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
  29 #include "ast2firm.h"
  30
  31 #include "adt/error.h"
  32 #include "adt/array.h"
  33 #include "symbol_t.h"
  34 #include "token_t.h"
  35 #include "type_t.h"
  36 #include "ast_t.h"
  37 #include "parser.h"
  38 #include "diagnostic.h"
  39 #include "lang_features.h"
  40 #include "types.h"
  41 #include "driver/firm_opt.h"
  42 #include "driver/firm_cmdline.h"
  43
  44 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  45
  46 /* some idents needed for name mangling */
  47 static ident *id_underscore;
  48 static ident *id_imp;
  49
  50 static ir_type *ir_type_const_char;
  51 static ir_type *ir_type_wchar_t;
  52 static ir_type *ir_type_void;
  53 static ir_type *ir_type_int;
  54
  55 static type_t *type_const_char;
  56
  57 static int       next_value_number_function;
  58 static ir_node  *continue_label;
  59 static ir_node  *break_label;
  60 static ir_node  *current_switch_cond;
  61 static bool      saw_default_label;
  62 static ir_node **imature_blocks;
  63
  64 static const declaration_t *current_function_decl;
  65 static ir_node             *current_function_name;
  66 static ir_node             *current_funcsig;
  67
  68 static struct obstack asm_obst;
  69
  70 typedef enum declaration_kind_t {
  71         DECLARATION_KIND_UNKNOWN,
  72         DECLARATION_KIND_FUNCTION,
  73         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  74         DECLARATION_KIND_GLOBAL_VARIABLE,
  75         DECLARATION_KIND_LOCAL_VARIABLE,
  76         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  77         DECLARATION_KIND_COMPOUND_MEMBER,
  78         DECLARATION_KIND_LABEL_BLOCK,
  79         DECLARATION_KIND_ENUM_ENTRY,
  80         DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE,
  81         DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
  82 } declaration_kind_t;
  83
  84 static ir_type *get_ir_type(type_t *type);
  85 static ir_type *get_ir_type_incomplete(type_t *type);
  86 static int count_decls_in_stmts(const statement_t *stmt);
  87
  88 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  89 {
  90         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  91
  92         warningf(&declaration->source_position,
  93                  "variable '%#T' might be used uninitialized",
  94                  declaration->type, declaration->symbol);
  95         return new_r_Unknown(irg, mode);
  96 }
  97
  98 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  99 {
 100         const source_position_t *pos = (const source_position_t*) dbg;
 101         if(pos == NULL)
 102                 return 0;
 103         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 104                                    pos->linenr);
 105 }
 106
 107 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 108 {
 109         const source_position_t *pos = (const source_position_t*) dbg;
 110         if(pos == NULL)
 111                 return NULL;
 112         if(line != NULL)
 113                 *line = pos->linenr;
 114         return pos->input_name;
 115 }
 116
 117 static dbg_info *get_dbg_info(const source_position_t *pos)
 118 {
 119         return (dbg_info*) pos;
 120 }
 121
 122 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 123
 124 static ir_mode *mode_int, *mode_uint;
 125
 126 static ir_node *expression_to_firm(const expression_t *expression);
 127 static inline ir_mode *get_ir_mode(type_t *type);
 128
 129 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 130 {
 131         unsigned flags = get_atomic_type_flags(kind);
 132         unsigned size  = get_atomic_type_size(kind);
 133         if( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 134                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 135                 char            name[64];
 136                 mode_sort       sort;
 137                 unsigned        bit_size     = size * 8;
 138                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 139                 mode_arithmetic arithmetic;
 140                 unsigned        modulo_shift;
 141
 142                 if(flags & ATOMIC_TYPE_FLAG_INTEGER) {
 143                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 144                         snprintf(name, sizeof(name), "i%s%d", is_signed?"":"u", bit_size);
 145                         sort         = irms_int_number;
 146                         arithmetic   = irma_twos_complement;
 147                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 148                 } else {
 149                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 150                         snprintf(name, sizeof(name), "f%d", bit_size);
 151                         sort         = irms_float_number;
 152                         arithmetic   = irma_ieee754;
 153                         modulo_shift = 0;
 154                 }
 155                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 156                                    modulo_shift);
 157         }
 158
 159         return NULL;
 160 }
 161
 162 /**
 163  * Initialises the atomic modes depending on the machine size.
 164  */
 165 static void init_atomic_modes(void)
 166 {
 167         for(int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 168                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 169         }
 170         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 171         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 172
 173         /* there's no real void type in firm */
 174         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 175
 176         /* initialize pointer modes */
 177         char            name[64];
 178         mode_sort       sort         = irms_reference;
 179         unsigned        bit_size     = machine_size;
 180         bool            is_signed    = 0;
 181         mode_arithmetic arithmetic   = irma_twos_complement;
 182         unsigned        modulo_shift
 183                 = bit_size < machine_size ? machine_size : bit_size;
 184
 185         snprintf(name, sizeof(name), "p%d", machine_size);
 186         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 187                                         modulo_shift);
 188
 189         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 190         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 191
 192         /* Hmm, pointers should be machine size */
 193         set_modeP_data(ptr_mode);
 194         set_modeP_code(ptr_mode);
 195 }
 196
 197 static unsigned get_compound_type_size(compound_type_t *type)
 198 {
 199         ir_type *irtype = get_ir_type((type_t*) type);
 200         return get_type_size_bytes(irtype);
 201 }
 202
 203 static unsigned get_array_type_size(array_type_t *type)
 204 {
 205         assert(!type->is_vla);
 206         ir_type *irtype = get_ir_type((type_t*) type);
 207         return get_type_size_bytes(irtype);
 208 }
 209
 210
 211 static unsigned get_type_size_const(type_t *type)
 212 {
 213         type = skip_typeref(type);
 214
 215         switch(type->kind) {
 216         case TYPE_ERROR:
 217                 panic("error type occured");
 218         case TYPE_ATOMIC:
 219                 return get_atomic_type_size(type->atomic.akind);
 220         case TYPE_COMPLEX:
 221                 return 2 * get_atomic_type_size(type->complex.akind);
 222         case TYPE_IMAGINARY:
 223                 return get_atomic_type_size(type->imaginary.akind);
 224         case TYPE_ENUM:
 225                 return get_mode_size_bytes(mode_int);
 226         case TYPE_COMPOUND_UNION:
 227         case TYPE_COMPOUND_STRUCT:
 228                 return get_compound_type_size(&type->compound);
 229         case TYPE_FUNCTION:
 230                 /* just a pointer to the function */
 231                 return get_mode_size_bytes(mode_P_code);
 232         case TYPE_POINTER:
 233                 return get_mode_size_bytes(mode_P_data);
 234         case TYPE_ARRAY:
 235                 return get_array_type_size(&type->array);
 236         case TYPE_BUILTIN:
 237                 return get_type_size_const(type->builtin.real_type);
 238         case TYPE_BITFIELD:
 239                 panic("type size of bitfield request");
 240         case TYPE_TYPEDEF:
 241         case TYPE_TYPEOF:
 242         case TYPE_INVALID:
 243                 break;
 244         }
 245         panic("Trying to determine size of invalid type");
 246 }
 247
 248 static ir_node *get_type_size(type_t *type)
 249 {
 250         type = skip_typeref(type);
 251
 252         if(is_type_array(type) && type->array.is_vla) {
 253                 ir_node *size_node = type->array.size_node;
 254                 if(size_node == NULL) {
 255                         size_node = expression_to_firm(type->array.size_expression);
 256                         assert(!is_Const(size_node));
 257                         type->array.size_node = size_node;
 258                 }
 259
 260                 ir_node *elem_size = get_type_size(type->array.element_type);
 261                 ir_mode *mode      = get_irn_mode(size_node);
 262                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 263                 return real_size;
 264         }
 265
 266         ir_mode *mode = get_ir_mode(type_size_t);
 267         symconst_symbol sym;
 268         sym.type_p = get_ir_type(type);
 269         return new_SymConst(mode, sym, symconst_type_size);
 270 }
 271
 272 static unsigned count_parameters(const function_type_t *function_type)
 273 {
 274         unsigned count = 0;
 275
 276         function_parameter_t *parameter = function_type->parameters;
 277         for ( ; parameter != NULL; parameter = parameter->next) {
 278                 ++count;
 279         }
 280
 281         return count;
 282 }
 283
 284 /**
 285  * Creates a Firm type for an atomic type
 286  */
 287 static ir_type *create_atomic_type(const atomic_type_t *type)
 288 {
 289         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 290         atomic_type_kind_t  kind      = type->akind;
 291         ir_mode            *mode      = _atomic_modes[kind];
 292         ident              *id        = get_mode_ident(mode);
 293         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 294
 295         set_type_alignment_bytes(irtype, type->base.alignment);
 296
 297         return irtype;
 298 }
 299
 300 /**
 301  * Creates a Firm type for a complex type
 302  */
 303 static ir_type *create_complex_type(const complex_type_t *type)
 304 {
 305         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 306         atomic_type_kind_t  kind      = type->akind;
 307         ir_mode            *mode      = _atomic_modes[kind];
 308         ident              *id        = get_mode_ident(mode);
 309
 310         (void) id;
 311         (void) dbgi;
 312
 313         /* FIXME: finish the array */
 314         return NULL;
 315 }
 316
 317 /**
 318  * Creates a Firm type for an imaginary type
 319  */
 320 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 321 {
 322         dbg_info           *dbgi      = get_dbg_info(&type->base.source_position);
 323         atomic_type_kind_t  kind      = type->akind;
 324         ir_mode            *mode      = _atomic_modes[kind];
 325         ident              *id        = get_mode_ident(mode);
 326         ir_type            *irtype    = new_d_type_primitive(id, mode, dbgi);
 327
 328         set_type_alignment_bytes(irtype, type->base.alignment);
 329
 330         return irtype;
 331 }
 332
 333 static ir_type *create_method_type(const function_type_t *function_type)
 334 {
 335         type_t  *return_type  = function_type->return_type;
 336
 337         ident   *id           = id_unique("functiontype.%u");
 338         int      n_parameters = count_parameters(function_type);
 339         int      n_results    = return_type == type_void ? 0 : 1;
 340         dbg_info *dbgi        = get_dbg_info(&function_type->base.source_position);
 341         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 342
 343         if(return_type != type_void) {
 344                 ir_type *restype = get_ir_type(return_type);
 345                 set_method_res_type(irtype, 0, restype);
 346         }
 347
 348         function_parameter_t *parameter = function_type->parameters;
 349         int                   n         = 0;
 350         for( ; parameter != NULL; parameter = parameter->next) {
 351                 ir_type *p_irtype = get_ir_type(parameter->type);
 352                 set_method_param_type(irtype, n, p_irtype);
 353                 ++n;
 354         }
 355
 356         if(function_type->variadic || function_type->unspecified_parameters) {
 357                 set_method_variadicity(irtype, variadicity_variadic);
 358         }
 359
 360         return irtype;
 361 }
 362
 363 static ir_type *create_pointer_type(pointer_type_t *type)
 364 {
 365         type_t   *points_to    = type->points_to;
 366         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 367         dbg_info *dbgi         = get_dbg_info(&type->base.source_position);
 368         ir_type  *ir_type      = new_d_type_pointer(id_unique("pointer.%u"),
 369                                                     ir_points_to, mode_P_data, dbgi);
 370
 371         return ir_type;
 372 }
 373
 374 static ir_type *create_array_type(array_type_t *type)
 375 {
 376         type_t  *element_type    = type->element_type;
 377         ir_type *ir_element_type = get_ir_type(element_type);
 378
 379         ident    *id      = id_unique("array.%u");
 380         dbg_info *dbgi    = get_dbg_info(&type->base.source_position);
 381         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 382
 383         const int align = get_type_alignment_bytes(ir_element_type);
 384         set_type_alignment_bytes(ir_type, align);
 385
 386         if(type->size_constant) {
 387                 int n_elements = type->size;
 388
 389                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 390
 391                 size_t elemsize = get_type_size_bytes(ir_element_type);
 392                 if(elemsize % align > 0) {
 393                         elemsize += align - (elemsize % align);
 394                 }
 395                 set_type_size_bytes(ir_type, n_elements * elemsize);
 396         } else {
 397                 set_array_lower_bound_int(ir_type, 0, 0);
 398         }
 399         set_type_state(ir_type, layout_fixed);
 400
 401         return ir_type;
 402 }
 403
 404 /**
 405  * Return the signed integer type of size bits.
 406  *
 407  * @param size   the size
 408  */
 409 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 410                                                  unsigned size)
 411 {
 412         static ir_mode *s_modes[64 + 1] = {NULL, };
 413         ir_type *res;
 414         ir_mode *mode;
 415
 416         if (size <= 0 || size > 64)
 417                 return NULL;
 418
 419         mode = s_modes[size];
 420         if (mode == NULL) {
 421                 char name[32];
 422
 423                 snprintf(name, sizeof(name), "bf_I%u", size);
 424                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 425                                    size <= 32 ? 32 : size );
 426                 s_modes[size] = mode;
 427         }
 428
 429         char name[32];
 430         snprintf(name, sizeof(name), "I%u", size);
 431         ident *id = new_id_from_str(name);
 432         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 433         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 434         set_primitive_base_type(res, base_tp);
 435
 436         return res;
 437 }
 438
 439 /**
 440  * Return the unsigned integer type of size bits.
 441  *
 442  * @param size   the size
 443  */
 444 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 445                                                    unsigned size)
 446 {
 447         static ir_mode *u_modes[64 + 1] = {NULL, };
 448         ir_type *res;
 449         ir_mode *mode;
 450
 451         if (size <= 0 || size > 64)
 452                 return NULL;
 453
 454         mode = u_modes[size];
 455         if (mode == NULL) {
 456                 char name[32];
 457
 458                 snprintf(name, sizeof(name), "bf_U%u", size);
 459                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 460                                    size <= 32 ? 32 : size );
 461                 u_modes[size] = mode;
 462         }
 463
 464         char name[32];
 465
 466         snprintf(name, sizeof(name), "U%u", size);
 467         ident *id = new_id_from_str(name);
 468         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 469         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 470         set_primitive_base_type(res, base_tp);
 471
 472         return res;
 473 }
 474
 475 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 476 {
 477         type_t *base = skip_typeref(type->base_type);
 478         assert(base->kind == TYPE_ATOMIC);
 479         ir_type *irbase = get_ir_type(base);
 480
 481         unsigned size = fold_constant(type->size);
 482
 483         assert(!is_type_float(base));
 484         if(is_type_signed(base)) {
 485                 return get_signed_int_type_for_bit_size(irbase, size);
 486         } else {
 487                 return get_unsigned_int_type_for_bit_size(irbase, size);
 488         }
 489 }
 490
 491 #define INVALID_TYPE ((ir_type_ptr)-1)
 492
 493 enum {
 494         COMPOUND_IS_STRUCT = false,
 495         COMPOUND_IS_UNION  = true
 496 };
 497
 498 /**
 499  * Construct firm type from ast struct tyep.
 500  *
 501  * As anonymous inner structs get flattened to a single firm type, we might get
 502  * irtype, outer_offset and out_align passed (they represent the position of
 503  * the anonymous inner struct inside the resulting firm struct)
 504  */
 505 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 506                                      size_t *outer_offset, size_t *outer_align,
 507                                      bool incomplete, bool is_union)
 508 {
 509         declaration_t      *declaration = type->declaration;
 510         declaration_kind_t  kind        = declaration->declaration_kind;
 511
 512         if(kind == DECLARATION_KIND_COMPOUND_TYPE_COMPLETE
 513                         || (kind == DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE
 514                                 && incomplete))
 515                 return declaration->v.irtype;
 516
 517         size_t align_all  = 1;
 518         size_t offset     = 0;
 519         size_t bit_offset = 0;
 520         size_t size       = 0;
 521
 522         if(irtype == NULL) {
 523                 symbol_t *symbol = declaration->symbol;
 524                 ident    *id;
 525                 if(symbol != NULL) {
 526                         id = new_id_from_str(symbol->string);
 527                 } else {
 528                         if (is_union) {
 529                                 id = id_unique("__anonymous_union.%u");
 530                         } else {
 531                                 id = id_unique("__anonymous_struct.%u");
 532                         }
 533                 }
 534                 dbg_info *dbgi  = get_dbg_info(&type->base.source_position);
 535
 536                 if (is_union) {
 537                         irtype = new_d_type_union(id, dbgi);
 538                 } else {
 539                         irtype = new_d_type_struct(id, dbgi);
 540                 }
 541
 542                 declaration->declaration_kind
 543                         = DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE;
 544                 declaration->v.irtype         = irtype;
 545                 //type->base.firm_type          = irtype;
 546         } else {
 547                 offset    = *outer_offset;
 548                 align_all = *outer_align;
 549         }
 550
 551         if(incomplete)
 552                 return irtype;
 553
 554         declaration->declaration_kind = DECLARATION_KIND_COMPOUND_TYPE_COMPLETE;
 555
 556         declaration_t *entry = declaration->scope.declarations;
 557         for( ; entry != NULL; entry = entry->next) {
 558                 if(entry->namespc != NAMESPACE_NORMAL)
 559                         continue;
 560
 561                 size_t prev_offset = offset;
 562
 563                 symbol_t *symbol     = entry->symbol;
 564                 type_t   *entry_type = skip_typeref(entry->type);
 565                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 566
 567                 ident    *ident;
 568                 if(symbol != NULL) {
 569                         ident = new_id_from_str(symbol->string);
 570                 } else {
 571                         if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
 572                                 create_compound_type(&entry_type->compound, irtype, &offset,
 573                                                      &align_all, false, COMPOUND_IS_STRUCT);
 574                                 goto finished_member;
 575                         } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
 576                                 create_compound_type(&entry_type->compound, irtype, &offset,
 577                                                      &align_all, false, COMPOUND_IS_UNION);
 578                                 goto finished_member;
 579                         } else {
 580                                 assert(entry_type->kind == TYPE_BITFIELD);
 581                         }
 582                         ident = id_unique("anon.%u");
 583                 }
 584
 585                 ir_type *base_irtype;
 586                 if(entry_type->kind == TYPE_BITFIELD) {
 587                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 588                 } else {
 589                         base_irtype = get_ir_type(entry_type);
 590                 }
 591
 592                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 593                 size_t misalign        = offset % entry_alignment;
 594
 595                 ir_type   *entry_irtype = get_ir_type(entry_type);
 596                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 597
 598                 size_t base;
 599                 size_t bits_remainder;
 600                 if(entry_type->kind == TYPE_BITFIELD) {
 601                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 602                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 603
 604                         if(size_bits > rest_size_bits) {
 605                                 /* start a new bucket */
 606                                 offset     += entry_alignment - misalign;
 607                                 bit_offset  = 0;
 608
 609                                 base           = offset;
 610                                 bits_remainder = 0;
 611                         } else {
 612                                 /* put into current bucket */
 613                                 base           = offset - misalign;
 614                                 bits_remainder = misalign * 8 + bit_offset;
 615                         }
 616
 617                         offset     += size_bits / 8;
 618                         bit_offset  = bit_offset + (size_bits % 8);
 619                 } else {
 620                         size_t entry_size = get_type_size_bytes(base_irtype);
 621                         if(misalign > 0 || bit_offset > 0)
 622                                 offset += entry_alignment - misalign;
 623
 624                         base           = offset;
 625                         bits_remainder = 0;
 626                         offset        += entry_size;
 627                         bit_offset     = 0;
 628                 }
 629
 630                 if(entry_alignment > align_all) {
 631                         if(entry_alignment % align_all != 0) {
 632                                 panic("uneven alignments not supported yet");
 633                         }
 634                         align_all = entry_alignment;
 635                 }
 636
 637                 set_entity_offset(entity, base);
 638                 set_entity_offset_bits_remainder(entity,
 639                                                  (unsigned char) bits_remainder);
 640                 //add_struct_member(irtype, entity);
 641                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 642                 assert(entry->v.entity == NULL);
 643                 entry->v.entity         = entity;
 644
 645 finished_member:
 646                 if (is_union) {
 647                         size_t entry_size = offset - prev_offset;
 648                         if (entry_size > size) {
 649                                 size = entry_size;
 650                         }
 651                         offset     = 0;
 652                         bit_offset = 0;
 653                 }
 654         }
 655
 656         if (!is_union) {
 657                 size = offset;
 658         }
 659
 660         size_t misalign = offset % align_all;
 661         if(misalign > 0 || bit_offset > 0) {
 662                 size += align_all - misalign;
 663         }
 664
 665         if(outer_offset != NULL) {
 666                 if (!is_union) {
 667                         *outer_offset = offset;
 668                 } else {
 669                         *outer_offset += size;
 670                 }
 671
 672                 if (align_all > *outer_align) {
 673                         if(align_all % *outer_align != 0) {
 674                                 panic("uneven alignments not supported yet");
 675                         }
 676                         *outer_align = align_all;
 677                 }
 678         } else {
 679                 set_type_alignment_bytes(irtype, align_all);
 680                 set_type_size_bytes(irtype, size);
 681                 set_type_state(irtype, layout_fixed);
 682         }
 683
 684         return irtype;
 685 }
 686
 687 static ir_type *create_enum_type(enum_type_t *const type)
 688 {
 689         type->base.firm_type = ir_type_int;
 690
 691         ir_mode *const mode    = mode_int;
 692         tarval  *const one     = get_mode_one(mode);
 693         tarval  *      tv_next = get_tarval_null(mode);
 694
 695         declaration_t *declaration = type->declaration->next;
 696         for (; declaration != NULL; declaration = declaration->next) {
 697                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 698                         break;
 699
 700                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 701
 702                 expression_t *const init = declaration->init.enum_value;
 703                 if (init != NULL) {
 704                         ir_node *const cnst = expression_to_firm(init);
 705                         if (!is_Const(cnst)) {
 706                                 panic("couldn't fold constant");
 707                         }
 708                         tv_next = get_Const_tarval(cnst);
 709                 }
 710                 declaration->v.enum_val = tv_next;
 711                 tv_next = tarval_add(tv_next, one);
 712         }
 713
 714         return ir_type_int;
 715 }
 716
 717 static ir_type *get_ir_type_incomplete(type_t *type)
 718 {
 719         assert(type != NULL);
 720         type = skip_typeref(type);
 721
 722         if (type->base.firm_type != NULL) {
 723                 assert(type->base.firm_type != INVALID_TYPE);
 724                 return type->base.firm_type;
 725         }
 726
 727         switch (type->kind) {
 728         case TYPE_COMPOUND_STRUCT:
 729                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 730                                             true, COMPOUND_IS_STRUCT);
 731                 break;
 732         case TYPE_COMPOUND_UNION:
 733                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 734                                             true, COMPOUND_IS_UNION);
 735         default:
 736                 return get_ir_type(type);
 737         }
 738 }
 739
 740 static ir_type *get_ir_type(type_t *type)
 741 {
 742         assert(type != NULL);
 743
 744         type = skip_typeref(type);
 745
 746         if (type->base.firm_type != NULL) {
 747                 assert(type->base.firm_type != INVALID_TYPE);
 748                 return type->base.firm_type;
 749         }
 750
 751         ir_type *firm_type = NULL;
 752         switch (type->kind) {
 753         case TYPE_ERROR:
 754                 panic("error type occurred");
 755         case TYPE_ATOMIC:
 756                 firm_type = create_atomic_type(&type->atomic);
 757                 break;
 758         case TYPE_COMPLEX:
 759                 firm_type = create_complex_type(&type->complex);
 760                 break;
 761         case TYPE_IMAGINARY:
 762                 firm_type = create_imaginary_type(&type->imaginary);
 763                 break;
 764         case TYPE_FUNCTION:
 765                 firm_type = create_method_type(&type->function);
 766                 break;
 767         case TYPE_POINTER:
 768                 firm_type = create_pointer_type(&type->pointer);
 769                 break;
 770         case TYPE_ARRAY:
 771                 firm_type = create_array_type(&type->array);
 772                 break;
 773         case TYPE_COMPOUND_STRUCT:
 774                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 775                                                  false, COMPOUND_IS_STRUCT);
 776                 break;
 777         case TYPE_COMPOUND_UNION:
 778                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 779                                                  false, COMPOUND_IS_UNION);
 780                 break;
 781         case TYPE_ENUM:
 782                 firm_type = create_enum_type(&type->enumt);
 783                 break;
 784         case TYPE_BUILTIN:
 785                 firm_type = get_ir_type(type->builtin.real_type);
 786                 break;
 787         case TYPE_BITFIELD:
 788                 firm_type = create_bitfield_type(&type->bitfield);
 789                 break;
 790
 791         case TYPE_TYPEOF:
 792         case TYPE_TYPEDEF:
 793         case TYPE_INVALID:
 794                 break;
 795         }
 796         if(firm_type == NULL)
 797                 panic("unknown type found");
 798
 799         type->base.firm_type = firm_type;
 800         return firm_type;
 801 }
 802
 803 static inline ir_mode *get_ir_mode(type_t *type)
 804 {
 805         ir_type *irtype = get_ir_type(type);
 806
 807         /* firm doesn't report a mode for arrays somehow... */
 808         if(is_Array_type(irtype)) {
 809                 return mode_P_data;
 810         }
 811
 812         ir_mode *mode = get_type_mode(irtype);
 813         assert(mode != NULL);
 814         return mode;
 815 }
 816
 817 static ident *predef_idents[rts_max];
 818
 819 /** Names of the runtime functions. */
 820 static const struct {
 821         int        id;           /**< the rts id */
 822         int        n_res;        /**< number of return values */
 823         const char *name;        /**< the name of the rts function */
 824         int        n_params;     /**< number of parameters */
 825         unsigned   flags;        /**< language flags */
 826 } rts_data[] = {
 827         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 828         { rts_abort,      0, "abort",        0, _C89 },
 829         { rts_abs,        1, "abs",          1, _C89 },
 830         { rts_labs,       1, "labs",         1, _C89 },
 831         { rts_llabs,      1, "llabs",        1, _C99 },
 832         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 833
 834         { rts_fabs,       1, "fabs",         1, _C89 },
 835         { rts_sqrt,       1, "sqrt",         1, _C89 },
 836         { rts_cbrt,       1, "cbrt",         1, _C99 },
 837         { rts_exp,        1, "exp",          1, _C89 },
 838         { rts_exp2,       1, "exp2",         1, _C89 },
 839         { rts_exp10,      1, "exp10",        1, _GNUC },
 840         { rts_log,        1, "log",          1, _C89 },
 841         { rts_log2,       1, "log2",         1, _C89 },
 842         { rts_log10,      1, "log10",        1, _C89 },
 843         { rts_pow,        1, "pow",          2, _C89 },
 844         { rts_sin,        1, "sin",          1, _C89 },
 845         { rts_cos,        1, "cos",          1, _C89 },
 846         { rts_tan,        1, "tan",          1, _C89 },
 847         { rts_asin,       1, "asin",         1, _C89 },
 848         { rts_acos,       1, "acos",         1, _C89 },
 849         { rts_atan,       1, "atan",         1, _C89 },
 850         { rts_sinh,       1, "sinh",         1, _C89 },
 851         { rts_cosh,       1, "cosh",         1, _C89 },
 852         { rts_tanh,       1, "tanh",         1, _C89 },
 853
 854         { rts_fabsf,      1, "fabsf",        1, _C99 },
 855         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 856         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 857         { rts_expf,       1, "expf",         1, _C99 },
 858         { rts_exp2f,      1, "exp2f",        1, _C99 },
 859         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 860         { rts_logf,       1, "logf",         1, _C99 },
 861         { rts_log2f,      1, "log2f",        1, _C99 },
 862         { rts_log10f,     1, "log10f",       1, _C99 },
 863         { rts_powf,       1, "powf",         2, _C99 },
 864         { rts_sinf,       1, "sinf",         1, _C99 },
 865         { rts_cosf,       1, "cosf",         1, _C99 },
 866         { rts_tanf,       1, "tanf",         1, _C99 },
 867         { rts_asinf,      1, "asinf",        1, _C99 },
 868         { rts_acosf,      1, "acosf",        1, _C99 },
 869         { rts_atanf,      1, "atanf",        1, _C99 },
 870         { rts_sinhf,      1, "sinhf",        1, _C99 },
 871         { rts_coshf,      1, "coshf",        1, _C99 },
 872         { rts_tanhf,      1, "tanhf",        1, _C99 },
 873
 874         { rts_fabsl,      1, "fabsl",        1, _C99 },
 875         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 876         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 877         { rts_expl,       1, "expl",         1, _C99 },
 878         { rts_exp2l,      1, "exp2l",        1, _C99 },
 879         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 880         { rts_logl,       1, "logl",         1, _C99 },
 881         { rts_log2l,      1, "log2l",        1, _C99 },
 882         { rts_log10l,     1, "log10l",       1, _C99 },
 883         { rts_powl,       1, "powl",         2, _C99 },
 884         { rts_sinl,       1, "sinl",         1, _C99 },
 885         { rts_cosl,       1, "cosl",         1, _C99 },
 886         { rts_tanl,       1, "tanl",         1, _C99 },
 887         { rts_asinl,      1, "asinl",        1, _C99 },
 888         { rts_acosl,      1, "acosl",        1, _C99 },
 889         { rts_atanl,      1, "atanl",        1, _C99 },
 890         { rts_sinhl,      1, "sinhl",        1, _C99 },
 891         { rts_coshl,      1, "coshl",        1, _C99 },
 892         { rts_tanhl,      1, "tanhl",        1, _C99 },
 893
 894         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 895         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 896         { rts_strcmp,     1, "strcmp",       2, _C89 },
 897         { rts_strncmp,    1, "strncmp",      3, _C89 }
 898 };
 899
 900 /**
 901  * Mangles an entity linker (ld) name for win32 usage.
 902  *
 903  * @param ent          the entity to be mangled
 904  * @param declaration  the declaration
 905  */
 906 static ident *create_ld_ident_win32(ir_entity *ent, declaration_t *declaration)
 907 {
 908         ident *id;
 909
 910         if (is_Method_type(get_entity_type(ent)))
 911                 id = decorate_win32_c_fkt(ent, get_entity_ident(ent));
 912         else {
 913                 /* always add an underscore in win32 */
 914                 id = mangle(id_underscore, get_entity_ident(ent));
 915         }
 916
 917         decl_modifiers_t decl_modifiers = declaration->decl_modifiers;
 918         if (decl_modifiers & DM_DLLIMPORT) {
 919                 /* add prefix for imported symbols */
 920                 id = mangle(id_imp, id);
 921         }
 922         return id;
 923 }
 924
 925 /**
 926  * Mangles an entity linker (ld) name for Linux ELF usage.
 927  *
 928  * @param ent          the entity to be mangled
 929  * @param declaration  the declaration
 930  */
 931 static ident *create_ld_ident_linux_elf(ir_entity *entity,
 932                                         declaration_t *declaration)
 933 {
 934         (void) declaration;
 935         return get_entity_ident(entity);
 936 }
 937
 938 /**
 939  * Mangles an entity linker (ld) name for Mach-O usage.
 940  *
 941  * @param ent          the entity to be mangled
 942  * @param declaration  the declaration
 943  */
 944 static ident *create_ld_ident_macho(ir_entity *ent, declaration_t *declaration)
 945 {
 946         (void) declaration;
 947         ident *id = mangle(id_underscore, get_entity_ident(ent));
 948         return id;
 949 }
 950
 951 typedef ident* (*create_ld_ident_func)(ir_entity *entity,
 952                                        declaration_t *declaration);
 953 create_ld_ident_func  create_ld_ident = create_ld_ident_linux_elf;
 954
 955 static ir_entity* get_function_entity(declaration_t *declaration)
 956 {
 957         if(declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
 958                 return declaration->v.entity;
 959         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
 960
 961         symbol_t *symbol = declaration->symbol;
 962         ident    *id     = new_id_from_str(symbol->string);
 963
 964         ir_type  *global_type    = get_glob_type();
 965         ir_type  *ir_type_method = get_ir_type(declaration->type);
 966         assert(is_Method_type(ir_type_method));
 967
 968         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
 969         ir_entity *const entity = new_d_entity(global_type, id, ir_type_method, dbgi);
 970         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
 971         if(declaration->storage_class == STORAGE_CLASS_STATIC &&
 972                 declaration->init.statement == NULL) {
 973                 /* this entity was declared, but never defined */
 974                 set_entity_peculiarity(entity, peculiarity_description);
 975         }
 976         if(declaration->storage_class == STORAGE_CLASS_STATIC
 977                         || declaration->is_inline) {
 978                 set_entity_visibility(entity, visibility_local);
 979         } else if(declaration->init.statement != NULL) {
 980                 set_entity_visibility(entity, visibility_external_visible);
 981         } else {
 982                 set_entity_visibility(entity, visibility_external_allocated);
 983
 984                 /* We should check for file scope here, but as long as we compile C only
 985                    this is not needed. */
 986                 int    n_params = get_method_n_params(ir_type_method);
 987                 int    n_res    = get_method_n_ress(ir_type_method);
 988                 int    i;
 989
 990                 if (n_params == 0 && n_res == 0 && id == predef_idents[rts_abort]) {
 991                         /* found abort(), store for later */
 992                         //abort_ent = ent;
 993                         //abort_tp  = ftype;
 994                 } else {
 995                         if (! firm_opt.freestanding) {
 996                                 /* check for a known runtime function */
 997                                 for (i = 0; i < rts_max; ++i) {
 998                                         /* ignore those rts functions not necessary needed for current mode */
 999                                         if ((c_mode & rts_data[i].flags) == 0)
1000                                                 continue;
1001                                         if (n_params == rts_data[i].n_params && n_res == rts_data[i].n_res &&
1002                                                 id == predef_idents[rts_data[i].id])
1003                                                 rts_entities[rts_data[i].id] = entity;
1004                                 }
1005                         }
1006                 }
1007         }
1008         set_entity_allocation(entity, allocation_static);
1009
1010         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1011         declaration->v.entity         = entity;
1012
1013         return entity;
1014 }
1015
1016 static ir_node *const_to_firm(const const_expression_t *cnst)
1017 {
1018         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1019         ir_mode  *mode = get_ir_mode(cnst->base.type);
1020
1021         char    buf[128];
1022         tarval *tv;
1023         size_t  len;
1024         if(mode_is_float(mode)) {
1025                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1026         } else {
1027                 if(mode_is_signed(mode)) {
1028                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1029                 } else {
1030                         len = snprintf(buf, sizeof(buf), "%llu",
1031                                        (unsigned long long) cnst->v.int_value);
1032                 }
1033                 tv = new_tarval_from_str(buf, len, mode);
1034         }
1035
1036         return new_d_Const(dbgi, mode, tv);
1037 }
1038
1039 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1040 {
1041         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1042         ir_mode  *mode = get_ir_mode(cnst->base.type);
1043
1044         long long int v = 0;
1045         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1046                 if (char_is_signed) {
1047                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1048                 } else {
1049                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1050                 }
1051         }
1052         char    buf[128];
1053         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1054         tarval *tv = new_tarval_from_str(buf, len, mode);
1055
1056         return new_d_Const(dbgi, mode, tv);
1057 }
1058
1059 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1060 {
1061         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1062         ir_mode  *mode = get_ir_mode(cnst->base.type);
1063
1064         long long int v = cnst->v.wide_character.begin[0];
1065
1066         char    buf[128];
1067         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1068         tarval *tv = new_tarval_from_str(buf, len, mode);
1069
1070         return new_d_Const(dbgi, mode, tv);
1071 }
1072
1073 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1074                               ir_entity *entity)
1075 {
1076         assert(entity != NULL);
1077         union symconst_symbol sym;
1078         sym.entity_p = entity;
1079         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1080 }
1081
1082 static ir_node *string_to_firm(const source_position_t *const src_pos,
1083                                const char *const id_prefix,
1084                                const string_t *const value)
1085 {
1086         ir_type  *const global_type = get_glob_type();
1087         dbg_info *const dbgi        = get_dbg_info(src_pos);
1088         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1089                                                        ir_type_const_char, dbgi);
1090
1091         ident     *const id     = id_unique(id_prefix);
1092         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1093         set_entity_ld_ident(entity, id);
1094         set_entity_variability(entity, variability_constant);
1095         set_entity_allocation(entity, allocation_static);
1096
1097         ir_type *const elem_type = ir_type_const_char;
1098         ir_mode *const mode      = get_type_mode(elem_type);
1099
1100         const char* const string = value->begin;
1101         const size_t      slen   = value->size;
1102
1103         set_array_lower_bound_int(type, 0, 0);
1104         set_array_upper_bound_int(type, 0, slen);
1105         set_type_size_bytes(type, slen);
1106         set_type_state(type, layout_fixed);
1107
1108         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1109         for(size_t i = 0; i < slen; ++i) {
1110                 tvs[i] = new_tarval_from_long(string[i], mode);
1111         }
1112
1113         set_array_entity_values(entity, tvs, slen);
1114         free(tvs);
1115
1116         return create_symconst(dbgi, mode_P_data, entity);
1117 }
1118
1119 static ir_node *string_literal_to_firm(
1120                 const string_literal_expression_t* literal)
1121 {
1122         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1123                               &literal->value);
1124 }
1125
1126 static ir_node *wide_string_literal_to_firm(
1127         const wide_string_literal_expression_t* const literal)
1128 {
1129         ir_type *const global_type = get_glob_type();
1130         ir_type *const elem_type   = ir_type_wchar_t;
1131         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1132         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1133                                                     elem_type, dbgi);
1134
1135         ident     *const id     = id_unique("Lstr.%u");
1136         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1137         set_entity_ld_ident(entity, id);
1138         set_entity_variability(entity, variability_constant);
1139         set_entity_allocation(entity, allocation_static);
1140
1141         ir_mode *const mode      = get_type_mode(elem_type);
1142
1143         const wchar_rep_t *const string = literal->value.begin;
1144         const size_t             slen   = literal->value.size;
1145
1146         set_array_lower_bound_int(type, 0, 0);
1147         set_array_upper_bound_int(type, 0, slen);
1148         set_type_size_bytes(type, slen);
1149         set_type_state(type, layout_fixed);
1150
1151         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1152         for(size_t i = 0; i < slen; ++i) {
1153                 tvs[i] = new_tarval_from_long(string[i], mode);
1154         }
1155
1156         set_array_entity_values(entity, tvs, slen);
1157         free(tvs);
1158
1159         return create_symconst(dbgi, mode_P_data, entity);
1160 }
1161
1162 static ir_node *deref_address(type_t *const type, ir_node *const addr,
1163                               dbg_info *const dbgi)
1164 {
1165         ir_type *irtype = get_ir_type(type);
1166         if (is_compound_type(irtype)
1167                         || is_Method_type(irtype)
1168                         || is_Array_type(irtype)) {
1169                 return addr;
1170         }
1171
1172         ir_mode *const mode     = get_type_mode(irtype);
1173         ir_node *const memory   = get_store();
1174         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1175         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1176         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1177
1178         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1179                 set_Load_volatility(load, volatility_is_volatile);
1180         }
1181
1182         set_store(load_mem);
1183         return load_res;
1184 }
1185
1186 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1187 {
1188         ir_mode *mode = get_irn_mode(node);
1189
1190         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1191                 return node;
1192         if (!mode_is_float(mode))
1193                 return node;
1194
1195         /* check if there is already a Conv */
1196         if (get_irn_op(node) == op_Conv) {
1197                 /* convert it into a strict Conv */
1198                 set_Conv_strict(node, 1);
1199                 return node;
1200         }
1201
1202         /* otherwise create a new one */
1203         return new_d_strictConv(dbgi, node, mode);
1204 }
1205
1206 static ir_node *get_global_var_address(dbg_info *const dbgi,
1207                                        const declaration_t *const decl)
1208 {
1209         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1210
1211         ir_entity *const entity = decl->v.entity;
1212         switch ((storage_class_tag_t)decl->storage_class) {
1213                 case STORAGE_CLASS_THREAD:
1214                 case STORAGE_CLASS_THREAD_EXTERN:
1215                 case STORAGE_CLASS_THREAD_STATIC: {
1216                         ir_node *const no_mem = new_NoMem();
1217                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1218                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1219                 }
1220
1221                 default:
1222                         return create_symconst(dbgi, mode_P_data, entity);
1223         }
1224 }
1225
1226 /* Returns the correct base address depending on whether it is a parameter or a
1227  * normal local variable */
1228 static ir_node *get_local_frame(ir_entity *const ent)
1229 {
1230         ir_graph      *const irg   = current_ir_graph;
1231         const ir_type *const owner = get_entity_owner(ent);
1232         if (owner == get_irg_frame_type(irg)) {
1233                 return get_irg_frame(irg);
1234         } else {
1235                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1236                 return get_irg_value_param_base(irg);
1237         }
1238 }
1239
1240 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1241 {
1242         ir_mode *value_mode = get_irn_mode(value);
1243
1244         if (value_mode == dest_mode || is_Bad(value))
1245                 return value;
1246
1247         if(dest_mode == mode_b) {
1248                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1249                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1250                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1251                 return proj;
1252         }
1253
1254         return new_d_Conv(dbgi, value, dest_mode);
1255 }
1256
1257 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1258 {
1259         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1260         declaration_t *declaration = ref->declaration;
1261         type_t        *type        = skip_typeref(declaration->type);
1262
1263         switch((declaration_kind_t) declaration->declaration_kind) {
1264         case DECLARATION_KIND_UNKNOWN:
1265                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
1266                         break;
1267                 }
1268                 get_ir_type(type);
1269                 /* FALLTHROUGH */
1270
1271         case DECLARATION_KIND_ENUM_ENTRY: {
1272                 ir_mode *const mode = get_ir_mode(type);
1273                 return new_Const(mode, declaration->v.enum_val);
1274         }
1275
1276         case DECLARATION_KIND_LOCAL_VARIABLE: {
1277                 ir_mode *const mode = get_ir_mode(type);
1278                 return get_value(declaration->v.value_number, mode);
1279         }
1280         case DECLARATION_KIND_FUNCTION: {
1281                 ir_mode *const mode = get_ir_mode(type);
1282                 return create_symconst(dbgi, mode, declaration->v.entity);
1283         }
1284         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1285                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1286                 return deref_address(declaration->type, addr, dbgi);
1287         }
1288
1289         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1290                 ir_entity *entity = declaration->v.entity;
1291                 ir_node   *frame  = get_local_frame(entity);
1292                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1293                 return deref_address(declaration->type, sel, dbgi);
1294         }
1295
1296         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1297                 return declaration->v.vla_base;
1298
1299         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1300         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1301         case DECLARATION_KIND_COMPOUND_MEMBER:
1302         case DECLARATION_KIND_LABEL_BLOCK:
1303                 panic("not implemented reference type");
1304         }
1305
1306         panic("reference to declaration with unknown type found");
1307 }
1308
1309 static ir_node *reference_addr(const reference_expression_t *ref)
1310 {
1311         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1312         declaration_t *declaration = ref->declaration;
1313
1314         switch((declaration_kind_t) declaration->declaration_kind) {
1315         case DECLARATION_KIND_UNKNOWN:
1316                 break;
1317         case DECLARATION_KIND_LOCAL_VARIABLE:
1318                 panic("local variable without entity has no address");
1319         case DECLARATION_KIND_FUNCTION: {
1320                 type_t *const  type = skip_typeref(ref->base.type);
1321                 ir_mode *const mode = get_ir_mode(type);
1322                 return create_symconst(dbgi, mode, declaration->v.entity);
1323         }
1324         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1325                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1326                 return addr;
1327         }
1328         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1329                 ir_entity *entity = declaration->v.entity;
1330                 ir_node   *frame  = get_local_frame(entity);
1331                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1332
1333                 return sel;
1334         }
1335
1336         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1337                 return declaration->v.vla_base;
1338
1339         case DECLARATION_KIND_ENUM_ENTRY:
1340                 panic("trying to reference enum entry");
1341
1342         case DECLARATION_KIND_COMPOUND_TYPE_INCOMPLETE:
1343         case DECLARATION_KIND_COMPOUND_TYPE_COMPLETE:
1344         case DECLARATION_KIND_COMPOUND_MEMBER:
1345         case DECLARATION_KIND_LABEL_BLOCK:
1346                 panic("not implemented reference type");
1347         }
1348
1349         panic("reference to declaration with unknown type found");
1350 }
1351
1352 static ir_node *process_builtin_call(const call_expression_t *call)
1353 {
1354         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1355
1356         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1357         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1358
1359         type_t *type = skip_typeref(builtin->base.type);
1360         assert(is_type_pointer(type));
1361
1362         type_t   *function_type = skip_typeref(type->pointer.points_to);
1363         symbol_t *symbol        = builtin->symbol;
1364
1365         switch(symbol->ID) {
1366         case T___builtin_alloca: {
1367                 if(call->arguments == NULL || call->arguments->next != NULL) {
1368                         panic("invalid number of parameters on __builtin_alloca");
1369                 }
1370                 expression_t *argument = call->arguments->expression;
1371                 ir_node      *size     = expression_to_firm(argument);
1372
1373                 ir_node *store  = get_store();
1374                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1375                                               stack_alloc);
1376                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1377                 set_store(proj_m);
1378                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1379
1380                 return res;
1381         }
1382         case T___builtin_huge_val: {
1383                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1384                 tarval  *tv   = get_mode_infinite(mode);
1385                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1386                 return   res;
1387         }
1388         case T___builtin_nan:
1389         case T___builtin_nanf:
1390         case T___builtin_nand: {
1391                 /* Ignore string for now... */
1392                 assert(is_type_function(function_type));
1393                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1394                 tarval  *tv   = get_mode_NAN(mode);
1395                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1396                 return res;
1397         }
1398         case T___builtin_va_end:
1399                 return NULL;
1400         default:
1401                 panic("Unsupported builtin found\n");
1402         }
1403 }
1404
1405 static ir_node *call_expression_to_firm(const call_expression_t *call)
1406 {
1407         assert(get_cur_block() != NULL);
1408
1409         expression_t *function = call->function;
1410         if(function->kind == EXPR_BUILTIN_SYMBOL) {
1411                 return process_builtin_call(call);
1412         }
1413         ir_node *callee = expression_to_firm(function);
1414
1415         type_t *type = skip_typeref(function->base.type);
1416         assert(is_type_pointer(type));
1417         pointer_type_t *pointer_type = &type->pointer;
1418         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1419         assert(is_type_function(points_to));
1420         function_type_t *function_type = &points_to->function;
1421
1422         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1423
1424         int      n_parameters = 0;
1425         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1426         ir_type *new_method_type = NULL;
1427         if(function_type->variadic || function_type->unspecified_parameters) {
1428                 const call_argument_t *argument = call->arguments;
1429                 for( ; argument != NULL; argument = argument->next) {
1430                         ++n_parameters;
1431                 }
1432
1433                 /* we need to construct a new method type matching the call
1434                  * arguments... */
1435                 int n_res       = get_method_n_ress(ir_method_type);
1436                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1437                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1438                                                     n_parameters, n_res, dbgi);
1439                 set_method_calling_convention(new_method_type,
1440                                get_method_calling_convention(ir_method_type));
1441                 set_method_additional_properties(new_method_type,
1442                                get_method_additional_properties(ir_method_type));
1443                 set_method_variadicity(new_method_type,
1444                                        get_method_variadicity(ir_method_type));
1445
1446                 for(int i = 0; i < n_res; ++i) {
1447                         set_method_res_type(new_method_type, i,
1448                                             get_method_res_type(ir_method_type, i));
1449                 }
1450                 argument = call->arguments;
1451                 for(int i = 0; i < n_parameters; ++i, argument = argument->next) {
1452                         expression_t *expression = argument->expression;
1453                         ir_type      *irtype     = get_ir_type(expression->base.type);
1454                         set_method_param_type(new_method_type, i, irtype);
1455                 }
1456                 ir_method_type = new_method_type;
1457         } else {
1458                 n_parameters = get_method_n_params(ir_method_type);
1459         }
1460
1461         ir_node *in[n_parameters];
1462
1463         const call_argument_t *argument = call->arguments;
1464         for(int n = 0; n < n_parameters; ++n) {
1465                 expression_t *expression = argument->expression;
1466                 ir_node      *arg_node   = expression_to_firm(expression);
1467
1468                 arg_node = do_strict_conv(dbgi, arg_node);
1469
1470                 in[n] = arg_node;
1471
1472                 argument = argument->next;
1473         }
1474
1475         ir_node  *store = get_store();
1476         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1477                                      ir_method_type);
1478         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1479         set_store(mem);
1480
1481         type_t  *return_type = skip_typeref(function_type->return_type);
1482         ir_node *result      = NULL;
1483
1484         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1485                 ir_mode *mode;
1486                 if(is_type_scalar(return_type)) {
1487                         mode = get_ir_mode(return_type);
1488                 } else {
1489                         mode = mode_P_data;
1490                 }
1491                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1492                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1493         }
1494
1495         return result;
1496 }
1497
1498 static void statement_to_firm(statement_t *statement);
1499 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1500
1501 static ir_node *expression_to_addr(const expression_t *expression);
1502 static void create_condition_evaluation(const expression_t *expression,
1503                                         ir_node *true_block,
1504                                         ir_node *false_block);
1505
1506 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1507                          ir_node *value)
1508 {
1509         value = do_strict_conv(dbgi, value);
1510
1511         ir_node *memory = get_store();
1512
1513         if(is_type_scalar(type)) {
1514                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1515                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1516                 if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1517                         set_Store_volatility(store, volatility_is_volatile);
1518                 set_store(store_mem);
1519         } else {
1520                 ir_type *irtype    = get_ir_type(type);
1521                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1522                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1523                 set_store(copyb_mem);
1524         }
1525 }
1526
1527 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1528 {
1529         tarval *all_one   = get_mode_all_one(mode);
1530         int     mode_size = get_mode_size_bits(mode);
1531
1532         assert(offset >= 0 && size >= 0);
1533         assert(offset + size <= mode_size);
1534         if(size == mode_size) {
1535                 return all_one;
1536         }
1537
1538         long    shiftr    = get_mode_size_bits(mode) - size;
1539         long    shiftl    = offset;
1540         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1541         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1542         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1543         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1544
1545         return mask1;
1546 }
1547
1548 static void bitfield_store_to_firm(const unary_expression_t *expression,
1549                                    ir_node *value)
1550 {
1551         expression_t *select = expression->value;
1552         assert(select->kind == EXPR_SELECT);
1553         type_t       *type   = select->base.type;
1554         assert(type->kind == TYPE_BITFIELD);
1555         ir_mode      *mode   = get_ir_mode(type->bitfield.base_type);
1556         ir_node      *addr   = expression_to_addr(select);
1557
1558         assert(get_irn_mode(value) == mode || is_Bad(value));
1559
1560         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1561
1562         /* kill upper bits of value and shift to right position */
1563         ir_entity *entity       = select->select.compound_entry->v.entity;
1564         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1565         ir_type   *entity_type  = get_entity_type(entity);
1566         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1567
1568         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1569         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1570         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1571         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1572         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1573         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1574
1575         /* load current value */
1576         ir_node  *mem             = get_store();
1577         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1578         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1579         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1580         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1581         tarval   *inv_mask        = tarval_not(shift_mask);
1582         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1583         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1584
1585         /* construct new value and store */
1586         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1587         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1588         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1589         set_store(store_mem);
1590
1591         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1592                 set_Load_volatility(load, volatility_is_volatile);
1593                 set_Store_volatility(store, volatility_is_volatile);
1594         }
1595 }
1596
1597 static void set_value_for_expression(const expression_t *expression,
1598                                      ir_node *value)
1599 {
1600         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1601         value          = do_strict_conv(dbgi, value);
1602
1603         if(expression->kind == EXPR_REFERENCE) {
1604                 const reference_expression_t *ref = &expression->reference;
1605
1606                 declaration_t *declaration = ref->declaration;
1607                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1608                 if(declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1609                         set_value(declaration->v.value_number, value);
1610                         return;
1611                 }
1612         }
1613
1614         if(expression->kind == EXPR_UNARY_BITFIELD_EXTRACT) {
1615                 bitfield_store_to_firm(&expression->unary, value);
1616                 return;
1617         }
1618
1619         ir_node *addr = expression_to_addr(expression);
1620         type_t  *type = skip_typeref(expression->base.type);
1621         assign_value(dbgi, addr, type, value);
1622 }
1623
1624 static ir_node *create_incdec(const unary_expression_t *expression)
1625 {
1626         dbg_info     *dbgi  = get_dbg_info(&expression->base.source_position);
1627         type_t       *type  = skip_typeref(expression->base.type);
1628         ir_mode      *mode  = get_ir_mode(type);
1629         expression_t *value = expression->value;
1630
1631         ir_node *value_node = expression_to_firm(value);
1632
1633         ir_node *offset;
1634         if(is_type_pointer(type)) {
1635                 pointer_type_t *pointer_type = &type->pointer;
1636                 offset                       = get_type_size(pointer_type->points_to);
1637         } else {
1638                 assert(is_type_arithmetic(type));
1639                 offset = new_Const(mode, get_mode_one(mode));
1640         }
1641
1642         switch(expression->base.kind) {
1643         case EXPR_UNARY_POSTFIX_INCREMENT: {
1644                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1645                 set_value_for_expression(value, new_value);
1646                 return value_node;
1647         }
1648         case EXPR_UNARY_POSTFIX_DECREMENT: {
1649                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1650                 set_value_for_expression(value, new_value);
1651                 return value_node;
1652         }
1653         case EXPR_UNARY_PREFIX_INCREMENT: {
1654                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1655                 set_value_for_expression(value, new_value);
1656                 return new_value;
1657         }
1658         case EXPR_UNARY_PREFIX_DECREMENT: {
1659                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1660                 set_value_for_expression(value, new_value);
1661                 return new_value;
1662         }
1663         default:
1664                 panic("no incdec expr in create_incdec");
1665                 return NULL;
1666         }
1667 }
1668
1669 static bool is_local_variable(expression_t *expression)
1670 {
1671         if (expression->kind != EXPR_REFERENCE)
1672                 return false;
1673         reference_expression_t *ref_expr    = &expression->reference;
1674         declaration_t          *declaration = ref_expr->declaration;
1675         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1676 }
1677
1678 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1679 {
1680         switch(kind) {
1681         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1682         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1683         case EXPR_BINARY_NOTEQUAL:
1684                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1685         case EXPR_BINARY_ISLESS:
1686         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1687         case EXPR_BINARY_ISLESSEQUAL:
1688         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1689         case EXPR_BINARY_ISGREATER:
1690         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1691         case EXPR_BINARY_ISGREATEREQUAL:
1692         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1693         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1694
1695         default:
1696                 break;
1697         }
1698         panic("trying to get pn_Cmp from non-comparison binexpr type");
1699 }
1700
1701 /**
1702  * Handle the assume optimizer hint: check if a Confirm
1703  * node can be created.
1704  *
1705  * @param dbi    debug info
1706  * @param expr   the IL assume expression
1707  *
1708  * we support here only some simple cases:
1709  *  - var rel const
1710  *  - const rel val
1711  *  - var rel var
1712  */
1713 static ir_node *handle_assume_compare(dbg_info *dbi,
1714                                       const binary_expression_t *expression)
1715 {
1716         expression_t  *op1 = expression->left;
1717         expression_t  *op2 = expression->right;
1718         declaration_t *var2, *var = NULL;
1719         ir_node       *res = NULL;
1720         pn_Cmp         cmp_val;
1721
1722         cmp_val = get_pnc(expression->base.kind, op1->base.type);
1723
1724         if (is_local_variable(op1) && is_local_variable(op2)) {
1725         var  = op1->reference.declaration;
1726             var2 = op2->reference.declaration;
1727
1728                 type_t  *const type = skip_typeref(var->type);
1729                 ir_mode *const mode = get_ir_mode(type);
1730
1731                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1732                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1733
1734                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1735                 set_value(var2->v.value_number, res);
1736
1737                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1738                 set_value(var->v.value_number, res);
1739
1740                 return res;
1741         }
1742
1743         expression_t *con;
1744         if (is_local_variable(op1) && is_constant_expression(op2)) {
1745                 var = op1->reference.declaration;
1746                 con = op2;
1747         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
1748                 cmp_val = get_inversed_pnc(cmp_val);
1749                 var = op2->reference.declaration;
1750                 con = op1;
1751         }
1752
1753         if (var != NULL) {
1754                 type_t  *const type = skip_typeref(var->type);
1755                 ir_mode *const mode = get_ir_mode(type);
1756
1757                 res = get_value(var->v.value_number, mode);
1758                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
1759                 set_value(var->v.value_number, res);
1760         }
1761         return res;
1762 }
1763
1764 /**
1765  * Handle the assume optimizer hint.
1766  *
1767  * @param dbi    debug info
1768  * @param expr   the IL assume expression
1769  */
1770 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
1771         switch(expression->kind) {
1772         case EXPR_BINARY_EQUAL:
1773         case EXPR_BINARY_NOTEQUAL:
1774         case EXPR_BINARY_LESS:
1775         case EXPR_BINARY_LESSEQUAL:
1776         case EXPR_BINARY_GREATER:
1777         case EXPR_BINARY_GREATEREQUAL:
1778                 return handle_assume_compare(dbi, &expression->binary);
1779         default:
1780                 return NULL;
1781         }
1782 }
1783
1784 static ir_node *bitfield_extract_to_firm(const unary_expression_t *expression)
1785 {
1786         expression_t *select = expression->value;
1787         assert(select->kind == EXPR_SELECT);
1788
1789         type_t   *type     = select->base.type;
1790         assert(type->kind == TYPE_BITFIELD);
1791         ir_mode  *mode     = get_ir_mode(type->bitfield.base_type);
1792         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1793         ir_node  *addr     = expression_to_addr(select);
1794         ir_node  *mem      = get_store();
1795         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1796         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1797         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1798
1799         load_res           = create_conv(dbgi, load_res, mode_int);
1800
1801         set_store(load_mem);
1802
1803         /* kill upper bits */
1804         ir_entity *entity       = select->select.compound_entry->v.entity;
1805         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1806         ir_type   *entity_type  = get_entity_type(entity);
1807         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1808         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1809         assert(shift_bitsl >= 0);
1810         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1811         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1812         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1813
1814         long       shift_bitsr  = bitoffset + shift_bitsl;
1815         assert(shift_bitsr <= (long) machine_size);
1816         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1817         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1818         ir_node   *shiftr;
1819         if(mode_is_signed(mode)) {
1820                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1821         } else {
1822                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1823         }
1824
1825         return create_conv(dbgi, shiftr, mode);
1826 }
1827
1828 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1829 {
1830         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1831         type_t   *type = skip_typeref(expression->base.type);
1832
1833         if(expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
1834                 return expression_to_addr(expression->value);
1835
1836         const expression_t *value = expression->value;
1837
1838         switch(expression->base.kind) {
1839         case EXPR_UNARY_NEGATE: {
1840                 ir_node *value_node = expression_to_firm(value);
1841                 ir_mode *mode = get_ir_mode(type);
1842                 return new_d_Minus(dbgi, value_node, mode);
1843         }
1844         case EXPR_UNARY_PLUS:
1845                 return expression_to_firm(value);
1846         case EXPR_UNARY_BITWISE_NEGATE: {
1847                 ir_node *value_node = expression_to_firm(value);
1848                 ir_mode *mode = get_ir_mode(type);
1849                 return new_d_Not(dbgi, value_node, mode);
1850         }
1851         case EXPR_UNARY_NOT: {
1852                 ir_node *value_node = expression_to_firm(value);
1853                 ir_mode *mode = get_ir_mode(type);
1854                 if(get_irn_mode(value_node) != mode_b) {
1855                         value_node = create_conv(dbgi, value_node, mode_b);
1856                 }
1857                 value_node = new_d_Not(dbgi, value_node, mode_b);
1858                 if(mode != mode_b) {
1859                         value_node = create_conv(dbgi, value_node, mode);
1860                 }
1861                 return value_node;
1862         }
1863         case EXPR_UNARY_DEREFERENCE: {
1864                 ir_node *value_node = expression_to_firm(value);
1865                 type_t  *value_type = skip_typeref(value->base.type);
1866                 assert(is_type_pointer(value_type));
1867                 type_t  *points_to  = value_type->pointer.points_to;
1868                 return deref_address(points_to, value_node, dbgi);
1869         }
1870         case EXPR_UNARY_POSTFIX_INCREMENT:
1871         case EXPR_UNARY_POSTFIX_DECREMENT:
1872         case EXPR_UNARY_PREFIX_INCREMENT:
1873         case EXPR_UNARY_PREFIX_DECREMENT:
1874                 return create_incdec(expression);
1875         case EXPR_UNARY_CAST: {
1876                 ir_node *value_node = expression_to_firm(value);
1877                 if(is_type_scalar(type)) {
1878                         ir_mode *mode = get_ir_mode(type);
1879                         ir_node *node = create_conv(dbgi, value_node, mode);
1880                         node = do_strict_conv(dbgi, node);
1881                         return node;
1882                 } else {
1883                         /* make sure firm type is constructed */
1884                         (void) get_ir_type(type);
1885                         return value_node;
1886                 }
1887         }
1888         case EXPR_UNARY_CAST_IMPLICIT: {
1889                 ir_node *value_node = expression_to_firm(value);
1890                 if(is_type_scalar(type)) {
1891                         ir_mode *mode = get_ir_mode(type);
1892                         return create_conv(dbgi, value_node, mode);
1893                 } else {
1894                         return value_node;
1895                 }
1896         }
1897         case EXPR_UNARY_ASSUME:
1898                 if(firm_opt.confirm)
1899                         return handle_assume(dbgi, value);
1900                 else
1901                         return NULL;
1902         case EXPR_UNARY_BITFIELD_EXTRACT:
1903                 return bitfield_extract_to_firm(expression);
1904
1905         default:
1906                 break;
1907         }
1908         panic("invalid UNEXPR type found");
1909 }
1910
1911 static ir_node *produce_condition_result(const expression_t *expression,
1912                                          dbg_info *dbgi)
1913 {
1914         ir_mode *mode      = get_ir_mode(expression->base.type);
1915         ir_node *cur_block = get_cur_block();
1916
1917         ir_node *one_block = new_immBlock();
1918         ir_node *one       = new_Const(mode, get_mode_one(mode));
1919         ir_node *jmp_one   = new_d_Jmp(dbgi);
1920
1921         ir_node *zero_block = new_immBlock();
1922         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1923         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1924
1925         set_cur_block(cur_block);
1926         create_condition_evaluation(expression, one_block, zero_block);
1927         mature_immBlock(one_block);
1928         mature_immBlock(zero_block);
1929
1930         ir_node *common_block = new_immBlock();
1931         add_immBlock_pred(common_block, jmp_one);
1932         add_immBlock_pred(common_block, jmp_zero);
1933         mature_immBlock(common_block);
1934
1935         ir_node *in[2] = { one, zero };
1936         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1937
1938         return val;
1939 }
1940
1941 static ir_node *create_lazy_op(const binary_expression_t *expression)
1942 {
1943         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1944         type_t   *type = expression->base.type;
1945         ir_mode  *mode = get_ir_mode(type);
1946
1947         if(is_constant_expression(expression->left)) {
1948                 long val = fold_constant(expression->left);
1949                 expression_kind_t ekind = expression->base.kind;
1950                 if((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
1951                                 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
1952                         return expression_to_firm(expression->right);
1953                 } else {
1954                         assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
1955                                         || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
1956                         return new_Const(mode, get_mode_one(mode));
1957                 }
1958         }
1959
1960         return produce_condition_result((const expression_t*) expression, dbgi);
1961 }
1962
1963 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1964                                             ir_node *right, ir_mode *mode);
1965
1966 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1967                                         create_arithmetic_func func)
1968 {
1969         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
1970         ir_node  *left  = expression_to_firm(expression->left);
1971         ir_node  *right = expression_to_firm(expression->right);
1972         type_t   *type  = expression->right->base.type;
1973         /* be careful with the modes, because in arithmetic assign nodes only
1974          * the right operand has the mode of the arithmetic already */
1975         ir_mode  *mode  = get_ir_mode(type);
1976         left            = create_conv(dbgi, left, mode);
1977         ir_node  *res   = func(dbgi, left, right, mode);
1978
1979         return res;
1980 }
1981
1982 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1983                                    ir_node  *      integer,
1984                                    type_t   *const type,
1985                                    dbg_info *const dbgi,
1986                                    const create_arithmetic_func func)
1987 {
1988         pointer_type_t *const pointer_type = &type->pointer;
1989         type_t         *const points_to    = pointer_type->points_to;
1990         const unsigned        elem_size    = get_type_size_const(points_to);
1991
1992         assert(elem_size >= 1);
1993         if (elem_size > 1) {
1994                 integer             = create_conv(dbgi, integer, mode_int);
1995                 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
1996                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_int);
1997                 integer = mul;
1998         }
1999
2000         ir_mode *const mode = get_ir_mode(type);
2001         return func(dbgi, pointer, integer, mode);
2002 }
2003
2004 static ir_node *create_arithmetic_assign_binop(
2005                 const binary_expression_t *expression, create_arithmetic_func func)
2006 {
2007         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2008         type_t   *const type = skip_typeref(expression->base.type);
2009         ir_node  *value;
2010
2011         if (is_type_pointer(type)) {
2012                 ir_node *const pointer = expression_to_firm(expression->left);
2013                 ir_node *      integer = expression_to_firm(expression->right);
2014                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
2015         } else {
2016                 value = create_arithmetic_binop(expression, func);
2017         }
2018
2019         ir_mode *const mode = get_ir_mode(type);
2020         value = create_conv(dbgi, value, mode);
2021         set_value_for_expression(expression->left, value);
2022
2023         return value;
2024 }
2025
2026 static ir_node *create_add(const binary_expression_t *expression)
2027 {
2028         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2029         ir_node  *left  = expression_to_firm(expression->left);
2030         ir_node  *right = expression_to_firm(expression->right);
2031         type_t   *type  = expression->base.type;
2032
2033         expression_t *expr_left  = expression->left;
2034         expression_t *expr_right = expression->right;
2035         type_t       *type_left  = skip_typeref(expr_left->base.type);
2036         type_t       *type_right = skip_typeref(expr_right->base.type);
2037
2038         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2039                 ir_mode *const mode = get_ir_mode(type);
2040                 return new_d_Add(dbgi, left, right, mode);
2041         }
2042
2043         if (is_type_pointer(type_left)) {
2044                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
2045         } else {
2046                 assert(is_type_pointer(type_right));
2047                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
2048         }
2049 }
2050
2051 static ir_node *create_sub(const binary_expression_t *expression)
2052 {
2053         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2054         expression_t *const expr_left  = expression->left;
2055         expression_t *const expr_right = expression->right;
2056         ir_node      *const left       = expression_to_firm(expr_left);
2057         ir_node      *const right      = expression_to_firm(expr_right);
2058         type_t       *const type       = expression->base.type;
2059         type_t       *const type_left  = skip_typeref(expr_left->base.type);
2060         type_t       *const type_right = skip_typeref(expr_right->base.type);
2061
2062         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2063                 ir_mode *const mode = get_ir_mode(type);
2064                 return new_d_Sub(dbgi, left, right, mode);
2065         } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2066                 const pointer_type_t *const ptr_type = &type_left->pointer;
2067
2068                 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2069                 ir_mode *const mode      = get_ir_mode(type);
2070                 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2071                 ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2072                 ir_node *const no_mem    = new_NoMem();
2073                 ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size, mode,
2074                                                        op_pin_state_floats);
2075                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2076         }
2077
2078         assert(is_type_pointer(type_left));
2079         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
2080 }
2081
2082 static ir_node *create_shift(const binary_expression_t *expression)
2083 {
2084         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2085         ir_node  *left  = expression_to_firm(expression->left);
2086         ir_node  *right = expression_to_firm(expression->right);
2087         type_t   *type  = expression->base.type;
2088         ir_mode  *mode  = get_ir_mode(type);
2089
2090         /* firm always wants the shift count to be unsigned */
2091         right = create_conv(dbgi, right, mode_uint);
2092
2093         ir_node *res;
2094
2095         switch(expression->base.kind) {
2096         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2097         case EXPR_BINARY_SHIFTLEFT:
2098                 res = new_d_Shl(dbgi, left, right, mode);
2099                 break;
2100         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2101         case EXPR_BINARY_SHIFTRIGHT: {
2102                  expression_t *expr_left = expression->left;
2103                  type_t       *type_left = skip_typeref(expr_left->base.type);
2104
2105                  if(is_type_signed(type_left)) {
2106                         res = new_d_Shrs(dbgi, left, right, mode);
2107                  } else {
2108                          res = new_d_Shr(dbgi, left, right, mode);
2109                  }
2110                  break;
2111         }
2112         default:
2113                 panic("create shift op called for non-shift op");
2114         }
2115
2116         return res;
2117 }
2118
2119
2120 static ir_node *create_divmod(const binary_expression_t *expression)
2121 {
2122         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2123         ir_node  *left  = expression_to_firm(expression->left);
2124         ir_node  *right = expression_to_firm(expression->right);
2125         ir_node  *pin   = new_Pin(new_NoMem());
2126         /* be careful with the modes, because in arithmetic assign nodes only
2127          * the right operand has the mode of the arithmetic already */
2128         type_t   *type  = expression->right->base.type;
2129         ir_mode  *mode  = get_ir_mode(type);
2130         left            = create_conv(dbgi, left, mode);
2131         ir_node  *op;
2132         ir_node  *res;
2133
2134         switch (expression->base.kind) {
2135         case EXPR_BINARY_DIV:
2136         case EXPR_BINARY_DIV_ASSIGN:
2137                 if(mode_is_float(mode)) {
2138                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2139                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2140                 } else {
2141                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2142                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2143                 }
2144                 break;
2145
2146         case EXPR_BINARY_MOD:
2147         case EXPR_BINARY_MOD_ASSIGN:
2148                 assert(!mode_is_float(mode));
2149                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
2150                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2151                 break;
2152
2153         default: panic("unexpected binary expression type in create_divmod()");
2154         }
2155
2156         return res;
2157 }
2158
2159 static ir_node *create_arithmetic_assign_divmod(
2160                 const binary_expression_t *expression)
2161 {
2162         ir_node  *      value = create_divmod(expression);
2163         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2164         type_t   *const type  = expression->base.type;
2165         ir_mode  *const mode  = get_ir_mode(type);
2166
2167         assert(type->kind != TYPE_POINTER);
2168
2169         value = create_conv(dbgi, value, mode);
2170         set_value_for_expression(expression->left, value);
2171
2172         return value;
2173 }
2174
2175 static ir_node *create_arithmetic_assign_shift(
2176                 const binary_expression_t *expression)
2177 {
2178         ir_node  *      value = create_shift(expression);
2179         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2180         type_t   *const type  = expression->base.type;
2181         ir_mode  *const mode  = get_ir_mode(type);
2182
2183         value = create_conv(dbgi, value, mode);
2184         set_value_for_expression(expression->left, value);
2185
2186         return value;
2187 }
2188
2189 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2190 {
2191         expression_kind_t kind = expression->base.kind;
2192
2193         switch(kind) {
2194         case EXPR_BINARY_EQUAL:
2195         case EXPR_BINARY_NOTEQUAL:
2196         case EXPR_BINARY_LESS:
2197         case EXPR_BINARY_LESSEQUAL:
2198         case EXPR_BINARY_GREATER:
2199         case EXPR_BINARY_GREATEREQUAL:
2200         case EXPR_BINARY_ISGREATER:
2201         case EXPR_BINARY_ISGREATEREQUAL:
2202         case EXPR_BINARY_ISLESS:
2203         case EXPR_BINARY_ISLESSEQUAL:
2204         case EXPR_BINARY_ISLESSGREATER:
2205         case EXPR_BINARY_ISUNORDERED: {
2206                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2207                 ir_node *left  = expression_to_firm(expression->left);
2208                 ir_node *right = expression_to_firm(expression->right);
2209                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2210                 long     pnc   = get_pnc(kind, expression->left->base.type);
2211                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2212                 return proj;
2213         }
2214         case EXPR_BINARY_ASSIGN: {
2215                 ir_node *right = expression_to_firm(expression->right);
2216                 set_value_for_expression(expression->left, right);
2217
2218                 return right;
2219         }
2220         case EXPR_BINARY_ADD:
2221                 return create_add(expression);
2222         case EXPR_BINARY_SUB:
2223                 return create_sub(expression);
2224         case EXPR_BINARY_MUL:
2225                 return create_arithmetic_binop(expression, new_d_Mul);
2226         case EXPR_BINARY_BITWISE_AND:
2227                 return create_arithmetic_binop(expression, new_d_And);
2228         case EXPR_BINARY_BITWISE_OR:
2229                 return create_arithmetic_binop(expression, new_d_Or);
2230         case EXPR_BINARY_BITWISE_XOR:
2231                 return create_arithmetic_binop(expression, new_d_Eor);
2232         case EXPR_BINARY_SHIFTLEFT:
2233         case EXPR_BINARY_SHIFTRIGHT:
2234                 return create_shift(expression);
2235         case EXPR_BINARY_DIV:
2236         case EXPR_BINARY_MOD:
2237                 return create_divmod(expression);
2238         case EXPR_BINARY_LOGICAL_AND:
2239         case EXPR_BINARY_LOGICAL_OR:
2240                 return create_lazy_op(expression);
2241         case EXPR_BINARY_COMMA:
2242                 expression_to_firm(expression->left);
2243                 return expression_to_firm(expression->right);
2244         case EXPR_BINARY_ADD_ASSIGN:
2245                 return create_arithmetic_assign_binop(expression, new_d_Add);
2246         case EXPR_BINARY_SUB_ASSIGN:
2247                 return create_arithmetic_assign_binop(expression, new_d_Sub);
2248         case EXPR_BINARY_MUL_ASSIGN:
2249                 return create_arithmetic_assign_binop(expression, new_d_Mul);
2250         case EXPR_BINARY_MOD_ASSIGN:
2251         case EXPR_BINARY_DIV_ASSIGN:
2252                 return create_arithmetic_assign_divmod(expression);
2253         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2254                 return create_arithmetic_assign_binop(expression, new_d_And);
2255         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2256                 return create_arithmetic_assign_binop(expression, new_d_Or);
2257         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2258                 return create_arithmetic_assign_binop(expression, new_d_Eor);
2259         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2260         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2261                 return create_arithmetic_assign_shift(expression);
2262         case EXPR_BINARY_BUILTIN_EXPECT:
2263                 return expression_to_firm(expression->left);
2264         default:
2265                 panic("TODO binexpr type");
2266         }
2267 }
2268
2269 static ir_node *array_access_addr(const array_access_expression_t *expression)
2270 {
2271         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2272         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2273         ir_node  *offset    = expression_to_firm(expression->index);
2274
2275         /* Matze: it would be better to force mode to mode_uint as this creates more
2276          * opportunities for CSE. Unforunately we still have some optimisations that
2277          * are too conservative in the presence of convs. So we better go with the
2278          * mode of offset and avoid the conv */
2279         ir_mode  *mode = get_irn_mode(offset);
2280         offset         = create_conv(dbgi, offset, mode);
2281
2282         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2283         assert(is_type_pointer(ref_type));
2284         pointer_type_t *pointer_type = &ref_type->pointer;
2285
2286         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2287         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2288         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2289                                              mode);
2290         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2291
2292         return result;
2293 }
2294
2295 static ir_node *array_access_to_firm(
2296                 const array_access_expression_t *expression)
2297 {
2298         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2299         ir_node  *addr   = array_access_addr(expression);
2300         type_t   *type   = revert_automatic_type_conversion(
2301                         (const expression_t*) expression);
2302         type             = skip_typeref(type);
2303
2304         return deref_address(type, addr, dbgi);
2305 }
2306
2307 static long get_offsetof_offset(const offsetof_expression_t *expression)
2308 {
2309         type_t *orig_type = expression->type;
2310         long    offset    = 0;
2311
2312         designator_t *designator = expression->designator;
2313         for( ; designator != NULL; designator = designator->next) {
2314                 type_t *type = skip_typeref(orig_type);
2315                 /* be sure the type is constructed */
2316                 (void) get_ir_type(type);
2317
2318                 if(designator->symbol != NULL) {
2319                         assert(is_type_compound(type));
2320                         symbol_t *symbol = designator->symbol;
2321
2322                         declaration_t *declaration = type->compound.declaration;
2323                         declaration_t *iter        = declaration->scope.declarations;
2324                         for( ; iter != NULL; iter = iter->next) {
2325                                 if(iter->symbol == symbol) {
2326                                         break;
2327                                 }
2328                         }
2329                         assert(iter != NULL);
2330
2331                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2332                         offset += get_entity_offset(iter->v.entity);
2333
2334                         orig_type = iter->type;
2335                 } else {
2336                         expression_t *array_index = designator->array_index;
2337                         assert(designator->array_index != NULL);
2338                         assert(is_type_array(type));
2339                         assert(is_type_valid(array_index->base.type));
2340
2341                         long index         = fold_constant(array_index);
2342                         ir_type *arr_type  = get_ir_type(type);
2343                         ir_type *elem_type = get_array_element_type(arr_type);
2344                         long     elem_size = get_type_size_bytes(elem_type);
2345
2346                         offset += index * elem_size;
2347
2348                         orig_type = type->array.element_type;
2349                 }
2350         }
2351
2352         return offset;
2353 }
2354
2355 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2356 {
2357         ir_mode  *mode   = get_ir_mode(expression->base.type);
2358         long      offset = get_offsetof_offset(expression);
2359         tarval   *tv     = new_tarval_from_long(offset, mode);
2360         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2361
2362         return new_d_Const(dbgi, mode, tv);
2363 }
2364
2365 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2366                                      ir_entity *entity, type_t *type);
2367
2368 static ir_node *compound_literal_to_firm(
2369                 const compound_literal_expression_t *expression)
2370 {
2371         type_t *type = expression->type;
2372
2373         /* create an entity on the stack */
2374         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2375
2376         ident     *const id     = id_unique("CompLit.%u");
2377         ir_type   *const irtype = get_ir_type(type);
2378         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2379         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2380         set_entity_ld_ident(entity, id);
2381
2382         set_entity_variability(entity, variability_uninitialized);
2383
2384         /* create initialisation code */
2385         initializer_t *initializer = expression->initializer;
2386         create_local_initializer(initializer, dbgi, entity, type);
2387
2388         /* create a sel for the compound literal address */
2389         ir_node *frame = get_local_frame(entity);
2390         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2391         return sel;
2392 }
2393
2394 /**
2395  * Transform a sizeof expression into Firm code.
2396  */
2397 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2398 {
2399         type_t *type = expression->type;
2400         if(type == NULL) {
2401                 type = expression->tp_expression->base.type;
2402                 assert(type != NULL);
2403         }
2404
2405         type = skip_typeref(type);
2406         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2407         if(is_type_array(type) && type->array.is_vla
2408                         && expression->tp_expression != NULL) {
2409                 expression_to_firm(expression->tp_expression);
2410         }
2411
2412         return get_type_size(type);
2413 }
2414
2415 /**
2416  * Transform an alignof expression into Firm code.
2417  */
2418 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2419 {
2420         type_t *type = expression->type;
2421         if(type == NULL) {
2422                 /* beware: if expression is a variable reference, return the
2423                    alignment of the variable. */
2424                 const expression_t *tp_expression = expression->tp_expression;
2425                 const declaration_t *declaration = expr_is_variable(tp_expression);
2426                 if (declaration != NULL) {
2427                         /* TODO: get the alignment of this variable. */
2428                 }
2429                 type = tp_expression->base.type;
2430                 assert(type != NULL);
2431         }
2432
2433         ir_mode *const mode = get_ir_mode(expression->base.type);
2434         symconst_symbol sym;
2435         sym.type_p = get_ir_type(type);
2436         return new_SymConst(mode, sym, symconst_type_align);
2437 }
2438
2439 static void init_ir_types(void);
2440 long fold_constant(const expression_t *expression)
2441 {
2442         init_ir_types();
2443
2444         assert(is_constant_expression(expression));
2445
2446         ir_graph *old_current_ir_graph = current_ir_graph;
2447         if(current_ir_graph == NULL) {
2448                 current_ir_graph = get_const_code_irg();
2449         }
2450
2451         ir_node *cnst = expression_to_firm(expression);
2452         current_ir_graph = old_current_ir_graph;
2453
2454         if(!is_Const(cnst)) {
2455                 panic("couldn't fold constant\n");
2456         }
2457
2458         tarval *tv = get_Const_tarval(cnst);
2459         if(!tarval_is_long(tv)) {
2460                 panic("result of constant folding is not integer\n");
2461         }
2462
2463         return get_tarval_long(tv);
2464 }
2465
2466 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2467 {
2468         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2469
2470         /* first try to fold a constant condition */
2471         if(is_constant_expression(expression->condition)) {
2472                 long val = fold_constant(expression->condition);
2473                 if(val) {
2474                         return expression_to_firm(expression->true_expression);
2475                 } else {
2476                         return expression_to_firm(expression->false_expression);
2477                 }
2478         }
2479
2480         ir_node *cur_block   = get_cur_block();
2481
2482         /* create the true block */
2483         ir_node *true_block  = new_immBlock();
2484
2485         ir_node *true_val = expression_to_firm(expression->true_expression);
2486         ir_node *true_jmp = new_Jmp();
2487
2488         /* create the false block */
2489         ir_node *false_block = new_immBlock();
2490
2491         ir_node *false_val = expression_to_firm(expression->false_expression);
2492         ir_node *false_jmp = new_Jmp();
2493
2494         /* create the condition evaluation */
2495         set_cur_block(cur_block);
2496         create_condition_evaluation(expression->condition, true_block, false_block);
2497         mature_immBlock(true_block);
2498         mature_immBlock(false_block);
2499
2500         /* create the common block */
2501         ir_node *common_block = new_immBlock();
2502         add_immBlock_pred(common_block, true_jmp);
2503         add_immBlock_pred(common_block, false_jmp);
2504         mature_immBlock(common_block);
2505
2506         /* TODO improve static semantics, so either both or no values are NULL */
2507         if (true_val == NULL || false_val == NULL)
2508                 return NULL;
2509
2510         ir_node *in[2] = { true_val, false_val };
2511         ir_mode *mode  = get_irn_mode(true_val);
2512         assert(get_irn_mode(false_val) == mode);
2513         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2514
2515         return val;
2516 }
2517
2518 static ir_node *select_addr(const select_expression_t *expression)
2519 {
2520         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2521
2522         ir_node *compound_addr = expression_to_firm(expression->compound);
2523
2524         /* make sure the type is constructed */
2525         type_t *type = skip_typeref(expression->compound->base.type);
2526         if (is_type_pointer(type)) {
2527                 type = type->pointer.points_to;
2528         }
2529         (void) get_ir_type(type);
2530
2531         declaration_t *entry = expression->compound_entry;
2532         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2533         ir_entity     *entity = entry->v.entity;
2534
2535         assert(entity != NULL);
2536
2537         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2538
2539         return sel;
2540 }
2541
2542 static ir_node *select_to_firm(const select_expression_t *expression)
2543 {
2544         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2545         ir_node  *addr   = select_addr(expression);
2546         type_t   *type   = revert_automatic_type_conversion(
2547                         (const expression_t*) expression);
2548         type             = skip_typeref(type);
2549
2550         return deref_address(type, addr, dbgi);
2551 }
2552
2553 /* Values returned by __builtin_classify_type. */
2554 typedef enum gcc_type_class
2555 {
2556         no_type_class = -1,
2557         void_type_class,
2558         integer_type_class,
2559         char_type_class,
2560         enumeral_type_class,
2561         boolean_type_class,
2562         pointer_type_class,
2563         reference_type_class,
2564         offset_type_class,
2565         real_type_class,
2566         complex_type_class,
2567         function_type_class,
2568         method_type_class,
2569         record_type_class,
2570         union_type_class,
2571         array_type_class,
2572         string_type_class,
2573         set_type_class,
2574         file_type_class,
2575         lang_type_class
2576 } gcc_type_class;
2577
2578 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2579 {
2580         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2581
2582         gcc_type_class tc;
2583         switch (type->kind)
2584         {
2585                 case TYPE_ATOMIC: {
2586                         const atomic_type_t *const atomic_type = &type->atomic;
2587                         switch (atomic_type->akind) {
2588                                 /* should not be reached */
2589                                 case ATOMIC_TYPE_INVALID:
2590                                         tc = no_type_class;
2591                                         goto make_const;
2592
2593                                 /* gcc cannot do that */
2594                                 case ATOMIC_TYPE_VOID:
2595                                         tc = void_type_class;
2596                                         goto make_const;
2597
2598                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2599                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2600                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2601                                 case ATOMIC_TYPE_SHORT:
2602                                 case ATOMIC_TYPE_USHORT:
2603                                 case ATOMIC_TYPE_INT:
2604                                 case ATOMIC_TYPE_UINT:
2605                                 case ATOMIC_TYPE_LONG:
2606                                 case ATOMIC_TYPE_ULONG:
2607                                 case ATOMIC_TYPE_LONGLONG:
2608                                 case ATOMIC_TYPE_ULONGLONG:
2609                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2610                                         tc = integer_type_class;
2611                                         goto make_const;
2612
2613                                 case ATOMIC_TYPE_FLOAT:
2614                                 case ATOMIC_TYPE_DOUBLE:
2615                                 case ATOMIC_TYPE_LONG_DOUBLE:
2616                                         tc = real_type_class;
2617                                         goto make_const;
2618                         }
2619                         panic("Unexpected atomic type in classify_type_to_firm().");
2620                 }
2621
2622                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2623                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2624                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2625                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2626                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2627                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2628                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2629                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2630
2631                 /* gcc handles this as integer */
2632                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2633
2634                 case TYPE_BUILTIN:
2635                 /* typedef/typeof should be skipped already */
2636                 case TYPE_TYPEDEF:
2637                 case TYPE_TYPEOF:
2638                 case TYPE_INVALID:
2639                 case TYPE_ERROR:
2640                         break;
2641         }
2642         panic("unexpected TYPE classify_type_to_firm().");
2643
2644 make_const: ;
2645         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2646         ir_mode  *const mode = mode_int;
2647         tarval   *const tv   = new_tarval_from_long(tc, mode);
2648         return new_d_Const(dbgi, mode, tv);
2649 }
2650
2651 static ir_node *function_name_to_firm(
2652                 const funcname_expression_t *const expr)
2653 {
2654         switch(expr->kind) {
2655         case FUNCNAME_FUNCTION:
2656         case FUNCNAME_PRETTY_FUNCTION:
2657         case FUNCNAME_FUNCDNAME:
2658                 if (current_function_name == NULL) {
2659                         const source_position_t *const src_pos = &expr->base.source_position;
2660                         const char *const name = current_function_decl->symbol->string;
2661                         const string_t string = { name, strlen(name) + 1 };
2662                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2663                 }
2664                 return current_function_name;
2665         case FUNCNAME_FUNCSIG:
2666                 if (current_funcsig == NULL) {
2667                         const source_position_t *const src_pos = &expr->base.source_position;
2668                         ir_entity *ent = get_irg_entity(current_ir_graph);
2669                         const char *const name = get_entity_ld_name(ent);
2670                         const string_t string = { name, strlen(name) + 1 };
2671                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2672                 }
2673                 return current_funcsig;
2674         }
2675         panic("Unsupported function name");
2676 }
2677
2678 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2679 {
2680         statement_t *statement = expr->statement;
2681
2682         assert(statement->kind == STATEMENT_COMPOUND);
2683         return compound_statement_to_firm(&statement->compound);
2684 }
2685
2686 static ir_node *va_start_expression_to_firm(
2687         const va_start_expression_t *const expr)
2688 {
2689         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2690         int        const n           = get_method_n_params(method_type) - 1;
2691         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2692         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2693         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2694         ir_node   *const no_mem      = new_NoMem();
2695         ir_node   *const arg_sel     =
2696                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2697
2698         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2699         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2700         set_value_for_expression(expr->ap, add);
2701
2702         return NULL;
2703 }
2704
2705 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2706 {
2707         type_t   *const type   = expr->base.type;
2708         ir_node  *const ap     = expression_to_firm(expr->ap);
2709         dbg_info *const dbgi   = get_dbg_info(&expr->base.source_position);
2710         ir_node  *const res    = deref_address(type, ap, dbgi);
2711
2712         ir_node  *const cnst   = get_type_size(expr->base.type);
2713         ir_node  *const add    = new_d_Add(dbgi, ap, cnst, mode_P_data);
2714         set_value_for_expression(expr->ap, add);
2715
2716         return res;
2717 }
2718
2719 static ir_node *dereference_addr(const unary_expression_t *const expression)
2720 {
2721         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2722         return expression_to_firm(expression->value);
2723 }
2724
2725 static ir_node *expression_to_addr(const expression_t *expression)
2726 {
2727         switch(expression->kind) {
2728         case EXPR_REFERENCE:
2729                 return reference_addr(&expression->reference);
2730         case EXPR_ARRAY_ACCESS:
2731                 return array_access_addr(&expression->array_access);
2732         case EXPR_SELECT:
2733                 return select_addr(&expression->select);
2734         case EXPR_CALL:
2735                 return call_expression_to_firm(&expression->call);
2736         case EXPR_UNARY_DEREFERENCE: {
2737                 return dereference_addr(&expression->unary);
2738         }
2739         default:
2740                 break;
2741         }
2742         panic("trying to get address of non-lvalue");
2743 }
2744
2745 static ir_node *builtin_constant_to_firm(
2746                 const builtin_constant_expression_t *expression)
2747 {
2748         ir_mode *mode = get_ir_mode(expression->base.type);
2749         long     v;
2750
2751         if (is_constant_expression(expression->value)) {
2752                 v = 1;
2753         } else {
2754                 v = 0;
2755         }
2756         return new_Const_long(mode, v);
2757 }
2758
2759 static ir_node *builtin_prefetch_to_firm(
2760                 const builtin_prefetch_expression_t *expression)
2761 {
2762         ir_node *adr = expression_to_firm(expression->adr);
2763         /* no Firm support for prefetch yet */
2764         (void) adr;
2765         return NULL;
2766 }
2767
2768 static ir_node *_expression_to_firm(const expression_t *expression)
2769 {
2770         switch(expression->kind) {
2771         case EXPR_CHARACTER_CONSTANT:
2772                 return character_constant_to_firm(&expression->conste);
2773         case EXPR_WIDE_CHARACTER_CONSTANT:
2774                 return wide_character_constant_to_firm(&expression->conste);
2775         case EXPR_CONST:
2776                 return const_to_firm(&expression->conste);
2777         case EXPR_STRING_LITERAL:
2778                 return string_literal_to_firm(&expression->string);
2779         case EXPR_WIDE_STRING_LITERAL:
2780                 return wide_string_literal_to_firm(&expression->wide_string);
2781         case EXPR_REFERENCE:
2782                 return reference_expression_to_firm(&expression->reference);
2783         case EXPR_CALL:
2784                 return call_expression_to_firm(&expression->call);
2785         EXPR_UNARY_CASES
2786                 return unary_expression_to_firm(&expression->unary);
2787         EXPR_BINARY_CASES
2788                 return binary_expression_to_firm(&expression->binary);
2789         case EXPR_ARRAY_ACCESS:
2790                 return array_access_to_firm(&expression->array_access);
2791         case EXPR_SIZEOF:
2792                 return sizeof_to_firm(&expression->typeprop);
2793         case EXPR_ALIGNOF:
2794                 return alignof_to_firm(&expression->typeprop);
2795         case EXPR_CONDITIONAL:
2796                 return conditional_to_firm(&expression->conditional);
2797         case EXPR_SELECT:
2798                 return select_to_firm(&expression->select);
2799         case EXPR_CLASSIFY_TYPE:
2800                 return classify_type_to_firm(&expression->classify_type);
2801         case EXPR_FUNCNAME:
2802                 return function_name_to_firm(&expression->funcname);
2803         case EXPR_STATEMENT:
2804                 return statement_expression_to_firm(&expression->statement);
2805         case EXPR_VA_START:
2806                 return va_start_expression_to_firm(&expression->va_starte);
2807         case EXPR_VA_ARG:
2808                 return va_arg_expression_to_firm(&expression->va_arge);
2809         case EXPR_BUILTIN_SYMBOL:
2810                 panic("unimplemented expression found");
2811         case EXPR_BUILTIN_CONSTANT_P:
2812                 return builtin_constant_to_firm(&expression->builtin_constant);
2813         case EXPR_BUILTIN_PREFETCH:
2814                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2815         case EXPR_OFFSETOF:
2816                 return offsetof_to_firm(&expression->offsetofe);
2817         case EXPR_COMPOUND_LITERAL:
2818                 return compound_literal_to_firm(&expression->compound_literal);
2819
2820         case EXPR_UNKNOWN:
2821         case EXPR_INVALID:
2822                 break;
2823         }
2824         panic("invalid expression found");
2825 }
2826
2827 static ir_node *expression_to_firm(const expression_t *expression)
2828 {
2829         ir_node *res = _expression_to_firm(expression);
2830
2831         if(res != NULL && get_irn_mode(res) == mode_b) {
2832                 ir_mode *mode = get_ir_mode(expression->base.type);
2833                 if(is_Const(res)) {
2834                         if(is_Const_null(res)) {
2835                                 return new_Const_long(mode, 0);
2836                         } else {
2837                                 assert(is_Const_one(res));
2838                                 return new_Const_long(mode, 1);
2839                         }
2840                 }
2841
2842                 dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2843                 return produce_condition_result(expression, dbgi);
2844         }
2845
2846         return res;
2847 }
2848
2849 static ir_node *expression_to_modeb(const expression_t *expression)
2850 {
2851         ir_node *res = _expression_to_firm(expression);
2852         res          = create_conv(NULL, res, mode_b);
2853
2854         return res;
2855 }
2856
2857 /**
2858  * create a short-circuit expression evaluation that tries to construct
2859  * efficient control flow structures for &&, || and ! expressions
2860  */
2861 static void create_condition_evaluation(const expression_t *expression,
2862                                         ir_node *true_block,
2863                                         ir_node *false_block)
2864 {
2865         switch(expression->kind) {
2866         case EXPR_UNARY_NOT: {
2867                 const unary_expression_t *unary_expression = &expression->unary;
2868                 create_condition_evaluation(unary_expression->value, false_block,
2869                                             true_block);
2870                 return;
2871         }
2872         case EXPR_BINARY_LOGICAL_AND: {
2873                 const binary_expression_t *binary_expression = &expression->binary;
2874
2875                 ir_node *cur_block   = get_cur_block();
2876                 ir_node *extra_block = new_immBlock();
2877                 set_cur_block(cur_block);
2878                 create_condition_evaluation(binary_expression->left, extra_block,
2879                                             false_block);
2880                 mature_immBlock(extra_block);
2881                 set_cur_block(extra_block);
2882                 create_condition_evaluation(binary_expression->right, true_block,
2883                                             false_block);
2884                 return;
2885         }
2886         case EXPR_BINARY_LOGICAL_OR: {
2887                 const binary_expression_t *binary_expression = &expression->binary;
2888
2889                 ir_node *cur_block   = get_cur_block();
2890                 ir_node *extra_block = new_immBlock();
2891                 set_cur_block(cur_block);
2892                 create_condition_evaluation(binary_expression->left, true_block,
2893                                             extra_block);
2894                 mature_immBlock(extra_block);
2895                 set_cur_block(extra_block);
2896                 create_condition_evaluation(binary_expression->right, true_block,
2897                                             false_block);
2898                 return;
2899         }
2900         default:
2901                 break;
2902         }
2903
2904         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
2905         ir_node  *condition  = expression_to_modeb(expression);
2906         ir_node  *cond       = new_d_Cond(dbgi, condition);
2907         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2908         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2909
2910         /* set branch prediction info based on __builtin_expect */
2911         if(expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
2912                 long               cnst = fold_constant(expression->binary.right);
2913                 cond_jmp_predicate pred;
2914
2915                 if(cnst == 0) {
2916                         pred = COND_JMP_PRED_FALSE;
2917                 } else {
2918                         pred = COND_JMP_PRED_TRUE;
2919                 }
2920                 set_Cond_jmp_pred(cond, pred);
2921         }
2922
2923         add_immBlock_pred(true_block, true_proj);
2924         add_immBlock_pred(false_block, false_proj);
2925
2926         set_cur_block(NULL);
2927 }
2928
2929
2930
2931 static void create_declaration_entity(declaration_t *declaration,
2932                                       declaration_kind_t declaration_kind,
2933                                       ir_type *parent_type)
2934 {
2935         ident     *const id     = new_id_from_str(declaration->symbol->string);
2936         type_t    *const type   = skip_typeref(declaration->type);
2937         ir_type   *const irtype = get_ir_type(type);
2938         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
2939         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
2940
2941         declaration->declaration_kind = (unsigned char) declaration_kind;
2942         declaration->v.entity         = entity;
2943         set_entity_variability(entity, variability_uninitialized);
2944         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
2945         if(parent_type == get_tls_type())
2946                 set_entity_allocation(entity, allocation_automatic);
2947         else if(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
2948                 set_entity_allocation(entity, allocation_static);
2949
2950         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
2951                 set_entity_volatility(entity, volatility_is_volatile);
2952         }
2953 }
2954
2955
2956 typedef struct type_path_entry_t type_path_entry_t;
2957 struct type_path_entry_t {
2958         type_t           *type;
2959         ir_initializer_t *initializer;
2960         size_t            index;
2961         declaration_t    *compound_entry;
2962 };
2963
2964 typedef struct type_path_t type_path_t;
2965 struct type_path_t {
2966         type_path_entry_t *path;
2967         type_t            *top_type;
2968         bool               invalid;
2969 };
2970
2971 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
2972 {
2973         size_t len = ARR_LEN(path->path);
2974
2975         for(size_t i = 0; i < len; ++i) {
2976                 const type_path_entry_t *entry = & path->path[i];
2977
2978                 type_t *type = skip_typeref(entry->type);
2979                 if(is_type_compound(type)) {
2980                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
2981                 } else if(is_type_array(type)) {
2982                         fprintf(stderr, "[%zd]", entry->index);
2983                 } else {
2984                         fprintf(stderr, "-INVALID-");
2985                 }
2986         }
2987         fprintf(stderr, "  (");
2988         print_type(path->top_type);
2989         fprintf(stderr, ")");
2990 }
2991
2992 static type_path_entry_t *get_type_path_top(const type_path_t *path)
2993 {
2994         size_t len = ARR_LEN(path->path);
2995         assert(len > 0);
2996         return & path->path[len-1];
2997 }
2998
2999 static type_path_entry_t *append_to_type_path(type_path_t *path)
3000 {
3001         size_t len = ARR_LEN(path->path);
3002         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3003
3004         type_path_entry_t *result = & path->path[len];
3005         memset(result, 0, sizeof(result[0]));
3006         return result;
3007 }
3008
3009 static size_t get_compound_size(const compound_type_t *type)
3010 {
3011         declaration_t *declaration = type->declaration;
3012         declaration_t *member      = declaration->scope.declarations;
3013         size_t         size        = 0;
3014         for( ; member != NULL; member = member->next) {
3015                 ++size;
3016         }
3017         /* TODO: cache results? */
3018
3019         return size;
3020 }
3021
3022 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3023 {
3024         type_t *orig_top_type = path->top_type;
3025         type_t *top_type      = skip_typeref(orig_top_type);
3026
3027         assert(is_type_compound(top_type) || is_type_array(top_type));
3028
3029         if(ARR_LEN(path->path) == 0) {
3030                 return NULL;
3031         } else {
3032                 type_path_entry_t *top         = get_type_path_top(path);
3033                 ir_initializer_t  *initializer = top->initializer;
3034                 return get_initializer_compound_value(initializer, top->index);
3035         }
3036 }
3037
3038 static void descend_into_subtype(type_path_t *path)
3039 {
3040         type_t *orig_top_type = path->top_type;
3041         type_t *top_type      = skip_typeref(orig_top_type);
3042
3043         assert(is_type_compound(top_type) || is_type_array(top_type));
3044
3045         ir_initializer_t *initializer = get_initializer_entry(path);
3046
3047         type_path_entry_t *top = append_to_type_path(path);
3048         top->type              = top_type;
3049
3050         size_t len;
3051
3052         if(is_type_compound(top_type)) {
3053                 declaration_t *declaration = top_type->compound.declaration;
3054                 declaration_t *entry       = declaration->scope.declarations;
3055
3056                 top->compound_entry = entry;
3057                 top->index          = 0;
3058                 len                 = get_compound_size(&top_type->compound);
3059                 if(entry != NULL)
3060                         path->top_type = entry->type;
3061         } else {
3062                 assert(is_type_array(top_type));
3063                 assert(top_type->array.size > 0);
3064
3065                 top->index     = 0;
3066                 path->top_type = top_type->array.element_type;
3067                 len            = top_type->array.size;
3068         }
3069         if(initializer == NULL
3070                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3071                 initializer = create_initializer_compound(len);
3072                 /* we have to set the entry at the 2nd latest path entry... */
3073                 size_t path_len = ARR_LEN(path->path);
3074                 assert(path_len >= 1);
3075                 if(path_len > 1) {
3076                         type_path_entry_t *entry        = & path->path[path_len-2];
3077                         ir_initializer_t  *tinitializer = entry->initializer;
3078                         set_initializer_compound_value(tinitializer, entry->index,
3079                                                        initializer);
3080                 }
3081         }
3082         top->initializer = initializer;
3083 }
3084
3085 static void ascend_from_subtype(type_path_t *path)
3086 {
3087         type_path_entry_t *top = get_type_path_top(path);
3088
3089         path->top_type = top->type;
3090
3091         size_t len = ARR_LEN(path->path);
3092         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3093 }
3094
3095 static void walk_designator(type_path_t *path, const designator_t *designator)
3096 {
3097         /* designators start at current object type */
3098         ARR_RESIZE(type_path_entry_t, path->path, 1);
3099
3100         for( ; designator != NULL; designator = designator->next) {
3101                 type_path_entry_t *top         = get_type_path_top(path);
3102                 type_t            *orig_type   = top->type;
3103                 type_t            *type        = skip_typeref(orig_type);
3104
3105                 if(designator->symbol != NULL) {
3106                         assert(is_type_compound(type));
3107                         size_t    index  = 0;
3108                         symbol_t *symbol = designator->symbol;
3109
3110                         declaration_t *declaration = type->compound.declaration;
3111                         declaration_t *iter        = declaration->scope.declarations;
3112                         for( ; iter != NULL; iter = iter->next, ++index) {
3113                                 if(iter->symbol == symbol) {
3114                                         break;
3115                                 }
3116                         }
3117                         assert(iter != NULL);
3118
3119                         top->type           = orig_type;
3120                         top->compound_entry = iter;
3121                         top->index          = index;
3122                         orig_type           = iter->type;
3123                 } else {
3124                         expression_t *array_index = designator->array_index;
3125                         assert(designator->array_index != NULL);
3126                         assert(is_type_array(type));
3127                         assert(is_type_valid(array_index->base.type));
3128
3129                         long index = fold_constant(array_index);
3130                         assert(index >= 0);
3131 #ifndef NDEBUG
3132                         if(type->array.size_constant == 1) {
3133                                 long array_size = type->array.size;
3134                                 assert(index < array_size);
3135                         }
3136 #endif
3137
3138                         top->type  = orig_type;
3139                         top->index = (size_t) index;
3140                         orig_type  = type->array.element_type;
3141                 }
3142                 path->top_type = orig_type;
3143
3144                 if(designator->next != NULL) {
3145                         descend_into_subtype(path);
3146                 }
3147         }
3148
3149         path->invalid  = false;
3150 }
3151
3152 static void advance_current_object(type_path_t *path)
3153 {
3154         if(path->invalid) {
3155                 /* TODO: handle this... */
3156                 panic("invalid initializer in ast2firm (excessive elements)");
3157                 return;
3158         }
3159
3160         type_path_entry_t *top = get_type_path_top(path);
3161
3162         type_t *type = skip_typeref(top->type);
3163         if(is_type_union(type)) {
3164                 top->compound_entry = NULL;
3165         } else if(is_type_struct(type)) {
3166                 declaration_t *entry = top->compound_entry;
3167
3168                 top->index++;
3169                 entry               = entry->next;
3170                 top->compound_entry = entry;
3171                 if(entry != NULL) {
3172                         path->top_type = entry->type;
3173                         return;
3174                 }
3175         } else {
3176                 assert(is_type_array(type));
3177
3178                 top->index++;
3179                 if(!type->array.size_constant || top->index < type->array.size) {
3180                         return;
3181                 }
3182         }
3183
3184         /* we're past the last member of the current sub-aggregate, try if we
3185          * can ascend in the type hierarchy and continue with another subobject */
3186         size_t len = ARR_LEN(path->path);
3187
3188         if(len > 1) {
3189                 ascend_from_subtype(path);
3190                 advance_current_object(path);
3191         } else {
3192                 path->invalid = true;
3193         }
3194 }
3195
3196
3197 static ir_initializer_t *create_ir_initializer(
3198                 const initializer_t *initializer, type_t *type);
3199
3200 static ir_initializer_t *create_ir_initializer_value(
3201                 const initializer_value_t *initializer)
3202 {
3203         if (is_type_compound(initializer->value->base.type)) {
3204                 panic("initializer creation for compounds not implemented yet");
3205         }
3206         ir_node *value = expression_to_firm(initializer->value);
3207         return create_initializer_const(value);
3208 }
3209
3210 static ir_initializer_t *create_ir_initializer_list(
3211                 const initializer_list_t *initializer, type_t *type)
3212 {
3213         type_path_t path;
3214         memset(&path, 0, sizeof(path));
3215         path.top_type = type;
3216         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3217
3218         descend_into_subtype(&path);
3219
3220         for(size_t i = 0; i < initializer->len; ++i) {
3221                 const initializer_t *sub_initializer = initializer->initializers[i];
3222
3223                 if(sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3224                         walk_designator(&path, sub_initializer->designator.designator);
3225                         continue;
3226                 }
3227
3228                 if(sub_initializer->kind == INITIALIZER_VALUE) {
3229                         /* we might have to descend into types until we're at a scalar
3230                          * type */
3231                         while(true) {
3232                                 type_t *orig_top_type = path.top_type;
3233                                 type_t *top_type      = skip_typeref(orig_top_type);
3234
3235                                 if(is_type_scalar(top_type))
3236                                         break;
3237                                 descend_into_subtype(&path);
3238                         }
3239                 }
3240
3241                 ir_initializer_t *sub_irinitializer
3242                         = create_ir_initializer(sub_initializer, path.top_type);
3243
3244                 size_t path_len = ARR_LEN(path.path);
3245                 assert(path_len >= 1);
3246                 type_path_entry_t *entry        = & path.path[path_len-1];
3247                 ir_initializer_t  *tinitializer = entry->initializer;
3248                 set_initializer_compound_value(tinitializer, entry->index,
3249                                                sub_irinitializer);
3250
3251                 advance_current_object(&path);
3252         }
3253
3254         assert(ARR_LEN(path.path) >= 1);
3255         ir_initializer_t *result = path.path[0].initializer;
3256         DEL_ARR_F(path.path);
3257
3258         return result;
3259 }
3260
3261 static ir_initializer_t *create_ir_initializer_string(
3262                 const initializer_string_t *initializer, type_t *type)
3263 {
3264         type = skip_typeref(type);
3265
3266         size_t            string_len    = initializer->string.size;
3267         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3268         size_t            len           = type->array.size;
3269         ir_initializer_t *irinitializer = create_initializer_compound(len);
3270
3271         const char *string = initializer->string.begin;
3272         ir_mode    *mode   = get_type_mode(ir_type_const_char);
3273
3274         for(size_t i = 0; i < len; ++i) {
3275                 char c = 0;
3276                 if(i < string_len)
3277                         c = string[i];
3278
3279                 tarval           *tv = new_tarval_from_long(c, mode);
3280                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3281
3282                 set_initializer_compound_value(irinitializer, i, char_initializer);
3283         }
3284
3285         return irinitializer;
3286 }
3287
3288 static ir_initializer_t *create_ir_initializer_wide_string(
3289                 const initializer_wide_string_t *initializer, type_t *type)
3290 {
3291         size_t            string_len    = initializer->string.size;
3292         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3293         size_t            len           = type->array.size;
3294         ir_initializer_t *irinitializer = create_initializer_compound(len);
3295
3296         const wchar_rep_t *string = initializer->string.begin;
3297         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3298
3299         for(size_t i = 0; i < len; ++i) {
3300                 wchar_rep_t c = 0;
3301                 if(i < string_len) {
3302                         c = string[i];
3303                 }
3304                 tarval *tv = new_tarval_from_long(c, mode);
3305                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3306
3307                 set_initializer_compound_value(irinitializer, i, char_initializer);
3308         }
3309
3310         return irinitializer;
3311 }
3312
3313 static ir_initializer_t *create_ir_initializer(
3314                 const initializer_t *initializer, type_t *type)
3315 {
3316         switch(initializer->kind) {
3317                 case INITIALIZER_STRING:
3318                         return create_ir_initializer_string(&initializer->string, type);
3319
3320                 case INITIALIZER_WIDE_STRING:
3321                         return create_ir_initializer_wide_string(&initializer->wide_string,
3322                                                                  type);
3323
3324                 case INITIALIZER_LIST:
3325                         return create_ir_initializer_list(&initializer->list, type);
3326
3327                 case INITIALIZER_VALUE:
3328                         return create_ir_initializer_value(&initializer->value);
3329
3330                 case INITIALIZER_DESIGNATOR:
3331                         panic("unexpected designator initializer found");
3332         }
3333         panic("unknown initializer");
3334 }
3335
3336 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3337                 ir_node *base_addr)
3338 {
3339         if (is_atomic_type(type)) {
3340                 ir_mode *mode = get_type_mode(type);
3341                 tarval  *zero = get_mode_null(mode);
3342                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3343
3344                 /* TODO: bitfields */
3345                 ir_node *mem    = get_store();
3346                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3347                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3348                 set_store(proj_m);
3349         } else {
3350                 assert(is_compound_type(type));
3351
3352                 int n_members;
3353                 if(is_Array_type(type)) {
3354                         assert(has_array_upper_bound(type, 0));
3355                         n_members = get_array_upper_bound_int(type, 0);
3356                 } else {
3357                         n_members = get_compound_n_members(type);
3358                 }
3359
3360                 for(int i = 0; i < n_members; ++i) {
3361                         ir_node *addr;
3362                         ir_type *irtype;
3363                         if(is_Array_type(type)) {
3364                                 ir_entity *entity   = get_array_element_entity(type);
3365                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3366                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3367                                 ir_node   *in[1]    = { cnst };
3368                                 irtype = get_array_element_type(type);
3369                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3370                         } else {
3371                                 ir_entity *member = get_compound_member(type, i);
3372
3373                                 irtype = get_entity_type(member);
3374                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3375                         }
3376
3377                         create_dynamic_null_initializer(irtype, dbgi, addr);
3378                 }
3379         }
3380 }
3381
3382 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3383                 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3384 {
3385         switch(get_initializer_kind(initializer)) {
3386         case IR_INITIALIZER_NULL: {
3387                 create_dynamic_null_initializer(type, dbgi, base_addr);
3388                 return;
3389         }
3390         case IR_INITIALIZER_CONST: {
3391                 ir_node *node = get_initializer_const_value(initializer);
3392                 ir_mode *mode = get_irn_mode(node);
3393                 assert(get_type_mode(type) == mode);
3394
3395                 /* TODO: bitfields... */
3396                 ir_node *mem    = get_store();
3397                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3398                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3399                 set_store(proj_m);
3400                 return;
3401         }
3402         case IR_INITIALIZER_TARVAL: {
3403                 tarval  *tv   = get_initializer_tarval_value(initializer);
3404                 ir_mode *mode = get_tarval_mode(tv);
3405                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3406                 assert(get_type_mode(type) == mode);
3407
3408                 /* TODO: bitfields... */
3409                 ir_node *mem    = get_store();
3410                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3411                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3412                 set_store(proj_m);
3413                 return;
3414         }
3415         case IR_INITIALIZER_COMPOUND: {
3416                 assert(is_compound_type(type));
3417                 int n_members;
3418                 if(is_Array_type(type)) {
3419                         assert(has_array_upper_bound(type, 0));
3420                         n_members = get_array_upper_bound_int(type, 0);
3421                 } else {
3422                         n_members = get_compound_n_members(type);
3423                 }
3424
3425                 if(get_initializer_compound_n_entries(initializer)
3426                                 != (unsigned) n_members)
3427                         panic("initializer doesn't match compound type");
3428
3429                 for(int i = 0; i < n_members; ++i) {
3430                         ir_node *addr;
3431                         ir_type *irtype;
3432                         if(is_Array_type(type)) {
3433                                 ir_entity *entity   = get_array_element_entity(type);
3434                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3435                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3436                                 ir_node   *in[1]    = { cnst };
3437                                 irtype = get_array_element_type(type);
3438                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3439                         } else {
3440                                 ir_entity *member = get_compound_member(type, i);
3441
3442                                 irtype = get_entity_type(member);
3443                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3444                         }
3445
3446                         ir_initializer_t *sub_init
3447                                 = get_initializer_compound_value(initializer, i);
3448
3449                         create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3450                 }
3451                 return;
3452         }
3453         }
3454
3455         panic("invalid IR_INITIALIZER found");
3456 }
3457
3458 static void create_dynamic_initializer(ir_initializer_t *initializer,
3459                 dbg_info *dbgi, ir_entity *entity)
3460 {
3461         ir_node *frame     = get_local_frame(entity);
3462         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3463         ir_type *type      = get_entity_type(entity);
3464
3465         create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3466 }
3467
3468 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3469                                      ir_entity *entity, type_t *type)
3470 {
3471         ir_node *memory = get_store();
3472         ir_node *nomem  = new_NoMem();
3473         ir_node *frame  = get_irg_frame(current_ir_graph);
3474         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3475
3476         if(initializer->kind == INITIALIZER_VALUE) {
3477                 initializer_value_t *initializer_value = &initializer->value;
3478
3479                 ir_node *value = expression_to_firm(initializer_value->value);
3480                 type = skip_typeref(type);
3481                 assign_value(dbgi, addr, type, value);
3482                 return;
3483         }
3484
3485         if(!is_constant_initializer(initializer)) {
3486                 ir_initializer_t *irinitializer
3487                         = create_ir_initializer(initializer, type);
3488
3489                 create_dynamic_initializer(irinitializer, dbgi, entity);
3490                 return;
3491         }
3492
3493         /* create the ir_initializer */
3494         ir_graph *const old_current_ir_graph = current_ir_graph;
3495         current_ir_graph = get_const_code_irg();
3496
3497         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3498
3499         assert(current_ir_graph == get_const_code_irg());
3500         current_ir_graph = old_current_ir_graph;
3501
3502         /* create a "template" entity which is copied to the entity on the stack */
3503         ident     *const id          = id_unique("initializer.%u");
3504         ir_type   *const irtype      = get_ir_type(type);
3505         ir_type   *const global_type = get_glob_type();
3506         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3507         set_entity_ld_ident(init_entity, id);
3508
3509         set_entity_variability(init_entity, variability_initialized);
3510         set_entity_visibility(init_entity, visibility_local);
3511         set_entity_allocation(init_entity, allocation_static);
3512
3513         set_entity_initializer(init_entity, irinitializer);
3514
3515         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3516         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3517
3518         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3519         set_store(copyb_mem);
3520 }
3521
3522 static void create_initializer_local_variable_entity(declaration_t *declaration)
3523 {
3524         initializer_t *initializer = declaration->init.initializer;
3525         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3526         ir_entity     *entity      = declaration->v.entity;
3527         type_t        *type        = declaration->type;
3528         create_local_initializer(initializer, dbgi, entity, type);
3529 }
3530
3531 static void create_declaration_initializer(declaration_t *declaration)
3532 {
3533         initializer_t *initializer = declaration->init.initializer;
3534         if(initializer == NULL)
3535                 return;
3536
3537         declaration_kind_t declaration_kind
3538                 = (declaration_kind_t) declaration->declaration_kind;
3539         if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3540                 create_initializer_local_variable_entity(declaration);
3541                 return;
3542         }
3543
3544         if(initializer->kind == INITIALIZER_VALUE) {
3545                 initializer_value_t *initializer_value = &initializer->value;
3546                 dbg_info            *dbgi
3547                         = get_dbg_info(&declaration->source_position);
3548
3549                 ir_node *value = expression_to_firm(initializer_value->value);
3550                 value = do_strict_conv(dbgi, value);
3551
3552                 if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3553                         set_value(declaration->v.value_number, value);
3554                 } else {
3555                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3556
3557                         ir_entity *entity = declaration->v.entity;
3558
3559                         set_entity_variability(entity, variability_initialized);
3560                         set_atomic_ent_value(entity, value);
3561                 }
3562         } else {
3563                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3564                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3565
3566                 ir_entity        *entity        = declaration->v.entity;
3567                 ir_initializer_t *irinitializer
3568                         = create_ir_initializer(initializer, declaration->type);
3569
3570                 set_entity_variability(entity, variability_initialized);
3571                 set_entity_initializer(entity, irinitializer);
3572         }
3573 }
3574
3575 static void create_variable_length_array(declaration_t *declaration)
3576 {
3577         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3578         type_t   *type      = declaration->type;
3579         ir_node  *mem       = get_store();
3580         ir_type  *el_type   = get_ir_type(type->array.element_type);
3581
3582         /* make sure size_node is calculated */
3583         get_type_size(type);
3584         ir_node  *elems = type->array.size_node;
3585         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3586
3587         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3588         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3589         set_store(proj_m);
3590
3591         /* initializers are not allowed for VLAs */
3592         assert(declaration->init.initializer == NULL);
3593
3594         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3595         declaration->v.vla_base       = addr;
3596
3597         /* TODO: record VLA somewhere so we create the free node when we leave
3598          * it's scope */
3599 }
3600
3601 /**
3602  * Creates a Firm local variable from a declaration.
3603  */
3604 static void create_local_variable(declaration_t *declaration)
3605 {
3606         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3607
3608         bool needs_entity = declaration->address_taken;
3609         type_t *type = skip_typeref(declaration->type);
3610
3611         /* is it a variable length array? */
3612         if(is_type_array(type) && !type->array.size_constant) {
3613                 create_variable_length_array(declaration);
3614                 return;
3615         } else if(is_type_array(type) || is_type_compound(type)) {
3616                 needs_entity = true;
3617         } else if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3618                 needs_entity = true;
3619         }
3620
3621         if(needs_entity) {
3622                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3623                 create_declaration_entity(declaration,
3624                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3625                                           frame_type);
3626         } else {
3627                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3628                 declaration->v.value_number   = next_value_number_function;
3629                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3630                 ++next_value_number_function;
3631         }
3632
3633         create_declaration_initializer(declaration);
3634 }
3635
3636 static void create_local_static_variable(declaration_t *declaration)
3637 {
3638         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3639
3640         type_t    *const type        = skip_typeref(declaration->type);
3641         ir_type   *const global_type = get_glob_type();
3642         ir_type   *const irtype      = get_ir_type(type);
3643         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3644
3645         size_t l = strlen(declaration->symbol->string);
3646         char   buf[l + sizeof(".%u")];
3647         snprintf(buf, sizeof(buf), "%s.%%u", declaration->symbol->string);
3648         ident     *const id = id_unique(buf);
3649
3650         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3651
3652         if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3653                 set_entity_volatility(entity, volatility_is_volatile);
3654         }
3655
3656         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3657         declaration->v.entity         = entity;
3658         set_entity_ld_ident(entity, create_ld_ident(entity, declaration));
3659         set_entity_variability(entity, variability_uninitialized);
3660         set_entity_visibility(entity, visibility_local);
3661         set_entity_allocation(entity, allocation_static);
3662
3663         ir_graph *const old_current_ir_graph = current_ir_graph;
3664         current_ir_graph = get_const_code_irg();
3665
3666         create_declaration_initializer(declaration);
3667
3668         assert(current_ir_graph == get_const_code_irg());
3669         current_ir_graph = old_current_ir_graph;
3670 }
3671
3672
3673
3674 static void return_statement_to_firm(return_statement_t *statement)
3675 {
3676         if(get_cur_block() == NULL)
3677                 return;
3678
3679         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3680         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3681
3682
3683         ir_node *in[1];
3684         int      in_len;
3685         if(get_method_n_ress(func_irtype) > 0) {
3686                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3687
3688                 if(statement->value != NULL) {
3689                         ir_node *node = expression_to_firm(statement->value);
3690                         node  = do_strict_conv(dbgi, node);
3691                         in[0] = node;
3692                 } else {
3693                         ir_mode *mode;
3694                         if(is_compound_type(res_type)) {
3695                                 mode = mode_P_data;
3696                         } else {
3697                                 mode = get_type_mode(res_type);
3698                         }
3699                         in[0] = new_Unknown(mode);
3700                 }
3701                 in_len = 1;
3702         } else {
3703                 /* build return_value for its side effects */
3704                 if(statement->value != NULL) {
3705                         expression_to_firm(statement->value);
3706                 }
3707                 in_len = 0;
3708         }
3709
3710         ir_node  *store = get_store();
3711         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
3712
3713         ir_node *end_block = get_irg_end_block(current_ir_graph);
3714         add_immBlock_pred(end_block, ret);
3715
3716         set_cur_block(NULL);
3717 }
3718
3719 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3720 {
3721         if(get_cur_block() == NULL)
3722                 return NULL;
3723
3724         return expression_to_firm(statement->expression);
3725 }
3726
3727 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3728 {
3729         ir_node     *result    = NULL;
3730         statement_t *statement = compound->statements;
3731         for( ; statement != NULL; statement = statement->base.next) {
3732                 //context2firm(&statement->scope);
3733
3734                 if(statement->base.next == NULL
3735                                 && statement->kind == STATEMENT_EXPRESSION) {
3736                         result = expression_statement_to_firm(
3737                                         &statement->expression);
3738                         break;
3739                 }
3740                 statement_to_firm(statement);
3741         }
3742
3743         return result;
3744 }
3745
3746 static void create_global_variable(declaration_t *declaration)
3747 {
3748         ir_visibility  vis;
3749         ir_type       *var_type;
3750         switch ((storage_class_tag_t)declaration->storage_class) {
3751                 case STORAGE_CLASS_STATIC:
3752                         vis = visibility_local;
3753                         goto global_var;
3754
3755                 case STORAGE_CLASS_EXTERN:
3756                         vis = visibility_external_allocated;
3757                         goto global_var;
3758
3759                 case STORAGE_CLASS_NONE:
3760                         vis = visibility_external_visible;
3761                         goto global_var;
3762
3763                 case STORAGE_CLASS_THREAD:
3764                         vis = visibility_external_visible;
3765                         goto tls_var;
3766
3767                 case STORAGE_CLASS_THREAD_EXTERN:
3768                         vis = visibility_external_allocated;
3769                         goto tls_var;
3770
3771                 case STORAGE_CLASS_THREAD_STATIC:
3772                         vis = visibility_local;
3773                         goto tls_var;
3774
3775 tls_var:
3776                         var_type = get_tls_type();
3777                         goto create_var;
3778
3779 global_var:
3780                         var_type = get_glob_type();
3781                         goto create_var;
3782
3783 create_var:
3784                         create_declaration_entity(declaration,
3785                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
3786                                                   var_type);
3787                         set_entity_visibility(declaration->v.entity, vis);
3788
3789                         return;
3790
3791                 case STORAGE_CLASS_TYPEDEF:
3792                 case STORAGE_CLASS_AUTO:
3793                 case STORAGE_CLASS_REGISTER:
3794                 case STORAGE_CLASS_ENUM_ENTRY:
3795                         break;
3796         }
3797         panic("Invalid storage class for global variable");
3798 }
3799
3800 static void create_local_declaration(declaration_t *declaration)
3801 {
3802         if(declaration->symbol == NULL)
3803                 return;
3804
3805         type_t *type = skip_typeref(declaration->type);
3806
3807         switch ((storage_class_tag_t) declaration->storage_class) {
3808         case STORAGE_CLASS_STATIC:
3809                 create_local_static_variable(declaration);
3810                 return;
3811         case STORAGE_CLASS_EXTERN:
3812                 create_global_variable(declaration);
3813                 create_declaration_initializer(declaration);
3814                 return;
3815         case STORAGE_CLASS_NONE:
3816         case STORAGE_CLASS_AUTO:
3817         case STORAGE_CLASS_REGISTER:
3818                 if(is_type_function(type)) {
3819                         if(declaration->init.statement != NULL) {
3820                                 panic("nested functions not supported yet");
3821                         } else {
3822                                 get_function_entity(declaration);
3823                         }
3824                 } else {
3825                         create_local_variable(declaration);
3826                 }
3827                 return;
3828         case STORAGE_CLASS_ENUM_ENTRY:
3829         case STORAGE_CLASS_TYPEDEF:
3830         case STORAGE_CLASS_THREAD:
3831         case STORAGE_CLASS_THREAD_EXTERN:
3832         case STORAGE_CLASS_THREAD_STATIC:
3833                 return;
3834         }
3835         panic("invalid storage class found");
3836 }
3837
3838 static void declaration_statement_to_firm(declaration_statement_t *statement)
3839 {
3840         declaration_t *declaration = statement->declarations_begin;
3841         declaration_t *end         = statement->declarations_end->next;
3842         for( ; declaration != end; declaration = declaration->next) {
3843                 if(declaration->namespc != NAMESPACE_NORMAL)
3844                         continue;
3845                 create_local_declaration(declaration);
3846         }
3847 }
3848
3849 static void if_statement_to_firm(if_statement_t *statement)
3850 {
3851         ir_node *cur_block = get_cur_block();
3852
3853         ir_node *fallthrough_block = new_immBlock();
3854
3855         /* the true (blocks) */
3856         ir_node *true_block;
3857         if (statement->true_statement != NULL) {
3858                 true_block = new_immBlock();
3859                 statement_to_firm(statement->true_statement);
3860                 if(get_cur_block() != NULL) {
3861                         ir_node *jmp = new_Jmp();
3862                         add_immBlock_pred(fallthrough_block, jmp);
3863                 }
3864         } else {
3865                 true_block = fallthrough_block;
3866         }
3867
3868         /* the false (blocks) */
3869         ir_node *false_block;
3870         if(statement->false_statement != NULL) {
3871                 false_block = new_immBlock();
3872
3873                 statement_to_firm(statement->false_statement);
3874                 if(get_cur_block() != NULL) {
3875                         ir_node *jmp = new_Jmp();
3876                         add_immBlock_pred(fallthrough_block, jmp);
3877                 }
3878         } else {
3879                 false_block = fallthrough_block;
3880         }
3881
3882         /* create the condition */
3883         if(cur_block != NULL) {
3884                 set_cur_block(cur_block);
3885                 create_condition_evaluation(statement->condition, true_block,
3886                                             false_block);
3887         }
3888
3889         mature_immBlock(true_block);
3890         if(false_block != fallthrough_block) {
3891                 mature_immBlock(false_block);
3892         }
3893         mature_immBlock(fallthrough_block);
3894
3895         set_cur_block(fallthrough_block);
3896 }
3897
3898 static void while_statement_to_firm(while_statement_t *statement)
3899 {
3900         ir_node *jmp = NULL;
3901         if(get_cur_block() != NULL) {
3902                 jmp = new_Jmp();
3903         }
3904
3905         /* create the header block */
3906         ir_node *header_block = new_immBlock();
3907         if(jmp != NULL) {
3908                 add_immBlock_pred(header_block, jmp);
3909         }
3910
3911         /* the false block */
3912         ir_node *false_block = new_immBlock();
3913
3914         /* the loop body */
3915         ir_node *body_block;
3916         if (statement->body != NULL) {
3917                 ir_node *old_continue_label = continue_label;
3918                 ir_node *old_break_label    = break_label;
3919                 continue_label              = header_block;
3920                 break_label                 = false_block;
3921
3922                 body_block = new_immBlock();
3923                 statement_to_firm(statement->body);
3924
3925                 assert(continue_label == header_block);
3926                 assert(break_label    == false_block);
3927                 continue_label = old_continue_label;
3928                 break_label    = old_break_label;
3929
3930                 if(get_cur_block() != NULL) {
3931                         jmp = new_Jmp();
3932                         add_immBlock_pred(header_block, jmp);
3933                 }
3934         } else {
3935                 body_block = header_block;
3936         }
3937
3938         /* create the condition */
3939         set_cur_block(header_block);
3940
3941         create_condition_evaluation(statement->condition, body_block, false_block);
3942         mature_immBlock(body_block);
3943         mature_immBlock(false_block);
3944         mature_immBlock(header_block);
3945
3946         set_cur_block(false_block);
3947 }
3948
3949 static void do_while_statement_to_firm(do_while_statement_t *statement)
3950 {
3951         ir_node *jmp = NULL;
3952         if(get_cur_block() != NULL) {
3953                 jmp = new_Jmp();
3954         }
3955
3956         /* create the header block */
3957         ir_node *header_block = new_immBlock();
3958
3959         /* the false block */
3960         ir_node *false_block = new_immBlock();
3961
3962         /* the loop body */
3963         ir_node *body_block = new_immBlock();
3964         if(jmp != NULL) {
3965                 add_immBlock_pred(body_block, jmp);
3966         }
3967
3968         if (statement->body != NULL) {
3969                 ir_node *old_continue_label = continue_label;
3970                 ir_node *old_break_label    = break_label;
3971                 continue_label              = header_block;
3972                 break_label                 = false_block;
3973
3974                 statement_to_firm(statement->body);
3975
3976                 assert(continue_label == header_block);
3977                 assert(break_label    == false_block);
3978                 continue_label = old_continue_label;
3979                 break_label    = old_break_label;
3980
3981                 if (get_cur_block() == NULL) {
3982                         mature_immBlock(header_block);
3983                         mature_immBlock(body_block);
3984                         mature_immBlock(false_block);
3985                         return;
3986                 }
3987         }
3988
3989         ir_node *body_jmp = new_Jmp();
3990         add_immBlock_pred(header_block, body_jmp);
3991         mature_immBlock(header_block);
3992
3993         /* create the condition */
3994         set_cur_block(header_block);
3995
3996         create_condition_evaluation(statement->condition, body_block, false_block);
3997         mature_immBlock(body_block);
3998         mature_immBlock(false_block);
3999         mature_immBlock(header_block);
4000
4001         set_cur_block(false_block);
4002 }
4003
4004 static void for_statement_to_firm(for_statement_t *statement)
4005 {
4006         ir_node *jmp = NULL;
4007         if (get_cur_block() != NULL) {
4008                 if(statement->initialisation != NULL) {
4009                         expression_to_firm(statement->initialisation);
4010                 }
4011
4012                 /* create declarations */
4013                 declaration_t *declaration = statement->scope.declarations;
4014                 for( ; declaration != NULL; declaration = declaration->next) {
4015                         create_local_declaration(declaration);
4016                 }
4017
4018                 jmp = new_Jmp();
4019         }
4020
4021
4022         /* create the step block */
4023         ir_node *const step_block = new_immBlock();
4024         if (statement->step != NULL) {
4025                 expression_to_firm(statement->step);
4026         }
4027         ir_node *const step_jmp = new_Jmp();
4028
4029         /* create the header block */
4030         ir_node *const header_block = new_immBlock();
4031         if (jmp != NULL) {
4032                 add_immBlock_pred(header_block, jmp);
4033         }
4034         add_immBlock_pred(header_block, step_jmp);
4035
4036         /* the false block */
4037         ir_node *const false_block = new_immBlock();
4038
4039         /* the loop body */
4040         ir_node * body_block;
4041         if (statement->body != NULL) {
4042                 ir_node *const old_continue_label = continue_label;
4043                 ir_node *const old_break_label    = break_label;
4044                 continue_label = step_block;
4045                 break_label    = false_block;
4046
4047                 body_block = new_immBlock();
4048                 statement_to_firm(statement->body);
4049
4050                 assert(continue_label == step_block);
4051                 assert(break_label    == false_block);
4052                 continue_label = old_continue_label;
4053                 break_label    = old_break_label;
4054
4055                 if (get_cur_block() != NULL) {
4056                         jmp = new_Jmp();
4057                         add_immBlock_pred(step_block, jmp);
4058                 }
4059         } else {
4060                 body_block = step_block;
4061         }
4062
4063         /* create the condition */
4064         set_cur_block(header_block);
4065         if (statement->condition != NULL) {
4066                 create_condition_evaluation(statement->condition, body_block,
4067                                             false_block);
4068         } else {
4069                 keep_alive(header_block);
4070                 jmp = new_Jmp();
4071                 add_immBlock_pred(body_block, jmp);
4072         }
4073
4074         mature_immBlock(body_block);
4075         mature_immBlock(false_block);
4076         mature_immBlock(step_block);
4077         mature_immBlock(header_block);
4078         mature_immBlock(false_block);
4079
4080         set_cur_block(false_block);
4081 }
4082
4083 static void create_jump_statement(const statement_t *statement,
4084                                   ir_node *target_block)
4085 {
4086         if(get_cur_block() == NULL)
4087                 return;
4088
4089         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4090         ir_node  *jump = new_d_Jmp(dbgi);
4091         add_immBlock_pred(target_block, jump);
4092
4093         set_cur_block(NULL);
4094 }
4095
4096 static void switch_statement_to_firm(const switch_statement_t *statement)
4097 {
4098         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4099
4100         ir_node *expression  = expression_to_firm(statement->expression);
4101         ir_node *cond        = new_d_Cond(dbgi, expression);
4102         ir_node *break_block = new_immBlock();
4103
4104         set_cur_block(NULL);
4105
4106         ir_node *const old_switch_cond       = current_switch_cond;
4107         ir_node *const old_break_label       = break_label;
4108         const bool     old_saw_default_label = saw_default_label;
4109         current_switch_cond                  = cond;
4110         break_label                          = break_block;
4111
4112         if (statement->body != NULL) {
4113                 statement_to_firm(statement->body);
4114         }
4115
4116         if(get_cur_block() != NULL) {
4117                 ir_node *jmp = new_Jmp();
4118                 add_immBlock_pred(break_block, jmp);
4119         }
4120
4121         if (!saw_default_label) {
4122                 set_cur_block(get_nodes_block(cond));
4123                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4124                                                         MAGIC_DEFAULT_PN_NUMBER);
4125                 add_immBlock_pred(break_block, proj);
4126         }
4127
4128         assert(current_switch_cond == cond);
4129         assert(break_label         == break_block);
4130         current_switch_cond = old_switch_cond;
4131         break_label         = old_break_label;
4132         saw_default_label   = old_saw_default_label;
4133
4134         mature_immBlock(break_block);
4135         set_cur_block(break_block);
4136 }
4137
4138 static void case_label_to_firm(const case_label_statement_t *statement)
4139 {
4140         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4141
4142         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4143
4144         /* let's create a node and hope firm constant folding creates a Const
4145          * node... */
4146         ir_node *proj;
4147         ir_node *old_block = get_nodes_block(current_switch_cond);
4148         ir_node *block     = new_immBlock();
4149
4150         set_cur_block(old_block);
4151         if(statement->expression != NULL) {
4152                 long start_pn = fold_constant(statement->expression);
4153                 long end_pn = start_pn;
4154                 if (statement->end_range != NULL) {
4155                         end_pn = fold_constant(statement->end_range);
4156                 }
4157                 assert(start_pn <= end_pn);
4158                 /* create jumps for all cases in the given range */
4159                 for (long pn = start_pn; pn <= end_pn; ++pn) {
4160                         if(pn == MAGIC_DEFAULT_PN_NUMBER) {
4161                                 /* oops someone detected our cheating... */
4162                                 panic("magic default pn used");
4163                         }
4164                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4165                         add_immBlock_pred(block, proj);
4166                 }
4167         } else {
4168                 saw_default_label = true;
4169                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4170                                          MAGIC_DEFAULT_PN_NUMBER);
4171
4172                 add_immBlock_pred(block, proj);
4173         }
4174
4175         if (fallthrough != NULL) {
4176                 add_immBlock_pred(block, fallthrough);
4177         }
4178         mature_immBlock(block);
4179         set_cur_block(block);
4180
4181         if(statement->statement != NULL) {
4182                 statement_to_firm(statement->statement);
4183         }
4184 }
4185
4186 static ir_node *get_label_block(declaration_t *label)
4187 {
4188         assert(label->namespc == NAMESPACE_LABEL);
4189
4190         if(label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
4191                 return label->v.block;
4192         }
4193         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
4194
4195         ir_node *old_cur_block = get_cur_block();
4196         ir_node *block         = new_immBlock();
4197         set_cur_block(old_cur_block);
4198
4199         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
4200         label->v.block          = block;
4201
4202         ARR_APP1(ir_node *, imature_blocks, block);
4203
4204         return block;
4205 }
4206
4207 static void label_to_firm(const label_statement_t *statement)
4208 {
4209         ir_node *block = get_label_block(statement->label);
4210
4211         if(get_cur_block() != NULL) {
4212                 ir_node *jmp = new_Jmp();
4213                 add_immBlock_pred(block, jmp);
4214         }
4215
4216         set_cur_block(block);
4217         keep_alive(block);
4218
4219         if(statement->statement != NULL) {
4220                 statement_to_firm(statement->statement);
4221         }
4222 }
4223
4224 static void goto_to_firm(const goto_statement_t *statement)
4225 {
4226         if(get_cur_block() == NULL)
4227                 return;
4228
4229         ir_node *block = get_label_block(statement->label);
4230         ir_node *jmp   = new_Jmp();
4231         add_immBlock_pred(block, jmp);
4232
4233         set_cur_block(NULL);
4234 }
4235
4236 typedef enum modifier_t {
4237         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
4238         ASM_MODIFIER_READ_WRITE   = 1 << 1,
4239         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
4240         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
4241 } modifier_t;
4242
4243 static void asm_statement_to_firm(const asm_statement_t *statement)
4244 {
4245         (void) statement;
4246         fprintf(stderr, "WARNING asm not implemented yet!\n");
4247 #if 0
4248         bool needs_memory = false;
4249
4250         size_t         n_clobbers = 0;
4251         asm_clobber_t *clobber    = statement->clobbers;
4252         for( ; clobber != NULL; clobber = clobber->next) {
4253                 if(strcmp(clobber->clobber, "memory") == 0) {
4254                         needs_memory = true;
4255                         continue;
4256                 }
4257
4258                 ident *id = new_id_from_str(clobber->clobber);
4259                 obstack_ptr_grow(&asm_obst, id);
4260                 ++n_clobbers;
4261         }
4262         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4263         ident **clobbers = NULL;
4264         if(n_clobbers > 0) {
4265                 clobbers = obstack_finish(&asm_obst);
4266         }
4267
4268         /* find and count input and output constraints */
4269         asm_constraint_t *constraint = statement->inputs;
4270         for( ; constraint != NULL; constraint = constraint->next) {
4271                 int  modifiers      = 0;
4272                 bool supports_memop = false;
4273                 for(const char *c = constraint->constraints; *c != 0; ++c) {
4274                         /* TODO: improve error messages */
4275                         switch(*c) {
4276                         case '?':
4277                         case '!':
4278                                 panic("multiple alternative assembler constraints not "
4279                                       "supported");
4280                         case 'm':
4281                         case 'o':
4282                         case 'V':
4283                         case '<':
4284                         case '>':
4285                         case 'X':
4286                                 supports_memop = true;
4287                                 obstack_1grow(&asm_obst, *c);
4288                                 break;
4289                         case '=':
4290                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
4291                                         panic("inconsistent register constraints");
4292                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
4293                                 break;
4294                         case '+':
4295                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
4296                                         panic("inconsistent register constraints");
4297                                 modifiers |= ASM_MODIFIER_READ_WRITE;
4298                                 break;
4299                         case '&':
4300                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
4301                                 panic("early clobber assembler constraint not supported yet");
4302                                 break;
4303                         case '%':
4304                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
4305                                 panic("commutative assembler constraint not supported yet");
4306                                 break;
4307                         case '#':
4308                                 /* skip register preferences stuff... */
4309                                 while(*c != 0 && *c != ',')
4310                                         ++c;
4311                                 break;
4312                         case '*':
4313                                 /* skip register preferences stuff... */
4314                                 ++c;
4315                                 break;
4316                         default:
4317                                 obstack_1grow(&asm_obst, *c);
4318                                 break;
4319                         }
4320                 }
4321                 obstack_1grow(&asm_obst, '\0');
4322                 const char *constraint_string = obstack_finish(&asm_obst);
4323
4324                 needs_memory |= supports_memop;
4325                 if(supports_memop) {
4326
4327                 }
4328         }
4329 #endif
4330 }
4331
4332 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4333         statement_to_firm(statement->try_statement);
4334         warningf(&statement->base.source_position, "structured exception handling ignored");
4335 }
4336
4337 static void     leave_statement_to_firm(leave_statement_t *statement) {
4338         errorf(&statement->base.source_position, "__leave not supported yet");
4339 }
4340
4341 static void statement_to_firm(statement_t *statement)
4342 {
4343         switch(statement->kind) {
4344         case STATEMENT_INVALID:
4345                 panic("invalid statement found");
4346                 return;
4347         case STATEMENT_EMPTY:
4348                 /* nothing */
4349                 return;
4350         case STATEMENT_COMPOUND:
4351                 compound_statement_to_firm(&statement->compound);
4352                 return;
4353         case STATEMENT_RETURN:
4354                 return_statement_to_firm(&statement->returns);
4355                 return;
4356         case STATEMENT_EXPRESSION:
4357                 expression_statement_to_firm(&statement->expression);
4358                 return;
4359         case STATEMENT_IF:
4360                 if_statement_to_firm(&statement->ifs);
4361                 return;
4362         case STATEMENT_WHILE:
4363                 while_statement_to_firm(&statement->whiles);
4364                 return;
4365         case STATEMENT_DO_WHILE:
4366                 do_while_statement_to_firm(&statement->do_while);
4367                 return;
4368         case STATEMENT_DECLARATION:
4369                 declaration_statement_to_firm(&statement->declaration);
4370                 return;
4371         case STATEMENT_BREAK:
4372                 create_jump_statement(statement, break_label);
4373                 return;
4374         case STATEMENT_CONTINUE:
4375                 create_jump_statement(statement, continue_label);
4376                 return;
4377         case STATEMENT_SWITCH:
4378                 switch_statement_to_firm(&statement->switchs);
4379                 return;
4380         case STATEMENT_CASE_LABEL:
4381                 case_label_to_firm(&statement->case_label);
4382                 return;
4383         case STATEMENT_FOR:
4384                 for_statement_to_firm(&statement->fors);
4385                 return;
4386         case STATEMENT_LABEL:
4387                 label_to_firm(&statement->label);
4388                 return;
4389         case STATEMENT_GOTO:
4390                 goto_to_firm(&statement->gotos);
4391                 return;
4392         case STATEMENT_ASM:
4393                 asm_statement_to_firm(&statement->asms);
4394                 return;
4395         case STATEMENT_MS_TRY:
4396                 ms_try_statement_to_firm(&statement->ms_try);
4397                 return;
4398         case STATEMENT_LEAVE:
4399                 leave_statement_to_firm(&statement->leave);
4400                 return;
4401         }
4402         panic("Statement not implemented\n");
4403 }
4404
4405 static int count_decls_in_expression(const expression_t *expression);
4406
4407 static int count_local_declarations(const declaration_t *      decl,
4408                                     const declaration_t *const end)
4409 {
4410         int count = 0;
4411         for (; decl != end; decl = decl->next) {
4412                 if(decl->namespc != NAMESPACE_NORMAL)
4413                         continue;
4414                 const type_t *type = skip_typeref(decl->type);
4415                 if (!decl->address_taken && is_type_scalar(type))
4416                         ++count;
4417                 const initializer_t *initializer = decl->init.initializer;
4418                 /* FIXME: should walk initializer hierarchies... */
4419                 if(initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4420                         count += count_decls_in_expression(initializer->value.value);
4421                 }
4422         }
4423         return count;
4424 }
4425
4426 static int count_decls_in_expression(const expression_t *expression) {
4427         int count = 0;
4428
4429         if(expression == NULL)
4430                 return 0;
4431
4432         switch((expression_kind_t) expression->base.kind) {
4433         case EXPR_STATEMENT:
4434                 return count_decls_in_stmts(expression->statement.statement);
4435         EXPR_BINARY_CASES {
4436                 int count_left  = count_decls_in_expression(expression->binary.left);
4437                 int count_right = count_decls_in_expression(expression->binary.right);
4438                 return count_left + count_right;
4439         }
4440         EXPR_UNARY_CASES
4441                 return count_decls_in_expression(expression->unary.value);
4442         case EXPR_CALL: {
4443                 call_argument_t *argument = expression->call.arguments;
4444                 for( ; argument != NULL; argument = argument->next) {
4445                         count += count_decls_in_expression(argument->expression);
4446                 }
4447                 return count;
4448         }
4449
4450         case EXPR_UNKNOWN:
4451         case EXPR_INVALID:
4452                 panic("unexpected expression kind");
4453
4454         case EXPR_COMPOUND_LITERAL:
4455                 /* TODO... */
4456                 break;
4457
4458         case EXPR_CONDITIONAL:
4459                 count += count_decls_in_expression(expression->conditional.condition);
4460                 count += count_decls_in_expression(expression->conditional.true_expression);
4461                 count += count_decls_in_expression(expression->conditional.false_expression);
4462                 return count;
4463
4464         case EXPR_BUILTIN_PREFETCH:
4465                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
4466                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
4467                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
4468                 return count;
4469
4470         case EXPR_BUILTIN_CONSTANT_P:
4471                 count += count_decls_in_expression(expression->builtin_constant.value);
4472                 return count;
4473
4474         case EXPR_SELECT:
4475                 count += count_decls_in_expression(expression->select.compound);
4476                 return count;
4477
4478         case EXPR_ARRAY_ACCESS:
4479                 count += count_decls_in_expression(expression->array_access.array_ref);
4480                 count += count_decls_in_expression(expression->array_access.index);
4481                 return count;
4482
4483         case EXPR_CLASSIFY_TYPE:
4484                 count += count_decls_in_expression(expression->classify_type.type_expression);
4485                 return count;
4486
4487         case EXPR_SIZEOF:
4488         case EXPR_ALIGNOF: {
4489                 expression_t *tp_expression = expression->typeprop.tp_expression;
4490                 if (tp_expression != NULL) {
4491                         count += count_decls_in_expression(tp_expression);
4492                 }
4493                 return count;
4494         }
4495
4496         case EXPR_OFFSETOF:
4497         case EXPR_REFERENCE:
4498         case EXPR_CONST:
4499         case EXPR_CHARACTER_CONSTANT:
4500         case EXPR_WIDE_CHARACTER_CONSTANT:
4501         case EXPR_STRING_LITERAL:
4502         case EXPR_WIDE_STRING_LITERAL:
4503         case EXPR_FUNCNAME:
4504         case EXPR_BUILTIN_SYMBOL:
4505         case EXPR_VA_START:
4506         case EXPR_VA_ARG:
4507                 break;
4508         }
4509
4510         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
4511          * (or implement all the missing expressions here/implement a walker)
4512          */
4513
4514         return 0;
4515 }
4516
4517 static int count_decls_in_stmts(const statement_t *stmt)
4518 {
4519         int count = 0;
4520         for (; stmt != NULL; stmt = stmt->base.next) {
4521                 switch (stmt->kind) {
4522                         case STATEMENT_EMPTY:
4523                                 break;
4524
4525                         case STATEMENT_DECLARATION: {
4526                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
4527                                 count += count_local_declarations(decl_stmt->declarations_begin,
4528                                                                   decl_stmt->declarations_end->next);
4529                                 break;
4530                         }
4531
4532                         case STATEMENT_COMPOUND: {
4533                                 const compound_statement_t *const comp =
4534                                         &stmt->compound;
4535                                 count += count_decls_in_stmts(comp->statements);
4536                                 break;
4537                         }
4538
4539                         case STATEMENT_IF: {
4540                                 const if_statement_t *const if_stmt = &stmt->ifs;
4541                                 count += count_decls_in_expression(if_stmt->condition);
4542                                 count += count_decls_in_stmts(if_stmt->true_statement);
4543                                 count += count_decls_in_stmts(if_stmt->false_statement);
4544                                 break;
4545                         }
4546
4547                         case STATEMENT_SWITCH: {
4548                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
4549                                 count += count_decls_in_expression(switch_stmt->expression);
4550                                 count += count_decls_in_stmts(switch_stmt->body);
4551                                 break;
4552                         }
4553
4554                         case STATEMENT_LABEL: {
4555                                 const label_statement_t *const label_stmt = &stmt->label;
4556                                 if(label_stmt->statement != NULL) {
4557                                         count += count_decls_in_stmts(label_stmt->statement);
4558                                 }
4559                                 break;
4560                         }
4561
4562                         case STATEMENT_WHILE: {
4563                                 const while_statement_t *const while_stmt = &stmt->whiles;
4564                                 count += count_decls_in_expression(while_stmt->condition);
4565                                 count += count_decls_in_stmts(while_stmt->body);
4566                                 break;
4567                         }
4568
4569                         case STATEMENT_DO_WHILE: {
4570                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
4571                                 count += count_decls_in_expression(do_while_stmt->condition);
4572                                 count += count_decls_in_stmts(do_while_stmt->body);
4573                                 break;
4574                         }
4575
4576                         case STATEMENT_FOR: {
4577                                 const for_statement_t *const for_stmt = &stmt->fors;
4578                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
4579                                 count += count_decls_in_expression(for_stmt->initialisation);
4580                                 count += count_decls_in_expression(for_stmt->condition);
4581                                 count += count_decls_in_expression(for_stmt->step);
4582                                 count += count_decls_in_stmts(for_stmt->body);
4583                                 break;
4584                         }
4585
4586                         case STATEMENT_CASE_LABEL: {
4587                                 const case_label_statement_t *label = &stmt->case_label;
4588                                 count += count_decls_in_expression(label->expression);
4589                                 if(label->statement != NULL) {
4590                                         count += count_decls_in_stmts(label->statement);
4591                                 }
4592                                 break;
4593                         }
4594
4595                         case STATEMENT_ASM:
4596                         case STATEMENT_BREAK:
4597                         case STATEMENT_CONTINUE:
4598                                 break;
4599
4600                         case STATEMENT_EXPRESSION: {
4601                                 const expression_statement_t *expr_stmt = &stmt->expression;
4602                                 count += count_decls_in_expression(expr_stmt->expression);
4603                                 break;
4604                         }
4605
4606                         case STATEMENT_GOTO:
4607                         case STATEMENT_LEAVE:
4608                         case STATEMENT_INVALID:
4609                                 break;
4610
4611                         case STATEMENT_RETURN: {
4612                                 const return_statement_t *ret_stmt = &stmt->returns;
4613                                 count += count_decls_in_expression(ret_stmt->value);
4614                                 break;
4615                         }
4616
4617                         case STATEMENT_MS_TRY: {
4618                                 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
4619                                 count += count_decls_in_stmts(try_stmt->try_statement);
4620                                 if(try_stmt->except_expression != NULL)
4621                                         count += count_decls_in_expression(try_stmt->except_expression);
4622                                 count += count_decls_in_stmts(try_stmt->final_statement);
4623                                 break;
4624                         }
4625                 }
4626         }
4627         return count;
4628 }
4629
4630 static int get_function_n_local_vars(declaration_t *declaration)
4631 {
4632         int count = 0;
4633
4634         /* count parameters */
4635         count += count_local_declarations(declaration->scope.declarations, NULL);
4636
4637         /* count local variables declared in body */
4638         count += count_decls_in_stmts(declaration->init.statement);
4639
4640         return count;
4641 }
4642
4643 static void initialize_function_parameters(declaration_t *declaration)
4644 {
4645         ir_graph        *irg             = current_ir_graph;
4646         ir_node         *args            = get_irg_args(irg);
4647         ir_node         *start_block     = get_irg_start_block(irg);
4648         ir_type         *function_irtype = get_ir_type(declaration->type);
4649
4650         int            n         = 0;
4651         declaration_t *parameter = declaration->scope.declarations;
4652         for( ; parameter != NULL; parameter = parameter->next, ++n) {
4653                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
4654                 type_t *type = skip_typeref(parameter->type);
4655
4656                 bool needs_entity = parameter->address_taken;
4657                 assert(!is_type_array(type));
4658                 if(is_type_compound(type)) {
4659                         needs_entity = true;
4660                 }
4661
4662                 if(needs_entity) {
4663                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
4664                         ident     *id     = new_id_from_str(parameter->symbol->string);
4665                         set_entity_ident(entity, id);
4666
4667                         parameter->declaration_kind
4668                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
4669                         parameter->v.entity = entity;
4670                         continue;
4671                 }
4672
4673                 ir_mode *mode = get_ir_mode(parameter->type);
4674                 long     pn   = n;
4675                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
4676
4677                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
4678                 parameter->v.value_number   = next_value_number_function;
4679                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
4680                 ++next_value_number_function;
4681
4682                 set_value(parameter->v.value_number, proj);
4683         }
4684 }
4685
4686 /**
4687  * Handle additional decl modifiers for IR-graphs
4688  *
4689  * @param irg            the IR-graph
4690  * @param dec_modifiers  additional modifiers
4691  */
4692 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
4693 {
4694         if (decl_modifiers & DM_NORETURN) {
4695                 /* TRUE if the declaration includes the Microsoft
4696                    __declspec(noreturn) specifier. */
4697                 set_irg_additional_property(irg, mtp_property_noreturn);
4698         }
4699         if (decl_modifiers & DM_NOTHROW) {
4700                 /* TRUE if the declaration includes the Microsoft
4701                    __declspec(nothrow) specifier. */
4702                 set_irg_additional_property(irg, mtp_property_nothrow);
4703         }
4704         if (decl_modifiers & DM_NAKED) {
4705                 /* TRUE if the declaration includes the Microsoft
4706                    __declspec(naked) specifier. */
4707                 set_irg_additional_property(irg, mtp_property_naked);
4708         }
4709         if (decl_modifiers & DM_FORCEINLINE) {
4710                 /* TRUE if the declaration includes the
4711                    Microsoft __forceinline specifier. */
4712                 set_irg_inline_property(irg, irg_inline_forced);
4713         }
4714         if (decl_modifiers & DM_NOINLINE) {
4715                 /* TRUE if the declaration includes the Microsoft
4716                    __declspec(noinline) specifier. */
4717                 set_irg_inline_property(irg, irg_inline_forbidden);
4718         }
4719 }
4720
4721 static void create_function(declaration_t *declaration)
4722 {
4723         ir_entity *function_entity = get_function_entity(declaration);
4724
4725         if(declaration->init.statement == NULL)
4726                 return;
4727
4728         current_function_decl = declaration;
4729         current_function_name = NULL;
4730         current_funcsig       = NULL;
4731
4732         assert(imature_blocks == NULL);
4733         imature_blocks = NEW_ARR_F(ir_node*, 0);
4734
4735         int       n_local_vars = get_function_n_local_vars(declaration);
4736         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
4737
4738         set_irg_fp_model(irg, firm_opt.fp_model);
4739         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
4740         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
4741
4742         ir_node *first_block = get_cur_block();
4743
4744         /* set inline flags */
4745         if (declaration->is_inline)
4746                 set_irg_inline_property(irg, irg_inline_recomended);
4747         handle_decl_modifier_irg(irg, declaration->decl_modifiers);
4748
4749         next_value_number_function = 0;
4750         initialize_function_parameters(declaration);
4751
4752         statement_to_firm(declaration->init.statement);
4753
4754         ir_node *end_block = get_irg_end_block(irg);
4755
4756         /* do we have a return statement yet? */
4757         if(get_cur_block() != NULL) {
4758                 type_t *type = skip_typeref(declaration->type);
4759                 assert(is_type_function(type));
4760                 const function_type_t *func_type   = &type->function;
4761                 const type_t          *return_type
4762                         = skip_typeref(func_type->return_type);
4763
4764                 ir_node *ret;
4765                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
4766                         ret = new_Return(get_store(), 0, NULL);
4767                 } else {
4768                         ir_mode *mode;
4769                         if(is_type_scalar(return_type)) {
4770                                 mode = get_ir_mode(func_type->return_type);
4771                         } else {
4772                                 mode = mode_P_data;
4773                         }
4774
4775                         ir_node *in[1];
4776                         /* §5.1.2.2.3 main implicitly returns 0 */
4777                         if (strcmp(declaration->symbol->string, "main") == 0) {
4778                                 in[0] = new_Const(mode, get_mode_null(mode));
4779                         } else {
4780                                 in[0] = new_Unknown(mode);
4781                         }
4782                         ret = new_Return(get_store(), 1, in);
4783                 }
4784                 add_immBlock_pred(end_block, ret);
4785         }
4786
4787         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
4788                 mature_immBlock(imature_blocks[i]);
4789         }
4790         DEL_ARR_F(imature_blocks);
4791         imature_blocks = NULL;
4792
4793         mature_immBlock(first_block);
4794         mature_immBlock(end_block);
4795
4796         irg_finalize_cons(irg);
4797
4798         /* finalize the frame type */
4799         ir_type *frame_type = get_irg_frame_type(irg);
4800         int      n          = get_compound_n_members(frame_type);
4801         int      align_all  = 4;
4802         int      offset     = 0;
4803         for(int i = 0; i < n; ++i) {
4804                 ir_entity *entity      = get_compound_member(frame_type, i);
4805                 ir_type   *entity_type = get_entity_type(entity);
4806
4807                 int align = get_type_alignment_bytes(entity_type);
4808                 if(align > align_all)
4809                         align_all = align;
4810                 int misalign = 0;
4811                 if(align > 0) {
4812                         misalign  = offset % align;
4813                         if(misalign > 0) {
4814                                 offset += align - misalign;
4815                         }
4816                 }
4817
4818                 set_entity_offset(entity, offset);
4819                 offset += get_type_size_bytes(entity_type);
4820         }
4821         set_type_size_bytes(frame_type, offset);
4822         set_type_alignment_bytes(frame_type, align_all);
4823
4824         irg_vrfy(irg);
4825 }
4826
4827 static void scope_to_firm(scope_t *scope)
4828 {
4829         /* first pass: create declarations */
4830         declaration_t *declaration = scope->declarations;
4831         for( ; declaration != NULL; declaration = declaration->next) {
4832                 if(declaration->namespc != NAMESPACE_NORMAL)
4833                         continue;
4834                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4835                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4836                         continue;
4837                 if(declaration->symbol == NULL)
4838                         continue;
4839
4840                 type_t *type = skip_typeref(declaration->type);
4841                 if(is_type_function(type)) {
4842                         get_function_entity(declaration);
4843                 } else {
4844                         create_global_variable(declaration);
4845                 }
4846         }
4847
4848         /* second pass: create code/initializers */
4849         declaration = scope->declarations;
4850         for( ; declaration != NULL; declaration = declaration->next) {
4851                 if(declaration->namespc != NAMESPACE_NORMAL)
4852                         continue;
4853                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4854                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4855                         continue;
4856                 if(declaration->symbol == NULL)
4857                         continue;
4858
4859                 type_t *type = declaration->type;
4860                 if(type->kind == TYPE_FUNCTION) {
4861                         create_function(declaration);
4862                 } else {
4863                         assert(declaration->declaration_kind
4864                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
4865                         current_ir_graph = get_const_code_irg();
4866                         create_declaration_initializer(declaration);
4867                 }
4868         }
4869 }
4870
4871 void init_ast2firm(void)
4872 {
4873         obstack_init(&asm_obst);
4874         init_atomic_modes();
4875
4876         id_underscore = new_id_from_chars("_", 1);
4877         id_imp        = new_id_from_chars("__imp_", 6);
4878
4879         /* OS option must be set to the backend */
4880         const char *s = "ia32-gasmode=linux";
4881         switch (firm_opt.os_support) {
4882         case OS_SUPPORT_WIN32:
4883                 create_ld_ident = create_ld_ident_win32;
4884                 s = "ia32-gasmode=mingw";
4885                 break;
4886         case OS_SUPPORT_LINUX:
4887                 create_ld_ident = create_ld_ident_linux_elf;
4888                 s = "ia32-gasmode=linux"; break;
4889                 break;
4890         case OS_SUPPORT_MACHO:
4891                 create_ld_ident = create_ld_ident_macho;
4892                 s = "ia32-gasmode=macho"; break;
4893                 break;
4894         }
4895         firm_be_option(s);
4896
4897         /* create idents for all known runtime functions */
4898         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
4899                 predef_idents[rts_data[i].id] = new_id_from_str(rts_data[i].name);
4900         }
4901 }
4902
4903 static void init_ir_types(void)
4904 {
4905         static int ir_types_initialized = 0;
4906         if(ir_types_initialized)
4907                 return;
4908         ir_types_initialized = 1;
4909
4910         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
4911         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
4912         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
4913
4914         ir_type_int        = get_ir_type(type_int);
4915         ir_type_const_char = get_ir_type(type_const_char);
4916         ir_type_wchar_t    = get_ir_type(type_wchar_t);
4917         ir_type_void       = get_ir_type(type_void);
4918 }
4919
4920 void exit_ast2firm(void)
4921 {
4922         obstack_free(&asm_obst, NULL);
4923 }
4924
4925 void translation_unit_to_firm(translation_unit_t *unit)
4926 {
4927         /* just to be sure */
4928         continue_label      = NULL;
4929         break_label         = NULL;
4930         current_switch_cond = NULL;
4931
4932         init_ir_types();
4933
4934         scope_to_firm(&unit->scope);
4935 }