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