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 #include <limits.h>
  26
  27 #include <libfirm/firm.h>
  28 #include <libfirm/adt/obst.h>
  29 #include <libfirm/be.h>
  30
  31 #include "ast2firm.h"
  32
  33 #include "adt/error.h"
  34 #include "adt/array.h"
  35 #include "symbol_t.h"
  36 #include "token_t.h"
  37 #include "type_t.h"
  38 #include "ast_t.h"
  39 #include "entity_t.h"
  40 #include "parser.h"
  41 #include "diagnostic.h"
  42 #include "lang_features.h"
  43 #include "types.h"
  44 #include "walk_statements.h"
  45 #include "warning.h"
  46 #include "entitymap_t.h"
  47 #include "driver/firm_opt.h"
  48 #include "driver/firm_cmdline.h"
  49
  50 /* some idents needed for name mangling */
  51 static ident *id_underscore;
  52 static ident *id_imp;
  53
  54 static ir_type *ir_type_const_char;
  55 static ir_type *ir_type_wchar_t;
  56 static ir_type *ir_type_void;
  57 static ir_type *ir_type_int;
  58
  59 static int        next_value_number_function;
  60 static ir_node   *continue_label;
  61 static ir_node   *break_label;
  62 static ir_node   *current_switch_cond;
  63 static bool       saw_default_label;
  64 static label_t  **all_labels;
  65 static entity_t **inner_functions;
  66 static ir_node   *ijmp_list;
  67 static bool       constant_folding;
  68
  69 extern bool       have_const_functions;
  70
  71 static const entity_t     *current_function_entity;
  72 static ir_node            *current_function_name;
  73 static ir_node            *current_funcsig;
  74 static switch_statement_t *current_switch;
  75 static ir_graph           *current_function;
  76
  77 static entitymap_t  entitymap;
  78
  79 static struct obstack asm_obst;
  80
  81 typedef enum declaration_kind_t {
  82         DECLARATION_KIND_UNKNOWN,
  83         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  84         DECLARATION_KIND_GLOBAL_VARIABLE,
  85         DECLARATION_KIND_LOCAL_VARIABLE,
  86         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  87         DECLARATION_KIND_FUNCTION,
  88         DECLARATION_KIND_COMPOUND_MEMBER,
  89         DECLARATION_KIND_INNER_FUNCTION
  90 } declaration_kind_t;
  91
  92 static ir_type *get_ir_type(type_t *type);
  93 static ir_type *get_ir_type_incomplete(type_t *type);
  94
  95 static void enqueue_inner_function(entity_t *entity)
  96 {
  97         ARR_APP1(entity_t*, inner_functions, entity);
  98 }
  99
 100 static entity_t *next_inner_function(void)
 101 {
 102         int len = ARR_LEN(inner_functions);
 103         if (len == 0)
 104                 return NULL;
 105
 106         entity_t *entity = inner_functions[len-1];
 107         ARR_SHRINKLEN(inner_functions, len-1);
 108
 109         return entity;
 110 }
 111
 112 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 113 {
 114         const variable_t *variable = get_irg_loc_description(irg, pos);
 115
 116         if (variable != NULL) {
 117                 warningf(&variable->base.base.source_position,
 118                          "variable '%#T' might be used uninitialized",
 119                          variable->base.type, variable->base.base.symbol);
 120         }
 121         return new_r_Unknown(irg, mode);
 122 }
 123
 124 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 125 {
 126         const source_position_t *pos = (const source_position_t*) dbg;
 127         if (pos == NULL)
 128                 return 0;
 129         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 130                                    pos->linenr);
 131 }
 132
 133 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 134 {
 135         const source_position_t *pos = (const source_position_t*) dbg;
 136         if (pos == NULL)
 137                 return NULL;
 138         if (line != NULL)
 139                 *line = pos->linenr;
 140         return pos->input_name;
 141 }
 142
 143 static dbg_info *get_dbg_info(const source_position_t *pos)
 144 {
 145         return (dbg_info*) pos;
 146 }
 147
 148 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
 149
 150 static ir_mode *mode_int, *mode_uint;
 151
 152 static ir_node *_expression_to_firm(const expression_t *expression);
 153 static ir_node *expression_to_firm(const expression_t *expression);
 154 static inline ir_mode *get_ir_mode(type_t *type);
 155 static void create_local_declaration(entity_t *entity);
 156
 157 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 158 {
 159         unsigned flags = get_atomic_type_flags(kind);
 160         unsigned size  = get_atomic_type_size(kind);
 161         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 162                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 163                 char            name[64];
 164                 ir_mode_sort    sort;
 165                 unsigned        bit_size     = size * 8;
 166                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 167                 ir_mode_arithmetic arithmetic;
 168                 unsigned        modulo_shift;
 169
 170                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 171                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 172                         snprintf(name, sizeof(name), "i%s%u", is_signed ? "" : "u", bit_size);
 173                         sort         = irms_int_number;
 174                         arithmetic   = irma_twos_complement;
 175                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 176                 } else {
 177                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 178                         snprintf(name, sizeof(name), "f%u", bit_size);
 179                         sort         = irms_float_number;
 180                         arithmetic   = irma_ieee754;
 181                         modulo_shift = 0;
 182                 }
 183                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 184                                    modulo_shift);
 185         }
 186
 187         return NULL;
 188 }
 189
 190 /**
 191  * Initialises the atomic modes depending on the machine size.
 192  */
 193 static void init_atomic_modes(void)
 194 {
 195         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 196                 _atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 197         }
 198         mode_int  = _atomic_modes[ATOMIC_TYPE_INT];
 199         mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
 200
 201         /* there's no real void type in firm */
 202         _atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 203
 204         /* initialize pointer modes */
 205         char            name[64];
 206         ir_mode_sort    sort         = irms_reference;
 207         unsigned        bit_size     = machine_size;
 208         bool            is_signed    = 0;
 209         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 210         unsigned        modulo_shift
 211                 = bit_size < machine_size ? machine_size : bit_size;
 212
 213         snprintf(name, sizeof(name), "p%u", machine_size);
 214         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 215                                         modulo_shift);
 216
 217         set_reference_mode_signed_eq(ptr_mode, _atomic_modes[get_intptr_kind()]);
 218         set_reference_mode_unsigned_eq(ptr_mode, _atomic_modes[get_uintptr_kind()]);
 219
 220         /* Hmm, pointers should be machine size */
 221         set_modeP_data(ptr_mode);
 222         set_modeP_code(ptr_mode);
 223 }
 224
 225 static unsigned get_compound_type_size(compound_type_t *type)
 226 {
 227         ir_type *irtype = get_ir_type((type_t*) type);
 228         return get_type_size_bytes(irtype);
 229 }
 230
 231 static unsigned get_array_type_size(array_type_t *type)
 232 {
 233         assert(!type->is_vla);
 234         ir_type *irtype = get_ir_type((type_t*) type);
 235         return get_type_size_bytes(irtype);
 236 }
 237
 238
 239 static unsigned get_type_size_const(type_t *type)
 240 {
 241         switch(type->kind) {
 242         case TYPE_ERROR:
 243                 panic("error type occurred");
 244         case TYPE_ATOMIC:
 245                 return get_atomic_type_size(type->atomic.akind);
 246         case TYPE_COMPLEX:
 247                 return 2 * get_atomic_type_size(type->complex.akind);
 248         case TYPE_IMAGINARY:
 249                 return get_atomic_type_size(type->imaginary.akind);
 250         case TYPE_ENUM:
 251                 return get_mode_size_bytes(mode_int);
 252         case TYPE_COMPOUND_UNION:
 253         case TYPE_COMPOUND_STRUCT:
 254                 return get_compound_type_size(&type->compound);
 255         case TYPE_FUNCTION:
 256                 /* just a pointer to the function */
 257                 return get_mode_size_bytes(mode_P_code);
 258         case TYPE_POINTER:
 259                 return get_mode_size_bytes(mode_P_data);
 260         case TYPE_ARRAY:
 261                 return get_array_type_size(&type->array);
 262         case TYPE_BUILTIN:
 263                 return get_type_size_const(type->builtin.real_type);
 264         case TYPE_BITFIELD:
 265                 panic("type size of bitfield request");
 266         case TYPE_TYPEDEF:
 267         case TYPE_TYPEOF:
 268         case TYPE_INVALID:
 269                 break;
 270         }
 271         panic("Trying to determine size of invalid type");
 272 }
 273
 274 static ir_node *get_type_size(type_t *type)
 275 {
 276         type = skip_typeref(type);
 277
 278         if (is_type_array(type) && type->array.is_vla) {
 279                 ir_node *size_node = type->array.size_node;
 280                 if (size_node == NULL) {
 281                         size_node = expression_to_firm(type->array.size_expression);
 282                         assert(!is_Const(size_node));
 283                         type->array.size_node = size_node;
 284                 }
 285
 286                 ir_node *elem_size = get_type_size(type->array.element_type);
 287                 ir_mode *mode      = get_irn_mode(size_node);
 288                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 289                 return real_size;
 290         }
 291
 292         ir_mode *mode = get_ir_mode(type_size_t);
 293         symconst_symbol sym;
 294         sym.type_p = get_ir_type(type);
 295         return new_SymConst(mode, sym, symconst_type_size);
 296 }
 297
 298 static unsigned count_parameters(const function_type_t *function_type)
 299 {
 300         unsigned count = 0;
 301
 302         function_parameter_t *parameter = function_type->parameters;
 303         for ( ; parameter != NULL; parameter = parameter->next) {
 304                 ++count;
 305         }
 306
 307         return count;
 308 }
 309
 310 /**
 311  * Creates a Firm type for an atomic type
 312  */
 313 static ir_type *create_atomic_type(const atomic_type_t *type)
 314 {
 315         atomic_type_kind_t  kind   = type->akind;
 316         ir_mode            *mode   = _atomic_modes[kind];
 317         ident              *id     = get_mode_ident(mode);
 318         ir_type            *irtype = new_type_primitive(id, mode);
 319
 320         set_type_alignment_bytes(irtype, type->base.alignment);
 321
 322         return irtype;
 323 }
 324
 325 /**
 326  * Creates a Firm type for a complex type
 327  */
 328 static ir_type *create_complex_type(const complex_type_t *type)
 329 {
 330         atomic_type_kind_t  kind = type->akind;
 331         ir_mode            *mode = _atomic_modes[kind];
 332         ident              *id   = get_mode_ident(mode);
 333
 334         (void) id;
 335
 336         /* FIXME: finish the array */
 337         return NULL;
 338 }
 339
 340 /**
 341  * Creates a Firm type for an imaginary type
 342  */
 343 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 344 {
 345         atomic_type_kind_t  kind      = type->akind;
 346         ir_mode            *mode      = _atomic_modes[kind];
 347         ident              *id        = get_mode_ident(mode);
 348         ir_type            *irtype    = new_type_primitive(id, mode);
 349
 350         set_type_alignment_bytes(irtype, type->base.alignment);
 351
 352         return irtype;
 353 }
 354
 355 /**
 356  * return type of a parameter (and take transparent union gnu extension into
 357  * account)
 358  */
 359 static type_t *get_parameter_type(type_t *type)
 360 {
 361         type = skip_typeref(type);
 362         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 363                 compound_t *compound = type->compound.compound;
 364                 type                 = compound->members.entities->declaration.type;
 365         }
 366
 367         return type;
 368 }
 369
 370 static ir_type *create_method_type(const function_type_t *function_type)
 371 {
 372         type_t  *return_type  = skip_typeref(function_type->return_type);
 373
 374         ident   *id           = id_unique("functiontype.%u");
 375         int      n_parameters = count_parameters(function_type);
 376         int      n_results    = return_type == type_void ? 0 : 1;
 377         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 378
 379         if (return_type != type_void) {
 380                 ir_type *restype = get_ir_type(return_type);
 381                 set_method_res_type(irtype, 0, restype);
 382         }
 383
 384         function_parameter_t *parameter = function_type->parameters;
 385         int                   n         = 0;
 386         for ( ; parameter != NULL; parameter = parameter->next) {
 387                 type_t  *type     = get_parameter_type(parameter->type);
 388                 ir_type *p_irtype = get_ir_type(type);
 389                 set_method_param_type(irtype, n, p_irtype);
 390                 ++n;
 391         }
 392
 393         if (function_type->variadic || function_type->unspecified_parameters) {
 394                 set_method_variadicity(irtype, variadicity_variadic);
 395         }
 396
 397         unsigned cc = get_method_calling_convention(irtype);
 398         switch (function_type->calling_convention) {
 399         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 400         case CC_CDECL:
 401 is_cdecl:
 402                 set_method_calling_convention(irtype, SET_CDECL(cc));
 403                 break;
 404
 405         case CC_STDCALL:
 406                 if (function_type->variadic || function_type->unspecified_parameters)
 407                         goto is_cdecl;
 408
 409                 /* only non-variadic function can use stdcall, else use cdecl */
 410                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 411                 break;
 412
 413         case CC_FASTCALL:
 414                 if (function_type->variadic || function_type->unspecified_parameters)
 415                         goto is_cdecl;
 416                 /* only non-variadic function can use fastcall, else use cdecl */
 417                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 418                 break;
 419
 420         case CC_THISCALL:
 421                 /* Hmm, leave default, not accepted by the parser yet. */
 422                 break;
 423         }
 424         return irtype;
 425 }
 426
 427 static ir_type *create_pointer_type(pointer_type_t *type)
 428 {
 429         type_t   *points_to    = type->points_to;
 430         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 431         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 432                                                   ir_points_to, mode_P_data);
 433
 434         return ir_type;
 435 }
 436
 437 static ir_type *create_array_type(array_type_t *type)
 438 {
 439         type_t  *element_type    = type->element_type;
 440         ir_type *ir_element_type = get_ir_type(element_type);
 441
 442         ident    *id      = id_unique("array.%u");
 443         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 444
 445         const int align = get_type_alignment_bytes(ir_element_type);
 446         set_type_alignment_bytes(ir_type, align);
 447
 448         if (type->size_constant) {
 449                 int n_elements = type->size;
 450
 451                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 452
 453                 size_t elemsize = get_type_size_bytes(ir_element_type);
 454                 if (elemsize % align > 0) {
 455                         elemsize += align - (elemsize % align);
 456                 }
 457                 set_type_size_bytes(ir_type, n_elements * elemsize);
 458         } else {
 459                 set_array_lower_bound_int(ir_type, 0, 0);
 460         }
 461         set_type_state(ir_type, layout_fixed);
 462
 463         return ir_type;
 464 }
 465
 466 /**
 467  * Return the signed integer type of size bits.
 468  *
 469  * @param size   the size
 470  */
 471 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 472                                                  unsigned size)
 473 {
 474         static ir_mode *s_modes[64 + 1] = {NULL, };
 475         ir_type *res;
 476         ir_mode *mode;
 477
 478         if (size <= 0 || size > 64)
 479                 return NULL;
 480
 481         mode = s_modes[size];
 482         if (mode == NULL) {
 483                 char name[32];
 484
 485                 snprintf(name, sizeof(name), "bf_I%u", size);
 486                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 487                                    size <= 32 ? 32 : size );
 488                 s_modes[size] = mode;
 489         }
 490
 491         char name[32];
 492         snprintf(name, sizeof(name), "I%u", size);
 493         ident *id = new_id_from_str(name);
 494         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 495         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 496         set_primitive_base_type(res, base_tp);
 497
 498         return res;
 499 }
 500
 501 /**
 502  * Return the unsigned integer type of size bits.
 503  *
 504  * @param size   the size
 505  */
 506 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 507                                                    unsigned size)
 508 {
 509         static ir_mode *u_modes[64 + 1] = {NULL, };
 510         ir_type *res;
 511         ir_mode *mode;
 512
 513         if (size <= 0 || size > 64)
 514                 return NULL;
 515
 516         mode = u_modes[size];
 517         if (mode == NULL) {
 518                 char name[32];
 519
 520                 snprintf(name, sizeof(name), "bf_U%u", size);
 521                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 522                                    size <= 32 ? 32 : size );
 523                 u_modes[size] = mode;
 524         }
 525
 526         char name[32];
 527
 528         snprintf(name, sizeof(name), "U%u", size);
 529         ident *id = new_id_from_str(name);
 530         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 531         res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 532         set_primitive_base_type(res, base_tp);
 533
 534         return res;
 535 }
 536
 537 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 538 {
 539         type_t *base = skip_typeref(type->base_type);
 540         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 541         ir_type *irbase = get_ir_type(base);
 542
 543         unsigned size = type->bit_size;
 544
 545         assert(!is_type_float(base));
 546         if (is_type_signed(base)) {
 547                 return get_signed_int_type_for_bit_size(irbase, size);
 548         } else {
 549                 return get_unsigned_int_type_for_bit_size(irbase, size);
 550         }
 551 }
 552
 553 #define INVALID_TYPE ((ir_type_ptr)-1)
 554
 555 enum {
 556         COMPOUND_IS_STRUCT = false,
 557         COMPOUND_IS_UNION  = true
 558 };
 559
 560 /**
 561  * Construct firm type from ast struct type.
 562  *
 563  * As anonymous inner structs get flattened to a single firm type, we might get
 564  * irtype, outer_offset and out_align passed (they represent the position of
 565  * the anonymous inner struct inside the resulting firm struct)
 566  */
 567 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 568                                      size_t *outer_offset, size_t *outer_align,
 569                                      bool incomplete, bool is_union)
 570 {
 571         compound_t *compound = type->compound;
 572
 573         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 574                 return compound->irtype;
 575         }
 576
 577         size_t align_all  = 1;
 578         size_t offset     = 0;
 579         size_t bit_offset = 0;
 580         size_t size       = 0;
 581
 582         if (irtype == NULL) {
 583                 symbol_t *symbol = compound->base.symbol;
 584                 ident    *id;
 585                 if (symbol != NULL) {
 586                         id = new_id_from_str(symbol->string);
 587                 } else {
 588                         if (is_union) {
 589                                 id = id_unique("__anonymous_union.%u");
 590                         } else {
 591                                 id = id_unique("__anonymous_struct.%u");
 592                         }
 593                 }
 594                 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 595
 596                 if (is_union) {
 597                         irtype = new_d_type_union(id, dbgi);
 598                 } else {
 599                         irtype = new_d_type_struct(id, dbgi);
 600                 }
 601
 602                 compound->irtype_complete = false;
 603                 compound->irtype          = irtype;
 604         } else {
 605                 offset    = *outer_offset;
 606                 align_all = *outer_align;
 607         }
 608
 609         if (incomplete)
 610                 return irtype;
 611
 612         compound->irtype_complete = true;
 613
 614         entity_t *entry = compound->members.entities;
 615         for ( ; entry != NULL; entry = entry->base.next) {
 616                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 617                         continue;
 618
 619                 size_t prev_offset = offset;
 620
 621                 symbol_t *symbol     = entry->base.symbol;
 622                 type_t   *entry_type = skip_typeref(entry->declaration.type);
 623                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 624
 625                 ident    *ident;
 626                 if (symbol != NULL) {
 627                         ident = new_id_from_str(symbol->string);
 628                 } else {
 629                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 630                                 create_compound_type(&entry_type->compound, irtype, &offset,
 631                                                      &align_all, false, COMPOUND_IS_STRUCT);
 632                                 goto finished_member;
 633                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 634                                 create_compound_type(&entry_type->compound, irtype, &offset,
 635                                                      &align_all, false, COMPOUND_IS_UNION);
 636                                 goto finished_member;
 637                         } else {
 638                                 assert(entry_type->kind == TYPE_BITFIELD);
 639                         }
 640                         ident = id_unique("anon.%u");
 641                 }
 642
 643                 ir_type *base_irtype;
 644                 if (entry_type->kind == TYPE_BITFIELD) {
 645                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 646                 } else {
 647                         base_irtype = get_ir_type(entry_type);
 648                 }
 649
 650                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 651                 size_t misalign        = offset % entry_alignment;
 652
 653                 ir_type   *entry_irtype = get_ir_type(entry_type);
 654                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 655
 656                 size_t base;
 657                 size_t bits_remainder;
 658                 if (entry_type->kind == TYPE_BITFIELD) {
 659                         size_t size_bits      = entry_type->bitfield.bit_size;
 660                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 661
 662                         if (size_bits > rest_size_bits) {
 663                                 /* start a new bucket */
 664                                 offset     += entry_alignment - misalign;
 665                                 bit_offset  = 0;
 666
 667                                 base           = offset;
 668                                 bits_remainder = 0;
 669                         } else {
 670                                 /* put into current bucket */
 671                                 base           = offset - misalign;
 672                                 bits_remainder = misalign * 8 + bit_offset;
 673                         }
 674
 675                         offset     += size_bits / 8;
 676                         bit_offset  = bit_offset + (size_bits % 8);
 677                 } else {
 678                         size_t entry_size = get_type_size_bytes(base_irtype);
 679                         if (misalign > 0 || bit_offset > 0)
 680                                 offset += entry_alignment - misalign;
 681
 682                         base           = offset;
 683                         bits_remainder = 0;
 684                         offset        += entry_size;
 685                         bit_offset     = 0;
 686                 }
 687
 688                 if (entry_alignment > align_all) {
 689                         if (entry_alignment % align_all != 0) {
 690                                 panic("uneven alignments not supported yet");
 691                         }
 692                         align_all = entry_alignment;
 693                 }
 694
 695                 set_entity_offset(entity, base);
 696                 set_entity_offset_bits_remainder(entity,
 697                                                  (unsigned char) bits_remainder);
 698                 //add_struct_member(irtype, entity);
 699                 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
 700                 assert(entry->compound_member.entity == NULL);
 701                 entry->compound_member.entity = entity;
 702
 703 finished_member:
 704                 if (is_union) {
 705                         size_t entry_size = offset - prev_offset;
 706                         if (entry_size > size) {
 707                                 size = entry_size;
 708                         }
 709                         offset     = 0;
 710                         bit_offset = 0;
 711                 }
 712         }
 713
 714         if (!is_union) {
 715                 size = offset;
 716         }
 717
 718         size_t misalign = offset % align_all;
 719         if (misalign > 0 || bit_offset > 0) {
 720                 size += align_all - misalign;
 721         }
 722
 723         if (outer_offset != NULL) {
 724                 if (!is_union) {
 725                         *outer_offset = offset;
 726                 } else {
 727                         *outer_offset += size;
 728                 }
 729
 730                 if (align_all > *outer_align) {
 731                         if (align_all % *outer_align != 0) {
 732                                 panic("uneven alignments not supported yet");
 733                         }
 734                         *outer_align = align_all;
 735                 }
 736         } else {
 737                 set_type_alignment_bytes(irtype, align_all);
 738                 set_type_size_bytes(irtype, size);
 739                 set_type_state(irtype, layout_fixed);
 740         }
 741
 742         return irtype;
 743 }
 744
 745 static ir_type *create_enum_type(enum_type_t *const type)
 746 {
 747         type->base.firm_type = ir_type_int;
 748
 749         ir_mode *const mode    = mode_int;
 750         tarval  *const one     = get_mode_one(mode);
 751         tarval  *      tv_next = get_tarval_null(mode);
 752
 753         bool constant_folding_old = constant_folding;
 754         constant_folding = true;
 755
 756         enum_t   *enume = type->enume;
 757         entity_t *entry = enume->base.next;
 758         for (; entry != NULL; entry = entry->base.next) {
 759                 if (entry->kind != ENTITY_ENUM_VALUE)
 760                         break;
 761
 762                 expression_t *const init = entry->enum_value.value;
 763                 if (init != NULL) {
 764                         ir_node *const cnst = expression_to_firm(init);
 765                         if (!is_Const(cnst)) {
 766                                 panic("couldn't fold constant");
 767                         }
 768                         tv_next = get_Const_tarval(cnst);
 769                 }
 770                 entry->enum_value.tv = tv_next;
 771                 tv_next = tarval_add(tv_next, one);
 772         }
 773
 774         constant_folding = constant_folding_old;
 775
 776         return ir_type_int;
 777 }
 778
 779 static ir_type *get_ir_type_incomplete(type_t *type)
 780 {
 781         assert(type != NULL);
 782         type = skip_typeref(type);
 783
 784         if (type->base.firm_type != NULL) {
 785                 assert(type->base.firm_type != INVALID_TYPE);
 786                 return type->base.firm_type;
 787         }
 788
 789         switch (type->kind) {
 790         case TYPE_COMPOUND_STRUCT:
 791                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 792                                             true, COMPOUND_IS_STRUCT);
 793         case TYPE_COMPOUND_UNION:
 794                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 795                                             true, COMPOUND_IS_UNION);
 796         default:
 797                 return get_ir_type(type);
 798         }
 799 }
 800
 801 static ir_type *get_ir_type(type_t *type)
 802 {
 803         assert(type != NULL);
 804
 805         type = skip_typeref(type);
 806
 807         if (type->base.firm_type != NULL) {
 808                 assert(type->base.firm_type != INVALID_TYPE);
 809                 return type->base.firm_type;
 810         }
 811
 812         ir_type *firm_type = NULL;
 813         switch (type->kind) {
 814         case TYPE_ERROR:
 815                 /* Happens while constant folding, when there was an error */
 816                 return create_atomic_type(&type_void->atomic);
 817
 818         case TYPE_ATOMIC:
 819                 firm_type = create_atomic_type(&type->atomic);
 820                 break;
 821         case TYPE_COMPLEX:
 822                 firm_type = create_complex_type(&type->complex);
 823                 break;
 824         case TYPE_IMAGINARY:
 825                 firm_type = create_imaginary_type(&type->imaginary);
 826                 break;
 827         case TYPE_FUNCTION:
 828                 firm_type = create_method_type(&type->function);
 829                 break;
 830         case TYPE_POINTER:
 831                 firm_type = create_pointer_type(&type->pointer);
 832                 break;
 833         case TYPE_ARRAY:
 834                 firm_type = create_array_type(&type->array);
 835                 break;
 836         case TYPE_COMPOUND_STRUCT:
 837                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 838                                                  false, COMPOUND_IS_STRUCT);
 839                 break;
 840         case TYPE_COMPOUND_UNION:
 841                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 842                                                  false, COMPOUND_IS_UNION);
 843                 break;
 844         case TYPE_ENUM:
 845                 firm_type = create_enum_type(&type->enumt);
 846                 break;
 847         case TYPE_BUILTIN:
 848                 firm_type = get_ir_type(type->builtin.real_type);
 849                 break;
 850         case TYPE_BITFIELD:
 851                 firm_type = create_bitfield_type(&type->bitfield);
 852                 break;
 853
 854         case TYPE_TYPEOF:
 855         case TYPE_TYPEDEF:
 856         case TYPE_INVALID:
 857                 break;
 858         }
 859         if (firm_type == NULL)
 860                 panic("unknown type found");
 861
 862         type->base.firm_type = firm_type;
 863         return firm_type;
 864 }
 865
 866 static inline ir_mode *get_ir_mode(type_t *type)
 867 {
 868         ir_type *irtype = get_ir_type(type);
 869
 870         /* firm doesn't report a mode for arrays somehow... */
 871         if (is_Array_type(irtype)) {
 872                 return mode_P_data;
 873         }
 874
 875         ir_mode *mode = get_type_mode(irtype);
 876         assert(mode != NULL);
 877         return mode;
 878 }
 879
 880 /** Names of the runtime functions. */
 881 static const struct {
 882         int        id;           /**< the rts id */
 883         int        n_res;        /**< number of return values */
 884         const char *name;        /**< the name of the rts function */
 885         int        n_params;     /**< number of parameters */
 886         unsigned   flags;        /**< language flags */
 887 } rts_data[] = {
 888         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 889         { rts_abort,      0, "abort",        0, _C89 },
 890         { rts_alloca,     1, "alloca",       1, _ALL },
 891         { rts_abs,        1, "abs",          1, _C89 },
 892         { rts_labs,       1, "labs",         1, _C89 },
 893         { rts_llabs,      1, "llabs",        1, _C99 },
 894         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 895
 896         { rts_fabs,       1, "fabs",         1, _C89 },
 897         { rts_sqrt,       1, "sqrt",         1, _C89 },
 898         { rts_cbrt,       1, "cbrt",         1, _C99 },
 899         { rts_exp,        1, "exp",          1, _C89 },
 900         { rts_exp2,       1, "exp2",         1, _C89 },
 901         { rts_exp10,      1, "exp10",        1, _GNUC },
 902         { rts_log,        1, "log",          1, _C89 },
 903         { rts_log2,       1, "log2",         1, _C89 },
 904         { rts_log10,      1, "log10",        1, _C89 },
 905         { rts_pow,        1, "pow",          2, _C89 },
 906         { rts_sin,        1, "sin",          1, _C89 },
 907         { rts_cos,        1, "cos",          1, _C89 },
 908         { rts_tan,        1, "tan",          1, _C89 },
 909         { rts_asin,       1, "asin",         1, _C89 },
 910         { rts_acos,       1, "acos",         1, _C89 },
 911         { rts_atan,       1, "atan",         1, _C89 },
 912         { rts_sinh,       1, "sinh",         1, _C89 },
 913         { rts_cosh,       1, "cosh",         1, _C89 },
 914         { rts_tanh,       1, "tanh",         1, _C89 },
 915
 916         { rts_fabsf,      1, "fabsf",        1, _C99 },
 917         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 918         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 919         { rts_expf,       1, "expf",         1, _C99 },
 920         { rts_exp2f,      1, "exp2f",        1, _C99 },
 921         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 922         { rts_logf,       1, "logf",         1, _C99 },
 923         { rts_log2f,      1, "log2f",        1, _C99 },
 924         { rts_log10f,     1, "log10f",       1, _C99 },
 925         { rts_powf,       1, "powf",         2, _C99 },
 926         { rts_sinf,       1, "sinf",         1, _C99 },
 927         { rts_cosf,       1, "cosf",         1, _C99 },
 928         { rts_tanf,       1, "tanf",         1, _C99 },
 929         { rts_asinf,      1, "asinf",        1, _C99 },
 930         { rts_acosf,      1, "acosf",        1, _C99 },
 931         { rts_atanf,      1, "atanf",        1, _C99 },
 932         { rts_sinhf,      1, "sinhf",        1, _C99 },
 933         { rts_coshf,      1, "coshf",        1, _C99 },
 934         { rts_tanhf,      1, "tanhf",        1, _C99 },
 935
 936         { rts_fabsl,      1, "fabsl",        1, _C99 },
 937         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 938         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 939         { rts_expl,       1, "expl",         1, _C99 },
 940         { rts_exp2l,      1, "exp2l",        1, _C99 },
 941         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 942         { rts_logl,       1, "logl",         1, _C99 },
 943         { rts_log2l,      1, "log2l",        1, _C99 },
 944         { rts_log10l,     1, "log10l",       1, _C99 },
 945         { rts_powl,       1, "powl",         2, _C99 },
 946         { rts_sinl,       1, "sinl",         1, _C99 },
 947         { rts_cosl,       1, "cosl",         1, _C99 },
 948         { rts_tanl,       1, "tanl",         1, _C99 },
 949         { rts_asinl,      1, "asinl",        1, _C99 },
 950         { rts_acosl,      1, "acosl",        1, _C99 },
 951         { rts_atanl,      1, "atanl",        1, _C99 },
 952         { rts_sinhl,      1, "sinhl",        1, _C99 },
 953         { rts_coshl,      1, "coshl",        1, _C99 },
 954         { rts_tanhl,      1, "tanhl",        1, _C99 },
 955
 956         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 957         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 958         { rts_strcmp,     1, "strcmp",       2, _C89 },
 959         { rts_strncmp,    1, "strncmp",      3, _C89 }
 960 };
 961
 962 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 963
 964 /**
 965  * Mangles an entity linker (ld) name for win32 usage.
 966  *
 967  * @param ent          the entity to be mangled
 968  * @param declaration  the declaration
 969  */
 970 static ident *create_ld_ident_win32(ir_entity *irentity, entity_t *entity)
 971 {
 972         ident *id;
 973
 974         if (is_Method_type(get_entity_type(irentity)))
 975                 id = decorate_win32_c_fkt(irentity, get_entity_ident(irentity));
 976         else {
 977                 /* always add an underscore in win32 */
 978                 id = mangle(id_underscore, get_entity_ident(irentity));
 979         }
 980
 981         assert(is_declaration(entity));
 982         decl_modifiers_t decl_modifiers = entity->declaration.modifiers;
 983         if (decl_modifiers & DM_DLLIMPORT) {
 984                 /* add prefix for imported symbols */
 985                 id = mangle(id_imp, id);
 986         }
 987         return id;
 988 }
 989
 990 /**
 991  * Mangles an entity linker (ld) name for Linux ELF usage.
 992  *
 993  * @param ent          the entity to be mangled
 994  * @param declaration  the declaration
 995  */
 996 static ident *create_ld_ident_linux_elf(ir_entity *irentity, entity_t *entity)
 997 {
 998         (void) entity;
 999         return get_entity_ident(irentity);
1000 }
1001
1002 /**
1003  * Mangles an entity linker (ld) name for Mach-O usage.
1004  *
1005  * @param ent          the entity to be mangled
1006  * @param declaration  the declaration
1007  */
1008 static ident *create_ld_ident_macho(ir_entity *irentity, entity_t *entity)
1009 {
1010         (void) entity;
1011         ident *id = mangle(id_underscore, get_entity_ident(irentity));
1012         return id;
1013 }
1014
1015 typedef ident* (*create_ld_ident_func)(ir_entity *irentity, entity_t *entity);
1016 create_ld_ident_func create_ld_ident = create_ld_ident_linux_elf;
1017
1018 /**
1019  * Handle GNU attributes for entities
1020  *
1021  * @param ent   the entity
1022  * @param decl  the routine declaration
1023  */
1024 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
1025 {
1026         assert(is_declaration(entity));
1027         decl_modifiers_t modifiers = entity->declaration.modifiers;
1028         if (modifiers & DM_PURE) {
1029                 /* TRUE if the declaration includes the GNU
1030                    __attribute__((pure)) specifier. */
1031                 set_entity_additional_property(irentity, mtp_property_pure);
1032         }
1033         if (modifiers & DM_CONST) {
1034                 set_entity_additional_property(irentity, mtp_property_const);
1035                 have_const_functions = true;
1036         }
1037         if (modifiers & DM_USED) {
1038                 /* TRUE if the declaration includes the GNU
1039                    __attribute__((used)) specifier. */
1040                 set_entity_stickyness(irentity, stickyness_sticky);
1041         }
1042 }
1043
1044 /**
1045  * Creates an entity representing a function.
1046  *
1047  * @param declaration  the function declaration
1048  */
1049 static ir_entity *get_function_entity(entity_t *entity)
1050 {
1051         assert(entity->kind == ENTITY_FUNCTION);
1052         if (entity->function.entity != NULL) {
1053                 return entity->function.entity;
1054         }
1055
1056         symbol_t *symbol = entity->base.symbol;
1057         ident    *id     = new_id_from_str(symbol->string);
1058
1059         ir_type   *global_type    = get_glob_type();
1060         ir_type   *ir_type_method = get_ir_type(entity->declaration.type);
1061         bool const has_body       = entity->function.statement != NULL;
1062
1063         /* already an entity defined? */
1064         ir_entity *irentity = entitymap_get(&entitymap, symbol);
1065         if (irentity != NULL) {
1066                 if (get_entity_visibility(irentity) == visibility_external_allocated
1067                                 && has_body) {
1068                         set_entity_visibility(irentity, visibility_external_visible);
1069                 }
1070                 goto entity_created;
1071         }
1072
1073         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1074         irentity             = new_d_entity(global_type, id, ir_type_method, dbgi);
1075         set_entity_ld_ident(irentity, create_ld_ident(irentity, entity));
1076
1077         handle_gnu_attributes_ent(irentity, entity);
1078
1079         /* static inline             => local
1080          * extern inline             => local
1081          * inline without definition => local
1082          * inline with definition    => external_visible */
1083         storage_class_tag_t const storage_class
1084                 = (storage_class_tag_t) entity->declaration.storage_class;
1085         bool                const is_inline     = entity->function.is_inline;
1086         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1087                 set_entity_visibility(irentity, visibility_external_visible);
1088         } else if (storage_class == STORAGE_CLASS_STATIC ||
1089                    (is_inline && has_body)) {
1090                 if (!has_body) {
1091                         /* this entity was declared, but is defined nowhere */
1092                         set_entity_peculiarity(irentity, peculiarity_description);
1093                 }
1094                 set_entity_visibility(irentity, visibility_local);
1095         } else if (has_body) {
1096                 set_entity_visibility(irentity, visibility_external_visible);
1097         } else {
1098                 set_entity_visibility(irentity, visibility_external_allocated);
1099         }
1100         set_entity_allocation(irentity, allocation_static);
1101
1102         /* We should check for file scope here, but as long as we compile C only
1103            this is not needed. */
1104         if (! firm_opt.freestanding) {
1105                 /* check for a known runtime function */
1106                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1107                         if (id != rts_idents[i])
1108                                 continue;
1109
1110                         /* ignore those rts functions not necessary needed for current mode */
1111                         if ((c_mode & rts_data[i].flags) == 0)
1112                                 continue;
1113                         assert(rts_entities[rts_data[i].id] == NULL);
1114                         rts_entities[rts_data[i].id] = irentity;
1115                 }
1116         }
1117
1118         entitymap_insert(&entitymap, symbol, irentity);
1119
1120 entity_created:
1121         entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1122         entity->function.entity  = irentity;
1123
1124         return irentity;
1125 }
1126
1127 /**
1128  * Creates a Const node representing a constant.
1129  */
1130 static ir_node *const_to_firm(const const_expression_t *cnst)
1131 {
1132         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1133         ir_mode  *mode = get_ir_mode(cnst->base.type);
1134
1135         char    buf[128];
1136         tarval *tv;
1137         size_t  len;
1138         if (mode_is_float(mode)) {
1139                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1140         } else {
1141                 if (mode_is_signed(mode)) {
1142                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1143                 } else {
1144                         len = snprintf(buf, sizeof(buf), "%llu",
1145                                        (unsigned long long) cnst->v.int_value);
1146                 }
1147                 tv = new_tarval_from_str(buf, len, mode);
1148         }
1149
1150         return new_d_Const(dbgi, mode, tv);
1151 }
1152
1153 /**
1154  * Creates a Const node representing a character constant.
1155  */
1156 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1157 {
1158         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1159         ir_mode  *mode = get_ir_mode(cnst->base.type);
1160
1161         long long int v = 0;
1162         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1163                 if (char_is_signed) {
1164                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1165                 } else {
1166                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1167                 }
1168         }
1169         char    buf[128];
1170         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1171         tarval *tv = new_tarval_from_str(buf, len, mode);
1172
1173         return new_d_Const(dbgi, mode, tv);
1174 }
1175
1176 /**
1177  * Creates a Const node representing a wide character constant.
1178  */
1179 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1180 {
1181         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1182         ir_mode  *mode = get_ir_mode(cnst->base.type);
1183
1184         long long int v = cnst->v.wide_character.begin[0];
1185
1186         char    buf[128];
1187         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1188         tarval *tv = new_tarval_from_str(buf, len, mode);
1189
1190         return new_d_Const(dbgi, mode, tv);
1191 }
1192
1193 /**
1194  * Creates a SymConst for a given entity.
1195  *
1196  * @param dbgi    debug info
1197  * @param mode    the (reference) mode for the SymConst
1198  * @param entity  the entity
1199  */
1200 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1201                               ir_entity *entity)
1202 {
1203         assert(entity != NULL);
1204         union symconst_symbol sym;
1205         sym.entity_p = entity;
1206         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1207 }
1208
1209 /**
1210  * Creates a SymConst node representing a string constant.
1211  *
1212  * @param src_pos    the source position of the string constant
1213  * @param id_prefix  a prefix for the name of the generated string constant
1214  * @param value      the value of the string constant
1215  */
1216 static ir_node *string_to_firm(const source_position_t *const src_pos,
1217                                const char *const id_prefix,
1218                                const string_t *const value)
1219 {
1220         ir_type  *const global_type = get_glob_type();
1221         dbg_info *const dbgi        = get_dbg_info(src_pos);
1222         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1223                                                        ir_type_const_char, dbgi);
1224
1225         ident     *const id     = id_unique(id_prefix);
1226         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1227         set_entity_ld_ident(entity, id);
1228         set_entity_variability(entity, variability_constant);
1229         set_entity_allocation(entity, allocation_static);
1230
1231         ir_type *const elem_type = ir_type_const_char;
1232         ir_mode *const mode      = get_type_mode(elem_type);
1233
1234         const char* const string = value->begin;
1235         const size_t      slen   = value->size;
1236
1237         set_array_lower_bound_int(type, 0, 0);
1238         set_array_upper_bound_int(type, 0, slen);
1239         set_type_size_bytes(type, slen);
1240         set_type_state(type, layout_fixed);
1241
1242         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1243         for (size_t i = 0; i < slen; ++i) {
1244                 tvs[i] = new_tarval_from_long(string[i], mode);
1245         }
1246
1247         set_array_entity_values(entity, tvs, slen);
1248         free(tvs);
1249
1250         return create_symconst(dbgi, mode_P_data, entity);
1251 }
1252
1253 /**
1254  * Creates a SymConst node representing a string literal.
1255  *
1256  * @param literal   the string literal
1257  */
1258 static ir_node *string_literal_to_firm(
1259                 const string_literal_expression_t* literal)
1260 {
1261         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1262                               &literal->value);
1263 }
1264
1265 /**
1266  * Creates a SymConst node representing a wide string literal.
1267  *
1268  * @param literal   the wide string literal
1269  */
1270 static ir_node *wide_string_literal_to_firm(
1271         const wide_string_literal_expression_t* const literal)
1272 {
1273         ir_type *const global_type = get_glob_type();
1274         ir_type *const elem_type   = ir_type_wchar_t;
1275         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1276         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1277                                                     elem_type, dbgi);
1278
1279         ident     *const id     = id_unique("Lstr.%u");
1280         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1281         set_entity_ld_ident(entity, id);
1282         set_entity_variability(entity, variability_constant);
1283         set_entity_allocation(entity, allocation_static);
1284
1285         ir_mode *const mode      = get_type_mode(elem_type);
1286
1287         const wchar_rep_t *const string = literal->value.begin;
1288         const size_t             slen   = literal->value.size;
1289
1290         set_array_lower_bound_int(type, 0, 0);
1291         set_array_upper_bound_int(type, 0, slen);
1292         set_type_size_bytes(type, slen);
1293         set_type_state(type, layout_fixed);
1294
1295         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1296         for (size_t i = 0; i < slen; ++i) {
1297                 tvs[i] = new_tarval_from_long(string[i], mode);
1298         }
1299
1300         set_array_entity_values(entity, tvs, slen);
1301         free(tvs);
1302
1303         return create_symconst(dbgi, mode_P_data, entity);
1304 }
1305
1306 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1307                                       ir_node *const addr)
1308 {
1309         ir_type *irtype = get_ir_type(type);
1310         if (is_compound_type(irtype)
1311                         || is_Method_type(irtype)
1312                         || is_Array_type(irtype)) {
1313                 return addr;
1314         }
1315
1316         ir_mode *const mode     = get_type_mode(irtype);
1317         ir_node *const memory   = get_store();
1318         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1319         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1320         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1321
1322         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1323                 set_Load_volatility(load, volatility_is_volatile);
1324         }
1325
1326         set_store(load_mem);
1327         return load_res;
1328 }
1329
1330 /**
1331  * Creates a strict Conv if neccessary.
1332  */
1333 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1334 {
1335         ir_mode *mode = get_irn_mode(node);
1336
1337         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1338                 return node;
1339         if (!mode_is_float(mode))
1340                 return node;
1341
1342         /* check if there is already a Conv */
1343         if (is_Conv(node)) {
1344                 /* convert it into a strict Conv */
1345                 set_Conv_strict(node, 1);
1346                 return node;
1347         }
1348
1349         /* otherwise create a new one */
1350         return new_d_strictConv(dbgi, node, mode);
1351 }
1352
1353 static ir_node *get_global_var_address(dbg_info *const dbgi,
1354                                        const entity_t *const entity)
1355 {
1356         assert(entity->kind == ENTITY_VARIABLE);
1357         assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1358
1359         ir_entity *const irentity = entity->variable.v.entity;
1360         switch ((storage_class_tag_t) entity->declaration.storage_class) {
1361                 case STORAGE_CLASS_THREAD:
1362                 case STORAGE_CLASS_THREAD_EXTERN:
1363                 case STORAGE_CLASS_THREAD_STATIC: {
1364                         ir_node *const no_mem = new_NoMem();
1365                         ir_node *const tls    = get_irg_tls(current_ir_graph);
1366                         return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1367                 }
1368
1369                 default:
1370                         return create_symconst(dbgi, mode_P_data, irentity);
1371         }
1372 }
1373
1374 /**
1375  * Returns the correct base address depending on whether it is a parameter or a
1376  * normal local variable.
1377  */
1378 static ir_node *get_local_frame(ir_entity *const ent)
1379 {
1380         ir_graph      *const irg   = current_ir_graph;
1381         const ir_type *const owner = get_entity_owner(ent);
1382         if (owner == get_irg_frame_type(irg)) {
1383                 return get_irg_frame(irg);
1384         } else {
1385                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1386                 return get_irg_value_param_base(irg);
1387         }
1388 }
1389
1390 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1391 {
1392         ir_mode *value_mode = get_irn_mode(value);
1393
1394         if (value_mode == dest_mode || is_Bad(value))
1395                 return value;
1396
1397         if (dest_mode == mode_b) {
1398                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1399                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1400                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1401                 return proj;
1402         }
1403
1404         return new_d_Conv(dbgi, value, dest_mode);
1405 }
1406
1407 /**
1408  * Keep all memory edges of the given block.
1409  */
1410 static void keep_all_memory(ir_node *block) {
1411         ir_node *old = get_cur_block();
1412
1413         set_cur_block(block);
1414         keep_alive(get_store());
1415         /* TODO: keep all memory edges from restricted pointers */
1416         set_cur_block(old);
1417 }
1418
1419 static ir_node *reference_expression_enum_value_to_firm(
1420                 const reference_expression_t *ref)
1421 {
1422         entity_t *entity = ref->entity;
1423         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1424         /* make sure the type is constructed */
1425         (void) get_ir_type(type);
1426
1427         ir_mode *const mode = get_ir_mode(type);
1428         return new_Const(mode, entity->enum_value.tv);
1429 }
1430
1431 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1432 {
1433         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1434         entity_t *entity = ref->entity;
1435         assert(is_declaration(entity));
1436         type_t   *type   = skip_typeref(entity->declaration.type);
1437
1438         /* make sure the type is constructed */
1439         (void) get_ir_type(type);
1440
1441         switch ((declaration_kind_t) entity->declaration.kind) {
1442         case DECLARATION_KIND_UNKNOWN:
1443                 break;
1444
1445         case DECLARATION_KIND_LOCAL_VARIABLE: {
1446                 ir_mode *const mode = get_ir_mode(type);
1447                 return get_value(entity->variable.v.value_number, mode);
1448         }
1449         case DECLARATION_KIND_FUNCTION: {
1450                 ir_mode *const mode = get_ir_mode(type);
1451                 return create_symconst(dbgi, mode, entity->function.entity);
1452         }
1453         case DECLARATION_KIND_INNER_FUNCTION: {
1454                 ir_mode *const mode = get_ir_mode(type);
1455                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1456                         /* inner function not using the closure */
1457                         return create_symconst(dbgi, mode, entity->function.entity);
1458                 } else {
1459                         /* TODO: need trampoline here */
1460                         panic("Trampoline code not implemented");
1461                         return create_symconst(dbgi, mode, entity->function.entity);
1462                 }
1463         }
1464         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1465                 ir_node *const addr = get_global_var_address(dbgi, entity);
1466                 return deref_address(dbgi, entity->declaration.type, addr);
1467         }
1468
1469         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1470                 ir_entity *irentity = entity->variable.v.entity;
1471                 ir_node   *frame    = get_local_frame(irentity);
1472                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1473                 return deref_address(dbgi, entity->declaration.type, sel);
1474         }
1475
1476         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1477                 return entity->variable.v.vla_base;
1478
1479         case DECLARATION_KIND_COMPOUND_MEMBER:
1480                 panic("not implemented reference type");
1481         }
1482
1483         panic("reference to declaration with unknown type found");
1484 }
1485
1486 static ir_node *reference_addr(const reference_expression_t *ref)
1487 {
1488         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1489         entity_t *entity = ref->entity;
1490         assert(is_declaration(entity));
1491
1492         switch((declaration_kind_t) entity->declaration.kind) {
1493         case DECLARATION_KIND_UNKNOWN:
1494                 break;
1495         case DECLARATION_KIND_LOCAL_VARIABLE:
1496                 /* you can store to a local variable (so we don't panic but return NULL
1497                  * as an indicator for no real address) */
1498                 return NULL;
1499         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1500                 ir_node *const addr = get_global_var_address(dbgi, entity);
1501                 return addr;
1502         }
1503         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1504                 ir_entity *irentity = entity->variable.v.entity;
1505                 ir_node   *frame    = get_local_frame(irentity);
1506                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1507
1508                 return sel;
1509         }
1510
1511         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1512                 return entity->variable.v.vla_base;
1513
1514         case DECLARATION_KIND_FUNCTION: {
1515                 type_t  *const type = skip_typeref(entity->declaration.type);
1516                 ir_mode *const mode = get_ir_mode(type);
1517                 return create_symconst(dbgi, mode, entity->function.entity);
1518         }
1519
1520         case DECLARATION_KIND_INNER_FUNCTION:
1521         case DECLARATION_KIND_COMPOUND_MEMBER:
1522                 panic("not implemented reference type");
1523         }
1524
1525         panic("reference to declaration with unknown type found");
1526 }
1527
1528 /**
1529  * Transform calls to builtin functions.
1530  */
1531 static ir_node *process_builtin_call(const call_expression_t *call)
1532 {
1533         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1534
1535         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1536         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1537
1538         type_t *type = skip_typeref(builtin->base.type);
1539         assert(is_type_pointer(type));
1540
1541         type_t   *function_type = skip_typeref(type->pointer.points_to);
1542         symbol_t *symbol        = builtin->symbol;
1543
1544         switch(symbol->ID) {
1545         case T___builtin_alloca: {
1546                 if (call->arguments == NULL || call->arguments->next != NULL) {
1547                         panic("invalid number of parameters on __builtin_alloca");
1548                 }
1549                 expression_t *argument = call->arguments->expression;
1550                 ir_node      *size     = expression_to_firm(argument);
1551
1552                 ir_node *store  = get_store();
1553                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1554                                               stack_alloc);
1555                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1556                 set_store(proj_m);
1557                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1558
1559                 return res;
1560         }
1561
1562         case T___builtin_huge_val:
1563         case T___builtin_inf:
1564         case T___builtin_inff:
1565         case T___builtin_infl: {
1566                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1567                 tarval  *tv   = get_mode_infinite(mode);
1568                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1569                 return   res;
1570         }
1571         case T___builtin_nan:
1572         case T___builtin_nanf:
1573         case T___builtin_nanl: {
1574                 /* Ignore string for now... */
1575                 assert(is_type_function(function_type));
1576                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1577                 tarval  *tv   = get_mode_NAN(mode);
1578                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1579                 return res;
1580         }
1581         case T___builtin_va_end:
1582                 return NULL;
1583         default:
1584                 panic("Unsupported builtin found\n");
1585         }
1586 }
1587
1588 /**
1589  * Transform a call expression.
1590  * Handles some special cases, like alloca() calls, which must be resolved
1591  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1592  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1593  * handled right...
1594  */
1595 static ir_node *call_expression_to_firm(const call_expression_t *call)
1596 {
1597         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1598         assert(get_cur_block() != NULL);
1599
1600         expression_t *function = call->function;
1601         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1602                 return process_builtin_call(call);
1603         }
1604         if (function->kind == EXPR_REFERENCE) {
1605                 const reference_expression_t *ref    = &function->reference;
1606                 entity_t                     *entity = ref->entity;
1607
1608                 if (entity->kind == ENTITY_FUNCTION
1609                                 && entity->function.entity == rts_entities[rts_alloca]) {
1610                         /* handle alloca() call */
1611                         expression_t *argument = call->arguments->expression;
1612                         ir_node      *size     = expression_to_firm(argument);
1613
1614                         size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1615
1616                         ir_node  *store  = get_store();
1617                         dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1618                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1619                                                        stack_alloc);
1620                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1621                         set_store(proj_m);
1622                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1623
1624                         return res;
1625                 }
1626         }
1627         ir_node *callee = expression_to_firm(function);
1628
1629         type_t *type = skip_typeref(function->base.type);
1630         assert(is_type_pointer(type));
1631         pointer_type_t *pointer_type = &type->pointer;
1632         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1633         assert(is_type_function(points_to));
1634         function_type_t *function_type = &points_to->function;
1635
1636         int      n_parameters = 0;
1637         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1638         ir_type *new_method_type = NULL;
1639         if (function_type->variadic || function_type->unspecified_parameters) {
1640                 const call_argument_t *argument = call->arguments;
1641                 for ( ; argument != NULL; argument = argument->next) {
1642                         ++n_parameters;
1643                 }
1644
1645                 /* we need to construct a new method type matching the call
1646                  * arguments... */
1647                 int n_res       = get_method_n_ress(ir_method_type);
1648                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1649                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1650                                                     n_parameters, n_res, dbgi);
1651                 set_method_calling_convention(new_method_type,
1652                                get_method_calling_convention(ir_method_type));
1653                 set_method_additional_properties(new_method_type,
1654                                get_method_additional_properties(ir_method_type));
1655                 set_method_variadicity(new_method_type,
1656                                        get_method_variadicity(ir_method_type));
1657
1658                 for (int i = 0; i < n_res; ++i) {
1659                         set_method_res_type(new_method_type, i,
1660                                             get_method_res_type(ir_method_type, i));
1661                 }
1662                 argument = call->arguments;
1663                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1664                         expression_t *expression = argument->expression;
1665                         ir_type      *irtype     = get_ir_type(expression->base.type);
1666                         set_method_param_type(new_method_type, i, irtype);
1667                 }
1668                 ir_method_type = new_method_type;
1669         } else {
1670                 n_parameters = get_method_n_params(ir_method_type);
1671         }
1672
1673         ir_node *in[n_parameters];
1674
1675         const call_argument_t *argument = call->arguments;
1676         for (int n = 0; n < n_parameters; ++n) {
1677                 expression_t *expression = argument->expression;
1678                 ir_node      *arg_node   = expression_to_firm(expression);
1679
1680                 arg_node = do_strict_conv(dbgi, arg_node);
1681
1682                 in[n] = arg_node;
1683
1684                 argument = argument->next;
1685         }
1686
1687         ir_node  *store = get_store();
1688         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1689                                      ir_method_type);
1690         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1691         set_store(mem);
1692
1693         type_t  *return_type = skip_typeref(function_type->return_type);
1694         ir_node *result      = NULL;
1695
1696         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1697                 ir_mode *mode;
1698                 if (is_type_scalar(return_type)) {
1699                         mode = get_ir_mode(return_type);
1700                 } else {
1701                         mode = mode_P_data;
1702                 }
1703                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1704                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1705         }
1706
1707         if (function->kind == EXPR_REFERENCE &&
1708             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1709                 /* A dead end:  Keep the Call and the Block.  Also place all further
1710                  * nodes into a new and unreachable block. */
1711                 keep_alive(node);
1712                 keep_alive(get_cur_block());
1713                 new_Block(0, NULL);
1714         }
1715
1716         return result;
1717 }
1718
1719 static void statement_to_firm(statement_t *statement);
1720 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1721
1722 static ir_node *expression_to_addr(const expression_t *expression);
1723 static ir_node *create_condition_evaluation(const expression_t *expression,
1724                                             ir_node *true_block,
1725                                             ir_node *false_block);
1726
1727 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1728                          ir_node *value)
1729 {
1730         value = do_strict_conv(dbgi, value);
1731
1732         ir_node *memory = get_store();
1733
1734         if (is_type_scalar(type)) {
1735                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1736                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1737                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1738                         set_Store_volatility(store, volatility_is_volatile);
1739                 set_store(store_mem);
1740         } else {
1741                 ir_type *irtype    = get_ir_type(type);
1742                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1743                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1744                 set_store(copyb_mem);
1745         }
1746 }
1747
1748 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1749 {
1750         tarval *all_one   = get_mode_all_one(mode);
1751         int     mode_size = get_mode_size_bits(mode);
1752
1753         assert(offset >= 0);
1754         assert(size   >= 0);
1755         assert(offset + size <= mode_size);
1756         if (size == mode_size) {
1757                 return all_one;
1758         }
1759
1760         long    shiftr    = get_mode_size_bits(mode) - size;
1761         long    shiftl    = offset;
1762         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1763         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1764         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1765         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1766
1767         return mask1;
1768 }
1769
1770 static void bitfield_store_to_firm(dbg_info *dbgi,
1771                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1772 {
1773         ir_type *entity_type = get_entity_type(entity);
1774         ir_type *base_type   = get_primitive_base_type(entity_type);
1775         assert(base_type != NULL);
1776         ir_mode *mode        = get_type_mode(base_type);
1777
1778         value = create_conv(dbgi, value, mode);
1779
1780         /* kill upper bits of value and shift to right position */
1781         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1782         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1783
1784         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1785         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1786         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1787         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1788         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1789         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1790
1791         /* load current value */
1792         ir_node  *mem             = get_store();
1793         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1794         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1795         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1796         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1797         tarval   *inv_mask        = tarval_not(shift_mask);
1798         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1799         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1800
1801         /* construct new value and store */
1802         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1803         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1804         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1805         set_store(store_mem);
1806
1807         if (set_volatile) {
1808                 set_Load_volatility(load, volatility_is_volatile);
1809                 set_Store_volatility(store, volatility_is_volatile);
1810         }
1811 }
1812
1813 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1814                 ir_node *addr)
1815 {
1816         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1817         type_t   *type     = expression->base.type;
1818         ir_mode  *mode     = get_ir_mode(type);
1819         ir_node  *mem      = get_store();
1820         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1821         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1822         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1823
1824         load_res           = create_conv(dbgi, load_res, mode_int);
1825
1826         set_store(load_mem);
1827
1828         /* kill upper bits */
1829         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1830         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1831         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1832         ir_type   *entity_type  = get_entity_type(entity);
1833         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1834         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1835         assert(shift_bitsl >= 0);
1836         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1837         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1838         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1839
1840         long       shift_bitsr  = bitoffset + shift_bitsl;
1841         assert(shift_bitsr <= (long) machine_size);
1842         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1843         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1844         ir_node   *shiftr;
1845         if (mode_is_signed(mode)) {
1846                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1847         } else {
1848                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1849         }
1850
1851         return create_conv(dbgi, shiftr, mode);
1852 }
1853
1854 /* make sure the selected compound type is constructed */
1855 static void construct_select_compound(const select_expression_t *expression)
1856 {
1857         type_t *type = skip_typeref(expression->compound->base.type);
1858         if (is_type_pointer(type)) {
1859                 type = type->pointer.points_to;
1860         }
1861         (void) get_ir_type(type);
1862 }
1863
1864 static void set_value_for_expression_addr(const expression_t *expression,
1865                                           ir_node *value, ir_node *addr)
1866 {
1867         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1868         value          = do_strict_conv(dbgi, value);
1869
1870         if (expression->kind == EXPR_REFERENCE) {
1871                 const reference_expression_t *ref = &expression->reference;
1872
1873                 entity_t *entity = ref->entity;
1874                 assert(is_declaration(entity));
1875                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1876                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1877                         set_value(entity->variable.v.value_number, value);
1878                         return;
1879                 }
1880         }
1881
1882         if (addr == NULL)
1883                 addr = expression_to_addr(expression);
1884
1885         type_t *type = skip_typeref(expression->base.type);
1886
1887         if (expression->kind == EXPR_SELECT) {
1888                 const select_expression_t *select = &expression->select;
1889
1890                 construct_select_compound(select);
1891
1892                 entity_t *entity = select->compound_entry;
1893                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1894                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1895                         ir_entity *irentity = entity->compound_member.entity;
1896                         bool       set_volatile
1897                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1898                         bitfield_store_to_firm(dbgi, irentity, addr, value, set_volatile);
1899                         return;
1900                 }
1901         }
1902
1903         assign_value(dbgi, addr, type, value);
1904 }
1905
1906 static void set_value_for_expression(const expression_t *expression,
1907                                      ir_node *value)
1908 {
1909         set_value_for_expression_addr(expression, value, NULL);
1910 }
1911
1912 static ir_node *get_value_from_lvalue(const expression_t *expression,
1913                                       ir_node *addr)
1914 {
1915         if (expression->kind == EXPR_REFERENCE) {
1916                 const reference_expression_t *ref = &expression->reference;
1917
1918                 entity_t *entity = ref->entity;
1919                 assert(entity->kind == ENTITY_VARIABLE);
1920                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1921                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1922                         assert(addr == NULL);
1923                         ir_mode *mode = get_ir_mode(expression->base.type);
1924                         return get_value(entity->variable.v.value_number, mode);
1925                 }
1926         }
1927
1928         assert(addr != NULL);
1929         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1930
1931         ir_node *value;
1932         if (expression->kind == EXPR_SELECT &&
1933             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
1934             construct_select_compound(&expression->select);
1935                 value = bitfield_extract_to_firm(&expression->select, addr);
1936         } else {
1937                 value = deref_address(dbgi, expression->base.type, addr);
1938         }
1939
1940         return value;
1941 }
1942
1943
1944 static ir_node *create_incdec(const unary_expression_t *expression)
1945 {
1946         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1947         const expression_t *value_expr = expression->value;
1948         ir_node            *addr       = expression_to_addr(value_expr);
1949         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1950
1951         type_t  *type = skip_typeref(expression->base.type);
1952         ir_mode *mode = get_ir_mode(expression->base.type);
1953
1954         ir_node *offset;
1955         if (is_type_pointer(type)) {
1956                 pointer_type_t *pointer_type = &type->pointer;
1957                 offset                       = get_type_size(pointer_type->points_to);
1958         } else {
1959                 assert(is_type_arithmetic(type));
1960                 offset = new_Const(mode, get_mode_one(mode));
1961         }
1962
1963         ir_node *result;
1964         ir_node *store_value;
1965         switch(expression->base.kind) {
1966         case EXPR_UNARY_POSTFIX_INCREMENT:
1967                 result      = value;
1968                 store_value = new_d_Add(dbgi, value, offset, mode);
1969                 break;
1970         case EXPR_UNARY_POSTFIX_DECREMENT:
1971                 result      = value;
1972                 store_value = new_d_Sub(dbgi, value, offset, mode);
1973                 break;
1974         case EXPR_UNARY_PREFIX_INCREMENT:
1975                 result      = new_d_Add(dbgi, value, offset, mode);
1976                 store_value = result;
1977                 break;
1978         case EXPR_UNARY_PREFIX_DECREMENT:
1979                 result      = new_d_Sub(dbgi, value, offset, mode);
1980                 store_value = result;
1981                 break;
1982         default:
1983                 panic("no incdec expr in create_incdec");
1984         }
1985
1986         set_value_for_expression_addr(value_expr, store_value, addr);
1987
1988         return result;
1989 }
1990
1991 static bool is_local_variable(expression_t *expression)
1992 {
1993         if (expression->kind != EXPR_REFERENCE)
1994                 return false;
1995         reference_expression_t *ref_expr = &expression->reference;
1996         entity_t               *entity   = ref_expr->entity;
1997         if (entity->kind != ENTITY_VARIABLE)
1998                 return false;
1999         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2000         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2001 }
2002
2003 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2004 {
2005         switch(kind) {
2006         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2007         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2008         case EXPR_BINARY_NOTEQUAL:
2009                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2010         case EXPR_BINARY_ISLESS:
2011         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2012         case EXPR_BINARY_ISLESSEQUAL:
2013         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2014         case EXPR_BINARY_ISGREATER:
2015         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2016         case EXPR_BINARY_ISGREATEREQUAL:
2017         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2018         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2019
2020         default:
2021                 break;
2022         }
2023         panic("trying to get pn_Cmp from non-comparison binexpr type");
2024 }
2025
2026 /**
2027  * Handle the assume optimizer hint: check if a Confirm
2028  * node can be created.
2029  *
2030  * @param dbi    debug info
2031  * @param expr   the IL assume expression
2032  *
2033  * we support here only some simple cases:
2034  *  - var rel const
2035  *  - const rel val
2036  *  - var rel var
2037  */
2038 static ir_node *handle_assume_compare(dbg_info *dbi,
2039                                       const binary_expression_t *expression)
2040 {
2041         expression_t *op1 = expression->left;
2042         expression_t *op2 = expression->right;
2043         entity_t     *var2, *var = NULL;
2044         ir_node      *res = NULL;
2045         pn_Cmp        cmp_val;
2046
2047         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2048
2049         if (is_local_variable(op1) && is_local_variable(op2)) {
2050         var  = op1->reference.entity;
2051             var2 = op2->reference.entity;
2052
2053                 type_t  *const type = skip_typeref(var->declaration.type);
2054                 ir_mode *const mode = get_ir_mode(type);
2055
2056                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2057                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2058
2059                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2060                 set_value(var2->variable.v.value_number, res);
2061
2062                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2063                 set_value(var->variable.v.value_number, res);
2064
2065                 return res;
2066         }
2067
2068         expression_t *con;
2069         if (is_local_variable(op1) && is_constant_expression(op2)) {
2070                 var = op1->reference.entity;
2071                 con = op2;
2072         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2073                 cmp_val = get_inversed_pnc(cmp_val);
2074                 var = op2->reference.entity;
2075                 con = op1;
2076         }
2077
2078         if (var != NULL) {
2079                 type_t  *const type = skip_typeref(var->declaration.type);
2080                 ir_mode *const mode = get_ir_mode(type);
2081
2082                 res = get_value(var->variable.v.value_number, mode);
2083                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2084                 set_value(var->variable.v.value_number, res);
2085         }
2086         return res;
2087 }
2088
2089 /**
2090  * Handle the assume optimizer hint.
2091  *
2092  * @param dbi    debug info
2093  * @param expr   the IL assume expression
2094  */
2095 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2096         switch(expression->kind) {
2097         case EXPR_BINARY_EQUAL:
2098         case EXPR_BINARY_NOTEQUAL:
2099         case EXPR_BINARY_LESS:
2100         case EXPR_BINARY_LESSEQUAL:
2101         case EXPR_BINARY_GREATER:
2102         case EXPR_BINARY_GREATEREQUAL:
2103                 return handle_assume_compare(dbi, &expression->binary);
2104         default:
2105                 return NULL;
2106         }
2107 }
2108
2109 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2110 {
2111         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2112         type_t   *type = skip_typeref(expression->base.type);
2113
2114         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2115                 return expression_to_addr(expression->value);
2116
2117         const expression_t *value = expression->value;
2118
2119         switch(expression->base.kind) {
2120         case EXPR_UNARY_NEGATE: {
2121                 ir_node *value_node = expression_to_firm(value);
2122                 ir_mode *mode = get_ir_mode(type);
2123                 return new_d_Minus(dbgi, value_node, mode);
2124         }
2125         case EXPR_UNARY_PLUS:
2126                 return expression_to_firm(value);
2127         case EXPR_UNARY_BITWISE_NEGATE: {
2128                 ir_node *value_node = expression_to_firm(value);
2129                 ir_mode *mode = get_ir_mode(type);
2130                 return new_d_Not(dbgi, value_node, mode);
2131         }
2132         case EXPR_UNARY_NOT: {
2133                 ir_node *value_node = _expression_to_firm(value);
2134                 value_node          = create_conv(dbgi, value_node, mode_b);
2135                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2136                 return res;
2137         }
2138         case EXPR_UNARY_DEREFERENCE: {
2139                 ir_node *value_node = expression_to_firm(value);
2140                 type_t  *value_type = skip_typeref(value->base.type);
2141                 assert(is_type_pointer(value_type));
2142                 type_t  *points_to  = value_type->pointer.points_to;
2143                 return deref_address(dbgi, points_to, value_node);
2144         }
2145         case EXPR_UNARY_POSTFIX_INCREMENT:
2146         case EXPR_UNARY_POSTFIX_DECREMENT:
2147         case EXPR_UNARY_PREFIX_INCREMENT:
2148         case EXPR_UNARY_PREFIX_DECREMENT:
2149                 return create_incdec(expression);
2150         case EXPR_UNARY_CAST: {
2151                 ir_node *value_node = expression_to_firm(value);
2152                 if (is_type_scalar(type)) {
2153                         ir_mode *mode = get_ir_mode(type);
2154                         ir_node *node = create_conv(dbgi, value_node, mode);
2155                         node = do_strict_conv(dbgi, node);
2156                         return node;
2157                 } else {
2158                         /* make sure firm type is constructed */
2159                         (void) get_ir_type(type);
2160                         return value_node;
2161                 }
2162         }
2163         case EXPR_UNARY_CAST_IMPLICIT: {
2164                 ir_node *value_node = expression_to_firm(value);
2165                 if (is_type_scalar(type)) {
2166                         ir_mode *mode = get_ir_mode(type);
2167                         return create_conv(dbgi, value_node, mode);
2168                 } else {
2169                         return value_node;
2170                 }
2171         }
2172         case EXPR_UNARY_ASSUME:
2173                 if (firm_opt.confirm)
2174                         return handle_assume(dbgi, value);
2175                 else
2176                         return NULL;
2177
2178         default:
2179                 break;
2180         }
2181         panic("invalid UNEXPR type found");
2182 }
2183
2184 /**
2185  * produces a 0/1 depending of the value of a mode_b node
2186  */
2187 static ir_node *produce_condition_result(const expression_t *expression,
2188                                          dbg_info *dbgi)
2189 {
2190         ir_mode *mode      = get_ir_mode(expression->base.type);
2191         ir_node *cur_block = get_cur_block();
2192
2193         ir_node *one_block = new_immBlock();
2194         ir_node *one       = new_Const(mode, get_mode_one(mode));
2195         ir_node *jmp_one   = new_d_Jmp(dbgi);
2196
2197         ir_node *zero_block = new_immBlock();
2198         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2199         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2200
2201         set_cur_block(cur_block);
2202         create_condition_evaluation(expression, one_block, zero_block);
2203         mature_immBlock(one_block);
2204         mature_immBlock(zero_block);
2205
2206         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2207         new_Block(2, in_cf);
2208
2209         ir_node *in[2] = { one, zero };
2210         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2211
2212         return val;
2213 }
2214
2215 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2216                 ir_node *value, type_t *type)
2217 {
2218         pointer_type_t *const pointer_type = &type->pointer;
2219         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2220         unsigned              elem_size    = get_type_size_const(points_to);
2221
2222         /* gcc extension: allow arithmetic with void * and function * */
2223         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2224             is_type_function(points_to))  {
2225                 elem_size = 1;
2226         }
2227
2228         assert(elem_size >= 1);
2229         if (elem_size == 1)
2230                 return value;
2231
2232         value = create_conv(dbgi, value, mode_int);
2233         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2234         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2235         return mul;
2236 }
2237
2238 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2239                           ir_node *left, ir_node *right)
2240 {
2241         ir_mode  *mode;
2242         type_t   *type_left  = skip_typeref(expression->left->base.type);
2243         type_t   *type_right = skip_typeref(expression->right->base.type);
2244
2245         expression_kind_t kind = expression->base.kind;
2246
2247         switch (kind) {
2248         case EXPR_BINARY_SHIFTLEFT:
2249         case EXPR_BINARY_SHIFTRIGHT:
2250         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2251         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2252                 mode  = get_irn_mode(left);
2253                 right = create_conv(dbgi, right, mode_uint);
2254                 break;
2255
2256         case EXPR_BINARY_SUB:
2257                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2258                         const pointer_type_t *const ptr_type = &type_left->pointer;
2259
2260                         mode = get_ir_mode(expression->base.type);
2261                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2262                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2263                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2264                         ir_node *const no_mem    = new_NoMem();
2265                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2266                                                                                                    mode, op_pin_state_floats);
2267                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2268                 }
2269                 /* fallthrough */
2270         case EXPR_BINARY_SUB_ASSIGN:
2271                 if (is_type_pointer(type_left)) {
2272                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2273                         mode  = get_ir_mode(type_left);
2274                         break;
2275                 }
2276                 goto normal_node;
2277
2278         case EXPR_BINARY_ADD:
2279         case EXPR_BINARY_ADD_ASSIGN:
2280                 if (is_type_pointer(type_left)) {
2281                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2282                         mode  = get_ir_mode(type_left);
2283                         break;
2284                 } else if (is_type_pointer(type_right)) {
2285                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2286                         mode  = get_ir_mode(type_right);
2287                         break;
2288                 }
2289                 goto normal_node;
2290
2291         default:
2292 normal_node:
2293                 mode = get_irn_mode(right);
2294                 left = create_conv(dbgi, left, mode);
2295                 break;
2296         }
2297
2298         switch (kind) {
2299         case EXPR_BINARY_ADD_ASSIGN:
2300         case EXPR_BINARY_ADD:
2301                 return new_d_Add(dbgi, left, right, mode);
2302         case EXPR_BINARY_SUB_ASSIGN:
2303         case EXPR_BINARY_SUB:
2304                 return new_d_Sub(dbgi, left, right, mode);
2305         case EXPR_BINARY_MUL_ASSIGN:
2306         case EXPR_BINARY_MUL:
2307                 return new_d_Mul(dbgi, left, right, mode);
2308         case EXPR_BINARY_BITWISE_AND:
2309         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2310                 return new_d_And(dbgi, left, right, mode);
2311         case EXPR_BINARY_BITWISE_OR:
2312         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2313                 return new_d_Or(dbgi, left, right, mode);
2314         case EXPR_BINARY_BITWISE_XOR:
2315         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2316                 return new_d_Eor(dbgi, left, right, mode);
2317         case EXPR_BINARY_SHIFTLEFT:
2318         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2319                 return new_d_Shl(dbgi, left, right, mode);
2320         case EXPR_BINARY_SHIFTRIGHT:
2321         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2322                 if (mode_is_signed(mode)) {
2323                         return new_d_Shrs(dbgi, left, right, mode);
2324                 } else {
2325                         return new_d_Shr(dbgi, left, right, mode);
2326                 }
2327         case EXPR_BINARY_DIV:
2328         case EXPR_BINARY_DIV_ASSIGN: {
2329                 ir_node *pin = new_Pin(new_NoMem());
2330                 ir_node *op;
2331                 ir_node *res;
2332                 if (mode_is_float(mode)) {
2333                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2334                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2335                 } else {
2336                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2337                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2338                 }
2339                 return res;
2340         }
2341         case EXPR_BINARY_MOD:
2342         case EXPR_BINARY_MOD_ASSIGN: {
2343                 ir_node *pin = new_Pin(new_NoMem());
2344                 assert(!mode_is_float(mode));
2345                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2346                                          op_pin_state_floats);
2347                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2348                 return res;
2349         }
2350         default:
2351                 panic("unexpected expression kind");
2352         }
2353 }
2354
2355 static ir_node *create_lazy_op(const binary_expression_t *expression)
2356 {
2357         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2358         type_t   *type = expression->base.type;
2359         ir_mode  *mode = get_ir_mode(type);
2360
2361         if (is_constant_expression(expression->left)) {
2362                 long val = fold_constant(expression->left);
2363                 expression_kind_t ekind = expression->base.kind;
2364                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2365                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2366                     (ekind == EXPR_BINARY_LOGICAL_OR  && val == 0)) {
2367                         return expression_to_firm(expression->right);
2368                 } else {
2369                         return new_Const(mode, get_mode_one(mode));
2370                 }
2371         }
2372
2373         return produce_condition_result((const expression_t*) expression, dbgi);
2374 }
2375
2376 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2377                                             ir_node *right, ir_mode *mode);
2378
2379 static ir_node *create_assign_binop(const binary_expression_t *expression)
2380 {
2381         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2382         const expression_t *left_expr = expression->left;
2383         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2384         ir_node            *right     = expression_to_firm(expression->right);
2385         ir_node            *left_addr = expression_to_addr(left_expr);
2386         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2387         ir_node            *result    = create_op(dbgi, expression, left, right);
2388
2389         result = create_conv(dbgi, result, left_mode);
2390         result = do_strict_conv(dbgi, result);
2391
2392         set_value_for_expression_addr(left_expr, result, left_addr);
2393
2394         return result;
2395 }
2396
2397 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2398 {
2399         expression_kind_t kind = expression->base.kind;
2400
2401         switch(kind) {
2402         case EXPR_BINARY_EQUAL:
2403         case EXPR_BINARY_NOTEQUAL:
2404         case EXPR_BINARY_LESS:
2405         case EXPR_BINARY_LESSEQUAL:
2406         case EXPR_BINARY_GREATER:
2407         case EXPR_BINARY_GREATEREQUAL:
2408         case EXPR_BINARY_ISGREATER:
2409         case EXPR_BINARY_ISGREATEREQUAL:
2410         case EXPR_BINARY_ISLESS:
2411         case EXPR_BINARY_ISLESSEQUAL:
2412         case EXPR_BINARY_ISLESSGREATER:
2413         case EXPR_BINARY_ISUNORDERED: {
2414                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2415                 ir_node *left  = expression_to_firm(expression->left);
2416                 ir_node *right = expression_to_firm(expression->right);
2417                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2418                 long     pnc   = get_pnc(kind, expression->left->base.type);
2419                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2420                 return proj;
2421         }
2422         case EXPR_BINARY_ASSIGN: {
2423                 ir_node *addr  = expression_to_addr(expression->left);
2424                 ir_node *right = expression_to_firm(expression->right);
2425                 set_value_for_expression_addr(expression->left, right, addr);
2426
2427                 return right;
2428         }
2429         case EXPR_BINARY_ADD:
2430         case EXPR_BINARY_SUB:
2431         case EXPR_BINARY_MUL:
2432         case EXPR_BINARY_DIV:
2433         case EXPR_BINARY_MOD:
2434         case EXPR_BINARY_BITWISE_AND:
2435         case EXPR_BINARY_BITWISE_OR:
2436         case EXPR_BINARY_BITWISE_XOR:
2437         case EXPR_BINARY_SHIFTLEFT:
2438         case EXPR_BINARY_SHIFTRIGHT:
2439         {
2440                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2441                 ir_node  *left  = expression_to_firm(expression->left);
2442                 ir_node  *right = expression_to_firm(expression->right);
2443                 return create_op(dbgi, expression, left, right);
2444         }
2445         case EXPR_BINARY_LOGICAL_AND:
2446         case EXPR_BINARY_LOGICAL_OR:
2447                 return create_lazy_op(expression);
2448         case EXPR_BINARY_COMMA:
2449                 /* create side effects of left side */
2450                 (void) expression_to_firm(expression->left);
2451                 return _expression_to_firm(expression->right);
2452
2453         case EXPR_BINARY_ADD_ASSIGN:
2454         case EXPR_BINARY_SUB_ASSIGN:
2455         case EXPR_BINARY_MUL_ASSIGN:
2456         case EXPR_BINARY_MOD_ASSIGN:
2457         case EXPR_BINARY_DIV_ASSIGN:
2458         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2459         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2460         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2461         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2462         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2463                 return create_assign_binop(expression);
2464         case EXPR_BINARY_BUILTIN_EXPECT:
2465                 return _expression_to_firm(expression->left);
2466         default:
2467                 panic("TODO binexpr type");
2468         }
2469 }
2470
2471 static ir_node *array_access_addr(const array_access_expression_t *expression)
2472 {
2473         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2474         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2475         ir_node  *offset    = expression_to_firm(expression->index);
2476
2477         type_t  *offset_type = skip_typeref(expression->index->base.type);
2478         ir_mode *mode;
2479         if (is_type_signed(offset_type)) {
2480                 mode = get_ir_mode(type_ssize_t);
2481         } else {
2482                 mode = get_ir_mode(type_size_t);
2483         }
2484         offset = create_conv(dbgi, offset, mode);
2485
2486         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2487         assert(is_type_pointer(ref_type));
2488         pointer_type_t *pointer_type = &ref_type->pointer;
2489
2490         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2491         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2492         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2493                                              mode);
2494         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2495
2496         return result;
2497 }
2498
2499 static ir_node *array_access_to_firm(
2500                 const array_access_expression_t *expression)
2501 {
2502         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2503         ir_node  *addr   = array_access_addr(expression);
2504         type_t   *type   = revert_automatic_type_conversion(
2505                         (const expression_t*) expression);
2506         type             = skip_typeref(type);
2507
2508         return deref_address(dbgi, type, addr);
2509 }
2510
2511 static long get_offsetof_offset(const offsetof_expression_t *expression)
2512 {
2513         type_t *orig_type = expression->type;
2514         long    offset    = 0;
2515
2516         designator_t *designator = expression->designator;
2517         for ( ; designator != NULL; designator = designator->next) {
2518                 type_t *type = skip_typeref(orig_type);
2519                 /* be sure the type is constructed */
2520                 (void) get_ir_type(type);
2521
2522                 if (designator->symbol != NULL) {
2523                         assert(is_type_compound(type));
2524                         symbol_t *symbol = designator->symbol;
2525
2526                         compound_t *compound = type->compound.compound;
2527                         entity_t   *iter     = compound->members.entities;
2528                         for ( ; iter != NULL; iter = iter->base.next) {
2529                                 if (iter->base.symbol == symbol) {
2530                                         break;
2531                                 }
2532                         }
2533                         assert(iter != NULL);
2534
2535                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2536                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2537                         offset += get_entity_offset(iter->compound_member.entity);
2538
2539                         orig_type = iter->declaration.type;
2540                 } else {
2541                         expression_t *array_index = designator->array_index;
2542                         assert(designator->array_index != NULL);
2543                         assert(is_type_array(type));
2544
2545                         long index         = fold_constant(array_index);
2546                         ir_type *arr_type  = get_ir_type(type);
2547                         ir_type *elem_type = get_array_element_type(arr_type);
2548                         long     elem_size = get_type_size_bytes(elem_type);
2549
2550                         offset += index * elem_size;
2551
2552                         orig_type = type->array.element_type;
2553                 }
2554         }
2555
2556         return offset;
2557 }
2558
2559 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2560 {
2561         ir_mode  *mode   = get_ir_mode(expression->base.type);
2562         long      offset = get_offsetof_offset(expression);
2563         tarval   *tv     = new_tarval_from_long(offset, mode);
2564         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2565
2566         return new_d_Const(dbgi, mode, tv);
2567 }
2568
2569 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2570                                      ir_entity *entity, type_t *type);
2571
2572 static ir_node *compound_literal_to_firm(
2573                 const compound_literal_expression_t *expression)
2574 {
2575         type_t *type = expression->type;
2576
2577         /* create an entity on the stack */
2578         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2579
2580         ident     *const id     = id_unique("CompLit.%u");
2581         ir_type   *const irtype = get_ir_type(type);
2582         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2583         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2584         set_entity_ld_ident(entity, id);
2585
2586         set_entity_variability(entity, variability_uninitialized);
2587
2588         /* create initialisation code */
2589         initializer_t *initializer = expression->initializer;
2590         create_local_initializer(initializer, dbgi, entity, type);
2591
2592         /* create a sel for the compound literal address */
2593         ir_node *frame = get_local_frame(entity);
2594         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2595         return sel;
2596 }
2597
2598 /**
2599  * Transform a sizeof expression into Firm code.
2600  */
2601 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2602 {
2603         type_t *type = expression->type;
2604         if (type == NULL) {
2605                 type = expression->tp_expression->base.type;
2606                 assert(type != NULL);
2607         }
2608
2609         type = skip_typeref(type);
2610         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2611         if (is_type_array(type) && type->array.is_vla
2612                         && expression->tp_expression != NULL) {
2613                 expression_to_firm(expression->tp_expression);
2614         }
2615
2616         return get_type_size(type);
2617 }
2618
2619 /**
2620  * Transform an alignof expression into Firm code.
2621  */
2622 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2623 {
2624         type_t *type = expression->type;
2625         if (type == NULL) {
2626                 /* beware: if expression is a variable reference, return the
2627                    alignment of the variable. */
2628                 const expression_t *tp_expression = expression->tp_expression;
2629                 const entity_t     *entity        = expression_is_variable(tp_expression);
2630                 if (entity != NULL) {
2631                         /* TODO: get the alignment of this variable. */
2632                         (void) entity;
2633                 }
2634                 type = tp_expression->base.type;
2635                 assert(type != NULL);
2636         }
2637
2638         ir_mode *const mode = get_ir_mode(expression->base.type);
2639         symconst_symbol sym;
2640         sym.type_p = get_ir_type(type);
2641         return new_SymConst(mode, sym, symconst_type_align);
2642 }
2643
2644 static void init_ir_types(void);
2645
2646 long fold_constant(const expression_t *expression)
2647 {
2648         assert(is_type_valid(skip_typeref(expression->base.type)));
2649
2650         bool constant_folding_old = constant_folding;
2651         constant_folding = true;
2652
2653         init_ir_types();
2654
2655         assert(is_constant_expression(expression));
2656
2657         ir_graph *old_current_ir_graph = current_ir_graph;
2658         if (current_ir_graph == NULL) {
2659                 current_ir_graph = get_const_code_irg();
2660         }
2661
2662         ir_node *cnst = expression_to_firm(expression);
2663         current_ir_graph = old_current_ir_graph;
2664
2665         if (!is_Const(cnst)) {
2666                 panic("couldn't fold constant\n");
2667         }
2668
2669         tarval *tv = get_Const_tarval(cnst);
2670         if (!tarval_is_long(tv)) {
2671                 panic("result of constant folding is not integer\n");
2672         }
2673
2674         constant_folding = constant_folding_old;
2675
2676         return get_tarval_long(tv);
2677 }
2678
2679 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2680 {
2681         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2682
2683         /* first try to fold a constant condition */
2684         if (is_constant_expression(expression->condition)) {
2685                 long val = fold_constant(expression->condition);
2686                 if (val) {
2687                         expression_t *true_expression = expression->true_expression;
2688                         if (true_expression == NULL)
2689                                 true_expression = expression->condition;
2690                         return expression_to_firm(true_expression);
2691                 } else {
2692                         return expression_to_firm(expression->false_expression);
2693                 }
2694         }
2695
2696         ir_node *cur_block   = get_cur_block();
2697
2698         /* create the true block */
2699         ir_node *true_block  = new_immBlock();
2700
2701         ir_node *true_val = expression->true_expression != NULL ?
2702                 expression_to_firm(expression->true_expression) : NULL;
2703         ir_node *true_jmp = new_Jmp();
2704
2705         /* create the false block */
2706         ir_node *false_block = new_immBlock();
2707
2708         ir_node *false_val = expression_to_firm(expression->false_expression);
2709         ir_node *false_jmp = new_Jmp();
2710
2711         /* create the condition evaluation */
2712         set_cur_block(cur_block);
2713         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2714         if (expression->true_expression == NULL) {
2715                 if (cond_expr != NULL) {
2716                         true_val = cond_expr;
2717                 } else {
2718                         /* Condition ended with a short circuit (&&, ||, !) operation.
2719                          * Generate a "1" as value for the true branch. */
2720                         ir_mode *const mode = mode_Is;
2721                         true_val = new_Const(mode, get_mode_one(mode));
2722                 }
2723         }
2724         mature_immBlock(true_block);
2725         mature_immBlock(false_block);
2726
2727         /* create the common block */
2728         ir_node *in_cf[2] = { true_jmp, false_jmp };
2729         new_Block(2, in_cf);
2730
2731         /* TODO improve static semantics, so either both or no values are NULL */
2732         if (true_val == NULL || false_val == NULL)
2733                 return NULL;
2734
2735         ir_node *in[2] = { true_val, false_val };
2736         ir_mode *mode  = get_irn_mode(true_val);
2737         assert(get_irn_mode(false_val) == mode);
2738         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2739
2740         return val;
2741 }
2742
2743 /**
2744  * Returns an IR-node representing the address of a field.
2745  */
2746 static ir_node *select_addr(const select_expression_t *expression)
2747 {
2748         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2749
2750         construct_select_compound(expression);
2751
2752         ir_node *compound_addr = expression_to_firm(expression->compound);
2753
2754         entity_t *entry = expression->compound_entry;
2755         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2756         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2757         ir_entity *irentity = entry->compound_member.entity;
2758
2759         assert(irentity != NULL);
2760
2761         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2762
2763         return sel;
2764 }
2765
2766 static ir_node *select_to_firm(const select_expression_t *expression)
2767 {
2768         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2769         ir_node  *addr = select_addr(expression);
2770         type_t   *type = revert_automatic_type_conversion(
2771                         (const expression_t*) expression);
2772         type           = skip_typeref(type);
2773
2774         entity_t *entry      = expression->compound_entry;
2775         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2776         type_t   *entry_type = skip_typeref(entry->declaration.type);
2777
2778         if (entry_type->kind == TYPE_BITFIELD) {
2779                 return bitfield_extract_to_firm(expression, addr);
2780         }
2781
2782         return deref_address(dbgi, type, addr);
2783 }
2784
2785 /* Values returned by __builtin_classify_type. */
2786 typedef enum gcc_type_class
2787 {
2788         no_type_class = -1,
2789         void_type_class,
2790         integer_type_class,
2791         char_type_class,
2792         enumeral_type_class,
2793         boolean_type_class,
2794         pointer_type_class,
2795         reference_type_class,
2796         offset_type_class,
2797         real_type_class,
2798         complex_type_class,
2799         function_type_class,
2800         method_type_class,
2801         record_type_class,
2802         union_type_class,
2803         array_type_class,
2804         string_type_class,
2805         set_type_class,
2806         file_type_class,
2807         lang_type_class
2808 } gcc_type_class;
2809
2810 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2811 {
2812         const type_t *const type = skip_typeref(expr->type_expression->base.type);
2813
2814         gcc_type_class tc;
2815         switch (type->kind)
2816         {
2817                 case TYPE_ATOMIC: {
2818                         const atomic_type_t *const atomic_type = &type->atomic;
2819                         switch (atomic_type->akind) {
2820                                 /* should not be reached */
2821                                 case ATOMIC_TYPE_INVALID:
2822                                         tc = no_type_class;
2823                                         goto make_const;
2824
2825                                 /* gcc cannot do that */
2826                                 case ATOMIC_TYPE_VOID:
2827                                         tc = void_type_class;
2828                                         goto make_const;
2829
2830                                 case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2831                                 case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2832                                 case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2833                                 case ATOMIC_TYPE_SHORT:
2834                                 case ATOMIC_TYPE_USHORT:
2835                                 case ATOMIC_TYPE_INT:
2836                                 case ATOMIC_TYPE_UINT:
2837                                 case ATOMIC_TYPE_LONG:
2838                                 case ATOMIC_TYPE_ULONG:
2839                                 case ATOMIC_TYPE_LONGLONG:
2840                                 case ATOMIC_TYPE_ULONGLONG:
2841                                 case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2842                                         tc = integer_type_class;
2843                                         goto make_const;
2844
2845                                 case ATOMIC_TYPE_FLOAT:
2846                                 case ATOMIC_TYPE_DOUBLE:
2847                                 case ATOMIC_TYPE_LONG_DOUBLE:
2848                                         tc = real_type_class;
2849                                         goto make_const;
2850                         }
2851                         panic("Unexpected atomic type in classify_type_to_firm().");
2852                 }
2853
2854                 case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2855                 case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2856                 case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2857                 case TYPE_ARRAY:           /* gcc handles this as pointer */
2858                 case TYPE_FUNCTION:        /* gcc handles this as pointer */
2859                 case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2860                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2861                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2862
2863                 /* gcc handles this as integer */
2864                 case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2865
2866                 case TYPE_BUILTIN:
2867                 /* typedef/typeof should be skipped already */
2868                 case TYPE_TYPEDEF:
2869                 case TYPE_TYPEOF:
2870                 case TYPE_INVALID:
2871                 case TYPE_ERROR:
2872                         break;
2873         }
2874         panic("unexpected TYPE classify_type_to_firm().");
2875
2876 make_const: ;
2877         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2878         ir_mode  *const mode = mode_int;
2879         tarval   *const tv   = new_tarval_from_long(tc, mode);
2880         return new_d_Const(dbgi, mode, tv);
2881 }
2882
2883 static ir_node *function_name_to_firm(
2884                 const funcname_expression_t *const expr)
2885 {
2886         switch(expr->kind) {
2887         case FUNCNAME_FUNCTION:
2888         case FUNCNAME_PRETTY_FUNCTION:
2889         case FUNCNAME_FUNCDNAME:
2890                 if (current_function_name == NULL) {
2891                         const source_position_t *const src_pos = &expr->base.source_position;
2892                         const char    *name  = current_function_entity->base.symbol->string;
2893                         const string_t string = { name, strlen(name) + 1 };
2894                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2895                 }
2896                 return current_function_name;
2897         case FUNCNAME_FUNCSIG:
2898                 if (current_funcsig == NULL) {
2899                         const source_position_t *const src_pos = &expr->base.source_position;
2900                         ir_entity *ent = get_irg_entity(current_ir_graph);
2901                         const char *const name = get_entity_ld_name(ent);
2902                         const string_t string = { name, strlen(name) + 1 };
2903                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2904                 }
2905                 return current_funcsig;
2906         }
2907         panic("Unsupported function name");
2908 }
2909
2910 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2911 {
2912         statement_t *statement = expr->statement;
2913
2914         assert(statement->kind == STATEMENT_COMPOUND);
2915         return compound_statement_to_firm(&statement->compound);
2916 }
2917
2918 static ir_node *va_start_expression_to_firm(
2919         const va_start_expression_t *const expr)
2920 {
2921         type_t    *const type        = current_function_entity->declaration.type;
2922         ir_type   *const method_type = get_ir_type(type);
2923         int        const n           = get_method_n_params(method_type) - 1;
2924         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2925         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2926         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2927         ir_node   *const no_mem      = new_NoMem();
2928         ir_node   *const arg_sel     =
2929                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2930
2931         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
2932         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2933         set_value_for_expression(expr->ap, add);
2934
2935         return NULL;
2936 }
2937
2938 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2939 {
2940         type_t       *const type    = expr->base.type;
2941         expression_t *const ap_expr = expr->ap;
2942         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2943         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2944         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2945         ir_node      *const res     = deref_address(dbgi, type, ap);
2946
2947         ir_node      *const cnst    = get_type_size(expr->base.type);
2948         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2949
2950         set_value_for_expression_addr(ap_expr, add, ap_addr);
2951
2952         return res;
2953 }
2954
2955 static ir_node *dereference_addr(const unary_expression_t *const expression)
2956 {
2957         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2958         return expression_to_firm(expression->value);
2959 }
2960
2961 /**
2962  * Returns a IR-node representing an lvalue of the given expression.
2963  */
2964 static ir_node *expression_to_addr(const expression_t *expression)
2965 {
2966         switch(expression->kind) {
2967         case EXPR_REFERENCE:
2968                 return reference_addr(&expression->reference);
2969         case EXPR_ARRAY_ACCESS:
2970                 return array_access_addr(&expression->array_access);
2971         case EXPR_SELECT:
2972                 return select_addr(&expression->select);
2973         case EXPR_CALL:
2974                 return call_expression_to_firm(&expression->call);
2975         case EXPR_UNARY_DEREFERENCE: {
2976                 return dereference_addr(&expression->unary);
2977         }
2978         default:
2979                 break;
2980         }
2981         panic("trying to get address of non-lvalue");
2982 }
2983
2984 static ir_node *builtin_constant_to_firm(
2985                 const builtin_constant_expression_t *expression)
2986 {
2987         ir_mode *mode = get_ir_mode(expression->base.type);
2988         long     v;
2989
2990         if (is_constant_expression(expression->value)) {
2991                 v = 1;
2992         } else {
2993                 v = 0;
2994         }
2995         return new_Const_long(mode, v);
2996 }
2997
2998 static ir_node *builtin_prefetch_to_firm(
2999                 const builtin_prefetch_expression_t *expression)
3000 {
3001         ir_node *adr = expression_to_firm(expression->adr);
3002         /* no Firm support for prefetch yet */
3003         (void) adr;
3004         return NULL;
3005 }
3006
3007 static ir_node *get_label_block(label_t *label)
3008 {
3009         if (label->block != NULL)
3010                 return label->block;
3011
3012         /* beware: might be called from create initializer with current_ir_graph
3013          * set to const_code_irg. */
3014         ir_graph *rem    = current_ir_graph;
3015         current_ir_graph = current_function;
3016
3017         ir_node *old_cur_block = get_cur_block();
3018         ir_node *block         = new_immBlock();
3019         set_cur_block(old_cur_block);
3020
3021         label->block = block;
3022
3023         ARR_APP1(label_t *, all_labels, label);
3024
3025         current_ir_graph = rem;
3026         return block;
3027 }
3028
3029 /**
3030  * Pointer to a label.  This is used for the
3031  * GNU address-of-label extension.
3032  */
3033 static ir_node *label_address_to_firm(
3034                 const label_address_expression_t *label)
3035 {
3036         ir_node    *block = get_label_block(label->label);
3037         ir_label_t  nr    = get_Block_label(block);
3038
3039         if (nr == 0) {
3040                 nr = get_irp_next_label_nr();
3041                 set_Block_label(block, nr);
3042         }
3043         symconst_symbol value;
3044         value.label = nr;
3045         return new_SymConst(mode_P_code, value, symconst_label);
3046 }
3047
3048 /**
3049  * creates firm nodes for an expression. The difference between this function
3050  * and expression_to_firm is, that this version might produce mode_b nodes
3051  * instead of mode_Is.
3052  */
3053 static ir_node *_expression_to_firm(const expression_t *expression)
3054 {
3055 #ifndef NDEBUG
3056         if (!constant_folding) {
3057                 assert(!expression->base.transformed);
3058                 ((expression_t*) expression)->base.transformed = true;
3059         }
3060 #endif
3061
3062         switch (expression->kind) {
3063         case EXPR_CHARACTER_CONSTANT:
3064                 return character_constant_to_firm(&expression->conste);
3065         case EXPR_WIDE_CHARACTER_CONSTANT:
3066                 return wide_character_constant_to_firm(&expression->conste);
3067         case EXPR_CONST:
3068                 return const_to_firm(&expression->conste);
3069         case EXPR_STRING_LITERAL:
3070                 return string_literal_to_firm(&expression->string);
3071         case EXPR_WIDE_STRING_LITERAL:
3072                 return wide_string_literal_to_firm(&expression->wide_string);
3073         case EXPR_REFERENCE:
3074                 return reference_expression_to_firm(&expression->reference);
3075         case EXPR_REFERENCE_ENUM_VALUE:
3076                 return reference_expression_enum_value_to_firm(&expression->reference);
3077         case EXPR_CALL:
3078                 return call_expression_to_firm(&expression->call);
3079         EXPR_UNARY_CASES
3080                 return unary_expression_to_firm(&expression->unary);
3081         EXPR_BINARY_CASES
3082                 return binary_expression_to_firm(&expression->binary);
3083         case EXPR_ARRAY_ACCESS:
3084                 return array_access_to_firm(&expression->array_access);
3085         case EXPR_SIZEOF:
3086                 return sizeof_to_firm(&expression->typeprop);
3087         case EXPR_ALIGNOF:
3088                 return alignof_to_firm(&expression->typeprop);
3089         case EXPR_CONDITIONAL:
3090                 return conditional_to_firm(&expression->conditional);
3091         case EXPR_SELECT:
3092                 return select_to_firm(&expression->select);
3093         case EXPR_CLASSIFY_TYPE:
3094                 return classify_type_to_firm(&expression->classify_type);
3095         case EXPR_FUNCNAME:
3096                 return function_name_to_firm(&expression->funcname);
3097         case EXPR_STATEMENT:
3098                 return statement_expression_to_firm(&expression->statement);
3099         case EXPR_VA_START:
3100                 return va_start_expression_to_firm(&expression->va_starte);
3101         case EXPR_VA_ARG:
3102                 return va_arg_expression_to_firm(&expression->va_arge);
3103         case EXPR_BUILTIN_SYMBOL:
3104                 panic("unimplemented expression found");
3105         case EXPR_BUILTIN_CONSTANT_P:
3106                 return builtin_constant_to_firm(&expression->builtin_constant);
3107         case EXPR_BUILTIN_PREFETCH:
3108                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3109         case EXPR_OFFSETOF:
3110                 return offsetof_to_firm(&expression->offsetofe);
3111         case EXPR_COMPOUND_LITERAL:
3112                 return compound_literal_to_firm(&expression->compound_literal);
3113         case EXPR_LABEL_ADDRESS:
3114                 return label_address_to_firm(&expression->label_address);
3115
3116         case EXPR_UNKNOWN:
3117         case EXPR_INVALID:
3118                 break;
3119         }
3120         panic("invalid expression found");
3121 }
3122
3123 static bool produces_mode_b(const expression_t *expression)
3124 {
3125         switch (expression->kind) {
3126         case EXPR_BINARY_EQUAL:
3127         case EXPR_BINARY_NOTEQUAL:
3128         case EXPR_BINARY_LESS:
3129         case EXPR_BINARY_LESSEQUAL:
3130         case EXPR_BINARY_GREATER:
3131         case EXPR_BINARY_GREATEREQUAL:
3132         case EXPR_BINARY_ISGREATER:
3133         case EXPR_BINARY_ISGREATEREQUAL:
3134         case EXPR_BINARY_ISLESS:
3135         case EXPR_BINARY_ISLESSEQUAL:
3136         case EXPR_BINARY_ISLESSGREATER:
3137         case EXPR_BINARY_ISUNORDERED:
3138         case EXPR_UNARY_NOT:
3139                 return true;
3140
3141         case EXPR_BINARY_BUILTIN_EXPECT:
3142                 return produces_mode_b(expression->binary.left);
3143         case EXPR_BINARY_COMMA:
3144                 return produces_mode_b(expression->binary.right);
3145
3146         default:
3147                 return false;
3148         }
3149 }
3150
3151 static ir_node *expression_to_firm(const expression_t *expression)
3152 {
3153         if (!produces_mode_b(expression)) {
3154                 ir_node *res = _expression_to_firm(expression);
3155                 assert(res == NULL || get_irn_mode(res) != mode_b);
3156                 return res;
3157         }
3158
3159         if (is_constant_expression(expression)) {
3160                 ir_node *res  = _expression_to_firm(expression);
3161                 ir_mode *mode = get_ir_mode(expression->base.type);
3162                 assert(is_Const(res));
3163                 if (is_Const_null(res)) {
3164                         return new_Const_long(mode, 0);
3165                 } else {
3166                         return new_Const_long(mode, 1);
3167                 }
3168         }
3169
3170         /* we have to produce a 0/1 from the mode_b expression */
3171         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3172         return produce_condition_result(expression, dbgi);
3173 }
3174
3175 /**
3176  * create a short-circuit expression evaluation that tries to construct
3177  * efficient control flow structures for &&, || and ! expressions
3178  */
3179 static ir_node *create_condition_evaluation(const expression_t *expression,
3180                                             ir_node *true_block,
3181                                             ir_node *false_block)
3182 {
3183         switch(expression->kind) {
3184         case EXPR_UNARY_NOT: {
3185                 const unary_expression_t *unary_expression = &expression->unary;
3186                 create_condition_evaluation(unary_expression->value, false_block,
3187                                             true_block);
3188                 return NULL;
3189         }
3190         case EXPR_BINARY_LOGICAL_AND: {
3191                 const binary_expression_t *binary_expression = &expression->binary;
3192
3193                 ir_node *cur_block   = get_cur_block();
3194                 ir_node *extra_block = new_immBlock();
3195                 set_cur_block(cur_block);
3196                 create_condition_evaluation(binary_expression->left, extra_block,
3197                                             false_block);
3198                 mature_immBlock(extra_block);
3199                 set_cur_block(extra_block);
3200                 create_condition_evaluation(binary_expression->right, true_block,
3201                                             false_block);
3202                 return NULL;
3203         }
3204         case EXPR_BINARY_LOGICAL_OR: {
3205                 const binary_expression_t *binary_expression = &expression->binary;
3206
3207                 ir_node *cur_block   = get_cur_block();
3208                 ir_node *extra_block = new_immBlock();
3209                 set_cur_block(cur_block);
3210                 create_condition_evaluation(binary_expression->left, true_block,
3211                                             extra_block);
3212                 mature_immBlock(extra_block);
3213                 set_cur_block(extra_block);
3214                 create_condition_evaluation(binary_expression->right, true_block,
3215                                             false_block);
3216                 return NULL;
3217         }
3218         default:
3219                 break;
3220         }
3221
3222         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3223         ir_node  *cond_expr  = _expression_to_firm(expression);
3224         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3225         ir_node  *cond       = new_d_Cond(dbgi, condition);
3226         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3227         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3228
3229         /* set branch prediction info based on __builtin_expect */
3230         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3231                 long               cnst = fold_constant(expression->binary.right);
3232                 cond_jmp_predicate pred;
3233
3234                 if (cnst == 0) {
3235                         pred = COND_JMP_PRED_FALSE;
3236                 } else {
3237                         pred = COND_JMP_PRED_TRUE;
3238                 }
3239                 set_Cond_jmp_pred(cond, pred);
3240         }
3241
3242         add_immBlock_pred(true_block, true_proj);
3243         if (false_block != NULL) {
3244                 add_immBlock_pred(false_block, false_proj);
3245         }
3246
3247         set_cur_block(NULL);
3248         return cond_expr;
3249 }
3250
3251
3252 static void create_variable_entity(entity_t *variable,
3253                                    declaration_kind_t declaration_kind,
3254                                    ir_type *parent_type)
3255 {
3256         assert(variable->kind == ENTITY_VARIABLE);
3257         type_t    *const type     = skip_typeref(variable->declaration.type);
3258         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3259         ir_type   *const irtype   = get_ir_type(type);
3260         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3261         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3262
3263         handle_gnu_attributes_ent(irentity, variable);
3264
3265         variable->declaration.kind  = (unsigned char) declaration_kind;
3266         variable->variable.v.entity = irentity;
3267         set_entity_variability(irentity, variability_uninitialized);
3268         set_entity_ld_ident(irentity, create_ld_ident(irentity, variable));
3269         if (parent_type == get_tls_type())
3270                 set_entity_allocation(irentity, allocation_automatic);
3271         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3272                 set_entity_allocation(irentity, allocation_static);
3273
3274         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3275                 set_entity_volatility(irentity, volatility_is_volatile);
3276         }
3277 }
3278
3279
3280 typedef struct type_path_entry_t type_path_entry_t;
3281 struct type_path_entry_t {
3282         type_t           *type;
3283         ir_initializer_t *initializer;
3284         size_t            index;
3285         entity_t         *compound_entry;
3286 };
3287
3288 typedef struct type_path_t type_path_t;
3289 struct type_path_t {
3290         type_path_entry_t *path;
3291         type_t            *top_type;
3292         bool               invalid;
3293 };
3294
3295 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3296 {
3297         size_t len = ARR_LEN(path->path);
3298
3299         for (size_t i = 0; i < len; ++i) {
3300                 const type_path_entry_t *entry = & path->path[i];
3301
3302                 type_t *type = skip_typeref(entry->type);
3303                 if (is_type_compound(type)) {
3304                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3305                 } else if (is_type_array(type)) {
3306                         fprintf(stderr, "[%zu]", entry->index);
3307                 } else {
3308                         fprintf(stderr, "-INVALID-");
3309                 }
3310         }
3311         fprintf(stderr, "  (");
3312         print_type(path->top_type);
3313         fprintf(stderr, ")");
3314 }
3315
3316 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3317 {
3318         size_t len = ARR_LEN(path->path);
3319         assert(len > 0);
3320         return & path->path[len-1];
3321 }
3322
3323 static type_path_entry_t *append_to_type_path(type_path_t *path)
3324 {
3325         size_t len = ARR_LEN(path->path);
3326         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3327
3328         type_path_entry_t *result = & path->path[len];
3329         memset(result, 0, sizeof(result[0]));
3330         return result;
3331 }
3332
3333 static size_t get_compound_member_count(const compound_type_t *type)
3334 {
3335         compound_t *compound  = type->compound;
3336         size_t      n_members = 0;
3337         entity_t   *member    = compound->members.entities;
3338         for ( ; member != NULL; member = member->base.next) {
3339                 ++n_members;
3340         }
3341
3342         return n_members;
3343 }
3344
3345 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3346 {
3347         type_t *orig_top_type = path->top_type;
3348         type_t *top_type      = skip_typeref(orig_top_type);
3349
3350         assert(is_type_compound(top_type) || is_type_array(top_type));
3351
3352         if (ARR_LEN(path->path) == 0) {
3353                 return NULL;
3354         } else {
3355                 type_path_entry_t *top         = get_type_path_top(path);
3356                 ir_initializer_t  *initializer = top->initializer;
3357                 return get_initializer_compound_value(initializer, top->index);
3358         }
3359 }
3360
3361 static void descend_into_subtype(type_path_t *path)
3362 {
3363         type_t *orig_top_type = path->top_type;
3364         type_t *top_type      = skip_typeref(orig_top_type);
3365
3366         assert(is_type_compound(top_type) || is_type_array(top_type));
3367
3368         ir_initializer_t *initializer = get_initializer_entry(path);
3369
3370         type_path_entry_t *top = append_to_type_path(path);
3371         top->type              = top_type;
3372
3373         size_t len;
3374
3375         if (is_type_compound(top_type)) {
3376                 compound_t *compound = top_type->compound.compound;
3377                 entity_t   *entry    = compound->members.entities;
3378
3379                 top->compound_entry = entry;
3380                 top->index          = 0;
3381                 len                 = get_compound_member_count(&top_type->compound);
3382                 if (entry != NULL) {
3383                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3384                         path->top_type = entry->declaration.type;
3385                 }
3386         } else {
3387                 assert(is_type_array(top_type));
3388                 assert(top_type->array.size > 0);
3389
3390                 top->index     = 0;
3391                 path->top_type = top_type->array.element_type;
3392                 len            = top_type->array.size;
3393         }
3394         if (initializer == NULL
3395                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3396                 initializer = create_initializer_compound(len);
3397                 /* we have to set the entry at the 2nd latest path entry... */
3398                 size_t path_len = ARR_LEN(path->path);
3399                 assert(path_len >= 1);
3400                 if (path_len > 1) {
3401                         type_path_entry_t *entry        = & path->path[path_len-2];
3402                         ir_initializer_t  *tinitializer = entry->initializer;
3403                         set_initializer_compound_value(tinitializer, entry->index,
3404                                                        initializer);
3405                 }
3406         }
3407         top->initializer = initializer;
3408 }
3409
3410 static void ascend_from_subtype(type_path_t *path)
3411 {
3412         type_path_entry_t *top = get_type_path_top(path);
3413
3414         path->top_type = top->type;
3415
3416         size_t len = ARR_LEN(path->path);
3417         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3418 }
3419
3420 static void walk_designator(type_path_t *path, const designator_t *designator)
3421 {
3422         /* designators start at current object type */
3423         ARR_RESIZE(type_path_entry_t, path->path, 1);
3424
3425         for ( ; designator != NULL; designator = designator->next) {
3426                 type_path_entry_t *top         = get_type_path_top(path);
3427                 type_t            *orig_type   = top->type;
3428                 type_t            *type        = skip_typeref(orig_type);
3429
3430                 if (designator->symbol != NULL) {
3431                         assert(is_type_compound(type));
3432                         size_t    index  = 0;
3433                         symbol_t *symbol = designator->symbol;
3434
3435                         compound_t *compound = type->compound.compound;
3436                         entity_t   *iter     = compound->members.entities;
3437                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3438                                 if (iter->base.symbol == symbol) {
3439                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3440                                         break;
3441                                 }
3442                         }
3443                         assert(iter != NULL);
3444
3445                         top->type           = orig_type;
3446                         top->compound_entry = iter;
3447                         top->index          = index;
3448                         orig_type           = iter->declaration.type;
3449                 } else {
3450                         expression_t *array_index = designator->array_index;
3451                         assert(designator->array_index != NULL);
3452                         assert(is_type_array(type));
3453
3454                         long index = fold_constant(array_index);
3455                         assert(index >= 0);
3456 #ifndef NDEBUG
3457                         if (type->array.size_constant) {
3458                                 long array_size = type->array.size;
3459                                 assert(index < array_size);
3460                         }
3461 #endif
3462
3463                         top->type  = orig_type;
3464                         top->index = (size_t) index;
3465                         orig_type  = type->array.element_type;
3466                 }
3467                 path->top_type = orig_type;
3468
3469                 if (designator->next != NULL) {
3470                         descend_into_subtype(path);
3471                 }
3472         }
3473
3474         path->invalid  = false;
3475 }
3476
3477 static void advance_current_object(type_path_t *path)
3478 {
3479         if (path->invalid) {
3480                 /* TODO: handle this... */
3481                 panic("invalid initializer in ast2firm (excessive elements)");
3482                 return;
3483         }
3484
3485         type_path_entry_t *top = get_type_path_top(path);
3486
3487         type_t *type = skip_typeref(top->type);
3488         if (is_type_union(type)) {
3489                 top->compound_entry = NULL;
3490         } else if (is_type_struct(type)) {
3491                 entity_t *entry = top->compound_entry;
3492
3493                 top->index++;
3494                 entry               = entry->base.next;
3495                 top->compound_entry = entry;
3496                 if (entry != NULL) {
3497                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3498                         path->top_type = entry->declaration.type;
3499                         return;
3500                 }
3501         } else {
3502                 assert(is_type_array(type));
3503
3504                 top->index++;
3505                 if (!type->array.size_constant || top->index < type->array.size) {
3506                         return;
3507                 }
3508         }
3509
3510         /* we're past the last member of the current sub-aggregate, try if we
3511          * can ascend in the type hierarchy and continue with another subobject */
3512         size_t len = ARR_LEN(path->path);
3513
3514         if (len > 1) {
3515                 ascend_from_subtype(path);
3516                 advance_current_object(path);
3517         } else {
3518                 path->invalid = true;
3519         }
3520 }
3521
3522
3523 static ir_initializer_t *create_ir_initializer(
3524                 const initializer_t *initializer, type_t *type);
3525
3526 static ir_initializer_t *create_ir_initializer_value(
3527                 const initializer_value_t *initializer)
3528 {
3529         if (is_type_compound(initializer->value->base.type)) {
3530                 panic("initializer creation for compounds not implemented yet");
3531         }
3532         ir_node *value = expression_to_firm(initializer->value);
3533         return create_initializer_const(value);
3534 }
3535
3536 static ir_initializer_t *create_ir_initializer_list(
3537                 const initializer_list_t *initializer, type_t *type)
3538 {
3539         type_path_t path;
3540         memset(&path, 0, sizeof(path));
3541         path.top_type = type;
3542         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3543
3544         descend_into_subtype(&path);
3545
3546         for (size_t i = 0; i < initializer->len; ++i) {
3547                 const initializer_t *sub_initializer = initializer->initializers[i];
3548
3549                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3550                         walk_designator(&path, sub_initializer->designator.designator);
3551                         continue;
3552                 }
3553
3554                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3555                         /* we might have to descend into types until we're at a scalar
3556                          * type */
3557                         while(true) {
3558                                 type_t *orig_top_type = path.top_type;
3559                                 type_t *top_type      = skip_typeref(orig_top_type);
3560
3561                                 if (is_type_scalar(top_type))
3562                                         break;
3563                                 descend_into_subtype(&path);
3564                         }
3565                 }
3566
3567                 ir_initializer_t *sub_irinitializer
3568                         = create_ir_initializer(sub_initializer, path.top_type);
3569
3570                 size_t path_len = ARR_LEN(path.path);
3571                 assert(path_len >= 1);
3572                 type_path_entry_t *entry        = & path.path[path_len-1];
3573                 ir_initializer_t  *tinitializer = entry->initializer;
3574                 set_initializer_compound_value(tinitializer, entry->index,
3575                                                sub_irinitializer);
3576
3577                 advance_current_object(&path);
3578         }
3579
3580         assert(ARR_LEN(path.path) >= 1);
3581         ir_initializer_t *result = path.path[0].initializer;
3582         DEL_ARR_F(path.path);
3583
3584         return result;
3585 }
3586
3587 static ir_initializer_t *create_ir_initializer_string(
3588                 const initializer_string_t *initializer, type_t *type)
3589 {
3590         type = skip_typeref(type);
3591
3592         size_t            string_len    = initializer->string.size;
3593         assert(type->kind == TYPE_ARRAY);
3594         assert(type->array.size_constant);
3595         size_t            len           = type->array.size;
3596         ir_initializer_t *irinitializer = create_initializer_compound(len);
3597
3598         const char *string = initializer->string.begin;
3599         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3600
3601         for (size_t i = 0; i < len; ++i) {
3602                 char c = 0;
3603                 if (i < string_len)
3604                         c = string[i];
3605
3606                 tarval           *tv = new_tarval_from_long(c, mode);
3607                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3608
3609                 set_initializer_compound_value(irinitializer, i, char_initializer);
3610         }
3611
3612         return irinitializer;
3613 }
3614
3615 static ir_initializer_t *create_ir_initializer_wide_string(
3616                 const initializer_wide_string_t *initializer, type_t *type)
3617 {
3618         size_t            string_len    = initializer->string.size;
3619         assert(type->kind == TYPE_ARRAY);
3620         assert(type->array.size_constant);
3621         size_t            len           = type->array.size;
3622         ir_initializer_t *irinitializer = create_initializer_compound(len);
3623
3624         const wchar_rep_t *string = initializer->string.begin;
3625         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3626
3627         for (size_t i = 0; i < len; ++i) {
3628                 wchar_rep_t c = 0;
3629                 if (i < string_len) {
3630                         c = string[i];
3631                 }
3632                 tarval *tv = new_tarval_from_long(c, mode);
3633                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3634
3635                 set_initializer_compound_value(irinitializer, i, char_initializer);
3636         }
3637
3638         return irinitializer;
3639 }
3640
3641 static ir_initializer_t *create_ir_initializer(
3642                 const initializer_t *initializer, type_t *type)
3643 {
3644         switch(initializer->kind) {
3645                 case INITIALIZER_STRING:
3646                         return create_ir_initializer_string(&initializer->string, type);
3647
3648                 case INITIALIZER_WIDE_STRING:
3649                         return create_ir_initializer_wide_string(&initializer->wide_string,
3650                                                                  type);
3651
3652                 case INITIALIZER_LIST:
3653                         return create_ir_initializer_list(&initializer->list, type);
3654
3655                 case INITIALIZER_VALUE:
3656                         return create_ir_initializer_value(&initializer->value);
3657
3658                 case INITIALIZER_DESIGNATOR:
3659                         panic("unexpected designator initializer found");
3660         }
3661         panic("unknown initializer");
3662 }
3663
3664 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3665                 ir_node *base_addr)
3666 {
3667         if (is_atomic_type(type)) {
3668                 ir_mode *mode = get_type_mode(type);
3669                 tarval  *zero = get_mode_null(mode);
3670                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3671
3672                 /* TODO: bitfields */
3673                 ir_node *mem    = get_store();
3674                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3675                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3676                 set_store(proj_m);
3677         } else {
3678                 assert(is_compound_type(type));
3679
3680                 int n_members;
3681                 if (is_Array_type(type)) {
3682                         assert(has_array_upper_bound(type, 0));
3683                         n_members = get_array_upper_bound_int(type, 0);
3684                 } else {
3685                         n_members = get_compound_n_members(type);
3686                 }
3687
3688                 for (int i = 0; i < n_members; ++i) {
3689                         ir_node *addr;
3690                         ir_type *irtype;
3691                         if (is_Array_type(type)) {
3692                                 ir_entity *entity   = get_array_element_entity(type);
3693                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3694                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3695                                 ir_node   *in[1]    = { cnst };
3696                                 irtype = get_array_element_type(type);
3697                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3698                         } else {
3699                                 ir_entity *member = get_compound_member(type, i);
3700
3701                                 irtype = get_entity_type(member);
3702                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3703                         }
3704
3705                         create_dynamic_null_initializer(irtype, dbgi, addr);
3706                 }
3707         }
3708 }
3709
3710 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3711                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3712 {
3713         switch(get_initializer_kind(initializer)) {
3714         case IR_INITIALIZER_NULL: {
3715                 create_dynamic_null_initializer(type, dbgi, base_addr);
3716                 return;
3717         }
3718         case IR_INITIALIZER_CONST: {
3719                 ir_node *node     = get_initializer_const_value(initializer);
3720                 ir_mode *mode     = get_irn_mode(node);
3721                 ir_type *ent_type = get_entity_type(entity);
3722
3723                 /* is it a bitfield type? */
3724                 if (is_Primitive_type(ent_type) &&
3725                                 get_primitive_base_type(ent_type) != NULL) {
3726                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3727                         return;
3728                 }
3729
3730                 assert(get_type_mode(type) == mode);
3731                 ir_node *mem    = get_store();
3732                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3733                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3734                 set_store(proj_m);
3735                 return;
3736         }
3737         case IR_INITIALIZER_TARVAL: {
3738                 tarval  *tv       = get_initializer_tarval_value(initializer);
3739                 ir_mode *mode     = get_tarval_mode(tv);
3740                 ir_node *cnst     = new_d_Const(dbgi, mode, tv);
3741                 ir_type *ent_type = get_entity_type(entity);
3742
3743                 /* is it a bitfield type? */
3744                 if (is_Primitive_type(ent_type) &&
3745                                 get_primitive_base_type(ent_type) != NULL) {
3746                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3747                         return;
3748                 }
3749
3750                 assert(get_type_mode(type) == mode);
3751                 ir_node *mem    = get_store();
3752                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3753                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3754                 set_store(proj_m);
3755                 return;
3756         }
3757         case IR_INITIALIZER_COMPOUND: {
3758                 assert(is_compound_type(type));
3759                 int n_members;
3760                 if (is_Array_type(type)) {
3761                         assert(has_array_upper_bound(type, 0));
3762                         n_members = get_array_upper_bound_int(type, 0);
3763                 } else {
3764                         n_members = get_compound_n_members(type);
3765                 }
3766
3767                 if (get_initializer_compound_n_entries(initializer)
3768                                 != (unsigned) n_members)
3769                         panic("initializer doesn't match compound type");
3770
3771                 for (int i = 0; i < n_members; ++i) {
3772                         ir_node   *addr;
3773                         ir_type   *irtype;
3774                         ir_entity *sub_entity;
3775                         if (is_Array_type(type)) {
3776                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3777                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3778                                 ir_node   *in[1]    = { cnst };
3779                                 irtype     = get_array_element_type(type);
3780                                 sub_entity = get_array_element_entity(type);
3781                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3782                                                        sub_entity);
3783                         } else {
3784                                 sub_entity = get_compound_member(type, i);
3785                                 irtype     = get_entity_type(sub_entity);
3786                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3787                                                              sub_entity);
3788                         }
3789
3790                         ir_initializer_t *sub_init
3791                                 = get_initializer_compound_value(initializer, i);
3792
3793                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3794                                                        addr);
3795                 }
3796                 return;
3797         }
3798         }
3799
3800         panic("invalid IR_INITIALIZER found");
3801 }
3802
3803 static void create_dynamic_initializer(ir_initializer_t *initializer,
3804                 dbg_info *dbgi, ir_entity *entity)
3805 {
3806         ir_node *frame     = get_local_frame(entity);
3807         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3808         ir_type *type      = get_entity_type(entity);
3809
3810         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3811 }
3812
3813 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3814                                      ir_entity *entity, type_t *type)
3815 {
3816         ir_node *memory = get_store();
3817         ir_node *nomem  = new_NoMem();
3818         ir_node *frame  = get_irg_frame(current_ir_graph);
3819         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3820
3821         if (initializer->kind == INITIALIZER_VALUE) {
3822                 initializer_value_t *initializer_value = &initializer->value;
3823
3824                 ir_node *value = expression_to_firm(initializer_value->value);
3825                 type = skip_typeref(type);
3826                 assign_value(dbgi, addr, type, value);
3827                 return;
3828         }
3829
3830         if (!is_constant_initializer(initializer)) {
3831                 ir_initializer_t *irinitializer
3832                         = create_ir_initializer(initializer, type);
3833
3834                 create_dynamic_initializer(irinitializer, dbgi, entity);
3835                 return;
3836         }
3837
3838         /* create the ir_initializer */
3839         ir_graph *const old_current_ir_graph = current_ir_graph;
3840         current_ir_graph = get_const_code_irg();
3841
3842         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3843
3844         assert(current_ir_graph == get_const_code_irg());
3845         current_ir_graph = old_current_ir_graph;
3846
3847         /* create a "template" entity which is copied to the entity on the stack */
3848         ident     *const id          = id_unique("initializer.%u");
3849         ir_type   *const irtype      = get_ir_type(type);
3850         ir_type   *const global_type = get_glob_type();
3851         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3852         set_entity_ld_ident(init_entity, id);
3853
3854         set_entity_variability(init_entity, variability_initialized);
3855         set_entity_visibility(init_entity, visibility_local);
3856         set_entity_allocation(init_entity, allocation_static);
3857
3858         set_entity_initializer(init_entity, irinitializer);
3859
3860         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3861         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3862
3863         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3864         set_store(copyb_mem);
3865 }
3866
3867 static void create_initializer_local_variable_entity(entity_t *entity)
3868 {
3869         assert(entity->kind == ENTITY_VARIABLE);
3870         initializer_t *initializer = entity->variable.initializer;
3871         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
3872         ir_entity     *irentity    = entity->variable.v.entity;
3873         type_t        *type        = entity->declaration.type;
3874         create_local_initializer(initializer, dbgi, irentity, type);
3875 }
3876
3877 static void create_variable_initializer(entity_t *entity)
3878 {
3879         assert(entity->kind == ENTITY_VARIABLE);
3880         initializer_t *initializer = entity->variable.initializer;
3881         if (initializer == NULL)
3882                 return;
3883
3884         declaration_kind_t declaration_kind
3885                 = (declaration_kind_t) entity->declaration.kind;
3886         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3887                 create_initializer_local_variable_entity(entity);
3888                 return;
3889         }
3890
3891         type_t            *type = entity->declaration.type;
3892         type_qualifiers_t  tq   = get_type_qualifier(type, true);
3893
3894         if (initializer->kind == INITIALIZER_VALUE) {
3895                 initializer_value_t *initializer_value = &initializer->value;
3896                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
3897
3898                 ir_node *value = expression_to_firm(initializer_value->value);
3899                 value = do_strict_conv(dbgi, value);
3900
3901                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3902                         set_value(entity->variable.v.value_number, value);
3903                 } else {
3904                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3905
3906                         ir_entity *irentity = entity->variable.v.entity;
3907
3908                         if (tq & TYPE_QUALIFIER_CONST) {
3909                                 set_entity_variability(irentity, variability_constant);
3910                         } else {
3911                                 set_entity_variability(irentity, variability_initialized);
3912                         }
3913                         set_atomic_ent_value(irentity, value);
3914                 }
3915         } else {
3916                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
3917                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3918
3919                 ir_entity        *irentity        = entity->variable.v.entity;
3920                 ir_initializer_t *irinitializer
3921                         = create_ir_initializer(initializer, type);
3922
3923                 if (tq & TYPE_QUALIFIER_CONST) {
3924                         set_entity_variability(irentity, variability_constant);
3925                 } else {
3926                         set_entity_variability(irentity, variability_initialized);
3927                 }
3928                 set_entity_initializer(irentity, irinitializer);
3929         }
3930 }
3931
3932 static void create_variable_length_array(entity_t *entity)
3933 {
3934         assert(entity->kind == ENTITY_VARIABLE);
3935         assert(entity->variable.initializer == NULL);
3936
3937         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3938         entity->variable.v.vla_base = NULL;
3939
3940         /* TODO: record VLA somewhere so we create the free node when we leave
3941          * it's scope */
3942 }
3943
3944 static void allocate_variable_length_array(entity_t *entity)
3945 {
3946         assert(entity->kind == ENTITY_VARIABLE);
3947         assert(entity->variable.initializer == NULL);
3948         assert(get_cur_block() != NULL);
3949
3950         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
3951         type_t   *type      = entity->declaration.type;
3952         ir_type  *el_type   = get_ir_type(type->array.element_type);
3953
3954         /* make sure size_node is calculated */
3955         get_type_size(type);
3956         ir_node  *elems = type->array.size_node;
3957         ir_node  *mem   = get_store();
3958         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3959
3960         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3961         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3962         set_store(proj_m);
3963
3964         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
3965         entity->variable.v.vla_base = addr;
3966 }
3967
3968 /**
3969  * Creates a Firm local variable from a declaration.
3970  */
3971 static void create_local_variable(entity_t *entity)
3972 {
3973         assert(entity->kind == ENTITY_VARIABLE);
3974         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
3975
3976         bool needs_entity = entity->variable.address_taken;
3977         type_t *type = skip_typeref(entity->declaration.type);
3978
3979         /* is it a variable length array? */
3980         if (is_type_array(type) && !type->array.size_constant) {
3981                 create_variable_length_array(entity);
3982                 return;
3983         } else if (is_type_array(type) || is_type_compound(type)) {
3984                 needs_entity = true;
3985         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3986                 needs_entity = true;
3987         }
3988
3989         if (needs_entity) {
3990                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3991                 create_variable_entity(entity,
3992                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3993                                        frame_type);
3994         } else {
3995                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
3996                 entity->variable.v.value_number = next_value_number_function;
3997                 set_irg_loc_description(current_ir_graph, next_value_number_function,
3998                                         (variable_t*) &entity->variable);
3999                 ++next_value_number_function;
4000         }
4001 }
4002
4003 static void create_local_static_variable(entity_t *entity)
4004 {
4005         assert(entity->kind == ENTITY_VARIABLE);
4006         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4007
4008         type_t    *const type        = skip_typeref(entity->declaration.type);
4009         ir_type   *const global_type = get_glob_type();
4010         ir_type   *const irtype      = get_ir_type(type);
4011         dbg_info  *const dbgi        = get_dbg_info(&entity->base.source_position);
4012
4013         size_t l = strlen(entity->base.symbol->string);
4014         char   buf[l + sizeof(".%u")];
4015         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4016         ident     *const id = id_unique(buf);
4017
4018         ir_entity *const irentity = new_d_entity(global_type, id, irtype, dbgi);
4019
4020         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4021                 set_entity_volatility(irentity, volatility_is_volatile);
4022         }
4023
4024         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4025         entity->variable.v.entity = irentity;
4026         set_entity_ld_ident(irentity, create_ld_ident(irentity, entity));
4027         set_entity_variability(irentity, variability_uninitialized);
4028         set_entity_visibility(irentity, visibility_local);
4029         set_entity_allocation(irentity, allocation_static);
4030
4031         ir_graph *const old_current_ir_graph = current_ir_graph;
4032         current_ir_graph = get_const_code_irg();
4033
4034         create_variable_initializer(entity);
4035
4036         assert(current_ir_graph == get_const_code_irg());
4037         current_ir_graph = old_current_ir_graph;
4038 }
4039
4040
4041
4042 static void return_statement_to_firm(return_statement_t *statement)
4043 {
4044         if (get_cur_block() == NULL)
4045                 return;
4046
4047         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4048         type_t   *type        = current_function_entity->declaration.type;
4049         ir_type  *func_irtype = get_ir_type(type);
4050
4051
4052         ir_node *in[1];
4053         int      in_len;
4054         if (get_method_n_ress(func_irtype) > 0) {
4055                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4056
4057                 if (statement->value != NULL) {
4058                         ir_node *node = expression_to_firm(statement->value);
4059                         node  = do_strict_conv(dbgi, node);
4060                         in[0] = node;
4061                 } else {
4062                         ir_mode *mode;
4063                         if (is_compound_type(res_type)) {
4064                                 mode = mode_P_data;
4065                         } else {
4066                                 mode = get_type_mode(res_type);
4067                         }
4068                         in[0] = new_Unknown(mode);
4069                 }
4070                 in_len = 1;
4071         } else {
4072                 /* build return_value for its side effects */
4073                 if (statement->value != NULL) {
4074                         expression_to_firm(statement->value);
4075                 }
4076                 in_len = 0;
4077         }
4078
4079         ir_node  *store = get_store();
4080         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4081
4082         ir_node *end_block = get_irg_end_block(current_ir_graph);
4083         add_immBlock_pred(end_block, ret);
4084
4085         set_cur_block(NULL);
4086 }
4087
4088 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4089 {
4090         if (get_cur_block() == NULL)
4091                 return NULL;
4092
4093         return expression_to_firm(statement->expression);
4094 }
4095
4096 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4097 {
4098         entity_t *entity = compound->scope.entities;
4099         for ( ; entity != NULL; entity = entity->base.next) {
4100                 if (!is_declaration(entity))
4101                         continue;
4102
4103                 create_local_declaration(entity);
4104         }
4105
4106         ir_node     *result    = NULL;
4107         statement_t *statement = compound->statements;
4108         for ( ; statement != NULL; statement = statement->base.next) {
4109                 if (statement->base.next == NULL
4110                                 && statement->kind == STATEMENT_EXPRESSION) {
4111                         result = expression_statement_to_firm(
4112                                         &statement->expression);
4113                         break;
4114                 }
4115                 statement_to_firm(statement);
4116         }
4117
4118         return result;
4119 }
4120
4121 static void create_global_variable(entity_t *entity)
4122 {
4123         assert(entity->kind == ENTITY_VARIABLE);
4124
4125         ir_visibility  vis;
4126         ir_type       *var_type;
4127         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4128                 case STORAGE_CLASS_STATIC:
4129                         vis = visibility_local;
4130                         goto global_var;
4131
4132                 case STORAGE_CLASS_EXTERN:
4133                         vis = visibility_external_allocated;
4134                         goto global_var;
4135
4136                 case STORAGE_CLASS_NONE:
4137                         vis = visibility_external_visible;
4138                         goto global_var;
4139
4140                 case STORAGE_CLASS_THREAD:
4141                         vis = visibility_external_visible;
4142                         goto tls_var;
4143
4144                 case STORAGE_CLASS_THREAD_EXTERN:
4145                         vis = visibility_external_allocated;
4146                         goto tls_var;
4147
4148                 case STORAGE_CLASS_THREAD_STATIC:
4149                         vis = visibility_local;
4150                         goto tls_var;
4151
4152 tls_var:
4153                         var_type = get_tls_type();
4154                         goto create_var;
4155
4156 global_var:
4157                         var_type = get_glob_type();
4158                         goto create_var;
4159
4160 create_var:
4161                         create_variable_entity(entity,
4162                                                DECLARATION_KIND_GLOBAL_VARIABLE,
4163                                                var_type);
4164                         /* Matze: I'm confused, shouldn't we only be here when creating
4165                          * variables? */
4166 #if 0
4167                         if (!is_type_function(skip_typeref(entity->declaration.type))) {
4168                                 set_entity_visibility(declaration->v.entity, vis);
4169                         }
4170 #else
4171                         set_entity_visibility(entity->variable.v.entity, vis);
4172 #endif
4173
4174                         return;
4175
4176                 case STORAGE_CLASS_TYPEDEF:
4177                 case STORAGE_CLASS_AUTO:
4178                 case STORAGE_CLASS_REGISTER:
4179                         break;
4180         }
4181         panic("Invalid storage class for global variable");
4182 }
4183
4184 static void create_local_declaration(entity_t *entity)
4185 {
4186         assert(is_declaration(entity));
4187
4188         /* construct type */
4189         (void) get_ir_type(entity->declaration.type);
4190         if (entity->base.symbol == NULL) {
4191                 return;
4192         }
4193
4194         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4195         case STORAGE_CLASS_STATIC:
4196                 create_local_static_variable(entity);
4197                 return;
4198         case STORAGE_CLASS_EXTERN:
4199                 if (entity->kind == ENTITY_FUNCTION) {
4200                         assert(entity->function.statement == NULL);
4201                         get_function_entity(entity);
4202                 } else {
4203                         create_global_variable(entity);
4204                         create_variable_initializer(entity);
4205                 }
4206                 return;
4207         case STORAGE_CLASS_NONE:
4208         case STORAGE_CLASS_AUTO:
4209         case STORAGE_CLASS_REGISTER:
4210                 if (entity->kind == ENTITY_FUNCTION) {
4211                         if (entity->function.statement != NULL) {
4212                                 get_function_entity(entity);
4213                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4214                                 enqueue_inner_function(entity);
4215                         } else {
4216                                 get_function_entity(entity);
4217                         }
4218                 } else {
4219                         create_local_variable(entity);
4220                 }
4221                 return;
4222         case STORAGE_CLASS_TYPEDEF:
4223         case STORAGE_CLASS_THREAD:
4224         case STORAGE_CLASS_THREAD_EXTERN:
4225         case STORAGE_CLASS_THREAD_STATIC:
4226                 break;
4227         }
4228         panic("invalid storage class found");
4229 }
4230
4231 static void initialize_local_declaration(entity_t *entity)
4232 {
4233         if (entity->base.symbol == NULL)
4234                 return;
4235
4236         switch ((declaration_kind_t) entity->declaration.kind) {
4237         case DECLARATION_KIND_LOCAL_VARIABLE:
4238         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4239                 create_variable_initializer(entity);
4240                 return;
4241
4242         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4243                 allocate_variable_length_array(entity);
4244                 return;
4245
4246         case DECLARATION_KIND_COMPOUND_MEMBER:
4247         case DECLARATION_KIND_GLOBAL_VARIABLE:
4248         case DECLARATION_KIND_FUNCTION:
4249         case DECLARATION_KIND_INNER_FUNCTION:
4250                 return;
4251
4252         case DECLARATION_KIND_UNKNOWN:
4253                 panic("can't initialize unknown declaration");
4254         }
4255         panic("invalid declaration kind");
4256 }
4257
4258 static void declaration_statement_to_firm(declaration_statement_t *statement)
4259 {
4260         entity_t *entity = statement->declarations_begin;
4261         entity_t *end    = statement->declarations_end->base.next;
4262         for ( ; entity != end; entity = entity->base.next) {
4263                 if (!is_declaration(entity))
4264                         continue;
4265                 initialize_local_declaration(entity);
4266         }
4267 }
4268
4269 static void if_statement_to_firm(if_statement_t *statement)
4270 {
4271         ir_node *cur_block = get_cur_block();
4272
4273         ir_node *fallthrough_block = NULL;
4274
4275         /* the true (blocks) */
4276         ir_node *true_block = NULL;
4277         if (statement->true_statement != NULL) {
4278                 true_block = new_immBlock();
4279                 statement_to_firm(statement->true_statement);
4280                 if (get_cur_block() != NULL) {
4281                         ir_node *jmp = new_Jmp();
4282                         if (fallthrough_block == NULL)
4283                                 fallthrough_block = new_immBlock();
4284                         add_immBlock_pred(fallthrough_block, jmp);
4285                 }
4286         }
4287
4288         /* the false (blocks) */
4289         ir_node *false_block = NULL;
4290         if (statement->false_statement != NULL) {
4291                 false_block = new_immBlock();
4292
4293                 statement_to_firm(statement->false_statement);
4294                 if (get_cur_block() != NULL) {
4295                         ir_node *jmp = new_Jmp();
4296                         if (fallthrough_block == NULL)
4297                                 fallthrough_block = new_immBlock();
4298                         add_immBlock_pred(fallthrough_block, jmp);
4299                 }
4300         }
4301
4302         /* create the condition */
4303         if (cur_block != NULL) {
4304                 if (true_block == NULL || false_block == NULL) {
4305                         if (fallthrough_block == NULL)
4306                                 fallthrough_block = new_immBlock();
4307                         if (true_block == NULL)
4308                                 true_block = fallthrough_block;
4309                         if (false_block == NULL)
4310                                 false_block = fallthrough_block;
4311                 }
4312
4313                 set_cur_block(cur_block);
4314                 create_condition_evaluation(statement->condition, true_block,
4315                                             false_block);
4316         }
4317
4318         mature_immBlock(true_block);
4319         if (false_block != fallthrough_block && false_block != NULL) {
4320                 mature_immBlock(false_block);
4321         }
4322         if (fallthrough_block != NULL) {
4323                 mature_immBlock(fallthrough_block);
4324         }
4325
4326         set_cur_block(fallthrough_block);
4327 }
4328
4329 static void while_statement_to_firm(while_statement_t *statement)
4330 {
4331         ir_node *jmp = NULL;
4332         if (get_cur_block() != NULL) {
4333                 jmp = new_Jmp();
4334         }
4335
4336         /* create the header block */
4337         ir_node *header_block = new_immBlock();
4338         if (jmp != NULL) {
4339                 add_immBlock_pred(header_block, jmp);
4340         }
4341
4342         /* the loop body */
4343         ir_node *old_continue_label = continue_label;
4344         ir_node *old_break_label    = break_label;
4345         continue_label              = header_block;
4346         break_label                 = NULL;
4347
4348         ir_node *body_block = new_immBlock();
4349         statement_to_firm(statement->body);
4350         ir_node *false_block = break_label;
4351
4352         assert(continue_label == header_block);
4353         continue_label = old_continue_label;
4354         break_label    = old_break_label;
4355
4356         if (get_cur_block() != NULL) {
4357                 jmp = new_Jmp();
4358                 add_immBlock_pred(header_block, jmp);
4359         }
4360
4361         /* shortcut for while(true) */
4362         if (is_constant_expression(statement->condition)
4363                         && fold_constant(statement->condition) != 0) {
4364                 set_cur_block(header_block);
4365                 ir_node *header_jmp = new_Jmp();
4366                 add_immBlock_pred(body_block, header_jmp);
4367
4368                 keep_alive(body_block);
4369                 keep_all_memory(body_block);
4370                 set_cur_block(body_block);
4371         } else {
4372                 if (false_block == NULL) {
4373                         false_block = new_immBlock();
4374                 }
4375
4376                 /* create the condition */
4377                 set_cur_block(header_block);
4378
4379                 create_condition_evaluation(statement->condition, body_block,
4380                                             false_block);
4381         }
4382
4383         mature_immBlock(body_block);
4384         mature_immBlock(header_block);
4385         if (false_block != NULL) {
4386                 mature_immBlock(false_block);
4387         }
4388
4389         set_cur_block(false_block);
4390 }
4391
4392 static void do_while_statement_to_firm(do_while_statement_t *statement)
4393 {
4394         ir_node *jmp = NULL;
4395         if (get_cur_block() != NULL) {
4396                 jmp = new_Jmp();
4397         }
4398
4399         /* create the header block */
4400         ir_node *header_block = new_immBlock();
4401
4402         /* the loop body */
4403         ir_node *body_block = new_immBlock();
4404         if (jmp != NULL) {
4405                 add_immBlock_pred(body_block, jmp);
4406         }
4407
4408         ir_node *old_continue_label = continue_label;
4409         ir_node *old_break_label    = break_label;
4410         continue_label              = header_block;
4411         break_label                 = NULL;
4412
4413         statement_to_firm(statement->body);
4414         ir_node *false_block = break_label;
4415
4416         assert(continue_label == header_block);
4417         continue_label = old_continue_label;
4418         break_label    = old_break_label;
4419
4420         if (get_cur_block() != NULL) {
4421                 ir_node *body_jmp = new_Jmp();
4422                 add_immBlock_pred(header_block, body_jmp);
4423                 mature_immBlock(header_block);
4424         }
4425
4426         if (false_block == NULL) {
4427                 false_block = new_immBlock();
4428         }
4429
4430         /* create the condition */
4431         set_cur_block(header_block);
4432
4433         create_condition_evaluation(statement->condition, body_block, false_block);
4434         mature_immBlock(body_block);
4435         mature_immBlock(header_block);
4436         if (false_block != NULL) {
4437                 mature_immBlock(false_block);
4438         }
4439
4440         set_cur_block(false_block);
4441 }
4442
4443 static void for_statement_to_firm(for_statement_t *statement)
4444 {
4445         ir_node *jmp = NULL;
4446
4447         /* create declarations */
4448         entity_t *entity = statement->scope.entities;
4449         for ( ; entity != NULL; entity = entity->base.next) {
4450                 if (!is_declaration(entity))
4451                         continue;
4452
4453                 create_local_declaration(entity);
4454         }
4455
4456         if (get_cur_block() != NULL) {
4457                 entity = statement->scope.entities;
4458                 for ( ; entity != NULL; entity = entity->base.next) {
4459                         if (!is_declaration(entity))
4460                                 continue;
4461
4462                         initialize_local_declaration(entity);
4463                 }
4464
4465                 if (statement->initialisation != NULL) {
4466                         expression_to_firm(statement->initialisation);
4467                 }
4468
4469                 jmp = new_Jmp();
4470         }
4471
4472
4473         /* create the step block */
4474         ir_node *const step_block = new_immBlock();
4475         if (statement->step != NULL) {
4476                 expression_to_firm(statement->step);
4477         }
4478         ir_node *const step_jmp = new_Jmp();
4479
4480         /* create the header block */
4481         ir_node *const header_block = new_immBlock();
4482         if (jmp != NULL) {
4483                 add_immBlock_pred(header_block, jmp);
4484         }
4485         add_immBlock_pred(header_block, step_jmp);
4486
4487         /* the false block */
4488         ir_node *const false_block = new_immBlock();
4489
4490         /* the loop body */
4491         ir_node * body_block;
4492         if (statement->body != NULL) {
4493                 ir_node *const old_continue_label = continue_label;
4494                 ir_node *const old_break_label    = break_label;
4495                 continue_label = step_block;
4496                 break_label    = false_block;
4497
4498                 body_block = new_immBlock();
4499                 statement_to_firm(statement->body);
4500
4501                 assert(continue_label == step_block);
4502                 assert(break_label    == false_block);
4503                 continue_label = old_continue_label;
4504                 break_label    = old_break_label;
4505
4506                 if (get_cur_block() != NULL) {
4507                         jmp = new_Jmp();
4508                         add_immBlock_pred(step_block, jmp);
4509                 }
4510         } else {
4511                 body_block = step_block;
4512         }
4513
4514         /* create the condition */
4515         set_cur_block(header_block);
4516         if (statement->condition != NULL) {
4517                 create_condition_evaluation(statement->condition, body_block,
4518                                             false_block);
4519         } else {
4520                 keep_alive(header_block);
4521                 keep_all_memory(header_block);
4522                 jmp = new_Jmp();
4523                 add_immBlock_pred(body_block, jmp);
4524         }
4525
4526         mature_immBlock(body_block);
4527         mature_immBlock(false_block);
4528         mature_immBlock(step_block);
4529         mature_immBlock(header_block);
4530         mature_immBlock(false_block);
4531
4532         set_cur_block(false_block);
4533 }
4534
4535 static void create_jump_statement(const statement_t *statement,
4536                                   ir_node *target_block)
4537 {
4538         if (get_cur_block() == NULL)
4539                 return;
4540
4541         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4542         ir_node  *jump = new_d_Jmp(dbgi);
4543         add_immBlock_pred(target_block, jump);
4544
4545         set_cur_block(NULL);
4546 }
4547
4548 static ir_node *get_break_label(void)
4549 {
4550         if (break_label == NULL) {
4551                 ir_node *cur_block = get_cur_block();
4552                 break_label = new_immBlock();
4553                 set_cur_block(cur_block);
4554         }
4555         return break_label;
4556 }
4557
4558 static void switch_statement_to_firm(switch_statement_t *statement)
4559 {
4560         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4561
4562         ir_node *expression  = expression_to_firm(statement->expression);
4563         ir_node *cond        = new_d_Cond(dbgi, expression);
4564
4565         set_cur_block(NULL);
4566
4567         ir_node *const old_switch_cond       = current_switch_cond;
4568         ir_node *const old_break_label       = break_label;
4569         const bool     old_saw_default_label = saw_default_label;
4570         saw_default_label                    = false;
4571         current_switch_cond                  = cond;
4572         break_label                          = NULL;
4573         switch_statement_t *const old_switch = current_switch;
4574         current_switch                       = statement;
4575
4576         /* determine a free number for the default label */
4577         unsigned long num_cases = 0;
4578         long def_nr = 0;
4579         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4580                 if (l->expression == NULL) {
4581                         /* default case */
4582                         continue;
4583                 }
4584                 if (l->last_case >= l->first_case)
4585                         num_cases += l->last_case - l->first_case + 1;
4586                 if (l->last_case > def_nr)
4587                         def_nr = l->last_case;
4588         }
4589
4590         if (def_nr == INT_MAX) {
4591                 /* Bad: an overflow will occurr, we cannot be sure that the
4592                  * maximum + 1 is a free number. Scan the values a second
4593                  * time to find a free number.
4594                  */
4595                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4596
4597                 memset(bits, 0, (num_cases + 7) >> 3);
4598                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4599                         if (l->expression == NULL) {
4600                                 /* default case */
4601                                 continue;
4602                         }
4603                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4604                         if (start < num_cases && l->last_case >= 0) {
4605                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4606                                         (unsigned long)l->last_case : num_cases - 1;
4607                                 for (unsigned long cns = start; cns <= end; ++cns) {
4608                                         bits[cns >> 3] |= (1 << (cns & 7));
4609                                 }
4610                         }
4611                 }
4612                 /* We look at the first num_cases constants:
4613                  * Either they are densed, so we took the last (num_cases)
4614                  * one, or they are non densed, so we will find one free
4615                  * there...
4616                  */
4617                 unsigned long i;
4618                 for (i = 0; i < num_cases; ++i)
4619                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4620                                 break;
4621
4622                 free(bits);
4623                 def_nr = i;
4624         } else {
4625                 ++def_nr;
4626         }
4627         statement->default_proj_nr = def_nr;
4628
4629         if (statement->body != NULL) {
4630                 statement_to_firm(statement->body);
4631         }
4632
4633         if (get_cur_block() != NULL) {
4634                 ir_node *jmp = new_Jmp();
4635                 add_immBlock_pred(get_break_label(), jmp);
4636         }
4637
4638         if (!saw_default_label) {
4639                 set_cur_block(get_nodes_block(cond));
4640                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4641                                                         statement->default_proj_nr);
4642                 add_immBlock_pred(get_break_label(), proj);
4643         }
4644
4645         if (break_label != NULL) {
4646                 mature_immBlock(break_label);
4647         }
4648         set_cur_block(break_label);
4649
4650         assert(current_switch_cond == cond);
4651         current_switch      = old_switch;
4652         current_switch_cond = old_switch_cond;
4653         break_label         = old_break_label;
4654         saw_default_label   = old_saw_default_label;
4655 }
4656
4657 static void case_label_to_firm(const case_label_statement_t *statement)
4658 {
4659         if (statement->is_empty_range)
4660                 return;
4661
4662         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4663
4664         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4665
4666         ir_node *proj;
4667         ir_node *old_block = get_nodes_block(current_switch_cond);
4668         ir_node *block     = new_immBlock();
4669
4670         set_cur_block(old_block);
4671         if (statement->expression != NULL) {
4672                 long pn     = statement->first_case;
4673                 long end_pn = statement->last_case;
4674                 assert(pn <= end_pn);
4675                 /* create jumps for all cases in the given range */
4676                 do {
4677                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4678                         add_immBlock_pred(block, proj);
4679                 } while(pn++ < end_pn);
4680         } else {
4681                 saw_default_label = true;
4682                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4683                                          current_switch->default_proj_nr);
4684
4685                 add_immBlock_pred(block, proj);
4686         }
4687
4688         if (fallthrough != NULL) {
4689                 add_immBlock_pred(block, fallthrough);
4690         }
4691         mature_immBlock(block);
4692         set_cur_block(block);
4693
4694         if (statement->statement != NULL) {
4695                 statement_to_firm(statement->statement);
4696         }
4697 }
4698
4699 static void label_to_firm(const label_statement_t *statement)
4700 {
4701         ir_node *block = get_label_block(statement->label);
4702
4703         if (get_cur_block() != NULL) {
4704                 ir_node *jmp = new_Jmp();
4705                 add_immBlock_pred(block, jmp);
4706         }
4707
4708         set_cur_block(block);
4709         keep_alive(block);
4710         keep_all_memory(block);
4711
4712         if (statement->statement != NULL) {
4713                 statement_to_firm(statement->statement);
4714         }
4715 }
4716
4717 static void goto_to_firm(const goto_statement_t *statement)
4718 {
4719         if (get_cur_block() == NULL)
4720                 return;
4721
4722         if (statement->expression) {
4723                 ir_node  *irn  = expression_to_firm(statement->expression);
4724                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4725                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4726
4727                 set_irn_link(ijmp, ijmp_list);
4728                 ijmp_list = ijmp;
4729         } else {
4730                 ir_node *block = get_label_block(statement->label);
4731                 ir_node *jmp   = new_Jmp();
4732                 add_immBlock_pred(block, jmp);
4733         }
4734         set_cur_block(NULL);
4735 }
4736
4737 static void asm_statement_to_firm(const asm_statement_t *statement)
4738 {
4739         bool needs_memory = false;
4740
4741         if (statement->is_volatile) {
4742                 needs_memory = true;
4743         }
4744
4745         size_t         n_clobbers = 0;
4746         asm_clobber_t *clobber    = statement->clobbers;
4747         for ( ; clobber != NULL; clobber = clobber->next) {
4748                 const char *clobber_str = clobber->clobber.begin;
4749
4750                 if (!be_is_valid_clobber(clobber_str)) {
4751                         errorf(&statement->base.source_position,
4752                                    "invalid clobber '%s' specified", clobber->clobber);
4753                         continue;
4754                 }
4755
4756                 if (strcmp(clobber_str, "memory") == 0) {
4757                         needs_memory = true;
4758                         continue;
4759                 }
4760
4761                 ident *id = new_id_from_str(clobber_str);
4762                 obstack_ptr_grow(&asm_obst, id);
4763                 ++n_clobbers;
4764         }
4765         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4766         ident **clobbers = NULL;
4767         if (n_clobbers > 0) {
4768                 clobbers = obstack_finish(&asm_obst);
4769         }
4770
4771         size_t n_inputs  = 0;
4772         asm_argument_t *argument = statement->inputs;
4773         for ( ; argument != NULL; argument = argument->next)
4774                 n_inputs++;
4775         size_t n_outputs = 0;
4776         argument = statement->outputs;
4777         for ( ; argument != NULL; argument = argument->next)
4778                 n_outputs++;
4779
4780         unsigned next_pos = 0;
4781
4782         ir_node *ins[n_inputs + n_outputs + 1];
4783         size_t   in_size = 0;
4784
4785         ir_asm_constraint tmp_in_constraints[n_outputs];
4786
4787         const expression_t *out_exprs[n_outputs];
4788         ir_node            *out_addrs[n_outputs];
4789         size_t              out_size = 0;
4790
4791         argument = statement->outputs;
4792         for ( ; argument != NULL; argument = argument->next) {
4793                 const char *constraints = argument->constraints.begin;
4794                 asm_constraint_flags_t asm_flags
4795                         = be_parse_asm_constraints(constraints);
4796
4797                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4798                         errorf(&statement->base.source_position,
4799                                "some constraints in '%s' are not supported", constraints);
4800                         continue;
4801                 }
4802                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4803                         errorf(&statement->base.source_position,
4804                                "some constraints in '%s' are invalid", constraints);
4805                         continue;
4806                 }
4807                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4808                         errorf(&statement->base.source_position,
4809                                "no write flag specified for output constraints '%s'",
4810                                constraints);
4811                         continue;
4812                 }
4813
4814                 unsigned pos = next_pos++;
4815                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4816                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4817                         expression_t *expr = argument->expression;
4818                         ir_node      *addr = expression_to_addr(expr);
4819                         /* in+output, construct an artifical same_as constraint on the
4820                          * input */
4821                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4822                                 char     buf[64];
4823                                 ir_node *value = get_value_from_lvalue(expr, addr);
4824
4825                                 snprintf(buf, sizeof(buf), "%u", pos);
4826
4827                                 ir_asm_constraint constraint;
4828                                 constraint.pos              = pos;
4829                                 constraint.constraint       = new_id_from_str(buf);
4830                                 constraint.mode             = get_ir_mode(expr->base.type);
4831                                 tmp_in_constraints[in_size] = constraint;
4832                                 ins[in_size] = value;
4833
4834                                 ++in_size;
4835                         }
4836
4837                         out_exprs[out_size] = expr;
4838                         out_addrs[out_size] = addr;
4839                         ++out_size;
4840                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4841                         /* pure memory ops need no input (but we have to make sure we
4842                          * attach to the memory) */
4843                         assert(! (asm_flags &
4844                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4845                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4846                         needs_memory = true;
4847
4848                         /* we need to attach the address to the inputs */
4849                         expression_t *expr = argument->expression;
4850
4851                         ir_asm_constraint constraint;
4852                         constraint.pos              = pos;
4853                         constraint.constraint       = new_id_from_str(constraints);
4854                         constraint.mode             = NULL;
4855                         tmp_in_constraints[in_size] = constraint;
4856
4857                         ins[in_size]          = expression_to_addr(expr);
4858                         ++in_size;
4859                         continue;
4860                 } else {
4861                         errorf(&statement->base.source_position,
4862                                "only modifiers but no place set in constraints '%s'",
4863                                constraints);
4864                         continue;
4865                 }
4866
4867                 ir_asm_constraint constraint;
4868                 constraint.pos        = pos;
4869                 constraint.constraint = new_id_from_str(constraints);
4870                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4871
4872                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4873         }
4874         assert(obstack_object_size(&asm_obst)
4875                         == out_size * sizeof(ir_asm_constraint));
4876         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4877
4878
4879         obstack_grow(&asm_obst, tmp_in_constraints,
4880                      in_size * sizeof(tmp_in_constraints[0]));
4881         /* find and count input and output arguments */
4882         argument = statement->inputs;
4883         for ( ; argument != NULL; argument = argument->next) {
4884                 const char *constraints = argument->constraints.begin;
4885                 asm_constraint_flags_t asm_flags
4886                         = be_parse_asm_constraints(constraints);
4887
4888                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4889                         errorf(&statement->base.source_position,
4890                                "some constraints in '%s' are not supported", constraints);
4891                         continue;
4892                 }
4893                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4894                         errorf(&statement->base.source_position,
4895                                "some constraints in '%s' are invalid", constraints);
4896                         continue;
4897                 }
4898                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4899                         errorf(&statement->base.source_position,
4900                                "write flag specified for input constraints '%s'",
4901                                constraints);
4902                         continue;
4903                 }
4904
4905                 ir_node *input;
4906                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4907                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4908                         /* we can treat this as "normal" input */
4909                         input = expression_to_firm(argument->expression);
4910                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4911                         /* pure memory ops need no input (but we have to make sure we
4912                          * attach to the memory) */
4913                         assert(! (asm_flags &
4914                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4915                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4916                         needs_memory = true;
4917                         input = expression_to_addr(argument->expression);
4918                 } else {
4919                         errorf(&statement->base.source_position,
4920                                "only modifiers but no place set in constraints '%s'",
4921                                constraints);
4922                         continue;
4923                 }
4924
4925                 ir_asm_constraint constraint;
4926                 constraint.pos        = next_pos++;
4927                 constraint.constraint = new_id_from_str(constraints);
4928                 constraint.mode       = get_irn_mode(input);
4929
4930                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4931                 ins[in_size++] = input;
4932         }
4933
4934         if (needs_memory) {
4935                 ir_asm_constraint constraint;
4936                 constraint.pos        = next_pos++;
4937                 constraint.constraint = new_id_from_str("");
4938                 constraint.mode       = mode_M;
4939
4940                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4941                 ins[in_size++] = get_store();
4942         }
4943
4944         assert(obstack_object_size(&asm_obst)
4945                         == in_size * sizeof(ir_asm_constraint));
4946         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4947
4948         /* create asm node */
4949         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4950
4951         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4952
4953         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4954                                   out_size, output_constraints,
4955                                   n_clobbers, clobbers, asm_text);
4956
4957         if (statement->is_volatile) {
4958                 set_irn_pinned(node, op_pin_state_pinned);
4959         } else {
4960                 set_irn_pinned(node, op_pin_state_floats);
4961         }
4962
4963         /* create output projs & connect them */
4964         if (needs_memory) {
4965                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4966                 set_store(projm);
4967         }
4968
4969         size_t i;
4970         for (i = 0; i < out_size; ++i) {
4971                 const expression_t *out_expr = out_exprs[i];
4972                 long                pn       = i;
4973                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4974                 ir_node            *proj     = new_Proj(node, mode, pn);
4975                 ir_node            *addr     = out_addrs[i];
4976
4977                 set_value_for_expression_addr(out_expr, proj, addr);
4978         }
4979 }
4980
4981 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4982         statement_to_firm(statement->try_statement);
4983         warningf(&statement->base.source_position, "structured exception handling ignored");
4984 }
4985
4986 static void     leave_statement_to_firm(leave_statement_t *statement) {
4987         errorf(&statement->base.source_position, "__leave not supported yet");
4988 }
4989
4990 /**
4991  * Transform a statement.
4992  */
4993 static void statement_to_firm(statement_t *statement)
4994 {
4995 #ifndef NDEBUG
4996         assert(!statement->base.transformed);
4997         statement->base.transformed = true;
4998 #endif
4999
5000         switch (statement->kind) {
5001         case STATEMENT_INVALID:
5002                 panic("invalid statement found");
5003                 return;
5004         case STATEMENT_EMPTY:
5005                 /* nothing */
5006                 return;
5007         case STATEMENT_COMPOUND:
5008                 compound_statement_to_firm(&statement->compound);
5009                 return;
5010         case STATEMENT_RETURN:
5011                 return_statement_to_firm(&statement->returns);
5012                 return;
5013         case STATEMENT_EXPRESSION:
5014                 expression_statement_to_firm(&statement->expression);
5015                 return;
5016         case STATEMENT_IF:
5017                 if_statement_to_firm(&statement->ifs);
5018                 return;
5019         case STATEMENT_WHILE:
5020                 while_statement_to_firm(&statement->whiles);
5021                 return;
5022         case STATEMENT_DO_WHILE:
5023                 do_while_statement_to_firm(&statement->do_while);
5024                 return;
5025         case STATEMENT_DECLARATION:
5026                 declaration_statement_to_firm(&statement->declaration);
5027                 return;
5028         case STATEMENT_BREAK:
5029                 create_jump_statement(statement, get_break_label());
5030                 return;
5031         case STATEMENT_CONTINUE:
5032                 create_jump_statement(statement, continue_label);
5033                 return;
5034         case STATEMENT_SWITCH:
5035                 switch_statement_to_firm(&statement->switchs);
5036                 return;
5037         case STATEMENT_CASE_LABEL:
5038                 case_label_to_firm(&statement->case_label);
5039                 return;
5040         case STATEMENT_FOR:
5041                 for_statement_to_firm(&statement->fors);
5042                 return;
5043         case STATEMENT_LABEL:
5044                 label_to_firm(&statement->label);
5045                 return;
5046         case STATEMENT_LOCAL_LABEL:
5047                 /* local labels transform the semantics of labels while parsing
5048                  * they don't need any special treatment here */
5049                 return;
5050         case STATEMENT_GOTO:
5051                 goto_to_firm(&statement->gotos);
5052                 return;
5053         case STATEMENT_ASM:
5054                 asm_statement_to_firm(&statement->asms);
5055                 return;
5056         case STATEMENT_MS_TRY:
5057                 ms_try_statement_to_firm(&statement->ms_try);
5058                 return;
5059         case STATEMENT_LEAVE:
5060                 leave_statement_to_firm(&statement->leave);
5061                 return;
5062         }
5063         panic("Statement not implemented\n");
5064 }
5065
5066 static int count_local_variables(const entity_t *entity,
5067                                  const entity_t *const end)
5068 {
5069         int count = 0;
5070         for (; entity != end; entity = entity->base.next) {
5071                 if (entity->kind != ENTITY_VARIABLE)
5072                         continue;
5073                 type_t *type = skip_typeref(entity->declaration.type);
5074
5075                 if (!entity->variable.address_taken && is_type_scalar(type))
5076                         ++count;
5077         }
5078         return count;
5079 }
5080
5081 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5082 {
5083         int *const count = env;
5084
5085         switch (stmt->kind) {
5086         case STATEMENT_DECLARATION: {
5087                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5088                 *count += count_local_variables(decl_stmt->declarations_begin,
5089                                                                                 decl_stmt->declarations_end->base.next);
5090                 break;
5091         }
5092
5093         case STATEMENT_FOR:
5094                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5095                 break;
5096
5097         default:
5098                 break;
5099         }
5100 }
5101
5102 static int get_function_n_local_vars(entity_t *entity)
5103 {
5104         int count = 0;
5105
5106         /* count parameters */
5107         count += count_local_variables(entity->function.parameters.entities, NULL);
5108
5109         /* count local variables declared in body */
5110         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5111                         &count);
5112         return count;
5113 }
5114
5115 static void initialize_function_parameters(entity_t *entity)
5116 {
5117         assert(entity->kind == ENTITY_FUNCTION);
5118         ir_graph *irg             = current_ir_graph;
5119         ir_node  *args            = get_irg_args(irg);
5120         ir_node  *start_block     = get_irg_start_block(irg);
5121         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5122
5123         int       n         = 0;
5124         entity_t *parameter = entity->function.parameters.entities;
5125         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5126                 assert(parameter->kind == ENTITY_VARIABLE);
5127                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5128                 type_t *type = skip_typeref(parameter->declaration.type);
5129
5130                 bool needs_entity = parameter->variable.address_taken;
5131                 assert(!is_type_array(type));
5132                 if (is_type_compound(type)) {
5133                         needs_entity = true;
5134                 }
5135
5136                 if (needs_entity) {
5137                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5138                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5139                         set_entity_ident(entity, id);
5140
5141                         parameter->declaration.kind
5142                                 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
5143                         parameter->variable.v.entity = entity;
5144                         continue;
5145                 }
5146
5147                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5148                 ir_mode *param_mode   = get_type_mode(param_irtype);
5149
5150                 long     pn    = n;
5151                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5152
5153                 ir_mode *mode = get_ir_mode(type);
5154                 value = create_conv(NULL, value, mode);
5155                 value = do_strict_conv(NULL, value);
5156
5157                 parameter->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
5158                 parameter->variable.v.value_number = next_value_number_function;
5159                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5160                                         (variable_t*) &parameter->variable);
5161                 ++next_value_number_function;
5162
5163                 set_value(parameter->variable.v.value_number, value);
5164         }
5165 }
5166
5167 /**
5168  * Handle additional decl modifiers for IR-graphs
5169  *
5170  * @param irg            the IR-graph
5171  * @param dec_modifiers  additional modifiers
5172  */
5173 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5174 {
5175         if (decl_modifiers & DM_NORETURN) {
5176                 /* TRUE if the declaration includes the Microsoft
5177                    __declspec(noreturn) specifier. */
5178                 set_irg_additional_property(irg, mtp_property_noreturn);
5179         }
5180         if (decl_modifiers & DM_NOTHROW) {
5181                 /* TRUE if the declaration includes the Microsoft
5182                    __declspec(nothrow) specifier. */
5183                 set_irg_additional_property(irg, mtp_property_nothrow);
5184         }
5185         if (decl_modifiers & DM_NAKED) {
5186                 /* TRUE if the declaration includes the Microsoft
5187                    __declspec(naked) specifier. */
5188                 set_irg_additional_property(irg, mtp_property_naked);
5189         }
5190         if (decl_modifiers & DM_FORCEINLINE) {
5191                 /* TRUE if the declaration includes the
5192                    Microsoft __forceinline specifier. */
5193                 set_irg_inline_property(irg, irg_inline_forced);
5194         }
5195         if (decl_modifiers & DM_NOINLINE) {
5196                 /* TRUE if the declaration includes the Microsoft
5197                    __declspec(noinline) specifier. */
5198                 set_irg_inline_property(irg, irg_inline_forbidden);
5199         }
5200 }
5201
5202 static void add_function_pointer(ir_type *segment, ir_entity *method,
5203                                  const char *unique_template)
5204 {
5205         ir_type   *method_type  = get_entity_type(method);
5206         ident     *id           = id_unique(unique_template);
5207         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5208
5209         ident     *ide          = id_unique(unique_template);
5210         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5211         ir_graph  *irg          = get_const_code_irg();
5212         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5213                                                            method, NULL);
5214
5215         set_entity_compiler_generated(ptr, 1);
5216         set_entity_variability(ptr, variability_constant);
5217         set_atomic_ent_value(ptr, val);
5218 }
5219
5220 /**
5221  * Generate possible IJmp branches to a given label block.
5222  */
5223 static void gen_ijmp_branches(ir_node *block) {
5224         ir_node *ijmp;
5225         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5226                 add_immBlock_pred(block, ijmp);
5227         }
5228 }
5229
5230 /**
5231  * Create code for a function.
5232  */
5233 static void create_function(entity_t *entity)
5234 {
5235         assert(entity->kind == ENTITY_FUNCTION);
5236         ir_entity *function_entity = get_function_entity(entity);
5237
5238         if (entity->function.statement == NULL)
5239                 return;
5240
5241         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5242                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5243                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5244         }
5245         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5246                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5247                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5248         }
5249
5250         current_function_entity = entity;
5251         current_function_name   = NULL;
5252         current_funcsig         = NULL;
5253
5254         assert(all_labels == NULL);
5255         all_labels = NEW_ARR_F(label_t *, 0);
5256         ijmp_list  = NULL;
5257
5258         int       n_local_vars = get_function_n_local_vars(entity);
5259         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5260
5261         ir_graph *old_current_function = current_function;
5262         current_function = irg;
5263
5264         set_irg_fp_model(irg, firm_opt.fp_model);
5265         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5266         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5267
5268         ir_node *first_block = get_cur_block();
5269
5270         /* set inline flags */
5271         if (entity->function.is_inline)
5272                 set_irg_inline_property(irg, irg_inline_recomended);
5273         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5274
5275         next_value_number_function = 0;
5276         initialize_function_parameters(entity);
5277
5278         statement_to_firm(entity->function.statement);
5279
5280         ir_node *end_block = get_irg_end_block(irg);
5281
5282         /* do we have a return statement yet? */
5283         if (get_cur_block() != NULL) {
5284                 type_t *type = skip_typeref(entity->declaration.type);
5285                 assert(is_type_function(type));
5286                 const function_type_t *func_type   = &type->function;
5287                 const type_t          *return_type
5288                         = skip_typeref(func_type->return_type);
5289
5290                 ir_node *ret;
5291                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5292                         ret = new_Return(get_store(), 0, NULL);
5293                 } else {
5294                         ir_mode *mode;
5295                         if (is_type_scalar(return_type)) {
5296                                 mode = get_ir_mode(func_type->return_type);
5297                         } else {
5298                                 mode = mode_P_data;
5299                         }
5300
5301                         ir_node *in[1];
5302                         /* §5.1.2.2.3 main implicitly returns 0 */
5303                         if (strcmp(entity->base.symbol->string, "main") == 0) {
5304                                 in[0] = new_Const(mode, get_mode_null(mode));
5305                         } else {
5306                                 in[0] = new_Unknown(mode);
5307                         }
5308                         ret = new_Return(get_store(), 1, in);
5309                 }
5310                 add_immBlock_pred(end_block, ret);
5311         }
5312
5313         bool has_computed_gotos = false;
5314         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5315                 label_t *label = all_labels[i];
5316                 if (label->address_taken) {
5317                         gen_ijmp_branches(label->block);
5318                         has_computed_gotos = true;
5319                 }
5320                 mature_immBlock(label->block);
5321         }
5322         if (has_computed_gotos) {
5323                 /* if we have computed goto's in the function, we cannot inline it */
5324                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5325                         warningf(&entity->base.source_position,
5326                                  "function '%Y' can never be inlined because it contains a computed goto",
5327                                  entity->base.symbol);
5328                 }
5329                 set_irg_inline_property(irg, irg_inline_forbidden);
5330         }
5331
5332         DEL_ARR_F(all_labels);
5333         all_labels = NULL;
5334
5335         mature_immBlock(first_block);
5336         mature_immBlock(end_block);
5337
5338         irg_finalize_cons(irg);
5339
5340         /* finalize the frame type */
5341         ir_type *frame_type = get_irg_frame_type(irg);
5342         int      n          = get_compound_n_members(frame_type);
5343         int      align_all  = 4;
5344         int      offset     = 0;
5345         for (int i = 0; i < n; ++i) {
5346                 ir_entity *entity      = get_compound_member(frame_type, i);
5347                 ir_type   *entity_type = get_entity_type(entity);
5348
5349                 int align = get_type_alignment_bytes(entity_type);
5350                 if (align > align_all)
5351                         align_all = align;
5352                 int misalign = 0;
5353                 if (align > 0) {
5354                         misalign  = offset % align;
5355                         if (misalign > 0) {
5356                                 offset += align - misalign;
5357                         }
5358                 }
5359
5360                 set_entity_offset(entity, offset);
5361                 offset += get_type_size_bytes(entity_type);
5362         }
5363         set_type_size_bytes(frame_type, offset);
5364         set_type_alignment_bytes(frame_type, align_all);
5365
5366         irg_vrfy(irg);
5367         current_function = old_current_function;
5368
5369         /* create inner functions */
5370         entity_t *inner;
5371         for (inner = next_inner_function(); inner != NULL;
5372              inner = next_inner_function()) {
5373                 create_function(inner);
5374         }
5375 }
5376
5377 static void scope_to_firm(scope_t *scope)
5378 {
5379         /* first pass: create declarations */
5380         entity_t *entity = scope->entities;
5381         for ( ; entity != NULL; entity = entity->base.next) {
5382                 if (entity->base.symbol == NULL)
5383                         continue;
5384
5385                 if (entity->kind == ENTITY_FUNCTION) {
5386                         get_function_entity(entity);
5387                 } else if (entity->kind == ENTITY_VARIABLE) {
5388                         create_global_variable(entity);
5389                 }
5390         }
5391
5392         /* second pass: create code/initializers */
5393         entity = scope->entities;
5394         for ( ; entity != NULL; entity = entity->base.next) {
5395                 if (entity->base.symbol == NULL)
5396                         continue;
5397
5398                 if (entity->kind == ENTITY_FUNCTION) {
5399                         create_function(entity);
5400                 } else if (entity->kind == ENTITY_VARIABLE) {
5401                         assert(entity->declaration.kind
5402                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5403                         current_ir_graph = get_const_code_irg();
5404                         create_variable_initializer(entity);
5405                 }
5406         }
5407 }
5408
5409 static void set_be_option(const char *option)
5410 {
5411         int res = firm_be_option(option);
5412         assert(res);
5413 }
5414
5415 void init_ast2firm(void)
5416 {
5417         obstack_init(&asm_obst);
5418         init_atomic_modes();
5419
5420         id_underscore = new_id_from_chars("_", 1);
5421         id_imp        = new_id_from_chars("__imp_", 6);
5422
5423         /* OS option must be set to the backend */
5424         switch (firm_opt.os_support) {
5425         case OS_SUPPORT_MINGW:
5426                 create_ld_ident = create_ld_ident_win32;
5427                 set_be_option("ia32-gasmode=mingw");
5428                 break;
5429         case OS_SUPPORT_LINUX:
5430                 create_ld_ident = create_ld_ident_linux_elf;
5431                 set_be_option("ia32-gasmode=elf");
5432                 break;
5433         case OS_SUPPORT_MACHO:
5434                 create_ld_ident = create_ld_ident_macho;
5435                 set_be_option("ia32-gasmode=macho");
5436                 set_be_option("ia32-stackalign=4");
5437                 set_be_option("pic");
5438                 break;
5439         }
5440
5441         /* create idents for all known runtime functions */
5442         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5443                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5444         }
5445
5446         entitymap_init(&entitymap);
5447 }
5448
5449 static void init_ir_types(void)
5450 {
5451         static int ir_types_initialized = 0;
5452         if (ir_types_initialized)
5453                 return;
5454         ir_types_initialized = 1;
5455
5456         ir_type_int        = get_ir_type(type_int);
5457         ir_type_const_char = get_ir_type(type_const_char);
5458         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5459         ir_type_void       = get_ir_type(type_void);
5460 }
5461
5462 void exit_ast2firm(void)
5463 {
5464         entitymap_destroy(&entitymap);
5465         obstack_free(&asm_obst, NULL);
5466 }
5467
5468 static void global_asm_to_firm(statement_t *s)
5469 {
5470         for (; s != NULL; s = s->base.next) {
5471                 assert(s->kind == STATEMENT_ASM);
5472
5473                 char const *const text = s->asms.asm_text.begin;
5474                 size_t            size = s->asms.asm_text.size;
5475
5476                 /* skip the last \0 */
5477                 if (text[size - 1] == '\0')
5478                         --size;
5479
5480                 ident *const id = new_id_from_chars(text, size);
5481                 add_irp_asm(id);
5482         }
5483 }
5484
5485 void translation_unit_to_firm(translation_unit_t *unit)
5486 {
5487         /* just to be sure */
5488         continue_label      = NULL;
5489         break_label         = NULL;
5490         current_switch_cond = NULL;
5491
5492         init_ir_types();
5493         inner_functions = NEW_ARR_F(entity_t *, 0);
5494
5495         scope_to_firm(&unit->scope);
5496         global_asm_to_firm(unit->global_asm);
5497
5498         DEL_ARR_F(inner_functions);
5499         inner_functions  = NULL;
5500
5501         current_ir_graph = NULL;
5502 }