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 "type_hash.h"
  45 #include "mangle.h"
  46 #include "walk_statements.h"
  47 #include "warning.h"
  48 #include "entitymap_t.h"
  49 #include "driver/firm_opt.h"
  50 #include "driver/firm_cmdline.h"
  51
  52 static ir_type *ir_type_const_char;
  53 static ir_type *ir_type_wchar_t;
  54 static ir_type *ir_type_void;
  55 static ir_type *ir_type_int;
  56
  57 static int        next_value_number_function;
  58 static ir_node   *continue_label;
  59 static ir_node   *break_label;
  60 static ir_node   *current_switch_cond;
  61 static bool       saw_default_label;
  62 static label_t  **all_labels;
  63 static entity_t **inner_functions;
  64 static ir_node   *ijmp_list;
  65 static bool       constant_folding;
  66
  67 extern bool       have_const_functions;
  68
  69 static const entity_t     *current_function_entity;
  70 static ir_node            *current_function_name;
  71 static ir_node            *current_funcsig;
  72 static switch_statement_t *current_switch;
  73 static ir_graph           *current_function;
  74 static translation_unit_t *current_translation_unit;
  75
  76 static entitymap_t  entitymap;
  77
  78 static struct obstack asm_obst;
  79
  80 typedef enum declaration_kind_t {
  81         DECLARATION_KIND_UNKNOWN,
  82         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
  83         DECLARATION_KIND_GLOBAL_VARIABLE,
  84         DECLARATION_KIND_LOCAL_VARIABLE,
  85         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
  86         DECLARATION_KIND_PARAMETER,
  87         DECLARATION_KIND_PARAMETER_ENTITY,
  88         DECLARATION_KIND_FUNCTION,
  89         DECLARATION_KIND_COMPOUND_MEMBER,
  90         DECLARATION_KIND_INNER_FUNCTION
  91 } declaration_kind_t;
  92
  93 static ir_mode *get_ir_mode(type_t *type);
  94 static ir_type *get_ir_type_incomplete(type_t *type);
  95
  96 static void enqueue_inner_function(entity_t *entity)
  97 {
  98         ARR_APP1(entity_t*, inner_functions, entity);
  99 }
 100
 101 static entity_t *next_inner_function(void)
 102 {
 103         int len = ARR_LEN(inner_functions);
 104         if (len == 0)
 105                 return NULL;
 106
 107         entity_t *entity = inner_functions[len-1];
 108         ARR_SHRINKLEN(inner_functions, len-1);
 109
 110         return entity;
 111 }
 112
 113 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 114 {
 115         const entity_t *entity = get_irg_loc_description(irg, pos);
 116
 117         if (entity != NULL) {
 118                 warningf(&entity->base.source_position,
 119                          "%s '%#T' might be used uninitialized",
 120                          get_entity_kind_name(entity->kind),
 121                          entity->declaration.type, entity->base.symbol);
 122         }
 123         return new_r_Unknown(irg, mode);
 124 }
 125
 126 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
 127 {
 128         const source_position_t *pos = (const source_position_t*) dbg;
 129         if (pos == NULL)
 130                 return 0;
 131         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
 132                                    pos->linenr);
 133 }
 134
 135 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 136 {
 137         const source_position_t *pos = (const source_position_t*) dbg;
 138         if (pos == NULL)
 139                 return NULL;
 140         if (line != NULL)
 141                 *line = pos->linenr;
 142         return pos->input_name;
 143 }
 144
 145 static dbg_info *get_dbg_info(const source_position_t *pos)
 146 {
 147         return (dbg_info*) pos;
 148 }
 149
 150 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 151
 152 static ir_mode *mode_int, *mode_uint;
 153
 154 static ir_node *_expression_to_firm(const expression_t *expression);
 155 static ir_node *expression_to_firm(const expression_t *expression);
 156 static void create_local_declaration(entity_t *entity);
 157
 158 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 159 {
 160         unsigned flags = get_atomic_type_flags(kind);
 161         unsigned size  = get_atomic_type_size(kind);
 162         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 163                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 164                 char            name[64];
 165                 ir_mode_sort    sort;
 166                 unsigned        bit_size     = size * 8;
 167                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 168                 ir_mode_arithmetic arithmetic;
 169
 170                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 171                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 172                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 173                                  bit_size);
 174                         sort         = irms_int_number;
 175                         arithmetic   = irma_twos_complement;
 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                 }
 182                 /* note: modulo_shift is 0, as in C it's undefined anyway to shift
 183                  * a too big amount */
 184                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 185                                    0);
 186         }
 187
 188         return NULL;
 189 }
 190
 191 /**
 192  * Initialises the atomic modes depending on the machine size.
 193  */
 194 static void init_atomic_modes(void)
 195 {
 196         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 197                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 198         }
 199         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 200         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 201
 202         /* there's no real void type in firm */
 203         atomic_modes[ATOMIC_TYPE_VOID] = mode_int;
 204
 205         /* initialize pointer modes */
 206         char            name[64];
 207         ir_mode_sort    sort         = irms_reference;
 208         unsigned        bit_size     = machine_size;
 209         bool            is_signed    = 0;
 210         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 211         unsigned        modulo_shift
 212                 = bit_size < machine_size ? machine_size : bit_size;
 213
 214         snprintf(name, sizeof(name), "p%u", machine_size);
 215         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 216                                         modulo_shift);
 217
 218         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 219         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 220
 221         /* Hmm, pointers should be machine size */
 222         set_modeP_data(ptr_mode);
 223         set_modeP_code(ptr_mode);
 224 }
 225
 226 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 227 {
 228         assert(kind <= ATOMIC_TYPE_LAST);
 229         return atomic_modes[kind];
 230 }
 231
 232 static unsigned get_compound_type_size(compound_type_t *type)
 233 {
 234         ir_type *irtype = get_ir_type((type_t*) type);
 235         return get_type_size_bytes(irtype);
 236 }
 237
 238 static unsigned get_array_type_size(array_type_t *type)
 239 {
 240         assert(!type->is_vla);
 241         ir_type *irtype = get_ir_type((type_t*) type);
 242         return get_type_size_bytes(irtype);
 243 }
 244
 245 static unsigned get_type_size_const(type_t *type)
 246 {
 247         switch(type->kind) {
 248         case TYPE_ERROR:
 249                 panic("error type occurred");
 250         case TYPE_ATOMIC:
 251                 return get_atomic_type_size(type->atomic.akind);
 252         case TYPE_COMPLEX:
 253                 return 2 * get_atomic_type_size(type->complex.akind);
 254         case TYPE_IMAGINARY:
 255                 return get_atomic_type_size(type->imaginary.akind);
 256         case TYPE_ENUM:
 257                 return get_mode_size_bytes(mode_int);
 258         case TYPE_COMPOUND_UNION:
 259         case TYPE_COMPOUND_STRUCT:
 260                 return get_compound_type_size(&type->compound);
 261         case TYPE_FUNCTION:
 262                 /* just a pointer to the function */
 263                 return get_mode_size_bytes(mode_P_code);
 264         case TYPE_POINTER:
 265         case TYPE_REFERENCE:
 266                 return get_mode_size_bytes(mode_P_data);
 267         case TYPE_ARRAY:
 268                 return get_array_type_size(&type->array);
 269         case TYPE_BUILTIN:
 270                 return get_type_size_const(type->builtin.real_type);
 271         case TYPE_BITFIELD:
 272                 panic("type size of bitfield request");
 273         case TYPE_TYPEDEF:
 274         case TYPE_TYPEOF:
 275         case TYPE_INVALID:
 276                 break;
 277         }
 278         panic("Trying to determine size of invalid type");
 279 }
 280
 281 static ir_node *get_type_size(type_t *type)
 282 {
 283         type = skip_typeref(type);
 284
 285         if (is_type_array(type) && type->array.is_vla) {
 286                 ir_node *size_node = type->array.size_node;
 287                 if (size_node == NULL) {
 288                         size_node = expression_to_firm(type->array.size_expression);
 289                         assert(!is_Const(size_node));
 290                         type->array.size_node = size_node;
 291                 }
 292
 293                 ir_node *elem_size = get_type_size(type->array.element_type);
 294                 ir_mode *mode      = get_irn_mode(size_node);
 295                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 296                 return real_size;
 297         }
 298
 299         ir_mode *mode = get_ir_mode(type_size_t);
 300         symconst_symbol sym;
 301         sym.type_p = get_ir_type(type);
 302         return new_SymConst(mode, sym, symconst_type_size);
 303 }
 304
 305 static unsigned count_parameters(const function_type_t *function_type)
 306 {
 307         unsigned count = 0;
 308
 309         function_parameter_t *parameter = function_type->parameters;
 310         for ( ; parameter != NULL; parameter = parameter->next) {
 311                 ++count;
 312         }
 313
 314         return count;
 315 }
 316
 317 /**
 318  * Creates a Firm type for an atomic type
 319  */
 320 static ir_type *create_atomic_type(const atomic_type_t *type)
 321 {
 322         atomic_type_kind_t  kind   = type->akind;
 323         ir_mode            *mode   = atomic_modes[kind];
 324         ident              *id     = get_mode_ident(mode);
 325         ir_type            *irtype = new_type_primitive(id, mode);
 326
 327         set_type_alignment_bytes(irtype, type->base.alignment);
 328
 329         return irtype;
 330 }
 331
 332 /**
 333  * Creates a Firm type for a complex type
 334  */
 335 static ir_type *create_complex_type(const complex_type_t *type)
 336 {
 337         atomic_type_kind_t  kind = type->akind;
 338         ir_mode            *mode = atomic_modes[kind];
 339         ident              *id   = get_mode_ident(mode);
 340
 341         (void) id;
 342
 343         /* FIXME: finish the array */
 344         return NULL;
 345 }
 346
 347 /**
 348  * Creates a Firm type for an imaginary type
 349  */
 350 static ir_type *create_imaginary_type(const imaginary_type_t *type)
 351 {
 352         atomic_type_kind_t  kind      = type->akind;
 353         ir_mode            *mode      = atomic_modes[kind];
 354         ident              *id        = get_mode_ident(mode);
 355         ir_type            *irtype    = new_type_primitive(id, mode);
 356
 357         set_type_alignment_bytes(irtype, type->base.alignment);
 358
 359         return irtype;
 360 }
 361
 362 /**
 363  * return type of a parameter (and take transparent union gnu extension into
 364  * account)
 365  */
 366 static type_t *get_parameter_type(type_t *type)
 367 {
 368         type = skip_typeref(type);
 369         if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
 370                 compound_t *compound = type->compound.compound;
 371                 type                 = compound->members.entities->declaration.type;
 372         }
 373
 374         return type;
 375 }
 376
 377 static ir_type *create_method_type(const function_type_t *function_type)
 378 {
 379         type_t  *return_type  = skip_typeref(function_type->return_type);
 380
 381         ident   *id           = id_unique("functiontype.%u");
 382         int      n_parameters = count_parameters(function_type);
 383         int      n_results    = return_type == type_void ? 0 : 1;
 384         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 385
 386         if (return_type != type_void) {
 387                 ir_type *restype = get_ir_type(return_type);
 388                 set_method_res_type(irtype, 0, restype);
 389         }
 390
 391         function_parameter_t *parameter = function_type->parameters;
 392         int                   n         = 0;
 393         for ( ; parameter != NULL; parameter = parameter->next) {
 394                 type_t  *type     = get_parameter_type(parameter->type);
 395                 ir_type *p_irtype = get_ir_type(type);
 396                 set_method_param_type(irtype, n, p_irtype);
 397                 ++n;
 398         }
 399
 400         if (function_type->variadic || function_type->unspecified_parameters) {
 401                 set_method_variadicity(irtype, variadicity_variadic);
 402         }
 403
 404         unsigned cc = get_method_calling_convention(irtype);
 405         switch (function_type->calling_convention) {
 406         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 407         case CC_CDECL:
 408 is_cdecl:
 409                 set_method_calling_convention(irtype, SET_CDECL(cc));
 410                 break;
 411
 412         case CC_STDCALL:
 413                 if (function_type->variadic || function_type->unspecified_parameters)
 414                         goto is_cdecl;
 415
 416                 /* only non-variadic function can use stdcall, else use cdecl */
 417                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 418                 break;
 419
 420         case CC_FASTCALL:
 421                 if (function_type->variadic || function_type->unspecified_parameters)
 422                         goto is_cdecl;
 423                 /* only non-variadic function can use fastcall, else use cdecl */
 424                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 425                 break;
 426
 427         case CC_THISCALL:
 428                 /* Hmm, leave default, not accepted by the parser yet. */
 429                 break;
 430         }
 431
 432         return irtype;
 433 }
 434
 435 static ir_type *create_pointer_type(pointer_type_t *type)
 436 {
 437         type_t   *points_to    = type->points_to;
 438         ir_type  *ir_points_to = get_ir_type_incomplete(points_to);
 439         ir_type  *ir_type      = new_type_pointer(id_unique("pointer.%u"),
 440                                                   ir_points_to, mode_P_data);
 441
 442         return ir_type;
 443 }
 444
 445 static ir_type *create_reference_type(reference_type_t *type)
 446 {
 447         type_t  *refers_to    = type->refers_to;
 448         ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
 449         ir_type *ir_type      = new_type_pointer(id_unique("reference.%u"),
 450                                                  ir_refers_to, mode_P_data);
 451
 452         return ir_type;
 453 }
 454
 455 static ir_type *create_array_type(array_type_t *type)
 456 {
 457         type_t  *element_type    = type->element_type;
 458         ir_type *ir_element_type = get_ir_type(element_type);
 459
 460         ident    *id      = id_unique("array.%u");
 461         ir_type  *ir_type = new_type_array(id, 1, ir_element_type);
 462
 463         const int align = get_type_alignment_bytes(ir_element_type);
 464         set_type_alignment_bytes(ir_type, align);
 465
 466         if (type->size_constant) {
 467                 int n_elements = type->size;
 468
 469                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 470
 471                 size_t elemsize = get_type_size_bytes(ir_element_type);
 472                 if (elemsize % align > 0) {
 473                         elemsize += align - (elemsize % align);
 474                 }
 475                 set_type_size_bytes(ir_type, n_elements * elemsize);
 476         } else {
 477                 set_array_lower_bound_int(ir_type, 0, 0);
 478         }
 479         set_type_state(ir_type, layout_fixed);
 480
 481         return ir_type;
 482 }
 483
 484 /**
 485  * Return the signed integer type of size bits.
 486  *
 487  * @param size   the size
 488  */
 489 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 490                                                  unsigned size)
 491 {
 492         static ir_mode *s_modes[64 + 1] = {NULL, };
 493         ir_type *res;
 494         ir_mode *mode;
 495
 496         if (size <= 0 || size > 64)
 497                 return NULL;
 498
 499         mode = s_modes[size];
 500         if (mode == NULL) {
 501                 char name[32];
 502
 503                 snprintf(name, sizeof(name), "bf_I%u", size);
 504                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 505                                    size <= 32 ? 32 : size );
 506                 s_modes[size] = mode;
 507         }
 508
 509         char name[32];
 510         snprintf(name, sizeof(name), "I%u", size);
 511         ident *id = new_id_from_str(name);
 512         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 513         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 514         set_primitive_base_type(res, base_tp);
 515
 516         return res;
 517 }
 518
 519 /**
 520  * Return the unsigned integer type of size bits.
 521  *
 522  * @param size   the size
 523  */
 524 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 525                                                    unsigned size)
 526 {
 527         static ir_mode *u_modes[64 + 1] = {NULL, };
 528         ir_type *res;
 529         ir_mode *mode;
 530
 531         if (size <= 0 || size > 64)
 532                 return NULL;
 533
 534         mode = u_modes[size];
 535         if (mode == NULL) {
 536                 char name[32];
 537
 538                 snprintf(name, sizeof(name), "bf_U%u", size);
 539                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 540                                    size <= 32 ? 32 : size );
 541                 u_modes[size] = mode;
 542         }
 543
 544         char name[32];
 545
 546         snprintf(name, sizeof(name), "U%u", size);
 547         ident *id = new_id_from_str(name);
 548         dbg_info *dbgi = get_dbg_info(&builtin_source_position);
 549         res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
 550         set_primitive_base_type(res, base_tp);
 551
 552         return res;
 553 }
 554
 555 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 556 {
 557         type_t *base = skip_typeref(type->base_type);
 558         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 559         ir_type *irbase = get_ir_type(base);
 560
 561         unsigned size = type->bit_size;
 562
 563         assert(!is_type_float(base));
 564         if (is_type_signed(base)) {
 565                 return get_signed_int_type_for_bit_size(irbase, size);
 566         } else {
 567                 return get_unsigned_int_type_for_bit_size(irbase, size);
 568         }
 569 }
 570
 571 #define INVALID_TYPE ((ir_type_ptr)-1)
 572
 573 enum {
 574         COMPOUND_IS_STRUCT = false,
 575         COMPOUND_IS_UNION  = true
 576 };
 577
 578 /**
 579  * Construct firm type from ast struct type.
 580  *
 581  * As anonymous inner structs get flattened to a single firm type, we might get
 582  * irtype, outer_offset and out_align passed (they represent the position of
 583  * the anonymous inner struct inside the resulting firm struct)
 584  */
 585 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
 586                                      size_t *outer_offset, size_t *outer_align,
 587                                      bool incomplete, bool is_union)
 588 {
 589         compound_t *compound = type->compound;
 590
 591         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 592                 return compound->irtype;
 593         }
 594
 595         size_t align_all  = 1;
 596         size_t offset     = 0;
 597         size_t bit_offset = 0;
 598         size_t size       = 0;
 599
 600         if (irtype == NULL) {
 601                 symbol_t *symbol = compound->base.symbol;
 602                 ident    *id;
 603                 if (symbol != NULL) {
 604                         id = new_id_from_str(symbol->string);
 605                 } else {
 606                         if (is_union) {
 607                                 id = id_unique("__anonymous_union.%u");
 608                         } else {
 609                                 id = id_unique("__anonymous_struct.%u");
 610                         }
 611                 }
 612                 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
 613
 614                 if (is_union) {
 615                         irtype = new_d_type_union(id, dbgi);
 616                 } else {
 617                         irtype = new_d_type_struct(id, dbgi);
 618                 }
 619
 620                 compound->irtype_complete = false;
 621                 compound->irtype          = irtype;
 622         } else {
 623                 offset    = *outer_offset;
 624                 align_all = *outer_align;
 625         }
 626
 627         if (incomplete)
 628                 return irtype;
 629
 630         compound->irtype_complete = true;
 631
 632         entity_t *entry = compound->members.entities;
 633         for ( ; entry != NULL; entry = entry->base.next) {
 634                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 635                         continue;
 636
 637                 size_t prev_offset = offset;
 638
 639                 symbol_t *symbol     = entry->base.symbol;
 640                 type_t   *entry_type = skip_typeref(entry->declaration.type);
 641                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 642
 643                 ident    *ident;
 644                 if (symbol != NULL) {
 645                         ident = new_id_from_str(symbol->string);
 646                 } else {
 647                         if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
 648                                 create_compound_type(&entry_type->compound, irtype, &offset,
 649                                                      &align_all, false, COMPOUND_IS_STRUCT);
 650                                 goto finished_member;
 651                         } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
 652                                 create_compound_type(&entry_type->compound, irtype, &offset,
 653                                                      &align_all, false, COMPOUND_IS_UNION);
 654                                 goto finished_member;
 655                         } else {
 656                                 assert(entry_type->kind == TYPE_BITFIELD);
 657                         }
 658                         ident = id_unique("anon.%u");
 659                 }
 660
 661                 ir_type *base_irtype;
 662                 if (entry_type->kind == TYPE_BITFIELD) {
 663                         base_irtype = get_ir_type(entry_type->bitfield.base_type);
 664                 } else {
 665                         base_irtype = get_ir_type(entry_type);
 666                 }
 667
 668                 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
 669                 size_t misalign        = offset % entry_alignment;
 670
 671                 ir_type   *entry_irtype = get_ir_type(entry_type);
 672                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 673
 674                 size_t base;
 675                 size_t bits_remainder;
 676                 if (entry_type->kind == TYPE_BITFIELD) {
 677                         size_t size_bits      = entry_type->bitfield.bit_size;
 678                         size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
 679
 680                         if (size_bits > rest_size_bits) {
 681                                 /* start a new bucket */
 682                                 offset     += entry_alignment - misalign;
 683                                 bit_offset  = 0;
 684
 685                                 base           = offset;
 686                                 bits_remainder = 0;
 687                         } else {
 688                                 /* put into current bucket */
 689                                 base           = offset - misalign;
 690                                 bits_remainder = misalign * 8 + bit_offset;
 691                         }
 692
 693                         offset     += size_bits / 8;
 694                         bit_offset  = bit_offset + (size_bits % 8);
 695                 } else {
 696                         size_t entry_size = get_type_size_bytes(base_irtype);
 697                         if (misalign > 0 || bit_offset > 0)
 698                                 offset += entry_alignment - misalign;
 699
 700                         base           = offset;
 701                         bits_remainder = 0;
 702                         offset        += entry_size;
 703                         bit_offset     = 0;
 704                 }
 705
 706                 if (entry_alignment > align_all) {
 707                         if (entry_alignment % align_all != 0) {
 708                                 panic("uneven alignments not supported yet");
 709                         }
 710                         align_all = entry_alignment;
 711                 }
 712
 713                 set_entity_offset(entity, base);
 714                 set_entity_offset_bits_remainder(entity,
 715                                                  (unsigned char) bits_remainder);
 716                 //add_struct_member(irtype, entity);
 717                 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
 718                 assert(entry->compound_member.entity == NULL);
 719                 entry->compound_member.entity = entity;
 720
 721 finished_member:
 722                 if (is_union) {
 723                         size_t entry_size = offset - prev_offset;
 724                         if (entry_size > size) {
 725                                 size = entry_size;
 726                         }
 727                         offset     = 0;
 728                         bit_offset = 0;
 729                 }
 730         }
 731
 732         if (!is_union) {
 733                 size = offset;
 734         }
 735
 736         size_t misalign = offset % align_all;
 737         if (misalign > 0 || bit_offset > 0) {
 738                 size += align_all - misalign;
 739         }
 740
 741         if (outer_offset != NULL) {
 742                 if (!is_union) {
 743                         *outer_offset = offset;
 744                 } else {
 745                         *outer_offset += size;
 746                 }
 747
 748                 if (align_all > *outer_align) {
 749                         if (align_all % *outer_align != 0) {
 750                                 panic("uneven alignments not supported yet");
 751                         }
 752                         *outer_align = align_all;
 753                 }
 754         } else {
 755                 set_type_alignment_bytes(irtype, align_all);
 756                 set_type_size_bytes(irtype, size);
 757                 set_type_state(irtype, layout_fixed);
 758         }
 759
 760         return irtype;
 761 }
 762
 763 static ir_type *create_enum_type(enum_type_t *const type)
 764 {
 765         type->base.firm_type = ir_type_int;
 766
 767         ir_mode *const mode    = mode_int;
 768         tarval  *const one     = get_mode_one(mode);
 769         tarval  *      tv_next = get_tarval_null(mode);
 770
 771         bool constant_folding_old = constant_folding;
 772         constant_folding = true;
 773
 774         enum_t   *enume = type->enume;
 775         entity_t *entry = enume->base.next;
 776         for (; entry != NULL; entry = entry->base.next) {
 777                 if (entry->kind != ENTITY_ENUM_VALUE)
 778                         break;
 779
 780                 expression_t *const init = entry->enum_value.value;
 781                 if (init != NULL) {
 782                         ir_node *const cnst = expression_to_firm(init);
 783                         if (!is_Const(cnst)) {
 784                                 panic("couldn't fold constant");
 785                         }
 786                         tv_next = get_Const_tarval(cnst);
 787                 }
 788                 entry->enum_value.tv = tv_next;
 789                 tv_next = tarval_add(tv_next, one);
 790         }
 791
 792         constant_folding = constant_folding_old;
 793
 794         return ir_type_int;
 795 }
 796
 797 static ir_type *get_ir_type_incomplete(type_t *type)
 798 {
 799         assert(type != NULL);
 800         type = skip_typeref(type);
 801
 802         if (type->base.firm_type != NULL) {
 803                 assert(type->base.firm_type != INVALID_TYPE);
 804                 return type->base.firm_type;
 805         }
 806
 807         switch (type->kind) {
 808         case TYPE_COMPOUND_STRUCT:
 809                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 810                                             true, COMPOUND_IS_STRUCT);
 811         case TYPE_COMPOUND_UNION:
 812                 return create_compound_type(&type->compound, NULL, NULL, NULL,
 813                                             true, COMPOUND_IS_UNION);
 814         default:
 815                 return get_ir_type(type);
 816         }
 817 }
 818
 819 ir_type *get_ir_type(type_t *type)
 820 {
 821         assert(type != NULL);
 822
 823         type = skip_typeref(type);
 824
 825         if (type->base.firm_type != NULL) {
 826                 assert(type->base.firm_type != INVALID_TYPE);
 827                 return type->base.firm_type;
 828         }
 829
 830         ir_type *firm_type = NULL;
 831         switch (type->kind) {
 832         case TYPE_ERROR:
 833                 /* Happens while constant folding, when there was an error */
 834                 return create_atomic_type(&type_void->atomic);
 835
 836         case TYPE_ATOMIC:
 837                 firm_type = create_atomic_type(&type->atomic);
 838                 break;
 839         case TYPE_COMPLEX:
 840                 firm_type = create_complex_type(&type->complex);
 841                 break;
 842         case TYPE_IMAGINARY:
 843                 firm_type = create_imaginary_type(&type->imaginary);
 844                 break;
 845         case TYPE_FUNCTION:
 846                 firm_type = create_method_type(&type->function);
 847                 break;
 848         case TYPE_POINTER:
 849                 firm_type = create_pointer_type(&type->pointer);
 850                 break;
 851         case TYPE_REFERENCE:
 852                 firm_type = create_reference_type(&type->reference);
 853                 break;
 854         case TYPE_ARRAY:
 855                 firm_type = create_array_type(&type->array);
 856                 break;
 857         case TYPE_COMPOUND_STRUCT:
 858                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 859                                                  false, COMPOUND_IS_STRUCT);
 860                 break;
 861         case TYPE_COMPOUND_UNION:
 862                 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
 863                                                  false, COMPOUND_IS_UNION);
 864                 break;
 865         case TYPE_ENUM:
 866                 firm_type = create_enum_type(&type->enumt);
 867                 break;
 868         case TYPE_BUILTIN:
 869                 firm_type = get_ir_type(type->builtin.real_type);
 870                 break;
 871         case TYPE_BITFIELD:
 872                 firm_type = create_bitfield_type(&type->bitfield);
 873                 break;
 874
 875         case TYPE_TYPEOF:
 876         case TYPE_TYPEDEF:
 877         case TYPE_INVALID:
 878                 break;
 879         }
 880         if (firm_type == NULL)
 881                 panic("unknown type found");
 882
 883         type->base.firm_type = firm_type;
 884         return firm_type;
 885 }
 886
 887 ir_mode *get_ir_mode(type_t *type)
 888 {
 889         ir_type *irtype = get_ir_type(type);
 890
 891         /* firm doesn't report a mode for arrays somehow... */
 892         if (is_Array_type(irtype)) {
 893                 return mode_P_data;
 894         }
 895
 896         ir_mode *mode = get_type_mode(irtype);
 897         assert(mode != NULL);
 898         return mode;
 899 }
 900
 901 /** Names of the runtime functions. */
 902 static const struct {
 903         int        id;           /**< the rts id */
 904         int        n_res;        /**< number of return values */
 905         const char *name;        /**< the name of the rts function */
 906         int        n_params;     /**< number of parameters */
 907         unsigned   flags;        /**< language flags */
 908 } rts_data[] = {
 909         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 910         { rts_abort,      0, "abort",        0, _C89 },
 911         { rts_alloca,     1, "alloca",       1, _ALL },
 912         { rts_abs,        1, "abs",          1, _C89 },
 913         { rts_labs,       1, "labs",         1, _C89 },
 914         { rts_llabs,      1, "llabs",        1, _C99 },
 915         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 916
 917         { rts_fabs,       1, "fabs",         1, _C89 },
 918         { rts_sqrt,       1, "sqrt",         1, _C89 },
 919         { rts_cbrt,       1, "cbrt",         1, _C99 },
 920         { rts_exp,        1, "exp",          1, _C89 },
 921         { rts_exp2,       1, "exp2",         1, _C89 },
 922         { rts_exp10,      1, "exp10",        1, _GNUC },
 923         { rts_log,        1, "log",          1, _C89 },
 924         { rts_log2,       1, "log2",         1, _C89 },
 925         { rts_log10,      1, "log10",        1, _C89 },
 926         { rts_pow,        1, "pow",          2, _C89 },
 927         { rts_sin,        1, "sin",          1, _C89 },
 928         { rts_cos,        1, "cos",          1, _C89 },
 929         { rts_tan,        1, "tan",          1, _C89 },
 930         { rts_asin,       1, "asin",         1, _C89 },
 931         { rts_acos,       1, "acos",         1, _C89 },
 932         { rts_atan,       1, "atan",         1, _C89 },
 933         { rts_sinh,       1, "sinh",         1, _C89 },
 934         { rts_cosh,       1, "cosh",         1, _C89 },
 935         { rts_tanh,       1, "tanh",         1, _C89 },
 936
 937         { rts_fabsf,      1, "fabsf",        1, _C99 },
 938         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 939         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 940         { rts_expf,       1, "expf",         1, _C99 },
 941         { rts_exp2f,      1, "exp2f",        1, _C99 },
 942         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 943         { rts_logf,       1, "logf",         1, _C99 },
 944         { rts_log2f,      1, "log2f",        1, _C99 },
 945         { rts_log10f,     1, "log10f",       1, _C99 },
 946         { rts_powf,       1, "powf",         2, _C99 },
 947         { rts_sinf,       1, "sinf",         1, _C99 },
 948         { rts_cosf,       1, "cosf",         1, _C99 },
 949         { rts_tanf,       1, "tanf",         1, _C99 },
 950         { rts_asinf,      1, "asinf",        1, _C99 },
 951         { rts_acosf,      1, "acosf",        1, _C99 },
 952         { rts_atanf,      1, "atanf",        1, _C99 },
 953         { rts_sinhf,      1, "sinhf",        1, _C99 },
 954         { rts_coshf,      1, "coshf",        1, _C99 },
 955         { rts_tanhf,      1, "tanhf",        1, _C99 },
 956
 957         { rts_fabsl,      1, "fabsl",        1, _C99 },
 958         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 959         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 960         { rts_expl,       1, "expl",         1, _C99 },
 961         { rts_exp2l,      1, "exp2l",        1, _C99 },
 962         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 963         { rts_logl,       1, "logl",         1, _C99 },
 964         { rts_log2l,      1, "log2l",        1, _C99 },
 965         { rts_log10l,     1, "log10l",       1, _C99 },
 966         { rts_powl,       1, "powl",         2, _C99 },
 967         { rts_sinl,       1, "sinl",         1, _C99 },
 968         { rts_cosl,       1, "cosl",         1, _C99 },
 969         { rts_tanl,       1, "tanl",         1, _C99 },
 970         { rts_asinl,      1, "asinl",        1, _C99 },
 971         { rts_acosl,      1, "acosl",        1, _C99 },
 972         { rts_atanl,      1, "atanl",        1, _C99 },
 973         { rts_sinhl,      1, "sinhl",        1, _C99 },
 974         { rts_coshl,      1, "coshl",        1, _C99 },
 975         { rts_tanhl,      1, "tanhl",        1, _C99 },
 976
 977         { rts_memcpy,     1, "memcpy",       3, _C89 },  /* HMM, man say its C99 */
 978         { rts_memset,     1, "memset",       3, _C89 },  /* HMM, man say its C99 */
 979         { rts_strcmp,     1, "strcmp",       2, _C89 },
 980         { rts_strncmp,    1, "strncmp",      3, _C89 }
 981 };
 982
 983 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
 984
 985 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
 986
 987 /**
 988  * Handle GNU attributes for entities
 989  *
 990  * @param ent   the entity
 991  * @param decl  the routine declaration
 992  */
 993 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
 994 {
 995         assert(is_declaration(entity));
 996         decl_modifiers_t modifiers = entity->declaration.modifiers;
 997         if (modifiers & DM_PURE) {
 998                 /* TRUE if the declaration includes the GNU
 999                    __attribute__((pure)) specifier. */
1000                 set_entity_additional_property(irentity, mtp_property_pure);
1001         }
1002         if (modifiers & DM_CONST) {
1003                 set_entity_additional_property(irentity, mtp_property_const);
1004                 have_const_functions = true;
1005         }
1006         if (modifiers & DM_USED) {
1007                 /* TRUE if the declaration includes the GNU
1008                    __attribute__((used)) specifier. */
1009                 set_entity_stickyness(irentity, stickyness_sticky);
1010         }
1011 }
1012
1013 static bool is_main(entity_t *entity)
1014 {
1015         static symbol_t *sym_main = NULL;
1016         if (sym_main == NULL) {
1017                 sym_main = symbol_table_insert("main");
1018         }
1019
1020         if (entity->base.symbol != sym_main)
1021                 return false;
1022         /* must be in outermost scope */
1023         if (entity->base.parent_scope != &current_translation_unit->scope)
1024                 return false;
1025
1026         return true;
1027 }
1028
1029 /**
1030  * Creates an entity representing a function.
1031  *
1032  * @param declaration  the function declaration
1033  */
1034 static ir_entity *get_function_entity(entity_t *entity)
1035 {
1036         assert(entity->kind == ENTITY_FUNCTION);
1037         if (entity->function.entity != NULL) {
1038                 return entity->function.entity;
1039         }
1040
1041         if (is_main(entity)) {
1042                 /* force main to C linkage */
1043                 type_t *type = entity->declaration.type;
1044                 assert(is_type_function(type));
1045                 if (type->function.linkage != LINKAGE_C) {
1046                         type_t *new_type           = duplicate_type(type);
1047                         new_type->function.linkage = LINKAGE_C;
1048
1049                         type = typehash_insert(new_type);
1050                         if (type != new_type) {
1051                                 obstack_free(type_obst, new_type);
1052                         }
1053                         entity->declaration.type = type;
1054                 }
1055         }
1056
1057         symbol_t *symbol = entity->base.symbol;
1058         ident    *id     = new_id_from_str(symbol->string);
1059
1060         ir_type   *global_type    = get_glob_type();
1061         ir_type   *ir_type_method = get_ir_type(entity->declaration.type);
1062         bool const has_body       = entity->function.statement != NULL;
1063
1064         /* already an entity defined? */
1065         ir_entity *irentity = entitymap_get(&entitymap, symbol);
1066         if (irentity != NULL) {
1067                 if (get_entity_visibility(irentity) == visibility_external_allocated
1068                                 && has_body) {
1069                         set_entity_visibility(irentity, visibility_external_visible);
1070                 }
1071                 goto entity_created;
1072         }
1073
1074         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1075         irentity             = new_d_entity(global_type, id, ir_type_method, dbgi);
1076         set_entity_ld_ident(irentity, create_ld_ident(entity));
1077
1078         handle_gnu_attributes_ent(irentity, entity);
1079
1080         /* static inline             => local
1081          * extern inline             => local
1082          * inline without definition => local
1083          * inline with definition    => external_visible */
1084         storage_class_tag_t const storage_class
1085                 = (storage_class_tag_t) entity->declaration.storage_class;
1086         bool                const is_inline     = entity->function.is_inline;
1087         if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1088                 set_entity_visibility(irentity, visibility_external_visible);
1089         } else if (storage_class == STORAGE_CLASS_STATIC ||
1090                    (is_inline && has_body)) {
1091                 if (!has_body) {
1092                         /* this entity was declared, but is defined nowhere */
1093                         set_entity_peculiarity(irentity, peculiarity_description);
1094                 }
1095                 set_entity_visibility(irentity, visibility_local);
1096         } else if (has_body) {
1097                 set_entity_visibility(irentity, visibility_external_visible);
1098         } else {
1099                 set_entity_visibility(irentity, visibility_external_allocated);
1100         }
1101         set_entity_allocation(irentity, allocation_static);
1102
1103         /* We should check for file scope here, but as long as we compile C only
1104            this is not needed. */
1105         if (! firm_opt.freestanding) {
1106                 /* check for a known runtime function */
1107                 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1108                         if (id != rts_idents[i])
1109                                 continue;
1110
1111                         /* ignore those rts functions not necessary needed for current mode */
1112                         if ((c_mode & rts_data[i].flags) == 0)
1113                                 continue;
1114                         assert(rts_entities[rts_data[i].id] == NULL);
1115                         rts_entities[rts_data[i].id] = irentity;
1116                 }
1117         }
1118
1119         entitymap_insert(&entitymap, symbol, irentity);
1120
1121 entity_created:
1122         entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1123         entity->function.entity  = irentity;
1124
1125         return irentity;
1126 }
1127
1128 /**
1129  * Creates a Const node representing a constant.
1130  */
1131 static ir_node *const_to_firm(const const_expression_t *cnst)
1132 {
1133         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1134         ir_mode  *mode = get_ir_mode(cnst->base.type);
1135
1136         char    buf[128];
1137         tarval *tv;
1138         size_t  len;
1139         if (mode_is_float(mode)) {
1140                 tv = new_tarval_from_double(cnst->v.float_value, mode);
1141         } else {
1142                 if (mode_is_signed(mode)) {
1143                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1144                 } else {
1145                         len = snprintf(buf, sizeof(buf), "%llu",
1146                                        (unsigned long long) cnst->v.int_value);
1147                 }
1148                 tv = new_tarval_from_str(buf, len, mode);
1149         }
1150
1151         return new_d_Const(dbgi, mode, tv);
1152 }
1153
1154 /**
1155  * Creates a Const node representing a character constant.
1156  */
1157 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1158 {
1159         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1160         ir_mode  *mode = get_ir_mode(cnst->base.type);
1161
1162         long long int v = 0;
1163         for (size_t i = 0; i < cnst->v.character.size; ++i) {
1164                 if (char_is_signed) {
1165                         v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1166                 } else {
1167                         v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1168                 }
1169         }
1170         char    buf[128];
1171         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1172         tarval *tv = new_tarval_from_str(buf, len, mode);
1173
1174         return new_d_Const(dbgi, mode, tv);
1175 }
1176
1177 /**
1178  * Creates a Const node representing a wide character constant.
1179  */
1180 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1181 {
1182         dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1183         ir_mode  *mode = get_ir_mode(cnst->base.type);
1184
1185         long long int v = cnst->v.wide_character.begin[0];
1186
1187         char    buf[128];
1188         size_t  len = snprintf(buf, sizeof(buf), "%lld", v);
1189         tarval *tv = new_tarval_from_str(buf, len, mode);
1190
1191         return new_d_Const(dbgi, mode, tv);
1192 }
1193
1194 /**
1195  * Creates a SymConst for a given entity.
1196  *
1197  * @param dbgi    debug info
1198  * @param mode    the (reference) mode for the SymConst
1199  * @param entity  the entity
1200  */
1201 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1202                               ir_entity *entity)
1203 {
1204         assert(entity != NULL);
1205         union symconst_symbol sym;
1206         sym.entity_p = entity;
1207         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1208 }
1209
1210 /**
1211  * Creates a SymConst node representing a string constant.
1212  *
1213  * @param src_pos    the source position of the string constant
1214  * @param id_prefix  a prefix for the name of the generated string constant
1215  * @param value      the value of the string constant
1216  */
1217 static ir_node *string_to_firm(const source_position_t *const src_pos,
1218                                const char *const id_prefix,
1219                                const string_t *const value)
1220 {
1221         ir_type  *const global_type = get_glob_type();
1222         dbg_info *const dbgi        = get_dbg_info(src_pos);
1223         ir_type  *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1224                                                        ir_type_const_char, dbgi);
1225
1226         ident     *const id     = id_unique(id_prefix);
1227         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1228         set_entity_ld_ident(entity, id);
1229         set_entity_variability(entity, variability_constant);
1230         set_entity_allocation(entity, allocation_static);
1231
1232         ir_type *const elem_type = ir_type_const_char;
1233         ir_mode *const mode      = get_type_mode(elem_type);
1234
1235         const char* const string = value->begin;
1236         const size_t      slen   = value->size;
1237
1238         set_array_lower_bound_int(type, 0, 0);
1239         set_array_upper_bound_int(type, 0, slen);
1240         set_type_size_bytes(type, slen);
1241         set_type_state(type, layout_fixed);
1242
1243         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1244         for (size_t i = 0; i < slen; ++i) {
1245                 tvs[i] = new_tarval_from_long(string[i], mode);
1246         }
1247
1248         set_array_entity_values(entity, tvs, slen);
1249         free(tvs);
1250
1251         return create_symconst(dbgi, mode_P_data, entity);
1252 }
1253
1254 /**
1255  * Creates a SymConst node representing a string literal.
1256  *
1257  * @param literal   the string literal
1258  */
1259 static ir_node *string_literal_to_firm(
1260                 const string_literal_expression_t* literal)
1261 {
1262         return string_to_firm(&literal->base.source_position, "Lstr.%u",
1263                               &literal->value);
1264 }
1265
1266 /**
1267  * Creates a SymConst node representing a wide string literal.
1268  *
1269  * @param literal   the wide string literal
1270  */
1271 static ir_node *wide_string_literal_to_firm(
1272         const wide_string_literal_expression_t* const literal)
1273 {
1274         ir_type *const global_type = get_glob_type();
1275         ir_type *const elem_type   = ir_type_wchar_t;
1276         dbg_info *const dbgi       = get_dbg_info(&literal->base.source_position);
1277         ir_type *const type        = new_d_type_array(id_unique("strtype.%u"), 1,
1278                                                     elem_type, dbgi);
1279
1280         ident     *const id     = id_unique("Lstr.%u");
1281         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1282         set_entity_ld_ident(entity, id);
1283         set_entity_variability(entity, variability_constant);
1284         set_entity_allocation(entity, allocation_static);
1285
1286         ir_mode *const mode      = get_type_mode(elem_type);
1287
1288         const wchar_rep_t *const string = literal->value.begin;
1289         const size_t             slen   = literal->value.size;
1290
1291         set_array_lower_bound_int(type, 0, 0);
1292         set_array_upper_bound_int(type, 0, slen);
1293         set_type_size_bytes(type, slen);
1294         set_type_state(type, layout_fixed);
1295
1296         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1297         for (size_t i = 0; i < slen; ++i) {
1298                 tvs[i] = new_tarval_from_long(string[i], mode);
1299         }
1300
1301         set_array_entity_values(entity, tvs, slen);
1302         free(tvs);
1303
1304         return create_symconst(dbgi, mode_P_data, entity);
1305 }
1306
1307 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1308                                       ir_node *const addr)
1309 {
1310         ir_type *irtype = get_ir_type(type);
1311         if (is_compound_type(irtype)
1312                         || is_Method_type(irtype)
1313                         || is_Array_type(irtype)) {
1314                 return addr;
1315         }
1316
1317         ir_mode *const mode     = get_type_mode(irtype);
1318         ir_node *const memory   = get_store();
1319         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
1320         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1321         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1322
1323         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1324                 set_Load_volatility(load, volatility_is_volatile);
1325         }
1326
1327         set_store(load_mem);
1328         return load_res;
1329 }
1330
1331 /**
1332  * Creates a strict Conv if neccessary.
1333  */
1334 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1335 {
1336         ir_mode *mode = get_irn_mode(node);
1337
1338         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1339                 return node;
1340         if (!mode_is_float(mode))
1341                 return node;
1342
1343         /* check if there is already a Conv */
1344         if (is_Conv(node)) {
1345                 /* convert it into a strict Conv */
1346                 set_Conv_strict(node, 1);
1347                 return node;
1348         }
1349
1350         /* otherwise create a new one */
1351         return new_d_strictConv(dbgi, node, mode);
1352 }
1353
1354 static ir_node *get_global_var_address(dbg_info *const dbgi,
1355                                        const entity_t *const entity)
1356 {
1357         assert(entity->kind == ENTITY_VARIABLE);
1358         assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1359
1360         ir_entity *const irentity = entity->variable.v.entity;
1361         if (entity->variable.thread_local) {
1362                 ir_node *const no_mem = new_NoMem();
1363                 ir_node *const tls    = get_irg_tls(current_ir_graph);
1364                 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1365         } else {
1366                 return create_symconst(dbgi, mode_P_data, irentity);
1367         }
1368 }
1369
1370 /**
1371  * Returns the correct base address depending on whether it is a parameter or a
1372  * normal local variable.
1373  */
1374 static ir_node *get_local_frame(ir_entity *const ent)
1375 {
1376         ir_graph      *const irg   = current_ir_graph;
1377         const ir_type *const owner = get_entity_owner(ent);
1378         if (owner == get_irg_frame_type(irg)) {
1379                 return get_irg_frame(irg);
1380         } else {
1381                 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1382                 return get_irg_value_param_base(irg);
1383         }
1384 }
1385
1386 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1387 {
1388         ir_mode *value_mode = get_irn_mode(value);
1389
1390         if (value_mode == dest_mode || is_Bad(value))
1391                 return value;
1392
1393         if (dest_mode == mode_b) {
1394                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1395                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1396                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1397                 return proj;
1398         }
1399
1400         return new_d_Conv(dbgi, value, dest_mode);
1401 }
1402
1403 /**
1404  * Keep all memory edges of the given block.
1405  */
1406 static void keep_all_memory(ir_node *block) {
1407         ir_node *old = get_cur_block();
1408
1409         set_cur_block(block);
1410         keep_alive(get_store());
1411         /* TODO: keep all memory edges from restricted pointers */
1412         set_cur_block(old);
1413 }
1414
1415 static ir_node *reference_expression_enum_value_to_firm(
1416                 const reference_expression_t *ref)
1417 {
1418         entity_t *entity = ref->entity;
1419         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1420         /* make sure the type is constructed */
1421         (void) get_ir_type(type);
1422
1423         ir_mode *const mode = get_ir_mode(type);
1424         return new_Const(mode, entity->enum_value.tv);
1425 }
1426
1427 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1428 {
1429         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1430         entity_t *entity = ref->entity;
1431         assert(is_declaration(entity));
1432         type_t   *type   = skip_typeref(entity->declaration.type);
1433
1434         /* make sure the type is constructed */
1435         (void) get_ir_type(type);
1436
1437         switch ((declaration_kind_t) entity->declaration.kind) {
1438         case DECLARATION_KIND_UNKNOWN:
1439                 break;
1440
1441         case DECLARATION_KIND_LOCAL_VARIABLE: {
1442                 ir_mode *const mode = get_ir_mode(type);
1443                 return get_value(entity->variable.v.value_number, mode);
1444         }
1445         case DECLARATION_KIND_PARAMETER: {
1446                 ir_mode *const mode = get_ir_mode(type);
1447                 return get_value(entity->parameter.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         case DECLARATION_KIND_PARAMETER_ENTITY: {
1476                 ir_entity *irentity = entity->parameter.v.entity;
1477                 ir_node   *frame    = get_local_frame(irentity);
1478                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1479                 return deref_address(dbgi, entity->declaration.type, sel);
1480         }
1481
1482         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1483                 return entity->variable.v.vla_base;
1484
1485         case DECLARATION_KIND_COMPOUND_MEMBER:
1486                 panic("not implemented reference type");
1487         }
1488
1489         panic("reference to declaration with unknown type found");
1490 }
1491
1492 static ir_node *reference_addr(const reference_expression_t *ref)
1493 {
1494         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1495         entity_t *entity = ref->entity;
1496         assert(is_declaration(entity));
1497
1498         switch((declaration_kind_t) entity->declaration.kind) {
1499         case DECLARATION_KIND_UNKNOWN:
1500                 break;
1501         case DECLARATION_KIND_PARAMETER:
1502         case DECLARATION_KIND_LOCAL_VARIABLE:
1503                 /* you can store to a local variable (so we don't panic but return NULL
1504                  * as an indicator for no real address) */
1505                 return NULL;
1506         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1507                 ir_node *const addr = get_global_var_address(dbgi, entity);
1508                 return addr;
1509         }
1510         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1511                 ir_entity *irentity = entity->variable.v.entity;
1512                 ir_node   *frame    = get_local_frame(irentity);
1513                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1514
1515                 return sel;
1516         }
1517         case DECLARATION_KIND_PARAMETER_ENTITY: {
1518                 ir_entity *irentity = entity->parameter.v.entity;
1519                 ir_node   *frame    = get_local_frame(irentity);
1520                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1521
1522                 return sel;
1523         }
1524
1525         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1526                 return entity->variable.v.vla_base;
1527
1528         case DECLARATION_KIND_FUNCTION: {
1529                 type_t  *const type = skip_typeref(entity->declaration.type);
1530                 ir_mode *const mode = get_ir_mode(type);
1531                 return create_symconst(dbgi, mode, entity->function.entity);
1532         }
1533
1534         case DECLARATION_KIND_INNER_FUNCTION:
1535         case DECLARATION_KIND_COMPOUND_MEMBER:
1536                 panic("not implemented reference type");
1537         }
1538
1539         panic("reference to declaration with unknown type found");
1540 }
1541
1542 /**
1543  * Transform calls to builtin functions.
1544  */
1545 static ir_node *process_builtin_call(const call_expression_t *call)
1546 {
1547         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1548
1549         assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1550         builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1551
1552         type_t *type = skip_typeref(builtin->base.type);
1553         assert(is_type_pointer(type));
1554
1555         type_t   *function_type = skip_typeref(type->pointer.points_to);
1556         symbol_t *symbol        = builtin->symbol;
1557
1558         switch(symbol->ID) {
1559         case T___builtin_alloca: {
1560                 if (call->arguments == NULL || call->arguments->next != NULL) {
1561                         panic("invalid number of parameters on __builtin_alloca");
1562                 }
1563                 expression_t *argument = call->arguments->expression;
1564                 ir_node      *size     = expression_to_firm(argument);
1565
1566                 ir_node *store  = get_store();
1567                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1568                                               stack_alloc);
1569                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1570                 set_store(proj_m);
1571                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1572
1573                 return res;
1574         }
1575
1576         case T___builtin_huge_val:
1577         case T___builtin_inf:
1578         case T___builtin_inff:
1579         case T___builtin_infl: {
1580                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1581                 tarval  *tv   = get_mode_infinite(mode);
1582                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1583                 return   res;
1584         }
1585         case T___builtin_nan:
1586         case T___builtin_nanf:
1587         case T___builtin_nanl: {
1588                 /* Ignore string for now... */
1589                 assert(is_type_function(function_type));
1590                 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1591                 tarval  *tv   = get_mode_NAN(mode);
1592                 ir_node *res  = new_d_Const(dbgi, mode, tv);
1593                 return res;
1594         }
1595         case T___builtin_va_end:
1596                 return NULL;
1597         default:
1598                 panic("Unsupported builtin found\n");
1599         }
1600 }
1601
1602 /**
1603  * Transform a call expression.
1604  * Handles some special cases, like alloca() calls, which must be resolved
1605  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1606  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1607  * handled right...
1608  */
1609 static ir_node *call_expression_to_firm(const call_expression_t *call)
1610 {
1611         dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1612         assert(get_cur_block() != NULL);
1613
1614         expression_t *function = call->function;
1615         if (function->kind == EXPR_BUILTIN_SYMBOL) {
1616                 return process_builtin_call(call);
1617         }
1618         if (function->kind == EXPR_REFERENCE) {
1619                 const reference_expression_t *ref    = &function->reference;
1620                 entity_t                     *entity = ref->entity;
1621
1622                 if (entity->kind == ENTITY_FUNCTION
1623                                 && entity->function.entity == rts_entities[rts_alloca]) {
1624                         /* handle alloca() call */
1625                         expression_t *argument = call->arguments->expression;
1626                         ir_node      *size     = expression_to_firm(argument);
1627
1628                         size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1629
1630                         ir_node  *store  = get_store();
1631                         dbg_info *dbgi   = get_dbg_info(&call->base.source_position);
1632                         ir_node  *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1633                                                        stack_alloc);
1634                         ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1635                         set_store(proj_m);
1636                         ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1637
1638                         return res;
1639                 }
1640         }
1641         ir_node *callee = expression_to_firm(function);
1642
1643         type_t *type = skip_typeref(function->base.type);
1644         assert(is_type_pointer(type));
1645         pointer_type_t *pointer_type = &type->pointer;
1646         type_t         *points_to    = skip_typeref(pointer_type->points_to);
1647         assert(is_type_function(points_to));
1648         function_type_t *function_type = &points_to->function;
1649
1650         int      n_parameters = 0;
1651         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
1652         ir_type *new_method_type = NULL;
1653         if (function_type->variadic || function_type->unspecified_parameters) {
1654                 const call_argument_t *argument = call->arguments;
1655                 for ( ; argument != NULL; argument = argument->next) {
1656                         ++n_parameters;
1657                 }
1658
1659                 /* we need to construct a new method type matching the call
1660                  * arguments... */
1661                 int n_res       = get_method_n_ress(ir_method_type);
1662                 dbg_info *dbgi  = get_dbg_info(&call->base.source_position);
1663                 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1664                                                     n_parameters, n_res, dbgi);
1665                 set_method_calling_convention(new_method_type,
1666                                get_method_calling_convention(ir_method_type));
1667                 set_method_additional_properties(new_method_type,
1668                                get_method_additional_properties(ir_method_type));
1669                 set_method_variadicity(new_method_type,
1670                                        get_method_variadicity(ir_method_type));
1671
1672                 for (int i = 0; i < n_res; ++i) {
1673                         set_method_res_type(new_method_type, i,
1674                                             get_method_res_type(ir_method_type, i));
1675                 }
1676                 argument = call->arguments;
1677                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1678                         expression_t *expression = argument->expression;
1679                         ir_type      *irtype     = get_ir_type(expression->base.type);
1680                         set_method_param_type(new_method_type, i, irtype);
1681                 }
1682                 ir_method_type = new_method_type;
1683         } else {
1684                 n_parameters = get_method_n_params(ir_method_type);
1685         }
1686
1687         ir_node *in[n_parameters];
1688
1689         const call_argument_t *argument = call->arguments;
1690         for (int n = 0; n < n_parameters; ++n) {
1691                 expression_t *expression = argument->expression;
1692                 ir_node      *arg_node   = expression_to_firm(expression);
1693
1694                 arg_node = do_strict_conv(dbgi, arg_node);
1695
1696                 in[n] = arg_node;
1697
1698                 argument = argument->next;
1699         }
1700
1701         ir_node  *store = get_store();
1702         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
1703                                      ir_method_type);
1704         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1705         set_store(mem);
1706
1707         type_t  *return_type = skip_typeref(function_type->return_type);
1708         ir_node *result      = NULL;
1709
1710         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1711                 ir_mode *mode;
1712                 if (is_type_scalar(return_type)) {
1713                         mode = get_ir_mode(return_type);
1714                 } else {
1715                         mode = mode_P_data;
1716                 }
1717                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1718                 result           = new_d_Proj(dbgi, resproj, mode, 0);
1719         }
1720
1721         if (function->kind == EXPR_REFERENCE &&
1722             function->reference.entity->declaration.modifiers & DM_NORETURN) {
1723                 /* A dead end:  Keep the Call and the Block.  Also place all further
1724                  * nodes into a new and unreachable block. */
1725                 keep_alive(node);
1726                 keep_alive(get_cur_block());
1727                 new_Block(0, NULL);
1728         }
1729
1730         return result;
1731 }
1732
1733 static void statement_to_firm(statement_t *statement);
1734 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1735
1736 static ir_node *expression_to_addr(const expression_t *expression);
1737 static ir_node *create_condition_evaluation(const expression_t *expression,
1738                                             ir_node *true_block,
1739                                             ir_node *false_block);
1740
1741 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1742                          ir_node *value)
1743 {
1744         value = do_strict_conv(dbgi, value);
1745
1746         ir_node *memory = get_store();
1747
1748         if (is_type_scalar(type)) {
1749                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
1750                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1751                 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1752                         set_Store_volatility(store, volatility_is_volatile);
1753                 set_store(store_mem);
1754         } else {
1755                 ir_type *irtype    = get_ir_type(type);
1756                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
1757                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1758                 set_store(copyb_mem);
1759         }
1760 }
1761
1762 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1763 {
1764         tarval *all_one   = get_mode_all_one(mode);
1765         int     mode_size = get_mode_size_bits(mode);
1766
1767         assert(offset >= 0);
1768         assert(size   >= 0);
1769         assert(offset + size <= mode_size);
1770         if (size == mode_size) {
1771                 return all_one;
1772         }
1773
1774         long    shiftr    = get_mode_size_bits(mode) - size;
1775         long    shiftl    = offset;
1776         tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1777         tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1778         tarval *mask0     = tarval_shr(all_one, tv_shiftr);
1779         tarval *mask1     = tarval_shl(mask0, tv_shiftl);
1780
1781         return mask1;
1782 }
1783
1784 static void bitfield_store_to_firm(dbg_info *dbgi,
1785                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1786 {
1787         ir_type *entity_type = get_entity_type(entity);
1788         ir_type *base_type   = get_primitive_base_type(entity_type);
1789         assert(base_type != NULL);
1790         ir_mode *mode        = get_type_mode(base_type);
1791
1792         value = create_conv(dbgi, value, mode);
1793
1794         /* kill upper bits of value and shift to right position */
1795         int      bitoffset    = get_entity_offset_bits_remainder(entity);
1796         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1797
1798         tarval  *mask            = create_bitfield_mask(mode, 0, bitsize);
1799         ir_node *mask_node       = new_d_Const(dbgi, mode, mask);
1800         ir_node *value_masked    = new_d_And(dbgi, value, mask_node, mode);
1801         tarval  *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
1802         ir_node *shiftcount      = new_d_Const(dbgi, mode_uint, shiftl);
1803         ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1804
1805         /* load current value */
1806         ir_node  *mem             = get_store();
1807         ir_node  *load            = new_d_Load(dbgi, mem, addr, mode);
1808         ir_node  *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1809         ir_node  *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
1810         tarval   *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
1811         tarval   *inv_mask        = tarval_not(shift_mask);
1812         ir_node  *inv_mask_node   = new_d_Const(dbgi, mode, inv_mask);
1813         ir_node  *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1814
1815         /* construct new value and store */
1816         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1817         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val);
1818         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1819         set_store(store_mem);
1820
1821         if (set_volatile) {
1822                 set_Load_volatility(load, volatility_is_volatile);
1823                 set_Store_volatility(store, volatility_is_volatile);
1824         }
1825 }
1826
1827 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1828                 ir_node *addr)
1829 {
1830         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
1831         type_t   *type     = expression->base.type;
1832         ir_mode  *mode     = get_ir_mode(type);
1833         ir_node  *mem      = get_store();
1834         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode);
1835         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1836         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1837
1838         load_res           = create_conv(dbgi, load_res, mode_int);
1839
1840         set_store(load_mem);
1841
1842         /* kill upper bits */
1843         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1844         ir_entity *entity       = expression->compound_entry->compound_member.entity;
1845         int        bitoffset    = get_entity_offset_bits_remainder(entity);
1846         ir_type   *entity_type  = get_entity_type(entity);
1847         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
1848         long       shift_bitsl  = machine_size - bitoffset - bitsize;
1849         assert(shift_bitsl >= 0);
1850         tarval    *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
1851         ir_node   *countl       = new_d_Const(dbgi, mode_uint, tvl);
1852         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
1853
1854         long       shift_bitsr  = bitoffset + shift_bitsl;
1855         assert(shift_bitsr <= (long) machine_size);
1856         tarval    *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
1857         ir_node   *countr       = new_d_Const(dbgi, mode_uint, tvr);
1858         ir_node   *shiftr;
1859         if (mode_is_signed(mode)) {
1860                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1861         } else {
1862                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1863         }
1864
1865         return create_conv(dbgi, shiftr, mode);
1866 }
1867
1868 /* make sure the selected compound type is constructed */
1869 static void construct_select_compound(const select_expression_t *expression)
1870 {
1871         type_t *type = skip_typeref(expression->compound->base.type);
1872         if (is_type_pointer(type)) {
1873                 type = type->pointer.points_to;
1874         }
1875         (void) get_ir_type(type);
1876 }
1877
1878 static void set_value_for_expression_addr(const expression_t *expression,
1879                                           ir_node *value, ir_node *addr)
1880 {
1881         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1882         value          = do_strict_conv(dbgi, value);
1883
1884         if (expression->kind == EXPR_REFERENCE) {
1885                 const reference_expression_t *ref = &expression->reference;
1886
1887                 entity_t *entity = ref->entity;
1888                 assert(is_declaration(entity));
1889                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1890                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1891                         set_value(entity->variable.v.value_number, value);
1892                         return;
1893                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1894                         set_value(entity->parameter.v.value_number, value);
1895                         return;
1896                 }
1897         }
1898
1899         if (addr == NULL)
1900                 addr = expression_to_addr(expression);
1901         assert(addr != NULL);
1902
1903         type_t *type = skip_typeref(expression->base.type);
1904
1905         if (expression->kind == EXPR_SELECT) {
1906                 const select_expression_t *select = &expression->select;
1907
1908                 construct_select_compound(select);
1909
1910                 entity_t *entity = select->compound_entry;
1911                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1912                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1913                         ir_entity *irentity = entity->compound_member.entity;
1914                         bool       set_volatile
1915                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1916                         bitfield_store_to_firm(dbgi, irentity, addr, value, set_volatile);
1917                         return;
1918                 }
1919         }
1920
1921         assign_value(dbgi, addr, type, value);
1922 }
1923
1924 static void set_value_for_expression(const expression_t *expression,
1925                                      ir_node *value)
1926 {
1927         set_value_for_expression_addr(expression, value, NULL);
1928 }
1929
1930 static ir_node *get_value_from_lvalue(const expression_t *expression,
1931                                       ir_node *addr)
1932 {
1933         if (expression->kind == EXPR_REFERENCE) {
1934                 const reference_expression_t *ref = &expression->reference;
1935
1936                 entity_t *entity = ref->entity;
1937                 assert(entity->kind == ENTITY_VARIABLE
1938                                 || entity->kind == ENTITY_PARAMETER);
1939                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1940                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1941                         assert(addr == NULL);
1942                         ir_mode *mode = get_ir_mode(expression->base.type);
1943                         return get_value(entity->variable.v.value_number, mode);
1944                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1945                         assert(addr == NULL);
1946                         ir_mode *mode = get_ir_mode(expression->base.type);
1947                         return get_value(entity->parameter.v.value_number, mode);
1948                 }
1949         }
1950
1951         assert(addr != NULL);
1952         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1953
1954         ir_node *value;
1955         if (expression->kind == EXPR_SELECT &&
1956             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
1957             construct_select_compound(&expression->select);
1958                 value = bitfield_extract_to_firm(&expression->select, addr);
1959         } else {
1960                 value = deref_address(dbgi, expression->base.type, addr);
1961         }
1962
1963         return value;
1964 }
1965
1966
1967 static ir_node *create_incdec(const unary_expression_t *expression)
1968 {
1969         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
1970         const expression_t *value_expr = expression->value;
1971         ir_node            *addr       = expression_to_addr(value_expr);
1972         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
1973
1974         type_t  *type = skip_typeref(expression->base.type);
1975         ir_mode *mode = get_ir_mode(expression->base.type);
1976
1977         ir_node *offset;
1978         if (is_type_pointer(type)) {
1979                 pointer_type_t *pointer_type = &type->pointer;
1980                 offset                       = get_type_size(pointer_type->points_to);
1981         } else {
1982                 assert(is_type_arithmetic(type));
1983                 offset = new_Const(mode, get_mode_one(mode));
1984         }
1985
1986         ir_node *result;
1987         ir_node *store_value;
1988         switch(expression->base.kind) {
1989         case EXPR_UNARY_POSTFIX_INCREMENT:
1990                 result      = value;
1991                 store_value = new_d_Add(dbgi, value, offset, mode);
1992                 break;
1993         case EXPR_UNARY_POSTFIX_DECREMENT:
1994                 result      = value;
1995                 store_value = new_d_Sub(dbgi, value, offset, mode);
1996                 break;
1997         case EXPR_UNARY_PREFIX_INCREMENT:
1998                 result      = new_d_Add(dbgi, value, offset, mode);
1999                 store_value = result;
2000                 break;
2001         case EXPR_UNARY_PREFIX_DECREMENT:
2002                 result      = new_d_Sub(dbgi, value, offset, mode);
2003                 store_value = result;
2004                 break;
2005         default:
2006                 panic("no incdec expr in create_incdec");
2007         }
2008
2009         set_value_for_expression_addr(value_expr, store_value, addr);
2010
2011         return result;
2012 }
2013
2014 static bool is_local_variable(expression_t *expression)
2015 {
2016         if (expression->kind != EXPR_REFERENCE)
2017                 return false;
2018         reference_expression_t *ref_expr = &expression->reference;
2019         entity_t               *entity   = ref_expr->entity;
2020         if (entity->kind != ENTITY_VARIABLE)
2021                 return false;
2022         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2023         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2024 }
2025
2026 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2027 {
2028         switch(kind) {
2029         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2030         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2031         case EXPR_BINARY_NOTEQUAL:
2032                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2033         case EXPR_BINARY_ISLESS:
2034         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2035         case EXPR_BINARY_ISLESSEQUAL:
2036         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2037         case EXPR_BINARY_ISGREATER:
2038         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2039         case EXPR_BINARY_ISGREATEREQUAL:
2040         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2041         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2042
2043         default:
2044                 break;
2045         }
2046         panic("trying to get pn_Cmp from non-comparison binexpr type");
2047 }
2048
2049 /**
2050  * Handle the assume optimizer hint: check if a Confirm
2051  * node can be created.
2052  *
2053  * @param dbi    debug info
2054  * @param expr   the IL assume expression
2055  *
2056  * we support here only some simple cases:
2057  *  - var rel const
2058  *  - const rel val
2059  *  - var rel var
2060  */
2061 static ir_node *handle_assume_compare(dbg_info *dbi,
2062                                       const binary_expression_t *expression)
2063 {
2064         expression_t *op1 = expression->left;
2065         expression_t *op2 = expression->right;
2066         entity_t     *var2, *var = NULL;
2067         ir_node      *res = NULL;
2068         pn_Cmp        cmp_val;
2069
2070         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2071
2072         if (is_local_variable(op1) && is_local_variable(op2)) {
2073         var  = op1->reference.entity;
2074             var2 = op2->reference.entity;
2075
2076                 type_t  *const type = skip_typeref(var->declaration.type);
2077                 ir_mode *const mode = get_ir_mode(type);
2078
2079                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2080                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2081
2082                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2083                 set_value(var2->variable.v.value_number, res);
2084
2085                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2086                 set_value(var->variable.v.value_number, res);
2087
2088                 return res;
2089         }
2090
2091         expression_t *con;
2092         if (is_local_variable(op1) && is_constant_expression(op2)) {
2093                 var = op1->reference.entity;
2094                 con = op2;
2095         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2096                 cmp_val = get_inversed_pnc(cmp_val);
2097                 var = op2->reference.entity;
2098                 con = op1;
2099         }
2100
2101         if (var != NULL) {
2102                 type_t  *const type = skip_typeref(var->declaration.type);
2103                 ir_mode *const mode = get_ir_mode(type);
2104
2105                 res = get_value(var->variable.v.value_number, mode);
2106                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2107                 set_value(var->variable.v.value_number, res);
2108         }
2109         return res;
2110 }
2111
2112 /**
2113  * Handle the assume optimizer hint.
2114  *
2115  * @param dbi    debug info
2116  * @param expr   the IL assume expression
2117  */
2118 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2119         switch(expression->kind) {
2120         case EXPR_BINARY_EQUAL:
2121         case EXPR_BINARY_NOTEQUAL:
2122         case EXPR_BINARY_LESS:
2123         case EXPR_BINARY_LESSEQUAL:
2124         case EXPR_BINARY_GREATER:
2125         case EXPR_BINARY_GREATEREQUAL:
2126                 return handle_assume_compare(dbi, &expression->binary);
2127         default:
2128                 return NULL;
2129         }
2130 }
2131
2132 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2133 {
2134         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2135         type_t   *type = skip_typeref(expression->base.type);
2136
2137         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2138                 return expression_to_addr(expression->value);
2139
2140         const expression_t *value = expression->value;
2141
2142         switch(expression->base.kind) {
2143         case EXPR_UNARY_NEGATE: {
2144                 ir_node *value_node = expression_to_firm(value);
2145                 ir_mode *mode = get_ir_mode(type);
2146                 return new_d_Minus(dbgi, value_node, mode);
2147         }
2148         case EXPR_UNARY_PLUS:
2149                 return expression_to_firm(value);
2150         case EXPR_UNARY_BITWISE_NEGATE: {
2151                 ir_node *value_node = expression_to_firm(value);
2152                 ir_mode *mode = get_ir_mode(type);
2153                 return new_d_Not(dbgi, value_node, mode);
2154         }
2155         case EXPR_UNARY_NOT: {
2156                 ir_node *value_node = _expression_to_firm(value);
2157                 value_node          = create_conv(dbgi, value_node, mode_b);
2158                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2159                 return res;
2160         }
2161         case EXPR_UNARY_DEREFERENCE: {
2162                 ir_node *value_node = expression_to_firm(value);
2163                 type_t  *value_type = skip_typeref(value->base.type);
2164                 assert(is_type_pointer(value_type));
2165                 type_t  *points_to  = value_type->pointer.points_to;
2166                 return deref_address(dbgi, points_to, value_node);
2167         }
2168         case EXPR_UNARY_POSTFIX_INCREMENT:
2169         case EXPR_UNARY_POSTFIX_DECREMENT:
2170         case EXPR_UNARY_PREFIX_INCREMENT:
2171         case EXPR_UNARY_PREFIX_DECREMENT:
2172                 return create_incdec(expression);
2173         case EXPR_UNARY_CAST: {
2174                 ir_node *value_node = expression_to_firm(value);
2175                 if (is_type_scalar(type)) {
2176                         ir_mode *mode = get_ir_mode(type);
2177                         ir_node *node = create_conv(dbgi, value_node, mode);
2178                         node = do_strict_conv(dbgi, node);
2179                         return node;
2180                 } else {
2181                         /* make sure firm type is constructed */
2182                         (void) get_ir_type(type);
2183                         return value_node;
2184                 }
2185         }
2186         case EXPR_UNARY_CAST_IMPLICIT: {
2187                 ir_node *value_node = expression_to_firm(value);
2188                 if (is_type_scalar(type)) {
2189                         ir_mode *mode = get_ir_mode(type);
2190                         return create_conv(dbgi, value_node, mode);
2191                 } else {
2192                         return value_node;
2193                 }
2194         }
2195         case EXPR_UNARY_ASSUME:
2196                 if (firm_opt.confirm)
2197                         return handle_assume(dbgi, value);
2198                 else
2199                         return NULL;
2200
2201         default:
2202                 break;
2203         }
2204         panic("invalid UNEXPR type found");
2205 }
2206
2207 /**
2208  * produces a 0/1 depending of the value of a mode_b node
2209  */
2210 static ir_node *produce_condition_result(const expression_t *expression,
2211                                          dbg_info *dbgi)
2212 {
2213         ir_mode *mode      = get_ir_mode(expression->base.type);
2214         ir_node *cur_block = get_cur_block();
2215
2216         ir_node *one_block = new_immBlock();
2217         ir_node *one       = new_Const(mode, get_mode_one(mode));
2218         ir_node *jmp_one   = new_d_Jmp(dbgi);
2219
2220         ir_node *zero_block = new_immBlock();
2221         ir_node *zero       = new_Const(mode, get_mode_null(mode));
2222         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2223
2224         set_cur_block(cur_block);
2225         create_condition_evaluation(expression, one_block, zero_block);
2226         mature_immBlock(one_block);
2227         mature_immBlock(zero_block);
2228
2229         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2230         new_Block(2, in_cf);
2231
2232         ir_node *in[2] = { one, zero };
2233         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2234
2235         return val;
2236 }
2237
2238 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2239                 ir_node *value, type_t *type)
2240 {
2241         pointer_type_t *const pointer_type = &type->pointer;
2242         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2243         unsigned              elem_size    = get_type_size_const(points_to);
2244
2245         /* gcc extension: allow arithmetic with void * and function * */
2246         if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2247             is_type_function(points_to))  {
2248                 elem_size = 1;
2249         }
2250
2251         assert(elem_size >= 1);
2252         if (elem_size == 1)
2253                 return value;
2254
2255         value = create_conv(dbgi, value, mode_int);
2256         ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
2257         ir_node *const mul  = new_d_Mul(dbgi, value, cnst, mode_int);
2258         return mul;
2259 }
2260
2261 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2262                           ir_node *left, ir_node *right)
2263 {
2264         ir_mode  *mode;
2265         type_t   *type_left  = skip_typeref(expression->left->base.type);
2266         type_t   *type_right = skip_typeref(expression->right->base.type);
2267
2268         expression_kind_t kind = expression->base.kind;
2269
2270         switch (kind) {
2271         case EXPR_BINARY_SHIFTLEFT:
2272         case EXPR_BINARY_SHIFTRIGHT:
2273         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2274         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2275                 mode  = get_irn_mode(left);
2276                 right = create_conv(dbgi, right, mode_uint);
2277                 break;
2278
2279         case EXPR_BINARY_SUB:
2280                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2281                         const pointer_type_t *const ptr_type = &type_left->pointer;
2282
2283                         mode = get_ir_mode(expression->base.type);
2284                         ir_node *const elem_size = get_type_size(ptr_type->points_to);
2285                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2286                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2287                         ir_node *const no_mem    = new_NoMem();
2288                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2289                                                                                                    mode, op_pin_state_floats);
2290                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2291                 }
2292                 /* fallthrough */
2293         case EXPR_BINARY_SUB_ASSIGN:
2294                 if (is_type_pointer(type_left)) {
2295                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2296                         mode  = get_ir_mode(type_left);
2297                         break;
2298                 }
2299                 goto normal_node;
2300
2301         case EXPR_BINARY_ADD:
2302         case EXPR_BINARY_ADD_ASSIGN:
2303                 if (is_type_pointer(type_left)) {
2304                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2305                         mode  = get_ir_mode(type_left);
2306                         break;
2307                 } else if (is_type_pointer(type_right)) {
2308                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2309                         mode  = get_ir_mode(type_right);
2310                         break;
2311                 }
2312                 goto normal_node;
2313
2314         default:
2315 normal_node:
2316                 mode = get_irn_mode(right);
2317                 left = create_conv(dbgi, left, mode);
2318                 break;
2319         }
2320
2321         switch (kind) {
2322         case EXPR_BINARY_ADD_ASSIGN:
2323         case EXPR_BINARY_ADD:
2324                 return new_d_Add(dbgi, left, right, mode);
2325         case EXPR_BINARY_SUB_ASSIGN:
2326         case EXPR_BINARY_SUB:
2327                 return new_d_Sub(dbgi, left, right, mode);
2328         case EXPR_BINARY_MUL_ASSIGN:
2329         case EXPR_BINARY_MUL:
2330                 return new_d_Mul(dbgi, left, right, mode);
2331         case EXPR_BINARY_BITWISE_AND:
2332         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2333                 return new_d_And(dbgi, left, right, mode);
2334         case EXPR_BINARY_BITWISE_OR:
2335         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2336                 return new_d_Or(dbgi, left, right, mode);
2337         case EXPR_BINARY_BITWISE_XOR:
2338         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2339                 return new_d_Eor(dbgi, left, right, mode);
2340         case EXPR_BINARY_SHIFTLEFT:
2341         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2342                 return new_d_Shl(dbgi, left, right, mode);
2343         case EXPR_BINARY_SHIFTRIGHT:
2344         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2345                 if (mode_is_signed(mode)) {
2346                         return new_d_Shrs(dbgi, left, right, mode);
2347                 } else {
2348                         return new_d_Shr(dbgi, left, right, mode);
2349                 }
2350         case EXPR_BINARY_DIV:
2351         case EXPR_BINARY_DIV_ASSIGN: {
2352                 ir_node *pin = new_Pin(new_NoMem());
2353                 ir_node *op;
2354                 ir_node *res;
2355                 if (mode_is_float(mode)) {
2356                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2357                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2358                 } else {
2359                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2360                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2361                 }
2362                 return res;
2363         }
2364         case EXPR_BINARY_MOD:
2365         case EXPR_BINARY_MOD_ASSIGN: {
2366                 ir_node *pin = new_Pin(new_NoMem());
2367                 assert(!mode_is_float(mode));
2368                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2369                                          op_pin_state_floats);
2370                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2371                 return res;
2372         }
2373         default:
2374                 panic("unexpected expression kind");
2375         }
2376 }
2377
2378 static ir_node *create_lazy_op(const binary_expression_t *expression)
2379 {
2380         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2381         type_t   *type = expression->base.type;
2382         ir_mode  *mode = get_ir_mode(type);
2383
2384         if (is_constant_expression(expression->left)) {
2385                 long val = fold_constant(expression->left);
2386                 expression_kind_t ekind = expression->base.kind;
2387                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2388                 if ((ekind == EXPR_BINARY_LOGICAL_AND && val != 0) ||
2389                     (ekind == EXPR_BINARY_LOGICAL_OR  && val == 0)) {
2390                         return expression_to_firm(expression->right);
2391                 } else {
2392                         return new_Const(mode, get_mode_one(mode));
2393                 }
2394         }
2395
2396         return produce_condition_result((const expression_t*) expression, dbgi);
2397 }
2398
2399 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2400                                             ir_node *right, ir_mode *mode);
2401
2402 static ir_node *create_assign_binop(const binary_expression_t *expression)
2403 {
2404         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2405         const expression_t *left_expr = expression->left;
2406         ir_mode            *left_mode = get_ir_mode(left_expr->base.type);
2407         ir_node            *right     = expression_to_firm(expression->right);
2408         ir_node            *left_addr = expression_to_addr(left_expr);
2409         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2410         ir_node            *result    = create_op(dbgi, expression, left, right);
2411
2412         result = create_conv(dbgi, result, left_mode);
2413         result = do_strict_conv(dbgi, result);
2414
2415         set_value_for_expression_addr(left_expr, result, left_addr);
2416
2417         return result;
2418 }
2419
2420 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2421 {
2422         expression_kind_t kind = expression->base.kind;
2423
2424         switch(kind) {
2425         case EXPR_BINARY_EQUAL:
2426         case EXPR_BINARY_NOTEQUAL:
2427         case EXPR_BINARY_LESS:
2428         case EXPR_BINARY_LESSEQUAL:
2429         case EXPR_BINARY_GREATER:
2430         case EXPR_BINARY_GREATEREQUAL:
2431         case EXPR_BINARY_ISGREATER:
2432         case EXPR_BINARY_ISGREATEREQUAL:
2433         case EXPR_BINARY_ISLESS:
2434         case EXPR_BINARY_ISLESSEQUAL:
2435         case EXPR_BINARY_ISLESSGREATER:
2436         case EXPR_BINARY_ISUNORDERED: {
2437                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2438                 ir_node *left  = expression_to_firm(expression->left);
2439                 ir_node *right = expression_to_firm(expression->right);
2440                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2441                 long     pnc   = get_pnc(kind, expression->left->base.type);
2442                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2443                 return proj;
2444         }
2445         case EXPR_BINARY_ASSIGN: {
2446                 ir_node *addr  = expression_to_addr(expression->left);
2447                 ir_node *right = expression_to_firm(expression->right);
2448                 set_value_for_expression_addr(expression->left, right, addr);
2449
2450                 return right;
2451         }
2452         case EXPR_BINARY_ADD:
2453         case EXPR_BINARY_SUB:
2454         case EXPR_BINARY_MUL:
2455         case EXPR_BINARY_DIV:
2456         case EXPR_BINARY_MOD:
2457         case EXPR_BINARY_BITWISE_AND:
2458         case EXPR_BINARY_BITWISE_OR:
2459         case EXPR_BINARY_BITWISE_XOR:
2460         case EXPR_BINARY_SHIFTLEFT:
2461         case EXPR_BINARY_SHIFTRIGHT:
2462         {
2463                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2464                 ir_node  *left  = expression_to_firm(expression->left);
2465                 ir_node  *right = expression_to_firm(expression->right);
2466                 return create_op(dbgi, expression, left, right);
2467         }
2468         case EXPR_BINARY_LOGICAL_AND:
2469         case EXPR_BINARY_LOGICAL_OR:
2470                 return create_lazy_op(expression);
2471         case EXPR_BINARY_COMMA:
2472                 /* create side effects of left side */
2473                 (void) expression_to_firm(expression->left);
2474                 return _expression_to_firm(expression->right);
2475
2476         case EXPR_BINARY_ADD_ASSIGN:
2477         case EXPR_BINARY_SUB_ASSIGN:
2478         case EXPR_BINARY_MUL_ASSIGN:
2479         case EXPR_BINARY_MOD_ASSIGN:
2480         case EXPR_BINARY_DIV_ASSIGN:
2481         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2482         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2483         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2484         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2485         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2486                 return create_assign_binop(expression);
2487         case EXPR_BINARY_BUILTIN_EXPECT:
2488                 return _expression_to_firm(expression->left);
2489         default:
2490                 panic("TODO binexpr type");
2491         }
2492 }
2493
2494 static ir_node *array_access_addr(const array_access_expression_t *expression)
2495 {
2496         dbg_info *dbgi      = get_dbg_info(&expression->base.source_position);
2497         ir_node  *base_addr = expression_to_firm(expression->array_ref);
2498         ir_node  *offset    = expression_to_firm(expression->index);
2499
2500         type_t  *offset_type = skip_typeref(expression->index->base.type);
2501         ir_mode *mode;
2502         if (is_type_signed(offset_type)) {
2503                 mode = get_ir_mode(type_ssize_t);
2504         } else {
2505                 mode = get_ir_mode(type_size_t);
2506         }
2507         offset = create_conv(dbgi, offset, mode);
2508
2509         type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2510         assert(is_type_pointer(ref_type));
2511         pointer_type_t *pointer_type = &ref_type->pointer;
2512
2513         ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2514         elem_size_const          = create_conv(dbgi, elem_size_const, mode);
2515         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
2516                                              mode);
2517         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2518
2519         return result;
2520 }
2521
2522 static ir_node *array_access_to_firm(
2523                 const array_access_expression_t *expression)
2524 {
2525         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2526         ir_node  *addr   = array_access_addr(expression);
2527         type_t   *type   = revert_automatic_type_conversion(
2528                         (const expression_t*) expression);
2529         type             = skip_typeref(type);
2530
2531         return deref_address(dbgi, type, addr);
2532 }
2533
2534 static long get_offsetof_offset(const offsetof_expression_t *expression)
2535 {
2536         type_t *orig_type = expression->type;
2537         long    offset    = 0;
2538
2539         designator_t *designator = expression->designator;
2540         for ( ; designator != NULL; designator = designator->next) {
2541                 type_t *type = skip_typeref(orig_type);
2542                 /* be sure the type is constructed */
2543                 (void) get_ir_type(type);
2544
2545                 if (designator->symbol != NULL) {
2546                         assert(is_type_compound(type));
2547                         symbol_t *symbol = designator->symbol;
2548
2549                         compound_t *compound = type->compound.compound;
2550                         entity_t   *iter     = compound->members.entities;
2551                         for ( ; iter != NULL; iter = iter->base.next) {
2552                                 if (iter->base.symbol == symbol) {
2553                                         break;
2554                                 }
2555                         }
2556                         assert(iter != NULL);
2557
2558                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2559                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2560                         offset += get_entity_offset(iter->compound_member.entity);
2561
2562                         orig_type = iter->declaration.type;
2563                 } else {
2564                         expression_t *array_index = designator->array_index;
2565                         assert(designator->array_index != NULL);
2566                         assert(is_type_array(type));
2567
2568                         long index         = fold_constant(array_index);
2569                         ir_type *arr_type  = get_ir_type(type);
2570                         ir_type *elem_type = get_array_element_type(arr_type);
2571                         long     elem_size = get_type_size_bytes(elem_type);
2572
2573                         offset += index * elem_size;
2574
2575                         orig_type = type->array.element_type;
2576                 }
2577         }
2578
2579         return offset;
2580 }
2581
2582 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2583 {
2584         ir_mode  *mode   = get_ir_mode(expression->base.type);
2585         long      offset = get_offsetof_offset(expression);
2586         tarval   *tv     = new_tarval_from_long(offset, mode);
2587         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2588
2589         return new_d_Const(dbgi, mode, tv);
2590 }
2591
2592 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2593                                      ir_entity *entity, type_t *type);
2594
2595 static ir_node *compound_literal_to_firm(
2596                 const compound_literal_expression_t *expression)
2597 {
2598         type_t *type = expression->type;
2599
2600         /* create an entity on the stack */
2601         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2602
2603         ident     *const id     = id_unique("CompLit.%u");
2604         ir_type   *const irtype = get_ir_type(type);
2605         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
2606         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2607         set_entity_ld_ident(entity, id);
2608
2609         set_entity_variability(entity, variability_uninitialized);
2610
2611         /* create initialisation code */
2612         initializer_t *initializer = expression->initializer;
2613         create_local_initializer(initializer, dbgi, entity, type);
2614
2615         /* create a sel for the compound literal address */
2616         ir_node *frame = get_local_frame(entity);
2617         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2618         return sel;
2619 }
2620
2621 /**
2622  * Transform a sizeof expression into Firm code.
2623  */
2624 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2625 {
2626         type_t *type = expression->type;
2627         if (type == NULL) {
2628                 type = expression->tp_expression->base.type;
2629                 assert(type != NULL);
2630         }
2631
2632         type = skip_typeref(type);
2633         /* § 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2634         if (is_type_array(type) && type->array.is_vla
2635                         && expression->tp_expression != NULL) {
2636                 expression_to_firm(expression->tp_expression);
2637         }
2638
2639         return get_type_size(type);
2640 }
2641
2642 /**
2643  * Transform an alignof expression into Firm code.
2644  */
2645 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2646 {
2647         type_t *type = expression->type;
2648         if (type == NULL) {
2649                 /* beware: if expression is a variable reference, return the
2650                    alignment of the variable. */
2651                 const expression_t *tp_expression = expression->tp_expression;
2652                 const entity_t     *entity        = expression_is_variable(tp_expression);
2653                 if (entity != NULL) {
2654                         /* TODO: get the alignment of this variable. */
2655                         (void) entity;
2656                 }
2657                 type = tp_expression->base.type;
2658                 assert(type != NULL);
2659         }
2660
2661         ir_mode *const mode = get_ir_mode(expression->base.type);
2662         symconst_symbol sym;
2663         sym.type_p = get_ir_type(type);
2664         return new_SymConst(mode, sym, symconst_type_align);
2665 }
2666
2667 static void init_ir_types(void);
2668
2669 long fold_constant(const expression_t *expression)
2670 {
2671         assert(is_type_valid(skip_typeref(expression->base.type)));
2672
2673         bool constant_folding_old = constant_folding;
2674         constant_folding = true;
2675
2676         init_ir_types();
2677
2678         assert(is_constant_expression(expression));
2679
2680         ir_graph *old_current_ir_graph = current_ir_graph;
2681         if (current_ir_graph == NULL) {
2682                 current_ir_graph = get_const_code_irg();
2683         }
2684
2685         ir_node *cnst = expression_to_firm(expression);
2686         current_ir_graph = old_current_ir_graph;
2687
2688         if (!is_Const(cnst)) {
2689                 panic("couldn't fold constant\n");
2690         }
2691
2692         tarval *tv = get_Const_tarval(cnst);
2693         if (!tarval_is_long(tv)) {
2694                 panic("result of constant folding is not integer\n");
2695         }
2696
2697         constant_folding = constant_folding_old;
2698
2699         return get_tarval_long(tv);
2700 }
2701
2702 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2703 {
2704         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2705
2706         /* first try to fold a constant condition */
2707         if (is_constant_expression(expression->condition)) {
2708                 long val = fold_constant(expression->condition);
2709                 if (val) {
2710                         expression_t *true_expression = expression->true_expression;
2711                         if (true_expression == NULL)
2712                                 true_expression = expression->condition;
2713                         return expression_to_firm(true_expression);
2714                 } else {
2715                         return expression_to_firm(expression->false_expression);
2716                 }
2717         }
2718
2719         ir_node *cur_block   = get_cur_block();
2720
2721         /* create the true block */
2722         ir_node *true_block  = new_immBlock();
2723
2724         ir_node *true_val = expression->true_expression != NULL ?
2725                 expression_to_firm(expression->true_expression) : NULL;
2726         ir_node *true_jmp = new_Jmp();
2727
2728         /* create the false block */
2729         ir_node *false_block = new_immBlock();
2730
2731         ir_node *false_val = expression_to_firm(expression->false_expression);
2732         ir_node *false_jmp = new_Jmp();
2733
2734         /* create the condition evaluation */
2735         set_cur_block(cur_block);
2736         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2737         if (expression->true_expression == NULL) {
2738                 if (cond_expr != NULL) {
2739                         true_val = cond_expr;
2740                 } else {
2741                         /* Condition ended with a short circuit (&&, ||, !) operation.
2742                          * Generate a "1" as value for the true branch. */
2743                         ir_mode *const mode = mode_Is;
2744                         true_val = new_Const(mode, get_mode_one(mode));
2745                 }
2746         }
2747         mature_immBlock(true_block);
2748         mature_immBlock(false_block);
2749
2750         /* create the common block */
2751         ir_node *in_cf[2] = { true_jmp, false_jmp };
2752         new_Block(2, in_cf);
2753
2754         /* TODO improve static semantics, so either both or no values are NULL */
2755         if (true_val == NULL || false_val == NULL)
2756                 return NULL;
2757
2758         ir_node *in[2] = { true_val, false_val };
2759         ir_mode *mode  = get_irn_mode(true_val);
2760         assert(get_irn_mode(false_val) == mode);
2761         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2762
2763         return val;
2764 }
2765
2766 /**
2767  * Returns an IR-node representing the address of a field.
2768  */
2769 static ir_node *select_addr(const select_expression_t *expression)
2770 {
2771         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2772
2773         construct_select_compound(expression);
2774
2775         ir_node *compound_addr = expression_to_firm(expression->compound);
2776
2777         entity_t *entry = expression->compound_entry;
2778         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2779         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2780         ir_entity *irentity = entry->compound_member.entity;
2781
2782         assert(irentity != NULL);
2783
2784         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2785
2786         return sel;
2787 }
2788
2789 static ir_node *select_to_firm(const select_expression_t *expression)
2790 {
2791         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2792         ir_node  *addr = select_addr(expression);
2793         type_t   *type = revert_automatic_type_conversion(
2794                         (const expression_t*) expression);
2795         type           = skip_typeref(type);
2796
2797         entity_t *entry      = expression->compound_entry;
2798         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2799         type_t   *entry_type = skip_typeref(entry->declaration.type);
2800
2801         if (entry_type->kind == TYPE_BITFIELD) {
2802                 return bitfield_extract_to_firm(expression, addr);
2803         }
2804
2805         return deref_address(dbgi, type, addr);
2806 }
2807
2808 /* Values returned by __builtin_classify_type. */
2809 typedef enum gcc_type_class
2810 {
2811         no_type_class = -1,
2812         void_type_class,
2813         integer_type_class,
2814         char_type_class,
2815         enumeral_type_class,
2816         boolean_type_class,
2817         pointer_type_class,
2818         reference_type_class,
2819         offset_type_class,
2820         real_type_class,
2821         complex_type_class,
2822         function_type_class,
2823         method_type_class,
2824         record_type_class,
2825         union_type_class,
2826         array_type_class,
2827         string_type_class,
2828         set_type_class,
2829         file_type_class,
2830         lang_type_class
2831 } gcc_type_class;
2832
2833 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2834 {
2835         type_t *type = expr->type_expression->base.type;
2836
2837         /* FIXME gcc returns different values depending on whether compiling C or C++
2838          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2839         gcc_type_class tc;
2840         for (;;) {
2841                 type = skip_typeref(type);
2842                 switch (type->kind) {
2843                         case TYPE_ATOMIC: {
2844                                 const atomic_type_t *const atomic_type = &type->atomic;
2845                                 switch (atomic_type->akind) {
2846                                         /* should not be reached */
2847                                         case ATOMIC_TYPE_INVALID:
2848                                                 tc = no_type_class;
2849                                                 goto make_const;
2850
2851                                         /* gcc cannot do that */
2852                                         case ATOMIC_TYPE_VOID:
2853                                                 tc = void_type_class;
2854                                                 goto make_const;
2855
2856                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
2857                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
2858                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
2859                                         case ATOMIC_TYPE_SHORT:
2860                                         case ATOMIC_TYPE_USHORT:
2861                                         case ATOMIC_TYPE_INT:
2862                                         case ATOMIC_TYPE_UINT:
2863                                         case ATOMIC_TYPE_LONG:
2864                                         case ATOMIC_TYPE_ULONG:
2865                                         case ATOMIC_TYPE_LONGLONG:
2866                                         case ATOMIC_TYPE_ULONGLONG:
2867                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
2868                                                 tc = integer_type_class;
2869                                                 goto make_const;
2870
2871                                         case ATOMIC_TYPE_FLOAT:
2872                                         case ATOMIC_TYPE_DOUBLE:
2873                                         case ATOMIC_TYPE_LONG_DOUBLE:
2874                                                 tc = real_type_class;
2875                                                 goto make_const;
2876                                 }
2877                                 panic("Unexpected atomic type in classify_type_to_firm().");
2878                         }
2879
2880                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
2881                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
2882                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
2883                         case TYPE_ARRAY:           /* gcc handles this as pointer */
2884                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
2885                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
2886                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
2887                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
2888
2889                         /* gcc handles this as integer */
2890                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
2891
2892                         /* gcc classifies the referenced type */
2893                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
2894
2895                         case TYPE_BUILTIN:
2896                         /* typedef/typeof should be skipped already */
2897                         case TYPE_TYPEDEF:
2898                         case TYPE_TYPEOF:
2899                         case TYPE_INVALID:
2900                         case TYPE_ERROR:
2901                                 break;
2902                 }
2903                 panic("unexpected TYPE classify_type_to_firm().");
2904         }
2905
2906 make_const:;
2907         dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2908         ir_mode  *const mode = mode_int;
2909         tarval   *const tv   = new_tarval_from_long(tc, mode);
2910         return new_d_Const(dbgi, mode, tv);
2911 }
2912
2913 static ir_node *function_name_to_firm(
2914                 const funcname_expression_t *const expr)
2915 {
2916         switch(expr->kind) {
2917         case FUNCNAME_FUNCTION:
2918         case FUNCNAME_PRETTY_FUNCTION:
2919         case FUNCNAME_FUNCDNAME:
2920                 if (current_function_name == NULL) {
2921                         const source_position_t *const src_pos = &expr->base.source_position;
2922                         const char    *name  = current_function_entity->base.symbol->string;
2923                         const string_t string = { name, strlen(name) + 1 };
2924                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2925                 }
2926                 return current_function_name;
2927         case FUNCNAME_FUNCSIG:
2928                 if (current_funcsig == NULL) {
2929                         const source_position_t *const src_pos = &expr->base.source_position;
2930                         ir_entity *ent = get_irg_entity(current_ir_graph);
2931                         const char *const name = get_entity_ld_name(ent);
2932                         const string_t string = { name, strlen(name) + 1 };
2933                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2934                 }
2935                 return current_funcsig;
2936         }
2937         panic("Unsupported function name");
2938 }
2939
2940 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2941 {
2942         statement_t *statement = expr->statement;
2943
2944         assert(statement->kind == STATEMENT_COMPOUND);
2945         return compound_statement_to_firm(&statement->compound);
2946 }
2947
2948 static ir_node *va_start_expression_to_firm(
2949         const va_start_expression_t *const expr)
2950 {
2951         type_t    *const type        = current_function_entity->declaration.type;
2952         ir_type   *const method_type = get_ir_type(type);
2953         int        const n           = get_method_n_params(method_type) - 1;
2954         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
2955         ir_node   *const arg_base    = get_irg_value_param_base(current_ir_graph);
2956         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
2957         ir_node   *const no_mem      = new_NoMem();
2958         ir_node   *const arg_sel     =
2959                 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2960
2961         ir_node   *const cnst        = get_type_size(expr->parameter->base.type);
2962         ir_node   *const add         = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2963         set_value_for_expression(expr->ap, add);
2964
2965         return NULL;
2966 }
2967
2968 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2969 {
2970         type_t       *const type    = expr->base.type;
2971         expression_t *const ap_expr = expr->ap;
2972         ir_node      *const ap_addr = expression_to_addr(ap_expr);
2973         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
2974         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
2975         ir_node      *const res     = deref_address(dbgi, type, ap);
2976
2977         ir_node      *const cnst    = get_type_size(expr->base.type);
2978         ir_node      *const add     = new_d_Add(dbgi, ap, cnst, mode_P_data);
2979
2980         set_value_for_expression_addr(ap_expr, add, ap_addr);
2981
2982         return res;
2983 }
2984
2985 static ir_node *dereference_addr(const unary_expression_t *const expression)
2986 {
2987         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2988         return expression_to_firm(expression->value);
2989 }
2990
2991 /**
2992  * Returns a IR-node representing an lvalue of the given expression.
2993  */
2994 static ir_node *expression_to_addr(const expression_t *expression)
2995 {
2996         switch(expression->kind) {
2997         case EXPR_REFERENCE:
2998                 return reference_addr(&expression->reference);
2999         case EXPR_ARRAY_ACCESS:
3000                 return array_access_addr(&expression->array_access);
3001         case EXPR_SELECT:
3002                 return select_addr(&expression->select);
3003         case EXPR_CALL:
3004                 return call_expression_to_firm(&expression->call);
3005         case EXPR_UNARY_DEREFERENCE: {
3006                 return dereference_addr(&expression->unary);
3007         }
3008         default:
3009                 break;
3010         }
3011         panic("trying to get address of non-lvalue");
3012 }
3013
3014 static ir_node *builtin_constant_to_firm(
3015                 const builtin_constant_expression_t *expression)
3016 {
3017         ir_mode *mode = get_ir_mode(expression->base.type);
3018         long     v;
3019
3020         if (is_constant_expression(expression->value)) {
3021                 v = 1;
3022         } else {
3023                 v = 0;
3024         }
3025         return new_Const_long(mode, v);
3026 }
3027
3028 static ir_node *builtin_prefetch_to_firm(
3029                 const builtin_prefetch_expression_t *expression)
3030 {
3031         ir_node *adr = expression_to_firm(expression->adr);
3032         /* no Firm support for prefetch yet */
3033         (void) adr;
3034         return NULL;
3035 }
3036
3037 static ir_node *get_label_block(label_t *label)
3038 {
3039         if (label->block != NULL)
3040                 return label->block;
3041
3042         /* beware: might be called from create initializer with current_ir_graph
3043          * set to const_code_irg. */
3044         ir_graph *rem    = current_ir_graph;
3045         current_ir_graph = current_function;
3046
3047         ir_node *old_cur_block = get_cur_block();
3048         ir_node *block         = new_immBlock();
3049         set_cur_block(old_cur_block);
3050
3051         label->block = block;
3052
3053         ARR_APP1(label_t *, all_labels, label);
3054
3055         current_ir_graph = rem;
3056         return block;
3057 }
3058
3059 /**
3060  * Pointer to a label.  This is used for the
3061  * GNU address-of-label extension.
3062  */
3063 static ir_node *label_address_to_firm(
3064                 const label_address_expression_t *label)
3065 {
3066         ir_node    *block = get_label_block(label->label);
3067         ir_label_t  nr    = get_Block_label(block);
3068
3069         if (nr == 0) {
3070                 nr = get_irp_next_label_nr();
3071                 set_Block_label(block, nr);
3072         }
3073         symconst_symbol value;
3074         value.label = nr;
3075         return new_SymConst(mode_P_code, value, symconst_label);
3076 }
3077
3078 /**
3079  * creates firm nodes for an expression. The difference between this function
3080  * and expression_to_firm is, that this version might produce mode_b nodes
3081  * instead of mode_Is.
3082  */
3083 static ir_node *_expression_to_firm(const expression_t *expression)
3084 {
3085 #ifndef NDEBUG
3086         if (!constant_folding) {
3087                 assert(!expression->base.transformed);
3088                 ((expression_t*) expression)->base.transformed = true;
3089         }
3090 #endif
3091
3092         switch (expression->kind) {
3093         case EXPR_CHARACTER_CONSTANT:
3094                 return character_constant_to_firm(&expression->conste);
3095         case EXPR_WIDE_CHARACTER_CONSTANT:
3096                 return wide_character_constant_to_firm(&expression->conste);
3097         case EXPR_CONST:
3098                 return const_to_firm(&expression->conste);
3099         case EXPR_STRING_LITERAL:
3100                 return string_literal_to_firm(&expression->string);
3101         case EXPR_WIDE_STRING_LITERAL:
3102                 return wide_string_literal_to_firm(&expression->wide_string);
3103         case EXPR_REFERENCE:
3104                 return reference_expression_to_firm(&expression->reference);
3105         case EXPR_REFERENCE_ENUM_VALUE:
3106                 return reference_expression_enum_value_to_firm(&expression->reference);
3107         case EXPR_CALL:
3108                 return call_expression_to_firm(&expression->call);
3109         EXPR_UNARY_CASES
3110                 return unary_expression_to_firm(&expression->unary);
3111         EXPR_BINARY_CASES
3112                 return binary_expression_to_firm(&expression->binary);
3113         case EXPR_ARRAY_ACCESS:
3114                 return array_access_to_firm(&expression->array_access);
3115         case EXPR_SIZEOF:
3116                 return sizeof_to_firm(&expression->typeprop);
3117         case EXPR_ALIGNOF:
3118                 return alignof_to_firm(&expression->typeprop);
3119         case EXPR_CONDITIONAL:
3120                 return conditional_to_firm(&expression->conditional);
3121         case EXPR_SELECT:
3122                 return select_to_firm(&expression->select);
3123         case EXPR_CLASSIFY_TYPE:
3124                 return classify_type_to_firm(&expression->classify_type);
3125         case EXPR_FUNCNAME:
3126                 return function_name_to_firm(&expression->funcname);
3127         case EXPR_STATEMENT:
3128                 return statement_expression_to_firm(&expression->statement);
3129         case EXPR_VA_START:
3130                 return va_start_expression_to_firm(&expression->va_starte);
3131         case EXPR_VA_ARG:
3132                 return va_arg_expression_to_firm(&expression->va_arge);
3133         case EXPR_BUILTIN_SYMBOL:
3134                 panic("unimplemented expression found");
3135         case EXPR_BUILTIN_CONSTANT_P:
3136                 return builtin_constant_to_firm(&expression->builtin_constant);
3137         case EXPR_BUILTIN_PREFETCH:
3138                 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3139         case EXPR_OFFSETOF:
3140                 return offsetof_to_firm(&expression->offsetofe);
3141         case EXPR_COMPOUND_LITERAL:
3142                 return compound_literal_to_firm(&expression->compound_literal);
3143         case EXPR_LABEL_ADDRESS:
3144                 return label_address_to_firm(&expression->label_address);
3145
3146         case EXPR_UNKNOWN:
3147         case EXPR_INVALID:
3148                 break;
3149         }
3150         panic("invalid expression found");
3151 }
3152
3153 static bool produces_mode_b(const expression_t *expression)
3154 {
3155         switch (expression->kind) {
3156         case EXPR_BINARY_EQUAL:
3157         case EXPR_BINARY_NOTEQUAL:
3158         case EXPR_BINARY_LESS:
3159         case EXPR_BINARY_LESSEQUAL:
3160         case EXPR_BINARY_GREATER:
3161         case EXPR_BINARY_GREATEREQUAL:
3162         case EXPR_BINARY_ISGREATER:
3163         case EXPR_BINARY_ISGREATEREQUAL:
3164         case EXPR_BINARY_ISLESS:
3165         case EXPR_BINARY_ISLESSEQUAL:
3166         case EXPR_BINARY_ISLESSGREATER:
3167         case EXPR_BINARY_ISUNORDERED:
3168         case EXPR_UNARY_NOT:
3169                 return true;
3170
3171         case EXPR_BINARY_BUILTIN_EXPECT:
3172                 return produces_mode_b(expression->binary.left);
3173         case EXPR_BINARY_COMMA:
3174                 return produces_mode_b(expression->binary.right);
3175
3176         default:
3177                 return false;
3178         }
3179 }
3180
3181 static ir_node *expression_to_firm(const expression_t *expression)
3182 {
3183         if (!produces_mode_b(expression)) {
3184                 ir_node *res = _expression_to_firm(expression);
3185                 assert(res == NULL || get_irn_mode(res) != mode_b);
3186                 return res;
3187         }
3188
3189         if (is_constant_expression(expression)) {
3190                 ir_node *res  = _expression_to_firm(expression);
3191                 ir_mode *mode = get_ir_mode(expression->base.type);
3192                 assert(is_Const(res));
3193                 if (is_Const_null(res)) {
3194                         return new_Const_long(mode, 0);
3195                 } else {
3196                         return new_Const_long(mode, 1);
3197                 }
3198         }
3199
3200         /* we have to produce a 0/1 from the mode_b expression */
3201         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3202         return produce_condition_result(expression, dbgi);
3203 }
3204
3205 /**
3206  * create a short-circuit expression evaluation that tries to construct
3207  * efficient control flow structures for &&, || and ! expressions
3208  */
3209 static ir_node *create_condition_evaluation(const expression_t *expression,
3210                                             ir_node *true_block,
3211                                             ir_node *false_block)
3212 {
3213         switch(expression->kind) {
3214         case EXPR_UNARY_NOT: {
3215                 const unary_expression_t *unary_expression = &expression->unary;
3216                 create_condition_evaluation(unary_expression->value, false_block,
3217                                             true_block);
3218                 return NULL;
3219         }
3220         case EXPR_BINARY_LOGICAL_AND: {
3221                 const binary_expression_t *binary_expression = &expression->binary;
3222
3223                 ir_node *cur_block   = get_cur_block();
3224                 ir_node *extra_block = new_immBlock();
3225                 set_cur_block(cur_block);
3226                 create_condition_evaluation(binary_expression->left, extra_block,
3227                                             false_block);
3228                 mature_immBlock(extra_block);
3229                 set_cur_block(extra_block);
3230                 create_condition_evaluation(binary_expression->right, true_block,
3231                                             false_block);
3232                 return NULL;
3233         }
3234         case EXPR_BINARY_LOGICAL_OR: {
3235                 const binary_expression_t *binary_expression = &expression->binary;
3236
3237                 ir_node *cur_block   = get_cur_block();
3238                 ir_node *extra_block = new_immBlock();
3239                 set_cur_block(cur_block);
3240                 create_condition_evaluation(binary_expression->left, true_block,
3241                                             extra_block);
3242                 mature_immBlock(extra_block);
3243                 set_cur_block(extra_block);
3244                 create_condition_evaluation(binary_expression->right, true_block,
3245                                             false_block);
3246                 return NULL;
3247         }
3248         default:
3249                 break;
3250         }
3251
3252         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3253         ir_node  *cond_expr  = _expression_to_firm(expression);
3254         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3255         ir_node  *cond       = new_d_Cond(dbgi, condition);
3256         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3257         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3258
3259         /* set branch prediction info based on __builtin_expect */
3260         if (expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
3261                 long               cnst = fold_constant(expression->binary.right);
3262                 cond_jmp_predicate pred;
3263
3264                 if (cnst == 0) {
3265                         pred = COND_JMP_PRED_FALSE;
3266                 } else {
3267                         pred = COND_JMP_PRED_TRUE;
3268                 }
3269                 set_Cond_jmp_pred(cond, pred);
3270         }
3271
3272         add_immBlock_pred(true_block, true_proj);
3273         if (false_block != NULL) {
3274                 add_immBlock_pred(false_block, false_proj);
3275         }
3276
3277         set_cur_block(NULL);
3278         return cond_expr;
3279 }
3280
3281
3282 static void create_variable_entity(entity_t *variable,
3283                                    declaration_kind_t declaration_kind,
3284                                    ir_type *parent_type)
3285 {
3286         assert(variable->kind == ENTITY_VARIABLE);
3287         type_t    *const type     = skip_typeref(variable->declaration.type);
3288         ident     *const id       = new_id_from_str(variable->base.symbol->string);
3289         ir_type   *const irtype   = get_ir_type(type);
3290         dbg_info  *const dbgi     = get_dbg_info(&variable->base.source_position);
3291         ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3292
3293         handle_gnu_attributes_ent(irentity, variable);
3294
3295         variable->declaration.kind  = (unsigned char) declaration_kind;
3296         variable->variable.v.entity = irentity;
3297         set_entity_variability(irentity, variability_uninitialized);
3298         set_entity_ld_ident(irentity, create_ld_ident(variable));
3299         if (parent_type == get_tls_type())
3300                 set_entity_allocation(irentity, allocation_automatic);
3301         else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3302                 set_entity_allocation(irentity, allocation_static);
3303
3304         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3305                 set_entity_volatility(irentity, volatility_is_volatile);
3306         }
3307 }
3308
3309
3310 typedef struct type_path_entry_t type_path_entry_t;
3311 struct type_path_entry_t {
3312         type_t           *type;
3313         ir_initializer_t *initializer;
3314         size_t            index;
3315         entity_t         *compound_entry;
3316 };
3317
3318 typedef struct type_path_t type_path_t;
3319 struct type_path_t {
3320         type_path_entry_t *path;
3321         type_t            *top_type;
3322         bool               invalid;
3323 };
3324
3325 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3326 {
3327         size_t len = ARR_LEN(path->path);
3328
3329         for (size_t i = 0; i < len; ++i) {
3330                 const type_path_entry_t *entry = & path->path[i];
3331
3332                 type_t *type = skip_typeref(entry->type);
3333                 if (is_type_compound(type)) {
3334                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3335                 } else if (is_type_array(type)) {
3336                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3337                 } else {
3338                         fprintf(stderr, "-INVALID-");
3339                 }
3340         }
3341         fprintf(stderr, "  (");
3342         print_type(path->top_type);
3343         fprintf(stderr, ")");
3344 }
3345
3346 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3347 {
3348         size_t len = ARR_LEN(path->path);
3349         assert(len > 0);
3350         return & path->path[len-1];
3351 }
3352
3353 static type_path_entry_t *append_to_type_path(type_path_t *path)
3354 {
3355         size_t len = ARR_LEN(path->path);
3356         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3357
3358         type_path_entry_t *result = & path->path[len];
3359         memset(result, 0, sizeof(result[0]));
3360         return result;
3361 }
3362
3363 static size_t get_compound_member_count(const compound_type_t *type)
3364 {
3365         compound_t *compound  = type->compound;
3366         size_t      n_members = 0;
3367         entity_t   *member    = compound->members.entities;
3368         for ( ; member != NULL; member = member->base.next) {
3369                 ++n_members;
3370         }
3371
3372         return n_members;
3373 }
3374
3375 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3376 {
3377         type_t *orig_top_type = path->top_type;
3378         type_t *top_type      = skip_typeref(orig_top_type);
3379
3380         assert(is_type_compound(top_type) || is_type_array(top_type));
3381
3382         if (ARR_LEN(path->path) == 0) {
3383                 return NULL;
3384         } else {
3385                 type_path_entry_t *top         = get_type_path_top(path);
3386                 ir_initializer_t  *initializer = top->initializer;
3387                 return get_initializer_compound_value(initializer, top->index);
3388         }
3389 }
3390
3391 static void descend_into_subtype(type_path_t *path)
3392 {
3393         type_t *orig_top_type = path->top_type;
3394         type_t *top_type      = skip_typeref(orig_top_type);
3395
3396         assert(is_type_compound(top_type) || is_type_array(top_type));
3397
3398         ir_initializer_t *initializer = get_initializer_entry(path);
3399
3400         type_path_entry_t *top = append_to_type_path(path);
3401         top->type              = top_type;
3402
3403         size_t len;
3404
3405         if (is_type_compound(top_type)) {
3406                 compound_t *compound = top_type->compound.compound;
3407                 entity_t   *entry    = compound->members.entities;
3408
3409                 top->compound_entry = entry;
3410                 top->index          = 0;
3411                 len                 = get_compound_member_count(&top_type->compound);
3412                 if (entry != NULL) {
3413                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3414                         path->top_type = entry->declaration.type;
3415                 }
3416         } else {
3417                 assert(is_type_array(top_type));
3418                 assert(top_type->array.size > 0);
3419
3420                 top->index     = 0;
3421                 path->top_type = top_type->array.element_type;
3422                 len            = top_type->array.size;
3423         }
3424         if (initializer == NULL
3425                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3426                 initializer = create_initializer_compound(len);
3427                 /* we have to set the entry at the 2nd latest path entry... */
3428                 size_t path_len = ARR_LEN(path->path);
3429                 assert(path_len >= 1);
3430                 if (path_len > 1) {
3431                         type_path_entry_t *entry        = & path->path[path_len-2];
3432                         ir_initializer_t  *tinitializer = entry->initializer;
3433                         set_initializer_compound_value(tinitializer, entry->index,
3434                                                        initializer);
3435                 }
3436         }
3437         top->initializer = initializer;
3438 }
3439
3440 static void ascend_from_subtype(type_path_t *path)
3441 {
3442         type_path_entry_t *top = get_type_path_top(path);
3443
3444         path->top_type = top->type;
3445
3446         size_t len = ARR_LEN(path->path);
3447         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3448 }
3449
3450 static void walk_designator(type_path_t *path, const designator_t *designator)
3451 {
3452         /* designators start at current object type */
3453         ARR_RESIZE(type_path_entry_t, path->path, 1);
3454
3455         for ( ; designator != NULL; designator = designator->next) {
3456                 type_path_entry_t *top         = get_type_path_top(path);
3457                 type_t            *orig_type   = top->type;
3458                 type_t            *type        = skip_typeref(orig_type);
3459
3460                 if (designator->symbol != NULL) {
3461                         assert(is_type_compound(type));
3462                         size_t    index  = 0;
3463                         symbol_t *symbol = designator->symbol;
3464
3465                         compound_t *compound = type->compound.compound;
3466                         entity_t   *iter     = compound->members.entities;
3467                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3468                                 if (iter->base.symbol == symbol) {
3469                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3470                                         break;
3471                                 }
3472                         }
3473                         assert(iter != NULL);
3474
3475                         top->type           = orig_type;
3476                         top->compound_entry = iter;
3477                         top->index          = index;
3478                         orig_type           = iter->declaration.type;
3479                 } else {
3480                         expression_t *array_index = designator->array_index;
3481                         assert(designator->array_index != NULL);
3482                         assert(is_type_array(type));
3483
3484                         long index = fold_constant(array_index);
3485                         assert(index >= 0);
3486 #ifndef NDEBUG
3487                         if (type->array.size_constant) {
3488                                 long array_size = type->array.size;
3489                                 assert(index < array_size);
3490                         }
3491 #endif
3492
3493                         top->type  = orig_type;
3494                         top->index = (size_t) index;
3495                         orig_type  = type->array.element_type;
3496                 }
3497                 path->top_type = orig_type;
3498
3499                 if (designator->next != NULL) {
3500                         descend_into_subtype(path);
3501                 }
3502         }
3503
3504         path->invalid  = false;
3505 }
3506
3507 static void advance_current_object(type_path_t *path)
3508 {
3509         if (path->invalid) {
3510                 /* TODO: handle this... */
3511                 panic("invalid initializer in ast2firm (excessive elements)");
3512         }
3513
3514         type_path_entry_t *top = get_type_path_top(path);
3515
3516         type_t *type = skip_typeref(top->type);
3517         if (is_type_union(type)) {
3518                 top->compound_entry = NULL;
3519         } else if (is_type_struct(type)) {
3520                 entity_t *entry = top->compound_entry;
3521
3522                 top->index++;
3523                 entry               = entry->base.next;
3524                 top->compound_entry = entry;
3525                 if (entry != NULL) {
3526                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3527                         path->top_type = entry->declaration.type;
3528                         return;
3529                 }
3530         } else {
3531                 assert(is_type_array(type));
3532
3533                 top->index++;
3534                 if (!type->array.size_constant || top->index < type->array.size) {
3535                         return;
3536                 }
3537         }
3538
3539         /* we're past the last member of the current sub-aggregate, try if we
3540          * can ascend in the type hierarchy and continue with another subobject */
3541         size_t len = ARR_LEN(path->path);
3542
3543         if (len > 1) {
3544                 ascend_from_subtype(path);
3545                 advance_current_object(path);
3546         } else {
3547                 path->invalid = true;
3548         }
3549 }
3550
3551
3552 static ir_initializer_t *create_ir_initializer(
3553                 const initializer_t *initializer, type_t *type);
3554
3555 static ir_initializer_t *create_ir_initializer_value(
3556                 const initializer_value_t *initializer)
3557 {
3558         if (is_type_compound(initializer->value->base.type)) {
3559                 panic("initializer creation for compounds not implemented yet");
3560         }
3561         ir_node *value = expression_to_firm(initializer->value);
3562         return create_initializer_const(value);
3563 }
3564
3565 /** test wether type can be initialized by a string constant */
3566 static bool is_string_type(type_t *type)
3567 {
3568         type_t *inner;
3569         if (is_type_pointer(type)) {
3570                 inner = skip_typeref(type->pointer.points_to);
3571         } else if(is_type_array(type)) {
3572                 inner = skip_typeref(type->array.element_type);
3573         } else {
3574                 return false;
3575         }
3576
3577         return is_type_integer(inner);
3578 }
3579
3580 static ir_initializer_t *create_ir_initializer_list(
3581                 const initializer_list_t *initializer, type_t *type)
3582 {
3583         type_path_t path;
3584         memset(&path, 0, sizeof(path));
3585         path.top_type = type;
3586         path.path     = NEW_ARR_F(type_path_entry_t, 0);
3587
3588         descend_into_subtype(&path);
3589
3590         for (size_t i = 0; i < initializer->len; ++i) {
3591                 const initializer_t *sub_initializer = initializer->initializers[i];
3592
3593                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3594                         walk_designator(&path, sub_initializer->designator.designator);
3595                         continue;
3596                 }
3597
3598                 if (sub_initializer->kind == INITIALIZER_VALUE) {
3599                         /* we might have to descend into types until we're at a scalar
3600                          * type */
3601                         while(true) {
3602                                 type_t *orig_top_type = path.top_type;
3603                                 type_t *top_type      = skip_typeref(orig_top_type);
3604
3605                                 if (is_type_scalar(top_type))
3606                                         break;
3607                                 descend_into_subtype(&path);
3608                         }
3609                 } else if (sub_initializer->kind == INITIALIZER_STRING
3610                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3611                         /* we might have to descend into types until we're at a scalar
3612                          * type */
3613                         while (true) {
3614                                 type_t *orig_top_type = path.top_type;
3615                                 type_t *top_type      = skip_typeref(orig_top_type);
3616
3617                                 if (is_string_type(top_type))
3618                                         break;
3619                                 descend_into_subtype(&path);
3620                         }
3621                 }
3622
3623                 ir_initializer_t *sub_irinitializer
3624                         = create_ir_initializer(sub_initializer, path.top_type);
3625
3626                 size_t path_len = ARR_LEN(path.path);
3627                 assert(path_len >= 1);
3628                 type_path_entry_t *entry        = & path.path[path_len-1];
3629                 ir_initializer_t  *tinitializer = entry->initializer;
3630                 set_initializer_compound_value(tinitializer, entry->index,
3631                                                sub_irinitializer);
3632
3633                 advance_current_object(&path);
3634         }
3635
3636         assert(ARR_LEN(path.path) >= 1);
3637         ir_initializer_t *result = path.path[0].initializer;
3638         DEL_ARR_F(path.path);
3639
3640         return result;
3641 }
3642
3643 static ir_initializer_t *create_ir_initializer_string(
3644                 const initializer_string_t *initializer, type_t *type)
3645 {
3646         type = skip_typeref(type);
3647
3648         size_t            string_len    = initializer->string.size;
3649         assert(type->kind == TYPE_ARRAY);
3650         assert(type->array.size_constant);
3651         size_t            len           = type->array.size;
3652         ir_initializer_t *irinitializer = create_initializer_compound(len);
3653
3654         const char *string = initializer->string.begin;
3655         ir_mode    *mode   = get_ir_mode(type->array.element_type);
3656
3657         for (size_t i = 0; i < len; ++i) {
3658                 char c = 0;
3659                 if (i < string_len)
3660                         c = string[i];
3661
3662                 tarval           *tv = new_tarval_from_long(c, mode);
3663                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3664
3665                 set_initializer_compound_value(irinitializer, i, char_initializer);
3666         }
3667
3668         return irinitializer;
3669 }
3670
3671 static ir_initializer_t *create_ir_initializer_wide_string(
3672                 const initializer_wide_string_t *initializer, type_t *type)
3673 {
3674         size_t            string_len    = initializer->string.size;
3675         assert(type->kind == TYPE_ARRAY);
3676         assert(type->array.size_constant);
3677         size_t            len           = type->array.size;
3678         ir_initializer_t *irinitializer = create_initializer_compound(len);
3679
3680         const wchar_rep_t *string = initializer->string.begin;
3681         ir_mode           *mode   = get_type_mode(ir_type_wchar_t);
3682
3683         for (size_t i = 0; i < len; ++i) {
3684                 wchar_rep_t c = 0;
3685                 if (i < string_len) {
3686                         c = string[i];
3687                 }
3688                 tarval *tv = new_tarval_from_long(c, mode);
3689                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3690
3691                 set_initializer_compound_value(irinitializer, i, char_initializer);
3692         }
3693
3694         return irinitializer;
3695 }
3696
3697 static ir_initializer_t *create_ir_initializer(
3698                 const initializer_t *initializer, type_t *type)
3699 {
3700         switch(initializer->kind) {
3701                 case INITIALIZER_STRING:
3702                         return create_ir_initializer_string(&initializer->string, type);
3703
3704                 case INITIALIZER_WIDE_STRING:
3705                         return create_ir_initializer_wide_string(&initializer->wide_string,
3706                                                                  type);
3707
3708                 case INITIALIZER_LIST:
3709                         return create_ir_initializer_list(&initializer->list, type);
3710
3711                 case INITIALIZER_VALUE:
3712                         return create_ir_initializer_value(&initializer->value);
3713
3714                 case INITIALIZER_DESIGNATOR:
3715                         panic("unexpected designator initializer found");
3716         }
3717         panic("unknown initializer");
3718 }
3719
3720 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3721                 ir_node *base_addr)
3722 {
3723         if (is_atomic_type(type)) {
3724                 ir_mode *mode = get_type_mode(type);
3725                 tarval  *zero = get_mode_null(mode);
3726                 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3727
3728                 /* TODO: bitfields */
3729                 ir_node *mem    = get_store();
3730                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3731                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3732                 set_store(proj_m);
3733         } else {
3734                 assert(is_compound_type(type));
3735
3736                 int n_members;
3737                 if (is_Array_type(type)) {
3738                         assert(has_array_upper_bound(type, 0));
3739                         n_members = get_array_upper_bound_int(type, 0);
3740                 } else {
3741                         n_members = get_compound_n_members(type);
3742                 }
3743
3744                 for (int i = 0; i < n_members; ++i) {
3745                         ir_node *addr;
3746                         ir_type *irtype;
3747                         if (is_Array_type(type)) {
3748                                 ir_entity *entity   = get_array_element_entity(type);
3749                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3750                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3751                                 ir_node   *in[1]    = { cnst };
3752                                 irtype = get_array_element_type(type);
3753                                 addr   = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3754                         } else {
3755                                 ir_entity *member = get_compound_member(type, i);
3756
3757                                 irtype = get_entity_type(member);
3758                                 addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3759                         }
3760
3761                         create_dynamic_null_initializer(irtype, dbgi, addr);
3762                 }
3763         }
3764 }
3765
3766 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3767                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3768 {
3769         switch(get_initializer_kind(initializer)) {
3770         case IR_INITIALIZER_NULL: {
3771                 create_dynamic_null_initializer(type, dbgi, base_addr);
3772                 return;
3773         }
3774         case IR_INITIALIZER_CONST: {
3775                 ir_node *node     = get_initializer_const_value(initializer);
3776                 ir_mode *mode     = get_irn_mode(node);
3777                 ir_type *ent_type = get_entity_type(entity);
3778
3779                 /* is it a bitfield type? */
3780                 if (is_Primitive_type(ent_type) &&
3781                                 get_primitive_base_type(ent_type) != NULL) {
3782                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3783                         return;
3784                 }
3785
3786                 assert(get_type_mode(type) == mode);
3787                 ir_node *mem    = get_store();
3788                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node);
3789                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3790                 set_store(proj_m);
3791                 return;
3792         }
3793         case IR_INITIALIZER_TARVAL: {
3794                 tarval  *tv       = get_initializer_tarval_value(initializer);
3795                 ir_mode *mode     = get_tarval_mode(tv);
3796                 ir_node *cnst     = new_d_Const(dbgi, mode, tv);
3797                 ir_type *ent_type = get_entity_type(entity);
3798
3799                 /* is it a bitfield type? */
3800                 if (is_Primitive_type(ent_type) &&
3801                                 get_primitive_base_type(ent_type) != NULL) {
3802                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3803                         return;
3804                 }
3805
3806                 assert(get_type_mode(type) == mode);
3807                 ir_node *mem    = get_store();
3808                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst);
3809                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3810                 set_store(proj_m);
3811                 return;
3812         }
3813         case IR_INITIALIZER_COMPOUND: {
3814                 assert(is_compound_type(type));
3815                 int n_members;
3816                 if (is_Array_type(type)) {
3817                         assert(has_array_upper_bound(type, 0));
3818                         n_members = get_array_upper_bound_int(type, 0);
3819                 } else {
3820                         n_members = get_compound_n_members(type);
3821                 }
3822
3823                 if (get_initializer_compound_n_entries(initializer)
3824                                 != (unsigned) n_members)
3825                         panic("initializer doesn't match compound type");
3826
3827                 for (int i = 0; i < n_members; ++i) {
3828                         ir_node   *addr;
3829                         ir_type   *irtype;
3830                         ir_entity *sub_entity;
3831                         if (is_Array_type(type)) {
3832                                 tarval    *index_tv = new_tarval_from_long(i, mode_uint);
3833                                 ir_node   *cnst     = new_d_Const(dbgi, mode_uint, index_tv);
3834                                 ir_node   *in[1]    = { cnst };
3835                                 irtype     = get_array_element_type(type);
3836                                 sub_entity = get_array_element_entity(type);
3837                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3838                                                        sub_entity);
3839                         } else {
3840                                 sub_entity = get_compound_member(type, i);
3841                                 irtype     = get_entity_type(sub_entity);
3842                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3843                                                              sub_entity);
3844                         }
3845
3846                         ir_initializer_t *sub_init
3847                                 = get_initializer_compound_value(initializer, i);
3848
3849                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3850                                                        addr);
3851                 }
3852                 return;
3853         }
3854         }
3855
3856         panic("invalid IR_INITIALIZER found");
3857 }
3858
3859 static void create_dynamic_initializer(ir_initializer_t *initializer,
3860                 dbg_info *dbgi, ir_entity *entity)
3861 {
3862         ir_node *frame     = get_local_frame(entity);
3863         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3864         ir_type *type      = get_entity_type(entity);
3865
3866         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3867 }
3868
3869 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3870                                      ir_entity *entity, type_t *type)
3871 {
3872         ir_node *memory = get_store();
3873         ir_node *nomem  = new_NoMem();
3874         ir_node *frame  = get_irg_frame(current_ir_graph);
3875         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
3876
3877         if (initializer->kind == INITIALIZER_VALUE) {
3878                 initializer_value_t *initializer_value = &initializer->value;
3879
3880                 ir_node *value = expression_to_firm(initializer_value->value);
3881                 type = skip_typeref(type);
3882                 assign_value(dbgi, addr, type, value);
3883                 return;
3884         }
3885
3886         if (!is_constant_initializer(initializer)) {
3887                 ir_initializer_t *irinitializer
3888                         = create_ir_initializer(initializer, type);
3889
3890                 create_dynamic_initializer(irinitializer, dbgi, entity);
3891                 return;
3892         }
3893
3894         /* create the ir_initializer */
3895         ir_graph *const old_current_ir_graph = current_ir_graph;
3896         current_ir_graph = get_const_code_irg();
3897
3898         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3899
3900         assert(current_ir_graph == get_const_code_irg());
3901         current_ir_graph = old_current_ir_graph;
3902
3903         /* create a "template" entity which is copied to the entity on the stack */
3904         ident     *const id          = id_unique("initializer.%u");
3905         ir_type   *const irtype      = get_ir_type(type);
3906         ir_type   *const global_type = get_glob_type();
3907         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3908         set_entity_ld_ident(init_entity, id);
3909
3910         set_entity_variability(init_entity, variability_initialized);
3911         set_entity_visibility(init_entity, visibility_local);
3912         set_entity_allocation(init_entity, allocation_static);
3913
3914         set_entity_initializer(init_entity, irinitializer);
3915
3916         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3917         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3918
3919         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3920         set_store(copyb_mem);
3921 }
3922
3923 static void create_initializer_local_variable_entity(entity_t *entity)
3924 {
3925         assert(entity->kind == ENTITY_VARIABLE);
3926         initializer_t *initializer = entity->variable.initializer;
3927         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
3928         ir_entity     *irentity    = entity->variable.v.entity;
3929         type_t        *type        = entity->declaration.type;
3930         create_local_initializer(initializer, dbgi, irentity, type);
3931 }
3932
3933 static void create_variable_initializer(entity_t *entity)
3934 {
3935         assert(entity->kind == ENTITY_VARIABLE);
3936         initializer_t *initializer = entity->variable.initializer;
3937         if (initializer == NULL)
3938                 return;
3939
3940         declaration_kind_t declaration_kind
3941                 = (declaration_kind_t) entity->declaration.kind;
3942         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3943                 create_initializer_local_variable_entity(entity);
3944                 return;
3945         }
3946
3947         type_t            *type = entity->declaration.type;
3948         type_qualifiers_t  tq   = get_type_qualifier(type, true);
3949
3950         if (initializer->kind == INITIALIZER_VALUE) {
3951                 initializer_value_t *initializer_value = &initializer->value;
3952                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
3953
3954                 ir_node *value = expression_to_firm(initializer_value->value);
3955                 value = do_strict_conv(dbgi, value);
3956
3957                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3958                         set_value(entity->variable.v.value_number, value);
3959                 } else {
3960                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3961
3962                         ir_entity *irentity = entity->variable.v.entity;
3963
3964                         if (tq & TYPE_QUALIFIER_CONST) {
3965                                 set_entity_variability(irentity, variability_constant);
3966                         } else {
3967                                 set_entity_variability(irentity, variability_initialized);
3968                         }
3969                         set_atomic_ent_value(irentity, value);
3970                 }
3971         } else {
3972                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
3973                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3974
3975                 ir_entity        *irentity        = entity->variable.v.entity;
3976                 ir_initializer_t *irinitializer
3977                         = create_ir_initializer(initializer, type);
3978
3979                 if (tq & TYPE_QUALIFIER_CONST) {
3980                         set_entity_variability(irentity, variability_constant);
3981                 } else {
3982                         set_entity_variability(irentity, variability_initialized);
3983                 }
3984                 set_entity_initializer(irentity, irinitializer);
3985         }
3986 }
3987
3988 static void create_variable_length_array(entity_t *entity)
3989 {
3990         assert(entity->kind == ENTITY_VARIABLE);
3991         assert(entity->variable.initializer == NULL);
3992
3993         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3994         entity->variable.v.vla_base = NULL;
3995
3996         /* TODO: record VLA somewhere so we create the free node when we leave
3997          * it's scope */
3998 }
3999
4000 static void allocate_variable_length_array(entity_t *entity)
4001 {
4002         assert(entity->kind == ENTITY_VARIABLE);
4003         assert(entity->variable.initializer == NULL);
4004         assert(get_cur_block() != NULL);
4005
4006         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4007         type_t   *type      = entity->declaration.type;
4008         ir_type  *el_type   = get_ir_type(type->array.element_type);
4009
4010         /* make sure size_node is calculated */
4011         get_type_size(type);
4012         ir_node  *elems = type->array.size_node;
4013         ir_node  *mem   = get_store();
4014         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4015
4016         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4017         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4018         set_store(proj_m);
4019
4020         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4021         entity->variable.v.vla_base = addr;
4022 }
4023
4024 /**
4025  * Creates a Firm local variable from a declaration.
4026  */
4027 static void create_local_variable(entity_t *entity)
4028 {
4029         assert(entity->kind == ENTITY_VARIABLE);
4030         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4031
4032         bool needs_entity = entity->variable.address_taken;
4033         type_t *type = skip_typeref(entity->declaration.type);
4034
4035         /* is it a variable length array? */
4036         if (is_type_array(type) && !type->array.size_constant) {
4037                 create_variable_length_array(entity);
4038                 return;
4039         } else if (is_type_array(type) || is_type_compound(type)) {
4040                 needs_entity = true;
4041         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4042                 needs_entity = true;
4043         }
4044
4045         if (needs_entity) {
4046                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4047                 create_variable_entity(entity,
4048                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4049                                        frame_type);
4050         } else {
4051                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4052                 entity->variable.v.value_number = next_value_number_function;
4053                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4054                                         entity);
4055                 ++next_value_number_function;
4056         }
4057 }
4058
4059 static void create_local_static_variable(entity_t *entity)
4060 {
4061         assert(entity->kind == ENTITY_VARIABLE);
4062         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4063
4064         type_t    *const type     = skip_typeref(entity->declaration.type);
4065         ir_type   *const var_type = entity->variable.thread_local ?
4066                 get_tls_type() : get_glob_type();
4067         ir_type   *const irtype   = get_ir_type(type);
4068         dbg_info  *const dbgi     = get_dbg_info(&entity->base.source_position);
4069
4070         size_t l = strlen(entity->base.symbol->string);
4071         char   buf[l + sizeof(".%u")];
4072         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4073         ident     *const id = id_unique(buf);
4074
4075         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4076
4077         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4078                 set_entity_volatility(irentity, volatility_is_volatile);
4079         }
4080
4081         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4082         entity->variable.v.entity = irentity;
4083         set_entity_ld_ident(irentity, id);
4084         set_entity_variability(irentity, variability_uninitialized);
4085         set_entity_visibility(irentity, visibility_local);
4086         set_entity_allocation(irentity, entity->variable.thread_local ?
4087                 allocation_automatic : allocation_static);
4088
4089         ir_graph *const old_current_ir_graph = current_ir_graph;
4090         current_ir_graph = get_const_code_irg();
4091
4092         create_variable_initializer(entity);
4093
4094         assert(current_ir_graph == get_const_code_irg());
4095         current_ir_graph = old_current_ir_graph;
4096 }
4097
4098
4099
4100 static void return_statement_to_firm(return_statement_t *statement)
4101 {
4102         if (get_cur_block() == NULL)
4103                 return;
4104
4105         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4106         type_t   *type        = current_function_entity->declaration.type;
4107         ir_type  *func_irtype = get_ir_type(type);
4108
4109
4110         ir_node *in[1];
4111         int      in_len;
4112         if (get_method_n_ress(func_irtype) > 0) {
4113                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4114
4115                 if (statement->value != NULL) {
4116                         ir_node *node = expression_to_firm(statement->value);
4117                         node  = do_strict_conv(dbgi, node);
4118                         in[0] = node;
4119                 } else {
4120                         ir_mode *mode;
4121                         if (is_compound_type(res_type)) {
4122                                 mode = mode_P_data;
4123                         } else {
4124                                 mode = get_type_mode(res_type);
4125                         }
4126                         in[0] = new_Unknown(mode);
4127                 }
4128                 in_len = 1;
4129         } else {
4130                 /* build return_value for its side effects */
4131                 if (statement->value != NULL) {
4132                         expression_to_firm(statement->value);
4133                 }
4134                 in_len = 0;
4135         }
4136
4137         ir_node  *store = get_store();
4138         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4139
4140         ir_node *end_block = get_irg_end_block(current_ir_graph);
4141         add_immBlock_pred(end_block, ret);
4142
4143         set_cur_block(NULL);
4144 }
4145
4146 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4147 {
4148         if (get_cur_block() == NULL)
4149                 return NULL;
4150
4151         return expression_to_firm(statement->expression);
4152 }
4153
4154 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4155 {
4156         entity_t *entity = compound->scope.entities;
4157         for ( ; entity != NULL; entity = entity->base.next) {
4158                 if (!is_declaration(entity))
4159                         continue;
4160
4161                 create_local_declaration(entity);
4162         }
4163
4164         ir_node     *result    = NULL;
4165         statement_t *statement = compound->statements;
4166         for ( ; statement != NULL; statement = statement->base.next) {
4167                 if (statement->base.next == NULL
4168                                 && statement->kind == STATEMENT_EXPRESSION) {
4169                         result = expression_statement_to_firm(
4170                                         &statement->expression);
4171                         break;
4172                 }
4173                 statement_to_firm(statement);
4174         }
4175
4176         return result;
4177 }
4178
4179 static void create_global_variable(entity_t *entity)
4180 {
4181         assert(entity->kind == ENTITY_VARIABLE);
4182
4183         ir_visibility vis;
4184         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4185                 case STORAGE_CLASS_STATIC: vis = visibility_local;              break;
4186                 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4187                 case STORAGE_CLASS_NONE:   vis = visibility_external_visible;   break;
4188
4189                 default: panic("Invalid storage class for global variable");
4190         }
4191
4192         ir_type *var_type = entity->variable.thread_local ?
4193                 get_tls_type() : get_glob_type();
4194         create_variable_entity(entity,
4195                         DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4196         set_entity_visibility(entity->variable.v.entity, vis);
4197 }
4198
4199 static void create_local_declaration(entity_t *entity)
4200 {
4201         assert(is_declaration(entity));
4202
4203         /* construct type */
4204         (void) get_ir_type(entity->declaration.type);
4205         if (entity->base.symbol == NULL) {
4206                 return;
4207         }
4208
4209         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4210         case STORAGE_CLASS_STATIC:
4211                 create_local_static_variable(entity);
4212                 return;
4213         case STORAGE_CLASS_EXTERN:
4214                 if (entity->kind == ENTITY_FUNCTION) {
4215                         assert(entity->function.statement == NULL);
4216                         get_function_entity(entity);
4217                 } else {
4218                         create_global_variable(entity);
4219                         create_variable_initializer(entity);
4220                 }
4221                 return;
4222         case STORAGE_CLASS_NONE:
4223         case STORAGE_CLASS_AUTO:
4224         case STORAGE_CLASS_REGISTER:
4225                 if (entity->kind == ENTITY_FUNCTION) {
4226                         if (entity->function.statement != NULL) {
4227                                 get_function_entity(entity);
4228                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4229                                 enqueue_inner_function(entity);
4230                         } else {
4231                                 get_function_entity(entity);
4232                         }
4233                 } else {
4234                         create_local_variable(entity);
4235                 }
4236                 return;
4237         case STORAGE_CLASS_TYPEDEF:
4238                 break;
4239         }
4240         panic("invalid storage class found");
4241 }
4242
4243 static void initialize_local_declaration(entity_t *entity)
4244 {
4245         if (entity->base.symbol == NULL)
4246                 return;
4247
4248         switch ((declaration_kind_t) entity->declaration.kind) {
4249         case DECLARATION_KIND_LOCAL_VARIABLE:
4250         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4251                 create_variable_initializer(entity);
4252                 return;
4253
4254         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4255                 allocate_variable_length_array(entity);
4256                 return;
4257
4258         case DECLARATION_KIND_COMPOUND_MEMBER:
4259         case DECLARATION_KIND_GLOBAL_VARIABLE:
4260         case DECLARATION_KIND_FUNCTION:
4261         case DECLARATION_KIND_INNER_FUNCTION:
4262                 return;
4263
4264         case DECLARATION_KIND_PARAMETER:
4265         case DECLARATION_KIND_PARAMETER_ENTITY:
4266                 panic("can't initialize parameters");
4267
4268         case DECLARATION_KIND_UNKNOWN:
4269                 panic("can't initialize unknown declaration");
4270         }
4271         panic("invalid declaration kind");
4272 }
4273
4274 static void declaration_statement_to_firm(declaration_statement_t *statement)
4275 {
4276         entity_t *entity = statement->declarations_begin;
4277         entity_t *end    = statement->declarations_end->base.next;
4278         for ( ; entity != end; entity = entity->base.next) {
4279                 if (!is_declaration(entity))
4280                         continue;
4281                 initialize_local_declaration(entity);
4282         }
4283 }
4284
4285 static void if_statement_to_firm(if_statement_t *statement)
4286 {
4287         ir_node *cur_block = get_cur_block();
4288
4289         ir_node *fallthrough_block = NULL;
4290
4291         /* the true (blocks) */
4292         ir_node *true_block = NULL;
4293         if (statement->true_statement != NULL) {
4294                 true_block = new_immBlock();
4295                 statement_to_firm(statement->true_statement);
4296                 if (get_cur_block() != NULL) {
4297                         ir_node *jmp = new_Jmp();
4298                         if (fallthrough_block == NULL)
4299                                 fallthrough_block = new_immBlock();
4300                         add_immBlock_pred(fallthrough_block, jmp);
4301                 }
4302         }
4303
4304         /* the false (blocks) */
4305         ir_node *false_block = NULL;
4306         if (statement->false_statement != NULL) {
4307                 false_block = new_immBlock();
4308
4309                 statement_to_firm(statement->false_statement);
4310                 if (get_cur_block() != NULL) {
4311                         ir_node *jmp = new_Jmp();
4312                         if (fallthrough_block == NULL)
4313                                 fallthrough_block = new_immBlock();
4314                         add_immBlock_pred(fallthrough_block, jmp);
4315                 }
4316         }
4317
4318         /* create the condition */
4319         if (cur_block != NULL) {
4320                 if (true_block == NULL || false_block == NULL) {
4321                         if (fallthrough_block == NULL)
4322                                 fallthrough_block = new_immBlock();
4323                         if (true_block == NULL)
4324                                 true_block = fallthrough_block;
4325                         if (false_block == NULL)
4326                                 false_block = fallthrough_block;
4327                 }
4328
4329                 set_cur_block(cur_block);
4330                 create_condition_evaluation(statement->condition, true_block,
4331                                             false_block);
4332         }
4333
4334         mature_immBlock(true_block);
4335         if (false_block != fallthrough_block && false_block != NULL) {
4336                 mature_immBlock(false_block);
4337         }
4338         if (fallthrough_block != NULL) {
4339                 mature_immBlock(fallthrough_block);
4340         }
4341
4342         set_cur_block(fallthrough_block);
4343 }
4344
4345 static void while_statement_to_firm(while_statement_t *statement)
4346 {
4347         ir_node *jmp = NULL;
4348         if (get_cur_block() != NULL) {
4349                 jmp = new_Jmp();
4350         }
4351
4352         /* create the header block */
4353         ir_node *header_block = new_immBlock();
4354         if (jmp != NULL) {
4355                 add_immBlock_pred(header_block, jmp);
4356         }
4357
4358         /* the loop body */
4359         ir_node *old_continue_label = continue_label;
4360         ir_node *old_break_label    = break_label;
4361         continue_label              = header_block;
4362         break_label                 = NULL;
4363
4364         ir_node *body_block = new_immBlock();
4365         statement_to_firm(statement->body);
4366         ir_node *false_block = break_label;
4367
4368         assert(continue_label == header_block);
4369         continue_label = old_continue_label;
4370         break_label    = old_break_label;
4371
4372         if (get_cur_block() != NULL) {
4373                 jmp = new_Jmp();
4374                 add_immBlock_pred(header_block, jmp);
4375         }
4376
4377         /* shortcut for while(true) */
4378         if (is_constant_expression(statement->condition)
4379                         && fold_constant(statement->condition) != 0) {
4380                 set_cur_block(header_block);
4381                 ir_node *header_jmp = new_Jmp();
4382                 add_immBlock_pred(body_block, header_jmp);
4383
4384                 keep_alive(body_block);
4385                 keep_all_memory(body_block);
4386                 set_cur_block(body_block);
4387         } else {
4388                 if (false_block == NULL) {
4389                         false_block = new_immBlock();
4390                 }
4391
4392                 /* create the condition */
4393                 set_cur_block(header_block);
4394
4395                 create_condition_evaluation(statement->condition, body_block,
4396                                             false_block);
4397         }
4398
4399         mature_immBlock(body_block);
4400         mature_immBlock(header_block);
4401         if (false_block != NULL) {
4402                 mature_immBlock(false_block);
4403         }
4404
4405         set_cur_block(false_block);
4406 }
4407
4408 static void do_while_statement_to_firm(do_while_statement_t *statement)
4409 {
4410         ir_node *jmp = NULL;
4411         if (get_cur_block() != NULL) {
4412                 jmp = new_Jmp();
4413         }
4414
4415         /* create the header block */
4416         ir_node *header_block = new_immBlock();
4417
4418         /* the loop body */
4419         ir_node *body_block = new_immBlock();
4420         if (jmp != NULL) {
4421                 add_immBlock_pred(body_block, jmp);
4422         }
4423
4424         ir_node *old_continue_label = continue_label;
4425         ir_node *old_break_label    = break_label;
4426         continue_label              = header_block;
4427         break_label                 = NULL;
4428
4429         statement_to_firm(statement->body);
4430         ir_node *false_block = break_label;
4431
4432         assert(continue_label == header_block);
4433         continue_label = old_continue_label;
4434         break_label    = old_break_label;
4435
4436         if (get_cur_block() != NULL) {
4437                 ir_node *body_jmp = new_Jmp();
4438                 add_immBlock_pred(header_block, body_jmp);
4439                 mature_immBlock(header_block);
4440         }
4441
4442         if (false_block == NULL) {
4443                 false_block = new_immBlock();
4444         }
4445
4446         /* create the condition */
4447         set_cur_block(header_block);
4448
4449         create_condition_evaluation(statement->condition, body_block, false_block);
4450         mature_immBlock(body_block);
4451         mature_immBlock(header_block);
4452         if (false_block != NULL) {
4453                 mature_immBlock(false_block);
4454         }
4455
4456         set_cur_block(false_block);
4457 }
4458
4459 static void for_statement_to_firm(for_statement_t *statement)
4460 {
4461         ir_node *jmp = NULL;
4462
4463         /* create declarations */
4464         entity_t *entity = statement->scope.entities;
4465         for ( ; entity != NULL; entity = entity->base.next) {
4466                 if (!is_declaration(entity))
4467                         continue;
4468
4469                 create_local_declaration(entity);
4470         }
4471
4472         if (get_cur_block() != NULL) {
4473                 entity = statement->scope.entities;
4474                 for ( ; entity != NULL; entity = entity->base.next) {
4475                         if (!is_declaration(entity))
4476                                 continue;
4477
4478                         initialize_local_declaration(entity);
4479                 }
4480
4481                 if (statement->initialisation != NULL) {
4482                         expression_to_firm(statement->initialisation);
4483                 }
4484
4485                 jmp = new_Jmp();
4486         }
4487
4488
4489         /* create the step block */
4490         ir_node *const step_block = new_immBlock();
4491         if (statement->step != NULL) {
4492                 expression_to_firm(statement->step);
4493         }
4494         ir_node *const step_jmp = new_Jmp();
4495
4496         /* create the header block */
4497         ir_node *const header_block = new_immBlock();
4498         if (jmp != NULL) {
4499                 add_immBlock_pred(header_block, jmp);
4500         }
4501         add_immBlock_pred(header_block, step_jmp);
4502
4503         /* the false block */
4504         ir_node *const false_block = new_immBlock();
4505
4506         /* the loop body */
4507         ir_node * body_block;
4508         if (statement->body != NULL) {
4509                 ir_node *const old_continue_label = continue_label;
4510                 ir_node *const old_break_label    = break_label;
4511                 continue_label = step_block;
4512                 break_label    = false_block;
4513
4514                 body_block = new_immBlock();
4515                 statement_to_firm(statement->body);
4516
4517                 assert(continue_label == step_block);
4518                 assert(break_label    == false_block);
4519                 continue_label = old_continue_label;
4520                 break_label    = old_break_label;
4521
4522                 if (get_cur_block() != NULL) {
4523                         jmp = new_Jmp();
4524                         add_immBlock_pred(step_block, jmp);
4525                 }
4526         } else {
4527                 body_block = step_block;
4528         }
4529
4530         /* create the condition */
4531         set_cur_block(header_block);
4532         if (statement->condition != NULL) {
4533                 create_condition_evaluation(statement->condition, body_block,
4534                                             false_block);
4535         } else {
4536                 keep_alive(header_block);
4537                 keep_all_memory(header_block);
4538                 jmp = new_Jmp();
4539                 add_immBlock_pred(body_block, jmp);
4540         }
4541
4542         mature_immBlock(body_block);
4543         mature_immBlock(false_block);
4544         mature_immBlock(step_block);
4545         mature_immBlock(header_block);
4546         mature_immBlock(false_block);
4547
4548         set_cur_block(false_block);
4549 }
4550
4551 static void create_jump_statement(const statement_t *statement,
4552                                   ir_node *target_block)
4553 {
4554         if (get_cur_block() == NULL)
4555                 return;
4556
4557         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4558         ir_node  *jump = new_d_Jmp(dbgi);
4559         add_immBlock_pred(target_block, jump);
4560
4561         set_cur_block(NULL);
4562 }
4563
4564 static ir_node *get_break_label(void)
4565 {
4566         if (break_label == NULL) {
4567                 ir_node *cur_block = get_cur_block();
4568                 break_label = new_immBlock();
4569                 set_cur_block(cur_block);
4570         }
4571         return break_label;
4572 }
4573
4574 static void switch_statement_to_firm(switch_statement_t *statement)
4575 {
4576         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4577
4578         ir_node *expression  = expression_to_firm(statement->expression);
4579         ir_node *cond        = new_d_Cond(dbgi, expression);
4580
4581         set_cur_block(NULL);
4582
4583         ir_node *const old_switch_cond       = current_switch_cond;
4584         ir_node *const old_break_label       = break_label;
4585         const bool     old_saw_default_label = saw_default_label;
4586         saw_default_label                    = false;
4587         current_switch_cond                  = cond;
4588         break_label                          = NULL;
4589         switch_statement_t *const old_switch = current_switch;
4590         current_switch                       = statement;
4591
4592         /* determine a free number for the default label */
4593         unsigned long num_cases = 0;
4594         long def_nr = 0;
4595         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4596                 if (l->expression == NULL) {
4597                         /* default case */
4598                         continue;
4599                 }
4600                 if (l->last_case >= l->first_case)
4601                         num_cases += l->last_case - l->first_case + 1;
4602                 if (l->last_case > def_nr)
4603                         def_nr = l->last_case;
4604         }
4605
4606         if (def_nr == INT_MAX) {
4607                 /* Bad: an overflow will occurr, we cannot be sure that the
4608                  * maximum + 1 is a free number. Scan the values a second
4609                  * time to find a free number.
4610                  */
4611                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4612
4613                 memset(bits, 0, (num_cases + 7) >> 3);
4614                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4615                         if (l->expression == NULL) {
4616                                 /* default case */
4617                                 continue;
4618                         }
4619                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4620                         if (start < num_cases && l->last_case >= 0) {
4621                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
4622                                         (unsigned long)l->last_case : num_cases - 1;
4623                                 for (unsigned long cns = start; cns <= end; ++cns) {
4624                                         bits[cns >> 3] |= (1 << (cns & 7));
4625                                 }
4626                         }
4627                 }
4628                 /* We look at the first num_cases constants:
4629                  * Either they are densed, so we took the last (num_cases)
4630                  * one, or they are non densed, so we will find one free
4631                  * there...
4632                  */
4633                 unsigned long i;
4634                 for (i = 0; i < num_cases; ++i)
4635                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4636                                 break;
4637
4638                 free(bits);
4639                 def_nr = i;
4640         } else {
4641                 ++def_nr;
4642         }
4643         statement->default_proj_nr = def_nr;
4644
4645         if (statement->body != NULL) {
4646                 statement_to_firm(statement->body);
4647         }
4648
4649         if (get_cur_block() != NULL) {
4650                 ir_node *jmp = new_Jmp();
4651                 add_immBlock_pred(get_break_label(), jmp);
4652         }
4653
4654         if (!saw_default_label) {
4655                 set_cur_block(get_nodes_block(cond));
4656                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4657                                                         statement->default_proj_nr);
4658                 add_immBlock_pred(get_break_label(), proj);
4659         }
4660
4661         if (break_label != NULL) {
4662                 mature_immBlock(break_label);
4663         }
4664         set_cur_block(break_label);
4665
4666         assert(current_switch_cond == cond);
4667         current_switch      = old_switch;
4668         current_switch_cond = old_switch_cond;
4669         break_label         = old_break_label;
4670         saw_default_label   = old_saw_default_label;
4671 }
4672
4673 static void case_label_to_firm(const case_label_statement_t *statement)
4674 {
4675         if (statement->is_empty_range)
4676                 return;
4677
4678         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4679
4680         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4681
4682         ir_node *proj;
4683         ir_node *old_block = get_nodes_block(current_switch_cond);
4684         ir_node *block     = new_immBlock();
4685
4686         set_cur_block(old_block);
4687         if (statement->expression != NULL) {
4688                 long pn     = statement->first_case;
4689                 long end_pn = statement->last_case;
4690                 assert(pn <= end_pn);
4691                 /* create jumps for all cases in the given range */
4692                 do {
4693                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4694                         add_immBlock_pred(block, proj);
4695                 } while(pn++ < end_pn);
4696         } else {
4697                 saw_default_label = true;
4698                 proj = new_d_defaultProj(dbgi, current_switch_cond,
4699                                          current_switch->default_proj_nr);
4700
4701                 add_immBlock_pred(block, proj);
4702         }
4703
4704         if (fallthrough != NULL) {
4705                 add_immBlock_pred(block, fallthrough);
4706         }
4707         mature_immBlock(block);
4708         set_cur_block(block);
4709
4710         if (statement->statement != NULL) {
4711                 statement_to_firm(statement->statement);
4712         }
4713 }
4714
4715 static void label_to_firm(const label_statement_t *statement)
4716 {
4717         ir_node *block = get_label_block(statement->label);
4718
4719         if (get_cur_block() != NULL) {
4720                 ir_node *jmp = new_Jmp();
4721                 add_immBlock_pred(block, jmp);
4722         }
4723
4724         set_cur_block(block);
4725         keep_alive(block);
4726         keep_all_memory(block);
4727
4728         if (statement->statement != NULL) {
4729                 statement_to_firm(statement->statement);
4730         }
4731 }
4732
4733 static void goto_to_firm(const goto_statement_t *statement)
4734 {
4735         if (get_cur_block() == NULL)
4736                 return;
4737
4738         if (statement->expression) {
4739                 ir_node  *irn  = expression_to_firm(statement->expression);
4740                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4741                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
4742
4743                 set_irn_link(ijmp, ijmp_list);
4744                 ijmp_list = ijmp;
4745         } else {
4746                 ir_node *block = get_label_block(statement->label);
4747                 ir_node *jmp   = new_Jmp();
4748                 add_immBlock_pred(block, jmp);
4749         }
4750         set_cur_block(NULL);
4751 }
4752
4753 static void asm_statement_to_firm(const asm_statement_t *statement)
4754 {
4755         bool needs_memory = false;
4756
4757         if (statement->is_volatile) {
4758                 needs_memory = true;
4759         }
4760
4761         size_t         n_clobbers = 0;
4762         asm_clobber_t *clobber    = statement->clobbers;
4763         for ( ; clobber != NULL; clobber = clobber->next) {
4764                 const char *clobber_str = clobber->clobber.begin;
4765
4766                 if (!be_is_valid_clobber(clobber_str)) {
4767                         errorf(&statement->base.source_position,
4768                                    "invalid clobber '%s' specified", clobber->clobber);
4769                         continue;
4770                 }
4771
4772                 if (strcmp(clobber_str, "memory") == 0) {
4773                         needs_memory = true;
4774                         continue;
4775                 }
4776
4777                 ident *id = new_id_from_str(clobber_str);
4778                 obstack_ptr_grow(&asm_obst, id);
4779                 ++n_clobbers;
4780         }
4781         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4782         ident **clobbers = NULL;
4783         if (n_clobbers > 0) {
4784                 clobbers = obstack_finish(&asm_obst);
4785         }
4786
4787         size_t n_inputs  = 0;
4788         asm_argument_t *argument = statement->inputs;
4789         for ( ; argument != NULL; argument = argument->next)
4790                 n_inputs++;
4791         size_t n_outputs = 0;
4792         argument = statement->outputs;
4793         for ( ; argument != NULL; argument = argument->next)
4794                 n_outputs++;
4795
4796         unsigned next_pos = 0;
4797
4798         ir_node *ins[n_inputs + n_outputs + 1];
4799         size_t   in_size = 0;
4800
4801         ir_asm_constraint tmp_in_constraints[n_outputs];
4802
4803         const expression_t *out_exprs[n_outputs];
4804         ir_node            *out_addrs[n_outputs];
4805         size_t              out_size = 0;
4806
4807         argument = statement->outputs;
4808         for ( ; argument != NULL; argument = argument->next) {
4809                 const char *constraints = argument->constraints.begin;
4810                 asm_constraint_flags_t asm_flags
4811                         = be_parse_asm_constraints(constraints);
4812
4813                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4814                         warningf(&statement->base.source_position,
4815                                "some constraints in '%s' are not supported", constraints);
4816                 }
4817                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4818                         errorf(&statement->base.source_position,
4819                                "some constraints in '%s' are invalid", constraints);
4820                         continue;
4821                 }
4822                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4823                         errorf(&statement->base.source_position,
4824                                "no write flag specified for output constraints '%s'",
4825                                constraints);
4826                         continue;
4827                 }
4828
4829                 unsigned pos = next_pos++;
4830                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4831                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4832                         expression_t *expr = argument->expression;
4833                         ir_node      *addr = expression_to_addr(expr);
4834                         /* in+output, construct an artifical same_as constraint on the
4835                          * input */
4836                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4837                                 char     buf[64];
4838                                 ir_node *value = get_value_from_lvalue(expr, addr);
4839
4840                                 snprintf(buf, sizeof(buf), "%u", pos);
4841
4842                                 ir_asm_constraint constraint;
4843                                 constraint.pos              = pos;
4844                                 constraint.constraint       = new_id_from_str(buf);
4845                                 constraint.mode             = get_ir_mode(expr->base.type);
4846                                 tmp_in_constraints[in_size] = constraint;
4847                                 ins[in_size] = value;
4848
4849                                 ++in_size;
4850                         }
4851
4852                         out_exprs[out_size] = expr;
4853                         out_addrs[out_size] = addr;
4854                         ++out_size;
4855                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4856                         /* pure memory ops need no input (but we have to make sure we
4857                          * attach to the memory) */
4858                         assert(! (asm_flags &
4859                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4860                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4861                         needs_memory = true;
4862
4863                         /* we need to attach the address to the inputs */
4864                         expression_t *expr = argument->expression;
4865
4866                         ir_asm_constraint constraint;
4867                         constraint.pos              = pos;
4868                         constraint.constraint       = new_id_from_str(constraints);
4869                         constraint.mode             = NULL;
4870                         tmp_in_constraints[in_size] = constraint;
4871
4872                         ins[in_size]          = expression_to_addr(expr);
4873                         ++in_size;
4874                         continue;
4875                 } else {
4876                         errorf(&statement->base.source_position,
4877                                "only modifiers but no place set in constraints '%s'",
4878                                constraints);
4879                         continue;
4880                 }
4881
4882                 ir_asm_constraint constraint;
4883                 constraint.pos        = pos;
4884                 constraint.constraint = new_id_from_str(constraints);
4885                 constraint.mode       = get_ir_mode(argument->expression->base.type);
4886
4887                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4888         }
4889         assert(obstack_object_size(&asm_obst)
4890                         == out_size * sizeof(ir_asm_constraint));
4891         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4892
4893
4894         obstack_grow(&asm_obst, tmp_in_constraints,
4895                      in_size * sizeof(tmp_in_constraints[0]));
4896         /* find and count input and output arguments */
4897         argument = statement->inputs;
4898         for ( ; argument != NULL; argument = argument->next) {
4899                 const char *constraints = argument->constraints.begin;
4900                 asm_constraint_flags_t asm_flags
4901                         = be_parse_asm_constraints(constraints);
4902
4903                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4904                         errorf(&statement->base.source_position,
4905                                "some constraints in '%s' are not supported", constraints);
4906                         continue;
4907                 }
4908                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4909                         errorf(&statement->base.source_position,
4910                                "some constraints in '%s' are invalid", constraints);
4911                         continue;
4912                 }
4913                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4914                         errorf(&statement->base.source_position,
4915                                "write flag specified for input constraints '%s'",
4916                                constraints);
4917                         continue;
4918                 }
4919
4920                 ir_node *input;
4921                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4922                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4923                         /* we can treat this as "normal" input */
4924                         input = expression_to_firm(argument->expression);
4925                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4926                         /* pure memory ops need no input (but we have to make sure we
4927                          * attach to the memory) */
4928                         assert(! (asm_flags &
4929                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4930                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4931                         needs_memory = true;
4932                         input = expression_to_addr(argument->expression);
4933                 } else {
4934                         errorf(&statement->base.source_position,
4935                                "only modifiers but no place set in constraints '%s'",
4936                                constraints);
4937                         continue;
4938                 }
4939
4940                 ir_asm_constraint constraint;
4941                 constraint.pos        = next_pos++;
4942                 constraint.constraint = new_id_from_str(constraints);
4943                 constraint.mode       = get_irn_mode(input);
4944
4945                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4946                 ins[in_size++] = input;
4947         }
4948
4949         if (needs_memory) {
4950                 ir_asm_constraint constraint;
4951                 constraint.pos        = next_pos++;
4952                 constraint.constraint = new_id_from_str("");
4953                 constraint.mode       = mode_M;
4954
4955                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4956                 ins[in_size++] = get_store();
4957         }
4958
4959         assert(obstack_object_size(&asm_obst)
4960                         == in_size * sizeof(ir_asm_constraint));
4961         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
4962
4963         /* create asm node */
4964         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4965
4966         ident *asm_text = new_id_from_str(statement->asm_text.begin);
4967
4968         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
4969                                   out_size, output_constraints,
4970                                   n_clobbers, clobbers, asm_text);
4971
4972         if (statement->is_volatile) {
4973                 set_irn_pinned(node, op_pin_state_pinned);
4974         } else {
4975                 set_irn_pinned(node, op_pin_state_floats);
4976         }
4977
4978         /* create output projs & connect them */
4979         if (needs_memory) {
4980                 ir_node *projm = new_Proj(node, mode_M, out_size+1);
4981                 set_store(projm);
4982         }
4983
4984         size_t i;
4985         for (i = 0; i < out_size; ++i) {
4986                 const expression_t *out_expr = out_exprs[i];
4987                 long                pn       = i;
4988                 ir_mode            *mode     = get_ir_mode(out_expr->base.type);
4989                 ir_node            *proj     = new_Proj(node, mode, pn);
4990                 ir_node            *addr     = out_addrs[i];
4991
4992                 set_value_for_expression_addr(out_expr, proj, addr);
4993         }
4994 }
4995
4996 static void     ms_try_statement_to_firm(ms_try_statement_t *statement) {
4997         statement_to_firm(statement->try_statement);
4998         warningf(&statement->base.source_position, "structured exception handling ignored");
4999 }
5000
5001 static void     leave_statement_to_firm(leave_statement_t *statement) {
5002         errorf(&statement->base.source_position, "__leave not supported yet");
5003 }
5004
5005 /**
5006  * Transform a statement.
5007  */
5008 static void statement_to_firm(statement_t *statement)
5009 {
5010 #ifndef NDEBUG
5011         assert(!statement->base.transformed);
5012         statement->base.transformed = true;
5013 #endif
5014
5015         switch (statement->kind) {
5016         case STATEMENT_INVALID:
5017                 panic("invalid statement found");
5018         case STATEMENT_EMPTY:
5019                 /* nothing */
5020                 return;
5021         case STATEMENT_COMPOUND:
5022                 compound_statement_to_firm(&statement->compound);
5023                 return;
5024         case STATEMENT_RETURN:
5025                 return_statement_to_firm(&statement->returns);
5026                 return;
5027         case STATEMENT_EXPRESSION:
5028                 expression_statement_to_firm(&statement->expression);
5029                 return;
5030         case STATEMENT_IF:
5031                 if_statement_to_firm(&statement->ifs);
5032                 return;
5033         case STATEMENT_WHILE:
5034                 while_statement_to_firm(&statement->whiles);
5035                 return;
5036         case STATEMENT_DO_WHILE:
5037                 do_while_statement_to_firm(&statement->do_while);
5038                 return;
5039         case STATEMENT_DECLARATION:
5040                 declaration_statement_to_firm(&statement->declaration);
5041                 return;
5042         case STATEMENT_BREAK:
5043                 create_jump_statement(statement, get_break_label());
5044                 return;
5045         case STATEMENT_CONTINUE:
5046                 create_jump_statement(statement, continue_label);
5047                 return;
5048         case STATEMENT_SWITCH:
5049                 switch_statement_to_firm(&statement->switchs);
5050                 return;
5051         case STATEMENT_CASE_LABEL:
5052                 case_label_to_firm(&statement->case_label);
5053                 return;
5054         case STATEMENT_FOR:
5055                 for_statement_to_firm(&statement->fors);
5056                 return;
5057         case STATEMENT_LABEL:
5058                 label_to_firm(&statement->label);
5059                 return;
5060         case STATEMENT_LOCAL_LABEL:
5061                 /* local labels transform the semantics of labels while parsing
5062                  * they don't need any special treatment here */
5063                 return;
5064         case STATEMENT_GOTO:
5065                 goto_to_firm(&statement->gotos);
5066                 return;
5067         case STATEMENT_ASM:
5068                 asm_statement_to_firm(&statement->asms);
5069                 return;
5070         case STATEMENT_MS_TRY:
5071                 ms_try_statement_to_firm(&statement->ms_try);
5072                 return;
5073         case STATEMENT_LEAVE:
5074                 leave_statement_to_firm(&statement->leave);
5075                 return;
5076         }
5077         panic("Statement not implemented\n");
5078 }
5079
5080 static int count_local_variables(const entity_t *entity,
5081                                  const entity_t *const end)
5082 {
5083         int count = 0;
5084         for (; entity != end; entity = entity->base.next) {
5085                 type_t *type;
5086                 bool    address_taken;
5087
5088                 if (entity->kind == ENTITY_VARIABLE) {
5089                         type          = skip_typeref(entity->declaration.type);
5090                         address_taken = entity->variable.address_taken;
5091                 } else if (entity->kind == ENTITY_PARAMETER) {
5092                         type          = skip_typeref(entity->declaration.type);
5093                         address_taken = entity->parameter.address_taken;
5094                 } else {
5095                         continue;
5096                 }
5097
5098                 if (!address_taken && is_type_scalar(type))
5099                         ++count;
5100         }
5101         return count;
5102 }
5103
5104 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5105 {
5106         int *const count = env;
5107
5108         switch (stmt->kind) {
5109         case STATEMENT_DECLARATION: {
5110                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5111                 *count += count_local_variables(decl_stmt->declarations_begin,
5112                                                                                 decl_stmt->declarations_end->base.next);
5113                 break;
5114         }
5115
5116         case STATEMENT_FOR:
5117                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5118                 break;
5119
5120         default:
5121                 break;
5122         }
5123 }
5124
5125 static int get_function_n_local_vars(entity_t *entity)
5126 {
5127         int count = 0;
5128
5129         /* count parameters */
5130         count += count_local_variables(entity->function.parameters.entities, NULL);
5131
5132         /* count local variables declared in body */
5133         walk_statements(entity->function.statement, count_local_variables_in_stmt,
5134                         &count);
5135         return count;
5136 }
5137
5138 static void initialize_function_parameters(entity_t *entity)
5139 {
5140         assert(entity->kind == ENTITY_FUNCTION);
5141         ir_graph *irg             = current_ir_graph;
5142         ir_node  *args            = get_irg_args(irg);
5143         ir_node  *start_block     = get_irg_start_block(irg);
5144         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5145
5146         int       n         = 0;
5147         entity_t *parameter = entity->function.parameters.entities;
5148         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5149                 assert(parameter->kind == ENTITY_PARAMETER);
5150                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5151                 type_t *type = skip_typeref(parameter->declaration.type);
5152
5153                 bool needs_entity = parameter->parameter.address_taken;
5154                 assert(!is_type_array(type));
5155                 if (is_type_compound(type)) {
5156                         needs_entity = true;
5157                 }
5158
5159                 if (needs_entity) {
5160                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5161                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5162                         set_entity_ident(entity, id);
5163
5164                         parameter->declaration.kind
5165                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5166                         parameter->parameter.v.entity = entity;
5167                         continue;
5168                 }
5169
5170                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5171                 ir_mode *param_mode   = get_type_mode(param_irtype);
5172
5173                 long     pn    = n;
5174                 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5175
5176                 ir_mode *mode = get_ir_mode(type);
5177                 value = create_conv(NULL, value, mode);
5178                 value = do_strict_conv(NULL, value);
5179
5180                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5181                 parameter->parameter.v.value_number = next_value_number_function;
5182                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5183                                         parameter);
5184                 ++next_value_number_function;
5185
5186                 set_value(parameter->parameter.v.value_number, value);
5187         }
5188 }
5189
5190 /**
5191  * Handle additional decl modifiers for IR-graphs
5192  *
5193  * @param irg            the IR-graph
5194  * @param dec_modifiers  additional modifiers
5195  */
5196 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5197 {
5198         if (decl_modifiers & DM_NORETURN) {
5199                 /* TRUE if the declaration includes the Microsoft
5200                    __declspec(noreturn) specifier. */
5201                 set_irg_additional_property(irg, mtp_property_noreturn);
5202         }
5203         if (decl_modifiers & DM_NOTHROW) {
5204                 /* TRUE if the declaration includes the Microsoft
5205                    __declspec(nothrow) specifier. */
5206                 set_irg_additional_property(irg, mtp_property_nothrow);
5207         }
5208         if (decl_modifiers & DM_NAKED) {
5209                 /* TRUE if the declaration includes the Microsoft
5210                    __declspec(naked) specifier. */
5211                 set_irg_additional_property(irg, mtp_property_naked);
5212         }
5213         if (decl_modifiers & DM_FORCEINLINE) {
5214                 /* TRUE if the declaration includes the
5215                    Microsoft __forceinline specifier. */
5216                 set_irg_inline_property(irg, irg_inline_forced);
5217         }
5218         if (decl_modifiers & DM_NOINLINE) {
5219                 /* TRUE if the declaration includes the Microsoft
5220                    __declspec(noinline) specifier. */
5221                 set_irg_inline_property(irg, irg_inline_forbidden);
5222         }
5223 }
5224
5225 static void add_function_pointer(ir_type *segment, ir_entity *method,
5226                                  const char *unique_template)
5227 {
5228         ir_type   *method_type  = get_entity_type(method);
5229         ident     *id           = id_unique(unique_template);
5230         ir_type   *ptr_type     = new_type_pointer(id, method_type, mode_P_code);
5231
5232         ident     *ide          = id_unique(unique_template);
5233         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5234         ir_graph  *irg          = get_const_code_irg();
5235         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5236                                                            method, NULL);
5237
5238         set_entity_compiler_generated(ptr, 1);
5239         set_entity_variability(ptr, variability_constant);
5240         set_atomic_ent_value(ptr, val);
5241 }
5242
5243 /**
5244  * Generate possible IJmp branches to a given label block.
5245  */
5246 static void gen_ijmp_branches(ir_node *block) {
5247         ir_node *ijmp;
5248         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5249                 add_immBlock_pred(block, ijmp);
5250         }
5251 }
5252
5253 /**
5254  * Create code for a function.
5255  */
5256 static void create_function(entity_t *entity)
5257 {
5258         assert(entity->kind == ENTITY_FUNCTION);
5259         ir_entity *function_entity = get_function_entity(entity);
5260
5261         if (entity->function.statement == NULL)
5262                 return;
5263
5264         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5265                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5266                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5267         }
5268         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5269                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5270                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5271         }
5272
5273         current_function_entity = entity;
5274         current_function_name   = NULL;
5275         current_funcsig         = NULL;
5276
5277         assert(all_labels == NULL);
5278         all_labels = NEW_ARR_F(label_t *, 0);
5279         ijmp_list  = NULL;
5280
5281         int       n_local_vars = get_function_n_local_vars(entity);
5282         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5283
5284         ir_graph *old_current_function = current_function;
5285         current_function = irg;
5286
5287         set_irg_fp_model(irg, firm_opt.fp_model);
5288         tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5289         set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5290
5291         ir_node *first_block = get_cur_block();
5292
5293         /* set inline flags */
5294         if (entity->function.is_inline)
5295                 set_irg_inline_property(irg, irg_inline_recomended);
5296         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5297
5298         next_value_number_function = 0;
5299         initialize_function_parameters(entity);
5300
5301         statement_to_firm(entity->function.statement);
5302
5303         ir_node *end_block = get_irg_end_block(irg);
5304
5305         /* do we have a return statement yet? */
5306         if (get_cur_block() != NULL) {
5307                 type_t *type = skip_typeref(entity->declaration.type);
5308                 assert(is_type_function(type));
5309                 const function_type_t *func_type   = &type->function;
5310                 const type_t          *return_type
5311                         = skip_typeref(func_type->return_type);
5312
5313                 ir_node *ret;
5314                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5315                         ret = new_Return(get_store(), 0, NULL);
5316                 } else {
5317                         ir_mode *mode;
5318                         if (is_type_scalar(return_type)) {
5319                                 mode = get_ir_mode(func_type->return_type);
5320                         } else {
5321                                 mode = mode_P_data;
5322                         }
5323
5324                         ir_node *in[1];
5325                         /* §5.1.2.2.3 main implicitly returns 0 */
5326                         if (is_main(entity)) {
5327                                 in[0] = new_Const(mode, get_mode_null(mode));
5328                         } else {
5329                                 in[0] = new_Unknown(mode);
5330                         }
5331                         ret = new_Return(get_store(), 1, in);
5332                 }
5333                 add_immBlock_pred(end_block, ret);
5334         }
5335
5336         bool has_computed_gotos = false;
5337         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5338                 label_t *label = all_labels[i];
5339                 if (label->address_taken) {
5340                         gen_ijmp_branches(label->block);
5341                         has_computed_gotos = true;
5342                 }
5343                 mature_immBlock(label->block);
5344         }
5345         if (has_computed_gotos) {
5346                 /* if we have computed goto's in the function, we cannot inline it */
5347                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5348                         warningf(&entity->base.source_position,
5349                                  "function '%Y' can never be inlined because it contains a computed goto",
5350                                  entity->base.symbol);
5351                 }
5352                 set_irg_inline_property(irg, irg_inline_forbidden);
5353         }
5354
5355         DEL_ARR_F(all_labels);
5356         all_labels = NULL;
5357
5358         mature_immBlock(first_block);
5359         mature_immBlock(end_block);
5360
5361         irg_finalize_cons(irg);
5362
5363         /* finalize the frame type */
5364         ir_type *frame_type = get_irg_frame_type(irg);
5365         int      n          = get_compound_n_members(frame_type);
5366         int      align_all  = 4;
5367         int      offset     = 0;
5368         for (int i = 0; i < n; ++i) {
5369                 ir_entity *entity      = get_compound_member(frame_type, i);
5370                 ir_type   *entity_type = get_entity_type(entity);
5371
5372                 int align = get_type_alignment_bytes(entity_type);
5373                 if (align > align_all)
5374                         align_all = align;
5375                 int misalign = 0;
5376                 if (align > 0) {
5377                         misalign  = offset % align;
5378                         if (misalign > 0) {
5379                                 offset += align - misalign;
5380                         }
5381                 }
5382
5383                 set_entity_offset(entity, offset);
5384                 offset += get_type_size_bytes(entity_type);
5385         }
5386         set_type_size_bytes(frame_type, offset);
5387         set_type_alignment_bytes(frame_type, align_all);
5388
5389         irg_vrfy(irg);
5390         current_function = old_current_function;
5391
5392         /* create inner functions */
5393         entity_t *inner;
5394         for (inner = next_inner_function(); inner != NULL;
5395              inner = next_inner_function()) {
5396                 create_function(inner);
5397         }
5398 }
5399
5400 static void scope_to_firm(scope_t *scope)
5401 {
5402         /* first pass: create declarations */
5403         entity_t *entity = scope->entities;
5404         for ( ; entity != NULL; entity = entity->base.next) {
5405                 if (entity->base.symbol == NULL)
5406                         continue;
5407
5408                 if (entity->kind == ENTITY_FUNCTION) {
5409                         get_function_entity(entity);
5410                 } else if (entity->kind == ENTITY_VARIABLE) {
5411                         create_global_variable(entity);
5412                 }
5413         }
5414
5415         /* second pass: create code/initializers */
5416         entity = scope->entities;
5417         for ( ; entity != NULL; entity = entity->base.next) {
5418                 if (entity->base.symbol == NULL)
5419                         continue;
5420
5421                 if (entity->kind == ENTITY_FUNCTION) {
5422                         create_function(entity);
5423                 } else if (entity->kind == ENTITY_VARIABLE) {
5424                         assert(entity->declaration.kind
5425                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5426                         current_ir_graph = get_const_code_irg();
5427                         create_variable_initializer(entity);
5428                 }
5429         }
5430 }
5431
5432 void init_ast2firm(void)
5433 {
5434         obstack_init(&asm_obst);
5435         init_atomic_modes();
5436
5437         /* OS option must be set to the backend */
5438         switch (firm_opt.os_support) {
5439         case OS_SUPPORT_MINGW:
5440                 create_ld_ident = create_name_win32;
5441                 break;
5442         case OS_SUPPORT_LINUX:
5443                 create_ld_ident = create_name_linux_elf;
5444                 break;
5445         case OS_SUPPORT_MACHO:
5446                 create_ld_ident = create_name_macho;
5447                 break;
5448         default:
5449                 panic("unexpected OS support mode");
5450         }
5451
5452         /* create idents for all known runtime functions */
5453         for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5454                 rts_idents[i] = new_id_from_str(rts_data[i].name);
5455         }
5456
5457         entitymap_init(&entitymap);
5458 }
5459
5460 static void init_ir_types(void)
5461 {
5462         static int ir_types_initialized = 0;
5463         if (ir_types_initialized)
5464                 return;
5465         ir_types_initialized = 1;
5466
5467         ir_type_int        = get_ir_type(type_int);
5468         ir_type_const_char = get_ir_type(type_const_char);
5469         ir_type_wchar_t    = get_ir_type(type_wchar_t);
5470         ir_type_void       = get_ir_type(type_void);
5471 }
5472
5473 void exit_ast2firm(void)
5474 {
5475         entitymap_destroy(&entitymap);
5476         obstack_free(&asm_obst, NULL);
5477 }
5478
5479 static void global_asm_to_firm(statement_t *s)
5480 {
5481         for (; s != NULL; s = s->base.next) {
5482                 assert(s->kind == STATEMENT_ASM);
5483
5484                 char const *const text = s->asms.asm_text.begin;
5485                 size_t            size = s->asms.asm_text.size;
5486
5487                 /* skip the last \0 */
5488                 if (text[size - 1] == '\0')
5489                         --size;
5490
5491                 ident *const id = new_id_from_chars(text, size);
5492                 add_irp_asm(id);
5493         }
5494 }
5495
5496 void translation_unit_to_firm(translation_unit_t *unit)
5497 {
5498         /* just to be sure */
5499         continue_label           = NULL;
5500         break_label              = NULL;
5501         current_switch_cond      = NULL;
5502         current_translation_unit = unit;
5503
5504         init_ir_types();
5505         inner_functions = NEW_ARR_F(entity_t *, 0);
5506
5507         scope_to_firm(&unit->scope);
5508         global_asm_to_firm(unit->global_asm);
5509
5510         DEL_ARR_F(inner_functions);
5511         inner_functions  = NULL;
5512
5513         current_ir_graph         = NULL;
5514         current_translation_unit = NULL;
5515 }