nsz Git - cparser/blob - ast2firm.c

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