify_type_to_firm().");
2856                 }
2857
2858                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2859                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2860                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2861                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2862                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2863                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2864                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2865                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2866
2867                 /* gcc handles this as integer */
2868                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2869
2870                 case TYPE_BUILTIN:
2871                 /* typedef/typeof should be skipped already */
2872                 case TYPE_TYPEDEF:
2873                 case TYPE_TYPEOF:
2874                 case TYPE_INVALID:
2875                 case TYPE_ERROR:
2876                         break;
2877         }
2878         panic("unexpected TYPE classify_type_to_firm().");
2879
2880 make_const: ;
2881         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2882         ir_mode  *const mode = mode_int;
2883         tarval   *const tv   = new_tarval_from_long(tc, mode);
2884         return new_d_Const(dbgi, mode, tv);
2885 }
2886
2887 static ir_node *function_name_to_firm(
2888                 const funcname_expression_t *const expr)
2889 {
2890         switch(expr->kind) {
2891         case FUNCNAME_FUNCTION:
2892         case FUNCNAME_PRETTY_FUNCTION:
2893         case FUNCNAME_FUNCDNAME:
2894                 if (current_function_name == NULL) {
2895                         const source_position_t *const src_pos = &expr->base.source_position;
2896                         const char *const name = current_function_decl->symbol->string;
2897                         const string_t string = { name, strlen(name) + 1 };
2898                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2899                 }
2900                 return current_function_name;
2901         case FUNCNAME_FUNCSIG:
2902                 if (current_funcsig == NULL) {
2903                         const source_position_t *const src_pos = &expr->base.source_position;
2904                         ir_entity *ent = get_irg_entity(current_ir_graph);
2905                         const char *const name = get_entity_ld_name(ent);
2906                         const string_t string = { name, strlen(name) + 1 };
2907                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2908                 }
2909                 return current_funcsig;
2910         }
2911         panic("Unsupported function name");
2912 }
2913
2914 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2915 {
2916         statement_t *statement = expr->statement;
2917
2918         assert(statement->kind == STATEMENT_COMPOUND);
2919         return compound_statement_to_firm(&statement->compound);
2920 }
2921
2922 static ir_node *va_start_expression_to_firm(
2923         const va_start_expression_t *const expr)
2924 {
2925         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2926         int        const n           = get_method_n_params(method_type) - 1;
2927         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2928         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2929         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2930         ir_node   *const no_mem      = new_NoMem();
2931         ir_node   *const arg_sel     =
2932                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2933
2934         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2935         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2936         set_value_for_expression(expr->ap, add);
2937
2938         return NULL;
2939 }
2940
2941 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2942 {
2943         type_t       *const type    = expr->base.type;
2944         expression_t *const ap_expr = expr->ap;
2945         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2946         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2947         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2948         ir_node      *const res     = deref_address(dbgi, type, ap);
2949
2950         ir_node      *const cnst    = get_type_size(expr->base.type);
2951         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2952
2953         set_value_for_expression_addr(ap_expr, add, ap_addr);
2954
2955         return res;
2956 }
2957
2958 static ir_node *dereference_addr(const unary_expression_t *const expression)
2959 {
2960         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2961         return expression_to_firm(expression->value);
2962 }
2963
2964 /**
2965  * Returns a IR-node representing an lvalue of the given expression.
2966  */
2967 static ir_node *expression_to_addr(const expression_t *expression)
2968 {
2969         switch(expression->kind) {
2970         case EXPR_REFERENCE:
2971                 return reference_addr(&expression->reference);
2972         case EXPR_ARRAY_ACCESS:
2973                 return array_access_addr(&expression->array_access);
2974         case EXPR_SELECT:
2975                 return select_addr(&expression->select);
2976         case EXPR_CALL:
2977                 return call_expression_to_firm(&expression->call);
2978         case EXPR_UNARY_DEREFERENCE: {
2979                 return dereference_addr(&expression->unary);
2980         }
2981         default:
2982                 break;
2983         }
2984         panic("trying to get address of non-lvalue");
2985 }
2986
2987 static ir_node *builtin_constant_to_firm(
2988                 const builtin_constant_expression_t *expression)
2989 {
2990         ir_mode *mode = get_ir_mode(expression->base.type);
2991         long     v;
2992
2993         if (is_constant_expression(expression->value)) {
2994                 v = 1;
2995         } else {
2996                 v = 0;
2997         }
2998         return new_Const_long(mode, v);
2999 }
3000
3001 static ir_node *builtin_prefetch_to_firm(
3002                 const builtin_prefetch_expression_t *expression)
3003 {
3004         ir_node *adr = expression_to_firm(expression->adr);
3005         /* no Firm support for prefetch yet */
3006         (void) adr;
3007         return NULL;
3008 }
3009
3010 static ir_node *get_label_block(declaration_t *label)
3011 {
3012         assert(label->namespc == NAMESPACE_LABEL || label->namespc == NAMESPACE_LOCAL_LABEL);
3013
3014         if (label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
3015                 return label->v.block;
3016         }
3017         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
3018
3019         /* beware: might be called from create initializer with current_ir_graph
3020          * set to const_code_irg. */
3021         ir_graph *rem    = current_ir_graph;
3022         current_ir_graph = current_function;
3023
3024         ir_node *old_cur_block = get_cur_block();
3025         ir_node *block         = new_immBlock();
3026         set_cur_block(old_cur_block);
3027
3028         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
3029         label->v.block          = block;
3030
3031         ARR_APP1(declaration_t *, all_labels, label);
3032
3033         current_ir_graph = rem;
3034         return block;
3035 }
3036
3037 /**
3038  * Pointer to a label.  This is used for the
3039  * GNU address-of-label extension.
3040  */
3041 static ir_node *label_address_to_firm(
3042                 const label_address_expression_t *label)
3043 {
3044         ir_node    *block = get_label_block(label->declaration);
3045         ir_label_t  nr    = get_Block_label(block);
3046
3047         if (nr == 0) {
3048                 nr = get_irp_next_label_nr();
3049                 set_Block_label(block, nr);
3050         }
3051         symconst_symbol value;
3052         value.label = nr;
3053         return new_SymConst(mode_P_code, value, symconst_label);
3054 }
3055
3056 /**
3057  * creates firm nodes for an expression. The difference between this function
3058  * and expression_to_firm is, that this version might produce mode_b nodes
3059  * instead of mode_Is.
3060  */
3061 static ir_node *_expression_to_firm(const expression_t *expression)
3062 {
3063 #ifndef NDEBUG
3064         if (!constant_folding) {
3065                 assert(!expression->base.transformed);
3066                 ((expression_t*) expression)->base.transformed = true;
3067         }
3068 #endif
3069
3070         switch (expression->kind) {
3071         case EXPR_CHARACTER_CONSTANT:
3072                 return character_constant_to_firm(&expression->conste);
3073         case EXPR_WIDE_CHARACTER_CONSTANT:
3074                 return wide_character_constant_to_firm(&expression->conste);
3075         case EXPR_CONST:
3076                 return const_to_firm(&expression->conste);
3077         case EXPR_STRING_LITERAL:
3078                 return string_literal_to_firm(&expression->string);
3079         case EXPR_WIDE_STRING_LITERAL:
3080                 return wide_string_literal_to_firm(&expression->wide_string);
3081         case EXPR_REFERENCE:
3082                 return reference_expression_to_firm(&expression->reference);
3083         case EXPR_CALL:
3084                 return call_expression_to_firm(&expression->call);
3085         EXPR_UNARY_CASES
3086                 return unary_expression_to_firm(&expression->unary);
3087         EXPR_BINARY_CASES
3088                 return binary_expression_to_firm(&expression->binary);
3089         case EXPR_ARRAY_ACCESS:
3090                 return array_access_to_firm(&expression->array_access);
3091         case EXPR_SIZEOF:
3092                 return sizeof_to_firm(&expression->typeprop);
3093         case EXPR_ALIGNOF:
3094                 return alignof_to_firm(&expression->typeprop);
3095         case EXPR_CONDITIONAL:
3096                 return conditional_to_firm(&expression->conditional);
3097         case EXPR_SELECT:
3098                 return select_to_firm(&expression->select);
3099         case EXPR_CLASSIFY_TYPE:
3100                 return classify_type_to_firm(&expression->classify_type);
3101         case EXPR_FUNCNAME:
3102                 return function_name_to_firm(&expression->funcname);
3103         case EXPR_STATEMENT:
3104                 return statement_expression_to_firm(&expression->statement);
3105         case EXPR_VA_START:
3106                 return va_start_expression_to_firm(&expression->va_starte);
3107         case EXPR_VA_ARG:
3108                 return va_arg_expression_to_firm(&expression->va_arge);
3109         case EXPR_BUILTIN_SYMBOL:
3110                 panic("unimplemented expression found");
3111         case EXPR_BUILTIN_CONSTANT_P:
3112                 return builtin_constant_to_firm(&expression->builtin_constant);
3113         case EXPR_BUILTIN_PREFETCH:
3114                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3115         case EXPR_OFFSETOF:
3116                 return offsetof_to_firm(&expression->offsetofe);
3117         case EXPR_COMPOUND_LITERAL:
3118                 return compound_literal_to_firm(&expression->compound_literal);
3119         case EXPR_LABEL_ADDRESS:
3120                 return label_address_to_firm(&expression->label_address);
3121
3122         case EXPR_UNKNOWN:
3123         case EXPR_INVALID:
3124                 break;
3125         }
3126         panic("invalid expression found");
3127 }
3128
3129 static bool produces_mode_b(const expression_t *expression)
3130 {
3131         switch (expression->kind) {
3132         case EXPR_BINARY_EQUAL:
3133         case EXPR_BINARY_NOTEQUAL:
3134         case EXPR_BINARY_LESS:
3135         case EXPR_BINARY_LESSEQUAL:
3136         case EXPR_BINARY_GREATER:
3137         case EXPR_BINARY_GREATEREQUAL:
3138         case EXPR_BINARY_ISGREATER:
3139         case EXPR_BINARY_ISGREATEREQUAL:
3140         case EXPR_BINARY_ISLESS:
3141         case EXPR_BINARY_ISLESSEQUAL:
3142         case EXPR_BINARY_ISLESSGREATER:
3143         case EXPR_BINARY_ISUNORDERED:
3144         case EXPR_UNARY_NOT:
3145                 return true;
3146
3147         case EXPR_BINARY_BUILTIN_EXPECT:
3148                 return produces_mode_b(expression->binary.left);
3149         case EXPR_BINARY_COMMA:
3150                 return produces_mode_b(expression->binary.right);
3151
3152         default:
3153                 return false;
3154         }
3155 }
3156
3157 static ir_node *expression_to_firm(const expression_t *expression)
3158 {
3159         if (!produces_mode_b(expression)) {
3160                 ir_node *res = _expression_to_firm(expression);
3161                 assert(res == NULL || get_irn_mode(res) != mode_b);
3162                 return res;
3163         }
3164
3165         if (is_constant_expression(expression)) {
3166                 ir_node *res  = _expression_to_firm(expression);
3167                 ir_mode *mode = get_ir_mode(expression->base.type);
3168                 assert(is_Const(res));
3169                 if (is_Const_null(res)) {
3170                         return new_Const_long(mode, 0);
3171                 } else {
3172                         return new_Const_long(mode, 1);
3173                 }
3174         }
3175
3176         /* we have to produce a 0/1 from the mode_b expression */
3177         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3178         return produce_condition_result(expression, dbgi);
3179 }
3180
3181 /**
3182  * create a short-circuit expression evaluation that tries to construct
3183  * efficient control flow structures for &&, || and ! expressions
3184  */
3185 static ir_node *create_condition_evaluation(const expression_t *expression,
3186                                             ir_node *true_block,
3187                                             ir_node *false_block)
3188 {
3189         switch(expression->kind) {
3190         case EXPR_UNARY_NOT: {
3191                 const unary_expression_t *unary_expression = &expression->unary;
3192                 create_condition_evaluation(unary_expression->value, false_block,
3193                                             true_block);
3194                 return NULL;
3195         }
3196         case EXPR_BINARY_LOGICAL_AND: {
3197                 const binary_expression_t *binary_expression = &expression->binary;
3198
3199                 ir_node *cur_block   = get_cur_block();
3200                 ir_node *extra_block = new_immBlock();
3201                 set_cur_block(cur_block);
3202                 create_condition_evaluation(binary_expression->left, extra_block,
3203                                             false_block);
3204                 mature_immBlock(extra_block);
3205                 set_cur_block(extra_block);
3206                 create_condition_evaluation(binary_expression->right, true_block,
3207                                             false_block);
3208                 return NULL;
3209         }
3210         case EXPR_BINARY_LOGICAL_OR: {
3211                 const binary_expression_t *binary_expression = &expression->binary;
3212
3213                 ir_node *cur_block   = get_cur_block();
3214                 ir_node *extra_block = new_immBlock();
3215                 set_cur_block(cur_block);
3216                 create_condition_evaluation(binary_expression->left, true_block,
3217                                             extra_block);
3218                 mature_immBlock(extra_block);
3219                 set_cur_block(extra_block);
3220                 create_condition_evaluation(binary_expression->right, true_block,
3221                                             false_block);
3222                 return NULL;
3223         }
3224         default:
3225                 break;
3226         }
3227
3228         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3229         ir_node  *cond_expr  = _expression_to_firm(expression);
3230         ir_node  *condition  = create_conv(NULL, cond_expr, mode_b);
3231         ir_node  *cond       = new_d_Cond(dbgi, condition);
3232         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3233         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3234
3235         /* set branch prediction info based on __builtin_expect */
3236         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3237                 long               cnst = fold_constant(expression->binary.right);
3238                 cond_jmp_predicate pred;
3239
3240                 if (cnst == 0) {
3241                         pred = COND_JMP_PRED_FALSE;
3242                 } else {
3243                         pred = COND_JMP_PRED_TRUE;
3244                 }
3245                 set_Cond_jmp_pred(cond, pred);
3246         }
3247
3248         add_immBlock_pred(true_block, true_proj);
3249         if (false_block != NULL) {
3250                 add_immBlock_pred(false_block, false_proj);
3251         }
3252
3253         set_cur_block(NULL);
3254         return cond_expr;
3255 }
3256
3257
3258
3259 static void create_declaration_entity(declaration_t *declaration,
3260                                       declaration_kind_t declaration_kind,
3261                                       ir_type *parent_type)
3262 {
3263         type_t    *const type   = skip_typeref(declaration->type);
3264         if (is_type_function(type)) {
3265                 (void) get_function_entity(declaration);
3266                 return;
3267         }
3268
3269         ident     *const id     = new_id_from_str(declaration->symbol->string);
3270         ir_type   *const irtype = get_ir_type(type);
3271         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
3272         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
3273
3274         handle_gnu_attributes_ent(entity, declaration);
3275
3276         declaration->declaration_kind = (unsigned char) declaration_kind;
3277         declaration->v.entity         = entity;
3278         set_entity_variability(entity, variability_uninitialized);
3279         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3280         if (parent_type == get_tls_type())
3281                 set_entity_allocation(entity, allocation_automatic);
3282         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3283                 set_entity_allocation(entity, allocation_static);
3284
3285         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3286                 set_entity_volatility(entity, volatility_is_volatile);
3287         }
3288 }
3289
3290
3291 typedef struct type_path_entry_t type_path_entry_t;
3292 struct type_path_entry_t {
3293         type_t           *type;
3294         ir_initializer_t *initializer;
3295         size_t            index;
3296         declaration_t    *compound_entry;
3297 };
3298
3299 typedef struct type_path_t type_path_t;
3300 struct type_path_t {
3301         type_path_entry_t *path;
3302         type_t            *top_type;
3303         bool               invalid;
3304 };
3305
3306 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3307 {
3308         size_t len = ARR_LEN(path->path);
3309
3310         for(size_t i = 0; i < len; ++i) {
3311                 const type_path_entry_t *entry = & path->path[i];
3312
3313                 type_t *type = skip_typeref(entry->type);
3314                 if (is_type_compound(type)) {
3315                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
3316                 } else if (is_type_array(type)) {
3317                         fprintf(stderr, "[%zd]", entry->index);
3318                 } else {
3319                         fprintf(stderr, "-INVALID-");
3320                 }
3321         }
3322         fprintf(stderr, "  (");
3323         print_type(path->top_type);
3324         fprintf(stderr, ")");
3325 }
3326
3327 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3328 {
3329         size_t len = ARR_LEN(path->path);
3330         assert(len > 0);
3331         return & path->path[len-1];
3332 }
3333
3334 static type_path_entry_t *append_to_type_path(type_path_t *path)
3335 {
3336         size_t len = ARR_LEN(path->path);
3337         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3338
3339         type_path_entry_t *result = & path->path[len];
3340         memset(result, 0, sizeof(result[0]));
3341         return result;
3342 }
3343
3344 static size_t get_compound_size(const compound_type_t *type)
3345 {
3346         declaration_t *declaration = type->declaration;
3347         declaration_t *member      = declaration->scope.declarations;
3348         size_t         size        = 0;
3349         for( ; member != NULL; member = member->next) {
3350                 ++size;
3351         }
3352         /* TODO: cache results? */
3353
3354         return size;
3355 }
3356
3357 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3358 {
3359         type_t *orig_top_type = path->top_type;
3360         type_t *top_type      = skip_typeref(orig_top_type);
3361
3362         assert(is_type_compound(top_type) || is_type_array(top_type));
3363
3364         if (ARR_LEN(path->path) == 0) {
3365                 return NULL;
3366         } else {
3367                 type_path_entry_t *top         = get_type_path_top(path);
3368                 ir_initializer_t  *initializer = top->initializer;
3369                 return get_initializer_compound_value(initializer, top->index);
3370         }
3371 }
3372
3373 static void descend_into_subtype(type_path_t *path)
3374 {
3375         type_t *orig_top_type = path->top_type;
3376         type_t *top_type      = skip_typeref(orig_top_type);
3377
3378         assert(is_type_compound(top_type) || is_type_array(top_type));
3379
3380         ir_initializer_t *initializer = get_initializer_entry(path);
3381
3382         type_path_entry_t *top = append_to_type_path(path);
3383         top->type              = top_type;
3384
3385         size_t len;
3386
3387         if (is_type_compound(top_type)) {
3388                 declaration_t *declaration = top_type->compound.declaration;
3389                 declaration_t *entry       = declaration->scope.declarations;
3390
3391                 top->compound_entry = entry;
3392                 top->index          = 0;
3393                 len                 = get_compound_size(&top_type->compound);
3394                 if (entry != NULL)
3395                         path->top_type = entry->type;
3396         } else {
3397                 assert(is_type_array(top_type));
3398                 assert(top_type->array.size > 0);
3399
3400                 top->index     = 0;
3401                 path->top_type = top_type->array.element_type;
3402                 len            = top_type->array.size;
3403         }
3404         if (initializer == NULL
3405                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3406                 initializer = create_initializer_compound(len);
3407                 /* we have to set the entry at the 2nd latest path entry... */
3408                 size_t path_len = ARR_LEN(path->path);
3409                 assert(path_len >= 1);
3410                 if (path_len > 1) {
3411                         type_path_entry_t *entry        = & path->path[path_len-2];
3412                         ir_initializer_t  *tinitializer = entry->initializer;
3413                         set_initializer_compound_value(tinitializer, entry->index,
3414                                                        initializer);
3415                 }
3416         }
3417         top->initializer = initializer;
3418 }
3419
3420 static void ascend_from_subtype(type_path_t *path)
3421 {
3422         type_path_entry_t *top = get_type_path_top(path);
3423
3424         path->top_type = top->type;
3425
3426         size_t len = ARR_LEN(path->path);
3427         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3428 }
3429
3430 static void walk_designator(type_path_t *path, const designator_t *designator)
3431 {
3432         /* designators start at current object type */
3433         ARR_RESIZE(type_path_entry_t, path->path, 1);
3434
3435         for( ; designator != NULL; designator = designator->next) {
3436                 type_path_entry_t *top         = get_type_path_top(path);
3437                 type_t            *orig_type   = top->type;
3438                 type_t            *type        = skip_typeref(orig_type);
3439
3440                 if (designator->symbol != NULL) {
3441                         assert(is_type_compound(type));
3442                         size_t    index  = 0;
3443                         symbol_t *symbol = designator->symbol;
3444
3445                         declaration_t *declaration = type->compound.declaration;
3446                         declaration_t *iter        = declaration->scope.declarations;
3447                         for( ; iter != NULL; iter = iter->next, ++index) {
3448                                 if (iter->symbol == symbol) {
3449                                         break;
3450                                 }
3451                         }
3452                         assert(iter != NULL);
3453
3454                         top->type           = orig_type;
3455                         top->compound_entry = iter;
3456                         top->index          = index;
3457                         orig_type           = iter->type;
3458                 } else {
3459                         expression_t *array_index = designator->array_index;
3460                         assert(designator->array_index != NULL);
3461                         assert(is_type_array(type));
3462
3463                         long index = fold_constant(array_index);
3464                         assert(index >= 0);
3465 #ifndef NDEBUG
3466                         if (type->array.size_constant) {
3467                                 long array_size = type->array.size;
3468                                 assert(index < array_size);
3469                         }
3470 #endif
3471
3472                         top->type  = orig_type;
3473                         top->index = (size_t) index;
3474                         orig_type  = type->array.element_type;
3475                 }
3476                 path->top_type = orig_type;
3477
3478                 if (designator->next != NULL) {
3479                         descend_into_subtype(path);
3480                 }
3481         }
3482
3483         path->invalid  = false;
3484 }
3485
3486 static void advance_current_object(type_path_t *path)
3487 {
3488         if (path->invalid) {
3489                 /* TODO: handle this... */
3490                 panic("invalid initializer in ast2firm (excessive elements)");
3491                 return;
3492         }
3493
3494         type_path_entry_t *top = get_type_path_top(path);
3495
3496         type_t *type = skip_typeref(top->type);
3497         if (is_type_union(type)) {
3498                 top->compound_entry = NULL;
3499         } else if (is_type_struct(type)) {
3500                 declaration_t *entry = top->compound_entry;
3501
3502                 top->index++;
3503                 entry               = entry->next;
3504                 top->compound_entry = entry;
3505                 if (entry != NULL) {
3506                         path->top_type = entry->type;
3507                         return;
3508                 }
3509         } else {
3510                 assert(is_type_array(type));
3511
3512                 top->index++;
3513                 if (!type->array.size_constant || top->index < type->array.size) {
3514                         return;
3515                 }
3516         }
3517
3518         /* we're past the last member of the current sub-aggregate, try if we
3519          * can ascend in the type hierarchy and continue with another subobject */
3520         size_t len = ARR_LEN(path->path);
3521
3522         if (len > 1) {
3523                 ascend_from_subtype(path);
3524                 advance_current_object(path);
3525         } else {
3526                 path->invalid = true;
3527         }
3528 }
3529
3530
3531 static ir_initializer_t *create_ir_initializer(
3532                 const initializer_t *initializer, type_t *type);
3533
3534 static ir_initializer_t *create_ir_initializer_value(
3535                 const initializer_value_t *initializer)
3536 {
3537         if (is_type_compound(initializer->value->base.type)) {
3538                 panic("initializer creation for compounds not implemented yet");
3539         }
3540         ir_node *value = expression_to_firm(initializer->value);
3541         return create_initializer_const(value);
3542 }
3543
3544 static ir_initializer_t *create_ir_initializer_list(
3545                 const initializer_list_t *initializer, type_t *type)
3546 {
3547         type_path_t path;
3548         memset(&path, 0, sizeof(path));
3549         path.top_type = type;
3550         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3551
3552         descend_into_subtype(&path);
3553
3554         for(size_t i = 0; i < initializer->len; ++i) {
3555                 const initializer_t *sub_initializer = initializer->initializers[i];
3556
3557                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3558                         walk_designator(&path, sub_initializer->designator.designator);
3559                         continue;
3560                 }
3561
3562                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3563                         /* we might have to descend into types until we're at a scalar
3564                          * type */
3565                         while(true) {
3566                                 type_t *orig_top_type = path.top_type;
3567                                 type_t *top_type      = skip_typeref(orig_top_type);
3568
3569                                 if (is_type_scalar(top_type))
3570                                         break;
3571                                 descend_into_subtype(&path);
3572                         }
3573                 }
3574
3575                 ir_initializer_t *sub_irinitializer
3576                         = create_ir_initializer(sub_initializer, path.top_type);
3577
3578                 size_t path_len = ARR_LEN(path.path);
3579                 assert(path_len >= 1);
3580                 type_path_entry_t *entry        = & path.path[path_len-1];
3581                 ir_initializer_t  *tinitializer = entry->initializer;
3582                 set_initializer_compound_value(tinitializer, entry->index,
3583                                                sub_irinitializer);
3584
3585                 advance_current_object(&path);
3586         }
3587
3588         assert(ARR_LEN(path.path) >= 1);
3589         ir_initializer_t *result = path.path[0].initializer;
3590         DEL_ARR_F(path.path);
3591
3592         return result;
3593 }
3594
3595 static ir_initializer_t *create_ir_initializer_string(
3596                 const initializer_string_t *initializer, type_t *type)
3597 {
3598         type = skip_typeref(type);
3599
3600         size_t            string_len    = initializer->string.size;
3601         assert(type->kind == TYPE_ARRAY);
3602         assert(type->array.size_constant);
3603         size_t            len           = type->array.size;
3604         ir_initializer_t *irinitializer = create_initializer_compound(len);
3605
3606         const char *string = initializer->string.begin;
3607         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3608
3609         for(size_t i = 0; i < len; ++i) {
3610                 char c = 0;
3611                 if (i < string_len)
3612                         c = string[i];
3613
3614                 tarval           *tv = new_tarval_from_long(c, mode);
3615                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3616
3617                 set_initializer_compound_value(irinitializer, i, char_initializer);
3618         }
3619
3620         return irinitializer;
3621 }
3622
3623 static ir_initializer_t *create_ir_initializer_wide_string(
3624                 const initializer_wide_string_t *initializer, type_t *type)
3625 {
3626         size_t            string_len    = initializer->string.size;
3627         assert(type->kind == TYPE_ARRAY);
3628         assert(type->array.size_constant);
3629         size_t            len           = type->array.size;
3630         ir_initializer_t *irinitializer = create_initializer_compound(len);
3631
3632         const wchar_rep_t *string = initializer->string.begin;
3633         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3634
3635         for(size_t i = 0; i < len; ++i) {
3636                 wchar_rep_t c = 0;
3637                 if (i < string_len) {
3638                         c = string[i];
3639                 }
3640                 tarval *tv = new_tarval_from_long(c, mode);
3641                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3642
3643                 set_initializer_compound_value(irinitializer, i, char_initializer);
3644         }
3645
3646         return irinitializer;
3647 }
3648
3649 static ir_initializer_t *create_ir_initializer(
3650                 const initializer_t *initializer, type_t *type)
3651 {
3652         switch(initializer->kind) {
3653                 case INITIALIZER_STRING:
3654                         return create_ir_initializer_string(&initializer->string, type);
3655
3656                 case INITIALIZER_WIDE_STRING:
3657                         return create_ir_initializer_wide_string(&initializer->wide_string,
3658                                                                  type);
3659
3660                 case INITIALIZER_LIST:
3661                         return create_ir_initializer_list(&initializer->list, type);
3662
3663                 case INITIALIZER_VALUE:
3664                         return create_ir_initializer_value(&initializer->value);
3665
3666                 case INITIALIZER_DESIGNATOR:
3667                         panic("unexpected designator initializer found");
3668         }
3669         panic("unknown initializer");
3670 }
3671
3672 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3673                 ir_node *base_addr)
3674 {
3675         if (is_atomic_type(type)) {
3676                 ir_mode *mode = get_type_mode(type);
3677                 tarval  *zero = get_mode_null(mode);
3678                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3679
3680                 /* TODO: bitfields */
3681                 ir_node *mem    = get_store();
3682                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3683                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3684                 set_store(proj_m);
3685         } else {
3686                 assert(is_compound_type(type));
3687
3688                 int n_members;
3689                 if (is_Array_type(type)) {
3690                         assert(has_array_upper_bound(type, 0));
3691                         n_members = get_array_upper_bound_int(type, 0);
3692                 } else {
3693                         n_members = get_compound_n_members(type);
3694                 }
3695
3696                 for(int i = 0; i < n_members; ++i) {
3697                         ir_node *addr;
3698                         ir_type *irtype;
3699                         if (is_Array_type(type)) {
3700                                 ir_entity *entity   = get_array_element_entity(type);
3701                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3702                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3703                                 ir_node   *in[1]    = { cnst };
3704                                 irtype = get_array_element_type(type);
3705                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3706                         } else {
3707                                 ir_entity *member = get_compound_member(type, i);
3708
3709                                 irtype = get_entity_type(member);
3710                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3711                         }
3712
3713                         create_dynamic_null_initializer(irtype, dbgi, addr);
3714                 }
3715         }
3716 }
3717
3718 static bool needs_bitfield_store(ir_entity *entity)
3719 {
3720         int bitoffset = get_entity_offset_bits_remainder(entity);
3721         if (bitoffset > 0)
3722                 return true;
3723
3724         ir_type *entity_type = get_entity_type(entity);
3725         int      bitsize     = get_mode_size_bits(get_type_mode(entity_type));
3726         if (!is_po2(bitsize) || bitsize < 8)
3727                 return true;
3728
3729         return false;
3730 }
3731
3732 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3733                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3734 {
3735         switch(get_initializer_kind(initializer)) {
3736         case IR_INITIALIZER_NULL: {
3737                 create_dynamic_null_initializer(type, dbgi, base_addr);
3738                 return;
3739         }
3740         case IR_INITIALIZER_CONST: {
3741                 ir_node *node = get_initializer_const_value(initializer);
3742                 ir_mode *mode = get_irn_mode(node);
3743
3744                 if (needs_bitfield_store(entity)) {
3745                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3746                         return;
3747                 }
3748
3749                 assert(get_type_mode(type) == mode);
3750                 ir_node *mem    = get_store();
3751                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3752                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3753                 set_store(proj_m);
3754                 return;
3755         }
3756         case IR_INITIALIZER_TARVAL: {
3757                 tarval  *tv   = get_initializer_tarval_value(initializer);
3758                 ir_mode *mode = get_tarval_mode(tv);
3759                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3760
3761                 if (needs_bitfield_store(entity)) {
3762                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3763                         return;
3764                 }
3765
3766                 assert(get_type_mode(type) == mode);
3767                 ir_node *mem    = get_store();
3768                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3769                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3770                 set_store(proj_m);
3771                 return;
3772         }
3773         case IR_INITIALIZER_COMPOUND: {
3774                 assert(is_compound_type(type));
3775                 int n_members;
3776                 if (is_Array_type(type)) {
3777                         assert(has_array_upper_bound(type, 0));
3778                         n_members = get_array_upper_bound_int(type, 0);
3779                 } else {
3780                         n_members = get_compound_n_members(type);
3781                 }
3782
3783                 if (get_initializer_compound_n_entries(initializer)
3784                                 != (unsigned) n_members)
3785                         panic("initializer doesn't match compound type");
3786
3787                 for(int i = 0; i < n_members; ++i) {
3788                         ir_node   *addr;
3789                         ir_type   *irtype;
3790                         ir_entity *sub_entity;
3791                         if (is_Array_type(type)) {
3792                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3793                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3794                                 ir_node   *in[1]    = { cnst };
3795                                 irtype     = get_array_element_type(type);
3796                                 sub_entity = get_array_element_entity(type);
3797                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3798                                                        sub_entity);
3799                         } else {
3800                                 sub_entity = get_compound_member(type, i);
3801                                 irtype     = get_entity_type(sub_entity);
3802                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3803                                                              sub_entity);
3804                         }
3805
3806                         ir_initializer_t *sub_init
3807                                 = get_initializer_compound_value(initializer, i);
3808
3809                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3810                                                        addr);
3811                 }
3812                 return;
3813         }
3814         }
3815
3816         panic("invalid IR_INITIALIZER found");
3817 }
3818
3819 static void create_dynamic_initializer(ir_initializer_t *initializer,
3820                 dbg_info *dbgi, ir_entity *entity)
3821 {
3822         ir_node *frame     = get_local_frame(entity);
3823         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3824         ir_type *type      = get_entity_type(entity);
3825
3826         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3827 }
3828
3829 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3830                                      ir_entity *entity, type_t *type)
3831 {
3832         ir_node *memory = get_store();
3833         ir_node *nomem  = new_NoMem();
3834         ir_node *frame  = get_irg_frame(current_ir_graph);
3835         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3836
3837         if (initializer->kind == INITIALIZER_VALUE) {
3838                 initializer_value_t *initializer_value = &initializer->value;
3839
3840                 ir_node *value = expression_to_firm(initializer_value->value);
3841                 type = skip_typeref(type);
3842                 assign_value(dbgi, addr, type, value);
3843                 return;
3844         }
3845
3846         if (!is_constant_initializer(initializer)) {
3847                 ir_initializer_t *irinitializer
3848                         = create_ir_initializer(initializer, type);
3849
3850                 create_dynamic_initializer(irinitializer, dbgi, entity);
3851                 return;
3852         }
3853
3854         /* create the ir_initializer */
3855         ir_graph *const old_current_ir_graph = current_ir_graph;
3856         current_ir_graph = get_const_code_irg();
3857
3858         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3859
3860         assert(current_ir_graph == get_const_code_irg());
3861         current_ir_graph = old_current_ir_graph;
3862
3863         /* create a "template" entity which is copied to the entity on the stack */
3864         ident     *const id          = id_unique("initializer.%u");
3865         ir_type   *const irtype      = get_ir_type(type);
3866         ir_type   *const global_type = get_glob_type();
3867         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3868         set_entity_ld_ident(init_entity, id);
3869
3870         set_entity_variability(init_entity, variability_initialized);
3871         set_entity_visibility(init_entity, visibility_local);
3872         set_entity_allocation(init_entity, allocation_static);
3873
3874         set_entity_initializer(init_entity, irinitializer);
3875
3876         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3877         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3878
3879         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3880         set_store(copyb_mem);
3881 }
3882
3883 static void create_initializer_local_variable_entity(declaration_t *declaration)
3884 {
3885         initializer_t *initializer = declaration->init.initializer;
3886         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3887         ir_entity     *entity      = declaration->v.entity;
3888         type_t        *type        = declaration->type;
3889         create_local_initializer(initializer, dbgi, entity, type);
3890 }
3891
3892 static void create_declaration_initializer(declaration_t *declaration)
3893 {
3894         initializer_t *initializer = declaration->init.initializer;
3895         if (initializer == NULL)
3896                 return;
3897
3898         declaration_kind_t declaration_kind
3899                 = (declaration_kind_t) declaration->declaration_kind;
3900         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3901                 create_initializer_local_variable_entity(declaration);
3902                 return;
3903         }
3904
3905         type_t            *type = declaration->type;
3906         type_qualifiers_t  tq   = get_type_qualifier(type, true);
3907
3908         if (initializer->kind == INITIALIZER_VALUE) {
3909                 initializer_value_t *initializer_value = &initializer->value;
3910                 dbg_info            *dbgi
3911                         = get_dbg_info(&declaration->source_position);
3912
3913                 ir_node *value = expression_to_firm(initializer_value->value);
3914                 value = do_strict_conv(dbgi, value);
3915
3916                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3917                         set_value(declaration->v.value_number, value);
3918                 } else {
3919                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3920
3921                         ir_entity *entity = declaration->v.entity;
3922
3923                         if (tq & TYPE_QUALIFIER_CONST) {
3924                                 set_entity_variability(entity, variability_constant);
3925                         } else {
3926                                 set_entity_variability(entity, variability_initialized);
3927                         }
3928                         set_atomic_ent_value(entity, value);
3929                 }
3930         } else {
3931                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
3932                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3933
3934                 ir_entity        *entity        = declaration->v.entity;
3935                 ir_initializer_t *irinitializer
3936                         = create_ir_initializer(initializer, type);
3937
3938                 if (tq & TYPE_QUALIFIER_CONST) {
3939                         set_entity_variability(entity, variability_constant);
3940                 } else {
3941                         set_entity_variability(entity, variability_initialized);
3942                 }
3943                 set_entity_initializer(entity, irinitializer);
3944         }
3945 }
3946
3947 static void create_variable_length_array(declaration_t *declaration)
3948 {
3949         /* initializers are not allowed for VLAs */
3950         assert(declaration->init.initializer == NULL);
3951
3952         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3953         declaration->v.vla_base       = NULL;
3954
3955         /* TODO: record VLA somewhere so we create the free node when we leave
3956          * it's scope */
3957 }
3958
3959 static void allocate_variable_length_array(declaration_t *declaration)
3960 {
3961         /* initializers are not allowed for VLAs */
3962         assert(declaration->init.initializer == NULL);
3963         assert(get_cur_block() != NULL);
3964
3965         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3966         type_t   *type      = declaration->type;
3967         ir_type  *el_type   = get_ir_type(type->array.element_type);
3968
3969         /* make sure size_node is calculated */
3970         get_type_size(type);
3971         ir_node  *elems = type->array.size_node;
3972         ir_node  *mem   = get_store();
3973         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3974
3975         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3976         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3977         set_store(proj_m);
3978
3979         assert(declaration->declaration_kind
3980                         == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3981         declaration->v.vla_base       = addr;
3982 }
3983
3984 /**
3985  * Creates a Firm local variable from a declaration.
3986  */
3987 static void create_local_variable(declaration_t *declaration)
3988 {
3989         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3990
3991         bool needs_entity = declaration->address_taken;
3992         type_t *type = skip_typeref(declaration->type);
3993
3994         /* is it a variable length array? */
3995         if (is_type_array(type) && !type->array.size_constant) {
3996                 create_variable_length_array(declaration);
3997                 return;
3998         } else if (is_type_array(type) || is_type_compound(type)) {
3999                 needs_entity = true;
4000         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4001                 needs_entity = true;
4002         }
4003
4004         if (needs_entity) {
4005                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4006                 create_declaration_entity(declaration,
4007                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4008                                           frame_type);
4009         } else {
4010                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
4011                 declaration->v.value_number   = next_value_number_function;
4012                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
4013                 ++next_value_number_function;
4014         }
4015 }
4016
4017 static void create_local_static_variable(declaration_t *declaration)
4018 {
4019         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
4020
4021         type_t    *const type        = skip_typeref(declaration->type);
4022         ir_type   *const global_type = get_glob_type();
4023         ir_type   *const irtype      = get_ir_type(type);
4024         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
4025
4026         size_t l = strlen(declaration->symbol->string);
4027         char   buf[l + sizeof(".%u")];
4028         snprintf(buf, sizeof(buf), "%s.%%u", declaration->symbol->string);
4029         ident     *const id = id_unique(buf);
4030
4031         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
4032
4033         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4034                 set_entity_volatility(entity, volatility_is_volatile);
4035         }
4036
4037         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4038         declaration->v.entity         = entity;
4039         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
4040         set_entity_variability(entity, variability_uninitialized);
4041         set_entity_visibility(entity, visibility_local);
4042         set_entity_allocation(entity, allocation_static);
4043
4044         ir_graph *const old_current_ir_graph = current_ir_graph;
4045         current_ir_graph = get_const_code_irg();
4046
4047         create_declaration_initializer(declaration);
4048
4049         assert(current_ir_graph == get_const_code_irg());
4050         current_ir_graph = old_current_ir_graph;
4051 }
4052
4053
4054
4055 static void return_statement_to_firm(return_statement_t *statement)
4056 {
4057         if (get_cur_block() == NULL)
4058                 return;
4059
4060         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4061         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
4062
4063
4064         ir_node *in[1];
4065         int      in_len;
4066         if (get_method_n_ress(func_irtype) > 0) {
4067                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4068
4069                 if (statement->value != NULL) {
4070                         ir_node *node = expression_to_firm(statement->value);
4071                         node  = do_strict_conv(dbgi, node);
4072                         in[0] = node;
4073                 } else {
4074                         ir_mode *mode;
4075                         if (is_compound_type(res_type)) {
4076                                 mode = mode_P_data;
4077                         } else {
4078                                 mode = get_type_mode(res_type);
4079                         }
4080                         in[0] = new_Unknown(mode);
4081                 }
4082                 in_len = 1;
4083         } else {
4084                 /* build return_value for its side effects */
4085                 if (statement->value != NULL) {
4086                         expression_to_firm(statement->value);
4087                 }
4088                 in_len = 0;
4089         }
4090
4091         ir_node  *store = get_store();
4092         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4093
4094         ir_node *end_block = get_irg_end_block(current_ir_graph);
4095         add_immBlock_pred(end_block, ret);
4096
4097         set_cur_block(NULL);
4098 }
4099
4100 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4101 {
4102         if (get_cur_block() == NULL)
4103                 return NULL;
4104
4105         return expression_to_firm(statement->expression);
4106 }
4107
4108 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4109 {
4110         declaration_t *declaration = compound->scope.declarations;
4111         for( ; declaration != NULL; declaration = declaration->next) {
4112                 create_local_declaration(declaration);
4113         }
4114
4115         ir_node     *result    = NULL;
4116         statement_t *statement = compound->statements;
4117         for( ; statement != NULL; statement = statement->base.next) {
4118                 if (statement->base.next == NULL
4119                                 && statement->kind == STATEMENT_EXPRESSION) {
4120                         result = expression_statement_to_firm(
4121                                         &statement->expression);
4122                         break;
4123                 }
4124                 statement_to_firm(statement);
4125         }
4126
4127         return result;
4128 }
4129
4130 static void create_global_variable(declaration_t *declaration)
4131 {
4132         ir_visibility  vis;
4133         ir_type       *var_type;
4134         switch ((storage_class_tag_t)declaration->storage_class) {
4135                 case STORAGE_CLASS_STATIC:
4136                         vis = visibility_local;
4137                         goto global_var;
4138
4139                 case STORAGE_CLASS_EXTERN:
4140                         vis = visibility_external_allocated;
4141                         goto global_var;
4142
4143                 case STORAGE_CLASS_NONE:
4144                         vis = visibility_external_visible;
4145                         goto global_var;
4146
4147                 case STORAGE_CLASS_THREAD:
4148                         vis = visibility_external_visible;
4149                         goto tls_var;
4150
4151                 case STORAGE_CLASS_THREAD_EXTERN:
4152                         vis = visibility_external_allocated;
4153                         goto tls_var;
4154
4155                 case STORAGE_CLASS_THREAD_STATIC:
4156                         vis = visibility_local;
4157                         goto tls_var;
4158
4159 tls_var:
4160                         var_type = get_tls_type();
4161                         goto create_var;
4162
4163 global_var:
4164                         var_type = get_glob_type();
4165                         goto create_var;
4166
4167 create_var:
4168                         create_declaration_entity(declaration,
4169                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
4170                                                   var_type);
4171                         if (!is_type_function(skip_typeref(declaration->type))) {
4172                                 set_entity_visibility(declaration->v.entity, vis);
4173                         }
4174
4175                         return;
4176
4177                 case STORAGE_CLASS_TYPEDEF:
4178                 case STORAGE_CLASS_AUTO:
4179                 case STORAGE_CLASS_REGISTER:
4180                 case STORAGE_CLASS_ENUM_ENTRY:
4181                         break;
4182         }
4183         panic("Invalid storage class for global variable");
4184 }
4185
4186 static void create_local_declaration(declaration_t *declaration)
4187 {
4188         if (declaration->namespc != NAMESPACE_NORMAL)
4189                 return;
4190         /* construct type */
4191         (void) get_ir_type(declaration->type);
4192         if (declaration->symbol == NULL) {
4193                 return;
4194         }
4195
4196         type_t *type = skip_typeref(declaration->type);
4197
4198         switch ((storage_class_tag_t) declaration->storage_class) {
4199         case STORAGE_CLASS_STATIC:
4200                 create_local_static_variable(declaration);
4201                 return;
4202         case STORAGE_CLASS_EXTERN:
4203                 create_global_variable(declaration);
4204                 create_declaration_initializer(declaration);
4205                 return;
4206         case STORAGE_CLASS_NONE:
4207         case STORAGE_CLASS_AUTO:
4208         case STORAGE_CLASS_REGISTER:
4209                 if (is_type_function(type)) {
4210                         if (declaration->init.statement != NULL) {
4211                                 get_function_entity(declaration);
4212                                 declaration->declaration_kind = DECLARATION_KIND_INNER_FUNCTION;
4213                                 enqueue_inner_function(declaration);
4214                         } else {
4215                                 get_function_entity(declaration);
4216                         }
4217                 } else {
4218                         create_local_variable(declaration);
4219                 }
4220                 return;
4221         case STORAGE_CLASS_ENUM_ENTRY:
4222                 /* should already be handled */
4223                 assert(declaration->declaration_kind == DECLARATION_KIND_ENUM_ENTRY);
4224                 return;
4225         case STORAGE_CLASS_TYPEDEF:
4226                 declaration->declaration_kind = DECLARATION_KIND_TYPE;
4227                 return;
4228         case STORAGE_CLASS_THREAD:
4229         case STORAGE_CLASS_THREAD_EXTERN:
4230         case STORAGE_CLASS_THREAD_STATIC:
4231                 break;
4232         }
4233         panic("invalid storage class found");
4234 }
4235
4236 static void initialize_local_declaration(declaration_t *declaration)
4237 {
4238         if (declaration->symbol == NULL || declaration->namespc != NAMESPACE_NORMAL)
4239                 return;
4240
4241         switch ((declaration_kind_t) declaration->declaration_kind) {
4242         case DECLARATION_KIND_LOCAL_VARIABLE:
4243         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4244                 create_declaration_initializer(declaration);
4245                 return;
4246
4247         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4248                 allocate_variable_length_array(declaration);
4249                 return;
4250
4251         case DECLARATION_KIND_LABEL_BLOCK:
4252         case DECLARATION_KIND_COMPOUND_MEMBER:
4253         case DECLARATION_KIND_GLOBAL_VARIABLE:
4254         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
4255         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
4256         case DECLARATION_KIND_FUNCTION:
4257         case DECLARATION_KIND_TYPE:
4258         case DECLARATION_KIND_ENUM_ENTRY:
4259         case DECLARATION_KIND_INNER_FUNCTION:
4260                 return;
4261
4262         case DECLARATION_KIND_UNKNOWN:
4263                 panic("can't initialize unknown declaration");
4264         }
4265         panic("invalid declaration kind");
4266 }
4267
4268 static void declaration_statement_to_firm(declaration_statement_t *statement)
4269 {
4270         declaration_t *declaration = statement->declarations_begin;
4271         declaration_t *end         = statement->declarations_end->next;
4272         for( ; declaration != end; declaration = declaration->next) {
4273                 if (declaration->namespc != NAMESPACE_NORMAL)
4274                         continue;
4275                 initialize_local_declaration(declaration);
4276         }
4277 }
4278
4279 static void if_statement_to_firm(if_statement_t *statement)
4280 {
4281         ir_node *cur_block = get_cur_block();
4282
4283         ir_node *fallthrough_block = NULL;
4284
4285         /* the true (blocks) */
4286         ir_node *true_block = NULL;
4287         if (statement->true_statement != NULL) {
4288                 true_block = new_immBlock();
4289                 statement_to_firm(statement->true_statement);
4290                 if (get_cur_block() != NULL) {
4291                         ir_node *jmp = new_Jmp();
4292                         if (fallthrough_block == NULL)
4293                                 fallthrough_block = new_immBlock();
4294                         add_immBlock_pred(fallthrough_block, jmp);
4295                 }
4296         }
4297
4298         /* the false (blocks) */
4299         ir_node *false_block = NULL;
4300         if (statement->false_statement != NULL) {
4301                 false_block = new_immBlock();
4302
4303                 statement_to_firm(statement->false_statement);
4304                 if (get_cur_block() != NULL) {
4305                         ir_node *jmp = new_Jmp();
4306                         if (fallthrough_block == NULL)
4307                                 fallthrough_block = new_immBlock();
4308                         add_immBlock_pred(fallthrough_block, jmp);
4309                 }
4310         }
4311
4312         /* create the condition */
4313         if (cur_block != NULL) {
4314                 if (true_block == NULL || false_block == NULL) {
4315                         if (fallthrough_block == NULL)
4316                                 fallthrough_block = new_immBlock();
4317                         if (true_block == NULL)
4318                                 true_block = fallthrough_block;
4319                         if (false_block == NULL)
4320                                 false_block = fallthrough_block;
4321                 }
4322
4323                 set_cur_block(cur_block);
4324                 create_condition_evaluation(statement->condition, true_block,
4325                                             false_block);
4326         }
4327
4328         mature_immBlock(true_block);
4329         if (false_block != fallthrough_block && false_block != NULL) {
4330                 mature_immBlock(false_block);
4331         }
4332         if (fallthrough_block != NULL) {
4333                 mature_immBlock(fallthrough_block);
4334         }
4335
4336         set_cur_block(fallthrough_block);
4337 }
4338
4339 static void while_statement_to_firm(while_statement_t *statement)
4340 {
4341         ir_node *jmp = NULL;
4342         if (get_cur_block() != NULL) {
4343                 jmp = new_Jmp();
4344         }
4345
4346         /* create the header block */
4347         ir_node *header_block = new_immBlock();
4348         if (jmp != NULL) {
4349                 add_immBlock_pred(header_block, jmp);
4350         }
4351
4352         /* the loop body */
4353         ir_node *old_continue_label = continue_label;
4354         ir_node *old_break_label    = break_label;
4355         continue_label              = header_block;
4356         break_label                 = NULL;
4357
4358         ir_node *body_block = new_immBlock();
4359         statement_to_firm(statement->body);
4360         ir_node *false_block = break_label;
4361
4362         assert(continue_label == header_block);
4363         continue_label = old_continue_label;
4364         break_label    = old_break_label;
4365
4366         if (get_cur_block() != NULL) {
4367                 jmp = new_Jmp();
4368                 add_immBlock_pred(header_block, jmp);
4369         }
4370
4371         /* shortcut for while(true) */
4372         if (is_constant_expression(statement->condition)
4373                         && fold_constant(statement->condition) != 0) {
4374                 set_cur_block(header_block);
4375                 ir_node *header_jmp = new_Jmp();
4376                 add_immBlock_pred(body_block, header_jmp);
4377
4378                 keep_alive(body_block);
4379                 keep_all_memory(body_block);
4380                 set_cur_block(body_block);
4381         } else {
4382                 if (false_block == NULL) {
4383                         false_block = new_immBlock();
4384                 }
4385
4386                 /* create the condition */
4387                 set_cur_block(header_block);
4388
4389                 create_condition_evaluation(statement->condition, body_block,
4390                                             false_block);
4391         }
4392
4393         mature_immBlock(body_block);
4394         mature_immBlock(header_block);
4395         if (false_block != NULL) {
4396                 mature_immBlock(false_block);
4397         }
4398
4399         set_cur_block(false_block);
4400 }
4401
4402 static void do_while_statement_to_firm(do_while_statement_t *statement)
4403 {
4404         ir_node *jmp = NULL;
4405         if (get_cur_block() != NULL) {
4406                 jmp = new_Jmp();
4407         }
4408
4409         /* create the header block */
4410         ir_node *header_block = new_immBlock();
4411
4412         /* the loop body */
4413         ir_node *body_block = new_immBlock();
4414         if (jmp != NULL) {
4415                 add_immBlock_pred(body_block, jmp);
4416         }
4417
4418         ir_node *old_continue_label = continue_label;
4419         ir_node *old_break_label    = break_label;
4420         continue_label              = header_block;
4421         break_label                 = NULL;
4422
4423         statement_to_firm(statement->body);
4424         ir_node *false_block = break_label;
4425
4426         assert(continue_label == header_block);
4427         continue_label = old_continue_label;
4428         break_label    = old_break_label;
4429
4430         if (get_cur_block() != NULL) {
4431                 ir_node *body_jmp = new_Jmp();
4432                 add_immBlock_pred(header_block, body_jmp);
4433                 mature_immBlock(header_block);
4434         }
4435
4436         if (false_block == NULL) {
4437                 false_block = new_immBlock();
4438         }
4439
4440         /* create the condition */
4441         set_cur_block(header_block);
4442
4443         create_condition_evaluation(statement->condition, body_block, false_block);
4444         mature_immBlock(body_block);
4445         mature_immBlock(header_block);
4446         if (false_block != NULL) {
4447                 mature_immBlock(false_block);
4448         }
4449
4450         set_cur_block(false_block);
4451 }
4452
4453 static void for_statement_to_firm(for_statement_t *statement)
4454 {
4455         ir_node *jmp = NULL;
4456
4457         /* create declarations */
4458         declaration_t *declaration = statement->scope.declarations;
4459         for( ; declaration != NULL; declaration = declaration->next) {
4460                 create_local_declaration(declaration);
4461         }
4462
4463         if (get_cur_block() != NULL) {
4464                 declaration = statement->scope.declarations;
4465                 for( ; declaration != NULL; declaration = declaration->next) {
4466                         initialize_local_declaration(declaration);
4467                 }
4468
4469                 if (statement->initialisation != NULL) {
4470                         expression_to_firm(statement->initialisation);
4471                 }
4472
4473                 jmp = new_Jmp();
4474         }
4475
4476
4477         /* create the step block */
4478         ir_node *const step_block = new_immBlock();
4479         if (statement->step != NULL) {
4480                 expression_to_firm(statement->step);
4481         }
4482         ir_node *const step_jmp = new_Jmp();
4483
4484         /* create the header block */
4485         ir_node *const header_block = new_immBlock();
4486         if (jmp != NULL) {
4487                 add_immBlock_pred(header_block, jmp);
4488         }
4489         add_immBlock_pred(header_block, step_jmp);
4490
4491         /* the false block */
4492         ir_node *const false_block = new_immBlock();
4493
4494         /* the loop body */
4495         ir_node * body_block;
4496         if (statement->body != NULL) {
4497                 ir_node *const old_continue_label = continue_label;
4498                 ir_node *const old_break_label    = break_label;
4499                 continue_label = step_block;
4500                 break_label    = false_block;
4501
4502                 body_block = new_immBlock();
4503                 statement_to_firm(statement->body);
4504
4505                 assert(continue_label == step_block);
4506                 assert(break_label    == false_block);
4507                 continue_label = old_continue_label;
4508                 break_label    = old_break_label;
4509
4510                 if (get_cur_block() != NULL) {
4511                         jmp = new_Jmp();
4512                         add_immBlock_pred(step_block, jmp);
4513                 }
4514         } else {
4515                 body_block = step_block;
4516         }
4517
4518         /* create the condition */
4519         set_cur_block(header_block);
4520         if (statement->condition != NULL) {
4521                 create_condition_evaluation(statement->condition, body_block,
4522                                             false_block);
4523         } else {
4524                 keep_alive(header_block);
4525                 keep_all_memory(header_block);
4526                 jmp = new_Jmp();
4527                 add_immBlock_pred(body_block, jmp);
4528         }
4529
4530         mature_immBlock(body_block);
4531         mature_immBlock(false_block);
4532         mature_immBlock(step_block);
4533         mature_immBlock(header_block);
4534         mature_immBlock(false_block);
4535
4536         set_cur_block(false_block);
4537 }
4538
4539 static void create_jump_statement(const statement_t *statement,
4540                                   ir_node *target_block)
4541 {
4542         if (get_cur_block() == NULL)
4543                 return;
4544
4545         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4546         ir_node  *jump = new_d_Jmp(dbgi);
4547         add_immBlock_pred(target_block, jump);
4548
4549         set_cur_block(NULL);
4550 }
4551
4552 static ir_node *get_break_label(void)
4553 {
4554         if (break_label == NULL) {
4555                 ir_node *cur_block = get_cur_block();
4556                 break_label = new_immBlock();
4557                 set_cur_block(cur_block);
4558         }
4559         return break_label;
4560 }
4561
4562 static void switch_statement_to_firm(switch_statement_t *statement)
4563 {
4564         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4565
4566         ir_node *expression  = expression_to_firm(statement->expression);
4567         ir_node *cond        = new_d_Cond(dbgi, expression);
4568
4569         set_cur_block(NULL);
4570
4571         ir_node *const old_switch_cond       = current_switch_cond;
4572         ir_node *const old_break_label       = break_label;
4573         const bool     old_saw_default_label = saw_default_label;
4574         saw_default_label                    = false;
4575         current_switch_cond                  = cond;
4576         break_label                          = NULL;
4577         switch_statement_t *const old_switch = current_switch;
4578         current_switch                       = statement;
4579
4580         /* determine a free number for the default label */
4581         unsigned long num_cases = 0;
4582         long def_nr = 0;
4583         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4584                 if (l->expression == NULL) {
4585                         /* default case */
4586                         continue;
4587                 }
4588                 if (l->last_case >= l->first_case)
4589                         num_cases += l->last_case - l->first_case;
4590                 if (l->last_case > def_nr)
4591                         def_nr = l->last_case;
4592         }
4593
4594         if (def_nr + 1 < 0) {
4595                 /* Bad: an overflow occurred, we cannot be sure that the
4596          * maximum + 1 is a free number. Scan the values a second
4597          * time to find a free number.
4598          */
4599                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4600                 unsigned long i;
4601
4602                 memset(bits, 0, (num_cases + 7) >> 3);
4603                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4604                         if (l->expression == NULL) {
4605                                 /* default case */
4606                                 continue;
4607                         }
4608                         for (long cns = l->first_case; cns <= l->last_case; ++cns) {
4609                                 if (cns >= 0 && (unsigned long)cns < num_cases)
4610                                         bits[cns >> 3] |= (1 << (cns & 7));
4611                         }
4612                 }
4613                 /* We look at the first num_cases constants:
4614                  * Either they are densed, so we took the last (num_cases)
4615                  * one, or they are non densed, so we will find one free
4616                  * there...
4617                  */
4618                 for (i = 0; i < num_cases; ++i)
4619                         if ((bits[i >> 3] & (i & 7)) == 0)
4620                                 break;
4621
4622                 free(bits);
4623                 def_nr = i;
4624         } else {
4625                 ++def_nr;
4626         }
4627         statement->default_proj_nr = def_nr;
4628
4629         if (statement->body != NULL) {
4630                 statement_to_firm(statement->body);
4631         }
4632
4633         if (get_cur_block() != NULL) {
4634                 ir_node *jmp = new_Jmp();
4635                 add_immBlock_pred(get_break_label(), jmp);
4636         }
4637
4638         if (!saw_default_label) {
4639                 set_cur_block(get_nodes_block(cond));
4640                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4641                                                         statement->default_proj_nr);
4642                 add_immBlock_pred(get_break_label(), proj);
4643         }
4644
4645         if (break_label != NULL) {
4646                 mature_immBlock(break_label);
4647         }
4648         set_cur_block(break_label);
4649
4650         assert(current_switch_cond == cond);
4651         current_switch      = old_switch;
4652         current_switch_cond = old_switch_cond;
4653         break_label         = old_break_label;
4654         saw_default_label   = old_saw_default_label;
4655 }
4656
4657 static void case_label_to_firm(const case_label_statement_t *statement)
4658 {
4659         if (statement->is_empty_range)
4660                 return;
4661
4662         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4663
4664         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4665
4666         ir_node *proj;
4667         ir_node *old_block = get_nodes_block(current_switch_cond);
4668         ir_node *block     = new_immBlock();
4669
4670         set_cur_block(old_block);
4671         if (statement->expression != NULL) {
4672                 long pn     = statement->first_case;
4673                 long end_pn = statement->last_case;
4674                 assert(pn <= end_pn);
4675                 /* create jumps for all cases in the given range */
4676                 do {
4677                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4678                         add_immBlock_pred(block, proj);
4679                 } while(pn++ < end_pn);
4680         } else {
4681                 saw_default_label = true;
4682                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4683                                          current_switch->default_proj_nr);
4684
4685                 add_immBlock_pred(block, proj);
4686         }
4687
4688         if (fallthrough != NULL) {
4689                 add_immBlock_pred(block, fallthrough);
4690         }
4691         mature_immBlock(block);
4692         set_cur_block(block);
4693
4694         if (statement->statement != NULL) {
4695                 statement_to_firm(statement->statement);
4696         }
4697 }
4698
4699 static void label_to_firm(const label_statement_t *statement)
4700 {
4701         ir_node *block = get_label_block(statement->label);
4702
4703         if (get_cur_block() != NULL) {
4704                 ir_node *jmp = new_Jmp();
4705                 add_immBlock_pred(block, jmp);
4706         }
4707
4708         set_cur_block(block);
4709         keep_alive(block);
4710         keep_all_memory(block);
4711
4712         if (statement->statement != NULL) {
4713                 statement_to_firm(statement->statement);
4714         }
4715 }
4716
4717 static void goto_to_firm(const goto_statement_t *statement)
4718 {
4719         if (get_cur_block() == NULL)
4720                 return;
4721
4722         if (statement->expression) {
4723                 ir_node  *irn  = expression_to_firm(statement->expression);
4724                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4725                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4726
4727                 set_irn_link(ijmp, ijmp_list);
4728                 ijmp_list = ijmp;
4729         } else {
4730                 if (statement->outer_fkt_jmp) {
4731                         /* TODO: this is a outer function jmp */
4732                         panic("outer function jump not implemented");
4733                 } else {
4734                         ir_node *block = get_label_block(statement->label);
4735                         ir_node *jmp   = new_Jmp();
4736                         add_immBlock_pred(block, jmp);
4737                 }
4738         }
4739         set_cur_block(NULL);
4740 }
4741
4742 static void asm_statement_to_firm(const asm_statement_t *statement)
4743 {
4744         bool needs_memory = false;
4745
4746         if (statement->is_volatile) {
4747                 needs_memory = true;
4748         }
4749
4750         size_t         n_clobbers = 0;
4751         asm_clobber_t *clobber    = statement->clobbers;
4752         for( ; clobber != NULL; clobber = clobber->next) {
4753                 const char *clobber_str = clobber->clobber.begin;
4754
4755                 if (!be_is_valid_clobber(clobber_str)) {
4756                         errorf(&statement->base.source_position,
4757                                    "invalid clobber '%s' specified", clobber->clobber);
4758                         continue;
4759                 }
4760
4761                 if (strcmp(clobber_str, "memory") == 0) {
4762                         needs_memory = true;
4763                         continue;
4764                 }
4765
4766                 ident *id = new_id_from_str(clobber_str);
4767                 obstack_ptr_grow(&asm_obst, id);
4768                 ++n_clobbers;
4769         }
4770         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4771         ident **clobbers = NULL;
4772         if (n_clobbers > 0) {
4773                 clobbers = obstack_finish(&asm_obst);
4774         }
4775
4776         size_t n_inputs  = 0;
4777         asm_argument_t *argument = statement->inputs;
4778         for ( ; argument != NULL; argument = argument->next)
4779                 n_inputs++;
4780         size_t n_outputs = 0;
4781         argument = statement->outputs;
4782         for ( ; argument != NULL; argument = argument->next)
4783                 n_outputs++;
4784
4785         unsigned next_pos = 0;
4786
4787         ir_node *ins[n_inputs + n_outputs + 1];
4788         size_t   in_size = 0;
4789
4790         ir_asm_constraint tmp_in_constraints[n_outputs];
4791
4792         const expression_t *out_exprs[n_outputs];
4793         ir_node            *out_addrs[n_outputs];
4794         size_t              out_size = 0;
4795
4796         argument = statement->outputs;
4797         for ( ; argument != NULL; argument = argument->next) {
4798                 const char *constraints = argument->constraints.begin;
4799                 asm_constraint_flags_t asm_flags
4800                         = be_parse_asm_constraints(constraints);
4801
4802                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4803                         errorf(&statement->base.source_position,
4804                                "some constraints in '%s' are not supported", constraints);
4805                         continue;
4806                 }
4807                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4808                         errorf(&statement->base.source_position,
4809                                "some constraints in '%s' are invalid", constraints);
4810                         continue;
4811                 }
4812                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4813                         errorf(&statement->base.source_position,
4814                                "no write flag specified for output constraints '%s'",
4815                                constraints);
4816                         continue;
4817                 }
4818
4819                 unsigned pos = next_pos++;
4820                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4821                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4822                         expression_t *expr = argument->expression;
4823                         ir_node      *addr = expression_to_addr(expr);
4824                         /* in+output, construct an artifical same_as constraint on the
4825                          * input */
4826                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4827                                 char     buf[64];
4828                                 ir_node *value = get_value_from_lvalue(expr, addr);
4829
4830                                 snprintf(buf, sizeof(buf), "%d", pos);
4831
4832                                 ir_asm_constraint constraint;
4833                                 constraint.pos              = pos;
4834                                 constraint.constraint       = new_id_from_str(buf);
4835                                 constraint.mode             = get_ir_mode(expr->base.type);
4836                                 tmp_in_constraints[in_size] = constraint;
4837                                 ins[in_size] = value;
4838
4839                                 ++in_size;
4840                         }
4841
4842                         out_exprs[out_size] = expr;
4843                         out_addrs[out_size] = addr;
4844                         ++out_size;
4845                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4846                         /* pure memory ops need no input (but we have to make sure we
4847                          * attach to the memory) */
4848                         assert(! (asm_flags &
4849                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4850                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4851                         needs_memory = true;
4852
4853                         /* we need to attach the address to the inputs */
4854                         expression_t *expr = argument->expression;
4855
4856                         ir_asm_constraint constraint;
4857                         constraint.pos              = pos;
4858                         constraint.constraint       = new_id_from_str(constraints);
4859                         constraint.mode             = NULL;
4860                         tmp_in_constraints[in_size] = constraint;
4861
4862                         ins[in_size]          = expression_to_addr(expr);
4863                         ++in_size;
4864                         continue;
4865                 } else {
4866                         errorf(&statement->base.source_position,
4867                                "only modifiers but no place set in constraints '%s'",
4868                                constraints);
4869                         continue;
4870                 }
4871
4872                 ir_asm_constraint constraint;
4873                 constraint.pos        = pos;
4874                 constraint.constraint = new_id_from_str(constraints);
4875                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4876
4877                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4878         }
4879         assert(obstack_object_size(&asm_obst)
4880                         == out_size * sizeof(ir_asm_constraint));
4881         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4882
4883
4884         obstack_grow(&asm_obst, tmp_in_constraints,
4885                      in_size * sizeof(tmp_in_constraints[0]));
4886         /* find and count input and output arguments */
4887         argument = statement->inputs;
4888         for( ; argument != NULL; argument = argument->next) {
4889                 const char *constraints = argument->constraints.begin;
4890                 asm_constraint_flags_t asm_flags
4891                         = be_parse_asm_constraints(constraints);
4892
4893                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4894                         errorf(&statement->base.source_position,
4895                                "some constraints in '%s' are not supported", constraints);
4896                         continue;
4897                 }
4898                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4899                         errorf(&statement->base.source_position,
4900                                "some constraints in '%s' are invalid", constraints);
4901                         continue;
4902                 }
4903                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4904                         errorf(&statement->base.source_position,
4905                                "write flag specified for input constraints '%s'",
4906                                constraints);
4907                         continue;
4908                 }
4909
4910                 ir_node *input;
4911                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4912                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4913                         /* we can treat this as "normal" input */
4914                         input = expression_to_firm(argument->expression);
4915                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4916                         /* pure memory ops need no input (but we have to make sure we
4917                          * attach to the memory) */
4918                         assert(! (asm_flags &
4919                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4920                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4921                         needs_memory = true;
4922                         input = expression_to_addr(argument->expression);
4923                 } else {
4924                         errorf(&statement->base.source_position,
4925                                "only modifiers but no place set in constraints '%s'",
4926                                constraints);
4927                         continue;
4928                 }
4929
4930                 ir_asm_constraint constraint;
4931                 constraint.pos        = next_pos++;
4932                 constraint.constraint = new_id_from_str(constraints);
4933                 constraint.mode       = get_irn_mode(input);
4934
4935                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4936                 ins[in_size++] = input;
4937         }
4938
4939         if (needs_memory) {
4940                 ir_asm_constraint constraint;
4941                 constraint.pos        = next_pos++;
4942                 constraint.constraint = new_id_from_str("");
4943                 constraint.mode       = mode_M;
4944
4945                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4946                 ins[in_size++] = get_store();
4947         }
4948
4949         assert(obstack_object_size(&asm_obst)
4950                         == in_size * sizeof(ir_asm_constraint));
4951         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4952
4953         /* create asm node */
4954         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4955
4956         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4957
4958         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4959                                   out_size, output_constraints,
4960                                   n_clobbers, clobbers, asm_text);
4961
4962         if (statement->is_volatile) {
4963                 set_irn_pinned(node, op_pin_state_pinned);
4964         } else {
4965                 set_irn_pinned(node, op_pin_state_floats);
4966         }
4967
4968         /* create output projs & connect them */
4969         if (needs_memory) {
4970                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4971                 set_store(projm);
4972         }
4973
4974         size_t i;
4975         for (i = 0; i < out_size; ++i) {
4976                 const expression_t *out_expr = out_exprs[i];
4977                 long                pn       = i;
4978                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4979                 ir_node            *proj     = new_Proj(node, mode, pn);
4980                 ir_node            *addr     = out_addrs[i];
4981
4982                 set_value_for_expression_addr(out_expr, proj, addr);
4983         }
4984 }
4985
4986 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4987         statement_to_firm(statement->try_statement);
4988         warningf(&statement->base.source_position, "structured exception handling ignored");
4989 }
4990
4991 static void     leave_statement_to_firm(leave_statement_t *statement) {
4992         errorf(&statement->base.source_position, "__leave not supported yet");
4993 }
4994
4995 /**
4996  * Transform a statement.
4997  */
4998 static void statement_to_firm(statement_t *statement)
4999 {
5000 #ifndef NDEBUG
5001         assert(!statement->base.transformed);
5002         statement->base.transformed = true;
5003 #endif
5004
5005         switch(statement->kind) {
5006         case STATEMENT_INVALID:
5007                 panic("invalid statement found");
5008                 return;
5009         case STATEMENT_EMPTY:
5010                 /* nothing */
5011                 return;
5012         case STATEMENT_COMPOUND:
5013                 compound_statement_to_firm(&statement->compound);
5014                 return;
5015         case STATEMENT_RETURN:
5016                 return_statement_to_firm(&statement->returns);
5017                 return;
5018         case STATEMENT_EXPRESSION:
5019                 expression_statement_to_firm(&statement->expression);
5020                 return;
5021         case STATEMENT_IF:
5022                 if_statement_to_firm(&statement->ifs);
5023                 return;
5024         case STATEMENT_WHILE:
5025                 while_statement_to_firm(&statement->whiles);
5026                 return;
5027         case STATEMENT_DO_WHILE:
5028                 do_while_statement_to_firm(&statement->do_while);
5029                 return;
5030         case STATEMENT_DECLARATION:
5031                 declaration_statement_to_firm(&statement->declaration);
5032                 return;
5033         case STATEMENT_BREAK:
5034                 create_jump_statement(statement, get_break_label());
5035                 return;
5036         case STATEMENT_CONTINUE:
5037                 create_jump_statement(statement, continue_label);
5038                 return;
5039         case STATEMENT_SWITCH:
5040                 switch_statement_to_firm(&statement->switchs);
5041                 return;
5042         case STATEMENT_CASE_LABEL:
5043                 case_label_to_firm(&statement->case_label);
5044                 return;
5045         case STATEMENT_FOR:
5046                 for_statement_to_firm(&statement->fors);
5047                 return;
5048         case STATEMENT_LABEL:
5049                 label_to_firm(&statement->label);
5050                 return;
5051         case STATEMENT_GOTO:
5052                 goto_to_firm(&statement->gotos);
5053                 return;
5054         case STATEMENT_ASM:
5055                 asm_statement_to_firm(&statement->asms);
5056                 return;
5057         case STATEMENT_MS_TRY:
5058                 ms_try_statement_to_firm(&statement->ms_try);
5059                 return;
5060         case STATEMENT_LEAVE:
5061                 leave_statement_to_firm(&statement->leave);
5062                 return;
5063         }
5064         panic("Statement not implemented\n");
5065 }
5066
5067 static int count_decls_in_expression(const expression_t *expression);
5068
5069 static int count_local_declarations(const declaration_t *      decl,
5070                                     const declaration_t *const end)
5071 {
5072         int count = 0;
5073         for (; decl != end; decl = decl->next) {
5074                 if (decl->namespc != NAMESPACE_NORMAL)
5075                         continue;
5076                 type_t *type = skip_typeref(decl->type);
5077
5078                 if (!decl->address_taken && is_type_scalar(type))
5079                         ++count;
5080                 const initializer_t *initializer = decl->init.initializer;
5081                 /* FIXME: should walk initializer hierarchies... */
5082                 if (initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
5083                         count += count_decls_in_expression(initializer->value.value);
5084                 }
5085         }
5086         return count;
5087 }
5088
5089 static int count_decls_in_expression(const expression_t *expression) {
5090         int count = 0;
5091
5092         if (expression == NULL)
5093                 return 0;
5094
5095         switch((expression_kind_t) expression->base.kind) {
5096         case EXPR_STATEMENT:
5097                 return count_decls_in_stmts(expression->statement.statement);
5098         EXPR_BINARY_CASES {
5099                 int count_left  = count_decls_in_expression(expression->binary.left);
5100                 int count_right = count_decls_in_expression(expression->binary.right);
5101                 return count_left + count_right;
5102         }
5103         EXPR_UNARY_CASES
5104                 return count_decls_in_expression(expression->unary.value);
5105         case EXPR_CALL: {
5106                 call_argument_t *argument = expression->call.arguments;
5107                 for( ; argument != NULL; argument = argument->next) {
5108                         count += count_decls_in_expression(argument->expression);
5109                 }
5110                 return count;
5111         }
5112
5113         case EXPR_UNKNOWN:
5114         case EXPR_INVALID:
5115                 panic("unexpected expression kind");
5116
5117         case EXPR_COMPOUND_LITERAL:
5118                 /* TODO... */
5119                 break;
5120
5121         case EXPR_CONDITIONAL:
5122                 count += count_decls_in_expression(expression->conditional.condition);
5123                 count += count_decls_in_expression(expression->conditional.true_expression);
5124                 count += count_decls_in_expression(expression->conditional.false_expression);
5125                 return count;
5126
5127         case EXPR_BUILTIN_PREFETCH:
5128                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
5129                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
5130                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
5131                 return count;
5132
5133         case EXPR_BUILTIN_CONSTANT_P:
5134                 count += count_decls_in_expression(expression->builtin_constant.value);
5135                 return count;
5136
5137         case EXPR_SELECT:
5138                 count += count_decls_in_expression(expression->select.compound);
5139                 return count;
5140
5141         case EXPR_ARRAY_ACCESS:
5142                 count += count_decls_in_expression(expression->array_access.array_ref);
5143                 count += count_decls_in_expression(expression->array_access.index);
5144                 return count;
5145
5146         case EXPR_CLASSIFY_TYPE:
5147                 count += count_decls_in_expression(expression->classify_type.type_expression);
5148                 return count;
5149
5150         case EXPR_SIZEOF:
5151         case EXPR_ALIGNOF: {
5152                 expression_t *tp_expression = expression->typeprop.tp_expression;
5153                 if (tp_expression != NULL) {
5154                         count += count_decls_in_expression(tp_expression);
5155                 }
5156                 return count;
5157         }
5158
5159         case EXPR_OFFSETOF:
5160         case EXPR_REFERENCE:
5161         case EXPR_CONST:
5162         case EXPR_CHARACTER_CONSTANT:
5163         case EXPR_WIDE_CHARACTER_CONSTANT:
5164         case EXPR_STRING_LITERAL:
5165         case EXPR_WIDE_STRING_LITERAL:
5166         case EXPR_FUNCNAME:
5167         case EXPR_BUILTIN_SYMBOL:
5168         case EXPR_VA_START:
5169         case EXPR_VA_ARG:
5170         case EXPR_LABEL_ADDRESS:
5171                 break;
5172         }
5173
5174         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
5175          * (or implement all the missing expressions here/implement a walker)
5176          */
5177
5178         return 0;
5179 }
5180
5181 static int count_decls_in_stmts(const statement_t *stmt)
5182 {
5183         int count = 0;
5184         for (; stmt != NULL; stmt = stmt->base.next) {
5185                 switch (stmt->kind) {
5186                         case STATEMENT_EMPTY:
5187                                 break;
5188
5189                         case STATEMENT_DECLARATION: {
5190                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5191                                 count += count_local_declarations(decl_stmt->declarations_begin,
5192                                                                   decl_stmt->declarations_end->next);
5193                                 break;
5194                         }
5195
5196                         case STATEMENT_COMPOUND: {
5197                                 const compound_statement_t *const comp =
5198                                         &stmt->compound;
5199                                 count += count_decls_in_stmts(comp->statements);
5200                                 break;
5201                         }
5202
5203                         case STATEMENT_IF: {
5204                                 const if_statement_t *const if_stmt = &stmt->ifs;
5205                                 count += count_decls_in_expression(if_stmt->condition);
5206                                 count += count_decls_in_stmts(if_stmt->true_statement);
5207                                 count += count_decls_in_stmts(if_stmt->false_statement);
5208                                 break;
5209                         }
5210
5211                         case STATEMENT_SWITCH: {
5212                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
5213                                 count += count_decls_in_expression(switch_stmt->expression);
5214                                 count += count_decls_in_stmts(switch_stmt->body);
5215                                 break;
5216                         }
5217
5218                         case STATEMENT_LABEL: {
5219                                 const label_statement_t *const label_stmt = &stmt->label;
5220                                 if (label_stmt->statement != NULL) {
5221                                         count += count_decls_in_stmts(label_stmt->statement);
5222                                 }
5223                                 break;
5224                         }
5225
5226                         case STATEMENT_WHILE: {
5227                                 const while_statement_t *const while_stmt = &stmt->whiles;
5228                                 count += count_decls_in_expression(while_stmt->condition);
5229                                 count += count_decls_in_stmts(while_stmt->body);
5230                                 break;
5231                         }
5232
5233                         case STATEMENT_DO_WHILE: {
5234                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
5235                                 count += count_decls_in_expression(do_while_stmt->condition);
5236                                 count += count_decls_in_stmts(do_while_stmt->body);
5237                                 break;
5238                         }
5239
5240                         case STATEMENT_FOR: {
5241                                 const for_statement_t *const for_stmt = &stmt->fors;
5242                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
5243                                 count += count_decls_in_expression(for_stmt->initialisation);
5244                                 count += count_decls_in_expression(for_stmt->condition);
5245                                 count += count_decls_in_expression(for_stmt->step);
5246                                 count += count_decls_in_stmts(for_stmt->body);
5247                                 break;
5248                         }
5249
5250                         case STATEMENT_CASE_LABEL: {
5251                                 const case_label_statement_t *label = &stmt->case_label;
5252                                 count += count_decls_in_expression(label->expression);
5253                                 if (label->statement != NULL) {
5254                                         count += count_decls_in_stmts(label->statement);
5255                                 }
5256                                 break;
5257                         }
5258
5259                         case STATEMENT_ASM:
5260                         case STATEMENT_BREAK:
5261                         case STATEMENT_CONTINUE:
5262                                 break;
5263
5264                         case STATEMENT_EXPRESSION: {
5265                                 const expression_statement_t *expr_stmt = &stmt->expression;
5266                                 count += count_decls_in_expression(expr_stmt->expression);
5267                                 break;
5268                         }
5269
5270                         case STATEMENT_GOTO:
5271                         case STATEMENT_LEAVE:
5272                         case STATEMENT_INVALID:
5273                                 break;
5274
5275                         case STATEMENT_RETURN: {
5276                                 const return_statement_t *ret_stmt = &stmt->returns;
5277                                 count += count_decls_in_expression(ret_stmt->value);
5278                                 break;
5279                         }
5280
5281                         case STATEMENT_MS_TRY: {
5282                                 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
5283                                 count += count_decls_in_stmts(try_stmt->try_statement);
5284                                 if (try_stmt->except_expression != NULL)
5285                                         count += count_decls_in_expression(try_stmt->except_expression);
5286                                 count += count_decls_in_stmts(try_stmt->final_statement);
5287                                 break;
5288                         }
5289                 }
5290         }
5291         return count;
5292 }
5293
5294 static int get_function_n_local_vars(declaration_t *declaration)
5295 {
5296         int count = 0;
5297
5298         /* count parameters */
5299         count += count_local_declarations(declaration->scope.declarations, NULL);
5300
5301         /* count local variables declared in body */
5302         count += count_decls_in_stmts(declaration->init.statement);
5303
5304         return count;
5305 }
5306
5307 static void initialize_function_parameters(declaration_t *declaration)
5308 {
5309         ir_graph        *irg             = current_ir_graph;
5310         ir_node         *args            = get_irg_args(irg);
5311         ir_node         *start_block     = get_irg_start_block(irg);
5312         ir_type         *function_irtype = get_ir_type(declaration->type);
5313
5314         int            n         = 0;
5315         declaration_t *parameter = declaration->scope.declarations;
5316         for( ; parameter != NULL; parameter = parameter->next, ++n) {
5317                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
5318                 type_t *type = skip_typeref(parameter->type);
5319
5320                 bool needs_entity = parameter->address_taken;
5321                 assert(!is_type_array(type));
5322                 if (is_type_compound(type)) {
5323                         needs_entity = true;
5324                 }
5325
5326                 if (needs_entity) {
5327                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5328                         ident     *id     = new_id_from_str(parameter->symbol->string);
5329                         set_entity_ident(entity, id);
5330
5331                         parameter->declaration_kind
5332                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5333                         parameter->v.entity = entity;
5334                         continue;
5335                 }
5336
5337                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5338                 ir_mode *param_mode   = get_type_mode(param_irtype);
5339
5340                 long     pn    = n;
5341                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5342
5343                 ir_mode *mode = get_ir_mode(type);
5344                 value = create_conv(NULL, value, mode);
5345                 value = do_strict_conv(NULL, value);
5346
5347                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
5348                 parameter->v.value_number   = next_value_number_function;
5349                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
5350                 ++next_value_number_function;
5351
5352                 set_value(parameter->v.value_number, value);
5353         }
5354 }
5355
5356 /**
5357  * Handle additional decl modifiers for IR-graphs
5358  *
5359  * @param irg            the IR-graph
5360  * @param dec_modifiers  additional modifiers
5361  */
5362 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5363 {
5364         if (decl_modifiers & DM_NORETURN) {
5365                 /* TRUE if the declaration includes the Microsoft
5366                    __declspec(noreturn) specifier. */
5367                 set_irg_additional_property(irg, mtp_property_noreturn);
5368         }
5369         if (decl_modifiers & DM_NOTHROW) {
5370                 /* TRUE if the declaration includes the Microsoft
5371                    __declspec(nothrow) specifier. */
5372                 set_irg_additional_property(irg, mtp_property_nothrow);
5373         }
5374         if (decl_modifiers & DM_NAKED) {
5375                 /* TRUE if the declaration includes the Microsoft
5376                    __declspec(naked) specifier. */
5377                 set_irg_additional_property(irg, mtp_property_naked);
5378         }
5379         if (decl_modifiers & DM_FORCEINLINE) {
5380                 /* TRUE if the declaration includes the
5381                    Microsoft __forceinline specifier. */
5382                 set_irg_inline_property(irg, irg_inline_forced);
5383         }
5384         if (decl_modifiers & DM_NOINLINE) {
5385                 /* TRUE if the declaration includes the Microsoft
5386                    __declspec(noinline) specifier. */
5387                 set_irg_inline_property(irg, irg_inline_forbidden);
5388         }
5389 }
5390
5391 static void add_function_pointer(ir_type *segment, ir_entity *method,
5392                                  const char *unique_template)
5393 {
5394         ir_type   *method_type  = get_entity_type(method);
5395         ident     *id           = id_unique(unique_template);
5396         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5397
5398         ident     *ide          = id_unique(unique_template);
5399         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5400         ir_graph  *irg          = get_const_code_irg();
5401         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5402                                                            method, NULL);
5403
5404         set_entity_compiler_generated(ptr, 1);
5405         set_entity_variability(ptr, variability_constant);
5406         set_atomic_ent_value(ptr, val);
5407 }
5408
5409 /**
5410  * Generate possible IJmp branches to a given label block.
5411  */
5412 static void gen_ijmp_branches(ir_node *block) {
5413         ir_node *ijmp;
5414         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5415                 add_immBlock_pred(block, ijmp);
5416         }
5417 }
5418
5419 /**
5420  * Create code for a function.
5421  */
5422 static void create_function(declaration_t *declaration)
5423 {
5424         ir_entity *function_entity = get_function_entity(declaration);
5425
5426         if (declaration->init.statement == NULL)
5427                 return;
5428
5429         if (declaration->modifiers & DM_CONSTRUCTOR) {
5430                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5431                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5432         }
5433         if (declaration->modifiers & DM_DESTRUCTOR) {
5434                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5435                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5436         }
5437
5438         current_function_decl = declaration;
5439         current_function_name = NULL;
5440         current_funcsig       = NULL;
5441
5442         assert(all_labels == NULL);
5443         all_labels = NEW_ARR_F(declaration_t *, 0);
5444         ijmp_list  = NULL;
5445
5446         int       n_local_vars = get_function_n_local_vars(declaration);
5447         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5448
5449         ir_graph *old_current_function = current_function;
5450         current_function = irg;
5451
5452         set_irg_fp_model(irg, firm_opt.fp_model);
5453         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5454         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5455
5456         ir_node *first_block = get_cur_block();
5457
5458         /* set inline flags */
5459         if (declaration->is_inline)
5460                 set_irg_inline_property(irg, irg_inline_recomended);
5461         handle_decl_modifier_irg(irg, declaration->modifiers);
5462
5463         next_value_number_function = 0;
5464         initialize_function_parameters(declaration);
5465
5466         statement_to_firm(declaration->init.statement);
5467
5468         ir_node *end_block = get_irg_end_block(irg);
5469
5470         /* do we have a return statement yet? */
5471         if (get_cur_block() != NULL) {
5472                 type_t *type = skip_typeref(declaration->type);
5473                 assert(is_type_function(type));
5474                 const function_type_t *func_type   = &type->function;
5475                 const type_t          *return_type
5476                         = skip_typeref(func_type->return_type);
5477
5478                 ir_node *ret;
5479                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5480                         ret = new_Return(get_store(), 0, NULL);
5481                 } else {
5482                         ir_mode *mode;
5483                         if (is_type_scalar(return_type)) {
5484                                 mode = get_ir_mode(func_type->return_type);
5485                         } else {
5486                                 mode = mode_P_data;
5487                         }
5488
5489                         ir_node *in[1];
5490                         /* §5.1.2.2.3 main implicitly returns 0 */
5491                         if (strcmp(declaration->symbol->string, "main") == 0) {
5492                                 in[0] = new_Const(mode, get_mode_null(mode));
5493                         } else {
5494                                 in[0] = new_Unknown(mode);
5495                         }
5496                         ret = new_Return(get_store(), 1, in);
5497                 }
5498                 add_immBlock_pred(end_block, ret);
5499         }
5500
5501         bool has_computed_gotos = false;
5502         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5503                 declaration_t *label = all_labels[i];
5504                 if (label->address_taken) {
5505                         gen_ijmp_branches(label->v.block);
5506                         has_computed_gotos = true;
5507                 }
5508                 mature_immBlock(label->v.block);
5509         }
5510         if (has_computed_gotos) {
5511                 /* if we have computed goto's in the function, we cannot inline it */
5512                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5513                         warningf(&declaration->source_position,
5514                                 "function '%Y' can never be inlined because it contains a computed goto",
5515                                 declaration->symbol);
5516                 }
5517                 set_irg_inline_property(irg, irg_inline_forbidden);
5518         }
5519
5520         DEL_ARR_F(all_labels);
5521         all_labels = NULL;
5522
5523         mature_immBlock(first_block);
5524         mature_immBlock(end_block);
5525
5526         irg_finalize_cons(irg);
5527
5528         /* finalize the frame type */
5529         ir_type *frame_type = get_irg_frame_type(irg);
5530         int      n          = get_compound_n_members(frame_type);
5531         int      align_all  = 4;
5532         int      offset     = 0;
5533         for(int i = 0; i < n; ++i) {
5534                 ir_entity *entity      = get_compound_member(frame_type, i);
5535                 ir_type   *entity_type = get_entity_type(entity);
5536
5537                 int align = get_type_alignment_bytes(entity_type);
5538                 if (align > align_all)
5539                         align_all = align;
5540                 int misalign = 0;
5541                 if (align > 0) {
5542                         misalign  = offset % align;
5543                         if (misalign > 0) {
5544                                 offset += align - misalign;
5545                         }
5546                 }
5547
5548                 set_entity_offset(entity, offset);
5549                 offset += get_type_size_bytes(entity_type);
5550         }
5551         set_type_size_bytes(frame_type, offset);
5552         set_type_alignment_bytes(frame_type, align_all);
5553
5554         irg_vrfy(irg);
5555         current_function = old_current_function;
5556 }
5557
5558 static void scope_to_firm(scope_t *scope)
5559 {
5560         /* first pass: create declarations */
5561         declaration_t *declaration = scope->declarations;
5562         for( ; declaration != NULL; declaration = declaration->next) {
5563                 if (declaration->namespc != NAMESPACE_NORMAL)
5564                         continue;
5565                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5566                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5567                         continue;
5568                 if (declaration->symbol == NULL)
5569                         continue;
5570
5571                 type_t *type = skip_typeref(declaration->type);
5572                 if (is_type_function(type)) {
5573                         get_function_entity(declaration);
5574                 } else {
5575                         create_global_variable(declaration);
5576                 }
5577         }
5578
5579         /* second pass: create code/initializers */
5580         declaration = scope->declarations;
5581         for( ; declaration != NULL; declaration = declaration->next) {
5582                 if (declaration->namespc != NAMESPACE_NORMAL)
5583                         continue;
5584                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5585                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5586                         continue;
5587                 if (declaration->symbol == NULL)
5588                         continue;
5589
5590                 type_t *type = declaration->type;
5591                 if (type->kind == TYPE_FUNCTION) {
5592                         create_function(declaration);
5593                         declaration_t *inner;
5594                         for (inner = next_inner_function(); inner != NULL;
5595                              inner = next_inner_function())
5596                                  create_function(inner);
5597                 } else {
5598                         assert(declaration->declaration_kind
5599                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5600                         current_ir_graph = get_const_code_irg();
5601                         create_declaration_initializer(declaration);
5602                 }
5603         }
5604 }
5605
5606 static void set_be_option(const char *option)
5607 {
5608         int res = firm_be_option(option);
5609         assert(res);
5610 }
5611
5612 void init_ast2firm(void)
5613 {
5614         obstack_init(&asm_obst);
5615         init_atomic_modes();
5616
5617         id_underscore = new_id_from_chars("_", 1);
5618         id_imp        = new_id_from_chars("__imp_", 6);
5619
5620         /* OS option must be set to the backend */
5621         switch (firm_opt.os_support) {
5622         case OS_SUPPORT_MINGW:
5623                 create_ld_ident = create_ld_ident_win32;
5624                 set_be_option("ia32-gasmode=mingw");
5625                 break;
5626         case OS_SUPPORT_LINUX:
5627                 create_ld_ident = create_ld_ident_linux_elf;
5628                 set_be_option("ia32-gasmode=elf");
5629                 break;
5630         case OS_SUPPORT_MACHO:
5631                 create_ld_ident = create_ld_ident_macho;
5632                 set_be_option("ia32-gasmode=macho");
5633                 set_be_option("ia32-stackalign=4");
5634                 set_be_option("pic");
5635                 break;
5636         }
5637
5638         /* create idents for all known runtime functions */
5639         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5640                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5641         }
5642
5643         entitymap_init(&entitymap);
5644 }
5645
5646 static void init_ir_types(void)
5647 {
5648         static int ir_types_initialized = 0;
5649         if (ir_types_initialized)
5650                 return;
5651         ir_types_initialized = 1;
5652
5653         ir_type_int        = get_ir_type(type_int);
5654         ir_type_const_char = get_ir_type(type_const_char);
5655         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5656         ir_type_void       = get_ir_type(type_void);
5657 }
5658
5659 void exit_ast2firm(void)
5660 {
5661         entitymap_destroy(&entitymap);
5662         obstack_free(&asm_obst, NULL);
5663 }
5664
5665 static void global_asm_to_firm(statement_t *s)
5666 {
5667         for (; s != NULL; s = s->base.next) {
5668                 assert(s->kind == STATEMENT_ASM);
5669
5670                 char const *const text = s->asms.asm_text.begin;
5671                 size_t            size = s->asms.asm_text.size;
5672
5673                 /* skip the last \0 */
5674                 if (text[size - 1] == '\0')
5675                         --size;
5676
5677                 ident *const id = new_id_from_chars(text, size);
5678                 add_irp_asm(id);
5679         }
5680 }
5681
5682 void translation_unit_to_firm(translation_unit_t *unit)
5683 {
5684         /* just to be sure */
5685         continue_label      = NULL;
5686         break_label         = NULL;
5687         current_switch_cond = NULL;
5688
5689         init_ir_types();
5690
5691         scope_to_firm(&unit->scope);
5692         global_asm_to_firm(unit->global_asm);
5693
5694         current_ir_graph = NULL;
5695 }