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 static ir_type *ir_type_const_char;
  47 static ir_type *ir_type_wchar_t;
  48 static ir_type *ir_type_void;
  49 static ir_type *ir_type_int;
  50
  51 static type_t *type_const_char;
  52
  53 static int       next_value_number_function;
  54 static ir_node  *continue_label;
  55 static ir_node  *break_label;
  56 static ir_node  *current_switch_cond;
  57 static bool      saw_default_label;
  58 static ir_node **imature_blocks;
  59
  60 static const declaration_t *current_function_decl;
  61 static ir_node             *current_function_name;
  62 static ir_node             *current_funcsig;
  63
  64 static struct obstack asm_obst;
  65
  66 typedef enum declaration_kind_t {
  67         DECLARATION_KIND_UNKNOWN,
  68         DECLARATION_KIND_FUNCTION,
  69         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  70         DECLARATION_KIND_GLOBAL_VARIABLE,
  71         DECLARATION_KIND_LOCAL_VARIABLE,
  72         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  73         DECLARATION_KIND_COMPOUND_MEMBER,
  74         DECLARATION_KIND_LABEL_BLOCK,
  75         DECLARATION_KIND_ENUM_ENTRY
  76 } declaration_kind_t;
  77
  78 static ir_type *get_ir_type(type_t *type);
  79 static int count_decls_in_stmts(const statement_t *stmt);
  80
  81 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  82 {
  83         const declaration_t *declaration = get_irg_loc_description(irg, pos);
  84
  85         warningf(declaration->source_position,
  86                  "variable '%#T' might be used uninitialized",
  87                  declaration->type, declaration->symbol);
  88         return new_r_Unknown(irg, mode);
  89 }
  90
  91 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  92 {
  93         const source_position_t *pos = (const source_position_t*) dbg;
  94         if(pos == NULL)
  95                 return 0;
  96         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  97                                    pos->linenr);
  98 }
  99
 100 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 101 {
 102         const source_position_t *pos = (const source_position_t*) dbg;
 103         if(pos == NULL)
 104                 return NULL;
 105         if(line != NULL)
 106                 *line = pos->linenr;
 107         return pos->input_name;
 108 }
 109
 110 static dbg_info *get_dbg_info(const source_position_t *pos)
 111 {
 112         return (dbg_info*) pos;
 113 }
 114
 115 static unsigned unique_id = 0;
 116
 117 static ident *unique_ident(const char *tag)
 118 {
 119         char buf[256];
 120
 121         snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
 122         unique_id++;
 123         return new_id_from_str(buf);
 124 }
 125
 126 /**
 127  * Return the signed integer mode of size bytes.
 128  *
 129  * @param size   the size
 130  */
 131 static ir_mode *get_smode(unsigned size)
 132 {
 133         static ir_mode *s_modes[16 + 1] = {0, };
 134         ir_mode *res;
 135
 136         if (size <= 0 || size > 16)
 137                 return NULL;
 138
 139         res = s_modes[size];
 140         if (res == NULL) {
 141                 unsigned bits;
 142         char name[32];
 143
 144         bits = size * 8;
 145         snprintf(name, sizeof(name), "i%u", bits);
 146         res = new_ir_mode(name, irms_int_number, bits, 1, irma_twos_complement,
 147                                         bits <= machine_size ? machine_size : bits );
 148
 149                 s_modes[size] = res;
 150         }
 151         return res;
 152 }
 153
 154 /**
 155  * Return the unsigned integer mode of size bytes.
 156  *
 157  * @param size  the size
 158  */
 159 static ir_mode *get_umode(unsigned size)
 160 {
 161         static ir_mode *u_modes[16 + 1] = {0, };
 162         ir_mode *res;
 163
 164         if (size <= 0 || size > 16)
 165                 return NULL;
 166
 167         res = u_modes[size];
 168         if (res == NULL) {
 169                 unsigned bits;
 170                 char name[32];
 171
 172                 bits = size * 8;
 173                 snprintf(name, sizeof(name), "u%u", bits);
 174                 res = new_ir_mode(name, irms_int_number, bits, 0, irma_twos_complement,
 175                                                 bits <= machine_size ? machine_size : bits );
 176
 177                 u_modes[size] = res;
 178         }
 179         return res;
 180 }
 181
 182 /**
 183  * Return the pointer mode of size bytes.
 184  *
 185  * @param size  the size
 186  */
 187 static ir_mode *get_ptrmode(unsigned size, char *name)
 188 {
 189         static ir_mode *p_modes[16 + 1] = {0, };
 190         ir_mode *res;
 191
 192         if (size <= 0 || size > 16)
 193                 return NULL;
 194
 195         res = p_modes[size];
 196         if (res == NULL) {
 197                 unsigned bits;
 198                 char buf[32];
 199
 200                 bits = size * 8;
 201                 if (name == NULL) {
 202                         snprintf(buf, sizeof(buf), "p%u", bits);
 203                         name = buf;
 204                 }
 205                 res = new_ir_mode(name, irms_reference, bits, 0, irma_twos_complement,
 206                                                 bits <= machine_size ? machine_size : bits);
 207
 208                 p_modes[size] = res;
 209
 210                 set_reference_mode_signed_eq(res, get_smode(size));
 211                 set_reference_mode_unsigned_eq(res, get_umode(size));
 212         }
 213         return res;
 214 }
 215
 216 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 217
 218 static ir_mode *mode_int, *mode_uint;
 219
 220 static ir_node *expression_to_firm(const expression_t *expression);
 221 static inline ir_mode *get_ir_mode(type_t *type);
 222
 223 /**
 224  * Initialises the atomic modes depending on the machine size.
 225  */
 226 static void init_atomic_modes(void) {
 227         unsigned int_size   = machine_size < 32 ? 2 : 4;
 228         unsigned long_size  = machine_size < 64 ? 4 : 8;
 229         unsigned llong_size = machine_size < 32 ? 4 : 8;
 230
 231         /* firm has no real void... */
 232         _atomic_modes[ATOMIC_TYPE_VOID]        = mode_T;
 233         _atomic_modes[ATOMIC_TYPE_CHAR]        = char_is_signed ? get_smode(1) : get_umode(1);
 234         _atomic_modes[ATOMIC_TYPE_SCHAR]       = get_smode(1);
 235         _atomic_modes[ATOMIC_TYPE_UCHAR]       = get_umode(1);
 236         _atomic_modes[ATOMIC_TYPE_SHORT]       = get_smode(2);
 237         _atomic_modes[ATOMIC_TYPE_USHORT]      = get_umode(2);
 238         _atomic_modes[ATOMIC_TYPE_INT]         = get_smode(int_size);
 239         _atomic_modes[ATOMIC_TYPE_UINT]        = get_umode(int_size);
 240         _atomic_modes[ATOMIC_TYPE_LONG]        = get_smode(long_size);
 241         _atomic_modes[ATOMIC_TYPE_ULONG]       = get_umode(long_size);
 242         _atomic_modes[ATOMIC_TYPE_LONGLONG]    = get_smode(llong_size);
 243         _atomic_modes[ATOMIC_TYPE_ULONGLONG]   = get_umode(llong_size);
 244         _atomic_modes[ATOMIC_TYPE_FLOAT]       = mode_F;
 245         _atomic_modes[ATOMIC_TYPE_DOUBLE]      = mode_D;
 246         _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE] = mode_E;
 247         _atomic_modes[ATOMIC_TYPE_BOOL]        = get_umode(int_size);
 248
 249         _atomic_modes[ATOMIC_TYPE_BOOL]                  = _atomic_modes[ATOMIC_TYPE_INT];
 250         _atomic_modes[ATOMIC_TYPE_FLOAT_IMAGINARY]       = _atomic_modes[ATOMIC_TYPE_FLOAT];
 251         _atomic_modes[ATOMIC_TYPE_DOUBLE_IMAGINARY]      = _atomic_modes[ATOMIC_TYPE_DOUBLE];
 252         _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY] = _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE];
 253
 254         /* Hmm, pointers should be machine size */
 255         set_modeP_data(get_ptrmode(machine_size >> 3, NULL));
 256         set_modeP_code(get_ptrmode(machine_size >> 3, NULL));
 257
 258         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 259         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 260 }
 261
 262 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 263 {
 264         ir_mode *res = NULL;
 265         if ((unsigned)atomic_type->akind <= (unsigned)ATOMIC_TYPE_LAST)
 266                 res = _atomic_modes[(unsigned)atomic_type->akind];
 267         if (res == NULL)
 268                 panic("Encountered unknown atomic type");
 269         return res;
 270 }
 271
 272 static unsigned get_compound_type_size(compound_type_t *type)
 273 {
 274         ir_type *irtype = get_ir_type((type_t*) type);
 275         return get_type_size_bytes(irtype);
 276 }
 277
 278 static unsigned get_array_type_size(array_type_t *type)
 279 {
 280         assert(!type->is_vla);
 281         ir_type *irtype = get_ir_type((type_t*) type);
 282         return get_type_size_bytes(irtype);
 283 }
 284
 285
 286 static unsigned get_type_size_const(type_t *type)
 287 {
 288         type = skip_typeref(type);
 289
 290         switch(type->kind) {
 291         case TYPE_ERROR:
 292                 panic("error type occured");
 293         case TYPE_ATOMIC:
 294                 return get_atomic_type_size(type->atomic.akind);
 295         case TYPE_ENUM:
 296                 return get_mode_size_bytes(mode_int);
 297         case TYPE_COMPOUND_UNION:
 298         case TYPE_COMPOUND_STRUCT:
 299                 return get_compound_type_size(&type->compound);
 300         case TYPE_FUNCTION:
 301                 /* just a pointer to the function */
 302                 return get_mode_size_bytes(mode_P_code);
 303         case TYPE_POINTER:
 304                 return get_mode_size_bytes(mode_P_data);
 305         case TYPE_ARRAY:
 306                 return get_array_type_size(&type->array);
 307         case TYPE_BUILTIN:
 308                 return get_type_size_const(type->builtin.real_type);
 309         case TYPE_BITFIELD:
 310                 panic("type size of bitfield request");
 311         case TYPE_TYPEDEF:
 312         case TYPE_TYPEOF:
 313         case TYPE_INVALID:
 314                 break;
 315         }
 316         panic("Trying to determine size of invalid type");
 317 }
 318
 319 static ir_node *get_type_size(type_t *type)
 320 {
 321         type = skip_typeref(type);
 322
 323         if(is_type_array(type) && type->array.is_vla) {
 324                 ir_node *size_node = type->array.size_node;
 325                 if(size_node == NULL) {
 326                         size_node = expression_to_firm(type->array.size_expression);
 327                         assert(!is_Const(size_node));
 328                         type->array.size_node = size_node;
 329                 }
 330
 331                 ir_node *elem_size = get_type_size(type->array.element_type);
 332                 ir_mode *mode      = get_irn_mode(size_node);
 333                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 334                 return real_size;
 335         }
 336
 337         ir_mode *mode = get_ir_mode(type_size_t);
 338         symconst_symbol sym;
 339         sym.type_p = get_ir_type(type);
 340         return new_SymConst(mode, sym, symconst_type_size);
 341 }
 342
 343 static unsigned count_parameters(const function_type_t *function_type)
 344 {
 345         unsigned count = 0;
 346
 347         function_parameter_t *parameter = function_type->parameters;
 348         for ( ; parameter != NULL; parameter = parameter->next) {
 349                 ++count;
 350         }
 351
 352         return count;
 353 }
 354
 355
 356 static ir_type *create_atomic_type(const atomic_type_t *type)
 357 {
 358         dbg_info *dbgi  = get_dbg_info(&type->type.source_position);
 359         ir_mode *mode   = get_atomic_mode(type);
 360         ident   *id     = get_mode_ident(mode);
 361         ir_type *irtype = new_d_type_primitive(id, mode, dbgi);
 362
 363         /* TODO: this is x86 specific, we should fiddle this into
 364          * lang_features.h somehow... */
 365         if(type->akind == ATOMIC_TYPE_LONG_DOUBLE
 366                         || type->akind == ATOMIC_TYPE_DOUBLE
 367                         || type->akind == ATOMIC_TYPE_LONGLONG
 368                         || type->akind == ATOMIC_TYPE_ULONGLONG) {
 369                 set_type_alignment_bytes(irtype, 4);
 370         }
 371
 372         return irtype;
 373 }
 374
 375 static ir_type *create_method_type(const function_type_t *function_type)
 376 {
 377         type_t  *return_type  = function_type->return_type;
 378
 379         ident   *id           = unique_ident("functiontype");
 380         int      n_parameters = count_parameters(function_type);
 381         int      n_results    = return_type == type_void ? 0 : 1;
 382         dbg_info *dbgi        = get_dbg_info(&function_type->type.source_position);
 383         ir_type *irtype       = new_d_type_method(id, n_parameters, n_results, dbgi);
 384
 385         if(return_type != type_void) {
 386                 ir_type *restype = get_ir_type(return_type);
 387                 set_method_res_type(irtype, 0, restype);
 388         }
 389
 390         function_parameter_t *parameter = function_type->parameters;
 391         int                   n         = 0;
 392         for( ; parameter != NULL; parameter = parameter->next) {
 393                 ir_type *p_irtype = get_ir_type(parameter->type);
 394                 set_method_param_type(irtype, n, p_irtype);
 395                 ++n;
 396         }
 397
 398         if(function_type->variadic || function_type->unspecified_parameters) {
 399                 set_method_variadicity(irtype, variadicity_variadic);
 400         }
 401
 402         return irtype;
 403 }
 404
 405 static ir_type *create_pointer_type(pointer_type_t *type)
 406 {
 407         type_t  *points_to = type->points_to;
 408         ir_type *ir_points_to;
 409         /* Avoid endless recursion if the points_to type contains this poiner type
 410          * again (might be a struct). We therefore first create a void* pointer
 411          * and then set the real points_to type
 412          */
 413         dbg_info *dbgi   = get_dbg_info(&type->type.source_position);
 414         ir_type *ir_type = new_d_type_pointer(unique_ident("pointer"),
 415                                             ir_type_void, mode_P_data, dbgi);
 416         type->type.firm_type  = ir_type;
 417
 418         ir_points_to = get_ir_type(points_to);
 419         set_pointer_points_to_type(ir_type, ir_points_to);
 420
 421         return ir_type;
 422 }
 423
 424 static ir_type *create_array_type(array_type_t *type)
 425 {
 426         type_t  *element_type    = type->element_type;
 427         ir_type *ir_element_type = get_ir_type(element_type);
 428
 429         ident    *id      = unique_ident("array");
 430         dbg_info *dbgi    = get_dbg_info(&type->type.source_position);
 431         ir_type  *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
 432
 433         const int align = get_type_alignment_bytes(ir_element_type);
 434         set_type_alignment_bytes(ir_type, align);
 435
 436         if(type->size_constant) {
 437                 int n_elements = type->size;
 438
 439                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 440
 441                 size_t elemsize = get_type_size_bytes(ir_element_type);
 442                 if(elemsize % align > 0) {
 443                         elemsize += align - (elemsize % align);
 444                 }
 445                 set_type_size_bytes(ir_type, n_elements * elemsize);
 446         } else {
 447                 set_array_lower_bound_int(ir_type, 0, 0);
 448         }
 449         set_type_state(ir_type, layout_fixed);
 450
 451         return ir_type;
 452 }
 453
 454 /**
 455  * Return the signed integer type of size bits.
 456  *
 457  * @param size   the size
 458  */
 459 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 460                                                  unsigned size)
 461 {
 462         static ir_mode *s_modes[64 + 1] = {NULL, };
 463         ir_type *res;
 464         ir_mode *mode;
 465
 466         if (size <= 0 || size > 64)
 467                 return NULL;
 468
 469         mode = s_modes[size];
 470         if (mode == NULL) {
 471                 char name[32];
 472
 473                 snprintf(name, sizeof(name), "bf_I%u", size);
 474                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 475                                    size <= 32 ? 32 : size );
 476                 s_modes[size] = mode;
 477         }
 478
 479         char name[32];
 480         snprintf(name, sizeof(name), "I%u", size);
 481         ident *id = new_id_from_str(name);
 482         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 483         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 484         set_primitive_base_type(res, base_tp);
 485
 486         return res;
 487 }
 488
 489 /**
 490  * Return the unsigned integer type of size bits.
 491  *
 492  * @param size   the size
 493  */
 494 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 495                                                    unsigned size)
 496 {
 497         static ir_mode *u_modes[64 + 1] = {NULL, };
 498         ir_type *res;
 499         ir_mode *mode;
 500
 501         if (size <= 0 || size > 64)
 502                 return NULL;
 503
 504         mode = u_modes[size];
 505         if (mode == NULL) {
 506                 char name[32];
 507
 508                 snprintf(name, sizeof(name), "bf_U%u", size);
 509                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 510                                    size <= 32 ? 32 : size );
 511                 u_modes[size] = mode;
 512         }
 513
 514         char name[32];
 515
 516         snprintf(name, sizeof(name), "U%u", size);
 517         ident *id = new_id_from_str(name);
 518         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 519         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 520         set_primitive_base_type(res, base_tp);
 521
 522         return res;
 523 }
 524
 525 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 526 {
 527         type_t *base = skip_typeref(type->base);
 528         assert(base->kind == TYPE_ATOMIC);
 529         ir_type *irbase = get_ir_type(base);
 530
 531         unsigned size = fold_constant(type->size);
 532
 533         assert(!is_type_float(base));
 534         if(is_type_signed(base)) {
 535                 return get_signed_int_type_for_bit_size(irbase, size);
 536         } else {
 537                 return get_unsigned_int_type_for_bit_size(irbase, size);
 538         }
 539 }
 540
 541 #define INVALID_TYPE ((ir_type_ptr)-1)
 542
 543 static ir_type *create_union_type(compound_type_t *type, ir_type *irtype,
 544                                   size_t *outer_offset, size_t *outer_align);
 545
 546 static ir_type *create_struct_type(compound_type_t *type, ir_type *irtype,
 547                                    size_t *outer_offset, size_t *outer_align)
 548 {
 549         declaration_t *declaration = type->declaration;
 550         if(declaration->v.irtype != NULL) {
 551                 return declaration->v.irtype;
 552         }
 553
 554         size_t align_all  = 1;
 555         size_t offset     = 0;
 556         size_t bit_offset = 0;
 557         if(irtype == NULL) {
 558                 symbol_t *symbol = declaration->symbol;
 559                 ident    *id;
 560                 if(symbol != NULL) {
 561                         id = unique_ident(symbol->string);
 562                 } else {
 563                         id = unique_ident("__anonymous_struct");
 564                 }
 565                 dbg_info *dbgi  = get_dbg_info(&type->type.source_position);
 566
 567                 irtype = new_d_type_struct(id, dbgi);
 568
 569                 declaration->v.irtype = irtype;
 570                 type->type.firm_type  = irtype;
 571         } else {
 572                 offset    = *outer_offset;
 573                 align_all = *outer_align;
 574         }
 575
 576         declaration_t *entry = declaration->scope.declarations;
 577         for( ; entry != NULL; entry = entry->next) {
 578                 if(entry->namespc != NAMESPACE_NORMAL)
 579                         continue;
 580
 581                 symbol_t *symbol     = entry->symbol;
 582                 type_t   *entry_type = skip_typeref(entry->type);
 583                 dbg_info *dbgi       = get_dbg_info(&entry->source_position);
 584                 ident    *ident;
 585                 if(symbol != NULL) {
 586                         ident = new_id_from_str(symbol->string);
 587                 } else {
 588                         if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
 589                                 create_struct_type(&entry_type->compound, irtype, &offset,
 590                                                    &align_all);
 591                                 continue;
 592                         } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
 593                                 create_union_type(&entry_type->compound, irtype, &offset,
 594                                                   &align_all);
 595                                 continue;
 596                         } else {
 597                                 assert(entry_type->kind == TYPE_BITFIELD);
 598                         }
 599                         ident = unique_ident("anon");
 600                 }
 601
 602                 ir_type *base_irtype;
 603                 if(entry_type->kind == TYPE_BITFIELD) {
 604                         base_irtype = get_ir_type(entry_type->bitfield.base);
 605                 } else {
 606                         base_irtype = get_ir_type(entry_type);
 607                 }
 608
 609                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 610                 size_t misalign        = offset % entry_alignment;
 611
 612                 ir_type   *entry_irtype = get_ir_type(entry_type);
 613                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 614
 615                 size_t base;
 616                 size_t bits_remainder;
 617                 if(entry_type->kind == TYPE_BITFIELD) {
 618                         size_t size_bits      = fold_constant(entry_type->bitfield.size);
 619                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 620
 621                         if(size_bits > rest_size_bits) {
 622                                 /* start a new bucket */
 623                                 offset     += entry_alignment - misalign;
 624                                 bit_offset  = 0;
 625
 626                                 base           = offset;
 627                                 bits_remainder = 0;
 628                         } else {
 629                                 /* put into current bucket */
 630                                 base           = offset - misalign;
 631                                 bits_remainder = misalign * 8 + bit_offset;
 632                         }
 633
 634                         offset     += size_bits / 8;
 635                         bit_offset  = bit_offset + (size_bits % 8);
 636                 } else {
 637                         size_t entry_size = get_type_size_bytes(base_irtype);
 638                         if(misalign > 0 || bit_offset > 0)
 639                                 offset += entry_alignment - misalign;
 640
 641                         base           = offset;
 642                         bits_remainder = 0;
 643                         offset        += entry_size;
 644                         bit_offset     = 0;
 645                 }
 646
 647                 if(entry_alignment > align_all) {
 648                         if(entry_alignment % align_all != 0) {
 649                                 panic("uneven alignments not supported yet");
 650                         }
 651                         align_all = entry_alignment;
 652                 }
 653
 654                 set_entity_offset(entity, base);
 655                 set_entity_offset_bits_remainder(entity,
 656                                                  (unsigned char) bits_remainder);
 657                 //add_struct_member(irtype, entity);
 658                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 659                 assert(entry->v.entity == NULL);
 660                 entry->v.entity         = entity;
 661         }
 662
 663         size_t misalign = offset % align_all;
 664         if(misalign > 0 || bit_offset > 0) {
 665                 offset += align_all - misalign;
 666         }
 667
 668         if(outer_offset != NULL) {
 669                 *outer_offset = offset;
 670                 *outer_align  = align_all;
 671         } else {
 672                 set_type_alignment_bytes(irtype, align_all);
 673                 set_type_size_bytes(irtype, offset);
 674                 set_type_state(irtype, layout_fixed);
 675         }
 676
 677         return irtype;
 678 }
 679
 680 static ir_type *create_union_type(compound_type_t *type, ir_type *irtype,
 681                                   size_t *outer_offset, size_t *outer_align)
 682 {
 683         declaration_t *declaration = type->declaration;
 684         if(declaration->v.irtype != NULL) {
 685                 return declaration->v.irtype;
 686         }
 687
 688         size_t align_all = 1;
 689         size_t offset    = 0;
 690         size_t size      = 0;
 691
 692         if(irtype == NULL) {
 693                 symbol_t      *symbol      = declaration->symbol;
 694                 ident         *id;
 695                 if(symbol != NULL) {
 696                         id = unique_ident(symbol->string);
 697                 } else {
 698                         id = unique_ident("__anonymous_union");
 699                 }
 700                 dbg_info *dbgi = get_dbg_info(&type->type.source_position);
 701
 702                 irtype = new_d_type_union(id, dbgi);
 703
 704                 declaration->v.irtype = irtype;
 705                 type->type.firm_type  = irtype;
 706         } else {
 707                 offset    = *outer_offset;
 708                 align_all = *outer_align;
 709         }
 710
 711         type->type.firm_type = irtype;
 712
 713         declaration_t *entry = declaration->scope.declarations;
 714         for( ; entry != NULL; entry = entry->next) {
 715                 if(entry->namespc != NAMESPACE_NORMAL)
 716                         continue;
 717
 718                 symbol_t *symbol        = entry->symbol;
 719                 type_t   *entry_type    = skip_typeref(entry->type);
 720                 ir_type  *entry_ir_type = get_ir_type(entry_type);
 721
 722                 ident *ident;
 723                 if(symbol != NULL) {
 724                         ident = new_id_from_str(entry->symbol->string);
 725                 } else {
 726                         size_t offs = offset;
 727                         if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
 728                                 create_struct_type(&entry_type->compound, irtype, &offs,
 729                                                    &align_all);
 730                                 continue;
 731                         } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
 732                                 create_union_type(&entry_type->compound, irtype, &offs,
 733                                                   &align_all);
 734                                 continue;
 735                         } else {
 736                                 panic("anonymous union member must be struct or union");
 737                         }
 738                         size_t entry_size = offs - offset;
 739                         if(entry_size > size) {
 740                                 size = entry_size;
 741                         }
 742                         ident = unique_ident("anon");
 743                 }
 744
 745                 size_t entry_size      = get_type_size_bytes(entry_ir_type);
 746                 size_t entry_alignment = get_type_alignment_bytes(entry_ir_type);
 747
 748                 dbg_info  *const dbgi   = get_dbg_info(&entry->source_position);
 749                 ir_entity *const entity = new_d_entity(irtype, ident, entry_ir_type,
 750                                                        dbgi);
 751                 //add_union_member(irtype, entity);
 752                 set_entity_offset(entity, 0);
 753                 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
 754                 assert(entry->v.entity == NULL);
 755                 entry->v.entity         = entity;
 756
 757                 if(entry_size > size) {
 758                         size = entry_size;
 759                 }
 760                 if(entry_alignment > align_all) {
 761                         if(entry_alignment % align_all != 0) {
 762                                 panic("Uneven alignments not supported yet");
 763                         }
 764                         align_all = entry_alignment;
 765                 }
 766         }
 767
 768         if(outer_offset != NULL) {
 769                 assert(*outer_offset == offset);
 770
 771                 size_t misalign = offset % align_all;
 772                 if (misalign != 0)
 773                         size += align_all - misalign;
 774                 *outer_offset += size;
 775
 776                 if(align_all > *outer_align) {
 777                         if(align_all % *outer_align != 0) {
 778                                 panic("uneven alignments not supported yet");
 779                         }
 780                         *outer_align = align_all;
 781                 }
 782         } else {
 783                 set_type_alignment_bytes(irtype, align_all);
 784                 set_type_size_bytes(irtype, size);
 785                 set_type_state(irtype, layout_fixed);
 786                 declaration->v.irtype = irtype;
 787         }
 788
 789         return irtype;
 790 }
 791
 792 static ir_type *create_enum_type(enum_type_t *const type)
 793 {
 794         type->type.firm_type = ir_type_int;
 795
 796         ir_mode *const mode    = mode_int;
 797         tarval  *const one     = get_mode_one(mode);
 798         tarval  *      tv_next = get_tarval_null(mode);
 799
 800         declaration_t *declaration = type->declaration->next;
 801         for (; declaration != NULL; declaration = declaration->next) {
 802                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
 803                         break;
 804
 805                 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
 806
 807                 expression_t *const init = declaration->init.enum_value;
 808                 if (init != NULL) {
 809                         ir_node *const cnst = expression_to_firm(init);
 810                         if (!is_Const(cnst)) {
 811                                 panic("couldn't fold constant");
 812                         }
 813                         tv_next = get_Const_tarval(cnst);
 814                 }
 815                 declaration->v.enum_val = tv_next;
 816                 tv_next = tarval_add(tv_next, one);
 817         }
 818
 819         return ir_type_int;
 820 }
 821
 822 static ir_type *get_ir_type(type_t *type)
 823 {
 824         assert(type != NULL);
 825
 826         type = skip_typeref(type);
 827
 828         if(type->base.firm_type != NULL) {
 829                 assert(type->base.firm_type != INVALID_TYPE);
 830                 return type->base.firm_type;
 831         }
 832
 833         ir_type *firm_type = NULL;
 834         switch(type->kind) {
 835         case TYPE_ERROR:
 836                 panic("error type occured");
 837         case TYPE_ATOMIC:
 838                 firm_type = create_atomic_type(&type->atomic);
 839                 break;
 840         case TYPE_FUNCTION:
 841                 firm_type = create_method_type(&type->function);
 842                 break;
 843         case TYPE_POINTER:
 844                 firm_type = create_pointer_type(&type->pointer);
 845                 break;
 846         case TYPE_ARRAY:
 847                 firm_type = create_array_type(&type->array);
 848                 break;
 849         case TYPE_COMPOUND_STRUCT:
 850                 firm_type = create_struct_type(&type->compound, NULL, NULL, NULL);
 851                 break;
 852         case TYPE_COMPOUND_UNION:
 853                 firm_type = create_union_type(&type->compound, NULL, NULL, NULL);
 854                 break;
 855         case TYPE_ENUM:
 856                 firm_type = create_enum_type(&type->enumt);
 857                 break;
 858         case TYPE_BUILTIN:
 859                 firm_type = get_ir_type(type->builtin.real_type);
 860                 break;
 861         case TYPE_BITFIELD:
 862                 firm_type = create_bitfield_type(&type->bitfield);
 863                 break;
 864
 865         case TYPE_TYPEOF:
 866         case TYPE_TYPEDEF:
 867         case TYPE_INVALID:
 868                 break;
 869         }
 870         if(firm_type == NULL)
 871                 panic("unknown type found");
 872
 873         type->base.firm_type = firm_type;
 874         return firm_type;
 875 }
 876
 877 static inline ir_mode *get_ir_mode(type_t *type)
 878 {
 879         ir_type *irtype = get_ir_type(type);
 880
 881         /* firm doesn't report a mode for arrays somehow... */
 882         if(is_Array_type(irtype)) {
 883                 return mode_P_data;
 884         }
 885
 886         ir_mode *mode = get_type_mode(irtype);
 887         assert(mode != NULL);
 888         return mode;
 889 }
 890
 891 static ident *predef_idents[rts_max];
 892
 893 /** Names of the runtime functions. */
 894 static const struct {
 895         int        id;           /**< the rts id */
 896         int        n_res;        /**< number of return values */
 897         const char *name;        /**< the name of the rts function */
 898         int        n_params;     /**< number of parameters */
 899         unsigned   flags;        /**< language flags */
 900 } rts_data[] = {
 901         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 902         { rts_abort,      0, "abort",        0, _C89 },
 903         { rts_abs,        1, "abs",          1, _C89 },
 904         { rts_labs,       1, "labs",         1, _C89 },
 905         { rts_llabs,      1, "llabs",        1, _C99 },
 906         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 907
 908         { rts_fabs,       1, "fabs",         1, _C89 },
 909         { rts_sqrt,       1, "sqrt",         1, _C89 },
 910         { rts_cbrt,       1, "cbrt",         1, _C99 },
 911         { rts_exp,        1, "exp",          1, _C89 },
 912         { rts_exp2,       1, "exp2",         1, _C89 },
 913         { rts_exp10,      1, "exp10",        1, _GNUC },
 914         { rts_log,        1, "log",          1, _C89 },
 915         { rts_log2,       1, "log2",         1, _C89 },
 916         { rts_log10,      1, "log10",        1, _C89 },
 917         { rts_pow,        1, "pow",          2, _C89 },
 918         { rts_sin,        1, "sin",          1, _C89 },
 919         { rts_cos,        1, "cos",          1, _C89 },
 920         { rts_tan,        1, "tan",          1, _C89 },
 921         { rts_asin,       1, "asin",         1, _C89 },
 922         { rts_acos,       1, "acos",         1, _C89 },
 923         { rts_atan,       1, "atan",         1, _C89 },
 924         { rts_sinh,       1, "sinh",         1, _C89 },
 925         { rts_cosh,       1, "cosh",         1, _C89 },
 926         { rts_tanh,       1, "tanh",         1, _C89 },
 927
 928         { rts_fabsf,      1, "fabsf",        1, _C99 },
 929         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 930         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 931         { rts_expf,       1, "expf",         1, _C99 },
 932         { rts_exp2f,      1, "exp2f",        1, _C99 },
 933         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 934         { rts_logf,       1, "logf",         1, _C99 },
 935         { rts_log2f,      1, "log2f",        1, _C99 },
 936         { rts_log10f,     1, "log10f",       1, _C99 },
 937         { rts_powf,       1, "powf",         2, _C99 },
 938         { rts_sinf,       1, "sinf",         1, _C99 },
 939         { rts_cosf,       1, "cosf",         1, _C99 },
 940         { rts_tanf,       1, "tanf",         1, _C99 },
 941         { rts_asinf,      1, "asinf",        1, _C99 },
 942         { rts_acosf,      1, "acosf",        1, _C99 },
 943         { rts_atanf,      1, "atanf",        1, _C99 },
 944         { rts_sinhf,      1, "sinhf",        1, _C99 },
 945         { rts_coshf,      1, "coshf",        1, _C99 },
 946         { rts_tanhf,      1, "tanhf",        1, _C99 },
 947
 948         { rts_fabsl,      1, "fabsl",        1, _C99 },
 949         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 950         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 951         { rts_expl,       1, "expl",         1, _C99 },
 952         { rts_exp2l,      1, "exp2l",        1, _C99 },
 953         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 954         { rts_logl,       1, "logl",         1, _C99 },
 955         { rts_log2l,      1, "log2l",        1, _C99 },
 956         { rts_log10l,     1, "log10l",       1, _C99 },
 957         { rts_powl,       1, "powl",         2, _C99 },
 958         { rts_sinl,       1, "sinl",         1, _C99 },
 959         { rts_cosl,       1, "cosl",         1, _C99 },
 960         { rts_tanl,       1, "tanl",         1, _C99 },
 961         { rts_asinl,      1, "asinl",        1, _C99 },
 962         { rts_acosl,      1, "acosl",        1, _C99 },
 963         { rts_atanl,      1, "atanl",        1, _C99 },
 964         { rts_sinhl,      1, "sinhl",        1, _C99 },
 965         { rts_coshl,      1, "coshl",        1, _C99 },
 966         { rts_tanhl,      1, "tanhl",        1, _C99 },
 967
 968         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 969         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 970         { rts_strcmp,     1, "strcmp",       2, _C89 },
 971         { rts_strncmp,    1, "strncmp",      3, _C89 }
 972 };
 973
 974 static ir_entity* get_function_entity(declaration_t *declaration)
 975 {
 976         if(declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
 977                 return declaration->v.entity;
 978         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
 979
 980         symbol_t *symbol = declaration->symbol;
 981         ident    *id     = new_id_from_str(symbol->string);
 982
 983         ir_type  *global_type    = get_glob_type();
 984         ir_type  *ir_type_method = get_ir_type(declaration->type);
 985         assert(is_Method_type(ir_type_method));
 986
 987         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
 988         ir_entity *const entity = new_d_entity(global_type, id, ir_type_method, dbgi);
 989         set_entity_ld_ident(entity, id);
 990         if(declaration->storage_class == STORAGE_CLASS_STATIC
 991                         || declaration->is_inline) {
 992                 set_entity_visibility(entity, visibility_local);
 993         } else if(declaration->init.statement != NULL) {
 994                 set_entity_visibility(entity, visibility_external_visible);
 995         } else {
 996                 set_entity_visibility(entity, visibility_external_allocated);
 997
 998                 /* We should check for file scope here, but as long as we compile C only
 999                    this is not needed. */
1000                 int    n_params = get_method_n_params(ir_type_method);
1001                 int    n_res    = get_method_n_ress(ir_type_method);
1002                 int    i;
1003
1004                 if (n_params == 0 && n_res == 0 && id == predef_idents[rts_abort]) {
1005                         /* found abort(), store for later */
1006                         //abort_ent = ent;
1007                         //abort_tp  = ftype;
1008                 } else {
1009                         if (! firm_opt.freestanding) {
1010                                 /* check for a known runtime function */
1011                                 for (i = 0; i < rts_max; ++i) {
1012                                         /* ignore those rts functions not necessary needed for current mode */
1013                                         if ((c_mode & rts_data[i].flags) == 0)
1014                                                 continue;
1015                                         if (n_params == rts_data[i].n_params && n_res == rts_data[i].n_res &&
1016                                                 id == predef_idents[rts_data[i].id])
1017                                                 rts_entities[rts_data[i].id] = entity;
1018                                 }
1019                         }
1020                 }
1021         }
1022         set_entity_allocation(entity, allocation_static);
1023
1024         declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1025         declaration->v.entity         = entity;
1026
1027         return entity;
1028 }
1029
1030 static ir_node *const_to_firm(const const_expression_t *cnst)
1031 {
1032         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1033         ir_mode  *mode = get_ir_mode(cnst->base.type);
1034
1035         char    buf[128];
1036         tarval *tv;
1037         size_t  len;
1038         if(mode_is_float(mode)) {
1039                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1040         } else {
1041                 if(mode_is_signed(mode)) {
1042                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1043                 } else {
1044                         len = snprintf(buf, sizeof(buf), "%llu",
1045                                        (unsigned long long) cnst->v.int_value);
1046                 }
1047                 tv = new_tarval_from_str(buf, len, mode);
1048         }
1049
1050         return new_d_Const(dbgi, mode, tv);
1051 }
1052
1053 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1054 {
1055         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1056         ir_mode  *mode = get_ir_mode(cnst->base.type);
1057
1058         long long int v = 0;
1059         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1060                 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1061         }
1062         char    buf[128];
1063         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1064         tarval *tv = new_tarval_from_str(buf, len, mode);
1065
1066         return new_d_Const(dbgi, mode, tv);
1067 }
1068
1069 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1070 {
1071         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1072         ir_mode  *mode = get_ir_mode(cnst->base.type);
1073
1074         long long int v = cnst->v.wide_character.begin[0];
1075
1076         char    buf[128];
1077         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1078         tarval *tv = new_tarval_from_str(buf, len, mode);
1079
1080         return new_d_Const(dbgi, mode, tv);
1081 }
1082
1083 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1084                                 ir_entity *entity)
1085 {
1086         assert(entity != NULL);
1087         union symconst_symbol sym;
1088         sym.entity_p = entity;
1089         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1090 }
1091
1092 static ir_node *string_to_firm(const source_position_t *const src_pos,
1093                                const char *const id_prefix,
1094                                const string_t *const value)
1095 {
1096         ir_type  *const global_type = get_glob_type();
1097         dbg_info *const dbgi        = get_dbg_info(src_pos);
1098         ir_type  *const type        = new_d_type_array(unique_ident("strtype"), 1,
1099                                                        ir_type_const_char, dbgi);
1100
1101         ident     *const id     = unique_ident(id_prefix);
1102         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1103         set_entity_ld_ident(entity, id);
1104         set_entity_variability(entity, variability_constant);
1105         set_entity_allocation(entity, allocation_static);
1106
1107         ir_type *const elem_type = ir_type_const_char;
1108         ir_mode *const mode      = get_type_mode(elem_type);
1109
1110         const char* const string = value->begin;
1111         const size_t      slen   = value->size;
1112
1113         set_array_lower_bound_int(type, 0, 0);
1114         set_array_upper_bound_int(type, 0, slen);
1115         set_type_size_bytes(type, slen);
1116         set_type_state(type, layout_fixed);
1117
1118         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1119         for(size_t i = 0; i < slen; ++i) {
1120                 tvs[i] = new_tarval_from_long(string[i], mode);
1121         }
1122
1123         set_array_entity_values(entity, tvs, slen);
1124         free(tvs);
1125
1126         return create_symconst(dbgi, mode_P_data, entity);
1127 }
1128
1129 static ir_node *string_literal_to_firm(
1130                 const string_literal_expression_t* literal)
1131 {
1132         return string_to_firm(&literal->base.source_position, "Lstr",
1133                               &literal->value);
1134 }
1135
1136 static ir_node *wide_string_literal_to_firm(
1137         const wide_string_literal_expression_t* const literal)
1138 {
1139         ir_type *const global_type = get_glob_type();
1140         ir_type *const elem_type   = ir_type_wchar_t;
1141         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1142         ir_type *const type        = new_d_type_array(unique_ident("strtype"), 1,
1143                                                     elem_type, dbgi);
1144
1145         ident     *const id     = unique_ident("Lstr");
1146         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1147         set_entity_ld_ident(entity, id);
1148         set_entity_variability(entity, variability_constant);
1149         set_entity_allocation(entity, allocation_static);
1150
1151         ir_mode *const mode      = get_type_mode(elem_type);
1152
1153         const wchar_rep_t *const string = literal->value.begin;
1154         const size_t             slen   = literal->value.size;
1155
1156         set_array_lower_bound_int(type, 0, 0);
1157         set_array_upper_bound_int(type, 0, slen);
1158         set_type_size_bytes(type, slen);
1159         set_type_state(type, layout_fixed);
1160
1161         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1162         for(size_t i = 0; i < slen; ++i) {
1163                 tvs[i] = new_tarval_from_long(string[i], mode);
1164         }
1165
1166         set_array_entity_values(entity, tvs, slen);
1167         free(tvs);
1168
1169         return create_symconst(dbgi, mode_P_data, entity);
1170 }
1171
1172 static ir_node *deref_address(ir_type *const irtype, ir_node *const addr,
1173                               dbg_info *const dbgi)
1174 {
1175         if (is_compound_type(irtype) ||
1176                         is_Method_type(irtype)   ||
1177                         is_Array_type(irtype)) {
1178                 return addr;
1179         }
1180
1181         ir_mode *const mode     = get_type_mode(irtype);
1182         ir_node *const memory   = get_store();
1183         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1184         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1185         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1186         set_store(load_mem);
1187         return load_res;
1188 }
1189
1190 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1191 {
1192         ir_mode *mode = get_irn_mode(node);
1193
1194         if(!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1195                 return node;
1196         if(!mode_is_float(mode))
1197                 return node;
1198
1199         /* check if there is already a Conv */
1200         if (get_irn_op(node) == op_Conv) {
1201                 /* convert it into a strict Conv */
1202                 set_Conv_strict(node, 1);
1203                 return node;
1204         }
1205
1206         /* otherwise create a new one */
1207         return new_d_strictConv(dbgi, node, mode);
1208 }
1209
1210 static ir_node *get_global_var_address(dbg_info *const dbgi,
1211                                        const declaration_t *const decl)
1212 {
1213         assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1214
1215         ir_entity *const entity = decl->v.entity;
1216         switch ((storage_class_tag_t)decl->storage_class) {
1217                 case STORAGE_CLASS_THREAD:
1218                 case STORAGE_CLASS_THREAD_EXTERN:
1219                 case STORAGE_CLASS_THREAD_STATIC: {
1220                         ir_node *const no_mem = new_NoMem();
1221                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1222                         return new_d_simpleSel(dbgi, no_mem, tls, entity);
1223                 }
1224
1225                 default:
1226                         return create_symconst(dbgi, mode_P_data, entity);
1227         }
1228 }
1229
1230 /* Returns the correct base address depending on whether it is a parameter or a
1231  * normal local variable */
1232 static ir_node *get_local_frame(ir_entity *const ent)
1233 {
1234         ir_graph      *const irg   = current_ir_graph;
1235         const ir_type *const owner = get_entity_owner(ent);
1236         if (owner == get_irg_frame_type(irg)) {
1237                 return get_irg_frame(irg);
1238         } else {
1239                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1240                 return get_irg_value_param_base(irg);
1241         }
1242 }
1243
1244 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1245 {
1246         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1247         declaration_t *declaration = ref->declaration;
1248         type_t        *type        = skip_typeref(declaration->type);
1249
1250         switch((declaration_kind_t) declaration->declaration_kind) {
1251         case DECLARATION_KIND_UNKNOWN:
1252                 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
1253                         break;
1254                 }
1255                 get_ir_type(type);
1256                 /* FALLTHROUGH */
1257
1258         case DECLARATION_KIND_ENUM_ENTRY: {
1259                 ir_mode *const mode = get_ir_mode(type);
1260                 return new_Const(mode, declaration->v.enum_val);
1261         }
1262
1263         case DECLARATION_KIND_LOCAL_VARIABLE: {
1264                 ir_mode *const mode = get_ir_mode(type);
1265                 return get_value(declaration->v.value_number, mode);
1266         }
1267         case DECLARATION_KIND_FUNCTION: {
1268                 ir_mode *const mode = get_ir_mode(type);
1269                 return create_symconst(dbgi, mode, declaration->v.entity);
1270         }
1271         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1272                 ir_node *const addr   = get_global_var_address(dbgi, declaration);
1273                 ir_type *const irtype = get_entity_type(declaration->v.entity);
1274                 return deref_address(irtype, addr, dbgi);
1275         }
1276
1277         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1278                 ir_entity *entity = declaration->v.entity;
1279                 ir_node   *frame  = get_local_frame(entity);
1280                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1281                 ir_type   *irtype = get_entity_type(entity);
1282                 return deref_address(irtype, sel, dbgi);
1283         }
1284
1285         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1286                 return declaration->v.vla_base;
1287
1288         case DECLARATION_KIND_COMPOUND_MEMBER:
1289         case DECLARATION_KIND_LABEL_BLOCK:
1290                 panic("not implemented reference type");
1291         }
1292
1293         panic("reference to declaration with unknown type found");
1294 }
1295
1296 static ir_node *reference_addr(const reference_expression_t *ref)
1297 {
1298         dbg_info      *dbgi        = get_dbg_info(&ref->base.source_position);
1299         declaration_t *declaration = ref->declaration;
1300
1301         switch((declaration_kind_t) declaration->declaration_kind) {
1302         case DECLARATION_KIND_UNKNOWN:
1303                 break;
1304         case DECLARATION_KIND_LOCAL_VARIABLE:
1305                 panic("local variable without entity has no address");
1306         case DECLARATION_KIND_FUNCTION: {
1307                 type_t *const  type = skip_typeref(ref->base.type);
1308                 ir_mode *const mode = get_ir_mode(type);
1309                 return create_symconst(dbgi, mode, declaration->v.entity);
1310         }
1311         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1312                 ir_node *const addr = get_global_var_address(dbgi, declaration);
1313                 return addr;
1314         }
1315         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1316                 ir_entity *entity = declaration->v.entity;
1317                 ir_node   *frame  = get_local_frame(entity);
1318                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1319
1320                 return sel;
1321         }
1322
1323         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1324                 return declaration->v.vla_base;
1325
1326         case DECLARATION_KIND_ENUM_ENTRY:
1327                 panic("trying to reference enum entry");
1328
1329         case DECLARATION_KIND_COMPOUND_MEMBER:
1330         case DECLARATION_KIND_LABEL_BLOCK:
1331                 panic("not implemented reference type");
1332         }
1333
1334         panic("reference to declaration with unknown type found");
1335 }
1336
1337 static ir_node *process_builtin_call(const call_expression_t *call)
1338 {
1339         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1340
1341         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1342         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1343
1344         type_t *type = skip_typeref(builtin->base.type);
1345         assert(is_type_pointer(type));
1346
1347         type_t   *function_type = skip_typeref(type->pointer.points_to);
1348         symbol_t *symbol        = builtin->symbol;
1349
1350         switch(symbol->ID) {
1351         case T___builtin_alloca: {
1352                 if(call->arguments == NULL || call->arguments->next != NULL) {
1353                         panic("invalid number of parameters on __builtin_alloca");
1354                 }
1355                 expression_t *argument = call->arguments->expression;
1356                 ir_node      *size     = expression_to_firm(argument);
1357
1358                 ir_node *store  = get_store();
1359                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1360                                               stack_alloc);
1361                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1362                 set_store(proj_m);
1363                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1364
1365                 return res;
1366         }
1367         case T___builtin_nan:
1368         case T___builtin_nanf:
1369         case T___builtin_nand: {
1370                 /* Ignore string for now... */
1371                 assert(is_type_function(function_type));
1372                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1373                 tarval  *tv   = get_mode_NAN(mode);
1374                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1375                 return res;
1376         }
1377         case T___builtin_va_end:
1378                 return NULL;
1379         default:
1380                 panic("Unsupported builtin found\n");
1381         }
1382 }
1383
1384 static ir_node *call_expression_to_firm(const call_expression_t *call)
1385 {
1386         assert(get_cur_block() != NULL);
1387
1388         expression_t *function = call->function;
1389         if(function->kind == EXPR_BUILTIN_SYMBOL) {
1390                 return process_builtin_call(call);
1391         }
1392         ir_node *callee = expression_to_firm(function);
1393
1394         type_t *type = skip_typeref(function->base.type);
1395         assert(is_type_pointer(type));
1396         pointer_type_t *pointer_type = &type->pointer;
1397         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1398         assert(is_type_function(points_to));
1399         function_type_t *function_type = &points_to->function;
1400
1401         int              n_parameters = 0;
1402         call_argument_t *argument     = call->arguments;
1403         for( ; argument != NULL; argument = argument->next) {
1404                 ++n_parameters;
1405         }
1406
1407         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1408
1409         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1410         ir_type *new_method_type = NULL;
1411         if(function_type->variadic || function_type->unspecified_parameters) {
1412                 /* we need to construct a new method type matching the call
1413                  * arguments... */
1414                 int n_res       = get_method_n_ress(ir_method_type);
1415                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1416                 new_method_type = new_d_type_method(unique_ident("calltype"),
1417                                                   n_parameters, n_res, dbgi);
1418                 set_method_calling_convention(new_method_type,
1419                                get_method_calling_convention(ir_method_type));
1420                 set_method_additional_properties(new_method_type,
1421                                get_method_additional_properties(ir_method_type));
1422
1423                 for(int i = 0; i < n_res; ++i) {
1424                         set_method_res_type(new_method_type, i,
1425                                             get_method_res_type(ir_method_type, i));
1426                 }
1427         }
1428         ir_node *in[n_parameters];
1429
1430         argument = call->arguments;
1431         int n = 0;
1432         for( ; argument != NULL; argument = argument->next) {
1433                 expression_t *expression = argument->expression;
1434                 ir_node      *arg_node   = expression_to_firm(expression);
1435
1436                 arg_node = do_strict_conv(dbgi, arg_node);
1437
1438                 in[n] = arg_node;
1439                 if(new_method_type != NULL) {
1440                         ir_type *irtype = get_ir_type(expression->base.type);
1441                         set_method_param_type(new_method_type, n, irtype);
1442                 }
1443
1444                 n++;
1445         }
1446         assert(n == n_parameters);
1447
1448         if(new_method_type != NULL)
1449                 ir_method_type = new_method_type;
1450
1451         ir_node  *store = get_store();
1452         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1453                                      ir_method_type);
1454         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1455         set_store(mem);
1456
1457         type_t  *return_type = skip_typeref(function_type->return_type);
1458         ir_node *result      = NULL;
1459
1460         if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1461                 ir_mode *mode;
1462                 if(is_type_scalar(return_type)) {
1463                         mode = get_ir_mode(return_type);
1464                 } else {
1465                         mode = mode_P_data;
1466                 }
1467                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1468                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1469         }
1470
1471         return result;
1472 }
1473
1474 static void statement_to_firm(statement_t *statement);
1475 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1476
1477 static ir_node *expression_to_addr(const expression_t *expression);
1478 static void create_condition_evaluation(const expression_t *expression,
1479                                         ir_node *true_block,
1480                                         ir_node *false_block);
1481
1482 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1483                          ir_node *value)
1484 {
1485         value = do_strict_conv(dbgi, value);
1486
1487         ir_node *memory = get_store();
1488
1489         if(is_type_scalar(type)) {
1490                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1491                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1492                 set_store(store_mem);
1493         } else {
1494                 ir_type *irtype    = get_ir_type(type);
1495                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1496                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1497                 set_store(copyb_mem);
1498         }
1499 }
1500
1501 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1502 {
1503         tarval *all_one   = get_mode_all_one(mode);
1504         int     mode_size = get_mode_size_bits(mode);
1505
1506         assert(offset >= 0 && size >= 0);
1507         assert(offset + size <= mode_size);
1508         if(size == mode_size) {
1509                 return all_one;
1510         }
1511
1512         long    shiftr    = get_mode_size_bits(mode) - size;
1513         long    shiftl    = offset;
1514         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1515         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1516         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1517         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1518
1519         return mask1;
1520 }
1521
1522 static void bitfield_store_to_firm(const unary_expression_t *expression,
1523                                    ir_node *value)
1524 {
1525         expression_t *select = expression->value;
1526         assert(select->kind == EXPR_SELECT);
1527         type_t       *type   = select->base.type;
1528         assert(type->kind == TYPE_BITFIELD);
1529         ir_mode      *mode   = get_ir_mode(type->bitfield.base);
1530         ir_node      *addr   = expression_to_addr(select);
1531
1532         assert(get_irn_mode(value) == mode);
1533
1534         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1535
1536         /* kill upper bits of value and shift to right position */
1537         ir_entity *entity       = select->select.compound_entry->v.entity;
1538         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1539         ir_type   *entity_type  = get_entity_type(entity);
1540         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1541
1542         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1543         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1544         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1545         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1546         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1547         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1548
1549         /* load current value */
1550         ir_node  *mem             = get_store();
1551         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1552         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1553         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1554         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1555         tarval   *inv_mask        = tarval_not(shift_mask);
1556         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1557         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1558
1559         /* construct new value and store */
1560         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1561         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1562         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1563         set_store(store_mem);
1564 }
1565
1566 static void set_value_for_expression(const expression_t *expression,
1567                                      ir_node *value)
1568 {
1569         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1570         value          = do_strict_conv(dbgi, value);
1571
1572         if(expression->kind == EXPR_REFERENCE) {
1573                 const reference_expression_t *ref = &expression->reference;
1574
1575                 declaration_t *declaration = ref->declaration;
1576                 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1577                 if(declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1578                         set_value(declaration->v.value_number, value);
1579                         return;
1580                 }
1581         }
1582
1583         if(expression->kind == EXPR_UNARY_BITFIELD_EXTRACT) {
1584                 bitfield_store_to_firm(&expression->unary, value);
1585                 return;
1586         }
1587
1588         ir_node *addr = expression_to_addr(expression);
1589         type_t  *type = skip_typeref(expression->base.type);
1590         assign_value(dbgi, addr, type, value);
1591 }
1592
1593 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1594 {
1595         ir_mode *value_mode = get_irn_mode(value);
1596
1597         if (value_mode == dest_mode || is_Bad(value))
1598                 return value;
1599
1600         if(dest_mode == mode_b) {
1601                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1602                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1603                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1604                 return proj;
1605         }
1606
1607         return new_d_Conv(dbgi, value, dest_mode);
1608 }
1609
1610 static ir_node *create_incdec(const unary_expression_t *expression)
1611 {
1612         dbg_info     *dbgi  = get_dbg_info(&expression->base.source_position);
1613         type_t       *type  = skip_typeref(expression->base.type);
1614         ir_mode      *mode  = get_ir_mode(type);
1615         expression_t *value = expression->value;
1616
1617         ir_node *value_node = expression_to_firm(value);
1618
1619         ir_node *offset;
1620         if(is_type_pointer(type)) {
1621                 pointer_type_t *pointer_type = &type->pointer;
1622                 offset                       = get_type_size(pointer_type->points_to);
1623         } else {
1624                 assert(is_type_arithmetic(type));
1625                 offset = new_Const(mode, get_mode_one(mode));
1626         }
1627
1628         switch(expression->base.kind) {
1629         case EXPR_UNARY_POSTFIX_INCREMENT: {
1630                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1631                 set_value_for_expression(value, new_value);
1632                 return value_node;
1633         }
1634         case EXPR_UNARY_POSTFIX_DECREMENT: {
1635                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1636                 set_value_for_expression(value, new_value);
1637                 return value_node;
1638         }
1639         case EXPR_UNARY_PREFIX_INCREMENT: {
1640                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1641                 set_value_for_expression(value, new_value);
1642                 return new_value;
1643         }
1644         case EXPR_UNARY_PREFIX_DECREMENT: {
1645                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1646                 set_value_for_expression(value, new_value);
1647                 return new_value;
1648         }
1649         default:
1650                 panic("no incdec expr in create_incdec");
1651                 return NULL;
1652         }
1653 }
1654
1655 static bool is_local_variable(expression_t *expression)
1656 {
1657         if (expression->kind != EXPR_REFERENCE)
1658                 return false;
1659         reference_expression_t *ref_expr    = &expression->reference;
1660         declaration_t          *declaration = ref_expr->declaration;
1661         return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1662 }
1663
1664 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1665 {
1666         switch(kind) {
1667         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
1668         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1669         case EXPR_BINARY_NOTEQUAL:
1670                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1671         case EXPR_BINARY_ISLESS:
1672         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
1673         case EXPR_BINARY_ISLESSEQUAL:
1674         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
1675         case EXPR_BINARY_ISGREATER:
1676         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
1677         case EXPR_BINARY_ISGREATEREQUAL:
1678         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
1679         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
1680
1681         default:
1682                 break;
1683         }
1684         panic("trying to get pn_Cmp from non-comparison binexpr type");
1685 }
1686
1687 /**
1688  * Handle the assume optimizer hint: check if a Confirm
1689  * node can be created.
1690  *
1691  * @param dbi    debug info
1692  * @param expr   the IL assume expression
1693  *
1694  * we support here only some simple cases:
1695  *  - var rel const
1696  *  - const rel val
1697  *  - var rel var
1698  */
1699 static ir_node *handle_assume_compare(dbg_info *dbi,
1700                                       const binary_expression_t *expression)
1701 {
1702         expression_t  *op1 = expression->left;
1703         expression_t  *op2 = expression->right;
1704         declaration_t *var2, *var = NULL;
1705         ir_node       *res = NULL;
1706         pn_Cmp         cmp_val;
1707
1708         cmp_val = get_pnc(expression->base.kind, op1->base.type);
1709
1710         if (is_local_variable(op1) && is_local_variable(op2)) {
1711         var  = op1->reference.declaration;
1712             var2 = op2->reference.declaration;
1713
1714                 type_t  *const type = skip_typeref(var->type);
1715                 ir_mode *const mode = get_ir_mode(type);
1716
1717                 ir_node *const irn1 = get_value(var->v.value_number, mode);
1718                 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1719
1720                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1721                 set_value(var2->v.value_number, res);
1722
1723                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1724                 set_value(var->v.value_number, res);
1725
1726                 return res;
1727         }
1728
1729         expression_t *con;
1730         if (is_local_variable(op1) && is_constant_expression(op2)) {
1731                 var = op1->reference.declaration;
1732                 con = op2;
1733         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
1734                 cmp_val = get_inversed_pnc(cmp_val);
1735                 var = op2->reference.declaration;
1736                 con = op1;
1737         }
1738
1739         if (var != NULL) {
1740                 type_t  *const type = skip_typeref(var->type);
1741                 ir_mode *const mode = get_ir_mode(type);
1742
1743                 res = get_value(var->v.value_number, mode);
1744                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
1745                 set_value(var->v.value_number, res);
1746         }
1747         return res;
1748 }
1749
1750 /**
1751  * Handle the assume optimizer hint.
1752  *
1753  * @param dbi    debug info
1754  * @param expr   the IL assume expression
1755  */
1756 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
1757         switch(expression->kind) {
1758         case EXPR_BINARY_EQUAL:
1759         case EXPR_BINARY_NOTEQUAL:
1760         case EXPR_BINARY_LESS:
1761         case EXPR_BINARY_LESSEQUAL:
1762         case EXPR_BINARY_GREATER:
1763         case EXPR_BINARY_GREATEREQUAL:
1764                 return handle_assume_compare(dbi, &expression->binary);
1765         default:
1766                 return NULL;
1767         }
1768 }
1769
1770 static ir_node *bitfield_extract_to_firm(const unary_expression_t *expression)
1771 {
1772         expression_t *select = expression->value;
1773         assert(select->kind == EXPR_SELECT);
1774
1775         type_t   *type     = select->base.type;
1776         assert(type->kind == TYPE_BITFIELD);
1777         ir_mode  *mode     = get_ir_mode(type->bitfield.base);
1778         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1779         ir_node  *addr     = expression_to_addr(select);
1780         ir_node  *mem      = get_store();
1781         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1782         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1783         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1784
1785         load_res           = create_conv(dbgi, load_res, mode_int);
1786
1787         set_store(load_mem);
1788
1789         /* kill upper bits */
1790         ir_entity *entity       = select->select.compound_entry->v.entity;
1791         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1792         ir_type   *entity_type  = get_entity_type(entity);
1793         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1794         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1795         assert(shift_bitsl >= 0);
1796         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1797         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1798         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1799
1800         long       shift_bitsr  = bitoffset + shift_bitsl;
1801         assert(shift_bitsr <= (long) machine_size);
1802         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1803         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1804         ir_node   *shiftr;
1805         if(mode_is_signed(mode)) {
1806                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1807         } else {
1808                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1809         }
1810
1811         return create_conv(dbgi, shiftr, mode);
1812 }
1813
1814 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1815 {
1816         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1817         type_t   *type = skip_typeref(expression->base.type);
1818
1819         if(expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
1820                 return expression_to_addr(expression->value);
1821
1822         const expression_t *value = expression->value;
1823
1824         switch(expression->base.kind) {
1825         case EXPR_UNARY_NEGATE: {
1826                 ir_node *value_node = expression_to_firm(value);
1827                 ir_mode *mode = get_ir_mode(type);
1828                 return new_d_Minus(dbgi, value_node, mode);
1829         }
1830         case EXPR_UNARY_PLUS:
1831                 return expression_to_firm(value);
1832         case EXPR_UNARY_BITWISE_NEGATE: {
1833                 ir_node *value_node = expression_to_firm(value);
1834                 ir_mode *mode = get_ir_mode(type);
1835                 return new_d_Not(dbgi, value_node, mode);
1836         }
1837         case EXPR_UNARY_NOT: {
1838                 ir_node *value_node = expression_to_firm(value);
1839                 ir_mode *mode = get_ir_mode(type);
1840                 if(get_irn_mode(value_node) != mode_b) {
1841                         value_node = create_conv(dbgi, value_node, mode_b);
1842                 }
1843                 value_node = new_d_Not(dbgi, value_node, mode_b);
1844                 if(mode != mode_b) {
1845                         value_node = create_conv(dbgi, value_node, mode);
1846                 }
1847                 return value_node;
1848         }
1849         case EXPR_UNARY_DEREFERENCE: {
1850                 ir_node *value_node = expression_to_firm(value);
1851                 type_t  *value_type = skip_typeref(value->base.type);
1852                 ir_type *irtype     = get_ir_type(value_type);
1853                 assert(is_Pointer_type(irtype));
1854                 ir_type *points_to  = get_pointer_points_to_type(irtype);
1855                 return deref_address(points_to, value_node, dbgi);
1856         }
1857         case EXPR_UNARY_POSTFIX_INCREMENT:
1858         case EXPR_UNARY_POSTFIX_DECREMENT:
1859         case EXPR_UNARY_PREFIX_INCREMENT:
1860         case EXPR_UNARY_PREFIX_DECREMENT:
1861                 return create_incdec(expression);
1862         case EXPR_UNARY_CAST: {
1863                 ir_node *value_node = expression_to_firm(value);
1864                 if(is_type_scalar(type)) {
1865                         ir_mode *mode = get_ir_mode(type);
1866                         ir_node *node = create_conv(dbgi, value_node, mode);
1867                         node = do_strict_conv(dbgi, node);
1868                         return node;
1869                 } else {
1870                         /* make sure firm type is constructed */
1871                         (void) get_ir_type(type);
1872                         return value_node;
1873                 }
1874         }
1875         case EXPR_UNARY_CAST_IMPLICIT: {
1876                 ir_node *value_node = expression_to_firm(value);
1877                 if(is_type_scalar(type)) {
1878                         ir_mode *mode = get_ir_mode(type);
1879                         return create_conv(dbgi, value_node, mode);
1880                 } else {
1881                         return value_node;
1882                 }
1883         }
1884         case EXPR_UNARY_ASSUME:
1885                 if(firm_opt.confirm)
1886                         return handle_assume(dbgi, value);
1887                 else
1888                         return NULL;
1889         case EXPR_UNARY_BITFIELD_EXTRACT:
1890                 return bitfield_extract_to_firm(expression);
1891
1892         default:
1893                 break;
1894         }
1895         panic("invalid UNEXPR type found");
1896 }
1897
1898 static ir_node *produce_condition_result(const expression_t *expression,
1899                                          dbg_info *dbgi)
1900 {
1901         ir_mode *mode      = get_ir_mode(expression->base.type);
1902         ir_node *cur_block = get_cur_block();
1903
1904         ir_node *one_block = new_immBlock();
1905         ir_node *one       = new_Const(mode, get_mode_one(mode));
1906         ir_node *jmp_one   = new_d_Jmp(dbgi);
1907
1908         ir_node *zero_block = new_immBlock();
1909         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1910         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1911
1912         set_cur_block(cur_block);
1913         create_condition_evaluation(expression, one_block, zero_block);
1914         mature_immBlock(one_block);
1915         mature_immBlock(zero_block);
1916
1917         ir_node *common_block = new_immBlock();
1918         add_immBlock_pred(common_block, jmp_one);
1919         add_immBlock_pred(common_block, jmp_zero);
1920         mature_immBlock(common_block);
1921
1922         ir_node *in[2] = { one, zero };
1923         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1924
1925         return val;
1926 }
1927
1928 static ir_node *create_lazy_op(const binary_expression_t *expression)
1929 {
1930         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1931         type_t   *type = expression->base.type;
1932         ir_mode  *mode = get_ir_mode(type);
1933
1934         if(is_constant_expression(expression->left)) {
1935                 long val = fold_constant(expression->left);
1936                 expression_kind_t ekind = expression->base.kind;
1937                 if((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
1938                                 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
1939                         return expression_to_firm(expression->right);
1940                 } else {
1941                         assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
1942                                         || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
1943                         return new_Const(mode, get_mode_one(mode));
1944                 }
1945         }
1946
1947         return produce_condition_result((const expression_t*) expression, dbgi);
1948 }
1949
1950 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1951                                             ir_node *right, ir_mode *mode);
1952
1953 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1954                                         create_arithmetic_func func)
1955 {
1956         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
1957         ir_node  *left  = expression_to_firm(expression->left);
1958         ir_node  *right = expression_to_firm(expression->right);
1959         type_t   *type  = expression->right->base.type;
1960         /* be careful with the modes, because in arithmetic assign nodes only
1961          * the right operand has the mode of the arithmetic already */
1962         ir_mode  *mode  = get_ir_mode(type);
1963         left            = create_conv(dbgi, left, mode);
1964         ir_node  *res   = func(dbgi, left, right, mode);
1965
1966         return res;
1967 }
1968
1969 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1970                                    ir_node  *      integer,
1971                                    type_t   *const type,
1972                                    dbg_info *const dbgi,
1973                                    const create_arithmetic_func func)
1974 {
1975         pointer_type_t *const pointer_type = &type->pointer;
1976         type_t         *const points_to    = pointer_type->points_to;
1977         const unsigned        elem_size    = get_type_size_const(points_to);
1978
1979         assert(elem_size >= 1);
1980         if (elem_size > 1) {
1981                 integer             = create_conv(dbgi, integer, mode_int);
1982                 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
1983                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_int);
1984                 integer = mul;
1985         }
1986
1987         ir_mode *const mode = get_ir_mode(type);
1988         return func(dbgi, pointer, integer, mode);
1989 }
1990
1991 static ir_node *create_arithmetic_assign_binop(
1992                 const binary_expression_t *expression, create_arithmetic_func func)
1993 {
1994         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
1995         type_t   *const type = skip_typeref(expression->base.type);
1996         ir_node  *value;
1997
1998         if (is_type_pointer(type)) {
1999                 ir_node *const pointer = expression_to_firm(expression->left);
2000                 ir_node *      integer = expression_to_firm(expression->right);
2001                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
2002         } else {
2003                 value = create_arithmetic_binop(expression, func);
2004         }
2005
2006         ir_mode *const mode = get_ir_mode(type);
2007         value = create_conv(dbgi, value, mode);
2008         set_value_for_expression(expression->left, value);
2009
2010         return value;
2011 }
2012
2013 static ir_node *create_add(const binary_expression_t *expression)
2014 {
2015         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2016         ir_node  *left  = expression_to_firm(expression->left);
2017         ir_node  *right = expression_to_firm(expression->right);
2018         type_t   *type  = expression->base.type;
2019
2020         expression_t *expr_left  = expression->left;
2021         expression_t *expr_right = expression->right;
2022         type_t       *type_left  = skip_typeref(expr_left->base.type);
2023         type_t       *type_right = skip_typeref(expr_right->base.type);
2024
2025         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2026                 ir_mode *const mode = get_ir_mode(type);
2027                 return new_d_Add(dbgi, left, right, mode);
2028         }
2029
2030         if (is_type_pointer(type_left)) {
2031                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
2032         } else {
2033                 assert(is_type_pointer(type_right));
2034                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
2035         }
2036 }
2037
2038 static ir_node *create_sub(const binary_expression_t *expression)
2039 {
2040         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2041         expression_t *const expr_left  = expression->left;
2042         expression_t *const expr_right = expression->right;
2043         ir_node      *const left       = expression_to_firm(expr_left);
2044         ir_node      *const right      = expression_to_firm(expr_right);
2045         type_t       *const type       = expression->base.type;
2046         type_t       *const type_left  = skip_typeref(expr_left->base.type);
2047         type_t       *const type_right = skip_typeref(expr_right->base.type);
2048
2049         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2050                 ir_mode *const mode = get_ir_mode(type);
2051                 return new_d_Sub(dbgi, left, right, mode);
2052         } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2053                 const pointer_type_t *const ptr_type = &type_left->pointer;
2054
2055                 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2056                 ir_mode *const mode      = get_ir_mode(type);
2057                 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2058                 ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2059                 ir_node *const no_mem    = new_NoMem();
2060                 ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size, mode,
2061                                                        op_pin_state_floats);
2062                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2063         }
2064
2065         assert(is_type_pointer(type_left));
2066         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
2067 }
2068
2069 static ir_node *create_shift(const binary_expression_t *expression)
2070 {
2071         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2072         ir_node  *left  = expression_to_firm(expression->left);
2073         ir_node  *right = expression_to_firm(expression->right);
2074         type_t   *type  = expression->base.type;
2075         ir_mode  *mode  = get_ir_mode(type);
2076
2077         /* firm always wants the shift count to be unsigned */
2078         right = create_conv(dbgi, right, mode_uint);
2079
2080         ir_node *res;
2081
2082         switch(expression->base.kind) {
2083         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2084         case EXPR_BINARY_SHIFTLEFT:
2085                 res = new_d_Shl(dbgi, left, right, mode);
2086                 break;
2087         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2088         case EXPR_BINARY_SHIFTRIGHT: {
2089                  expression_t *expr_left = expression->left;
2090                  type_t       *type_left = skip_typeref(expr_left->base.type);
2091
2092                  if(is_type_signed(type_left)) {
2093                         res = new_d_Shrs(dbgi, left, right, mode);
2094                  } else {
2095                          res = new_d_Shr(dbgi, left, right, mode);
2096                  }
2097                  break;
2098         }
2099         default:
2100                 panic("create shift op called for non-shift op");
2101         }
2102
2103         return res;
2104 }
2105
2106
2107 static ir_node *create_divmod(const binary_expression_t *expression)
2108 {
2109         dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2110         ir_node  *left  = expression_to_firm(expression->left);
2111         ir_node  *right = expression_to_firm(expression->right);
2112         ir_node  *pin   = new_Pin(new_NoMem());
2113         /* be careful with the modes, because in arithmetic assign nodes only
2114          * the right operand has the mode of the arithmetic already */
2115         type_t   *type  = expression->right->base.type;
2116         ir_mode  *mode  = get_ir_mode(type);
2117         left            = create_conv(dbgi, left, mode);
2118         ir_node  *op;
2119         ir_node  *res;
2120
2121         switch (expression->base.kind) {
2122         case EXPR_BINARY_DIV:
2123         case EXPR_BINARY_DIV_ASSIGN:
2124                 if(mode_is_float(mode)) {
2125                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2126                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2127                 } else {
2128                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2129                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2130                 }
2131                 break;
2132
2133         case EXPR_BINARY_MOD:
2134         case EXPR_BINARY_MOD_ASSIGN:
2135                 assert(!mode_is_float(mode));
2136                 op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
2137                 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2138                 break;
2139
2140         default: panic("unexpected binary expression type in create_divmod()");
2141         }
2142
2143         return res;
2144 }
2145
2146 static ir_node *create_arithmetic_assign_divmod(
2147                 const binary_expression_t *expression)
2148 {
2149         ir_node  *      value = create_divmod(expression);
2150         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2151         type_t   *const type  = expression->base.type;
2152         ir_mode  *const mode  = get_ir_mode(type);
2153
2154         assert(type->kind != TYPE_POINTER);
2155
2156         value = create_conv(dbgi, value, mode);
2157         set_value_for_expression(expression->left, value);
2158
2159         return value;
2160 }
2161
2162 static ir_node *create_arithmetic_assign_shift(
2163                 const binary_expression_t *expression)
2164 {
2165         ir_node  *      value = create_shift(expression);
2166         dbg_info *const dbgi  = get_dbg_info(&expression->base.source_position);
2167         type_t   *const type  = expression->base.type;
2168         ir_mode  *const mode  = get_ir_mode(type);
2169
2170         value = create_conv(dbgi, value, mode);
2171         set_value_for_expression(expression->left, value);
2172
2173         return value;
2174 }
2175
2176 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2177 {
2178         expression_kind_t kind = expression->base.kind;
2179
2180         switch(kind) {
2181         case EXPR_BINARY_EQUAL:
2182         case EXPR_BINARY_NOTEQUAL:
2183         case EXPR_BINARY_LESS:
2184         case EXPR_BINARY_LESSEQUAL:
2185         case EXPR_BINARY_GREATER:
2186         case EXPR_BINARY_GREATEREQUAL:
2187         case EXPR_BINARY_ISGREATER:
2188         case EXPR_BINARY_ISGREATEREQUAL:
2189         case EXPR_BINARY_ISLESS:
2190         case EXPR_BINARY_ISLESSEQUAL:
2191         case EXPR_BINARY_ISLESSGREATER:
2192         case EXPR_BINARY_ISUNORDERED: {
2193                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2194                 ir_node *left  = expression_to_firm(expression->left);
2195                 ir_node *right = expression_to_firm(expression->right);
2196                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2197                 long     pnc   = get_pnc(kind, expression->left->base.type);
2198                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2199                 return proj;
2200         }
2201         case EXPR_BINARY_ASSIGN: {
2202                 ir_node *right = expression_to_firm(expression->right);
2203                 set_value_for_expression(expression->left, right);
2204
2205                 return right;
2206         }
2207         case EXPR_BINARY_ADD:
2208                 return create_add(expression);
2209         case EXPR_BINARY_SUB:
2210                 return create_sub(expression);
2211         case EXPR_BINARY_MUL:
2212                 return create_arithmetic_binop(expression, new_d_Mul);
2213         case EXPR_BINARY_BITWISE_AND:
2214                 return create_arithmetic_binop(expression, new_d_And);
2215         case EXPR_BINARY_BITWISE_OR:
2216                 return create_arithmetic_binop(expression, new_d_Or);
2217         case EXPR_BINARY_BITWISE_XOR:
2218                 return create_arithmetic_binop(expression, new_d_Eor);
2219         case EXPR_BINARY_SHIFTLEFT:
2220         case EXPR_BINARY_SHIFTRIGHT:
2221                 return create_shift(expression);
2222         case EXPR_BINARY_DIV:
2223         case EXPR_BINARY_MOD:
2224                 return create_divmod(expression);
2225         case EXPR_BINARY_LOGICAL_AND:
2226         case EXPR_BINARY_LOGICAL_OR:
2227                 return create_lazy_op(expression);
2228         case EXPR_BINARY_COMMA:
2229                 expression_to_firm(expression->left);
2230                 return expression_to_firm(expression->right);
2231         case EXPR_BINARY_ADD_ASSIGN:
2232                 return create_arithmetic_assign_binop(expression, new_d_Add);
2233         case EXPR_BINARY_SUB_ASSIGN:
2234                 return create_arithmetic_assign_binop(expression, new_d_Sub);
2235         case EXPR_BINARY_MUL_ASSIGN:
2236                 return create_arithmetic_assign_binop(expression, new_d_Mul);
2237         case EXPR_BINARY_MOD_ASSIGN:
2238         case EXPR_BINARY_DIV_ASSIGN:
2239                 return create_arithmetic_assign_divmod(expression);
2240         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2241                 return create_arithmetic_assign_binop(expression, new_d_And);
2242         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2243                 return create_arithmetic_assign_binop(expression, new_d_Or);
2244         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2245                 return create_arithmetic_assign_binop(expression, new_d_Eor);
2246         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2247         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2248                 return create_arithmetic_assign_shift(expression);
2249         case EXPR_BINARY_BUILTIN_EXPECT:
2250                 return expression_to_firm(expression->left);
2251         default:
2252                 panic("TODO binexpr type");
2253         }
2254 }
2255
2256 static ir_node *array_access_addr(const array_access_expression_t *expression)
2257 {
2258         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2259         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2260         ir_node  *offset    = expression_to_firm(expression->index);
2261         offset              = create_conv(dbgi, offset, mode_uint);
2262
2263         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2264         assert(is_type_pointer(ref_type));
2265         pointer_type_t *pointer_type = &ref_type->pointer;
2266
2267         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2268         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2269                                              mode_uint);
2270         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2271
2272         return result;
2273 }
2274
2275 static ir_node *array_access_to_firm(
2276                 const array_access_expression_t *expression)
2277 {
2278         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2279         ir_node  *addr   = array_access_addr(expression);
2280         type_t   *type   = revert_automatic_type_conversion(
2281                         (const expression_t*) expression);
2282         type             = skip_typeref(type);
2283         ir_type  *irtype = get_ir_type(type);
2284
2285         return deref_address(irtype, addr, dbgi);
2286 }
2287
2288 static long get_offsetof_offset(const offsetof_expression_t *expression)
2289 {
2290         type_t *orig_type = expression->type;
2291         long    offset    = 0;
2292
2293         designator_t *designator = expression->designator;
2294         for( ; designator != NULL; designator = designator->next) {
2295                 type_t *type = skip_typeref(orig_type);
2296                 /* be sure the type is constructed */
2297                 (void) get_ir_type(type);
2298
2299                 if(designator->symbol != NULL) {
2300                         assert(is_type_compound(type));
2301                         symbol_t *symbol = designator->symbol;
2302
2303                         declaration_t *declaration = type->compound.declaration;
2304                         declaration_t *iter        = declaration->scope.declarations;
2305                         for( ; iter != NULL; iter = iter->next) {
2306                                 if(iter->symbol == symbol) {
2307                                         break;
2308                                 }
2309                         }
2310                         assert(iter != NULL);
2311
2312                         assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2313                         offset += get_entity_offset(iter->v.entity);
2314
2315                         orig_type = iter->type;
2316                 } else {
2317                         expression_t *array_index = designator->array_index;
2318                         assert(designator->array_index != NULL);
2319                         assert(is_type_array(type));
2320                         assert(is_type_valid(array_index->base.type));
2321
2322                         long index         = fold_constant(array_index);
2323                         ir_type *arr_type  = get_ir_type(type);
2324                         ir_type *elem_type = get_array_element_type(arr_type);
2325                         long     elem_size = get_type_size_bytes(elem_type);
2326
2327                         offset += index * elem_size;
2328
2329                         orig_type = type->array.element_type;
2330                 }
2331         }
2332
2333         return offset;
2334 }
2335
2336 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2337 {
2338         ir_mode  *mode   = get_ir_mode(expression->base.type);
2339         long      offset = get_offsetof_offset(expression);
2340         tarval   *tv     = new_tarval_from_long(offset, mode);
2341         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2342
2343         return new_d_Const(dbgi, mode, tv);
2344 }
2345
2346 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2347                                      ir_entity *entity, type_t *type);
2348
2349 static ir_node *compound_literal_to_firm(
2350                 const compound_literal_expression_t *expression)
2351 {
2352         type_t *type = expression->type;
2353
2354         /* create an entity on the stack */
2355         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2356
2357         ident     *const id     = unique_ident("CompLit");
2358         ir_type   *const irtype = get_ir_type(type);
2359         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2360         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2361         set_entity_ld_ident(entity, id);
2362
2363         set_entity_variability(entity, variability_uninitialized);
2364
2365         /* create initialisation code */
2366         initializer_t *initializer = expression->initializer;
2367         create_local_initializer(initializer, dbgi, entity, type);
2368
2369         /* create a sel for the compound literal address */
2370         ir_node *frame = get_local_frame(entity);
2371         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2372         return sel;
2373 }
2374
2375 /**
2376  * Transform a sizeof expression into Firm code.
2377  */
2378 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2379 {
2380         type_t *type = expression->type;
2381         if(type == NULL) {
2382                 type = expression->tp_expression->base.type;
2383                 assert(type != NULL);
2384         }
2385
2386         type = skip_typeref(type);
2387         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2388         if(is_type_array(type) && type->array.is_vla
2389                         && expression->tp_expression != NULL) {
2390                 expression_to_firm(expression->tp_expression);
2391         }
2392
2393         return get_type_size(type);
2394 }
2395
2396 /**
2397  * Transform an alignof expression into Firm code.
2398  */
2399 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2400 {
2401         type_t *type = expression->type;
2402         if(type == NULL) {
2403                 /* beware: if expression is a variable reference, return the
2404                    alignment of the variable. */
2405                 const expression_t *tp_expression = expression->tp_expression;
2406                 const declaration_t *declaration = expr_is_variable(tp_expression);
2407                 if (declaration != NULL) {
2408                         /* TODO: get the alignment of this variable. */
2409                 }
2410                 type = tp_expression->base.type;
2411                 assert(type != NULL);
2412         }
2413
2414         ir_mode *const mode = get_ir_mode(expression->base.type);
2415         symconst_symbol sym;
2416         sym.type_p = get_ir_type(type);
2417         return new_SymConst(mode, sym, symconst_type_align);
2418 }
2419
2420 static void init_ir_types(void);
2421 long fold_constant(const expression_t *expression)
2422 {
2423         init_ir_types();
2424
2425         assert(is_constant_expression(expression));
2426
2427         ir_graph *old_current_ir_graph = current_ir_graph;
2428         if(current_ir_graph == NULL) {
2429                 current_ir_graph = get_const_code_irg();
2430         }
2431
2432         ir_node *cnst = expression_to_firm(expression);
2433         current_ir_graph = old_current_ir_graph;
2434
2435         if(!is_Const(cnst)) {
2436                 panic("couldn't fold constant\n");
2437         }
2438
2439         tarval *tv = get_Const_tarval(cnst);
2440         if(!tarval_is_long(tv)) {
2441                 panic("result of constant folding is not integer\n");
2442         }
2443
2444         return get_tarval_long(tv);
2445 }
2446
2447 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2448 {
2449         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2450
2451         /* first try to fold a constant condition */
2452         if(is_constant_expression(expression->condition)) {
2453                 long val = fold_constant(expression->condition);
2454                 if(val) {
2455                         return expression_to_firm(expression->true_expression);
2456                 } else {
2457                         return expression_to_firm(expression->false_expression);
2458                 }
2459         }
2460
2461         ir_node *cur_block   = get_cur_block();
2462
2463         /* create the true block */
2464         ir_node *true_block  = new_immBlock();
2465
2466         ir_node *true_val = expression_to_firm(expression->true_expression);
2467         ir_node *true_jmp = new_Jmp();
2468
2469         /* create the false block */
2470         ir_node *false_block = new_immBlock();
2471
2472         ir_node *false_val = expression_to_firm(expression->false_expression);
2473         ir_node *false_jmp = new_Jmp();
2474
2475         /* create the condition evaluation */
2476         set_cur_block(cur_block);
2477         create_condition_evaluation(expression->condition, true_block, false_block);
2478         mature_immBlock(true_block);
2479         mature_immBlock(false_block);
2480
2481         /* create the common block */
2482         ir_node *common_block = new_immBlock();
2483         add_immBlock_pred(common_block, true_jmp);
2484         add_immBlock_pred(common_block, false_jmp);
2485         mature_immBlock(common_block);
2486
2487         /* TODO improve static semantics, so either both or no values are NULL */
2488         if (true_val == NULL || false_val == NULL)
2489                 return NULL;
2490
2491         ir_node *in[2] = { true_val, false_val };
2492         ir_mode *mode  = get_irn_mode(true_val);
2493         assert(get_irn_mode(false_val) == mode);
2494         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2495
2496         return val;
2497 }
2498
2499 static ir_node *select_addr(const select_expression_t *expression)
2500 {
2501         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2502
2503         ir_node *compound_addr = expression_to_firm(expression->compound);
2504
2505         declaration_t *entry = expression->compound_entry;
2506         assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2507         ir_entity     *entity = entry->v.entity;
2508
2509         assert(entity != NULL);
2510
2511         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2512
2513         return sel;
2514 }
2515
2516 static ir_node *select_to_firm(const select_expression_t *expression)
2517 {
2518         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2519         ir_node  *addr   = select_addr(expression);
2520         type_t   *type   = revert_automatic_type_conversion(
2521                         (const expression_t*) expression);
2522         type             = skip_typeref(type);
2523         ir_type  *irtype = get_ir_type(type);
2524
2525         return deref_address(irtype, addr, dbgi);
2526 }
2527
2528 /* Values returned by __builtin_classify_type. */
2529 typedef enum gcc_type_class
2530 {
2531         no_type_class = -1,
2532         void_type_class,
2533         integer_type_class,
2534         char_type_class,
2535         enumeral_type_class,
2536         boolean_type_class,
2537         pointer_type_class,
2538         reference_type_class,
2539         offset_type_class,
2540         real_type_class,
2541         complex_type_class,
2542         function_type_class,
2543         method_type_class,
2544         record_type_class,
2545         union_type_class,
2546         array_type_class,
2547         string_type_class,
2548         set_type_class,
2549         file_type_class,
2550         lang_type_class
2551 } gcc_type_class;
2552
2553 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2554 {
2555         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2556
2557         gcc_type_class tc;
2558         switch (type->kind)
2559         {
2560                 case TYPE_ATOMIC: {
2561                         const atomic_type_t *const atomic_type = &type->atomic;
2562                         switch ((atomic_type_kind_t) atomic_type->akind) {
2563                                 /* should not be reached */
2564                                 case ATOMIC_TYPE_INVALID:
2565                                         tc = no_type_class;
2566                                         goto make_const;
2567
2568                                 /* gcc cannot do that */
2569                                 case ATOMIC_TYPE_VOID:
2570                                         tc = void_type_class;
2571                                         goto make_const;
2572
2573                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2574                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2575                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2576                                 case ATOMIC_TYPE_SHORT:
2577                                 case ATOMIC_TYPE_USHORT:
2578                                 case ATOMIC_TYPE_INT:
2579                                 case ATOMIC_TYPE_UINT:
2580                                 case ATOMIC_TYPE_LONG:
2581                                 case ATOMIC_TYPE_ULONG:
2582                                 case ATOMIC_TYPE_LONGLONG:
2583                                 case ATOMIC_TYPE_ULONGLONG:
2584                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2585                                         tc = integer_type_class;
2586                                         goto make_const;
2587
2588                                 case ATOMIC_TYPE_FLOAT:
2589                                 case ATOMIC_TYPE_DOUBLE:
2590                                 case ATOMIC_TYPE_LONG_DOUBLE:
2591                                         tc = real_type_class;
2592                                         goto make_const;
2593
2594                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
2595                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
2596                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
2597                                         tc = complex_type_class;
2598                                         goto make_const;
2599                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
2600                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
2601                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
2602                                         tc = complex_type_class;
2603                                         goto make_const;
2604                         }
2605                         panic("Unexpected atomic type in classify_type_to_firm().");
2606                 }
2607
2608                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2609                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2610                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2611                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2612                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2613                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2614
2615                 /* gcc handles this as integer */
2616                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2617
2618                 case TYPE_BUILTIN:
2619                 /* typedef/typeof should be skipped already */
2620                 case TYPE_TYPEDEF:
2621                 case TYPE_TYPEOF:
2622                 case TYPE_INVALID:
2623                 case TYPE_ERROR:
2624                         break;
2625         }
2626         panic("unexpected TYPE classify_type_to_firm().");
2627
2628 make_const: ;
2629         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2630         ir_mode  *const mode = mode_int;
2631         tarval   *const tv   = new_tarval_from_long(tc, mode);
2632         return new_d_Const(dbgi, mode, tv);
2633 }
2634
2635 static ir_node *function_name_to_firm(
2636                 const funcname_expression_t *const expr)
2637 {
2638         switch(expr->kind) {
2639         case FUNCNAME_FUNCTION:
2640         case FUNCNAME_PRETTY_FUNCTION:
2641         case FUNCNAME_FUNCDNAME:
2642                 if (current_function_name == NULL) {
2643                         const source_position_t *const src_pos = &expr->base.source_position;
2644                         const char *const name = current_function_decl->symbol->string;
2645                         const string_t string = { name, strlen(name) + 1 };
2646                         current_function_name = string_to_firm(src_pos, "__func__", &string);
2647                 }
2648                 return current_function_name;
2649         case FUNCNAME_FUNCSIG:
2650                 if (current_funcsig == NULL) {
2651                         const source_position_t *const src_pos = &expr->base.source_position;
2652                         ir_entity *ent = get_irg_entity(current_ir_graph);
2653                         const char *const name = get_entity_ld_name(ent);
2654                         const string_t string = { name, strlen(name) + 1 };
2655                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__", &string);
2656                 }
2657                 return current_funcsig;
2658         }
2659         panic("Unsupported function name");
2660 }
2661
2662 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2663 {
2664         statement_t *statement = expr->statement;
2665
2666         assert(statement->kind == STATEMENT_COMPOUND);
2667         return compound_statement_to_firm(&statement->compound);
2668 }
2669
2670 static ir_node *va_start_expression_to_firm(
2671         const va_start_expression_t *const expr)
2672 {
2673         ir_type   *const method_type = get_ir_type(current_function_decl->type);
2674         int        const n           = get_method_n_params(method_type) - 1;
2675         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2676         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2677         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2678         ir_node   *const no_mem      = new_NoMem();
2679         ir_node   *const arg_sel     =
2680                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2681
2682         ir_node   *const cnst        = get_type_size(expr->parameter->type);
2683         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2684         set_value_for_expression(expr->ap, add);
2685
2686         return NULL;
2687 }
2688
2689 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2690 {
2691         ir_type  *const irtype = get_ir_type(expr->base.type);
2692         ir_node  *const ap     = expression_to_firm(expr->ap);
2693         dbg_info *const dbgi   = get_dbg_info(&expr->base.source_position);
2694         ir_node  *const res    = deref_address(irtype, ap, dbgi);
2695
2696         ir_node  *const cnst      = get_type_size(expr->base.type);
2697         ir_node  *const add       = new_d_Add(dbgi, ap, cnst, mode_P_data);
2698         set_value_for_expression(expr->ap, add);
2699
2700         return res;
2701 }
2702
2703 static ir_node *dereference_addr(const unary_expression_t *const expression)
2704 {
2705         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2706         return expression_to_firm(expression->value);
2707 }
2708
2709 static ir_node *expression_to_addr(const expression_t *expression)
2710 {
2711         switch(expression->kind) {
2712         case EXPR_REFERENCE:
2713                 return reference_addr(&expression->reference);
2714         case EXPR_ARRAY_ACCESS:
2715                 return array_access_addr(&expression->array_access);
2716         case EXPR_SELECT:
2717                 return select_addr(&expression->select);
2718         case EXPR_CALL:
2719                 return call_expression_to_firm(&expression->call);
2720         case EXPR_UNARY_DEREFERENCE: {
2721                 return dereference_addr(&expression->unary);
2722         }
2723         default:
2724                 break;
2725         }
2726         panic("trying to get address of non-lvalue");
2727 }
2728
2729 static ir_node *builtin_constant_to_firm(
2730                 const builtin_constant_expression_t *expression)
2731 {
2732         ir_mode *mode = get_ir_mode(expression->base.type);
2733         long     v;
2734
2735         if (is_constant_expression(expression->value)) {
2736                 v = 1;
2737         } else {
2738                 v = 0;
2739         }
2740         return new_Const_long(mode, v);
2741 }
2742
2743 static ir_node *builtin_prefetch_to_firm(
2744                 const builtin_prefetch_expression_t *expression)
2745 {
2746         ir_node *adr = expression_to_firm(expression->adr);
2747         /* no Firm support for prefetch yet */
2748         (void) adr;
2749         return NULL;
2750 }
2751
2752 static ir_node *_expression_to_firm(const expression_t *expression)
2753 {
2754         switch(expression->kind) {
2755         case EXPR_CHARACTER_CONSTANT:
2756                 return character_constant_to_firm(&expression->conste);
2757         case EXPR_WIDE_CHARACTER_CONSTANT:
2758                 return wide_character_constant_to_firm(&expression->conste);
2759         case EXPR_CONST:
2760                 return const_to_firm(&expression->conste);
2761         case EXPR_STRING_LITERAL:
2762                 return string_literal_to_firm(&expression->string);
2763         case EXPR_WIDE_STRING_LITERAL:
2764                 return wide_string_literal_to_firm(&expression->wide_string);
2765         case EXPR_REFERENCE:
2766                 return reference_expression_to_firm(&expression->reference);
2767         case EXPR_CALL:
2768                 return call_expression_to_firm(&expression->call);
2769         EXPR_UNARY_CASES
2770                 return unary_expression_to_firm(&expression->unary);
2771         EXPR_BINARY_CASES
2772                 return binary_expression_to_firm(&expression->binary);
2773         case EXPR_ARRAY_ACCESS:
2774                 return array_access_to_firm(&expression->array_access);
2775         case EXPR_SIZEOF:
2776                 return sizeof_to_firm(&expression->typeprop);
2777         case EXPR_ALIGNOF:
2778                 return alignof_to_firm(&expression->typeprop);
2779         case EXPR_CONDITIONAL:
2780                 return conditional_to_firm(&expression->conditional);
2781         case EXPR_SELECT:
2782                 return select_to_firm(&expression->select);
2783         case EXPR_CLASSIFY_TYPE:
2784                 return classify_type_to_firm(&expression->classify_type);
2785         case EXPR_FUNCNAME:
2786                 return function_name_to_firm(&expression->funcname);
2787         case EXPR_STATEMENT:
2788                 return statement_expression_to_firm(&expression->statement);
2789         case EXPR_VA_START:
2790                 return va_start_expression_to_firm(&expression->va_starte);
2791         case EXPR_VA_ARG:
2792                 return va_arg_expression_to_firm(&expression->va_arge);
2793         case EXPR_BUILTIN_SYMBOL:
2794                 panic("unimplemented expression found");
2795         case EXPR_BUILTIN_CONSTANT_P:
2796                 return builtin_constant_to_firm(&expression->builtin_constant);
2797         case EXPR_BUILTIN_PREFETCH:
2798                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2799         case EXPR_OFFSETOF:
2800                 return offsetof_to_firm(&expression->offsetofe);
2801         case EXPR_COMPOUND_LITERAL:
2802                 return compound_literal_to_firm(&expression->compound_literal);
2803
2804         case EXPR_UNKNOWN:
2805         case EXPR_INVALID:
2806                 break;
2807         }
2808         panic("invalid expression found");
2809 }
2810
2811 static ir_node *expression_to_firm(const expression_t *expression)
2812 {
2813         ir_node *res = _expression_to_firm(expression);
2814
2815         if(res != NULL && get_irn_mode(res) == mode_b) {
2816                 ir_mode *mode = get_ir_mode(expression->base.type);
2817                 if(is_Const(res)) {
2818                         if(is_Const_null(res)) {
2819                                 return new_Const_long(mode, 0);
2820                         } else {
2821                                 assert(is_Const_one(res));
2822                                 return new_Const_long(mode, 1);
2823                         }
2824                 }
2825
2826                 dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2827                 return produce_condition_result(expression, dbgi);
2828         }
2829
2830         return res;
2831 }
2832
2833 static ir_node *expression_to_modeb(const expression_t *expression)
2834 {
2835         ir_node *res = _expression_to_firm(expression);
2836         res          = create_conv(NULL, res, mode_b);
2837
2838         return res;
2839 }
2840
2841 /**
2842  * create a short-circuit expression evaluation that tries to construct
2843  * efficient control flow structures for &&, || and ! expressions
2844  */
2845 static void create_condition_evaluation(const expression_t *expression,
2846                                         ir_node *true_block,
2847                                         ir_node *false_block)
2848 {
2849         switch(expression->kind) {
2850         case EXPR_UNARY_NOT: {
2851                 const unary_expression_t *unary_expression = &expression->unary;
2852                 create_condition_evaluation(unary_expression->value, false_block,
2853                                             true_block);
2854                 return;
2855         }
2856         case EXPR_BINARY_LOGICAL_AND: {
2857                 const binary_expression_t *binary_expression = &expression->binary;
2858
2859                 ir_node *cur_block   = get_cur_block();
2860                 ir_node *extra_block = new_immBlock();
2861                 set_cur_block(cur_block);
2862                 create_condition_evaluation(binary_expression->left, extra_block,
2863                                             false_block);
2864                 mature_immBlock(extra_block);
2865                 set_cur_block(extra_block);
2866                 create_condition_evaluation(binary_expression->right, true_block,
2867                                             false_block);
2868                 return;
2869         }
2870         case EXPR_BINARY_LOGICAL_OR: {
2871                 const binary_expression_t *binary_expression = &expression->binary;
2872
2873                 ir_node *cur_block   = get_cur_block();
2874                 ir_node *extra_block = new_immBlock();
2875                 set_cur_block(cur_block);
2876                 create_condition_evaluation(binary_expression->left, true_block,
2877                                             extra_block);
2878                 mature_immBlock(extra_block);
2879                 set_cur_block(extra_block);
2880                 create_condition_evaluation(binary_expression->right, true_block,
2881                                             false_block);
2882                 return;
2883         }
2884         default:
2885                 break;
2886         }
2887
2888         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
2889         ir_node  *condition  = expression_to_modeb(expression);
2890         ir_node  *cond       = new_d_Cond(dbgi, condition);
2891         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2892         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2893
2894         /* set branch prediction info based on __builtin_expect */
2895         if(expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
2896                 long               cnst = fold_constant(expression->binary.right);
2897                 cond_jmp_predicate pred;
2898
2899                 if(cnst == 0) {
2900                         pred = COND_JMP_PRED_FALSE;
2901                 } else {
2902                         pred = COND_JMP_PRED_TRUE;
2903                 }
2904                 set_Cond_jmp_pred(cond, pred);
2905         }
2906
2907         add_immBlock_pred(true_block, true_proj);
2908         add_immBlock_pred(false_block, false_proj);
2909
2910         set_cur_block(NULL);
2911 }
2912
2913
2914
2915 static void create_declaration_entity(declaration_t *declaration,
2916                                       declaration_kind_t declaration_kind,
2917                                       ir_type *parent_type)
2918 {
2919         ident     *const id     = new_id_from_str(declaration->symbol->string);
2920         ir_type   *const irtype = get_ir_type(declaration->type);
2921         dbg_info  *const dbgi   = get_dbg_info(&declaration->source_position);
2922         ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
2923         set_entity_ld_ident(entity, id);
2924
2925         declaration->declaration_kind = (unsigned char) declaration_kind;
2926         declaration->v.entity         = entity;
2927         set_entity_variability(entity, variability_uninitialized);
2928         if(parent_type == get_tls_type())
2929                 set_entity_allocation(entity, allocation_automatic);
2930         else if(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
2931                 set_entity_allocation(entity, allocation_static);
2932         /* TODO: visibility? */
2933 }
2934
2935
2936 typedef struct type_path_entry_t type_path_entry_t;
2937 struct type_path_entry_t {
2938         type_t           *type;
2939         ir_initializer_t *initializer;
2940         size_t            index;
2941         declaration_t    *compound_entry;
2942 };
2943
2944 typedef struct type_path_t type_path_t;
2945 struct type_path_t {
2946         type_path_entry_t *path;
2947         type_t            *top_type;
2948         bool               invalid;
2949 };
2950
2951 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
2952 {
2953         size_t len = ARR_LEN(path->path);
2954
2955         for(size_t i = 0; i < len; ++i) {
2956                 const type_path_entry_t *entry = & path->path[i];
2957
2958                 type_t *type = skip_typeref(entry->type);
2959                 if(is_type_compound(type)) {
2960                         fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
2961                 } else if(is_type_array(type)) {
2962                         fprintf(stderr, "[%zd]", entry->index);
2963                 } else {
2964                         fprintf(stderr, "-INVALID-");
2965                 }
2966         }
2967         fprintf(stderr, "  (");
2968         print_type(path->top_type);
2969         fprintf(stderr, ")");
2970 }
2971
2972 static type_path_entry_t *get_type_path_top(const type_path_t *path)
2973 {
2974         size_t len = ARR_LEN(path->path);
2975         assert(len > 0);
2976         return & path->path[len-1];
2977 }
2978
2979 static type_path_entry_t *append_to_type_path(type_path_t *path)
2980 {
2981         size_t len = ARR_LEN(path->path);
2982         ARR_RESIZE(type_path_entry_t, path->path, len+1);
2983
2984         type_path_entry_t *result = & path->path[len];
2985         memset(result, 0, sizeof(result[0]));
2986         return result;
2987 }
2988
2989 static size_t get_compound_size(const compound_type_t *type)
2990 {
2991         declaration_t *declaration = type->declaration;
2992         declaration_t *member      = declaration->scope.declarations;
2993         size_t         size        = 0;
2994         for( ; member != NULL; member = member->next) {
2995                 ++size;
2996         }
2997         /* TODO: cache results? */
2998
2999         return size;
3000 }
3001
3002 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3003 {
3004         type_t *orig_top_type = path->top_type;
3005         type_t *top_type      = skip_typeref(orig_top_type);
3006
3007         assert(is_type_compound(top_type) || is_type_array(top_type));
3008
3009         if(ARR_LEN(path->path) == 0) {
3010                 return NULL;
3011         } else {
3012                 type_path_entry_t *top         = get_type_path_top(path);
3013                 ir_initializer_t  *initializer = top->initializer;
3014                 return get_initializer_compound_value(initializer, top->index);
3015         }
3016 }
3017
3018 static void descend_into_subtype(type_path_t *path)
3019 {
3020         type_t *orig_top_type = path->top_type;
3021         type_t *top_type      = skip_typeref(orig_top_type);
3022
3023         assert(is_type_compound(top_type) || is_type_array(top_type));
3024
3025         ir_initializer_t *initializer = get_initializer_entry(path);
3026
3027         type_path_entry_t *top = append_to_type_path(path);
3028         top->type              = top_type;
3029
3030         size_t len;
3031
3032         if(is_type_compound(top_type)) {
3033                 declaration_t *declaration = top_type->compound.declaration;
3034                 declaration_t *entry       = declaration->scope.declarations;
3035
3036                 top->compound_entry = entry;
3037                 top->index          = 0;
3038                 len                 = get_compound_size(&top_type->compound);
3039                 if(entry != NULL)
3040                         path->top_type = entry->type;
3041         } else {
3042                 assert(is_type_array(top_type));
3043                 assert(top_type->array.size > 0);
3044
3045                 top->index     = 0;
3046                 path->top_type = top_type->array.element_type;
3047                 len            = top_type->array.size;
3048         }
3049         if(initializer == NULL
3050                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3051                 initializer = create_initializer_compound(len);
3052                 /* we have to set the entry at the 2nd latest path entry... */
3053                 size_t path_len = ARR_LEN(path->path);
3054                 assert(path_len >= 1);
3055                 if(path_len > 1) {
3056                         type_path_entry_t *entry        = & path->path[path_len-2];
3057                         ir_initializer_t  *tinitializer = entry->initializer;
3058                         set_initializer_compound_value(tinitializer, entry->index,
3059                                                        initializer);
3060                 }
3061         }
3062         top->initializer = initializer;
3063 }
3064
3065 static void ascend_from_subtype(type_path_t *path)
3066 {
3067         type_path_entry_t *top = get_type_path_top(path);
3068
3069         path->top_type = top->type;
3070
3071         size_t len = ARR_LEN(path->path);
3072         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3073 }
3074
3075 static void walk_designator(type_path_t *path, const designator_t *designator)
3076 {
3077         /* designators start at current object type */
3078         ARR_RESIZE(type_path_entry_t, path->path, 1);
3079
3080         for( ; designator != NULL; designator = designator->next) {
3081                 type_path_entry_t *top         = get_type_path_top(path);
3082                 type_t            *orig_type   = top->type;
3083                 type_t            *type        = skip_typeref(orig_type);
3084
3085                 if(designator->symbol != NULL) {
3086                         assert(is_type_compound(type));
3087                         size_t    index  = 0;
3088                         symbol_t *symbol = designator->symbol;
3089
3090                         declaration_t *declaration = type->compound.declaration;
3091                         declaration_t *iter        = declaration->scope.declarations;
3092                         for( ; iter != NULL; iter = iter->next, ++index) {
3093                                 if(iter->symbol == symbol) {
3094                                         break;
3095                                 }
3096                         }
3097                         assert(iter != NULL);
3098
3099                         top->type           = orig_type;
3100                         top->compound_entry = iter;
3101                         top->index          = index;
3102                         orig_type           = iter->type;
3103                 } else {
3104                         expression_t *array_index = designator->array_index;
3105                         assert(designator->array_index != NULL);
3106                         assert(is_type_array(type));
3107                         assert(is_type_valid(array_index->base.type));
3108
3109                         long index = fold_constant(array_index);
3110                         assert(index >= 0);
3111 #ifndef NDEBUG
3112                         if(type->array.size_constant == 1) {
3113                                 long array_size = type->array.size;
3114                                 assert(index < array_size);
3115                         }
3116 #endif
3117
3118                         top->type  = orig_type;
3119                         top->index = (size_t) index;
3120                         orig_type  = type->array.element_type;
3121                 }
3122                 path->top_type = orig_type;
3123
3124                 if(designator->next != NULL) {
3125                         descend_into_subtype(path);
3126                 }
3127         }
3128
3129         path->invalid  = false;
3130 }
3131
3132 static void advance_current_object(type_path_t *path)
3133 {
3134         if(path->invalid) {
3135                 /* TODO: handle this... */
3136                 panic("invalid initializer in ast2firm (excessive elements)");
3137                 return;
3138         }
3139
3140         type_path_entry_t *top = get_type_path_top(path);
3141
3142         type_t *type = skip_typeref(top->type);
3143         if(is_type_union(type)) {
3144                 top->compound_entry = NULL;
3145         } else if(is_type_struct(type)) {
3146                 declaration_t *entry = top->compound_entry;
3147
3148                 top->index++;
3149                 entry               = entry->next;
3150                 top->compound_entry = entry;
3151                 if(entry != NULL) {
3152                         path->top_type = entry->type;
3153                         return;
3154                 }
3155         } else {
3156                 assert(is_type_array(type));
3157
3158                 top->index++;
3159                 if(!type->array.size_constant || top->index < type->array.size) {
3160                         return;
3161                 }
3162         }
3163
3164         /* we're past the last member of the current sub-aggregate, try if we
3165          * can ascend in the type hierarchy and continue with another subobject */
3166         size_t len = ARR_LEN(path->path);
3167
3168         if(len > 1) {
3169                 ascend_from_subtype(path);
3170                 advance_current_object(path);
3171         } else {
3172                 path->invalid = true;
3173         }
3174 }
3175
3176
3177 static ir_initializer_t *create_ir_initializer(
3178                 const initializer_t *initializer, type_t *type);
3179
3180 static ir_initializer_t *create_ir_initializer_value(
3181                 const initializer_value_t *initializer)
3182 {
3183         ir_node *value = expression_to_firm(initializer->value);
3184         return create_initializer_const(value);
3185 }
3186
3187 static ir_initializer_t *create_ir_initializer_list(
3188                 const initializer_list_t *initializer, type_t *type)
3189 {
3190         type_path_t path;
3191         memset(&path, 0, sizeof(path));
3192         path.top_type = type;
3193         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3194
3195         descend_into_subtype(&path);
3196
3197         for(size_t i = 0; i < initializer->len; ++i) {
3198                 const initializer_t *sub_initializer = initializer->initializers[i];
3199
3200                 if(sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3201                         walk_designator(&path, sub_initializer->designator.designator);
3202                         continue;
3203                 }
3204
3205                 if(sub_initializer->kind == INITIALIZER_VALUE) {
3206                         /* we might have to descend into types until we're at a scalar
3207                          * type */
3208                         while(true) {
3209                                 type_t *orig_top_type = path.top_type;
3210                                 type_t *top_type      = skip_typeref(orig_top_type);
3211
3212                                 if(is_type_scalar(top_type))
3213                                         break;
3214                                 descend_into_subtype(&path);
3215                         }
3216                 }
3217
3218                 ir_initializer_t *sub_irinitializer
3219                         = create_ir_initializer(sub_initializer, path.top_type);
3220
3221                 size_t path_len = ARR_LEN(path.path);
3222                 assert(path_len >= 1);
3223                 type_path_entry_t *entry        = & path.path[path_len-1];
3224                 ir_initializer_t  *tinitializer = entry->initializer;
3225                 set_initializer_compound_value(tinitializer, entry->index,
3226                                                sub_irinitializer);
3227
3228                 advance_current_object(&path);
3229         }
3230
3231         assert(ARR_LEN(path.path) >= 1);
3232         ir_initializer_t *result = path.path[0].initializer;
3233         DEL_ARR_F(path.path);
3234
3235         return result;
3236 }
3237
3238 static ir_initializer_t *create_ir_initializer_string(
3239                 const initializer_string_t *initializer, type_t *type)
3240 {
3241         type = skip_typeref(type);
3242
3243         size_t            string_len    = initializer->string.size;
3244         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3245         size_t            len           = type->array.size;
3246         ir_initializer_t *irinitializer = create_initializer_compound(len);
3247
3248         const char *string = initializer->string.begin;
3249         ir_mode    *mode   = get_type_mode(ir_type_const_char);
3250
3251         for(size_t i = 0; i < len; ++i) {
3252                 char c = 0;
3253                 if(i < string_len)
3254                         c = string[i];
3255
3256                 tarval           *tv = new_tarval_from_long(string[i], mode);
3257                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3258
3259                 set_initializer_compound_value(irinitializer, i, char_initializer);
3260         }
3261
3262         return irinitializer;
3263 }
3264
3265 static ir_initializer_t *create_ir_initializer_wide_string(
3266                 const initializer_wide_string_t *initializer, type_t *type)
3267 {
3268         size_t            string_len    = initializer->string.size;
3269         assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3270         size_t            len           = type->array.size;
3271         ir_initializer_t *irinitializer = create_initializer_compound(len);
3272
3273         const wchar_rep_t *string = initializer->string.begin;
3274         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3275
3276         for(size_t i = 0; i < len; ++i) {
3277                 wchar_rep_t c = 0;
3278                 if(i < string_len) {
3279                         c = string[i];
3280                 }
3281                 tarval *tv = new_tarval_from_long(string[i], mode);
3282                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3283
3284                 set_initializer_compound_value(irinitializer, i, char_initializer);
3285         }
3286
3287         return irinitializer;
3288 }
3289
3290 static ir_initializer_t *create_ir_initializer(
3291                 const initializer_t *initializer, type_t *type)
3292 {
3293         switch(initializer->kind) {
3294                 case INITIALIZER_STRING:
3295                         return create_ir_initializer_string(&initializer->string, type);
3296
3297                 case INITIALIZER_WIDE_STRING:
3298                         return create_ir_initializer_wide_string(&initializer->wide_string,
3299                                                                  type);
3300
3301                 case INITIALIZER_LIST:
3302                         return create_ir_initializer_list(&initializer->list, type);
3303
3304                 case INITIALIZER_VALUE:
3305                         return create_ir_initializer_value(&initializer->value);
3306
3307                 case INITIALIZER_DESIGNATOR:
3308                         panic("unexpected designator initializer found");
3309         }
3310         panic("unknown initializer");
3311 }
3312
3313 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3314                 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3315 {
3316         switch(get_initializer_kind(initializer)) {
3317         case IR_INITIALIZER_NULL: {
3318                 /* TODO: implement this for compound types... */
3319                 assert(type != NULL);
3320
3321                 ir_mode *mode = get_type_mode(type);
3322                 tarval  *zero = get_mode_null(mode);
3323                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3324
3325                 /* TODO: bitfields */
3326                 ir_node *mem    = get_store();
3327                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3328                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3329                 set_store(proj_m);
3330                 return;
3331         }
3332         case IR_INITIALIZER_CONST: {
3333                 ir_node *node = get_initializer_const_value(initializer);
3334                 ir_mode *mode = get_irn_mode(node);
3335                 assert(get_type_mode(type) == mode);
3336
3337                 /* TODO: bitfields... */
3338                 ir_node *mem    = get_store();
3339                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3340                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3341                 set_store(proj_m);
3342                 return;
3343         }
3344         case IR_INITIALIZER_TARVAL: {
3345                 tarval  *tv   = get_initializer_tarval_value(initializer);
3346                 ir_mode *mode = get_tarval_mode(tv);
3347                 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3348                 assert(get_type_mode(type) == mode);
3349
3350                 /* TODO: bitfields... */
3351                 ir_node *mem    = get_store();
3352                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3353                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3354                 set_store(proj_m);
3355                 return;
3356         }
3357         case IR_INITIALIZER_COMPOUND: {
3358                 assert(is_compound_type(type));
3359                 int n_members;
3360                 if(is_Array_type(type)) {
3361                         assert(has_array_upper_bound(type, 0));
3362                         n_members = get_array_upper_bound_int(type, 0);
3363                 } else {
3364                         n_members = get_compound_n_members(type);
3365                 }
3366
3367                 if(get_initializer_compound_n_entries(initializer)
3368                                 != (unsigned) n_members)
3369                         panic("initializer doesn't match compound type");
3370
3371                 for(int i = 0; i < n_members; ++i) {
3372                         ir_node *addr;
3373                         ir_type *irtype;
3374                         if(is_Array_type(type)) {
3375                                 ir_entity *entity   = get_array_element_entity(type);
3376                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3377                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3378                                 ir_node   *in[1]    = { cnst };
3379                                 irtype = get_array_element_type(type);
3380                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3381                         } else {
3382                                 ir_entity *member = get_compound_member(type, i);
3383
3384                                 irtype = get_entity_type(member);
3385                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3386                         }
3387
3388                         ir_initializer_t *sub_init
3389                                 = get_initializer_compound_value(initializer, i);
3390
3391                         create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3392                 }
3393                 return;
3394         }
3395         }
3396
3397         panic("invalid IR_INITIALIZER found");
3398 }
3399
3400 static void create_dynamic_initializer(ir_initializer_t *initializer,
3401                 dbg_info *dbgi, ir_entity *entity)
3402 {
3403         ir_node *frame     = get_local_frame(entity);
3404         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3405         ir_type *type      = get_entity_type(entity);
3406
3407         create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3408 }
3409
3410 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3411                                      ir_entity *entity, type_t *type)
3412 {
3413         ir_node *memory = get_store();
3414         ir_node *nomem  = new_NoMem();
3415         ir_node *frame  = get_irg_frame(current_ir_graph);
3416         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3417
3418         if(initializer->kind == INITIALIZER_VALUE) {
3419                 initializer_value_t *initializer_value = &initializer->value;
3420
3421                 ir_node *value = expression_to_firm(initializer_value->value);
3422                 type = skip_typeref(type);
3423                 assign_value(dbgi, addr, type, value);
3424                 return;
3425         }
3426
3427         if(!is_constant_initializer(initializer)) {
3428                 ir_initializer_t *irinitializer
3429                         = create_ir_initializer(initializer, type);
3430
3431                 create_dynamic_initializer(irinitializer, dbgi, entity);
3432                 return;
3433         }
3434
3435         /* create the ir_initializer */
3436         ir_graph *const old_current_ir_graph = current_ir_graph;
3437         current_ir_graph = get_const_code_irg();
3438
3439         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3440
3441         assert(current_ir_graph == get_const_code_irg());
3442         current_ir_graph = old_current_ir_graph;
3443
3444         /* create a "template" entity which is copied to the entity on the stack */
3445         ident     *const id          = unique_ident("initializer");
3446         ir_type   *const irtype      = get_ir_type(type);
3447         ir_type   *const global_type = get_glob_type();
3448         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3449         set_entity_ld_ident(init_entity, id);
3450
3451         set_entity_variability(init_entity, variability_initialized);
3452         set_entity_visibility(init_entity, visibility_local);
3453         set_entity_allocation(init_entity, allocation_static);
3454
3455         set_entity_initializer(init_entity, irinitializer);
3456
3457         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3458         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3459
3460         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3461         set_store(copyb_mem);
3462 }
3463
3464 static void create_initializer_local_variable_entity(declaration_t *declaration)
3465 {
3466         initializer_t *initializer = declaration->init.initializer;
3467         dbg_info      *dbgi        = get_dbg_info(&declaration->source_position);
3468         ir_entity     *entity      = declaration->v.entity;
3469         type_t        *type        = declaration->type;
3470         create_local_initializer(initializer, dbgi, entity, type);
3471 }
3472
3473 static void create_declaration_initializer(declaration_t *declaration)
3474 {
3475         initializer_t *initializer = declaration->init.initializer;
3476         if(initializer == NULL)
3477                 return;
3478
3479         declaration_kind_t declaration_kind
3480                 = (declaration_kind_t) declaration->declaration_kind;
3481         if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3482                 create_initializer_local_variable_entity(declaration);
3483                 return;
3484         }
3485
3486         if(initializer->kind == INITIALIZER_VALUE) {
3487                 initializer_value_t *initializer_value = &initializer->value;
3488
3489                 ir_node *value = expression_to_firm(initializer_value->value);
3490
3491                 if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3492                         set_value(declaration->v.value_number, value);
3493                 } else {
3494                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3495
3496                         ir_entity *entity = declaration->v.entity;
3497
3498                         set_entity_variability(entity, variability_initialized);
3499                         set_atomic_ent_value(entity, value);
3500                 }
3501         } else {
3502                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3503                                 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3504
3505                 ir_entity        *entity        = declaration->v.entity;
3506                 ir_initializer_t *irinitializer
3507                         = create_ir_initializer(initializer, declaration->type);
3508
3509                 set_entity_variability(entity, variability_initialized);
3510                 set_entity_initializer(entity, irinitializer);
3511         }
3512 }
3513
3514 static void create_variable_length_array(declaration_t *declaration)
3515 {
3516         dbg_info *dbgi      = get_dbg_info(&declaration->source_position);
3517         type_t   *type      = declaration->type;
3518         ir_node  *mem       = get_store();
3519         ir_type  *el_type   = get_ir_type(type->array.element_type);
3520
3521         /* make sure size_node is calculated */
3522         get_type_size(type);
3523         ir_node  *elems = type->array.size_node;
3524         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3525
3526         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3527         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3528         set_store(proj_m);
3529
3530         /* initializers are not allowed for VLAs */
3531         assert(declaration->init.initializer == NULL);
3532
3533         declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3534         declaration->v.vla_base       = addr;
3535
3536         /* TODO: record VLA somewhere so we create the free node when we leave
3537          * it's scope */
3538 }
3539
3540 /**
3541  * Creates a Firm local variable from a declaration.
3542  */
3543 static void create_local_variable(declaration_t *declaration)
3544 {
3545         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3546
3547         bool needs_entity = declaration->address_taken;
3548         type_t *type = skip_typeref(declaration->type);
3549
3550         /* is it a variable length array? */
3551         if(is_type_array(type) && !type->array.size_constant) {
3552                 create_variable_length_array(declaration);
3553                 return;
3554         } else if(is_type_array(type) || is_type_compound(type)) {
3555                 needs_entity = true;
3556         }
3557
3558         if(needs_entity) {
3559                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3560                 create_declaration_entity(declaration,
3561                                           DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3562                                           frame_type);
3563         } else {
3564                 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3565                 declaration->v.value_number   = next_value_number_function;
3566                 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3567                 ++next_value_number_function;
3568         }
3569
3570         create_declaration_initializer(declaration);
3571 }
3572
3573 static void create_local_static_variable(declaration_t *declaration)
3574 {
3575         assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3576
3577         type_t    *const type        = skip_typeref(declaration->type);
3578         ir_type   *const global_type = get_glob_type();
3579         ident     *const id          = unique_ident(declaration->symbol->string);
3580         ir_type   *const irtype      = get_ir_type(type);
3581         dbg_info  *const dbgi        = get_dbg_info(&declaration->source_position);
3582         ir_entity *const entity      = new_d_entity(global_type, id, irtype, dbgi);
3583         set_entity_ld_ident(entity, id);
3584
3585         declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3586         declaration->v.entity         = entity;
3587         set_entity_variability(entity, variability_uninitialized);
3588         set_entity_visibility(entity, visibility_local);
3589         set_entity_allocation(entity, allocation_static);
3590
3591         ir_graph *const old_current_ir_graph = current_ir_graph;
3592         current_ir_graph = get_const_code_irg();
3593
3594         create_declaration_initializer(declaration);
3595
3596         assert(current_ir_graph == get_const_code_irg());
3597         current_ir_graph = old_current_ir_graph;
3598 }
3599
3600
3601
3602 static void return_statement_to_firm(return_statement_t *statement)
3603 {
3604         if(get_cur_block() == NULL)
3605                 return;
3606
3607         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
3608         ir_type  *func_irtype = get_ir_type(current_function_decl->type);
3609
3610
3611         ir_node *in[1];
3612         int      in_len;
3613         if(get_method_n_ress(func_irtype) > 0) {
3614                 ir_type *res_type = get_method_res_type(func_irtype, 0);
3615
3616                 if(statement->value != NULL) {
3617                         ir_node *node = expression_to_firm(statement->value);
3618                         node  = do_strict_conv(dbgi, node);
3619                         in[0] = node;
3620                 } else {
3621                         ir_mode *mode;
3622                         if(is_compound_type(res_type)) {
3623                                 mode = mode_P_data;
3624                         } else {
3625                                 mode = get_type_mode(res_type);
3626                         }
3627                         in[0] = new_Unknown(mode);
3628                 }
3629                 in_len = 1;
3630         } else {
3631                 /* build return_value for its side effects */
3632                 if(statement->value != NULL) {
3633                         expression_to_firm(statement->value);
3634                 }
3635                 in_len = 0;
3636         }
3637
3638         ir_node  *store = get_store();
3639         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
3640
3641         ir_node *end_block = get_irg_end_block(current_ir_graph);
3642         add_immBlock_pred(end_block, ret);
3643
3644         set_cur_block(NULL);
3645 }
3646
3647 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3648 {
3649         if(get_cur_block() == NULL)
3650                 return NULL;
3651
3652         return expression_to_firm(statement->expression);
3653 }
3654
3655 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3656 {
3657         ir_node     *result    = NULL;
3658         statement_t *statement = compound->statements;
3659         for( ; statement != NULL; statement = statement->base.next) {
3660                 //context2firm(&statement->scope);
3661
3662                 if(statement->base.next == NULL
3663                                 && statement->kind == STATEMENT_EXPRESSION) {
3664                         result = expression_statement_to_firm(
3665                                         &statement->expression);
3666                         break;
3667                 }
3668                 statement_to_firm(statement);
3669         }
3670
3671         return result;
3672 }
3673
3674 static void create_global_variable(declaration_t *declaration)
3675 {
3676         ir_visibility  vis;
3677         ir_type       *var_type;
3678         switch ((storage_class_tag_t)declaration->storage_class) {
3679                 case STORAGE_CLASS_STATIC:
3680                         vis = visibility_local;
3681                         goto global_var;
3682
3683                 case STORAGE_CLASS_EXTERN:
3684                         vis = visibility_external_allocated;
3685                         goto global_var;
3686
3687                 case STORAGE_CLASS_NONE:
3688                         vis = visibility_external_visible;
3689                         goto global_var;
3690
3691                 case STORAGE_CLASS_THREAD:
3692                         vis = visibility_external_visible;
3693                         goto tls_var;
3694
3695                 case STORAGE_CLASS_THREAD_EXTERN:
3696                         vis = visibility_external_allocated;
3697                         goto tls_var;
3698
3699                 case STORAGE_CLASS_THREAD_STATIC:
3700                         vis = visibility_local;
3701                         goto tls_var;
3702
3703 tls_var:
3704                         var_type = get_tls_type();
3705                         goto create_var;
3706
3707 global_var:
3708                         var_type = get_glob_type();
3709                         goto create_var;
3710
3711 create_var:
3712                         create_declaration_entity(declaration,
3713                                                   DECLARATION_KIND_GLOBAL_VARIABLE,
3714                                                   var_type);
3715                         set_entity_visibility(declaration->v.entity, vis);
3716
3717                         return;
3718
3719                 case STORAGE_CLASS_TYPEDEF:
3720                 case STORAGE_CLASS_AUTO:
3721                 case STORAGE_CLASS_REGISTER:
3722                 case STORAGE_CLASS_ENUM_ENTRY:
3723                         break;
3724         }
3725         panic("Invalid storage class for global variable");
3726 }
3727
3728 static void create_local_declaration(declaration_t *declaration)
3729 {
3730         if(declaration->symbol == NULL)
3731                 return;
3732
3733         type_t *type = skip_typeref(declaration->type);
3734
3735         switch ((storage_class_tag_t) declaration->storage_class) {
3736         case STORAGE_CLASS_STATIC:
3737                 create_local_static_variable(declaration);
3738                 return;
3739         case STORAGE_CLASS_EXTERN:
3740                 create_global_variable(declaration);
3741                 create_declaration_initializer(declaration);
3742                 return;
3743         case STORAGE_CLASS_NONE:
3744         case STORAGE_CLASS_AUTO:
3745         case STORAGE_CLASS_REGISTER:
3746                 if(is_type_function(type)) {
3747                         if(declaration->init.statement != NULL) {
3748                                 panic("nested functions not supported yet");
3749                         } else {
3750                                 get_function_entity(declaration);
3751                         }
3752                 } else {
3753                         create_local_variable(declaration);
3754                 }
3755                 return;
3756         case STORAGE_CLASS_ENUM_ENTRY:
3757         case STORAGE_CLASS_TYPEDEF:
3758         case STORAGE_CLASS_THREAD:
3759         case STORAGE_CLASS_THREAD_EXTERN:
3760         case STORAGE_CLASS_THREAD_STATIC:
3761                 return;
3762         }
3763         panic("invalid storage class found");
3764 }
3765
3766 static void declaration_statement_to_firm(declaration_statement_t *statement)
3767 {
3768         declaration_t *declaration = statement->declarations_begin;
3769         declaration_t *end         = statement->declarations_end->next;
3770         for( ; declaration != end; declaration = declaration->next) {
3771                 if(declaration->namespc != NAMESPACE_NORMAL)
3772                         continue;
3773                 create_local_declaration(declaration);
3774         }
3775 }
3776
3777 static void if_statement_to_firm(if_statement_t *statement)
3778 {
3779         ir_node *cur_block = get_cur_block();
3780
3781         ir_node *fallthrough_block = new_immBlock();
3782
3783         /* the true (blocks) */
3784         ir_node *true_block;
3785         if (statement->true_statement != NULL) {
3786                 true_block = new_immBlock();
3787                 statement_to_firm(statement->true_statement);
3788                 if(get_cur_block() != NULL) {
3789                         ir_node *jmp = new_Jmp();
3790                         add_immBlock_pred(fallthrough_block, jmp);
3791                 }
3792         } else {
3793                 true_block = fallthrough_block;
3794         }
3795
3796         /* the false (blocks) */
3797         ir_node *false_block;
3798         if(statement->false_statement != NULL) {
3799                 false_block = new_immBlock();
3800
3801                 statement_to_firm(statement->false_statement);
3802                 if(get_cur_block() != NULL) {
3803                         ir_node *jmp = new_Jmp();
3804                         add_immBlock_pred(fallthrough_block, jmp);
3805                 }
3806         } else {
3807                 false_block = fallthrough_block;
3808         }
3809
3810         /* create the condition */
3811         if(cur_block != NULL) {
3812                 set_cur_block(cur_block);
3813                 create_condition_evaluation(statement->condition, true_block,
3814                                             false_block);
3815         }
3816
3817         mature_immBlock(true_block);
3818         if(false_block != fallthrough_block) {
3819                 mature_immBlock(false_block);
3820         }
3821         mature_immBlock(fallthrough_block);
3822
3823         set_cur_block(fallthrough_block);
3824 }
3825
3826 static void while_statement_to_firm(while_statement_t *statement)
3827 {
3828         ir_node *jmp = NULL;
3829         if(get_cur_block() != NULL) {
3830                 jmp = new_Jmp();
3831         }
3832
3833         /* create the header block */
3834         ir_node *header_block = new_immBlock();
3835         if(jmp != NULL) {
3836                 add_immBlock_pred(header_block, jmp);
3837         }
3838
3839         /* the false block */
3840         ir_node *false_block = new_immBlock();
3841
3842         /* the loop body */
3843         ir_node *body_block;
3844         if (statement->body != NULL) {
3845                 ir_node *old_continue_label = continue_label;
3846                 ir_node *old_break_label    = break_label;
3847                 continue_label              = header_block;
3848                 break_label                 = false_block;
3849
3850                 body_block = new_immBlock();
3851                 statement_to_firm(statement->body);
3852
3853                 assert(continue_label == header_block);
3854                 assert(break_label    == false_block);
3855                 continue_label = old_continue_label;
3856                 break_label    = old_break_label;
3857
3858                 if(get_cur_block() != NULL) {
3859                         jmp = new_Jmp();
3860                         add_immBlock_pred(header_block, jmp);
3861                 }
3862         } else {
3863                 body_block = header_block;
3864         }
3865
3866         /* create the condition */
3867         set_cur_block(header_block);
3868
3869         create_condition_evaluation(statement->condition, body_block, false_block);
3870         mature_immBlock(body_block);
3871         mature_immBlock(false_block);
3872         mature_immBlock(header_block);
3873
3874         set_cur_block(false_block);
3875 }
3876
3877 static void do_while_statement_to_firm(do_while_statement_t *statement)
3878 {
3879         ir_node *jmp = NULL;
3880         if(get_cur_block() != NULL) {
3881                 jmp = new_Jmp();
3882         }
3883
3884         /* create the header block */
3885         ir_node *header_block = new_immBlock();
3886
3887         /* the false block */
3888         ir_node *false_block = new_immBlock();
3889
3890         /* the loop body */
3891         ir_node *body_block = new_immBlock();
3892         if(jmp != NULL) {
3893                 add_immBlock_pred(body_block, jmp);
3894         }
3895
3896         if (statement->body != NULL) {
3897                 ir_node *old_continue_label = continue_label;
3898                 ir_node *old_break_label    = break_label;
3899                 continue_label              = header_block;
3900                 break_label                 = false_block;
3901
3902                 statement_to_firm(statement->body);
3903
3904                 assert(continue_label == header_block);
3905                 assert(break_label    == false_block);
3906                 continue_label = old_continue_label;
3907                 break_label    = old_break_label;
3908
3909                 if (get_cur_block() == NULL) {
3910                         mature_immBlock(header_block);
3911                         mature_immBlock(body_block);
3912                         mature_immBlock(false_block);
3913                         return;
3914                 }
3915         }
3916
3917         ir_node *body_jmp = new_Jmp();
3918         add_immBlock_pred(header_block, body_jmp);
3919         mature_immBlock(header_block);
3920
3921         /* create the condition */
3922         set_cur_block(header_block);
3923
3924         create_condition_evaluation(statement->condition, body_block, false_block);
3925         mature_immBlock(body_block);
3926         mature_immBlock(false_block);
3927         mature_immBlock(header_block);
3928
3929         set_cur_block(false_block);
3930 }
3931
3932 static void for_statement_to_firm(for_statement_t *statement)
3933 {
3934         ir_node *jmp = NULL;
3935         if (get_cur_block() != NULL) {
3936                 if(statement->initialisation != NULL) {
3937                         expression_to_firm(statement->initialisation);
3938                 }
3939
3940                 /* create declarations */
3941                 declaration_t *declaration = statement->scope.declarations;
3942                 for( ; declaration != NULL; declaration = declaration->next) {
3943                         create_local_declaration(declaration);
3944                 }
3945
3946                 jmp = new_Jmp();
3947         }
3948
3949
3950         /* create the step block */
3951         ir_node *const step_block = new_immBlock();
3952         if (statement->step != NULL) {
3953                 expression_to_firm(statement->step);
3954         }
3955         ir_node *const step_jmp = new_Jmp();
3956
3957         /* create the header block */
3958         ir_node *const header_block = new_immBlock();
3959         if (jmp != NULL) {
3960                 add_immBlock_pred(header_block, jmp);
3961         }
3962         add_immBlock_pred(header_block, step_jmp);
3963
3964         /* the false block */
3965         ir_node *const false_block = new_immBlock();
3966
3967         /* the loop body */
3968         ir_node * body_block;
3969         if (statement->body != NULL) {
3970                 ir_node *const old_continue_label = continue_label;
3971                 ir_node *const old_break_label    = break_label;
3972                 continue_label = step_block;
3973                 break_label    = false_block;
3974
3975                 body_block = new_immBlock();
3976                 statement_to_firm(statement->body);
3977
3978                 assert(continue_label == step_block);
3979                 assert(break_label    == false_block);
3980                 continue_label = old_continue_label;
3981                 break_label    = old_break_label;
3982
3983                 if (get_cur_block() != NULL) {
3984                         jmp = new_Jmp();
3985                         add_immBlock_pred(step_block, jmp);
3986                 }
3987         } else {
3988                 body_block = step_block;
3989         }
3990
3991         /* create the condition */
3992         set_cur_block(header_block);
3993         if (statement->condition != NULL) {
3994                 create_condition_evaluation(statement->condition, body_block,
3995                                             false_block);
3996         } else {
3997                 keep_alive(header_block);
3998                 jmp = new_Jmp();
3999                 add_immBlock_pred(body_block, jmp);
4000         }
4001
4002         mature_immBlock(body_block);
4003         mature_immBlock(false_block);
4004         mature_immBlock(step_block);
4005         mature_immBlock(header_block);
4006         mature_immBlock(false_block);
4007
4008         set_cur_block(false_block);
4009 }
4010
4011 static void create_jump_statement(const statement_t *statement,
4012                                   ir_node *target_block)
4013 {
4014         if(get_cur_block() == NULL)
4015                 return;
4016
4017         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4018         ir_node  *jump = new_d_Jmp(dbgi);
4019         add_immBlock_pred(target_block, jump);
4020
4021         set_cur_block(NULL);
4022 }
4023
4024 static void switch_statement_to_firm(const switch_statement_t *statement)
4025 {
4026         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4027
4028         ir_node *expression  = expression_to_firm(statement->expression);
4029         ir_node *cond        = new_d_Cond(dbgi, expression);
4030         ir_node *break_block = new_immBlock();
4031
4032         set_cur_block(NULL);
4033
4034         ir_node *const old_switch_cond       = current_switch_cond;
4035         ir_node *const old_break_label       = break_label;
4036         const bool     old_saw_default_label = saw_default_label;
4037         current_switch_cond                  = cond;
4038         break_label                          = break_block;
4039
4040         if (statement->body != NULL) {
4041                 statement_to_firm(statement->body);
4042         }
4043
4044         if(get_cur_block() != NULL) {
4045                 ir_node *jmp = new_Jmp();
4046                 add_immBlock_pred(break_block, jmp);
4047         }
4048
4049         if (!saw_default_label) {
4050                 set_cur_block(get_nodes_block(cond));
4051                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4052                                                         MAGIC_DEFAULT_PN_NUMBER);
4053                 add_immBlock_pred(break_block, proj);
4054         }
4055
4056         assert(current_switch_cond == cond);
4057         assert(break_label         == break_block);
4058         current_switch_cond = old_switch_cond;
4059         break_label         = old_break_label;
4060         saw_default_label   = old_saw_default_label;
4061
4062         mature_immBlock(break_block);
4063         set_cur_block(break_block);
4064 }
4065
4066 static void case_label_to_firm(const case_label_statement_t *statement)
4067 {
4068         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4069
4070         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4071
4072         /* let's create a node and hope firm constant folding creates a Const
4073          * node... */
4074         ir_node *proj;
4075         ir_node *old_block = get_nodes_block(current_switch_cond);
4076         ir_node *block     = new_immBlock();
4077
4078         set_cur_block(old_block);
4079         if(statement->expression != NULL) {
4080                 long start_pn = fold_constant(statement->expression);
4081                 long end_pn = start_pn;
4082                 if (statement->end_range != NULL) {
4083                         end_pn = fold_constant(statement->end_range);
4084                 }
4085                 assert(start_pn <= end_pn);
4086                 /* create jumps for all cases in the given range */
4087                 for (long pn = start_pn; pn <= end_pn; ++pn) {
4088                         if(pn == MAGIC_DEFAULT_PN_NUMBER) {
4089                                 /* oops someone detected our cheating... */
4090                                 panic("magic default pn used");
4091                         }
4092                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4093                         add_immBlock_pred(block, proj);
4094                 }
4095         } else {
4096                 saw_default_label = true;
4097                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4098                                          MAGIC_DEFAULT_PN_NUMBER);
4099
4100                 add_immBlock_pred(block, proj);
4101         }
4102
4103         if (fallthrough != NULL) {
4104                 add_immBlock_pred(block, fallthrough);
4105         }
4106         mature_immBlock(block);
4107         set_cur_block(block);
4108
4109         if(statement->statement != NULL) {
4110                 statement_to_firm(statement->statement);
4111         }
4112 }
4113
4114 static ir_node *get_label_block(declaration_t *label)
4115 {
4116         assert(label->namespc == NAMESPACE_LABEL);
4117
4118         if(label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
4119                 return label->v.block;
4120         }
4121         assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
4122
4123         ir_node *old_cur_block = get_cur_block();
4124         ir_node *block         = new_immBlock();
4125         set_cur_block(old_cur_block);
4126
4127         label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
4128         label->v.block          = block;
4129
4130         ARR_APP1(ir_node *, imature_blocks, block);
4131
4132         return block;
4133 }
4134
4135 static void label_to_firm(const label_statement_t *statement)
4136 {
4137         ir_node *block = get_label_block(statement->label);
4138
4139         if(get_cur_block() != NULL) {
4140                 ir_node *jmp = new_Jmp();
4141                 add_immBlock_pred(block, jmp);
4142         }
4143
4144         set_cur_block(block);
4145         keep_alive(block);
4146
4147         if(statement->statement != NULL) {
4148                 statement_to_firm(statement->statement);
4149         }
4150 }
4151
4152 static void goto_to_firm(const goto_statement_t *statement)
4153 {
4154         if(get_cur_block() == NULL)
4155                 return;
4156
4157         ir_node *block = get_label_block(statement->label);
4158         ir_node *jmp   = new_Jmp();
4159         add_immBlock_pred(block, jmp);
4160
4161         set_cur_block(NULL);
4162 }
4163
4164 typedef enum modifier_t {
4165         ASM_MODIFIER_WRITE_ONLY   = 1 << 0,
4166         ASM_MODIFIER_READ_WRITE   = 1 << 1,
4167         ASM_MODIFIER_COMMUTATIVE  = 1 << 2,
4168         ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
4169 } modifier_t;
4170
4171 static void asm_statement_to_firm(const asm_statement_t *statement)
4172 {
4173         (void) statement;
4174         fprintf(stderr, "WARNING asm not implemented yet!\n");
4175 #if 0
4176         bool needs_memory = false;
4177
4178         size_t         n_clobbers = 0;
4179         asm_clobber_t *clobber    = statement->clobbers;
4180         for( ; clobber != NULL; clobber = clobber->next) {
4181                 if(strcmp(clobber->clobber, "memory") == 0) {
4182                         needs_memory = true;
4183                         continue;
4184                 }
4185
4186                 ident *id = new_id_from_str(clobber->clobber);
4187                 obstack_ptr_grow(&asm_obst, id);
4188                 ++n_clobbers;
4189         }
4190         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4191         ident **clobbers = NULL;
4192         if(n_clobbers > 0) {
4193                 clobbers = obstack_finish(&asm_obst);
4194         }
4195
4196         /* find and count input and output constraints */
4197         asm_constraint_t *constraint = statement->inputs;
4198         for( ; constraint != NULL; constraint = constraint->next) {
4199                 int  modifiers      = 0;
4200                 bool supports_memop = false;
4201                 for(const char *c = constraint->constraints; *c != 0; ++c) {
4202                         /* TODO: improve error messages */
4203                         switch(*c) {
4204                         case '?':
4205                         case '!':
4206                                 panic("multiple alternative assembler constraints not "
4207                                       "supported");
4208                         case 'm':
4209                         case 'o':
4210                         case 'V':
4211                         case '<':
4212                         case '>':
4213                         case 'X':
4214                                 supports_memop = true;
4215                                 obstack_1grow(&asm_obst, *c);
4216                                 break;
4217                         case '=':
4218                                 if(modifiers & ASM_MODIFIER_READ_WRITE)
4219                                         panic("inconsistent register constraints");
4220                                 modifiers |= ASM_MODIFIER_WRITE_ONLY;
4221                                 break;
4222                         case '+':
4223                                 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
4224                                         panic("inconsistent register constraints");
4225                                 modifiers |= ASM_MODIFIER_READ_WRITE;
4226                                 break;
4227                         case '&':
4228                                 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
4229                                 panic("early clobber assembler constraint not supported yet");
4230                                 break;
4231                         case '%':
4232                                 modifiers |= ASM_MODIFIER_COMMUTATIVE;
4233                                 panic("commutative assembler constraint not supported yet");
4234                                 break;
4235                         case '#':
4236                                 /* skip register preferences stuff... */
4237                                 while(*c != 0 && *c != ',')
4238                                         ++c;
4239                                 break;
4240                         case '*':
4241                                 /* skip register preferences stuff... */
4242                                 ++c;
4243                                 break;
4244                         default:
4245                                 obstack_1grow(&asm_obst, *c);
4246                                 break;
4247                         }
4248                 }
4249                 obstack_1grow(&asm_obst, '\0');
4250                 const char *constraint_string = obstack_finish(&asm_obst);
4251
4252                 needs_memory |= supports_memop;
4253                 if(supports_memop) {
4254
4255                 }
4256         }
4257 #endif
4258 }
4259
4260 static void statement_to_firm(statement_t *statement)
4261 {
4262         switch(statement->kind) {
4263         case STATEMENT_INVALID:
4264                 panic("invalid statement found");
4265                 return;
4266         case STATEMENT_EMPTY:
4267                 /* nothing */
4268                 return;
4269         case STATEMENT_COMPOUND:
4270                 compound_statement_to_firm(&statement->compound);
4271                 return;
4272         case STATEMENT_RETURN:
4273                 return_statement_to_firm(&statement->returns);
4274                 return;
4275         case STATEMENT_EXPRESSION:
4276                 expression_statement_to_firm(&statement->expression);
4277                 return;
4278         case STATEMENT_IF:
4279                 if_statement_to_firm(&statement->ifs);
4280                 return;
4281         case STATEMENT_WHILE:
4282                 while_statement_to_firm(&statement->whiles);
4283                 return;
4284         case STATEMENT_DO_WHILE:
4285                 do_while_statement_to_firm(&statement->do_while);
4286                 return;
4287         case STATEMENT_DECLARATION:
4288                 declaration_statement_to_firm(&statement->declaration);
4289                 return;
4290         case STATEMENT_BREAK:
4291                 create_jump_statement(statement, break_label);
4292                 return;
4293         case STATEMENT_CONTINUE:
4294                 create_jump_statement(statement, continue_label);
4295                 return;
4296         case STATEMENT_SWITCH:
4297                 switch_statement_to_firm(&statement->switchs);
4298                 return;
4299         case STATEMENT_CASE_LABEL:
4300                 case_label_to_firm(&statement->case_label);
4301                 return;
4302         case STATEMENT_FOR:
4303                 for_statement_to_firm(&statement->fors);
4304                 return;
4305         case STATEMENT_LABEL:
4306                 label_to_firm(&statement->label);
4307                 return;
4308         case STATEMENT_GOTO:
4309                 goto_to_firm(&statement->gotos);
4310                 return;
4311         case STATEMENT_ASM:
4312                 asm_statement_to_firm(&statement->asms);
4313                 return;
4314         }
4315         panic("Statement not implemented\n");
4316 }
4317
4318 static int count_decls_in_expression(const expression_t *expression);
4319
4320 static int count_local_declarations(const declaration_t *      decl,
4321                                     const declaration_t *const end)
4322 {
4323         int count = 0;
4324         for (; decl != end; decl = decl->next) {
4325                 if(decl->namespc != NAMESPACE_NORMAL)
4326                         continue;
4327                 const type_t *type = skip_typeref(decl->type);
4328                 if (!decl->address_taken && is_type_scalar(type))
4329                         ++count;
4330                 const initializer_t *initializer = decl->init.initializer;
4331                 /* FIXME: should walk initializer hierarchies... */
4332                 if(initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4333                         count += count_decls_in_expression(initializer->value.value);
4334                 }
4335         }
4336         return count;
4337 }
4338
4339 static int count_decls_in_expression(const expression_t *expression) {
4340         int count = 0;
4341
4342         if(expression == NULL)
4343                 return 0;
4344
4345         switch((expression_kind_t) expression->base.kind) {
4346         case EXPR_STATEMENT:
4347                 return count_decls_in_stmts(expression->statement.statement);
4348         EXPR_BINARY_CASES {
4349                 int count_left  = count_decls_in_expression(expression->binary.left);
4350                 int count_right = count_decls_in_expression(expression->binary.right);
4351                 return count_left + count_right;
4352         }
4353         EXPR_UNARY_CASES
4354                 return count_decls_in_expression(expression->unary.value);
4355         case EXPR_CALL: {
4356                 call_argument_t *argument = expression->call.arguments;
4357                 for( ; argument != NULL; argument = argument->next) {
4358                         count += count_decls_in_expression(argument->expression);
4359                 }
4360                 return count;
4361         }
4362
4363         case EXPR_UNKNOWN:
4364         case EXPR_INVALID:
4365                 panic("unexpected expression kind");
4366
4367         case EXPR_COMPOUND_LITERAL:
4368                 /* TODO... */
4369                 break;
4370
4371         case EXPR_CONDITIONAL:
4372                 count += count_decls_in_expression(expression->conditional.condition);
4373                 count += count_decls_in_expression(expression->conditional.true_expression);
4374                 count += count_decls_in_expression(expression->conditional.false_expression);
4375                 return count;
4376
4377         case EXPR_BUILTIN_PREFETCH:
4378                 count += count_decls_in_expression(expression->builtin_prefetch.adr);
4379                 count += count_decls_in_expression(expression->builtin_prefetch.rw);
4380                 count += count_decls_in_expression(expression->builtin_prefetch.locality);
4381                 return count;
4382
4383         case EXPR_BUILTIN_CONSTANT_P:
4384                 count += count_decls_in_expression(expression->builtin_constant.value);
4385                 return count;
4386
4387         case EXPR_SELECT:
4388                 count += count_decls_in_expression(expression->select.compound);
4389                 return count;
4390
4391         case EXPR_ARRAY_ACCESS:
4392                 count += count_decls_in_expression(expression->array_access.array_ref);
4393                 count += count_decls_in_expression(expression->array_access.index);
4394                 return count;
4395
4396         case EXPR_CLASSIFY_TYPE:
4397                 count += count_decls_in_expression(expression->classify_type.type_expression);
4398                 return count;
4399
4400         case EXPR_SIZEOF:
4401         case EXPR_ALIGNOF: {
4402                 expression_t *tp_expression = expression->typeprop.tp_expression;
4403                 if (tp_expression != NULL) {
4404                         count += count_decls_in_expression(tp_expression);
4405                 }
4406                 return count;
4407         }
4408
4409         case EXPR_OFFSETOF:
4410         case EXPR_REFERENCE:
4411         case EXPR_CONST:
4412         case EXPR_CHARACTER_CONSTANT:
4413         case EXPR_WIDE_CHARACTER_CONSTANT:
4414         case EXPR_STRING_LITERAL:
4415         case EXPR_WIDE_STRING_LITERAL:
4416         case EXPR_FUNCNAME:
4417         case EXPR_BUILTIN_SYMBOL:
4418         case EXPR_VA_START:
4419         case EXPR_VA_ARG:
4420                 break;
4421         }
4422
4423         /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
4424          * (or implement all the missing expressions here/implement a walker)
4425          */
4426
4427         return 0;
4428 }
4429
4430 static int count_decls_in_stmts(const statement_t *stmt)
4431 {
4432         int count = 0;
4433         for (; stmt != NULL; stmt = stmt->base.next) {
4434                 switch (stmt->kind) {
4435                         case STATEMENT_EMPTY:
4436                                 break;
4437
4438                         case STATEMENT_DECLARATION: {
4439                                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
4440                                 count += count_local_declarations(decl_stmt->declarations_begin,
4441                                                                   decl_stmt->declarations_end->next);
4442                                 break;
4443                         }
4444
4445                         case STATEMENT_COMPOUND: {
4446                                 const compound_statement_t *const comp =
4447                                         &stmt->compound;
4448                                 count += count_decls_in_stmts(comp->statements);
4449                                 break;
4450                         }
4451
4452                         case STATEMENT_IF: {
4453                                 const if_statement_t *const if_stmt = &stmt->ifs;
4454                                 count += count_decls_in_expression(if_stmt->condition);
4455                                 count += count_decls_in_stmts(if_stmt->true_statement);
4456                                 count += count_decls_in_stmts(if_stmt->false_statement);
4457                                 break;
4458                         }
4459
4460                         case STATEMENT_SWITCH: {
4461                                 const switch_statement_t *const switch_stmt = &stmt->switchs;
4462                                 count += count_decls_in_expression(switch_stmt->expression);
4463                                 count += count_decls_in_stmts(switch_stmt->body);
4464                                 break;
4465                         }
4466
4467                         case STATEMENT_LABEL: {
4468                                 const label_statement_t *const label_stmt = &stmt->label;
4469                                 if(label_stmt->statement != NULL) {
4470                                         count += count_decls_in_stmts(label_stmt->statement);
4471                                 }
4472                                 break;
4473                         }
4474
4475                         case STATEMENT_WHILE: {
4476                                 const while_statement_t *const while_stmt = &stmt->whiles;
4477                                 count += count_decls_in_expression(while_stmt->condition);
4478                                 count += count_decls_in_stmts(while_stmt->body);
4479                                 break;
4480                         }
4481
4482                         case STATEMENT_DO_WHILE: {
4483                                 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
4484                                 count += count_decls_in_expression(do_while_stmt->condition);
4485                                 count += count_decls_in_stmts(do_while_stmt->body);
4486                                 break;
4487                         }
4488
4489                         case STATEMENT_FOR: {
4490                                 const for_statement_t *const for_stmt = &stmt->fors;
4491                                 count += count_local_declarations(for_stmt->scope.declarations, NULL);
4492                                 count += count_decls_in_expression(for_stmt->initialisation);
4493                                 count += count_decls_in_expression(for_stmt->condition);
4494                                 count += count_decls_in_expression(for_stmt->step);
4495                                 count += count_decls_in_stmts(for_stmt->body);
4496                                 break;
4497                         }
4498
4499                         case STATEMENT_CASE_LABEL: {
4500                                 const case_label_statement_t *label = &stmt->case_label;
4501                                 count += count_decls_in_expression(label->expression);
4502                                 if(label->statement != NULL) {
4503                                         count += count_decls_in_stmts(label->statement);
4504                                 }
4505                                 break;
4506                         }
4507
4508                         case STATEMENT_ASM:
4509                         case STATEMENT_BREAK:
4510                         case STATEMENT_CONTINUE:
4511                                 break;
4512
4513                         case STATEMENT_EXPRESSION: {
4514                                 const expression_statement_t *expr_stmt = &stmt->expression;
4515                                 count += count_decls_in_expression(expr_stmt->expression);
4516                                 break;
4517                         }
4518
4519                         case STATEMENT_GOTO:
4520                         case STATEMENT_INVALID:
4521                                 break;
4522
4523                         case STATEMENT_RETURN: {
4524                                 const return_statement_t *ret_stmt = &stmt->returns;
4525                                 count += count_decls_in_expression(ret_stmt->value);
4526                                 break;
4527                         }
4528                 }
4529         }
4530         return count;
4531 }
4532
4533 static int get_function_n_local_vars(declaration_t *declaration)
4534 {
4535         int count = 0;
4536
4537         /* count parameters */
4538         count += count_local_declarations(declaration->scope.declarations, NULL);
4539
4540         /* count local variables declared in body */
4541         count += count_decls_in_stmts(declaration->init.statement);
4542
4543         return count;
4544 }
4545
4546 static void initialize_function_parameters(declaration_t *declaration)
4547 {
4548         ir_graph        *irg             = current_ir_graph;
4549         ir_node         *args            = get_irg_args(irg);
4550         ir_node         *start_block     = get_irg_start_block(irg);
4551         ir_type         *function_irtype = get_ir_type(declaration->type);
4552
4553         int            n         = 0;
4554         declaration_t *parameter = declaration->scope.declarations;
4555         for( ; parameter != NULL; parameter = parameter->next, ++n) {
4556                 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
4557                 type_t *type = skip_typeref(parameter->type);
4558
4559                 bool needs_entity = parameter->address_taken;
4560                 assert(!is_type_array(type));
4561                 if(is_type_compound(type)) {
4562                         needs_entity = true;
4563                 }
4564
4565                 if(needs_entity) {
4566                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
4567                         ident     *id     = new_id_from_str(parameter->symbol->string);
4568                         set_entity_ident(entity, id);
4569
4570                         parameter->declaration_kind
4571                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
4572                         parameter->v.entity = entity;
4573                         continue;
4574                 }
4575
4576                 ir_mode *mode = get_ir_mode(parameter->type);
4577                 long     pn   = n;
4578                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
4579
4580                 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
4581                 parameter->v.value_number   = next_value_number_function;
4582                 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
4583                 ++next_value_number_function;
4584
4585                 set_value(parameter->v.value_number, proj);
4586         }
4587 }
4588
4589 /**
4590  * Handle additional decl modifiers for IR-graphs
4591  *
4592  * @param irg            the IR-graph
4593  * @param dec_modifiers  additional modifiers
4594  */
4595 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
4596 {
4597         if (decl_modifiers & DM_NORETURN) {
4598                 /* TRUE if the declaration includes the Microsoft
4599                    __declspec(noreturn) specifier. */
4600                 set_irg_additional_property(irg, mtp_property_noreturn);
4601         }
4602         if (decl_modifiers & DM_NOTHROW) {
4603                 /* TRUE if the declaration includes the Microsoft
4604                    __declspec(nothrow) specifier. */
4605                 set_irg_additional_property(irg, mtp_property_nothrow);
4606         }
4607         if (decl_modifiers & DM_NAKED) {
4608                 /* TRUE if the declaration includes the Microsoft
4609                    __declspec(naked) specifier. */
4610                 set_irg_additional_property(irg, mtp_property_naked);
4611         }
4612         if (decl_modifiers & DM_FORCEINLINE) {
4613                 /* TRUE if the declaration includes the
4614                    Microsoft __forceinline specifier. */
4615                 set_irg_inline_property(irg, irg_inline_forced);
4616         }
4617         if (decl_modifiers & DM_NOINLINE) {
4618                 /* TRUE if the declaration includes the Microsoft
4619                    __declspec(noinline) specifier. */
4620                 set_irg_inline_property(irg, irg_inline_forbidden);
4621         }
4622 }
4623
4624 static void create_function(declaration_t *declaration)
4625 {
4626         ir_entity *function_entity = get_function_entity(declaration);
4627
4628         if(declaration->init.statement == NULL)
4629                 return;
4630
4631         current_function_decl = declaration;
4632         current_function_name = NULL;
4633         current_funcsig       = NULL;
4634
4635         assert(imature_blocks == NULL);
4636         imature_blocks = NEW_ARR_F(ir_node*, 0);
4637
4638         int       n_local_vars = get_function_n_local_vars(declaration);
4639         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
4640         ir_node  *first_block  = get_cur_block();
4641
4642         /* set inline flags */
4643         if (declaration->is_inline)
4644         set_irg_inline_property(irg, irg_inline_recomended);
4645     handle_decl_modifier_irg(irg, declaration->modifiers);
4646
4647         next_value_number_function = 0;
4648         initialize_function_parameters(declaration);
4649
4650         statement_to_firm(declaration->init.statement);
4651
4652         ir_node *end_block = get_irg_end_block(irg);
4653
4654         /* do we have a return statement yet? */
4655         if(get_cur_block() != NULL) {
4656                 type_t *type = skip_typeref(declaration->type);
4657                 assert(is_type_function(type));
4658                 const function_type_t *func_type   = &type->function;
4659                 const type_t          *return_type
4660                         = skip_typeref(func_type->return_type);
4661
4662                 ir_node *ret;
4663                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
4664                         ret = new_Return(get_store(), 0, NULL);
4665                 } else {
4666                         ir_mode *mode;
4667                         if(is_type_scalar(return_type)) {
4668                                 mode = get_ir_mode(func_type->return_type);
4669                         } else {
4670                                 mode = mode_P_data;
4671                         }
4672
4673                         ir_node *in[1];
4674                         /* §5.1.2.2.3 main implicitly returns 0 */
4675                         if (strcmp(declaration->symbol->string, "main") == 0) {
4676                                 in[0] = new_Const(mode, get_mode_null(mode));
4677                         } else {
4678                                 in[0] = new_Unknown(mode);
4679                         }
4680                         ret = new_Return(get_store(), 1, in);
4681                 }
4682                 add_immBlock_pred(end_block, ret);
4683         }
4684
4685         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
4686                 mature_immBlock(imature_blocks[i]);
4687         }
4688         DEL_ARR_F(imature_blocks);
4689         imature_blocks = NULL;
4690
4691         mature_immBlock(first_block);
4692         mature_immBlock(end_block);
4693
4694         irg_finalize_cons(irg);
4695
4696         /* finalize the frame type */
4697         ir_type *frame_type = get_irg_frame_type(irg);
4698         int      n          = get_compound_n_members(frame_type);
4699         int      align_all  = 4;
4700         int      offset     = 0;
4701         for(int i = 0; i < n; ++i) {
4702                 ir_entity *entity      = get_compound_member(frame_type, i);
4703                 ir_type   *entity_type = get_entity_type(entity);
4704
4705                 int align = get_type_alignment_bytes(entity_type);
4706                 if(align > align_all)
4707                         align_all = align;
4708                 int misalign = 0;
4709                 if(align > 0) {
4710                         misalign  = offset % align;
4711                         if(misalign > 0) {
4712                                 offset += align - misalign;
4713                         }
4714                 }
4715
4716                 set_entity_offset(entity, offset);
4717                 offset += get_type_size_bytes(entity_type);
4718         }
4719         set_type_size_bytes(frame_type, offset);
4720         set_type_alignment_bytes(frame_type, align_all);
4721
4722         irg_vrfy(irg);
4723 }
4724
4725 static void scope_to_firm(scope_t *scope)
4726 {
4727         /* first pass: create declarations */
4728         declaration_t *declaration = scope->declarations;
4729         for( ; declaration != NULL; declaration = declaration->next) {
4730                 if(declaration->namespc != NAMESPACE_NORMAL)
4731                         continue;
4732                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4733                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4734                         continue;
4735                 if(declaration->symbol == NULL)
4736                         continue;
4737
4738                 type_t *type = skip_typeref(declaration->type);
4739                 if(is_type_function(type)) {
4740                         get_function_entity(declaration);
4741                 } else {
4742                         create_global_variable(declaration);
4743                 }
4744         }
4745
4746         /* second pass: create code/initializers */
4747         declaration = scope->declarations;
4748         for( ; declaration != NULL; declaration = declaration->next) {
4749                 if(declaration->namespc != NAMESPACE_NORMAL)
4750                         continue;
4751                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4752                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4753                         continue;
4754                 if(declaration->symbol == NULL)
4755                         continue;
4756
4757                 type_t *type = declaration->type;
4758                 if(type->kind == TYPE_FUNCTION) {
4759                         create_function(declaration);
4760                 } else {
4761                         assert(declaration->declaration_kind
4762                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
4763                         current_ir_graph = get_const_code_irg();
4764                         create_declaration_initializer(declaration);
4765                 }
4766         }
4767 }
4768
4769 void init_ast2firm(void)
4770 {
4771         obstack_init(&asm_obst);
4772         init_atomic_modes();
4773
4774         /* create idents for all known runtime functions */
4775         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
4776                 predef_idents[rts_data[i].id] = new_id_from_str(rts_data[i].name);
4777         }
4778 }
4779
4780 static void init_ir_types(void)
4781 {
4782         static int ir_types_initialized = 0;
4783         if(ir_types_initialized)
4784                 return;
4785         ir_types_initialized = 1;
4786
4787         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
4788         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
4789         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
4790
4791         ir_type_int        = get_ir_type(type_int);
4792         ir_type_const_char = get_ir_type(type_const_char);
4793         ir_type_wchar_t    = get_ir_type(type_wchar_t);
4794         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
4795                                                        type in firm */
4796
4797         type_void->base.firm_type = ir_type_void;
4798 }
4799
4800 void exit_ast2firm(void)
4801 {
4802         obstack_free(&asm_obst, NULL);
4803 }
4804
4805 void translation_unit_to_firm(translation_unit_t *unit)
4806 {
4807         /* just to be sure */
4808         continue_label      = NULL;
4809         break_label         = NULL;
4810         current_switch_cond = NULL;
4811
4812         init_ir_types();
4813
4814         scope_to_firm(&unit->scope);
4815 }