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