nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <stdbool.h>
  25
  26 #include <libfirm/firm.h>
  27 #include <libfirm/adt/obst.h>
  28 #include <libfirm/be.h>
  29
  30 #include "ast2firm.h"
  31
  32 #include "adt/error.h"
  33 #include "adt/array.h"
  34 #include "symbol_t.h"
  35 #include "token_t.h"
  36 #include "type_t.h"
  37 #include "ast_t.h"
  38 #include "parser.h"
  39 #include "diagnostic.h"
  40 #include "lang_features.h"
  41 #include "types.h"
  42 #include "warning.h"
  43 #include "entitymap_t.h"
  44 #include "driver/firm_opt.h"
  45 #include "driver/firm_cmdline.h"
  46
  47 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  48
  49 /* some idents needed for name mangling */
  50 static ident *id_underscore;
  51 static ident *id_imp;
  52
  53 static ir_type *ir_type_const_char;
  54 static ir_type *ir_type_wchar_t;
  55 static ir_type *ir_type_void;
  56 static ir_type *ir_type_int;
  57
  58 static type_t *type_const_char;
  59
  60 static int       next_value_number_function;
  61 static ir_node  *continue_label;
  62 static ir_node  *break_label;
  63 static ir_node  *current_switch_cond;
  64 static bool      saw_default_label;
  65 static ir_node **imature_blocks;
  66 static bool constant_folding;
  67
  68 static const declaration_t *current_function_decl;
  69 static ir_node             *current_function_name;
  70 static ir_node             *current_funcsig;
  71
  72 static entitymap_t  entitymap;
  73
  74 static struct obstack asm_obst;
  75
  76 typedef enum declaration_kind_t {
  77         DECLARATION_KIND_UNKNOWN,
  78         DECLARATION_KIND_FUNCTION,
  79         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  80         DECLARATION_KIND_GLOBAL_VARIABLE,
  81         DECLARATION_KIND_LOCAL_VARIABLE,
  82         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  83         DECLARATION_KIND_COMPOUND_MEMBER,
  84         DECLARATION_KIND_LABEL_BLOCK,
  85         DECLARATION_KIND_ENUM_ENTRY,
  86         DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE,
  87         DECLARATION_KIND_COMPOUND_TYPE_COMPLETE,
  88         DECLARATION_KIND_TYPE
  89 } declaration_kind_t;
  90
  91 static ir_type *get_ir_type(type_t *type);
  92 static ir_type *get_ir_type_incomplete(type_t *type);
  93 static int count_decls_in_stmts(const statement_t *stmt);
  94
  95 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  96 {
  97         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  98
  99         warningf(&declaration->source_position,
 100                  "variable '%#T' might be used uninitialized",
 101                  declaration->type, declaration->symbol);
 102         return new_r_Unknown(irg, mode);
 103 }
 104
 105 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 106 {
 107         const source_position_t *pos = (const source_position_t*) dbg;
 108         if (pos == NULL)
 109                 return 0;
 110         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 111                                    pos->linenr);
 112 }
 113
 114 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 115 {
 116         const source_position_t *pos = (const source_position_t*) dbg;
 117         if (pos == NULL)
 118                 return NULL;
 119         if (line != NULL)
 120                 *line = pos->linenr;
 121         return pos->input_name;
 122 }
 123
 124 static dbg_info *get_dbg_info(const source_position_t *pos)
 125 {
 126         return (dbg_info*) pos;
 127 }
 128
 129 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 130
 131 static ir_mode *mode_int, *mode_uint;
 132
 133 static ir_node *_expression_to_firm(const expression_t *expression);
 134 static ir_node *expression_to_firm(const expression_t *expression);
 135 static inline ir_mode *get_ir_mode(type_t *type);
 136 static void create_local_declaration(declaration_t *declaration);
 137
 138 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 139 {
 140         unsigned flags = get_atomic_type_flags(kind);
 141         unsigned size  = get_atomic_type_size(kind);
 142         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 143                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 144                 char            name[64];
 145                 ir_mode_sort    sort;
 146                 unsigned        bit_size     = size * 8;
 147                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 148                 ir_mode_arithmetic arithmetic;
 149                 unsigned        modulo_shift;
 150
 151                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 152                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 153                         snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
 154                         sort         = irms_int_number;
 155                         arithmetic   = irma_twos_complement;
 156                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 157                 } else {
 158                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 159                         snprintf(name, sizeof(name), "f%d", bit_size);
 160                         sort         = irms_float_number;
 161                         arithmetic   = irma_ieee754;
 162                         modulo_shift = 0;
 163                 }
 164                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 165                                    modulo_shift);
 166         }
 167
 168         return NULL;
 169 }
 170
 171 /**
 172  * Initialises the atomic modes depending on the machine size.
 173  */
 174 static void init_atomic_modes(void)
 175 {
 176         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 177                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 178         }
 179         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 180         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 181
 182         /* there's no real void type in firm */
 183         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 184
 185         /* initialize pointer modes */
 186         char            name[64];
 187         ir_mode_sort    sort         = irms_reference;
 188         unsigned        bit_size     = machine_size;
 189         bool            is_signed    = 0;
 190         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 191         unsigned        modulo_shift
 192                 = bit_size < machine_size ? machine_size : bit_size;
 193
 194         snprintf(name, sizeof(name), "p%d", machine_size);
 195         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 196                                         modulo_shift);
 197
 198         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 199         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 200
 201         /* Hmm, pointers should be machine size */
 202         set_modeP_data(ptr_mode);
 203         set_modeP_code(ptr_mode);
 204 }
 205
 206 static unsigned get_compound_type_size(compound_type_t *type)
 207 {
 208         ir_type *irtype = get_ir_type((type_t*) type);
 209         return get_type_size_bytes(irtype);
 210 }
 211
 212 static unsigned get_array_type_size(array_type_t *type)
 213 {
 214         assert(!type->is_vla);
 215         ir_type *irtype = get_ir_type((type_t*) type);
 216         return get_type_size_bytes(irtype);
 217 }
 218
 219
 220 static unsigned get_type_size_const(type_t *type)
 221 {
 222         switch(type->kind) {
 223         case TYPE_ERROR:
 224                 panic("error type occurred");
 225         case TYPE_ATOMIC:
 226                 return get_atomic_type_size(type->atomic.akind);
 227         case TYPE_COMPLEX:
 228                 return 2 * get_atomic_type_size(type->complex.akind);
 229         case TYPE_IMAGINARY:
 230                 return get_atomic_type_size(type->imaginary.akind);
 231         case TYPE_ENUM:
 232                 return get_mode_size_bytes(mode_int);
 233         case TYPE_COMPOUND_UNION:
 234         case TYPE_COMPOUND_STRUCT:
 235                 return get_compound_type_size(&type->compound);
 236         case TYPE_FUNCTION:
 237                 /* just a pointer to the function */
 238                 return get_mode_size_bytes(mode_P_code);
 239         case TYPE_POINTER:
 240                 return get_mode_size_bytes(mode_P_data);
 241         case TYPE_ARRAY:
 242                 return get_array_type_size(&type->array);
 243         case TYPE_BUILTIN:
 244                 return get_type_size_const(type->builtin.real_type);
 245         case TYPE_BITFIELD:
 246                 panic("type size of bitfield request");
 247         case TYPE_TYPEDEF:
 248         case TYPE_TYPEOF:
 249         case TYPE_INVALID:
 250                 break;
 251         }
 252         panic("Trying to determine size of invalid type");
 253 }
 254
 255 static ir_node *get_type_size(type_t *type)
 256 {
 257         type = skip_typeref(type);
 258
 259         if (is_type_array(type) && type->array.is_vla) {
 260                 ir_node *size_node = type->array.size_node;
 261                 if (size_node == NULL) {
 262                         size_node = expression_to_firm(type->array.size_expression);
 263                         assert(!is_Const(size_node));
 264                         type->array.size_node = size_node;
 265                 }
 266
 267                 ir_node *elem_size = get_type_size(type->array.element_type);
 268                 ir_mode *mode      = get_irn_mode(size_node);
 269                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 270                 return real_size;
 271         }
 272
 273         ir_mode *mode = get_ir_mode(type_size_t);
 274         symconst_symbol sym;
 275         sym.type_p = get_ir_type(type);
 276         return new_SymConst(mode, sym, symconst_type_size);
 277 }
 278
 279 static unsigned count_parameters(const function_type_t *function_type)
 280 {
 281         unsigned count = 0;
 282
 283         function_parameter_t *parameter = function_type->parameters;
 284         for ( ; parameter != NULL; parameter = parameter->next) {
 285                 ++count;
 286         }
 287
 288         return count;
 289 }
 290
 291 /**
 292  * Creates a Firm type for an atomic type
 293  */
 294 static ir_type *create_atomic_type(const atomic_type_t *type)
 295 {
 296         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 297         atomic_type_kind_t  kind      = type->akind;
 298         ir_mode            *mode      = _atomic_modes[kind];
 299         ident              *id        = get_mode_ident(mode);
 300         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 301
 302         set_type_alignment_bytes(irtype, type->base.alignment);
 303
 304         return irtype;
 305 }
 306
 307 /**
 308  * Creates a Firm type for a complex type
 309  */
 310 static ir_type *create_complex_type(const complex_type_t *type)
 311 {
 312         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 313         atomic_type_kind_t  kind      = type->akind;
 314         ir_mode            *mode      = _atomic_modes[kind];
 315         ident              *id        = get_mode_ident(mode);
 316
 317         (void) id;
 318         (void) dbgi;
 319
 320         /* FIXME: finish the array */
 321         return NULL;
 322 }
 323
 324 /**
 325  * Creates a Firm type for an imaginary type
 326  */
 327 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 328 {
 329         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 330         atomic_type_kind_t  kind      = type->akind;
 331         ir_mode            *mode      = _atomic_modes[kind];
 332         ident              *id        = get_mode_ident(mode);
 333         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 334
 335         set_type_alignment_bytes(irtype, type->base.alignment);
 336
 337         return irtype;
 338 }
 339
 340 /**
 341  * return type of a parameter (and take transparent union gnu extension into
 342  * account)
 343  */
 344 static type_t *get_parameter_type(type_t *type)
 345 {
 346         type = skip_typeref(type);
 347         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 348                 declaration_t *decl = type->compound.declaration;
 349                 type                = decl->scope.declarations->type;
 350         }
 351
 352         return type;
 353 }
 354
 355 static ir_type *create_method_type(const function_type_t *function_type)
 356 {
 357         type_t  *return_type  = function_type->return_type;
 358
 359         ident   *id           = id_unique("functiontype.%u");
 360         int      n_parameters = count_parameters(function_type);
 361         int      n_results    = return_type == type_void ? 0 : 1;
 362         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 363         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 364
 365         if (return_type != type_void) {
 366                 ir_type *restype = get_ir_type(return_type);
 367                 set_method_res_type(irtype, 0, restype);
 368         }
 369
 370         function_parameter_t *parameter = function_type->parameters;
 371         int                   n         = 0;
 372         for ( ; parameter != NULL; parameter = parameter->next) {
 373                 type_t  *type     = get_parameter_type(parameter->type);
 374                 ir_type *p_irtype = get_ir_type(type);
 375                 set_method_param_type(irtype, n, p_irtype);
 376                 ++n;
 377         }
 378
 379         if (function_type->variadic || function_type->unspecified_parameters) {
 380                 set_method_variadicity(irtype, variadicity_variadic);
 381         }
 382
 383         return irtype;
 384 }
 385
 386 static ir_type *create_pointer_type(pointer_type_t *type)
 387 {
 388         type_t   *points_to    = type->points_to;
 389         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 390         dbg_info *dbgi         = get_dbg_info(&type->base.source_position);
 391         ir_type  *ir_type      = new_d_type_pointer(id_unique("pointer.%u"),
 392                                                     ir_points_to, mode_P_data, dbgi);
 393
 394         return ir_type;
 395 }
 396
 397 static ir_type *create_array_type(array_type_t *type)
 398 {
 399         type_t  *element_type    = type->element_type;
 400         ir_type *ir_element_type = get_ir_type(element_type);
 401
 402         ident    *id      = id_unique("array.%u");
 403         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 404         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 405
 406         const int align = get_type_alignment_bytes(ir_element_type);
 407         set_type_alignment_bytes(ir_type, align);
 408
 409         if (type->size_constant) {
 410                 int n_elements = type->size;
 411
 412                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 413
 414                 size_t elemsize = get_type_size_bytes(ir_element_type);
 415                 if (elemsize % align > 0) {
 416                         elemsize += align - (elemsize % align);
 417                 }
 418                 set_type_size_bytes(ir_type, n_elements * elemsize);
 419         } else {
 420                 set_array_lower_bound_int(ir_type, 0, 0);
 421         }
 422         set_type_state(ir_type, layout_fixed);
 423
 424         return ir_type;
 425 }
 426
 427 /**
 428  * Return the signed integer type of size bits.
 429  *
 430  * @param size   the size
 431  */
 432 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 433                                                  unsigned size)
 434 {
 435         static ir_mode *s_modes[64 + 1] = {NULL, };
 436         ir_type *res;
 437         ir_mode *mode;
 438
 439         if (size <= 0 || size > 64)
 440                 return NULL;
 441
 442         mode = s_modes[size];
 443         if (mode == NULL) {
 444                 char name[32];
 445
 446                 snprintf(name, sizeof(name), "bf_I%u", size);
 447                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 448                                    size <= 32 ? 32 : size );
 449                 s_modes[size] = mode;
 450         }
 451
 452         char name[32];
 453         snprintf(name, sizeof(name), "I%u", size);
 454         ident *id = new_id_from_str(name);
 455         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 456         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 457         set_primitive_base_type(res, base_tp);
 458
 459         return res;
 460 }
 461
 462 /**
 463  * Return the unsigned integer type of size bits.
 464  *
 465  * @param size   the size
 466  */
 467 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 468                                                    unsigned size)
 469 {
 470         static ir_mode *u_modes[64 + 1] = {NULL, };
 471         ir_type *res;
 472         ir_mode *mode;
 473
 474         if (size <= 0 || size > 64)
 475                 return NULL;
 476
 477         mode = u_modes[size];
 478         if (mode == NULL) {
 479                 char name[32];
 480
 481                 snprintf(name, sizeof(name), "bf_U%u", size);
 482                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 483                                    size <= 32 ? 32 : size );
 484                 u_modes[size] = mode;
 485         }
 486
 487         char name[32];
 488
 489         snprintf(name, sizeof(name), "U%u", size);
 490         ident *id = new_id_from_str(name);
 491         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 492         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 493         set_primitive_base_type(res, base_tp);
 494
 495         return res;
 496 }
 497
 498 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 499 {
 500         type_t *base = skip_typeref(type->base_type);
 501         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 502         ir_type *irbase = get_ir_type(base);
 503
 504         unsigned size = fold_constant(type->size);
 505
 506         assert(!is_type_float(base));
 507         if (is_type_signed(base)) {
 508                 return get_signed_int_type_for_bit_size(irbase, size);
 509         } else {
 510                 return get_unsigned_int_type_for_bit_size(irbase, size);
 511         }
 512 }
 513
 514 #define INVALID_TYPE ((ir_type_ptr)-1)
 515
 516 enum {
 517         COMPOUND_IS_STRUCT = false,
 518         COMPOUND_IS_UNION  = true
 519 };
 520
 521 /**
 522  * Construct firm type from ast struct type.
 523  *
 524  * As anonymous inner structs get flattened to a single firm type, we might get
 525  * irtype, outer_offset and out_align passed (they represent the position of
 526  * the anonymous inner struct inside the resulting firm struct)
 527  */
 528 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 529                                      size_t *outer_offset, size_t *outer_align,
 530                                      bool incomplete, bool is_union)
 531 {
 532         declaration_t      *declaration = type->declaration;
 533         declaration_kind_t  kind        = (declaration_kind_t)declaration->declaration_kind;
 534
 535         if (kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
 536                         || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE
 537                                 && incomplete))
 538                 return declaration->v.irtype;
 539
 540         size_t align_all  = 1;
 541         size_t offset     = 0;
 542         size_t bit_offset = 0;
 543         size_t size       = 0;
 544
 545         if (irtype == NULL) {
 546                 symbol_t *symbol = declaration->symbol;
 547                 ident    *id;
 548                 if (symbol != NULL) {
 549                         id = new_id_from_str(symbol->string);
 550                 } else {
 551                         if (is_union) {
 552                                 id = id_unique("__anonymous_union.%u");
 553                         } else {
 554                                 id = id_unique("__anonymous_struct.%u");
 555                         }
 556                 }
 557                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 558
 559                 if (is_union) {
 560                         irtype = new_d_type_union(id, dbgi);
 561                 } else {
 562                         irtype = new_d_type_struct(id, dbgi);
 563                 }
 564
 565                 declaration->declaration_kind
 566                         = DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE;
 567                 declaration->v.irtype         = irtype;
 568                 //type->base.firm_type          = irtype;
 569         } else {
 570                 offset    = *outer_offset;
 571                 align_all = *outer_align;
 572         }
 573
 574         if (incomplete)
 575                 return irtype;
 576
 577         declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE;
 578
 579         declaration_t *entry = declaration->scope.declarations;
 580         for( ; entry != NULL; entry = entry->next) {
 581                 if (entry->namespc != NAMESPACE_NORMAL)
 582                         continue;
 583
 584                 size_t prev_offset = offset;
 585
 586                 symbol_t *symbol     = entry->symbol;
 587                 type_t   *entry_type = skip_typeref(entry->type);
 588                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 589
 590                 ident    *ident;
 591                 if (symbol != NULL) {
 592                         ident = new_id_from_str(symbol->string);
 593                 } else {
 594                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 595                                 create_compound_type(&entry_type->compound, irtype, &offset,
 596                                                      &align_all, false, COMPOUND_IS_STRUCT);
 597                                 goto finished_member;
 598                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 599                                 create_compound_type(&entry_type->compound, irtype, &offset,
 600                                                      &align_all, false, COMPOUND_IS_UNION);
 601                                 goto finished_member;
 602                         } else {
 603                                 assert(entry_type->kind == TYPE_BITFIELD);
 604                         }
 605                         ident = id_unique("anon.%u");
 606                 }
 607
 608                 ir_type *base_irtype;
 609                 if (entry_type->kind == TYPE_BITFIELD) {
 610                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 611                 } else {
 612                         base_irtype = get_ir_type(entry_type);
 613                 }
 614
 615                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 616                 size_t misalign        = offset % entry_alignment;
 617
 618                 ir_type   *entry_irtype = get_ir_type(entry_type);
 619                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 620
 621                 size_t base;
 622                 size_t bits_remainder;
 623                 if (entry_type->kind == TYPE_BITFIELD) {
 624                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 625                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 626
 627                         if (size_bits > rest_size_bits) {
 628                                 /* start a new bucket */
 629                                 offset     += entry_alignment - misalign;
 630                                 bit_offset  = 0;
 631
 632                                 base           = offset;
 633                                 bits_remainder = 0;
 634                         } else {
 635                                 /* put into current bucket */
 636                                 base           = offset - misalign;
 637                                 bits_remainder = misalign * 8 + bit_offset;
 638                         }
 639
 640                         offset     += size_bits / 8;
 641                         bit_offset  = bit_offset + (size_bits % 8);
 642                 } else {
 643                         size_t entry_size = get_type_size_bytes(base_irtype);
 644                         if (misalign > 0 || bit_offset > 0)
 645                                 offset += entry_alignment - misalign;
 646
 647                         base           = offset;
 648                         bits_remainder = 0;
 649                         offset        += entry_size;
 650                         bit_offset     = 0;
 651                 }
 652
 653                 if (entry_alignment > align_all) {
 654                         if (entry_alignment % align_all != 0) {
 655                                 panic("uneven alignments not supported yet");
 656                         }
 657                         align_all = entry_alignment;
 658                 }
 659
 660                 set_entity_offset(entity, base);
 661                 set_entity_offset_bits_remainder(entity,
 662                                                  (unsigned char) bits_remainder);
 663                 //add_struct_member(irtype, entity);
 664                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 665                 assert(entry->v.entity == NULL);
 666                 entry->v.entity         = entity;
 667
 668 finished_member:
 669                 if (is_union) {
 670                         size_t entry_size = offset - prev_offset;
 671                         if (entry_size > size) {
 672                                 size = entry_size;
 673                         }
 674                         offset     = 0;
 675                         bit_offset = 0;
 676                 }
 677         }
 678
 679         if (!is_union) {
 680                 size = offset;
 681         }
 682
 683         size_t misalign = offset % align_all;
 684         if (misalign > 0 || bit_offset > 0) {
 685                 size += align_all - misalign;
 686         }
 687
 688         if (outer_offset != NULL) {
 689                 if (!is_union) {
 690                         *outer_offset = offset;
 691                 } else {
 692                         *outer_offset += size;
 693                 }
 694
 695                 if (align_all > *outer_align) {
 696                         if (align_all % *outer_align != 0) {
 697                                 panic("uneven alignments not supported yet");
 698                         }
 699                         *outer_align = align_all;
 700                 }
 701         } else {
 702                 set_type_alignment_bytes(irtype, align_all);
 703                 set_type_size_bytes(irtype, size);
 704                 set_type_state(irtype, layout_fixed);
 705         }
 706
 707         return irtype;
 708 }
 709
 710 static ir_type *create_enum_type(enum_type_t *const type)
 711 {
 712         type->base.firm_type = ir_type_int;
 713
 714         ir_mode *const mode    = mode_int;
 715         tarval  *const one     = get_mode_one(mode);
 716         tarval  *      tv_next = get_tarval_null(mode);
 717
 718         bool constant_folding_old = constant_folding;
 719         constant_folding = true;
 720
 721         declaration_t *declaration = type->declaration->next;
 722         for (; declaration != NULL; declaration = declaration->next) {
 723                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 724                         break;
 725
 726                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 727
 728                 expression_t *const init = declaration->init.enum_value;
 729                 if (init != NULL) {
 730                         ir_node *const cnst = expression_to_firm(init);
 731                         if (!is_Const(cnst)) {
 732                                 panic("couldn't fold constant");
 733                         }
 734                         tv_next = get_Const_tarval(cnst);
 735                 }
 736                 declaration->v.enum_val = tv_next;
 737                 tv_next = tarval_add(tv_next, one);
 738         }
 739
 740         constant_folding = constant_folding_old;
 741
 742         return ir_type_int;
 743 }
 744
 745 static ir_type *get_ir_type_incomplete(type_t *type)
 746 {
 747         assert(type != NULL);
 748         type = skip_typeref(type);
 749
 750         if (type->base.firm_type != NULL) {
 751                 assert(type->base.firm_type != INVALID_TYPE);
 752                 return type->base.firm_type;
 753         }
 754
 755         switch (type->kind) {
 756         case TYPE_COMPOUND_STRUCT:
 757                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 758                                             true, COMPOUND_IS_STRUCT);
 759         case TYPE_COMPOUND_UNION:
 760                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 761                                             true, COMPOUND_IS_UNION);
 762         default:
 763                 return get_ir_type(type);
 764         }
 765 }
 766
 767 static ir_type *get_ir_type(type_t *type)
 768 {
 769         assert(type != NULL);
 770
 771         type = skip_typeref(type);
 772
 773         if (type->base.firm_type != NULL) {
 774                 assert(type->base.firm_type != INVALID_TYPE);
 775                 return type->base.firm_type;
 776         }
 777
 778         ir_type *firm_type = NULL;
 779         switch (type->kind) {
 780         case TYPE_ERROR:
 781                 panic("error type occurred");
 782         case TYPE_ATOMIC:
 783                 firm_type = create_atomic_type(&type->atomic);
 784                 break;
 785         case TYPE_COMPLEX:
 786                 firm_type = create_complex_type(&type->complex);
 787                 break;
 788         case TYPE_IMAGINARY:
 789                 firm_type = create_imaginary_type(&type->imaginary);
 790                 break;
 791         case TYPE_FUNCTION:
 792                 firm_type = create_method_type(&type->function);
 793                 break;
 794         case TYPE_POINTER:
 795                 firm_type = create_pointer_type(&type->pointer);
 796                 break;
 797         case TYPE_ARRAY:
 798                 firm_type = create_array_type(&type->array);
 799                 break;
 800         case TYPE_COMPOUND_STRUCT:
 801                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 802                                                  false, COMPOUND_IS_STRUCT);
 803                 break;
 804         case TYPE_COMPOUND_UNION:
 805                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 806                                                  false, COMPOUND_IS_UNION);
 807                 break;
 808         case TYPE_ENUM:
 809                 firm_type = create_enum_type(&type->enumt);
 810                 break;
 811         case TYPE_BUILTIN:
 812                 firm_type = get_ir_type(type->builtin.real_type);
 813                 break;
 814         case TYPE_BITFIELD:
 815                 firm_type = create_bitfield_type(&type->bitfield);
 816                 break;
 817
 818         case TYPE_TYPEOF:
 819         case TYPE_TYPEDEF:
 820         case TYPE_INVALID:
 821                 break;
 822         }
 823         if (firm_type == NULL)
 824                 panic("unknown type found");
 825
 826         type->base.firm_type = firm_type;
 827         return firm_type;
 828 }
 829
 830 static inline ir_mode *get_ir_mode(type_t *type)
 831 {
 832         ir_type *irtype = get_ir_type(type);
 833
 834         /* firm doesn't report a mode for arrays somehow... */
 835         if (is_Array_type(irtype)) {
 836                 return mode_P_data;
 837         }
 838
 839         ir_mode *mode = get_type_mode(irtype);
 840         assert(mode != NULL);
 841         return mode;
 842 }
 843
 844 /** Names of the runtime functions. */
 845 static const struct {
 846         int        id;           /**< the rts id */
 847         int        n_res;        /**< number of return values */
 848         const char *name;        /**< the name of the rts function */
 849         int        n_params;     /**< number of parameters */
 850         unsigned   flags;        /**< language flags */
 851 } rts_data[] = {
 852         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 853         { rts_abort,      0, "abort",        0, _C89 },
 854         { rts_alloca,     1, "alloca",       1, _ALL },
 855         { rts_abs,        1, "abs",          1, _C89 },
 856         { rts_labs,       1, "labs",         1, _C89 },
 857         { rts_llabs,      1, "llabs",        1, _C99 },
 858         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 859
 860         { rts_fabs,       1, "fabs",         1, _C89 },
 861         { rts_sqrt,       1, "sqrt",         1, _C89 },
 862         { rts_cbrt,       1, "cbrt",         1, _C99 },
 863         { rts_exp,        1, "exp",          1, _C89 },
 864         { rts_exp2,       1, "exp2",         1, _C89 },
 865         { rts_exp10,      1, "exp10",        1, _GNUC },
 866         { rts_log,        1, "log",          1, _C89 },
 867         { rts_log2,       1, "log2",         1, _C89 },
 868         { rts_log10,      1, "log10",        1, _C89 },
 869         { rts_pow,        1, "pow",          2, _C89 },
 870         { rts_sin,        1, "sin",          1, _C89 },
 871         { rts_cos,        1, "cos",          1, _C89 },
 872         { rts_tan,        1, "tan",          1, _C89 },
 873         { rts_asin,       1, "asin",         1, _C89 },
 874         { rts_acos,       1, "acos",         1, _C89 },
 875         { rts_atan,       1, "atan",         1, _C89 },
 876         { rts_sinh,       1, "sinh",         1, _C89 },
 877         { rts_cosh,       1, "cosh",         1, _C89 },
 878         { rts_tanh,       1, "tanh",         1, _C89 },
 879
 880         { rts_fabsf,      1, "fabsf",        1, _C99 },
 881         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 882         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 883         { rts_expf,       1, "expf",         1, _C99 },
 884         { rts_exp2f,      1, "exp2f",        1, _C99 },
 885         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 886         { rts_logf,       1, "logf",         1, _C99 },
 887         { rts_log2f,      1, "log2f",        1, _C99 },
 888         { rts_log10f,     1, "log10f",       1, _C99 },
 889         { rts_powf,       1, "powf",         2, _C99 },
 890         { rts_sinf,       1, "sinf",         1, _C99 },
 891         { rts_cosf,       1, "cosf",         1, _C99 },
 892         { rts_tanf,       1, "tanf",         1, _C99 },
 893         { rts_asinf,      1, "asinf",        1, _C99 },
 894         { rts_acosf,      1, "acosf",        1, _C99 },
 895         { rts_atanf,      1, "atanf",        1, _C99 },
 896         { rts_sinhf,      1, "sinhf",        1, _C99 },
 897         { rts_coshf,      1, "coshf",        1, _C99 },
 898         { rts_tanhf,      1, "tanhf",        1, _C99 },
 899
 900         { rts_fabsl,      1, "fabsl",        1, _C99 },
 901         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 902         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 903         { rts_expl,       1, "expl",         1, _C99 },
 904         { rts_exp2l,      1, "exp2l",        1, _C99 },
 905         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 906         { rts_logl,       1, "logl",         1, _C99 },
 907         { rts_log2l,      1, "log2l",        1, _C99 },
 908         { rts_log10l,     1, "log10l",       1, _C99 },
 909         { rts_powl,       1, "powl",         2, _C99 },
 910         { rts_sinl,       1, "sinl",         1, _C99 },
 911         { rts_cosl,       1, "cosl",         1, _C99 },
 912         { rts_tanl,       1, "tanl",         1, _C99 },
 913         { rts_asinl,      1, "asinl",        1, _C99 },
 914         { rts_acosl,      1, "acosl",        1, _C99 },
 915         { rts_atanl,      1, "atanl",        1, _C99 },
 916         { rts_sinhl,      1, "sinhl",        1, _C99 },
 917         { rts_coshl,      1, "coshl",        1, _C99 },
 918         { rts_tanhl,      1, "tanhl",        1, _C99 },
 919
 920         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 921         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 922         { rts_strcmp,     1, "strcmp",       2, _C89 },
 923         { rts_strncmp,    1, "strncmp",      3, _C89 }
 924 };
 925
 926 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 927
 928 /**
 929  * Mangles an entity linker (ld) name for win32 usage.
 930  *
 931  * @param ent          the entity to be mangled
 932  * @param declaration  the declaration
 933  */
 934 static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration)
 935 {
 936         ident *id;
 937
 938         if (is_Method_type(get_entity_type(ent)))
 939                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 940         else {
 941                 /* always add an underscore in win32 */
 942                 id = mangle(id_underscore, get_entity_ident(ent));
 943         }
 944
 945         decl_modifiers_t decl_modifiers = declaration->modifiers;
 946         if (decl_modifiers & DM_DLLIMPORT) {
 947                 /* add prefix for imported symbols */
 948                 id = mangle(id_imp, id);
 949         }
 950         return id;
 951 }
 952
 953 /**
 954  * Mangles an entity linker (ld) name for Linux ELF usage.
 955  *
 956  * @param ent          the entity to be mangled
 957  * @param declaration  the declaration
 958  */
 959 static ident *create_ld_ident_linux_elf(ir_entity *entity,
 960                                         declaration_t *declaration)
 961 {
 962         (void) declaration;
 963         return get_entity_ident(entity);
 964 }
 965
 966 /**
 967  * Mangles an entity linker (ld) name for Mach-O usage.
 968  *
 969  * @param ent          the entity to be mangled
 970  * @param declaration  the declaration
 971  */
 972 static ident *create_ld_ident_macho(ir_entity *ent, declaration_t *declaration)
 973 {
 974         (void) declaration;
 975         ident *id = mangle(id_underscore, get_entity_ident(ent));
 976         return id;
 977 }
 978
 979 typedef ident* (*create_ld_ident_func)(ir_entity *entity,
 980                                        declaration_t *declaration);
 981 create_ld_ident_func  create_ld_ident = create_ld_ident_linux_elf;
 982
 983 /**
 984  * Handle GNU attributes for entities
 985  *
 986  * @param ent   the entity
 987  * @param decl  the routine declaration
 988  */
 989 static void handle_gnu_attributes_ent(ir_entity *ent, declaration_t *decl)
 990 {
 991         if (decl->modifiers & DM_PURE) {
 992                 /* TRUE if the declaration includes the GNU
 993                    __attribute__((pure)) specifier. */
 994                 set_entity_additional_property(ent, mtp_property_pure);
 995         }
 996         if (decl->modifiers & DM_USED) {
 997                 /* TRUE if the declaration includes the GNU
 998                    __attribute__((used)) specifier. */
 999                 set_entity_stickyness(ent, stickyness_sticky);
1000         }
1001 }
1002
1003 /**
1004  * Creates an entity representing a function.
1005  *
1006  * @param declaration  the function declaration
1007  */
1008 static ir_entity *get_function_entity(declaration_t *declaration)
1009 {
1010         if (declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
1011                 return declaration->v.entity;
1012         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
1013
1014         symbol_t *symbol = declaration->symbol;
1015         ident    *id     = new_id_from_str(symbol->string);
1016
1017         ir_type  *global_type    = get_glob_type();
1018         ir_type  *ir_type_method = get_ir_type(declaration->type);
1019         assert(is_Method_type(ir_type_method));
1020
1021         if (declaration->modifiers & DM_CDECL) {
1022                 set_method_calling_convention(ir_type_method, cc_fixed | cc_cdecl_set);
1023         } else if (declaration->modifiers & DM_FASTCALL) {
1024                 set_method_calling_convention(ir_type_method, cc_fixed | cc_fastcall_set);
1025         } else if (declaration->modifiers & DM_STDCALL) {
1026                 set_method_calling_convention(ir_type_method, cc_fixed | cc_stdcall_set);
1027         }
1028
1029         /* already an entity defined? */
1030         ir_entity *entity = entitymap_get(&entitymap, symbol);
1031         if (entity != NULL) {
1032                 if (get_entity_visibility(entity) == visibility_external_allocated
1033                                 && declaration->init.statement != NULL) {
1034                         set_entity_visibility(entity, visibility_external_visible);
1035                 }
1036                 goto entity_created;
1037         }
1038
1039         dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
1040         entity               = new_d_entity(global_type, id, ir_type_method, dbgi);
1041         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
1042
1043         handle_gnu_attributes_ent(entity, declaration);
1044
1045         /* static inline             => local
1046          * extern inline             => local
1047          * inline without definition => local
1048          * inline with definition    => external_visible */
1049         storage_class_tag_t const storage_class = declaration->storage_class;
1050         bool                const is_inline     = declaration->is_inline;
1051         bool                const has_body      = declaration->init.statement != NULL;
1052         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1053                 set_entity_visibility(entity, visibility_external_visible);
1054         } else if (storage_class == STORAGE_CLASS_STATIC ||
1055                    (is_inline && has_body)) {
1056                 if (!has_body) {
1057                         /* this entity was declared, but is defined nowhere */
1058                         set_entity_peculiarity(entity, peculiarity_description);
1059                 }
1060                 set_entity_visibility(entity, visibility_local);
1061         } else if (has_body) {
1062                 set_entity_visibility(entity, visibility_external_visible);
1063         } else {
1064                 set_entity_visibility(entity, visibility_external_allocated);
1065         }
1066         set_entity_allocation(entity, allocation_static);
1067
1068         /* We should check for file scope here, but as long as we compile C only
1069            this is not needed. */
1070         if (! firm_opt.freestanding) {
1071                 /* check for a known runtime function */
1072                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1073                         if (id != rts_idents[i])
1074                                 continue;
1075
1076                         /* ignore those rts functions not necessary needed for current mode */
1077                         if ((c_mode & rts_data[i].flags) == 0)
1078                                 continue;
1079                         assert(rts_entities[rts_data[i].id] == NULL);
1080                         rts_entities[rts_data[i].id] = entity;
1081                 }
1082         }
1083
1084         entitymap_insert(&entitymap, symbol, entity);
1085
1086 entity_created:
1087         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1088         declaration->v.entity         = entity;
1089
1090         return entity;
1091 }
1092
1093 /**
1094  * Creates a Const node representing a constant.
1095  */
1096 static ir_node *const_to_firm(const const_expression_t *cnst)
1097 {
1098         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1099         ir_mode  *mode = get_ir_mode(cnst->base.type);
1100
1101         char    buf[128];
1102         tarval *tv;
1103         size_t  len;
1104         if (mode_is_float(mode)) {
1105                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1106         } else {
1107                 if (mode_is_signed(mode)) {
1108                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1109                 } else {
1110                         len = snprintf(buf, sizeof(buf), "%llu",
1111                                        (unsigned long long) cnst->v.int_value);
1112                 }
1113                 tv = new_tarval_from_str(buf, len, mode);
1114         }
1115
1116         return new_d_Const(dbgi, mode, tv);
1117 }
1118
1119 /**
1120  * Creates a Const node representing a character constant.
1121  */
1122 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1123 {
1124         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1125         ir_mode  *mode = get_ir_mode(cnst->base.type);
1126
1127         long long int v = 0;
1128         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1129                 if (char_is_signed) {
1130                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1131                 } else {
1132                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1133                 }
1134         }
1135         char    buf[128];
1136         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1137         tarval *tv = new_tarval_from_str(buf, len, mode);
1138
1139         return new_d_Const(dbgi, mode, tv);
1140 }
1141
1142 /**
1143  * Creates a Const node representing a wide character constant.
1144  */
1145 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1146 {
1147         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1148         ir_mode  *mode = get_ir_mode(cnst->base.type);
1149
1150         long long int v = cnst->v.wide_character.begin[0];
1151
1152         char    buf[128];
1153         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1154         tarval *tv = new_tarval_from_str(buf, len, mode);
1155
1156         return new_d_Const(dbgi, mode, tv);
1157 }
1158
1159 /**
1160  * Creates a SymConst for a given entity.
1161  *
1162  * @param dbgi    debug info
1163  * @param mode    the (reference) mode for the SymConst
1164  * @param entity  the entity
1165  */
1166 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1167                               ir_entity *entity)
1168 {
1169         assert(entity != NULL);
1170         union symconst_symbol sym;
1171         sym.entity_p = entity;
1172         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1173 }
1174
1175 /**
1176  * Creates a SymConst node representing a string constant.
1177  *
1178  * @param src_pos    the source position of the string constant
1179  * @param id_prefix  a prefix for the name of the generated string constant
1180  * @param value      the value of the string constant
1181  */
1182 static ir_node *string_to_firm(const source_position_t *const src_pos,
1183                                const char *const id_prefix,
1184                                const string_t *const value)
1185 {
1186         ir_type  *const global_type = get_glob_type();
1187         dbg_info *const dbgi        = get_dbg_info(src_pos);
1188         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1189                                                        ir_type_const_char, dbgi);
1190
1191         ident     *const id     = id_unique(id_prefix);
1192         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1193         set_entity_ld_ident(entity, id);
1194         set_entity_variability(entity, variability_constant);
1195         set_entity_allocation(entity, allocation_static);
1196
1197         ir_type *const elem_type = ir_type_const_char;
1198         ir_mode *const mode      = get_type_mode(elem_type);
1199
1200         const char* const string = value->begin;
1201         const size_t      slen   = 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 /**
1220  * Creates a SymConst node representing a string literal.
1221  *
1222  * @param literal   the string literal
1223  */
1224 static ir_node *string_literal_to_firm(
1225                 const string_literal_expression_t* literal)
1226 {
1227         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1228                               &literal->value);
1229 }
1230
1231 /**
1232  * Creates a SymConst node representing a wide string literal.
1233  *
1234  * @param literal   the wide string literal
1235  */
1236 static ir_node *wide_string_literal_to_firm(
1237         const wide_string_literal_expression_t* const literal)
1238 {
1239         ir_type *const global_type = get_glob_type();
1240         ir_type *const elem_type   = ir_type_wchar_t;
1241         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1242         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1243                                                     elem_type, dbgi);
1244
1245         ident     *const id     = id_unique("Lstr.%u");
1246         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1247         set_entity_ld_ident(entity, id);
1248         set_entity_variability(entity, variability_constant);
1249         set_entity_allocation(entity, allocation_static);
1250
1251         ir_mode *const mode      = get_type_mode(elem_type);
1252
1253         const wchar_rep_t *const string = literal->value.begin;
1254         const size_t             slen   = literal->value.size;
1255
1256         set_array_lower_bound_int(type, 0, 0);
1257         set_array_upper_bound_int(type, 0, slen);
1258         set_type_size_bytes(type, slen);
1259         set_type_state(type, layout_fixed);
1260
1261         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1262         for(size_t i = 0; i < slen; ++i) {
1263                 tvs[i] = new_tarval_from_long(string[i], mode);
1264         }
1265
1266         set_array_entity_values(entity, tvs, slen);
1267         free(tvs);
1268
1269         return create_symconst(dbgi, mode_P_data, entity);
1270 }
1271
1272 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1273                                       ir_node *const addr)
1274 {
1275         ir_type *irtype = get_ir_type(type);
1276         if (is_compound_type(irtype)
1277                         || is_Method_type(irtype)
1278                         || is_Array_type(irtype)) {
1279                 return addr;
1280         }
1281
1282         ir_mode *const mode     = get_type_mode(irtype);
1283         ir_node *const memory   = get_store();
1284         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1285         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1286         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1287
1288         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1289                 set_Load_volatility(load, volatility_is_volatile);
1290         }
1291
1292         set_store(load_mem);
1293         return load_res;
1294 }
1295
1296 /**
1297  * Creates a strict Conv if neccessary.
1298  */
1299 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1300 {
1301         ir_mode *mode = get_irn_mode(node);
1302
1303         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1304                 return node;
1305         if (!mode_is_float(mode))
1306                 return node;
1307
1308         /* check if there is already a Conv */
1309         if (is_Conv(node)) {
1310                 /* convert it into a strict Conv */
1311                 set_Conv_strict(node, 1);
1312                 return node;
1313         }
1314
1315         /* otherwise create a new one */
1316         return new_d_strictConv(dbgi, node, mode);
1317 }
1318
1319 static ir_node *get_global_var_address(dbg_info *const dbgi,
1320                                        const declaration_t *const decl)
1321 {
1322         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1323
1324         ir_entity *const entity = decl->v.entity;
1325         switch ((storage_class_tag_t)decl->storage_class) {
1326                 case STORAGE_CLASS_THREAD:
1327                 case STORAGE_CLASS_THREAD_EXTERN:
1328                 case STORAGE_CLASS_THREAD_STATIC: {
1329                         ir_node *const no_mem = new_NoMem();
1330                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1331                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1332                 }
1333
1334                 default:
1335                         return create_symconst(dbgi, mode_P_data, entity);
1336         }
1337 }
1338
1339 /**
1340  * Returns the correct base address depending on whether it is a parameter or a
1341  * normal local variable.
1342  */
1343 static ir_node *get_local_frame(ir_entity *const ent)
1344 {
1345         ir_graph      *const irg   = current_ir_graph;
1346         const ir_type *const owner = get_entity_owner(ent);
1347         if (owner == get_irg_frame_type(irg)) {
1348                 return get_irg_frame(irg);
1349         } else {
1350                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1351                 return get_irg_value_param_base(irg);
1352         }
1353 }
1354
1355 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1356 {
1357         ir_mode *value_mode = get_irn_mode(value);
1358
1359         if (value_mode == dest_mode || is_Bad(value))
1360                 return value;
1361
1362         if (dest_mode == mode_b) {
1363                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1364                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1365                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1366                 return proj;
1367         }
1368
1369         return new_d_Conv(dbgi, value, dest_mode);
1370 }
1371
1372 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1373 {
1374         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1375         declaration_t *declaration = ref->declaration;
1376         type_t        *type        = skip_typeref(declaration->type);
1377
1378         /* make sure the type is constructed */
1379         (void) get_ir_type(type);
1380
1381         switch((declaration_kind_t) declaration->declaration_kind) {
1382         case DECLARATION_KIND_TYPE:
1383         case DECLARATION_KIND_UNKNOWN:
1384                 break;
1385
1386         case DECLARATION_KIND_ENUM_ENTRY: {
1387                 ir_mode *const mode = get_ir_mode(type);
1388                 return new_Const(mode, declaration->v.enum_val);
1389         }
1390
1391         case DECLARATION_KIND_LOCAL_VARIABLE: {
1392                 ir_mode *const mode = get_ir_mode(type);
1393                 return get_value(declaration->v.value_number, mode);
1394         }
1395         case DECLARATION_KIND_FUNCTION: {
1396                 ir_mode *const mode = get_ir_mode(type);
1397                 return create_symconst(dbgi, mode, declaration->v.entity);
1398         }
1399         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1400                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1401                 return deref_address(dbgi, declaration->type, addr);
1402         }
1403
1404         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1405                 ir_entity *entity = declaration->v.entity;
1406                 ir_node   *frame  = get_local_frame(entity);
1407                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1408                 return deref_address(dbgi, declaration->type, sel);
1409         }
1410
1411         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1412                 return declaration->v.vla_base;
1413
1414         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1415         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1416         case DECLARATION_KIND_COMPOUND_MEMBER:
1417         case DECLARATION_KIND_LABEL_BLOCK:
1418                 panic("not implemented reference type");
1419         }
1420
1421         panic("reference to declaration with unknown type found");
1422 }
1423
1424 static ir_node *reference_addr(const reference_expression_t *ref)
1425 {
1426         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1427         declaration_t *declaration = ref->declaration;
1428
1429         switch((declaration_kind_t) declaration->declaration_kind) {
1430         case DECLARATION_KIND_TYPE:
1431         case DECLARATION_KIND_UNKNOWN:
1432                 break;
1433         case DECLARATION_KIND_LOCAL_VARIABLE:
1434                 /* you can store to a local variable (so we don't panic but return NULL
1435                  * as an indicator for no real address) */
1436                 return NULL;
1437         case DECLARATION_KIND_FUNCTION: {
1438                 type_t *const  type = skip_typeref(ref->base.type);
1439                 ir_mode *const mode = get_ir_mode(type);
1440                 return create_symconst(dbgi, mode, declaration->v.entity);
1441         }
1442         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1443                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1444                 return addr;
1445         }
1446         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1447                 ir_entity *entity = declaration->v.entity;
1448                 ir_node   *frame  = get_local_frame(entity);
1449                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1450
1451                 return sel;
1452         }
1453
1454         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1455                 return declaration->v.vla_base;
1456
1457         case DECLARATION_KIND_ENUM_ENTRY:
1458                 panic("trying to reference enum entry");
1459
1460         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1461         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1462         case DECLARATION_KIND_COMPOUND_MEMBER:
1463         case DECLARATION_KIND_LABEL_BLOCK:
1464                 panic("not implemented reference type");
1465         }
1466
1467         panic("reference to declaration with unknown type found");
1468 }
1469
1470 /**
1471  * Transform calls to builtin functions.
1472  */
1473 static ir_node *process_builtin_call(const call_expression_t *call)
1474 {
1475         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1476
1477         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1478         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1479
1480         type_t *type = skip_typeref(builtin->base.type);
1481         assert(is_type_pointer(type));
1482
1483         type_t   *function_type = skip_typeref(type->pointer.points_to);
1484         symbol_t *symbol        = builtin->symbol;
1485
1486         switch(symbol->ID) {
1487         case T___builtin_alloca: {
1488                 if (call->arguments == NULL || call->arguments->next != NULL) {
1489                         panic("invalid number of parameters on __builtin_alloca");
1490                 }
1491                 expression_t *argument = call->arguments->expression;
1492                 ir_node      *size     = expression_to_firm(argument);
1493
1494                 ir_node *store  = get_store();
1495                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1496                                               stack_alloc);
1497                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1498                 set_store(proj_m);
1499                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1500
1501                 return res;
1502         }
1503         case T___builtin_huge_val: {
1504                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1505                 tarval  *tv   = get_mode_infinite(mode);
1506                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1507                 return   res;
1508         }
1509         case T___builtin_nan:
1510         case T___builtin_nanf:
1511         case T___builtin_nand: {
1512                 /* Ignore string for now... */
1513                 assert(is_type_function(function_type));
1514                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1515                 tarval  *tv   = get_mode_NAN(mode);
1516                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1517                 return res;
1518         }
1519         case T___builtin_va_end:
1520                 return NULL;
1521         default:
1522                 panic("Unsupported builtin found\n");
1523         }
1524 }
1525
1526 /**
1527  * Transform a call expression.
1528  * Handles some special cases, like alloca() calls, which must be resolved
1529  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1530  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1531  * handled right...
1532  */
1533 static ir_node *call_expression_to_firm(const call_expression_t *call)
1534 {
1535         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1536         assert(get_cur_block() != NULL);
1537
1538         expression_t *function = call->function;
1539         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1540                 return process_builtin_call(call);
1541         }
1542         if (function->kind == EXPR_REFERENCE) {
1543                 const reference_expression_t *ref = &function->reference;
1544                 declaration_t *declaration = ref->declaration;
1545
1546                 if ((declaration_kind_t)declaration->declaration_kind == DECLARATION_KIND_FUNCTION) {
1547                         if (declaration->v.entity == rts_entities[rts_alloca]) {
1548                                 /* handle alloca() call */
1549                                 expression_t *argument = call->arguments->expression;
1550                                 ir_node      *size     = expression_to_firm(argument);
1551
1552                                 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1553
1554                                 ir_node *store  = get_store();
1555                                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1556                                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1557                                               stack_alloc);
1558                                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1559                                 set_store(proj_m);
1560                                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1561
1562                                 return res;
1563                         }
1564                 }
1565         }
1566         ir_node *callee = expression_to_firm(function);
1567
1568         type_t *type = skip_typeref(function->base.type);
1569         assert(is_type_pointer(type));
1570         pointer_type_t *pointer_type = &type->pointer;
1571         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1572         assert(is_type_function(points_to));
1573         function_type_t *function_type = &points_to->function;
1574
1575         int      n_parameters = 0;
1576         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1577         ir_type *new_method_type = NULL;
1578         if (function_type->variadic || function_type->unspecified_parameters) {
1579                 const call_argument_t *argument = call->arguments;
1580                 for( ; argument != NULL; argument = argument->next) {
1581                         ++n_parameters;
1582                 }
1583
1584                 /* we need to construct a new method type matching the call
1585                  * arguments... */
1586                 int n_res       = get_method_n_ress(ir_method_type);
1587                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1588                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1589                                                     n_parameters, n_res, dbgi);
1590                 set_method_calling_convention(new_method_type,
1591                                get_method_calling_convention(ir_method_type));
1592                 set_method_additional_properties(new_method_type,
1593                                get_method_additional_properties(ir_method_type));
1594                 set_method_variadicity(new_method_type,
1595                                        get_method_variadicity(ir_method_type));
1596
1597                 for(int i = 0; i < n_res; ++i) {
1598                         set_method_res_type(new_method_type, i,
1599                                             get_method_res_type(ir_method_type, i));
1600                 }
1601                 argument = call->arguments;
1602                 for(int i = 0; i < n_parameters; ++i, argument = argument->next) {
1603                         expression_t *expression = argument->expression;
1604                         ir_type      *irtype     = get_ir_type(expression->base.type);
1605                         set_method_param_type(new_method_type, i, irtype);
1606                 }
1607                 ir_method_type = new_method_type;
1608         } else {
1609                 n_parameters = get_method_n_params(ir_method_type);
1610         }
1611
1612         ir_node *in[n_parameters];
1613
1614         const call_argument_t *argument = call->arguments;
1615         for(int n = 0; n < n_parameters; ++n) {
1616                 expression_t *expression = argument->expression;
1617                 ir_node      *arg_node   = expression_to_firm(expression);
1618
1619                 arg_node = do_strict_conv(dbgi, arg_node);
1620
1621                 in[n] = arg_node;
1622
1623                 argument = argument->next;
1624         }
1625
1626         ir_node  *store = get_store();
1627         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1628                                      ir_method_type);
1629         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1630         set_store(mem);
1631
1632         type_t  *return_type = skip_typeref(function_type->return_type);
1633         ir_node *result      = NULL;
1634
1635         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1636                 ir_mode *mode;
1637                 if (is_type_scalar(return_type)) {
1638                         mode = get_ir_mode(return_type);
1639                 } else {
1640                         mode = mode_P_data;
1641                 }
1642                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1643                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1644         }
1645
1646         return result;
1647 }
1648
1649 static void statement_to_firm(statement_t *statement);
1650 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1651
1652 static ir_node *expression_to_addr(const expression_t *expression);
1653 static void create_condition_evaluation(const expression_t *expression,
1654                                         ir_node *true_block,
1655                                         ir_node *false_block);
1656
1657 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1658                          ir_node *value)
1659 {
1660         value = do_strict_conv(dbgi, value);
1661
1662         ir_node *memory = get_store();
1663
1664         if (is_type_scalar(type)) {
1665                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1666                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1667                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1668                         set_Store_volatility(store, volatility_is_volatile);
1669                 set_store(store_mem);
1670         } else {
1671                 ir_type *irtype    = get_ir_type(type);
1672                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1673                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1674                 set_store(copyb_mem);
1675         }
1676 }
1677
1678 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1679 {
1680         tarval *all_one   = get_mode_all_one(mode);
1681         int     mode_size = get_mode_size_bits(mode);
1682
1683         assert(offset >= 0 && size >= 0);
1684         assert(offset + size <= mode_size);
1685         if (size == mode_size) {
1686                 return all_one;
1687         }
1688
1689         long    shiftr    = get_mode_size_bits(mode) - size;
1690         long    shiftl    = offset;
1691         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1692         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1693         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1694         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1695
1696         return mask1;
1697 }
1698
1699 static void bitfield_store_to_firm(const select_expression_t *expression,
1700                                    ir_node *addr, ir_node *value)
1701 {
1702         type_t       *type   = expression->base.type;
1703         ir_mode      *mode   = get_ir_mode(type);
1704
1705         assert(get_irn_mode(value) == mode || is_Bad(value));
1706
1707         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1708
1709         /* kill upper bits of value and shift to right position */
1710         ir_entity *entity       = expression->compound_entry->v.entity;
1711         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1712         ir_type   *entity_type  = get_entity_type(entity);
1713         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1714
1715         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1716         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1717         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1718         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1719         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1720         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1721
1722         /* load current value */
1723         ir_node  *mem             = get_store();
1724         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1725         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1726         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1727         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1728         tarval   *inv_mask        = tarval_not(shift_mask);
1729         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1730         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1731
1732         /* construct new value and store */
1733         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1734         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1735         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1736         set_store(store_mem);
1737
1738         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1739                 set_Load_volatility(load, volatility_is_volatile);
1740                 set_Store_volatility(store, volatility_is_volatile);
1741         }
1742 }
1743
1744 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1745                 ir_node *addr)
1746 {
1747         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1748         type_t   *type     = expression->base.type;
1749         ir_mode  *mode     = get_ir_mode(type);
1750         ir_node  *mem      = get_store();
1751         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1752         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1753         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1754
1755         load_res           = create_conv(dbgi, load_res, mode_int);
1756
1757         set_store(load_mem);
1758
1759         /* kill upper bits */
1760         ir_entity *entity       = expression->compound_entry->v.entity;
1761         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1762         ir_type   *entity_type  = get_entity_type(entity);
1763         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1764         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1765         assert(shift_bitsl >= 0);
1766         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1767         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1768         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1769
1770         long       shift_bitsr  = bitoffset + shift_bitsl;
1771         assert(shift_bitsr <= (long) machine_size);
1772         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1773         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1774         ir_node   *shiftr;
1775         if (mode_is_signed(mode)) {
1776                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1777         } else {
1778                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1779         }
1780
1781         return create_conv(dbgi, shiftr, mode);
1782 }
1783
1784 static void set_value_for_expression_addr(const expression_t *expression,
1785                                           ir_node *value, ir_node *addr)
1786 {
1787         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1788         value          = do_strict_conv(dbgi, value);
1789
1790         if (expression->kind == EXPR_REFERENCE) {
1791                 const reference_expression_t *ref = &expression->reference;
1792
1793                 declaration_t *declaration = ref->declaration;
1794                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1795                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1796                         set_value(declaration->v.value_number, value);
1797                         return;
1798                 }
1799         }
1800
1801         if (addr == NULL)
1802                 addr = expression_to_addr(expression);
1803
1804         type_t *type = skip_typeref(expression->base.type);
1805
1806         if (expression->kind == EXPR_SELECT) {
1807                 const select_expression_t *select = &expression->select;
1808
1809                 declaration_t *declaration = select->compound_entry;
1810                 if (declaration->type->kind == TYPE_BITFIELD) {
1811                         bitfield_store_to_firm(select, addr, value);
1812                         return;
1813                 }
1814         }
1815
1816         assign_value(dbgi, addr, type, value);
1817 }
1818
1819 static void set_value_for_expression(const expression_t *expression,
1820                                      ir_node *value)
1821 {
1822         set_value_for_expression_addr(expression, value, NULL);
1823 }
1824
1825 static ir_node *get_value_from_lvalue(const expression_t *expression,
1826                                       ir_node *addr)
1827 {
1828         if (expression->kind == EXPR_REFERENCE) {
1829                 const reference_expression_t *ref = &expression->reference;
1830
1831                 declaration_t *declaration = ref->declaration;
1832                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1833                 if (declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1834                         assert(addr == NULL);
1835                         ir_mode *mode = get_ir_mode(expression->base.type);
1836                         return get_value(declaration->v.value_number, mode);
1837                 }
1838         }
1839
1840         assert(addr != NULL);
1841         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1842
1843         ir_node *value;
1844         if (expression->kind == EXPR_SELECT &&
1845             expression->select.compound_entry->type->kind == TYPE_BITFIELD){
1846                 value = bitfield_extract_to_firm(&expression->select, addr);
1847         } else {
1848                 value = deref_address(dbgi, expression->base.type, addr);
1849         }
1850
1851         return value;
1852 }
1853
1854
1855 static ir_node *create_incdec(const unary_expression_t *expression)
1856 {
1857         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1858         const expression_t *value_expr = expression->value;
1859         ir_node            *addr       = expression_to_addr(value_expr);
1860         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1861
1862         type_t  *type = skip_typeref(expression->base.type);
1863         ir_mode *mode = get_ir_mode(expression->base.type);
1864
1865         ir_node *offset;
1866         if (is_type_pointer(type)) {
1867                 pointer_type_t *pointer_type = &type->pointer;
1868                 offset                       = get_type_size(pointer_type->points_to);
1869         } else {
1870                 assert(is_type_arithmetic(type));
1871                 offset = new_Const(mode, get_mode_one(mode));
1872         }
1873
1874         ir_node *result;
1875         ir_node *store_value;
1876         switch(expression->base.kind) {
1877         case EXPR_UNARY_POSTFIX_INCREMENT:
1878                 result      = value;
1879                 store_value = new_d_Add(dbgi, value, offset, mode);
1880                 break;
1881         case EXPR_UNARY_POSTFIX_DECREMENT:
1882                 result      = value;
1883                 store_value = new_d_Sub(dbgi, value, offset, mode);
1884                 break;
1885         case EXPR_UNARY_PREFIX_INCREMENT:
1886                 result      = new_d_Add(dbgi, value, offset, mode);
1887                 store_value = result;
1888                 break;
1889         case EXPR_UNARY_PREFIX_DECREMENT:
1890                 result      = new_d_Sub(dbgi, value, offset, mode);
1891                 store_value = result;
1892                 break;
1893         default:
1894                 panic("no incdec expr in create_incdec");
1895         }
1896
1897         set_value_for_expression_addr(value_expr, store_value, addr);
1898
1899         return result;
1900 }
1901
1902 static bool is_local_variable(expression_t *expression)
1903 {
1904         if (expression->kind != EXPR_REFERENCE)
1905                 return false;
1906         reference_expression_t *ref_expr    = &expression->reference;
1907         declaration_t          *declaration = ref_expr->declaration;
1908         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1909 }
1910
1911 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1912 {
1913         switch(kind) {
1914         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1915         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1916         case EXPR_BINARY_NOTEQUAL:
1917                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1918         case EXPR_BINARY_ISLESS:
1919         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1920         case EXPR_BINARY_ISLESSEQUAL:
1921         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1922         case EXPR_BINARY_ISGREATER:
1923         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1924         case EXPR_BINARY_ISGREATEREQUAL:
1925         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1926         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1927
1928         default:
1929                 break;
1930         }
1931         panic("trying to get pn_Cmp from non-comparison binexpr type");
1932 }
1933
1934 /**
1935  * Handle the assume optimizer hint: check if a Confirm
1936  * node can be created.
1937  *
1938  * @param dbi    debug info
1939  * @param expr   the IL assume expression
1940  *
1941  * we support here only some simple cases:
1942  *  - var rel const
1943  *  - const rel val
1944  *  - var rel var
1945  */
1946 static ir_node *handle_assume_compare(dbg_info *dbi,
1947                                       const binary_expression_t *expression)
1948 {
1949         expression_t  *op1 = expression->left;
1950         expression_t  *op2 = expression->right;
1951         declaration_t *var2, *var = NULL;
1952         ir_node       *res = NULL;
1953         pn_Cmp         cmp_val;
1954
1955         cmp_val = get_pnc(expression->base.kind, op1->base.type);
1956
1957         if (is_local_variable(op1) && is_local_variable(op2)) {
1958         var  = op1->reference.declaration;
1959             var2 = op2->reference.declaration;
1960
1961                 type_t  *const type = skip_typeref(var->type);
1962                 ir_mode *const mode = get_ir_mode(type);
1963
1964                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1965                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1966
1967                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1968                 set_value(var2->v.value_number, res);
1969
1970                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1971                 set_value(var->v.value_number, res);
1972
1973                 return res;
1974         }
1975
1976         expression_t *con;
1977         if (is_local_variable(op1) && is_constant_expression(op2)) {
1978                 var = op1->reference.declaration;
1979                 con = op2;
1980         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
1981                 cmp_val = get_inversed_pnc(cmp_val);
1982                 var = op2->reference.declaration;
1983                 con = op1;
1984         }
1985
1986         if (var != NULL) {
1987                 type_t  *const type = skip_typeref(var->type);
1988                 ir_mode *const mode = get_ir_mode(type);
1989
1990                 res = get_value(var->v.value_number, mode);
1991                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
1992                 set_value(var->v.value_number, res);
1993         }
1994         return res;
1995 }
1996
1997 /**
1998  * Handle the assume optimizer hint.
1999  *
2000  * @param dbi    debug info
2001  * @param expr   the IL assume expression
2002  */
2003 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2004         switch(expression->kind) {
2005         case EXPR_BINARY_EQUAL:
2006         case EXPR_BINARY_NOTEQUAL:
2007         case EXPR_BINARY_LESS:
2008         case EXPR_BINARY_LESSEQUAL:
2009         case EXPR_BINARY_GREATER:
2010         case EXPR_BINARY_GREATEREQUAL:
2011                 return handle_assume_compare(dbi, &expression->binary);
2012         default:
2013                 return NULL;
2014         }
2015 }
2016
2017 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2018 {
2019         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2020         type_t   *type = skip_typeref(expression->base.type);
2021
2022         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2023                 return expression_to_addr(expression->value);
2024
2025         const expression_t *value = expression->value;
2026
2027         switch(expression->base.kind) {
2028         case EXPR_UNARY_NEGATE: {
2029                 ir_node *value_node = expression_to_firm(value);
2030                 ir_mode *mode = get_ir_mode(type);
2031                 return new_d_Minus(dbgi, value_node, mode);
2032         }
2033         case EXPR_UNARY_PLUS:
2034                 return expression_to_firm(value);
2035         case EXPR_UNARY_BITWISE_NEGATE: {
2036                 ir_node *value_node = expression_to_firm(value);
2037                 ir_mode *mode = get_ir_mode(type);
2038                 return new_d_Not(dbgi, value_node, mode);
2039         }
2040         case EXPR_UNARY_NOT: {
2041                 ir_node *value_node = _expression_to_firm(value);
2042                 value_node          = create_conv(dbgi, value_node, mode_b);
2043                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2044                 return res;
2045         }
2046         case EXPR_UNARY_DEREFERENCE: {
2047                 ir_node *value_node = expression_to_firm(value);
2048                 type_t  *value_type = skip_typeref(value->base.type);
2049                 assert(is_type_pointer(value_type));
2050                 type_t  *points_to  = value_type->pointer.points_to;
2051                 return deref_address(dbgi, points_to, value_node);
2052         }
2053         case EXPR_UNARY_POSTFIX_INCREMENT:
2054         case EXPR_UNARY_POSTFIX_DECREMENT:
2055         case EXPR_UNARY_PREFIX_INCREMENT:
2056         case EXPR_UNARY_PREFIX_DECREMENT:
2057                 return create_incdec(expression);
2058         case EXPR_UNARY_CAST: {
2059                 ir_node *value_node = expression_to_firm(value);
2060                 if (is_type_scalar(type)) {
2061                         ir_mode *mode = get_ir_mode(type);
2062                         ir_node *node = create_conv(dbgi, value_node, mode);
2063                         node = do_strict_conv(dbgi, node);
2064                         return node;
2065                 } else {
2066                         /* make sure firm type is constructed */
2067                         (void) get_ir_type(type);
2068                         return value_node;
2069                 }
2070         }
2071         case EXPR_UNARY_CAST_IMPLICIT: {
2072                 ir_node *value_node = expression_to_firm(value);
2073                 if (is_type_scalar(type)) {
2074                         ir_mode *mode = get_ir_mode(type);
2075                         return create_conv(dbgi, value_node, mode);
2076                 } else {
2077                         return value_node;
2078                 }
2079         }
2080         case EXPR_UNARY_ASSUME:
2081                 if (firm_opt.confirm)
2082                         return handle_assume(dbgi, value);
2083                 else
2084                         return NULL;
2085
2086         default:
2087                 break;
2088         }
2089         panic("invalid UNEXPR type found");
2090 }
2091
2092 /**
2093  * produces a 0/1 depending of the value of a mode_b node
2094  */
2095 static ir_node *produce_condition_result(const expression_t *expression,
2096                                          dbg_info *dbgi)
2097 {
2098         ir_mode *mode      = get_ir_mode(expression->base.type);
2099         ir_node *cur_block = get_cur_block();
2100
2101         ir_node *one_block = new_immBlock();
2102         ir_node *one       = new_Const(mode, get_mode_one(mode));
2103         ir_node *jmp_one   = new_d_Jmp(dbgi);
2104
2105         ir_node *zero_block = new_immBlock();
2106         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2107         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2108
2109         set_cur_block(cur_block);
2110         create_condition_evaluation(expression, one_block, zero_block);
2111         mature_immBlock(one_block);
2112         mature_immBlock(zero_block);
2113
2114         ir_node *common_block = new_immBlock();
2115         add_immBlock_pred(common_block, jmp_one);
2116         add_immBlock_pred(common_block, jmp_zero);
2117         mature_immBlock(common_block);
2118
2119         ir_node *in[2] = { one, zero };
2120         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2121
2122         return val;
2123 }
2124
2125 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2126                 ir_node *value, type_t *type)
2127 {
2128         pointer_type_t *const pointer_type = &type->pointer;
2129         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2130         unsigned              elem_size    = get_type_size_const(points_to);
2131
2132         /* gcc extension */
2133         if (elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) {
2134                 elem_size = 1;
2135         }
2136
2137         assert(elem_size >= 1);
2138         if (elem_size == 1)
2139                 return value;
2140
2141         value = create_conv(dbgi, value, mode_int);
2142         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2143         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2144         return mul;
2145 }
2146
2147 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2148                           ir_node *left, ir_node *right)
2149 {
2150         ir_mode  *mode;
2151         type_t   *type_left  = skip_typeref(expression->left->base.type);
2152         type_t   *type_right = skip_typeref(expression->right->base.type);
2153
2154         expression_kind_t kind = expression->base.kind;
2155
2156         switch (kind) {
2157         case EXPR_BINARY_SHIFTLEFT:
2158         case EXPR_BINARY_SHIFTRIGHT:
2159         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2160         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2161                 mode  = get_irn_mode(left);
2162                 right = create_conv(dbgi, right, mode_uint);
2163                 break;
2164
2165         case EXPR_BINARY_SUB:
2166                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2167                         const pointer_type_t *const ptr_type = &type_left->pointer;
2168
2169                         mode = get_ir_mode(expression->base.type);
2170                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2171                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2172                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2173                         ir_node *const no_mem    = new_NoMem();
2174                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2175                                                                                                    mode, op_pin_state_floats);
2176                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2177                 }
2178                 /* fallthrough */
2179         case EXPR_BINARY_SUB_ASSIGN:
2180                 if (is_type_pointer(type_left)) {
2181                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2182                         mode  = get_ir_mode(type_left);
2183                         break;
2184                 }
2185                 goto normal_node;
2186
2187         case EXPR_BINARY_ADD:
2188         case EXPR_BINARY_ADD_ASSIGN:
2189                 if (is_type_pointer(type_left)) {
2190                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2191                         mode  = get_ir_mode(type_left);
2192                         break;
2193                 } else if (is_type_pointer(type_right)) {
2194                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2195                         mode  = get_ir_mode(type_right);
2196                         break;
2197                 }
2198                 goto normal_node;
2199
2200         default:
2201 normal_node:
2202                 mode = get_irn_mode(right);
2203                 left = create_conv(dbgi, left, mode);
2204                 break;
2205         }
2206
2207         switch (kind) {
2208         case EXPR_BINARY_ADD_ASSIGN:
2209         case EXPR_BINARY_ADD:
2210                 return new_d_Add(dbgi, left, right, mode);
2211         case EXPR_BINARY_SUB_ASSIGN:
2212         case EXPR_BINARY_SUB:
2213                 return new_d_Sub(dbgi, left, right, mode);
2214         case EXPR_BINARY_MUL_ASSIGN:
2215         case EXPR_BINARY_MUL:
2216                 return new_d_Mul(dbgi, left, right, mode);
2217         case EXPR_BINARY_BITWISE_AND:
2218         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2219                 return new_d_And(dbgi, left, right, mode);
2220         case EXPR_BINARY_BITWISE_OR:
2221         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2222                 return new_d_Or(dbgi, left, right, mode);
2223         case EXPR_BINARY_BITWISE_XOR:
2224         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2225                 return new_d_Eor(dbgi, left, right, mode);
2226         case EXPR_BINARY_SHIFTLEFT:
2227         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2228                 return new_d_Shl(dbgi, left, right, mode);
2229         case EXPR_BINARY_SHIFTRIGHT:
2230         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2231                 if (mode_is_signed(mode)) {
2232                         return new_d_Shrs(dbgi, left, right, mode);
2233                 } else {
2234                         return new_d_Shr(dbgi, left, right, mode);
2235                 }
2236         case EXPR_BINARY_DIV:
2237         case EXPR_BINARY_DIV_ASSIGN: {
2238                 ir_node *pin = new_Pin(new_NoMem());
2239                 ir_node *op;
2240                 ir_node *res;
2241                 if (mode_is_float(mode)) {
2242                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2243                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2244                 } else {
2245                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2246                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2247                 }
2248                 return res;
2249         }
2250         case EXPR_BINARY_MOD:
2251         case EXPR_BINARY_MOD_ASSIGN: {
2252                 ir_node *pin = new_Pin(new_NoMem());
2253                 assert(!mode_is_float(mode));
2254                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2255                                          op_pin_state_floats);
2256                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2257                 return res;
2258         }
2259         default:
2260                 panic("unexpected expression kind");
2261         }
2262 }
2263
2264 static ir_node *create_lazy_op(const binary_expression_t *expression)
2265 {
2266         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2267         type_t   *type = expression->base.type;
2268         ir_mode  *mode = get_ir_mode(type);
2269
2270         if (is_constant_expression(expression->left)) {
2271                 long val = fold_constant(expression->left);
2272                 expression_kind_t ekind = expression->base.kind;
2273                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
2274                                 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
2275                         return expression_to_firm(expression->right);
2276                 } else {
2277                         assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
2278                                         || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
2279                         return new_Const(mode, get_mode_one(mode));
2280                 }
2281         }
2282
2283         return produce_condition_result((const expression_t*) expression, dbgi);
2284 }
2285
2286 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2287                                             ir_node *right, ir_mode *mode);
2288
2289 static ir_node *create_assign_binop(const binary_expression_t *expression)
2290 {
2291         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2292         const expression_t *left_expr = expression->left;
2293         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2294         ir_node            *left_addr = expression_to_addr(left_expr);
2295         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2296         ir_node            *right     = expression_to_firm(expression->right);
2297         ir_node            *result    = create_op(dbgi, expression, left, right);
2298
2299         result = create_conv(dbgi, result, left_mode);
2300         result = do_strict_conv(dbgi, result);
2301
2302         set_value_for_expression_addr(left_expr, result, left_addr);
2303
2304         return result;
2305 }
2306
2307 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2308 {
2309         expression_kind_t kind = expression->base.kind;
2310
2311         switch(kind) {
2312         case EXPR_BINARY_EQUAL:
2313         case EXPR_BINARY_NOTEQUAL:
2314         case EXPR_BINARY_LESS:
2315         case EXPR_BINARY_LESSEQUAL:
2316         case EXPR_BINARY_GREATER:
2317         case EXPR_BINARY_GREATEREQUAL:
2318         case EXPR_BINARY_ISGREATER:
2319         case EXPR_BINARY_ISGREATEREQUAL:
2320         case EXPR_BINARY_ISLESS:
2321         case EXPR_BINARY_ISLESSEQUAL:
2322         case EXPR_BINARY_ISLESSGREATER:
2323         case EXPR_BINARY_ISUNORDERED: {
2324                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2325                 ir_node *left  = expression_to_firm(expression->left);
2326                 ir_node *right = expression_to_firm(expression->right);
2327                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2328                 long     pnc   = get_pnc(kind, expression->left->base.type);
2329                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2330                 return proj;
2331         }
2332         case EXPR_BINARY_ASSIGN: {
2333                 ir_node *addr  = expression_to_addr(expression->left);
2334                 ir_node *right = expression_to_firm(expression->right);
2335                 set_value_for_expression_addr(expression->left, right, addr);
2336
2337                 return right;
2338         }
2339         case EXPR_BINARY_ADD:
2340         case EXPR_BINARY_SUB:
2341         case EXPR_BINARY_MUL:
2342         case EXPR_BINARY_DIV:
2343         case EXPR_BINARY_MOD:
2344         case EXPR_BINARY_BITWISE_AND:
2345         case EXPR_BINARY_BITWISE_OR:
2346         case EXPR_BINARY_BITWISE_XOR:
2347         case EXPR_BINARY_SHIFTLEFT:
2348         case EXPR_BINARY_SHIFTRIGHT:
2349         {
2350                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2351                 ir_node  *left  = expression_to_firm(expression->left);
2352                 ir_node  *right = expression_to_firm(expression->right);
2353                 return create_op(dbgi, expression, left, right);
2354         }
2355         case EXPR_BINARY_LOGICAL_AND:
2356         case EXPR_BINARY_LOGICAL_OR:
2357                 return create_lazy_op(expression);
2358         case EXPR_BINARY_COMMA:
2359                 /* create side effects of left side */
2360                 (void) expression_to_firm(expression->left);
2361                 return _expression_to_firm(expression->right);
2362
2363         case EXPR_BINARY_ADD_ASSIGN:
2364         case EXPR_BINARY_SUB_ASSIGN:
2365         case EXPR_BINARY_MUL_ASSIGN:
2366         case EXPR_BINARY_MOD_ASSIGN:
2367         case EXPR_BINARY_DIV_ASSIGN:
2368         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2369         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2370         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2371         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2372         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2373                 return create_assign_binop(expression);
2374         case EXPR_BINARY_BUILTIN_EXPECT:
2375                 return _expression_to_firm(expression->left);
2376         default:
2377                 panic("TODO binexpr type");
2378         }
2379 }
2380
2381 static ir_node *array_access_addr(const array_access_expression_t *expression)
2382 {
2383         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2384         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2385         ir_node  *offset    = expression_to_firm(expression->index);
2386
2387         type_t  *offset_type = skip_typeref(expression->index->base.type);
2388         ir_mode *mode;
2389         if (is_type_signed(offset_type)) {
2390                 mode = get_ir_mode(type_ssize_t);
2391         } else {
2392                 mode = get_ir_mode(type_size_t);
2393         }
2394         offset = create_conv(dbgi, offset, mode);
2395
2396         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2397         assert(is_type_pointer(ref_type));
2398         pointer_type_t *pointer_type = &ref_type->pointer;
2399
2400         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2401         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2402         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2403                                              mode);
2404         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2405
2406         return result;
2407 }
2408
2409 static ir_node *array_access_to_firm(
2410                 const array_access_expression_t *expression)
2411 {
2412         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2413         ir_node  *addr   = array_access_addr(expression);
2414         type_t   *type   = revert_automatic_type_conversion(
2415                         (const expression_t*) expression);
2416         type             = skip_typeref(type);
2417
2418         return deref_address(dbgi, type, addr);
2419 }
2420
2421 static long get_offsetof_offset(const offsetof_expression_t *expression)
2422 {
2423         type_t *orig_type = expression->type;
2424         long    offset    = 0;
2425
2426         designator_t *designator = expression->designator;
2427         for( ; designator != NULL; designator = designator->next) {
2428                 type_t *type = skip_typeref(orig_type);
2429                 /* be sure the type is constructed */
2430                 (void) get_ir_type(type);
2431
2432                 if (designator->symbol != NULL) {
2433                         assert(is_type_compound(type));
2434                         symbol_t *symbol = designator->symbol;
2435
2436                         declaration_t *declaration = type->compound.declaration;
2437                         declaration_t *iter        = declaration->scope.declarations;
2438                         for( ; iter != NULL; iter = iter->next) {
2439                                 if (iter->symbol == symbol) {
2440                                         break;
2441                                 }
2442                         }
2443                         assert(iter != NULL);
2444
2445                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2446                         offset += get_entity_offset(iter->v.entity);
2447
2448                         orig_type = iter->type;
2449                 } else {
2450                         expression_t *array_index = designator->array_index;
2451                         assert(designator->array_index != NULL);
2452                         assert(is_type_array(type));
2453                         assert(is_type_valid(array_index->base.type));
2454
2455                         long index         = fold_constant(array_index);
2456                         ir_type *arr_type  = get_ir_type(type);
2457                         ir_type *elem_type = get_array_element_type(arr_type);
2458                         long     elem_size = get_type_size_bytes(elem_type);
2459
2460                         offset += index * elem_size;
2461
2462                         orig_type = type->array.element_type;
2463                 }
2464         }
2465
2466         return offset;
2467 }
2468
2469 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2470 {
2471         ir_mode  *mode   = get_ir_mode(expression->base.type);
2472         long      offset = get_offsetof_offset(expression);
2473         tarval   *tv     = new_tarval_from_long(offset, mode);
2474         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2475
2476         return new_d_Const(dbgi, mode, tv);
2477 }
2478
2479 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2480                                      ir_entity *entity, type_t *type);
2481
2482 static ir_node *compound_literal_to_firm(
2483                 const compound_literal_expression_t *expression)
2484 {
2485         type_t *type = expression->type;
2486
2487         /* create an entity on the stack */
2488         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2489
2490         ident     *const id     = id_unique("CompLit.%u");
2491         ir_type   *const irtype = get_ir_type(type);
2492         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2493         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2494         set_entity_ld_ident(entity, id);
2495
2496         set_entity_variability(entity, variability_uninitialized);
2497
2498         /* create initialisation code */
2499         initializer_t *initializer = expression->initializer;
2500         create_local_initializer(initializer, dbgi, entity, type);
2501
2502         /* create a sel for the compound literal address */
2503         ir_node *frame = get_local_frame(entity);
2504         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2505         return sel;
2506 }
2507
2508 /**
2509  * Transform a sizeof expression into Firm code.
2510  */
2511 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2512 {
2513         type_t *type = expression->type;
2514         if (type == NULL) {
2515                 type = expression->tp_expression->base.type;
2516                 assert(type != NULL);
2517         }
2518
2519         type = skip_typeref(type);
2520         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2521         if (is_type_array(type) && type->array.is_vla
2522                         && expression->tp_expression != NULL) {
2523                 expression_to_firm(expression->tp_expression);
2524         }
2525
2526         return get_type_size(type);
2527 }
2528
2529 /**
2530  * Transform an alignof expression into Firm code.
2531  */
2532 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2533 {
2534         type_t *type = expression->type;
2535         if (type == NULL) {
2536                 /* beware: if expression is a variable reference, return the
2537                    alignment of the variable. */
2538                 const expression_t *tp_expression = expression->tp_expression;
2539                 const declaration_t *declaration = expr_is_variable(tp_expression);
2540                 if (declaration != NULL) {
2541                         /* TODO: get the alignment of this variable. */
2542                 }
2543                 type = tp_expression->base.type;
2544                 assert(type != NULL);
2545         }
2546
2547         ir_mode *const mode = get_ir_mode(expression->base.type);
2548         symconst_symbol sym;
2549         sym.type_p = get_ir_type(type);
2550         return new_SymConst(mode, sym, symconst_type_align);
2551 }
2552
2553 static void init_ir_types(void);
2554 long fold_constant(const expression_t *expression)
2555 {
2556         bool constant_folding_old = constant_folding;
2557         constant_folding = true;
2558
2559         init_ir_types();
2560
2561         assert(is_constant_expression(expression));
2562
2563         ir_graph *old_current_ir_graph = current_ir_graph;
2564         if (current_ir_graph == NULL) {
2565                 current_ir_graph = get_const_code_irg();
2566         }
2567
2568         ir_node *cnst = expression_to_firm(expression);
2569         current_ir_graph = old_current_ir_graph;
2570
2571         if (!is_Const(cnst)) {
2572                 panic("couldn't fold constant\n");
2573         }
2574
2575         tarval *tv = get_Const_tarval(cnst);
2576         if (!tarval_is_long(tv)) {
2577                 panic("result of constant folding is not integer\n");
2578         }
2579
2580         constant_folding = constant_folding_old;
2581
2582         return get_tarval_long(tv);
2583 }
2584
2585 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2586 {
2587         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2588
2589         /* first try to fold a constant condition */
2590         if (is_constant_expression(expression->condition)) {
2591                 long val = fold_constant(expression->condition);
2592                 if (val) {
2593                         return expression_to_firm(expression->true_expression);
2594                 } else {
2595                         return expression_to_firm(expression->false_expression);
2596                 }
2597         }
2598
2599         ir_node *cur_block   = get_cur_block();
2600
2601         /* create the true block */
2602         ir_node *true_block  = new_immBlock();
2603
2604         ir_node *true_val = expression_to_firm(expression->true_expression);
2605         ir_node *true_jmp = new_Jmp();
2606
2607         /* create the false block */
2608         ir_node *false_block = new_immBlock();
2609
2610         ir_node *false_val = expression_to_firm(expression->false_expression);
2611         ir_node *false_jmp = new_Jmp();
2612
2613         /* create the condition evaluation */
2614         set_cur_block(cur_block);
2615         create_condition_evaluation(expression->condition, true_block, false_block);
2616         mature_immBlock(true_block);
2617         mature_immBlock(false_block);
2618
2619         /* create the common block */
2620         ir_node *common_block = new_immBlock();
2621         add_immBlock_pred(common_block, true_jmp);
2622         add_immBlock_pred(common_block, false_jmp);
2623         mature_immBlock(common_block);
2624
2625         /* TODO improve static semantics, so either both or no values are NULL */
2626         if (true_val == NULL || false_val == NULL)
2627                 return NULL;
2628
2629         ir_node *in[2] = { true_val, false_val };
2630         ir_mode *mode  = get_irn_mode(true_val);
2631         assert(get_irn_mode(false_val) == mode);
2632         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2633
2634         return val;
2635 }
2636
2637 /**
2638  * Returns an IR-node representing the address of a field.
2639  */
2640 static ir_node *select_addr(const select_expression_t *expression)
2641 {
2642         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2643
2644         ir_node *compound_addr = expression_to_firm(expression->compound);
2645
2646         /* make sure the type is constructed */
2647         type_t *type = skip_typeref(expression->compound->base.type);
2648         if (is_type_pointer(type)) {
2649                 type = type->pointer.points_to;
2650         }
2651         (void) get_ir_type(type);
2652
2653         declaration_t *entry = expression->compound_entry;
2654         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2655         ir_entity     *entity = entry->v.entity;
2656
2657         assert(entity != NULL);
2658
2659         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2660
2661         return sel;
2662 }
2663
2664 static ir_node *select_to_firm(const select_expression_t *expression)
2665 {
2666         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2667         ir_node  *addr = select_addr(expression);
2668         type_t   *type = revert_automatic_type_conversion(
2669                         (const expression_t*) expression);
2670         type           = skip_typeref(type);
2671
2672         declaration_t *entry      = expression->compound_entry;
2673         type_t        *entry_type = skip_typeref(entry->type);
2674
2675         if (entry_type->kind == TYPE_BITFIELD) {
2676                 return bitfield_extract_to_firm(expression, addr);
2677         }
2678
2679         return deref_address(dbgi, type, addr);
2680 }
2681
2682 /* Values returned by __builtin_classify_type. */
2683 typedef enum gcc_type_class
2684 {
2685         no_type_class = -1,
2686         void_type_class,
2687         integer_type_class,
2688         char_type_class,
2689         enumeral_type_class,
2690         boolean_type_class,
2691         pointer_type_class,
2692         reference_type_class,
2693         offset_type_class,
2694         real_type_class,
2695         complex_type_class,
2696         function_type_class,
2697         method_type_class,
2698         record_type_class,
2699         union_type_class,
2700         array_type_class,
2701         string_type_class,
2702         set_type_class,
2703         file_type_class,
2704         lang_type_class
2705 } gcc_type_class;
2706
2707 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2708 {
2709         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2710
2711         gcc_type_class tc;
2712         switch (type->kind)
2713         {
2714                 case TYPE_ATOMIC: {
2715                         const atomic_type_t *const atomic_type = &type->atomic;
2716                         switch (atomic_type->akind) {
2717                                 /* should not be reached */
2718                                 case ATOMIC_TYPE_INVALID:
2719                                         tc = no_type_class;
2720                                         goto make_const;
2721
2722                                 /* gcc cannot do that */
2723                                 case ATOMIC_TYPE_VOID:
2724                                         tc = void_type_class;
2725                                         goto make_const;
2726
2727                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2728                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2729                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2730                                 case ATOMIC_TYPE_SHORT:
2731                                 case ATOMIC_TYPE_USHORT:
2732                                 case ATOMIC_TYPE_INT:
2733                                 case ATOMIC_TYPE_UINT:
2734                                 case ATOMIC_TYPE_LONG:
2735                                 case ATOMIC_TYPE_ULONG:
2736                                 case ATOMIC_TYPE_LONGLONG:
2737                                 case ATOMIC_TYPE_ULONGLONG:
2738                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2739                                         tc = integer_type_class;
2740                                         goto make_const;
2741
2742                                 case ATOMIC_TYPE_FLOAT:
2743                                 case ATOMIC_TYPE_DOUBLE:
2744                                 case ATOMIC_TYPE_LONG_DOUBLE:
2745                                         tc = real_type_class;
2746                                         goto make_const;
2747                         }
2748                         panic("Unexpected atomic type in classify_type_to_firm().");
2749                 }
2750
2751                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2752                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2753                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2754                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2755                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2756                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2757                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2758                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2759
2760                 /* gcc handles this as integer */
2761                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2762
2763                 case TYPE_BUILTIN:
2764                 /* typedef/typeof should be skipped already */
2765                 case TYPE_TYPEDEF:
2766                 case TYPE_TYPEOF:
2767                 case TYPE_INVALID:
2768                 case TYPE_ERROR:
2769                         break;
2770         }
2771         panic("unexpected TYPE classify_type_to_firm().");
2772
2773 make_const: ;
2774         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2775         ir_mode  *const mode = mode_int;
2776         tarval   *const tv   = new_tarval_from_long(tc, mode);
2777         return new_d_Const(dbgi, mode, tv);
2778 }
2779
2780 static ir_node *function_name_to_firm(
2781                 const funcname_expression_t *const expr)
2782 {
2783         switch(expr->kind) {
2784         case FUNCNAME_FUNCTION:
2785         case FUNCNAME_PRETTY_FUNCTION:
2786         case FUNCNAME_FUNCDNAME:
2787                 if (current_function_name == NULL) {
2788                         const source_position_t *const src_pos = &expr->base.source_position;
2789                         const char *const name = current_function_decl->symbol->string;
2790                         const string_t string = { name, strlen(name) + 1 };
2791                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2792                 }
2793                 return current_function_name;
2794         case FUNCNAME_FUNCSIG:
2795                 if (current_funcsig == NULL) {
2796                         const source_position_t *const src_pos = &expr->base.source_position;
2797                         ir_entity *ent = get_irg_entity(current_ir_graph);
2798                         const char *const name = get_entity_ld_name(ent);
2799                         const string_t string = { name, strlen(name) + 1 };
2800                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2801                 }
2802                 return current_funcsig;
2803         }
2804         panic("Unsupported function name");
2805 }
2806
2807 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2808 {
2809         statement_t *statement = expr->statement;
2810
2811         assert(statement->kind == STATEMENT_COMPOUND);
2812         return compound_statement_to_firm(&statement->compound);
2813 }
2814
2815 static ir_node *va_start_expression_to_firm(
2816         const va_start_expression_t *const expr)
2817 {
2818         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2819         int        const n           = get_method_n_params(method_type) - 1;
2820         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2821         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2822         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2823         ir_node   *const no_mem      = new_NoMem();
2824         ir_node   *const arg_sel     =
2825                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2826
2827         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2828         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2829         set_value_for_expression(expr->ap, add);
2830
2831         return NULL;
2832 }
2833
2834 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2835 {
2836         type_t       *const type    = expr->base.type;
2837         expression_t *const ap_expr = expr->ap;
2838         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2839         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2840         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2841         ir_node      *const res     = deref_address(dbgi, type, ap);
2842
2843         ir_node      *const cnst    = get_type_size(expr->base.type);
2844         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2845
2846         set_value_for_expression_addr(ap_expr, add, ap_addr);
2847
2848         return res;
2849 }
2850
2851 static ir_node *dereference_addr(const unary_expression_t *const expression)
2852 {
2853         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2854         return expression_to_firm(expression->value);
2855 }
2856
2857 /**
2858  * Returns a IR-node representing an lvalue of the given expression.
2859  */
2860 static ir_node *expression_to_addr(const expression_t *expression)
2861 {
2862         switch(expression->kind) {
2863         case EXPR_REFERENCE:
2864                 return reference_addr(&expression->reference);
2865         case EXPR_ARRAY_ACCESS:
2866                 return array_access_addr(&expression->array_access);
2867         case EXPR_SELECT:
2868                 return select_addr(&expression->select);
2869         case EXPR_CALL:
2870                 return call_expression_to_firm(&expression->call);
2871         case EXPR_UNARY_DEREFERENCE: {
2872                 return dereference_addr(&expression->unary);
2873         }
2874         default:
2875                 break;
2876         }
2877         panic("trying to get address of non-lvalue");
2878 }
2879
2880 static ir_node *builtin_constant_to_firm(
2881                 const builtin_constant_expression_t *expression)
2882 {
2883         ir_mode *mode = get_ir_mode(expression->base.type);
2884         long     v;
2885
2886         if (is_constant_expression(expression->value)) {
2887                 v = 1;
2888         } else {
2889                 v = 0;
2890         }
2891         return new_Const_long(mode, v);
2892 }
2893
2894 static ir_node *builtin_prefetch_to_firm(
2895                 const builtin_prefetch_expression_t *expression)
2896 {
2897         ir_node *adr = expression_to_firm(expression->adr);
2898         /* no Firm support for prefetch yet */
2899         (void) adr;
2900         return NULL;
2901 }
2902
2903 /**
2904  * creates firm nodes for an expression. The difference between this function
2905  * and expression_to_firm is, that this version might produce mode_b nodes
2906  * instead of mode_Is.
2907  */
2908 static ir_node *_expression_to_firm(const expression_t *expression)
2909 {
2910 #ifndef NDEBUG
2911         if (!constant_folding) {
2912                 assert(!expression->base.transformed);
2913                 ((expression_t*) expression)->base.transformed = true;
2914         }
2915 #endif
2916
2917         switch(expression->kind) {
2918         case EXPR_CHARACTER_CONSTANT:
2919                 return character_constant_to_firm(&expression->conste);
2920         case EXPR_WIDE_CHARACTER_CONSTANT:
2921                 return wide_character_constant_to_firm(&expression->conste);
2922         case EXPR_CONST:
2923                 return const_to_firm(&expression->conste);
2924         case EXPR_STRING_LITERAL:
2925                 return string_literal_to_firm(&expression->string);
2926         case EXPR_WIDE_STRING_LITERAL:
2927                 return wide_string_literal_to_firm(&expression->wide_string);
2928         case EXPR_REFERENCE:
2929                 return reference_expression_to_firm(&expression->reference);
2930         case EXPR_CALL:
2931                 return call_expression_to_firm(&expression->call);
2932         EXPR_UNARY_CASES
2933                 return unary_expression_to_firm(&expression->unary);
2934         EXPR_BINARY_CASES
2935                 return binary_expression_to_firm(&expression->binary);
2936         case EXPR_ARRAY_ACCESS:
2937                 return array_access_to_firm(&expression->array_access);
2938         case EXPR_SIZEOF:
2939                 return sizeof_to_firm(&expression->typeprop);
2940         case EXPR_ALIGNOF:
2941                 return alignof_to_firm(&expression->typeprop);
2942         case EXPR_CONDITIONAL:
2943                 return conditional_to_firm(&expression->conditional);
2944         case EXPR_SELECT:
2945                 return select_to_firm(&expression->select);
2946         case EXPR_CLASSIFY_TYPE:
2947                 return classify_type_to_firm(&expression->classify_type);
2948         case EXPR_FUNCNAME:
2949                 return function_name_to_firm(&expression->funcname);
2950         case EXPR_STATEMENT:
2951                 return statement_expression_to_firm(&expression->statement);
2952         case EXPR_VA_START:
2953                 return va_start_expression_to_firm(&expression->va_starte);
2954         case EXPR_VA_ARG:
2955                 return va_arg_expression_to_firm(&expression->va_arge);
2956         case EXPR_BUILTIN_SYMBOL:
2957                 panic("unimplemented expression found");
2958         case EXPR_BUILTIN_CONSTANT_P:
2959                 return builtin_constant_to_firm(&expression->builtin_constant);
2960         case EXPR_BUILTIN_PREFETCH:
2961                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2962         case EXPR_OFFSETOF:
2963                 return offsetof_to_firm(&expression->offsetofe);
2964         case EXPR_COMPOUND_LITERAL:
2965                 return compound_literal_to_firm(&expression->compound_literal);
2966
2967         case EXPR_UNKNOWN:
2968         case EXPR_INVALID:
2969                 break;
2970         }
2971         panic("invalid expression found");
2972 }
2973
2974 static bool produces_mode_b(const expression_t *expression)
2975 {
2976         switch (expression->kind) {
2977         case EXPR_BINARY_EQUAL:
2978         case EXPR_BINARY_NOTEQUAL:
2979         case EXPR_BINARY_LESS:
2980         case EXPR_BINARY_LESSEQUAL:
2981         case EXPR_BINARY_GREATER:
2982         case EXPR_BINARY_GREATEREQUAL:
2983         case EXPR_BINARY_ISGREATER:
2984         case EXPR_BINARY_ISGREATEREQUAL:
2985         case EXPR_BINARY_ISLESS:
2986         case EXPR_BINARY_ISLESSEQUAL:
2987         case EXPR_BINARY_ISLESSGREATER:
2988         case EXPR_BINARY_ISUNORDERED:
2989         case EXPR_UNARY_NOT:
2990                 return true;
2991
2992         case EXPR_BINARY_BUILTIN_EXPECT:
2993                 return produces_mode_b(expression->binary.left);
2994         case EXPR_BINARY_COMMA:
2995                 return produces_mode_b(expression->binary.right);
2996
2997         default:
2998                 return false;
2999         }
3000 }
3001
3002 static ir_node *expression_to_firm(const expression_t *expression)
3003 {
3004         if (!produces_mode_b(expression)) {
3005                 ir_node *res = _expression_to_firm(expression);
3006                 assert(res == NULL || get_irn_mode(res) != mode_b);
3007                 return res;
3008         }
3009
3010         if (is_constant_expression(expression)) {
3011                 ir_node *res  = _expression_to_firm(expression);
3012                 ir_mode *mode = get_ir_mode(expression->base.type);
3013                 assert(is_Const(res));
3014                 if (is_Const_null(res)) {
3015                         return new_Const_long(mode, 0);
3016                 } else {
3017                         return new_Const_long(mode, 1);
3018                 }
3019         }
3020
3021         /* we have to produce a 0/1 from the mode_b expression */
3022         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3023         return produce_condition_result(expression, dbgi);
3024 }
3025
3026 static ir_node *expression_to_modeb(const expression_t *expression)
3027 {
3028         ir_node *res = _expression_to_firm(expression);
3029         res          = create_conv(NULL, res, mode_b);
3030
3031         return res;
3032 }
3033
3034 /**
3035  * create a short-circuit expression evaluation that tries to construct
3036  * efficient control flow structures for &&, || and ! expressions
3037  */
3038 static void create_condition_evaluation(const expression_t *expression,
3039                                         ir_node *true_block,
3040                                         ir_node *false_block)
3041 {
3042         switch(expression->kind) {
3043         case EXPR_UNARY_NOT: {
3044                 const unary_expression_t *unary_expression = &expression->unary;
3045                 create_condition_evaluation(unary_expression->value, false_block,
3046                                             true_block);
3047                 return;
3048         }
3049         case EXPR_BINARY_LOGICAL_AND: {
3050                 const binary_expression_t *binary_expression = &expression->binary;
3051
3052                 ir_node *cur_block   = get_cur_block();
3053                 ir_node *extra_block = new_immBlock();
3054                 set_cur_block(cur_block);
3055                 create_condition_evaluation(binary_expression->left, extra_block,
3056                                             false_block);
3057                 mature_immBlock(extra_block);
3058                 set_cur_block(extra_block);
3059                 create_condition_evaluation(binary_expression->right, true_block,
3060                                             false_block);
3061                 return;
3062         }
3063         case EXPR_BINARY_LOGICAL_OR: {
3064                 const binary_expression_t *binary_expression = &expression->binary;
3065
3066                 ir_node *cur_block   = get_cur_block();
3067                 ir_node *extra_block = new_immBlock();
3068                 set_cur_block(cur_block);
3069                 create_condition_evaluation(binary_expression->left, true_block,
3070                                             extra_block);
3071                 mature_immBlock(extra_block);
3072                 set_cur_block(extra_block);
3073                 create_condition_evaluation(binary_expression->right, true_block,
3074                                             false_block);
3075                 return;
3076         }
3077         default:
3078                 break;
3079         }
3080
3081         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3082         ir_node  *condition  = expression_to_modeb(expression);
3083         ir_node  *cond       = new_d_Cond(dbgi, condition);
3084         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3085         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3086
3087         /* set branch prediction info based on __builtin_expect */
3088         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3089                 long               cnst = fold_constant(expression->binary.right);
3090                 cond_jmp_predicate pred;
3091
3092                 if (cnst == 0) {
3093                         pred = COND_JMP_PRED_FALSE;
3094                 } else {
3095                         pred = COND_JMP_PRED_TRUE;
3096                 }
3097                 set_Cond_jmp_pred(cond, pred);
3098         }
3099
3100         add_immBlock_pred(true_block, true_proj);
3101         if (false_block != NULL) {
3102                 add_immBlock_pred(false_block, false_proj);
3103         }
3104
3105         set_cur_block(NULL);
3106 }
3107
3108
3109
3110 static void create_declaration_entity(declaration_t *declaration,
3111                                       declaration_kind_t declaration_kind,
3112                                       ir_type *parent_type)
3113 {
3114         type_t    *const type   = skip_typeref(declaration->type);
3115         if (is_type_function(type)) {
3116                 (void) get_function_entity(declaration);
3117                 return;
3118         }
3119
3120         ident     *const id     = new_id_from_str(declaration->symbol->string);
3121         ir_type   *const irtype = get_ir_type(type);
3122         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
3123         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
3124
3125         declaration->declaration_kind = (unsigned char) declaration_kind;
3126         declaration->v.entity         = entity;
3127         set_entity_variability(entity, variability_uninitialized);
3128         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3129         if (parent_type == get_tls_type())
3130                 set_entity_allocation(entity, allocation_automatic);
3131         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3132                 set_entity_allocation(entity, allocation_static);
3133
3134         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3135                 set_entity_volatility(entity, volatility_is_volatile);
3136         }
3137 }
3138
3139
3140 typedef struct type_path_entry_t type_path_entry_t;
3141 struct type_path_entry_t {
3142         type_t           *type;
3143         ir_initializer_t *initializer;
3144         size_t            index;
3145         declaration_t    *compound_entry;
3146 };
3147
3148 typedef struct type_path_t type_path_t;
3149 struct type_path_t {
3150         type_path_entry_t *path;
3151         type_t            *top_type;
3152         bool               invalid;
3153 };
3154
3155 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3156 {
3157         size_t len = ARR_LEN(path->path);
3158
3159         for(size_t i = 0; i < len; ++i) {
3160                 const type_path_entry_t *entry = & path->path[i];
3161
3162                 type_t *type = skip_typeref(entry->type);
3163                 if (is_type_compound(type)) {
3164                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
3165                 } else if (is_type_array(type)) {
3166                         fprintf(stderr, "[%zd]", entry->index);
3167                 } else {
3168                         fprintf(stderr, "-INVALID-");
3169                 }
3170         }
3171         fprintf(stderr, "  (");
3172         print_type(path->top_type);
3173         fprintf(stderr, ")");
3174 }
3175
3176 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3177 {
3178         size_t len = ARR_LEN(path->path);
3179         assert(len > 0);
3180         return & path->path[len-1];
3181 }
3182
3183 static type_path_entry_t *append_to_type_path(type_path_t *path)
3184 {
3185         size_t len = ARR_LEN(path->path);
3186         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3187
3188         type_path_entry_t *result = & path->path[len];
3189         memset(result, 0, sizeof(result[0]));
3190         return result;
3191 }
3192
3193 static size_t get_compound_size(const compound_type_t *type)
3194 {
3195         declaration_t *declaration = type->declaration;
3196         declaration_t *member      = declaration->scope.declarations;
3197         size_t         size        = 0;
3198         for( ; member != NULL; member = member->next) {
3199                 ++size;
3200         }
3201         /* TODO: cache results? */
3202
3203         return size;
3204 }
3205
3206 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3207 {
3208         type_t *orig_top_type = path->top_type;
3209         type_t *top_type      = skip_typeref(orig_top_type);
3210
3211         assert(is_type_compound(top_type) || is_type_array(top_type));
3212
3213         if (ARR_LEN(path->path) == 0) {
3214                 return NULL;
3215         } else {
3216                 type_path_entry_t *top         = get_type_path_top(path);
3217                 ir_initializer_t  *initializer = top->initializer;
3218                 return get_initializer_compound_value(initializer, top->index);
3219         }
3220 }
3221
3222 static void descend_into_subtype(type_path_t *path)
3223 {
3224         type_t *orig_top_type = path->top_type;
3225         type_t *top_type      = skip_typeref(orig_top_type);
3226
3227         assert(is_type_compound(top_type) || is_type_array(top_type));
3228
3229         ir_initializer_t *initializer = get_initializer_entry(path);
3230
3231         type_path_entry_t *top = append_to_type_path(path);
3232         top->type              = top_type;
3233
3234         size_t len;
3235
3236         if (is_type_compound(top_type)) {
3237                 declaration_t *declaration = top_type->compound.declaration;
3238                 declaration_t *entry       = declaration->scope.declarations;
3239
3240                 top->compound_entry = entry;
3241                 top->index          = 0;
3242                 len                 = get_compound_size(&top_type->compound);
3243                 if (entry != NULL)
3244                         path->top_type = entry->type;
3245         } else {
3246                 assert(is_type_array(top_type));
3247                 assert(top_type->array.size > 0);
3248
3249                 top->index     = 0;
3250                 path->top_type = top_type->array.element_type;
3251                 len            = top_type->array.size;
3252         }
3253         if (initializer == NULL
3254                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3255                 initializer = create_initializer_compound(len);
3256                 /* we have to set the entry at the 2nd latest path entry... */
3257                 size_t path_len = ARR_LEN(path->path);
3258                 assert(path_len >= 1);
3259                 if (path_len > 1) {
3260                         type_path_entry_t *entry        = & path->path[path_len-2];
3261                         ir_initializer_t  *tinitializer = entry->initializer;
3262                         set_initializer_compound_value(tinitializer, entry->index,
3263                                                        initializer);
3264                 }
3265         }
3266         top->initializer = initializer;
3267 }
3268
3269 static void ascend_from_subtype(type_path_t *path)
3270 {
3271         type_path_entry_t *top = get_type_path_top(path);
3272
3273         path->top_type = top->type;
3274
3275         size_t len = ARR_LEN(path->path);
3276         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3277 }
3278
3279 static void walk_designator(type_path_t *path, const designator_t *designator)
3280 {
3281         /* designators start at current object type */
3282         ARR_RESIZE(type_path_entry_t, path->path, 1);
3283
3284         for( ; designator != NULL; designator = designator->next) {
3285                 type_path_entry_t *top         = get_type_path_top(path);
3286                 type_t            *orig_type   = top->type;
3287                 type_t            *type        = skip_typeref(orig_type);
3288
3289                 if (designator->symbol != NULL) {
3290                         assert(is_type_compound(type));
3291                         size_t    index  = 0;
3292                         symbol_t *symbol = designator->symbol;
3293
3294                         declaration_t *declaration = type->compound.declaration;
3295                         declaration_t *iter        = declaration->scope.declarations;
3296                         for( ; iter != NULL; iter = iter->next, ++index) {
3297                                 if (iter->symbol == symbol) {
3298                                         break;
3299                                 }
3300                         }
3301                         assert(iter != NULL);
3302
3303                         top->type           = orig_type;
3304                         top->compound_entry = iter;
3305                         top->index          = index;
3306                         orig_type           = iter->type;
3307                 } else {
3308                         expression_t *array_index = designator->array_index;
3309                         assert(designator->array_index != NULL);
3310                         assert(is_type_array(type));
3311                         assert(is_type_valid(array_index->base.type));
3312
3313                         long index = fold_constant(array_index);
3314                         assert(index >= 0);
3315 #ifndef NDEBUG
3316                         if (type->array.size_constant == 1) {
3317                                 long array_size = type->array.size;
3318                                 assert(index < array_size);
3319                         }
3320 #endif
3321
3322                         top->type  = orig_type;
3323                         top->index = (size_t) index;
3324                         orig_type  = type->array.element_type;
3325                 }
3326                 path->top_type = orig_type;
3327
3328                 if (designator->next != NULL) {
3329                         descend_into_subtype(path);
3330                 }
3331         }
3332
3333         path->invalid  = false;
3334 }
3335
3336 static void advance_current_object(type_path_t *path)
3337 {
3338         if (path->invalid) {
3339                 /* TODO: handle this... */
3340                 panic("invalid initializer in ast2firm (excessive elements)");
3341                 return;
3342         }
3343
3344         type_path_entry_t *top = get_type_path_top(path);
3345
3346         type_t *type = skip_typeref(top->type);
3347         if (is_type_union(type)) {
3348                 top->compound_entry = NULL;
3349         } else if (is_type_struct(type)) {
3350                 declaration_t *entry = top->compound_entry;
3351
3352                 top->index++;
3353                 entry               = entry->next;
3354                 top->compound_entry = entry;
3355                 if (entry != NULL) {
3356                         path->top_type = entry->type;
3357                         return;
3358                 }
3359         } else {
3360                 assert(is_type_array(type));
3361
3362                 top->index++;
3363                 if (!type->array.size_constant || top->index < type->array.size) {
3364                         return;
3365                 }
3366         }
3367
3368         /* we're past the last member of the current sub-aggregate, try if we
3369          * can ascend in the type hierarchy and continue with another subobject */
3370         size_t len = ARR_LEN(path->path);
3371
3372         if (len > 1) {
3373                 ascend_from_subtype(path);
3374                 advance_current_object(path);
3375         } else {
3376                 path->invalid = true;
3377         }
3378 }
3379
3380
3381 static ir_initializer_t *create_ir_initializer(
3382                 const initializer_t *initializer, type_t *type);
3383
3384 static ir_initializer_t *create_ir_initializer_value(
3385                 const initializer_value_t *initializer)
3386 {
3387         if (is_type_compound(initializer->value->base.type)) {
3388                 panic("initializer creation for compounds not implemented yet");
3389         }
3390         ir_node *value = expression_to_firm(initializer->value);
3391         return create_initializer_const(value);
3392 }
3393
3394 static ir_initializer_t *create_ir_initializer_list(
3395                 const initializer_list_t *initializer, type_t *type)
3396 {
3397         type_path_t path;
3398         memset(&path, 0, sizeof(path));
3399         path.top_type = type;
3400         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3401
3402         descend_into_subtype(&path);
3403
3404         for(size_t i = 0; i < initializer->len; ++i) {
3405                 const initializer_t *sub_initializer = initializer->initializers[i];
3406
3407                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3408                         walk_designator(&path, sub_initializer->designator.designator);
3409                         continue;
3410                 }
3411
3412                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3413                         /* we might have to descend into types until we're at a scalar
3414                          * type */
3415                         while(true) {
3416                                 type_t *orig_top_type = path.top_type;
3417                                 type_t *top_type      = skip_typeref(orig_top_type);
3418
3419                                 if (is_type_scalar(top_type))
3420                                         break;
3421                                 descend_into_subtype(&path);
3422                         }
3423                 }
3424
3425                 ir_initializer_t *sub_irinitializer
3426                         = create_ir_initializer(sub_initializer, path.top_type);
3427
3428                 size_t path_len = ARR_LEN(path.path);
3429                 assert(path_len >= 1);
3430                 type_path_entry_t *entry        = & path.path[path_len-1];
3431                 ir_initializer_t  *tinitializer = entry->initializer;
3432                 set_initializer_compound_value(tinitializer, entry->index,
3433                                                sub_irinitializer);
3434
3435                 advance_current_object(&path);
3436         }
3437
3438         assert(ARR_LEN(path.path) >= 1);
3439         ir_initializer_t *result = path.path[0].initializer;
3440         DEL_ARR_F(path.path);
3441
3442         return result;
3443 }
3444
3445 static ir_initializer_t *create_ir_initializer_string(
3446                 const initializer_string_t *initializer, type_t *type)
3447 {
3448         type = skip_typeref(type);
3449
3450         size_t            string_len    = initializer->string.size;
3451         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3452         size_t            len           = type->array.size;
3453         ir_initializer_t *irinitializer = create_initializer_compound(len);
3454
3455         const char *string = initializer->string.begin;
3456         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3457
3458         for(size_t i = 0; i < len; ++i) {
3459                 char c = 0;
3460                 if (i < string_len)
3461                         c = string[i];
3462
3463                 tarval           *tv = new_tarval_from_long(c, mode);
3464                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3465
3466                 set_initializer_compound_value(irinitializer, i, char_initializer);
3467         }
3468
3469         return irinitializer;
3470 }
3471
3472 static ir_initializer_t *create_ir_initializer_wide_string(
3473                 const initializer_wide_string_t *initializer, type_t *type)
3474 {
3475         size_t            string_len    = initializer->string.size;
3476         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3477         size_t            len           = type->array.size;
3478         ir_initializer_t *irinitializer = create_initializer_compound(len);
3479
3480         const wchar_rep_t *string = initializer->string.begin;
3481         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3482
3483         for(size_t i = 0; i < len; ++i) {
3484                 wchar_rep_t c = 0;
3485                 if (i < string_len) {
3486                         c = string[i];
3487                 }
3488                 tarval *tv = new_tarval_from_long(c, mode);
3489                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3490
3491                 set_initializer_compound_value(irinitializer, i, char_initializer);
3492         }
3493
3494         return irinitializer;
3495 }
3496
3497 static ir_initializer_t *create_ir_initializer(
3498                 const initializer_t *initializer, type_t *type)
3499 {
3500         switch(initializer->kind) {
3501                 case INITIALIZER_STRING:
3502                         return create_ir_initializer_string(&initializer->string, type);
3503
3504                 case INITIALIZER_WIDE_STRING:
3505                         return create_ir_initializer_wide_string(&initializer->wide_string,
3506                                                                  type);
3507
3508                 case INITIALIZER_LIST:
3509                         return create_ir_initializer_list(&initializer->list, type);
3510
3511                 case INITIALIZER_VALUE:
3512                         return create_ir_initializer_value(&initializer->value);
3513
3514                 case INITIALIZER_DESIGNATOR:
3515                         panic("unexpected designator initializer found");
3516         }
3517         panic("unknown initializer");
3518 }
3519
3520 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3521                 ir_node *base_addr)
3522 {
3523         if (is_atomic_type(type)) {
3524                 ir_mode *mode = get_type_mode(type);
3525                 tarval  *zero = get_mode_null(mode);
3526                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3527
3528                 /* TODO: bitfields */
3529                 ir_node *mem    = get_store();
3530                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3531                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3532                 set_store(proj_m);
3533         } else {
3534                 assert(is_compound_type(type));
3535
3536                 int n_members;
3537                 if (is_Array_type(type)) {
3538                         assert(has_array_upper_bound(type, 0));
3539                         n_members = get_array_upper_bound_int(type, 0);
3540                 } else {
3541                         n_members = get_compound_n_members(type);
3542                 }
3543
3544                 for(int i = 0; i < n_members; ++i) {
3545                         ir_node *addr;
3546                         ir_type *irtype;
3547                         if (is_Array_type(type)) {
3548                                 ir_entity *entity   = get_array_element_entity(type);
3549                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3550                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3551                                 ir_node   *in[1]    = { cnst };
3552                                 irtype = get_array_element_type(type);
3553                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3554                         } else {
3555                                 ir_entity *member = get_compound_member(type, i);
3556
3557                                 irtype = get_entity_type(member);
3558                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3559                         }
3560
3561                         create_dynamic_null_initializer(irtype, dbgi, addr);
3562                 }
3563         }
3564 }
3565
3566 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3567                 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3568 {
3569         switch(get_initializer_kind(initializer)) {
3570         case IR_INITIALIZER_NULL: {
3571                 create_dynamic_null_initializer(type, dbgi, base_addr);
3572                 return;
3573         }
3574         case IR_INITIALIZER_CONST: {
3575                 ir_node *node = get_initializer_const_value(initializer);
3576                 ir_mode *mode = get_irn_mode(node);
3577                 assert(get_type_mode(type) == mode);
3578
3579                 /* TODO: bitfields... */
3580                 ir_node *mem    = get_store();
3581                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3582                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3583                 set_store(proj_m);
3584                 return;
3585         }
3586         case IR_INITIALIZER_TARVAL: {
3587                 tarval  *tv   = get_initializer_tarval_value(initializer);
3588                 ir_mode *mode = get_tarval_mode(tv);
3589                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3590                 assert(get_type_mode(type) == mode);
3591
3592                 /* TODO: bitfields... */
3593                 ir_node *mem    = get_store();
3594                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3595                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3596                 set_store(proj_m);
3597                 return;
3598         }
3599         case IR_INITIALIZER_COMPOUND: {
3600                 assert(is_compound_type(type));
3601                 int n_members;
3602                 if (is_Array_type(type)) {
3603                         assert(has_array_upper_bound(type, 0));
3604                         n_members = get_array_upper_bound_int(type, 0);
3605                 } else {
3606                         n_members = get_compound_n_members(type);
3607                 }
3608
3609                 if (get_initializer_compound_n_entries(initializer)
3610                                 != (unsigned) n_members)
3611                         panic("initializer doesn't match compound type");
3612
3613                 for(int i = 0; i < n_members; ++i) {
3614                         ir_node *addr;
3615                         ir_type *irtype;
3616                         if (is_Array_type(type)) {
3617                                 ir_entity *entity   = get_array_element_entity(type);
3618                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3619                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3620                                 ir_node   *in[1]    = { cnst };
3621                                 irtype = get_array_element_type(type);
3622                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3623                         } else {
3624                                 ir_entity *member = get_compound_member(type, i);
3625
3626                                 irtype = get_entity_type(member);
3627                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3628                         }
3629
3630                         ir_initializer_t *sub_init
3631                                 = get_initializer_compound_value(initializer, i);
3632
3633                         create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3634                 }
3635                 return;
3636         }
3637         }
3638
3639         panic("invalid IR_INITIALIZER found");
3640 }
3641
3642 static void create_dynamic_initializer(ir_initializer_t *initializer,
3643                 dbg_info *dbgi, ir_entity *entity)
3644 {
3645         ir_node *frame     = get_local_frame(entity);
3646         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3647         ir_type *type      = get_entity_type(entity);
3648
3649         create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3650 }
3651
3652 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3653                                      ir_entity *entity, type_t *type)
3654 {
3655         ir_node *memory = get_store();
3656         ir_node *nomem  = new_NoMem();
3657         ir_node *frame  = get_irg_frame(current_ir_graph);
3658         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3659
3660         if (initializer->kind == INITIALIZER_VALUE) {
3661                 initializer_value_t *initializer_value = &initializer->value;
3662
3663                 ir_node *value = expression_to_firm(initializer_value->value);
3664                 type = skip_typeref(type);
3665                 assign_value(dbgi, addr, type, value);
3666                 return;
3667         }
3668
3669         if (!is_constant_initializer(initializer)) {
3670                 ir_initializer_t *irinitializer
3671                         = create_ir_initializer(initializer, type);
3672
3673                 create_dynamic_initializer(irinitializer, dbgi, entity);
3674                 return;
3675         }
3676
3677         /* create the ir_initializer */
3678         ir_graph *const old_current_ir_graph = current_ir_graph;
3679         current_ir_graph = get_const_code_irg();
3680
3681         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3682
3683         assert(current_ir_graph == get_const_code_irg());
3684         current_ir_graph = old_current_ir_graph;
3685
3686         /* create a "template" entity which is copied to the entity on the stack */
3687         ident     *const id          = id_unique("initializer.%u");
3688         ir_type   *const irtype      = get_ir_type(type);
3689         ir_type   *const global_type = get_glob_type();
3690         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3691         set_entity_ld_ident(init_entity, id);
3692
3693         set_entity_variability(init_entity, variability_initialized);
3694         set_entity_visibility(init_entity, visibility_local);
3695         set_entity_allocation(init_entity, allocation_static);
3696
3697         set_entity_initializer(init_entity, irinitializer);
3698
3699         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3700         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3701
3702         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3703         set_store(copyb_mem);
3704 }
3705
3706 static void create_initializer_local_variable_entity(declaration_t *declaration)
3707 {
3708         initializer_t *initializer = declaration->init.initializer;
3709         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3710         ir_entity     *entity      = declaration->v.entity;
3711         type_t        *type        = declaration->type;
3712         create_local_initializer(initializer, dbgi, entity, type);
3713 }
3714
3715 static void create_declaration_initializer(declaration_t *declaration)
3716 {
3717         initializer_t *initializer = declaration->init.initializer;
3718         if (initializer == NULL)
3719                 return;
3720
3721         declaration_kind_t declaration_kind
3722                 = (declaration_kind_t) declaration->declaration_kind;
3723         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3724                 create_initializer_local_variable_entity(declaration);
3725                 return;
3726         }
3727
3728         type_t *type = skip_typeref(declaration->type);
3729
3730         if (initializer->kind == INITIALIZER_VALUE) {
3731                 initializer_value_t *initializer_value = &initializer->value;
3732                 dbg_info            *dbgi
3733                         = get_dbg_info(&declaration->source_position);
3734
3735                 ir_node *value = expression_to_firm(initializer_value->value);
3736                 value = do_strict_conv(dbgi, value);
3737
3738                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3739                         set_value(declaration->v.value_number, value);
3740                 } else {
3741                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3742
3743                         ir_entity *entity = declaration->v.entity;
3744
3745                         if (type->base.qualifiers & TYPE_QUALIFIER_CONST) {
3746                                 set_entity_variability(entity, variability_constant);
3747                         } else {
3748                                 set_entity_variability(entity, variability_initialized);
3749                         }
3750                         set_atomic_ent_value(entity, value);
3751                 }
3752         } else {
3753                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3754                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3755
3756                 ir_entity        *entity        = declaration->v.entity;
3757                 ir_initializer_t *irinitializer
3758                         = create_ir_initializer(initializer, type);
3759
3760                 if (type->base.qualifiers & TYPE_QUALIFIER_CONST) {
3761                         set_entity_variability(entity, variability_constant);
3762                 } else {
3763                         set_entity_variability(entity, variability_initialized);
3764                 }
3765                 set_entity_initializer(entity, irinitializer);
3766         }
3767 }
3768
3769 static void create_variable_length_array(declaration_t *declaration)
3770 {
3771         /* initializers are not allowed for VLAs */
3772         assert(declaration->init.initializer == NULL);
3773
3774         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3775         declaration->v.vla_base       = NULL;
3776
3777         /* TODO: record VLA somewhere so we create the free node when we leave
3778          * it's scope */
3779 }
3780
3781 static void allocate_variable_length_array(declaration_t *declaration)
3782 {
3783         /* initializers are not allowed for VLAs */
3784         assert(declaration->init.initializer == NULL);
3785         assert(get_cur_block() != NULL);
3786
3787         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3788         type_t   *type      = declaration->type;
3789         ir_type  *el_type   = get_ir_type(type->array.element_type);
3790
3791         /* make sure size_node is calculated */
3792         get_type_size(type);
3793         ir_node  *elems = type->array.size_node;
3794         ir_node  *mem   = get_store();
3795         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3796
3797         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3798         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3799         set_store(proj_m);
3800
3801         assert(declaration->declaration_kind
3802                         == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3803         declaration->v.vla_base       = addr;
3804 }
3805
3806 /**
3807  * Creates a Firm local variable from a declaration.
3808  */
3809 static void create_local_variable(declaration_t *declaration)
3810 {
3811         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3812
3813         bool needs_entity = declaration->address_taken;
3814         type_t *type = skip_typeref(declaration->type);
3815
3816         /* is it a variable length array? */
3817         if (is_type_array(type) && !type->array.size_constant) {
3818                 create_variable_length_array(declaration);
3819                 return;
3820         } else if (is_type_array(type) || is_type_compound(type)) {
3821                 needs_entity = true;
3822         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3823                 needs_entity = true;
3824         }
3825
3826         if (needs_entity) {
3827                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3828                 create_declaration_entity(declaration,
3829                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3830                                           frame_type);
3831         } else {
3832                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3833                 declaration->v.value_number   = next_value_number_function;
3834                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3835                 ++next_value_number_function;
3836         }
3837 }
3838
3839 static void create_local_static_variable(declaration_t *declaration)
3840 {
3841         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3842
3843         type_t    *const type        = skip_typeref(declaration->type);
3844         ir_type   *const global_type = get_glob_type();
3845         ir_type   *const irtype      = get_ir_type(type);
3846         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3847
3848         size_t l = strlen(declaration->symbol->string);
3849         char   buf[l + sizeof(".%u")];
3850         snprintf(buf, sizeof(buf), "%s.%%u", declaration->symbol->string);
3851         ident     *const id = id_unique(buf);
3852
3853         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3854
3855         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3856                 set_entity_volatility(entity, volatility_is_volatile);
3857         }
3858
3859         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3860         declaration->v.entity         = entity;
3861         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3862         set_entity_variability(entity, variability_uninitialized);
3863         set_entity_visibility(entity, visibility_local);
3864         set_entity_allocation(entity, allocation_static);
3865
3866         ir_graph *const old_current_ir_graph = current_ir_graph;
3867         current_ir_graph = get_const_code_irg();
3868
3869         create_declaration_initializer(declaration);
3870
3871         assert(current_ir_graph == get_const_code_irg());
3872         current_ir_graph = old_current_ir_graph;
3873 }
3874
3875
3876
3877 static void return_statement_to_firm(return_statement_t *statement)
3878 {
3879         if (get_cur_block() == NULL)
3880                 return;
3881
3882         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3883         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3884
3885
3886         ir_node *in[1];
3887         int      in_len;
3888         if (get_method_n_ress(func_irtype) > 0) {
3889                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3890
3891                 if (statement->value != NULL) {
3892                         ir_node *node = expression_to_firm(statement->value);
3893                         node  = do_strict_conv(dbgi, node);
3894                         in[0] = node;
3895                 } else {
3896                         ir_mode *mode;
3897                         if (is_compound_type(res_type)) {
3898                                 mode = mode_P_data;
3899                         } else {
3900                                 mode = get_type_mode(res_type);
3901                         }
3902                         in[0] = new_Unknown(mode);
3903                 }
3904                 in_len = 1;
3905         } else {
3906                 /* build return_value for its side effects */
3907                 if (statement->value != NULL) {
3908                         expression_to_firm(statement->value);
3909                 }
3910                 in_len = 0;
3911         }
3912
3913         ir_node  *store = get_store();
3914         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
3915
3916         ir_node *end_block = get_irg_end_block(current_ir_graph);
3917         add_immBlock_pred(end_block, ret);
3918
3919         set_cur_block(NULL);
3920 }
3921
3922 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3923 {
3924         if (get_cur_block() == NULL)
3925                 return NULL;
3926
3927         return expression_to_firm(statement->expression);
3928 }
3929
3930 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3931 {
3932         declaration_t *declaration = compound->scope.declarations;
3933         for( ; declaration != NULL; declaration = declaration->next) {
3934                 create_local_declaration(declaration);
3935         }
3936
3937         ir_node     *result    = NULL;
3938         statement_t *statement = compound->statements;
3939         for( ; statement != NULL; statement = statement->base.next) {
3940                 if (statement->base.next == NULL
3941                                 && statement->kind == STATEMENT_EXPRESSION) {
3942                         result = expression_statement_to_firm(
3943                                         &statement->expression);
3944                         break;
3945                 }
3946                 statement_to_firm(statement);
3947         }
3948
3949         return result;
3950 }
3951
3952 static void create_global_variable(declaration_t *declaration)
3953 {
3954         ir_visibility  vis;
3955         ir_type       *var_type;
3956         switch ((storage_class_tag_t)declaration->storage_class) {
3957                 case STORAGE_CLASS_STATIC:
3958                         vis = visibility_local;
3959                         goto global_var;
3960
3961                 case STORAGE_CLASS_EXTERN:
3962                         vis = visibility_external_allocated;
3963                         goto global_var;
3964
3965                 case STORAGE_CLASS_NONE:
3966                         vis = visibility_external_visible;
3967                         goto global_var;
3968
3969                 case STORAGE_CLASS_THREAD:
3970                         vis = visibility_external_visible;
3971                         goto tls_var;
3972
3973                 case STORAGE_CLASS_THREAD_EXTERN:
3974                         vis = visibility_external_allocated;
3975                         goto tls_var;
3976
3977                 case STORAGE_CLASS_THREAD_STATIC:
3978                         vis = visibility_local;
3979                         goto tls_var;
3980
3981 tls_var:
3982                         var_type = get_tls_type();
3983                         goto create_var;
3984
3985 global_var:
3986                         var_type = get_glob_type();
3987                         goto create_var;
3988
3989 create_var:
3990                         create_declaration_entity(declaration,
3991                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
3992                                                   var_type);
3993                         if (!is_type_function(skip_typeref(declaration->type))) {
3994                                 set_entity_visibility(declaration->v.entity, vis);
3995                         }
3996
3997                         return;
3998
3999                 case STORAGE_CLASS_TYPEDEF:
4000                 case STORAGE_CLASS_AUTO:
4001                 case STORAGE_CLASS_REGISTER:
4002                 case STORAGE_CLASS_ENUM_ENTRY:
4003                         break;
4004         }
4005         panic("Invalid storage class for global variable");
4006 }
4007
4008 static void create_local_declaration(declaration_t *declaration)
4009 {
4010         if (declaration->namespc != NAMESPACE_NORMAL)
4011                 return;
4012         /* construct type */
4013         (void) get_ir_type(declaration->type);
4014         if (declaration->symbol == NULL) {
4015                 return;
4016         }
4017
4018         type_t *type = skip_typeref(declaration->type);
4019
4020         switch ((storage_class_tag_t) declaration->storage_class) {
4021         case STORAGE_CLASS_STATIC:
4022                 create_local_static_variable(declaration);
4023                 return;
4024         case STORAGE_CLASS_EXTERN:
4025                 create_global_variable(declaration);
4026                 create_declaration_initializer(declaration);
4027                 return;
4028         case STORAGE_CLASS_NONE:
4029         case STORAGE_CLASS_AUTO:
4030         case STORAGE_CLASS_REGISTER:
4031                 if (is_type_function(type)) {
4032                         if (declaration->init.statement != NULL) {
4033                                 panic("nested functions not supported yet");
4034                         } else {
4035                                 get_function_entity(declaration);
4036                         }
4037                 } else {
4038                         create_local_variable(declaration);
4039                 }
4040                 return;
4041         case STORAGE_CLASS_ENUM_ENTRY:
4042                 /* should already be handled */
4043                 assert(declaration->declaration_kind == DECLARATION_KIND_ENUM_ENTRY);
4044                 return;
4045         case STORAGE_CLASS_TYPEDEF:
4046                 declaration->declaration_kind = DECLARATION_KIND_TYPE;
4047                 return;
4048         case STORAGE_CLASS_THREAD:
4049         case STORAGE_CLASS_THREAD_EXTERN:
4050         case STORAGE_CLASS_THREAD_STATIC:
4051                 break;
4052         }
4053         panic("invalid storage class found");
4054 }
4055
4056 static void initialize_local_declaration(declaration_t *declaration)
4057 {
4058         if (declaration->symbol == NULL || declaration->namespc != NAMESPACE_NORMAL)
4059                 return;
4060
4061         switch ((declaration_kind_t) declaration->declaration_kind) {
4062         case DECLARATION_KIND_LOCAL_VARIABLE:
4063         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4064                 create_declaration_initializer(declaration);
4065                 return;
4066
4067         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4068                 allocate_variable_length_array(declaration);
4069                 return;
4070
4071         case DECLARATION_KIND_LABEL_BLOCK:
4072         case DECLARATION_KIND_COMPOUND_MEMBER:
4073         case DECLARATION_KIND_GLOBAL_VARIABLE:
4074         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
4075         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
4076         case DECLARATION_KIND_FUNCTION:
4077         case DECLARATION_KIND_TYPE:
4078         case DECLARATION_KIND_ENUM_ENTRY:
4079                 return;
4080
4081         case DECLARATION_KIND_UNKNOWN:
4082                 panic("can't initialize unknwon declaration");
4083         }
4084         panic("invalid declaration kind");
4085 }
4086
4087 static void declaration_statement_to_firm(declaration_statement_t *statement)
4088 {
4089         declaration_t *declaration = statement->declarations_begin;
4090         declaration_t *end         = statement->declarations_end->next;
4091         for( ; declaration != end; declaration = declaration->next) {
4092                 if (declaration->namespc != NAMESPACE_NORMAL)
4093                         continue;
4094                 initialize_local_declaration(declaration);
4095         }
4096 }
4097
4098 static void if_statement_to_firm(if_statement_t *statement)
4099 {
4100         ir_node *cur_block = get_cur_block();
4101
4102         ir_node *fallthrough_block = NULL;
4103
4104         /* the true (blocks) */
4105         ir_node *true_block = NULL;
4106         if (statement->true_statement != NULL) {
4107                 true_block = new_immBlock();
4108                 statement_to_firm(statement->true_statement);
4109                 if (get_cur_block() != NULL) {
4110                         ir_node *jmp = new_Jmp();
4111                         if (fallthrough_block == NULL)
4112                                 fallthrough_block = new_immBlock();
4113                         add_immBlock_pred(fallthrough_block, jmp);
4114                 }
4115         }
4116
4117         /* the false (blocks) */
4118         ir_node *false_block = NULL;
4119         if (statement->false_statement != NULL) {
4120                 false_block = new_immBlock();
4121
4122                 statement_to_firm(statement->false_statement);
4123                 if (get_cur_block() != NULL) {
4124                         ir_node *jmp = new_Jmp();
4125                         if (fallthrough_block == NULL)
4126                                 fallthrough_block = new_immBlock();
4127                         add_immBlock_pred(fallthrough_block, jmp);
4128                 }
4129         }
4130
4131         /* create the condition */
4132         if (cur_block != NULL) {
4133                 if (true_block == NULL || false_block == NULL) {
4134                         if (fallthrough_block == NULL)
4135                                 fallthrough_block = new_immBlock();
4136                         if (true_block == NULL)
4137                                 true_block = fallthrough_block;
4138                         if (false_block == NULL)
4139                                 false_block = fallthrough_block;
4140                 }
4141
4142                 set_cur_block(cur_block);
4143                 create_condition_evaluation(statement->condition, true_block,
4144                                             false_block);
4145         }
4146
4147         mature_immBlock(true_block);
4148         if (false_block != fallthrough_block) {
4149                 mature_immBlock(false_block);
4150         }
4151         if (fallthrough_block != NULL) {
4152                 mature_immBlock(fallthrough_block);
4153         }
4154
4155         set_cur_block(fallthrough_block);
4156 }
4157
4158 static void while_statement_to_firm(while_statement_t *statement)
4159 {
4160         ir_node *jmp = NULL;
4161         if (get_cur_block() != NULL) {
4162                 jmp = new_Jmp();
4163         }
4164
4165         /* create the header block */
4166         ir_node *header_block = new_immBlock();
4167         if (jmp != NULL) {
4168                 add_immBlock_pred(header_block, jmp);
4169         }
4170
4171         /* the loop body */
4172         ir_node *old_continue_label = continue_label;
4173         ir_node *old_break_label    = break_label;
4174         continue_label              = header_block;
4175         break_label                 = NULL;
4176
4177         ir_node *body_block = new_immBlock();
4178         statement_to_firm(statement->body);
4179         ir_node *false_block = break_label;
4180
4181         assert(continue_label == header_block);
4182         continue_label = old_continue_label;
4183         break_label    = old_break_label;
4184
4185         if (get_cur_block() != NULL) {
4186                 jmp = new_Jmp();
4187                 add_immBlock_pred(header_block, jmp);
4188         }
4189
4190         /* shortcut for while(true) */
4191         if (is_constant_expression(statement->condition)
4192                         && fold_constant(statement->condition) != 0) {
4193                 set_cur_block(header_block);
4194                 ir_node *header_jmp = new_Jmp();
4195                 add_immBlock_pred(body_block, header_jmp);
4196
4197                 keep_alive(body_block);
4198         } else {
4199                 if (false_block == NULL) {
4200                         false_block = new_immBlock();
4201                 }
4202
4203                 /* create the condition */
4204                 set_cur_block(header_block);
4205
4206                 create_condition_evaluation(statement->condition, body_block,
4207                                             false_block);
4208         }
4209
4210         mature_immBlock(body_block);
4211         mature_immBlock(header_block);
4212         if (false_block != NULL) {
4213                 mature_immBlock(false_block);
4214         }
4215
4216         set_cur_block(false_block);
4217 }
4218
4219 static void do_while_statement_to_firm(do_while_statement_t *statement)
4220 {
4221         ir_node *jmp = NULL;
4222         if (get_cur_block() != NULL) {
4223                 jmp = new_Jmp();
4224         }
4225
4226         /* create the header block */
4227         ir_node *header_block = new_immBlock();
4228
4229         /* the loop body */
4230         ir_node *body_block = new_immBlock();
4231         if (jmp != NULL) {
4232                 add_immBlock_pred(body_block, jmp);
4233         }
4234
4235         ir_node *old_continue_label = continue_label;
4236         ir_node *old_break_label    = break_label;
4237         continue_label              = header_block;
4238         break_label                 = NULL;
4239
4240         statement_to_firm(statement->body);
4241         ir_node *false_block = break_label;
4242
4243         assert(continue_label == header_block);
4244         continue_label = old_continue_label;
4245         break_label    = old_break_label;
4246
4247         if (get_cur_block() != NULL) {
4248                 ir_node *body_jmp = new_Jmp();
4249                 add_immBlock_pred(header_block, body_jmp);
4250                 mature_immBlock(header_block);
4251         }
4252
4253         if (false_block == NULL) {
4254                 false_block = new_immBlock();
4255         }
4256
4257         /* create the condition */
4258         set_cur_block(header_block);
4259
4260         create_condition_evaluation(statement->condition, body_block, false_block);
4261         mature_immBlock(body_block);
4262         mature_immBlock(header_block);
4263         if (false_block != NULL) {
4264                 mature_immBlock(false_block);
4265         }
4266
4267         set_cur_block(false_block);
4268 }
4269
4270 static void for_statement_to_firm(for_statement_t *statement)
4271 {
4272         ir_node *jmp = NULL;
4273
4274         /* create declarations */
4275         declaration_t *declaration = statement->scope.declarations;
4276         for( ; declaration != NULL; declaration = declaration->next) {
4277                 create_local_declaration(declaration);
4278         }
4279         declaration = statement->scope.declarations;
4280         for( ; declaration != NULL; declaration = declaration->next) {
4281                 initialize_local_declaration(declaration);
4282         }
4283
4284         if (get_cur_block() != NULL) {
4285                 if (statement->initialisation != NULL) {
4286                         expression_to_firm(statement->initialisation);
4287                 }
4288
4289                 jmp = new_Jmp();
4290         }
4291
4292
4293         /* create the step block */
4294         ir_node *const step_block = new_immBlock();
4295         if (statement->step != NULL) {
4296                 expression_to_firm(statement->step);
4297         }
4298         ir_node *const step_jmp = new_Jmp();
4299
4300         /* create the header block */
4301         ir_node *const header_block = new_immBlock();
4302         if (jmp != NULL) {
4303                 add_immBlock_pred(header_block, jmp);
4304         }
4305         add_immBlock_pred(header_block, step_jmp);
4306
4307         /* the false block */
4308         ir_node *const false_block = new_immBlock();
4309
4310         /* the loop body */
4311         ir_node * body_block;
4312         if (statement->body != NULL) {
4313                 ir_node *const old_continue_label = continue_label;
4314                 ir_node *const old_break_label    = break_label;
4315                 continue_label = step_block;
4316                 break_label    = false_block;
4317
4318                 body_block = new_immBlock();
4319                 statement_to_firm(statement->body);
4320
4321                 assert(continue_label == step_block);
4322                 assert(break_label    == false_block);
4323                 continue_label = old_continue_label;
4324                 break_label    = old_break_label;
4325
4326                 if (get_cur_block() != NULL) {
4327                         jmp = new_Jmp();
4328                         add_immBlock_pred(step_block, jmp);
4329                 }
4330         } else {
4331                 body_block = step_block;
4332         }
4333
4334         /* create the condition */
4335         set_cur_block(header_block);
4336         if (statement->condition != NULL) {
4337                 create_condition_evaluation(statement->condition, body_block,
4338                                             false_block);
4339         } else {
4340                 keep_alive(header_block);
4341                 jmp = new_Jmp();
4342                 add_immBlock_pred(body_block, jmp);
4343         }
4344
4345         mature_immBlock(body_block);
4346         mature_immBlock(false_block);
4347         mature_immBlock(step_block);
4348         mature_immBlock(header_block);
4349         mature_immBlock(false_block);
4350
4351         set_cur_block(false_block);
4352 }
4353
4354 static void create_jump_statement(const statement_t *statement,
4355                                   ir_node *target_block)
4356 {
4357         if (get_cur_block() == NULL)
4358                 return;
4359
4360         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4361         ir_node  *jump = new_d_Jmp(dbgi);
4362         add_immBlock_pred(target_block, jump);
4363
4364         set_cur_block(NULL);
4365 }
4366
4367 static ir_node *get_break_label(void)
4368 {
4369         if (break_label == NULL) {
4370                 ir_node *cur_block = get_cur_block();
4371                 break_label = new_immBlock();
4372                 set_cur_block(cur_block);
4373         }
4374         return break_label;
4375 }
4376
4377 static void switch_statement_to_firm(const switch_statement_t *statement)
4378 {
4379         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4380
4381         ir_node *expression  = expression_to_firm(statement->expression);
4382         ir_node *cond        = new_d_Cond(dbgi, expression);
4383
4384         set_cur_block(NULL);
4385
4386         ir_node *const old_switch_cond       = current_switch_cond;
4387         ir_node *const old_break_label       = break_label;
4388         const bool     old_saw_default_label = saw_default_label;
4389         saw_default_label                    = false;
4390         current_switch_cond                  = cond;
4391         break_label                          = NULL;
4392
4393         if (statement->body != NULL) {
4394                 statement_to_firm(statement->body);
4395         }
4396
4397         if (get_cur_block() != NULL) {
4398                 ir_node *jmp = new_Jmp();
4399                 add_immBlock_pred(get_break_label(), jmp);
4400         }
4401
4402         if (!saw_default_label) {
4403                 set_cur_block(get_nodes_block(cond));
4404                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4405                                                         MAGIC_DEFAULT_PN_NUMBER);
4406                 add_immBlock_pred(get_break_label(), proj);
4407         }
4408
4409         if (break_label != NULL) {
4410                 mature_immBlock(break_label);
4411         }
4412         set_cur_block(break_label);
4413
4414         assert(current_switch_cond == cond);
4415         current_switch_cond = old_switch_cond;
4416         break_label         = old_break_label;
4417         saw_default_label   = old_saw_default_label;
4418 }
4419
4420 static void case_label_to_firm(const case_label_statement_t *statement)
4421 {
4422         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4423
4424         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4425
4426         /* let's create a node and hope firm constant folding creates a Const
4427          * node... */
4428         ir_node *proj;
4429         ir_node *old_block = get_nodes_block(current_switch_cond);
4430         ir_node *block     = new_immBlock();
4431
4432         set_cur_block(old_block);
4433         if (statement->expression != NULL) {
4434                 long start_pn = fold_constant(statement->expression);
4435                 long end_pn = start_pn;
4436                 if (statement->end_range != NULL) {
4437                         end_pn = fold_constant(statement->end_range);
4438                 }
4439                 assert(start_pn <= end_pn);
4440                 /* create jumps for all cases in the given range */
4441                 for (long pn = start_pn; pn <= end_pn; ++pn) {
4442                         if (pn == MAGIC_DEFAULT_PN_NUMBER) {
4443                                 /* oops someone detected our cheating... */
4444                                 panic("magic default pn used");
4445                         }
4446                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4447                         add_immBlock_pred(block, proj);
4448                 }
4449         } else {
4450                 saw_default_label = true;
4451                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4452                                          MAGIC_DEFAULT_PN_NUMBER);
4453
4454                 add_immBlock_pred(block, proj);
4455         }
4456
4457         if (fallthrough != NULL) {
4458                 add_immBlock_pred(block, fallthrough);
4459         }
4460         mature_immBlock(block);
4461         set_cur_block(block);
4462
4463         if (statement->statement != NULL) {
4464                 statement_to_firm(statement->statement);
4465         }
4466 }
4467
4468 static ir_node *get_label_block(declaration_t *label)
4469 {
4470         assert(label->namespc == NAMESPACE_LABEL);
4471
4472         if (label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
4473                 return label->v.block;
4474         }
4475         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
4476
4477         ir_node *old_cur_block = get_cur_block();
4478         ir_node *block         = new_immBlock();
4479         set_cur_block(old_cur_block);
4480
4481         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
4482         label->v.block          = block;
4483
4484         ARR_APP1(ir_node *, imature_blocks, block);
4485
4486         return block;
4487 }
4488
4489 static void label_to_firm(const label_statement_t *statement)
4490 {
4491         ir_node *block = get_label_block(statement->label);
4492
4493         if (get_cur_block() != NULL) {
4494                 ir_node *jmp = new_Jmp();
4495                 add_immBlock_pred(block, jmp);
4496         }
4497
4498         set_cur_block(block);
4499         keep_alive(block);
4500
4501         if (statement->statement != NULL) {
4502                 statement_to_firm(statement->statement);
4503         }
4504 }
4505
4506 static void goto_to_firm(const goto_statement_t *statement)
4507 {
4508         if (get_cur_block() == NULL)
4509                 return;
4510
4511         ir_node *block = get_label_block(statement->label);
4512         ir_node *jmp   = new_Jmp();
4513         add_immBlock_pred(block, jmp);
4514
4515         set_cur_block(NULL);
4516 }
4517
4518 static void asm_statement_to_firm(const asm_statement_t *statement)
4519 {
4520         bool needs_memory = false;
4521
4522         if (statement->is_volatile) {
4523                 needs_memory = true;
4524         }
4525
4526         size_t         n_clobbers = 0;
4527         asm_clobber_t *clobber    = statement->clobbers;
4528         for( ; clobber != NULL; clobber = clobber->next) {
4529                 const char *clobber_str = clobber->clobber.begin;
4530
4531                 if (!be_is_valid_clobber(clobber_str)) {
4532                         errorf(&statement->base.source_position,
4533                                    "invalid clobber '%s' specified", clobber->clobber);
4534                         continue;
4535                 }
4536
4537                 if (strcmp(clobber_str, "memory") == 0) {
4538                         needs_memory = true;
4539                         continue;
4540                 }
4541
4542                 ident *id = new_id_from_str(clobber_str);
4543                 obstack_ptr_grow(&asm_obst, id);
4544                 ++n_clobbers;
4545         }
4546         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4547         ident **clobbers = NULL;
4548         if (n_clobbers > 0) {
4549                 clobbers = obstack_finish(&asm_obst);
4550         }
4551
4552         size_t n_inputs  = 0;
4553         asm_argument_t *argument = statement->inputs;
4554         for ( ; argument != NULL; argument = argument->next)
4555                 n_inputs++;
4556         size_t n_outputs = 0;
4557         argument = statement->outputs;
4558         for ( ; argument != NULL; argument = argument->next)
4559                 n_outputs++;
4560
4561         unsigned next_pos = 0;
4562
4563         ir_node *ins[n_inputs + n_outputs + 1];
4564         size_t   in_size = 0;
4565
4566         ir_asm_constraint *tmp_in_constraints
4567                 = xmalloc(n_outputs * sizeof(tmp_in_constraints[0]));
4568
4569         const expression_t *out_exprs[n_outputs];
4570         ir_node            *out_addrs[n_outputs];
4571         size_t              out_size = 0;
4572
4573         argument = statement->outputs;
4574         for ( ; argument != NULL; argument = argument->next) {
4575                 const char *constraints = argument->constraints.begin;
4576                 asm_constraint_flags_t asm_flags
4577                         = be_parse_asm_constraints(constraints);
4578
4579                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4580                         errorf(&statement->base.source_position,
4581                                "some constraints in '%s' are not supported", constraints);
4582                         continue;
4583                 }
4584                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4585                         errorf(&statement->base.source_position,
4586                                "some constraints in '%s' are invalid", constraints);
4587                         continue;
4588                 }
4589                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4590                         errorf(&statement->base.source_position,
4591                                "no write flag specified for output constraints '%s'",
4592                                constraints);
4593                         continue;
4594                 }
4595
4596                 unsigned pos = next_pos++;
4597                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4598                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4599                         expression_t *expr = argument->expression;
4600                         ir_node      *addr = expression_to_addr(expr);
4601                         /* in+output, construct an artifical same_as constraint on the
4602                          * input */
4603                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4604                                 char     buf[64];
4605                                 ir_node *value = get_value_from_lvalue(expr, addr);
4606
4607                                 snprintf(buf, sizeof(buf), "%d", pos);
4608
4609                                 ir_asm_constraint constraint;
4610                                 constraint.pos              = pos;
4611                                 constraint.constraint       = new_id_from_str(buf);
4612                                 constraint.mode             = get_ir_mode(expr->base.type);
4613                                 tmp_in_constraints[in_size] = constraint;
4614                                 ins[in_size] = value;
4615
4616                                 ++in_size;
4617                         }
4618
4619                         out_exprs[out_size] = expr;
4620                         out_addrs[out_size] = addr;
4621                         ++out_size;
4622                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4623                         /* pure memory ops need no input (but we have to make sure we
4624                          * attach to the memory) */
4625                         assert(! (asm_flags &
4626                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4627                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4628                         needs_memory = true;
4629
4630                         /* we need to attach the address to the inputs */
4631                         expression_t *expr = argument->expression;
4632
4633                         ir_asm_constraint constraint;
4634                         constraint.pos              = pos;
4635                         constraint.constraint       = new_id_from_str(constraints);
4636                         constraint.mode             = NULL;
4637                         tmp_in_constraints[in_size] = constraint;
4638
4639                         ins[in_size]          = expression_to_addr(expr);
4640                         ++in_size;
4641                         continue;
4642                 } else {
4643                         errorf(&statement->base.source_position,
4644                                "only modifiers but no place set in constraints '%s'",
4645                                constraints);
4646                         continue;
4647                 }
4648
4649                 ir_asm_constraint constraint;
4650                 constraint.pos        = pos;
4651                 constraint.constraint = new_id_from_str(constraints);
4652                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4653
4654                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4655         }
4656         assert(obstack_object_size(&asm_obst)
4657                         == out_size * sizeof(ir_asm_constraint));
4658         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4659
4660
4661         obstack_grow(&asm_obst, tmp_in_constraints,
4662                      in_size * sizeof(tmp_in_constraints[0]));
4663         free(tmp_in_constraints);
4664         /* find and count input and output arguments */
4665         argument = statement->inputs;
4666         for( ; argument != NULL; argument = argument->next) {
4667                 const char *constraints = argument->constraints.begin;
4668                 asm_constraint_flags_t asm_flags
4669                         = be_parse_asm_constraints(constraints);
4670
4671                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4672                         errorf(&statement->base.source_position,
4673                                "some constraints in '%s' are not supported", constraints);
4674                         continue;
4675                 }
4676                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4677                         errorf(&statement->base.source_position,
4678                                "some constraints in '%s' are invalid", constraints);
4679                         continue;
4680                 }
4681                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4682                         errorf(&statement->base.source_position,
4683                                "write flag specified for input constraints '%s'",
4684                                constraints);
4685                         continue;
4686                 }
4687
4688                 ir_node *input;
4689                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4690                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4691                         /* we can treat this as "normal" input */
4692                         input = expression_to_firm(argument->expression);
4693                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4694                         /* pure memory ops need no input (but we have to make sure we
4695                          * attach to the memory) */
4696                         assert(! (asm_flags &
4697                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4698                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4699                         needs_memory = true;
4700                         input = expression_to_addr(argument->expression);
4701                 } else {
4702                         errorf(&statement->base.source_position,
4703                                "only modifiers but no place set in constraints '%s'",
4704                                constraints);
4705                         continue;
4706                 }
4707
4708                 ir_asm_constraint constraint;
4709                 constraint.pos        = next_pos++;
4710                 constraint.constraint = new_id_from_str(constraints);
4711                 constraint.mode       = get_irn_mode(input);
4712
4713                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4714                 ins[in_size++] = input;
4715         }
4716
4717         if (needs_memory) {
4718                 ir_asm_constraint constraint;
4719                 constraint.pos        = next_pos++;
4720                 constraint.constraint = new_id_from_str("");
4721                 constraint.mode       = mode_M;
4722
4723                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4724                 ins[in_size++] = get_store();
4725         }
4726
4727         assert(obstack_object_size(&asm_obst)
4728                         == in_size * sizeof(ir_asm_constraint));
4729         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4730
4731         /* create asm node */
4732         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4733
4734         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4735
4736         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4737                                   out_size, output_constraints,
4738                                   n_clobbers, clobbers, asm_text);
4739
4740         if (statement->is_volatile) {
4741                 set_irn_pinned(node, op_pin_state_pinned);
4742         } else {
4743                 set_irn_pinned(node, op_pin_state_floats);
4744         }
4745
4746         /* create output projs & connect them */
4747         if (needs_memory) {
4748                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4749                 set_store(projm);
4750         }
4751
4752         size_t i;
4753         for (i = 0; i < out_size; ++i) {
4754                 const expression_t *out_expr = out_exprs[i];
4755                 long                pn       = i;
4756                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4757                 ir_node            *proj     = new_Proj(node, mode, pn);
4758                 ir_node            *addr     = out_addrs[i];
4759
4760                 set_value_for_expression_addr(out_expr, proj, addr);
4761         }
4762 }
4763
4764 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4765         statement_to_firm(statement->try_statement);
4766         warningf(&statement->base.source_position, "structured exception handling ignored");
4767 }
4768
4769 static void     leave_statement_to_firm(leave_statement_t *statement) {
4770         errorf(&statement->base.source_position, "__leave not supported yet");
4771 }
4772
4773 /**
4774  * Transform a statement.
4775  */
4776 static void statement_to_firm(statement_t *statement)
4777 {
4778 #ifndef NDEBUG
4779         assert(!statement->base.transformed);
4780         statement->base.transformed = true;
4781 #endif
4782
4783         switch(statement->kind) {
4784         case STATEMENT_INVALID:
4785                 panic("invalid statement found");
4786                 return;
4787         case STATEMENT_EMPTY:
4788                 /* nothing */
4789                 return;
4790         case STATEMENT_COMPOUND:
4791                 compound_statement_to_firm(&statement->compound);
4792                 return;
4793         case STATEMENT_RETURN:
4794                 return_statement_to_firm(&statement->returns);
4795                 return;
4796         case STATEMENT_EXPRESSION:
4797                 expression_statement_to_firm(&statement->expression);
4798                 return;
4799         case STATEMENT_IF:
4800                 if_statement_to_firm(&statement->ifs);
4801                 return;
4802         case STATEMENT_WHILE:
4803                 while_statement_to_firm(&statement->whiles);
4804                 return;
4805         case STATEMENT_DO_WHILE:
4806                 do_while_statement_to_firm(&statement->do_while);
4807                 return;
4808         case STATEMENT_DECLARATION:
4809                 declaration_statement_to_firm(&statement->declaration);
4810                 return;
4811         case STATEMENT_BREAK:
4812                 create_jump_statement(statement, get_break_label());
4813                 return;
4814         case STATEMENT_CONTINUE:
4815                 create_jump_statement(statement, continue_label);
4816                 return;
4817         case STATEMENT_SWITCH:
4818                 switch_statement_to_firm(&statement->switchs);
4819                 return;
4820         case STATEMENT_CASE_LABEL:
4821                 case_label_to_firm(&statement->case_label);
4822                 return;
4823         case STATEMENT_FOR:
4824                 for_statement_to_firm(&statement->fors);
4825                 return;
4826         case STATEMENT_LABEL:
4827                 label_to_firm(&statement->label);
4828                 return;
4829         case STATEMENT_GOTO:
4830                 goto_to_firm(&statement->gotos);
4831                 return;
4832         case STATEMENT_ASM:
4833                 asm_statement_to_firm(&statement->asms);
4834                 return;
4835         case STATEMENT_MS_TRY:
4836                 ms_try_statement_to_firm(&statement->ms_try);
4837                 return;
4838         case STATEMENT_LEAVE:
4839                 leave_statement_to_firm(&statement->leave);
4840                 return;
4841         }
4842         panic("Statement not implemented\n");
4843 }
4844
4845 static int count_decls_in_expression(const expression_t *expression);
4846
4847 static int count_local_declarations(const declaration_t *      decl,
4848                                     const declaration_t *const end)
4849 {
4850         int count = 0;
4851         for (; decl != end; decl = decl->next) {
4852                 if (decl->namespc != NAMESPACE_NORMAL)
4853                         continue;
4854                 type_t *type = skip_typeref(decl->type);
4855
4856                 if (!decl->address_taken && is_type_scalar(type))
4857                         ++count;
4858                 const initializer_t *initializer = decl->init.initializer;
4859                 /* FIXME: should walk initializer hierarchies... */
4860                 if (initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4861                         count += count_decls_in_expression(initializer->value.value);
4862                 }
4863         }
4864         return count;
4865 }
4866
4867 static int count_decls_in_expression(const expression_t *expression) {
4868         int count = 0;
4869
4870         if (expression == NULL)
4871                 return 0;
4872
4873         switch((expression_kind_t) expression->base.kind) {
4874         case EXPR_STATEMENT:
4875                 return count_decls_in_stmts(expression->statement.statement);
4876         EXPR_BINARY_CASES {
4877                 int count_left  = count_decls_in_expression(expression->binary.left);
4878                 int count_right = count_decls_in_expression(expression->binary.right);
4879                 return count_left + count_right;
4880         }
4881         EXPR_UNARY_CASES
4882                 return count_decls_in_expression(expression->unary.value);
4883         case EXPR_CALL: {
4884                 call_argument_t *argument = expression->call.arguments;
4885                 for( ; argument != NULL; argument = argument->next) {
4886                         count += count_decls_in_expression(argument->expression);
4887                 }
4888                 return count;
4889         }
4890
4891         case EXPR_UNKNOWN:
4892         case EXPR_INVALID:
4893                 panic("unexpected expression kind");
4894
4895         case EXPR_COMPOUND_LITERAL:
4896                 /* TODO... */
4897                 break;
4898
4899         case EXPR_CONDITIONAL:
4900                 count += count_decls_in_expression(expression->conditional.condition);
4901                 count += count_decls_in_expression(expression->conditional.true_expression);
4902                 count += count_decls_in_expression(expression->conditional.false_expression);
4903                 return count;
4904
4905         case EXPR_BUILTIN_PREFETCH:
4906                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
4907                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
4908                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
4909                 return count;
4910
4911         case EXPR_BUILTIN_CONSTANT_P:
4912                 count += count_decls_in_expression(expression->builtin_constant.value);
4913                 return count;
4914
4915         case EXPR_SELECT:
4916                 count += count_decls_in_expression(expression->select.compound);
4917                 return count;
4918
4919         case EXPR_ARRAY_ACCESS:
4920                 count += count_decls_in_expression(expression->array_access.array_ref);
4921                 count += count_decls_in_expression(expression->array_access.index);
4922                 return count;
4923
4924         case EXPR_CLASSIFY_TYPE:
4925                 count += count_decls_in_expression(expression->classify_type.type_expression);
4926                 return count;
4927
4928         case EXPR_SIZEOF:
4929         case EXPR_ALIGNOF: {
4930                 expression_t *tp_expression = expression->typeprop.tp_expression;
4931                 if (tp_expression != NULL) {
4932                         count += count_decls_in_expression(tp_expression);
4933                 }
4934                 return count;
4935         }
4936
4937         case EXPR_OFFSETOF:
4938         case EXPR_REFERENCE:
4939         case EXPR_CONST:
4940         case EXPR_CHARACTER_CONSTANT:
4941         case EXPR_WIDE_CHARACTER_CONSTANT:
4942         case EXPR_STRING_LITERAL:
4943         case EXPR_WIDE_STRING_LITERAL:
4944         case EXPR_FUNCNAME:
4945         case EXPR_BUILTIN_SYMBOL:
4946         case EXPR_VA_START:
4947         case EXPR_VA_ARG:
4948                 break;
4949         }
4950
4951         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
4952          * (or implement all the missing expressions here/implement a walker)
4953          */
4954
4955         return 0;
4956 }
4957
4958 static int count_decls_in_stmts(const statement_t *stmt)
4959 {
4960         int count = 0;
4961         for (; stmt != NULL; stmt = stmt->base.next) {
4962                 switch (stmt->kind) {
4963                         case STATEMENT_EMPTY:
4964                                 break;
4965
4966                         case STATEMENT_DECLARATION: {
4967                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
4968                                 count += count_local_declarations(decl_stmt->declarations_begin,
4969                                                                   decl_stmt->declarations_end->next);
4970                                 break;
4971                         }
4972
4973                         case STATEMENT_COMPOUND: {
4974                                 const compound_statement_t *const comp =
4975                                         &stmt->compound;
4976                                 count += count_decls_in_stmts(comp->statements);
4977                                 break;
4978                         }
4979
4980                         case STATEMENT_IF: {
4981                                 const if_statement_t *const if_stmt = &stmt->ifs;
4982                                 count += count_decls_in_expression(if_stmt->condition);
4983                                 count += count_decls_in_stmts(if_stmt->true_statement);
4984                                 count += count_decls_in_stmts(if_stmt->false_statement);
4985                                 break;
4986                         }
4987
4988                         case STATEMENT_SWITCH: {
4989                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
4990                                 count += count_decls_in_expression(switch_stmt->expression);
4991                                 count += count_decls_in_stmts(switch_stmt->body);
4992                                 break;
4993                         }
4994
4995                         case STATEMENT_LABEL: {
4996                                 const label_statement_t *const label_stmt = &stmt->label;
4997                                 if (label_stmt->statement != NULL) {
4998                                         count += count_decls_in_stmts(label_stmt->statement);
4999                                 }
5000                                 break;
5001                         }
5002
5003                         case STATEMENT_WHILE: {
5004                                 const while_statement_t *const while_stmt = &stmt->whiles;
5005                                 count += count_decls_in_expression(while_stmt->condition);
5006                                 count += count_decls_in_stmts(while_stmt->body);
5007                                 break;
5008                         }
5009
5010                         case STATEMENT_DO_WHILE: {
5011                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
5012                                 count += count_decls_in_expression(do_while_stmt->condition);
5013                                 count += count_decls_in_stmts(do_while_stmt->body);
5014                                 break;
5015                         }
5016
5017                         case STATEMENT_FOR: {
5018                                 const for_statement_t *const for_stmt = &stmt->fors;
5019                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
5020                                 count += count_decls_in_expression(for_stmt->initialisation);
5021                                 count += count_decls_in_expression(for_stmt->condition);
5022                                 count += count_decls_in_expression(for_stmt->step);
5023                                 count += count_decls_in_stmts(for_stmt->body);
5024                                 break;
5025                         }
5026
5027                         case STATEMENT_CASE_LABEL: {
5028                                 const case_label_statement_t *label = &stmt->case_label;
5029                                 count += count_decls_in_expression(label->expression);
5030                                 if (label->statement != NULL) {
5031                                         count += count_decls_in_stmts(label->statement);
5032                                 }
5033                                 break;
5034                         }
5035
5036                         case STATEMENT_ASM:
5037                         case STATEMENT_BREAK:
5038                         case STATEMENT_CONTINUE:
5039                                 break;
5040
5041                         case STATEMENT_EXPRESSION: {
5042                                 const expression_statement_t *expr_stmt = &stmt->expression;
5043                                 count += count_decls_in_expression(expr_stmt->expression);
5044                                 break;
5045                         }
5046
5047                         case STATEMENT_GOTO:
5048                         case STATEMENT_LEAVE:
5049                         case STATEMENT_INVALID:
5050                                 break;
5051
5052                         case STATEMENT_RETURN: {
5053                                 const return_statement_t *ret_stmt = &stmt->returns;
5054                                 count += count_decls_in_expression(ret_stmt->value);
5055                                 break;
5056                         }
5057
5058                         case STATEMENT_MS_TRY: {
5059                                 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
5060                                 count += count_decls_in_stmts(try_stmt->try_statement);
5061                                 if (try_stmt->except_expression != NULL)
5062                                         count += count_decls_in_expression(try_stmt->except_expression);
5063                                 count += count_decls_in_stmts(try_stmt->final_statement);
5064                                 break;
5065                         }
5066                 }
5067         }
5068         return count;
5069 }
5070
5071 static int get_function_n_local_vars(declaration_t *declaration)
5072 {
5073         int count = 0;
5074
5075         /* count parameters */
5076         count += count_local_declarations(declaration->scope.declarations, NULL);
5077
5078         /* count local variables declared in body */
5079         count += count_decls_in_stmts(declaration->init.statement);
5080
5081         return count;
5082 }
5083
5084 static void initialize_function_parameters(declaration_t *declaration)
5085 {
5086         ir_graph        *irg             = current_ir_graph;
5087         ir_node         *args            = get_irg_args(irg);
5088         ir_node         *start_block     = get_irg_start_block(irg);
5089         ir_type         *function_irtype = get_ir_type(declaration->type);
5090
5091         int            n         = 0;
5092         declaration_t *parameter = declaration->scope.declarations;
5093         for( ; parameter != NULL; parameter = parameter->next, ++n) {
5094                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
5095                 type_t *type = skip_typeref(parameter->type);
5096
5097                 bool needs_entity = parameter->address_taken;
5098                 assert(!is_type_array(type));
5099                 if (is_type_compound(type)) {
5100                         needs_entity = true;
5101                 }
5102
5103                 if (needs_entity) {
5104                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5105                         ident     *id     = new_id_from_str(parameter->symbol->string);
5106                         set_entity_ident(entity, id);
5107
5108                         parameter->declaration_kind
5109                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5110                         parameter->v.entity = entity;
5111                         continue;
5112                 }
5113
5114                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5115                 ir_mode *param_mode   = get_type_mode(param_irtype);
5116
5117                 long     pn    = n;
5118                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5119
5120                 ir_mode *mode = get_ir_mode(type);
5121                 value = create_conv(NULL, value, mode);
5122                 value = do_strict_conv(NULL, value);
5123
5124                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
5125                 parameter->v.value_number   = next_value_number_function;
5126                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
5127                 ++next_value_number_function;
5128
5129                 set_value(parameter->v.value_number, value);
5130         }
5131 }
5132
5133 /**
5134  * Handle additional decl modifiers for IR-graphs
5135  *
5136  * @param irg            the IR-graph
5137  * @param dec_modifiers  additional modifiers
5138  */
5139 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5140 {
5141         if (decl_modifiers & DM_NORETURN) {
5142                 /* TRUE if the declaration includes the Microsoft
5143                    __declspec(noreturn) specifier. */
5144                 set_irg_additional_property(irg, mtp_property_noreturn);
5145         }
5146         if (decl_modifiers & DM_NOTHROW) {
5147                 /* TRUE if the declaration includes the Microsoft
5148                    __declspec(nothrow) specifier. */
5149                 set_irg_additional_property(irg, mtp_property_nothrow);
5150         }
5151         if (decl_modifiers & DM_NAKED) {
5152                 /* TRUE if the declaration includes the Microsoft
5153                    __declspec(naked) specifier. */
5154                 set_irg_additional_property(irg, mtp_property_naked);
5155         }
5156         if (decl_modifiers & DM_FORCEINLINE) {
5157                 /* TRUE if the declaration includes the
5158                    Microsoft __forceinline specifier. */
5159                 set_irg_inline_property(irg, irg_inline_forced);
5160         }
5161         if (decl_modifiers & DM_NOINLINE) {
5162                 /* TRUE if the declaration includes the Microsoft
5163                    __declspec(noinline) specifier. */
5164                 set_irg_inline_property(irg, irg_inline_forbidden);
5165         }
5166 }
5167
5168 static void add_function_pointer(ir_type *segment, ir_entity *method,
5169                                  const char *unique_template)
5170 {
5171         ir_type   *method_type  = get_entity_type(method);
5172         ident     *id           = id_unique(unique_template);
5173         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5174
5175         ident     *ide          = id_unique(unique_template);
5176         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5177         ir_graph  *irg          = get_const_code_irg();
5178         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5179                                                            method, NULL);
5180
5181         set_entity_compiler_generated(ptr, 1);
5182         set_entity_variability(ptr, variability_constant);
5183         set_atomic_ent_value(ptr, val);
5184 }
5185
5186 /**
5187  * Create code for a function.
5188  */
5189 static void create_function(declaration_t *declaration)
5190 {
5191         ir_entity *function_entity = get_function_entity(declaration);
5192
5193         if (declaration->init.statement == NULL)
5194                 return;
5195
5196         if (declaration->modifiers & DM_CONSTRUCTOR) {
5197                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5198                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5199         }
5200         if (declaration->modifiers & DM_DESTRUCTOR) {
5201                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5202                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5203         }
5204
5205         current_function_decl = declaration;
5206         current_function_name = NULL;
5207         current_funcsig       = NULL;
5208
5209         assert(imature_blocks == NULL);
5210         imature_blocks = NEW_ARR_F(ir_node*, 0);
5211
5212         int       n_local_vars = get_function_n_local_vars(declaration);
5213         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5214
5215         set_irg_fp_model(irg, firm_opt.fp_model);
5216         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5217         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5218
5219         ir_node *first_block = get_cur_block();
5220
5221         /* set inline flags */
5222         if (declaration->is_inline)
5223                 set_irg_inline_property(irg, irg_inline_recomended);
5224         handle_decl_modifier_irg(irg, declaration->modifiers);
5225
5226         next_value_number_function = 0;
5227         initialize_function_parameters(declaration);
5228
5229         statement_to_firm(declaration->init.statement);
5230
5231         ir_node *end_block = get_irg_end_block(irg);
5232
5233         /* do we have a return statement yet? */
5234         if (get_cur_block() != NULL) {
5235                 type_t *type = skip_typeref(declaration->type);
5236                 assert(is_type_function(type));
5237                 const function_type_t *func_type   = &type->function;
5238                 const type_t          *return_type
5239                         = skip_typeref(func_type->return_type);
5240
5241                 ir_node *ret;
5242                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5243                         ret = new_Return(get_store(), 0, NULL);
5244                 } else {
5245                         ir_mode *mode;
5246                         if (is_type_scalar(return_type)) {
5247                                 mode = get_ir_mode(func_type->return_type);
5248                         } else {
5249                                 mode = mode_P_data;
5250                         }
5251
5252                         ir_node *in[1];
5253                         /* §5.1.2.2.3 main implicitly returns 0 */
5254                         if (strcmp(declaration->symbol->string, "main") == 0) {
5255                                 in[0] = new_Const(mode, get_mode_null(mode));
5256                         } else {
5257                                 in[0] = new_Unknown(mode);
5258                                 if (warning.return_type) {
5259                                         warningf(&declaration->source_position,
5260                                                 "missing return statement at end of non-void function '%Y'",
5261                                                 declaration->symbol);
5262                                 }
5263                         }
5264                         ret = new_Return(get_store(), 1, in);
5265                 }
5266                 add_immBlock_pred(end_block, ret);
5267         }
5268
5269         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
5270                 mature_immBlock(imature_blocks[i]);
5271         }
5272         DEL_ARR_F(imature_blocks);
5273         imature_blocks = NULL;
5274
5275         mature_immBlock(first_block);
5276         mature_immBlock(end_block);
5277
5278         irg_finalize_cons(irg);
5279
5280         /* finalize the frame type */
5281         ir_type *frame_type = get_irg_frame_type(irg);
5282         int      n          = get_compound_n_members(frame_type);
5283         int      align_all  = 4;
5284         int      offset     = 0;
5285         for(int i = 0; i < n; ++i) {
5286                 ir_entity *entity      = get_compound_member(frame_type, i);
5287                 ir_type   *entity_type = get_entity_type(entity);
5288
5289                 int align = get_type_alignment_bytes(entity_type);
5290                 if (align > align_all)
5291                         align_all = align;
5292                 int misalign = 0;
5293                 if (align > 0) {
5294                         misalign  = offset % align;
5295                         if (misalign > 0) {
5296                                 offset += align - misalign;
5297                         }
5298                 }
5299
5300                 set_entity_offset(entity, offset);
5301                 offset += get_type_size_bytes(entity_type);
5302         }
5303         set_type_size_bytes(frame_type, offset);
5304         set_type_alignment_bytes(frame_type, align_all);
5305
5306         irg_vrfy(irg);
5307 }
5308
5309 static void scope_to_firm(scope_t *scope)
5310 {
5311         /* first pass: create declarations */
5312         declaration_t *declaration = scope->declarations;
5313         for( ; declaration != NULL; declaration = declaration->next) {
5314                 if (declaration->namespc != NAMESPACE_NORMAL)
5315                         continue;
5316                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5317                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5318                         continue;
5319                 if (declaration->symbol == NULL)
5320                         continue;
5321
5322                 type_t *type = skip_typeref(declaration->type);
5323                 if (is_type_function(type)) {
5324                         get_function_entity(declaration);
5325                 } else {
5326                         create_global_variable(declaration);
5327                 }
5328         }
5329
5330         /* second pass: create code/initializers */
5331         declaration = scope->declarations;
5332         for( ; declaration != NULL; declaration = declaration->next) {
5333                 if (declaration->namespc != NAMESPACE_NORMAL)
5334                         continue;
5335                 if (declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
5336                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
5337                         continue;
5338                 if (declaration->symbol == NULL)
5339                         continue;
5340
5341                 type_t *type = declaration->type;
5342                 if (type->kind == TYPE_FUNCTION) {
5343                         create_function(declaration);
5344                 } else {
5345                         assert(declaration->declaration_kind
5346                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5347                         current_ir_graph = get_const_code_irg();
5348                         create_declaration_initializer(declaration);
5349                 }
5350         }
5351 }
5352
5353 void init_ast2firm(void)
5354 {
5355         obstack_init(&asm_obst);
5356         init_atomic_modes();
5357
5358         id_underscore = new_id_from_chars("_", 1);
5359         id_imp        = new_id_from_chars("__imp_", 6);
5360
5361         /* OS option must be set to the backend */
5362         const char *s = "ia32-gasmode=linux";
5363         switch (firm_opt.os_support) {
5364         case OS_SUPPORT_MINGW:
5365                 create_ld_ident = create_ld_ident_win32;
5366                 s = "ia32-gasmode=mingw";
5367                 break;
5368         case OS_SUPPORT_LINUX:
5369                 create_ld_ident = create_ld_ident_linux_elf;
5370                 s = "ia32-gasmode=elf";
5371                 break;
5372         case OS_SUPPORT_MACHO:
5373                 create_ld_ident = create_ld_ident_macho;
5374                 s = "ia32-gasmode=macho";
5375                 break;
5376         }
5377         int res = firm_be_option(s);
5378         (void) res;
5379         assert(res);
5380
5381         /* create idents for all known runtime functions */
5382         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5383                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5384         }
5385
5386         entitymap_init(&entitymap);
5387 }
5388
5389 static void init_ir_types(void)
5390 {
5391         static int ir_types_initialized = 0;
5392         if (ir_types_initialized)
5393                 return;
5394         ir_types_initialized = 1;
5395
5396         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
5397         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
5398         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
5399
5400         ir_type_int        = get_ir_type(type_int);
5401         ir_type_const_char = get_ir_type(type_const_char);
5402         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5403         ir_type_void       = get_ir_type(type_void);
5404 }
5405
5406 void exit_ast2firm(void)
5407 {
5408         entitymap_destroy(&entitymap);
5409         obstack_free(&asm_obst, NULL);
5410 }
5411
5412 static void global_asm_to_firm(statement_t *s)
5413 {
5414         for (; s != NULL; s = s->base.next) {
5415                 assert(s->kind == STATEMENT_ASM);
5416
5417                 char const *const text = s->asms.asm_text.begin;
5418                 size_t            size = s->asms.asm_text.size;
5419
5420                 /* skip the last \0 */
5421                 if (text[size - 1] == '\0')
5422                         --size;
5423
5424                 ident *const id = new_id_from_chars(text, size);
5425                 add_irp_asm(id);
5426         }
5427 }
5428
5429 void translation_unit_to_firm(translation_unit_t *unit)
5430 {
5431         /* just to be sure */
5432         continue_label      = NULL;
5433         break_label         = NULL;
5434         current_switch_cond = NULL;
5435
5436         init_ir_types();
5437
5438         scope_to_firm(&unit->scope);
5439         global_asm_to_firm(unit->global_asm);
5440 }