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;
2774                 ir_node *res;
2775                 if (mode_is_float(mode)) {
2776                         op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2777                         res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2778                 } else {
2779                         op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2780                         res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2781                 }
2782                 return res;
2783         }
2784         case EXPR_BINARY_MOD:
2785         case EXPR_BINARY_MOD_ASSIGN: {
2786                 ir_node *pin = new_Pin(new_NoMem());
2787                 assert(!mode_is_float(mode));
2788                 ir_node *op  = new_d_Mod(dbgi, pin, left, right, mode,
2789                                          op_pin_state_floats);
2790                 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2791                 return res;
2792         }
2793         default:
2794                 panic("unexpected expression kind");
2795         }
2796 }
2797
2798 static ir_node *create_lazy_op(const binary_expression_t *expression)
2799 {
2800         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2801         type_t   *type = skip_typeref(expression->base.type);
2802         ir_mode  *mode = get_ir_mode_arithmetic(type);
2803
2804         if (is_constant_expression(expression->left) == EXPR_CLASS_CONSTANT) {
2805                 bool val = fold_constant_to_bool(expression->left);
2806                 expression_kind_t ekind = expression->base.kind;
2807                 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2808                 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2809                         if (!val) {
2810                                 return new_Const(get_mode_null(mode));
2811                         }
2812                 } else {
2813                         if (val) {
2814                                 return new_Const(get_mode_one(mode));
2815                         }
2816                 }
2817
2818                 if (is_constant_expression(expression->right) == EXPR_CLASS_CONSTANT) {
2819                         bool valr = fold_constant_to_bool(expression->right);
2820                         return create_Const_from_bool(mode, valr);
2821                 }
2822
2823                 return produce_condition_result(expression->right, mode, dbgi);
2824         }
2825
2826         return produce_condition_result((const expression_t*) expression, mode,
2827                                         dbgi);
2828 }
2829
2830 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2831                                             ir_node *right, ir_mode *mode);
2832
2833 static ir_node *create_assign_binop(const binary_expression_t *expression)
2834 {
2835         dbg_info *const     dbgi = get_dbg_info(&expression->base.source_position);
2836         const expression_t *left_expr = expression->left;
2837         type_t             *type      = skip_typeref(left_expr->base.type);
2838         ir_node            *right     = expression_to_firm(expression->right);
2839         ir_node            *left_addr = expression_to_addr(left_expr);
2840         ir_node            *left      = get_value_from_lvalue(left_expr, left_addr);
2841         ir_node            *result    = create_op(dbgi, expression, left, right);
2842
2843         result = create_cast(dbgi, result, expression->right->base.type, type);
2844         result = do_strict_conv(dbgi, result);
2845
2846         result = set_value_for_expression_addr(left_expr, result, left_addr);
2847
2848         if (!is_type_compound(type)) {
2849                 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2850                 result = create_conv(dbgi, result, mode_arithmetic);
2851         }
2852         return result;
2853 }
2854
2855 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2856 {
2857         expression_kind_t kind = expression->base.kind;
2858
2859         switch(kind) {
2860         case EXPR_BINARY_EQUAL:
2861         case EXPR_BINARY_NOTEQUAL:
2862         case EXPR_BINARY_LESS:
2863         case EXPR_BINARY_LESSEQUAL:
2864         case EXPR_BINARY_GREATER:
2865         case EXPR_BINARY_GREATEREQUAL:
2866         case EXPR_BINARY_ISGREATER:
2867         case EXPR_BINARY_ISGREATEREQUAL:
2868         case EXPR_BINARY_ISLESS:
2869         case EXPR_BINARY_ISLESSEQUAL:
2870         case EXPR_BINARY_ISLESSGREATER:
2871         case EXPR_BINARY_ISUNORDERED: {
2872                 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2873                 ir_node *left  = expression_to_firm(expression->left);
2874                 ir_node *right = expression_to_firm(expression->right);
2875                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
2876                 long     pnc   = get_pnc(kind, expression->left->base.type);
2877                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
2878                 return proj;
2879         }
2880         case EXPR_BINARY_ASSIGN: {
2881                 ir_node *addr  = expression_to_addr(expression->left);
2882                 ir_node *right = expression_to_firm(expression->right);
2883                 ir_node *res
2884                         = set_value_for_expression_addr(expression->left, right, addr);
2885
2886                 type_t  *type            = skip_typeref(expression->base.type);
2887                 if (!is_type_compound(type)) {
2888                         ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2889                         res                      = create_conv(NULL, res, mode_arithmetic);
2890                 }
2891                 return res;
2892         }
2893         case EXPR_BINARY_ADD:
2894         case EXPR_BINARY_SUB:
2895         case EXPR_BINARY_MUL:
2896         case EXPR_BINARY_DIV:
2897         case EXPR_BINARY_MOD:
2898         case EXPR_BINARY_BITWISE_AND:
2899         case EXPR_BINARY_BITWISE_OR:
2900         case EXPR_BINARY_BITWISE_XOR:
2901         case EXPR_BINARY_SHIFTLEFT:
2902         case EXPR_BINARY_SHIFTRIGHT:
2903         {
2904                 dbg_info *dbgi  = get_dbg_info(&expression->base.source_position);
2905                 ir_node  *left  = expression_to_firm(expression->left);
2906                 ir_node  *right = expression_to_firm(expression->right);
2907                 return create_op(dbgi, expression, left, right);
2908         }
2909         case EXPR_BINARY_LOGICAL_AND:
2910         case EXPR_BINARY_LOGICAL_OR:
2911                 return create_lazy_op(expression);
2912         case EXPR_BINARY_COMMA:
2913                 /* create side effects of left side */
2914                 (void) expression_to_firm(expression->left);
2915                 return _expression_to_firm(expression->right);
2916
2917         case EXPR_BINARY_ADD_ASSIGN:
2918         case EXPR_BINARY_SUB_ASSIGN:
2919         case EXPR_BINARY_MUL_ASSIGN:
2920         case EXPR_BINARY_MOD_ASSIGN:
2921         case EXPR_BINARY_DIV_ASSIGN:
2922         case EXPR_BINARY_BITWISE_AND_ASSIGN:
2923         case EXPR_BINARY_BITWISE_OR_ASSIGN:
2924         case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2925         case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2926         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2927                 return create_assign_binop(expression);
2928         default:
2929                 panic("TODO binexpr type");
2930         }
2931 }
2932
2933 static ir_node *array_access_addr(const array_access_expression_t *expression)
2934 {
2935         dbg_info *dbgi        = get_dbg_info(&expression->base.source_position);
2936         ir_node  *base_addr   = expression_to_firm(expression->array_ref);
2937         ir_node  *offset      = expression_to_firm(expression->index);
2938         type_t   *ref_type    = skip_typeref(expression->array_ref->base.type);
2939         ir_node  *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2940         ir_node  *result      = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2941
2942         return result;
2943 }
2944
2945 static ir_node *array_access_to_firm(
2946                 const array_access_expression_t *expression)
2947 {
2948         dbg_info *dbgi   = get_dbg_info(&expression->base.source_position);
2949         ir_node  *addr   = array_access_addr(expression);
2950         type_t   *type   = revert_automatic_type_conversion(
2951                         (const expression_t*) expression);
2952         type             = skip_typeref(type);
2953
2954         return deref_address(dbgi, type, addr);
2955 }
2956
2957 static long get_offsetof_offset(const offsetof_expression_t *expression)
2958 {
2959         type_t *orig_type = expression->type;
2960         long    offset    = 0;
2961
2962         designator_t *designator = expression->designator;
2963         for ( ; designator != NULL; designator = designator->next) {
2964                 type_t *type = skip_typeref(orig_type);
2965                 /* be sure the type is constructed */
2966                 (void) get_ir_type(type);
2967
2968                 if (designator->symbol != NULL) {
2969                         assert(is_type_compound(type));
2970                         symbol_t *symbol = designator->symbol;
2971
2972                         compound_t *compound = type->compound.compound;
2973                         entity_t   *iter     = compound->members.entities;
2974                         for ( ; iter != NULL; iter = iter->base.next) {
2975                                 if (iter->base.symbol == symbol) {
2976                                         break;
2977                                 }
2978                         }
2979                         assert(iter != NULL);
2980
2981                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2982                         assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2983                         offset += get_entity_offset(iter->compound_member.entity);
2984
2985                         orig_type = iter->declaration.type;
2986                 } else {
2987                         expression_t *array_index = designator->array_index;
2988                         assert(designator->array_index != NULL);
2989                         assert(is_type_array(type));
2990
2991                         long index         = fold_constant_to_int(array_index);
2992                         ir_type *arr_type  = get_ir_type(type);
2993                         ir_type *elem_type = get_array_element_type(arr_type);
2994                         long     elem_size = get_type_size_bytes(elem_type);
2995
2996                         offset += index * elem_size;
2997
2998                         orig_type = type->array.element_type;
2999                 }
3000         }
3001
3002         return offset;
3003 }
3004
3005 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
3006 {
3007         ir_mode   *mode   = get_ir_mode_arithmetic(expression->base.type);
3008         long       offset = get_offsetof_offset(expression);
3009         ir_tarval *tv     = new_tarval_from_long(offset, mode);
3010         dbg_info  *dbgi   = get_dbg_info(&expression->base.source_position);
3011
3012         return new_d_Const(dbgi, tv);
3013 }
3014
3015 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3016                                      ir_entity *entity, type_t *type);
3017
3018 static ir_node *compound_literal_to_firm(
3019                 const compound_literal_expression_t *expression)
3020 {
3021         type_t *type = expression->type;
3022
3023         /* create an entity on the stack */
3024         ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3025
3026         ident     *const id     = id_unique("CompLit.%u");
3027         ir_type   *const irtype = get_ir_type(type);
3028         dbg_info  *const dbgi   = get_dbg_info(&expression->base.source_position);
3029         ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
3030         set_entity_ld_ident(entity, id);
3031
3032         /* create initialisation code */
3033         initializer_t *initializer = expression->initializer;
3034         create_local_initializer(initializer, dbgi, entity, type);
3035
3036         /* create a sel for the compound literal address */
3037         ir_node *frame = get_irg_frame(current_ir_graph);
3038         ir_node *sel   = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3039         return sel;
3040 }
3041
3042 /**
3043  * Transform a sizeof expression into Firm code.
3044  */
3045 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
3046 {
3047         type_t *const type = skip_typeref(expression->type);
3048         /* §6.5.3.4:2 if the type is a VLA, evaluate the expression. */
3049         if (is_type_array(type) && type->array.is_vla
3050                         && expression->tp_expression != NULL) {
3051                 expression_to_firm(expression->tp_expression);
3052         }
3053
3054         return get_type_size_node(type);
3055 }
3056
3057 static entity_t *get_expression_entity(const expression_t *expression)
3058 {
3059         if (expression->kind != EXPR_REFERENCE)
3060                 return NULL;
3061
3062         return expression->reference.entity;
3063 }
3064
3065 static unsigned get_cparser_entity_alignment(const entity_t *entity)
3066 {
3067         switch(entity->kind) {
3068         DECLARATION_KIND_CASES
3069                 return entity->declaration.alignment;
3070         case ENTITY_STRUCT:
3071         case ENTITY_UNION:
3072                 return entity->compound.alignment;
3073         case ENTITY_TYPEDEF:
3074                 return entity->typedefe.alignment;
3075         default:
3076                 break;
3077         }
3078         return 0;
3079 }
3080
3081 /**
3082  * Transform an alignof expression into Firm code.
3083  */
3084 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
3085 {
3086         unsigned alignment = 0;
3087
3088         const expression_t *tp_expression = expression->tp_expression;
3089         if (tp_expression != NULL) {
3090                 entity_t *entity = get_expression_entity(tp_expression);
3091                 if (entity != NULL) {
3092                         alignment = get_cparser_entity_alignment(entity);
3093                 }
3094         }
3095
3096         if (alignment == 0) {
3097                 type_t *type = expression->type;
3098                 alignment = get_type_alignment(type);
3099         }
3100
3101         dbg_info  *dbgi = get_dbg_info(&expression->base.source_position);
3102         ir_mode   *mode = get_ir_mode_arithmetic(expression->base.type);
3103         ir_tarval *tv   = new_tarval_from_long(alignment, mode);
3104         return new_d_Const(dbgi, tv);
3105 }
3106
3107 static void init_ir_types(void);
3108
3109 static ir_tarval *fold_constant_to_tarval(const expression_t *expression)
3110 {
3111         assert(is_type_valid(skip_typeref(expression->base.type)));
3112
3113         bool constant_folding_old = constant_folding;
3114         constant_folding = true;
3115
3116         init_ir_types();
3117
3118         assert(is_constant_expression(expression) == EXPR_CLASS_CONSTANT);
3119
3120         ir_graph *old_current_ir_graph = current_ir_graph;
3121         current_ir_graph = get_const_code_irg();
3122
3123         ir_node *cnst = expression_to_firm(expression);
3124         current_ir_graph = old_current_ir_graph;
3125
3126         if (!is_Const(cnst)) {
3127                 panic("couldn't fold constant");
3128         }
3129
3130         constant_folding = constant_folding_old;
3131
3132         return get_Const_tarval(cnst);
3133 }
3134
3135 long fold_constant_to_int(const expression_t *expression)
3136 {
3137         if (expression->kind == EXPR_INVALID)
3138                 return 0;
3139
3140         ir_tarval *tv = fold_constant_to_tarval(expression);
3141         if (!tarval_is_long(tv)) {
3142                 panic("result of constant folding is not integer");
3143         }
3144
3145         return get_tarval_long(tv);
3146 }
3147
3148 bool fold_constant_to_bool(const expression_t *expression)
3149 {
3150         if (expression->kind == EXPR_INVALID)
3151                 return false;
3152         ir_tarval *tv = fold_constant_to_tarval(expression);
3153         return !tarval_is_null(tv);
3154 }
3155
3156 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
3157 {
3158         dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
3159
3160         /* first try to fold a constant condition */
3161         if (is_constant_expression(expression->condition) == EXPR_CLASS_CONSTANT) {
3162                 bool val = fold_constant_to_bool(expression->condition);
3163                 if (val) {
3164                         expression_t *true_expression = expression->true_expression;
3165                         if (true_expression == NULL)
3166                                 true_expression = expression->condition;
3167                         return expression_to_firm(true_expression);
3168                 } else {
3169                         return expression_to_firm(expression->false_expression);
3170                 }
3171         }
3172
3173         ir_node *const true_block  = new_immBlock();
3174         ir_node *const false_block = new_immBlock();
3175         ir_node *const cond_expr   = create_condition_evaluation(expression->condition, true_block, false_block);
3176         mature_immBlock(true_block);
3177         mature_immBlock(false_block);
3178
3179         set_cur_block(true_block);
3180         ir_node *true_val;
3181         if (expression->true_expression != NULL) {
3182                 true_val = expression_to_firm(expression->true_expression);
3183         } else if (cond_expr != NULL && get_irn_mode(cond_expr) != mode_b) {
3184                 true_val = cond_expr;
3185         } else {
3186                 /* Condition ended with a short circuit (&&, ||, !) operation or a
3187                  * comparison.  Generate a "1" as value for the true branch. */
3188                 true_val = new_Const(get_mode_one(mode_Is));
3189         }
3190         ir_node *const true_jmp = new_d_Jmp(dbgi);
3191
3192         set_cur_block(false_block);
3193         ir_node *const false_val = expression_to_firm(expression->false_expression);
3194         ir_node *const false_jmp = new_d_Jmp(dbgi);
3195
3196         /* create the common block */
3197         ir_node *const in_cf[2] = { true_jmp, false_jmp };
3198         ir_node *const block    = new_Block(lengthof(in_cf), in_cf);
3199         set_cur_block(block);
3200
3201         /* TODO improve static semantics, so either both or no values are NULL */
3202         if (true_val == NULL || false_val == NULL)
3203                 return NULL;
3204
3205         ir_node *const in[2] = { true_val, false_val };
3206         ir_mode *const mode  = get_irn_mode(true_val);
3207         assert(get_irn_mode(false_val) == mode);
3208         ir_node *const val   = new_d_Phi(dbgi, lengthof(in), in, mode);
3209
3210         return val;
3211 }
3212
3213 /**
3214  * Returns an IR-node representing the address of a field.
3215  */
3216 static ir_node *select_addr(const select_expression_t *expression)
3217 {
3218         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3219
3220         construct_select_compound(expression);
3221
3222         ir_node *compound_addr = expression_to_firm(expression->compound);
3223
3224         entity_t *entry = expression->compound_entry;
3225         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3226         assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
3227
3228         if (constant_folding) {
3229                 ir_mode *mode = get_irn_mode(compound_addr);
3230                 /* FIXME: here, we need an integer mode with the same number of bits as mode */
3231                 ir_node *ofs  = new_Const_long(mode_uint, entry->compound_member.offset);
3232                 return new_d_Add(dbgi, compound_addr, ofs, mode);
3233         } else {
3234                 ir_entity *irentity = entry->compound_member.entity;
3235                 assert(irentity != NULL);
3236                 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
3237         }
3238 }
3239
3240 static ir_node *select_to_firm(const select_expression_t *expression)
3241 {
3242         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3243         ir_node  *addr = select_addr(expression);
3244         type_t   *type = revert_automatic_type_conversion(
3245                         (const expression_t*) expression);
3246         type           = skip_typeref(type);
3247
3248         entity_t *entry      = expression->compound_entry;
3249         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3250         type_t   *entry_type = skip_typeref(entry->declaration.type);
3251
3252         if (entry_type->kind == TYPE_BITFIELD) {
3253                 return bitfield_extract_to_firm(expression, addr);
3254         }
3255
3256         return deref_address(dbgi, type, addr);
3257 }
3258
3259 /* Values returned by __builtin_classify_type. */
3260 typedef enum gcc_type_class
3261 {
3262         no_type_class = -1,
3263         void_type_class,
3264         integer_type_class,
3265         char_type_class,
3266         enumeral_type_class,
3267         boolean_type_class,
3268         pointer_type_class,
3269         reference_type_class,
3270         offset_type_class,
3271         real_type_class,
3272         complex_type_class,
3273         function_type_class,
3274         method_type_class,
3275         record_type_class,
3276         union_type_class,
3277         array_type_class,
3278         string_type_class,
3279         set_type_class,
3280         file_type_class,
3281         lang_type_class
3282 } gcc_type_class;
3283
3284 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
3285 {
3286         type_t *type = expr->type_expression->base.type;
3287
3288         /* FIXME gcc returns different values depending on whether compiling C or C++
3289          * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
3290         gcc_type_class tc;
3291         for (;;) {
3292                 type = skip_typeref(type);
3293                 switch (type->kind) {
3294                         case TYPE_ATOMIC: {
3295                                 const atomic_type_t *const atomic_type = &type->atomic;
3296                                 switch (atomic_type->akind) {
3297                                         /* should not be reached */
3298                                         case ATOMIC_TYPE_INVALID:
3299                                                 tc = no_type_class;
3300                                                 goto make_const;
3301
3302                                         /* gcc cannot do that */
3303                                         case ATOMIC_TYPE_VOID:
3304                                                 tc = void_type_class;
3305                                                 goto make_const;
3306
3307                                         case ATOMIC_TYPE_WCHAR_T:   /* gcc handles this as integer */
3308                                         case ATOMIC_TYPE_CHAR:      /* gcc handles this as integer */
3309                                         case ATOMIC_TYPE_SCHAR:     /* gcc handles this as integer */
3310                                         case ATOMIC_TYPE_UCHAR:     /* gcc handles this as integer */
3311                                         case ATOMIC_TYPE_SHORT:
3312                                         case ATOMIC_TYPE_USHORT:
3313                                         case ATOMIC_TYPE_INT:
3314                                         case ATOMIC_TYPE_UINT:
3315                                         case ATOMIC_TYPE_LONG:
3316                                         case ATOMIC_TYPE_ULONG:
3317                                         case ATOMIC_TYPE_LONGLONG:
3318                                         case ATOMIC_TYPE_ULONGLONG:
3319                                         case ATOMIC_TYPE_BOOL:      /* gcc handles this as integer */
3320                                                 tc = integer_type_class;
3321                                                 goto make_const;
3322
3323                                         case ATOMIC_TYPE_FLOAT:
3324                                         case ATOMIC_TYPE_DOUBLE:
3325                                         case ATOMIC_TYPE_LONG_DOUBLE:
3326                                                 tc = real_type_class;
3327                                                 goto make_const;
3328                                 }
3329                                 panic("Unexpected atomic type in classify_type_to_firm().");
3330                         }
3331
3332                         case TYPE_COMPLEX:         tc = complex_type_class; goto make_const;
3333                         case TYPE_IMAGINARY:       tc = complex_type_class; goto make_const;
3334                         case TYPE_BITFIELD:        tc = integer_type_class; goto make_const;
3335                         case TYPE_ARRAY:           /* gcc handles this as pointer */
3336                         case TYPE_FUNCTION:        /* gcc handles this as pointer */
3337                         case TYPE_POINTER:         tc = pointer_type_class; goto make_const;
3338                         case TYPE_COMPOUND_STRUCT: tc = record_type_class;  goto make_const;
3339                         case TYPE_COMPOUND_UNION:  tc = union_type_class;   goto make_const;
3340
3341                         /* gcc handles this as integer */
3342                         case TYPE_ENUM:            tc = integer_type_class; goto make_const;
3343
3344                         /* gcc classifies the referenced type */
3345                         case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3346
3347                         case TYPE_BUILTIN:
3348                         /* typedef/typeof should be skipped already */
3349                         case TYPE_TYPEDEF:
3350                         case TYPE_TYPEOF:
3351                         case TYPE_INVALID:
3352                         case TYPE_ERROR:
3353                                 break;
3354                 }
3355                 panic("unexpected TYPE classify_type_to_firm().");
3356         }
3357
3358 make_const:;
3359         dbg_info  *const dbgi = get_dbg_info(&expr->base.source_position);
3360         ir_tarval *const tv   = new_tarval_from_long(tc, mode_int);
3361         return new_d_Const(dbgi, tv);
3362 }
3363
3364 static ir_node *function_name_to_firm(
3365                 const funcname_expression_t *const expr)
3366 {
3367         switch(expr->kind) {
3368         case FUNCNAME_FUNCTION:
3369         case FUNCNAME_PRETTY_FUNCTION:
3370         case FUNCNAME_FUNCDNAME:
3371                 if (current_function_name == NULL) {
3372                         const source_position_t *const src_pos = &expr->base.source_position;
3373                         const char    *name  = current_function_entity->base.symbol->string;
3374                         const string_t string = { name, strlen(name) + 1 };
3375                         current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3376                 }
3377                 return current_function_name;
3378         case FUNCNAME_FUNCSIG:
3379                 if (current_funcsig == NULL) {
3380                         const source_position_t *const src_pos = &expr->base.source_position;
3381                         ir_entity *ent = get_irg_entity(current_ir_graph);
3382                         const char *const name = get_entity_ld_name(ent);
3383                         const string_t string = { name, strlen(name) + 1 };
3384                         current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3385                 }
3386                 return current_funcsig;
3387         }
3388         panic("Unsupported function name");
3389 }
3390
3391 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3392 {
3393         statement_t *statement = expr->statement;
3394
3395         assert(statement->kind == STATEMENT_COMPOUND);
3396         return compound_statement_to_firm(&statement->compound);
3397 }
3398
3399 static ir_node *va_start_expression_to_firm(
3400         const va_start_expression_t *const expr)
3401 {
3402         type_t    *const type        = current_function_entity->declaration.type;
3403         ir_type   *const method_type = get_ir_type(type);
3404         int        const n           = get_method_n_params(method_type) - 1;
3405         ir_entity *const parm_ent    = get_method_value_param_ent(method_type, n);
3406         ir_node   *const frame       = get_irg_frame(current_ir_graph);
3407         dbg_info  *const dbgi        = get_dbg_info(&expr->base.source_position);
3408         ir_node   *const no_mem      = new_NoMem();
3409         ir_node   *const arg_sel     =
3410                 new_d_simpleSel(dbgi, no_mem, frame, parm_ent);
3411
3412         type_t    *const param_type  = expr->parameter->base.type;
3413         ir_node   *const cnst        = get_type_size_node(param_type);
3414         ir_mode   *const mode        = get_irn_mode(cnst);
3415         ir_node   *const c1          = new_Const_long(mode, stack_param_align - 1);
3416         ir_node   *const c2          = new_d_Add(dbgi, cnst, c1, mode);
3417         ir_node   *const c3          = new_Const_long(mode, -(long)stack_param_align);
3418         ir_node   *const c4          = new_d_And(dbgi, c2, c3, mode);
3419         ir_node   *const add         = new_d_Add(dbgi, arg_sel, c4, mode_P_data);
3420         set_value_for_expression(expr->ap, add);
3421
3422         return NULL;
3423 }
3424
3425 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3426 {
3427         type_t       *const type    = expr->base.type;
3428         expression_t *const ap_expr = expr->ap;
3429         ir_node      *const ap_addr = expression_to_addr(ap_expr);
3430         ir_node      *const ap      = get_value_from_lvalue(ap_expr, ap_addr);
3431         dbg_info     *const dbgi    = get_dbg_info(&expr->base.source_position);
3432         ir_node      *const res     = deref_address(dbgi, type, ap);
3433
3434         ir_node      *const cnst    = get_type_size_node(expr->base.type);
3435         ir_mode      *const mode    = get_irn_mode(cnst);
3436         ir_node      *const c1      = new_Const_long(mode, stack_param_align - 1);
3437         ir_node      *const c2      = new_d_Add(dbgi, cnst, c1, mode);
3438         ir_node      *const c3      = new_Const_long(mode, -(long)stack_param_align);
3439         ir_node      *const c4      = new_d_And(dbgi, c2, c3, mode);
3440         ir_node      *const add     = new_d_Add(dbgi, ap, c4, mode_P_data);
3441
3442         set_value_for_expression_addr(ap_expr, add, ap_addr);
3443
3444         return res;
3445 }
3446
3447 /**
3448  * Generate Firm for a va_copy expression.
3449  */
3450 static ir_node *va_copy_expression_to_firm(const va_copy_expression_t *const expr)
3451 {
3452         ir_node *const src = expression_to_firm(expr->src);
3453         set_value_for_expression(expr->dst, src);
3454         return NULL;
3455 }
3456
3457 static ir_node *dereference_addr(const unary_expression_t *const expression)
3458 {
3459         assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3460         return expression_to_firm(expression->value);
3461 }
3462
3463 /**
3464  * Returns a IR-node representing an lvalue of the given expression.
3465  */
3466 static ir_node *expression_to_addr(const expression_t *expression)
3467 {
3468         switch(expression->kind) {
3469         case EXPR_ARRAY_ACCESS:
3470                 return array_access_addr(&expression->array_access);
3471         case EXPR_CALL:
3472                 return call_expression_to_firm(&expression->call);
3473         case EXPR_COMPOUND_LITERAL:
3474                 return compound_literal_to_firm(&expression->compound_literal);
3475         case EXPR_REFERENCE:
3476                 return reference_addr(&expression->reference);
3477         case EXPR_SELECT:
3478                 return select_addr(&expression->select);
3479         case EXPR_UNARY_DEREFERENCE:
3480                 return dereference_addr(&expression->unary);
3481         default:
3482                 break;
3483         }
3484         panic("trying to get address of non-lvalue");
3485 }
3486
3487 static ir_node *builtin_constant_to_firm(
3488                 const builtin_constant_expression_t *expression)
3489 {
3490         ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
3491         bool     const v    = is_constant_expression(expression->value) == EXPR_CLASS_CONSTANT;
3492         return create_Const_from_bool(mode, v);
3493 }
3494
3495 static ir_node *builtin_types_compatible_to_firm(
3496                 const builtin_types_compatible_expression_t *expression)
3497 {
3498         type_t  *const left  = get_unqualified_type(skip_typeref(expression->left));
3499         type_t  *const right = get_unqualified_type(skip_typeref(expression->right));
3500         bool     const value = types_compatible(left, right);
3501         ir_mode *const mode  = get_ir_mode_arithmetic(expression->base.type);
3502         return create_Const_from_bool(mode, value);
3503 }
3504
3505 static ir_node *get_label_block(label_t *label)
3506 {
3507         if (label->block != NULL)
3508                 return label->block;
3509
3510         /* beware: might be called from create initializer with current_ir_graph
3511          * set to const_code_irg. */
3512         ir_graph *rem    = current_ir_graph;
3513         current_ir_graph = current_function;
3514
3515         ir_node *block = new_immBlock();
3516
3517         label->block = block;
3518
3519         ARR_APP1(label_t *, all_labels, label);
3520
3521         current_ir_graph = rem;
3522         return block;
3523 }
3524
3525 /**
3526  * Pointer to a label.  This is used for the
3527  * GNU address-of-label extension.
3528  */
3529 static ir_node *label_address_to_firm(const label_address_expression_t *label)
3530 {
3531         dbg_info  *dbgi   = get_dbg_info(&label->base.source_position);
3532         ir_node   *block  = get_label_block(label->label);
3533         ir_entity *entity = create_Block_entity(block);
3534
3535         symconst_symbol value;
3536         value.entity_p = entity;
3537         return new_d_SymConst(dbgi, mode_P_code, value, symconst_addr_ent);
3538 }
3539
3540 /**
3541  * creates firm nodes for an expression. The difference between this function
3542  * and expression_to_firm is, that this version might produce mode_b nodes
3543  * instead of mode_Is.
3544  */
3545 static ir_node *_expression_to_firm(const expression_t *expression)
3546 {
3547 #ifndef NDEBUG
3548         if (!constant_folding) {
3549                 assert(!expression->base.transformed);
3550                 ((expression_t*) expression)->base.transformed = true;
3551         }
3552 #endif
3553
3554         switch (expression->kind) {
3555         EXPR_LITERAL_CASES
3556                 return literal_to_firm(&expression->literal);
3557         case EXPR_STRING_LITERAL:
3558                 return string_to_firm(&expression->base.source_position, "str.%u",
3559                                       &expression->literal.value);
3560         case EXPR_WIDE_STRING_LITERAL:
3561                 return wide_string_literal_to_firm(&expression->string_literal);
3562         case EXPR_REFERENCE:
3563                 return reference_expression_to_firm(&expression->reference);
3564         case EXPR_REFERENCE_ENUM_VALUE:
3565                 return reference_expression_enum_value_to_firm(&expression->reference);
3566         case EXPR_CALL:
3567                 return call_expression_to_firm(&expression->call);
3568         EXPR_UNARY_CASES
3569                 return unary_expression_to_firm(&expression->unary);
3570         EXPR_BINARY_CASES
3571                 return binary_expression_to_firm(&expression->binary);
3572         case EXPR_ARRAY_ACCESS:
3573                 return array_access_to_firm(&expression->array_access);
3574         case EXPR_SIZEOF:
3575                 return sizeof_to_firm(&expression->typeprop);
3576         case EXPR_ALIGNOF:
3577                 return alignof_to_firm(&expression->typeprop);
3578         case EXPR_CONDITIONAL:
3579                 return conditional_to_firm(&expression->conditional);
3580         case EXPR_SELECT:
3581                 return select_to_firm(&expression->select);
3582         case EXPR_CLASSIFY_TYPE:
3583                 return classify_type_to_firm(&expression->classify_type);
3584         case EXPR_FUNCNAME:
3585                 return function_name_to_firm(&expression->funcname);
3586         case EXPR_STATEMENT:
3587                 return statement_expression_to_firm(&expression->statement);
3588         case EXPR_VA_START:
3589                 return va_start_expression_to_firm(&expression->va_starte);
3590         case EXPR_VA_ARG:
3591                 return va_arg_expression_to_firm(&expression->va_arge);
3592         case EXPR_VA_COPY:
3593                 return va_copy_expression_to_firm(&expression->va_copye);
3594         case EXPR_BUILTIN_CONSTANT_P:
3595                 return builtin_constant_to_firm(&expression->builtin_constant);
3596         case EXPR_BUILTIN_TYPES_COMPATIBLE_P:
3597                 return builtin_types_compatible_to_firm(&expression->builtin_types_compatible);
3598         case EXPR_OFFSETOF:
3599                 return offsetof_to_firm(&expression->offsetofe);
3600         case EXPR_COMPOUND_LITERAL:
3601                 return compound_literal_to_firm(&expression->compound_literal);
3602         case EXPR_LABEL_ADDRESS:
3603                 return label_address_to_firm(&expression->label_address);
3604
3605         case EXPR_UNKNOWN:
3606         case EXPR_INVALID:
3607                 break;
3608         }
3609         panic("invalid expression found");
3610 }
3611
3612 /**
3613  * Check if a given expression is a GNU __builtin_expect() call.
3614  */
3615 static bool is_builtin_expect(const expression_t *expression)
3616 {
3617         if (expression->kind != EXPR_CALL)
3618                 return false;
3619
3620         expression_t *function = expression->call.function;
3621         if (function->kind != EXPR_REFERENCE)
3622                 return false;
3623         reference_expression_t *ref = &function->reference;
3624         if (ref->entity->kind         != ENTITY_FUNCTION ||
3625             ref->entity->function.btk != bk_gnu_builtin_expect)
3626                 return false;
3627
3628         return true;
3629 }
3630
3631 static bool produces_mode_b(const expression_t *expression)
3632 {
3633         switch (expression->kind) {
3634         case EXPR_BINARY_EQUAL:
3635         case EXPR_BINARY_NOTEQUAL:
3636         case EXPR_BINARY_LESS:
3637         case EXPR_BINARY_LESSEQUAL:
3638         case EXPR_BINARY_GREATER:
3639         case EXPR_BINARY_GREATEREQUAL:
3640         case EXPR_BINARY_ISGREATER:
3641         case EXPR_BINARY_ISGREATEREQUAL:
3642         case EXPR_BINARY_ISLESS:
3643         case EXPR_BINARY_ISLESSEQUAL:
3644         case EXPR_BINARY_ISLESSGREATER:
3645         case EXPR_BINARY_ISUNORDERED:
3646         case EXPR_UNARY_NOT:
3647                 return true;
3648
3649         case EXPR_CALL:
3650                 if (is_builtin_expect(expression)) {
3651                         expression_t *argument = expression->call.arguments->expression;
3652                         return produces_mode_b(argument);
3653                 }
3654                 return false;
3655         case EXPR_BINARY_COMMA:
3656                 return produces_mode_b(expression->binary.right);
3657
3658         default:
3659                 return false;
3660         }
3661 }
3662
3663 static ir_node *expression_to_firm(const expression_t *expression)
3664 {
3665         if (!produces_mode_b(expression)) {
3666                 ir_node *res = _expression_to_firm(expression);
3667                 assert(res == NULL || get_irn_mode(res) != mode_b);
3668                 return res;
3669         }
3670
3671         if (is_constant_expression(expression) == EXPR_CLASS_CONSTANT) {
3672                 bool const constant_folding_old = constant_folding;
3673                 constant_folding = true;
3674                 ir_node *res  = _expression_to_firm(expression);
3675                 constant_folding = constant_folding_old;
3676                 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3677                 assert(is_Const(res));
3678                 return create_Const_from_bool(mode, !is_Const_null(res));
3679         }
3680
3681         /* we have to produce a 0/1 from the mode_b expression */
3682         dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3683         ir_mode  *mode = get_ir_mode_arithmetic(expression->base.type);
3684         return produce_condition_result(expression, mode, dbgi);
3685 }
3686
3687 /**
3688  * create a short-circuit expression evaluation that tries to construct
3689  * efficient control flow structures for &&, || and ! expressions
3690  */
3691 static ir_node *create_condition_evaluation(const expression_t *expression,
3692                                             ir_node *true_block,
3693                                             ir_node *false_block)
3694 {
3695         switch(expression->kind) {
3696         case EXPR_UNARY_NOT: {
3697                 const unary_expression_t *unary_expression = &expression->unary;
3698                 create_condition_evaluation(unary_expression->value, false_block,
3699                                             true_block);
3700                 return NULL;
3701         }
3702         case EXPR_BINARY_LOGICAL_AND: {
3703                 const binary_expression_t *binary_expression = &expression->binary;
3704
3705                 ir_node *extra_block = new_immBlock();
3706                 create_condition_evaluation(binary_expression->left, extra_block,
3707                                             false_block);
3708                 mature_immBlock(extra_block);
3709                 set_cur_block(extra_block);
3710                 create_condition_evaluation(binary_expression->right, true_block,
3711                                             false_block);
3712                 return NULL;
3713         }
3714         case EXPR_BINARY_LOGICAL_OR: {
3715                 const binary_expression_t *binary_expression = &expression->binary;
3716
3717                 ir_node *extra_block = new_immBlock();
3718                 create_condition_evaluation(binary_expression->left, true_block,
3719                                             extra_block);
3720                 mature_immBlock(extra_block);
3721                 set_cur_block(extra_block);
3722                 create_condition_evaluation(binary_expression->right, true_block,
3723                                             false_block);
3724                 return NULL;
3725         }
3726         default:
3727                 break;
3728         }
3729
3730         dbg_info *dbgi       = get_dbg_info(&expression->base.source_position);
3731         ir_node  *cond_expr  = _expression_to_firm(expression);
3732         ir_node  *condition  = create_conv(dbgi, cond_expr, mode_b);
3733         ir_node  *cond       = new_d_Cond(dbgi, condition);
3734         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3735         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3736
3737         /* set branch prediction info based on __builtin_expect */
3738         if (is_builtin_expect(expression) && is_Cond(cond)) {
3739                 call_argument_t *argument = expression->call.arguments->next;
3740                 if (is_constant_expression(argument->expression) == EXPR_CLASS_CONSTANT) {
3741                         bool             cnst = fold_constant_to_bool(argument->expression);
3742                         cond_jmp_predicate pred;
3743
3744                         if (cnst == false) {
3745                                 pred = COND_JMP_PRED_FALSE;
3746                         } else {
3747                                 pred = COND_JMP_PRED_TRUE;
3748                         }
3749                         set_Cond_jmp_pred(cond, pred);
3750                 }
3751         }
3752
3753         add_immBlock_pred(true_block, true_proj);
3754         add_immBlock_pred(false_block, false_proj);
3755
3756         set_cur_block(NULL);
3757         return cond_expr;
3758 }
3759
3760 static void create_variable_entity(entity_t *variable,
3761                                    declaration_kind_t declaration_kind,
3762                                    ir_type *parent_type)
3763 {
3764         assert(variable->kind == ENTITY_VARIABLE);
3765         type_t    *type = skip_typeref(variable->declaration.type);
3766
3767         ident     *const id        = new_id_from_str(variable->base.symbol->string);
3768         ir_type   *const irtype    = get_ir_type(type);
3769         dbg_info  *const dbgi      = get_dbg_info(&variable->base.source_position);
3770         ir_entity *const irentity  = new_d_entity(parent_type, id, irtype, dbgi);
3771         unsigned         alignment = variable->declaration.alignment;
3772
3773         set_entity_alignment(irentity, alignment);
3774
3775         handle_decl_modifiers(irentity, variable);
3776
3777         variable->declaration.kind  = (unsigned char) declaration_kind;
3778         variable->variable.v.entity = irentity;
3779         set_entity_ld_ident(irentity, create_ld_ident(variable));
3780
3781         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3782                 set_entity_volatility(irentity, volatility_is_volatile);
3783         }
3784 }
3785
3786
3787 typedef struct type_path_entry_t type_path_entry_t;
3788 struct type_path_entry_t {
3789         type_t           *type;
3790         ir_initializer_t *initializer;
3791         size_t            index;
3792         entity_t         *compound_entry;
3793 };
3794
3795 typedef struct type_path_t type_path_t;
3796 struct type_path_t {
3797         type_path_entry_t *path;
3798         type_t            *top_type;
3799         bool               invalid;
3800 };
3801
3802 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3803 {
3804         size_t len = ARR_LEN(path->path);
3805
3806         for (size_t i = 0; i < len; ++i) {
3807                 const type_path_entry_t *entry = & path->path[i];
3808
3809                 type_t *type = skip_typeref(entry->type);
3810                 if (is_type_compound(type)) {
3811                         fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3812                 } else if (is_type_array(type)) {
3813                         fprintf(stderr, "[%u]", (unsigned) entry->index);
3814                 } else {
3815                         fprintf(stderr, "-INVALID-");
3816                 }
3817         }
3818         fprintf(stderr, "  (");
3819         print_type(path->top_type);
3820         fprintf(stderr, ")");
3821 }
3822
3823 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3824 {
3825         size_t len = ARR_LEN(path->path);
3826         assert(len > 0);
3827         return & path->path[len-1];
3828 }
3829
3830 static type_path_entry_t *append_to_type_path(type_path_t *path)
3831 {
3832         size_t len = ARR_LEN(path->path);
3833         ARR_RESIZE(type_path_entry_t, path->path, len+1);
3834
3835         type_path_entry_t *result = & path->path[len];
3836         memset(result, 0, sizeof(result[0]));
3837         return result;
3838 }
3839
3840 static size_t get_compound_member_count(const compound_type_t *type)
3841 {
3842         compound_t *compound  = type->compound;
3843         size_t      n_members = 0;
3844         entity_t   *member    = compound->members.entities;
3845         for ( ; member != NULL; member = member->base.next) {
3846                 ++n_members;
3847         }
3848
3849         return n_members;
3850 }
3851
3852 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3853 {
3854         type_t *orig_top_type = path->top_type;
3855         type_t *top_type      = skip_typeref(orig_top_type);
3856
3857         assert(is_type_compound(top_type) || is_type_array(top_type));
3858
3859         if (ARR_LEN(path->path) == 0) {
3860                 return NULL;
3861         } else {
3862                 type_path_entry_t *top         = get_type_path_top(path);
3863                 ir_initializer_t  *initializer = top->initializer;
3864                 return get_initializer_compound_value(initializer, top->index);
3865         }
3866 }
3867
3868 static void descend_into_subtype(type_path_t *path)
3869 {
3870         type_t *orig_top_type = path->top_type;
3871         type_t *top_type      = skip_typeref(orig_top_type);
3872
3873         assert(is_type_compound(top_type) || is_type_array(top_type));
3874
3875         ir_initializer_t *initializer = get_initializer_entry(path);
3876
3877         type_path_entry_t *top = append_to_type_path(path);
3878         top->type              = top_type;
3879
3880         size_t len;
3881
3882         if (is_type_compound(top_type)) {
3883                 compound_t *compound = top_type->compound.compound;
3884                 entity_t   *entry    = compound->members.entities;
3885
3886                 top->compound_entry = entry;
3887                 top->index          = 0;
3888                 len                 = get_compound_member_count(&top_type->compound);
3889                 if (entry != NULL) {
3890                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3891                         path->top_type = entry->declaration.type;
3892                 }
3893         } else {
3894                 assert(is_type_array(top_type));
3895                 assert(top_type->array.size > 0);
3896
3897                 top->index     = 0;
3898                 path->top_type = top_type->array.element_type;
3899                 len            = top_type->array.size;
3900         }
3901         if (initializer == NULL
3902                         || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3903                 initializer = create_initializer_compound(len);
3904                 /* we have to set the entry at the 2nd latest path entry... */
3905                 size_t path_len = ARR_LEN(path->path);
3906                 assert(path_len >= 1);
3907                 if (path_len > 1) {
3908                         type_path_entry_t *entry        = & path->path[path_len-2];
3909                         ir_initializer_t  *tinitializer = entry->initializer;
3910                         set_initializer_compound_value(tinitializer, entry->index,
3911                                                        initializer);
3912                 }
3913         }
3914         top->initializer = initializer;
3915 }
3916
3917 static void ascend_from_subtype(type_path_t *path)
3918 {
3919         type_path_entry_t *top = get_type_path_top(path);
3920
3921         path->top_type = top->type;
3922
3923         size_t len = ARR_LEN(path->path);
3924         ARR_RESIZE(type_path_entry_t, path->path, len-1);
3925 }
3926
3927 static void walk_designator(type_path_t *path, const designator_t *designator)
3928 {
3929         /* designators start at current object type */
3930         ARR_RESIZE(type_path_entry_t, path->path, 1);
3931
3932         for ( ; designator != NULL; designator = designator->next) {
3933                 type_path_entry_t *top         = get_type_path_top(path);
3934                 type_t            *orig_type   = top->type;
3935                 type_t            *type        = skip_typeref(orig_type);
3936
3937                 if (designator->symbol != NULL) {
3938                         assert(is_type_compound(type));
3939                         size_t    index  = 0;
3940                         symbol_t *symbol = designator->symbol;
3941
3942                         compound_t *compound = type->compound.compound;
3943                         entity_t   *iter     = compound->members.entities;
3944                         for ( ; iter != NULL; iter = iter->base.next, ++index) {
3945                                 if (iter->base.symbol == symbol) {
3946                                         assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3947                                         break;
3948                                 }
3949                         }
3950                         assert(iter != NULL);
3951
3952                         /* revert previous initialisations of other union elements */
3953                         if (type->kind == TYPE_COMPOUND_UNION) {
3954                                 ir_initializer_t *initializer = top->initializer;
3955                                 if (initializer != NULL
3956                                         && get_initializer_kind(initializer) == IR_INITIALIZER_COMPOUND) {
3957                                         /* are we writing to a new element? */
3958                                         ir_initializer_t *oldi
3959                                                 = get_initializer_compound_value(initializer, index);
3960                                         if (get_initializer_kind(oldi) == IR_INITIALIZER_NULL) {
3961                                                 /* clear initializer */
3962                                                 size_t len
3963                                                         = get_initializer_compound_n_entries(initializer);
3964                                                 ir_initializer_t *nulli = get_initializer_null();
3965                                                 for (size_t i = 0; i < len; ++i) {
3966                                                         set_initializer_compound_value(initializer, i,
3967                                                                                        nulli);
3968                                                 }
3969                                         }
3970                                 }
3971                         }
3972
3973                         top->type           = orig_type;
3974                         top->compound_entry = iter;
3975                         top->index          = index;
3976                         orig_type           = iter->declaration.type;
3977                 } else {
3978                         expression_t *array_index = designator->array_index;
3979                         assert(designator->array_index != NULL);
3980                         assert(is_type_array(type));
3981
3982                         long index = fold_constant_to_int(array_index);
3983                         assert(index >= 0);
3984 #ifndef NDEBUG
3985                         if (type->array.size_constant) {
3986                                 long array_size = type->array.size;
3987                                 assert(index < array_size);
3988                         }
3989 #endif
3990
3991                         top->type  = orig_type;
3992                         top->index = (size_t) index;
3993                         orig_type  = type->array.element_type;
3994                 }
3995                 path->top_type = orig_type;
3996
3997                 if (designator->next != NULL) {
3998                         descend_into_subtype(path);
3999                 }
4000         }
4001
4002         path->invalid  = false;
4003 }
4004
4005 static void advance_current_object(type_path_t *path)
4006 {
4007         if (path->invalid) {
4008                 /* TODO: handle this... */
4009                 panic("invalid initializer in ast2firm (excessive elements)");
4010         }
4011
4012         type_path_entry_t *top = get_type_path_top(path);
4013
4014         type_t *type = skip_typeref(top->type);
4015         if (is_type_union(type)) {
4016                 /* only the first element is initialized in unions */
4017                 top->compound_entry = NULL;
4018         } else if (is_type_struct(type)) {
4019                 entity_t *entry = top->compound_entry;
4020
4021                 top->index++;
4022                 entry               = entry->base.next;
4023                 top->compound_entry = entry;
4024                 if (entry != NULL) {
4025                         assert(entry->kind == ENTITY_COMPOUND_MEMBER);
4026                         path->top_type = entry->declaration.type;
4027                         return;
4028                 }
4029         } else {
4030                 assert(is_type_array(type));
4031
4032                 top->index++;
4033                 if (!type->array.size_constant || top->index < type->array.size) {
4034                         return;
4035                 }
4036         }
4037
4038         /* we're past the last member of the current sub-aggregate, try if we
4039          * can ascend in the type hierarchy and continue with another subobject */
4040         size_t len = ARR_LEN(path->path);
4041
4042         if (len > 1) {
4043                 ascend_from_subtype(path);
4044                 advance_current_object(path);
4045         } else {
4046                 path->invalid = true;
4047         }
4048 }
4049
4050
4051 static ir_initializer_t *create_ir_initializer(
4052                 const initializer_t *initializer, type_t *type);
4053
4054 static ir_initializer_t *create_ir_initializer_value(
4055                 const initializer_value_t *initializer)
4056 {
4057         if (is_type_compound(initializer->value->base.type)) {
4058                 panic("initializer creation for compounds not implemented yet");
4059         }
4060         type_t       *type = initializer->value->base.type;
4061         expression_t *expr = initializer->value;
4062         if (initializer_use_bitfield_basetype) {
4063                 type_t *skipped = skip_typeref(type);
4064                 if (skipped->kind == TYPE_BITFIELD) {
4065                         /* remove the bitfield cast... */
4066                         assert(expr->kind == EXPR_UNARY_CAST_IMPLICIT);
4067                         expr = expr->unary.value;
4068                         type = skipped->bitfield.base_type;
4069                 }
4070         }
4071         ir_node *value = expression_to_firm(expr);
4072         ir_mode *mode  = get_ir_mode_storage(type);
4073         value          = create_conv(NULL, value, mode);
4074         return create_initializer_const(value);
4075 }
4076
4077 /** test wether type can be initialized by a string constant */
4078 static bool is_string_type(type_t *type)
4079 {
4080         type_t *inner;
4081         if (is_type_pointer(type)) {
4082                 inner = skip_typeref(type->pointer.points_to);
4083         } else if(is_type_array(type)) {
4084                 inner = skip_typeref(type->array.element_type);
4085         } else {
4086                 return false;
4087         }
4088
4089         return is_type_integer(inner);
4090 }
4091
4092 static ir_initializer_t *create_ir_initializer_list(
4093                 const initializer_list_t *initializer, type_t *type)
4094 {
4095         type_path_t path;
4096         memset(&path, 0, sizeof(path));
4097         path.top_type = type;
4098         path.path     = NEW_ARR_F(type_path_entry_t, 0);
4099
4100         descend_into_subtype(&path);
4101
4102         for (size_t i = 0; i < initializer->len; ++i) {
4103                 const initializer_t *sub_initializer = initializer->initializers[i];
4104
4105                 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
4106                         walk_designator(&path, sub_initializer->designator.designator);
4107                         continue;
4108                 }
4109
4110                 if (sub_initializer->kind == INITIALIZER_VALUE) {
4111                         /* we might have to descend into types until we're at a scalar
4112                          * type */
4113                         while(true) {
4114                                 type_t *orig_top_type = path.top_type;
4115                                 type_t *top_type      = skip_typeref(orig_top_type);
4116
4117                                 if (is_type_scalar(top_type))
4118                                         break;
4119                                 descend_into_subtype(&path);
4120                         }
4121                 } else if (sub_initializer->kind == INITIALIZER_STRING
4122                                 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
4123                         /* we might have to descend into types until we're at a scalar
4124                          * type */
4125                         while (true) {
4126                                 type_t *orig_top_type = path.top_type;
4127                                 type_t *top_type      = skip_typeref(orig_top_type);
4128
4129                                 if (is_string_type(top_type))
4130                                         break;
4131                                 descend_into_subtype(&path);
4132                         }
4133                 }
4134
4135                 ir_initializer_t *sub_irinitializer
4136                         = create_ir_initializer(sub_initializer, path.top_type);
4137
4138                 size_t path_len = ARR_LEN(path.path);
4139                 assert(path_len >= 1);
4140                 type_path_entry_t *entry        = & path.path[path_len-1];
4141                 ir_initializer_t  *tinitializer = entry->initializer;
4142                 set_initializer_compound_value(tinitializer, entry->index,
4143                                                sub_irinitializer);
4144
4145                 advance_current_object(&path);
4146         }
4147
4148         assert(ARR_LEN(path.path) >= 1);
4149         ir_initializer_t *result = path.path[0].initializer;
4150         DEL_ARR_F(path.path);
4151
4152         return result;
4153 }
4154
4155 static ir_initializer_t *create_ir_initializer_string(
4156                 const initializer_string_t *initializer, type_t *type)
4157 {
4158         type = skip_typeref(type);
4159
4160         size_t            string_len    = initializer->string.size;
4161         assert(type->kind == TYPE_ARRAY);
4162         assert(type->array.size_constant);
4163         size_t            len           = type->array.size;
4164         ir_initializer_t *irinitializer = create_initializer_compound(len);
4165
4166         const char *string = initializer->string.begin;
4167         ir_mode    *mode   = get_ir_mode_storage(type->array.element_type);
4168
4169         for (size_t i = 0; i < len; ++i) {
4170                 char c = 0;
4171                 if (i < string_len)
4172                         c = string[i];
4173
4174                 ir_tarval        *tv = new_tarval_from_long(c, mode);
4175                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4176
4177                 set_initializer_compound_value(irinitializer, i, char_initializer);
4178         }
4179
4180         return irinitializer;
4181 }
4182
4183 static ir_initializer_t *create_ir_initializer_wide_string(
4184                 const initializer_wide_string_t *initializer, type_t *type)
4185 {
4186         assert(type->kind == TYPE_ARRAY);
4187         assert(type->array.size_constant);
4188         size_t            len           = type->array.size;
4189         size_t            string_len    = wstrlen(&initializer->string);
4190         ir_initializer_t *irinitializer = create_initializer_compound(len);
4191
4192         const char *p    = initializer->string.begin;
4193         ir_mode    *mode = get_type_mode(ir_type_wchar_t);
4194
4195         for (size_t i = 0; i < len; ++i) {
4196                 utf32 c = 0;
4197                 if (i < string_len) {
4198                         c = read_utf8_char(&p);
4199                 }
4200                 ir_tarval *tv = new_tarval_from_long(c, mode);
4201                 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
4202
4203                 set_initializer_compound_value(irinitializer, i, char_initializer);
4204         }
4205
4206         return irinitializer;
4207 }
4208
4209 static ir_initializer_t *create_ir_initializer(
4210                 const initializer_t *initializer, type_t *type)
4211 {
4212         switch(initializer->kind) {
4213                 case INITIALIZER_STRING:
4214                         return create_ir_initializer_string(&initializer->string, type);
4215
4216                 case INITIALIZER_WIDE_STRING:
4217                         return create_ir_initializer_wide_string(&initializer->wide_string,
4218                                                                  type);
4219
4220                 case INITIALIZER_LIST:
4221                         return create_ir_initializer_list(&initializer->list, type);
4222
4223                 case INITIALIZER_VALUE:
4224                         return create_ir_initializer_value(&initializer->value);
4225
4226                 case INITIALIZER_DESIGNATOR:
4227                         panic("unexpected designator initializer found");
4228         }
4229         panic("unknown initializer");
4230 }
4231
4232 /** ANSI C §6.7.8:21: If there are fewer initializers [..] than there
4233  *  are elements [...] the remainder of the aggregate shall be initialized
4234  *  implicitly the same as objects that have static storage duration. */
4235 static void create_dynamic_null_initializer(ir_entity *entity, dbg_info *dbgi,
4236                 ir_node *base_addr)
4237 {
4238         /* for unions we must NOT do anything for null initializers */
4239         ir_type *owner = get_entity_owner(entity);
4240         if (is_Union_type(owner)) {
4241                 return;
4242         }
4243
4244         ir_type *ent_type = get_entity_type(entity);
4245         /* create sub-initializers for a compound type */
4246         if (is_compound_type(ent_type)) {
4247                 unsigned n_members = get_compound_n_members(ent_type);
4248                 for (unsigned n = 0; n < n_members; ++n) {
4249                         ir_entity *member = get_compound_member(ent_type, n);
4250                         ir_node   *addr   = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4251                                                                 member);
4252                         create_dynamic_null_initializer(member, dbgi, addr);
4253                 }
4254                 return;
4255         }
4256         if (is_Array_type(ent_type)) {
4257                 assert(has_array_upper_bound(ent_type, 0));
4258                 long n = get_array_upper_bound_int(ent_type, 0);
4259                 for (long i = 0; i < n; ++i) {
4260                         ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4261                         ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4262                         ir_node   *in[1]    = { cnst };
4263                         ir_entity *arrent   = get_array_element_entity(ent_type);
4264                         ir_node   *addr     = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4265                                                         arrent);
4266                         create_dynamic_null_initializer(arrent, dbgi, addr);
4267                 }
4268                 return;
4269         }
4270
4271         ir_mode *value_mode = get_type_mode(ent_type);
4272         ir_node *node       = new_Const(get_mode_null(value_mode));
4273
4274         /* is it a bitfield type? */
4275         if (is_Primitive_type(ent_type) &&
4276                         get_primitive_base_type(ent_type) != NULL) {
4277                 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4278                 return;
4279         }
4280
4281         ir_node *mem    = get_store();
4282         ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4283         ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4284         set_store(proj_m);
4285 }
4286
4287 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
4288                 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
4289 {
4290         switch(get_initializer_kind(initializer)) {
4291         case IR_INITIALIZER_NULL:
4292                 create_dynamic_null_initializer(entity, dbgi, base_addr);
4293                 return;
4294         case IR_INITIALIZER_CONST: {
4295                 ir_node *node     = get_initializer_const_value(initializer);
4296                 ir_type *ent_type = get_entity_type(entity);
4297
4298                 /* is it a bitfield type? */
4299                 if (is_Primitive_type(ent_type) &&
4300                                 get_primitive_base_type(ent_type) != NULL) {
4301                         bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
4302                         return;
4303                 }
4304
4305                 assert(get_type_mode(type) == get_irn_mode(node));
4306                 ir_node *mem    = get_store();
4307                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, node, cons_none);
4308                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4309                 set_store(proj_m);
4310                 return;
4311         }
4312         case IR_INITIALIZER_TARVAL: {
4313                 ir_tarval *tv       = get_initializer_tarval_value(initializer);
4314                 ir_node   *cnst     = new_d_Const(dbgi, tv);
4315                 ir_type   *ent_type = get_entity_type(entity);
4316
4317                 /* is it a bitfield type? */
4318                 if (is_Primitive_type(ent_type) &&
4319                                 get_primitive_base_type(ent_type) != NULL) {
4320                         bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
4321                         return;
4322                 }
4323
4324                 assert(get_type_mode(type) == get_tarval_mode(tv));
4325                 ir_node *mem    = get_store();
4326                 ir_node *store  = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
4327                 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
4328                 set_store(proj_m);
4329                 return;
4330         }
4331         case IR_INITIALIZER_COMPOUND: {
4332                 assert(is_compound_type(type) || is_Array_type(type));
4333                 int n_members;
4334                 if (is_Array_type(type)) {
4335                         assert(has_array_upper_bound(type, 0));
4336                         n_members = get_array_upper_bound_int(type, 0);
4337                 } else {
4338                         n_members = get_compound_n_members(type);
4339                 }
4340
4341                 if (get_initializer_compound_n_entries(initializer)
4342                                 != (unsigned) n_members)
4343                         panic("initializer doesn't match compound type");
4344
4345                 for (int i = 0; i < n_members; ++i) {
4346                         ir_node   *addr;
4347                         ir_type   *irtype;
4348                         ir_entity *sub_entity;
4349                         if (is_Array_type(type)) {
4350                                 ir_tarval *index_tv = new_tarval_from_long(i, mode_uint);
4351                                 ir_node   *cnst     = new_d_Const(dbgi, index_tv);
4352                                 ir_node   *in[1]    = { cnst };
4353                                 irtype     = get_array_element_type(type);
4354                                 sub_entity = get_array_element_entity(type);
4355                                 addr       = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4356                                                        sub_entity);
4357                         } else {
4358                                 sub_entity = get_compound_member(type, i);
4359                                 irtype     = get_entity_type(sub_entity);
4360                                 addr       = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4361                                                              sub_entity);
4362                         }
4363
4364                         ir_initializer_t *sub_init
4365                                 = get_initializer_compound_value(initializer, i);
4366
4367                         create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4368                                                        addr);
4369                 }
4370                 return;
4371         }
4372         }
4373
4374         panic("invalid IR_INITIALIZER found");
4375 }
4376
4377 static void create_dynamic_initializer(ir_initializer_t *initializer,
4378                 dbg_info *dbgi, ir_entity *entity)
4379 {
4380         ir_node *frame     = get_irg_frame(current_ir_graph);
4381         ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4382         ir_type *type      = get_entity_type(entity);
4383
4384         create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4385 }
4386
4387 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4388                                      ir_entity *entity, type_t *type)
4389 {
4390         ir_node *memory = get_store();
4391         ir_node *nomem  = new_NoMem();
4392         ir_node *frame  = get_irg_frame(current_ir_graph);
4393         ir_node *addr   = new_d_simpleSel(dbgi, nomem, frame, entity);
4394
4395         if (initializer->kind == INITIALIZER_VALUE) {
4396                 initializer_value_t *initializer_value = &initializer->value;
4397
4398                 ir_node *value = expression_to_firm(initializer_value->value);
4399                 type = skip_typeref(type);
4400                 assign_value(dbgi, addr, type, value);
4401                 return;
4402         }
4403
4404         if (is_constant_initializer(initializer) == EXPR_CLASS_VARIABLE) {
4405                 bool old_initializer_use_bitfield_basetype
4406                         = initializer_use_bitfield_basetype;
4407                 initializer_use_bitfield_basetype = true;
4408                 ir_initializer_t *irinitializer
4409                         = create_ir_initializer(initializer, type);
4410                 initializer_use_bitfield_basetype
4411                         = old_initializer_use_bitfield_basetype;
4412
4413                 create_dynamic_initializer(irinitializer, dbgi, entity);
4414                 return;
4415         }
4416
4417         /* create the ir_initializer */
4418         ir_graph *const old_current_ir_graph = current_ir_graph;
4419         current_ir_graph = get_const_code_irg();
4420
4421         ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4422
4423         assert(current_ir_graph == get_const_code_irg());
4424         current_ir_graph = old_current_ir_graph;
4425
4426         /* create a "template" entity which is copied to the entity on the stack */
4427         ident     *const id          = id_unique("initializer.%u");
4428         ir_type   *const irtype      = get_ir_type(type);
4429         ir_type   *const global_type = get_glob_type();
4430         ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4431         set_entity_ld_ident(init_entity, id);
4432
4433         set_entity_visibility(init_entity, ir_visibility_private);
4434         add_entity_linkage(init_entity, IR_LINKAGE_CONSTANT);
4435
4436         set_entity_initializer(init_entity, irinitializer);
4437
4438         ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4439         ir_node *const copyb    = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4440
4441         ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M);
4442         set_store(copyb_mem);
4443 }
4444
4445 static void create_initializer_local_variable_entity(entity_t *entity)
4446 {
4447         assert(entity->kind == ENTITY_VARIABLE);
4448         initializer_t *initializer = entity->variable.initializer;
4449         dbg_info      *dbgi        = get_dbg_info(&entity->base.source_position);
4450         ir_entity     *irentity    = entity->variable.v.entity;
4451         type_t        *type        = entity->declaration.type;
4452
4453         create_local_initializer(initializer, dbgi, irentity, type);
4454 }
4455
4456 static void create_variable_initializer(entity_t *entity)
4457 {
4458         assert(entity->kind == ENTITY_VARIABLE);
4459         initializer_t *initializer = entity->variable.initializer;
4460         if (initializer == NULL)
4461                 return;
4462
4463         declaration_kind_t declaration_kind
4464                 = (declaration_kind_t) entity->declaration.kind;
4465         if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4466                 create_initializer_local_variable_entity(entity);
4467                 return;
4468         }
4469
4470         type_t            *type = entity->declaration.type;
4471         type_qualifiers_t  tq   = get_type_qualifier(type, true);
4472
4473         if (initializer->kind == INITIALIZER_VALUE) {
4474                 initializer_value_t *initializer_value = &initializer->value;
4475                 dbg_info            *dbgi = get_dbg_info(&entity->base.source_position);
4476
4477                 ir_node *value = expression_to_firm(initializer_value->value);
4478
4479                 type_t  *type = initializer_value->value->base.type;
4480                 ir_mode *mode = get_ir_mode_storage(type);
4481                 value = create_conv(dbgi, value, mode);
4482                 value = do_strict_conv(dbgi, value);
4483
4484                 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4485                         set_value(entity->variable.v.value_number, value);
4486                 } else {
4487                         assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4488
4489                         ir_entity *irentity = entity->variable.v.entity;
4490
4491                         if (tq & TYPE_QUALIFIER_CONST
4492                                         && get_entity_owner(irentity) != get_tls_type()) {
4493                                 add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4494                         }
4495                         set_atomic_ent_value(irentity, value);
4496                 }
4497         } else {
4498                 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4499                        declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4500
4501                 ir_entity        *irentity        = entity->variable.v.entity;
4502                 ir_initializer_t *irinitializer
4503                         = create_ir_initializer(initializer, type);
4504
4505                 if (tq & TYPE_QUALIFIER_CONST) {
4506                         add_entity_linkage(irentity, IR_LINKAGE_CONSTANT);
4507                 }
4508                 set_entity_initializer(irentity, irinitializer);
4509         }
4510 }
4511
4512 static void create_variable_length_array(entity_t *entity)
4513 {
4514         assert(entity->kind == ENTITY_VARIABLE);
4515         assert(entity->variable.initializer == NULL);
4516
4517         entity->declaration.kind    = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4518         entity->variable.v.vla_base = NULL;
4519
4520         /* TODO: record VLA somewhere so we create the free node when we leave
4521          * it's scope */
4522 }
4523
4524 static void allocate_variable_length_array(entity_t *entity)
4525 {
4526         assert(entity->kind == ENTITY_VARIABLE);
4527         assert(entity->variable.initializer == NULL);
4528         assert(get_cur_block() != NULL);
4529
4530         dbg_info *dbgi      = get_dbg_info(&entity->base.source_position);
4531         type_t   *type      = entity->declaration.type;
4532         ir_type  *el_type   = get_ir_type(type->array.element_type);
4533
4534         /* make sure size_node is calculated */
4535         get_type_size_node(type);
4536         ir_node  *elems = type->array.size_node;
4537         ir_node  *mem   = get_store();
4538         ir_node  *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4539
4540         ir_node  *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4541         ir_node  *addr   = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4542         set_store(proj_m);
4543
4544         assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4545         entity->variable.v.vla_base = addr;
4546 }
4547
4548 /**
4549  * Creates a Firm local variable from a declaration.
4550  */
4551 static void create_local_variable(entity_t *entity)
4552 {
4553         assert(entity->kind == ENTITY_VARIABLE);
4554         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4555
4556         bool needs_entity = entity->variable.address_taken;
4557         type_t *type = skip_typeref(entity->declaration.type);
4558
4559         /* is it a variable length array? */
4560         if (is_type_array(type) && !type->array.size_constant) {
4561                 create_variable_length_array(entity);
4562                 return;
4563         } else if (is_type_array(type) || is_type_compound(type)) {
4564                 needs_entity = true;
4565         } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4566                 needs_entity = true;
4567         }
4568
4569         if (needs_entity) {
4570                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4571                 create_variable_entity(entity,
4572                                        DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4573                                        frame_type);
4574         } else {
4575                 entity->declaration.kind        = DECLARATION_KIND_LOCAL_VARIABLE;
4576                 entity->variable.v.value_number = next_value_number_function;
4577                 set_irg_loc_description(current_ir_graph, next_value_number_function,
4578                                         entity);
4579                 ++next_value_number_function;
4580         }
4581 }
4582
4583 static void create_local_static_variable(entity_t *entity)
4584 {
4585         assert(entity->kind == ENTITY_VARIABLE);
4586         assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4587
4588         type_t   *type           = skip_typeref(entity->declaration.type);
4589         ir_type  *const var_type = entity->variable.thread_local ?
4590                 get_tls_type() : get_glob_type();
4591         ir_type  *const irtype   = get_ir_type(type);
4592         dbg_info *const dbgi     = get_dbg_info(&entity->base.source_position);
4593
4594         size_t l = strlen(entity->base.symbol->string);
4595         char   buf[l + sizeof(".%u")];
4596         snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4597         ident     *const id       = id_unique(buf);
4598         ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4599
4600         if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4601                 set_entity_volatility(irentity, volatility_is_volatile);
4602         }
4603
4604         entity->declaration.kind  = DECLARATION_KIND_GLOBAL_VARIABLE;
4605         entity->variable.v.entity = irentity;
4606
4607         set_entity_ld_ident(irentity, id);
4608         set_entity_visibility(irentity, ir_visibility_local);
4609
4610         ir_graph *const old_current_ir_graph = current_ir_graph;
4611         current_ir_graph = get_const_code_irg();
4612
4613         create_variable_initializer(entity);
4614
4615         assert(current_ir_graph == get_const_code_irg());
4616         current_ir_graph = old_current_ir_graph;
4617 }
4618
4619
4620
4621 static void return_statement_to_firm(return_statement_t *statement)
4622 {
4623         if (get_cur_block() == NULL)
4624                 return;
4625
4626         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
4627         type_t   *type        = current_function_entity->declaration.type;
4628         ir_type  *func_irtype = get_ir_type(type);
4629
4630
4631         ir_node *in[1];
4632         int      in_len;
4633         if (get_method_n_ress(func_irtype) > 0) {
4634                 ir_type *res_type = get_method_res_type(func_irtype, 0);
4635
4636                 if (statement->value != NULL) {
4637                         ir_node *node = expression_to_firm(statement->value);
4638                         if (!is_compound_type(res_type)) {
4639                                 type_t  *type = statement->value->base.type;
4640                                 ir_mode *mode = get_ir_mode_storage(type);
4641                                 node          = create_conv(dbgi, node, mode);
4642                                 node          = do_strict_conv(dbgi, node);
4643                         }
4644                         in[0] = node;
4645                 } else {
4646                         ir_mode *mode;
4647                         if (is_compound_type(res_type)) {
4648                                 mode = mode_P_data;
4649                         } else {
4650                                 mode = get_type_mode(res_type);
4651                         }
4652                         in[0] = new_Unknown(mode);
4653                 }
4654                 in_len = 1;
4655         } else {
4656                 /* build return_value for its side effects */
4657                 if (statement->value != NULL) {
4658                         expression_to_firm(statement->value);
4659                 }
4660                 in_len = 0;
4661         }
4662
4663         ir_node  *store = get_store();
4664         ir_node  *ret   = new_d_Return(dbgi, store, in_len, in);
4665
4666         ir_node *end_block = get_irg_end_block(current_ir_graph);
4667         add_immBlock_pred(end_block, ret);
4668
4669         set_cur_block(NULL);
4670 }
4671
4672 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4673 {
4674         if (get_cur_block() == NULL)
4675                 return NULL;
4676
4677         return expression_to_firm(statement->expression);
4678 }
4679
4680 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4681 {
4682         entity_t *entity = compound->scope.entities;
4683         for ( ; entity != NULL; entity = entity->base.next) {
4684                 if (!is_declaration(entity))
4685                         continue;
4686
4687                 create_local_declaration(entity);
4688         }
4689
4690         ir_node     *result    = NULL;
4691         statement_t *statement = compound->statements;
4692         for ( ; statement != NULL; statement = statement->base.next) {
4693                 if (statement->base.next == NULL
4694                                 && statement->kind == STATEMENT_EXPRESSION) {
4695                         result = expression_statement_to_firm(
4696                                         &statement->expression);
4697                         break;
4698                 }
4699                 statement_to_firm(statement);
4700         }
4701
4702         return result;
4703 }
4704
4705 static void create_global_variable(entity_t *entity)
4706 {
4707         ir_linkage    linkage    = IR_LINKAGE_DEFAULT;
4708         ir_visibility visibility = ir_visibility_default;
4709         ir_entity    *irentity;
4710         assert(entity->kind == ENTITY_VARIABLE);
4711
4712         switch ((storage_class_tag_t)entity->declaration.storage_class) {
4713         case STORAGE_CLASS_EXTERN: visibility = ir_visibility_external; break;
4714         case STORAGE_CLASS_STATIC: visibility = ir_visibility_local;    break;
4715         case STORAGE_CLASS_NONE:
4716                 visibility = ir_visibility_default;
4717                 /* uninitialized globals get merged in C */
4718                 if (entity->variable.initializer == NULL)
4719                         linkage |= IR_LINKAGE_MERGE;
4720                 break;
4721         case STORAGE_CLASS_TYPEDEF:
4722         case STORAGE_CLASS_AUTO:
4723         case STORAGE_CLASS_REGISTER:
4724                 panic("invalid storage class for global var");
4725         }
4726
4727         ir_type *var_type = get_glob_type();
4728         if (entity->variable.thread_local) {
4729                 var_type = get_tls_type();
4730                 /* LINKAGE_MERGE not supported by current linkers */
4731                 linkage &= ~IR_LINKAGE_MERGE;
4732         }
4733         create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4734         irentity = entity->variable.v.entity;
4735         add_entity_linkage(irentity, linkage);
4736         set_entity_visibility(irentity, visibility);
4737 }
4738
4739 static void create_local_declaration(entity_t *entity)
4740 {
4741         assert(is_declaration(entity));
4742
4743         /* construct type */
4744         (void) get_ir_type(entity->declaration.type);
4745         if (entity->base.symbol == NULL) {
4746                 return;
4747         }
4748
4749         switch ((storage_class_tag_t) entity->declaration.storage_class) {
4750         case STORAGE_CLASS_STATIC:
4751                 if (entity->kind == ENTITY_FUNCTION) {
4752                         (void)get_function_entity(entity, NULL);
4753                 } else {
4754                         create_local_static_variable(entity);
4755                 }
4756                 return;
4757         case STORAGE_CLASS_EXTERN:
4758                 if (entity->kind == ENTITY_FUNCTION) {
4759                         assert(entity->function.statement == NULL);
4760                         (void)get_function_entity(entity, NULL);
4761                 } else {
4762                         create_global_variable(entity);
4763                         create_variable_initializer(entity);
4764                 }
4765                 return;
4766         case STORAGE_CLASS_NONE:
4767         case STORAGE_CLASS_AUTO:
4768         case STORAGE_CLASS_REGISTER:
4769                 if (entity->kind == ENTITY_FUNCTION) {
4770                         if (entity->function.statement != NULL) {
4771                                 ir_type *owner = get_irg_frame_type(current_ir_graph);
4772                                 (void)get_function_entity(entity, owner);
4773                                 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4774                                 enqueue_inner_function(entity);
4775                         } else {
4776                                 (void)get_function_entity(entity, NULL);
4777                         }
4778                 } else {
4779                         create_local_variable(entity);
4780                 }
4781                 return;
4782         case STORAGE_CLASS_TYPEDEF:
4783                 break;
4784         }
4785         panic("invalid storage class found");
4786 }
4787
4788 static void initialize_local_declaration(entity_t *entity)
4789 {
4790         if (entity->base.symbol == NULL)
4791                 return;
4792
4793         // no need to emit code in dead blocks
4794         if (entity->declaration.storage_class != STORAGE_CLASS_STATIC
4795                         && get_cur_block() == NULL)
4796                 return;
4797
4798         switch ((declaration_kind_t) entity->declaration.kind) {
4799         case DECLARATION_KIND_LOCAL_VARIABLE:
4800         case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4801                 create_variable_initializer(entity);
4802                 return;
4803
4804         case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4805                 allocate_variable_length_array(entity);
4806                 return;
4807
4808         case DECLARATION_KIND_COMPOUND_MEMBER:
4809         case DECLARATION_KIND_GLOBAL_VARIABLE:
4810         case DECLARATION_KIND_FUNCTION:
4811         case DECLARATION_KIND_INNER_FUNCTION:
4812                 return;
4813
4814         case DECLARATION_KIND_PARAMETER:
4815         case DECLARATION_KIND_PARAMETER_ENTITY:
4816                 panic("can't initialize parameters");
4817
4818         case DECLARATION_KIND_UNKNOWN:
4819                 panic("can't initialize unknown declaration");
4820         }
4821         panic("invalid declaration kind");
4822 }
4823
4824 static void declaration_statement_to_firm(declaration_statement_t *statement)
4825 {
4826         entity_t *entity = statement->declarations_begin;
4827         if (entity == NULL)
4828                 return;
4829
4830         entity_t *const last = statement->declarations_end;
4831         for ( ;; entity = entity->base.next) {
4832                 if (is_declaration(entity)) {
4833                         initialize_local_declaration(entity);
4834                 } else if (entity->kind == ENTITY_TYPEDEF) {
4835                         /* §6.7.7:3  Any array size expressions associated with variable length
4836                          * array declarators are evaluated each time the declaration of the
4837                          * typedef name is reached in the order of execution. */
4838                         type_t *const type = skip_typeref(entity->typedefe.type);
4839                         if (is_type_array(type) && type->array.is_vla)
4840                                 get_vla_size(&type->array);
4841                 }
4842                 if (entity == last)
4843                         break;
4844         }
4845 }
4846
4847 static void if_statement_to_firm(if_statement_t *statement)
4848 {
4849         /* Create the condition. */
4850         ir_node *true_block  = NULL;
4851         ir_node *false_block = NULL;
4852         if (get_cur_block() != NULL) {
4853                 true_block  = new_immBlock();
4854                 false_block = new_immBlock();
4855                 create_condition_evaluation(statement->condition, true_block, false_block);
4856                 mature_immBlock(true_block);
4857         }
4858
4859         /* Create the false statement.
4860          * Hadle false before true, so if no false statement is present, then the
4861          * empty false block is reused as fallthrough block. */
4862         ir_node *fallthrough_block = NULL;
4863         if (statement->false_statement != NULL) {
4864                 if (false_block != NULL) {
4865                         mature_immBlock(false_block);
4866                 }
4867                 set_cur_block(false_block);
4868                 statement_to_firm(statement->false_statement);
4869                 if (get_cur_block() != NULL) {
4870                         fallthrough_block = new_immBlock();
4871                         add_immBlock_pred(fallthrough_block, new_Jmp());
4872                 }
4873         } else {
4874                 fallthrough_block = false_block;
4875         }
4876
4877         /* Create the true statement. */
4878         set_cur_block(true_block);
4879         statement_to_firm(statement->true_statement);
4880         if (get_cur_block() != NULL) {
4881                 if (fallthrough_block == NULL) {
4882                         fallthrough_block = new_immBlock();
4883                 }
4884                 add_immBlock_pred(fallthrough_block, new_Jmp());
4885         }
4886
4887         /* Handle the block after the if-statement. */
4888         if (fallthrough_block != NULL) {
4889                 mature_immBlock(fallthrough_block);
4890         }
4891         set_cur_block(fallthrough_block);
4892 }
4893
4894 /* Create a jump node which jumps into target_block, if the current block is
4895  * reachable. */
4896 static void jump_if_reachable(ir_node *const target_block)
4897 {
4898         if (get_cur_block() != NULL) {
4899                 add_immBlock_pred(target_block, new_Jmp());
4900         }
4901 }
4902
4903 static void while_statement_to_firm(while_statement_t *statement)
4904 {
4905         /* Create the header block */
4906         ir_node *const header_block = new_immBlock();
4907         jump_if_reachable(header_block);
4908
4909         /* Create the condition. */
4910         ir_node      *      body_block;
4911         ir_node      *      false_block;
4912         expression_t *const cond = statement->condition;
4913         if (is_constant_expression(cond) == EXPR_CLASS_CONSTANT &&
4914                         fold_constant_to_bool(cond)) {
4915                 /* Shortcut for while (true). */
4916                 body_block  = header_block;
4917                 false_block = NULL;
4918
4919                 keep_alive(header_block);
4920                 keep_all_memory(header_block);
4921         } else {
4922                 body_block  = new_immBlock();
4923                 false_block = new_immBlock();
4924
4925                 set_cur_block(header_block);
4926                 create_condition_evaluation(cond, body_block, false_block);
4927                 mature_immBlock(body_block);
4928         }
4929
4930         ir_node *const old_continue_label = continue_label;
4931         ir_node *const old_break_label    = break_label;
4932         continue_label = header_block;
4933         break_label    = false_block;
4934
4935         /* Create the loop body. */
4936         set_cur_block(body_block);
4937         statement_to_firm(statement->body);
4938         jump_if_reachable(header_block);
4939
4940         mature_immBlock(header_block);
4941         assert(false_block == NULL || false_block == break_label);
4942         false_block = break_label;
4943         if (false_block != NULL) {
4944                 mature_immBlock(false_block);
4945         }
4946         set_cur_block(false_block);
4947
4948         assert(continue_label == header_block);
4949         continue_label = old_continue_label;
4950         break_label    = old_break_label;
4951 }
4952
4953 static ir_node *get_break_label(void)
4954 {
4955         if (break_label == NULL) {
4956                 break_label = new_immBlock();
4957         }
4958         return break_label;
4959 }
4960
4961 static void do_while_statement_to_firm(do_while_statement_t *statement)
4962 {
4963         /* create the header block */
4964         ir_node *header_block = new_immBlock();
4965
4966         /* the loop body */
4967         ir_node *body_block = new_immBlock();
4968         jump_if_reachable(body_block);
4969
4970         ir_node *old_continue_label = continue_label;
4971         ir_node *old_break_label    = break_label;
4972         continue_label              = header_block;
4973         break_label                 = NULL;
4974
4975         set_cur_block(body_block);
4976         statement_to_firm(statement->body);
4977         ir_node *const false_block = get_break_label();
4978
4979         assert(continue_label == header_block);
4980         continue_label = old_continue_label;
4981         break_label    = old_break_label;
4982
4983         jump_if_reachable(header_block);
4984
4985         /* create the condition */
4986         mature_immBlock(header_block);
4987         set_cur_block(header_block);
4988
4989         create_condition_evaluation(statement->condition, body_block, false_block);
4990         mature_immBlock(body_block);
4991         mature_immBlock(false_block);
4992
4993         set_cur_block(false_block);
4994 }
4995
4996 static void for_statement_to_firm(for_statement_t *statement)
4997 {
4998         /* create declarations */
4999         entity_t *entity = statement->scope.entities;
5000         for ( ; entity != NULL; entity = entity->base.next) {
5001                 if (!is_declaration(entity))
5002                         continue;
5003
5004                 create_local_declaration(entity);
5005         }
5006
5007         if (get_cur_block() != NULL) {
5008                 entity = statement->scope.entities;
5009                 for ( ; entity != NULL; entity = entity->base.next) {
5010                         if (!is_declaration(entity))
5011                                 continue;
5012
5013                         initialize_local_declaration(entity);
5014                 }
5015
5016                 if (statement->initialisation != NULL) {
5017                         expression_to_firm(statement->initialisation);
5018                 }
5019         }
5020
5021         /* Create the header block */
5022         ir_node *const header_block = new_immBlock();
5023         jump_if_reachable(header_block);
5024
5025         /* Create the condition. */
5026         ir_node *body_block;
5027         ir_node *false_block;
5028         if (statement->condition != NULL) {
5029                 body_block  = new_immBlock();
5030                 false_block = new_immBlock();
5031
5032                 set_cur_block(header_block);
5033                 create_condition_evaluation(statement->condition, body_block, false_block);
5034                 mature_immBlock(body_block);
5035         } else {
5036                 /* for-ever. */
5037                 body_block  = header_block;
5038                 false_block = NULL;
5039
5040                 keep_alive(header_block);
5041                 keep_all_memory(header_block);
5042         }
5043
5044         /* Create the step block, if necessary. */
5045         ir_node      *      step_block = header_block;
5046         expression_t *const step       = statement->step;
5047         if (step != NULL) {
5048                 step_block = new_immBlock();
5049         }
5050
5051         ir_node *const old_continue_label = continue_label;
5052         ir_node *const old_break_label    = break_label;
5053         continue_label = step_block;
5054         break_label    = false_block;
5055
5056         /* Create the loop body. */
5057         set_cur_block(body_block);
5058         statement_to_firm(statement->body);
5059         jump_if_reachable(step_block);
5060
5061         /* Create the step code. */
5062         if (step != NULL) {
5063                 mature_immBlock(step_block);
5064                 set_cur_block(step_block);
5065                 expression_to_firm(step);
5066                 jump_if_reachable(header_block);
5067         }
5068
5069         mature_immBlock(header_block);
5070         assert(false_block == NULL || false_block == break_label);
5071         false_block = break_label;
5072         if (false_block != NULL) {
5073                 mature_immBlock(false_block);
5074         }
5075         set_cur_block(false_block);
5076
5077         assert(continue_label == step_block);
5078         continue_label = old_continue_label;
5079         break_label    = old_break_label;
5080 }
5081
5082 static void create_jump_statement(const statement_t *statement,
5083                                   ir_node *target_block)
5084 {
5085         if (get_cur_block() == NULL)
5086                 return;
5087
5088         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5089         ir_node  *jump = new_d_Jmp(dbgi);
5090         add_immBlock_pred(target_block, jump);
5091
5092         set_cur_block(NULL);
5093 }
5094
5095 static void switch_statement_to_firm(switch_statement_t *statement)
5096 {
5097         ir_node  *first_block = NULL;
5098         dbg_info *dbgi        = get_dbg_info(&statement->base.source_position);
5099         ir_node  *cond        = NULL;
5100
5101         if (get_cur_block() != NULL) {
5102                 ir_node *expression = expression_to_firm(statement->expression);
5103                 cond                = new_d_Cond(dbgi, expression);
5104                 first_block         = get_cur_block();
5105         }
5106
5107         set_cur_block(NULL);
5108
5109         ir_node *const old_switch_cond       = current_switch_cond;
5110         ir_node *const old_break_label       = break_label;
5111         const bool     old_saw_default_label = saw_default_label;
5112         saw_default_label                    = false;
5113         current_switch_cond                  = cond;
5114         break_label                          = NULL;
5115         switch_statement_t *const old_switch = current_switch;
5116         current_switch                       = statement;
5117
5118         /* determine a free number for the default label */
5119         unsigned long num_cases       = 0;
5120         long          default_proj_nr = 0;
5121         for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5122                 if (l->expression == NULL) {
5123                         /* default case */
5124                         continue;
5125                 }
5126                 if (l->last_case >= l->first_case)
5127                         num_cases += l->last_case - l->first_case + 1;
5128                 if (l->last_case > default_proj_nr)
5129                         default_proj_nr = l->last_case;
5130         }
5131
5132         if (default_proj_nr == INT_MAX) {
5133                 /* Bad: an overflow will occur, we cannot be sure that the
5134                  * maximum + 1 is a free number. Scan the values a second
5135                  * time to find a free number.
5136                  */
5137                 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
5138
5139                 memset(bits, 0, (num_cases + 7) >> 3);
5140                 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
5141                         if (l->expression == NULL) {
5142                                 /* default case */
5143                                 continue;
5144                         }
5145                         unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
5146                         if (start < num_cases && l->last_case >= 0) {
5147                                 unsigned long end  = (unsigned long)l->last_case < num_cases ?
5148                                         (unsigned long)l->last_case : num_cases - 1;
5149                                 for (unsigned long cns = start; cns <= end; ++cns) {
5150                                         bits[cns >> 3] |= (1 << (cns & 7));
5151                                 }
5152                         }
5153                 }
5154                 /* We look at the first num_cases constants:
5155                  * Either they are dense, so we took the last (num_cases)
5156                  * one, or they are not dense, so we will find one free
5157                  * there...
5158                  */
5159                 unsigned long i;
5160                 for (i = 0; i < num_cases; ++i)
5161                         if ((bits[i >> 3] & (1 << (i & 7))) == 0)
5162                                 break;
5163
5164                 free(bits);
5165                 default_proj_nr = i;
5166         } else {
5167                 ++default_proj_nr;
5168         }
5169         statement->default_proj_nr = default_proj_nr;
5170         /* safety check: cond might already be folded to a Bad */
5171         if (cond != NULL && is_Cond(cond)) {
5172                 set_Cond_default_proj(cond, default_proj_nr);
5173         }
5174
5175         statement_to_firm(statement->body);
5176
5177         jump_if_reachable(get_break_label());
5178
5179         if (!saw_default_label && first_block != NULL) {
5180                 set_cur_block(first_block);
5181                 ir_node *const proj = new_d_Proj(dbgi, cond, mode_X, default_proj_nr);
5182                 add_immBlock_pred(get_break_label(), proj);
5183         }
5184
5185         if (break_label != NULL) {
5186                 mature_immBlock(break_label);
5187         }
5188         set_cur_block(break_label);
5189
5190         assert(current_switch_cond == cond);
5191         current_switch      = old_switch;
5192         current_switch_cond = old_switch_cond;
5193         break_label         = old_break_label;
5194         saw_default_label   = old_saw_default_label;
5195 }
5196
5197 static void case_label_to_firm(const case_label_statement_t *statement)
5198 {
5199         if (statement->is_empty_range)
5200                 return;
5201
5202         ir_node *block = new_immBlock();
5203         /* Fallthrough from previous case */
5204         jump_if_reachable(block);
5205
5206         if (current_switch_cond != NULL) {
5207                 set_cur_block(get_nodes_block(current_switch_cond));
5208                 dbg_info *const dbgi = get_dbg_info(&statement->base.source_position);
5209                 if (statement->expression != NULL) {
5210                         long pn     = statement->first_case;
5211                         long end_pn = statement->last_case;
5212                         assert(pn <= end_pn);
5213                         /* create jumps for all cases in the given range */
5214                         do {
5215                                 ir_node *const proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
5216                                 add_immBlock_pred(block, proj);
5217                         } while (pn++ < end_pn);
5218                 } else {
5219                         saw_default_label = true;
5220                         ir_node *const proj = new_d_Proj(dbgi, current_switch_cond, mode_X,
5221                                                          current_switch->default_proj_nr);
5222                         add_immBlock_pred(block, proj);
5223                 }
5224         }
5225
5226         mature_immBlock(block);
5227         set_cur_block(block);
5228
5229         statement_to_firm(statement->statement);
5230 }
5231
5232 static void label_to_firm(const label_statement_t *statement)
5233 {
5234         ir_node *block = get_label_block(statement->label);
5235         jump_if_reachable(block);
5236
5237         set_cur_block(block);
5238         keep_alive(block);
5239         keep_all_memory(block);
5240
5241         statement_to_firm(statement->statement);
5242 }
5243
5244 static void goto_to_firm(const goto_statement_t *statement)
5245 {
5246         if (get_cur_block() == NULL)
5247                 return;
5248
5249         if (statement->expression) {
5250                 ir_node  *irn  = expression_to_firm(statement->expression);
5251                 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5252                 ir_node  *ijmp = new_d_IJmp(dbgi, irn);
5253
5254                 set_irn_link(ijmp, ijmp_list);
5255                 ijmp_list = ijmp;
5256         } else {
5257                 ir_node *block = get_label_block(statement->label);
5258                 ir_node *jmp   = new_Jmp();
5259                 add_immBlock_pred(block, jmp);
5260         }
5261         set_cur_block(NULL);
5262 }
5263
5264 static void asm_statement_to_firm(const asm_statement_t *statement)
5265 {
5266         bool needs_memory = false;
5267
5268         if (statement->is_volatile) {
5269                 needs_memory = true;
5270         }
5271
5272         size_t         n_clobbers = 0;
5273         asm_clobber_t *clobber    = statement->clobbers;
5274         for ( ; clobber != NULL; clobber = clobber->next) {
5275                 const char *clobber_str = clobber->clobber.begin;
5276
5277                 if (!be_is_valid_clobber(clobber_str)) {
5278                         errorf(&statement->base.source_position,
5279                                    "invalid clobber '%s' specified", clobber->clobber);
5280                         continue;
5281                 }
5282
5283                 if (strcmp(clobber_str, "memory") == 0) {
5284                         needs_memory = true;
5285                         continue;
5286                 }
5287
5288                 ident *id = new_id_from_str(clobber_str);
5289                 obstack_ptr_grow(&asm_obst, id);
5290                 ++n_clobbers;
5291         }
5292         assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
5293         ident **clobbers = NULL;
5294         if (n_clobbers > 0) {
5295                 clobbers = obstack_finish(&asm_obst);
5296         }
5297
5298         size_t n_inputs  = 0;
5299         asm_argument_t *argument = statement->inputs;
5300         for ( ; argument != NULL; argument = argument->next)
5301                 n_inputs++;
5302         size_t n_outputs = 0;
5303         argument = statement->outputs;
5304         for ( ; argument != NULL; argument = argument->next)
5305                 n_outputs++;
5306
5307         unsigned next_pos = 0;
5308
5309         ir_node *ins[n_inputs + n_outputs + 1];
5310         size_t   in_size = 0;
5311
5312         ir_asm_constraint tmp_in_constraints[n_outputs];
5313
5314         const expression_t *out_exprs[n_outputs];
5315         ir_node            *out_addrs[n_outputs];
5316         size_t              out_size = 0;
5317
5318         argument = statement->outputs;
5319         for ( ; argument != NULL; argument = argument->next) {
5320                 const char *constraints = argument->constraints.begin;
5321                 asm_constraint_flags_t asm_flags
5322                         = be_parse_asm_constraints(constraints);
5323
5324                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5325                         warningf(&statement->base.source_position,
5326                                "some constraints in '%s' are not supported", constraints);
5327                 }
5328                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5329                         errorf(&statement->base.source_position,
5330                                "some constraints in '%s' are invalid", constraints);
5331                         continue;
5332                 }
5333                 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5334                         errorf(&statement->base.source_position,
5335                                "no write flag specified for output constraints '%s'",
5336                                constraints);
5337                         continue;
5338                 }
5339
5340                 unsigned pos = next_pos++;
5341                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5342                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5343                         expression_t *expr = argument->expression;
5344                         ir_node      *addr = expression_to_addr(expr);
5345                         /* in+output, construct an artifical same_as constraint on the
5346                          * input */
5347                         if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5348                                 char     buf[64];
5349                                 ir_node *value = get_value_from_lvalue(expr, addr);
5350
5351                                 snprintf(buf, sizeof(buf), "%u", (unsigned) out_size);
5352
5353                                 ir_asm_constraint constraint;
5354                                 constraint.pos              = pos;
5355                                 constraint.constraint       = new_id_from_str(buf);
5356                                 constraint.mode             = get_ir_mode_storage(expr->base.type);
5357                                 tmp_in_constraints[in_size] = constraint;
5358                                 ins[in_size] = value;
5359
5360                                 ++in_size;
5361                         }
5362
5363                         out_exprs[out_size] = expr;
5364                         out_addrs[out_size] = addr;
5365                         ++out_size;
5366                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5367                         /* pure memory ops need no input (but we have to make sure we
5368                          * attach to the memory) */
5369                         assert(! (asm_flags &
5370                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5371                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5372                         needs_memory = true;
5373
5374                         /* we need to attach the address to the inputs */
5375                         expression_t *expr = argument->expression;
5376
5377                         ir_asm_constraint constraint;
5378                         constraint.pos              = pos;
5379                         constraint.constraint       = new_id_from_str(constraints);
5380                         constraint.mode             = NULL;
5381                         tmp_in_constraints[in_size] = constraint;
5382
5383                         ins[in_size]          = expression_to_addr(expr);
5384                         ++in_size;
5385                         continue;
5386                 } else {
5387                         errorf(&statement->base.source_position,
5388                                "only modifiers but no place set in constraints '%s'",
5389                                constraints);
5390                         continue;
5391                 }
5392
5393                 ir_asm_constraint constraint;
5394                 constraint.pos        = pos;
5395                 constraint.constraint = new_id_from_str(constraints);
5396                 constraint.mode       = get_ir_mode_storage(argument->expression->base.type);
5397
5398                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5399         }
5400         assert(obstack_object_size(&asm_obst)
5401                         == out_size * sizeof(ir_asm_constraint));
5402         ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5403
5404
5405         obstack_grow(&asm_obst, tmp_in_constraints,
5406                      in_size * sizeof(tmp_in_constraints[0]));
5407         /* find and count input and output arguments */
5408         argument = statement->inputs;
5409         for ( ; argument != NULL; argument = argument->next) {
5410                 const char *constraints = argument->constraints.begin;
5411                 asm_constraint_flags_t asm_flags
5412                         = be_parse_asm_constraints(constraints);
5413
5414                 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5415                         errorf(&statement->base.source_position,
5416                                "some constraints in '%s' are not supported", constraints);
5417                         continue;
5418                 }
5419                 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5420                         errorf(&statement->base.source_position,
5421                                "some constraints in '%s' are invalid", constraints);
5422                         continue;
5423                 }
5424                 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5425                         errorf(&statement->base.source_position,
5426                                "write flag specified for input constraints '%s'",
5427                                constraints);
5428                         continue;
5429                 }
5430
5431                 ir_node *input;
5432                 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5433                                 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5434                         /* we can treat this as "normal" input */
5435                         input = expression_to_firm(argument->expression);
5436                 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5437                         /* pure memory ops need no input (but we have to make sure we
5438                          * attach to the memory) */
5439                         assert(! (asm_flags &
5440                                                 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5441                                                  | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5442                         needs_memory = true;
5443                         input = expression_to_addr(argument->expression);
5444                 } else {
5445                         errorf(&statement->base.source_position,
5446                                "only modifiers but no place set in constraints '%s'",
5447                                constraints);
5448                         continue;
5449                 }
5450
5451                 ir_asm_constraint constraint;
5452                 constraint.pos        = next_pos++;
5453                 constraint.constraint = new_id_from_str(constraints);
5454                 constraint.mode       = get_irn_mode(input);
5455
5456                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5457                 ins[in_size++] = input;
5458         }
5459
5460         if (needs_memory) {
5461                 ir_asm_constraint constraint;
5462                 constraint.pos        = next_pos++;
5463                 constraint.constraint = new_id_from_str("");
5464                 constraint.mode       = mode_M;
5465
5466                 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5467                 ins[in_size++] = get_store();
5468         }
5469
5470         assert(obstack_object_size(&asm_obst)
5471                         == in_size * sizeof(ir_asm_constraint));
5472         ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5473
5474         /* create asm node */
5475         dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5476
5477         ident *asm_text = new_id_from_str(statement->asm_text.begin);
5478
5479         ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5480                                   out_size, output_constraints,
5481                                   n_clobbers, clobbers, asm_text);
5482
5483         if (statement->is_volatile) {
5484                 set_irn_pinned(node, op_pin_state_pinned);
5485         } else {
5486                 set_irn_pinned(node, op_pin_state_floats);
5487         }
5488
5489         /* create output projs & connect them */
5490         if (needs_memory) {
5491                 ir_node *projm = new_Proj(node, mode_M, out_size);
5492                 set_store(projm);
5493         }
5494
5495         size_t i;
5496         for (i = 0; i < out_size; ++i) {
5497                 const expression_t *out_expr = out_exprs[i];
5498                 long                pn       = i;
5499                 ir_mode            *mode     = get_ir_mode_storage(out_expr->base.type);
5500                 ir_node            *proj     = new_Proj(node, mode, pn);
5501                 ir_node            *addr     = out_addrs[i];
5502
5503                 set_value_for_expression_addr(out_expr, proj, addr);
5504         }
5505 }
5506
5507 static void     ms_try_statement_to_firm(ms_try_statement_t *statement)
5508 {
5509         statement_to_firm(statement->try_statement);
5510         warningf(&statement->base.source_position, "structured exception handling ignored");
5511 }
5512
5513 static void     leave_statement_to_firm(leave_statement_t *statement)
5514 {
5515         errorf(&statement->base.source_position, "__leave not supported yet");
5516 }
5517
5518 /**
5519  * Transform a statement.
5520  */
5521 static void statement_to_firm(statement_t *statement)
5522 {
5523 #ifndef NDEBUG
5524         assert(!statement->base.transformed);
5525         statement->base.transformed = true;
5526 #endif
5527
5528         switch (statement->kind) {
5529         case STATEMENT_INVALID:
5530                 panic("invalid statement found");
5531         case STATEMENT_EMPTY:
5532                 /* nothing */
5533                 return;
5534         case STATEMENT_COMPOUND:
5535                 compound_statement_to_firm(&statement->compound);
5536                 return;
5537         case STATEMENT_RETURN:
5538                 return_statement_to_firm(&statement->returns);
5539                 return;
5540         case STATEMENT_EXPRESSION:
5541                 expression_statement_to_firm(&statement->expression);
5542                 return;
5543         case STATEMENT_IF:
5544                 if_statement_to_firm(&statement->ifs);
5545                 return;
5546         case STATEMENT_WHILE:
5547                 while_statement_to_firm(&statement->whiles);
5548                 return;
5549         case STATEMENT_DO_WHILE:
5550                 do_while_statement_to_firm(&statement->do_while);
5551                 return;
5552         case STATEMENT_DECLARATION:
5553                 declaration_statement_to_firm(&statement->declaration);
5554                 return;
5555         case STATEMENT_BREAK:
5556                 create_jump_statement(statement, get_break_label());
5557                 return;
5558         case STATEMENT_CONTINUE:
5559                 create_jump_statement(statement, continue_label);
5560                 return;
5561         case STATEMENT_SWITCH:
5562                 switch_statement_to_firm(&statement->switchs);
5563                 return;
5564         case STATEMENT_CASE_LABEL:
5565                 case_label_to_firm(&statement->case_label);
5566                 return;
5567         case STATEMENT_FOR:
5568                 for_statement_to_firm(&statement->fors);
5569                 return;
5570         case STATEMENT_LABEL:
5571                 label_to_firm(&statement->label);
5572                 return;
5573         case STATEMENT_GOTO:
5574                 goto_to_firm(&statement->gotos);
5575                 return;
5576         case STATEMENT_ASM:
5577                 asm_statement_to_firm(&statement->asms);
5578                 return;
5579         case STATEMENT_MS_TRY:
5580                 ms_try_statement_to_firm(&statement->ms_try);
5581                 return;
5582         case STATEMENT_LEAVE:
5583                 leave_statement_to_firm(&statement->leave);
5584                 return;
5585         }
5586         panic("statement not implemented");
5587 }
5588
5589 static int count_local_variables(const entity_t *entity,
5590                                  const entity_t *const last)
5591 {
5592         int count = 0;
5593         entity_t const *const end = last != NULL ? last->base.next : NULL;
5594         for (; entity != end; entity = entity->base.next) {
5595                 type_t *type;
5596                 bool    address_taken;
5597
5598                 if (entity->kind == ENTITY_VARIABLE) {
5599                         type          = skip_typeref(entity->declaration.type);
5600                         address_taken = entity->variable.address_taken;
5601                 } else if (entity->kind == ENTITY_PARAMETER) {
5602                         type          = skip_typeref(entity->declaration.type);
5603                         address_taken = entity->parameter.address_taken;
5604                 } else {
5605                         continue;
5606                 }
5607
5608                 if (!address_taken && is_type_scalar(type))
5609                         ++count;
5610         }
5611         return count;
5612 }
5613
5614 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5615 {
5616         int *const count = env;
5617
5618         switch (stmt->kind) {
5619         case STATEMENT_DECLARATION: {
5620                 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5621                 *count += count_local_variables(decl_stmt->declarations_begin,
5622                                 decl_stmt->declarations_end);
5623                 break;
5624         }
5625
5626         case STATEMENT_FOR:
5627                 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5628                 break;
5629
5630         default:
5631                 break;
5632         }
5633 }
5634
5635 /**
5636  * Return the number of local (alias free) variables used by a function.
5637  */
5638 static int get_function_n_local_vars(entity_t *entity)
5639 {
5640         const function_t *function = &entity->function;
5641         int count = 0;
5642
5643         /* count parameters */
5644         count += count_local_variables(function->parameters.entities, NULL);
5645
5646         /* count local variables declared in body */
5647         walk_statements(function->statement, count_local_variables_in_stmt, &count);
5648         return count;
5649 }
5650
5651 /**
5652  * Build Firm code for the parameters of a function.
5653  */
5654 static void initialize_function_parameters(entity_t *entity)
5655 {
5656         assert(entity->kind == ENTITY_FUNCTION);
5657         ir_graph *irg             = current_ir_graph;
5658         ir_node  *args            = get_irg_args(irg);
5659         ir_type  *function_irtype = get_ir_type(entity->declaration.type);
5660         int      first_param_nr   = 0;
5661
5662         if (entity->function.need_closure) {
5663                 /* add an extra parameter for the static link */
5664                 entity->function.static_link = new_r_Proj(args, mode_P_data, 0);
5665                 ++first_param_nr;
5666         }
5667
5668         int       n         = 0;
5669         entity_t *parameter = entity->function.parameters.entities;
5670         for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5671                 if (parameter->kind != ENTITY_PARAMETER)
5672                         continue;
5673
5674                 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5675                 type_t *type = skip_typeref(parameter->declaration.type);
5676
5677                 bool needs_entity = parameter->parameter.address_taken;
5678                 assert(!is_type_array(type));
5679                 if (is_type_compound(type)) {
5680                         needs_entity = true;
5681                 }
5682
5683                 if (needs_entity) {
5684                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5685                         ident     *id     = new_id_from_str(parameter->base.symbol->string);
5686                         set_entity_ident(entity, id);
5687
5688                         parameter->declaration.kind
5689                                 = DECLARATION_KIND_PARAMETER_ENTITY;
5690                         parameter->parameter.v.entity = entity;
5691                         continue;
5692                 }
5693
5694                 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5695                 ir_mode *param_mode   = get_type_mode(param_irtype);
5696
5697                 long     pn    = n + first_param_nr;
5698                 ir_node *value = new_r_Proj(args, param_mode, pn);
5699
5700                 ir_mode *mode = get_ir_mode_storage(type);
5701                 value = create_conv(NULL, value, mode);
5702                 value = do_strict_conv(NULL, value);
5703
5704                 parameter->declaration.kind         = DECLARATION_KIND_PARAMETER;
5705                 parameter->parameter.v.value_number = next_value_number_function;
5706                 set_irg_loc_description(current_ir_graph, next_value_number_function,
5707                                         parameter);
5708                 ++next_value_number_function;
5709
5710                 set_value(parameter->parameter.v.value_number, value);
5711         }
5712 }
5713
5714 /**
5715  * Handle additional decl modifiers for IR-graphs
5716  *
5717  * @param irg            the IR-graph
5718  * @param dec_modifiers  additional modifiers
5719  */
5720 static void handle_decl_modifier_irg(ir_graph_ptr irg,
5721                                      decl_modifiers_t decl_modifiers)
5722 {
5723         if (decl_modifiers & DM_RETURNS_TWICE) {
5724                 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5725                 add_irg_additional_properties(irg, mtp_property_returns_twice);
5726         }
5727         if (decl_modifiers & DM_NORETURN) {
5728                 /* TRUE if the declaration includes the Microsoft
5729                    __declspec(noreturn) specifier. */
5730                 add_irg_additional_properties(irg, mtp_property_noreturn);
5731         }
5732         if (decl_modifiers & DM_NOTHROW) {
5733                 /* TRUE if the declaration includes the Microsoft
5734                    __declspec(nothrow) specifier. */
5735                 add_irg_additional_properties(irg, mtp_property_nothrow);
5736         }
5737         if (decl_modifiers & DM_NAKED) {
5738                 /* TRUE if the declaration includes the Microsoft
5739                    __declspec(naked) specifier. */
5740                 add_irg_additional_properties(irg, mtp_property_naked);
5741         }
5742         if (decl_modifiers & DM_FORCEINLINE) {
5743                 /* TRUE if the declaration includes the
5744                    Microsoft __forceinline specifier. */
5745                 set_irg_inline_property(irg, irg_inline_forced);
5746         }
5747         if (decl_modifiers & DM_NOINLINE) {
5748                 /* TRUE if the declaration includes the Microsoft
5749                    __declspec(noinline) specifier. */
5750                 set_irg_inline_property(irg, irg_inline_forbidden);
5751         }
5752 }
5753
5754 static void add_function_pointer(ir_type *segment, ir_entity *method,
5755                                  const char *unique_template)
5756 {
5757         ir_type   *method_type  = get_entity_type(method);
5758         ir_type   *ptr_type     = new_type_pointer(method_type);
5759
5760         /* these entities don't really have a name but firm only allows
5761          * "" in ld_ident.
5762          * Note that we mustn't give these entities a name since for example
5763          * Mach-O doesn't allow them. */
5764         ident     *ide          = id_unique(unique_template);
5765         ir_entity *ptr          = new_entity(segment, ide, ptr_type);
5766         ir_graph  *irg          = get_const_code_irg();
5767         ir_node   *val          = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5768                                                            method);
5769
5770         set_entity_ld_ident(ptr, new_id_from_chars("", 0));
5771         set_entity_compiler_generated(ptr, 1);
5772         set_entity_visibility(ptr, ir_visibility_private);
5773         add_entity_linkage(ptr, IR_LINKAGE_CONSTANT|IR_LINKAGE_HIDDEN_USER);
5774         set_atomic_ent_value(ptr, val);
5775 }
5776
5777 /**
5778  * Generate possible IJmp branches to a given label block.
5779  */
5780 static void gen_ijmp_branches(ir_node *block)
5781 {
5782         ir_node *ijmp;
5783         for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5784                 add_immBlock_pred(block, ijmp);
5785         }
5786 }
5787
5788 /**
5789  * Create code for a function and all inner functions.
5790  *
5791  * @param entity  the function entity
5792  */
5793 static void create_function(entity_t *entity)
5794 {
5795         assert(entity->kind == ENTITY_FUNCTION);
5796         ir_entity *function_entity = get_function_entity(entity, current_outer_frame);
5797
5798         if (entity->function.statement == NULL)
5799                 return;
5800
5801         if (is_main(entity) && enable_main_collect2_hack) {
5802                 prepare_main_collect2(entity);
5803         }
5804
5805         inner_functions     = NULL;
5806         current_trampolines = NULL;
5807
5808         if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5809                 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5810                 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5811         }
5812         if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5813                 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5814                 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5815         }
5816
5817         current_function_entity = entity;
5818         current_function_name   = NULL;
5819         current_funcsig         = NULL;
5820
5821         assert(all_labels == NULL);
5822         all_labels = NEW_ARR_F(label_t *, 0);
5823         ijmp_list  = NULL;
5824
5825         int       n_local_vars = get_function_n_local_vars(entity);
5826         ir_graph *irg          = new_ir_graph(function_entity, n_local_vars);
5827         current_ir_graph = irg;
5828
5829         ir_graph *old_current_function = current_function;
5830         current_function = irg;
5831
5832         set_irg_fp_model(irg, firm_opt.fp_model);
5833         tarval_enable_fp_ops(1);
5834         set_irn_dbg_info(get_irg_start_block(irg),
5835                          get_entity_dbg_info(function_entity));
5836
5837         ir_node *first_block = get_cur_block();
5838
5839         /* set inline flags */
5840         if (entity->function.is_inline)
5841                 set_irg_inline_property(irg, irg_inline_recomended);
5842         handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5843
5844         next_value_number_function = 0;
5845         initialize_function_parameters(entity);
5846         current_static_link = entity->function.static_link;
5847
5848         statement_to_firm(entity->function.statement);
5849
5850         ir_node *end_block = get_irg_end_block(irg);
5851
5852         /* do we have a return statement yet? */
5853         if (get_cur_block() != NULL) {
5854                 type_t *type = skip_typeref(entity->declaration.type);
5855                 assert(is_type_function(type));
5856                 const function_type_t *func_type   = &type->function;
5857                 const type_t          *return_type
5858                         = skip_typeref(func_type->return_type);
5859
5860                 ir_node *ret;
5861                 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5862                         ret = new_Return(get_store(), 0, NULL);
5863                 } else {
5864                         ir_mode *mode;
5865                         if (is_type_scalar(return_type)) {
5866                                 mode = get_ir_mode_storage(func_type->return_type);
5867                         } else {
5868                                 mode = mode_P_data;
5869                         }
5870
5871                         ir_node *in[1];
5872                         /* §5.1.2.2.3 main implicitly returns 0 */
5873                         if (is_main(entity)) {
5874                                 in[0] = new_Const(get_mode_null(mode));
5875                         } else {
5876                                 in[0] = new_Unknown(mode);
5877                         }
5878                         ret = new_Return(get_store(), 1, in);
5879                 }
5880                 add_immBlock_pred(end_block, ret);
5881         }
5882
5883         bool has_computed_gotos = false;
5884         for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5885                 label_t *label = all_labels[i];
5886                 if (label->address_taken) {
5887                         gen_ijmp_branches(label->block);
5888                         has_computed_gotos = true;
5889                 }
5890                 mature_immBlock(label->block);
5891         }
5892         if (has_computed_gotos) {
5893                 /* if we have computed goto's in the function, we cannot inline it */
5894                 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5895                         warningf(&entity->base.source_position,
5896                                  "function '%Y' can never be inlined because it contains a computed goto",
5897                                  entity->base.symbol);
5898                 }
5899                 set_irg_inline_property(irg, irg_inline_forbidden);
5900         }
5901
5902         DEL_ARR_F(all_labels);
5903         all_labels = NULL;
5904
5905         mature_immBlock(first_block);
5906         mature_immBlock(end_block);
5907
5908         irg_finalize_cons(irg);
5909
5910         /* finalize the frame type */
5911         ir_type *frame_type = get_irg_frame_type(irg);
5912         int      n          = get_compound_n_members(frame_type);
5913         int      align_all  = 4;
5914         int      offset     = 0;
5915         for (int i = 0; i < n; ++i) {
5916                 ir_entity *entity      = get_compound_member(frame_type, i);
5917                 ir_type   *entity_type = get_entity_type(entity);
5918
5919                 int align = get_type_alignment_bytes(entity_type);
5920                 if (align > align_all)
5921                         align_all = align;
5922                 int misalign = 0;
5923                 if (align > 0) {
5924                         misalign  = offset % align;
5925                         if (misalign > 0) {
5926                                 offset += align - misalign;
5927                         }
5928                 }
5929
5930                 set_entity_offset(entity, offset);
5931                 offset += get_type_size_bytes(entity_type);
5932         }
5933         set_type_size_bytes(frame_type, offset);
5934         set_type_alignment_bytes(frame_type, align_all);
5935
5936         irg_verify(irg, VERIFY_ENFORCE_SSA);
5937         current_function = old_current_function;
5938
5939         if (current_trampolines != NULL) {
5940                 DEL_ARR_F(current_trampolines);
5941                 current_trampolines = NULL;
5942         }
5943
5944         /* create inner functions if any */
5945         entity_t **inner = inner_functions;
5946         if (inner != NULL) {
5947                 ir_type *rem_outer_frame      = current_outer_frame;
5948                 current_outer_frame           = get_irg_frame_type(current_ir_graph);
5949                 ir_type *rem_outer_value_type = current_outer_value_type;
5950                 current_outer_value_type      = get_irg_value_param_type(current_ir_graph);
5951                 for (int i = ARR_LEN(inner) - 1; i >= 0; --i) {
5952                         create_function(inner[i]);
5953                 }
5954                 DEL_ARR_F(inner);
5955
5956                 current_outer_value_type = rem_outer_value_type;
5957                 current_outer_frame      = rem_outer_frame;
5958         }
5959 }
5960
5961 static void scope_to_firm(scope_t *scope)
5962 {
5963         /* first pass: create declarations */
5964         entity_t *entity = scope->entities;
5965         for ( ; entity != NULL; entity = entity->base.next) {
5966                 if (entity->base.symbol == NULL)
5967                         continue;
5968
5969                 if (entity->kind == ENTITY_FUNCTION) {
5970                         if (entity->function.btk != bk_none) {
5971                                 /* builtins have no representation */
5972                                 continue;
5973                         }
5974                         (void)get_function_entity(entity, NULL);
5975                 } else if (entity->kind == ENTITY_VARIABLE) {
5976                         create_global_variable(entity);
5977                 } else if (entity->kind == ENTITY_NAMESPACE) {
5978                         scope_to_firm(&entity->namespacee.members);
5979                 }
5980         }
5981
5982         /* second pass: create code/initializers */
5983         entity = scope->entities;
5984         for ( ; entity != NULL; entity = entity->base.next) {
5985                 if (entity->base.symbol == NULL)
5986                         continue;
5987
5988                 if (entity->kind == ENTITY_FUNCTION) {
5989                         if (entity->function.btk != bk_none) {
5990                                 /* builtins have no representation */
5991                                 continue;
5992                         }
5993                         create_function(entity);
5994                 } else if (entity->kind == ENTITY_VARIABLE) {
5995                         assert(entity->declaration.kind
5996                                         == DECLARATION_KIND_GLOBAL_VARIABLE);
5997                         current_ir_graph = get_const_code_irg();
5998                         create_variable_initializer(entity);
5999                 }
6000         }
6001 }
6002
6003 void init_ast2firm(void)
6004 {
6005         obstack_init(&asm_obst);
6006         init_atomic_modes();
6007
6008         ir_set_debug_retrieve(dbg_retrieve);
6009         ir_set_type_debug_retrieve(dbg_print_type_dbg_info);
6010
6011         /* create idents for all known runtime functions */
6012         for (size_t i = 0; i < lengthof(rts_data); ++i) {
6013                 rts_idents[i] = new_id_from_str(rts_data[i].name);
6014         }
6015
6016         entitymap_init(&entitymap);
6017 }
6018
6019 static void init_ir_types(void)
6020 {
6021         static int ir_types_initialized = 0;
6022         if (ir_types_initialized)
6023                 return;
6024         ir_types_initialized = 1;
6025
6026         ir_type_int        = get_ir_type(type_int);
6027         ir_type_char       = get_ir_type(type_char);
6028         ir_type_const_char = get_ir_type(type_const_char);
6029         ir_type_wchar_t    = get_ir_type(type_wchar_t);
6030         ir_type_void       = get_ir_type(type_void);
6031
6032         be_params             = be_get_backend_param();
6033         mode_float_arithmetic = be_params->mode_float_arithmetic;
6034
6035         stack_param_align     = be_params->stack_param_align;
6036 }
6037
6038 void exit_ast2firm(void)
6039 {
6040         entitymap_destroy(&entitymap);
6041         obstack_free(&asm_obst, NULL);
6042 }
6043
6044 static void global_asm_to_firm(statement_t *s)
6045 {
6046         for (; s != NULL; s = s->base.next) {
6047                 assert(s->kind == STATEMENT_ASM);
6048
6049                 char const *const text = s->asms.asm_text.begin;
6050                 size_t            size = s->asms.asm_text.size;
6051
6052                 /* skip the last \0 */
6053                 if (text[size - 1] == '\0')
6054                         --size;
6055
6056                 ident *const id = new_id_from_chars(text, size);
6057                 add_irp_asm(id);
6058         }
6059 }
6060
6061 void translation_unit_to_firm(translation_unit_t *unit)
6062 {
6063         /* initialize firm arithmetic */
6064         tarval_set_integer_overflow_mode(TV_OVERFLOW_WRAP);
6065         ir_set_uninitialized_local_variable_func(uninitialized_local_var);
6066
6067         /* just to be sure */
6068         continue_label           = NULL;
6069         break_label              = NULL;
6070         current_switch_cond      = NULL;
6071         current_translation_unit = unit;
6072
6073         init_ir_types();
6074
6075         scope_to_firm(&unit->scope);
6076         global_asm_to_firm(unit->global_asm);
6077
6078         current_ir_graph         = NULL;
6079         current_translation_unit = NULL;
6080 }