nsz Git - cparser/blob - ast2firm.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2009 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 "adt/util.h"
  36 #include "symbol_t.h"
  37 #include "token_t.h"
  38 #include "type_t.h"
  39 #include "ast_t.h"
  40 #include "entity_t.h"
  41 #include "parser.h"
  42 #include "diagnostic.h"
  43 #include "lang_features.h"
  44 #include "types.h"
  45 #include "type_hash.h"
  46 #include "mangle.h"
  47 #include "walk_statements.h"
  48 #include "warning.h"
  49 #include "printer.h"
  50 #include "entitymap_t.h"
  51 #include "driver/firm_opt.h"
  52 #include "driver/firm_cmdline.h"
  53
  54 typedef struct trampoline_region trampoline_region;
  55 struct trampoline_region {
  56         ir_entity        *function;    /**< The function that is called by this trampoline */
  57         ir_entity        *region;      /**< created region for the trampoline */
  58 };
  59
  60 static const backend_params *be_params;
  61
  62 static ir_type *ir_type_char;
  63 static ir_type *ir_type_const_char;
  64 static ir_type *ir_type_wchar_t;
  65 static ir_type *ir_type_void;
  66 static ir_type *ir_type_int;
  67
  68 /* architecture specific floating point arithmetic mode (if any) */
  69 static ir_mode *mode_float_arithmetic;
  70
  71 /* alignment of stack parameters */
  72 static unsigned stack_param_align;
  73
  74 static int        next_value_number_function;
  75 static ir_node   *continue_label;
  76 static ir_node   *break_label;
  77 static ir_node   *current_switch_cond;
  78 static bool       saw_default_label;
  79 static label_t  **all_labels;
  80 static entity_t **inner_functions;
  81 static ir_node   *ijmp_list;
  82 static bool       constant_folding;
  83 static bool       initializer_use_bitfield_basetype;
  84
  85 extern bool       have_const_functions;
  86
  87 static const entity_t     *current_function_entity;
  88 static ir_node            *current_function_name;
  89 static ir_node            *current_funcsig;
  90 static switch_statement_t *current_switch;
  91 static ir_graph           *current_function;
  92 static translation_unit_t *current_translation_unit;
  93 static trampoline_region  *current_trampolines;
  94 static ir_type            *current_outer_frame;
  95 static ir_type            *current_outer_value_type;
  96 static ir_node            *current_static_link;
  97
  98 static entitymap_t  entitymap;
  99
 100 static struct obstack asm_obst;
 101
 102 typedef enum declaration_kind_t {
 103         DECLARATION_KIND_UNKNOWN,
 104         DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
 105         DECLARATION_KIND_GLOBAL_VARIABLE,
 106         DECLARATION_KIND_LOCAL_VARIABLE,
 107         DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
 108         DECLARATION_KIND_PARAMETER,
 109         DECLARATION_KIND_PARAMETER_ENTITY,
 110         DECLARATION_KIND_FUNCTION,
 111         DECLARATION_KIND_COMPOUND_MEMBER,
 112         DECLARATION_KIND_INNER_FUNCTION
 113 } declaration_kind_t;
 114
 115 static ir_mode *get_ir_mode_storage(type_t *type);
 116 /*
 117  * get arithmetic mode for a type. This is different from get_ir_mode_storage,
 118  * int that it returns bigger modes for floating point on some platforms
 119  * (x87 internally does arithemtic with 80bits)
 120  */
 121 static ir_mode *get_ir_mode_arithmetic(type_t *type);
 122
 123 static ir_type *get_ir_type_incomplete(type_t *type);
 124
 125 static void enqueue_inner_function(entity_t *entity)
 126 {
 127         if (inner_functions == NULL)
 128                 inner_functions = NEW_ARR_F(entity_t *, 0);
 129         ARR_APP1(entity_t*, inner_functions, entity);
 130 }
 131
 132 static ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
 133 {
 134         const entity_t *entity = get_irg_loc_description(irg, pos);
 135
 136         if (entity != NULL) {
 137                 warningf(&entity->base.source_position,
 138                          "%s '%#T' might be used uninitialized",
 139                          get_entity_kind_name(entity->kind),
 140                          entity->declaration.type, entity->base.symbol);
 141         }
 142         return new_r_Unknown(irg, mode);
 143 }
 144
 145 static const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
 146 {
 147         const source_position_t *pos = (const source_position_t*) dbg;
 148         if (pos == NULL)
 149                 return NULL;
 150         if (line != NULL)
 151                 *line = pos->linenr;
 152         return pos->input_name;
 153 }
 154
 155 static dbg_info *get_dbg_info(const source_position_t *pos)
 156 {
 157         return (dbg_info*) pos;
 158 }
 159
 160 static void dbg_print_type_dbg_info(char *buffer, size_t buffer_size,
 161                                     const type_dbg_info *dbg)
 162 {
 163         assert(dbg != NULL);
 164         print_to_buffer(buffer, buffer_size);
 165         const type_t *type = (const type_t*) dbg;
 166         print_type(type);
 167         finish_print_to_buffer();
 168 }
 169
 170 static type_dbg_info *get_type_dbg_info_(const type_t *type)
 171 {
 172         return (type_dbg_info*) type;
 173 }
 174
 175 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
 176
 177 static ir_mode *mode_int, *mode_uint;
 178
 179 static ir_node *_expression_to_firm(const expression_t *expression);
 180 static ir_node *expression_to_firm(const expression_t *expression);
 181 static void create_local_declaration(entity_t *entity);
 182
 183 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
 184 {
 185         unsigned flags = get_atomic_type_flags(kind);
 186         unsigned size  = get_atomic_type_size(kind);
 187         if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
 188                         && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
 189                 char            name[64];
 190                 ir_mode_sort    sort;
 191                 unsigned        bit_size     = size * 8;
 192                 bool            is_signed    = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
 193                 unsigned        modulo_shift;
 194                 ir_mode_arithmetic arithmetic;
 195
 196                 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
 197                         assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
 198                         snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
 199                                  bit_size);
 200                         sort         = irms_int_number;
 201                         arithmetic   = irma_twos_complement;
 202                         modulo_shift = bit_size < machine_size ? machine_size : bit_size;
 203                 } else {
 204                         assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
 205                         snprintf(name, sizeof(name), "F%u", bit_size);
 206                         sort         = irms_float_number;
 207                         arithmetic   = irma_ieee754;
 208                         modulo_shift = 0;
 209                 }
 210                 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 211                                    modulo_shift);
 212         }
 213
 214         return NULL;
 215 }
 216
 217 /**
 218  * Initialises the atomic modes depending on the machine size.
 219  */
 220 static void init_atomic_modes(void)
 221 {
 222         for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
 223                 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
 224         }
 225         mode_int  = atomic_modes[ATOMIC_TYPE_INT];
 226         mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
 227
 228         /* there's no real void type in firm */
 229         atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
 230
 231         /* initialize pointer modes */
 232         char            name[64];
 233         ir_mode_sort    sort         = irms_reference;
 234         unsigned        bit_size     = machine_size;
 235         bool            is_signed    = 0;
 236         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 237         unsigned        modulo_shift
 238                 = bit_size < machine_size ? machine_size : bit_size;
 239
 240         snprintf(name, sizeof(name), "p%u", machine_size);
 241         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 242                                         modulo_shift);
 243
 244         set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
 245         set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
 246
 247         /* Hmm, pointers should be machine size */
 248         set_modeP_data(ptr_mode);
 249         set_modeP_code(ptr_mode);
 250 }
 251
 252 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
 253 {
 254         assert(kind <= ATOMIC_TYPE_LAST);
 255         return atomic_modes[kind];
 256 }
 257
 258 static ir_node *get_vla_size(array_type_t *const type)
 259 {
 260         ir_node *size_node = type->size_node;
 261         if (size_node == NULL) {
 262                 size_node = expression_to_firm(type->size_expression);
 263                 type->size_node = size_node;
 264         }
 265         return size_node;
 266 }
 267
 268 /**
 269  * Return a node representing the size of a type.
 270  */
 271 static ir_node *get_type_size_node(type_t *type)
 272 {
 273         type = skip_typeref(type);
 274
 275         if (is_type_array(type) && type->array.is_vla) {
 276                 ir_node *size_node = get_vla_size(&type->array);
 277                 ir_node *elem_size = get_type_size_node(type->array.element_type);
 278                 ir_mode *mode      = get_irn_mode(size_node);
 279                 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
 280                 return real_size;
 281         }
 282
 283         ir_mode *mode = get_ir_mode_storage(type_size_t);
 284         symconst_symbol sym;
 285         sym.type_p = get_ir_type(type);
 286         return new_SymConst(mode, sym, symconst_type_size);
 287 }
 288
 289 static unsigned count_parameters(const function_type_t *function_type)
 290 {
 291         unsigned count = 0;
 292
 293         function_parameter_t *parameter = function_type->parameters;
 294         for ( ; parameter != NULL; parameter = parameter->next) {
 295                 ++count;
 296         }
 297
 298         return count;
 299 }
 300
 301 /**
 302  * Creates a Firm type for an atomic type
 303  */
 304 static ir_type *create_atomic_type(atomic_type_kind_t akind, const type_t *type)
 305 {
 306         ir_mode        *mode      = atomic_modes[akind];
 307         type_dbg_info  *dbgi      = get_type_dbg_info_(type);
 308         ir_type        *irtype    = new_d_type_primitive(mode, dbgi);
 309         il_alignment_t  alignment = get_atomic_type_alignment(akind);
 310
 311         set_type_alignment_bytes(irtype, alignment);
 312
 313         return irtype;
 314 }
 315
 316 /**
 317  * Creates a Firm type for a complex type
 318  */
 319 static ir_type *create_complex_type(const complex_type_t *type)
 320 {
 321         atomic_type_kind_t  kind = type->akind;
 322         ir_mode            *mode = atomic_modes[kind];
 323         ident              *id   = get_mode_ident(mode);
 324
 325         (void) id;
 326
 327         /* FIXME: finish the array */
 328         return NULL;
 329 }
 330
 331 /**
 332  * Creates a Firm type for an imaginary type
 333  */
 334 static ir_type *create_imaginary_type(imaginary_type_t *type)
 335 {
 336         return create_atomic_type(type->akind, (const type_t*) type);
 337 }
 338
 339 /**
 340  * return type of a parameter (and take transparent union gnu extension into
 341  * account)
 342  */
 343 static type_t *get_parameter_type(type_t *orig_type)
 344 {
 345         type_t *type = skip_typeref(orig_type);
 346         if (is_type_union(type)
 347                         && get_type_modifiers(orig_type) & DM_TRANSPARENT_UNION) {
 348                 compound_t *compound = type->compound.compound;
 349                 type                 = compound->members.entities->declaration.type;
 350         }
 351
 352         return type;
 353 }
 354
 355 static ir_type *create_method_type(const function_type_t *function_type, bool for_closure)
 356 {
 357         type_t        *return_type  = skip_typeref(function_type->return_type);
 358
 359         int            n_parameters = count_parameters(function_type)
 360                                        + (for_closure ? 1 : 0);
 361         int            n_results    = return_type == type_void ? 0 : 1;
 362         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) function_type);
 363         ir_type       *irtype       = new_d_type_method(n_parameters, n_results, dbgi);
 364
 365         if (return_type != type_void) {
 366                 ir_type *restype = get_ir_type(return_type);
 367                 set_method_res_type(irtype, 0, restype);
 368         }
 369
 370         function_parameter_t *parameter = function_type->parameters;
 371         int                   n         = 0;
 372         if (for_closure) {
 373                 ir_type *p_irtype = get_ir_type(type_void_ptr);
 374                 set_method_param_type(irtype, n, p_irtype);
 375                 ++n;
 376         }
 377         for ( ; parameter != NULL; parameter = parameter->next) {
 378                 type_t  *type     = get_parameter_type(parameter->type);
 379                 ir_type *p_irtype = get_ir_type(type);
 380                 set_method_param_type(irtype, n, p_irtype);
 381                 ++n;
 382         }
 383
 384         bool is_variadic = function_type->variadic;
 385
 386         if (is_variadic)
 387                 set_method_variadicity(irtype, variadicity_variadic);
 388
 389         unsigned cc = get_method_calling_convention(irtype);
 390         switch (function_type->calling_convention) {
 391         case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
 392         case CC_CDECL:
 393 is_cdecl:
 394                 set_method_calling_convention(irtype, SET_CDECL(cc));
 395                 break;
 396
 397         case CC_STDCALL:
 398                 if (is_variadic)
 399                         goto is_cdecl;
 400
 401                 /* only non-variadic function can use stdcall, else use cdecl */
 402                 set_method_calling_convention(irtype, SET_STDCALL(cc));
 403                 break;
 404
 405         case CC_FASTCALL:
 406                 if (is_variadic)
 407                         goto is_cdecl;
 408                 /* only non-variadic function can use fastcall, else use cdecl */
 409                 set_method_calling_convention(irtype, SET_FASTCALL(cc));
 410                 break;
 411
 412         case CC_THISCALL:
 413                 /* Hmm, leave default, not accepted by the parser yet. */
 414                 break;
 415         }
 416
 417         if (for_closure)
 418                 set_method_calling_convention(irtype, get_method_calling_convention(irtype) | cc_this_call);
 419
 420         return irtype;
 421 }
 422
 423 static ir_type *create_pointer_type(pointer_type_t *type)
 424 {
 425         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 426         type_t        *points_to    = type->points_to;
 427         ir_type       *ir_points_to = get_ir_type_incomplete(points_to);
 428         ir_type       *ir_type      = new_d_type_pointer(ir_points_to, dbgi);
 429
 430         return ir_type;
 431 }
 432
 433 static ir_type *create_reference_type(reference_type_t *type)
 434 {
 435         type_dbg_info *dbgi         = get_type_dbg_info_((const type_t*) type);
 436         type_t        *refers_to    = type->refers_to;
 437         ir_type       *ir_refers_to = get_ir_type_incomplete(refers_to);
 438         ir_type       *ir_type      = new_d_type_pointer(ir_refers_to, dbgi);
 439
 440         return ir_type;
 441 }
 442
 443 static ir_type *create_array_type(array_type_t *type)
 444 {
 445         type_dbg_info *dbgi            = get_type_dbg_info_((const type_t*) type);
 446         type_t        *element_type    = type->element_type;
 447         ir_type       *ir_element_type = get_ir_type(element_type);
 448         ir_type       *ir_type         = new_d_type_array(1, ir_element_type, dbgi);
 449
 450         const int align = get_type_alignment_bytes(ir_element_type);
 451         set_type_alignment_bytes(ir_type, align);
 452
 453         if (type->size_constant) {
 454                 int n_elements = type->size;
 455
 456                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 457
 458                 size_t elemsize = get_type_size_bytes(ir_element_type);
 459                 if (elemsize % align > 0) {
 460                         elemsize += align - (elemsize % align);
 461                 }
 462                 set_type_size_bytes(ir_type, n_elements * elemsize);
 463         } else {
 464                 set_array_lower_bound_int(ir_type, 0, 0);
 465         }
 466         set_type_state(ir_type, layout_fixed);
 467
 468         return ir_type;
 469 }
 470
 471 /**
 472  * Return the signed integer type of size bits.
 473  *
 474  * @param size   the size
 475  */
 476 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
 477                                                  unsigned size,
 478                                                                                                  const type_t *type)
 479 {
 480         static ir_mode *s_modes[64 + 1] = {NULL, };
 481         ir_type *res;
 482         ir_mode *mode;
 483
 484         if (size <= 0 || size > 64)
 485                 return NULL;
 486
 487         mode = s_modes[size];
 488         if (mode == NULL) {
 489                 char name[32];
 490
 491                 snprintf(name, sizeof(name), "bf_I%u", size);
 492                 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
 493                                    size <= 32 ? 32 : size );
 494                 s_modes[size] = mode;
 495         }
 496
 497         type_dbg_info *dbgi = get_type_dbg_info_(type);
 498         res                 = new_d_type_primitive(mode, dbgi);
 499         set_primitive_base_type(res, base_tp);
 500
 501         return res;
 502 }
 503
 504 /**
 505  * Return the unsigned integer type of size bits.
 506  *
 507  * @param size   the size
 508  */
 509 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
 510                                                    unsigned size,
 511                                                                                                    const type_t *type)
 512 {
 513         static ir_mode *u_modes[64 + 1] = {NULL, };
 514         ir_type *res;
 515         ir_mode *mode;
 516
 517         if (size <= 0 || size > 64)
 518                 return NULL;
 519
 520         mode = u_modes[size];
 521         if (mode == NULL) {
 522                 char name[32];
 523
 524                 snprintf(name, sizeof(name), "bf_U%u", size);
 525                 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
 526                                    size <= 32 ? 32 : size );
 527                 u_modes[size] = mode;
 528         }
 529
 530         type_dbg_info *dbgi = get_type_dbg_info_(type);
 531         res = new_d_type_primitive(mode, dbgi);
 532         set_primitive_base_type(res, base_tp);
 533
 534         return res;
 535 }
 536
 537 static ir_type *create_bitfield_type(bitfield_type_t *const type)
 538 {
 539         type_t *base = skip_typeref(type->base_type);
 540         assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
 541         ir_type *irbase = get_ir_type(base);
 542
 543         unsigned size = type->bit_size;
 544
 545         assert(!is_type_float(base));
 546         if (is_type_signed(base)) {
 547                 return get_signed_int_type_for_bit_size(irbase, size,
 548                                                         (const type_t*) type);
 549         } else {
 550                 return get_unsigned_int_type_for_bit_size(irbase, size,
 551                                                           (const type_t*) type);
 552         }
 553 }
 554
 555 #define INVALID_TYPE ((ir_type_ptr)-1)
 556
 557 enum {
 558         COMPOUND_IS_STRUCT = false,
 559         COMPOUND_IS_UNION  = true
 560 };
 561
 562 /**
 563  * Construct firm type from ast struct type.
 564  */
 565 static ir_type *create_compound_type(compound_type_t *type,
 566                                      bool incomplete, bool is_union)
 567 {
 568         compound_t *compound = type->compound;
 569
 570         if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
 571                 return compound->irtype;
 572         }
 573
 574         symbol_t *symbol = compound->base.symbol;
 575         ident    *id;
 576         if (symbol != NULL) {
 577                 id = new_id_from_str(symbol->string);
 578         } else {
 579                 if (is_union) {
 580                         id = id_unique("__anonymous_union.%u");
 581                 } else {
 582                         id = id_unique("__anonymous_struct.%u");
 583                 }
 584         }
 585
 586         ir_type *irtype;
 587         if (is_union) {
 588                 irtype = new_type_union(id);
 589         } else {
 590                 irtype = new_type_struct(id);
 591         }
 592
 593         compound->irtype_complete = false;
 594         compound->irtype          = irtype;
 595
 596         if (incomplete)
 597                 return irtype;
 598
 599         if (is_union) {
 600                 layout_union_type(type);
 601         } else {
 602                 layout_struct_type(type);
 603         }
 604
 605         compound->irtype_complete = true;
 606
 607         entity_t *entry = compound->members.entities;
 608         for ( ; entry != NULL; entry = entry->base.next) {
 609                 if (entry->kind != ENTITY_COMPOUND_MEMBER)
 610                         continue;
 611
 612                 symbol_t *symbol     = entry->base.symbol;
 613                 type_t   *entry_type = entry->declaration.type;
 614                 ident    *ident;
 615                 if (symbol == NULL) {
 616                         /* anonymous bitfield member, skip */
 617                         if (entry_type->kind == TYPE_BITFIELD)
 618                                 continue;
 619                         assert(entry_type->kind == TYPE_COMPOUND_STRUCT
 620                                         || entry_type->kind == TYPE_COMPOUND_UNION);
 621                         ident = id_unique("anon.%u");
 622                 } else {
 623                         ident = new_id_from_str(symbol->string);
 624                 }
 625
 626                 dbg_info *dbgi       = get_dbg_info(&entry->base.source_position);
 627
 628                 ir_type   *entry_irtype = get_ir_type(entry_type);
 629                 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
 630
 631                 set_entity_offset(entity, entry->compound_member.offset);
 632                 set_entity_offset_bits_remainder(entity,
 633                                                  entry->compound_member.bit_offset);
 634
 635                 assert(entry->declaration.kind == DECLARATION_KIND_UNKNOWN);
 636                 entry->declaration.kind       = DECLARATION_KIND_COMPOUND_MEMBER;
 637                 entry->compound_member.entity = entity;
 638         }
 639
 640         set_type_alignment_bytes(irtype, compound->alignment);
 641         set_type_size_bytes(irtype, compound->size);
 642         set_type_state(irtype, layout_fixed);
 643
 644         return irtype;
 645 }
 646
 647 static ir_type *create_enum_type(enum_type_t *const type)
 648 {
 649         type->base.firm_type = ir_type_int;
 650
 651         ir_mode   *const mode    = mode_int;
 652         ir_tarval *const one     = get_mode_one(mode);
 653         ir_tarval *      tv_next = get_mode_null(mode);
 654
 655         bool constant_folding_old = constant_folding;
 656         constant_folding = true;
 657
 658         enum_t   *enume = type->enume;
 659         entity_t *entry = enume->base.next;
 660         for (; entry != NULL; entry = entry->base.next) {
 661                 if (entry->kind != ENTITY_ENUM_VALUE)
 662                         break;
 663
 664                 expression_t *const init = entry->enum_value.value;
 665                 if (init != NULL) {
 666                         ir_node *const cnst = expression_to_firm(init);
 667                         if (!is_Const(cnst)) {
 668                                 panic("couldn't fold constant");
 669                         }
 670                         tv_next = get_Const_tarval(cnst);
 671                 }
 672                 entry->enum_value.tv = tv_next;
 673                 tv_next = tarval_add(tv_next, one);
 674         }
 675
 676         constant_folding = constant_folding_old;
 677
 678         return create_atomic_type(type->akind, (const type_t*) type);
 679 }
 680
 681 static ir_type *get_ir_type_incomplete(type_t *type)
 682 {
 683         assert(type != NULL);
 684         type = skip_typeref(type);
 685
 686         if (type->base.firm_type != NULL) {
 687                 assert(type->base.firm_type != INVALID_TYPE);
 688                 return type->base.firm_type;
 689         }
 690
 691         switch (type->kind) {
 692         case TYPE_COMPOUND_STRUCT:
 693                 return create_compound_type(&type->compound, true, COMPOUND_IS_STRUCT);
 694         case TYPE_COMPOUND_UNION:
 695                 return create_compound_type(&type->compound, true, COMPOUND_IS_UNION);
 696         default:
 697                 return get_ir_type(type);
 698         }
 699 }
 700
 701 ir_type *get_ir_type(type_t *type)
 702 {
 703         assert(type != NULL);
 704
 705         type = skip_typeref(type);
 706
 707         if (type->base.firm_type != NULL) {
 708                 assert(type->base.firm_type != INVALID_TYPE);
 709                 return type->base.firm_type;
 710         }
 711
 712         ir_type *firm_type = NULL;
 713         switch (type->kind) {
 714         case TYPE_ERROR:
 715                 /* Happens while constant folding, when there was an error */
 716                 return create_atomic_type(ATOMIC_TYPE_VOID, NULL);
 717
 718         case TYPE_ATOMIC:
 719                 firm_type = create_atomic_type(type->atomic.akind, type);
 720                 break;
 721         case TYPE_COMPLEX:
 722                 firm_type = create_complex_type(&type->complex);
 723                 break;
 724         case TYPE_IMAGINARY:
 725                 firm_type = create_imaginary_type(&type->imaginary);
 726                 break;
 727         case TYPE_FUNCTION:
 728                 firm_type = create_method_type(&type->function, false);
 729                 break;
 730         case TYPE_POINTER:
 731                 firm_type = create_pointer_type(&type->pointer);
 732                 break;
 733         case TYPE_REFERENCE:
 734                 firm_type = create_reference_type(&type->reference);
 735                 break;
 736         case TYPE_ARRAY:
 737                 firm_type = create_array_type(&type->array);
 738                 break;
 739         case TYPE_COMPOUND_STRUCT:
 740                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_STRUCT);
 741                 break;
 742         case TYPE_COMPOUND_UNION:
 743                 firm_type = create_compound_type(&type->compound, false, COMPOUND_IS_UNION);
 744                 break;
 745         case TYPE_ENUM:
 746                 firm_type = create_enum_type(&type->enumt);
 747                 break;
 748         case TYPE_BUILTIN:
 749                 firm_type = get_ir_type(type->builtin.real_type);
 750                 break;
 751         case TYPE_BITFIELD:
 752                 firm_type = create_bitfield_type(&type->bitfield);
 753                 break;
 754
 755         case TYPE_TYPEOF:
 756         case TYPE_TYPEDEF:
 757         case TYPE_INVALID:
 758                 break;
 759         }
 760         if (firm_type == NULL)
 761                 panic("unknown type found");
 762
 763         type->base.firm_type = firm_type;
 764         return firm_type;
 765 }
 766
 767 static ir_mode *get_ir_mode_storage(type_t *type)
 768 {
 769         ir_type *irtype = get_ir_type(type);
 770
 771         /* firm doesn't report a mode for arrays somehow... */
 772         if (is_Array_type(irtype)) {
 773                 return mode_P_data;
 774         }
 775
 776         ir_mode *mode = get_type_mode(irtype);
 777         assert(mode != NULL);
 778         return mode;
 779 }
 780
 781 static ir_mode *get_ir_mode_arithmetic(type_t *type)
 782 {
 783         ir_mode *mode = get_ir_mode_storage(type);
 784         if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
 785                 return mode_float_arithmetic;
 786         }
 787
 788         return mode;
 789 }
 790
 791 /** Names of the runtime functions. */
 792 static const struct {
 793         int        id;           /**< the rts id */
 794         int        n_res;        /**< number of return values */
 795         const char *name;        /**< the name of the rts function */
 796         int        n_params;     /**< number of parameters */
 797         unsigned   flags;        /**< language flags */
 798 } rts_data[] = {
 799         { rts_debugbreak, 0, "__debugbreak", 0, _MS },
 800         { rts_abort,      0, "abort",        0, _C89 },
 801         { rts_alloca,     1, "alloca",       1, _ALL },
 802         { rts_abs,        1, "abs",          1, _C89 },
 803         { rts_labs,       1, "labs",         1, _C89 },
 804         { rts_llabs,      1, "llabs",        1, _C99 },
 805         { rts_imaxabs,    1, "imaxabs",      1, _C99 },
 806
 807         { rts_fabs,       1, "fabs",         1, _C89 },
 808         { rts_sqrt,       1, "sqrt",         1, _C89 },
 809         { rts_cbrt,       1, "cbrt",         1, _C99 },
 810         { rts_exp,        1, "exp",          1, _C89 },
 811         { rts_exp2,       1, "exp2",         1, _C89 },
 812         { rts_exp10,      1, "exp10",        1, _GNUC },
 813         { rts_log,        1, "log",          1, _C89 },
 814         { rts_log2,       1, "log2",         1, _C89 },
 815         { rts_log10,      1, "log10",        1, _C89 },
 816         { rts_pow,        1, "pow",          2, _C89 },
 817         { rts_sin,        1, "sin",          1, _C89 },
 818         { rts_cos,        1, "cos",          1, _C89 },
 819         { rts_tan,        1, "tan",          1, _C89 },
 820         { rts_asin,       1, "asin",         1, _C89 },
 821         { rts_acos,       1, "acos",         1, _C89 },
 822         { rts_atan,       1, "atan",         1, _C89 },
 823         { rts_sinh,       1, "sinh",         1, _C89 },
 824         { rts_cosh,       1, "cosh",         1, _C89 },
 825         { rts_tanh,       1, "tanh",         1, _C89 },
 826
 827         { rts_fabsf,      1, "fabsf",        1, _C99 },
 828         { rts_sqrtf,      1, "sqrtf",        1, _C99 },
 829         { rts_cbrtf,      1, "cbrtf",        1, _C99 },
 830         { rts_expf,       1, "expf",         1, _C99 },
 831         { rts_exp2f,      1, "exp2f",        1, _C99 },
 832         { rts_exp10f,     1, "exp10f",       1, _GNUC },
 833         { rts_logf,       1, "logf",         1, _C99 },
 834         { rts_log2f,      1, "log2f",        1, _C99 },
 835         { rts_log10f,     1, "log10f",       1, _C99 },
 836         { rts_powf,       1, "powf",         2, _C99 },
 837         { rts_sinf,       1, "sinf",         1, _C99 },
 838         { rts_cosf,       1, "cosf",         1, _C99 },
 839         { rts_tanf,       1, "tanf",         1, _C99 },
 840         { rts_asinf,      1, "asinf",        1, _C99 },
 841         { rts_acosf,      1, "acosf",        1, _C99 },
 842         { rts_atanf,      1, "atanf",        1, _C99 },
 843         { rts_sinhf,      1, "sinhf",        1, _C99 },
 844         { rts_coshf,      1, "coshf",        1, _C99 },
 845         { rts_tanhf,      1, "tanhf",        1, _C99 },
 846
 847         { rts_fabsl,      1, "fabsl",        1, _C99 },
 848         { rts_sqrtl,      1, "sqrtl",        1, _C99 },
 849         { rts_cbrtl,      1, "cbrtl",        1, _C99 },
 850         { rts_expl,       1, "expl",         1, _C99 },
 851         { rts_exp2l,      1, "exp2l",        1, _C99 },
 852         { rts_exp10l,     1, "exp10l",       1, _GNUC },
 853         { rts_logl,       1, "logl",         1, _C99 },
 854         { rts_log2l,      1, "log2l",        1, _C99 },
 855         { rts_log10l,     1, "log10l",       1, _C99 },
 856         { rts_powl,       1, "powl",         2, _C99 },
 857         { rts_sinl,       1, "sinl",         1, _C99 },
 858         { rts_cosl,       1, "cosl",         1, _C99 },
 859         { rts_tanl,       1, "tanl",         1, _C99 },
 860         { rts_asinl,      1, "asinl",        1, _C99 },
 861         { rts_acosl,      1, "acosl",        1, _C99 },
 862         { rts_atanl,      1, "atanl",        1, _C99 },
 863         { rts_sinhl,      1, "sinhl",        1, _C99 },
 864         { rts_coshl,      1, "coshl",        1, _C99 },
 865         { rts_tanhl,      1, "tanhl",        1, _C99 },
 866
 867         { rts_strcmp,     1, "strcmp",       2, _C89 },
 868         { rts_strncmp,    1, "strncmp",      3, _C89 },
 869         { rts_strcpy,     1, "strcpy",       2, _C89 },
 870         { rts_strlen,     1, "strlen",       1, _C89 },
 871         { rts_memcpy,     1, "memcpy",       3, _C89 },
 872         { rts_mempcpy,    1, "mempcpy",      3, _GNUC },
 873         { rts_memmove,    1, "memmove",      3, _C89 },
 874         { rts_memset,     1, "memset",       3, _C89 },
 875         { rts_memcmp,     1, "memcmp",       3, _C89 },
 876 };
 877
 878 static ident *rts_idents[lengthof(rts_data)];
 879
 880 static create_ld_ident_func create_ld_ident = create_name_linux_elf;
 881
 882 void set_create_ld_ident(ident *(*func)(entity_t*))
 883 {
 884         create_ld_ident = func;
 885 }
 886
 887 /**
 888  * Handle GNU attributes for entities
 889  *
 890  * @param ent   the entity
 891  * @param decl  the routine declaration
 892  */
 893 static void handle_decl_modifiers(ir_entity *irentity, entity_t *entity)
 894 {
 895         assert(is_declaration(entity));
 896         decl_modifiers_t modifiers = entity->declaration.modifiers;
 897
 898         if (is_method_entity(irentity)) {
 899                 if (modifiers & DM_PURE) {
 900                         set_entity_additional_properties(irentity, mtp_property_pure);
 901                 }
 902                 if (modifiers & DM_CONST) {
 903                         add_entity_additional_properties(irentity, mtp_property_const);
 904                         have_const_functions = true;
 905                 }
 906         }
 907         if (modifiers & DM_USED) {
 908                 add_entity_linkage(irentity, IR_LINKAGE_HIDDEN_USER);
 909         }
 910         if (modifiers & DM_WEAK) {
 911                 add_entity_linkage(irentity, IR_LINKAGE_WEAK);
 912         }
 913 }
 914
 915 static bool is_main(entity_t *entity)
 916 {
 917         static symbol_t *sym_main = NULL;
 918         if (sym_main == NULL) {
 919                 sym_main = symbol_table_insert("main");
 920         }
 921
 922         if (entity->base.symbol != sym_main)
 923                 return false;
 924         /* must be in outermost scope */
 925         if (entity->base.parent_scope != &current_translation_unit->scope)
 926                 return false;
 927
 928         return true;
 929 }
 930
 931 /**
 932  * Creates an entity representing a function.
 933  *
 934  * @param entity       the function declaration/definition
 935  * @param owner_type   the owner type of this function, NULL
 936  *                     for global functions
 937  */
 938 static ir_entity *get_function_entity(entity_t *entity, ir_type *owner_type)
 939 {
 940         assert(entity->kind == ENTITY_FUNCTION);
 941         if (entity->function.irentity != NULL) {
 942                 return entity->function.irentity;
 943         }
 944
 945         entity_t *original_entity = entity;
 946         if (entity->function.btk != bk_none) {
 947                 entity = get_builtin_replacement(entity);
 948                 if (entity == NULL)
 949                         return NULL;
 950         }
 951
 952         if (is_main(entity)) {
 953                 /* force main to C linkage */
 954                 type_t *type = entity->declaration.type;
 955                 assert(is_type_function(type));
 956                 if (type->function.linkage != LINKAGE_C) {
 957                         type_t *new_type           = duplicate_type(type);
 958                         new_type->function.linkage = LINKAGE_C;
 959                         type                       = identify_new_type(new_type);
 960                         entity->declaration.type   = type;
 961                 }
 962         }
 963
 964         symbol_t *symbol = entity->base.symbol;
 965         ident    *id     = new_id_from_str(symbol->string);
 966
 967         /* already an entity defined? */
 968         ir_entity *irentity = entitymap_get(&entitymap, symbol);
 969         bool const has_body = entity->function.statement != NULL;
 970         if (irentity != NULL) {
 971                 if (get_entity_visibility(irentity) == ir_visibility_external
 972                                 && has_body) {
 973                         set_entity_visibility(irentity, ir_visibility_default);
 974                 }
 975                 goto entity_created;
 976         }
 977
 978         ir_type *ir_type_method;
 979         if (entity->function.need_closure)
 980                 ir_type_method = create_method_type(&entity->declaration.type->function, true);
 981         else
 982                 ir_type_method = get_ir_type(entity->declaration.type);
 983
 984         bool nested_function = false;
 985         if (owner_type == NULL)
 986                 owner_type = get_glob_type();
 987         else
 988                 nested_function = true;
 989
 990         dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
 991         irentity             = new_d_entity(owner_type, id, ir_type_method, dbgi);
 992
 993         ident *ld_id;
 994         if (nested_function)
 995                 ld_id = id_unique("inner.%u");
 996         else
 997                 ld_id = create_ld_ident(entity);
 998         set_entity_ld_ident(irentity, ld_id);
 999
1000         handle_decl_modifiers(irentity, entity);
1001
1002         if (! nested_function) {
1003                 /* static inline             => local
1004                  * extern inline             => local
1005                  * inline without definition => local
1006                  * inline with definition    => external_visible */
1007                 storage_class_tag_t const storage_class
1008                         = (storage_class_tag_t) entity->declaration.storage_class;
1009                 bool                const is_inline     = entity->function.is_inline;
1010
1011                 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1012                     set_entity_visibility(irentity, ir_visibility_default);
1013                 } else if (storage_class == STORAGE_CLASS_STATIC ||
1014                            (is_inline && has_body)) {
1015                     set_entity_visibility(irentity, ir_visibility_local);
1016                 } else if (has_body) {
1017                     set_entity_visibility(irentity, ir_visibility_default);
1018                 } else {
1019                     set_entity_visibility(irentity, ir_visibility_external);
1020                 }
1021         } else {
1022                 /* nested functions are always local */
1023                 set_entity_visibility(irentity, ir_visibility_local);
1024         }
1025
1026         /* We should check for file scope here, but as long as we compile C only
1027            this is not needed. */
1028         if (!freestanding && !has_body) {
1029                 /* check for a known runtime function */
1030                 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1031                         if (id != rts_idents[i])
1032                                 continue;
1033
1034                         function_type_t *function_type
1035                                 = &entity->declaration.type->function;
1036                         /* rts_entities code can't handle a "wrong" number of parameters */
1037                         if (function_type->unspecified_parameters)
1038                                 continue;
1039
1040                         /* check number of parameters */
1041                         int n_params = count_parameters(function_type);
1042                         if (n_params != rts_data[i].n_params)
1043                                 continue;
1044
1045                         type_t *return_type = skip_typeref(function_type->return_type);
1046                         int     n_res       = return_type != type_void ? 1 : 0;
1047                         if (n_res != rts_data[i].n_res)
1048                                 continue;
1049
1050                         /* ignore those rts functions not necessary needed for current mode */
1051                         if ((c_mode & rts_data[i].flags) == 0)
1052                                 continue;
1053                         assert(rts_entities[rts_data[i].id] == NULL);
1054                         rts_entities[rts_data[i].id] = irentity;
1055                 }
1056         }
1057
1058         entitymap_insert(&entitymap, symbol, irentity);
1059
1060 entity_created:
1061         original_entity->declaration.kind  = DECLARATION_KIND_FUNCTION;
1062         original_entity->function.irentity = irentity;
1063
1064         return irentity;
1065 }
1066
1067 /**
1068  * Creates a SymConst for a given entity.
1069  *
1070  * @param dbgi    debug info
1071  * @param mode    the (reference) mode for the SymConst
1072  * @param entity  the entity
1073  */
1074 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1075                                 ir_entity *entity)
1076 {
1077         assert(entity != NULL);
1078         union symconst_symbol sym;
1079         sym.entity_p = entity;
1080         return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1081 }
1082
1083 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1084 {
1085         ir_mode *value_mode = get_irn_mode(value);
1086
1087         if (value_mode == dest_mode || is_Bad(value))
1088                 return value;
1089
1090         if (dest_mode == mode_b) {
1091                 ir_node *zero = new_Const(get_mode_null(value_mode));
1092                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
1093                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1094                 return proj;
1095         }
1096
1097         return new_d_Conv(dbgi, value, dest_mode);
1098 }
1099
1100 /**
1101  * Creates a SymConst node representing a wide string literal.
1102  *
1103  * @param literal   the wide string literal
1104  */
1105 static ir_node *wide_string_literal_to_firm(
1106                 const string_literal_expression_t *literal)
1107 {
1108         ir_type  *const global_type = get_glob_type();
1109         ir_type  *const elem_type   = ir_type_wchar_t;
1110         dbg_info *const dbgi        = get_dbg_info(&literal->base.source_position);
1111         ir_type  *const type        = new_type_array(1, elem_type);
1112
1113         ident     *const id     = id_unique("str.%u");
1114         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1115         set_entity_ld_ident(entity, id);
1116         set_entity_visibility(entity, ir_visibility_private);
1117         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1118
1119         ir_mode      *const mode = get_type_mode(elem_type);
1120         const size_t        slen = wstrlen(&literal->value);
1121
1122         set_array_lower_bound_int(type, 0, 0);
1123         set_array_upper_bound_int(type, 0, slen);
1124         set_type_size_bytes(type, slen * get_mode_size_bytes(mode));
1125         set_type_state(type, layout_fixed);
1126
1127         ir_initializer_t *initializer = create_initializer_compound(slen);
1128         const char              *p    = literal->value.begin;
1129         for (size_t i = 0; i < slen; ++i) {
1130                 assert(p < literal->value.begin + literal->value.size);
1131                 utf32             v   = read_utf8_char(&p);
1132                 ir_tarval        *tv  = new_tarval_from_long(v, mode);
1133                 ir_initializer_t *val = create_initializer_tarval(tv);
1134                 set_initializer_compound_value(initializer, i, val);
1135         }
1136         set_entity_initializer(entity, initializer);
1137
1138         return create_symconst(dbgi, mode_P_data, entity);
1139 }
1140
1141 /**
1142  * Creates a SymConst node representing a string constant.
1143  *
1144  * @param src_pos    the source position of the string constant
1145  * @param id_prefix  a prefix for the name of the generated string constant
1146  * @param value      the value of the string constant
1147  */
1148 static ir_node *string_to_firm(const source_position_t *const src_pos,
1149                                const char *const id_prefix,
1150                                const string_t *const value)
1151 {
1152         ir_type  *const global_type = get_glob_type();
1153         dbg_info *const dbgi        = get_dbg_info(src_pos);
1154         ir_type  *const type        = new_type_array(1, ir_type_const_char);
1155
1156         ident     *const id     = id_unique(id_prefix);
1157         ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1158         set_entity_ld_ident(entity, id);
1159         set_entity_visibility(entity, ir_visibility_private);
1160         add_entity_linkage(entity, IR_LINKAGE_CONSTANT);
1161
1162         ir_type *const elem_type = ir_type_const_char;
1163         ir_mode *const mode      = get_type_mode(elem_type);
1164
1165         const char* const string = value->begin;
1166         const size_t      slen   = value->size;
1167
1168         set_array_lower_bound_int(type, 0, 0);
1169         set_array_upper_bound_int(type, 0, slen);
1170         set_type_size_bytes(type, slen);
1171         set_type_state(type, layout_fixed);
1172
1173         ir_initializer_t *initializer = create_initializer_compound(slen);
1174         for (size_t i = 0; i < slen; ++i) {
1175                 ir_tarval        *tv  = new_tarval_from_long(string[i], mode);
1176                 ir_initializer_t *val = create_initializer_tarval(tv);
1177                 set_initializer_compound_value(initializer, i, val);
1178         }
1179         set_entity_initializer(entity, initializer);
1180
1181         return create_symconst(dbgi, mode_P_data, entity);
1182 }
1183
1184 static bool try_create_integer(literal_expression_t *literal,
1185                                type_t *type, unsigned char base)
1186 {
1187         const char *string = literal->value.begin;
1188         size_t      size   = literal->value.size;
1189
1190         assert(type->kind == TYPE_ATOMIC);
1191         atomic_type_kind_t akind = type->atomic.akind;
1192
1193         ir_mode   *mode = atomic_modes[akind];
1194         ir_tarval *tv   = new_integer_tarval_from_str(string, size, 1, base, mode);
1195         if (tv == tarval_bad)
1196                 return false;
1197
1198         literal->base.type    = type;
1199         literal->target_value = tv;
1200         return true;
1201 }
1202
1203 static void create_integer_tarval(literal_expression_t *literal)
1204 {
1205         unsigned  us     = 0;
1206         unsigned  ls     = 0;
1207         symbol_t *suffix = literal->suffix;
1208         /* parse suffix */
1209         if (suffix != NULL) {
1210                 for (const char *c = suffix->string; *c != '\0'; ++c) {
1211                         if (*c == 'u' || *c == 'U') { ++us; }
1212                         if (*c == 'l' || *c == 'L') { ++ls; }
1213                 }
1214         }
1215
1216         unsigned base;
1217         switch (literal->base.kind) {
1218                 case EXPR_LITERAL_INTEGER_OCTAL:       base =  8; break;
1219                 case EXPR_LITERAL_INTEGER:             base = 10; break;
1220                 case EXPR_LITERAL_INTEGER_HEXADECIMAL: base = 16; break;
1221                 default: panic("invalid literal kind");
1222         }
1223
1224         tarval_int_overflow_mode_t old_mode = tarval_get_integer_overflow_mode();
1225
1226         /* now try if the constant is small enough for some types */
1227         tarval_set_integer_overflow_mode(TV_OVERFLOW_BAD);
1228         if (ls < 1) {
1229                 if (us == 0 && try_create_integer(literal, type_int, base))
1230                         goto finished;
1231                 if ((us == 1 || base != 10)
1232                                 && try_create_integer(literal, type_unsigned_int, base))
1233                         goto finished;
1234         }
1235         if (ls < 2) {
1236                 if (us == 0 && try_create_integer(literal, type_long, base))
1237                         goto finished;
1238                 if ((us == 1 || base != 10)
1239                                 && try_create_integer(literal, type_unsigned_long, base))
1240                         goto finished;
1241         }
1242         /* last try? then we should not report tarval_bad */
1243         if (us != 1 && base == 10)
1244                 tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1245         if (us == 0 && try_create_integer(literal, type_long_long, base))
1246                 goto finished;
1247
1248         /* last try */
1249         assert(us == 1 || base != 10);
1250         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
1251         bool res = try_create_integer(literal, type_unsigned_long_long, base);
1252         if (!res)
1253                 panic("internal error when parsing number literal");
1254
1255 finished:
1256         tarval_set_integer_overflow_mode(old_mode);
1257 }
1258
1259 void determine_literal_type(literal_expression_t *literal)
1260 {
1261         switch (literal->base.kind) {
1262         case EXPR_LITERAL_INTEGER:
1263         case EXPR_LITERAL_INTEGER_OCTAL:
1264         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1265                 create_integer_tarval(literal);
1266                 return;
1267         default:
1268                 break;
1269         }
1270 }
1271
1272 /**
1273  * Creates a Const node representing a constant.
1274  */
1275 static ir_node *literal_to_firm(const literal_expression_t *literal)
1276 {
1277         type_t     *type   = skip_typeref(literal->base.type);
1278         ir_mode    *mode   = get_ir_mode_storage(type);
1279         const char *string = literal->value.begin;
1280         size_t      size   = literal->value.size;
1281         ir_tarval  *tv;
1282
1283         switch (literal->base.kind) {
1284         case EXPR_LITERAL_WIDE_CHARACTER: {
1285                 utf32  v = read_utf8_char(&string);
1286                 char   buf[128];
1287                 size_t len = snprintf(buf, sizeof(buf), UTF32_PRINTF_FORMAT, v);
1288
1289                 tv = new_tarval_from_str(buf, len, mode);
1290                 goto make_const;
1291         }
1292         case EXPR_LITERAL_CHARACTER: {
1293                 long long int v;
1294                 if (size == 1 && char_is_signed) {
1295                         v = (signed char)string[0];
1296                 } else {
1297                         v = 0;
1298                         for (size_t i = 0; i < size; ++i) {
1299                                 v = (v << 8) | ((unsigned char)string[i]);
1300                         }
1301                 }
1302                 char   buf[128];
1303                 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1304
1305                 tv = new_tarval_from_str(buf, len, mode);
1306                 goto make_const;
1307         }
1308         case EXPR_LITERAL_INTEGER:
1309         case EXPR_LITERAL_INTEGER_OCTAL:
1310         case EXPR_LITERAL_INTEGER_HEXADECIMAL:
1311                 assert(literal->target_value != NULL);
1312                 tv = literal->target_value;
1313                 goto make_const;
1314         case EXPR_LITERAL_FLOATINGPOINT:
1315                 tv = new_tarval_from_str(string, size, mode);
1316                 goto make_const;
1317         case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: {
1318                 char buffer[size + 2];
1319                 memcpy(buffer, "0x", 2);
1320                 memcpy(buffer+2, string, size);
1321                 tv = new_tarval_from_str(buffer, size+2, mode);
1322                 goto make_const;
1323         }
1324         case EXPR_LITERAL_BOOLEAN:
1325                 if (string[0] == 't') {
1326                         tv = get_mode_one(mode);
1327                 } else {
1328                         assert(string[0] == 'f');
1329                         tv = get_mode_null(mode);
1330                 }
1331                 goto make_const;
1332         case EXPR_LITERAL_MS_NOOP:
1333                 tv = get_mode_null(mode);
1334                 goto make_const;
1335         default:
1336                 break;
1337         }
1338         panic("Invalid literal kind found");
1339
1340 make_const: ;
1341         dbg_info *dbgi       = get_dbg_info(&literal->base.source_position);
1342         ir_node  *res        = new_d_Const(dbgi, tv);
1343         ir_mode  *mode_arith = get_ir_mode_arithmetic(type);
1344         return create_conv(dbgi, res, mode_arith);
1345 }
1346
1347 /*
1348  * Allocate an area of size bytes aligned at alignment
1349  * at a frame type.
1350  */
1351 static ir_entity *alloc_trampoline(ir_type *frame_type, int size, unsigned alignment)
1352 {
1353         static unsigned area_cnt = 0;
1354         char buf[32];
1355
1356         ir_type *tp = new_type_array(1, ir_type_char);
1357         set_array_bounds_int(tp, 0, 0, size);
1358         set_type_alignment_bytes(tp, alignment);
1359
1360         snprintf(buf, sizeof(buf), "trampolin%u", area_cnt++);
1361         ident *name = new_id_from_str(buf);
1362         ir_entity *area = new_entity(frame_type, name, tp);
1363
1364         /* mark this entity as compiler generated */
1365         set_entity_compiler_generated(area, 1);
1366         return area;
1367 }
1368
1369 /**
1370  * Return a node representing a trampoline region
1371  * for a given function entity.
1372  *
1373  * @param dbgi    debug info
1374  * @param entity  the function entity
1375  */
1376 static ir_node *get_trampoline_region(dbg_info *dbgi, ir_entity *entity)
1377 {
1378         ir_entity *region = NULL;
1379         int        i;
1380
1381         if (current_trampolines != NULL) {
1382                 for (i = ARR_LEN(current_trampolines) - 1; i >= 0; --i) {
1383                         if (current_trampolines[i].function == entity) {
1384                                 region = current_trampolines[i].region;
1385                                 break;
1386                         }
1387                 }
1388         } else {
1389                 current_trampolines = NEW_ARR_F(trampoline_region, 0);
1390         }
1391         ir_graph *irg = current_ir_graph;
1392         if (region == NULL) {
1393                 /* create a new region */
1394                 ir_type           *frame_tp = get_irg_frame_type(irg);
1395                 trampoline_region  reg;
1396                 reg.function = entity;
1397
1398                 reg.region   = alloc_trampoline(frame_tp,
1399                                                 be_params->trampoline_size,
1400                                                 be_params->trampoline_align);
1401                 ARR_APP1(trampoline_region, current_trampolines, reg);
1402                 region = reg.region;
1403         }
1404         return new_d_simpleSel(dbgi, get_irg_no_mem(irg), get_irg_frame(irg),
1405                                region);
1406 }
1407
1408 /**
1409  * Creates a trampoline for a function represented by an entity.
1410  *
1411  * @param dbgi    debug info
1412  * @param mode    the (reference) mode for the function address
1413  * @param entity  the function entity
1414  */
1415 static ir_node *create_trampoline(dbg_info *dbgi, ir_mode *mode,
1416                                   ir_entity *entity)
1417 {
1418         assert(entity != NULL);
1419         ir_node *in[3];
1420         in[0] = get_trampoline_region(dbgi, entity);
1421         in[1] = create_symconst(dbgi, mode, entity);
1422         in[2] = get_irg_frame(current_ir_graph);
1423
1424         ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_inner_trampoline, get_unknown_type());
1425         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1426         return new_Proj(irn, mode, pn_Builtin_1_result);
1427 }
1428
1429 /**
1430  * Dereference an address.
1431  *
1432  * @param dbgi  debug info
1433  * @param type  the type of the dereferenced result (the points_to type)
1434  * @param addr  the address to dereference
1435  */
1436 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1437                                       ir_node *const addr)
1438 {
1439         ir_type *irtype = get_ir_type(type);
1440         if (is_compound_type(irtype)
1441                         || is_Method_type(irtype)
1442                         || is_Array_type(irtype)) {
1443                 return addr;
1444         }
1445
1446         ir_cons_flags  flags    = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1447                                   ? cons_volatile : cons_none;
1448         ir_mode *const mode     = get_type_mode(irtype);
1449         ir_node *const memory   = get_store();
1450         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode, flags);
1451         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1452         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
1453
1454         set_store(load_mem);
1455
1456         ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1457         return create_conv(dbgi, load_res, mode_arithmetic);
1458 }
1459
1460 /**
1461  * Creates a strict Conv (to the node's mode) if necessary.
1462  *
1463  * @param dbgi  debug info
1464  * @param node  the node to strict conv
1465  */
1466 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1467 {
1468         ir_mode *mode = get_irn_mode(node);
1469
1470         if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1471                 return node;
1472         if (!mode_is_float(mode))
1473                 return node;
1474
1475         /* check if there is already a Conv */
1476         if (is_Conv(node)) {
1477                 /* convert it into a strict Conv */
1478                 set_Conv_strict(node, 1);
1479                 return node;
1480         }
1481
1482         /* otherwise create a new one */
1483         return new_d_strictConv(dbgi, node, mode);
1484 }
1485
1486 /**
1487  * Returns the address of a global variable.
1488  *
1489  * @param dbgi      debug info
1490  * @param variable  the variable
1491  */
1492 static ir_node *get_global_var_address(dbg_info *const dbgi,
1493                                        const variable_t *const variable)
1494 {
1495         ir_entity *const irentity = variable->v.entity;
1496         if (variable->thread_local) {
1497                 ir_node *const no_mem = new_NoMem();
1498                 ir_node *const tls    = get_irg_tls(current_ir_graph);
1499                 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1500         } else {
1501                 return create_symconst(dbgi, mode_P_data, irentity);
1502         }
1503 }
1504
1505 /**
1506  * Returns the correct base address depending on whether it is a parameter or a
1507  * normal local variable.
1508  */
1509 static ir_node *get_local_frame(ir_entity *const ent)
1510 {
1511         ir_graph      *const irg   = current_ir_graph;
1512         const ir_type *const owner = get_entity_owner(ent);
1513         if (owner == current_outer_frame || owner == current_outer_value_type) {
1514                 assert(current_static_link != NULL);
1515                 return current_static_link;
1516         } else {
1517                 return get_irg_frame(irg);
1518         }
1519 }
1520
1521 /**
1522  * Keep all memory edges of the given block.
1523  */
1524 static void keep_all_memory(ir_node *block)
1525 {
1526         ir_node *old = get_cur_block();
1527
1528         set_cur_block(block);
1529         keep_alive(get_store());
1530         /* TODO: keep all memory edges from restricted pointers */
1531         set_cur_block(old);
1532 }
1533
1534 static ir_node *reference_expression_enum_value_to_firm(
1535                 const reference_expression_t *ref)
1536 {
1537         entity_t *entity = ref->entity;
1538         type_t   *type   = skip_typeref(entity->enum_value.enum_type);
1539         /* make sure the type is constructed */
1540         (void) get_ir_type(type);
1541
1542         return new_Const(entity->enum_value.tv);
1543 }
1544
1545 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1546 {
1547         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1548         entity_t *entity = ref->entity;
1549         assert(is_declaration(entity));
1550         type_t   *type   = skip_typeref(entity->declaration.type);
1551
1552         /* make sure the type is constructed */
1553         (void) get_ir_type(type);
1554
1555         if (entity->kind == ENTITY_FUNCTION && entity->function.btk != bk_none) {
1556                 ir_entity *irentity = get_function_entity(entity, NULL);
1557                 /* for gcc compatibility we have to produce (dummy) addresses for some
1558                  * builtins which don't have entities */
1559                 if (irentity == NULL) {
1560                         if (warning.other) {
1561                                 warningf(&ref->base.source_position,
1562                                                 "taking address of builtin '%Y'",
1563                                                 ref->entity->base.symbol);
1564                         }
1565
1566                         /* simply create a NULL pointer */
1567                         ir_mode  *mode = get_ir_mode_arithmetic(type_void_ptr);
1568                         ir_node  *res  = new_Const_long(mode, 0);
1569
1570                         return res;
1571                 }
1572         }
1573
1574         switch ((declaration_kind_t) entity->declaration.kind) {
1575         case DECLARATION_KIND_UNKNOWN:
1576                 break;
1577
1578         case DECLARATION_KIND_LOCAL_VARIABLE: {
1579                 ir_mode *const mode  = get_ir_mode_storage(type);
1580                 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1581                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1582         }
1583         case DECLARATION_KIND_PARAMETER: {
1584                 ir_mode *const mode  = get_ir_mode_storage(type);
1585                 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1586                 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1587         }
1588         case DECLARATION_KIND_FUNCTION: {
1589                 ir_mode *const mode = get_ir_mode_storage(type);
1590                 return create_symconst(dbgi, mode, entity->function.irentity);
1591         }
1592         case DECLARATION_KIND_INNER_FUNCTION: {
1593                 ir_mode *const mode = get_ir_mode_storage(type);
1594                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1595                         /* inner function not using the closure */
1596                         return create_symconst(dbgi, mode, entity->function.irentity);
1597                 } else {
1598                         /* need trampoline here */
1599                         return create_trampoline(dbgi, mode, entity->function.irentity);
1600                 }
1601         }
1602         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1603                 const variable_t *variable = &entity->variable;
1604                 ir_node *const addr = get_global_var_address(dbgi, variable);
1605                 return deref_address(dbgi, variable->base.type, addr);
1606         }
1607
1608         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1609                 ir_entity *irentity = entity->variable.v.entity;
1610                 ir_node   *frame    = get_local_frame(irentity);
1611                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1612                 return deref_address(dbgi, entity->declaration.type, sel);
1613         }
1614         case DECLARATION_KIND_PARAMETER_ENTITY: {
1615                 ir_entity *irentity = entity->parameter.v.entity;
1616                 ir_node   *frame    = get_local_frame(irentity);
1617                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1618                 return deref_address(dbgi, entity->declaration.type, sel);
1619         }
1620
1621         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1622                 return entity->variable.v.vla_base;
1623
1624         case DECLARATION_KIND_COMPOUND_MEMBER:
1625                 panic("not implemented reference type");
1626         }
1627
1628         panic("reference to declaration with unknown type found");
1629 }
1630
1631 static ir_node *reference_addr(const reference_expression_t *ref)
1632 {
1633         dbg_info *dbgi   = get_dbg_info(&ref->base.source_position);
1634         entity_t *entity = ref->entity;
1635         assert(is_declaration(entity));
1636
1637         switch((declaration_kind_t) entity->declaration.kind) {
1638         case DECLARATION_KIND_UNKNOWN:
1639                 break;
1640         case DECLARATION_KIND_PARAMETER:
1641         case DECLARATION_KIND_LOCAL_VARIABLE:
1642                 /* you can store to a local variable (so we don't panic but return NULL
1643                  * as an indicator for no real address) */
1644                 return NULL;
1645         case DECLARATION_KIND_GLOBAL_VARIABLE: {
1646                 ir_node *const addr = get_global_var_address(dbgi, &entity->variable);
1647                 return addr;
1648         }
1649         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1650                 ir_entity *irentity = entity->variable.v.entity;
1651                 ir_node   *frame    = get_local_frame(irentity);
1652                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1653
1654                 return sel;
1655         }
1656         case DECLARATION_KIND_PARAMETER_ENTITY: {
1657                 ir_entity *irentity = entity->parameter.v.entity;
1658                 ir_node   *frame    = get_local_frame(irentity);
1659                 ir_node   *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1660
1661                 return sel;
1662         }
1663
1664         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1665                 return entity->variable.v.vla_base;
1666
1667         case DECLARATION_KIND_FUNCTION: {
1668                 type_t  *const type = skip_typeref(entity->declaration.type);
1669                 ir_mode *const mode = get_ir_mode_storage(type);
1670                 return create_symconst(dbgi, mode, entity->function.irentity);
1671         }
1672
1673         case DECLARATION_KIND_INNER_FUNCTION: {
1674                 type_t  *const type = skip_typeref(entity->declaration.type);
1675                 ir_mode *const mode = get_ir_mode_storage(type);
1676                 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1677                         /* inner function not using the closure */
1678                         return create_symconst(dbgi, mode, entity->function.irentity);
1679                 } else {
1680                         /* need trampoline here */
1681                         return create_trampoline(dbgi, mode, entity->function.irentity);
1682                 }
1683         }
1684
1685         case DECLARATION_KIND_COMPOUND_MEMBER:
1686                 panic("not implemented reference type");
1687         }
1688
1689         panic("reference to declaration with unknown type found");
1690 }
1691
1692 /**
1693  * Generate an unary builtin.
1694  *
1695  * @param kind           the builtin kind to generate
1696  * @param op             the operand
1697  * @param function_type  the function type for the GNU builtin routine
1698  * @param db             debug info
1699  */
1700 static ir_node *gen_unary_builtin(ir_builtin_kind kind, expression_t *op, type_t *function_type, dbg_info *db)
1701 {
1702         ir_node *in[1];
1703         in[0] = expression_to_firm(op);
1704
1705         ir_type *tp  = get_ir_type(function_type);
1706         ir_type *res = get_method_res_type(tp, 0);
1707         ir_node *irn = new_d_Builtin(db, get_irg_no_mem(current_ir_graph), 1, in, kind, tp);
1708         set_irn_pinned(irn, op_pin_state_floats);
1709         return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1710 }
1711
1712 /**
1713  * Generate a pinned unary builtin.
1714  *
1715  * @param kind           the builtin kind to generate
1716  * @param op             the operand
1717  * @param function_type  the function type for the GNU builtin routine
1718  * @param db             debug info
1719  */
1720 static ir_node *gen_unary_builtin_pinned(ir_builtin_kind kind, expression_t *op,
1721                                          type_t *function_type, dbg_info *db)
1722 {
1723         ir_node *in[1];
1724         in[0] = expression_to_firm(op);
1725
1726         ir_type *tp  = get_ir_type(function_type);
1727         ir_type *res = get_method_res_type(tp, 0);
1728         ir_node *mem = get_store();
1729         ir_node *irn = new_d_Builtin(db, mem, 1, in, kind, tp);
1730         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1731         return new_Proj(irn, get_type_mode(res), pn_Builtin_1_result);
1732 }
1733
1734 /**
1735  * Generate an binary-void-return builtin.
1736  *
1737  * @param kind           the builtin kind to generate
1738  * @param op1            the first operand
1739  * @param op2            the second operand
1740  * @param function_type  the function type for the GNU builtin routine
1741  * @param db             debug info
1742  */
1743 static ir_node *gen_binary_builtin_mem(ir_builtin_kind kind, expression_t *op1,
1744                                        expression_t *op2, type_t *function_type,
1745                                                                            dbg_info *db)
1746 {
1747         ir_node *in[2];
1748         in[0] = expression_to_firm(op1);
1749         in[1] = expression_to_firm(op2);
1750
1751         ir_type *tp  = get_ir_type(function_type);
1752         ir_node *mem = get_store();
1753         ir_node *irn = new_d_Builtin(db, mem, 2, in, kind, tp);
1754         set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1755         return NULL;
1756 }
1757
1758 /**
1759  * Transform calls to builtin functions.
1760  */
1761 static ir_node *process_builtin_call(const call_expression_t *call)
1762 {
1763         dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1764
1765         assert(call->function->kind == EXPR_REFERENCE);
1766         reference_expression_t *builtin = &call->function->reference;
1767
1768         type_t *type = skip_typeref(builtin->base.type);
1769         assert(is_type_pointer(type));
1770
1771         type_t *function_type = skip_typeref(type->pointer.points_to);
1772
1773         switch (builtin->entity->function.btk) {
1774         case bk_gnu_builtin_alloca: {
1775                 if (call->arguments == NULL || call->arguments->next != NULL) {
1776                         panic("invalid number of parameters on __builtin_alloca");
1777                 }
1778                 expression_t *argument = call->arguments->expression;
1779                 ir_node      *size     = expression_to_firm(argument);
1780
1781                 ir_node *store  = get_store();
1782                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1783                                               stack_alloc);
1784                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1785                 set_store(proj_m);
1786                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1787
1788                 return res;
1789         }
1790
1791         case bk_gnu_builtin_huge_val:
1792         case bk_gnu_builtin_huge_valf:
1793         case bk_gnu_builtin_huge_vall:
1794         case bk_gnu_builtin_inf:
1795         case bk_gnu_builtin_inff:
1796         case bk_gnu_builtin_infl: {
1797                 type_t    *type = function_type->function.return_type;
1798                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1799                 ir_tarval *tv   = get_mode_infinite(mode);
1800                 ir_node   *res  = new_d_Const(dbgi, tv);
1801                 return res;
1802         }
1803         case bk_gnu_builtin_nan:
1804         case bk_gnu_builtin_nanf:
1805         case bk_gnu_builtin_nanl: {
1806                 /* Ignore string for now... */
1807                 assert(is_type_function(function_type));
1808                 type_t    *type = function_type->function.return_type;
1809                 ir_mode   *mode = get_ir_mode_arithmetic(type);
1810                 ir_tarval *tv   = get_mode_NAN(mode);
1811                 ir_node   *res  = new_d_Const(dbgi, tv);
1812                 return res;
1813         }
1814         case bk_gnu_builtin_expect: {
1815                 expression_t *argument = call->arguments->expression;
1816                 return _expression_to_firm(argument);
1817         }
1818         case bk_gnu_builtin_va_end:
1819                 /* evaluate the argument of va_end for its side effects */
1820                 _expression_to_firm(call->arguments->expression);
1821                 return NULL;
1822         case bk_gnu_builtin_frame_address: {
1823                 expression_t *const expression = call->arguments->expression;
1824                 bool val = fold_constant_to_bool(expression);
1825                 if (!val) {
1826                         /* the nice case */
1827                         return get_irg_frame(current_ir_graph);
1828                 } else {
1829                         /* get the argument */
1830                         ir_node *in[2];
1831
1832                         in[0] = expression_to_firm(expression);
1833                         in[1] = get_irg_frame(current_ir_graph);
1834                         ir_type *tp  = get_ir_type(function_type);
1835                         ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_frame_address, tp);
1836                         return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1837                 }
1838         }
1839         case bk_gnu_builtin_return_address: {
1840                 expression_t *const expression = call->arguments->expression;
1841                 ir_node *in[2];
1842
1843                 in[0] = expression_to_firm(expression);
1844                 in[1] = get_irg_frame(current_ir_graph);
1845                 ir_type *tp  = get_ir_type(function_type);
1846                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_return_address, tp);
1847                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1848         }
1849         case bk_gnu_builtin_ffs:
1850                  return gen_unary_builtin(ir_bk_ffs,      call->arguments->expression, function_type, dbgi);
1851         case bk_gnu_builtin_clz:
1852                  return gen_unary_builtin(ir_bk_clz,      call->arguments->expression, function_type, dbgi);
1853         case bk_gnu_builtin_ctz:
1854                  return gen_unary_builtin(ir_bk_ctz,      call->arguments->expression, function_type, dbgi);
1855         case bk_gnu_builtin_popcount:
1856         case bk_ms__popcount:
1857                  return gen_unary_builtin(ir_bk_popcount, call->arguments->expression, function_type, dbgi);
1858         case bk_gnu_builtin_parity:
1859                  return gen_unary_builtin(ir_bk_parity,   call->arguments->expression, function_type, dbgi);
1860         case bk_gnu_builtin_prefetch: {
1861                 call_argument_t *const args = call->arguments;
1862                 expression_t *const addr    = args->expression;
1863                 ir_node *in[3];
1864
1865                 in[0] = _expression_to_firm(addr);
1866                 if (args->next != NULL) {
1867                         expression_t *const rw = args->next->expression;
1868
1869                         in[1] = _expression_to_firm(rw);
1870
1871                         if (args->next->next != NULL) {
1872                                 expression_t *const locality = args->next->next->expression;
1873
1874                                 in[2] = expression_to_firm(locality);
1875                         } else {
1876                                 in[2] = new_Const_long(mode_int, 3);
1877                         }
1878                 } else {
1879                         in[1] = new_Const_long(mode_int, 0);
1880                         in[2] = new_Const_long(mode_int, 3);
1881                 }
1882                 ir_type *tp  = get_ir_type(function_type);
1883                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 3, in, ir_bk_prefetch, tp);
1884                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1885                 return NULL;
1886         }
1887         case bk_gnu_builtin_object_size: {
1888                 /* determine value of "type" */
1889                 expression_t *type_expression = call->arguments->next->expression;
1890                 long          type_val        = fold_constant_to_int(type_expression);
1891                 type_t       *type            = function_type->function.return_type;
1892                 ir_mode      *mode            = get_ir_mode_arithmetic(type);
1893                 ir_tarval    *result;
1894
1895                 /* just produce a "I don't know" result */
1896                 if (type_val & 2)
1897                         result = new_tarval_from_long(0, mode);
1898                 else
1899                         result = new_tarval_from_long(-1, mode);
1900
1901                 return new_d_Const(dbgi, result);
1902         }
1903         case bk_gnu_builtin_trap:
1904         case bk_ms__ud2:
1905         {
1906                 ir_type *tp  = get_ir_type(function_type);
1907                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 0, NULL, ir_bk_trap, tp);
1908                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1909                 return NULL;
1910         }
1911         case bk_ms__debugbreak: {
1912                 ir_type *tp  = get_ir_type(function_type);
1913                 ir_node *irn = new_d_Builtin(dbgi, get_store(), 0, NULL, ir_bk_debugbreak, tp);
1914                 set_store(new_Proj(irn, mode_M, pn_Builtin_M));
1915                 return NULL;
1916         }
1917         case bk_ms_ReturnAddress: {
1918                 ir_node *in[2];
1919
1920                 in[0] = new_Const_long(mode_int, 0);
1921                 in[1] = get_irg_frame(current_ir_graph);
1922                 ir_type *tp  = get_ir_type(function_type);
1923                 ir_node *irn = new_d_Builtin(dbgi, get_irg_no_mem(current_ir_graph), 2, in, ir_bk_return_address, tp);
1924                 return new_Proj(irn, mode_P_data, pn_Builtin_1_result);
1925         }
1926         case bk_ms_rotl:
1927         case bk_ms_rotl64: {
1928                 ir_node *val  = expression_to_firm(call->arguments->expression);
1929                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1930                 ir_mode *mode = get_irn_mode(val);
1931                 return new_d_Rotl(dbgi, val, create_conv(dbgi, shf, mode_uint), mode);
1932         }
1933         case bk_ms_rotr:
1934         case bk_ms_rotr64: {
1935                 ir_node *val  = expression_to_firm(call->arguments->expression);
1936                 ir_node *shf  = expression_to_firm(call->arguments->next->expression);
1937                 ir_mode *mode = get_irn_mode(val);
1938                 ir_node *c    = new_Const_long(mode_uint, get_mode_size_bits(mode));
1939                 ir_node *sub  = new_d_Sub(dbgi, c, create_conv(dbgi, shf, mode_uint), mode_uint);
1940                 return new_d_Rotl(dbgi, val, sub, mode);
1941         }
1942         case bk_ms_byteswap_ushort:
1943         case bk_ms_byteswap_ulong:
1944         case bk_ms_byteswap_uint64:
1945                 return gen_unary_builtin(ir_bk_bswap, call->arguments->expression, function_type, dbgi);
1946         case bk_ms__inbyte:
1947         case bk_ms__inword:
1948         case bk_ms__indword:
1949                 return gen_unary_builtin_pinned(ir_bk_inport, call->arguments->expression, function_type, dbgi);
1950         case bk_ms__outbyte:
1951         case bk_ms__outword:
1952         case bk_ms__outdword:
1953                 return gen_binary_builtin_mem(ir_bk_outport, call->arguments->expression,
1954                         call->arguments->next->expression, function_type, dbgi);
1955         default:
1956                 panic("unsupported builtin found");
1957         }
1958 }
1959
1960 /**
1961  * Transform a call expression.
1962  * Handles some special cases, like alloca() calls, which must be resolved
1963  * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1964  * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1965  * handled right...
1966  */
1967 static ir_node *call_expression_to_firm(const call_expression_t *const call)
1968 {
1969         dbg_info *const dbgi = get_dbg_info(&call->base.source_position);
1970         assert(get_cur_block() != NULL);
1971
1972         expression_t *function = call->function;
1973         if (function->kind == EXPR_REFERENCE) {
1974                 const reference_expression_t *ref    = &function->reference;
1975                 entity_t                     *entity = ref->entity;
1976
1977                 if (entity->kind == ENTITY_FUNCTION) {
1978                         ir_entity *irentity = entity->function.irentity;
1979                         if (irentity == NULL)
1980                                 irentity = get_function_entity(entity, NULL);
1981
1982                         if (irentity == NULL && entity->function.btk != bk_none) {
1983                                 return process_builtin_call(call);
1984                         }
1985
1986 #if 0
1987                         if (irentity == rts_entities[rts_alloca]) {
1988                                 /* handle alloca() call */
1989                                 expression_t *argument = call->arguments->expression;
1990                                 ir_node      *size     = expression_to_firm(argument);
1991                                 ir_mode      *mode     = get_ir_mode_arithmetic(type_size_t);
1992
1993                                 size = create_conv(dbgi, size, mode);
1994
1995                                 ir_node  *store  = get_store();
1996                                 ir_node  *alloca = new_d_Alloc(dbgi, store, size,
1997                                                                firm_unknown_type, stack_alloc);
1998                                 ir_node  *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1999                                 set_store(proj_m);
2000                                 ir_node  *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
2001
2002                                 return res;
2003                         }
2004 #endif
2005                 }
2006         }
2007         ir_node *callee = expression_to_firm(function);
2008
2009         type_t *type = skip_typeref(function->base.type);
2010         assert(is_type_pointer(type));
2011         pointer_type_t *pointer_type = &type->pointer;
2012         type_t         *points_to    = skip_typeref(pointer_type->points_to);
2013         assert(is_type_function(points_to));
2014         function_type_t *function_type = &points_to->function;
2015
2016         int      n_parameters = 0;
2017         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
2018         ir_type *new_method_type = NULL;
2019         if (function_type->variadic || function_type->unspecified_parameters) {
2020                 const call_argument_t *argument = call->arguments;
2021                 for ( ; argument != NULL; argument = argument->next) {
2022                         ++n_parameters;
2023                 }
2024
2025                 /* we need to construct a new method type matching the call
2026                  * arguments... */
2027                 type_dbg_info *tdbgi = get_type_dbg_info_((const type_t*) function_type);
2028                 int n_res       = get_method_n_ress(ir_method_type);
2029                 new_method_type = new_d_type_method(n_parameters, n_res, tdbgi);
2030                 set_method_calling_convention(new_method_type,
2031                                get_method_calling_convention(ir_method_type));
2032                 set_method_additional_properties(new_method_type,
2033                                get_method_additional_properties(ir_method_type));
2034                 set_method_variadicity(new_method_type,
2035                                        get_method_variadicity(ir_method_type));
2036
2037                 for (int i = 0; i < n_res; ++i) {
2038                         set_method_res_type(new_method_type, i,
2039                                             get_method_res_type(ir_method_type, i));
2040                 }
2041                 argument = call->arguments;
2042                 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
2043                         expression_t *expression = argument->expression;
2044                         ir_type      *irtype     = get_ir_type(expression->base.type);
2045                         set_method_param_type(new_method_type, i, irtype);
2046                 }
2047                 ir_method_type = new_method_type;
2048         } else {
2049                 n_parameters = get_method_n_params(ir_method_type);
2050         }
2051
2052         ir_node *in[n_parameters];
2053
2054         const call_argument_t *argument = call->arguments;
2055         for (int n = 0; n < n_parameters; ++n) {
2056                 expression_t *expression = argument->expression;
2057                 ir_node      *arg_node   = expression_to_firm(expression);
2058
2059                 type_t  *type = skip_typeref(expression->base.type);
2060                 if (!is_type_compound(type)) {
2061                         ir_mode *mode = get_ir_mode_storage(expression->base.type);
2062                         arg_node      = create_conv(dbgi, arg_node, mode);
2063                         arg_node      = do_strict_conv(dbgi, arg_node);
2064                 }
2065
2066                 in[n] = arg_node;
2067
2068                 argument = argument->next;
2069         }
2070
2071         ir_node  *store = get_store();
2072         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
2073                                      ir_method_type);
2074         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M);
2075         set_store(mem);
2076
2077         type_t  *return_type = skip_typeref(function_type->return_type);
2078         ir_node *result      = NULL;
2079
2080         if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
2081                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
2082
2083                 if (is_type_scalar(return_type)) {
2084                         ir_mode *mode       = get_ir_mode_storage(return_type);
2085                         result              = new_d_Proj(dbgi, resproj, mode, 0);
2086                         ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
2087                         result              = create_conv(NULL, result, mode_arith);
2088                 } else {
2089                         ir_mode *mode = mode_P_data;
2090                         result        = new_d_Proj(dbgi, resproj, mode, 0);
2091                 }
2092         }
2093
2094         if (function->kind == EXPR_REFERENCE &&
2095             function->reference.entity->declaration.modifiers & DM_NORETURN) {
2096                 /* A dead end:  Keep the Call and the Block.  Also place all further
2097                  * nodes into a new and unreachable block. */
2098                 keep_alive(node);
2099                 keep_alive(get_cur_block());
2100                 ir_node *block = new_Block(0, NULL);
2101                 set_cur_block(block);
2102         }
2103
2104         return result;
2105 }
2106
2107 static void statement_to_firm(statement_t *statement);
2108 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
2109
2110 static ir_node *expression_to_addr(const expression_t *expression);
2111 static ir_node *create_condition_evaluation(const expression_t *expression,
2112                                             ir_node *true_block,
2113                                             ir_node *false_block);
2114
2115 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
2116                          ir_node *value)
2117 {
2118         if (!is_type_compound(type)) {
2119                 ir_mode *mode = get_ir_mode_storage(type);
2120                 value         = create_conv(dbgi, value, mode);
2121                 value         = do_strict_conv(dbgi, value);
2122         }
2123
2124         ir_node *memory = get_store();
2125
2126         if (is_type_scalar(type)) {
2127                 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
2128                                       ? cons_volatile : cons_none;
2129                 ir_node  *store     = new_d_Store(dbgi, memory, addr, value, flags);
2130                 ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2131                 set_store(store_mem);
2132         } else {
2133                 ir_type *irtype    = get_ir_type(type);
2134                 ir_node *copyb     = new_d_CopyB(dbgi, memory, addr, value, irtype);
2135                 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
2136                 set_store(copyb_mem);
2137         }
2138 }
2139
2140 static ir_tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
2141 {
2142         ir_tarval *all_one   = get_mode_all_one(mode);
2143         int        mode_size = get_mode_size_bits(mode);
2144
2145         assert(offset >= 0);
2146         assert(size   >= 0);
2147         assert(offset + size <= mode_size);
2148         if (size == mode_size) {
2149                 return all_one;
2150         }
2151
2152         long       shiftr    = get_mode_size_bits(mode) - size;
2153         long       shiftl    = offset;
2154         ir_tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
2155         ir_tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
2156         ir_tarval *mask0     = tarval_shr(all_one, tv_shiftr);
2157         ir_tarval *mask1     = tarval_shl(mask0, tv_shiftl);
2158
2159         return mask1;
2160 }
2161
2162 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
2163                 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
2164 {
2165         ir_type *entity_type = get_entity_type(entity);
2166         ir_type *base_type   = get_primitive_base_type(entity_type);
2167         assert(base_type != NULL);
2168         ir_mode *mode        = get_type_mode(base_type);
2169
2170         value = create_conv(dbgi, value, mode);
2171
2172         /* kill upper bits of value and shift to right position */
2173         int      bitoffset    = get_entity_offset_bits_remainder(entity);
2174         int      bitsize      = get_mode_size_bits(get_type_mode(entity_type));
2175
2176         ir_tarval *mask            = create_bitfield_mask(mode, 0, bitsize);
2177         ir_node   *mask_node       = new_d_Const(dbgi, mask);
2178         ir_node   *value_masked    = new_d_And(dbgi, value, mask_node, mode);
2179         ir_tarval *shiftl          = new_tarval_from_long(bitoffset, mode_uint);
2180         ir_node   *shiftcount      = new_d_Const(dbgi, shiftl);
2181         ir_node   *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
2182
2183         /* load current value */
2184         ir_node   *mem             = get_store();
2185         ir_node   *load            = new_d_Load(dbgi, mem, addr, mode,
2186                                           set_volatile ? cons_volatile : cons_none);
2187         ir_node   *load_mem        = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2188         ir_node   *load_res        = new_d_Proj(dbgi, load, mode, pn_Load_res);
2189         ir_tarval *shift_mask      = create_bitfield_mask(mode, bitoffset, bitsize);
2190         ir_tarval *inv_mask        = tarval_not(shift_mask);
2191         ir_node   *inv_mask_node   = new_d_Const(dbgi, inv_mask);
2192         ir_node   *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
2193
2194         /* construct new value and store */
2195         ir_node *new_val   = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
2196         ir_node *store     = new_d_Store(dbgi, load_mem, addr, new_val,
2197                                          set_volatile ? cons_volatile : cons_none);
2198         ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2199         set_store(store_mem);
2200
2201         return value_masked;
2202 }
2203
2204 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
2205                 ir_node *addr)
2206 {
2207         dbg_info *dbgi     = get_dbg_info(&expression->base.source_position);
2208         type_t   *type     = expression->base.type;
2209         ir_mode  *mode     = get_ir_mode_storage(type);
2210         ir_node  *mem      = get_store();
2211         ir_node  *load     = new_d_Load(dbgi, mem, addr, mode, cons_none);
2212         ir_node  *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
2213         ir_node  *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
2214
2215         load_res           = create_conv(dbgi, load_res, mode_int);
2216
2217         set_store(load_mem);
2218
2219         /* kill upper bits */
2220         assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
2221         ir_entity *entity       = expression->compound_entry->compound_member.entity;
2222         int        bitoffset    = get_entity_offset_bits_remainder(entity);
2223         ir_type   *entity_type  = get_entity_type(entity);
2224         int        bitsize      = get_mode_size_bits(get_type_mode(entity_type));
2225         long       shift_bitsl  = machine_size - bitoffset - bitsize;
2226         assert(shift_bitsl >= 0);
2227         ir_tarval *tvl          = new_tarval_from_long(shift_bitsl, mode_uint);
2228         ir_node   *countl       = new_d_Const(dbgi, tvl);
2229         ir_node   *shiftl       = new_d_Shl(dbgi, load_res, countl, mode_int);
2230
2231         long       shift_bitsr  = bitoffset + shift_bitsl;
2232         assert(shift_bitsr <= (long) machine_size);
2233         ir_tarval *tvr          = new_tarval_from_long(shift_bitsr, mode_uint);
2234         ir_node   *countr       = new_d_Const(dbgi, tvr);
2235         ir_node   *shiftr;
2236         if (mode_is_signed(mode)) {
2237                 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
2238         } else {
2239                 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
2240         }
2241
2242         return create_conv(dbgi, shiftr, mode);
2243 }
2244
2245 /* make sure the selected compound type is constructed */
2246 static void construct_select_compound(const select_expression_t *expression)
2247 {
2248         type_t *type = skip_typeref(expression->compound->base.type);
2249         if (is_type_pointer(type)) {
2250                 type = type->pointer.points_to;
2251         }
2252         (void) get_ir_type(type);
2253 }
2254
2255 static ir_node *set_value_for_expression_addr(const expression_t *expression,
2256                                               ir_node *value, ir_node *addr)
2257 {
2258         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2259         type_t   *type = skip_typeref(expression->base.type);
2260
2261         if (!is_type_compound(type)) {
2262                 ir_mode  *mode = get_ir_mode_storage(type);
2263                 value          = create_conv(dbgi, value, mode);
2264                 value          = do_strict_conv(dbgi, value);
2265         }
2266
2267         if (expression->kind == EXPR_REFERENCE) {
2268                 const reference_expression_t *ref = &expression->reference;
2269
2270                 entity_t *entity = ref->entity;
2271                 assert(is_declaration(entity));
2272                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2273                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2274                         set_value(entity->variable.v.value_number, value);
2275                         return value;
2276                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2277                         set_value(entity->parameter.v.value_number, value);
2278                         return value;
2279                 }
2280         }
2281
2282         if (addr == NULL)
2283                 addr = expression_to_addr(expression);
2284         assert(addr != NULL);
2285
2286         if (expression->kind == EXPR_SELECT) {
2287                 const select_expression_t *select = &expression->select;
2288
2289                 construct_select_compound(select);
2290
2291                 entity_t *entity = select->compound_entry;
2292                 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
2293                 if (entity->declaration.type->kind == TYPE_BITFIELD) {
2294                         ir_entity *irentity = entity->compound_member.entity;
2295                         bool       set_volatile
2296                                 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
2297                         value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2298                                                        set_volatile);
2299                         return value;
2300                 }
2301         }
2302
2303         assign_value(dbgi, addr, type, value);
2304         return value;
2305 }
2306
2307 static void set_value_for_expression(const expression_t *expression,
2308                                      ir_node *value)
2309 {
2310         set_value_for_expression_addr(expression, value, NULL);
2311 }
2312
2313 static ir_node *get_value_from_lvalue(const expression_t *expression,
2314                                       ir_node *addr)
2315 {
2316         if (expression->kind == EXPR_REFERENCE) {
2317                 const reference_expression_t *ref = &expression->reference;
2318
2319                 entity_t *entity = ref->entity;
2320                 assert(entity->kind == ENTITY_VARIABLE
2321                                 || entity->kind == ENTITY_PARAMETER);
2322                 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2323                 int value_number;
2324                 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2325                         value_number = entity->variable.v.value_number;
2326                         assert(addr == NULL);
2327                         type_t  *type = skip_typeref(expression->base.type);
2328                         ir_mode *mode = get_ir_mode_storage(type);
2329                         ir_node *res  = get_value(value_number, mode);
2330                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2331                 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2332                         value_number = entity->parameter.v.value_number;
2333                         assert(addr == NULL);
2334                         type_t  *type = skip_typeref(expression->base.type);
2335                         ir_mode *mode = get_ir_mode_storage(type);
2336                         ir_node *res  = get_value(value_number, mode);
2337                         return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2338                 }
2339         }
2340
2341         assert(addr != NULL);
2342         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2343
2344         ir_node *value;
2345         if (expression->kind == EXPR_SELECT &&
2346             expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2347             construct_select_compound(&expression->select);
2348                 value = bitfield_extract_to_firm(&expression->select, addr);
2349         } else {
2350                 value = deref_address(dbgi, expression->base.type, addr);
2351         }
2352
2353         return value;
2354 }
2355
2356
2357 static ir_node *create_incdec(const unary_expression_t *expression)
2358 {
2359         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2360         const expression_t *value_expr = expression->value;
2361         ir_node            *addr       = expression_to_addr(value_expr);
2362         ir_node            *value      = get_value_from_lvalue(value_expr, addr);
2363
2364         type_t  *type = skip_typeref(expression->base.type);
2365         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2366
2367         ir_node *offset;
2368         if (is_type_pointer(type)) {
2369                 pointer_type_t *pointer_type = &type->pointer;
2370                 offset = get_type_size_node(pointer_type->points_to);
2371         } else {
2372                 assert(is_type_arithmetic(type));
2373                 offset = new_Const(get_mode_one(mode));
2374         }
2375
2376         ir_node *result;
2377         ir_node *store_value;
2378         switch(expression->base.kind) {
2379         case EXPR_UNARY_POSTFIX_INCREMENT:
2380                 result      = value;
2381                 store_value = new_d_Add(dbgi, value, offset, mode);
2382                 break;
2383         case EXPR_UNARY_POSTFIX_DECREMENT:
2384                 result      = value;
2385                 store_value = new_d_Sub(dbgi, value, offset, mode);
2386                 break;
2387         case EXPR_UNARY_PREFIX_INCREMENT:
2388                 result      = new_d_Add(dbgi, value, offset, mode);
2389                 store_value = result;
2390                 break;
2391         case EXPR_UNARY_PREFIX_DECREMENT:
2392                 result      = new_d_Sub(dbgi, value, offset, mode);
2393                 store_value = result;
2394                 break;
2395         default:
2396                 panic("no incdec expr in create_incdec");
2397         }
2398
2399         set_value_for_expression_addr(value_expr, store_value, addr);
2400
2401         return result;
2402 }
2403
2404 static bool is_local_variable(expression_t *expression)
2405 {
2406         if (expression->kind != EXPR_REFERENCE)
2407                 return false;
2408         reference_expression_t *ref_expr = &expression->reference;
2409         entity_t               *entity   = ref_expr->entity;
2410         if (entity->kind != ENTITY_VARIABLE)
2411                 return false;
2412         assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2413         return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2414 }
2415
2416 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2417 {
2418         switch(kind) {
2419         case EXPR_BINARY_EQUAL:         return pn_Cmp_Eq;
2420         case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2421         case EXPR_BINARY_NOTEQUAL:
2422                 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2423         case EXPR_BINARY_ISLESS:
2424         case EXPR_BINARY_LESS:          return pn_Cmp_Lt;
2425         case EXPR_BINARY_ISLESSEQUAL:
2426         case EXPR_BINARY_LESSEQUAL:     return pn_Cmp_Le;
2427         case EXPR_BINARY_ISGREATER:
2428         case EXPR_BINARY_GREATER:       return pn_Cmp_Gt;
2429         case EXPR_BINARY_ISGREATEREQUAL:
2430         case EXPR_BINARY_GREATEREQUAL:  return pn_Cmp_Ge;
2431         case EXPR_BINARY_ISUNORDERED:   return pn_Cmp_Uo;
2432
2433         default:
2434                 break;
2435         }
2436         panic("trying to get pn_Cmp from non-comparison binexpr type");
2437 }
2438
2439 /**
2440  * Handle the assume optimizer hint: check if a Confirm
2441  * node can be created.
2442  *
2443  * @param dbi    debug info
2444  * @param expr   the IL assume expression
2445  *
2446  * we support here only some simple cases:
2447  *  - var rel const
2448  *  - const rel val
2449  *  - var rel var
2450  */
2451 static ir_node *handle_assume_compare(dbg_info *dbi,
2452                                       const binary_expression_t *expression)
2453 {
2454         expression_t *op1 = expression->left;
2455         expression_t *op2 = expression->right;
2456         entity_t     *var2, *var = NULL;
2457         ir_node      *res = NULL;
2458         pn_Cmp        cmp_val;
2459
2460         cmp_val = get_pnc(expression->base.kind, op1->base.type);
2461
2462         if (is_local_variable(op1) && is_local_variable(op2)) {
2463                 var  = op1->reference.entity;
2464             var2 = op2->reference.entity;
2465
2466                 type_t  *const type = skip_typeref(var->declaration.type);
2467                 ir_mode *const mode = get_ir_mode_storage(type);
2468
2469                 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2470                 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2471
2472                 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2473                 set_value(var2->variable.v.value_number, res);
2474
2475                 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2476                 set_value(var->variable.v.value_number, res);
2477
2478                 return res;
2479         }
2480
2481         expression_t *con;
2482         if (is_local_variable(op1) && is_constant_expression(op2)) {
2483                 var = op1->reference.entity;
2484                 con = op2;
2485         } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2486                 cmp_val = get_inversed_pnc(cmp_val);
2487                 var = op2->reference.entity;
2488                 con = op1;
2489         }
2490
2491         if (var != NULL) {
2492                 type_t  *const type = skip_typeref(var->declaration.type);
2493                 ir_mode *const mode = get_ir_mode_storage(type);
2494
2495                 res = get_value(var->variable.v.value_number, mode);
2496                 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2497                 set_value(var->variable.v.value_number, res);
2498         }
2499         return res;
2500 }
2501
2502 /**
2503  * Handle the assume optimizer hint.
2504  *
2505  * @param dbi    debug info
2506  * @param expr   the IL assume expression
2507  */
2508 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2509 {
2510         switch(expression->kind) {
2511         case EXPR_BINARY_EQUAL:
2512         case EXPR_BINARY_NOTEQUAL:
2513         case EXPR_BINARY_LESS:
2514         case EXPR_BINARY_LESSEQUAL:
2515         case EXPR_BINARY_GREATER:
2516         case EXPR_BINARY_GREATEREQUAL:
2517                 return handle_assume_compare(dbi, &expression->binary);
2518         default:
2519                 return NULL;
2520         }
2521 }
2522
2523 static ir_node *create_cast(dbg_info *dbgi,     ir_node *value_node,
2524                             type_t *from_type, type_t *type)
2525 {
2526         type = skip_typeref(type);
2527         if (type == type_void) {
2528                 /* make sure firm type is constructed */
2529                 (void) get_ir_type(type);
2530                 return NULL;
2531         }
2532         if (!is_type_scalar(type)) {
2533                 /* make sure firm type is constructed */
2534                 (void) get_ir_type(type);
2535                 return value_node;
2536         }
2537
2538         from_type     = skip_typeref(from_type);
2539         ir_mode *mode = get_ir_mode_storage(type);
2540         /* check for conversion from / to __based types */
2541         if (is_type_pointer(type) && is_type_pointer(from_type)) {
2542                 const variable_t *from_var = from_type->pointer.base_variable;
2543                 const variable_t *to_var   = type->pointer.base_variable;
2544                 if (from_var != to_var) {
2545                         if (from_var != NULL) {
2546                                 ir_node *const addr = get_global_var_address(dbgi, from_var);
2547                                 ir_node *const base = deref_address(dbgi, from_var->base.type, addr);
2548                                 value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(from_type));
2549                         }
2550                         if (to_var != NULL) {
2551                                 ir_node *const addr = get_global_var_address(dbgi, to_var);
2552                                 ir_node *const base = deref_address(dbgi, to_var->base.type, addr);
2553                                 value_node = new_d_Sub(dbgi, value_node, base, mode);
2554                         }
2555                 }
2556         }
2557
2558         if (is_type_atomic(type, ATOMIC_TYPE_BOOL)) {
2559                 /* bool adjustments (we save a mode_Bu, but have to temporarily
2560                  * convert to mode_b so we only get a 0/1 value */
2561                 value_node = create_conv(dbgi, value_node, mode_b);
2562         }
2563
2564         ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2565         ir_node *node       = create_conv(dbgi, value_node, mode);
2566         node                = do_strict_conv(dbgi, node);
2567         node                = create_conv(dbgi, node, mode_arith);
2568
2569         return node;
2570 }
2571
2572 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2573 {
2574         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2575         type_t   *type = skip_typeref(expression->base.type);
2576
2577         if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2578                 return expression_to_addr(expression->value);
2579
2580         const expression_t *value = expression->value;
2581
2582         switch(expression->base.kind) {
2583         case EXPR_UNARY_NEGATE: {
2584                 ir_node *value_node = expression_to_firm(value);
2585                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2586                 return new_d_Minus(dbgi, value_node, mode);
2587         }
2588         case EXPR_UNARY_PLUS:
2589                 return expression_to_firm(value);
2590         case EXPR_UNARY_BITWISE_NEGATE: {
2591                 ir_node *value_node = expression_to_firm(value);
2592                 ir_mode *mode       = get_ir_mode_arithmetic(type);
2593                 return new_d_Not(dbgi, value_node, mode);
2594         }
2595         case EXPR_UNARY_NOT: {
2596                 ir_node *value_node = _expression_to_firm(value);
2597                 value_node          = create_conv(dbgi, value_node, mode_b);
2598                 ir_node *res        = new_d_Not(dbgi, value_node, mode_b);
2599                 return res;
2600         }
2601         case EXPR_UNARY_DEREFERENCE: {
2602                 ir_node *value_node = expression_to_firm(value);
2603                 type_t  *value_type = skip_typeref(value->base.type);
2604                 assert(is_type_pointer(value_type));
2605
2606                 /* check for __based */
2607                 const variable_t *const base_var = value_type->pointer.base_variable;
2608                 if (base_var != NULL) {
2609                         ir_node *const addr = get_global_var_address(dbgi, base_var);
2610                         ir_node *const base = deref_address(dbgi, base_var->base.type, addr);
2611                         value_node = new_d_Add(dbgi, value_node, base, get_ir_mode_storage(value_type));
2612                 }
2613                 type_t  *points_to  = value_type->pointer.points_to;
2614                 return deref_address(dbgi, points_to, value_node);
2615         }
2616         case EXPR_UNARY_POSTFIX_INCREMENT:
2617         case EXPR_UNARY_POSTFIX_DECREMENT:
2618         case EXPR_UNARY_PREFIX_INCREMENT:
2619         case EXPR_UNARY_PREFIX_DECREMENT:
2620                 return create_incdec(expression);
2621         case EXPR_UNARY_CAST_IMPLICIT:
2622         case EXPR_UNARY_CAST: {
2623                 ir_node *value_node = expression_to_firm(value);
2624                 type_t  *from_type  = value->base.type;
2625                 return create_cast(dbgi, value_node, from_type, type);
2626         }
2627         case EXPR_UNARY_ASSUME:
2628                 return handle_assume(dbgi, value);
2629
2630         default:
2631                 break;
2632         }
2633         panic("invalid UNEXPR type found");
2634 }
2635
2636 /**
2637  * produces a 0/1 depending of the value of a mode_b node
2638  */
2639 static ir_node *produce_condition_result(const expression_t *expression,
2640                                          ir_mode *mode, dbg_info *dbgi)
2641 {
2642         ir_node *cur_block = get_cur_block();
2643
2644         ir_node *one_block = new_immBlock();
2645         set_cur_block(one_block);
2646         ir_node *one       = new_Const(get_mode_one(mode));
2647         ir_node *jmp_one   = new_d_Jmp(dbgi);
2648
2649         ir_node *zero_block = new_immBlock();
2650         set_cur_block(zero_block);
2651         ir_node *zero       = new_Const(get_mode_null(mode));
2652         ir_node *jmp_zero   = new_d_Jmp(dbgi);
2653
2654         set_cur_block(cur_block);
2655         create_condition_evaluation(expression, one_block, zero_block);
2656         mature_immBlock(one_block);
2657         mature_immBlock(zero_block);
2658
2659         ir_node *in_cf[2] = { jmp_one, jmp_zero };
2660         ir_node *block = new_Block(2, in_cf);
2661         set_cur_block(block);
2662
2663         ir_node *in[2] = { one, zero };
2664         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
2665
2666         return val;
2667 }
2668
2669 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2670                 ir_node *value, type_t *type)
2671 {
2672         ir_mode        *const mode         = get_ir_mode_arithmetic(type_ptrdiff_t);
2673         assert(is_type_pointer(type));
2674         pointer_type_t *const pointer_type = &type->pointer;
2675         type_t         *const points_to    = skip_typeref(pointer_type->points_to);
2676         ir_node        *      elem_size    = get_type_size_node(points_to);
2677         elem_size                          = create_conv(dbgi, elem_size, mode);
2678         value                              = create_conv(dbgi, value,     mode);
2679         ir_node        *const mul          = new_d_Mul(dbgi, value, elem_size, mode);
2680         return mul;
2681 }
2682
2683 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2684                           ir_node *left, ir_node *right)
2685 {
2686         ir_mode  *mode;
2687         type_t   *type_left  = skip_typeref(expression->left->base.type);
2688         type_t   *type_right = skip_typeref(expression->right->base.type);
2689
2690         expression_kind_t kind = expression->base.kind;
2691
2692         switch (kind) {
2693         case EXPR_BINARY_SHIFTLEFT:
2694         case EXPR_BINARY_SHIFTRIGHT:
2695         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2696         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2697                 mode  = get_irn_mode(left);
2698                 right = create_conv(dbgi, right, mode_uint);
2699                 break;
2700
2701         case EXPR_BINARY_SUB:
2702                 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2703                         const pointer_type_t *const ptr_type = &type_left->pointer;
2704
2705                         mode = get_ir_mode_arithmetic(expression->base.type);
2706                         ir_node *const elem_size = get_type_size_node(ptr_type->points_to);
2707                         ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2708                         ir_node *const sub       = new_d_Sub(dbgi, left, right, mode);
2709                         ir_node *const no_mem    = new_NoMem();
2710                         ir_node *const div       = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2711                                                                                                    mode, op_pin_state_floats);
2712                         return new_d_Proj(dbgi, div, mode, pn_Div_res);
2713                 }
2714                 /* fallthrough */
2715         case EXPR_BINARY_SUB_ASSIGN:
2716                 if (is_type_pointer(type_left)) {
2717                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2718                         mode  = get_ir_mode_arithmetic(type_left);
2719                         break;
2720                 }
2721                 goto normal_node;
2722
2723         case EXPR_BINARY_ADD:
2724         case EXPR_BINARY_ADD_ASSIGN:
2725                 if (is_type_pointer(type_left)) {
2726                         right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2727                         mode  = get_ir_mode_arithmetic(type_left);
2728                         break;
2729                 } else if (is_type_pointer(type_right)) {
2730                         left  = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2731                         mode  = get_ir_mode_arithmetic(type_right);
2732                         break;
2733                 }
2734                 goto normal_node;
2735
2736         default:
2737 normal_node:
2738                 mode = get_ir_mode_arithmetic(type_right);
2739                 left = create_conv(dbgi, left, mode);
2740                 break;
2741         }
2742
2743         switch (kind) {
2744         case EXPR_BINARY_ADD_ASSIGN:
2745         case EXPR_BINARY_ADD:
2746                 return new_d_Add(dbgi, left, right, mode);
2747         case EXPR_BINARY_SUB_ASSIGN:
2748         case EXPR_BINARY_SUB:
2749                 return new_d_Sub(dbgi, left, right, mode);
2750         case EXPR_BINARY_MUL_ASSIGN:
2751         case EXPR_BINARY_MUL:
2752                 return new_d_Mul(dbgi, left, right, mode);
2753         case EXPR_BINARY_BITWISE_AND:
2754         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2755                 return new_d_And(dbgi, left, right, mode);
2756         case EXPR_BINARY_BITWISE_OR:
2757         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2758                 return new_d_Or(dbgi, left, right, mode);
2759         case EXPR_BINARY_BITWISE_XOR:
2760         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2761                 return new_d_Eor(dbgi, left, right, mode);
2762         case EXPR_BINARY_SHIFTLEFT:
2763         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2764                 return new_d_Shl(dbgi, left, right, mode);
2765         case EXPR_BINARY_SHIFTRIGHT:
2766         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2767                 if (mode_is_signed(mode)) {
2768                         return new_d_Shrs(dbgi, left, right, mode);
2769                 } else {
2770                         return new_d_Shr(dbgi, left, right, mode);
2771                 }
2772         case EXPR_BINARY_DIV:
2773         case EXPR_BINARY_DIV_ASSIGN: {
2774                 ir_node *pin = new_Pin(new_NoMem());
2775                 ir_node *op;
2776                 ir_node *res;
2777                 if (mode_is_float(mode)) {
2778                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2779                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2780                 } else {
2781                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2782                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2783                 }
2784                 return res;
2785         }
2786         case EXPR_BINARY_MOD:
2787         case EXPR_BINARY_MOD_ASSIGN: {
2788                 ir_node *pin = new_Pin(new_NoMem());
2789                 assert(!mode_is_float(mode));
2790                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2791                                          op_pin_state_floats);
2792                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2793                 return res;
2794         }
2795         default:
2796                 panic("unexpected expression kind");
2797         }
2798 }
2799
2800 static ir_node *create_lazy_op(const binary_expression_t *expression)
2801 {
2802         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2803         type_t   *type = skip_typeref(expression->base.type);
2804         ir_mode  *mode = get_ir_mode_arithmetic(type);
2805
2806         if (is_constant_expression(expression->left)) {
2807                 bool val = fold_constant_to_bool(expression->left);
2808                 expression_kind_t ekind = expression->base.kind;
2809                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2810                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2811                         if (!val) {
2812                                 return new_Const(get_mode_null(mode));
2813                         }
2814                 } else {
2815                         if (val) {
2816                                 return new_Const(get_mode_one(mode));
2817                         }
2818                 }
2819
2820                 if (is_constant_expression(expression->right)) {
2821                         bool valr = fold_constant_to_bool(expression->right);
2822                         return valr ?
2823                                 new_Const(get_mode_one(mode)) :
2824                                 new_Const(get_mode_null(mode));
2825                 }
2826
2827                 return produce_condition_result(expression->right, mode, dbgi);
2828         }
2829
2830         return produce_condition_result((const expression_t*) expression, mode,
2831                                         dbgi);
2832 }
2833
2834 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2835                                             ir_node *right, ir_mode *mode);
2836
2837 static ir_node *create_assign_binop(const binary_expression_t *expression)
2838 {
2839         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2840         const expression_t *left_expr = expression->left;
2841         type_t             *type      = skip_typeref(left_expr->base.type);
2842         ir_node            *right     = expression_to_firm(expression->right);
2843         ir_node            *left_addr = expression_to_addr(left_expr);
2844         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2845         ir_node            *result    = create_op(dbgi, expression, left, right);
2846
2847         result = create_cast(dbgi, result, expression->right->base.type, type);
2848         result = do_strict_conv(dbgi, result);
2849
2850         result = set_value_for_expression_addr(left_expr, result, left_addr);
2851
2852         if (!is_type_compound(type)) {
2853                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2854                 result = create_conv(dbgi, result, mode_arithmetic);
2855         }
2856         return result;
2857 }
2858
2859 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2860 {
2861         expression_kind_t kind = expression->base.kind;
2862
2863         switch(kind) {
2864         case EXPR_BINARY_EQUAL:
2865         case EXPR_BINARY_NOTEQUAL:
2866         case EXPR_BINARY_LESS:
2867         case EXPR_BINARY_LESSEQUAL:
2868         case EXPR_BINARY_GREATER:
2869         case EXPR_BINARY_GREATEREQUAL:
2870         case EXPR_BINARY_ISGREATER:
2871         case EXPR_BINARY_ISGREATEREQUAL:
2872         case EXPR_BINARY_ISLESS:
2873         case EXPR_BINARY_ISLESSEQUAL:
2874         case EXPR_BINARY_ISLESSGREATER:
2875         case EXPR_BINARY_ISUNORDERED: {
2876                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2877                 ir_node *left  = expression_to_firm(expression->left);
2878                 ir_node *right = expression_to_firm(expression->right);
2879                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2880                 long     pnc   = get_pnc(kind, expression->left->base.type);
2881                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2882                 return proj;
2883         }
2884         case EXPR_BINARY_ASSIGN: {
2885                 ir_node *addr  = expression_to_addr(expression->left);
2886                 ir_node *right = expression_to_firm(expression->right);
2887                 ir_node *res
2888                         = set_value_for_expression_addr(expression->left, right, addr);
2889
2890                 type_t  *type            = skip_typeref(expression->base.type);
2891                 if (!is_type_compound(type)) {
2892                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2893                         res                      = create_conv(NULL, res, mode_arithmetic);
2894                 }
2895                 return res;
2896         }
2897         case EXPR_BINARY_ADD:
2898         case EXPR_BINARY_SUB:
2899         case EXPR_BINARY_MUL:
2900         case EXPR_BINARY_DIV:
2901         case EXPR_BINARY_MOD:
2902         case EXPR_BINARY_BITWISE_AND:
2903         case EXPR_BINARY_BITWISE_OR:
2904         case EXPR_BINARY_BITWISE_XOR:
2905         case EXPR_BINARY_SHIFTLEFT:
2906         case EXPR_BINARY_SHIFTRIGHT:
2907         {
2908                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2909                 ir_node  *left  = expression_to_firm(expression->left);
2910                 ir_node  *right = expression_to_firm(expression->right);
2911                 return create_op(dbgi, expression, left, right);
2912         }
2913         case EXPR_BINARY_LOGICAL_AND:
2914         case EXPR_BINARY_LOGICAL_OR:
2915                 return create_lazy_op(expression);
2916         case EXPR_BINARY_COMMA:
2917                 /* create side effects of left side */
2918                 (void) expression_to_firm(expression->left);
2919                 return _expression_to_firm(expression->right);
2920
2921         case EXPR_BINARY_ADD_ASSIGN:
2922         case EXPR_BINARY_SUB_ASSIGN:
2923         case EXPR_BINARY_MUL_ASSIGN:
2924         case EXPR_BINARY_MOD_ASSIGN:
2925         case EXPR_BINARY_DIV_ASSIGN:
2926         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2927         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2928         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2929         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2930         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2931                 return create_assign_binop(expression);
2932         default:
2933                 panic("TODO binexpr type");
2934         }
2935 }
2936
2937 static ir_node *array_access_addr(const array_access_expression_t *expression)
2938 {
2939         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2940         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2941         ir_node  *offset      = expression_to_firm(expression->index);
2942         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2943         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2944         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2945
2946         return result;
2947 }
2948
2949 static ir_node *array_access_to_firm(
2950                 const array_access_expression_t *expression)
2951 {
2952         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2953         ir_node  *addr   = array_access_addr(expression);
2954         type_t   *type   = revert_automatic_type_conversion(
2955                         (const expression_t*) expression);
2956         type             = skip_typeref(type);
2957
2958         return deref_address(dbgi, type, addr);
2959 }
2960
2961 static long get_offsetof_offset(const offsetof_expression_t *expression)
2962 {
2963         type_t *orig_type = expression->type;
2964         long    offset    = 0;
2965
2966         designator_t *designator = expression->designator;
2967         for ( ; designator != NULL; designator = designator->next) {
2968                 type_t *type = skip_typeref(orig_type);
2969                 /* be sure the type is constructed */
2970                 (void) get_ir_type(type);
2971
2972                 if (designator->symbol != NULL) {
2973                         assert(is_type_compound(type));
2974                         symbol_t *symbol = designator->symbol;
2975
2976                         compound_t *compound = type->compound.compound;
2977                         entity_t   *iter     = compound->members.entities;
2978                         for ( ; iter != NULL; iter = iter->base.next) {
2979                                 if (iter->base.symbol == symbol) {
2980                                         break;
2981                                 }
2982                         }
2983                         assert(iter != NULL);
2984
2985                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2986                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2987                         offset += get_entity_offset(iter->compound_member.entity);
2988
2989                         orig_type = iter->declaration.type;
2990                 } else {
2991                         expression_t *array_index = designator->array_index;
2992                         assert(designator->array_index != NULL);
2993                         assert(is_type_array(type));
2994
2995                         long index         = fold_constant_to_int(array_index);
2996                         ir_type *arr_type  = get_ir_type(type);
2997                         ir_type *elem_type = get_array_element_type(arr_type);
2998                         long     elem_size = get_type_size_bytes(elem_type);
2999
3000                         offset += index * elem_size;
3001
3002                         orig_type = type->array.element_type;
3003                 }
3004         }
3005
3006         return offset;
3007 }
3008
3009 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
3010 {
3011         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
3012         long       offset = get_offsetof_offset(expression);
3013         ir_tarval *tv     = new_tarval_from_long(offset, mode);
3014         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
3015
3016         return new_d_Const(dbgi, tv);
3017 }
3018
3019 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3020                                      ir_entity *entity, type_t *type);
3021
3022 static ir_node *compound_literal_to_firm(
3023                 const compound_literal_expression_t *expression)
3024 {
3025         type_t *type = expression->type;
3026
3027         /* create an entity on the stack */
3028         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3029
3030         ident     *const id     = id_unique("CompLit.%u");
3031         ir_type   *const irtype = get_ir_type(type);
3032         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
3033         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
3034         set_entity_ld_ident(entity, id);
3035
3036         /* create initialisation code */
3037         initializer_t *initializer = expression->initializer;
3038         create_local_initializer(initializer, dbgi, entity, type);
3039
3040         /* create a sel for the compound literal address */
3041         ir_node *frame = get_irg_frame(current_ir_graph);
3042         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3043         return sel;
3044 }
3045
3046 /**
3047  * Transform a sizeof expression into Firm code.
3048  */
3049 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
3050 {
3051         type_t *const type = skip_typeref(expression->type);
3052         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
3053         if (is_type_array(type) && type->array.is_vla
3054                         && expression->tp_expression != NULL) {
3055                 expression_to_firm(expression->tp_expression);
3056         }
3057
3058         return get_type_size_node(type);
3059 }
3060
3061 static entity_t *get_expression_entity(const expression_t *expression)
3062 {
3063         if (expression->kind != EXPR_REFERENCE)
3064                 return NULL;
3065
3066         return expression->reference.entity;
3067 }
3068
3069 static unsigned get_cparser_entity_alignment(const entity_t *entity)
3070 {
3071         switch(entity->kind) {
3072         DECLARATION_KIND_CASES
3073                 return entity->declaration.alignment;
3074         case ENTITY_STRUCT:
3075         case ENTITY_UNION:
3076                 return entity->compound.alignment;
3077         case ENTITY_TYPEDEF:
3078                 return entity->typedefe.alignment;
3079         default:
3080                 break;
3081         }
3082         return 0;
3083 }
3084
3085 /**
3086  * Transform an alignof expression into Firm code.
3087  */
3088 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
3089 {
3090         unsigned alignment = 0;
3091
3092         const expression_t *tp_expression = expression->tp_expression;
3093         if (tp_expression != NULL) {
3094                 entity_t *entity = get_expression_entity(tp_expression);
3095                 if (entity != NULL) {
3096                         alignment = get_cparser_entity_alignment(entity);
3097                 }
3098         }
3099
3100         if (alignment == 0) {
3101                 type_t *type = expression->type;
3102                 alignment = get_type_alignment(type);
3103         }
3104
3105         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
3106         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
3107         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
3108         return new_d_Const(dbgi, tv);
3109 }
3110
3111 static void init_ir_types(void);
3112
3113 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
3114 {
3115         assert(is_type_valid(skip_typeref(expression->base.type)));
3116
3117         bool constant_folding_old = constant_folding;
3118         constant_folding = true;
3119
3120         init_ir_types();
3121
3122         assert(is_constant_expression(expression));
3123
3124         ir_graph *old_current_ir_graph = current_ir_graph;
3125         current_ir_graph = get_const_code_irg();
3126
3127         ir_node *cnst = expression_to_firm(expression);
3128         current_ir_graph = old_current_ir_graph;
3129
3130         if (!is_Const(cnst)) {
3131                 panic("couldn't fold constant");
3132         }
3133
3134         constant_folding = constant_folding_old;
3135
3136         return get_Const_tarval(cnst);
3137 }
3138
3139 long fold_constant_to_int(const expression_t *expression)
3140 {
3141         if (expression->kind == EXPR_INVALID)
3142                 return 0;
3143
3144         ir_tarval *tv = fold_constant_to_tarval(expression);
3145         if (!tarval_is_long(tv)) {
3146                 panic("result of constant folding is not integer");
3147         }
3148
3149         return get_tarval_long(tv);
3150 }
3151
3152 bool fold_constant_to_bool(const expression_t *expression)
3153 {
3154         if (expression->kind == EXPR_INVALID)
3155                 return false;
3156         ir_tarval *tv = fold_constant_to_tarval(expression);
3157         return !tarval_is_null(tv);
3158 }
3159
3160 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3161 {
3162         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3163
3164         /* first try to fold a constant condition */
3165         if (is_constant_expression(expression->condition)) {
3166                 bool val = fold_constant_to_bool(expression->condition);
3167                 if (val) {
3168                         expression_t *true_expression = expression->true_expression;
3169                         if (true_expression == NULL)
3170                                 true_expression = expression->condition;
3171                         return expression_to_firm(true_expression);
3172                 } else {
3173                         return expression_to_firm(expression->false_expression);
3174                 }
3175         }
3176
3177         ir_node *cur_block   = get_cur_block();
3178
3179         /* create the true block */
3180         ir_node *true_block  = new_immBlock();
3181         set_cur_block(true_block);
3182
3183         ir_node *true_val = expression->true_expression != NULL ?
3184                 expression_to_firm(expression->true_expression) : NULL;
3185         ir_node *true_jmp = new_Jmp();
3186
3187         /* create the false block */
3188         ir_node *false_block = new_immBlock();
3189         set_cur_block(false_block);
3190
3191         ir_node *false_val = expression_to_firm(expression->false_expression);
3192         ir_node *false_jmp = new_Jmp();
3193
3194         /* create the condition evaluation */
3195         set_cur_block(cur_block);
3196         ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
3197         if (expression->true_expression == NULL) {
3198                 if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3199                         true_val = cond_expr;
3200                 } else {
3201                         /* Condition ended with a short circuit (&&, ||, !) operation or a
3202                          * comparison.  Generate a "1" as value for the true branch. */
3203                         true_val = new_Const(get_mode_one(mode_Is));
3204                 }
3205         }
3206         mature_immBlock(true_block);
3207         mature_immBlock(false_block);
3208
3209         /* create the common block */
3210         ir_node *in_cf[2] = { true_jmp, false_jmp };
3211         ir_node *block = new_Block(2, in_cf);
3212         set_cur_block(block);
3213
3214         /* TODO improve static semantics, so either both or no values are NULL */
3215         if (true_val == NULL || false_val == NULL)
3216                 return NULL;
3217
3218         ir_node *in[2] = { true_val, false_val };
3219         ir_mode *mode  = get_irn_mode(true_val);
3220         assert(get_irn_mode(false_val) == mode);
3221         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
3222
3223         return val;
3224 }
3225
3226 /**
3227  * Returns an IR-node representing the address of a field.
3228  */
3229 static ir_node *select_addr(const select_expression_t *expression)
3230 {
3231         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3232
3233         construct_select_compound(expression);
3234
3235         ir_node *compound_addr = expression_to_firm(expression->compound);
3236
3237         entity_t *entry = expression->compound_entry;
3238         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3239         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3240
3241         if (constant_folding) {
3242                 ir_mode *mode = get_irn_mode(compound_addr);
3243                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
3244                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
3245                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3246         } else {
3247                 ir_entity *irentity = entry->compound_member.entity;
3248                 assert(irentity != NULL);
3249                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3250         }
3251 }
3252
3253 static ir_node *select_to_firm(const select_expression_t *expression)
3254 {
3255         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3256         ir_node  *addr = select_addr(expression);
3257         type_t   *type = revert_automatic_type_conversion(
3258                         (const expression_t*) expression);
3259         type           = skip_typeref(type);
3260
3261         entity_t *entry      = expression->compound_entry;
3262         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3263         type_t   *entry_type = skip_typeref(entry->declaration.type);
3264
3265         if (entry_type->kind == TYPE_BITFIELD) {
3266                 return bitfield_extract_to_firm(expression, addr);
3267         }
3268
3269         return deref_address(dbgi, type, addr);
3270 }
3271
3272 /* Values returned by __builtin_classify_type. */
3273 typedef enum gcc_type_class
3274 {
3275         no_type_class = -1,
3276         void_type_class,
3277         integer_type_class,
3278         char_type_class,
3279         enumeral_type_class,
3280         boolean_type_class,
3281         pointer_type_class,
3282         reference_type_class,
3283         offset_type_class,
3284         real_type_class,
3285         complex_type_class,
3286         function_type_class,
3287         method_type_class,
3288         record_type_class,
3289         union_type_class,
3290         array_type_class,
3291         string_type_class,
3292         set_type_class,
3293         file_type_class,
3294         lang_type_class
3295 } gcc_type_class;
3296
3297 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3298 {
3299         type_t *type = expr->type_expression->base.type;
3300
3301         /* FIXME gcc returns different values depending on whether compiling C or C++
3302          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3303         gcc_type_class tc;
3304         for (;;) {
3305                 type = skip_typeref(type);
3306                 switch (type->kind) {
3307                         case TYPE_ATOMIC: {
3308                                 const atomic_type_t *const atomic_type = &type->atomic;
3309                                 switch (atomic_type->akind) {
3310                                         /* should not be reached */
3311                                         case ATOMIC_TYPE_INVALID:
3312                                                 tc = no_type_class;
3313                                                 goto make_const;
3314
3315                                         /* gcc cannot do that */
3316                                         case ATOMIC_TYPE_VOID:
3317                                                 tc = void_type_class;
3318                                                 goto make_const;
3319
3320                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3321                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3322                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3323                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3324                                         case ATOMIC_TYPE_SHORT:
3325                                         case ATOMIC_TYPE_USHORT:
3326                                         case ATOMIC_TYPE_INT:
3327                                         case ATOMIC_TYPE_UINT:
3328                                         case ATOMIC_TYPE_LONG:
3329                                         case ATOMIC_TYPE_ULONG:
3330                                         case ATOMIC_TYPE_LONGLONG:
3331                                         case ATOMIC_TYPE_ULONGLONG:
3332                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3333                                                 tc = integer_type_class;
3334                                                 goto make_const;
3335
3336                                         case ATOMIC_TYPE_FLOAT:
3337                                         case ATOMIC_TYPE_DOUBLE:
3338                                         case ATOMIC_TYPE_LONG_DOUBLE:
3339                                                 tc = real_type_class;
3340                                                 goto make_const;
3341                                 }
3342                                 panic("Unexpected atomic type in classify_type_to_firm().");
3343                         }
3344
3345                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3346                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3347                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
3348                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3349                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3350                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3351                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3352                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3353
3354                         /* gcc handles this as integer */
3355                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3356
3357                         /* gcc classifies the referenced type */
3358                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3359
3360                         case TYPE_BUILTIN:
3361                         /* typedef/typeof should be skipped already */
3362                         case TYPE_TYPEDEF:
3363                         case TYPE_TYPEOF:
3364                         case TYPE_INVALID:
3365                         case TYPE_ERROR:
3366                                 break;
3367                 }
3368                 panic("unexpected TYPE classify_type_to_firm().");
3369         }
3370
3371 make_const:;
3372         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3373         ir_tarval *const tv   = new_tarval_from_long(tc, mode_int);
3374         return new_d_Const(dbgi, tv);
3375 }
3376
3377 static ir_node *function_name_to_firm(
3378                 const funcname_expression_t *const expr)
3379 {
3380         switch(expr->kind) {
3381         case FUNCNAME_FUNCTION:
3382         case FUNCNAME_PRETTY_FUNCTION:
3383         case FUNCNAME_FUNCDNAME:
3384                 if (current_function_name == NULL) {
3385                         const source_position_t *const src_pos = &expr->base.source_position;
3386                         const char    *name  = current_function_entity->base.symbol->string;
3387                         const string_t string = { name, strlen(name) + 1 };
3388                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3389                 }
3390                 return current_function_name;
3391         case FUNCNAME_FUNCSIG:
3392                 if (current_funcsig == NULL) {
3393                         const source_position_t *const src_pos = &expr->base.source_position;
3394                         ir_entity *ent = get_irg_entity(current_ir_graph);
3395                         const char *const name = get_entity_ld_name(ent);
3396                         const string_t string = { name, strlen(name) + 1 };
3397                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3398                 }
3399                 return current_funcsig;
3400         }
3401         panic("Unsupported function name");
3402 }
3403
3404 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3405 {
3406         statement_t *statement = expr->statement;
3407
3408         assert(statement->kind == STATEMENT_COMPOUND);
3409         return compound_statement_to_firm(&statement->compound);
3410 }
3411
3412 static ir_node *va_start_expression_to_firm(
3413         const va_start_expression_t *const expr)
3414 {
3415         type_t    *const type        = current_function_entity->declaration.type;
3416         ir_type   *const method_type = get_ir_type(type);
3417         int        const n           = get_method_n_params(method_type) - 1;
3418         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3419         ir_node   *const frame       = get_irg_frame(current_ir_graph);
3420         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3421         ir_node   *const no_mem      = new_NoMem();
3422         ir_node   *const arg_sel     =
3423                 new_d_simpleSel(dbgi, no_mem, frame, parm_ent);
3424
3425         type_t    *const param_type  = expr->parameter->base.type;
3426         ir_node   *const cnst        = get_type_size_node(param_type);
3427         ir_mode   *const mode        = get_irn_mode(cnst);
3428         ir_node   *const c1          = new_Const_long(mode, stack_param_align - 1);
3429         ir_node   *const c2          = new_d_Add(dbgi, cnst, c1, mode);
3430         ir_node   *const c3          = new_Const_long(mode, -(long)stack_param_align);
3431         ir_node   *const c4          = new_d_And(dbgi, c2, c3, mode);
3432         ir_node   *const add         = new_d_Add(dbgi, arg_sel, c4, mode_P_data);
3433         set_value_for_expression(expr->ap, add);
3434
3435         return NULL;
3436 }
3437
3438 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3439 {
3440         type_t       *const type    = expr->base.type;
3441         expression_t *const ap_expr = expr->ap;
3442         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3443         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3444         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3445         ir_node      *const res     = deref_address(dbgi, type, ap);
3446
3447         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3448         ir_mode      *const mode    = get_irn_mode(cnst);
3449         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3450         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3451         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3452         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3453         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3454
3455         set_value_for_expression_addr(ap_expr, add, ap_addr);
3456
3457         return res;
3458 }
3459
3460 /**
3461  * Generate Firm for a va_copy expression.
3462  */
3463 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3464 {
3465         ir_node *const src = expression_to_firm(expr->src);
3466         set_value_for_expression(expr->dst, src);
3467         return NULL;
3468 }
3469
3470 static ir_node *dereference_addr(const unary_expression_t *const expression)
3471 {
3472         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3473         return expression_to_firm(expression->value);
3474 }
3475
3476 /**
3477  * Returns a IR-node representing an lvalue of the given expression.
3478  */
3479 static ir_node *expression_to_addr(const expression_t *expression)
3480 {
3481         switch(expression->kind) {
3482         case EXPR_ARRAY_ACCESS:
3483                 return array_access_addr(&expression->array_access);
3484         case EXPR_CALL:
3485                 return call_expression_to_firm(&expression->call);
3486         case EXPR_COMPOUND_LITERAL:
3487                 return compound_literal_to_firm(&expression->compound_literal);
3488         case EXPR_REFERENCE:
3489                 return reference_addr(&expression->reference);
3490         case EXPR_SELECT:
3491                 return select_addr(&expression->select);
3492         case EXPR_UNARY_DEREFERENCE:
3493                 return dereference_addr(&expression->unary);
3494         default:
3495                 break;
3496         }
3497         panic("trying to get address of non-lvalue");
3498 }
3499
3500 static ir_node *builtin_constant_to_firm(
3501                 const builtin_constant_expression_t *expression)
3502 {
3503         ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3504         long     v;
3505
3506         if (is_constant_expression(expression->value)) {
3507                 v = 1;
3508         } else {
3509                 v = 0;
3510         }
3511         return new_Const_long(mode, v);
3512 }
3513
3514 static ir_node *builtin_types_compatible_to_firm(
3515                 const builtin_types_compatible_expression_t *expression)
3516 {
3517         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3518         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3519         long     const value = types_compatible(left, right) ? 1 : 0;
3520         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3521         return new_Const_long(mode, value);
3522 }
3523
3524 static ir_node *get_label_block(label_t *label)
3525 {
3526         if (label->block != NULL)
3527                 return label->block;
3528
3529         /* beware: might be called from create initializer with current_ir_graph
3530          * set to const_code_irg. */
3531         ir_graph *rem    = current_ir_graph;
3532         current_ir_graph = current_function;
3533
3534         ir_node *block = new_immBlock();
3535
3536         label->block = block;
3537
3538         ARR_APP1(label_t *, all_labels, label);
3539
3540         current_ir_graph = rem;
3541         return block;
3542 }
3543
3544 /**
3545  * Pointer to a label.  This is used for the
3546  * GNU address-of-label extension.
3547  */
3548 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3549 {
3550         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3551         ir_node   *block  = get_label_block(label->label);
3552         ir_entity *entity = create_Block_entity(block);
3553
3554         symconst_symbol value;
3555         value.entity_p = entity;
3556         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3557 }
3558
3559 /**
3560  * creates firm nodes for an expression. The difference between this function
3561  * and expression_to_firm is, that this version might produce mode_b nodes
3562  * instead of mode_Is.
3563  */
3564 static ir_node *_expression_to_firm(const expression_t *expression)
3565 {
3566 #ifndef NDEBUG
3567         if (!constant_folding) {
3568                 assert(!expression->base.transformed);
3569                 ((expression_t*) expression)->base.transformed = true;
3570         }
3571 #endif
3572
3573         switch (expression->kind) {
3574         EXPR_LITERAL_CASES
3575                 return literal_to_firm(&expression->literal);
3576         case EXPR_STRING_LITERAL:
3577                 return string_to_firm(&expression->base.source_position, "str.%u",
3578                                       &expression->literal.value);
3579         case EXPR_WIDE_STRING_LITERAL:
3580                 return wide_string_literal_to_firm(&expression->string_literal);
3581         case EXPR_REFERENCE:
3582                 return reference_expression_to_firm(&expression->reference);
3583         case EXPR_REFERENCE_ENUM_VALUE:
3584                 return reference_expression_enum_value_to_firm(&expression->reference);
3585         case EXPR_CALL:
3586                 return call_expression_to_firm(&expression->call);
3587         EXPR_UNARY_CASES
3588                 return unary_expression_to_firm(&expression->unary);
3589         EXPR_BINARY_CASES
3590                 return binary_expression_to_firm(&expression->binary);
3591         case EXPR_ARRAY_ACCESS:
3592                 return array_access_to_firm(&expression->array_access);
3593         case EXPR_SIZEOF:
3594                 return sizeof_to_firm(&expression->typeprop);
3595         case EXPR_ALIGNOF:
3596                 return alignof_to_firm(&expression->typeprop);
3597         case EXPR_CONDITIONAL:
3598                 return conditional_to_firm(&expression->conditional);
3599         case EXPR_SELECT:
3600                 return select_to_firm(&expression->select);
3601         case EXPR_CLASSIFY_TYPE:
3602                 return classify_type_to_firm(&expression->classify_type);
3603         case EXPR_FUNCNAME:
3604                 return function_name_to_firm(&expression->funcname);
3605         case EXPR_STATEMENT:
3606                 return statement_expression_to_firm(&expression->statement);
3607         case EXPR_VA_START:
3608                 return va_start_expression_to_firm(&expression->va_starte);
3609         case EXPR_VA_ARG:
3610                 return va_arg_expression_to_firm(&expression->va_arge);
3611         case EXPR_VA_COPY:
3612                 return va_copy_expression_to_firm(&expression->va_copye);
3613         case EXPR_BUILTIN_CONSTANT_P:
3614                 return builtin_constant_to_firm(&expression->builtin_constant);
3615         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3616                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3617         case EXPR_OFFSETOF:
3618                 return offsetof_to_firm(&expression->offsetofe);
3619         case EXPR_COMPOUND_LITERAL:
3620                 return compound_literal_to_firm(&expression->compound_literal);
3621         case EXPR_LABEL_ADDRESS:
3622                 return label_address_to_firm(&expression->label_address);
3623
3624         case EXPR_UNKNOWN:
3625         case EXPR_INVALID:
3626                 break;
3627         }
3628         panic("invalid expression found");
3629 }
3630
3631 /**
3632  * Check if a given expression is a GNU __builtin_expect() call.
3633  */
3634 static bool is_builtin_expect(const expression_t *expression)
3635 {
3636         if (expression->kind != EXPR_CALL)
3637                 return false;
3638
3639         expression_t *function = expression->call.function;
3640         if (function->kind != EXPR_REFERENCE)
3641                 return false;
3642         reference_expression_t *ref = &function->reference;
3643         if (ref->entity->kind         != ENTITY_FUNCTION ||
3644             ref->entity->function.btk != bk_gnu_builtin_expect)
3645                 return false;
3646
3647         return true;
3648 }
3649
3650 static bool produces_mode_b(const expression_t *expression)
3651 {
3652         switch (expression->kind) {
3653         case EXPR_BINARY_EQUAL:
3654         case EXPR_BINARY_NOTEQUAL:
3655         case EXPR_BINARY_LESS:
3656         case EXPR_BINARY_LESSEQUAL:
3657         case EXPR_BINARY_GREATER:
3658         case EXPR_BINARY_GREATEREQUAL:
3659         case EXPR_BINARY_ISGREATER:
3660         case EXPR_BINARY_ISGREATEREQUAL:
3661         case EXPR_BINARY_ISLESS:
3662         case EXPR_BINARY_ISLESSEQUAL:
3663         case EXPR_BINARY_ISLESSGREATER:
3664         case EXPR_BINARY_ISUNORDERED:
3665         case EXPR_UNARY_NOT:
3666                 return true;
3667
3668         case EXPR_CALL:
3669                 if (is_builtin_expect(expression)) {
3670                         expression_t *argument = expression->call.arguments->expression;
3671                         return produces_mode_b(argument);
3672                 }
3673                 return false;
3674         case EXPR_BINARY_COMMA:
3675                 return produces_mode_b(expression->binary.right);
3676
3677         default:
3678                 return false;
3679         }
3680 }
3681
3682 static ir_node *expression_to_firm(const expression_t *expression)
3683 {
3684         if (!produces_mode_b(expression)) {
3685                 ir_node *res = _expression_to_firm(expression);
3686                 assert(res == NULL || get_irn_mode(res) != mode_b);
3687                 return res;
3688         }
3689
3690         if (is_constant_expression(expression)) {
3691                 ir_node *res  = _expression_to_firm(expression);
3692                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3693                 assert(is_Const(res));
3694                 if (is_Const_null(res)) {
3695                         return new_Const_long(mode, 0);
3696                 } else {
3697                         return new_Const_long(mode, 1);
3698                 }
3699         }
3700
3701         /* we have to produce a 0/1 from the mode_b expression */
3702         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3703         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3704         return produce_condition_result(expression, mode, dbgi);
3705 }
3706
3707 /**
3708  * create a short-circuit expression evaluation that tries to construct
3709  * efficient control flow structures for &&, || and ! expressions
3710  */
3711 static ir_node *create_condition_evaluation(const expression_t *expression,
3712                                             ir_node *true_block,
3713                                             ir_node *false_block)
3714 {
3715         switch(expression->kind) {
3716         case EXPR_UNARY_NOT: {
3717                 const unary_expression_t *unary_expression = &expression->unary;
3718                 create_condition_evaluation(unary_expression->value, false_block,
3719                                             true_block);
3720                 return NULL;
3721         }
3722         case EXPR_BINARY_LOGICAL_AND: {
3723                 const binary_expression_t *binary_expression = &expression->binary;
3724
3725                 ir_node *extra_block = new_immBlock();
3726                 create_condition_evaluation(binary_expression->left, extra_block,
3727                                             false_block);
3728                 mature_immBlock(extra_block);
3729                 set_cur_block(extra_block);
3730                 create_condition_evaluation(binary_expression->right, true_block,
3731                                             false_block);
3732                 return NULL;
3733         }
3734         case EXPR_BINARY_LOGICAL_OR: {
3735                 const binary_expression_t *binary_expression = &expression->binary;
3736
3737                 ir_node *extra_block = new_immBlock();
3738                 create_condition_evaluation(binary_expression->left, true_block,
3739                                             extra_block);
3740                 mature_immBlock(extra_block);
3741                 set_cur_block(extra_block);
3742                 create_condition_evaluation(binary_expression->right, true_block,
3743                                             false_block);
3744                 return NULL;
3745         }
3746         default:
3747                 break;
3748         }
3749
3750         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3751         ir_node  *cond_expr  = _expression_to_firm(expression);
3752         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3753         ir_node  *cond       = new_d_Cond(dbgi, condition);
3754         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3755         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3756
3757         /* set branch prediction info based on __builtin_expect */
3758         if (is_builtin_expect(expression) && is_Cond(cond)) {
3759                 call_argument_t *argument = expression->call.arguments->next;
3760                 if (is_constant_expression(argument->expression)) {
3761                         bool             cnst = fold_constant_to_bool(argument->expression);
3762                         cond_jmp_predicate pred;
3763
3764                         if (cnst == false) {
3765                                 pred = COND_JMP_PRED_FALSE;
3766                         } else {
3767                                 pred = COND_JMP_PRED_TRUE;
3768                         }
3769                         set_Cond_jmp_pred(cond, pred);
3770                 }
3771         }
3772
3773         add_immBlock_pred(true_block, true_proj);
3774         add_immBlock_pred(false_block, false_proj);
3775
3776         set_cur_block(NULL);
3777         return cond_expr;
3778 }
3779
3780 static void create_variable_entity(entity_t *variable,
3781                                    declaration_kind_t declaration_kind,
3782                                    ir_type *parent_type)
3783 {
3784         assert(variable->kind == ENTITY_VARIABLE);
3785         type_t    *type = skip_typeref(variable->declaration.type);
3786
3787         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3788         ir_type   *const irtype    = get_ir_type(type);
3789         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3790         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3791         unsigned         alignment = variable->declaration.alignment;
3792
3793         set_entity_alignment(irentity, alignment);
3794
3795         handle_decl_modifiers(irentity, variable);
3796
3797         variable->declaration.kind  = (unsigned char) declaration_kind;
3798         variable->variable.v.entity = irentity;
3799         set_entity_ld_ident(irentity, create_ld_ident(variable));
3800
3801         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3802                 set_entity_volatility(irentity, volatility_is_volatile);
3803         }
3804 }
3805
3806
3807 typedef struct type_path_entry_t type_path_entry_t;
3808 struct type_path_entry_t {
3809         type_t           *type;
3810         ir_initializer_t *initializer;
3811         size_t            index;
3812         entity_t         *compound_entry;
3813 };
3814
3815 typedef struct type_path_t type_path_t;
3816 struct type_path_t {
3817         type_path_entry_t *path;
3818         type_t            *top_type;
3819         bool               invalid;
3820 };
3821
3822 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3823 {
3824         size_t len = ARR_LEN(path->path);
3825
3826         for (size_t i = 0; i < len; ++i) {
3827                 const type_path_entry_t *entry = & path->path[i];
3828
3829                 type_t *type = skip_typeref(entry->type);
3830                 if (is_type_compound(type)) {
3831                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3832                 } else if (is_type_array(type)) {
3833                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3834                 } else {
3835                         fprintf(stderr, "-INVALID-");
3836                 }
3837         }
3838         fprintf(stderr, "  (");
3839         print_type(path->top_type);
3840         fprintf(stderr, ")");
3841 }
3842
3843 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3844 {
3845         size_t len = ARR_LEN(path->path);
3846         assert(len > 0);
3847         return & path->path[len-1];
3848 }
3849
3850 static type_path_entry_t *append_to_type_path(type_path_t *path)
3851 {
3852         size_t len = ARR_LEN(path->path);
3853         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3854
3855         type_path_entry_t *result = & path->path[len];
3856         memset(result, 0, sizeof(result[0]));
3857         return result;
3858 }
3859
3860 static size_t get_compound_member_count(const compound_type_t *type)
3861 {
3862         compound_t *compound  = type->compound;
3863         size_t      n_members = 0;
3864         entity_t   *member    = compound->members.entities;
3865         for ( ; member != NULL; member = member->base.next) {
3866                 ++n_members;
3867         }
3868
3869         return n_members;
3870 }
3871
3872 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3873 {
3874         type_t *orig_top_type = path->top_type;
3875         type_t *top_type      = skip_typeref(orig_top_type);
3876
3877         assert(is_type_compound(top_type) || is_type_array(top_type));
3878
3879         if (ARR_LEN(path->path) == 0) {
3880                 return NULL;
3881         } else {
3882                 type_path_entry_t *top         = get_type_path_top(path);
3883                 ir_initializer_t  *initializer = top->initializer;
3884                 return get_initializer_compound_value(initializer, top->index);
3885         }
3886 }
3887
3888 static void descend_into_subtype(type_path_t *path)
3889 {
3890         type_t *orig_top_type = path->top_type;
3891         type_t *top_type      = skip_typeref(orig_top_type);
3892
3893         assert(is_type_compound(top_type) || is_type_array(top_type));
3894
3895         ir_initializer_t *initializer = get_initializer_entry(path);
3896
3897         type_path_entry_t *top = append_to_type_path(path);
3898         top->type              = top_type;
3899
3900         size_t len;
3901
3902         if (is_type_compound(top_type)) {
3903                 compound_t *compound = top_type->compound.compound;
3904                 entity_t   *entry    = compound->members.entities;
3905
3906                 top->compound_entry = entry;
3907                 top->index          = 0;
3908                 len                 = get_compound_member_count(&top_type->compound);
3909                 if (entry != NULL) {
3910                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3911                         path->top_type = entry->declaration.type;
3912                 }
3913         } else {
3914                 assert(is_type_array(top_type));
3915                 assert(top_type->array.size > 0);
3916
3917                 top->index     = 0;
3918                 path->top_type = top_type->array.element_type;
3919                 len            = top_type->array.size;
3920         }
3921         if (initializer == NULL
3922                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3923                 initializer = create_initializer_compound(len);
3924                 /* we have to set the entry at the 2nd latest path entry... */
3925                 size_t path_len = ARR_LEN(path->path);
3926                 assert(path_len >= 1);
3927                 if (path_len > 1) {
3928                         type_path_entry_t *entry        = & path->path[path_len-2];
3929                         ir_initializer_t  *tinitializer = entry->initializer;
3930                         set_initializer_compound_value(tinitializer, entry->index,
3931                                                        initializer);
3932                 }
3933         }
3934         top->initializer = initializer;
3935 }
3936
3937 static void ascend_from_subtype(type_path_t *path)
3938 {
3939         type_path_entry_t *top = get_type_path_top(path);
3940
3941         path->top_type = top->type;
3942
3943         size_t len = ARR_LEN(path->path);
3944         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3945 }
3946
3947 static void walk_designator(type_path_t *path, const designator_t *designator)
3948 {
3949         /* designators start at current object type */
3950         ARR_RESIZE(type_path_entry_t, path->path, 1);
3951
3952         for ( ; designator != NULL; designator = designator->next) {
3953                 type_path_entry_t *top         = get_type_path_top(path);
3954                 type_t            *orig_type   = top->type;
3955                 type_t            *type        = skip_typeref(orig_type);
3956
3957                 if (designator->symbol != NULL) {
3958                         assert(is_type_compound(type));
3959                         size_t    index  = 0;
3960                         symbol_t *symbol = designator->symbol;
3961
3962                         compound_t *compound = type->compound.compound;
3963                         entity_t   *iter     = compound->members.entities;
3964                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3965                                 if (iter->base.symbol == symbol) {
3966                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3967                                         break;
3968                                 }
3969                         }
3970                         assert(iter != NULL);
3971
3972                         /* revert previous initialisations of other union elements */
3973                         if (type->kind == TYPE_COMPOUND_UNION) {
3974                                 ir_initializer_t *initializer = top->initializer;
3975                                 if (initializer != NULL
3976                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3977                                         /* are we writing to a new element? */
3978                                         ir_initializer_t *oldi
3979                                                 = get_initializer_compound_value(initializer, index);
3980                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3981                                                 /* clear initializer */
3982                                                 size_t len
3983                                                         = get_initializer_compound_n_entries(initializer);
3984                                                 ir_initializer_t *nulli = get_initializer_null();
3985                                                 for (size_t i = 0; i < len; ++i) {
3986                                                         set_initializer_compound_value(initializer, i,
3987                                                                                        nulli);
3988                                                 }
3989                                         }
3990                                 }
3991                         }
3992
3993                         top->type           = orig_type;
3994                         top->compound_entry = iter;
3995                         top->index          = index;
3996                         orig_type           = iter->declaration.type;
3997                 } else {
3998                         expression_t *array_index = designator->array_index;
3999                         assert(designator->array_index != NULL);
4000                         assert(is_type_array(type));
4001
4002                         long index = fold_constant_to_int(array_index);
4003                         assert(index >= 0);
4004 #ifndef NDEBUG
4005                         if (type->array.size_constant) {
4006                                 long array_size = type->array.size;
4007                                 assert(index < array_size);
4008                         }
4009 #endif
4010
4011                         top->type  = orig_type;
4012                         top->index = (size_t) index;
4013                         orig_type  = type->array.element_type;
4014                 }
4015                 path->top_type = orig_type;
4016
4017                 if (designator->next != NULL) {
4018                         descend_into_subtype(path);
4019                 }
4020         }
4021
4022         path->invalid  = false;
4023 }
4024
4025 static void advance_current_object(type_path_t *path)
4026 {
4027         if (path->invalid) {
4028                 /* TODO: handle this... */
4029                 panic("invalid initializer in ast2firm (excessive elements)");
4030         }
4031
4032         type_path_entry_t *top = get_type_path_top(path);
4033
4034         type_t *type = skip_typeref(top->type);
4035         if (is_type_union(type)) {
4036                 /* only the first element is initialized in unions */
4037                 top->compound_entry = NULL;
4038         } else if (is_type_struct(type)) {
4039                 entity_t *entry = top->compound_entry;
4040
4041                 top->index++;
4042                 entry               = entry->base.next;
4043                 top->compound_entry = entry;
4044                 if (entry != NULL) {
4045                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
4046                         path->top_type = entry->declaration.type;
4047                         return;
4048                 }
4049         } else {
4050                 assert(is_type_array(type));
4051
4052                 top->index++;
4053                 if (!type->array.size_constant || top->index < type->array.size) {
4054                         return;
4055                 }
4056         }
4057
4058         /* we're past the last member of the current sub-aggregate, try if we
4059          * can ascend in the type hierarchy and continue with another subobject */
4060         size_t len = ARR_LEN(path->path);
4061
4062         if (len > 1) {
4063                 ascend_from_subtype(path);
4064                 advance_current_object(path);
4065         } else {
4066                 path->invalid = true;
4067         }
4068 }
4069
4070
4071 static ir_initializer_t *create_ir_initializer(
4072                 const initializer_t *initializer, type_t *type);
4073
4074 static ir_initializer_t *create_ir_initializer_value(
4075                 const initializer_value_t *initializer)
4076 {
4077         if (is_type_compound(initializer->value->base.type)) {
4078                 panic("initializer creation for compounds not implemented yet");
4079         }
4080         type_t       *type = initializer->value->base.type;
4081         expression_t *expr = initializer->value;
4082         if (initializer_use_bitfield_basetype) {
4083                 type_t *skipped = skip_typeref(type);
4084                 if (skipped->kind == TYPE_BITFIELD) {
4085                         /* remove the bitfield cast... */
4086                         assert(expr->kind == EXPR_UNARY_CAST_IMPLICIT);
4087                         expr = expr->unary.value;
4088                         type = skipped->bitfield.base_type;
4089                 }
4090         }
4091         ir_node *value = expression_to_firm(expr);
4092         ir_mode *mode  = get_ir_mode_storage(type);
4093         value          = create_conv(NULL, value, mode);
4094         return create_initializer_const(value);
4095 }
4096
4097 /** test wether type can be initialized by a string constant */
4098 static bool is_string_type(type_t *type)
4099 {
4100         type_t *inner;
4101         if (is_type_pointer(type)) {
4102                 inner = skip_typeref(type->pointer.points_to);
4103         } else if(is_type_array(type)) {
4104                 inner = skip_typeref(type->array.element_type);
4105         } else {
4106                 return false;
4107         }
4108
4109         return is_type_integer(inner);
4110 }
4111
4112 static ir_initializer_t *create_ir_initializer_list(
4113                 const initializer_list_t *initializer, type_t *type)
4114 {
4115         type_path_t path;
4116         memset(&path, 0, sizeof(path));
4117         path.top_type = type;
4118         path.path     = NEW_ARR_F(type_path_entry_t, 0);
4119
4120         descend_into_subtype(&path);
4121
4122         for (size_t i = 0; i < initializer->len; ++i) {
4123                 const initializer_t *sub_initializer = initializer->initializers[i];
4124
4125                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
4126                         walk_designator(&path, sub_initializer->designator.designator);
4127                         continue;
4128                 }
4129
4130                 if (sub_initializer->kind == INITIALIZER_VALUE) {
4131                         /* we might have to descend into types until we're at a scalar
4132                          * type */
4133                         while(true) {
4134                                 type_t *orig_top_type = path.top_type;
4135                                 type_t *top_type      = skip_typeref(orig_top_type);
4136
4137                                 if (is_type_scalar(top_type))
4138                                         break;
4139                                 descend_into_subtype(&path);
4140                         }
4141                 } else if (sub_initializer->kind == INITIALIZER_STRING
4142                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
4143                         /* we might have to descend into types until we're at a scalar
4144                          * type */
4145                         while (true) {
4146                                 type_t *orig_top_type = path.top_type;
4147                                 type_t *top_type      = skip_typeref(orig_top_type);
4148
4149                                 if (is_string_type(top_type))
4150                                         break;
4151                                 descend_into_subtype(&path);
4152                         }
4153                 }
4154
4155                 ir_initializer_t *sub_irinitializer
4156                         = create_ir_initializer(sub_initializer, path.top_type);
4157
4158                 size_t path_len = ARR_LEN(path.path);
4159                 assert(path_len >= 1);
4160                 type_path_entry_t *entry        = & path.path[path_len-1];
4161                 ir_initializer_t  *tinitializer = entry->initializer;
4162                 set_initializer_compound_value(tinitializer, entry->index,
4163                                                sub_irinitializer);
4164
4165                 advance_current_object(&path);
4166         }
4167
4168         assert(ARR_LEN(path.path) >= 1);
4169         ir_initializer_t *result = path.path[0].initializer;
4170         DEL_ARR_F(path.path);
4171
4172         return result;
4173 }
4174
4175 static ir_initializer_t *create_ir_initializer_string(
4176                 const initializer_string_t *initializer, type_t *type)
4177 {
4178         type = skip_typeref(type);
4179
4180         size_t            string_len    = initializer->string.size;
4181         assert(type->kind == TYPE_ARRAY);
4182         assert(type->array.size_constant);
4183         size_t            len           = type->array.size;
4184         ir_initializer_t *irinitializer = create_initializer_compound(len);
4185
4186         const char *string = initializer->string.begin;
4187         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
4188
4189         for (size_t i = 0; i < len; ++i) {
4190                 char c = 0;
4191                 if (i < string_len)
4192                         c = string[i];
4193
4194                 ir_tarval        *tv = new_tarval_from_long(c, mode);
4195                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4196
4197                 set_initializer_compound_value(irinitializer, i, char_initializer);
4198         }
4199
4200         return irinitializer;
4201 }
4202
4203 static ir_initializer_t *create_ir_initializer_wide_string(
4204                 const initializer_wide_string_t *initializer, type_t *type)
4205 {
4206         assert(type->kind == TYPE_ARRAY);
4207         assert(type->array.size_constant);
4208         size_t            len           = type->array.size;
4209         size_t            string_len    = wstrlen(&initializer->string);
4210         ir_initializer_t *irinitializer = create_initializer_compound(len);
4211
4212         const char *p    = initializer->string.begin;
4213         ir_mode    *mode = get_type_mode(ir_type_wchar_t);
4214
4215         for (size_t i = 0; i < len; ++i) {
4216                 utf32 c = 0;
4217                 if (i < string_len) {
4218                         c = read_utf8_char(&p);
4219                 }
4220                 ir_tarval *tv = new_tarval_from_long(c, mode);
4221                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4222
4223                 set_initializer_compound_value(irinitializer, i, char_initializer);
4224         }
4225
4226         return irinitializer;
4227 }
4228
4229 static ir_initializer_t *create_ir_initializer(
4230                 const initializer_t *initializer, type_t *type)
4231 {
4232         switch(initializer->kind) {
4233                 case INITIALIZER_STRING:
4234                         return create_ir_initializer_string(&initializer->string, type);
4235
4236                 case INITIALIZER_WIDE_STRING:
4237                         return create_ir_initializer_wide_string(&initializer->wide_string,
4238                                                                  type);
4239
4240                 case INITIALIZER_LIST:
4241                         return create_ir_initializer_list(&initializer->list, type);
4242
4243                 case INITIALIZER_VALUE:
4244                         return create_ir_initializer_value(&initializer->value);
4245
4246                 case INITIALIZER_DESIGNATOR:
4247                         panic("unexpected designator initializer found");
4248         }
4249         panic("unknown initializer");
4250 }
4251
4252 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
4253  *  are elements [...] the remainder of the aggregate shall be initialized
4254  *  implicitly the same as objects that have static storage duration. */
4255 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4256                 ir_node *base_addr)
4257 {
4258         /* for unions we must NOT do anything for null initializers */
4259         ir_type *owner = get_entity_owner(entity);
4260         if (is_Union_type(owner)) {
4261                 return;
4262         }
4263
4264         ir_type *ent_type = get_entity_type(entity);
4265         /* create sub-initializers for a compound type */
4266         if (is_compound_type(ent_type)) {
4267                 unsigned n_members = get_compound_n_members(ent_type);
4268                 for (unsigned n = 0; n < n_members; ++n) {
4269                         ir_entity *member = get_compound_member(ent_type, n);
4270                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4271                                                                 member);
4272                         create_dynamic_null_initializer(member, dbgi, addr);
4273                 }
4274                 return;
4275         }
4276         if (is_Array_type(ent_type)) {
4277                 assert(has_array_upper_bound(ent_type, 0));
4278                 long n = get_array_upper_bound_int(ent_type, 0);
4279                 for (long i = 0; i < n; ++i) {
4280                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4281                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4282                         ir_node   *in[1]    = { cnst };
4283                         ir_entity *arrent   = get_array_element_entity(ent_type);
4284                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4285                                                         arrent);
4286                         create_dynamic_null_initializer(arrent, dbgi, addr);
4287                 }
4288                 return;
4289         }
4290
4291         ir_mode *value_mode = get_type_mode(ent_type);
4292         ir_node *node = new_Const_long(value_mode, 0);
4293
4294         /* is it a bitfield type? */
4295         if (is_Primitive_type(ent_type) &&
4296                         get_primitive_base_type(ent_type) != NULL) {
4297                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4298                 return;
4299         }
4300
4301         ir_node *mem    = get_store();
4302         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4303         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4304         set_store(proj_m);
4305 }
4306
4307 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4308                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4309 {
4310         switch(get_initializer_kind(initializer)) {
4311         case IR_INITIALIZER_NULL:
4312                 create_dynamic_null_initializer(entity, dbgi, base_addr);
4313                 return;
4314         case IR_INITIALIZER_CONST: {
4315                 ir_node *node     = get_initializer_const_value(initializer);
4316                 ir_type *ent_type = get_entity_type(entity);
4317
4318                 /* is it a bitfield type? */
4319                 if (is_Primitive_type(ent_type) &&
4320                                 get_primitive_base_type(ent_type) != NULL) {
4321                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4322                         return;
4323                 }
4324
4325                 assert(get_type_mode(type) == get_irn_mode(node));
4326                 ir_node *mem    = get_store();
4327                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4328                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4329                 set_store(proj_m);
4330                 return;
4331         }
4332         case IR_INITIALIZER_TARVAL: {
4333                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
4334                 ir_node   *cnst     = new_d_Const(dbgi, tv);
4335                 ir_type   *ent_type = get_entity_type(entity);
4336
4337                 /* is it a bitfield type? */
4338                 if (is_Primitive_type(ent_type) &&
4339                                 get_primitive_base_type(ent_type) != NULL) {
4340                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
4341                         return;
4342                 }
4343
4344                 assert(get_type_mode(type) == get_tarval_mode(tv));
4345                 ir_node *mem    = get_store();
4346                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4347                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4348                 set_store(proj_m);
4349                 return;
4350         }
4351         case IR_INITIALIZER_COMPOUND: {
4352                 assert(is_compound_type(type) || is_Array_type(type));
4353                 int n_members;
4354                 if (is_Array_type(type)) {
4355                         assert(has_array_upper_bound(type, 0));
4356                         n_members = get_array_upper_bound_int(type, 0);
4357                 } else {
4358                         n_members = get_compound_n_members(type);
4359                 }
4360
4361                 if (get_initializer_compound_n_entries(initializer)
4362                                 != (unsigned) n_members)
4363                         panic("initializer doesn't match compound type");
4364
4365                 for (int i = 0; i < n_members; ++i) {
4366                         ir_node   *addr;
4367                         ir_type   *irtype;
4368                         ir_entity *sub_entity;
4369                         if (is_Array_type(type)) {
4370                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4371                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4372                                 ir_node   *in[1]    = { cnst };
4373                                 irtype     = get_array_element_type(type);
4374                                 sub_entity = get_array_element_entity(type);
4375                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4376                                                        sub_entity);
4377                         } else {
4378                                 sub_entity = get_compound_member(type, i);
4379                                 irtype     = get_entity_type(sub_entity);
4380                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4381                                                              sub_entity);
4382                         }
4383
4384                         ir_initializer_t *sub_init
4385                                 = get_initializer_compound_value(initializer, i);
4386
4387                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4388                                                        addr);
4389                 }
4390                 return;
4391         }
4392         }
4393
4394         panic("invalid IR_INITIALIZER found");
4395 }
4396
4397 static void create_dynamic_initializer(ir_initializer_t *initializer,
4398                 dbg_info *dbgi, ir_entity *entity)
4399 {
4400         ir_node *frame     = get_irg_frame(current_ir_graph);
4401         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4402         ir_type *type      = get_entity_type(entity);
4403
4404         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4405 }
4406
4407 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4408                                      ir_entity *entity, type_t *type)
4409 {
4410         ir_node *memory = get_store();
4411         ir_node *nomem  = new_NoMem();
4412         ir_node *frame  = get_irg_frame(current_ir_graph);
4413         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4414
4415         if (initializer->kind == INITIALIZER_VALUE) {
4416                 initializer_value_t *initializer_value = &initializer->value;
4417
4418                 ir_node *value = expression_to_firm(initializer_value->value);
4419                 type = skip_typeref(type);
4420                 assign_value(dbgi, addr, type, value);
4421                 return;
4422         }
4423
4424         if (!is_constant_initializer(initializer)) {
4425                 bool old_initializer_use_bitfield_basetype
4426                         = initializer_use_bitfield_basetype;
4427                 initializer_use_bitfield_basetype = true;
4428                 ir_initializer_t *irinitializer
4429                         = create_ir_initializer(initializer, type);
4430                 initializer_use_bitfield_basetype
4431                         = old_initializer_use_bitfield_basetype;
4432
4433                 create_dynamic_initializer(irinitializer, dbgi, entity);
4434                 return;
4435         }
4436
4437         /* create the ir_initializer */
4438         ir_graph *const old_current_ir_graph = current_ir_graph;
4439         current_ir_graph = get_const_code_irg();
4440
4441         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4442
4443         assert(current_ir_graph == get_const_code_irg());
4444         current_ir_graph = old_current_ir_graph;
4445
4446         /* create a "template" entity which is copied to the entity on the stack */
4447         ident     *const id          = id_unique("initializer.%u");
4448         ir_type   *const irtype      = get_ir_type(type);
4449         ir_type   *const global_type = get_glob_type();
4450         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4451         set_entity_ld_ident(init_entity, id);
4452
4453         set_entity_visibility(init_entity, ir_visibility_private);
4454         add_entity_linkage(init_entity, IR_LINKAGE_CONSTANT);
4455
4456         set_entity_initializer(init_entity, irinitializer);
4457
4458         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4459         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4460
4461         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4462         set_store(copyb_mem);
4463 }
4464
4465 static void create_initializer_local_variable_entity(entity_t *entity)
4466 {
4467         assert(entity->kind == ENTITY_VARIABLE);
4468         initializer_t *initializer = entity->variable.initializer;
4469         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4470         ir_entity     *irentity    = entity->variable.v.entity;
4471         type_t        *type        = entity->declaration.type;
4472
4473         create_local_initializer(initializer, dbgi, irentity, type);
4474 }
4475
4476 static void create_variable_initializer(entity_t *entity)
4477 {
4478         assert(entity->kind == ENTITY_VARIABLE);
4479         initializer_t *initializer = entity->variable.initializer;
4480         if (initializer == NULL)
4481                 return;
4482
4483         declaration_kind_t declaration_kind
4484                 = (declaration_kind_t) entity->declaration.kind;
4485         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4486                 create_initializer_local_variable_entity(entity);
4487                 return;
4488         }
4489
4490         type_t            *type = entity->declaration.type;
4491         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4492
4493         if (initializer->kind == INITIALIZER_VALUE) {
4494                 initializer_value_t *initializer_value = &initializer->value;
4495                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4496
4497                 ir_node *value = expression_to_firm(initializer_value->value);
4498
4499                 type_t  *type = initializer_value->value->base.type;
4500                 ir_mode *mode = get_ir_mode_storage(type);
4501                 value = create_conv(dbgi, value, mode);
4502                 value = do_strict_conv(dbgi, value);
4503
4504                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4505                         set_value(entity->variable.v.value_number, value);
4506                 } else {
4507                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4508
4509                         ir_entity *irentity = entity->variable.v.entity;
4510
4511                         if (tq & TYPE_QUALIFIER_CONST
4512                                         && get_entity_owner(irentity) != get_tls_type()) {
4513                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4514                         }
4515                         set_atomic_ent_value(irentity, value);
4516                 }
4517         } else {
4518                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4519                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4520
4521                 ir_entity        *irentity        = entity->variable.v.entity;
4522                 ir_initializer_t *irinitializer
4523                         = create_ir_initializer(initializer, type);
4524
4525                 if (tq & TYPE_QUALIFIER_CONST) {
4526                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4527                 }
4528                 set_entity_initializer(irentity, irinitializer);
4529         }
4530 }
4531
4532 static void create_variable_length_array(entity_t *entity)
4533 {
4534         assert(entity->kind == ENTITY_VARIABLE);
4535         assert(entity->variable.initializer == NULL);
4536
4537         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4538         entity->variable.v.vla_base = NULL;
4539
4540         /* TODO: record VLA somewhere so we create the free node when we leave
4541          * it's scope */
4542 }
4543
4544 static void allocate_variable_length_array(entity_t *entity)
4545 {
4546         assert(entity->kind == ENTITY_VARIABLE);
4547         assert(entity->variable.initializer == NULL);
4548         assert(get_cur_block() != NULL);
4549
4550         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4551         type_t   *type      = entity->declaration.type;
4552         ir_type  *el_type   = get_ir_type(type->array.element_type);
4553
4554         /* make sure size_node is calculated */
4555         get_type_size_node(type);
4556         ir_node  *elems = type->array.size_node;
4557         ir_node  *mem   = get_store();
4558         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4559
4560         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4561         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4562         set_store(proj_m);
4563
4564         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4565         entity->variable.v.vla_base = addr;
4566 }
4567
4568 /**
4569  * Creates a Firm local variable from a declaration.
4570  */
4571 static void create_local_variable(entity_t *entity)
4572 {
4573         assert(entity->kind == ENTITY_VARIABLE);
4574         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4575
4576         bool needs_entity = entity->variable.address_taken;
4577         type_t *type = skip_typeref(entity->declaration.type);
4578
4579         /* is it a variable length array? */
4580         if (is_type_array(type) && !type->array.size_constant) {
4581                 create_variable_length_array(entity);
4582                 return;
4583         } else if (is_type_array(type) || is_type_compound(type)) {
4584                 needs_entity = true;
4585         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4586                 needs_entity = true;
4587         }
4588
4589         if (needs_entity) {
4590                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4591                 create_variable_entity(entity,
4592                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4593                                        frame_type);
4594         } else {
4595                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4596                 entity->variable.v.value_number = next_value_number_function;
4597                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4598                                         entity);
4599                 ++next_value_number_function;
4600         }
4601 }
4602
4603 static void create_local_static_variable(entity_t *entity)
4604 {
4605         assert(entity->kind == ENTITY_VARIABLE);
4606         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4607
4608         type_t   *type           = skip_typeref(entity->declaration.type);
4609         ir_type  *const var_type = entity->variable.thread_local ?
4610                 get_tls_type() : get_glob_type();
4611         ir_type  *const irtype   = get_ir_type(type);
4612         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4613
4614         size_t l = strlen(entity->base.symbol->string);
4615         char   buf[l + sizeof(".%u")];
4616         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4617         ident     *const id       = id_unique(buf);
4618         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4619
4620         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4621                 set_entity_volatility(irentity, volatility_is_volatile);
4622         }
4623
4624         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4625         entity->variable.v.entity = irentity;
4626
4627         set_entity_ld_ident(irentity, id);
4628         set_entity_visibility(irentity, ir_visibility_local);
4629
4630         ir_graph *const old_current_ir_graph = current_ir_graph;
4631         current_ir_graph = get_const_code_irg();
4632
4633         create_variable_initializer(entity);
4634
4635         assert(current_ir_graph == get_const_code_irg());
4636         current_ir_graph = old_current_ir_graph;
4637 }
4638
4639
4640
4641 static void return_statement_to_firm(return_statement_t *statement)
4642 {
4643         if (get_cur_block() == NULL)
4644                 return;
4645
4646         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4647         type_t   *type        = current_function_entity->declaration.type;
4648         ir_type  *func_irtype = get_ir_type(type);
4649
4650
4651         ir_node *in[1];
4652         int      in_len;
4653         if (get_method_n_ress(func_irtype) > 0) {
4654                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4655
4656                 if (statement->value != NULL) {
4657                         ir_node *node = expression_to_firm(statement->value);
4658                         if (!is_compound_type(res_type)) {
4659                                 type_t  *type = statement->value->base.type;
4660                                 ir_mode *mode = get_ir_mode_storage(type);
4661                                 node          = create_conv(dbgi, node, mode);
4662                                 node          = do_strict_conv(dbgi, node);
4663                         }
4664                         in[0] = node;
4665                 } else {
4666                         ir_mode *mode;
4667                         if (is_compound_type(res_type)) {
4668                                 mode = mode_P_data;
4669                         } else {
4670                                 mode = get_type_mode(res_type);
4671                         }
4672                         in[0] = new_Unknown(mode);
4673                 }
4674                 in_len = 1;
4675         } else {
4676                 /* build return_value for its side effects */
4677                 if (statement->value != NULL) {
4678                         expression_to_firm(statement->value);
4679                 }
4680                 in_len = 0;
4681         }
4682
4683         ir_node  *store = get_store();
4684         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4685
4686         ir_node *end_block = get_irg_end_block(current_ir_graph);
4687         add_immBlock_pred(end_block, ret);
4688
4689         set_cur_block(NULL);
4690 }
4691
4692 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4693 {
4694         if (get_cur_block() == NULL)
4695                 return NULL;
4696
4697         return expression_to_firm(statement->expression);
4698 }
4699
4700 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4701 {
4702         entity_t *entity = compound->scope.entities;
4703         for ( ; entity != NULL; entity = entity->base.next) {
4704                 if (!is_declaration(entity))
4705                         continue;
4706
4707                 create_local_declaration(entity);
4708         }
4709
4710         ir_node     *result    = NULL;
4711         statement_t *statement = compound->statements;
4712         for ( ; statement != NULL; statement = statement->base.next) {
4713                 if (statement->base.next == NULL
4714                                 && statement->kind == STATEMENT_EXPRESSION) {
4715                         result = expression_statement_to_firm(
4716                                         &statement->expression);
4717                         break;
4718                 }
4719                 statement_to_firm(statement);
4720         }
4721
4722         return result;
4723 }
4724
4725 static void create_global_variable(entity_t *entity)
4726 {
4727         ir_linkage    linkage    = IR_LINKAGE_DEFAULT;
4728         ir_visibility visibility = ir_visibility_default;
4729         ir_entity    *irentity;
4730         assert(entity->kind == ENTITY_VARIABLE);
4731
4732         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4733         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4734         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4735         case STORAGE_CLASS_NONE:
4736                 visibility = ir_visibility_default;
4737                 /* uninitialized globals get merged in C */
4738                 if (entity->variable.initializer == NULL)
4739                         linkage |= IR_LINKAGE_MERGE;
4740                 break;
4741         case STORAGE_CLASS_TYPEDEF:
4742         case STORAGE_CLASS_AUTO:
4743         case STORAGE_CLASS_REGISTER:
4744                 panic("invalid storage class for global var");
4745         }
4746
4747         ir_type *var_type = get_glob_type();
4748         if (entity->variable.thread_local) {
4749                 var_type = get_tls_type();
4750                 /* LINKAGE_MERGE not supported by current linkers */
4751                 linkage &= ~IR_LINKAGE_MERGE;
4752         }
4753         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4754         irentity = entity->variable.v.entity;
4755         add_entity_linkage(irentity, linkage);
4756         set_entity_visibility(irentity, visibility);
4757 }
4758
4759 static void create_local_declaration(entity_t *entity)
4760 {
4761         assert(is_declaration(entity));
4762
4763         /* construct type */
4764         (void) get_ir_type(entity->declaration.type);
4765         if (entity->base.symbol == NULL) {
4766                 return;
4767         }
4768
4769         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4770         case STORAGE_CLASS_STATIC:
4771                 if (entity->kind == ENTITY_FUNCTION) {
4772                         (void)get_function_entity(entity, NULL);
4773                 } else {
4774                         create_local_static_variable(entity);
4775                 }
4776                 return;
4777         case STORAGE_CLASS_EXTERN:
4778                 if (entity->kind == ENTITY_FUNCTION) {
4779                         assert(entity->function.statement == NULL);
4780                         (void)get_function_entity(entity, NULL);
4781                 } else {
4782                         create_global_variable(entity);
4783                         create_variable_initializer(entity);
4784                 }
4785                 return;
4786         case STORAGE_CLASS_NONE:
4787         case STORAGE_CLASS_AUTO:
4788         case STORAGE_CLASS_REGISTER:
4789                 if (entity->kind == ENTITY_FUNCTION) {
4790                         if (entity->function.statement != NULL) {
4791                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4792                                 (void)get_function_entity(entity, owner);
4793                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4794                                 enqueue_inner_function(entity);
4795                         } else {
4796                                 (void)get_function_entity(entity, NULL);
4797                         }
4798                 } else {
4799                         create_local_variable(entity);
4800                 }
4801                 return;
4802         case STORAGE_CLASS_TYPEDEF:
4803                 break;
4804         }
4805         panic("invalid storage class found");
4806 }
4807
4808 static void initialize_local_declaration(entity_t *entity)
4809 {
4810         if (entity->base.symbol == NULL)
4811                 return;
4812
4813         // no need to emit code in dead blocks
4814         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4815                         && get_cur_block() == NULL)
4816                 return;
4817
4818         switch ((declaration_kind_t) entity->declaration.kind) {
4819         case DECLARATION_KIND_LOCAL_VARIABLE:
4820         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4821                 create_variable_initializer(entity);
4822                 return;
4823
4824         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4825                 allocate_variable_length_array(entity);
4826                 return;
4827
4828         case DECLARATION_KIND_COMPOUND_MEMBER:
4829         case DECLARATION_KIND_GLOBAL_VARIABLE:
4830         case DECLARATION_KIND_FUNCTION:
4831         case DECLARATION_KIND_INNER_FUNCTION:
4832                 return;
4833
4834         case DECLARATION_KIND_PARAMETER:
4835         case DECLARATION_KIND_PARAMETER_ENTITY:
4836                 panic("can't initialize parameters");
4837
4838         case DECLARATION_KIND_UNKNOWN:
4839                 panic("can't initialize unknown declaration");
4840         }
4841         panic("invalid declaration kind");
4842 }
4843
4844 static void declaration_statement_to_firm(declaration_statement_t *statement)
4845 {
4846         entity_t *entity = statement->declarations_begin;
4847         if (entity == NULL)
4848                 return;
4849
4850         entity_t *const last = statement->declarations_end;
4851         for ( ;; entity = entity->base.next) {
4852                 if (is_declaration(entity)) {
4853                         initialize_local_declaration(entity);
4854                 } else if (entity->kind == ENTITY_TYPEDEF) {
4855                         /* §6.7.7:3  Any array size expressions associated with variable length
4856                          * array declarators are evaluated each time the declaration of the
4857                          * typedef name is reached in the order of execution. */
4858                         type_t *const type = skip_typeref(entity->typedefe.type);
4859                         if (is_type_array(type) && type->array.is_vla)
4860                                 get_vla_size(&type->array);
4861                 }
4862                 if (entity == last)
4863                         break;
4864         }
4865 }
4866
4867 static void if_statement_to_firm(if_statement_t *statement)
4868 {
4869         ir_node *cur_block = get_cur_block();
4870
4871         ir_node *fallthrough_block = NULL;
4872
4873         /* the true (blocks) */
4874         ir_node *true_block = NULL;
4875         if (statement->true_statement != NULL) {
4876                 true_block = new_immBlock();
4877                 set_cur_block(true_block);
4878                 statement_to_firm(statement->true_statement);
4879                 if (get_cur_block() != NULL) {
4880                         ir_node *jmp = new_Jmp();
4881                         if (fallthrough_block == NULL)
4882                                 fallthrough_block = new_immBlock();
4883                         add_immBlock_pred(fallthrough_block, jmp);
4884                 }
4885         }
4886
4887         /* the false (blocks) */
4888         ir_node *false_block = NULL;
4889         if (statement->false_statement != NULL) {
4890                 false_block = new_immBlock();
4891                 set_cur_block(false_block);
4892
4893                 statement_to_firm(statement->false_statement);
4894                 if (get_cur_block() != NULL) {
4895                         ir_node *jmp = new_Jmp();
4896                         if (fallthrough_block == NULL)
4897                                 fallthrough_block = new_immBlock();
4898                         add_immBlock_pred(fallthrough_block, jmp);
4899                 }
4900         }
4901
4902         /* create the condition */
4903         if (cur_block != NULL) {
4904                 if (true_block == NULL || false_block == NULL) {
4905                         if (fallthrough_block == NULL)
4906                                 fallthrough_block = new_immBlock();
4907                         if (true_block == NULL)
4908                                 true_block = fallthrough_block;
4909                         if (false_block == NULL)
4910                                 false_block = fallthrough_block;
4911                 }
4912
4913                 set_cur_block(cur_block);
4914                 create_condition_evaluation(statement->condition, true_block,
4915                                             false_block);
4916         }
4917
4918         mature_immBlock(true_block);
4919         if (false_block != fallthrough_block && false_block != NULL) {
4920                 mature_immBlock(false_block);
4921         }
4922         if (fallthrough_block != NULL) {
4923                 mature_immBlock(fallthrough_block);
4924         }
4925
4926         set_cur_block(fallthrough_block);
4927 }
4928
4929 static void while_statement_to_firm(while_statement_t *statement)
4930 {
4931         /* create the header block */
4932         ir_node *header_block = new_immBlock();
4933         if (get_cur_block() != NULL) {
4934                 ir_node *const jmp = new_Jmp();
4935                 add_immBlock_pred(header_block, jmp);
4936         }
4937
4938         /* the loop body */
4939         ir_node *old_continue_label = continue_label;
4940         ir_node *old_break_label    = break_label;
4941         continue_label              = header_block;
4942         break_label                 = NULL;
4943
4944         ir_node *body_block = new_immBlock();
4945         set_cur_block(body_block);
4946         statement_to_firm(statement->body);
4947         ir_node *false_block = break_label;
4948
4949         assert(continue_label == header_block);
4950         continue_label = old_continue_label;
4951         break_label    = old_break_label;
4952
4953         if (get_cur_block() != NULL) {
4954                 ir_node *const jmp = new_Jmp();
4955                 add_immBlock_pred(header_block, jmp);
4956         }
4957
4958         /* shortcut for while(true) */
4959         if (is_constant_expression(statement->condition)
4960                         && fold_constant_to_bool(statement->condition) != 0) {
4961                 set_cur_block(header_block);
4962                 ir_node *header_jmp = new_Jmp();
4963                 add_immBlock_pred(body_block, header_jmp);
4964
4965                 keep_alive(body_block);
4966                 keep_all_memory(body_block);
4967                 set_cur_block(body_block);
4968         } else {
4969                 if (false_block == NULL) {
4970                         false_block = new_immBlock();
4971                 }
4972
4973                 /* create the condition */
4974                 set_cur_block(header_block);
4975
4976                 create_condition_evaluation(statement->condition, body_block,
4977                                             false_block);
4978         }
4979
4980         mature_immBlock(body_block);
4981         mature_immBlock(header_block);
4982         if (false_block != NULL) {
4983                 mature_immBlock(false_block);
4984         }
4985
4986         set_cur_block(false_block);
4987 }
4988
4989 static void do_while_statement_to_firm(do_while_statement_t *statement)
4990 {
4991         ir_node *jmp = NULL;
4992         if (get_cur_block() != NULL) {
4993                 jmp = new_Jmp();
4994         }
4995
4996         /* create the header block */
4997         ir_node *header_block = new_immBlock();
4998
4999         /* the loop body */
5000         ir_node *body_block = new_immBlock();
5001         if (jmp != NULL) {
5002                 add_immBlock_pred(body_block, jmp);
5003         }
5004
5005         ir_node *old_continue_label = continue_label;
5006         ir_node *old_break_label    = break_label;
5007         continue_label              = header_block;
5008         break_label                 = NULL;
5009
5010         set_cur_block(body_block);
5011         statement_to_firm(statement->body);
5012         ir_node *false_block = break_label;
5013
5014         assert(continue_label == header_block);
5015         continue_label = old_continue_label;
5016         break_label    = old_break_label;
5017
5018         if (get_cur_block() != NULL) {
5019                 ir_node *body_jmp = new_Jmp();
5020                 add_immBlock_pred(header_block, body_jmp);
5021                 mature_immBlock(header_block);
5022         }
5023
5024         if (false_block == NULL) {
5025                 false_block = new_immBlock();
5026         }
5027
5028         /* create the condition */
5029         set_cur_block(header_block);
5030
5031         create_condition_evaluation(statement->condition, body_block, false_block);
5032         mature_immBlock(body_block);
5033         mature_immBlock(header_block);
5034         mature_immBlock(false_block);
5035
5036         set_cur_block(false_block);
5037 }
5038
5039 static void for_statement_to_firm(for_statement_t *statement)
5040 {
5041         ir_node *jmp = NULL;
5042
5043         /* create declarations */
5044         entity_t *entity = statement->scope.entities;
5045         for ( ; entity != NULL; entity = entity->base.next) {
5046                 if (!is_declaration(entity))
5047                         continue;
5048
5049                 create_local_declaration(entity);
5050         }
5051
5052         if (get_cur_block() != NULL) {
5053                 entity = statement->scope.entities;
5054                 for ( ; entity != NULL; entity = entity->base.next) {
5055                         if (!is_declaration(entity))
5056                                 continue;
5057
5058                         initialize_local_declaration(entity);
5059                 }
5060
5061                 if (statement->initialisation != NULL) {
5062                         expression_to_firm(statement->initialisation);
5063                 }
5064
5065                 jmp = new_Jmp();
5066         }
5067
5068
5069         /* create the step block */
5070         ir_node *const step_block = new_immBlock();
5071         set_cur_block(step_block);
5072         if (statement->step != NULL) {
5073                 expression_to_firm(statement->step);
5074         }
5075         ir_node *const step_jmp = new_Jmp();
5076
5077         /* create the header block */
5078         ir_node *const header_block = new_immBlock();
5079         set_cur_block(header_block);
5080         if (jmp != NULL) {
5081                 add_immBlock_pred(header_block, jmp);
5082         }
5083         add_immBlock_pred(header_block, step_jmp);
5084
5085         /* the false block */
5086         ir_node *const false_block = new_immBlock();
5087
5088         /* the loop body */
5089         ir_node *body_block;
5090         if (statement->body != NULL) {
5091                 ir_node *const old_continue_label = continue_label;
5092                 ir_node *const old_break_label    = break_label;
5093                 continue_label = step_block;
5094                 break_label    = false_block;
5095
5096                 body_block = new_immBlock();
5097                 set_cur_block(body_block);
5098                 statement_to_firm(statement->body);
5099
5100                 assert(continue_label == step_block);
5101                 assert(break_label    == false_block);
5102                 continue_label = old_continue_label;
5103                 break_label    = old_break_label;
5104
5105                 if (get_cur_block() != NULL) {
5106                         jmp = new_Jmp();
5107                         add_immBlock_pred(step_block, jmp);
5108                 }
5109         } else {
5110                 body_block = step_block;
5111         }
5112
5113         /* create the condition */
5114         set_cur_block(header_block);
5115         if (statement->condition != NULL) {
5116                 create_condition_evaluation(statement->condition, body_block,
5117                                             false_block);
5118         } else {
5119                 keep_alive(header_block);
5120                 keep_all_memory(header_block);
5121                 jmp = new_Jmp();
5122                 add_immBlock_pred(body_block, jmp);
5123         }
5124
5125         mature_immBlock(body_block);
5126         mature_immBlock(false_block);
5127         mature_immBlock(step_block);
5128         mature_immBlock(header_block);
5129         mature_immBlock(false_block);
5130
5131         set_cur_block(false_block);
5132 }
5133
5134 static void create_jump_statement(const statement_t *statement,
5135                                   ir_node *target_block)
5136 {
5137         if (get_cur_block() == NULL)
5138                 return;
5139
5140         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5141         ir_node  *jump = new_d_Jmp(dbgi);
5142         add_immBlock_pred(target_block, jump);
5143
5144         set_cur_block(NULL);
5145 }
5146
5147 static ir_node *get_break_label(void)
5148 {
5149         if (break_label == NULL) {
5150                 break_label = new_immBlock();
5151         }
5152         return break_label;
5153 }
5154
5155 static void switch_statement_to_firm(switch_statement_t *statement)
5156 {
5157         ir_node  *first_block = NULL;
5158         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
5159         ir_node  *cond        = NULL;
5160
5161         if (get_cur_block() != NULL) {
5162                 ir_node *expression = expression_to_firm(statement->expression);
5163                 cond                = new_d_Cond(dbgi, expression);
5164                 first_block         = get_cur_block();
5165         }
5166
5167         set_cur_block(NULL);
5168
5169         ir_node *const old_switch_cond       = current_switch_cond;
5170         ir_node *const old_break_label       = break_label;
5171         const bool     old_saw_default_label = saw_default_label;
5172         saw_default_label                    = false;
5173         current_switch_cond                  = cond;
5174         break_label                          = NULL;
5175         switch_statement_t *const old_switch = current_switch;
5176         current_switch                       = statement;
5177
5178         /* determine a free number for the default label */
5179         unsigned long num_cases       = 0;
5180         long          default_proj_nr = 0;
5181         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5182                 if (l->expression == NULL) {
5183                         /* default case */
5184                         continue;
5185                 }
5186                 if (l->last_case >= l->first_case)
5187                         num_cases += l->last_case - l->first_case + 1;
5188                 if (l->last_case > default_proj_nr)
5189                         default_proj_nr = l->last_case;
5190         }
5191
5192         if (default_proj_nr == INT_MAX) {
5193                 /* Bad: an overflow will occur, we cannot be sure that the
5194                  * maximum + 1 is a free number. Scan the values a second
5195                  * time to find a free number.
5196                  */
5197                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
5198
5199                 memset(bits, 0, (num_cases + 7) >> 3);
5200                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5201                         if (l->expression == NULL) {
5202                                 /* default case */
5203                                 continue;
5204                         }
5205                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
5206                         if (start < num_cases && l->last_case >= 0) {
5207                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
5208                                         (unsigned long)l->last_case : num_cases - 1;
5209                                 for (unsigned long cns = start; cns <= end; ++cns) {
5210                                         bits[cns >> 3] |= (1 << (cns & 7));
5211                                 }
5212                         }
5213                 }
5214                 /* We look at the first num_cases constants:
5215                  * Either they are dense, so we took the last (num_cases)
5216                  * one, or they are not dense, so we will find one free
5217                  * there...
5218                  */
5219                 unsigned long i;
5220                 for (i = 0; i < num_cases; ++i)
5221                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
5222                                 break;
5223
5224                 free(bits);
5225                 default_proj_nr = i;
5226         } else {
5227                 ++default_proj_nr;
5228         }
5229         statement->default_proj_nr = default_proj_nr;
5230         /* safety check: cond might already be folded to a Bad */
5231         if (cond != NULL && is_Cond(cond)) {
5232                 set_Cond_default_proj(cond, default_proj_nr);
5233         }
5234
5235         if (statement->body != NULL) {
5236                 statement_to_firm(statement->body);
5237         }
5238
5239         if (get_cur_block() != NULL) {
5240                 ir_node *jmp = new_Jmp();
5241                 add_immBlock_pred(get_break_label(), jmp);
5242         }
5243
5244         if (!saw_default_label && first_block != NULL) {
5245                 set_cur_block(first_block);
5246                 ir_node *const proj = new_d_Proj(dbgi, cond, mode_X, default_proj_nr);
5247                 add_immBlock_pred(get_break_label(), proj);
5248         }
5249
5250         if (break_label != NULL) {
5251                 mature_immBlock(break_label);
5252         }
5253         set_cur_block(break_label);
5254
5255         assert(current_switch_cond == cond);
5256         current_switch      = old_switch;
5257         current_switch_cond = old_switch_cond;
5258         break_label         = old_break_label;
5259         saw_default_label   = old_saw_default_label;
5260 }
5261
5262 static void case_label_to_firm(const case_label_statement_t *statement)
5263 {
5264         if (statement->is_empty_range)
5265                 return;
5266
5267         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5268
5269         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
5270
5271         ir_node *proj;
5272         ir_node *block = new_immBlock();
5273
5274         if (current_switch_cond != NULL) {
5275                 set_cur_block(get_nodes_block(current_switch_cond));
5276                 if (statement->expression != NULL) {
5277                         long pn     = statement->first_case;
5278                         long end_pn = statement->last_case;
5279                         assert(pn <= end_pn);
5280                         /* create jumps for all cases in the given range */
5281                         do {
5282                                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
5283                                 add_immBlock_pred(block, proj);
5284                         } while (pn++ < end_pn);
5285                 } else {
5286                         saw_default_label = true;
5287                         proj = new_d_Proj(dbgi, current_switch_cond, mode_X,
5288                                           current_switch->default_proj_nr);
5289
5290                         add_immBlock_pred(block, proj);
5291                 }
5292         }
5293
5294         if (fallthrough != NULL) {
5295                 add_immBlock_pred(block, fallthrough);
5296         }
5297         mature_immBlock(block);
5298         set_cur_block(block);
5299
5300         if (statement->statement != NULL) {
5301                 statement_to_firm(statement->statement);
5302         }
5303 }
5304
5305 static void label_to_firm(const label_statement_t *statement)
5306 {
5307         ir_node *block = get_label_block(statement->label);
5308
5309         if (get_cur_block() != NULL) {
5310                 ir_node *jmp = new_Jmp();
5311                 add_immBlock_pred(block, jmp);
5312         }
5313
5314         set_cur_block(block);
5315         keep_alive(block);
5316         keep_all_memory(block);
5317
5318         if (statement->statement != NULL) {
5319                 statement_to_firm(statement->statement);
5320         }
5321 }
5322
5323 static void goto_to_firm(const goto_statement_t *statement)
5324 {
5325         if (get_cur_block() == NULL)
5326                 return;
5327
5328         if (statement->expression) {
5329                 ir_node  *irn  = expression_to_firm(statement->expression);
5330                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5331                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
5332
5333                 set_irn_link(ijmp, ijmp_list);
5334                 ijmp_list = ijmp;
5335         } else {
5336                 ir_node *block = get_label_block(statement->label);
5337                 ir_node *jmp   = new_Jmp();
5338                 add_immBlock_pred(block, jmp);
5339         }
5340         set_cur_block(NULL);
5341 }
5342
5343 static void asm_statement_to_firm(const asm_statement_t *statement)
5344 {
5345         bool needs_memory = false;
5346
5347         if (statement->is_volatile) {
5348                 needs_memory = true;
5349         }
5350
5351         size_t         n_clobbers = 0;
5352         asm_clobber_t *clobber    = statement->clobbers;
5353         for ( ; clobber != NULL; clobber = clobber->next) {
5354                 const char *clobber_str = clobber->clobber.begin;
5355
5356                 if (!be_is_valid_clobber(clobber_str)) {
5357                         errorf(&statement->base.source_position,
5358                                    "invalid clobber '%s' specified", clobber->clobber);
5359                         continue;
5360                 }
5361
5362                 if (strcmp(clobber_str, "memory") == 0) {
5363                         needs_memory = true;
5364                         continue;
5365                 }
5366
5367                 ident *id = new_id_from_str(clobber_str);
5368                 obstack_ptr_grow(&asm_obst, id);
5369                 ++n_clobbers;
5370         }
5371         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5372         ident **clobbers = NULL;
5373         if (n_clobbers > 0) {
5374                 clobbers = obstack_finish(&asm_obst);
5375         }
5376
5377         size_t n_inputs  = 0;
5378         asm_argument_t *argument = statement->inputs;
5379         for ( ; argument != NULL; argument = argument->next)
5380                 n_inputs++;
5381         size_t n_outputs = 0;
5382         argument = statement->outputs;
5383         for ( ; argument != NULL; argument = argument->next)
5384                 n_outputs++;
5385
5386         unsigned next_pos = 0;
5387
5388         ir_node *ins[n_inputs + n_outputs + 1];
5389         size_t   in_size = 0;
5390
5391         ir_asm_constraint tmp_in_constraints[n_outputs];
5392
5393         const expression_t *out_exprs[n_outputs];
5394         ir_node            *out_addrs[n_outputs];
5395         size_t              out_size = 0;
5396
5397         argument = statement->outputs;
5398         for ( ; argument != NULL; argument = argument->next) {
5399                 const char *constraints = argument->constraints.begin;
5400                 asm_constraint_flags_t asm_flags
5401                         = be_parse_asm_constraints(constraints);
5402
5403                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5404                         warningf(&statement->base.source_position,
5405                                "some constraints in '%s' are not supported", constraints);
5406                 }
5407                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5408                         errorf(&statement->base.source_position,
5409                                "some constraints in '%s' are invalid", constraints);
5410                         continue;
5411                 }
5412                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5413                         errorf(&statement->base.source_position,
5414                                "no write flag specified for output constraints '%s'",
5415                                constraints);
5416                         continue;
5417                 }
5418
5419                 unsigned pos = next_pos++;
5420                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5421                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5422                         expression_t *expr = argument->expression;
5423                         ir_node      *addr = expression_to_addr(expr);
5424                         /* in+output, construct an artifical same_as constraint on the
5425                          * input */
5426                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5427                                 char     buf[64];
5428                                 ir_node *value = get_value_from_lvalue(expr, addr);
5429
5430                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5431
5432                                 ir_asm_constraint constraint;
5433                                 constraint.pos              = pos;
5434                                 constraint.constraint       = new_id_from_str(buf);
5435                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5436                                 tmp_in_constraints[in_size] = constraint;
5437                                 ins[in_size] = value;
5438
5439                                 ++in_size;
5440                         }
5441
5442                         out_exprs[out_size] = expr;
5443                         out_addrs[out_size] = addr;
5444                         ++out_size;
5445                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5446                         /* pure memory ops need no input (but we have to make sure we
5447                          * attach to the memory) */
5448                         assert(! (asm_flags &
5449                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5450                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5451                         needs_memory = true;
5452
5453                         /* we need to attach the address to the inputs */
5454                         expression_t *expr = argument->expression;
5455
5456                         ir_asm_constraint constraint;
5457                         constraint.pos              = pos;
5458                         constraint.constraint       = new_id_from_str(constraints);
5459                         constraint.mode             = NULL;
5460                         tmp_in_constraints[in_size] = constraint;
5461
5462                         ins[in_size]          = expression_to_addr(expr);
5463                         ++in_size;
5464                         continue;
5465                 } else {
5466                         errorf(&statement->base.source_position,
5467                                "only modifiers but no place set in constraints '%s'",
5468                                constraints);
5469                         continue;
5470                 }
5471
5472                 ir_asm_constraint constraint;
5473                 constraint.pos        = pos;
5474                 constraint.constraint = new_id_from_str(constraints);
5475                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5476
5477                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5478         }
5479         assert(obstack_object_size(&asm_obst)
5480                         == out_size * sizeof(ir_asm_constraint));
5481         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5482
5483
5484         obstack_grow(&asm_obst, tmp_in_constraints,
5485                      in_size * sizeof(tmp_in_constraints[0]));
5486         /* find and count input and output arguments */
5487         argument = statement->inputs;
5488         for ( ; argument != NULL; argument = argument->next) {
5489                 const char *constraints = argument->constraints.begin;
5490                 asm_constraint_flags_t asm_flags
5491                         = be_parse_asm_constraints(constraints);
5492
5493                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5494                         errorf(&statement->base.source_position,
5495                                "some constraints in '%s' are not supported", constraints);
5496                         continue;
5497                 }
5498                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5499                         errorf(&statement->base.source_position,
5500                                "some constraints in '%s' are invalid", constraints);
5501                         continue;
5502                 }
5503                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5504                         errorf(&statement->base.source_position,
5505                                "write flag specified for input constraints '%s'",
5506                                constraints);
5507                         continue;
5508                 }
5509
5510                 ir_node *input;
5511                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5512                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5513                         /* we can treat this as "normal" input */
5514                         input = expression_to_firm(argument->expression);
5515                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5516                         /* pure memory ops need no input (but we have to make sure we
5517                          * attach to the memory) */
5518                         assert(! (asm_flags &
5519                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5520                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5521                         needs_memory = true;
5522                         input = expression_to_addr(argument->expression);
5523                 } else {
5524                         errorf(&statement->base.source_position,
5525                                "only modifiers but no place set in constraints '%s'",
5526                                constraints);
5527                         continue;
5528                 }
5529
5530                 ir_asm_constraint constraint;
5531                 constraint.pos        = next_pos++;
5532                 constraint.constraint = new_id_from_str(constraints);
5533                 constraint.mode       = get_irn_mode(input);
5534
5535                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5536                 ins[in_size++] = input;
5537         }
5538
5539         if (needs_memory) {
5540                 ir_asm_constraint constraint;
5541                 constraint.pos        = next_pos++;
5542                 constraint.constraint = new_id_from_str("");
5543                 constraint.mode       = mode_M;
5544
5545                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5546                 ins[in_size++] = get_store();
5547         }
5548
5549         assert(obstack_object_size(&asm_obst)
5550                         == in_size * sizeof(ir_asm_constraint));
5551         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5552
5553         /* create asm node */
5554         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5555
5556         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5557
5558         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5559                                   out_size, output_constraints,
5560                                   n_clobbers, clobbers, asm_text);
5561
5562         if (statement->is_volatile) {
5563                 set_irn_pinned(node, op_pin_state_pinned);
5564         } else {
5565                 set_irn_pinned(node, op_pin_state_floats);
5566         }
5567
5568         /* create output projs & connect them */
5569         if (needs_memory) {
5570                 ir_node *projm = new_Proj(node, mode_M, out_size);
5571                 set_store(projm);
5572         }
5573
5574         size_t i;
5575         for (i = 0; i < out_size; ++i) {
5576                 const expression_t *out_expr = out_exprs[i];
5577                 long                pn       = i;
5578                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5579                 ir_node            *proj     = new_Proj(node, mode, pn);
5580                 ir_node            *addr     = out_addrs[i];
5581
5582                 set_value_for_expression_addr(out_expr, proj, addr);
5583         }
5584 }
5585
5586 static void     ms_try_statement_to_firm(ms_try_statement_t *statement)
5587 {
5588         statement_to_firm(statement->try_statement);
5589         warningf(&statement->base.source_position, "structured exception handling ignored");
5590 }
5591
5592 static void     leave_statement_to_firm(leave_statement_t *statement)
5593 {
5594         errorf(&statement->base.source_position, "__leave not supported yet");
5595 }
5596
5597 /**
5598  * Transform a statement.
5599  */
5600 static void statement_to_firm(statement_t *statement)
5601 {
5602 #ifndef NDEBUG
5603         assert(!statement->base.transformed);
5604         statement->base.transformed = true;
5605 #endif
5606
5607         switch (statement->kind) {
5608         case STATEMENT_INVALID:
5609                 panic("invalid statement found");
5610         case STATEMENT_EMPTY:
5611                 /* nothing */
5612                 return;
5613         case STATEMENT_COMPOUND:
5614                 compound_statement_to_firm(&statement->compound);
5615                 return;
5616         case STATEMENT_RETURN:
5617                 return_statement_to_firm(&statement->returns);
5618                 return;
5619         case STATEMENT_EXPRESSION:
5620                 expression_statement_to_firm(&statement->expression);
5621                 return;
5622         case STATEMENT_IF:
5623                 if_statement_to_firm(&statement->ifs);
5624                 return;
5625         case STATEMENT_WHILE:
5626                 while_statement_to_firm(&statement->whiles);
5627                 return;
5628         case STATEMENT_DO_WHILE:
5629                 do_while_statement_to_firm(&statement->do_while);
5630                 return;
5631         case STATEMENT_DECLARATION:
5632                 declaration_statement_to_firm(&statement->declaration);
5633                 return;
5634         case STATEMENT_BREAK:
5635                 create_jump_statement(statement, get_break_label());
5636                 return;
5637         case STATEMENT_CONTINUE:
5638                 create_jump_statement(statement, continue_label);
5639                 return;
5640         case STATEMENT_SWITCH:
5641                 switch_statement_to_firm(&statement->switchs);
5642                 return;
5643         case STATEMENT_CASE_LABEL:
5644                 case_label_to_firm(&statement->case_label);
5645                 return;
5646         case STATEMENT_FOR:
5647                 for_statement_to_firm(&statement->fors);
5648                 return;
5649         case STATEMENT_LABEL:
5650                 label_to_firm(&statement->label);
5651                 return;
5652         case STATEMENT_GOTO:
5653                 goto_to_firm(&statement->gotos);
5654                 return;
5655         case STATEMENT_ASM:
5656                 asm_statement_to_firm(&statement->asms);
5657                 return;
5658         case STATEMENT_MS_TRY:
5659                 ms_try_statement_to_firm(&statement->ms_try);
5660                 return;
5661         case STATEMENT_LEAVE:
5662                 leave_statement_to_firm(&statement->leave);
5663                 return;
5664         }
5665         panic("statement not implemented");
5666 }
5667
5668 static int count_local_variables(const entity_t *entity,
5669                                  const entity_t *const last)
5670 {
5671         int count = 0;
5672         entity_t const *const end = last != NULL ? last->base.next : NULL;
5673         for (; entity != end; entity = entity->base.next) {
5674                 type_t *type;
5675                 bool    address_taken;
5676
5677                 if (entity->kind == ENTITY_VARIABLE) {
5678                         type          = skip_typeref(entity->declaration.type);
5679                         address_taken = entity->variable.address_taken;
5680                 } else if (entity->kind == ENTITY_PARAMETER) {
5681                         type          = skip_typeref(entity->declaration.type);
5682                         address_taken = entity->parameter.address_taken;
5683                 } else {
5684                         continue;
5685                 }
5686
5687                 if (!address_taken && is_type_scalar(type))
5688                         ++count;
5689         }
5690         return count;
5691 }
5692
5693 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5694 {
5695         int *const count = env;
5696
5697         switch (stmt->kind) {
5698         case STATEMENT_DECLARATION: {
5699                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5700                 *count += count_local_variables(decl_stmt->declarations_begin,
5701                                 decl_stmt->declarations_end);
5702                 break;
5703         }
5704
5705         case STATEMENT_FOR:
5706                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5707                 break;
5708
5709         default:
5710                 break;
5711         }
5712 }
5713
5714 /**
5715  * Return the number of local (alias free) variables used by a function.
5716  */
5717 static int get_function_n_local_vars(entity_t *entity)
5718 {
5719         const function_t *function = &entity->function;
5720         int count = 0;
5721
5722         /* count parameters */
5723         count += count_local_variables(function->parameters.entities, NULL);
5724
5725         /* count local variables declared in body */
5726         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5727         return count;
5728 }
5729
5730 /**
5731  * Build Firm code for the parameters of a function.
5732  */
5733 static void initialize_function_parameters(entity_t *entity)
5734 {
5735         assert(entity->kind == ENTITY_FUNCTION);
5736         ir_graph *irg             = current_ir_graph;
5737         ir_node  *args            = get_irg_args(irg);
5738         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5739         int      first_param_nr   = 0;
5740
5741         if (entity->function.need_closure) {
5742                 /* add an extra parameter for the static link */
5743                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5744                 ++first_param_nr;
5745         }
5746
5747         int       n         = 0;
5748         entity_t *parameter = entity->function.parameters.entities;
5749         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5750                 if (parameter->kind != ENTITY_PARAMETER)
5751                         continue;
5752
5753                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5754                 type_t *type = skip_typeref(parameter->declaration.type);
5755
5756                 bool needs_entity = parameter->parameter.address_taken;
5757                 assert(!is_type_array(type));
5758                 if (is_type_compound(type)) {
5759                         needs_entity = true;
5760                 }
5761
5762                 if (needs_entity) {
5763                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5764                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5765                         set_entity_ident(entity, id);
5766
5767                         parameter->declaration.kind
5768                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5769                         parameter->parameter.v.entity = entity;
5770                         continue;
5771                 }
5772
5773                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5774                 ir_mode *param_mode   = get_type_mode(param_irtype);
5775
5776                 long     pn    = n + first_param_nr;
5777                 ir_node *value = new_r_Proj(args, param_mode, pn);
5778
5779                 ir_mode *mode = get_ir_mode_storage(type);
5780                 value = create_conv(NULL, value, mode);
5781                 value = do_strict_conv(NULL, value);
5782
5783                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5784                 parameter->parameter.v.value_number = next_value_number_function;
5785                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5786                                         parameter);
5787                 ++next_value_number_function;
5788
5789                 set_value(parameter->parameter.v.value_number, value);
5790         }
5791 }
5792
5793 /**
5794  * Handle additional decl modifiers for IR-graphs
5795  *
5796  * @param irg            the IR-graph
5797  * @param dec_modifiers  additional modifiers
5798  */
5799 static void handle_decl_modifier_irg(ir_graph_ptr irg,
5800                                      decl_modifiers_t decl_modifiers)
5801 {
5802         if (decl_modifiers & DM_RETURNS_TWICE) {
5803                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5804                 add_irg_additional_properties(irg, mtp_property_returns_twice);
5805         }
5806         if (decl_modifiers & DM_NORETURN) {
5807                 /* TRUE if the declaration includes the Microsoft
5808                    __declspec(noreturn) specifier. */
5809                 add_irg_additional_properties(irg, mtp_property_noreturn);
5810         }
5811         if (decl_modifiers & DM_NOTHROW) {
5812                 /* TRUE if the declaration includes the Microsoft
5813                    __declspec(nothrow) specifier. */
5814                 add_irg_additional_properties(irg, mtp_property_nothrow);
5815         }
5816         if (decl_modifiers & DM_NAKED) {
5817                 /* TRUE if the declaration includes the Microsoft
5818                    __declspec(naked) specifier. */
5819                 add_irg_additional_properties(irg, mtp_property_naked);
5820         }
5821         if (decl_modifiers & DM_FORCEINLINE) {
5822                 /* TRUE if the declaration includes the
5823                    Microsoft __forceinline specifier. */
5824                 set_irg_inline_property(irg, irg_inline_forced);
5825         }
5826         if (decl_modifiers & DM_NOINLINE) {
5827                 /* TRUE if the declaration includes the Microsoft
5828                    __declspec(noinline) specifier. */
5829                 set_irg_inline_property(irg, irg_inline_forbidden);
5830         }
5831 }
5832
5833 static void add_function_pointer(ir_type *segment, ir_entity *method,
5834                                  const char *unique_template)
5835 {
5836         ir_type   *method_type  = get_entity_type(method);
5837         ir_type   *ptr_type     = new_type_pointer(method_type);
5838
5839         /* these entities don't really have a name but firm only allows
5840          * "" in ld_ident.
5841          * Note that we mustn't give these entities a name since for example
5842          * Mach-O doesn't allow them. */
5843         ident     *ide          = id_unique(unique_template);
5844         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5845         ir_graph  *irg          = get_const_code_irg();
5846         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5847                                                            method);
5848
5849         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5850         set_entity_compiler_generated(ptr, 1);
5851         set_entity_visibility(ptr, ir_visibility_private);
5852         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5853         set_atomic_ent_value(ptr, val);
5854 }
5855
5856 /**
5857  * Generate possible IJmp branches to a given label block.
5858  */
5859 static void gen_ijmp_branches(ir_node *block)
5860 {
5861         ir_node *ijmp;
5862         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5863                 add_immBlock_pred(block, ijmp);
5864         }
5865 }
5866
5867 /**
5868  * Create code for a function and all inner functions.
5869  *
5870  * @param entity  the function entity
5871  */
5872 static void create_function(entity_t *entity)
5873 {
5874         assert(entity->kind == ENTITY_FUNCTION);
5875         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5876
5877         if (entity->function.statement == NULL)
5878                 return;
5879
5880         if (is_main(entity) && enable_main_collect2_hack) {
5881                 prepare_main_collect2(entity);
5882         }
5883
5884         inner_functions     = NULL;
5885         current_trampolines = NULL;
5886
5887         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5888                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5889                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5890         }
5891         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5892                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5893                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5894         }
5895
5896         current_function_entity = entity;
5897         current_function_name   = NULL;
5898         current_funcsig         = NULL;
5899
5900         assert(all_labels == NULL);
5901         all_labels = NEW_ARR_F(label_t *, 0);
5902         ijmp_list  = NULL;
5903
5904         int       n_local_vars = get_function_n_local_vars(entity);
5905         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5906         current_ir_graph = irg;
5907
5908         ir_graph *old_current_function = current_function;
5909         current_function = irg;
5910
5911         set_irg_fp_model(irg, firm_opt.fp_model);
5912         tarval_enable_fp_ops(1);
5913         set_irn_dbg_info(get_irg_start_block(irg),
5914                          get_entity_dbg_info(function_entity));
5915
5916         ir_node *first_block = get_cur_block();
5917
5918         /* set inline flags */
5919         if (entity->function.is_inline)
5920                 set_irg_inline_property(irg, irg_inline_recomended);
5921         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5922
5923         next_value_number_function = 0;
5924         initialize_function_parameters(entity);
5925         current_static_link = entity->function.static_link;
5926
5927         statement_to_firm(entity->function.statement);
5928
5929         ir_node *end_block = get_irg_end_block(irg);
5930
5931         /* do we have a return statement yet? */
5932         if (get_cur_block() != NULL) {
5933                 type_t *type = skip_typeref(entity->declaration.type);
5934                 assert(is_type_function(type));
5935                 const function_type_t *func_type   = &type->function;
5936                 const type_t          *return_type
5937                         = skip_typeref(func_type->return_type);
5938
5939                 ir_node *ret;
5940                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5941                         ret = new_Return(get_store(), 0, NULL);
5942                 } else {
5943                         ir_mode *mode;
5944                         if (is_type_scalar(return_type)) {
5945                                 mode = get_ir_mode_storage(func_type->return_type);
5946                         } else {
5947                                 mode = mode_P_data;
5948                         }
5949
5950                         ir_node *in[1];
5951                         /* §5.1.2.2.3 main implicitly returns 0 */
5952                         if (is_main(entity)) {
5953                                 in[0] = new_Const(get_mode_null(mode));
5954                         } else {
5955                                 in[0] = new_Unknown(mode);
5956                         }
5957                         ret = new_Return(get_store(), 1, in);
5958                 }
5959                 add_immBlock_pred(end_block, ret);
5960         }
5961
5962         bool has_computed_gotos = false;
5963         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5964                 label_t *label = all_labels[i];
5965                 if (label->address_taken) {
5966                         gen_ijmp_branches(label->block);
5967                         has_computed_gotos = true;
5968                 }
5969                 mature_immBlock(label->block);
5970         }
5971         if (has_computed_gotos) {
5972                 /* if we have computed goto's in the function, we cannot inline it */
5973                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5974                         warningf(&entity->base.source_position,
5975                                  "function '%Y' can never be inlined because it contains a computed goto",
5976                                  entity->base.symbol);
5977                 }
5978                 set_irg_inline_property(irg, irg_inline_forbidden);
5979         }
5980
5981         DEL_ARR_F(all_labels);
5982         all_labels = NULL;
5983
5984         mature_immBlock(first_block);
5985         mature_immBlock(end_block);
5986
5987         irg_finalize_cons(irg);
5988
5989         /* finalize the frame type */
5990         ir_type *frame_type = get_irg_frame_type(irg);
5991         int      n          = get_compound_n_members(frame_type);
5992         int      align_all  = 4;
5993         int      offset     = 0;
5994         for (int i = 0; i < n; ++i) {
5995                 ir_entity *entity      = get_compound_member(frame_type, i);
5996                 ir_type   *entity_type = get_entity_type(entity);
5997
5998                 int align = get_type_alignment_bytes(entity_type);
5999                 if (align > align_all)
6000                         align_all = align;
6001                 int misalign = 0;
6002                 if (align > 0) {
6003                         misalign  = offset % align;
6004                         if (misalign > 0) {
6005                                 offset += align - misalign;
6006                         }
6007                 }
6008
6009                 set_entity_offset(entity, offset);
6010                 offset += get_type_size_bytes(entity_type);
6011         }
6012         set_type_size_bytes(frame_type, offset);
6013         set_type_alignment_bytes(frame_type, align_all);
6014
6015         irg_verify(irg, VERIFY_ENFORCE_SSA);
6016         current_function = old_current_function;
6017
6018         if (current_trampolines != NULL) {
6019                 DEL_ARR_F(current_trampolines);
6020                 current_trampolines = NULL;
6021         }
6022
6023         /* create inner functions if any */
6024         entity_t **inner = inner_functions;
6025         if (inner != NULL) {
6026                 ir_type *rem_outer_frame      = current_outer_frame;
6027                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
6028                 ir_type *rem_outer_value_type = current_outer_value_type;
6029                 current_outer_value_type      = get_irg_value_param_type(current_ir_graph);
6030                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
6031                         create_function(inner[i]);
6032                 }
6033                 DEL_ARR_F(inner);
6034
6035                 current_outer_value_type = rem_outer_value_type;
6036                 current_outer_frame      = rem_outer_frame;
6037         }
6038 }
6039
6040 static void scope_to_firm(scope_t *scope)
6041 {
6042         /* first pass: create declarations */
6043         entity_t *entity = scope->entities;
6044         for ( ; entity != NULL; entity = entity->base.next) {
6045                 if (entity->base.symbol == NULL)
6046                         continue;
6047
6048                 if (entity->kind == ENTITY_FUNCTION) {
6049                         if (entity->function.btk != bk_none) {
6050                                 /* builtins have no representation */
6051                                 continue;
6052                         }
6053                         (void)get_function_entity(entity, NULL);
6054                 } else if (entity->kind == ENTITY_VARIABLE) {
6055                         create_global_variable(entity);
6056                 } else if (entity->kind == ENTITY_NAMESPACE) {
6057                         scope_to_firm(&entity->namespacee.members);
6058                 }
6059         }
6060
6061         /* second pass: create code/initializers */
6062         entity = scope->entities;
6063         for ( ; entity != NULL; entity = entity->base.next) {
6064                 if (entity->base.symbol == NULL)
6065                         continue;
6066
6067                 if (entity->kind == ENTITY_FUNCTION) {
6068                         if (entity->function.btk != bk_none) {
6069                                 /* builtins have no representation */
6070                                 continue;
6071                         }
6072                         create_function(entity);
6073                 } else if (entity->kind == ENTITY_VARIABLE) {
6074                         assert(entity->declaration.kind
6075                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
6076                         current_ir_graph = get_const_code_irg();
6077                         create_variable_initializer(entity);
6078                 }
6079         }
6080 }
6081
6082 void init_ast2firm(void)
6083 {
6084         obstack_init(&asm_obst);
6085         init_atomic_modes();
6086
6087         ir_set_debug_retrieve(dbg_retrieve);
6088         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
6089
6090         /* create idents for all known runtime functions */
6091         for (size_t i = 0; i < lengthof(rts_data); ++i) {
6092                 rts_idents[i] = new_id_from_str(rts_data[i].name);
6093         }
6094
6095         entitymap_init(&entitymap);
6096 }
6097
6098 static void init_ir_types(void)
6099 {
6100         static int ir_types_initialized = 0;
6101         if (ir_types_initialized)
6102                 return;
6103         ir_types_initialized = 1;
6104
6105         ir_type_int        = get_ir_type(type_int);
6106         ir_type_char       = get_ir_type(type_char);
6107         ir_type_const_char = get_ir_type(type_const_char);
6108         ir_type_wchar_t    = get_ir_type(type_wchar_t);
6109         ir_type_void       = get_ir_type(type_void);
6110
6111         be_params             = be_get_backend_param();
6112         mode_float_arithmetic = be_params->mode_float_arithmetic;
6113
6114         stack_param_align     = be_params->stack_param_align;
6115 }
6116
6117 void exit_ast2firm(void)
6118 {
6119         entitymap_destroy(&entitymap);
6120         obstack_free(&asm_obst, NULL);
6121 }
6122
6123 static void global_asm_to_firm(statement_t *s)
6124 {
6125         for (; s != NULL; s = s->base.next) {
6126                 assert(s->kind == STATEMENT_ASM);
6127
6128                 char const *const text = s->asms.asm_text.begin;
6129                 size_t            size = s->asms.asm_text.size;
6130
6131                 /* skip the last \0 */
6132                 if (text[size - 1] == '\0')
6133                         --size;
6134
6135                 ident *const id = new_id_from_chars(text, size);
6136                 add_irp_asm(id);
6137         }
6138 }
6139
6140 void translation_unit_to_firm(translation_unit_t *unit)
6141 {
6142         /* initialize firm arithmetic */
6143         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
6144         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
6145
6146         /* just to be sure */
6147         continue_label           = NULL;
6148         break_label              = NULL;
6149         current_switch_cond      = NULL;
6150         current_translation_unit = unit;
6151
6152         init_ir_types();
6153
6154         scope_to_firm(&unit->scope);
6155         global_asm_to_firm(unit->global_asm);
6156
6157         current_ir_graph         = NULL;
6158         current_translation_unit = NULL;
6159 }