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 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  48
  49 /* some idents needed for name mangling */
  50 static ident *id_underscore;
  51 static ident *id_imp;
  52
  53 static ir_type *ir_type_const_char;
  54 static ir_type *ir_type_wchar_t;
  55 static ir_type *ir_type_void;
  56 static ir_type *ir_type_int;
  57
  58 static type_t *type_const_char;
  59
  60 static int       next_value_number_function;
  61 static ir_node  *continue_label;
  62 static ir_node  *break_label;
  63 static ir_node  *current_switch_cond;
  64 static bool      saw_default_label;
  65 static ir_node **imature_blocks;
  66 static bool constant_folding;
  67
  68 static const declaration_t *current_function_decl;
  69 static ir_node             *current_function_name;
  70 static ir_node             *current_funcsig;
  71
  72 static entitymap_t  entitymap;
  73
  74 static struct obstack asm_obst;
  75
  76 typedef enum declaration_kind_t {
  77         DECLARATION_KIND_UNKNOWN,
  78         DECLARATION_KIND_FUNCTION,
  79         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  80         DECLARATION_KIND_GLOBAL_VARIABLE,
  81         DECLARATION_KIND_LOCAL_VARIABLE,
  82         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  83         DECLARATION_KIND_COMPOUND_MEMBER,
  84         DECLARATION_KIND_LABEL_BLOCK,
  85         DECLARATION_KIND_ENUM_ENTRY,
  86         DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE,
  87         DECLARATION_KIND_COMPOUND_TYPE_COMPLETE,
  88         DECLARATION_KIND_TYPE
  89 } declaration_kind_t;
  90
  91 static ir_type *get_ir_type(type_t *type);
  92 static ir_type *get_ir_type_incomplete(type_t *type);
  93 static int count_decls_in_stmts(const statement_t *stmt);
  94
  95 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  96 {
  97         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  98
  99         warningf(&declaration->source_position,
 100                  "variable '%#T' might be used uninitialized",
 101                  declaration->type, declaration->symbol);
 102         return new_r_Unknown(irg, mode);
 103 }
 104
 105 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 106 {
 107         const source_position_t *pos = (const source_position_t*) dbg;
 108         if (pos == NULL)
 109                 return 0;
 110         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 111                                    pos->linenr);
 112 }
 113
 114 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 115 {
 116         const source_position_t *pos = (const source_position_t*) dbg;
 117         if (pos == NULL)
 118                 return NULL;
 119         if (line != NULL)
 120                 *line = pos->linenr;
 121         return pos->input_name;
 122 }
 123
 124 static dbg_info *get_dbg_info(const source_position_t *pos)
 125 {
 126         return (dbg_info*) pos;
 127 }
 128
 129 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 130
 131 static ir_mode *mode_int, *mode_uint;
 132
 133 static ir_node *_expression_to_firm(const expression_t *expression);
 134 static ir_node *expression_to_firm(const expression_t *expression);
 135 static inline ir_mode *get_ir_mode(type_t *type);
 136 static void create_local_declaration(declaration_t *declaration);
 137
 138 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 139 {
 140         unsigned flags = get_atomic_type_flags(kind);
 141         unsigned size  = get_atomic_type_size(kind);
 142         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 143                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 144                 char            name[64];
 145                 ir_mode_sort    sort;
 146                 unsigned        bit_size     = size * 8;
 147                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 148                 ir_mode_arithmetic arithmetic;
 149                 unsigned        modulo_shift;
 150
 151                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 152                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 153                         snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
 154                         sort         = irms_int_number;
 155                         arithmetic   = irma_twos_complement;
 156                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 157                 } else {
 158                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 159                         snprintf(name, sizeof(name), "f%d", bit_size);
 160                         sort         = irms_float_number;
 161                         arithmetic   = irma_ieee754;
 162                         modulo_shift = 0;
 163                 }
 164                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 165                                    modulo_shift);
 166         }
 167
 168         return NULL;
 169 }
 170
 171 /**
 172  * Initialises the atomic modes depending on the machine size.
 173  */
 174 static void init_atomic_modes(void)
 175 {
 176         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 177                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 178         }
 179         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 180         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 181
 182         /* there's no real void type in firm */
 183         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 184
 185         /* initialize pointer modes */
 186         char            name[64];
 187         ir_mode_sort    sort         = irms_reference;
 188         unsigned        bit_size     = machine_size;
 189         bool            is_signed    = 0;
 190         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 191         unsigned        modulo_shift
 192                 = bit_size < machine_size ? machine_size : bit_size;
 193
 194         snprintf(name, sizeof(name), "p%d", machine_size);
 195         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 196                                         modulo_shift);
 197
 198         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 199         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 200
 201         /* Hmm, pointers should be machine size */
 202         set_modeP_data(ptr_mode);
 203         set_modeP_code(ptr_mode);
 204 }
 205
 206 static unsigned get_compound_type_size(compound_type_t *type)
 207 {
 208         ir_type *irtype = get_ir_type((type_t*) type);
 209         return get_type_size_bytes(irtype);
 210 }
 211
 212 static unsigned get_array_type_size(array_type_t *type)
 213 {
 214         assert(!type->is_vla);
 215         ir_type *irtype = get_ir_type((type_t*) type);
 216         return get_type_size_bytes(irtype);
 217 }
 218
 219
 220 static unsigned get_type_size_const(type_t *type)
 221 {
 222         switch(type->kind) {
 223         case TYPE_ERROR:
 224                 panic("error type occurred");
 225         case TYPE_ATOMIC:
 226                 return get_atomic_type_size(type->atomic.akind);
 227         case TYPE_COMPLEX:
 228                 return 2 * get_atomic_type_size(type->complex.akind);
 229         case TYPE_IMAGINARY:
 230                 return get_atomic_type_size(type->imaginary.akind);
 231         case TYPE_ENUM:
 232                 return get_mode_size_bytes(mode_int);
 233         case TYPE_COMPOUND_UNION:
 234         case TYPE_COMPOUND_STRUCT:
 235                 return get_compound_type_size(&type->compound);
 236         case TYPE_FUNCTION:
 237                 /* just a pointer to the function */
 238                 return get_mode_size_bytes(mode_P_code);
 239         case TYPE_POINTER:
 240                 return get_mode_size_bytes(mode_P_data);
 241         case TYPE_ARRAY:
 242                 return get_array_type_size(&type->array);
 243         case TYPE_BUILTIN:
 244                 return get_type_size_const(type->builtin.real_type);
 245         case TYPE_BITFIELD:
 246                 panic("type size of bitfield request");
 247         case TYPE_TYPEDEF:
 248         case TYPE_TYPEOF:
 249         case TYPE_INVALID:
 250                 break;
 251         }
 252         panic("Trying to determine size of invalid type");
 253 }
 254
 255 static ir_node *get_type_size(type_t *type)
 256 {
 257         type = skip_typeref(type);
 258
 259         if (is_type_array(type) && type->array.is_vla) {
 260                 ir_node *size_node = type->array.size_node;
 261                 if (size_node == NULL) {
 262                         size_node = expression_to_firm(type->array.size_expression);
 263                         assert(!is_Const(size_node));
 264                         type->array.size_node = size_node;
 265                 }
 266
 267                 ir_node *elem_size = get_type_size(type->array.element_type);
 268                 ir_mode *mode      = get_irn_mode(size_node);
 269                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 270                 return real_size;
 271         }
 272
 273         ir_mode *mode = get_ir_mode(type_size_t);
 274         symconst_symbol sym;
 275         sym.type_p = get_ir_type(type);
 276         return new_SymConst(mode, sym, symconst_type_size);
 277 }
 278
 279 static unsigned count_parameters(const function_type_t *function_type)
 280 {
 281         unsigned count = 0;
 282
 283         function_parameter_t *parameter = function_type->parameters;
 284         for ( ; parameter != NULL; parameter = parameter->next) {
 285                 ++count;
 286         }
 287
 288         return count;
 289 }
 290
 291 /**
 292  * Creates a Firm type for an atomic type
 293  */
 294 static ir_type *create_atomic_type(const atomic_type_t *type)
 295 {
 296         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 297         atomic_type_kind_t  kind      = type->akind;
 298         ir_mode            *mode      = _atomic_modes[kind];
 299         ident              *id        = get_mode_ident(mode);
 300         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 301
 302         set_type_alignment_bytes(irtype, type->base.alignment);
 303
 304         return irtype;
 305 }
 306
 307 /**
 308  * Creates a Firm type for a complex type
 309  */
 310 static ir_type *create_complex_type(const complex_type_t *type)
 311 {
 312         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 313         atomic_type_kind_t  kind      = type->akind;
 314         ir_mode            *mode      = _atomic_modes[kind];
 315         ident              *id        = get_mode_ident(mode);
 316
 317         (void) id;
 318         (void) dbgi;
 319
 320         /* FIXME: finish the array */
 321         return NULL;
 322 }
 323
 324 /**
 325  * Creates a Firm type for an imaginary type
 326  */
 327 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 328 {
 329         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 330         atomic_type_kind_t  kind      = type->akind;
 331         ir_mode            *mode      = _atomic_modes[kind];
 332         ident              *id        = get_mode_ident(mode);
 333         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 334
 335         set_type_alignment_bytes(irtype, type->base.alignment);
 336
 337         return irtype;
 338 }
 339
 340 /**
 341  * return type of a parameter (and take transparent union gnu extension into
 342  * account)
 343  */
 344 static type_t *get_parameter_type(type_t *type)
 345 {
 346         type = skip_typeref(type);
 347         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 348                 declaration_t *decl = type->compound.declaration;
 349                 type                = decl->scope.declarations->type;
 350         }
 351
 352         return type;
 353 }
 354
 355 static ir_type *create_method_type(const function_type_t *function_type)
 356 {
 357         type_t  *return_type  = function_type->return_type;
 358
 359         ident   *id           = id_unique("functiontype.%u");
 360         int      n_parameters = count_parameters(function_type);
 361         int      n_results    = return_type == type_void ? 0 : 1;
 362         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 363         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 364
 365         if (return_type != type_void) {
 366                 ir_type *restype = get_ir_type(return_type);
 367                 set_method_res_type(irtype, 0, restype);
 368         }
 369
 370         function_parameter_t *parameter = function_type->parameters;
 371         int                   n         = 0;
 372         for ( ; parameter != NULL; parameter = parameter->next) {
 373                 type_t  *type     = get_parameter_type(parameter->type);
 374                 ir_type *p_irtype = get_ir_type(type);
 375                 set_method_param_type(irtype, n, p_irtype);
 376                 ++n;
 377         }
 378
 379         if (function_type->variadic || function_type->unspecified_parameters) {
 380                 set_method_variadicity(irtype, variadicity_variadic);
 381         }
 382
 383         return irtype;
 384 }
 385
 386 static ir_type *create_pointer_type(pointer_type_t *type)
 387 {
 388         type_t   *points_to    = type->points_to;
 389         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 390         dbg_info *dbgi         = get_dbg_info(&type->base.source_position);
 391         ir_type  *ir_type      = new_d_type_pointer(id_unique("pointer.%u"),
 392                                                     ir_points_to, mode_P_data, dbgi);
 393
 394         return ir_type;
 395 }
 396
 397 static ir_type *create_array_type(array_type_t *type)
 398 {
 399         type_t  *element_type    = type->element_type;
 400         ir_type *ir_element_type = get_ir_type(element_type);
 401
 402         ident    *id      = id_unique("array.%u");
 403         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 404         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 405
 406         const int align = get_type_alignment_bytes(ir_element_type);
 407         set_type_alignment_bytes(ir_type, align);
 408
 409         if (type->size_constant) {
 410                 int n_elements = type->size;
 411
 412                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 413
 414                 size_t elemsize = get_type_size_bytes(ir_element_type);
 415                 if (elemsize % align > 0) {
 416                         elemsize += align - (elemsize % align);
 417                 }
 418                 set_type_size_bytes(ir_type, n_elements * elemsize);
 419         } else {
 420                 set_array_lower_bound_int(ir_type, 0, 0);
 421         }
 422         set_type_state(ir_type, layout_fixed);
 423
 424         return ir_type;
 425 }
 426
 427 /**
 428  * Return the signed integer type of size bits.
 429  *
 430  * @param size   the size
 431  */
 432 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 433                                                  unsigned size)
 434 {
 435         static ir_mode *s_modes[64 + 1] = {NULL, };
 436         ir_type *res;
 437         ir_mode *mode;
 438
 439         if (size <= 0 || size > 64)
 440                 return NULL;
 441
 442         mode = s_modes[size];
 443         if (mode == NULL) {
 444                 char name[32];
 445
 446                 snprintf(name, sizeof(name), "bf_I%u", size);
 447                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 448                                    size <= 32 ? 32 : size );
 449                 s_modes[size] = mode;
 450         }
 451
 452         char name[32];
 453         snprintf(name, sizeof(name), "I%u", size);
 454         ident *id = new_id_from_str(name);
 455         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 456         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 457         set_primitive_base_type(res, base_tp);
 458
 459         return res;
 460 }
 461
 462 /**
 463  * Return the unsigned integer type of size bits.
 464  *
 465  * @param size   the size
 466  */
 467 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 468                                                    unsigned size)
 469 {
 470         static ir_mode *u_modes[64 + 1] = {NULL, };
 471         ir_type *res;
 472         ir_mode *mode;
 473
 474         if (size <= 0 || size > 64)
 475                 return NULL;
 476
 477         mode = u_modes[size];
 478         if (mode == NULL) {
 479                 char name[32];
 480
 481                 snprintf(name, sizeof(name), "bf_U%u", size);
 482                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 483                                    size <= 32 ? 32 : size );
 484                 u_modes[size] = mode;
 485         }
 486
 487         char name[32];
 488
 489         snprintf(name, sizeof(name), "U%u", size);
 490         ident *id = new_id_from_str(name);
 491         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 492         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 493         set_primitive_base_type(res, base_tp);
 494
 495         return res;
 496 }
 497
 498 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 499 {
 500         type_t *base = skip_typeref(type->base_type);
 501         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 502         ir_type *irbase = get_ir_type(base);
 503
 504         unsigned size = fold_constant(type->size);
 505
 506         assert(!is_type_float(base));
 507         if (is_type_signed(base)) {
 508                 return get_signed_int_type_for_bit_size(irbase, size);
 509         } else {
 510                 return get_unsigned_int_type_for_bit_size(irbase, size);
 511         }
 512 }
 513
 514 #define INVALID_TYPE ((ir_type_ptr)-1)
 515
 516 enum {
 517         COMPOUND_IS_STRUCT = false,
 518         COMPOUND_IS_UNION  = true
 519 };
 520
 521 /**
 522  * Construct firm type from ast struct type.
 523  *
 524  * As anonymous inner structs get flattened to a single firm type, we might get
 525  * irtype, outer_offset and out_align passed (they represent the position of
 526  * the anonymous inner struct inside the resulting firm struct)
 527  */
 528 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 529                                      size_t *outer_offset, size_t *outer_align,
 530                                      bool incomplete, bool is_union)
 531 {
 532         declaration_t      *declaration = type->declaration;
 533         declaration_kind_t  kind        = (declaration_kind_t)declaration->declaration_kind;
 534
 535         if (kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
 536                         || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE
 537                                 && incomplete))
 538                 return declaration->v.irtype;
 539
 540         size_t align_all  = 1;
 541         size_t offset     = 0;
 542         size_t bit_offset = 0;
 543         size_t size       = 0;
 544
 545         if (irtype == NULL) {
 546                 symbol_t *symbol = declaration->symbol;
 547                 ident    *id;
 548                 if (symbol != NULL) {
 549                         id = new_id_from_str(symbol->string);
 550                 } else {
 551                         if (is_union) {
 552                                 id = id_unique("__anonymous_union.%u");
 553                         } else {
 554                                 id = id_unique("__anonymous_struct.%u");
 555                         }
 556                 }
 557                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 558
 559                 if (is_union) {
 560                         irtype = new_d_type_union(id, dbgi);
 561                 } else {
 562                         irtype = new_d_type_struct(id, dbgi);
 563                 }
 564
 565                 declaration->declaration_kind
 566                         = DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE;
 567                 declaration->v.irtype         = irtype;
 568                 //type->base.firm_type          = irtype;
 569         } else {
 570                 offset    = *outer_offset;
 571                 align_all = *outer_align;
 572         }
 573
 574         if (incomplete)
 575                 return irtype;
 576
 577         declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE;
 578
 579         declaration_t *entry = declaration->scope.declarations;
 580         for( ; entry != NULL; entry = entry->next) {
 581                 if (entry->namespc != NAMESPACE_NORMAL)
 582                         continue;
 583
 584                 size_t prev_offset = offset;
 585
 586                 symbol_t *symbol     = entry->symbol;
 587                 type_t   *entry_type = skip_typeref(entry->type);
 588                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 589
 590                 ident    *ident;
 591                 if (symbol != NULL) {
 592                         ident = new_id_from_str(symbol->string);
 593                 } else {
 594                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 595                                 create_compound_type(&entry_type->compound, irtype, &offset,
 596                                                      &align_all, false, COMPOUND_IS_STRUCT);
 597                                 goto finished_member;
 598                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 599                                 create_compound_type(&entry_type->compound, irtype, &offset,
 600                                                      &align_all, false, COMPOUND_IS_UNION);
 601                                 goto finished_member;
 602                         } else {
 603                                 assert(entry_type->kind == TYPE_BITFIELD);
 604                         }
 605                         ident = id_unique("anon.%u");
 606                 }
 607
 608                 ir_type *base_irtype;
 609                 if (entry_type->kind == TYPE_BITFIELD) {
 610                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 611                 } else {
 612                         base_irtype = get_ir_type(entry_type);
 613                 }
 614
 615                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 616                 size_t misalign        = offset % entry_alignment;
 617
 618                 ir_type   *entry_irtype = get_ir_type(entry_type);
 619                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 620
 621                 size_t base;
 622                 size_t bits_remainder;
 623                 if (entry_type->kind == TYPE_BITFIELD) {
 624                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 625                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 626
 627                         if (size_bits > rest_size_bits) {
 628                                 /* start a new bucket */
 629                                 offset     += entry_alignment - misalign;
 630                                 bit_offset  = 0;
 631
 632                                 base           = offset;
 633                                 bits_remainder = 0;
 634                         } else {
 635                                 /* put into current bucket */
 636                                 base           = offset - misalign;
 637                                 bits_remainder = misalign * 8 + bit_offset;
 638                         }
 639
 640                         offset     += size_bits / 8;
 641                         bit_offset  = bit_offset + (size_bits % 8);
 642                 } else {
 643                         size_t entry_size = get_type_size_bytes(base_irtype);
 644                         if (misalign > 0 || bit_offset > 0)
 645                                 offset += entry_alignment - misalign;
 646
 647                         base           = offset;
 648                         bits_remainder = 0;
 649                         offset        += entry_size;
 650                         bit_offset     = 0;
 651                 }
 652
 653                 if (entry_alignment > align_all) {
 654                         if (entry_alignment % align_all != 0) {
 655                                 panic("uneven alignments not supported yet");
 656                         }
 657                         align_all = entry_alignment;
 658                 }
 659
 660                 set_entity_offset(entity, base);
 661                 set_entity_offset_bits_remainder(entity,
 662                                                  (unsigned char) bits_remainder);
 663                 //add_struct_member(irtype, entity);
 664                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 665                 assert(entry->v.entity == NULL);
 666                 entry->v.entity         = entity;
 667
 668 finished_member:
 669                 if (is_union) {
 670                         size_t entry_size = offset - prev_offset;
 671                         if (entry_size > size) {
 672                                 size = entry_size;
 673                         }
 674                         offset     = 0;
 675                         bit_offset = 0;
 676                 }
 677         }
 678
 679         if (!is_union) {
 680                 size = offset;
 681         }
 682
 683         size_t misalign = offset % align_all;
 684         if (misalign > 0 || bit_offset > 0) {
 685                 size += align_all - misalign;
 686         }
 687
 688         if (outer_offset != NULL) {
 689                 if (!is_union) {
 690                         *outer_offset = offset;
 691                 } else {
 692                         *outer_offset += size;
 693                 }
 694
 695                 if (align_all > *outer_align) {
 696                         if (align_all % *outer_align != 0) {
 697                                 panic("uneven alignments not supported yet");
 698                         }
 699                         *outer_align = align_all;
 700                 }
 701         } else {
 702                 set_type_alignment_bytes(irtype, align_all);
 703                 set_type_size_bytes(irtype, size);
 704                 set_type_state(irtype, layout_fixed);
 705         }
 706
 707         return irtype;
 708 }
 709
 710 static ir_type *create_enum_type(enum_type_t *const type)
 711 {
 712         type->base.firm_type = ir_type_int;
 713
 714         ir_mode *const mode    = mode_int;
 715         tarval  *const one     = get_mode_one(mode);
 716         tarval  *      tv_next = get_tarval_null(mode);
 717
 718         bool constant_folding_old = constant_folding;
 719         constant_folding = true;
 720
 721         declaration_t *declaration = type->declaration->next;
 722         for (; declaration != NULL; declaration = declaration->next) {
 723                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 724                         break;
 725
 726                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 727
 728                 expression_t *const init = declaration->init.enum_value;
 729                 if (init != NULL) {
 730                         ir_node *const cnst = expression_to_firm(init);
 731                         if (!is_Const(cnst)) {
 732                                 panic("couldn't fold constant");
 733                         }
 734                         tv_next = get_Const_tarval(cnst);
 735                 }
 736                 declaration->v.enum_val = tv_next;
 737                 tv_next = tarval_add(tv_next, one);
 738         }
 739
 740         constant_folding = constant_folding_old;
 741
 742         return ir_type_int;
 743 }
 744
 745 static ir_type *get_ir_type_incomplete(type_t *type)
 746 {
 747         assert(type != NULL);
 748         type = skip_typeref(type);
 749
 750         if (type->base.firm_type != NULL) {
 751                 assert(type->base.firm_type != INVALID_TYPE);
 752                 return type->base.firm_type;
 753         }
 754
 755         switch (type->kind) {
 756         case TYPE_COMPOUND_STRUCT:
 757                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 758                                             true, COMPOUND_IS_STRUCT);
 759         case TYPE_COMPOUND_UNION:
 760                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 761                                             true, COMPOUND_IS_UNION);
 762         default:
 763                 return get_ir_type(type);
 764         }
 765 }
 766
 767 static ir_type *get_ir_type(type_t *type)
 768 {
 769         assert(type != NULL);
 770
 771         type = skip_typeref(type);
 772
 773         if (type->base.firm_type != NULL) {
 774                 assert(type->base.firm_type != INVALID_TYPE);
 775                 return type->base.firm_type;
 776         }
 777
 778         ir_type *firm_type = NULL;
 779         switch (type->kind) {
 780         case TYPE_ERROR:
 781                 panic("error type occurred");
 782         case TYPE_ATOMIC:
 783                 firm_type = create_atomic_type(&type->atomic);
 784                 break;
 785         case TYPE_COMPLEX:
 786                 firm_type = create_complex_type(&type->complex);
 787                 break;
 788         case TYPE_IMAGINARY:
 789                 firm_type = create_imaginary_type(&type->imaginary);
 790                 break;
 791         case TYPE_FUNCTION:
 792                 firm_type = create_method_type(&type->function);
 793                 break;
 794         case TYPE_POINTER:
 795                 firm_type = create_pointer_type(&type->pointer);
 796                 break;
 797         case TYPE_ARRAY:
 798                 firm_type = create_array_type(&type->array);
 799                 break;
 800         case TYPE_COMPOUND_STRUCT:
 801                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 802                                                  false, COMPOUND_IS_STRUCT);
 803                 break;
 804         case TYPE_COMPOUND_UNION:
 805                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 806                                                  false, COMPOUND_IS_UNION);
 807                 break;
 808         case TYPE_ENUM:
 809                 firm_type = create_enum_type(&type->enumt);
 810                 break;
 811         case TYPE_BUILTIN:
 812                 firm_type = get_ir_type(type->builtin.real_type);
 813                 break;
 814         case TYPE_BITFIELD:
 815                 firm_type = create_bitfield_type(&type->bitfield);
 816                 break;
 817
 818         case TYPE_TYPEOF:
 819         case TYPE_TYPEDEF:
 820         case TYPE_INVALID:
 821                 break;
 822         }
 823         if (firm_type == NULL)
 824                 panic("unknown type found");
 825
 826         type->base.firm_type = firm_type;
 827         return firm_type;
 828 }
 829
 830 static inline ir_mode *get_ir_mode(type_t *type)
 831 {
 832         ir_type *irtype = get_ir_type(type);
 833
 834         /* firm doesn't report a mode for arrays somehow... */
 835         if (is_Array_type(irtype)) {
 836                 return mode_P_data;
 837         }
 838
 839         ir_mode *mode = get_type_mode(irtype);
 840         assert(mode != NULL);
 841         return mode;
 842 }
 843
 844 /** Names of the runtime functions. */
 845 static const struct {
 846         int        id;           /**< the rts id */
 847         int        n_res;        /**< number of return values */
 848         const char *name;        /**< the name of the rts function */
 849         int        n_params;     /**< number of parameters */
 850         unsigned   flags;        /**< language flags */
 851 } rts_data[] = {
 852         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 853         { rts_abort,      0, "abort",        0, _C89 },
 854         { rts_alloca,     1, "alloca",       1, _ALL },
 855         { rts_abs,        1, "abs",          1, _C89 },
 856         { rts_labs,       1, "labs",         1, _C89 },
 857         { rts_llabs,      1, "llabs",        1, _C99 },
 858         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 859
 860         { rts_fabs,       1, "fabs",         1, _C89 },
 861         { rts_sqrt,       1, "sqrt",         1, _C89 },
 862         { rts_cbrt,       1, "cbrt",         1, _C99 },
 863         { rts_exp,        1, "exp",          1, _C89 },
 864         { rts_exp2,       1, "exp2",         1, _C89 },
 865         { rts_exp10,      1, "exp10",        1, _GNUC },
 866         { rts_log,        1, "log",          1, _C89 },
 867         { rts_log2,       1, "log2",         1, _C89 },
 868         { rts_log10,      1, "log10",        1, _C89 },
 869         { rts_pow,        1, "pow",          2, _C89 },
 870         { rts_sin,        1, "sin",          1, _C89 },
 871         { rts_cos,        1, "cos",          1, _C89 },
 872         { rts_tan,        1, "tan",          1, _C89 },
 873         { rts_asin,       1, "asin",         1, _C89 },
 874         { rts_acos,       1, "acos",         1, _C89 },
 875         { rts_atan,       1, "atan",         1, _C89 },
 876         { rts_sinh,       1, "sinh",         1, _C89 },
 877         { rts_cosh,       1, "cosh",         1, _C89 },
 878         { rts_tanh,       1, "tanh",         1, _C89 },
 879
 880         { rts_fabsf,      1, "fabsf",        1, _C99 },
 881         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 882         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 883         { rts_expf,       1, "expf",         1, _C99 },
 884         { rts_exp2f,      1, "exp2f",        1, _C99 },
 885         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 886         { rts_logf,       1, "logf",         1, _C99 },
 887         { rts_log2f,      1, "log2f",        1, _C99 },
 888         { rts_log10f,     1, "log10f",       1, _C99 },
 889         { rts_powf,       1, "powf",         2, _C99 },
 890         { rts_sinf,       1, "sinf",         1, _C99 },
 891         { rts_cosf,       1, "cosf",         1, _C99 },
 892         { rts_tanf,       1, "tanf",         1, _C99 },
 893         { rts_asinf,      1, "asinf",        1, _C99 },
 894         { rts_acosf,      1, "acosf",        1, _C99 },
 895         { rts_atanf,      1, "atanf",        1, _C99 },
 896         { rts_sinhf,      1, "sinhf",        1, _C99 },
 897         { rts_coshf,      1, "coshf",        1, _C99 },
 898         { rts_tanhf,      1, "tanhf",        1, _C99 },
 899
 900         { rts_fabsl,      1, "fabsl",        1, _C99 },
 901         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 902         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 903         { rts_expl,       1, "expl",         1, _C99 },
 904         { rts_exp2l,      1, "exp2l",        1, _C99 },
 905         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 906         { rts_logl,       1, "logl",         1, _C99 },
 907         { rts_log2l,      1, "log2l",        1, _C99 },
 908         { rts_log10l,     1, "log10l",       1, _C99 },
 909         { rts_powl,       1, "powl",         2, _C99 },
 910         { rts_sinl,       1, "sinl",         1, _C99 },
 911         { rts_cosl,       1, "cosl",         1, _C99 },
 912         { rts_tanl,       1, "tanl",         1, _C99 },
 913         { rts_asinl,      1, "asinl",        1, _C99 },
 914         { rts_acosl,      1, "acosl",        1, _C99 },
 915         { rts_atanl,      1, "atanl",        1, _C99 },
 916         { rts_sinhl,      1, "sinhl",        1, _C99 },
 917         { rts_coshl,      1, "coshl",        1, _C99 },
 918         { rts_tanhl,      1, "tanhl",        1, _C99 },
 919
 920         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 921         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 922         { rts_strcmp,     1, "strcmp",       2, _C89 },
 923         { rts_strncmp,    1, "strncmp",      3, _C89 }
 924 };
 925
 926 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 927
 928 /**
 929  * Mangles an entity linker (ld) name for win32 usage.
 930  *
 931  * @param ent          the entity to be mangled
 932  * @param declaration  the declaration
 933  */
 934 static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration)
 935 {
 936         ident *id;
 937
 938         if (is_Method_type(get_entity_type(ent)))
 939                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 940         else {
 941                 /* always add an underscore in win32 */
 942                 id = mangle(id_underscore, get_entity_ident(ent));
 943         }
 944
 945         decl_modifiers_t decl_modifiers = declaration->modifiers;
 946         if (decl_modifiers & DM_DLLIMPORT) {
 947                 /* add prefix for imported symbols */
 948                 id = mangle(id_imp, id);
 949         }
 950         return id;
 951 }
 952
 953 /**
 954  * Mangles an entity linker (ld) name for Linux ELF usage.
 955  *
 956  * @param ent          the entity to be mangled
 957  * @param declaration  the declaration
 958  */
 959 static ident *create_ld_ident_linux_elf(ir_entity *entity,
 960                                         declaration_t *declaration)
 961 {
 962         (void) declaration;
 963         return get_entity_ident(entity);
 964 }
 965
 966 /**
 967  * Mangles an entity linker (ld) name for Mach-O usage.
 968  *
 969  * @param ent          the entity to be mangled
 970  * @param declaration  the declaration
 971  */
 972 static ident *create_ld_ident_macho(ir_entity *ent, declaration_t *declaration)
 973 {
 974         (void) declaration;
 975         ident *id = mangle(id_underscore, get_entity_ident(ent));
 976         return id;
 977 }
 978
 979 typedef ident* (*create_ld_ident_func)(ir_entity *entity,
 980                                        declaration_t *declaration);
 981 create_ld_ident_func  create_ld_ident = create_ld_ident_linux_elf;
 982
 983 /**
 984  * Creates an entity representing a function.
 985  *
 986  * @param declaration  the function declaration
 987  */
 988 static ir_entity *get_function_entity(declaration_t *declaration)
 989 {
 990         if (declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
 991                 return declaration->v.entity;
 992         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
 993
 994         symbol_t *symbol = declaration->symbol;
 995         ident    *id     = new_id_from_str(symbol->string);
 996
 997         ir_type  *global_type    = get_glob_type();
 998         ir_type  *ir_type_method = get_ir_type(declaration->type);
 999         assert(is_Method_type(ir_type_method));
1000
1001         /* already an entity defined? */
1002         ir_entity *entity = entitymap_get(&entitymap, symbol);
1003         if (entity != NULL) {
1004                 if (get_entity_visibility(entity) == visibility_external_allocated
1005                                 && declaration->init.statement != NULL) {
1006                         set_entity_visibility(entity, visibility_external_visible);
1007                 }
1008                 goto entity_created;
1009         }
1010
1011         dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
1012         entity               = new_d_entity(global_type, id, ir_type_method, dbgi);
1013         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
1014
1015         if (declaration->modifiers & DM_USED) {
1016                 set_entity_stickyness(entity, stickyness_sticky);
1017         }
1018
1019         /* static inline             => local
1020          * extern inline             => local
1021          * inline without definition => local
1022          * inline with definition    => external_visible */
1023         storage_class_tag_t const storage_class = declaration->storage_class;
1024         bool                const is_inline     = declaration->is_inline;
1025         bool                const has_body      = declaration->init.statement != NULL;
1026         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1027                 set_entity_visibility(entity, visibility_external_visible);
1028         } else if (storage_class == STORAGE_CLASS_STATIC ||
1029                    (is_inline && has_body)) {
1030                 if (!has_body) {
1031                         /* this entity was declared, but is defined nowhere */
1032                         set_entity_peculiarity(entity, peculiarity_description);
1033                 }
1034                 set_entity_visibility(entity, visibility_local);
1035         } else if (has_body) {
1036                 set_entity_visibility(entity, visibility_external_visible);
1037         } else {
1038                 set_entity_visibility(entity, visibility_external_allocated);
1039         }
1040         set_entity_allocation(entity, allocation_static);
1041
1042         /* We should check for file scope here, but as long as we compile C only
1043            this is not needed. */
1044         if (! firm_opt.freestanding) {
1045                 /* check for a known runtime function */
1046                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1047                         if (id != rts_idents[i])
1048                                 continue;
1049
1050                         /* ignore those rts functions not necessary needed for current mode */
1051                         if ((c_mode & rts_data[i].flags) == 0)
1052                                 continue;
1053                         assert(rts_entities[rts_data[i].id] == NULL);
1054                         rts_entities[rts_data[i].id] = entity;
1055                 }
1056         }
1057
1058         entitymap_insert(&entitymap, symbol, entity);
1059
1060 entity_created:
1061         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1062         declaration->v.entity         = entity;
1063
1064         return entity;
1065 }
1066
1067 /**
1068  * Creates a Const node representing a constant.
1069  */
1070 static ir_node *const_to_firm(const const_expression_t *cnst)
1071 {
1072         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1073         ir_mode  *mode = get_ir_mode(cnst->base.type);
1074
1075         char    buf[128];
1076         tarval *tv;
1077         size_t  len;
1078         if (mode_is_float(mode)) {
1079                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1080         } else {
1081                 if (mode_is_signed(mode)) {
1082                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1083                 } else {
1084                         len = snprintf(buf, sizeof(buf), "%llu",
1085                                        (unsigned long long) cnst->v.int_value);
1086                 }
1087                 tv = new_tarval_from_str(buf, len, mode);
1088         }
1089
1090         return new_d_Const(dbgi, mode, tv);
1091 }
1092
1093 /**
1094  * Creates a Const node representing a character constant.
1095  */
1096 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1097 {
1098         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1099         ir_mode  *mode = get_ir_mode(cnst->base.type);
1100
1101         long long int v = 0;
1102         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1103                 if (char_is_signed) {
1104                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1105                 } else {
1106                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1107                 }
1108         }
1109         char    buf[128];
1110         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1111         tarval *tv = new_tarval_from_str(buf, len, mode);
1112
1113         return new_d_Const(dbgi, mode, tv);
1114 }
1115
1116 /**
1117  * Creates a Const node representing a wide character constant.
1118  */
1119 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1120 {
1121         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1122         ir_mode  *mode = get_ir_mode(cnst->base.type);
1123
1124         long long int v = cnst->v.wide_character.begin[0];
1125
1126         char    buf[128];
1127         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1128         tarval *tv = new_tarval_from_str(buf, len, mode);
1129
1130         return new_d_Const(dbgi, mode, tv);
1131 }
1132
1133 /**
1134  * Creates a SymConst for a given entity.
1135  *
1136  * @param dbgi    debug info
1137  * @param mode    the (reference) mode for the SymConst
1138  * @param entity  the entity
1139  */
1140 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1141                               ir_entity *entity)
1142 {
1143         assert(entity != NULL);
1144         union symconst_symbol sym;
1145         sym.entity_p = entity;
1146         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1147 }
1148
1149 /**
1150  * Creates a SymConst node representing a string constant.
1151  *
1152  * @param src_pos    the source position of the string constant
1153  * @param id_prefix  a prefix for the name of the generated string constant
1154  * @param value      the value of the string constant
1155  */
1156 static ir_node *string_to_firm(const source_position_t *const src_pos,
1157                                const char *const id_prefix,
1158                                const string_t *const value)
1159 {
1160         ir_type  *const global_type = get_glob_type();
1161         dbg_info *const dbgi        = get_dbg_info(src_pos);
1162         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1163                                                        ir_type_const_char, dbgi);
1164
1165         ident     *const id     = id_unique(id_prefix);
1166         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1167         set_entity_ld_ident(entity, id);
1168         set_entity_variability(entity, variability_constant);
1169         set_entity_allocation(entity, allocation_static);
1170
1171         ir_type *const elem_type = ir_type_const_char;
1172         ir_mode *const mode      = get_type_mode(elem_type);
1173
1174         const char* const string = value->begin;
1175         const size_t      slen   = value->size;
1176
1177         set_array_lower_bound_int(type, 0, 0);
1178         set_array_upper_bound_int(type, 0, slen);
1179         set_type_size_bytes(type, slen);
1180         set_type_state(type, layout_fixed);
1181
1182         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1183         for(size_t i = 0; i < slen; ++i) {
1184                 tvs[i] = new_tarval_from_long(string[i], mode);
1185         }
1186
1187         set_array_entity_values(entity, tvs, slen);
1188         free(tvs);
1189
1190         return create_symconst(dbgi, mode_P_data, entity);
1191 }
1192
1193 /**
1194  * Creates a SymConst node representing a string literal.
1195  *
1196  * @param literal   the string literal
1197  */
1198 static ir_node *string_literal_to_firm(
1199                 const string_literal_expression_t* literal)
1200 {
1201         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1202                               &literal->value);
1203 }
1204
1205 /**
1206  * Creates a SymConst node representing a wide string literal.
1207  *
1208  * @param literal   the wide string literal
1209  */
1210 static ir_node *wide_string_literal_to_firm(
1211         const wide_string_literal_expression_t* const literal)
1212 {
1213         ir_type *const global_type = get_glob_type();
1214         ir_type *const elem_type   = ir_type_wchar_t;
1215         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1216         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1217                                                     elem_type, dbgi);
1218
1219         ident     *const id     = id_unique("Lstr.%u");
1220         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1221         set_entity_ld_ident(entity, id);
1222         set_entity_variability(entity, variability_constant);
1223         set_entity_allocation(entity, allocation_static);
1224
1225         ir_mode *const mode      = get_type_mode(elem_type);
1226
1227         const wchar_rep_t *const string = literal->value.begin;
1228         const size_t             slen   = literal->value.size;
1229
1230         set_array_lower_bound_int(type, 0, 0);
1231         set_array_upper_bound_int(type, 0, slen);
1232         set_type_size_bytes(type, slen);
1233         set_type_state(type, layout_fixed);
1234
1235         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1236         for(size_t i = 0; i < slen; ++i) {
1237                 tvs[i] = new_tarval_from_long(string[i], mode);
1238         }
1239
1240         set_array_entity_values(entity, tvs, slen);
1241         free(tvs);
1242
1243         return create_symconst(dbgi, mode_P_data, entity);
1244 }
1245
1246 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1247                                       ir_node *const addr)
1248 {
1249         ir_type *irtype = get_ir_type(type);
1250         if (is_compound_type(irtype)
1251                         || is_Method_type(irtype)
1252                         || is_Array_type(irtype)) {
1253                 return addr;
1254         }
1255
1256         ir_mode *const mode     = get_type_mode(irtype);
1257         ir_node *const memory   = get_store();
1258         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1259         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1260         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1261
1262         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1263                 set_Load_volatility(load, volatility_is_volatile);
1264         }
1265
1266         set_store(load_mem);
1267         return load_res;
1268 }
1269
1270 /**
1271  * Creates a strict Conv if neccessary.
1272  */
1273 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1274 {
1275         ir_mode *mode = get_irn_mode(node);
1276
1277         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1278                 return node;
1279         if (!mode_is_float(mode))
1280                 return node;
1281
1282         /* check if there is already a Conv */
1283         if (is_Conv(node)) {
1284                 /* convert it into a strict Conv */
1285                 set_Conv_strict(node, 1);
1286                 return node;
1287         }
1288
1289         /* otherwise create a new one */
1290         return new_d_strictConv(dbgi, node, mode);
1291 }
1292
1293 static ir_node *get_global_var_address(dbg_info *const dbgi,
1294                                        const declaration_t *const decl)
1295 {
1296         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1297
1298         ir_entity *const entity = decl->v.entity;
1299         switch ((storage_class_tag_t)decl->storage_class) {
1300                 case STORAGE_CLASS_THREAD:
1301                 case STORAGE_CLASS_THREAD_EXTERN:
1302                 case STORAGE_CLASS_THREAD_STATIC: {
1303                         ir_node *const no_mem = new_NoMem();
1304                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1305                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1306                 }
1307
1308                 default:
1309                         return create_symconst(dbgi, mode_P_data, entity);
1310         }
1311 }
1312
1313 /**
1314  * Returns the correct base address depending on whether it is a parameter or a
1315  * normal local variable.
1316  */
1317 static ir_node *get_local_frame(ir_entity *const ent)
1318 {
1319         ir_graph      *const irg   = current_ir_graph;
1320         const ir_type *const owner = get_entity_owner(ent);
1321         if (owner == get_irg_frame_type(irg)) {
1322                 return get_irg_frame(irg);
1323         } else {
1324                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1325                 return get_irg_value_param_base(irg);
1326         }
1327 }
1328
1329 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1330 {
1331         ir_mode *value_mode = get_irn_mode(value);
1332
1333         if (value_mode == dest_mode || is_Bad(value))
1334                 return value;
1335
1336         if (dest_mode == mode_b) {
1337                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1338                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1339                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1340                 return proj;
1341         }
1342
1343         return new_d_Conv(dbgi, value, dest_mode);
1344 }
1345
1346 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1347 {
1348         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1349         declaration_t *declaration = ref->declaration;
1350         type_t        *type        = skip_typeref(declaration->type);
1351
1352         /* make sure the type is constructed */
1353         (void) get_ir_type(type);
1354
1355         switch((declaration_kind_t) declaration->declaration_kind) {
1356         case DECLARATION_KIND_TYPE:
1357         case DECLARATION_KIND_UNKNOWN:
1358                 break;
1359
1360         case DECLARATION_KIND_ENUM_ENTRY: {
1361                 ir_mode *const mode = get_ir_mode(type);
1362                 return new_Const(mode, declaration->v.enum_val);
1363         }
1364
1365         case DECLARATION_KIND_LOCAL_VARIABLE: {
1366                 ir_mode *const mode = get_ir_mode(type);
1367                 return get_value(declaration->v.value_number, mode);
1368         }
1369         case DECLARATION_KIND_FUNCTION: {
1370                 ir_mode *const mode = get_ir_mode(type);
1371                 return create_symconst(dbgi, mode, declaration->v.entity);
1372         }
1373         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1374                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1375                 return deref_address(dbgi, declaration->type, addr);
1376         }
1377
1378         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1379                 ir_entity *entity = declaration->v.entity;
1380                 ir_node   *frame  = get_local_frame(entity);
1381                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1382                 return deref_address(dbgi, declaration->type, sel);
1383         }
1384
1385         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1386                 return declaration->v.vla_base;
1387
1388         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1389         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1390         case DECLARATION_KIND_COMPOUND_MEMBER:
1391         case DECLARATION_KIND_LABEL_BLOCK:
1392                 panic("not implemented reference type");
1393         }
1394
1395         panic("reference to declaration with unknown type found");
1396 }
1397
1398 static ir_node *reference_addr(const reference_expression_t *ref)
1399 {
1400         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1401         declaration_t *declaration = ref->declaration;
1402
1403         switch((declaration_kind_t) declaration->declaration_kind) {
1404         case DECLARATION_KIND_TYPE:
1405         case DECLARATION_KIND_UNKNOWN:
1406                 break;
1407         case DECLARATION_KIND_LOCAL_VARIABLE:
1408                 /* you can store to a local variable (so we don't panic but return NULL
1409                  * as an indicator for no real address) */
1410                 return NULL;
1411         case DECLARATION_KIND_FUNCTION: {
1412                 type_t *const  type = skip_typeref(ref->base.type);
1413                 ir_mode *const mode = get_ir_mode(type);
1414                 return create_symconst(dbgi, mode, declaration->v.entity);
1415         }
1416         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1417                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1418                 return addr;
1419         }
1420         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1421                 ir_entity *entity = declaration->v.entity;
1422                 ir_node   *frame  = get_local_frame(entity);
1423                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1424
1425                 return sel;
1426         }
1427
1428         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1429                 return declaration->v.vla_base;
1430
1431         case DECLARATION_KIND_ENUM_ENTRY:
1432                 panic("trying to reference enum entry");
1433
1434         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1435         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1436         case DECLARATION_KIND_COMPOUND_MEMBER:
1437         case DECLARATION_KIND_LABEL_BLOCK:
1438                 panic("not implemented reference type");
1439         }
1440
1441         panic("reference to declaration with unknown type found");
1442 }
1443
1444 /**
1445  * Transform calls to builtin functions.
1446  */
1447 static ir_node *process_builtin_call(const call_expression_t *call)
1448 {
1449         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1450
1451         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1452         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1453
1454         type_t *type = skip_typeref(builtin->base.type);
1455         assert(is_type_pointer(type));
1456
1457         type_t   *function_type = skip_typeref(type->pointer.points_to);
1458         symbol_t *symbol        = builtin->symbol;
1459
1460         switch(symbol->ID) {
1461         case T___builtin_alloca: {
1462                 if (call->arguments == NULL || call->arguments->next != NULL) {
1463                         panic("invalid number of parameters on __builtin_alloca");
1464                 }
1465                 expression_t *argument = call->arguments->expression;
1466                 ir_node      *size     = expression_to_firm(argument);
1467
1468                 ir_node *store  = get_store();
1469                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1470                                               stack_alloc);
1471                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1472                 set_store(proj_m);
1473                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1474
1475                 return res;
1476         }
1477         case T___builtin_huge_val: {
1478                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1479                 tarval  *tv   = get_mode_infinite(mode);
1480                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1481                 return   res;
1482         }
1483         case T___builtin_nan:
1484         case T___builtin_nanf:
1485         case T___builtin_nand: {
1486                 /* Ignore string for now... */
1487                 assert(is_type_function(function_type));
1488                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1489                 tarval  *tv   = get_mode_NAN(mode);
1490                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1491                 return res;
1492         }
1493         case T___builtin_va_end:
1494                 return NULL;
1495         default:
1496                 panic("Unsupported builtin found\n");
1497         }
1498 }
1499
1500 /**
1501  * Transform a call expression.
1502  * Handles some special cases, like alloca() calls, which must be resolved
1503  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1504  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1505  * handled right...
1506  */
1507 static ir_node *call_expression_to_firm(const call_expression_t *call)
1508 {
1509         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1510         assert(get_cur_block() != NULL);
1511
1512         expression_t *function = call->function;
1513         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1514                 return process_builtin_call(call);
1515         }
1516         if (function->kind == EXPR_REFERENCE) {
1517                 const reference_expression_t *ref = &function->reference;
1518                 declaration_t *declaration = ref->declaration;
1519
1520                 if ((declaration_kind_t)declaration->declaration_kind == DECLARATION_KIND_FUNCTION) {
1521                         if (declaration->v.entity == rts_entities[rts_alloca]) {
1522                                 /* handle alloca() call */
1523                                 expression_t *argument = call->arguments->expression;
1524                                 ir_node      *size     = expression_to_firm(argument);
1525
1526                                 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1527
1528                                 ir_node *store  = get_store();
1529                                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1530                                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1531                                               stack_alloc);
1532                                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1533                                 set_store(proj_m);
1534                                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1535
1536                                 return res;
1537                         }
1538                 }
1539         }
1540         ir_node *callee = expression_to_firm(function);
1541
1542         type_t *type = skip_typeref(function->base.type);
1543         assert(is_type_pointer(type));
1544         pointer_type_t *pointer_type = &type->pointer;
1545         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1546         assert(is_type_function(points_to));
1547         function_type_t *function_type = &points_to->function;
1548
1549         int      n_parameters = 0;
1550         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1551         ir_type *new_method_type = NULL;
1552         if (function_type->variadic || function_type->unspecified_parameters) {
1553                 const call_argument_t *argument = call->arguments;
1554                 for( ; argument != NULL; argument = argument->next) {
1555                         ++n_parameters;
1556                 }
1557
1558                 /* we need to construct a new method type matching the call
1559                  * arguments... */
1560                 int n_res       = get_method_n_ress(ir_method_type);
1561                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1562                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1563                                                     n_parameters, n_res, dbgi);
1564                 set_method_calling_convention(new_method_type,
1565                                get_method_calling_convention(ir_method_type));
1566                 set_method_additional_properties(new_method_type,
1567                                get_method_additional_properties(ir_method_type));
1568                 set_method_variadicity(new_method_type,
1569                                        get_method_variadicity(ir_method_type));
1570
1571                 for(int i = 0; i < n_res; ++i) {
1572                         set_method_res_type(new_method_type, i,
1573                                             get_method_res_type(ir_method_type, i));
1574                 }
1575                 argument = call->arguments;
1576                 for(int i = 0; i < n_parameters; ++i, argument = argument->next) {
1577                         expression_t *expression = argument->expression;
1578                         ir_type      *irtype     = get_ir_type(expression->base.type);
1579                         set_method_param_type(new_method_type, i, irtype);
1580                 }
1581                 ir_method_type = new_method_type;
1582         } else {
1583                 n_parameters = get_method_n_params(ir_method_type);
1584         }
1585
1586         ir_node *in[n_parameters];
1587
1588         const call_argument_t *argument = call->arguments;
1589         for(int n = 0; n < n_parameters; ++n) {
1590                 expression_t *expression = argument->expression;
1591                 ir_node      *arg_node   = expression_to_firm(expression);
1592
1593                 arg_node = do_strict_conv(dbgi, arg_node);
1594
1595                 in[n] = arg_node;
1596
1597                 argument = argument->next;
1598         }
1599
1600         ir_node  *store = get_store();
1601         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1602                                      ir_method_type);
1603         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1604         set_store(mem);
1605
1606         type_t  *return_type = skip_typeref(function_type->return_type);
1607         ir_node *result      = NULL;
1608
1609         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1610                 ir_mode *mode;
1611                 if (is_type_scalar(return_type)) {
1612                         mode = get_ir_mode(return_type);
1613                 } else {
1614                         mode = mode_P_data;
1615                 }
1616                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1617                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1618         }
1619
1620         return result;
1621 }
1622
1623 static void statement_to_firm(statement_t *statement);
1624 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1625
1626 static ir_node *expression_to_addr(const expression_t *expression);
1627 static void create_condition_evaluation(const expression_t *expression,
1628                                         ir_node *true_block,
1629                                         ir_node *false_block);
1630
1631 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1632                          ir_node *value)
1633 {
1634         value = do_strict_conv(dbgi, value);
1635
1636         ir_node *memory = get_store();
1637
1638         if (is_type_scalar(type)) {
1639                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1640                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1641                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1642                         set_Store_volatility(store, volatility_is_volatile);
1643                 set_store(store_mem);
1644         } else {
1645                 ir_type *irtype    = get_ir_type(type);
1646                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1647                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1648                 set_store(copyb_mem);
1649         }
1650 }
1651
1652 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1653 {
1654         tarval *all_one   = get_mode_all_one(mode);
1655         int     mode_size = get_mode_size_bits(mode);
1656
1657         assert(offset >= 0 && size >= 0);
1658         assert(offset + size <= mode_size);
1659         if (size == mode_size) {
1660                 return all_one;
1661         }
1662
1663         long    shiftr    = get_mode_size_bits(mode) - size;
1664         long    shiftl    = offset;
1665         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1666         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1667         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1668         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1669
1670         return mask1;
1671 }
1672
1673 static void bitfield_store_to_firm(const select_expression_t *expression,
1674                                    ir_node *addr, ir_node *value)
1675 {
1676         type_t       *type   = expression->base.type;
1677         ir_mode      *mode   = get_ir_mode(type);
1678
1679         assert(get_irn_mode(value) == mode || is_Bad(value));
1680
1681         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1682
1683         /* kill upper bits of value and shift to right position */
1684         ir_entity *entity       = expression->compound_entry->v.entity;
1685         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1686         ir_type   *entity_type  = get_entity_type(entity);
1687         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1688
1689         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1690         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1691         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1692         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1693         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1694         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1695
1696         /* load current value */
1697         ir_node  *mem             = get_store();
1698         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1699         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1700         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1701         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1702         tarval   *inv_mask        = tarval_not(shift_mask);
1703         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1704         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1705
1706         /* construct new value and store */
1707         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1708         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1709         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1710         set_store(store_mem);
1711
1712         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1713                 set_Load_volatility(load, volatility_is_volatile);
1714                 set_Store_volatility(store, volatility_is_volatile);
1715         }
1716 }
1717
1718 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1719                 ir_node *addr)
1720 {
1721         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1722         type_t   *type     = expression->base.type;
1723         ir_mode  *mode     = get_ir_mode(type);
1724         ir_node  *mem      = get_store();
1725         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1726         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1727         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1728
1729         load_res           = create_conv(dbgi, load_res, mode_int);
1730
1731         set_store(load_mem);
1732
1733         /* kill upper bits */
1734         ir_entity *entity       = expression->compound_entry->v.entity;
1735         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1736         ir_type   *entity_type  = get_entity_type(entity);
1737         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1738         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1739         assert(shift_bitsl >= 0);
1740         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1741         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1742         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1743
1744         long       shift_bitsr  = bitoffset + shift_bitsl;
1745         assert(shift_bitsr <= (long) machine_size);
1746         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1747         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1748         ir_node   *shiftr;
1749         if (mode_is_signed(mode)) {
1750                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1751         } else {
1752                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1753         }
1754
1755         return create_conv(dbgi, shiftr, mode);
1756 }
1757
1758 static void set_value_for_expression_addr(const expression_t *expression,
1759                                           ir_node *value, ir_node *addr)
1760 {
1761         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1762         value          = do_strict_conv(dbgi, value);
1763
1764         if (expression->kind == EXPR_REFERENCE) {
1765                 const reference_expression_t *ref = &expression->reference;
1766
1767                 declaration_t *declaration = ref->declaration;
1768                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1769                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1770                         set_value(declaration->v.value_number, value);
1771                         return;
1772                 }
1773         }
1774
1775         if (addr == NULL)
1776                 addr = expression_to_addr(expression);
1777
1778         type_t *type = skip_typeref(expression->base.type);
1779
1780         if (expression->kind == EXPR_SELECT) {
1781                 const select_expression_t *select = &expression->select;
1782
1783                 declaration_t *declaration = select->compound_entry;
1784                 if (declaration->type->kind == TYPE_BITFIELD) {
1785                         bitfield_store_to_firm(select, addr, value);
1786                         return;
1787                 }
1788         }
1789
1790         assign_value(dbgi, addr, type, value);
1791 }
1792
1793 static void set_value_for_expression(const expression_t *expression,
1794                                      ir_node *value)
1795 {
1796         set_value_for_expression_addr(expression, value, NULL);
1797 }
1798
1799 static ir_node *get_value_from_lvalue(const expression_t *expression,
1800                                       ir_node *addr)
1801 {
1802         if (expression->kind == EXPR_REFERENCE) {
1803                 const reference_expression_t *ref = &expression->reference;
1804
1805                 declaration_t *declaration = ref->declaration;
1806                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1807                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1808                         assert(addr == NULL);
1809                         ir_mode *mode = get_ir_mode(expression->base.type);
1810                         return get_value(declaration->v.value_number, mode);
1811                 }
1812         }
1813
1814         assert(addr != NULL);
1815         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1816
1817         ir_node *value;
1818         if (expression->kind == EXPR_SELECT &&
1819             expression->select.compound_entry->type->kind == TYPE_BITFIELD){
1820                 value = bitfield_extract_to_firm(&expression->select, addr);
1821         } else {
1822                 value = deref_address(dbgi, expression->base.type, addr);
1823         }
1824
1825         return value;
1826 }
1827
1828
1829 static ir_node *create_incdec(const unary_expression_t *expression)
1830 {
1831         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1832         const expression_t *value_expr = expression->value;
1833         ir_node            *addr       = expression_to_addr(value_expr);
1834         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1835
1836         type_t  *type = skip_typeref(expression->base.type);
1837         ir_mode *mode = get_ir_mode(expression->base.type);
1838
1839         ir_node *offset;
1840         if (is_type_pointer(type)) {
1841                 pointer_type_t *pointer_type = &type->pointer;
1842                 offset                       = get_type_size(pointer_type->points_to);
1843         } else {
1844                 assert(is_type_arithmetic(type));
1845                 offset = new_Const(mode, get_mode_one(mode));
1846         }
1847
1848         ir_node *result;
1849         ir_node *store_value;
1850         switch(expression->base.kind) {
1851         case EXPR_UNARY_POSTFIX_INCREMENT:
1852                 result      = value;
1853                 store_value = new_d_Add(dbgi, value, offset, mode);
1854                 break;
1855         case EXPR_UNARY_POSTFIX_DECREMENT:
1856                 result      = value;
1857                 store_value = new_d_Sub(dbgi, value, offset, mode);
1858                 break;
1859         case EXPR_UNARY_PREFIX_INCREMENT:
1860                 result      = new_d_Add(dbgi, value, offset, mode);
1861                 store_value = result;
1862                 break;
1863         case EXPR_UNARY_PREFIX_DECREMENT:
1864                 result      = new_d_Sub(dbgi, value, offset, mode);
1865                 store_value = result;
1866                 break;
1867         default:
1868                 panic("no incdec expr in create_incdec");
1869         }
1870
1871         set_value_for_expression_addr(value_expr, store_value, addr);
1872
1873         return result;
1874 }
1875
1876 static bool is_local_variable(expression_t *expression)
1877 {
1878         if (expression->kind != EXPR_REFERENCE)
1879                 return false;
1880         reference_expression_t *ref_expr    = &expression->reference;
1881         declaration_t          *declaration = ref_expr->declaration;
1882         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1883 }
1884
1885 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1886 {
1887         switch(kind) {
1888         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1889         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1890         case EXPR_BINARY_NOTEQUAL:
1891                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1892         case EXPR_BINARY_ISLESS:
1893         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1894         case EXPR_BINARY_ISLESSEQUAL:
1895         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1896         case EXPR_BINARY_ISGREATER:
1897         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1898         case EXPR_BINARY_ISGREATEREQUAL:
1899         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1900         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1901
1902         default:
1903                 break;
1904         }
1905         panic("trying to get pn_Cmp from non-comparison binexpr type");
1906 }
1907
1908 /**
1909  * Handle the assume optimizer hint: check if a Confirm
1910  * node can be created.
1911  *
1912  * @param dbi    debug info
1913  * @param expr   the IL assume expression
1914  *
1915  * we support here only some simple cases:
1916  *  - var rel const
1917  *  - const rel val
1918  *  - var rel var
1919  */
1920 static ir_node *handle_assume_compare(dbg_info *dbi,
1921                                       const binary_expression_t *expression)
1922 {
1923         expression_t  *op1 = expression->left;
1924         expression_t  *op2 = expression->right;
1925         declaration_t *var2, *var = NULL;
1926         ir_node       *res = NULL;
1927         pn_Cmp         cmp_val;
1928
1929         cmp_val = get_pnc(expression->base.kind, op1->base.type);
1930
1931         if (is_local_variable(op1) && is_local_variable(op2)) {
1932         var  = op1->reference.declaration;
1933             var2 = op2->reference.declaration;
1934
1935                 type_t  *const type = skip_typeref(var->type);
1936                 ir_mode *const mode = get_ir_mode(type);
1937
1938                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1939                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1940
1941                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1942                 set_value(var2->v.value_number, res);
1943
1944                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1945                 set_value(var->v.value_number, res);
1946
1947                 return res;
1948         }
1949
1950         expression_t *con;
1951         if (is_local_variable(op1) && is_constant_expression(op2)) {
1952                 var = op1->reference.declaration;
1953                 con = op2;
1954         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
1955                 cmp_val = get_inversed_pnc(cmp_val);
1956                 var = op2->reference.declaration;
1957                 con = op1;
1958         }
1959
1960         if (var != NULL) {
1961                 type_t  *const type = skip_typeref(var->type);
1962                 ir_mode *const mode = get_ir_mode(type);
1963
1964                 res = get_value(var->v.value_number, mode);
1965                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
1966                 set_value(var->v.value_number, res);
1967         }
1968         return res;
1969 }
1970
1971 /**
1972  * Handle the assume optimizer hint.
1973  *
1974  * @param dbi    debug info
1975  * @param expr   the IL assume expression
1976  */
1977 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
1978         switch(expression->kind) {
1979         case EXPR_BINARY_EQUAL:
1980         case EXPR_BINARY_NOTEQUAL:
1981         case EXPR_BINARY_LESS:
1982         case EXPR_BINARY_LESSEQUAL:
1983         case EXPR_BINARY_GREATER:
1984         case EXPR_BINARY_GREATEREQUAL:
1985                 return handle_assume_compare(dbi, &expression->binary);
1986         default:
1987                 return NULL;
1988         }
1989 }
1990
1991 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1992 {
1993         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1994         type_t   *type = skip_typeref(expression->base.type);
1995
1996         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
1997                 return expression_to_addr(expression->value);
1998
1999         const expression_t *value = expression->value;
2000
2001         switch(expression->base.kind) {
2002         case EXPR_UNARY_NEGATE: {
2003                 ir_node *value_node = expression_to_firm(value);
2004                 ir_mode *mode = get_ir_mode(type);
2005                 return new_d_Minus(dbgi, value_node, mode);
2006         }
2007         case EXPR_UNARY_PLUS:
2008                 return expression_to_firm(value);
2009         case EXPR_UNARY_BITWISE_NEGATE: {
2010                 ir_node *value_node = expression_to_firm(value);
2011                 ir_mode *mode = get_ir_mode(type);
2012                 return new_d_Not(dbgi, value_node, mode);
2013         }
2014         case EXPR_UNARY_NOT: {
2015                 ir_node *value_node = _expression_to_firm(value);
2016                 value_node          = create_conv(dbgi, value_node, mode_b);
2017                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2018                 return res;
2019         }
2020         case EXPR_UNARY_DEREFERENCE: {
2021                 ir_node *value_node = expression_to_firm(value);
2022                 type_t  *value_type = skip_typeref(value->base.type);
2023                 assert(is_type_pointer(value_type));
2024                 type_t  *points_to  = value_type->pointer.points_to;
2025                 return deref_address(dbgi, points_to, value_node);
2026         }
2027         case EXPR_UNARY_POSTFIX_INCREMENT:
2028         case EXPR_UNARY_POSTFIX_DECREMENT:
2029         case EXPR_UNARY_PREFIX_INCREMENT:
2030         case EXPR_UNARY_PREFIX_DECREMENT:
2031                 return create_incdec(expression);
2032         case EXPR_UNARY_CAST: {
2033                 ir_node *value_node = expression_to_firm(value);
2034                 if (is_type_scalar(type)) {
2035                         ir_mode *mode = get_ir_mode(type);
2036                         ir_node *node = create_conv(dbgi, value_node, mode);
2037                         node = do_strict_conv(dbgi, node);
2038                         return node;
2039                 } else {
2040                         /* make sure firm type is constructed */
2041                         (void) get_ir_type(type);
2042                         return value_node;
2043                 }
2044         }
2045         case EXPR_UNARY_CAST_IMPLICIT: {
2046                 ir_node *value_node = expression_to_firm(value);
2047                 if (is_type_scalar(type)) {
2048                         ir_mode *mode = get_ir_mode(type);
2049                         return create_conv(dbgi, value_node, mode);
2050                 } else {
2051                         return value_node;
2052                 }
2053         }
2054         case EXPR_UNARY_ASSUME:
2055                 if (firm_opt.confirm)
2056                         return handle_assume(dbgi, value);
2057                 else
2058                         return NULL;
2059
2060         default:
2061                 break;
2062         }
2063         panic("invalid UNEXPR type found");
2064 }
2065
2066 /**
2067  * produces a 0/1 depending of the value of a mode_b node
2068  */
2069 static ir_node *produce_condition_result(const expression_t *expression,
2070                                          dbg_info *dbgi)
2071 {
2072         ir_mode *mode      = get_ir_mode(expression->base.type);
2073         ir_node *cur_block = get_cur_block();
2074
2075         ir_node *one_block = new_immBlock();
2076         ir_node *one       = new_Const(mode, get_mode_one(mode));
2077         ir_node *jmp_one   = new_d_Jmp(dbgi);
2078
2079         ir_node *zero_block = new_immBlock();
2080         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2081         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2082
2083         set_cur_block(cur_block);
2084         create_condition_evaluation(expression, one_block, zero_block);
2085         mature_immBlock(one_block);
2086         mature_immBlock(zero_block);
2087
2088         ir_node *common_block = new_immBlock();
2089         add_immBlock_pred(common_block, jmp_one);
2090         add_immBlock_pred(common_block, jmp_zero);
2091         mature_immBlock(common_block);
2092
2093         ir_node *in[2] = { one, zero };
2094         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2095
2096         return val;
2097 }
2098
2099 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2100                 ir_node *value, type_t *type)
2101 {
2102         pointer_type_t *const pointer_type = &type->pointer;
2103         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2104         unsigned              elem_size    = get_type_size_const(points_to);
2105
2106         /* gcc extension */
2107         if (elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) {
2108                 elem_size = 1;
2109         }
2110
2111         assert(elem_size >= 1);
2112         if (elem_size == 1)
2113                 return value;
2114
2115         value = create_conv(dbgi, value, mode_int);
2116         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2117         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2118         return mul;
2119 }
2120
2121 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2122                           ir_node *left, ir_node *right)
2123 {
2124         ir_mode  *mode;
2125         type_t   *type_left  = skip_typeref(expression->left->base.type);
2126         type_t   *type_right = skip_typeref(expression->right->base.type);
2127
2128         expression_kind_t kind = expression->base.kind;
2129
2130         switch (kind) {
2131         case EXPR_BINARY_SHIFTLEFT:
2132         case EXPR_BINARY_SHIFTRIGHT:
2133         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2134         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2135                 mode  = get_irn_mode(left);
2136                 right = create_conv(dbgi, right, mode_uint);
2137                 break;
2138
2139         case EXPR_BINARY_SUB:
2140                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2141                         const pointer_type_t *const ptr_type = &type_left->pointer;
2142
2143                         mode = get_ir_mode(expression->base.type);
2144                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2145                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2146                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2147                         ir_node *const no_mem    = new_NoMem();
2148                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2149                                                                                                    mode, op_pin_state_floats);
2150                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2151                 }
2152                 /* fallthrough */
2153         case EXPR_BINARY_SUB_ASSIGN:
2154                 if (is_type_pointer(type_left)) {
2155                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2156                         mode  = get_ir_mode(type_left);
2157                         break;
2158                 }
2159                 goto normal_node;
2160
2161         case EXPR_BINARY_ADD:
2162         case EXPR_BINARY_ADD_ASSIGN:
2163                 if (is_type_pointer(type_left)) {
2164                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2165                         mode  = get_ir_mode(type_left);
2166                         break;
2167                 } else if (is_type_pointer(type_right)) {
2168                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2169                         mode  = get_ir_mode(type_right);
2170                         break;
2171                 }
2172                 goto normal_node;
2173
2174         default:
2175 normal_node:
2176                 mode = get_irn_mode(right);
2177                 left = create_conv(dbgi, left, mode);
2178                 break;
2179         }
2180
2181         switch (kind) {
2182         case EXPR_BINARY_ADD_ASSIGN:
2183         case EXPR_BINARY_ADD:
2184                 return new_d_Add(dbgi, left, right, mode);
2185         case EXPR_BINARY_SUB_ASSIGN:
2186         case EXPR_BINARY_SUB:
2187                 return new_d_Sub(dbgi, left, right, mode);
2188         case EXPR_BINARY_MUL_ASSIGN:
2189         case EXPR_BINARY_MUL:
2190                 return new_d_Mul(dbgi, left, right, mode);
2191         case EXPR_BINARY_BITWISE_AND:
2192         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2193                 return new_d_And(dbgi, left, right, mode);
2194         case EXPR_BINARY_BITWISE_OR:
2195         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2196                 return new_d_Or(dbgi, left, right, mode);
2197         case EXPR_BINARY_BITWISE_XOR:
2198         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2199                 return new_d_Eor(dbgi, left, right, mode);
2200         case EXPR_BINARY_SHIFTLEFT:
2201         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2202                 return new_d_Shl(dbgi, left, right, mode);
2203         case EXPR_BINARY_SHIFTRIGHT:
2204         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2205                 if (mode_is_signed(mode)) {
2206                         return new_d_Shrs(dbgi, left, right, mode);
2207                 } else {
2208                         return new_d_Shr(dbgi, left, right, mode);
2209                 }
2210         case EXPR_BINARY_DIV:
2211         case EXPR_BINARY_DIV_ASSIGN: {
2212                 ir_node *pin = new_Pin(new_NoMem());
2213                 ir_node *op;
2214                 ir_node *res;
2215                 if (mode_is_float(mode)) {
2216                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2217                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2218                 } else {
2219                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2220                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2221                 }
2222                 return res;
2223         }
2224         case EXPR_BINARY_MOD:
2225         case EXPR_BINARY_MOD_ASSIGN: {
2226                 ir_node *pin = new_Pin(new_NoMem());
2227                 assert(!mode_is_float(mode));
2228                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2229                                          op_pin_state_floats);
2230                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2231                 return res;
2232         }
2233         default:
2234                 panic("unexpected expression kind");
2235         }
2236 }
2237
2238 static ir_node *create_lazy_op(const binary_expression_t *expression)
2239 {
2240         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2241         type_t   *type = expression->base.type;
2242         ir_mode  *mode = get_ir_mode(type);
2243
2244         if (is_constant_expression(expression->left)) {
2245                 long val = fold_constant(expression->left);
2246                 expression_kind_t ekind = expression->base.kind;
2247                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
2248                                 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
2249                         return expression_to_firm(expression->right);
2250                 } else {
2251                         assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
2252                                         || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
2253                         return new_Const(mode, get_mode_one(mode));
2254                 }
2255         }
2256
2257         return produce_condition_result((const expression_t*) expression, dbgi);
2258 }
2259
2260 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2261                                             ir_node *right, ir_mode *mode);
2262
2263 static ir_node *create_assign_binop(const binary_expression_t *expression)
2264 {
2265         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2266         const expression_t *left_expr = expression->left;
2267         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2268         ir_node            *left_addr = expression_to_addr(left_expr);
2269         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2270         ir_node            *right     = expression_to_firm(expression->right);
2271         ir_node            *result    = create_op(dbgi, expression, left, right);
2272
2273         result = create_conv(dbgi, result, left_mode);
2274         result = do_strict_conv(dbgi, result);
2275
2276         set_value_for_expression_addr(left_expr, result, left_addr);
2277
2278         return result;
2279 }
2280
2281 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2282 {
2283         expression_kind_t kind = expression->base.kind;
2284
2285         switch(kind) {
2286         case EXPR_BINARY_EQUAL:
2287         case EXPR_BINARY_NOTEQUAL:
2288         case EXPR_BINARY_LESS:
2289         case EXPR_BINARY_LESSEQUAL:
2290         case EXPR_BINARY_GREATER:
2291         case EXPR_BINARY_GREATEREQUAL:
2292         case EXPR_BINARY_ISGREATER:
2293         case EXPR_BINARY_ISGREATEREQUAL:
2294         case EXPR_BINARY_ISLESS:
2295         case EXPR_BINARY_ISLESSEQUAL:
2296         case EXPR_BINARY_ISLESSGREATER:
2297         case EXPR_BINARY_ISUNORDERED: {
2298                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2299                 ir_node *left  = expression_to_firm(expression->left);
2300                 ir_node *right = expression_to_firm(expression->right);
2301                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2302                 long     pnc   = get_pnc(kind, expression->left->base.type);
2303                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2304                 return proj;
2305         }
2306         case EXPR_BINARY_ASSIGN: {
2307                 ir_node *addr  = expression_to_addr(expression->left);
2308                 ir_node *right = expression_to_firm(expression->right);
2309                 set_value_for_expression_addr(expression->left, right, addr);
2310
2311                 return right;
2312         }
2313         case EXPR_BINARY_ADD:
2314         case EXPR_BINARY_SUB:
2315         case EXPR_BINARY_MUL:
2316         case EXPR_BINARY_DIV:
2317         case EXPR_BINARY_MOD:
2318         case EXPR_BINARY_BITWISE_AND:
2319         case EXPR_BINARY_BITWISE_OR:
2320         case EXPR_BINARY_BITWISE_XOR:
2321         case EXPR_BINARY_SHIFTLEFT:
2322         case EXPR_BINARY_SHIFTRIGHT:
2323         {
2324                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2325                 ir_node  *left  = expression_to_firm(expression->left);
2326                 ir_node  *right = expression_to_firm(expression->right);
2327                 return create_op(dbgi, expression, left, right);
2328         }
2329         case EXPR_BINARY_LOGICAL_AND:
2330         case EXPR_BINARY_LOGICAL_OR:
2331                 return create_lazy_op(expression);
2332         case EXPR_BINARY_COMMA:
2333                 /* create side effects of left side */
2334                 (void) expression_to_firm(expression->left);
2335                 return _expression_to_firm(expression->right);
2336
2337         case EXPR_BINARY_ADD_ASSIGN:
2338         case EXPR_BINARY_SUB_ASSIGN:
2339         case EXPR_BINARY_MUL_ASSIGN:
2340         case EXPR_BINARY_MOD_ASSIGN:
2341         case EXPR_BINARY_DIV_ASSIGN:
2342         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2343         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2344         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2345         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2346         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2347                 return create_assign_binop(expression);
2348         case EXPR_BINARY_BUILTIN_EXPECT:
2349                 return _expression_to_firm(expression->left);
2350         default:
2351                 panic("TODO binexpr type");
2352         }
2353 }
2354
2355 static ir_node *array_access_addr(const array_access_expression_t *expression)
2356 {
2357         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2358         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2359         ir_node  *offset    = expression_to_firm(expression->index);
2360
2361         type_t  *offset_type = skip_typeref(expression->index->base.type);
2362         ir_mode *mode;
2363         if (is_type_signed(offset_type)) {
2364                 mode = get_ir_mode(type_ssize_t);
2365         } else {
2366                 mode = get_ir_mode(type_size_t);
2367         }
2368         offset = create_conv(dbgi, offset, mode);
2369
2370         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2371         assert(is_type_pointer(ref_type));
2372         pointer_type_t *pointer_type = &ref_type->pointer;
2373
2374         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2375         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2376         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2377                                              mode);
2378         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2379
2380         return result;
2381 }
2382
2383 static ir_node *array_access_to_firm(
2384                 const array_access_expression_t *expression)
2385 {
2386         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2387         ir_node  *addr   = array_access_addr(expression);
2388         type_t   *type   = revert_automatic_type_conversion(
2389                         (const expression_t*) expression);
2390         type             = skip_typeref(type);
2391
2392         return deref_address(dbgi, type, addr);
2393 }
2394
2395 static long get_offsetof_offset(const offsetof_expression_t *expression)
2396 {
2397         type_t *orig_type = expression->type;
2398         long    offset    = 0;
2399
2400         designator_t *designator = expression->designator;
2401         for( ; designator != NULL; designator = designator->next) {
2402                 type_t *type = skip_typeref(orig_type);
2403                 /* be sure the type is constructed */
2404                 (void) get_ir_type(type);
2405
2406                 if (designator->symbol != NULL) {
2407                         assert(is_type_compound(type));
2408                         symbol_t *symbol = designator->symbol;
2409
2410                         declaration_t *declaration = type->compound.declaration;
2411                         declaration_t *iter        = declaration->scope.declarations;
2412                         for( ; iter != NULL; iter = iter->next) {
2413                                 if (iter->symbol == symbol) {
2414                                         break;
2415                                 }
2416                         }
2417                         assert(iter != NULL);
2418
2419                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2420                         offset += get_entity_offset(iter->v.entity);
2421
2422                         orig_type = iter->type;
2423                 } else {
2424                         expression_t *array_index = designator->array_index;
2425                         assert(designator->array_index != NULL);
2426                         assert(is_type_array(type));
2427                         assert(is_type_valid(array_index->base.type));
2428
2429                         long index         = fold_constant(array_index);
2430                         ir_type *arr_type  = get_ir_type(type);
2431                         ir_type *elem_type = get_array_element_type(arr_type);
2432                         long     elem_size = get_type_size_bytes(elem_type);
2433
2434                         offset += index * elem_size;
2435
2436                         orig_type = type->array.element_type;
2437                 }
2438         }
2439
2440         return offset;
2441 }
2442
2443 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2444 {
2445         ir_mode  *mode   = get_ir_mode(expression->base.type);
2446         long      offset = get_offsetof_offset(expression);
2447         tarval   *tv     = new_tarval_from_long(offset, mode);
2448         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2449
2450         return new_d_Const(dbgi, mode, tv);
2451 }
2452
2453 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2454                                      ir_entity *entity, type_t *type);
2455
2456 static ir_node *compound_literal_to_firm(
2457                 const compound_literal_expression_t *expression)
2458 {
2459         type_t *type = expression->type;
2460
2461         /* create an entity on the stack */
2462         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2463
2464         ident     *const id     = id_unique("CompLit.%u");
2465         ir_type   *const irtype = get_ir_type(type);
2466         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2467         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2468         set_entity_ld_ident(entity, id);
2469
2470         set_entity_variability(entity, variability_uninitialized);
2471
2472         /* create initialisation code */
2473         initializer_t *initializer = expression->initializer;
2474         create_local_initializer(initializer, dbgi, entity, type);
2475
2476         /* create a sel for the compound literal address */
2477         ir_node *frame = get_local_frame(entity);
2478         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2479         return sel;
2480 }
2481
2482 /**
2483  * Transform a sizeof expression into Firm code.
2484  */
2485 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2486 {
2487         type_t *type = expression->type;
2488         if (type == NULL) {
2489                 type = expression->tp_expression->base.type;
2490                 assert(type != NULL);
2491         }
2492
2493         type = skip_typeref(type);
2494         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2495         if (is_type_array(type) && type->array.is_vla
2496                         && expression->tp_expression != NULL) {
2497                 expression_to_firm(expression->tp_expression);
2498         }
2499
2500         return get_type_size(type);
2501 }
2502
2503 /**
2504  * Transform an alignof expression into Firm code.
2505  */
2506 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2507 {
2508         type_t *type = expression->type;
2509         if (type == NULL) {
2510                 /* beware: if expression is a variable reference, return the
2511                    alignment of the variable. */
2512                 const expression_t *tp_expression = expression->tp_expression;
2513                 const declaration_t *declaration = expr_is_variable(tp_expression);
2514                 if (declaration != NULL) {
2515                         /* TODO: get the alignment of this variable. */
2516                 }
2517                 type = tp_expression->base.type;
2518                 assert(type != NULL);
2519         }
2520
2521         ir_mode *const mode = get_ir_mode(expression->base.type);
2522         symconst_symbol sym;
2523         sym.type_p = get_ir_type(type);
2524         return new_SymConst(mode, sym, symconst_type_align);
2525 }
2526
2527 static void init_ir_types(void);
2528 long fold_constant(const expression_t *expression)
2529 {
2530         bool constant_folding_old = constant_folding;
2531         constant_folding = true;
2532
2533         init_ir_types();
2534
2535         assert(is_constant_expression(expression));
2536
2537         ir_graph *old_current_ir_graph = current_ir_graph;
2538         if (current_ir_graph == NULL) {
2539                 current_ir_graph = get_const_code_irg();
2540         }
2541
2542         ir_node *cnst = expression_to_firm(expression);
2543         current_ir_graph = old_current_ir_graph;
2544
2545         if (!is_Const(cnst)) {
2546                 panic("couldn't fold constant\n");
2547         }
2548
2549         tarval *tv = get_Const_tarval(cnst);
2550         if (!tarval_is_long(tv)) {
2551                 panic("result of constant folding is not integer\n");
2552         }
2553
2554         constant_folding = constant_folding_old;
2555
2556         return get_tarval_long(tv);
2557 }
2558
2559 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2560 {
2561         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2562
2563         /* first try to fold a constant condition */
2564         if (is_constant_expression(expression->condition)) {
2565                 long val = fold_constant(expression->condition);
2566                 if (val) {
2567                         return expression_to_firm(expression->true_expression);
2568                 } else {
2569                         return expression_to_firm(expression->false_expression);
2570                 }
2571         }
2572
2573         ir_node *cur_block   = get_cur_block();
2574
2575         /* create the true block */
2576         ir_node *true_block  = new_immBlock();
2577
2578         ir_node *true_val = expression_to_firm(expression->true_expression);
2579         ir_node *true_jmp = new_Jmp();
2580
2581         /* create the false block */
2582         ir_node *false_block = new_immBlock();
2583
2584         ir_node *false_val = expression_to_firm(expression->false_expression);
2585         ir_node *false_jmp = new_Jmp();
2586
2587         /* create the condition evaluation */
2588         set_cur_block(cur_block);
2589         create_condition_evaluation(expression->condition, true_block, false_block);
2590         mature_immBlock(true_block);
2591         mature_immBlock(false_block);
2592
2593         /* create the common block */
2594         ir_node *common_block = new_immBlock();
2595         add_immBlock_pred(common_block, true_jmp);
2596         add_immBlock_pred(common_block, false_jmp);
2597         mature_immBlock(common_block);
2598
2599         /* TODO improve static semantics, so either both or no values are NULL */
2600         if (true_val == NULL || false_val == NULL)
2601                 return NULL;
2602
2603         ir_node *in[2] = { true_val, false_val };
2604         ir_mode *mode  = get_irn_mode(true_val);
2605         assert(get_irn_mode(false_val) == mode);
2606         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2607
2608         return val;
2609 }
2610
2611 /**
2612  * Returns an IR-node representing the address of a field.
2613  */
2614 static ir_node *select_addr(const select_expression_t *expression)
2615 {
2616         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2617
2618         ir_node *compound_addr = expression_to_firm(expression->compound);
2619
2620         /* make sure the type is constructed */
2621         type_t *type = skip_typeref(expression->compound->base.type);
2622         if (is_type_pointer(type)) {
2623                 type = type->pointer.points_to;
2624         }
2625         (void) get_ir_type(type);
2626
2627         declaration_t *entry = expression->compound_entry;
2628         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2629         ir_entity     *entity = entry->v.entity;
2630
2631         assert(entity != NULL);
2632
2633         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2634
2635         return sel;
2636 }
2637
2638 static ir_node *select_to_firm(const select_expression_t *expression)
2639 {
2640         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2641         ir_node  *addr = select_addr(expression);
2642         type_t   *type = revert_automatic_type_conversion(
2643                         (const expression_t*) expression);
2644         type           = skip_typeref(type);
2645
2646         declaration_t *entry      = expression->compound_entry;
2647         type_t        *entry_type = skip_typeref(entry->type);
2648
2649         if (entry_type->kind == TYPE_BITFIELD) {
2650                 return bitfield_extract_to_firm(expression, addr);
2651         }
2652
2653         return deref_address(dbgi, type, addr);
2654 }
2655
2656 /* Values returned by __builtin_classify_type. */
2657 typedef enum gcc_type_class
2658 {
2659         no_type_class = -1,
2660         void_type_class,
2661         integer_type_class,
2662         char_type_class,
2663         enumeral_type_class,
2664         boolean_type_class,
2665         pointer_type_class,
2666         reference_type_class,
2667         offset_type_class,
2668         real_type_class,
2669         complex_type_class,
2670         function_type_class,
2671         method_type_class,
2672         record_type_class,
2673         union_type_class,
2674         array_type_class,
2675         string_type_class,
2676         set_type_class,
2677         file_type_class,
2678         lang_type_class
2679 } gcc_type_class;
2680
2681 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2682 {
2683         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2684
2685         gcc_type_class tc;
2686         switch (type->kind)
2687         {
2688                 case TYPE_ATOMIC: {
2689                         const atomic_type_t *const atomic_type = &type->atomic;
2690                         switch (atomic_type->akind) {
2691                                 /* should not be reached */
2692                                 case ATOMIC_TYPE_INVALID:
2693                                         tc = no_type_class;
2694                                         goto make_const;
2695
2696                                 /* gcc cannot do that */
2697                                 case ATOMIC_TYPE_VOID:
2698                                         tc = void_type_class;
2699                                         goto make_const;
2700
2701                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2702                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2703                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2704                                 case ATOMIC_TYPE_SHORT:
2705                                 case ATOMIC_TYPE_USHORT:
2706                                 case ATOMIC_TYPE_INT:
2707                                 case ATOMIC_TYPE_UINT:
2708                                 case ATOMIC_TYPE_LONG:
2709                                 case ATOMIC_TYPE_ULONG:
2710                                 case ATOMIC_TYPE_LONGLONG:
2711                                 case ATOMIC_TYPE_ULONGLONG:
2712                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2713                                         tc = integer_type_class;
2714                                         goto make_const;
2715
2716                                 case ATOMIC_TYPE_FLOAT:
2717                                 case ATOMIC_TYPE_DOUBLE:
2718                                 case ATOMIC_TYPE_LONG_DOUBLE:
2719                                         tc = real_type_class;
2720                                         goto make_const;
2721                         }
2722                         panic("Unexpected atomic type in classify_type_to_firm().");
2723                 }
2724
2725                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2726                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2727                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2728                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2729                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2730                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2731                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2732                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2733
2734                 /* gcc handles this as integer */
2735                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2736
2737                 case TYPE_BUILTIN:
2738                 /* typedef/typeof should be skipped already */
2739                 case TYPE_TYPEDEF:
2740                 case TYPE_TYPEOF:
2741                 case TYPE_INVALID:
2742                 case TYPE_ERROR:
2743                         break;
2744         }
2745         panic("unexpected TYPE classify_type_to_firm().");
2746
2747 make_const: ;
2748         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2749         ir_mode  *const mode = mode_int;
2750         tarval   *const tv   = new_tarval_from_long(tc, mode);
2751         return new_d_Const(dbgi, mode, tv);
2752 }
2753
2754 static ir_node *function_name_to_firm(
2755                 const funcname_expression_t *const expr)
2756 {
2757         switch(expr->kind) {
2758         case FUNCNAME_FUNCTION:
2759         case FUNCNAME_PRETTY_FUNCTION:
2760         case FUNCNAME_FUNCDNAME:
2761                 if (current_function_name == NULL) {
2762                         const source_position_t *const src_pos = &expr->base.source_position;
2763                         const char *const name = current_function_decl->symbol->string;
2764                         const string_t string = { name, strlen(name) + 1 };
2765                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2766                 }
2767                 return current_function_name;
2768         case FUNCNAME_FUNCSIG:
2769                 if (current_funcsig == NULL) {
2770                         const source_position_t *const src_pos = &expr->base.source_position;
2771                         ir_entity *ent = get_irg_entity(current_ir_graph);
2772                         const char *const name = get_entity_ld_name(ent);
2773                         const string_t string = { name, strlen(name) + 1 };
2774                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2775                 }
2776                 return current_funcsig;
2777         }
2778         panic("Unsupported function name");
2779 }
2780
2781 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2782 {
2783         statement_t *statement = expr->statement;
2784
2785         assert(statement->kind == STATEMENT_COMPOUND);
2786         return compound_statement_to_firm(&statement->compound);
2787 }
2788
2789 static ir_node *va_start_expression_to_firm(
2790         const va_start_expression_t *const expr)
2791 {
2792         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2793         int        const n           = get_method_n_params(method_type) - 1;
2794         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2795         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2796         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2797         ir_node   *const no_mem      = new_NoMem();
2798         ir_node   *const arg_sel     =
2799                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2800
2801         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2802         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2803         set_value_for_expression(expr->ap, add);
2804
2805         return NULL;
2806 }
2807
2808 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2809 {
2810         type_t       *const type    = expr->base.type;
2811         expression_t *const ap_expr = expr->ap;
2812         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2813         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2814         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2815         ir_node      *const res     = deref_address(dbgi, type, ap);
2816
2817         ir_node      *const cnst    = get_type_size(expr->base.type);
2818         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2819
2820         set_value_for_expression_addr(ap_expr, add, ap_addr);
2821
2822         return res;
2823 }
2824
2825 static ir_node *dereference_addr(const unary_expression_t *const expression)
2826 {
2827         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2828         return expression_to_firm(expression->value);
2829 }
2830
2831 /**
2832  * Returns a IR-node representing an lvalue of the given expression.
2833  */
2834 static ir_node *expression_to_addr(const expression_t *expression)
2835 {
2836         switch(expression->kind) {
2837         case EXPR_REFERENCE:
2838                 return reference_addr(&expression->reference);
2839         case EXPR_ARRAY_ACCESS:
2840                 return array_access_addr(&expression->array_access);
2841         case EXPR_SELECT:
2842                 return select_addr(&expression->select);
2843         case EXPR_CALL:
2844                 return call_expression_to_firm(&expression->call);
2845         case EXPR_UNARY_DEREFERENCE: {
2846                 return dereference_addr(&expression->unary);
2847         }
2848         default:
2849                 break;
2850         }
2851         panic("trying to get address of non-lvalue");
2852 }
2853
2854 static ir_node *builtin_constant_to_firm(
2855                 const builtin_constant_expression_t *expression)
2856 {
2857         ir_mode *mode = get_ir_mode(expression->base.type);
2858         long     v;
2859
2860         if (is_constant_expression(expression->value)) {
2861                 v = 1;
2862         } else {
2863                 v = 0;
2864         }
2865         return new_Const_long(mode, v);
2866 }
2867
2868 static ir_node *builtin_prefetch_to_firm(
2869                 const builtin_prefetch_expression_t *expression)
2870 {
2871         ir_node *adr = expression_to_firm(expression->adr);
2872         /* no Firm support for prefetch yet */
2873         (void) adr;
2874         return NULL;
2875 }
2876
2877 /**
2878  * creates firm nodes for an expression. The difference between this function
2879  * and expression_to_firm is, that this version might produce mode_b nodes
2880  * instead of mode_Is.
2881  */
2882 static ir_node *_expression_to_firm(const expression_t *expression)
2883 {
2884 #ifndef NDEBUG
2885         if (!constant_folding) {
2886                 assert(!expression->base.transformed);
2887                 ((expression_t*) expression)->base.transformed = true;
2888         }
2889 #endif
2890
2891         switch(expression->kind) {
2892         case EXPR_CHARACTER_CONSTANT:
2893                 return character_constant_to_firm(&expression->conste);
2894         case EXPR_WIDE_CHARACTER_CONSTANT:
2895                 return wide_character_constant_to_firm(&expression->conste);
2896         case EXPR_CONST:
2897                 return const_to_firm(&expression->conste);
2898         case EXPR_STRING_LITERAL:
2899                 return string_literal_to_firm(&expression->string);
2900         case EXPR_WIDE_STRING_LITERAL:
2901                 return wide_string_literal_to_firm(&expression->wide_string);
2902         case EXPR_REFERENCE:
2903                 return reference_expression_to_firm(&expression->reference);
2904         case EXPR_CALL:
2905                 return call_expression_to_firm(&expression->call);
2906         EXPR_UNARY_CASES
2907                 return unary_expression_to_firm(&expression->unary);
2908         EXPR_BINARY_CASES
2909                 return binary_expression_to_firm(&expression->binary);
2910         case EXPR_ARRAY_ACCESS:
2911                 return array_access_to_firm(&expression->array_access);
2912         case EXPR_SIZEOF:
2913                 return sizeof_to_firm(&expression->typeprop);
2914         case EXPR_ALIGNOF:
2915                 return alignof_to_firm(&expression->typeprop);
2916         case EXPR_CONDITIONAL:
2917                 return conditional_to_firm(&expression->conditional);
2918         case EXPR_SELECT:
2919                 return select_to_firm(&expression->select);
2920         case EXPR_CLASSIFY_TYPE:
2921                 return classify_type_to_firm(&expression->classify_type);
2922         case EXPR_FUNCNAME:
2923                 return function_name_to_firm(&expression->funcname);
2924         case EXPR_STATEMENT:
2925                 return statement_expression_to_firm(&expression->statement);
2926         case EXPR_VA_START:
2927                 return va_start_expression_to_firm(&expression->va_starte);
2928         case EXPR_VA_ARG:
2929                 return va_arg_expression_to_firm(&expression->va_arge);
2930         case EXPR_BUILTIN_SYMBOL:
2931                 panic("unimplemented expression found");
2932         case EXPR_BUILTIN_CONSTANT_P:
2933                 return builtin_constant_to_firm(&expression->builtin_constant);
2934         case EXPR_BUILTIN_PREFETCH:
2935                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2936         case EXPR_OFFSETOF:
2937                 return offsetof_to_firm(&expression->offsetofe);
2938         case EXPR_COMPOUND_LITERAL:
2939                 return compound_literal_to_firm(&expression->compound_literal);
2940
2941         case EXPR_UNKNOWN:
2942         case EXPR_INVALID:
2943                 break;
2944         }
2945         panic("invalid expression found");
2946 }
2947
2948 static bool produces_mode_b(const expression_t *expression)
2949 {
2950         switch (expression->kind) {
2951         case EXPR_BINARY_EQUAL:
2952         case EXPR_BINARY_NOTEQUAL:
2953         case EXPR_BINARY_LESS:
2954         case EXPR_BINARY_LESSEQUAL:
2955         case EXPR_BINARY_GREATER:
2956         case EXPR_BINARY_GREATEREQUAL:
2957         case EXPR_BINARY_ISGREATER:
2958         case EXPR_BINARY_ISGREATEREQUAL:
2959         case EXPR_BINARY_ISLESS:
2960         case EXPR_BINARY_ISLESSEQUAL:
2961         case EXPR_BINARY_ISLESSGREATER:
2962         case EXPR_BINARY_ISUNORDERED:
2963         case EXPR_UNARY_NOT:
2964                 return true;
2965
2966         case EXPR_BINARY_BUILTIN_EXPECT:
2967                 return produces_mode_b(expression->binary.left);
2968         case EXPR_BINARY_COMMA:
2969                 return produces_mode_b(expression->binary.right);
2970
2971         default:
2972                 return false;
2973         }
2974 }
2975
2976 static ir_node *expression_to_firm(const expression_t *expression)
2977 {
2978         if (!produces_mode_b(expression)) {
2979                 ir_node *res = _expression_to_firm(expression);
2980                 assert(res == NULL || get_irn_mode(res) != mode_b);
2981                 return res;
2982         }
2983
2984         if (is_constant_expression(expression)) {
2985                 ir_node *res  = _expression_to_firm(expression);
2986                 ir_mode *mode = get_ir_mode(expression->base.type);
2987                 assert(is_Const(res));
2988                 if (is_Const_null(res)) {
2989                         return new_Const_long(mode, 0);
2990                 } else {
2991                         return new_Const_long(mode, 1);
2992                 }
2993         }
2994
2995         /* we have to produce a 0/1 from the mode_b expression */
2996         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2997         return produce_condition_result(expression, dbgi);
2998 }
2999
3000 static ir_node *expression_to_modeb(const expression_t *expression)
3001 {
3002         ir_node *res = _expression_to_firm(expression);
3003         res          = create_conv(NULL, res, mode_b);
3004
3005         return res;
3006 }
3007
3008 /**
3009  * create a short-circuit expression evaluation that tries to construct
3010  * efficient control flow structures for &&, || and ! expressions
3011  */
3012 static void create_condition_evaluation(const expression_t *expression,
3013                                         ir_node *true_block,
3014                                         ir_node *false_block)
3015 {
3016         switch(expression->kind) {
3017         case EXPR_UNARY_NOT: {
3018                 const unary_expression_t *unary_expression = &expression->unary;
3019                 create_condition_evaluation(unary_expression->value, false_block,
3020                                             true_block);
3021                 return;
3022         }
3023         case EXPR_BINARY_LOGICAL_AND: {
3024                 const binary_expression_t *binary_expression = &expression->binary;
3025
3026                 ir_node *cur_block   = get_cur_block();
3027                 ir_node *extra_block = new_immBlock();
3028                 set_cur_block(cur_block);
3029                 create_condition_evaluation(binary_expression->left, extra_block,
3030                                             false_block);
3031                 mature_immBlock(extra_block);
3032                 set_cur_block(extra_block);
3033                 create_condition_evaluation(binary_expression->right, true_block,
3034                                             false_block);
3035                 return;
3036         }
3037         case EXPR_BINARY_LOGICAL_OR: {
3038                 const binary_expression_t *binary_expression = &expression->binary;
3039
3040                 ir_node *cur_block   = get_cur_block();
3041                 ir_node *extra_block = new_immBlock();
3042                 set_cur_block(cur_block);
3043                 create_condition_evaluation(binary_expression->left, true_block,
3044                                             extra_block);
3045                 mature_immBlock(extra_block);
3046                 set_cur_block(extra_block);
3047                 create_condition_evaluation(binary_expression->right, true_block,
3048                                             false_block);
3049                 return;
3050         }
3051         default:
3052                 break;
3053         }
3054
3055         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3056         ir_node  *condition  = expression_to_modeb(expression);
3057         ir_node  *cond       = new_d_Cond(dbgi, condition);
3058         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3059         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3060
3061         /* set branch prediction info based on __builtin_expect */
3062         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3063                 long               cnst = fold_constant(expression->binary.right);
3064                 cond_jmp_predicate pred;
3065
3066                 if (cnst == 0) {
3067                         pred = COND_JMP_PRED_FALSE;
3068                 } else {
3069                         pred = COND_JMP_PRED_TRUE;
3070                 }
3071                 set_Cond_jmp_pred(cond, pred);
3072         }
3073
3074         add_immBlock_pred(true_block, true_proj);
3075         if (false_block != NULL) {
3076                 add_immBlock_pred(false_block, false_proj);
3077         }
3078
3079         set_cur_block(NULL);
3080 }
3081
3082
3083
3084 static void create_declaration_entity(declaration_t *declaration,
3085                                       declaration_kind_t declaration_kind,
3086                                       ir_type *parent_type)
3087 {
3088         type_t    *const type   = skip_typeref(declaration->type);
3089         if (is_type_function(type)) {
3090                 (void) get_function_entity(declaration);
3091                 return;
3092         }
3093
3094         ident     *const id     = new_id_from_str(declaration->symbol->string);
3095         ir_type   *const irtype = get_ir_type(type);
3096         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
3097         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
3098
3099         declaration->declaration_kind = (unsigned char) declaration_kind;
3100         declaration->v.entity         = entity;
3101         set_entity_variability(entity, variability_uninitialized);
3102         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3103         if (parent_type == get_tls_type())
3104                 set_entity_allocation(entity, allocation_automatic);
3105         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3106                 set_entity_allocation(entity, allocation_static);
3107
3108         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3109                 set_entity_volatility(entity, volatility_is_volatile);
3110         }
3111 }
3112
3113
3114 typedef struct type_path_entry_t type_path_entry_t;
3115 struct type_path_entry_t {
3116         type_t           *type;
3117         ir_initializer_t *initializer;
3118         size_t            index;
3119         declaration_t    *compound_entry;
3120 };
3121
3122 typedef struct type_path_t type_path_t;
3123 struct type_path_t {
3124         type_path_entry_t *path;
3125         type_t            *top_type;
3126         bool               invalid;
3127 };
3128
3129 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3130 {
3131         size_t len = ARR_LEN(path->path);
3132
3133         for(size_t i = 0; i < len; ++i) {
3134                 const type_path_entry_t *entry = & path->path[i];
3135
3136                 type_t *type = skip_typeref(entry->type);
3137                 if (is_type_compound(type)) {
3138                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
3139                 } else if (is_type_array(type)) {
3140                         fprintf(stderr, "[%zd]", entry->index);
3141                 } else {
3142                         fprintf(stderr, "-INVALID-");
3143                 }
3144         }
3145         fprintf(stderr, "  (");
3146         print_type(path->top_type);
3147         fprintf(stderr, ")");
3148 }
3149
3150 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3151 {
3152         size_t len = ARR_LEN(path->path);
3153         assert(len > 0);
3154         return & path->path[len-1];
3155 }
3156
3157 static type_path_entry_t *append_to_type_path(type_path_t *path)
3158 {
3159         size_t len = ARR_LEN(path->path);
3160         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3161
3162         type_path_entry_t *result = & path->path[len];
3163         memset(result, 0, sizeof(result[0]));
3164         return result;
3165 }
3166
3167 static size_t get_compound_size(const compound_type_t *type)
3168 {
3169         declaration_t *declaration = type->declaration;
3170         declaration_t *member      = declaration->scope.declarations;
3171         size_t         size        = 0;
3172         for( ; member != NULL; member = member->next) {
3173                 ++size;
3174         }
3175         /* TODO: cache results? */
3176
3177         return size;
3178 }
3179
3180 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3181 {
3182         type_t *orig_top_type = path->top_type;
3183         type_t *top_type      = skip_typeref(orig_top_type);
3184
3185         assert(is_type_compound(top_type) || is_type_array(top_type));
3186
3187         if (ARR_LEN(path->path) == 0) {
3188                 return NULL;
3189         } else {
3190                 type_path_entry_t *top         = get_type_path_top(path);
3191                 ir_initializer_t  *initializer = top->initializer;
3192                 return get_initializer_compound_value(initializer, top->index);
3193         }
3194 }
3195
3196 static void descend_into_subtype(type_path_t *path)
3197 {
3198         type_t *orig_top_type = path->top_type;
3199         type_t *top_type      = skip_typeref(orig_top_type);
3200
3201         assert(is_type_compound(top_type) || is_type_array(top_type));
3202
3203         ir_initializer_t *initializer = get_initializer_entry(path);
3204
3205         type_path_entry_t *top = append_to_type_path(path);
3206         top->type              = top_type;
3207
3208         size_t len;
3209
3210         if (is_type_compound(top_type)) {
3211                 declaration_t *declaration = top_type->compound.declaration;
3212                 declaration_t *entry       = declaration->scope.declarations;
3213
3214                 top->compound_entry = entry;
3215                 top->index          = 0;
3216                 len                 = get_compound_size(&top_type->compound);
3217                 if (entry != NULL)
3218                         path->top_type = entry->type;
3219         } else {
3220                 assert(is_type_array(top_type));
3221                 assert(top_type->array.size > 0);
3222
3223                 top->index     = 0;
3224                 path->top_type = top_type->array.element_type;
3225                 len            = top_type->array.size;
3226         }
3227         if (initializer == NULL
3228                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3229                 initializer = create_initializer_compound(len);
3230                 /* we have to set the entry at the 2nd latest path entry... */
3231                 size_t path_len = ARR_LEN(path->path);
3232                 assert(path_len >= 1);
3233                 if (path_len > 1) {
3234                         type_path_entry_t *entry        = & path->path[path_len-2];
3235                         ir_initializer_t  *tinitializer = entry->initializer;
3236                         set_initializer_compound_value(tinitializer, entry->index,
3237                                                        initializer);
3238                 }
3239         }
3240         top->initializer = initializer;
3241 }
3242
3243 static void ascend_from_subtype(type_path_t *path)
3244 {
3245         type_path_entry_t *top = get_type_path_top(path);
3246
3247         path->top_type = top->type;
3248
3249         size_t len = ARR_LEN(path->path);
3250         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3251 }
3252
3253 static void walk_designator(type_path_t *path, const designator_t *designator)
3254 {
3255         /* designators start at current object type */
3256         ARR_RESIZE(type_path_entry_t, path->path, 1);
3257
3258         for( ; designator != NULL; designator = designator->next) {
3259                 type_path_entry_t *top         = get_type_path_top(path);
3260                 type_t            *orig_type   = top->type;
3261                 type_t            *type        = skip_typeref(orig_type);
3262
3263                 if (designator->symbol != NULL) {
3264                         assert(is_type_compound(type));
3265                         size_t    index  = 0;
3266                         symbol_t *symbol = designator->symbol;
3267
3268                         declaration_t *declaration = type->compound.declaration;
3269                         declaration_t *iter        = declaration->scope.declarations;
3270                         for( ; iter != NULL; iter = iter->next, ++index) {
3271                                 if (iter->symbol == symbol) {
3272                                         break;
3273                                 }
3274                         }
3275                         assert(iter != NULL);
3276
3277                         top->type           = orig_type;
3278                         top->compound_entry = iter;
3279                         top->index          = index;
3280                         orig_type           = iter->type;
3281                 } else {
3282                         expression_t *array_index = designator->array_index;
3283                         assert(designator->array_index != NULL);
3284                         assert(is_type_array(type));
3285                         assert(is_type_valid(array_index->base.type));
3286
3287                         long index = fold_constant(array_index);
3288                         assert(index >= 0);
3289 #ifndef NDEBUG
3290                         if (type->array.size_constant == 1) {
3291                                 long array_size = type->array.size;
3292                                 assert(index < array_size);
3293                         }
3294 #endif
3295
3296                         top->type  = orig_type;
3297                         top->index = (size_t) index;
3298                         orig_type  = type->array.element_type;
3299                 }
3300                 path->top_type = orig_type;
3301
3302                 if (designator->next != NULL) {
3303                         descend_into_subtype(path);
3304                 }
3305         }
3306
3307         path->invalid  = false;
3308 }
3309
3310 static void advance_current_object(type_path_t *path)
3311 {
3312         if (path->invalid) {
3313                 /* TODO: handle this... */
3314                 panic("invalid initializer in ast2firm (excessive elements)");
3315                 return;
3316         }
3317
3318         type_path_entry_t *top = get_type_path_top(path);
3319
3320         type_t *type = skip_typeref(top->type);
3321         if (is_type_union(type)) {
3322                 top->compound_entry = NULL;
3323         } else if (is_type_struct(type)) {
3324                 declaration_t *entry = top->compound_entry;
3325
3326                 top->index++;
3327                 entry               = entry->next;
3328                 top->compound_entry = entry;
3329                 if (entry != NULL) {
3330                         path->top_type = entry->type;
3331                         return;
3332                 }
3333         } else {
3334                 assert(is_type_array(type));
3335
3336                 top->index++;
3337                 if (!type->array.size_constant || top->index < type->array.size) {
3338                         return;
3339                 }
3340         }
3341
3342         /* we're past the last member of the current sub-aggregate, try if we
3343          * can ascend in the type hierarchy and continue with another subobject */
3344         size_t len = ARR_LEN(path->path);
3345
3346         if (len > 1) {
3347                 ascend_from_subtype(path);
3348                 advance_current_object(path);
3349         } else {
3350                 path->invalid = true;
3351         }
3352 }
3353
3354
3355 static ir_initializer_t *create_ir_initializer(
3356                 const initializer_t *initializer, type_t *type);
3357
3358 static ir_initializer_t *create_ir_initializer_value(
3359                 const initializer_value_t *initializer)
3360 {
3361         if (is_type_compound(initializer->value->base.type)) {
3362                 panic("initializer creation for compounds not implemented yet");
3363         }
3364         ir_node *value = expression_to_firm(initializer->value);
3365         return create_initializer_const(value);
3366 }
3367
3368 static ir_initializer_t *create_ir_initializer_list(
3369                 const initializer_list_t *initializer, type_t *type)
3370 {
3371         type_path_t path;
3372         memset(&path, 0, sizeof(path));
3373         path.top_type = type;
3374         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3375
3376         descend_into_subtype(&path);
3377
3378         for(size_t i = 0; i < initializer->len; ++i) {
3379                 const initializer_t *sub_initializer = initializer->initializers[i];
3380
3381                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3382                         walk_designator(&path, sub_initializer->designator.designator);
3383                         continue;
3384                 }
3385
3386                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3387                         /* we might have to descend into types until we're at a scalar
3388                          * type */
3389                         while(true) {
3390                                 type_t *orig_top_type = path.top_type;
3391                                 type_t *top_type      = skip_typeref(orig_top_type);
3392
3393                                 if (is_type_scalar(top_type))
3394                                         break;
3395                                 descend_into_subtype(&path);
3396                         }
3397                 }
3398
3399                 ir_initializer_t *sub_irinitializer
3400                         = create_ir_initializer(sub_initializer, path.top_type);
3401
3402                 size_t path_len = ARR_LEN(path.path);
3403                 assert(path_len >= 1);
3404                 type_path_entry_t *entry        = & path.path[path_len-1];
3405                 ir_initializer_t  *tinitializer = entry->initializer;
3406                 set_initializer_compound_value(tinitializer, entry->index,
3407                                                sub_irinitializer);
3408
3409                 advance_current_object(&path);
3410         }
3411
3412         assert(ARR_LEN(path.path) >= 1);
3413         ir_initializer_t *result = path.path[0].initializer;
3414         DEL_ARR_F(path.path);
3415
3416         return result;
3417 }
3418
3419 static ir_initializer_t *create_ir_initializer_string(
3420                 const initializer_string_t *initializer, type_t *type)
3421 {
3422         type = skip_typeref(type);
3423
3424         size_t            string_len    = initializer->string.size;
3425         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3426         size_t            len           = type->array.size;
3427         ir_initializer_t *irinitializer = create_initializer_compound(len);
3428
3429         const char *string = initializer->string.begin;
3430         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3431
3432         for(size_t i = 0; i < len; ++i) {
3433                 char c = 0;
3434                 if (i < string_len)
3435                         c = string[i];
3436
3437                 tarval           *tv = new_tarval_from_long(c, mode);
3438                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3439
3440                 set_initializer_compound_value(irinitializer, i, char_initializer);
3441         }
3442
3443         return irinitializer;
3444 }
3445
3446 static ir_initializer_t *create_ir_initializer_wide_string(
3447                 const initializer_wide_string_t *initializer, type_t *type)
3448 {
3449         size_t            string_len    = initializer->string.size;
3450         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3451         size_t            len           = type->array.size;
3452         ir_initializer_t *irinitializer = create_initializer_compound(len);
3453
3454         const wchar_rep_t *string = initializer->string.begin;
3455         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3456
3457         for(size_t i = 0; i < len; ++i) {
3458                 wchar_rep_t c = 0;
3459                 if (i < string_len) {
3460                         c = string[i];
3461                 }
3462                 tarval *tv = new_tarval_from_long(c, mode);
3463                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3464
3465                 set_initializer_compound_value(irinitializer, i, char_initializer);
3466         }
3467
3468         return irinitializer;
3469 }
3470
3471 static ir_initializer_t *create_ir_initializer(
3472                 const initializer_t *initializer, type_t *type)
3473 {
3474         switch(initializer->kind) {
3475                 case INITIALIZER_STRING:
3476                         return create_ir_initializer_string(&initializer->string, type);
3477
3478                 case INITIALIZER_WIDE_STRING:
3479                         return create_ir_initializer_wide_string(&initializer->wide_string,
3480                                                                  type);
3481
3482                 case INITIALIZER_LIST:
3483                         return create_ir_initializer_list(&initializer->list, type);
3484
3485                 case INITIALIZER_VALUE:
3486                         return create_ir_initializer_value(&initializer->value);
3487
3488                 case INITIALIZER_DESIGNATOR:
3489                         panic("unexpected designator initializer found");
3490         }
3491         panic("unknown initializer");
3492 }
3493
3494 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3495                 ir_node *base_addr)
3496 {
3497         if (is_atomic_type(type)) {
3498                 ir_mode *mode = get_type_mode(type);
3499                 tarval  *zero = get_mode_null(mode);
3500                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3501
3502                 /* TODO: bitfields */
3503                 ir_node *mem    = get_store();
3504                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3505                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3506                 set_store(proj_m);
3507         } else {
3508                 assert(is_compound_type(type));
3509
3510                 int n_members;
3511                 if (is_Array_type(type)) {
3512                         assert(has_array_upper_bound(type, 0));
3513                         n_members = get_array_upper_bound_int(type, 0);
3514                 } else {
3515                         n_members = get_compound_n_members(type);
3516                 }
3517
3518                 for(int i = 0; i < n_members; ++i) {
3519                         ir_node *addr;
3520                         ir_type *irtype;
3521                         if (is_Array_type(type)) {
3522                                 ir_entity *entity   = get_array_element_entity(type);
3523                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3524                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3525                                 ir_node   *in[1]    = { cnst };
3526                                 irtype = get_array_element_type(type);
3527                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3528                         } else {
3529                                 ir_entity *member = get_compound_member(type, i);
3530
3531                                 irtype = get_entity_type(member);
3532                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3533                         }
3534
3535                         create_dynamic_null_initializer(irtype, dbgi, addr);
3536                 }
3537         }
3538 }
3539
3540 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3541                 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3542 {
3543         switch(get_initializer_kind(initializer)) {
3544         case IR_INITIALIZER_NULL: {
3545                 create_dynamic_null_initializer(type, dbgi, base_addr);
3546                 return;
3547         }
3548         case IR_INITIALIZER_CONST: {
3549                 ir_node *node = get_initializer_const_value(initializer);
3550                 ir_mode *mode = get_irn_mode(node);
3551                 assert(get_type_mode(type) == mode);
3552
3553                 /* TODO: bitfields... */
3554                 ir_node *mem    = get_store();
3555                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3556                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3557                 set_store(proj_m);
3558                 return;
3559         }
3560         case IR_INITIALIZER_TARVAL: {
3561                 tarval  *tv   = get_initializer_tarval_value(initializer);
3562                 ir_mode *mode = get_tarval_mode(tv);
3563                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3564                 assert(get_type_mode(type) == mode);
3565
3566                 /* TODO: bitfields... */
3567                 ir_node *mem    = get_store();
3568                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3569                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3570                 set_store(proj_m);
3571                 return;
3572         }
3573         case IR_INITIALIZER_COMPOUND: {
3574                 assert(is_compound_type(type));
3575                 int n_members;
3576                 if (is_Array_type(type)) {
3577                         assert(has_array_upper_bound(type, 0));
3578                         n_members = get_array_upper_bound_int(type, 0);
3579                 } else {
3580                         n_members = get_compound_n_members(type);
3581                 }
3582
3583                 if (get_initializer_compound_n_entries(initializer)
3584                                 != (unsigned) n_members)
3585                         panic("initializer doesn't match compound type");
3586
3587                 for(int i = 0; i < n_members; ++i) {
3588                         ir_node *addr;
3589                         ir_type *irtype;
3590                         if (is_Array_type(type)) {
3591                                 ir_entity *entity   = get_array_element_entity(type);
3592                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3593                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3594                                 ir_node   *in[1]    = { cnst };
3595                                 irtype = get_array_element_type(type);
3596                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3597                         } else {
3598                                 ir_entity *member = get_compound_member(type, i);
3599
3600                                 irtype = get_entity_type(member);
3601                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3602                         }
3603
3604                         ir_initializer_t *sub_init
3605                                 = get_initializer_compound_value(initializer, i);
3606
3607                         create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3608                 }
3609                 return;
3610         }
3611         }
3612
3613         panic("invalid IR_INITIALIZER found");
3614 }
3615
3616 static void create_dynamic_initializer(ir_initializer_t *initializer,
3617                 dbg_info *dbgi, ir_entity *entity)
3618 {
3619         ir_node *frame     = get_local_frame(entity);
3620         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3621         ir_type *type      = get_entity_type(entity);
3622
3623         create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3624 }
3625
3626 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3627                                      ir_entity *entity, type_t *type)
3628 {
3629         ir_node *memory = get_store();
3630         ir_node *nomem  = new_NoMem();
3631         ir_node *frame  = get_irg_frame(current_ir_graph);
3632         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3633
3634         if (initializer->kind == INITIALIZER_VALUE) {
3635                 initializer_value_t *initializer_value = &initializer->value;
3636
3637                 ir_node *value = expression_to_firm(initializer_value->value);
3638                 type = skip_typeref(type);
3639                 assign_value(dbgi, addr, type, value);
3640                 return;
3641         }
3642
3643         if (!is_constant_initializer(initializer)) {
3644                 ir_initializer_t *irinitializer
3645                         = create_ir_initializer(initializer, type);
3646
3647                 create_dynamic_initializer(irinitializer, dbgi, entity);
3648                 return;
3649         }
3650
3651         /* create the ir_initializer */
3652         ir_graph *const old_current_ir_graph = current_ir_graph;
3653         current_ir_graph = get_const_code_irg();
3654
3655         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3656
3657         assert(current_ir_graph == get_const_code_irg());
3658         current_ir_graph = old_current_ir_graph;
3659
3660         /* create a "template" entity which is copied to the entity on the stack */
3661         ident     *const id          = id_unique("initializer.%u");
3662         ir_type   *const irtype      = get_ir_type(type);
3663         ir_type   *const global_type = get_glob_type();
3664         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3665         set_entity_ld_ident(init_entity, id);
3666
3667         set_entity_variability(init_entity, variability_initialized);
3668         set_entity_visibility(init_entity, visibility_local);
3669         set_entity_allocation(init_entity, allocation_static);
3670
3671         set_entity_initializer(init_entity, irinitializer);
3672
3673         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3674         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3675
3676         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3677         set_store(copyb_mem);
3678 }
3679
3680 static void create_initializer_local_variable_entity(declaration_t *declaration)
3681 {
3682         initializer_t *initializer = declaration->init.initializer;
3683         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3684         ir_entity     *entity      = declaration->v.entity;
3685         type_t        *type        = declaration->type;
3686         create_local_initializer(initializer, dbgi, entity, type);
3687 }
3688
3689 static void create_declaration_initializer(declaration_t *declaration)
3690 {
3691         initializer_t *initializer = declaration->init.initializer;
3692         if (initializer == NULL)
3693                 return;
3694
3695         declaration_kind_t declaration_kind
3696                 = (declaration_kind_t) declaration->declaration_kind;
3697         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3698                 create_initializer_local_variable_entity(declaration);
3699                 return;
3700         }
3701
3702         type_t *type = skip_typeref(declaration->type);
3703
3704         if (initializer->kind == INITIALIZER_VALUE) {
3705                 initializer_value_t *initializer_value = &initializer->value;
3706                 dbg_info            *dbgi
3707                         = get_dbg_info(&declaration->source_position);
3708
3709                 ir_node *value = expression_to_firm(initializer_value->value);
3710                 value = do_strict_conv(dbgi, value);
3711
3712                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3713                         set_value(declaration->v.value_number, value);
3714                 } else {
3715                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3716
3717                         ir_entity *entity = declaration->v.entity;
3718
3719                         if (type->base.qualifiers & TYPE_QUALIFIER_CONST) {
3720                                 set_entity_variability(entity, variability_constant);
3721                         } else {
3722                                 set_entity_variability(entity, variability_initialized);
3723                         }
3724                         set_atomic_ent_value(entity, value);
3725                 }
3726         } else {
3727                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3728                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3729
3730                 ir_entity        *entity        = declaration->v.entity;
3731                 ir_initializer_t *irinitializer
3732                         = create_ir_initializer(initializer, type);
3733
3734                 if (type->base.qualifiers & TYPE_QUALIFIER_CONST) {
3735                         set_entity_variability(entity, variability_constant);
3736                 } else {
3737                         set_entity_variability(entity, variability_initialized);
3738                 }
3739                 set_entity_initializer(entity, irinitializer);
3740         }
3741 }
3742
3743 static void create_variable_length_array(declaration_t *declaration)
3744 {
3745         /* initializers are not allowed for VLAs */
3746         assert(declaration->init.initializer == NULL);
3747
3748         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3749         declaration->v.vla_base       = NULL;
3750
3751         /* TODO: record VLA somewhere so we create the free node when we leave
3752          * it's scope */
3753 }
3754
3755 static void allocate_variable_length_array(declaration_t *declaration)
3756 {
3757         /* initializers are not allowed for VLAs */
3758         assert(declaration->init.initializer == NULL);
3759         assert(get_cur_block() != NULL);
3760
3761         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3762         type_t   *type      = declaration->type;
3763         ir_type  *el_type   = get_ir_type(type->array.element_type);
3764
3765         /* make sure size_node is calculated */
3766         get_type_size(type);
3767         ir_node  *elems = type->array.size_node;
3768         ir_node  *mem   = get_store();
3769         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3770
3771         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3772         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3773         set_store(proj_m);
3774
3775         assert(declaration->declaration_kind
3776                         == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3777         declaration->v.vla_base       = addr;
3778 }
3779
3780 /**
3781  * Creates a Firm local variable from a declaration.
3782  */
3783 static void create_local_variable(declaration_t *declaration)
3784 {
3785         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3786
3787         bool needs_entity = declaration->address_taken;
3788         type_t *type = skip_typeref(declaration->type);
3789
3790         /* is it a variable length array? */
3791         if (is_type_array(type) && !type->array.size_constant) {
3792                 create_variable_length_array(declaration);
3793                 return;
3794         } else if (is_type_array(type) || is_type_compound(type)) {
3795                 needs_entity = true;
3796         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3797                 needs_entity = true;
3798         }
3799
3800         if (needs_entity) {
3801                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3802                 create_declaration_entity(declaration,
3803                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3804                                           frame_type);
3805         } else {
3806                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3807                 declaration->v.value_number   = next_value_number_function;
3808                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3809                 ++next_value_number_function;
3810         }
3811 }
3812
3813 static void create_local_static_variable(declaration_t *declaration)
3814 {
3815         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3816
3817         type_t    *const type        = skip_typeref(declaration->type);
3818         ir_type   *const global_type = get_glob_type();
3819         ir_type   *const irtype      = get_ir_type(type);
3820         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3821
3822         size_t l = strlen(declaration->symbol->string);
3823         char   buf[l + sizeof(".%u")];
3824         snprintf(buf, sizeof(buf), "%s.%%u", declaration->symbol->string);
3825         ident     *const id = id_unique(buf);
3826
3827         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3828
3829         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3830                 set_entity_volatility(entity, volatility_is_volatile);
3831         }
3832
3833         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3834         declaration->v.entity         = entity;
3835         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3836         set_entity_variability(entity, variability_uninitialized);
3837         set_entity_visibility(entity, visibility_local);
3838         set_entity_allocation(entity, allocation_static);
3839
3840         ir_graph *const old_current_ir_graph = current_ir_graph;
3841         current_ir_graph = get_const_code_irg();
3842
3843         create_declaration_initializer(declaration);
3844
3845         assert(current_ir_graph == get_const_code_irg());
3846         current_ir_graph = old_current_ir_graph;
3847 }
3848
3849
3850
3851 static void return_statement_to_firm(return_statement_t *statement)
3852 {
3853         if (get_cur_block() == NULL)
3854                 return;
3855
3856         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3857         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3858
3859
3860         ir_node *in[1];
3861         int      in_len;
3862         if (get_method_n_ress(func_irtype) > 0) {
3863                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3864
3865                 if (statement->value != NULL) {
3866                         ir_node *node = expression_to_firm(statement->value);
3867                         node  = do_strict_conv(dbgi, node);
3868                         in[0] = node;
3869                 } else {
3870                         ir_mode *mode;
3871                         if (is_compound_type(res_type)) {
3872                                 mode = mode_P_data;
3873                         } else {
3874                                 mode = get_type_mode(res_type);
3875                         }
3876                         in[0] = new_Unknown(mode);
3877                 }
3878                 in_len = 1;
3879         } else {
3880                 /* build return_value for its side effects */
3881                 if (statement->value != NULL) {
3882                         expression_to_firm(statement->value);
3883                 }
3884                 in_len = 0;
3885         }
3886
3887         ir_node  *store = get_store();
3888         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
3889
3890         ir_node *end_block = get_irg_end_block(current_ir_graph);
3891         add_immBlock_pred(end_block, ret);
3892
3893         set_cur_block(NULL);
3894 }
3895
3896 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3897 {
3898         if (get_cur_block() == NULL)
3899                 return NULL;
3900
3901         return expression_to_firm(statement->expression);
3902 }
3903
3904 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3905 {
3906         declaration_t *declaration = compound->scope.declarations;
3907         for( ; declaration != NULL; declaration = declaration->next) {
3908                 create_local_declaration(declaration);
3909         }
3910
3911         ir_node     *result    = NULL;
3912         statement_t *statement = compound->statements;
3913         for( ; statement != NULL; statement = statement->base.next) {
3914                 if (statement->base.next == NULL
3915                                 && statement->kind == STATEMENT_EXPRESSION) {
3916                         result = expression_statement_to_firm(
3917                                         &statement->expression);
3918                         break;
3919                 }
3920                 statement_to_firm(statement);
3921         }
3922
3923         return result;
3924 }
3925
3926 static void create_global_variable(declaration_t *declaration)
3927 {
3928         ir_visibility  vis;
3929         ir_type       *var_type;
3930         switch ((storage_class_tag_t)declaration->storage_class) {
3931                 case STORAGE_CLASS_STATIC:
3932                         vis = visibility_local;
3933                         goto global_var;
3934
3935                 case STORAGE_CLASS_EXTERN:
3936                         vis = visibility_external_allocated;
3937                         goto global_var;
3938
3939                 case STORAGE_CLASS_NONE:
3940                         vis = visibility_external_visible;
3941                         goto global_var;
3942
3943                 case STORAGE_CLASS_THREAD:
3944                         vis = visibility_external_visible;
3945                         goto tls_var;
3946
3947                 case STORAGE_CLASS_THREAD_EXTERN:
3948                         vis = visibility_external_allocated;
3949                         goto tls_var;
3950
3951                 case STORAGE_CLASS_THREAD_STATIC:
3952                         vis = visibility_local;
3953                         goto tls_var;
3954
3955 tls_var:
3956                         var_type = get_tls_type();
3957                         goto create_var;
3958
3959 global_var:
3960                         var_type = get_glob_type();
3961                         goto create_var;
3962
3963 create_var:
3964                         create_declaration_entity(declaration,
3965                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
3966                                                   var_type);
3967                         if (!is_type_function(skip_typeref(declaration->type))) {
3968                                 set_entity_visibility(declaration->v.entity, vis);
3969                         }
3970
3971                         return;
3972
3973                 case STORAGE_CLASS_TYPEDEF:
3974                 case STORAGE_CLASS_AUTO:
3975                 case STORAGE_CLASS_REGISTER:
3976                 case STORAGE_CLASS_ENUM_ENTRY:
3977                         break;
3978         }
3979         panic("Invalid storage class for global variable");
3980 }
3981
3982 static void create_local_declaration(declaration_t *declaration)
3983 {
3984         if (declaration->namespc != NAMESPACE_NORMAL)
3985                 return;
3986         /* construct type */
3987         (void) get_ir_type(declaration->type);
3988         if (declaration->symbol == NULL) {
3989                 return;
3990         }
3991
3992         type_t *type = skip_typeref(declaration->type);
3993
3994         switch ((storage_class_tag_t) declaration->storage_class) {
3995         case STORAGE_CLASS_STATIC:
3996                 create_local_static_variable(declaration);
3997                 return;
3998         case STORAGE_CLASS_EXTERN:
3999                 create_global_variable(declaration);
4000                 create_declaration_initializer(declaration);
4001                 return;
4002         case STORAGE_CLASS_NONE:
4003         case STORAGE_CLASS_AUTO:
4004         case STORAGE_CLASS_REGISTER:
4005                 if (is_type_function(type)) {
4006                         if (declaration->init.statement != NULL) {
4007                                 panic("nested functions not supported yet");
4008                         } else {
4009                                 get_function_entity(declaration);
4010                         }
4011                 } else {
4012                         create_local_variable(declaration);
4013                 }
4014                 return;
4015         case STORAGE_CLASS_ENUM_ENTRY:
4016                 /* should already be handled */
4017                 assert(declaration->declaration_kind == DECLARATION_KIND_ENUM_ENTRY);
4018                 return;
4019         case STORAGE_CLASS_TYPEDEF:
4020                 declaration->declaration_kind = DECLARATION_KIND_TYPE;
4021                 return;
4022         case STORAGE_CLASS_THREAD:
4023         case STORAGE_CLASS_THREAD_EXTERN:
4024         case STORAGE_CLASS_THREAD_STATIC:
4025                 break;
4026         }
4027         panic("invalid storage class found");
4028 }
4029
4030 static void initialize_local_declaration(declaration_t *declaration)
4031 {
4032         if (declaration->symbol == NULL || declaration->namespc != NAMESPACE_NORMAL)
4033                 return;
4034
4035         switch ((declaration_kind_t) declaration->declaration_kind) {
4036         case DECLARATION_KIND_LOCAL_VARIABLE:
4037         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4038                 create_declaration_initializer(declaration);
4039                 return;
4040
4041         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4042                 allocate_variable_length_array(declaration);
4043                 return;
4044
4045         case DECLARATION_KIND_LABEL_BLOCK:
4046         case DECLARATION_KIND_COMPOUND_MEMBER:
4047         case DECLARATION_KIND_GLOBAL_VARIABLE:
4048         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
4049         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
4050         case DECLARATION_KIND_FUNCTION:
4051         case DECLARATION_KIND_TYPE:
4052         case DECLARATION_KIND_ENUM_ENTRY:
4053                 return;
4054
4055         case DECLARATION_KIND_UNKNOWN:
4056                 panic("can't initialize unknwon declaration");
4057         }
4058         panic("invalid declaration kind");
4059 }
4060
4061 static void declaration_statement_to_firm(declaration_statement_t *statement)
4062 {
4063         declaration_t *declaration = statement->declarations_begin;
4064         declaration_t *end         = statement->declarations_end->next;
4065         for( ; declaration != end; declaration = declaration->next) {
4066                 if (declaration->namespc != NAMESPACE_NORMAL)
4067                         continue;
4068                 initialize_local_declaration(declaration);
4069         }
4070 }
4071
4072 static void if_statement_to_firm(if_statement_t *statement)
4073 {
4074         ir_node *cur_block = get_cur_block();
4075
4076         ir_node *fallthrough_block = NULL;
4077
4078         /* the true (blocks) */
4079         ir_node *true_block = NULL;
4080         if (statement->true_statement != NULL) {
4081                 true_block = new_immBlock();
4082                 statement_to_firm(statement->true_statement);
4083                 if (get_cur_block() != NULL) {
4084                         ir_node *jmp = new_Jmp();
4085                         if (fallthrough_block == NULL)
4086                                 fallthrough_block = new_immBlock();
4087                         add_immBlock_pred(fallthrough_block, jmp);
4088                 }
4089         }
4090
4091         /* the false (blocks) */
4092         ir_node *false_block = NULL;
4093         if (statement->false_statement != NULL) {
4094                 false_block = new_immBlock();
4095
4096                 statement_to_firm(statement->false_statement);
4097                 if (get_cur_block() != NULL) {
4098                         ir_node *jmp = new_Jmp();
4099                         if (fallthrough_block == NULL)
4100                                 fallthrough_block = new_immBlock();
4101                         add_immBlock_pred(fallthrough_block, jmp);
4102                 }
4103         }
4104
4105         /* create the condition */
4106         if (cur_block != NULL) {
4107                 if (true_block == NULL || false_block == NULL) {
4108                         if (fallthrough_block == NULL)
4109                                 fallthrough_block = new_immBlock();
4110                         if (true_block == NULL)
4111                                 true_block = fallthrough_block;
4112                         if (false_block == NULL)
4113                                 false_block = fallthrough_block;
4114                 }
4115
4116                 set_cur_block(cur_block);
4117                 create_condition_evaluation(statement->condition, true_block,
4118                                             false_block);
4119         }
4120
4121         mature_immBlock(true_block);
4122         if (false_block != fallthrough_block) {
4123                 mature_immBlock(false_block);
4124         }
4125         if (fallthrough_block != NULL) {
4126                 mature_immBlock(fallthrough_block);
4127         }
4128
4129         set_cur_block(fallthrough_block);
4130 }
4131
4132 static void while_statement_to_firm(while_statement_t *statement)
4133 {
4134         ir_node *jmp = NULL;
4135         if (get_cur_block() != NULL) {
4136                 jmp = new_Jmp();
4137         }
4138
4139         /* create the header block */
4140         ir_node *header_block = new_immBlock();
4141         if (jmp != NULL) {
4142                 add_immBlock_pred(header_block, jmp);
4143         }
4144
4145         /* the loop body */
4146         ir_node *old_continue_label = continue_label;
4147         ir_node *old_break_label    = break_label;
4148         continue_label              = header_block;
4149         break_label                 = NULL;
4150
4151         ir_node *body_block = new_immBlock();
4152         statement_to_firm(statement->body);
4153         ir_node *false_block = break_label;
4154
4155         assert(continue_label == header_block);
4156         continue_label = old_continue_label;
4157         break_label    = old_break_label;
4158
4159         if (get_cur_block() != NULL) {
4160                 jmp = new_Jmp();
4161                 add_immBlock_pred(header_block, jmp);
4162         }
4163
4164         /* shortcut for while(true) */
4165         if (is_constant_expression(statement->condition)
4166                         && fold_constant(statement->condition) != 0) {
4167                 set_cur_block(header_block);
4168                 ir_node *header_jmp = new_Jmp();
4169                 add_immBlock_pred(body_block, header_jmp);
4170
4171                 keep_alive(body_block);
4172         } else {
4173                 if (false_block == NULL) {
4174                         false_block = new_immBlock();
4175                 }
4176
4177                 /* create the condition */
4178                 set_cur_block(header_block);
4179
4180                 create_condition_evaluation(statement->condition, body_block,
4181                                             false_block);
4182         }
4183
4184         mature_immBlock(body_block);
4185         mature_immBlock(header_block);
4186         if (false_block != NULL) {
4187                 mature_immBlock(false_block);
4188         }
4189
4190         set_cur_block(false_block);
4191 }
4192
4193 static void do_while_statement_to_firm(do_while_statement_t *statement)
4194 {
4195         ir_node *jmp = NULL;
4196         if (get_cur_block() != NULL) {
4197                 jmp = new_Jmp();
4198         }
4199
4200         /* create the header block */
4201         ir_node *header_block = new_immBlock();
4202
4203         /* the loop body */
4204         ir_node *body_block = new_immBlock();
4205         if (jmp != NULL) {
4206                 add_immBlock_pred(body_block, jmp);
4207         }
4208
4209         ir_node *old_continue_label = continue_label;
4210         ir_node *old_break_label    = break_label;
4211         continue_label              = header_block;
4212         break_label                 = NULL;
4213
4214         statement_to_firm(statement->body);
4215         ir_node *false_block = break_label;
4216
4217         assert(continue_label == header_block);
4218         continue_label = old_continue_label;
4219         break_label    = old_break_label;
4220
4221         if (get_cur_block() != NULL) {
4222                 ir_node *body_jmp = new_Jmp();
4223                 add_immBlock_pred(header_block, body_jmp);
4224                 mature_immBlock(header_block);
4225         }
4226
4227         if (false_block == NULL) {
4228                 false_block = new_immBlock();
4229         }
4230
4231         /* create the condition */
4232         set_cur_block(header_block);
4233
4234         create_condition_evaluation(statement->condition, body_block, false_block);
4235         mature_immBlock(body_block);
4236         mature_immBlock(header_block);
4237         if (false_block != NULL) {
4238                 mature_immBlock(false_block);
4239         }
4240
4241         set_cur_block(false_block);
4242 }
4243
4244 static void for_statement_to_firm(for_statement_t *statement)
4245 {
4246         ir_node *jmp = NULL;
4247
4248         /* create declarations */
4249         declaration_t *declaration = statement->scope.declarations;
4250         for( ; declaration != NULL; declaration = declaration->next) {
4251                 create_local_declaration(declaration);
4252         }
4253         declaration = statement->scope.declarations;
4254         for( ; declaration != NULL; declaration = declaration->next) {
4255                 initialize_local_declaration(declaration);
4256         }
4257
4258         if (get_cur_block() != NULL) {
4259                 if (statement->initialisation != NULL) {
4260                         expression_to_firm(statement->initialisation);
4261                 }
4262
4263                 jmp = new_Jmp();
4264         }
4265
4266
4267         /* create the step block */
4268         ir_node *const step_block = new_immBlock();
4269         if (statement->step != NULL) {
4270                 expression_to_firm(statement->step);
4271         }
4272         ir_node *const step_jmp = new_Jmp();
4273
4274         /* create the header block */
4275         ir_node *const header_block = new_immBlock();
4276         if (jmp != NULL) {
4277                 add_immBlock_pred(header_block, jmp);
4278         }
4279         add_immBlock_pred(header_block, step_jmp);
4280
4281         /* the false block */
4282         ir_node *const false_block = new_immBlock();
4283
4284         /* the loop body */
4285         ir_node * body_block;
4286         if (statement->body != NULL) {
4287                 ir_node *const old_continue_label = continue_label;
4288                 ir_node *const old_break_label    = break_label;
4289                 continue_label = step_block;
4290                 break_label    = false_block;
4291
4292                 body_block = new_immBlock();
4293                 statement_to_firm(statement->body);
4294
4295                 assert(continue_label == step_block);
4296                 assert(break_label    == false_block);
4297                 continue_label = old_continue_label;
4298                 break_label    = old_break_label;
4299
4300                 if (get_cur_block() != NULL) {
4301                         jmp = new_Jmp();
4302                         add_immBlock_pred(step_block, jmp);
4303                 }
4304         } else {
4305                 body_block = step_block;
4306         }
4307
4308         /* create the condition */
4309         set_cur_block(header_block);
4310         if (statement->condition != NULL) {
4311                 create_condition_evaluation(statement->condition, body_block,
4312                                             false_block);
4313         } else {
4314                 keep_alive(header_block);
4315                 jmp = new_Jmp();
4316                 add_immBlock_pred(body_block, jmp);
4317         }
4318
4319         mature_immBlock(body_block);
4320         mature_immBlock(false_block);
4321         mature_immBlock(step_block);
4322         mature_immBlock(header_block);
4323         mature_immBlock(false_block);
4324
4325         set_cur_block(false_block);
4326 }
4327
4328 static void create_jump_statement(const statement_t *statement,
4329                                   ir_node *target_block)
4330 {
4331         if (get_cur_block() == NULL)
4332                 return;
4333
4334         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4335         ir_node  *jump = new_d_Jmp(dbgi);
4336         add_immBlock_pred(target_block, jump);
4337
4338         set_cur_block(NULL);
4339 }
4340
4341 static ir_node *get_break_label(void)
4342 {
4343         if (break_label == NULL) {
4344                 ir_node *cur_block = get_cur_block();
4345                 break_label = new_immBlock();
4346                 set_cur_block(cur_block);
4347         }
4348         return break_label;
4349 }
4350
4351 static void switch_statement_to_firm(const switch_statement_t *statement)
4352 {
4353         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4354
4355         ir_node *expression  = expression_to_firm(statement->expression);
4356         ir_node *cond        = new_d_Cond(dbgi, expression);
4357
4358         set_cur_block(NULL);
4359
4360         ir_node *const old_switch_cond       = current_switch_cond;
4361         ir_node *const old_break_label       = break_label;
4362         const bool     old_saw_default_label = saw_default_label;
4363         saw_default_label                    = false;
4364         current_switch_cond                  = cond;
4365         break_label                          = NULL;
4366
4367         if (statement->body != NULL) {
4368                 statement_to_firm(statement->body);
4369         }
4370
4371         if (get_cur_block() != NULL) {
4372                 ir_node *jmp = new_Jmp();
4373                 add_immBlock_pred(get_break_label(), jmp);
4374         }
4375
4376         if (!saw_default_label) {
4377                 set_cur_block(get_nodes_block(cond));
4378                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4379                                                         MAGIC_DEFAULT_PN_NUMBER);
4380                 add_immBlock_pred(get_break_label(), proj);
4381         }
4382
4383         if (break_label != NULL) {
4384                 mature_immBlock(break_label);
4385         }
4386         set_cur_block(break_label);
4387
4388         assert(current_switch_cond == cond);
4389         current_switch_cond = old_switch_cond;
4390         break_label         = old_break_label;
4391         saw_default_label   = old_saw_default_label;
4392 }
4393
4394 static void case_label_to_firm(const case_label_statement_t *statement)
4395 {
4396         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4397
4398         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4399
4400         /* let's create a node and hope firm constant folding creates a Const
4401          * node... */
4402         ir_node *proj;
4403         ir_node *old_block = get_nodes_block(current_switch_cond);
4404         ir_node *block     = new_immBlock();
4405
4406         set_cur_block(old_block);
4407         if (statement->expression != NULL) {
4408                 long start_pn = fold_constant(statement->expression);
4409                 long end_pn = start_pn;
4410                 if (statement->end_range != NULL) {
4411                         end_pn = fold_constant(statement->end_range);
4412                 }
4413                 assert(start_pn <= end_pn);
4414                 /* create jumps for all cases in the given range */
4415                 for (long pn = start_pn; pn <= end_pn; ++pn) {
4416                         if (pn == MAGIC_DEFAULT_PN_NUMBER) {
4417                                 /* oops someone detected our cheating... */
4418                                 panic("magic default pn used");
4419                         }
4420                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4421                         add_immBlock_pred(block, proj);
4422                 }
4423         } else {
4424                 saw_default_label = true;
4425                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4426                                          MAGIC_DEFAULT_PN_NUMBER);
4427
4428                 add_immBlock_pred(block, proj);
4429         }
4430
4431         if (fallthrough != NULL) {
4432                 add_immBlock_pred(block, fallthrough);
4433         }
4434         mature_immBlock(block);
4435         set_cur_block(block);
4436
4437         if (statement->statement != NULL) {
4438                 statement_to_firm(statement->statement);
4439         }
4440 }
4441
4442 static ir_node *get_label_block(declaration_t *label)
4443 {
4444         assert(label->namespc == NAMESPACE_LABEL);
4445
4446         if (label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
4447                 return label->v.block;
4448         }
4449         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
4450
4451         ir_node *old_cur_block = get_cur_block();
4452         ir_node *block         = new_immBlock();
4453         set_cur_block(old_cur_block);
4454
4455         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
4456         label->v.block          = block;
4457
4458         ARR_APP1(ir_node *, imature_blocks, block);
4459
4460         return block;
4461 }
4462
4463 static void label_to_firm(const label_statement_t *statement)
4464 {
4465         ir_node *block = get_label_block(statement->label);
4466
4467         if (get_cur_block() != NULL) {
4468                 ir_node *jmp = new_Jmp();
4469                 add_immBlock_pred(block, jmp);
4470         }
4471
4472         set_cur_block(block);
4473         keep_alive(block);
4474
4475         if (statement->statement != NULL) {
4476                 statement_to_firm(statement->statement);
4477         }
4478 }
4479
4480 static void goto_to_firm(const goto_statement_t *statement)
4481 {
4482         if (get_cur_block() == NULL)
4483                 return;
4484
4485         ir_node *block = get_label_block(statement->label);
4486         ir_node *jmp   = new_Jmp();
4487         add_immBlock_pred(block, jmp);
4488
4489         set_cur_block(NULL);
4490 }
4491
4492 static void asm_statement_to_firm(const asm_statement_t *statement)
4493 {
4494         bool needs_memory = false;
4495
4496         if (statement->is_volatile) {
4497                 needs_memory = true;
4498         }
4499
4500         size_t         n_clobbers = 0;
4501         asm_clobber_t *clobber    = statement->clobbers;
4502         for( ; clobber != NULL; clobber = clobber->next) {
4503                 const char *clobber_str = clobber->clobber.begin;
4504
4505                 if (!be_is_valid_clobber(clobber_str)) {
4506                         errorf(&statement->base.source_position,
4507                                    "invalid clobber '%s' specified", clobber->clobber);
4508                         continue;
4509                 }
4510
4511                 if (strcmp(clobber_str, "memory") == 0) {
4512                         needs_memory = true;
4513                         continue;
4514                 }
4515
4516                 ident *id = new_id_from_str(clobber_str);
4517                 obstack_ptr_grow(&asm_obst, id);
4518                 ++n_clobbers;
4519         }
4520         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4521         ident **clobbers = NULL;
4522         if (n_clobbers > 0) {
4523                 clobbers = obstack_finish(&asm_obst);
4524         }
4525
4526         size_t n_inputs  = 0;
4527         asm_argument_t *argument = statement->inputs;
4528         for ( ; argument != NULL; argument = argument->next)
4529                 n_inputs++;
4530         size_t n_outputs = 0;
4531         argument = statement->outputs;
4532         for ( ; argument != NULL; argument = argument->next)
4533                 n_outputs++;
4534
4535         unsigned next_pos = 0;
4536
4537         ir_node *ins[n_inputs + n_outputs + 1];
4538         size_t   in_size = 0;
4539
4540         ir_asm_constraint *tmp_in_constraints
4541                 = xmalloc(n_outputs * sizeof(tmp_in_constraints[0]));
4542
4543         const expression_t *out_exprs[n_outputs];
4544         ir_node            *out_addrs[n_outputs];
4545         size_t              out_size = 0;
4546
4547         argument = statement->outputs;
4548         for ( ; argument != NULL; argument = argument->next) {
4549                 const char *constraints = argument->constraints.begin;
4550                 asm_constraint_flags_t asm_flags
4551                         = be_parse_asm_constraints(constraints);
4552
4553                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4554                         errorf(&statement->base.source_position,
4555                                "some constraints in '%s' are not supported", constraints);
4556                         continue;
4557                 }
4558                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4559                         errorf(&statement->base.source_position,
4560                                "some constraints in '%s' are invalid", constraints);
4561                         continue;
4562                 }
4563                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4564                         errorf(&statement->base.source_position,
4565                                "no write flag specified for output constraints '%s'",
4566                                constraints);
4567                         continue;
4568                 }
4569
4570                 unsigned pos = next_pos++;
4571                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4572                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4573                         expression_t *expr = argument->expression;
4574                         ir_node      *addr = expression_to_addr(expr);
4575                         /* in+output, construct an artifical same_as constraint on the
4576                          * input */
4577                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4578                                 char     buf[64];
4579                                 ir_node *value = get_value_from_lvalue(expr, addr);
4580
4581                                 snprintf(buf, sizeof(buf), "%d", pos);
4582
4583                                 ir_asm_constraint constraint;
4584                                 constraint.pos              = pos;
4585                                 constraint.constraint       = new_id_from_str(buf);
4586                                 constraint.mode             = get_ir_mode(expr->base.type);
4587                                 tmp_in_constraints[in_size] = constraint;
4588                                 ins[in_size] = value;
4589
4590                                 ++in_size;
4591                         }
4592
4593                         out_exprs[out_size] = expr;
4594                         out_addrs[out_size] = addr;
4595                         ++out_size;
4596                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4597                         /* pure memory ops need no input (but we have to make sure we
4598                          * attach to the memory) */
4599                         assert(! (asm_flags &
4600                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4601                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4602                         needs_memory = true;
4603
4604                         /* we need to attach the address to the inputs */
4605                         expression_t *expr = argument->expression;
4606
4607                         ir_asm_constraint constraint;
4608                         constraint.pos              = pos;
4609                         constraint.constraint       = new_id_from_str(constraints);
4610                         constraint.mode             = NULL;
4611                         tmp_in_constraints[in_size] = constraint;
4612
4613                         ins[in_size]          = expression_to_addr(expr);
4614                         ++in_size;
4615                         continue;
4616                 } else {
4617                         errorf(&statement->base.source_position,
4618                                "only modifiers but no place set in constraints '%s'",
4619                                constraints);
4620                         continue;
4621                 }
4622
4623                 ir_asm_constraint constraint;
4624                 constraint.pos        = pos;
4625                 constraint.constraint = new_id_from_str(constraints);
4626                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4627
4628                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4629         }
4630         assert(obstack_object_size(&asm_obst)
4631                         == out_size * sizeof(ir_asm_constraint));
4632         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4633
4634
4635         obstack_grow(&asm_obst, tmp_in_constraints,
4636                      in_size * sizeof(tmp_in_constraints[0]));
4637         free(tmp_in_constraints);
4638         /* find and count input and output arguments */
4639         argument = statement->inputs;
4640         for( ; argument != NULL; argument = argument->next) {
4641                 const char *constraints = argument->constraints.begin;
4642                 asm_constraint_flags_t asm_flags
4643                         = be_parse_asm_constraints(constraints);
4644
4645                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4646                         errorf(&statement->base.source_position,
4647                                "some constraints in '%s' are not supported", constraints);
4648                         continue;
4649                 }
4650                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4651                         errorf(&statement->base.source_position,
4652                                "some constraints in '%s' are invalid", constraints);
4653                         continue;
4654                 }
4655                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4656                         errorf(&statement->base.source_position,
4657                                "write flag specified for input constraints '%s'",
4658                                constraints);
4659                         continue;
4660                 }
4661
4662                 ir_node *input;
4663                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4664                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4665                         /* we can treat this as "normal" input */
4666                         input = expression_to_firm(argument->expression);
4667                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4668                         /* pure memory ops need no input (but we have to make sure we
4669                          * attach to the memory) */
4670                         assert(! (asm_flags &
4671                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4672                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4673                         needs_memory = true;
4674                         input = expression_to_addr(argument->expression);
4675                 } else {
4676                         errorf(&statement->base.source_position,
4677                                "only modifiers but no place set in constraints '%s'",
4678                                constraints);
4679                         continue;
4680                 }
4681
4682                 ir_asm_constraint constraint;
4683                 constraint.pos        = next_pos++;
4684                 constraint.constraint = new_id_from_str(constraints);
4685                 constraint.mode       = get_irn_mode(input);
4686
4687                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4688                 ins[in_size++] = input;
4689         }
4690
4691         if (needs_memory) {
4692                 ir_asm_constraint constraint;
4693                 constraint.pos        = next_pos++;
4694                 constraint.constraint = new_id_from_str("");
4695                 constraint.mode       = mode_M;
4696
4697                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4698                 ins[in_size++] = get_store();
4699         }
4700
4701         assert(obstack_object_size(&asm_obst)
4702                         == in_size * sizeof(ir_asm_constraint));
4703         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4704
4705         /* create asm node */
4706         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4707
4708         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4709
4710         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4711                                   out_size, output_constraints,
4712                                   n_clobbers, clobbers, asm_text);
4713
4714         if (statement->is_volatile) {
4715                 set_irn_pinned(node, op_pin_state_pinned);
4716         } else {
4717                 set_irn_pinned(node, op_pin_state_floats);
4718         }
4719
4720         /* create output projs & connect them */
4721         if (needs_memory) {
4722                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4723                 set_store(projm);
4724         }
4725
4726         size_t i;
4727         for (i = 0; i < out_size; ++i) {
4728                 const expression_t *out_expr = out_exprs[i];
4729                 long                pn       = i;
4730                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4731                 ir_node            *proj     = new_Proj(node, mode, pn);
4732                 ir_node            *addr     = out_addrs[i];
4733
4734                 set_value_for_expression_addr(out_expr, proj, addr);
4735         }
4736 }
4737
4738 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4739         statement_to_firm(statement->try_statement);
4740         warningf(&statement->base.source_position, "structured exception handling ignored");
4741 }
4742
4743 static void     leave_statement_to_firm(leave_statement_t *statement) {
4744         errorf(&statement->base.source_position, "__leave not supported yet");
4745 }
4746
4747 /**
4748  * Transform a statement.
4749  */
4750 static void statement_to_firm(statement_t *statement)
4751 {
4752 #ifndef NDEBUG
4753         assert(!statement->base.transformed);
4754         statement->base.transformed = true;
4755 #endif
4756
4757         switch(statement->kind) {
4758         case STATEMENT_INVALID:
4759                 panic("invalid statement found");
4760                 return;
4761         case STATEMENT_EMPTY:
4762                 /* nothing */
4763                 return;
4764         case STATEMENT_COMPOUND:
4765                 compound_statement_to_firm(&statement->compound);
4766                 return;
4767         case STATEMENT_RETURN:
4768                 return_statement_to_firm(&statement->returns);
4769                 return;
4770         case STATEMENT_EXPRESSION:
4771                 expression_statement_to_firm(&statement->expression);
4772                 return;
4773         case STATEMENT_IF:
4774                 if_statement_to_firm(&statement->ifs);
4775                 return;
4776         case STATEMENT_WHILE:
4777                 while_statement_to_firm(&statement->whiles);
4778                 return;
4779         case STATEMENT_DO_WHILE:
4780                 do_while_statement_to_firm(&statement->do_while);
4781                 return;
4782         case STATEMENT_DECLARATION:
4783                 declaration_statement_to_firm(&statement->declaration);
4784                 return;
4785         case STATEMENT_BREAK:
4786                 create_jump_statement(statement, get_break_label());
4787                 return;
4788         case STATEMENT_CONTINUE:
4789                 create_jump_statement(statement, continue_label);
4790                 return;
4791         case STATEMENT_SWITCH:
4792                 switch_statement_to_firm(&statement->switchs);
4793                 return;
4794         case STATEMENT_CASE_LABEL:
4795                 case_label_to_firm(&statement->case_label);
4796                 return;
4797         case STATEMENT_FOR:
4798                 for_statement_to_firm(&statement->fors);
4799                 return;
4800         case STATEMENT_LABEL:
4801                 label_to_firm(&statement->label);
4802                 return;
4803         case STATEMENT_GOTO:
4804                 goto_to_firm(&statement->gotos);
4805                 return;
4806         case STATEMENT_ASM:
4807                 asm_statement_to_firm(&statement->asms);
4808                 return;
4809         case STATEMENT_MS_TRY:
4810                 ms_try_statement_to_firm(&statement->ms_try);
4811                 return;
4812         case STATEMENT_LEAVE:
4813                 leave_statement_to_firm(&statement->leave);
4814                 return;
4815         }
4816         panic("Statement not implemented\n");
4817 }
4818
4819 static int count_decls_in_expression(const expression_t *expression);
4820
4821 static int count_local_declarations(const declaration_t *      decl,
4822                                     const declaration_t *const end)
4823 {
4824         int count = 0;
4825         for (; decl != end; decl = decl->next) {
4826                 if (decl->namespc != NAMESPACE_NORMAL)
4827                         continue;
4828                 type_t *type = skip_typeref(decl->type);
4829
4830                 if (!decl->address_taken && is_type_scalar(type))
4831                         ++count;
4832                 const initializer_t *initializer = decl->init.initializer;
4833                 /* FIXME: should walk initializer hierarchies... */
4834                 if (initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4835                         count += count_decls_in_expression(initializer->value.value);
4836                 }
4837         }
4838         return count;
4839 }
4840
4841 static int count_decls_in_expression(const expression_t *expression) {
4842         int count = 0;
4843
4844         if (expression == NULL)
4845                 return 0;
4846
4847         switch((expression_kind_t) expression->base.kind) {
4848         case EXPR_STATEMENT:
4849                 return count_decls_in_stmts(expression->statement.statement);
4850         EXPR_BINARY_CASES {
4851                 int count_left  = count_decls_in_expression(expression->binary.left);
4852                 int count_right = count_decls_in_expression(expression->binary.right);
4853                 return count_left + count_right;
4854         }
4855         EXPR_UNARY_CASES
4856                 return count_decls_in_expression(expression->unary.value);
4857         case EXPR_CALL: {
4858                 call_argument_t *argument = expression->call.arguments;
4859                 for( ; argument != NULL; argument = argument->next) {
4860                         count += count_decls_in_expression(argument->expression);
4861                 }
4862                 return count;
4863         }
4864
4865         case EXPR_UNKNOWN:
4866         case EXPR_INVALID:
4867                 panic("unexpected expression kind");
4868
4869         case EXPR_COMPOUND_LITERAL:
4870                 /* TODO... */
4871                 break;
4872
4873         case EXPR_CONDITIONAL:
4874                 count += count_decls_in_expression(expression->conditional.condition);
4875                 count += count_decls_in_expression(expression->conditional.true_expression);
4876                 count += count_decls_in_expression(expression->conditional.false_expression);
4877                 return count;
4878
4879         case EXPR_BUILTIN_PREFETCH:
4880                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
4881                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
4882                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
4883                 return count;
4884
4885         case EXPR_BUILTIN_CONSTANT_P:
4886                 count += count_decls_in_expression(expression->builtin_constant.value);
4887                 return count;
4888
4889         case EXPR_SELECT:
4890                 count += count_decls_in_expression(expression->select.compound);
4891                 return count;
4892
4893         case EXPR_ARRAY_ACCESS:
4894                 count += count_decls_in_expression(expression->array_access.array_ref);
4895                 count += count_decls_in_expression(expression->array_access.index);
4896                 return count;
4897
4898         case EXPR_CLASSIFY_TYPE:
4899                 count += count_decls_in_expression(expression->classify_type.type_expression);
4900                 return count;
4901
4902         case EXPR_SIZEOF:
4903         case EXPR_ALIGNOF: {
4904                 expression_t *tp_expression = expression->typeprop.tp_expression;
4905                 if (tp_expression != NULL) {
4906                         count += count_decls_in_expression(tp_expression);
4907                 }
4908                 return count;
4909         }
4910
4911         case EXPR_OFFSETOF:
4912         case EXPR_REFERENCE:
4913         case EXPR_CONST:
4914         case EXPR_CHARACTER_CONSTANT:
4915         case EXPR_WIDE_CHARACTER_CONSTANT:
4916         case EXPR_STRING_LITERAL:
4917         case EXPR_WIDE_STRING_LITERAL:
4918         case EXPR_FUNCNAME:
4919         case EXPR_BUILTIN_SYMBOL:
4920         case EXPR_VA_START:
4921         case EXPR_VA_ARG:
4922                 break;
4923         }
4924
4925         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
4926          * (or implement all the missing expressions here/implement a walker)
4927          */
4928
4929         return 0;
4930 }
4931
4932 static int count_decls_in_stmts(const statement_t *stmt)
4933 {
4934         int count = 0;
4935         for (; stmt != NULL; stmt = stmt->base.next) {
4936                 switch (stmt->kind) {
4937                         case STATEMENT_EMPTY:
4938                                 break;
4939
4940                         case STATEMENT_DECLARATION: {
4941                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
4942                                 count += count_local_declarations(decl_stmt->declarations_begin,
4943                                                                   decl_stmt->declarations_end->next);
4944                                 break;
4945                         }
4946
4947                         case STATEMENT_COMPOUND: {
4948                                 const compound_statement_t *const comp =
4949                                         &stmt->compound;
4950                                 count += count_decls_in_stmts(comp->statements);
4951                                 break;
4952                         }
4953
4954                         case STATEMENT_IF: {
4955                                 const if_statement_t *const if_stmt = &stmt->ifs;
4956                                 count += count_decls_in_expression(if_stmt->condition);
4957                                 count += count_decls_in_stmts(if_stmt->true_statement);
4958                                 count += count_decls_in_stmts(if_stmt->false_statement);
4959                                 break;
4960                         }
4961
4962                         case STATEMENT_SWITCH: {
4963                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
4964                                 count += count_decls_in_expression(switch_stmt->expression);
4965                                 count += count_decls_in_stmts(switch_stmt->body);
4966                                 break;
4967                         }
4968
4969                         case STATEMENT_LABEL: {
4970                                 const label_statement_t *const label_stmt = &stmt->label;
4971                                 if (label_stmt->statement != NULL) {
4972                                         count += count_decls_in_stmts(label_stmt->statement);
4973                                 }
4974                                 break;
4975                         }
4976
4977                         case STATEMENT_WHILE: {
4978                                 const while_statement_t *const while_stmt = &stmt->whiles;
4979                                 count += count_decls_in_expression(while_stmt->condition);
4980                                 count += count_decls_in_stmts(while_stmt->body);
4981                                 break;
4982                         }
4983
4984                         case STATEMENT_DO_WHILE: {
4985                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
4986                                 count += count_decls_in_expression(do_while_stmt->condition);
4987                                 count += count_decls_in_stmts(do_while_stmt->body);
4988                                 break;
4989                         }
4990
4991                         case STATEMENT_FOR: {
4992                                 const for_statement_t *const for_stmt = &stmt->fors;
4993                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
4994                                 count += count_decls_in_expression(for_stmt->initialisation);
4995                                 count += count_decls_in_expression(for_stmt->condition);
4996                                 count += count_decls_in_expression(for_stmt->step);
4997                                 count += count_decls_in_stmts(for_stmt->body);
4998                                 break;
4999                         }
5000
5001                         case STATEMENT_CASE_LABEL: {
5002                                 const case_label_statement_t *label = &stmt->case_label;
5003                                 count += count_decls_in_expression(label->expression);
5004                                 if (label->statement != NULL) {
5005                                         count += count_decls_in_stmts(label->statement);
5006                                 }
5007                                 break;
5008                         }
5009
5010                         case STATEMENT_ASM:
5011                         case STATEMENT_BREAK:
5012                         case STATEMENT_CONTINUE:
5013                                 break;
5014
5015                         case STATEMENT_EXPRESSION: {
5016                                 const expression_statement_t *expr_stmt = &stmt->expression;
5017                                 count += count_decls_in_expression(expr_stmt->expression);
5018                                 break;
5019                         }
5020
5021                         case STATEMENT_GOTO:
5022                         case STATEMENT_LEAVE:
5023                         case STATEMENT_INVALID:
5024                                 break;
5025
5026                         case STATEMENT_RETURN: {
5027                                 const return_statement_t *ret_stmt = &stmt->returns;
5028                                 count += count_decls_in_expression(ret_stmt->value);
5029                                 break;
5030                         }
5031
5032                         case STATEMENT_MS_TRY: {
5033                                 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
5034                                 count += count_decls_in_stmts(try_stmt->try_statement);
5035                                 if (try_stmt->except_expression != NULL)
5036                                         count += count_decls_in_expression(try_stmt->except_expression);
5037                                 count += count_decls_in_stmts(try_stmt->final_statement);
5038                                 break;
5039                         }
5040                 }
5041         }
5042         return count;
5043 }
5044
5045 static int get_function_n_local_vars(declaration_t *declaration)
5046 {
5047         int count = 0;
5048
5049         /* count parameters */
5050         count += count_local_declarations(declaration->scope.declarations, NULL);
5051
5052         /* count local variables declared in body */
5053         count += count_decls_in_stmts(declaration->init.statement);
5054
5055         return count;
5056 }
5057
5058 static void initialize_function_parameters(declaration_t *declaration)
5059 {
5060         ir_graph        *irg             = current_ir_graph;
5061         ir_node         *args            = get_irg_args(irg);
5062         ir_node         *start_block     = get_irg_start_block(irg);
5063         ir_type         *function_irtype = get_ir_type(declaration->type);
5064
5065         int            n         = 0;
5066         declaration_t *parameter = declaration->scope.declarations;
5067         for( ; parameter != NULL; parameter = parameter->next, ++n) {
5068                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
5069                 type_t *type = skip_typeref(parameter->type);
5070
5071                 bool needs_entity = parameter->address_taken;
5072                 assert(!is_type_array(type));
5073                 if (is_type_compound(type)) {
5074                         needs_entity = true;
5075                 }
5076
5077                 if (needs_entity) {
5078                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5079                         ident     *id     = new_id_from_str(parameter->symbol->string);
5080                         set_entity_ident(entity, id);
5081
5082                         parameter->declaration_kind
5083                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5084                         parameter->v.entity = entity;
5085                         continue;
5086                 }
5087
5088                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5089                 ir_mode *param_mode   = get_type_mode(param_irtype);
5090
5091                 long     pn    = n;
5092                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5093
5094                 ir_mode *mode = get_ir_mode(type);
5095                 value = create_conv(NULL, value, mode);
5096                 value = do_strict_conv(NULL, value);
5097
5098                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
5099                 parameter->v.value_number   = next_value_number_function;
5100                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
5101                 ++next_value_number_function;
5102
5103                 set_value(parameter->v.value_number, value);
5104         }
5105 }
5106
5107 /**
5108  * Handle additional decl modifiers for IR-graphs
5109  *
5110  * @param irg            the IR-graph
5111  * @param dec_modifiers  additional modifiers
5112  */
5113 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5114 {
5115         if (decl_modifiers & DM_NORETURN) {
5116                 /* TRUE if the declaration includes the Microsoft
5117                    __declspec(noreturn) specifier. */
5118                 set_irg_additional_property(irg, mtp_property_noreturn);
5119         }
5120         if (decl_modifiers & DM_NOTHROW) {
5121                 /* TRUE if the declaration includes the Microsoft
5122                    __declspec(nothrow) specifier. */
5123                 set_irg_additional_property(irg, mtp_property_nothrow);
5124         }
5125         if (decl_modifiers & DM_NAKED) {
5126                 /* TRUE if the declaration includes the Microsoft
5127                    __declspec(naked) specifier. */
5128                 set_irg_additional_property(irg, mtp_property_naked);
5129         }
5130         if (decl_modifiers & DM_FORCEINLINE) {
5131                 /* TRUE if the declaration includes the
5132                    Microsoft __forceinline specifier. */
5133                 set_irg_inline_property(irg, irg_inline_forced);
5134         }
5135         if (decl_modifiers & DM_NOINLINE) {
5136                 /* TRUE if the declaration includes the Microsoft
5137                    __declspec(noinline) specifier. */
5138                 set_irg_inline_property(irg, irg_inline_forbidden);
5139         }
5140 }
5141
5142 static void add_function_pointer(ir_type *segment, ir_entity *method,
5143                                  const char *unique_template)
5144 {
5145         ir_type   *method_type  = get_entity_type(method);
5146         ident     *id           = id_unique(unique_template);
5147         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5148
5149         ident     *ide          = id_unique(unique_template);
5150         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5151         ir_graph  *irg          = get_const_code_irg();
5152         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5153                                                            method, NULL);
5154
5155         set_entity_compiler_generated(ptr, 1);
5156         set_entity_variability(ptr, variability_constant);
5157         set_atomic_ent_value(ptr, val);
5158 }
5159
5160 /**
5161  * Create code for a function.
5162  */
5163 static void create_function(declaration_t *declaration)
5164 {
5165         ir_entity *function_entity = get_function_entity(declaration);
5166
5167         if (declaration->init.statement == NULL)
5168                 return;
5169
5170         if (declaration->modifiers & DM_CONSTRUCTOR) {
5171                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5172                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5173         }
5174         if (declaration->modifiers & DM_DESTRUCTOR) {
5175                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5176                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5177         }
5178
5179         current_function_decl = declaration;
5180         current_function_name = NULL;
5181         current_funcsig       = NULL;
5182
5183         assert(imature_blocks == NULL);
5184         imature_blocks = NEW_ARR_F(ir_node*, 0);
5185
5186         int       n_local_vars = get_function_n_local_vars(declaration);
5187         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5188
5189         set_irg_fp_model(irg, firm_opt.fp_model);
5190         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5191         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5192
5193         ir_node *first_block = get_cur_block();
5194
5195         /* set inline flags */
5196         if (declaration->is_inline)
5197                 set_irg_inline_property(irg, irg_inline_recomended);
5198         handle_decl_modifier_irg(irg, declaration->modifiers);
5199
5200         next_value_number_function = 0;
5201         initialize_function_parameters(declaration);
5202
5203         statement_to_firm(declaration->init.statement);
5204
5205         ir_node *end_block = get_irg_end_block(irg);
5206
5207         /* do we have a return statement yet? */
5208         if (get_cur_block() != NULL) {
5209                 type_t *type = skip_typeref(declaration->type);
5210                 assert(is_type_function(type));
5211                 const function_type_t *func_type   = &type->function;
5212                 const type_t          *return_type
5213                         = skip_typeref(func_type->return_type);
5214
5215                 ir_node *ret;
5216                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5217                         ret = new_Return(get_store(), 0, NULL);
5218                 } else {
5219                         ir_mode *mode;
5220                         if (is_type_scalar(return_type)) {
5221                                 mode = get_ir_mode(func_type->return_type);
5222                         } else {
5223                                 mode = mode_P_data;
5224                         }
5225
5226                         ir_node *in[1];
5227                         /* §5.1.2.2.3 main implicitly returns 0 */
5228                         if (strcmp(declaration->symbol->string, "main") == 0) {
5229                                 in[0] = new_Const(mode, get_mode_null(mode));
5230                         } else {
5231                                 in[0] = new_Unknown(mode);
5232                                 if (warning.return_type) {
5233                                         warningf(&declaration->source_position,
5234                                                 "missing return statement at end of non-void function '%Y'",
5235                                                 declaration->symbol);
5236                                 }
5237                         }
5238                         ret = new_Return(get_store(), 1, in);
5239                 }
5240                 add_immBlock_pred(end_block, ret);
5241         }
5242
5243         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
5244                 mature_immBlock(imature_blocks[i]);
5245         }
5246         DEL_ARR_F(imature_blocks);
5247         imature_blocks = NULL;
5248
5249         mature_immBlock(first_block);
5250         mature_immBlock(end_block);
5251
5252         irg_finalize_cons(irg);
5253
5254         /* finalize the frame type */
5255         ir_type *frame_type = get_irg_frame_type(irg);
5256         int      n          = get_compound_n_members(frame_type);
5257         int      align_all  = 4;
5258         int      offset     = 0;
5259         for(int i = 0; i < n; ++i) {
5260                 ir_entity *entity      = get_compound_member(frame_type, i);
5261                 ir_type   *entity_type = get_entity_type(entity);
5262
5263                 int align = get_type_alignment_bytes(entity_type);
5264                 if (align > align_all)
5265                         align_all = align;
5266                 int misalign = 0;
5267                 if (align > 0) {
5268                         misalign  = offset % align;
5269                         if (misalign > 0) {
5270                                 offset += align - misalign;
5271                         }
5272                 }
5273
5274                 set_entity_offset(entity, offset);
5275                 offset += get_type_size_bytes(entity_type);
5276         }
5277         set_type_size_bytes(frame_type, offset);
5278         set_type_alignment_bytes(frame_type, align_all);
5279
5280         irg_vrfy(irg);
5281 }
5282
5283 static void scope_to_firm(scope_t *scope)
5284 {
5285         /* first pass: create declarations */
5286         declaration_t *declaration = scope->declarations;
5287         for( ; declaration != NULL; declaration = declaration->next) {
5288                 if (declaration->namespc != NAMESPACE_NORMAL)
5289                         continue;
5290                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5291                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5292                         continue;
5293                 if (declaration->symbol == NULL)
5294                         continue;
5295
5296                 type_t *type = skip_typeref(declaration->type);
5297                 if (is_type_function(type)) {
5298                         get_function_entity(declaration);
5299                 } else {
5300                         create_global_variable(declaration);
5301                 }
5302         }
5303
5304         /* second pass: create code/initializers */
5305         declaration = scope->declarations;
5306         for( ; declaration != NULL; declaration = declaration->next) {
5307                 if (declaration->namespc != NAMESPACE_NORMAL)
5308                         continue;
5309                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5310                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5311                         continue;
5312                 if (declaration->symbol == NULL)
5313                         continue;
5314
5315                 type_t *type = declaration->type;
5316                 if (type->kind == TYPE_FUNCTION) {
5317                         create_function(declaration);
5318                 } else {
5319                         assert(declaration->declaration_kind
5320                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5321                         current_ir_graph = get_const_code_irg();
5322                         create_declaration_initializer(declaration);
5323                 }
5324         }
5325 }
5326
5327 void init_ast2firm(void)
5328 {
5329         obstack_init(&asm_obst);
5330         init_atomic_modes();
5331
5332         id_underscore = new_id_from_chars("_", 1);
5333         id_imp        = new_id_from_chars("__imp_", 6);
5334
5335         /* OS option must be set to the backend */
5336         const char *s = "ia32-gasmode=linux";
5337         switch (firm_opt.os_support) {
5338         case OS_SUPPORT_MINGW:
5339                 create_ld_ident = create_ld_ident_win32;
5340                 s = "ia32-gasmode=mingw";
5341                 break;
5342         case OS_SUPPORT_LINUX:
5343                 create_ld_ident = create_ld_ident_linux_elf;
5344                 s = "ia32-gasmode=elf";
5345                 break;
5346         case OS_SUPPORT_MACHO:
5347                 create_ld_ident = create_ld_ident_macho;
5348                 s = "ia32-gasmode=macho";
5349                 break;
5350         }
5351         int res = firm_be_option(s);
5352         (void) res;
5353         assert(res);
5354
5355         /* create idents for all known runtime functions */
5356         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5357                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5358         }
5359
5360         entitymap_init(&entitymap);
5361 }
5362
5363 static void init_ir_types(void)
5364 {
5365         static int ir_types_initialized = 0;
5366         if (ir_types_initialized)
5367                 return;
5368         ir_types_initialized = 1;
5369
5370         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
5371         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
5372         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
5373
5374         ir_type_int        = get_ir_type(type_int);
5375         ir_type_const_char = get_ir_type(type_const_char);
5376         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5377         ir_type_void       = get_ir_type(type_void);
5378 }
5379
5380 void exit_ast2firm(void)
5381 {
5382         entitymap_destroy(&entitymap);
5383         obstack_free(&asm_obst, NULL);
5384 }
5385
5386 void translation_unit_to_firm(translation_unit_t *unit)
5387 {
5388         /* just to be sure */
5389         continue_label      = NULL;
5390         break_label         = NULL;
5391         current_switch_cond = NULL;
5392
5393         init_ir_types();
5394
5395         scope_to_firm(&unit->scope);
5396 }